ADVERTISING |
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Firms in the advertising and public relations services industry prepare advertisements for other companies and organizations and design campaigns to promote the interests and image of their clients. This industry also includes media representativesÂfirms that sell advertising space for publications, radio, television, and the Internet; display advertisersÂbusinesses engaged in creating and designing public display ads for use in shopping malls, on billboards, or in similar media; and direct mail advertisers. A firm that purchases advertising time (or space) from media outlets, thereafter reselling it to advertising agencies or individual companies directly, is considered a media buying agency. Divisions of companies that produce and place their own advertising are not considered part of this industry.
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AEROSOLS |
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Aerosol spray is the name given to a type of canister containing liquid under pressure from pressurized vapor in equilibrium with another liquid, which often also dissolves the payload (see propellant below). When the can's valve is opened, the liquid is forced out of a small hole and emerges as an aerosol, or mist. As gas expands to drive out the payload, some propellant evaporates inside the can to maintain an even pressure. Outside the can, the droplets of propellant evaporate rapidly, leaving the payload suspended as very fine particles or droplets. Typical liquids dispensed in this way are insecticides, deodorants and paints. An atomiser is a similar device that is pressurised by a hand-operated pump rather than by stored gas.
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CARBON MONOXIDE EMISSIONS |
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Carbon monoxide, chemical formula CO, is a colorless, odorless, tasteless, flammable and highly toxic gas. It is a major product of the incomplete combustion of carbon and carbon-containing compounds. It is less dense than air under ordinary conditions, however it accumulates on the ground, meaning that if poisoning causes loss of consciousness the amount of carbon monoxide inhaled increases and so fatality is radically increased. It is very slightly soluble in water and burns in air with a characteristic blue flame, producing carbon dioxide; it is a component of producer gas and water gas, which are widely used artificial fuels. It is a reducing agent, removing oxygen from many compounds and is used in the reduction of metals, e.g., iron , from their ores. At high pressures and elevated temperatures it reacts with hydrogen in the presence of a catalyst to form methanol. Carbon monoxide is formed by combustion of carbon in oxygen at high temperatures when there is an excess of carbon. It is also formed with a byproduct oxygen by decomposition of carbon dioxide at very high temperatures (above 2,000 °C). It is present in the exhaust of internal-combustion engines, often the exhaust of automobiles, and is generated in coal stoves, furnaces, and gas appliances that do not get enough air. This may be due to insufficient ventilation or other reasons.
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DUST CONTROL |
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Dust consists of tiny solid particles carried by air currents. These articles are formed by a disintegration or fracture process, such as grinding, crushing, or impact. The Mine Safety and Health Administration (MSHA) defines dust as finely divided solids that may become airborne from the original state without any chemical or physical change other than fracture.
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EMERGENCY MANAGEMENT |
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Emergency preparedness is a set of doctrines to prepare civil society to cope with - or plan for - natural or man-made disasters. Emergency Operations or Disaster relief are the subset of these doctrines that are concerned with recovery efforts; these comprise the execution or implementation of the Emergency preparedness plans. This is usually a government policy adapted from civil defense to prepare for nonmilitary civil emergencies before they happen. Emergency management involves plans, structures and arrangements established to engage the normal endeavours of government, voluntary and private agencies in a comprehensive and coordinated way to respond to the whole spectrum of emergency needs. This is also known as disaster management
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MARITIME / COASTAL ENGINEERING |
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Marine Engineers are the officers of a ship which operate and maintain the propulsion and electrical generation systems onboard a ship. They also can help with the design, build, and repair of these complicated systems. New design is mostly included within the naval architecture or ship design. The merchant and military fleets of the world would not move without Marine Engineers. The field is closely related to mechanical engineering, although the modern engineer requires knowledge (and hands on experience) with electrical, electronic, pneumatic, hydraulic, chemistry, control engineering, naval architecture, process engineering,gas turbines and even nuclear technology on military vessels.
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MATERIALS |
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Materials are physical substances used as inputs to production or manufacturing. "Raw materials" are first extracted or harvested from the earth and divided into a form that can be easily transported and stored, then processed to produce "semi-finished materials". These can be input into a new cycle of production and "finishing processes to create "finished materials", ready for distribution and consumption.
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