• Journal of Information Technology Applications and Management
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• v.22 no.2
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• pp.123-148
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• 2015

Today the mobile devices including smart phones have influenced on the users' daily activities in the mobile internet society, and the expansion of social media has also affected on the purchasing behavior of consumers. This study examines whether the quality of corporate twitter, a typical social network service for call centers influences on the customer satisfaction, and brand loyalty. In order to achieve the research goal, the quality of twitter has been divided into four variables; information quality, service quality, system quality, and social quality. The results of our empirical analysis show that the three variables except service quality have significantly influenced on the customer satisfaction and the customer satisfaction also significantly has a casual effect on the brand loyalty. The empirical results are expected as a guideline to contribute on the practical improvement of customer service, satisfaction, and brand loyalty through corporate social network services such as corporate twitters in the future.

• International journal of advanced smart convergence
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• v.5 no.1
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• pp.51-58
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• 2016

Regarding the role of infrastructure in the university and education sector, which is the most important factor for securing future competitiveness of a country, timely application from qualified applicants is an important factor. Thus, this study is to propose creative value regarding education and certification for smart IT sector, which will be a major topic in continuous technology development over the next 10 more years, and to bring out ripple effects by policy research regarding education and certification for smart IT sector in the software-oriented society. This research on policy regarding education and certification for smart IT sector in the software oriented society can be used as a guideline in education and certification for smart IT sector at colleges and can be also used for establishing groundwork for completing practical education required in smart ICT field at colleges and for cultivating mobile app program developers required by enterprises.

• Journal of information and communication convergence engineering
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• v.2 no.4
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• pp.209-213
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• 2004

With the commercialization of CDMA 2000-1x late in 2000, a high-speed wireless Internet, based on a mobile communication networks, appeared in Korea. This will develop into the next-generation of mobile communications(4G) in the future and the new cell layout will be required the cellular configuration of 4G. We would need the legislation with respect to base-stations and to building the mobile communication networks, as well as the optimization of mobile communication systems. In this study, in order to provide 4G, I examined and analyzed that the current laws & regulations related to licensing and operating a mobile communication base-stations in KOREA.

• International journal of advanced smart convergence
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• v.6 no.3
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• pp.22-28
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• 2017

With the recent development of technologies to manage vast amounts of data, data mining technology has had a major impact on all industries.. Data mining is the process of discovering useful correlations hidden in data, extracting executable information for the future, and using it for decision making. In other words, it is a core process of Knowledge Discovery in data base(KDD) that transforms input data and derives useful information. It extracts information that we did not know until now from a large data base. In the decision tree, c4.5 algorithm was used. In addition, the C4.5 algorithm was used in the decision tree to analyze the difference between frequency and mortality in the region. In this paper, the frequency and mortality of percutaneous coronary intervention for patients with heart disease were divided into regions.

• Journal of IKEEE
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• v.1 no.1 s.1
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• pp.176-184
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• 1997

The Asynchronous Transfer Mode(ATM) networks are being adopted as backbones over various parts of Internet. Also, TCP is one of the most widespread transport protocols, nowdays. It can be used with ATM. But, TCP shows poor end-to-end performance on ATM networks. Effective throughput of TCP over ATM can be quite low when cells are dropped at the congested ATM switch. The low throughput is due to wasted bandwidth as congested link transmits cells from corrupted packets. This paper examines the behavior of TCP over ATM with limited bandwidth in a broadband environment. As multiple VBR sources occupies most of the available bandwidth, there has been a starvation effect, so TCP sources couldn't get the chance of transmitting data. Also, throughput is proportional to the amount of buffer.

• International Journal of Advanced Culture Technology
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• v.4 no.4
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• pp.70-74
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• 2016

Electronic commerce (E-commerce) using virtual reality (VR) has the advantage of being able to purchase products without restrictions of time and location by overcoming the limitations of existing offline transactions. It is still a rudimentary but fast growing technology, and the use of E-commerce in VR is expanding. The barriers that consumers might face in utilizing E-commerce in VR is the relevance to Information and Communications Technologies (ICT) technology. Fundamentally, it requires Internet access and use through PCs or mobile devices such as smart phones. Because unlike off-line markets, it is difficult to determine the purchase patterns of customers, customer purchasing behavior analysis must be done using computer access records. In order to expand and develop E-commerce in VR in the future, learning ability should be improved through combining with artificial neural network by deep learning that is recently in the spotlight, and the ability to overcome errors need to be improved to enable use in various fields.

