• Proceedings of the KAIS Fall Conference
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• 2009.12a
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• pp.953-956
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• 2009

무선 센서 네트워크에서 이동하는 표적의 위치를 추정하기 위한 연구는 센서 노드의 에너지가 제한 되어 있어 센서 노드 상호간의 협력적인 신호처리 기법이 필수적이다. 기존의 무선 센서 네트워크에서 이동 표적의 위치를 추정하는 방법은 각 센서 노드에서 이동 표적으로부터 수신된 신호를 이용해 수신신호강도, 잡음제거, 압축 등의 신호처리를 수행하고 기지국으로 전송하는 형태이다. 이런 기존의 기법은 애드 호크 방법의 무선 센서 네트워크에는 적용이 어렵고, 각 센서 노드에서 신호처리 및 통신에 의한 에너지 소모가 크기 때문에 무선 센서 네트워크의 생존 시간이 짧아지게 된다. 본 논문에서는 웨이블릿 기반의 무선 센서 네트워크의 협력적 신호 처리 방법을 제안한다. 제안된 방법은 웨이블릿 변환을 이용한 센서노드에서의 에너지 효율적 특징추출을 수행하고 각 센서 노드간의 특징 전송을 통해 표적의 위치를 추정한다.

• Journal of the Korea Computer Industry Society
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• v.4 no.4
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• pp.599-606
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• 2003

As collaborative computing technology goes widespread, interactions among concurrent users are very important, especially in education domain. But existing co-authoring mechanisms and CSCW technologies have limitations for conflict handling. In general, co-authoring tools provide solutions that one or certain users' views are influenced for conflict handling. These solutions have advantages to accomplish rapidly for conflict handling, but other authors' views cannot be affected sufficiently. In this paper, we define the courseware as network structure of instructional units. And we propose co-authoring model for courseware using collaborative conflict-handling mechanism. Using this mechanism, instructors can affect their own viewpoints to the unique courseware. As contents created in these forms have multiple structures. it can provide proper materials according to students' requirements. Therefore, it can provide students with individual learning facilities on online educational systems. Proposed model is useful for courseware based on structured form of document such as XML.

• Journal of the Institute of Electronics and Information Engineers
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• v.50 no.1
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• pp.15-20
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• 2013

An energy detection based spectrum sensing is widely known to be susceptible to the noise power uncertainty. As one of the methods to resolve this problem, a cooperative spectrum sensing based on an energy detector with double thresholds has been published recently. However, its performance analysis under a fading channel has not been carried out yet. In this paper, we present a closed form of performance analysis of the scheme by extending our previous work on evaluating the performance of an energy detector in the presence of noise power uncertainty.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.4A
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• pp.318-324
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• 2011

In this paper, three coordinated random beamforming (CRBF) schemes are analyzed in a two-cell symmetric interference channel. A simple partial coordination of RBF with base station selection (BSS) is shown to achieve the same average sum rate performance of CRBF with joint encoding (JE). To improve the sum rate performance further, we also propose a transmission mode selection (TMS) between the BSS and JE which is shown to have additional sum rate gain for the large number of users. Simulation results verify the eectiveness of the proposed CRBF schemes and accuracy of the proposed analysis.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.2
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• pp.403-408
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• 2010

In this paper, we design and implement the iMPS(Integrated Project Management system). The iMPS is used in the performance evaluation which establishes the systematic management of support for Industry-Academy-Research Cooperation. The implemented iPMS mainly contain functions. First, the search function produces a report for result on the status of numerous projects and allows administrators to track project status in a excel file format. Second, the management function produces a performance evaluation, monitoring. Applying the iPMS to management of Busan-Ulsan Association of industry-academy cooperation, its usefulness is from the results of web service.

