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Hadamard space | In geometry, an Hadamard space, named after Jacques Hadamard, is a non-linear generalization of a Hilbert space. In the literature they are also equivalently defined as complete CAT(0) spaces.
A Hadamard space is defined to be a nonempty complete metric space such that, given any points x and y, there exists a point m such that for every point z, The point m is then the midpoint of x and y: 2. |
Thiocyanic acid | Thiocyanic acid is a chemical compound with the formula HSCN and structure H−S−C≡N, which exists as a tautomer with isothiocyanic acid (H−N=C=S). The iso- form tends to dominate with the material being about 95% isothiocyanic acid in the vapor phase. |
Congruence lattice problem | In mathematics, the congruence lattice problem asks whether every algebraic distributive lattice is isomorphic to the congruence lattice of some other lattice. The problem was posed by Robert P. Dilworth, and for many years it was one of the most famous and long-standing open problems in lattice theory; it had a deep impact on the development of lattice theory itself. The conjecture that every distributive lattice is a congruence lattice is true for all distributive lattices with at most ℵ1 compact elements, but F. Wehrung provided a counterexample for distributive lattices with ℵ2 compact elements using a construction based on Kuratowski's free set theorem. |
Vitamalt | Vitamalt is a brand of non-alcoholic malt beverages manufactured and originated in Denmark and its taste might be described as sweet, unfermented beer. High on nutrients and vitamins, Vitamalt is a drink designed as an energy supplement. It is available in about 70 countries, but it is most widely known in the West Indies, where over time it has attained the status of a cultural symbol. The manufacturers have sponsored sporting events and clubs throughout the Caribbean. Cycling, running, basketball, football and amateur sports are activities that Vitamalt is usually associated with. |
Diffuser-augmented wind turbine | A diffuser-augmented wind turbine (DAWT) is a wind turbine modified with a cone-shaped wind diffuser that is used to increase the efficiency of converting wind power to electrical power. The increased efficiency is possible due to the increased wind speeds the diffuser can provide. In traditional bare turbines, the rotor blades are vertically mounted at the top of a support tower or shaft. In a DAWT, the rotor blades are mounted within the diffuser, which is then placed on the top of the support tower. Additional modifications can be made to the diffuser in order to further increase efficiency. |
Protofection | Protofection is a protein-mediated transfection of foreign mitochondrial DNA (mtDNA) into the mitochondria of cells in a tissue to supplement or replace the native mitochondrial DNA already present. The complete mtDNA genome or just fragments of mtDNA generated by polymerase chain reaction can be transferred into the target mitochondria through the technique.Scientists have hypothesized for the last couple of decades that protofection can be beneficial for patients with mitochondrial diseases. This technique is a recent development and is continuously being improved. As mitochondrial DNA becomes progressively more damaged with age, this may provide a method of at least partially rejuvenating mitochondria in old tissue, restoring them to their original, youthful function. |
Martingale (tack) | A martingale is any of several designs of tack that are used on horses to control head carriage. Martingales may be seen in a wide variety of equestrian disciplines, both riding and driving. Rules for their use vary widely; in some disciplines they are never used, others allow them for schooling but not in judged performance, and some organizations allow certain designs in competition. The two most common types of martingale, the standing and the running, are used to control the horse's head height, and to prevent the horse from throwing its head so high that the rider gets hit in the face by the horse's poll or upper neck. When a horse's head gets above a desired height, the martingale places pressure on the head so that it becomes more difficult or impossible to raise it higher. |
Tool and cutter grinder | A Tool and Cutter Grinder is used to sharpen milling cutters and tool bits along with a host of other cutting tools.
It is an extremely versatile machine used to perform a variety of grinding operations: surface, cylindrical, or complex shapes. The image shows a manually operated setup, however highly automated Computer Numerical Control (CNC) machines are becoming increasingly common due to the complexities involved in the process. |
Andrew Troelsen | Andrew W. Troelsen is currently a technology manager at Thomson Reuters in the Enterprise Content Platform (ECP - Big Data) division. He is an author of several books in the Microsoft technology space including books on Microsoft (D)COM, ATL, .NET, C#, VB (4.0 - modern) and COM & .NET Interoperability. His latest edition of his C# book covers the .NET Core platform and each C# 7.0 update. He has over 18 years experience authoring software development (3-5 day) workshops for engineers on MS platform technologies. |
Euphemism | A euphemism () is an innocuous word or expression used in place of one that is deemed offensive or suggests something unpleasant. Some euphemisms are intended to amuse, while others use bland, inoffensive terms for concepts that the user wishes to downplay. Euphemisms may be used to mask profanity or refer to topics some consider taboo such as disability, sex, excretion, or death in a polite way. |
PET100 | PET100 homolog is a protein that in humans is encoded by the PET100 gene. Mitochondrial complex IV, or cytochrome c oxidase, is a large transmembrane protein complex that is part of the respiratory electron transport chain of mitochondria. The small protein encoded by the PET100 gene plays a role in the biogenesis of mitochondrial complex IV. This protein localizes to the inner mitochondrial membrane and is exposed to the intermembrane space. Mutations in this gene are associated with mitochondrial complex IV deficiency. This gene has a pseudogene on chromosome 3. Alternative splicing results in multiple transcript variants. |
Reach cast | The reach cast is a casting technique used in fly fishing. The reach cast involves casting the fly lure over flowing water, such as a stream, and then just before the fly lands, moving the arm and fly rod in the upstream direction to arrange the fishing line so that it produces less apparent drag in the water. The technique allows the lure to more closely resemble a free-floating insect, resulting in greater chance of it being taken by a fish. Reach casting also allows an experienced caster to pitch curved casts in order to get the lures into difficult places.Reach casting is most commonly used in fishing freshwater streams for trout although the reach cast is also used in some saltwater fishing where one can stand in the shallows and there is a consistent current moving in one direction. |
