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https://en.wikipedia.org/wiki/Commutation%20%28neurophysiology%29 | In neurophysiology, commutation is the process by which the brain's neural circuits exhibit non-commutativity.
Physiologist Douglas B. Tweed and coworkers have considered whether certain neural circuits in the brain exhibit noncommutativity and state:
In noncommutative algebra, order makes a difference to multiplicat... |
https://en.wikipedia.org/wiki/Cryptochirality | In stereochemistry, cryptochirality is a special case of chirality in which a molecule is chiral but its specific rotation is non-measurable. The underlying reason for the lack of rotation is the specific electronic properties of the molecule. The term was introduced by Kurt Mislow in 1977.
For example, the alkane 5-e... |
https://en.wikipedia.org/wiki/Biomedical%20tissue | Biomedical tissue is biological tissue used for organ transplantation and medical research, particularly cancer research. When it is used for research it is a biological specimen.
Such tissues and organs may be referred to as implant tissue, allograft, xenograft, skin graft tissue, human transplant tissue, or implant ... |
https://en.wikipedia.org/wiki/Eliahu%20I.%20Jury | Eliahu Ibrahim Jury (May 23, 1923 – September 20, 2020) was an Iraqi-born American engineer. He received his the E.E. degree from the Technion – Israel Institute of Technology, Haifa, Mandatory Palestine (now, Israel), in 1947, the M.S. degree in electrical engineering from Harvard University, Cambridge, MA, in 1949, a... |
https://en.wikipedia.org/wiki/Shade%20tolerance | In ecology, shade tolerance is a plant's ability to tolerate low light levels. The term is also used in horticulture and landscaping, although in this context its use is sometimes imprecise, especially in labeling of plants for sale in commercial nurseries.
Shade tolerance is a complex, multi-faceted property of plan... |
https://en.wikipedia.org/wiki/Pathwidth | In graph theory, a path decomposition of a graph is, informally, a representation of as a "thickened" path graph, and the pathwidth of is a number that measures how much the path was thickened to form . More formally, a path-decomposition is a sequence of subsets of vertices of such that the endpoints of each edge ... |
https://en.wikipedia.org/wiki/Haven%20%28graph%20theory%29 | In graph theory, a haven is a certain type of function on sets of vertices in an undirected graph. If a haven exists, it can be used by an evader to win a pursuit–evasion game on the graph, by consulting the function at each step of the game to determine a safe set of vertices to move into. Havens were first introduced... |
https://en.wikipedia.org/wiki/Railroad%20ecology | Railroad ecology or railway ecology is a term used to refer to the study of the ecological community growing along railroad or railway tracks and the effects of railroads on natural ecosystems. Such ecosystems have been studied primarily in Europe. Similar conditions and effects appear also by roads used by vehicles. R... |
https://en.wikipedia.org/wiki/Lateral%20corticospinal%20tract | The lateral corticospinal tract (also called the crossed pyramidal tract or lateral cerebrospinal fasciculus) is the largest part of the corticospinal tract. It extends throughout the entire length of the spinal cord, and on transverse section appears as an oval area in front of the posterior column and medial to the p... |
https://en.wikipedia.org/wiki/Anterior%20corticospinal%20tract | The anterior corticospinal tract (also called the ventral corticospinal tract, "Bundle of Turck", medial corticospinal tract, direct pyramidal tract, or anterior cerebrospinal fasciculus) is a small bundle of descending fibers that connect the cerebral cortex to the spinal cord. Descending tracts are pathways by which ... |
https://en.wikipedia.org/wiki/Fej%C3%A9r%27s%20theorem | In mathematics, Fejér's theorem, named after Hungarian mathematician Lipót Fejér, states the following:
Explanation of Fejér's Theorem's
Explicitly, we can write the Fourier series of f as
where the nth partial sum of the Fourier series of f may be written as
where the Fourier coefficients are
Then, we can define
... |
https://en.wikipedia.org/wiki/Network%20Security%20Services | Network Security Services (NSS) is a collection of cryptographic computer libraries designed to support cross-platform development of security-enabled client and server applications with optional support for hardware TLS/SSL acceleration on the server side and hardware smart cards on the client side. NSS provides a com... |
https://en.wikipedia.org/wiki/Discrete%20Poisson%20equation | In mathematics, the discrete Poisson equation is the finite difference analog of the Poisson equation. In it, the discrete Laplace operator takes the place of the Laplace operator. The discrete Poisson equation is frequently used in numerical analysis as a stand-in for the continuous Poisson equation, although it is al... |
https://en.wikipedia.org/wiki/Gray%20short-tailed%20opossum | The gray short-tailed opossum (Monodelphis domestica) is a small South American member of the family Didelphidae. Unlike most other marsupials, the gray short-tailed opossum does not have a true pouch. The scientific name Monodelphis is derived from Greek and means "single womb" (referring to the lack of a pouch) and t... |
https://en.wikipedia.org/wiki/Satisfiability%20modulo%20theories | In computer science and mathematical logic, satisfiability modulo theories (SMT) is the problem of determining whether a mathematical formula is satisfiable. It generalizes the Boolean satisfiability problem (SAT) to more complex formulas involving real numbers, integers, and/or various data structures such as lists, a... |
https://en.wikipedia.org/wiki/Timeline%20of%20immunology | The following are notable events in the Timeline of immunology:
1550 BCE – The Ebers papyrus recommends placing a poultice on a tumor and then making an incision, which would induce infection and cause regression of the tumor.
