• Journal of KIISE:Information Networking
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• v.34 no.5
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• pp.340-347
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• 2007

Vehicle safety service can be effectively achieved with inter-vehicle communication technologies, in which moving vehicles transmit a safety related urgency information such as traffic accidents, sudden stops, obstacle appearance etc. They usually utilize a broadcast of message propagation method because the communicating vehicles are not known each other. The pure broadcasting scheme does not satisfy the requirements of vehicle safety communication service due to the transmission delay with frequent message collisions. To resolve this problem, this paper presents a group based propagation method for the multi-hop transmission, in order to deliver an urgency message to the reasonable size of vehicle troop. A group header is elected in considering of the position information of vehicles and radio transmission range. And a vehicle equivalent group is formed with the header. With benefits of the group based transmission, it is possible to minimize the unnecessary transmission and the possibility of message collisions. Simulation results show that the message propagation performance is so stable regardless of vehicle's congestion degree.

• KIISE Transactions on Computing Practices
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• v.20 no.12
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• pp.688-693
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• 2014

With the advent of ubiquitous environments, the smart phone has come into wide use and the demand for various content increases. Thus, in order to efficiently utilize limited resources cognitive radio technology is regarded as a possible solution. Besides spectrum sensing or access schemes, the provision of VoIP traffic service for secondary users with limited spectrum resources is a very important issue. In this paper, a resource allocation and control system for VoIP QoS provision in cognitive radio networks is proposed. Firstly, as the system model, the time structure of the network is addressed and, according to the structure, a bandwidth broker is proposed. In addition, based on available bandwidth estimated by the bandwidth broker, a connection admission control for secondary users is developed. It is demonstrated that the provision of VoIP QoS is greatly affected by channel utilization, the number of channels, and the length of timeslot.

• KIISE Transactions on Computing Practices
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• v.21 no.10
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• pp.623-630
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• 2015

In this paper, the design and implementation of an automatic reference-citation-mark attachment system are introduced. The system automatically attaches a citation mark to the end of a sentence in a technical document if the corresponding statement has a high similarity to another statement in the same document; simultaneously, the corresponding bibliographic data is automatically created from the cited-document information. In accordance with functional specifications, a Web-based, online service model and the development of its prototype system are proposed. The developed system can help in the elimination of unexpected plagiarism issues, and will alleviate the burdens of reference citation and reference-list creation for technical writers.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.159-160
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• 2017

본 논문에서는 무인기를 통해 수집한 영상을 과학적 분석 및 매핑이 가능한 영상으로 산출하는 자동 기하보정 시스템을 제안한다. 해당 시스템은 무인기를 활용하여 상시적으로 재난 상황을 촬영하여 감시 및 분석을 하며, 무인기에 탑재된 다중복합 센서 데이터의 실시간 처리 분석을 통해 국지적 홍수 재난의 감지 예측 및 상황대응을 지원하고, 통합경보 시스템과 연동하여 대국민 재난 정보를 제공하는 서비스를 위한 요소 기술이다. 현재 본 서비스를 제공할 수 있는 Front to End 시스템이 개발 완료되어 실제 필드에서의 재난 감시 및 예측 성능을 검증하기 위한 필드 테스트를 준비 중에 있다. 이에 본 논문에서는 현재 구축하고 있는 홍수 재난 관리 플랫폼에 대한 내용을 간단히 소개하고, 중요한 기능중 하나인 무인기 촬영 영상의 자동기하보정 시스템에 대해서 논한다.

• 한국IT서비스학회:학술대회논문집
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• 2009.05a
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• pp.293-301
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• 2009

리더십이란 조직을 이끌어 가기 위해 발휘하는 능력이라고 정의할 수 있다. 최근 산업계뿐만 아니라 학계 등에서는 리더십 관련 연구에 관심이 고조되고 있다. 리더십의 종류에 따라 조직의 성격과 문화, 생산성 등에 많은 영향을 미칠 수 있기 때문이다(Manz와 Sims, 1987). 리더십과 관련한 많은 연구들은 주로 경영학 분야뿐만 아니라 산업심리 혹은 심리학 분야에서도 많은 관심을 보이는 연구 분야다. 특히 최근에는 셀프리더십(self-leadership) 관련 연구가 학계, 산업계에서 더 많은 관심이 모아지고 있다. 본 연구는 정보기술(information technology)관련 과목을 수강하고 있는 대학재학중인 학생들의 셀프리더십 정도가 학업성과에 어떤 영향을 미치는 지를 연구하고 한다. 연구의 결과는 대학생들의 셀프리더십을 고양하므로써 학업성과를 촉진할 수 있는지 여부에 대해 시사점을 줄 수 있을 것이며, 나아가 기업의 생산성을 제고할 수 있는 리더십 프로그램 개발에 도움을 줄 것이다.

