• 정신신체의학
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• 제30권2호
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• pp.187-195
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• 2022

Objectives : We aimed to explore weekend catch-up sleep (CUS) by age and to find out the association between CUS and depression by the age group and weekday sleep duration (SD). Methods : Using data from the 2016-2018 Korean National Health and Nutrition Examination Survey, the CUS by age of 16,174 subjects was investigated, and the depression data of 11,088 subjects were analyzed. CUS was calculated as the weekend sleep duration minus weekday sleep duration (SD). The mean of CUS and weekday SD in depression group and non-depression group was compared by early, middle, and late adulthood groups, and logistic regression analysis was performed to investigate the effect of CUS on the depression by age group when weekday SD was insufficient. Results : The CUS tended to decrease continuously with age, the mean of CUS in the late adult group was the shortest. However, the average SD, adjusted for weekend CUS, was the shortest in the middle adulthood group. Overall, the sleep durations were shorter in the depression group than in the non-depression group, but the CUS difference between the two groups was significantly only in the middle adulthood. The risk of depression was significantly higher when weekend CUS was less than 1hour with a short weekday SD of less than 6hours (OR 2.44, 95% CI: 1.78-3.35), and this finding was significant in all adult groups. Conclusions : The findings of this study suggest that short weekday SD and inadequate weekend CUS are associated with depression and that CUS is an option to compensate for sleep deprivation and prevent depression.

• International Journal of Human Ecology
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• 제16권2호
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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.

• 한국콘텐츠학회논문지
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• 제15권8호
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• pp.460-472
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• 2015

본 연구의 목적은 가나증권거래소 종합지수를 바탕으로 가나 증권 시장에서 주말 효과 및 1월 효과가 나타나고 있는지를 분석하고자 하는 것이다. 이를 위해 가나 증권시장에 상장된 기업을 대상으로 2005년 1월 4 일부터 2013년 12월 31일까지 9년간의 일별종가와 종합지수를 나타내는 ASI 및 CI를 토대로 회귀분석을 이용하여 두 효과를 검증하였다. 회귀분석 결과에 따르면 가나 증권 시장에서는 주말효과가 나타나지 않아 선행 연구 결과와 다르게 나타났으며 이는 연구기간과 연구 자료가 다르기 때문인 것으로 사료된다. 월간효과의 회귀 분석 결과, ASI가 사용된 2005년부터 2010년까지 6년의 기간 전체를 대상으로 분석한 결과 4월 효과가 나타났으며, ASI가 사용된 기간을 3년을 기준으로 두 개의 기간으로 구분하여 분석한 결과 2005년부터 2007년까지의 기간은 4월 효과가 보이지 않지만 2008년부터 2010년까지 기간의 경우에는 4월 효과가 나타났다. CI가 사용된 2011년부터 2013년까지 기간의 경우에는 1월 효과가 존재하는 것으로 나타났다.

• 농촌계획
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• 제25권4호
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• pp.57-64
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• 2019

The purpose of this study was to investigate the general characteristics of the elderly who participate in the planting activities of weekend farms and the effect of the planting activity levels on the subjective health, depression, and human relationships of the elderly. Data were collected and analyzed using subjective health, depression, and human relationship measures that can represent physical, mental, and social health. The main results were as follows. The educational level, the status of spouses, and the number of diseases of the general characteristics of the elderly who participated in the weekend farm showed significant differences in all subjective health, depression, and human relationships. Plant cultivation activity level was positively correlated with the subjective health of the elderly and had a significant effect. The higher the level of plant cultivation activity, the more positively it affected the human relationship. Plant cultivation activity was negatively correlated with the depression of the elderly.

• 한국환경보건학회지
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• 제26권4호
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• pp.58-64
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• 2000

Indoor air quality tends to be the dominant contributor to personal exposure, because most people spend over 80% of their time indoors. In this study, indoor and outdoor NO$_2$ concentrations were measured and compared with simultaneously personal exposures of 21 university students in weekday and weekend. House characteristics and activity pattern were used to determine the impacts of these factors on personal exposure. Since university students spent most of their times in indoor, their NO$_2$ exposure was associated with indoor NO$_2$ level rather than outdoor NO$_2$ level both weekday and weekend in spite of different time activity. Using time-weighted average model, NO$_2$ exposures of university students were estimated by NO$_2$ measurements in indoor home, indoor school, and outdoor home levels. Estimated NO$_2$ personal exposures were significantly correlated with measured NO$_2$ personal exposures($r^2$=0.87). However, estimated personal NO$_2$ exposures by time-weighted average model were underestimated, comparing with the measured personal NO$_2$ exposure. Using multiple regression analysis, effect of personal NO$_2$ exposure for transportation was confirmed.

