WorldWideScience

Sample records for re2 study nights

  1. A study on artificial rare earth (RE2O3) based neutron absorber.

    Science.gov (United States)

    Kim, Kyung-O; Kyung Kim, Jong

    2015-11-01

    A new concept of a neutron absorption material (i.e., an artificial rare earth compound) was introduced for criticality control in a spent fuel storage system. In particular, spent nuclear fuels were considered as a potential source of rare earth elements because the nuclear fission of uranium produces a full range of nuclides. It was also found that an artificial rare earth compound (RE2O3) as a High-Level Waste (HLW) was naturally extracted from pyroprocessing technology developed for recovering uranium and transuranic elements (TRU) from spent fuels. In this study, various characteristics (e.g., activity, neutron absorption cross-section) were analyzed for validating the application possibility of this waste compound as a neutron absorption material. As a result, the artificial rare earth compound had a higher neutron absorption probability in the entire energy range, and it can be used for maintaining sub-criticality for more than 40 years on the basis of the neutron absorption capability of Boral™. Therefore, this approach is expected to vastly improve the efficiency of radioactive waste management by simultaneously keeping HLW and spent nuclear fuel in a restricted space. Copyright © 2015 Elsevier Ltd. All rights reserved.

  2. A study on artificial rare earth (RE2O3) based neutron absorber

    International Nuclear Information System (INIS)

    KIM, Kyung-O; Kyung KIM, Jong

    2015-01-01

    A new concept of a neutron absorption material (i.e., an artificial rare earth compound) was introduced for criticality control in a spent fuel storage system. In particular, spent nuclear fuels were considered as a potential source of rare earth elements because the nuclear fission of uranium produces a full range of nuclides. It was also found that an artificial rare earth compound (RE 2 O 3 ) as a High-Level Waste (HLW) was naturally extracted from pyroprocessing technology developed for recovering uranium and transuranic elements (TRU) from spent fuels. In this study, various characteristics (e.g., activity, neutron absorption cross-section) were analyzed for validating the application possibility of this waste compound as a neutron absorption material. As a result, the artificial rare earth compound had a higher neutron absorption probability in the entire energy range, and it can be used for maintaining sub-criticality for more than 40 years on the basis of the neutron absorption capability of Boral™. Therefore, this approach is expected to vastly improve the efficiency of radioactive waste management by simultaneously keeping HLW and spent nuclear fuel in a restricted space. - Highlights: • Quantitative analysis of rare earth elements in PWR spent fuels. • Extraction of artificial rare earth compound using pyroprocessing technology. • Characteristic analysis of artificial rare earth elements. • Performance evaluation of artificial rare earth for criticality control.

  3. Neutron diffraction studies on structural and magnetic properties of RE2NiGe3 (RE=La, Ce)

    International Nuclear Information System (INIS)

    Kalsi, Deepti; Rayaprol, S.; Siruguri, V.; Peter, Sebastian C.

    2014-01-01

    We report the crystallographic properties of RE 2 NiGe 3 (RE=La, Ce) synthesized by arc melting. Rietveld refinement on the powder neutron diffraction (ND) data suggest both compounds are isostructural and crystallize in the non-centrosymmetric Er 2 RhSi 3 type structure having hexagonal space group P6 ¯ 2c. In the crystal structure of RE 2 NiGe 3 , two dimensional arrangements of nickel and germanium atoms lead to the formation of hexagonal layers with rare earth atoms sandwiched between them. Magnetic susceptibility measurements performed in low fields exhibit antiferromagnetic ordering in cerium compound around (T o =) 3.2 K. Neutron diffraction measurements at 2.8 K (i.e., at TRE 2 NiGe 3 (RE=La, Ce) crystallize in the ordered superstructure of the AlB 2 type. Magnetic susceptibility measurements exhibit antiferromagnetic ordering in Ce 2 NiGe 3 . Structure and magnetism of RE 2 NiGe 3 (RE=La, Ce) are studied by neutron diffraction

  4. Novice Nurses’ Perception of Working Night Shifts: A Qualitative Study

    Directory of Open Access Journals (Sweden)

    Mohsen Faseleh Jahromi

    2013-08-01

    Full Text Available Introduction: Nursing is always accompanied by shift working and nurses in Iran have to work night shifts in some stages of their professional life. Therefore, the present study aimed to describe the novice nurses’ perception of working night shifts. Methods: The present qualitative study was conducted on 20 novice nurses working in two university hospitals of Jahrom, Iran. The study data were collected through focus group interviews. All the interviews were recorded, transcribed, and analyzed using constant comparative analysis and qualitative content analysis. Results: The study findings revealed five major themes of value system, physical and psychological problems, social relationships, organizational problems, and appropriate opportunity. Conclusion: The study presented a deep understanding of the novice nurses’ perception of working night shifts, which can be used by the managers as a basis for organizing health and treatment systems.

  5. Night myopia studied with an adaptive optics visual analyzer.

    Directory of Open Access Journals (Sweden)

    Pablo Artal

    Full Text Available PURPOSE: Eyes with distant objects in focus in daylight are thought to become myopic in dim light. This phenomenon, often called "night myopia" has been studied extensively for several decades. However, despite its general acceptance, its magnitude and causes are still controversial. A series of experiments were performed to understand night myopia in greater detail. METHODS: We used an adaptive optics instrument operating in invisible infrared light to elucidate the actual magnitude of night myopia and its main causes. The experimental setup allowed the manipulation of the eye's aberrations (and particularly spherical aberration as well as the use of monochromatic and polychromatic stimuli. Eight subjects with normal vision monocularly determined their best focus position subjectively for a Maltese cross stimulus at different levels of luminance, from the baseline condition of 20 cd/m(2 to the lowest luminance of 22 × 10(-6 cd/m(2. While subjects performed the focusing tasks, their eye's defocus and aberrations were continuously measured with the 1050-nm Hartmann-Shack sensor incorporated in the adaptive optics instrument. The experiment was repeated for a variety of controlled conditions incorporating specific aberrations of the eye and chromatic content of the stimuli. RESULTS: We found large inter-subject variability and an average of -0.8 D myopic shift for low light conditions. The main cause responsible for night myopia was the accommodation shift occurring at low light levels. Other factors, traditionally suggested to explain night myopia, such as chromatic and spherical aberrations, have a much smaller effect in this mechanism. CONCLUSIONS: An adaptive optics visual analyzer was applied to study the phenomenon of night myopia. We found that the defocus shift occurring in dim light is mainly due to accommodation errors.

  6. Attachment and Infant Night Waking: A Longitudinal Study From Birth Through the First Year of Life

    NARCIS (Netherlands)

    Beijers, R.; Jansen, J.; Riksen-Walraven, J.M.A.; Weerth, C. de

    2011-01-01

    Objective: Night wakings are common in infancy. Although a link between infant night wakings and attachment to the primary caregiver has been previously proposed, empirical support is limited so far. The aim of this longitudinal study was to examine the early history of night waking in infants who

  7. Timing of food intake during simulated night shift impacts glucose metabolism: A controlled study.

    Science.gov (United States)

    Grant, Crystal L; Coates, Alison M; Dorrian, Jillian; Kennaway, David J; Wittert, Gary A; Heilbronn, Leonie K; Pajcin, Maja; Della Vedova, Chris; Gupta, Charlotte C; Banks, Siobhan

    2017-01-01

    Eating during the night may increase the risk for obesity and type 2 diabetes in shift workers. This study examined the impact of either eating or not eating a meal at night on glucose metabolism. Participants underwent four nights of simulated night work (SW1-4, 16:00-10:00 h, night (NE; n = 4, meals; 07:00, 19:00 and 01:30 h) or not eating at night (NEN; n = 7, meals; 07:00 h, 09:30, 16:10 and 19:00 h) condition. Meal tolerance tests were conducted post breakfast on pre-night shift (PRE), SW4 and following return to day shift (RTDS), and glucose and insulin area under the curve (AUC) were calculated. Mixed-effects ANOVAs were used with fixed effects of condition and day, and their interactions, and a random effect of subject identifier on the intercept. Fasting glucose and insulin were not altered by day or condition. There were significant effects of day and condition × day (both p night (p = 0.040) and not eating at night (p = 0.006) conditions. Results in this small, healthy sample suggest that not eating at night may limit the metabolic consequences of simulated night work. Further study is needed to explore whether matching food intake to the biological clock could reduce the burden of type 2 diabetes in shift workers.

  8. Sleep and recovery in physicians on night call: a longitudinal field study

    Directory of Open Access Journals (Sweden)

    Malmberg Birgitta

    2010-08-01

    Full Text Available Abstract Background It is well known that physicians' night-call duty may cause impaired performance and adverse effects on subjective health, but there is limited knowledge about effects on sleep duration and recovery time. In recent years occupational stress and impaired well-being among anaesthesiologists have been frequently reported for in the scientific literature. Given their main focus on handling patients with life-threatening conditions, when on call, one might expect sleep and recovery to be negatively affected by work, especially in this specialist group. The aim of the present study was to examine whether a 16-hour night-call schedule allowed for sufficient recovery in anaesthesiologists compared with other physician specialists handling less life-threatening conditions, when on call. Methods Sleep, monitored by actigraphy and Karolinska Sleep Diary/Sleepiness Scale on one night after daytime work, one night call, the following first and second nights post-call, and a Saturday night, was compared between 15 anaesthesiologists and 17 paediatricians and ear, nose, and throat surgeons. Results Recovery patterns over the days after night call did not differ between groups, but between days. Mean night sleep for all physicians was 3 hours when on call, 7 h both nights post-call and Saturday, and 6 h after daytime work (p Conclusions Despite considerable sleep loss during work on night call, and unexpectedly short sleep after ordinary day work, the physicians' self-reports indicate full recovery after two nights' sleep. We conclude that these 16-hour night duties were compatible with a short-term recovery in both physician groups, but the limited sleep duration in general still implies a long-term health concern. These results may contribute to the establishment of safe working hours for night-call duty in physicians and other health-care workers.

  9. Night work and prostate cancer in men: a Swedish prospective cohort study.

    Science.gov (United States)

    Åkerstedt, Torbjrn; Narusyte, Jurgita; Svedberg, Pia; Kecklund, Göran; Alexanderson, Kristina

    2017-06-08

    Prostate cancer is the most common cancer and the second leading cause of cancer-related deaths among men, but the contributing factors are unclear. One such may be night work because of the day/night alternation of work and the resulting disturbance of the circadian system. The purpose of the present study was to investigate the prospective relation between number of years with night work and prostate cancer in men. Cohort study comparing night and day working twins with respect to incident prostate cancer in 12 322 men. Individuals in the Swedish Twin Registry. 12 322 male twins. Prostate cancer diagnoses obtained from the Swedish Cancer Registry with a follow-up time of 12 years, with a total number of cases=454. Multiple Cox proportional hazard regression analysis, adjusted for a number of covariates, showed no association between ever night work and prostate cancer, nor for duration of night work and prostate cancer. Analysis of twin pairs discordant for prostate cancer (n=332) showed no significant association between night work and prostate cancer. The results, together with previous studies, suggest that night work does not seem to constitute a risk factor for prostate cancer. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  10. Night work and health status of nurses and midwives. cross-sectional study.

    Science.gov (United States)

    Burdelak, Weronika; Bukowska, Agnieszka; Krysicka, Jolanta; Pepłońska, Beata

    2012-01-01

    The aim of this study was to assess the association between night shift work and the prevalence of diseases and conditions among nurses and midwives. The study included 725 subjects (354 working on night shifts and 371 working only during the day). The data were collected via an interview based on the "Standard Shiftwork Index". We analyzed the frequency of diseases and conditions and the relative risk expressed as the odds ratio (adjusted for important confounding factors). The most common diseases in the study population were chronic back pain (47.2%), hypertension (24.5%) and thyroid diseases (21.2%). We found no statistically significant increased relative risk of any diseases and conditions among the night shift nurses, compared to the day shift ones. The duration of the work performed on night shifts was significantly associated with the relative risk of thyroid diseases--increased almost two times in the women working for 15 or more years in such system (p for trend: 0.031). The analysis showed the significantly increased (more than eight times higher) relative risk of feet swelling in the women with 8 or more night duties per month, compared to the women having fewer night shifts. We did not observe a higher frequency of diseases in the night shift nurses, compared to the day shift nurses. These results may be related to the so-called "Healthy Worker Effect". There is a need for further long-term observational studies in the populations of nurses.

