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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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Cheilitis
Cheilitis is a medical condition characterized by inflammation of the lips. The inflammation may include the perioral skin (the skin around the mouth), the vermilion border, or the labial mucosa. The skin and the vermilion border are more commonly involved, as the mucosa is less affected by inflammatory and allergic reactions. Cheilitis is a general term, and there are many recognized types and different causes. According to its onset and course, cheilitis can be either acute or chronic. Most cheilitis is caused by exogenous factors such as dryness (chapping) and acute sun exposure. Allergic tests may identify allergens that cause cheilitis.
  • 10.1K
  • 25 Nov 2022
Topic Review
Lattice Gauge Theory
In physics, lattice gauge theory is the study of gauge theories on a spacetime that has been discretized into a lattice. Gauge theories are important in particle physics, and include the prevailing theories of elementary particles: quantum electrodynamics, quantum chromodynamics (QCD) and particle physics' Standard Model. Non-perturbative gauge theory calculations in continuous spacetime formally involve evaluating an infinite-dimensional path integral, which is computationally intractable. By working on a discrete spacetime, the path integral becomes finite-dimensional, and can be evaluated by stochastic simulation techniques such as the Monte Carlo method. When the size of the lattice is taken infinitely large and its sites infinitesimally close to each other, the continuum gauge theory is recovered.
  • 1.1K
  • 25 Nov 2022
Topic Review
Targeted Killing
Targeted killing is defined as a form of murder or assassination carried out by governments. Some analysts believe that it is a modern euphemism for the assassination of a prominent individual by a state organization or institution outside a judicial procedure or a battlefield. Since the late 20th century, the legal status of targeted killing has become a subject of contention within and between various nations. Historically, at least since the mid-eighteenth century, Western thinking has generally considered the use of assassination as a tool of statecraft to be illegal. Some academics, military personnel and officials describe targeted killing as legitimate within the context of self-defense, when employed against terrorists or combatants engaged in asymmetrical warfare. They argue that drones are more humane and more accurate than manned vehicles, and that targeted or "named killings" do not occur in any context other than a declared state of war. Some twenty-six members of United States Congress, with academics such as Gregory Johnsen and Charles Schmitz, media figures (Jeremy Scahill, Glenn Greenwald, James Traub), civil rights groups (i.e. the American Civil Liberties Union) and ex-CIA station chief in Islamabad, Robert Grenier, have criticized targeted killings as a form of extrajudicial killings, which may be illegal under both United States and international law. According to statistical analyses provided by Reprieve, nine children have been killed for every adult the United States has tried to assassinate, and, in its numerous failed attempts to kill Ayman al-Zawahri, the CIA killed 76 children and 29 adult bystanders. Scholars are also divided as to whether targeted killings are an effective counterterrorism strategy.
  • 2.7K
  • 25 Nov 2022
Biography
Hans Geiger
Johannes Wilhelm "Hans" Geiger (30 September 1882 – 24 September 1945) was a German physicist. He is best known as the co-inventor of the detector component of the Geiger counter and for the Geiger–Marsden experiment which discovered the atomic nucleus. Geiger was born at Neustadt an der Haardt, Germany. He was one of five children born to the Indologist Wilhelm Ludwig Geiger, who was a pr
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  • 25 Nov 2022
Biography
Edgeworth David
Sir Tannatt William Edgeworth David KBE CMG DSO FRS (28 January 1858 – 28 August 1934) was a Welsh Australian geologist and Antarctic explorer. A household name in his lifetime, David's most significant achievements were discovering the major Hunter Valley coalfield in New South Wales and leading the first expedition to reach the South Magnetic Pole. He also served with distinction in World W
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  • 25 Nov 2022
Topic Review
Conservation and Restoration of Cultural Heritage
The conservation and restoration of cultural heritage focuses on protection and care of tangible cultural heritage, including artworks, architecture, archaeology, and museum collections. Conservation activities include preventive conservation, examination, documentation, research, treatment, and education. This field is closely allied with conservation science, curators and registrars.
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  • 25 Nov 2022
Biography
Max Abraham
Max Abraham (German: [ˈaːbʀaham]; 26 March 1875 – 16 November 1922) was a Germany physicist known for his work on electromagnetism and his opposition to the theory of relativity. Abraham was born in Danzig, Imperial Germany (now Gdańsk in Poland ) to a family of Jewish merchants. His father was Moritz Abraham and his mother was Selma Moritzsohn. Attending the University of Berlin, he st
  • 2.5K
  • 25 Nov 2022
Biography
Abraham Pais
Abraham Pais (/peɪs/; May 19, 1918 – July 28, 2000) was a Dutch-United States physicist and science historian. Pais earned his Ph.D. from University of Utrecht just prior to a Nazi ban on Jewish participation in Dutch universities during World War II. When the Nazis began the forced relocation of Dutch Jews, he went into hiding, but was later arrested and saved only by the end of the war.[1]
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  • 29 Nov 2022
Topic Review
Eyelash Curler
An eyelash curler is a hand-operated mechanical device for curling eyelashes for cosmetic purposes. Usually only the upper eyelashes are curled.
  • 11.5K
  • 25 Nov 2022
Biography
George C. Williams
George Christopher Williams (May 12, 1926 – September 8, 2010) was an United States evolutionary biologist.[1][2][3] Williams was a professor of biology at the State University of New York at Stony Brook who was best known for his vigorous critique of group selection. The work of Williams in this area, along with W. D. Hamilton, John Maynard Smith, Richard Dawkins, and others led to the devel
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  • 28 Nov 2022
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