Combustion chamber | A combustion chamber is part of an internal combustion engine in which the fuel/air mix is burned. For steam engines, the term has also been used for an extension of the firebox which is used to allow a more complete combustion process. |
Control array | In simple array is a group of consecutive memory location with same name and typeVisual Basic, a control array is a group of related controls in a Visual Basic form that share the same event handlers. Control arrays are always single-dimensional arrays, and controls can be added or deleted from control arrays at runtime. One application of control arrays is to hold menu items, as the shared event handler can be used for code common to all the menu items in the control array.Control arrays are a convenient way to handle groups of controls that perform a similar function. All the events available to the single control are still available to the array of controls, the only difference being an argument indicating the index of the selected array element is passed to the event. Hence, instead of writing individual procedures for each control (i.e. not using control arrays), you only have to write one procedure for each array. |
Dexel | The term Dexel has two common uses: Dexel ("depth pixel") is a concept used for a discretized representation of functions defined on surfaces used in geometrical modeling and physical simulation, sometimes also referred to as multilevel Z-map. Dexel is a nodal value of a scalar or vector field on a meshed surface. Dexels are used in simulation of manufacturing processes (such as turning, milling or rapid prototyping), when workpiece surfaces are subject to modifications. It is practical to express the surface evolution by dexels especially when the surface evolution scale is very different from the structural finite element 3D model discretization step (e.g. in machining the depth of cut variation is often several orders of magnitude smaller (1–10 µm) than the FE model mesh step (1 mm)). |
View synthesis | View synthesis aims to create new views of a specific subject starting from a number of pictures taken from given point of views.
Currently a study branch of Computer Science Research, Vision Research and Artificial Intelligence fields are involved in the definition of suitable approaches to the problem. |
Environmental impact-minimizing vehicle tuning | Environmental impact-minimizing vehicle tuning is the modification (or tuning) of cars to reduce energy consumption. |
Pickering series | The Pickering series (also known as the Pickering–Fowler series) consists of three lines of singly ionized helium found, usually in absorption, in the spectra of hot stars like Wolf–Rayet stars. The name comes from Edward Charles Pickering and Alfred Fowler. The lines are produced by transitions from a higher energy level of an electron to a level with principal quantum number n = 4. The lines have wavelengths: 4339 Å (n = 10 to n = 4) 4541 Å (n = 9 to n = 4) 4859 Å (n = 8 to n = 4) 5412 Å (n = 7 to n = 4) 6560 Å (n = 6 to n = 4) 10124 Å (n = 5 to n = 4)The transitions from the even-n states overlap with hydrogen lines and are therefore masked in typical absorption stellar spectra. However, they are seen in emission in the spectra of Wolf-Rayet stars, as these stars have little or no hydrogen. |
Lovevery | Lovevery is an American company producing play-kit subscription boxes for children. |
Enduro motorcycle | An enduro motorcycle is an off-road racing motorcycle used in enduros, which are long-distance cross-country, Trails, time trial competitions. |
Linopristin/flopristin | Linopristin/flopristin (development codes NXL103 and XRP 2868) is an experimental drug candidate under development by Novexel. It is an oral streptogramin antibiotic that has potent in vitro activity against certain Gram-positive bacteria including methicillin resistant Staphylococcus aureus (MRSA), as well as the important respiratory pathogens including penicillin-, macrolide- and quinolone-resistant strains. It is a combination of linopristin and flopristin. |
Exterior angle theorem | The exterior angle theorem is Proposition 1.16 in Euclid's Elements, which states that the measure of an exterior angle of a triangle is greater than either of the measures of the remote interior angles. This is a fundamental result in absolute geometry because its proof does not depend upon the parallel postulate. |
Peak bone mass | Peak bone mass is the maximum amount of bone a person has during their life. It typically occurs in the early 20s in females and late 20s in males. Peak bone mass is typically lower in females than males, and is also lower in White people and Asians compared to black populations. A way to determine bone mass is to look at the size and density of the mineralized tissue in the periosteal envelope and using the bone mineral density (BMD) of a person can determine the strength of that bone. Research has shown that puberty affects bone size much more because during this time males typically undergo a longer bone maturation period than women which is why women are more prone to osteoporosis than men. |
Right ascension | Right ascension (abbreviated RA; symbol α) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the March equinox to the (hour circle of the) point in question above the earth. When paired with declination, these astronomical coordinates specify the location of a point on the celestial sphere in the equatorial coordinate system. |
Bach's algorithm | Bach's algorithm is a probabilistic polynomial time algorithm for generating random numbers along with their factorizations, named after its discoverer, Eric Bach. It is of interest because no algorithm is known that efficiently factors numbers, so the straightforward method, namely generating a random number and then factoring it, is impractical.
The algorithm performs, in expectation, O(log n) primality tests.
A simpler, but less efficient algorithm (performing, in expectation, log 2n) primality tests), is due to Adam Kalai.Bach's algorithm may theoretically be used within cryptographic algorithms. |
1602 AM | Copies of the World Radio TV Handbook (including the 1991 edition) have identified 1602 kHz as a local frequency, akin to the Class C (former Class IV) radio stations in North America which are limited to 1kW.
