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Solar eclipse of December 13, 1974 | A partial solar eclipse occurred on December 13, 1974. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A partial solar eclipse occurs in the polar regions of the Earth when the center of the Moon's shadow misses the Earth. |
Kaniadakis distribution | In statistics, a Kaniadakis distribution (also known as κ-distribution) is a statistical distribution that emerges from the Kaniadakis statistics. There are several families of Kaniadakis distributions related to different constraints used in the maximization of the Kaniadakis entropy, such as the κ-Exponential distribution, κ-Gaussian distribution, Kaniadakis κ-Gamma distribution and κ-Weibull distribution. The κ-distributions have been applied for modeling a vast phenomenology of experimental statistical distributions in natural or artificial complex systems, such as, in epidemiology, quantum statistics, in astrophysics and cosmology, in geophysics, in economy, in machine learning.The κ-distributions are written as function of the κ-deformed exponential, taking the form exp κ(−βEi+βμ) enables the power-law description of complex systems following the consistent κ-generalized statistical theory., where exp κ(x)=(1+κ2x2+κx)1/κ is the Kaniadakis κ-exponential function. |
Usability | Usability can be described as the capacity of a system to provide a condition for its users to perform the tasks safely, effectively, and efficiently while enjoying the experience. In software engineering, usability is the degree to which a software can be used by specified consumers to achieve quantified objectives with effectiveness, efficiency, and satisfaction in a quantified context of use.The object of use can be a software application, website, book, tool, machine, process, vehicle, or anything a human interacts with. A usability study may be conducted as a primary job function by a usability analyst or as a secondary job function by designers, technical writers, marketing personnel, and others. It is widely used in consumer electronics, communication, and knowledge transfer objects (such as a cookbook, a document or online help) and mechanical objects such as a door handle or a hammer. |
Interstellar Wars | Interstellar Wars is a 1982 board game published by Attactix. |
Irbesartan | Irbesartan, sold under the brand name Avapro among others, is a medication used to treat high blood pressure, heart failure, and diabetic kidney disease. It is a reasonable initial treatment for high blood pressure. It is taken by mouth. Versions are available as the combination irbesartan/hydrochlorothiazide.Common side effects include dizziness, diarrhea, feeling tired, muscle pain, and heartburn. Serious side effects may include kidney problems, low blood pressure, and angioedema. Use in pregnancy may harm the baby and use when breastfeeding is not recommended. It is an angiotensin II receptor antagonist and works by blocking the effects of angiotensin II.Irbesartan was patented in 1990, and approved for medical use in 1997. It is available as a generic medication. In 2020, it was the 148th most commonly prescribed medication in the United States, with more than 4 million prescriptions. |
Kamaelia | Kamaelia is a free software/open source Python-based systems-development tool and concurrency framework produced by BBC Research & Development.
Kamaelia applications are produced by linking independent components together. These components communicate entirely through "inboxes" and "outboxes" (queues) largely removing the burdens of thread-safety and IPC from the developer. This also makes components reusable in different systems, allows easy unit testing and results in parallelism (between components) by default.
Components are generally implemented as generators - a method more light-weight than allocating a thread to each (though this is also supported). As a result, switching between the execution of components in Kamaelia systems is very fast.
Applications that have been produced using Kamaelia include a Freeview digital video recorder, a network-shared whiteboard, a 3D GUI, an HTTP Server, an audio mixer, a stream multicasting system and a simple BitTorrent client. |
Malvern Panalytical | Malvern Panalytical is a Spectris plc company. The company is a manufacturer and supplier of laboratory analytical instruments. It has been influential in the development of the Malvern Correlator, and it remains notable for its work in the advancement of particle sizing technology. The company produces technology for materials analysis and principal instruments designed to measure the size, shape and charge of particles. Additional areas of development include equipment for rheology measurements,chemical imaging and chromatography. In 2017, they merged with PANalytical to form Malvern Panalytical Ltd. |
Hush house | A hush house is an enclosed, noise-suppressed facility used for testing aircraft systems, including propulsion, mechanics, electronics, pneumatics, and others. Installed or uninstalled jet engines can be run under actual load conditions. |
Reliabilism | Reliabilism, a category of theories in the philosophical discipline of epistemology, has been advanced as a theory both of justification and of knowledge. Process reliabilism has been used as an argument against philosophical skepticism, such as the brain in a vat thought experiment.
