• Proceedings of the Korean Society of Precision Engineering Conference
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• 2002.05a
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• pp.263-266
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• 2002

An optical method for surface roughness estimation based on statistical analysis of the light intensity of a scattered laser beam pattern. The method is very simple but has a disadvantage that no more information than the averaged roughness is estimated. In this study a new try was conducted to derive more advanced surface information from the details of the light intensity distribution. Some periodic ripples among the light intensity distribution being assumed to relate with scratch left on the machined surface, a corresponding surface profile is estimated from the ripples using FFT and IFFT algorithm. IFFT technique is used to extract some dominant signal components among the intensity distribution. Compared to the measured profiles by a stylus type surf-tester, the profiles obtained through the proposed method are probably acceptable in a sense of the profile shape. Calibration of the amplitude needs more works in the future.

• Journal of Korean Institute of Industrial Engineers
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• v.28 no.1
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• pp.105-111
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• 2002

When transporting multiple items by trucks of various size, one needs to assign a group of items to each truck so as to minimize the total cost, while meeting the weight and volume constraint of each truck. In this paper, we formulate the problem as an integer programming problem and propose four heuristic algorithms for the problem. Computer simulation is used to evaluate the average performance of the four heuristic algorithms for the consolidated transportation problem.

• Journal of Korean Library and Information Science Society
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• v.30 no.4
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• pp.183-206
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• 1999

The purpose of this research is to evaluate the service quality measure and service quality level between one sample library and the other. Most typically, service quality is defined in terms of reducing the gap between customer expectations and the actual service provided. This research also focuses on gap reduction. Service quality concept was originally discussed in a commercial environment and may require some adaptation to the non-commercial environment of the academic library. A revised service quality measure that developed by P. J. Calvert and P. Hernon(1996) was used for this research. Results showed that service quality measure of this research was reliable(99 service quality items scale's Cronbach Alpha coefficient was 0.983) and was validated by correlation and factor analysis. Therefore service quality measure of this research will be applied positively for academic libraries. And this research showed that the service quality level of sample academic library was inferior to that of the others. The service quality of sample academic library should be improved to meet the customer's needs and expectations immediately.

• Journal of information and communication convergence engineering
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• v.9 no.2
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• pp.129-134
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• 2011

Nowadays, most of exhibits are material antiquities while the exhibit of intangible cultural heritage is deficient and the form is less advanced which cannot meet the exhibition needs of digital times. This has resulted in insufficient display of intangible heritage's value which may not facilitate inherit and protection of intangible heritage, no other than protection mechanism of forming healthy industrialization. This article has established digital exhibition mode in museum about intangible cultural heritage by analysis on current museum and using mobile communication and augmented reality techniques. Discuss the mode in the layer integrating creative industry and mobile industry and provide practicable reference project of forming the healthy industrialization mechanism for protecting intangible heritage.

• Journal of Multimedia Information System
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• v.2 no.2
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• pp.241-248
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• 2015

The safety-critical software in healthcare systems needs more and more perceptive excess among human observation and computer support. It is a challenging conversion that we are fronting in confirming security in healthcare systems. Held in the center are the patients-the most important receivers of care. Patient injuries and fatalities connected to health information technologies commonly show up in the news, contrasted with tales of how health experts are being provided financial motivation to approve the products that may be generating damage. Those events are unbelievable and terrifying, however they emphasize on a crucial issue and understanding that we have to be more careful for the safety and protection of our patients.

• International Commerce and Information Review
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• v.8 no.3
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• pp.99-119
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• 2006

The recent trend in the payment terms of international trade shows the gradual shift toward more diversified payment methods (from L/C to not L/C) in order to cope with the increasingly dynamic international transactions in a more flexible manner. The reasons behind this recent shift are as follows : first, the global trade market is breaking away from the traditional L/C methods based on letters of credit toward a not L/C methods. nother reason for the changing trade payment methods is the increasing volume of intra transactions between headquarters and their foreign subsidiaries based on collection payment methods. Having mentioned the above problems that impede the Korean export insurance system, some suggestions can be put forward through a comparative analysis with foreign export insurance system. First, inducing private investments is one way of strengthening financial health of the KEIC. The KEIC also needs to diversify its insurance coverage adapting to the changing international trade environments.

• Journal of the Korean Data and Information Science Society
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• v.19 no.1
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• pp.71-83
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• 2008

Assessing local government performance has become a crucial issue in recent years. This paper addresses the satisfaction level of local government public service, which is defined as a degree of the results or the impacts of the local government public service delivery on the citizen's needs, demands and expectations. The satisfaction level of local government public service can improve decisions made by local government managers, and enhance accountability of local government to the citizens they serve. This study focuses especially on the various aspects of administrative systems in a local government and developed a systematic survey for their performance. Explanations for the evaluation items and the analysis of survey are discussed throughout the paper.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.5
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• pp.259-264
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• 2010

In this paper, for supporting more variable services than typical DSRC, brand call service, truck and an official vehicle services, etc. using location information and mobile communication network could be adapted. emergence helping information providing, multimedia service that are wireless internet, movies and games, are increasingly needed for competible wireless car mobile terminal. Those needs would make a development a wireless telemetries system based on WiBro interface in ubiquitous vehicle environment. We analysis the proposed telematics mobile terminal using simulation which is concerned about fixed bandwidth and dynamic bandwidth.

• The Transactions of the Korea Information Processing Society
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• v.2 no.2
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• pp.148-155
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• 1995

When we analize many amount of patterns, it is necessary for these patterns are to be clustering into several groups according to a certain evaluation function. This process, in case that there are lots of input patterns, needs a considerable amount of computations and is reqired parallel algorithm for these. To solve this problem, this paper propose parallel clustering algorithm which parallelized k-means algorithm and implemented it under the MIMD parallel computer based message passing. The result is through the experiment and performance analysis, that this parallel algorithm is appropriate in case these are many input patterns.

• Journal of Korea Multimedia Society
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• v.20 no.2
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• pp.429-436
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• 2017

This study was attempted to improve the utilization of kiosk DID and to establish the production direction of the kiosk DID to be developed in the future, through analysis of kiosk DID user satisfaction at bus stop. This study showed that the satisfaction of the usability of the bus stop kiosk DID was high but in order to enhance the active use of kiosk DID and user satisfaction, unique and interesting content needs to be added and switched, not just simple information but content that users will immerse.