• 한국IT서비스학회:학술대회논문집
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• 2007.05a
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• pp.86-91
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• 2007

유무선 대체 및 경쟁관계는 통신시장 규제정책의 관점에서 매우 중요한 시사점을 가진다. 이제까지 유선전화시장에서는 기존 지배적 유선전화 사업자의 각종 활동을 규제해 기존사업자와 신규사업자간의 공정경쟁을 확보해 왔으나, 유무선 통신시장의 역전현상과 함께 유무선 대체 및 경쟁관계가 진행되면서, 유무선간 비대칭규제는 그 유용성을 점차 상실하고 있다. 그에 따라 음성전화 부문의 새로운 시장획정 및 지배력 평가와 규제접근법의 정립이 필요하게 되었다. 이에 본 연구에서는 유무선 대체 현황 분석 및 전망, 우리나라의 불균형한 유무선 규제제도에 대해 알아보고자 한다.

• Management & Information Systems Review
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• v.33 no.1
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• pp.139-155
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• 2014

This study is to examine the linkage of volatility between changes in the stock market of India and other countries through the integration of the world economy. The results were as follows: First, autocorrelation or serial correlation did not exist in the classic RS model, but long-term memory was present in the modified RS model. Second, unit root did not exist in the unit root test for all periods, and the series were a stable explanatory power and a long-term memory with the normal conditions in the ARFIMA model. Third, in the multivariate asymmetric BEKK and VAR model before the financial crisis, it showed that there was a strong influence of the own market of Taiwan and UK in the conditional mean equation, and a strong spillover effect from Japan to India, from Taiwan to China(Korea, US), from US(Japan) to UK in one direction. In the conditional variance equation, GARCH showed a strong spillover effect that indicated the same direction as the result of ARCH coefficient of the market itself. Asymmetric effects in three home markets and between markets existed. Fourth, after the financial crisis, in the conditional mean equation, only the domestic market in Taiwan showed strong influences, and strong spillover effects existed from India to US, from Taiwan to Japan, from Korea to Germany in one direction. In the conditional variance equation, strong spillover effects were the same as the result of the pre-crisis and asymmetric effect in the domestic market in UK was present, and one-way asymmetric effect existed in Germany from Taiwan. Therefore, the results of this study presented the linkage between the volatilities of the stock market of India and other countries through the integration of the world economy, observing and confirming the asymmetric reactions and return(volatility) spillover effects between the stock market of India and other countries.

• International Area Studies Review
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• v.12 no.3
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• pp.49-67
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• 2008

In this paper, we address the problem of optimal monetary policy rule in the presence of abrupt shifts in the structure of the economy. To do so, we first estimate a Markov switching model for the US housing price inflation, and find evidence supporting the presence of two distinct regimes for the US housing price inflation. One of the two regimes identified appears 'usual', in that housing price inflation negatively responds to higher real interest rate. The other regime is 'unusual', in that the housing price inflation is positively related with real interest rate. We then solve an optimal control problem of the FRB under the presence of the two regimes thus identified. The optimal policy is 'asymmetric' in that the optimal responses in the 'usual' regime require the FRB to lean against the wind to inflationary pressure, while the FRB is recommended to accommodate it in the unusual regime. It is also found that the optimal degree of responses is more conservative when the FRB acknowledges the uncertainty about future regime.

• Proceedings of the Korean Vacuum Society Conference
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• 2014.02a
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• pp.446-446
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• 2014

흑연(graphite)과 티타늄(titanum; Ti) 타겟이 양쪽에 부착되어 있는 비대칭 마그네트론 스퍼터링 장치를 이용하여 Ti이 도핑되어진 다이아몬드상 탄소박막(Ti doped Diamond-like carbon, DLC:Ti)을 증착하였다. 흑연과 티타늄 타겟의 파워는 고정하고 기판에 음의 DC 바이어스를 인가하여 DC 바이어스 변화에 따른 DLC:Ti 박막을 증착하였다. 증착되어진 박막의 음의 DC 바이어스의 변화에 따라 변화되어지는 경도와 마찰계수, 표면의 거칠기, 접촉각 등의 물리적 특성들을 분석하였으며, XPS와 라만등의 분석법을 이용하여 박막의 구조적 특성을 분석하였으며, 패시베이션 층을 위한 전기적 특성등을 평가하여 이들 특성들간에 관계를 고찰하였다.

• Knowledge Management Research
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• v.22 no.2
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• pp.55-76
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• 2021

The real estate market is a representative imperfectly competitive market. Real estate information is characterized by being collected and utilized in a closed environment, and market participants have to pay a lot of time, effort, and costs to acquire such information. Korea's real estate public data is increasing year by year, but it is scattered by relevant ministries. So it is difficult to search and analyze, and the level of development of the industry using it is low. In the recent 4th industrial revolution, the proptech industry has developed as an industry to efficiently provide necessary information to the real estate market. In this study, based on the case of major companies in the real estate platform field among proptech companies, we looked at the types of information provided to users, and on the contrary, explored ways to utilize the data collected from users. The results of this study are expected to provide theoretical and practical implications for ways to reduce information asymmetry in the real estate market and contribute to the development of the real estate industry.

