• 한국통신학회논문지
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• 제31권9C호
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• pp.882-888
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• 2006

다중사용자 검출(multiuser detection)은 기존의 정합필터 방식에 비해 CDMA 시스템의 용량을 크게 증가시키고, 서비스 품질을 향상시킬 수 있는 기술이다. 본 논문에서는 gradient search(GS)에 기초하여 ML(maximu likelihood) metric을 간단히 계산할 수 있는 방법을 소개한다. ML 검출을 위해서는 사용자 확산부호 뿐만 아니라 전력도 알아야한다. 사용자 전력이 알려져 있지 않은 경우, 전력과 데이터를 동시에 추정하는 방법을 제시하였다. 제시한 방법으로 정확히 전력을 알고 데이터를 검출하는 GS 방식과 거의 동일한 성능을 얻을 수 있음을 컴퓨터 시뮬레이견 결과는 보여준다.

• Journal of the Korean Statistical Society
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• 제34권2호
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• pp.85-98
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• 2005

A Bayesian analysis for the product of different powers of k independent Poisson rates, written ${\theta}$, is developed. This is done by considering a prior for ${\theta}$ that satisfies the differential equation due to Tibshirani and induces a proper posterior distribution. The Gibbs sampling procedure utilizing the rejection method is suggested for the posterior inference of ${\theta}$. The procedure is straightforward to specify distributionally and to implement computationally, with output readily adapted for required inference summaries. A salient feature of the procedure is that it provides a unified method for inferencing ${\theta}$ with any type of powers, and hence it solves all the existing problems (in inferencing ${\theta}$) simultaneously in a completely satisfactory way, at least within the Bayesian framework. In two examples, practical applications of the procedure is described.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2002년도 학술대회지
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• pp.411-414
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• 2002

The CHFG(Critical Heat Flux in Cap) test results have been evaluated to quantify the critical powers in hemispherical narrow gaps and Park's correlation has been verified. For verification of the Park's correlation, the critical powers in hemispherical narrow gaps have been measured using water at a pressure of 0.1-0.3 WPa for the hemispherical gap thickness of 1.0mm, and the heated top diameter of 238mm The measured critical powers were compared with Park's and Monde's correlation. As a results, the Park's correlation was most accurate of other correlations, however, estimated the critical powers somewhat larger than measured ones. So, it was suggested that the diameter factor in Park's correlation should be revised.

• 한국철도학회논문집
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• 제7권2호
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• pp.93-98
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• 2004

For the reduction and efficient management of railway noise, first of all prediction of railway noise is necessarily requisted. At home and abroad many studies for prediction of railway nearby noise have been accomplished. But it is impossible to predict exactly for the Korean Railway, because the acoustic powers for each rolling stock used in Korea have not been built yet. So in this study, acoustic powers for each Korean rolling stock such as Samaeul, Mugungwha were builded acceding to the speed and rail support systems. Predicted results using the acoustic powers suggested in this study are compared with measured results and it is known that these acoustic powers can be used for precise prediction of railway noise.

• Journal of Power Electronics
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• 제2권1호
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• pp.32-45
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• 2002

This paper proposes an unified definition of powers for various circuit conditions such as balanced/unbalanced, sinusoidal/non-sinusoidal, and linear/nonlinear, fur single-phase systems and three-phase systems. Conventional reactive power is more classified into an interactive power and an alternating power. These powers are defined both in the time domain and the frequency domain consistently, and agree well with the conservation law. Several important power quality factors are defined to measure and evaluate the power quality fur the various circuits in the single-phase and three-phase systems. Simulation results show the power quality factors can evaluate and classify the various circuit conditions clearly.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.231-231
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• 2017

• 수산해양교육연구
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• 제20권3호
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• pp.369-380
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• 2008

The government has promoted the local fishing port construction project since 1972 for conquest of the crisis of the fishing village by withering of a fishery, the improvement in fishermen's living environment and quality of life, and promotion of fisheries. In order to estimate the local fishing port construction project objective and synthetically, and to grope for the method proposal of system establishment of the project, the monitoring survey was carried out. The monitoring survey was classified into the program and the performance monitoring. The program monitoring was carried out in order to investigate the project fit for the inhabitants of a fishing village. The performance monitoring was carried out in order to investigate the development latent powers, fishery latent powers, tourism latent powers of a fishing village, rural settlement conditions, etc. using various statistical materials. Since investigating the measured value before executing a policy was not completed, the project effect was compared with the measured value of other areas. According to the local fishing port construction project, the development latent powers, fishery latent powers, and tourism latent powers of the fishing village where the project was undertaken improved greatly, and income of the fishing village increased greatly. As a result of comparing project fit in order to evaluate the project, the project fit of the local fishing port construction project area was higher than the non-project area. Desirable method proposal of monitoring survey was established and the method for raising the efficiency of monitoring survey was extracted.

