광주지방 부유분진의 농도변화

柳贊洙,金銀貞 조선대학교 기초과학연구소 1996 自然科學硏究 Vol.19 No.1

This study analyzes the diurnal, seasonal and annual variations of TSP in Kwangju and investigates the relation of TSP to air temperature and to RH. The data used in this study are observed from Meteorological Office and Environmental Bureau in Kwangju and the period of observation was from Jan. 1, 1991 to Dec. 31, 1993. The diurnal variation of TSP shows two vibration curves and the diurnal means are 67.9㎍/㎥. The time the diurnal maximum value is shown is 10:00 A.M. and that diurnal minimum value is shown is 06:00 A.M. The diurnal range is 55.9㎍/㎥. In this diurnal variation of TSP by season, the concentration is high in winter, spring, autumn and summer in order. The annual variation of TSP shows one vibration curve, the maximum value in April and the minimum one in August. The annual range is 43.6㎍/㎥. As a result of the regression analysis for examining the relations of TSP to air temperature and to RH, a regular polynomial regression expression is made on time series. TSP has a great significance in the diurnal variation with air temperature, but it has a little significance in the annual variation. TSP and RH have a significance in the diurnal and annual variation and show the inverse propertion with them.

마이크로그로브 형태에 따른 평활근 세포 운동 측정

유소영,박찬영,정석,김동익,이병붕,허세호,한동철,장준근 대한혈관외과학회 2002 Vascular Specialist International Vol.18 No.2

Purpose: The spreading, orientation, and chemotaxis the gradient of a chemoattractant of smooth muscle cells (SMCs) were studied on the micro-grooved substrata by the light, fluorescence and scanning electron microscopy. Method: Vertical-walled grooves were produced in silicon wafers by the micromachining technique. All grooves were 4~20㎛ deep and 10~80㎛ wide, SMCs were cultured on each microgroove and examined under stereo-microscope. Result: Cell clusters were markedly oriented by all the grooved substrata examined. Tim-lapse images acquired from CCD (Charge Coupled Device) showed that the grooves directed the migration of SMCs. There was no prominent difference in the migration speed of SMCs according to the grooves. All the cytoskeletal fibers were reoragnized in the same direction with grooves. Especially the alignments of microtubule and intermediate filaments were distinguished in the SMCs on the micro grooves. Conclusion: These results could be applied to the analysis of vascular restenosis and the development of artificial blood vessels.

압박 고 나사로 치료한 대퇴골 전자부 골절 : 고정 실패의 인자에 대한 분석 Analysis of Factors associated with Failure of Fixation

