• ETRI Journal
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• 제28권6호
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• pp.811-814
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• 2006

In this letter, we introduce confusion-based confidence measures for detecting an impostor in speaker recognition, which does not require an alternative hypothesis. Most traditional speaker verification methods are based on a hypothesis test, and their performance depends on the robustness of an alternative hypothesis. Compared with the conventional Gaussian mixture model-universal background model (GMM-UBM) scheme, our confusion-based measures show better performance in noise-corrupted speech. The additional computational requirements for our methods are negligible when used to detect or reject impostors.

• Asia pacific journal of information systems
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• 제11권3호
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• pp.43-62
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• 2001

The purpose of this research is to develop a webcasting site evaluation model, to estimate the relative importance of factors affecting the performance of webcasting sites, and to derive the CSFs of the sites. Evaluation model consists of 6 first-level evaluation factors and 23 second-level evaluation factors. This study compares the evaluation scores of website with those of the customer satisfaction. We inspect seven hypotheses. Hypothesis)(H1) tests correlation of the evaluation scores of website and those of the customer satisfaction. Hypothesis2(H2)$\sim$Hypothesis7(H7) tests if 6 first-level factors(planning, program & form, design, technology, interface, content) have an impact on customer satisfaction. In order to test the hypotheses, correlation analysis and regression analysis are performed. As a result of empirical tests, all Hypotheses$(H1){\sim}H7)$ are accepted and its implications are discussed.

• 자원ㆍ환경경제연구
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• 제11권1호
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• pp.121-144
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• 2002

The purpose of this study is to test pollution-heaven hypothesis on the korean pollution-intensive industries, that is, textile and clothing, petrochemical and primary metal industry. The empirical study examines that foreign direct investment(FDI) of korean pollution-intensive industries regresses on couple of exogenous variables and the environmental regulation on FDI. As the environmental regulation is not directly observed, it uses $CO_2$ emissions as the pollutant. The results of the study show that the environmental regulation in a host country is an insignificant determinant of FDI for the korean polluting industries. That is, they do not support Leonard (1988), Xing and Kolstad (2000) that the hypothesis is a significant for heavily polluting industries.

• 대한전기학회논문지
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• 제45권1호
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• pp.139-145
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• 1996

The input estimation method estimates maneuvering input acceleration in order to track a maneuvering target. In this paper, the optimal input estimator is derived by choosing the MAP hypothesis among maneuvering input transition hypotheses under the assumption that a maneuvering input acceleration is a semi-Markov process. The optimal input estimation method cannot be realized because the optimal filter should consider every maneuver onset time hypothesis from filter starting time to current time which increase rapidly. Hence the suboptimal filter using a sliding window is proposed. Since the proposed method can consider all hypotheses of input transitions inside the window, it is general enough to include Bogler's input estimation method. Simulation results show, however, that we can obtain a good performance even when the filter considering just one input transition in the window is used. (author). 9 refs., 3 figs., 1 tab.

• 산업융합연구
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• 제2권1호
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• pp.23-46
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• 2004

Tax exhaustion effect hypothesis says that firms with low expected marginal tax rates on their interest deductions employ less debt in their capital structure. We use logit analysis to study how financing decision is related to tax after controlling non tax effects. We treat non debt tax shields as proxy of marginal corporate tax rates which affect the probability of using the deductibility of debt tax shields and empirically test the tax effect on financing decision in Korea. In conclusion, we provide evidence that debt financing is positively related to tax in the former sub-period. This results partially support for tax exhaustion effect hypothesis and low tax rate firms have lower debt levels than high tax rate firms.

• Journal of Acupuncture Research
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• 제36권2호
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• pp.88-91
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• 2019

Background: The intelligent tissue hypothesis on how acupuncture works, states that real-time organ states are reflected in the tissue at an organ's related acupuncture points (acupoints). Any such changes in the tissue would produce corresponding changes in the impedance at those locations. Methods: To test this hypothesis in relation to the lungs, the impedance at key lung-related acupoints was monitored in real time while the patient breathed normally, then breathed deeply, then quickly, then held his breath. Results: When breathing deeply this produced a notable decrease in the impedance at 1 acupoint, while breathing quickly produced a decrease at another acupoint, suggesting that these different functions taxed different aspects of the lungs, which was then reflected at different acupoints. The impedance at all the acupoints also contained low-amplitude waves that reflected the base rate of the respiration pacesetter, and the amplitude of these waves also varied to reflect different real-time states in the lungs. Conclusion: These real-time impedance patterns suggested that corresponding physical patterns were present in the tissue at these acupoints, and these physical patterns mirrored the real-time variations in function strength of the related organ (the lungs). These results were consistent with the hypothesis.

