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https://en.wikipedia.org/wiki/Hilbert%27s%20eleventh%20problem | Hilbert's eleventh problem is one of David Hilbert's list of open mathematical problems posed at the Second International Congress of Mathematicians in Paris in 1900. A furthering of the theory of quadratic forms, he stated the problem as follows:
Our present knowledge of the theory of quadratic number fields puts us ... |
https://en.wikipedia.org/wiki/Male | Male (symbol: ♂) is the sex of an organism that produces the gamete (sex cell) known as sperm, which fuses with the larger female gamete, or ovum, in the process of fertilization.
A male organism cannot reproduce sexually without access to at least one ovum from a female, but some organisms can reproduce both sexually ... |
https://en.wikipedia.org/wiki/Thermodynamic%20versus%20kinetic%20reaction%20control | Thermodynamic reaction control or kinetic reaction control in a chemical reaction can decide the composition in a reaction product mixture when competing pathways lead to different products and the reaction conditions influence the selectivity or stereoselectivity. The distinction is relevant when product A forms faste... |
https://en.wikipedia.org/wiki/Cointegration | Cointegration is a statistical property of a collection of time series variables. First, all of the series must be integrated of order d (see Order of integration). Next, if a linear combination of this collection is integrated of order less than d, then the collection is said to be co-integrated. Formally, if (X,Y,Z)... |
https://en.wikipedia.org/wiki/DNA%20fragmentation | DNA fragmentation is the separation or breaking of DNA strands into pieces. It can be done intentionally by laboratory personnel or by cells, or can occur spontaneously. Spontaneous or accidental DNA fragmentation is fragmentation that gradually accumulates in a cell. It can be measured by e.g. the Comet assay or by th... |
https://en.wikipedia.org/wiki/Clock%20skew | Clock skew (sometimes called timing skew) is a phenomenon in synchronous digital circuit systems (such as computer systems) in which the same sourced clock signal arrives at different components at different times due to gate or, in more advanced semiconductor technology, wire signal propagation delay. The instantaneou... |
https://en.wikipedia.org/wiki/Diffusion%20capacitance | Diffusion Capacitance is the capacitance that happens due to transport of charge carriers between two terminals of a device, for example, the diffusion of carriers from anode to cathode in a forward biased diode or from emitter to base in a forward-biased junction of a transistor. In a semiconductor device with a curr... |
https://en.wikipedia.org/wiki/Cartesian%20tensor | In geometry and linear algebra, a Cartesian tensor uses an orthonormal basis to represent a tensor in a Euclidean space in the form of components. Converting a tensor's components from one such basis to another is done through an orthogonal transformation.
The most familiar coordinate systems are the two-dimensional a... |
https://en.wikipedia.org/wiki/Silverman%E2%80%93Toeplitz%20theorem | In mathematics, the Silverman–Toeplitz theorem, first proved by Otto Toeplitz, is a result in summability theory characterizing matrix summability methods that are regular. A regular matrix summability method is a matrix transformation of a convergent sequence which preserves the limit.
An infinite matrix with comple... |
https://en.wikipedia.org/wiki/Orifice%20plate | An orifice plate is a device used for measuring flow rate, for reducing pressure or for restricting flow (in the latter two cases it is often called a ).
Description
An orifice plate is a thin plate with a hole in it, which is usually placed in a pipe. When a fluid (whether liquid or gaseous) passes through the orif... |
https://en.wikipedia.org/wiki/Triangle%20of%20U | The triangle of U ( ) is a theory about the evolution and relationships among the six most commonly known members of the plant genus Brassica. The theory states that the genomes of three ancestral diploid species of Brassica combined to create three common tetraploid vegetables and oilseed crop species. It has since be... |
https://en.wikipedia.org/wiki/Identity%20document%20forgery | Identity document forgery is the process by which identity documents issued by governing bodies are copied and/or modified by persons not authorized to create such documents or engage in such modifications, for the purpose of deceiving those who would view the documents about the identity or status of the bearer. The t... |
https://en.wikipedia.org/wiki/Miracle%20Planet | Miracle Planet is a six-part documentary series, co-produced by Japan's NHK and the National Film Board of Canada (NFB), narrated by Christopher Plummer (Seiko Nakajo in the original Japanese), which tells the 4.6-billion-year-old story of how life has evolved from its humble beginnings to the diversity of living creat... |
https://en.wikipedia.org/wiki/InnoDB | InnoDB is a storage engine for the database management system MySQL and MariaDB. Since the release of MySQL 5.5.5 in 2010, it replaced MyISAM as MySQL's default table type. It provides the standard ACID-compliant transaction features, along with foreign key support (Declarative Referential Integrity). It is included a... |
https://en.wikipedia.org/wiki/The%20Swallow%27s%20Tail | The Swallow's Tail — Series of Catastrophes () was Salvador Dalí's last painting. It was completed in May 1983, as the final part of a series based on the mathematical catastrophe theory of René Thom.
