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https://en.wikipedia.org/wiki/Paul%20Yeboah | Paul Yeboah (1970 – 2021) was an educator, farmer, permaculturist, community developer, and social entrepreneur. Yeboah founded and coordinated the Ghana Permaculture Institute and Network in Techiman, Ghana, West Africa. It is located in the Brong-Ahafo Region of Ghana. The purpose of the Institute is to build and ma... |
https://en.wikipedia.org/wiki/Developmental%20signaling%20center | A developmental signaling center is defined as a group of cells that release various morphogens which can determine the fates, or destined cell types, of adjacent cells. This process in turn determines what tissues the adjacent cells will form. Throughout the years, various development signaling centers have been disco... |
https://en.wikipedia.org/wiki/Hedlundia%20hybrida | Hedlundia hybrida, the oakleaf mountain ash, Swedish service-tree or Finnish whitebeam, is a species of whitebeam native to Norway, eastern Sweden, south-western Finland, and locally in Latvia.
Description
Hedlundia hybrida is a medium-sized deciduous tree growing to 10–15 m tall with a stout trunk up to 60 cm in dia... |
https://en.wikipedia.org/wiki/Weapon%20target%20assignment%20problem | The weapon target assignment problem (WTA) is a class of combinatorial optimization problems present in the fields of optimization and operations research. It consists of finding an optimal assignment of a set of weapons of various types to a set of targets in order to maximize the total expected damage done to the op... |
https://en.wikipedia.org/wiki/Alspach%27s%20conjecture | Alspach's conjecture is a mathematical theorem that characterizes the disjoint cycle covers of complete graphs with prescribed cycle lengths. It is named after Brian Alspach, who posed it as a research problem in 1981. A proof was published by .
Formulation
In this context, a disjoint cycle cover is a set of simple cy... |
https://en.wikipedia.org/wiki/Differential%20GPS | Differential Global Positioning Systems (DGPSs) supplement and enhance the positional data available from global navigation satellite systems (GNSSs). A DGPS for GPS can increase accuracy by about a thousandfold, from approximately to .
DGPSs consist of networks of fixed position, ground-based reference stations. Eac... |
https://en.wikipedia.org/wiki/List%20of%20model%20car%20brands | This page lists model car brand names past and present. The list is inclusive with slush mold, tinplate, pressed steel, diecast zamac, white metal, plastic and resin models and toys from all over the world. A few are even made of crystal, glass, wood, coal or other materials. Some of the brands here are more toy-like a... |
https://en.wikipedia.org/wiki/Reverb%20effect | A reverb effect, or reverb, is an audio effect applied to a sound signal to simulate reverberation. It may be created through physical means, such as echo chambers, or electronically through audio signal processing.
The American producer Bill Putnam is credited for the first artistic use of artificial reverb in music,... |
https://en.wikipedia.org/wiki/Comparison%20matrix | In linear algebra, let be a complex matrix. The comparison matrix of complex matrix A is defined as
See also
Hurwitz matrix
P-matrix
Perron–Frobenius theorem
Z-matrix
L-matrix
M-matrix
H-matrix (iterative method) |
https://en.wikipedia.org/wiki/Percutaneous%20epididymal%20sperm%20aspiration | Percutaneous epididymal sperm aspiration (PESA) is a technique used to determine sperm counts in the event of a possible blockage of the vas deferens. It is an alternative to microepidydimal sperm aspiration (MESA), and aims to address the technical difficulty and cost of MESA. A small needle is inserted through the sk... |
https://en.wikipedia.org/wiki/Progressive%20function | In mathematics, a progressive function ƒ ∈ L2(R) is a function whose Fourier transform is supported by positive frequencies only:
It is called super regressive if and only if the time reversed function f(−t) is progressive, or equivalently, if
The complex conjugate of a progressive function is regressive, and vice ve... |
https://en.wikipedia.org/wiki/Median%20filter | The median filter is a non-linear digital filtering technique, often used to remove noise from an image or signal. Such noise reduction is a typical pre-processing step to improve the results of later processing (for example, edge detection on an image). Median filtering is very widely used in digital image processing ... |
https://en.wikipedia.org/wiki/Pipeline%20%28Unix%29 | In Unix-like computer operating systems, a pipeline is a mechanism for inter-process communication using message passing. A pipeline is a set of processes chained together by their standard streams, so that the output text of each process (stdout) is passed directly as input (stdin) to the next one. The second process ... |
https://en.wikipedia.org/wiki/Vampirella | Vampirella () is a fictional vampire superheroine created by Forrest J Ackerman and comic book artist Trina Robbins in Warren Publishing's black-and-white horror comics magazine Vampirella #1 (Sept. 1969), a sister publication of Creepy and Eerie.
