Einstein-Maxwell-Dilaton 이론에서의 Dyonic BPS 해

박달호 尙志大學校 1998 論文集 Vol.19 No.-

We discuss the symmetries of non-rotating dyonic system in the Einstein-Maxwell theory coupled to dilaton. The symmertries are characterized by the dilaton coupling constant α. When α≠1 the symmetry is trivial, but when α= 1 the symmetry is enlarged. We also present the dyonic BPS solutions by using the fact that the geodesics in potential space of the Einstein-Maxwell-Dilaton theory give the force-balance condition. The solutions, in general, have arbitrary scalar charges and naked space-time singularities.

N-benzoyl과 N-benzylaniline류의 광화학

박용태,이익형,윤달호 慶北大學校 自然科學大學 1986 自然科學論文集 Vol.4 No.-

Several N-benzoylanilines were prepared by adding aniline into the hot substituted benzoyl chlorides for photochemical reaction studies. N-benzylanilines were also synthesized by reacting appropriated benzyl halides with anilines. N-benzoyl or N-benzylanilines in the deaerated benzene solution or acetonitrile-water solution in presence of hydroxide were irradiated with 100W-mercury arc lamp. N,N-dibenzoylaniline and N,N-bis-(2-chlorobenzoyl)-aniline gave photo-Fries type reaction products effectively. N-(o-chlorobenzyl)aniline gave photo-cyclized reaction products in the base condition and photo-Fries type reaction products in the deaerated benzene solution.

고정층과 순환유동층에서 CaSO_4의 환원반응에 대한 온도와 CO농도의 영향

배달희,류호정,박재현,이창근,선도원,이동규 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

순환유동층 석탄연소로에서 석회석에 의한 찰황반응에 영향을 미치는 CaSO_4의 환원반응에 의한 SO-2 재배출을 실험적으로 확인하고 SO_2의 재배출에 미치는 온도와 CO 농도의 영향에대해 상용 순환유동층에 적용할 수 있는 기초자료를 확보하기 위해 고정층과 순환유동층에서 층물질로 석회석과 상용 순롼 유동층 하부회를 이용하여 환원실험을 수행하였으며 CaSO_4의 환원반응에 미치는 온도와 CO의 영향을 측정 및 해석하였다. 고온조건에서 CO가 환원제로 작용하여 C_aSO_4로부터 SO_2가 재배출되는 현상을 확인하였으며 CaSO_4로부터 SO_2의 재배출은 온도와 CO농도가 증가함에 따라 증가하였다. 본 실험의 결과에 의해 온도가 증가함에 따라 석회석에 의한 탈황율이 감소하는 현상을 환원이론으로 설명할 수 있다는 것이 확인되었다. For qualitative understanding of the sulphur capture process in a circulating fluidized bed fumace, the effects of temperature and CO concentration on the reactivity of partially sulfated CaO were experimentally examined. The tests were performed in a fixed bed reactor and lab-scale circulating fluidized bed reactor. The materials used were partially sulfated domestic limestone and bottom ash drained from commercial circulating fluidized bed furnaces. The re-emission of SO_2 from partially sulfated limestone and bottom ash increases with temperature as well as with concentration of the reducing agent CO. From the results of this study, the temperature dependence of sulfation could be explained by reduction theory.

