• Journal of Chest Surgery
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• 제57권3호
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• pp.272-280
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• 2024

Background: The phenomenon known as the "weekend effect" impacts various medical disciplines. We compared outcomes between regular hours and off hours to investigate the presence of the weekend effect in extracorporeal cardiopulmonary resuscitation (ECPR). Methods: Between January 2018 and December 2020, 159 patients at our center were treated with veno-arterial extracorporeal membrane oxygenation (ECMO) for cardiac arrest. We assessed the time required for ECMO preparation, the rate of successful weaning, and the rate of in-hospital mortality. These factors were compared among regular hours ("daytime": weekdays from 7:00 AM-7:00 PM), off hours on weekdays ("nighttime": weekdays from 7:00 PM-7:00 AM), and off hours on weekends and holidays ("weekend": Fridays at 7:00 PM to Mondays at 7:00 AM). Results: The time from the recognition of cardiac arrest to the arrival of the ECMO team was shortest for the daytime group and longest for those treated over the weekend (daytime, 10.0 minutes; nighttime, 12.5 minutes; weekend, 15.0 minutes; p=0.064). The time from the ECMO team's arrival to ECMO initiation was shortest for the daytime and longest for the nighttime group (daytime, 13.0 minutes; nighttime, 18.5 minutes; weekend, 14.0 minutes; p=0.028). No significant difference was observed in the rate of successful ECMO weaning (daytime, 48.3%; nighttime, 39.5%; weekend, 36.1%; p=0.375). Conclusion: In situations involving CPR, the time to arrival of the ECMO team was longer during off hours. Furthermore, ECMO insertion required more time at night than during the other periods. These findings warrant specific training in decision-making and emergent ECMO insertion.

• 농촌지도와개발
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• 제9권1호
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• pp.29-41
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• 2002

The purpose of this study was to explore socio-economic effects of participation in weekend farming. This study was carried out through review of literature and descriptive survey. The data for the study were gathered from 135 randomly sampled urban people who participated in the weekend farming activity. Small scale weekend farming activity of the urban people led them to better quality of life in terms of educational and socio-economic conditions. The major findings of the study were as follows; 1) Weekend farming supplied fresh vegetables to participating urban households, however, showed relatively low economic effects. 2) Participating urban people have experienced new relationships with other participants and could better understood their family members of weekend farming activity. 3) Participating urban people responded that they could improve their quality of life through weekend farming activity. 4) Weekend farming activity proved to be a useful educational experience for children and youth.

• 대기
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• 제17권2호
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• pp.147-157
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• 2007

A weekend effect has been investigated in diurnal temperature range (DTR) for Seoul in Korea using 50-year (1955 ~ 2005) surface measurements of maximum and minimum temperatures, and particle mass concentrations (PM10). The minimum temperature increases by 0.42K per decade, 2 times faster than the maximum temperature during 1955 to 2005, for rapid urbanization has occurred in Seoul. The weekend effect, which is defined as the DTR for Sunday minus the average DTR for Tuseday through Thursday, can be as large as +0.08 K for the recent 20-year period relative to 0.01K for 1955 to 1975. Especially the wintertime DTR tends to have a remarkable positive weekend effect (+0.17K), that is, larger DTR on Sunday compared to weekdays, which seems to be associated with increased maximum temperature and thus an increase in DTR. This result could be explained by relative differences in PM10 concentration between Sunday and weekdays (Tuesday through Thursday), such that PM10 concentration on Sundays appears to be systematically lower about 12% than on weekdays. The annually average weekend DTR increases by 0.2K with $10{\mu}gm^{-3}$ decrease in PM10 concentration in comparison with weekdays. The results could be possible evidence of an anthropogenic link to DTR, one of climate important indicators, since no meteorological phenomenon is supposed to occur over a 7 day cycle.

• 한국의류산업학회지
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• 제19권4호
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• pp.434-447
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• 2017

This study investigated the effects of influencing factors on the sales volume of apparel products. Based on previous studies, weekend effect, discount rate, and meteorological factors including daily average temperature, rainfall, sea level pressure, and fine dust were selected as independent variables to calculate their effects on sales quantity of apparel products. The daily sales data during 2015 - 2016 were collected from casual brands and outdoor brands which "A" apparel manufacturing company had operated. The actual data of "A" company were analyzed using SAS(R) 9.4 and SAS(R) Enterprise Miner 14.1. The results of this study were as follows: First, the influencing factors on total sales volume of apparel products were proved to be the weekend effect, discount rate, and fine dust. Second, the analysis of influencing factors on sales volume of apparel products according to season showed: 1) In casual brands, the average temperature had a significant influence on the sales volume of spring/summer products, and the sea level pressure affected the sales volume of summer/fall/winter products significantly. 2) In outdoor brands, the average temperature and the fine dust had a significant influence on the sales volume of all season's products. The sea level pressure affected the sales volume of summer/fall/ winter products significantly. The weekend effect and the discount effect affected the sales volume of apparel products partly. Third, the effect of rainfall was not proven significant, which was different from the results of past studies.

