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https://en.wikipedia.org/wiki/FR-4 | FR-4 (or FR4) is a NEMA grade designation for glass-reinforced epoxy laminate material. FR-4 is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing).
"FR" stands for "flame retardant", and does not denote that the material complies with the st... |
https://en.wikipedia.org/wiki/Self-Monitoring%2C%20Analysis%20and%20Reporting%20Technology | Self-Monitoring, Analysis and Reporting Technology (S.M.A.R.T., often written as SMART) is a monitoring system included in computer hard disk drives (HDDs) and solid-state drives (SSDs). Its primary function is to detect and report various indicators of drive reliability with the intent of anticipating imminent hardwa... |
https://en.wikipedia.org/wiki/LexisNexis | LexisNexis is a part of the RELX corporation (formerly Reed Elsevier) that sells data analytics products and various databases that are accessed through online portals, including portals for computer-assisted legal research (CALR), newspaper search, and consumer information. During the 1970s, LexisNexis began to make l... |
https://en.wikipedia.org/wiki/Bendixson%E2%80%93Dulac%20theorem | In mathematics, the Bendixson–Dulac theorem on dynamical systems states that if there exists a function (called the Dulac function) such that the expression
has the same sign () almost everywhere in a simply connected region of the plane, then the plane autonomous system
has no nonconstant periodic solutions ... |
https://en.wikipedia.org/wiki/List%20of%20partial%20differential%20equation%20topics | This is a list of partial differential equation topics.
General topics
Partial differential equation
Nonlinear partial differential equation
list of nonlinear partial differential equations
Boundary condition
Boundary value problem
Dirichlet problem, Dirichlet boundary condition
Neumann boundary condition
Stefan pro... |
https://en.wikipedia.org/wiki/Hausdorff%20paradox | The Hausdorff paradox is a paradox in mathematics named after Felix Hausdorff. It involves the sphere (a 3-dimensional sphere in ). It states that if a certain countable subset is removed from , then the remainder can be divided into three disjoint subsets and such that and are all congruent. In particular, it fol... |
https://en.wikipedia.org/wiki/Ecotype | In evolutionary ecology, an ecotype, sometimes called ecospecies, describes a genetically distinct geographic variety, population, or race within a species, which is genotypically adapted to specific environmental conditions.
Typically, though ecotypes exhibit phenotypic differences (such as in morphology or physiolog... |
https://en.wikipedia.org/wiki/Dissipation%20factor | In physics, the dissipation factor (DF) is a measure of loss-rate of energy of a mode of oscillation (mechanical, electrical, or electromechanical) in a dissipative system. It is the reciprocal of quality factor, which represents the "quality" or durability of oscillation.
Explanation
Electrical potential energy is d... |
https://en.wikipedia.org/wiki/Vacuum%20chamber | A vacuum chamber is a rigid enclosure from which air and other gases are removed by a vacuum pump. This results in a low-pressure environment within the chamber, commonly referred to as a vacuum. A vacuum environment allows researchers to conduct physical experiments or to test mechanical devices which must operate in ... |
https://en.wikipedia.org/wiki/Index%20of%20evolutionary%20biology%20articles | This is a list of topics in evolutionary biology.
A
abiogenesis – adaptation – adaptive mutation – adaptive radiation – allele – allele frequency – allochronic speciation – allopatric speciation – altruism – : anagenesis – anti-predator adaptation – applications of evolution – aposematism – Archaeopteryx – aquatic ad... |
https://en.wikipedia.org/wiki/Green%20Hills%20Software | Green Hills Software is a privately owned company that builds operating systems and programming tools for embedded systems. The firm was founded in 1982 by Dan O'Dowd and Carl Rosenberg. Its headquarters are in Santa Barbara, California.
History
Green Hills Software and Wind River Systems enacted a 99-year contract as... |
https://en.wikipedia.org/wiki/Pidgin%20code | In computer programming, pidgin code is a mixture of several programming languages in the same program, or pseudocode that is a mixture of a programming language with natural language descriptions. Hence the name: the mixture is a programming language analogous to a pidgin in natural languages.
