495 research outputs found

    Prevalence of Diseases Among Children Population in Dnepropetrovsk Region (Ukraine), Correlated with Deterioration of Drinking Water Quality

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    Цель исследования – изучение динамики распространённости заболеваний среди детского населения сельских таксонов области и корреляционный анализ показателей качества питьевой воды с некоторыми показателями распространённости болезней. Изучено общее количество (522720 показателей) распространённости болезней среди детей в 6 типах таксонов Днепропетровской области (Украина) за 2008-2013 гг. Доказано, что болезни I, II, III, XI, XIII, XIV классов являются приоритетными по распространенности в большинстве сельских таксонов. Показана корреляционная связь между повышенным солевым составом питьевой воды из децентрализованных источников, содержанием отдельных тяжёлых металлов (Zn, Cu, Mn) и некоторыми веществами (pH, F, Al, азот аммиака, нитриты, нитраты, окисляемость) с распространённостью среди детей новообразований (r=0,87); болезней крови и органов кроветворения (r=0,74–0,95); анемии (r=0,79-0,87); болезней мочеполовой системы (r=0,79- 0,82); врожденных аномалий (r=0,87), в том числе системы кровообращения (r=0,74-0,95) в некоторых таксонах Днепропетровской области (p<0,001). Purpose of research was to study dynamics prevalence of diseases among children’ population in the separate rural tacsons of Dnepropetrovsk region; to carry out correlation analysis between some indicators of drinking water quality and prevalence of diseases. Research indicators of prevalence of diseases was carried out in the 6 types of tacsons of Dnipropetrovsk region (Ukraine) during 2008 – 2013 years (totally 522720 indicators). It was proved that (I, II, III, XI, XIII, XIV) classes of diseases takes the クrst place by the prevalence of diseases in the majority of rural tacsons. Correlation between higher salt content of the potable water taking from decentralized sources and content of some heavy metals (Zn, Cu, Mn) and some substances (pH, F, Al, nitrogen ammonia, nitrites, nitrates, oxidability) and the prevalence of diseases among children: tumors (r=0.87); diseases of blood and hematopoetic organs (r=0.74–0.95); anemia (r=0.79–0.87); diseases of genitourinary system (r=0.79–0.82); congenital anomalies (r=0.87), including circulatory system (r=0.74–0.95) was revealed in the separate tacsons of Dnepropetrovsk region (p<0.001)

    Matériel didactique pour les cours pratiques et les séminaires au sujet de la " Sécurité du travail dans le secteur médical" pour les étudiants de la 2ème année de la spécialité "Médecine"(niveau de formation du master)

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    Le but de l'enseignement de la discipline "Sécurité du travail dans le secteur médical" est la formation des futurs professionnels des connaissances et des compétences nécessaires pour assurer la gestion de la sécurité du travail efficace dans le secteur médical et la création de conditions favorables de l'environnement de travail et de la sécurité dans le secteur en vertu de la législation en vigueur et d'autres actes juridiques réglementaires, correspondant aux objectifs finaux de l'étude de la discipline en conformité avec "Standard de la formation supérieure" du cours "222. Médecine.

    Guidline for practical and seminar studies on the discipline “Labor protection in medical branch” for the 3 courses students, speciality “Dentistry” (Master’s degree of preparation)

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    Purpose of practical training discipline “Labor protection in the medical branch” is formation among future specialists knowledge and abilities for providing effective management over labor in medical industry and creation favorable environmental conditions in stomatological practice according to official normative legal acts, which correspond to the goals of a discipline according to “Higher educational standard” in “Dentistry”

    Vlasov-Maxwell, self-consistent electromagnetic wave emission simulations in the solar corona

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    1.5D Vlasov-Maxwell simulations are employed to model electromagnetic emission generation in a fully self-consistent plasma kinetic model for the first time in the solar physics context. The simulations mimic the plasma emission mechanism and Larmor drift instability in a plasma thread that connects the Sun to Earth with the spatial scales compressed appropriately. The effects of spatial density gradients on the generation of electromagnetic radiation are investigated. It is shown that 1.5D inhomogeneous plasma with a uniform background magnetic field directed transverse to the density gradient is aperiodically unstable to Larmor-drift instability. The latter results in a novel effect of generation of electromagnetic emission at plasma frequency. When density gradient is removed (i.e. when plasma becomes stable to Larmor-drift instability) and a lowlow density, super-thermal, hot beam is injected along the domain, in the direction perpendicular to the magnetic field, plasma emission mechanism generates non-escaping Langmuir type oscillations which in turn generate escaping electromagnetic radiation. It is found that in the spatial location where the beam is injected, the standing waves, oscillating at the plasma frequency, are excited. These can be used to interpret the horizontal strips observed in some dynamical spectra. Quasilinear theory predictions: (i) the electron free streaming and (ii) the beam long relaxation time, in accord with the analytic expressions, are corroborated via direct, fully-kinetic simulation. Finally, the interplay of Larmor-drift instability and plasma emission mechanism is studied by considering densedense electron beam in the Larmor-drift unstable (inhomogeneous) plasma. http://www.maths.qmul.ac.uk/~tsiklauri/movie1.mpg * http://www.maths.qmul.ac.uk/~tsiklauri/movie2.mpg * http://www.maths.qmul.ac.uk/~tsiklauri/movie3.mpgComment: Solar Physics (in press, the final, accepted version

    Development of alternatives for accelerating structure in the range of intermediate proton energy