Writer-editor Archie Goodwin later developed the character from horror-... |
https://en.wikipedia.org/wiki/NetTop | NetTop is an NSA project to run Multiple Single-Level systems with a Security-Enhanced Linux host running VMware with Windows as a guest operating system.
NetTop has .
External links
NSA web page on NetTop
VMware PR page on NetTop
HP NetTop web page
TCS Trusted Workstation based on NetTop
Linux security software
Nat... |
https://en.wikipedia.org/wiki/Nancy%20Blachman | Nancy Blachman (born 1956 in Palo Alto, CA) is an American educator, supporter of recreational mathematics and mathematical outreach, software book author, and supporter of indie documentary films. In 2007, she founded the Julia Robinson Mathematics Festival (JRMF), which has grown into a successful math enrichment ent... |
https://en.wikipedia.org/wiki/Tepidisphaera | Tepidisphaera is a genus of bacteria from the family of Planctomycetaceae with one known species (Tepidisphaera mucosa). Tepidisphaera mucosa has been isolated from a hot spring from the Lake Baikal in Kamchatka in Russia. |
https://en.wikipedia.org/wiki/Fast%20Green%20FCF | Fast Green FCF, also called Food green 3, FD&C Green No. 3, Green 1724, Solid Green FCF, and C.I. 42053, is a turquoise triarylmethane food dye. Its E number is E143.
Fast Green FCF is recommended as a replacement of Light Green SF yellowish in Masson's trichrome, as its color is more brilliant and less likely to fade... |
https://en.wikipedia.org/wiki/Hill%20climbing | In numerical analysis, hill climbing is a mathematical optimization technique which belongs to the family of local search. It is an iterative algorithm that starts with an arbitrary solution to a problem, then attempts to find a better solution by making an incremental change to the solution. If the change produces a b... |
https://en.wikipedia.org/wiki/Paul%20Milgrom | Paul Robert Milgrom (born April 20, 1948) is an American economist. He is the Shirley and Leonard Ely Professor of Humanities and Sciences at the Stanford University School of Humanities and Sciences, a position he has held since 1987. He is a professor in the Stanford School of Engineering as well and a Senior Fellow ... |
https://en.wikipedia.org/wiki/Builder%27s%20Old%20Measurement | Builder's Old Measurement (BOM, bm, OM, and o.m.) is the method used in England from approximately 1650 to 1849 for calculating the cargo capacity of a ship. It is a volumetric measurement of cubic capacity. It estimated the tonnage of a ship based on length and maximum beam. It is expressed in "tons burden" (, ), and... |
https://en.wikipedia.org/wiki/Hidden%20node%20problem | In wireless networking, the hidden node problem or hidden terminal problem occurs when a node can communicate with a wireless access point (AP), but cannot directly communicate with other nodes that are communicating with that AP. This leads to difficulties in medium access control sublayer since multiple nodes can sen... |
https://en.wikipedia.org/wiki/Community%20greens | Community Greens, sometimes referred to as backyard commons, urban commons, or pocket neighborhoods, are shared open green spaces on the inside of city blocks, created either when residents merge backyard space or reclaim underutilized urban land such as vacant lots and alleyways. These shared spaces are communally use... |
https://en.wikipedia.org/wiki/Q15X25 | Q15X25 is a communications protocol for sending data over a radio link. It was designed by amateur radio operator Pawel Jalocha, SP9VRC, to be an open communications standard. Like all amateur radio communications modes, this protocol uses open transmissions which can be received and decoded by anyone with similar equi... |
https://en.wikipedia.org/wiki/San%20Luis%20National%20Wildlife%20Refuge%20Complex | The San Luis National Wildlife Refuge Complex is located in the northern San Joaquin Valley, within Merced County and Stanislaus County of California. The complex, with four federal National Wildlife Refuges, is managed by the U.S Fish & Wildlife Service.
