• Journal of Digital Convergence
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• 제15권10호
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• pp.103-111
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• 2017

This study was performed with a view to examine the nature and difference of EFA(Exploratory Factor Analysis) and CFA(Confirmatory Factor Analysis), and to compare the analysis process and result of EFA and CFA with the same data. The result of empirical analysis was as follows. Meanwhile, p.1, p.3 was removed owing to hampering the convergent validity in EFA, p.3 was removed owing to hampering the discriminent validity in CFA. EFA was reduction process of muti measurement variables to a few factor, but CFA was understanding and confirmatory process of measurement and latent variables' relation. Eventually, this study showed that EFA and CFA used different methology, thus the different outcomes appeared although using the same data, and implicated resonable application of methology according to given data.

• Journal of the Korea Institute of Information and Communication Engineering
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• 제20권9호
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• pp.1673-1678
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• 2016

In the area of the speech recognition processing, background noises are caused the incorrect response to the speech input, therefore the speech recognition rates are decreased by the background noises. Accordingly, a more high level noise processing techniques are required since these kinds of noise countermeasures are not simple. Therefore, this paper proposes an algorithm to distinguish between the stationary background noises or non-stationary background noises and the speech signal having short time duration in the noisy environments. The proposed algorithm uses the characteristic parameter of the improved speech signal as an important measure in order to distinguish different types of the background noises and the speech signals. Next, this algorithm estimates various kinds of the background noises using a multi-layer perceptron neural network. In this experiment, it was experimentally clear the estimation of the background noises and the speech signals.

• Journal of the Korea Society of Computer and Information
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• 제14권10호
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• pp.83-92
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• 2009

In this paper, an extended snake algorithm using color variance energy is proposed for segmenting an interest object in color image. General snake algorithm makes use of energy in image to segment images into a interesting area and background. There are many kinds of energy that can be used by the snake algorithm. The efficiency of the snake algorithm is depend on what kind of energy is used. A general snake algorithm based on active contour model uses the intensity value as an image energy that can be implemented and analyzed easily. But it is sensitive to noises because the image gradient uses a differential operator to get its image energy. And it is difficult for the general snake algorithm to be applied on the complex image background. Therefore, the proposed snake algorithm efficiently segment an interest object on the color image by adding a color variance of the segmented area to the image energy. This paper executed various experiments to segment an interest object on color images with simple or complex background for verifying the performance of the proposed extended snake algorithm. It shows improved accuracy performance about 12.42 %.

• Journal of Global Scholars of Marketing Science
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• 제16권3호
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• pp.39-60
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• 2006

The purpose of this study is to investigate the effect of two different characteristics of music(tempo) and advertising photograph(type) in a fashion store on consumers' emotional responses and approach behavior and to suggest competitive in-store atmospheric strategies. To test the conceptual model, this study used a video simulation method. Researchers selected a fashion casual wear retail store for young people and videotaped to provide realistic store settings. Two different levels of background music(fast, slow) and advertising photograph(sexy, cheerful) were inserted into the video clip generating four stimuli. Including a stimulus for the control group, 5 video clips were created. A total of 289 subjects answered the questionnaire after viewing a two-minute video clips. The results are as follows: First, advertising photograph in a store had a significant effect on consumers' in-store emotional state, whereas musical tempo did not. Second, the effect of in-store consumers' emotional state on behavioral reponses were investigated. Results showed that consumers' positive emotional state lead to consumers' approach behavior. The results of this study indicated that background music and advertising photograph in a fashion store affected consumers' in-store emotional state, and ultimately these affected consumers' positive approach behavior. Thus retailer should try to create a pleasant store environment using effective store atmospheric factors like background music and advertising photograph.

• Journal of the Korean Crystal Growth and Crystal Technology
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• 제6권2호
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• pp.141-154
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• 1996

Intrinsic layers of homoepitaxial InP grown by the hydride vapor phase epitaxy (VPE) technique were investigated by Fourier-transform photoluminescence(FTPL) and variable temperature Hall measurements. The effect of process variables (i.e., source zone temperature and inlet mole fractions of HCl and $PH_{3}$) on the backgroudn impurity levels was investigated. The background carrier concentration was found to decrease with decreasing source zone temperature and increasing HCl, but was relatively independent of $PH_{3}$ for the range of mole fraction studied. The presence of background donors and acceptors was clearly verified in the FTPL spectra, and the major impurities were tentatively identified as Si donors and Zn acceptors as well as some unidentified acceptors.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.162-164
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• 1996

다른 배경음악의 종류와 수준이 어떻게 컴퓨터 문서편집작업의 수행능력에 영향을 주는지를 알아보기위해 18명의 대학생을 대상으로 2인자 혼합인자 실험계획법을 이용하여 실험을 실시하였다. 실험에 사용된 독립변수로는 "클래식, 록, 그리고 한국민속음악"의 3종류를 갖는 음악형태와 "Low (60~65dB), High(80~85dB)"의 2수준을 갖는 음악크기이며, 분석을 위해 수집된 종족변수치는 문서편집작업의 완료시간 및 작업에러수이다. 분산분석을 이용한 통계분석 결과, 높은 (80~85 dB) 배경음악수준하에서는 낮은 (60~65 dB) 수준에 비해 통계적으로 문서편집작업의 완료시간이 많이 걸렸으며, 특히 록음악이 높은 수준으로 연주될때는 낮은 수준에 비해 유의하게 많은 문서편집작업에러가 발생하였다. 많은 문서편집작업에러가 발생하였다.

