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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Digital Convergence
Journal Basic Information
Journal DOI :
The Society of Digital Policy and Management
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Volume & Issues
Volume 12, Issue 12 - Dec 2014
Volume 12, Issue 11 - Nov 2014
Volume 12, Issue 10 - Oct 2014
Volume 12, Issue 9 - Sep 2014
Volume 12, Issue 8 - Aug 2014
Volume 12, Issue 7 - Jul 2014
Volume 12, Issue 6 - Jun 2014
Volume 12, Issue 5 - May 2014
Volume 12, Issue 4 - Apr 2014
Volume 12, Issue 3 - Mar 2014
Volume 12, Issue 2 - Feb 2014
Volume 12, Issue 1 - Jan 2014
Selecting the target year
Characterizing Business Strategy in a New Ecosystem of Big Data
Yoo, Soonduck ; Choi, Kwangdon ; Shin, Sungyoung ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 1~9
DOI : 10.14400/JDC.2014.12.4.1
This research describes strategies to promote the growth of the Big Data industry and the companies within the ecosystem. In doing so, we identify the roles and responsibilities of various objects of this ecosystem and Big Data concepts. We describe the five components of the Big Data ecosystem: governance, data holders, service users, service providers and infrastructure providers. Related to the Big Data industry, the paper discusses 13 business strategies between the five components in the ecosystem. These strategies directly respond to areas of research by the Big Data industry leading experts on its early development. These strategies focus on how companies can gain competitive advantages in a growing new business environment of Big Data. The strategy topics are as follows: 1) the government`s long term policy, 2) building Big Data support centers, 3) policy support and improving the legal system, 4) improving the Privacy Act, 5) increasing the understanding of Big Data, 6) Big Data support excavation projects, 7) professional manpower education, 8) infrastructure system support, 9) data distribution and leverage support, 10) data quality management, 11) business support services development, 12) technology research and excavation, 13) strengthening the foundation of Big Data technology. Of the proposed strategies, establishing supportive government policies is essential to the successful growth of thee Big Data industry. This study fosters a better understanding of the Big Data ecosystem and its potential to increases the competitive advantage of companies.
Analysis of Factor`s Priority for Activating the Industry of Global Content Distribution
Park, Chang-Mook ; Jang, Hyung-Jun ; Koh, Chan ; Kim, Kwang-Ho ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 11~20
DOI : 10.14400/JDC.2014.12.4.11
Recently K-POP`s popularity and the success story of `Psy` suggests that Korean Culture can get the possibility of entry into the global major market. Increasing the purchasing power of global contents distribution also shows that the delivery of cultural content can be a big business model to create economic benefits. However, for sustainable diffusion of Korean culture, we need efforts to expand the business scope to the global market like the establishment of global distribution platform. In this study, we investigated key factors for activating the global content distribution and then analyzed priority of importance of the factors to be utilized the strategic alternatives using AHP method. To ensure the reliability of the study, experts (30patients) who worked more than 10 years of relevant work were included as population of the questionnaire. The results of analysis, the relative importance of content aspects were higher than technical aspects and policy aspects. In the analysis of the importance of the second layer factors, the business models of policy aspects were analyzed as a factor of top priority, then high-quality content production was selected as an important factor of the next higher ranks.
A Study on Smartphone Use by Korean Adult ELT Learners
Kim, Youngwoo ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 21~32
DOI : 10.14400/JDC.2014.12.4.21
Recently, the number of Koreans who use smartphones has increased drastically; many use smartphones to learn English. In this study, one hundred Korean adult ELT (English language teaching) learners were surveyed to investigate their use of smartphones and factors influencing such use. For comparison, sixty-two students of a Korean cyber university were surveyed; these students were able to study using their smartphones in a smart campus environment. The research results showed that both groups positively used smartphones frequently, and that many intended to continue using them. With regard to ELT, both groups intended to learn English using their smartphones. Furthermore, they preferred certain types of ELT content: thirty-minute or less learning sessions, receptive English skills that focused on listening and reading, and short units of framed language items such as pronunciation and vocabulary. However, few of the respondents in both groups installed ELT apps on their smartphones, and few of the ELT apps satisfied them. The cyber university students responded similarly about smartphone use, although their responses regarding smartphone use for ELT purposes were less positive. These results indicate that the goal of cyber universities in achieving optimum learning outcomes through smart learning and the smart campus has not yet been realized.
A Study on National Identity of Adolescents of Multi-cultural Family -An Application of Heater`s Theory-
Jeon, Byeong-Joo ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 33~41
DOI : 10.14400/JDC.2014.12.4.33
This study conducted a survey 212 adolescents in multi-cultural family to measure the level of their discrimination experience and acculturation stress by comparing with social integration analysis frame of D. Heater and examined how it affects them to national identity. Followings are the main results of this study. First, after measuring the discrimination experience level of those surveyed, their average was a bit higher than the normal level, showing 2.63(SD
A Study on plan for promoting innovation and utilization of information sharing
Kim, Youngmi ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 43~49
DOI : 10.14400/JDC.2014.12.4.43
Paradigm shift in government services means the evolution to the service with active participation based on information technology. Opening public information proceeds to an extent that private sector participation can be a basis and driving force, and extends to a stage that free and practical use is possible for private sector. Therefore, the government is preparing for legal and institutional foundation for various fields. The government needs to build open network from user-oriented point of view rather than provider-centric point of view, improve communication, and change the way of working due to the fact that flexible and rapid business process is required. It is time to prepare development plans for public the functions of platform-type government that public sector can participate in the role of government, create new value, and give rise to innovation in order to change the functionality of the government and meet the new needs of citizen. This study tries to analyze platform-type government and to study efficient role allocation for sharing resources including informant and system between the government and the private sector, focusing on innovation of public information sharing.
