특수목적용 모바일 앱의 성공요인에 관한 실증연구: A 대학교 모바일 캠퍼스 앱을 중심으로

조우철 ( Woo Chul Cho ),임재익 ( Jay Ick Lim ),양성병 ( Sung Byung Yang ) 한국지식경영학회 2014 지식경영연구 Vol.15 No.3

Recently, with the increasing popularity of smartphones, mobile applications have been being used in various sectors. In these environments, some mobile applications are being made for special purposes. The mobile campus application is one exemplary type of such special-purpose mobile applications, which have unique characteristics that allow only designated users, belonging to a specific group, to access and use relevant knowledge. The aim of this study is to identify and investigate critical success factors of mobile campus applications based on the DeLone & McLean‘s information systems (IS) success model and to find unique characteristics of mobile campus applications, compared to general-purpose mobile applications. In order to empirically test our research model, 199 samples were collected from students who actually had experience of using the mobile campus application of A university at least once. The findings of the structural equation modeling using SmartPLS 2.0 confirmed the DeLone & McLean’s IS success model, with the exception for relationships between service quality and user satisfaction/intention to use. Moreover, the moderating role of sense of belonging to school on the relationships between quality-related factors (i.e., information, system, and service qualities) and success-related factors (i.e., user satisfaction and intention to use) was examined.

사용자 리뷰를 통한 소셜커머스와 오픈마켓의 이용경험 비교분석

채승훈(Seung Hoon Chae),임재익(Jay Ick Lim),강주영(Juyoung Kang) 한국지능정보시스템학회 2015 지능정보연구 Vol.21 No.4

Mobile commerce provides a convenient shopping experience in which users can buy products without the constraints of time and space. Mobile commerce has already set off a mega trend in Korea. The market size is estimated at approximately 15 trillion won (KRW) for 2015, thus far. In the Korean market, social commerce and open market are key components. Social commerce has an overwhelming open market in terms of the number of users in the Korean mobile commerce market. From the point of view of the industry, quick market entry, and content curation are considered to be the major success factors, reflecting the rapid growth of social commerce in the market. However, academics empirical research and analysis to prove the success rate of social commerce is still insufficient. Henceforward, it is to be expected that social commerce and the open market in the Korean mobile commerce will compete intensively. So it is important to conduct an empirical analysis to prove the differences in user experience between social commerce and open market. This paper is an exploratory study that shows a comparative analysis of social commerce and the open market regarding user experience, which is based on the mobile users reviews. Firstly, this study includes a collection of approximately 10,000 user reviews of social commerce and open market listed Google play. A collection of mobile user reviews were classified into topics, such as perceived usefulness and perceived ease of use through LDA topic modeling. Then, a sentimental analysis and co-occurrence analysis on the topics of perceived usefulness and perceived ease of use was conducted. The studys results demonstrated that social commerce users have a more positive experience in terms of service usefulness and convenience versus open market in the mobile commerce market. Social commerce has provided positive user experiences to mobile users in terms of service areas, like ‘delivery,’ ‘coupon,’ and ‘discount,’ while open market has been faced with user complaints in terms of technical problems and inconveniences like ‘login error,’ ‘view details,’ and ‘stoppage.’ This result has shown that social commerce has a good performance in terms of user service experience, since the aggressive marketing campaign conducted and there have been investments in building logistics infrastructure. However, the open market still has mobile optimization problems, since the open market in mobile commerce still has not resolved user complaints and inconveniences from technical problems. This study presents an exploratory research method used to analyze user experience by utilizing an empirical approach to user reviews. In contrast to previous studies, which conducted surveys to analyze user experience, this study was conducted by using empirical analysis that incorporates user reviews for reflecting users vivid and actual experiences. Specifically, by using an LDA topic model and TAM this study presents its methodology, which shows an analysis of user reviews that are effective due to the method of dividing user reviews into service areas and technical areas from a new perspective. The methodology of this study has not only proven the differences in user experience between social commerce and open market, but also has provided a deep understanding of user experience in Korean mobile commerce. In addition, the results of this study have important implications on social commerce and open market by proving that user insights can be utilized in establishing competitive and groundbreaking strategies in the market. The limitations and research direction for follow-up studies are as follows. In a follow-up study, it will be required to design a more elaborate technique of the text analysis. This study could not clearly refine the user reviews, even though the ones online have inherent typos and mistakes. This study has proven that the user reviews are an invaluable source to analyze user experience. The

How to Reinvent Network Services for All

김용재(Yong J. Kim),이석준(Seojun Lee),임재익(Jay Ick Lim) 한국경영과학회 2008 經營 科學 Vol.25 No.3

Besieged by needs for upgrading the current Internet, social pressures, and regulatory concerns, a network operator may be left with few options to improve his services. Yet he can still consider a transition prioritizing network services. In this paper, we describe a transition from a non-priority system to a prioritized one, using non-preemptive M/G/1 model. After reviewing the constraints and theoretical results from past research, we describe steps making the transition Pareto-improving, which boils down to a multi-goal search for a Pareto-improving state. We use a genetic algorithm that captures actual transition costs along with incentive-compatible and Pareto-improving constraints. Simulation results demonstrate that the initial post-transition solutions are typically Pareto-improving. For non Pareto-improving solutions, the heuristic quickly generates Pareto-improving and incentive-compatible solutions.

