• 대한관절경학회지
• /
• 제2권2호
• /
• pp.147-150
• /
• 1998

We reviewed the charts and photos taken during arthroscpy of 218 knees of 214 patients(240 menisci) retrospectively. The male was 156 cases(73%) and the female 58 cases(27%). The mean age of the patients was 35 years(range, 7-68). The patients who had definite trauma history were classified as trauma group(Group 1), and the patients who had no or could not recall trauma history were as atrauma group(Group 2). The trauma group was subclassified into the the patients with sports injury, traffic accident, fall down, slip down, direct injury, and miscellaneous according to the causes of the trauma. The patterns of meniscal tear were classified into longitudinal, bucket-handle, horizontal, transverse, flap, complex, and degenerative tear on the basis of O'Connor's classification. The aim of this study was to compare the meniscal tear patterns between trauma group(Group 1) and atrauma group(Group 2) and between the patients before and after the age of 40. The results were as follows ; 1) The difference in the incidence of tear between medial and lateral meniscus was not significant statistically. 2) In Group 1, 60% of the cases showed the longitudinal and bucket-handle tear and 52% of the cases of Group 2 were horizontal tear. 3) In the patients before the age of 40, the longitudinal and bucket-handle tear were 52% of the cases and in the patients over 40, tear patterns which were thought to be related to degenerative change, horizontal and degenerative tear were more than half of the cases (51%).

• 한국정보시스템학회지:정보시스템연구
• /
• 제10권1호
• /
• pp.51-72
• /
• 2001

E-commerce has not only brought about a great change in the way we exchange goods and services but also revolutionized the way we handle business transactions. In addition, it has a significant influence upon the present business structure, and most of firms in service industry as well as manufacturing are considering adopting E-commerce in a serious manner. Most vessels purchase merchandises through a number of shipping agents. As the amount of harbor materials increase, the number of vessels and their navigation frequency also increase. As a result, the amount of procurement for ships has increased. Traditional means such as telephone and fax to handle ever-increasing harbor transaction, however, has proved to be very time-consuming and cost ineffective. Therefore, people are starting to look for more effective ways. In this paper, an internet-based scheme of B2B transaction is proposed to handle procurement problem between shipping agency and shipping company, and between vessel and suppliers as a more effective approach to streamline such problems. We extract problems of shipping agency through task-analysis and present a scheme that performs decision making and procurement as a system agent with brokering structure. Purchaser and supplier are offered material information rapidly and task loads are minimized by the scheme. Also, the system can support decision making of purchasing goods, and information is shared among purchaser, supplier and system through the system interface.

• 한국CDE학회논문집
• /
• 제6권2호
• /
• pp.78-88
• /
• 2001

In order to adopt feature-based parametric modeling, CAD/CAM applications must have a geometric constraint solver that can handle a large set of geometric configurations efficiently and robustly. In this paper, we describe a graph constructive approach to solving geometric constraint problems. Usually, a graph constructive approach is efficient, however it has its limitation in scope; it cannot handle ruler-and-compass non-constructible configurations and under-constrained problems. To overcome these limitations. we propose an algorithm that isolates ruler-and-compass non-constructible configurations from ruler-and-compass constructible configurations and applies numerical calculation methods to solve them separately. This separation can maximize the efficiency and robustness of a geometric constraint solver. Moreover, the solver can handle under-constrained problems by classifying under-constrained subgraphs to simplified cases by applying classification rules. Then, it decides the calculating sequence of geometric entities in each classified case and calculates geometric entities by adding appropriate assumptions or constraints. By extending the clustering types and defining several rules, the proposed approach can overcome limitations of previous graph constructive approaches which makes it possible to develop an efficient and robust geometric constraint solver.

