effective+principle
81Rio Declaration on Environment and Development — The Rio Declaration on Environment and Development, often shortened to Rio Declaration, was a short document produced at the 1992 United Nations Conference on Environment and Development (UNCED), informally known as the Earth Summit. The Rio… …
82keyboard instrument — ▪ music Introduction any musical instrument on which different notes can be sounded by pressing a series of keys, push buttons, or parallel levers. In nearly all cases in Western music the keys correspond to consecutive notes in the… …
83White dwarf — For other uses, see White dwarf (disambiguation). Image of Sirius A and Sirius B taken by the Hubble Space Telescope. Sirius B, which is a white dwarf, can be seen as a faint pinprick of light to the lower left of the much brighter Sirius A …
84René Guénon — Infobox Philosopher region = Western Eastern philosophies esotericisms era = 20th century philosophy color = lightsteelblue image size = 250px image caption = A 1925 studio photo portrait (age age|1886|11|15|1925|7|1). name = René Jean Marie… …
85Laborem Exercens — was an encyclical written by Pope John Paul II in 1981, on human work. It is part of a larger body of writings known as Catholic social teaching, that trace their origin to Rerum Novarum which was issued by Pope Leo XIII in 1891.External links*… …
86Netherlands, The — officially Kingdom of The Netherlands byname Holland Country, northwestern Europe. Area: 16,033 sq mi (41,526 sq km). Population (2002 est.): 16,142,000. Capital: Amsterdam; Seat of Government: The Hague. Most of the people are Dutch. Languages:… …
87General relativity — For a generally accessible and less technical introduction to the topic, see Introduction to general relativity. General relativity Introduction Mathematical formulation Resources …
88Techniques for creating a User Centered Design — Techniques for creating a web based User Centered DesignA User centered design (UCD) is a philosophy and a process. It is a philosophy that places the person (as opposed to the thing ) at the center; it is a process that focuses on cognitive… …
89small arm — small armed, adj. Usually, small arms. a firearm designed to be held in one or both hands while being fired: in the U.S. the term is applied to weapons of a caliber of up to one in. (2.5 cm). [1680 90] * * * ▪ military technology Introduction… …
90military technology — Introduction range of weapons, equipment, structures, and vehicles used specifically for the purpose of fighting. It includes the knowledge required to construct such technology, to employ it in combat, and to repair and replenish it.… …
