• The Korean Journal of Applied Statistics
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• v.28 no.5
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• pp.859-870
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• 2015

Economic-traits of livestock are affected by environmental and genetic factors. We are interested in genetic factors that influence the economic-traits of Korean cattle. It is necessary to adjust environmental factors in order to enhance the accuracy of the genetic effect analysis. In this paper, we propose a statistical model of Korean cattle that exclude environmental breeding farm and age factors. We formulated an adjusted economic-trait value, and applied multifactor dimensionality reduction (MDR) method to data of before-and-after adjustment to identify major FABP4 genes. We were able to increase the accuracy of the analysis after adjustment and identify superior FABP4 genes that influence grade and fatty acid.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.7 no.2
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• pp.35-43
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• 1989

The improvements of highly accurate and dense control networks are major requirements to carry out numerical surveying and a large scale mapping for cadastral renovation. In the most conventional photogrammetric solutions, adjusted control coordinates have been applied to block triangulations. However, this study, imploying real data and those of simulated as well, contributes to a simultaneously combined adjustment. It also contains such photogrammetric as photocoordinates and geodetic observations like distances, angles and hight differences. Its purpose is to introduce the improved results, despite it is not sufficient for the ground network. In addition, through the detection of gross error, more precise observational data can be selected for the better adjustment. All in all, the result of this study can be summarized as follows : First, even if the ground control points are not sufficient nor existed at all, the combination of pbotogrammetric and geodetic observations are improved its accuracy. Secondly, the case #2 is more accurate than that of #3, and the case #7 comes into close to that of #6.

• Journal of the Korea Institute of Building Construction
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• v.13 no.3
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• pp.263-271
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• 2013

Change orders have been widespread in both the private and public construction sectors. In particular, in the case of G2B (Government to Business) contracts, adjustment of contract price and/or schedule extension is a frequent occurrence due to change orders. To uncover the causes of change orders and suggest an appropriate strategy, this study analyzed 296 cases of change orders in military facility construction projects from 2008 to 2010. The analysis revealed that the major causes of change orders are users' additional requirements (28.38%), a change of finishing materials (23.99%), and change of footing type (17.57%), in that order. Building on the results of this analysis, the authors suggest plans for practical improvements. Specific recommendations include 1) reflect user requirements at the early stage, 2) minimize the use of additional budget due to change orders, and 3) reduce the process and time for contract amendment, among others. The results of this study may provide significant implications to those involved in military construction projects, particularly project owners (i.e., the Ministry of Defense) and contractors.

• Journal of Engineering Education Research
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• v.15 no.4
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• pp.35-40
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• 2012

This study presents an analysis of the current situation (management, approach, adjustment, transportation, and others) of teaching portfolio by examining the teaching portfolio managers (staffs, researchers, teaching assistants, etc.) of 6 universities in the southeast of Korea. The rationale for the study focus is that the existing teaching portfolio either suffers a problem in the transportation, approach, adjustment and/or management or is likely to raise a problem in the future. In order to solve this problem, this study builds a web-based e-teaching portfolio. According to the analysis results, the engineering education system was established in all 6 universities (Ed- note that '6 universities' has already been specified as the study sample). The teaching portfolio was partially digitalized in this system, despite some problems of converting analog data into digital data, which induced difficulties in constructing the overall e-teaching portfolio. Therefore, this study focused on constructing an e-teaching portfolio without developing any additional system by using the existing system positively, and also on determining the appropriate components among the existing teaching portfolio components. Accordingly, in order to convert the analog data into the digital data required for this study, we used a digital camera as the conversion device and converted the teaching portfolio components into those appropriate for the e-teaching portfolio. Finally, we constructed an existing system appropriate for the e-teaching portfolio by using these devices and components.

• Journal of Labour Economics
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• v.34 no.3
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• pp.1-28
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• 2011

This paper empirically tests the theory that labor demand elasticity of unionized firms would be smaller than that of nonunionized firms, using the Korean firms' panel data for 1990-2009. The major findings are the following: First, the estimates of labor demand elasticity of unionized firms are in the range of 0.34-0.49, less than a half of those of nonunionized firms, hence supporting the theory. Second, the unionized firms are more rigid in dynamic adjustment of employment than nonunionized firms. Finally, there are no significant differences between unionized and nonunionized firms in the elasticity of substitution.

