The present work is motivated by recent experiments aimed to measure the propagation velocity of bound electromagnetic field that reveal no retardation in the absence of EM radiation. We show how these findings can be incorporated into the mathematical structure of special relativity theory that allows us to reconsider some selected problems of classical and quantum electrodynamics. In particular, we come to the conclusion that the total four-momentum for a classical system “particles plus fields” ought to be a present state (...) function of moving charges if EM radiation is negligible. In quantum domain, we analyze novel definition of the momentum operator recently suggested in the study of quantum phase effects. It implies that bound EM field energy and momentum are to be present state functions, too. Being in agreement with reported experiments, these conclusions suggest the necessity to carry out more precise experimental verifications for additional and independent determination of propagation properties of bound EM fields. A scheme of a possible experiment on this subject is also proposed. (shrink)

In this paper we pay attention to the inconsistency in the derivation of the symmetric electromagnetic energy–momentum tensor for a system of charged particles from its canonical form, when the homogeneous Maxwell’s equations are applied to the symmetrizing gauge transformation, while the non-homogeneous Maxwell’s equations are used to obtain the motional equation. Applying the appropriate non-homogeneous Maxwell’s equations to both operations, we obtained an additional symmetric term in the tensor, named as “compensating term”. Analyzing the structure of this “compensating term”, (...) we suggested a method of “gauge renormalization”, which allows transforming the divergent terms of classical electrodynamics (infinite self-force, self-energy and self-momentum) to converging integrals. The motional equation obtained for a non-radiating charged particle does not contain its self-force, and the mass parameter includes the sum of mechanical and electromagnetic masses. The motional equation for a radiating particle also contains the sum of mechanical and electromagnetic masses, and does not yield any “runaway solutions”. It has been shown that the energy flux in a free electromagnetic field is guided by the Poynting vector, whereas the energy flux in a bound EM field is described by the generalized Umov’s vector, defined in the paper. The problem of electromagnetic momentum is also examined. (shrink)

jild-i 1. Āzādī va marzʹhāyash -- jild-i 2. Istiqlāl (farhangī).

This paper explores the use of an ethics framework based on the Public Health Code of Ethics to guide rationing decisions during a pandemic flu crisis involving a shortage of ventilators. While the law provides public health officials with authority to act, public health officials, as community leaders and health department managers, must address complex questions about how they should use their legal authority, how they can ethically justify a particular action, how they should engage community stakeholders in decision making, (...) and how the process of public justification should take place. Recognising the need for a tool that could help public health officials manage ethical tensions in practice, such as allocation of scarce resources, the Public Health Leadership Society led efforts to develop a Public Health Code of Ethics. The 12 Principles in the Code were written to express the general norms implicit in the practice of public health professionals. The Code offers no hierarchical weighting of the different principles and anticipates that weights and specification of the principles would take place in the context of each community through a process of engagement between public health officials and community stakeholders about specific cases. We describe how public health officials can use the Code to guide deliberation in helping communities prepare to address the tragic choices when allocating scarce ventilators in an influenza pandemic. (shrink)

Recent preclinical studies have shown the feasibility of specific variants of nuclear transfer to prevent mitochondrial DNA disorders. Nuclear transfer could be a valuable reproductive option for carriers of mitochondrial mutations. A clinical application of nuclear transfer, however, would entail germ-line modification, more specifically a germ-line modification of the mitochondrial genome. One of the most prominent objections against germ-line modification is the fear that it would become possible to alter ‘essential characteristics’ of a future person, thereby possibly violating the child's (...) right to an open future. As only the nuclear DNA would contain the ingredients for individual characteristics, modification of the mtDNA is often considered less controversial than modification of the nuclear DNA. This paper discusses the tenability of this dichotomy. After having clarified the concept of germ-line modification, it argues that modification of the mtDNA is not substantively different from modification of the nuclear DNA in terms of its effects on the identity of the future person. Subsequently the paper assesses how this conclusion affects the moral evaluation of nuclear transfer to prevent mtDNA disorders. It concludes that the moral acceptability of germ-line modification does not depend on whether it alters the identity of the future child—all germ-line modifications do—but on whether it safeguards the child's right to an open future. If nuclear transfer to prevent mtDNA disorders becomes safe and effective, then dismissing it because it involves germ-line modification is unjustified. (shrink)

Although various aesthetic themes have preoccupied many major philosophers, from Plato to Goodman, the central questions of the philosophy of art have remained ill-defined. This book gives a concise and systematic account of the leading philosophical ideas about art and aesthetics from ancient times to the present day, and goes on to propose a new theory of aesthetic satisfaction and artistic abilities.

В книге продолжается обсуждение тем, представленных в труде "Психология нравственности", изданном в 2010 году. Авторы обсуждают пути решения проблем и преодоления переживаемого нашим обществом глубокого нравственного кризиса.

Издание содержит: теоретические основания субъектного подхода в психологии; основные направления психологического анализа; экспериментальные исследования психологии субъекта и др.

Discussion of the concept of evil in Indian philosophy.