Thom suggested that in four-dimensional phenomena, there are seven possible equilibrium surfaces, and therefore seven ... |
https://en.wikipedia.org/wiki/Medion | Medion AG is a German consumer electronics company, and a subsidiary of Chinese multinational technology company Lenovo. The company operates in Europe, Turkey, Asia-Pacific, United States and Australia regions. The company's main products are computers and notebooks, but also smartphones, tablet computers, digital cam... |
https://en.wikipedia.org/wiki/Subclass%20%28set%20theory%29 | In set theory and its applications throughout mathematics, a subclass is a class contained in some other class in the same way that a subset is a set contained in some other set.
That is, given classes A and B, A is a subclass of B if and only if every member of A is also a member of B.
If A and B are sets, then of co... |
https://en.wikipedia.org/wiki/Colatitude | In a spherical coordinate system, a colatitude is the complementary angle of a given latitude, i.e. the difference between a right angle and the latitude. Here Southern latitudes are defined to be negative, and as a result the colatitude is a non-negative quantity, ranging from zero at the North pole to 180° at the Sou... |
https://en.wikipedia.org/wiki/Glazier | A glazier is a tradesperson responsible for cutting, installing, and removing glass (and materials used as substitutes for glass, such as some plastics). They also refer to blueprints to figure out the size, shape, and location of the glass in the building. They may have to consider the type and size of scaffolding the... |
https://en.wikipedia.org/wiki/Amyl%20acetate | Amyl acetate (pentyl acetate) is an organic compound and an ester with the chemical formula CH3COO[CH2]4CH3 and the molecular weight 130.19g/mol. It is colorless and has a scent similar to bananas and apples. The compound is the condensation product of acetic acid and 1-pentanol. However, esters formed from other pent... |
https://en.wikipedia.org/wiki/Percent-encoding | URL encoding, officially known as percent-encoding, is a method to encode arbitrary data in a Uniform Resource Identifier (URI) using only the limited US-ASCII characters legal within a URI. Although it is known as URL encoding, it is also used more generally within the main Uniform Resource Identifier (URI) set, which... |
https://en.wikipedia.org/wiki/Intermittent%20rhythmic%20delta%20activity | Intermittent rhythmic delta activity (IRDA) is a type of brain wave abnormality found in electroencephalograms (EEG).
Types
It can be classified based on the area of brain it originates from:
frontal (FIRDA)
occipital (OIRDA)
temporal (TIRDA)
It can also be
Unilateral
Bilateral
Cause
It can be caused by a numb... |
https://en.wikipedia.org/wiki/RANAP | In telecommunications networks, RANAP (Radio Access Network Application Part) is a protocol specified by 3GPP in TS 25.413
and used in UMTS for signaling between the Core Network, which can be a MSC or SGSN, and the UTRAN. RANAP is carried over Iu-interface.
RANAP signalling protocol resides in the control plane of Ra... |
https://en.wikipedia.org/wiki/DOM%20Inspector | DOM Inspector (DOMi) is a web developer tool created by Joe Hewitt and was originally included in Mozilla Application Suite as well as versions of Mozilla Firefox prior to Firefox 3. It is now included in Firefox, and SeaMonkey. Its main purpose is to inspect and edit the Document Object Model (DOM) tree of HTML and XM... |
https://en.wikipedia.org/wiki/Gerald%20Weinberg | Gerald Marvin Weinberg (October 27, 1933 – August 7, 2018) was an American computer scientist, author and teacher of the psychology and anthropology of computer software development. His most well-known books are The Psychology of Computer Programming and Introduction to General Systems Thinking.