Streptomyces thermocyaneoviolaceus의 Xylanase 생산조건 및 Xylooligo당의 생산

주길재,박희동,최준호,이인구,이오석,권달호 慶北大學校農業科學技術硏究所 1998 慶北大農學誌 Vol.16 No.-

농산폐자원으로부터 기능성물질인 xylooligo당을 생산하기 위해서 내열성 균주인 S.thermocyaneoviolaceus가 생산하는 xylanase의 생산최적조건을 검토한 결과 0.8% 밀기울, 0.06% yeast extract, 0.06% bactopeptone, 0.05% MgSO₄·7H₂O, 0.005% FeSO₄·7H₂O, 0.05% KH₂PO₄및 0.2% K₂HPO₄를 함유한 배지(pH7.0)에서 50℃, 24시간 배양시 최고효소활성(2.47 unit/ml)의 배양상징액을 얻을 수 있었다. 효소의 최적반응조건은 pH5.5, 65℃였다. 또한 pH안정성을 조사한 결과 pH4.5∼9.5사이에서 4℃에서 12시간후에도 80% 이상의 효소활성을 유지하였고, 열 안정성은 60℃에서 1시간 처리후 94%이상의 효소활성을 유지하는 내열성이 있는 효소였다. 생산된 xylanase birchwood xylan 반응생성물을 TLC 및 HPLC로 확인해 본 결과, pH가 낮을수록(pH 5.0∼6.0) xylobiose와 xylotriose및 소량의 xylose의 양이 증가하였고, pH가 높을수록 (pH8.0∼9.0) X₄이상의 각종 xylooligo당의 양이 상대적으로 증가하였다. 또한 24 시간후에는 xylan의 상대량이 25% 이하로 감소하면서 주분해산물로 xylobiose가 생산되었으며 xylotriose와 xylose 및 X₄이상의 각종 xylooligo당이 생산되었다. A thermotolerant bacterium, Streptomyces thermocyaneoviolaceus which produced xylan-degrading enzymes, utilized excellently xylan of wheat bran by producing the enzymes in comparison with that of birchwood or oat spelts. Optimal enzyme production was achieved in WB medium containing 0.8% wheat bran, 0.06% yeast extract, 0.06% bactopeptone, 0.05% MgSO₄·7H₂O, 0.05% FeSO₄·7H₂O, 0.05% KH₂PO₄ and, 0.2% K₂HPO₄(pH 7.0) at 50℃ for 24 hrs. The optimal pH and temperature for the hydrolysis of xylan were pH 5.5 and 65℃, respectively. The enzyme activity was retained more than 80% at the range from pH 4.5 to pH 9.5 at 4℃ for 12 hrs and 94% on the heat-treatment at 65℃ for 1 hr. Xylobiose, xylotriose, xylose, and other xylooligosaccharides were produced as end products from hydrolysis of birchwood xylan by the xylanase of S. thermocyaneoviolceus.

Ex Vivo Expansion and 3-D Culture of Human Chondrocytes

Ji-Young Han,Seah Park1,Su Yeon An,Kyung Suk Kim,Seung H. Kim,Seung-Ho Koh,Wonjae Roh,Byung-Rok Do,Yong-Dal Yoon,Haekwon Kim 한국동물생명공학회(구 한국동물번식학회) 2004 발생공학 국제심포지엄 및 학술대회 Vol.2004 No.1

폐플라스틱 유동층 열분해 공정연구

선도원,조성호,배달희,박영성 大田大學校 環境問題硏究所 1996 환경문제연구소 논문집 Vol.1 No.-

Process characterization of waste plastics pyrolysis in a bench scale fluidized bed test unit was investigated. Feasibility of commercial scale process such as proper feeding system and reaction control ability were analysed and confirmed based on the reaction characteristics varying with the plaxtics and system assemblies. Eight pure or waste plastic samples were collected from the industrial waste plastics generation source in Korea. Selected samples were HDPE, LDPE autobovile interior, XLPE electric wire coat, synthetic rubber, EVA shoe sole, PS(monomer and styrofoam) and ABS. The pattern of decomposition reflected composition and molecular structure of plastics. Decomposition of polyolifin produced linear paraffinic and olefinic compounds. Recovery of styrene monomer and aromatic compounds were attained from the phrolysis of PS and ABS. However, secondary reaction was monitored was monitored even from the pyrolysis of aliphatic samples of XLPE and EVA.

최단경로문제에서 k개의 치명호를 찾는 방법

안재근,정호연,박순달 한국경영과학회 1998 韓國經營科學會誌 Vol.23 No.4

This paper deals with a mathematical model and an algorithm for the problem of determining k most vital arcs in the shortest path problem. First, we propose a 0-1 integer programming model for finding k most vital arcs in shortest path problem given the ordered set of paths with cardinality q. Next, we also propose an algorithm for finding k most vital arcs in the shortest path problem which uses the 0-1 integer programming model and shortest path algorithm and maximum flow algorithms repeatedly. Malik et al. proposed a non-polynomial algorithm to solve the problem, but their algorithm was contradicted by Bar-Noy et al. with a counter example to the algorithm in 1995. But using our algorithm. the exact solution can be found differently from the algorithm of Malik et al.

