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Second-order Jahn-Teller distortion (commonly known as pseudo Jahn-Teller distortion) is a singular, general, and powerful approach rigorously based in first-principle vibronic coupling interactions. It enables prediction and explication of molecular geometries that are not necessarily satisfactorily or even correctly ... | https://en.wikipedia.org/wiki/Second-order_Jahn-Teller_distortion_in_main-group_element_compounds |
In mathematical logic , second-order arithmetic is a collection of axiomatic systems that formalize the natural numbers and their subsets . It is an alternative to axiomatic set theory as a foundation for much, but not all, of mathematics.
A precursor to second-order arithmetic that involves third-order parameters was... | https://en.wikipedia.org/wiki/Second-order_arithmetic |
In logic and mathematics , second-order logic is an extension of first-order logic , which itself is an extension of propositional logic . [ a ] Second-order logic is in turn extended by higher-order logic and type theory .
First-order logic quantifies only variables that range over individuals (elements of the domain... | https://en.wikipedia.org/wiki/Second-order_logic |
In applied mathematics, the Johnson bound (named after Selmer Martin Johnson ) is a limit on the size of error-correcting codes , as used in coding theory for data transmission or communications.
Let C {\displaystyle C} be a q -ary code of length n {\displaystyle n} , i.e. a subset of F q n {\displaystyle \mathbb {F} ... | https://en.wikipedia.org/wiki/Second_Johnson_bound |
Second Reality (originally titled Unreal ] [ - The 2nd Reality ) is an IBM PC compatible demo created by the Finnish demogroup Future Crew . It debuted at the Assembly 1993 demoparty on July 30, 1993, [ 1 ] where it was entered into the PC demo competition , and finished in first place with its demonstration of 2D and ... | https://en.wikipedia.org/wiki/Second_Reality |
The second battle of Tembien was fought on the northern front of the Second Italo-Ethiopian War . This battle consisted of attacks by Italian forces under Marshal Pietro Badoglio on Ethiopian forces under Ras [ nb 1 ] Kassa Haile Darge and Ras Seyoum Mangasha . This battle, which resulted in a decisive defeat of Ethiop... | https://en.wikipedia.org/wiki/Second_battle_of_Tembien |
In calculus , the second derivative , or the second-order derivative , of a function f is the derivative of the derivative of f . Informally, the second derivative can be phrased as "the rate of change of the rate of change"; for example, the second derivative of the position of an object with respect to time is the in... | https://en.wikipedia.org/wiki/Second_derivative |
In differential geometry , the second fundamental form (or shape tensor ) is a quadratic form on the tangent plane of a smooth surface in the three-dimensional Euclidean space , usually denoted by I I {\displaystyle \mathrm {I\!I} } (read "two"). Together with the first fundamental form , it serves to define extrinsic ... | https://en.wikipedia.org/wiki/Second_fundamental_form |
The second law of thermodynamics is a physical law based on universal empirical observation concerning heat and energy interconversions . A simple statement of the law is that heat always flows spontaneously from hotter to colder regions of matter (or 'downhill' in terms of the temperature gradient). Another statement ... | https://en.wikipedia.org/wiki/Second_law_of_thermodynamics |
In mathematics, the second moment method is a technique used in probability theory and analysis to show that a random variable has positive probability of being positive. More generally, the "moment method" consists of bounding the probability that a random variable fluctuates far from its mean, by using its moments. [... | https://en.wikipedia.org/wiki/Second_moment_method |
The second moment of area , or second area moment , or quadratic moment of area and also known as the area moment of inertia , is a geometrical property of an area which reflects how its points are distributed with regard to an arbitrary axis. The second moment of area is typically denoted with either an I {\displaysty... | https://en.wikipedia.org/wiki/Second_moment_of_area |
The second solar spectrum is an electromagnetic spectrum of the Sun that shows the degree of linear polarization . The term was coined by V. V. Ivanov in 1991. The polarization is at a maximum close to the limb (edge) of the Sun, thus the best place to observe such a spectrum is from just inside the limb. [ 1 ] It is a... | https://en.wikipedia.org/wiki/Second_solar_spectrum |