Process reliabilism is a form of epistemic externalism. |
Cranioplasty | Cranioplasty is a surgical operation on the repairing of cranial defects caused by previous injuries or operations, such as decompressive craniectomy. It is performed by filling the defective area with a range of materials, usually a bone piece from the patient or a synthetic material. Cranioplasty is carried out by incision and reflection of the scalp after applying anaesthetics and antibiotics to the patient. The temporalis muscle is reflected, and all surrounding soft tissues are removed, thus completely exposing the cranial defect. The cranioplasty flap is placed and secured on the cranial defect. The wound is then sealed.Cranioplasty was closely related to trephination and the earliest operation is dated to 3000 BC. Currently, the procedure is performed for both cosmetic and functional purposes. Cranioplasty can restore the normal shape of the skull and prevent other complications caused by a sunken scalp, such as the "syndrome of the trephined". Cranioplasty is a risky operation, with potential risks such as bacterial infection and bone flap resorption. |
Enchant (software) | Enchant is a free software project developed as part of the AbiWord word processor with the aim of unifying access to the various existing spell-checker software. Enchant wraps a common set of functionality present in a variety of existing products/libraries, and exposes a stable API/ABI for doing so. Where a library doesn't implement some specific functionality, Enchant will emulate it. |
Place-permutation action | In mathematics, there are two natural interpretations of the place-permutation action of symmetric groups, in which the group elements act on positions or places. Each may be regarded as either a left or a right action, depending on the order in which one chooses to compose permutations. There are just two interpretations of the meaning of "acting by a permutation σ \sigma " but these lead to four variations, depending whether maps are written on the left or right of their arguments. The presence of so many variations often leads to confusion. When regarding the group algebra of a symmetric group as a diagram algebra it is natural to write maps on the right so as to compute compositions of diagrams from left to right. |
Rubidium chloride | Rubidium chloride is the chemical compound with the formula RbCl. This alkali metal halide salt is composed of rubidium and chlorine, and finds diverse uses ranging from electrochemistry to molecular biology. |
Pitchers (ceramic material) | Pitchers are pottery that has been broken in the course of manufacture. Biscuit (unglazed) pitchers can be crushed, ground and re-used, either as a low-percentage addition to the virgin raw materials on the same factory, or elsewhere as grog. Because of the adhering glaze, glost pitchers find less use. The crushed material can also be used in other industries as an inert filler. |
Evelyn effect | The Evelyn effect is defined as the phenomena in which the product ratios in a chemical reaction change as the reaction proceeds. This phenomenon contradicts the fundamental principle in organic chemistry by reactions always go by the lowest energy pathway. The favored product should remain so throughout a reaction run at constant conditions. However, the ratio of alkenes before the synthesis is complete shows that the favored product to is not the favored product. The basic idea here is that the proportions of the various alkene products changes as a function of time with a change in mechanism. |
Tyrosine kinase 2 | Non-receptor tyrosine-protein kinase TYK2 is an enzyme that in humans is encoded by the TYK2 gene.TYK2 was the first member of the JAK family that was described (the other members are JAK1, JAK2, and JAK3). It has been implicated in IFN-α, IL-6, IL-10 and IL-12 signaling. |
Uridine diphosphate N-acetylglucosamine | Uridine diphosphate N-acetylglucosamine or UDP-GlcNAc is a nucleotide sugar and a coenzyme in metabolism. It is used by glycosyltransferases to transfer N-acetylglucosamine residues to substrates. D-Glucosamine is made naturally in the form of glucosamine-6-phosphate, and is the biochemical precursor of all nitrogen-containing sugars. To be specific, glucosamine-6-phosphate is synthesized from fructose 6-phosphate and glutamine as the first step of the hexosamine biosynthesis pathway. The end-product of this pathway is UDP-GlcNAc, which is then used for making glycosaminoglycans, proteoglycans, and glycolipids.UDP-GlcNAc is extensively involved in intracellular signaling as a substrate for O-linked N-acetylglucosamine transferases (OGTs) to install the O-GlcNAc post-translational modification in a wide range of species. It is also involved in nuclear pore formation and nuclear signalling. OGTs and OG-ases play an important role in the structure of the cytoskeleton. In mammals, there is enrichment of OGT transcripts in the pancreas beta-cells, and UDP-GlcNAc is thought to be part of the glucose sensing mechanism. There is also evidence that it plays a part in insulin sensitivity in other cells. In plants, it is involved in the control of gibberellin production.Clostridium novyi type A alpha-toxin is an O-linked N-actetylglucosamine transferase acting on Rho proteins and causing the collapse of the cytoskeleton. |
Talking Machine News | Talking Machine News was an English trade publication dedicated to gramophones and gramophone records. |
96 equal temperament | In music, 96 equal temperament, called 96-TET, 96-EDO ("Equal Division of the Octave"), or 96-ET, is the tempered scale derived by dividing the octave into 96 equal steps (equal frequency ratios). Each step represents a frequency ratio of 96 , or 12.5 cents. Since 96 factors into 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, and 96, it contains all of those temperaments. Most humans can only hear differences of 6 cents on notes that are played sequentially, and this amount varies according to the pitch, so the use of larger divisions of octave can be considered unnecessary. Smaller differences in pitch may be considered vibrato or stylistic devices. |
Ancient Symbols (Unicode block) | Ancient Symbols is a Unicode block containing Roman characters for currency, weights, and measures. |
Trapper (ice hockey) | A trapper, also referred to as catch glove or simply glove, is a piece of equipment that an ice hockey goaltender wears on the non-dominant hand to assist in catching and stopping the puck. |
International Journal of Data Warehousing and Mining | The International Journal of Data Warehousing and Mining (IJDWM) is a quarterly peer-reviewed academic journal covering data warehousing and data mining. It was established in 2005 and is published by IGI Global. The editor-in-chief is David Taniar (Monash University, Australia). |
Philip Pilkington | Philip Pilkington is an Irish economist working in investment finance. He became well-known for his critiques of neoclassical economics on his blog Fixing the Economists. Since then he has written a book entitled The Reformation in Economics outlining these critiques, developed an empirical methodology to assess general equilibrium theory and created a new means to estimate both potential output and inflationary pressure in the labor market. |
Multichannel marketing | Multichannel marketing is the blending of different distribution and promotional channels for the purpose of marketing. Distribution channels include a retail storefront, a website, or a mail-order catalogue. |
Robert Swendsen | Robert Haakon Swendsen is Professor of Physics at Carnegie Mellon University. He is known in the computational physics community for the Swendsen-Wang algorithm, the Monte Carlo Renormalization Group and related methods that enable efficient computational studies of equilibrium phenomena near phase transitions. He is the 2014 Recipient of the Aneesur Rahman Prize for Computational Physics from the American Physical Society.Swendsen completed his undergraduate studies at Yale University and his PhD at University of Pennsylvania. |
Ralph-Johan Back | Ralph-Johan Back is a Finnish computer scientist. Back originated the refinement calculus, an important approach to the formal development of programs using stepwise refinement, in his 1978 PhD thesis at the University of Helsinki, On the Correctness of Refinement Steps in Program Development. He has undertaken much subsequent research in this area. He has held positions at CWI Amsterdam, the Academy of Finland and the University of Tampere. |
Streff syndrome | Streff syndrome is a vision condition primarily exhibited by children under periods of visual or emotional stress. |
End-of-Transmission-Block character | End-of-Transmission-Block (ETB) is a communications control character used to indicate the end of a block of data for communications purposes. ETB is used for segmenting data into blocks when the block structure is not necessarily related to the processing function.
