• 한국주조공학회지
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• 제20권2호
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• pp.80-88
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• 2000

Continuous casting equipment was designed to cast the metallic uranium rods, and a thermal analysis was carried out to calculate the temperature and solidification profiles. Fluid flow and heat transfer analysis model including the effects of phase change was used to simulate the continuous casting process by finite volume method. In the design of continuous casting equipment, the casting speed, pouring temperature and cooling conditions should be considered as significant factors. In this study, the effects of casting speed, pouring temperature, and air gap between the uranium and mold were investigate. The results represented that the temperature and solidification profiles of continuous casting equipment varied with the casting speed, pouring temperature, and air gap.

• Journal of Gastric Cancer
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• 제8권4호
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• pp.256-261
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• 2008

목적: 위암 수술 후 이환율 및 사망률과 관련된 인자로 복강 내 체액 저류가 보고되고 있다. 저자들은 위암 수술후 복강 내 체액 저류가 발생한 환자군의 임상적 특징과 이에 관한 치료 방법으로 경피적 배액술을 시행한 군의 임상적 특징에 대하여 분석하였다. 대상 및 방법: 2005년 4월부터 2006년 7월까지 서울대학병원 외과에서 위암으로 수술 받은 1,277명 환자 중 117명에서 체액 저류가 확인되었다. 체액 저류의 치료 방법에 따라 임상 병리학적인 인자들의 차이를 분석하였다. 결과: 복강 내 체액 저류가 확인된 117명의 병기는 1기 42명(36.8%), 2기 23명(20.2%), 3기 16명(14%), 4기 33명(28.9%)이었다. 수술 방법으로 위아전절제술은 38명(32.5%), 위전절제술은 27명(23.1%), 위확대전절제술은 41명(35%)이었다. 치료방법으로써 경피적 배액술 시행 군과 보존적 치료를 한 군 간에 나이, 성별, 동반 질환 유무, 림프절 청곽술 범위, 병기, 체질량지수 등에서 차이를 보이지 않았다(P>0.05). 그러나 복부 전산화 단층 촬영에서 체액 저류 크기가 4cm 이상인 경우와 감염증이 있는 경우에 치료 방법으로써 경피적 배액술을 더 많이 시행하였다(P<0.05). 결론: 위암 수술 후 복강 내 체액 저류가 발생한 환자는 4기 위암 또는 타 장기 합병 절제의 경우가 많았고 체액 저류에 대하여 2/3 (41명, 35%)에서 보존적 치료로써 호전이 되었다. 경피적 배액술은 체액 저류 크기가 4 cm 이상일 때 또는 감염증이 있을 때 필요하다고 생각한다.

• International Journal of Fluid Machinery and Systems
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• 제2권1호
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• pp.92-101
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• 2009

The purpose of this paper is to gain a greater understanding of the performance of practical wind turbine generating systems with differing output power controllers and controlling means for wind turbine speed. Subjected wind turbines, both equipped with an asynchronous power generator, are located at two sites and are defined as wind turbine A and wind turbine B in this study, respectively. Their performance differences are examined by measuring wind speed and electric parameters. The study suggests that both wind turbines have a clear linkage between current and output power fluctuations. Comparison of the fluctuations to wind speed fluctuation, although they are triggered primarily by wind speed fluctuation, clearly indicates the specific behaviors inherent to the respective turbine control mechanisms.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2012년도 춘계학술논문집 1부
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• pp.177-181
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• 2012

Association is an important contribution to the overall hydrogen bonding in surfactant systems, especially in systems of colloidal and biological interest. Amphiphile systems, especially micelle and microemulsion systems, showed highly non-ideal behavior due to the intermolecular association and intramolecular association. The objective of this research is to present a lattice fluid equation of state that combines the quasi-chemical nonrandom lattice fluid model with modified Veytsman statistics for intra + inter molecular association to calculate phase behavior for mixture containing surfactant systems. The present EOS could correlate the literature data well for mixtures containing nonionic surfactant systems.

