5,292 research outputs found

    Tunka Advanced Instrument for cosmic rays and Gamma Astronomy

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    The paper is a script of a lecture given at the ISAPP-Baikal summer school in 2018. The lecture gives an overview of the Tunka Advanced Instrument for cosmic rays and Gamma Astronomy (TAIGA) facility including historical introduction, description of existing and future setups, and outreach and open data activities.Comment: Lectures given at the ISAPP-Baikal Summer School 2018: Exploring the Universe through multiple messengers, 12-21 July 2018, Bol'shie Koty, Russi

    Measurement of the Pion Form Factor in the Energy Range 1.04-1.38 GeV with the CMD-2 Detector

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    The cross section for the process e+eπ+πe^+e^-\to\pi^+\pi^- is measured in the c.m. energy range 1.04-1.38 GeV from 995 000 selected collinear events including 860000 e+ee^+e^- events, 82000 μ+μ\mu^+\mu^- events, and 33000 π+π\pi^+\pi^- events. The systematic and statistical errors of measuring the pion form factor are equal to 1.2-4.2 and 5-13%, respectively.Comment: 5 pages, 2 figure

    The FLASHForward Facility at DESY

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    The FLASHForward project at DESY is a pioneering plasma-wakefield acceleration experiment that aims to produce, in a few centimetres of ionised hydrogen, beams with energy of order GeV that are of quality sufficient to be used in a free-electron laser. The plasma wave will be driven by high-current density electron beams from the FLASH linear accelerator and will explore both external and internal witness-beam injection techniques. The plasma is created by ionising a gas in a gas cell with a multi-TW laser system, which can also be used to provide optical diagnostics of the plasma and electron beams due to the <30 fs synchronisation between the laser and the driving electron beam. The operation parameters of the experiment are discussed, as well as the scientific program.Comment: 19 pages, 9 figure

    Formation of a digital educational environment in the practical classes at the Department of Histology (On example of the Ural State Medical University)

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    The article provides the experience of the Department of Histology of the Ural State Medical University (USMU) in creating a digital educational environment in practical histology classes. Most of the class time is devoted to work using individual microscopes and sets of histological preparations. Students consider it correct and quite effective to use full‑slide images of micropreparations as an additional educational resource in the study. A promising area of work on the digitalization of the educational process at the Department of Histologyof the USMU is the placement of developed digital educational products (gallery, atlas of full‑slide images of micropreparations) and methodological support for them in the public domain on the USMU server.В статье обобщен опыт работы кафедры гистологии Уральского государственного медицинского университета (УГМУ) по созданию цифровой образовательной среды в рамках практических занятий, определены факторы, ускорившие цифровизацию. Большая часть времени занятий отводится на работу с использованием индивидуальных микроскопов и наборов гистологических препаратов. Студенты считают правильным и достаточно эффективным применение оцифрованных микропрепаратов в качестве дополнительного обучающего ресурса при изучении микропрепаратов. Перспективным направлением работы по цифровизации образовательного процесса на кафедре гистологии УГМУ является размещение разработанных цифровых образовательных продуктов (галереи, атласа полнослайдовых изображений микропрепаратов) и методического сопровождения к ним в открытом доступе на сервере УГМУ

    Nuclear Polarization of Molecular Hydrogen Recombined on a Non-metallic Surface

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    The nuclear polarization of H2\mathrm{H}_2 molecules formed by recombination of nuclear polarized H atoms on the surface of a storage cell initially coated with a silicon-based polymer has been measured by using the longitudinal double-spin asymmetry in deep-inelastic positron-proton scattering. The molecules are found to have a substantial nuclear polarization, which is evidence that initially polarized atoms retain their nuclear polarization when absorbed on this type of surfac
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