• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• 제22권4호
• /
• pp.100-106
• /
• 2008

Typical household load have nonlinear loads including a personal computer, video, refrigerator, microwave oven, TV, and audio set. These nonlinear loads generate harmonic currents and create distortions on the sinusoidal voltage of the power system. Harmonic field measurements have shown that the harmonic contents of a waveform varies with time. A cumulative probablistic approach is the most commonly used method to solve time varying harmonics. This paper provides in depth analysis on harmonics field measurement of the typical household loads and harmonics simulation using EDSA program for the case study.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
• /
• 제22권5호
• /
• pp.95-102
• /
• 2008

Typical household loads have nonlinear loads including a personal computer, video, refrigerator, microwave oven, TV, and audio set. These nonlinear loads generate harmonic currents and create distortions on the sinusoidal voltage of the power system. Harmonic field measurements have shown that the harmonic contents of a waveform varies with time. A cumulative probablistic approach is the most commonly used method to solve time varying harmonics. This paper provides in depth analysis on harmonics field measurement of the typical household loads for one year period and the survey is conducted with the objectives to identify the trends of harmonic distortion level present and indentify the future trends of metering in the presence of nonsinusoidal current and voltage waveforms in the system.

• Proceedings of KHEA Conference
• /
• 대한가정학회 1997년도 Program & Abstracts * The 7th Korea-Japan Home Economics Joint Syposium
• /
• pp.119-119
• /
• 1997

• Journal of Family Resource Management and Policy Review
• /
• 제13권3호
• /
• pp.103-122
• /
• 2009

The purpose of this study is to investigate what owners think of their housing and their community by scrutinizing households, thereby leading to a conclusion of how these communities have developed and the advantages they provide to their owners. This study was conducted by thoroughly interviewing one member from each of a total of 10 households living in apartments and villas in the Gangnamgu area of Seoul between August 5, 2008, and September 25, 2008. The results can be summarized as follows: First, all interviewees were female, within the range of 40 years to 50 years of age, and with high educational backgrounds. They were living in mid-level income or higher households but were characterized by frugal attitudes. Second, their households held a personal and familial meaning to them, one of providing replenishment, rest, and a place to share diverse feelings with their family. Certain factors such as being a convenient place for education, rising housing prices, a large area of greenery made possible by Yangjae Cheon, and so forth contributed to giving a special significance to their housings. The interviewees all thought the convenience of education and the rising housing prices in the Gangnam area were the most important factors. Third, the interviewees indicated the following sociocultural perspectives of Gangnam housings: They provide a good environment for education due to the densely clustered academies in the Daechi-dong area. There are many opportunities to meet neighbors with similar educational and economic backgrounds. There are vast areas of greenery such as Yangjae Cheon. There is access to highly advanced cultural and shopping facilities such as COEX, Seoul Arts Center, etc. There are no amusement centers located near the housing districts. There are convenient transportation methods and facilities. They are subject to jealous looks from people living outside the Gangnam area. Lastly, it seems that no significant community spirit exists among the dwellers of each apartment or villa. However, matters of self-interest such as construction problems, which contribute greatly to creating personal wealth, were exceptions when the dwellers united as a single household.

• Journal of the Korean Home Economics Association
• /
• 제36권5호
• /
• pp.125-135
• /
• 1998

The purpose of this study is to investigate the overall levels of the middle-aged employed men's attitudes toward retirement and plans for post-retirement life, and to explore the relative effects of personal, family, and job characteristics on retirement attitude and the level of retirement plan. The data were collected from the 438 middle-aged (ranging from 41 to 50) employed men through the structured questionnaires. The data were analyzed using frequency, percentile, average, standard deviation, and multiple regression analysis. The results of the data analysis show that most of the respondents had neither positive nor negative attitude toward retirement and the level of planning for post-retirement life was slightly higher than average score on the scale. Next, the positive attitudes of middle-aged employed men toward retirement were observed from those who have higher education, larger household income, higher job security and lower job stress respondents who hold professional, administrative, or official jobs were more positive toward retirement than those who hold professional, administrative, or official jobs were more positive toward retirement than those who hold manufacturing or sales job. A well-planned post-retirement life was found among those who have better health, higher job satisfaction, job security and job orientation. Job characteristic variables such as job security and job satisfaction showed stronger impact than personal or family ones on the attitude toward retirement and the level of retirement planning. Household income and health also had significant effects.

• Applied Chemistry for Engineering
• /
• 제9권7호
• /
• pp.985-989
• /
• 1998

In this study, removal efficiencies of pesticides on apples and peppers with water, dishwashing detergent, and alcoholic disinfectant were investigated by Gas Chromatography. Different conditions of pretreatment for increase of pesticide recovery were investigated for optimum condition. In our experiment, the supelco-STB-608 column and electron capture detector(ECD) were used to analyze pesticides residue. Removal efficiency of pesticide was in the order of alcoholic disinfectant>dishwashing detergent>water.

