We consider the motion of uncharged dust grains of arbitrary shape including the effects of electromagnetic radiation and thermal emission. The resulting relativistically covariant equation of motion is expressed in terms of standard optical parameters. Explicit expressions for secular changes of osculating orbital elements are derived in detail for the special case of the Poynting-Robertson ef...

We study the Schrödinger equation of a class of two-level systems under the action of a periodic time-dependent external field in the situation where the energy difference 2ǫ between the free energy levels is sufficiently small with respect to the strength of the external interaction. Under suitable conditions we show that this equation has a solution in terms of converging power series expansi...

We investigate the back reaction of cosmological perturbations on an inflationary universe using the renormalization-group method. The second-order zero mode solution which appears by the nonlinearity of the Einstein equation is regarded as secular terms of a perturbative expansion, we redefine constants of integration contained in the background solution and absorbed the secular terms to these...

In this paper, the equation of motion for an incompressible transversely isotropic fibre-reinforced elastic solid is derived in terms of a scalar function.   The general solution of the equation of motion is obtained, which satisfies the required radiation condition.  The appropriate traction free boundary conditions are also satisfied by the solution to obtain the required secular equation for...

A proper formulation in the perturbative renormalization group method is presented to deduce amplitude equations. The formulation makes it possible not only avoiding a serious diiculty in the previous reduction to amplitude equations by eliminating all of the secular terms but also consistent derivation of higher-order correction to amplitude equations. Recently a novel method based on the pert...

french revolution was a starting point for the emergence of concepts such as secular and laic. although most of the people in iran and arab countries consider them equivalent, purpose and lexical roots of these two should make a distinction between them. abuse or overuse of these terms by marxist, socialist, liberal, ond other movements has resulted in a misunderstanding of them and consequentl...

* Ph.D., M.D., Department of Philosophy, Rice University, Professor Emeritus, Baylor College of Medicine. Houston, Texas ABSTRACT: Christian bioethics conflicts with secular morality and its bioethics. From artificial insemination from donors, embryonic stem-cell research, and abortion to passive euthanasia, the commitments of traditional Christian bioethics collide with those of the dominant s...

As Turkey is officially a secular state and it adopts Swiss Civil Code, thestate implements secular legal system. However, as people in Turkey are predominantlyMuslim and theyare born and raised in a traditionally Muslim environment,people generally and especially women live under the influence of these two sometimescontradictory and inconsistent legal systems and customs. As a result, thereare...

background: iran, a low- to middle-income country, has experienced considerable socioeconomic changes in 20 th century, which their impacts on the adult heights has not been assessed deeply by now. this article aims to quantify the temporal varia­tions of height (with respect to shrinkage of height due to aging) and its deterministic factors in iranian population born be­tween 1940 and 1984. me...

Due to its artificial and unnatural structure, Israeli society has since the beginning of its establishment, been a context for the emergence of different kinds of cleavages and tensions. This state of affairs has endangered the political stability of the Israeli regime. The present research is trying to answer this question: what is the effect of religious-secular cleavages in Israel on the fu...