In ASCII, ETB is code point 23 (0x17, or ^W in caret notation) in the C0 control code set. In EBCDIC, ETB is code point 0x26. |
Pine–cypress forest | Pine–cypress forest is a type of mixed conifer woodland in which at least one species of pine (genus Pinus) and one species of cypress (genus Cupressaceae) are present. Such forests are noted in several parts of the world, but are particularly well studied in Japan, and the United States. |
Alcohol dehydrogenase (cytochrome c) | Alcohol dehydrogenase (cytochrome c) (EC 1.1.2.8, type I quinoprotein alcohol dehydrogenase, quinoprotein ethanol dehydrogenase) is an enzyme with systematic name alcohol:cytochrome c oxidoreductase. This enzyme catalyses the following chemical reaction a primary alcohol + 2 ferricytochrome c ⇌ an aldehyde + 2 ferrocytochrome c + 2 H+A periplasmic PQQ-containing quinoprotein is present in Pseudomonas and Rhodopseudomonas. |
Electronic authentication | Electronic authentication is the process of establishing confidence in user identities electronically presented to an information system. Digital authentication, or e-authentication, may be used synonymously when referring to the authentication process that confirms or certifies a person's identity and works. When used in conjunction with an electronic signature, it can provide evidence of whether data received has been tampered with after being signed by its original sender. Electronic authentication can reduce the risk of fraud and identity theft by verifying that a person is who they say they are when performing transactions online.Various e-authentication methods can be used to authenticate a user's identify ranging from a password to higher levels of security that utilize multifactor authentication (MFA). Depending on the level of security used, the user might need to prove his or her identity through the use of security tokens, challenge questions, or being in possession of a certificate from a third-party certificate authority that attests to their identity. |
Magnesium oxide wallboard | Magnesium oxide, more commonly called magnesia, is a versatile mineral that when used as part of a cement mixture and cast into thin cement panels under proper curing procedures and practices can be used in residential and commercial building construction. Some versions are suitable for a wide range of general building uses and for applications that require fire resistance, mold and mildew control, as well as sound control applications and many other benefits. Magnesia board has strength and resistance due to very strong bonds between magnesium and oxygen atoms that form magnesium oxide crystals (with the chemical formula MgO). |
Netilmicin | Netilmicin (1-N-ethylsisomicin) is a semisynthetic aminoglycoside antibiotic, and a derivative of sisomicin, produced by Micromonospora inyoensis. Aminoglycoside antibiotics have the ability to kill a wide variety of bacteria. Netilmicin is not absorbed from the gut and is therefore only given by injection or infusion. It is only used in the treatment of serious infections particularly those resistant to gentamicin.
It was patented in 1973 and approved for medical use in 1981. It was approved for medical use in the UK in December 2019, for the treatment of external infections of the eye. It is on the World Health Organization's List of Essential Medicines. |
MIT OpenCourseWare | MIT OpenCourseWare (MIT OCW) is an initiative of the Massachusetts Institute of Technology (MIT) to publish all of the educational materials from its undergraduate- and graduate-level courses online, freely and openly available to anyone, anywhere. The project was announced on April 4, 2001, and uses Creative Commons Attribution-NonCommercial-ShareAlike license. The program was originally funded by the William and Flora Hewlett Foundation, the Andrew W. Mellon Foundation, and MIT. MIT OpenCourseWare is supported by MIT, corporate underwriting, major gifts, and donations from site visitors. The initiative inspired a number of other institutions to make their course materials available as open educational resources.As of May 2018, over 2,400 courses were available online. While a few of these were limited to chronological reading lists and discussion topics, a majority provided homework problems and exams (often with solutions) and lecture notes. Some courses also included interactive web demonstrations in Java, complete textbooks written by MIT professors, and streaming video lectures. |
Short-chain acyl-CoA dehydrogenase | Short-chain acyl-CoA dehydrogenase (EC 1.3.8.1, butyryl-CoA dehydrogenase, butanoyl-CoA dehydrogenase, butyryl dehydrogenase, unsaturated acyl-CoA reductase, ethylene reductase, enoyl-coenzyme A reductase, unsaturated acyl coenzyme A reductase, butyryl coenzyme A dehydrogenase, short-chain acyl CoA dehydrogenase, short-chain acyl-coenzyme A dehydrogenase, 3-hydroxyacyl CoA reductase, butanoyl-CoA:(acceptor) 2,3-oxidoreductase, ACADS (gene).) is an enzyme with systematic name short-chain acyl-CoA:electron-transfer flavoprotein 2,3-oxidoreductase. This enzyme catalyses the following chemical reaction a short-chain acyl-CoA + electron-transfer flavoprotein ⇌ a short-chain trans-2,3-dehydroacyl-CoA + reduced electron-transfer flavoproteinThis enzyme contains FAD as prosthetic group. |
ENQUIRE | ENQUIRE was a software project written in 1980 by Tim Berners-Lee at CERN, which was the predecessor to the World Wide Web. It was a simple hypertext program that had some of the same ideas as the Web and the Semantic Web but was different in several important ways.
