Agitation of the melt in mold hot tops

Donetsk Polytechnic Institute. Translated from Metallurg, No. 4, pp. 35–36, April, 1990.     

Two steps to enhance managed care quality

AIM: The study of physical performance of ischemic heart disease (IHD) patients in comfortable and uncomfortable (summer) weather conditions. MATERIALS AND METHODS: Systemic reserves were assessed by physical performance tests in comfortable weather (equivalent-effective temperature--EET 18-24 degrees C) and in heat discomfort (EET 25-30 degrees C), i.e. in summer when atmospheric oxygen is low (hyperthermic hypoxia). RESULTS: In uncomfortable weather, compared to comfortable one, general performance was significantly reduced evidencing uneffective function of the cardiovascular system. Comparison of the main ergometric parameters under the same load provides more accurate definition of the same trends in dynamics. CONCLUSION: General reserve in IHD patients is reduced under conditions of heart discomfort.     

炉尾减量燃烧控制 提高加热质量

对所在单位的推钢式加热炉的燃烧控制方式进行摸索和研究,通过对炉尾烧嘴的煤气减量燃烧控制,提高了加热质量,保证了钢坯的出炉温度。此方法可以在相关问题上得到推广应用。     

Metal loss and charge heating in the melt in an electric arc furnace

The heat exchange between a metallic melt and a slag with a charge is simulated with allowance for possible formation of a skull on the charge surface. It is shown that the charge melting rate in the melt is determined by the coefficient of heat transfer between the metal and the charge and the ratio of the mass of a charge fragment to its surface area interacting with the melt. A skull is found to form on the charge surface at a low coefficient of heat transfer between the metal and the charge. The main heat parameters, the control of which by an automatic control system ensures an increase in the charge melting rate in the melt and a decrease in the metal loss, are formulated.     

Striving to prevent falls in an acute care setting--action to enhance quality

Endothelial damage is thought to be a contributing factor in the pathogenesis of Thrombotic Thrombocytopenic Purpura/Hemolytic Uremic Syndromes (TTP/HUS). The present studies measured two markers of endothelial cell stimulation and/or activation [von Willebrand Factor (vWF:Ag) and thrombomodulin (TM)] in patients with TTP/HUS disorders and compared them to controls. The patient groups consisted of adults with TTP/HUS, with (n = 13) and without (n = 14) peak Cr levels >2.0 mg/dl. Additionally, 52 patients with Bone Marrow Transplant-associated Thrombotic Microangiopathy (BMT-TM) following allogeneic BMT were evaluated. Both vWF:Ag and TM were elevated in all patient groups compared to controls. TTP/HUS patients with peak Cr >2.0 mg/dl had higher TM levels (P < 0.001) than did those with peak Cr levels below 2 mg/dl. However, thrombomodulin/ creatinine (TM/Cr) ratios did not differ in these two groups nor did they differ from controls. BMT-TM pts had higher vWF:Ag levels and higher TM/Cr ratios than controls and TTP/ HUS, P < 0.001. The median TM/Cr ratio in BMT-TM was 91 (range = 34-229) compared to 38 (range = 29-50) in controls, P < 0.001 and 38 (range = 6 to 156) in TTP/HUS, P < 0.001. Additionally both TM (P < 0.001) and TM/Cr (P < 0.02) were higher in patients with Grades 3 and 4 BMT-TM compared to those with Grade 2 BMT-TM. These results suggest that endothelial cell activation occurs in TTP/HUS and BMT-TM. Since TM/Cr ratios were higher in BMT-TM compared to TTP/HUS, these findings suggest that the mechanism of elevated TM in BMT-TM cannot be explained solely by altered renal excretion. Taken together, these findings strongly indicate a role of endothelial cell damage in BMT-TM.     

Psychological interventions for cancer patients to enhance the quality of life.

