A Study on the Performance Effect of Process Management in Korean Tramp Market

This research aims to understand the problems of the Korean tramp ships amidst global competition, and to find their advantages in order to propose policies that may effectively improve their management performancethe causal relationship between the liners core process and performance has been analyses and the results are as follows: First, out of four types of tramp, vessel management and operation management were recognized as the most important core process factors,followed by management system, crew management and vessel acquisition. Second, comparing the importance of variables in factors, decision making support system was recognized as most important in management system factor, financial capacity in vessel acquisition in vessel acquisition factor,vessel safety and sustained environmental education in crew management factor, the clarity of the captain’s authority in vessel safety and environmental protection in vessel management and operation management. In performance variable, the accident rate took the highest priority. Third, in terms of causal relationship between processes, management system factor had the biggest effect on vessel management and operationmanagement factors. This was followed by the effect of crew management on vessel management and operation management, and then that of management system factor on vessel acquisition and crew management factors. The effect of vessel management and operation management on performance was strong in terms of profit effect, but was rather low in cost effect. Fourth, according to the results of hypothesis verification according to the route analysis between factors, the effect of vessel acquisition factor on vessel management and operation management had no significant relevance. The influence of vessel management and operation management on cost effect (Hypothesis VI-1) showed a significance possibility of below 0.05 and a significant definition relationship. Other hypothesis all showed strongly significant positive relationships. According to the results of this research, vessel management and operation management process are all core processes that contribute to the cost reduction and profit maximization of tramp company. Hence, the operation of appropriate preventive maintenance system, appropriate causal analysis of vessel damage, response and regular thorough vessel maintenance are necessary. Also, appropriate analysis of operation record,establishment of operation plan, and the establishment of appropriate response system for safe operation, cargo management and pollution prevention are necessary to build competitive strength. Five types of core process influence in order and eventually have positive influence on the performance of tramp company. The research shows that the management of tramp companies must consider such influential relationships in their systematic management of process in order to cut cost and maximize profit.제1장 서론 = 1 제1절 연구의 배경과 목적 = 1 제2절 연구의 목적 = 3 제3절 연구의 방법 및 구성 = 3 제2장 해운시장의 환경변화 = 5 제1절 세계해운환경 = 5 제2절 국내해운환경 = 9 제3절 우리나라 외항선 현황 = 11 1. 국적외항선대 선종별 현황 = 11 2. 국적외항선사의 선박확보추이 = 13 제4절 부정기선 해운시장의 일반적인 사항 = 18 1. 부정기선 해운시장의 의의 = 18 2. 해운산업과 부정기 해운시장의 특징 = 21 3. 부정기 해운시장의 운임과 위험요인 = 22 4. 부정기선 용선자의 해운서비스 구매과정 = 24 5. 부정기선의 운항업무 = 30 6. 부정기선의 ISM Code = 32 제5절 부정기선 시황의 특징과 운임 = 34 1. 우리나라 건화물선의 화물수송실적 = 34 2. 건화물선 시황변화의 특징과 운임전망 = 37 3. 유조선 시장의 시황변화 = 42 4. 부정기선 시황변화의 특징과 운임전망에 대한 시사점 = 44 5. 부정기선의 선박 시장 = 46 제3장 이론적 배경과 선행연구 고찰 = 49 제1절 프로세스의 개념 및 개요 = 49 1. 프로세스의 정의 = 49 2. 프로세스의 형태 = 51 3. 프로세스 접근방법 = 52 4. 프로세스 접근방법의 실행 = 53 5. 프로세스관리의 중요성 = 55 제2절 이론적 배경 및 선행연구 고찰 = 57 1. 프로세스 조직의 도입 배경 = 57 2. BPR 기법 = 58 3. ERP 기법 = 60 4. 품질경영시스템(ISO 9001) = 62 5. TQM 기법 = 68 6. 식스시그마 기법 = 71 7. SCM 기법 = 72 8. ISM CODE = 78 제3절 부정기선사의 프로세스 관리 = 80 1. 경영관리시스템 = 80 2. 선박확보 = 80 3. 선원관리 = 81 4. 선박관리 = 81 5. 운항관리 = 83 제4장 실증분석 = 86 제1절 연구모형 설정과 변수측정 = 86 1. 연구모형과 연구가설 설정 = 86 2. 변수의 조작적 정의와 측정 = 88 제2절 자료수집과 분석방법 = 91 1. 자료수집과 분석방법 = 91 2. 설문문항의 구성 = 92 3. 응답자 일반사항 = 94 제3절 분석결과와 해석 = 99 1. 프로세스요인들의 신뢰성과 타당성검정 = 99 2. 성과변수의 신뢰성과 타당성검정 = 104 3. 구조방정식에 의한 경로분석 결과 = 105 4. 가설검정결과의 요약 = 114 제5장 결론 = 116 제1절 연구결과의 요약 = 116 제2절 연구결과의 시사점 = 118 제3절 연구의 한계점과 향후 연구과제 = 118 참고 문헌 = 120 1.국내문헌 = 120 2.국외문헌 = 12

