탐색 공간 변형을 적용한 그래프 분할 문제 해결 방안

성연중,한치근 慶熙大學校 1997 論文集 Vol.26 No.-

In this paper, we consider a graph partition problem, in which we partition the vertices of the graph into 2 parts and minimize the sum of costs of edges that connect two parts. We use Kernighan's heuristic method based on a local search method for solving the problem, In order to increase the possibility of finding the global optimum, we apply smoothing techniques to the heuristic method and propose two smoothing algorithms. Also, we propose an algorithm for obtaining an initial solution and using the initial solution, we can get a minimum solution that is not worse than solutions that can be obtained using many random initial solutions. Through the computational experiments, we demonstrate the proposed methods are better than the existing method for the graph partition problem.

산업기술 정책환경 변화에 따른 대응전략

한상연,이유신 경희대학교 지역문제연구부 1997 지역개발연구 Vol.4 No.-

결절성경화증 환자에서의 SPECT 뇌영상 : 예비적 연구 A preliminary report

한설희,이상수,정승연 충북대학교 의과대학 충북대학교 의학연구소 1991 忠北醫大學術誌 Vol.1 No.1

간질발작을 포함한 전형적인 삼징후가 동반된 결절성경화증 환자를 대상으로 뇌파검사, 뇌전산화단층촬영술 및 단일광자방출단층촬영술을 시행하였다. 뇌전산화단층촬영술에서는 상의하석회화병소와 조영제증강이 뚜렷하지 않은 피질에 연한 저음영 소견이 관찰되었으며 이어서 시행한 단일광자방출단층촬영술에서는 뇌전산화단층촬영술 소견보다 더 광범위한 부위에 관류결손이 관찰되었다. 단일광자방출단층촬영술은 결절성경화증 환자에서 간질발현 병소인 피질결절을 발견하는데 있어서 전산화단층촬영술 및 뇌파검사보다 더 유용한 방법이며 치료방침 결정이나 예후판정에 있어서도 큰 도움을 줄 것으로 기대된다. Two patients with a well-established diagnosis of tuberous sclerosis and epilepsies as their principal clinical symptom were examined by conventional surface electroencephalography(EEG), computed tomography, and single photon emission computed tomography(SPECT) using the 99mTc hexamethyl prophyleneamine oxime(99mTc-HMPAO). The interictal EEG showed various abnormalities of poor localizing value. Brain computed tomography surely demonstrated subependymal calcifications, although the cortical lesions were not so conspicuous. However, the SPECT images of each patient clearly demonstrated decreased cerebral perfusion in cortical areas. It may be assumed that such perfusion defect areas represent the epileptic cortical tubers or those of altered myelination, which are characteristics of the disease.

기포탑 내의 중금속 수용액에 대한 기-액접촉면적과 물질전달에 관한 연구

한승완,김상렬,윤영웅 東亞大學校 1992 東亞論叢 Vol.29 No.1

기포탑 내에서 중금속 수용액에 대한 기체 체류량, 기포경, 기-액 계면적 및 액상 용량물질 전달계수를 용액의 물성과 분산판의 종류에 따라 실험하였다. 기체 체류량, 기-액 계면적 및 액상 용량 물질 전달계수는 기체 속도와 용액의 농도가 증가함에 따라 증가하는 경향을 보였다. 기포경은 용액의 농도가 증가하면 감소하였고 기-액 계면적과 기체 체류량 사이에는 직선 관계를 나타내었으며, 기체 체류량과 액상용량물질전달계수에 대한 새로운 무차원식을 구하였다. In the experiment of heavy metal solution in the bubble column, gas hold up, bubble diameter, gas liquid interface area and volumetric liquid phase mass transfer coefficient are measured according to liquid properties and various perforated plates. Gas hold up and gas liquid interface area increase as the gas velocity and liquid concentration increase. Bubble diameters decrease as the liquid concentra-tions increase. The gas liquid interface areas are directly proportional to the gas hold up. The new dimensionless correlations of gas hold up and the volumetric mass transfer coefficients are obtained.

키토산에 대한 Itaconic acid의 graft 공중합과 그 특성

한상문,윤충수,김용범 서울산업대학교 산업대학원 1999 大學院論文集 Vol.6 No.-

Chitosan was prepared from chitin which was abstracted from wasted crab shell. Then itaconic acid was graft-copolymerized onto chitosan using ceric ammonium nitrate(CAN) as a reaction initiator. To investigate the optimal grafting conditions, the influences of several factors on the grafting were studied, i.e., the concentrations of CAN and itaconic acid, the reaction temperature and time. And to find out its flocculation ability, the flocculation test was carried out with a metal plating factory waste water. The state of the graft-copolymer was identified through IR spectra checking. The optimal grafting conditions and flocculation results were shown to be: concentration of ceric ammonium nitrate is ??, reaction temperature is 40℃ and reaction time is 4hrs with 0.25M of the monomer(itaconic acid). Through flocculation tests using chitosan, grafted chitosan(CsIa) and cation, CODcr, metal ions removal rates were measured. The order of superiority is CsIa>Cs>Cation.

