358 research outputs found

    Стадії Укладання Договору Поставки За Державним Замовленням На Конкурентних Засадах

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    The article is devoted to theoretical and practical problems of legal regulation of the stages of the contract for the supply of goods under the state order. Particular attention is paid to the concept of the conclusion of a contract, its legal nature; the selection of the stages of conclusion of the contract for the supply of goods by public order on a competitive basis.Стаття присвячена теоретичним та практичним проблемам правового ре­гулювання стадіям укладення договору поставки товарів за державним замов­ленням. Особливу увагу приділено питанням поняття укладення договору, його правової природи; виділенню стадій укладання договору поставки товарів за державним замовленням на конкурсних засадах

    Ways to Enhance Environmental Flat Grinding by Improving the Technology of the Coolant Supply

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    AbstractThe present article includes the analysis of coolant supplying for flat grinding with the grinding wheel face; we discuss questions, related to development of combined methods of coolant supplying. Article presents the method and theoretical justification of forming the coolant bath in the working area of the flat grinding machine. Article also includes justification of the new coolant function – recovering. This function involves grinding waste neutralizing in the cutting area, and is evaluated by limiting concentration of the harmful substances in the machine working area

    Physical and Chemical Fundamentals and Technical Solutions for Recovery of Non-ferrous and Rare Metals from Industrial Wastes

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    The increasing demand for zinc and a range of zinc-related metals (for example: lead; indium; tin; cadmium; and copper) in the Russian Federation cannot be satisfied by the existing production plants due to the lack of raw materials. At the same time, ferrous and non-ferrous metallurgy and the chemical industry have accumulated hundreds of millions of tons of zinc wastes (falling into the hazard categories 2 to 4), the processing of which could not only make up the raw material base, but also improve the environmental situation. In the world, over 85% of ferrous dust is recycled using the Waelz process. The Waeltz process is used for distilling separation of elements under reducing conditions. In this study, a block diagram for production of the following elements from industrial wastes is proposed: zinc, cadmium and indium in form of massive metals; zinc and indium in the form of fine powders; and clinker as a raw material for cement production. The technical and scientific details of this new process have been patented in the Russian Federation and abroad. For the first time, the following operations have been implemented with the use of large-sized Waelz kilns: vapour-oxidized Waeltz treatment of polymetallic wastes; recycling of heat from gases and solid products with generation of process fumes; and implementation of alternative flux (dolomite) and alternative fuel (petroleum coke). Keywords: Waelz process, industrial wastes, heat recycling, vapour-oxidized Waelz processin

    Formation of the current attachments in plasma accelerator channel under influence of the longitudinal magnetic field

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    Results of numerical simulations of axisymmetric plasma flows in accelerator channel with longitudinal magnetic field are presented. The investigations of two-dimensional flows are carried out within the framework of onecomponent MHD-model and two-component model taking into account the Hall effect. It is found that the current attachments are appeared in case of respective strong longitudinal magnetic field

    Геморрагическая лихорадка с почечным синдромом в белорусском Полесье.

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    Представлены результаты проведенного эколого–эпидемиологического изучения геморрагической лихорадки с почечным синдромом (ГЛПС) в регионе белорусского Полесья за период с 1987 по 2011 гг. Всего за данный период заболело 108 человек. Все случаи заболеваний населения ГЛПС регистрируются в осенне–зимний период. Иммунная прослойка населения колеблется от 0,5 до 8,3% в Гомельской области и от 1,3 до 10,4% в Брестской области. Инфицированность вирусом мышевидных грызунов и насекомоядных достигает 2,0–11,7%. Приведенные данные свидетельствуют об активной циркуляции возбудителя ГЛПС на территории белорусского Полесья. = We present the results of the eco–epidemiological study of hemorrhagic fever with renal syndrome (HFRS) in the Polesie region for the period from 1987 to 2011. Total for this period 108 people fell ill. All cases of diseases of the population are registered with HFRS in autumn–winter period. The immune stratum of the population ranges from 0.5 to 8.3% in the Gomel region, and from 1.3 to 10.4 % in Brest region. Virus infection of murine rodents and insectivores reaches 2,0 – 11,7%. These data indicate about the active circulation of the causative agent of HFRS in belarusian Polesie

    The last integrable case of kozlov-Treshchev Birkhoff integrable potentials

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    We establish the integrability of the last open case in the Kozlov-Treshchev classification of Birkhoff integrable Hamiltonian systems. The technique used is a modification of the so called quadratic Lax pair for DnD_n Toda lattice combined with a method used by M. Ranada in proving the integrability of the Sklyanin case.Comment: 13 page

    Туляремия в Белорусском Полесье. Часть II. Период 2001–2015 гг.

