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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Astrophotography
Astrophotography, also known as astronomical imaging, is the photography or imaging of astronomical objects, celestial events, or areas of the night sky. The first photograph of an astronomical object (the Moon) was taken in 1840, but it was not until the late 19th century that advances in technology allowed for detailed stellar photography. Besides being able to record the details of extended objects such as the Moon, Sun, and planets, modern astrophotography has the ability to image objects invisible to the human eye such as dim stars, nebulae, and galaxies. This is done by long time exposure since both film and digital cameras can accumulate and sum photons over these long periods of time. Photography using extended exposure-times revolutionized the field of professional astronomical research, recording hundreds of thousands of new stars, and nebulae invisible to the human eye. Specialized and ever-larger optical telescopes were constructed as essentially big cameras to record images on photographic plates. Astrophotography had an early role in sky surveys and star classification but over time it has given way to more sophisticated equipment and techniques designed for specific fields of scientific research, with image sensors becoming just one of many forms of sensor. Today, astrophotography is mostly a subdiscipline in amateur astronomy, usually seeking aesthetically pleasing images rather than scientific data. Amateurs use a wide range of special equipment and techniques.
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  • 22 Nov 2022
Biography
George Snyder
George Elmer Snyder (January 12, 1929 – April 5, 2017[1]) was an American politician, businessman, author, inventor, and marketing professional. He served in the Maryland State Senate from 1959 to 1974. Snyder served as the Majority leader of the Maryland Senate and was the Chairman of the Maryland Senate Finance Committee from 1971 to 1974. Born in Hagerstown, Maryland, Snyder attended Was
  • 1.4K
  • 24 Nov 2022
Biography
Kameshwar C. Wali
Kameshwar C. Wali (born October 15, 1927) is the Distinguished Research Professor of Physics Emeritus[1] at Syracuse University's College of Arts and Sciences. He is a specialist in high energy physics, particularly symmetries and dynamics of elementary particles,[2] and as the author[3] of Chandra: A Biography of S. Chandrasekhar[4] and Cremona Violins: a physicist's quest for the secrets of St
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  • 22 Nov 2022
Biography
Carole Goble
Carole Anne Goble, CBE FREng (born 10 April 1961) is a British academic who is Professor of Computer Science at the University of Manchester.[1] She is Principal Investigator (PI) of the myGrid,[2] BioCatalogue[3] and myExperiment[4] projects and co-leads the Information Management Group (IMG) with Norman Paton.[5] Goble was educated at Maidstone Grammar School for Girls.[6] Her academic care
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  • 23 Nov 2022
Topic Review
Timeline of STS-51-L
STS-51-L mission timeline is a detailed timeline of events from the ignition of Challenger's main engines to the remote destruction of the two Solid rocket boosters (SRBs), and includes a transcript of crew conversations from the cockpit voice recorder on board the orbiter. STS-51-L was the twenty-fifth flight in the American Space Shuttle program, and marked the first time a civilian had flown aboard the Space Shuttle. The mission used Space Shuttle Challenger, which lifted off from launch pad 39B (LC-39B) on January 28, 1986, from Kennedy Space Center, Florida. The mission ended in disaster following the destruction of Challenger 73 seconds after lift-off, because of the failure of an O-ring seals on Challenger's right solid rocket booster, which led to the rapid disintegration of the Space Shuttle stack from overwhelming aerodynamic pressures. The seven-member crew was killed when the crew compartment hit the Atlantic Ocean at 333 km/h (207 mph), after two and a half minutes of freefall.
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  • 22 Nov 2022
Biography
Denis Noble
Denis Noble CBE FRS FMedSci MAE[1] (born 16 November 1936) is a United Kingdom biologist who held the Burdon Sanderson Chair of Cardiovascular Physiology at the University of Oxford from 1984 to 2004 and was appointed Professor Emeritus and co-Director of Computational Physiology. He is one of the pioneers of systems biology and developed the first viable mathematical model of the working heart
  • 1.5K
  • 22 Nov 2022
Biography
Gordon Eugene Martin
Gordon Eugene Martin is a physicist and author in the field of piezoelectric materials for underwater sound transducers. He wrote early computer software automating iterative evaluation of direct computer models through a Jacobian matrix of complex numbers. His software enabled the Navy Electronics Laboratory (NEL) to accelerate design of sonar arrays for tracking Soviet Navy submarines during t
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  • 22 Nov 2022
Topic Review
Neutralization
In chemistry, neutralization or neutralisation (see spelling differences) is a chemical reaction in which acid and a base react quantitatively with each other. In a reaction in water, neutralization results in there being no excess of hydrogen or hydroxide ions present in the solution. The pH of the neutralized solution depends on the acid strength of the reactants.
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  • 22 Nov 2022
Biography
Dave Rubin
David Joshua Rubin (born June 26, 1976)[1] is an American political commentator and talk show host. He is the creator and host of The Rubin Report, a political talk show and podcast currently airing on YouTube and formerly part of The Young Turks Network[2] and Ora TV.[3] He previously hosted The Ben and Dave Show and The Six Pack, a podcast and radio show on Sirius XM Radio.[4] Topics Rubin fr
  • 4.0K
  • 22 Nov 2022
Topic Review
DC-BUS
DC-BUS is technology for reliable and economical communication over noisy DC or AC power lines. The DC-BUS was originally developed by Yamar Electronics Ltd. together with the DC-BUS Alliance, for low cost sub-networks in vehicles, using the battery lines for in-vehicle data communication. The DC-BUS converts the digital input data into phase modulated signals, protected against errors generated by noise over the powerline. On the receiving side, the received signal is demodulated into the original digital data. Gradually it became a popular means of communication in a plurality of applications within aerospace, automotive, solar energy management and lighting. It is also used as an alternative to RS-232 and RS-485 networks in some cases. The common goal for all these applications is reducing wires, saving space, lowering cost and increasing reliability.
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  • 22 Nov 2022
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