High Quality Content by WIKIPEDIA articles! The demagnetizing field, also called the stray field, is the magnetic field (H-field) generated by the magnetization in a magnet. The total magnetic field in a region containing magnets is the sum of the demagnetizing fields of the magnets and the magnetic field due to any free currents or displacement currents. The term demagnetizing field reflects its tendency to act on the magnetization so as to reduce the total magnetic moment. It gives rise to shape anisotropy in ferromagnets with a single magnetic domain and to magnetic domains in larger ferromagnets.
High Quality Content by WIKIPEDIA articles! The Demographics of Vancouver concern population growth and structure for Vancouver, British Columbia, Canada. Figures given here are for the Greater Vancouver Regional District, however, not for the City of Vancouver proper.
High Quality Content by WIKIPEDIA articles! The demographics of Eritrea describes the condition and overview of Eritrea`s inhabitants. Demographic topics include basic education, health and population statistics, as well as identified ethnic and religious affiliations.
High Quality Content by WIKIPEDIA articles! Demolition is the tearing-down of buildings and other structures. Demolition contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for re-use.
High Quality Content by WIKIPEDIA articles! A commonly used convention for selecting frames of reference in robotics applications is the Denavit and Hartenberg (D–H) convention which was introduced by Jaques Denavit and Richard S. Hartenberg. In this convention, each homogeneous transformation is represented as a product of four basic transformations. The common normal between two lines was the main geometric concept that allowed Denavit and Hartenberg to find a minimal representation. The reference frames are laid out as follows:
High Quality Content by WIKIPEDIA articles! In solid-state and condensed matter physics, the density of states (DOS) of a system describes the number of states per interval of energy at each energy level that are available to be occupied by electrons. Unlike isolated systems, like atoms or molecules in gas phase, the density distributions are not discrete like a spectral density but continuous. A high DOS at a specific energy level means that there are many states available for occupation. A DOS of zero means that no states can be occupied at that energy level. In general a DOS is an average over the space and time domains occupied by the system. Local variations, most often due to distortions of the original system, are often called...
High Quality Content by WIKIPEDIA articles! The Derby Canal ran 14 miles (23 km) from the Trent and Mersey Canal at Swarkestone to Derby and Little Eaton, and to the Erewash Canal at Sandiacre, Derbyshire, England. The canal gained its Act of Parliament in 1793 and was fully completed in 1796. The canal`s main cargo was coal.
High Quality Content by WIKIPEDIA articles! Derby Racer was the name of two wooden roller coasters that operated at Revere Beach in Revere, Massachusetts. The first coaster was built in 1911 and demolished in 1936. The second coaster of the same name was built in 1937 and demolished in 1948. Both coasters were racing roller coasters, with side-by-side track pairs where two coaster trains would race each other around the circuit of the coaster.
High Quality Content by WIKIPEDIA articles! Derwick Associates is a firm a primarily Venezuelan company that “provides engineering, procurement and power-plant construction services". During an energy crisis in Venezuela in 2009-2010, Derwick won several contracts to construct and provide supplies for a number of power plants in that country and has been the subject of scrutiny.
High Quality Content by WIKIPEDIA articles! Design-build (or design/build, and abbreviated D–B or D/B accordingly) is a project delivery system used in the construction industry. It is a method to deliver a project in which the design and construction services are contracted by a single entity known as the design–builder or design–build contractor. In contrast to "design–bid–build" (or "design–tender"), design–build relies on a single point of responsibility contract and is used to minimize risks for the project owner and to reduce the delivery schedule by overlapping the design phase and construction phase of a project. "DB with its single point responsibility carries the clearest contractual remedies for the clients...
High Quality Content by WIKIPEDIA articles! A desmodromic valve is a reciprocating engine valve that is positively closed by a cam and leverage system, rather than by a more conventional spring.
High Quality Content by WIKIPEDIA articles! In electronics, desoldering is the removal of solder and components from a circuit for troubleshooting, for repair purposes, component replacement, and to salvage components. Electronic components are often mounted on a circuit board, and it is usually desirable to avoid damaging the circuit board, surrounding components, and the component being removed.
High Quality Content by WIKIPEDIA articles! A detachable chairlift or high-speed chairlift is a type of passenger aerial lift, which, like a fixed-grip chairlift, consists of numerous chairs attached to a constantly moving wire rope (called a haul rope) that is strung between two (or more) terminals over intermediate towers. They are now commonplace at all but the smallest of ski resorts. Some are installed at tourist attractions as well as for urban transportation.
High Quality Content by WIKIPEDIA articles! Deuterium (symbol D or 2H, also known as heavy hydrogen) is one of two stable isotopes of hydrogen. It has a natural abundance in Earth`s oceans of about one atom in 6,420 of hydrogen. Thus deuterium accounts for approximately 0.0156% (or on a mass basis: 0.0312%) of all the naturally occurring hydrogen in the oceans, while the most common isotope (hydrogen-1 or protium) accounts for more than 99.98%. The abundance of deuterium changes slightly from one kind of natural water to another (see VSMOW).
High Quality Content by WIKIPEDIA articles! Deutsche Bank Place is a 240 m (790 ft) skyscraper in Sydney, New South Wales, Australia. It is located at 126 Phillip Street (corner of Hunter Street) in the north-eastern end of the central business district, across the road from Chifley Tower. Construction began in 2002 and was completed in 2005. The building`s architect is Norman Foster of Foster and Partners. Deutsche Bank is the primary tenant, occupying 9 floors and owning the naming rights.
High Quality Content by WIKIPEDIA articles! The development of the inner German border took place in a number of stages between 1945 and the mid-1980s. After its establishment in 1945 as the dividing line between the Western and Soviet occupation zones of Germany, in 1949 the inner German border became the frontier between the Federal Republic of Germany (FRG, West Germany) and the German Democratic Republic (GDR, East Germany). The border remained relatively easy to cross until it was abruptly closed by the GDR in 1952 in response to the large-scale emigration of East Germans to the West. Barbed-wire fences and minefields were installed and draconian restrictions were placed on East German citizens living near the border. Thousands were...
High Quality Content by WIKIPEDIA articles! The Devils Island Lighthouse is a lighthouse located on Devils Island, one of the Apostle Islands, in Lake Superior in Ashland County, Wisconsin, near the city of Bayfield.
High Quality Content by WIKIPEDIA articles! The Devizes to Westminster International Canoe Marathon is a marathon canoe race in England. The race is held every Easter over a course of 125 miles (201 km) from Devizes in Wiltshire to Westminster in central London. It has been run since 1948. Starting at Devizes wharf, the route follows the Kennet and Avon canal for 54 miles to Reading, where it joins the Thames. Another 54 miles later it reaches Teddington Lock, ending 17 miles later at Westminster Bridge.