A Case Study on Classification System Design for Public Sector Information Typology
Kim, Dae-Gi ; Joo, Won-Kyun ; Kim, Eunjin ; Lee, Yong-Ho ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 51~68
DOI : 10.14400/JDC.2014.12.4.51
Today`s public sector information is considered an important national asset that has social and economic value. Hence, developed countries are competitively promoting various policies to actively promote access to public sector information and the use of such information for private purposes. The Korean government is also boosting the Government 3.0 policy as a new governmental management paradigm that supports the creative economy. Despite these governmental efforts, since open public sector information is only classified from the supplier`s perspective, it is difficult to have access to information for private application from the consumer`s perspective and expand private applications because of the problems in identifying the information source. In this study, the concept of data from the user`s perspective for the activation of private applications was defined by focusing on public sector information obtained by affiliated organizations of the Ministry of Science, ICT and Future Planning(MSIP). The new classification system was designed by analyzing the classification system of conventional open services of public sector information through investigation.
Rehabilitation and Serious Games
Kim, Hwangyong ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 69~73
DOI : 10.14400/JDC.2014.12.4.69
We pursue pleasure through game but also possibly get positive effects. The serious game is a game that achieves a certain goal by using the positive effects of games. This paper describes the serious game and rehabilitation. Also, it describes the types of medical serious games and actual development condition of serious games for rehabilitation, and suggest ways to inspire utilization of the serious games for rehabilitation.
MVNO Service User`s Motivation for Use and Dissatisfying Factors
Seong, Young-Hoon ; Lee, Yeong-Ju ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 75~84
DOI : 10.14400/JDC.2014.12.4.75
MVNO(Mobile Virtual Network Operator) promotes service competition in mobile telecommunication market and provides various service and opportunities for consumers. This study attempts to identify MVNO Service users` motivational and dissatisfying factors in relation to their willingness for continued use of the service 새 activate MVNO service. Use motivation factors are found as customer service, user interface, easiness, economical efficiency, and dissatisfying factors are handset quality, customer service, social influence. Economic efficiency factor had an affirmative influence on the sustained use motivation of the service users. Among dissatisfying factors, users had a negative influence when they recognize that their neighboring people does not use MVNO service. Policy authorities concerned must excavate a new plan to improve distribution structure of handset and reduce wholesaling cost of the MVNO service. It is necessary for MVNO service provider to develop a new business model so that users can recognize MVNO service not as inferior service but as rational and attractive service.
The Upbringing Plan of R&D Special Enterprise in Mobile Convergence
Kim, Ki-Bong ; Kim, Geun-Chae ; Choi, Sae-Bom ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 85~92
DOI : 10.14400/JDC.2014.12.4.85
In recent years, the government has pushed ahead with the convergence and innovation of science technology and information technology in order to realize the creative economy. So, a creative economy ecosystem has been set up to realize the creative economy for small businesses growth and small business happiness. According to proliferation of mobile area taking the lead in the recent IT transition, development of various convergence technologies related to mobile such as mobile Apps, SNS, and big data have been promoted. For realizing government`s creative economy, systematic raising plan to create newly value-added market and occupation being considered with developing technology for mobile convergence based on imagination and creativity of small businesses is proposed in this paper.
Analysing the Management Efficiency Strategy of State-Owned Enterprises
Ju, Sang Hyeon ; Lee, Soon Ho ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 93~102
DOI : 10.14400/JDC.2014.12.4.93
Recently, a lot of effort has been made to reinforce the profitability of the company through successful overseas expansion as one of the major ways to secure the competitiveness and to increase the business value these days. So, this study aims to try to analyse of the status of the overseas expansion case for the recent power industry through the case of the Korea Western Power Co., Ltd. as a measure of the management efficiency strategy of the public sector organization, and to present the policy implications about the management efficiency in the future by drawing upon the management efficiency strategy. This paper suggests alternatives as follows: First, the competitiveness should be reinforced through continuous change and innovation and the management efficiency should be developed. Second, the governance system for public-private sector should be constructed. Third, the efficient management of the global human resources is needed. Fourth, the mutual confidence-building through the active contribution to the community activities is required.
An Empirical Study on Bargaining Positions and Exchange Relationship in Supply Chain Network
Cho, Namhyung ; Kim, TaeUng ; Ryu, Sungmin ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 103~113
DOI : 10.14400/JDC.2014.12.4.103
Bargain position and trust are core issues in supply chain management, yet the effect of bargain position on trust remains to be undetermined. The purpose of this research is to present theoretical and methodological hurdles for the relationship among various bargain positions and trust, and develops a set of hypotheses about the asymmetric effect of bargain position on trust in supply chain network. An analytical tool to analyze nonlinear effects on a response surface is introduced. Based on the data collected through a survey of firms participating in Project Supply chain, a set of hypotheses is tested. The analysis results support the prediction that the bargain position perceived by the buyers have asymmetric effects on trust toward supplies, and provide more fine-grained accounts on the relationships among bargain power, bargain position and trust in a supply chain network.
An Empirical Study on the Effect of Venture Capital Investment on the Technological Performance of SMEs
Kim, Jae-Jin ; Yang, Dong-Woo ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 115~131
DOI : 10.14400/JDC.2014.12.4.115
This study analyzed the impact of the investment of venture capital firms(VCFs) on the technological advancement of SMEs, which could be represented as the numerical increasement of patents. The results of this study are as follows: the higher proportion of VCFs` shares or the higher intensity of R&D, the more positive impact has been shown in the technological advancement of SMEs. Also, the joint investment of VCFs or the leading investors` stock acquirement had a positive impact on the technological improvement of them. Meanwhile, the meaningful relationships of company-size and the technical manpower with technological development were not identified although they were marginally positive. Those could be interpreted that the VCFs` supervision and control, including their managerial and technical advice, over invested companies display effectiveness for SMEs. It could also be interpreted that investors concentrate their investment on the relatively stable companies or the companies which other investors already finished screening.
