• Korean Journal of Child Studies
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• v.30 no.4
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• pp.173-189
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• 2009

This study investigated contextual characteristics and developmental functions of time spent alone in early adolescence. Participants were 107 6th grade elementary school students. The Experience Sampling Method was used to measure experiences of time spent alone. Findings were that : (1) 2.6% of an early adolescents' daily waking time was involuntarily spent alone and 14.8% was voluntarily spent alone. (2) Psychological states of voluntary time spent alone were more positive than those of involuntary time spent alone, and psychological states of voluntary time spent alone were not significantly different from those of time spent with family members or friends. (3) Experiences during voluntary time spent alone were related to adjustment, suggesting that time spent alone during early adolescence contributes to positive development.

• Korean Journal of Rural Living Science
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• v.9 no.1
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• pp.67-78
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• 1998

This study compared the pattern of couples' time-use in rural areas. Wives' and husbands' time spent in household work, leisure, and agricultural labor were compared. In addition, this study examined what factors determine the amount of time of couples spent in such activities. According to the results, in general, the pattern of couple's time-use in rural area was different. Regarding the pattern of time-use, three major results could be mentioned. First of all, husband in rural area spent most agricultural labour time in busy farming season. And then husband spent much time in leisure activities and wife spent in household work. Second, wife spent more time in inactive leisure and husband spent more time in active leisure. Third, husband in rural area spent less time in household work. In particular. they spent less time in female-typed work than male-typed work. To examine what factors determine the extent of time spent in such activities, three theories were employed and tested. According to the results, the models employed in this study were realistic in explaining the amount of time of couple in rural area, and more adjustable wife than husband. In conclusion, a combination of the multidimensional theoretical perspectives used in this study helpfully explains the variation in the amount of time-use of couple in rural area.

• Korean Journal of Community Nutrition
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• v.11 no.6
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• pp.695-706
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• 2006

This study was to investigate the relationship between time spent on lunch and degree of obesity, eating habits in culinary college male students. This survey was conducted using questionnaires for 106 male students in a Hongseung-located culinary college. Over 16 minutes of time spent on lunch group had significantly lower body weights, obesity degrees and body mass index (BMI) and tended to have lower body fat % than the other groups. It suggests that shorter time spent on lunch is related with lower body weight, obesity degree and BMI. Those who ate the meal prepared by mother had longer time spent on lunch. The shorter times spent on lunch group recognized their body shape was lean, the longer time spent on lunch group recognized the overweight or obesity significantly. The shorter time spent on lunch group tended to eat the cooked rice in the gug and recognized that they were not healthy. Those who had diseases in the past tended to have shorter time spent on lunch. The more they chewed cooked rice and then longer time spent on lunch they had, they recognized their eating speed was not significantly speedy. The shorter time spent on lunch they had, the fewer fruits and salty foods they ate significantly. This study suggests that more chewing time. slower eating speed and longer time spent on eatmg lunch is very related with lowering weight, BMI, body fat % and obesity degrees, so male college students should be educated to have correct eating habits.

• Journal of Families and Better Life
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• v.34 no.3
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• pp.27-43
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• 2016

This study aims to better estimate the amount of time spent for child care and to understand the characteristics of time spent for child care among employed and non-employed mothers with children under age 6 by taking concurrent activities into account. To assess time spent for child care, I differentiate child care activities into three types: primary activity without concurrent activities, primary activity with concurrent activities, and secondary activity with concurrent activities. The Major results of this study are as follows: First, employed mothers spent 145 minutes less than non-employed mothers in the total amount of time spent for child care during weekdays and this difference diminished to 62 minutes on weekends. Specifically there were differences in all types of time spent for child care among employed and non-employed mothers during weekdays, while the difference was only significant in the average amount of primary time spent for child care without concurrent activities on weekends. Second, there was no difference in the average ratio of time spent for child care with concurrent activities among employed and non-employed mothers during weekdays. By contrast, the average ratio of time spent for child care with concurrent activities of employed mothers was 5% higher than non-employed mothers on weekends. Lastly, the highest concurrent activity with child care activities was leisure followed by housework. This means that child care, leisure, and housework are somewhat related to each other among mothers.

• The Korean Journal of Community Living Science
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• v.16 no.1
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• pp.3-14
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• 2005

The importance of time grows greater these days. For that reason, much research has been conducted to investigate time use. In particular, time spent in housework has been a focus in the human ecology. This study aimed to look into the field of research about time spent in housework from 1991 to 2004. To conduct the inquiry, 35 research projects were analyzed by subject. It turned out that most of the research studied the actual state of time use and related variables. Secondly, the research was classified by the measurement method, such as who wrote the time log or questionnaire, what type of response the researcher wanted and what kind of recording method was used. In 30 research projects, respondents wrote in their time logs and questionnaires by themselves. A few research projects presented certain types of behavior as examples of the actions in everyday life. For the recording method, 22 of the projects employed the time log method and 11 used questionnaires. Thirdly, all the research was categorized by the respondent of each project. 14 projects were targeted .at housewives and 14 were for married couples. Lastly, the definition of time spent in housework was used to consider these 35 studies. Most of the research studies defined the 'time spent in housework' as the total amount of the time spent in eating, clothing, housing, family care and household management.