테헤란로 高層事務所 建物 저층부의 公共空間에 관한 연구

윤한섭,김성홍 대한건축학회 2003 대한건축학회논문집 Vol.19 No.3

This paper discusses the public space of the high-rise office buildings on Teheranno street. Since the 1980s, there has been a rapid growth in the construction of high-rise buildings due to the development of architectural technology and the increase of land price along this street. The ground level of high-rise office building is the buffer space between private and public realm and its roles in urban space becomes considerable. Nine buildings between Samsung and Kangnam subway station were chosen and classified according to their site areas and their relationships to the adjacent streets. Three aspects were primarily analyzed and interpreted. 1) the ratio of the public space and site area, 2) the programs of the ground level, 3) the spatial accessibility and permeability between buildings and streets. The paper reports that the buildings generally meet the legal requirements, yet their functions as public space were limited, and argues the importance of the linkage between urban and architectural design.

공공분야 정보시스템의 평가기준 및 방법에 관한 연구 : ExMan의 사례분석

한상연 경희대학교 사회과학대학 1992 社會 科學 論叢 Vol.10 No.-

지역개발 NGO의 현황과 발전방안

한상연,양기근 경희대학교 사회과학대학 2000 社會 科學 論叢 Vol.18 No.-

순천향대학교 학생들의 거주형태별 환경, 보건 및 복지실태

한성현,송라윤,한동우 순천향대학교 사회과학연구소 1998 순천향 사회과학연구 Vol.3 No.2

Three major factors influencing students' general well-being of school life were investigated: environmental, health, and welfare. A Survey was conveyed among all attending students of Soonchunhyang University by a structured questionnaire method to which was follwed by a complementary survey to explore and identify the housing situation of school area residents by the trained interviewers. Respondents tended to show relatively low degree of satisfaction regarding almost items regarding environmental and welfare conditions adressed. Residence types were significantly related to three factors. Research results suggest that more programs to meet the students' needs of environmental, health, and welfare services and facilities be provided.

國民學校 兒童의 姿勢計測에 對한 硏究

尹南植,韓成一,成丁順 梨花女子大學校 韓國生活科學硏究院 1977 韓國生活科學硏究院 論叢 Vol.18 No.-

국민학교 어린이들의 자세의 諸特性을 分析하여 學校現場에서의 자세교육의 지도자료를 구하는데 연구 목적이 있다. 서울, 경기지방의 남녀 어린이 240명에 대하여 척주 만곡도, 下肢의 상태 등을 계측하여 分析檢討한 結果를 다음과 같이 要約할 수 있다. (1) 연구대상자의 신체 형태의 특징은 細長型인데, 약 28%의 어린이는 전에 병을 앓은 경험이 있고, 50∼60%의 영양 불량아가 있다. (2) 자세에 미치는 환경 요인은 不實한 傾向이 있지만 자세 지도나 자세에 대한 관심도는 비교적 높다. (3) 立位자세의 표준 前傾度는 남자 4˚∼+5˚, 여자 -3˚∼+3˚이다. (4) 흉추부의 표준 만곡도는 남자 3˚∼12˚, 여자 4˚∼12˚이다. (5) 표준 상배 후만각은 남자 155˚∼168˚, 여자 152˚∼166˚이고, 표준 요부전막각은 남녀 모두 152˚∼168˚이다. (6) o脚은 전체 어린이의 7%이고 x脚은 3%를 차지하고 있다. The purpose of this study was to obtain the materials on the posture education at school. The subjects chosen for this study were 240 children from the first to the sixth grades at the elementary schools located in Seoul and Kyong-Gi Province. The children were interviewed each to examine the posture structure, were measured the degrees of vertebrae curvatures and the structure of the lower limbs by the Cureton's conformatuer to find the characteristics of the posture. The results were: (1) The children were near to the type of ectomorph posture. About 28% of the children had previously suffered the serious diseases. The children of unbalanced diet were from 50% to 60% of the total number. (2) 45% of the children used the desks and chairs when they study, and 70% of them had their desks and chairs unfit to their body structures. (3) Under these unfavorable circumstances, the children showed, however, the higher enthusiasm for the posture education which is encouraging. (4) The average Angle ∠α of forward curvature in standing position was about -4˚∼+5˚ among boys and -3˚∼43˚ among girls. (5) The average angle ∠a' of verabrae curvature of the thoracic was 3˚∼12˚ among sboy and 4˚∼12˚ among girls. (6) The male with Kyphosis (hunch back) was about 155˚∼168˚, the female was 152˚∼166˚. The male and female with lordossis of lumber curvature was 152˚∼168˚. (7) The children of bowlegs (O type) and those of knock knees (x type) were 3% of the whole.