• Bulletin of the Korean Chemical Society
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• 제7권2호
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• pp.158-159
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• 1986

• 대한약학회:학술대회논문집
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• 대한약학회 2000년도 NEW STRATEGY FOR DRUG DEVELOPMENT IN POST-GENOMIC ERA(대한약학회)
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• pp.203.2-203.2
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• 2000

• The Journal of Korean Physical Therapy
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• 제13권2호
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• pp.467-475
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• 2001

The purpose of this study was to evaluate changes of static lumbar lordosis by different heel heights in normal adults and patients with herniation of nucleus pulposus(HNP). The lumbar lordosis was examined while standing on barefoot, on heel support with 4cm heel, and with 8cm heel in 10 normal adults and 10patients with HNP. Standing lumbar lateral view was performed by 20 minutes adaptation with corresponding shoe types. The angle of lumbar lordosis was taken with Wiltse and Winter's method(angles between upper margin of 1 st lumbar body and upper margin of 5th lumbar body). The results of this study were as follow: 1. Significant statistical decrease in lumbar lordosis was observed as heel heights were increased from barefoot to 8cm high heel in normal adults(p<0.05). 2. There were no significant differences in lumbar lordosis according to three different heel heights in patients with HNP(p>0.05). 3. In comparison of barefoot, There were statistically significant decrease in HNP patients compared with normal adults in terms of lumbar lordosis(p<0.05).

• 한국인구학
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• 제20권1호
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• pp.65-96
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• 1997

본 연구의 목적은 1980년대 중반 이후부터 지속되고 있는 한국사회 전반에 걸친 출생시 성비불균형현상 가운데 특히 다른 지역에 비해 불균형 정도가 심각한 대구지역의 출생시 성비불균형의 원인을 경험적으로 규명하는 데 있다. 이러한 목적에서 한국에서 태어났지만 사회적,문화적,환경적 여건이 서로 다른 미국으로 이민하여 캘리포이아의 베이지역에 거주하고 있는 한국동포 기혼여성들의 성차별의식, 아들선호도, 태아성감별, 인공유산 등 출생시성비에 영향을 미친다고 알려진 요인들을 대구지역의 기혼여성들과 비교 분석하였다. 본 연구에는 대구지역과 미국 캘리포니아 베이지역에서 거주하는 25-44세 사이의 기혼여성들을 대상으로 조사한 설문조사 내용을 자료로 사용하였다. 연구결과 대구지역의 기혼여성들이 미국 베이지역의 한국동포 기혼여성보다 성차별을 더 많이 느끼고 있으며 아들선호도 역시 높은 것으로 밝혀졌다. 특히 아들을 낳기 위한 노력의 일환으로 임신 전부터 아들을 낳기 위한 시도는 대구지역 기혼여성들이 베이지역 한국동포 기혼여성들보다 2배 정도 더 높으며 태아의 성감별 후 여아로 판명되어 인공중절수술을 실시한 비율은 무려 여섯 배를 능가하는 것으로 밝혀졌다. 출생시 성비불균형에 결정적인 영향을 미치는 변수들을 경험적으로 규명하기하기 위하여 도입한 로지스틱회귀분석 결과에 의하면 대구지역의 경우 성차별 정도, 아들선호도, 성감별 등은 통계적으로 유의미한 영향을 미치는 것으로 나타났으나 베이지역의 경우 연령만이 통계적으로 유의미한 영향을 미치는 것으로 밝혀졌다. 그러므로 본 연구결과를 통하여 우리는 대구지역의 출생시 성비불균형의 가장 큰 원인은 무엇보다도 타지역에 비해 지나치게 강하게 남아있는 유교적 전통에서 비롯되는 아들선호의식에서 출발하고 있음을 알 수 있으며, 이러한 아들선호는 사회계층, 연령, 교육수준의 차이를 막론하고 존재하고 있는 것으로 보인다.

• Clinics in Shoulder and Elbow
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• 제2권1호
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• pp.8-13
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• 1999

The results of the operative treatment of the Grade III acromioclavicular joint injury is defined by the durability of the reduced joint and free of exertional pain. Several surgical techniques have been applied to reduce and stabilize the joints effectively. Resection of clavicular lateral end and subacromial decompression also could be applied to prevent post-operative arthritic change. Biomechanical studies reveals the role of clavicular elevation and rotation to achieve more than 90 degrees of elevation. It also serves as a attachment site of deltoid and trapezius muscle. The stability and mobility of the both acromioclavicular and coracoclavicular joint are important to get full functional recovery. We modified the methods of coracoacromial ligament transfer described by Weaver-Dunn and by Shoji et a!. to pre­vent pullout of the transferred ligament and to get more improved functional results. Main technical point was harvesting full thickness bone block and fix it through the key-hole to reduce pull out angle.

