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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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De-Icing
De-icing is the process of removing snow, ice or frost from a surface. Anti-icing is understood to be the application of chemicals that not only de-ice but also remain on a surface and continue to delay the reformation of ice for a certain period of time, or prevent adhesion of ice to make mechanical removal easier.
  • 3.6K
  • 31 Oct 2022
Topic Review
Ahiṃsā
Ahimsa (also spelt Ahinsa) (Sanskrit: अहिंसा IAST: ahiṃsā, Pāli: avihiṃsā) ("nonviolence," although see Etymology below) is an ancient Indian principle of nonviolence which applies to all living beings. It is a key virtue in Hinduism, Buddhism and Jainism. Ahimsa is one of the cardinal virtues of Jainism, where it is first of the Pancha Mahavrata. It is also the first of the five precepts of Buddhism. Ahimsa is a multidimensional concept, inspired by the premise that all living beings have the spark of the divine spiritual energy; therefore, to hurt another being is to hurt oneself. Ahimsa has also been related to the notion that any violence has karmic consequences. While ancient scholars of Hinduism pioneered and refined the principles of Ahimsa, the concept also reached an extraordinary development in the ethical philosophy of Jainism. lord Parsvanatha, the twenty-third tirthankara of Jainism, revived and preached the concept of non-violence in the 8th century BCE. Mahaviraswami, the twenty-fourth and the last tirthankara further strengthened the idea in the 6th century BCE. Perhaps the most popular advocate of the principle of Ahimsa was Mahatma Gandhi. Ahimsa's precept of 'cause no injury' includes one's deeds, words, and thoughts. Classical Hindu texts like the Mahabharata and Ramayana, as well as modern scholars, debate principles of Ahimsa when one is faced with war and situations requiring self-defence. Historical Indian literature has in this way contributed to modern theories of Just War and self-defence.
  • 7.3K
  • 27 Oct 2022
Topic Review
Digital Strategy
Digital Strategy is a plan that uses digital resources to achieve one or more objectives. With technology changing at a very fast pace, Institutions have many digital resources to choose from based on what their overall goal is. Typically a plan that helps businesses, institutions, and brands, etc transform its course of action, operations, and activities, etc into digital nature to market their products, Analyse their consumer transactions or reduce operating cost, etc will be the digital strategy for that business, institution or brand. For e.g. brands at one point of time used print media advertisements for promoting its offers but now with the help of technology, social media is being used aggressively by brands to communicate their offerings to their respective consumers. 2019 was the first year in the history of humankind that witnessed brands. total advertising spent on social media crossed over the brand's total advertising spent on print media.
  • 1.1K
  • 27 Oct 2022
Topic Review
Zinc Deficiency
Zinc deficiency is defined either as insufficient zinc to meet the needs of the body, or as a serum zinc level below the normal range. However, since a decrease in the serum concentration is only detectable after long-term or severe depletion, serum zinc is not a reliable biomarker for zinc status. Common symptoms include increased rates of diarrhea. Zinc deficiency affects the skin and gastrointestinal tract; brain and central nervous system, immune, skeletal, and reproductive systems. Zinc deficiency in humans is caused by reduced dietary intake, inadequate absorption, increased loss, or increased body system use. The most common cause is reduced dietary intake. In the U.S., the Recommended Dietary Allowance (RDA) is 8 mg/day for women and 11 mg/day for men. The highest concentration of dietary zinc is found in oysters, meat, beans, and nuts. Increasing the amount of zinc in the soil and thus in crops and animals is an effective preventive measure. Zinc deficiency may affect up to 2 billion people worldwide.
  • 2.3K
  • 27 Oct 2022
Topic Review
Earnings before Interest, Taxes, Depreciation, and Amortization
A company's earnings before interest, taxes, depreciation, and amortization (commonly abbreviated EBITDA, pronounced /iːbɪtˈdɑː/, /əˈbɪtdɑː/, or /ˈɛbɪtdɑː/) is an accounting measure calculated using a company's earnings, before interest expenses, taxes, depreciation, and amortization are subtracted, as a proxy for a company's current operating profitability (i.e., how much profit it makes with its present assets and its operations on the products it produces and sells, as well as providing a proxy for cash flow). Though often shown on an income statement, it is not considered part of the Generally Accepted Accounting Principles (GAAP) by the SEC.