In numerical computatio... |
https://en.wikipedia.org/wiki/Might%20and%20Magic%20Book%20One%3A%20The%20Secret%20of%20the%20Inner%20Sanctum | Might and Magic Book One: Secret of the Inner Sanctum (also known as simply Might and Magic) is an early role-playing video game, first in the popular and influential Might and Magic franchise. It was released in 1986 as New World Computing's debut, ported to numerous platforms and re-released continuously through the ... |
https://en.wikipedia.org/wiki/Binary%20delta%20compression | Binary delta compression is a technology used in software deployment for distributing patches.
Explanation
Downloading large amounts of data over the Internet for software updates can induce high network traffic problems, especially when a network of computers is involved. Binary Delta Compression technology allows a... |
https://en.wikipedia.org/wiki/Transduction%20%28machine%20learning%29 | In logic, statistical inference, and supervised learning,
transduction or transductive inference is reasoning from
observed, specific (training) cases to specific (test) cases. In contrast,
induction is reasoning from observed training cases
to general rules, which are then applied to the test cases. The distinction is... |
https://en.wikipedia.org/wiki/Semantic%20security | In cryptography, a semantically secure cryptosystem is one where only negligible information about the plaintext can be feasibly extracted from the ciphertext. Specifically, any probabilistic, polynomial-time algorithm (PPTA) that is given the ciphertext of a certain message (taken from any distribution of messages), ... |
https://en.wikipedia.org/wiki/Schoenflies%20notation | The Schoenflies (or Schönflies) notation, named after the German mathematician Arthur Moritz Schoenflies, is a notation primarily used to specify point groups in three dimensions. Because a point group alone is completely adequate to describe the symmetry of a molecule, the notation is often sufficient and commonly use... |
https://en.wikipedia.org/wiki/TransUnion | TransUnion is an American consumer credit reporting agency. TransUnion collects and aggregates information on over one billion individual consumers in over thirty countries including "200 million files profiling nearly every credit-active consumer in the United States". Its customers include over 65,000 businesses. Bas... |
https://en.wikipedia.org/wiki/Equifax | Equifax Inc. is an American multinational consumer credit reporting agency headquartered in Atlanta, Georgia and is one of the three largest consumer credit reporting agencies, along with Experian and TransUnion (together known as the "Big Three"). Equifax collects and aggregates information on over 800 million indiv... |
https://en.wikipedia.org/wiki/Glycocalyx | The glycocalyx (: glycocalyces or glycocalyxes), also known as the pericellular matrix and sometime cell coat, is a glycoprotein and glycolipid covering that surrounds the cell membranes of bacteria, epithelial cells, and other cells. It was described in a review article in 1970.
Animal epithelial cells have a fuzz-li... |
https://en.wikipedia.org/wiki/196%20%28number%29 | 196 (one hundred [and] ninety-six) is the natural number following 195 and preceding 197.
In mathematics
196 is a square number, the square of 14. As the square of a Catalan number, it counts the number of walks of length 8 in the positive quadrant of the integer grid that start and end at the origin, moving diagonall... |
https://en.wikipedia.org/wiki/151%20%28number%29 | 151 (one hundred [and] fifty-one) is a natural number. It follows 150 and precedes 152.
In mathematics
151 is the 36th prime number, the previous is 149, with which it comprises a twin prime. 151 is also a palindromic prime, a centered decagonal number, and a lucky number.
151 appears in the Padovan sequence, precede... |
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/Goal%20difference | Goal difference, goal differential or points difference is a form of tiebreaker used to rank sport teams which finish on equal points in a league competition. Either "goal difference" or "points difference" is used, depending on whether matches are scored by goals (as in ice hockey and association football) or by point... |
https://en.wikipedia.org/wiki/SimLife | SimLife: The Genetic Playground is a video game produced by Maxis in 1992. The concept of the game is to simulate an ecosystem; players may modify the genetics of the plants and animals that inhabit the virtual world. The point of this game is to experiment and create a self-sustaining ecosystem. SimLife was re-release... |
https://en.wikipedia.org/wiki/Algebra%20of%20sets | In mathematics, the algebra of sets, not to be confused with the mathematical structure of an algebra of sets, defines the properties and laws of sets, the set-theoretic operations of union, intersection, and complementation and the relations of set equality and set inclusion. It also provides systematic procedures for... |
https://en.wikipedia.org/wiki/Gene%20gun | In genetic engineering, a gene gun or biolistic particle delivery system is a device used to deliver exogenous DNA (transgenes), RNA, or protein to cells. By coating particles of a heavy metal with a gene of interest and firing these micro-projectiles into cells using mechanical force, an integration of desired genetic... |
https://en.wikipedia.org/wiki/Superframe | In telecommunications, superframe (SF) is a T1 framing standard. In the 1970s it replaced the original T1/D1 framing scheme of the 1960s in which the framing bit simply alternated between 0 and 1.