• Journal of Microbiology and Biotechnology
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• 제10권4호
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• pp.482-487
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• 2000

Optimization of submerged culture conditions for the production of exo-biopolymer from Paecilomyces japonica ws studied. Maltose, yeast extract, and potassium phosphate were the most suitable sources of carbon, nitrogen, and inorganic salt, respectively, for both production of the exo-biopolymer and mycelial growth. The optimal culture conditions in a flask culture were pH 5.0, $25^{\circ}C$, and 150 rpm in a medium containing (as in g/l) 30 maltose, 6 yeast extruct, 2 polypeptone, $0.5{\;}K_3HPO_4,{\;}0.2{\;}KH_2PO_4,{\;}0.2{\;}MnSO_4{\cdot}5H_2O,{\;}0.2{\;}MgSO_4{\cdot}7H_2O$. Exo-biopolymer production and mycelial growth in the above suggested medium were significantly increased in a 2.5-1 jar fermentor, where the maximum biopolymer concentration was 8 g/l. The morphological changes of the mycelium in the submerged culture were observed within pH ranges from 4.0 to 9.0; i.e., growth of the filamentous form was optimal at culture pHs of 5.0 and 6.0, whereas pellet was formed at other pHs.

• 한국자동차공학회논문집
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• 제8권6호
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• pp.142-155
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• 2000

A MIMO model reference control scheme incorporating the variable structure theory for a vehicle four wheel steering system(4WS) is proposed and evaluated for a class of continuous-time nonlinear dynamics with known or unknown uncertainties. The scheme employs an neural network to identify the plant systems, where the neural network estimates the nonlinear dynamics of the plant. By the Lyapunov direct method, the algorithm is proven to be globally stable, with tracking errors converging to the neighborhood of zero. The merits of this scheme is that the global system stability is guaranteed and it is not necessary to know the exact structure of the system. With the resulting identification model which contains the neural networks, it does not need higher degrees of freedom vehicle model than 3 degree of freedom model. Th proposed scheme is applied to the active four wheel system and shows the validity is used to investigate vehicle handing performances. In simulation of the J-turn maneuver, the reduction of yaw rate overshoot of a typical mid-size car improved by 30% compared to a two wheel steering system(2WS) case, resulting that the proposed scheme gives faster yaw rate response and smaller side angle than the 2WS case.

• 한국안광학회지
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• 제2권1호
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• pp.103-110
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• 1997

PECVD 방법으로 제작한 비정질 탄소 박막의 전기적 특성을 조사하였다. 기존에 제시되어 있는 전기전도의 두 가지 모형을 측정결과와 비교하였다. 실험결과 상온에서 제작된 시료는 VRH 모델, 고온에서 제작된 시료는 MPH 모델로서 설명이 가능하였다. 이러한 결과로부터 새로운 전기전도에 대한 모델이 확립되어야 할 것으로 생각한다.

• 한국대기환경학회지
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• 제8권3호
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• pp.179-190
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• 1992

This study was carried out to characterize sources of atmospheric total suspended particulates (TSP) in urban and sub--urban areas of metropolitan taegu. The sources were tentatively identified by a multivariate technique, i.e. principal component analysis (PCA), and the source contributions to the atmospheric concentrations of TSP were further estimated by stepwise multiple regression analysis. A total of 5 sources was identified in the urban area of Taegu (soil dust resuspension, fuel combustion, secondary aerosol, traffic related aerosol, and refuge burning), while 4 sources were found to be significant in the sub--urban area as following: fuel combustion/secondary aerosol, soil dust resuspension, traffic related aerosol, and wood/agricultural burning. The largest contributor to the atmospheric TSP appeared to be the soil dust resuspension in both areas. The source apportionment of the extractable organic matter (EOM) was also carried out for the Taegu data. The EOM was determined with respect to the solvent polarity, i.e. cyclohexane (non-polar), dichloromethane (semi--polar), and acetone (polar). In addition, the source profiles for the TSP in Taegu area were estimated using a PCA-based algorithm, and the validity was evaluated tentatively by comparing the data in the literature.

• The Journal of Korean Physical Therapy
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• 제11권1호
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• pp.55-61
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• 1999

The purpose of this study was to compare the moment and power of affected Side and those of unaffected side during gait in hemiplegic patients after stroke. Force plate ana kinetic gait analysis was used. The following is resulted from this study. 1. In the hip joint, moment values had not difference between affected side and unaffected side. Power values had difference between affected and unafected side. 2. In the knee joint, moment values and power values had difference between affected side and unaffected side. 3. In the ankle feint, moment and power values had not, difference between affected side and unaffected side.