Journal of the Korea society of IT services最新文献

{"title":"Implementation of Mobile Digital Signage System on the Moving Vehicle","authors":"Hee-Dong Kim, Chanbin Kim","doi":"10.9716/KITS.2015.14.4.257","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.257","url":null,"abstract":"Abstract Submitted：November 3, 2015 1 st Revision：December 8, 2015 Accepted：December 12, 2015* 중소기업청 2012년 산학연공동기술개발사업 “차량 설치형 도로교통 정보안내 전광판시스템 개발”으로 연구되었음.** 한국외국어대학교 정보통신공학과 교수*** 한국외국어대학교 컴퓨터공학과 교수 We propose a vehicle-mounted, location-aware mobile digital sig nage system that can be used for public transpor-tation through mobile communication. This paper proposes the in stallations of the LED display panels at the backside of the bus., which display traffic information to cars behind t he bus. Information to be displayed would include, but is not limited to, road information, public commercials and private commercials. We propose the system architecture and further implement the prototype of mobile digital signage system for demonstration. The system is based on the Client-Server system. Each bus has a client terminal which dete cts the current location by a GPS receiver and sends its location information to the server using mobile communicati on function. The terminal device receives advertisements and traffic information from the server and displays it to the large LCD or LED panel installed at the inside and outside of the bus. We use the Android smartphone as a client system, which inherently equipped with GPS and mobile communication function. GPS detects the location of bus and rep orts its geo-location data to the traffic information center server via a wireless communication network. On the serv er side, we developed a specially designed control server, where it communicates with the other traffic informatio n center and updates and manages the databases contents being displayed by each position. The server contains location dependent variable information and returns selected information back to the vehicle in real time. Spatial database is used to process location based data. Server system periodically receives the real time traffic information from the road information center database. And it process the information by bus location and bus line number. In this paper, we propose a mobile digital signage service and explain the system implementation of this service.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127708143","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Study on Classifications of Useful Customer Reviews by Applying Text Mining Approach","authors":"H. Lee","doi":"10.9716/KITS.2015.14.4.159","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.159","url":null,"abstract":"Abstract Submitted：July 20, 2015 1 st Revision：September 20, 2015 Accepted：September 29, 2015*본 연구는 2013년 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 연구이며(NRF-2013S1A5A2A01018177), 2014년도 가톨릭대학교의 교비연구비의 지원도 받았음. ** 가톨릭대학교 경영학부 Customer reviews are one of the important sources for purchase decision makings in online stores. Online stores have tried to provide useful reviews in product pages to custom ers. To assess the usefulness of customer reviews before other users have voted enough on the reviews, diverse as pects of reviews were utilized in prevous studies. Style and semantic information were utilized in many studies. This study aims to test diverse alogrithms and datasets for ide ntifying a proper classification method and threshold to classify useful reviews. In particular, most researches util ized ratio type helpfulness index as Amazon.com used. However, there is another type of usefulness index utilized in TripAdviser.com or Yelp.com, count type helpfulness index. There was no proper threshold to classify useful reviews yet fo r count type helpfulness index. This study used reivews and their usefulness votes on restaurnats from Yelp.com to devi se diverse datasets and applied text mining approaches to classify useful reviews. Random Forest, SVM, and GLMNET showed the greater values of accuracy than other approaches.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127515932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimization of Random Subspace Ensemble for Bankruptcy Prediction","authors":"Sung-Hwan Min","doi":"10.9716/KITS.2015.14.4.121","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.121","url":null,"abstract":"Ensemble classification is to utilize multiple classifiers instead of using a single classifier. Recently ensemble classifiers have attracted much attention in data mining community. Ensemble learning techniques has been proved to be very useful for improving the prediction accuracy. Bagging, boosting and random subspace are the most popular ensemble methods. In random subspace, each base classifier is trained on a randomly chosen feature subspace of the original feature space. The outputs of different base classifiers are aggregated together usually by a simple majority vote. In this study, we applied the random subspace method to the bankruptcy problem. Moreover, we proposed a method for optimizing the random subspace ensemble. The genetic algorithm was used to optimize classifier subset of random subspace ensemble for bankruptcy prediction. This paper applied the proposed genetic algorithm based random subspace ensemble model to the bankruptcy prediction problem using a real data set and compared it with other models. Experimental results showed the proposed model outperformed the other models.