765 research outputs found

    Relation between the X-ray and Optical Luminosities in Binary Systems with Accreting Nonmagnetic White Dwarfs

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    We investigate the relation between the optical (g-band) and X-ray (0.5-10 keV) luminosities of accreting nonmagnetic white dwarfs. According to the present-day counts of the populations of star systems in our Galaxy, these systems have the highest space density among the close binary systems with white dwarfs. We show that the dependence of the optical luminosity of accreting white dwarfs on their X-ray luminosity forms a fairly narrow one-parameter curve. The typical half-width of this curve does not exceed 0.2-0.3 dex in optical and X-ray luminosities, which is essentially consistent with the amplitude of the aperiodic flux variability for these objects. At X-ray luminosities Lx~1e32 erg/sec or lower, the optical g-band luminosity of the accretion flow is shown to be related to its X-ray luminosity by a factor ~2-3. At even lower X-ray luminosities (Lx~1e30 erg/sec), the contribution from the photosphere of the white dwarf begins to dominate in the optical spectrum of the binary system and its optical brightness does not drop below Mg~13-14. Using the latter fact, we show that in current and planned X-ray sky surveys, the family of accreting nonmagnetic white dwarfs can be completely identified to the distance determined by the sensitivity of an optical sky survey in this region. For the Sloan Digital Sky Survey (SDSS) with a limiting sensitivity m_g~22.5, this distance is ~400-600 pcComment: 7 pages, 3 figures, published in Astronomy Letter

    Β«ΠšΠΎΠ½ΡΡ‚Ρ€ΡƒΠΊΡ‚ΠΎΡ€ Π·Π΄ΠΎΡ€ΠΎΠ²ΡŒΡΒ». ΠžΠ±ΠΎΠ±Ρ‰Π΅Π½ΠΈΠ΅ ΠΎΠΏΡ‹Ρ‚Π° формирования Π·Π΄ΠΎΡ€ΠΎΠ²ΡŒΠ΅ΡΠΎΠ·ΠΈΠ΄Π°ΡŽΡ‰Π΅ΠΉ срСды Π² школС Π² МАОУ БОШ β„–11 Π³. Π•ΠΊΠ°Ρ‚Π΅Ρ€ΠΈΠ½Π±ΡƒΡ€Π³Π°

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    Primary prevention, aimed at the formation of value relation to health is an effective method of education of schoolchildren . Our work system includes modularity in the choice of topics and forms of events and records the age of the audience. Active assistants in promoting the preservation of health are members of the school scientific society. Collective projects, in which participants are students of different ages – effective form of promotion of the values of healthΠŸΠ΅Ρ€Π²ΠΈΡ‡Π½Π°Ρ ΠΏΡ€ΠΎΡ„ΠΈΠ»Π°ΠΊΡ‚ΠΈΠΊΠ°, направлСнная Π½Π° Ρ„ΠΎΡ€ΠΌΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ цСнностного ΠΎΡ‚Π½ΠΎΡˆΠ΅Π½ΠΈΡ ΠΊ Π·Π΄ΠΎΡ€ΠΎΠ²ΡŒΡŽ, являСтся эффСктивным ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠΌ обучСния школьников. Наша систСма Π²ΠΊΠ»ΡŽΡ‡Π°Π΅Ρ‚ Π² сСбя ΠΌΠΎΠ΄ΡƒΠ»ΡŒΠ½ΠΎΡΡ‚ΡŒ Π² Π²Ρ‹Π±ΠΎΡ€Π΅ Ρ‚Π΅ΠΌ ΠΈ Ρ„ΠΎΡ€ΠΌ событий с ΡƒΡ‡Π΅Ρ‚ΠΎΠΌ возраста Π°ΡƒΠ΄ΠΈΡ‚ΠΎΡ€ΠΈΠΈ. Активными ΠΏΠΎΠΌΠΎΡ‰Π½ΠΈΠΊΠ°ΠΌΠΈ Π² ΠΏΡ€ΠΎΠ΄Π²ΠΈΠΆΠ΅Π½ΠΈΠΈ ΠΈΠ΄Π΅ΠΈ сохранСния Π·Π΄ΠΎΡ€ΠΎΠ²ΡŒΡ ΡΠ²Π»ΡΡŽΡ‚ΡΡ Ρ‡Π»Π΅Π½Ρ‹ школьного Π½Π°ΡƒΡ‡Π½ΠΎΠ³ΠΎ общСства. ΠšΠΎΠ»Π»Π΅ΠΊΡ‚ΠΈΠ²Π½Ρ‹Π΅ ΠΏΡ€ΠΎΠ΅ΠΊΡ‚Ρ‹, Π² ΠΊΠΎΡ‚ΠΎΡ€Ρ‹Ρ… ΠΏΡ€ΠΈΠ½ΠΈΠΌΠ°ΡŽΡ‚ участиС школьники Ρ€Π°Π·Π½Ρ‹Ρ… возрастов – эффСктивная Ρ„ΠΎΡ€ΠΌΠ° продвиТСния цСнностСй Π·Π΄ΠΎΡ€ΠΎΠ²ΡŒ

