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The Sir Hans Krebs Lecture and Medal is awarded annually by the Federation of European Biochemical Societies (FEBS) for outstanding achievements in Biochemistry and Molecular Biology or related sciences.
It was endowed by the Lord Rank Centre for Research and named after the German-born British biochemist Sir Hans Ado... | https://en.wikipedia.org/wiki/Sir_Hans_Krebs_Medal |
Sir John Conroy, 3rd Baronet , FRS (16 August 1845 – 15 December 1900) was an English analytical chemist .
Conroy was born in Kensington , west London , the son of Sir Edward Conroy, 2nd Baronet (1809–1869) and Lady Alicia Conroy. He was descended from the Ó Maolconaire family of Elphin , County Roscommon . The family... | https://en.wikipedia.org/wiki/Sir_John_Conroy,_3rd_Baronet |
The Sir William Dunn Professorship of Biochemistry is the senior professorship in biochemistry at the University of Cambridge . The position was established in 1914 by the trustees of the will of Sir William Dunn , banker, merchant and philanthropist. [ 1 ]
The first holder of the chair was Frederick Gowland Hopkins ,... | https://en.wikipedia.org/wiki/Sir_William_Dunn_Professor_of_Biochemistry |
The siriometer is an obsolete astronomical unit of length , defined to be equal to one million astronomical units (au). [ 1 ] [ 2 ] One siriometer is approximately 149.6 petametres ; 4.848 parsecs ; 15.81 light-years . The distance from Earth to the star Sirius is then approximately 0.54 siriometers. [ 3 ]
The unit wa... | https://en.wikipedia.org/wiki/Siriometer |
In Greek and Roman mythology and religion , Sirius ( / ˈ s ɪ r ɪ ə s / , SEE -ree-əss ; Ancient Greek : Σείριος , romanized : Seírios , lit. 'scorching' pronounced [sěːrios] ) is the god and personification of the star Sirius , also known as the Dog Star, the brightest star in the night sky and the most prominent star ... | https://en.wikipedia.org/wiki/Sirius_(mythology) |
Sirolimus , also known as rapamycin and sold under the brand name Rapamune among others, is a macrolide compound that is used to coat coronary stents , prevent organ transplant rejection , treat a rare lung disease called lymphangioleiomyomatosis , and treat perivascular epithelioid cell tumour (PEComa). [ 1 ] [ 2 ] [ ... | https://en.wikipedia.org/wiki/Sirolimus |
Sirtris Pharmaceuticals, Inc. was a biotechnology company based in Cambridge, MA that developed therapies for type 2 diabetes, cancer, and other diseases. Conceived in 2004 by Harvard University biologist David Sinclair and Andrew Perlman , [ 1 ] and founded that year by Sinclair and Perlman, along with Christoph Westp... | https://en.wikipedia.org/wiki/Sirtris_Pharmaceuticals |
Sirtuin-activating compounds ( STAC ) are chemical compounds having an effect on sirtuins , a group of enzymes that use NAD+ to remove acetyl groups from proteins. They are caloric restriction mimetic compounds that may be helpful in treating various aging -related diseases. [ 1 ]
Leonard P. Guarente is recognized as ... | https://en.wikipedia.org/wiki/Sirtuin-activating_compound |
In mathematics, the Sister Beiter conjecture is a conjecture about the size of coefficients of ternary cyclotomic polynomials (i.e. where the index is the product of three prime numbers). It is named after Marion Beiter , a Catholic nun who first proposed it in 1968. [ 1 ]
For n ∈ N > 0 {\displaystyle n\in \mathbb {N}... | https://en.wikipedia.org/wiki/Sister_Beiter_conjecture |
In mathematics, Sister Celine's polynomials are a family of hypergeometric polynomials introduced by Mary Celine Fasenmyer in 1947. [ 1 ] They include Legendre polynomials , Jacobi polynomials and Bateman polynomials as special cases.
