Summary

HandWiki is the world's largest wiki-style encyclopedia dedicated to science, technology and computing. It allows you to create and edit articles as long as you have external citations and login account. In addition, this is a content management environment that can be used for collaborative editing of original scholarly content, such as books, manuals, monographs and tutorials.

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National Electronic Library for Health
The National electronic Library for Health (NeLH) was a digital library service provided by the NHS for healthcare professionals and the public between 1998 and 2006. It briefly became the National Library for Health and elements of it continue to this day as NHS Evidence, managed by the National Institute for Health and Care Excellence, and a range of services provided by Health Education England's Library and Knowledge Service Leads.
  • 832
  • 10 Oct 2022
Topic Review
Token Ring
Token Ring is a computer networking technology used to build local area networks. It uses a special three-byte frame called a token that travels around a logical ring of workstations or servers. This token passing is a channel access method providing fair access for all stations, and eliminating the collisions of contention-based access methods. There were several other earlier implementations of token-passing networks. Token Ring was introduced by IBM in 1984, and standardized in 1989 as IEEE 802.5. It was a successful technology, particularly in corporate environments, but was gradually eclipsed by the later versions of Ethernet.
  • 1.8K
  • 10 Oct 2022
Topic Review
M4 Cannon
The 37 mm Automatic Gun, M4, known as the T9 during development, was a 37 mm (1.46 in) recoil-operated autocannon designed by Browning Arms Company. The weapon, which was built by Colt, entered service in 1942. It was used in the Bell P-39 Airacobra and P-63 Kingcobra.
  • 1.6K
  • 10 Oct 2022
Topic Review
Neurodiversity
Neurodiversity is an approach to learning and mental health that argues various neurological conditions are the result of normal variations in the human genome. "Neurodiversity" is a portmanteau of "neurological" and "diversity" that originated in the late 1990s as a challenge to prevailing views of certain neurological conditions as inherently pathological, instead asserting that neurological differences should be recognized and respected as a social category on par with gender, ethnicity, sexual orientation, or disability status. The neurodiversity movement describes itself as an international civil rights movement, of which the autism rights movement is its most influential submovement. Citing the classic legal maxim, "Nothing About Us Without Us", the movement promotes self-advocacy of its members. Neurodiversity advocates promote support systems (such as inclusion-focused services, accommodations, communication and assistive technologies, occupational training, and independent living support) that allow those who are "non-neurotypical" to live their lives as they are, rather than being coerced or forced to adopt what neurodiversity proponents see as uncritically accepted ideas of normality, or to conform to a clinical ideal. Neurodiversity frames autism, dyslexia, and other neurological conditions as natural human variations rather than pathologies or disorders, and rejects the idea that neurological differences need to be (or can be) cured, instead believing them to be authentic forms of human diversity, self-expression, and being.
  • 941
  • 10 Oct 2022
Topic Review
UK Biobank
UK Biobank is a large long-term biobank study in the United Kingdom (UK) which is investigating the respective contributions of genetic predisposition and environmental exposure (including nutrition, lifestyle, medications etc.) to the development of disease. It began in 2006. Based in Stockport, Greater Manchester, it is incorporated as a limited company and registered charity in England and Wales, and registered as a charity in Scotland.
  • 2.7K
  • 10 Oct 2022
Topic Review
Crary Mountains
Crary Mountains (76°48′S 117°40′W) are a group of ice-covered volcanoes in Marie Byrd Land, Antarctica. They consist of two or three shield volcanoes, named Mount Rees, Mount Steere and Mount Frakes, which developed during the course of the Miocene and Pliocene and last erupted about 30,000-40,000 years ago. The first two volcanoes are both heavily incised by cirques, while Mount Frakes is better preserved and has a 4 kilometres (2.5 mi) wide caldera at its summit. Boyd Ridge is another part of the mountain range and lies southeast of Mount Frakes; it might be the emergent part of a platform that underlies the mountain range. The volcanoes consist mainly of basalt, trachyte and phonolite in the form of lava flows, scoria and hydrovolcanic formations. Volcanic activity here is linked to the West Antarctic Rift system, which is responsible for the formation of a number of volcanoes in the region. During their existence, the range was affected by glaciation and glacial-volcanic interactions.
  • 767
  • 10 Oct 2022
Topic Review
Electric Vehicle Grand Prix
The Electric Vehicle Grand Prix (stylized as evGrand Prix) is an electric go-kart race held at Purdue University and the Indianapolis Motor Speedway.
  • 940
  • 10 Oct 2022
Topic Review
Coquina
Coquina (/koʊˈkiːnə/) is a sedimentary rock that is composed either wholly or almost entirely of the transported, abraded, and mechanically-sorted fragments of the shells of mollusks, trilobites, brachiopods, or other invertebrates. For a sediment to be considered to be a coquina, the particles composing it should average 2 mm (0.079 in) or greater in size. Coquina can vary in hardness from poorly to moderately cemented. Incompletely consolidated and poorly-cemented coquinas are considered grainstones in the Dunham classification system for carbonate sedimentary rocks. A well-cemented coquina is classified as a biosparite (fossiliferous limestone) according to the Folk classification of sedimentary rocks. Coquinas accumulate in high-energy marine and lacustrine environments where currents and waves result in the vigorous winnowing, abrasion, fracturing, and sorting of the shells that compose them. As a result, they typically exhibit well-developed bedding or cross-bedding, close packing, and good orientation of the shell fragments. The high-energy marine or lacustrine environments associated with coquinas include beaches, shallow submarine raised banks, swift tidal channels, and barrier bars.
  • 2.4K
  • 10 Oct 2022
Topic Review
Pole Shift Hypothesis
The cataclysmic pole shift fringe theory suggests that there have been geologically rapid shifts in the relative positions of the modern-day geographic locations of the poles and the axis of rotation of the Earth, creating calamities such as floods and tectonic events. There is evidence of precession and changes in axial tilt, but this change is on much longer time-scales and does not involve relative motion of the spin axis with respect to the planet. However, in what is known as true polar wander, the solid Earth can rotate with respect to a fixed spin axis. Research shows that during the last 200 million years a total true polar wander of some 30° has occurred, but that no super-rapid shifts in the Earth's pole were found during this period. A characteristic rate of true polar wander is 1° or less per million years. Between approximately 790 and 810 million years ago, when the supercontinent Rodinia existed, two geologically rapid phases of true polar wander may have occurred. In each of these, the magnetic poles of the Earth shifted by approximately 55°.
  • 12.6K
  • 10 Oct 2022
Topic Review
Chemical Sensor Array
A chemical sensor array is a sensor architecture with multiple sensor components that create a pattern for analyte detection from the additive responses of individual sensor components. There exist several types of chemical sensor arrays including electronic, optical, acoustic wave, and potentiometric devices, which are described below. These chemical sensor arrays can employ multiple sensor types that are cross-reactive or tuned to sense specific analytes.
  • 2.6K
  • 18 Jul 2023
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