Source Of Mechanical Energy Engineering Essay

Source Of Mechanical Energy Engineering Essay Introduction Electricity is a basic part of nature and it is one of our most widely used forms of energy. It is a secondary energy source that we get it from the conversion of other sources of energy, like coal, natural gas, oil, nuclear power and other natural sources, which are called primary sources. Many cities and towns were built alongside waterfalls (a primary source of mechanical energy) that turned water wheels to perform work. Electricity consists of the presence of electric charges, as well as the flow of those charges. There are three forms of electricity. One form is static electricity, which is the presence of either positive (+) or negative (à ¢Ã‹â€ Ã¢â‚¬â„¢) electric charges in or on an object, usually a non-conducting material. The second form of electricity is the flow or movement of free electrons through a conducting material, such as a metal wire, toward an area of positive electric charges Electricity appears in two forms: alternating current (AC) and direct current (DC). Direct current does not change directions the electron flow is always from the negative pole to the positive pole although as we mentioned before, the electrons themselves dont really move, its the holes that are created that move. Direct current is almost always what is used inside of electronic devices to power the various internal components, but it is a harmful thing in audio signals, which are alternating current. Alternating current (AC) electricity is the type of electricity commonly used in homes and businesses throughout the world. While direct current (DC) electricity flows in one direction through a wire, AC electricity alternates its direction in a back-and-forth motion. The direction alternates between 50 and 60 times per second, depending on the electrical system of the country. AC electricity is created by an AC electric generator, which determines the frequency. What is special about AC electricity is that the voltage can be readily changed, thus making it more suitable for long-distance transmission than DC electricity. But also, AC can employ capacitors and inductors in electronic circuitry, allowing for a wide range of applications. Direct current or DC electricity is the continuous movement of electrons from an area of negative (à ¢Ã‹â€ Ã¢â‚¬â„¢) charges to an area of positive (+) charges through a conducting material such as a metal wire. Whereas static electricity sparks consist of the sudden movement of electrons from a negative to positive surface, DC electricity is the continuous movement of the electrons through a wire. A DC circuit is necessary to allow the current or steam of electrons to flow. Such a circuit consists of a source of electrical energy (such as a battery) and a conducting wire running from the positive end of the source to the negative terminal. Electrical devices may be included in the circuit. DC electricity in a circuit consists of voltage, current and resistance. The flow of DC electricity is similar to the flow of water through a hose. Electrical Wiring Electrical wiring system is a network of electrical conductors for carrying electrical current to the electrical equipment involved. This method is related to the wiring system for buildings in Malaysia. In Malaysia, the electric wiring system is subject to the rules established by the Energy Commission as provided under the Electricity Supply Act 1990, Electricity Regulations 1994, the MS IEC 60364:2003 Standard Electrical Installations of Building, MS 1936:2006 Electrical Installations of Building Guide To MS IEC 60364 and the MS 1979:2007 Electrical Installation of Building Code of Practice. Wiring systems used in Malaysia is very similar to the electrical wiring standards used by the United Kingdom but by the standards of the wire conductor already changed. NEW TOWN DEVELOPMENT SDN BHD PROJECT The high-rise building electrical system For The New Town Development Sdn Bhd project, this building was a high-rise commercial building. The building comprises of 4 storey basement parking and 7 storey shopping complex and the rest are offices lot. So, for the electrical installation should at every floor there were a number of electrical panels to serve all the lighting and power requirements on that floor including the lighting, switched socket outlets, toilet exhaust fans and anything else. Some areas of the office used an open floor office systems so under floor trunking was also used here. Besides, a few of the panel were located inside the riser room of each floor. However, since each was a large area some panels needed to be located at the office area. Wiring directly from the electrical riser would be unnecessarily too long. Therefore, the electrical consultant locates these electrical panels along the corridors throughout the building. The design architect was requested to provide small rooms to house the panel. Alternatively, small electrical cabinets with lockable doors and sufficient work access and ventilation would be acceptable. If the planned building is very high example like 40 storey office building or in cases where heavy loads are located at higher levels of the building, it may be necessary to provide substations at the higher levels of the building. For the 40-storey office building, an 11/415 kV substation may be necessary at one of the upper floor. It may be located at twentieth floor, for example. All the electrical substation room spaces as explained earlier will then need to be provided except the authoritys electrical rooms. The floors of this substation would then need to be specifically designed by the appointed structural consultants to handle the loads of all the substation equipment. Based on the structures and other factors was related. We propose the installation of electricity for this building using the radial system and ring main system. Because its easier to maintain and simple system for the design and construction. In addition, using the rising main distribution system is important because the building is more than 5 levels. So, to distribute electric power at every level is appropriate to use the rising main for the building. Basement A basement is one or more floors of a building that are either completely or partially below the ground floor. Basements are typically used as a utility space for a building where such items as the furnace, water heater, breaker panel or fuse box, car park, and air-conditioning system are located; so also are amenities such as the electrical distribution system, and cable television distribution point. In British English the word basement is used for underground floors of, for example, department stores but is used for a space below the ground floor of a house only when it is habitable, with windows and (usually) its own access. The word cellar is used to apply to any such large underground room. Subcellar is a cellar that lies further underneath. Based on the planned building project, the level of 1st to 4th is the basement. In part this is a car park. Therefore, we recommend the installation of electricity in the area using ring system. Ring system is ideal because in this part do not use electrical appliances and many others. Basement car parks.jpg Basement pendlehill1.jpg Basement Ring Main System in Basement A ring main wiring circuit is the alternative to a radial wiring circuit. In a radial wiring circuit, the wiring starts at the circuit breaker and connects to each device on the circuit (fans, outlets, lamps, etc) in turn. When it reaches the last device, the wiring simply ends. Ring main wiring goes one step further instead of ending the wiring at the last device; it pulls more wiring back from the last device to the circuit breaker, completing a loop. Ring main wiring is required in some places, and illegal in others. The main advantage to a ring main system is smaller wiring. Since each device on the ring has two hot wires connecting it to the circuit breaker (one on each side of the loop), smaller wiring can be used to safely carry the electric current. Smaller wire is both cheaper and easier to work with. It bends more easily, can be pulled around corners with less effort, and is easier to fit into the screws and connectors you need to attach it to. One other advantage is wiring distance. Wire has some small amount of resistance, and the longer the wire goes to reach the device it is powering, the more resistance it has. This results in a voltage drop over the length of the wire run (by Ohms Law), which could affect the operation of your electrical devices if it drops too low. The maximum distance from the circuit breaker around the ring is the midpoint of the ring, while the maximum distance in a radial circuit is the end of the chain. In this manner, the ring setup effectively cuts the distance to the farthest device in half. The radial system does have one advantage over ring main. If a break were to occur somewhere in the wiring loop of a ring main system, you wouldnt know it. Everything would still function normally because it is still powered from one end. However, this means that if you took advantage of the ability to run smaller wiring (and everyone does), your wire is now undersized for the current it is expected to handle because the system is no longer powered from two wires, only one. This can result in overheating of the wires, which in turn breaks down the insulation and can start a fire. In electricity supply, a ring final circuit or ring circuit (informally also ring main or just ring) is an electrical wiring technique developed and primarily used in the United Kingdom that provides two independent conductors for live, neutral and protective earth (ground) within a building for each connected load or socket. 557px-Ring_circuit.svg.png ring distribution Ring Main Distribution Size of cable used to ring system is 2.5 mm2. Installation Rules of Ring System at basement Rules for ring circuits say that the cable rating must be no less than two thirds of the rating of the protective device. This means that the risk of sustained overloading of the cable can be considered minimal. In practice, however, it is extremely uncommon to encounter a ring with a protective device other than a 30 A fuse, 30 A breaker, or 32 A breaker, and a cable size other than those mentioned above. The IEE Wiring Regulations (BS 7671) permit an unlimited number of socket outlets to be installed on a ring circuit, provided that the floor area served does not exceed 100 m2. In practice, most small and medium houses have one ring circuit per storey, but for this building should having more. An installation designer may determine by experience and calculation whether additional circuits are required for areas of high demand; for example, it is common practice to put kitchens on their own ring circuit or sometimes a ring circuit shared with a utility room to avoid putting a heavy load at one point on the main downstairs ring circuit. A heavy concentration of load close together on a ring circuit can cause minor overloading of one of the cables if near the end of the ring, so kitchens should not be wired at one end of a ring circuit. Unfused spurs from a ring wired in the same cable as the ring are allowed to run one single or double socket (the use of two singles was previously allowed but was banned because of people replacing them with doubles) or one fused connection unit (FCU). Spurs may either start from a socket or be joined to the ring cable with a junction box or other approved method of joining cables. Triple and larger sockets are generally fused and therefore can also be placed on a spur. It is not permitted to have more spurs than sockets on the ring, and it is considered bad practice by most electricians to have spurs in a new installation (some think they are bad practice in all cases).Where loads other than BS 1363 sockets are connected to a ring circuit or it is desired to place more than one socket for low power equipment on a spur, a BS 1363 fused connection unit (FCU) is used. In the case of fixed appliances this will be a switched fused connection unit (SFCU) to provide a point of isolation for the appliance, but in other cases such as feeding multiple lighting points (putting lighting on a ring through is generally considered bad practice in new installation but is often done when adding lights to an existing property) or multiple sockets, an unswitched one is often preferable. Shopping Complex Based on commercial building a project was planned by the New Town Development Sdn Bhd. A 40 storey high building will put the shopping complex of seven stories are starting at level 5th to 11th. Thus, the electrical installation for this we propose to use a radial system. We feel the radial system is suitable for shopping complex. Because there are a lot of use of electrical appliances such as lights, air conditioners and so on. In addition, the radial system is easy to designed, built and maintained. Shopping Complex at level 5th Shopping Complex at level 5th 8th Offices In this building project, a total of 29 levels will be provided for offices start from level 12th to 40th. Based on this, we agreed to use the same method of electrical installations such as shopping complexes, namely the radial system. This method is ideal because it is easy to maintain. In addition, if there is damage to the wire. It is easily known and easily repaired than the ring system. Office Radial System in Shopping Complex and Offices The radial system is widely used, economical systems often found in low-load density areas. To reduce the duration of interruption, overhead feeders can be protected by automatic reclosing devices located at the substation or at various locations on the feeder. This device reenergizes the feeder if the fault is temporary. To further reduce the duration and extent of customer interruptions, sectionalizing fuses are installed on branches of radial feeders allowing unaffected portions of a feeder to remain in service. Radial distribution systems are the simplest systems to plan, construct, and maintain, but are also the least reliable because of the radial nature of the design being served from a single source at a time. If any part of the system experiences a failure, some or all of the customers served by the radial feeder will be without power until a repair is completed. Straightforward design, lower cost, and decent reliability are the distinguishing characteristics of the RDS. An auto-loop distribution system is a special type of radial distribution system and is differentiated by having two feeders that tie to a customer load. The auto-loop system automatically senses the loss of one source of voltage and quickly and automatically switches the load to the second feeder. This type of system adds reliability benefits by keeping outages to a few seconds (or less) but the added cost of having two sets of utility equipment at one location, could be as high as hundreds of thousands of dollars for each installation. radial distribution Radial System Radial system distribution Size of cable commonly used for circuit radius is 4 mm2 Rising Main Distribution for commercial building For multi-storey buildings such as this are ideal to use the rising system. This is because, to ensure that each level of the building is fully supplied with electricity from renewable sources of electricity. A riser is a feeding cable or pipe giving supply to upper floors of a multi-storey building (high rise building). The above picture shows a typical installation of bus duct rising mains in the riser room at