정보시스템 성공모형을 기반으로 한 모바일월렛 지속사용의도에 미치는 영향 요인 분석

전선호(Sun Ho Jeon),강주영(Ju Young Kang),임재익(Jay Ick Lim) 한국IT서비스학회 2014 한국IT서비스학회지 Vol.13 No.4

Mobile payment system using NFC attracted attention as the mobile payment market grows due to the fast diffusion of smart phones. However, non NFC mobile payment recently appeared because of the slow growth of infrastructure for NFC. With advent of Non NFC mobile payment applications, mobile payment industry is in developing trend. Non NFC mobile payment revitalizes the market by overcoming the limit of NFC with the smart applications using bar code and QR code payment, and providing various discounts, membership benefits and payment information. Therefore, this paper analyzed the intention of continuous use with the quality of mobile payment application based on the information system success model. Three categories of factors which are system quality, service quality, and information quality were used. We verified the significance of the factors affecting the intension of continuous use. mainly, quality of information was considered as an important factor of continuous Intention to Use. Also, unlike previous NFC, it was found that in Non - NFC, compatibility might not be as important factor. Moreover, we suggest a marketing strategy of companies for mobile payment industry which focus on information quality. and future research directions for non NFC payment market.

토픽모델링 기법을 활용한 산업별 직무만족요인 비교 조사 : 잡플래닛 리뷰를 중심으로

김동욱(Dong Wook Kim),강주영(Ju Young Kang),임재익(Jay Ick Lim) 한국IT서비스학회 2016 한국IT서비스학회지 Vol.15 No.3

As unemployment rates and concerns about turnover keep growing, the need for information is also increasing. In these situations, the job reviews which share information about the company catch people s attention because they are usually created by people who worked at the company. The development of SNS and mobile environments has led to an increase in the web services that provide job reviews. For example, Jobplanet is a job review service in Korea, and Glassdoor.com offers a similar service in the US. Despite this attention, however, research utilizing job reviews is insufficient. This paper asks whether there are differences in ratios of job satisfaction factors by industry, using LDA topic modeling and co-occurrence analysis to explore the differences. Through the results of LDA, we find that the ratios of job satisfaction factors are similar by industry. At the same time, the results of co-occurrence analysis show that the co-occurrence frequency of some job satisfaction factors appears high: pay and welfare, balance of work and life, company culture. We expect that the result of this research will be helpful in comparative analysis of job satisfaction factors by industry. Furthermore, in this paper we suggest how to use the job review data in organizational behavior research.

조달업무를 위한 전자상거래 모형 설계 및 구축

임재익,노승종,김민회,주영범 한국로지스틱스학회 1998 로지스틱스연구 Vol.6 No.2

현재 세계적으로 기업간의 전자상거래는 대부분 VAN이나 기업이 자체 구축한 전용망을 통한 EDI로 이루어지고 있다. VAN에 기반한 EDI는 업무프로세스의 단순화 및 비용절감에 상당한 효과를 거두고 있지만 이의 실현을 위해서는 EDI 전용망을 구축해야 하며 거래업체가 관련 소프트웨어 및 장비를 설치해야 하므로 소요비용을 부담할 수 있는 일정규모 이상의 기업만이 사용 가능하다. 또한 거래업무의 일괄처리로 인한 실시간 거래 요구 불만족과 같은 문제점을 가진다. 이러한 비용적, 운용적 측면의 이유 이외에도 기업간 거래가 국제화됨에 따라 VAN EDI를 벗어나서 인터넷을 기반으로 하는 개방형 EDI가 대두되고 있다. 인터넷은 기본적으로 개방성을 지향하고 있으며 이용요금이 저렴하기 때문에 새로운 거래상대자를 쉽게 유인할 수 있다. 따라서 인터넷의 보안문제와 같은 단점에도 불구하고 영세중소기업이나 단발적인 거래를 하는 업체들을 위해서는 인터넷을 통해 데이터를 교환하는 방법이 적절한 대안이 될 수 있다. 본 연구에서는 기존 VAN EDI 방식의 한계성을 논하고, 이를 극복하기 위한 대안으로 몇 가지 인터넷 기반 EDI방법론을 기술적 측면에서 정리하였으며, VAN과 인터넷을 통합하는 모형을 제시하였다. 또한 이를 바탕으로 한국통신 조달업무를 대상으로 한 인터넷 기반 EDI 시스템 프로토타입을 설계, 구현하였으며 향후 발전 방향을 모색하였다. This is to report the design and implementation of an electronic commerce platform for the Korea Telecom procurement process employing Web based EDI. The procurement process is analyzed adopting the business analysis technique and the data modeling. Core sub-processes are identified including announcement, bidding, and contract. An Web-based EDI scheme is designed using the business and information modeling technique and the process decomposition technique. A prototype platform is implemented employing Access, Visual Basic, and FrontPage.

데이터 통신 네트워크 장기적인 계획수립을 위한 모델의 분석

임재익,김기탁 한국데이타베이스학회 1998 Journal of information technology applications & m Vol.4 No.2

최근에 이르러 정보 통신에 대한 수요가 폭발하고 있으나, 데이터 통신을 위한 네트워크 구축하는 데는 막대한 비용이 소요되며, 장기적인 투자의 관점에서 효율성을 달성하기가 쉽지 않다. 본 연구는 기존의 네트워크를 확장해나가거나 새로운 네트워크를 구축하고자 할 때, 미래의 수요 및 신기술의 변화 등을 고려하여 최적의 네트워크를 설계하는 문제를 다루고 있다. 본 연구는 데이터 통신 네트워크의 장기적인 확장계획 수립의 문제를 분석적으로 다룬 최초의 논문이라고 할 수 있는 Dutta & Lim[4]의 기존 연구를 근간으로 하되 라우팅방법을 바꾸어 라우팅에 따른 해의 민감도를 분석함으로써, 네트워크의 설계 및 확장계획 수립을 위한 효율적인 해를 찾아내는 알고리즘을 개발하고자 하였다.