  11. Attachment and infant night waking: a longitudinal study from birth through the first year of life.

    Science.gov (United States)

    Beijers, Roseriet; Jansen, Jarno; Riksen-Walraven, Marianne; de Weerth, Carolina

    2011-11-01

    : Night wakings are common in infancy. Although a link between infant night wakings and attachment to the primary caregiver has been previously proposed, empirical support is limited so far. The aim of this longitudinal study was to examine the early history of night waking in infants who were later classified as securely or insecurely (avoidantly, resistantly, or disorganized) attached. : Participants in the study were 193 infants and their mothers. Information on infant night wakings was collected with the use of daily sleep diaries for the first 6 months of life and again for 2 weeks at 12 months of age. Infant-mother attachment was assessed using the Strange Situation (Ainsworth et al, Patterns of Attachment: A Psychological Study of the Strange Situation. New York: Hillsdale; 1978) when the infants were 12 months of age. : Longitudinal regression analyses showed that, after controlling for many covariates, infants with an insecure-resistant attachment at 12 months of age awoke more during the night in their first 6 months of life than the other infants. Furthermore, infants with different attachment classifications developed different patterns of night wakings over the first 6 months, with the insecure-avoidant infants waking the least toward the end of the 6 months. Hierarchical multiple regression analyses showed no associations between attachment and night wakings at 12 months of age. : This study is the first in showing that attachment at 12 months of age is related to infant night waking patterns in the first 6 months of life. Patterns of infant night wakings early in life apparently reflect the emerging attachment relationship.

  12. Night shift work and stomach cancer risk in the MCC-Spain study.

    Science.gov (United States)

    Gyarmati, Georgina; Turner, Michelle C; Castaño-Vinyals, Gemma; Espinosa, Ana; Papantoniou, Kyriaki; Alguacil, Juan; Costas, Laura; Pérez-Gómez, Beatriz; Martin Sanchez, Vicente; Ardanaz, Eva; Moreno, Victor; Gómez-Acebo, Inés; Fernández-Tardon, Guillermo; Villanueva Ballester, Vicent; Capelo, Rocio; Chirlaque, Maria-Dolores; Santibáñez, Miguel; Pollán, Marina; Aragonés, Nuria; Kogevinas, Manolis

    2016-08-01

    Night shift work has been classified as a probable human carcinogen by the International Agency for Research on Cancer, based on experimental studies and limited evidence on human breast cancer risk. Evidence at other cancer sites is scarce. We evaluated the association between night shift work and stomach cancer risk in a population-based case-control study. A total of 374 incident stomach adenocarcinoma cases and 2481 population controls were included from the MCC-Spain study. Detailed data on lifetime night shift work were collected including permanent and rotating shifts, and their cumulative duration (years). Adjusted unconditional logistic regression models were used in analysis. A total of 25.7% of cases and 22.5% of controls reported ever being a night shift worker. There was a weak positive, non-significant association between ever having had worked for at least 1 year in permanent night shifts and stomach cancer risk compared to never having worked night shifts (OR=1.2, 95% CI 0.9 to 1.8). However, there was an inverse 'U' shaped relationship with cumulative duration of permanent night shifts, with the highest risk observed in the intermediate duration category (OR 10-20 years=2.0, 95% CI 1.1 to 3.6) (p for trend=0.19). There was no association with ever having had worked in rotating night shifts (OR=0.9, 95% CI 0.6 to 1.2) and no trend according to cumulative duration (p for trend=0.68). We found no clear evidence concerning an association between night shift work and stomach cancer risk. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

  13. Current and cumulative night shift work and subclinical atherosclerosis: results of the Gutenberg Health Study.

    Science.gov (United States)

    Jankowiak, S; Backé, E; Liebers, F; Schulz, A; Hegewald, J; Garthus-Niegel, S; Nübling, M; Blankenberg, S; Pfeiffer, N; Lackner, K J; Beutel, M; Blettner, M; Münzel, T; Wild, P S; Seidler, A; Letzel, S; Latza, U

    2016-11-01

    The study examines the association between exposure to current and cumulative night shift work and subclinical parameters of atherosclerosis. Participants of a population-based cohort study (the Gutenberg Health Study, N = 15,010) aged 35-64 years were examined at baseline (2007-2012). Investigations included measurements of arterial stiffness, vascular function [reactive hyperaemia (RH) index], and intima media thickness (IMT). Also, a complete job history (including up to 15 periods), occupational exposures, a variety of lifestyle, and dispositional variables were enquired. Night shift work was performed by 1071 out of 8065 currently employed individuals. The strongest association after adjustment for age, sex, job complexity level, being a manager, overtime work, and noise appeared for more than 660 night shifts within the last 10 years and a significantly increased arterial stiffness of 0.33 m/s. This reflects a 4 % flow velocity increase for individuals with more than 660 night shifts compared to non-night workers. Regarding the entire professional life, night shift workers showed a significantly decreased vascular function by -0.054 RH index points by using the same adjustment. IMT values did not differ statistically from non-night workers. Lifestyle and dispositional factors showed an influence on all used subclinical atherosclerosis parameters. The cross-sectional results demonstrate an association between night work and detrimental changes in the atherosclerotic process. The association is more pronounced with more years in night shift and is partly explained by lifestyle and dispositional factors. Longitudinal analyses are necessary to confirm the results.

  14. Is there a First Night Effect on Sleep Bruxism? A Sleep Laboratory Study

    Science.gov (United States)

    Hasegawa, Yoko; Lavigne, Gilles; Rompré, Pierre; Kato, Takafumi; Urade, Masahiro; Huynh, Nelly

    2013-01-01

    Study Objectives: Sleep bruxism (SB) is reported to vary in frequency over time. The aim of this study was to assess the first night effect on SB. Methods: A retrospective polysomnographic (PSG) analysis was performed of data from a sample of SB patients (12 females, 4 males; age range: 17-39 years) recorded in a sleep laboratory over 2 consecutive nights. Sleep parameters and jaw muscle activity variables (i.e., rhythmic masticatory muscle activity [RMMA]) for SB were quantified and compared between the 2 nights. Subjects were classified into groups according to severity of RMMA frequency, such as low frequency (2-4 episodes/h and/or bruxism time index, and mean burst duration (repeated measure ANOVAs, p ≤ 0.05). Five patients of 8 in the low frequency group were classified into the moderate-high frequency group on the second night, whereas only one patient in the moderate-high frequency group moved to the low frequency group. Conclusions: The results showed no overall first night effect on severity of RMMA frequency in young and healthy patients with SB. In clinical practice, one-night sleep recording may be sufficient for moderate-high frequency SB patients. However, low RMMA frequency in the first night could be confirmed by a second night based on the patient's medical and dental history. Citation: Hasegawa Y; Lavigne G; Rompré P; Kato T; Urade M; Huynh N. Is there a first night effect on sleep bruxism? A sleep laboratory study. J Clin Sleep Med 2013;9(11):1139-1145. PMID:24235894

  15. Night Shift Work and Risk of Depression: Meta-analysis of Observational Studies.

    Science.gov (United States)

    Lee, Aeyoung; Myung, Seung Kwon; Cho, Jung Jin; Jung, Yu Jin; Yoon, Jong Lull; Kim, Mee Young

    2017-07-01

    This study aimed to assess whether night shift work is associated with the risk of depression by using a meta-analysis of observational studies. We searched PubMed and EMBASE in August, 2016 to locate eligible studies and investigated the association between night shift work and the risk of depression, reporting outcome measures with adjusted odds ratios (ORs) or relative risks (RRs) and 95% confidence intervals (CIs). In the meta-analysis of a total of 11 observational studies with 9 cross-sectional study, 1 longitudinal study, and 1 cohort study, night shift work was significantly associated with an increased risk of depression (OR/RR, 1.43; 95% CI, 1.24-1.64; I² = 78.0%). Also, subgroup meta-analyses by gender, night shift work duration, type of occupation, continent, and type of publication showed that night shift work was consistently associated with the increased risk of depression. The current meta-analysis suggests that night shift work is associated with the increased risk of depression. However, further large prospective cohort studies are needed to confirm this association. © 2017 The Korean Academy of Medical Sciences.

  16. The Halden Reactor Project Workshop on Studies of Operator Performance During Night Shift's

    International Nuclear Information System (INIS)

    Morisseau, Dolores S.; Braarud, Per Oeyvind; Collier, Steve; Droeivoldsmo, Asgeir; Larsen, Marit; Lirvall, Peter

    1996-01-01

    A workshop on Studies of Operator Performance during Nights Shifts was organised in Halden, February 27-28, 1996. The purpose of the workshop was to discuss and make recommendations on specific needs for the study of operator cognitive performance at night and identify the relevant research issues for which Halden could provide resolution. The workshop began with presentations by several invited speakers with expertise in studies of shift work and was then divided into three working groups that discussed the following issues in parallel: (1) Lines of Research to Be Pursued; (2) Methods and Measures to Be Used in Research on Cognitive Performance at Nights; and (3) Products of the Research on Operator Performance at Night. Each group produced specific recommendations that were summarised by the group's facilitator in a joint session of the workshop. This report summarises the presentation of the invited speakers, and the discussions and recommendations of the individual working groups. (author)

  17. Does neonatal pain management in intensive care units differ between night and day? An observational study.

    Science.gov (United States)

    Guedj, Romain; Danan, Claude; Daoud, Patrick; Zupan, Véronique; Renolleau, Sylvain; Zana, Elodie; Aizenfisz, Sophie; Lapillonne, Alexandre; de Saint Blanquat, Laure; Granier, Michèle; Durand, Philippe; Castela, Florence; Coursol, Anne; Hubert, Philippe; Cimerman, Patricia; Anand, K J S; Khoshnood, Babak; Carbajal, Ricardo

    2014-02-20

    To determine whether analgesic use for painful procedures performed in neonates in the neonatal intensive care unit (NICU) differs during nights and days and during each of the 6 h period of the day. Conducted as part of the prospective observational Epidemiology of Painful Procedures in Neonates study which was designed to collect in real time and around-the-clock bedside data on all painful or stressful procedures. 13 NICUs and paediatric intensive care units in the Paris Region, France. All 430 neonates admitted to the participating units during a 6-week period between September 2005 and January 2006. During the first 14 days of admission, data were collected on all painful procedures and analgesic therapy. The five most frequent procedures representing 38 012 of all 42 413 (90%) painful procedures were analysed. Observational study. We compared the use of specific analgesic for procedures performed during each of the 6 h period of a day: morning (7:00 to 12:59), afternoon, early night and late night and during daytime (morning+afternoon) and night-time (early night+late night). 7724 of 38 012 (20.3%) painful procedures were carried out with a specific analgesic treatment. For morning, afternoon, early night and late night, respectively, the use of analgesic was 25.8%, 18.9%, 18.3% and 18%. The relative reduction of analgesia was 18.3%, pnight-time and 28.8%, pday. Parental presence, nurses on 8 h shifts and written protocols for analgesia were associated with a decrease in this difference. The substantial differences in the use of analgesics around-the-clock may be questioned on quality of care grounds.

  18. Disentangling the effects of insomnia and night work on cardiovascular diseases: a study in nursing professionals

    Energy Technology Data Exchange (ETDEWEB)

    Silva-Costa, A. [Escola Nacional de Saúde Pública, Fundação Oswaldo Cruz (Fiocruz), Rio de Janeiro, RJ (Brazil); Griep, R.H.; Rotenberg, L. [Laboratório de Educação em Ambiente e Saúde, Instituto Oswaldo Cruz (Fiocruz), Rio de Janeiro, RJ (Brazil)

    2014-11-21

    Cardiovascular diseases (CVDs) are known to be associated with poor sleep quality in general populations, but they have not been consistently associated with specific work schedules. Studies of CVD generally do not simultaneously consider sleep and work schedules, but that approach could help to disentangle their effects. We investigated the association between insomnia and a self-reported physician diagnosis of CVD in day and night workers, considering all sleep episodes during nocturnal and diurnal sleep. A cross-sectional study was conducted in 1307 female nursing professionals from 3 public hospitals, using baseline data from the “Health and Work in Nursing - a Cohort Study.” Participants were divided into two groups: i) day workers with no previous experience in night shifts (n=281) and whose data on insomnia were related to nocturnal sleep and ii) those who worked exclusively at night (n=340) and had data on both nocturnal and diurnal sleep episodes, as they often sleep at daytime. Multiple logistic regression analysis was performed. Among day workers, insomnia complaints increased the odds of CVD 2.79-fold (95% CI=1.01-6.71) compared with workers who had no complaints. Among night workers, reports of insomnia during both nocturnal and diurnal sleep increased the odds of reported CVD 3.07-fold (95% CI=1.30-7.24). Workers with insomnia had similar probabilities of reporting CVD regardless of their work schedule, suggesting a relationship to insomnia and not to night work per se. The results also highlighted the importance of including evaluation of all sleep episodes (diurnal plus nocturnal sleep) for night workers.

