source activity

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• Source-sink dynamics — is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms. Since quality is likely to vary among patches of habitat, it is important to consider how a low… …   Wikipedia

• Activity (chemistry) — In chemical thermodynamics, activity (symbol a) is a measure of the “effective concentration” of a species in a mixture, meaning that the species chemical potential depends on the activity of a real solution in the same way that it would depend… …   Wikipedia

• source — ▪ I. source source 1 [sɔːs ǁ sɔːrs] noun 1. [countable, uncountable] a thing, place, activity etc that you get something from: • They get their money from various sources. source of • Tourism in the area is a slowly growing source of revenue,… …   Financial and business terms

• source — source1 W1S2 [so:s US so:rs] n [Date: 1300 1400; : Old French; Origin: sourse, from sourdre to rise, spring out , from Latin surgere; SURGE1] 1.) a thing, place, activity etc that you get something from ▪ They get their money from various sources …   Dictionary of contemporary English

• source — 1 noun (C) 1 a thing, place, activity etc that you get something from: They get their money from various sources. (+ of): Milk is a very good source of calcium. | For me, music is a great source of enjoyment. | at source: Is your pension taxed at …   Longman dictionary of contemporary English

• Startup neutron source — RBMK reactor control rod positions at the moment of the Chernobyl disaster; blue=startup neutron sources (12), yellow=shortened control rods from the reactor bottom (32), grey=pressure tubes (1661), green=control rods (167), red=automatic control …   Wikipedia

• Nonpoint source pollution — Muddy river polluted by sediment. Photo courtesy of United States Geological Survey. Nonpoint source (NPS) pollution refers to both water and air pollution from diffuse sources. Nonpoint source water pollution affects a water body from sources… …   Wikipedia

• Intelligence Support Activity — patch Active 1981 Country United States …   Wikipedia

• Open source — This article is about the production and development model. For its application to software, see Open source software. For the form of intelligence collection management, see Open source intelligence. For other uses, see Open source… …   Wikipedia

• Scandinavian activity theory — is a derivation of Soviet Activity theory, a psychological meta theory, paradigm, or framework, with its roots in the Soviet psychologist Vygotsky s cultural historical psychology.HistoryActivity theory as it was developed by Leont ev and… …   Wikipedia

• optical activity — Physical Chem. the ability of a substance to rotate the plane of polarization of plane polarized light. [1875 80] * * * Ability of a substance to rotate the plane of polarization of a beam of light passed through it, either as crystals or in… …   Universalium