유찬훈,김홍태,변영수,남준모,조영호,문성건 대한골절학회 2002 대한골절학회지 Vol.15 No.4

목 적 : 압박 고 나사로 치료한 대퇴골 전자부 골절의 고정 실패에 영향을 미치는 요소에 대하여 분석하고자 하였다. 대상 및 방법 : 1995년 5월부터 2000년 7월까지 대퇴골 전자부 골절을 압박 고 나사를 이용하여 치료하고 1년 이상 추시가 가능했던 97예를 대상으로 하였다. 골절의 분류는 Jensen 분류법을, 골다공증의 정도는 Singh 지수를 이용하였다. 술후 방사선 검사에서 경체각, 정복 상태, 지연 나사의 대퇴골 두 내 위치, tip-apex distance(TAD) 및 지연 나사의 활강 거리를 측정하였고 고정 실패에 미치는 영향을 통계학적으로 분석하였다. 결 과 : 97예 중 17예(17%)에서 고정 실패가 발생하였고 그 중 지연 나사의 과도한 활강으로인한 경우가 15례(15.4%), 골두 천공 1얘, 10도 이상의 외반 변형 1예였다. 고정 실패의 발생과 80세 이상의 고령, 불안정성 골절, telescoping 정복, 원위 골편의 내측 혹은 전방 전위, 대퇴골 두 내 지연 나사의 위치와 밀접한 관계가 있었다. 결 론 : 압박 고 나사를 이용한 대퇴골 전자부 골절의 치료에서 고정 실패를 방지하기 위해서는 정확한 정복이 필요하고 대퇴골 두 내에서 지연 나사의 전방 위치를 피하는 것이 좋을 것으로 사료된다. Purpose : This study was performed to analyze the significant factors that may affect failure of fixation in trochanteric fractures of the femur treated with the compression hip screw. Materials and Methods : From May 1995 to July 2000, the authors analyzed 97 cases of trochanteric fracture of the femur treated with the compression hip screw and followed more than one year. We classified the fracture type by Jensen's method. We used Singh index for the degree of osteroporosis. In the post-operative radiograph, we checked neck-shaft angle, state of reduction, position of the lag screw within the femoral head, tip-apex distance, and sliding distance of the lag screw. The relationship between these factors and failure of fixation was statistically analyzed. Results : There were 17 cases(17.5%) of failure of fixation ; 15 cases(15.4%) of excessive sliding of the lag screw, 1 case (1%) of cutting out of the lag screw, and 1 case (1%) of valgus malunion. There were significant relationship between failure of fixation and old age over 80 , unstable fracture, telescoping reduction, anterior or medial displacement of the distal fragment, and anterior placement of the lag screw within the femoral head. Conclusion : Accurate reduction and avoidance of the placement of the lag screw in the anterior part of the femoral head were important factors to prevent failure of fixation in trochanteric fractures of the femur treated with the compression hip screw.

산란계 사료첨가제로서 크릴분말의 효과

김종덕,장재익,유문일,정흥우,권찬호,오두식,김창현 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.1

본 시험은 크릴 분말의 사료적 특성을 조사하고, 산란계 사료에 첨가하였을 때 계란의 생산성과 품질을 비교하기 위하여 수해하였다. 크릴 분말을 산란계 사료에 0, 1 및 2% 수준으로 첨가하여 216수에 6주간 사양시험을 실시하였다. 크릴분말의 일반성분은 수분 8.25%, 조단백질 50.52%, 조지방 16.67%, 조회분 15.72%로 단백질과 지방이 높은 동물성 사료원료였다. 그리고 무기질(15.72%), astaxanthin (10ppm) 및 콜레스테롤 함량 (780ppm) 또한 많았다. 산란율, 연파란율, 일일사료섭취량 및 난중은 처리간에 유의적인 차이가 없었다. 황고 및 난황색도는 크릴의 첨가수준이 높을수록 유의적으로 높아 산란계의 난질을 향상시키는 첨가제로서의 가능성을 보였다. 이상의 결과를 볼 때 크릴 분말은 단백질과 지방이 높은 동물성 사료이며, 산란계에서 천연착색제로의 가능성을 보였다. This experiment was conducted to evaluate the chemical composition of Antarctic Krill(Euphausia superba Dana) meal as feed, and to investigate the effect of its supplementation on productivity and egg quality of laying hen. A total of 216 layers at the age 43 weeks in commercial cage were fed for 6 weeks with 3 different diets containing 0, 1, and 2% Krill meal (KM). The chemical composition of KM was consisted of moisture 8.25%, crude protein 50.52%, crude fat 16.67%, curde ash 15.72%, indicating that KM contains large amount of protein and fat. Krill meal also contains large amounts of mineral(15.72%), astaxanthin(10ppm) and cholesterol(780ppm). No differences were found in egg production, broken and soft eggs, and feed intake among treatments. Dietary supplementation of KM resulted in increased egg yolk height(6.1㎜) and yolk color (2) compared with those of control, suggesting that KM can be used as a feed additive for yolk quality improvement. According to the results of this study, Krill meal can be supplemented in laying hen diets as protein and fat sources, and natural coloring pigment.

