• 제목/요약/키워드: Shift-schedules

검색결과 38건 처리시간 0.032초

The Effect of Working-hour Characteristics and Health Status of Nurses on Work-life Balance: Using the 5th Korean Working Conditions Survey

  • Cho, Eunjeong;Ju, Jieun;Oh, Booyoung
    • Journal of Korean Biological Nursing Science
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    • 제24권4호
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    • pp.209-218
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    • 2022
  • Purpose: This study aimed to investigate the relationships between the characteristics of nurses' work schedules, health outcomes, and work-life balance. Methods: This was a secondary data analysis that included 422 nurses in Korean hospitals. Descriptive analysis, independent sample t-test, one-way ANOVA, Pearson correlation analysis, and multiple linear regression analysis were used to identify the associated factors. Results: Multiple linear regression analysis showed that work-life balance was lower when atypical work was performed (β=-.14, p=.010). Nurses who did not work overtime showed a higher level of work-life balance than those who worked overtime infrequently (β=-.11, p=.002) or frequently (β=-.28, p<.001). The work-life balance level increased when nurses had better subjective health status (β=.16, p<.001) or higher sleep quality (β=.29, p<.001). It was verified that the work-life balance level was higher for single-person households than for households with two (β=-.18, p=.003), three to four (β=-.16, p=.022), or five or more (β=-.21, p<.001) persons. Conclusion: This study suggests that government and hospital organizations should provide high-quality care and consideration to nurses who do atypical or overtime work as well as their subjective health status and sleep quality. Further research should focus on the development of a policy that improves the work-life balance of nurses, especially for those who work during atypical hours.

Modular reactors: What can we learn from modular industrial plants and off site construction research

  • Paul Wrigley;Paul Wood;Daniel Robertson;Jason Joannou;Sam O'Neill;Richard Hall
    • Nuclear Engineering and Technology
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    • 제56권1호
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    • pp.222-232
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    • 2024
  • New modular factory-built methodologies implemented in the construction and industrial plant industries may bring down costs for modular reactors. A factory-built environment brings about benefits such as; improved equipment, tools, quality, shift patterns, training, continuous improvement learning, environmental control, standardisation, parallel working, the use of commercial off shelf equipment and much of the commissioning can be completed before leaving the factory. All these benefits combine to reduce build schedules, increase certainty, reduce risk and make financing easier and cheaper.Currently, the construction and industrial chemical plant industries have implemented successful modular design and construction techniques. Therefore, the objectives of this paper are to understand and analyse the state of the art research in these industries through a systematic literature review. The research can then be assessed and applied to modular reactors.The literature review highlighted analysis methods that may prove to be useful. These include; modularisation decision tools, stakeholder analysis, schedule, supply chain, logistics, module design tools and construction site planning. Applicable research was highlighted for further work exploration for designers to assess, develop and efficiently design their modular reactors.

순환교대근무와 주간고정근무 경찰공무원의 우울감에 미치는 요인에 대한 연구 (Rotating Shift and Daytime Fixed Work Schedules as a Risk Factor for Depression in Korean Police Officers)

