A high-strength material has been produced by consolidating rapidly solidified particles of an Al alloy. The claimed Al alloy consists essentially of, in weight percentages: Fe: 4-15%, vanadium: ...0.5-8%, Mo: 0.5-8%, Zr: 0.3-8%, at least one member of the group consisting of: Ni: 0.5-8% and Ti: 0.5-8%, and the balance being essentially Al, the Al alloy being strengthened by a fine dispersion of Fe-containing intermetallic compounds having a size of 5 mu m and less.
An efficient estimation method digital transmission error performance using in-service monitoring (ISM) is described. The method estimates the number of errored bits during in-frame and out-frame ...conditions assuming random error occurrence; calculates second-by-second the occurrence probabilities for CCITT G.821 parameters errored seconds (ES), severely errored seconds (SES), degraded minutes (DM), and unavailable time (UT) and is applicable at any digital hierarchy stage. This method is shown to be effective in the estimation of the G.821 parameters at DS1 using DS2 ISM information with the application of the field data. Stochastic analyses show that the estimated data correlate well with actual measurements. In addition, conservative estimation is discussed from the viewpoint of maintenance.< >
A highly abrasion resistant and practical Al material has been developed with which only Si particles grow during the solidification process of powder. When the diameter of Si particles is over a ...critical value after distributing, compounds of Fe, Ni and Mn with high abrasion resistivity can be obtained. This material has a high tensile strength, good forging capacity, machinability, a small linear expansion coefficient and a high modulus of elasticity. Application of this material is spreading as VTR cylinder, vane of rotary compressor, piston, connecting rod and cylinder sleeve. 2 ref.--JLMA(UK/US).
Cloning of pig mitochondrial DNA and its efficiency as a probe Ishida, N. (National Inst. of Animal Industry, Kukizaki, Ibaraki (Japan)); Inumaru, S; Takeda, K ...
Animal Science and Technology (Japan),
(Oct 1992), Letnik:
63, Številka:
10
Journal Article
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