The following radio stations broadcast on AM frequency 1602 kHz: |
Pollenizer | A pollenizer (or polleniser), sometimes pollinizer (or polliniser, see spelling differences) is a plant that provides pollen.
The word pollinator is often used when pollenizer is more precise. A pollinator is the biotic agent that moves the pollen, such as bees, moths, bats, and birds. Bees are thus often referred to as 'pollinating insects'.
The verb form to pollenize is to be the source of pollen, or to be the sire of the next plant generation. |
Gateway Handbook | The HandBook was a very small and lightweight subnotebook originally introduced by Gateway 2000 in 1992. It quickly achieved critical acclaim and a cult-like following, especially in Japan.
It was designed by IQV and Tottori Sanyo and manufactured by Tottori Sanyo in Japan. The lead engineer on the product was Howard Fullmer and other significant contributors included Bob Burnett and Rick Murayama. |
Nucleogenic | A nucleogenic isotope, or nuclide, is one that is produced by a natural terrestrial nuclear reaction, other than a reaction beginning with cosmic rays (the latter nuclides by convention are called by the different term cosmogenic). The nuclear reaction that produces nucleogenic nuclides is usually interaction with an alpha particle or the capture of fission or thermal neutrons. Some nucleogenic isotopes are stable and others are radioactive. |
Geophagia | Geophagia (), also known as geophagy (), is the intentional practice of eating earth or soil-like substances such as clay, chalk, or termite mounds. It is a behavioural adaptation that occurs in many non-human animals and has been documented in more than 100 primate species. Geophagy in non-human primates is primarily used for protection from parasites, to provide mineral supplements and to help metabolize toxic compounds from leaves. Geophagy also occurs in humans and is most commonly reported among children and pregnant women.Human geophagia is a form of pica – the craving and purposive consumption of non-food items – and is classified as an eating disorder in the Diagnostic and Statistical Manual of Mental Disorders (DSM) if not socially or culturally appropriate. Sometimes geophagy is a consequence of carrying a hookworm infection. Although its etiology remains unknown, geophagy has many potential adaptive health benefits as well as negative consequences. |
Beer boot | A beer boot (German: Bierstiefel) is a boot-shaped beer glass. Beer boots exist in sizes ranging from 0.5 litres (17 US fl oz) up to 5 litres (1+3⁄8 US gal), but 2 litres (1⁄2 US gal) is a more typical size. Beer boots are commonly consumed communally and are popular with younger people as part of drinking games. |
Muscle relaxant | A muscle relaxant is a drug that affects skeletal muscle function and decreases the muscle tone. It may be used to alleviate symptoms such as muscle spasms, pain, and hyperreflexia. The term "muscle relaxant" is used to refer to two major therapeutic groups: neuromuscular blockers and spasmolytics. Neuromuscular blockers act by interfering with transmission at the neuromuscular end plate and have no central nervous system (CNS) activity. They are often used during surgical procedures and in intensive care and emergency medicine to cause temporary paralysis. Spasmolytics, also known as "centrally acting" muscle relaxant, are used to alleviate musculoskeletal pain and spasms and to reduce spasticity in a variety of neurological conditions. While both neuromuscular blockers and spasmolytics are often grouped together as muscle relaxant, the term is commonly used to refer to spasmolytics only. |
Time Stamp Counter | The Time Stamp Counter (TSC) is a 64-bit register present on all x86 processors since the Pentium. It counts the number of CPU cycles since its reset. The instruction RDTSC returns the TSC in EDX:EAX. In x86-64 mode, RDTSC also clears the upper 32 bits of RAX and RDX. Its opcode is 0F 31. Pentium competitors such as the Cyrix 6x86 did not always have a TSC and may consider RDTSC an illegal instruction. Cyrix included a Time Stamp Counter in their MII. |
Transposition of the great vessels | Transposition of the great vessels (TGV) is a group of congenital heart defects involving an abnormal spatial arrangement of any of the great vessels: superior and/or inferior venae cavae, pulmonary artery, pulmonary veins, and aorta. Congenital heart diseases involving only the primary arteries (pulmonary artery and aorta) belong to a sub-group called transposition of the great arteries (TGA), which is considered the most common congenital heart lesion that presents in neonates. |
Código F.A.M.A. | Código F.A.M.A. is the first reality television show for children in Mexico. |
Indole-3-acetaldehyde reductase (NADPH) | In enzymology, an indole-3-acetaldehyde reductase (NADPH) (EC 1.1.1.191) is an enzyme that catalyzes the chemical reaction (indol-3-yl)ethanol + NADP+ ⇌ (indol-3-yl)acetaldehyde + NADPH + H+Thus, the two substrates of this enzyme are (indol-3-yl)ethanol and NADP+, whereas its 3 products are (indol-3-yl)acetaldehyde, NADPH, 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)ethanol:NADP+ oxidoreductase. Other names in common use include indoleacetaldehyde (reduced nicotinamide adenine dinucleotide, phosphate) reductase, indole-3-acetaldehyde reductase (NADPH), and indole-3-ethanol:NADP+ oxidoreductase. This enzyme participates in tryptophan metabolism. |
Polaroid art | Polaroid art is a type of alternative photography which consists of modifying an instant picture, usually while it is being developed. The most common types of Polaroid art are the emulsion lift, the Polaroid transfer and emulsion manipulation. |
Canadian Bioinformatics Workshops | Canadian Bioinformatics Workshops (CBW) are a series of advanced training workshops in bioinformatics, founded in 1999 in response to an identified need for a skilled bioinformatics workforce in Canada. |
Tenoroon | The tenor bassoon or tenoroon is a member of the bassoon family of double reed woodwind instruments. Similar to the alto bassoon, also called octave bassoon, it is relatively rare. |
Driving factors | In energy monitoring and targeting, a driving factor is something recurrent and measurable whose variation explains variation in energy consumption. The term independent variable is sometimes used as a synonym. |
Topology (electrical circuits) | The circuit topology of an electronic circuit is the form taken by the network of interconnections of the circuit components. Different specific values or ratings of the components are regarded as being the same topology. Topology is not concerned with the physical layout of components in a circuit, nor with their positions on a circuit diagram; similarly to the mathematical concept of topology, it is only concerned with what connections exist between the components. There may be numerous physical layouts and circuit diagrams that all amount to the same topology. |
Online quiz | Online quizzes are quizzes that are published on the Internet and are generally for entertainment purposes. |
PLCB3 | 1-Phosphatidylinositol-4,5-bisphosphate phosphodiesterase beta-3 is an enzyme that in humans is encoded by the PLCB3 gene.The gene codes for the enzyme phospholipase C β3. The enzyme catalyzes the formation of inositol 1,4,5-trisphosphate and diacylglycerol from phosphatidylinositol 4,5-bisphosphate. This reaction uses calcium as a cofactor and plays an important role in the intracellular transduction of many extracellular signals. This gene is activated by two G-protein alpha subunits, alpha-q and alpha-11, as well as G-beta gamma subunits. |
Table of prime factors | The tables contain the prime factorization of the natural numbers from 1 to 1000.
