• Journal of the Korean housing association
• /
• v.8 no.2
• /
• pp.107-112
• /
• 1997

This thesis is dealt with the thermal environment, the indoor air environment, the sound environment and the light environment in P.C apartment house. The purpose of this study is to analyze degrees of 'the cognition'. 'the importance', and ‘the satisfaction' on indoor environmental factors and to evaluate comfort of indoor environment based on residents' responses. The questionnaire survey was given to the residents at P.C apartment complex in Rowon-Gu, Seoul. The following are the results obtained in this thesis. The results of Path analysis on comfort revealed that factors of direct effect to comfort were the satisfaction on indoor air environment and sound environment and the cognition on indoor air environment and sound environment. The satisfaction on indoor air environment was the biggest variable which decided the comfort. By the survey of P.C apartment residents' responses, the level of P.C apartment indoor comfort was found uncomfortable. It is meaningful to su99est the model evaluating comfort by residents' responses .

• Journal of the Korean Society of Clothing and Textiles
• /
• v.24 no.8
• /
• pp.1137-1145
• /
• 2000

The questionnaire survey was carried out to analyze the difference of consumers perception on apparel products presented in catalog, cable TV home shopping program, and internet shopping site. 676 men and 728 women participated in this survey and they were members of catalog shopping or cable TV home shopping companies or netizen. The results of this study show that the shoppers perception on apparel home shopping differed by the direct shopping media that they frequently utilize and by their demographic characteristics. The cable TV home shoppers had higher reliability on product quality than the shoppers using paper catalog or the internet shoppers. The cable TV home shopping members perceived that the apparel products available in cable TV home shopping were diverse and the information about the products was sufficient to decide purchase. The married women tend to think that the TV home shopping program provides diverse apparel products in the aspects of color, design, size and the information about the materials including fabric.

• Journal of The Korean Society of Agricultural Engineers
• /
• v.60 no.6
• /
• pp.21-31
• /
• 2018

The result of examination of diagnostic method, which is composed of a combination of a thermal camera and a drone that visually shows the temperature of the object by detecting the infrared rays, for detecting the leakage of earth dam was driven in this research. The drone infrared thermography method was suggested to precise safety diagnosis through direct comparing the two method results of electrical resistivity survey and thermal image survey. The important advantage of the thermal leakage detection method was the simplicity of the application, the quickness of the results, and the effectiveness of the work in combination with the existing diagnosis method.

• Communications for Statistical Applications and Methods
• /
• v.8 no.3
• /
• pp.719-729
• /
• 2001

Overlap Maximization is a sampling technique to reduce survey costs and costs associated with the survey. It was first studied by Keyfitz(1951). Ernst(1998) presented a remarkable procedure for maximizing the overlap when the sampling units can be selected for two identical stratified designs simultaneously, But the approach involves mimicking the behaviour of nonlinear function by linear function and so it is less direct, even though the stratification problem for the overlap corresponds directly to the linear programming problem. furthermore, it uses the controlled selection algorithm that repeatedly needs zero-restricted controlled roundings, which are solutions of capacitated transportation problems. In this paper we suggest a comparatively simple procedure to use linear programming in order to maximize the overlap. We show how this procedure can be implemented practically.

• Journal of Nutrition and Health
• /
• v.30 no.5
• /
• pp.529-539
• /
• 1997

The present study was to formulate a computer program to provide a menu based on a food preference survey of families in urban areas. A food preference survey was conducted by individual direct interviews of infants, children and old people in this study. In case other's food preferences were available, food menus considering all age groups could be made. Database III PLUS package was utilized for this study. The dBASE was loaded with a food compostion table of 339 different food items, along with data for amino acids and fatty acids for 171 and 43 food items respectively. Food preference, unit of food, and recommended dietary allowances were also incloded. This meun program system calculates nutrients in selected foods, and menu assessment was composed of several factors inculding energy ratio of carbohydrate : protein : fat, amino acid score, limiting amino acid, polyunsaturated fatty acid/saturated fatty acid(JP/S) ratio and Ca/P ratio.