    Generating Abstractive Summaries from Meeting Transcripts

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    Summaries of meetings are very important as they convey the essential content of discussions in a concise form. Generally, it is time consuming to read and understand the whole documents. Therefore, summaries play an important role as the readers are interested in only the important context of discussions. In this work, we address the task of meeting document summarization. Automatic summarization systems on meeting conversations developed so far have been primarily extractive, resulting in unacceptable summaries that are hard to read. The extracted utterances contain disfluencies that affect the quality of the extractive summaries. To make summaries much more readable, we propose an approach to generating abstractive summaries by fusing important content from several utterances. We first separate meeting transcripts into various topic segments, and then identify the important utterances in each segment using a supervised learning approach. The important utterances are then combined together to generate a one-sentence summary. In the text generation step, the dependency parses of the utterances in each segment are combined together to create a directed graph. The most informative and well-formed sub-graph obtained by integer linear programming (ILP) is selected to generate a one-sentence summary for each topic segment. The ILP formulation reduces disfluencies by leveraging grammatical relations that are more prominent in non-conversational style of text, and therefore generates summaries that is comparable to human-written abstractive summaries. Experimental results show that our method can generate more informative summaries than the baselines. In addition, readability assessments by human judges as well as log-likelihood estimates obtained from the dependency parser show that our generated summaries are significantly readable and well-formed.Comment: 10 pages, Proceedings of the 2015 ACM Symposium on Document Engineering, DocEng' 201

    Pancreatogenic infections: importance of microbiological monitoring and penetration of antimicrobial chemotherapeutic agents into the pancreas when defining therapeutic approach

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    The review provides the information on the spectrum of microorganisms initiating the development of clinical and morphological forms of pancreatogenic infections. It is shown that when analyzing pathological conditions, no features in the microbiological landscape of the secondary infection in the pancreas and the surrounding extraperitoneal cellular tissue are registere

    ESTIMATES OF REACHABLE SETS OF CONTROL SYSTEMS WITH BILINEAR–QUADRATIC NONLINEARITIES

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    The problem of estimating reachable sets of nonlinear impulsive control systemsΒ with quadratic nonlinearity and with uncertainty in initial states and in the matrix of system is studied. The problem is studied under uncertainty conditions with set – membership description of uncertainΒ variables, which are taken to be unknown but bounded with given bounds.Β We study the case when the system nonlinearity is generated by the combination of two typesΒ of functions in related differential equations, one of which is bilinear and the other oneΒ is quadratic.Β The problem may be reformulated as the problem of describing the motionΒ of set-valued states in the state space under nonlinear dynamics with state velocitiesΒ having bilinear-quadratic kind.Β Basing on the techniques of approximation of the generalized trajectoryΒ tubes by the solutions of control systems without measure terms and usingΒ the techniques of ellipsoidal calculus we present here a state estimation algorithms for the studied nonlinear impulsiveΒ control problem bilinear-quadratic type

    The friction coefficient of polylactic acid films after the low-temperature atmospheric plasma treatment

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    Friction coefficient of polylactic acid films after the plasma treatment

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    Experience of Using the Project Method in a Creative University

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    Π‘Ρ‚Π°Ρ‚ΡŒΡ рассматриваСт возмоТности примСнСния ΠΏΡ€ΠΎΠ΅ΠΊΡ‚Π½ΠΎΠ³ΠΎ ΠΌΠ΅Ρ‚ΠΎΠ΄Π° ΠΏΡ€ΠΈ ΠΈΠ·ΡƒΡ‡Π΅Π½ΠΈΠΈ ΠΏΡ€ΠΎΡ„ΠΈΠ»ΡŒΠ½Ρ‹Ρ… дисциплин Π² творчСском Π²ΡƒΠ·Π΅. На основС ΠΎΠΏΡ‹Ρ‚Π° использования этого ΠΌΠ΅Ρ‚ΠΎΠ΄Π° Π² Ρ€Π°ΠΌΠΊΠ°Ρ… ΡƒΡ‡Π΅Π±Π½ΠΎΠΉ творчСской ΠΏΡ€Π°ΠΊΡ‚ΠΈΠΊΠΈ студСнтов профиля Π΄ΠΈΠ·Π°ΠΉΠ½ ΠΊΠΎΡΡ‚ΡŽΠΌΠ° проводится Π°Π½Π°Π»ΠΈΠ· ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌ ΠΈ пСрспСктив Π΄Π°Π½Π½ΠΎΠ³ΠΎ ΠΏΠΎΠ΄Ρ…ΠΎΠ΄Π° Π² Π²Ρ‹ΡΡˆΠ΅ΠΉ школС.The article considers the possibilities of using the project method in the study of specialized disciplines in a creative university. Based on the experience of using this method in the framework of the educational creative practice of students of the costume design profile, an analysis of the problems and prospects of this approach in higher education is carried out

