• 한국병원경영학회지
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• 제19권4호
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• pp.1-8
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• 2014

The purpose of this study is to analyze the performance difference between public and private hospitals. It is believed that private hospitals may have a better performance compared to public hospitals. The study support the hypothesis. By analyzing 425 acute-care hospitals in Korea, this research shows a less performance of public hospitals compared to private hospitals. Higher labor and administrative cost by public hospitals may account for the difference, and it means they are not effective at cost control. Managers in public hospitals, therefore, should pay attention on cost-reducing issues to regain managerial efficiency of organizations.

• 한국유체기계학회 논문집
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• 제7권3호
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• pp.39-47
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• 2004

Micro gas turbines are designed with low turbine inlet temperature and pressure ratio. To overcome the efficiency defect of the simple cycle, adoption of the recuperator is an inevitable choice. In addition to the design performance, we should also pay attention to the off-design performance of gas turbines since they usually operate at part-load conditions lot a considerable amount of their lifetime. This study analyzes off-design performance characteristics of micro gas turbines and addresses the importance of the recuperation process doting the part load operation. Comparative analyses have been performed to evaluate the part load performance differences among various design and operating options : simple vs recuperative cycles, single vs two shaft configurations, various operating strategies for the single shaft configuration, and current vs advanced engines. Major finding is that maintaining high turbine exhaust temperature is crucial for efficient operation of micro gas turbines.

• 유체기계공업학회:학술대회논문집
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• 유체기계공업학회 2003년도 유체기계 연구개발 발표회 논문집
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• pp.80-87
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• 2003

Micro gas turbines are designed with low turbine inlet temperature and pressure ratio. To overcome the efficiency defect of the simple cycle, adoption of the recuperator is an inevitable choice. In addition to the design performance, we should also pay attention to the off-design performance of gas turbines since they usually operate at part-load conditions for a considerable amount of the time. This study aims at analyzing off-design performance characteristics of micro gas turbines and addressing the importance of the recuperator in the part load operation. Comparative analyses have been performed to evaluate the part load performance differences among various design and operating options : simple vs recuperative cycles, single vs two shaft configurations, various operating strategies for the single shaft configuration (fuel only control, variable speed operation, variable inlet guide vane control), and current vs advanced engines. Major finding is that maintaining turbine at high level is crucial in efficient operation of micro gas turbines.

• 인터넷정보학회논문지
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• 제15권3호
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• pp.1-10
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• 2014

클라우드 컴퓨팅은 사용자의 요구에 따라 IT서비스가 생성 및 조정되는 pay-per use 모델을 도입하였다. 그러나 서비스 제공자는 아직도 물리적인 인프라로 인해 발생하는 제약조건들에 대해 관심을 갖고 있다. 필요한 QoS나 SLA를 만족시키기 위해서는 가상화된 자료들이 에너지 소비량을 최소화시키면서 시스템 성능을 최대화시키기 위해 조정되어야 한다. 본 연구는 ANN을 사용하여 클라우드 환경에서 가상화된 자원들을 조정하기 위한 예측적 SLA 어웨어 방안을 제시한다. Qos를 유지하고, 성능과 에너지 효율간의 최적화를 위해서 서버 활용 임계치는 물리적 자원의 소비에 따라 동적으로 적용한다. 또한 많은 자원을 소비하는 VM들은 능력있고 평판이 좋은 호스트에 할당함으로써 부족한 프로비전닝을 방지한다. 제안한 기법의 성능을 평가하기 위해, 이질적인 클라우드 환경에서 최적화되지 않은 전통적인 접근방법 및 기존의 기법들과 비교하였다.

• 한국도로학회논문집
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• 제11권4호
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• pp.95-105
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• 2009

본 연구는 콘크리트 포장의 지불규정 인자 중 콘크리트 휨강도와 표면 평탄성이 콘크리트 포장 공용성에 미치는 영향에 대하여 분석하고, 이러한 인자에 대한 지불규정을 적용할 때 인자의 크기에 따른 적절한 허용범위를 결정하는 근거를 마련하기 위하여 수행되었다. 콘크리트의 휨강도에 대하여 AASHTO, 지수형, 선형 피로파손 공식 등의 공용성 모델을 이용하여 분석을 수행하였으며, 콘크리트 포장의 표면 평탄성에 대해서는 PSI, IRI, PrI 등의 평탄성 지수와 AASHTO 피로파손 공식을 사용하여 분석을 수행하였다. 연구결과, 휨강도의 허용 기준은 휨강도 손실률(손실량/휨강도)을 기준으로 하여야 하며, 휨강도 손실률이 증가할수록 설계수명이 선형으로 감소하기 때문에 이에 적절하게 공사비를 차감 지급해야 하는 것을 알 수 있었다. 표면 평탄성은 초기 평탄성이 우수할수록 평탄성지수의 손실률을 크게 허용해야 하며, 휨강도와 같이 평탄성 지수 손실률과 포장 수명 감소가 선형으로 비례하므로 공사비 차등 적용도 이에 적절하게 하여야 한다는 것을 알 수 있었다.

