• The Bulletin of The Korean Astronomical Society
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• v.14
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• pp.7.2-7.2
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• 1989

• Proceedings of the Korea Water Resources Association Conference
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• 1998.05a
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• pp.333-338
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• 1998

• Bulletin of the Society of Naval Architects of Korea
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• v.51 no.3
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• pp.19-26
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• 2014

• Journal of the Korean Geotechnical Society
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• v.37 no.10
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• pp.65-76
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• 2021

There is a possibility of cavities occurring inside and behind the lining of an aged tunnel structure. In most cases, it is not easy to check the cavity because it exists in a place where visual inspection is impossible. Recently, attempts have been made to evaluate the condition of the tunnel lining and the backfill materials using non-destructive tests such as Ground Penetrating Radar, and various related model tests and numerical analysis studies have been conducted. In this study, the GPR signal characteristics for tunnel lining model testing were analyzed using gprMax software, which was compared with model test results. The numerical model applied to the model test reasonably simulated the electromagnetic wave signal according to the change of the material such as tunnel lining and internal cavity. Using the verified GPR model, B-scan data for the development of the GPR signal analysis technique were obtained, which can evaluate the thickness of the tunnel lining, the presence of the cavity, the effect of the waterproof membrane, and the frequency band.

• Ecology and Resilient Infrastructure
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• v.10 no.4
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• pp.125-134
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• 2023

In order to develop a backtracking technique for turbidity measurement data without discriminatory characteristics, three turbidity backtracking techniques for predicting inflow turbidity of a stream were compared using real-time turbidity data measured at automatic water quality measurement points located upstream and downstream of the stream and the Py_STPS model. Three turbidity backtracking techniques were applied: 1) simple preservation method of turbidity load considering flow time, 2) a method of using the flow rate at the upstream boundary considering the flow time as the flow rate at the downstream boundary, 3) method of introducing internal reaction rate to reflect the behavior characteristics of turbidity-causing substances. As a result of applying the three backtracking models, it was confirmed that the backtracking technique that introduced the internal reaction rate had the best results.

• Journal of Digital Convergence
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• v.13 no.10
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• pp.459-470
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• 2015

The study was conducted to find out way that improves service quality for external customers by identifying the impact of Total Quality Management(TQM) on the internal customer satisfaction and then raising the personnel satisfaction measurement in medical institutions. To this end, we carried out a survey of 500 employees from five university hospitals in three metropolitan cities of Busan, Deagu and Ulsan and Gyeongsangnam-do province from February 2 to April 30, 2015, and utilized 476 cases for this study finally. First, in the result of analysis, the leadership of management hierarchy affects education and training and employee participation, but not human resource management nor quality of the work among quality management activities. Secondly, the culture of medical service organization has an effect on every variable of quality management activities. And finally, internal customer satisfaction is influenced by quality management activities, the leadership of management hierarchy and the culture of medical service organization.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.725-728
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• 2009

This paper describes remote monitoring system for the various environments of a vinyl house, which was located in rural or outer of urban by use internet web connection system in a long distance office. We have constructed remote monitoring system by use a simple experimental model for the monitoring of various factors which need to operate common vinyl house. The experimental model includes temperature, humidity, smoke and infrared sensors for the measuring and AC 220V light bulb for the controlling in the USN system. Also, we have developed monitoring software by use NI Labview and communicate between PC and sensors through the DAQ-board, USN control board. We use CCD camera and grab board for the real time remote monitoring of wanted image in the house area. The computer server for remote connection is constructed in the local PC with Apache web server, PHP and MySQL ODBC. We construct internet communication system for the monitoring remotely the local environments of a vinyl house system.

• Plant Journal
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• v.15 no.2
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• pp.56-61
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• 2019

In this study, the failure analysis of the internal tube occurred in the high pressure feedwater heater for power generation boiler of 500 MW supercritical pressure coal fired power plant was investigated. I suggested a prediction model that can diagnose internal tube failure by changing the position of level control valve on the shell side and the suction flow rate of the boiler feedwater pump. The suggested prediction model is demonstrated through additional cases of feedwater system unbalance. The simultaneous comparison of the shell side level control valve position and the suction flow rate of the boiler feedwater pump compared to the normal operating state value, even in the case of the high pressure feedwater heater for the power boiler, It can be a powerful prediction diagnosis.

• Journal of Korea Entertainment Industry Association
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• v.13 no.3
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• pp.169-180
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• 2019

The purpose of this study was to draw theoretical and practical implications applicable to the field through structural equation modeling of internal marketing, organizational trust, customer orientation and job performance to promote spectators of professional football. In order to achieve the aim of this study, we surveyed 12 S. Korea professional football clubs' employees(216 effective sample). Seven hypotheses were verified using frequency analysis, correlation analysis, reliability analysis, confirmatory factor analysis, path analysis and structural equation modeling through SPSS and AMOS statistics. The results are as follows. First, internal marketing had a positive effect on customer orientation. Second, internal marketing had a positive effect on job satisfaction. Third, internal marketing had a positive effect on organizational trust. Fourth, organizational trust had a positive effect on customer orientation. Fifth, organizational trust had a positive effect on job satisfaction. Sixth, organizational trust was found to partially mediate relationship between internal marketing and customer orientation. Seventh, organizational trust was found to partially mediate relationship between internal marketing and job satisfaction.

• 한국경영정보학회:학술대회논문집
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• 2007.11a
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• pp.111-116
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• 2007

체계적인 정보화 투자 및 관리를 위한 전사적 아키텍처(EA)를 도입한 기관과 기업이 늘어남에 따라, EA 도입의 성과를 명확하게 평가해야 할 필요성도 높아지고 있다. EA를 도입한 나라의 약 36%에서 EA의 도입 현황과 성과를 측정하고 있으며, 국내에서도 범정부 정보기술아키텍처 성숙도 평가모형을 개발하는 등, 다양한 접근 방법으로 EA 평가를 위한 방안을 연구하고 있다. 그러나 EA를 통해 추구하는 목적이 매우 다양하고, EA의 활용과 관리에 대한 표준체계가 없어 EA 평가모형의 적용 범위와 효용성은 매우 제한적이다. 본 연구는 조직의 EA 평가목적에 적합한 평가 대상 및 척도를 체계적으로 도출하기 위한 EA 평가모형 개발 프레임워크를 제안한다. 프레임워크는 IEEE Std 1471의 아키텍처 표현 개념 프레임워크를 EA에 적용하여 EA 평가모형 체계를 구성하고, EA 내부와 외부 이해당사자의 관심사항을 토대로 GQM 기법을 적용하여 EA 평가의 대상인 관점(viewpoint)과 평가 척도(metric)를 도출한다. 제안된 프레임워크를 적용하면 기업 및 조직의 EA 이해당사자가 의도하는 목적이 반영된 EA 평가모형을 개발할 수 있다. 모형의 상세화와 더불어 프레임워크를 실무에 적용하기 위해서 필요한 객관적인 평가기준과 모형 개발과 적용을 지원하는 도구에 대한 연구가 향후 과제이다.