분수로 분류부 형상에 따른 유량분배율 특성의 실험적 연구

최한규,백효선,이석환 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A

The divided channel is not often used on the river and when the installation is for the controlling of the flow quantity. The determination of the channel size is not a easy task. Model tests are examined to confirm the variation of distribution rate by the method of the channel installation and the position of the structure and the adjustment of numerical simulation is executed by the comparing of the results. This study is to execute numerical model according to installation of divided channel by using AQUADYN program, the 2nd dimension numerical model, and HEC-RAS program, the 1st dimension numerical model, by the shape of divided channel. Also, it compares with difference by method about each case.

한국 연안 퇴적물에서 ^137Cs, ^90Sr 및 Pu 동위원소의 분포

최석원,진현국,김철수,노정환,김창규,노병환 대한방사선 방어학회 2002 방사선방어학회지 Vol.27 No.2

한국 주변 연안 15개 정점의 퇴적물(0∼20 cm)에서 ^137Cs, ^90Sr, ^239+240Pu 의 농도와 농도비를 조사했다. ^137Cs, ^90Sr, ^238Pu 및^239+240Pu의 평균 방사능 농도는 각각 2.24±0.79 Bq·kg^-1-dry, 0.20±0.04 Bq·kg^-1-dry, 0.009±0.005 Bq·kg^-1-dry 및 0.27±0.17 Bq·kg^-1-dry이다. ^137Cs/^90Sr, ^239+240Pu/^137Cs 및 ^238Pu/229+240Pu의 평균 농도 비와 ^239Pu/240의 평균 원자 비는 각각 11.2±2.9, 0.123±0.053, 0.033±0.01 및 0.218±0.036이다. 퇴적물에서 핵종의 농도 범위와 핵종간의 농도 비는 그 동안 주변국가의 퇴적물에서 조사한 값과 비슷하였다. 퇴적물에서 ^137Cs과 ^239+240Pu의 상관계수는 0.80이다. ^137Cs과 SOM, ^239+240Pu과 점토 함량과의 상관계수는 각각 0.69, 0.67 이다. The concentrations and activity ratios of ^137Cs, ^90Sr, ^238Pu and ^239+240Pu in sediment(0∼20 cm) at 15 coastal stations of Korea were determined. The mean concentrations of ^137Cs, ^90Sr, ^238Pu and ^239+240Pu are 2.24±0.79 Bq·kg^-1-dry, 0.20±0.04 Bq·kg^-1-dry, 0.009±0.005 Bq·kg^-1-dry and 0.27±0.17 Bq·kg^-1-dry, respectively. The mean activity ratios of ^137Cs/^90Sr, ^239+240Pu/^137Cs and ^238Pu/^229+240Pu and atomic ratio of ^240Pu/^239Pu are 11.2±2.9, 0.123±0.053 and 0.033±0.017 and 0.218±0.036, respectively. The concentrations and activity ratios in sediment samples are similar to those reported from neighbouring country in the northern hemisphere. The correlation coefficient of ^137Cs and ^239+240Pu is 0.80. The correlation coefficient of ^137Cs and soil organic matter(SOM), and ^239+240Pu and clay content are 0.69 and 0.67, respectively.

테니스 選手의 體力 要因에 관한 分析 : 男子 高等學校 選手들을 中心으로. focused on high school boys and players

최석민,노성규 江原大學校附設體育科學硏究所 1994 江原大學校附設體育科學硏究所論文集 Vol.- No.18

The purpose of this study is to find out the differenciation of Physical Fitness and physique factors between Elite tennis player and Tennis players of subelite group. 23 players who were made quarter final, 42 player who were not made quarter final in 3 compatitions of National tournament, and 20 untrained high school boys were measured and tested as subjects. Results are following: 1. Elite group has better chest circumference factor than that of general player. 2. Tennis player has better all of fitness factor than those of general student. On the other hand, Elite player has better fitness factors than those of general players, especially in Back strength, Leg strength, and Power.

