QT연장 증후군 환자에서 Head-Up Tilt Test에 의해 유발된 Torsades De Pointes 1례

전익수,차태준,김길수,김동완,김규종,김찬욱,김성만,주승재,이재우 대한순환기학회 2000 Korean Circulation Journal Vol.30 No.8

마이크로 엔드밀링에서 음향방출 신호를 이용한 상태감시

정연식,강익수,김전하,강명창,김정석,안중환 한국공작기계학회 2004 한국공작기계학회 추계학술대회논문집 Vol.2004 No.-

Ultraprecision machining and MEMS technology have been taken more and more important position in machining of microparts. Micro endmilling is one of the prominent technology that has wide spectrum of application field ranging from macro parts to micro products. Also, the method of micro-grooving using micro endmilling is used widely owing to many merit, but has problems of precision and quality of products due to tool wear and tool fracture. This investigation deals with state monitoring using acoustic emission(AE) signal in the micro-grooving. Characteristic evaluation of AE raw signal, AE hit and frequency analysis for state monitoring is also presented in the paper.

가금티푸스 저항성 계통 선발을 위한 산란종계의 경제능력 검정에 관한 연구

한성욱,이봉덕,전익수 충남대학교 농업과학연구소 2001 농업과학연구 Vol.28 No.2

가금티푸스에 저항성을 가진 합성종을 생산하기 위하여 갈색계통인 이사(ISA), 하이라인(Hyline), 로만(Lohman) 3 계통과, 백색계통인 인사 (ISA) 및 로만(Lohman) 2 계통의 종계(PS)에 대한 생존율, 사료섭취량, 체중, 성성숙일령, 시산 난중, 및 난질을 조사하였다. 성계 암컷 생존율(34주∼66주)은 갈색계통과 백색계통에서 각각 93.3%, 93.5%로 차이가 없었고, 수컷 생존율에도 차이가 없었다(P>0.05). 수당사료 섭취량(21∼66주)은 암컷에서 갈색계통과 백색계통이 각각 113.9g과 114.3g으로 비슷한 수준이었으며, 수컷에서도 차이가 없었다. 성계 체중은 암·수 공히 갈색 산란종계 3계통 및 백색 산란종계 2계통간에 유의한 차이가 없었다. 갈색과 백색 산란종계의 체중을 비교해 보면, 갈색 산란종계가 암컷과 수컷 모두 백색 산란종계 에 비하여 무거웠으나, 반복간에 변이가 워낙 커서 유의성은 검출되지 않았다. 성성숙일령은 갈색계통과 백색계통이 각각 147.8일과 140.5일로 갈색계통이 7일정도 늦었다(P<0.05). 산란율은 23-66주에서 갈색과 백색계통이 각각 75.0% 및 81.4%로 백색계통이 약 6% 높았다(P<0.05). 39주령에 갈색란과 백색란의 난질 성적을 비교해보면 Haugh Unit, 난형계수, 난황색, 난중에 있어서는 유의한 차이가 검출되지 않았다. 그러나 난각두께는 갈색 산란계통의 계란이 더 두꺼웠고, 난각강도도 유의하게 강한 것으로 나타났다. A preliminary experiment was conducted to produce fowl-typhoid resistant egg type breeds, using three brown egg layer breeders (ISA, Hyline, and Lohman) and two white egg layer breeders (ISA and Lohman). Various economic parameters were measured from day-old to mature stages using parent stocks of each breed. No significant difference in viabilities of mature hens from 34 to 66 wk of ages was found between brown(93.3%) and white(93.5%) egg layer breeders (P>0.05). Also, there was no difference in viabilities of mature cockerels. Although not significant the mature body weights of brown egg layer breeders tended to be heavier than those of the white egg layer breeders both in hens and cockerels. No difference in feed intakes of mature brown and white hens were detected. Ages of sexual maturity of white and brown egg layer hens were 147.7 and 140.5 d, respectively (P<0.05). Egg production of white egg layer hens during 23-66 weeks age was significantly higher than their counterpart (81.4% vs. 75.0%). Comparisons of Haugh Unit, egg shape index, yolk color, and egg weight between brown and white eggs were not significantly different, however, the brown eggshells were thicker and stronger than those of white eggs (P<0.05).

