• 한국정보과학회논문지:소프트웨어및응용
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• 제34권12호
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• pp.1065-1074
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• 2007

기존의 참조서명과 입력서명을 비교하는 방법 중 분절 단위 비교 방법은 전역적 비교와 점 단위 비교 방법과 비교하여 우수한 장점을 가지고 있다. 그러나 분절 단위 비교 방법은 인식률과 직접적인 관계가 있는 분절의 불안정 문제점이 있다. 이러한 문제점을 해결하기 위하여 본 논문에서는 분절단위 방법 외에 선형판별분석에 의한 매칭방법을 고려한 서명 검증 기법을 제안한다. 최종 검증단계에서 두 개의 독립모델을 효과적으로 융합할 수 있는 확률기반의 베이지안 분류기를 적용하였다 다양한 서명데이타를 이용하여 실험한 결과 제안된 기법은 분절단위 기반 구간분할매칭 기법에 비해 우수한 성능을 나타냈다.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2019년도 제60차 하계학술대회논문집 27권2호
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• pp.401-402
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• 2019

The purpose of this study is to find specific service quality factors of enterprises that can maximize the perception of banks' services to users of commercial banks in China, and to establish empirically how these quality factors affect the bank's image. They also want to verify the impact of the positive image of the bank on the user's satisfaction and the willingness to use the bank's services. For empirical verification of this study, questionnaires will be used to customers who have used the services of each of the four commercial banks in China, and the survey was conducted. The collected data were analyzed using the SPSS using statistical techniques such as Cronbach' ${\alpha}$, Investigative Factor Analysis, Reliability Analysis, Correlation Analysis, Regression and Difference Verification. The results of the verification were summarized below. First, the quality of service of commercial banks has a partial positive effect on the bank's image. Second, the image of a commercial bank has a positive effect on customer satisfaction. Third, the image of a commercial bank has a positive effect on the purpose of use. Fourth, the image of commercial banks has a partial mediated effect between service quality and customer satisfaction. Fifth, the image of a commercial bank has a partial mediated effect between the quality of service and its intended use.

• International Journal of Computer Science & Network Security
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• 제24권9호
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• pp.202-206
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• 2024

Robust system may not guaranty its applicability and adaptability. That is why research and development go together in the modern research concept. In this paper we are going to examine the applicability and adaptability of gait-based biometric identity verification system especially in the GCC (Gulf Cooperation Council). The system itself closely involved with human interaction where privacy and personality are in concern. As of 1^st phase of our research we will establish gait-based identity verification system and then we will explain them in and out of human interaction with the system. With involved interaction we will conduct an extensive survey to find out both applicability and adoptability of the system. To conduct our experiment, we will use UCMG databased [1] which is readily available for the research community with more than three thousand video sequences in different viewpoint collected in various walking pattern and clothing. For the survey we will prepare questioners which will cover approach of data collection, potential traits to collect and possible consequences. For analyzing gait biometric trait, we will apply multivariate statistical classifier through well-known machine learning algorithms in a ready platform. Similarly, for the survey data analysis we will use similar approach to co-relate the user view point for such system. It will also help us to find the perception of the user for the system.

• 음성과학
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• 제7권2호
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• pp.177-189
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• 2000

This paper investigates how individual speakers' speech can be distinguished using acoustic parameters such as amplitude, pitch, and formant frequencies. Word samples from fifteen male speakers in their 20's in three different regions were recorded in two different modes (i.e., casual and clear speech) in quiet settings, and were analyzed with a Praat macro scrip. In order to determine individual speakers' acoustical values, the total duration of voicing segments was measured in five different timepoints. Results showed that a high correlation coefficient between $F_1\;and\;F_2$ in formant frequency was found among the speakers although there was little correlation coefficient between amplitude and pitch. Statistical grouping shows that individual speakers' voices were not reflected in regional dialects for both casual and clear speech. In addition, the difference of maximum and minimum in amplitude was about 10 dB which indicates a perceptually audible degree. These acoustic data can give some meaningful guidelines for implementing algorithms of speaker identification and speaker verification.

• 음성과학
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• 제8권3호
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• pp.43-50
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• 2001

This paper deals with voice similarities between sisters who are supposed to have common physiological characteristics from a single biological mother. Nine pairs of sisters who are believed to have similar voices participated in this experiment. The speech samples obtained from one pair of sisters were eliminated in the analysis because their perceptual score was relatively low. The words were measured in both isolation and context, and the subjects were asked to read the text five times with about three seconds of interval between readings. Recordings were made at natural speed in a quiet room. The data were analyzed in pitch and formant frequencies using CSL (Computerized Speech Lab) and PCQuirer. It was found that data of the initial vowels are much more similar and homogeneous than those of vowels in other positions. The acoustic data showed that voice similarities are strikingly high in both pitch and formant frequencies. It is assumed that statistical data obtained from this experiment can be used as a guideline for modelling speaker identification and speaker verification.

• Computers and Concrete
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• 제14권2호
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• pp.145-161
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• 2014

The article presents the statistical method of grouping the results of the compressive strength of concrete in continuous production. It describes the method of dividing the series of compressive strength results into batches of statistically stable strength parameters at specific time intervals, based on the standardized concept of "concrete family". The article presents the examples of calculations made for two series of concrete strength results, from which sets of decreased strength parameters were separated. When assessing the quality of concrete elements and concrete road surfaces, the principal issue is the control of the compressive strength parameters of concrete. Large quantities of concrete mix manufactured in a continuous way should be subject to continuous control. Standardized approach to assessing the concrete strength proves to be insufficient because it does not allow for the detection of subsets of the decreased strength results, which in turn makes it impossible to make adjustments to the concrete manufacturing process and to identify particular product or area on site with decreased concrete strength. In this article two independent methods of grouping the test results of concrete with statistically stable strength parameters were proposed, involving verification of statistical hypothesis based on statistical tests: Student's t-test and Mann - Whitney - U test.

