• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.10
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• pp.280-289
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• 2018

This study investigated the effects of spousal intervention in housework on female depression. To achieve this, an empirical 10-day field survey of 119 mothers of children after school age was conducted in Suwon, Incheon, Yeoju and Gwangju, Gyeonggi-do through structured questionnaires. The findings were as follows. Spousal intervention in housework had a significant effect on female depression, but there were different prevalence rates of female depression according to the status of spousal childcare on weekdays and weekends. In other words, there was a difference in the effects of spousal intervention in housework on female depression according to weekday childcare and weekend childcare. These findings indicate that reducing housework burdens by spousal intervention in housework helps to lower and prevent female depression. Consequently, because there is a difference in the effects of spousal intervention in housework on female depression according to the level of simple weekday or weekend childcare and the degree of intervention, spousal intervention and sharing all family management duties, including housework and childcare, can maximize the effect.

• Journal of the Korean Geographical Society
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• v.32 no.2
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• pp.217-228
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• 1997

A Study on individual Characteristics and Daily Activities of Housewives in the City of Kwangju. This study examines housewives' daily activities, focusing upon individual characteristics. The data used in this study are based on the fuestionaire survey, asking of personal trip for the weekdays and the weekend. Daily activities are classified into 7 categories and individual characteristics are revealed by age, occupation, a degree of education, number of family, and the residential environment. The results of this study are as follows: 1) The relations between daily activities and individual characteristics are influenced by housewife's occupation. Daily activities of housewives who have jobs are different from those who do not have jobs for a weekday as well as for a weekend. 2) Housewives' daily activities show very busy and vigorous on Saturday. 3) Housewives who are employed are willing to make mutipurpose trips on Saturday. 4) For a weekday, housewives' daily activities are inclined to make one cycle trip in a day, and the more trip cycles are, the more multipurpose trips are made. 5) The relationships between daily activities and individual characteristics show the pattern of WH, WLH, LHLH as it can be grouped.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.14 no.4
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• pp.18-26
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• 2015

This study is a fundamental research to suggest a forecasting model for short-term railway passenger demand focusing on major lines (Gyeungbu, Honam, Jeonla, Janghang, Jungang) of Saemaeul rail and Mugunghwa rail. Also the author tried to verify the potential application of the proposed models. For this study, SARIMA model considering characteristics of seasonal trip is basically used, and daily mean forecasting models are independently constructed depending on weekday/weekend in order to consider characteristics of weekday/weekend trip and a legal holiday trip. Furthermore, intervention events having an impact on using the train such as introduction of new lines or EXPO are reflected in the model to increase reliability of the model. Finally, proposed models are confirmed to have high accuracy and reliability by verifying predictability of models. The proposed models of this research will be expected to utilize for establishing a plan for short-term operation of lines.

• Journal of Digital Convergence
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• v.16 no.12
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• pp.383-393
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• 2018

The purpose of this study was to examine impact of multi-cultural family on subjective health status, mental health and internet addiction tendency compared to general family in Korean adolescent. The data were derived from the 13th Korea youth risk behavior web-based survey 2017 in Korea and analyzed considering complex samples analysis. The subjects were general families 61,320(98.5%) and multi-cultural families 956(1.5%). Multi-cultural youth had higher rates of unhealthy and unhappy and the percentage of depression, suicidal ideation, weekday and weekend smartphone overdependence, experience problems with using smartphone in friend than general youth. In addition, suicidal ideation 1.270 times, weekday and weekend smartphone overdependence 1.359 times and 1.297 times respectively and experience problems with using smartphone in friend 1.603 times was increased in multi-cultural youth compared to general youth. Therefore, it is very meaningful that this study provided basic data of intervention program to improve mental health and internet addiction tendency of multi-cultural youth.

• Journal of the Korea Safety Management & Science
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• v.24 no.2
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• pp.41-50
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• 2022

The food delivery platform labor market has been continuing to grow rapidly in Korea, which resulted in traffic accident increases of delivery riders. To prevent traffic accidents while delivery, this study conducted a survey for 462 delivery riders and analyzed the statistical relationships of delivery characteristics and risk perception with delivery accidents. The results of this study revealed that riders with young age (20s: 46.6%) and/or low delivery experience (less than 1 year: 50.6%) had significantly higher proportion of accident experience than other age groups (over 40s: 36.2%) and high delivery experience (more than 2 years: 36.4%). In addition, side job riders (61.5%) showed significantly higher proportion of accident experience than main job riders (39.1%). The riders with accident experience had more number of deliveries per hour (weekday: 3.56, weekend: 3.91) than the riders without accident experience (weekday: 3.29, weekend: 3.68). Lastly, the riders with accident experience rated significantly higher perceived level of risk on weather, violation of traffic laws, uninspected motorcycle, receiving calls while driving, missing safety training, missing personal protective equipment than the riders without accident experience. This study suggested four aspects based on the study results to prevent traffic accidents for delivery riders.

