515 research outputs found

    Anomalous population of 10^{10}He states in reactions with 11^{11}Li

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    Structure with the lowest energy observed in the 10^{10}He spectrum populated in the proton knockout reaction with 11^{11}Li beam has a peak at 1.21.51.2-1.5 MeV. This peak is usually interpreted as a resonant 0+0^+ ground state of 10^{10}He. Our theoretical calculations indicate that this peak is likely to be a pileup of 11^-, 0+0^+, and 2+2^+ excitations with very similar shapes. %We predict a very specific nature of the 11^- excitation in 10^{10}He. Moreover, the ``soft'' 11^- excitation appears to be the lowest one in energy. Such an anomalous continuum response is traced to the halo structure of 11^{11}Li providing extreme low energy shift to all the expected continuum excitations. Competitions of the initial state structure (ISS) and the final state interaction (FSI) effects on the spectrum and three-body correlations in 10^{10}He are discussed. Analogous effect of the extreme low-energy shift could also be expected in other cases of 2n2n emitters populated in reactions with halo nuclei. Simplified example of the 10^{10}He spectrum in α\alpha knockout from 14^{14}Be, is given. We also discuss limits on the properties of 9^{9}He stemming from the observed 10^{10}He spectrum.Comment: 10 pages, 13 figure

    Updated analysis of NN elastic scattering to 3 GeV

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    A partial-wave analysis of NN elastic scattering data has been updated to include a number of recent measurements. Experiments carried out at the Cooler Synchrotron (COSY) by the EDDA Collaboration have had a significant impact above 1 GeV. Results are discussed in terms of the partial-wave and direct-reconstruction amplitudes.Comment: 16 pages, 14 figures, 2 tables; Fig 10 error corrected; Accepted for publication in Physical Review

    The Development of the Information System of Educational and Industrial Practices

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    Ефективність впровадження інформаційно-комунікаційних технологій у діяльність організацій різних форм власності головним чином залежить від інформаційної культури співробітників та керівництва, апаратного та програмного забезпечення, а також його обґрунтованого використання. Одним з видів програмного забезпечення, що дозволяє задовольнити інформаційні потреби користувачів, є інформаційні системи. Їх використання, разом із базами даних, які входять до складу інформаційних систем, сприятиме формуванню інформаційного середовища для здійснення ефективного управління комерційною організацією чи державною установою. Навчальна діяльність та безперервна виробнича практика закладають основи професійної майстерності майбутнього фахівця та дозволяють підвищити його конкурентоспроможність на ринку праці. Метою статті є повідомлення про розробку та опис функціональних можливостей інформаційної системи з навчально-виробничих практик, яка надає можливість підвищити інформаційну складову процесу проходження різних видів навчально-виробничих практик. У процесі розробки інформаційної системи використовувалася мова програмування PHP, фреймворк Yii Framework, бібліотека JQuery, технологія Ajax, програмне забезпечення MySQL. Розроблена інформаційна система здатна працювати у трьох режимах. Адміністратор може змінювати інформацію про практики (додавати нову, видаляти, змінювати внесені дані). Викладач може побачити перелік практик, студентів, які закріплені за ним та цією практикою, звіти студентів. Студент може побачити перелік практик, які він проходив або проходить. Інформація, яка вноситься до бази даних інформаційної системи, може бути використана для подальшого аналізу керівниками практики, завідувачем кафедри та співробітниками деканату.The effectiveness of the implementation of information and communication technologies in the activities of organizations of different ownership forms mainly depends on the information culture of staff and management, hardware and software, as well as its reasonable use. One of the software to meet the information needs of the users are of the system. Their use, together with databases that are part of information systems, to promote the formation of information environment for effective control of a commercial organization or government Agency. Training activities and continuous production practice of laying the foundations of professional skills of future specialist and enhance its competitiveness in the labor market. The purpose of this article is to report on the development and description of the functionality of the information system for educational and industrial practices, which makes it possible to increase the information content of the process through the various types of training and production practices. In the process of development of an information system used PHP programming language, framework, Yii Framework, JQuery, Ajax, MySQL software. The developed information system is able to operate in three modes. The administrator can change information about the practice (add new, delete, modify the data entered). The teacher can see the list of practices that students who are assigned to him and this practice, the records of the students. The student can see the list of practices which he passed, or passing. The information that is recorded in the database of the information system can be used for further analysis by the departments the head of Department and Dean's office

    Phytoplankton of the delta of the Mekong River during the dry season

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    Human activity has disturbed the functioning of river ecosystems all around the globe. The current global climatic fluctuations and local anthropogenic impact lead to rearrangement in the structure and functioning of aquatic communities. One of the most important components of aquatic ecosystems is phytoplankton as the main primary producer of the organic matter, the basis for trophic relations and indicator of changes in the environment. This article presents the first results of a study concerning the peculiarities of quantitative distribution of biomass and species composition of phytoplankton in the delta of the Mekong River at the beginning of the dry season (December of 2018). Diatoms dominated according to biomass practically in all the stations of selection of samples. The total biomass of phytoplankton on average accounted for 0.049 ± 0.007 mg/L at the abundance of 40 ± 7 103 ind./L. In practically all the studied plots, according to biomass, the dominating diatoms were first of all Aulacoseira granulata, A. islandica, Cyclotella meneghiniana, Cyclotella spp., and Oxyneis binalis. Among Chlorophyta, most often we found Chlorella sp. and Scenedesmus quadricauda, but their biomass was insignificant. We determined statistically significant correlation relationships between biomass of phytoplankton and hydrological parameters. Based on the Spearman’s rank correlation coefficient, we determined negative relations between the total biomass of phytoplankton with salinity and pH. Positive correlation was seen between the biomass of diatoms and turbidity, and also between the temperature and the biomass of chlorophytes and Dinophyta. The biomass of golden algae (Chrysophyceae) and Dinophyta positively correlated with the mineralization. Quantitative regression analysis confirmed the close relationship between the total biomass of phytoplankton, hydrophysical and hydrochemical parameters. Besides the importance of scientific data on biological diversity and ecology of plankton algae, the results we obtained are necessary for organizing biological monitoring in the delta of the Mekong River in the future