C-means 알고리즘을 이용한 마이크로 엔드밀의 상태 감시

권동희,정연식,강익수,김전하,김정석 한국공작기계학회 2005 한국공작기계학회 춘계학술대회논문집 Vol.2005 No.-

Recently, the advanced industries using micro parts are rapidly growing. Micro end milling is one of the prominent technology that has wide spectrum of application field ranging from macro to micro parts. Also, the method of micro-grooving using micro end milling is used widely owing to many merit, but has problems of precision and quality of products due to tool wear and tool fracture. This study deals with condition monitoring using acoustic emission(AE) signal in the micro-grooving. First, the feature extraction of AE signal directly related to machining process is executed. Then, the distinctive micro end mill state according to the each tool condition is classified by using the fuzzy C-means algorithm, which is one of the methods to recognize data patterns. These result is effective monitoring method of micro end mill state by the AE sensing techniques which can be expected to be applicable to micro machining processes in the future.

Two Methods of Setting Positive End-expiratory Pressure in Acute Lung Injury: An Experimental Computed Tomography Volumetric Study

Jeon, Kyeongman,Jeon, Ik Soo,Suh, Gee Young,Chung, Man Pyo,Koh, Won-Jung,Kim, Hojoong,Kwon, O Jung,Han, Dai-Hee,Chung, Myung Jin,Lee, Kyung Soo The Korean Academy of Medical Sciences 2007 JOURNAL OF KOREAN MEDICAL SCIENCE Vol.22 No.3

<P>This study was conducted to observe effects of two methods of setting positive end-expiratory pressure (PEEP) based on the pressure-volume (PV) curve. After lung injury was induced by oleic acid in six mongrel adult dogs, the inflation PV curve was traced and the lower inflection point (LIP) was measured. The 'PEEP<SUB>INF</SUB>' was defined as LIP+2 cmH<SUB>2</SUB>O. After recruitment maneuver to move the lung physiology to the deflation limb of PV curve, decremental PEEP was applied. The lowest level of PEEP that did not result in a significant drop in PaO<SUB>2</SUB> was defined as the 'PEEP<SUB>DEF</SUB>'. Arterial blood gases, lung mechanics, hemodynamics, and lung volumes (measured on computed tomography during end-expiratory pause) were measured at PEEP of 0 cmH<SUB>2</SUB>O, PEEP<SUB>INF</SUB> and PEEP<SUB>DEF</SUB> sequentially. The median PEEP<SUB>INF</SUB> was 13.4 cm H<SUB>2</SUB>O (interquartile range, 12.5-14.3) and median PEEP<SUB>DEF</SUB> was 12.0 cm H<SUB>2</SUB>O (10.0-16.5) (<I>p</I>=0.813). PEEP<SUB>DEF</SUB> was associated with significantly higher PaO<SUB>2</SUB> and lung volumes, and significantly lower shunt fraction and cardiac index when compared to PEEP<SUB>INF</SUB> (<I>p</I><0.05). Setting the PEEP based on the deflation limb of the PV curve was useful in improving oxygenation and lung volumes in a canine lung injury model.</P>

Production of Chick - Quail Chimera by Artificial In Vitro Culture System

Ik Soo Jeon,Hwan Hoo Seong,Sea Hwan Sohn,Tamao Ono 한국동물자원과학회 ( 구 한국축산학회 ) 1996 한국축산학회 심포지움자료집 Vol.- No.-

Effect of Glutamine in Freezing Extender on Post-thaw Motility of Bull Sperm

Ik-Soo Jeon,Jae-Woong Ryoo 한국실험동물학회 2000 Laboratory Animal Research Vol.16 No.3

난황항체제제(IgY) 첨가가 육용오리의 생산성, 혈액성상, 장내 미생물 및 면역글로불린 함량에 미치는 영향

전익수(Ik Soo Jeon),강환구(Hwan Ku Kang),김찬호(Chan Ho Kim),황보종(Jong Hwangbo),박성복(Seong Bok Park) 한국가금학회 2016 韓國家禽學會誌 Vol.43 No.3