This polynomial -related article is a stub . You can help Wikipedia by expanding it ... | https://en.wikipedia.org/wiki/Sister_Celine's_polynomials |
In phylogenetics , a sister group or sister taxon , also called an adelphotaxon , [ 1 ] comprises the closest relative(s) of another given unit in an evolutionary tree . [ 2 ]
The expression is most easily illustrated by a cladogram :
Taxon A
Taxon B
Taxon C
More tree branches
Taxon A and taxon B are sister group... | https://en.wikipedia.org/wiki/Sister_group |
In ultra- low-temperature physics , Sisyphus cooling , the Sisyphus effect , or polarization gradient cooling involves the use of specially selected laser light, hitting atoms from various angles to both cool and trap them in a potential well, effectively rolling the atom down a hill of potential energy until it has lo... | https://en.wikipedia.org/wiki/Sisyphus_cooling |
SitNGo Wizard (sometimes referred to as SNG Wizard ) is a poker tool software program to aid online poker players in determining their optimal betting actions during the late stages of Sit and go poker contests. [ 1 ] [ 2 ]
The software enables players to load their hand histories so that they can get computerized fee... | https://en.wikipedia.org/wiki/SitNGo_Wizard |
Sit Kim Ping is a Singaporean biochemist and an Emeritus Professor at the Department of Biochemistry at the National University of Singapore . [ 1 ] She was the Head of the Department of Biochemistry (part of the Yong Loo Lin School of Medicine ) from 1996 to 2000. [ 2 ]
Sit was born in 1941 and attended Tanjong Katon... | https://en.wikipedia.org/wiki/Sit_Kim_Ping |
Site-directed mutagenesis is a molecular biology method that is used to make specific and intentional mutating changes to the DNA sequence of a gene and any gene products . Also called site-specific mutagenesis or oligonucleotide-directed mutagenesis , it is used for investigating the structure and biological activity ... | https://en.wikipedia.org/wiki/Site-directed_mutagenesis |
Site-directed spin labeling (SDSL) is a technique for investigating the structure and local dynamics of proteins using electron spin resonance . The theory of SDSL is based on the specific reaction of spin labels with amino acids . A spin label's built-in protein structure can be detected by EPR spectroscopy. SDSL is ... | https://en.wikipedia.org/wiki/Site-directed_spin_labeling |
Site-specific architecture (SSA) is architecture which is of its time and of its place. It is designed to respond to both its physical context, and the metaphysical context within which it has been conceived and executed. The physical context will include its location , local materials, planning framework, building cod... | https://en.wikipedia.org/wiki/Site-specific_architecture |
Site-specific recombinase technologies are genome engineering tools that depend on recombinase enzymes to replace targeted sections of DNA.
In the late 1980s gene targeting in murine embryonic stem cells (ESCs) enabled the transmission of mutations into the mouse germ line, and emerged as a novel option to study the g... | https://en.wikipedia.org/wiki/Site-specific_recombinase_technology |
Site-specific recombination , also known as conservative site-specific recombination , is a type of genetic recombination in which DNA strand exchange takes place between segments possessing at least a certain degree of sequence homology . [ 1 ] [ 2 ] [ 3 ] Enzymes known as site-specific recombinases (SSRs) perform rea... | https://en.wikipedia.org/wiki/Site-specific_recombination |
In the construction industry , site managers , often referred to as construction managers , site agents or building managers , are responsible for the day-to-day on site running of a construction project . Site managers are required to keep within the timescale and budget of a project, and manage any delays or problems... | https://en.wikipedia.org/wiki/Site_manager |
Site Reliability Engineering ( SRE ) is a discipline in the field of Software Engineering and IT infrastructure support that monitors and improves the availability and performance of deployed software systems and large software services (which are expected to deliver reliable response times across events such as new so... | https://en.wikipedia.org/wiki/Site_reliability_engineering |
The Sitnikov problem is a restricted version of the three-body problem named after Russian mathematician Kirill Alexandrovitch Sitnikov that attempts to describe the movement of three celestial bodies due to their mutual gravitational attraction. A special case of the Sitnikov problem was first discovered by the Americ... | https://en.wikipedia.org/wiki/Sitnikov_problem |
The Siwoloboff method is used to determine the boiling point of small samples of liquid chemicals. A sample in an ignition tube (also called a fusion tube) is attached to a thermometer with a rubber band, and immersed in a Thiele tube , water bath, or other suitable medium for heating. A sealed capillary, open end poin... | https://en.wikipedia.org/wiki/Siwoloboff_method |
Six degrees of freedom ( 6DOF ), or sometimes six degrees of movement , refers to the six mechanical degrees of freedom of movement of a rigid body in three-dimensional space . Specifically, the body is free to change position as forward/backward (surge), up/down (heave), left/right (sway) translation in three perpendi... | https://en.wikipedia.org/wiki/Six_degrees_of_freedom |
In mathematics , specifically transcendental number theory , the six exponentials theorem is a result that, given the right conditions on the exponents, guarantees the transcendence of at least one of a set of six exponentials.
e x 1 y 1 , e x 1 y 2 , e x 2 y 1 , e x 2 y 2 , e x 3 y 1 , e x 3 y 2 . {\displaystyle e^{x... | https://en.wikipedia.org/wiki/Six_exponentials_theorem |
The six-factor formula is used in nuclear engineering to determine the multiplication of a nuclear chain reaction in a non-infinite medium.