According to Berners-Lee, the name was inspired by the title of an old how-to book, Enquire Within Upon Everything. |
Grey import vehicle | Grey import vehicles are new or used motor vehicles and motorcycles legally imported from another country through channels other than the maker's official distribution system or a third-party channel officially authorized by the manufacturer. The synonymous term parallel import is sometimes substituted.Car makers frequently arbitrage markets, setting the price according to local market conditions so the same vehicle will have different real prices in different territories. Grey import vehicles circumvent this profit-maximization strategy. Car makers and local distributors sometimes regard grey imports as a threat to their network of franchised dealerships, but independent distributors do not since more cars of an odd brand bring in money from service and spare parts.In order for the arbitrage to work, there must be some means to reduce, eliminate, or reverse whatever savings could be achieved by purchasing the car in the lower-priced territory. Examples of such barriers include regulations preventing import or requiring costly vehicle modifications. In some countries, such as Vietnam, the import of grey-market vehicles has largely been banned. |
Dual oxidase 2 | Dual oxidase 2, also known as DUOX2 or ThOX2 (for thyroid oxidase), is an enzyme that in humans is encoded by the DUOX2 gene. Dual oxidase is an enzyme that was first identified in the mammalian thyroid gland. In humans, two isoforms are found; hDUOX1 and hDUOX2 (this enzyme). The protein location is not exclusive to thyroid tissue; hDUOX1 is prominent in airway epithelial cells and hDUOX2 in the salivary glands and gastrointestinal tract. |
National Library of Medicine classification | The National Library of Medicine (NLM) classification system is a library indexing system covering the fields of medicine and preclinical basic sciences. The NLM classification is patterned after the Library of Congress (LC) Classification system: alphabetical letters denote broad subject categories which are subdivided by numbers. For example, QW 279 would indicate a book on an aspect of microbiology or immunology. |
Sitnikov problem | The Sitnikov problem is a restricted version of the three-body problem named after Russian mathematician Kirill Alexandrovitch Sitnikov that attempts to describe the movement of three celestial bodies due to their mutual gravitational attraction. A special case of the Sitnikov problem was first discovered by the American scientist William Duncan MacMillan in 1911, but the problem as it currently stands wasn't discovered until 1961 by Sitnikov. |
Electric track vehicle system | An electric track vehicle system (ETV) is a conveyor system for light goods transport. The system uses independently driven vehicles traveling on a monorail track network, consisting of straight track elements, bends, curves and transfer-units for changing of travel direction. Vehicles in an ETV system transport payloads up to 50 kg both vertical and horizontal in buildings and manufacturing plants. ETV systems were primarily put on the market in the sixties by German company Telelift. Later additional companies like Siemens or Thyssen engaged in this business. |
Solar eclipse of August 2, 2046 | A total solar eclipse will occur on Thursday, August 2, 2046. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is greater than the Sun's, blocking all direct sunlight. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. |
Food energy | Food energy is chemical energy that animals (including humans) derive from their food to sustain their metabolism, including their muscular activity.Most animals derive most of their energy from aerobic respiration, namely combining the carbohydrates, fats, and proteins with oxygen from air or dissolved in water. Other smaller components of the diet, such as organic acids, polyols, and ethanol (drinking alcohol) may contribute to the energy input. Some diet components that provide little or no food energy, such as water, minerals, vitamins, cholesterol, and fiber, may still be necessary to health and survival for other reasons. Some organisms have instead anaerobic respiration, which extracts energy from food by reactions that do not require oxygen. |
Legendre wavelet | In functional analysis, compactly supported wavelets derived from Legendre polynomials are termed Legendre wavelets or spherical harmonic wavelets. Legendre functions have widespread applications in which spherical coordinate system is appropriate. As with many wavelets there is no nice analytical formula for describing these harmonic spherical wavelets. The low-pass filter associated to Legendre multiresolution analysis is a finite impulse response (FIR) filter. |
Handgrip maneuver | The handgrip maneuver is performed by clenching one's fist forcefully for a sustained time until fatigued. Variations include squeezing an item such as a rolled up washcloth. |
Inferior colliculus | The inferior colliculus (IC) (Latin for lower hill) is the principal midbrain nucleus of the auditory pathway and receives input from several peripheral brainstem nuclei in the auditory pathway, as well as inputs from the auditory cortex. The inferior colliculus has three subdivisions: the central nucleus, a dorsal cortex by which it is surrounded, and an external cortex which is located laterally. Its bimodal neurons are implicated in auditory-somatosensory interaction, receiving projections from somatosensory nuclei. This multisensory integration may underlie a filtering of self-effected sounds from vocalization, chewing, or respiration activities.The inferior colliculi are part of the tectum of the midbrain, and together with the superior colliculi form the corpora quadrigemina. An inferior colliculus lies caudal/inferior to the ipsilateral superior colliculus, rostral/superior to the superior cerebellar peduncle and the trochlear nerve, and at the base of the projection of the medial geniculate nucleus and the lateral geniculate nucleus. |
HyperLogLog | HyperLogLog is an algorithm for the count-distinct problem, approximating the number of distinct elements in a multiset. Calculating the exact cardinality of the distinct elements of a multiset requires an amount of memory proportional to the cardinality, which is impractical for very large data sets. Probabilistic cardinality estimators, such as the HyperLogLog algorithm, use significantly less memory than this, but can only approximate the cardinality. The HyperLogLog algorithm is able to estimate cardinalities of > 109 with a typical accuracy (standard error) of 2%, using 1.5 kB of memory. HyperLogLog is an extension of the earlier LogLog algorithm, itself deriving from the 1984 Flajolet–Martin algorithm. |
Coronal rain | Coronal rain is a phenomenon that occurs in the Sun's corona when hot plasma cools and condenses in strong magnetic fields and falls to the photosphere. It is usually associated with active regions. |
NGD-4715 | NGD-4715 is a drug developed by Neurogen, which acts as a selective, non-peptide antagonist at the melanin concentrating hormone receptor MCH1. In animal models it has anxiolytic, antidepressant, and anorectic effects, and it has successfully passed Phase I clinical trials in humans.Neurogen was acquired by Ligand Pharmaceuticals in August, 2009, and NGD-4715 was not listed among its key assets. All four laboratories were closed and sold, and no employees were retained.The structure of NGD-4715 has been confused with for example 1-(5-bromo-6-methoxypyridin-2-yl)-4-(3,4-dimethoxybenzyl)piperazine. |
WorldBox | WorldBox is a sandbox game that was released in 2012 by Ukrainian indie game developer Maxim Karpenko. The game allows the use of different elements to create, change, and destroy virtual worlds. |
Hwb | Hwb is a website and collection of online tools provided to all schools in Wales by the Welsh Government. It was created in response to the 'Find it, Make it, Use it, Share it' report into Digital Learning in Wales.
Hwb provides access to tools such as Microsoft Office 365, Google Classroom, J2e, and Adobe Spark all free to students in Wales.
