- 行业: Printing & publishing
- Number of terms: 178089
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- 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.
Intensively managed plants cultivated for food or for esthetic purposes. Plant agriculture is divided traditionally into the fields of agronomy (herbaceous field crops, mainly grains, forages, oilseeds, and fiber crops), forestry (forest trees and products), and horticulture (garden crops, particularly fruits, vegetables, spices and herbs, and all plants grown for ornamental use). Most horticultural plants are utilized in the living state, with water essential to quality; thus most horticultural plants and products are highly perishable.
Industry:Science
In the past few decades, society has moved from information poverty to information abundance. Increasingly, documents become available on-line through the World Wide Web, Internet document repositories, digital libraries, and multimedia servers. A user with a Web browser and an Internet connection can now browse newspapers from around the world, collections of museums and art galleries, libraries of research articles, commercial content from companies in all industries, and countless pages of content self-published by authors of every type.
Industry:Science
One of the most sought objectives in understanding the evolution of the human brain is to pinpoint the nature of the changes that provided humans with language abilities. Language is widely considered to be the most unique of all human attributes. A powerful evolutionary indicator is that the modality by which the brain receives “language” (such as spoken, written, signed, or gestured symbols) does not seem to matter for effective communication, as long as the communication system or modality is operating at the appropriate cognitive level.
Industry:Science
Quantum mechanics divides particles or atoms into two classes: bosons and fermions. One of the most important characteristics of fermions is that no two fermions can be in the same quantum state; this is known as Pauli's exclusion principle. For bosons this restriction is not present, and in principle there is no limit to the number of bosonic particles that can be in the same quantum state. Electrons and protons are examples of fermionic particles. Light quanta (photons) and neutral atoms that contain an even number of neutrons are bosons.
Industry:Science
Osteoprotegerin is a protein that plays a central role in regulating bone mass. Throughout life, bone is constantly being broken down and rebuilt in a process that replaces old bone with new bone. These events are mediated by osteoclasts, the cells that resorb bone, and osteoblasts, the cells that form bone. Maintaining bone mass is critical for the integrity of the skeleton, which provides protection for soft tissues, support for locomotion, a scaffold for muscle attachment, and a reservoir for mineral ions (calcium, phosphorus, magnesium).
Industry:Science
Particle tracking velocimetry (PTV) is a well-known technique for the determination of velocity vectors of flow within an observation volume. However, for a long time it was rarely applied because of the intensive effort necessary to measure coordinates of a large number of flow marker particles in many images. With today's imaging hardware in combination with the methods of digital image processing and digital photogrammetry, however, new possibilities have arisen for the design of completely automatic particle tracking velocimetry systems.
Industry:Science
Landforms that result from erosion by water flowing on land surfaces. This water may concentrate in channels as streams and rivers or flow in thin sheets and rills down slopes. Essentially all land surfaces are subjected to modification by running water, and it is among the most important surface processes. Valleys are cut, areas become dissected, and sediment is moved from land areas to ocean basins. With increasing dissection and lowering of the landscape, the land area may pass through a series of stages known as the fluvial erosion cycle.
Industry:Science
Relations between the real and imaginary parts of a response function. The term dispersion refers to the fact that the index of refraction of a medium is a function of frequency. In 1926 H. A. Kramers and R. Kronig showed that the imaginary part of an index of refraction (that is, the absorptivity) determines the real part (that is, the refractivity); this is called the Kramers-Kronig relation. The term dispersion relation is now used for the analogous relation between the real and imaginary parts of any response function, such as Eq. (14) below.
Industry:Science
Several species of the genus <i>Vaccinium</i>, plant order Ericales, ranging from low-growing, almost prostrate plants to vigorous shrubs reaching a height of 12–15 ft (3.5–4.5 m). The fruit, a berry, is usually black and covered with bluish bloom, generally occurring in clusters and has numerous small seeds, a characteristic that distinguishes the blueberry from the huckleberry, which has 10 rather large, gritty seeds. Although there are blueberry species on other continents, all cultivated varieties in the United States are American in origin.
Industry:Science
Since the beginning of the twentieth century, alternating current (ac) of frequency 50 or 60 Hz has been the dominant method for transmission and distribution of electric power. However, high-voltage direct-current (HVDC) transmission can provide economic solutions for very long distances and enables interconnections between unsynchronized ac networks to be realized. Worldwide, HVDC schemes totaling 59 GW with individual scheme ratings between 50 and 6300 MW have been installed, and many more applications for this technology are being considered.
Industry:Science
