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In this paper the author investigates
A new type of optical element is presented. The presented element substitutes both a thin-film plane polarizer and a narrow-band interference filter for the selected wavelength. A comparative analysis of the basic parameters for the new construction and the classical narrow-band filters is made.
Given multiple R&D programs with different Nike Air Max Thea Print degrees of risk but an identical expected outcome, this paper demonstrates that for risk-neutral firms the lowest-risk R&D program is dominant when the market profit is concave in R&D variable whereas the highest-risk R&D program is dominant Nike Air Max Cheap Online when this profit is convex.
We present a model of preferences on welfare transfers, which incorporates the recipient’s wealth as a signal of needs and deservingness. We show that a paradox may arise: the poorer the recipient is, the less transfer he/she will get. Implications might include the negative impact of targeting assistance to the poorest on public support for welfare.
In this paper, the author investigates two-species nonautonomous delay diffusive preypredator models with Michaelis-Menten functional response. Sufficient conditions are derived for permanence of the species. Further, the author also establishs the sufficient conditions that guarantee the arbitrary positive periodic solution of the systems is global attractive.