Introduction
The complex is composed of the San Luis National ... |
https://en.wikipedia.org/wiki/Game%20accessibility | Within the field of human–computer interaction, accessibility of video games is considered a sub-field of computer accessibility, which studies how software and computers can be made accessible to users with various types of impairments. It can also include tabletop RPGs, board games, and related products.
In spring ... |
https://en.wikipedia.org/wiki/Balanitis | Balanitis is inflammation of the glans penis. When the foreskin is also affected, the proper term is balanoposthitis. Balanitis on boys still in diapers must be distinguished from redness caused by ammoniacal dermatitis. The word balanitis is from the Greek βάλανος , literally meaning 'acorn', used because of the simil... |
https://en.wikipedia.org/wiki/The%20Gap%20%28book%29 | The Gap is a 2013 nonfiction book by Thomas Suddendorf that discusses what cognitive qualities separate humans from other animals, and how they evolved.
The Gap: The Science of What Separates Us From Other Animals. Basic Books: New York
Reviews
Anil Ananthaswamy (27 January 2014). What separates us from other anima... |
https://en.wikipedia.org/wiki/Primitive%20ideal | In mathematics, specifically ring theory, a left primitive ideal is the annihilator of a (nonzero) simple left module. A right primitive ideal is defined similarly. Left and right primitive ideals are always two-sided ideals.
Primitive ideals are prime. The quotient of a ring by a left primitive ideal is a left primit... |
https://en.wikipedia.org/wiki/Harvard%20Mark%20I | The Harvard Mark I, or IBM Automatic Sequence Controlled Calculator (ASCC), was one of the earliest general-purpose electromechanical computers used in the war effort during the last part of World War II.
One of the first programs to run on the Mark I was initiated on 29 March 1944 by John von Neumann. At that time, v... |
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/Lymphovascular%20invasion | Lymphovascular invasion (LVI or lymphovascular space invasion) is the invasion of a cancer to the blood vessels and/or lymphatics.
Terminology
Lymph: A clear or white fluid that travels through vessels, moves within tissues and work to keep all the parts of the body clean.
Vascular: The body's network of blood vessels... |
https://en.wikipedia.org/wiki/Brahmagupta%27s%20problem | This problem was given in India by the mathematician Brahmagupta in 628 AD in his treatise Brahma Sputa Siddhanta:
Solve the Pell's equation
for integers .
Brahmagupta gave the smallest solution as
.
See also
Brahmagupta
Indian mathematics
List of Indian mathematicians
Pell's equation
Indeterminate equation
Dioph... |
https://en.wikipedia.org/wiki/Center%20channel | Center channel refers to an audio channel common to many surround sound formats. It is the channel that is mostly, or fully, dedicated to the reproduction of the dialogue of an audiovisual program. The speaker(s) connected to the center channel are placed in the center of and behind the perforated projection screen, to... |
https://en.wikipedia.org/wiki/Modulin | Modulin may refer to:
Modulen, The brand of dietary supplement by Nestlé designed for persons with Crohn's disease
Phenol-soluble modulin, a family of protein toxins
Toll-like receptor and TLR 2, proteins of which some were previously classified as "modulins"
A musical instrument that is a monophonic analogue homeb... |
https://en.wikipedia.org/wiki/Major%20urinary%20proteins | Major urinary proteins (Mups), also known as α2u-globulins, are a subfamily of proteins found in abundance in the urine and other secretions of many animals. Mups provide a small range of identifying information about the donor animal, when detected by the vomeronasal organ of the receiving animal. They belong to a lar... |
https://en.wikipedia.org/wiki/Talimogene%20laherparepvec | Talimogene laherparepvec, sold under the brand name Imlygic, is a biopharmaceutical medication used to treat melanoma that cannot be operated on; it is injected directly into a subset of lesions which generates a systemic immune response against the recipient's cancer. The final four year analysis from the pivotal pha... |
https://en.wikipedia.org/wiki/Enzyme%20replacement%20therapy | Enzyme replacement therapy (ERT) is a medical treatment which replaces an enzyme that is deficient or absent in the body. Usually, this is done by giving the patient an intravenous (IV) infusion of a solution containing the enzyme.
