- 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.
A series of rolls operating at different speeds. Roll mills are used to grind paint or to mill flour. In paint grinding, a paste is fed between two low-speed rolls running toward each other at different speeds. Because the next roll in the mill is turning faster, it develops shear in the paste and draws the paste through the mill. The film is scraped from the last high-speed roll. For grinding flour, rolls are operated in pairs, rolls in each pair running toward each other at different speeds. Grooved rolls crush the grain; smooth rolls mill the flour to the desired fineness. The term roller mill is applied to a ring-roll mill.
Industry:Science
A series of ternary molybdenum chalcogenide compounds. They were reported by R. Chevrel, M. Sergent, and J. Prigent in 1971. The compounds have the general formula M<sub><i>x</i></sub>Mo<sub>6</sub>X<sub>8</sub>, where M represents any one of a large number (nearly 40) of metallic elements throughout the periodic table; <i>x</i> has values between 1 and 4, depending on the M element; and X is a chalcogen (sulfur, selenium or tellurium). The Chevrel phases are of great interest, largely because of their striking superconducting properties.
Industry:Science
A serious, sometimes life-threatening disease usually caused by a toxin produced by some strains of the bacterium <i>Staphylococcus aureus</i>. The signs and symptoms are fever, abnormally low blood pressure, nausea and vomiting, diarrhea, muscle tenderness, and a reddish rash, followed by peeling of the skin.
Industry:Science
A service to promote the safe, orderly, and expeditious flow of air traffic. Safety is principally a matter of preventing collisions with other aircraft, obstructions, and the ground; assisting aircraft in avoiding hazardous weather; assuring that aircraft do not operate in airspace where operations are prohibited; and assisting aircraft in distress. Orderly and expeditious flow assures the efficiency of aircraft operations along the routes selected by the operator. It is provided through the equitable allocation of system resources to individual flights, generally on a first-come-first-served basis.
Industry:Science
A service, primarily for deaf people, that allows individual viewers to display the dialog of a television program in a readable form on the television screen. In the United Kingdom the service is called subtitling. Closed-caption television was introduced in the United States in 1980.
Industry:Science
A set of audible sounds produced by disturbing the air through the integrated movements of certain groups of anatomical structures. Humans attach symbolic values to these sounds for communication. There are many approaches to the study of speech.
Industry:Science
A set of cellular and epithelial movements that transform the blastula stage of embryonic development into a more complex arrangement of three germ layers. The outer germ layer, which will be exposed to the external environment, is the ectoderm. It gives rise to the epidermis and nervous system of the developing organism. The inner layer of cells, the endoderm, forms the inner lining of the digestive tract and its derivatives. An intermediate layer, the mesoderm, develops into a diverse array of structures, including the skeleton, muscles, kidneys, and circulatory system. The ectoderm and endoderm are usually epithelial, consisting of closely packed sheets of cells connected by tight junctions. The mesoderm is sometimes epithelial, but at other times it is mesenchymal, forming a loose arrangement of cells surrounded by extracellular material. The three germ layers are formed in nearly all animal embryos, while the movements that generate them vary.
Industry:Science
A set of first-order ordinary differential equations that may be used to describe the motion of a mechanical system. Because of their remarkably symmetrical form (which appears in Eqs. (4), below), they are often referred to as the canonical equation of motion (where “canonical” is used in the sense of designating a simple general set of standard equations). The Lagrangian formulation of a system of <i>f</i> degrees of freedom generates <i>f</i> differential equations of second order in the time derivatives of the variables. Hamilton's equations, which are equivalent to Lagrange's equations, consist of 2<i>f</i> first-order and highly symmetrical equations. These properties make Hamilton's equations very useful for general discussions of the motion of systems.
Industry:Science
A set of instructions that cause a computer to perform one or more tasks. The set of instructions is often called a program or, if the set is particularly large and complex, a system. Computers cannot do any useful work without instructions from software; thus a combination of software and hardware (the computer) is necessary to do any computerized work. A program must tell the computer each of a set of minuscule tasks to perform, in a framework of logic, such that the computer knows exactly what to do and when to do it.
Industry:Science
A set of ocean waves caused by any large, abrupt disturbance of the sea surface. If the disturbance is close to the coastline, a local tsunami can demolish coastal communities within minutes. A very large disturbance can cause local devastation and destruction thousands of miles away. Tsunami comes from the Japanese language, meaning harbor wave.
Industry:Science