• Tuberculosis and Respiratory Diseases
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• 제75권1호
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• pp.1-8
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• 2013

Several papers on respiratory and critical care published from March 2012 to February 2013 were reviewed. From these, this study selected and summarized ten articles, in which the findings were notable, new, and interesting: effects of high-frequency oscillation ventilation on acute respiratory distress syndrome (ARDS); safety and efficacy of hydroxyethyl starch as a resuscitation fluid; long-term psychological impairments after ARDS; safety and efficacy of dexmedetomidine for sedation; B-type natriuretic peptide-guided fluid management during weaning from mechanical ventilation; adding of daily sedation interruptions to protocolized sedations for mechanical ventilation; unassisted tracheostomy collar of weaning from prolonged mechanical ventilations; and effects of nighttime intensivist staffing on the hospital mortality rates.

• Neonatal Medicine
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• 제17권2호
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• pp.168-180
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• 2010

Acute renal failure (ARF) is common in the neonatal period, however, there are no uniform treatment strategies of ARF. The main treatment strategies are conservative management including medical treatment and the renal replacement therapy. Because ARF in the newborn is commonly acquired by hypoxic ischemic injury and toxic insults, removal of all the offending causes is important. Aminoglycoside, indomethacin, and amphotericin-B are the most common nephrotoxic drugs of ARF. To relieve the possible prerenal ARF, initial fluid challenge can be followed by diuretics. If there is no response, fluid restriction and correction of electrolyte imbalance should begin. Adequate nutritional support and drug dosing according to the pharmacokinetics of such drugs will be difficult problems. Renal replacement therapies may be provided by peritoneal dialysis, intermittent hemodialysis, or hemofiltration. New promising agents, bioartificial kidney, and stem cell will enable us to extend our therapeutic repertoire.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2010년도 춘계학술대회 논문집
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• pp.157-160
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• 2010

Management of indoor air quality of underground subway station is an important issue since the limited natural ventilation, limited sunshine incoming, and highly moistured atmosphere. The improvement in IAQ of platform is expected because most stations were installed with platform screen door currently, however, the poor air quality in tunnel might be affecting subway cabin indoor. In this study, we developed the air quality assessment model based on computational fluid dynamics. The geometry of air ventilation unit, seat, LCD monitors, and passengers were modeled using commercial software (Design Modeler) and fluid pattern and pollutants trajectories were analyzed by using CFX. We predicted the thermal comfort by predicted mean vote (PMV), distribution of CO2 and PM10 concentration. It is expected that this model can be used for the performance test of air cleaners which are under development.

• Journal of Mechanical Science and Technology
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• 제19권10호
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• pp.1932-1938
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• 2005

Graphite foams consist of a network of interconnected graphite ligaments and are beginning to be applied to thermal management of electronics. The thermal conductivity of the bulk graphite foam is similar to aluminum, but graphite foam has one-fifth the density of aluminum. This combination of high thermal conductivity and low density results in a specific thermal conductivity about five times higher than that of aluminum, allowing heat to rapidly propagate into the foam. This heat is spread out over the very large surface area within the foam, enabling large amounts of energy to be transferred with relatively low temperature difference. For the purpose of graphite foam thermosyphon design in electronics cooling, various effects such as graphite foam geometry, sub-cooling, working fluid effect, and liquid level were investigated in this study. The best thermal performance was achieved with the large graphite foam, working fluid with the lowest boiling point, a liquid level with the exact height of the graphite foam, and at the lowest sub-cooling temperature.

• 한국유체기계학회 논문집
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• 제13권5호
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• pp.54-57
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• 2010

The purpose of this article is to diagnosis all aspects of waste pneumatic transportation system, in order to provide everyone interested in the subject with a optimal design and management of the system. The results of the analyzed inlet boxes were especially designed for customers' convenience and automatically operation, side air intake, ensure good wear. And key of pipelines were showed design standard as degree of an angle. Also, the system is mostly equipped with automatic control and watch conducted inside the waste collection facilities, and it will cut down excessive manpower and be able to be managed by least trained personnel.

• 동의생리병리학회지
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• 제22권2호
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• pp.481-486
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• 2008

Hiccup is one of common symptoms clinically and caused by various etiologies. We have tried researching the effect of herbal medicines(Taeumjowi-tang) to treat a Taeumin patient with severe hiccup, who is presumed cerebral vascular disease, and evaluated hiccup's a time in a minute and hiccup's total time in a day. The symptoms, not only the patient's hiccup, also his general condition including the dysphagia and right side hemiparesisis, are improved considerably. The constitutional treatment with Taeumin herbal medicines(Taeumjowi-tang) may have an effect on the management of hiccup by control of Qi and Fluid Metabolism.