7 research outputs found

    Полевые исследования электронных тахеометров

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    This article presents the results of field research of two total stations (the park of geodetic instruments of the experimentally-technological laboratory of remote sensing and land resources moni-toring of the Agrarian Technological Institute of the RUDN University. This article was written based on the research practices which the authors were in the Scientific and Educational Center of the Agrari-an Technological Institute of the RUDN University. Electronic total stations, along with the receivers of the Global Navigation Satellite Systems (GNSS) currently is one of the most popular tools for the produc-tion of topographic and geodetic works. One of the important requirements of users for these surveying instruments — the accuracy of the measurement, which determines the accuracy of determining the co-ordinates of the turning points and the land area. The studies were conducted at a specialized reference geodetic network, authorized to carry out such tests, and is a benchmark tool for metrological certification of surveying instruments. For testing were chosen total stations that are most in demand in the production of topographic and cadastral surveys. The studies included a comparative analysis of the length and height of the reference sections of a linear basis, the measured electronic total stations; comparing passport data accuracy performance total station with the actual values obtained from measurements on the reference basis; Comparative analysis of the results of measurements of the lengths of sections and elevations of the reference line basis, with the reference values. The results of field studies have shown that the actual accu-racy of the measurements performed by the subjects geodetic instruments generally corresponds to the values indicated in their passport characteristics. This led to the conclusion of the suitability of total stations for precise positioning required for receipt of geospatial data ensuring land surveying and cadastral works. Analysis of the results of geodetic measurements of the reference base segments showed the discrepancy between the increase of the increase of the measured distance. Fixed deterioration of the measurement accuracy in areas where there may be potentially interfere with the precision-guided sighting axis on the reflector.В данной статье представлены результаты проведенных полевых исследований двух электронных тахеометров, входящих в парк геодезических приборов Экспериментально-технологической лаборатории дистанционного зондирования и мониторинга земельных ресурсов Аграрно-технологического института Российского университета дружбы народов. Статья написана по материалам научно-исследовательской практики, которую ее авторы проходили в Научно-образовательном центре Аграрно-технологического института РУДН. Электронные тахеометры наряду с приемниками Глобальных навигационных спутниковых систем (ГНСС) в настоящее время являются одними из самых востребованных инструментов для производства топографо-геодезических работ. Одним из важных требований, предъявляемых пользователями к этим геодезическим инструментам, - точность их измерений, от которой зависит точность определения координат поворотных точек и площадей земельных участков. Исследования проводились на специализированной эталонной геодезической сети, допущенной к проведению подобных испытаний и являющейся эталонным средством для метрологической аттестации геодезических приборов. Для испытаний были выбраны тахеометры, являющиеся наиболее востребованными при производстве топографических и кадастровых съемок. Исследования включали сравнительный анализ длин и превышений отрезков эталонного линейного базиса, измеренного электронными тахеометрами; сравнение паспортных данных точностных характеристик электронных тахеометров с фактическими значениями, полученными по результатам измерений на эталонном базисе; сравнительный анализ результатов измерений длин и превышений отрезков эталонного линейного базиса, с эталонными значениями. Результаты полевых исследований показали, что фактическая точность измерений, выполненных испытуемыми геодезическими приборами, в целом соответствует значениям, указанным в их паспортных характеристиках. Это позволило сделать вывод о пригодности исследуемых электронных тахеометров для точного определения координат, необходимых для обеспечения геопросранственными данными землеустроительных и кадастровых работ. Анализ результатов геодезических измерений отрезков эталонного базиса показал зависимость увеличения невязки от увеличения измеряемого расстояния. Зафиксировано ухудшение точности измерений в местах, где потенциально могут быть помехи для точного наведения визирной оси на отражатель

    Medical consequences of Chernobyl accident

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    Aim: to study the long-term effects of acute radiation syndrome (ARS), developed at the victims of the Chernobyl accident. Material and Methods. 237 people were exposed during the accident, 134 of them were diagnosed with ARS. Dynamic observation implies a thorough annual examination in a hospital. Results. In the first 1.5-2 years after the ARS mean group indices of peripheral blood have returned to normal. However, many patients had transient expressed moderate cytopenias. Granulocytopenia, thrombocytopenia, lymphopenia and erythropenia were the most frequently observed things during the first 5 years after the accident. After 5 years their occurences lowered. In 11 patients the radiation cataract was detected. A threshold dose for its development is a dose of 3.2 Gy Long-term effects of local radiation lesions (LRL) range from mild skin figure smoothing to a distinct fibrous scarring, contractures, persistently recurrent late radiation ulcers. During all years of observation we found 8 solid tumors, including 2 thyroid cancers. 5 hematologic diseases were found. During 29 years 26 ARS survivors died of various causes. Conclusion. The health of ones with long-term ARS effects is determined by the evolution of the LRL effects on skin, radiation cataracts, hema-tological diseases and the accession of of various somatic diseases, not caused by radiation

