207 research outputs found

    BAT According to Climatic Neutrality of Production of Steel Products

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    The purpose of this article is to estimate the best available technologies for values of the following technological numbers: fuel, ecological, depreciation, greenhouse and their sums. All these numbers have power dimension: t of conditional fuel/unit of production that allows to put them. The fuel technological number characterizes power consumption of production. The technological ecological number transfers a payment of the enterprise for environmental pollution to power units. The technological depreciation number transfers depreciation charges from rubles to power units. The technological greenhouse number translates a payment of the enterprise for emissions of greenhouse gases in power units. Technological numbers have through character – from extraction of raw materials before receiving finished goods. The best available technologies are characterized by the smallest sum of all technological numbers. Keywords: through power-ecological analysis, power ecological capacity of production of steel products, technological fuel ecological greenhouse number, best available technologies, climatic neutralit

    Graph model for carbon dioxide emissions from metallurgical plants

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    Mathematical models are presented for estimating carbon dioxide emissions from metallurgical processes. The article also presents a new mathematical model in graph form to calculate transit and net emissions of carbon dioxide based on the estimates obtained for the individual processes. The graph model is used to compare the blast-furnace-converter process with the blast-furnace-EAF process. © 2013 Springer Science+Business Media New York

    Corrosion Resistance of Al–CNT Metal Matrix Composites

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    The design of aluminium–graphite metal matrix composites (MMCs) with advanced mechanical properties and high corrosion resistance is in demand for aerospace, transportation, and industrial applications. Breakthroughs in this field are limited due to the tendency of aluminium– graphite MMCs to corrode. In the present research, aluminium‐based MMCs were produced by a relatively novel combined two‐staged method. Multiwall carbon nanotubes (MWCNTs) were added into molten Al1070 and processed by high‐pressure die casting followed by cyclic extrusion. For the composites produced by this method, it was previously demonstrated that mechanical properties are improved in comparison with pure aluminium alloys. In the current study, the manufactured Al–MWCNT composites were investigated by electrochemical tests (such as open circuit potential), potentiodynamic tests, linear polarization tests, and electrochemical impedance spectra to understand the corrosion resistance of the obtained composite material. The experimental testing of the corrosion resistance of Al–MWCNT MMCs showed that due to the advantages of the fabrication method, the addition of CNTs to aluminium does not cause a radical decrease of corrosion resistance. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.Acknowledgments: This article is based upon work from COST Action CA15102 “CRM‐EX‐ TREME—Solutions for Critical Raw Materials under Extreme Conditions” and COST Innovators’ Grant IG15102 “ITHACA—Innovative and sustainable TecHnologies for reducing critical raw mA‐ terials dependence for Cleaner transportation Applications” supported by COST (European Coop‐ eration in Science and Technology) www.cost.eu

    Calculation of power consumption and issue of CO2 at various processes by the production of steel

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    Проведены сравнительные расчеты эмиссии диоксида углерода – парникового газа – при различных сочетаниях коксовых (доменная печь + конвертер, доменная печь + электродуговая печь или ЭДП) и бескоксовых (HyL-3 + ЭДП, MIDREX + ЭДП, ROMELT + ЭДП, COREX + ЭДП, ЭДП на ломе) процессов производства стали. Для сравнительной оценки технологических процессов приведено ранжирование по значению сквозной интегральной эмиссии парникового газа CO2. При производстве стали выявлены преимущества по значению эмиссии CO2 для процессов HyL-3 + ЭДП, Midrex + ЭДП.Comparative calculations of carbon dioxide emission - greenhouse gas at various combinations coke oven (a blast furnace – the converter, a blast furnace - the electric arc furnace or EAF) and the coke-free (HyL-3-EAF, MIDREX-EAF, ROMELT-EAF, COREX-EAF, EAF on scrap) processes for the production of steel are carried out. For comparative assessment of technological processes in the framework of the power-ecological analysis it is considered parameter of emission of CO2 greenhouse gas. Steel production advantages CO2 emissions when using processes of HyL-3 + EAF, Midrex + EAF are revealed

    About interdisciplinary connections teaching technical disciplines by selecting the tracks of learning