When n is a prime number, the prime factorization is just n itself, written in bold below.
The number 1 is called a unit. It has no prime factors and is neither prime nor composite. |
Standard cubic feet per minute | Standard cubic feet per minute (SCFM) is the molar flow rate of a gas expressed as a volumetric flow at a "standardized" temperature and pressure thus representing a fixed number of moles of gas regardless of composition and actual flow conditions. It is related to the mass flow rate of the gas by a multiplicative constant which depends only on the molecular weight of the gas. There are different standard conditions for temperature and pressure, so care is taken when choosing a particular standard value. Worldwide, the "standard" condition for pressure is variously defined as an absolute pressure of 101,325 pascals (Atmospheric pressure), 1.0 bar (i.e., 100,000 pascals), 14.73 psia, or 14.696 psia and the "standard" temperature is variously defined as 68 °F, 60 °F, 0 °C, 15 °C, 20 °C, or 25 °C. The relative humidity (e.g., 36% or 0%) is also included in some definitions of standard conditions. |
Lapsed listener problem | In computer programming, the lapsed listener problem is a common source of memory leaks for object-oriented programming languages, among the most common ones for garbage collected languages.It originates in the observer pattern, where observers (or listeners) register with a subject (or publisher) to receive events. In basic implementation, this requires both explicit registration and explicit deregistration, as in the dispose pattern, because the subject holds strong references to the observers, keeping them alive. The leak happens when an observer fails to unsubscribe from the subject when it no longer needs to listen. Consequently, the subject still holds a reference to the observer which prevents it from being garbage collected — including all other objects it is referring to — for as long as the subject is alive, which could be until the end of the application. |
Neurotensin receptor 1 | Neurotensin receptor type 1 is a protein that in humans is encoded by the NTSR1 gene. For a crystal structure of NTS1, see pdb code 4GRV. In addition, high-resolution crystal structures have been determined in complex with the peptide full agonist NTS8-13, the non-peptide full agonist SRI-9829, the partial agonist RTI-3a, and the antagonists / inverse agonists SR48692 and SR142948A, as well as in the ligand-free apo state., see PDB codes 6YVR (NTSR1-H4X:NTS8–13), 6Z4V (NTSR1-H4bmX:NTS8–13), 6Z8N (NTSR1-H4X:SRI-9829), 6ZA8 (NTSR1-H4X:RTI-3a), 6Z4S (NTSR1-H4bmX:SR48692), 6ZIN (NTSR1-H4X:SR48692), 6Z4Q (NTSR1-H4X: SR142948A), and 6Z66 (apo NTSR1-H4X). |
Computational Infrastructure for Geodynamics | The Computational Infrastructure for Geodynamics (CIG) is a community-driven organization that advances Earth science by developing and disseminating software for geophysics and related fields. It is a National Science Foundation-sponsored collaborative effort to improve geodynamic modelling and develop, support, and disseminate open-source software for the geodynamics research and higher education communities.
