Laser beam welding of a CoCrFeNiMn-type high entropy alloy produced by self-propagating high-temperature synthesis

Fiber laser beam welding of a CoCrFeNiMn-type high entropy alloy (HEA) produced by self-propagating hightemperature synthesis (SHS) was reported in this work. The SHS-fabricated alloy was characterized by both ∼2 times reduced Mn content in comparison with that of the other principal components and the presence of impurities including Al, C, S, and S

Investigations of Bis-chromophore Systems: Relationship between Spectral Behaviour and Charge Transfer in 2-(3-coumaroyl)-benzopyrylium Perchlorates

The dependence of spectral properties and interfragmental charge transfer (ICT) on excitation, relaxation and excited state deactivation of 2-(3-cou­maroyl)-benzopyry­lium perchlorates has been analyzed. It was found that the positions of emission bands and rate constants of radiationless deactivation linearly correlate with ICT upon excited state deactivation, and Stokes’ shifts of fluorescence demonstrate linear dependence on ICT upon structural relaxation in the excited state

Patterns of economically safe restructuring of Russian industry

The purpose of the article is to propose the main patterns of restructuring (structural changes) of the Russian industrial economy. The task of the study is to reveal the essence and substantiation of each of the formulated patterns. The subject of the publication is the organizational and economic relations arising during the safe restructuring of the Russian industry. The methodology of the study proceeds from objectively existing, recurring, significant dynamic, static or combined relationships and dependencies of phenomena and processes of social production, which characterize the increase in the aggregate result of the country’s industrial system functioning. The main results are reduced to the definition of nine patterns of economically safe restructuring with the justification of each of them and the specification of their essence. Their scientific understanding is quite applicable both in educational institutions of the country in the study of economic theory and security, the restructuring of the industrial economy, and the economic practice of structural changes at all government levels. A general conclusion has been formed, expressing the content of the main patterns of safe industrial restructuring as an economic concept and its objective foundations

Regularities of the metallurgical industry restructuring process: Content, safety and regulation

The purpose of the work is to reveal the content, safety and regulation of the metallurgical industry restructuring. The objectives of the article are to generalize the theory and methods that characterize the essence of the designated industry restructuring regularities, the main directions of their safe implementation and regulation. The subject of the publication defines the organizational and economic relations arising during the implementation of the Russian metallurgy safe restructuring. The methodology of the study proceeds from objectively recurring significant relationships and dependencies that arise in the metallurgical industry restructuring process, the main link of its economy. The key results are reduced to determining a number of regularities of restructuring, its essence, features, priorities, clustering and ways of safe regulation by the state. Their scientific understanding is quite applicable both in educational institutions of the country when studying the theory and methodology of economic science, methods of restructuring of various sectors of the economy, and in real practice of structural changes at all levels of government. In conclusion, a number of findings are formed, reflecting both the content and safety of the restructuring of metallurgy and the corresponding laws, and the regulation of these processes

The ultraluminous GRB 110918A

GRB 110918A is the brightest long GRB detected by Konus-WIND during its 19 years of continuous observations and the most luminous GRB ever observed since the beginning of the cosmological era in 1997. We report on the final IPN localization of this event and its detailed multiwavelength study with a number of space-based instruments. The prompt emission is characterized by a typical duration, a moderare $E_{peak}$ of the time-integrated spectrum, and strong hard-to-soft evolution. The high observed energy fluence yields, at z=0.984, a huge isotropic-equivalent energy release $E_{iso}=(2.1\pm0.1)\times10^{54}$ erg. The record-breaking energy flux observed at the peak of the short, bright, hard initial pulse results in an unprecedented isotropic-equivalent luminosity $L_{iso}=(4.7\pm0.2)\times10^{54}$erg s$^{-1}$. A tail of the soft gamma-ray emission was detected with temporal and spectral behavior typical of that predicted by the synchrotron forward-shock model. Swift/XRT and Swift/UVOT observed the bright afterglow from 1.2 to 48 days after the burst and revealed no evidence of a jet break. The post-break scenario for the afterglow is preferred from our analysis, with a hard underlying electron spectrum and ISM-like circumburst environment implied. We conclude that, among multiple reasons investigated, the tight collimation of the jet must have been a key ingredient to produce this unusually bright burst. The inferred jet opening angle of 1.7-3.4 deg results in reasonable values of the collimation-corrected radiated energy and the peak luminosity, which, however, are still at the top of their distributions for such tightly collimated events. We estimate a detection horizon for a similar ultraluminous GRB of $z\sim7.5$ for Konus-WIND, and $z\sim12$ for Swift/BAT, which stresses the importance of GRBs as probes of the early Universe.Comment: 22 pages, 20 figures, accepted for publication in Ap