연령증가에 따른 혈압요소들의 좌심실비대 및 관동맥질환과의 관련성

박재석,박창규,박미영,박재형,김용현,나진오,신성희,서순용,홍순준,박성미,임홍의,김응주,서홍석,오동주,노영무 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

부추 전용 포장 결속기 개발

김용석(Yong-Seok Kim),박성희(Sung-Hee Park),박태표(Te-Pyo Park),양순용(Soon-Young Yang) 대한기계학회 2008 대한기계학회 춘추학술대회 Vol.2008 No.5

An Allium-odorum is difficult material to handling, because it is soft and weak as mechanical. For bundling work of allium-odorum, we must grip in the bundle shape of unit weight, however, it is difficult that grip allium-odorum by hand because the bundle bulk is very big. Especially, in packing work, the bundle shape of allium-odorum package than other vegetables is very important, because difference of a price becomes much according to the bundle shape. In this paper, we propose bundling mechanism for a quadrangle shape in bundle shape, and semi-automatic bundling mechanism that makes use of a eccentric roller and a triangularity link. We carry out mechanical modeling and analysing respectively using the CATIA V5 and SimDesigner. We manufactured the prototype of the semi-automatic bundling machine, and got satisfied result through field test. And this machine will be commercialized and announced soon.

K이 흡착된 Si(111)7×7표면에 대한 RHEED 연구

박종윤,이순보,이경원,안기석,신익조,강건아 성균관대학교 1990 論文集 Vol.41 No.2

상온 및 200℃∼600℃의 Si(111) 7×7 표면에 칼륨(K)을 증착하였을 때의 표면격자구조 변화를 RHEED로 관측하였다. K 증착시 Si(111)7×7 기판의 온도가 상온인 경우, 어느 일정한 증착시간(포화덮임률에 도달했다고 추정되는 증착시간)이 지난 후에는 원래의 깨끗한 Si(111)7×7 패턴과 유사한 Si(111) 7×7-K 패턴이 관측되었고, 증착시간을 증가시켜도 RHEED 패턴은 변화하지 않았다. 이것을 annealing하면 350℃까지는 RHEED 패턴에 변화가 없다가 그 이상의 온도가 되면 서서히 원래의 7×7 패턴으로 되돌아가기 시작한다. Si(111) 7×7기판의 온도를 200℃∼600℃로 유지하면서 K을 일정시간(450℃에서 3×1이 형성되는 증착시간)이상 증착시킨 경우에 250℃까지는 상온의 경우와 비슷한 형태의 변형된 7×7 패턴이 관측되고, 300℃∼550℃일때는 3×1, 550℃ 이상에서는 1×1 구조가 관측되었다. 이때 300℃∼550℃에서 형성된 Si(111) 3×1-K 구조는 450℃에서 1분 정도 annealing 하면 항상 Si(111) 1×1-K 구조로 상전이가 일어남을 관측하였다. Potassium adsorbed surface structures of Si(111) 7×7 surface at room and high temperatures(200℃∼600℃) were investigated by RHEED. Potassium adsorption on the Si(111) 7×7 surface to saturated coverage at room temperature changed the RHEED pattern of Si(111) 7×7 to Si(111) 7×7-K. Subsequent heating of the Si(111) 7×7-K surface above 350℃ results in a Si(111) 7×7 with desorbing K. The RHEED pattern of the K-adsorbed on the Si(111) 7×7 surface up to the adsorption temperature of 250℃ was the modified 7×7 pattern, quite similar to that of the Si(111) 7×7-K, observed at room temperature. The 3×1 structure was observed in the temperature of adsorption between 300℃ and 550℃. Regardless of the adsorption temperature, a phase transition always took place from the Si(111) 3×1-K structure to Si(111) 1×1-K after annealing at 450℃ over 1 minute.

해안 매립에 따른 항내 조류변화 예측

박석순,박재우 이화여자대학교 환경문제연구소 1997 이화환경연구 Vol.1 No.-

This paper presents the results from a hydrodynamic model study to predict the impacts of coastal reclamation in Pusan harbor system using RMA2 which is a tidal flow model of the US Army Corps of Engineers' TABS-2 system. A finite element mesh was constructed and refined to cover the complicated geometry of Pusan harbor system and the proposed reclamation area. The model was calibrated to tidal elevation and currents measured during spring fall syzygys. Under the three different tidal conditions including summer winter syzygys, spring fall quarters, and summer winter quarters, the model predictions were compared with the field measurements both in tidal elevation and current. In all cases, there were excellent agreements between the model predictions and the field measurements. The validated model was then used to predict the changes in tidal current and elevation that might occur due to the coastal reclamation. It was predicted that there would be no change in tidal elevation of this system after the reclamation. In tidal current, however, discernible changes were predicted near the proposed reclamation area both in magnitude and direction.

