- 行业: Printing & publishing
- Number of terms: 178089
- Number of blossaries: 0
- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
The periodic fluctuations in global temperatures and precipitation, such as the glacial (cold) and interglacial (warm) cycles of the Pleistocene (a geological period from 1.8 million to 10,000 years ago). Presently, the increase in global temperatures since 1900 is of great interest. Many atmospheric scientists and meteorologists believe it is linked to human-produced carbon dioxide (CO<sub>2</sub>) in the atmosphere.
Industry:Science
The measurement of the energetics of biological processes such as biochemical reactions, association of ligands to biological macromolecules, folding of proteins into their native conformations, phase transitions in biomembranes, and enzymatic reactions, among others. Two different types of instruments have been developed to study these processes: differential scanning calorimeters and isothermal titration calorimeters.
Industry:Science
The potential which is produced when a liquid is forced to flow through a capillary or a porous solid. G. H. Quincke (1859) found that the electromotive force produced by the streaming of pure water under a given pressure through a clay plate is independent of the size and thickness of the diaphragm and of the amount of water forced through the diaphragm; the electromotive force is, however, proportional to the pressure.
Industry:Science
The oral or buccal cavity and its related structures. The oral cavity forms in the embryo from an in-pocketing of the skin, the stomodeum; it is thus lined by ectoderm and is not, properly speaking, part of the digestive tract. Functionally, however, the mouth forms the first portion of both the digestive and respiratory systems. Various special structures are found in, or associated with, the mouths of most vertebrates.
Industry:Science
The subfield of computer science concerned with understanding the nature of intelligence and constructing computer systems capable of intelligent behavior. Many activities, such as perception, learning, planning, natural language, and understanding, involve intelligent behavior and include an immense diversity of phenomena. Fields such as psychology, linguistics, and philosophy share scientific concern for these phenomena.
Industry:Science
The phenomenon of bioluminescence—visible light emitted by organisms—is rare on land compared with its diverse manifestations in the oceans. Most of the terrestrial representatives are insects, followed by bioluminescent fungi and a few earthworms, millipedes, centipedes, and snails. Beetles (Coleoptera) make up the majority of the bioluminescent insects, with more than 2000 reported species, mostly tropical in distribution.
Industry:Science
The point in the sky directly above an observer. If the observer is at a pole, then the observer's zenith is a celestial pole; but for observers at midlatitudes the zenith is a point in the sky that corresponds to a changing right ascension but a constant declination as the sky rotates overhead. The point directly below the observer is the observer's nadir, and is 180° in longitude and in latitude from the observer's zenith.
Industry:Science
The ratio of the fuel mass flow of an aircraft engine to its output power, in specified units. Specific fuel consumption (abbreviated sfc or SFC) is a widely used measure of atmospheric engine performance. For reciprocating engines it is usually given in U.S. Customary units of pound-mass per hour per horsepower ((lbm/h)/hp or lbm/(hp·h)), and International System (SI) units of kilograms per hour per kilowatt ((kg/h)/kW).
Industry:Science
The only order of the superorder Polymixiomorpha, comprising one family (Polymixiidae) with one genus (<i>Polymixia</i>) and ten extant species. Several fossil genera are known from the Upper Cretaceous. Polymixiidae was originally placed with the Beryciformes; however, recent evidence suggests that the family may be the sister group to all other acanthomorphs (spiny-rayed fishes). The family is known commonly as beardfishes.
Industry:Science
The reheating of previously quenched alloy to a predetermined temperature below the critical range, holding the alloy for a specified time at that temperature, and then cooling it at a controlled rate, usually by immediate rapid quenching, to room temperature. Tempering has a long history, beginning as an empirical process to impart toughness. Consequently, the term is broadly applied to any process that toughens a material.
Industry:Science
