입시제도의 변화 : 누가 서울대학교에 들어오는가?

김광억,김대일,서이종,이창용 서울대학교 사회과학연구원 2003 한국사회과학 Vol.25 No.1-2

본 연구는 지난 30년간 서울대학교 사회과학대학 신입생들의 학생기록카드로부터 입학생의 출신지역, 부모학력 및 직업에 대한 Database를 구축하고, 이를 바탕으로 출신 지역별, 부모 학력 및 직업별 입학률 및 대학성적을 비교 분석하였다 본 자료의 구축과 연구는 그간 실증근거의 부족으로 인해 탁상공론에 그쳐왔던 교육성과 및 정책에 대한 논의에 대해 과학적 실증근거의 중요성을 강조하려는 목적으로 수행되었다. 본 연구에 의하면 부모 학력 및 직업에 따른 자녀의 입학률 격차가 확대되고 있으며 서울의 강남8학군 부유층 자녀의 입학률 프리미엄도 뚜렷하게 추정된다. 이는 그간 평준화 정책을 통해 교육기회의 평등을 추구하였음에도 불구하고 소득에 따른 자녀 입학률 격차가 확대되어 가고 있음을 시사한다 또한 이는 공교육 부실에 따라 사교육의 비중이 증가하고 있음을 반영하는 결과로서 이러한 문제를 개선하기 위해서는 평준화 정책의 수정 등 공교육 정상화를 위한 다방면의 노력이 요구되는 것으로 평가된다. This study analyses the admission rates and academic performance of the students in the Social Science Division of Seoul National University by their regional snd parental characteristics based on the database constructed from the past 30-year records of the students personal cards. Both the construction of the database and its analysis are motivated by the lack of the empirical evidence on educational performance in Korea, which has so far failed to lead various arguments on educational policies to any consensus. The results indicate that the differentials in admission rates by the parents'education and jobs have been widening and also that the admission rate has remained high among those residing in the relatively affluent Gangnam 8th school zone of Seoul. These imply that the differential by the parents'income has been widening despite the equalization policy in high school education that is supposed to have offered equal educational opportunities to the rich and the poor. The widening income-differential in admission rates appears to reflect that expensive private tutoring has become increasingly more important given the deterioration of public education. As a consequence, various efforts appear due, including the revision of the equalization policy, in order to substantially improve the performance of public education in Korea.

코어방적사직물의 구김회복거동에 관한 연구

성수광,권오경,김효대 한국의류학회 1989 한국의류학회지 Vol.13 No.3

In this paper, the fabric specimen undergoes repeated laundering under given condition. After this cyclic laundering was applied, the crease recoveries of the specimen were measured using shirley crease revovery tester in order to evaluate the effect of factors at given condition during crease deformation. 5 samples of grey plain cloth were desized, alkali-scoured, bleached, whased with water, and air-dried. All tests were made on samples preconditioned to 65% RH and 20℃. The experimental results were analysed statistically to relate crease recoveries and the properties of smaples, recovery periods (time) of crease. Furthermore, the crease recoveries of core-spun yarn woven fabrics were discussed in comparison with those values for 100% combed cotton yarn woven fabric and 65% polyester 35% carded cotton blended yarn woven fabric. The results obtained are as follows; 1. Regardless of materials, remarkable decrease are observed in crease recoveries about 1-5 cycles of the repeated laundering, but slack decrease are observed in crease recoveries after 5 cycle of the re-peated laundering. 2. Crease recoveries (a) of core-spun yarn woven fabrics are relate to recovery periods (t) of crease as follows; loga=0.01415 logt+2.1168 (r^2=0.94) 3. Core-spun yarn woven fabrics were superior to 100% combed cotton yarn woven fabrics and 65% polyester 35% carded cotton blended yarn woven fabric in crease recoveries. 4. Crease recoveries (a) of core-spun yarn woven fabrics are relate to cover factor (CF), thickness (T) at pressure 0.5gf/㎠, weight (W) as follows; loga=-0.3482 logCF-0.4924 logT-0.4727 W+2.4243 (r^2=0.88) 5. Crease recoveries (a) of core-spun yarn woven fabrics are relate to 2HB/B, 2HB/W, ^3√B/W, WC/T which are concerning to formation of weared clothes and bending tran formation behavior as follows; log a=0.0091 2HB/B+0.4667 2HB/W+0.0185 ^3√B/W-+0.0114 WC/T+1.8433 (r^2=0.86)

