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이승범,강희철,윤유정 대한가정의학회 2010 Korean Journal of Family Medicine Vol.31 No.11
The most common cause of small bowel obstruction is postoperative adhesion, and besides a hernia, metastatic or primary cancer and small bowel tumors are possible causes. Superior mesenteric artery (SMA) syndrome is a rare cause of upper gastrointestinal obstruction and is associated with debilitating conditions with marked weight loss. SMA syndrome results from the compression of the third part of the duodenum due to the narrowing of the aortomesenteric angle. We report a 28-year-old woman with SMA syndrome after acute gastroenteritis. Her stomach was severely dilated due to the duodenal obstruction and computed tomography showed the compression of the third portion of the duodenum by SMA. She was conservatively cared for and thus favorably improved. 상장간막 동맥 증후군(superior mesenteric artery syndrome)은 상장간막 동맥에 의해서 십이지장이 압박을 받음으로써소장 폐쇄가 일어나는 질환이다. 해부학적으로 복부 대동맥과 상장간막 동맥 사이에는 장간막 지방층이 있어서 각도가유지되는데, 어떤 원인으로 인하여 지방조직이 감소하면 두동맥 사이의 각이 줄어들고 간격이 좁아지면 십이지장의 제3부위에 해당하는 횡행부가 압박을 받아 소장 폐쇄가 발생하는 병으로 원인은 화상, 악성종양, 외상에 의한 석고 붕대, 척추질환으로 수술, 섭식장애 또는 흡수장애 등이 알려져 있다. 드물게 28세 여자환자가 급성위장염으로 인한 체중감소로 상장간막 동맥 증후군이 발생하여 입원하여 보존치료 후 회복하였기에 이를 증례보고 한다.
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리틀야구 선수들의 진로지원 실태와 개선방안에 관한 연구
이승범,박노준 한국웰니스학회 2014 한국웰니스학회지 Vol.9 No.1
본 연구는 리틀야구선수들의 진로선택 실태를 파악한 후 진로지원에 필요한 효과적인 개선방안에 대해 알아보고자 하는데 그목적이 있다. 연구수행을 위해 전문가 집단의 의견수렴을 통한 효과적인 의견을 도출해내는 델파이 기법을 실시하였다. 설문지를연구도구로 사용하였으며, 델파이 기법의 전문가 선정은 유목적 표집을 통해 총 80명을 선정하였다. 델파이 라운드는 총 3라운드를 실시하였으며 수집된 자료는 중간값과 사분위범위로 분석되었다. 연구결과는 다음과 같다. 선수들의 진로선택에 있어 상급학교의 부족, 야구부 선수 정원제한 제도, 리틀야구 상위리그 확대에 필요한 정책과 인프라 부족, 대회 개최에만 집중하는 현실 정책등이 문제점이 된다고 하였으며, 선수들의 진로지원을 위해서는 엘리트 팀 창단 및 저변확대 제도, 리틀야구 선수의 진학 제도화,특기자 정원 인원수 제한 폐지, 지역 야구부 상급학교와의 진학 정보공유 제도, 주니어리그 확대 및 단계적 리그 제도화 등이 시행되어야 한다고 제안되었다. This study aims at understanding the actual condition of career choice in little-league baseball players and effectiveimprovement plans for supporting their career. Delphi technique was used to carry out the study and draw out effective resultsby collecting the opinions of expert group. Survey sheets were used as a tool for the study, and delphi technique was employedto select 80 subjects as a whole by means of purposeful collection. Three rounds were carried out for a delphi round, and thedata collected were analyzed through medians and quadrant of the upper range. The results are as follow. Insufficientupper-class schools, system limiting the quorum of baseball team players, insufficient policies and infrastructures needed toexpand little baseball top league, and actual policies that concentrate on holding the competition were mentioned as the issue,and they suggested that several policies should be carried out in order to support careers of the athletes as below: 1) a systemto expand the base and create elite teams, 2) systemizing the little-league baseball players to enter public schools, 3) abolition oflimits on the quorum of student athletes, 4) information sharing system to enter local upper-class schools with baseball clubs, 5)expansion of a junior-league and step-by-step league systemization.