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132483748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Study on the Weights of Capability Evaluation Model for IT Consultant to Implement IT Consulting Service","authors":"S. Jin, W. Kim","doi":"10.9716/KITS.2015.14.4.061","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.061","url":null,"abstract":"This paper has explored the analyzing and defining the core competencies of IT consultants who carry out IT consulting projects which desperately are needed by companies to survive in business competitions. Many companies have used IT consultants for their IT projects to achieve their project objectives. The problem of this is the results of IT projects carried out by IT consultants from the recognized consulting firms are quite often criticized by many clients who pay high price for hiring IT consultants. The purpose of this paper is that to weight of capability evaluation model for IT consultants. To define the capability model, I conducted the surveys from the IT professionals by the interview and e-mails. The result of this, this paper defines what core skills IT consultants should have to perform well when they carry out the IT projects. There are 6 major skills and 17 sub skills IT consultants should have in succeeding IT projects. 6 major skills are job competence skill, communication skill, business attitude, vocational values, job performance skill, leadership skill and related 17 sub skill are defined. With the capability evaluation model, the managers who are in the charge of incubating and enhancing the capability of IT consultants in the large corporation and also small, medium companies will utilize their companies' strength to get the advantage on the business competition.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132806205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An Empirical Study on Factors Affecting Customer Intention to Use Mobile Payment System in Vietnam","authors":"Phuong Nguyen, S. Lee, W. Kang, Jeong Suk Kim, Gwangyong Gim","doi":"10.9716/KITS.2015.14.4.171","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.171","url":null,"abstract":"Nowadays, mobile commerce is having an increasingly profound impact on our daily lives, and offer interesting and advantageous new services. Mobile payment is an emerging and important application of mobile commerce in smart work, enabling users to use their mobile devices (especially mobile phones) for paying goods and services wherever they go. The appearance of m-payment is expected to provide us a convenient and bright future to enjoy. That is the common trend on over the world, but in Vietnam, although the number of smart phone users has been increasing rapidly, the adoption of m-payment system still didn't succeed completely. The research reviewed literature regarding mobile payment services, analyzed the impact of customer characteristics and system characteristics on m-payment adoption in Vietnam. To analyze the adoption behaviors of m-payment users, m-payment research model which consists of three customer-characteristics (m-payment trust, personal innovativeness, m-payment knowledge) and four m-payment system characteristics (mobility, reachability, convenience, compatibility) were studied. The results indicate that perceived usefulness, trust, and compatibility are the important predictors to the intention to use m-payment. This study will assist m-payment services suppliers in implementing appropriate business models and service strategies to successfully attract customer to use m-payment in Vietnam, allowing managers to exert appropriate investment, time, and effort for m-payment system development in designing smart working.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"231 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123264010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Causal Relationship between Information Security Countermeasures and Information System Misuse","authors":"Joontaik Lee, Sang-Hoon Kim","doi":"10.9716/KITS.2015.14.4.081","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.081","url":null,"abstract":"【Intentional information systems (IS) misuse is a serious problem in many organizations. This study aims at developing the theoretical framework of deterring IS misuse on the basis of Nagin's General Deterrence Theory (GDT) which is very famous in the area of socio-criminology. Applying GDT to the IS misuse situation could be reasoned that the perceived certainty and the perceived severity of sanctions associated with committing IS misuse have positive impact on deterring the deviant behaviors. Also, these two constructs (certainty of sanctions and severity of sanctions) could be inferred to be influenced by the four types of IS security countermeasures (security policies, security awareness program, monitoring practices and preventive security software) derived through critically reviewing IS security-relevant literature. The proposed research model and ten hypotheses were empirically analysed using structural equation modelling with the data collected by conducting a questionnaire survey of staff members in business organizations in Korea. As a result, it was found that five ones of ten hypotheses were supported. It is thought that this study makes theoretical contribution to expanding research area of IS security and also has strong implications for IS security management practices within organizations.】","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128970029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Open Market Strategy of the Business Innovation Platform for SME Informatization based on Cloud Computing","authors":"Hyun-Soo Han, H. Yang, Kiho Kim","doi":"10.9716/KITS.2015.14.4.015","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.015","url":null,"abstract":"Abstract Submitted：November 17, 2015 1 st Revision：December 18, 2015 Accepted：December 21, 2015* 이 논문은 2013년도 정부(미래창조과학부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임 (2013015884).