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Laser sheet 광을 이용한 디젤분무의 성장에 관한 연구
서경일(K.I.Se),천무권(M.K.Chun),차건종(K.J.Cha),김덕줄(D.J.Kim) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_1
Diesel engine plays an important role in heavy industry and transportation owing to its high thermal efficiency compared with others. But, because these engines are producing pollution substances such as Soo, NOx, etc., air pollution is especially serious in industrial area and urban area. So recent major research and development studies in diesel engines are changing toward point to purify the polluted environment In diesel engines, the geometric structure of nozzle and the microscopic and macroscopic mixing processes between the injected fuel and the ambient gas have a great influence on the formation of Soot and NOx emissions. In this study, the inner microscopic structure and growth process of a non-evaporating diesel spray at different injection pressures and ambient pressures were investigated using laser sheet beam. These results were compared with those of impinged spray that is briskly studied now as a manner to decrease the exhaust emissions under the same conditions.
서경아 ( Seo Gyeong A ),김민정 ( Kim Min Jeong ),이귀세라 ( Lee Gwi Se La ),신종철 ( Sin Jong Cheol ),김수평 ( Kim Su Pyeong ),나종구 ( Na Jong Gu ),김사진 ( Kim Sa Jin ) 대한산부인과학회 2004 Obstetrics & Gynecology Science Vol.47 No.1
목적 : Hyrtl 문합과 그 유형을 확인하고, 산과적 예후에 미치는 영향을 알아보고자 본 연구를 시행하였다. 연구 방법 : 산모 904예에서 분만후 황산 바륨 용액을 제대 동맥에 주입한 후, 박리하여 Hyrtl 문합을 확인하였다. Hyrtl 문합이 산과적 예후에 미치는 영향을 알아보기 위하여 출생아의 체중, Apgar Score, 제대혈 가스 분석 결과, 산과적 합병증 등을 의무기록을 통하여 조사하였다. 결과 : 전체 904예 중 99.7%에서 Hyr Objective : This study was conducted to investigate the presence and pattern of Hyrtl anastomosis, and to examine the effect that each type has on obstetrical outcome. Methods : This study was carried out from January of 2001 to May of 2003 on 904 randoml
라섹 수술 후 통증에 대한 비스테로이드성 항염증 점안액의 선행 진통 효과
김세경,홍진표,남상민,서경률.Se Kyung Kim. MD. Jin Pyo Hong. MD. Sang Min Nam. MD. Kyoung Yul Seo. MD. PhD 대한안과학회 2011 대한안과학회지 Vol.52 No.12
Purpose: To assess the preemptive analgesic effect of topical NSAIDs (0.5% ketorolac tromethamine, Acular) as postoperative pain relief in patients undergoing LASEK. Methods: A prospective, randomized, placebo-controlled, paired eye study was performed. Patients undergoing LASEK were randomized to receive 0.5% ketorolac in one eye and 0.3% ofloxacin (placebo) in the contralateral eye at 30 minutes, 20 minutes, or ten minutes prior to LASEK. Pain was assessed using a visual analog scale of 0 to 10 in each eye 6, 12, 24, 36, 48 and 72 hours after surgery. Patients were also asked to assess the levels of glare, tearing and irritation using a visual analog scale from 0 to 10. Results: A total of 62 eyes from 31 patients were enrolled in the present study. The mean postoperative pain score in the NSAID group was significantly lower than that in the placebo group at postoperative hours 6 (2.35 versus 4.97), 12 (2.52 versus 5.16), and 24 (3.84 versus 4.94) (p < 0.05). The mean postoperative pain score after 36 and 48hours was also lower in the NSAID group than in the placebo group, but the differences were not statistically significant (p > 0.05). Patients reported significantly less tearing and irritation in the NSAID-administered eye compared to those in the placebo eye after LASEK (p < 0.05). Conclusions: Preemptive administration of topical NSAIDs before LASEK was effective in reducing acute postoperative pain. Preemptive analgesia with topical NSAIDs may be a valuable treatment option for controlling postoperative pain following ocular surgery. J Korean Ophthalmol Soc 2011;52(12):1414-1418
비구면 일체형 인공수정체 삽입 후 동공 크기가 시력에 미치는 영향
한진우,한경은,안지민,정세환,이형근,서경률,김응권,김태임,Jinu Han,Kyung Eun Han,Ji Min Ahn,Se Hwan Jeong,Hyung Keun Lee,Kyoung Yul Seo,Eung Kweon Kim,Tae Im Kim 대한안과학회 2012 대한안과학회지 Vol.53 No.11
Purpose: To evaluate the influence of pupil size on uncorrected visual acuity and spherical aberration of the TECNIS 1-piece intraocular lens (IOL). Methods: In this study 61 eyes were implanted with a TECNIS 1-piece IOL. Pupil size was checked by standard pupil card with cobalt blue light postoperatively. Best corrected visual acuity (BCVA) and uncorrected visual acuity (UCVA) were assessed postoperatively. Total spherical aberration and high-order aberration for mesopic pupil size zone were measured. Results: There were no significant differences of spherical equivalent, age, preoperative astigmatism, BCVA between two groups, but small pupil group revealed better UCVA (p = 0.02) and lower ocular aberration than large pupil group. Conclusions: After cataract surgery, pupil size greater than 5.0 mm increases total aberration. Thus, visual acuity with small pupil after aspheric TECNIS 1-piece IOL implantation show better clinical result on uncorrected visual acuity.
