대형 스파스 메트릭스 선형방정식을 효율적으로 해석하는 씨스톨릭 어레이

이병홍,채수환,김정선 한국통신학회 1992 韓國通信學會論文誌 Vol.17 No.7

스트라이프 구조를 이용하여 대형 스파스 선형 방정식을 해석하는 CGM 반복 씨스톨릭 알고리즘을 제시하고, 이를 씨스톨릭 어레이로 구현했다. 메트릭스 A를 상삼각 행렬과 대각선행렬, 하삼각 행렬로 나누어서 이들이 별개의 선형 어레이에 의해서 병행적으로 실행되도록 했다. 따라서 1개의 선형 어레이를 사용했을 때보다도 실행시간이 대략 1/2로 단축되며, 스트라이프 구조를 이용하므로서 불규칙하게 분포된 스파스메트릭스의 연산을 효율적으로 할 수 있다. A CGM iterative systolic algorithm to solve large sparse linear systems of equations is presented. For implementation of the algorithm, a systolic array using the stripe structure is proposed. The matrix A is decomposed into a strictly lower triangular matrix, a diagonal matrix, and a strictly up-per triangular matrix, and the two formers and the tatter· are concurrently computed by different linear arrays. Hence, the execution time of this approach Is reduced to half of the execution time of the that a linear array is used. computation of the Irregularly distributed sparse matrix can be executed effectively by using the stripe structure.

소매산 줄임량에 대한 소재별 연구

李秉紅 배화여자대학 1993 培花論叢 Vol.11-12 No.-

In sleeve formation, it is required to consider the shrinkage of height of sleeve cap. Therefore, in order to provide the amount of shrinkage of sleeve cap height properly, this study will present a standard which considers the thickness and composition of fabrics. Also, by analysing many factors effecting on the shrinkage. It is possible to take appropriate amount of shrinkage depending on the fabrics to be used into consideration in pattern formation. The shrinkage of sleeve cap height appeared in the draft is culculated as 2.2㎝ in front and 1.98㎝ in back. The effects of composition of fabrics were not employed for this calculation. It is also showed that the thickness of fabrics has the strongest influence on the amount of shrinkage of sleeve cap height. As increase the thickness of fabric the shrinkage increases if the composition of fabrics is not considered. In order to study the effect of the composition of fabrics on the shrinkage and its relation-ship with thickness, 18 different kinds of fabrics were evaluated by using one pattern. The thickness and composition have complex effects on each other. This result was also supported by computer simulation.

Electron-transport Characteristics of Electrospun TiO₂ Electrodes in Dye-sensitized Solar Cells

이병홍,곽승엽,조성무,김동영 한국고분자학회 2007 한국고분자학회 학술대회 연구논문 초록집 Vol.2007 No.4

대형 스파스 메트릭스 선형방정식을 효율적으로 해석하는 병렬 알고리즘 ( Parallel algorithm to efficiently solve large sparse matrix linear systems of equations )

이병홍,김정선 한국통신학회 1992 한국통신학회 학술대회논문집 Vol.11 No.1

의복 구성시 CAD를 이용한 기본원형의 자동제도 및 무늬맞춤에 관한 연구

李秉紅 배화여자대학 1995 培花論叢 Vol.14 No.-

The automation of basic patter designs in making clothes and that of the making processes of the fabric with check-patterns have made possible the cost-reduction and work-efficiency. This study is on the problems involved in the working of cad system by the use of AM240 and SIL equipment which belong to the category of Apprael CAD system manufactured by the American brand of Gerber. The conclusions of this study are as follows. 1. The method of setting the patterns by using stylus pen of SIL equipment, which manufactures the life-size products,is the most efficient way of achieving the effect of hand-work exactly. 2. The automatic grading of the desirable size with basic patterns makes possible the saving of time and labour. 3. The automatic combination of the design in the cutting of the cloth even with the check-patterns makes possible the production of the high-value products. 4. The different settings only with the change of the size by the use of the Macro in the pattern production makes possible more efficient use of the automatic design of various sizes of patterns.