• 물과 미래
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• 제25권2호
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• pp.89-97
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• 1992

본 연구는 한강유역내 수위표지점 중에서 댐에 의한 인위적 유량 조작을 받지 않는 자연하천유역에서의 지점들을 대상으로 홍수빈도예측을 위한 통계학적 모형의 적용성을 비교 검토하였고 그 결과 적용 가능한 것으로 입증하였다. 또한 홍수빈도모형에 의한 홍수추정량으로 부터모형의 통계학적 효용성을 검토한 결과, 단 기간 기록년수의 자료에서 유용한 부분기간치계열 방법에 의한 POT모형이 연최대치계열 방법에 의한 ANNMAX형보다 효과적임이 판명되었다.

• Smart Structures and Systems
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• 제12권2호
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• pp.181-207
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• 2013

In this paper, a statistical reference-free real-time damage detection methodology is proposed for detecting joint and member damage of truss bridge structures. For the statistical damage sensitive index (DSI), wavelet packet decomposition (WPD) in conjunction with the log likelihood ratio was suggested. A sensitivity test for selecting a wavelet packet that is most sensitive to damage level was conducted and determination of the level of decomposition was also described. Advantages of the proposed method for applications to real-time health monitoring systems were demonstrated by using the log likelihood ratios instead of likelihood ratios. A laboratory truss bridge structure instrumented with accelerometers and a shaker was used for experimental verification tests of the proposed methodology. The statistical reference-free real-time damage detection algorithm was successfully implemented and verified by detecting three damage types frequently observed in truss bridge structures - such as loss of bolts, loosening of bolts at multiple locations, sectional loss of members - without reference signals from pristine structure. The DSI based on WPD and the log likelihood ratio showed consistent and reliable results under different damage scenarios.

• 한국수학교육학회지시리즈A:수학교육
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• 제58권3호
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• pp.459-481
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• 2019

본 연구는 실제 자료로 통계적 과정을 경험할 수 있는 교수 학습 자료를 개발하고 수업에 적용했을 때 나타나는 중학교 1학년생들의 통계적 사고를 단계별, 수업형태별로 비교분석하였다. 그 결과 통계적 사고와 수업 형태간의 연관성이 있으며 단계별, 수업 형태별 차이가 나타났다. 향후 통계교육을 위한 교수 학습 모델의 설계와 적용에 유용한 시사점을 제공하였다.

• 벤처혁신연구
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• 제3권2호
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• pp.41-76
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• 2020

본 연구는 스마트팩토리 도입의도에 영향을 미치는 요인을 실증 분석을 통해 확인하였다. 4차산업혁명의 핵심분야인 스마트팩토리 도입에 있어서 어떤 요인이 중요하게 영향을 미치는가에 대한 연구이며, 아직까지 스마트팩토리 분야에서 기술 수용에 관한 연구가 부족한 상황에서 학술적 실무적 의의가 있다고 믿는다. 정보기술의 수용요인 연구에 설명력이 검증된 통합기술수용이론(UTAUT)을 기반으로 연구를 진행하였으며, UTAUT 이론의 4가지 독립변수인 성과기대, 노력기대, 사회적영향, 촉진조건에 추가로 스마트팩토리의 특성상 중요한 요인으로 예상되는 정부지원기대(Government Assistance Expectancy)를 독립변수에 추가하였다. 또한 스마트팩토리 기술수용의 기술적인 요인을 확인하고자 과업기술적합도(Task Technology Fit)변수 추가하여 스마트팩토리 도입의도에 미치는 영향관계를 실증 분석하였다. 또한 과업기술적합도의 선행변수인 과업특성(Task Characteristics)과 기술특성(Technology Characteristics)이 과업기술적합도에 어떠한 영향을 미치는지에 대한 분석도 진행하였다. 새로운 기술에 대한 신뢰(Trust)의 정도가 기술의 수용에 있어 매우 중요한 영향을 미칠 것으로 예상되어 신뢰를 매개변수로 추가하였다. 마지막으로 새로운 정보기술에 의한 혁신이 사용자에게 불가피하게 거부감을 야기할 수 있다는 선행연구들을 토대로 혁신저항(Innovation Resistance)을 조절역할을 하는 연구변수에 추가하여 실증적 검증을 진행하였다. 연구 결과 성과기대, 사회적 영향, 정부지원기대, 과업기술적합도는 스마트팩토리 도입의도에 정(+)의 영향을 미쳤다. 영향력의 크기는 정부지원기대(β=.487) > 과업기술적합도(β=.218) > 성과기대(β=.205) > 사회적영향(β=.204) 순으로 나타났다. 과업특성과 기술특성은 모두 과업기술적합도에 정(+)의 영향이 확인되었으며, 과업특성(β=.559)이 기술특성(β=.328)보다 과업기술적합도에 더 영향이 큰 것으로 나타났다. 신뢰에 대한 매개 효과 검정에서 6개 독립변수 각각과 스마트팩토리 도입의도 간에 신뢰의 통계적으로 유의미한 매개역할은 확인되지 않았다. 혁신저항의 조절효과 검정을 통해, 혁신저항이 정부지원기대와 스마트팩토리 도입의도 간 정(+)의 조절역할을 하는 것으로 나타났다. 즉 혁신저항이 크면 클수록 정부지원기대가 스마트팩토리 도입의도에 미치는 영향력이 혁신저항이 적은 경우보다 커지는 것으로 나타났다.