individual floor of a high rise building (The Bus duct was taken in the riser room at one of the upper floors of a high rise building). Most of the major components of a bus duct riser system. In electrical works, a riser is a set of cables the supply the upper floors. The feeding cables rise up straight to the top floor. Then at each floor a tap-off unit is connected so electricity can be supplied to that floor (for this project, we propose the radial distribution system). An alternative is to run one individual set of cables to each floor. Then there would be many cables that need to be installed the number of which is directly proportional to the number of upper floors. There are actually three risers, first one is the normal main electricity supply. This supply is just the normal authority supply like the one you have in your house. The 100A tap off unit is for this riser. The second tap off, which is one of the 60A units, is what is called essential supply, or emergency supply. It is a normal authority supply like the one you have from the 100A tap off unit above. However, it is also backed by a standby diesel generator. This means that if the electricity supply from the authority distribution network fails due to problem with their underground distribution cables or whatever, the standby electric generator would kick in and switch in the locally generated electricity to this electrical riser. Large capacity electric generators are expensive. Therefore, it is not economical to supply all electricity needs in the building from this generator. That is why separate electrical risers are used, and the normal riser is not backed by the generator supply. The third tap off unit (the second 60A unit) is for the air conditioning system. It is quite common (and is considered a better design) to have a separate feeder cable for the air conditioning and mechanical ventilation (ACMV) system in a large building. That is the reason for the third electrical riser here. rising main detail Rising Main Distribution Rising main distribution is use to distribute 415v 3-phase electricity from main distribution board to all floors. The copper vertical bus bars which run up in electricity cable riser. The vertical duct or trunking to the height of the building. To prevent the spread of fire and smoke, fire barriers are incorporated with the bus bar chamber at each compartment floor level. One more point to note here is that some office buildings use the generator-backed supply example like essential supply to feed the electrical riser for the air-conditioning system. With this arrangement, ACMV equipment that need to continue operating even during the mains failure do not need to be connected to ESSENTIAL supply riser, which is why it is given a separate riser in the first place. Observe the large flexible conduits coming out from the bottom of the tap off units and connect to the orange-colored electrical trunking. Some installations use rigid metal trunking for this purpose. Cables are run from a tap off unit into the flexible conduit to go to the orange metal trunking. They run inside the trunking to connect to the respective sub-switchboard. The switchboard for the air conditioning system is normally located inside the AHU room of that particular floor. From the sub-switchboards, separate outgoing cables are run inside the trunking to connect to separate distribution boards (DB) on that particular floor. Even though electrical installations at hospitals are relatively much more complex than the office building above, the installation at their hostel and staff quarters buildings are usually very simple. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhLer9NAo7iN1O-NTh6bN0M6iSMpqM6hnTwaoynS1z-CEY4ifjliiK5WakZcKP7hivp1DAJMXmaEJWfao7ua9QZXbqkSPPFH0ZZYHNnVpeX8j0M1idhGN-LCN2uvKApnVNyqdfC3s1td3W5/s320/Floor+Sub-switchboard+Picture.JPG Typical bus duct rising main at individual building floors https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjn_Qy_IBJLMAqdUaQh_CsNjM6c4egGKxu-cyng_x8icWGHjqQ532RDOEfInTqLTEDahsk6JD2xmjDYvtTgK-pdZ0TpuVzF6xf5jiGMnHOfhFq4jmyoum7Z-D5a27cW9CJPFFBwjWh_GUni/s320/Electrical+Busduct+Riser+Picture.jpg The electrical riser room Basically, there only two new components at each riser, which is the Termination Box (Feed In Box) and the incoming cables that terminate into the termination box. The generator-backed Essential supply cables need to have red colored insulation. It is because this supply is part of the fire emergency system of the building. A fire-rated cable must be able to continue operating for a certain number of hours during fire before it fails. This is the requirement. It used to be MICC (mineral insulated copper cables) cables that play this role, but now people use mostly the fire-rated cables for this purpose except in very special installation condition. The fire-rated cables are cheaper, easy to install and maintain. The black-colored cables are from the Normal supply. That means the other ends of the cables are connected to the Normal Supply main switchboard. While the red cables are connected to the Essential Supply main switchboard. Which means the Essential Supply main switchboard is the one that is backed by the standby electric generator. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixgunUStHLdmpmQ9j8u3_jJjdJmRJj2uLxABANZbsxkReBcgh-7gwkcCjjCgDLwLQg_wi9XfoL0pFaRmSXuZLSiuqq4wpwYGAmevhpZmysEXC5cGm29Svltd4QBewcGa0NuKEvbCwlRIQD/s320/Busbar+Trunking+Picture.jpg The bus duct risers at riser room https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEig3Ww7N04YHpSSlbqm9Lq_OwXmGS_g4Uq2JSIbOhYuHJNDdSoVBS5iXvvgJITwF81kh9NELU7GHiy5ElLxRXixWMu98V2dk0UPsssal0dF49lSXkDBBQTnzYJMWFHXIbw0m00faOyEu-M9/s320/60+A+TPN+Tap+Off+Unit+Image.jpg The front view of one of the 60A TPN tap off units https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjfBB83xMg6XcjhROkb9VF74psU09Jkk6-SvD9e7omUS9gVUYe_i643zLmVCtYuSS2QeezQmiNmiAm8UYmxZa3ATwFfBx3UJZWKqc5FeNnVhass5OvS4Dysi2KgvbfslIqI0TwuyJkIvBj_/s320/Busduct+Conductors+Arrangement+Image.JPG A closer view of the vertical bus duct showing the arrangement of the conductors inside Cables and busways A busbar trunking system comprises a set of conductors protected by an enclosure. Used for the transmission and distribution of electrical power, busbar trunking systems have all the necessary features for fitting: connectors, straights, angles, fixings, etc. The tap-off points placed at regular intervals make power available at every point in the installation. A busbar trunking is placed at the offices. http://www.electrical-installation.org/w/images/c/c9/FigE37.jpg Busbar trunking system design for distribution of currents from 25 to 4000A. The various types of busbar trunking Busbar trunking systems are present at every level in electrical distribution: from the link between the transformer and the low voltage switch switchboard (MLVS) to the distribution of power sockets and lighting to offices, or power distribution to workshops. http://www.electrical-installation.org/w/images/3/32/FigE38.jpg Radial distribution using busways at the offices There are essentially three categories of busways that we proposed for the commercial building, that is; 1) Transformer to MLVS busbar trunking Installation of the busway may be considered as permanent and will most likely never be modified. There are no tap-off points. Frequently used for short runs, it is almost always used for ratings above 1,600 /2,000 A, i.e. when the use of parallel cables makes installation impossible. Busways are also used between the MLVS and downstream distribution switchboards. The characteristics of main-distribution busways authorize operational currents from1,000 to 5,000 A and short-circuit withstands up to 150 kA. 2) Sub-distribution busbar trunking with low or high tap-off densities Downstream of main-distribution busbar trunking, two types of applications must be supplied: Mid-sized premises (industrial workshops with injection presses and metalwork machines or large supermarkets with heavy loads). The short-circuit and current levels can be fairly high (respectively 20 to 70 kA and 100 to 1,000 A). Small sites (workshops with machine-tools, textile factories with small machines,supermarkets with small loads). The short-circuit and current levels are lower (respectively 10 to 40 kA and 40 to 400 A). Sub-distribution using busbar trunking meets user needs in terms of: Modifications and upgrades given the high number of tap-off points Dependability and continuity of service because tap-off units can be connected under energized conditions in complete safety The sub-distribution concept is also valid for vertical distribution in the form of 100 to 5,000 A risers in tall buildings. 3) Lighting distribution busbar trunking Lighting circuits can be distributed using two types of busbar trunking according to whether the lighting fixtures are suspended from the busbar trunking or not. Busbar trunking designed for the suspension of lighting fixtures These busways supply and support light fixtures (industrial reflectors, discharge lamps, etc.). They are used in supermarkets, department stores and warehouses. The busbar trunkings are very rigid and are designed for one or two 25 A or 40 A circuits. They have tap-off outlets every 0.5 to 1 m. Busbar trunking not designed for the suspension of lighting fixtures Similar to prefabricated cable systems, these busways are used to supply all types of lighting fixtures secured to the building structure. They are used in commercial buildings (offices, shops, restaurants and etc.), especially in false ceilings. The busbar trunking is flexible and designed for one 20 A circuit. It has tap-off outlets every 1.2 m to 3 m. Busbar trunking systems are suited to the requirements of a large number of buildings. Industrial buildings: garages, workshops, farm buildings, logistic centers, etc. Commercial areas: stores, shopping malls, supermarkets, hotels, etc. Tertiary buildings: offices, schools, hospitals, sports rooms, cruise liners, etc. Examples of Canalis busbar trunking systems http://www.electrical-installation.org/w/images/3/39/FigE40.jpg Flexible busbar trunking not capable of supporting light fittings  : Canalis KDP (20 A) http://www.electrical-installation.org/w/images/5/5c/FigE41.jpg Rigid busbar trunking able to support light fittings  : Canalis KBA or KBB (25 and 40 A) http://www.electrical-installation.org/w/images/b/b3/FigE42.jpg Lighting duct  : Canalis KBX (25 A) http://www.electrical-installation.org/w/images/a/a5/FigE43.jpg A busway for medium power distribution: Canalis KN (40 up to 160 A) http://www.electrical-installation.org/w/images/5/52/FigE44.jpg A busway for medium power distribution: Canalis KS (100 up to 1000A) http://www.electrical-installation.org/w/images/4/47/FigE45.jpg A busway for high power distribution: Canalis KT (800 up to 1000 A) Trunking and Conduit System in Commercial Building https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLZK1xBaTbXZzz6U3-4FGphdbbSs0uweRQw2yhf8DqaMebh6tmUMAVYQ8u3Q1NI3VhBw2Im4915iLmOP95A2Re7urh42B4PcwLy0Bplz-FmgKQv1jHCcpo3YCzh6MW11LLwDM2ohhDP5mB/s320/Mechanical+and+Electrical+Coordination+Picture.jpg Conduit and trunking This picture shows how the electrical conduit and trunking installation should be coordinated with water pipes on the building. Trade subcontractors (water piping sub-contractors, electrical sub-contractors, telephone cabling contractor, computer network contractor and others) must not be allowed to proceed with the installation of their individual services and equipment on the first come, first served basis. Prior to the commencement of the installation works by trade sub-contractors, a set of proper coordinated drawings, endorsed by all relevant parties, should be made available to all the sub-contractors involved in a particular area. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhUQK8OngElRyRHROikKZdynnLfrn_Rblu8QKW7d4gsfsfm6rLFx2qquQgFofNMY_rQC2R5n5qygwsByEVTpDRw3E9nxRHlV3PJs5cEg8njX3RL8rnPs04ckl1mrDUggReARCgxgM4sE8Dx/s320/Below+Slab+Trunking+Installation+Photo.jpg Electric trunking running below soffit of a concrete floor slab There is no electrical installation work of a significant size can be done properly without the use of an electric trunking. A trunking is a larger size of a conduit. When you need to run a number of electric conduits along each other for a significant distance, then consider using a trunking in place of the conduits. There are so many sizes you can choose from. The above picture is an example of a trunking installation above ceiling level, under the soffit of the concrete floor slab. we also labeled some of the other services there for the benefit of those non-electrical readers who need pictures like this for reference, to know what is what among the myriads of pipes, conduits and trunking running above the ceiling level. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEglJy78rQZoTeRBWPNl6rBqZw_xC71vragWw4eryp36ZoCz11GMnoOEb_VLP0r6_dPmNztFI9RxaAtjD2p7H6VLn5nyEbDtbfBw_uStorVo92exPxSv2qoPO6CSIzqRkVKEW0iMhEK3LM5c/s320/Wiring+Trunking+Picture.jpg Electrical trunking in and out of the electric panels There are electrical trunking connecting the panels at above and below the panels. But the box-up walls have hid them. This picture is metal trunking. In future, the maintenance electrician would need to access and open the cover of the trunking in the repair and upgrading works. Therefore, a means of access is required, which was not provided at all at the mock-up unit. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhsv5G6bBvGnYsqhmx3LrUtyJW97-vV0GUGSqC76KMI8JGXmWF2l3K-K81CVGpYN_Sr0nYQnkddjcnPeqqnoxLfamzKk0m2ZcuNm7aeXo633Gc6aPdmZn3ZIJFBD4j0LxU4Q9v34Qia-K_b/s320/Underfloor+Trunking+Installation+Photo.jpg Under floor trunking installation The under floor trunking system has been around for a long time. An under floor trunking system is an alternative way of providing the dedicated routes to run electrical cables, telephone cables or any other wiring cables. An 11KV cable is not a wiring cable. A 25 sq.mm electrical feeder cable to supply an 11 KW fire pump panel is not a wiring cable. The 1.5 sq.mm cables that are used for wiring the office lights are categorized wiring cables. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh-IM4PCzIz2GmxUt6lPN2xOIreMOgzjQp-_rabH5Zi5dDy2R5AfTpWlalUx3S8o3jUgcmm8Wgk9F_1kBriKn8d6aJ8h_H4RgEmsuIoI96nhxchJVeiL_ZGF9aaSVoKlJQmrr-V7_OMPziU/s320/Surface+Conduit+Installation+Picture.jpg Surface conduits The conduits are used to protect the wiring cables that carry the electrical current. Electricity is dangerous. Even though the electric conductors that carry the current is insulated by some PVC covering materials or whatever, the covering material is not strong enough to protect the cable from damage. When the covering is damaged, the electrical conductor inside may be exposed to touch or it can also unintentionally come into contact with things that can carry electric current. This scenario would present a high risk of electric shocks. Therefore, we protect the electric cables so that they do not present the dangers of electric shocks to people (or animals). A second reason to protect the cables is to make sure the electrical system stays reliable. When the cable PVC covering is damaged, the conducting metal can come into contact with other metals that are in contact with earth. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgwSlJvDsO5hpwTIL2pSVUyY66Ukl2JxVjoWn2IiQBvDdenPDFf6RN3aC0FcXq4X2fkkrYArkLO0ro0Oxpu5Y3_lr8d-HGZwC90dqW9jyIkYZHTar0eNp-HiZNc0nBD_GCDiw7pzxd100Uj/s320/Overhead+Projector+Installation+Picture.jpg A motorized overhead projector The electrical contractor produced a mock-up unit of the installation bracket for motorized overhead projector. The overhead projector was for meeting rooms (offices level). There were about thirty units to be installed through the building. https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhzXsCejyCv8GiAl8uyGi32XsCofwr_hPzhNQdUget5XGF3xw7UQ-fMBQaMFSEa2M47cU1G8AArIH1IxmbV9ZgUoq3d5TbHGqD8lAJLEmd0cJj_MTMRTljnz2tywzLS3W8sgG9GVXxNuAp6/s320/Feeder+pillar+picture.jpg Compound lighting feeder pillar A building construction of significant size is usually not complete without at least one small outdoor weatherproof feeder pillar. High rise building electric closets https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj0nqcZV0NGWa4ZU6HYqngnsgREsN5Us9R0QjDC4bOItUN7eyHSvGyBmYy0c9zj-TLwo9F4dWvO4EM87kdKw4uAgN02VUyHe7mnWGFw4Y_D_euBrMAOXwSNjdoOdsktIxs1M2yiiM2DZgOt/s320/Electric+Closet+Picture.jpg Electric closet The electric closet in the following pictures has been done for a multi storey bui

