• KSII Transactions on Internet and Information Systems (TIIS)
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• v.12 no.3
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• pp.1168-1188
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• 2018

Social Network Aggregators are used to maintain and manage manifold accounts over multiple online social networks. Displaying the Activity feed for each social network on a common dashboard has been the status quo of social aggregators for long, however retrieving the desired data from various social networks is a major concern. A user inputs the query desiring the specific outcome from the social networks. Since the intention of the query is solely known by user, therefore the output of the query may not be as per user's expectation unless the system considers 'user-centric' factors. Moreover, the quality of solution depends on these user-centric factors, the user inclination and the nature of the network as well. Thus, there is a need for a system that understands the user's intent serving structured objects. Further, choosing the best execution and optimal ranking functions is also a high priority concern. The current work finds motivation from the above requirements and thus proposes the design of a query processing system to retrieve information from social network that extracts user's intent from various social networks. For further improvements in the research the machine learning techniques are incorporated such as Latent Dirichlet Algorithm (LDA) and Ranking Algorithm to improve the query results and fetch the information using data mining techniques.The proposed framework uniquely contributes a user-centric query retrieval model based on natural language and it is worth mentioning that the proposed framework is efficient when compared on temporal metrics. The proposed Query Processing System to Retrieve Information from Social Network (QPSSN) will increase the discoverability of the user, helps the businesses to collaboratively execute promotions, determine new networks and people. It is an innovative approach to investigate the new aspects of social network. The proposed model offers a significant breakthrough scoring up to precision and recall respectively.

• Journal of Internet Computing and Services
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• v.19 no.4
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• pp.71-82
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• 2018

As the era of the $4^{th}$ industrial revolution began, it is possible to provide smart education by utilizing various new technologies. This paper included 6 steps to prove that the educational satisfaction of students' can be improved by applying the technology of the $4^{th}$ Industrial Revolution toward smart education. The first step is to review technologies of the $4^{th}$ industrial revolution that could enable smart education. The second step is to define areas that smart education should include by adopting technologies of the $4^{th}$ industrial revolution. The third step is to extract the keyword through literature review while the keyword can constitute the smart education for the defined areas. The fourth step is to present the research model by using the extracted keyword. The fifth step is to verify the proposed research model through questionnaires. The last step is to analyze the result of questionnaires to suggest better educational method. Consequentially, the purpose of this study is to verify the effectiveness of smart education by measuring students' expectation about smart education through questionnaire. As a result, students responded that the presented factors of smart education could maximize the effect of education by increasing the satisfaction of education. Therefore, it is necessary to utilize the technology of the $4^{th}$ Industrial revolution in the education field and apply the smart education method for better education.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.1
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• pp.103-108
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• 2011

The modern society with the wide spread recognition of the importance of informatics and for the development of information and communication technology is rapidly processing. Especially the rapid development in mobile technology boost up the general expectation that one can get the information he wants anytime anywhere. Accordingly image search for the convenient information retrieval is becoming common. However general image search has difficulties because inexactitude extracting character in the image and getting the detail information in extracted character. Therefore these paper make character recognition through the images that I photographed a sightseeing resort, a signboard of a lot of stores to a smart phone camera, so information offer to be convenient to users is a purpose. A user can get detailed information, by character extraction way called top-hat algorithm and connect to a server.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.4
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• pp.7-12
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• 2019

Ambient backscatter communication is limited to channel estimation technique through a pilot signal, which is a channel estimation method in current RF communication, due to transmission power efficiency. In a limited transmission power environment, the research of traditional ambient backscatter communication has been studied assuming that it is an ideal channel without signal distortions due to channel conditions. In this paper, we propose an expectation-maximization(EM) algorithm, one of the blind channel estimation techniques, as a channel estimation method in ambient backscatter communication system which is the state of channel following normal distribution. In the proposed system model, the simulations confirm that channel estimate through EM algorithm is approaching the lower bound of the mean square error compared with the Bayesian Cramer-Rao Boundary(BCRB) to check performance. It shows that the channel parameter can be estimated in the ambient backscatter communication system.

• Information Systems Review
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• v.12 no.1
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• pp.145-164
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• 2010

Since the third generation (3G) mobile communication service has been launched by most mobile communication operators in Korea, the portion of data service in mobile communication service becomes one of the most important factors in mobile communication service market. In past mobile communication market, most mobile communication operators made their profit mostly from voice communication service. However, the portion of profit from data service has gradually increased based on both video phone call and mobile Internet service. In this situation, LG telecom launched the full browsing mobile Internet service. This service provides a new type of mobile Internet service platform which enables to access the World Wide Web using mobile browsers, so we generally access the Web using web browsers in the desktop computer. Under the open network structure of mobile Internet like situation, it is very important to analyze the factors which can affect the competition between mobile communication service companies. So, in this paper, we first present the current state of full browsing service, followed by the expectation of its growth potentials and barriers. Then, we analyze the advantages and disadvantage of LG telecom as a first-mover and SK telecom/KTF as followers. Finally, based on this analysis, we predict the future competition among these companies and the market.

