• The Journal of Korean Institute of Communications and Information Sciences
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• v.22 no.12
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• pp.2783-2797
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• 1997

This paper proposes a new motion estimation algorithm that employs matching in a variable search area. Instead of uisg a fixed search range for coarse motion estimation, we examine a varying search range, which is determined adaptively by the peak signal to noise ratio (PSNR) of the frame difference. The hexagonal matching method is one of the refined methods in image warping. It produces improved image quality, but it requires a large amount of computataions. The proposed adaptive partial matching method reduces computational complexity below about 50% of the hexagonal matching method, while maintaining the image quality comparable. The performance of two motion compensation methods, which combine the affine or bilinear transformation with the proposed motion estimation algorithm, is evaluated based on the following criteria:computtational complexity, number of coding bits, and reconstructed image quality. The quality of reconstructed images by the proposed method is substantially improved relative to the conventional BMA method, and is comparable to the full hexagonal matching method;in addition, computational complexity and the number of coding bits are reduced significantly.

• Korean Journal of Community Nutrition
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• v.11 no.6
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• pp.750-760
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• 2006

This study was designed to investigate the correlation between perceived TQM performance and job satisfaction of dietitians. The objective of the study is to help the management of foodservice by providing a direction which will elevate perceived TQM performance of dietitians and presenting plans which will ensure effective foodservice management. The survey sample was dietitians (n = 308) who were charged with foodservice management. The questionnaires requested information about demographics self-perception of TQM importance and performance levels, and Job satisfaction. According to the TQM importance and performance analysis, the level of performance was typically high in TQM items recognized as important by dietitians and low in areas where the recognized level of importance was low. Analysis was conducted on the job satisfaction according to demographic characteristics. The level of satisfaction in terms of salary and promotion increased relatively for those working in the industries and those who were older, married, and full-time employees with longer careers. The lesser the number of working hours, the higher their satisfaction levels were. Canonical correlation analysis between TQM performance and job satisfaction indicated higher canonical correlation (canonical correlations coefficient: 0.59). In conclusion, TQM performance-job satisfaction showed higher canonical correlation. When information exchange via network is made possible and more external customer recognition is gained, it increases the level of job satisfaction. The above results suggest that further research on the scope of TQM performance is thoroughly needed and continual training is necessary for foodservice managers.

• Journal of the Korean Society of Clothing and Textiles
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• v.26 no.8
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• pp.1286-1297
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• 2002

This study was aimed at conducting a survey and analyzing its results on the purchase and wearing conditions and design preference of sports casual wear among women and men in their twenties and thirties according to region, gender, age and income. The survey was administered using a website and was conducted among the persons who purchased sports casual wear more than once a year. The statistical results were analyzed from 497 questionnaires of respondents residing in Seoul, Gyeonggi Province, six metropolitan cities and other cities and provinces. The results of this study were summarized as follows. 1) Results of wearing conditions and preference of sports casual wear : The respondents of the survey answered that they had purchased 1 or 2 clothing items for a year and the order of buying the popular wear ranked sport shirt, jacket, trousers respectively. They chose mostly shades of gray, and the most favored design type were a chin collar, a set-in sleeves, a mixed type of band cuffs and elastic band, side zip-pockets, a full-zip front fastener, alight warm-up hood, and a small front upper chest type logo; 2)Analysis of the differences in purchase and wearing conditions in accordance with region, gender, age and income : The largest proportion of respondents who answered thar had purchased 4 or more clothing items for a year were Seoul residents and in particular the residents south of the Han river. The customers under thirty usually obtained their information about sports casual wear by visiting stores in person. The men obtain a variety of information through printed materials and related Internet sites; 3) Analysis of preferential differences of the detailed partial design : The purchasers in their 20's preferred black white, and gray patterns, however that preference shifted for those in their late 20's and the preference for pastel colors increased. The purchasers in their 20's and mid 30's had a preference for a chin collar and an eight-shaped zip type pockets. The men preferred a band cuff and a detachable hood type but women favored an elastic band and a light warm-up hood type.

