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What (who) is Sigma-7 - definition
WIKIMEDIA DISAMBIGUATION PAGE
Sigma 7 (disambiguation)
Sigma receptor
CLASS OF CELL SURFACE RECEPTORS RECOGNIZED BY ITS PHARMACOLOGICAL PROFILE
Sigmaergics; Sigmaergic; Sigmamimetic; Sigmamimetics; Sigma agonist; Sigma antagonist; Sigma receptors
Sigma receptors (σ-receptors) are protein cell surface receptors that bind ligands such as 4-PPBP (4-phenyl-1-(4-phenylbutyl) piperidine), SA 4503 (cutamesine), ditolylguanidine, dimethyltryptamine, and siramesine. There are two subtypes, sigma-1 receptors (σ1) and sigma-2 receptors (σ2), which are classified as sigma receptors for their pharmacological similarities, even though they are evolutionarily unrelated.
Sigma SD1
DIGITAL CAMERA MODEL
Sigma SD1 Merrill
The Sigma SD1 is a digital SLR camera produced by the Sigma Corporation of Japan. The camera uses a Foveon X3 sensor, which comprises 3 layers of 4800 x 3200 pixels (46 megapixels), giving much higher chromatic resolution than the equivalent Bayer array.
Σ-algebra
ALGEBRIC STRUCTURE CLOSED IN RESPECT TO NUMERABLE UNION, INTERSECTION AND COMPLEMENT.
Sigma-algebras; Separable sigma algebra; Probability measure space; Sigma field; Sigma-field; Sigma homomorphism; S-algebra; Sigma algebra; Join (sigma algebra); Refinement (sigma algebra); Separable measure space; Product σ-algebra; Σ-field; Product sigma-algebra; Generated σ-algebra (by sets); Lebesgue sigma-algebra; Separable σ-algebra; Sigma-algebra
In mathematical analysis and in probability theory, a σ-algebra (also σ-field) on a set X is a nonempty collection Σ of subsets of X closed under complement, countable unions, and countable intersections. The pair (X, Σ) is called a measurable space.
Wikipedia
Sigma 7
Sigma 7 may refer to:
- the callsign of the spacecraft used in the 1962 Mercury-Atlas 8 mission
- the SDS Sigma 7 computer, made by Scientific Data Systems (SDS), later known as Xerox Data Systems (XDS)
- Sigma Seven, a Japanese company
- Sigma 7 (video game), 1987 computer game by Durell Software
- Sigma 7 AC servo drive series from Yaskawa Electric Corporation
Examples of use of Sigma-7
1. Schirra blasted off from Cape Canaveral on Oct. 3, 1'62, aboard the Sigma 7 Mercury spacecraft.
2. Schirra blasted off from Cape Canaveral on Oct. 3, 1'62, aboard the Sigma 7 Mercury spacecraft. I‘m having a ball up here drifting,‘‘ Schirra said from space before making a perfect splashdown in the Pacific Ocean.