  19. Disentangling the effects of insomnia and night work on cardiovascular diseases: a study in nursing professionals

    International Nuclear Information System (INIS)

    Silva-Costa, A.; Griep, R.H.; Rotenberg, L.

    2014-01-01

    Cardiovascular diseases (CVDs) are known to be associated with poor sleep quality in general populations, but they have not been consistently associated with specific work schedules. Studies of CVD generally do not simultaneously consider sleep and work schedules, but that approach could help to disentangle their effects. We investigated the association between insomnia and a self-reported physician diagnosis of CVD in day and night workers, considering all sleep episodes during nocturnal and diurnal sleep. A cross-sectional study was conducted in 1307 female nursing professionals from 3 public hospitals, using baseline data from the “Health and Work in Nursing - a Cohort Study.” Participants were divided into two groups: i) day workers with no previous experience in night shifts (n=281) and whose data on insomnia were related to nocturnal sleep and ii) those who worked exclusively at night (n=340) and had data on both nocturnal and diurnal sleep episodes, as they often sleep at daytime. Multiple logistic regression analysis was performed. Among day workers, insomnia complaints increased the odds of CVD 2.79-fold (95% CI=1.01-6.71) compared with workers who had no complaints. Among night workers, reports of insomnia during both nocturnal and diurnal sleep increased the odds of reported CVD 3.07-fold (95% CI=1.30-7.24). Workers with insomnia had similar probabilities of reporting CVD regardless of their work schedule, suggesting a relationship to insomnia and not to night work per se. The results also highlighted the importance of including evaluation of all sleep episodes (diurnal plus nocturnal sleep) for night workers

  20. Disentangling the effects of insomnia and night work on cardiovascular diseases: a study in nursing professionals

    Directory of Open Access Journals (Sweden)

    A. Silva-Costa

    2015-02-01

    Full Text Available Cardiovascular diseases (CVDs are known to be associated with poor sleep quality in general populations, but they have not been consistently associated with specific work schedules. Studies of CVD generally do not simultaneously consider sleep and work schedules, but that approach could help to disentangle their effects. We investigated the association between insomnia and a self-reported physician diagnosis of CVD in day and night workers, considering all sleep episodes during nocturnal and diurnal sleep. A cross-sectional study was conducted in 1307 female nursing professionals from 3 public hospitals, using baseline data from the “Health and Work in Nursing - a Cohort Study.” Participants were divided into two groups: i day workers with no previous experience in night shifts (n=281 and whose data on insomnia were related to nocturnal sleep and ii those who worked exclusively at night (n=340 and had data on both nocturnal and diurnal sleep episodes, as they often sleep at daytime. Multiple logistic regression analysis was performed. Among day workers, insomnia complaints increased the odds of CVD 2.79-fold (95% CI=1.01-6.71 compared with workers who had no complaints. Among night workers, reports of insomnia during both nocturnal and diurnal sleep increased the odds of reported CVD 3.07-fold (95% CI=1.30-7.24. Workers with insomnia had similar probabilities of reporting CVD regardless of their work schedule, suggesting a relationship to insomnia and not to night work per se. The results also highlighted the importance of including evaluation of all sleep episodes (diurnal plus nocturnal sleep for night workers.

  1. Night work, long work weeks, and risk of accidental injuries. A register-based study.

    Science.gov (United States)

    Larsen, Ann D; Hannerz, Harald; Møller, Simone V; Dyreborg, Johnny; Bonde, Jens Peter; Hansen, Johnni; Kolstad, Henrik A; Hansen, Åse Marie; Garde, Anne Helene

    2017-11-01

    Objectives The aims of this study were to (i) investigate the association between night work or long work weeks and the risk of accidental injuries and (ii) test if the association is affected by age, sex or socioeconomic status. Methods The study population was drawn from the Danish version of the European Labour Force Survey from 1999-2013. The current study was based on 150 438 participants (53% men and 47% women). Data on accidental injuries were obtained at individual level from national health registers. We included all 20-59-year-old employees working ≥32 hours a week at the time of the interview. We used Poisson regression to estimate the relative rates (RR) of accidental injuries as a function of night work or long work weeks (>40 hours per week) adjusted for year of interview, sex, age, socioeconomic status (SES), industry, and weekly working hours or night work. Age, sex and SES were included as two-way interactions. Results We observed 23 495 cases of accidental injuries based on 273 700 person years at risk. Exposure to night work was statistically significantly associated with accidental injuries (RR 1.11, 99% CI 1.06-1.17) compared to participants with no recent night work. No associations were found between long work weeks (>40 hours) and accidental injuries. Conclusion We found a modest increased risk of accidental injuries when reporting night work. No associations between long work weeks and risk of accidental injuries were observed. Age, sex and SES showed no trends when included as two-way interactions.

  2. Night work, long work weeks, and risk of accidental injuries. A register-based study

    DEFF Research Database (Denmark)

    Larsen, Ann D; Hannerz, Harald; Møller, Simone V

    2017-01-01

    of the European Labour Force Survey from 1999-2013. The current study was based on 150 438 participants (53% men and 47% women). Data on accidental injuries were obtained at individual level from national health registers. We included all 20-59-year-old employees working ≥32 hours a week at the time...... of the interview. We used Poisson regression to estimate the relative rates (RR) of accidental injuries as a function of night work or long work weeks (>40 hours per week) adjusted for year of interview, sex, age, socioeconomic status (SES), industry, and weekly working hours or night work. Age, sex and SES were....... No associations were found between long work weeks (>40 hours) and accidental injuries. Conclusion: We found a modest increased risk of accidental injuries when reporting night work. No associations between long work weeks and risk of accidental injuries were observed. Age, sex and SES showed no trends when...

  3. A comparative study of blood alcohol concentrations in Australian night-time entertainment districts.

    Science.gov (United States)

    Miller, Peter; Pennay, Amy; Droste, Nicolas; Butler, Erin; Jenkinson, Rebecca; Hyder, Shannon; Quinn, Brendan; Chikritzhs, Tanya; Tomsen, Stephen; Wadds, Phillip; Jones, Sandra C; Palmer, Darren; Barrie, Lance; Lam, Tina; Gilmore, William; Lubman, Dan I

    2014-07-01

    There is little research describing how intoxication levels change throughout the night in entertainment districts. This research aims to describe levels of alcohol intoxication across multiple Australian metropolitan and regional nightlife districts. This study was conducted in the night-time entertainment districts of three metropolitan cities (Sydney, Melbourne and Perth) and two regional cities (Wollongong and Geelong) in Australia. Data collection occurred approximately fortnightly in each city on a Friday or Saturday night between 8 pm and 5 am. Brief structured interviews (3-10 min) and breathalyser tests were undertaken in busy thoroughfares over six months. Of the 7037 individuals approached to participate in the study, 6998 [61.8% male, mean age 24.89 years (standard deviation 6.37; range 18-73)] agreed to be interviewed. There was a linear increase in blood alcohol concentration (BAC) levels throughout the night. Post hoc testing revealed significantly more highly intoxicated participants (i.e. BAC above 0.10 mg of alcohol per 100 mL of blood) after midnight (P gender differences disappeared by 3 am. There was no age differences in intoxication earlier in the night, but after midnight, patrons over the age of 21 showed increasing BAC levels. There is a consistent trend across the cities of high to very high levels of intoxication later in the night, with trends after midnight being significantly different to those before. © 2014 Australasian Professional Society on Alcohol and other Drugs.

  4. What is the preferred number of consecutive night shifts? results from a crossover intervention study among police officers in Denmark.

    Science.gov (United States)

    Nabe-Nielsen, Kirsten; Jensen, Marie Aarrebo; Hansen, Åse Marie; Kristiansen, Jesper; Garde, Anne Helene

    2016-10-01

    Among police officers in Denmark, we studied (i) how many consecutive night shifts participants preferred at baseline; (ii) preferences regarding three intervention conditions (two, four, and seven consecutive night shifts followed by the same number of days off/day shifts: '2 + 2', '4 + 4', '7 + 7') at follow-up; (iii) characteristics of participants preferring each of these intervention conditions. Questionnaire data from a crossover intervention study were used (baseline: n = 73; follow-up: n = 68). At baseline, 49% preferred four consecutive night shifts. At follow-up, 57% preferred '4 + 4', 26% preferred '2 + 2' and 26% preferred '7 + 7'. Participants, who preferred longer spells of night work experienced that night work was less demanding, found it easier to sleep at different times of the day, and were more frequently evening types compared with participants who preferred shorter spells of night work. The participants' preferences are likely to be influenced by their previous shift work experience. Practitioner Summary: We investigated police officers' preferences regarding the number of consecutive night shifts. The majority preferred four consecutive night shifts. Those who preferred the longer spells of night work found night work less demanding, found it easier to sleep at different times of the day, and were more frequently evening types.

  5. QUOTAC: QUestionnaire On day and night Time respiratory symptoms in Asthmatic Children -- a validity study

    NARCIS (Netherlands)

    van Zaane, B.; Droog, R. P.; Stouthard, M. E. A.; van Aalderen, W. M. C.

    2007-01-01

    The aim of this study was to validate the QUOTAC, a questionnaire on day and night time respiratory symptoms in asthmatic children. Validity was examined by measuring agreement between the QUOTAC and a self-report diary in children aged 6 to 16 years, divided in an asthma group and a control group.

  6. Associations Among Rotating Night Shift Work, Sleep, and Skin Cancer in Nurses’ Health Study II Participants

    Science.gov (United States)

    Heckman, Carolyn J.; Kloss, Jacqueline D.; Feskanich, Diane; Culnan, Elizabeth; Schernhammer, Eva S.

    2016-01-01

    Background Night shift work and sleep duration have been associated with breast and other cancers. Results from the few prior studies of night shift work and skin cancer risk have been mixed and not fully accounted for other potentially important health-related variables (e.g., sleep characteristics). This study evaluated the relationship between rotating night shift work and skin cancer risk and included additional skin cancer risk factors and sleep-related variables. Methods The current study used data from 74,323 Nurses’ Health Study (NHS) II participants. Cox proportional hazards models were used to estimate multivariable-adjusted hazard ratios (HRs) and 95% confidence intervals (CIs) for skin cancers across categories of shift work and sleep duration. Results Over 10 years of follow-up, 4308 BCC, 334 SCC and 212 melanoma cases were identified. Longer duration of rotating night shifts was associated with a linear decline in risk of BCC (HR=0.93, 95% CI: 0.90-0.97 per 5-year increase). Shift work was not significantly associated with either melanoma (HR=1.02, 95% CI: 0.86-1.21) or SCC (HR=0.92, 95% CI: 0.80-1.06). A short sleep duration (≤6 hours per day) was associated with lower risks of melanoma (HR=0.68, 95% CI: 0.46-0.98) and BCC (HR=0.93, 95% CI: 0.86-1.00) compared with the most common report of 7 hours. SCC was not associated with duration of sleep (HR=0.94, 95% CI: 0.83-1.06). Conclusions Longer duration of rotating night shift work and shorter sleep duration were associated with lower risk of some skin cancers. Further research is needed to confirm and identify the mechanisms underlying these associations. PMID:27663986

  7. Night Shift Work and Breast Cancer Incidence: Three Prospective Studies and Meta-analysis of Published Studies.

    Science.gov (United States)

    Travis, Ruth C; Balkwill, Angela; Fensom, Georgina K; Appleby, Paul N; Reeves, Gillian K; Wang, Xiao-Si; Roddam, Andrew W; Gathani, Toral; Peto, Richard; Green, Jane; Key, Timothy J; Beral, Valerie

    2016-12-01

    It has been proposed that night shift work could increase breast cancer incidence. A 2007 World Health Organization review concluded, mainly from animal evidence, that shift work involving circadian disruption is probably carcinogenic to humans. We therefore aimed to generate prospective epidemiological evidence on night shift work and breast cancer incidence. Overall, 522 246 Million Women Study, 22 559 EPIC-Oxford, and 251 045 UK Biobank participants answered questions on shift work and were followed for incident cancer. Cox regression yielded multivariable-adjusted breast cancer incidence rate ratios (RRs) and 95% confidence intervals (CIs) for night shift work vs no night shift work, and likelihood ratio tests for interaction were used to assess heterogeneity. Our meta-analyses combined these and relative risks from the seven previously published prospective studies (1.4 million women in total), using inverse-variance weighted averages of the study-specific log RRs. In the Million Women Study, EPIC-Oxford, and UK Biobank, respectively, 673, 28, and 67 women who reported night shift work developed breast cancer, and the RRs for any vs no night shift work were 1.00 (95% CI = 0.92 to 1.08), 1.07 (95% CI = 0.71 to 1.62), and 0.78 (95% CI = 0.61 to 1.00). In the Million Women Study, the RR for 20 or more years of night shift work was 1.00 (95% CI = 0.81 to 1.23), with no statistically significant heterogeneity by sleep patterns or breast cancer risk factors. Our meta-analysis of all 10 prospective studies included 4660 breast cancers in women reporting night shift work; compared with other women, the combined relative risks were 0.99 (95% CI = 0.95 to 1.03) for any night shift work, 1.01 (95% CI = 0.93 to 1.10) for 20 or more years of night shift work, and 1.00 (95% CI = 0.87 to 1.14) for 30 or more years. The totality of the prospective evidence shows that night shift work, including long-term shift work, has little or no effect on

  8. Night Shift Work and Breast Cancer Incidence: Three Prospective Studies and Meta-analysis of Published Studies

    OpenAIRE

    Travis, Ruth C.; Balkwill, Angela; Fensom, Georgina K.; Appleby, Paul N.; Reeves, Gillian K.; Wang, Xiao-Si; Roddam, Andrew W.; Gathani, Toral; Peto, Richard; Green, Jane; Key, Timothy J.; Beral, Valerie

    2016-01-01

    Background: It has been proposed that night shift work could increase breast cancer incidence. A 2007 World Health Organization review concluded, mainly from animal evidence, that shift work involving circadian disruption is probably carcinogenic to humans. We therefore aimed to generate prospective epidemiological evidence on night shift work and breast cancer incidence. Methods: Overall, 522 246 Million Women Study, 22 559 EPIC-Oxford, and 251 045 UK Biobank participants answered questions ...