양측성 관상동정맥루 1예

최용원,오석규,이재훈,이상재,권경희,최은경,김남호,정진원 圓光大學校 醫科學硏究所 2002 圓光醫科學 Vol.17 No.1

저자들은 호흡곤란, 흉부불쾌감, 심계항진 등을 주소로 내원한 환자에서 경흉부 및 경식도 심초음파 검사상 주폐동맥에서 이완기에 전행하는 지속적인 혈류의 흐름을 관찰하고, 관상동맥 조영술을 통해 좌전하행지 중간부위와 우관상동맥 근위부에서 각각 기시하여 공통경로를 이루면서 주폐동맥으로 유입되는 양측성 관상동정맥루를 보이는 드문 1예를 경험하였기에 문헌 고찰과 함께 보고하는 바이다. A coronary arteriovenous fistula is infrequently encountered vascular communication between a coronary artery and a cardiac chamber, a great artery or the vena cava. It is the most common congenital anomaly that can affect coronary perfusion. Bilateral involvement of coronary fistula constitutes an uncommon subgroup of coronary arteriovenous fistulas. A 69 year-old female patient presented with chest discomfort, palpitation, and dyspnea. In the echocardiography, doppler color flow imaging visualized abnormal flow signals with mosaic appearance in the main pulmonary artery during diastolic phase. Coronary angiography revealed arteriovenous fistula arising from the left anterior descending artery and the right coronary artery. Both coronary arteriovenous fistulas drained into the main pulmonary artery. We report a case of bilateral coronary arteriovenous fistula that was confirmed by echocariography and coronary angiography.

치과교정용 초탄성 Nitinol 선재의 피로특성

최석규,박익민,김형일 大韓齒科器材學會 1992 대한치과재료학회지 Vol.19 No.2

Nickel-titanium(NiTi) alloy wires are now widely used in the medical field because of their unique shape memory effect and superelasticity. The purpose of this study is to investigate the effects of mechanical fatigue and thermal cycling fatigue in orthodontics NiTi wire. The fatigue test was performed by three point bending fatigue test(No. of 4000, 8000, 12000, 16000) and tension-compression fatigue test(No. 1000, 2000, 3000, 4000) and thermal cycling fatigue test(No. 500, 1000). The results were as follows : 1. Strength, orthodontic force and transformation temperature(As, ??) were decreased with increasing number of fatigue cycle due to the coarsening of precipitations and increased density of dislocations. 2. Orthodontic force was slightly increased with number of cycle in thermal cycling fatigue due to the cohesion of precipitations and high density of dislocations.

Aspergillus oryzae를 이용한 캡슐형 메주의 품질특성

최재훈,권선화,이상원,남상해,최상도,박석규 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2003 한국식품저장유통학회지 Vol.10 No.3

