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Triangulation Station
A triangulation station, also known as a triangulation pillar, trigonometrical station, trigonometrical point, trig station, trig beacon, or trig point, and sometimes informally as a trig, is a fixed surveying station, used in geodetic surveying and other surveying projects in its vicinity. The nomenclature varies regionally: they are generally known as trigonometrical or triangulation stations in North America, trig points in the United Kingdom, trig pillars in Ireland, trig stations or points in Australia and New Zealand, and trig beacons in South Africa; triangulation pillar is the more formal term for the concrete columns found in the UK.
  • 6.6K
  • 02 Dec 2022
Topic Review
Matal V. Tam
Matal v. Tam, 582 U.S. ___ (2017) (previously known as Lee v. Tam), is a United States Supreme Court case in which the Court affirmed unanimously the judgment of the Court of Appeals for the Federal Circuit that the provisions of the Lanham Act's prohibiting the registration of trademarks that may "disparage" persons, institutions, beliefs, or national symbols with the United States Patent and Trademark Office violated the First Amendment.
  • 1.6K
  • 06 Dec 2022
Topic Review
Judicial Opinion
A judicial opinion is a form of legal opinion written by a judge or a judicial panel in the course of resolving a legal dispute, providing the decision reached to resolve the dispute, and usually indicating the facts which led to the dispute and an analysis of the law used to arrive at the decision.
  • 1.0K
  • 02 Dec 2022
Topic Review
STV Royston Grange
STV Royston Grange was a Houlder Line refrigerated cargo liner steamship that was built in England in 1959. In 1972 she collided with the tanker Tien Chee in the Río de la Plata. The resulting fire killed all 74 people aboard Royston Grange and eight people aboard Tien Chee. Royston Grange's burnt-out hulk was scrapped in Spain in 1979. Royston or Roystone Grange is an 18th-century farmstead next to the site of a medieval monastic grange at Ballidon in Derbyshire, England. Houlder Line had named ships after several English granges, including Royston, since the 1890s. This ship was the company's fifth and last Royston Grange.
  • 1.4K
  • 02 Dec 2022
Topic Review
AVIC UAVs
AVIC UAVs are Chinese UAVs developed by Aviation Industry Corporation of China (AVIC), some of which has entered service with Chinese military.
  • 1.3K
  • 02 Dec 2022
Topic Review
List of Starship Flights
Prototypes of the upper stage of the SpaceX Starship have been flown nine times. Designed and operated by private manufacturer SpaceX, the flown prototypes of Starship have been Starhopper, SN5, SN6, SN8, SN9, SN10, SN11, and SN15. Starship is planned to be a fully reusable super heavy-lift launch vehicle and unusual for previous launch vehicle and spacecraft designs, the upper stage of Starship is intended to function both as a second stage to reach orbital velocity on launches from Earth, and also be used in outer space as an on-orbit long-duration spacecraft.
  • 3.5K
  • 02 Dec 2022
Topic Review
Deformation Theory
In mathematics, deformation theory is the study of infinitesimal conditions associated with varying a solution P of a problem to slightly different solutions Pε, where ε is a small number, or vector of small quantities. The infinitesimal conditions are therefore the result of applying the approach of differential calculus to solving a problem with constraints. One might think, in analogy, of a structure that is not completely rigid, and that deforms slightly to accommodate forces applied from the outside; this explains the name. Some characteristic phenomena are: the derivation of first-order equations by treating the ε quantities as having negligible squares; the possibility of isolated solutions, in that varying a solution may not be possible, or does not bring anything new; and the question of whether the infinitesimal constraints actually 'integrate', so that their solution does provide small variations. In some form these considerations have a history of centuries in mathematics, but also in physics and engineering. For example, in the geometry of numbers a class of results called isolation theorems was recognised, with the topological interpretation of an open orbit (of a group action) around a given solution. Perturbation theory also looks at deformations, in general of operators.
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  • 02 Dec 2022
Topic Review
LOCAD
The Lab-on-a-Chip Applications Development (LOCAD) element is a set of related lab-on-a-chip projects at NASA. The projects develop integrated lab-on-a-chip products in three areas related to space exploration: Environmental Control and Life Systems Support (ECLSS), Medical Systems, and Remote Exploration. NASA conducts activities related to these projects both at NASA Marshall Space Flight Center and aboard the International Space Station (ISS).
  • 1.1K
  • 02 Dec 2022
Topic Review
Femme Fatale
A femme fatale (/ˌfæm fəˈtɑːl/ or /ˌfɛm fəˈtɑːl/; French: [fam fatal]), sometimes called a maneater, is a stock character of a mysterious and seductive woman whose charms ensnare her lovers, often leading them into compromising, dangerous, and deadly situations. She is an archetype of literature and art. Her ability to enchant and hypnotise her victim with a spell was in the earliest stories seen as being literally supernatural; hence, the femme fatale today is still often described as having a power akin to an enchantress, seductress, vampire, witch, or demon, having power over men. In American early 20th century film, femme fatale characters were referred to as vamps, an allusion to their role as sexual vampires. The phrase is French for "fatal woman". A femme fatale tries to achieve her hidden purpose by using feminine wiles such as beauty, charm, and sexual allure. In some situations, she uses lies or coercion rather than charm. She may also make use of some subduing weapon such as sleeping gas, a modern analog of magical powers in older tales. She may also be (or imply that she is) a victim, caught in a situation from which she cannot escape; The Lady from Shanghai (a 1947 film noir) is one such example. A younger version of a femme fatale is called a fille fatale, or "fatal girl". One of the most common traits of the femme fatale includes promiscuity and the "rejection of motherhood," seen as "one of her most threatening qualities since by denying his immortality and his posterity it leads to the ultimate destruction of the male." Femmes fatales are typically villainous, or at least morally ambiguous, and always associated with a sense of mystification, and unease.
  • 2.0K
  • 02 Dec 2022
Topic Review
Biological Carbon Fixation
Biological carbon fixation or сarbon assimilation is the process by which inorganic carbon (particularly in the form of carbon dioxide) is converted to organic compounds by living organisms. The compounds are then used to store energy and as structure for other biomolecules. Carbon is primarily fixed through photosynthesis, but some organisms use a process called chemosynthesis in the absence of sunlight. Organisms that grow by fixing carbon are called autotrophs, which include photoautotrophs (which use sunlight), and lithoautotrophs (which use inorganic oxidation). Heterotrophs are not themselves capable of carbon fixation but are able to grow by consuming the carbon fixed by autotrophs or other heterotrophs. "Fixed carbon", "reduced carbon", and "organic carbon" may all be used interchangeably to refer to various organic compounds. Chemosynthesis is carbon fixation driven by chemical energy, rather than from sunlight. Sulfur- and hydrogen-oxidizing bacteria often use the Calvin cycle or the reductive citric acid cycle.
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  • 02 Dec 2022
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