ERT is available for some lysosomal storage diseases: Gaucher disease, Fabry disease, M... |
https://en.wikipedia.org/wiki/Cyclotron | A cyclotron is a type of particle accelerator invented by Ernest Lawrence in 1929–1930 at the University of California, Berkeley, and patented in 1932. A cyclotron accelerates charged particles outwards from the center of a flat cylindrical vacuum chamber along a spiral path. The particles are held to a spiral trajecto... |
https://en.wikipedia.org/wiki/Product%20category | In the mathematical field of category theory, the product of two categories C and D, denoted and called a product category, is an extension of the concept of the Cartesian product of two sets. Product categories are used to define bifunctors and multifunctors.
Definition
The product category has:
as objects:
pairs o... |
https://en.wikipedia.org/wiki/Just%20enough%20operating%20system | Just enough operating system (JeOS, pronounced "juice" according to SUSE) is a paradigm for customizing operating systems to fit the needs of a particular application such as for a software appliance. The platform only includes the operating system components required to support a particular application and any other t... |
https://en.wikipedia.org/wiki/List%20of%20router%20firmware%20projects | List of software created and maintained by people other than the manufacturer of the product. The extent of support for (and testing on) particular hardware varies from project to project.
Embedded
Notable custom-firmware projects for wireless routers.
Many of these will run on various brands such as Linksys, Asus, Ne... |
https://en.wikipedia.org/wiki/Carlo%20Ghezzi | Carlo Ghezzi is an emeritus professor and former chair of software engineering at the Politecnico di Milano, Italy, and an adjunct professor at the Università della Svizzera italiana (USI), Switzerland. At the Politecnico, he has been the Rector's Delegate for research, department chair, head of the PhD program, and me... |
https://en.wikipedia.org/wiki/Least%20squares | The method of least squares is a standard approach in regression analysis to approximate the solution of overdetermined systems (sets of equations in which there are more equations than unknowns) by minimizing the sum of the squares of the residuals (a residual being the difference between an observed value and the fit... |
https://en.wikipedia.org/wiki/Rubus%20tricolor | Rubus tricolor () is an evergreen prostrate shrub, native to southwestern China. Leaves are dark green above, pale green below, and stems have red bristles. It has white flowers in summer and edible red fruit. It grows approximately high and usually forming a vigorously spreading, dense mat. In cultivation, it is main... |
https://en.wikipedia.org/wiki/Allen%20Telescope%20Array | The Allen Telescope Array (ATA), formerly known as the One Hectare Telescope (1hT), is a radio telescope array dedicated to astronomical observations and a simultaneous search for extraterrestrial intelligence (SETI). The array is situated at the Hat Creek Radio Observatory in Shasta County, northeast of San Francisco... |
https://en.wikipedia.org/wiki/Weighted%20matroid | In combinatorics, a branch of mathematics, a weighted matroid is a matroid endowed with function with respect to which one can perform a greedy algorithm.
A weight function for a matroid assigns a strictly positive weight to each element of . We extend the function to subsets of by summation; is the sum of over ... |
https://en.wikipedia.org/wiki/Relativistic%20speed | Relativistic speed refers to speed at which relativistic effects become significant to the desired accuracy of measurement of the phenomenon being observed. Relativistic effects are those discrepancies between values calculated by models considering and not considering relativity. Related words are velocity, rapidity, ... |
https://en.wikipedia.org/wiki/Stable%20model%20category | In category theory, a branch of mathematics, a stable model category is a pointed model category in which the suspension functor is an equivalence of the homotopy category with itself.
