Scientific News

Articles across mathematics, physics, chemistry, biology, and astronomy.

• Science

  Tarjan's algorithm

  Tarjan's algorithm may refer to one of several algorithms attributed to Robert Tarjan, including: Tarjan's strongly connected components algorithm Tarjan's off-line lowest common ancestors algorithm Tarjan's algorithm for finding bridges in an undirected graph Tarjan's algorithm for finding simple circuits in a directed graph

  8/25/2026

• Science

  Taxonomic vandalism

  Taxonomic vandalism is a term used in biology to describe the practice of publishing numerous scientifically unfounded or poorly-justified taxonomic names, often without adequate research or peer review. This phenomenon has been observed across various fields of taxonomy, but has been particularly prevalent in herpetology.

  8/25/2026

• Science

  Taxonomy (biology)

  In biology, taxonomy (from Ancient Greek τάξις (taxis) 'arrangement' and -νομία (-nomia) 'method') is the scientific study of naming, defining (circumscribing) and classifying groups of biological organisms based on shared characteristics. Modern approaches prioritize common ancestry and evolutionary relationships. Organisms are grouped into taxa (singular: taxon), and these groups are given a t

  8/25/2026

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  Science

  Taxon

  In biology, a taxon is a group of one or more populations of an organism, or organisms, as seen by taxonomists to form a biological unit; (taxon: back-formation from taxonomy; pl.: taxa). Although neither is required, a taxon, once its description has become established, is usually known by a particular name and is given a particular ranking.

  8/25/2026

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  Science

  Teays River

  The Teays River (pronounced taze) was a major preglacial river that drained much of the present Ohio River watershed, but took a more northerly downstream course. Traces of the Teays across northern Ohio and Indiana are represented by a network of river valleys. The largest still existing contributor to the former Teays River is the Kanawha River in West Virginia, which is itself an extension of

  8/25/2026

• Science

  Taxonomy of Drosera

  The genus Drosera was divided in 1994 by Seine & Barthlott into three subgenera and 11 sections on the basis of morphological characteristics. Discovery and description of new species has been occurring since the 10th century, and as recently as the 1940s barely more than 80 species were known. In recent years, Australian Allen Lowrie has done extensive work in the genus, particularly in describin

  8/25/2026

• Science

  Teaching clinic

  A teaching clinic is an outpatient clinic that provides health care for ambulatory patients - as opposed to inpatients treated in a hospital. Teaching clinics traditionally are operated by educational facilities and provide free or low-cost services to patients. Teaching clinics differ from standard health clinics in that treatment is performed by graduate students under the supervision of license

  8/25/2026

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  Science

  Target strength

  The target strength or acoustic size is a measure of the area of a sonar target. This is usually quantified as a number of decibels. For fish such as salmon, the target size varies with the length of the fish and a 5 cm fish could have a target strength of about -50 dB. The target strength of a fish also depends on the orientation of the fish at the moment of sonification, which in turn changes th

  8/25/2026

• Science

  Taylor–Goldstein equation

  The Taylor–Goldstein equation is an ordinary differential equation used in the fields of geophysical fluid dynamics, and more generally in fluid dynamics, in presence of quasi-2D flows. It describes the dynamics of the Kelvin–Helmholtz instability, subject to buoyancy forces (e.g. gravity), for stably stratified fluids in the dissipation-less limit. Or, more generally, the dynamics of internal wav

  8/25/2026

• Science

  Taxon in disguise

  In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals that it has evolved from another unit of a similar or lower rank, making the parent unit paraphyletic. That happens when rapid evolution makes a new species appear so radically different from the ancestral group that it is not (initially) recognised as belonging t

  8/25/2026

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  Science

  Tau (mathematics)

  The number τ ( ; spelled out as tau) is a mathematical constant that is the ratio of a circle's circumference to its radius. It is exactly equal to 2π and approximately equal to 6.283185. τ and π are both circle constants relating the circumference of a circle to its linear dimension: the radius in the case of τ; the diameter in the case of π. While π is used almost exclusively in mainstream mathe

  8/25/2026

• Science

  Taylor's law

  Taylor's power law is an empirical law in ecology that relates the variance of the number of individuals of a species per unit area of habitat to the corresponding mean by a power law relationship. It is named after the ecologist who first proposed it in 1961, Lionel Roy Taylor (1924–2007). Taylor's original name for this relationship was the law of the mean. The name Taylor's law was coined by S