  • 배승민;이유진;김석주;조인희;김종훈;고승희;조성진
    • 수면정신생리
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    • 제17권1호
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    • pp.28-33
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    • 2010
  • 목 적: 근무패턴 중 일반적인 생리 스케줄에 반한 교대순환근무가 개인의 신체적, 정신적 건강을 위협한다는 고민은 계속되어 왔다. 본 연구에서는 대표적인 교대순환근무가 이루어지고 있는 경찰 공무원을 대상으로, 주간고정근무자와 비교하였을 때 교대순환 근무자에서 수면의 질, 직무스트레스, 사건충격척도, 우울증상에 있어 차이가 있는지를 조사해 보고자 하였다. 방 법: 일 도시 지역 경찰공무원 1,145명(남성 1,040명, 여성 105명)을 대상으로 하였다. 연구 대상자들의 일반적 특성으로 근무 형태를 비롯한 사회 인구학적 정보를 조사하였고, 지난 한달 동안의 수면의 질(Pittsburgh Sleep Quality Index; 이하 PSQI), 직무스트레스척도(Korean Scale of Occupational Stress; 이하 KOSS), 사건 충격 척도 개정판(Impact of Event Scale-Revised; 이하 IES-R), 우울증 척도(Center for Epidemiologic Study-Depression; 이하 CES-D)로 구성된 설문지를 작성하도록 하였다. 결 과: 전체 대상군 중 98명(9.4%)이 CES-D 점수가 16점이 넘는 경도 이상 우울증상이 있는 집단으로 분류되었다(순환교대근무자의 9.2%, 주간고정근무자의 7.8%; 남성의 7.6%, 여성의 18.1%). 순환교대근무와 주간고정근무의 근무형태 별 CES-D 점수 평균의 차이는 통계적으로 유의하지 않았다(표 1; t=1.766, p=0.078). PSQI 점수 5점 초과의 '낮은 수면의 질'에 해당하는 군은 전체 대상군 중 178명(15.5%)으로 순환교대근무자의 18.0%, 주간근무자의 13.51%가 이에 해당되었고, 두 군 간의 점수 평균의 차이는 유의미했다(t=-1.958, p=0.050). 근무 형태 별 KOSS 평균 점수 역시 두 군 간 차이가 존재했으며(t=-2.895, p=0.004), IES-R 평균 점수에서도 유의미한 차이를 보였다(t=-2.067, p=0.039). 전체 대상군의 상관관계분석에서 나이와 성별, 학력을 보정한 후, CES-D 점수는 KOSS, PSQI, IES-R 점수와 유의한 양의 상관관계를 보였다(각각 r=0.262; p<0.000, r=0.228; p<0.000; r=0.421, p<0.000). CES-D 점수 16점 이상의 경도 이상 우울증상을 종속변수로 하고, 성별, 나이, 학력, PSQI 점수, KOSS 점수, IESR 점수, 근무형태를 독립변수로 로지스틱 회귀분석을 시행하였다. 이 중 성별(여성), 나이(20대), 높은 KOSS 점수, 높은 IES-R 점수와 교대순환 근무 여부가 CES-D 16점 이상의 우울증상을 유의하게 예측하였다(각각 Wald=5.167; p=0.023, Wald=10.432; p=0.015, Wald=41.596; p=0.000, Wald=51.784; p=0.000, Wald=5.270, p=0.022). PSQI 점수는 경도 이상의 우울증상을 유의하게 예측하지 못하였다(Wald=0.898; p=0.343). 결 론; 본 연구결과는 경찰 공무원의 우울증상에 여성, 나이, 높은 직무 스트레스와 사건충격 점수뿐 아니라 교대순환 근무 역시 우울 위험도를 높이는 인자임을 제시한다.

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항해사 인지능력 평가시스템 (Development of Evaluation System for the Cognitive Performance of Marine Officers)

  • 김홍태;홍승권
    • 한국HCI학회:학술대회논문집
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    • 한국HCI학회 2009년도 학술대회
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    • pp.650-653
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    • 2009
  • 항해사의 업무수행도 감소는 해양사고 발생의 주요 원인 중의 하나로 자주 언급되고 있다. 인터뷰와 항해 기록 분석을 통한 선원의 작업시간 분석에 대한 연구는 일부를 수행되었으나, 작업부하, 작업교대, 스트레스, 수면 등이 선원의 인지능력에 미치는 영향을 분석한 사례 매우 한정적이다. 항공, 철도와 같은 다른 운송 산업에서는 승무원의 근무 패턴을 관리하기 위한 피로관리 도구를 개발하고 있고 있는데, 이러한 도구들은 선원, 항해사 및 육상관리자의 효율적인 근무일정을 계획하는데 도움을 줄 수 있다. 따라서 본 연구에서는 항해사의 인지능력을 평가하기 위해, 해상 충돌상황에서의 종합적 대응능력을 평가할 수 있는 소프트웨어 프로그램을 개발하였다. 항해 전문가를 대상으로 한 실험을 통하여, 평가기준을 개발하였으며, 실습 항해사를 대상으로 하여 시스템에 대한 검증이 이루어졌다. 본 시스템은 선박운항 시 충돌사고를 회피하기 위한 항해사의 인지능력을 평가할 수 있으므로, 당직 전 혹은 승선 전에 짧은 시간 동안의 평가를 통하여 항해사의 전반적 인지능력을 평가하고, 이 결과를 항해사에게 경고메시지 형태로 전달할 수 있다.