The prototypical examples are the category of spectra in the stable homotopy theory and the category of chain complex of R-modules. On... |
https://en.wikipedia.org/wiki/Pelolinea | Pelolinea is a bacteria genus from the family of Anaerolineaceae with one known species (Pelolinea submarina). Pelolinea submarina has been isolated from marine sediments from the Shimokita Peninsula. |
https://en.wikipedia.org/wiki/JIS%20encoding | In computing, JIS encoding refers to several Japanese Industrial Standards for encoding the Japanese language. Strictly speaking, the term means either:
A set of standard coded character sets for Japanese, notably:
JIS X 0201, the Japanese version of ISO 646 (ASCII) containing the base 7-bit ASCII characters (with s... |
https://en.wikipedia.org/wiki/Quantum%20Experiments%20using%20Satellite%20Technology | Quantum Experiment using Satellite Technology launched in 2017 by Raman Research Institute in February 2021 demonstrated Quantum communication for 50 m apart and on 19 March 2021 for 300 m apart inline of sight in Space Applications Centre in coordination with Indian Space Research Organisation ,Indian Institute of Sc... |
https://en.wikipedia.org/wiki/P-adic%20modular%20form | In mathematics, a p-adic modular form is a p-adic analog of a modular form, with coefficients that are p-adic numbers rather than complex numbers. introduced p-adic modular forms as limits of ordinary modular forms, and shortly afterwards gave a geometric and more general definition. Katz's p-adic modular forms inclu... |
https://en.wikipedia.org/wiki/Ni%20Wei-tou | Ni Wei-tou (; born 1944 in Zhenhai, Ningbo, Zhejiang) is a Taiwanese physicist, who graduated from the Department of Physics of National Taiwan University (NTU), and got his PhD of Physics & Mathematics from California Institute of Technology. After his retirement on 1 October 2000, he is now appointed as a professor e... |
https://en.wikipedia.org/wiki/Intransitive%20dice | A set of dice is intransitive (or nontransitive) if it contains three dice, A, B, and C, with the property that A rolls higher than B more than half the time, and B rolls higher than C more than half the time, but it is not true that A rolls higher than C more than half the time. In other words, a set of dice is intran... |
https://en.wikipedia.org/wiki/Proofs%20of%20Fermat%27s%20little%20theorem | This article collects together a variety of proofs of Fermat's little theorem, which states that
for every prime number p and every integer a (see modular arithmetic).
Simplifications
Some of the proofs of Fermat's little theorem given below depend on two simplifications.
The first is that we may assume that is in ... |
https://en.wikipedia.org/wiki/List%20of%20incomplete%20proofs | This page lists notable examples of incomplete published mathematical proofs. Most of these were accepted as correct for several years but later discovered to contain gaps. There are both examples where a complete proof was later found and where the alleged result turned out to be false.
Results later proved rigorous... |
https://en.wikipedia.org/wiki/Television%20channel%20frequencies | The following tables show the frequencies assigned to broadcast television channels in various regions of the world, along with the ITU letter designator for the system used. The frequencies shown are for the analogue video and audio carriers. The channel itself occupies several megahertz of bandwidth. For example, N... |
https://en.wikipedia.org/wiki/Rybicki%20Press%20algorithm | The Rybicki–Press algorithm is a fast algorithm for inverting a matrix whose entries are given by , where and where the are sorted in order. The key observation behind the Rybicki-Press observation is that the matrix inverse of such a matrix is always a tridiagonal matrix (a matrix with nonzero entries only on the ma... |
https://en.wikipedia.org/wiki/Eremosphaera | Eremosphaera is a genus of green algae in the family Oocystaceae. |
https://en.wikipedia.org/wiki/Metabiaugmented%20hexagonal%20prism | In geometry, the metabiaugmented hexagonal prism is one of the Johnson solids (). As the name suggests, it can be constructed by doubly augmenting a hexagonal prism by attaching square pyramids () to two of its nonadjacent, nonparallel equatorial faces. Attaching the pyramids to opposite equatorial faces yields a parab... |
https://en.wikipedia.org/wiki/Vaginal%20flora%20in%20pregnancy | The vaginal flora in pregnancy, or vaginal microbiota in pregnancy, is different from the vaginal flora (the population of microorganisms that resides in the vagina) before sexual maturity, during reproductive years, and after menopause. A description of the vaginal flora of pregnant women who are immunocompromised is ... |
https://en.wikipedia.org/wiki/Clinical%20metagenomic%20sequencing | Clinical metagenomic next-generation sequencing (mNGS) is the comprehensive analysis of microbial and host genetic material (DNA or RNA) in clinical samples from patients by next-generation sequencing. It uses the techniques of metagenomics to identify and characterize the genome of bacteria, fungi, parasites, and viru... |
https://en.wikipedia.org/wiki/Pharyngobasilar%20fascia | The pharyngobasilar fascia is a fascia of the pharynx. It is situated between the mucous and muscular layers of the pharynx. It is formed as a thickening of the pharyngeal mucosa superior to the superior pharyngeal constrictor muscle. It attaches to the basilar part of occipital bone, the petrous part of the temporal b... |
https://en.wikipedia.org/wiki/Structured%20cabling | In telecommunications, structured cabling is building or campus cabling infrastructure that consists of a number of standardized smaller elements (hence structured) called subsystems. Structured cabling components include twisted pair and optical cabling, patch panels and patch cables.
