GC: n CT: Diodes are components which allow current to flow in just one direction. It is often recommended that a diode be fitted in a photovoltaic solar panel to prevent reverse current from flowing back through the panel at night time. As current passes through a diode there is
GC: n CT: Photovoltaics is the direct conversion of light into electricity at the atomic level. Some materials exhibit a property known as the photoelectric effect that causes them to absorb photons of light and release electrons. When these free electrons are captured, an electric current results that can be
GC: n CT: DC (direct current) is the unidirectional flow or movement of electric charge carriers (which are usually electrons). The intensity of the current can vary with time, but the general direction of movement stays the same at all times. As an adjective, the term DC is used in
GC: n CT: This project is investigating heat loss from high-temperature solar thermal receivers and developing the next generation of improved receiver designs to reduce that loss. Experimental and computational modelling are being used to improve the understanding, prediction and management of convection and radiation heat loss in high-temperature solar
GC: n CT: Reusable medical waste tubs are our preferred transport container. We actively encourage all our customers to consider the use of reusable disposal containers instead of corrugated boxes to minimize the amount of deforestation. Since 2006, we have specifically initiated programs that foster the use of reusable containers
CG: n CT: Both online learning and distance learning require similar online learning tools, but there the similarity ends. Overall there are three major differences between online and distance learning: Location Interaction Intention Differences in Location The key difference between online learning and distance learning is location. With online learning
GC: n CT: Historically, distributed generation meant combustion generators (e.g. diesel gensets). They were affordable, and in some cases reliable, but they were not clean. While many people will tolerate dirty generation thousands of miles away from them, they think twice when it is outside their bedroom window or office
CG: n CT: Boilers to burn woodfuels such as wood chips and pellets tends to be physically larger and more expensive than equivalent gas or oil boilers. This is partly as a result of the physical requirements for a high temperature combustion environment and transporting the solid fuel. As boilers
GC: n CT: A dynamical system consists of an abstract phase space or state space, whose coordinates describe the state at any instant, and a dynamical rule that specifies the immediate future of all state variables, given only the present values of those same state variables. For example the state
CG: n CT: E-fuels, like e-methane, e-kerosene and e-methanol, are all fuels in gas or liquid form that are produced from renewable (solar or wind power, for example) or decarbonised electricity. This raw material differentiates them from biofuels, which are primarily produced from biomass. By drastically reducing the harmful emissions
GC: n CT: What is e-learning? In the early days of e-learning, some people were concerned that bringing computers into the classroom would remove the human element that many learners benefit from. But technology has developed, and smartphones and tablets are now widely embraced in both the classroom and office.
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