1549 – The earliest account of inoculation of smallpox (variolation) occurs in Wan Quan's ... |
https://en.wikipedia.org/wiki/Gene%20H.%20Golub | Gene Howard Golub (February 29, 1932 – November 16, 2007), was an American numerical analyst who taught at Stanford University as Fletcher Jones Professor of Computer Science and held a courtesy appointment in electrical engineering.
Personal life
Born in Chicago, he was educated at the University of Illinois at Urban... |
https://en.wikipedia.org/wiki/Admissible%20set | In set theory, a discipline within mathematics, an admissible set is a transitive set such that is a model of Kripke–Platek set theory (Barwise 1975).
The smallest example of an admissible set is the set of hereditarily finite sets. Another example is the set of hereditarily countable sets.
See also
Admissible ord... |
https://en.wikipedia.org/wiki/Turn%20%28biochemistry%29 | A turn is an element of secondary structure in proteins where the polypeptide chain reverses its overall direction.
Definition
According to one definition, a turn is a structural motif where the Cα atoms of two residues separated by a few (usually 1 to 5) peptide bonds are close (less than ). The proximity of the te... |
https://en.wikipedia.org/wiki/Little%20Boy%20from%20Manly | The Little Boy from Manly was a national personification of New South Wales and later Australia created by the cartoonist Livingston Hopkins of The Bulletin in April 1885.
In March 1885, as the New South Wales Contingent was about to depart for the Sudan, a letter was addressed to Premier William Bede Dalley containin... |
https://en.wikipedia.org/wiki/Code%20%28set%20theory%29 | In set theory, a code for a hereditarily countable set
is a set
such that there is an isomorphism between (ω,E) and (X,) where X is the transitive closure of {x}. If X is finite (with cardinality n), then use n×n instead of ω×ω and (n,E) instead of (ω,E).
According to the axiom of extensionality, the identity of a ... |
https://en.wikipedia.org/wiki/Optical%20scalars | In general relativity, optical scalars refer to a set of three scalar functions (expansion), (shear) and (twist/rotation/vorticity) describing the propagation of a geodesic null congruence.
In fact, these three scalars can be defined for both timelike and null geodesic congruences in an identical spirit, but they ... |
https://en.wikipedia.org/wiki/Ducking | In audio engineering, ducking is an audio effect commonly used in radio and pop music, especially dance music. In ducking, the level of one audio signal is reduced by the presence of another signal. In radio this can typically be achieved by lowering (ducking) the volume of a secondary audio track when the primary trac... |
https://en.wikipedia.org/wiki/Nagata%27s%20conjecture%20on%20curves | In mathematics, the Nagata conjecture on curves, named after Masayoshi Nagata, governs the minimal degree required for a plane algebraic curve to pass through a collection of very general points with prescribed multiplicities.
History
Nagata arrived at the conjecture via work on the 14th problem of Hilbert, which asks... |
https://en.wikipedia.org/wiki/D-Link%20G604T%20network%20adaptor | The DSL-G604T is a first D-Link Wireless/ADSL router which firmware is based on open source the MontaVista Linux. The DSL-G604T was introduced in November 2004. This model has been discontinued.
