Housing Construction on Territory of Baikal-Amur Mainline Building-up in 1970s—1980s (Khabarovsk Region)

The history of the construction of BAM settlements on the territory of the Khabarovsk region in 1974—1984 is considered. The relevance of the study is due to the need to study the experience of housing construction of the Soviet era in areas of new development, the use of which is possible for the development of modern programs of the Far East. Using materials from the funds of the State Archives of the Khabarovsk region, the authors analyzed the volumes of construction of housing and social infrastructure facilities, identified the main shortcomings and difficulties associated with this process, such as lagging behind the construction of housing, adjusting master plans. An attempt has been made to classify the BAM settlements of the Khabarovsk region, to determine the set of social infrastructure facilities in them. The novelty of the research is determined by the poor study of the history of BAM construction settlements on the territory of the Khabarovsk region and the introduction of new sources into scientific circulation. The authors come to the conclusion that the lack of housing and the poor development of social infrastructure in the BAM villages of the Khabarovsk region became one of the reasons for the outflow of BAM builders, which negatively affected the implementation of the government’s plans to settle the Far East and ensure the effective use of the Baikal-Amur Mainline

Why hyperbolic theories of dissipation cannot be ignored: Comments on a paper by Kostadt and Liu

Contrary to what is asserted in a recent paper by Kostadt and Liu ("Causality and stability of the relativistic diffusion equation"), experiments can tell apart (and in fact do) hyperbolic theories from parabolic theories of dissipation. It is stressed that the existence of a non--negligible relaxation time does not imply for the system to be out of the hydrodynamic regime.Comment: 8 pages Latex, to appear in Phys.Rev.

Quantum fluids of light

This article reviews recent theoretical and experimental advances in the fundamental understanding and active control of quantum fluids of light in nonlinear optical systems. In presence of effective photon-photon interactions induced by the optical nonlinearity of the medium, a many-photon system can behave collectively as a quantum fluid with a number of novel features stemming from its intrinsically non-equilibrium nature. We present a rich variety of photon hydrodynamical effects that have been recently observed, from the superfluid flow around a defect at low speeds, to the appearance of a Mach-Cherenkov cone in a supersonic flow, to the hydrodynamic formation of topological excitations such as quantized vortices and dark solitons at the surface of large impenetrable obstacles. While our review is mostly focused on a class of semiconductor systems that have been extensively studied in recent years (namely planar semiconductor microcavities in the strong light-matter coupling regime having cavity polaritons as elementary excitations), the very concept of quantum fluids of light applies to a broad spectrum of systems, ranging from bulk nonlinear crystals, to atomic clouds embedded in optical fibers and cavities, to photonic crystal cavities, to superconducting quantum circuits based on Josephson junctions. The conclusive part of our article is devoted to a review of the exciting perspectives to achieve strongly correlated photon gases. In particular, we present different mechanisms to obtain efficient photon blockade, we discuss the novel quantum phases that are expected to appear in arrays of strongly nonlinear cavities, and we point out the rich phenomenology offered by the implementation of artificial gauge fields for photons.Comment: Accepted for publication on Rev. Mod. Phys. (in press, 2012

Social status and satisfaction of the phlebosurgical patient

The purpose of the study is to give a medical and social characteristic of patients treated for chronic diseases of the veins of the lower extremities in an outpatient phlebological center.Цель исследования – дать медико-социальную характеристику пациентов, лечившихся по поводу хронических заболеваний вен нижних конечностей в амбулаторном флебологическом центре

Vygotsky in English: What Still Needs to Be Done

At present readers of English have still limited access to Vygotsky’s writings. Existing translations are marred by mistakes and outright falsifications. Analyses of Vygotsky’s work tend to downplay the collaborative and experimental nature of his research. Several suggestions are made to improve this situation. New translations are certainly needed and new analyses should pay attention to the contextual nature of Vygotsky’s thinking and research practice

Photoexcitation of atoms by Laguerre-Gaussian beams

In a recent experiment, Schmiegelow et al. [Nat. Commun. 7, 12998 (2016)] investigated the magnetic sublevel population of Ca + ions in a Laguerre-Gaussian light beam if the target atoms were just centered along the beam axis. They demonstrated in this experiment that the sublevel population of the excited atoms is uniquely defined by the projection of the orbital angular momentum of the incident light. However, little attention has been paid so far to the question of how the magnetic sublevels are populated when atoms are displaced from the beam axis by some impact parameter b. Here, we analyze this sublevel population for different atomic impact parameters in first-order perturbation theory and by making use of the density-matrix formalism. Detailed calculations are performed especially for the 4s 2 S 1/2 → 3d 2 D 5/2 transition in Ca + ions and for the vector potential of a Laguerre-Gaussian beam in Coulomb gauge. It is shown that the magnetic sublevel population of the excited 2 D 5/2 level varies significantly with the impact parameter and is sensitive to the polarization, the radial index, as well as the orbital angular momentum of the incident light beam