1,662 research outputs found

    Representation and usage of knowledge for initialization of accelerator control equipment

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    A knowledge based application, called SETUP, to initialize and diagnose the CERN/PS accelerators' control equipment is described. The object model and the general features of control algorithms are presented, together with their relation to the knowledge description of the setting up of the system. The different ways of the integration of the SETUP in the control system are outlined

    Temperature independent diffuse scattering and elastic lattice deformations in relaxor PbMg1/3Nb2/3O3

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    The results of diffuse neutron scattering experiment on PbMg1/3Nb2/3O3 single crystal above the Burns temperature are reported. It is shown that the high temperature elastic diffuse component is highly anisotropic in low-symmetry Brillouin zones and this anisotropy can be described using Huang scattering formalism assuming that the scattering originates from mesoscopic lattice deformations due to elastic defects. The qualitative agreement between this model and the experimental data is achieved with simple isotropic defects. It is demonstrated that weak satellite maxima near the Bragg reflections can be interpreted as the finite resolution effect.Comment: 7 pages, 7 figure

    Simulation of non-stationary processes in industrial centrifugal cascades of uranium enrichment

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    The mathematical model of non-stationary dividing processes of uranium enrichment in industrial centrifugal cascades which can be used in a computer simulator to prepare experts in dividing production and application as an expert system in the automated control system of technological circuit has been developed and realized

    АЛГОРИТМ ОЦЕНКИ КЛИНИЧЕСКОЙ АНАТОМИИ КРЫЛОНЁБНОГО КАНАЛА С ИСПОЛЬЗОВАНИЕМ КОНУСНО-ЛУЧЕВОЙ КОМПЬЮТЕРНОЙ ТОМОГРАФИИ

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    Computed tomography is required as a rhinologic patients preoperative evaluation method and allows to assess the topographical features of anatomical structures. The study developed an algorithm for assessing the patients pterygopalatine canal clinical anatomy to improve the efficiency and sefety of the pterygopalatine ganglion and the maxillary nerve blockade. We present the result of 100 pterygopalatine canals evaluation using cone-beam computed tomography. The results are compared with those of similar studies.Компьютерная томография является обязательным методом предоперационного обследования ринологических пациентов и позволяет оценивать топографические характеристики анатомических структур. В исследовании разработан алгоритм оценки клинической анатомии крылонёбного канала пациентов для повышения эффективности и безопасности блокады крылонёбного узла и верхнечелюстного нерва. Приводится результат оценки характеристик 100 крылонёбных каналов по данным конусно-лучевой компьютерной томографии. Проведено сравнение полученных результатов с данными аналогичных исследований

    Search for the Cryptoexotic Member of the Baryon Antidecuplet 1/2+ in the Reactions pi- p --> pi- p and pi- p --> K L

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    The main goal of this proposal is the search for a narrow cryptoexotic nucleon resonance by scanning of the pi- p system invariant mass in the region (1610-1770) MeV with the detection of pi- p and K Lambda decays. The scan is supposed to be done by the variation of the incident pi- momentum and its measurement with the accuracy of up to +-0.1% (better than 1 MeV in terms of the invariant mass in the whole energy range) with a set of proportional chambers located in the first focus of the magnetooptical channel. High sensitivity of the method to the resonance under search is shown. The secondary particles scattered from a liquid hydrogen target are detected by sets of the wire drift chambers equipped with modern electronics. The time scale of the project is about 3 years. The budget estimate including manpower, the apparatus and operation cost, is about 40 million rubles. The beam time required is (4-6) two week runs on "high" (10 GeV/c) flattop of the ITEP proton synchrotron.Comment: 16 pages, 10 figures. v2: an acknowledge adde

    Fabrication and properties of L-arginine-doped PCL electrospun composite scaffolds

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    The article describes fabrication and properties of composite fibrous scaffolds obtained by electrospinning of the solution of poly({\epsilon}-caprolactone) and arginine in common solvent. The influence of arginine content on structure, mechanical, surface and biological properties of the scaffolds was investigated. It was found that with an increase of arginine concentration diameter of the scaffold fibers was reduced, which was accompanied by an increase of scaffold strength and Young modulus. It was demonstrated that porosity and water contact angle of the scaffold are independent from arginine content. The best cell adhesion and viability was shown on scaffolds with arginine concentration from 0.5 to 1 % wt
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