Overview
Structured cabling is ... |
https://en.wikipedia.org/wiki/TRIAC | A TRIAC (triode for alternating current; also bidirectional triode thyristor or bilateral triode thyristor) is a three-terminal electronic component that conducts current in either direction when triggered. The term TRIAC is a genericised trademark.
TRIACs are a subset of thyristors (analogous to a relay in that a sma... |
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/Persin | Persin is a fungicidal toxin present in the avocado. Persin is an oil-soluble compound structurally similar to a fatty acid, and it leaches into the body of the fruit from the seeds.
The relatively low concentrations of persin in the ripe pulp of the avocado fruit is generally considered harmless to humans. Negative ... |
https://en.wikipedia.org/wiki/Chebyshev%20distance | In mathematics, Chebyshev distance (or Tchebychev distance), maximum metric, or L∞ metric is a metric defined on a vector space where the distance between two vectors is the greatest of their differences along any coordinate dimension. It is named after Pafnuty Chebyshev.
It is also known as chessboard distance, since... |
https://en.wikipedia.org/wiki/Saw%20palmetto%20extract | Saw palmetto extract is an extract of the fruit of the saw palmetto. It is marketed as a dietary supplement that may help with benign prostatic hyperplasia, but there is no clinical evidence that it is effective for this purpose.
Uses and research
Saw palmetto extract is commonly sold as a dietary supplement intende... |
https://en.wikipedia.org/wiki/Faraday%20constant | In physical chemistry, the Faraday constant (symbol , sometimes stylized as ℱ) is a physical constant defined as the quotient of the total electric charge (q) by the amount (n) of elementary charge carriers in any given sample of matter: Fq/n; it is expressed in units of coulombs per mole (C/mol).
As such, it represen... |
https://en.wikipedia.org/wiki/Spectrum%20of%20a%20theory | In model theory, a branch of mathematical logic, the spectrum of a theory
is given by the number of isomorphism classes of models in various cardinalities. More precisely,
for any complete theory T in a language we write I(T, κ) for the number of models of T (up to isomorphism) of cardinality κ. The spectrum problem ... |
https://en.wikipedia.org/wiki/Integer%20circuit | In computational complexity theory, an integer circuit is a circuit model of computation in which inputs to the circuit are sets of integers and each gate of the circuit computes either a set operation or an arithmetic operation on its input sets.
As an algorithmic problem, the possible questions are to find if a give... |
https://en.wikipedia.org/wiki/Prevotella%20intermedia | Prevotella intermedia (formerly Bacteroides intermedius) is a gram-negative, obligate anaerobic pathogenic bacterium involved in periodontal infections, including gingivitis and periodontitis, and often found in acute necrotizing ulcerative gingivitis. It is commonly isolated from dental abscesses, where obligate anaer... |
https://en.wikipedia.org/wiki/Version%206%20Unix | Sixth Edition Unix, also called Version 6 Unix or just V6, was the first version of the Unix operating system to see wide release outside Bell Labs. It was released in May 1975 and, like its direct predecessor, targeted the DEC PDP-11 family of minicomputers. It was superseded by Version 7 Unix in 1978/1979, although V... |
https://en.wikipedia.org/wiki/Chaim%20Goodman-Strauss | Chaim Goodman-Strauss (born June 22, 1967 in Austin, Texas) is an American mathematician who works in convex geometry, especially aperiodic tiling. He is on the faculty of the University of Arkansas and currently serves as outreach mathematician for the National Museum of Mathematics. He is co-author with John H. Conwa... |
https://en.wikipedia.org/wiki/Mathematical%20Methods%20of%20Classical%20Mechanics | Mathematical Methods of Classical Mechanics is a textbook by mathematician Vladimir I. Arnold. It was originally written in Russian, and later translated into English by A. Weinstein and K. Vogtmann. It is aimed at graduate students.