B형 간염핵심항원 항체 양성인 간 이식편 내 B형 간염 바이러스 DNA 발현의 변화

Thesis(master`s)--서울대학교 대학원 :의학과 외과학전공,2005.Maste

A Neural Network Algorithm for Adaptively Assigning Channels in Mobile Cellular Systems

특정 셀의 트래틱 증가와 같은 환경변화 요인으로 인해 셀이 신설되거나 기존 셀에서 추가로 채널을 필요로 할 경우, 새로이 채널을 할당해야 한다. 이때 기존에 할당된 채널들은 변경하지 않는 범위에서 추가로 채널을 할당하는 문제를 적응적인 채널할당문제라 정의한다. 본 논문에서는 흡필드 신경회로망을 적응적인 채널할당문제에 적용한다. 특히 기존 할당상황에 대한 정보를 이용하여 신경회로망에서 뉴런초기값을 결정하였다. 위의 모델을 예제에 적용시켜 본 결과 제약조건을 만족하는 채널할당을 찾을 수 있었다

Neural network approach for the additional channel assignment problem

학위논문(석사) - 한국과학기술원 : 경영과학과, 1993.2, [ ii, 47 p. ]한국과학기술원 : 경영과학과

Radio Network Design in an Urban Micro-Cellular CDMA system

This paper addresses a radio network design problem in an urban micro-cellular CDMA system. Given the data of potential sites of base stations and path loss value between the base station and mobile stations, the objective of this problem is to locate base stations so as to minimize the siting cost while keeping the acceptable path loss value on the service area. We develop an efficient algorithm for solving the problem, and computational experiments are conducted to show the practicality of the proposed design method

셀룰러 이동통신 시스템에서의 무선망 계획에 관한 연구

학위논문(박사) - 한국과학기술원 : 테크노경영대학원, 1998.8, [ vii, 87 p. ]The successful deployment of a cellular system depends greatly upon the cellular network planning process which includes such operations as transmission and radio propagation predictions, geographical and traffic parameters evaluation, optimal radio network design, and network resource allocation. Among them, the importance of optimal radio network design and network resource allocation is ever-increasing now. This thesis has dealt with some optimization models for radio network planning, especially related to radio network design and network resource allocation, in mobile cellular communication systems. First, a radio network design problem is considered in a cellular CDMA system, in which blocking is enforced when the relative interference exceeds a certain threshold level. Given the data of call-traffic distributed over the service area and potential sites of base stations, the objective of the problem is to locate base stations so as to minimize the associated cost for establishing base stations while keeping the probability of blocking under control. An efficient algorithm for solving the design problem is developed. Computational experiments with real-world data are conducted to show both the efficiency and the practicality of the proposed design method. Computational results showed that the proposed algorithm consistently performed well both in solution quality and in speed as to be practicable. The rapid growth of users and rising subscriber expectations have led cellular network operators to deploy microcells in the urban areas, especially in hot spots. Our second model deals with the so-called micro Base Station Location Problem (mBSLP) for the urban cellular environment, the objective of which to locate mBSs with minimum cost over a specified coverage region so that the signal at various mobile station locations is of sufficient intensity, while the overlapped areas are minimized. For the mBSLP, a heuristic algorithm was developed, and computer sim...한국과학기술원 : 테크노경영대학원

Pure Laparoscopic Donor Hepatectomy: A Multicenter Experience

According to recent international consensus conferences, pure laparoscopic donor hepatectomy (PLDH), particularly right and left hepatectomies, is not yet considered a standard practice because studies remain limited. Thus, we present the outcomes of more than 500 PLDH patients, mostly receiving a right hepatectomy. To our knowledge, this is the largest study to date on PLDH. Data from all living liver donors who underwent PLDH at 5 centers in Korea until June 2018 were retrospectively analyzed. The outcomes of both donors and recipients were included. Pearson correlation analysis was used to explore the relationship between the duration of surgery and cumulative experience at each center, which reflects the learning curve. Overall, 545 PLDH cases were analyzed, including 481 right hepatectomies, 25 left hepatectomies, and 39 left lateral sectionectomies (LLS). The open conversion was necessary for 10 (1.8%) donors, and none of the donors died or experienced irreversible disability. Notably, there were 25 (4.6%) patients with major complications (higher than Clavien-Dindo grade 3). All centers except one showed a significant decrease in surgery duration as the number of cases accumulated. Regarding recipient outcomes, there were 110 cases (20.2%) of early major complications and 177 cases (32.5%) of late major complications. This study shows the early and late postoperative outcomes of 545 donors and corresponding recipients, including 481 right hepatectomies and 25 left hepatectomies, from 5 experienced centers. Although the results are comparable to those of previously reported open donor hepatectomy series, further studies are needed to consider PLDH a new standard practice