МОДЕЛИРОВАНИЕ НАЧАЛЬНОГО ЭТАПА СТАЦИОНАРНОГО ПЛАМЕННОГО ПОЖАРА В ЗАКРЫТОМ ПОМЕЩЕНИИ

A computer simulation of the initial stage of stationary flame fire in an indoor area has been made with the help of FDS software (version 5). It has been shown that stationary and non-stationary heat release stages are present in a stationary fire according to mass burning rate. Duration of these stages depend on fire source intensity and its level. Non-stationary stage is characterized heat liberation pulsations which are irregular in amplitude and duration. The pulsations are caused by uprising of flame burning in the smoke scope.С помощью программы FDS (version 5) проведено компьютерное моделирование начального этапа стационарного пламенного пожара в закрытом помещении. Показано, что в стационарном по массовой скорости горения пожаре присутствуют стационарный и нестационарный этапы по тепловыделению, длительности которых зависят от мощности и высоты расположения источника пожара. Нестационарный этап характеризуется нерегулярными по амплитуде и длительности пульсациями тепловыделения, обусловленными возникновением пламенного горения в объеме дым

ТАКТИКА АНТИСЕКРЕТОРНОЙ ТЕРАПИИ В ПЕРИОПЕРАЦИОННОМ ПЕРИОДЕ НА ФОНЕ МОНИТОРИРОВАНИЯ КИСЛОТНОСТИ ЖЕЛУДОЧНОГО СОКА У КАРДИОХИРУРГИЧЕСКИХ БОЛЬНЫХ

Purpose. The aim of this research is to study the intragastric pH changes in order to develop an algorithm of gastroduodenal complications prevention and treatment in patients undergone open heart surgery at our institution.Materials and methods. In a prospective randomized trial (180 patients) the method of predicting gastroduodenal complications was examined in coronary surgery patients based on the hypoxic test and intragastral pH monitoring.Results. The dynamics of intragastric pH during cardiac surgery and in the early postoperative period was analyzed; its correlation with clinical and laboratory data was studied.Conclusion. The algorithm for risk assessment, prevention and treatment of gastroduodenal complications was proposed. Цель. Изучение динамики интрагастрального рН на этапах кардиохирургической операции и в раннем послеоперационном периоде для обоснования алгоритма профилактики и лечения гастродуоденальных осложнений.Материалы и методы. В проспективном рандомизированном исследовании 180 больных, перенесших кардиохирургическую операцию в условиях искусственного кровообращения.Результаты. Проанализирована динамика интрагастрального рН на этапах кардиохирургической операции и в раннем послеоперационном периоде, изучена корреляция с клинико-лабораторными данными. Заключение. Предложен алгоритм оценки риска, профилактики и терапии гастродуоденальных осложнений.

SIMULATION OF INITIAL STAGE OF STATIONARY FLAME FIRE IN INDOOR AREAS

A computer simulation of the initial stage of stationary flame fire in an indoor area has been made with the help of FDS software (version 5). It has been shown that stationary and non-stationary heat release stages are present in a stationary fire according to mass burning rate. Duration of these stages depend on fire source intensity and its level. Non-stationary stage is characterized heat liberation pulsations which are irregular in amplitude and duration. The pulsations are caused by uprising of flame burning in the smoke scope

Assessing written work by determining competence to achieve the module-specific learning outcomes.

This chapter describes lasers and other sources of coherent light that operate in a wide wavelength range. First, the general principles for the generation of coherent continuous-wave and pulsed radiation are treated including the interaction of radiation with matter, the properties of optical resonators and their modes as well as such processes as Q-switching and mode-locking. The general introduction is followed by sections on numerous types of lasers, the emphasis being on todayʼs most important sources of coherent light, in particular on solid-state lasers and several types of gas lasers. An important part of the chapter is devoted to the generation of coherent radiation by nonlinear processes with optical parametric oscillators, difference- and sum-frequency generation, and high-order harmonics. Radiation in the extended ultraviolet (EUV) and x-ray ranges can be generated by free electron lasers (FEL) and advanced x-ray sources. Ultrahigh light intensities up to 1021 W/cm2 open the door to studies of relativistic laser–matter interaction and laser particle acceleration. The chapter closes with a section on laser stabilization