Block Cyclic Reduction 기법에 의한 대형 Sparse Matrix 선형 2계편미분방정식의 효율적인 병렬 해 알고리즘

이병홍,김정선 한국통신학회 1990 韓國通信學會論文誌 Vol.15 No.7

선계2계 편미분 방정식의 일반식에 대한 계수 메트릭스를 (n-1)x(n-1) submatrices로 나누어서 block tridiagonal system으로 변환한 후 cyclic odd-even reduction 기법을 응용하여 large-grain data granularity로서 미지벡타를 구하는 block cyclic reduction 알고리즘을 작성했다. 그런데 이 block cyclic reduction 기법은 매 연산의 단계마다 병렬성이 변하여 병렬처리형 컴퓨터에는 적합하지 못하므로 이 기법을 변형해서 병렬성이 일정하며 실행시간이 보다 단축되는 block cyclic reduction 기법을 제안하고 이 기법에 의한 선형2계 편미분 방정식의 일반식의 解를 구하는 알고리즘을 작성하여 기존의 기법과 비교 고찰했다. The co-efficient matrix of linear second-order partial differential equations in the general form is partitioned with (n-1)x(n-1) submartices and is transformed into the block tridiagonal system. Then the cyclic odd-even reduction technique is applied to this system with the large-grain data granularity and the block cyclic reduction algorithm to solve unknown vectors of this system is created. But this block cyclic reduction technique is not suitable for the parallel processing system because of its parallelism chanigng at every computing stages. So a new algorithm for solving linear second-order partical differential equations is presentes by the block cyclic reduction technique which is modified in order to keep its parallelism constant, and to reduce gteatly its execution time. Both of these algoriths are compared and studied.

Highly efficient dye-sensitized solar cells with binder-free TiO₂ sphere formed by electrospray technique

이병홍,김현주,장성연,조성무,김동영 한국고분자학회 2008 한국고분자학회 학술대회 연구논문 초록집 Vol.33 No.2

공용수용 보상만족도 향상방안에 관한 연구

이병홍,정성용 한국지적학회 2012 한국지적학회 학술대회 논문집 Vol.2012 No.3

일부 연구에서 피수용자를 대상으로 인구통계적 특성 또는 재산권보상 종류와 보상절차에 대한 만족도분석은 실시한 바 있으나, 보상금 수령이후 이주실태 및 보상금 수령 전후 전반에 대한 만족도분석은 피수용자와의 접촉 어려움 둥으로 언해 연구성과가 전무한 실정이다. 이에 본 연구에서는 피수용자의 보상저항 원인을 도출한 후 피수용자의 보상만족도 향상에 기여할 수 있는 방안을 제시하고자 한다. There are some studies conducted of a satisfaction analysis about demographic characteristics or kinds of property compensation and its procedures for recipients, but a research performance about overall satisfaction analysis of the relocation status before and after receiving compensation payment is nothing due to the difficulties of contact with recipients. Therefore this study aims to propose a way that can contribute to the improvement of recipients satisfaction after deriving from the cause of recipients resistance to the compensation.

慢性副鼻洞炎에 있어서 上顎洞骨壁의 病理에 關한 硏究 : 部位, 年齡, 性 및 罹患期問과의 關係 Relations among the Location, age, and duration of illness

李秉弘,申洪秀 고려대학교 의과대학 1985 고려대 의대 잡지 Vol.22 No.1

The bone of the paranasal sinuses which is covered by a thin mucosal wall has been thought to be frequently affected by the pathological changes of lining mucosae. The author examined histopathological changes and thickness of the bone, taken from anterior and medial walls of 37 cases of maxillary sinus during Caldwell-Luc operation for chronic paranasal sinusitis. The study on relations between histopathological changes of bone and mucosa and the other factors that were thought to be related to histopathological changes of the bone, such as location, age, sex, duration of illness, was performed. The obtained results are as follows : 1. The anterior (facial) bony walls revealed abnormal histopathological changes in 75.7%of the cases and medial walls revealed in 73.0%, and the most common type was ostoclastic. 2. The anterior bony wall was thicker than the medial bony wall, but the same portion of the anterior mucosa was thinner than that of the medial wall. 3. The thickness of the bony wail was the thinnest in osteoclastic type and the thickest in osteoblastic type. 4. The mucosal pathologic change seemed to be no definite relation with the type of bony change, and usually the most frequent change of the mucosal wall was atrophic type. 5. There were no correlations between the thickness of the bone and sinus mucosa. 6. In bilateral cases, these were similar bony changes between right and left bony walls, in about 50% of the cases. 7. There were similar bony changes between anterior and medial walls in about 70.3% of the cases. 8. Osteoclastic type in the bone seemed to be gradually increased with aging. 9. There seemed to be no sexual difference in histopathiologcal changes of the bone. 10. The longer duration of illness, osteoclastic bony change seemed to be increased.

