• The Transactions of the Korea Information Processing Society
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• v.1 no.3
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• pp.357-366
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• 1994

The IEEE 802.4 token bus has been widely accepted as the standard for factory local area networks. The priority option of the 802.4 standard supports multiple classes of traffic by using a set of timers to control information exchange. The performance of the 802.4 priority mechanism in industrial real time control is examined. A timer assignment technique is presented for such applications. The timers are set to satisfy the worst case access delay requirements of real time control applications. Other applications that are not time constrainted can be supported simultaneously. In fact under certain conditions, such applications can also be guaranteed a minimum bandwidth allocation. Simulation results are used to evaluate the timer assignment and utililization.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.16 no.2
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• pp.109-121
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• 2021

With the recent increase in senior retirement, and senior start-ups are becoming more active due to high interest in start-ups. Research on young entrepreneurship, including college students, is being actively conducted, but most of the preceding research on senior entrepreneurship was conducted mainly on personal characteristics and social environment, and there were not many empirical studies on the influencing factors of entrepreneurship support policies. In this study, research and discussion on the entrepreneurial support policy and entrepreneurial competence as the influencing factors of senior entrepreneurship. As the independent variable of this study, the founder's competency was adopted as two factors: technical competence and creative competency, and the entrepreneurial support policy was divided into education support and funding support. Mentoring was set as a controlling variable and entrepreneurial intention was set as a dependent variable. A total of 232 questionnaires collected from seniors in their 40s or older were empirically analyzed. To verify the hypothesis of the study, SPSS 23 was used for exploratory factor analysis and regression analysis, and Process 3.4 was used for moderation effect. As a result of the study, it was found that the factors of technical competence, creative competence, educational support, and funding all have a significant influence on the will of entrepreneurship. It was found that creative competency(𝛽=.318), funding support(𝛽=.188), educational support(𝛽=.152), and technical competence(𝛽=.139), in this order, influenced the entrepreneurial intention. It was verified that the moderating effect of mentoring was significant between technical competence, creative competence, and entrepreneurial intention, but the moderating effect of mentoring between educational support, funding and entrepreneurial intention was not. The implications of this study will contribute to the research of senior start-up support policies, institutional supplementation, and differentiated start-up support programs by studying the factors of senior start-up capabilities and start-up support policies. It is also believed that it will contribute to the search for ways to increase creative capabilities that have a high influence on the willingness to start a business and the expansion of mentoring functions.

• Journal of Convergence for Information Technology
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• v.9 no.10
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• pp.48-55
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• 2019

This study argued problems and improvement of export support system for SMEs in the uncertain world global trade environment with G2(US-China) risk. In SMEs export support system, The authorities needs stronger control tower to promote consistent export support policies. There is also another problem of repetitious work that export support system has been operated by individual project. In order to overcome these problems, first, the authorities set clearly organization to control various export support policies. Second, export support system needs the efficient operation based on long term road map. Third, the authorities defines clear roles and responsibilities of supporting units, and enhances cooperation between the different organizations. Finally, the system should arrange performance evaluation index and feedback system to build the desirable export support system.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.14 no.2
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• pp.15-30
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• 2019

This study investigates the effects of venture capital investment and corporate venture capital investment on the performance of IPOs listed on KOSDAQ between 2000 and 2014. We classified venture firms with venture capital-backed companies and non-venture capital-backed companies, having the former of which further divided into corporate venture capital-backed companies and independent venture capital-backed companies. The time window of the analysis was set to between 2 years before and 3 years after IPO. Main results of this study reveal that there is little difference between venture capital-backed companies and non-venture capital-backed companies in terms of profitability before and after going public. However, we found out that after IPO venture capital-backed companies display higher ROA than independent venture capital-backed companies or non-venture capital-backed companies, suggesting that corporate venture capital-backed companies might be more advantageous in growing a venture capital ecosystem in Korea.

• Korean Journal of Social Welfare
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• v.58 no.1
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• pp.31-58
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• 2006

The purpose of this article is to analyze the structure and characteristics of the care manager systems of the long term care insurance in Japan's social welfare institution. In order to realize such purposes, this paper develops the discussion process as follows. Firstly, this paper examines the developmental processes and contents of the long term care insurance system and the care plan services which are the services to aid the utilization of long term care services. Secondly, this paper describes the care manager which conducts the role of care plan services intentively. Thirdly, this paper makes the research framework which is formulated as the legislative views about the care manager on the long term care insurance act, task systems, recruitment and retraining systems, and research data of care manager. Summarizing the contents of care manager's circumstances and characteristics about the long term care insurance, the results are explained as follows. that is to define care manager's status as the components of care plan center, to control indirectly the activities of care manager's care plan by operating care service center and care plan center in equal corporate, to set role and task ambiguously, to recognize care manager's role as the attributed role of care service center, to give licence and qualification in local government. Therefore, it's difficult to realize care plan depending on speciality and neutrality for the service user. The essential parts for the reform of care manager systems may be to separate care service center and care plan center and to redefine the task and role of care manager, the role and task of which should be put on care plan services.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.9 no.6
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• pp.47-64
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• 2014