The Effects of Transaction Cost Factors on Cooperative Relationship Lasting Factors, Degree of Relationship Satisfaction, and Performance
Lee, Sang-Wan ; Kim, Jae-Yeol ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 133~143
DOI : 10.14400/JDC.2014.12.4.133
This paper investigate how transaction cost factors affect organizational performance both directly and indirectly, through cooperative relationship lasting factors and degree of relationship satisfaction. The results can be summarized as follows: First, asset uncertainty directly influenced financial and non-financial performance. Also asset specificity and opportunism did not influence financial and non financial performance directly. Second cooperative relationship lasting factors were connected with transaction cost factors direct variables on cooperative relationship lasting factors are asset specificity and uncertainty, but opportunism did not directly influence. Third, degree of relationship satisfaction were connected with transaction cost factors direct variables on degree of relationship satisfaction are asset specificity and opportunism, but uncertainty had not affected degree of relationship satisfaction. Fourth, cooperative relationship lasting factors and degree of relation satisfaction had affected financial performance and non financial performance. In summary, this study find that transaction cost factors had indirectly influenced organizational performance through mediated variables such as cooperative relationship lasting factors and degree of relationship satisfaction.
Analyis of the Structure and Impact of SCM Advanced Planning System : Lessons from POSCO Case
No, Gyeong Ho ; Park, Seong Taek ; Kim, Tae Ung ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 145~155
DOI : 10.14400/JDC.2014.12.4.145
POSCO has been chosen as the most competitive steelmaker in the world, for the 4th year in a row. It`s potentials and key success points lay at technology innovation as well as effective partnerships with suppliers and customers. Partnership with suppliers is based upon the effective supply chain management. While ERP system supports the standard business work flows, the biggest impact on business performance is created by exceptions and variability. A SCM Advanced Planning System reduces the amount of exceptional situations, helping to keep business in a standard mode of operation. A case summary on SCM Advanced Planning System of POSCO as well as its impact on firm performances is presented. As a supplement to this case study, we also investigate the employees` perceived level of SCM-related factors, including information sharing, collaboration, incentive system for suppliers and their impacts on SCM performances. As a conclusion, the practical implications of these findings are discussed.
The Effects That the Physical Environment in Shops has on the Customers` Emotion and Royalty
Kim, Jun-Whai ; Kim, Dong-Il ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 157~170
DOI : 10.14400/JDC.2014.12.4.157
Professional coffee shops are trying to increase customers` satisfaction and to invite more customers by providing the differentiated services. The existing researches show that the effects which the physical environment in shops has on customers` satisfaction and word of mouth intention are appealing to people`s attention. In comprehensively examining the studies related to the physical environment, they can be summarized into two main perspectives, that is, the direct effect that the physical environment has on customers` satisfaction, quality perception, and other customers` responses (purchase desire, revisit intention, etc.) and the indirect effect that the physical environment has on customers` responses by means of customers` emotion or value perception. This research established 4 hypotheses by sampling 321 customers of those who have visited professional coffee shops, and empirically analyzed them. The empirical analysis carried out the structure analysis of covariance by using SPSS 17.0 statistics package and AMOS 17.0. As a result of the hypothesis qualification, the other hypotheses excluding one little hypothesis were adopted. The one refused hypothesis is that the only symbolism of the environmental elements in shops doesn`t influence the customers` emotion positively (+). This is considered as a very unexpected result, and yet many customers who visit coffee shops express the symbols of professional coffee shops using the expressions such as `bean coffee shop` or `star coffee shop`, but these expressions seem not to influence customers` mind positively in practice.
Development Policy of Korea and China Public Service Advertising: Focusing on Comparison of KOBACO and CCTV Operating System
Kim, Na-Mi ; Yu, Seung-Yeob ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 171~182
DOI : 10.14400/JDC.2014.12.4.171
As several kinds of social public affairs come into the fore, public service advertising gets more important. In addition, the theme of the public service advertising differs depending on a country`s political, economic, social and cultural characteristics, and there are unique public service advertising operating systems. This study assumed that the operating systems of the public service advertising might differ in Korea and China because of political, social, and cultural differences. Thus, the public service advertising operating system carried out by KOBACO and CCTV, the subjects of the public service advertising operation of Korea and China were classified into three categories (public service advertising operation status, public service advertising theme and public service advertising management and supervision) for a comparison. Through literature review and expert in-depth interview, data were collected and analyzed. Based on the data, 5 public service advertising development policies were proposed. The results of this study will contribute to the public service advertising production strategy and institutional development of Korea and China in the future.
Effect of User Possession Attachment and Characteristics of Mobile Media on Acceptance of Mobile AD
Shin, Il-Gi ; Choi, Yun-Seul ; Shin, Hyun-Sin ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 183~192
DOI : 10.14400/JDC.2014.12.4.183
This study aims to empirically investigate how personalized and socialized mobile media impacts on users` acceptance of mobile advertising, given the consideration of users` mobile possession attachment. For this, the current study used focus group interview and surveyed mobile users. Interestingly, the findings reveal that personalized and socialized mobile characteristicssignificantly affect users` acceptance of mobile ads. That is to say, users` personalized mobile characteristics play an important role in either awareness of mobile ads or exposure to mobile ads.
Determinants of Service Quality on Customer Loyalty of Financial Agency -Focused on Suhyup Bank-
Lee, Sang-Jun ; Lee, Sang-Yup ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 193~200
DOI : 10.14400/JDC.2014.12.4.193
The purpose of this research is to explore ways to raise the quality of the financial services of Suhyup Bank, to secure its customers` loyalty, and to help it achieve sustainable growth. The results of this research showed that the ways to improve the service quality of Suhyup Bank are as follows: establish a relationship between its customers` satisfaction with the usefulness, creativity, reliability, and safety of its services and its customer management based on its customers` decision-making factors; establish service improvement schemes that consider new customer needs and desires; and improve its service quality and raise its internal quality factors, which are the keys to its expansion to customized services.
