• The Journal of The Korea Institute of Intelligent Transport Systems
• /
• v.8 no.3
• /
• pp.100-111
• /
• 2009

Cognitive radio is an advanced technology for efficient utilization of under-utilized spectrum via spectrum sensing. CR users should move from current allocating channel to empty channel to avoid the interference to the primary user if the primary user is allocating that channel. Thus, CR system cannot support the CR user's QoS(Quaiity of Service). In this paper, we propose dynamic frequency selection method based on Genetic Algorithm with power control. It is to find the optimization channel for satisfying various CR user's needs with the power control method to minimize the CR user's interference to the primary user. And, we propose the Genetic Algorithm(GA) which determines the best configuration for CR communication systems. The computer simulation results show that the proposed method guaranteed the primary user's decodability and the optimized solution for various channel status.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.17 no.2
• /
• pp.159-164
• /
• 2017

Existing employment information system is the result of a number of lists list exists is difficult to determine at a glance when a user searches for a desired jobs. The service used for the strengthening and enhancement of job satisfaction, job seekers in the problems of the existing system, there is a need to improve measures for improving the quality of the environment. In this paper, we developed a system using a mashup Jobs feature that allows users to easily and conveniently search the various regions, the conditions specific jobs you want on the web map. In this paper, we collect the RSS of employment related information from many employment information providers, and we have a mashup function that makes it easy and convenient to search various regional and conditional job information desired by the user on the web map I have developed a job information system that I used.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.18 no.4
• /
• pp.131-142
• /
• 2018

In Korea, for the past 50 years, industrial parks have played an important role in economic growth as a cluster of national key industries. However, due to various problems of these old industrial parks, they are weakening competitiveness. It is necessary to be converted into a model for the management and fostering of high-tech industrial complex park by classifying them into development plans, management plans, and support plans according to types and characteristics of industrial parks. For this purpose, we propose CIPs (Connected-Industrial parks) using new technologies such as Cloud Computing, RFID, WSN, CPS, and Big Data analysis based on IoT. It is a hub that supports various services in transportation, warehousing and manufacturing fields while possessing and operating physical assets as concept. each CIP (Connected-Industrial park) is connected and expanded Through such CIPs, network-type collaborative manufacturing and intelligent logistics innovation enables cost reduction, delivery shortening, quality improvement.

• The Journal of the Institute of Internet, Broadcasting and Communication
• /
• v.20 no.5
• /
• pp.39-43
• /
• 2020

In this paper, we propose the multi-channel interference cancellation algorithm for visible light communication (VLC) in smart building. The VLC system is communication technology using visible rays that come out in Light Emitting Diode (LED) device. It has energy curtailment effect and possible to use in ubiquitous network service applications. When a large number of users communicate indoors, the performance can be reduced due to channel interference. To remove interference, at the first, the minimum mean square error (MMSE) scheme as interference cancellation methods used, and then the successive interference cancellation (SIC) is applied to obtain additional diversity gain and improve interference cancellation performance. Indoor VLC channel model is employed. The performance is evaluated in terms of bit error rate (BER). From the simulation results, it is confirmed that the proposed scheme has better BER performance compared to the previous systems. As a result, the proposed interference cancellation improves the signal quality of VLC systems by effectively removing the channel noise. The results of the paper can be applied to VLC for smart building and general communication systems.

• International Commerce and Information Review
• /
• v.6 no.2
• /
• pp.361-384
• /
• 2004

Recently the port logistics service has been recognized as a important function of the international logistics, therefore, a lot of papers have been issued concerning the measurement of the service quality of that. But in spite of variety of papers, we can not find out the papers concerning the model of the synthetic customer satisfaction. And also the most of papers concerning the customer satisfaction of service quality have been focused not by cognitive evaluation of the customer, but by affective response. In this thesis, the authors are postulating the model and hypothesis to achieve the research by using the Gr$\"{o}$nroos's model. In order to research the relationship between the port logistics service quality and the customers satisfaction, we are selecting the shipping companies located in Busan and Kwangyang as purchaser and the loading and unloading companies as supplier, and the questionnaires was performed to them. In the result of the empirical study, the technical quality of the port logistics service are affecting directly on the customer satisfaction, but the functional quality are affecting not directly on the customer satisfaction. And also the customer response(affective response) has been proved that it has been exercised as a intermediate role between the port logistics service quality and the customer satisfaction. Therefore it is proved that the affective response of the customer has been exercised a crucial role in the course of supplying the port logistics service.