CIG is located at the University of California, Davis, and is a member-governed consortium with 62 US institutional members and 15 international affiliates. |
Pseudomon-1 RNA motif | The Pseudomon-1 RNA motif is a conserved RNA identified by bioinformatics. It is used by most species whose genomes have been sequenced and that are classified within the genus Pseudomonas, and is also present in Azotobacter vinelandii, a closely related species. It is presumed to function as a non-coding RNA. Pseudomon-1 RNAs consistently have a downstream rho-independent transcription terminator. |
Liquid crystal on silicon | Liquid crystal on silicon (LCoS or LCOS) is a miniaturized reflective active-matrix liquid-crystal display or "microdisplay" using a liquid crystal layer on top of a silicon backplane. It is also referred to as a spatial light modulator. LCoS was initially developed for projection televisions but is now used for wavelength selective switching, structured illumination, near-eye displays and optical pulse shaping. By way of comparison, some LCD projectors use transmissive LCD, allowing light to pass through the liquid crystal. |
2,5-Dimethoxy-4-trifluoromethylamphetamine | 2,5-Dimethoxy-4-trifluoromethylamphetamine (DOTFM) is a psychedelic drug of the phenethylamine and amphetamine chemical classes. It was first synthesized in 1994 by a team at Purdue University led by David E. Nichols. DOTFM is the alpha-methylated analogue of 2C-TFM, and is around twice as potent in animal studies. It acts as an agonist at the 5HT2A and 5HT2C receptors. In drug-substitution experiments in rats, DOTFM fully substituted for LSD and was slightly more potent than DOI. |
Cypress forest | A Cypress forest is a western United States plant association typically dominated by one or more cypress species. Example species comprising the canopy include Cupressus macrocarpa. In some cases these forests have been severely damaged by goats, cattle and other grazing animals. While cypress species are clearly dominant within a Cypress forest, other trees such as California Buckeye, Aesculus californica, are found in some Cypress forests. |
Subaerial eruption | A subaerial eruption is any sort of volcanic eruption that occurs on the Earth's surface, or in the open air "under the air", and not underwater or underground. They generally produce pyroclastic flows, lava fountains and lava flows, which are commonly classified in different subaerial eruption types, including Plinian, Peléan and Hawaiian eruptions. Subaerial eruptions contrast with subaqueous, submarine and subglacial eruptions which all originate below forms of a water surface. |
Oxygen rebound mechanism | In biochemistry, the oxygen rebound mechanism is the pathway for hydroxylation of organic compounds by iron-containing oxygenases. Many enzymes effect the hydroxylation of hydrocarbons as a means for biosynthesis, detoxification, gene regulation, and other functions. These enzymes often utilize Fe-O centers that convert C-H bonds into C-OH groups. The oxygen rebound mechanism starts with abstraction of H from the hydrocarbon, giving an organic radical and an iron hydroxide. In the rebound step, the organic radical attacks the Fe-OH center to give an alcohol group, which is bound to Fe as a ligand. Dissociation of the alcohol from the metal allows the cycle to start anew. This mechanistic scenario is an alternative to the direct insertion of an O center into a C-H bond. The pathway is an example of C-H activation. |
Royale (brand) | Royale is a Canadian brand of consumer household paper products such as facial tissue, bathroom tissue, paper towel, and paper napkins. |
Clinical formulation | A clinical formulation, also known as case formulation and problem formulation, is a theoretically-based explanation or conceptualisation of the information obtained from a clinical assessment. It offers a hypothesis about the cause and nature of the presenting problems and is considered an adjunct or alternative approach to the more categorical approach of psychiatric diagnosis. In clinical practice, formulations are used to communicate a hypothesis and provide framework for developing the most suitable treatment approach. It is most commonly used by clinical psychologists and is deemed to be a core component of that profession. Mental health nurses, social workers, and some psychiatrists may also use formulations. |
Interpolation inequality | In the field of mathematical analysis, an interpolation inequality is an inequality of the form ‖u0‖0≤C‖u1‖1α1‖u2‖2α2…‖un‖nαn,n≥2, where for 0≤k≤n , uk is an element of some particular vector space Xk equipped with norm ‖⋅‖k and αk is some real exponent, and C is some constant independent of u0,..,un . The vector spaces concerned are usually function spaces, and many interpolation inequalities assume u0=u1=⋯=un and so bound the norm of an element in one space with a combination norms in other spaces, such as Ladyzhenskaya's inequality and the Gagliardo-Nirenberg interpolation inequality, both given below. Nonetheless, some important interpolation inequalities involve distinct elements u0,..,un , including Hölder's Inequality and Young's inequality for convolutions which are also presented below. |
Good spanning tree | In the mathematical field of graph theory, a good spanning tree T of an embedded planar graph G is a rooted spanning tree of G whose non-tree edges satisfy the following conditions. |
Thalamocortical radiations | In neuroanatomy, thalamocortical radiations also known as thalamocortical fibres, are the efferent fibres that project from the thalamus to distinct areas of the cerebral cortex. They form fibre bundles that emerge from the lateral surface of the thalamus. |
Touch DNA | Touch DNA, also known as Trace DNA, is a forensic method for analyzing DNA left at the scene of a crime. It is called "touch DNA" because it only requires very small samples, for example from the skin cells left on an object after it has been touched or casually handled, or from footprints. Touch DNA analysis only requires seven or eight cells from the outermost layer of human skin. The technique has been criticized for high rates of false positives due to contamination—for example, fingerprint brushes used by crime scene investigators can transfer trace amounts of skin cells from one surface to another, leading to inaccurate results. Because of the risk of false positives, it is more often used by the defense to help exclude a suspect rather than the prosecution.The technique is very similar to Low Copy Number DNA analysis, to the extent that court rulings have sometimes confused the two. However, in LCN DNA analysis, the DNA goes through additional cycles of PCR amplification. |
Data corruption | Data corruption refers to errors in computer data that occur during writing, reading, storage, transmission, or processing, which introduce unintended changes to the original data. Computer, transmission, and storage systems use a number of measures to provide end-to-end data integrity, or lack of errors. |