Considering the network externality and spill-over effects, this paper constructs the theoretical model for analyzing the financial policies focusing on the credit guarantee system for Creative Economy, which has been set as the new policy paradigm for the Korean Economy. The analytical results show that it is as much as important to improve the efficiency of the financial markets and construct the infrastructure for reducing the information asymmetry problem which would be more serious in the creative finance. Although it is important to fill the gap due to the market failure it is also crucial to construct the appropriate financial schemes for the various stages of the innovative firms growth. Without these, the impacts of current public funding policies may crowd out the amount of private market funds for the innovative firms or reduce the possibility of commercialization of new technologies in these firms. Based on the evaluation of current related public policies from the perspectives of creative finance, we imply that the current financial policies appear to be quantity oriented not the quality based. Although the policy goals would be appropriately set for vitalizing the Creative Economy in Korea, they appear to be still unsuccessful to address the information asymmetry issue which is the major concern in vitalizing the creative economy. Thus we emphasize the market friendly policies, risk-sharing between the various market participants, revitalizing the relationship banking and efficient management of credit guarantee system in Korea based on the analytical model as well as the evaluation of related policies regarding the creative economy.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.16 no.3
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• pp.511-521
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• 2012

JXTA technology is a set of open protocols that enable any connected device on the internet or MANET(Mobile Adhoc NETwork) to communicate in a P2P manner. In this paper, we present a JXTA-based smartphone collaborative application. For this, we define the core services and collaborative services necessary for a P2P network, and design proper protocols to support the services. The developed application provides the effective environment for group works in smartphones, supporting the various virtual workspaces. Since application supports the group works among users in close-range without relying on the mobile network, it could be very useful in various situations such as the disaster area.

• Archives of design research
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• v.17 no.3
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• pp.373-382
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• 2004

Video protocol analysis is a popular and effective technique in many research disciplines including industrial design and HCI for understanding the interactions between people, and between people and machines. Analysing and transcribing video recordings is, however, notoriously time consuming, and a variety of single-user computer based tools have been developed to ease the task. This paper examines collaborative video analysis. The motivation for groupware tools for video analysis is described, and the desirable features of such tools are identified. The following section reviews related work on video analysis and on single-user video analysis tools. The review is used to derive a set of design goals for collaborative video analysis tools. We then detail prototype's user interface, its collaborative facilities, and its implementation. The preliminary evaluation is described prior the conclusions which identify directions for further work.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2011.11a
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• pp.694-696
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• 2011

The high enthalpy plasma research center in Chonbuk national university is under construction for four types of plasma equipments. The equipments are 1set of 0.4 MW class enhanced Huels type plasma equipment, 1 set of 2.4 MW class enhanced Huels type plasma quipment, 1 set of 60 kW RF plasma equipment and 1 set of 200 kW RF plasma equipment. 60kW RF plasma system is R&D and pilot scale production equipment of nano powder synthesis and plasma spray coating. 200kW RF plasma system is mass production equipment with high power capacity of nano powder synthesis. 0.4MW plasma system can be applied to the ground test facility for material testing under re-entry conditions for space vehicles.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10d
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• pp.473-476
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• 2007

최근 방송 통신 기술의 눈부신 발전에 힘입어 등장한 데이터 방송(Data Broadcasting)은 시청자에게 영상과 음성환 아니라 기존에는 접할 수 없었던 다양한 서비스들을 제공하고 있다. 이런 데이터 방송을 수신하기 위해서는 TS로부터 데이터를 추출하고 처리할 수 있는 미들웨어(middleware)가 포함된 셋탑박스(set-top box)가 필요하다. 그리하여 MHP, OCAP, ACAP 등 여러 데이터 방송 시스템의 미들웨어 표준 규격이 정의되었다. 그 중 MHP의 경우, OpenMHP라는 오픈 소스 프로젝트를 통해 PC 상에서 간단하게나마 MHP API를 테스트 해 볼 수 있는 환경을 제공해 주고 있다.[1] 하지만 셋탑박스 내에서 하드웨어를 이용하는 작업들은 거의 구현되지 못 했기 때문에 테스트에 있어 극히 제한적일 수밖에 없었다. 따라서 본 논문에서는 소프트웨어적으로 셋탑박스 환경을 에뮬레이션 해주는 Virtual Set-Top Box(VSTB)를 설계, 구현하였다. 셋탑박스가 없는 환경이나 간단한 시뮬레이션이 필요한 경우, 실시간 스트림 역다중화와, 파싱, 필터링 작업등이 지원되는 가상 셋탑박스 시스템을 통해 MHP 미들웨어 API를 테스트하는데 유용한 역할을 할 수 있을 것이다.