• Journal of the Institute of Electronics Engineers of Korea CI
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• v.48 no.2
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• pp.66-77
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• 2011

We propose a framework for grouping photographic advertising images that employs a hierarchical indexing scheme based on efficient feature combinations. The study provides one specific application of effective tools for monitoring photographic advertising information through online and offline channels. Specifically, it develops a preprocessor for advertising image information tracking. We consider both global features that contain general information on the overall image and local features that are based on local image characteristics. The developed local features are invariant under image rotation and scale, the addition of noise, and change in illumination. Thus, they successfully achieve reliable matching between different views of a scene across affine transformations and exhibit high accuracy in the search for matched pairs of identical images. The method works with global features in advance to organize coarse clusters that consist of several image groups among the image data and then executes fine matching with local features within each cluster to construct elaborate clusters that are separated by identical image groups. In order to decrease the computational time, we apply a conventional clustering method to group images together that are similar in their global characteristics in order to overcome the drawback of excessive time for fine matching time by using local features between identical images.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.2
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• pp.615-627
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• 2012

The market penetration of the smart phones has brought significant changes to the related industries. As the mobile phone market as well as the smart phone application market are growing rapidly, competition among small-size application developers has become severe. However, due to the severe competition and expensive market entry costs, the developers argue that it is necessary to develope the applications from the perspective of the users. However, studies on application development from the users' perspectives are still in the early stages and they have not provided various approaches. Therefore, based on the Open Coding method of Ground Theory, this study collected data on applications review from related communities and blogs of Korean web portal sites, and identified indices which users consider important when they use the applications. In addition, we conduct a comparative analysis between those indices by calculating their frequency of exposure. As a result, a total of 30 sub-categories of indicators such as amusement, controllability, versatility and ease of use appeared to be predominant to users and those lower categories were grouped into five categories; sensibility, design, technology, price, and social skills. The results of this study suggest to the application developers the guidelines of user oriented design and development. It can be used to develop the evaluation tool for application usability.

• Journal of Digital Convergence
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• v.15 no.11
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• pp.471-484
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• 2017

The present study explored factors that influence consumers' benefit expectancy about telemedicine service. Responses from a national online survey of 927 adults (aged 19-59), collected in January 2016, were analyzed with multiple regression analysis. The results revealed: (1) Health consciousness positively influenced all three benefit expectancies (all ps < .05); (2) Doctor-patient communication efficacy positively influenced expectancy for convenience improvement (${\beta}=.107$, p < .01) and service quality improvement (${\beta}=.086$, p < .05); (3) Use of health-related smart applications contributed to positive expectancy for service quality improvement (${\beta}=.081$, p < .05) and cost-saving (${\beta}=.067$, p < .05). Some of the relationships were moderated by gender and residence. This convergence study, which examined public's perception about telemedicine from the perspectives of consumer psychology, media, and public health, provides practical implications to promote telemedicine service and educate consumers about it.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.25 no.5
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• pp.1131-1141
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• 2015

In this paper, we proposed a new approach of machine learning based method for detecting game-bots from normal players in MMORPG by inspecting the player's action log data especially in-game money increasing/decreasing event log data. DBSCAN (Density Based Spatial Clustering of Applications with Noise), an one of density based clustering algorithms, is used to extract the attributes of spatial characteristics of each players such as a number of clusters, a ratio of core points, member points and noise points. Most of all, even game-bot developers know principles of this detection system, they cannot avoid the system because moving a wide area to hunt the monster is very inefficient and unproductive. As the result, game-bots show definite differences from normal players in spatial characteristics such as very low ratio, less than 5%, of noise points while normal player's ratio of noise points is high. In experiments on real action log data of MMORPG, our game-bot detection system shows a good performance with high game-bot detection accuracy.

• Korean journal of communication and information
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• v.62
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• pp.51-73
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• 2013

This study is an attempt to find out the meaning of game to middle-aged women who enjoy internet web board game as part of the leisure. In order to discover the perceptions and emotions of middle-aged women regarding game, in-depth interviews with the five women of 48 to 63-year-old were conducted. The results are: First, the web board games to middle-aged women is an opposition of labor, but at the same time a part of day-long procedure of labor. Second, most middle-aged women are not in an autonomous environment where they can pursue active hobbies. Third, middle-aged women do not tolerate sacrificing money or housework on game because the web board games are regarded as a worthless activity. Finally, middle-aged women do not transform the existing social relationships into online relationships, nor form new social relationships through internet. Based on these results, we could draw a rough picture overviewing the gaming experience of middle-aged women, which has been more or less ignored in academic field. game experiences; middle-aged women; web board game; leisure/labor; game culture;

• Culinary science and hospitality research
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• v.18 no.1
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• pp.156-167
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• 2012

The purpose of this study is to examine the structural elements of HMR in Korea foods and explore the way HMR products using Korean foods can be developed at this time of increased interest. Through an investigation of its importance by attributes and their partial values, hypothetical HMR products using Korean foods were estimated. In order to develop the optimal HMR goods of Korean food, a preference survey was conducted after selecting 9 profiles using conjoint analysis with orthogonal design, and 4 holdout sets were generated and used for cross-validity authorization and reliability of the model. The results of this study showed that customers put cooking levels, menu price, and the location of purchase into importance when selecting HMR products of Korean foods. They preferred to eat the products after sufficiently heating them and buy the products sold online and through home shopping programs, with the price range of 10,000 won and over. It was concluded that more customers can be attracted if a variety of HMR products using Korean foods which can be prepared readily anywhere and at any time are developed.