The main site contains over 88,000 bilingual resources that were transferred from NGfL Cymru. In addition teachers and learners with accounts can sign in and access a range of other online tools and resources. Included in this is a school specific Learning Platform (Hwb+). |
Elston–Stewart algorithm | The Elston–Stewart algorithm is an algorithm for computing the likelihood of observed data on a pedigree assuming a general model under which specific genetic segregation, linkage and association models can be tested. It is due to Robert Elston and John Stewart. It can handle relatively large pedigrees providing they are (almost) outbred. When used for linkage analysis its computation time is exponential in the number of markers, in contrast to the Lander-Green algorithm, which has computational time exponential in the number of pedigree members. |
Spark gap | A spark gap consists of an arrangement of two conducting electrodes separated by a gap usually filled with a gas such as air, designed to allow an electric spark to pass between the conductors. When the potential difference between the conductors exceeds the breakdown voltage of the gas within the gap, a spark forms, ionizing the gas and drastically reducing its electrical resistance. An electric current then flows until the path of ionized gas is broken or the current reduces below a minimum value called the "holding current". This usually happens when the voltage drops, but in some cases occurs when the heated gas rises, stretching out and then breaking the filament of ionized gas. Usually, the action of ionizing the gas is violent and disruptive, often leading to sound (ranging from a snap for a spark plug to thunder for a lightning discharge), light, and heat. |
Aquanaut | An aquanaut is any person who remains underwater, breathing at the ambient pressure for long enough for the concentration of the inert components of the breathing gas dissolved in the body tissues to reach equilibrium, in a state known as saturation. Usually this is done in an underwater habitat on the seafloor for a period equal to or greater than 24 continuous hours without returning to the surface. The term is often restricted to scientists and academics, though there were a group of military aquanauts during the SEALAB program. Commercial divers in similar circumstances are referred to as saturation divers. An aquanaut is distinct from a submariner, in that a submariner is confined to a moving underwater vehicle such as a submarine that holds the water pressure out. Aquanaut derives from the Latin word aqua ("water") plus the Greek nautes ("sailor"), by analogy to the similar construction "astronaut". |
System of systems engineering | System of systems engineering (SoSE) is a set of developing processes, tools, and methods for designing, re-designing and deploying solutions to system-of-systems challenges. |
Philips Nino | The Philips Nino is a so-called Palm-size PC, a predecessor to the Pocket PC platform. It was a PDA-style device with a stylus-operated touch screen. The Nino 200 and Nino 300 models had a monochrome screen while the Nino 500 had a color display. The Nino featured a Voice Control Software and Tegic T9. |
Advance Concrete | Advance Concrete is a computer-aided design (CAD) software application was developed by GRAITEC, but is now an Autodesk product, used for modeling and detailing reinforced concrete structures. Advance Concrete is used in the structural / civil engineering and drafting fields.
Advance Concrete was discontinued by Autodesk on January 31, 2017, with Revit as the suggested replacement. |
Goaltender mask | A goaltender mask, commonly referred to as a goalie mask, is a mask worn by goaltenders in a variety of sports to protect the head and face from injury from the ball or puck, as they constantly face incoming shots on goal. Some sports requiring their use include ice hockey, lacrosse, inline hockey, field hockey, rink hockey, ringette, bandy, rinkball, broomball, and floorball. This article deals chiefly with the goal masks used in ice hockey. |
H-TCP | H-TCP is another implementation of TCP with an optimized congestion control algorithm for high speed networks with high latency (LFN: Long Fat Networks). It was created by researchers at the Hamilton Institute in Ireland.
H-TCP is an optional module in Linux since kernel version 2.6, and has been implemented for FreeBSD 7. |
Sturge–Weber syndrome | Sturge–Weber syndrome, sometimes referred to as encephalotrigeminal angiomatosis, is a rare congenital neurological and skin disorder. It is one of the phakomatoses and is often associated with port-wine stains of the face, glaucoma, seizures, intellectual disability, and ipsilateral leptomeningeal angioma (cerebral malformations and tumors). Sturge–Weber syndrome can be classified into three different types. Type 1 includes facial and leptomeningeal angiomas as well as the possibility of glaucoma or choroidal lesions. Normally, only one side of the brain is affected. This type is the most common. Type 2 involvement includes a facial angioma (port wine stain) with a possibility of glaucoma developing. There is no evidence of brain involvement. Symptoms can show at any time beyond the initial diagnosis of the facial angioma. The symptoms can include glaucoma, cerebral blood flow abnormalities and headaches. More research is needed on this type of Sturge–Weber syndrome. Type 3 has leptomeningeal angioma involvement exclusively. The facial angioma is absent and glaucoma rarely occurs. This type is only diagnosed via brain scan.Sturge–Weber is an embryonal developmental anomaly resulting from errors in mesodermal and ectodermal development. Unlike other neurocutaneous disorders (phakomatoses), Sturge–Weber occurs sporadically (i.e., does not have a hereditary cause). It is caused by a mosaic, somatic activating mutation occurring in the GNAQ gene. Imaging findings may include tram track calcifications on CT, pial angiomatosis, and hemicerebral atrophy. |
Enterovirus D | Enterovirus D is a species of enterovirus which causes disease in humans. Five subtypes have been identified to date: Enterovirus 68: causes respiratory disease, and is associated with acute flaccid paralysis (AFP) – a disease similar to polio.
Enterovirus 70: causes outbreaks of acute hemorrhagic conjunctivitis.
Enterovirus 94: has been associated with a single case of AFP.
Enterovirus 111: has been associated with a single case of AFP, and has been found in primate feces.
