신경회로망에서 뉴런간의 연결도를 이용한 4백 배치 문제 해결 알고리즘

현해진,김덕주,강부식,이기태,임재윤 濟州大學校 工科大學 産業技術硏究所 1993 産業技術硏究報告 Vol.4 No.-

In this paper we have proposed a method for solving a four-coloring problem using adjusted information transmission between adjacent neurons in neural networks. These algorithms are based on McCclloch-Pitts binary neuron model neural networks. If a map shares n regions, a 4×n neural array is used to color a map of n regions where each neuron as a processing element performs it. By programming these algorithm by a C-language in IBM PC 486 DX and adapting it to various examples, we have showed the ability of our system. If one neuron is selected among four neurons, the strength of order three neurons is wakened. So, by transmitting the information of selected neuron, adjacent neurons cannot share the same color.

Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 Ⅱ : 5-축 가공에 관한 연구 A Study on the 5-Axis Machining

조현덕,정대일,윤문철,최두선,신보성,이응숙,董玉革 한국공작기계학회 2002 한국생산제조학회지 Vol.11 No.3

This study is continuous with the study 1 (A Study on the Modeling) and the sample impeller of this study is defined by the modeling process of the exclusive CAD/CAM system developed in the study I. And, this study describes a method for the 5-axis machining of impeller blades formed by ruled surface. Therefore, the exclusive CAD/CAM system is the software for modeling and machining of impeller blades. By using the machining method suggested in this study, we could manufacture impeller blades on 5-axis CNC machining center and the machined impeller was very agreeable to the designed impeller. Thus, theories proposed in this study can be very useful for the 5-axis machining of impeller blades.

창원시 농촌지역 간이상수도 오염실태 조사

김승현,이덕희 경남대학교 환경문제연구소 1997 환경연구 Vol.19 No.-

Contamination of small water systems at rural areas of Changwon city was investigated in this study. The results of this study showed that the KDWQS compliance rate by small water systems in the study area was better than national average, but worse than the US average. Microbial standards were more frequently violated than any other standard. However, small water systems in the ,study area were found to be relatively less contaminated than groundwaters in other areas of Korea. No heavy metal was detected in small water systems in the study area. 4 % and 1 % of small water systems in the study area violated the NO₃-N and F^(-) standards. NO₃-N was found to be closely related to the planting area. No organic standard was violated and no pesticide/herbicide was detected. A few VOC (TCE, bensene, toluene, ethylbenzene) were detected, but their concentrations were low.

중독한 추체로 증상을 보인 cyclosporine에 의한 뇌증 1예

강정현,곽승근,신현영,김성은,이정호,이정찬,곽상혁,윤환중,조덕연,김삼용,김제,송창준 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.1

The use of cyclosporine(CsA), a potent immunosuppressive agent, is associated with numerous side effects. Neurotoxicity was earlier less well known, but with growing experience central nervous system side effects are now reported up to 40% of patients. Among various CsA-induced neurotoxicities, tremor is most common and posterior leukoencephalopathy is well characterized. An encephalopathy presenting with pyramidal weakness, however, seems to be rare and poorly documented. We report here a case of encephalopathy presenting with multiple generalized seizures followed by fluctuating quadriparesis developed a few days after starting CsA and resolved spontaneously after withdrawal of the drug . A 48-year-old woman with aplastic anemia was placed upon immmunosuppressive treatment consisting of antithymocyte globulin(ATG), CsA, and methylprednisolone. Two days after starting the therapy, she developed a generalized seizure. The next day she developed 2 more episodes of seizure and the therapy was stopped. Computed tomogram of the brain was normal. Six days after starting therapy, she developed mild motor weakness and paresthesia of both lower extremities, which progressed to a definite quariparesis confining her to a bed in 3 days. Magnetic resonance imaging(MRI) of the brain revealed asymmetric, bilateral high-signal abnormalites in the subcortical white matter of fronto-temporal areas. After reaching to a maximum with some fluactuation(14 days after starting the therapy) the motor weakness started to be resolved. She was discharged with a almost complete resolution of the weakness 45 days after starting the therapy. Five months later she did well and brain MRI was negative.

복합용도지구의 유형구분과 계획특성 연구

오덕성,이응현 충남대학교 공공문제연구소 2006 공공문제와 정책 Vol.18 No.-

TFM 방식을 이용한 건물의 동적 열성능해석 기법 연구(Ⅰ)

구현덕,이순화,이진숙,송인춘 忠南大學校 産業技術硏究所 1993 산업기술연구논문집 Vol.8 No.1

This study presents the methodology application of hour-by-hour computation for an extensive analysis in building. The approach to equipment selection based on air-conditioning equipment and air distribution systems with sufficient capacity to cope with maximum design load evolved when all design calculations were performed manually. At that time, extensive design analysis was impractical: now, computers, used frequently for rountine design calculations, make anaysis practical. Consequently, this study describes the fundamental methodology used in calculating a space load and gives basic equations for determining hour-by-hour load factors given in tabular forms in the ASHRAE FUNDAMENTALS, 1985 and 1989. It is possible to construct computerized routines to duplicate results obtained with the tabular data, and to examine the effect of various systems and operating schedules on the space energy analysis. This study deals with fundamental calculation procedures for 1. Heat gain through exterior walls and roofs using transfer function coefficients. 2. Hrat gain through interior patitions, ceilings and floors using transfer function coefficients. 3. Conversion of all heat gain components into appropriate room/space loads. 4. Extention of the procedures to calculate the space air temperature and heat extraction rate obtained with a particular type and size of terminal unit. By applicating this procedures to computerization, three basical calcualtion routines are made and verified as the proper simulation methodology. As results. 1. Houry conduction rate has only 0.48% err in average. 2. Houry radiation rate has only 0.041% err in average. 3. Houry temperature variation has only 0.001% err in average. 4. Houry predicted heat extration rate has only 0.005% err in average. From the above results, it is possible to use TFM computerization methodology for energy analysis in building. By applicating three basical comuper calculations, more complicate computer simulation can be interpreted to be needed for annual energy analysis.