  9. EEG Changes across Multiple Nights of Sleep Restriction and Recovery in Adolescents: The Need for Sleep Study.

    Science.gov (United States)

    Ong, Ju Lynn; Lo, June C; Gooley, Joshua J; Chee, Michael W L

    2016-06-01

    To investigate sleep EEG changes in adolescents across 7 nights of sleep restriction to 5 h time in bed [TIB]) and 3 recovery nights of 9 h TIB. A parallel-group design, quasi-laboratory study was conducted in a boarding school. Fifty-five healthy adolescents (25 males, age = 15-19 y) who reported habitual TIBs of approximately 6 h on week nights (group average) but extended their sleep on weekends were randomly assigned to Sleep Restriction (SR) or Control groups. Participants underwent a 2-week protocol comprising 3 baseline nights (TIB = 9 h), 7 nights of sleep opportunity manipulation (TIB = 5 h for the SR and 9 h for the Control group), and 3 nights of recovery sleep (TIB = 9 h). Polysomnography was obtained on two baseline, three manipulation, and two recovery nights. Across the sleep restriction nights, total SWS duration was preserved relative to the 9 h baseline sleep opportunity, while other sleep stages were reduced. Considering only the first 5 h of sleep opportunity, SR participants had reduced N1 duration and wake after sleep onset (WASO), and increased total sleep time (TST), rapid eye movement (REM) sleep, and slow wave sleep (SWS) relative to baseline. Total REM sleep, N2, and TST duration remained above baseline levels by the third recovery sleep episode. In spite of preservation of SWS duration over multiple nights of sleep restriction, adolescents accustomed to curtailing nocturnal sleep on school day nights evidence residual effects on sleep macro-structure, even after three nights of recovery sleep. Older teenagers may not be as resilient to successive nights of sleep restriction as is commonly believed. © 2016 Associated Professional Sleep Societies, LLC.

  10. Rotating Night Shift Work and Risk of Type 2 Diabetes: Two Prospective Cohort Studies in Women

    Science.gov (United States)

    Pan, An; Schernhammer, Eva S.; Sun, Qi; Hu, Frank B.

    2011-01-01

    Background Rotating night shift work disrupts circadian rhythms and has been associated with obesity, metabolic syndrome, and glucose dysregulation. However, its association with type 2 diabetes remains unclear. Therefore, we aimed to evaluate this association in two cohorts of US women. Methods and Findings We followed 69,269 women aged 42–67 in Nurses' Health Study I (NHS I, 1988–2008), and 107,915 women aged 25–42 in NHS II (1989–2007) without diabetes, cardiovascular disease, and cancer at baseline. Participants were asked how long they had worked rotating night shifts (defined as at least three nights/month in addition to days and evenings in that month) at baseline. This information was updated every 2–4 years in NHS II. Self-reported type 2 diabetes was confirmed by a validated supplementary questionnaire. We documented 6,165 (NHS I) and 3,961 (NHS II) incident type 2 diabetes cases during the 18–20 years of follow-up. In the Cox proportional models adjusted for diabetes risk factors, duration of shift work was monotonically associated with an increased risk of type 2 diabetes in both cohorts. Compared with women who reported no shift work, the pooled hazard ratios (95% confidence intervals) for participants with 1–2, 3–9, 10–19, and ≥20 years of shift work were 1.05 (1.00–1.11), 1.20 (1.14–1.26), 1.40 (1.30–1.51), and 1.58 (1.43–1.74, p-value for trend night shift work is associated with a modestly increased risk of type 2 diabetes in women, which appears to be partly mediated through body weight. Proper screening and intervention strategies in rotating night shift workers are needed for prevention of diabetes. Please see later in the article for the Editors' Summary PMID:22162955

  11. An Exploratory Study of the Relationship between Night Eating Syndrome and Depression among College Students

    Science.gov (United States)

    Thompson, Sharon H.; DeBate, Rita DiGioacchino

    2010-01-01

    Night eating syndrome criteria include skipping breakfast, night eating, and sleep difficulties. It is associated with mood disturbances, particularly depression, and may contribute to later obesity development. Most research on night eating syndrome has focused on obese persons seeking weight loss treatment, and little is known about night eating…

  12. The Consortium for Dark Sky Studies: A Transdisciplinary Institute for Understanding the Loss of the Night

    Science.gov (United States)

    Barentine, John; Kieda, David; Goldsmith, Stephen; Foott, Bettymaya; Muir, Janet

    2018-01-01

    Research into the effects of artificial light at night (ALAN) has grown from a niche speciality into a broad field touching on aspects of life science, physics, astronomy, social science, and more, reflecting the highly interconnected subjects whose common characteristic is the alteration of the natural nighttime environment by anthropogenic light pollution. Until recently, there was no focal point for these diverse efforts to foster connections between researchers and initiate new topics of study in ALAN research. In 2016, the Consortium for Dark Sky Studies (CDSS), the world’s first organization dedicated to the study of the night and the influence of human nighttime activities on the integrity of natural darkness, was founded at the University of Utah. We describe the motivations for establishing the Consortium, its early activities, and initial outcomes of the effort.

  13. Nested case-control study of night shift work and breast cancer risk among women in the Danish military.

    Science.gov (United States)

    Hansen, Johnni; Lassen, Christina F

    2012-08-01

    Growing but limited evidence suggests that night shift work is associated with breast cancer. The authors conducted a nationwide case-control study nested within a cohort of 18,551 female military employees born in 1929-1968 to investigate the risk for breast cancer after night shift work and to explore the role of leisure time sun exposure and diurnal preference. The authors documented 218 cases of breast cancer (1990-2003) and selected 899 age-matched controls from the cohort by incidence density sampling. Information on shift work, sun exposure habits, diurnal preference and other potential confounders was obtained from a structured questionnaire. ORs were estimated by multivariate conditional logistic regression. Overall, the authors observed an adjusted OR of 1.4 (95% CI 0.9 to 2.1) among women with ever compared with never night shifts. The RR for breast cancer tended to increase with increasing number of years of night shift work (p=0.03) and with cumulative number of shifts (p=0.02),with a neutral risk for fewer than three night shifts per week. The OR for the group with the highest tertile of cumulative exposure was 2.3 (95% CI 1.2 to 4.6). The most pronounced effect of night shift work on breast cancer risk was observed in women with morning chronotype preference and intense night shifts (OR=3.9, 95% CI 1.6 to 9.5). Night shift workers tended to sunbathe more frequently than day workers. The results indicate that frequent night shift work increases the risk for breast cancer and suggest a higher risk with longer duration of intense night shifts. Women with morning preference who worked on night shifts tended to have a higher risk than those with evening preference.

  14. A Pilot Study to Examine the Relationship Between Napping and Fatigue in Nurses Practicing on the Night Shift.

    Science.gov (United States)

    Neville, Kathleen; Velmer, Gillian; Brown, Shari; Robol, Nancy

    2017-11-01

    The aim of this study is to explore the relationship of night-shift napping on fatigue. Nurses' fatigue, especially at night, interferes with quality of life and job performance and impacts safety and health. Night-shift nurses completed the Brief Fatigue Inventory and a demographic information sheet to determine differences in fatigue between nurses who napped during their night shift as compared with nurses who did not nap. No statistically significant differences in global fatigue were found; differences in rotating shift, age, and, gender were identified. Rotating shifts, a 2nd job, and caring for family predicted fatigue. Based on this pilot study, further investigations of fatigue among night-shift nurses are needed as well as evidence-based support to promote sleep.

  15. Influences on Dietary Choices during Day versus Night Shift in Shift Workers: A Mixed Methods Study.

    Science.gov (United States)

    Bonnell, Emily K; Huggins, Catherine E; Huggins, Chris T; McCaffrey, Tracy A; Palermo, Claire; Bonham, Maxine P

    2017-02-26

    Shift work is associated with diet-related chronic conditions such as obesity and cardiovascular disease. This study aimed to explore factors influencing food choice and dietary intake in shift workers. A fixed mixed method study design was undertaken on a convenience sample of firefighters who continually work a rotating roster. Six focus groups ( n = 41) were conducted to establish factors affecting dietary intake whilst at work. Dietary intake was assessed using repeated 24 h dietary recalls ( n = 19). Interviews were audio recorded, transcribed verbatim, and interpreted using thematic analysis. Dietary data were entered into FoodWorks and analysed using Wilcoxon signed-rank test; p night shift. Energy intakes (kJ/day) did not differ between days that included a day or night shift but greater energy density (ED energy , kJ/g/day) of the diet was observed on night shift compared with day shift. This study has identified a number of dietary-specific shift-related factors that may contribute to an increase in unhealthy behaviours in a shift-working population. Given the increased risk of developing chronic diseases, organisational change to support workers in this environment is warranted.

  16. Influences on Dietary Choices during Day versus Night Shift in Shift Workers: A Mixed Methods Study

    Science.gov (United States)

    Bonnell, Emily K.; Huggins, Catherine E.; Huggins, Chris T.; McCaffrey, Tracy A.; Palermo, Claire; Bonham, Maxine P.

    2017-01-01

    Shift work is associated with diet-related chronic conditions such as obesity and cardiovascular disease. This study aimed to explore factors influencing food choice and dietary intake in shift workers. A fixed mixed method study design was undertaken on a convenience sample of firefighters who continually work a rotating roster. Six focus groups (n = 41) were conducted to establish factors affecting dietary intake whilst at work. Dietary intake was assessed using repeated 24 h dietary recalls (n = 19). Interviews were audio recorded, transcribed verbatim, and interpreted using thematic analysis. Dietary data were entered into FoodWorks and analysed using Wilcoxon signed-rank test; p shift schedule; attitudes and decisions of co-workers; time and accessibility; and knowledge of the relationship between food and health. Participants reported consuming more discretionary foods and limited availability of healthy food choices on night shift. Energy intakes (kJ/day) did not differ between days that included a day or night shift but greater energy density (EDenergy, kJ/g/day) of the diet was observed on night shift compared with day shift. This study has identified a number of dietary-specific shift-related factors that may contribute to an increase in unhealthy behaviours in a shift-working population. Given the increased risk of developing chronic diseases, organisational change to support workers in this environment is warranted. PMID:28245625

  17. Queensland Alcohol-related violence and Night Time Economy Monitoring project (QUANTEM): a study protocol.

    Science.gov (United States)

    Miller, Peter G; Ferris, Jason; Coomber, Kerri; Zahnow, Renee; Carah, Nicholas; Jiang, Heng; Kypri, Kypros; Chikritzhs, Tanya; Clough, Alan; Livingston, Michael; de Andrade, Dominique; Room, Robin; Callinan, Sarah; Curtis, Ashlee; Mayshak, Richelle; Droste, Nicolas; Lloyd, Belinda; Matthews, Sharon; Taylor, Nicholas; Crane, Meredythe; Thorn, Michael; Najman, Jake

    2017-10-05

    Alcohol-related harm is a substantial burden on the community in Australia and internationally, particularly harm related to risky drinking practices of young people in the night-time economy. This protocol paper describes a study that will report on the changes in a wide range of health and justice outcome measures associated with major policy changes in the state of Queensland, Australia. A key element includes trading hours restrictions for licensed premises to 2 am for the state and 3 am in Safe Night Precincts (SNPs). Other measures introduced include drinks restrictions after midnight, increased patron banning measures for repeat offenders, mandatory ID scanning of patrons in late-night venues, and education campaigns. The primary aim of the study is to evaluate change in the levels of harm due to these policy changes using administrative data (e.g., police, hospital, ambulance, and court data). Other study elements will investigate the impact of the Policy by measuring foot traffic volume in SNPs, using ID scanner data to quantify the volume of people entering venues and measure the effectiveness of banning notices, using patron interviews to quantify the levels of pre-drinking, intoxication and illicit drug use within night-time economy districts, and to explore the impacts of the Policy on business and live music, and costs to the community. The information gathered through this project aims to evaluate the effectiveness of the Policy and to draw on these findings to inform future prevention and enforcement approaches by policy makers, police, and venue staff.