Specifications
Hardware
CPU: Texas Instrument AR7W MIPS 4KEc based SoC with built-in ADSL and Ethernet interfaces
DRAM M... |
https://en.wikipedia.org/wiki/DLL%20injection | In computer programming, DLL injection is a technique used for running code within the address space of another process by forcing it to load a dynamic-link library. DLL injection is often used by external programs to influence the behavior of another program in a way its authors did not anticipate or intend. For examp... |
https://en.wikipedia.org/wiki/S3%20Trio | The S3 Trio range were popular video cards for personal computers and were S3's first fully integrated graphics accelerators. As the name implies, three previously separate components were now included in the same ASIC: the graphics core, RAMDAC and clock generator. The increased integration allowed a graphics card to ... |
https://en.wikipedia.org/wiki/Neville%27s%20algorithm | In mathematics, Neville's algorithm is an algorithm used for polynomial interpolation that was derived by the mathematician Eric Harold Neville in 1934. Given n + 1 points, there is a unique polynomial of degree ≤ n which goes through the given points. Neville's algorithm evaluates this polynomial.
Neville's algorithm... |
https://en.wikipedia.org/wiki/Teaching-family%20model | The Teaching-Family Model (TFM) is a model of care for persons in need of services and care necessary to support an improved quality of life and increase opportunities to live to their potential. The TFM is used internationally in residential homes, foster care, schools, home-based treatment, emergency shelters, assess... |
https://en.wikipedia.org/wiki/Muromonab-CD3 | Muromonab-CD3 (trade name Orthoclone OKT3, marketed by Janssen-Cilag) is an immunosuppressant drug given to reduce acute rejection in patients with organ transplants. It is a monoclonal antibody targeted at the CD3 receptor, a membrane protein on the surface of T cells. It was the first monoclonal antibody to be approv... |
https://en.wikipedia.org/wiki/List%20of%20microprocessors | This is a list of microprocessors.
Altera
Nios 16-bit (soft processor)
Nios II 32-bit (soft processor)
AMD
List of AMD K5 processors
List of AMD Athlon processors
List of AMD Athlon 64 processors
List of AMD Athlon XP processors
List of AMD Duron processors
List of AMD Opteron processors
List of AMD Sempron... |
https://en.wikipedia.org/wiki/Quagga%20Project | The Quagga Project is an attempt by a group in South Africa to use selective breeding to achieve a breeding lineage of Burchell's zebra (Equus quagga burchellii) which visually resemble the extinct quagga (Equus quagga quagga).
History
In 1955, Lutz Heck suggested in his book that careful selective breeding with the... |
https://en.wikipedia.org/wiki/Clobber | Clobber is an abstract strategy game invented in 2001 by combinatorial game theorists Michael H. Albert, J.P. Grossman and Richard Nowakowski. It has subsequently been studied by Elwyn Berlekamp and Erik Demaine among others. Since 2005, it has been one of the events in the Computer Olympiad.
Details
Clobber is best p... |
https://en.wikipedia.org/wiki/Rabi%20problem | The Rabi problem concerns the response of an atom to an applied harmonic electric field, with an applied frequency very close to the atom's natural frequency. It provides a simple and generally solvable example of light–atom interactions and is named after Isidor Isaac Rabi.
Classical Rabi problem
In the classical ... |
https://en.wikipedia.org/wiki/Joule%20effect | Joule effect and Joule's law are any of several different physical effects discovered or characterized by English physicist James Prescott Joule. These physical effects are not the same, but all are frequently or occasionally referred to in the literature as the "Joule effect" or "Joule law" These physical effects incl... |
https://en.wikipedia.org/wiki/Spatial%20visualization%20ability | Spatial visualization ability or visual-spatial ability is the ability to mentally manipulate 2-dimensional and 3-dimensional figures. It is typically measured with simple cognitive tests and is predictive of user performance with some kinds of user interfaces.
Measurement
The cognitive tests used to measure spatial... |
https://en.wikipedia.org/wiki/Expansive%20clay | Expansive clay is a clay soil that is prone to large volume changes (swelling and shrinking) that are directly related to changes in water content. Soils with a high content of expansive minerals can form deep cracks in drier seasons or years; such soils are called vertisols. Soils with smectite clay minerals, includin... |
https://en.wikipedia.org/wiki/Sarcoglycan | The sarcoglycans are a family of transmembrane proteins (α, β, γ, δ or ε) involved in the protein complex responsible for connecting the muscle fibre cytoskeleton to the extracellular matrix, preventing damage to the muscle fibre sarcolemma through shearing forces.
