連繫된 電力系統에서의 最適負荷 周波數 制御

韓萬春,申明澈,張成煥,李基西 연세대학교 산업기술연구소 1979 논문집 Vol.11 No.1

A linear state equation of the first order differential form relating the load-frequency dynamic characteristics of interconnected power systems was derived for use in computer simulations. A new solution of the algebraic matrix Riccati equation for applications in quadratic optimal controllors and least-square state estimators determination was developed. The program for a dynamic state equation for two interconnected control areas was developed. The optimized load-frequency deviation was analysed and a numerical analysis was tried based on the computer simulation. It was shown that the dynamic response of the load-frequency could be optimized with the weighting factors R and Q The result was that the load-frequency and the tie-line deviation were visibly reduced.

경영자보상구조에 관한 실증연구

신현한,이만용,장진호 연세대학교 경영연구소 2003 연세경영연구 Vol.40 No.1

본 연구는 2001~2002년 거래소와 코스닥에 상장 및 등록되어 있는 기업을 표본으로 하여 현금성과급에 영향을 주는 요인을 분석하고, 현금성과급과 주식성과급 간의 관계를 살펴보았다. 연구결과 첫째, 동일 산업에 속한 비교회사와의 상대적 성과평가(relative performance)에 근거하여 경영자보상이 결정됨을 발견하였다. 둘째, 스톡욥션을 부여한 기업의 경우, 회계적 성과측정치와 경영자보상간의 민감도가 낮음을 발견하였다. 이 결과는 회계적 경영성과 측정치가 경영자의 성과를 측정하는데 적합성이 떨어지는 경우, 기업은 주식수익률에 의한 스톡옵션 인센티브제도를 도입하여 회계적성과측정치에 근거한 현금보상을 보완한다고 해석된다. 셋째, 임원의 현금보상이 높은 기업들에서 스톡옵션이 도입될 확률이 높음을 발견하였다. 이는 기업들이 현금성과급에 의한 유인제도뿐만 아니라 스톱옵션 인센티브제도를 함께 사용하고 있음을 의미한다.

구리의 전기석출시 젤라틴이 물성에 미치는 영향

신석재,강현춘,안형환,강안수,김용렬,한성만,이한섭 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

In the electrodeposition of copper foil for preparing printed circuit boards, a little amount of gelatin as a addition agent has been used for the better characteristics of a coat of electroplating. Gelatin modifies the physical properties such as mechanical strength, matte-side roughness, ultimate tensile strength(U.T.S), and elongation of copper foil, furthermore gelatin have influence on the structure of electrodeposits and the cathode polarization. The electrolyte used was of a composition; CuSO₄·5H₂O 300g/ℓ, H₂SO₄ 100g/ℓ, NaCl 10 ppm as a brightner, and was gelatin 0-7 ppm as a addition agent. Current density was 50 A/dm², and the temperature of electrolytic bath was 50 to 52 ℃. Experiments showed that the optimum gelatin concentration was 5 ppm with the consideration of the numbers of electrodeposited nuclei. And the nuclei numbers was sharply increased under 5 ppm, but was almostly constant above 5ppm. Average matte-side roughness by Surfcorder was gradually increased with the increasing gelatine concentration up to 2 ppm, and maximum roughness was observed at 2ppm. The roughness showed gradual decrease within the concentration range of 2 to 4 ppm, and was almost constant above 4ppm . Within the gelatine concentration range of 0 to 7 ppm, as the concentration increased, UTS was increased and elongation was decreased logarithmically. Also, in comparison between UTS and elongation, gelatin was identified as an addition agent acting inversely.

