The Numerical Simulation Application for Fire-Tube Boiler Heating Surface Safety Evaluation

The numerical simulation is applied for fire-tube boiler heating surface safety estimation. Thermal processes in an inflatable fire-tube furnace during its emergency operation were simulated using the finite volume method with Euler approximation and the implicit pressure based algorithm. Study results reproduce failures connected with increasing of impasse aerodynamic resistance. The method of these failures prediction is suggested. Simulation has shown that entering the amount of coolant into combustion volume results in burner fan incapability to overcome the impasse resistance of the furnace. The simulation results are visually confirmed during the inspection of emergency boilers

Stress hormones: cortisol, adrenocorticotropic hormone and oxytocin in the context of social violations in children with autism spectrum disorders

Autism spectrum disorders (ASD) refer to heterogeneous disorders of neurodevelopment, the main symptom of which is social insufficiency. Aim: to conduct a one-stage assessment of the relationship between key hormones in the regulation of social and stress responses: adrenocorticotropic hormone (ACTH), cortisol, oxytocin, in children with ASD in the context of severe social insufficiency. Materials and methods. A total of 44 children (37 boys and 7 girls) aged 3 to 12 years with a diagnosis of ASD were examined, which were divided into groups: with preserved social contact / lack of it. The concentrations of hormones were evaluated in blood plasma by the method of ELISA. Results. ACTH and cortisol demonstrate interdependent relationships without the involvement of oxytocin in children with ASD, while maintaining their social contact. In children with ASD with symptoms of social insufficiency, there are no correlations between the studied neurohormones. The conclusion. The data obtained suggest that the processes of disorganization / destruction of neuroanatomical and physiological connections between the systems of oxytocin and the hypothalamic-pituitary-adrenal axis (HPA-axis) and (or) the hypothalamic-neurohypophysis system and the HPA-axis

ФОРМИРОВАНИЕ ГЕОТЕХНИЧЕСКИХ СВОЙСТВ ПРИКОНТУРНЫХ ГРУНТОВЫХ СЛОЁВ ПОДЗЕМНОГО ТУННЕЛЯ ЭЛЕКТРОХИМИЧЕСКИМ МЕТОДОМ

Строительство подземных сооружений и туннелей является приоритетным направлением развития для крупных городов, поверхность которых плотно застроена постройками и объектами городской инфраструктуры. При анализе процессов возведения тоннелей закрытым способом строительства можно отметить, что технологии строительства тоннелей имеют ряд недостатков (повышенные расходы на материалы, высокую энергоёмкость и трудоёмкость, низкое качество уплотнения отделки и т.д.), которые существенно снижают технико-экономические показатели и эксплуатационные свойства сооружений

Способы стимулирования персонала в организации ООО "Газпром трансгаз Томск"

Целью дипломной работы является выявление способов стимулирования в организации. Объект исследования: Стимулирование персонала в организации ООО "Газпром трансгаз Томск". Предмет исследования: Способы стимулированиям персонала в организации ООО "Газпром трансгаз Томск". Цель: Выявить сущность и содержание стимулирования в организации, дать характеристику способов стимулирования, применяемых в организации. Задачи: 1.Рассмотреть понятие стимулирования. 2.Рассмотреть характеристику и историю предприятия ООО "Газпром трансгаз Томск". 3.Проанализировать способы стимулирования ООО "Газпром трансгаз Томск".The purpose of the thesis is detection of methods of stimulation in the organization. Research object: Stimulation of a staff in the LLC Gazprom transgaz Tomsk organization. Object of research: Methods to stimulations of a staff in the LLC Gazprom transgaz Tomsk organization. Purpose: To reveal an entity and content of stimulation in the organization, to give the characteristic of the methods of stimulation applied in the organization. Tasks: 1. To consider a concept of stimulation. 2. To consider the characteristic and history of the LLC Gazprom transgaz Tomsk enterprise. 3. To analyze methods of stimulation of LLC Gazprom transgaz Tomsk