The dystrophin glycoprotein complex (DGC) is a membra... |
https://en.wikipedia.org/wiki/2%2C3-Bisphosphoglyceric%20acid | 2,3-Bisphosphoglyceric acid (conjugate base 2,3-bisphosphoglycerate) (2,3-BPG), also known as 2,3-diphosphoglyceric acid (conjugate base 2,3-diphosphoglycerate) (2,3-DPG), is a three-carbon isomer of the glycolytic intermediate 1,3-bisphosphoglyceric acid (1,3-BPG).
-2,3-BPG is present in human red blood cells (RBC; e... |
https://en.wikipedia.org/wiki/Bacillus%20mycoides | Bacillus mycoides is a bacterium of the genus Bacillus. Like other Bacillus species, B. mycoides is Gram positive, rod-shaped, and forms spores. B. mycoides is distinguished from other Bacillus species by its unusual growth on agar plates, where it forms expansive hairy colonies with characteristic swirls.
Description... |
https://en.wikipedia.org/wiki/Reproductive%20isolation | The mechanisms of reproductive isolation are a collection of evolutionary mechanisms, behaviors and physiological processes critical for speciation. They prevent members of different species from producing offspring, or ensure that any offspring are sterile. These barriers maintain the integrity of a species by reducin... |
https://en.wikipedia.org/wiki/Forma%20specialis | Forma specialis (plural: formae speciales), abbreviated f. sp. (plural ff. spp.) without italics, is an informal taxonomic grouping allowed by the International Code of Nomenclature for algae, fungi, and plants, that is applied to a parasite (most frequently a fungus) which is adapted to a specific host. This classific... |
https://en.wikipedia.org/wiki/Birch%27s%20theorem | In mathematics, Birch's theorem, named for Bryan John Birch, is a statement about the representability of zero by odd degree forms.
Statement of Birch's theorem
Let K be an algebraic number field, k, l and n be natural numbers, r1, ..., rk be odd natural numbers, and f1, ..., fk be homogeneous polynomials with coeffic... |
https://en.wikipedia.org/wiki/International%20Encyclopedia%20of%20Unified%20Science | The International Encyclopedia of Unified Science (IEUS) was a series of publications devoted to unified science. The IEUS was conceived at the Mundaneum Institute in The Hague in the 1930s, and published in the United States beginning in 1938. It was an ambitious project that was never completed.
The IEUS was an outp... |
https://en.wikipedia.org/wiki/Digital%20subchannel | In broadcasting, digital subchannels are a method of transmitting more than one independent program stream simultaneously from the same digital radio or television station on the same radio frequency channel. This is done by using data compression techniques to reduce the size of each individual program stream, and mul... |
https://en.wikipedia.org/wiki/Hedgehog%20signaling%20pathway | The Hedgehog signaling pathway is a signaling pathway that transmits information to embryonic cells required for proper cell differentiation. Different parts of the embryo have different concentrations of hedgehog signaling proteins. The pathway also has roles in the adult. Diseases associated with the malfunction of t... |
https://en.wikipedia.org/wiki/Maxillary%20prominence | Continuous with the dorsal end of the first pharyngeal arch, and growing forward from its cephalic border, is a triangular process, the maxillary prominence (or maxillary process), the ventral extremity of which is separated from the mandibular arch by a ">"-shaped notch.
The maxillary prominence forms the lateral wal... |
https://en.wikipedia.org/wiki/Maxillary%20process%20of%20inferior%20nasal%20concha | From the lower border of the inferior nasal concha, a thin lamina, the maxillary process, curves downward and laterally; it articulates with the maxilla and forms a part of the medial wall of the maxillary sinus. |
https://en.wikipedia.org/wiki/Windows%20Embedded%20CE%206.0 | Windows Embedded CE 6.0 (codenamed "Yamazaki") is the sixth major release of the Microsoft Windows embedded operating system targeted to enterprise-specific tools such as industrial controllers and consumer electronics devices like digital cameras. CE 6.0 features a kernel that supports 32,768 processes, up from the 32... |
https://en.wikipedia.org/wiki/Superior%20lateral%20cutaneous%20nerve%20of%20arm | The superior lateral cutaneous nerve of arm (or superior lateral brachial cutaneous nerve) is the continuation of the posterior branch of the axillary nerve, after it pierces the deep fascia. It contains axons from C5-C6 ventral rami.