재개발사업 재정착요인에 관한 연구

이병홍,한춘모 한국부동산경영학회 2020 부동산경영 Vol.21 No.-

재개발사업 원주민을 대상으로 재정착 의향에 관한 실증연구를 실시하였다. 첫째, 재정착 의향에 대한 교차분석 결과는 다음과 같다. 비경제적 요인에 해당하는 세대주의 연령이 낮을수록, 가구구성원 수가 많을수록, 거주 주택 보유기간이 짧을수록 재정착하겠다는 비율이 높게 나타났다. 이는 세대주의 연령이 높을수록, 1~2인 가구와 같이 가구구성원 수가 적은 고령층 가구구성원일수록, 주택 보유 기간이 긴 고령층일수록, 재개발사업에 따른 공동주택보다는 단독주택을 더 선호하는 결과 가 반영된 것이라 판단된다. 경제적 요인에 해당하는 월소득이 클수록, 보유자산이 많을수록, 다가구주택·아파트·상 가주택에 거주할수록, 거주주택 규모가 클수록, 거주주택 대지면적이 클수록 재정착하겠다 는 비율이 높게 나타났다. 이는 원주민의 경제적 자산규모가 클수록 추가분담금 납부에 대 한 부담보다는 저렴한 조합원 분양가에 따른 단기 시세차익과 주거환경 개선으로 인한 장 기 양도차익을 선택한 결과라 판단된다. 둘째, 재정착의향에 관한 로지스틱 회귀분석 결과는 다음과 같다. 가구특성 모형에서는 보유자산 규모, 주택특성 모형에서는 거주주택 보유기간, 거주주택 유형 변수가 다른 변수에 비해 재정착에 미치는 영향력이 큰 것으로 분석되었다. 그리고 원주민특성 모형에서는 가구주 연령, 가구주 월소득, 거주주택 유형, 거주주택 대지면적 변 수가 유의하게 나타났으며, 가구주 연령이 낮을수록, 가구주 월소득이 클수록, 감정평가 산 정금액이 높게 책정되는 다가구주택·아파트·상가주택에 거주할수록, 거주주택 대지면적이 클수록 원주민의 재정착에 긍정적인 영향을 미치는 것으로 분석되었다. 본 연구는 재개발사업 재정착률이 조합원의 추가분담금에 전적으로 좌우된다는 사실을 재확인하였다. An empirical study on the intention of resettlement was conducted for original inhabitant of the redevelopment project. First, the results of the cross-analysis of the intent of resettlement are as follows. The lower the age of household owners, the higher the number of household members, and the shorter the period of housing ownership, the higher the percentage of resettlement. This reflects the result that the higher the age of the household owner, the lower the number of household members, the older the household members such as one or two people, and the longer the housing period, the more likely the older the household members prefer single-family houses to apartments according to redevelopment projects. The higher the monthly income, the higher the assets held, the greater the number of multi-family houses, apartments, and commercial houses, the larger the size of residential houses, and the larger the area of residential housing, the higher the rate of resettlement. This is believed to be the result of choosing short-term capital gains from the sale price of the members and long-term capital gains from the improvement of the residential environment rather than the burden of paying additional contributions to the greater the economic assets of original inhabitant. Second, logistic regression results regarding the intention of resettlement are as follows. In the household characteristics model, the size of the assets and in the housing characteristics model, the length of residence and the type of residential housing had a greater influence on resettlement than other variables. And in the original inhabitant characteristic model, the variables of the household owner's age, the monthly income of the household owner, the type of residential housing, and the land area of the residential house were significant, and the lower the household owner's age, the greater the monthly income of the household owner, the higher the appraised value, the greater the greater the residential housing site, the more the positive the resettlement of original inhabitant. This study reaffirmed that the resettlement rate of redevelopment projects depends entirely on the additional share of expense of redevelopment syndicate members.