췌장염에 의한 가성낭종내에 생긴 가성동맥류 : 1례 보고

오연희,이채경,김승현,이성우,양창현,이정호,이영현 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

만성 췌장염의 합병증으로 생긴 가성동맥류는 드문질환으로, 반복적으로 다량의 출혈을 일으킬 수 있으며, 치료를 하지 않을 경우 사망율이 높기 때문에, 조기 진단과 치료가 필수적이다. 저자들은 38세 남자 환자에서 췌장염의 합병증으로 생긴 가성낭종내에서 발생한 가성동맥류 1예를 경험하였기에 보고하는 바이다. 가성 동맥류의 색혈류도플러상 낭종내에 양방향 흐름의 와류를 볼 수 있었다. Pancreatic Pseudoaneurysm within Pseudocyst from Pancreatitis: 1 Case Department of Diagnostic Radiology and Internal Medicine, College of Medicine,DongGuk University Yeon Hee OH M.D., Chae Kyeong Lee M.D., Seoung Hyeon Kim M.D., Sung Woo Lee M.D., Chang Heon Yang M.D., Jung Ho Lee M.D., Young Hyun Lee M.D. Pseudoaneurysm from pancreatitis is uncommon, but it can cause recurrent and massive hemorrhage. Because of high morbidity and mortality, early detection and treatment of the pseudoaneurysm is needed. We report a case of pseudoaneurysm within pseudocyst from pancreatitis. Color-flow Doppler sonography shows bidirectional flow and turbulent arterial flow, within anechoic mass.

ATM 망에서 Best Effort와 Guaranteed 버스트 서비스 클래스에 대한 폭주제어 방식

이우승,문규춘,박광채 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.1

In ATM networks, we must distribute the bandwidth to use efficiently the channel and to satisfy the communication QoS(Qua1ity of Service) of traffics. However, since the required communication QoS is different according to traffics, it is expected that the congestion control scheme is improved by assigning priorities in each traffic and by controlling the priority. In this paper, congestion control schemes using the adaptive rate control for ATM LANs are presented. It is preferable for hosts in LANs to be able to send bursts at the same speed as the interface link speed in a lightly loaded condition, and as the network load increases, to reduce their traffic rate adaptively in order to avoid network congestion. We propose to apply such a rate control concept for two different traffic classed in the ATM LANs. For the first traffic class requiring no bandwidth reservation, i.e, a best effort service class, a combination of the end-to-end adaptive peak rate control with the link-by-link backpressure control is proposed. For the second traffic class, requiring the bandwidth reservation for the burst transmission, i.e. a guaranteed burst service class, a combination of the adaptive peak rate control with the fast bandwidth reservation is proposed.

[1.1.1.1]Paddlane과 할로겐 화합물과의 반응

李愚鵬,吳東元,黃悳海,權明淑,鄭宰準 慶北大學校 師範大學 科學敎育硏究所 2002 科學敎育硏究誌 Vol.26 No.-

[1.1.1]Paddlane has an inverted structure at two bridge-head carbon atoms. We will describe the reaction of [1.1.1]Paddlane and [1.1.1.1]Paddlane. The reaction of [1.1.1]propellane with singlet methylene affored 1,3-Dimethylene as the major product and [1.1.1.1]paddlane as the minor products were obtained. The reaction of [1.1.1]propellane with triplet methylene was carried out in the similar conditions. The result afforded 1,3-Dimethylenecylopropane as the major product and various side products were also obtained. But no trace of [1.1.1.1]paddlane was detected. After the synthesis of [1.1.1.1]paddlane, continuously [1.1.1.1]paddlane reacts with iodide. The product that I expected for 1,3-diiodo-tricyclo[1.1.1.1]hexane is different. and has unsymmetrical structure.

도트 패턴 데이터베이스를 이용한 모델 기반 칼라 영상 중간조 처리 방법

이채수,박양우,장주석 경운대학교 산업기술연구소 1999 産業技術硏究論文誌 Vol.2 No.1

Model-based color image halftoning method using dot-pattern databases is proposed for low-resolution color image halftoning. The proposed algorithm has benefits of simple processing, less computational time of the ordered dither and benefits of aperiodic, uncorrelated structure without low-frequency graininess of the blue noise masking. The dot-pattern is defined as a part divided from a dot-profile, which is the binary pattern resulting from the halftoning of a constant gray level. In halftoning procedure, in order to improve the visual quality of the color halftoning, contrast sensitivity function (CSF) of human visual system is used. Using this CSF, the visual difference between original image and halftoned image can be computed as numerical value. Therefore, optimal dot-pattern can be selected from the database.