Structure
It sweeps around the posterior border of the deltoideus and supplies the s... |
https://en.wikipedia.org/wiki/Posterior%20cutaneous%20nerve%20of%20forearm | The posterior cutaneous nerve of forearm is a nerve found in humans and other animals. It is also known as the dorsal antebrachial cutaneous nerve, the external cutaneous branch of the musculospiral nerve, and the posterior antebrachial cutaneous nerve. It is a cutaneous nerve (a nerve that supplies skin) of the forear... |
https://en.wikipedia.org/wiki/Posterior%20cutaneous%20nerve%20of%20arm | The posterior cutaneous nerve of arm (internal cutaneous branch of musculospiral, posterior brachial cutaneous nerve) is a branch of the radial nerve that provides sensory innervation for much of the skin on the back of the arm. It arises in the axilla.
It is of small size, and passes through the axilla to the medial... |
https://en.wikipedia.org/wiki/Nepeta%20%C3%97%20faassenii | Nepeta × faassenii, a flowering plant also known as catmint and Faassen's catnip, is a primary hybrid of garden origin. The parent species are Nepeta racemosa and Nepeta nepetella.
It is an herbaceous perennial, with oval, opposite, intricately veined, gray—green leaves, on square stems. The foliage is fragrant. It gr... |
https://en.wikipedia.org/wiki/Vascular%20tumor | A vascular tumor is a tumor of vascular origin; a soft tissue growth that can be either benign or malignant, formed from blood vessels or lymph vessels. Examples of vascular tumors include hemangiomas, lymphangiomas, hemangioendotheliomas, Kaposi's sarcomas, angiosarcomas, and hemangioblastomas. An angioma refers to an... |
https://en.wikipedia.org/wiki/Pneumograph | A pneumograph, also known as a pneumatograph or spirograph, is a device for recording velocity and force of chest movements during respiration.
Principle of operation
There are various kinds of pneumographic devices, which have different principles of operation. In one mechanism, a flexible rubber vessel is attached ... |
https://en.wikipedia.org/wiki/Barbarian%20%281987%20video%20game%29 | Barbarian is a 1987 platform game by Psygnosis. It was first developed for the Atari ST, and was ported to the Amiga, Commodore 64, MS-DOS, MSX, Amstrad CPC, and ZX Spectrum. The Amiga port was released in 1987; the others were released in 1988. The cover artwork (part of "Red Dragon" figure/landscape) is by fantasy ar... |
https://en.wikipedia.org/wiki/Physical%20and%20Theoretical%20Chemistry%20Laboratory%20%28Oxford%29 | The Physical and Theoretical Chemistry Laboratory (PTCL) is a major chemistry laboratory at the University of Oxford, England. It is located in the main Science Area of the university on South Parks Road. Previously it was known as the Physical Chemistry Laboratory.
History
The original Physical Chemistry Laboratory w... |
https://en.wikipedia.org/wiki/Splanchnopleuric%20mesenchyme | In the anatomy of an embryo, the splanchnopleuric mesenchyme is a structure created during embryogenesis when the lateral mesodermal germ layer splits into two layers. The inner (or splanchnic) layer adheres to the endoderm, and with it forms the splanchnopleure (mesoderm external to the coelom plus the endoderm).
Se... |
https://en.wikipedia.org/wiki/Somatopleuric%20mesenchyme | In the anatomy of an embryo, the somatopleure is a structure created during embryogenesis when the lateral plate mesoderm splits into two layers. The outer (or somatic) layer becomes applied to the inner surface of the ectoderm, and with it (partially) forms the somatopleure.
The combination of ectoderm and mesoderm... |
https://en.wikipedia.org/wiki/KLV | KLV (Key-Length-Value) is a data encoding standard, often used to embed information in video feeds. The standard uses a type–length–value encoding scheme. Items are encoded into Key-Length-Value triplets, where key identifies the data, length specifies the data's length, and value is the data itself. It is defined in ... |
https://en.wikipedia.org/wiki/Stan%20Frankel | Stanley Phillips Frankel (1919 – May, 1978) was an American computer scientist. He worked in the Manhattan Project and developed various computers as a consultant.