In condensed matter physics , second sound is a quantum mechanical phenomenon in which heat transfer occurs by wave -like motion, rather than by the more usual mechanism of diffusion . Its presence leads to a very high thermal conductivity . It is known as "second sound" because the wave motion of entropy and temperatu... | https://en.wikipedia.org/wiki/Second_sound |
Second wind is a phenomenon in endurance sports, such as marathons or road running (as well as other sports), whereby an athlete who is out of breath and too tired to continue (known as " hitting the wall "), finds the strength to press on at top performance with less exertion. The feeling may be similar to that of a "... | https://en.wikipedia.org/wiki/Second_wind |
Secondary is a term used in organic chemistry to classify various types of compounds (e. g. alcohols, alkyl halides, amines) or reactive intermediates (e. g. alkyl radicals, carbocations). An atom is considered secondary if it has two 'R' Groups attached to it. [ 1 ] An 'R' group is a carbon containing group such as a ... | https://en.wikipedia.org/wiki/Secondary_(chemistry) |
A secondary carbon is a carbon atom bound to two other carbon atoms and has sp3 hybridization. [ 1 ] For this reason, secondary carbon atoms are found in almost (neopentane, for example, does not have any secondary carbon atoms) all hydrocarbons having at least three carbon atoms. In unbranched alkanes , the inner carb... | https://en.wikipedia.org/wiki/Secondary_carbon |
The secondary cell wall is a structure found in many plant cells , located between the primary cell wall and the plasma membrane . The cell starts producing the secondary cell wall after the primary cell wall is complete and the cell has stopped expanding. [ 1 ] It is most prevalent in the Ground tissue found in vascul... | https://en.wikipedia.org/wiki/Secondary_cell_wall |
Secondary contact is the process in which two allopatrically distributed populations of a species are geographically reunited. This contact allows for the potential for the exchange of genes, dependent on how reproductively isolated the two populations have become. There are several primary outcomes of secondary contac... | https://en.wikipedia.org/wiki/Secondary_contact |
Secondary electrons are electrons generated as ionization products. They are called 'secondary' because they are generated by other radiation (the primary radiation). This radiation can be in the form of ions , electrons, or photons with sufficiently high energy, i.e. exceeding the ionization potential . Photoelectrons... | https://en.wikipedia.org/wiki/Secondary_electrons |
In particle physics , secondary emission is a phenomenon where primary incident particles of sufficient energy , when hitting a surface or passing through some material, induce the emission of secondary particles. The term often refers to the emission of electrons when charged particles like electrons or ions in a vac... | https://en.wikipedia.org/wiki/Secondary_emission |
In fluid dynamics , flow can be decomposed into primary flow plus secondary flow , a relatively weaker flow pattern superimposed on the stronger primary flow pattern. The primary flow is often chosen to be an exact solution to simplified or approximated governing equations, such as potential flow around a wing or geost... | https://en.wikipedia.org/wiki/Secondary_flow |
Secondary metabolites , also called specialised metabolites , secondary products , or natural products , are organic compounds produced by any lifeform, e.g. bacteria , archaea , fungi , animals , or plants , which are not directly involved in the normal growth , development , or reproduction of the organism. Instead, ... | https://en.wikipedia.org/wiki/Secondary_metabolite |
Secondary poisoning , or relay toxicity , is the poisoning that results when one organism comes into contact with or ingests another organism that has poison in its system. It typically occurs when a predator eats an animal, such as a mouse , rat , or insect , that has previously been poisoned by a commercial pesticid... | https://en.wikipedia.org/wiki/Secondary_poisoning |
In mathematics , the secondary polynomials { q n ( x ) } {\displaystyle \{q_{n}(x)\}} associated with a sequence { p n ( x ) } {\displaystyle \{p_{n}(x)\}} of polynomials orthogonal with respect to a density ρ ( x ) {\displaystyle \rho (x)} are defined by
To see that the functions q n ( x ) {\displaystyle q_{n}(x)} ar... | https://en.wikipedia.org/wiki/Secondary_polynomials |
Secondary spill containment is the containment of hazardous liquids in order to prevent pollution of soil and water . Common techniques include the use of spill berms to contain oil -filled equipment, fuel tanks , truck washing decks, or any other places or items that may leak hazardous liquids.