• Sleep Medicine and Psychophysiology
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• v.20 no.2
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• pp.69-74
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• 2013

Introduction: Although it is well known that medical students are not getting an adequate amount of sleep, there have been only a few studies on the sleep patterns of medical students and the related factors. Therefore, the present study aimed to investigate the medical students' sleep patterns and the related factors. Methods: A questionnaire package was administered to the $1^{st}$ to $4^{th}$ year medical students at one medical school. It consisted of questions asking about their lifestyles as well as Pittsburgh sleep quality index (PSQI), Epworth sleepiness scale (ESS), global assessment of recent stress scale (GASS), the center for epidemiologic studies-depression scale (CES-D), and Moudsley obsessive-compulsive inventory (MOCI). A total of 352 students (206 males and 146 females) responded to the survey and the result was analyzed using the independent t-test, the chi-square test, the paired t-test, Pearson's correlation and ANOVA. p-values of less than 0.05 were considered statistically significant in analyses. Results: The weekend bedtime was significantly delayed (0 : 49 on weekday ; 1 : 34 on weekend ; t=-5.23, p<0.001), the weekend rise time was delayed (6 : 58 on weekday ; 9 : 30 on weekend ; t=-24.48, p<0.001) and the total sleep time was increased on weekends (5 : 36 on weekday ; 7 : 39 on weekend ; t=15.94, p<0.001). The PSQI score of all subjects was 6.43{\pm}2.64. PSQI was positively correlated with ESS (r=0.383, p<0.001), GASS (r=0.326, p<0.001), CES-D (r=0.393, p< 0.001), and MOCI (r=0.247, p<0.001), but not with GPA (r=0.072, p=0.228. The more senior students had lower PSQI, GASS, CES-D, and MOCI score (p<0.05). Conclusion: Medical students were experiencing a lack of sleep during weekdays as they have a later bedtime and earlier rise time, and consequently had more hours of sleep on weekends. Overall, the medical students were experiencing poor sleep quality and sleep deprivation. Poor sleep quality is associated with psychological problems (daytime sleepiness, stress, depression, and obsessive tendency).

• Journal of the Korean Institute of Landscape Architecture
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• v.48 no.1
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• pp.1-14
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• 2020

Various policies and studies regarding use of PBSS (Public Bike Sharing System) and Programs (PBSP) have been conducted worldwide as the number systems or programs has increased. Although various phenomena and demands have been generated by the use of PBSS in everyday life, the majority of research and the policies in South Korea have been implemented focused on commuting life. The purpose of this study aimed to understand various PBSS demands using PBSS usage data in 2018 in the Yeouido districts through classifying usage patterns and analyzing features. The rental stations were classified into three types based on weekday/weekend usage rates. The usage of Yeouido's PBSS accounted for 4.3% of the total usage in Seoul Metropolitan City, while the number of PBSS rental stations accounted for 2% of all rental stations in the Seoul urban areas. Rental stations with a higher weekday utilization rates showed high utilization rates in all four seasons and were mainly distributed in work and residential areas. Other stations showed a concentrated usage pattern in spring (April-May) and autumn (September-October) seasons, and their locations were close to the entrance of nearby parks. Besides, renting and returning were often concentrated at certain rental stations for high weekend utilization as compared to the pattern of high weekday usage. Therefore, PBSS management and programs should be operated to reflect various usage demands rather than uniform PBSS operations. The result of this study is meaningful to provide basic data for effective PBSS operation by monitoring the demand for PBSS usage in spatio-temporal terms.