Early life
He was born in Los Angeles, attended graduate school at the University of Rochester, received his PhD in physics from the University of Califor... |
https://en.wikipedia.org/wiki/Kinetic%20inductance | Kinetic inductance is the manifestation of the inertial mass of mobile charge carriers in alternating electric fields as an equivalent series inductance. Kinetic inductance is observed in high carrier mobility conductors (e.g. superconductors) and at very high frequencies.
Explanation
A change in electromotive forc... |
https://en.wikipedia.org/wiki/Spermatic%20plexus | The spermatic plexus (or testicular plexus) is derived from the renal plexus, receiving branches from the aortic plexus. It accompanies the internal spermatic artery to the testis.
Additional images |
https://en.wikipedia.org/wiki/Aorticorenal%20ganglion | The aorticorenal ganglion is composed of the superior mesenteric, renal, and inferior mesenteric ganglia. This is distinct from the celiac ganglia. However, they are part of the preaortic ganglia.
Sympathetic input to the gut comes from the sympathetic chain next to the thoracic vertebrae. The upper nerve supply arr... |
https://en.wikipedia.org/wiki/Inferior%20mesenteric%20ganglion | The inferior mesenteric ganglion is a ganglion located near where the inferior mesenteric artery branches from the abdominal aorta.
Additional images
See also
Superior mesenteric ganglion |
https://en.wikipedia.org/wiki/Superior%20mesenteric%20plexus | The superior mesenteric plexus is a continuation of the lower part of the celiac plexus, receiving a branch from the junction of the right vagus nerve with the plexus.
It surrounds the superior mesenteric artery, accompanies it into the mesentery, and divides into a number of secondary plexuses, which are distributed ... |
https://en.wikipedia.org/wiki/Superior%20mesenteric%20ganglion | The superior mesenteric ganglion is a ganglion in the upper part of the superior mesenteric plexus. It lies close to the origin of the superior mesenteric artery.
Structure
The superior mesenteric ganglion is the synapsing point for one of the pre- and post-synaptic nerves of the sympathetic division of the autonomic... |
https://en.wikipedia.org/wiki/Alkali-metal%20thermal%20to%20electric%20converter | An alkali-metal thermal-to-electric converter (AMTEC, originally called the sodium heat engine or SHE) is a thermally regenerative electrochemical device for the direct conversion of heat to electrical energy. It is characterized by high potential efficiencies and no moving parts except for the working fluid, which mak... |
https://en.wikipedia.org/wiki/Supine%20position | The supine position ( or ) means lying horizontally with the face and torso facing up, as opposed to the prone position, which is face down. When used in surgical procedures, it grants access to the peritoneal, thoracic and pericardial regions; as well as the head, neck and extremities.
Using anatomical terms of locat... |
https://en.wikipedia.org/wiki/Complex%20Hadamard%20matrix | A complex Hadamard matrix is any complex
matrix satisfying two conditions:
unimodularity (the modulus of each entry is unity):
orthogonality: ,
where denotes the Hermitian transpose of and is the identity matrix. The concept is a generalization of the Hadamard matrix. Note that any complex Hadamard matrix c... |
https://en.wikipedia.org/wiki/Claire%20F.%20Gmachl | Claire F. Gmachl is the Eugene Higgins Professor of Electrical Engineering at Princeton University. She is best known for her work in the development of quantum cascade lasers.
Education and honors
Gmachl earned her M.Sc. in physics from the University of Innsbruck in 1991. She went on to receive her Ph.D. in electr... |
https://en.wikipedia.org/wiki/Tacit%20programming | Tacit programming, also called point-free style, is a programming paradigm in which function definitions do not identify the arguments (or "points") on which they operate. Instead the definitions merely compose other functions, among which are combinators that manipulate the arguments. Tacit programming is of theoretic... |
https://en.wikipedia.org/wiki/Reuleaux%20tetrahedron | The Reuleaux tetrahedron is the intersection of four balls of radius s centered at the vertices of a regular tetrahedron with side length s. The spherical surface of the ball centered on each vertex passes through the other three vertices, which also form vertices of the Reuleaux tetrahedron. Thus the center of each ba... |
https://en.wikipedia.org/wiki/Gramme%20machine | A Gramme machine, Gramme ring, Gramme magneto, or Gramme dynamo is an electrical generator that produces direct current, named for its Belgian inventor, Zénobe Gramme, and was built as either a dynamo or a magneto. It was the first generator to produce power on a commercial scale for industry. Inspired by a machine in... |
https://en.wikipedia.org/wiki/Emotion%20in%20animals | Emotion is defined as any mental experience with high intensity and high hedonic content. The existence and nature of emotions in non-human animals are believed to be correlated with those of humans and to have evolved from the same mechanisms. Charles Darwin was one of the first scientists to write about the subject, ... |
https://en.wikipedia.org/wiki/Animal%20loss | The loss of a pet or an animal to which one has become emotionally bonded oftentimes results in grief which can be comparable with the death of a human loved one, or even greater, depending on the individual. The death can be felt more intensely when the owner has made a decision to end the pet's life through euthanasi... |
https://en.wikipedia.org/wiki/Pulse%20transition%20detector | A Pulse transition detector is used in flip flops in order to achieve edge triggering in the circuit. It merely converts the clock signal's rising edge to a very narrow pulse.
