• 한국콘텐츠학회논문지
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• 제15권12호
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• pp.314-325
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• 2015

본 연구는 청소년의 수면시간이 자살충동에 미치는 영향에 대한 성별 차이를 분석했다. 전국 규모의 자료를 사용해 이항 로지스틱 분석을 실시했으며, 주요 분석결과는 다음과 같다. 먼저, 평일 수면시간은 남학생 집단에서만 자살충동에 유의한 영향을 미쳤다. 평일 수면시간이 7시간 미만인 남학생이 자살충동을 경험할 가능성이 그렇지 않은 학생보다 약 1.9배 높았으며, 이 효과는 관련 변인을 통제했을 때도 유의했다. 여학생의 경우에는 평일 수면시간이 7시간 미만인 학생이 자살충동을 경험할 가능성이 약 1.3배 높았지만, 이 효과는 스트레스 변인 등을 통제했을 때 유의하지 않게 변했다. 한편, 주말 수면시간은 성별에 관계없이 자살충동에 유의한 영향을 미치지 못했다. 주말에는 일반적으로 등교부담이 없어 수면부족을 덜 경험하기 때문에 수면시간의 자살충동 효과가 유의하지 않게 나타난 것으로 보인다. 본 연구는 수면시간의 자살충동 효과에서 나타나는 평일과 주말 수면시간, 성별 집단에 따른 차이를 밝힘으로써 수면시간 연구에서 사회적 접근이 필요하다는 주장을 뒷받침했다.

• 한국학교ㆍ지역보건교육학회지
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• 제12권1호
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• pp.45-58
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• 2011

Objectives: The purpose of this study is to analyze the fators affecting Internet addiction among adolescents in an area. Methods: By using cluster sampling, 2,479 participants representing 22 elementary school, 11 middle school, 7 high school students in a county of the Chungcheongnam-do. Data was analyzed by SPSS 12.0. using t-test, F-test, chi-square test, Pearson correlation coefficient and multiple regression. Results: Internet addiction positively correlated with high school students(dummy variable), Internet-connected computers in PC Game Room(dummy variable), Internet using time(weekday) and Internet using time(weekend). Internet addiction negatively correlated with Internet-connected computers in school(dummy variable), Internet-connected computers in friend's house(dummy variable). For the male students, Significant factors affecting Internet addiction were eating habits, Internet-connected computers in friend's house, Internet using time(weekend). For the female students, Internet using time(weekday) and Internet using time(weekend) were significant. For the elementary school students, Significant factors affecting Internet addiction were Internet using tine(weekday) and Internet using time(weekend). In the case of the middle school students, Internet using tine(weekday), Internet using time(weekend) and eating habits were significant. but, the high school students, Internet using time(weekend) was significant. Conclusions: Students who spend more time in the internet have higher tendency to become addicted to the internet. Therefore, it would be necessary to develop program to prevent internet addiction.

• 가정과삶의질연구
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• 제3권1호
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• pp.15-22
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• 1985

This study was designed to examine leisure time and leisure activities of homemakers and to predict future leisure time and future leisure time orientation. Present leisure time and future leisure time orientation were studied in relation to sociodemographic and physical environmental variables, time use variables and attitude variables. The major findings were the average daily housework time of homemakers was 6.5 hours on weekends. Housework time of employed homemakers was 3.5 hours and full-time homemakers was 8.0 hours. Daily leisure time of homemakers was 4.0 hours on weekdays and 4.8 hours o weekends. Most homemakers leisure activities on weekdays and weekends were reading, watching TV or listening to the radio and resting. In the future, they want to go hiking, hunting, traveling or fishing, attending concerts, drama or movies and playing sports games. The homemakers who felt their amount of present leisure time was sufficient were 35.4% and insufficient were 37.9%. Regarding the present leisure activities, 43.1% of homemakers expressed dissatisfaction, though 21.9% of them satisfied. Factors affecting the homemakers weekday leisure time were homemakers' occupation, family type, type of heating form house and cooking, weekday and weekend housework time of homemakers. Weekend leisure time interacted with family life cycle, number of children, income, education and occupation of homemakers, size of house, type of heating for house and cooking, weekday housework time of homemakers. housework time of employed housekeeper, husbands' weekend housework time, weekday leisure time of homemakers.

