• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 1999년도 제16회 동계학술발표회 논문집
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• pp.296-327
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• 1999

Nowadays, there is a huge need of an extensive study to understand features and behavior modes of consumers who have an indefinite potential of purchase and to make EC a bullish market, Recently, the flow construct has been proposed as important for understanding consumer behavior on the cyber space. The purpose of this study is threefold. To investigate (1) the effect of the flow experience when navigating Internet shopping-mall sites and Internet on purchase intention and relational factors of this (2) the difference in the flow experiences between during the time of navigating Internet and during the time of navigating Internet shopping-mall sites. (3) the difference in purchase intention and relational factors of this between an experiential flow and a purposeful flow. The results show that (1) increase of the purchase intention on EC (or relational factors of this) in proportion to the degree of cognition of users' flow experience (2) By the separate motive of searching Internet shopping-mall sites, the flow experiences during the time of navigating Internet lead to different results (3) Although the difference in the purchase intention on EC between subjects is nonsignificant, it suggests that we need to focus on the fact that the correlation between the purchase intention on EC and the purposeful flow experience on Internet shopping-mall sites is greater than any other correlation. In the end of this study, The theoretical and practical implications of the study, limitations of the study, and future research implications are discussed.

• 전기학회논문지
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• 제58권1호
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• pp.173-180
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• 2009

It is difficult to predict non-stationary or chaotic time series which includes the drift and/or the non-linearity as well as uncertainty. To solve it, we propose an effective prediction method which adopts data preprocessing and multiple model TS fuzzy predictors combined with model selection mechanism. In data preprocessing procedure, the candidates of the optimal difference interval are determined based on the correlation analysis, and corresponding difference data sets are generated in order to use them as predictor input instead of the original ones because the difference data can stabilize the statistical characteristics of those time series and better reveals their implicit properties. Then, TS fuzzy predictors are constructed for multiple model bank, where k-means clustering algorithm is used for fuzzy partition of input space, and the least squares method is applied to parameter identification of fuzzy rules. Among the predictors in the model bank, the one which best minimizes the performance index is selected, and it is used for prediction thereafter. Finally, the error compensation procedure based on correlation analysis is added to improve the prediction accuracy. Some computer simulations are performed to verify the effectiveness of the proposed method.

• Child Health Nursing Research
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• 제12권2호
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• pp.180-188
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• 2006

Purpose: The purpose of this study was to explore family function, social support, perceived quality of life(QOL) in adolescent period and to find out the correlations between family function, social support, perceived QOL in adolescents. Method: The questionnaire to get some information for this study consisted of adolescents'general characteristics, 20 questions regarding family function, 11 questions regarding social support, 8 questions regarding perceived QOL in adolescents. The subjects of this study consisted of 128 adolescents who were living in S area. The data were analyzed by percentage, mean, t-test, ANOVA and Pearson's correlation using the WINSPSS program. Result: The mean score for family function was 3.07(max. : 5) and there was significant difference according to middle-high school student. The mean score for social support was 2.86(max : 5) and there was no significant difference. The mean score for perceived QOL was 4.02(max score: 7) and there was significant difference according to disease condition. There was a positive correlation between family function, social support, perceived QOL in adolescents. Conclusion: Consequently, the development of program, policy assistance and policy implementation to elevate juveniles' perceived quality of life is strongly required.

• 한국멀티미디어학회논문지
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• 제3권6호
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• pp.604-610
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• 2000

스테레오 음향 반향 제거기는 각 채널 신호 사이의 상호상관(cross-correlation)이 크기 때문에 수신실의 반향경로를 추정하는 적 응필터 계수가 반향경로를 잘못 추정하거나 수렴이 느려진다. 본 논문에서는 스테레오 신호의 차성분(difference factor)의 절대값을 이용하여 전처리기를 구성함으로써 스테레오 신호의 상호상관을 줄여 스테레오 음향 반향 제거 성능을 향상시키는 방법을 제안한다 기존의 반파 정류 필터를 이용한 전처리기와 비교하여 제안하는 전처리기가 반향 제거 성능이 우수함을 컴퓨터 시뮬레이션을 통해서 확인한다. 그리고 전송실의 경로변화에도 성능이 저하되지 않는 것을 확인하였다.

• 한국멀티미디어학회논문지
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• 제20권2호
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• pp.404-419
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• 2017

This study is to examine how middle and high school students vary in terms of good and bad usage of online games and how these factors have varying effects on their use of the internet as a whole. My focus is to study their behavioral patterns individually while playing internet-based online games. The results are as follows: First, 260 out of 390 subjects used the internet. Male students who are high school students with siblings, or preschool time game users were revealed to play online games more often rather than female students who are middle school students with no siblings, or non-preschool time game users. Secondly, the analysis of differences of good and bad usage of online games revealed that there is a significant correlation between gender and beginning age. Lastly, a thorough analysis of the average difference in terms of following the online game shutdown found that there is no significant correlation among the sub-groups. However, an analysis of the difference of the problematic game usage has shown that there is a significant difference in the heavy user group. This findings means that the students who don't follow the online game shutdown spend more time than those who do.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2006년도 하계종합학술대회
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• pp.241-242
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• 2006