노인을 위한 당뇨병 자기관리 지식 측정 도구(DSMK-O) 개발
송미순(Song, Misoon),김세안(Kim, Se-an),최수영(Choi, Suyoung),서경산(Seo, Kyoungsan),이수진(Lee, Soo Jin),김은호(Kim, Eun Ho) 한국노년학회 2013 한국노년학 Vol.33 No.3
본 연구는 당뇨병 노인에게 적용 가능한 당뇨병 자기관리 행위와 관련된 지식 정도를 확인할 수 있는 도구(Diabetes Self-Management Knowledge for Older Adults, DSMK-O) 를 개발하기 위한 방법론적 연구이다. 문헌고찰과 미국당뇨교육자협회가 제시한 자기관리 표준의 7개 자기관리 영역을 기초로 23문항의 DSMK-O 도구의 예비문항을 구성 후, 4명의 전문가 집단으로부터 내용타당도를 검증받았다, 타당도 및 신뢰도 확인을 위하여 65세 이상 노인복지회관을 이용하는 당뇨병 노인 150명을 대상으로 일대일 면담을 통해 DSMK-O 도구로 자료수집을 하였다. 신뢰도는 K-R 20으로 측정하여 .539이었다. DSMK-O점수는 동시에 측정한 당뇨병 지식도구(Diabetes Knowledge Test) (r=.366, p<.001), 당뇨병 자기관리 수행 정도(Summary of Diabetes Self-Care Activities) (r=.293, p<.001)점수와 유의한 상관관계를 보여 준거타당도가 지지되었다. 수렴타당도 평가를 위해 당뇨병 교육 경험의 유무에 따른 DSMK-O 점수를 평가한 결과 유의한 차이가 있어(p<.001) 수렴타당도가 지지되었다. 그러나 구성타당도를 위해 적용한 요인분석은 7개영역으로 구분되지 않았다. 최종 확정된 22개문항의 DSMK-O 정답률은 문항에 따라 24.7-98.7% 범위이고 평균정답률은 75.22%이었다. 본 연구에서 개발된 DSMK-O는 당뇨병 노인의 당뇨병 자기관리 지식 정도를 측정하고 자기관리 교육의 효과를 평가하는데 유용하게 사용할 수 있을 것이다. This study aimed to develop and validate the Diabetes Self-Management Knowledge Scale for Older Adults (DSMK-O). Preliminary items were developed according to a literature review and the guidelines set by the American Association of Diabetes Educators (AADE). The preliminary 23-item DSMK-O scale of 7 self-management domains were evaluated for content validity by experts. After a pilot test with older adults, a survey was performed with 150 community-dwelling older adults with diabetes to confirm both the reliability and validity of the scale. The reliability by K-R 20 was .539. As the result of the criterion-related validity, the DSMK-O score was significantly correlated with the Diabetes Knowledge Test (r = .366, p < .001), and Summary of Diabetes Self-Care Activities (r = .293, p < .001). Subjects who had previous diabetes education scored significantly higher on the DSMK-O than subjects who had not (p < .001), which supported convergent validity. The percentage of correct answers for each item ranged from 24.7% to 98.7%, and the total item mean was 75.22%. In conclusion, the DSMK-O scale showed acceptable reliability and validity and can be utilized to test the diabetes self-management knowledge of older community-dwelling adults.