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The Oregon Museum of Science and Industry (OMSI, / ˈɒmziː / OM-zee) is a science and technology museum in Portland, Oregon, United States. It contains three auditoriums, including a large-screen theatre, planetarium, and exhibition halls with a variety of hands-on permanent exhibits focused on natural sciences, industry, and technology.
USS. Blueback. (SS-581) USS Blueback (SS-581) is a Barbel -class submarine that served in the United States Navy from 1959 to 1990, and subsequently was made into an exhibit at the Oregon Museum of Science and Industry. She was the second Navy submarine to bear the name. Blueback was laid down by Ingalls Shipbuilding Corporation of Pascagoula ...
Amateur radio international reciprocal operating agreements permit amateur radio operators (hams) from one country to operate a station whilst traveling in another without the need to obtain additional licenses or permits. When no agreement exists between countries, amateur radio operators are often required to apply for a reciprocal operating ...
The reciprocals of prime numbers have been of interest to mathematicians for various reasons. They do not have a finite sum, as Leonhard Euler proved in 1737. Like rational numbers, the reciprocals of primes have repeating decimal representations. In his later years, George Salmon (1819–1904) concerned himself with the repeating periods of ...
Many of these protocols are originally based on the Internet Protocol Suite (TCP/IP) and other models and they often do not fit neatly into OSI layers. 7. Application layer. 6. Presentation layer. 5. Session layer. 4. Transport layer.
The World Forum for Harmonization of Vehicle Regulations is a working party (WP.29) [1] of the Inland Transport Committee (ITC) of the United Nations Economic Commission for Europe (UNECE). Its responsibility is to manage the multilateral Agreements signed in 1958, 1997 and 1998 concerning the technical prescriptions for the construction ...
The Australasian shoveler (Spatula rhynchotis) is a species of dabbling duck in the family Anatidae. It is native to southwestern and southeastern Australia, including Tasmania, and New Zealand. It ranges in length from 46 to 53 centimetres (18 to 21 inches) and lives in heavily vegetated swamps. This male Australasian shoveler was photographed ...
The reciprocal lattice is a term associated with solids with translational symmetry, and plays a major role in many areas such as X-ray and electron diffraction as well as the energies of electrons in a solid. It emerges from the Fourier transform of the lattice associated with the arrangement of the atoms. The direct lattice or real lattice is ...