Al₂O₃ 변화량이 Na₂O-CaO-SiO₂계 유리의 물성에 미치는 영향에 관한 연구

장광남,임대영,박원규,김종옥 培材大學校 1997 培材論叢 Vol.2 No.-

In this study the effect of Al₂O₃addition in Po-Chun Feldspar on the properties of Na₂O-CaO-SiO₂system glass is investigated to improve chemical durability and, at the same time, to minimize the change of glass conditions such as viscosity and working range. The experimental results are as follows. In case of adding Po-Chun Feldspar, the higher glass transition temperature and Softening point rise are obtained in more Al₂O₃addition, while thermal expansion coefficient α(30℃∼430℃) reduces. It is also shown that alkali extraction content is increasing as the Al₂O₃component increases. As the silica source (resource of SiO₂) is replaced by Po-Chun Feldspar, glass transition and softening point slightly increase, and α(30℃∼430℃) value increases, but alkali extraction content reduced.

Wharton씨 도관내에 발생한 타석증에 관한 증례보고

이경옥,이광희,김대업 大韓小兒齒科學會 1997 大韓小兒齒科學會誌 Vol.24 No.3

Sialolithiasis is the formation of calcific concretions within the ductal system of major or minor salivary glands. The exact nature of sialolith evolution is not known. It may occur at any age but, it is most common in middle-aged adult and rare in childhood. In this paper, a case of sialolithiasis just beneath the mucosa in the anterior portion of the Wharton's duct observed in a 5-year old boy. It was approximately 2.5 ×5 mm in size and has no clinical symptoms. Under local anesthesia, it was removed by dilatation of orifice of the duct and pressure on the floor of oral cavity by finger.

천식치료를 위한 시럽제의 장기복용이 타액내 환원효소활성과 유치우식에 끼친 영향

이경옥,김대업,이광희 大韓小兒齒科學會 1998 大韓小兒齒科學會誌 Vol.25 No.2

The purpose of this study was to investigate the effects of syrup medication for asthmatic children on the salivary invertase activity and caries experience. 26 ashmatic children for the study group and 30 healthy children for the control group were selected, respectively. Caries experience was examined and salivary reductase activity was tested. The parents of asthmatic children were asked to fill in the questionaire about syrup intake period and home dental behavior, and the parents of healthy children were asked to fill in the same questionaire without syrup intake period. The results were as follows: 1. The ds index of asthmatic children were higher than that of healthy children(P<0.05). 2. there was significant difference in dt index between the intake period of 'shorter than 10 months' and 'longer than 20 months'. the ds, dft and dfs indices had a tendency to increase as the intake period increased. 3. the salivary reductase activity had a tendency to increase as the intake period of syrup increased.

7-O-(alpha-L-람노피라노실) 또는 7-O-(4''-아미노-alpha-L-람노피라노실)-다우노마이시논과 -아드리아마이시논 유도체의 합성과 항암활성

옥광대(Kwang Dae Ok),박정배(Jeong Bae Park),김문성(Moon Sung Kim),정동윤(Dong Yoon Jung),안상용(Sang Yong An),배중석(Chung Seok Bae),양중익(Junn Ick Yang) 대한약학회 1996 약학회지 Vol.40 No.1

Daunirubicin and doxorubicin analogues (5,7,8,9,) in which the natural amino sugar, daunosamine, is replaced by rhamnopyranosyl or 4''-amino rhamnopyranosyl residues have been prepared. The in vitro cytotoxicity of compound 5 or 7 was similar to that of doxorubicin for P388 murine leukemic cell line. But compound 8 or 9 was less cytotoxic than doxorubicin. When administered intravenously on day 1, compound 9 showed antitumor activity comparable to that of doxorubicin against ip-inoculated L1210 murine leukemia and found to be less toxic than doxorubicin. But the in vivo antitumor activity of compound 7 or 8 was inferior to that of doxorubicin.

Hemistepsin A inhibits T0901317-induced lipogenesis in the liver

( Jae Kwang Kim ),( Il Je Cho ),( Eun Ok Kim ),( Dae Geon Lee ),( Dae Hwa Jung ),( Sung Hwan Ki ),( Sae Kwang Ku ),( Sang Chan Kim ) 생화학분자생물학회 2021 BMB Reports Vol.54 No.2