The Study of motives to select and revitalise a franchise by comparing management practices of nail shops
Lee, Mi-Sun ; An, Jong-Sook ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 201~211
DOI : 10.14400/JDC.2014.12.4.201
This study is to identify whether a difference exists between factors that influence the time when independently owned nail shops and franchises commence business. Futhermore, we set out to investigate the criteria for nail shop owners use when selecting franchise nail shops with a relatively high level of customer satisfaction and performance, to discuss the necessity of a franchise agreement. An actual analysis has revealed that there is a difference in factors that influence management at the time of and after the inception of independently owned shops and franchise nail shops. Business performance of franchise shops, as a result of evaluating customer satisfaction or monthly sales, turns out to be higher than independently owned shops. The criteria for selecting franchise stores includes intensity of competitiveness in the same business district, accessibility, ability to keep up with current trends, directors` skills, color scheme, excellence of company logo, interesting interior, reasonable prices compared to the level of cosmetic procedure and efforts to motivate employees. Overall, the deciding factor enabling shops to operate continuously is constant supervision from the headquarters of the franchise company.
A Study on the Interferences Between Work and Nonwork in the Smart Work Context
Oh, Sangjo ; Kim, Yong-Young ; Lee, Heejin ; Lee, Jong Man ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 213~226
DOI : 10.14400/JDC.2014.12.4.213
Previous research on work and life balance mainly focused on workers` passive acceptance of interferences rather than active management of them. However, workers can also actively manage boundaries to enhance work and life balance. To find ways to enhance work and life balance, especially in the context of Smart Work, factors having effects on the work/nonwork interferences and their relationships should be firstly investigated. The results show that in a work domain, both boundary strength at work and job autonomy negatively influence on the nonwork to work interferences; in a nonwork domain, both boundary strength at nonwork and autonomy have negative effects on the work to nonwork interferences.
A Study of Effect of Trust and Relational Norms on Interfirm Cooperation, Conflict and Performances in Project Supply Chain
Cheong, Heung Gyo ; Cho, Namhyung ; Kim, Tae Ung ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 227~235
DOI : 10.14400/JDC.2014.12.4.227
Supply chain management for complex project requires continuous integration activities with the suppliers and subcontractors. This study proposes the firm performances, trust, relational norms, interfirm conflict and cooperation as major research variables, and collected the survey responses from the suppliers and subcontractors having experiences with complex projects. The statistical results indicate that the cooperation and conflict influence the firm performances, and that the inter-firm trust have some impact on the level of cooperation and conflict. It was also found that the inter-firm cooperation is influenced by relational norm. But on the contrary to our expectation, the relational norm has no significant impact on the inter-firm conflict. These findings may offer the significant implications leading to successful implementation of collaborative supply chain management in the context of project engineering area.
Development of Guide and Facility Management App by using Augmented Reality and QR Code
Cho, Kwangmoon ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 245~249
DOI : 10.14400/JDC.2014.12.4.245
An app based on the augmented reality and QR codes is developed in this paper. This app is for guidance to the harbor and management the facilities in ships. Using the smart device app people could receive guidance the course to visit Mokpo harbor and information for the port and ship`s facilities. Through the utilization of smart devices, the app is easy to find the desired destination to and provide the convenience of tourists. In addition, by using the QR code people could see an explanation of the ship`s facilities and write the inspection reports for the facilities.
Research on a Method for Efficient u-Healthcare Data Transmission in M2M Environment
Cho, Gyoun-Yon ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 251~257
DOI : 10.14400/JDC.2014.12.4.251
In u-Healthcare environment, large amounts of important vital information is processed through M2M(Machine to Machine). M2M is configured by wireless networks and has several problems for limited bandwidth and low reliability. Therefore, in this paper is proposed a method called uHLZW(u-Healthcare LZW) to improve channel efficiency to solve such problem. uHLZW algorithm has high compression ratio for vital data. The results showed that the average compression ratio of uHLZW got from 1.6 times to 4.0 times better than existing methods(Huffman and LZW compression).
Authentication Protocol based on Credential for Implantable Medical Device
Jeong, Yoon-Su ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 259~264
DOI : 10.14400/JDC.2014.12.4.259
Body insertion due to the recent development of sensor technology, the device is attached patients to receive medical services from anywhere, anytime environment is changing. Body insertion devices for the hospital, the patient`s vital information attached personnel (doctors, nurses, pharmacists, etc.) to pass, however, when a problem occurs, a patient`s information to a third party that can be exploited easily exposed. In this paper, we proposed signature authentication protocols mandate based on the patient`s power of attorney from the center of the u-Healthcare services, hospital officials FormHelper third party disguised as a patient, the hospital patient information easily obtained from the officials to prevent. The proposed protocol, the patient`s sensitive information to a third party, do not expose the patient`s sensitive information to the random number generated by the u-Healthcare service centers and patients hash signature key to encrypt sensitive information of patients. From third parties to maintain synchronization between the patients and the hospital personnel in order to prevent patient information from being exploited illegally by the patient`s vital information leakage can be prevented.
Providing a Direction to Interactive Design Education According to the Changes in IT Environment -Focusing on College Education-
Hong, Eun Jung ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 265~276
DOI : 10.14400/JDC.2014.12.4.265
This study observes innovation demand in design education according to IT environment in change, and explores reasonable directivity of design education according to fluctuations in media and technologies by presenting academic possibility of interactive design field and its education paradigms for universities. In order to achieve highly added values through interactive design complying with social demand, accompanying researches and academic frames are to be prepared, in particular with independent academic domain frame in universities, this study presents an educational directivity by recognizing important establishments of related curriculum that must be proceeded. This study has made a contribution in addressing the necessity of establishment of individual academic domain for interactive design and also setting up the domain of interactive design. It has been concluded that technological understanding beyond conventional design education, management of complex issues in consideration, and methodology of differentiated education in corresponding to the situation needed as well as typical educations of conventional technologies should be provided for satisfying innovation demand in the domain of interactive design.