관상동맥 질환자를 위한 cycle ergometer exercise와 treadmill exercise의 적정 운동강도

유승희,장완성,박찬호,김승환,노호성 경희대학교 체육과학연구소 2000 體育學論文集 Vol.28 No.-

The purpose of this study was to determine heart rate (HR), ratings of perceived exertion (RPE) and oxygen uptake (Vo2) at the anaerobic threshold (AT) in two different exercise modalities, cycle ergometer and treadmil exercise (running). Subjects were 13 women patients with coronary heart disease. All sub-maximal and maximal Vo2 values but Vo2 at the AT for women were significantly higher in treadmill exercise than cycle ergometer. Submaximal and maximal HR values were not significantly different between the two exercise modalities. However, mean RPE values at the AT were significantly higher in cycle ergometer than treadmill exercise. We suggest that appropriate HR values in exercise training should be the same in cycling and treadmill exercise. while RPE values should be 1 or 2 higher in cycling than running.

8주간의 수영훈련이 호흡순환기능에 미치는 영향

유승희,김복현,심성섭,박찬호 경희대학교 체육과학연구소 1995 體育學論文集 Vol.23 No.-

In this study, ten students of department of physical education in K unversity participated in 8-week-swimming training. With the figures of respiration and circulation shown before the training and after the trainging, the conclusion came out as follows after comparison and analysis of the changes in the stability and the maximum figures. 1)The respiration of one time ventilation(TVE, ㎖) Looking info the quantity of one lime ventilation In the rest, it came out 946.47㎖, meanwhile, after the training, it fell down to 878.17㎖, which is lower by 68.39㎖ and the the percentage of decrease is 7.78%. But as for the maximum figures, in came out 3117.70㎖, while after the training, it was 3219.10㎖ and that's higher by 101.4㎖ and the percentage of increase is 3.15%. 2)The oxygen uptake(VO2, ㎖/min) In the rest, the quantity of Q2 taken into the lung was 540.83m7/min before the training, but after the trainging, it showed 405.63㎖/min, which was lower by 135.20㎖/min, and the percentage of decrease is 33.33%. But as for the maximum figures, it was 3701.60㎖/min before the training, while after the training, it was 3885.30㎖/min, which Is higher by 183.7㎖/min and the percentage of· increase is 4.73%. 3)The rate of gas exchange(R)In the rest, the rate of gas exchange showed no big difference between before (1.03) and after (1.03) the training. But in the maximum figures, it was 1.42 before the training, while it was 1.45, which was higher by 0.03 and the rate of increase is 2.07%. 4)The oxygen uptake per weight(VO2/W, ㎖/kg/min)In the rest, the quantity of O2 per weight was 8.05㎖/kg/min before the training. But after the training, it was 5.99㎖/kg/min, which was lower by 2.06㎖/kg/min, and the rate of decrease is 34.39%. But in the maximum figures, it was 53.64㎖/kg/min before the trainging, while it was 58.80㎖/kg/min, which was higher by 5.16 and the rate of increase is 8.78%. 5)Heart rate(HR, beats/min)Looking Into the heart rate in the rest, it was 74.24beats/min before the training, but after the training, it was 70.84beats/min, which was lower by 3.4beats/min and the rate of decrease is 4.79%. But in the maximum figures, before the training, it was 187.25beats/min while it came out 194.69beats/min, which was higher by 7.44beats/min and the rate increase was 3.82%. 6)O2 pluse(VO2/HR, ㎖/beats)In the rest figures came out 6.10 before the training, while after the training, it was 5.72㎖/beats which was lower by 0.38 and the rate of decrease was 6.64%. But in the maximum figures, it was 19.78㎖/beats before the training, but after the training, while after the training, it was 22.54me/beats, which was higher by 2.76 and rate of increase is 12.24%.