The Atrocity Of War :: essays research papers

The Atrocity of War More than an end to war, we want an end to the beginning of all wars - yes, an end to this brutal, inhuman and thoroughly impractical method of settling the differences between governments (Franklin D. Roosevelt). In some people’s minds, war is glorified. The romanticized perspective that society bases war on is reversed in the book Catch-22. The Vietnam War established the book as an anti-war classic because of the war’s paradoxical nature. Heller perceives war as a no win situation. The book elaborates on the sane and the insane ways of the nation. The question is who is to determine the insane? It all comes back to the paradox that 'Catch-22' delivers. The trauma this book illustrates threatens the government’s ideal of peace. There was a time when Heller’s classic satire on the murderous insanity of war was nothing less than a rite of passage. Throughout the book it reveals a portrait of war that is the reality. The sarcasm and structure of this novel is Heller’s way to show the actuality of war’s dispair. The author exemplifies war as trivial; his characters are not fighting the enemy, but they are fighting within themselves. The world has known war ever since the beginning of time, but time has to change if the nation is going to prosper in a positive direction. In Catch-22 most of the sane characters put all of their time and energy into getting home. Yossarian, the main character in the book, was the most determined to stay alive. â€Å"The enemy,† retorted Yossarian, â€Å"is anybody who’s going to get you killed, no matter which side he’s on† (120). All around him he felt people were trying to kill him. His main fear was everyone, including his troops, were shooting at him. Yossarian informs, â€Å"They’re trying to kill me† (11). Everywhere he turned he thought people were after him. Even in the dining hall, he sensed the cooks wanted to poison him. With the trauma he went through nobody can blame him for being paranoid. Anything he could do to get out of missions he tried. The goal that he set was to go home alive, and he would do anything to achieve it. Never did he think twice about what duty he had to accomplish for his government. The whole objective in war is for innocent people to die. Not only did Yossarian fight to go home, but also he fought with the guilt he had to encounter for his lack of bravery. Nothing that he faced could stop him from leaving the war. Not only did he have to battle the constant fear of death, he also had to fight the

The Country of Libya Essay -- essays research papers

Libya Libya is a Country located in northern Africa, 90% of Libya’s land is covered by the Sahara Desert. There are no lakes or rivers, all of the country’s water supply is from underground. Libya is one of the largest countries in Africa, but largely due to its vast desert environment, the population is less than most of the other countries. Libya also has no water above ground, everything comes either from the ocean or the underground water systems that irrigate the underside of Libya. Libya’s flag is solid green, the only flag in the world with one colour and design, Libya also has a huge history of religions and cultured as well as some of the oldest architecture on the planet. Location Libya is located in Northern Africa along the Mediterranean Sea which provides a northern coastal border. On the east Libya borders Egypt and Sudan and on the west Libya borders Tunisia and Algeria. To the south Libya has Chad and Niger as neighboring countries. One may ask what type of relations that Libya has with these bordering countries. Libya occupies a very interesting position. Libya has a long history of great trade relations with these other countries. Trade between these countries has depended on two types of routes which are the â€Å"western† route and the â€Å"commercial† route. The commercial route is used every season and leads to Egypt and Saudi Arabia. Place Libya extends over 1,759,540 square kilometers (679,182 square miles), making it the 16th largest nation in the world. The climate is a mostly dry, desert climate. The northern regions however enjoy a milder Mediterranean climate. Geographic regions: Cyrenaica, Tripolitania, and Fezzan. The chief cities are the capital Tripoli in northwest Libya and Bengh... ...hat covers the body from the knees to the neck regardless of the temperature, which sometimes can go above 40 degrees C. Certain beaches especially for tourists are also available. All drugs and alcohol are banned and this applies to all visitors. Libya is one of the safest countries in the world since the crime rate is very low. You do not need to be concerned about your safety in Libya, although you may get lots of fascinated looks from the locals if you travel there. Arabic is the main language and English is the second language. Almost everyone in Libya can speak English. Conclusion Libya, though very dry and uninhabited, contains much history and ancient architecture. It is a very interesting country, and to think that that much land can be covered by flat desert is amazing. Libya is a well run country and very populated considering the conditions. The Country of Libya Essay -- essays research papers Libya Libya is a Country located in northern Africa, 90% of Libya’s land is covered by the Sahara Desert. There are no lakes or rivers, all of the country’s water supply is from underground. Libya is one of the largest countries in Africa, but largely due to its vast desert environment, the population is less than most of the other countries. Libya also has no water above ground, everything comes either from the ocean or the underground water systems that irrigate the underside of Libya. Libya’s flag is solid green, the only flag in the world with one colour and design, Libya also has a huge history of religions and cultured as well as some of the oldest architecture on the planet. Location Libya is located in Northern Africa along the Mediterranean Sea which provides a northern coastal border. On the east Libya borders Egypt and Sudan and on the west Libya borders Tunisia and Algeria. To the south Libya has Chad and Niger as neighboring countries. One may ask what type of relations that Libya has with these bordering countries. Libya occupies a very interesting position. Libya has a long history of great trade relations with these other countries. Trade between these countries has depended on two types of routes which are the â€Å"western† route and the â€Å"commercial† route. The commercial route is used every season and leads to Egypt and Saudi Arabia. Place Libya extends over 1,759,540 square kilometers (679,182 square miles), making it the 16th largest nation in the world. The climate is a mostly dry, desert climate. The northern regions however enjoy a milder Mediterranean climate. Geographic regions: Cyrenaica, Tripolitania, and Fezzan. The chief cities are the capital Tripoli in northwest Libya and Bengh... ...hat covers the body from the knees to the neck regardless of the temperature, which sometimes can go above 40 degrees C. Certain beaches especially for tourists are also available. All drugs and alcohol are banned and this applies to all visitors. Libya is one of the safest countries in the world since the crime rate is very low. You do not need to be concerned about your safety in Libya, although you may get lots of fascinated looks from the locals if you travel there. Arabic is the main language and English is the second language. Almost everyone in Libya can speak English. Conclusion Libya, though very dry and uninhabited, contains much history and ancient architecture. It is a very interesting country, and to think that that much land can be covered by flat desert is amazing. Libya is a well run country and very populated considering the conditions.

Valkire Movie Review

On April 7, 1 943, he was severely wounded at Subset en Annual, when Allied fight strafed his vehicle. He lost his left eye, right hand, and last two fingers of his eel Ft hand after surgery. Cool. Sternberg was sick of seeing Hitter's Nazi organization in rule of Germany so he took a big Step forward in his plan to Stop Hitter's journey tow awards success. In this part of the movie I wondered why Tom Cruise didn't have a accent while playing the role of a man from Germany. Cool. Sternberg joined the German resistance organization.This organization consisted of a group of en who were antihero and were constantly thinking and conspiring ways the could overthrow the Nazi government the guys in this group seemed really s mart but in the movie when Sternberg walked in the room were the men were, t hey seemed like they were unsure about what to do until Sternberg stepped in Cool. Sternberg meets General Beck and DRP. Girdler. Beck and Girdler are members of the resistances and are also so mewhat important to the German government. If the Valerie operation was a success, DRP.Girdler would have become the leader of Germany and General Beck would've became me the leader of Germany's armed forces. When Cool. Sternberg joins the resistance, he suggests that they should consider using operation Valerie. He takes charge, and agrees to govern this mission because he believed Valerie would be there only chance of stopping Hitler. I wished in the movie they would've explained the Valerie plan a little bit more in the beginning of the movie because it took me a while to fully understand it.The actual Valerie plan consisted of Hitter's assassination, to take control of the cities, take control away from AS, and lastly arrest the Men in charge of the Nazi organization. If Hitler was to be assassinated, this would allow the Germ people to no longer have be held under control. Cool. Sternberg believed hi destiny was to save the German people from the awful destruction that Hitler W as creating. Although Sternberg had a family, feel that his love for his country was so strong that he was willing to sacrifice everything for the greater good o f his country.Cool. Sternberg learns how to use pencil detonators and decides to use this as means to assassinate Hitler. Sternberg was promoted and was now able to attend to military meetings that Hitler would be attending; this was the per effect opportunity for Sternberg to go through with his plan. Cool. Sternberg an his assistant Hafted set out a plan that seemed perfect. Sternberg and Ha often attended a military meeting that Hitler would also be attending. At this meeting Sternberg and his assistant had everything in place.Cool. Sternberg and Hafted enter the hut, they go in a back room to arm the explosive. After Sternberg secretly armed the device, he put the bomb in his brief case and walked in the meeting were Hitler and his associates were located. At this poi NT of the movie a was so anxious to see if the plan would really work because at HTH s point of the movie, everything was going perfectly as planned As Sternberg enters the war room, he put his briefcase underneath the table on the side closest to Hitler.Hafted goes outside to get their getaway c As Sternberg eagerly stands in the room with the bomb counting down an d his Hitler rambling on, he receives his call that was used as a distraction and ticket t to leave the premises. While Sternberg is on the phone, Hitler is once again angered and hits the table with his fist, knocking over the briefcase. One of the men in the meeting notices Steadfastness briefcase on it's side so he picks up bag and moves it to the other side of the table, which was the opposite side oHitler. As Sternberg quickly but calmly existed the building, the bomb goes off. It was very loud and created very noticeable destruction. Sternberg WA sure that the target had been eliminated. While watching the movie at this pop you have no clue what really happen to Hit ler, but figured that since there w still a lot of time in the movie, something had to have went wrong. The director r of this movie did a great job creating suspense in parts of the movie.The camp was taken by surprise and the soldiers were ordered to put everything on Lockwood and that no one gets in or out. Sternberg, Hafted and here driver are quickly exiting the camp and come to a road block with soldier there, the soldiers explain that know one is get in or out but Cool Sternberg tricks the soldier by calling people who pose as a general and stating to the soldiers that it is important that Sternberg is able to leave. Flexible calls Queries and tried to explain what happen.But there was such poor receipt that Queries couldn't fully hear what happen, he just knew that the bomb had went off and that everything went as planned. All communications were then cut off. Queries tries to explain to Albrecht what happen but Albrecht wants to now for sure that Hitler is dead before he ac tivates the operation. Quirkier realizes that if Albrecht doesn't launch Valerie, everything will be set back an out of order. So Queries took it upon himself to mobile the reserve army without Albrecht even knowing.At this point, Albrecht understood that if he didn't activate it, Sternberg would have no chance of making it out alive. Operation Valerie put Albrecht, Sternberg and Beck in charge of the reserve army and they're ordered to arrest Everyone who was apart of the An sis's and the AS. As the reserve were placing their arrests, they go to the AS quarters, once they enter the headquarters, they Find Joseph Gobbles who is the minister. The communications from the camp were back and Gobbles ca lied Hitler while soldiers were ready to make the arrest.Gobbles gave the phone to the soldier and he here's Doll hitless a voice and then realizes that Hitler is in fact still alive. When this happen I was so shocked because I didn't think they would've been able to cancel Valerie after it already being in affect. People SST at the camp had been making rumors about Hitler but Sternberg just ignore deed them and explained to everyone that the rumors were fake, The soldier report deed to Major Reamer and Reamer cancels the operation in Berlin and is ordered to arrest the men in charge of this conspiracy.Cool Sternberg here's everything that people are saying about Hitler still being alive but he doesn't think anything of it because he is sure that Hitler is dead because he saw the blast go off. The reserve and AS Officers went to the resistance headquarters and they came to arrest Queries, Albrecht, Hafted, Beck and Sternberg. They all tried to escape and get into a shootout with AS officers. Cool. Sternberg is hi t and the rest of the men are caught. General From sentenced them all to death.