Secondary spill contai... | https://en.wikipedia.org/wiki/Secondary_spill_containment |
Secondary stability , also known as reserve stability , is a boat or ship's ability to right itself at large angles of heel (lateral tilt), as opposed to primary or initial stability , the boat's tendency to stay laterally upright when tilted to low (<10°) angles. [ 1 ]
The study of initial and secondary stability are... | https://en.wikipedia.org/wiki/Secondary_stability |
Secondary treatment (mostly biological wastewater treatment ) is the removal of biodegradable organic matter (in solution or suspension) from sewage or similar kinds of wastewater . [ 1 ] : 11 The aim is to achieve a certain degree of effluent quality in a sewage treatment plant suitable for the intended disposal or re... | https://en.wikipedia.org/wiki/Secondary_treatment |
In mathematics , particularly differential topology , the secondary vector bundle structure refers to the natural vector bundle structure ( TE , p ∗ , TM ) on the total space TE of the tangent bundle of a smooth vector bundle ( E , p , M ) , induced by the push-forward p ∗ : TE → TM of the original projection map p : E... | https://en.wikipedia.org/wiki/Secondary_vector_bundle_structure |
Secotioid fungi produce an intermediate fruiting body form that is between the mushroom-like hymenomycetes and the closed bag-shaped gasteromycetes , where an evolutionary process of gasteromycetation has started but not run to completion. Secotioid fungi may or may not have opening caps, but in any case they often la... | https://en.wikipedia.org/wiki/Secotioid |
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Secreted frizzled-related protein 1 , also known as SFRP1 , is a protein which in humans is encoded by the SFRP1 gene . [ 5 ]
Secreted frizzled-related protein 1 (SFRP1) is a member of the SFRP family that con... | https://en.wikipedia.org/wiki/Secreted_frizzled-related_protein_1 |
Secretion is the movement of material from one point to another, such as a secreted chemical substance from a cell or gland . In contrast, excretion is the removal of certain substances or waste products from a cell or organism. The classical mechanism of cell secretion is via secretory portals at the plasma membrane c... | https://en.wikipedia.org/wiki/Secretion |
A secretory protein is any protein, whether it be endocrine or exocrine , which is secreted by a cell. Secretory proteins include many hormones , enzymes , toxins , and antimicrobial peptides . Secretory proteins are synthesized in the endoplasmic reticulum. [ 1 ]
The production of a secretory protein starts like any ... | https://en.wikipedia.org/wiki/Secretory_protein |
Section Beams are made of steel and they have a specific lengths and shapes like Ɪ-beam , 'L', C-channel and I flanged beam. These types of section are usually used in steel structures and it is common to connect them with plates of steel.
There are three connection types:
Rivets are the strongest and most common ty... | https://en.wikipedia.org/wiki/Section_beam |
A sectional cooler is a type of liquid cooled rotary drum cooler used for continuous processes in chemical engineering . [ 1 ] Sectional coolers consist of a rotating cylinder ("drum" or "shell"), a drive unit and a support structure. At each end of the drum there are stationary chutes for material feed and outlet. Dep... | https://en.wikipedia.org/wiki/Sectional_cooler |
A sector instrument is a general term for a class of mass spectrometer that uses a static electric (E) or magnetic (B) sector or some combination of the two (separately in space) as a mass analyzer. [ 1 ] Popular combinations of these sectors have been the EB, BE (of so-called reverse geometry), three-sector BEB and fo... | https://en.wikipedia.org/wiki/Sector_mass_spectrometer |
Secular Review (1876–1907) was a freethought / secularist weekly publication in nineteenth and early twentieth-century Britain that appeared under a variety of names. It represented a "relatively moderate style of Secularism," more open to old Owenite and new socialist influences in contrast to the individualism and s... | https://en.wikipedia.org/wiki/Secular_Review |
Secular Thought (1887–1911) was a Canadian periodical , published in Toronto , dedicated to promoting the principles of freethought and secularism . Founded and edited during its first several years by English freethinker Charles Watts , the editorship was assumed by Toronto printer and publisher James Spencer Ellis in... | https://en.wikipedia.org/wiki/Secular_Thought |
In nuclear physics , secular equilibrium is a situation in which the quantity of a radioactive isotope remains constant because its production rate (e.g., due to decay of a parent isotope) is equal to its decay rate.