Dess–Martin periodinane | Dess–Martin periodinane (DMP) is a chemical reagent used in the Dess–Martin oxidation, oxidizing primary alcohols to aldehydes and secondary alcohols to ketones. This periodinane has several advantages over chromium- and DMSO-based oxidants that include milder conditions (room temperature, neutral pH), shorter reaction times, higher yields, simplified workups, high chemoselectivity, tolerance of sensitive functional groups, and a long shelf life. However, use on an industrial scale is made difficult by its cost and its potentially explosive nature. It is named after the American chemists Daniel Benjamin Dess and James Cullen Martin who developed the reagent in 1983. It is based on IBX, but due to the acetate groups attached to the central iodine atom, DMP is much more reactive than IBX and is much more soluble in organic solvents. |
Hypalon | Hypalon is a chlorosulfonated polyethylene (CSPE) synthetic rubber (CSM) noted for its resistance to chemicals, temperature extremes, and ultraviolet light. It was a product of DuPont Performance Elastomers, a subsidiary of DuPont. Hypalon as it is now known in the marine industry today is a remarketed version of the old Hypalon using an additional layer of neoprene (cr) so the new chemical formulation is csm/cr. |
Ground rules | Ground rules are rules applying to the field, objects on and near it, and special situations relating to them, in the game of baseball. Major League Baseball has defined a set of "universal ground rules" that apply to all MLB ballparks; individual ballparks have the latitude to set ground rules above and beyond the universal ground rules, as long as they do not directly contradict each other. Additionally, a set of universal ground rules exists for the six MLB stadiums with retractable roofs, with the individual ballparks able to set additional rules. |
Posterior vein of the left ventricle | The posterior vein of the left ventricle runs on the diaphragmatic surface of the left ventricle to the coronary sinus, but may end in the great cardiac vein. |
CXBN-2 | Cosmic X-ray Background Nanosatellite-2 (CXBN-2 or CXBN 2) was a satellite and mission developed by the Morehead State University to follow up on the CXBN mission launched in 2012. It was an improved version of the previous spacecraft and it increased the precision of measurements of the cosmic X-ray background in the 30-50 keV range and helped to improve understanding of the early universe. |
Casting on (knitting) | In knitting, casting on is a family of techniques for adding new stitches that do not depend on earlier stitches, i.e., having an independent lower edge. In principle, it is the opposite of binding off, but the techniques involved are generally unrelated.
The cast-on can also be decorated with various stitch patterns, especially picots. The cast-on stitches can also be twisted clockwise or counterclockwise as they are added to the needle; this is commonly done for the single cast-on described below to give it a neater, more uniform look.
Casting on is sometimes done with doubled-up needles or a needle of larger size than for the main pattern; the extra bit of yarn in each stitch makes the edge less tight and gives it more flexibility. |
Urticarial erythema multiforme | Urticarial erythema multiforme is an unusual reaction virtually always associated with antibiotic ingestions, characterized by skin lesions that consist of urticarial papules and plaques, some of which clear centrally forming annular lesions, but with no true urticarial lesions.: 130 |
Middle meningeal artery | The middle meningeal artery (Latin: arteria meningea media) is typically the third branch of the first portion of the maxillary artery. After branching off the maxillary artery in the infratemporal fossa, it runs through the foramen spinosum to supply the dura mater (the outer meningeal layer) and the calvaria. The middle meningeal artery is the largest of the three (paired) arteries that supply the meninges, the others being the anterior meningeal artery and the posterior meningeal artery. |
Erythronolide synthase | In enzymology, an erythronolide synthase (also 6-Deoxyerythronolide B Synthase or DEBS) is an enzyme that catalyzes the chemical reaction 6 malonyl-CoA + propanoyl-CoA ⇌ 7 CoA + 6-deoxyerythronolide BThus, the two substrates of this enzyme are malonyl-CoA and propanoyl-CoA, whereas its two products are CoA and 6-deoxyerythronolide b. This enzyme participates in biosynthesis of 12-, 14- and 16-membered macrolides. |
Restriction fragment mass polymorphism | Restriction Fragment Mass Polymorphism (RFMP) is a technology which digests DNA into oligonucleotide fragments, and detects variation of DNA sequences by molecular weight of the fragments. RFMP is a proprietary technology of GeneMatrix and can be utilized for genotyping viruses and microorganisms, and for human genome research. It is relatively restricted in usage due to the existence of many other genotyping products. |
Horseshoe theory | In popular discourse, the horseshoe theory asserts that the far-left and the far-right, rather than being at opposite and opposing ends of a linear continuum of the political spectrum, closely resemble each other, analogous to the way that the opposite ends of a horseshoe are close together. The theory is attributed to the French philosopher and writer of fiction and poetry Jean-Pierre Faye in his 2002 book, Le Siècle des idéologies ("The Century of Ideologies").Several political scientists, psychologists, and sociologists have criticized the horseshoe theory. Proponents point to a number of perceived similarities between extremes and allege that both have a tendency to support authoritarianism or totalitarianism; this does not appear to be supported by scholars in the field, and the few peer-reviewed research on the subject is scarce, with existing studies and comprehensive reviews often finding only limited support and only under certain conditions, and that generally contradict the theory's central premises. |
Composing stick | In letterpress printing and typesetting, a composing stick is a tray-like tool used to assemble pieces of metal type into words and lines, which are then transferred to a galley before being locked into a forme and printed. Many composing sticks have one adjustable end, allowing the length of the lines and consequent width of the page or column to be set, with spaces and quadrats of different sizes being used to make up the exact width. Early composing sticks often had a fixed measure, as did many used in setting type for newspapers, which were fixed to the width of a standard column, when newspapers were still composed by hand. |
Tinkerforge | Tinkerforge is an open source hardware platform of stackable microcontroller building blocks (Bricks) that can control different modules (Bricklets). The primary communication interface of the building blocks can be extended using Master Extensions. The hardware can be controlled by external programs written in C, C++, C#, Object Pascal, Java, Perl, PHP, Python, Ruby, Shell and VB.NET over a USB, Wifi or Ethernet connection, and running on Windows, Linux and macOS. This non-embedded programming approach eliminates the typical requirements and limitations (development tools, limited availability of RAM and processing power) of conventional embedded software development (such as Arduino). Tinkerforge hardware and software are both Open Source, and all files are hosted on GitHub. |