The symbols are defined as: [ 2 ]
The multiplication factor, k , is defined as (see nuclear chain reaction ): | https://en.wikipedia.org/wiki/Six_factor_formula |
A sequence of six consecutive nines occurs in the decimal representation of the number pi ( π ), starting at the 762nd decimal place. [ 1 ] [ 2 ] It has become famous because of the mathematical coincidence , and because of the idea that one could memorize the digits of π up to that point, and then suggest that π is ra... | https://en.wikipedia.org/wiki/Six_nines_in_pi |
In arithmetic and algebra the sixth power of a number n is the result of multiplying six instances of n together. So:
Sixth powers can be formed by multiplying a number by its fifth power , multiplying the square of a number by its fourth power , by cubing a square, or by squaring a cube.
The sequence of sixth powers... | https://en.wikipedia.org/wiki/Sixth_power |
Size in general is the magnitude or dimensions of a thing. More specifically, geometrical size (or spatial size ) can refer to three geometrical measures : length , area , or volume . Length can be generalized to other linear dimensions (width, height , diameter , perimeter ).
Size can also be measured in terms of mas... | https://en.wikipedia.org/wiki/Size |
Size-asymmetric competition refers to situations in which larger individuals exploit disproportionately greater amounts of resources when competing with smaller individuals. [ 1 ] This type of competition is common among plants [ 2 ] but also exists among animals . [ 3 ] Size-asymmetric competition usually results from... | https://en.wikipedia.org/wiki/Size-asymmetric_competition |
Size-exclusion chromatography , also known as molecular sieve chromatography , [ 1 ] is a chromatographic method in which molecules in solution are separated by their shape , and in some cases size . [ 2 ] It is usually applied to large molecules or macromolecular complexes such as proteins and industrial polymers . [ ... | https://en.wikipedia.org/wiki/Size-exclusion_chromatography |
In quantum chemistry , size consistency and size extensivity are concepts relating to how the behaviour of quantum-chemistry calculations changes with the system size. Size consistency (or strict separability ) is a property that guarantees the consistency of the energy behaviour when interaction between the involved m... | https://en.wikipedia.org/wiki/Size_consistency_and_size_extensivity |
According to the classical theories of elastic or plastic structures made from a material with non- random strength ( f t ), the nominal strength ( σ N ) of a structure is independent of the structure size ( D ) when geometrically similar structures are considered. [ 1 ] Any deviation from this property is called the s... | https://en.wikipedia.org/wiki/Size_effect_on_structural_strength |
Size functions are shape descriptors, in a geometrical/topological sense. They are functions from the half-plane x < y {\displaystyle x<y} to the natural numbers, counting certain connected components of a topological space . They are used in pattern recognition and topology .
In size theory , the size function ℓ ( M ... | https://en.wikipedia.org/wiki/Size_function |
In mathematics , size theory studies the properties of topological spaces endowed with R k {\displaystyle \mathbb {R} ^{k}} -valued functions , with respect to the change of these functions. More formally, the subject of size theory is the study of the natural pseudodistance between size pairs .
