• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.5
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• pp.1077-1083
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• 2015

In this paper, we introduce an energy-efficient opportunistic interference alignment (OIA) scheme that greatly improves the sum-rates in multi-cell uplink networks. Each user employs optimal transmit vector design and power control in the sense of minimizing the amount of generated interference to other-cell base stations while satisfying a required signal quality. As our main result, it is shown that owing to the reduced interference level, the proposed OIA schemes attains larger sum-rates than those of OIA with no power control for almost all signal-to-noise ratio regions. In addition, when both zero-forcing and minimum mean square error (MMSE) detectors are employed at the receiver along with the OIA scheme, it is shown that the OIA scheme with MMSE detection shows superior performance.

• The Journal of the Korea Contents Association
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• v.22 no.9
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• pp.401-411
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• 2022

This study tests a model for the effect of low self-control on cyber crime and its mediating process. Intervening variables include smartphone addiction, social learning and opportunity variables. Analyzing a data from college students in Seoul, it is shown that the effect of low self-control has a significant effect on smartphone addiction. Results also show that smartphone addiction has a positive significant effect on differential association with illegal peers, illegal definition, and illegal opportunity, and in turn cybercrime. In addition, it is found that low self-control has also a direct effect on differential association with illegal peers, illegal definitions, and illegal opportunity without mediating by smartphone addiction. As a result, it is reveal that the effect of low self-control on cybercrime is indirect and its effect is mediated by smartphone addiction, differential association with illegal peers, illegal definitions, and illegal opportunity.

• Management & Information Systems Review
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• v.28 no.4
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• pp.67-92
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• 2009

We examine the effects of investment opportunities, external financing, and cost of debts on the firms' capital investments. The empirical findings indicate that : (1) the firms' investment opportunities positively stimulates corporate capital investments but the effects of investment opportunities on the firms' capital investments decrease as the external financing and cost of debts increase ; (2) the firms' investment opportunities are positively correlated with firms' capital investments but the effects of external financing on the firms' capital investments decrease as cost of debts increase; (3) cost of debts is negatively associated with firms' capital investments and especially in the KOSPI firms, the effects of investment opportunities on the firms' capital investments decrease as cost of debts increase. Our findings suggest that managers' views be different from the policy maker's view and the more firms' internal factors of capital investments be found in the future.

• Proceedings of the Korean DIstribution Association Conference
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• 2007.08a
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• pp.159-186
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• 2007

In today's world, the ability to adapt to the rapidly changing environment is fundamental to the survival and success of any organizations. This is particularly true for the Korean retailing industry which is in the throe of sweeping developments. Against the backdrop of an increasing importance of the environmental factors, it is imperative to look into what efforts are required of corporate enterprises in order to achieve successful long-term partnerships between and among the parties involved in the retail value chain. In spite of the critical importance of the need to understand the environmental factors and their influences on the retail value chain, a serious theoretical and empirical study into this subject has never been conducted. Moreover, previous research has overlooked the various mechanisms influencing the value chain in terms of ,control strategy' and 'control structure'. The purpose of this study is to investigate the direct and indirect modes of influences environmental dynamism exerts on opportunism, one of important relationship factors. This study particularly delves into the indirect modes of influence in terms of control strategy (control mechanism) and control structure (bureaucratic structuring). To this end, a survey research has been conducted of 200 suppliers in business relationships with Korean hypermarket retailers. The survey results show that environmental dynamism has a positive correlation with the opportunism of suppliers. In addition, the control mechanisms such as monitoring and incentives employed by retailers, in turn, have an indirect influence on the opportunism of suppliers. In other words, the monitoring of retailers has a positive correlation with the opportunism of suppliers, while the use of bureaucratic structuring has a negative correlation with opportunism. This study discusses how both retailers and their suppliers should respond to the domestic retail business environment with highly dynamic characteristics, in order to achieve a long-term win-win partnership with one another. It also presents ideas to retailers with regard to what kinds of management strategies and management efforts required to effectively control the opportunism of suppliers.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.10 no.4
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• pp.1-12
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• 2015

