초등학교 멀리뛰기수업에서의 교수행동분석

서정기(Jeong Ki Seo) 한국체육교육학회 2005 한국체육교육학회지 Vol.10 No.2

열변성 물질을 이용한 지하수 온도 측정용 광섬유 온도센서의 특성분석

서정기 ( Jeong Ki Seo ),유욱재 ( Wook Jae Yoo ),조동현 ( Dong Hyun Cho ),장경원 ( Kyoung Won Jang ),허지연 ( Ji Yeon Heo ),이봉수 ( Bong Soo Lee ),고용권 ( Yong Kwon Koh ) 한국센서학회 2009 센서학회지 Vol.18 No.6

운동중재프로그램이 비만아동의 인슐린 저항성, 동맥경화 지수 변화에 미치는 영향

서정기(Seo, Jeong-Ki),박순희(Park, Sun-Hee) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.2

The purpose of this study was to examine the effect on the body composition, insulin resistance and the atherogenic index by carrying out the exercise intervention program in obese children. It formed 37 obese children, who are attending elementary school where is located in C city, were composed of 18 people for experimental group and 19 people for control group. And then, the music rope-skipping was operated with 3 times a week and 50 minutes in daily exercise time by applying the principle of gradual overload with 1~4 weeks(HRmax 55-64%) and 5~12 weeks(HRmax 65-75%). Also. the participants in experiment were allowed to check daily activity volume by putting on passometer. This was utilized as data for modifying behavior. The Habit Modifying Program was formed in order to be modified the wrong dietary, exercise, and living habit, and was carried out for 12 weeks once a week by 1 hour. The results of this study were as follows. First, as for body composition, there was no change in weight after carrying out in the group of exercise intervention program. There was significant reduction in body fat ratio and BMI. On the other hand, the control group was increased weight significantly, and was indicated to have no significant difference in body fat ratio and BMI. Second, the insulin resistance reduced significantly after carrying out in the group of exercise intervention program. The control group wasn’t shown significant difference. Third, atherogenic index(TC/HDL-C, TG/HDL-C, LDL-C/HDL-C) reduced significantly after carrying out in the group of exercise intervention program. The control group was significantly increased in TG/HDL-C. TC/HDL-C and LDL-C/HDL-C weren’t shown significant difference. In conclusion, the exercise in tervention program for 12 weeks was indicated to have positive influence upon insulin resistance and the atherogenic index variables of obese children.

학교 내 건강 활동 프로그램이 비만아동의 대사성증후군 위험인자에 미치는 효과

서정기(Jeong Ki Seo) 한국체육교육학회 2011 한국체육교육학회지 Vol.16 No.4

본 연구의 목적은 여자 비만아동에게 학교 내 건강 활동 프로그램을 12주간 실시하여 신체조성, 대사성증후군 위험인자의 변화에 미치는 효과를 알아보고자 하였다. C시에 소재한 초등학교에 재학 중인 여자 비만아동 20명을 실험집단 10명, 통제집단 10명으로 구성한 뒤 건강 활동 프로그램을 음악줄넘기와 행동수정요법을 병행하여 운영하였다. 프로그램 실시 전·후 피험자의 신체조성, 대사성 증후군 위험인자(허리둘레, 혈압, HDL-C, TG, Glucose)를 분석하였다. 측정항목에 대한 자료처리는 평균과 표준편차를 산출했으며 two-way repeated ANOVA와 t-test를 실시하였다. 연구결과 신체조성은 실험집단이 프로그램 실시 후 체중의 변화는 없었지만 체지방률과 BMI에서 유의하게 감소하였다. 또한 대사성증후군 위험인자는 실험집단이 프로그램 실시 후 HDL-C는 유의하게 증가하였고, 수축기혈압은 유의하게 감소하였다. 그러나 허리둘레, 이완기혈압, TG, Glucose에서는 유의한 차이가 나타나지 않았다. The purpose of this study was to examine the effects on body composition and metabolic syndrome risk factors after carrying out the Health Activity Program in school on female obese children for 12 weeks. The study included 20 female obese children who attend elementary school located in C city, with 10 children in the experimental group and 10 children in the control group. The Health Activity Program was coordinated with musical rope-skipping and the Habit Modifying Program. It analyzed the subjects` body composition and metabolic syndrome risk factors (waist, blood pressure, HDL-C, Glucose, TG, before and after carrying out the program. Data processing on measurement items calculated the mean and standard deviation. The statistical analysis consisted of two-way repeated ANOVA and t-tests. The results of this study were as follows. In body composition, the experimental group didn`t show a difference in weight but decreased significantly in the body fat percentage and BMI. In metabolic syndrome risk factors, the experimental group increased significantly in HDL-C but decreased significantly in SBP after carrying out program and didn`t show a significant difference in waist, DBP, TG, and Glucose.