• Journal of the Korean Data and Information Science Society
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• 제20권1호
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• pp.237-250
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• 2009

We consider a nonparametric test procedure for the multi-sample problem with grouped data. We construct the test statistics based on the scores obtained from the likelihood ratio principle and derive the limiting distribution under the null hypothesis. Also we illustrate our procedure with an example and obtain the asymptotic properties under the Pitman translation alternatives. Also we discuss some concluding remarks. Finally we derive the covariance between components in the Appendix.

• 한국국방경영분석학회지
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• 제27권2호
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• pp.124-133
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• 2001

The purpose of this study is investigate the differences among parametric and nonparametric test statistics for the tree alternative hypothesis in the randomized block design. As the results, it was found that there was no large differences among parametric and nonparametric test statistics in power when the block sizes were larger, and Hollander's statistic had better power than other nonparametric test statistics. It is recommended that Hollander's test statistic is more useful method when we have no information about the distribution of population.

• 시큐리티연구
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• 제49호
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• pp.97-129
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• 2016

본 연구는 경호무도지도자의 리더십행동과 역할지각, 코칭자신감 간의 관계와 미치는 영향력에 대해 알아보고 특히, 리더십행동이 코칭자신감에 미치는 영향에 있어 역할지각의 매개효과를 중심으로 실증 조사, 분석하는데 목적을 둔 연구로써 현직 경호무도지도자 들을 대상으로 실증 조사를 통한 자료 수집을 통해 통계분석을 실시하였다. 전체적으로 연구 가설의 검증에 앞서 상관관계 분석을 실시한 결과, 모든 잠재 요인들 간에 유의미한 정(+)의 상관관계가 있는 것으로 나타났고(< p.01) 특히 코칭자신감 중 심리적 코칭자신감과 인간관계적, 심리적 코칭자신감, 운동지도, 운동처방, 봉사활동 간의 상관관계가 높게 나타났다. 구체적으로 다음과 같은 검증 결과를 확보하였다. 첫째, 가설 1에 대한 검증 결과, 리더십행동이 역할지각에 미치는 영향력은 유의한 것으로 나타났다. 따라서 리더십행동은 역할지각에 유의미한 정(+)의 영향을 미치는 것으로 나타나 가설 1은 지지되었다. 둘째, 가설 2에 대한 검증 결과, 역할지각이 코칭자신감에 미치는 영향력은 유의한 것으로 나타났다. 따라서 역할지각은 코칭자신감에 유의미한 정(+)의 영향을 미치는 것으로 나타나 가설 2는 지지되었다. 셋째, 가설 3에 대한 검증 결과, 리더십행동이 코칭자신감에 직접적으로 미치는 영향력은 유의한 것으로 나타났으며 리더십행동은 코칭자신감에 유의미한 정(+)의 영향을 미치는 것으로 나타나 가설 3은 지지되었다. 넷째, 최종적으로 리더십 행동이 코칭자신감에 미치는 총효과는 직접효과와 간접효과를 합한 역할지각의 간접효과와 직접효과가 모두 유의한 것으로 나타나 리더십행동이 코칭자신감에 미치는 영향에 있어 역할지각은 부분매개 효과를 갖는 것으로 확인 되어 연구가설이 지지되었다. 이러한 연구결과는 리더십행동을 통한 코칭자신감 함양에 있어서는 역할지각이 함께 병행되었을 때 그 효과가 극대화됨을 시사한 것으로 평가할 수 있다.

• 국제지역연구
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• 제17권4호
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• pp.67-88
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• 2013

본 연구의 목적은 1978-2012년의 자료를 이용하여 중국의 동부지역, 중부지역, 서부지역 그리고 동북지역을 대상으로 이들 지역이 성장함에 따라 나타나는 지역격차의 패턴을 분석하는 것이다. 이를 위하여 Williamson의 역U자형 가설과 Amos의 발전된 역U자형 가설을 검증하였다. 이를 통하여 지역이 역분극화 과정에 있는지 아니면 발전된 역분극화 과정에 있는지를 파악하였다. 연구결과를 보면 지역내 인당 절대적 경제격차모형에서는 동부지역, 중부지역, 서부지역과 지역간 모형 그리고 상대적 경제격차모형에서는 중부지역과 서부지역이 Williamson의 역U자형 가설이 지지되었다. 반면 지역간 모형과 서부지역은 Amos의 발전된 역U자형 가설이 지지되었다. 한편 도 농격차를 기준으로 한 모형에서는 절대적 경제격차의 지역간 모형과 상대적 경제격차의 중부지역은 Amos의 발전된 역U자형 가설이 지지되었고, 지역간 모형과 서부지역은 상대적 경제격차모형에서 Williamson의 역U자형 가설이 지지되어 이들 지역은 역분극화 과정이 진행되고 있음을 알 수 있다. 이 결과는 중국이 지역에 따라 역분극화 과정이 있는 지역도 있고 성장에 힘입어 공간적 재구조화가 진행되는 경우도 있음을 알 수 있다.