은행 위험관리 방법과 대책에 관한 연구

朴荀植,徐錫完 효성여자대학교 산업경영연구소 1998 경영경제 Vol.15 No.-

Bank risk management is more than just policies and procedures covering the various segments of a business. Management must give thought to the risks to which the strategies give rise. Risk management policies which delineates serve the dual purposes of establishing patterns of behavior which delineates serve the dual purposes of establishing patterns of behavior which are consistent with of risk to be assumed along the way. The evaluation culminates in a rating knowing by its acronym CAMEL. CAMEL is derived from the first letters of the words Capital, Assets, Management, Earnings and Liquidity. Especially, bank risk management technique is the risk measurement framework and the capital requirement. As the capital requirement, the principal form of eligible capital to cover market risk consists of shareholders' equity and retained earnings (tier 1 capital) and supplementary capital (tier 2 capital) as defined in the 1988 Basle Accord. But banks may also, at the discretion of their national authority, employ a third tier of capital (tier 3 capital), consisting of short-term subordinated debt as defined for the sole purpose of meeting a proportion of the capital requirement for market risks. As risk measurement framework, bank will have flexibility in devising the precise nature of their models, but the standards will apply for the purpose of calculating their capital change. VAR(value at risk) must be computed on a daily basis. In calculating VAR, a 99th percentile, one-tailed confidence interval is to be used. An instantaneous price shock equivalent to a 10 day movement in price is to be used and so on. A VAR statement has below components, the dollar amount or the probability of the loss not exceeding the dollar amount, a methodology for using the assumptions that define normal market conditions, a methodology for using the assumptions to compute the VAR. Accordingly, the above mentioned domestic bank risk management is to request a sufficiency of the capital requirement and devising of the risk measurement framework models with value at risk.

소유구조 결정요인과 상장기업의 소유구조 개선방안

박순식,서석완 효성여자대학교 산업경영연구소 1998 경영경제 Vol.16 No.-

사회환경교육의 교육과정 표준화 모형 및 통합프로그램 개발연구

박석순,최돈형,성효현,허명,강명희,이숙임,남상준 이화여자대학교 환경문제연구소 1998 이화환경연구 Vol.2 No.-

This paper presents the development of standardized modules and an integrated program which will be used for social environmental education. The study objectives are to develop modules which are based on various environmental topics, to relate the regional environmental topics to the educational modules and program, and to include the demand of students in the modules and program. Literature and questionary surveys, as well as, module development method were utilized as research tools. The titles of developed modules are "The Green Plant Earth," "Unexpected Resources: Save Resources and Recycle", "Water as the Mother of All Lives", "The Blue Sky with Clean Air", and "Soil as the Home of All Living and Non-living Things". It is hoped that the developed modules and program are utilized as course materials and curriculum for social environmental education in various educational institutes. The study results will be materialized as multimedia in near futher.

미국 뉴저지주 매차포닉강의 수질 모델 연구: QUAL2E 모델 적용

박석순,크리스토퍼 유클린 江原大學校 附設 環境硏究所 1990 環境硏究 Vol.7 No.-

미연방 환경청에서 개발된 하천 수질 모델 QUAL2E를 이용하여 미국 뉴저지주 매차포닉강의 종합적 수질 모델을 형성하였다. 총 15.3㎞의 하천 구간을 8개의 소구간으로 분할하였고 각 구간은 16.9월과 11월에 하천 유량이 갈수량을 나타낼 때 각각 3일간 연속적으로 얻어졌다. 모델은 9월 실측 자료를 이용하여 보정되었고 11월 실측 자료로 검정되었다. 모델된 수질 자료는 용존산소(DO), 생화확적 산소 요구량 (BOD_(5)),부유성 고형물질(TSS) A comprehensive water quality model was constructed for the Matchaponix Brook, New Jersey, U.S.A., using the USEPA Enhanced Stream Quality Model (QUAL2E). The study area (15.3 ㎞)was divided into eight (8) reaches. Each reach was then subdivided into uniform computational elements of 160.9m. Field Data were obtained from two synoptic field sampling surveys performed during summer warm water, low flow (September,)