Improving The Design Of Buildings After 9 11 Environmental Sciences Essay

Following the terrorist onslaught on the New York World Trade Center in 2001, this paper seeks to look into the design features that would heighten the safety of tall edifices. Design/methodology/approach – Using a questionnaire, informations have been collected via electronic mails and by station from designers and civil applied scientists ( AEs ) in Singapore. Structured interviews were conducted with public governments. Findingss – The consequences show that AEs perceive tall edifices to be by and large safe in footings of structural design, fire safety characteristics and agencies of flight. The consequences besides show that AEs confirm the demand to better the safety of tall edifices further, are doing an attempt to turn to the heightened safety concern, will give full support to enterprises to turn to heightened safety concerns, will hold to carry on hazard appraisal during the design stage and will welcome a performance-based design codification. AEs do non hold that edifices should be designed to defy hydrocarbon fires or aircraft onslaughts. The study consequences further reveal that the four most effectual methods to better the safety of tall edifices are supplying issue marks with illuming at floor degrees, a separate design codification for super tall edifices, supplying fire safety and deliverance floors, and the decentalisation of fire systems. Originality/value – The importance of this paper is that it investigates the safety characteristics and steps that can cast some visible radiation on heightening the safety of tall edifices. The findings may be used by constructing governments to explicate future steps and codifications to better heighten the safety of tall edifices. Based on the findings, farther research on each executable method of bettering the safety of tall edifices may be undertaken. The unprecedented devastation of the New York World Trade Center ( WTC ) by terrorists on September 11, 2001 ( 9/11 ) signified new menaces to tall icon edifices and has led to heightened concerns over the safety facets of tall edifices. Present safety characteristics in tall edifices might be unequal in get bying with such hazards, particularly when current edifice design and building have concentrated on the more normal types of accidents and catastrophes that can bechance constructions and their residents. There may be a demand to do edifices more robust and to guarantee better protection for a edifice ‘s residents. After 9/11, some issues need to be addressed. For illustration, is it necessary to guarantee that edifices are capable of defying the sort of impact suffered by the WTC? In reevaluating the hazards to the built environment, should edifices be designed to defy aircraft onslaughts, or simply to guarantee that there is sufficient clip for the residents to evacuate before the edifice prostrations? The aims of this survey are: to look into how safe tall edifices are/should be ; and to analyze the feasibleness of assorted methods to better the design of tall edifices to do them safer. The positions of designers and civil applied scientists ( AEs ) and relevant edifice governments in Singapore were obtained through a questionnaire study and interviews. Singapore is a relevant state for this survey to be conducted because it is a little city state, where land is scarce, and tower block, high-density life is the norm. Singapore besides likely has one of the highest concentrations of tall edifices per hectare of land in the universe. The importance of this paper is that it investigates the safety characteristics and steps that can cast some visible radiation on heightening the safety of tall edifices. The findings may be used by constructing governments to explicate future steps and codifications to better heighten the safety of tall edifices. Based on the findings, farther research on each executable method of bettering the safety of tall edifices may be undertaken. Proposed methods to better safety of tall edifices To measure the deductions of 9/11, the USA and the UK edifice governments and other related authorities bureaus have established groups and undertaking forces consisting edifice experts around the universe. These groups and undertaking forces seek to place life-safety issues and suggest new methods to better the public presentation of future tall edifices and guarantee sufficient emptying clip for edifice residents. In planing edifices against menace, Mr Robert Prieto, of Parsons Brinckerhoff, Inc. , highlighted the three Rs of menace design: â€Å" Design to defy the menace. Design to react to the menace. Design to retrieve from the menace † ( Post, 2001a ) . From a literature reappraisal, some of the methods that have been suggested by applied scientists and practicians in an attempt to better the safety public presentation of tall edifices are summarized in Table I. Column 2 of Table I shows that there are 23 possible ways to better the safety of tall edifices. These are categorized into five chief headers: structural design ; fire technology ; agencies of flight ; stuffs engineering ; and codifications and ordinances. How executable these methods will be is still unknown and remains to be determined. Therefore, this paper aims to happen out the suitableness of these methods by proving them in the field. Methodology The survey comprised a sample study and structured interviews to garner the positions of AEs and edifice governments, severally. The intent of the study was to happen out AEs ‘ perceptual experiences of the safety of tall edifices in Singapore and the feasibleness of steps that could be adopted to better the safety degrees of tall edifices. The intent of the interviews was to analyze the edifice governments ‘ attempts in turn toing the safety of tall edifices after 9/11. A questionnaire was designed for the study. The first subdivision of the questionnaire sought to find the profile and demographic inside informations of the respondents. In the 2nd subdivision, respondents were asked to rate the safety degree of tall edifices in Singapore ( V1 to V4 ) on a ten-point Likert graduated table, where 1 denotes â€Å" really insecure † , 5 denotes â€Å" satisfactory † and 10 denotes â€Å" really safe † . They were besides asked to rate the ability of these edifices to defy accidents and onslaughts ( V5 to V6 ) on a five-point Likert graduated table, where 1 denotes â€Å" strongly disagree † , 3 denotes â€Å" neither agree nor disagree † and 5 denotes â€Å" strongly agree † . The respondents ‘ positions on the heightened safety concern and the critical issues related to 9/11 ( V7 to V16 ) were besides obtained utilizing the same five-point Likert graduated table. The 3rd subdivision sought to find the fea sibleness and pertinence of the methods uncovered from the literature reappraisal. Respondents were asked to bespeak whether they thought the proposed method should be adopted, non adopted, or were diffident. They were besides encouraged to notice and give grounds for their responses. The complete mail study bundle comprised a screen missive, the questionnaire and a stamped, self-addressed and envelope. Data for the study were collected via electronic mail, surface mail and telephone. AEs were targeted for the study because the work that they do is straight relevant to constructing safety. Eighty and 160 questionnaires were sent to randomly selected AEs in the public and private sectors, severally. Public-sector AEs were identified through the Singapore Government ‘s published directory. Private-sector AEs were obtained from Internet Yellow Pages ( 2002a, B, degree Celsius ) . Besides the study, structured interviews were conducted with authorities functionaries from the Building and Construction Authority ( BCA ) and the Fire Safety and Shelter Bureau ( FSSB ) . The intent of the interviews was to happen out their attempts in turn toing the safety of tall edifices. The BCA was selected because it is the chief regulator of Singapore ‘s building industry ( Building and Construction Authority, 2002a, B ) . The FSSB is the local authorization in fire safety and bomb shelter ordinances ( Singapore Civil Defence Force, 2002 ) . E-mails explicating the intent of the research were sent to the governments to bespeak permission to carry on the interviews. Agreements for the interview Sessionss were so made with interviewees who were involved in the reappraisal of edifice safety after 9/11. Survey consequences and informations analysis Thirty-four questionnaires were received, giving an overall response rate of 14 per centum. The public sector response rate ( 28 per centum ) was higher than the private sector response rate ( 8 per centum ) . The good response rate from public-sector respondents may be because the several Human Resource Departments agreed to administer the questionnaires. The low response rate from the private sector respondents may be because these AEs felt that their chief duty is to follow the design codifications, and it is up to the authorities to alter the codifications. To increase the response rate, phone calls were made to the AEs to bespeak their engagement. Unfortunately, some of the mark respondents were normally busy or administrative staff were loath to set the calls through. The profile of the respondents is summarized in Table II. It can be seen that the bulk of the respondents held senior places in their organisations. The bulk of the respondents were applied scientists, and many of them were from the public-sector lodging authorization. Furthermore, the bulk of the respondents ( 79 per centum ) had worked in the building industry for more than five old ages. This would do their feedback more accurate and dependable. Almost all the respondents ( 88 per centum ) had been involved in the building of tall residential edifices. The public-sector respondents focused more on residential edifices, while the private-sector respondents were more involved in tall commercial edifices. We now describe the profile of the interviewees. The interviewee from the BCA was a senior director who had a civil technology grade. Prior to fall ining the BCA, he had worked in the building industry for 25 old ages and was involved in the building of major substructure and edifice undertakings. The FSSB interviewee held a sheepskin in stuffs and measures in add-on to his civil technology grade. He had worked in the FSSB for more than 15 old ages and was involved in reexamining the Fire Code. The positions of these capable affair experts ( SMExperts ) were incorporated in the relevant treatment subdivisions. Datas were entered into the Statistical Package for Social Sciences ( SPSS ) package for analysis. Average evaluations for all the variables were calculated ( Table III, column 3 ) . A one-sample t-test of the mean was carried out to look into whether the population would hold with the variables surveyed. For variables V1 to V4, the void hypothesis ( H 0 ) that tall edifices are regarded as insecure and the alternate hypothesis ( H 1 ) that tall edifices are regarded as safe are set out as: H 0. I?a†°Ã‚ ¤5. H 1. I? & gt ; 5. I? is the population mean, and is taken as 5 on a ten-point evaluation graduated table. For variables V5 to V16, the void hypothesis that respondents disagree with the variable and the alternate hypothesis that respondents agree with the variable are set out as: H 0. I?a†°Ã‚ ¤3. H 1. I? & gt ; 3. The degree of significance ( I ± ) was set at 0.05. If the deliberate p-value is greater than or equal to 0.05, H 0 is non rejected and the consequence is non important. If the p-value is less than 0.05, H 0 is rejected and the consequence is important beyond the 5 per centum degree. The consequences are shown in Table III ( columns 4 and 5 ) . An independent samples t-test was carried out to find whether the public and private sector respondents shared the same positions on the variables surveyed or otherwise. The degree of significance ( I ± ) was besides set at 0.05. The nothing and alternate hypotheses are: H 0. I? public=I? private. H 1. I? publica†° I? private. When H 0 is non rejected, it is concluded that there is no difference in the average evaluations by both sectors. The rejection of H 0 agencies that both sectors of the building industry have differing positions with regard to the variable being tested. Levene ‘s Test was used to look into for equality of discrepancies between the two groups of respondents ( Gray and Kinnear, 1997 ) . It was found that there was no important difference, and hence a pooled estimation of the population discrepancy was used. The consequences of the t-test of the difference between agencies are given in Table III ( columns 6-9 ) . The consequences show that there is no important difference between the positions of public and private sector respondents except for point V16. In point V16, both public and private sector professionals disagreed that tall edifices should be designed to defy aeroplane onslaughts, but private sector professionals disagreed to a greater extent. In the 3rd subdivision of the questionnaire, the respondents indicated whether a suggested step should be implemented ( agree ) , non implemented ( disagree ) or they are diffident about its pertinence in bettering the safety of tall edifices. The consequences are shown in Table I ( columns 4-7 ) . The four most popular methods are: supply issue marks with illuming at floor degrees ; supply a separate design codification for ace high-rise edifices ; supply fire safety and deliverance floors ; and supply a decentralized fire system. These consequences are now discussed. How safe tall edifices are/should be The one-sample t-test consequences ( Table III ) show that in general, the respondents are of the sentiment that tall edifices in Singapore are safe ( V1 ) . They besides have more than equal structural design ( V2 ) , fire safety ( V3 ) and means of flight ( V4 ) . Among the four safety appraisal of tall edifices, the average safety evaluation for structural design is highest at 7.88. Respondents felt that this facet of the edifice is the most earnestly considered in guaranting the safety of edifices. In add-on, tall edifices will be able to defy normal accidents ( V5 ) , but will fall in upon an aircraft onslaught ( V6 ) . The above consequences may be biased towards the sentiments and perceptual experiences of the respondents. This is because the population surveyed is likely to react that edifices are safe because they are involved in the design procedure, and stating that a edifice is insecure brings into inquiry their design patterns. In add-on, a big per centum of public functionaries responded to this study. These public functionaries can non be seen to hold no assurance in the safety of tall edifices when they have a responsibility of attention to normal citizens. Of the 10 steps proposed ( V7-V16 ) , six ( V7, V9, V10, V11, V13, V14 ) are significantly of import ( p & lt ; 0.05 ) . Respondents felt that there is a important demand to better the safety of tall edifices ( V7 ) . Consistent with this response, the respondents disagreed that tall edifices do non necessitate extra safety steps ( V12 ) . This shows that there is room for betterment and supports the demand to heighten edifice safety. Respondents felt that they have the expertness to better the safety of tall edifices ( V9 ) . The findings are promoting. It shows that AEs have the proficient capableness to do tall edifices even safer. The respondents besides agreed that they have made an attempt to turn to the heightened safety concern ( V10 ) . In add-on, they will give fullest support to the building industry to turn to the safety of edifices ( V11 ) . However, this issue is non their chief concern ( V8 ) , possibly because the tall edifices are already structurally safe ( V2 ) . Respondents agreed that there is a demand for hazard appraisals to be conducted on tall edifices during the design stage ( V13 ) . These hazard appraisals will help edifice interior decorators in placing the likely menaces faced by edifices ( Broughton, 2002 ; Linn, 2002 ) . Buildings are so designed to turn to the menaces to heighten their safety public presentation. Respondents besides agreed that a performance-based codification might supply better safety counsel than the normative codification for tall edifices ( V14 ) . The SMExperts revealed that the governments have already recognized the demand for a performance-based codification because it offers more flexibleness to interior decorators. For alone edifices such as airdromes and large-sized indoor bowls, interior decorators may non be able to use the conventional normative codifications straight. The findings show that respondents are opposed to planing edifices to defy hydrocarbon fires ( V15 ) and aircraft onslaughts ( V16 ) . This may be because it will be excessively expensive to construct such constructions, when the menace is improbable and unpredictable. SMExperts confirmed that edifices are designed based on possible burden events and believable jeopardies. Aircraft onslaught is non a sufficiently believable jeopardy to be considered in the design of edifices, and therefore edifice codifications do non necessitate that such events be considered for edifices in Singapore. The