Secular equilibrium can occur in a radioactive decay chain only if the half-life of the daughter radio... | https://en.wikipedia.org/wiki/Secular_equilibrium |
SecureEasySetup , or SES is a proprietary technology developed by Broadcom to easily set up wireless LANs with Wi-Fi Protected Access . A user presses a button on the wireless access point , then a button on the device to be set up (printer, etc.) and the wireless network is automatically set up.
This technology has b... | https://en.wikipedia.org/wiki/SecureEasySetup |
In computer science , secure transmission refers to the transfer of data such as confidential or proprietary information over a secure channel . Many secure transmission methods require a type of encryption . The most common email encryption is called PKI . In order to open the encrypted file, an exchange of key is don... | https://en.wikipedia.org/wiki/Secure_transmission |
Securin is a protein involved in control of the metaphase-anaphase transition and anaphase onset. Following bi-orientation of chromosome pairs and inactivation of the spindle checkpoint system, the underlying regulatory system, which includes securin, produces an abrupt stimulus that induces highly synchronous chromoso... | https://en.wikipedia.org/wiki/Securin |
SecurityFocus was an online computer security news portal and purveyor of information security services. Home to the well-known Bugtraq mailing list, SecurityFocus columnists and writers included former Department of Justice cybercrime prosecutor Mark Rasch , and hacker-turned-journalist Kevin Poulsen . [ 1 ]
This art... | https://en.wikipedia.org/wiki/SecurityFocus |
A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary ( theft ) or property damage , as well as against intruders. Examples include personal systems, neighborhood security alerts, car ala... | https://en.wikipedia.org/wiki/Security_alarm |
The iOS operating system utilizes many security features in both hardware and software . These include a secure boot chain, biometric authentication ( Face ID and Touch ID ), data encryption, app sandboxing, and the Secure Enclave—a dedicated coprocessor for sensitive data. iOS also employs memory protection techniques... | https://en.wikipedia.org/wiki/Security_and_privacy_of_iOS |
In telecommunications , the term security kernel has the following meanings: | https://en.wikipedia.org/wiki/Security_kernel |
A security log is used to track security-related information on a computer system. Examples include:
According to Stefan Axelsson, "Most UNIX installations do not run any form of security logging software, mainly because the security logging facilities are expensive in terms of disk storage, processing time, and the c... | https://en.wikipedia.org/wiki/Security_log |
The Java software platform provides a number of features designed for improving the security of Java applications. This includes enforcing runtime constraints through the use of the Java Virtual Machine (JVM), a security manager that sandboxes untrusted code from the rest of the operating system, and a suite of securit... | https://en.wikipedia.org/wiki/Security_of_the_Java_software_platform |
Securus Inc. , was a Cary , North Carolina –based provider of GPS tracking and personal emergency response technology. [ 1 ]
The company was founded in 2008 as Positioning Animals Worldwide Inc. [ 2 ] [ 3 ] [ 4 ] [ 5 ] and launched SpotLight and SpotLite GPS pet locator in collaboration with American Kennel Club Compa... | https://en.wikipedia.org/wiki/Securus,_Inc. |
SedDB is an online database for sediment geochemistry .