• Journal of the Korean Home Economics Association
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• v.48 no.6
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• pp.43-56
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• 2010

This study explored time-use patterns of young children and compared the patterns according to mother's employment status. Using 6718 time diaries of 3359 children under age 5, as reported by their mothers, this study examined (1) the proportion of children who spent time on certain activities and the amount of time they spent on each activity for a weekday and a weekend day and (2) the proportion and the amount of time that children spent with certain adults. Compared to children with unemployed mothers, children with employed mothers spent more time during weekdays in child care centers and less time sleeping. These children also spent more time on education during weekends. The proportionate and actual times children spent with various adults also differed by the mother's employment status. Those with employed mothers spent less time with their mothers and more time with other relatives or teachers on weekdays. These results indicate that maternal employment corresponds with differing timeuse patterns from children's early life stages.

• Asian-Australasian Journal of Animal Sciences
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• v.33 no.1
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• pp.177-185
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• 2020

Objective: The study was conducted to establish a relationship between inclusion level of Vachellia tortilis (V. tortilis) leaf meal and time spent on different behavioral activities by finishing pigs. Methods: A total of forty-eight male Large White×Landrace finishing pigs with a mean (±standard deviation) body weight of 63.8±3.28 kg aged 14 wks were assigned to individual pens in a completely randomized design. Pigs were fed on diets containing 0, 30, 60, 90, 120, and 150 g/kg dry matter of V. tortilis leaf meal ad libitum with fresh water provided throughout the trial. There were eight pigs in each experimental diet. The behavior of pigs was observed for three wks twice a wk from 0600 to 1800 h using six closed circuit television cameras. Results: Increasing levels of V. tortilis leaf meal caused a linear decrease (p<0.05) in time spent eating, lying down and the number of visit to the feeder. Time spent standing and biting objects increased linearly (p<0.05) with increasing inclusion level of V. tortilis leaf meal. The was a negative linear relationship (p<0.05) between condensed tannins versus time spent eating, lying down and number of feeder visits. Condensed tannins showed a positive linear relationship (p<0.05) with time spent standing and biting objects. Neutral detergent fiber caused a linear decrease (p<0.05) in number of feeder visits, time spent eating, time spent standing. Conclusion: Inclusion level of V. tortilis leaf meal reduces time spent eating, lying down and the number of feeder visit while prolonging time spent standing and biting of objects. Condensed tannins and dietary fiber are among nutritional factors affecting behavioral activities displayed by finishing pigs.

• Journal of Radiation Protection and Research
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• v.36 no.4
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• pp.174-182
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• 2011

With the reactor operation conditions - 4.3 wt% $^{235}U$ initial enrichment, burn-up 55,000 MWd/MTU, average power 34 MW/MTU for three periods burned time for 539.2 days per period and cooling time for 100 hours after shut down, to set up the condition to determine the minimum height (depth) of spent fuel storage pool to shut off the radiation out of the spent fuel storage pool and to store spent fuels safely, the dose rate on the specific position directed to the surface of spent fuel storage pool induced by the neutron and gamma-ray from spent fuels are evaluated. The length of spent fuel is 381 cm, and as the result of evaluation on each position from the top of spent fuel to the surface of spent fuel storage pool, it is difficult for neutrons from spent fuels to pass through the water layer of maximum 219 cm (600 cm from the floor of spent fuel storage pool) and 419 cm (800 cm from the floor of spent fuel storage pool) for gamma-ray. Therefore, neutron and gamma-ray from spent fuels can pass through below 419 cm (800 cm from the floor) water layer directed to the surface of spent fuel storage pool.

• Journal of the Korean Home Economics Association
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• v.19 no.2
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• pp.73-85
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• 1981

The present trend is to classify time as a human resource. Time is considered as a human resource and refers not only to "clock time" that man possesses in equal amounts, but also to person's characteristic methods of assimilating and perceiving the passage of time. People differ in their ability to gauge the passage of time or to estimate the amount of time that an activity will take. The time used for household work by homemaker was analysed in that viewpoint. Specially the aim of this study was to find and analyse any differences from the style of house, the kind of fuel for cooking, the system of the family, the age and educated degree of homemaker and income degree. For analysis useable responses of 247 returned were used. The conclusion is as follows. 1. Homemakers spent 11.8∼13.4 hours for household work for a day. 2. Husband contributed 1∼1.4 hours, daughters and sons 0.6∼2.4 hours for household work a day. 3. There were large differences of the time spent on all food activities and care of clothes by the style of house and kitchen and the kind of fuel for coking. 4. The homemaker who has many children and preschool children spent much time for preparing the meal and care of clothes than others. 5. High educated homemaker spent less time for household work than others. 6. There are not any differences between time spent and income. 7. There are not also differences between time spent and having household equipment. It is assumed that many household equipment in the house aren't used effectively.

• International Journal of Human Ecology
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• v.16 no.2
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• pp.45-61
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• 2015

This study examines the effects of time spent with parents and peers on generational differences in children's externalizing behavior problems in immigrant families. Using the Child Development Supplement and Time Diaries from the Panel Study of Income Dynamics, we found that first and second generation children exhibited fewer externalizing behavior problems than did third generation children, despite their lower socioeconomic status. First and second generation children spent more time with either one or both parents, and less time with peers, on the weekend day than did third generation children. We found a marginal but beneficial effect of time spent with fathers on the weekday, but not on the weekend day. The implications are that time spent with fathers on weekdays differs from time spent with fathers on the weekend, and that promoting immigrant father involvement on the weekday through school or community programs could benefit immigrant children.