Characteristics of Gas Furnace Process by Means of Partition of Input Spaces in Trapezoid-type Function
Lee, Dong-Yoon ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 277~283
DOI : 10.14400/JDC.2014.12.4.277
Fuzzy modeling is generally using the given data and the fuzzy rules are established by the input variables and the space division by selecting the input variable and dividing the input space for each input variables. The premise part of the fuzzy rule is presented by selection of the input variables, the number of space division and membership functions and in this paper the consequent part of the fuzzy rule is identified by polynomial functions in the form of linear inference and modified quadratic. Parameter identification in the premise part devides input space Min-Max method using the minimum and maximum values of input data set and C-Means clustering algorithm forming input data into the hard clusters. The identification of the consequence parameters, namely polynomial coefficients, of each rule are carried out by the standard least square method. In this paper, membership function of the premise part is dividing input space by using trapezoid-type membership function and by using gas furnace process which is widely used in nonlinear process we evaluate the performance.
A secure authentication system on wired wireless integrated network using OpenFlow
Moon, Jeong-Kyung ; Cho, Han Jin ; Kim, Jin-Mook ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 285~291
DOI : 10.14400/JDC.2014.12.4.285
Recent, development of wireless communication devices are rapidly and these device being deployed to the user very fast. By this results, a wired network device and the new device such as wireless devices incorporate. Then a demand of new mesh network is rapidly growing. In this wired/wireless integrated network environment, the network is configured automatically, and a user or wireless communication devices must be provided for authentication services. But, these services do not in the real world. Therefore, in this paper, we propose that wired/wireless integrated network environment to automatically configure the network using OpenFlow and the authentication system using Kerberos method. Our proposed system to be able to provide authentication services, confidentiality, integrity services for user or wired/wireless communication devices. And it can be prvented as well to man-in-the-middle attacks.
A Study on the Factor Which Causes the Imbalance Between DAU and Game Purchase in the Mobile Game Market - With an emphasis on Google Play Free Games -
Lim, Jun ; Choi, Sung Wook ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 293~303
DOI : 10.14400/JDC.2014.12.4.293
The mobile game market is fast growing after the Kakao game launched. Especially, the market is placed at the second highest by occupying 33.1% of the market. However, the rate of the total sales amount is only 6%, showing quite an imbalance between the market occupancy and the sales amount. This means that the profit-making models are not stabilized yet in the mobile game market. The absence of profit-making models can be ascertained by the relationship of DAU and sales ranking. There are several games which are ranked at DAU Top10 among Google free games, but not ranked at top 10 among sales amounts. On the other hand, there are several games which are low in DAU ranking but high in sales amount ranking. This result shows that there is no direct interrelation between the product attractiveness which users feel and the profit-making models in the market. This study compared the Google play free games which are ranked at top 10 in terms of DAU ranking and sales amount ranking to find out the factor which causes the imbalance between the DAU ranking and sales amount ranking. Based on this outcome, this study presents the reference point for the design of profit-making models on behalf of the manufacturers who wish to launch into the mobile game market in the future.
A Case Study on Foreign Smart City
Lee, Seong-Hoon ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 305~310
DOI : 10.14400/JDC.2014.12.4.305
We called a current society the convergence generation. In information society, digital convergence means a service or new product which appeared through fusion of unit technologies in information and communication regions. The effects of convergence technologies and social phenomenons are visualized in overall regions of society such as economy, society, culture, etc. In 2011, The Government introduced "IT Convergence Technology Prediction Survey 2025". This report includes 10 ICT industries. In this paper, we described a smart city which was leading case in digital convergence and related with our life.
Using High Brightness LED Light Source Controller for Machine Vision
Park, Yang-Jae ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 311~318
DOI : 10.14400/JDC.2014.12.4.311
This paper is to introduce a lighting source controller using high brightness LED to create a clear and reliable condition for an accurate measurement and testing, which is a core technology in clinical image system and mechanical automation system. This controller is designed to supply a stable power in a constant-current system by installing a high brightness LED driver, and to improve the reproducibility of brightness by using 32-bit ARM processor core, dividing brightness quantity into 256 levels, making the remote control and the external interface possible, and preventing and digitizing the brightness inaccuracy caused by errors of resistance values. This controller enables the lighting range to be wide and possible in a low lighting level compared to analog, adds the RS-485 communication function, and makes it for the users to control the on-off function and the dimming level by receiving date from an external device.
Hand Biometric Information Recognition System of Mobile Phone Image for Mobile Security
Hong, Kyungho ; Jung, Eunhwa ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 319~326
DOI : 10.14400/JDC.2014.12.4.319
According to the increasing mobile security users who have experienced authentication failure by forgetting passwords, user names, or a response to a knowledge-based question have preference for biological information such as hand geometry, fingerprints, voice in personal identification and authentication. Therefore biometric verification of personal identification and authentication for mobile security provides assurance to both the customer and the seller in the internet. Our study focuses on human hand biometric information recognition system for personal identification and personal Authentication, including its shape, palm features and the lengths and widths of the fingers taken from mobile phone photographs such as iPhone4 and galaxy s2. Our hand biometric information recognition system consists of six steps processing: image acquisition, preprocessing, removing noises, extracting standard hand feature extraction, individual feature pattern extraction, hand biometric information recognition for personal identification and authentication from input images. The validity of the proposed system from mobile phone image is demonstrated through 93.5% of the sucessful recognition rate for 250 experimental data of hand shape images and palm information images from 50 subjects.