Biography
Gerald Wei... |
https://en.wikipedia.org/wiki/Bijection%2C%20injection%20and%20surjection | In mathematics, injections, surjections, and bijections are classes of functions distinguished by the manner in which arguments (input expressions from the domain) and images (output expressions from the codomain) are related or mapped to each other.
A function maps elements from its domain to elements in its codomain... |
https://en.wikipedia.org/wiki/Saturation%20arithmetic | Saturation arithmetic is a version of arithmetic in which all operations, such as addition and multiplication, are limited to a fixed range between a minimum and maximum value.
If the result of an operation is greater than the maximum, it is set ("clamped") to the maximum; if it is below the minimum, it is clamped to ... |
https://en.wikipedia.org/wiki/Iterative%20closest%20point | Iterative closest point (ICP) is an algorithm employed to minimize the difference between two clouds of points. ICP is often used to reconstruct 2D or 3D surfaces from different scans, to localize robots and achieve optimal path planning (especially when wheel odometry is unreliable due to slippery terrain), to co-regi... |
https://en.wikipedia.org/wiki/Akilia | Akilia Island is an island in southwestern Greenland, about 22 kilometers south of Nuuk. Akilia is the location of a rock formation that has been proposed to contain the oldest known sedimentary rocks on Earth, and perhaps the oldest evidence of life on Earth.
Geology
The rocks in question are part of a metamorphosed ... |
https://en.wikipedia.org/wiki/Pseudoextinction | Pseudoextinction (or phyletic extinction) of a species occurs when all members of the species are extinct, but members of a daughter species remain alive. The term pseudoextinction refers to the evolution of a species into a new form, with the resultant disappearance of the ancestral form. Pseudoextinction results in t... |
https://en.wikipedia.org/wiki/Motorola%2068881 | The Motorola 68881 and Motorola 68882 are floating-point units (FPUs) used in some computer systems in conjunction with Motorola's 32-bit 68020 or 68030 microprocessors. These coprocessors are external chips, designed before floating point math became standard on CPUs. The Motorola 68881 was introduced in 1984. The 688... |
https://en.wikipedia.org/wiki/4B5B | In telecommunication, 4B5B is a form of data communications line code. 4B5B maps groups of 4 bits of data onto groups of 5 bits for transmission. These 5-bit words are pre-determined in a dictionary and they are chosen to ensure that there will be sufficient transitions in the line state to produce a self-clocking sign... |
https://en.wikipedia.org/wiki/Hyetograph | A hyetograph is a graphical representation of the distribution of rainfall intensity over time. For instance, in the 24-hour rainfall distributions as developed by the Soil Conservation Service (now the NRCS or National Resources Conservation Service), rainfall intensity progressively increases until it reaches a maxim... |
https://en.wikipedia.org/wiki/Eddy%20current%20brake | An eddy current brake, also known as an induction brake, Faraday brake, electric brake or electric retarder, is a device used to slow or stop a moving object by generating eddy currents and thus dissipating its kinetic energy as heat. Unlike friction brakes, where the drag force that stops the moving object is provided... |
https://en.wikipedia.org/wiki/IEEE%20802.21 | The IEEE 802.21 refers to Media Independent Handoff (MIH) and is an IEEE standard published in 2008. The standard supports algorithms enabling seamless handover between wired and wireless networks of the same type as well as handover between different wired and wireless network types also called Media independent hando... |
https://en.wikipedia.org/wiki/Internet%20studies | Internet studies is an interdisciplinary field studying the social, psychological, political, technical, cultural and other dimensions of the Internet and associated information and communication technologies. The human aspects of the Internet are a subject of focus in this field. While that may be facilitated by the u... |
https://en.wikipedia.org/wiki/PEPA | Performance Evaluation Process Algebra (PEPA) is a stochastic process algebra designed for modelling computer and communication systems introduced by Jane Hillston in the 1990s. The language extends classical process algebras such as Milner's CCS and Hoare's CSP by introducing probabilistic branching and timing of tran... |
https://en.wikipedia.org/wiki/Handel%20%28warning%20system%29 | Handel was the code-name for the UK's national attack warning system in the Cold War. It consisted of a small console with two microphones, lights and gauges. The reason behind this was to provide a back-up if anything failed.