• 한국환경과학회지
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• 제23권5호
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• pp.861-871
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• 2014

This study analyzes the characteristics of ozone weekend effect(OWE) in Busan. $O_3$ concentration on Sunday was over 10% higher than that on weekdays in all areas except for Kwangbokdong, Taejongdae, and Joadong. Such a difference was higher in the industrial area than in the residential area. $O_3$ generation was facilitated by the decrease in $NO_X$ emission on Sunday in VOC-limited regime where the VOC/$NO_X$ ratio is low. Low NO concentration in the Sunday morning decreased inhibition of $O_3$. NO-$O_3$ crossover time on Sunday was shorter than that on weekdays which in turn extended the accumulated duration of $O_3$. Future studies can include whether the entire Busan is VOCS-limited or the coastal area is VOCS-limited while the inland area is $NO_X$-limited.

• 아태비즈니스연구
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• 제11권2호
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• pp.15-25
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• 2020

Purpose - The purpose of this study is to examine whether the change of settlement procedures have an impact on the distribution of day of the week effect in the UK and French markets or not. U.K and France changed their systems from fixed settlement date systems to fixed settlement lag systems Design/methodology/approach - This study adopted the data of the specific stock market indices such as FTSE 100 in the U.K market and FRCAC 40 in the French market, This study constructs a test of the differences in mean returns across the days of the week by computing the regression equations for each country index. Findings - First, this study found that the evolving settlement procedures in stock exchanges have an effect on stock return of day of the week. Second, long-run improvements in market efficiency may have diminished the effects of certain anomalies in recent periods. Improvements in market efficiency and evolving settlement systems may cause the disappearance of the weekend effect. Research implications or Originality - The Implication of this study is that recent settlement systems contributed to the disappearance of the weekend effect and explains improvements in market efficiency and diminishments of market anomaly. This study may be the first study which examines whether evolving settlement systems have an effect on the disappearance of the weekend effect in the market or not.

• 가정과삶의질연구
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• 제20권4호
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• pp.165-177
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• 2002

The purpose of this study is to analyze the effect of different working days of married working men and women on their time use on the weekend. The data collected by The National Statistical Office in 1999 was used. Among the total sample of 17,000 families, 7580 samples who are married, employed, and more than 20 yews old are selected for the analysis. This study has resulted in two major findings. (1)the working days affect on the time use on the weekend. The pattern is somewhat different by sex. The women spend more time in leisure and houseworks on the weekend as the working days decrease. However, the men do not spend more time on doing houseworks as the working days decrease. The time spent on leisure and physiologic time is increased both men and women as the change of workweek from the biweekly five-day to the weekly five-day: (2)if the five-day workweek and more flexible hours are introduced, they will contribute to Improve the quality of life of workers. This fact shows positive view at the last stage of legislation of the five-day workweek .

• Journal of Cerebrovascular and Endovascular Neurosurgery
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• 제25권3호
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• pp.297-305
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• 2023

Objective: The term "weekend effect" refers to an increase in the mortality rate for hospitalizations occurring on weekends versus weekdays. In this study, we investigated whether such an effect exists in patients undergoing mechanical thrombectomy for acute ischemic stroke with large vessel occlusion (currently the standard treatment for this condition) at a single center in Japan. Methods: We surveyed 151 patients who underwent mechanical thrombectomy for acute ischemic stroke with large vessel occlusion (75 and 76 patients were treated during daytime and nighttime, respectively) from January 2019 to June 2021. The items evaluated in this analysis were the rate of modified Rankin Scale ≤2 or prestroke scale, mortality, and procedural treatment time. Results: The rates of modified Rankin Scale ≤2 or prestroke scale and mortality at 90 days after treatment did not differ significantly between daytime and nighttime (41.3% vs. 29.0%, p=0.11; 14.7% vs. 11.8%, p=0.61, respectively). The door-to-groin time tended to be shorter during daytime versus nighttime (57 [IQR: 42.5-70] min vs. 70 [IQR: 55-82]) min, p=0.0507). Conclusions: This study did not reveal differences in treatment outcome between daytime and nighttime in patients undergoing mechanical thrombectomy for acute ischemic stroke with large vessel occlusion. Therefore, the "weekend effect" was not observed in our institution.

• 한국산림휴양학회지
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• 제22권4호
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• pp.49-58
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• 2018

본 연구는 도시숲을 활용한 주말 회기형 산림치유 프로그램이 가족 응집력과 가족관계 향상에 미치는 효과와 프로그램에 대한 부모의 만족도를 알아보기 위해 수행되었다. 2018년 4월부터 8월까지 인천대공원에서 진행되는 주말 산림치유 프로그램에 참가한 가족 21팀(65명)을 대상으로 하였고, 주1회 2시간씩 총 4회 8시간으로 가족 숲체험 활동과 산림치유요법을 활용한 프로그램을 새롭게 구성하여 실행하였다. 연구결과 주말 가족대상 산림치유 프로그램은 가족응집력 및 가족관계 향상에 긍정적인 영향을 주었으며, 부모의 만족도 분석 결과 대부분의 항목에서 높은 만족도를 보였다. 따라서 산림치유활동은 가족의 응집력 및 가족관계를 개선함으로써 가족의 결속이나 정서적 유대와 같은 기능이 중요하게 인식되는 현대사회에 효과적인 치유활동으로 적합하다는 결론을 도출하였다. 추후 연구에서는 다양한 형태의 가족을 대상으로 확대 시행하며, 가족의 요구를 반영한 다양하고 흥미로운 가족체험 산림치유 프로그램 개발이 지속적으로 이루어져야 할 것이다.

• 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.