- 行业: Printing & publishing
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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.
Processes for separation of gases based on the adsorption effect. When a pure gas or a gas mixture is contacted with a solid surface, some of the gas molecules are concentrated at the surface due to gas-solid attractive forces, in a phenomenon known as adsorption. The gas is called the adsorbate and the solid is called the adsorbent.
Industry:Science
Neuromorphic engineering is a new field that uses the functional principles of biological nervous systems to inspire the design and fabrication of artificial neural systems, such as vision chips and roving robots. In turn, these artificial neural systems are used to test biological principles, such as learning and sensorimotor control.
Industry:Science
Inborn or acquired abnormalities in the structure or function of the human pituitary gland. Pituitary disorders can stem from any of five disease processes: tumors and other growths, intrinsic lesions of the anterior lobe, diseases affecting gland function, hypothalamic malfunction, and systemic disease that affects the adenohypophysis.
Industry:Science
Recoil-free gamma-ray resonance absorption. The Mössbauer effect, also called nuclear gamma resonance fluorescence, has become the basis for a type of spectroscopy which has found wide application in nuclear physics, structural and inorganic chemistry, biological sciences, the study of the solid state, and many related areas of science.
Industry:Science
Sheets of magnetic material with thicknesses of a few micrometers or less, used in the electronics industry. Magnetic films can be single-crystal, polycrystalline, amorphous, or multilayered in the arrangement of their atoms. Applications include magnetooptic storage, inductive recording media, magnetoresist sensors, and thin-film heads.
Industry:Science
Isaac Newton's “quantity of motion,” defined as the product of a particle's mass and velocity, whose time rate of change equals the applied force; in modern physics, the rate of change of energy with respect to velocity. The law of conservation of linear momentum states that the total linear momentum of an isolated system remains constant.
Industry:Science
In its original sense, mechanics refers to the study of the behavior of systems under the action of forces. Statics deals with cases where the forces either produce no motion or the motion is not of interest. Dynamics deals properly with motions under forces. Mechanics is subdivided according to the types of systems and phenomena involved.
Industry:Science
One of the three major groups of rocks that make up the crust of the Earth. The other two groups are igneous rocks and sedimentary rocks. Metamorphic rocks are preexisting rock masses in which new minerals, or textures, or structures are formed at higher temperatures and greater pressures than those normally present at the Earth's surface.
Industry:Science
Propulsion of a vehicle by means of a gas turbine. While gas turbines have found significant applications in stationary and mobile power plants, their light weight, compact volume, low frontal area, and long life (in comparison to reciprocating diesel or Otto-cycle internal combustion engines) make them ideal for primary propulsion of vehicles.
Industry:Science
Paleosols, or ancient soils, are now widely recognized in ancient sedimentary and volcanic rocks, and along major geological unconformities as old as 3500 million years. They provide information, independent from the fossil record of organisms, for terrestrial environments, plant evolution, atmospheric composition, and global change in the past.
Industry:Science