본 시험은 오리 사료 내 난황항체제제 첨가 시 생산성, 혈액 특성, 장내 미생물 및 면역글로불린에 미치는 영향을 조사하기 위하여 수행하였다. 1일령 오리(Cherry valley) 총 300 수를 공시하여 5처리 3반복, 반복당 20수씩 공시하여 6주간 시험을 실시하였다. 처리구는 항생제를 첨가하지 않은 처리구(NC, negative control), 항생제 처리구(PC, positive control), 난황항체제제 0.1% 첨가구(T1), 난황항체제제 0.5% 첨가구(T2) 그리고 난황항체제제 1.0% 첨가구(T3)로 나누어 실험을 실시하였다. 종료 시 체중은 난황항체제제 첨가구와 항생제첨가구가무항생제처리구보다 유의적으로높았고(P<0.05), 증체량 역시 난황항체제제 첨가구와 항생제 첨가구가 무항생제 처리구에 비해 높게 나타났다(P<0.05). 하지만 전 기간에 대한 사료 섭취량과 사료 요구율은 처리구간에 통계적인 유의차가 나타나지 않았다. 6주간 사양 T실험 후 혈액 생화학 및 혈구 분석 결과, 난황항체제제 0.1, 1.0% 첨가구에서는 total cholesterol 함량이 무항생제 처리구에 비해 다소 감소하는 경향을 보였으나, 통계적인 유의차는 없었다. 또한 AST와 ALT 함량 역시 처리구 간에 유의적인 차이를 보이지 않았다. 오리의 맹장 내 유산균 수는 난황항체제제 0.1와 0.5% 급여 시 다른 처리구에 비해 가장 높았으며(P<0.05), 대장균 수는 난황항체제제 수준이 증가함에 따라 감소하는 경향을 보였으나, 통계적 유의차는 없었다. 또한 혈청 내 면역글로불린 함량에도 처리구간에 유의적인 차이는 나타나지 않았다. 결과적으로 오리 사료 내 난황항체첨가 시 오리의 생산성을 개선시키고, 장내 미생물 균총에 효과적인 것으로 나타났으나, 아직까지 국내에서는 난황항체제제 첨가에 따른 사양 시험과 관련된 연구가 부족하다는 점을 감안할 때 향후 이에 대한 많은 연구가 필요할 것으로 사료된다. This study was conducted to investigate the effect of dietary egg yolk antibody (IgY) powder supplementation on the growth performance, blood component profile, intestinal microflora, and immunoglobulin G in ducks. A total of 300 1-day-old ducks (Cherry Valley) were randomly divided into 5 groups, with 3 replicates of 20 birds. The treatment groups were the negative (NC), positive (PC), egg yolk antibody powder 0.1% (T1), egg yolk antibody powder 0.5% (T2), and egg yolk antibody powder 1.0% (T3) groups. In the growth performance of ducks during the entire experimental period, the IgY groups and positive control group (PC) showed significantly higher (P<0.05) body weights and body weight gains compared to the negative control group (NC). However, no significant differences were observed in the feed intake and feed conversion ratio. The blood component profiles showed that the IgY 0.1 and 1.0% groups decreased in total cholesterol content compared to the NC group. The aspartate aminotransferase (AST) and alanine aminotranferease (ALT) contents were lower in the IgY 1.0% group, but there were no significant differences. Regrading the leukocyte content after feeding IgY, the heterophil: lymphocyte ratio decreased in the IgY groups, especially in the IgY 0.1% group, which had a lower content than the other groups. However, these results showed no significant differences. The Lactobacillus count in the intestines significantly increased (P<0.05) in the IgY 0.1 and 0.5% groups, the level of IgY increased, and the Escherichia coli count decreased. However, no significant difference was observed in the total plate count. The immunoglobulin G content was lower in the IgY groups than in the NC group, and compared with the IgY groups, the IgY 0.5% had a lower content, which was not a significant difference

2회선 1도약 줄넘기 동작에 대한 숙련자와 비숙련자간의 운동역학적 비교 분석

전기수(Jeon, Ki-soo),정익수(Jeong, Ik-Soo),이진(Lee, Jin) 한국체육과학회 2012 한국체육과학회지 Vol.21 No.5

This study examined kinematics variables of body segment at double-under skipping rope by three dimensional image analysis as well as comparative study on ground reaction force to give sports players new information and to provide instructors with basic and scientific material that was needed to teach double-under skipping rope. The subject was six experts and six novices. Experts group took longer time to complete skipping rope than novices group did. And, novices group had larger front and rear inclination at each phase. The author investigated joint of both upper extremity (shoulder joint, elbow joint and wrist joint) and lower extremity (hip joint, knee joint and ankle joint) to investigate body segments exactly, and estimated not only movement displacement of body center but also maximum value of vertical axis (Fz). The study is likely to help promote skipping rope that has been recently popular, and to provide sportsmen and/or players of skipping rope with quantitative data.

미세현미조작된 생쥐배의 발생과 단일할구의 성감별기술에 관한연구

전익수(Ik Soo Jeon),최광수(Kwang Soo Choi) 경북대학교 생명공학연구소 1991 遺傳工學硏究所報 Vol.6 No.1

N/A