Smartphone Content Security Scheme for Protect Malware Attacks
Jeong, Yoon-Su ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 327~333
DOI : 10.14400/JDC.2014.12.4.327
Recently, smartphone are increasing in Internet-enabled applications to install and delete benefits as well as internet through various interfaces such as 3G network, Wi-Fi, Wibro without the constraints of time and place. However, the prevalence of smartphones and the activity was generated from an existing PC smartphone security threats are causing a ripple in a society. In this paper, we serve live content services on the first and last content by creating an electronic signature is the signature of either the loss of any Content provided by both authentication and non-repudiation content protection scheme is proposed. The proposed method of secure smartphone users to download and install the content or an application for downloading content over the content for secure authentication.
Chronic Disease Management using Smart Mobile Device
Kim, Gui-Jung ; Han, Jung-Soo ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 335~342
DOI : 10.14400/JDC.2014.12.4.335
According to the recent trends in the growing elderly population, the chronically ill have increased. Thus the importance of the health care issues for them has emerged. In this paper, we want to implement a chronic disease management system using smart mobile devices. Proposed chronic disease management system is consisted of the biometric sensor, smart mobile devices, the patient management server, patient management DB, and patient symptoms analysis agent. The biometric sensor detects a biological information. Smart mobile devices receive the patient information from the sensor and transmit the information to the patient management server. The patient management server, patient management DB, and patient symptoms agent analysis agent analyze to process data delivered through a wireless communication network. Bio-signals includes modules of ECG, blood pressure, blood sugar and PPG. We are able to determine the current health status by monitoring measured biometric data through chronically ill health management system. We will focus on the individual service to be appropriate for a patient group in a mobile environment.
Unequal Dual-band Wilkinson Power Divider
Kim, Byung-Chul ; Lee, Soo-Jung ; Kim, Young ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 343~348
DOI : 10.14400/JDC.2014.12.4.343
This paper suggested a theoretical approach and an implementation for the design of an unequal Wilkinson power divider with a high dividing ratio operating at two-frequencies. The T-section transmission lines and the two-section of Monzon`s theory are proposed to operate a dual-band application. To achieve the high dividing ratio divider, the high impedance line using a T-shaped structure and low impedance lines with periodic shunt open stubs are implemented. For the validation of this divider, a dual-band power divider with a high dividing ratio of 5 is simulated and measured at 1 GHz and 2 GHz. The measured performances of the divider are in good agreements with simulation results.
Effects of Aerobic Exercise on Middle-aged Male Smokers` Blood Vessel Health
Kim, Jong-In ; Jeong, Hae-Cheon ; Won, Jun-Yeon ; Ka, Sung-Soon ; Oh, Bok-Sil ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 349~356
DOI : 10.14400/JDC.2014.12.4.349
This research is aimed to prove if harmful effects of smoking, as the main reason for recently elevated blood vessel disease, could be reduced by aerobic exercise, and identify the positive effects of the aerobic exercise on smokers` blood vessel health(blood pressure, pulse pressure, and blood vessel elasticity. Experiments were performed on 40 male smokers aged between 40 and 55, which was equally divided into two groups of Aerobic Exercise Group (AEG) and Non Exercise Group (NEG). After measuring each group`s blood pressure, pulse pressure, and blood vessel elasticity, AEG practiced aerobic exercise program for 50 minutes for each trial, three times a week, sustaining 12 weeks while NEG continued daily-life patterns without any special treatment. In 12 weeks, blood pressure, pulse pressure, and blood vessel elasticity of both groups were measured as the same way. As a result, the difference of systolic blood pressure between the two groups was not significant, while that of diastolic blood pressure was meaningful. The difference of pulse pressure between the two groups was meaningful, and that of blood vessel elasticity was also meaningful in all measuring points including left hand, right hand, left foot and right foot. As a consequent, it was found that aerobic exercise had positive effects on middle aged male smokers` blood vessel health.
Structure Model for Job Satisfaction and Service Quality of Staff of Geriatric Hospital
Shim, Gyu-Beom ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 357~366
DOI : 10.14400/JDC.2014.12.4.357
This study has been implemented to explore the method to improve job satisfaction and service quality of its staff by figuring out the effect of job satisfaction of geriatric hospital staff on service quality. For this reason, we conducted a questionnaire survey on April 2 to May 22, 2013 to target 300 people ten geriatric hospital workers in Busan Metropolitan City area, was utilized to study the final total of 276 parts. Firstly, It was found that work satisfaction, wage satisfaction and colleague satisfaction have an effect on job satisfaction, and Secondly, satisfaction and fellow satisfaction of business, were analyzed to affect, but had no effect conservative satisfaction Thirdly, for the effect of job satisfaction on the service quality, it was found that job satisfaction has an effect on service quality. Therefore, it can be concluded that service quality for patients can be improved only if job satisfaction of staff is improved, and by reducing stress caused by overwork of staff and boosting their morale through reasonable wage and compensation.
The influence of internet addiction on health behavior, sexual behavior and mental health of college student
Nam, Mun-Hee ; Kim, Jeoung-Mi ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 367~378
DOI : 10.14400/JDC.2014.12.4.367
The purpose of this study was to explore the factors related to internet addiction in college student of Korea. Methods: From November 19, 2012 until December 14, 2012, 300 college students from one of the universities located at K city were surveyed. This study is a cross-sectional survey of college students in K city, and data was collected through self-report questionnaires. Data was analyzed by Fisher`s exact test, independent t-test to identify different according to addiction group, and logistic regression analysis in order to factors related to on health behavior, sexual behavior and mental health of among college students. According to results, factors related to risk of addiction were lower frequency of exercise (p<0.05), no eat breakfast for 2 day (p<0.05), porno magazine/porno video contact pornography (p<0.05), subjective happiness index (p<0.05), and suicidal Ideation (p<0.05). This study suggest that exercise, regular diet, important of reproductive health, subjective happiness index and Suicidal Ideation are associated with internet addiction in College student. It is necessary to develop some preventive programs for those of internet addiction.