SedDB is based on a relational database that contains the full range of analytical values for sediment samples, primarily from marine sediment cores, including major and trace element concentrations, radiogenic and stable isotope ratios, and data for all types of... | https://en.wikipedia.org/wiki/SedDB |
Sedaxane is a broad spectrum fungicide used as a seed treatment in agriculture to protect crops from fungal diseases. It was first marketed by Syngenta in 2011 using their brand name Vibrance . The compound is an amide which combines a pyrazole acid with an aryl amine to give an inhibitor of succinate dehydrogenase . [... | https://en.wikipedia.org/wiki/Sedaxane |
Sediment is a solid material that is transported to a new location where it is deposited. [ 1 ] It occurs naturally and, through the processes of weathering and erosion , is broken down and subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles. For example, san... | https://en.wikipedia.org/wiki/Sediment |
A sediment basin is a temporary pond built on a construction site to capture eroded or disturbed soil that is washed off during rain storms, and protect the water quality of a nearby stream, river, lake, or bay. The sediment -laden soil settles in the pond before the runoff is discharged. Sediment basins are typicall... | https://en.wikipedia.org/wiki/Sediment_basin |
A sediment control is a practice or device designed to keep eroded soil on a construction site, so that it does not wash off and cause water pollution to a nearby stream, river, lake, or sea. Sediment controls are usually employed together with erosion controls , which are designed to prevent or minimize erosion and th... | https://en.wikipedia.org/wiki/Sediment_control |
In aquatic toxicology , the sediment quality triad (SQT) approach has been used as an assessment tool to evaluate the extent of sediment degradation resulting from contaminants released due to human activity present in aquatic environments (Chapman, 1990). [ 1 ] This evaluation focuses on three main components: 1.) sed... | https://en.wikipedia.org/wiki/Sediment_quality_triad |
Sediment transport is the movement of solid particles ( sediment ), typically due to a combination of gravity acting on the sediment, and the movement of the fluid in which the sediment is entrained. Sediment transport occurs in natural systems where the particles are clastic rocks ( sand , gravel , boulders , etc.), m... | https://en.wikipedia.org/wiki/Sediment_transport |
Sedimentation is the deposition of sediments . [ 1 ] It takes place when particles in suspension settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the forces acting on them: these forces can be due to gravity , centrifuga... | https://en.wikipedia.org/wiki/Sedimentation |
The physical process of sedimentation (the act of depositing sediment ) has applications in water treatment , whereby gravity acts to remove suspended solids from water. [ 1 ] Solid particles entrained by the turbulence of moving water may be removed naturally by sedimentation in the still water of lakes and oceans. Se... | https://en.wikipedia.org/wiki/Sedimentation_(water_treatment) |
In chemistry , the sedimentation coefficient ( s ) of a particle characterizes its sedimentation (tendency to settle out of suspension ) during centrifugation . It is defined as the ratio of a particle's sedimentation velocity to the applied acceleration causing the sedimentation. [ 1 ] s = v t a {\displaystyle s={\fra... | https://en.wikipedia.org/wiki/Sedimentation_coefficient |
Sedimentation equilibrium in a suspension of different particles, such as molecules , exists when the rate of transport of each material in any one direction due to sedimentation equals the rate of transport in the opposite direction due to diffusion . Sedimentation is due to an external force, such as gravity or centr... | https://en.wikipedia.org/wiki/Sedimentation_equilibrium |
Sedimentation potential occurs when dispersed particles move under the influence of either gravity or centrifugation or electricity in a medium. This motion disrupts the equilibrium symmetry of the particle's double layer . While the particle moves, the ions in the electric double layer lag behind due to the liquid flo... | https://en.wikipedia.org/wiki/Sedimentation_potential |
A sednoid is a trans-Neptunian object with a large semi-major axis and a high perihelion , similar to the orbit of the dwarf planet Sedna . The consensus among astronomers is that there are only four objects that are known from this population: Sedna, 2012 VP 113 , 541132 Leleākūhonua ( 2015 TG 387 ), and 2023 KQ 14 [ ... | https://en.wikipedia.org/wiki/Sednoid |
Sedoheptulose-bisphosphatase (also sedoheptulose-1,7-bisphosphatase or SBPase , EC number 3.1.3.37; systematic name sedoheptulose-1,7-bisphosphate 1-phosphohydrolase ) is an enzyme that catalyzes the removal of a phosphate group from sedoheptulose 1,7-bisphosphate to produce sedoheptulose 7-phosphate . SBPase is an exa... | https://en.wikipedia.org/wiki/Sedoheptulose-bisphosphatase |
Sedoheptulose 7-phosphate is an intermediate in the pentose phosphate pathway . [ 1 ]
It is formed by transketolase and acted upon by transaldolase .
Sedoheptulokinase is an enzyme that uses sedoheptulose and ATP to produce ADP and sedoheptulose 7-phosphate.