• Journal of the Society of Disaster Information
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• v.9 no.2
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• pp.178-187
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• 2013

This paper studied the potential risk of high-rise apartment by analysis of the loss ratio of housing fire insurance, statistics related high-rise apartment fire, and the insured amount of housing fire insurance, and, found that it is so high and need the improvement of risk management measures for high-rise apartment. Accordingly, the study recommend the composit risk management measures including preventing of fire expanding for higher stories, a shelter for people of hire-rise apartment, and sprinkler protection, etc. Also as risk transfer measures, the composit risk measures for high-rise apartment includes the full insurance of housing fire insurance, third party property liability insurance, and development of endorsement for special risk such as a typhoon, liability etc.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2006.05a
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• pp.847-850
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• 2006

Special skills and aptitude education which cultivates special skills and aptitude of students in widely implemented in elementary schools as a part of extracurricular activities after classes. This research is designed to find out improved operations in elementary schools' special skills and aptitude education activities by examining and analyzing the current situation. A survey of teachers and students was conducted on the teachers' interests in the special skills and aptitude education as well as on the participation level of students. In order to systematically operate and to vitalize the special skills and aptitude education, there should be full support and continuous interest from the Ministry of Education. In addition, hosting school's interests such as interlinking with other schools and attending exhibitions are important to maximize the effect of student's computer skills and aptitude education.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.11
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• pp.2534-2539
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• 2015

Method for regulating voltage using a generator voltage regulating device (AVR) is divided in an existing analog system and a digital replacement. Typically, to adjust the voltage by using a brushless excitation system of the type to be reduced for a voltage change under all. The control method of the AVR as a PID (proportional-integral-differential) control method is widely used. However, the control scheme is to reduce the transient response of the control parameters of the controller to the control object. Therefore, if the control target should change, there is a problem, reset the parameters of the controller again. In this study, without having to reset the parameters of the controller for the parameter variations to be controlled iPID (intelligent PID) using a controller designed to obtain a generator AVR system voltage variation is small in response to full load is applied to and through simulations and experiments improved transient response.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.17 no.12
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• pp.2865-2874
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• 2013

Recently, most of movies top-ranked in the box office are screening in Stereoscopic 3D, and the world's leading electronics companies such as Samsung and LG are getting the hots for 3DTV sales. However, each person has different binocular disparity and different viewing distance, and thus he or she feels the severe visual fatigue and headaches if he or she is watching 3D content with the same binocular disparity, which is very different from things he or she feels in the real world. To solve this problem, this paper proposes and implement a 3D rendering system that correct the disparity of 3D content by reflecting binocular distance and viewing distance. Then, the computational complexity is analyzed. Optical-flow and Warping algorithms turn out to consume 732 seconds and 5.7 seconds per frame, respectively. Therefore, a dedicated chip-set for both blocks is strongly required for real-time HD 3D display.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.571-572
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• 2017

The blockchain technology that implements electronic money uses decentralized computing and all transactions in a blockchain are open to everyone. This technique seems to guarantee anonymity by performing the transaction on the address instead of the user, but by using direction acyclic graph based on the transaction graph, the privacy problem is caused by tracking the addresses. In this paper, we analyze various techniques for centralized processing which makes it difficult to find the relevance on the graph in order to protect the privacy in the block chain technology. We also analyze the techniques of anonymizing in a distributed way to enhance privacy. Using the zero knowledge proof scheme guarantees full distributed anonymity but requires more computation and storage space, and various techniques to make this efficient are proposed. In this paper, we propose a privacy protection scheme of blockchain technology to integrate existing privacy protection techniques into a blockchain technology and perform it more efficiently with a centralized or decentralized technique.

• Journal of KIISE:Information Networking
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• v.36 no.3
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• pp.184-190
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• 2009

WiBro has advantages when both WLAN and 3G UMTS are adopted. Much research is being carried out in this area. However, the WiBro specification does not consider end-to-end security. Hence, another security protocol has to be adopted to support secure communication. Most previous research only focused on WiBro MAC performance improvement or security. In this paper, we adopt a security protocol such as IPsec, TLS, and DTLS, well known end-to-end security protocols, to make full use of WiBro in the IP network. Using NS-2 we simulated the adoption of end-to-end security protocol and evaluated performance and usability. Simulation shows DTLS had some performance advantages. All the protocols, TLS and IPsec are also suitable for use in WiBro.

• The Transactions of the Korea Information Processing Society
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• v.6 no.7
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• pp.1929-1940
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• 1999

In this paper a VLSI design for the automatic magnetizing and inspection system has been presented. This is a design of a peripheral controller, which magnetizes CRTs and computer monitors and controls the automatic inspection system. We implemented a programmable peripheral interface(PPI) circuit of the control and protocol module for the magnetizer controller by using a 0.8um CMOS SOG technology of ETRI. Most of the PPI functions have been confirmed. In the conventional method, the propagation/ramp delay model was used to predict the delay of cells, but used to model on only a single cell. Later, a modified "linear delay predict model" was suggested in the LODECAP(LOgic DEsign CAPture) by adding some factors to the prior model. But this has not a full model on the delay chain. In this paper a new " delay predict equation" for the design of the timing control block in PPI system has been suggested. We have described the detail method on a design of delay chain block according to the extracted equation and applied this method to the timing control block design. And we had descriptions on the other blocks of this system.