• 한국벤처창업학회:학술대회논문집
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• 한국벤처창업학회 2017년도 추계학술대회
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• pp.53-61
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• 2017

최근 창업분야에서 나타나는 현상을 보면, 창업자에게 창업기회가 일생에 한번만 오는 것이 아니라 몇 차례의 창업을 시도한 창업자를 많이 볼 수 있게 된다. 이러한 경우에 창업자의 성공과 실패에 대한 과거의 창업 경험이 이후에 진행되는 창업의 성패에 중요한 요인으로 작용하는 것을 창업에 있어서 주된 현상으로 관찰하게 된다. 따라서, 본 연구는 이와 같은 현상에 주목하여 1차 창업을 한 독립창업자가 사업을 더욱 성장시키기 위한 전략으로 2차 창업을 계획하고 진행하는 현상에 대한 연구를 진행하고 한다. 연구를 통해 1차 창업을 진행한 독립창업자가 2차 창업이라고 할 수 있는 프랜차이즈 가맹본부의 창업을 성장전략으로 고려할 때, 어떤 요인이 영향을 주는지를 살펴보고, 이 요인들 사이에는 어떤 관계를 갖는지를 알아보고자 하는 것이 본 연구의 목적이다. 본 연구는 기존 선행연구를 바탕으로 한 이론적 배경으로 연구를 진행하고자 독립창업자의 기업가정신과 환경요인을 독립변수로, 프랜차이즈 가맹본부 창업의지를 종속변수로, 창업자의 창업경험과 프랜차이즈 가맹본부 창업교육을 매개변수로 설정한 이후에, 각 변수 간에 어떤 영향을 주고 있는지에 대한 연구를 진행하기 위해 설정한 연구모델에 대하여 크게 4가지의 가설을 설정하고 이에 대한 실증분석을 진행하였다. 본 연구의 결과를 바탕으로 살펴 보면, 독립창업자의 프랜차이즈 가맹본부 창업의지가 높아지기 위해서는 1)독립창업자의 기업가 정신이 높고, 환경요인이 우호적일수록 프랜차이즈 가맹본부 창업의지에 긍정적인 영향을 주게 되고, 2)독립창업자의 창업경험을 통해서 자기효능감이 높아짐으로써 프랜차이즈 가맹본부 창업의지에 긍정적인 영향을 주게 되고, 3)프랜차이즈 가맹본부 창업교육의 참여 기회를 통해 프랜차이즈 가맹본부 창업의지에 긍정적인 영향을 주게 됨을 제시하고 있다.

• Journal of Digital Convergence
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• 제17권3호
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• pp.413-425
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• 2019

We see many images every day, some of these images are stored in memory, and the majority are immersed in the unconscious world. Visual elements are seen by personal attention or by visual or biological attention factors. Specific and clear discovery of this visual attention has not yet been made. However, there is an interesting discussion of this visual attention in the fields of interior, design, visual perception, advertising, and psychology. Advertising photographers are expected to produce what their work will have on viewers and consumers. However, the adjustment of subject, exposure, color, or post-production, which could have a visual effect on the consumer, was determined only by the photographer's senses rather than the experimental verification. The advertisement photographs provide a specific image related to the object to be advertised and deliver a certain message. Therefore, it is necessary to understand the effect of the image in a certain visual way. According to previous studies, there are two major factors that affect the visual impression of the viewer. One is the factor depending on the type and content of the subject and the other is the factor about the density and color of the subject. The purpose of this study is to investigate the meaningful changes in the visual perception depending on the shape, content, color and tone of the subject, which can be called the main subject, And to analyze the effects of I will study some implications of visual elements through various analyzes.

• Electronics and Telecommunications Trends
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• 제5권4호
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• pp.88-98
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• 1990

본 고에서는 통신의 궁극적인 목표라 할 수 있는 이동통신 시스템 설계시 중요한 변수로 등장하고 있는 핸드오버 알고리즘의 개발전략을 세우기 위해서 기존의 애널로그 이동통신에서 사용하고 있는 핸드오버 개념과 기술적인 배경에 대해서 분석하고, 핸드오버 성능을 평가하는 시뮬레이터 구성시 고려해야 할 사항등에 대해서 분석 검토하였다.

• Journal for History of Mathematics
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• 제9권2호
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• pp.15-21
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• 1996

적률법(method of moment)이란 변수 X의 멱승에대한 기대치를 이용하여 분포의 성질을 알아보는 방법이다. 여기서 적률법이 이용되어진 역사적 배경을 소개하고, 3차 적률들의 선형적 성질을 비교하였다. 먼저, Kagan이 입증한 표본평균에 관한 3차 표본적률의 선형적 성질과 Bayesian 경우에 3차 사후적률(posterior moment)과 사후평균(posterior)의 선형성을 소개하였다. 그리고, 자연지수족(natural exponential family)아래서도 표본평균에 관한 3차 표본적률의 선형성을 알아보기 위해 단순함수(simple function)의 형태로 유도하였으며, 정규분포인 경우에 적용시켜 보았다.