윤상인두근 운동이상증 치험

서정기(Jeong Kee Seo),박효진(Hyo Jin Park),이두연(Doo Yeon Lee),김기황(Ki Whang Kim),오세창(Se Chang Oh),전재윤(Chae Yoon Chon),박인서(In Suh Park) 대한소화기학회 1997 대한소화기학회지 Vol.29 No.2

Cricopharyngeal dyskinesia is termed complete or incomplete failure of relaxation of the cricopharyngeus muscle and is one of the cause of dysphagia. Reduced maximal distensibility or compliance of cricopharyngeus muscle results in dysphagia, globus sensation, aspiration and repeated pulmonary infection. We experienced a case of cricopharyngeal dyskinesia in a 75-year- old female who complained of dysphagia. She was treated by cricopharyngeal myotomy with improvement in her symptom. (Korean J Gastroenterol 1997; 29: 247 - 251)

경색관련 관동맥의 잔여 협착 진단에 있어 조기 부하 심근 SPECT에 대한 관동맥 조영검사 및 심근 분획 혈류 예비력과의 비교 평가

서정기(Jeong Kee Seo),권준(Jun Kwan),김대혁(Dae Hyeok Kim),양성식(Sung Sik Yang),이기훈(Ki Hoon Lee),현인영(In Young Hyun),최원식(Won Sick Choe),이효정(Hyo Jung Lee),박금수(Keum Soo Park),이우형(Woo Hyung Lee) 대한내과학회 2001 대한내과학회지 Vol.60 No.2

Background : The detection of residual stenosis of infarct related artery (IRA) at early stage after acute myocardial infarction (AMI) is crucial in clinical decision making for interventional revascularization. The aim of this study was to evaluate the relevancy of early dipyridamole stress myocardial SPECT to detect functionally and luminologically significant residual stenosis of IRA after AMI. Methods : Twenty five consecutive patients (M:F=19:6, age: 56±13yrs) with AMI were underwent SPECT and coronary angiography within 5 days of the attack. Infarct related arteries with FFR < 0.75 and diameter stenosis (DST) >70% were regarded to have functionally and morphologically significant residual stenosis. Reversible perfusion defect was defined if there was improvement of pefusion score more than one grade in infarct segments on rest images of SPECT compared with stress images. Results : Mean FFR and DST were 0.76±0.14 and 74±15%. SPECT showed no significant correlation with both FFR and DST with Kendall's coefficiency of 0.28 (p=0.05) and 0.13 (p=0.35). The sensitivity and specificity of SPECT to detect functionally and morphologically significant residual stenosis were 92%, 31% and 83%, 29%. Conclusion : The early dipyridamole stress myocardial SPECT after AMI dose not seem to be a useful non-invasive test for the detection of functionally and luminologically significant residual stenosis of IRA.(Korean J Med 60:106-114, 2001)

Effect of Enrofloxacin on Post Weaning Diarrhea in Pig

예재길,서정기,김병기,이창구,한병우,Yeh Jae-Gil,Seo Jeong-Ki,Kim Byeung-Gie,Lee Chang-Koo,Han Byung-Woo The Korean Society of Veterinary Clinics 1991 한국임상수의학회지 Vol.8 No.1