외국인 투자유치 마케팅전략에 관한 연구

李愚採,金炳先 강남대학교 사회과학연구소 2000 사회과학논총 Vol.9 No.-

In the late 1990s, Korean firms, stimulated by Asian financial crisis that took place in 1997, undertook internal restructuring that caused a decline of direct investment in Europe during the period.Korean firms that have finished internal restructuring are expected to resume their expansion strategy in the early 2000s. The objectives of the study are: 1) to develop a framework for identifying the most promising Korean firms for the A Country inward foreign direct investment; 2) to select Korean manufacturing and service firms that have strong potential to invest in the A Country within three to five years of time frame; 3) to provide marketing ideas to approach these Korean firms effectively and to speed up the actual investment decisions

大邱地域住民의 生活體育 實態分析 : 早起運動參與度를 中心으로 Focusing on participation degree of populations exercising in the morning

蔡鴻遠,金柄斗,李敏炯,金基學,朴宇奎 慶北大學校 體育科學硏究所 1991 체육과학연구지 Vol.7 No.-

The purpose of this study is to get the source materials to activate mass sports of regional populations. At first, it was by sex, age, and occupations examined and analysed populations that would participate in physical activities from 5 to 8 Am at 28 pate-up mountains and 477 workplaces, schools, public facilities, and commercial facilities sontrolled by 7 district offices in Daegu. The mothod of investigation made a preliminary inquiry in advance and set in place 70 investigators in entrance of path-up mountains and sports facilities. Especially, the occupational classification was adopted from socilolgical job calssification model and every result value of analysis was dealed and compared with percentage by means of Daewoo Corona 286 PC. Accordiangly, the concrete conclusions are summarized as follows : 1) The total number of persons participating in mass sports in the morning is 18,045(men 10,850 : 59%, women 7,465 : 41%), and it is about 1% level by the rate of population and low participation rate in comparison with advanced nations. ① It is showed that the participation value in proportion to sex is 17.4% more in men's case taking 10,587 persons(58.7%) than 7,458 persons(41.3%) in women's case. ② Taking the dimensions of participation degree in proportion to age, it is taken the most value in fifties age with 5,092 persons (28%), showing in sixties, forties, thirties, twenties age in sequence. ③ Taking the dimensions of participation degree in proportion to occupation, it is taken the most value in housewife with 5,569 persons (31%), showing the unemployed, independent enterprise, technical expert, clerical work, deministrative position, student, technical work, manual labor, agriculture and forestry, and fishery in sequence. 2) Judging from the participation degree in proportion to district office, it is taken the most value in Mam-gu with 3,821 persons(21.2%) and Dalseo-gu with 3,776 persons(20.9%) and the least in Joong-gu with 1,612 persons(8.9) and Seo-gu with 1,589 persons(8.8%). It is assumed that low participation value in Joong-gu and Seo-gu should result from deficient facilities and close space of urban.

Spin-Peierls 전이를 하는 CuGeO₃계의 이온 치환 효과

이영배,채광표,권우현,백서욱,이성호 건국대학교 자연과학연구소 1998 建國自然科學硏究誌 Vol.9 No.1

Spin-Peierls 전이를 하는 CuGeO₃계에 원소를 치환했을 때의 자기적 및 결정학적 특성을 비교 검토하고, 직접 Cu₁-xGe₁-xFe₂O₃(x=0.05, 0.1) 시료를 제조하여 SQUID, Mssbauer 분광기, X-선 회절 방법으로 연구하였다. 이 시료의 결정구조는 orthorhombic 이고 격자 상수는 x= 0.05 때 a = 4.795Å, b=8.472Å, c=2.904Å 이고 x=0.1때는 a=4.784Å, b=8.472Å, c=2.904Å였다. 상온에서 Mssbauer 스펙트럼은 Fe³+ 이온의 사면체 자리에 의한 이중선과 팔면체 자리에 의한 Zeeman 선으로 중첩되어 나타났고 자기감수율의 극대점과 Mssbauer 변수의 불연속으로부터 본 시료의 spin-Peierls 전이 온도는 13K 임을 알아냈다. The magnetic and crystallograpic properties of the substituted spin-Peierls transition CuGeO₃ system have been reviewed, and we synthesized the Cu₁-xGe₁-xFe₂xO₃ (x=0.05 and x=0.1) system and studied by superconducting quantum interference device, Mossbauer spectrometer and x-ray diffractometer. The crystal structure is orthorhombic and the lattice constants are decreased as increasing iron contents. That is, in Cu₁-xGe₁-xFe₂xO₃ system a=4.795Å, b=8.472Å and c=2.932Å for x=0.05, and a=4.784Å, b=8.472Å and c=2.904Å for x=0.1 respectively. The Mossbauer spectra are superposition of the doublet due to the Fe³+ ions at tetrahedral sites and the sextet due to the Fe³+ ions at octahedral sites at room temperature. From the cusp of the magnetic susceptibility and the discontinuity of Mossbauer parameters we found the spin-Peierls transition temperature of our samples is 13K.

