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.

Expand All
Entries
Topic Review
Optical Switch
An optical switch is a device that selectively switches optical signals from one channel to another. The switching can be temporal or spatial. The former is known as an optical (time-domain) switch or an optical modulator, while the latter is called an optical space switch or an optical router. In general, optical modulators and routers can be made from each other.
  • 2.3K
  • 17 Oct 2022
Topic Review
Comparison of On-demand Music Streaming Services
The following is a list of on-demand music streaming services. The services offer streaming of full-length content via the Internet as a part of their service, without the listener necessarily purchasing a file for download. This type of service is comparable to Internet radio. Many of these sites have advertising and offer non-free options in the style of an online music store. For a list of online music stores that provide a means of purchasing and downloading music as files of some sort, see: Comparison of online music stores. Many of both types of sites offer services similar to an online music database.
  • 1.9K
  • 17 Oct 2022
Topic Review
Cooper (Profession)
A cooper is a person trained to make wooden casks, barrels, vats, buckets, tubs, troughs and other similar containers from timber staves that were usually heated or steamed to make them pliable. Journeymen coopers also traditionally made wooden implements, such as rakes and wooden-bladed shovels. In addition to wood, other materials, such as iron, were used in the manufacturing process. The trade is the origin of the surname Cooper.
  • 4.7K
  • 17 Oct 2022
Topic Review
Glycoprotein Ib-IX-V Receptor Complex
The GPIb-IX-V complex is a profuse membrane receptor complex originating in megakaryocytes and exclusively functional on the surface of platelets. It primarily functions to mediate the first critical step in platelet adhesion, by facilitating binding to von Willebrand factor (VWF) on damaged sub-endothelium under conditions of high fluid shear stress. Although the primary ligand for the GPIb-V-IX receptor is VWF, it can also bind to a number of other ligands in the circulation such as thrombin, P-selectin, factor XI, factor XII, high molecular weight kininogen as well as bacteria. GPIb-IX-V offers a critical role in thrombosis, metastasis, and the life cycle of platelets, and is implicated in a number of thrombotic pathological processes such as stroke or myocardial infarction.
  • 899
  • 17 Oct 2022
Topic Review
Entrance Length
In fluid dynamics, the entrance length is the distance a flow travels after entering a pipe before the flow becomes fully developed. Entrance length refers to the length of the entry region, the area following the pipe entrance where effects originating from the interior wall of the pipe propagate into the flow as an expanding boundary layer. When the boundary layer expands to fill the entire pipe, the developing flow becomes a fully developed flow, where flow characteristics no longer change with increased distance along the pipe. Many different entrance lengths exist to describe a variety of flow conditions. Hydrodynamic entrance length describes the formation of a velocity profile caused by viscous forces propagating from the pipe wall. Thermal entrance length describes the formation of a temperature profile. Awareness of entrance length may be necessary for the effective placement of instrumentation, such as fluid flow meters.
  • 2.1K
  • 17 Oct 2022
Topic Review
Socialism in One Country
Socialism in One Country was a theory put forth by Joseph Stalin and Nikolai Bukharin in 1924 which was eventually adopted by the Soviet Union as state policy. The theory held that given the defeat of all the communist revolutions in Europe in 1917–1923 except Russia, the Soviet Union should begin to strengthen itself internally. That turn toward national communism was a shift from the previously held position by classical Marxism that socialism must be established globally (world communism). However, proponents of the theory argue that it contradicts neither world revolution nor world communism. The theory was in opposition to Leon Trotsky's theory of permanent revolution.
  • 13.5K
  • 17 Oct 2022
Topic Review
Historical Reliability of the Gospels
The historical reliability of the Gospels refers to the reliability and historic character of the four New Testament gospels as historical documents. Some believe that all four canonical gospels meet the five criteria for historical reliability; and others say that little in the gospels is considered to be historically reliable. Almost all scholars of antiquity agree that Jesus existed, but scholars differ on the historicity of specific episodes described in the Biblical accounts of Jesus, and the only two events subject to "almost universal assent" are that Jesus was baptized by John the Baptist and was crucified by the order of the Roman Prefect Pontius Pilate. Elements whose historical authenticity is disputed include the two accounts of the Nativity of Jesus, the miraculous events including the resurrection, and certain details about the crucifixion. According to the majority viewpoint the gospels of Matthew, Mark, and Luke, collectively referred to as the Synoptic Gospels, are the primary sources of historical information about Jesus and of the religious movement he founded. The fourth gospel, the Gospel of John, differs greatly from the first three gospels. Historians often study the historical reliability of the Acts of the Apostles when studying the reliability of the gospels, as Acts was seemingly written by the same author as the Gospel of Luke. Historians subject the gospels to critical analysis, attempting to differentiate, rather than authenticate, reliable information from possible inventions, exaggerations, and alterations. Since there are more than 15,000 New Testament manuscripts which present hundreds of thousands of textual variants, scholars use textual criticism to determine which gospel variants could theoretically be taken as 'original'. To answer this question, scholars have to ask who wrote the gospels, when they wrote them, what was their objective in writing them, what sources the authors used, how reliable these sources were, and how far removed in time the sources were from the stories they narrate, or if they were altered later. Scholars can also look into the internal evidence of the documents, to see if, for example, the document is misquoting texts from the Hebrew Tanakh, is making claims about geography that were incorrect, if the author appears to be hiding information, or if the author has made up a certain prophecy. Finally, scholars turn to external sources, including the testimony of early church leaders, writers outside the church (mainly Jewish and Greco-Roman historians) who would have been more likely to have criticized the early churches, and to archaeological evidence.