• 한국환경과학회지
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• 제23권7호
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• pp.1241-1251
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• 2014

The study investigates weekday/weekend characteristics of $PM_{10}$ and $PM_{2.5}$ concentrations and meteorological elements in Busan. The $PM_{10}$ concentration is highest on Wednesday and Thursday, and lowest on Sunday. On the other hand, the $PM_{2.5}$ concentration is highest on Wednesday and lowest on Sunday. The location where concentrations of weekdays and weekend differ the most is Hwakjang-dong, the industrial area, and where they differ the least is Gijang-up and Joa-dong, the residential area. Fine particle concentration in the industrial area was consistent at dawn and in the morning, but varied in the afternoon and at night. The visibility of Sunday was 0.49 km higher than that of weekdays, and the solar radiation of Sunday was $0.11MJ/m^2$ higher than that of weekdays. These results indicate that the concentration of fine particles had influence on the change of visibility and solar radiation.

• 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.

• 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.

• 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.

• 도시과학
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• 제7권1호
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• pp.45-54
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• 2018

The purpose of this study is to find the factors that reduce prediction error in traffic volume using highway traffic volume data. The ARIMA model was used to predict the day, and it was confirmed that weekday and weekly characteristics were distinguished by prediction error. The forecasting results showed that weekday characteristics were prominent on Tuesdays, Wednesdays, and Thursdays, and forecast errors including MAPE and MAE on Sunday were about 15% points and about 10 points higher than weekday characteristics. Also, on Friday, the forecast error was high on weekdays, similar to Sunday's forecast error, unlike Tuesday, Wednesday, and Thursday, which had weekday characteristics. Therefore, when forecasting the time series belonging to Friday, it should be regarded as a weekly characteristic having characteristics similar to weekend rather than considering as weekday.

• 한국환경보건학회:학술대회논문집
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• 한국환경보건학회 2005년도 국제학술대회
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• pp.299-302
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• 2005

Vehicle occupant exposure to air pollutants has been a subject of concern in recent years because of higher levels of air pollutants inside gasoline or diesel-using vehicle, comparing to the surrounding atmosphere. This study evaluated the potential exposure to respirable suspended particulate (RSP), nitrogen dioxide ($NO_2$) and volatile organic compounds (VOCs), comparing weekday (Monday and Thursday) and weekend (Saturday). Indoor mean concentrations of RSP inside vehicle were 51.2 $ug/m^3$ and 75.52 $ug/m^3$ in weekday and weekend, respectively. Measured indoor NO$_2$ concentrations were 14,8 ppb and 20.8 ppb, respectively. Benzene and toluene mean concentrations inside vehicle were 5.4${\pm}$2.4 ppb and 23.8${\pm}$33.8 ppb, respectively.

• 환경위생공학
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• 제20권4호통권58호
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• pp.69-75
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• 2005

Professional taxi driver exposure to indoor air pollutants has been a subject of concern in recent years because of higher levels of air pollutants, comparing to the surrounding atmosphere. This study evaluated the potential exposure to respirable suspended particulate (RSP), nitrogen dioxide $(NO_2)$ and volatile organic compounds (VOCs; benzene and toluene) for professional taxi drivers inside each of 10 vehicles in Pusan, comparing weekday (Monday and Thursday) and weekend (Saturday). Indoor mean concentrations of RSP inside vehicle were $53.88\;ug/m^3\;and\;75.52\;ug/m^3$ on weekday and weekend, respectively. Measured indoor $NO_2$ concentrations were 28.32ppb and 40.69 ppb, respectively. Benzene and toluene mean concentrations inside vehicle were 5.41 ppb and 11.36 ppb, respectively. Considering no smoking of taxi drivers inside vehicle, closed window in winter, and increased usage of taxi on weekend, source of indoor air pollutants inside taxi might be mainly suggested from the number of passenger's carried, faulty exhaust systems, and engine and carburetor evaporative emissions.