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Inhibition of Tumor Growth in a Mouse Xenograft Model by the Humanized Anti-HGF Monoclonal Antibody YYB-101 Produced in a Large-Scale CHO Cell Culture

  • Song, Seong-Won;Lee, Song-Jae;Kim, Chang-Young;Song, Jae-Kyung;Jung, Eui-Jung;Choi, Yong Bock;Min, Sung-Won;Oh, Jong-Won
    • Journal of Microbiology and Biotechnology
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    • 제23권9호
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    • pp.1327-1338
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    • 2013
  • The humanized anti-hepatocyte growth factor (HGF) monoclonal antibody (mAb) YYB-101 is a promising therapeutic candidate for treating various cancers. In this study, we developed a bioprocess for large-scale production of YYB-101 and evaluated its therapeutic potential for tumor treatment using a xenograft mouse model. By screening diverse chemically defined basal media formulations and by assessing the effects of various feed supplements and feeding schedules on cell growth and antibody production, we established an optimal medium and feeding method to produce 757 mg/l of YYB-101 in flask cultures, representing a 7.5-fold increase in titer compared with that obtained under non-optimized conditions. The optimal dissolved oxygen concentration for antibody production was 70% $pO_2$. A pH shift from 7.2 to 7.0, rather than controlled pH of either 7.0 or 7.2, resulted in productivity improvement in 5 L and 200 L bioreactors, yielding 737 and 830 mg/ml of YYB-101, respectively. The YYB-101 mAb highly purified by affinity chromatography using a Protein A column and two-step ion exchange chromatography effectively neutralized HGF in a cell-based assay and showed potent tumor suppression activity in a mouse xenograft model established with human glioblastoma cells.

An Index to Assess Overwork-Related Adverse Effects on Employees Under the Occupational Safety and Health Act in Taiwan

  • Yu-Cheng Lin;Yu-Wen Lin
    • Safety and Health at Work
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    • 제13권4호
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    • pp.401-407
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    • 2022
  • Background: The present study aimed to digitally evaluate the risk of overwork-related adverse effects (OrAEs) among employees from various occupational categories in Taiwan. Methods: Anonymous data of employees from seven companies/factories providing occupational health services were analyzed. The studied population comprised 5505 employees, and the data analyzed included employment duration, working hours, shift work schedules, and health checkup results. The risk for OrAEs was assessed by an index, Karo index (0-4, the larger the value, the higher the risk for OrAEs) obtained using a risk matrix made up of cardiocerebral and occupational risk factors. Karo index values of 3 and 4 were categorized as at high risk for OrAEs (h-OrAEs). Results: The 5505 employees had an average employment duration of 8.5 years and a mean age of 39.4 years. The prevalence rates for h-OrAEs of the seven companies/factories ranged from 3.9% to 34.2%. There were significant differences in prevalence rates for h-OrAEs between employees of retail stores and high-tech manufacturing factories. Multivariate analysis results indicated that workers of high-tech manufacturing factories had significantly higher risk for h-OrAEs compared with retail store workers. Conclusion: In terms of satisfying health risk management and legal requirements in Taiwan, the newly issued Karo index, which covers a wide range of occupational risk factors, can serve as an assessment and a warning tool for managing the risk of OrAEs in workplaces. To reduce risks for h-OrAEs, active and prudent control of cerebrocardiovascular risks and working hours is recommended.

