• 감성과학
• /
• 제20권3호
• /
• pp.39-48
• /
• 2017

이 연구는 농구 경기장내 마케팅의 효용성을 확인하기 위해서 마케팅의 여러 연구 기법들 중 시선추적 기술을 이용하여 동공이 확장 되었을 때의 시선 관찰 및 관심도를 측정하고 비교 분석하였다. 특히 동공이 확장된 구간을 산출하기 위해 유효테이터를 중심으로 동공의 크기가 2시그마 범위 상위 2.275%일 때의 구간별 데이터를 정리하고 이전 연구에서 산출된 3시그마의 상위 0.135%일 때의 구간별 데이터와 전체 유효 데이터를 주시 빈도에 따른 변곡점으로 구분하여 분석하였다. 또한 전체 유효 데이터와 동공의 크기가 유의미하게 커졌다고 판단되는 범위들 간의 상관도를 분석하였다. 그 결과 가장 시선이 많이 머무른 구간과 동공이 크기가 유의미하게 커진 부분은 완전히 일치하지는 않았으나, 전체 유효 데이터와 동공크기 2시그마 상위 데이터의 상관분석은 .805로 가장 높은 상관관계를 나타내었으며, 동공크기 2시그마 상위 데이터와 동공크기 3시그마 상위 데이터의 상관분석은 .781의 상관관계를 보였고 전체 유효데이터와 동공크기 3시그마 상위 데이터 상관분석은 .683의 상관관계를 보였다. 따라서 동공의 크기가 확장 되어진 구간과 시선추적 데이터에서 시선이 많이 머무른 구간이 유사함을 알 수 있었으나, 동공의 크기가 유의미하게 확장되었다고 판단되어지는 구간의 데이터 일수록 전체 데이터와의 상관도가 떨어지는 것을 알 수 있었다.

• 한방비만학회지
• /
• 제12권2호
• /
• pp.8-16
• /
• 2012

Objectives: This study is designed to report the correlation between Body Mass Index(BMI), Heart Rate Variability(HRV), stess, drinking alcohol, coffee and smoking. Methods: From 1st January 2010 to 31st December 2012, We tested on 458 patients who hospitalized in Cheong Yeon Korean Medicine Hospital for reducing their weights, then we collected the statistical analysis with the result of their HRV and the special survey. Results: This experiment was studied on total 458 patients, 27 were men and 431 were women. The average of the age of men was $28.23{\pm}4.22$ and $24.31{\pm}385$ was women. There were significant differences in BMI, Low frequency(LF), High frequency(HF), stress score, frequency of drinking alcohol, smoking and drinking coffee followed by their ages. When we looked at the correlation between obesity with smoking and drinking coffee, we can see that the BMI increased, the frequency of drinking alcohol was decreased, however there were no statistic correlation in smoking and drinking coffee with BMI. Conclusions: With the result of HRV, we can suggest the BMI and stress score are correlated each other but we need further studies about passive stress relief by taking favourite food such as drinking alcohol, smoking, drinking coffee, etc.

• 농업과학연구
• /
• 제46권4호
• /
• pp.955-969
• /
• 2019

Analyzing on-line consumer responses is directly related to the management performance of food companies. Therefore, this study collected and analyzed data from an on-line portal site created by consumers about food companies with issues and examined the relationships between the data and the management performance. Through this process, we identified consumers' awareness of these companies obtained from big data analysis and analyzed the relationship between the results and the sales and stock prices of the companies through a time-series graph and correlation analysis. The results of this study were as follows. First, the result of the text mining analysis suggests that consumers respond more sensitively to negative issues than to positive issues. Second, the emotional analysis showed that companies' ethics issues (Enterprise 3 and 4) have a higher level of emotional continuity than that of food safety issues. It can be interpreted that the problem of ethical management has great influence on consumers' purchasing behavior. Finally, In the case of all negative food issues, the number of word frequency and emotional scores showed opposite trends. As a result of the correlation analysis, there was a correlation between word frequency and stock price in the case of all negative food issues and also between emotional scores and stock price. Recently, studies using big data analytics have been conducted in various fields. Therefore, based on this research, it is expected that studies using big data analytics will be done in the agricultural field.

• Earthquakes and Structures
• /
• 제18권4호
• /
• pp.507-517
• /
• 2020

This study aims to present new frequency-related seismic intensity parameters (SIPs) based on the Hilbert-Huang Transform (HHT) analysis. The proposed procedure is utilized for the processing of several seismic accelerograms. Thus, the entire evaluated Hilbert Spectrum (HS) of each considered seismic velocity time-history is investigated first, and then, a delimited area of the same HS around a specific frequency is explored, for the proposition of new SIPs. A first application of the suggested new parameters is to reveal the interrelation between them and the structural damage of a reinforced concrete frame structure. The index of Park and Ang describes the structural damage. The fundamental frequency of the structure is considered as the mentioned specific frequency. Two statistical methods, namely correlation analysis and multiple linear regression analysis, are used to identify the relationship between the considered SIPs and the corresponding structural damage. The results confirm that the new proposed HHT-based parameters are effective descriptors of the seismic damage potential and helpful tools for forecasting the seismic damages on buildings.

