aggregate+of+phenomena
51Aurora (astronomy) — Aurora Borealis redirects here. For other uses, see Aurora Borealis (disambiguation). Aurora Australis redirects here. For the ship, see Aurora Australis (icebreaker). For the book, see Aurora Australis (book). Northern lights redirects here. For …
52Naturalism — • Philosophical tendency that consists essentially in looking upon nature as the one original and fundamental source of all that exists, and in attempting to explain everything in terms of nature. Catholic Encyclopedia. Kevin Knight. 2006.… …
53Supply and demand — For other uses, see Supply and demand (disambiguation). The price P of a product is determined by a balance between production at each price (supply S) and the desires of those with purchasing power at each price (demand D). The diagram shows a… …
54John Maynard Keynes — Keynes redirects here. For other uses, see Keynes (disambiguation). John Maynard Keynes Keynesian economics John Maynard Keynes Born …
55Concrete degradation — may have various causes. Concrete can be damaged by fire, aggregate expansion, sea water effects, bacterial corrosion, calcium leaching, physical damage and chemical damage (from carbonation, chlorides, sulfates and distilled water). This process …
56global warming — an increase in the earth s average atmospheric temperature that causes corresponding changes in climate and that may result from the greenhouse effect. [1975 80] * * * Potential increase in global average surface temperatures resulting from… …
57Aristotle — • Philosopher, born at Stagira, a Grecian colony in the Thracian peninsula Chalcidice, 384 B.C.; died at Chalcis, in Euboea, 322 B.C Catholic Encyclopedia. Kevin Knight. 2006. Aristotle Aristotle …
58Say's law — In economics, Say’s Law or Say’s Law of Markets is a principle attributed to French businessman and economist Jean Baptiste Say (1767 1832) stating that there can be no demand without supply. A central element of Say s Law is that recession does… …
59Models of collaborative tagging — Many have argued that social tagging or collaborative tagging systems can provide navigational cues or “way finders” [1][2] for other users to explore information. The notion is that, given that social tags are labels that users create to… …
60Theoretical ecology — Mathematical models developed in theoretical ecology predict complex food webs are less stable than simple webs.[1]:75–77[2]:64 …
