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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of the Korea society of IT services
Journal Basic Information
Journal DOI :
The Korea Society of Information Technology Services
Editor in Chief :
Lim Gyu Geon
Volume & Issues
Volume 9, Issue 4 - Dec 2010
Volume 9, Issue 3 - Sep 2010
Volume 9, Issue 2 - Jun 2010
Volume 9, Issue 1 - Mar 2010
Selecting the target year
The Effect of Mobile Customer Center's Quality Factors on Customer Satisfaction, Trust and Loyalty
Kim, Chang-Soo ; Lee, In-Seok ; Ryu, Hei-In ; Lee, Sung-Ho ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 1~23
The mobile customer center is one of major customer service channels to gain company's competitive advantage, to establish new correlations between customers and service value, and to respond quickly to customer needs. This study attempted to investigate the effect of mobile customer center's quality on customer satisfaction, trust, and loyalty. For this purpose, we divided quality factors of mobile customer center into mobile service quality and content quality, and then empirically analyzed their impact on customer satisfaction, customer trust, and loyalty. The research result showed mobile service quality and content quality having significant association with customer satisfaction and trust. Moreover, customer satisfaction and trust were closely related to customer loyalty. However, there was no significant difference in the factors affecting customer satisfaction and trust according to the levels of personal innovativeness. It is hoped that this study provides academic foundations for further research on mobile customer center and serves as a useful guideline for operating customer service channels successfully.
Use Intention of Mobile Mail：A Comparative Study Between Korea and Japan
Lee, Myung-Moo ; Kim, Yun-Ho ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 25~43
The speed and magnitude of mobile phone adoption is a recent worldwide phenomenon akin to those of the television in the middle of the 20th century and the Internet in the late 20th century. During the 2000s, mobile phone adoption was exploded and subscriptions reached 3 billion around the globe. Korea and Japan have been ahead of the rest of the world in introducing new handset and service capabilities. They were the first markets to launch 3G services and are currently the only markets to have achieved mainstream adoption of 3G with over one-third of customers in both markets subscribing to 3G services. The purpose of this article is to explore the cultural similarities and differences associated with mobile mail by presenting findings from a cross-cultural comparison of perceptions and uses of the technology. The results of the study are as follows：Of the characteristics that make up the mobile text-messaging service in Korea, a person's perceived ease of use and perceived enjoyment was found to have a positive effect on use attitude. Among the characteristics that make up a person's perceived ease of use, perceived enjoyment was found to have a positive effect on use intention. And use attitude was found to have positive effects on use intention. But, of the characteristics that make up the mobile text-messaging service in Japan, a person's perceived usefulness, perceived ease of use and perceived enjoyment were found to have a positive effect on use attitude. Among the characteristics that make up a person's perceived usefulness, perceived ease of use and perceived enjoyment were found to have a positive effect on use intention. And use attitude was found to have positive effects on use intention. This study contributes to telecommunications research by delineating the various stimuli to consider for successful technology acceptance in a global setting, which can account for differential impacts across regions. The findings of this study can assist telecommunications operators in formulating an effective region-specific strategy when launching a wireless data service in a particular environment.
A Study of the Factors Affecting Communication Actions Using Instant Messenger in Organizations
Lee, Ook ; Ahn, Jong-Chang ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 45~63
To examine the role IM plays, We focus on the factors that promote or hinder communication within a Korean organization when instant messenger is used. These factors were examined through two research questions. To understand these issues, a survey consisting of 33 categories was given to government and corporate office workers in Seoul, Korea. The survey results showed that Instant Messenger is recognized as a powerful communication tool in official organizations, but is only used effectively within groups or generations that do not follow the hierarchical relationships characterized by Confucian values. The results of this study fill a gap in our understanding of the important role of IM use in organizational effectiveness and may prove useful when developing tools and strategies to help promote communication within organizations using information technology media.
A Study on the Factors of Mobile Applications Adoption
Han, Pil-Koo ; Park, Jae-Seok ; Jun, Byoung-Ho ; Kang, Byung-Goo ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 65~82
Mobile applications market has emerged as new business model. The purpose of this study is to analyze the factors of mobile applications adoption. Based on prior studies of TAM and mobile technology/service, service quality, user experience, OS compatibility, self-efficacy, innovativeness, perceived usefulness, perceived ease of use, and cost were identified as affecting factors of mobile applications adoption. According to the results, service quality is significantly related to the perceived usefulness, and self-efficacy and innovativeness are significantly related to the perceived ease of use. User experience was also found to be related to both the perceived usefulness and the perceived ease of use. In case of OS compatibility, it was found to be significantly related to the perceived ease of use, but not to the perceived usefulness. Both the perceived usefulness and the perceived ease of use were found to be related to the adoption of mobile applications. However, cost was not found to be significant to the relationship between the perceived usefulness/the perceived ease of use and the adoption of mobile applications. This study contributes to provide the base of activation strategies and practical implications for mobile applications.
A Delay-guaranteed Overlay Network for P2P Streaming Service
Park, Seung-Chul ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 83~93
P2P streaming technology has advantages of scalability and availability comparing to the popular IP multicast. This paper proposes an approach to apply the P2P streaming technology to the delay-sensitive multimedia multicast applications. In order for the P2P streaming to be applied to the delay-sensitive applications, prior construction of delay-guaranteed overlay network is necessarily required. Moreover, the delay-guaranteed overlay network should be able to be kept even when the hand-overs occur owing to the departures of the intermediate P2P peers. This paper proposes a delay-guaranteed overlay network construction method by using the bandwidth and end-to-end delay based admission control and the backup peer based hand-over control mechanism.
