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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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Goose Bumps
Goose bumps, goosebumps or goose-pimples are the bumps on a person's skin at the base of body hairs which may involuntarily develop when a person is tickled, cold or experiencing strong emotions such as fear, euphoria or sexual arousal. The formation of goose bumps in humans under stress is considered to be a vestigial reflex. Its function in other apes is to raise the body's hair, and would have made human ancestors appear larger to scare off predators or to increase the amount of air trapped in the fur to make it more insulating. The reflex of producing goose bumps is known as piloerection or the pilomotor reflex, or, more traditionally, horripilation. It occurs in many mammals; a prominent example is porcupines, which raise their quills when threatened, or sea otters when they encounter sharks or other predators.
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  • 29 Nov 2022
Topic Review
LGBT Culture in Philadelphia
The development of LGBT culture in Philadelphia can be traced back to the early 20th century. It exists in current times as a dynamic and diverse culture with establishments and events held to promote LGBT culture and rights in Philadelphia and beyond.
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  • 29 Nov 2022
Topic Review
Electronic Leash
An electronic leash is the pairing (“leashing”) of one or more wireless devices to a host device that allows the user to find misplaced or out-of-sight objects by activating the host device such that the “leashed” object identifies itself. The system is identical in concept to a key pager, but offers multiple codes that allow a single user-operated device to send codes to a large number of objects. Leash systems generally also offer a form of distance measurement that raises an alarm if the leashed object travels more than a selected distance from the operator. An electronic leash with a paired devices usually includes a power source, transmitter and receiver. Optional elements can include tactile, auditory, or visual indicators to help the user realize the distance traveled from the object is past the maximum. Along with the physical elements, it is very common to have a computer program or mobile application to allow for modification of factory settings of distance allowed from source to receiver and the indication of this event occurring.
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  • 29 Nov 2022
Topic Review
The Satanic Bible
The Satanic Bible is a collection of essays, observations, and rituals published by Anton LaVey in 1969. It is the central religious text of LaVeyan Satanism, and is considered the foundation of its philosophy and dogma. It has been described as the most important document to influence contemporary Satanism. Though The Satanic Bible is not considered to be sacred scripture in the way that the Christian Bible is to Christianity, LaVeyan Satanists regard it as an authoritative text as it is a contemporary text that has attained for them scriptural status. It extols the virtues of exploring one's own nature and instincts. Believers have been described as "atheistic Satanists" because they believe that God is not an external entity, but rather something that each person creates as a projection of their own personality—a benevolent and stabilizing force in their life. There have been thirty printings of The Satanic Bible, selling over a million copies. The Satanic Bible is composed of four books: The Book of Satan, The Book of Lucifer, The Book of Belial, and The Book of Leviathan. The Book of Satan challenges the Ten Commandments and the Golden Rule, and promotes Epicureanism. The Book of Lucifer holds most of the philosophy in The Satanic Bible, with twelve chapters discussing topics such as indulgence, love, hate, and sex. LaVey also uses the book to dispel rumors surrounding the religion. In The Book of Belial, LaVey details rituals and magic. He discusses the required mindset and focus for performing a ritual, and provides instructions for three rituals: those for sex, compassion, or destruction. The Book of Leviathan provides four invocations for Satan, lust, compassion, and destruction. It also lists the nineteen Enochian Keys (adapted from John Dee's Enochian keys), provided both in Enochian and in English translation. There have been both positive and negative reactions to The Satanic Bible. It has been described as "razor-sharp" and "influential". Criticism of The Satanic Bible stems both from qualms over LaVey's writing and disapproval of the content itself. LaVey has been criticized for plagiarizing sections, and accusations have been made that his philosophies are largely borrowed. Attempts have been made to ban the book in schools, public libraries, and prisons, though these attempts are somewhat rare.
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  • 29 Nov 2022
Topic Review
Minitel
The Minitel was a Videotex online service accessible through telephone lines, and is considered one of the world's most successful pre-World Wide Web online services. The service was rolled out experimentally in 1978 in Brittany and throughout France in 1982 by the PTT (Postes, Télégraphes et Téléphones; divided since 1991 between France Télécom and La Poste). From its early days, users could make online purchases, make train reservations, check stock prices, search the telephone directory, have a mail box, and chat in a similar way to what is now made possible by the Internet. In February 2009, France Télécom indicated the Minitel network still had 10 million monthly connections. France Télécom retired the service on 30 June 2012.
