On the role of atomic ordering in the formation of a high-coercivity state in iron-cobalt-vanadium alloys

Processes that occur in the iron-cobalt-vanadium alloy with 52% Co and 7% V (vicalloy) upon heating to 1000°C and cooling have been studied by the dilatometric and magnetometric methods. It has been found that upon heating two phase transitions occur in the alloy, namely, B2-type atomic ordering in the α phase and a polymorphic α → γ transformation, whose temperature intervals differ considerably. An analysis of the dependences of the coercive force and the hardness of the alloy on the annealing temperature has shown that the maximum magnitudes of these parameters correspond to the ordering temperatures in the α phase. There was made an assumption that the magnetization reversal process in the alloy tested is related to the displacement of ferromagnetic domain walls and their pinning at the boundaries of antiphase domains ordered by the B2 type.     

The designer's perspective to atomic noncooperative networks

In noncooperative networks, resources are shared among selfish users, which optimize their individual performance measure. Traditional design methods tend to perform poorly in such networks, as they do not take into account the inherent noncooperative nature of the network users. Such networks require specialized design techniques in order to achieve efficient utilization of resources. We consider the generic and practically important class of atomic resource sharing networks, in which traffic bifurcation is not implemented, hence each user allocates its whole traffic to one of the network resources. We investigate topologies of parallel resources within a game-theoretic framework and establish the foundations of a design and management methodology that enables operation of such networks efficiently, despite both the lack of cooperation among users and the restrictions imposed by atomic resource sharing. We study various problems pertaining to capacity allocation, pricing, and admission control, and show that their solutions are substantially different from those corresponding to traditional networks     

The real costs of plagiarism: Russian governors,plagiarized PhD theses,and infrastructure in Russian regions

This paper investigates whether politicians who have plagiarized their PhD dissertations perform worse in running their polities than those who have not committed plagiarism. We look at the Russian regional governors and document that a substantial portion of them have plagiarized PhD theses. We find a negative association between plagiarized PhD of a governor and development of infrastructure (specifically, housing construction and spread of broadband Internet) in a region, controlling for other region-level characteristics potentially affecting infrastructural development. We argue that in the Russian context, a plagiarized PhD thesis is likely to indicate that a governor both is inclined to dishonest behavior and possesses poor managerial capabilities, which should have a particularly negative effect on the performance of their regions in terms of the development of infrastructure.

     

Sociocultural and cognitive factors in aging and sexual expression: Conceptual and research issues.

Delineates the importance of investigating sexuality in aging, summarizes aspects of current knowledge about sociocultural and cognitive factors influencing problems with existing sex research, and offers recommendations for future research on sexuality in aging people. A study describing the behavioral, cognitive, and affective aspects of sexual expression in a sample of aging married couples (50–80 yrs) is presented to illustrate how some previous methodological difficulties might be addressed. Findings identify some of the realities of sexuality in aging individuals and illustrate the complexities in the definition and evaluation of sexual expression and experience. (French abstract) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

SOME PROPERTIES OF ZINC OXIDE BODIES1

Melting Point of ZnO .—The melting point of ZnO is above 1800° C and may be above its normal sublimation point. Volume Shrinkage and Porosity of ZnO Bodies .—A very hard and dense body composed of pure ZnO can be prepared. At high temperatures it exhibits the unusual phenomenon of volume shrinkage accompanied by an increasing porosity. Zinc Retort Bodies .—In the discussion the possible advantages of incorporating zinc oxide in a zinc retort body are mentioned.     

Controlling surfaces and interfaces of semiconductors using organic molecules

Control over semiconductor surface energetics can be achieved using different chemisorbed organic molecules with diverse electronic properties. We find evidence of such control over CdTe upon adsorption of dicarboxylic acid derivatives with different substituted phenyl rings. FT-IR measurements show that the dicarboxylic acid derivatives bind as carboxylates to form approximately one monolayer. Such chemisorption modifies both the band bending and the electron affinity (up to 500 and 700 mV, respectively), as measured by contact potential difference WPM Changes in band bending result from a coupling between molecular orbitals and surface states close to the valence band and depend on the withdrawing character of the phenyl substituent. A model is presented to interpret and explain the data.