Sedoheptulose-bisphosphatase is an enzyme that uses sedohe... | https://en.wikipedia.org/wiki/Sedoheptulose_7-phosphate |
Mass spectrometry is a scientific technique for measuring the mass-to-charge ratio of ions. It is often coupled to chromatographic techniques such as gas- or liquid chromatography and has found widespread adoption in the fields of analytical chemistry and biochemistry where it can be used to identify and characterize s... | https://en.wikipedia.org/wiki/SeeMS |
Seeblatt ( [ˈzeː.blat] , German for 'lake leaf', plural Seeblätter ; Danish : søblad ; West Frisian : pompeblêd ; East Frisian: Pupkeblad) is the term for the stylized leaf of a water lily , used as a charge in heraldry. [ 1 ]
This charge is used in the heraldry of Germany, the Netherlands and Scandinavia, but not so ... | https://en.wikipedia.org/wiki/Seeblatt |
Seed counting machines count seeds for research and packaging purposes. The machines typically provide total counts of seeds or batch sizes for packaging.
The first seed counters were developed to count legumes and other seeds which were large. [ 1 ]
Traditionally, the seed packaging industry packed seeds by weight b... | https://en.wikipedia.org/wiki/Seed-counting_machine |
Seed balls , also known as earth balls or nendo dango ( Japanese : 粘土団子 ) , consist of seeds rolled within a ball of clay and other matter to assist germination. They are then thrown into vacant lots and over fences as a form of guerilla gardening . Matter such as humus and compost are often placed around the seeds to... | https://en.wikipedia.org/wiki/Seed_ball |
Seed blanking is a plant disease injury causing the seed producing anatomy to contain no seeds despite otherwise normal development. This term is used to contrast with other causes of seed production failure, including but not limited to earlier or more widespread damage to the plant. [ 1 ] [ 2 ] [ 3 ] For one example,... | https://en.wikipedia.org/wiki/Seed_blanking |
In spermatophyte plants, seed dispersal is the movement, spread or transport of seeds away from the parent plant. [ 1 ] Plants have limited mobility and rely upon a variety of dispersal vectors to transport their seeds, including both abiotic vectors, such as the wind, and living ( biotic ) vectors such as birds. Seeds... | https://en.wikipedia.org/wiki/Seed_dispersal |
Seed dispersal syndromes are morphological characters of seeds correlated to particular seed dispersal agents. [ 1 ] [ 2 ] [ 3 ] [ 4 ] Dispersal is the event by which individuals move from the site of their parents to establish in a new area. [ 5 ] A seed disperser is the vector by which a seed moves from its parent to... | https://en.wikipedia.org/wiki/Seed_dispersal_syndrome |
A seed nucleus is an isotope that is the starting point for any of a variety of fusion chain reactions . The mix of nuclei produced at the conclusion of the chain reaction generally depends strongly on the relative availability of the seed nucleus or nuclei and the component being fused—whether neutrons as in the r-pr... | https://en.wikipedia.org/wiki/Seed_nucleus |
A seed plant or spermatophyte ( lit. ' seed plant ' ; New Latin spermat- and Greek φυτόν (phytón)|plant), [ 1 ] also known as a phanerogam (taxon Phanerogamae ) or a phaenogam (taxon Phaenogamae ), is any plant that produces seeds . It is a category of embryophyte (i.e. land plant) that includes most of the familiar la... | https://en.wikipedia.org/wiki/Seed_plant |
Seeding is a fundamental technique in fluid dynamics . It is used to visualize and measure fluid flow. Researchers introduce small particles, called seed particles, into a fluid. These particles move with the fluid. This allows researchers to observe and analyze the fluid's movement under different conditions.