• Journal of Families and Better Life
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• v.28 no.5
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• pp.39-51
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• 2010

The purpose of this study was to investigate the moderating effect of adolescent's perception of interparental conflict and parental acceptance on psychological adjustments(self-esteem, depressive mood). Data were collected using self-administered questionnaire method with 554 middle and high school students. The major results of this research were as follows. First, there were significant differences in interparental conflicts, parental acceptance and psychological adjustments according to adolescents' sex and perceived level of living standard. Second, interparental conflict was negatively correlated with parental acceptance and self-esteem, and were positively related to depressive mood. Parental acceptance was positively related to self-esteem, and was negatively associated with depressive mood. Third, results of multiple regression analyis showed that both indices of psychological adjustments(self-esteem and depressive mood) were influenced by sex, perceived level of living standard, and parental acceptance. Specifically, the most powerful variable affecting psychological adjustments was parental acceptance. Finally, the parental acceptance moderated the influence of interparental.

• Human Ecology Research
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• v.52 no.6
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• pp.651-668
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• 2014

The main purpose of this study was to examine the relationship between social support, life satisfaction, and school-related adjustments of adolescents. The participants were 260 junior high school students (140 male and 120 female students) from the Seoul area. They completed questionnaires on social support, life satisfaction, and school-related adjustments. The collected data were analyzed using basic descriptive statistics, Pearson's correlation, and a multiple regression analysis. Baron and Kenny's method was used and examined, and the Sobel test was performed to determine the mediating model's significance. It was adapted to SPSS ver. 19.0 for Windows. The major findings were as follows: first, social support (parents/teacher/friend) was positively correlated with the adolescents' school-related adjustment. Second, the adolescents' life satisfaction was also positively correlated with the adolescents' school-related adjustments. In addition, social support was positively correlated with life satisfaction. It was further found that the adolescents' life satisfaction tended to play a perfectly/partially mediating role between social support and school-related adjustment; that is, social support (parents/teacher/friend) was shown to have not only a direct effect, but also an indirect effect through the adolescents' life satisfaction, on the school-related adjustments. These results clearly indicated that adolescents' life satisfaction plays a crucial role in the relationship between social support and the adolescents' school-related adjustments.

• Journal of Energy Engineering
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• v.25 no.4
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• pp.226-235
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• 2016

This study intends to present policy proposals to make the transition from policy adjustment system based on hierarchial authority to deal with energy policy to network establishment based on the central government, local government, industry and civic group, that can be converted into governance. To this end, the legal foundation to make the network-based policy adjustment for government's energy policy possible first. Second, contribution should be made to establish governance related to central government's energy policy. Third, contribution should be made to establish governance related to local government's energy policy. Based on this, this study intends to secure policy measures to establish and improve governance related to energy policy in Korea.

• Journal of Families and Better Life
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• v.9 no.1 s.17
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• pp.95-112
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• 1991

This study is planned to provide the basic idea to seek for the appropriate Time Management Strategies and to investigate the Time Management Strategies and household work time of wives. For these research tasks, the data are collected through the questionnaire rand 479 respondents were housewives in seoul. Their data are analyzed using Frequency, ANOVA, Pearson's Correlation Analysis, Simple Regression Analysis, Multiple Regression Analysis. The Major findings of this study were as follows ; 1) There are significant differences in the time management strategies according to housewife's age, education level, and employment status, children's number, the type of housing, the type family, income and sex role attitude. 2) There are significant differences in the household work time according to housewife's age, education level, employment status, family size, children's number, type of housing, income, sex role attitude and time pressure perceptibility. 3) The Household work time is found to be negatively correlated to the Time Management Stategies except the adjustment of leisure and sleep time. 4) The Household work time is significantly related to housewife's employment status and the adjustment of leisure and sleep time.

• The Korean Journal of Applied Statistics
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• v.25 no.1
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• pp.45-54
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• 2012

Published employment statistics do not provide enough information about the relationship of unemployment and economic and business conditions. This study investigates long-run equilibrium relations and short-run adjustment process of unemployment and discouraged unemployment with major price variables in the business coincident and lagging framework. Speed of adjustment from short-run disequilibrium to long-run equilibrium is found to be relatively faster for discouraged unemployment that appears more responsive to changes in most of explanatory variables. Discouraged unemployment is found to reflect reality and suggested to be a more meaningful statistical index.