If an enemy airstrike was detected, a key on the left-hand side of the console would be turn... |
https://en.wikipedia.org/wiki/Phase%20synchronization | Phase synchronization is the process by which two or more cyclic signals tend to oscillate with a repeating sequence of relative phase angles.
Phase synchronisation is usually applied to two waveforms of the same frequency with identical phase angles with each cycle. However it can be applied if there is an integer re... |
https://en.wikipedia.org/wiki/Parametric%20derivative | In calculus, a parametric derivative is a derivative of a dependent variable with respect to another dependent variable that is taken when both variables depend on an independent third variable, usually thought of as "time" (that is, when the dependent variables are x and y and are given by parametric equations in t).
... |
https://en.wikipedia.org/wiki/List%20of%20tundra%20ecoregions | A list of tundra ecoregions from the World Wide Fund for Nature (WWF) includes:
See also
Tundra
External links
Arctic tundra biome information from the WWF
Alpine tundra information from the WWF
The Arctic biome at Classroom of the Future
References
Tundra
Tundra |
https://en.wikipedia.org/wiki/Superhelix | A superhelix is a molecular structure in which a helix is itself coiled into a helix. This is significant to both proteins and genetic material, such as overwound circular DNA.
The earliest significant reference in molecular biology is from 1971, by F. B. Fuller:
A geometric invariant of a space curve, the writhing n... |
https://en.wikipedia.org/wiki/VSAN | A virtual storage area network (virtual SAN, VSAN or vSAN) is a logical representation of a physical storage area network (SAN). A VSAN abstracts the storage-related operations from the physical storage layer, and provides shared storage access to the applications and virtual machines by combining the servers' local st... |
https://en.wikipedia.org/wiki/Derating | In electronics, derating is the operation of a device at less than its rated maximum capability to prolong its life. Typical examples include operations below the maximum power rating, current rating, or voltage rating.
In electronics
Power semiconductor devices have a maximum power dissipation rating usually quoted ... |
https://en.wikipedia.org/wiki/Graphics%20device%20interface | A graphics device interface is a subsystem that most operating systems use for representing graphical objects and transmitting them to output devices such as monitors and printers. In most cases, the graphics device interface is only able to draw 2D graphics and simple 3D graphics, in order to make use of more advanced... |
https://en.wikipedia.org/wiki/WeatherStar | WeatherStar (sometimes rendered Weather Star or WeatherSTAR; "STAR" being an acronym for Satellite Transponder Addressable Receiver) is the technology used by American cable and satellite television network The Weather Channel (TWC) to generate its local forecast segments—branded as Local on the 8s (LOT8s) since 2002 a... |
https://en.wikipedia.org/wiki/Differential-algebraic%20system%20of%20equations | In electrical engineering, a differential-algebraic system of equations (DAE) is a system of equations that either contains differential equations and algebraic equations, or is equivalent to such a system.
In mathematics these are examples of differential algebraic varieties and correspond to ideals in differential po... |
https://en.wikipedia.org/wiki/Serpent%27s%20Wall | Serpent's Wall () is an ancient system of earthworks (valla) located in the middle Dnieper Ukraine (Naddniprianshchyna) that stretch across primarily Kyiv Oblast, Ukraine. They seem to be similar in purpose and character to Trajan's Wall situated to the southwest in Bessarabia. The remaining ancient walls have a total... |
https://en.wikipedia.org/wiki/Nassi%E2%80%93Shneiderman%20diagram | A Nassi–Shneiderman diagram (NSD) in computer programming is a graphical design representation for structured programming. This type of diagram was developed in 1972 by Isaac Nassi and Ben Shneiderman who were both graduate students at Stony Brook University. These diagrams are also called structograms, as they show a ... |
https://en.wikipedia.org/wiki/Nakayama%27s%20lemma | In mathematics, more specifically abstract algebra and commutative algebra, Nakayama's lemma — also known as the Krull–Azumaya theorem — governs the interaction between the Jacobson radical of a ring (typically a commutative ring) and its finitely generated modules. Informally, the lemma immediately gives a precise se... |
https://en.wikipedia.org/wiki/Ion%20beam-assisted%20deposition | Ion beam assisted deposition or IBAD or IAD (not to be confused with ion beam induced deposition, IBID) is a materials engineering technique which combines ion implantation with simultaneous sputtering or another physical vapor deposition technique. Besides providing independent control of parameters such as ion energ... |
https://en.wikipedia.org/wiki/Titanium%20nitride | Titanium nitride (TiN; sometimes known as tinite) is an extremely hard ceramic material, often used as a physical vapor deposition (PVD) coating on titanium alloys, steel, carbide, and aluminium components to improve the substrate's surface properties.
