Электроснабжение вагоноремонтного завода с детальной проработкой механического цеха

Выпускная квалификационная работа содержит пояснительную записку, включающую 95с., 13 рис., 33 табл., 23 источника., приложение 4., Ключевые слова: мощность, ток, напряжение ,расчет разработки системы , трансформатор ,однолинейная схема, карта селективности, финансовый менеджмент, ресурсоэффективность, ресурсосбережение, социальная ответственность. Объектом исследования является механический цех, вагоноремонтного завода. Цель работы: разработка системы электроснабжения промышленного предприятия. В данной выпускной квалификационной работе произведен выбор метода расчета на основе исходных данных, поочередный расчет электрических нагрузок завода и рассматриваемого цеха, выбор оборудования и испытание при различных режимах работы. В результате исследования была спроектирована оригинальFinal qualifying work contains an expl message, including 95s., 13 fig., 33 tables., 23 sources., appendix 4., keywords: power, current, tension of,raschet development of the system, a transformer is a,odnolineynaya chart, map of selectivity, financial management, resursoeffektivnost', resursosberezhenie, social responsibility. A research object is a machine-shop, railway-carriage repair works. Purpose of work: development of the system of power supply of industrial ..

Gadolinium in pediatric cardiovascular magnetic resonance: what we know and how we practice

BACKGROUND: The association of gadolinium-based contrast agents (GBCAs) with nephrogenic systemic fibrosis (NSF) has led to a heightened awareness towards patients’ renal function. Whereas detailed guidelines exist for the use of GBCAs in adult patients, best practice is less well defined in children, especially in the very young. We aimed at identifying current practice with regards to the use of GBCAs in children who undergo Cardiovascular Magnetic Resonance. METHODS: We conducted a worldwide survey among cardiac imagers with pediatric expertise. The questionnaire contained 21 questions covering the imagers’ work environments, GBCAs used, monitoring of renal function, and a special emphasis was placed on the practice in neonates. RESULTS: The survey yielded 70 replies. The single most commonly used GBCA was gadopentetate dimeglumine 34/70 (49%). Among the respondents, the choice of GBCA was more importantly based on availability 26/70 (37%) and approval by a pharmaceutical licensing body that most closely reflects the indication 16/70 (23%) than image quality 7/70 (10%) and side effect profile 8/70 (11%). 55/70 (79%) of respondents performed scans in neonates <1 week of age and 52/55 (95%) of them used GBCA in neonates. 65/70 (93%) respondents at least assess some of their patients’ renal functions. Formula-based estimate of glomerular filtration rate is the most popular assessment method 35/65 (54%). In patients with a glomerular filtration rate < 30 ml/min/1.73 m(2) 62/70 (89%) of respondents do not administer gadolinium at all. The single most common side effect of gadolinium was noted to be nausea/emesis 34/57 (60%) followed by discomfort at injection site 17/57 (30%). CONCLUSIONS: Cardiac imagers are aware of the immature renal function and physiological differences of their pediatric patients that place them at risk for NSF. Epidemiological data is needed for pediatric cardiovascular licensure of gadolinium compounds and for the creation of practice guidelines which will replace current-day practice based on individual clinical judgment

Late Gadolinium Enhancement of the right ventricular myocardium: Is it really different from the left ?

It has been suggested that, in late gadolinium enhancement, the signal of right ventricular myocardium is nulled at a shorter inversion time than the left. While we initially made the same observation, we believe that the difference is not real, but results from artifacts