- 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.
Disease acquired by drinking water contaminated at its source or in the distribution system, or by direct contact with environmental and recreational waters. Water-borne disease results from infection with pathogenic microorganisms or chemical poisoning.
Industry:Science
Extreme programming (XP) is a new software development method proposed as an alternative to traditional approaches. XP is the best known of the half dozen or so agile methods that stand in deliberate opposition to traditional software development methods.
Industry:Science
Hamilton's principle obtains Lagrange's equations by variations about possible motions of the system between two times (that is, it is an integral principle) rather than changes in the instantaneous state (which characteristic of a differential principle).
Industry:Science
Electric current that reverses direction periodically, usually many times per second. Electrical energy is ordinarily generated by a public or a private utility organization and provided to a customer, whether industrial or domestic, as alternating current.
Industry:Science
Any effect that varies in a back-and-forth or reciprocating manner. Examples of oscillation include the variations of pressure in a sound wave and the fluctuations in a mathematical function whose value repeatedly alternates above and below some mean value.
Industry:Science
Arctic engineering deals with the specialized technical problems of designing structures, facilities, and vehicles to work in the rigors of Arctic conditions. These include low temperatures, snow and ice, floating ice, permafrost, and seasonal frozen ground.
Industry:Science
Fluid motion in which the Mach number <i>M</i>, defined as the speed of the fluid relative to the sonic speed in the same medium, is more than unity. It is, however, common to call the flow transonic when 0.8 <<i>M</i> <1.4, and hypersonic when <i>M</i> > 5.
Industry:Science
Construction materials which, because of their ability to withstand external forces, are considered in the design of a structural framework. Materials used primarily for decoration, insulation, or other than structural purposes are not included in this group.
Industry:Science
Devices for storing digital information that are fabricated by using integrated circuit technology. Semiconductor memories are widely used to store programs and data in almost every digital system, and have replaced core memory as the main active computer memory.
Industry:Science
Electric propulsion systems are widely used to maintain and adjust the orbits of communications satellites. Systems with higher exhaust velocities are being developed for extended missions by space probes, and such a system was used on the <i>Deep Space 1</i> mission.
Industry:Science
