568 research outputs found

    Selective ICR Heating of Lanthanide Plasma

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    The Vampire and the FOOL

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    This paper presents new features recently implemented in the theorem prover Vampire, namely support for first-order logic with a first class boolean sort (FOOL) and polymorphic arrays. In addition to having a first class boolean sort, FOOL also contains if-then-else and let-in expressions. We argue that presented extensions facilitate reasoning-based program analysis, both by increasing the expressivity of first-order reasoners and by gains in efficiency

    Protein Dynamics Control of Electron Transfer in Photosynthetic Reaction Centers from Rps. Sulfoviridis

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    In the cycle of photosynthetic reaction centers, the initially oxidized special pair of bacteriochlorophyll molecules is subsequently reduced by an electron transferred over a chain of four hemes of the complex. Here, we examine the kinetics of electron transfer between the proximal heme c-559 of the chain and the oxidized special pair in the reaction center from Rps. sulfoviridis in the range of temperatures from 294 to 40 K. The experimental data were obtained for three redox states of the reaction center, in which one, two, or three nearest hemes of the chain are reduced prior to special pair oxidation. The experimental kinetic data are analyzed in terms of a Sumi–Marcus-type model developed in our previous paper,1 in which similar measurements were reported on the reaction centers from Rps. viridis. The model allows us to establish a connection between the observed nonexponential electron-transfer kinetics and the local structural relaxation dynamics of the reaction center protein on the microsecond time scale. The activation energy for relaxation dynamics of the protein medium has been found to be around 0.1 eV for all three redox states, which is in contrast to a value around 0.4–0.6 eV in Rps. viridis.1 The possible nature of the difference between the reaction centers from Rps. viridis and Rps. sulfoviridis, which are believed to be very similar, is discussed. The role of the protein glass transition at low temperatures and that of internal water molecules in the process are analyzed.España, Ministerio de Educación y Ciencia BFU2004-04914-C02-01/BMCJunta de Andalucía PAI CVI-26

    Monitoring as a technology of health care in General education institutions

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    The health care funds for the monitoring must be seen as a goal-oriented process, which takes place during the entire duration of the child in educational institution, regardless of age. The possibility of using such methods of controlling the quality of physical education allows on development of physical training in educational institutionЗдоровьесбережение по средствам мониторинга необходимо рассматривать как целенаправленный процесс, который проходит в течение всего срока обучения ребенка в общеобразовательном учреждении независимо от возраста. Возможность использования такого метода контроля за качеством физического воспитания позволяет судить об уровне физического развития учащихся в общеобразовательном учреждени

    Features of Physical Training Student Engineers

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    Вопрос профессиональной физической подготовки актуален в наше время, особенно в процессе обучения будущих инженеров. Представленные опыт и идейные позиции студентов и преподавателей Технического университета УГМК связанные с особенностями физической подготовки студентов-инженеров, а также разработанные на основе анализа деятельности специалистов в данной сфере деятельности индивидуальные комплексы физических упражнений позволили повысить уровень теоретических знаний и физической подготовленности обучающихся Технического университета УГМК направлений подготовки Горное дело, Технологические машины и оборудование, Электроэнергетика и электротехника, Металлургия и Автоматизация технологических процессов и производств

    SentiRuEval: Testing Object-oriented sentiment analysis systems in Russian

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    The paper describes the data, rules and results of SentiRuEval, evaluation of Russian object-oriented sentiment analysis systems. Two tasks were proposed to participants. The first task was aspect-oriented analysis of reviews about restaurants and automobiles, that is the primary goal was to find word and expressions indicating important characteristics of an entity (aspect terms) and then classify them into polarity classes and aspect categories. The second task was the reputation-oriented analysis of tweets concerning banks and telecommunications companies. The goal of this analysis was to classify tweets in dependence of their influence on the reputation of the mentioned company. Such tweets could express the user's opinion or a positive or negative fact about the organization

    Synthesis and Hydrothermal Study of (Na,K)M2(PO4)3 (M = Ti, Zr, Hf) Solid Solutions

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    (Na,K)M2(PO4)3 (M = Ti, Zr, Hf) continuous solid solutions were synthesized by sol-gel and solidstate methods. Cation-exchange reactions in the NaM2(PO4)3–KM2(PO4)3–NaCl–KCl–H2O systems were studied at T = 723 – 973 K and p = 100–200 MPa. The concentration dependences of unit cell parameters of the studied phosphates were found. The sodium/potassium distribution coefficients in the phosphate-fluid systems were functions of the solid solution compositions, that is, the systems behave nonideally. The excess volumes and excess Gibbs functions of solid solutions mixing were fitted to thirdorder polynomials and described in terms of the Margules model. From the comparison of the results obtained Ti-, Zr-, and Hf-systems, we made the conclusion that the titanium phosphates show greater nonideality than zirconium and hafnium phosphates and lower thermodynamic stability to decomposition to double phosphates at high pressures and temperatures
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