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    В статье рассматриваются вопросы преподавания студентам младших курсов следующих дисциплин: сопротивление материалов, физика, гидравлика. Обращение к рассматриваемой теме вызвано присоединением России к Болонской декларации по высшему образованию. С этого начались реформы в отечественной системе образовании. Реформирование происходит как в содержательном, так и в организационном направлениях. В результате введено трехуровневое образование: бакалавр, магистр, аспирант. Были разработаны и утверждены Федеральные государственные стандарты образования нового поколения. Нововведения анализируются на примере преподавания дисциплинстудентам Строительного и Механико-машиностроительного институтов Уральского федерального университета имени первого Президента России Б.Н.Ельцина (УрФУ).This article deals with the teaching of the most important disciplines for undergraduates: strength of materials, physics, hydraulics. Appeal to the topic due to Russia's accession to the Bologna Declaration on Higher Education. This started a reform of our education system. Reforming occurs both in substance and in organizational directions. As a result, introduced a three-level education: Bachelor, Master and PhD student. Federal State Educational Standards of a new generation were developed and approved. Innovations are analyzed as an example of teaching disciplines for students of Institute of Civil Engineering and of Institute of Mechanics and Machine Building of the Ural Federal University named after the first President of Russia Boris Yeltsin (UrFU)

    Влияние легочной гипертензии на толерантность к физической нагрузке при выраженной хронической обструктивной болезни легких

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    Summary. The purpose of this study was to investigate effects of pulmonary hypertension on exercise capacity in patients with severe chronic obstructive pulmonary disease (COPD). Lung function, mean pulmonary artery pressure (mPAP) and physical capacity were monitored in 30 patients with advanced COPD and pulmonary hypertension. mPAP was calculated from the acceleration time of pulmonary flow in Doppler echocardiographic examination. Exercise capacity was assessed by a distance walked in 6 min (6MWD) and by an incremental cardiopulmonary exercise test (CPET). We used "Ergopneumotest" equipment (Erich Jaeger, Germany) for CPET. There was no statistically significant difference in any of CPET and 6MWD variables between the patients with mPAP < 25 mm Hg and those with mPAP > 25 mm Hg. There was no correlation between PAP and any of the exercise measurements. These results suggest that the exercise capacity in patients with advanced COPD and mild to moderate pulmonary hypertension is essentially limited by exhaustion of the ventilatory reserve.Резюме. Проведен мониторинг функции внешнего дыхания (ФВД), среднего давления в легочной артерии и физической работоспособности у 30 пациентов с выраженной хронической обструктивной болезнью легких (ХОБЛ) и легочной гипертензией. Целью исследования было определение влияния легочной гипертензии на физическую выносливость у пациентов с ХОБЛ. Среднее давление в легочной артерии было рассчитано с учетом времени ускорения легочного потока в выносящем тракте правого желудочка при допплер-эхокардиографии. Физическая выносливость оценивалась во время 6-минутного шагового теста (6-MШТ) и кардиореспираторного теста (КРT), для которого было использовано оборудование Ergopneumotest (Erich Jaeger, Германия). Разница между параметрами КРT и 6-MШТ у пациентов с легочной гипертензией и без нее не была статистически значимой. Корреляции между средним давлением в легочной артерии и параметрами нагрузочных тестов не отмечалось. Полученные результаты предполагают, что физическая толерантность у пациентов с выраженной ХОБЛ и умеренной легочной гипертензией существенным образом зависит от дыхательного резерва

    Modern trends of the scientific society of young scientists and students of the department of pediatric dentistry and orthodontics

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    This article discusses the results of the student scientific circle of the Department of pediatric dentistry and orthodontics of the Ural state medical University. The following aspects are covered: the format of meetings, joint meetings with other departments and other forms of interdepartmental cooperation, organization and holding of conferences, especially the circle and prospects for developmentВ данной статье рассматриваются результаты работы студенческого научного кружка кафедры стоматологии детского возраста и ортодонтии Уральского государственного медицинского университета. Освещены следующие аспекты: формат проведения заседаний, проведение совместных заседаний с другими кафедрами и прочие формы межкафедрального сотрудничества, организация и проведение конференций, особенности кружка и перспективы развити

    Assessment of adherence to treatment in patients

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    The article presents an analysis of adherence to treatment of patients with essential hypertension at the Central City Hospital No. 3, Yekaterinburg. Our questionnaire survey explored 27 patients of both sexes at the age of 52 (47; 58) years with stages 1-2 of hypertension. The results of the questionnaire showed low adherence level to antihypertensive therapy. Male patients appeared to be less adherent to treatment than femaleВ статье приведен анализ приверженности к лечению пациентов с гипертонической болезнью, обратившихся за амбулаторной помощью в ЦГБ №3 г. Екатеринбурга. В исследование вошли 27 пациентов обоих полов в возрасте 52 (47; 58) года с 1-2 стадией гипертонической болезни. По результатам анкетирования среди участников исследования отмечался низкий уровень комплаентности к антигипертензивной терапии. При анализе по половому признаку мужчины демонстрировали более низкие значения показателя приверженности в сравнении с лицами женского пол
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