• 복식문화연구
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• 제25권2호
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• pp.117-129
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• 2017

The purpose of this study was to investigate meteorological factors' effects on clothing sales based on empirical data from a leading apparel company. The daily sales data were aggregated from "A" company's store records for the Fall/Winter season from 2012 to 2015. Daily weather data corresponding to sales volume data were collected from the Korea Meteorological Administration. The weekend effect and meteorological factors including temperature, wind, humidity, rainfall, fine dust, sea level pressure, and sunshine hours were selected as independent variables to calculate their effects on A company's apparel sales volume. The analysis used a SAS program including correlation analysis, t-test, and multiple-regression analysis. The study results were: First, the weekend effect was the most influential factor affecting sales volume, followed by fine dust and temperature. Second, there were significant differences in the independent variables'effects on sales volume according to the garments' classification. Third, temperature significantly affected outer garments'sales volume, while top garments' sales volume was not influenced significantly. Fourth, humidity, sea level pressure and sunshine affected sales volume partly according to the garments' item. This study can provide proof of significant relationships between meteorological factors and the sales volume of garments, which will serve well to establish better inventory strategies.

• 대한통합의학회지
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• 제10권1호
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• pp.1-11
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• 2022

Purpose : Obesity is a major public health burden in developed countries and a well-known risk factor for cardiovascular disease. Short sleep duration is associated with obesity, as well as diabetes, heart disease and death. In modern society, habitual sleep restrictions seem unavoidable due to social obligations and work schedules along with a tendency toward decreased sleep time. Therefore, the purpose of this study is to examine the effect of differences in sleep time between weekdays and weekends on body mass index (BMI). Methods : This study involved 4,234 Korean adults aged 20 to 64 years based on data obtained from the 7th national health and nutrition examination survey (2016). All subjects were classified into the weekend catch-up sleep group (weekend CUS group). and the non catch-up sleep group (non-CUS group). Results : The longer the average sleep time, the lower was the BMI, and the larger the difference in sleep time between weekdays and weekends, the lower was the BMI. Compared with those with an average sleep time of 8 hours or more, obesity was 1.6-fold higher when the average sleep time was less than 6 hours, and 1.2-fold higher in the case of sleep time of 7 hours or more and less than 8 hours. When the difference in sleep time between weekdays and weekends was 0 or less, more than 0 hours but less than 1 hour, and more than 1 hour and less than 2 hours, the risk of obesity was 1.2-fold, 1.1-fold and 1.1-fold higher, respectively, compared with the risk associated with a sleep time difference of 2 hours or greater between weekdays and weekends. However, the difference was not statistically significant. Conclusion : Short sleep duration is positively associated with obesity. In addition, weekend catch-up sleep affects BMI.

• 재무관리연구
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• 제20권2호
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• pp.201-234
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• 2003

본고에서는 세계시장 중에서 주요 7 국가의 시장을 대상으로 시장의 이례현상의 하나인 주말 효과와 주중 일별수익률에 대한 연구를 결제청산과정으로 접근 분석하였다. 결제청산과정은 특정한 날의 일별수익률에 영향을 미칠 수 있고 또한 시장마다 서로 다른 결제청산체계는 세계 각 시장에서 특정한 날의 일별수익률에 서로 다르게 영향을 미칠 수 있다. 최근 이러한 결산청산체계 자체가 미국, 영국 프랑스 등 여러 주요시장에서 변화가 일어났다. 그리하여 본고에서는 세계 각 국가시장에서 주식의 결제청산과정체계의 변화 및 전환에 따라 주말효과 및 주중 일별수익률의 변화에 미치는 요인을 분석하였다. 그리고 또한 주말효과와 같은 시장효율성의 이례 현상에 대한 최근 연구에서 그전과 다른 기류에 대한 연구결과가 보고되기 시작하였다. 그리하여 그전의 자료와 최근의 10여 년간의 자료를 나누어 세계 각 주요시장의 주말효과에 대한 연구를 재검토 할 필요가 있었다. 본고에서 분석한 결과 1990년대 이전에는 각 시장마다 주말효과가 강하지만 최근 10여 년 동안의 자료를 분석한 결과 주말효과가 나타난 국가의 시장은 거의 없었다. 그리고 본고에서 결제청산과정체계의 변화 및 전환이 주말효과 및 주중 일별수익률의 미치는 영향을 분석한 결과 결제청산과정의 종류나 또는 각 시장 상황에 따라 정도의 차이는 있지만 대체적으로 결제청산과정의 변화가 특정한 날의 일별 수익률 패턴에 영향을 미치고 또한 주말효과의 수준의 변화의 일부분은 이러한 결제청산과정의 영향을 받았다고 볼 수 있었다.