• Proceedings of the Korea Contents Association Conference
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• 2018.05a
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• pp.477-478
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• 2018

한국과학기술정보연구원(KISTI)에서 구축 운영하고 있는 온라인 아이디어사업화 플랫폼은 창의적 아이디어의 발굴 육성 확산을 통해 국민의 아이디어를 가치화하는 아이디어사업화 지원 플랫폼으로, 창의적 문화와 창업 확산의 중요한 역할을 수행하고 있다. 본 연구에서는 온라인 아이디어사업화 플랫폼의 PC환경 웹사이트와 모바일 이용자 형태를 분석하여 모바일 환경에 간소화된 핵심 메뉴구조와 최적화된 UI/UX, 모바일 장치의 특성을 활용한 모바일 웹 서비스 구축으로 언제, 어디서든, 자유롭게 서비스를 이용할 수 있는 방안을 제시하고자 한다.

• The Journal of the Korea Contents Association
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• v.20 no.8
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• pp.359-367
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• 2020

WSNs as the main technology of IoT often deliver information or authenticate based on location. Thus, verifying location information is essential. This paper aims to present the comprehensive analysis and classification of location verification techniques in WSN. For this, classification criteria are suggested based on the result of feature analysis of existing techniques. In addition, the existing techniques are classified according to the suggested criteria, and each characteristic and development direction are described. The result of this paper is expected to be a useful reference material when designing a new technique.

• Science of Emotion and Sensibility
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• v.11 no.4
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• pp.461-480
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• 2008

There are innumerable studies on technology adoption and usage continuance; most examine cognitive factors while affective factors or the feelings of users are left relatively unexplored. Although attitude and user satisfaction are factors commonly considered in Information Systems(IS) research, they represent only some aspects of feelings. In contrast, researchers in diverse fields have begun to note the importance of feelings in understanding and predicting human behavior. Feelings are anticipated to be essential particularly in the context of modern applications, such as mobile internet(M-internet) services, where users are not simply technology users but also service consumers. Drawing on the support of consumer research, social psychology and computer science, this study proposes a balanced cognition-affect model of IS continuance. Prior works in relation to IS research have already considered the emotional factors. The common factors are enjoyment, anxiety, affect and satisfaction. The main difference in our study is that the factors that we used are the primary dimensions of affect according to Circumplex Model of Affect. The horizontal axis of the model represents the pleasure dimension and the vertical represents the arousal dimension. Other emotional factors such as enjoyment and anxiety can be viewed as a combination of these two dimensions, and they can be placed in the vector space formed by these two primary dimensions. Affect has been defined as the enjoyment a person derives from using computers. Satisfaction has different conceptualizations. It has been conceptualized as judgment based on the expectation disconfirmation theory. Thus, while prior works considered the direct and indirect effects of "feeling-related constructs"(enjoyment and anxiety) on usage behavior, our study proposes effects of "feeling-based constructs"(pleasure and arousal). The balanced cognition-affect model is tested in a survey of, M-internet service users. The results establish the validity of the model.

• Journal of Information Management
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• v.38 no.1
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• pp.21-36
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• 2007

This study aimed to investigate present status of online reference shelf and analyze access point in the home page and types of online reference sources in the university library. Data were collected by accessing home pages of 41 university libraries in the region of Seoul and Kyonggi-Do. 30 libraries had prepared reference shelf out of 41 libraries, and "User Service", "Electronic Reference Sources", or "Reference & Information Sources" were mostly used as home page menu. Types of references sources varied among libraries, and "Directories", "Dictionaries", "Statistics" or "Encyclopedias" were mostly loaded types in the reference shelf. For the enhancement of reference services through reference shelf, establishing and applying standards for evaluation, ease of access, access by subject, and continuous updates and additions of reference sources were suggested.

• Journal of Information Management
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• v.34 no.1
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• pp.1-18
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• 2003

The purposes of the study were to identify the characteristics and types of grey literatures, to investigate the factors restricting the sharing of grey literatures in Korea, and to make recommendations for the efficient collection and utilization system of grey literatures being produced and managed by either government agencies or government-supported research institutes in Korea. A survey instrument was designed to measure the current status of grey literature management systems and to elicit expert opinions from information professionals in information centers for an efficient system of grey literatures. It was found that information professionals considered the technical reports as the most important type of grey literatures, but maps and dissertations as the least important type of information value. Related to the participation for the central system of grey literatures, many respondents preferred to utilize the grey literatures owned by other information centers, but they showed a neutral interest level in sharing their information centers' grey literatures with other centers.