전통메주의 표면에서 발행하는 야생곰팡이 착생, 유해곰팡이에 대한 mycotoxin 생성 및 메주 표면의 과도한 건조 등을 해결하기 위하여 메주 외층에 Aspergillus oryzae로 만든 쌀 종국(0.3%, w/w)을 혼합시킨 증자 검정콩으로 얇게 코팅한 후, 25℃, 상대습도 80%에서 14일간 발효시킨 캡슐형 메주를 개발하였다. 캡슐형 메주의 표면에서 야생곰팡이의 오염은 발견되지 않았으나, 대조구 메주는 12일 이후에 푸른곰팡이가 많이 관찰되었다. 메주의 수분 함량은 평균 32.7%로서 34.7~29.4%의 범위를 나타내었다. 적정산도는 캡슐형 메주가 대조구 메주보다 높게 나타났으며, 대두 캡슐형 메주와 검정콩 캡슐형 메주는 비슷하게 나타났다. 유리당의 함량은 검정콩 캡슐형 메주가 123.98㎎%로 대조구 메주 15.02㎎%와 대두 캡슐형 메주 59.85㎎%보다 각각 10배, 2.1배, 높게 나타났다. 아미노산성 질소의 함량은 대조구 메주에서 147.00㎎%였으며, 검정콩 캡슐형 메주는 255.50㎎%로서 대두 캡슐형 메주 187.25㎎%보다 약 1.37배 높은 함량을 나타내었다. 총 유기산의 함량은 캡슐형 메주(대두 119.98㎎%, 검정콩 95.94㎎%)가 대조두 메주(26.44㎎%)보다 함량이 높게 나타났으며, 캡슐화에 따라 lactic acid와 malic acid 가 가장 큰 변화를 나타내었다. 색차계 색도는 검정콩 캡슐형 메주가 대두 캡슐형 메주보다 명도값(L)이 크게 나타났으며 지방산 조성은 메주의 종류에 따라 큰 차이를 나타내지 않았다. 총 유리 아미노산의 함량은 검정콩 캡슐형 메주(1039.70㎎%)가 대두 캡슐형 메주 (556.07㎎%)와 대조구 메주(236.45㎎%) 비하여 각각 2.4배, 4.4배 높았다. In order to improve some problems such as contamination of undersirable mold, mycotoxin production and excessive drying on the surface of traditional meju, we developed a capsule type-meju(CM) coated with steamed black bean and Aspergillus oryzae - rice koji(0.3%, w/w) mixture to surface of traditional meju and fermented at 25℃ for 14 days under 80% relative hunmidity. Contamination of undersirable mold on the surface of CM was not detected within 2 weeks and some genus Penicillium molds on control meju without koji were found naturally after 12 days of fermentation. The moisture content of meju was showed to be in the range of 34.7 - 29.4% being 32.7(w/w) of mean value. Titratable acidities in CMs prepared with black bean(BCM) and soybean(SCM) were much higher than that in control meju, and BCM was similar to SCM. Free sugar content in BCM(123.98 ㎎%) was 10 times and 2.1 times higher than that in control meju(15.02 ㎎%) and SCM(59.85㎎%), respectively. Amino type nitrogen content in control meju was 147.00 ㎎% and its content in BCM(255.50㎎%) was 1.37 times higher than that in SCM(187.25 mg%). Total organic acid content in BCM(95.98㎎%) and SCM(119.98㎎%) were much higher than that in control meju(26.44 ㎎%), and then latic and malic acid contents were markedly changed according to capsulation of meju. Lightness value(l) of Hunter color index was much higher in BCM than in SCM. Fatty acid composition of CM was not different as compared to control meju. Total free amino acid content in BCM(1039.70 ㎎%) was 4.4 times and 2.4 times higher than that in control meju(236.45 ㎎%) and SCM(556.07 ㎎%), respectively.

고성능 콘크리트 구조의 시간의존적 거동 예측

이재석, 최규천, 박영하 충북대학교 건설기술연구소 2008 충북대학교 건설기술연구소 논문집 Vol.27 No.1

The use of high-performance concrete with low water-cement ratio has been continuously increasing. Time-dependent behaviors of normal and high-performance concrete due to the shrinkage deformations, such as drying shrinkage and autogenous shrinkage, are different. However, time-dependent characteristics of the high-performance concrete are not considered in the design of the domestic concrete structures so far. In this paper, the time-dependent behavior of high-performance concrete structures using the CEB-FIP MC 90 model which is adopted in domestic code and the fib bulletin model can predict the time-dependent behavior of normal as well as high-performance concrete are analyzed. The analysis result of the column and PSC cable-stayed bridge using CEB-FIP MC 90 model and the fib bulletin model, respectively, show that the differences of time-dependent behavior are not negligible.