A survey of size theory... | https://en.wikipedia.org/wiki/Size_theory |
SkQ is a class of mitochondria -targeted antioxidants , developed by Professor Vladimir Skulachev and his team. In a broad sense, SkQ is a lipophilic cation , linked via saturated hydrocarbon chain to an antioxidant . Due to its lipophilic properties, SkQ can effectively penetrate through various cell membranes . The p... | https://en.wikipedia.org/wiki/SkQ |
The Skattebøl rearrangement is an organic reaction for converting a geminal dihalo cyclopropane to an allene using an organolithium base. [ 1 ] [ 2 ] This rearrangement reaction is named after its discoverer, Lars Skattebøl , Professor emeritus at the University of Oslo . It proceeds through a carbene reaction intermed... | https://en.wikipedia.org/wiki/Skattebøl_rearrangement |
The skeletal formula , line-angle formula , bond-line formula or shorthand formula of an organic compound is a type of minimalist structural formula representing a molecule 's atoms , bonds and some details of its geometry . The lines in a skeletal formula represent bonds between carbon atoms, unless labelled with ano... | https://en.wikipedia.org/wiki/Skeletal_formula |
Skeleton programming is a style of computer programming based on simple high-level program structures and so called dummy code . Program skeletons resemble pseudocode , but allow parsing , compilation and testing of the code. Dummy code is inserted in a program skeleton to simulate processing and avoid compilation err... | https://en.wikipedia.org/wiki/Skeleton_(computer_programming) |
Skeptics in the Pub (abbreviated SITP ) is an informal social event designed to promote fellowship and social networking among skeptics , critical thinkers , freethinkers , rationalists and other like-minded individuals. It provides an opportunity for skeptics to talk, share ideas and have fun in a casual atmosphere, a... | https://en.wikipedia.org/wiki/Skeptics_in_the_Pub |
A skeuomorph (also spelled skiamorph , / ˈ s k juː ə ˌ m ɔːr f , ˈ s k juː oʊ -/ ) [ 1 ] [ 2 ] is a derivative object that retains ornamental design cues (attributes) from structures that were necessary in the original. [ 3 ] Skeuomorphs are typically used to make something new feel familiar in an effort to speed under... | https://en.wikipedia.org/wiki/Skeuomorph |
In linear algebra , a skew-Hamiltonian matrix is a specific type of matrix that corresponds to a skew-symmetric bilinear form on a symplectic vector space . Let V {\displaystyle V} be a vector space equipped with a symplectic form, denoted by Ω. A symplectic vector space must necessarily be of even dimension .
A linea... | https://en.wikipedia.org/wiki/Skew-Hamiltonian_matrix |
In linear algebra , a square matrix with complex entries is said to be skew-Hermitian or anti-Hermitian if its conjugate transpose is the negative of the original matrix. [ 1 ] That is, the matrix A {\displaystyle A} is skew-Hermitian if it satisfies the relation
A skew-Hermitian ⟺ A H = − A {\displaystyle A{\text{ sk... | https://en.wikipedia.org/wiki/Skew-Hermitian_matrix |
A skew arch (also known as an oblique arch ) is a method of construction that enables an arch bridge to span an obstacle at some angle other than a right angle . This results in the faces of the arch not being perpendicular to its abutments and its plan view being a parallelogram , rather than the rectangle that is the... | https://en.wikipedia.org/wiki/Skew_arch |
The skew binary number system is a non-standard positional numeral system in which the n th digit contributes a value of 2 n + 1 − 1 {\displaystyle 2^{n+1}-1} times the digit (digits are indexed from 0) instead of 2 n {\displaystyle 2^{n}} times as they do in binary . Each digit has a value of 0, 1, or 2. A number can... | https://en.wikipedia.org/wiki/Skew_binary_number_system |
A system of skew coordinates , sometimes called oblique coordinates , is a curvilinear coordinate system where the coordinate surfaces are not orthogonal , [ 1 ] as in orthogonal coordinates .
Skew coordinates tend to be more complicated to work with compared to orthogonal coordinates since the metric tensor will have... | https://en.wikipedia.org/wiki/Skew_coordinates |
In three-dimensional geometry , skew lines are two lines that do not intersect and are not parallel . A simple example of a pair of skew lines is the pair of lines through opposite edges of a regular tetrahedron . Two lines that both lie in the same plane must either cross each other or be parallel, so skew lines can ... | https://en.wikipedia.org/wiki/Skew_lines |
In number theory , Skewes's number is the smallest natural number x {\displaystyle x} for which the prime-counting function π ( x ) {\displaystyle \pi (x)} exceeds the logarithmic integral function li ( x ) . {\displaystyle \operatorname {li} (x).} It is named for the South African mathematician Stanley Skewes who fi... | https://en.wikipedia.org/wiki/Skewes's_number |
The Ski complex is a multi- protein complex involved in the 3' end degradation of messenger RNAs in yeast. [ 1 ]
The complex consists of three main proteins , the RNA helicase Ski2 and the proteins Ski3 and Ski8 . This tetramer contains a 370 kDa core complex, containing N-terminal arms and C-terminal arms from Ski3 .... | https://en.wikipedia.org/wiki/Ski_complex |
A skid loader , skid-steer loader ( SSL ), or skidsteer is any of a class of compact heavy equipment with lift arms that can attach to a wide variety of buckets and other labor-saving tools or attachments.