Applied as a thin coating, TiN is used to harden and protect cutti... |
https://en.wikipedia.org/wiki/Teichm%C3%BCller%20space | In mathematics, the Teichmüller space of a (real) topological (or differential) surface is a space that parametrizes complex structures on up to the action of homeomorphisms that are isotopic to the identity homeomorphism. Teichmüller spaces are named after Oswald Teichmüller.
Each point in a Teichmüller space may... |
https://en.wikipedia.org/wiki/Remote%20digital%20terminal | In telecommunications, a remote digital terminal (RDT) typically accepts E1, T1 or OC-3 digital lines to communicate with a telephone Access network (AN) or telephone exchange (Local Digital Switch, LDS) on one side, and forms a local exchange (LE) on the other, which is connected to "plain old telephone service" (POTS... |
https://en.wikipedia.org/wiki/Dobi%C5%84ski%27s%20formula | In combinatorial mathematics, Dobiński's formula states that the n-th Bell number Bn (i.e., the number of partitions of a set of size n) equals
where denotes Euler's number.
The formula is named after G. Dobiński, who published it in 1877.
Probabilistic content
In the setting of probability theory, Dobiński's formu... |
https://en.wikipedia.org/wiki/G.%20Harry%20Stine | George Harry Stine (March 26, 1928 – November 2, 1997) was one of the founding figures of model rocketry, a science and technology writer, and (under the name Lee Correy) a science fiction author.
Education and early career
Stine grew up in Colorado Springs and attended New Mexico Military Institute and Colorado Colle... |
https://en.wikipedia.org/wiki/Reaching%20definition | In compiler theory, a reaching definition for a given instruction is an earlier instruction whose target variable can reach (be assigned to) the given one without an intervening assignment. For example, in the following code:
d1 : y := 3
d2 : x := y
d1 is a reaching definition for d2. In the following, example, how... |
https://en.wikipedia.org/wiki/Radio%20jamming | Radio jamming is the deliberate blocking of or interference with wireless communications. In some cases, jammers work by the transmission of radio signals that disrupt telecommunications by decreasing the signal-to-noise ratio.
The concept can be used in wireless data networks to disrupt information flow. It is a comm... |
https://en.wikipedia.org/wiki/Slutsky%20equation | The Slutsky equation (or Slutsky identity) in economics, named after Eugen Slutsky, relates changes in Marshallian (uncompensated) demand to changes in Hicksian (compensated) demand, which is known as such since it compensates to maintain a fixed level of utility.
There are two parts of the Slutsky equation, namely t... |
https://en.wikipedia.org/wiki/KMYS | KMYS (channel 35) is a television station licensed to Kerrville, Texas, United States, serving the San Antonio area as an affiliate of the digital multicast network Dabl. It is owned by Deerfield Media, which maintains joint sales and shared services agreements (JSA/SSA) with Sinclair Broadcast Group, owner of dual NBC... |
https://en.wikipedia.org/wiki/Radeon%20R200%20series | The R200 is the second generation of GPUs used in Radeon graphics cards and developed by ATI Technologies. This GPU features 3D acceleration based upon Microsoft Direct3D 8.1 and OpenGL 1.3, a major improvement in features and performance compared to the preceding Radeon R100 design. The GPU also includes 2D GUI accele... |
https://en.wikipedia.org/wiki/Video%20game%20bot | In video games, a bot is a type of artificial intelligence (AI)–based expert system software that plays a video game in the place of a human. Bots are used in a variety of video game genres for a variety of tasks: a bot written for a first-person shooter (FPS) works very differently from one written for a massively mul... |
https://en.wikipedia.org/wiki/Irresistible%20force%20paradox | The irresistible force paradox (also unstoppable force paradox or shield and spear paradox), is a classic paradox formulated as "What happens when an unstoppable force meets an immovable object?" The immovable object and the unstoppable force are both implicitly assumed to be indestructible, or else the question would ... |
https://en.wikipedia.org/wiki/Electrostatic%20precipitator | An electrostatic precipitator (ESP) is a filterless device that removes fine particles, such as dust and smoke, from a flowing gas using the force of an induced electrostatic charge minimally impeding the flow of gases through the unit.