• Korean Management Science Review
• /
• 제32권3호
• /
• pp.13-28
• /
• 2015

Using the most recent dataset of Korea and U.S. household finance, this study analyzed demand and adequacy of private pensions for pre-retirees. For this purpose, 2013 Korean Retirement and Income Study (KReIS) of national pension research institute in Korea and 2013 SCF (Survey of Consumer Finances) of FRB in U.S. were used. For comprehensive comparisons of the two countries, this study classified the private pension into sub-categories such as personal pension, corporate pension, and retirement benefits, and used three different criteria including ownership, accumulated present value of each pension, and income replacement ratio of each pension. After controlling for other factors, educational level of householder and household income were critical determinants of size and adequacy of private pension in both countries. Different from Korean households, householders' gender, marital status, and health status had an important effect on the private pension size and adequacy in the U.S. In addition, home ownership significantly increased only private pension adequacy in Korea, and also increased ownership rate, size, and adequacy of private pension in the U.S. Results of this study provide useful implications for future pension system and policy in Korea.

• Korean Journal of Human Ecology
• /
• 제7권2호
• /
• pp.23-34
• /
• 1998

The purpose of this study was to examine the awareness and the behavior of adolescents about consumption. Two-hundred students attending in high school were selected, and surveyed using questionnaires. Among them, 196 students were used in statistical analyses, with frequency, percentage, mean, correlation analysis, and regression analysis in SPSS/PC+ program. The results were as follows: the levels of the awareness and the behavior of adolescents about consumption in each of purchase, use and disposition steps were more or less middle in terms of rationality or soundness. The correlations between the awareness and the behavior on conspicuous-consumption and between the awareness and the behavior of imitated-consumption in a purchase step were negatively siginificant, and the correlation between the awareness and the behavior on product frugality in a use step was positively significant. In a purchase step, the conspicuous-consumption behavior was affected by the conspicuous-consumption awareness and sex, while the imitated-consumption behavior was affeted by the imitated-consumption awareness, sex and monthly household income. The consumption behavior on product frugality in a use step was affected by its' awareness, monthly household income, and personal expense management. The environment conservation behavior in a disposition was influenced only by monthly personal expenses.

• The Research Journal of the Costume Culture
• /
• 제27권6호
• /
• pp.569-581
• /
• 2019

This study investigated differences in cosmetic buying behavior and personal characteristics between cosmetic involvement groups. Cosmetics buying behavior refers to reason for using cosmetics, use of information sources, selection criteria, place of purchase, use/non-use of cosmetics, purchase propensity, purchase frequency, purchase amount, and satisfaction with cosmetics. Personal characteristic contains pursuing image, age, residence area, job, and average household monthly income. Data was collected from 5-10 December 2016, from 308 females in their 20s using an internet survey. The analysis included descriptive statistics, t-tests, Mann-Whitney U tests, and chi-square tests. The respondents were divided into two groups (a high cosmetic involvement group and a low cosmetic involvement group) according to the degree of cosmetic involvement. The results of t-tests revealed significant differences between groups in terms of reasons for using cosmetics, use of information sources, selection criteria, purchase frequency, place of purchase, use/non-use of cosmetics, and satisfaction with cosmetics. The results of Mann-Whitney U tests highlighted a significant difference in purchase frequency between both groups. The results of chi-square tests indicated significant differences in purchase frequency, purchase amount, pursuing image, and average household monthly income. However, no significant differences were evident in terms of purchase propensity, age, job, and area of residence between groups.

• Nutrition Research and Practice
• /
• 제2권2호
• /
• pp.93-99
• /
• 2008

A community-based longitudinal study was conducted in the Manya Krobo District of the Eastern Region of Ghana with the objective of assessing how caregiving practices influence nutritional status of young children in Ghana. The study subjects were one hundred mothers with infants between the ages of 6 and 12 months. Each child was visited at home monthly for a period of six months. On each visit, information was collected on caregiver household and personal hygiene, child's immunization status, child's dietary diversity, caregiver responsiveness during feeding, caregiver hygienic practices related to feeding and child's weight and length. At the end of the study, summary scores were generated for each variable and quality of care practice determined based on their distribution. Classification of child nutritional status was based on z-scores for both weight-for-age and length-for-age. The results revealed that caregivers who exhibited better quality of care practice had well-nourished children. Such caregivers were more likely to practice good household and personal hygiene than those of poorly nourished children (97.1% vs 31.8%, p<0.001). They were also more likely to complete their children's immunization schedules (88.2% vs 62.2%, p<0.001), provide good quality diets from highly diversified sources (79% vs 23%, p<0.001), exhibit high responsiveness during feeding (100% vs 22.7%, p<0.001) and feed under hygienic conditions (100% vs 22.7%, p<0.001). Based on the findings it was concluded that good caregiving practices are associated with improved child nutritional status.