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991.
992.
Bednars'ka L. M. Horelenko Yu. K. Kovbuz M. O. Hertsyk O. M. Kotur B. Ya. Nosenko V. K. 《Materials Science》2003,39(2):291-294
Alloying of amorphous Fe-Me-Si-B metallic compositions with nickel and molybdenum results in a decrease in the values of saturation magnetization in fields with a magnetic intensity of 0.72 MA/m. The same alloying additions decrease the temperature of formation of new magnetic Fe3B-type phases, which are stable up to 873 ± 5 K. 相似文献
993.
Ten areas of health knowledge were investigated in 2 studies, 1 of college students (N=169) and 1 of adults from the community (ages 19-70; N=176). Measures assessed knowledge of aging, orthopedic/ dermatological concerns, common illnesses, childhood/early life, serious illnesses, mental health, nutrition, reproduction, safety, and treatment of illness/disease. Significant gender differences favoring women were found for most areas of health knowledge, especially reproduction and early life. Results showed that cognitive ability accounted for the most variance in health knowledge with nonability (personality and interest traits) and demographic variables accounting for smaller but significant amounts of variance across most knowledge domains. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
994.
Higher testosterone levels are related to assertiveness and dominance. Given the relevance of those behavioral correlates to spouses' daily transactions, links between testosterone levels and marital interaction were explored among 92 newlywed couples. Marital problem-solving and social support transactions were assessed, and saliva was collected and assayed for testosterone. Whether marital behavior was related to husbands' and wives' testosterone levels was examined. The link between spouses' testosterone and their behavior was contingent on the partner's testosterone levels. Husbands exhibited more adaptive problem-solving behaviors and social support provision when husbands and wives were concordant for lower testosterone levels. In contrast, wives exhibited more adaptive support provision when spouses had discordant testosterone levels such that wives had higher levels and husbands had lower levels. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
995.
V. N. Gurin M. M. Korsukova S. P. Nikanorov A. P. Nechitailov L. I. Derkachenko Z. I. Uspenskaya I. N. Zimkin 《Technical Physics Letters》2003,29(6):464-466
Ionic substances under normal conditions are stoichiometric compounds with phase diagrams featuring no homogeneity regions.
Crystals grown under nonequilibrium conditions, in particular, under significant centrifugal acceleration, are characterized
by nonstoichiometric compositions (e.g., K2−x
Br1.07). In this way, it is possible to obtain nonequilibrium nonstoichiometric ionic compounds possessing certain homogeneity regions.
Nonstoichiometric crystals of KCl, KBr, and KI grown under various accelerations ranging within (1.3–100.0)×103
g exhibit insignificant variations in the lattice constants and a significant increase in micro-hardness with acceleration. 相似文献
996.
V. B. Kovalevskii V. I. Timoshpol'skii V. T. Svirid 《Journal of Engineering Physics and Thermophysics》2003,76(4):904-908
Consideration is given to the solution of the problem of minimization of fuel consumption in heating a rectangular prism in a continuous furnace. 相似文献
997.
998.
999.
It was shown for the first time that weighable amounts of uranium dioxide and its mixtures with Np, Pu, and Am in the form of solid solutions can be efficiently and quantitatively dissolved in the presence of tributyl phosphate saturated with HNO3. Individual PuO2 and NpO2 are not dissolved under these conditions. In treatment of a mechanical mixture of UO2 with PuO2 or NpO2, uranium is completely dissolved, while plutonium and neptunium remain in the precipitate. 相似文献
1000.
We develop a non-classic algebraic theory for the purpose of investigating the convergence properties of dynamic routing protocols. The algebraic theory can be regarded as a generalization of shortest-path routing, where the new concept of free cycle generalizes that of a positive-length cycle. A primary result then states that routing protocols always converge, though not necessarily onto optimal paths, in networks where all cycles are free. Monotonicity and isotonicity are two algebraic properties that strengthen convergence results. Monotonicity implies protocol convergence in every network, and isotonicity assures convergence onto optimal paths. A great many applications arise as particular instances of the algebraic theory. In intra-domain routing, we show that routing protocols can be made to converge to shortest and widest paths, for example, but that the composite metric of Internet Gateway Routing Protocol (IGRP) does not lead to optimal paths. The more interesting applications, however, relate to inter-domain routing and its Border Gateway Protocol (BGP), where the algebraic framework provides a mathematical template for the specification, design, and verification of routing policies. We formulate existing guidelines for inter-domain routing in algebraic terms, propose new guidelines contemplating backup relationships between domains, and derive a sufficient condition for signaling correctness of internal-BGP. 相似文献