GC: npl CT: The increase in global emissions of carbon dioxide (CO2) from fossil-fuel combustion and other smaller industrial sources – the main cause of human-induced global warming – slowed down in 2012, while the global average annual growth rate of 2.4 ppm in atmospheric CO2 concentrations in 2012 was

GC: n CT: Understanding eLearning is simple. eLearning is learning utilizing electronic technologies to access educational curriculum outside of a traditional classroom. In most cases, it refers to a course, program or degree delivered completely online. There are many terms used to describe learning that is delivered online, via the

GC: n CT: There are three major problems with software projects: over budget, behind schedule and poor quality. It is often too late to correct these problems by the time they are detected in failed software projects. In this paper, we discuss design, implementation, and evaluation of an experimental intelligent

GC: n CT: An earth-to-air heat exchanger draws ventilation supply air through buried ducts or tubes. As the temperature of the ground below 3m is practically constant, it substantially reduces ambient air temperature fluctuations. It therefore provides space conditioning throughout the year, with the incoming air being heated in the

GC: n CT: The rugged Cabinet Mountains of northwestern Montana are an island of wild country with a population of fewer than 30 grizzly bears, their existence tenuous because they are cut off from others of their kind by distance, roads, and other development. Biologists are concerned about the small

GC: n CT: Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. Specific topics covered in the journal include: ecotechnology; synthetic ecology; bioengineering; sustainable agroecology; habitat reconstruction; restoration ecology; ecosystem conservation; ecosystem rehabilitation; stream and river restoration; wetland restoration and construction;

GC: n CT: Ecological flows and water levels are a component of the overall environmental flow and water level, and are established to provide for the ecological values attributed to a particular water body. In the context of the proposed standard, ecological flows and water levels are defined as “the

GC: n CT: Can sustainability plans make sustainable cities? The ecological footprint implications of renewable energy within Philadelphia’s Greenworks Plan. Municipal sustainability plans typically include laudable environmental goals, but they rarely explain the connection between these goals and a larger conception of sustainability. In this article, we examine one local

GC: n CT: Ecology is the study of environmental systems, or as it is sometimes called, the economy of nature. “Environmental” usually means relating to the natural, versus human-made world; the “systems” means that ecology is, by its very nature, not interested in just the components of nature individually but

GC: n CT: Reducing waste and reusing resources could help drive the UK’s economic recovery as well as benefit the environment, a conference was told on Tuesday. The chief executive of the government’s waste advisory body, Wrap, told senior business leaders, policymakers and local authority managers that efficient use of

GC: n CT: Electric current is the rate of charge flow past a given point in an electric circuit, measured in Coulombs/second which is named Amperes. In most DC electric circuits, it can be assumed that the resistance to current flow is a constant so that the current in the

GC: n CT: Unfortunately, when tree branches grow too close to the electric lines they can cause a power outage. Arcing or direct tree/wire contact is a major cause of power outages. In fact, a single tree/wire contact may deprive thousands of people of the electricity they need. If power

GC: n CT: Therefore, electricity is widely used in industries, establishments and in homes. Let us learn how the electricity we use at home comes from the electric power station. There are hydroelectric power stations (energy from water is converted into electricity), thermal power stations (energy from coal is converted

GC: n CT: What is an electric substation? Substations are a familiar sight alongside highways and in cities. Substations take the electricity from power plants and from the transmission lines and transform it from high to lower voltage. They distribute electricity to consumers and supervise and protect the distribution network

GC: n CT: Electrical energy is the energy carried by moving electrons in an electric conductor. It cannot be seen, but it is one of our most useful forms of energy because it is relatively easy to transmit and use. All matter consists of atoms, and every atom contains one

GC: n CT: Technology to utilise the forces of nature for doing work to supply human needs is as old as the first sailing ship. But attention swung away from renewable sources as the industrial revolution progressed on the basis of the concentrated energy locked up in fossil fuels. This

GC: n CT: Electricity generation is the first process in the delivery of electricity to consumers. The other three processes are electric power transmission, electricity distribution and electricity retailing. The demand for electricity can be met in two different ways. The primary method thus far has been for public or

GC: n CT: An electrolyser is a piece of scientific equipment that splits polarised molecules into its ions. In this case it will split water into hydrogen and oxygen gas. A dry cell electrolyser is an electrolyser that is completely enclosed; the other type is a wet cell electrolyser which

GC: n CT: Ionic substances contain charged particles called ions. For example, lead bromide contains positively charged lead ions and negatively charged bromide ions. Electrolysis is the process by which ionic substances are decomposed (broken down) into simpler substances when an electric current is passed through them. For electrolysis to

CG: n CT: Besides natural sources, the electromagnetic spectrum also includes fields generated by human-made sources: X-rays are employed to diagnose a broken limb after a sport accident. The electricity that comes out of every power socket has associated low frequency electromagnetic fields. And various kinds of higher frequency radiowaves

GC: n CT: Electricity can be static, like the energy that can make your hair stand on end. Magnetism can also be static, as it is in a refrigerator magnet. A changing magnetic field will induce a changing electric field and vice-versa (the two are linked). These changing fields form

GC: n CT: According to the theory quantum mechanics, an electron bound to an atom can not have any value of energy, rather it can only occupy certain states which correspond to certain energy levels. The formula defining the energy levels of a Hydrogen atom are given by the equation:

GC: n CT: Storage tanks are an important part of any distribution system. Water can be pumped into the tank during periods of low demand and then pumped out of the tank into the distribution system during periods of peak demand. In addition, storage tanks can provide the water pressure

GC: n CT: The story of Joseph Weizenbaum is in many ways almost as interesting as that of Turing. An early pioneer in computer science, Weizenbaum was one of the fortunate few to join the embryonic MIT Artificial Intelligence Lab in the early 1960s. His most celebrated accomplishment was the