Airborne wind shear detection and alert system | The airborne wind shear detection and alert system, fitted in an aircraft, detects and alerts the pilot both visually and aurally of a wind shear condition. A reactive wind shear detection system is activated by the aircraft flying into an area with a wind shear condition of sufficient force to pose a hazard to the aircraft. A predictive wind shear detection system is activated by the presence of a wind shear condition ahead of the aircraft. In 1988, the U.S. Federal Aviation Administration (FAA) mandated that all turbine-powered commercial aircraft must have on-board wind shear detection systems by 1993. Airlines successfully lobbied to have commercial turbo-prop aircraft exempted from this requirement.In the predictive wind shear detection mode, the weather radar processor of the aircraft detects the presence of a microburst, a type of vertical wind shear condition, by detecting the Doppler frequency shift of the microwave pulses caused by the microburst ahead of the aircraft, and displays the area where it is present in the Navigation Display Unit (of the Electronic Flight Instrument System) along with an aural warning. |
SGI Indigo | The Indigo, introduced as the IRIS Indigo, is a line of workstation computers developed and manufactured by Silicon Graphics, Inc. (SGI). SGI first announced the system in July 1991.The Indigo is considered one of the most capable graphics workstations of its era, and was essentially peerless in the realm of hardware-accelerated three-dimensional graphics rendering. For use as a graphics workstation, the Indigo was equipped with a two-dimensional framebuffer or, for use as a 3D graphics workstation, with the Elan graphics subsystem including one to four Geometry Engines (GEs). SGI sold a server version with no video adapter. |
Esaote | Esaote SpA is an Italian company operating in the biomedical sector that deals with the design, production, sale and maintenance of equipment for medical diagnostics. |
(Cyclopentadienyl)titanium trichloride | (Cyclopentadienyl)titanium trichloride is an organotitanium compound with the formula (C5H5)TiCl3. It is a moisture sensitive orange solid. The compound adopts a piano stool geometry. |
Walsh function | In mathematics, more specifically in harmonic analysis, Walsh functions form a complete orthogonal set of functions that can be used to represent any discrete function—just like trigonometric functions can be used to represent any continuous function in Fourier analysis. They can thus be viewed as a discrete, digital counterpart of the continuous, analog system of trigonometric functions on the unit interval. But unlike the sine and cosine functions, which are continuous, Walsh functions are piecewise constant. They take the values −1 and +1 only, on sub-intervals defined by dyadic fractions. |
Obliteration by incorporation | In sociology of science, obliteration by incorporation (OBI) occurs when at some stage in the development of a science, certain ideas become so universally accepted and commonly used that their contributors are no longer cited. Eventually, its source and creator are forgotten ("obliterated") as the concept enters common knowledge (is "incorporated"). Obliteration occurs when "the sources of an idea, finding or concept, become obliterated by incorporation in canonical knowledge, so that only a few are still aware of their parentage". |
Dentinogenesis | Dentinogenesis is the formation of dentin, a substance that forms the majority of teeth. Dentinogenesis is performed by odontoblasts, which are a special type of biological cell on the outer wall of dental pulps, and it begins at the late bell stage of a tooth development. The different stages of dentin formation after differentiation of the cell result in different types of dentin: mantle dentin, primary dentin, secondary dentin, and tertiary dentin. |
Session (cricket) | In cricket, a session is a period of play during which overs are played continuously until a break in play is called. |
Depiction | Depiction is reference conveyed through pictures. A picture refers to its object through a non-linguistic two-dimensional scheme, and is distinct from writing or notation. A depictive two-dimensional scheme is called a picture plane and may be constructed according to descriptive geometry, where they are usually divided between projections (orthogonal and various oblique angles) and perspectives (according to number of vanishing points). |
Hair washing | Hair washing is the cosmetic act of keeping hair clean by washing it. To remove sebum from hair, some apply a surfactant, usually shampoo (sometimes soap) to their hair and lather the surfactant with water. The surfactant is rinsed out with water along with the dirt that it bonds to. |
Mersenne Twister | The Mersenne Twister is a general-purpose pseudorandom number generator (PRNG) developed in 1997 by Makoto Matsumoto (松本 眞) and Takuji Nishimura (西村 拓士). Its name derives from the fact that its period length is chosen to be a Mersenne prime.
The Mersenne Twister was designed specifically to rectify most of the flaws found in older PRNGs.
The most commonly used version of the Mersenne Twister algorithm is based on the Mersenne prime 19937 −1 . The standard implementation of that, MT19937, uses a 32-bit word length. There is another implementation (with five variants) that uses a 64-bit word length, MT19937-64; it generates a different sequence. |
Digital imaging technician | A digital imaging technician (DIT) was created for the motion picture industry in response to the transition from the long established film movie camera medium into the current digital cinema era. The DIT is the camera department crew member who works in collaboration with the cinematographer on workflow, systemization, camera settings, signal integrity and image manipulation to achieve the highest image quality and creative goals of cinematography in the digital realm.With the progression of the digitization ever more tasks concerning data management emerged: the position of the Digital Imaging Technician was introduced. The DIT is the connector between on-set time and post production. DITs support the camera team with technical and creative tasks with the digital camera. Their purpose is to ensure the best technical quality possible, as well as production safety. DITs are responsible for tasks during preparation, on-set time and post production. They are also responsible for managing data on set, such as making backups and quality checks of the material. In post production, the DIT hands the recordings to the post production team, possibly after checking the quality of the material and generating working copies. |
Truba | The Wooden Trumpet (truba (Ukrainian: Труба) Lihava, Cossack Trumpet, Sihnal'na truba).
