• 경영과학
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• 제7권2호
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• pp.77-88
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• 1990

Operational Research (OR) is little in Bangladesh in either the academic or the business areas. However, some OR studies have been carried out in Bangladesh. These studies are scattered in various journals and documents and are not all easily accessible. In this paper an attempt has been made to bring together some of them.

• Journal of the Korean Data and Information Science Society
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• 제17권3호
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• pp.811-820
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• 2006

We introduce a program that enhances the interest and understanding of students in Statistics. This program explains various statistical concepts and procedures by showing detailed steps of calculations with graphs and simulations. This program utilizes a readily accessible Excel VBA.

• 대한설비공학회지:설비저널
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• 제32권5호
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• pp.27-38
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• 2003

• 한국자동차공학회논문집
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• 제12권2호
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• pp.32-38
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• 2004

This study was performed to investigate the behavior of liquid and vapor phase of fuel mixtures with different piston cavity diameters in a optically accessible engine. The conventional engine was modified as Central Injected DI gasoline engine with swirl motion. Two dimensional spray fluorescence images of liquid and vapor phase were acquired to analyze spray behavior and fuel distribution inside of cylinder using exciplex fluorescence method. Piston cavity geometries were set by Type S, M and L. The results obtained are as follows. In the spray formation after SOI, the cone angle and width of the spray were decreased at late injection timing. With a fuel injection timing of BTDC $180^{\circ}C$, fuel was not greatly affected in a piston cavity but generally distributed as homogeneous mixture in the cylinder. With a fuel injection timings of BTDC $90{\circ}C$ and $60^{\circ}C$, fuel mixture was widely distributed in near the cavity center. As a injection timing was late in the compression stroke, residual width of fuel mixture was narrow in proportion to piston cavity.

• 한국정보통신학회논문지
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• 제14권3호
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• pp.595-602
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• 2010

EMR(Electronic Medical Record)이란 종이문서 방식을 사용하는 의료차트 대신에 모니터로 출력되는 형식의 의료차트를 말한다. 현재 통용되는 EMR은 전문 의료인이 전문적인 용어 써놓은 양식이기 때문에, 그 의료기록의 실제 주인인 환자는 의료인의 부가적인 설명 없이는 자신의 자세한 증세는 물론 병명조차 정확히 확인하기 힘들다. 이에 환자에게 있어 매우 시간 소모적이고 노동집약적인 과정으로 환자가 의료인을 거쳐서 자신의 의료정보를 얻는 방식보다는 환자가 직접 그 정보를 얻는 방식이 필요하다. 따라서 본 연구는 EMR이 갖는 이러한 문제를 해결하기 위해 환자가 의료인을 거치지 않고 직접 자신의 의료정보를 얻기 위한 환자 접근행 EMR 응용 시스템의 비즈니스 모델을 제시한다.

• Bulletin of the Korean Chemical Society
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• 제33권3호
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• pp.779-789
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• 2012

In the kinetic theory of dense fluids the many-particle collision bracket integral is given in terms of a classical collision operator defined in the phase space. To find an algorithm to compute the collision bracket integrals, we revisit the eigenvalue problem of the Liouville operator and re-examine the method previously reported [Chem. Phys. 1977, 20, 93]. Then we apply the notion and concept of the eigenfunctions of the Liouville operator and knowledge acquired in the study of the eigenfunctions to cast collision bracket integrals into more convenient and suitable forms for numerical simulations. One of the alternative forms is given in the form of time correlation function. This form, on a further manipulation, assumes a form reminiscent of the Chapman- Enskog collision bracket integrals, but for dense gases and liquids as well as solids. In the dilute gas limit it would give rise precisely to the Chapman-Enskog collision bracket integrals for two-particle collision. The alternative forms obtained are more readily amenable to numerical simulation methods than the collision bracket integrals expressed in terms of a classical collision operator, which requires solution of classical Lippmann-Schwinger integral equations. This way, the aforementioned kinetic theory of dense fluids is made fully accessible by numerical computation/simulation methods, and the transport coefficients thereof are made computationally as accessible as those in the linear response theory.