The PTD consists of a delay gate (which delays the clock signal) and the clock signal itself passed through a NAND gate and then inverted.
The... |
https://en.wikipedia.org/wiki/Cryptographic%20module | A cryptographic module is a component of a computer system that implements cryptographic algorithms in a secure way, typically with some element of tamper resistance.
NIST defines a cryptographic modules as "The set of hardware, software, and/or firmware that implements security functions (including cryptographic algo... |
https://en.wikipedia.org/wiki/Brahmagupta%27s%20identity | In algebra, Brahmagupta's identity says that, for given , the product of two numbers of the form is itself a number of that form. In other words, the set of such numbers is closed under multiplication. Specifically:
Both (1) and (2) can be verified by expanding each side of the equation. Also, (2) can be obtained fr... |
https://en.wikipedia.org/wiki/Telegrapher%27s%20equations | The telegrapher's equations (or just telegraph equations) are a set of two coupled, linear equations that predict the voltage and current distributions on a linear electrical transmission line. The equations are important because they allow transmission lines to be analyzed using circuit theory. The equations and thei... |
https://en.wikipedia.org/wiki/Distributed%20System%20Security%20Architecture | Distributed System Security Architecture or (DSSA) is a computer security architecture that provides a suite of functions including login, authentication, and access control in a distributed system. To differ from other similar architectures, the DSSA architecture offers the ability to access all these functions withou... |
https://en.wikipedia.org/wiki/Portable%2C%20Extensible%20Toolkit%20for%20Scientific%20Computation | The Portable, Extensible Toolkit for Scientific Computation (PETSc, pronounced PET-see; the S is silent), is a suite of data structures and routines developed by Argonne National Laboratory for the scalable (parallel) solution of scientific applications modeled by partial differential equations. It employs the Message... |
https://en.wikipedia.org/wiki/HRU%20%28security%29 | The HRU security model (Harrison, Ruzzo, Ullman model) is an operating system level computer security model which deals with the integrity of access rights in the system. It is an extension of the Graham-Denning model, based around the idea of a finite set of procedures being available to edit the access rights of a su... |
https://en.wikipedia.org/wiki/TUNIS | TUNIS (Toronto University System) was a Unix-like operating system, developed at the University of Toronto in the early 1980s. TUNIS was a portable operating system compatible with Unix V7, but with a completely redesigned kernel, written in Concurrent Euclid. Programs that ran under Unix V7 could be run under TUNIS wi... |
https://en.wikipedia.org/wiki/Biodiversity%20and%20drugs | Biodiversity plays a vital role in maintaining human and animal health. Numerous plants, animals, and fungi are used in medicine, as well as to produce vital vitamins, painkillers, and other things. Natural products have been recognized and used as medicines by ancient cultures all around the world. Many animals are al... |
https://en.wikipedia.org/wiki/AT%26T%20UNIX%20PC | The AT&T UNIX PC is a Unix desktop computer originally developed by Convergent Technologies (later acquired by Unisys), and marketed by AT&T Information Systems in the mid- to late-1980s. The system was codenamed "Safari 4" and is also known as the PC 7300, and often dubbed the "3B1". Despite the latter name, the syste... |
https://en.wikipedia.org/wiki/Screen%20protector | A screen protector is an additional sheet of material—commonly polyurethane or laminated glass—that can be attached to the screen of an electronic device and protect it against physical damage.
History
The first screen protector was designed and patented by Herbert Schlegel in 1968 for use on television screens.