MPEG Surround is an audio coding technology that represents multi-channel audio signal with downmixed audio signal(s) and very low bitrate side information based on Binaural Cue Coding. The side information consists of Inter-Channel Level Difference, Inter-Channel Correlation, and payloads. These two parameters are correspondent to the well-known spatial parameters in psycho-acoustics, Inter-aural Level Difference (ILD) and Inter-Aural Cross Correlation (IACC). Though ICLD is to provide perceptually equivalent ILD to the listener, however, the ILD of the original multi-channel audio signal and that of the MPEG Surround encoded signal was different. The difference between two ILD values is defined as ILD Distortion (ILDD). This paper provides how ILDD can be applied to enhance sound quality in MPEG Surround and how much ILDD is decreased.

• 간호행정학회지
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• 제15권1호
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• pp.26-36
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• 2009

Purpose: This study was undertaken in order to investigate the relationships between critical thinking disposition, professional nursing competence and job satisfaction in clinical nurses. Method: A convenience sample of 221 registered nurses were obtained from one hospital in Seoul. The data were analyzed by descriptive statistics, t-test, ANOVA, Scheffe' test, Pearson correlation coefficient using SPSS WIN 14.0 program. Results: There were a statistically significant difference in the critical thinking disposition according to age, marital status, career length, and department. There were a statistically significant difference in professional nursing competence according to role, age, career length, current position, and department. There were a statistically significant difference in job satisfaction according to age, marital status, career length, and department. A significant positive correlation between critical thinking disposition and professional nursing competence, and job satisfaction was found. Conclusion: Critical thinking disposition, professional nursing competence and job satisfaction of clinical nurses are significantly related. To improve professional nursing competence and job satisfaction of clinical nurses, it need to use actively the critical thinking disposition with resonable salary. And it need to prepare the nursing education and strategy to increase the job satisfaction of clinical nurses.

• 대한물리치료과학회지
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• 제25권3호
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• pp.1-8
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• 2018

Background: The purpose of this study is to provide basic data on physical therapy intervention by comparing the physical ability and fall efficacy and depression of elderly and hospitalized elderly. Method: This study was carried out with 22 hospitalized elderly who can live in Y-Hospital and 22 elderly people in Busan. We measured body mas index, time up & go test, function reach test, 10m walking test, bracket lifting test, fall efficacy and geriatric depression scale. The data collection period was from November to December 2017. The collected data was analyzed using SPSS Win 18.00 program. Results: There was a significant difference between the elderly and hospitalized elderly form physical ability and depression(p<.05). But Fall efficacy was no significant difference(p>.05). 10m walking with TUG, heel with fall efficacy showed quantitative correlation and 10m walking with fall efficacy, depression with fall efficacy, heel with TUG, 10m walking showed amulet correlation. There was a statistically significant difference. Conclusion: Elderly showed better results in physical ability and depression than hospitalized patients.

• 한국임상보건과학회지
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• 제11권1호
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• pp.1632-1638
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• 2023

Purpose: The aim of this study was to determine the distribution of the cornea thickness and intra ocular pressure Korean adult of 20 to 24 year old using the Pentacam and tonometer. Methods: The subjects of this study were 43 Korean adults with healthy eyes. Corneal thickness was measured with Pentacam device. The intra ocular pressure was measured with tonometer. Data was analyzed by means of the Pearson's correlation cofficient. P-values<0.001 were considered statistically significant. Results: Mean age of subjects was 20.41±0.86 years. The mean +/- intra ocular pressure of the right eye and left eye were 16.236±2.523mmHg and 16.971±1.992mmHg, respectively. The mean central corneal thickness of the right eye and left eye was 545.324±38.682㎛ and 547.442±33.778㎛, respectively. No significant difference in central corneal thickness was found between the right and left eyes. But, there was a statistically significant difference between central cornea thickness and peripheral cornea thickness around 4 mm of central cornea(p<0.001, Pearson's correlation). However there was no statistically significant difference between central cornea thickness and intra ocular pressure. Conclusion: The results of this study could be used as a clinical reference data for diagnosis and treatment of cornea in Korean adult.

• Journal of Information Technology Applications and Management
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• 제24권1호
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• pp.157-167
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• 2017

This paper proposes a simple sound source localization (SSL) method based on signal energies comparison and partial cross correlation for TDOA computation. Many sound source localization methods include multiple TDOA computations in order to eliminate front-back confusion. Multiple TDOA computations however increase the methods' computation times which need to be as minimal as possible for real-time applications. Our aim in this paper is to achieve the same results of localization using fewer computations. Using three microphones, we first compare signal energies to predict which quadrant the sound source is in, and then we use partial cross correlation to estimate the TDOA value before computing the azimuth value. Also, we apply a threshold value to reinforce our prediction method. Our experimental results show that the proposed method has less computation time; spending approximately 30% less time than previous three microphone methods.