Пространственная дифференциация болот бассейна р. Чая

В работе рассматриваются закономерности пространственной структуры болот бассейна р. Чая, на примере ключевого участка. Выделено следующие типы местности: пойменный тип, три надпойменные террасы р.Чая, междуречная равнина, долины малых рек. Рассчитанная заболоченность участка составляет 18,31%. In the article consider spatial distribution powered by marshiness river basin Сhaya. There are allocated following district types: floodplain, three terraces river Chaya, interfluve, valley small rivers. The certain marshiness of a site is 18,31%

Análise quantitativa da remoção de esmalte dental durante a técnica de microabrasão

Objetivo: Quantificar, por meio de perfilometria, a profundidade de esmalte dental removido durante o emprego de uma técnica de microabrasão utilizando-se ácido clorídrico e abrasão manual com espátula plástica. Método: Trinta e seis espécimes obtidos de terceiros molares humanos foram polidos, para obtenção de superfícies planas, e divididos em 3 grupos (n = 12) de acordo com os diferentes tratamentos recebidos: tratamento placebo com água deionizada, como controle negativo (CG); microabrasão com ácido clorídrico a 6.6%, OpalustreTM (G1); e ácido clorídrico a 6%, Whiteness RMTM (G2). A microabrasão foi realizada, de forma padronizada, submetendo os espécimes a 4 ciclos de 10 segundos cada e abrasão manual utilizando-se uma espátula plástica com carga de 200 g. A perda da superfície de esmalte foi medida após cada um dos ciclos de tratamento por meio de perfilômetro de contato. Resultados: Após os primeiros 10 segundos de abrasão, já foi encontrada perda de esmalte em ambos os grupos tratados (G1 e G2). Nos grupos G1 e G2, a cada ciclo de 10 segundos, foi observado um aumento significativo na perda de esmalte (p ≤ 0.05). Após 4 abrasões de 10 segundos cada, as médias de perda de esmalte nos grupos tratados foram 46.04 μm (G1) e 54.65 μm (G2). Foi encontrada uma diferença significativa entre G1 e G2 com relação à perda de esmalte após 30 e 40 segundos de microabrasão. Relevância: Os resultados deste estudo fornecem referências para a realização do procedimento de microabrasão em esmalte dental com segurança, utilizando-se ácido clorídrico e abrasão manual com espátula plástica.Objective: To quantify, by means of profi lometry, the removal of dental enamel during the use of a microabrasion technique involving the use of hydrochloric acid and manual abrasion with a plastic spatula. Method: Thirty six specimens obtained from human third molars were polished to obtain fl at surfaces and divided into 3 groups (n = 12) according to the different treatments received: A placebo treatment with deionized water as a negative control (CG); microabrasion with 6.6% hydrochloric acid, OpalustreTM (G1); and microabrasion with 6% hydrochloric acid, Whiteness RMTM (G2). The microabrasion was performed in a standardized manner by submitting the specimens to 4 cycles of 10 seconds each and manual abrasion using a plastic spatula (200 g load). The loss of enamel surface was measured after each cycle of treatment by contact profi lometry. Results: Enamel loss was already observed after the fi rst 10 seconds of abrasion with hydrochloric acid in both treated groups (G1 and G2). After 4 abrasions of 10 seconds each, the average fi nal enamel losses in the treated groups were 46.04 μm (G1) and 54.65 μm (G2). In the G1 and G2 groups, a signifi cant increase in enamel wear was detected in each cycle in comparison to the control group (p ≤ 0.05). A signifi cant difference in enamel loss between G1 and G2 was found after 30 and 40 seconds of microabrasion. Relevance: The results of this study provide objective data for safely performing the microabrasion technique on dental enamel using hydrochloric acid and manual abrasion using a plastic spatula

Таможенные услуги: сущность, порядок предоставления и проблемы качества

В работе исследуется содержание системы предоставления таможенных услуг в России. Также в работе представлены результаты изучения качества предоставления таможенных услуг таможенными органами и коммерческим сектором и предлагаются пути решения данных проблем.The diploma work is aimed at studying the content of the system of providing customs services in Russia. The diploma work also studies the problem of the quality of services provided by the customs authorities and the commercial sector and suggests the ways of its solving