Scr... |
https://en.wikipedia.org/wiki/Frzb | Frzb (pronounced like the toy frisbee) is a Wnt-binding protein especially important in embryonic development. It is a competitor for the cell-surface G-protein receptor Frizzled.
Frizzled is a tissue polarity gene in Drosophila melanogaster and encodes integral proteins that function as cell-surface receptors for Wnt... |
https://en.wikipedia.org/wiki/Urofacial%20syndrome | Urofacial syndrome, or Ochoa syndrome, is an autosomal recessive congenital disorder characterized by an association of a lower urinary tract and bowel dysfunction with a typical facial expression: When attempting to smile, the patient seems to be crying or grimacing. It was first described by the Colombian physician B... |
https://en.wikipedia.org/wiki/Dynamic%20network%20analysis | Dynamic network analysis (DNA) is an emergent scientific field that brings together traditional social network analysis (SNA), link analysis (LA), social simulation and multi-agent systems (MAS) within network science and network theory. Dynamic networks are a function of time (modeled as a subset of the real numbers) ... |
https://en.wikipedia.org/wiki/Receptaculites | Receptaculites is the name-bearing genus for an extinct group of conspicuous benthic marine genera, the receptaculitids (formally Receptaculitaceae or Receptaculitidae), that lived from the Early Ordovician through the Permian period, peaking in the Middle Ordovician. The group's phylogenetic origin has long been obscu... |
https://en.wikipedia.org/wiki/Waste%20heat | Waste heat is heat that is produced by a machine, or other process that uses energy, as a byproduct of doing work. All such processes give off some waste heat as a fundamental result of the laws of thermodynamics. Waste heat has lower utility (or in thermodynamics lexicon a lower exergy or higher entropy) than the orig... |
https://en.wikipedia.org/wiki/Math%20circle | A math circle is a learning space where participants engage in the depths and intricacies of mathematical thinking, propagate the culture of doing mathematics, and create knowledge. To reach these goals, participants partake in problem-solving, mathematical modeling, the practice of art, and philosophical discourse. So... |
https://en.wikipedia.org/wiki/Error%20exponent | In information theory, the error exponent of a channel code or source code over the block length of the code is the rate at which the error probability decays exponentially with the block length of the code. Formally, it is defined as the limiting ratio of the negative logarithm of the error probability to the block le... |
https://en.wikipedia.org/wiki/Sidearm%20%28baseball%29 | In baseball, sidearm is a motion for throwing a ball along a low, approximately horizontal plane rather than a high, mostly vertical plane (overhand).
Sidearm is a common way of throwing the ball in the infield, because many throws must be made hurriedly from the glove after fielding ground balls. An infielder's quic... |
https://en.wikipedia.org/wiki/Bifurcation%20locus | In complex dynamics, the bifurcation locus of a parameterized family of one-variable holomorphic functions informally is a locus of those parameterized points for which the dynamical behavior changes drastically under a small perturbation of the parameter. Thus the bifurcation locus can be thought of as an analog of th... |
https://en.wikipedia.org/wiki/Scratchpad%20memory | Scratchpad memory (SPM), also known as scratchpad, scratchpad RAM or local store in computer terminology, is an internal memory, usually high-speed, used for temporary storage of calculations, data, and other work in progress. In reference to a microprocessor (or CPU), scratchpad refers to a special high-speed memory u... |
https://en.wikipedia.org/wiki/Pattern%20hair%20loss | Pattern hair loss (also known as androgenetic alopecia (AGA)) is a hair loss condition that primarily affects the top and front of the scalp. In male-pattern hair loss (MPHL), the hair loss typically presents itself as either a receding front hairline, loss of hair on the crown (vertex) of the scalp, or a combination o... |
https://en.wikipedia.org/wiki/Preconditioner | In mathematics, preconditioning is the application of a transformation, called the preconditioner, that conditions a given problem into a form that is more suitable for numerical solving methods. Preconditioning is typically related to reducing a condition number of the problem. The preconditioned problem is then usua... |
https://en.wikipedia.org/wiki/Cephalium | Cephalium is a frequently brightly coloured structure of wool and bristle at the growing tip of certain cacti. It is most commonly found on cacti of the genus Melocactus and can take a number of colours, forms and shapes.
The cephalium will only begin growing after a cactus has reached a certain size or age. Once flowe... |
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