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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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Very-High-Temperature Reactor
The very-high-temperature reactor (VHTR), or high-temperature gas-cooled reactor (HTGR), is a Generation IV reactor concept that uses a graphite-moderated nuclear reactor with a once-through uranium fuel cycle. The VHTR is a type of high-temperature reactor (HTR) that can conceptually have an outlet temperature of 1000 °C. The reactor core can be either a "prismatic block" (reminiscent of a conventional reactor core) or a "pebble-bed" core. The high temperatures enable applications such as process heat or hydrogen production via the thermochemical sulfur–iodine cycle.
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  • 16 Nov 2022
Topic Review
ExoMars Trace Gas Orbiter
The ExoMars Trace Gas Orbiter (TGO or ExoMars Orbiter) is a collaborative project between the European Space Agency (ESA) and Roscosmos that sent an atmospheric research orbiter and the Schiaparelli demonstration lander to Mars in 2016 as part of the European-led ExoMars programme. The Trace Gas Orbiter delivered the Schiaparelli lander on 16 October 2016, which crashed on the surface. The orbiter began aerobraking in March 2017 to lower its initial orbit of 200 by 98,000 km (120 by 60,890 mi). Aerobraking concluded on 20 February 2018 when a final thruster firing resulted in an orbit of 200 by 1,050 km (120 by 650 mi). Additional thruster firings every few days raised the orbiter to a circular "science" orbit of 400 km (250 mi), which was achieved on 9 April 2018. A key goal is to gain a better understanding of methane (CH4) and other trace gases present in the Martian atmosphere that could be evidence for possible biological activity. The programme will follow with the Surface Science Platform and the ExoMars rover in 2020, which will search for biomolecules and biosignatures; the TGO will operate as the communication link for the 2020 ExoMars rover and the Surface Science Platform and provide communication for other Mars surface probes with Earth.
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  • 16 Nov 2022
Topic Review
Blancpain
Blancpain SA (French pronunciation: ​[blɑ̃pɛ̃]) is a Swiss luxury watch manufacturer, headquartered in Paudex/Le Brassus, Switzerland . It designs, manufactures, distributes, and sells prestige and luxury mechanical watches. Founded by Jehan-Jacques Blancpain in Villeret, Switzerland in 1735, Blancpain is the oldest surviving watchmaking brand in the world. Blancpain has been a subsidiary of the Swiss Swatch Group since 1992, and is regarded as a top-tier Swatch brand. It is best known for its Fifty Fathoms diving watch introduced in 1953 and its 1735 Grande Complication wristwatch introduced in 1991.
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  • 16 Nov 2022
Biography
Barys Kit
Boris Uladzimiravich Kit (Belarusian: Бары́с Уладзімеравіч Кіт, Russian: Бори́с Влади́мирович Кит; April 6, 1910 – February 1, 2018) was a Belarusian-American rocket scientist. Kit was born on April 6, 1910 in Saint Petersburg, Russian Empire to the family of an employee at the Post and Telegraph Department of Belarusian origin. His true surname i
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  • 17 Nov 2022
Topic Review
Tether (Cryptocurrency)
Tether (often referred to by one of its currency codes, USD₮), is an asset-backed cryptocurrency stablecoin. It was launched by the company Tether Limited Inc. in 2014. Tether Limited is owned by the Hong Kong-based company iFinex Inc., which also owns the Bitfinex cryptocurrency exchange. As of July 2022, Tether Limited has minted the USDT stablecoin on ten protocols and blockchains. Tether is described as a stablecoin because it was originally designed to be valued at USD $1.00, with Tether Limited maintaining USD $1.00 of asset reserves for each USDT issued.
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  • 16 Nov 2022
Topic Review
Pliosaurus
Pliosaurus (meaning 'more lizard') is an extinct genus of thalassophonean pliosaurid known from the Kimmeridgian and Tithonian stages (Late Jurassic) of Europe and South America. Their diet would have included fish, cephalopods, and marine reptiles. This genus has contained many species in the past but recent reviews found only six (P. brachydeirus, P. carpenteri, P. funkei, P. kevani, P. rossicus and P. westburyensis) to be valid, while the validity of two additional species awaits a petition to the International Code of Zoological Nomenclature. Currently, P. brachyspondylus and P. macromerus are considered dubious, while P. portentificus is considered undiagnostic. Most species of Pliosaurus reached 8 metres (26 ft) in length and 5 metric tons (5.5 short tons) in body mass, while P. rossicus and P. funkei may have reached or even exceeded 10 metres (33 ft) in length and 11 metric tons (12 short tons) in body mass, being the largest plesiosaurs of all time. Species of this genus are differentiated from other pliosaurids based on seven autapomorphies, including teeth that are triangular in cross section.
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  • 16 Nov 2022
Topic Review
Chaos (Cosmogony)
Chaos (Ancient Greek:) refers to the void state preceding the creation of the universe or cosmos in the Greek creation myths, or to the initial "gap" created by the original separation of heaven and earth.
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  • 21 Nov 2022
Biography
Fred Hoyle
Sir Fred Hoyle FRS (24 June 1915 – 20 August 2001)[1] was an English astronomer who formulated the theory of stellar nucleosynthesis. He also held controversial stances on other scientific matters—in particular his rejection of the "Big Bang" theory, a term coined by him on BBC radio, and his promotion of panspermia as the origin of life on Earth.[2][3][4] He also wrote science fiction nove
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  • 17 Nov 2022
Topic Review
Grasshopper (Rocket)
Grasshopper and the Falcon 9 Reusable Development Vehicles (F9R Dev) were experimental flight test reusable rockets that performed vertical takeoffs and landings. The project was privately funded by SpaceX, with no funds provided by any government until later on. Two prototypes were built, and both were launched from the ground. Grasshopper was announced in 2011 and began low-altitude, low-velocity hover/landing testing in 2012. The initial Grasshopper test vehicle was 106 ft (32 m) tall and made eight successful test flights in 2012 and 2013 before being retired. A second Grasshopper-class prototype was the larger and more capable Falcon 9 Reusable Development Vehicle (F9R Dev, also known as F9R Dev1) based on the Falcon 9 v1.1 launch vehicle. It was tested at higher altitudes and was capable of much higher velocity but was never tested at high velocity. The F9R Dev1 vehicle was built in 2013–2014 and made its first low-altitude flight test on 17 April 2014; it was lost during a three-engine test at the McGregor test site on 22 August 2014, which ended the low-velocity test program. Further expansion of the flight test envelope for the reusable rocket was moved to descending Falcon 9 boosters that had been used on orbital flight trajectories on commercial orbital flights of the Falcon 9. The Grasshopper and F9R Dev tests were fundamental to the development of the reusable Falcon 9 and Falcon Heavy rockets, which require vertical landings of the near-empty Falcon 9 and Falcon Heavy first-stage booster tanks and engine assemblies. The Grasshopper and the F9R Dev tests led into a series of high-altitude, high-speed controlled-descent tests of post-mission (spent) Falcon 9 booster stages that accompanied the commercial Falcon 9 missions since September 2013. The latter eventually resulted in the first successful booster landing on 21 December 2015.
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  • 16 Nov 2022
Topic Review
Radar Configurations and Types
Radar configurations and types is an article about listing the different uses of radars.
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  • 16 Nov 2022
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