• Proceedings of the Korean Association for Survey Research Conference
• /
• 2006.12a
• /
• pp.67-83
• /
• 2006

In successive sampling on two occasions the problem of estimating a finite population quantile has been considered. The theory developed aims at providing the optimum estimates by combining (i) three double sampling estimators viz. ratio-type, product-type and regression-type, from the matched portion of the sample and (ii) a simple quantile based on a random sample from the unmatched portion of the sample on the second occasion. The approximate variance formulae of the suggested estimators have been obtained. Optimal matching fraction is discussed. A simulation study is carried out in order to compare the three estimators and direct estimator. It is found that the performance of the regression-type estimator is the best among all the estimators discussed here.

• The Korean Journal of Applied Statistics
• /
• v.17 no.2
• /
• pp.303-310
• /
• 2004

We suggest a method to procure information from the sensitive population which combine a direct survey method, BB and an indirect survey one, RRT, and a combined estimator that uses the stratified double sampling to estimate the sensitive parameter. We compare the efficiency of our estimator with that of Mangat and Singh model.

• Journal of the Korean Home Economics Association
• /
• v.40 no.5
• /
• pp.53-62
• /
• 2002

The purposes of this study were to examine: 1)the dimensions of online store attitude; 2)the differences in the online store attitude by product category and store type; and 3)the effects of online store attitude on store satisfaction and store loyalty. Data were obtained from an online questionnaire survey to 850 online shoppers who were randomly selected from the panel of an online survey agency, and 615 responses were analyzed. Factor analysis extracted 5 dimensions of store attitude including: process and security; service; promotion and presentation; price and quality; and merchandise. MANOVA revealed a significant difference in the price and quality factor by product category and store type. Multiple regression showed that the effects of price and quality, service, and process and security on store satisfaction were significant. Also, price and quality had a significant direct effect on store loyalty which was also affected by store satisfaction.

• Journal of Species Research
• /
• v.1 no.1
• /
• pp.87-99
• /
• 2012

Before the construction of Hantangang dam, we surveyed vertebrate fauna along the Hantangang River and collected samples. We collected 248 specimens (1,394 individuals) of 41 fish species from 10 families in four orders, including 17 endemic species and 5 endangered species. In our herpetofauna survey, we collected 47 amphibian samples of 10 species from 5 families in 2 orders, and 19 reptile samples of 5 species from 2 families in 1 order. We observed 25 species of bird (6 orders, 14 families) inclulding collection of 51 bird specimens (10 species from 5 families in 1 order). We collected 91 mammals of 6 species, and identified 7 species from field sign and direct observation from a total of 10 families in 5 orders. This collection and list comprise the final vertebrate faunal survey of the Hantangang region, and will provide basic scientific information for future research on conservation and restoration of the region.

• Journal of Distribution Science
• /
• v.18 no.7
• /
• pp.27-36
• /
• 2020

Purpose: The study examines how emotional leadership affects employee attitude towards work engagement. Leader legitimacy perception is chosen as the mediating variable to understand the effect of emotional leadership on employee work engagement. Research design, data and methodology: The research model is based on theory and empirical research findings in order to examine the mediating effect of leader legitimacy perception on the relationship between the manager's emotional leadership and employee work engagement. For this purpose, a survey was conducted among 188 employees of domestic retail distributors. Confirmatory factor analysis (CFA) and survey data confirmed the construct, and the hypothesis was tested by using structural equation modeling (SEM). Results: a) Emotional leadership has positive influence on leader legitimacy; b) Leader legitimacy is positively related to work engagement; c) Leader legitimacy mediates a positive relationship between emotional leadership and work engagement. However, there is no direct effect on work engagement (of employees) from emotional leadership standpoint. Conclusion: Based on the empirical results, implications and future research directions are discussed.