A Study on Development of the Job Functional Assessment Scale for people with Disabilities
Shin, Hyun-Uk ; Kang, Byeongro ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 379~397
DOI : 10.14400/JDC.2014.12.4.379
The purpose of this study was to develop the Job Functional Assessment Scale. This study was involved took third steps. First, 93 preliminary items were developed based on theoretical literature and International Classification of Functioning, Disability and Health (ICF) Model. To verify the content validity, 3 rehabilitation experts rated those items. Second, the scale consisting of 73 items was administered to sample of 880 people with disabilities. Finally, items of the scale were reduced to 58 items. Factor analysis showed evidence of construct validity of the scale. Internal consistency (Cronbach`s
) of total score showed .94 and Cronbach`s
of 7 subfactor demonstrated .74~.90. Thus, Job Functional Assessment Scale demonstrated satisfactory convergent validity and discriminant validity. In addition, the practical use of the scale was discussed.
Analysis of structural relationship among geriatric denture-related characteristics, denture satisfaction, and GOHAI
Kwon, Young-Ok ; Choi, Mi-Sook ; Lee, Jong-Hwa ; Yun, Hyun-Kyung ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 399~407
DOI : 10.14400/JDC.2014.12.4.399
The purpose of this study was to provide basic data necessary for improving the oral health of the elderly and quality of their lives by analyzing the relationship among the geriatric denture-related characteristics, denture satisfaction, and geriatric oral health assessment index. For this study, the elderly aged 65 or higher who resided in Euseong-gun, Yeongju-si, Andong-si, Gyeongsangbuk-do were surveyed from March 25, 2013 to May 9 of the same year. The results of this study showed that the denture satisfaction had high correlation with the `satisfaction with denture attachment`, `satisfaction with aesthetic function of pronunciation`, and satisfaction with masticatory function. Moreover, the causative relation was found to exist among the geriatric denture-related characteristics, denture satisfaction, and geriatric oral health assessment index. Thus, it is considered necessary to establish the institutional system and take measures that can improve the awareness towards the geriatric oral health education and geriatric oral health state with respect to effective use and management of denture.
A Study on Smartphone Addiction, Mental health and Impulsiveness For High School Students at Korea
Yu, Myeong-Ok ; Ju, Se-Jin ; Kim, Joo Hyun ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 409~418
DOI : 10.14400/JDC.2014.12.4.409
The purpose of this study is to verify the causal relationship between the smartphone addiction proneness, mental health, and impulsiveness of high school students in Korea. 804 first and second year high school students participated in the survey that included the Smartphone addiction scale, Korean Brief Mental Diagnosis Exam - the highest 25% of total score (Addictive SmartPhone Use Group : ASPUG 213 persons), the lowest 25% of total score(Non-Addictive SmartPhone Use Group : NASPUG 204 persons), BIS-II Impulsiveness Scale and additional questions asking for demographical characteristics. The outcomes of this study were as follows. First, sex, grade of high school, academic accomplishment, student`s satisfaction with school life, monthly allowance, the level of parental respect, having a opposite sex friend were related to smartphone addiction and impulsiveness. Second, ASPUG had worse mental health and impulsiveness than NASPUG, and the difference was statistically significant. Third, Students showed higher levels of mental health 9 subareas - anxiety, depression, phobic anxiety, Somatization, obsessive compulsive, interpersonal sensitivity, hostility, Paranoid ideation, Psychosis as their smartphone use increased.
Skin Whitening Effects of Angelica koreana and Cnidium monnieri Extracts
Cho, Wan Goo ; Kim, Cheong Tack ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 419~425
DOI : 10.14400/JDC.2014.12.4.419
The objective of this study is to estimate the inhibition of skin melanin formation by extract of Angelica koreana and Cnidium monnieri and the possibility of functional cosmetic materials through anti-irritation and stability test. The extract used in this experiment is White-
and the INCI name is Osthole. The main component of White-
was identified as coumarin and EC50 value was 2.7ppm by mouse melanoma B 16 cell test. White-
showed inhibitory effects 100 times lower concentration than arbutin. The main mechanism for skin whitening effect thought to be inhibition of tyrosinase-related gene expression. The basic essence formulation of White-
5% solution applied to the skin showed the effect of relieving skin irritation. White-
in an opaque container, under UV conditions for 4 weeks, and showed close to 100% recovery and 97% recovery under
for 4 weeks. Therefore, it is thought that White-
which helps skin whitening, relieving skin irritation and stable in UV condition is able to be used as the functional component in the cosmetic formulation.
Distribution and Management of Spatial Dose Rate in Neuro Angio Room
Lee, Mi-Hwa ; Jung, Hong-Ryang ; Lim, Cheong-Hwan ; Hong, Dong-Hee ; Kim, Ki-Jeong ; Kim, Sang-Hyun ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 427~435
DOI : 10.14400/JDC.2014.12.4.427
This study is performed in the intervention unit, during interventional procedures and in accordance with the direction and distance during the exposure indoor space is to measure the dose. I was classified at an angle of
counterclockwise from the phantom. Seven(A, B, C, D, E, F, G) were classified as direction. Length was measured from the center of the phantom. Each direction 50cm, 100cm, 150cm, 200cm were classified. I was analyzed by measuring of frontal, lateral, Bi-plan fluoroscopic Spatial dose rate in all 28 points. Measured dose was the highest at 50cm and over 200cm, dose was rapidly decreasing as increased distance. Dose was different more than nine times depending on the distance and direction, Installation of shielding wall can reduce exposure about 84.52% to 93.54%.