Hemistepsin A (HsA) is a guaianolide sesquiterpene lactone that inhibits hepatitis and liver fibrosis. We evaluated the effects of HsA on liver X receptor (LXR)-mediated hepatic lipogenesis in vitro and in vivo. Up to 10 μM, HsA did not affect the viability of HepG2 and Huh7 cells. Pretreatment with 5-10 μM HsA significantly decreased the luciferase activity of the LXR response element, which was transactivated by T0901317, GW 3965, and LXRα/retinoid X receptor α overexpression. In addition, it significantly inhibited the mRNA expression of LXRα in HepG2 and Huh7 cells. It also suppressed the expression of sterol regulatory element-binding protein-1c and lipogenic genes and reduced the triglyceride accumulation triggered by T0901317. Intraperitoneal injection of HsA (5 and 10 mg/kg) in mice significantly alleviated the T0901317-mediated increases in hepatocyte diameter and the percentage of regions in hepatic parenchyma occupied by lipid droplets. Furthermore, HsA significantly attenuated hepatic triglyceride accumulation by restoring the impaired expression of LXRα-dependent lipogenic genes caused by T0901317. Therefore, based on its inhibition of the LXRα-dependent signaling pathway, HsA has prophylactic potential for steatosis. [BMB Reports 2021; 54(2): 106-111]

저수준 측정에서의 동측 케이블 노이즈 평가

이광대(Lee Kwang-dae),오응세(Oh Eung-se),양승옥(Yang Seung-ok),류우호(Rhu Woo-ho),신대근(Shin Dae-geun) 대한전기학회 2009 정보 및 제어 심포지엄 논문집 Vol.2009 No.10

원자력발전소에서는 원자로 출력의 정확한 제어와 공공의 안전을 위한 긴급 보호동작을 위하여 운전 중에는 출력 준위를 상시 측정하고 있다. 출력 측정은 준위에 따라 전리함 계측기 등 다양한 종류의 계측기를 사용한다. 원자로로부터 발생하는 방사선으로부터 유발되는 미세 전하는 증폭을 거쳐서 전류와 전압 신호로 만들어진다. 원자로 출력 측정 전류는 출력에 따라 다르지만 0~100% 출력범위에서 10?¹¹~10?⁴ 정도이다. 원자로에 밀접하게 부착되어있는 현장 계측기로부터 측정한 미세 신호는 100m 이상의 동축케이블을 거쳐서 신호증폭기로 입력된다. 신호가 매우 작으므로 작은 신호선의 노이즈에도 원자로 제어와 보호 동작에 영향을 미친다. 본 논문에서는 국내 원전에서의 동축케이블 노이즈 경험을 바탕으로, 동축케이블에 물리적인 굽힘이나 압력을 인가할 경우 노이즈가 유발된다는 것을 시험으로 입증하고 그 크기를 측정, 평가한 내용을 정리하였다.

Enhancing Effects of Indole-3carbinol on Hepatocarcinogenesis and Thyroid Tumorigenesis in a Rat Multi-Organ Carcinogenesis Model

(Dae Joong Kim),(Beom Seok Han),(Byeong Woo Ahn),(Chang Ok Kim),(Kwang Sik Choi) 한국응용약물학회 1994 학술대회 Vol.1994 No.1

증례 : 소화기 ; Lactococcus Lactis에 의한 간농양 1예

천광진 ( Kwang Jin Chun ),이동규 ( Dong Gyu Lee ),박명옥 ( Myoung Ok Park ),강창돈 ( Chang Don Kang ),이성준 ( Sung Joon Lee ),최대희 ( Dae Hee Choi ) 대한내과학회 2009 대한내과학회지 Vol.77 No.5S

이전에는 건강한 성인에서 병원균으로 인식되지 않던 Lactococcus가 최근들어 국외에서 간농양, 소뇌농양, 괴사성 폐렴 및 관절염 등을 일으켰다고 보고되었다. 하지만 아직까지 국내에서는 이 균으로 인한 간농양이 보고되지 않았다. 본 저자들은 Lactococcus lactis로 인한 간농양 1예를 경험하였기에 보고하는 바이다. Lactococcus lactis, a facultative anaerobic, Gram-positive bacterium, is not considered a major pathogen in humans, especially in immunocompetent hosts. However, this species can, on rare occasions, cause cerebellar abscesses, endocarditis, necrotizing pneumonitis, and liver abscesses. We present the case of a previously healthy 43-year-old woman with a liver abscess caused by Lactococcus lactis spp. lactis. In addition, the patient had brain and tubo-ovarian abscesses. She was treated successfully with percutaneous abscess drainage and adequate antibiotics. To our knowledge, this is the first case of a liver abscess due to Lactococcus lactis in Korea. (Korean J Med 77:S1128-S1132, 2009)