• The Journal of the Korea Contents Association
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• v.11 no.2
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• pp.126-134
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• 2011

Recently, many researchers are interested in using join queries to correlate sensor readings stored in different regions. In the conventional algorithm, the preliminary join coordinator collects the synopsis from sensor nodes and determines a set of sensor readings that are required for processing the join query. Then, the base station collects only a part of sensor readings instead of whole readings and performs the final join process. However, it has a problem that incurs communication overhead for processing the preliminary join. In this paper, we propose a novel energy-efficient in-network join scheme that solves such a problem. The proposed scheme determines a preliminary join coordinator located to minimize the communication cost for the preliminary join. The coordinator prunes data that do not contribute to the join result and performs the compression of sensor readings in the early stage of the join processing. Therefore, the base station just collects a part of compressed sensor readings with the decompression table and determines the join result from them. In the result, the proposed scheme reduces communication costs for the preliminary join processing and prolongs the network lifetime.

• The Journal of the Korea Contents Association
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• v.16 no.4
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• pp.594-603
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• 2016

This study analyzed that introduction function and program how influence about quality of life local resident and development of region according to real development. Also, it suggested policy implications of area activation plan through complex development of railway station area. In research method, the factor and structure affecting area activation in complex development of railway station area analyzed positively using the PLS structural equation focused on citizen near station area. As a result of study, in regional economic vitalization, the factors of software(marketing support, transfer system support, plan and design support, complex development support, law institution improvement, etc) and the factors of hardware(traffic function, information exchange function, commercial business function, housing features, amenity function, etc) are represented to influence significantly and then, in quality of life of local resident, the factor of hardware analyzed to influence significantly, but the factor of software and network did not. In comparison, the factor of network is represented that it did not contributed in regional economic vitalization and quality of life of local resident. So, political supplementations are needed.

• The Journal of the Korea Contents Association
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• v.8 no.11
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• pp.263-271
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• 2008

In the outwardly changing environment of public security these days, police administration faces the nation's request for qualitative improvement of police service and the new request of police reformation for changing function of police in Korea. The nation wishes police to provide service fairly. The issue most seriously mentioned in the reliability of police service is very large gap in the recognition of service quality between supplier and consumer. To get the trust of nation in delivering police service, the police must have justness, consistency, punctuality of delivery, propriety and efficiency. However, the recognition of citizen, the consumer of police service is more important. How to correspond to the nation's request to police needs to be decided by evaluating the quality of present police service. It is necessary to be interested in what customer wants so as to evaluate the quality of police activity.

• The Journal of the Korea Contents Association
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• v.20 no.3
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• pp.18-30
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• 2020

Recently, as graph-structured data is widely used in various fields such as social networks and semantic Webs, needs for an effective and efficient search on a large amount of graph data have been increasing. Previous keyword-based search methods often find results by considering only the relevance to a given query. However, they are likely to produce semantically similar results by selecting answers which have high query relevance but share the same content nodes. To improve the diversity of search results, we propose a top-k search method that finds a set of subtrees which are not only relevant but also diverse in terms of the content nodes by controlling their similarity. We define a criterion for a set of diverse answer trees and design two kinds of diversified top-k search algorithms which are based on incremental enumeration and A^⁎ heuristic search, respectively. We also suggest an improvement on the A^⁎ search algorithm to enhance its performance. We show by experiments using real data sets that the proposed heuristic search method can find relevant answers with diverse content nodes efficiently.

• Journal of Digital Convergence
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• v.9 no.5
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• pp.99-111
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• 2011

Nowadays, the rapid progress and worldwide use of smart-media(SNS) has resulted in coming of the smart media convergence age. In practice, however, the effectiveness of smart media convergence society is limited by the difficulties of using it, which include accessibility, waiting for loading, clutter, old information, privacy risks, expensive communication, etc. The conquest of these difficulties must be policy target of broadcasting and telecommunication for high quality of communication life. From this perspective, this paper proposes a new policy of broadcasting and telecommunication based on the dynamic quality of life for the smart media convergence society. This smart convergence policy will not promote only the development and production of smart media contents but also its stable supply and it will secure the accessibility and privacy. In conclusion, this paper reveals that the components of quality of life are important elements of broadcasting and communication policies which will eventually lead to the popular use of smart media and enhance its quality.