• Journal of Korean Academy of Nursing
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• v.40 no.1
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• pp.43-51
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• 2010

Purpose: The purpose of this study was to investigate sleep habits, sleep disturbance, and circadian types, and to identify factors influencing sleep disturbance in nursing students. Methods: Participants were 140 senior nursing students. The data were collected from May 19 to 27, 2008 using self-report questionnaires. Results: 1) Evening type delayed sleep-wake schedules were more frequent than for morning type, especially during weekend and evening shift duty. 2) In total sleep time, there were no significant statistical differences between morning type and evening type during weekdays, weekend, day or evening shift duty. 3) On weekdays and day shift duty, the mean score for sleep disturbance was significantly higher in the evening type compared to the morning type. 4) Sleep disturbance in weekday and day shift duty was influenced by circadian types, eating habits, and gender. Conclusion: The circadian types are a very important factor for determining the sleep quantity and quality in nursing students.

• Journal of the Korean Society of Food Science and Nutrition
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• v.27 no.6
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• pp.1285-1296
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• 1998

This study was performed to investigate the food behaviors of college students through a food record method. In this study, one hundred and sixty seven students of Dankook university were chosen(male:77, female:90). We collected data about nutrients intake and food behaviors. Food behaviors included a frequency of both meal and snack, meal time, eating place, person with whom they ate, reason for eating, feeling after eating, and activities during mealtime. The results of the study were summarized as follows. Energy intake per day of male and female were 2201kcal and 1781kcal, respectively. Expect for the protein, vitamin C and phosphate, nutrients were not satisfied with the RDA, especially the intake of vitamin A, Vitamin B2, and calcium was very low. Average eating frequency per day was 5.1 and meal eating frequency per day was 2.6. In addition, male ate more frequently than female did. The interval between breakfast and lunch was 295 minutes, and between lunch and dinner was 373 minutes. The places where they ate the meal and snack were mostly school and restaurant at lunch and dinner, and there was not a significant different between weekday and weekend. On weekdays, the 40~50% of subjects had a breakfast with family, and most students had a lunch or dinner with friends. During weekend, although the percentage of students who had a lunch and dinner with family were increased, a lot of students had a lunch and dinner with friends or alone. In case of reason for meal and snack, the 60~70% of subjects answered that they ate the meal for hunger, and there was not different between weekday and weekend. 60~70% of subjects felt that they eat proper, but the percentage of overeat was increased for dinner. Most students were talking with others while they had a lunch. About 20% of subjects ate only food at both breakfast and dinner and 30% of subjects were watching TV. In correlation between nutrients intake and food behaviors, the higher frequency of eating, the higher carbohydrate intake in male. In case of female, protein intake and dinner time showed the negative correlation, and protein intake and mean intervals of eating had a positive correlation. In case of male, reason for eating affected the nutrient intake, but eating place, after feeling and activity for eating had no relation with nutrients intake. But in case of female, these factors affected nutrient intake. Therefore, food behaviors had an effect on nutrients intake, and the type of effect was different between male and female.

• Journal of Family Relations
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• v.22 no.4
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• pp.135-156
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• 2018

Objectives: This study aim to determine adolescent meal time, which provides the important context of parent-child sharing time. We divided mealtime into family meal and alone meal, and analyzed the time/space context of each meal time as well as the social determinations. Method: We employed adolescents age 10-18 who live with married patents and attends school at the present (n=5,128) from the original data of Korean Time Use Survey. Results: More adolescent were engaged in family meal rather than eating alone in daily bases. However, the trend show difference by day of week and academic grade; family meal are more prevalent in weekends rather than weekdays. As adolescent reaches high school age, the proportion of eating alone beats the proportion of family meal time. Most of the meal occur at home. Having meal outside was relatively scares, especially on weekdays. Tobit and logistic analysis reveal that, on weekday meal, less school hours, more time spent at the private academy, having family leisure event, and long mother's housework hours were positively associated with family meal time. In weekend model, father's education gradient was associated with family meal time, showing higher the father's education level, there were higher chance of having weekend family meal. As for the eating alone, relevant factors were similar with family meal but the directions were the opposite; having family leisure were negatively associated with alone meal, both weekdays and weekend. Long academy hours, meal preparing and leisure alone were positively associated eating alone. Overall, weekday meal time was strongly linked with adolescent daily schedules and time use, while for weekends meal, in both family meal and alone meal, the influence of parent factors were discovered. Conclusion: The results indicates that alone meal and the family meal are not exclusively related but seem to be complementary. Families tend to enjoy family meal yet, there are some necessary situation that adolescent need to be on their own. Increase in ready-made food industries, growing independence of children by age seem partly allow adolescent children to eat alone. Careful attentions may require for monitoring weekends meal situation and the family factor of adolescent in future studies.