• Journal of The Korean Association For Science Education
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• v.41 no.4
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• pp.339-358
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• 2021

This study explores the agency of a student leader, expressed through efforts to distribute power and encourage participation in elementary scientific modeling classes. The study also analyzes the context in which the leader's agency was expressed and the context in which the development of a collective agency was constrained. The participants were 22 fifth-grade students. The leader's agency was analyzed by examining his words and actions. As a result, at the outset of the study, the leader had the most power, performing all the activities as the sole authority in a non-cooperative participation pattern. However, with reflection and help from the researcher, the leader recognized the problem and facilitated the participation of other students. He developed an identity as a teacher and demonstrated the agency. The leader's agentic behaviors can be categorized into three aspects. First, regarding the cognitive aspect, the leader helped other students participate in modeling by sharing his knowledge. Second, regarding the normative aspect, he made rules to give all students an equal voice. Third, regarding the emotional aspect, the leader acknowledged the contribution of the students, increasing their confidence. The leader's agency temporarily helped the group to overcome the student hierarchy, facilitating a cooperative participation pattern. However, the development of a collective agency was constrained. The power of the leader was partially redistributed, and the other students did not position themselves as equal to the leader. To support the leader's agency to develop into a collective agency, it is necessary to redistribute the power of the leader more equally and to change the recognition of students.

• Proceedings of the Korean Information Science Society Conference
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• 2006.06b
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• pp.199-201
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• 2006

유비쿼터스 시대의 컴퓨팅은 사용자의 의향과 상황을 인지해 동적으로 목표를 설정하고 자동으로 협력해 목표를 해결하게 된다. 다양한 형태의 Context가 개체로부터 수집될 것이며 이러한 정보를 기반으로 Domain-Specific한 지식의 효율적인 처리가 가능할 것이다. 이를 위해 다른 형태의 Context를 처리하기 위해서는 기계가 인지 가능한 형태로 변형되어야 한다. 본고에서는 다중 에이전트 시스템에서 다양한 지식일과 에이전트들간의 의미적 상호작용을 증대시키기 위한 Contents Description Model을 통하여 지식원의 활용을 원활하도록 지원하는 처리를 제시한다.

• Journal of the Korean Society for Library and Information Science
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• v.42 no.4
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• pp.463-480
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• 2008

This study was to review the possible characteristics and patterns that occur when comparing control language constructing guidelines, by analyzing the formal characteristics of folksonomy tags in university libraries. Based on subjected tags at university libraries for a period of 6 months the structure and form of folksonomy was examined. The object tags were analyzed based on the thesaurus development guidelines. The results for this research will provide baseline data for the use of folksonomy tag applications in digital libraries.

• 한국경영정보학회:학술대회논문집
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• 2007.06a
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• pp.1030-1035
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• 2007

변화가 잦은 환경에서, 기업은 다른 조직들과의 유기적인 협력과 의존을 바탕으로 생태계(Ecosystem)를 이루고 있다. 이러한 조직간의 유기적인 형태를 기업생태계(Business ecosystem)라 하고, 기업생태계를 이루는 각 조직들은 기업생태계 전체와 운명을 공유한다. 기업이나 조직은 기업생태계 안의 개체가 되며, 각 개체는 생태계 안에서 고유한 역할을 하고, 생태계를 유지하는데 중요한 역할을 한다. 기업 전략의 범위를 기업 내에 한정하지 않고, 해당 기업이 속해있는 기업생태계의 범위로 확대하여 보고자 하는 이러한 관점에서, IT는 중요한 역할을 한다. 첫 째, 기업생태계는 기업 네트워크의 확장된 개념으로 파악할 수 있는데, 이러한 기업생태계에서 개체간의 상호작용에 IT가 중요한 역할을 한다. 두번째, 기업생태계에서는 외부의 자극이나 개체의 상태가 전체 건강성에 영향을 미치는데, 기업생태계를 다이나믹하고 건강하게 유지시키는데에 IT가 필요하다. 본 연구는 기업의 전략적 운명 공통체로써의 기업생태계에 대한 기존연구를 통해, 기업생태계 관점에서 IT 역할을 파악해야 할 필요성을 제시하고, IT역할 구분 시에 필요한 지침에 대해서 논의하여, 추후 수행될 연구의 기반을 마련하는 것을 목적으로 한다.

• Journal of the Korean Professional Engineers Association
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• v.12 no.3
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• pp.12-17
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• 1979

The form of the Enterprise of the L.N.G project Consists of such three enterprises that the Construction and operation of the liquefcation plant of the Natural gas, and L.N.G. tankers Operating enterprise and the receiving and storaging plant of the L. L.N.G., above mentined three enterprises Concerned with capital and technique mutually, and so it arises such results that the foundmental requirements of the fuel the long-term and safty-price suply of the L.N.G. are met.