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    A scope of the linear accelerating structures for acceleration proton high rower beams in energy range 5… 100 MeV is presented. Main task lies in a possibility to use superconductive equipment. The results are given for +original desgn of accelerating structures of alternating segments being excited on E11-wave on π/2-mode. A possibility is discussed about the use of focusing blocks with the RF–quadrupoles which uniformly fit into the chain of accelerating cells.Приводиться огляд розробок конструкцій структур лінійних прискорювачів протонів з високою потужністю пучка в діапазоні енергій 5...100 МеВ. Основна вимога полягає в можливості використання надпровідної техніки. Описані результати оригінальних розробок прискорюючої структури типу зустрічних сегментів, що збуджується на Е11-хвилі, а також можливість застосування фокусуючих блоків з ВЧ-квадруполями, які однорідно вписуюються в цепочку прискорюючих комірок.Приводится обзор разработок конструкций структур линейных ускорителей протонов с большой мощностью пучка в диапазоне энергий 5...100 МэВ. Главная задача заключается в возможности использования сверхпроводящей техники. Описаны результаты оригинальных разработок ускоряющей структуры типа встречных сегментов, возбуждаемой на Е11-волне, и возможность применения фокусирующих блоков с ВЧ – квадруполями, которые однородно вписываются в цепочку ускоряющих ячеек

    Self-organized criticality in deterministic systems with disorder

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    Using the Bak-Sneppen model of biological evolution as our paradigm, we investigate in which cases noise can be substituted with a deterministic signal without destroying Self-Organized Criticality (SOC). If the deterministic signal is chaotic the universality class is preserved; some non-universal features, such as the threshold, depend on the time correlation of the signal. We also show that, if the signal introduced is periodic, SOC is preserved but in a different universality class, as long as the spectrum of frequencies is broad enough.Comment: RevTex, 8 pages, 8 figure

    Search for direct production of charginos and neutralinos in events with three leptons and missing transverse momentum in √s = 7 TeV pp collisions with the ATLAS detector

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    A search for the direct production of charginos and neutralinos in final states with three electrons or muons and missing transverse momentum is presented. The analysis is based on 4.7 fb−1 of proton–proton collision data delivered by the Large Hadron Collider and recorded with the ATLAS detector. Observations are consistent with Standard Model expectations in three signal regions that are either depleted or enriched in Z-boson decays. Upper limits at 95% confidence level are set in R-parity conserving phenomenological minimal supersymmetric models and in simplified models, significantly extending previous results

    Jet size dependence of single jet suppression in lead-lead collisions at sqrt(s(NN)) = 2.76 TeV with the ATLAS detector at the LHC

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    Measurements of inclusive jet suppression in heavy ion collisions at the LHC provide direct sensitivity to the physics of jet quenching. In a sample of lead-lead collisions at sqrt(s) = 2.76 TeV corresponding to an integrated luminosity of approximately 7 inverse microbarns, ATLAS has measured jets with a calorimeter over the pseudorapidity interval |eta| < 2.1 and over the transverse momentum range 38 < pT < 210 GeV. Jets were reconstructed using the anti-kt algorithm with values for the distance parameter that determines the nominal jet radius of R = 0.2, 0.3, 0.4 and 0.5. The centrality dependence of the jet yield is characterized by the jet "central-to-peripheral ratio," Rcp. Jet production is found to be suppressed by approximately a factor of two in the 10% most central collisions relative to peripheral collisions. Rcp varies smoothly with centrality as characterized by the number of participating nucleons. The observed suppression is only weakly dependent on jet radius and transverse momentum. These results provide the first direct measurement of inclusive jet suppression in heavy ion collisions and complement previous measurements of dijet transverse energy imbalance at the LHC.Comment: 15 pages plus author list (30 pages total), 8 figures, 2 tables, submitted to Physics Letters B. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/HION-2011-02

    Search for displaced vertices arising from decays of new heavy particles in 7 TeV pp collisions at ATLAS

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    We present the results of a search for new, heavy particles that decay at a significant distance from their production point into a final state containing charged hadrons in association with a high-momentum muon. The search is conducted in a pp-collision data sample with a center-of-mass energy of 7 TeV and an integrated luminosity of 33 pb^-1 collected in 2010 by the ATLAS detector operating at the Large Hadron Collider. Production of such particles is expected in various scenarios of physics beyond the standard model. We observe no signal and place limits on the production cross-section of supersymmetric particles in an R-parity-violating scenario as a function of the neutralino lifetime. Limits are presented for different squark and neutralino masses, enabling extension of the limits to a variety of other models.Comment: 8 pages plus author list (20 pages total), 8 figures, 1 table, final version to appear in Physics Letters

    Measurement of the polarisation of W bosons produced with large transverse momentum in pp collisions at sqrt(s) = 7 TeV with the ATLAS experiment

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    This paper describes an analysis of the angular distribution of W->enu and W->munu decays, using data from pp collisions at sqrt(s) = 7 TeV recorded with the ATLAS detector at the LHC in 2010, corresponding to an integrated luminosity of about 35 pb^-1. Using the decay lepton transverse momentum and the missing transverse energy, the W decay angular distribution projected onto the transverse plane is obtained and analysed in terms of helicity fractions f0, fL and fR over two ranges of W transverse momentum (ptw): 35 < ptw < 50 GeV and ptw > 50 GeV. Good agreement is found with theoretical predictions. For ptw > 50 GeV, the values of f0 and fL-fR, averaged over charge and lepton flavour, are measured to be : f0 = 0.127 +/- 0.030 +/- 0.108 and fL-fR = 0.252 +/- 0.017 +/- 0.030, where the first uncertainties are statistical, and the second include all systematic effects.Comment: 19 pages plus author list (34 pages total), 9 figures, 11 tables, revised author list, matches European Journal of Physics C versio
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