돼지의 이유자돈 설사병을 효과적으로 치료, 예방하고자 Enrofloxacin(Baytril premix)을 사료에 혼합투여하여 설사 발생여부, 증체량, 사료요구율, 돈분내 대장균수의 변화, 분리한 대장균의 항균물질에 대한 감수성을 조사하여 다음과 같은 결과를 얻었다. 1. 이유자돈에 Baytril premix를 급여하였던 바 대조구보다 62일령에서 체중은 3.2kg의 통계적 유의차이를 보여(p<0.01) 현저한 증체효과 나타내었으며, 사료요구율도 계선되었고 설사발생도 예방할 수 있었다. 2. Baytril Premix를 급여한 자돈의 분변내 대장균수는 3.14$\times$$10^{8}$에서 5일후 2$\times$$10^{7}$ 개/g 10일후 1$\times$$10^{5}$개/g으로 현저히 감소하였다. 3. 공시농장에서 분리한 E. coli 10중의 항균물질에 대한 감수성은 baytril, gentamicin 및 trimeoprim+sulfamethoxazole에 감수성이 우수하였다.다. For the purpose of effective therapy and prevention of post weaning E. coli diarrhea, Enrofloxacin-(Baytril premix) was administered in the feed and a series of investigations were made the occurence of diarrhea, weight gain, feed conversion rate, changes In the counts of faecal E. coli and susceptibility of the isolated E. coli strains to antimicrobials. The results obtained were as follows 1. The weaned piglets which were treated with Baytril premix gained the average body weight of 3.2kg over the control group at the age of 62 days. The result indicates a marked weight gain effect which, by statiscal analysis, showed a significant difference(P<0.01). Administration of Baytril premix also resulted in the improvement of feed conversion rate and provention of post weaning diarrhea. 2. The counts of faecal E. coli in Baytri premx treated piglets showed a marked decrease from 3.14${\times}$10$\^$8/cells/g to 2${\times}$10$\^$7/cells/g at 5days post treatment and 1${\times}$10$\^$5/cells/g at 10 days post treatment. 3. 10 strains of E. coli isolated fred the experimental pig farm were highly susceptible to Bayoil, gentamicin and trimethoprim plus sulfamethoxazole.

과학기술위성 3호용 홀 추력기 시스템 비행모델 연구개발

서미희(Mihui Seo),이종섭(Jongsub Lee),신구환(Goo-Hwan Shin),박홍영(Hong-Yong Park),서정기(Jung-Ki Seo),장태성(Tae-Seong Jang),차원호(Won-Ho Cha),이성호(Seong-Ho Lee),조희근(Hee-Keun Cho),전은용(Eunyong Chun),정연황(Yunhwang Jeong),선종 한국추진공학회 2012 한국추진공학회 학술대회논문집 Vol.2012 No.11