• 한국경영과학회지
• /
• 제20권2호
• /
• pp.39-60
• /
• 1995

In this paper, an integration of stochastic dynamic programming (SDP), integer goal programming (IGP) and analytic hierarchy process (AHP) is proposed to handle multiobjective-multicriteria sequential decision making problems under uncertainty inherent in R & D investment planning. SDP has its capability to handle problems which are sequential and stochastic. In the SDP model, the probabilities of the funding levels in any time period are generated using a subjective model which employs functional relationships among interrelated parameters, scenarios of future budget availability and subjective inputs elicited from a group of decision makers. The SDP model primarily yields an optimal investment planning policy considering the possibility that actual funding received may be less than anticipated one and thus the projects being selected under the anticipated budget would be interrupted. IGP is used to handle the multiobjective issues such as tradoff between economic benefit and technology accumulation level. Other managerial concerns related to the determination of the optimal project portifolio within each stage of the SDP model. including project selection, project scheduling and annual budget allocation are also determined by the IGP. AHP is proposed for generating scenario-based transformation probabilities under budgetary uncertainty and for quantifying the environmental risk to be considered.

• 한국항만학회지
• /
• 제10권1호
• /
• pp.1-14
• /
• 1996

Rapid change in the technological environment of marine transportation and the development of the ocean shipping industry have fostered a revolution in the port system. This in turn has caused major changes in the function and use of port in Korea. Aside from this, Mokpo Port, however continues to decline, because the existing port facilities and related subsystem are already obsolete with no chance of regaining operational effectiveness and treatment for proper implementation. Although a few studies have been done on the Mokpo Port, has not been found, any reseach for the analytical approach to the transportation system of it. This paper aims to make an extensive analysis of the physical distribution system in Mokpo Port focusing on the coordination of subsystems such as navigational aids system. The base of introduced simulation tool here is the queueing theory. The overall findings are as follows: 1. Among those vessels called at Mokpo Port in 1994, 556 ships(2,736,669 G/T) are oceangoing while 8155 ships(2,587,217 G/T) are domestic. The average size of oceangoing vessels is 4,922,1 G/T, and the domestic is 317,8 G/T. The average arrival interval and service time of the domestic vessels are 6.0 hours and 24.1 hours respectively marking the berth occupation rate over 100%. Those for oceangoing vessels are 34.5 hours, 120.0 hours and 37.2%. In order to maintainin the berth occupation rate to 70% the capacity considering the 1994 of domestic piers must be extended to 145% and oceangoing vessels must be increased to 165%. 2. The capacity of approaching channel is enough to handle the total traffic volume of 3. Tugs are sufficiently being provided to handle all ships requiring their services 4. The capacity of storage and inland transportation systems are sufficient to handle the throughput and the yard stroage utilization rate of No.1 - No.5 is 4.5% and No.6 is 30% of 1993's. 5. The utilization rate of LLC(Level Looping Crane) and PNT(PNeumaTic) are 2.7% and 18.8%, respectively.

• 대한지역사회작업치료학회지
• /
• 제4권2호
• /
• pp.31-40
• /
• 2014

목적 : 뇌졸중 환자가 요구하는 주거공간의 욕실 환경 특성을 알아보고 욕실 환경을 개선할 때 필요한 욕실 디자인 특성 선호도를 알아보았다. 연구방법 : 본 연구는 2014년 2월 24일부터 3월 13일까지 부산지역의 병원에서 재활치료를 받고 있는 뇌졸중 환자를 대상으로 설문조사를 실시하였으며 총 97부를 분석하였다. 결과 : 욕실 환경에 대한 개선 요구 조사 결과 미끄러움 방지 타일 설치($3.63{\pm}1.29$)와 욕조의 안전바 설치($3.46{\pm}1.39$)가 높게 나타났고 남자에 비해 여자의 요구도가 전반적으로 높았다. 욕실디자인 특성 선호도 조사에서 뇌졸중 환자들은 미닫이문, 미닫이형 손잡이, 편의시설형 샤워부스, 미끄러움 방지 타일, 붙박이 수납장, L자형 안전바, 자연환기(창문), 바닥 난방, 들어가기 쉬운 욕조, 안전바가 설치된 욕조, 기울어지거나 물 온도가 표시되는 세면대, 안전바형 변기, 목욕 의자를 가장 선호하는 것으로 나타났다. 결론 : 뇌졸중 환자의 욕실 환경에 대한 개선요구와 욕실디자인 특성선호도를 확인할 수 있었다. 이는 향후 뇌졸중 환자들이 요구하는 욕실디자인을 제안하는데 기초자료를 제공할 것으로 기대된다.