The wheels typically have no separate steering mechanism and hold a fixed straight alignment on the body of the m... | https://en.wikipedia.org/wiki/Skid-steer_loader |
A skidder is any type of heavy vehicle used in a logging operation for pulling cut trees out of a forest in a process called "skidding", in which the logs are transported from the cutting site to a landing. There they are loaded onto trucks (or in times past, railroad cars or flumes ), and sent to the mill. One excepti... | https://en.wikipedia.org/wiki/Skidder |
Skin allergy testing comprises a range of methods for medical diagnosis of allergies that attempts to provoke a small, controlled, allergic response.
A microscopic amount of an allergen is introduced to a patient's skin by various means: [ 1 ]
If an immuno-response is seen in the form of a rash , urticaria ( hives ),... | https://en.wikipedia.org/wiki/Skin_allergy_test |
Skin flora , also called skin microbiota , refers to microbiota ( communities of microorganisms ) that reside on the skin , typically human skin .
Many of them are bacteria of which there are around 1,000 species upon human skin from nineteen phyla . [ 1 ] [ 2 ] Most are found in the superficial layers of the epidermis... | https://en.wikipedia.org/wiki/Skin_flora |
In trigonometry , a skinny triangle [ citation needed ] is a triangle whose height is much greater than its base. The solution of such triangles can be greatly simplified by using the approximation that the sine of a small angle is equal to that angle in radians . The solution is particularly simple for skinny triangle... | https://en.wikipedia.org/wiki/Skinny_triangle |
A skirret is an archaic form of chalk line . It is a wooden tool shaped like the letter "T", historically used to ensure the foundation of a building was straight by laying down string as a marker. Today it is obsolete and little known, save for its use in some Freemasonry ceremonies. [ 1 ]
This tool article is a stub... | https://en.wikipedia.org/wiki/Skirret_(tool) |
Skirt-bag (Croatian: Suknja-torba) - a hybrid fashion design item made by Ivana Barač presented in 2008 in Kino EUROPA, Zagreb , Croatia . Design is not a common baggy skirt design, but a specific dual function item with exceptional construction.
Ivana Barač is a Croatian fashion designer from Dubrovnik with a backgro... | https://en.wikipedia.org/wiki/Skirt-bag |
In probability theory and statistics , a copula is a multivariate cumulative distribution function for which the marginal probability distribution of each variable is uniform on the interval [0, 1]. Copulas are used to describe/model the dependence (inter-correlation) between random variables . [ 1 ] Their name, introd... | https://en.wikipedia.org/wiki/Sklar's_theorem |
In mathematics , specifically the field of algebra , Sklyanin algebras are a class of noncommutative algebra named after Evgeny Sklyanin . This class of algebras was first studied in the classification of Artin-Schelter regular [ 1 ] algebras of global dimension 3 in the 1980s. [ 2 ] Sklyanin algebras can be grouped in... | https://en.wikipedia.org/wiki/Sklyanin_algebra |
The Skoda–El Mir theorem is a theorem of complex geometry ,
stated as follows:
Theorem ( Skoda , [ 1 ] El Mir, [ 2 ] Sibony [ 3 ] ). Let X be a complex manifold , and E a closed complete pluripolar set in X . Consider a closed positive current Θ {\displaystyle \Theta } on X ∖ E {\displaystyle X\backslash E} which is... | https://en.wikipedia.org/wiki/Skoda–El_Mir_theorem |
In mathematical logic , Skolem arithmetic is the first-order theory of the natural numbers with multiplication , named in honor of Thoralf Skolem . The signature of Skolem arithmetic contains only the multiplication operation and equality, omitting the addition operation entirely.
Skolem arithmetic is weaker than Pean... | https://en.wikipedia.org/wiki/Skolem_arithmetic |
In mathematical logic , a formula of first-order logic is in Skolem normal form if it is in prenex normal form with only universal first-order quantifiers .