    Hadronic Regge Trajectories: Problems and Approaches

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    We scrutinized hadronic Regge trajectories in a framework of two different models --- string and potential. Our results are compared with broad spectrum of existing theoretical quark models and all experimental data from PDG98. It was recognized that Regge trajectories for mesons and baryons are not straight and parallel lines in general in the current resonance region both experimentally and theoretically, but very often have appreciable curvature, which is flavor-dependent. For a set of baryon Regge trajectories this fact is well described in the considered potential model. The standard string models predict linear trajectories at high angular momenta J with some form of nonlinearity at low J.Comment: 15 pages, 9 figures, LaTe

    Модель механізму антикризового управління в адміністративно-територіальному утворенні

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    The model of the crisis-mechanism for administrative-territory unit is descript including aim-setting, projects of the risk-oriented strategy formation, the structure institutionalization of the crisis-assignment, crisis-management during strategy realization, diagnostic and identification of the crisis-threats. The approach to management for the system of the strategy realization based on the crisis-group creation, which exist on dual virtual-real status. The approach delivers such differs: accented proactive management; integration of the strategic and crisis functions without the special institution creation; the matrix structure integrates the functional and aimed activity; adaptively opportunities; stimulate of the project management implementation; opportunities to create the inter-organizational crisis-cell under crisis-threat..Описано модель механізму антикризового управління в адміністративно-територіальному утворенні, яка включає процеси цілепокладання, формування проектів ризик-орієнтованої стратегії, структурну інституціоналізацію антикризової відповідальності, управління ризиками на етапах реалізації стратегії, діагностику та ідентифікацію кризових небезпек. Підхід до побудови системи управління реалізацією стратегії передбачає створення кризових груп, які можуть існувати у подвійному віртуально-реальному режимі, і має такі принципові ознаки: виражений проактивний характер; інтеграція стратегічних та антикризових функцій без створення спеціальної антикризової структури; матрична структура вправління поєднує функціональну і цільову діяльність; гнучкість; сприяння упровадженню проектного підходу; можливість в умовах кризової ситуації розгорнути міжорганізаційну мережу кризового управління

    Model of the mechanism of crisis management in the administrative-territorial entities

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    The model of the crisis-mechanism for administrative-territory unit is descript including aim-setting, projects of the risk-oriented strategy formation, the structure institutionalization of the crisis-assignment, crisis-management during strategy realization, diagnostic and identification of the crisis-threats. The approach to management for the system of the strategy realization based on the crisis-group creation, which exist on dual virtual-real status. The approach delivers such differs: accented proactive management; integration of the strategic and crisis functions without the special institution creation; the matrix structure integrates the functional and aimed activity; adaptively opportunities; stimulate of the project management implementation; opportunities to create the inter-organizational crisis-cell under crisis-threat

    Minigap, Parity Effect and Persistent Currents in SNS Nanorings

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    We have evaluated a proximity-induced minigap in the density of states (DOS) of SNS junctions and SNS nanorings at an arbitrary concentration of non-magnetic impurities. We have demonstrated that an isotropic energy minigap in the electron spectrum opens up already at arbitrarily weak disorder, while angle resolved DOS at higher energies can remain strongly anisotropic. The minigap value ϵg\epsilon_g can be tuned by passing a supercurrent through an SNS junction or by applying a magnetic flux Φ\Phi to an SNS ring. A non-monotonous dependence of ϵg\epsilon_g on Φ\Phi has been found at weak disorder. We have also studied persistent currents in isolated SNS nanorings. For odd number of electrons in the ring we have found a non-trivial current-phase (current-flux) relation which -- at relatively high disorder -- may lead to a π\pi-junction state and spontaneous currents in the ground state of the system.Comment: 7 pages, 8 figure

    The relationship of time perspective and subjective perceptions of students as the empirical base for individualization of the educational path

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    The significance of the investigated problem is stipulated by the need in practicing individualization of vocational educational process in the continuing education and lack of scientific and methodological support of its accompaniment. The purpose of the article is to substantiate the subjective perceptions and temporal perspective as the empirical bases of individualization of vocational and educational process. The leading method of research of this problem is a questionnaire that allows to identify the level of demonstration time perspectives (adapted technique ZTPI) and differentiate subjective judgments about the system of vocational education, professional self-determination process (questionnaire). The results of empirical study of time perspective, the subjective perception of vocational education and retrospective-prospective (forward-looking) aspects of professional self-determination, as well as their relationship with students are presented and discussed in the article. The results can be taken into account in the scientific and methodological support of individualization of vocational and educational process and in applied methods of formation of individual educational paths in vocational education. © 2016 Zavodchikov et al
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