A study of phase separation processes in presence of dislocations in binary systems subjected to irradiation

Dislocation-assisted phase separation processes in binary systems subjected to irradiation effect are studied analytically and numerically. Irradiation is described by athermal atomic mixing in the form of ballistic flux with spatially correlated stochastic contribution. While studying the dynamics of domain size growth we have shown that the dislocation mechanism of phase decomposition delays the ordering processes. It is found that spatial correlations of the ballistic flux noise cause segregation of dislocation cores in the vicinity of interfaces effectively decreasing the interface width. A competition between regular and stochastic components of the ballistic flux is discussed.Comment: 22 pages, 11 figure

Information Management in the Application of BIM in Construction. The Roles and Functions of the Participants of the Construction Process

AbstractOne of the effective tools to improve the quality of construction, expenditure control and logistics management is the use of BIM-technology in the construction process.A necessary step for the mass application of BIM-technologies in construction is the use of valuation techniques and information models to formulate requirements to them

Wind regime peculiarities in the lower thermosphere in the winter of 1983/84

Temporal variations of prevailing winds at 90 to 100 km obtained from measurements carried out in winter 1983 to 1984 at three sites in the USSR and two sites in East Germany are reported. These variations are compared with those of the thermal stratospheric regime. Measurements were carried out using the drifts D2 method (meteor wind radar) and the D1 method (ionospheric drifts). Temporal variations of zonal and meridional prevailing wind components for all the sites are given. Also presented are zonal wind data obtained using the partial reflection wind radar. Wind velocity values were obtained by averaging data recorded at between 105 and 91 km altitude. Wind velocity data averaged in such a way can be related to about the same height interval to which the data obtained by the meteor radar and ionospheric methods at other sites, i.e., the mean height of the meteor zone (about 95 km). The results presented show that there are significant fluctuations about the seasonal course of both zonal and meridional prevailing winds

The Treaty on the Prohibition of Nuclear Weapons: Is There a Better Alternative?

INTRODUCTION. Te Treaty on the Prohibition of Nuclear Weapons (TPNW) which came into force in January 2021 divided the international society into two groups: its ardent supporters and opponents. Te vast majority of the parties to the Treaty are the states which have neither nuclear potential, nor political influence in the international nuclear agenda. In contrast, all the nuclear-weapon powers and almost all states with nuclear infrastructures refused to participate in the TPNW. Te Treaty contains an array of legal flaws, does not require any verifcation mechanism or even time-frame for nuclear weapons destruction.MATERIALS AND METHODS. Te study is based on the international treaties in the sphere of nuclear non-proliferation and disarmament, resolutions of international organizations, ofcial statements, and joint documents of the heads of states and of the fve nuclear-weapon states (P5). Materials used for the analysis include scholar works of Russian and foreign researches in the international security law and nuclear law. Te research is based on general methods of study such as systematic approach, induction and deduction, logical forecasting, and specifc methods including historical and legal comparative methods.RESEARCH RESULTS. Te article starts with the history of international efforts of nuclear weapons prohibition and approaches of leading powers. Specifc legal drawbacks inherent in the TPNW were exposed which proves that the Treaty is in fact a legally inconsistent document. At the same time antinuclear attitudes behind the Treaty should be understood and taken into consideration. Tere is a strong need for a constructive alternative to the TPNW.DISCUSSION AND CONCLUSIONS. By comparing the various states’ approaches and legal opinions, the authors come up with a “Road Map” of actions which could become a real counterweight to the hasty and ill-considered decisions to prohibit nuclear weapons. Among those actions is the movement along two parallel tracks. Te frst one is Russian-American talks on further nuclear arms reductions which should include all strategic factors. Te second one is a gradual involvement in the process of other nuclearweapon powers through informal mechanism of consultations of the P5. Te article prescribes how to fll this mechanism with measures of transparency, confdence building and predictability

High precision beam momentum determination in a synchrotron using a spin resonance method

In order to measure the mass of the eta meson with high accuracy using the d+p -> 3He+eta reaction, the momentum of the circulating deuteron beam in the Cooler Synchrotron COSY of the Forschungszentrum Juelich has to be determined with unprecedented precision. This has been achieved by studying the spin dynamics of the polarized deuteron beam. By depolarizing the beam through the use of an artificially induced spin resonance, it was possible to evaluate its momentum p with a precision of dp/p < 10-4 for a momentum of roughly 3 GeV/c. Different possible sources of error in the application of the spin resonance method are discussed in detail and its possible use during a standard experiment is considered.Comment: 10 pages, 6 figures, 2 tables, published versio

KW-Sun: The Konus-Wind Solar Flare Database in Hard X-ray and Soft Gamma-ray Ranges

We present a database of solar flares registered by the Konus-Wind instrument during more than 27 years of operation, from 1994 November to now (2022 June). The constantly updated database (hereafter KW-Sun) contains over 1000 events detected in the instrument's triggered mode and is accessible online at http://www.ioffe.ru/LEA/kwsun/. For each flare, the database provides time-resolved energy spectra in energy range from ~20 keV to ~15 MeV in FITS format along with count rate light curves in three wide energy bands G1 (~20-80 keV), G2 (~80-300 keV), and G3 (~300-1200 keV) with high time resolution (down to 16 ms) in ASCII and IDL SAV formats. This article focuses on the instrument capabilities in the context of solar observations, the structure of the KW-Sun data and their intended usage. The presented homogeneous data set obtained in the broad energy range with high temporal resolution during more than two full solar cycles is beneficial for both statistical and case studies as well as a source of context data for solar flare research.Comment: 10 pages, 6 figures, 1 table. Accepted for publication in ApJ