  18. Queensland Alcohol-related violence and Night Time Economy Monitoring project (QUANTEM: a study protocol

    Directory of Open Access Journals (Sweden)

    Peter G. Miller

    2017-10-01

    Full Text Available Abstract Background Alcohol-related harm is a substantial burden on the community in Australia and internationally, particularly harm related to risky drinking practices of young people in the night-time economy. This protocol paper describes a study that will report on the changes in a wide range of health and justice outcome measures associated with major policy changes in the state of Queensland, Australia. A key element includes trading hours restrictions for licensed premises to 2 am for the state and 3 am in Safe Night Precincts (SNPs. Other measures introduced include drinks restrictions after midnight, increased patron banning measures for repeat offenders, mandatory ID scanning of patrons in late-night venues, and education campaigns. Methods The primary aim of the study is to evaluate change in the levels of harm due to these policy changes using administrative data (e.g., police, hospital, ambulance, and court data. Other study elements will investigate the impact of the Policy by measuring foot traffic volume in SNPs, using ID scanner data to quantify the volume of people entering venues and measure the effectiveness of banning notices, using patron interviews to quantify the levels of pre-drinking, intoxication and illicit drug use within night-time economy districts, and to explore the impacts of the Policy on business and live music, and costs to the community. Discussion The information gathered through this project aims to evaluate the effectiveness of the Policy and to draw on these findings to inform future prevention and enforcement approaches by policy makers, police, and venue staff.

  19. Associations among rotating night shift work, sleep and skin cancer in Nurses' Health Study II participants.

    Science.gov (United States)

    Heckman, Carolyn J; Kloss, Jacqueline D; Feskanich, Diane; Culnan, Elizabeth; Schernhammer, Eva S

    2017-03-01

    Night shift work and sleep duration have been associated with breast and other cancers. Results from the few prior studies of night shift work and skin cancer risk have been mixed and not fully accounted for other potentially important health-related variables (eg, sleep characteristics). This study evaluated the relationship between rotating night shift work and skin cancer risk and included additional skin cancer risk factors and sleep-related variables. The current study used data from 74 323 Nurses' Health Study (NHS) II participants. Cox proportional hazards models were used to estimate multivariable-adjusted HRs and 95% CIs for skin cancers across categories of shift work and sleep duration. Over 10 years of follow-up, 4308 basal cell carcinoma (BCC), 334 squamous cell carcinoma (SCC) and 212 melanoma cases were identified. Longer duration of rotating night shifts was associated with a linear decline in risk of BCC (HR=0.93, 95% CI 0.90 to 0.97 per 5-year increase). Shift work was not significantly associated with either melanoma (HR=1.02, 95% CI 0.86 to 1.21) or SCC (HR=0.92, 95% CI 0.80 to 1.06). A short sleep duration (≤6 hours per day) was associated with lower risks of melanoma (HR=0.68, 95% CI 0.46 to 0.98) and BCC (HR=0.93, 95% CI 0.86 to 1.00) compared with the most common report of 7 hours. SCC was not associated with duration of sleep (HR=0.94, 95% CI 0.83 to 1.06). Longer duration of rotating night shift work and shorter sleep duration were associated with lower risk of some skin cancers. Further research is needed to confirm and identify the mechanisms underlying these associations. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/.

  20. Diagnosing night sweats.

    Science.gov (United States)

    Viera, Anthon J; Bond, Michael M; Yates, Scott W

    2003-03-01

    Night sweats are a common outpatient complaint, yet literature on the subject is scarce. Tuberculosis and lymphoma are diseases in which night sweats are a dominant symptom, but these are infrequently found to be the cause of night sweats in modern practice. While these diseases remain important diagnostic considerations in patients with night sweats, other diagnoses to consider include human immunodeficiency virus, gastroesophageal reflux disease, obstructive sleep apnea, hyperthyroidism, hypoglycemia, and several less common diseases. Antihypertensives, antipyretics, other medications, and drugs of abuse such as alcohol and heroin may cause night sweats. Serious causes of night sweats can be excluded with a thorough history, physical examination, and directed laboratory and radiographic studies. If a history and physical do not reveal a possible diagnosis, physicians should consider a purified protein derivative, complete blood count, human immunodeficiency virus test, thyroid-stimulating hormone test, erythrocyte sedimentation rate evaluation, chest radiograph, and possibly chest and abdominal computed tomographic scans and bone marrow biopsy.

  1. Assessing the feasibility of harm reduction services for MSM: the late night breakfast buffet study

    Directory of Open Access Journals (Sweden)

    Kellogg Timothy A

    2006-10-01

    Full Text Available Abstract Background Despite the leveling off in new HIV infections among men who have sex with men (MSM in San Francisco, new evidence suggests that many recent HIV infections are linked with the use of Methamphetamine (MA. Among anonymous HIV testers in San Francisco, HIV incidence among MA users was 6.3% compared to 2.1% among non-MA users. Of particular concern for prevention programs are frequent users and HIV positive men who use MA. These MSM pose a particular challenge to HIV prevention efforts due to the need to reach them during very late night hours. Methods The purpose of the Late Night Breakfast Buffet (LNBB was to determine the feasibility and uptake of harm reduction services by a late night population of MSM. The "buffet" of services included: needle exchange, harm reduction information, oral HIV testing, and urine based sexually transmitted infection (STI testing accompanied by counseling and consent procedures. The study had two components: harm reduction outreach and a behavioral survey. For 4 months during 2004, we provided van-based harm reduction services in three neighborhoods in San Francisco from 1 – 5 a.m. for anyone out late at night. We also administered a behavioral risk and service utilization survey among MSM. Results We exchanged 2000 needles in 233 needle exchange visits, distributed 4500 condoms/lubricants and provided 21 HIV tests and 12 STI tests. Fifty-five MSM enrolled in the study component. The study population of MSM was characterized by low levels of income and education whose ages ranged from 18 – 55. Seventy-eight percent used MA in the last 3 months; almost 25% used MA every day in the same time frame. Of the 65% who ever injected, 97% injected MA and 13% injected it several times a day. MA and alcohol were strong influences in the majority of unprotected sexual encounters among both HIV negative and HIV positive MSM. Conclusion We reached a disenfranchised population of MA-using MSM who are at

  2. Rotating night shift work and risk of type 2 diabetes: two prospective cohort studies in women.

    Directory of Open Access Journals (Sweden)

    An Pan

    2011-12-01

    Full Text Available Rotating night shift work disrupts circadian rhythms and has been associated with obesity, metabolic syndrome, and glucose dysregulation. However, its association with type 2 diabetes remains unclear. Therefore, we aimed to evaluate this association in two cohorts of US women.We followed 69,269 women aged 42-67 in Nurses' Health Study I (NHS I, 1988-2008, and 107,915 women aged 25-42 in NHS II (1989-2007 without diabetes, cardiovascular disease, and cancer at baseline. Participants were asked how long they had worked rotating night shifts (defined as at least three nights/month in addition to days and evenings in that month at baseline. This information was updated every 2-4 years in NHS II. Self-reported type 2 diabetes was confirmed by a validated supplementary questionnaire. We documented 6,165 (NHS I and 3,961 (NHS II incident type 2 diabetes cases during the 18-20 years of follow-up. In the Cox proportional models adjusted for diabetes risk factors, duration of shift work was monotonically associated with an increased risk of type 2 diabetes in both cohorts. Compared with women who reported no shift work, the pooled hazard ratios (95% confidence intervals for participants with 1-2, 3-9, 10-19, and ≥20 years of shift work were 1.05 (1.00-1.11, 1.20 (1.14-1.26, 1.40 (1.30-1.51, and 1.58 (1.43-1.74, p-value for trend <0.001, respectively. Further adjustment for updated body mass index attenuated the association, and the pooled hazard ratios were 1.03 (0.98-1.08, 1.06 (1.01-1.11, 1.10 (1.02-1.18, and 1.24 (1.13-1.37, p-value for trend <0.001.Our results suggest that an extended period of rotating night shift work is associated with a modestly increased risk of type 2 diabetes in women, which appears to be partly mediated through body weight. Proper screening and intervention strategies in rotating night shift workers are needed for prevention of diabetes.

  3. Breast cancer risk and night shift work in a case-control study in a Spanish population.

    Science.gov (United States)

    Papantoniou, Kyriaki; Castaño-Vinyals, Gemma; Espinosa, Ana; Aragonés, Nuria; Pérez-Gómez, Beatriz; Ardanaz, Eva; Altzibar, Jone Miren; Sanchez, Vicente Martin; Gómez-Acebo, Inés; Llorca, Javier; Muñoz, David; Tardón, Adonina; Peiró, Rosana; Marcos-Gragera, Rafael; Pollan, Marina; Kogevinas, Manolis

    2016-09-01

    Epidemiologic and animal data indicate that night shift work might increase the risk for breast cancer. We evaluated the association of night work with different clinical types of breast cancer in a population based case-control study (MCC-Spain study) taking into account chronotype, an individual characteristic that may relate to night shift work adaptation. Lifetime occupational history was assessed by face-to-face interviews and shift work information was available for 1708 breast cancer cases and 1778 population controls from 10 Spanish regions, enrolled from 2008 to 2013. We evaluated three shift work domains, including shift work type (permanent vs rotating), lifetime cumulative duration and frequency. We estimated odds ratios (OR) for night work compared to day work using unconditional logistic regression models adjusting for confounders. Having ever worked permanent or rotating night shift was associated with an increased risk for breast cancer compared to day workers [odds ratio (OR) 1.18; 95 % CI 0.97, 1.43]. Chronotype was differentially associated with breast cancer depending on the duration of night shift work. Risk was higher in women with invasive tumors (OR 1.23; 95 % CI 1.00, 1.51) and for estrogen and progestagen positive tumors among premenopausal women (OR 1.44; 95 % CI 1.05, 1.99). Having ever performed night shift was associated with a small increased risk for breast cancer and especially in subgroups of women with particular hormone related characteristics.

  4. Can you see me? Experiences of nurses working night shift in Australian regional hospitals: a qualitative case study.

    Science.gov (United States)

    Powell, Idona

    2013-10-01

    To report a study that explored the experiences of night-shift nurses, focusing on employee interrelationships and work satisfaction. Night-shift nurses are a critical component in hospital care making it essential to understand the experiences that give meaning to their work and understand how these nurses and the organization can benefit from their contribution to hospital care. A literature review revealed minimal research in this area. Qualitative case study. A qualitative case study using semi-structured interviews and self-completed diaries was conducted in 2010 in regional public hospitals in Australia. Participants were 14 nurses working nights half or more of their shifts in medical or surgical wards. Thematic analysis identified four major areas of concern: work relationships, work environment, work practices and lifestyle impact. Notably, work relationships were most meaningful for nurses on the same shift; night-shift nurses experienced working conditions inferior to their daytime counterparts including a perception of minimal leadership. Despite limited education opportunities, night shift provided opportunity for professional growth for some nurses with a slippage in skills for others; night shift provided flexibility for family and social activities, yet impeded these same activities, primarily due to pervasive fatigue. Night-shift nurses considered their role critical, yet believed that they were poorly regarded. The strong interpersonal relationships developed between night-shift workers need to be capitalized on whilst developing a more effective leadership model, improved work environment, more equitable professional development, and genuine recognition of the critical role of night nurses. © 2013 Blackwell Publishing Ltd.

