- 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 functions associated with managing the information assets of an enterprise, typically a corporation or government organization. Increasingly, companies are taking the view that information is an asset of the enterprise in much the same way that a company's financial resources, capital equipment, and real estate are assets. Properly employed, assets create additional value with a measurable return on investment. Forward-looking companies carry this view a step further, considering information as a strategic asset that can be leveraged into a competitive advantage in the markets served by the company.
Industry:Science
The existence of different crystal structures with the same chemical composition. If only one chemical element is present, the forms are called allotropes. Graphite and diamond are allotropes of carbon, whereas quartz and cristobalite are polymorphs of silica (silicon dioxide, SiO<sub>2</sub>). Although properties are different in these forms, reversible transformations, which involve small shifts in atom positions and no bulk transport of material, are common. The quartz transformation at 1063°F (573°C) is a reversible, atom-displacement transformation.
Industry:Science
Supercapacitors are energy storage devices. They are charged from an external power source, such as a wall socket, and store the energy for later use. As an energy storage system, they are compatible with alternative, or clean, energy sources, such as windmills or solar panels. For example, a supercapacitor may collect and store the energy produced by solar panels during the day and provide back this energy at night. Supercapacitors are also called electrochemical capacitors and ultracapacitors. In certain cases, they may be called double-layer capacitors.
Industry:Science
Standard oil recovery methods typically extract only one-third of the oil originally present in a reservoir. The physical reasons for this have driven the development of many chemical processes to enhance recovery. Most of these methods rely on relatively expensive additives, making field implementation economically unattractive. Introducing microbes into the reservoir in order to produce recovery-enhancing chemicals in situ could reduce costs, but taking advantage of this potential requires great improvements over the current performance of microbial systems.
Industry:Science
The attempt to reconcile the counterintuitive features of quantum mechanics with the hypothesis that it is in principle a complete description of the physical world, even at the level of everyday objects. A paradox arises because, at the atomic level where the quantum formalism has been directly tested, the most natural interpretation implies that where two or more different outcomes are possible it is not necessarily true that one or the other is actually realized, whereas at the everyday level such a state of affairs seems to conflict with direct experience.
Industry:Science
The band of sky through which the Sun, Moon, and planets apparently move in the course of the year. The Babylonians, about 2500 years ago, divided the zodiac into 12 parts, which correspond to constellations. These zodiacal constellations, in order around the sky, are Aries, the Ram; Taurus, the Bull; Gemini, the Twins; Cancer, the Crab; Leo, the Lion; Virgo, the Virgin; Libra, the Scales; Scorpius, the Scorpion; Sagittarius, the Archer, Capricornus, the Sea Goat; Aquarius, the Water Carrier; and Pisces, the Fish. These constellations are based on Greek myths.
Industry:Science
The heaviest isotope of the element hydrogen and the only one which is radioactive. Tritium occurs in very small amounts in nature but is generally prepared artificially by processes known as nuclear transmutations. It is widely used as a tracer in chemical and biological research and is a component of the so-called thermonuclear or hydrogen bomb. It is commonly represented by the symbol <sup>3</sup><sub>1</sub>H, indicating that it has an atomic number of 1 and an atomic mass of 3, or by the special symbol T. For information about the other hydrogen isotopes.
Industry:Science
Strategic management of contemporary enterprises, whether they are in the private or public sectors, poses numerous challenges. Growing an enterprise's market or community impact perhaps reflected in increased sales and profits or services to constituencies, is a continual challenge. Evolving the enterprise's value proposition (that is, the value of what it offers consumers), the foundation for growth, is also an important challenge. Associated challenges include achieving focus, implementing change, addressing uncertainty, sharing knowledge, and managing time.
Industry:Science
The interaction of two (or more) organisms (or species) such that, for each, the birth or growth rates are depressed and the death rate increased by the presence of the other organisms (or species). Competition is recognized as one of the more important forces structuring ecological communities, and interest in competition led to one of the first axioms of modern ecology, the competitive exclusion principle. The principle suggests that in situations where the growth and reproduction of two species are resource-limited, only one species can survive per resource.
Industry:Science
The largest class of the division Bryophyta, the true mosses. Members of the class are best characterized by operculate capsules and a peristome that aids in the dispersal of spores, and are generally perennial. The class consists of about 14,000 species distributed in six subclasses based primarily on the structure and developmental history of the sporophyte and especially the peristome. The orders and families are likewise based primarily on stable sporophytic details, whereas genera and species are most often differentiated in terms of gametophytic features.
Industry:Science