국제통상환경 변화에 따른 각국의 통상정책 비교연구 : 미국, EU, 일본, 한국을 중심으로

李愚採,金孝仙 강남대학교 사회과학연구소 2000 사회과학논총 Vol.9 No.-

WTO 출범에 따라 글로벌화가 가속화되고 있고, EU, NAFTA 등 지역주의의 확산에 따른 지역주의화와 글로벌화가 병존하는 시대에 있어 각국의 통상정책 또한 변화가 심한 실정이다.이러한 통상환경 아래 정부나 기업은 적절한 대안을 마련해야 할 시점에 와있다.통상환경변화에 따른 적절한 통상정책을 구사하기 위해서는 선진국, 특히 미국, EU 그리고 일본의 관련 통상정책 및 제도의 이해와 연구가 필요하다. 본 연구결과 미국과 EU는 공격적인 통상정책을 실시하고 있는데 반하여, 일본은 이중적 통상정책 펴고있는 바 선진국에 대해서는 방어적이며, 신흥공업국에 대해서는 공격적인 면을 나타내고 있다.한편 한국은 대체적으로 방어적인 통상정책의 특징을 보여주고 있다.앞으로 한국정부의 통상정책은 새로운 의제로 부각되고 있는 무역과 투자, 무역과 경쟁정책 분야에서도 국제적인 규범을 세우는 일이야말로 관심을 기울여야 한다.

한국개비자(Cephalotaxus koreana)의 Harringtonine 과 Homoharringtonine에 관한 연구

이연,박두천,박호일,주우홍,이현채,신동수 昌原大學校 基礎科學硏究所 1996 基礎科學硏究所論文集 Vol.8 No.-

한국산 개비자로부터 alkaloid계통의 성분인 harringtonine과 homoharringtonine의 혼합물을 추출하여 한국산 개비자의 잎, 줄기, 뿌리에서의 harringtonine과 homoharringtonine의 함량은 고속 액체 크래마토그래피에 의해 결정하였다. 두물질의 함량은 서식지, 식물의 부위에 따라 상이하였다. Harringtonine의 함량은 줄기보다 잎과 뿌리에서 높았고, homoharringtonine의 함량은 harringtonin 함량보다 낮았다. 팔공산, 덕유산, 백양산, 지리산 및 남해에서의 잎의 homoharringtonine 함량은 줄기와 뿌리에서 높게 나왔으며, 조계산과 진도에서는 잎의 함량이 뿌리와 줄기에서 보다 낮았다. Harringtonine and homoharringtonine known as anti-cancer agents were isolated from Korean native plumyew (Cephalotaxus koreana). The contents of harringtonine and homoharringtonine in the needles, stems, and roots of Korean native plumyew were determined by high performance liquid chromatography (HPLC). The contents of both compounds varied with the site of location and the part of plant. The content of harringtonine was higher in needles and roots than in stems, whereas the content of homoharringtonine was lower than harringtonine. Homoharringtonine contents in needles at Mt. Palgong, Mt. Dukyu, Mt. Baekyang, Mt. Jiri, and Namhae were higher than in stems and roots. But homoharringtonine contents in needles at Mt. Jokye and Jindo were lower than in stems and roots.

자연적 재현을 위한 가변 닻점을 이용한 색역 사상

이채수,박양우 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(B)

In this paper, new gamut-mapping algorithm (GMA) that utilizes variable anchor points (center of gravity on the luminance axis) is proposed. The proposed algorithm increases luminance range, which is reduced from conventional gamut mapping toward an anchor point. In this process, this algorithm utilizes multiple anchor point with constant slopes to both reduce a sudden color change on the gamut boundary of the printer and to maintain a uniform color change during the mapping process. Accordingly, the proposed algorithm can reproduce high quality images with low-cost color devices.