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  • 29 Nov 2022
Biography
Bruce Westerman
Bruce Eugene Westerman (born November 18, 1967) is a Republican U.S. Representative for Arkansas' 4th congressional district. Previously, he served as the Majority Leader of the Arkansas House of Representatives. In 2014, Westerman ran successfully for the U.S. House to succeed Tom Cotton, who had unseated Democratic U.S. Senator Mark Pryor. Westerman was reared in and still resides in Hot S
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  • 29 Nov 2022
Topic Review
Recognition Memory
Recognition memory, a subcategory of declarative memory, is the ability to recognize previously encountered events, objects, or people. When the previously experienced event is reexperienced, this environmental content is matched to stored memory representations, eliciting matching signals. As first established by psychology experiments in the 1970s, recognition memory for pictures is quite remarkable: humans can remember thousands of images at high accuracy after seeing each only once and only for a few seconds. Recognition memory can be subdivided into two component processes: recollection and familiarity, sometimes referred to as "remembering" and "knowing", respectively. Recollection is the retrieval of details associated with the previously experienced event. In contrast, familiarity is the feeling that the event was previously experienced, without recollection. Thus, the fundamental distinction between the two processes is that recollection is a slow, controlled search process, whereas familiarity is a fast, automatic process. Mandler's "Butcher-on-the-bus" example: Imagine taking a seat on a crowded bus. You look to your left and notice a man. Immediately, you are overcome with this sense that you've seen this man before, but you cannot remember who he is. This automatically elicited feeling is familiarity. While trying to remember who this man is, you begin retrieving specific details about your previous encounter. For example, you might remember that this man handed you a fine chop of meat in the grocery store. Or perhaps you remember him wearing an apron. This search process is recollection.
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  • 29 Nov 2022
Topic Review
Ray-Finned Fish
Actinopterygii (/ˌæktɪnɒptəˈrɪdʒiaɪ/; from actino- 'having rays', and grc πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fishes, is a clade (traditionally class or subclass) of the bony fishes. They comprise over 50% of living vertebrate species. The ray-finned fishes are so-called because their fins are webs of skin supported by bony or horny spines (rays), as opposed to the fleshy, lobed fins that characterize the class Sarcopterygii (lobe-finned fish). These actinopterygian fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the link or connection between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). By species count, actinopterygians dominate the vertebrates, and they comprise nearly 99% of the over 30,000 species of fish. They are ubiquitous throughout freshwater and marine environments from the deep sea to the highest mountain streams. Extant species can range in size from Paedocypris, at 8 mm (0.3 in), to the massive ocean sunfish, at 2,300 kg (5,070 lb), and the long-bodied oarfish, at 11 m (36 ft). The vast majority of Actinopterygii (~99%) are teleosts.
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  • 29 Nov 2022
Biography
Roger Shepard
Roger Newland Shepard (born January 30, 1929) is an American cognitive scientist and author of the "universal law of generalization" (1987). He is considered a father of research on spatial relations. He studied mental rotation, and was an inventor of non-metric multidimensional scaling, a method for representing certain kinds of statistical data in a graphical form that can be apprehended by hu
  • 2.8K
  • 30 Nov 2022
Topic Review
Asterism
An asterism is an observed pattern or group of stars in the sky. Asterisms can be any identified pattern or group of stars, and therefore are a more general concept than the formally defined 88 constellations. Constellations are based on asterisms, but unlike asterisms, constellations outline and today completely divide the sky and all its celestial objects into regions around their central asterisms. For example, the asterism known as the Big Dipper comprises the seven brightest stars in the constellation Ursa Major. Another is the asterism of the Southern Cross, within the constellation of Crux. Asterisms range from simple shapes of just a few stars to more complex collections of many stars covering large portions of the sky. The stars themselves may be bright naked-eye objects or fainter, even telescopic, but they are generally all of a similar brightness to each other. The larger brighter asterisms are useful for people who are familiarizing themselves with the night sky. The patterns of stars seen in asterisms are not necessarily a product of any physical association between the stars, but are rather the result of the particular perspectives of their observations. For example the Summer Triangle is a purely observational physically unrelated group of stars, but the stars of Orion's Belt are all members of the Orion OB1 association and five of the seven stars of the Big Dipper are members of the Ursa Major Moving Group. Physical associations, such as the Hyades or Pleiades, can be asterisms in their own right and part of other asterism at the same time.
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  • 29 Nov 2022
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