- 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.
Materials whose principal purpose is to retard the flow of heat. Thermal- or heat-insulation materials may be divided into two classes, bulk insulations and reflective insulations. The class and the material within a class to be used for a given application depend upon such factors as temperature of operation, ambient conditions, mechanical strength requirements, and economics.
Industry:Science
Seasonal affective disorder (SAD), or winter depression, was first described in a 1984 National Institute of Mental Health (NIMH) study. Researchers at NIMH and, soon after, at other research centers (including Fairbanks, New York, and Basel) cataloged for the first time a syndrome of annually repeating depressive symptoms that were refractive to bright artificial light exposure.
Industry:Science
Intrinsic properties of atomic nuclei; electric moments result from deviations of the nuclear charge distribution from spherical symmetry; magnetic moments are a consequence of the intrinsic spin and the rotational motion of nucleons within the nucleus. The classical definitions of the magnetic and electric multipole moments are written in general in terms of multipole expansions.
Industry:Science
Members of the Picornaviridae family, genus <i>Enterovirus</i>. The name is derived from the term enteric cytopathogenic human orphan virus. More than 34 antigenic types exist. Only certain types have been associated with human illnesses, particularly with aseptic meningitis and febrile disease, with or without rash. Their epidemiology is similar to that of other enteroviruses.
Industry:Science
Rising global temperatures and the related changes in climate patterns are causing impacts around the globe. Recent observations have documented unprecedented rates of glacier retreat, earlier blossoming of flowers in spring, earlier arrival of migrating birds, reduced winter snowpack, earlier arrival of snowmelt in montane river basins, and dozens of other warming-related impacts.
Industry:Science
Robotic controlled drilling significantly reduces oil and natural gas well construction costs. It increases production by directing the wellbore and its exposure to the hydrocarbon reservoir (pay zone), where oil or gas migrates, or is forced, into the wellbore for transport to the surface. The greater the wellbore exposure to the pay zone, the greater the production from each well.
Industry:Science
In physics, the requirement that interactions in any space-time region can influence the evolution of the system only at subsequent times; that is, past events are causes of future events, and future events can never be the causes of events in the past. Causality thus depends on time orientability, the possibility of distinguishing past from future. Not all spacetimes are orientable.
Industry:Science
Machines that take discrete components as come into an assembly department and bring them together so as to produce a configuration of some practical value. Such machines differ from packaging machinery in two ways: in assembly machinery, components must be inserted in specific sequence and spatial attitude; and they must often be tested functionally as part of the assembly process.
Industry:Science
Processes in which oxygen is caused to combine with other molecules. The oxygen may be used as elemental oxygen, as in air, or in the form of an oxygen-containing molecule which is capable of giving up all or part of its oxygen. Oxidation in its broadest sense, that is, an increase in positive valence or removal of electrons, is not considered here if oxygen itself is not involved.
Industry:Science
Schemes for locating points in a given space by means of numerical quantities specified with respect to some frame of reference. These quantities are the coordinates of a point. To each set of coordinates there corresponds just one point in any coordinate system, but there are useful coordinate systems in which to a given point there may correspond more than one set of coordinates.
Industry:Science
