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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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Crown Colony-Class Cruiser
The Crown Colony-class cruisers were a class of light cruisers of the Royal Navy named after Crown Colony of the British Empire. The first eight are known as the Fiji class, while the last three to be built are commonly referred to as the Ceylon class and were built to a slightly modified design.
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  • 24 Oct 2022
Topic Review
Polyunsaturated Fat
Polyunsaturated fats are fats in which the constituent hydrocarbon chain possesses two or more carbon–carbon double bonds. Polyunsaturated fat can be found mostly in nuts, seeds, fish, seed oils, and oysters. "Unsaturated" refers to the fact that the molecules contain less than the maximum amount of hydrogen (if there were no double bonds). These materials exist as cis or trans isomers depending on the geometry of the double bond. Saturated fats have hydrocarbon chains which can be most readily aligned. The hydrocarbon chains in trans fats align more readily than those in cis fats, but less well than those in saturated fats. In general, this means that the melting points of fats increase from cis to trans unsaturated and then to saturated. See the section about the chemical structure of fats for more information. The position of the carbon-carbon double bonds in carboxylic acid chains in fats is designated by Greek letters. The carbon atom closest to the carboxyl group is the alpha carbon, the next carbon is the beta carbon and so on. In fatty acids the carbon atom of the methyl group at the end of the hydrocarbon chain is called the omega carbon because omega is the last letter of the Greek alphabet. Omega-3 fatty acids have a double bond three carbons away from the methyl carbon, whereas omega-6 fatty acids have a double bond six carbons away from the methyl carbon. The illustration below shows the omega-6 fatty acid, linoleic acid. While it is the nutritional aspects of polyunsaturated fats that are generally of greatest interest, these materials also have non-food applications. Drying oils, which polymerize on exposure to oxygen to form solid films, are polyunsaturated fats. The most common ones are linseed (flax seed) oil, tung oil, poppy seed oil, perilla oil, and walnut oil. These oils are used to make paints and varnishes.
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  • 24 Oct 2022
Topic Review
Cellular Communication
Cellular communication is an umbrella term used in biology and more in depth in biophysics, biochemistry and biosemiotics to identify different types of communication methods between living cellulites. Some of the methods include cell signaling among others. This process allows millions of cells to communicate and work together to perform important bodily processes that are necessary for survival. Both multicellular and unicellular organisms heavily rely on cell-cell communication.
  • 1.8K
  • 24 Oct 2022
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Matrix Function
In mathematics, a matrix function is a function which maps a matrix to another matrix.
  • 749
  • 24 Oct 2022
Topic Review
Longchen Nyingthig
Longchen Nyingthig (Tibetan: ཀློང་ཆེན་སྙིང་ཐིག་, Wylie: klong chen snying thig) is a terma, revealed scripture, of the Nyingma school of Tibetan Buddhism, which gives a systematic explanation of Dzogchen. It was revealed by Jigme Lingpa (1730-1798).
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  • 26 Oct 2022
Topic Review
Dissociation
Dissociation in chemistry and biochemistry is a general process in which molecules (or ionic compounds such as salts, or complexes) separate or split into other things such as atoms, ions, or radicals, usually in a reversible manner. For instance, when an acid dissolves in water, a covalent bond between an electronegative atom and a hydrogen atom is broken by heterolytic fission, which gives a proton (H+) and a negative ion. Dissociation is the opposite of association or recombination.
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  • 24 Oct 2022
Topic Review
Critical Depth
In biological oceanography, 'Critical Depth' is defined as a hypothesized surface mixing depth at which phytoplankton growth is precisely matched by losses of phytoplankton biomass within this depth interval. This concept is useful for understanding the initiation of phytoplankton blooms.
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  • 24 Oct 2022
Topic Review
Banking as a Service
Banking as a Service (BaaS) (also: Banking-as-a-Service) is an end-to-end process ensuring the overall execution of a financial service provided over the Web. Such a digital banking service is available on demand and is carried out within a set time-frame.
  • 1.3K
  • 26 Oct 2022
Topic Review
Cornerstone
Cornerstone is a relational database for MS-DOS released by Infocom, a company best known in the 1980s for developing interactive fiction video games. Initially hailed upon release in 1985 for its ease of use, a series of shortcomings and changes in the market kept for Cornerstone from achieving success. It is generally considered a key factor in Infocom's demise.
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  • 24 Oct 2022
Topic Review
List of Countries by Distribution of Wealth
This is a list of countries by distribution of wealth, including Gini coefficients. Wealth distribution can vary greatly from income distribution in a country. See: List of countries by income equality. Higher Gini coefficients signify greater inequality in wealth distribution, with 0 being complete equality, whereas a value near 1 can arise in a situation where everybody has zero wealth except a very small minority. "The top 10 percent owned 71 percent of world wealth, and the Gini coefficient for the global distribution of wealth is estimated to be 0.804, indicating greater inequality than that observed in the global distribution of consumption or income."
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