Ki-1 임파종 1 예

김용진,김경재,박재복,이지현,안기성,강민모,최석문,황기석 대한내과학회 1993 대한내과학회지 Vol.45 No.4

A 60-year-old man was admitted to our hospital complaining of fever with chillness and anarexia for 12 weeks. Physical examination revealed supraclavicular lymphadenopathy and left inguinal lymphadenopathy. Abdominal CT scan showed the evidence of maked lymphadenopathy on retraperitoneal, external iliac, obturator, left inguinal, and celiac lymph nodes. A pathologic diagnosis of Ki-1(+) lymphoma was made by the biopsed supraclavicular lymph node because the node consisted of large cells with pleomorphic nuclei, scanty cytoplasm, large basophilic nucleoli, atypical vacuoli and large cells were positive for leukocyte common antigen, Ber-H2, marker, and B-cell marker.

最大閉鎖問題의 應用과 擴張

金基錫 釜山 大學校 經營 經濟 硏究所 1995 經營 經濟 硏究 Vol.14 No.1

본 논문은 네트워크상에서 정의되는 최대폐쇄문제의 다양한 응용분야를 제시하였으며, 또한 최대폐쇄문제의 확장에 관하여 논의하였다. 최대폐쇄문제의 응용분야로는, 군 공격목표의 파괴방법 최적화, 노천굴에서 채광할 블락군 결정, 의존적인 투자안들의 포트폴리오 결정, 만기일이 있는 경우의 일정계획 등의 직접적인 응용과 화물처리 터미널의 선정, 데이터베이스에서의 레코드 분할, 현장수선궤의 공구/예비부품 선정 등의 간접적인 응용을 제시하였다. 본 논문에서 다룬 최대폐쇄문제의 확장은 두 가지로서, 최대비율 폐쇄문제와 제약조건하의 최대 폐쇄문제이다. 이들 문제에 대한 해법으로 지금까지 알려진 것은 본문에서 소개하였으나, 앞으로 더욱 효율적인 해법의 개발이 요망된다. 특히 응용사례에 따라 네트워크의 구조가 달라지므로, 그 구조적 특성을 반영한 고유해법의 개발이 향후 연구과제의 하나이다.

反復作業을 갖는 Job shop 環境에서 Synchro-MRP 生産시스템의 設計

張錫株,朴炳基 全北大學校 1990 論文集 Vol.32 No.-

This paper was developed to use the powers of both MRP and JIT. we construct an "synchro-MRP production system" which advocates both the planning capabilities of MRP and the actual control of JIT. We show how the synchro-MRP production system may be adapted to the semirepetitive environment. Synchro-MRP works well in the environment of hige variety of Engineering change, many fabrication centers, and relatively low-volume usage of many parts. In this System, we can the expect the following effects in semirepetitive environment. (1) A pull system satisfying demands in FAS is realized (2) With the use of kanban and decision board. ⅰ) updating inventory status is fast and accurate, ii) demands for paper working is decreased, iii) work-in-process inventory and lead time is redused by controlling the number of kanban and lot size. (3) Production supervisors can control the production appropriately and surplus products and shortages of materials supply is prevented.

양성 갑상선 결절에서 티록신 억제 요법의 효과

윤석기,김철희,김영선,변동원,서교일,유명희 대한내분비학회 2000 Endocrinology and metabolism Vol.15 No.4·5

북한의 1990년대 경제위기와 기업지배구조의 변화

이석기 한국비교경제학회 2004 비교경제연구 Vol.11 No.1

The purpose of this paper is to analyze the changes of corporate governance of North Korean enterprises in conflicting situations during the 1990's when the official enterprise management system was maintained, albeit the material base of the centralized planning system was in reality destroyed due to extreme economic depression. The followings are main conclusions of this paper. First, throughout the planning process such as plan establishment, production, materials procurement, product disposal, and evaluation, 'Centralization (Ilwonhwa) and Details Description (sebuhwa) in planning' system has been weakened, and the substantial control of enterprises were enforced. Additionally, there was a lack of effective supervision by outsiders. In other words, insider control tendency arose in North Korea. While insiders of the USSR or China utilized the corporate control actively to pursue their profits, North Korean insiders use it passively al a mean of survival, so to speak the continuance of production. That is, insider control in North Korea can be considered as a 'Survival Pursuit Type' insider control, which is different from the USSR or China's 'Profit Pursuit Type' insider control. Since the official enterprise management system cannot guarantee reproduction, North Korean insiders tend to pursue survival through voluntary marketization. The marketization in the 1990's that did not accompany official changes of institution and currency economy led to the regressive marketization where the primary form of exchange was material for material. Second, as survival became a vital enterprise goal, corporate insiders showed extensive prearrangement to continue the production. During this process, managers' authority was relatively strengthened. In particular, the party secretary gave up innate supervision function for survival and allowed autonomy of the managers passively or conferred with managers actively. Not only managers but also directors who are responsible for production came to have bigger and stronger authority, which led to the partial decentralization of authority. As the distribution system has been destroyed, control of Government and Party on laborers has been weakened considerably and the relationship between enterprises and laborers encountered change. As enterprises are responsible for the living of laborers, laborers were likely to establish relationships directly with enterprises, not through government. Adversely, enterprises are partially dependent on laborers for cash income. There is a primitive contractual relationship that laborers pay currency income to companies while those companies provide the status of employee in return.