Every first-order formula may be converted into Skolem normal form while not changing its satisfiability via a process called Skolemization (sometimes spelled Sko... | https://en.wikipedia.org/wiki/Skolem_normal_form |
In additive and algebraic number theory , the Skolem–Mahler–Lech theorem states that if a sequence of numbers satisfies a linear difference equation , then with finitely many exceptions the positions at which the sequence is zero form a regularly repeating pattern. This result is named after Thoralf Skolem (who proved ... | https://en.wikipedia.org/wiki/Skolem–Mahler–Lech_theorem |
In mathematics and probability theory , Skorokhod's embedding theorem is either or both of two theorems that allow one to regard any suitable collection of random variables as a Wiener process ( Brownian motion ) evaluated at a collection of stopping times . Both results are named for the Ukrainian mathematician A. V. ... | https://en.wikipedia.org/wiki/Skorokhod's_embedding_theorem |
In mathematics and statistics , Skorokhod's representation theorem is a result that shows that a weakly convergent sequence of probability measures whose limit measure is sufficiently well-behaved can be represented as the distribution/law of a pointwise convergent sequence of random variables defined on a common proba... | https://en.wikipedia.org/wiki/Skorokhod's_representation_theorem |
The Skraup synthesis is a chemical reaction used to synthesize quinolines . It is named after the Czech chemist Zdenko Hans Skraup (1850–1910). In the archetypal Skraup reaction, aniline is heated with sulfuric acid , glycerol , and an oxidizing agent such as nitrobenzene to yield quinoline. [ 1 ] [ 2 ] [ 3 ] [ 4 ]
In... | https://en.wikipedia.org/wiki/Skraup_reaction |
A skull and crossbones is a symbol consisting of a human skull and two long bones crossed together under or behind the skull. [ 1 ] The design originated in the Late Middle Ages as a symbol of death and especially as a memento mori on tombstones. Actual skulls and bones were long used to mark the entrances to Spanish c... | https://en.wikipedia.org/wiki/Skull_and_crossbones |
The skull crucible process was developed at the Lebedev Physical Institute in Moscow to manufacture cubic zirconia . [ 1 ] It was invented to solve the problem of cubic zirconia's melting-point being too high for even platinum crucibles .
In essence, by heating only the center of a volume of cubic zirconia, the materi... | https://en.wikipedia.org/wiki/Skull_crucible |
SkyGrabber is a software from the Russian company SkySoftware which accepts input from a digital satellite tuner card for hard drive recording.
It was used by Iraqi insurgents from the group Kata'ib Hezbollah to intercept MQ-1 Predator drone video feeds, which were not encrypted. [ 1 ] [ 2 ] The encryption for the fee... | https://en.wikipedia.org/wiki/SkyGrabber |
The Celestron SkyScout was a model of handheld consumer electronic instrument for astronomical orientation and education, similar to the competitor product mySky by Meade Instruments . The general class of zero-magnification sky-orientation scopes using modern geodesy was made possible by the commercialisation of GPS a... | https://en.wikipedia.org/wiki/SkyScout |
SkyTerra ( SKYT ), formerly Mobile Satellite Ventures ( MSV or MSVLP ), was a Reston, Virginia company that developed telecommunications systems that integrate satellite and terrestrial radio communication technologies into one system. In March 2010, the company was acquired by Harbinger Capital Partners and under the ... | https://en.wikipedia.org/wiki/SkyTerra |
Città dell'Aria Montecelio ( Italian pronunciation: [tʃitˌtadelˈlaːrja ˌmonteˈtʃeːljo] ) was the name given by insiders in the 1930s to the area dedicated to Italian aeronautic research in the village of Montecelio, in the region of Lazio , near Rome .
In 1937 the village was renamed Guidonia Montecelio to honour Gen.... | https://en.wikipedia.org/wiki/Sky_City_Montecelio_(Lazio) |
Sky crane is a soft landing system used in the last part of the entry, descent and landing (EDL) sequence developed by NASA Jet Propulsion Laboratory for its two largest Mars rovers , Curiosity and Perseverance . While previous rovers used airbags for landing, both Curiosity and Perseverance were too heavy to be landed... | https://en.wikipedia.org/wiki/Sky_crane_(landing_system) |
Sky islands are isolated mountains surrounded by radically different lowland environments. The term originally referred to those found on the Mexican Plateau and has extended to similarly isolated high-elevation forests . The isolation has significant implications for these natural habitats. Endemism , altitudinal migr... | https://en.wikipedia.org/wiki/Sky_island |
A sky quality meter ( SQM ) is an instrument used to measure the luminance of the night sky , more specifically the Night Sky Brightness (NSB) at the zenith, with a bandwidth ranging from 390 nm to 600 nm. [ 1 ] It is used, typically by amateur astronomers , to quantify the skyglow aspect of light pollution and uses un... | https://en.wikipedia.org/wiki/Sky_quality_meter |
Skyline is an open source software for targeted proteomics [ 1 ] [ 2 ] and metabolomics [ 3 ] data analysis. It runs on Microsoft Windows and supports the raw data formats from multiple mass spectrometric vendors. It contains a graphical user interface to display chromatographic data for individual peptide or small mol... | https://en.wikipedia.org/wiki/Skyline_(software) |
Skynet is a fictional artificial neural network -based conscious group mind and artificial general superintelligence system that serves as the main antagonist of the Terminator franchise . Skynet is an AGI , an ASI and a Singularity .
