All articles starting with S
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SignalWire
SignalWire is an American cloud communications company founded in 2017 in Palo Alto by the developers of FreeSWITCH, offering programmable voice, video, messaging, and AI agents.
Signata
Signata (†Signata Dante & Frizzell, 1965) is an extinct fossil cusk-eel (Ophidiidae) genus known from Eocene otoliths of the US Gulf Coastal Plain, with two species, S. stenzeli and S. nicoli; not to be confused with unrelated species named signata.
Signature
Signature: a mark, name, or electronic act executed with intent to authenticate a document. Covers its legal function, historical forms from seals to autopen, and electronic signature law under E-SIGN and eIDAS.
Signature (logic)
In mathematical logic, a signature, also called a vocabulary or language, is the collection of constant, function, and relation symbols, with their arities, for building first-order formulas.
Signature Bank
Signature Bank was a New York State-chartered commercial bank with $110.4 billion in assets, closed by regulators on March 12, 2023 after a deposit run.
Signature scheme
A signature scheme is a cryptographic method of three algorithms, key generation, signing, and verification, giving authentication, integrity, and non-repudiation; RSA was the first practical scheme, published in 1978.
Signature verification
Signature verification is the process of deciding whether a signature is genuine or forged, done by forensic document examiners and by automated biometric systems used in banking.
Signature, ratification and entry into force of United Nations General Assembly treaties
Signature, ratification, and entry into force of United Nations General Assembly treaties describes how GA treaties become binding: signature, ratification or accession, entry-into-force thresholds, and depositary functions.
Signatures: An Anthology of Philippine Poetry in English
Signatures is a 1955 anthology of Philippine poetry in English, published in Manila and associated with the writers Alejandrino G. Hufana and R. V. Diaz.
Signavio
Signavio is a Berlin-based business process management and process mining software vendor, owned by SAP since 2021 and sold as the SAP Signavio Process Transformation Suite.
Signcryption
Signcryption is a public-key cryptographic method that performs digital signature and encryption in a single logical step, introduced by Yuliang Zheng in 1997 and cheaper than signing and encrypting separately.
Signe Munk
Signe Munk is a Danish Socialist People's Party politician who has been deputy leader since 2014 and Minister for Cities, Rural Areas and Transport since 2026.
Signe Toly Anderson
Signe Toly Anderson (1941–2016), American singer, original female vocalist of Jefferson Airplane 1965–66; sang on Jefferson Airplane Takes Off, left October 1966, replaced by Grace Slick.
Signed but unratified treaties
Signed but unratified treaties are international agreements a state has signed subject to ratification but not yet approved domestically, so signature does not bind it as a party.
Signed distance function
A signed distance function (SDF) returns, for each point in space, the distance to the nearest surface of a shape, negative inside and positive outside by convention.
Signed number representations
Signed number representations, also known as signed integer representations, are conventions for encoding positive and negative integers as binary bits, with two's complement dominating modern hardware.
Signed zero
Signed zero is the property of floating-point systems, notably IEEE 754, of representing zero as +0 and −0, which compare equal but behave differently in division.
Signetics
Signetics was an American semiconductor company founded in 1961 in Mountain View, California, the first company established to design integrated circuits and the original producer of the 555 timer.
Significance analysis of microarrays
Significance analysis of microarrays (SAM) is a permutation-based statistical method introduced by Tusher, Tibshirani, and Chu in 2001 that identifies differentially expressed genes in microarray experiments while estimating the false discovery rate.
Significance arithmetic
Significance arithmetic is a form of computer arithmetic for approximate quantities that propagates errors through each operation and reports only reliable digits; it underlies Mathematica's arbitrary-precision arithmetic.
Significance of numbers in Judaism
The significance of numbers in Judaism covers symbolic numbers like seven, twelve, and 40, plus gematria, which gives Hebrew letters numerical values, making 18 the value of chai, or life.
Significant figures
Significant figures, also called significant digits or sig figs, are the digits in a reported numerical value that carry meaningful information, showing the precision a measurement actually supports.
Significant other
Significant other (SO): a gender-neutral term for a spouse or long-term romantic partner that presumes nothing about marital status or orientation; in sociology and psychology it instead means anyone, such as a parent or peer, who strongly shapes a person's self-concept.
Significant Other (album)
Significant Other is Limp Bizkit's second studio album, released June 22, 1999 on Interscope. Produced by Terry Date, it debuted at number one on the Billboard 200, sold 640,000 copies in its first week, and features Nookie, Break Stuff, and Re-Arranged.
Significant Other (film)
Significant Other is a 2022 American sci-fi horror thriller by Dan Berk and Robert Olsen, starring Maika Monroe and Jake Lacy as a couple whose Pacific Northwest backpacking trip meets a shapeshifting alien; it premiered October 7, 2022 on Paramount+.
Significant wave height
Significant wave height (Hs, also SWH) is the mean height of the highest one third of waves, the standard measure of sea state in forecasts and offshore engineering.
Signified and signifier
Signified and signifier: the two components of Ferdinand de Saussure's linguistic sign from the Cours de linguistique générale (1916), the signifier being the sound-image and the signified the concept, joined arbitrarily and contrasted with Peirce's triadic model.
Signify (company)
Signify, known as Philips Lighting until May 2018, is a Dutch lighting company headquartered in Eindhoven, the world's largest lighting maker, whose brands include Philips Hue and WiZ.
Signilskär-Märket Archipelago
Signilskär-Märket Archipelago, Ramsar site no. 5 in Åland, Finland, designated 1974: about 50 treeless islands near the Swedish border, rich birdlife, a 1927 bird-banding station, grey seals at Märket, and oil pollution as the main threat.
Signing of the United States Declaration of Independence
Signing of the Declaration of Independence: 56 Second Continental Congress delegates signed the engrossed parchment beginning August 2, 1776, not July 4; John Hancock signed first, arranged by state from New Hampshire to Georgia.