- 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 distribution of plants and animals on islands. Islands harbor the greatest number of endemic species. The relative isolation of many islands has allowed populations to evolve in the absence of competitors and predators, leading to the evolution of unique species that can differ dramatically from their mainland ancestors.
Industry:Science
The increased use of Web resources has created a need for more efficient and useful search methods. The current mechanisms for assisting the search and retrieval process are quite limited, mainly because they lack access to documents' semantics and because of the underlying difficulties in providing suitable search patterns.
Industry:Science
That part of a dc motor or generator which serves the dual function, in combination with brushes, of providing an electrical connection between the rotating armature winding and the stationary terminals, and of permitting the reversal of the current in the armature windings. For explanation of the necessity of this function .
Industry:Science
Techniques for supplying nutrients and water directly to the roots of plants, without soil or other media. Methods that utilize an inert medium such as sand, gravel, peat, or vermiculite to provide the root environment, with water and nutrients added in solution, are soilless culture but are not hydroponic in the strict sense.
Industry:Science
The branch of process metallurgy dealing with the use of electricity for smelting or refining of metals. The electrochemical effect of an electric current brings about the reduction of metallic compounds, and thereby the extraction of metals from their ores (electrowinning) or the purification of the metals (electrorefining).
Industry:Science
Systems that act to control the movement of people, goods, and vehicles in order to ensure their safe, orderly, and expeditious flow throughout the transportation system. Each of the five areas of transportation—roadways, airports and airways, railways, coastal and inland waterways, and pipelines—have unique systems of control.
Industry:Science
That property of matter which manifests itself as a resistance to any change in the motion of a body. Thus when no external force is acting, a body at rest remains at rest and a body in motion continues moving in a straight line with a uniform speed (Newton's first law of motion). The mass of a body is a measure of its inertia.
Industry:Science
The comparative analysis of living and fossil species, including their discovery, description, evolutionary relationships to other species, and patterns of geographic distribution. Because systematics involves crucial activities of describing and understanding the history of life, it is the primary science of biological diversity.
Industry:Science
That branch of science which deals with measurements of light (visible electromagnetic radiation) according to its ability to produce visual sensation. Specifically, photometry deals with the attribute of light that is perceived as intensity, while the related attribute of light that is perceived as color is treated in colorimetry.
Industry:Science
The evaluation of a physical system (engineering product) in conditions which simulate one or more of the environments that may harm the system or adversely affect its performance. Such testing is typically undertaken during the development of new products, with the aim of establishing or improving their reliability and durability.
Industry:Science