** 한양대학교 경영대학 교수, 주저자 *** 이화여자대학교 경영대학 교수, 교신저자 **** 중소기업기술정보진흥원, 기술개발지원부 부장SMBA (Small and Medium Business Administration) and TIPA (Korea Technology and Information Promotion Agency for SMEs) have operated the Business Innovation Platform for SM E Informatization based on cloud computing technology with the cooperation of seven industry cooperatives since 2013. This project will evolve into the open market platform where service providers and users voluntarily particip ate and transact. This research conducts the literature review about the concept of open market and the empirical analy sis through survey for the software providers and the future users regarding the future operation methods. The policy about how the open market strategy for the business innovation platform needs to be designed and implement ed are organized as the three differentiated govern-ment support strategies. The first is to provide free IT servic es including specialized core operation support S/W which is developed only for the small or home office group of firms w hich lack minimal informatization capability and budget. The second is to augment IT platform service through incorporat ing ERP supplier initiated commercial S/W sales window for those firms having medium level informatization capability. This includes to provide IT support for customization and system integration with existing government subsidized S/W. The third is to provide upgrading services of existing S/W functions to facilitate better system utilization. The results provide useful insight for government role to enhance SME competitiveness using IT.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131609796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Antecedents of Continuance Intention in the Context of Mobile Music Service","authors":"Hyeon Jo, Ho-Geun Ki, Bum Woo Kim, Chiwon Choi, Jaw Kwang Lee","doi":"10.9716/KITS.2015.14.4.199","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.199","url":null,"abstract":"Recently, many internet users are using mobile music service. In this paper, we aim to examine the effects of system quality factors and relation quality factors on continuance intention in the context of mobile music service. In order to analyze the antecedents of continuance intention, we introduced independent variables such as ease of use, stability, trust, involvement and unity. We also consider customer value and customer satisfaction as mediators. For empirical analysis, we surveyed 240 users of mobile music service. We conduct PLS (Partial Least Square) analysis for SEM (Structural Equation Modeling). As a result, 8 of proposed 12 hypotheses were accepted. Especially, system quality, trust and unity show positive influence on customer satisfaction significantly. Involvement and unity are positively related to customer value. Customer value and customer satisfaction show positive influence on continuance intention significantly. The results of this research can be useful guidelines for mobile music service users and providers.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121698243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Effect of Technostress on Counterproductive Work Behavior","authors":"Jaekang Lee, Taekyung Park","doi":"10.9716/KITS.2015.14.4.001","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.001","url":null,"abstract":"Abstract Submitted：January 29, 2015 1 st Revision：December 10, 2015 Accepted：December 18, 2015* 영남대학교 대학원 박사과정** 영남대학교 경영대학 조교수, 교신저자Due to advances in information and communication technologies ( ICTs) and the advent of the Smartphone, people have access to the internet and can work at any time and any wh ere. These are however likely to cause negative effects such as the personal information leakage and invasion o f privacy. Caused by negative aspects of ICTs, the stress is so-called technostress. Recently, it is reported that managers tend to task order to their subordinates using an SNS or mobile messenger on a real-time basis after office ho urs or even on holiday, leading to a sharp increase in technostress. While previous studies of stress indicate that it is associated with the counter-productive work behavior (CWB), no empirical evidence has shown about the relationship b etween technostress and CWB. This study aims to explore the effect of technostress on CWB. In addition, it seek s to clarify the moderating effect of leader-member exchange(LMX) in this relationship. Drawing on literature regar ding technostress and CWB, hypotheses are developed and tested with the sample of 101 using regression analyses. Re sults show that technostress has a significantly positive effect on CWB, but LMX has an insignificant moderating effect i n the relationship between technostress and CWB. Implications and limitations with suggestions for future studies are presented.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133765605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Demand Forecasting for B2B Electronic Products: The Case of Personal Computer Market*","authors":"Jeongwoo Moon, N. Chang, Wooje Cho","doi":"10.9716/KITS.2015.14.4.185","DOIUrl":"https://doi.org/10.9716/KITS.2015.14.4.185","url":null,"abstract":"Abstract Submitted：October 19, 2015 1 st Revision：November 28, 2015 Accepted：December 2, 2015* 이 논문은 2014년도 서울시립대학교 연구년 교수 연구비에 의하여 연구되었음.** 서울시립대학교 경영대학 박사과정, 제1저자*** 서울시립대학교 경영대학 교수, 교신저자**** 서울시립대학교 경영대학 교수As the uncertainty of demand in B2B electronics market has incr eased, firms need a strong method to estimate the market demand. An accurate prediction on the market demand is crucial for a firm not to overproduce or under-produce its goods, which would influence the performance of the firm. However, it is complicated to estimate the demand in a B2B market, particularly for the private sector, be cause firms are very diverse in terms of size, industry, and types of business. This study proposes both qualitative and quantitative demand forecasting approaches for B2B PC products. Four different measures for predicting PC products in B2B market with consideration of the different PC uses-personal work, common work, promotion, and welfare-are developed as the qualitative model’s input variables. These measures are verified by survey data collected from exper ts in 139 firms, and can be applied when individual firms estimate the demand of PC goods in a B2B market. As the q uantitative approach, the multiple regression model is proposed and it includes variables of region, type of industry, and size of the firm. The regression model can be applied when the aggregated demand for overall domestic PC mark et needs to be estimated.","PeriodicalId":272384,"journal":{"name":"Journal of the Korea society of IT services","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116819776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}