http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
엄흥섭 한국기업경영학회 2000 기업경영연구 Vol.7 No.1
In these days, the role of information system has been changed from just a supplier of hardware or software to that of comprehensive information systems service. In this issue, it is essential for it to have the service quality in information systems. But until now, many studies on service quality in information systems using only one measurement, SERVQUAL, has carried regardless of their types of speciality of industries. so it is natural that we have a lot of problems on measuring the service quality in information systems. In this study I used a new evaluation viewpoints to measure the service quality in information systems and they are the bases at this study. by using them I could get the 6 dimensions of making service in information systems. The results are followed as; First, the result of analysing dimensions of service quality in information systems was divided into 6 quality dimensions such as information of output, assistance, attitude of service supplier, supplied equipment and facility, the operation of equipment and facility, the use of information. this measurement give several different service quality dimensions and indexes than those of present SERVQUAL method, and gave an example of the necessity of making a new appropiate method on measuring service quality. Second, the extracted dimension of service quality in information system influences on user`s satisfaction was all of the 6 dimensions were statistically significant effected-variables. These dimensions of service quality in information system should be significantly considered in making strategy. Third, there has been a lot of argument among scholars how to measure service quality. The consequence of effectiveness test in information system shows that perception score, the measured only by performance could explain the user`s satisfaction much better than the model which is carried on [expectation - perception]. It seems that next studies had better consider the differences in user`s expectation degree consisting dimensions of structured quality to make and establish a new service quality management strategy in information systems.
원전 기기 건전성의 온라인 검사를 위한 유도 초음파의 실험적 연구
엄흥섭,김재희,송성진,김영환 한국비파괴검사학회 2004 한국비파괴검사학회지 Vol.24 No.4
기기 건전성의 온라인 검사 및 감시 기술은 기존의 원전의 가동 중 검사의 효율적 수행에 필요한 정보를 제공한다. 유도 초음파는 온라인 검사와 감시에 활용 가능성이 있는 기술 중의 하나로 알려져 있다. 본 연구에서는 온라인 검사 및 감시 기술 개발의 일환으로 유도초음파를 이용하여 파이프의 건전성을 검사/감시하는 기술을 개발하고자 한다. 이를 위해 증기 발생기 세관을 실험 대상으로 하여 분산 선도 및 특정 모드에 대응하는 초음파 입사각을 계산하였다. Short time Fourier transform을 이용한 시간-주파수 분석을 통하여 유도초음파 모드를 확인하였으며, 유도 초음파가 증기발생기 세관의 곡관 부분을 통과할 때 모드 변환이 발생하지 않는 것을 실험적으로 확인하였다. 유도 초음파를 이용한 증기발생기 세관의 최적 검사 모드를 제안하고 실험에 의하여 이를 확인하였다. Deployment of an advanced on-line monitoring of the component integrity offers a prospect of improved performance, enhanced safety, and reduced overall cost for nuclear power plants. Ultrasonic guided waves have been known as one of the promising techniques that could be utilized for on-line monitoring. The present work is aimed at developing a new method for on-line monitoring of the pipes during the operation period of nuclear power plants. For this purpose, the steam generator (S/G) tube was selected as an object of the experiment. Dispersion curves and the incident angles corresponding to the specific modes were calculated for the S/G tube. The modes of guided waves were identified by the time-frequency diagrams obtained by the short time Fourier transform. It was experimentally confirmed that there was no mode conversion when the ultrasonic guided waves passed over the curved region of the S/G tube. An optimum mode of guided wave for the S/G tube was suggested and verified by the experiment.