GC: n CT: A structure, used to dam up a stream or river, over which the water flows, is called a weir. The conditions of flow, in the case of a weir, are practically the same as those of a rectangular notch. That is why, a notch is, sometimes, called

GC: n CT: Wavegen, a unit of Voith Hydro, produces a shoreline wave energy conversion unit called Limpet. The technology used is called an oscillating water column. Ocean waves move air in and out of chambers in a breakwater. This compressed air drives Wavegen’s turbine, known as the Wells turbine,

See hydraulic energy, hydroelectric power

GC: n CT: Wi-Fi has become the preferred means for connecting to the Internet, without wires: at home, in the office, in hotels and restaurants, at airports and railway stations. Increasingly, it is providing access to the Internet for remote communities in developing countries and in rural areas of developed

GC: n CT: Despite the fact that wikis provide an easy-to-use, free and powerful means to edit information, fewer than 1% of visitors contributed content to the wiki. These results may be a function of limited interest in the topic area, the review methodology itself, lack of familiarity with the

GC: n CT: Wind energy takes advantage of kinetic energy in moving air (wind), to turn large blades connected to a central hub. The blades (called rotors) are often made of fibre-glass, designed to be aerodynamic and are mounted on a tower. Larger rotors have a larger ‘swept area’ and

GC: n CT: Wind energy development zones, if done right, could be helpful to both birds and wind energy development. Siting is the most important step in making wind energy bird-smart, and American Bird Conservancy (ABC) is developing a map of the areas where wind energy would be most risky

GC: n CT: Wind turbines operate on a simple principle. The energy in the wind turns two or three propeller-like blades around a rotor. The rotor is connected to the main shaft, which spins a generator to create electricity. So how do wind turbines make electricity? Simply stated, a wind

GC: n CT: Wind energy is one of the oldest source of energy used by mankind, comparable only to the use of any animal force and biomass. A wind turbine is a device that converts kinetic energy from the wind into mechanical energy. If the mechanical energy is used to

GC: n CT: Furthermore, table 6.1 presents a typical one-day period of operation of the combined wind-hydro power station in the area of Biannos. The wind speed distributions during a year and the monthly demand of Biannos –area have been provided by the Wind Energy Laboratory and PPC respectively. The

GC: n CT: A windmill is a machine which converts the energy of wind into rotational motion by means of adjustable vanes called sails. The main use is for a grinding mill powered by the wind, reducing a solid or coarse substance into pulp or minute grains, by crushing, grinding,

GC: n CT: Since the 1990s plans have been developed to build the largest windmill park of the Netherlands in the Noordoostpolder; partly on land and partly in the water of the Ijsselmeer. Especially the neighbouring community of Urk is not pleased about this and often attracts attention from the

GC: n CT: Another technical advance, on which we will focus in this report, is the wireless local loop (WLL) adopting radio as the transmission medium. WLL is often called the radio local loop (RLL) or the “fixed wireless access” (FWA). And WLL services are also referred to as the

GC: n CT: What is a wireless network? How is it different from a wired network? And what are the business benefits of a wireless network? The following overview answers basic questions such as What is a wireless network?, so you can decide if one is right for your business.

See tungsten

GC: n CT: Wood is considered humankind’s very first source of energy. Today it still is the most important single source of renewable energy providing over 9% of the global total primary energy supply. Wood energy is as important as all other renewable energy sources altogether (hydro, geothermal, wastes, biogas,

GC: n CT: Wood pellets are a renewable source of fuel. As long as the wood is sourced from a working forest (ie. one where more trees are planted to replace trees cut down) then the wood is renewable. To get more wood you simply grow more trees. When the

GC: n CT: Word sense disambiguation (WSD) is the ability to identify the meaning of words in context in a computational manner. WSD is considered an AI-complete problem, that is, a task whose solution is at least as hard as the most difficult problems in artificial intelligence. We introduce the

See computer worm

GC: n CT: X-rays are a form of electromagnetic radiation, similar to visible light. Unlike light, however, x-rays have higher energy and can pass through most objects, including the body. Medical x-rays are used to generate images of tissues and structures inside the body. If x-rays travelling through the body

GC: n CT: Xylan, which is a key component of the plant cell wall, consists of a backbone of beta-1,4-linked xylose residues that are decorated with arabinofuranose, acetyl, 4-O-methyl d-glucuronic acid and ferulate. The backbone of xylan is hydrolysed by endo-beta1,4-xylanases (xylanases); however, it is unclear whether the various side-chains

GC: n CT: Xyloid lignite differs from attital lignite in containing more than 50 percent anthraxylon, a material derived from woody parts of plants. Xyloid lignite is generally banded and original plant structures are well preserved. Most Texas lignite is of the xyloid type, although it commonly contains considerable amount

GC: n CT: Xylose (cf. Greek ξυλος, xylos, “wood”) is a sugar first isolated from wood and named for it. Xylose is classified as a monosaccharide of the aldopentose type, which means that it contains five carbon atoms and includes a formyl functional group. It is the precursor to hemicellulose,

GC: n CT: Yaw dynamics have been investigated by a number of researchers. The most comprehensive work was done by Swift (Swift, 1981 3. He developed a model which was used as the starting point for the work reported herein, He used bladeelernent/mornentum aerodynamics and was the first wind turbine