  • 25.2K
  • 18 Oct 2022
Topic Review
Automobile Accessory Power
Automobile accessory power can be transferred by several different means. However, it is always ultimately derived from the automobile's internal combustion engine, battery, or other "prime mover" source of energy. The advent of high-powered batteries in hybrid and all-electrical vehicles is shifting the balance of technologies even further in the direction of electrically powered accessories. An engine has one or more devices for converting energy it produces into a usable form, electricity connection through the alternator, hydraulic connections from a pump or engine system, compressed air, and engine vacuum; or the engine may be directly tapped through a mechanical connection. Modern vehicles run most accessories on electrical power. Typically, only 2% of a vehicle's total power output has gone towards powering accessories. Electrical and hybrid vehicles may use a larger proportion of energy for accessories, due to reduced inefficiencies in the drive train, especially the elimination of engine idling.
  • 1.1K
  • 15 Oct 2022
Topic Review
Chinese Views of Democracy
Chinese scholars, thinkers, and policy-makers have debated about democracy, an idea which was first imported by Western colonial powers but which some argue also has connections to classic Chinese thinking. Starting in the mid-eighteenth century, many Chinese argued about how to deal with the ever-encroaching Western culture. Though Chinese Confucians were initially opposed to Western modes of thinking, it became clear that aspects of the West were appealing. Industrialization gave the West an economic and military advantage. The devastating defeats of the First and Second Opium Wars compelled a segment of Chinese politicians and intellectuals to rethink their notion of cultural and political superiority. Democracy entered the Chinese consciousness because it was the form of government used in the West, potentially responsible for its industrial, economic and military advancements. A segment of Chinese scholars and politicians became persuaded that democratization and industrialization were imperative for a competitive China. In response, a number of scholars resisted the idea, saying democracy and Westernization had no place in traditional Chinese culture. Liang Shuming's opinion was most popular, holding that democracy and traditional Chinese society were completely incompatible, hence China's only choice was either wholesale Westernization or complete rejection of the West. The debate centered on the philosophical compatibility of traditional Chinese Confucian beliefs and the technologies of the West.
  • 780
  • 15 Oct 2022
Topic Review
Socialist Party of America
The Socialist Party of America (SPA) was a multi-tendency democratic socialist and social democratic political party in the United States formed in 1901 by a merger between the three-year-old Social Democratic Party of America and disaffected elements of the Socialist Labor Party of America which had split from the main organization in 1899. In the first decades of the 20th century, it drew significant support from many different groups, including trade unionists, progressive social reformers, populist farmers and immigrants. However, it refused to form coalitions with other parties, or even to allow its members to vote for other parties. Eugene V. Debs twice won over 900,000 votes in presidential elections (1912 and 1920) while the party also elected two Representatives (Victor L. Berger and Meyer London), dozens of state legislators, more than a hundred mayors and countless lesser officials. The party's staunch opposition to American involvement in World War I, although welcomed by many, also led to prominent defections, official repression and vigilante persecution. The organization was further shattered by a factional war over how to respond to the October Revolution in Imperial Russia in 1917 and the establishment of the Communist International in 1919—many members left the party in favor of the Communist Party USA. After endorsing Robert M. La Follette's presidential campaign in 1924, the party returned to independent action at the presidential level. It had modest growth in the early 1930s behind presidential candidate Norman Thomas. The party's appeal was weakened by the popularity of President Franklin D. Roosevelt's New Deal, the organization and flexibility of the Communist Party under Earl Browder and the resurgent labor movement's desire to support sympathetic Democratic Party politicians. A divisive and ultimately unsuccessful attempt to broaden the party by admitting followers of Leon Trotsky and Jay Lovestone caused the traditional "Old Guard" to leave and form the Social Democratic Federation. While the party was always strongly anti-fascist as well as anti-Stalinist, its opposition to American entry in World War II cost it both internal and external support. The party stopped running presidential candidates after 1956, when its nominee Darlington Hoopes won fewer than 6,000 votes. In the party's last decades, its members, many of them prominent in the labor, peace, civil rights and civil liberties movements, fundamentally disagreed about the socialist movement's relationship to the labor movement and the Democratic Party and about how best to advance democracy abroad. In 1970–1973, these strategic differences had become so acute that the Socialist Party of America changed its name to Social Democrats, USA. Leaders of two of its caucuses formed separate socialist organizations, the Democratic Socialist Organizing Committee and the Socialist Party USA, the former of which became a precursor to the largest socialist organization in the United States in 2017, the Democratic Socialists of America.
  • 3.0K
  • 18 Oct 2022
  • Page
  • of
  • 863

Other Entry Collections

>>