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    Проведен анализ эпидемической и эпизоотической ситуации по туляремии на территории белорусского Полесья с хронологической глубиной исследования 15 лет (2001–2015 гг.). Полученные результаты подтверждают циркуляцию Francisella tularensis в регионе.We analyzed epidemiological and epizootic situation of tularemia (rabbit fever) on the territory of Belarusian Polesie in 15 years (2001 - 2015). The results confirm the circulation of Francisella tularensis in the region

    Coherent \pi^0 threshold production from the deuteron at Q^2 = 0.1 GeV^2/c^2

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    First data on coherent threshold \pi^0 electroproduction from the deuteron taken by the A1 Collaboration at the Mainz Microtron MAMI are presented. At a four-momentum transfer of q^2=-0.1 GeV^2/c^2 the full solid angle was covered up to a center-of-mass energy of 4 MeV above threshold. By means of a Rosenbluth separation the longitudinal threshold s wave multipole and an upper limit for the transverse threshold s wave multipole could be extracted and compared to predictions of Heavy Baryon Chiral Perturbation Theory.Comment: 7 pages, 7 figures, latex2

    Far-infrared vibrational properties of high-pressure-high-temperature C60 polymers and the C60 dimer

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    We report high-resolution far-infrared transmission measurements of the 2 + 2 cycloaddition C-60 dimer and two-dimensional rhombohedral and one-dimensional orthorhombic high-pressure high-temperature C60 polymers. In the spectral region investigated(20-650 cm(-1)), we see no low-energy interball modes, but symmetry breaking of the linked C-60 balls is evident in the complex spectrum of intramolecular modes. Experimental features suggest large splittings or frequency shifts of some IhC60-derived modes that are activated by symmetry reduction, implying that the balls are strongly distorted in these structures. We have calculated the vibrations of all three systems by first-principles quantum molecular dynamics and use them to assign the predominant IhC60 symmetries of observed modes. Pur calculations show unprecedentedly large downshifts of T-1u(2)-derived modes and extremely large splittings of other modes, both of which are consistent with the experimental spectra. For the rhombohedral and orthorhombic polymers, the T-1u(2)-derived mode that is polarized along the bonding direction is calculated to downshift below any T-1u(1)-derived modes. We also identify a previously unassigned feature near 610 cm(-1) in all three systems as a widely split or shifted mode derived from various silent IhC60 vibrations, confirming a strong perturbation model for these linked fullerene structures

    Pulse-Shape discrimination with the Counting Test Facility

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    Pulse shape discrimination (PSD) is one of the most distinctive features of liquid scintillators. Since the introduction of the scintillation techniques in the field of particle detection, many studies have been carried out to characterize intrinsic properties of the most common liquid scintillator mixtures in this respect. Several application methods and algorithms able to achieve optimum discrimination performances have been developed. However, the vast majority of these studies have been performed on samples of small dimensions. The Counting Test Facility, prototype of the solar neutrino experiment Borexino, as a 4 ton spherical scintillation detector immersed in 1000 tons of shielding water, represents a unique opportunity to extend the small-sample PSD studies to a large-volume setup. Specifically, in this work we consider two different liquid scintillation mixtures employed in CTF, illustrating for both the PSD characterization results obtained either with the processing of the scintillation waveform through the optimum Gatti's method, or via a more conventional approach based on the charge content of the scintillation tail. The outcomes of this study, while interesting per se, are also of paramount importance in view of the expected Borexino detector performances, where PSD will be an essential tool in the framework of the background rejection strategy needed to achieve the required sensitivity to the solar neutrino signals.Comment: 39 pages, 17 figures, submitted to Nucl. Instr. Meth.
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