• Journal of the Korean Data and Information Science Society
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• v.23 no.2
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• pp.375-383
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• 2012

The purpose of the ensemble methods is to increase the accuracy of prediction through combining many classifiers. According to recent studies, it is proved that random forests and forward stagewise regression have good accuracies in classification problems. However they have great prediction error in separation boundary points because they used decision tree as a base learner. In this study, we use the kernel ridge regression instead of the decision trees in random forests and boosting. The usefulness of our proposed ensemble methods was shown by the simulation results of the prostate cancer and the Boston housing data.

• The Korean Journal of Applied Statistics
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• v.25 no.6
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• pp.933-945
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• 2012

In this paper we used the KLIPS(Korean Labor and Income Panel tudy) data that surveyed from 2006(wave 9) to 2009(wave 12). Other previous studies are concerned with the panel attrition in the early wave, but this study classifies the response pattern and investigates some factors that influence panel attrition when the panel tends to stabilize. It was revealed that panel attrition was influenced by relocation and housing type through the logit model. Besides it was appeared that panel attrition was affected by the monthly living expenses and the overall household income through the decision tree.

• Fire Science and Engineering
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• v.5 no.3
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• pp.23-30
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• 1991

One of the most serious national problems is the shortage of houses, especially in great cities. Housing shortage resulted from an overpopulated city brought the high-rise apartment buildings. While these buildings provide city-dwellers with much more houses, they have the basic fire safety problem in proportion to their heights. In these respect, this study aims to present the basic data for the fire safety design of high-rise apartment buildings. In this study, national fire damage statistics of past eleven years were investigated and the problem of the fire safety design of high-rise apartment buildings was studied through the methods of questions, observations and records on the representative six high-rise apartment buildings in seoul.

• Human Ecology Research
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• v.57 no.2
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• pp.213-224
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• 2019

This study investigates the effect of depressive vulnerability on the interpersonal problems of university students. We explore the moderating effects of ego-resilience on the relation between depressive vulnerability and interpersonal problems. We selected 380 university students as participants from Daegu and Gyeongsan cities. Collected data was analyzed by descriptive statistics, Pearson's correlation, moderating effect with SPSS 23.0. PROCESS, a SPSS macro program developed by Hayes (2013). The findings are as follows. First, there were significant correlations between non-sociability and dependency, self-criticism, non-self-assertiveness, over-consideration, dominance, personal relations, emotion control, and optimism. Second, ego-resilience was found to moderate the relationship between depressive vulnerability and non-self- assertiveness, over-consideration, and dominance among university students. This study suggests that intervention to address ego-resilience are important to resolve the interpersonal problems of university students.

• Journal of the Korean Home Economics Association
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• v.35 no.3
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• pp.287-305
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• 1997