• Journal of the Korean Data and Information Science Society
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• 제23권4호
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• pp.683-691
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• 2012

$4{\times}4$ 그레코라틴방격모형은 모집단의 분포에 상관없이 주효과 검정을 위한 순위변환 통계량의 검정력이 모수적 통계량의 검정력보다 전체적으로 높은 우위성을 갖는다. 효과크기가 균등간격이 아닌 경우에 주효과 검정을 위한 순위변환 통계량의 검정력은 효과크기가 균등간격인 경우보다 다소 낮지만 모수적 통계량의 검정력에 비하여 월등한 비교우위를 갖는다. 순위변환 통계량의 검정력은 블럭효과의 수가 줄어들거나 효과크기가 작아질수록 모수적 통계량의 검정력보다 월등히 우세함을 보인다. 블럭효과들이 존재할 때는 주효과에 비하여 블럭효과들이 모두 작거나 하나의 블럭효과에 편중된 경우에 순위변화 통계량의 검정력이 모수적 통계량의 검정력보다 더욱 우수하다. 이는 상호작용없이 다인자인 네 개의 주인자 및 블럭인자만으로 구성된 그레코라틴방격모형의 특성에 의한 결과로, 앞으로 구체화하지 못한 다인자로 구성된 요인실험계획모형 등에 확대 적용할 순위변환기법의 가능성을 제시한다.

• 분석과 대안
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• 제3권1호
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• pp.29-61
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• 2019

Within the discipline of International Relations (IR), the literatures on global governance (GG) and great power management (GPM) at best ignore each other, and at worst treat the other as a rival or enemy. On the one hand, the GPM literature, like both realism in all its forms, and neoliberalism, takes for granted the ongoing, disproportionate influence of the great powers in the management of the international system/society, and does not look much beyond that. On the other hand, the GG literature emphasizes the roles of smaller states, non-state actors and intergovernmental organizations (IGOs), and tends to see great powers more as part of the problem than as part of the solution. This paper argues that the rise to prominence of a non-traditional security agenda, and particularly of human security, has triggered a de facto merger of GPM and GG that the IR literature usually treated as separate and often opposed theories. We use the Ebola crisis of 2014-15 to show how an issue framed as human security brought about a multi-actor response that combined the key elements of GPM and GG. The security framing overrode many of the usual inhibitions between great powers and non-state actors in humanitarian crises, including even the involvement of great power military forces. Through examining broadly the way in which the Ebola crisis is tackled, we argue that in an age of growing human security challenges, GPM and GG are necessarily and fruitfully merging. The role of great powers in this new human security environment is moving away from the simple means and ends of traditional GPM. Now, great powers require the ability to cooperate and coordinate with multiple-level actors to make the GG/GPM nexus more effective and sustainable. In doing so they can both provide crucial resources quickly, and earn respect and status as responsible great powers. IGOs provide legitimation and coordination to the GPM/GG package, and non-state actors (NSAs) provide information, specialist knowledge and personnel, and links into public engagement. In this way, the unique features of the Ebola crisis provide a model for how the merger of GPM and GG might be taken forward on other shared-fate threats facing global international society.

• 국제지역연구
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• 제14권3호
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• pp.421-440
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• 2010

이 글은 탈냉전 시기 강대국과 구별되는 중견국가의 공적개발원조 정책에 대해 살펴보고 이에 따른 한국의 원조전략을 연구한다. 성공적인 공적개발원조는 공여국의 위상을 높이고 수원국의 발전을 돕는다는 점에서 중견국가의 원조정책은 강대국보다 효과적이다. 중견국가는 외교력과 다자주의적 접근을 통해 국제문제를 해결하며 빈곤 퇴치와 인권 증진의 목표 하에 공적개발원조의 규모, 대상, 방식, 부문, 체계를 결정한다. 따라서 중견국가는 강대국보다 많은 양의 GNI 대비 원조를 제공하고 자국의 안보 전략적, 경제적 이익과 무관한 최빈국을 우선 원조 대상국으로 삼고 있다. 또한 원조의 조달처나 용도를 제한하지 않는 양자 간 비구속성 무상원조 방식을 많이 택하고 있고 식량 원조, 재난 구호, 환경 보호 부문에 원조를 집중하고 있다. 반면 자국의 이익에 따라 공적개발원조 정책을 결정하는 강대국의 원조는 수원국의 필요와 맞지 않는 경우가 많다. 한편 신흥 중견국가 한국의 공적개발원조 정책은 첫째, 공여국의 위상 면에서 중견국가의 규범과 목적에 부합되지 않는 경우가 많았고 강대국 답습 혹은 편승 전략을 보여주었다. 특히 아시아 지역에 한정한 소액 분산 지원은 일본 대외원조의 경제적 이해와 직접적으로 충돌했고 국가 주도형 발전모델의 전수 전략 역시 미국 대외원조의 핵심인 즉각적인 민주화 프로그램과 충돌하면서 효과적이지 못했다. 둘째, 수원국의 발전 면에서 한국의 부문 별 원조정책은 경쟁력과 실효성을 보여주었다. 탈냉전 시기 강대국의 관심이 경제 기반시설과 생산 분야 원조에서 멀어지고 있는 상황에서 한국은 비교우위 분야인 정보통신과 산업 에너지에 대한 기술 지원 및 협력을 통해 수원국의 기반시설 구축에 도움을 주었다. 특히 중견국가의 전통적 원조부문인 인도적 지원이 아닌 분야에 원조를 집중한 것은 제한된 규모를 바탕으로 중견국가군 사이에서 틈새를 공략한 성공적인 사례이다.