• Transactions of the Korean Society of Mechanical Engineers A
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• v.41 no.3
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• pp.241-249
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• 2017

A powerlock is used to transmit torque between two shafts, to protect important equipment from overloads, and to compensate for the misalignment of assembled shafts. In this study, the effect of the shapes of the inner rings, bolt-fastening force, and friction on power transmission performance of powerlocks is investigated. Finite element analysis and experiments were conducted for two cases, and the analysis results were validated. Analyses were carried out for inner rings of various shapes and for various values of bolt-fastening force and friction coefficient. The main factors that affect the torque transmission performance were investigated based on the analysis results.

• Journal of Fashion Business
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• v.21 no.2
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• pp.16-29
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• 2017

This study examines the effects of body image and the hedonic shopping orientation of female consumers on using fashion information to purchase skinny jeans. For this purpose, an online survey was carried out during the recent year targeting female consumers who had purchased skinny jeans. A total of 464 responses were analyzed in this study. The SPSS 22.0 program was used to perform frequency analysis, factor analysis, reliability analysis, and multiple regression analysis. The results are as follows. First, interest in appearance and apparel had a significant influence on every factor of the hedonic shopping orientation, except for the relational shopping orientation, and interest in body weight had a significant effect on the enjoying, relational, and impulsive shopping orientations. Additionally, body satisfaction, except for the impulsive shopping orientation, had a significant influence on the enjoying, brand, loyalty, and relational shopping orientations; body dissatisfaction affected the brand, loyalty, relational, and impulsive shopping orientations. Second, the enjoying shopping orientation significantly influenced every factor of fashion information, and the brand shopping orientation had a positive effect on mass media information, but a negative effect on street information. Furthermore, the loyalty shopping orientation had a significant influence only on store information, the relational shopping orientation had a significant effect on both mass media and verbal information, and the impulsive shopping orientation did not exert any influence on any factors of fashion information.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.9 no.2
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• pp.49-56
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• 1991

In this study, 3D positioning of CCT digital imagery was done by using a personal computer image processing method to increase the economic and time efficiency of SPOT satellite imagery. Image matching technique which applies statistical theories, was applied to acqusition of satellite imagery. The reliability of these coordinates was anlysed to presente a new algorithm for three dimensional positioning necessary in digital elevation modelling and orthophoto production. In acquiring image coordinates from CCT digital satellite imagery, accuracy of planimetric and height coordinates was improved by applying the image matching technique and it was found through analysis of correlation factors between sizes of target window that 19$\times$19 pixels was the most suitable size for image coordinate acquisition. From these results, it was able to present an algorithm about utility of digital imagery in the analysis of SPOT satellite data.

• Fire Science and Engineering
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• v.30 no.4
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• pp.148-157
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• 2016

The purpose of this study is to investigate the influence of organizational culture to the activities satisfaction of volunteer firefighter. For that, we surveyed 182 volunteer firefighters worked in Sejong city. The survey was analyzed the reliability in questionnaire design by SPSS 20.0 win program. The interrelationship of each factors were confirmed by analysis of frequency, percentage and regression analysis. The regression analysis was performed in order to investigate effects of group, development, hierachy, and rationality culture based organizational culture on activities satisfaction of volunteer firefighter. A factor of group and development culture in organizational culture was found to be a positive influence on the activities satisfaction of the volunteer firefighter under significance probability of < 0.05. The bigger group and development culture the volunteer fire department, the higher the activities satisfaction of the volunteer firefighter. This paper is expected to serve as a basis for the efficient operation of the volunteer fire department in Korea.

• Transactions of the Korean Society of Pressure Vessels and Piping
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• v.4 no.2
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• pp.13-19
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• 2008

In order to predict a remaining life of a plant, it is necessary to select the components that are critical to the plant life. The remaining life of those components shall be evaluated by considering the aging effect of materials used as well as numerous factors. However, when evaluating reliability of nuclear structural components, some problems are quite formidable because of lack of information such as operating history, material property change and uncertainty in damage models. Accordingly, if structural integrity and safety are evaluated by the deterministic fracture mechanics approach, it is expected that the results obtained are too conservative to perform a rational evaluation of plant life. The probabilistic fracture mechanics approaches are regarded as appropriate methods to rationally evaluate the plant life since they can consider various uncertainties such as sizes and shapes of cracks and degradation of material strength due to the aging effects. The objective of this study is to evaluate the structural integrity for a reactor pressure vessel under the small break loss of coolant accident by applying the deterministic and probabilistic fracture mechanics. The deterministic fracture mechanics analysis was performed using the three dimensional finite element model. The probabilistic integrity analysis was based on the Monte Carlo simulation. The selected random variables are the neutron fluence on the vessel inside surface, the content of copper, nickel, and phosphorus in the reactor pressure vessel material, and initial RTNDT.

• Journal of Conservation Science
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• v.25 no.3
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• pp.233-244
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• 2009

This study was focused on the transducer and suitable contact material for stone cultural heritage, and the correlation of direct-indirect method in rock types for scientific development and quantitative evaluation technique of the ultrasonic measurements. As a result, it was identified the transducer (UTREXTX(RX)54kHz) and contact material (rubber clay) of the type 3 were appropriate for the ultrasonic measurements of stone cultural heritage. The direct-indirect correction factors of type 3 were calculated 1.50 for granite, 1.38 for gabbro, 1.58 for quartz diorite, respectively. This result is the first study for improvement in reliability for the ultrasonic measurements, and it will contribute to establishment of the ultrasonic survey method for stone cultural heritage. Also, complementary studies considering the surface irregularity of rocks and various contact materials will carry out, and the database about correlation of direct-indirect in rock types will establish.