• Electronics and Telecommunications Trends
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• v.25 no.2
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• pp.91-100
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• 2010

서비스 지향 아키텍처를 구현하기 위한 핵심 기술인 가상화 기술 가운데 네트워크 가상화가 미래인터넷에서 중요한 이슈로 부상하고 있다. 이는 다양한 사용자가 공유하는 네트워크 인프라 상에서 혁신적 설계에 바탕을 둔 아키텍처 및 서비스 등을 실현하기 위해 네트워크 가상화가 필수적으로 요구되기 때문이다. 하지만, 네트워크 가상화의 세부적인 기술이 무엇이며, 이들 세부 기술을 어떻게 적용할 것인가에 대해 시스템 개발자는 다양한 기술적 상황을 고려하여 결정해야 한다. 본 논문은 이러한 과정의 일환으로 미래인터넷 테스트베드에서 호스트 가상화, 라우팅 가상화, 슬리버 마이그레이션 등의 네트워크 가상화 세부 기술들에 대한 적용 방안을 다룬다.

• Electronics and Telecommunications Trends
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• v.26 no.5
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• pp.102-111
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• 2011

약 40년 전 설계된 현재의 인터넷은 보안 취약점, 사용자 이동성 지원 부족, 효율적인 콘텐츠 전달의 어려움 등 많은 문제점에 직면하고 있다. 특히, 스마트폰, 스마트TV 등과 같은 인터넷 접속 디바이스의 폭발적인 증가 및 대용량 비디오 트래픽으로 인한 트래픽 폭증 현상에 대한 대처 방안을 마련하는 것이 시급하다. 또한, 7.7 DDoS(Distributed Denial-of-Service), 3.4 DDoS 대란 등의 네트워크 침해 사태에 대한 근본적인 대처 방안을 마련하는 것 역시 매우 중요하다. 이러한 현재 인터넷의 문제점을 해결하기 위하여, 기존 인터넷과의 호환성을 고려하지 않고, 네트워크를 새로이 설계하고자 하는 "미래인터넷" 연구가 시작되었다. 본 고에서는 최근의 미래인터넷 연구 동향을 살펴보고, 특히 보안성을 해결하고자 하는 미래인터넷 보안 기술의 동향을 소개한다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1999.05a
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• pp.30-35
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• 1999

Recently, many companies want to accept and operate ERP(Enterprise Resource Planning) system in their fields ERP does not only include business, but also include finance, account, trade, personnel and BPR(Business Process Reengineering). Especially, it is necessary to have ERP system for companies which have lots of external businesses such as trade and communication sector. In modern society, the manufacture field faces on variable chances of Environment. For this situation, the application of Information technique is one of the main point maintain competitive power. The company should chose a proper method for their future and build Unified Information System on its suitable situation. Nowadays, Adjustment and application of technical method for Internet/Intranet and raised and more advanced Extranet gains its force at the moment. The Unification of ERP and POP system under the distributed environment like this will have a huge influence to us. In this subject, I will think about POP system for operating EPR system and improve its defects that can operate more effective sales, circulation, demand plan. Also, I suggest a proper POP system can handle seperated resources in each part of factory for a plan of shot period, order operating, factory inventory, process control.

• Korean Journal of Computational Design and Engineering
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• v.5 no.1
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• pp.12-22
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• 2000

Network and Internet technology opens up another domain for building future CAD/CAM environment. The environment will be global, network-centric, and spatially distributed. In this paper, we present an approach for network-centric feature-based modeling in a distributed design environment. The presented approach combines the current feature-based modeling technique with distributed computing and communication technology for supporting product modeling and collaborative design activities over the network. The approach is implemented in a client/server architecture, in which Web-enabled feature modeling clients, neutral feature model server, and other applications communicate with one another via a standard communication protocol. The paper discusses how the neutral feature model supports multiple views and maintains naming consistency between geometric entities of the server and clients. Moreover, it explains how to minimize the network delay between the server and client according to incremental feature modeling operations.