Among leadership competence essential for start-up C.E.O, this study was to analyze the effect of self-leadership on recognition of opportunity on establishment of company and will of establishing company through the mediated effect of entrepreneurship. Under the atmosphere of encouraging the establishment of company led by the government, within the college curriculum, along with various education and events, the education about entrepreneurship is actively provided, and in academic fields, studies about entrepreneurship, recognition of opportunity on establishment of company, and will of establishing company are actively performed, while there is almost no study about correlation among self-leadership, recognition of opportunity on establishment of company and will of establishing company. Therefore, in this study, 320 questionnaires filled out by college students from four colleges in Seoul were verified and analyzed. As a result of analysis, at first, the self-leadership showed partially significant effect on entrepreneurship. Second, entrepreneurship showed partially significant effect on recognition of opportunity on establishment of company and will of establishing company. Third, the self-leadership showed partially significant effect on recognition of opportunity on establishment of company and will of establishing company. Fourth, regarded as the core of this study, in between self-leadership and recognition of opportunity on establishment of company, and in between self-leadership and will of establishing company, the mediate effect of entrepreneurship was shown. According to such outcome of study, in the curriculum design of college venture education to increase recognition of opportunity on establishment of company and will of establishing company, the education of entrepreneurship and active trial of self-leadership education are essential.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.16 no.2
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• pp.123-141
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• 2021

This research examined the relationship between entrepreneurial attitude and entrepreneurial opportunity recognition and university students' entrepreneurial potential in the entrepreneurship of university students. Accordingly, this research confirmed the significant influence between the awareness formation of entrepreneurial opportunities and the attitude toward entrepreneurial, which affect the improvement of the entrepreneurial potential of university students, and analyzed the influence relationship between the variables according to the start-up education and the role model. The results of the study are summarized as follows. First, creativity, leadership, and individual control have a significant effect on information search. Insight and achievement have no statistically significant effect on information search. Second, creativity, leadership, and insight were found to have a significant effect on the information combination, and the sense of achievement and individual control did not significantly affect the information combination statistically. Third, creativity, leadership, and individual control have a significant effect on opportunity capture. Insight and achievement have no statistically significant effect on opportunity capture. Fourth, information seeking and opportunity capture have a significant effect on perceived entrepreneurship prospects, and information combination has no significant effect on statistically recognized entrepreneurship prospects. This research examined the effects of the entrepreneurship education and role model of university students, which are the subjects of entrepreneurship education activities supported by universities and governments, and suggested implications related to the entrepreneurial potential of university students who did not entrepreneurship immediately because the perceived desire for and the perceived feasibility of entrepreneurship are formed.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2017.11a
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• pp.969-988
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• 2017

4차 산업혁명에 대한 국가적 관심이 높아짐에 따라 ICT산업 분야의 연구개발(R&D)는 앞으로의 국가 성장에 핵심적인 역할을 할 가능성이 크다. 우리나라의 경우도 빠르게 변화하는 ICT 산업에 대응하기 위해, 국가차원에서는 중장기 전략을 수립하고 있으며, 민간차원에서는 관련 인력풀(pool)을 늘리는 등 다각화된 대처를 하고 있다. 하지만 미국과 중국 등 선진국들의 기술수준과 가격 경쟁력을 결코 무시할 수 없어, 우리나라의 ICT산업은 낙관할 수만은 없는 상황이다. 그러므로 지금은 오히려 우리나라 ICT산업에 대한 명확한 진단을 통해 효율적이고 효과적으로 기술기회와 R&D기회를 발굴하는 것이 보다 실효성 있는 정책 수립에 도움을 줄 수 있다. 본 논문에서는 한국과학기술정보연구원(KISTI)에서 개발한 교역활동 프로파일 분석 시스템을 통해 ICT산업에 관련된 상품들 전체를 거시적인 관점에서 확인함으로써 우리나라의 ICT산업 전반을 진단하고 분석하고자 한다. 이로 인해, 증거기반(evidence-based)의 과학적인 방법으로 연구개발 기회를 파악하여 효율적이고 효과적인 정책수립에 기여하고자 한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.34 no.3A
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• pp.244-257
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• 2009