최근 들어 위성군, 편대비행 등과 같은 고등임무의 가능성에 의해 소형위성에 대한 관심이 갈수록 커지고 있으며 관련 연구개발이 활발히 진행되고 있다. 이와 같이 위성의 활용범위를 넓히기 위해서는 정밀한 위성의 자세제어와 상황에 따른 궤도수정 혹은 천이 기술을 가능케 하는 고효율 저전력 전기추력기가 반드시 필요하다. 국내기술에 의한 전기추력기의 기술 확보를 목표로 저전력 홀(Hall)방식 전기추력기의 연구개발이 국내 여러 기관들의 협력 하에 지난 수년 간 진행되어, 2012년 12월 발사예정인 과학기술위성 3호를 위한 추력부, 전력부, 연료부 및 제어부로 구성된 홀 추력기 통합시스템의 비행모델의 개발이 완료되었다. 개발된 비행모델은 양극전력 200 W, 제논 연료유량 8 sccm으로 11 mN 추력과 35.5 % 추진효율, 1270~1300 s의 비추력을 발생시켜 연구개발 목표치를 상회하는 결과를 얻었으며, 진동시험, 열진공시험 및 통합 성능시험을 수행하여 우주와 유사한 환경 하에서 정상동작하는 것을 확인하였다. 개발된 홀 추력기는 과학기술위성 3호 뿐만 아니라 국내에서 개발 제작되는 소형 인공위성의 다양한 임무수행에 있어 활용가능성을 높여줄 것이며, kW급 이상의 홀추력기 개발에 초석이 될 것으로 기대한다. As the small satellites are expected to replace the large satellite for some of the advanced missions through constellation and formation flying, the low power and high performance propulsion system, i.e. electrical thruster, is considered to be a key element that enable detailed attitude control and orbit transfer of the satellite. In order to achieve the domestic electric propulsion technology, a flight model of the compact 10 mN class Hall thruster propulsion system (HPS) for STSAT-3 has been developed as collaborative research with several domestic institutions. The HPS consists of thruster head unit, power processing module, xenon feeding system, and propulsion control module. Performance test of the flight model Hall thruster demonstrates 11 mN thrust, 35.5% thrust efficiency, 1270~1300 s specific impulse at 200 W anode power and 8 sccm Xe flow rate. The integration test, vibration test, and vacuum·thermal test were performed to verify the normal operation of the HPS under the space and launch environment.

졸-겔 필름을 이용한 반사형 광섬유 pH 센서의 개발

유욱재 ( Wook Jae Yoo ),서정기 ( Jeong Ki Seo ),장경원 ( Kyoung Won Jang ),문진수 ( Jin Soo Moon ),한기택 ( Ki Tek Han ),박장연 ( Jang Yeon Park ),이봉수 ( Bong Soo Lee ),조승현 ( Seung Hyun Cho ),허지연 ( Ji Yeon Heo ),박병기 ( B 한국센서학회 2011 센서학회지 Vol.20 No.4

A reflection-type fiber-optic pH sensor, which is composed of a pH sol-gel film, plastic optical fibers, a mirror, a light source and a spectrometer, is developed in this study. As pH indicators, a bromthymol blue, a cresol red and a thymol blue are used, and they are immobilized in the sol-gel films. The emitted light from a light source is guided by a fiber-optic Y-coupler and plastic optical fibers to the pH sol-gel film in a pH sensing probe. The pH change in the sensing probe gives rise to a change in the color of the pH sol-gel film, and the optical characteristic of reflected light through the pH sol-gel film is also changed. Therefore, we have measured the spectra of reflected lights, which are changed according to the color variations of the pH sol-gel films with different pH values, by using of a spectrometer. Also, the relationships between the pH values and the intensities of reflected lights are obtained on the basis of the color variations of the pH sol-gel films.

Blue Rubber Bleb Nevus Syndrome 1예

강기수,오현주,고재성,서정기,박귀원,강경훈,김우선,Kang, Ki-Soo,Oh, Hyun-Ju,Ko, Jae-Sung,Seo, Jeong-Kee,Park, Kwi-Won,Kang, Gyeong-Hoon,Kim, Woo-Sun 대한소아소화기영양학회 2008 Pediatric gastroenterology, hepatology & nutrition Vol.11 No.2

저자들은 만성적인 철결핍성 빈혈을 보이는 10세 여아에서, 캡슐내시경을 비롯한 내시경적 검사로 위장관계의 다발성 정맥기형을 발견하여 blue rubber bleb nevus syndrome으로 진단하였고, 광범위한 외과적 절제술로 성공적으로 치료하였기에 이에 보고하는 바이다. We report a 10-year-old girl with the blue rubber bleb nevus syndrome (BRBNS) who had chronic severe anemia caused by chronic occult bleeding in the gastrointestinal (GI) tract. The patient was admitted to the hospital frequently for recurrent pallor and fatigue since the age of 7 years. Gastroduodenoscopy and capsule endoscopy revealed multiple venous malformations with blood oozing in the stomach, small bowel and colon. The patient was treated by aggressive surgical resection of the 23 vascular malformations in the GI tract. The patient is well without anemia 15 months post surgery.