• The Journal of the Korea Contents Association
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• v.16 no.12
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• pp.761-771
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• 2016

This study is significant for its proposed health care quality improvement methods to study the relationship between the medical service quality and customer loyalty in the regional hub public hospital. The subjects were selected 604 people who visited the regional hub public hospital to customers from June 9 to June 30, 2014 as the final survey. The analysis was conducted hierarchical regression analysis to identify factors affecting the reliability factor analysis and customer loyalty. In conclusion showed that accessibility factors affecting customer loyalty, awareness hospital, the perceived value of cost-effectiveness, human services on a significant impact. The regional hub public hospitals by focusing efforts I have a continuity of customer care through constant management in order to provide quality health care, increase the frequency of use and loyalty are needed.

• Journal of Digital Contents Society
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• v.18 no.2
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• pp.339-346
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• 2017

There is increasing interest in text analysis based on unstructured data such as articles and comments, questions and answers. This is because they can be used to identify, evaluate, predict, and recommend features from unstructured text data, which is the opinion of people. The same holds true for TEL, where the MOOC service has evolved to automate debating, questioning and answering services based on the teaching-learning support system in order to generate question topics and to automatically classify the topics relevant to new questions based on question and answer data accumulated in the system. Therefore, in this study, we propose topic modeling using LDA to automatically classify new query topics. The proposed method enables the generation of a dictionary of question topics and the automatic classification of topics relevant to new questions. Experimentation showed high automatic classification of over 0.7 in some queries. The more new queries were included in the various topics, the better the automatic classification results.

• The Journal of the Korea Contents Association
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• v.17 no.9
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• pp.597-605
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• 2017

Although the medicine is developed to support the quality of treatment, if we do not increase the quality of health care for customer satisfaction, customer satisfaction does not rise any more. The competitiveness of the hospital slows down since the visitor to the hospital is reduced. It is medical reason that the focus of the medical information moves from doctors to customers. This study analyzed websites, the private hospital located in Busan. The websites provide contact information; web-based information from health services is increasing. Statistical analysis was carried out cross analysis using available variables on websites by using the SPSS 21.0 for Version. Departments were also significant, depending on the health services by the external contact elements and contact elements designed to study the problem in analyzing the results presented in this study. This means the contact is different by departments. The results of this study is to better consider the Departments website when making specific characteristics we expect the increase of health care quality and patient satisfaction.

• The Journal of the Korea Contents Association
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• v.9 no.9
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• pp.313-324
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• 2009

This study purposes to analyze how the level of compensation system qualify(transparency, fairness, controllability) affects the satisfaction of employee concerned with compensation system and work efforts. To test above mentioned objectives, i conduct using the survey data directly survey and e-mail to the MBA students of university located In southeastern korea and analyze using the structural equation model. The results of this paper are as follows. First, the analysis results demonstrate a positive relationship between the level of compensation system qualify and the satisfaction of employee concerned with compensation system. Second, the level of compensation system quality positively affects employee' work efforts. Thirdly, the satisfaction of employee concerned with compensation system also positive effects on work effort. The above results mean that if the level of compensation system quality is higher, employee are satisfied with the compensation system, and increase the level of work effort.

• The Journal of the Korea Contents Association
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• v.15 no.1
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• pp.9-23
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• 2015

In this paper, we propose a new RDF index scheme considering the characteristics of large scale RDF data to improve the query processing performance. The proposed index scheme creates a S-O index for subjects and objects since the subjects and objects of RDF triples are used redundantly. In order to reduce the total size of the index, it constructs a P index for the relatively small number of predicates in RDF triples separately. If a query contains the predicate, we first searches the P index since its size is relatively smaller compared to the S-O index. Otherwise, we first searches the S-O index. It is shown through performance evaluation that the proposed scheme outperforms the existing scheme in terms of the query processing time.