• Journal of Nutrition and Health
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• 제46권4호
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• pp.332-345
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• 2013

부산 및 경남 일부 지역의 남녀 초등학생 (4~6학년)과 중학생 (2~3학년)을 대상으로, 24시간 회상법과 식사기록법을 이용하여 수집한 식품섭취조사 내용을 분석하였고, 연령과 성별에 따른 네 군 (ME, FE, MM, FM)의 식행동과 영양소 섭취 실태가 주중과 주말에 유의한 차이가 있는 지 살펴보았다. 주요한 결과는 다음과 같다. 1) 부모와 함께 식사한 횟수, 혼자 저녁을 먹은 횟수, 친구와 외식한 횟수, 건강에 유익한 식품 및 건강에 유익하지 않은 식품의 섭취 수준, 간식구매 비용 등을 고려해볼 때 FE가 중학생 (MM, FM)에 비해 바람직한 식행동을 나타내었다. 2) 식품군별 섭취량은 주중에 비해 주말에 감소하는 경향을 보였으며 이러한 현상은 중학생에 비해 초등학생에서 더 뚜렷하였다. 특히 초등학생의 우유 및 유제품과 채소류의 주말 섭취량은 주중에 비해 현저히 감소하였다. 3) ME는 총에너지를 비롯한 대부분의 영양소 섭취량이 주말에 감소하였고, FE와 MM은 칼슘, 인, 아연, 나이아신, 비타민 $B_6$ 섭취량이 주말에 감소하였다. FM은 에너지 및 영양소 섭취 수준이 가장 낮았던 반면에 주중과 주말의 차이도 적었다. 4) MM이 초등학생 (ME, FE)에 비해 주중의 에너지, 단백질, 칼슘, 식이섬유, 아연, 비타민 A, 비타민 $B_1$, 나이아신, 비타민 $B_6$의 %KDRIs가 유의하게 낮았다. 또한 MM이 FE에 비하여 주말의 에너지, 칼슘, 아연, 비타민 $B_1$, 비타민 $B_2$, 나이아신, 비타민 $B_6$에 대한 %KDRIs가 유의하게 낮았다. 모든 군에서 칼슘의 섭취 부족이 심각한 것으로 나타났다. 6) 종합해보면 식행동과 식품 및 영양소 섭취에 있어 초등학생과 중학생의 연령과 성별에 따른 차이가 드러났으며 MM은 식행동과 식품 및 영양소 섭취가 가장 불량한 것으로 보인다. 따라서 초등학생과 중학생을 위한 영양교육 현장에서는 연령과 성별에 따른 식행동의 상이성, 주중과 주말의 차이 등을 고려함으로써 효과적인 영양중재가 가능할 것으로 사료된다.

• 통상정보연구
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• 제8권4호
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• pp.391-411
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• 2006

The present Study investigated on effect of working time and physical work environment on job satisfaction, and is based on a representative survey carried out in the 15 European Union Member States in 2,000 on behalf of the European Foundation for the Improvement of Living and Working Conditions by Infratest Burke Sozialforschung and a consortium of national fieldwork institutes. In the course of the survey, a total of 21,703 people drawn from the economically active populations in the 15 countries were questioned about their working time, overtime, weekend work, physical work environment, social support of supervisor and co-worker and job satisfaction. Regression analysis and subgroup analysis were employed to examine the hypotheses. It was found that weekend work, overtime and physical work environment associate negatively with job satisfaction. Social support of supervisor and co-worker moderated only relation between working time and job satisfaction. The results provide support for prior quantitative studies partly. Based on these significant research findings, theoretical implications were discussed.