• Culinary science and hospitality research
• /
• v.10 no.1
• /
• pp.14-31
• /
• 2004

The purposes of this study are to find influential factors on relations between customer quality and service quality of hotel foods & beverages, to find out factors influencing on customers' intention to revisit, to understand suggestive points in the side of operation of hotel's foods & beverages, and to offer basal materials for establishing marketing for hotel operators. The study results were proved followings; in factors of customer quality, the higher factors of customers' manner·etiquette, the higher pleasantness, trust, kindness, among factors of service quality of hotel foods & beverages. The higher factor of customers' social status, the higher typicalness, pleasantness, trust, kindness, among factors of service quality of hotel foods & beverages. The higher customers' economic level, the higher pleasantness, trust, kindness. The higher customers' manner·etiquette, customers' social status, customers' economic level, at corners selling foods & beverages in hotels, the higher typicalness, pleasantness, trust, kindness, among factors of service quality of hotel foods & beverages, the higher customers' intention to revisit. Therefore, in order to improve services of corners selling foods & beverages in hotels, customer quality must improve, and marketing strategies proper for maintaining improved customer quality. As customers think much of hotel employees' service quality, kindness, and care, kind and skillful employees need be distributed in hotels. In order to elevate quality of employees working at corners selling foods & beverages in hotels, which is adequate for images of hotels, supervisors of companies or relevant departments must implement the reward system to encourage hotel employees to work at parts adequate for employees' individual ability as well as get feeling of accomplishment, in order for employees to keep liveliness and self-confidence.

• Culinary science and hospitality research
• /
• v.20 no.3
• /
• pp.171-185
• /
• 2014

This research investigates the causal relationships between the selection attributes of coffee shops and customer value and revisit intention. To do this, the statistics programs SPSS 18.0 and AMOS 18.0 were used targeting 218 college students from three universities (K, D, Y) in the Busan area. Frequency analysis, explanatory factor analysis, confirmatory factor analysis, correlation analysis, and structure model analysis for hypothesis verification were conducted to analyze the data. Based on the results of exploratory factor analysis, five factors were drawn as quality of coffee, indoor environment, service, discount, and brand. Model fidelity and validity was confirmed by implementing the confirmatory factor analysis. In addition, results of structure model analysis confirmed partial relationships among the selection attributes of the college students regarding coffee shops, customer value, and revisit intention. Furthermore, a positive relationship between customer value and revisit intention was also confirmed. Thus, this research suggests that coffee shop managers should manage in a way that customers may acknowledge the value of the expenses they pay.

• Journal of Information Technology Applications and Management
• /
• v.21 no.2
• /
• pp.81-98
• /
• 2014

Recently, due to external environment like the changes in health policy and various healthcare accreditations, along with hospital's internal efforts to improve the quality of medical services, demands for the development of medical information systems are increasing. Some examples are clinical information like DUR (Drug Utilization Review), CVR (Critical Value Report), and automatic benefit processing by treatment purposes, or hospital DSS (Decision Support System) on overall medical practice. Such systems act as a guide in making clinic judgments during practice or in other medical practice, and their effects on the medical treatment improvements are being proven by previous studies. In the reality of increasing attention in the effects of medical treatment improvement, studies related to hospital DDS were mostly focused on clinical, technical, and engineering points of view, and studies focusing on the user viewpoint are very limited. In order to verify the effects of DSS on practice improvements and hospital's management performance, this study used a research model constructed to verify how SERVQUAL of hospital DSS affects hospital management performance in BSC (Balanced Score Card) point of view. To empirically verify the research model, a questionnaire was conducted on the basis of "K-University Hospital's DSS" on clinicians and hospital employees related to system development, and the relationships between the factors were analyzed through path analysis. As a result of path analysis, excluding reactivity, tangibility, confidence, reliability, empathy among service qualities, had partially significant effects on management performance factors (learning and growth, internal process, financial affairs). This study is to prepare the theoretical ground on the management performance analysis of hospital DSS, and suggest the service quality of the system that should be considered in the planning and development stages for improved system.

• Korea Journal of Hospital Management
• /
• v.22 no.3
• /
• pp.18-30
• /
• 2017

This study was performed to analyze systematically and validate empirically the influence of korean medicine service quality on satisfaction factors and revisiting intention. The candidates were patients visiting the one korean medicine hospital in Gyeongnam. We took a direct survey collected during 15 days May 1 to 15, 2016. For the survey I distributed a total of 250 questionnaire and used the final 230 of them in verifying this research model except unreliable data. The collected data were used statistics program SPSS WIN 22.0 and the research model were examined by AMOS 18.0. The main research results are follows. First, the most influencing factors on consumer satisfaction were public image factors and then human factors. and then effectiveness factors. Second, the most influencing factors on reuse intention were public image factors and then physical factors. Third, human and effectiveness factors of service quality factors in korean medicine hospital did not effect on revisiting intention directly but, effected on revisiting intention through mediation role of the customer satisfaction. Forth, satisfaction on the significant effect on reuse intention. so satisfaction has proved to be a important factor for reuse intention. The results of this study are expected to contribute to management efficiency and developmental improvement on korean medicine hospital policy and management efficiency and be used as a basis for leading to national health promotion through the development of korean medicine service.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.8 no.6
• /
• pp.1060-1067
• /
• 2004

In a CDMA system, the rapacity is variable and mainly depends on multiple access interference. The multiple access interference has a deep relationship with transmitted or received power. The capacity of CDMA2000 1x system is considered to be limited by the forward link capacity. In this paper, we show that the transmitted power can represent the total cell load and we propose a load control scheme for CDMA2000 1x system. CDMA2000 1x system has fast power control scheme and we can measure forward link cell load by using total transmitted power. In the proposed algorithm, by monitoring the total transmit power, we can simply adjust data rate to channel conditions and efficiently use radio resources. The proposed algorithm is practical algorithm to implement in the power controlled CDMA systems and enhances the system throughput and quality of service(QoS)