  5. Shift work schedule and night work load: Effects on body mass index - a four-year longitudinal study.

    Science.gov (United States)

    Buchvold, Hogne Vikanes; Pallesen, Ståle; Waage, Siri; Bjorvatn, Bjørn

    2018-05-01

    Objectives The aim of this study was to investigate changes in body mass index (BMI) between different work schedules and different average number of yearly night shifts over a four-year follow-up period. Methods A prospective study of Norwegian nurses (N=2965) with different work schedules was conducted: day only, two-shift rotation (day and evening shifts), three-shift rotation (day, evening and night shifts), night only, those who changed towards night shifts, and those who changed away from schedules containing night shifts. Paired student's t-tests were used to evaluate within subgroup changes in BMI. Multiple linear regression analysis was used to evaluate between groups effects on BMI when adjusting for BMI at baseline, sex, age, marital status, children living at home, and years since graduation. The same regression model was used to evaluate the effect of average number of yearly night shifts on BMI change. Results We found that night workers [mean difference (MD) 1.30 (95% CI 0.70-1.90)], two shift workers [MD 0.48 (95% CI 0.20-0.75)], three shift workers [MD 0.46 (95% CI 0.30-0.62)], and those who changed work schedule away from [MD 0.57 (95% CI 0.17-0.84)] or towards night work [MD 0.63 (95% CI 0.20-1.05)] all had significant BMI gain (Pnight workers had significantly larger BMI gain compared to day workers [B=0.89 (95% CI 0.06-1.72), Pnight shifts and BMI change using our multiple linear regression model. Conclusions After adjusting for possible confounders, we found that BMI increased significantly more among night workers compared to day workers.

  6. Night Sleep Duration and Risk of Cognitive Impairment in a Chinese Population: A Cross-sectional Study.

    Science.gov (United States)

    Song, Qiao Feng; Liu, Xiao Xue; Hu, Wan Ning; Han, Xiao Chen; Zhou, Wen Hua; Lu, Ai Dong; Wang, Xi Zhu; Wu, Shou Ling

    2017-10-01

    Although sleep is one of the most important health-related behavioral factors, the association between night sleep duration and cognitive impairment has not been fully understood. A cross-sectional study was conducted with a random sample of 2,514 participants (⋝ 40 years of age; 46.6% women) in China to examine the association between night sleep duration and cognitive impairment. Night sleep duration was categorized as ⋜ 5, 6, 7, 8, or ⋝ 9 h per night. Cognitive function was measured using the Mini-Mental State Examination. A multivariate regression analysis was used to analyze the association of night sleep duration with cognitive impairment. A total of 122 participants were diagnosed with cognitive impairment. A U-shaped association between night sleep duration and cognitive impairment was found. The odds ratios (95% confidence intervals) of cognitive impairment (with 7 h of daily sleep being considered as the reference) for individuals reporting ⋜ 5, 6, 8, and ⋝ 9 h were 2.14 (1.20-3.83), 1.13 (0.67-1.89), 1.51 (0.82-2.79), and 5.37 (1.62-17.80), respectively (P ⋜ 0.01). Short or long night sleep duration was an important sleep-related factor independently associated with cognitive impairment and may be a useful marker for increased risk of cognitive impairment.. Copyright © 2017 The Editorial Board of Biomedical and Environmental Sciences. Published by China CDC. All rights reserved.

  7. Associations between night work and BMI, alcohol, smoking, caffeine and exercise--a cross-sectional study.

    Science.gov (United States)

    Buchvold, Hogne Vikanes; Pallesen, Ståle; Øyane, Nicolas M F; Bjorvatn, Bjørn

    2015-11-12

    Shift work is associated with negative health effects. Increased prevalence of several cardiovascular risk factors among shift workers/night workers compared with day workers have been shown resulting in increased risk of cardiovascular events among shift workers and night workers. Previous studies have taken a dichotomous approach to the comparison between day and night workers. The present study uses a continuous approach and provides such a new perspective to the negative effects of night work load as a possible risk factor for undesirable health effects. This cross sectional study (The SUrvey of Shift work, Sleep and Health (SUSSH)) uses data collected from December 2008 to March 2009. The study population consists of Norwegian nurses. The study collected information about demographic and lifestyle factors: Body Mass Index (BMI), smoking habits, alcohol consumption, caffeine consumption and exercise habits. The lifestyle parameters were evaluated using multiple hierarchical regression and binary logistic regression. Number of night shifts worked last year (NNL) was used as operationalization of night work load. Adjustment for possible confounders were made. Obesity was defined as BMI > 30. Alcohol Consumption was evaluated using the short form of the Alcohol Use Disorders Identification Test Consumption (AUDIT-C). Data were analyzed using SPSS version 22. We had data from 2059 nurses. NNL was significantly and positively associated with BMI, both when evaluated against BMI as a continuous parameter (Beta = .055, p < .05), and against obesity (OR = 1.01, 95 % CI = 1.00-1.01). The AUDIT-C score was significantly and positively associated with hours worked per week (OR = 1.03, 95 % CI = 1.01-1.05). We found a positive significant association between night work load and BMI. This suggests that workers with a heavy night work load might need special attention and frequent health checks due to higher risk of undesirable health effects.

  8. Night-shift work and hematological cancers: a population based case-control study in three Nordic countries.

    Science.gov (United States)

    Talibov, Madar; Pukkala, Eero; Martinsen, Jan Ivar; Tryggvadottir, Laufey; Weiderpass, Elisabete; Hansen, Johnni

    2018-05-01

    Objective The aim of this case-control study was to assess the effect of night-shift work on the risk of hematological cancers. Methods The study included 39 371 leukemia, 56 713 non-Hodgkin lymphoma, 9322 Hodgkin lymphoma, and 26 188 multiple myeloma cases diagnosed between 1961 and 2005 in Finland, Sweden, and Iceland. Five controls for each case were selected from the Nordic Occupational Cancer Study (NOCCA) cohort, matched by year of birth, sex and country. Night-shift exposure was assessed by using the NOCCA job-exposure matrix (JEM). Odds ratios (OR) and 95% confidence intervals (95% CI) were calculated from conditional logistic regression models. Results Overall, night work was not associated with a risk of hematological cancers. We observed a small but non-significantly increased risk for leukemia (OR 1.07, 95% CI 0.99-1.16), especially for acute myeloid leukemia (OR 1.15, 95% CI 0.97-1.36) among workers exposed to a high level of cumulative night work exposure. Night work exposure was not associated with lymphatic cancers and multiple myeloma. Conclusion This study did not support associations between night-shift work and hematological cancers.

  9. Dissociative symptoms and sleep parameters--an all-night polysomnography study in patients with insomnia.

    Science.gov (United States)

    Van Der Kloet, Dalena; Giesbrecht, Timo; Franck, Erik; Van Gastel, Ann; De Volder, Ilse; Van Den Eede, Filip; Verschuere, Bruno; Merckelbach, Harald

    2013-08-01

    Dissociative disorders encompass a range of symptoms varying from severe absent-mindedness and memory problems to confusion about one's own identity. Recent studies suggest that these symptoms may be the by-products of a labile sleep-wake cycle. In the current study, we explored this issue in patients suffering from insomnia (N=46). We investigated whether these patients have raised levels of dissociative symptoms and whether these are related to objective sleep parameters. Patients stayed for at least one night in a specialized sleep clinic, while sleep EEG data were obtained. In addition, they completed self-report measures on dissociative symptoms, psychological problems, and sleep characteristics. Dissociative symptom levels were elevated in patients suffering from insomnia, and were correlated with unusual sleep experiences and poor sleep quality. Longer REM sleep periods and less time spent awake during the night were predictive of dissociation. This is the first study to show that insomnia patients have raised dissociative symptom levels and that their dissociative symptoms are related to objective EEG parameters. These findings are important because they may inspire sleep-related treatment methods for dissociative disorders. Copyright © 2013 Elsevier Inc. All rights reserved.

  10. When are night shifts effective for nursing student clinical learning? Findings from a mixed-method study design.

    Science.gov (United States)

    Palese, Alvisa; Basso, Felix; Del Negro, Elena; Achil, Illarj; Ferraresi, Annamaria; Morandini, Marzia; Moreale, Renzo; Mansutti, Irene

    2017-05-01

    Some nursing programmes offer night shifts for students while others do not, mainly due to the lack of evidence regarding their effectiveness on clinical learning. The principal aims of the study were to describe nursing students' perceptions and to explore conditions influencing effectiveness on learning processes during night shifts. An explanatory mixed-method study design composed of a cross-sectional study (primary method, first phase) followed by a descriptive phenomenological study design (secondary method, second phase) in 2015. Two bachelor of nursing degree programmes located in Northern Italy, three years in length and requiring night shifts for students starting in the second semester of the 1st year, were involved. First phase: all nursing students ending their last clinical placement of the academic year attended were eligible; 352 out the 370 participated. Second phase: a purposeful sample of nine students among those included in the first phase and who attended the highest amount of night shifts were interviewed. First phase: a questionnaire composed of closed and open-ended questions was adopted; data was analyzed through descriptive statistical methods. Second phase: an open-ended face-to-face audio-recorded interview was adopted and data was analyzed through content analysis. Findings from the quantitative phase, showed that students who attended night shifts reported satisfaction (44.7%) less frequently than those who attended only day shifts (55.9%). They also reported boredom (23.5%) significantly more often compared to day shift students (p=0001). Understanding of the nursing role and learning competence was significantly inferior among night shift students as compared to day shift students, while the perception of wasting time was significantly higher among night shift students compared to their counterparts. Night shift students performed nursing rounds (288; 98.2%), non-nursing tasks (247; 84.3%) and/or less often managed clinical problems

  11. Future lighting and the appearance of cities at night: A case study

    Directory of Open Access Journals (Sweden)

    Simon Rankel

    2014-06-01

    Full Text Available Future lighting solutions based on solid state lighting will transform the appearance of cities at night. They can be positioned and used in an urban environment in numerous ways. This article studies whether their future use in general outdoor lighting will positively affect people’s acceptance of urban space illuminated in this way. Two different lighting concepts were formed based on the innovative use of solid state lighting solutions. The first concept is based on plane lighting, and the second is based on a detailed depiction of architectural and urban elements. Lighting proposals were designed for five different city locations. They consider not only functional needs, but also urban planning and the architectural aspects of illumination. I present my study of the underlying core effects on the respondents through their assessment of the affective quality of graphic representations. My findings indicate that the respondents strongly agree with the assessment of the “pleasantness” and “arousal” variables of most proposals. However, the statistics show characteristic differences between the answers of both variables for both concepts. Direct comparison of the two concepts shows that the respondents’ attitudes towards a certain lighting concept also depend on their location in the city. This article emphasises the importance of the appearance of a city at night in developing future lighting strategies based on solid state light sources.

  12. A three-month longitudinal study of changes in day/night serum total antioxidant capacity in paranoid schizophrenia.

    Science.gov (United States)

    Morera-Fumero, Armando L; Díaz-Mesa, Estefanía; Abreu-Gonzalez, Pedro; Fernandez-Lopez, Lourdes; Guillen-Pino, Fernando

    2017-01-01

    Free radicals and an oxidant/antioxidant imbalance have been involved in the schizophrenia pathophysiology. The total antioxidant capacity (TAC) is a measure of the antioxidant capacity of a system. Day/night changes are a biological characteristic of hormones such as melatonin or cortisol. There is little information about TAC day/night changes in schizophrenia patients. The aim of this research is to study if there are day/night changes in serum TAC levels of schizophrenia patients. Thirty-two DSM-IV schizophrenia paranoid patients were studied. Blood was sampled at 12:00 and 00:00 h at admission, discharge and three months after hospital discharge (TMAHD). TAC results are expressed as mmol of Trolox/L. Patients did not have day/night TAC differences at admission (12:00: 0.67±0.12 vs. 00:00: 0.61±0.14, p>0.14) or discharge (12:00: 0.65±0.15 vs. 00:00: 0.65±0.12, p>0.99). At TMHD, patients had significantly higher TAC levels at midday than midnight (12:00: 0.83±0.10 vs. 00:00: 0.74±0.12, pday/night serum TAC changes when clinically relapsed and the normalization of day/night serum TAC changes at TMHD can be considered as a biological marker of schizophrenia evolution.

  13. [Comparative study of sleep patterns in nurses working day and night shifts].