Although the thrust of the nation's cancer objectives for the year 2000 is prevention and screening, each year approximately 1 million Americans are diagnosed and must cope with the disease and treatments. They do so with the aid of family, friends, and the health care system, but accumulating data suggest that psychological interventions may be important for reducing emotional distress, enhancing coping, and improving "adjustment." Experimental and quasi-experimental studies of psychological interventions are reviewed, and a discussion of treatment components and mechanism is offered. A final section discusses future research directions and challenges to scientific advance. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

创建国家环保模范城市提升城市品质

2010年6月,中共重庆市委三届七次全委会出台了<关于做好当前民生工作的决定>,提出本届市委任期内,用两年半的时间,在解决全市群众最关心的10大民生问题上取得重大突破.<决定>把创建国家环境保护模范城市(简称创模)作为10大民生问题的重要内容,体现了市委、市政府对环保工作的高度重视.     

优化保护渣提高超低碳IF钢表面质量

 通过优化调整保护渣成分,保护渣熔点由1 222降至1 188 ℃,黏度由0.26提高到0.32 Pa·s,并进行工业试验,利用Aspex对铸坯不同部位大于2 μm的夹杂进行检测,发现铸坯边部和1/4宽、1/2宽、1/2厚度位置夹杂物均有所降低,同时热轧板卷表面临时封锁率由4.51%降低至2.55%。对采用改进保护渣后铸坯中不同部位夹杂物降低的原因进行分析,研究了保护渣吸附不同质量分数Al2O3夹杂后,保护渣熔化温度、黏度的影响规律,发现当添加Al2O3为12%时,保护渣A熔化温度最高至1 259 ℃;保护渣B熔化温度为1 203 ℃,保护渣A与B的黏度分别为0.79和0.59 Pa·s,黏度过大不利于吸附Al2O3夹杂。     

全面实施素质教育不断提高教学质量

为了适应建立社会主义市场经济体制对人才素质的新要求,<中国教育改革和发展纲要>明确指出:中小学要由"应试教育"转向全面提高国民素质的轨道.当前,变"应试教育"为素质教育,是我国基础教育的紧迫任务,是21世纪我国基础教育改革和发展的主旋律.因此,全面实施素质教育就成为当前学校教育工作的中心任务.本文就如何全面实施素质教育,不断提高教学质量谈点看法.     

Influence of melt oxidation on the quality of rail steel

The production of vacuum-treated rail steel with discharge of metal containing at least 0.10% C from the electrofurnace and the addition of carbon-bearing material in the ladle at discharge is described. This technology significantly reduces the oxygen content in the steel and the presence of rows of brittle-fracturing oxides and hence permits the production of higher-quality steel.     

加强科学管理提高教学质量

为了加快我国教育的发展,创造有利于全面推动素质教育的环境,更好地适应21世纪我国社会主义现代化建设对人才的需要,中央作出了扩大高等学校招生规模的决策,这一决策是具有非常重大意义的.多年来,我国高等教育一直是精英型教育,教育的真正目的没有能够得到充分实现.高校的扩招,拉动了内需,促进了社会主义经济的发展,满足了广大人民群众接受教育的迫切愿望,促进了民族素质的提高,同时,也促进了高等学校的建设和发展,是一件利国、利民的大事.但高校扩招后,也面临着许多困难和问题.高校如何来克服困难,解决问题,对保证扩招后的教学质量是非常关键的.……     

Influence of mold flux on the thermal processes in the mold

Analysis of the literature on the thermophysical properties of mold flux shows that the measurement results for the thermophysical properties of the slag vary significantly, depending on the method employed. On that basis, a model is proposed for calculating the heat flux in the system consisting of the ingot, the slag film, and the mold. Literature data regarding the properties of the slag and industrial data regarding the mold’s wall temperature are employed here. The proposed model permits investigation of the heat flux as a function of the thickness and physicochemical properties of the mold flux.     

开展愉快教学提高教学质量

“兴趣是最好的老师“,这可谓是教学中的至理名言.当学生对学习产生了兴趣,即有了学习的动力,就能获得成功.学生一旦对学习产生了浓厚的兴趣,就能自觉学习,专心听讲,积极思考,认真完成作业,就能把学习看成是一种愉快的享受,把获得好成绩看成是一种幸福.愉快教学就是通过学生所喜欢的一系列教学形式,来调动学生的学习兴趣,将非智力因素转换成智力因素,从而更有效地发展学生的思维能力、想像能力,提高学生的表达能力.……