증편의 저장 중 조직 특성 변화

張奎燮,李貞植,崔錫鉉,朴榮德 충남대학교 농업과학연구소 1991 농업과학연구 Vol.18 No.2

This study was carried out to investigate the storage conditions and methods required for commercializaion of Jeung-Pyon. The storage characteristics of Jeung-Pyon were examined with Universal Testing Machine (UTM. Instron model 1000) for textural properties during storage of tinder the conditions such as sealing, nonsealing, and temperatures. The differences in storage characteristics on the different varieties and years of rices were not shown. When the Jeung-Pyon was lost it's quality as a commercial product, the measured value of UTM was increased as hardness 0.74㎏ to 1.0㎏, gumminess 0.23㎏ to 0.59㎏, chewiness 6㎏.mm to 18㎏.mm, but decreased in adhesiveness 0.65㎏.mm to 0.40㎏.mm, cohesiveness 0.61 to 0.34, springiness 41㎜ to 32㎜. The nonsealed Jeung-Pyon was lost it's quality for storing at room temperature because of the case-hardening after 2 days. In the case of sealed Jeung-Pyon, the case-hardening phenomena by the evaporation of moisture was not occured, therefore it was a significant factor for an extension in sealed Jeung-Pyon. The shelf-life of sealed Jeung-Pyon was 20 days and 5 days respectively during storage at -20℃ and 20℃ The sealed Jeung-Pyon stored at 5℃ was lost it's quality, in consideration of cold chain this temperature was suitable for retrogradation of starch. The Jeung-Pyon sealed with air and mosture proof packaging material stored at the accelerated condition as 92% R.H. and 35℃ lost it's quality within two or three days.

전립선암의 종양지표로서 전립선특이항원의 진단적 가치

이남규,박영호,최석형 순천향대학교 1994 논문집 Vol.17 No.4

Prostatic specipic antigen(PSA), neutral serine protease secreted exclusively by prostatic epithelial cell, has a number of application in the diagnosis of men with prostatic carcinoma. It is widely recognized that elevated PSA correlates with the presence of carcinoma. We measured serum PSA levels in normal controls, patients with benign prostate hyperplasia symptoms because to evaluate diagnostic value of PSA as a tumor marker for prostatic cancer. Mean values of serum PSA in normal controls and patients with BPH symptoms were 2.83±4.02, 23.48±62.17ng/ml, respectively(p<0.01). We conclude that serum PSA offers simple and objective tumor maker but interpretation of significance of a specific level measured is inexact.

單크론 抗體를 利用한 結核菌 베타抗原의 精製와 結核性 髓膜炎의 診斷的 應用에 關한 硏究

明錫俊,白太鉉,朴鼎圭,崔大卿 충남대학교 의과대학 지역사회의학연구소 1988 충남의대잡지 Vol.15 No.1

5F3F2 hyridoma cells produce monoclonal antibody which is reactive with a single epitope on the molecule of beta antigen and shows a specificity restricted to Mycobacterium tuberculosis complex. Ascitic fluids were produced by an intraperitoneal injection of 5.0 x 10^6 hybridoma cells into Balb/c mice previously sensitized with pristane. The reactive pattern of ascitic fluid with reference beta antigen was analyzed by Western blot. Purification of 5F3F2 monoclonal antibody from ascitic fluid was performed by a single step method using hydroxylapatite chromatography. Beta antigen from the cell extract of Mycobacterium tuberculosis was purified by affinity chromatography with 5F3F2 monoclonal antibody and checked its molecular characterization by SDSPAGE. Finally, affinity purified beta antigen was applied for its potential diagnostic utility in dection of IgG antibody in the cerebrospinal fluids of 12 patients with tuberculous meningitis and 24 non-tuberculous patients by ELISA at the CSF dilution of 1 : 5. The results were summarized as follows: 1. Ascitic 5F3F2 monoclonal antibody was reacted with a major band of 83-kDa and a minor band of l l0-kDa molecule of reference beta antigen on Western blot. 2. 5F3F2 monoclonal antibody was purified directly from ascitic fluid by a single step purification of hydroxylapatite chromatography. 3. Affinity purified beta antigen showed two distinct bands of 83-kDa and 52-kDa molecules on SDS-PAGE. 4. The mean ELISA values of IgG antibody activities to affinity purified beta antigen in CSF of 12 patients with tuberculous meningitis and 24 controls were 0.866±0.607 and 0.058±0.040, respectively. The specificity and sensitivity were 96.5% and 93.1%. These results suggest that the major molecule of beta antigen is 83-kDa and the affinity purified beta antigen is useful for the diagnosis of tuberculous meningitis.