Superframe is sometimes called D4 Framing to avoid confusion with single-frequency signaling. It was first supported by ... |
https://en.wikipedia.org/wiki/Solitude | Solitude, also known as social withdrawal, is a state of seclusion or isolation, meaning lack of socialisation. Effects can be either positive or negative, depending on the situation. Short-term solitude is often valued as a time when one may work, think, or rest without disturbance. It may be desired for the sake of p... |
https://en.wikipedia.org/wiki/Netcat | netcat (often abbreviated to nc) is a computer networking utility for reading from and writing to network connections using TCP or UDP. The command is designed to be a dependable back-end that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging a... |
https://en.wikipedia.org/wiki/Line%2010%20%28Beijing%20Subway%29 | Line 10 of the Beijing Subway () is the second loop line in Beijing's rapid transit network as well as the second longest and most widely used line. The line is in length, and runs entirely underground through Haidian, Chaoyang and Fengtai Districts, either directly underneath or just beyond the 3rd Ring Road. The Lin... |
https://en.wikipedia.org/wiki/ESET%20NOD32 | ESET NOD32 Antivirus, commonly known as NOD32, is an antivirus software package made by the Slovak company ESET. ESET NOD32 Antivirus is sold in two editions, Home Edition and Business Edition. The Business Edition packages add ESET Remote Administrator allowing for server deployment and management, mirroring of threat... |
https://en.wikipedia.org/wiki/Finitely%20generated%20group | In algebra, a finitely generated group is a group G that has some finite generating set S so that every element of G can be written as the combination (under the group operation) of finitely many elements of S and of inverses of such elements.
By definition, every finite group is finitely generated, since S can be t... |
https://en.wikipedia.org/wiki/Register-transfer%20level | In digital circuit design, register-transfer level (RTL) is a design abstraction which models a synchronous digital circuit in terms of the flow of digital signals (data) between hardware registers, and the logical operations performed on those signals.
Register-transfer-level abstraction is used in hardware descript... |
https://en.wikipedia.org/wiki/Hemp | Hemp, or industrial hemp, is a botanical class of Cannabis sativa cultivars grown specifically for industrial or medicinal use. The main difference between hemp and marijuana is their THC content. In legal terms, hemp or hemp products, must have less than 0.2 - 0.3% THC, depending on the country's laws. It can be used... |
https://en.wikipedia.org/wiki/Flags%20of%20the%20World%20%28website%29 | Flags of the World (abbreviated FOTW or FotW) is an Internet-based vexillological association and resource. Its principal project is the Internet's largest website devoted to vexillology, containing comprehensive information about various flags, and an associated mailing list. The mailing list began as a discussion gro... |
https://en.wikipedia.org/wiki/Modulus%20of%20continuity | In mathematical analysis, a modulus of continuity is a function ω : [0, ∞] → [0, ∞] used to measure quantitatively the uniform continuity of functions. So, a function f : I → R admits ω as a modulus of continuity if and only if
for all x and y in the domain of f. Since moduli of continuity are required to be infinites... |
https://en.wikipedia.org/wiki/Maurer%E2%80%93Cartan%20form | In mathematics, the Maurer–Cartan form for a Lie group is a distinguished differential one-form on that carries the basic infinitesimal information about the structure of . It was much used by Élie Cartan as a basic ingredient of his method of moving frames, and bears his name together with that of Ludwig Maurer.
As... |
https://en.wikipedia.org/wiki/Protoplast | Protoplast (), is a biological term coined by Hanstein in 1880 to refer to the entire cell, excluding the cell wall. Protoplasts can be generated by stripping the cell wall from plant, bacterial, or fungal cells by mechanical, chemical or enzymatic means.