deduction is that edifices may non defy such utmost impact, particularly in the presence of the resulting fires because these constructions have non been designed for such menaces. SMExperts emphasized that it is more executable to concentrate on other signifiers of menaces such as truck and handheld bombs, which are physically transported by human existences. Resources should be directed towards air power and other security steps instead than to beef uping edifices against aircraft impact. Fire in edifices is a believable jeopardy which has been addressed in most edifice design. Harmonizing to the SMExperts, if edifices are improbable to see any menace posed by jet fuel, edifices need non be designed to defy hydrocarbon fires. How to plan safer tall edifices A ranking of the feasibleness of the proposed methods, based on the per centum of respondents who agreed with the method, is shown in Table I ( column 7 ) . For the intent of this survey, a proposed method is considered executable to do tall edifices safer when more than 50 per centum of the respondents agreed with it. Twelve methods are found to be executable and are discussed in the undermentioned subdivisions. Structural design Four possible methods to better the safety of tall edifices through structural design were proposed. One of these was found to be acceptable by more than 50 per centum of the respondents ( see Table I ) . The bulk of the respondents agreed with hardening of stairwells ( point 1.3 ) against blast impact. Strong stairwells are of import because flight stairwaies are the chief agencies by which edifice residents evacuate from edifices in an exigency. Existing codifications normally permit the usage of dryboards and masonry for stairwell enclosures, and these are susceptible and more prone to damage. This will do flight stairwaies to be blocked by fallen stuffs from stairwell walls. Reinforced concrete walls will hold higher opportunities of lasting a blast onslaught. It is recommended that codifications be changed to indurate stairwells. The bulk of the respondents did non hold with supplying prostration floors ( point 1.1 ) , which would be provided between, say every 10 floors, to transport the weight of the dust of the floors that prostration above it, and act as a arrest to progressive prostration ( Lane and Clark, 2001 ) . Some respondents felt that prostration floors impose significant structural demands ; for illustration, closely separated columns of larger sizes may be necessary. The bulk of the respondents did non hold with the proviso of a sacrificial facade ( item 1.2 ) . In this system, there is an exterior wall, a perpendicular air pocket behind it and another structural wall indoors. The exterior wall is designed to absorb blast impact and contain harm, and act as a first line of defense mechanism for the edifice ‘s structural unity ( Nadel, 2002 ) . Some respondents felt that this system may give architectural the look of edifices and blockade the positions of the residents. Furthermore, the facade may necessitate to be spaced far apart from the internal wall for effectivity, and this would take up valuable infinite. Respondents besides did non hold that heavy tonss should non be allowed on roofs ( point 1.4 ) . In the WTC towers, heavy tonss were placed on the roofs to stabilise the edifices ‘ wind-induced sway, but these could be a conducive factor to the prostration ( Building, 2001b ) . Some respondents felt that it is the norm to use rooftop infinite to house works and equipment such as lift motor suites and H2O armored combat vehicles, and interior decorators may confront the job of re-siting edifice services if rooftop infinite is non utilised. Furthermore, for practical grounds, some M & A ; E systems rely on gravitative force per unit area to work. Fire technology Four possible methods to better the safety of tall edifices through fire technology were proposed. Three of these were found to be acceptable by more than 50 per centum of the respondents ( see Table I ) . Astaneh-Asl ‘s ( 2002 ) probe of the WTC prostration revealed that the firefighting systems were centralized at the stairway nucleus. This bunching together of the services meant that when that location was hit, the whole firefighting system may hold failed. He hence recommended that sprinkler pipes, moisture and dry risers should be decentralized, and placed at different locations of the edifice. Respondents agreed with the method ( item 2.3 ) , but some cautioned that this would take to increase in cost. A sum of 61 per centum of the respondents agreed that supplying burden detectors ( point 2.4 ) is executable, and may increase the safety of tall edifices. Load detectors can be used to understand and supervise edifice behaviour. Prompt action could be taken and exigency forces alerted one time information is fed to the monitoring system. Furthermore, burden detectors, if decently developed, are utile tools in supplying warning signals to determine whether edifices are safe for entry during an exigency event. This would supply better protection to firemans and exigency forces, as they are able to measure the hazard of partial or entire prostration of a edifice under menace. A sum of 53 per centum of the respondents agreed that supplying a separate firemans ‘ stairway is executable ( item 2.1 ) . In the WTC incident, firemans running up the stairwells rushed headfirst into office workers who were hotfooting down on the same steps ( Post et al. , 2001 ) . Respondents who objected to a separate firemans ‘ stairway argued that the current fire codification already has a dedicated lift for usage by firemans. The infinite required for a firemans ‘ stairway might be indefensible as this reduces salable infinite and may imply excess building and care costs. One respondent questioned how edifice residents could be prevented from utilizing this stairway during an exigency. Respondents did non hold to planing redundancy in fire systems ( item 2.2 ) . This may be because excess standpipes for firefighting, separate fire pump suites, excess sprinkler systems, excess fire dismay systems, and double fire bid Centres will necessarily take to be addition. Some respondents weighed the pertinence of this method against cost effectivity, long-run care, cost and clip of installing and other options. Meanss of flight Nine possible methods to better the safety of tall edifices through agencies of flight were proposed. Six of these were accepted by more than 50 per centum of the respondents ( see Table I ) . A sum of 63 per centum of the respondents agreed that wider stairwaies might be necessary for tall edifices ( item 3.3 ) because these could suit more people to rush up emptying. Unfortunately, wider stairwaies would increase cost and cut down gross due to reduced salable floor infinite. There is besides debate sing cut downing the standard breadths of stairwaies because there is rarely a demand to evacuate the whole edifice at one clip, as normally merely occupants on stray floors in the affected country demand to be evacuated ( Post and Angelo, 2001 ) . Supplying issue marks with illuming at floor degree ( item 3.4 ) received the most support from the respondents. Well-marked and lit marks are cardinal constructing design characteristics that facilitated the emptying of many edifice residents at the WTC Towers ( Federal Emergency Management Agency/American Society of Civil Engineers, 2002 ) . Such a safety characteristic would hold the extra advantage of assisting residents in following flight paths if they have to creep on the floor. However, certain issues need to be addressed, such as the care of issue marks near floor degree, which are capable to more wear and tear and hooliganism. The construct of fire safety and deliverance floors is appealing to the respondents ( point 3.5 ) . Fireproof refuge countries can harbor people in the center of an emptying and service as deliverance points ( Post, 2001a ) . These countries should non incorporate furniture, and are designed to be wholly fireproof. Some respondents commented that proprietors may non hold to supply these countries as they can non bring forth gross but alternatively incur care costs. A sum of 58 per centum of the respondents agreed to the proviso of extra stairwaies in tall edifices ( item 3.6 ) . Similarly, some respondents are concerned about infinite and cost. Some suggested that the figure of stairwaies be increased merely at lower floors to provide to the big Numberss of falling residents from upper floors. This could forestall congestion and easiness emptying, peculiarly in exigency instances affecting mass emptying of residents. This suggestion is a good via media between cost and safety. Fifty-six per centum of the respondents perceived sky Bridgess to be executable in edifices ( item 3.8 ) . Besides being an alternate flight path, sky Bridgess could function as normal entree between edifices. Twenty-six per centum of the respondents did non favor sky Bridgess in position of the possibility that the construction of the sky Bridgess might be affected when a edifice was under menace. Besides, sky Bridgess could be a agency to let the spread of fire to the other edifice. A sky span that is overloaded with escapees may fall in, doing more human deaths. Some respondents, peculiarly designers, were concerned about the aesthetics of edifices. Seventy per centum of the respondents agreed that rooftop helipads could increase the safety of tall edifices ( item 3.9 ) because residents trapped in the upper floors of tall edifices can be rescued. However, there is a bound to the figure of residents that can be rescued utilizing choppers. This construct may besides be impractical because the human inclination is to fall instead than go up to upper floors during exigency events. Furthermore, deliverance by choppers requires particular deliverance squads and accomplishments, which might non be readily available. The bulk of the respondents did non hold that fireproof lifts ( point 3.1 ) would heighten the safety of tall edifices. The chief concerns are the supply of electricity to power lifts, the demand to protect against power failure during fire, and agencies of flight if lifts fail. Some respondents pointed out that big crowds waiting at lift anterooms may do pandemonium during emptying. However, some respondents suggested that lifts are utile to evacuate the disableds, the aged and kids. Mr Jeremy Hodge, of Building Research Establishment Ltd, believed that another reply to get awaying to safety is the installing of flight chutes, which would non take up much room but would enable people to skid to the bottom really rapidly ( Lane, 2001a ) . In this survey, half the respondents felt that flight chutes were executable ( item 3.2 ) . Respondents suggested that the stuff used for the flight chutes must be fire-retardant and lasting, particularly if the system is deployed out in the unfastened. Escape chutes functioning single floors might be more efficient, and the issue points of the chutes must be decently controlled. Of the respondents that did non hold to this method, some felt that this flight means is non suited for the aged and kids. Skiding down from great highs entails high kinetic energy, and people may be injured when residents collide into one another during the sliding procedure. The bulk of the respondents besides did non hold with inward emptying ( item 3.7 ) . The chief ground for the expostulation is that residents might be trapped in the edifice. Furthermore, the human inclination would be to fly an onslaught site and people would be unwilling to wait inside a damaged edifice to be saved ( Post, 2001a ) . This expostulation by Singapore respondents is surprising because Singapore already has in topographic point an inward emptying system, in the signifier of bomb shelters being built in each high-rise flat. Behaviour of stuffs under utmost temperature Three possible methods to better the safety of tall edifices through improved stuffs engineering were proposed. None of them were considered executable by the bulk of the respondents ( see Table I ) . Blast-resistant glazing may cut down casualties originating from winging glass in the event of a blast ( Madine et al. , 2001 ) but less than 50 per centum of the respondents agreed with utilizing it to better the safety of tall edifices ( item 4.1 ) . Some respondents questioned the extent of protection, particularly in the event of an aircraft or bomb onslaught. One school of idea is to beef up window systems by cramping their corners, so that glass is more hard to interrupt ( Madine et al. , 2001 ) . However, the respondents in the present survey did non hold with this ( item 4.2 ) . One respondent warned of the possibility of over design with immense connexion inside informations, when the beef uping consequence may be limited. Madine et Al. ( 2001 ) suggested adhering the glass into window frames for greater strength as the blast burden could be transferred to the construction of the edifice. Again, respondents were non agreeable to this ( item 4.3 ) . Some respondents considered blast-resistant glazing more effectual than adhering the glazing into window frames to control blast impact, as the strength of glass panel itself is more important. There might be troubles in building and assembly of such Windowss, in position of factors such as thermic consequence and enlargement articulations. Codes and ordinances Three possible methods to better the safety of tall edifices through amendments of codifications and ordinances were proposed. Two of these were accepted by more than 50 per centum of the respondents ( see Table I ) . Respondents did non hold to the infliction of a height bound on edifices ( item 5.2 ) . This is consistent with old surveies ( Angelo, 2001 ; Forgey, 2001 ; Galloway, 2001 ) . In land-scarce metropoliss, holding rigorous height bounds does non let the optimum usage of land. A height bound imposed on a edifice may forestall developers from maximising returns on investing. The bulk of the respondents agreed that codifications may necessitate to be revised to supply for longer flight clip ( item 5.1 ) . Some respondents said that when stipulating the flight clip several factors have to be considered, such as flight waies and obstructors, occupant features ( aged, kid, handicapped, etc. ) and the location of the last individual to get away from the edifice, whether this individual is on the highest floor or at the remotest location in the edifice. It was suggested that the flight clip, if implemented, should bind in with the fire structural demands of edifices. Seventy-nine per centum of the respondents agreed that a really tall edifice should hold a separate design codification ( item 5.3 ) . The chief ground is its possible as a mark for terrorists and a long emptying clip ( Post et al. , 2001 ) . Having a separate design codification may be a good via media between safety and cost, since the codification allows a high appraisal attack to constructing design. The SMExpert from the FSSB said that his organisation has programs to revise the Fire Code every five old ages. Code demands will be refined and amended to take likely terrorist menaces into consideration. Any lacks in edifice demands that may allow terrorist Acts of the Apostless will be identified, and betterments made. The FSSB will besides implement a codification of behavior for firemans in measuring the fortunes for them to come in a edifice under menace. In the USA, security-related codifications and criterions are besides being reviewed ( Ichniowski, 2001 ; Lane, 2001b ; Maas, 2001 ; Pearson, 2001b ) . Decision In the wake of 9/11, the issue of safety in tall edifices was brought into greater focal point. In measuring the safety of tall edifices originating from the 9/11 incident, this survey sought the positions of AEs and edifice governments in the building industry in Singapore. While the respondents in this survey in general perceived tall edifices in Singapore to be safe, there may be sample prejudice because the respondents were involved in the design of edifices and many are public functionaries. Notwithstanding this, with rigorous authorities ordinances, all edifice designs reference functionality, lastingness and fit-for-purpose affairs. The governments interviewed attributed the good safety records of edifices to strict conformity with edifice codifications and an efficient firefighting squad. Notwithstanding this, AEs felt that it is of import to farther better edifice safety ( V7 ) . This survey besides found that edifices in Singapore can defy normal edifice accidents, but are likely to fall in upon aircraft onslaught. This paper found that AEs ( see Table III ) : have the necessary expertness to better edifice safety ( V9 ) ; are doing an attempt to turn to heightened safety concerns ( V10 ) ; will give full support to enterprises to turn to heightened safety concerns ( V11 ) ; agree to carry on hazard appraisal during the design stage ( V13 ) ; and will welcome a performance-based design codification ( V14 ) . These findings indicate that the attack to constructing design may hold to alter after 9/11. While bing designs are equal, respondents besides felt that extra safety steps are necessary ( V12 ) . However, there is no demand to overreact to the point of guaranting that all edifices can defy hydrocarbon fires ( V15 ) and aircraft onslaughts ( V16 ) . The paper contributes to knowledge by bring outing that the four most effectual methods to better the safety of tall edifices are supplying: issue marks with illuming at floor degrees ; a separate design codification for super tall edifices ; fire safety and deliverance floors ; and decentalisation of fire systems. Eight other steps were besides found to be executable ( see Table I ) . A height bound on edifices and limitation of burdens on roof are the most unwanted steps. Future surveies on bettering the design of tall edifices may do usage of these findings. It is recommended that farther surveies into the strength decrease of stuffs subjected to intense fires should be carried out. This is because constructions may be able to defy the impact of aircraft onslaught, but may finally neglect after a decrease in their stuff belongingss with lifting temperature. While many of the methods proposed may be able to better the safety of edifices, increased cost is a critical concern ( Leftly and Lane, 2001 ) . Before the alterations materialize in the codifications, it is necessary to find whether the building industry is able to absorb the new steps and whether AEC professionals and clients are convinced of the demand to beef up edifices further. Safety steps proposed must be practical without doing edifice proprietors bear unneeded costs. Besides seeking to do edifices stronger by supplying redundancy or more back-up beds, it is recommended that the relevant parties explore and detect new agencies to contend fire. Finally, it is of import to look at edifice safety as a whole system alternatively of supplying bit-by-bit back-up beds or increasing the border of safety. Ultimately, each edifice may hold a alone solution depending on factors such as cost, infinite, proficient, economical and political issues. A balance between realistic costs and highly improbable events should be maintained. Table IPossible methods to better the safety of tall edifices Table IIProfile of respondents Table IIIResults of study and statistical trials