알코홀이 r-GTP 활성에 미치는 인삼의 영향

이상한,조만희,신경현,김창세 순천향대학교 1989 논문집 Vol.12 No.3

This study was carried out to investigate the effects on the changes of the r-glutamyl transpeptidase activity of ethanol-administered white rats. There was classified into group; ethanol treated group(group A), ethanol treated group which was pretreated with ginseng extract(group B), ginseng extract treated group(group C), and ginseng extract treated group which was pretreated with ethanol(group D). White rats of four groups were treated with combined 1% ginseng extract and / or 20% ethanol for 30 days, and were measured the changes of r-GTP activity on the serum, hepatic and renal tissue sample collected at 5 days interval. Following results have been obtained. 1. The changes of serum r-GTP activity were significantly decreased in ethanol treated group B which was pretreated with ginseng extract than in ethanol treated group A. The values were highly significant at the 20th day of feeding. 2. The changes of hepatic r-GTP activity were more increased in group A and decreased in group D. The values were found significantly lowest in 10th and highest in 5th days. 3. The changes of renal r-GTP activity were more increased in group A and decreased in group D. The values were significantly highest in 10th and lowest in 20th days. Based on these results it was found that the changes of r-GTP activity between serum and hepato-renal tissue were exist and the protective action of ginseng against alcohol degradative effects was noted.

만성 화농성 중이염의 세균학적 고찰

윤신의,문문만,김승찬,박희완,나한조,최봉남 朝鮮大學校 附設 醫學硏究所 1991 The Medical Journal of Chosun University Vol.16 No.1

The chronic suppurative otitis media is one of the most common disease in the otologic field. And the works on bacterial distribution of chronic suppurative otitis media were studied by many otologist, but there is some difference. The bacteriologic study was done on 126 cases of chronic suppurative otitis media who visited the Department of Otolaryngology, Chosun University Hospital between January 1989 and December 1989 and the following conclusions were obtained. 1) In sex distribution, the male had higher incidence rate than female (M: 56.3%, F:43.7%). 2) In age distribution, 3rd decade (34.1%), 2nd decade (34.1%), were most prevalent. 3) In duration of the disease, the hightest frequence was below 5 years duration 4) Among 126 cases, 98 cases(77.8%) were unilateral (right ear was 47 cases(37.3%) and left ear was 51 cases(40.5%))and 28 cases(22.2%) were bilateral. 5) The 136 cases(88.3%) showed the positive results under culture, but 18 cases(11.7%) didn't growthed. Among 136 cases 95 cases(61.7%) had single infection and the 41 cases(26.6%) had mixed infection. 6) The most frequently isolated bacteria was staphylococcus(38 strains, 27.9%) and next were proteus(27 strains, 19.9%) and pseudomonas (22 strains, 16.2%). 7) The Staphylococcus was sensitive to cephalothin(94.7%), amikacin(78.9%) and resistant to penicaIin(63.2%). 8) The Proteus was sensitive to amikacin(92.6%), cephalothin(88.9%) and resistant to minocycline(81.5%) and gentamicin(70.4%). 9) The Pseudomonas was sensitive to amikadn(86.4%), gemtamicin(59.1%) and resistant to minocycline(90.9%), ampicillin(86.4%) and cephalothin(86.4%).

Phellinus linteus 균사 배양물로부터 분리한 단백다당체 Kp의 항암활성

정경수,김신숙,김희수,한만우,김병각 충남대학교 약학대학 의약품개발연구소 1994 藥學論文集 Vol.10 No.-

A protein-polysaccaride fraction Kp(53.9% polysaccharide, 14.2% protein) was separated from the shake-cultured mycelia of a basidiomycetous fungus, Phellinus linteus, and its antitumor activity against sarcoma 180 in ICR mice was investigated. When administered after the tumor implantation. Kp exerted antitumor activity by inhibiting the growth of the sarcoma 180 solid tumor by 71.5% and increasing the life span of the sarcoma 180 ascitic mice by 51.5% at 100 ㎎/㎏. In pretreatment tests, in which Kp was administered once daily for 9 days before the tumor implantation. Kp inhibited the growth of the solid and ascites form of sarcoma 180, respectively, by 35.4% and by 80.3% at 100 ㎎/㎏. However, Kp showed no in vitro cytotoxic activity against a murine leukemia L1210 and a human gastric tumor SNU.1 upto the concentration of 200 ㎍/㎖. From these results, it is clear that the antitumor activity of Kp is exerted through its immunomodulating activity on the host's immune system.

