- 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 notion of complexity has been of interest for a very long time. However, there has been a relatively recent resurgence of interest in this topic. One reason is people's sense that the world has become more complex, perhaps due to globalization of the economy, increased high-profile terrorism, and even global warming. Everything seems more interconnected, just as we are all becoming more connected via information and communications technologies.
Industry:Science
The movement of cargo on inland and intracoastal waterways by barge. Barges move over 800 million tons of raw materials and finished goods each year just in the network of inland and coastal waterways of the United States. This waterways network is a “super water highway” that is an important part of the intermodal transportation system. Barges directly serve 87% of all major United States cities, accounting for 78% of all domestic waterborne traffic.
Industry:Science
The process of protecting against threats to computing systems. A threat is an event that can cause harm to computers, data or programs, or computations. A failure of computer security occurs because of a vulnerability or weakness in a computing system. A threat agent—person, event, or circumstance—exploits a vulnerability. Computer security involves protecting against failures of availability, integrity or correctness, and confidentiality or privacy.
Industry:Science
The surface in the electronic wavenumber space of a metal that separates occupied from empty states. Every possible state of an electron in a metal can be specified by the three components of its momentum, or wavenumber. The name derives from the fact that half-integral spin particles, such as electrons, obey Fermi-Dirac statistics and at zero temperature fill all levels up to a maximum energy called the Fermi energy, with the remaining states empty.
Industry:Science
The study of the Earth and its relations to the rest of the solar system using the principles and practices of physics. Geophysics is considered by some to be a branch of geology, by others a branch of physics. It is distinguished from geology by its use of instruments to make direct and indirect measurements of the phenomena being studied in contrast to the more direct observations of geology, and by its concern with other members of the solar system.
Industry:Science
The study of the interactions among soil organisms, and between biotic and abiotic aspects of the soil environment. Soil is made up of a multitude of physical, chemical, and biological entities, with many interactions occurring among them. Soil is a variable mixture of broken and weathered minerals and decaying organic matter. Together with the proper amounts of air and water, it supplies, in part, sustenance for plants as well as mechanical support.
Industry:Science
The study of the universe and the objects in it through scientific investigation. Since much of contemporary astronomy uses the laws and methods of physics, the terms “astronomy” and “astrophysics” are usually used interchangeably. However, modern astronomy also uses techniques from many other scientific disciplines, including chemistry, geology, and biology, for which the terms astrochemistry, planetary science, and astrobiology are increasingly used.
Industry:Science
The theory that the universe began in a state of extremely high density and has been expanding since some particular instant that marked the origin of the universe. The big bang is the generally accepted cosmological theory; the incorporation of developments in elementary particle theory has led to the inflationary universe version. The predictions of the inflationary universe and older big bang theories are the same after the first 10<sup>−35</sup> s.
Industry:Science
The removal of water from the surface of the land and the control of the shallow ground water table improves the soil as a medium for plant growth. The sources of excess water may be precipitation, snowmelt, irrigation water, overland flow or underground seepage from adjacent areas, artesian flow from deep aquifers, floodwater from channels, or water applied for such special purposes as leaching salts from the soil or for achieving temperature control.
Industry:Science
The third oldest period of the Paleozoic Era, spanning an interval from about 412 to 438 million years before the present. The Silurian system includes all sedimentary rocks deposited and all igneous and metamorphic rocks formed in the Silurian Period. Both the base and top of the Silurian have been designated by international agreement at the first appearances of certain graptolite species in rock sequences at easily examined and well-studied outcrops.
Industry:Science