• Korean Journal of Community Nutrition
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• v.22 no.3
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• pp.248-258
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• 2017

Objectives: The purpose of the study was to develop a series of education materials as a card news format to provide nutrition information for pregnant and lactating women. Methods: The materials were developed in seven steps. As a first step, the needs of pregnant and lactating women were assessed by reviewing scientific papers and existing education materials, and by interviewing a focus group. The second step was to construct main categories and the topics of information. In step 3, a draft of the contents in each topic was developed based on the scientific evidence. In step 4, a draft of card news was created by editors and designers by editing the text and embedding images in the card news. In step 5, the text, images and sequences were reviewed to improve readability by the members of the project team and nutrition experts. In step 6, parts of the text or images or the sequences of the card news were revised based on the reviews. In step 7, the card news were finalized and released online to the public. Results: A series of 26 card news for pregnant and lactating women were developed. The series covered five categories such as nutrition management, healthy food choices, food safety, favorites to avoid, nutrition management in special conditions for pregnant and lactating women. The satisfaction of 7 topics of the card news was evaluated by 140 pregnant women, and more than 70% of the women were satisfied with the materials. Conclusions: The card news format materials developed in this study are innovative nutrition education tools, and can be downloaded on the homepage of the Ministry of Food and Drug Safety. Those materials can be easily shared in social media by nutrition educators or by pregnant and lactating women to use.

• Journal of The Korean Association of Information Education
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• v.14 no.2
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• pp.261-271
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• 2010

NEIS (National Education Information SystTem) provides educational information to parents while students are not able to have the direct access to their own academic information. Students filed their request to the National Human Right Agency. The objective of this study is to investigate the feasibility of students direct access to their own information and how to do it. In detail, online survey was conducted from 3,300 students, teachers and parents who are the stake holders of student information service on NEIS regarding whether they are for it, if so how to do it. The result indicated that students, parents and teachers are all positive in that order. It is unexpected that teachers who need to input and are responsible for the accuracy and reliability for student information are also for it. Although the human right law suggests all students have the right to direct access to their own information, the order of operation can be from secondary school level if the operation can not be done all at the same time. The range of information provided through this service is in principle the same as what parents can access except the counseling information.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.15 no.4
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• pp.217-230
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• 2020

In a view of rapidly changing business environment, the success and competing power of organizations depend on committed, highly motivated and satisfied human resources. Empowerment is mainly concerned with establishing and building trust between management and employees, and motivating their participation. Also, behavioral integrity emphasizing on the characteristics of effective leaders has shown as direct action that strengthens positive consequences in organizations. However, research regarding behavioral integrity is very limited. Based on the Self-determination Theory, this paper investigates the effect of empowering leadership on employee's job satisfaction and work engagement. Multi-group analysis based on behavioral integrity is also analyzed. An online survey was conducted and 298 employees' data were collected. Using structural equation modeling, results suggest as follows. First, empowering leadership had a positive effect on individual's job satisfaction mediated by their work engagement. Second, the result of the multi-group analysis showed that the effect of empowering leadership on work engagement is stronger in the group with high behavioral integrity. Contrary to the prediction, the result doesn't support the moderating effect on job satisfaction. These findings contribute to our understanding of empowering leadership process. Based on the results, several theoretical and managerial implications are discussed.

• Information Systems Review
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• v.10 no.2
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• pp.71-96
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• 2008

Interactive Video Service(IVS) is a new type of media service that enables users to interact with others in the process of casting and watching videos in a system. 'Timing flexibility', which divides IVS into real-time IVS and non-real-time IVS, is one of the significant factors of interactivity. The objective of this study is to identify critical factors of interactivity in IVS and to compare their effects in terms of timing flexibility. To achieve the objective, prior literature has been reviewed to establish a theoretical framework, and twelve active users of IVS have been interviewed to develop research model of IVS. Finally, an online survey has been conducted to verify the research model. The results indicate that Technical Factor, Communication Factor, and Contents Factor of IVS are found to be the important interaction factors in IVS; and their impacts on the intention to use IVS were found to be affected by timing flexibility. This paper ends with theoretical and practical implications of study results.