In the first film , it is stated that Skynet was created by Cyberdyne Systems for SA... | https://en.wikipedia.org/wiki/Skynet_(Terminator) |
A skyscraper is a tall continuously habitable building having multiple floors. Most modern sources define skyscrapers as being at least 100 metres (330 ft) [ 1 ] or 150 metres (490 ft) [ 2 ] in height, though there is no universally accepted definition, other than being very tall high-rise buildings . Skyscrapers may h... | https://en.wikipedia.org/wiki/Skyscraper |
In geometry , a slab is a region between two parallel lines in the Euclidean plane , [ 1 ] or between two parallel planes in three-dimensional Euclidean space or between two hyperplanes in higher dimensions . [ 2 ]
A slab can also be defined as a set of points: [ 3 ] { x ∈ R n ∣ α ≤ n ⋅ x ≤ β } , {\displaystyle \{x\in... | https://en.wikipedia.org/wiki/Slab_(geometry) |
The NCR 315 Data Processing System , released in January 1962 by NCR , [ 1 ] is a second-generation computer . All printed circuit boards use resistor–transistor logic (RTL) to create the various logic elements. It uses 12-bit slab memory structure using magnetic-core memory . The instructions can use a memory slab as ... | https://en.wikipedia.org/wiki/Slab_(unit) |
In electrical power systems a slack bus (or swing bus ), defined as a Vδ bus, is used to balance the active power | P | {\displaystyle |P|} and reactive power | Q | {\displaystyle |Q|} in a system while performing load flow studies . The slack bus is used to provide for system losses by emitting or absorbing active and... | https://en.wikipedia.org/wiki/Slack_bus |
The general term slag may be a by-product or co-product of smelting ( pyrometallurgical ) ores and recycled metals depending on the type of material being produced. [ 1 ] Slag is mainly a mixture of metal oxides and silicon dioxide . Broadly, it can be classified as ferrous (co-products of processing iron and steel), f... | https://en.wikipedia.org/wiki/Slag |
The SLAPD ( Standalone LDAP Daemon ) and SLURPD (Stand-alone LDAP update replication daemon) originally evolved within the long-running project that developed the LDAP protocol. [ 1 ] [ 2 ] It was developed at the University of Michigan , and was the first Lightweight Directory Access Protocol (LDAP) software. [ 3 ]
... | https://en.wikipedia.org/wiki/Slapd |
The slashed zero , , is a representation of the Arabic digit zero ("0") with a slash through it. This variant zero glyph is often used to distinguish the digit zero from the Latin script letter O anywhere that the distinction needs emphasis, particularly in encoding systems, scientific and engineering applications, com... | https://en.wikipedia.org/wiki/Slashed_zero |
Astral Codex Ten (ACX), formerly Slate Star Codex (SSC), is a blog focused on science , medicine (especially psychiatry ), philosophy , politics , and futurism . The blog is written by Scott Alexander Siskind, [ 1 ] a San Francisco Bay Area psychiatrist , [ 2 ] under the pen name Scott Alexander.
