Investigation of LiFeAs by means of "Break-junction" Technique

In our tunneling investigation using Andreev superconductor - normal metal - superconductor contacts on LiFeAs single crystals we observed two reproducible independent subharmonic gap structures at dynamic conductance characteristics. From these results, we can derive the energy of the large superconducting gap $\Delta_L=(2.5 \div 3.4)$ meV and the small gap $\Delta_L=(0.9 \div 1)$ meV at $T = 4.2$ K for the $T_C^{local} \approx (10.5 \div 14)$ K (the contact area critical temperature which deviation causes the variation of $\Delta_L$). The BCS-ratio is found to be $2\Delta_L/k_BT_C = (4.6 \div 5.6)$, whereas $2\Delta_S/k_BT_C \ll 3.52$ results from induced superconductivity in the bands with the small gap.Comment: 7 pages, 5 figures. Published in Pis'ma v ZhETF 95, 604-610 (2012

Influence of spin structures and nesting on Fermi surface and a pseudogap anisotropy in t-t'-U Hubbard model

Influence of two type of spin structures on the form of the Fermi surface (FS) and a photoemission intensity map is studied for t-t'-U Hubbard model. Mean field calculations are done for the stripe phase and for the spiral spin structure. It is shown, that unlike a case of electron doping, the hole-doped models are unstable with respect to formation of such structures. The pseudogap anisotropies are different for h- and e- doping. In accordance with ARPES data for La2SrxCuO4 the stripe phase is characterized by quasi-one-dimensional segments of FS at k=(\pi,0) and by suppression of spectral weight in diagonal direction. It is shown that spiral structures display the polarisation anisotropy: different segments of FS correspond to electros with different spin polarisations.Comment: 12 pages, 4 figure

STRUCTURE OF IXODES TICK COMMUNITIES AT THE CONTINENTAL PART OF SOUTH PRIMORYE TERRITORY AND RUSSIAN ISLAND

In April-June 2012 a collection and analysis of structure of Ixodes tick communities was performed in various biotopes at the Primorye Territory. Five tick species (Ixodes persulcatus Schulze, 1930, I. pavlovskyi Pomerantzev, 1946, Haemaphysalis concinna Koch, 1844, H. japonica douglasi Nuttall et Warburton 1915, Dermacentor silvarum Olenev, 1932) were revealed. It was shown that I. pavlovskyi was rare at the continental part of the Primorye Territory, but it often happened at the Russian island. On the Continent H. japonica douglasi prevailed over H. concinna in total collections. Correlation of these species at the Russian island was reversed. Distinctions in the structure of Ixodes tick communities, formed due to specificity of ecological conditions and. long enough isolation of the parasites' fauna at the island, could affect the ratio and. features of the causative agents of the human infectious diseases for which the carrier organism serves as the first environment

К вопросу о необходимости оценки качества подготовки выпускаемых специалистов медико-профилактического факультета уральского государственного медицинского университета

В статье предложен один из способов оценки уровня подготовки выпускников медико-профилактического факультета — анализ удовлетворенности работодателей кафедры гигиены и профессиональных болезней по результатам анкетирования руководителей интернов. Представителям работодателей предлагалось оценить навыки интернов в работе с компьютерной техникой, владения письменной и устной речью, профессиональной терминологией, знание порядка функционирования Росротребнадзора. По результатам опроса на кафедре были проведены корректирующие и предупреждающие действия

Epizootiological Survey of the Isle Russian and Measures Necessary for the Prophylaxis of Tick-Born Infections among Population of the Region and Participants of APEC Summit

In spring, 2011 within the frames of epizootiological survey of the Isle Russian territory, identified were five species of Ixodic ticks: Ixodes persulcatus, I. pavlovskyi, Haemaphysalis concinna, H. japonica douglasi, Dermacentor silvarum. Those ticks were infected with the agents of tick-born encephalitis, borreliosis, rickettsiosis, and monocytic ehrlichiosis. Further preparations for the hosting of APEC Summit in the territory of the Isle in September 2012 involve large-scale construction of various facilities, transformation of natural biotopes, and significant increase in population numbers both permanently and temporally residing in the region. In this connection, a complex of preventive measures aimed at protection of local population and participants of the Summit from tick-borne infections is currently under consideration

The results of telecommunication technologies in postgraduate training at the department of hygiene and occupational diseases of USMU

The results of the application of telecommunication technologies in postgraduate training at the Department of Hygiene and Occupational Diseases of the Ural State Medical University. It is shown that the introduction of modern demonstration equipment FLIPBOX (interactive display) for Web conferencing has allowed the Department to expand geography of remote training of physicians. It is planned to use telecommunications technologies in educational postgraduate training on hygiene disciplines in the department.Представлены результаты применения телекоммуникационных технологий в последипломном обучении на кафедре гигиены и профессиональных болезней Уральского государственного медицинского университета. Показано, что внедрение современного демонстрационного оборудования — FLIPBOX (интерактивный дисплей) — для проведения веб-конференций позволило кафедре расширить географию дистанционного обучения врачей. Планируется использование телекоммуникационных образовательных технологий при последипломном обучении по гигиеническим дисциплинам на кафедре

Соединение пластин кремния стеклообразным нанокомпозитом, формируемым золь-гель методом

   Разработан состав стеклообразующей композиции и лабораторная золь-гель технология соединения с ее помощью пластин монокристаллического кремния для создания структур «кремний – изолятор – кремний». Показана возможность снижения температуры формирования качественного соединительного слоя до 1000–1100 °С. Полученные с применением разработанного золь-гель метода стеклокомпозиции могут быть использованы в технологических процессах, требующих формирования неразъемных соединений кремниевых пластин.   We have herein developed a glass-forming composition and the related sol-gel technology for bonding monocrystalline silicon wafers to produce «silicon–insulator–silicon» structures. A possibility to fabricate defect-free glass-like bonding layers at the annealing temperature decreased to 1000–1100 °C is demonstrated. The composites obtained by the sol-gel method can be used in technological processes of formation of the solid compound of silicon wafers.   Разработан состав стеклообразующей композиции и лабораторная золь-гель технология соединения с ее помощью пластин монокристаллического кремния для создания структур «кремний – изолятор – кремний». Показана возможность снижения температуры формирования качественного соединительного слоя до 1000–1100 °С. Полученные с применением разработанного золь-гель метода стеклокомпозиции могут быть использованы в технологических процессах, требующих формирования неразъемных соединений кремниевых пластин

The simulation system for developing and testing protection methods against DDoS-attacks with the ability to connect the real nodes

Abstract. This paper is devoted to simulation system for security process modeling in computer networks. Created system allows to significantly easier construct topologies and scenarios of clients’ behavior for making experiments in comparison of testbed solutions. In addition, system allows embedding known or novel architecture-dependent defense methods on any of network’s nodes and on real server for improving accuracy of experiments