- 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.
Carnivorous mammals of the suborder Pinnipedia, which includes 32 species of seals, sea lions, and walrus in 3 families. All species of the order are found along coastal areas, from the Antarctic to the Arctic regions. Although many species have restricted distribution, such as the Baikal seal (<i>Pusa sibirica</i>) of Lake Baikal in Russia, the group as a whole has worldwide distribution.
Industry:Science
For a system executing simple harmonic motion, the mechanical impedance is the ratio of force to particle velocity. If the force is that which drives the system and the velocity is that of the point of application of the force, the ratio is the input or driving-point impedance. If the velocity is that at some other point, the ratio is the transfer impedance corresponding to the two points.
Industry:Science
Electric power systems involve the generation, transmission, and distribution of electric energy. The transmission of generated electric energy is performed at higher voltages to minimize losses on transmission lines. Closer to load centers, energy needs to be transformed to a voltage level suitable for end users. Substations are nodes in the power system where this transformation takes place.
Industry:Science
Endocrine disruptors are chemical compounds that interfere with the proper function of endocrine systems in humans and other organisms. There has been much scientific and medical research on pharmaceuticals as endocrine disruptors. However, endocrine disruptors are increasingly being discovered in the environment, and scientists and engineers are taking steps to reduce the risks posed by them.
Industry:Science
Hormones, neurotransmitters, and growth factors stimulate the production of intracellular messengers, including the lipid-derived diacylglycerol (DAG), in their target cells to modify their behavior. One of the prominent intracellular targets of DAG is the protein kinase C (PKC) family. However, the mechanisms by which PKC-mediated signals are decoded by the cell remain incompletely understood.
Industry:Science
Anthrax, a disease of antiquity, infects domestic and wild herbivorous animals, including sheep, goats, cattle, and swine. Humans become infected under natural conditions by contact with infected animals or contaminated animal products, such as wool, hair, hides, and bone meal. <i>Bacillus anthracis</i>, the causative agent of anthrax, has recently become of great concern as a biological weapon.
Industry:Science
Commonly measured properties of metals (such as tensile strength, hardness, fracture toughness, creep, and fatigue strength) associated with the way that metals behave when subjected to various states of stress. The properties are discussed independently of theories of elasticity and plasticity, which refer to the distribution of stress and strain throughout a body subjected to external forces.
Industry:Science
Green engineering is a much-needed approach to transform existing engineering disciplines and practices to those that promote sustainability. The concept of sustainability is to develop and implement technologically and economically viable products, processes, and systems that meet the needs of humanity, while protecting the environment. Green engineering is governed by the following principles:
Industry:Science
Coalbed methane production, sometimes referred to as coal degasification, is the process of extracting natural gas from underground coal formations (seams). This extraction is accomplished with production technology similar to that used in the conventional natural gas industry. The objectives of producing the natural gas from a coal seam are to improve mine safety, to sell the natural gas, or both.
Industry:Science
Exploration for mineral deposits; also referred to as ore search. The result of prospecting is the discovery of potentially economic mineralization, that is, the prospect. Mineral exploration also continues beyond prospecting to include the delineation and evaluation of the prospect to determine its minability as an orebody or economic mineral deposit. A successful prospect is developed into a mine.
Industry:Science