Protoplasts differ from spheroplasts in that their cell wall h... |
https://en.wikipedia.org/wiki/Enterprise%20value | Enterprise value (EV), total enterprise value (TEV), or firm value (FV) is an economic measure reflecting the market value of a business (i.e. as distinct from market price). It is a sum of claims by all claimants: creditors (secured and unsecured) and shareholders (preferred and common). Enterprise value is one of the... |
https://en.wikipedia.org/wiki/Ramachandran%20plot | In biochemistry, a Ramachandran plot (also known as a Rama plot, a Ramachandran diagram or a [φ,ψ] plot), originally developed in 1963 by G. N. Ramachandran, C. Ramakrishnan, and V. Sasisekharan, is a way to visualize energetically allowed regions for backbone dihedral angles ψ against φ of amino acid residues in prote... |
https://en.wikipedia.org/wiki/CATH%20database | The CATH Protein Structure Classification database is a free, publicly available online resource that provides information on the evolutionary relationships of protein domains. It was created in the mid-1990s by Professor Christine Orengo and colleagues including Janet Thornton and David Jones, and continues to be deve... |
https://en.wikipedia.org/wiki/Automatic%20double%20tracking | Automatic double-tracking or artificial double-tracking (ADT) is an analogue recording technique designed to enhance the sound of voices or instruments during the mixing process. It uses tape delay to create a delayed copy of an audio signal which is then played back at slightly varying speed controlled by an oscillato... |
https://en.wikipedia.org/wiki/Cable%20modem%20termination%20system | A cable modem termination system (CMTS, also called a CMTS Edge Router) is a piece of equipment, typically located in a cable company's headend or hubsite, which is used to provide high speed data services, such as cable Internet or Voice over Internet Protocol, to cable subscribers. A CMTS provides many of the same fu... |
https://en.wikipedia.org/wiki/Antimicrobial | An antimicrobial is an agent that kills microorganisms (microbicide) or stops their growth (bacteriostatic agent). Antimicrobial medicines can be grouped according to the microorganisms they act primarily against. For example, antibiotics are used against bacteria, and antifungals are used against fungi. They can also ... |
https://en.wikipedia.org/wiki/Minimal%20counterexample | In mathematics, a minimal counterexample is the smallest example which falsifies a claim, and a proof by minimal counterexample is a method of proof which combines the use of a minimal counterexample with the ideas of proof by induction and proof by contradiction. More specifically, in trying to prove a proposition P, ... |
https://en.wikipedia.org/wiki/HD-MAC | HD-MAC (High Definition Multiplexed Analogue Components) was a broadcast television standard proposed by the European Commission in 1986, as part of Eureka 95 project. It belongs to the MAC - Multiplexed Analogue Components standard family. It is an early attempt by the EEC to provide High-definition television (HDTV) ... |
https://en.wikipedia.org/wiki/Stochastic%20resonance | Stochastic resonance (SR) is a phenomenon in which a signal that is normally too weak to be detected by a sensor, can be boosted by adding white noise to the signal, which contains a wide spectrum of frequencies. The frequencies in the white noise corresponding to the original signal's frequencies will resonate with ea... |
https://en.wikipedia.org/wiki/Module%20file | Module file (MOD music, tracker music) is a family of music file formats originating from the MOD file format on Amiga systems used in the late 1980s. Those who produce these files (using the software called music trackers) and listen to them form the worldwide MOD scene, a part of the demoscene subculture.
The mass i... |
https://en.wikipedia.org/wiki/Center%20tap | In electronics, a center tap (CT) is a contact made to a point halfway along a winding of a transformer or inductor, or along the element of a resistor or a potentiometer.
Taps are sometimes used on inductors for the coupling of signals, and may not necessarily be at the half-way point, but rather, closer to one end. ... |
https://en.wikipedia.org/wiki/Burroughs%20MCP | The MCP (Master Control Program) is the operating system of the Burroughs B5000/B5500/B5700 and the B6500 and successors, including the Unisys Clearpath/MCP systems.