Enterovirus 120: has only been found in non-human primate feces. |
Ostrich leather | Ostrich leather is the result of tanning skins taken from African ostriches farmed for their feathers, skin and meat. The leather is distinctive for its pattern of bumps or vacant quill follicles, ranged across a smooth field in varying densities. It requires an intricate, specialised and expensive production process making its aesthetic value costly.Although the first commercial farming began in South Africa in 1850, the industry collapsed after World War I and the drop in demand for the feathers for fashionable hats and military uniforms. Other products were marketed, with each success battered by world events and droughts until now, when ostrich skin is globally available and seen as a luxury item in high-end demand. |
Dwell time (transportation) | In transportation, dwell time or terminal dwell time refers to the time a vehicle such as a public transit bus or train spends at a scheduled stop without moving. Typically, this time is spent boarding or deboarding passengers, but it may also be spent waiting for traffic ahead to clear, trying to merge into parallel traffic, or idling time in order to get back on schedule. Dwell time is one common measure of efficiency in public transport, with shorter dwell times being universally desirable. |
Manganese(III) acetate | Manganese(III) acetate describes a family of materials with the approximate formula Mn(O2CCH3)3. These materials are brown solids that are soluble in acetic acid and water. They are used in organic synthesis as oxidizing agents. |
Line doubler | A line doubler is a device or algorithm used to deinterlace video signals prior to display on a progressive scan display. |
Deck lock | Deck lock is one of several systems for automatically securing rotorcraft on the Helicopter decks of small ships.A deck lock system was in use by the Royal Navy with its Westland Lynx aircraft, and presently with its AgustaWestland AW159 Wildcat helicopters. |
MindRDR | MindRDR is a Google Glass app created by This Place, a London, Seattle and Tokyo based user experience agency. MindRDR connects a Neurosky MindWave Mobile portable EEG monitor to Google Glass and uses the EEG signal to control functionality on Google Glass. |
Indolelactate dehydrogenase | In enzymology, an indolelactate dehydrogenase (EC 1.1.1.110) is an enzyme that catalyzes the chemical reaction (indol-3-yl)lactate + NAD+ ⇌ (indol-3-yl)pyruvate + NADH + H+Thus, the two substrates of this enzyme are (indol-3-yl)lactate and NAD+, whereas its 3 products are (indol-3-yl)pyruvate, NADH, and H+.
This enzyme belongs to the family of oxidoreductases, specifically those acting on the CH-OH group of donor with NAD+ or NADP+ as acceptor. The systematic name of this enzyme class is (indol-3-yl)lactate:NAD+ oxidoreductase. This enzyme is also called indolelactate:NAD+ oxidoreductase. This enzyme participates in tryptophan metabolism. |
Halfsies | Halfsies was a breakfast cereal manufactured by Quaker Oats from 1979 through 1984. It was the result of the so-called "sugar backlash" in which the amount of sugar in children's breakfast cereals became an issue. Its premise was that it contained half the sugar of regular breakfast cereals, and that it was half-corn and half-rice. The cereal nuggets were shaped as half a normal cereal ring, like the letter C. |
Snuba | Snuba is form of surface-supplied diving that uses an underwater breathing system developed by Snuba International. The origin of the word "Snuba" may be a portmanteau of "snorkel" and "scuba", as it bridges the gap between the two. Alternatively, some have identified the term as an acronym for "Surface Nexus Underwater Breathing Apparatus", though this may have been ascribed retroactively to fit the portmanteau. The swimmer uses swimfins, a diving mask, weights, and diving regulator as in scuba diving. |
Darlington transistor | In electronics, a multi-transistor configuration called the Darlington configuration (commonly called a Darlington pair) is a circuit consisting of two bipolar transistors with the emitter of one transistor connected to the base of the other, such that the current amplified by the first transistor is amplified further by the second one. The collectors of both transistors are connected together. This configuration has a much higher current gain than each transistor taken separately. It acts like and is often packaged as a single transistor. It was invented in 1953 by Sidney Darlington. |
False sharing | In computer science, false sharing is a performance-degrading usage pattern that can arise in systems with distributed, coherent caches at the size of the smallest resource block managed by the caching mechanism. When a system participant attempts to periodically access data that is not being altered by another party, but that data shares a cache block with data that is being altered, the caching protocol may force the first participant to reload the whole cache block despite a lack of logical necessity. The caching system is unaware of activity within this block and forces the first participant to bear the caching system overhead required by true shared access of a resource. |
Treponematosis | Treponematosis is a term used to individually describe any of the diseases caused by four members of the bacterial genus Treponema. The four diseases are collectively referred to as treponematoses: Syphilis (Treponema pallidum pallidum) Yaws (Treponema pallidum pertenue) Bejel (Treponema pallidum endemicum) Pinta (Treponema carateum)Traditional laboratory tests cannot distinguish the treponematoses. However, sequence differences among the T. pallidum subspecies have been identified. Molecular approaches involving PCR to identify these sequences are being developed. |
Automation technician | Automation technicians repair and maintain the computer-controlled systems and robotic devices used within industrial and commercial facilities to reduce human intervention and maximize efficiency. Their duties require knowledge of electronics, mechanics and computers. Automation technicians perform routine diagnostic checks on automated systems, monitor automated systems, isolate problems and perform repairs. If a problem occurs, the technician needs to be able to troubleshoot the issue and determine if the problem is mechanical, electrical or from the computer systems controlling the process. Once the issue has been diagnosed, the technician must repair or replace any necessary components, such as a sensor or electrical wiring. In addition to troubleshooting, Automation technicians design and service control systems ranging from electromechanical devices and systems to high-speed robotics and programmable logic controllers (PLCs). These types of systems include robotic assembly devices, conveyors, batch mixers, electrical distribution systems, and building automation systems. These machines and systems are often found within industrial and manufacturing plants, such as food processing facilities. Alternate job titles include field technician, bench technician, robotics technician, PLC technician, production support technician and maintenance technician. |
Sather | Sather is an object-oriented programming language. It originated circa 1990 at the International Computer Science Institute (ICSI) at the University of California, Berkeley, developed by an international team led by Steve Omohundro. It supports garbage collection and generics by subtypes.
Originally, it was based on Eiffel, but it has diverged, and now includes several functional programming features.
The name is inspired by Eiffel; the Sather Tower is a recognizable landmark at Berkeley, named after Jane Krom Sather, the widow of Peder Sather, who donated large sums to the foundation of the university.