최소걸침나무 문제의 해법과 확장

김기석 釜山大學校 商科大學 2001 釜山商大論集 Vol.72 No.-

The minimum spanning tree problem arises in a number of applications, both as a stand- alone problem and as a subproblem in a more complex problem setting. We begin this paper by describing several such applications. We next present three algorithms with illustrative examples for the minimum spanning tree problem: Prim's algorithm, Kruskal's algorithm, and Sollin's algorithm. We compare their efficiency by evaluating the computational complexity and practical performance of each algorithm. We also survey applications and algorithms for some extensions of the minimum spanning tree problem. The first type of the extensions is the problem of finding a minimum spanning tree with various constraints: degree-constrained minimum spanning tree(DMST), leaf-constrained minimum spanning tree(LMST), and capacitated minimum spanning tree(CMST). The second type is the problem of finding a minimum spanning tree with nonlinear objective functions: multi-criteria minimum spanning tree(mc-MST). The third type is the problem of finding a minimum spanning tree for a specified subset of the node set: generalized minimum spanning tree(GMST), k-minimum spanning tree(k-MST), and Steiner tree.

카오리나이트의 수열 합성에서 산처리의 효과

고태석,이기완 東新大學校 1998 論文集 Vol.10 No.-

Kaolinite has been hydrothermally synthesized at 220℃ for 15 days with various acidic solution using a mixture of silica monomer and gibbsite or boehmite with a Si/Al ration =1. Acid solution treatment for kaolinite synthesis promotes the dissolution of the starting materials and leads to crystallization in short induction periods. Kaolinite synthesized with gibbsite treated with nitric acid was synthesized in short induction period and 10 ㎛ cubic form crystal, but gave a lower crystallinity due to disordering of unit cell to crystal, whereas Kaolinite synthesized with gibbsite treated with chloric acid gave a higher crystallinity and 0.5 ㎛ hexagonal plate form crystal.

位置從屬 車輛經路問題 解法의 改善

김기석 釜山大學校 商科大學 1999 釜山商大論集 Vol.70 No.-

In the classical vehicle routing problem, a fleet of vehicles deliver goods from a central depot to a set of customers with known demands. The objective of the problem is to form minimum cost routes for the delivery vehicle, while serving all the customer demands. One of the practical variants of the vehicle routing problem is found when there are compatibility problems between some of the customer sites and some of the heterogeneous fleet of vehicles. Only one heuristic algorithm for this vehicle routing with site dependencies is known to this date. This paper presents a mathematical model of the problem of vehicle routing with site dependencies, and analyzes the existing algorithm of the problem. Then this paper considers possible improvements of the existing algorithm in two ways. In the first one, the generalized assignment heuristic (GAH) is adopted to form a more balanced cluster of customers and thus to reduce the total routing cost. In the second one, the tabu search (TS) metaheuristic is utilized to further improve suboptimal solutions obtained by the existing algorithm. Implementations of these improvements remain as a topic of future research on the problem.

Takayasu씨 동맥염의 수술적 치험 : 2례 보고 Report of 2 cases

이석기,임진수 조선대학교 부설 의학연구소 2002 The Medical Journal of Chosun University Vol.27 No.2

We experienced two cases of surgical repair in Takayasu's arteritis. One case was a 37-year-old male patient admitted with the complaints of no pulsation of the radial artery and tingling sensation of left upper extremity. Aortogram and MRA (Magnetic Resorance angiography) revealed nearly complete obstruction of the proximal site of left subclavian artery and luminal narrowing of the left brachial artery on the peripheral angiogram. The other case was a 19-year-old male patient had undergone the none of left ulnar arterial pulsation. Aortogram showed the complete obstruction of the left subclavian artery. In each case, successful surgical treatment was accomplished with a bypass from the ascending aorta to the left subclavian artery using a ring tube graft and with a bypass between the left common carotid artery and left subclavian artery.

분리막 시스템을 이용한 정수공정의 연구

이기완,고태석 동신대학교 환경연구소 1998 환경연구 Vol.3 No.1

황룡강을 수원으로 하는 상수원수와 침전상징수의 정수를 위하여 MF(정밀여과)공정을 적용하였다. 현장에서의 실험결과는 낮은 운전압력일수록 높은 탁도 제거율을 보였으며, 상징수의 탁도는 2~4 NTU로서 MF처리시 1kg/㎠에서는 0.3~0.4 NTU로 2kg/㎠에서는 0.4~0.5 NTU로 감소되었다. 이들 유출탁도는 음용수 기준인 1.1 NTU를 민족 할 정도이었다. 원수는 15~20 NTU의 높은 탁도로서 원수를 직접 MF처리할 경우, 유출수는 1kg/㎠에서 1.9~4.8 NTU로 2kg/㎠ 에서 2.1~4.9 NTU로 나타났다. 이들 탁도는 처리수 기준을 초과하였으므로, 기준을 만족하기 위해서는 다단계의 MF 처리가 권장된다. 막 의 역세척 소요시간은 약 6분이 적합하였다. MF처리공정은 재래식 모래여과기와 비교할 때 작은 소요부지 면적, 막의 내구성과 수명, 약품비등에서 수처리에 효과적임을 보여주었다. MF(Micro Filtration) process was applied to the treatment of raw water and clarified water in water treatment plant sourced from the Hwangryong river. As results of experiments and field study the lower the operating pressure, the higher the turbidity removed. Turbidity of clarified water were reduced from 2~4 to 0.3~0.4 NTU at 1kg/㎠ and 0.4~0.5 NTU at 2kg/㎠ by MF process. These effluent turbidities were acceptable to the drinking water standard of 1.1 NTU. For the raw water of high turbidity with 15~20 NTU the effluents were 1.9~4.8 NTU at 1kg/㎠ and 2.1~4.9 NTU at 2kg/㎠. These turbidities exceeded the standard value of treated water. To meet the standard, multistage operations were executed with the raw water and its turbidity decreased to 0.1 NTU. The proper time for backwashing of the unit was about 6 minutes. Compared with a traditional sand filter, MF process showed the effectiveness of Water treatment due to small area, long life spans and less chericals required.