MCP was originally written in 1961 in ESPOL (Executive Systems Problem Oriented Language). In the 1970s, MCP was converted to NEWP which was a better str... |
https://en.wikipedia.org/wiki/Leafnode | Leafnode is a store-and-forward NNTP (or Usenet) proxy server designed for small sites with just a few active newsgroups, but very easy to set up and maintain, when compared to INN. Originally created by Arnt Gulbrandsen in 1995 while he was working at Trolltech, it is currently maintained by Matthias Andree and Ral... |
https://en.wikipedia.org/wiki/DNA-binding%20protein | DNA-binding proteins are proteins that have DNA-binding domains and thus have a specific or general affinity for single- or double-stranded DNA. Sequence-specific DNA-binding proteins generally interact with the major groove of B-DNA, because it exposes more functional groups that identify a base pair.
Examples
DNA-bi... |
https://en.wikipedia.org/wiki/Isoelectric%20focusing | Isoelectric focusing (IEF), also known as electrofocusing, is a technique for separating different molecules by differences in their isoelectric point (pI). It is a type of zone electrophoresis usually performed on proteins in a gel that takes advantage of the fact that overall charge on the molecule of interest is a f... |
https://en.wikipedia.org/wiki/Valuation%20ring | In abstract algebra, a valuation ring is an integral domain D such that for every element x of its field of fractions F, at least one of x or x−1 belongs to D.
Given a field F, if D is a subring of F such that either x or x−1 belongs to
D for every nonzero x in F, then D is said to be a valuation ring for the field F ... |
https://en.wikipedia.org/wiki/Edman%20degradation | Edman degradation, developed by Pehr Edman, is a method of sequencing amino acids in a peptide. In this method, the amino-terminal residue is labeled and cleaved from the peptide without disrupting the peptide bonds between other amino acid residues.
Mechanism
Phenyl isothiocyanate is reacted with an uncharged N-ter... |
https://en.wikipedia.org/wiki/Bottling%20line | Bottling lines are production lines that fill a product, generally a beverage, into bottles on a large scale. Many prepared foods are also bottled, such as sauces, syrups, marinades, oils and vinegars.
Beer bottling process
Packaging of bottled beer typically involves drawing the product from a holding tank and filli... |
https://en.wikipedia.org/wiki/Tine%20test | The tine test is a multiple-puncture tuberculin skin test used to aid in the medical diagnosis of tuberculosis (TB). The tine test is similar to the Heaf test, although the Mantoux test is usually used instead. There are multiple forms of the tine tests which usually fall into two categories: the old tine test (OT) an... |
https://en.wikipedia.org/wiki/Prehensility | Prehensility is the quality of an appendage or organ that has adapted for grasping or holding. The word is derived from the Latin term prehendere, meaning "to grasp". The ability to grasp is likely derived from a number of different origins. The most common are tree-climbing and the need to manipulate food.
Examples
... |
https://en.wikipedia.org/wiki/Sol%20LeWitt | Solomon "Sol" LeWitt (September 9, 1928 – April 8, 2007) was an American artist linked to various movements, including conceptual art and minimalism.
LeWitt came to fame in the late 1960s with his wall drawings and "structures" (a term he preferred instead of "sculptures") but was prolific in a wide range of media inc... |
https://en.wikipedia.org/wiki/Vortex%20tube | The vortex tube, also known as the Ranque-Hilsch vortex tube, is a mechanical device that separates a compressed gas into hot and cold streams. The gas emerging from the hot end can reach temperatures of , and the gas emerging from the cold end can reach . It has no moving parts and is considered an environmentally fri... |
https://en.wikipedia.org/wiki/Temporal%20Key%20Integrity%20Protocol | Temporal Key Integrity Protocol (TKIP ) is a security protocol used in the IEEE 802.11 wireless networking standard. TKIP was designed by the IEEE 802.11i task group and the Wi-Fi Alliance as an interim solution to replace WEP without requiring the replacement of legacy hardware. This was necessary because the breaking... |
https://en.wikipedia.org/wiki/Preimage%20attack | In cryptography, a preimage attack on cryptographic hash functions tries to find a message that has a specific hash value. A cryptographic hash function should resist attacks on its preimage (set of possible inputs).
In the context of attack, there are two types of preimage resistance:
preimage resistance: for esse... |
https://en.wikipedia.org/wiki/Collision%20attack | In cryptography, a collision attack on a cryptographic hash tries to find two inputs producing the same hash value, i.e. a hash collision. This is in contrast to a preimage attack where a specific target hash value is specified.