    Science.gov (United States)

    De Martino, Milva Maria Figueiredo

    2002-08-01

    To compare sleep patterns in nurses working day and night shifts in a hospital in Campinas (SP), Brazil. Fifty-nine nurses between 23 and 59 years of age participated in the study. For day shift workers, the pattern of nocturnal sleep was examined; for night shift workers, nocturnal and diurnal sleep patterns were examined. During 1 week, participants filled out a sleep diary right after waking up. The following items were assessed: time going to bed, falling asleep, and waking up; sleep latency; duration in hours of nocturnal and diurnal sleep; naps; quality of sleep; mode of waking up; and comparison between the sleep recorded in the diary with the usual sleep. Personal and professional information was also collected. Day shift workers went to bed at 23h36min, and night workers at 23h52min (P > 0.05). The nurses working a day schedule woke up earlier (7h3min) than those working a night schedule when they slept at night (8h30min) (P hora de ir deitar, de dormir, e de acordar; latência do sono; horas de sono noturno e diurno; cochilos; qualidade do sono; modo de acordar; e comparação do sono registrado no diário com o sono habitual. Também foram coletadas informações pessoais e profissionais. Resultados: O grupo diurno ia dormir às 23h36min e o grupo noturno, às 23h52min (P

  14. Night shift work, chronotype and prostate cancer risk in the MCC-Spain case-control study.

    Science.gov (United States)

    Papantoniou, Kyriaki; Castaño-Vinyals, Gemma; Espinosa, Ana; Aragonés, Nuria; Pérez-Gómez, Beatriz; Burgos, Javier; Gómez-Acebo, Inés; Llorca, Javier; Peiró, Rosana; Jimenez-Moleón, Jose Juan; Arredondo, Francisco; Tardón, Adonina; Pollan, Marina; Kogevinas, Manolis

    2015-09-01

    Night shift work has been classified as a probable human carcinogen based on experimental studies and limited human evidence on breast cancer. Evidence on other common cancers, such as prostate cancer, is scarce. Chronotype is an individual characteristic that may relate to night work adaptation. We evaluated night shift work with relation to prostate cancer, taking into account chronotype and disease severity in a population based case-control study in Spain. We included 1,095 prostate cancer cases and 1,388 randomly selected population controls. We collected detailed information on shift schedules (permanent vs. rotating, time schedules, duration, frequency), using lifetime occupational history. Sociodemographic and lifestyle factors were assessed by face-to-face interviews and chronotype through a validated questionnaire. We used unconditional logistic regression analysis adjusting for potential confounders. Subjects who had worked at least for one year in night shift work had a slightly higher prostate cancer risk [Odds Ratio (OR) 1.14; 95%CI 0.94, 1.37] compared with never night workers; this risk increased with longer duration of exposure (≥ 28 years: OR 1.37; 95%CI 1.05, 1.81; p-trend = 0.047). Risks were more pronounced for high risk tumors [D'Amico classification, Relative Risk Ratio (RRR) 1.40; 95%CI 1.05, 1.86], particularly among subjects with longer duration of exposure (≥28 years: RRR 1.63; 95%CI 1.08, 2.45; p-trend = 0.027). Overall risk was higher among subjects with an evening chronotype, but also increased in morning chronotypes after long-term night work. In this large population based study, we found an association between night shift work and prostate cancer particularly for tumors with worse prognosis. © 2014 UICC.

  15. Napping on the Night Shift: A Study of Sleep, Performance, and Learning in Physicians-in-Training.

    Science.gov (United States)

    McDonald, Jennifer; Potyk, Darryl; Fischer, David; Parmenter, Brett; Lillis, Teresa; Tompkins, Lindsey; Bowen, Angela; Grant, Devon; Lamp, Amanda; Belenky, Gregory

    2013-12-01

    Physicians in training experience fatigue from sleep loss, high workload, and working at an adverse phase of the circadian rhythm, which collectively degrades task performance and the ability to learn and remember. To minimize fatigue and sustain performance, learning, and memory, humans generally need 7 to 8 hours of sleep in every 24-hour period. In a naturalistic, within-subjects design, we studied 17 first- and second-year internal medicine residents working in a tertiary care medical center, rotating between day shift and night float every 4 weeks. We studied each resident for 2 weeks while he/she worked the day shift and for 2 weeks while he/she worked the night float, objectively measuring sleep by wrist actigraphy, vigilance by the Psychomotor Vigilance Task test, and visual-spatial and verbal learning and memory by the Brief Visuospatial Memory Test-Revised and the Rey Auditory-Verbal Learning Test. Residents, whether working day shift or night float, slept approximately 7 hours in every 24-hour period. Residents, when working day shift, consolidated their sleep into 1 main sleep period at night. Residents working night float split their sleep, supplementing their truncated daytime sleep with nighttime on-duty naps. There was no difference in vigilance or learning and memory, whether residents worked day shift or night float. Off-duty sleep supplemented with naps while on duty appears to be an effective strategy for sustaining vigilance, learning, and memory when working night float.

  16. Patients' Lived Experiences of Nocturia: A Qualitative Study of the Evening, the Night, and the Next Day.

    Science.gov (United States)

    Trigg, Andrew; Andersson, Fredrik L; Aldhouse, Natalie V J; Bliwise, Donald L; Kitchen, Helen

    2017-12-01

    Nocturia, waking to urinate two or more times during the night, is a chronic condition associated with significant patient burden due to sleep disruption. This study aimed to explore the lived experiences of patients with nocturia in terms of the disruption to their lives during the night and day. Adult patients in the US diagnosed with nocturia were recruited for face-to-face qualitative interviews. Thematic analysis of patients' narratives, taking a phenomenological interpretative approach, summarised their experiences throughout the night and day, including any apparent contrasts between patients. Twenty patients (10 male, 10 female) aged between 39 and 80 years, averaging three night-time voids, were interviewed. Analysis revealed that nocturia has a substantial impact on sleep quality and quantity, with the frequency of night-time voids a key driver of this. In addition to night-time phenomena, patients faced various difficulties the next day, including day-time tiredness, lack of energy and concerns related to emotional wellbeing, social functioning and cognitive functioning. All of these limited patients' capacity to work, perform daily activities or fulfil role responsibilities. Patients' lifestyles influenced experience, where younger patients in employment more readily emphasised the day-time physical and psychosocial burdens. Patients employed coping behaviours in an attempt to lessen the severity of nocturia and its impact, which were both physician-led and self-taught. While the symptom of nocturia only occurs during the night, the impact is longer lasting, affecting functioning and wellbeing throughout the following day. Patients' circumstances can affect the extent of their burden; recognising this can improve effective delivery of patient-centred care.

  17. A prospective cohort study of the morbidity associated with operative vaginal deliveries performed by day and at night.

    Science.gov (United States)

    Butler, Katherine; Ramphul, Meenakshi; Dunney, Clare; Farren, Maria; McSweeney, Aoife; McNamara, Karen; Murphy, Deirdre J

    2014-10-29

    To evaluate maternal and neonatal outcomes associated with operative vaginal deliveries (OVDs) performed by day and at night. Prospective cohort study. Urban maternity unit in Ireland with off-site consultant staff at night. All nulliparous women requiring an OVD with a term singleton fetus in a cephalic presentation from February to November 2013. Delivery outcomes were compared for women who delivered by day (08:00-19:59) or at night (20:00-07:59). The main outcomes included postpartum haemorrhage (PPH), anal sphincter tear and neonatal unit admission. Procedural factors included operator grade, sequential use of instruments and caesarean section. Of the 597 women who required an OVD, 296 (50%) delivered at night. Choice of instrument, place of delivery, sequential use of instruments and caesarean section did not differ significantly in relation to time of birth. Mid-grade operators performed less OVDs by day than at night, OR 0.60 (95% CI 0.43 to 0.83), and a consultant supervisor was more frequently present by day, OR 2.26 (95% CI 1.05 to 4.83). Shoulder dystocia occurred more commonly by day, OR 2.57 (95% CI 1.05 to 6.28). The incidence of PPH, anal sphincter tears, neonatal unit admission, fetal acidosis and neonatal trauma was similar by day and at night. The mean decision to delivery intervals were 12.0 and 12.6 min, respectively. There was no evidence of an association between time of OVD and adverse perinatal outcomes despite off-site consultant obstetric support at night. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  18. Morning and night symptoms in primary care COPD patients : a cross-sectional and longitudinal study. An UNLOCK study from the IPCRG

    NARCIS (Netherlands)

    Tsiligianni, Ioanna; Metting, Esther; van der Molen, Thys; Chavannes, Niels; Kocks, Janwillem

    2016-01-01

    COPD symptoms show a diurnal variability. However, morning and night variability has generally not been taken into consideration in disease management plans. The aims of this study were to cross-sectionally assess morning and night symptom prevalence and correlation with health status and disease

  19. The effects of consecutive night shifts and shift length on cognitive performance and sleepiness: a field study.

    Science.gov (United States)

    Haidarimoghadam, Rashid; Kazemi, Reza; Motamedzadeh, Majid; Golmohamadi, Rostam; Soltanian, Alireza; Zoghipaydar, Mohamad Reza

    2017-06-01

    The aim of this study was to evaluate the effects of consecutive night shifts (CNS) and shift length on cognitive performance and sleepiness. This study evaluated the sleepiness and performance of 30 control room operators (CROs) working in 7 nights, 7 days, 7 days off (7N7D7O) and 30 CROs working in 4 nights, 7 days, 3 nights, 7 days off (4N7D3N7O) shift patterns in a petrochemical complex on the last night shift before swinging into the day shift. To assess cognitive performance, the n-back test, continuous performance test and simple reaction time test were employed. To assess sleepiness, the Karolinska sleepiness scale was used. Both schedules indicated that the correct responses and response times of working memory were reduced (p = 0.001), while intentional errors and sleepiness increased during the shift work (p = 0.001). CNS had a significant impact on reaction time and commission errors (p = 0.001). The main duty of CROs at a petrochemical plant is checking hazardous processes which require appropriate alertness and cognitive performance. As a result, planning for appropriate working hours and suitable number of CNS in a rotating shift system is a contribution to improving CRO performance and enhancing safety.

  20. Interleukin-6 Level among Shift and Night Workers in Japan: Cross-Sectional Analysis of the J-HOPE Study.

    Science.gov (United States)

    Amano, Hoichi; Fukuda, Yoshiharu; Yokoo, Takashi; Yamaoka, Kazue

    2018-03-27

    Shift workers have a high risk of cardiovascular disease (CVD). Systemic inflammation measured has been associated with the risk of CVD onset, in addition to classical risk factors. However, the association between work schedule and inflammatory cytokine levels remains unclear. The purpose of this study was to examine the association between work schedule and interleukin-6 (IL-6)/high-sensitivity C-reactive protein (hs-CRP) levels among Japanese workers. The present cross-sectional study was a part of the Japanese Study of Health, Occupation and Psychosocial Factors Related Equity (J-HOPE). A total of 5259 persons who measured inflammatory cytokine were analyzed in this study. One-way analysis of variance was used to test log-transformed IL-6/hs-CRP differences by work schedule. Multiple regression analysis was used to examine the difference adjusted for other possible CVD risk factors. There were 3660 participants who had a regular work schedule; the remaining schedules were shift work without night work for 181 participants, shift work with night work for 1276 participants, and only night work for 142 participants. The unadjusted model showed that only night workers were significantly related to high levels of IL-6 compared with regular workers. Even in the multiple regression analysis, the higher level of IL-6 among only night workers remained significant (β=0.058, P=0.01). On the contrary, hs-CRP was not. The present study revealed that only night shift work is significantly associated with high levels of IL-6 in Japanese workers. These observations help us understand the mechanism for the association between work schedule and CVD onset.

  1. Parameter study on performance of building cooling by night-time ventilation

    DEFF Research Database (Denmark)

    Artmann, Nikolai; Manz, H.; Heiselberg, Per

    2008-01-01

    of different parameters such as building construction, heat gains, air change rates, heat transfer coefficients and climatic conditions including annual variations on the number of overheating degree hours (operative room temperature >26 °C) was evaluated. Climatic conditions and air flow rate during night......Especially for commercial buildings in moderate climates, night-time ventilation seems to be a simple and energy-efficient approach to improve thermal comfort in summer. However, due to uncertainties in the prediction of thermal comfort in buildings with night-time ventilation, architects...... and engineers are still hesitant to apply this technique. In order to reduce the uncertainties, the most important parameters affecting night ventilation performance need to be identified. A typical office room was therefore modelled using a building energy simulation programme (HELIOS), and the effect...