In contrast to wet scrubbers, which apply energy directly to the flowing fluid med... |
https://en.wikipedia.org/wiki/Complete%20Boolean%20algebra | In mathematics, a complete Boolean algebra is a Boolean algebra in which every subset has a supremum (least upper bound). Complete Boolean algebras are used to construct Boolean-valued models of set theory in the theory of forcing. Every Boolean algebra A has an essentially unique completion, which is a complete Bool... |
https://en.wikipedia.org/wiki/Solomon%20Marcus | Solomon Marcus (; 1 March 1925 – 17 March 2016) was a Romanian mathematician, member of the Mathematical Section of the Romanian Academy (full member from 2001) and emeritus professor of the University of Bucharest's Faculty of Mathematics.
His main research was in the fields of mathematical analysis, mathematical and... |
https://en.wikipedia.org/wiki/Biodistribution | Biodistribution is a method of tracking where compounds of interest travel in an experimental animal or human subject. For example, in the development of new compounds for PET (positron emission tomography) scanning, a radioactive isotope is chemically joined with a peptide (subunit of a protein). This particular cla... |
https://en.wikipedia.org/wiki/Conservative%20extension | In mathematical logic, a conservative extension is a supertheory of a theory which is often convenient for proving theorems, but proves no new theorems about the language of the original theory. Similarly, a non-conservative extension is a supertheory which is not conservative, and can prove more theorems than the orig... |
https://en.wikipedia.org/wiki/United%20Devices | United Devices, Inc. was a privately held, commercial volunteer computing company that focused on the use of grid computing to manage high-performance computing systems and enterprise cluster management. Its products and services allowed users to "allocate workloads to computers and devices throughout enterprises, agg... |
https://en.wikipedia.org/wiki/Social%20grooming | Social grooming is a behavior in which social animals, including humans, clean or maintain one another's body or appearance. A related term, allogrooming, indicates social grooming between members of the same species. Grooming is a major social activity, and a means by which animals who live in close proximity may bon... |
https://en.wikipedia.org/wiki/Power%20closed | In mathematics a p-group is called power closed if for every section of the product of powers is again a th power.
Regular p-groups are an example of power closed groups. On the other hand, powerful p-groups, for which the product of powers is again a th power are not power closed, as this property does not hold ... |
https://en.wikipedia.org/wiki/Right%20circular%20cylinder | A right circular cylinder is a cylinder whose generatrices are perpendicular to the bases. Thus, in a right circular cylinder, the generatrix and the height have the same measurements. It is also less often called a cylinder of revolution, because it can be obtained by rotating a rectangle of sides and around one of ... |
https://en.wikipedia.org/wiki/Prosthaphaeresis | Prosthaphaeresis (from the Greek προσθαφαίρεσις) was an algorithm used in the late 16th century and early 17th century for approximate multiplication and division using formulas from trigonometry. For the 25 years preceding the invention of the logarithm in 1614, it was the only known generally applicable way of approx... |
https://en.wikipedia.org/wiki/Gaussian%20blur | In image processing, a Gaussian blur (also known as Gaussian smoothing) is the result of blurring an image by a Gaussian function (named after mathematician and scientist Carl Friedrich Gauss).
It is a widely used effect in graphics software, typically to reduce image noise and reduce detail. The visual effect of th... |
https://en.wikipedia.org/wiki/Software%20quality%20assurance | Software quality assurance (SQA) is a means and practice of monitoring all software engineering processes, methods, and work products to ensure compliance against defined standards. It may include ensuring conformance to standards or models, such as ISO/IEC 9126 (now superseded by ISO 25010), SPICE or CMMI.