Cs이 흡착된 Si(111)7×7표면에 대한 RHEED연구

박종윤,이순보,이경원,안기석,강건아 성균관대학교 1991 論文集 Vol.42 No.1

Cesium-adsorbed surface structures on Si(111)7×7 were investigated at room and high temperatures(200∼700℃) by RHEED. The RHEED patterns of Si(111) 7×7 was changed to the modified 7×7 and the 1×1 patterns with increasing the deposition times of Cs at RT. It was observed that the structure of the Cs-adsorbed Si (111) 7×7 surface at saturation coverage is the 1×1 structure at RT. The ◁그림삽입▷(원문을 참조하세요) 1 and 1×1 structures appeared successively at the adsorption temperature of 300℃, 350∼400℃ and 450℃, respectively. After subsequent heating of 1×1 surface above 550℃ and of ◁그림삽입▷(원문을 참조하세요) surface above 600℃, each RHEED pattern gradually returned to the original Si(111)7×7 pattern. 상온 및 200∼700℃의 Si(111)7×7 표면에 Cs(Cesium)을 증착하였을 때 표면격자구조의 변화를 RHEED로 관측하였다. Cs 증착시 Si(111)7×7 기판의 온도가 상온인 경우, 포화 덮임률에 도달했다고 추정되는 일정 증착시간 전에는 원래의 깨끗한 Si(111)7×7 패턴과 거의 유사한 변형된(modified) Si(111)7×7-Cs 패턴이 관측되었다. 그후 포화 덮임률에서는 1×1패턴이 관측되고 증착량을 증가시켜도 패턴의 변화는 관측되지 않았다. 이 구조를 다시 annealing시키면 약 550℃부터 서서히 원래의 7×7구조로 되돌아가기 시작한다. Si(111)7×7기판의 온도를 220∼700℃로 유지하면서 Cs을 증착시킨 경우에 약 250℃까지는 상온에서와 비슷한 변형된(modified) 7×7이 관측되고 약 300℃에서는 ◁그림삽입▷(원문을 참조하세요) 350∼400℃ 정도에서는 ◁그림삽입▷(원문을 참조하세요)과 3×1이 겹쳐셔 관측되었다. 그리고 450℃ 이상에서는 1×1구조가 관측되었다. 이때 약 300℃에서 형성된 ◁그림삽입▷(원문을 참조하세요) 350℃에서 형성된 ◁그림삽입▷(원문을 참조하세요) 3+3×1 구조는 약 500℃ 정도까지 다시 annealing함에 따라 다리 1×1구조로 상전이가 일어난후, 약 600℃부터 원래의 7×7의 초격자점들이 나타나기 시작했다. 이들 결과로부터 Si(111)7×7 표면에 Cs을 증착하는 경우에는 일정한 포화 덮임률(saturation coverage)이 있는 것으로 추정되고, 이 덮임률에서 관측된 고온에서의 상전이는 증착량(증착시간)에는 무관하고 온도에만 의존함을 알 수 있었다. 또한 1×1 구조와 ◁그림삽입▷(원문을 참조하세요) 구조에 대하여 Cs의 탈착은 각각 약 550℃와 600℃에서 일어나기 시작하여 700℃에서 완전히 탈착됨을 알 수 있었다.

고온고습으로 저장된 백미의 이화학적 및 취반 특성

박석규,전순실,박미연 순천대학교 기초과학연구소 1994 基礎科學硏究誌 Vol.5 No.-

The quality difference of milled rice stored at a low temperature and optimum humidity(LTH) and a high temperature and humidity (HTH) was determined by the methods of acidity of fat, brown color index, reducing sugar and microflora. Moisture contents of milled rice stored at LTH and HTH for 10 weeks were 14.7% and 19.5%, respectively. Moisture content after 8 weeks of LTH and 4 weeks of HTH exceeded 13% on dry basis, growth-limiting moisture of mold. Brown color index and reducing sugar contents of milled rice stored at HTH were slightly higher than those of LTH. There was a notable difference in acidity of fat between milled and brown rice stored at HTH. The apperance(p<0.05) and texture(p<0.01) of cooked rice after storage for 10 weeks at LTH and HTH were significantly different in sensory evaluation with no significant difference in odor and taste. Mean values of breaking test in rheometer were better in LTH than in HTH for taste score. Growth of mold and bacteria in rice were not increased by storage. Rice weevil exhibited imago in brown rice and milled rice after storage of 5 weeks and HTH. Milled rice stored at LTH for 2 weeks did not absorb Kimchi odor from refrigerated chamber.