Ruled Surface로 형성된 임펠러 블레이드 전용 CAD/CAM 시스템 개발 Ⅰ : 모델링에 관한 연구 A Study on the Modeling

조현덕,정대일,윤문철,최두선,신보성,이응숙,董玉革 한국공작기계학회 2001 한국생산제조학회지 Vol.10 No.6

We have developed the exclusive CAD/CAM system for the machining of impeller blades. This study is about the modeling method for the effective machining of impeller blades formed by ruled surface. As the impeller is consisted of boss part and blade part, the boss is modeled by rotational surface of hub curve on z-axis and the blade is described by ruled-surfaces between hub curve and shroud curve. This modeling process can be carried out on the software developed in this study. And, the developed software can describe the impeller as a solid model through interface with Solid-Works software. The developed software containing the interface method proposed in this study was very effective for impeller modeling.

단기간의 저용량 Cytosine arabinoside 치료에 반응하였던 Down 증후군에 병발한 급성골수성백혈병 1례

김현수,이정호,이정찬,강정현,곽상혁,김철희,배광봉,김종숙,조덕연,김삼용 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

The incidence of hematologic disorders in patients with Down's syndrome is significantly increased, about 14∼30 - fold higher than in general population and includes neonatal transient abnormal myelopoieis and acute leukemias. The age of onset of leukemia in Down's syndrome is peaking first in the newborn period and then under 4 years of age. Down's syndrome with acute leukemia above the age of 20 is very rare and it's treatment oucome is unclear. The treatment of Down's syndrome with leukemia has been controversial because of toxicity and associated congenital cardiac and other abnormalities. But if treated adequately, children with Down's syndrome show a favorable response to anti-leukemia therapy. A 24-year-old man with Down's syndrome was first seen for the evaluation of anemia and thrombocytopenia. The peripheral blood morphology and bone marrow study revealed acute myelogenous leukemia, cytogenetic study of bone marrow showed trisomy 21. Beacuse of his sicioeconomic condition and medical abnormalities including deafness, visual loss, he was treated with low dose subcutaneous cytosine arabinoside(Ara-C) for 11 days. Complete remission was obtained after 37 days. The complete remission lasted for 5 months. He subsequently relapsed, and died 6 months later.

간접접착술식에서 접착제의 종류에 따른 전단결합강도와 파절 양상

장문주,이대희,김현덕,전영미,김정기 大韓齒科器材學會 2001 대한치과재료학회지 Vol.28 No.4

The purpose of this study was to compare the shear bond strength and failure type of various adhesives in indirect bonding technique. Five types of orthodontic bonding adhesives - ES(Excel sealant), EP(Excel paste), EA(sealant and past), T(Transbond XT sealant), L(Light bond sealant) - were used in this study. Metal bars(70×7×7㎜) were milled and sand-blasted with 50㎛ alumina and then coated with resin. resin blocks(3×4×5㎜) were made and bonded to the resin-coated metal bars with various adhesives. Shear bond strengths were measured by an universal testing machine. The film thickness, interface region. Self-curing resin, EX(Excel sealant) showed the greatest shear bond strength(22.82±3.05 ㎫) and self-curing resin, EP(Excel paste) showed the lowest shear bond strength(13.91±2.70 ㎫). The shear bond strength of self-curing resin, EA(sealant and past : 20.94±0.92 ㎫) was similar to those of light-curing resins, T(Transbond XT sealant : 20.90±2.34 ㎫), L(Light bond sealant : 18.12±1.63 ㎫) group. Most of the failure occurred between the resin coated metal bars and sealant regardless of the adhesives.

중증 재생불량성 빈혈 환자에서 신우신염에 대한 광범위항생제치료 중에 속발한 Saccharomyces cerevisiae 진균감염 1예

김철희,이정호,이정찬,강정현,곽상혁,배광봉,김현수,김종숙,조덕연,김삼용 충남대학교 의과대학 지역사회의학연구소 1999 충남의대잡지 Vol.26 No.1

Most patients with aplastic anemia who do not respond to immunosuppressive treatment or are not candidates for bone marrow transplantation die of infection or bleeding. The neutropenia in acute leukemia, aplastic anemia, or occurring subsequently to chemotherapy and bone marrow transplantation increases susceptibility to infection. In general, the number of infectious episodes correlate with the degree and duration of neutropenia. Global immunosuppression produced by conditioning for bone marrow transplantation or graft-versus-host disease, is associated with unusual bacterial and fungal pathogens, or serious viral and protozoan infections. In addition, repeated treatment with broad-spectrum antibiotics is associated with the emergence of resistant organisms and fungal diseases because of the altered microbial microenvironment of the host. The incidence of invasive fungal infection caused by Saccharomycetes eerevisiae in immunosuppressed patients is very rare, compared with that of infection by candida or aspcrgillus species. Cases of Saccharomycetes cerevisiae fungemia occurring in the course of treatment with broad-spectrum antibiotics are reported in patients with extensive burn or with prosthetic valve endocarditis. We experienced a case of urinary tract infection by Saccharomycetes cerevisiae in a 27-year old female patient with severe aplastic anemia. We report the case with a review of relevant literatures.