We analysed the opportunistic scheduling method in MMR proposed by Samsung Electronic Cooperation and confirmed the efficiency by simulation. We also investigated the relationship between the throughput and fairness under the proposed method. The main objective of this study is to propose an opportunistic packet scheduling method in MMR, which considers the QoS requirement of user. Using the simulation the performance of the proposed method is compared with those of i) pure opportunistic packet scheduling method which doesn't consider QoS requirement and ii) packet scheduling method which only consider the QoS requirement, but does not utilize opportunistic packet scheduling.

• 한국벤처창업학회:학술대회논문집
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• 2020.06a
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• pp.95-100
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• 2020

본 연구는 과학기술의 발전과 이에 따른 급속한 사회변화 속에서 청소년의 진로를 탐색하고 역량을 높이기 위해 운영되고 있는 기업가정신 교육의 효과성을 밝히는데 목적이 있다. 청소년기는 미래인재로서 진로탐색을 위해 다양한 시도를 해야 할 필요성이 있는 시기이므로 청소년들에게 다양한 기회를 발견하고 활용하여 문제 상황을 해결해보는 경험이 필요하다할 수 있다. 기업가정신의 구성요인은 일반적으로 위험감수성, 진취성, 혁신성을 포함한다. 위험감수성은 불확실한 결과가 예상됨에도 과감히 도전하려는 의지이고, 진취성은 새로운 기회를 선제적 및 적극적으로 포착하기 위한 노력이며, 혁신성이 새로운 변화와 혁신을 선호하고 추구하면서 문제를 해결하려는 노력이라는 점에서 기회와 창의성, 문제해결력이 기업가정신에 중요한 요인에 포함됨을 판단할 수 있다. 청소년 기업가정신 교육의 효과성 측정항목으로 기업가적 태도와 진로개발역량으로 정하고, 기업가적 태도 하위항목으로 기회발견과 창의성 역량을, 창의성 역량의 세부지표로 창의적 문제해결능력, 협력적 의사소통능력, 혁신적 업무행동능력 선정하였다. 진로개발역량의 하위항목으로 진로설계, 개척정신을 정하였으며 진로설계의 세부지표로 자기탐색, 직업탐색, 직업가치관, 진로태도를, 개척정신의 세부지표로 차별화태도, 도전정신을 선정하였다. 이의 측정을 위해 청소년 기업가정신 교육 프로그램을 경기도 소재 중학교 학생들을 대상으로 2020년 9월부터 10월까지 실시하였다. 본 연구결과로 기업가정신 함양 프로그램을 수강한 학생들이 교육을 통하여 어떠한 역량이 높아졌는지에 대한 검증이 가능할 것으로 사료된다. 또한 이러한 효과측정을 통하여 더 나은 교육프로그램을 개발할 수 있는 계기의 마련과 기업가정신 교육에 대한 이해의 폭을 넓혀 기업가정신 교육의 활성화를 기대할 수 있을 것이다.

• Journal of Korea Society of Industrial Information Systems
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• v.2 no.2
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• pp.41-64
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• 1997

새로운 개념은 늘 기회와 위기라는 양면성을 띠고 있다. 최근에 등장한 인트라넷도 기존의 클라이언트/서버 개념을 대체할 것으로 인정되고 있기는 하지만, 그 개념의 정립조차도 확실하지 않은 지금의 상태에서는 인트라넷이 어떤 기업에게 기회로 작용하기 보다는 위기로 작용할 가능성이 크다고 볼수 있다. 인트라넷을 새로운 사업이나 조직혁신의 기회로 삼기 위해서는 인트라넷에 대한 구축담당자의 분명한 이해와 사전 고려사항들에 대한 숙지가 필수적이라고 할 수 있다. 본 고는 이러한 차원에서 인트라넷에 대한 정의를 분명히 하고, 그 사례와 구축방법론을 살펴본후 , 사전 고려사항에 대해서 논하고자 한다.