요추부 유합수술 후 가동인접분절의 후기변화

김홍태,강도원,유찬훈,정재호,장세앙 대한척추외과학회 1996 대한척추외과학회지 Vol.3 No.1

The spinal fusion in a lumbar region may influence biomechanically in the remained mobile segment to take over the lost motions Therefore the stress concentration on the adjacent segments may accelerate the degenerative changes, and then various late changes could occur. The aim of this study was to evaluate the late changes occuring in the adjacent segments to lumbar fusions. A retrospective review of radiographs and medical records was undertaken for 67 consecutive patients who had undergone various fusions in the lumbar region for various pathologic conditions. Included in this study were the patients who had performed active daily livings without any significant pain or disability after fusion and followed for a minimum of five years(up to 18 years with a mean of 8.3 years). The results of this study were as follows : The instability, disc narrowing, spinal stenosis, vertebral slipping, or isthmic defect were found in the adjacent segments to fusions in the patients who were followed longer, in L4-5 segment and above segment of fusion, and in the adjacent segments where a degenerative changes existed before surgery and where the angular motion increased considerably in a few years after fusion. The symptoms of these patients were responded well with conservative theraphy and no patient needed any surgical theraphy during these follow-up periods.

洪水量 추정에 관한 硏究 (Ⅰ) : 臨河(乙)地域을 中心으로 with reference to the Im-Ha region

金熙鍾,全裕燦 동아대학교 환경문제연구소 1986 硏究報告 Vol.9 No.1

The objective of this paper is a study on the presumption of the flood discharge in the Nak-Dong rivers. In this study, the flood discharge was compared observed values with calculated values of Nakayasu's method, storage function method using the computer, and its study will be contributed much to the flood forecast at the Im-Ha region in the Nak-Dong revers

최대운동부하시 단련자와 비단련자의 호흡순환기능 비교연구

유승희,김복현,송종국,윤형기,박찬호 경희대학교 체육과학연구소 1996 體育學論文集 Vol.24 No.-

We studied the differences of cardiorespiratory function of the untrained group and the trained group. The findings are following: 1.In ventilation, trained group was higher than untrained group. In addition, there was significant difference(p〈.001) at 60% and 85% exercise levels and All-out time. 2.In respiratory rate, tranined group was higher than untrained group. In addition, there was significant difference(p〈.01)at 85% exercise level and All-out time. 3.In respiratory gas exchange, trained group was lower than untrained group. In addition, there was significant difference(p〈.01) at All-out time. 4.In oxygen intake per weight, trained group was higher than untrained group. In addition, there was significant difference(p〈.001) at 40%, 60%, and 85% excercise levels and All-out time. 5.In heart rate, trained group was lower than untrained group. In addition, there was remarkable difference(p〈.0901) at rest.

朝鮮大學校 天文臺 設置를 위한 基礎資料 調査와 YZ Cassiopeiae의 光電觀測

金永成,柳贊洙 조선대학교 기초과학연구소 1988 自然科學硏究 Vol.11 No.1

This paper indicate the best sites for setting up an Chosun univesity observatory by studing topography, geology, and the climatological elements. In the survey of the topography. Traffic condition, photographical condition, elevation surveys are examined. In the survey of the geology. Bed rocks and its developments are examined. In the survey of the climatology. Observational records of the climatological standard stations and auxiliary stations in the studied areas are examined. Is survey elements are mean air temperature, precipitation, maximum wind speed, humidity, duration of sunshine, foggy days, cloudy days clear days, etc. In the results. Songhak mountain Kwangsan-gu, Kwangju is more suitable. The eclipsing nature of YZ Cassiopeiae(HD 4161, mag. 5.59, Sp.A2, α= OO^h 39^m, δ=+74˚ 26' 1900) was discovered by Stebbins(1924). A total of 1628 Photoelectric observation(814-yellow 814-blue) is made from 1983 to 1987, at Yonsei university observatory. Almost complete light curve which coincide to previous authors are grain. Astrophysical computing data of YZ Cas are coincide with another paper.