• 국제학술발표논문집
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• The 8th International Conference on Construction Engineering and Project Management
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• pp.23-29
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• 2020

Multilayer sub-contracting is a significant practice among the world, including Hong Kong. When a principal contractor secured a project from a developer, the specific jobs will usually be breaking down and sub-contractors with the lowest bid [1]. The adoption of multilayer sub-contracting has been a controversy issue which is considered as a two-side blade. While certain studies have been carried out to examine both the contributions, damages and improvements for multi-layer subcontracting, the construction industry and researchers are still waiting for a solid measure to enhance the system. Hence, this research attempts to study the advantages, disadvantages, conducts a comparison between single and multilayer sub-contracting and measures of current Hong Kong construction industry based on literature review, questionnaire and in-depth interviews. To achieve the objectives, Analytic Hierarchy Process (AHP) and total weighted score methods are adopted to examine and rank the criterion. The findings of this study provide a good basis for understanding the major reasons and problems caused by the adoption of multilayer sub-contracting. Besides, the identified safety perspective explores a new perspective regarding to issues of multi-layer subcontracting, which will serve as a solid foundation for further research to enhance safety performance. Finally, the findings of measurements towards improvement of multilayer sub-contracting will also provide a solidsolution for construction industry.

• 해양환경안전학회지
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• 제15권3호
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• pp.229-236
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• 2009

본 연구는 현재 통폐합 위기에 처한 부산항부두관리공사의 답당 업무인 국제여객터미널, 크루즈터미널, 연안여객터미널 등 항만시설 관리업무의 합리적 민간위탁 방안을 모색하고자 하였다. 이러한 연구목적을 달성하기 위하여 이들 항만시설 관리의 위탁기간, 위탁의 당위성(장점), 위탁범위와 위탁비용 등을 탐색하였다. 연구의 결과, 부산항부두관리공사 자체를 주식회사 형태로 민간화하고, 항만시설 관리업무를 동 법인에 위탁시키는 방안이 최선의 대안으로 도출되었다.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2009년도 춘계학술발표회
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• pp.95-103
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• 2009

본 연구는 현재 통폐합 위기에 처한 부산항부두관리공시(이하 부공이라 함)의 담당업무인 축제여객터미널, 크루즈터미널, 연안여객터미널 등 항만시설 관리기능의 합리적 민간위탁 방안을 모색하고자 하였다. 이러한 연구목적을 달성하기 위하여 이들 항만시설물의 위탁기간, 위탁의 당위성(장점), 위탁범위와 위탁비용 등을 탐색하였다. 연구의 결과, 부공 자체를 주식회사화 하여 민간화시키는 방안이 최선의 대안으로 도출되었다.

• 한국습지학회지
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• 제19권2호
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• pp.211-215
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• 2017

하수처리장 운영 시장 규모는 전세계적으로 증가하고 있는 추세이다. 이에 하수처리장 관리 대행 제도는 국내 하수처리장의 효율적인 운영을 위해 도입되었지만 지속적으로 개선의 필요성이 제기되고 있다. 본 연구에서는 하수처리장 관리 제도의 활성화를 위해 현행 하수처리장 운영비용 현황 조사 및 개선 방안을 연구하였다. 하수처리장 용량이 클수록 하수처리단가가 감소하는 하는 경향을 보였다. 전체 하수처리장 운영 단가는 공기업이 가장 저렴하였지만, 유사 하수 처리장(유사 용량, 유사 공법, 유사 운영 기간)의 운영비용을 비교하였을 경우 민간 기업이 가장 저렴한 것으로 나타났다. 하수처리장 관리 및 운영 관계자들과의 면담 조사 결과 관리대행업자 선정 및 운영 비용 산정 방법 개선이 필요하다는 의견이 제시되었다. 본 연구는 하수처리장 관리 대행 활성화를 위한 방안 제시를 위한 기초 자료로 활용 될 수 있을 것으로 판단한다.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.638-642
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• 2005

