Search results
Results From The WOW.Com Content Network
With the appropriate choice of the imaginary current densities, the fields inside the surface or outside the surface can be deduced from the imaginary currents. [4] In a radiation problem with given current density sources, electric current density J 1 {\displaystyle J_{1}} and magnetic current density M 1 {\displaystyle M_{1}} , the tangential ...
The authority under FAR Part 12, Commercial Items (and services), must be used thoughtfully and carefully. It is very tempting for a contracting officer to use FAR Part 12 and hence FAR Part 13 in situations where such use is clearly not appropriate in view of the basic reasons commercial item acquisition authority was created by Congress.
Title 14 CFR – Aeronautics and Space is one of the fifty titles that make up the United States Code of Federal Regulations (CFR). Title 14 is the principal set of rules and regulations (sometimes called administrative law) issued by the Department of Transportation and Federal Aviation Administration, federal agencies of the United States which oversee Aeronautics and Space.
There are several equivalent definitions of a Riemann surface. A Riemann surface X is a connected complex manifold of complex dimension one. This means that X is a connected Hausdorff space that is endowed with an atlas of charts to the open unit disk of the complex plane: for every point x ∈ X there is a neighbourhood of x that is homeomorphic to the open unit disk of the complex plane, and ...
Since the power of a wave in a particular medium is proportional to the square of a field quantity, one may speak of a penetration depth at which the magnitude of the electric (or magnetic) field has decayed to 1/e of its surface value, and at which point the power of the wave has thereby decreased to / or about 13% of its surface value:
The Extra-Terrestrial Exposure Law (14 CFR 1211 of the Code of Federal Regulations) — in force from 1969 to 1977 — was the popular name for regulations adopted by the National Aeronautics and Space Administration (NASA) in 1969 to formalize its "policy, responsibility and authority to guard the Earth against any harmful contamination … resulting from personnel, spacecraft and other ...
Washington metropolitan area airports with the Washington-Virginia Airport (on left) and showing the one-mile lateral area around the airport. Crowded airspace in the Washington DC area resulted in the Federal Aviation Agency establishing special flight restrictions which were published in the 1961 Code of Federal Regulations as part of Title 14 – Aeronautics and Space. [13]
The front cone of a hypoid or bevel gear is an imaginary cone tangent to the inner ends of the teeth, with its elements perpendicular to those of the pitch cone. The surface of the gear blank at the inner ends of the teeth is customarily formed to such a front cone, but sometimes may be a plane on a pinion or a cylinder in a nearly flat gear. [1]