국내무연탄 연소에 따른 순환유동층내의 열전달 특성

선도원,배달희,조성호,박영성 大田大學校 産業技術硏究所 1997 산업기술연구소 論文集 Vol.8 No.1

순환유동층 시험연소로에서 국내무연탄의 연소에 따른 연소로 내벽의 열전달 특성을 고찰하였다. 연로소의 온도변화 및 층밀도의 변화에 따른 전열계수의 변화를 측정하였다. 한편 전열모델을 구성하고 그 계산치를 실험결과와 비교하였다. 또한 복사 전열에 대한 고찰을 통해 순환유동층 열전달에 미치는 복사의 영향을 추정하였다. Bed to wall heat transfer in a both scale circulating fluidized bed was studied. Domestic anthracite was burned to heat the combustor. Variation of heat transfer rate with combustor temperature, bed density was monitored. Test result was compared with a proposed heat transfer model and radiation effect in heat transfer was predicted

비호지킨 림프종의 REAL 분류와 cyclin D1, bcl-2, p53및 bcl-6 단백발현

이미자,전호종,정종달,박유환,김민 조선대학교 2001 The Medical Journal of Chosun University Vol.26 No.1

Background and Objectives : There has been a continuous evolution of the lymphoma classification and recently a Revised European-American Lymphoma (REAL) classification was proposed by the International Lymphoma Study Group. This new classification requires information on immunophenotypic and molecular biologic markers in addition to the usual histologic findings. The distinction between mantle cell lymphoma (MCL) and other low grade B cell lymphomas is important because MCL has a more aggressive clinical course. The aim of this study is to determine the clinical characteristics and the relative frequency of malignant non-Hodgkin’s lymphomas (NHL) and analyze the expression of the cyclin D1, bcl-2, p53 and the bcl-6 protein. Materials and Methods : One hundred and twelve cases of NHL were recategorized by the newly described REAL classification categories and investigated for the expression of the cyclin D1, bcl-2, p53 and bcl-6 protein by the immunohistochemical method. Results : There were higher rates of extranodal lymphoma, diffuse large B cell lymphoma, and angiocentric lymphoma and lower rates of T cell lymphoma and follicular center lymphoma compared with Western countries. Cyclin D1 is expressed in all cases of MCL. But no cases except for MCL showed positive for cyclin D1. The expression of bcl-2 had decreased in high-grade lymphomas. Conclusion : It suggests that the cyclin D1 expression in mantle cell lymphoma could be reliably distinguished from its expression in other non-Hodgkin’ s lymphomas. In addition, bcl-2 may be useful for the differentiation of the low grade lymphoma from the high grade lymphoma.

운동처방 유형이 중년여성의 혈중지질 및 체지방량에 미치는 영향

정혜윤,임달식,박후성,전용욱,김재호,노재성 朝鮮大學校 스포츠科學硏究所 2007 스포츠科學硏究 Vol.18 No.-

This study was to examine the effects of Aerobic exercise program of body fat and mood state for women with obesity, and to apply this exercise program to the treatment and the promotion of health maintenance of obese women as a nursing intervention. Date were analysed by SPSS Win 12.0 program. Descriptive statistics used on demographic data of the participants was analysed in real number and percentage, body fat and the difference in mood state before and after the walking exercise program were analysed using the paired t-test . The results of this study were as follows: With administration of this program, so, the Aerobic exercise program showed and effect of the decrease for women with obesity and it also had an effect on the decrease of percentage of body fat for them. According to the results of this study, the walking exercise program as a nursing intervention had an effect of the body fat for women with obesity. however, the program did not prove the statistical significance for the change of mood state. Aerobic exercise program showed that effect is though fat woman's sieve local rate, Decrease that T-C keeps in mind from exercise rakeful and great kindness change to 207.8±23.2 as statistical difference that appeared, and decreased from great kindness change to shame upper HDL-C's exercise ago but keep in mind as statistical appear, Is looked that decrease that change before LDL-C's exercise keeps in mind as statistical by 138.1±20.5 appears. When see on the basis of result of something wrong continuous and regular abortion small success exercise because have middle age woman's physical strength E according to exercise form health promotion plan though to effect by Iteulgeot is considered, and decrease to note sieving amount power of a number and sieve local amount and appeared that abortion small success exercise exerts more affirmative effect.