The purpose of this study was to analyze a causal effect on the housewife's leisure activity participation, leisure expenditure and leisure life satisfaction. Data was collected 249 housewives in Pusan. Data were analysed using descriptive statistics, one-way Anova, multiple regression, Pearson's correlation and path analysis. The main findings of the research were as follows: First, there were significant differences in leisure activity participation according to socio-demographic and economic variables. Physical type showed significant differences when housewife was 30's and unemployed, size of family was 3 and 4, age of the lastborn child was under 6, occupation of husband was professionals and technicians, educational attainment of housewife was under highschool graduate, pattern of housing was collective, income was higher. There were significant differences that occupation of husband was professionals and technicians, educational attainment of housewife was over junior college graduate, pattern of housing was collective, income was higher in self-developing type. restful type showed significant differences when housewife was 40's, age of the lastborn child was under 13-18, educational attainment of housewife was under highschool graduate. There were significant differences that housewife was unemployed in home-oriented type. There were significant differences that housewife was 30's and unemployed, size of family was 4, age of the lastborn child was under 6, occupation of husband was market and sales worker, educational attainment of housewife was over junior college graduate, pattern of housing was collective in time-spending type. Second, there were significant differences in leisure time, leisure expenditure and leisure life satisfaction according to socio-demographic and economic variables. Leisure time showed significant differences when housewife was unemployed, age of the lastborn child was under 13-18, occupation of husband was service, educational attainment of housewife was under highschool graduate, income was higher. Leisure expenditure showed significant differences when housewife was 30's, size of family was under 3, age of the lastborn child was under 6, occupation of husband was senior officials and manager, educational attainment of housewife was over junior college graduate, pattern of housing was collective, income was over 5,000,000 won. There were significant differences that housewife was unemployed in leisure life satisfaction. Third, casual effect was path analysed according to path model. Employment and unemployment of housewife, income and occupation of husband (product & transport equipment operator) had an effect on phycial type. Age of housewife, employment and unemployment of housewife and occupation of husband (product & transport equipment operator) had an effect on children-concerned type. Age of housewife had an effect on social-concerned type. Education of husband, income, age of lastborn child and occupation of husband (professor and teacher) had an effect on self-developing type. Age of lastborn child, employment and unemployment of housewife and occupation of husband(product & transport equipment operator) had an effect on children-concerned type. Age of lastborn child and children number had an effect on religious-social type. Employment and unemployment of housewife had an effect on home-oriented type. Age of housewife, education of husband had an effect on time-spending type. Restful type, employment and unemployment of housewife, and occupation of husband(service) have an effect on leisure time. Income, leisure time, self-developing type, children concerned type and occupation of husband(senior officials and manager) had an effect on leisure expenditure. Leisure expenditure, self-developing type, employment and nemploymentof housewife, income had an effect on leisure life satisfaction.

• Journal of the Korean Data and Information Science Society
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• v.25 no.6
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• pp.1361-1369
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• 2014

This research is for analyzing the change rate of housing rent price index produced by KAB (Korea Appraisal Board) in the monthly periodical, Survey on Housing Monthly Rent. The index is a very important and useful indicator to understand and diagnose the house rental market. However, the index is criticized in that it tends to decline when the price level of Jeonse (i.e., a typical type of dwellings in Korea, generally leased on a deposit basis for 1 or 2 years) is highly going up, which is inconsistent with the actual economic sentiment of tenants. We verify the reason why such phenomenon occurs and suggest a simple but novel method to analyze properly the change rate of the index. The main findings are as follows. The key factor to trigger the problem is the use of the conversion rate for Jeonse-to-monthly rent for constructing the rent price indexes. We separate the effect of the conversion rate out of the change rate of the index and quantify the adjusted real change rate showing an increase of the rent price level which is masked by the conversion rate before.

• Fire Science and Engineering
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• v.29 no.1
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• pp.38-44
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• 2015

This study suggested the problems and their improvement measures for the operation of fire detectors and sprinkler heads installed at apartment houses. According to a census on population and housing in 2010, apartment houses account for 71.6% of the total housing facilities. And by fire statistics data of the National Emergency Management Agency, approximately 25.0% of fire accidents and 46.4% of casualties occur at apartment houses every year. Therefore, this study conducted for identifying the causes and characteristics of fire to establish the fire safety improvement measures for apartment houses. And this study was carried out virtual fire simulation at domestic apartment houses. The scenario of the simulation contains a comparative analysis on the operation time of standard sprinkler heads and residential sprinkler heads, heat detectors and smoke detectors. As a result of simulation, it was found that standard sprinkler heads and heat detectors installed at the existing apartment houses should be replaced with residential sprinkler heads and smoke detectors for rapid fire suppression. In addition, sprinkler systems should be considered to be installed for excluded floor at apartment houses. Especially, it is necessary to construct remote inspect systems like advanced countries for efficiency of apartment houses safety management.