• Wind and Structures
• /
• 제38권1호
• /
• pp.59-74
• /
• 2024

Large Eddy Simulation (LES) is used to explore the influence of vibration frequency and amplitude on the aerodynamic performance of a rectangular cylinder with an aspect ratio of B/D=5 (B: breadth; D: depth of cylinder) at a Reynolds number of 22,000 near resonance frequency. In smooth flow conditions, the research employs a sequence of three-dimensional simulations under forced vibration with diverse frequency ratios f_e / f_o = 0.8-1.2 (f_e : oscillation frequency; f_o : Strouhal frequency when the rectangular cylinder is stationary ) and oscillation amplitudes A_h/D = 0.05 - 0.3. The individual influences of f_e / f_o and A_h/D on the characteristics of integrated and distributed aerodynamic forces are the focal points of discussion. For the integrated aerodynamic force, particular emphasis is placed on the analysis of the dependence of velocity-proportional component C₁ and displacement-proportional component C₂ of unsteady aerodynamic force on amplitude and frequency ratio. Near the resonance frequency, the dependencies of C₁ and C₂ on amplitude are stronger than that of frequency ratio. For the distributed aerodynamic force, the increase in frequency and amplitude promotes the position of the main vortex core and reattachment to the leading edge in the streamwise direction. In the spanwise direction, vibration enhances the spanwise correlation of aerodynamic force to weaken the three-dimensional effect of the flow field, and a lower frequency ratio and larger amplitude amplify this effect.

• 한국농업기계학회:학술대회논문집
• /
• 한국농업기계학회 2000년도 THE THIRD INTERNATIONAL CONFERENCE ON AGRICULTURAL MACHINERY ENGINEERING. V.III
• /
• pp.533-542
• /
• 2000

Instrumentation and technologies are described for determining the vibration response characteristics of the pear with frequency range 5 to 320Hz. The computer program for controlling the vibration exciter and the function generator and for measuring the vibration response characteristics of the pear was developed. Mechanical properties such bioyield deformation, rupture deformation and apparent elastic modulus etc. were compared with the vibration response characteristics of the pear. The resonant frequency of the pear ranged from 53 to 102Hz and the amplitude at resonance was between 1.08 and 2.48g-rms. The resonant frequency and amplitude at resonance decreased with the increase of the sample mass, and they were slightly affected by mechanical properties such as bioyield deformation and rupture deformation. Regression analysis was performed among the relatively high correlated parameters from the results of correlation coefficient analysis.

• 대한의용생체공학회:학술대회논문집
• /
• 대한의용생체공학회 1992년도 춘계학술대회
• /
• pp.133-138
• /
• 1992

Evoked otoacoustic emission (e-OAE) signals are measured from adult and analyzed by computer. Stimulation and detection are repeated and averaged 1000 times for noise cancellation. e-OAE signals are analyzed on frequency domain and time domain. The frequency domain analysis reveals that frequency of stimulus and emission has lineal relationship in 50 dB input sound amplitude. This result altos the cross correlation method to be applied for latency calculation. As the stimulus frequency grows higher, the latency tine is shorter and the gain or emission signal becomes greater. We introduced two mathmatical functions to identify these latecy and gain. These results can be utilized for cochlear modeling.

• 한국위성정보통신학회논문지
• /
• 제11권2호
• /
• pp.69-73
• /
• 2016

In order to derive reliable propagation models for future millimeter-wave frequency indoor pico-cellular communications systems, accurate reflectivity data of building materials is necessary. The broad variety of building materials and construction codes makes accurate attenuation prediction very difficult without the support of specific construction data or measurements. This paper derives a transmission and reflection coefficient based on 13 GHz to 28 GHz measurement data. Transmission and reflection is measured by applying change in the reception angle of each building material, such as plasterboard. The transmission and reflection coefficient derived shows a correlation between frequency dependence and angle. As a result, as the reception angle is reduced, the reflected angle from the transmitter that could be received increases, showing that there is a correlation. In addition, the fundamental investigations carried out lay the foundation for radio channel-related research, which is essential for the development of future millimeter-wave communications systems.

• 한국소음진동공학회:학술대회논문집
• /
• 한국소음진동공학회 2008년도 춘계학술대회논문집
• /
• pp.766-771
• /
• 2008

In this paper, the vibration of high speed trains and the irregularity of railway are examined using a wavelet-based frequency response function. To investigate their characteristics, non-stationary acceleration data are acquired and processed using the wavelet transform. Also, the railway irregularity is examined by acquiring the data from the on-board laser-based measurement system. The correlation between the train vibration and the railway irregularity has been investigated. From the analysis, the wavelet-based frequency response function is a promised method for the dynamic characteristics of high speed trains.

• 한국의류학회지
• /
• 제27권11호
• /
• pp.1179-1189
• /
• 2003

This study had a focus on service quality, customer satisfaction and relationship orientation. The subjects of this study were: 1) to examine the conceptual structure of service quality perceived by males consumers of character clothing brands, 2) to examine of the service quality on customer satisfaction, and 3)to examine relationship between customer satisfaction and relationship orientation. The questionnaire was collected between October, 28 and November, 8 in 2002. Samples of 271 respondents were obtained. The sample consisted of males in their twenties and thirties who had a experience on buying character clothing brands in Seoul. To analyze the data, reliability analysis, percentage, frequency analysis, factor analysis, correlation analysis, and regression analysis were applied. The results were as followings: 1) As a result of factor analysis, the service quality were identified by four dimensions: environmental service, personal service, products service, and promotion service. 2) As a result of correlation analysis and regression analysis, the service quality had a positive influence on customer satisfaction. Especially products service was the most important factor for customer satisfaction, followed by environmental service. 3) As a result of correlation analysis, customer satisfaction had a positive influence on relationship orientation.