  • 1.5K
  • 27 Oct 2022
Topic Review
Relation (History of Concept)
The concept of relation as a term used in general philosophy has a long and complicated history. One of the interests for the Greek philosophers lay in the number of ways in which a particular thing might be described, and the establishment of a relation between one thing and another was one of these. A second interest lay in the difference between these relations and the things themselves. This was to culminate in the view that the things in themselves could not be known except through their relations. Debates similar to these continue into modern philosophy and include further investigations into types of relation and whether relations exist only in the mind or the real world or both. An understanding of types of relation is important to an understanding of relations between many things including those between people, communities and the wider world. Most of these are complex relations but of the simpler, analytical relations out of which they are formed there are generally held to be three types, although opinion on the number may differ. The three types are spatial relations which include geometry and number, relations of cause and effect, and the classificatory relations of similarity and difference that underlie knowledge. Going by different names in the sciences, mathematics, and the arts they can be thought of as three large families and it is the history of these that will be dealt with here.
  • 1.1K
  • 27 Oct 2022
Topic Review
Cyclic Quadrilateral
In Euclidean geometry, a cyclic quadrilateral or inscribed quadrilateral is a quadrilateral whose vertices all lie on a single circle. This circle is called the circumcircle or circumscribed circle, and the vertices are said to be concyclic. The center of the circle and its radius are called the circumcenter and the circumradius respectively. Other names for these quadrilaterals are concyclic quadrilateral and chordal quadrilateral, the latter since the sides of the quadrilateral are chords of the circumcircle. Usually the quadrilateral is assumed to be convex, but there are also crossed cyclic quadrilaterals. The formulas and properties given below are valid in the convex case. The word cyclic is from the Ancient Greek κύκλος (kuklos) which means "circle" or "wheel". All triangles have a circumcircle, but not all quadrilaterals do. An example of a quadrilateral that cannot be cyclic is a non-square rhombus. The section characterizations below states what necessary and sufficient conditions a quadrilateral must satisfy to have a circumcircle.
  • 11.9K
  • 27 Oct 2022
Topic Review
Electrocommunication
Electrocommunication is the communication method used by weakly-electric fish. Weakly-electric fish are a group of animals that utilize a communicating channel that is "invisible" to most other animals: electric signaling. Electric fish communicate by generating an electric field that a second individual receives with its electroreceptors. The fish interprets the message using the signal's frequencies, waveforms, delay, etc. The best studied species are two freshwater lineages- the African Mormyridae and the South American Gymnotiformes. While weakly-electric fish are the only group that have been identified to carry out both generation and reception of electric fields, other species either generate signals or receive them, but not both. Animals that either generate or receive electric fields are found only in wet or aquatic environments due to water's relatively low electrical resistance, compared to other substances (e.g. air). So far, communication between electric fish has been identified mainly to serve the purpose of conveying information such as: species courtship and biological sex motivational status (e.g. attack warning, submission, etc.) environmental conditions
  • 6.1K
  • 31 Oct 2022
Topic Review
Bayesian Inference in Motor Learning
Bayesian inference is a statistical tool that can be applied to motor learning, specifically to adaptation. Adaptation is a short-term learning process involving gradual improvement in performance in response to a change in sensory information. Bayesian inference is used to describe the way the nervous system combines this sensory information with prior knowledge to estimate the position or other characteristics of something in the environment. Bayesian inference can also be used to show how information from multiple senses (e.g. visual and proprioception) can be combined for the same purpose. In either case, Bayesian inference dictates that the estimate is most influenced by whichever information is most certain.
  • 743
  • 27 Oct 2022
Topic Review
History of Programming Languages
History of Programming Languages (HOPL) is an infrequent ACM SIGPLAN conference. Past conferences were held in 1978, 1993, and 2007. The fourth conference was originally intended to take place in June 2020, but has been postponed.
  • 1.8K
  • 27 Oct 2022
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