• Korean Journal of Community Nutrition
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• v.16 no.3
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• pp.386-397
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• 2011

This study was to investigate the housewives' purchase behaviors on the environment-friendly agricultural products (EFAP) by survey in Daejeon area housewives. 390 questionnaires were used and analysed. Most of the subjects were female (92.6%) distributed evenly in their 40's (55.4%), and graduated from high school (43.6%) or college (36.4%). Subjects' occupation was most housewives (64.1%) and 77.4% of the subjects had monthly family income of 2 million won or more. 76.9% of the subjects had purchased EFAP already. The reason of purchasing EFAP was mainly "good for health" (80.3%), and reason for non-purchasing was "high prices" (28%) or "not so trustworthy" (25.6%). The most purchasing frequency was "once a week" (29%). 46.7% of the subjects spent 20% of their agricultural product cost for EFAP and 38.7% of them spent less than 30,000 won per month for EFAP. On checking of EFAP labeling, the housewives scored 3.59 for the validate date, 3.25 for the place of origin, 2.8 for the quality certification mark by 4-point Likert scale. 65.1% of the subject had intention to increase purchasing of EFAP in future. To promote the consumption of EFAP, the improvement factors were price-cutting (47.9%), trust on producers (18.2%) and quality betterment (17.7%). Accordingly, the consumers prefer EFAP for wellbeing health of families; however, they hesitate to buy due to their high price and the low reliability on producers of EFAP. Thus the producers and the related organization of EFAP should contrive proper countermeasures to increase consumer's satisfaction level on their credibility and price of EFAP.

• Journal of Korean society of Dental Hygiene
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• v.10 no.5
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• pp.897-904
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• 2010

Objectives : The aim is to examine what a selective factor of dental institution in the elderly is, which can be used as a strategy for vitalizing hospital management, and which difference there is in selection of dental institution according to health-promotion lifestyle. Methods : Questionnaire survey of individual interview was carried out targeting 177 old people in over 65 years old of Jeonju, Iksan, and Gunsan in Jeollabuk-do Province by convenience sampling from August 16, 2010 to August 27. The analysis was performed by using SPSS WIN 12.0 program. Results : 1. The average mark of health-promotion lifestyle in the elderly was 2.69 points. The health responsibility was the highest with 2.91 points. 2. The mark of health-promotion lifestyle was higher in the higher educational level of the elderly(p<0.01), when monthly income is more than 2 million won(p<0.01), and in the better subjective awareness of oral condition(p<0.01). 3. The group with high mark of health-promotion lifestyle regarded reliability(p<0.001), economic efficiency(p<0.01), and facilities & cleanliness(p<0.01) as important factors when selecting dental institution. Conclusions : The development and expansion in health-promotion program targeting the elderly are seen to be necessary that reflect difference by sphere in health-promotion lifestyle. There will be necessity for pursuing even a strategy for the elderly in the group who have relatively low characteristic in the practice level of health-promotion lifestyle. Also, given understanding characteristics on the elderly and focusing on management proper for the needs of medical consumers, the successful medical management is thought to be likely possible.

• Journal of Korean society of Dental Hygiene
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• v.12 no.1
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• pp.213-223
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• 2012

Objectives : The purpose of this study is to identify relationships between turnover intention and variable factors among dental hygienists. Methods : Each factor of validity and reliability were investigated using factor analysis and Cronbach's ${\alpha}$. The hypothesis of the data was proven and analyzed using the pearson correlation, regression analysis, and analysis of variance (ANOVA). Results : The independent variables were based on self-efficacy, the dependent variables were based on job satisfaction. The results of the regression analysis were that self-efficacy is as high as job satisfaction. Independent variables based on self-efficacy and job satisfaction. The dependent variable is organizational commitment multiple regression analysis was used. The results showed that self-efficacy and job satisfaction are as high as organizational commitment. Independent variables based on organizational commitment. The dependent variable is the turnover-intention. Simple regression analysis showed that organizational commitment is as low as turnover-intention. Self-efficacy, job satisfaction and organizational commitment are different depending on individual traits and personal characteristics. Self-efficacy has been shown to have a positive relationship with job experiences, public work and turnover intention. Organizational commitment is also related with job experiences. However, there was no significant difference between job satisfaction, turnover intention and personal characteristics. Conclusions : According to the factor analysis of turnover intention, self-efficacy, job satisfaction, organizational commitment and turnover intention were correlated to each other. Self-efficacy, job satisfaction, and organizational commitment has a negative association with turnover intention.

• Journal of Korean society of Dental Hygiene
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• v.13 no.1
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• pp.45-60
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• 2013

Objectives : The number of North Korean refugees is remarkably increasing nowadays and there are many social and cultural issues related to their settlements in Korea. Stereotyping of group is generally unique and has influences on emotions and behaviors. The aim of this study was to investigate the relationship among stereotyping, emotion and service behavior of South Korean dentist towards North Korean refugee. Methods : Questionnaires for stereotyping, emotions and service behaviors were devised based on previous researches. Two-hundred and eighteen Korean dentists were randomly chosen and questionnaires were distributed. Correlation analysis, reliability analysis and primary component analysis were performed. Student t-test and one-way ANOVA were done to elucidate differences according to demographic factors. To examine the relationship among constructs, regression analysis was performed. Results : Stereotyping, emotions, and service behaviors are significantly related each other construct. South Korean dentists' stereotyping and emotions toward North Korean refugees are significantly different from those toward South Korean but service behavioral intentions were not different according to any demographic factor. Conclusions : The results imply that more contacts and education system are necessary to South Korean dentists to change their negative stereotyping and emotions toward North Korean refugees although their service behaviors are not affected at the moment.