A Research about Spiritual Program Influence Upon the Anxiety and Depression of Women Going Through their Menopause
Jang, Yohan ; Kwon, Myoungjin ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 437~442
DOI : 10.14400/JDC.2014.12.4.437
Objectives: The objective of this study was to the effects of spiritual program on anxiety and depression among women in menopause. Methods: Subjects are 20 women in menopause. Structured questionnaires were used for data collection before, after and 6 month later Spiritual program, and descriptive statistics, t-test, ANOVA of SPSS 21.1 program were performed for data analysis. Results: Anxiety(F
A Study on Type of Clinical Experience of Adaptation of New Nursing Staffs in a General Hospital
Kim, Yun-Jeong ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 443~454
DOI : 10.14400/JDC.2014.12.4.443
This study designed to know subjective structure about clinical experience of adaptation of new nursing staffs in a general hospital and using Q-methodology. Using Q-methodology, 40 new nursing staffs sorted working a general hospital through personal interview. The statement positions on the sorting continuum were scored from +4(representing the highest level of agreement) through 0(at the neutral position on the continuum) through to -4(representing the highest level of disagreement). Factor analysis of the data was undertaken using PC QUANL program to determine if any patterns were discernible. The five types extracted all had eigenvalues greater than 1.0 and explained 62.38% of the variation in responses.: (1) New workload type, (2) Interest and responsibility type, (3) Improve the situation type, (4) Lack of knowledge and technology type, and (5) Excessive workload type. The significant differences found in the subjective structure of clinical experience of adaptation of new nursing staffs in ad general hospital. The findings of this study could contribute to the development of an effective programmes of education and personnel clinical practice strategies.
Online game fatigue system comparative analysis between China and Korea
Yuan, Fang ; Lee, Dong-Lyeor ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 455~460
DOI : 10.14400/JDC.2014.12.4.455
In this paper, in order to improve the online game fatigue system for the purpose of use in South Korea and China`s online game fatigue system analysis and comparison and find the problem and make improvements..Poisoning Prevention Youth Network game system, although many of the practical implementation of the research is very inadequate.So here we do it by comparing South Korea and China`s online game fatigue system, promote physical fatigue perfect game addicted youth to further resolve the issue.
The Research on the Comparison of Warrior Role with the Three Kingdoms an the Theme in the Korea-and-China Games - to GUAN YU as the Center
Ping, Sun-Shu ; Lee, Dong-Lyeor ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 461~466
DOI : 10.14400/JDC.2014.12.4.461
With the popularity of Japan`s "Three Kingdoms" series of games, the Three Kingdoms became popular and gave birth to the Three Kingdoms game for the traditional cultural resources and cultural industries. At the same time generate economic benefits and promote the traditional culture of double effect. With Liu Bei, Guan Yu and other roles in the development of cultural industries in each particular historical figure internationalization appearance design to get attention in the digital arts industry. In this thesis, three kingdoms cultures and three kingdoms generals were analyzed based on classic novel Three Kingdoms (三国演义). Guan Yu, China and South Korea in appearing common in the game as the center. Take example of the role of Guan Yu`s generals styling, clothing, weapons, color comparison, attempts to explore the international trend of historical figures game character.
A Study on the Cultural Interpreters and Muti-phased Tourism
Lee, Seung Jae ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 467~474
DOI : 10.14400/JDC.2014.12.4.467
This paper concerns the cultural tourism and the importance of cultural interpreters. Globalization has become a key word of 21st century, so the volume of tourists has been increasing. Furthermore, as the Korean wave has expanded to the world, more people are interested in Korea and Korean culture, and we observed the obvious increase of tourists. International tourists visit Korea with a variety of purposes, and their travel types are also diversified. This paper analyzes tourists` behavior based on the data provided by KNTO and briefly examines the cultural interpreters in 5 major organizations. Then considering the specific roles of the guides based on the Cohen (1985) and Lee (2011), I propose that the government should give more focus on the professional foreign language speaking interpreters for culture. As for an alternative to the present volunteering system for foreign languages, I strongly suggest multi-culture families or international students staying in Korea, for the wiser use of their abilities, their easy adaptation to the new world, and the peaceful coexistence.
Research on the Economic Impact and the Improvement the Keochang International Festival of Theatre
Lee, Jong-Won ; Park, Jeong-Bae ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 475~484
DOI : 10.14400/JDC.2014.12.4.475
This research was about the economic impact and the development plan by analyzing satisfaction and the contributions of Keochang International Festival(KIFT) that visitors recognize. It also sought ways to the development of an KIFT by conducting in-depth interviews with experts. According to the survey of visitors` recognition, KIFT contributed to the regional and the arts development. And it also showed that people recognize the contribution to imaging Keochang as the city of art. In regard to the visitors` satisfaction, they were satisfied generally with the festival and performance, but the satisfaction level was quite low with the traffic, service quality, etc. In respect to the economic impacts, the direct cost effect caused by holding the theater festival was 128,000 thousand won in 2013. Also the annual economic(indirect) impact on the production was 16 billion won, personal income 319,358 thousand won, added-value 7,549,540 thousand won, and taxes 780,733 thousand won.
Statistical Errors in a Research of Clothing and Textiles
Choi, Kyoung-Ho ; Choi, Jin-Hee ;
Journal of Digital Convergence, volume 12, issue 4, 2014, Pages 485~493
DOI : 10.14400/JDC.2014.12.4.485
The purpose of this study is to examine the statistical errors, which may occur in the process of applying statistics, by major stage of research, for greatly contributing to promoting research power through rightly utilizing statistics at the point of time that the application of statistics is increased in the research of clothing and textiles. As a result, it confirmed that there are many errors by each stage. First, it is a point that there was not any research that mentioned on the impact of analysis in the researches, which test the appearance of significance based on the collected data through experiment or survey. Second, the existence of mechanical description which is monotonous as well as not applying right analytical method in factor analysis. Also, even in case of cross tabulation, there was no hypothesis establishment.