    Expression of mature micro-RNA involved in the functioning of p53-dependent system of maintaining the genome stability of the individuals exposed to radiation at clinically relevant doses

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    Purpose: to explore the content of mature micro-RNA involved in the functioning of p53-dependent system of maintaining the genome stability in the blood of patients in distant time after irradiation at clinically relevant doses and to compare these micro-RNA with the development of malignant tumors in the period of late consequences of radiation injury. Materials and methods. We used the blood samples of patients with acute radiation syndrome (ARS), acute radiation syndrome with the development of local radiation injury (ARS+LRI) and local radiation injury (LRI) obtained through 1-51 year after radiation injury. The mature mir34a, mir21, mir145, mir16, mir125b, Iet7a which contained in the common fractions of RNA were reverse transcribed by using specific "stem-loop" — primers. The relative amount of micro-RNA in blood of patients by real-time PCR. Statistical analysis of the results was carried out using the non-parametric Mann —Whitney test. Data are presented as median and quartiles, normalized to median of control group accepted for 1. Results. We found a significant reduction of content of mir34a, mir21 in the blood of patients with a diagnosis ARS and the increase of content of mir145 in patients with LRI. Analysis of the individual values of micro-RNA expression in the blood of patients whose cancer was detected, except for patients with a bazalioma, showed consistency of changes with risk of carcinogenesis. Conclusion. For the first time was investigated the functional activity of p53-dependent system of maintaining the genome stability by measuring of micro-RNA in the blood of patients after many years post radiation injury. We found a significant reduction of content of mir34a, mir21 in blood of patients with ARS, and increased mir145 in patients with LRI. Our results suggest that further research with groups of patients, and analysis the dynamics of micro-RNA content would allow for use the micro-RNA as indicators of risk of late consequences after ARS and LRI.</p

    Blood status in the long-term radiation syndrome

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    Aims: to reveal regularities of change of peripheral blood indicators in the long-term acute radiation syndrome (ARS) depending on its initial severity and existence of various somatic diseases. Material and methods. Clinical he-matologic materials from 114 patients in the long-term ARS (from 1,5 to more than 20 years after radiation accident), developed as a result of gamma beta exposure are presented. Results. In the period of the late radiation effect average values of peripheral blood are in physiological norm limits. However at some patients there are temporary superficial cytopenic conditions (thrombocytopenia — 22,7%, a leukopenia — 12,2%, a neutropenia — 13,1%, a lymphocytope-nia — 10,5%). Conclusion. As a result of a dynamic research it is revealed that in the remote terms of ARS (from 1,5 to more than 20 years after radiation) average group levels of erythrocytes, leukocytes, neutrophils and lymphocytes in blood are in limits of physiological norm. However in the individual analysis of a functional state of blood at a part of patients are noted not stable cytopenic states

    INDICATORS OF QUALITY OF CANNED MILK: RUSSIAN AND INTERNATIONAL PRIORITIES

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    The main indicators of the quality and safety of dairy canned food in the range of low, intermediate and high humidity related to their distribution in Russia and abroad are considered. A comparative analysis of the quality parameters of traditional canned milk produced by the interstate standards in force in Russia, including obligatory conditions of compliance with technological requirements and sanitary and hygienic norms for production, when compared to similar products manufactured according to international standards, demonstrates competitive indicators of quality and safety. The basic technological approaches are investigated and a number of additional evaluation criteria for the utilization of various technologies and assessments of the quality of finished products are considered. Data on alternative raw ingredients, food additives and technological aspects that contribute to improving the quality of products, including storage stability, are reviewed. Separately presented are the integral criteria which, excludes the presence of falsified products. The principles of creating technologies for canned dairy products of functional purpose, including gero-dietetics, are described. Thus, based on a modern regulatory and technical base and using existing production capacities for the production of high-quality dairy canned food, the only necessary element for solving the problem of complete import substitution of canned dairy products in Russia is to increase the volume of raw material production
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