• Women's Health Nursing
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• v.7 no.2
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• pp.157-168
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• 2001

The purpose of this study was to investigate of the relationship of the urinary incontinence, menopausal symptom and life satisfaction in middle aged women. The subjects of this study were 235 middle aged women, living in M city, during the period from June 21 to August 31, 2000. The instruments for this study were the urinary incontinence modified and adding by Lee Young Sook(1994), the menopausal symptom developed by Song Ae Ri and Chung Eun Soon(1998) and the life satisfaction translated and modified by Suh Kyung Hee(1988). Collected data were analyzed using descriptive statistics, t-test, ANOVA, Pearson correlation coefficients and stepwise multiple regression with SAS package. The result of this are as follows : 1. The total mean score of urinary incontinence was $1.56{\pm}0.58$ with a range of 0 to 4. The mean score on the menopausal symptom was $2.05{\pm}0.43$ with a range of 1 to 4. The mean life satisfaction score was $1.14{\pm}0.41$ with a range of 0 to 2. 2.General characteristics ralated to urinary incontinence were age and numbers of children (F=7.66, p=0.000, F=2.86, p=0.037). General characteristics ralated to menopausal symptom were age (F=7.37, p=0.000), occupation (t=5.33, p=0.021), problem of children (t=6.46, p=0.011) and marital satisfaction (F=5.65, p=0.004). General characteristics ralated to life satisfaction were type of housing (t=12.06, p=0.000), problem of children (t=6.96, p=0.008) and marital satisfaction (F=18.86, p=0.000). 3.The urinary incontinence and menopausal symptom were correlated positively (r=.235, p=.000). The urinary incontinence and life satisfaction were correlated negatively (r=-.114, p=.007). The menopausal symptom and life satisfaction were correlated negatively (r=-.277, p=.000). 4.The menopausal symptom, type of housing and marital satisfaction explained 16.6% of the variance for life satisfaction in the middle aged women.

• Journal of Family Resource Management and Policy Review
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• v.20 no.1
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• pp.43-60
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• 2016

The purpose of this study was to investigate what life safety services the elderly living alone in rural areas need and to propose the life safety services that they actually need. The research subjects were 1,000 people aged 65 years and over living in the rural areas of Korea. Among the total 1,000 respondents, 283 elderly people who did not live together with their married children were included in this study. Data were analyzed through frequency analysis, descriptive statistics, and multiple regression analysis. The results of this study were as follows. First, the needs of health care services and vehicle support services (when the elderly went to the hospital or walked out) were high. These were services related to health, which means that the health of the elderly is not good and that they are interested in health. Of course, it is important to treat the disease. However, it is more important to prevent disease and maintain health. An expansion of these services is urgently needed. Second, the need for life safety services was affected by the frequency of contact with neighbors, uncomfortable housing, exercise, the frequency of contact with children, gas accidents, and nutrition variables. Through this analysis, we propose to include the housing improvement service, nutrition improvement services, and expanding social relations services in the life safety services.

• The Korean Journal of Community Living Science
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• v.27 no.4
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• pp.831-850
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• 2016

The ratio of suicide among the elderly in Korea has nearly tripled within the last 20 years. With this in mind, this study examined the effects of social exclusion on depression and suicidal ideation among the elderly living in elderly-only households with a focus on gender differences. Social exclusion is composed of economic, health, housing, education, social participation, and relational aspects. For this study, data were gathered from 527 participants aged 65 years and over. The statistical methods used for data analysis were descriptive statistics, chi-square test, t-test, and hierarchical regression analysis with the SPSS Win 20.0 program. The results of this study are summarized as follows: First, more than 80% of the elderly experienced social exclusion. Women were shown to be more vulnerable than men in terms of housing exclusion, educational exclusion, health exclusion, and multiple exclusion, whereas men were more vulnerable than women in terms of social participation exclusion. Second, social exclusion had significant effects on suicidal ideation among the Korean elderly. We also observed gender differences in the results. Regression analysis of suicidal ideation showed that relational exclusion had a significant effect on suicidal ideation in men, whereas health exclusion had a significant effect on suicidal ideation in women. Results of the study show that stronger social support networks and policies focusing on the elderly are needed in order to reduce elderly suicide in Korea.