제1형 신경섬유종증 환자에서 양측성으로 흉추에 발생한 신경섬유종 - 증례 보고 -

박석규,장재칠,도재원,김범태,신원한,최순관,변박장,이만복,고은석 대한신경외과학회 1999 Journal of Korean neurosurgical society Vol.28 No.1

Intimate partner violence and incidence of depression in married women: A longitudinal study of a nationally representative sample

Han, Kyu-Man,Jee, Hee-Jung,An, Hyonggin,Shin, Cheolmin,Yoon, Ho-Kyoung,Ko, Young-Hoon,Ham, Byung-Joo,Kim, Yong-Ku,Han, Changsu Elsevier 2019 Journal of affective disorders Vol.245 No.-

<P><B>Abstract</B></P> <P><B>Background</B></P> <P>Intimate partner violence (IPV) has a serious detrimental effect on mental health outcomes. We aimed to investigate the association of verbal or physical IPV with incidence of depressive symptoms in both married women and men according to the victim-perpetrator role. The potential mediating role of verbal or physical IPV in the association between satisfaction level with family relationships or childhood adversity and the incidence of depressive symptoms in married adults was also explored.</P> <P><B>Methods</B></P> <P>The Korea Welfare Panel Study (KOWEPS) in 2006 and 2007 dataset was analyzed for 9217 married respondents aged 19 years or older. Physical and verbal IPV was assessed according to victim-perpetrator role in 2006. Depressive symptoms were evaluated by the Center for Epidemiologic Studies Depression Scale, 11-item version in 2006 and 2007. Association of IPV with incidental depressive symptoms was investigated with logistic regression analysis fully-adjusted for all potential confounding factors.</P> <P><B>Results</B></P> <P>The bidirectional role of verbal IPV and victimization by physical IPV led to incidence of depressive symptoms in married women. Verbal IPV significantly mediated the association between satisfaction level with the family relationship and incidental depressive symptoms in women.</P> <P><B>Limitations</B></P> <P>We did not investigate the influence of premorbid depressive symptoms on new-onset IPV.</P> <P><B>Conclusions</B></P> <P>This study is the first to demonstrate that gender and the victim-perpetrator role are critical moderating factors in the association between IPV and depressive symptom incidence using a nationally representative sample</P> <P><B>Highlights</B></P> <P> <UL> <LI> Influence of intimate partner violence (IPV) on incidence of depression was assessed. </LI> <LI> 9217 married adults in data of Korea Welfare Panel Study (KOWEPS) 2006 and 2007. </LI> <LI> Center for Epidemiologic Studies Depression Scale, 11-item version was used. </LI> <LI> Bidirectional role of verbal IPV led to incidence of depression in married women. </LI> <LI> Victimization by physical IPV led to incidence of depression in married women. </LI> </UL> </P>

Preparation of Recycled Polyvinyl Alcohol) (PVA)/Iodine Polarizing Film

Han, Man Ho,Shin, Jae Kyun,Oh, Kyeong Il,Lee, Young Jae,Song, Du Hyun,Chung, Yong Sik,Lee, Yong Rok,Choi, Han Gon,Oh, Tae Hwan,Han, Sung Soo,Noh, Seok Kyun,Lyoo, Won Seok SAGE Publications 2010 POLYMERS AND POLYMER COMPOSITES Vol.18 No.7

Bowel infarction due to intestinal mucormycosis in an immunocompetent patient

Han Lim Choi,Yoon Mi Shin,Ki Man Lee,Kang Hyeon Choe,Hyun Jeong Jeon,Ro Hyun Sung,Kyeong Seob Shin,Young Deok Shin,Hyo Yung Yun,Young Jin Song,Jae-Woon Choi,Dong Hee Ryu 대한외과학회 2012 Annals of Surgical Treatment and Research(ASRT) Vol.83 No.5

Mucormycosis is a fatal opportunistic fungal infection that typically occurs in immunocompromised patients. The classical manifestation of mucormycosis is a rhinocerebral infection, and although primary gastrointestinal infection is uncommon, it has an extremely high mortality rate in immunocompromised patients. Furthermore, cases of gastrointestinal mucormycosis in an immunocompetent host are rarely reported. Here, we describe our experience of a male patient, with no underlying disease, who succumbed to a bowel infarction caused by intestinal mucormycosis during mechanical ventilatory care for severe pneumonia and septic shock.