Effect of Reverse Feeding on the Reproductive System in Male Rats

  • Jeon, Eun-Young;Lee, Sung-Ho
    • 한국발생생물학회지:발생과생식
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    • 제16권3호
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    • pp.227-233
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    • 2012
  • Circadian timing system plays a major role in a wide range of reproductive function. However it is plausible idea that other environmental and/or internal cue might be simultaneously participated in the optimal regulation of reproductive system. In the present study we extended the reverse feeding (RF) time regimen up to 8 weeks, then measured the general and reproductive indices of the animals. The animals of ad libitum feeding group (Control, CON) have free access to food for 4, 6 and 8 weeks, respectively. The day feeding animals (reverse feeding, RF group) have restricted access to food during daytime (09:00-18:00) for 4, 6 and 8 weeks, respectively. When the feeding schedules were over, key indices were measured. After 4 weeks and 8 weeks of feeding, body weights of animals were not significantly different. However, body weights of 6 weeks RF animals were significantly smaller than those of control animals (CON : RF = $333.46{\pm}12.71$ g : $289.91{\pm}8.31$ g, p<0.01). The blood glucose levels of 4 weeks RF animals were significantly decreased compared to the levels of control animals (CON : RF = $161.4{\pm}2.7$ mg/dL : $176.7{\pm}5$ mg/dL, p<0.01) while the levels of 6 weeks RF and 8 weeks RF animals were not different form those of control animals. Reproductive and non-reproductive tissue weights from 6 weeks RF group were significantly lowered than those from CON group (testis, CON : RF = $1.4714{\pm}0.0174$ g : $1.3724{\pm}0.0168$ g, p<0.001; epididymis, CON : RF = $0.3574{\pm}0.0059$ g : $0.3243{\pm}0.0068$ g, p<0.001; seminal vesicle, CON : RF = $0.1655{\pm}0.0068$ g : $0.1328{\pm}0.0054$ g, p<0.001; prostate, CON : RF = $0.3350{\pm}0.0231$ g : $0.2528{\pm}0.0143$ g, p<0.01). After 4 weeks and 8 weeks of reverse feeding, sperm counts in RF animals were markedly reduced than those in control animals[CON 4W : RF 4W = $121.17{\pm}9.96\;({\times}10^6)$ : $50.86{\pm}9\;({\times}10^6)$, p<0.001; CON 8W : RF 8W= $138.69{\pm}9.8\;({\times}10^6)$ : $108.94{\pm}4.22\;({\times}10^6)$, p<0.001]. Present study indicates that RF may induce an adaptable metabolic stress and cause impairment of androgen-dependent reproductive tissues. On-going longitudinal studies will allow a better understanding of the how does mealtime shift affect the reproductive function and exact nature of adaptation.

충돌시나리오 기반의 항해사 인지능력 평가시스템 개발 (Development of Collision Scenario-Based Evaluation System for the Cognitive Performance of Marine Officers)

  • 김홍태;;양원재
    • 한국항해항만학회지
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    • 제31권8호
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    • pp.629-635
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    • 2007
  • 항해사의 업무수행도 감소는 해양사고 발생의 주요 원인 중의 하나로 자주 언급되고 있다. 인터뷰와 항해 기록분석을 통한 선원의 작업시간 분석에 대한 연구는 일부를 수행되었으나, 작업부하, 작업교대, 스트레스, 수면 등이 선원의 인지능력에 미치는 영향을 분석한 사례 매우 한정적이다. 항공, 철도와 같은 다른 운송 산업에서는 승무원의 근무 패턴을 관리하기 위한 피로관리 도구를 개발하고 있고 있는데, 이러한 도구들은 선원, 항해사 및 육상관리자의 효율적인 근무일정을 계획하는데 도움을 줄 수 있다. 따라서 본 연구에서는 항해사의 인지능력을 평가하기 위해, 해상 충돌상황에서의 종합적 대응능력을 평가할 수 있는 소프트웨어 프로그램을 개발하였다. 항해 전문가를 대상으로 한 실험을 통하여, 평가기준을 개발하였으며, 실습 항해사를 대상으로 하여 시스템에 대한 검증이 이루어졌다. 본 시스템은 선박운항 시 충돌사고를 회피하기 위한 항해사의 인지능력을 평가할 수 있으므로, 당직 전 혹은 승선 전에 짧은 시간 동안의 평가를 통하여 항해사의 전반적 인지능력을 평가하고, 이 결과를 항해사에게 경고메시지 형태로 전달할 수 있다.