Slate Star Codex was ... | https://en.wikipedia.org/wiki/Slate_Star_Codex |
In quantum chemistry , Slater's rules provide numerical values for the effective nuclear charge in a many-electron atom. Each electron is said to experience less than the actual nuclear charge , because of shielding or screening by the other electrons. For each electron in an atom, Slater's rules provide a value for th... | https://en.wikipedia.org/wiki/Slater's_rules |
Slater-type orbitals ( STOs ) or Slater-type functions (STFs) are functions used as atomic orbitals in the linear combination of atomic orbitals molecular orbital method . They are named after the physicist John C. Slater , who introduced them in 1930. [ 1 ]
They possess exponential decay at long range and Kato's cusp... | https://en.wikipedia.org/wiki/Slater-type_orbital |
In quantum mechanics , a Slater determinant is an expression that describes the wave function of a multi- fermionic system. It satisfies anti-symmetry requirements, and consequently the Pauli principle , by changing sign upon exchange of two fermions. [ 1 ] Only a small subset of all possible many-body fermionic wave f... | https://en.wikipedia.org/wiki/Slater_determinant |
In mathematics and mathematical physics, Slater integrals are certain integrals of products of three spherical harmonics . They occur naturally when applying an orthonormal basis of functions on the unit sphere that transform in a particular way under rotations in three dimensions. Such integrals are particularly usefu... | https://en.wikipedia.org/wiki/Slater_integrals |
Within computational chemistry , the Slater–Condon rules express integrals of one- and two-body operators over wavefunctions constructed as Slater determinants of orthonormal orbitals in terms of the individual orbitals. In doing so, the original integrals involving N -electron wavefunctions are reduced to sums over in... | https://en.wikipedia.org/wiki/Slater–Condon_rules |
In condensed matter physics , the Slater–Pauling rule states that adding an element to a metal alloy will reduce the alloy's saturation magnetization by an amount proportional to the number of valence electrons outside of the added element's d shell . [ 1 ] Conversely, elements with a partially filled d shell will incr... | https://en.wikipedia.org/wiki/Slater–Pauling_rule |
The slave boson method is a technique for dealing with models of strongly correlated systems , providing a method to second-quantize valence fluctuations within a restrictive manifold of states.
In the 1960s the physicist John Hubbard introduced an operator, now named the "Hubbard operator" [ 1 ] to describe the cr... | https://en.wikipedia.org/wiki/Slave_boson |
Slayton A. Evans Jr. (May 17, 1943 – March 24, 2001) was an American chemist and professor at the University of North Carolina, Chapel Hill . He was a leading researcher into organophosphorus chemistry. His research led to a greater understanding of the functions of organophosphate compounds and innovations in methods ... | https://en.wikipedia.org/wiki/Slayton_A._Evans_Jr. |
The sleep cycle is an oscillation between the slow-wave and REM (paradoxical) phases of sleep . It is sometimes called the ultradian sleep cycle , sleep–dream cycle , or REM-NREM cycle , to distinguish it from the circadian alternation between sleep and wakefulness . In humans, this cycle takes 70 to 110 minutes (90 ± ... | https://en.wikipedia.org/wiki/Sleep_cycle |
Sleep is a biological requirement for all animals that have a brain, except for ones which have only a rudimentary brain. Therefore basal species do not sleep, since they do not have brains. It has been observed in mammals, birds, reptiles, amphibians, fish, and, in some form, in insects. The internal circadian clock p... | https://en.wikipedia.org/wiki/Sleep_in_animals |
A sleeper wall may refer to the following types of walls:
This architectural element –related article is a stub . You can help Wikipedia by expanding it . | https://en.wikipedia.org/wiki/Sleeper_wall |
Incapacitating agent is a chemical or biological agent which renders a person unable to harm themselves or others, regardless of consciousness . [ 1 ]
Lethal agents are primarily intended to kill, but incapacitating agents can also kill if administered in a potent enough dose, or in certain scenarios.
The term "incap... | https://en.wikipedia.org/wiki/Sleeping_gas |
In construction , a sleeve is used both by the electrical and mechanical trades to create a penetration in a solid wall, ceilling or floor.
Sleeves can be made of: | https://en.wikipedia.org/wiki/Sleeve_(construction) |
In fluid dynamics and electrostatics , slender-body theory is a methodology that can be used to take advantage of the slenderness of a body to obtain an approximation to a field surrounding it and/or the net effect of the field on the body. Principal applications are to Stokes flow — at very low Reynolds numbers — and ... | https://en.wikipedia.org/wiki/Slender-body_theory |
In architecture , the slenderness ratio , or simply slenderness , is an aspect ratio , the quotient between the height and the width of a building .
In structural engineering , slenderness is used to calculate the propensity of a column to buckle . It is defined as l / k {\displaystyle l/k} where l {\displaystyle l} i... | https://en.wikipedia.org/wiki/Slenderness_ratio |
In probability theory , Slepian's lemma (1962), named after David Slepian , is a Gaussian comparison inequality. It states that for Gaussian random variables X = ( X 1 , … , X n ) {\displaystyle X=(X_{1},\dots ,X_{n})} and Y = ( Y 1 , … , Y n ) {\displaystyle Y=(Y_{1},\dots ,Y_{n})} in R n {\displaystyle \mathbb {R} ^{... | https://en.wikipedia.org/wiki/Slepian's_lemma |
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