There are roughly two types of collision attacks:
Classical collision attack Find two diff... |
https://en.wikipedia.org/wiki/Livestock%20branding | Livestock branding is a technique for marking livestock so as to identify the owner. Originally, livestock branding only referred to hot branding large stock with a branding iron, though the term now includes alternative techniques. Other forms of livestock identification include freeze branding, inner lip or ear tatto... |
https://en.wikipedia.org/wiki/Pit%20sword | The pit sword (also known as a rodmeter) is a blade of metal or plastic that extends into the water beneath the hull of a ship. It is part of the pitometer log, a device for measuring the ship's speed through the water.
See also
Electromagnetic log
Pitot tube
References
External links
Historical site with informati... |
https://en.wikipedia.org/wiki/Cyrix%20Cx486SLC | The Cyrix Cx486SLC is a x86 microprocessor that was developed by Cyrix. It was one of Cyrix's first CPU offerings, released after years of selling math coprocessors that competed with Intel's units and offered better performance at a comparable or lower price. It was announced in March of 1992, and released 2 months la... |
https://en.wikipedia.org/wiki/Byzantine%20fault | A Byzantine fault (also Byzantine generals problem, interactive consistency, source congruency, error avalanche, Byzantine agreement problem, and Byzantine failure) is a condition of a computer system, particularly distributed computing systems, where components may fail and there is imperfect information on whether a ... |
https://en.wikipedia.org/wiki/Specific%20absorption%20rate | Specific absorption rate (SAR) is a measure of the rate at which energy is absorbed per unit mass by a human body when exposed to a radio frequency (RF) electromagnetic field. It is defined as the power absorbed per mass of tissue and has units of watts per kilogram (W/kg).
SAR is usually averaged either over the whol... |
https://en.wikipedia.org/wiki/Aspic | Aspic or meat jelly () is a savory gelatin made with a meat stock or broth, set in a mold to encase other ingredients. These often include pieces of meat, seafood, vegetable, or eggs. Aspic is also sometimes referred to as aspic gelée or aspic jelly. In its simplest form, aspic is essentially a gelatinous version of co... |
https://en.wikipedia.org/wiki/Total%20least%20squares | In applied statistics, total least squares is a type of errors-in-variables regression, a least squares data modeling technique in which observational errors on both dependent and independent variables are taken into account. It is a generalization of Deming regression and also of orthogonal regression, and can be appl... |
https://en.wikipedia.org/wiki/Mathematical%20Alphanumeric%20Symbols | Mathematical Alphanumeric Symbols is a Unicode block comprising styled forms of Latin and Greek letters and decimal digits that enable mathematicians to denote different notions with different letter styles. The letters in various fonts often have specific, fixed meanings in particular areas of mathematics. By providin... |
https://en.wikipedia.org/wiki/Reductive%20dechlorination | In organochlorine chemistry, reductive dechlorination describes any chemical reaction which cleaves the covalent bond between carbon and chlorine via reductants, to release chloride ions. Many modalities have been implemented, depending on the application. Reductive dechlorination is often applied to remediation of ch... |
https://en.wikipedia.org/wiki/Iptables | iptables is a user-space utility program that allows a system administrator to configure the IP packet filter rules of the Linux kernel firewall, implemented as different Netfilter modules. The filters are organized in different tables, which contain chains of rules for how to treat network traffic packets. Different k... |
https://en.wikipedia.org/wiki/Web%20Proxy%20Auto-Discovery%20Protocol | The Web Proxy Auto-Discovery (WPAD) Protocol is a method used by clients to locate the URL of a configuration file using DHCP and/or DNS discovery methods. Once detection and download of the configuration file is complete, it can be executed to determine the proxy for a specified URL.
History
The WPAD protocol only ou... |
https://en.wikipedia.org/wiki/Primordial%20sandwich | The concept of the primordial sandwich was proposed by the chemist Günter Wächtershäuser to describe the possible origins of the first cell membranes, and, therefore, the first cell.