Opposition to The New Deal Essay

The New Deal, it’s many Administrations and their policies were making major changes to American Industry and society. As a result of this, some people were quite unhappy and attempted to stall The New Deal. As time went on, FDR’s gained more and more power over the reformation of the American economy and businesses. People feared the amount of power FDR had and started questioning his intent. What really caused people to question Franklin D. Roosevelt was his attempt to â€Å"fix† the Supreme Court. As the nine judges making up the court were mainly old and conservative, FDR believed they were too opinionated and too eager use their authority without considering the consequences. Therefore he decided it wise to request he appoint up to six new, open-minded judges. Some people saw this as FRD attempting to tamper with the constitution in order to give himself more power, and it scared them. It was mainly because of this reason that FDR’s request was turned down, but the judges certainly seemed to have got the point and from then on were a lot more careful. Republicans certainly disliked The New Deal and found it dangerous. Leading Republican, Frank Knox, summed up Republican views on The New Deal by saying â€Å"The New Deal candidate has been leading us toward Moscow†. By this he meant that with Roosevelt’s increasing powers and his guidance and control over industry it seemed that he was slowly but surely verging towards communism. They also disliked Roosevelt’s industrial laws because they took power of the owners and benefited the workers with policies such as trade unions and social security. Some extreme opposition came from a self-educated man with a degree in law after only 8 months – he was a â€Å"shameless politician with no morals† and he fought dirty. In order to get where he was he had fixed ballots by placing his own men at available posts in the state government, he had used blackmail and bribery to get votes. Sometimes opponents were as much as kidnapped on Long’s orders. Huey Long became US senate in 1930 and claimed that if he were to become president he would adopt the policy of confiscating any personal fortunes of over 3 million U.S dollars and giving $5000 to each and every less wealthy family. Long did not at any point explain how he would do this, but the idea of much needed money being given to them for nothing was jumped at by the poorer families, and Long gained a lot of support. Fortunately for FDR, Long’s career ended due to assassination before he was able to challenge him. So with certain aspects of luck, and a well-conducted New Deal, FRD managed to rescue America from its depression without any great hitches. There were careless flaws such as the move Roosevelt made trying to fix the SC without considering the consequences, but in the end all went to plan and opposition was only opposition, and not a threat to the New Deal.

Digital Media

Introduction: You may have heard of digital media, but you may have no idea what it is and how it can help you out when it comes to marketing. It's definitely important that you get up to speed so you can use this to benefit your business. Basically digital media refers to any type of electronic media out there. Today media can be accessed in many ways, including with hand held devices like mobile phones, laptops, desktops, mp3 players, and more. Digital media must be stored in an electronic way, so there is a lot of digital content on the internet today, including text content, pictures, audio content, as well as video content.Through the history of internet, digital media has been developing in various ways. Here's we'll take a look at how it has affected the Internet and ways that it may be integrated moving forwards (Rogers 2006). One type of digital media is text; this in fact represented the very first explosion of  this  type of content  out there on the Internet. When t he Internet first got big, there was an explosion of content on the web, especially with all the text editors and word processing options out there today (Rogers 2006).Larger companies started to put date on computers instead of storing it in cabinets, and the internet definitely allowed a great way to share, transfer, and store content as well. As the Internet grew, images began to appear. Instead of just text emails, soon people could send photos, and soon photo sites for sharing photos began to pop up. Then in the middle 1990s, audio began to become an important part of digital media with the mp3 files that could be easily used. Soon music and more was shared online with sites that allowed you to share audio.Last in the digital media development was video. YouTube definitely made video sharing a hugely popular form of modern media distribution and this is continuing to grow as we speak today. Now with new technology seen in things like the iPhone,  this new form of virtual medi a  is available in handheld devices as well, and no doubt  this sector  is only going to continue to grow in the future (Rogers 2006). Now that you understand a bit more about the technology side, you may be wondering how it can help your business.Well businesses are using digital media for marketing more and more today, realizing that there is a huge marketing field out there and that  it can help to draw in visitors and can even provide better search engine visibility with you. Text content can be kept updated on your site and helpful content is a great part of good marketing. Expertise in your field can really help your business and get traffic flowing into your business website. Photos, charts, diagrams, and models are always popular online and will help you to get more visibility as well.Audio allows you to use music on pages or to do podcasts for your business. Creating videos is a popular method of digital media marketing today, and videos do very well in search engin es (Rogers 2006). With the popularity of digital media, it is definitely important that you continue to create and use it for good marketing and business results. Even if you have to hire someone to help out, the benefits will make it worth the money. So knowing about and using digital media is definitely important for your business success todayProblem statement: Most people accept the idea that the media can influence people. But the degree of that influence, as well as who is most-impacted, when, how and why, have been the subjects of great debate among communication scholars for nearly a century. Media effects refers to the many ways individuals and society may be influenced by both news and entertainment mass media, including film, television, radio, newspapers, books, magazines, websites, video games, and music.To understand digital media effects, it is first critical to consider how media are used and for what purposes. Communication scholars have traditionally fallen into tw o camps – functionalists, who believe the media audience tends to be in control and active, and critical/culturalists who believe the audience has less control and is therefore more passive. The balance may lie somewhere in the middle and may vary from country to country. Purpose of the study: In this paper we are going to study and evaluate the digital media and its effect on children in general.The following text is a general idea: Youth spend an average of ;7 hours/day using media and the vast majority of them have access to a bedroom television, computer, the Internet, a video-game console, and a cell phone. In this paper we review the most recent research on the effects of media on the behavior and health and well-being of children and adolescents. Studies have shown that media can provide information about safe health practices and can foster social connectedness.However, recent evidence raises concerns about media's effects on aggression, sexual behavior, substance use , disordered eating, and academic difficulties. We provide recommendations for parents, practitioners, the media, and policy makers, among others, for ways to increase the benefits and reduce the harm that media can have for the developing child and for adolescents. More than 50 years of media research attests to the significant influence of media on child and adolescent health.Both â€Å"old† media (television, movies, magazines) and â€Å"new† media (the Internet and social networking sites, video/computer games, cell phones) can have an impact on virtually every health concern that practitioners and parents have about young people, including aggressive behavior, risky sexual behavior, substance use, and disordered eating. Although the media are not the leading cause of any of these problems, the research reviewed here suggests that they are significant.Yet, despite the evidence of potential harm, there is also evidence that media can be beneficial for youth (eg, by increasing empathy and acceptance of diversity through modeling of prosocial behaviors and developing children's early literacy skills through educational programming). Those concerned with child and adolescent health need to be aware of the research on the effects of modern media on youth. Theoretical framework: Literature review: Media affect youth not only by displacing time they spend doing homework or sleeping but also by influencing beliefs and behaviors.According to social learning theory, children and adolescents learn by observing and imitating what they see on the screen, particularly when these behaviors seem realistic or are rewarded. Cognitive development theory asserts that children's cognitive capacities at different stages determine if and how they understand media content. For example, children younger than 8 years who are not yet able to comprehend persuasive intent will be more vulnerable to advertising.In addition, media present youth with common â€Å"scriptsâ €  for how to behave in unfamiliar situations such as romantic relationships. Finally, superpeer theory states that the media are like powerful best friends in sometimes making risky behaviors seem like normative behavior. With the variety of theories suggesting a potentially powerful effect of the media and the growing empirical evidence for negative impact, one might hypothesize that parents would take care to limit exposure to detrimental media content.However, the â€Å"third-person effect† (a well-documented phenomenon in the communications literature) shows that teenagers and adults think that the media influence everyone except themselves or their children Violence and Aggression By the age of 18, the average adolescent will have seen an estimated 200 000 acts of violence on television alone. Much of the violence on television and in movies is presented in a sanitized and glamorized fashion, and in children's programming it often is presented as humorous.More than 1 0% of 10- to 14-year-olds saw 40 of the most violent movies in 2003. Both music videos and rap music have become increasingly violent. Interactive media can encourage antisocial beliefs and behavior in children and adolescents, particularly because violence in new media has been found to be prevalent as well. A recent analysis of video games revealed that more than half of all games contain violence, including ;90% rated as appropriate for children aged 10 years and older.Health professionals worry most about first-person shooter video games. In the aftermath of the West Paducah, KY school shooting, it was discovered that the shooter had never fired a real gun in his life before that day, yet his marksmanship was both accurate and lethal. Researchers believe that repeated exposure to mediated violence can lead to anxiety and fear, acceptance of violence as an appropriate means of solving conflict, and desensitization, with resulting increases in aggression and decreases in altruism. In particular, the portrayal of justifiable violence that is common in American media—â€Å"good guys versus bad guys†Ã¢â‚¬â€places children at risk because it is so powerfully reinforcing. The relationship between media violence and real-life aggression is nearly as strong as the impact of cigarette smoking on lung cancer not everyone who smokes will get lung cancer, and not everyone who views media violence will become aggressive themselves. However, the connection is significant. The most problematic forms of media violence include attractive and unpunished perpetrators, no harm to victims, realism, and humor. SexResearchers investigating the impact of exposure to sexual content in media on adolescent sexual beliefs and early sexual initiation have found modest but significant associations, particularly in the realm of pornography. In a national sample of 1500 10- to 17-year-olds, nearly half of the Internet users had been exposed to on-line pornography in the prev ious year. In a sample of middle-school youth, exposure to sexually explicit (X-rated) content predicted perpetration of sexual harassment (for males), more permissive sexual norms, having oral sex, and engaging in sexual intercourse while in high school.Longitudinal studies now exist that have linked heavy exposure to sexual content in mainstream media with more rapid progression of sexual activity, earlier coital behavior, greater risk for and unplanned pregnancy, and sexually transmitted disease. One explanation for this relationship may lie in the role of the media as a â€Å"superpeer† that gives adolescent audiences a consistent message that sex is normative and risk free. In addition, media play an important role in providing sexual information to adolescents in the United States and in shaping their beliefs about how males and females behave in romantic relationships.Television shows geared toward teenagers actually have more sexual content than adult-oriented shows, yet there is little mention of the need for contraception or for responsibility. Virtually every Western country makes birth control available to adolescents, including allowing birth control advertisements in the media, but the major US television networks balk at airing ads for contraception. This flies in the face of the fact that a substantial body of evidence shows that giving teenagers’ access to condoms does not lead to earlier sexual activity.Parents and child advocates often express concern over children connecting with strangers on-line. Although there have been disturbing cases of Internet sexual predatory activity by adults on children, most recent studies of Internet safety have suggested that sexual solicitation of minors is more likely to occur by other minors. Social networking sites such as MySpace and Facebook enable adolescents to present themselves publicly, sometimes in very sexually suggestive ways; however, adult on-line predators are not using social n etworking sites to find or entice their victims.One national survey of â€Å"sexing† with cell phones, conducted with 13- to 19-year-olds, revealed that 20% had sent and 48% had received sexual messages. However, social networking sites can also be used prosocially for safer-sex campaigns, for example. Substance Use In the United States, more than $22 billion is spent marketing and advertising drugs ($13 billion on tobacco, $5 billion on alcohol, and $4 billion on prescription drugs), and many research studies have shown that it has a significant impact on adolescent use.Children and teenagers can also see considerable alcohol and drug content in on-line videos. Recent studies of social networking sites have found that substance abuse is referenced in 40% of the profiles. Portrayals of tobacco are also prevalent in the movies: ? 