  8/25/2026

• Science

  Taxonomic impediment

  Conservationists, ecologists, biodiversity scientists, lawmakers, and many others rely heavily on taxonomic information to manage, conserve, use, and share our biodiversity. The world-wide shortage of this important taxonomic information, the gaps in our taxonomic knowledge, and the shortage of trained taxonomists and curators to fill this need has come to be known as the taxonomic impediment. The

  8/25/2026

• Science

  Tarumitra

  Tarumitra is a nationwide students' organization to promote ecological sensitivity in India. It has been campaigning for sensitizing various sections of society on ecological issues. It was started in 1988 by students in Patna, India. U.N has conferred a Special Consultative Status to Tarumitra from 2005. It has over 2,00,000 members in over 1000 high schools and colleges. Tarumitra has also had s

  8/25/2026

• Science

  Teach-back method

  The teach-back method, also referred to as "show-me" method, is a communication confirmation method used by healthcare providers to confirm whether a patient (or care takers) understands what is being explained to them. If a patient understands, they are able to "teach-back" the information accurately. This is a communication method intended to improve health literacy. There can be a significant g

  8/25/2026

• Science

  Tashiro's indicator

  Tashiro's indicator is a pH indicator (pH value: 4.4–6.2), mixed indicator composed of a solution of methylene blue (0.1%) and methyl red (0.03%) in ethanol or in methanol. It can be used for the titration of ammonia in Kjeldahl analysis.

  8/25/2026

• Science

  Teacher Institute for Evolutionary Science

  The Teacher Institute for Evolutionary Science (TIES) is a project of the Richard Dawkins Foundation for Reason and Science and a program of the Center for Inquiry which provides free workshops and materials to elementary, middle school, and, more recently, high school science teachers to enable them to effectively teach evolution based on the Next Generation Science Standards.

  8/25/2026

• Science

  Teaching quantum mechanics

  Quantum mechanics is a difficult subject to teach due to its counterintuitive nature. As the subject is now offered by advanced secondary schools, educators have applied scientific methodology to the process of teaching quantum mechanics, in order to identify common misconceptions and ways of improving students' understanding.

  8/25/2026

• Science

  TEA chloride

  TEA chloride may refer to: Tetraethylammonium chloride Triethylammonium chloride, the hydrochloride salt of triethylamine

  8/25/2026

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  Science

  Systematic Census of Australian Plants

  The Systematic census of Australian plants, with chronologic, literary and geographic annotations, more commonly known as the Systematic Census of Australian Plants, also known by its standard botanic abbreviation Syst. Census Austral. Pl., is a survey of the vascular flora of Australia prepared by Government botanist for the state of Victoria Ferdinand von Mueller and published in 1882. Von Muell

  8/25/2026

• Science

  Sūgaku Golden

  Sūgaku Golden (数学ゴールデン, Sūgaku Gōruden; lit. ''Mathematics Golden'') is a Japanese manga series written and illustrated by Tatsuhiko Kuramaru. It began serialization in Hakusensha's seinen manga magazine Young Animal Zero in September 2019.

  8/25/2026

• Science

  Table of prime factors

  The tables contain the prime factorization of the natural numbers from 1 to 1000. When n is a prime number, the prime factorization is just n itself, written in bold below. The number 1 is called a unit. It has no prime factors and is neither prime nor composite.

  8/25/2026

• Science

  System of equations

  In mathematics, a system of equations, also known as a set of simultaneous equations or an equation system, is a finite set of equations for which common solutions are sought. An equation system is usually classified in the same manner as single equations, namely as one of the following: System of linear equations System of nonlinear equations System of bilinear equations System of polynomial equ

  8/25/2026

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  Science

  Systems Biology Ontology

  The Systems Biology Ontology (SBO) is a set of controlled, relational vocabularies of terms commonly used in systems biology, and in particular in computational modeling.