This paper presents incentive application strategies and delay prevention strategies as schematic approaches to improve time performance of highway construction contracts. This research recognizes the importance of improving time performance during highway construction. Strategic solutions of the most core issues on time performance incentive contracting are identified. The suggested incentive application strategies develop criteria for applying time classification to projects, for assigning project time classifications to contractors and designers, and for determining appropriate incentive values in A (cost) + B (time cost) and other performance incentive contracts. The suggested delay prevention strategies develop criteria for determining the appropriate subsurface utility engineering (SUE) level and to develop best practices for avoiding utility relocation delays. A schematic approach for each strategy is developed. This paper also introduces current incentive contracting practices in Florida. The researchers obtained the information from experienced persons in the highway construction industry, including key highway contractors, designers, and Department of Transportation (DOT) and Federal Highway Administration (FHWA) personnel. The major focus of this research is to develop strategies and suggest approaches to improve time performance of highway construction contracts. For future study, practical tools to facilitate implementation of the suggested strategies should be developed, so that the criteria, implementation processes, and best practices developed may contribute to the current industry-wide effort to improve time performance.

• Pediatric Infection and Vaccine
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• 제8권2호
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• pp.229-233
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• 2001

저자들은 지속적인 고열과 심한 기침 및 가래, 호흡곤란을 주소로 내원한 15세 남아에서 결핵 치료를 받고 있던 중 홍역에 이환 되어 악화되었고, 투약 중이던 모든 약제에 내성이 나타난 폐결핵을 문헌 고찰과 아울러 보고한다.

• 국제학술발표논문집
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• The 1th International Conference on Construction Engineering and Project Management
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• pp.986-991
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• 2005

Intense competition existing in construction market creates an industry that is dominated by the client groups. Numerous studies dealing with private clients' needs and expectations from contractor firms exist in the literature. However in the unique construction industry, in addition to clients, consultants as representatives of clients will almost always have very important roles to play as well. By presenting survey findings of 50 consultant firms, this study provides insights into consultants' general needs and expectations from contracting organizations on behalf of their clients by using the data from Northern Cyprus private building construction market.

• 대한수학회지
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• 제51권4호
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• pp.703-719
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• 2014

This paper is concerned with the traveling wave solutions of nonlocal dispersal models with nonlocal delays. The existence of traveling wave solutions is investigated by the upper and lower solutions, and the asymptotic behavior of traveling wave solutions is studied by the idea of contracting rectangles. To illustrate these results, a delayed competition model is considered by presenting the existence and nonexistence of traveling wave solutions, which completes and improves some known results. In particular, our conclusions can deal with the traveling wave solutions of evolutionary systems which admit large time delays reflecting intraspecific competition in population dynamics and leading to the failure of comparison principle in literature.

• 동의생리병리학회지
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• 제19권4호
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• pp.835-839
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• 2005

I studied on the correlativity with an individual constitution and etiological factor, the results are as follows. As the external wickedness invade into human body, the condition of an individual constitution determine whether being attacked with a disease or not. Moreover the contracting and the tendency of a disease are determined from the peculiarity of an individual constitution. And whether being attacked with a disease or not, the contracting and the tendency are possible explained of DONG-GI-SANG-GU(the indentical vigour looking for mutually). The division on the malice for cause of a disease and the symptom of a disease are more and more necessary.

• 대한수학회보
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• 제59권2호
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• pp.481-506
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• 2022

This paper is concerned with the study of various notions of shadowing of dynamical systems induced by a sequence of maps, so-called time varying maps, on a metric space. We define and study the shadowing, h-shadowing, limit shadowing, s-limit shadowing and exponential limit shadowing properties of these dynamical systems. We show that h-shadowing, limit shadowing and s-limit shadowing properties are conjugacy invariant. Also, we investigate the relationships between these notions of shadowing for time varying maps and examine the role that expansivity plays in shadowing properties of such dynamical systems. Specially, we prove some results linking s-limit shadowing property to limit shadowing property, and h-shadowing property to s-limit shadowing and limit shadowing properties. Moreover, under the assumption of expansivity, we show that the shadowing property implies the h-shadowing, s-limit shadowing and limit shadowing properties. Finally, it is proved that the uniformly contracting and uniformly expanding time varying maps exhibit the shadowing, limit shadowing, s-limit shadowing and exponential limit shadowing properties.