It include... |
https://en.wikipedia.org/wiki/Crank%E2%80%93Nicolson%20method | In numerical analysis, the Crank–Nicolson method is a finite difference method used for numerically solving the heat equation and similar partial differential equations. It is a second-order method in time. It is implicit in time, can be written as an implicit Runge–Kutta method, and it is numerically stable. The metho... |
https://en.wikipedia.org/wiki/Photuris%20%28protocol%29 | In computer networking, Photuris is a session key management protocol defined in RFC 2522.
Photuris is the Latin name of a genus of fireflies native to North America that mimic the signals of other firefly species. The name was chosen as a reference to the (classified) FIREFLY key exchange protocol developed by the Na... |
https://en.wikipedia.org/wiki/Luminous%20efficacy | Luminous efficacy is a measure of how well a light source produces visible light. It is the ratio of luminous flux to power, measured in lumens per watt in the International System of Units (SI). Depending on context, the power can be either the radiant flux of the source's output, or it can be the total power (electri... |
https://en.wikipedia.org/wiki/Linnean%20Medal | The Linnean Medal of the Linnean Society of London was established in 1888, and is awarded annually to alternately a botanist or a zoologist or (as has been common since 1958) to one of each in the same year. The medal was of gold until 1976, and is for the preceding years often referred to as "the Gold Medal of the Li... |
https://en.wikipedia.org/wiki/Video%20astronomy | Video astronomy (aka - Camera Assisted Astronomy, aka electronically-assisted astronomy or "EAA") is a branch of astronomy for near real-time observing of relatively faint astronomical objects using very sensitive CCD or CMOS cameras. Unlike lucky imaging, video astronomy does not discard unwanted frames, and image cor... |
https://en.wikipedia.org/wiki/Freeze%20%28software%20engineering%29 | In software engineering, a freeze is a point in time in the development process after which the rules for making changes to the source code or related resources become more strict, or the period during which those rules are applied. A freeze helps move the project forward towards a release or the end of an iteration by... |
https://en.wikipedia.org/wiki/Exponential%20dichotomy | In the mathematical theory of dynamical systems, an exponential dichotomy is a property of an equilibrium point that extends the idea of hyperbolicity to non-autonomous systems.
Definition
If
is a linear non-autonomous dynamical system in Rn with fundamental solution matrix Φ(t), Φ(0) = I, then the equilibrium point ... |
https://en.wikipedia.org/wiki/Locally%20compact%20quantum%20group | In mathematics and theoretical physics, a locally compact quantum group is a relatively new C*-algebraic approach toward quantum groups that generalizes the Kac algebra, compact-quantum-group and Hopf-algebra approaches. Earlier attempts at a unifying definition of quantum groups using, for example, multiplicative unit... |
https://en.wikipedia.org/wiki/Disk%20encryption%20software | Disk encryption software is computer security software that protects the confidentiality of data stored on computer media (e.g., a hard disk, floppy disk, or USB device) by using disk encryption.
Compared to access controls commonly enforced by an operating system (OS), encryption passively protects data confidentiali... |
https://en.wikipedia.org/wiki/616%20%28number%29 | 616 (six hundred [and] sixteen) is the natural number following 615 and preceding 617.
While 666 is called the "number of the beast" in most manuscripts of Revelation , a fragment of the earliest papyrus 115 gives the number as 616.
In mathematics
616 is a member of the Padovan sequence, coming after 265, 351, 465 (i... |
https://en.wikipedia.org/wiki/Variable-frequency%20drive | A variable-frequency drive (VFD, or adjustable-frequency drives, adjustable-speed drives, variable-speed drives, AC drives, micro drives, inverter drives, or drives) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the input electricity. Depending on ... |
https://en.wikipedia.org/wiki/Personal%20data | Personal data, also known as personal information or personally identifiable information (PII), is any information related to an identifiable person.