Russian original and translations
The original Russian first edition Математические м... |
https://en.wikipedia.org/wiki/SafeNet | SafeNet, Inc. was an information security company based in Belcamp, Maryland, United States, which was acquired in August 2014 by the French security company Gemalto. Gemalto was, in turn, acquired by Thales Group in 2019. The former SafeNet's products include solutions for enterprise authentication, data encryption,... |
https://en.wikipedia.org/wiki/Machine | A machine is a physical system using power to apply forces and control movement to perform an action. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological macromolecules, such as molecular machines. Machines can be driven by animals and people, by... |
https://en.wikipedia.org/wiki/Size%E2%80%93weight%20illusion | The size–weight illusion, also known as the Charpentier illusion, is named after the French physician Augustin Charpentier because he was the first to demonstrate the illusion experimentally.
It is also called De Moor's illusion, named after Belgian physician Jean Demoor (1867–1941).
Description
The illusion occurs w... |
https://en.wikipedia.org/wiki/Coefficient%20of%20variation | In probability theory and statistics, the coefficient of variation (CV), also known as Normalized Root-Mean-Square Deviation (NRMSD), Percent RMS, and relative standard deviation (RSD), is a standardized measure of dispersion of a probability distribution or frequency distribution. It is defined as the ratio of the sta... |
https://en.wikipedia.org/wiki/Simulation%20for%20Automatic%20Machinery | Simulation for Automatic Machinery or SAM were two unique minicomputers built by the Norwegian Defence Research Establishment (NDRE) in the mid-1960s. SAM 1, built between 1962 and 1964, was the first Norwegian-built programmable computer. It featured 4,096 14-bit words of memory and 14 registers and was used in-house ... |
https://en.wikipedia.org/wiki/BASIC%20Atom | Basic Atom refers to a line of self-contained microcontrollers from Basic Micro.
Like the Basic stamp, the Basic Atom line is based upon various microchips pre-programmed with an interpreter, making it easy to change "programs", as they are only "data" being interpreted. A compiler converts a high level language into ... |
https://en.wikipedia.org/wiki/Heme%20O | Heme O (or haem O) differs from the closely related heme A by having a methyl group at ring position 8 instead of the formyl group. The isoprenoid chain at position 2 is the same.
Heme O, found in the bacterium Escherichia coli, functions in a similar manner to heme A in mammalian oxygen reduction.
See also
Heme |
https://en.wikipedia.org/wiki/Indexation%20of%20contracts | In statistics relating to national economies, the indexation of contracts also called "index linking" and "contract escalation" is a procedure when a contract includes a periodic adjustment to the prices paid for the contract provisions based on the level of a nominated price index. The purpose of indexation is to read... |
https://en.wikipedia.org/wiki/Haematopoietic%20system | The haematopoietic system is the system in the body involved in the creation of the cells of blood.
Structure
Stem cells
Haematopoietic stem cells (HSCs) reside in the medulla of the bone (bone marrow) and have the unique ability to give rise to all of the different mature blood cell types and tissues. HSCs are self... |
https://en.wikipedia.org/wiki/History%20of%20evolutionary%20thought | Evolutionary thought, the recognition that species change over time and the perceived understanding of how such processes work, has roots in antiquity—in the ideas of the ancient Greeks, Romans, Chinese, Church Fathers as well as in medieval Islamic science. With the beginnings of modern biological taxonomy in the late... |
https://en.wikipedia.org/wiki/Cruciate%20anastomosis | The cruciate anastomosis is a circulatory anastomosis in the upper thigh formed by the inferior gluteal artery, the lateral and medial circumflex femoral arteries, the first perforating artery of the deep femoral artery, and the anastomotic branch of the posterior branch of the obturator artery.