• Journal of Distribution Research
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• v.10 no.3
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• pp.15-36
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• 2005

This study is concerned with selling alliance in the internet shopping services, which is generally used by portal sites in recent and that is a typical form of strategic alliance. This study tried to find the relationship between. consumer's attitude and alliance performance. The authors investigated them in the field. then searched the reasons and determinants of selling alliance performance. As a result of field investigation, the authors found that the traffic of the portal site was not proportionated to the sales of internet shopping mall and this was not consistent with general expectation, With the analysis of it, the authors found that attitudes to the sites (brands) allianced in On-line and recognition of fitting between them had influenced positively on the attitude and purchase intention to alliance services. Moreover, unlike the attitude to the portal sites, the attitude to the internet shopping mall had positively influenced directly on the purchase intention. The other hand. from the view of influence power on the attitude to the allianced shopping service, the recognition of fitting between the sites was the factor which had the least effect of all factors. Compared with Off-line, this is interesting aspect of On-line. So in the On-line selling alliance, be careful of consideration for not only prior attitudes to the partners(portal and shopping mall) but also the fitness between them and make it in the mind that the attitude to shopping mall has greater influence upon the purchase intention than that to portal site.

• Korean Journal of Human Ecology
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• v.22 no.2
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• pp.301-313
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• 2013

Though customer delight is becoming one of the most important marketing key words, research in a retail setting is limited. With the dramatic growth of online retail shopping, this study explored customer delight experiences in online shopping malls by identifying the delight elements and analyzing the elements by online purchase steps. A total of 124 delight experiences collected from an unstructured questionnaire were content-analyzed. Delight elements in online shopping were categorized into service, product, price, delivery, package, and shopping mall operation in that order. Service related elements including free gifts and letters, recovery efforts for service failure, kind employees, and easy return were most frequently observed. Delights were experienced at the product receiving point, the prior-to-purchase point, the order-to-delivery point, and the post-purchase point in that order. The results revealed that customer delights in online shopping were experienced in various purchase steps by various marketing elements. Based on the results the study provided research propositions exploring the effects of expectation vs surprise, monetary vs non-monetary/emotional benefits/rewards, and core marketing elements vs augmented services on delight experiences.

• Korean Journal of Human Ecology
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• v.17 no.2
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• pp.279-292
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• 2008

The concept of "new consumer sovereignty" is playing a significant role in having the initiative of production and consumption of technology and culture trend. Today the 'new consumers' positively use digital and information technology in purchasing. To understand these consumers' new purchase tendency, the study examined the actual conditions 1) of consumers' use of digital and information technology, 2) of digital devide between consumers, and 3) the consumer's attitude to changes of their lifestyle which digital convergence could result in. The subjects were thousand male and female adults. The data were collected from a survey conducted by Embrain, a research firm in Seoul, in the period of June 1st, 2007 ${\sim}$ June 10th, 2007. The results show: 1. Most subjects have computers, their Internet use is their general life, and they have lots of exposure opportunities to digital information. They positively and actively use information technology. 2. Between male and female subjects, and between old and young generation there is a significant digital gap. But the gap between regional areas is statistically not significant. 3. The subject's attitude to digital convergence society shows both positive expectation and negative concerns. Concludingly, to embody a desirable digital convergence society, it is necessary to be searched the ways which can decrease the digital gap and policy to share benefit that information technology can give to consumers.

• The Journal of Korean Association of Computer Education
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• v.13 no.3
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• pp.65-75
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• 2010

Until now, the ICT have played an important role to overcome various limitations in education. The development of ICT has influenced for the changing methods of teaching and learning such as Computer-based education, Internet-based education, e-Learning. Lately, the expectation of educational evironment's changing is due to developing of the ubiquitous computing technology, it's vigorously going to be studying and implementing digital textbook including the ubiquitous features as mobility, intelligence, personality etc. the UDL is well-known as a strategy for teaching and learning using technology in the USA, first, to try understand the UDL, second, recommand the strategies in order to improve accessibility of korean digital textbook.

• Journal of Korean Library and Information Science Society
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• v.35 no.3
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• pp.321-339
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• 2004

The basis of public libraries as a service organization dependes on the customer's needs and expectation. Recently, public libraries have faced an existence crisis attacked from the development of Internet and the various cultural programs of other organizations. Thus, public libraries required continuos effort in order to get the existence necessity from community and customers. This paper investigates and compares with the public Service Charter provided a customer oriented public service, public library evaluation indexes by the Ministry of Culture & Tourism Gyeonggi Province, and a public satisfaction survey by Seoul Metropolitan. Thus this paper can provide the basis materials fur future public library evaluation.