The abbreviation PII is widely accepted in the United States, but the phrase it abbreviates has four common variants based on personal or personally, and identifiable or... |
https://en.wikipedia.org/wiki/Supramolecular%20assembly | In chemistry, a supramolecular assembly is a complex of molecules held together by noncovalent bonds. While a supramolecular assembly can be simply composed of two molecules (e.g., a DNA double helix or an inclusion compound), or a defined number of stoichiometrically interacting molecules within a quaternary complex, ... |
https://en.wikipedia.org/wiki/Air%E2%80%93fuel%20ratio | Air–fuel ratio (AFR) is the mass ratio of air to a solid, liquid, or gaseous fuel present in a combustion process. The combustion may take place in a controlled manner such as in an internal combustion engine or industrial furnace, or may result in an explosion (e.g., a dust explosion, gas or vapor explosion or in a t... |
https://en.wikipedia.org/wiki/Password%20Safe | Password Safe is a free and open-source password manager program originally written for Microsoft Windows but supporting wide area of operating systems with compatible clients available for Linux, FreeBSD, Android, IOS, BlackBerry and other operating systems as well.
The Linux version is available for Ubuntu (includin... |
https://en.wikipedia.org/wiki/International%20Celestial%20Reference%20System%20and%20its%20realizations | The International Celestial Reference System (ICRS) is the current standard celestial reference system adopted by the International Astronomical Union (IAU). Its origin is at the barycenter of the Solar System, with axes that are intended to "show no global rotation with respect to a set of distant extragalactic object... |
https://en.wikipedia.org/wiki/Catastrophe%20modeling | Catastrophe modeling (also known as cat modeling) is the process of using computer-assisted calculations to estimate the losses that could be sustained due to a catastrophic event such as a hurricane or earthquake. Cat modeling is especially applicable to analyzing risks in the insurance industry and is at the conflue... |
https://en.wikipedia.org/wiki/Hoarding%20%28animal%20behavior%29 | Hoarding or caching in animal behavior is the storage of food in locations hidden from the sight of both conspecifics (animals of the same or closely related species) and members of other species. Most commonly, the function of hoarding or caching is to store food in times of surplus for times when food is less plentif... |
https://en.wikipedia.org/wiki/Language%20module | The language module or language faculty is a hypothetical structure in the human brain which is thought to contain innate capacities for language, originally posited by Noam Chomsky. There is ongoing research into brain modularity in the fields of cognitive science and neuroscience, although the current idea is much we... |
https://en.wikipedia.org/wiki/Esky | Esky is a brand of portable coolers, originally Australian, derived from the word "Eskimo". The term "esky" is also commonly used in Australia to generically refer to portable coolers or ice boxes and is part of the Australian vernacular, in place of words like "cooler" or "cooler box" and the New Zealand "chilly bin".... |
https://en.wikipedia.org/wiki/Medical%20oddity | A medical oddity is an unusual predicament or event which takes place in a medical context. Some examples of medical oddities might include: "lost and found" surgical instruments (in the body), grotesquely oversized tumors, (human) male pregnancy, rare or "orphan" illnesses, rare allergies (such as to water), strange ... |
https://en.wikipedia.org/wiki/Airline%20teletype%20system | The airline teletype system uses teleprinters, which are electro-mechanical typewriters that can communicate typed messages from point to point through simple electric communications channels, often just pairs of wires. The most modern form of these devices are fully electronic and use a screen, instead of a printer.
... |
https://en.wikipedia.org/wiki/Cryptographically%20Generated%20Address | A Cryptographically Generated Address (CGA) is an Internet Protocol Version 6 (IPv6) address that has a host identifier computed from a cryptographic hash function. This procedure is a method for binding a public signature key to an IPv6 address in the Secure Neighbor Discovery Protocol (SEND).
Characteristics
A Crypt... |
https://en.wikipedia.org/wiki/Secure%20Neighbor%20Discovery | The Secure Neighbor Discovery (SEND) protocol is a security extension of the Neighbor Discovery Protocol (NDP) in IPv6 defined in RFC 3971 and updated by RFC 6494.
The Neighbor Discovery Protocol (NDP) is responsible in IPv6 for discovery of other network nodes on the local link, to determine the link layer addresses ... |
https://en.wikipedia.org/wiki/Paper%20craft | Paper craft is a collection of crafts using paper or card as the primary artistic medium for the creation of two or three-dimensional objects. Paper and card stock lend themselves to a wide range of techniques and can be folded, curved, bent, cut, glued, molded, stitched, or layered. Papermaking by hand is also a pape... |
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