70% of movies made in the United States today contains smoking, and smoking is rarely associated with negative health outcomes. Longitudinal prospect ive studies have revealed that exposure to movie smoking at baseline (grades 5–8) predicts smoking initiation 1 to 8 years later.Experimental research has helped illuminate why exposure to movie characters' smoking is associated with smoking initiation: viewers who identify with the storyline and the characters are more likely to increase their intention to smoke. Obesity and Eating Disorders Numerous American and international longitudinal studies (one of them as long as 26 years in duration) have shown that media use is contributing to the current epidemic of obesity worldwide. However, the mechanism for why heavy television-viewing, in particular, is predictive of children's weight status is unclear. Food marketing may be 1 culprit.Children and teenagers see 4400–7600 ads per year for junk food and fast food on television alone. Randomized, controlled experiments have provided evidence that exposure to junk food advertising has an impact on children's food beliefs a nd preferences. The Internet now presents a new concern. As the Kaiser Foundation noted, â€Å"There is a vast amount of food related content online, with the potential to significantly expand and deepen children's exposure to food marketing messages. Apart from the influence of advertising, eating while viewing may lead to greater food consumption.College-aged students showed significantly greater consumption of food when subjects were watching television versus listening to classical music. The investigators hypothesized that satiety cues are suppressed in viewing conditions. Although the evidence that television-viewing displaces physical activity is equivocal, researchers are now examining whether heavy media use, particularly at nighttime, displaces sleep. Children who do not get enough sleep are more likely to engage in sedentary behaviors (such as television-viewing) and less likely to engage in physical activity.The media play a crucial role in the formation of body self-im age and may be responsible for creating unrealistic expectations and body dissatisfaction. Females who are regular readers of fashion and beauty magazines in early adolescence are more likely to suffer from a distorted body image during their teenaged years. A natural field experiment in Fiji revealed that the prevalence of eating disorders increased dramatically after the introduction of American television programs, which show excessively thin female lead characters.On the Internet, there are now ;100 proanorexia Web sites that not only encourage disordered eating but offer specific advice on purging, severely restricting caloric intake, and exercising excessively. School Performance and Learning Problems The possibility of a connection between television-viewing and ADD or other learning disabilities is currently an issue of great controversy. An initial study in 2004 revealed an association between daily hours of television-viewing at the ages of 1 to 2 years and subsequent atte ntional problems at the age of 7.However, a more recent study in which 59 children with ADD and 106 comparison children were examined actually revealed that the latter had more impairment in their cognitive processes after viewing television than the former. At least 4 studies have shown an impact on academic performance, especially if there is a television set in the child's or teenager's bedroom. Other Health Effects Heavy television-viewing has also been associated with hypercholesterolemia, hypertension, an increased prevalence of asthma, sleep disorders, mood disorders, psychological distress, and depression.These were largely correlational studies and, therefore, did not necessarily show cause and effect. Prosocial Effects Despite the negative effects listed above, the media can be powerfully prosocial and educational. Children and teenagers can learn antiviolence attitudes, empathy, tolerance toward people of other races and ethnicities, and respect for their elders. Video ga mes can be beneficial as well, including improving compliance with chemotherapy regimens in adolescents with cancer.Important and useful public messages can be successfully embedded into primetime television shows that are popular with adolescents. In an episode of the television program Friends, for example, Rachel tells her boyfriend Ross that she is pregnant although they had used a condom. A national telephone survey conducted with Friends viewers after the episode aired found that adolescents learned that condoms are not fool-proof and were more likely to discuss contraception with their parents.Similarly, a recent episode of Gray's Anatomy was effective in teaching viewers about HIV and pregnancy. Research into the impact of digital media on relationship formation and maintenance has revealed that on-line communication and on-line self-disclosure can stimulate adolescents' social connectedness and, thereby, their well-being. However, the benefits of socializing on-line are not equal for every child or adolescent. The positive Internet effect holds only when adolescents predominantly talk with their existing friends.Communication technologies that are most often used to communicate with strangers (eg, chat in a public chat room) or more solitary forms of Internet use (such as surfing the Web) have negative effects on social connectedness. TRADITIONAL MEDIA AND NEW MEDIA Children and adolescents spend more time with media than they do in any other activity except for sleeping—an average of ;7 hours/day. Children's bedrooms are replete with media technology: by 2005, two thirds had a television set, one half had a VCR or DVD player or video-game console, and nearly one third had Internet access or a computer.Media impact is increased significantly with the presence of a bedroom television: viewing increases 1 to 2 hours/day, risk of overweight increases by 31%, and the likelihood of smoking doubles. When a television is in the bedroom, parents are le ss able to monitor viewing habits , children participate in fewer activities such as reading and hobbies, and sleep is shortened Field Observation: Focus group: One of the aims of my research paper was to understand what children feel about the way they are affected by the Digital media. To do this i used one of our qualitative methods – focus group.A focus group is a method that is used by researchers to find out what people’s opinions and views are. During a focus group the researcher(s) will ask questions to stimulate discussion within the group, while taking note of what people are saying about particular issues. The focus group were conducted in Notre dame college-lwaize in total, 10 young people (5 males and 5 females) took part, who were all aged between 9 – 12year. Question asked during the focus group: * Do Digital media take a lot of your time? * Do you feel lost when you are not connected? Do you go online to check for new updates? * Do you feel you a lways have to go online to learn/view information? * Do you forget to eat when you are connected? * Do you use online social networking to retrieve any type of information? * Does spending time on social networking affects on your grades in a negative way? * Do you think you can stop yourself from always connecting online? * Are you unable to continue your day without checking for updates of news / friends online? * Has social networking sites made you become depressed? Do you enter sexual websites? * Do you talk with stranger people online? Analysis: After the focus groups were done, the information was analyzed and i was able to put together the information to have a basic result. I can say that each person had his/her own view, the information was not possible to evaluate and conduct on a percentage scale. The focus group study it showed that the males spend more time on social networking sites then men. They believe they do spend more time online which allows them to play ad ent er many kind of websites.All participants believe online social networking is time consuming and has its negatives. Some of the negatives given about online social networking. Some positives were: it has allowed a number of people to be curious to want to know more information, to learn more, to be able to communicate with people in different countries and be entertained. Solution and recommendation: Parents should limit total screen time for children older than 2 years to no more than 1 to 2 hours/day, and avoid screen time for children younger than 2 years.Also keep children's bedrooms free of screen media; and co-view media with their children and discuss the content.. Parents also need to avoid exposing young children to PG-13– and R-rated movies, given the prevalence of violent and sexual content in higher-rated film sand the new evidence that movie scenes that depict drinking alcohol and smoking may be very influential in teenagers' decisions to use alcohol and tobacco. In addition, parents can be mindful of their own media practices, because studies have shown that the strongest predictor of children's heavy media use is parents' heavy media use.Parental efforts to interpret, elaborate, and provide supplemental information on topics introduced by television have been found to be successful in countering negative or harmful content. In a recent study on exposure to sexual media content, adolescents who report that they discuss the content of what they see on television are less likely to engage in risky sexual activity. Moreover, Schools have not kept pace with modern media, especially in violence prevention, drug prevention, and sex education programs.With the amount of sexual suggestiveness currently displayed on television and in movies, schools no longer have any excuse for not providing comprehensive school-based sex education programs for children and adolescents, including full discussions of contraception and discussions of how sex and sex uality are portrayed in the media. Similarly, drug education programs must progress beyond scare tactics to incorporate principles of media education, teaching young people how to deconstruct alcohol and tobacco ads and, therefore, become more resilient.Conclusion: During the past 50 years, thousands of research studies have revealed that the media can be a powerful teacher of children and adolescents and have a profound impact on their health. To date, too little has been done by parents, health care practitioners, schools, the entertainment industry, or the government to protect children and adolescents from harmful media effects and to maximize the powerfully prosocial aspects of modern media. More research is needed, but sufficient data exist to warrant both concern and increased action. Digital Media Introduction: You may have heard of digital media, but you may have no idea what it is and how it can help you out when it comes to marketing. It's definitely important that you get up to speed so you can use this to benefit your business. Basically digital media refers to any type of electronic media out there. Today media can be accessed in many ways, including with hand held devices like mobile phones, laptops, desktops, mp3 players, and more. Digital media must be stored in an electronic way, so there is a lot of digital content on the internet today, including text content, pictures, audio content, as well as video content.Through the history of internet, digital media has been developing in various ways. Here's we'll take a look at how it has affected the Internet and ways that it may be integrated moving forwards (Rogers 2006). One type of digital media is text; this in fact represented the very first explosion of  this  type of content  out there on the Internet. When t he Internet first got big, there was an explosion of content on the web, especially with all the text editors and word processing options out there today (Rogers 2006).Larger companies started to put date on computers instead of storing it in cabinets, and the internet definitely allowed a great way to share, transfer, and store content as well. As the Internet grew, images began to appear. Instead of just text emails, soon people could send photos, and soon photo sites for sharing photos began to pop up. Then in the middle 1990s, audio began to become an important part of digital media with the mp3 files that could be easily used. Soon music and more was shared online with sites that allowed you to share audio.Last in the digital media development was video. YouTube definitely made video sharing a hugely popular form of modern media distribution and this is continuing to grow as we speak today. Now with new technology seen in things like the iPhone,  this new form of virtual medi a  is available in handheld devices as well, and no doubt  this sector  is only going to continue to grow in the future (Rogers 2006). Now that you understand a bit more about the technology side, you may be wondering how it can help your business.Well businesses are using digital media for marketing more and more today, realizing that there is a huge marketing field out there and that  it can help to draw in visitors and can even provide better search engine visibility with you. Text content can be kept updated on your site and helpful content is a great part of good marketing. Expertise in your field can really help your business and get traffic flowing into your business website. Photos, charts, diagrams, and models are always popular online and will help you to get more visibility as well.Audio allows you to use music on pages or to do podcasts for your business. Creating videos is a popular method of digital media marketing today, and videos do very well in search engin es (Rogers 2006). With the popularity of digital media, it is definitely important that you continue to create and use it for good marketing and business results. Even if you have to hire someone to help out, the benefits will make it worth the money. So knowing about and using digital media is definitely important for your business success todayProblem statement: Most people accept the idea that the media can influence people. But the degree of that influence, as well as who is most-impacted, when, how and why, have been the subjects of great debate among communication scholars for nearly a century. Media effects refers to the many ways individuals and society may be influenced by both news and entertainment mass media, including film, television, radio, newspapers, books, magazines, websites, video games, and music.To understand digital media effects, it is first critical to consider how media are used and for what purposes. Communication scholars have traditionally fallen into tw o camps – functionalists, who believe the media audience tends to be in control and active, and critical/culturalists who believe the audience has less control and is therefore more passive. The balance may lie somewhere in the middle and may vary from country to country. Purpose of the study: In this paper we are going to study and evaluate the digital media and its effect on children in general.The following text is a general idea: Youth spend an average of ;7 hours/day using media and the vast majority of them have access to a bedroom television, computer, the Internet, a video-game console, and a cell phone. In this paper we review the most recent research on the effects of media on the behavior and health and well-being of children and adolescents. Studies have shown that media can provide information about safe health practices and can foster social connectedness.However, recent evidence raises concerns about media's effects on aggression, sexual behavior, substance use , disordered eating, and academic difficulties. We provide recommendations for parents, practitioners, the media, and policy makers, among others, for ways to increase the benefits and reduce the harm that media can have for the developing child and for adolescents. More than 50 years of media research attests to the significant influence of media on child and adolescent health.Both â€Å"old† media (television, movies, magazines) and â€Å"new† media (the Internet and social networking sites, video/computer games, cell phones) can have an impact on virtually every health concern that practitioners and parents have about young people, including aggressive behavior, risky sexual behavior, substance use, and disordered eating. Although the media are not the leading cause of any of these problems, the research reviewed here suggests that they are significant.Yet, despite the evidence of potential harm, there is also evidence that media can be beneficial for youth (eg, by increasing empathy and acceptance of diversity through modeling of prosocial behaviors and developing children's early literacy skills through educational programming). Those concerned with child and adolescent