  8/25/2026

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  Science

  Systematics

  Systematics is the study of the diversification of living forms, both past and present, and the relationships among living things through time. Relationships are visualized as evolutionary trees (synonyms: phylogenetic trees, phylogenies). Phylogenies have two components: branching order (showing group relationships, graphically represented in cladograms) and branch length (showing amount of evol

  8/25/2026

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  Systems design

  The basic study of system design is the understanding of component parts and their subsequent interaction with one another. Systems design has appeared in a variety of fields, including aeronautics, sustainability, computer/software architecture, and sociology.

  8/25/2026

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  Science

  System on a chip

  A system on a chip, or system on chip (SoC), is an integrated circuit that combines most or all key components of a computer or electronic system onto a single microchip. Typically, an SoC includes a central processing unit (CPU) with memory, input/output, and data storage control functions, along with optional features like a graphics processing unit (GPU), Wi-Fi connectivity, and radio frequency

  8/25/2026

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  Science

  Computer terminal

  A computer terminal is an electronic or electromechanical hardware device that can be used for entering data into, and transcribing data from, a computer or a computing system. Most early computers only had a front panel to input or display bits and had to be connected to a terminal to print or input text through a keyboard. Teleprinters were used as early-day hard-copy terminals and predated the

  8/25/2026

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  Science

  Systema Naturae

  Systema Naturae (originally in Latin written Systema Naturæ with the ligature æ) is one of the major works of Swedish botanist, zoologist, and physician Carl Linnaeus (1707–1778) and introduced the Linnaean taxonomy. Although the system, now known as binomial nomenclature, was partially developed by the Bauhin brothers, Gaspard and Johann, Linnaeus was the first to use it consistently throughout h

  8/25/2026

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  System equivalence

  In the systems sciences system equivalence is the behavior of a parameter or component of a system in a way similar to a parameter or component of a different system. Similarity means that mathematically the parameters and components will be indistinguishable from each other. Equivalence can be very useful in understanding how complex systems work.

  8/25/2026

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  Science

  Szemerédi regularity lemma

  In extremal graph theory, Szemerédi's regularity lemma states that a graph can be partitioned into a bounded number of parts so that the edges between parts are regular (in the sense defined below). The lemma shows that certain properties of random graphs can be applied to dense graphs like counting the copies of a given subgraph within graphs. Endre Szemerédi proved the lemma over bipartite grap

  8/25/2026

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  Systems management

  Systems management is enterprise-wide administration of distributed systems including (and commonly in practice) computer systems. Systems management is strongly influenced by network management initiatives in telecommunications. The application performance management (APM) technologies are now a subset of Systems management. Maximum productivity can be achieved more efficiently through event co

  8/25/2026

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  Science

  System in a package

  In computer engineering, a system in a package, system in package or SiP is a type of semiconductor packaging where multiple integrated circuits (ICs) are enclosed in one chip carrier. An SiP may include an IC package substrate that may include passive components and perform the functions of an entire system. The ICs may be stacked using die stacking or package on package, placed side by side (mul

  8/25/2026

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  Science

  System on module

  A system on a module (SoM) is a board-level circuit that integrates a system function in a single module. It may integrate digital and analog functions on a single board. A typical application is in the area of embedded systems. Unlike a single-board computer, a SoM serves a special function like a system on a chip (SoC). The devices integrated in the SoM typically require a high level of interco

  8/25/2026

• Science

  System migration

  System migration involves moving a set of instructions or programs, e.g., PLC (programmable logic controller) programs, from one platform to another, minimizing reengineering. Migration of systems can also involve downtime, while the old system is replaced with a new one. Migration can be from a mainframe computer which has a closed architecture, to an open system which employ x86 servers. As wel

  8/25/2026

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  System of polynomial equations

  A system of polynomial equations (sometimes simply a polynomial system) is a set of simultaneous equations f1 = 0, ..., fh = 0 where the fi are polynomials in several variables, say x1, ..., xn, over some field k. A solution of a polynomial system is a set of values for the xis which belong to some algebraically closed field extension K of k, and make all equations true. When k is the field of rat

  8/25/2026

• Science

  System on TPTP

  System on TPTP is an online interface to several automated theorem proving systems and other automated reasoning tools. It allows users to run the systems either on problems from the latest releases from the TPTP problem library or on user-supplied problems in the TPTP syntax. The system is maintained by Geoff Sutcliffe at the University of Miami. In November 2010, it featured more than 50 systems