The truba, or lihava, is an instrument of the surma-horn type, only with a mouthpiece like that of a standard trumpet made of wood. The instrument has seven to ten finger-holes and is used in contemporary folk instrument orchestras. |
Matti Pietikäinen (academic) | Matti Kalevi Pietikäinen is a computer scientist. He is currently Professor (emer.) in the Center for Machine Vision and Signal Analysis, University of Oulu, Finland. His research interests are in texture-based computer vision, face analysis, affective computing, biometrics, and vision-based perceptual interfaces. He was Director of the Center for Machine Vision Research, and Scientific Director of Infotech Oulu. |
9-Methylene-fluorene | 9-Methylene-fluorene or dibenzofulvene (DBF) is a polycyclic aromatic hydrocarbon with chemical formula C14H10. |
Game without a value | In the mathematical theory of games, in particular the study of zero-sum continuous games, not every game has a minimax value. This is the expected value to one of the players when both play a perfect strategy (which is to choose from a particular PDF). |
Geologic temperature record | The geologic temperature record are changes in Earth's environment as determined from geologic evidence on multi-million to billion (109) year time scales. The study of past temperatures provides an important paleoenvironmental insight because it is a component of the climate and oceanography of the time. |
Net metering | Net metering (or net energy metering, NEM) is an electricity billing mechanism that allows consumers who generate some or all of their own electricity to use that electricity anytime, instead of when it is generated. This is particularly important with renewable energy sources like wind and solar, which are non-dispatchable (when not coupled to storage). Monthly net metering allows consumers to use solar power generated during the day at night, or wind from a windy day later in the month. Annual net metering rolls over a net kilowatt-hour (kWh) credit to the following month, allowing solar power that was generated in July to be used in December, or wind power from March in August. |
Follicular hyperplasia | Follicular hyperplasia (FH) is a type of lymphoid hyperplasia and is classified as a lymphadenopathy, which means a disease of the lymph nodes. It is caused by a stimulation of the B cell compartment and by abnormal cell growth of secondary follicles. This typically occurs in the cortex without disrupting the lymph node capsule. The follicles are pathologically polymorphous, are often contrasting and varying in size and shape. Follicular hyperplasia is distinguished from follicular lymphoma in its polyclonality and lack of bcl-2 protein expression, whereas follicular lymphoma is monoclonal, and expresses bcl-2. |
Spent caustic | Spent caustic is a waste industrial caustic solution that has become exhausted and is no longer useful (or spent). Spent caustics are made of sodium hydroxide or potassium hydroxide, water, and contaminants. The contaminants have consumed the majority of the sodium (or potassium) hydroxide and thus the caustic liquor is spent, for example, in one common application H2S (gas) is scrubbed by the NaOH (aqueous) to form NaHS (aq) and H2O (l), thus consuming the caustic. |
Histamine intolerance | Histamine intolerance, sometimes called histaminosis, is an over-accumulation of dietary histamine in the human body. Histamine intolerance is sometimes informally called an allergy; however, the intolerance is technically caused by the gradual accumulation of extracellular histamine due to an imbalance.
Roughly 1% of the population has histamine intolerance; of those, 80% are middle-aged. |
KakaoStyle | KakaoStyle (Hangul: 카카오스타일) is a mobile application that curates fashion content from various places. KakaoTalk users are able to check various fashion trends with app and see what their friends are also interested in. The app can even give suggestions and options to purchase the clothing. |
Service Update Management Assistant | The Service Update Management Assistant (SUMA) automates the update process for the AIX operating system by the retrieval of maintenance updates from IBM.Without extensive configuration it is capable of automatically downloading, when available, entire maintenance levels and the latest security updates. It is also capable of comparisons against currently installed software, fix repositories and maintenance levels.
SUMA is capable of e-mail notification for currently available downloads. |
Triosmium dodecacarbonyl | Triosmium dodecacarbonyl is a chemical compound with the formula Os3(CO)12. This yellow-colored metal carbonyl cluster is an important precursor to organo-osmium compounds. Many of the advances in cluster chemistry have arisen from studies on derivatives of Os3(CO)12 and its lighter analogue Ru3(CO)12. |
E-Sampark | e-Sampark is a mechanism used by the Government of India to contact citizens electronically and is a part of the Digital India campaign. The name is derived from the Hindi word sampark meaning contact.The main features are: sending informational and public service messages via e-mails, SMSs and outbound dialing usage of the customised user lists SMSs can be sent via the smartphone application option to subscribe to the e-Sampark database by individuals, etc. |
Electrical load | An electrical load is an electrical component or portion of a circuit that consumes (active) electric power, such as electrical appliances and lights inside the home. The term may also refer to the power consumed by a circuit. This is opposed to a power source, such as a battery or generator, which produces power.The term is used more broadly in electronics for a device connected to a signal source, whether or not it consumes power. If an electric circuit has an output port, a pair of terminals that produces an electrical signal, the circuit connected to this terminal (or its input impedance) is the load. For example, if a CD player is connected to an amplifier, the CD player is the source, and the amplifier is the load.Load affects the performance of circuits with respect to output voltages or currents, such as in sensors, voltage sources, and amplifiers. Mains power outlets provide an easy example: they supply power at constant voltage, with electrical appliances connected to the power circuit collectively making up the load. When a high-power appliance switches on, it dramatically reduces the load impedance. |
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