Implementation of a Top-down Clustering Protocol for Wireless Sensor Networks
Yun, Phil-Jung ; Kim, Sang-Kyung ; Kim, Chang-Hwa ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 95~106
Many researches have been performed to increase energy-efficiency in wireless sensor networks. One of primary research topics is about clustering protocols, which are adopted to configure sensor networks in the form of hierarchical structures by grouping sensor nodes into a cluster. However, legacy clustering protocols do not propose detailed methods from the perspective of implementation to determine a cluster's boundary and configure a cluster, and to communicate among clusters. Moreover, many of them involve assumptions inappropriate to apply those to a sensor field. In this paper, we have designed and implemented a new T-Clustering (Top-down Clustering) protocol, which takes into considerations a node's density, a distance between cluster heads, and remained energy of a node all together. Our proposal is a sink-node oriented top-down clustering protocol, and can form uniform clusters throughout the network. Further, it provides re-clustering functions according to the state of a network. In order to verify our protocol's feasibility, we have implemented and experimented T-Clustering protocol on Crossbow's MICAz nodes which are executed on TinyOS 2.0.2.
Minimizing Frequency Drop Cost and Interference Cost in Reconfiguring Radio Networks
Han, Jung-Hee ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 107~121
In this paper, we present a frequency reassignment problem (FRP) that arises when we install new base stations or reconfigure radio networks to increase the capacity or to expand service area. For this problem, we develop an integer programming (IP) model, and develop cutting planes to enhance the mathematical representation of the model. Also, we devise an effective tabu search algorithm to obtain tight upper bounds within reasonable time bounds. Computational results exhibit that the developed cutting planes are effective for reducing the computing time as well as for increasing lower bounds. Also, the proposed tabu search algorithm finds a feasible solution of good quality within reasonable time bound.
Development of a Backward Chaining Inference Methodology Considering Unknown Facts Based on Backtrack Technique
Song, Yong-Uk ; Shin, Hyun-Sik ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 123~144
As knowledge becomes a critical success factor of companies nowadays, lots of rule-based systems have been and are being developed to support their activities. Large number of rule-based systems serve as Web sites to advise, or recommend their customers. They usually use a backward chaining inference algorithm based on backtrack to implement those interactive Web-enabled rule-based systems. However, when the users like customers are using these systems interactively, it happens frequently where the users do not know some of the answers for the questions from the rule-based systems. We are going to design a backward chaining inference methodology considering unknown facts based on backtrack technique. Firstly, we review exact and inexact reasoning. After that, we develop a backward chaining inference algorithm for exact reasoning based on backtrack, and then, extend the algorithm so that it can consider unknown facts and reduce its search space. The algorithm speeded-up inference and decreased interaction time with users by eliminating unnecessary questions and answers. We expect that the Web-enabled rule-based systems implemented by our methodology would improve users' satisfaction and make companies' competitiveness.
A Study on An Real-time Identifying User Location System based on AP in Wireless LANs
Choi, Jae-Hyun ; Park, Jae-Won ; Shin, Young-Woo ; Lee, Nam-Yong ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 145~161
Recently, identifying user locations is becoming important as the society evolves into an ubiquitous society with the innovation of information technology. Particularly, many researches on identifying user locations are headed in direction to identify locations of users in the indoors, because a GPS that is widely used to identify the locations of users in the outdoors is inapplicable in the indoors. However, those researches are mostly not useful to general indoor environment because they are performed in a specific environment with specialized or customized devices such as UWB, RFID. Therefore, in this paper we propose a effective method to identify user locations in general indoor environments with wireless local network access points. Our approach enables to identify user location efficiently by measuring signal power of access points around the user and using the FRIIS formula which is used to calculate the distance among the things.
Analysis of Trend in Dynamic Service Composition Technology for Context-Aware Computing Environments
Shin, Dong-Cheon ; Jang, Hyo-Sun ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 163~178
A service composition has received much interest to provide users with the ad-hoc, seamless, and context-sensitive services dynamically composed from various networked services in context-aware computing environments. In this paper, with the purpose of guiding trends in the researches for dynamic service composition technologies, we investigate and analyze the major related works. For this, we separate semantic based composition from syntax based composition and then establish the comparison criteria by dividing the service composition processes into 3 steps：definition, construction, and execution.
Automatic Identification of Business Services Using EA Ontology
Jeong, Chan-Ki ; Hwang, Sang-Kyu ;
Journal of the Korea society of IT services, volume 9, issue 3, 2010, Pages 179~191
Service identification and composition is one of the key characteristics for a successful Service-Oriented Computing, being receiving a lot of attention from researchers in recent years. In the Service-Oriented Analysis, the identification of business services has to be preceded before application services are identified. Most approaches addressing the derivation of business services are based on heuristic methods and human experts. The manual identification of business services is highly expensive and ambiguous task, and it may result in the service design with bad quality because of errors and misconception. Although a few of approaches of automatic service identification are proposed, most of them are in focus on technical architectures and application services. In this paper, we propose a model on the automatic identification of business services by horizontal and vertical service alignment using Enterprise Architecture as an ontology. We verify the effectiveness of the proposed model of business services identification through a case study based on Department of Defense Enterprise Architecture.