The cruciate anastomos... |
https://en.wikipedia.org/wiki/Version%20vector | A version vector is a mechanism for tracking changes to data in a distributed system, where multiple agents might update the data at different times. The version vector allows the participants to determine if one update preceded another (happened-before), followed it, or if the two updates happened concurrently (and th... |
https://en.wikipedia.org/wiki/Radium%20dial | Radium dials are watch, clock and other instrument dials painted with luminous paint containing radium-226 to produce radioluminescence. Radium dials were produced throughout most of the 20th century before being replaced by safer tritium-based luminous material in the 1970s and finally by non-toxic, non-radioactive st... |
https://en.wikipedia.org/wiki/Fr%C3%A9chet%20inequalities | In probabilistic logic, the Fréchet inequalities, also known as the Boole–Fréchet inequalities, are rules implicit in the work of George Boole and explicitly derived by Maurice Fréchet that govern the combination of probabilities about logical propositions or events logically linked together in conjunctions (AND operat... |
https://en.wikipedia.org/wiki/Allistatin | Allistatin is the collective name for two chemicals, allistatin I and allistatin II, which are found in garlic. It is a sulfur-free chemical and plays an active role within garlic. It is most likely a flavonoid.
There is no experimental evidence of the structure of allistatin; some studies claim it is similar to cyani... |
https://en.wikipedia.org/wiki/Ediacaran%20biota | The Ediacaran (; formerly Vendian) biota is a taxonomic period classification that consists of all life forms that were present on Earth during the Ediacaran Period (). These were enigmatic tubular and frond-shaped, mostly sessile, organisms. Trace fossils of these organisms have been found worldwide, and represent the... |
https://en.wikipedia.org/wiki/Rakuten%20Rewards | Rakuten Rewards (), formerly known as Ebates, is a cash-back and shopping rewards company. Its revenue comes from affiliate network links. Members of the site click through affiliate links before shopping at a retailer's site. Once the member makes a purchase, Rakuten Rewards receives an affiliate commission from the r... |
https://en.wikipedia.org/wiki/Antiresonance | In the physics of coupled oscillators, antiresonance, by analogy with resonance, is a pronounced minimum in the amplitude of an oscillator at a particular frequency, accompanied by a large, abrupt shift in its oscillation phase. Such frequencies are known as the system's antiresonant frequencies, and at these frequenci... |
https://en.wikipedia.org/wiki/Trajectory%20%28fluid%20mechanics%29 | In fluid mechanics, meteorology and oceanography, a trajectory traces the motion of a single point, often called a parcel, in the flow.
Trajectories are useful for tracking atmospheric contaminants, such as smoke plumes, and as constituents to Lagrangian simulations, such as contour advection or semi-Lagrangian scheme... |
https://en.wikipedia.org/wiki/U.S.-Vietnam%20Dialogue%20Group%20on%20Agent%20Orange/Dioxin | The U.S.-Vietnam Dialogue Group on Agent Orange/Dioxin was formally established in February 2007 as an initiative of prominent private citizens, scientists and policy-makers on both the Vietnamese and US sides, working on issues that the two countries’ governments have found difficult to address. It is not an implement... |
https://en.wikipedia.org/wiki/External%20sphincter%20muscle%20of%20female%20urethra | The external sphincter muscle of female urethra is a muscle which controls urination in females. The muscle fibers arise on either side from the margin of the inferior ramus of the pubis. They are directed across the pubic arch in front of the urethra, and pass around it to blend with the muscular fibers of the opposit... |
https://en.wikipedia.org/wiki/Marine%20biogeochemical%20cycles | Marine biogeochemical cycles are biogeochemical cycles that occur within marine environments, that is, in the saltwater of seas or oceans or the brackish water of coastal estuaries. These biogeochemical cycles are the pathways chemical substances and elements move through within the marine environment. In addition, sub... |
https://en.wikipedia.org/wiki/Timing%20mark | A timing mark is an indicator used for setting the timing of the ignition system of an engine, typically found on the crankshaft pulley (as pictured) or the flywheel. These have the largest radius rotating at crankshaft speed and therefore are the place where marks at one degree intervals will be farthest apart.
On ol... |
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