Sather also takes inspiration from other programming languages and paradigms: iterators, design by contract, abstract classes, multiple inheritance, anonymous functions, operator overloading, contravariant type system. |
PF-592,379 | PF-592,379 is a drug developed by Pfizer which acts as a potent, selective and orally active agonist for the dopamine D3 receptor, which is under development as a potential medication for the treatment of female sexual dysfunction and male erectile dysfunction. Unlike some other less selective D3 agonists, a research study showed that PF-592,379 has little abuse potential in animal studies, and so was selected for further development and potentially human clinical trials. Development has since been discontinued. |
Endocannabinoid reuptake inhibitor | Endocannabinoid reuptake inhibitors (eCBRIs), also called cannabinoid reuptake inhibitors (CBRIs), are drugs which limit the reabsorption of endocannabinoid neurotransmitters by the releasing neuron. |
Trench drain | A trench drain (also channel drain, line drain, slot drain, linear drain or strip drain) is a specific type of floor drain containing a dominant trough- or channel-shaped body. It is used for the rapid evacuation of surface water or for the containment of utility lines or chemical spills. Employing a solid cover or grating that is flush with the adjoining surface, this drain is commonly made of concrete in-situ and may utilize polymer- or metal-based liners or a channel former to aid in channel crafting and slope formation. Characterized by its long length and narrow width, the cross-section of the drain is a function of the maximum flow volume anticipated from the surrounding surface. Channels can range from 1 inch (25 mm) to 2 feet in width, with depths that can reach 4 feet (120 cm). |
Krull–Akizuki theorem | In commutative algebra, the Krull–Akizuki theorem states the following: Let A be a one-dimensional reduced noetherian ring, K its total ring of fractions. Suppose L is a finite extension of K. If A⊂B⊂L and B is reduced, then B is a one-dimensional noetherian ring. Furthermore, for every nonzero ideal I of B, B/I is finite over A.Note that the theorem does not say that B is finite over A. The theorem does not extend to higher dimension. One important consequence of the theorem is that the integral closure of a Dedekind domain A in a finite extension of the field of fractions of A is again a Dedekind domain. This consequence does generalize to a higher dimension: the Mori–Nagata theorem states that the integral closure of a noetherian domain is a Krull domain. |
Molecular recognition feature | Molecular recognition features (MoRFs) are small (10-70 residues) intrinsically disordered regions in proteins that undergo a disorder-to-order transition upon binding to their partners. MoRFs are implicated in protein-protein interactions, which serve as the initial step in molecular recognition. MoRFs are disordered prior to binding to their partners, whereas they form a common 3D structure after interacting with their partners. As MoRF regions tend to resemble disordered proteins with some characteristics of ordered proteins, they can be classified as existing in an extended semi-disordered state. |
Train speed optimization | Train speed optimization, also known as Zuglaufoptimierung, is a system that reduces the need for trains to brake and accelerate, resulting in smoother and more efficient operation. |
Fab Tree Hab | The Fab Tree Hab is a hypothetical ecological home design developed at MIT in the early 2000s by Mitchell Joachim, Javier Arbona and Lara Greden. With the idea of easing the burden humanity places on the environment with conventional housing by growing "living, breathing" tree homes.It would be built by allowing native trees to grow over a computer-designed (CNC) removable plywood scaffold. Once the plants are interconnected and stable, the plywood would be removed and reused. MIT is experimenting with trees that grow quickly and develop an interwoven root structure that's soft enough to "train" over the scaffold, but then hardens into a more durable structure. The inside walls would be conventional clay and plaster. |
Neo-Freudianism | Neo-Freudianism is a psychoanalytic approach derived from the influence of Sigmund Freud but extending his theories towards typically social or cultural aspects of psychoanalysis over the biological.The neo-Freudian school of psychiatrists and psychologists were a group of loosely-linked American theorists/writers of the mid-20th century "who attempted to restate Freudian theory in sociological terms and to eliminate its connections with biology." |
French curve | A French curve is a template usually made from metal, wood or plastic composed of many different segments of the Euler spiral (aka the clothoid curve). It is used in manual drafting and in fashion design to draw smooth curves of varying radii. The curve is placed on the drawing material, and a pencil, knife or other implement is traced around its curves to produce the desired result. They were invented by the German mathematician Ludwig Burmester and are also known as Burmester (curve) set. |
Membraneless Fuel Cells | Membraneless Fuel Cells convert stored chemical energy into electrical energy without the use of a conducting membrane as with other types of Fuel Cells. In Laminar Flow Fuel Cells (LFFC) this is achieved by exploiting the phenomenon of non-mixing laminar flows where the interface between the two flows works as a proton/ion conductor. The interface allows for high diffusivity and eliminates the need for costly membranes. The operating principles of these cells mean that they can only be built to millimeter-scale sizes. The lack of a membrane means they are cheaper but the size limits their use to portable applications which require small amounts of power. |
Underwater survey | An underwater survey is a survey performed in an underwater environment or conducted remotely on an underwater object or region. Survey can have several meanings. The word originates in Medieval Latin with meanings of looking over and detailed study of a subject. One meaning is the accurate measurement of a geographical region, usually with the intention of plotting the positions of features as a scale map of the region. This meaning is often used in scientific contexts, and also in civil engineering and mineral extraction. Another meaning, often used in a civil, structural, or marine engineering context, is the inspection of a structure or vessel to compare actual condition with the specified nominal condition, usually with the purpose of reporting on the actual condition and compliance with, or deviations from, the nominal condition, for quality control, damage assessment, valuation, insurance, maintenance, and similar purposes. In other contexts it can mean inspection of a region to establish presence and distribution of specified content, such as living organisms, either to establish a baseline, or to compare with a baseline. |
Phases of fluorine | Fluorine forms diatomic molecules (F2) that are gaseous at room temperature with a density about 1.3 times that of air. Though sometimes cited as yellow-green, pure fluorine gas is actually a very pale yellow. The color can only be observed in concentrated fluorine gas when looking down the axis of long tubes, as it appears transparent when observed from the side in normal tubes or if allowed to escape into the atmosphere. The element has a "pungent" characteristic odor that is noticeable in concentrations as low as 20 ppb. |
Linolelaidic acid | Linolelaidic acid is an omega-6 trans fatty acid (TFA) and is a cis–trans isomer of linoleic acid. It is found in partially hydrogenated vegetable oils. It is a white (or colourless) viscous liquid.