• 정보관리학회지
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• 제23권1호
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• pp.181-200
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• 2006

본 연구의 목적은 인용문헌에 나타난 웹 자원의 접근성과 그 변화추이를 분석하여 인용문헌에 수록된 웹 정보원의 가치와 유용성을 평가하는데 그 목적이 있다. 이를 위하여 정보관리학회지에 수록된 웹 자원 1,377건을 추출하여 국내, 국외별 웹 자원의 접근성과 도메인과 파일유형의 웹 자원 접근성 및 접근성 변화추이를 분석하였다. 그 결과 국내 웹 자원은 접근성비율이 40%, 국외 웹 자원은 50%, 도메인 유형은 58%, 파일 유형은 44%로 각각 조사되었다. 또한 인용시간 경과에 따른 웹 자원의 접근성은 감소하는 경향을 보였으며, 인용된지 1년 정도가 되면 웹 자원의 23%정도가 접근할 수 없는 것으로 밝혀져 웹 자원의 유용성은 매우 낮은 것으로 평가되었다.

• 한국자동차공학회논문집
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• 제9권5호
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• pp.96-104
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• 2001

The present study experimentally investigates the concentration distribution of liquid and vapor phase with different injection timings in the in-cylinder flow field of a optically accessible engine. The conventional MPI, DOHC engine was modified into DI gasoline engine. The images of liquid and vapor phases in the motoring engine were captured by using exciplex fluorescence method. Dopants used in this study were 2% fluorobenzene and 9% DEMA(diethyl-methyl-amino) in 89% solution of hexane by volume respectively. Two dimensional spray fluorescence images of liquid and vapor phases were acquired to analyze spray behaviors and fuel distribution in the in-cylinder flow field. Measurements were carried out fur four different injection timings, namely BTDC 270$^{\circ}$, 180$^{\circ}$, 90$^{\circ}$, and 50$^{\circ}$. Experimental results indicate that behaviors and distribution of vapor phase were largely affected by in-cylinder tumble flow, and mixture formation process was also greatly affected by in-cylinder flow at early injection mode and by ambient pressure at late injection mode.

• Journal of Chest Surgery
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• 제21권6호
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• pp.1111-1116
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• 1988

Neurofibromatosis is very rare syndrome characterized by abnormal cutaneous pigmentation and numerous skin tumors was described by Smith in 1849, which is inherited as an autosomal dominant trait. Von Recklinghausen reported 2 cases of multiple skin and subcutaneous tumors in 1982. Malignant peripheral nerve tumors, although generally rare, are one of the most characteristic malignant tumors associated with Neurofibromatosis. We have experienced 3 cases of malignant Schwannoma in neurofibroma patients from 1982 to 1988 for 6 years at Thoracic and Cardiovascular surgery department, College of Medicine, Yonsei University, Seoul, Korea. l. One is 62 years old female who was taken total hysterectomy followed by irradiation treatment due to Uterine Carcinoma 21 years ago. She had a large bulging mass on left anterior chest wall and was taken enbloc resection of tumor including rib confirmed malignant Schwannoma. 2. Another is 18 years old female who had large bulging mass on right chest wall and pleural effusion in right thoracic cavity. Thoracentesis revealed a large amount of lymphocytes misdiagnosed of Tbc, pleurisy with Neurofibromatosis. We performed tissue biopsy on bulging mass and the specimen was confirmed malignant Schwannoma 2 months after first diagnosis of Tbc. pleurisy. She was not accessible to radical resection because of far advanced malignant Schwannoma at that time. 3. Third case is 28 years old male who was taken enbloc resection of tumor including rib due to Neurofibroma with Neurofibromatosis at M. hospital 6 months ago. But he had rapid growing mass at operation site again and taken tissue biopsy confirmed of malignant Schwannoma. He was not accessible to enbloc resection due to malignant Schwannoma extending to mediastinal structures.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제9권2호
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• pp.51-58
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• 2003

The elements of a medium for gathering the able bodied and the disable bodied children are examined within the scope of this study. Starting from the importance of play for the children, the characteristics and the properties of middle childhood are chosen as domain. This study showed that though most of the playground sites were accessible to Physically disabled Children, and were safety. For Physically disabled Children, the opportunities to play in a play area depend largely on the accessibility of the facilities, this study also explored the play experience of children with disability. The play spaces and the playgrounds including the equipment are examined. The results of study suggest there be creatived planning items in terms of accessibility and domain, which, in detail, are summarized in following six points; Accessibility, Barrier-free, convenience, movement, safety, domain. A guideline on the design of an accessible & safety playground for Physically disabled Children should be made.