- 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.
A product obtained from the licorice plant (<i>Glycyrrhiza glabra</i>) of the legume family (Leguminosae). It is a perennial herb which grows wild and is cultivated in southern Europe and in western and central Asia. The roots are dried for several months and then packaged for shipment. Spain leads in the production of cultivated licorice roots. Licorice is used in medicine to mask objectionable taste and as a laxative; as a flavoring material in the brewing, tobacco, and candy industries; and in the manufacture of shoe polish.
Industry:Science
A product of petroleum gases, principally propane and butane, which must be stored under pressure to keep it in a liquid state. At atmospheric pressure and above freezing temperature, these substances would be gases. Large quantities of propane and butane are now available from the gas and petroleum industries. These are often employed as fuel for tractors, trucks, and buses and mainly as a domestic fuel in remote areas. Because of the low boiling point (−47 to 32°F or −44 to 0°C) and high vapor pressure of these gases, their handling as liquids in pressure cylinders is necessary. Owing to demand from industry for butane derivations, LPG sold as fuel is made up largely of propane.
Industry:Science
A production technique for shaping and finishing metal. In the spinning of metal, a sheet is rotated and worked by a round-ended tool, controlled manually or mechanically. The sheet is formed over a mandrel.
Industry:Science
A professional activity that utilizes processes and procedures from systems engineering, systems management, and product development for the purpose of developing large-scale complex systems. These complex systems involve hardware and software and may be based on existing or legacy systems coupled with totally new requirements to add significant functionality through integration of new systems or subsystems. Systems integration generally involves combining products of several contractors to produce the working system. Systems integration applications range from creation of complex inventory tracking systems to designing flight simulation models and reengineering large logistics systems.
Industry:Science
A program in quantum field theory consisting of a set of rules for calculating S-matrix amplitudes which are free of ultraviolet (or short-distance) divergences, order by order in perturbative calculations in an expansion with respect to coupling constants.
Industry:Science
A progressive degenerative disorder of the nervous system belonging to a group of conditions called motor system disorders. Parkinson's disease typically begins in middle age with an average age of onset of 59 years, but it can also begin in the 30s or 40s as well as in the 70s or later. Males are affected slightly more commonly than females; all ethnic groups can develop the disease, with Caucasians at somewhat higher risk. Parkinson's disease results in the loss of brain cells that produce dopamine. The cause is unknown, but, increasingly, specific environmental and genetic factors are being evaluated for their role in the disease. Typically Parkinson's disease is sporadic, but it can occur in familial clusters; and research on some of these families has resulted in the discovery of a few genetic mutations. To date, however, genetic testing is not usually performed due to the low chance of finding a genetic cause for an affected individual.
Industry:Science
A prominently located constellation in the northern sky (see <b>illustration</b>), named for the daughter of Cassiopeia in Greek mythology: When Cassiopeia bragged that her daughter Andromeda was more beautiful than Poseidon's daughters, the Nereids, Poseidon created Cetus, the sea monster. (In some versions of the myth, Cassiopeia boasted of her own beauty.) The situation required Andromeda's sacrifice. However, Perseus saved Andromeda by showing Cetus the head of Medusa, turning Cetus to stone.
Industry:Science
A pronounced change in both the internal and external morphology of an animal that takes place in a short amount of time, triggered by some combination of external and internal cues. The extent of morphological change varies considerably among species. Even when morphological changes are relatively slight, metamorphosis typically brings about a pronounced shift in habitat and lifestyle. Consider, for example, the transformation of a sluggish leaf-eating caterpillar into a nectar-drinking flying butterfly; or of a nonfeeding but free-swimming microscopic larva in a bivalved shell into a suspension-feeding sedentary barnacle; or of an aquatic suspension-feeding tailed tadpole larva into a carnivorous semiterrestrial frog or toad. In many species, metamorphosis is truly a morphological, ecological, and physiological revolution. The precise morphological, physiological, and biochemical changes that constitute metamorphosis; the neural, hormonal, and genetic mechanisms through which those changes are controlled; and the ecological consequences of those changes and when they take place continue to be studied in a wide variety of animals. The hormonal and genetic control of metamorphosis has been best examined in a few species of insect, amphibian, and fish (such as flounder), but other aspects of metamorphosis have been investigated for other insect, amphibian, and fish species as well as for crabs, barnacles, gastropods, bivalves, bryozoans, echinoderms, sea squirts—indeed, representatives of essentially every animal phylum.
Industry:Science
A propelled and steered aerial vehicle, dependent on the displacement of air by a lighter gas for lift. An airship, or dirigible balloon, is composed primarily of a streamlined hull, usually a prolate ellipsoid which contains one or more gas cells, fixed and movable tail surfaces for control, a car or cabin for the crew or passengers, and a propulsion system.
Industry:Science
A propeller or multibladed fan inside a coaxial duct or cowling, also called a ducted propeller or a shrouded propeller, although in a shrouded propeller the ring is usually attached to the propeller tips and rotates. The duct serves to protect the fan blades from adjacent objects and to protect objects from the revolving blades, but more importantly, the duct prevents radial flow of the fluid at the blade tips. Fan efficiency remains high over a wider speed range with a properly shaped duct than without. However, fan efficiency is sensitive to duct shape at off-center design conditions. Without a well-rounded inlet lip and a variable-area exit, off-center performance may be worse than without the duct.
Industry:Science