• International Journal of Fuzzy Logic and Intelligent Systems
• /
• 제5권2호
• /
• pp.124-130
• /
• 2005

Obstacle avoidance of underwater robots based on a modified virtual force field algorithm is proposed in this paper. The VFF(Virtual Force Field) algorithm, which is widely used in the field of mobile robots, is modified for application to the obstacle avoidance of underwater robots. This Modified Virtual Force Field(MVFF) algorithm using the fuzzy lgoc can be used in moving obstacles avoidance. A fuzzy algorithm is devised to handle various situations which can be faced during autonomous navigation of underwater robots. The proposed obstacle avoidance algorithm has ability to handle multiple moving obstacles. Results of simulation show that the proposed algorithm can be efficiently applied to obstacle avoidance of the underwater robots.

• 한국염색가공학회지
• /
• 제8권3호
• /
• pp.52-58
• /
• 1996

In order to study an applicable level for the graft finish of silk filaments and the characteristics of silk fabric, some sample fabrics were woven with grafted weft and the characteristics of sample fabrics were analyzed to evaluate the mechanical properites and the handle values according to the graft yield(%) of MMA and HEMA monomers on silk filaments. 1. The tensile properties were detected in the increase of linearity(LT) and the recovery in time of the increasing resilience(RT). 2. The bending properties were detected to have a lot of effect on the balance of bending rigidity(B) to hysteresis(2HB) according to the elastic relaxation of warp tension and the interlacing stress. 3. The shearing properities were detected to show the softness and the elastics in a case of the decrease in shearing rigidity(G) and hysteresis(2HG, 2HG5) according to the graft yields. 4. The compression properties were detected in the decrease of linearity(LC) and the uniformity of resilience(RC). It explains that the tendancies of compressible variation is not accepted. 5. The surface properities were detected to be affected by the surface forms of grafted silk filaments and the variation in the morphologies of interlacing sections. Considering the interlacing eveness, MMA grafted fabrics were accepted within the level of WOMEN'S THIN DRESS(KN-201-LDY) but HEMA grafted fabrics were not accepted. 6. The variation of handles were detected in the increase of total hand(TAV) within the levels of 65% of KOSHI and 82% of HARI on the average. 7. The handle fashions were detected in the nature of Habuta and Dechine from MAA graft but the nature of Fugi were shaped from HEMA graft in proportion to the graft yields.

• 정보보호학회논문지
• /
• 제15권2호
• /
• pp.105-111
• /
• 2005

GF(2) 셀룰라 오토마타가 비트단위로 데이터가 처리되는데 비하여 GF(2P) 셀룰라 오토마타는 비트단위 이상의 단위로 데이터론 처리할 수 있다. 본 논문에서는 GF(2p) 위에서의 유한체 성질을 이용하여 한 개의 트리로 구성되는 GF(2P)위에서의 nongroup 셀룰라 오토마타의 상태들의 움직임을 분석한다. 또한 기력경로를 이용하여 GF(2P)위에서 선형 SACA의 상태전이 그래프를 구성하는 방법과 선형 SACA의 상태전이 그래프를 이용하여 비선형인 여원 SACA의 상태전이 그래프를 구성하는 방법을 제시한다.

• 한국원자력학회:학술대회논문집
• /
• 한국원자력학회 2002년도 추계학술발표회요약집
• /
• pp.49.2-49
• /
• 2002