  8/25/2026

• Science

  Table of Newtonian series

  In mathematics, a Newtonian series, named after Isaac Newton, is a sum over a sequence a n {\displaystyle a_{n}} written in the form f ( s ) = ∑ n = 0

  8/25/2026

• Science

  System size expansion

  The system size expansion, also known as van Kampen's expansion or the Ω-expansion, is a technique pioneered by Nico van Kampen used in the analysis of stochastic processes. Specifically, it allows one to find an approximation to the solution of a master equation with nonlinear transition rates. The leading order term of the expansion is given by the linear noise approximation, in which the master

  8/25/2026

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  Science

  Syzygy (astronomy)

  In astronomy, a syzygy ( SIZ-ə-jee) is a roughly straight-line configuration of three or more celestial bodies in a gravitational system. The word is often used in reference to the Sun, Earth, and either the Moon or a planet, where the latter is in conjunction or opposition. Solar and lunar eclipses occur at times of syzygy, as do transits and occultations.

  8/25/2026

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  Systemness

  Systemness is the state, quality, or condition of a complex system, that is, of a set of interconnected elements that behave as, or appear to be, a whole, exhibiting behavior distinct from the behavior of the parts. The term is new and has been applied to large social phenomena and organizations (healthcare and higher education) by advocates of higher degrees of system-like, coherent behavior for

  8/25/2026

• Science

  Systems chemistry

  Systems chemistry is the science of studying networks of interacting molecules, to create new functions from a set (or library) of molecules with different hierarchical levels and emergent properties. Systems chemistry is also related to the origin of life (abiogenesis).

  8/25/2026

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  Science

  T-symmetry

  T-symmetry or time reversal symmetry is the theoretical symmetry of physical laws under the transformation of time reversal, T : t ↦ − t . {\displaystyle T:t\mapsto -t.} Since the second law of thermodynamics states that entropy increases as time flows toward the future, in general, the macroscopic universe

  8/25/2026

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  Science

  Table of Lie groups

  This article gives a table of some common Lie groups and their associated Lie algebras. The following are noted: the topological properties of the group (dimension; connectedness; compactness; the nature of the fundamental group; and whether or not they are simply connected) as well as on their algebraic properties (abelian; simple; semisimple). For more examples of Lie groups and other related to

  8/25/2026

• Science

  TRANZ 330

  The TRANZ 330 is a popular point-of-sale device manufactured by VeriFone in 1985. The most common application for these units is bank and credit card processing, however, as a general purpose computer, they can perform other novel functions. Other applications include gift/benefit card processing, prepaid phone cards, payroll and employee timekeeping, and even debit and ATM cards. They are prog

  8/25/2026

• Science

  TOM (drug)

  TOM, also known as thio-DOM or as methylthio-DOM, may refer to the following: 2-TOM (2-thio-DOM) 5-TOM (5-thio-DOM) Other closely related compounds include: Bis-TOM (2,5-dithio-DOM) TOMSO (5-TOM-sulfoxide)

  8/25/2026

• Science

  TOET

  TOET, also known as thio-DOET or as methylthio-DOET, may refer to the following: 2-TOET (2-thio-DOET) 5-TOET (5-thio-DOET)

  8/25/2026

• Science

  TIME-ITEM

  TIME-ITEM is an ontology of Topics that describes the content of undergraduate medical education. TIME is an acronym for "Topics for Indexing Medical Education"; ITEM is an acronym for "Index de thèmes pour l’éducation médicale." Version 1.0 of the taxonomy has been released and the web application that allows users to work with it is still under development. Its developers are seeking more col

  8/25/2026

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  Science

  Sérsic profile

  The Sérsic profile (or Sérsic model or Sérsic's law) is a mathematical function that describes how the intensity I {\displaystyle I} of a galaxy varies with distance R {\displaystyle R} from its center. It is a generalization of de Vaucouleurs' law. José Luis Sérsic first published his law in 1963.

  8/25/2026

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  Table data gateway

  Table Data Gateway is a design pattern in which an object acts as a gateway to a database table. The idea is to separate the responsibility of fetching items from a database from the actual usages of those objects. Users of the gateway are then insulated from changes to the way objects are stored in the database.

  8/25/2026