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Optimum process and energy density analysis of canola oil biodiesel synthesis
이승범,Kyong Ho Han,이재동,In Kwon Hong 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.6
Biodiesel has been recommended as an environmentally benign alternative fuel because it emits a comparatively small amount of air pollutants. Biodiesel can be processed from canola oil, which has a low liquefaction temperature owing to its high unsaturated fatty acid content, which also limits its engine-clogging effects. In this study, optimum conditions such as the amount of methanol, the alkali catalyst, and the reaction temperature were determined for production of biodiesel from canola oil. A maximum biodiesel yield was shown at an oil/methanol mole ratio of 1:6. The optimum amount of catalyst was 1 wt% of potassium hydroxide. The biodiesel yield and the methyl ester content were high when the reaction temperature was 55 8C. The consolute temperature for determining the maximum biodiesel yield was proposed in consideration of the boiling point of methanol. The energy density was analyzed for the final products of biodiesel in comparison to the raw canola oil and other plant oil based biodiesels. 2010 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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마이크로웨이브 에너지를 이용한 폐식용유 원료 바이오디젤의 제조: Box-Behnken 설계를 이용한 최적화
이승범,장현식,유봉호 한국공업화학회 2018 공업화학 Vol.29 No.6
본 연구에서는 마이크로웨이브 에너지를 이용하여 폐식용유로부터 바이오디젤을 제조하고, Box-Behnken 설계를 이용하여 공정의 최적화를 설계하였다. Box-Behnken 설계의 계량인자는 메탄올/유지 몰비, 마이크로웨이브 조사세기, 반응시간으로 설정하였고, 계측인자는 FAME 함량이다. 기초실험 결과 산가에 관계없이 계량인자인 메탄올/유지 몰비(8~10)와 반응시간(4~6 min)의 범위는 동일하게 설정하였으며, 마이크로웨이브 조사세기의 경우 산가 1.30 mg KOH/g (8~12 W/g)와 2.00 mg KOH/g (10~14 W/g)로 설정하였다. Box-Behnken 설계에 의해 예측된 바이오디젤 제조공정의최적조건은 산가 1.30 mg KOH/g인 폐식용유의 경우 메탄올/유지 몰비(7.58), 마이크로웨이브 조사세기(10.26 W/g), 반응시간(5.1 min)이었고, 산가 2.00 mg KOH/g의 경우 메탄올/유지 몰비(7.78), 마이크로웨이브 조사세기(12.18 W/g), 반응시간(5.1 min)로 산출되었다. 이때 예측 FAME 함량은 각각 98.4, 96.3%로 나타났으며, 실제 실험을 통한 오차율은0.3% 이하로 나타났다. 따라서 마이크로웨이브를 이용한 바이오디젤의 제조공정에 Box-Behnken 설계를 적용할 수 있을 것으로 사료된다.
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유산소ㆍ저항성 트레이닝이 노인의 성장호르몬, 항산화 방어체계 및 apoptotic 유전적 발현요인에 미치는 영향
이승범 한국생명과학회 2008 생명과학회지 Vol.18 No.9
The purpose of the study was to examine the changes of growth hormone, antioxidant defense system and apoptotic factor in older individuals after a 12 weeks. 24 elderly(untraining group (U·G: n=8), aerobic training group (A·G: n=8), weight training group (W·G: n=8)) volunteered to participate in the study. The results were analyzed by two-way ANOVA with repeated measure. The result were as follows; Growth hormone, SOD did not show any significant difference with groups and time. CAT was significantly increased before and after with aerobic training group (p<0.05). CAT was significantly increased before and after with weight training group(p<0.001). GPX was significantly increased before and after with aerobic training group (p<0.05). TNFα did not show any significant difference with groups and time. it was concluded that both aerobic training group and weight training group had positive effects on antioxidant defense system.
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이승범,이재동 한국폐기물자원순환학회 2009 한국폐기물자원순환학회지 Vol.26 No.8
This study were performed to develop the selective purification method of waste chicken oil for using bioenergy source and animal feed. The waste chicken oil was purified by the degumming, deacidification, and bleaching process. The performance of purified chicken-oil was evaluated by the acidic value and absorbance(400nm). The chicken-oil was degummed by 0.1~0.3wt% of phosphoric acid, citric acid, and acetic acid, Also, was bleached by the activated acidic clay, acidic clay, and bentonite, The acid value was more decreased when phosphoric acid used than citric acid and acetic acid in the degumming process. The optimum adsorbent of bleaching process was the activated acidic clay. The contents of fatty acid methyl ester was reached to about 92.8% in the transesterification reaction of the purified chicken oil.
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