• 보건행정학회지
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• 제23권1호
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• pp.3-18
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• 2013

This paper investigates the possibility of expanding pay-for-performance (P4P) program as a provider payment system, in terms of financial, economical, and political sustainability. In order to expand the sustainable P4P, P4P should have usefulness in terms of economic value as well as efficiency in the financial aspects of health care. More importantly, the P4P would be politically sustainable only when both providers and consumers can accept. Korea's healthcare system seems to have logical ground for the P4P program financially and economically. However, how well the P4P can work remains to be proven in its implementation. After 43 tertiary hospitals applied the P4P program for acute myocardial infarction (AMI) and C-section in 2007, the number of hospitals adopting the P4P program for AMI and C-section has increased to 316 in 2011, and an incentive for hospitals applying the P4P has risen to 2% from 1% of health insurance benefits. This shows that the P4P program introduced by Health Insurance Review and Assessment Service is quite successful. In addition, people are aware of the need for improved P4P program and policy alternatives have been already made. Therefore, it is very important to come up with politically supportable strategies that can make providers and consumers accept the P4P program while maintaining the governance of the existing health insurance policy. To this end, there are some tasks to be considered. First, the expansion of the P4P program should be placed on the agenda of the Health Insurance Policy Review Committee, the highest decision-making body, and a separate agency for P4P planning should be established. Second, for more efficient P4P program, the processes of review and assessment, currently carried out separately, should be integrated into a single process. Third, infrastructure to measure the quality of medical services should be sharply expanded. Fourth, the current paradigm for the assessment should be changed. Lastly, a P4P program for consumers should be considered. Given that the consumers in Korea can use medical services freely, the National Health Insurance Corporation could initiate the P4P program for consumers as a means of controlling excessive use of medical services and adjusting consumer's moral hazard.

• International Journal of Quality Innovation
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• 제10권1호
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• pp.89-105
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• 2009

This study aims to probe into the influence of new product design and new product development process management on development performance. The research finding demonstrates that product design reveals positive and significant influence on new product development performance. Through statistical analysis, this study finds that companies in Taiwan value new product design. When companies value it more, they tend to have better new product development performance. With regard to the relation between new product development process management and new product development performance, the empirical results demonstrate that companies would pay more attention on new product development process management. With regard to new product idea and assessment, concept design and development, product function test and mass production in the market, through statistical analysis, this study finds that companies that value process management of new product development tend to have better new product development performance. As to the influence of new product design and new product process management on new product development performance, statistical analysis result demonstrates that the integration between new product design valued by companies in Taiwan and development process management would lead to significantly positive influence on new product development performance of the companies.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.596-601
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• 2013

In the current pavement construction practice, the state agencies traditionally determine the quality of the as-constructed pavement mix based on individual mixture material parameters (e.g., air voids, cement or asphalt content, aggregate gradation, etc.) and consider these parameters as key variables to influence payment schedule to the contractors and the present and future quality of the as-constructed mixture. A set of empirically pre-determined pay adjustment schedule for each parameter that was differently developed and being used by the individual agencies is then applied to a given project, in order to judge whether each parameter conforms to the designated specifications and consequently the contractor may either be rewarded or penalized in accordance with the payment schedule. With an improved quality assurance system, the Performance Related Specification, the individual parameters are not utilized as a direct judgment factor; rather, they become independent variables within a performance prediction function which is directly used to predict the performance. The quantified performance based on the prediction model is then applied to evaluate the pavement quality. This paper presents the brief history of the quality assurance in asphalt pavement construction including the Performance Related Specifications, statistical performance models in terms of fatigue and rutting distresses, as an example of the performance prediction models, and envisions the possibilities as to how this Performance Related Specification could be utilized in other infrastructures construction quality assurance.

• 한국병원경영학회지
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• 제10권4호
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• pp.1-22
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• 2005

Quality of care and patient safety have become today's agenda for healthcare industry in worldwide. This paper describes experiences to improve quality of care and patient safety in USA and identifies some future tasks for better implementation of quality improvement efforts. The paper concludes with a discussion of the implications for Korean healthcare system.

• 제어로봇시스템학회논문지
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• 제7권6호
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• pp.502-508
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• 2001

In this paper, slack is computed from a comparison of the cable pay out rate and the ship ground speed in accordance with laying conditions, and the speed controller of the cable engine based on an H(sub)$\infty$ servo control id designed for adjusting the cable engine in order to lay a desired amount of slack. The controller is designed for robust tracking of the cable engine under disturbances. The performance of the designed controller is evaluated by computer simulation, and, consequently, a feasibility study for laying the submarine cable stably is done through analyzing simulation results.