TFAs are classified as conjugated and nonconjugated, corresponding usually to the structural elements −CH=CH−CH=CH− and −CH=CH−CH2−CH=CH−, respectively. Nonconjugated TFAs are represented by elaidic acid and linolelaidic acid. Their presence is linked heart diseases. The TFA vaccenic acid, which is of animal origin, poses less of a health risk. |
Code-break procedure | A code-break procedure is a set of rules which determine when planned unblinding should occur in a blinded experiment. FDA guidelines recommend that sponsors of blinded trials include a code-break procedure in their standard operating procedure. A code-break procedure should only allow a participant to be unblinded before the conclusion of a trial in the event of an emergency. Code-break usually refers to the unmasking of treatment allocation, but can refer to any form of unblinding. |
ISO 22300 | ISO 22300:2021, Security and resilience – Vocabulary, is an international standard developed by ISO/TC 292 Security and resilience. This document defines terms used in security and resilience standards and includes 360 terms and definitions. This edition was published in the beginning of 2021 and replaces the second edition from 2018. |
Directory Opus | Directory Opus (or "DOpus" as its users tend to call it) is a file manager program, originally written for the Amiga computer system in the early to mid-1990s. Commercial development on the version for the Amiga ceased in 1997. Directory Opus is still being actively developed and sold for the Microsoft Windows operating system by GPSoftware and there are open source releases of Directory Opus 4 and 5 for Amiga. |
Distal 18q- | Distal 18q- is a genetic condition caused by a deletion of genetic material within one of the two copies of chromosome 18. The deletion involves the distal section of 18q and typically extends to the tip of the long arm of chromosome 18. |
Emmetropia | Emmetropia is the state of vision in which a faraway object at infinity is in sharp focus with the ciliary muscle in a relaxed state. That condition of the normal eye is achieved when the refractive power of the cornea and eye lens and the axial length of the eye balance out, which focuses rays exactly on the retina, resulting in perfectly sharp distance vision. A human eye in a state of emmetropia requires no corrective lenses for distance; the vision scores well on a visual acuity test (such as an eye chart test).While emmetropia implies an absence of myopia, hyperopia, and other optical aberrations such as astigmatism, a less strict definition requires the spherical equivalent to be between -0.5 and +0.5 D and low enough aberrations such that 20/20 vision is achieved without correction. |
Java collections framework | The Java collections framework is a set of classes and interfaces that implement commonly reusable collection data structures.Although referred to as a framework, it works in a manner of a library. The collections framework provides both interfaces that define various collections and classes that implement them. |
IMG (file format) | IMG, in computing, refers to binary files with the .img filename extension that store raw disk images of floppy disks, hard drives, and optical discs or a bitmap image – .img. |
Nvidia NVDEC | Nvidia NVDEC (formerly known as NVCUVID) is a feature in its graphics cards that performs video decoding, offloading this compute-intensive task from the CPU.It is accompanied by NVENC for video encoding in Nvidia's Video Codec SDK. |
Biodyl | Biodyl is a trademark of Merial for a dietary supplement used in animals. It is manufactured in two formulations: a powder for use in an individual animal's drinking water, and an injectable solution. The injectable solution is available by veterinary prescription in some countries and over the counter in others. |
Putrescine N-hydroxycinnamoyltransferase | In enzymology, a putrescine N-hydroxycinnamoyltransferase (EC 2.3.1.138) is an enzyme that catalyzes the chemical reaction caffeoyl-CoA + putrescine ⇌ CoA + N-caffeoylputrescineThus, the two substrates of this enzyme are caffeoyl-CoA and putrescine, whereas its two products are CoA and N-caffeoylputrescine.
This enzyme belongs to the family of transferases, specifically those acyltransferases transferring groups other than aminoacyl groups. The systematic name of this enzyme class is caffeoyl-CoA:putrescine N-(3,4-dihydroxycinnamoyl)transferase. Other names in common use include caffeoyl-CoA putrescine N-caffeoyl transferase, PHT, putrescine hydroxycinnamoyl transferase, hydroxycinnamoyl-CoA:putrescine hydroxycinnamoyltransferase, and putrescine hydroxycinnamoyltransferase. |
Arachnid locomotion | Arachnid locomotion is the various means by which arachnids walk, run, or jump; they make use of more than muscle contraction, employing additional methods like hydraulic compression. Another adaptation seen especially in larger arachnid variants is inclusion of elastic connective tissues. |
Missile Impact Location System | The Missile Impact Location System or Missile Impact Locating System (MILS) is an ocean acoustic system designed to locate the impact position of test missile nose cones at the ocean's surface and then the position of the cone itself for recovery from the ocean bottom. The systems were installed in the missile test ranges managed by the U.S. Air Force.The systems were first installed in the Eastern Range, at the time the Atlantic Missile Range, and secondly in the Pacific, then known as the Pacific Missile Range. The Atlantic Missile Impact Location System and Pacific Missile Impact Location System were installed from 1958 through 1960. Design and development was by American Telephone and Telegraph Company (AT&T), with its Bell Laboratories research and Western Electric manufacturing elements and was to an extent based on the company's technology and experience developing and deploying the Navy's then classified Sound Surveillance System (SOSUS). Early studies were done at Bell Laboratories' Underwater Systems Development Department examined the problem then the Bell System's other organizations began implementation. The company and Navy assets that had installed the first phase of SOSUS, starting in 1951, were engaged on MILS installation and activation.MILS took several forms and each had a unique configuration based on purpose and local water column and bottom conditions. The target arrays were bottom fixed hydrophones connected by cable to the shore stations. A variant, Sonobuoy MILS (SMILS), was composed of bottom mounted hydrophones augmented by air dropped sonobuoys when in use. The third covered wide ocean areas with fixed hydrophones at distant shore sites was termed broad ocean area (BOA) MILS. All systems exploited the SOFAR channel, also known as the deep sound channel, for long range sound propagation in the ocean. |
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