The sig... | https://en.wikipedia.org/wiki/Seeding_(fluid_dynamics) |
Disphenoidal or seesaw (also known as sawhorse [ 1 ] ) is a type of molecular geometry where there are four bonds to a central atom with overall C 2v molecular symmetry . The name "seesaw" comes from the observation that it looks like a playground seesaw . Most commonly, four bonds to a central atom result in tetrahedr... | https://en.wikipedia.org/wiki/Seesaw_molecular_geometry |
Segal's Burnside ring conjecture , or, more briefly, the Segal conjecture , is a theorem in homotopy theory , a branch of mathematics . The theorem relates the Burnside ring of a finite group G to the stable cohomotopy of the classifying space BG . The conjecture was made in the mid 1970s by Graeme Segal and proved in ... | https://en.wikipedia.org/wiki/Segal's_conjecture |
Segmental analysis is a method of anatomical analysis for describing the connective morphology of the human body . Instead of describing anatomy in terms of spatial relativity, as in the anatomical position method, segmental analysis describes anatomy in terms of which organs, tissues, etc. connect to each other, and t... | https://en.wikipedia.org/wiki/Segmental_analysis_(biology) |
Segmentation in biology is the division of some animal and plant body plans into a linear series of repetitive segments that may or may not be interconnected to each other. This article focuses on the segmentation of animal body plans, specifically using the examples of the taxa Arthropoda , Chordata , and Annelida . T... | https://en.wikipedia.org/wiki/Segmentation_(biology) |
Segmented filamentous bacteria or Candidatus Savagella are members of the gut microbiota of rodents, fish and chickens, and have been shown to potently induce immune responses in mice. [ 2 ] They form a distinct lineage within the Clostridiaceae and the name Candidatus Savagella has been proposed for this lineage. [ 1 ... | https://en.wikipedia.org/wiki/Segmented_filamentous_bacteria |
In projective geometry , Segre's theorem , named after the Italian mathematician Beniamino Segre , is the statement:
This statement was assumed 1949 by the two Finnish mathematicians G. Järnefelt and P. Kustaanheimo and its proof was published in 1955 by B. Segre.
A finite pappian projective plane can be imagined as ... | https://en.wikipedia.org/wiki/Segre's_theorem |
The Segre classification is an algebraic classification of rank two symmetric tensors . It was proposed by the italian mathematician Corrado Segre in 1884.
The resulting types are then known as Segre types . It is most commonly applied to the energy–momentum tensor (or the Ricci tensor ) and primarily finds applicatio... | https://en.wikipedia.org/wiki/Segre_classification |
In taxonomy , a segregate , or a segregate taxon is created when a taxon is split off from another taxon. This other taxon will be better known, usually bigger, and will continue to exist, even after the segregate taxon has been split off. A segregate will be either new or ephemeral: there is a tendency for taxonomists... | https://en.wikipedia.org/wiki/Segregate_(taxonomy) |
The Segregated Runge–Kutta (SRK) method [ 1 ] is a family of IMplicit–EXplicit (IMEX) Runge–Kutta methods [ 2 ] [ 3 ] that were developed to approximate the solution of differential algebraic equations (DAE) of index 2.
The SRK method were motivated as a numerical method for the time integration of the incompressible ... | https://en.wikipedia.org/wiki/Segregated_Runge–Kutta_methods |
In materials science , segregation is the enrichment of atoms, ions, or molecules at a microscopic region in a materials system. While the terms segregation and adsorption are essentially synonymous, in practice, segregation is often used to describe the partitioning of molecular constituents to defects from solid solu... | https://en.wikipedia.org/wiki/Segregation_(materials_science) |
Segrosomes are protein complexes that ensure accurate segregation (partitioning) of plasmids or chromosomes during bacterial cell division .
Just as higher forms of life have evolved a complex mitotic apparatus to partition duplicated DNA during cell division , bacteria require a specialized apparatus to partition the... | https://en.wikipedia.org/wiki/Segrosome |
The Segrè–Silberberg effect is a fluid dynamic separation effect where a dilute suspension of neutrally buoyant particles flowing (in laminar flow ) in a tube equilibrates at a distance of 0.6R from the tube's centre. This effect was first observed by Gino Segrè and Alexander Silberberg. [ 1 ] [ 2 ] The solid particles... | https://en.wikipedia.org/wiki/Segrè–Silberberg_effect |
In quantum field theory , Seiberg duality , conjectured by Nathan Seiberg in 1994, [ 1 ] is an S-duality relating two different supersymmetric QCDs . The two theories are not identical, but they agree at low energies. More precisely under a renormalization group flow they flow to the same IR fixed point , and so are i... | https://en.wikipedia.org/wiki/Seiberg_duality |
In mathematics , in graph theory , the Seidel adjacency matrix of a simple undirected graph G is a symmetric matrix with a row and column for each vertex, having 0 on the diagonal, −1 for positions whose rows and columns correspond to adjacent vertices, and +1 for positions corresponding to non-adjacent vertices.
