A measurement of the \u3ci\u3eWγ\u3c/i\u3e cross section at √S = 8 TEV in \u3ci\u3ePP\u3c/i\u3e collisions with the CMS detector

A measurement of cross section of the Wγ → lνγ production in proton-proton collisions using 19.6 fb − 1 of LHC data collected by CMS detector at the center- √ of-mass collision energy of s = 8 TeV is reported. The W bosons are identified in their electron and muon decay modes. The process of Wγ production in the Standard Model (SM) involves a pure gauge boson coupling, a WWγ vertex, which allows one to test the electroweak sector of the SM in a unique way not achievable by studies of other processes. In addition to the total cross section, we measure the differential cross section of Wγ production as a function of a photon transverse momentum. The measurement of the differential cross section is a sensitive probe for new physics originating from an anomalous gauge coupling because possible effects of its presence increase with the photon transverse momentum and, thus, are more likely to be observed in the differential than in the total cross section. The results of this measurement agree with the Standard Model prediction at NLO in QCD, and no evidence of an anomalous triple gauge coupling has been observed. The reported total cross section measurement is the first measurement of this quantity at the 8 TeV collision energy with CMS data. The differential cross section measurement discussed in this dissertation is the first ever measurement of this process performed by CMS since the start of the LHC. Adviser: Ilya Kravchenk

Machine learning methods for the search for L&T brown dwarfs in the data of modern sky surveys

According to various estimates, brown dwarfs (BD) should account for up to 25 percent of all objects in the Galaxy. However, few of them are discovered and well-studied, both individually and as a population. Homogeneous and complete samples of brown dwarfs are needed for these kinds of studies. Due to their weakness, spectral studies of brown dwarfs are rather laborious. For this reason, creating a significant reliable sample of brown dwarfs, confirmed by spectroscopic observations, seems unattainable at the moment. Numerous attempts have been made to search for and create a set of brown dwarfs using their colours as a decision rule applied to a vast amount of survey data. In this work, we use machine learning methods such as Random Forest Classifier, XGBoost, SVM Classifier and TabNet on PanStarrs DR1, 2MASS and WISE data to distinguish L and T brown dwarfs from objects of other spectral and luminosity classes. The explanation of the models is discussed. We also compare our models with classical decision rules, proving their efficiency and relevance.Comment: 12 pages, 10 figures, Accepted for publication in Astronomy and Computin

Aspects of Study of the 20th Century Naive Art in Russia: Researchers, Collections and Names

This article explores the main stages of the study of naive art in Russia, starting from the first decades of the 20th century and till the 1980s, when naive art was called an “amateur art”. This is the period of IZORAM (Saint Petersburg Art Workshops of Working Youth) activity and the long work of the National University of Extramural Studies. The first amateur art exhibitions took place in the 1970s, later leading to the establishment of specialized collections. In the 1980s, academic research into naive art began to filter through the image of a primitive, or so-called “third”, culture supposed to exist between “high” and “grassroots” art. Only since the 1990s has naive art begun to be perceived as a separate artistic movement. In Russian art criticism, naive art was defined as one of the primitive art areas of the eighteenth to twentieth centuries. During this period, separate museum collections began to take shape in Moscow including a private museum of outsider art, where some works by naive artists were presented, and the Municipal Museum of Naive Art. In Ekaterinburg, Gamayun Municipal Center for Folk Art and Crafts began to study naive art in 1994. In the 2000s, interest in the naive art of the 20th century began to grow. At this time, public and private collections of naive art were being formed in the following museums: B.U.Kashkin Museum at the Ural State University; Soviet Naive Art Museum; and Museum of Naive Art, which in 2015 became the part of the Yekaterinburg Museum of Fine Arts. Keywords: primitive art, amateur art, naive art, folk art, outsider art

Study of rapitalam influence on oxotremorine-induced tremor

Of the article is to study Rapitalam influence on the oxotremorine-induced tremor in rat

Latent Transformatin of Generations Existence in Smart Society

The rapid development of information technologies in the formation of online or digital environments has a significant impact on the transformation of society contributing to the development of Smart society. This is largely due to the formation of a Smart environment based on the introduction of new technologies. In changing the patterns of social life, these new technologies require and stimulate the transformation of social norms and values. For example, simplified communication between people, expressed in the transfer of instant messages through mobile applications (messengers) gains popularity. Such messages replace verbal communication through mobile devices. The use of modern digital technologies contributes to developing new characteristics of activities, for example, multitasking, which is expressed in the ability to conduct several conversations and perform several actions in parallel. The aim of this study is to find the main trends and differences, and predict the behavior patterns of different age groups in the process of forming a Digital society. Changes can happen swiftly or slowly, in part determined by the speed of release of new information products. There is a latent transformation of generations’ existence in modern society from natural to imposed forced skills against the backdrop of these technological transformations. This research has identified the differences in the perception and attitude of different age groups to this transformation. Keywords: Smart society, Digital society, smart environment, digital medi

The Principles and Approach Support the Mapping of the Personal Study Pathway in Electronic Educational Environments

AbstractIn this paper the authors examine the theoretical background of formation of personalized strategies in electronic educational environment. It is assumed that personal study pathway is a conscious “design” of the student competence profile. The article designates parameters, which later will form the basis for constructing model of personal study pathway. Therefore the paper consists of several sections that propose (1) general topics of the approach; (2) the principles and the general model for supporting of mapping of the personal study pathway in electronic educational environment; (3) report on approach application in progres