According to the two main models of abiogenesis, RNA world and iron-sulfur world, prebiotic processes existed before the development of ... |
https://en.wikipedia.org/wiki/Zigzag | A zigzag is a pattern made up of small corners at variable angles, though constant within the zigzag, tracing a path between two parallel lines; it can be described as both jagged and fairly regular.
In geometry, this pattern is described as a skew apeirogon. From the point of view of symmetry, a regular zigzag can be... |
https://en.wikipedia.org/wiki/Wedderburn%E2%80%93Etherington%20number | The Wedderburn–Etherington numbers are an integer sequence named for Ivor Malcolm Haddon Etherington and Joseph Wedderburn that can be used to count certain kinds of binary trees. The first few numbers in the sequence are
0, 1, 1, 1, 2, 3, 6, 11, 23, 46, 98, 207, 451, 983, 2179, 4850, 10905, 24631, 56011, ... ()
Combi... |
https://en.wikipedia.org/wiki/Highly%20totient%20number | A highly totient number is an integer that has more solutions to the equation , where is Euler's totient function, than any integer below it. The first few highly totient numbers are
1, 2, 4, 8, 12, 24, 48, 72, 144, 240, 432, 480, 576, 720, 1152, 1440 , with 2, 3, 4, 5, 6, 10, 11, 17, 21, 31, 34, 37, 38, 49, 54, and... |
https://en.wikipedia.org/wiki/British%20National%20Vegetation%20Classification |
The British National Vegetation Classification or NVC is a system of classifying natural habitat types in Great Britain according to the vegetation they contain.
A large scientific meeting of ecologists, botanists, and other related professionals in the United Kingdom resulted in the publication of a compendium of f... |
https://en.wikipedia.org/wiki/Elementary%20equivalence | In model theory, a branch of mathematical logic, two structures M and N of the same signature σ are called elementarily equivalent if they satisfy the same first-order σ-sentences.
If N is a substructure of M, one often needs a stronger condition. In this case N is called an elementary substructure of M if every first... |
https://en.wikipedia.org/wiki/Single-photon%20avalanche%20diode | A single-photon avalanche diode (SPAD) is a solid-state photodetector within the same family as photodiodes and avalanche photodiodes (APDs), while also being fundamentally linked with basic diode behaviours. As with photodiodes and APDs, a SPAD is based around a semi-conductor p-n junction that can be illuminated with... |
https://en.wikipedia.org/wiki/CCMP%20%28cryptography%29 | Counter Mode Cipher Block Chaining Message Authentication Code Protocol (Counter Mode CBC-MAC Protocol) or CCM mode Protocol (CCMP) is an encryption protocol designed for Wireless LAN products that implements the standards of the IEEE 802.11i amendment to the original IEEE 802.11 standard. CCMP is an enhanced data cryp... |
https://en.wikipedia.org/wiki/PC%20Weasel%202000 | PC Weasel 2000 was a line of graphics cards designed by Middle Digital Incorporated (Herb Peyerl and Jonathan Levine) which output to a serial port instead of a monitor. This allows servers using PC hardware with conventional BIOSes or operating systems lacking serial capability to be administered remotely.
The produc... |
https://en.wikipedia.org/wiki/List%20of%20sensors | This is a list of sensors sorted by sensor type.
Acoustic, sound, vibration
Geophone
Hydrophone
Microphone
Pickup
Seismometer
Sound locator
Automotive
Air flow meter
AFR sensor
Air–fuel ratio meter
Blind spot monitor
Crankshaft position sensor (CKP)
Curb feeler
Defect detector
Engine coolant temperature sensor
Ha... |
https://en.wikipedia.org/wiki/USDA%20soil%20taxonomy | USDA soil taxonomy (ST) developed by the United States Department of Agriculture and the National Cooperative Soil Survey provides an elaborate classification of soil types according to several parameters (most commonly their properties) and in several levels: Order, Suborder, Great Group, Subgroup, Family, and Series.... |
https://en.wikipedia.org/wiki/Tong%20Dizhou | Tong Dizhou (; May 28, 1902 – March 30, 1979) was a Chinese embryologist known for his contributions to the field of cloning. He was a vice president of Chinese Academy of Science.
