- 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 placental mammal order Carnivora encompasses many charismatic taxa, including dogs and cats, bears, raccoons, weasels, hyenas, civets, mongooses, seals, sea lions, and walruses. With over 260 living species, Carnivora is one of the most species-rich and ecologically diverse groups of mammals. Despite their name, carnivorans range in diet from pure carnivores to species that specialize on fruit, leaves, and insects, as well as the full spectrum of mixed diets. Carnivorans also display a broad range in styles of locomotion, from the fastest land animal, the cheetah, to climbing, burrowing, and aquatic species.
Industry:Science
The procedures and techniques utilized during construction. Construction operations are generally classified according to specialized fields. These include preparation of the project site, earthmoving, foundation treatment, steel erection, concrete placement, asphalt paving, and electrical and mechanical installations. Procedures for each of these fields are generally the same, even when applied to different projects, such as buildings, dams, or airports. However, the relative importance of each field is not the same in all cases. For a description of tunnel construction, which involves different procedures,
Industry:Science
The name first applied in 1897 by Ernest Rutherford to one of the forms of radiation emitted by radioactive nuclei. Beta particles can occur with either negative or positive charge (denoted β<sup>−</sup> or β<sup>+</sup>) and are now known to be either electrons or positrons, respectively. Electrons and positrons are now referred to as beta particles only if they are known to have originated from nuclear beta decay. Their observed kinetic energies range from zero up to about 5 MeV in the case of naturally occurring radioactive isotopes, but can reach values well over 10 MeV for some artificially produced isotopes.
Industry:Science
The resurgence of interest in hydroexcavation—the use of high-pressure waterjets for cutting and removing material—involves new areas of development that have taken it a long way from its original use. While hydroexcavation was first used for bulk material removal, a combination of mechanical and waterjetting tools followed, and recently waterjets have been used for localized fragmentation in drilling and rock slotting applications. Rock slotting is the practice of cutting a channel in rock, generally to provide a free surface that the rock can be broken into, or to isolate a mass of rock that can then be removed.
Industry:Science
The localized application of color on fabrics. In printing textiles, a thick paste of dye or pigment is applied to the fabric by appropriate mechanical means to form a design. The color is then fixed or transferred from the paste to the fiber itself, maintaining the sharpness and integrity of the design. In a multicolor design, each color must be applied separately and in proper position relative to all other colors. Printing is one of the most complex of all textile operations, because of the number of variables and the need for a high degree of precision, particularly since there is no way to correct a bad print.
Industry:Science
The name given to the siliceous iron formation from which the high-grade iron ores of the Lake Superior district have been derived. It consists chiefly of fine-grained silica mixed with magnetite and hematite. As the richer iron ores approach exhaustion in the United States, taconite becomes more important as a source of iron. To recover the ore mineral in a usable form for the production of iron, taconite must be finely ground, and the magnetite or hematite concentrated by a magnetic or other process. Finally, the concentrate must be agglomerated into chunks of size and strength suitable for the blast furnace.
Industry:Science
The most fundamental entity in nature is the pointlike particle. All microscopic phenomena known today are explained by interactions among several kinds of particles. When the interactions are weak it is possible to make quantitative predictions by direct methods, but when they are strong it is necessary to revert to lattice models that can be simulated on the computer. Recently a way was discovered to incorporate chirality, a fundamental property of particles, into lattice models. This development extended vastly the reach of lattice models and may even expose the mechanism by which chirality is realized in nature.
Industry:Science
The natural fiber obtained from the Cashmere goat, native to the Himalayan region of China and India. The fleece of this goat has long, straight, coarse outer hair of little value; but the small quantity of underhair, or down, is made into luxuriously soft woollike yarns with a characteristic highly napped finish. This fine cashmere fiber is obtained by frequent combings during the shedding season. A microscopic examination reveals that cashmere is a much finer fiber than mohair or wool fiber obtained from sheep. The scales being less distinct and farther apart, the fiber appears to be made of telescoped sections.
Industry:Science
The processes of producing multiple copies of maps or map drawings. Reproductions are obtained by a number of procedures, including inked-plate printing, photographic processes, office copying equipment, and computers. Choosing a process depends on the use of the map, quality and quantity desired, cost, and availability of equipment. The reproduction process governs the techniques and media for preparing the original artwork. Some processes serve as intermediate stages in map reproduction. Finished reproductions can be on any material, but film and paper are most commonly used and are single color or multicolor.
Industry:Science
The process of measurement consists in finding out how many times the quantity to be measured contains a fixed quantity of the same kind, called a unit. The definitions of the units often involve complex physical theory and do not lend themselves readily to practical realization. The concrete representations of units are known as measurement standards. In practice, measurements are made by using an instrument calibrated against a local reference standard, which itself has been calibrated either directly or by several links in a traceability chain against the national standard held by the national standards laboratory.
Industry:Science
