- 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.
An “altered reaction” to a food substance to which people typically do not react. Although the term “allergy” is sometimes used loosely for many different kinds of response, strictly speaking it refers to an immunological response mediated by the IgE class of immunoglobulins, or antibodies.
Industry:Science
An abnormal accumulation of fluid in the cells, tissue spaces, or cavities of the body, also known as dropsy. An excess of fluid in the pleural spaces is referred to as hydrothorax, in the pericardial sac as hydropericardium, and in the peritoneal cavity as ascites. Anasarca is a generalized subcutaneous edema.
Industry:Science
An abnormal condition (including an arc) of relatively low impedance, whether made accidentally or intentionally, between two points of different potential in an electric network or system.
Industry:Science
An abrupt increase of depth in a free-surface liquid flow. A hydraulic jump is characterized by rapid flow and small depths on the upstream side, and by larger depths and smaller velocities on the downstream side. A jump can form only when the upstream flow is supercritical, that is, when the fluid velocity is greater than the propagation velocity <i>c</i> of a small, shallow-water gravity wave (<i>c</i> = √<span style="border-top:1px solid black;"><i>g</i><i>h</i></span>, where <i>h</i> is the depth). A considerable amount of energy is dissipated in the conversion from supercritical to subcritical flow.
Industry:Science
An abrupt, heritable change in genes or chromosomes manifested by changes in the phenotype (the appearance) of an organism. It is theoretically preferable to define mutations as changes in deoxyribonucleic acid (DNA) sequences, but the classical definition remains the operational definition in most circumstances. Genetic segregation and recombination, however, are not mutational processes unless aberrant.
Industry:Science
An abrupt, high-current electric discharge that occurs in the atmospheres of the Earth and other planets and that has a path length ranging from hundreds of feet to tens of miles. Lightning occurs in thunderstorms because vertical air motions and interactions between cloud particles cause a separation of positive and negative charges.
Industry:Science
An absolute pressure gage which is specifically designed to measure atmospheric pressure. This instrument is a type of manometer with one leg at zero pressure absolute.
Industry:Science
An abstract notion of great power and beauty, which has been central to the development of mathematical analysis and forms the backdrop for many applications of analysis to science and engineering. Its essence lies in the fact that the objects of primary interest in analysis (namely, functions) enjoy geometrical properties which are in important ways analogous to the geometry of physical space. Thus the highly developed human visual and spatial intuition can lead to significant truths about functions.
Industry:Science
An acceleration which arises as a result of motion of a particle relative to a rotating system. Only the components of motion in a plane parallel to the equatorial plane are influenced. Coriolis accelerations are important to the circulation of planetary atmospheres, and also in ballistics. They are so called after G. de Coriolis, the French engineer and mathematician whose analysis of the phenomenon was published in 1835.
Industry:Science
An accepted reference sample which is used for establishing a unit for the measurement of physical quantities. A physical quantity is specified by a numerical factor and a unit; for example, a mass might be expressed as 8 g, a length as 6 cm, and a time interval as 2 min. Here the gram is a mass unit defined in terms of the international kilogram, which serves as the primary standard of mass. The centimeter is defined in terms of the international meter, which is the primary standard of length and is defined as the length of path traveled by light in a vacuum during a time interval of 1/299 792 458 of a second. In similar fashion, the minute is a time interval defined as 60 s, where the second is the international standard of time and is defined as the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine energy levels of the ground state of the cesium-133 atom.
Industry:Science