• KDI Journal of Economic Policy
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• v.31 no.2
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• pp.1-13
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• 2009

The monetary model suggests that nominal exchange rates between two countries will be determined by important macroeconomic variables. The existence of a cointegrating relationship among these fundamental variables is the backbone of the monetary model. In a recent paper, Rapach and Wohar (2002, Journal of International Economics) advance the literature by testing for linear cointegration in the monetary model using a century of data to increase power. They find evidence of cointegration in five or six of ten countries. We extend their work to the nonlinear framework by performing threshold cointegration tests that allow for asymmetric adjustments in two regimes. Asymmetric adjustments in exchange rates can occur, for example, if transactions costs are present or if policy makers react asymmetrically to changing fundamentals. Moreover, whereas Rapach and Wohar (2002) found it necessary to exclude the relative output variable in some cases to maintain the validity of their cointegration tests, we can include this variable as a stationary covariate to increase power. Overall, using their same long-span data, we find more support for cointegration in a nonlinear framework.

• Journal of the Korean Vacuum Society
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• v.16 no.2
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• pp.122-127
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• 2007

In this research, amophous carbon films (a-C, a-C:H, a-C:N) were synthesized by closed-field unbalanced magnetron (CFUBM) sputtering using graphite target. We also fabricated amorphous carbon films with applying negative DC bias voltage of 200 V in during the deposition in working pressure. Also, a-C:H and a-C:N films was synthesized by adding acethylene($C_{2}H_{2}$) and nitrogen(N) gases of 4 and 3 sccm into Ar pressure. The a-C:H film synthesized at -200 V exhibited the maxumum hardness of 26.3 GPa, the smooth surface of 0.1 nm and the good adhesion of 30.5 N. And a-C:N film synthesized at -200 V exhibited at -200 V exhibited the best adhesion of 32 N. This paper examined the effect of $C_{2}H_{2}$ gas, $N_{2}$ gas and negative DC bias voltage as the parameter for improving the physical properties and the relation between structral and physical properties of carbon films.

• Journal of Korean Philosophical Society
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• v.139
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• pp.23-45
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• 2016

This paper analyzes Paul Ricoeur's theory of mutual recognition with the concern for the establishment of a desirable relationship between cultures. Ricoeur tries to construct his own theory via Hegel and Honneth. He thinks, according to their theory, the state of being recognized could not arrive eternally. This means that the struggle for recognition could continue permanently. To put an end to the struggle for recognition, Ricoeur introduces the state of peace made possible by the exchange of ceremonial gifts. In other words, the struggle could be eliminated symbolically thorough the exchange of gifts. The mutuality established by this process however, can not accomplish its meaning without overcoming the original dissymmetry between one and the other in which phenomenology has a keen interest. To integrate the dissymmetry into mutuality, Ricoeur gives attention to 'between' the giver and the receiver in the system of gift exchange. He carries out this task by securing a just distance, or a distance in proximity.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.67-69
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• 2005

현재까지의 보안 라우팅 프로토콜은 유무선에 관계 없이 페이로드 부분은 암호화가 되더라도 패킷 헤더의 내용이 평문 형태로 무방비하게 노출되며 라우팅 경로가 안전하게 보장되더라도 악의적인 노드에게 경로가 알려지는 것을 차단 할 수 없다. 또한 유선 환경과는 달리 Ad-hoc 네트워크와 같은 무선 상황에서는 전파의 전방향성 때문에 송수신 범위 내에 있는 노드들이 평문 형태의 라우팅 정보 및 송수신 노드의 정보를 수집하는 것을 방지 할 수 없다. 본 논문에서 제안하는 은닉 라우팅 프로토콜은 한쌍의 노드가 비대칭키 암호화 알고리즘을 통해 공유한 초증가 수열을 통해 송수신 노드를 은닉하면서도 정당한 수신 노드만 자신이 수신 노드임을 알 수 있는 기법을 제공함으로서 악의적인 노드가 라우팅 경로에 대한 정보를 수집하는 것을 원천적으로 차단한다.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.19 no.2
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• pp.159-179
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• 2024

Based on the case of collaboration between large companies and startups, this study suggests the importance of establishing mutual cooperation and trust relationships for the success of open innovation strategy from the perspective of cooperative game theory. It also provides implications for how this can be implemented. Due to information asymmetry and differences in organizational culture and decision-making structures between large companies and startups, collaboration is likely to proceed in the form of non-cooperative games among players in general open innovation, leading to the paradox of open innovation, which lowers the degree of innovation. Accordingly, this study conducted a case study on collaboration between large company 'G' and startup 'S' based on the research question "How did we successfully promote open innovation through cooperative game-type collaboration?" The study found that successful open innovation requires (1) setting clear collaboration goals to solve the organizational problem between large companies and startups, (2) supporting human resources for qualitative growth of startups to solve reliability problems, (3) leading to strategic investment and joint promotion of new projects to solve the profit distribution problem. This study is significant in that it contributes to expanding the discussion of the success factors of open innovation to the importance of interaction and strategic judgment considering the organizational culture and decision-making structure among players, and empirically confirming the success conditions of open innovation from the perspective of cooperative game theory.