    EXPERIMENTAL FASHION AS A REPRESENTATIVE REFLECTION OF CULTURE

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    БоврСмСнная ΠΌΠΎΠ΄Π° β€” это Π²ΡΠ΅ΠΎΡ…Π²Π°Ρ‚Ρ‹Π²Π°ΡŽΡ‰Π΅Π΅ ΠΊΡƒΠ»ΡŒΡ‚ΡƒΡ€Π½ΠΎΠ΅ явлСниС. Π‘ появлСниСм массовой ΠΌΠΎΠ΄Ρ‹ Π² сСрСдинС XX Π². стали ΠΏΡ€ΠΎΠ²ΠΎΠ΄ΠΈΡ‚ΡŒΡΡ исслСдования, Π½Π°Ρ†Π΅Π»Π΅Π½Π½Ρ‹Π΅ Π½Π° ΠΏΡ€ΠΎΠ³Π½ΠΎΠ·ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΠ΅ Ρ‚Π΅Π½Π΄Π΅Π½Ρ†ΠΈΠΉ, Ρ‡Ρ‚ΠΎ способствовало ΠΏΡ€ΠΎΠ΅ΠΊΡ‚ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΡŽ коммСрчСского ΠΌΠΎΠ΄Π½ΠΎΠ³ΠΎ ΠΏΡ€ΠΎΠ΄ΡƒΠΊΡ‚Π°. БСгодня модная индустрия сама Π΄ΠΎΠ»ΠΆΠ½Ρ‹ Π±Ρ‹Ρ‚ΡŒ ΠΎΠ±ΡŠΠ΅ΠΊΡ‚ΠΎΠΌ изучСния, Ρ‚Π°ΠΊ ΠΊΠ°ΠΊ ΠΎΠ½Π° ΠΎΡ‚Ρ€Π°ΠΆΠ°Π΅Ρ‚ ваТнСйшиС ΡΠΎΡ†ΠΈΠΎΠΊΡƒΠ»ΡŒΡ‚ΡƒΡ€Π½Ρ‹Π΅ Ρ‚Ρ€Π΅Π½Π΄Ρ‹ ΠΈ ΠΏΡ€ΠΎΠ±Π»Π΅ΠΌΡ‹ общСства.Modern fashion is an all-encompassing cultural phenomenon. With the advent of mass fashion in the middle of the 20th century, studies aimed at forecasting trends began to be conducted, which contributed to the design of a commercial fashion product. Today, the fashion industry itself should be an object of study, as it refl ects the most important socio-cultural trends and problems of society

    Estimates of Reachable Sets of Control Systems with Bilinear–Quadratic Nonlinearities

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    The problem of estimating reachable sets of nonlinear impulsive control systems with quadratic nonlinearity and with uncertainty in initial states and in the matrix of system is studied. The problem is studied under uncertainty conditions with set – membership description of uncertain variables, which are taken to be unknown but bounded with given bounds. We study the case when the system nonlinearity is generated by the combination of two types of functions in related differential equations, one of which is bilinear and the other one is quadratic. The problem may be reformulated as the problem of describing the motion of set-valued states in the state space under nonlinear dynamics with state velocities having bilinear-quadratic kind. Basing on the techniques of approximation of the generalized trajectory tubes by the solutions of control systems without measure terms and using the techniques of ellipsoidal calculus we present here a state estimation algorithms for the studied nonlinear impulsive control problem bilinear-quadratic type.The research was supported by the Russian Foundation for Basic Researches (RFBR) under Project 15-01-02368a, by the Project "Positional Differential Games, Hamilton-Jacobi Equationsand Applications" in the framework of the Research Program "Mathematical Problems of Modern Control Theory" of the Presidium of Russian Academy of Sciences and by the Program "StateSupport of the Leading Scientific School" (NS-2692.2014.1)
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