Biography
Born in Yinxian, Zhejiang province, Tong graduated from Fudan University in 1924 with a degree in biology, and received a PhD in... |
https://en.wikipedia.org/wiki/IBM%20Future%20Systems%20project | The Future Systems project (FS) was a research and development project undertaken in IBM in the early 1970s, aiming to develop a revolutionary line of computer products, including new software models which would simplify software development by exploiting modern powerful hardware.
History
Background
Until the end of ... |
https://en.wikipedia.org/wiki/Pseudo-differential%20operator | In mathematical analysis a pseudo-differential operator is an extension of the concept of differential operator. Pseudo-differential operators are used extensively in the theory of partial differential equations and quantum field theory, e.g. in mathematical models that include ultrametric pseudo-differential equation... |
https://en.wikipedia.org/wiki/Addition%20theorem | In mathematics, an addition theorem is a formula such as that for the exponential function:
ex + y = ex · ey,
that expresses, for a particular function f, f(x + y) in terms of f(x) and f(y). Slightly more generally, as is the case with the trigonometric functions and , several functions may be involved; this is more... |
https://en.wikipedia.org/wiki/Security%20Assertion%20Markup%20Language | Security Assertion Markup Language (SAML, pronounced SAM-el, ) is an open standard for exchanging authentication and authorization data between parties, in particular, between an identity provider and a service provider. SAML is an XML-based markup language for security assertions (statements that service providers use... |
https://en.wikipedia.org/wiki/TickIT | TickIT is a certification program for companies in the software development and computer industries, supported primarily by the United Kingdom and Swedish industries through UKAS and SWEDAC respectively. Its general objective is to improve software quality.
History
In the 1980s, the UK government's CCTA organisation p... |
https://en.wikipedia.org/wiki/Clerk%20of%20works | A clerk of works or clerk of the works (CoW) is employed by an architect or a client on a construction site. The role is primarily to represent the interests of the client in regard to ensuring that the quality of both materials and workmanship are in accordance with the design information such as specification and eng... |
https://en.wikipedia.org/wiki/List%20of%20manifolds | This is a list of particular manifolds, by Wikipedia page. See also list of geometric topology topics. For categorical listings see :Category:Manifolds and its subcategories.
Generic families of manifolds
Euclidean space, Rn
n-sphere, Sn
n-torus, Tn
Real projective space, RPn
Complex projective space, CPn
Quate... |
https://en.wikipedia.org/wiki/Backstaff | The backstaff is a navigational instrument that was used to measure the altitude of a celestial body, in particular the Sun or Moon. When observing the Sun, users kept the Sun to their back (hence the name) and observed the shadow cast by the upper vane on a horizon vane. It was invented by the English navigator John D... |
https://en.wikipedia.org/wiki/Algebraic%20function | In mathematics, an algebraic function is a function that can be defined
as the root of an irreducible polynomial equation. Quite often algebraic functions are algebraic expressions using a finite number of terms, involving only the algebraic operations addition, subtraction, multiplication, division, and raising to a ... |
https://en.wikipedia.org/wiki/Ring%20circuit | In electricity supply design, a ring circuit is an electrical wiring technique in which sockets and the distribution point are connected in a ring. It is contrasted with the usual radial circuit, in which sockets and the distribution point are connected in a line with the distribution point at one end.
Ring circuits ... |
https://en.wikipedia.org/wiki/Bulkhead%20line | Bulkhead line is an officially set line along a shoreline, usually beyond the dry land, to demark a territory allowable to be treated as dry land, to separate the jurisdictions of dry land and water authorities, for construction and riparian activities, to establish limits to the allowable obstructions to navigation an... |
https://en.wikipedia.org/wiki/Exterior%20Gateway%20Protocol | The Exterior Gateway Protocol (EGP) was a routing protocol used to connect different autonomous systems on the Internet from the mid-1980s until the mid-1990s, when it was replaced by Border Gateway Protocol (BGP).
History
EGP was developed by Bolt, Beranek and Newman in the early 1980s. It was first described in RFC ... |
https://en.wikipedia.org/wiki/Data%20manipulation%20language | A data manipulation language (DML) is a computer programming language used for adding (inserting), deleting, and modifying (updating) data in a database. A DML is often a sublanguage of a broader database language such as SQL, with the DML comprising some of the operators in the language. Read-only selecting of data is... |
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