health need to be aware of the research on the effects of modern media on youth. Theoretical framework: Literature review: Media affect youth not only by displacing time they spend doing homework or sleeping but also by influencing beliefs and behaviors.According to social learning theory, children and adolescents learn by observing and imitating what they see on the screen, particularly when these behaviors seem realistic or are rewarded. Cognitive development theory asserts that children's cognitive capacities at different stages determine if and how they understand media content. For example, children younger than 8 years who are not yet able to comprehend persuasive intent will be more vulnerable to advertising.In addition, media present youth with common â€Å"scriptsâ €  for how to behave in unfamiliar situations such as romantic relationships. Finally, superpeer theory states that the media are like powerful best friends in sometimes making risky behaviors seem like normative behavior. With the variety of theories suggesting a potentially powerful effect of the media and the growing empirical evidence for negative impact, one might hypothesize that parents would take care to limit exposure to detrimental media content.However, the â€Å"third-person effect† (a well-documented phenomenon in the communications literature) shows that teenagers and adults think that the media influence everyone except themselves or their children Violence and Aggression By the age of 18, the average adolescent will have seen an estimated 200 000 acts of violence on television alone. Much of the violence on television and in movies is presented in a sanitized and glamorized fashion, and in children's programming it often is presented as humorous.More than 1 0% of 10- to 14-year-olds saw 40 of the most violent movies in 2003. Both music videos and rap music have become increasingly violent. Interactive media can encourage antisocial beliefs and behavior in children and adolescents, particularly because violence in new media has been found to be prevalent as well. A recent analysis of video games revealed that more than half of all games contain violence, including ;90% rated as appropriate for children aged 10 years and older.Health professionals worry most about first-person shooter video games. In the aftermath of the West Paducah, KY school shooting, it was discovered that the shooter had never fired a real gun in his life before that day, yet his marksmanship was both accurate and lethal. Researchers believe that repeated exposure to mediated violence can lead to anxiety and fear, acceptance of violence as an appropriate means of solving conflict, and desensitization, with resulting increases in aggression and decreases in altruism. In particular, the portrayal of justifiable violence that is common in American media—â€Å"good guys versus bad guys†Ã¢â‚¬â€places children at risk because it is so powerfully reinforcing. The relationship between media violence and real-life aggression is nearly as strong as the impact of cigarette smoking on lung cancer not everyone who smokes will get lung cancer, and not everyone who views media violence will become aggressive themselves. However, the connection is significant. The most problematic forms of media violence include attractive and unpunished perpetrators, no harm to victims, realism, and humor. SexResearchers investigating the impact of exposure to sexual content in media on adolescent sexual beliefs and early sexual initiation have found modest but significant associations, particularly in the realm of pornography. In a national sample of 1500 10- to 17-year-olds, nearly half of the Internet users had been exposed to on-line pornography in the prev ious year. In a sample of middle-school youth, exposure to sexually explicit (X-rated) content predicted perpetration of sexual harassment (for males), more permissive sexual norms, having oral sex, and engaging in sexual intercourse while in high school.Longitudinal studies now exist that have linked heavy exposure to sexual content in mainstream media with more rapid progression of sexual activity, earlier coital behavior, greater risk for and unplanned pregnancy, and sexually transmitted disease. One explanation for this relationship may lie in the role of the media as a â€Å"superpeer† that gives adolescent audiences a consistent message that sex is normative and risk free. In addition, media play an important role in providing sexual information to adolescents in the United States and in shaping their beliefs about how males and females behave in romantic relationships.Television shows geared toward teenagers actually have more sexual content than adult-oriented shows, yet there is little mention of the need for contraception or for responsibility. Virtually every Western country makes birth control available to adolescents, including allowing birth control advertisements in the media, but the major US television networks balk at airing ads for contraception. This flies in the face of the fact that a substantial body of evidence shows that giving teenagers’ access to condoms does not lead to earlier sexual activity.Parents and child advocates often express concern over children connecting with strangers on-line. Although there have been disturbing cases of Internet sexual predatory activity by adults on children, most recent studies of Internet safety have suggested that sexual solicitation of minors is more likely to occur by other minors. Social networking sites such as MySpace and Facebook enable adolescents to present themselves publicly, sometimes in very sexually suggestive ways; however, adult on-line predators are not using social n etworking sites to find or entice their victims.One national survey of â€Å"sexing† with cell phones, conducted with 13- to 19-year-olds, revealed that 20% had sent and 48% had received sexual messages. However, social networking sites can also be used prosocially for safer-sex campaigns, for example. Substance Use In the United States, more than $22 billion is spent marketing and advertising drugs ($13 billion on tobacco, $5 billion on alcohol, and $4 billion on prescription drugs), and many research studies have shown that it has a significant impact on adolescent use.Children and teenagers can also see considerable alcohol and drug content in on-line videos. Recent studies of social networking sites have found that substance abuse is referenced in 40% of the profiles. Portrayals of tobacco are also prevalent in the movies: ? 70% of movies made in the United States today contains smoking, and smoking is rarely associated with negative health outcomes. Longitudinal prospect ive studies have revealed that exposure to movie smoking at baseline (grades 5–8) predicts smoking initiation 1 to 8 years later.Experimental research has helped illuminate why exposure to movie characters' smoking is associated with smoking initiation: viewers who identify with the storyline and the characters are more likely to increase their intention to smoke. Obesity and Eating Disorders Numerous American and international longitudinal studies (one of them as long as 26 years in duration) have shown that media use is contributing to the current epidemic of obesity worldwide. However, the mechanism for why heavy television-viewing, in particular, is predictive of children's weight status is unclear. Food marketing may be 1 culprit.Children and teenagers see 4400–7600 ads per year for junk food and fast food on television alone. Randomized, controlled experiments have provided evidence that exposure to junk food advertising has an impact on children's food beliefs a nd preferences. The Internet now presents a new concern. As the Kaiser Foundation noted, â€Å"There is a vast amount of food related content online, with the potential to significantly expand and deepen children's exposure to food marketing messages. Apart from the influence of advertising, eating while viewing may lead to greater food consumption.College-aged students showed significantly greater consumption of food when subjects were watching television versus listening to classical music. The investigators hypothesized that satiety cues are suppressed in viewing conditions. Although the evidence that television-viewing displaces physical activity is equivocal, researchers are now examining whether heavy media use, particularly at nighttime, displaces sleep. Children who do not get enough sleep are more likely to engage in sedentary behaviors (such as television-viewing) and less likely to engage in physical activity.The media play a crucial role in the formation of body self-im age and may be responsible for creating unrealistic expectations and body dissatisfaction. Females who are regular readers of fashion and beauty magazines in early adolescence are more likely to suffer from a distorted body image during their teenaged years. A natural field experiment in Fiji revealed that the prevalence of eating disorders increased dramatically after the introduction of American television programs, which show excessively thin female lead characters.On the Internet, there are now ;100 proanorexia Web sites that not only encourage disordered eating but offer specific advice on purging, severely restricting caloric intake, and exercising excessively. School Performance and Learning Problems The possibility of a connection between television-viewing and ADD or other learning disabilities is currently an issue of great controversy. An initial study in 2004 revealed an association between daily hours of television-viewing at the ages of 1 to 2 years and subsequent atte ntional problems at the age of 7.However, a more recent study in which 59 children with ADD and 106 comparison children were examined actually revealed that the latter had more impairment in their cognitive processes after viewing television than the former. At least 4 studies have shown an impact on academic performance, especially if there is a television set in the child's or teenager's bedroom. Other Health Effects Heavy television-viewing has also been associated with hypercholesterolemia, hypertension, an increased prevalence of asthma, sleep disorders, mood disorders, psychological distress, and depression.These were largely correlational studies and, therefore, did not necessarily show cause and effect. Prosocial Effects Despite the negative effects listed above, the media can be powerfully prosocial and educational. Children and teenagers can learn antiviolence attitudes, empathy, tolerance toward people of other races and ethnicities, and respect for their elders. Video ga mes can be beneficial as well, including improving compliance with chemotherapy regimens in adolescents with cancer.Important and useful public messages can be successfully embedded into primetime television shows that are popular with adolescents. In an episode of the television program Friends, for example, Rachel tells her boyfriend Ross that she is pregnant although they had used a condom. A national telephone survey conducted with Friends viewers after the episode aired found that adolescents learned that condoms are not fool-proof and were more likely to discuss contraception with their parents.Similarly, a recent episode of Gray's Anatomy was effective in teaching viewers about HIV and pregnancy. Research into the impact of digital media on relationship formation and maintenance has revealed that on-line communication and on-line self-disclosure can stimulate adolescents' social connectedness and, thereby, their well-being. However, the benefits of socializing on-line are not equal for every child or adolescent. The positive Internet effect holds only when adolescents predominantly talk with their existing friends.Communication technologies that are most often used to communicate with strangers (eg, chat in a public chat room) or more solitary forms of Internet use (such as surfing the Web) have negative effects on social connectedness. TRADITIONAL MEDIA AND NEW MEDIA Children and adolescents spend more time with media than they do in any other activity except for sleeping—an average of ;7 hours/day. Children's bedrooms are replete with media technology: by 2005, two thirds had a television set, one half had a VCR or DVD player or video-game console, and nearly one third had Internet access or a computer.Media impact is increased significantly with the presence of a bedroom television: viewing increases 1 to 2 hours/day, risk of overweight increases by 31%, and the likelihood of smoking doubles. When a television is in the bedroom, parents are le ss able to monitor viewing habits , children participate in fewer activities such as reading and hobbies, and sleep is shortened Field Observation: Focus group: One of the aims of my research paper was to understand what children feel about the way they are affected by the Digital media. To do this i used one of our qualitative methods – focus group.A focus group is a method that is used by researchers to find out what people’s opinions and views are. During a focus group the researcher(s) will ask questions to stimulate discussion within the group, while taking note of what people are saying about particular issues. The focus group were conducted in Notre dame college-lwaize in total, 10 young people (5 males and 5 females) took part, who were all aged between 9 – 12year. Question asked during the focus group: * Do Digital media take a lot of your time? * Do you feel lost when you are not connected? Do you go online to check for new updates? * Do you feel you a lways have to go online to learn/view information? * Do you forget to eat when you are connected? * Do you use online social networking to retrieve any type of information? * Does spending time on social networking affects on your grades in a negative way? * Do you think you can stop yourself from always connecting online? * Are you unable to continue your day without checking for updates of news / friends online? * Has social networking sites made you become depressed? Do you enter sexual websites? * Do you talk with stranger people online? Analysis: After the focus groups were done, the information was analyzed and i was able to put together the information to have a basic result. I can say that each person had his/her own view, the information was not possible to evaluate and conduct on a percentage scale. The focus group study it showed that the males spend more time on social networking sites then men. They believe they do spend more time online which allows them to play ad ent er many kind of websites.All participants believe online social networking is time consuming and has its negatives. Some of the negatives given about online social networking. Some positives were: it has allowed a number of people to be curious to want to know more information, to learn more, to be able to communicate with people in different countries and be entertained. Solution and recommendation: Parents should limit total screen time for children older than 2 years to no more than 1 to 2 hours/day, and avoid screen time for children younger than 2 years.Also keep children's bedrooms free of screen media; and co-view media with their children and discuss the content.. Parents also need to avoid exposing young children to PG-13– and R-rated movies, given the prevalence of violent and sexual content in higher-rated film sand the new evidence that movie scenes that depict drinking alcohol and smoking may be very influential in teenagers' decisions to use alcohol and tobacco. In addition, parents can be mindful of their own media practices, because studies have shown that the strongest predictor of children's heavy media use is parents' heavy media use.Parental efforts to interpret, elaborate, and provide supplemental information on topics introduced by television have been found to be successful in countering negative or harmful content. In a recent study on exposure to sexual media content, adolescents who report that they discuss the content of what they see on television are less likely to engage in risky sexual activity. Moreover, Schools have not kept pace with modern media, especially in violence prevention, drug prevention, and sex education programs.With the amount of sexual suggestiveness currently displayed on television and in movies, schools no longer have any excuse for not providing comprehensive school-based sex education programs for children and adolescents, including full discussions of contraception and discussions of how sex and sex uality are portrayed in the media. Similarly, drug education programs must progress beyond scare tactics to incorporate principles of media education, teaching young people how to deconstruct alcohol and tobacco ads and, therefore, become more resilient.Conclusion: During the past 50 years, thousands of research studies have revealed that the media can be a powerful teacher of children and adolescents and have a profound impact on their health. To date, too little has been done by parents, health care practitioners, schools, the entertainment industry, or the government to protect children and adolescents from harmful media effects and to maximize the powerfully prosocial aspects of modern media. More research is needed, but sufficient data exist to warrant both concern and increased action.