It is... | https://en.wikipedia.org/wiki/Seidel_adjacency_matrix |
Seidor is a technology consulting firm with headquarters in Barcelona , Spain . It was founded in 1982 in Vic . [ 1 ] By 2024, it has a team of 9,000 people and a direct presence in 45 countries in Europe, the United States, Latin America, the Middle East, Africa and Asia. The Carlyle Group joined Seidor as a major sha... | https://en.wikipedia.org/wiki/Seidor_(company) |
Seiffert's spherical spiral is a curve on a sphere made by moving on the sphere with constant speed and angular velocity with respect to a fixed diameter. If the selected diameter is the line from the north pole to the south pole, then the requirement of constant angular velocity means that the longitude of the moving... | https://en.wikipedia.org/wiki/Seiffert's_spiral |
Seipin is a homo-oligomeric integral membrane protein in the endoplasmic reticulum (ER) that concentrates at junctions with cytoplasmic lipid droplets (LDs). Alternatively, seipin can be referred to as Berardinelli–Seip congenital lipodystrophy type 2 protein (BSCL2), and it is encoded by the corresponding gene of the ... | https://en.wikipedia.org/wiki/Seipin |
In reflection seismology , a seismic attribute is a quantity extracted or derived from seismic data that can be analysed in order to enhance information that might be more subtle in a traditional seismic image, leading to a better geological or geophysical interpretation of the data. [ 1 ] Examples of seismic attribute... | https://en.wikipedia.org/wiki/Seismic_attribute |
Seismic base isolation , also known as base isolation , [ 3 ] or base isolation system , [ 4 ] is one of the most popular means of protecting a structure against earthquake forces. [ 5 ] It is a collection of structural elements which should substantially decouple a superstructure from its substructure that is in turn ... | https://en.wikipedia.org/wiki/Seismic_base_isolation |
A seismic metamaterial , is a metamaterial that is designed to counteract the adverse effects of seismic waves on artificial structures, which exist on or near the surface of the Earth. [ 1 ] [ 2 ] [ 3 ] Current designs of seismic metamaterials utilize configurations of boreholes, [ 4 ] trees [ 5 ] [ 6 ] or proposed un... | https://en.wikipedia.org/wiki/Seismic_metamaterial |
Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity , ground motion , or soil failure due to earthquakes . With better understanding of seismic demand on structures and with recent experiences with large earthquakes near urban centers, the need of seismic retr... | https://en.wikipedia.org/wiki/Seismic_retrofit |
A seismometer is an instrument that responds to ground displacement and shaking such as caused by quakes , volcanic eruptions , and explosions . They are usually combined with a timing device and a recording device to form a seismograph . [ 1 ] The output of such a device—formerly recorded on paper (see picture) or fil... | https://en.wikipedia.org/wiki/Seismometer |
Seita Emori (born 1970 in Kanagawa, Japan ) is a Japanese environmental scientist whose most noted work focuses upon the worldwide effects of Global Warming . [ 1 ] He completed his Doctorate at the University of Tokyo in 1997 and thereafter joined the National Institute for Environmental Studies , where he is currentl... | https://en.wikipedia.org/wiki/Seita_Emori |
Seked (or seqed ) is an ancient Egyptian term describing the inclination of the triangular faces of a right pyramid. [ 1 ] The system was based on the Egyptians' length measure known as the royal cubit . It was subdivided into seven palms , each of which was sub-divided into four digits .
The inclination of measured s... | https://en.wikipedia.org/wiki/Seked |
Sel gris (pl. sels gris , "gray salt" in French ) is a coarse granular sea salt popularized by the French. Sel gris comes from the same solar evaporation salt pans as fleur de sel but is harvested differently; it is allowed to come into contact with the bottom of the salt pan before being raked, hence its gray color. S... | https://en.wikipedia.org/wiki/Sel_gris |
In number theory , Selberg's identity is an approximate identity involving logarithms of primes named after Atle Selberg . The identity, discovered jointly by Selberg and Paul Erdős , was used in the first elementary proof for the prime number theorem .
There are several different but equivalent forms of Selberg's ide... | https://en.wikipedia.org/wiki/Selberg's_identity |
In mathematics, the Selberg conjecture , named after Atle Selberg , is a theorem about the density of zeros of the Riemann zeta function ζ(1/2 + it ). It is known that the function has infinitely many zeroes on this line in the complex plane: the point at issue is how densely they are clustered. Results on this can be ... | https://en.wikipedia.org/wiki/Selberg's_zeta_function_conjecture |
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