  2. Rotating Night-Shift Work and the Risk of Breast Cancer in the Nurses' Health Studies.

    Science.gov (United States)

    Wegrzyn, Lani R; Tamimi, Rulla M; Rosner, Bernard A; Brown, Susan B; Stevens, Richard G; Eliassen, A Heather; Laden, Francine; Willett, Walter C; Hankinson, Susan E; Schernhammer, Eva S

    2017-09-01

    In 2007, the International Agency for Research on Cancer declared shift work that involved circadian disruption to be a "probable" carcinogen (group 2A), noting that human evidence was limited. Using data from 2 prospective cohort studies, the Nurses' Health Study (1988-2012; n = 78,516) and Nurses' Health Study II (1989-2013; n = 114,559), we examined associations between rotating night-shift work and breast cancer risk. In the 2 cohorts, there were a total of 9,541 incident invasive breast malignancies and 24 years of follow-up. In the Nurses' Health Study, women with 30 years or more of shift work did not have a higher risk of breast cancer (hazard ratio (HR) = 0.95, 95% confidence interval (95% CI): 0.77, 1.17; P for trend = 0.63) compared with those who never did shift work, although follow-up occurred primarily after retirement from shift work. Among participants in the Nurses' Health Study II, who were younger than participants in the other cohort, the risk of breast cancer was significantly higher in women with 20 years or more of shift work at baseline, reflecting young-adult exposure (HR = 2.15, 95% CI: 1.23, 3.73; P for trend = 0.23), and was marginally significantly higher for women with 20 years or more of cumulative shift work when we used updated exposure information (HR = 1.40, 95% CI: 1.00, 1.97; P for trend = 0.74). In conclusion, long-term rotating night-shift work was associated with a higher risk of breast cancer, particularly among women who performed shift work during young adulthood. Further studies should explore the role of shift work timing on breast cancer risk. © The Author(s) 2017. Published by Oxford University Press on behalf of the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

  3. History of the Night

    CERN Multimedia

    CERN. Geneva

    2016-01-01

    The definition of the night, as the period between sunset and sunrise, is consistent and unalterable, regardless of culture and time. However the perception of the night and its economic, social, and cultural roles are subject to change. Which parameters determine these changes? What can we learn by studying them about the specific character of a culture? Why do people experience the night in different ways in different historical periods and how did this affect their lives? How do references to nocturnal activities in historical sources (works of art, narratives) reveal what the artists/authors wish to communicate to their audiences? Can the night be a meaningful subject of historical and archaeological enquiry? A study of the source material in the Greek world (ca. 400 BC-ca. AD 400) shows a continuous effort to colonize the night with activities of the day, to make the night safer, more productive, more rational, more efficient. The main motors for this change were social developments and religion, no...

  4. A three-month longitudinal study of changes in day/night serum total antioxidant capacity in paranoid schizophrenia.

    Directory of Open Access Journals (Sweden)

    Armando L Morera-Fumero

    Full Text Available Free radicals and an oxidant/antioxidant imbalance have been involved in the schizophrenia pathophysiology. The total antioxidant capacity (TAC is a measure of the antioxidant capacity of a system. Day/night changes are a biological characteristic of hormones such as melatonin or cortisol. There is little information about TAC day/night changes in schizophrenia patients. The aim of this research is to study if there are day/night changes in serum TAC levels of schizophrenia patients. Thirty-two DSM-IV schizophrenia paranoid patients were studied. Blood was sampled at 12:00 and 00:00 h at admission, discharge and three months after hospital discharge (TMAHD. TAC results are expressed as mmol of Trolox/L. Patients did not have day/night TAC differences at admission (12:00: 0.67±0.12 vs. 00:00: 0.61±0.14, p>0.14 or discharge (12:00: 0.65±0.15 vs. 00:00: 0.65±0.12, p>0.99. At TMHD, patients had significantly higher TAC levels at midday than midnight (12:00: 0.83±0.10 vs. 00:00: 0.74±0.12, p<0.006 as it has been reported in healthy subjects. There were no significant TAC differences at 12.00 and 00:00 between admission and discharge. At TMAHD, patients had significantly higher TAC levels than at admission and discharge, both at 12:00 and 00:00 h. In conclusion, the absence of day/night serum TAC changes when clinically relapsed and the normalization of day/night serum TAC changes at TMHD can be considered as a biological marker of schizophrenia evolution.

  5. Night shift work and breast cancer: a pooled analysis of population-based case-control studies with complete work history.

    Science.gov (United States)

    Cordina-Duverger, Emilie; Menegaux, Florence; Popa, Alexandru; Rabstein, Sylvia; Harth, Volker; Pesch, Beate; Brüning, Thomas; Fritschi, Lin; Glass, Deborah C; Heyworth, Jane S; Erren, Thomas C; Castaño-Vinyals, Gemma; Papantoniou, Kyriaki; Espinosa, Ana; Kogevinas, Manolis; Grundy, Anne; Spinelli, John J; Aronson, Kristan J; Guénel, Pascal

    2018-04-01

    Night shift work has been suspected to increase breast cancer risk but epidemiological studies have been inconsistent due to heterogeneous assessment of exposure to night work. To overcome this limitation, we pooled data of five population-based case-control studies from Australia, Canada, France, Germany, and Spain into a single harmonized dataset using a common definition of night work including 6093 breast cancer cases and 6933 population controls. The odds ratio for breast cancer in women who ever worked at night for at least 3 h between midnight and 5 a.m. as compared to never night workers was 1.12 (95% CI 1.00-1.25). Among pre-menopausal women, this odds ratio was 1.26 [1.06-1.51], increasing to 1.36 [1.07-1.74] for night shifts ≥ 10 h, 1.80 [1.20-2.71] for work ≥ 3 nights/week, and 2.55 [1.03-6.30] for both duration of night work ≥ 10 years and exposure intensity ≥ 3 nights/week. Breast cancer risk in pre-menopausal women was higher in current or recent night workers (OR = 1.41 [1.06-1.88]) than in those who had stopped night work more than 2 years ago. Breast cancer in post-menopausal women was not associated with night work whatever the exposure metric. The increase in risk was restricted to ER+ tumors, particularly those who were both ER+ and HER2+ . These results support the hypothesis that night shift work increases the risk of breast cancer in pre-menopausal women, particularly those with high intensity and long duration of exposure. Risk difference between pre- and post-menopausal women deserves further scrutiny.

  6. Underage drinking on saturday nights, sociodemographic and environmental risk factors: a cross-sectional study

    Directory of Open Access Journals (Sweden)

    Galasso Laura

    2011-07-01

    Full Text Available Abstract Background Excessive alcohol consumption in underage people is a rising phenomenon. A major proportion of the disease burden and deaths of young people in developed nations is attributable to alcohol abuse. The aim of this study was to investigate social, demographic and environmental factors that may raise the risk of Saturday night drinking and binge drinking among Italian school students. Methods The study was conducted on a sample of 845 Italian underage school students, by means of an anonymous, self-test questionnaire. Multivariate logistic regression was applied to identify independent risk factors for alcohol drinking and binge drinking. Ordered logistic regression was used to identify independent risk factors for harmful drinking patterns. Results The independent variables that confer a higher risk of drinking in underage students are older age classes, male sex, returning home after midnight, belonging to a group with little respect for the rules, or to a group where young people are not seen as leaders. The higher the perception of alcohol consumption by the group, the higher the risk. Spending time in bars or discos coincides with a two-fold or four-fold increase, respectively, in the risk of alcohol consumption. Conclusion Our findings show that certain environmental and social risk factors are associated with underage drinking. The most important role for preventing young people's exposure to these factors lies with the family, because only parents can exert the necessary control and provide a barrier against potentially harmful situations.

  7. Chronotype and response to training during the polar night: a pilot study.

    Science.gov (United States)

    Vitale, Jacopo Antonino; Bjoerkesett, Eva; Campana, Andrea; Panizza, Giacomo; Weydahl, Andi

    2017-01-01

    An individual's chronotype influences his or her physiological rhythms. Some studies have looked at the effect of time of day on the responses to exercise, but studies on the effect of long-term training are lacking. To report the effects of an 8-week training period during the polar night in non-athletes of different chronotypes living at 70°N. In all, 10 morning (M), 10 neither (N) and 10 evening (E) types were recruited, and their aerobic capacity (VO 2max ), strength, flexibility and balance before and after the training period were tested. 3 E-types, 5 N-types and 6 M-types completed the protocol. An increase in VO 2max and strength was observed for the whole group. The best negative correlation (r=-0.5287) was found between the Morningness-Eveningness Questionnaire (MEQ) score and the increase in VO2max, and the best positive correlation (r=0.4395) was found between MEQ and the increase in strength. Changes in balance and flexibility did not show any clear trends. In an environment with no outdoor daylight, it seems that the response to 8 weeks of aerobic training is larger in the E- than in the M-types, although the M-types showed a larger improvement in strength.

  8. A European study on alcohol and drug use among young drivers: the TEND by Night study design and methodology

    Directory of Open Access Journals (Sweden)

    Siliquini Roberta

    2010-04-01

    Full Text Available Abstract Background Young individuals are the age group with the highest risk of car accidents. One of main explanations relies on the use of psychoactive substances (alcohol, illegal and medicinal drugs, which are known to be major risk factors of road accidents, and whose consumption is almost universally more common among younger drivers. Although the correlation between psychoactive substances use and decrease in driving performance has been established in controlled experimental or laboratory settings, few studies were conducted in naturalistic circumstances. The TEND by Night project has been designed to evaluate the relationship between driving performance and psychoactive substances assumption in young drivers enrolled at typical places of consumption. Methods/Design The TEND by Night project, endorsed by the European Commission, is a multidisciplinary, multi-centric, cross-sectional study conducted in six European countries (Italy, Belgium/Netherlands, Bulgaria, Spain, Poland and Latvia. The study population consists of 5000 young drivers aged 16-34 years, attending recreational sites during weekend nights. The intervention is based on the portal survey technique and includes several steps at the entrance and exit of selected sites, including the administration of semi-structured questionnaires, breath alcohol test, several drug assumption test, and measurement of the reaction time using a driving simulator. The main outcome is the difference in reaction time between the entrance and exit of the recreation site, and its correlation with psychoactive substances use. As a secondary outcome it will be explored the relationship between reaction time difference and the amount of consumption of each substance. All analyses will be multivariate. Discussion The project methodology should provide some relevant advantages over traditional survey systems. The main strengths of the study include the large and multicentric sample, the objective

  9. Night shift work and chronic lymphocytic leukemia in the MCC-Spain case-control study.

    Science.gov (United States)

    Costas, Laura; Benavente, Yolanda; Olmedo-Requena, Rocío; Casabonne, Delphine; Robles, Claudia; Gonzalez-Barca, Eva-Maria; de la Banda, Esmeralda; Alonso, Esther; Aymerich, Marta; Tardón, Adonina; Marcos-Gragera, Rafael; Gimeno-Vázquez, Eva; Gómez-Acebo, Inés; Papantoniou, Kyriaki; Castaño-Vinyals, Gemma; Aragonés, Nuria; Pollán, Marina; Kogevinas, Manolis; de Sanjosé, Silvia

    2016-11-01

    Chronic lymphocytic leukemia (CLL) has few known modifiable risk factors. Recently, circadian disruption has been proposed as a potential contributor to lymphoid neoplasms' etiology. Serum melatonin levels have been found to be significantly lower in CLL subjects compared with healthy controls, and also, CLL prognosis has been related to alterations in the circadian molecular signaling. We performed the first investigation of an association between night shift work and CLL in 321 incident CLL cases and 1728 population-based controls in five areas of Spain. Participants were interviewed face-to-face by trained interviewers to collect information on sociodemographic factors, familial, medical and occupational history, including work shifts and other lifestyle factors. We used logistic regression models adjusted for potential confounders to estimate odds ratios (OR) and 95% confidence intervals (CI). Seventy-nine cases (25%) and 339 controls (20%) had performed night work. Overall, working in night shifts was not associated with CLL (OR = 1.06; 95% CI = 0.78-1.45, compared with day work). However, long-term night shift (>20 years) was positively associated with CLL (OR(tertile 3 vs . day-work)  = 1.77; 95% = 1.14-2.74), although no linear trend was observed (P trend = 0.18). This association was observed among those with rotating (OR(tertile 3 vs . day-work)  = 2.29; 95% CI = 1.33-3.92; P trend = 0.07), but not permanent night shifts (OR(tertile 3 vs . day-work) = 1.16; 95% CI = 0.60-2.25; P trend = 0.86). The association between CLL and long-term rotating night shift warrants further investigation. © 2016 UICC.

  10. Instrumentation enabling study of plant physiological response to elevated night temperature

    Directory of Open Access Journals (Sweden)

    Tarpley Lee

    2009-06-01

    Full Text Available Abstract Background Global climate warming can affect functioning of crops and plants in the natural environment. In order to study the effects of global warming, a method for applying a controlled heating treatment to plant canopies in the open field or in the greenhouse is needed that can accept either square wave application of elevated temperature or a complex prescribed diurnal or seasonal temperature regime. The current options are limited in their accuracy, precision, reliability, mobility or cost and scalability. Results The described system uses overhead infrared heaters that are relatively inexpensive and are accurate and precise in rapidly controlling the temperature. Remote computer-based data acquisition and control via the internet provides the ability to use complex temperature regimes and real-time monitoring. Due to its easy mobility, the heating system can randomly be allotted in the open field or in the greenhouse within the experimental setup. The apparatus has been successfully applied to study the response of rice to high night temperatures. Air temperatures were maintained within the set points ± 0.5°C. The incorporation of the combination of air-situated thermocouples, autotuned proportional integrative derivative temperature controllers and phase angled fired silicon controlled rectifier power controllers provides very fast proportional heating action (i.e. 9 ms time base, which avoids prolonged or intense heating of the plant material. Conclusion The described infrared heating system meets the utilitarian requirements of a heating system for plant physiology studies in that the elevated temperature can be accurately, precisely, and reliably controlled with minimal perturbation of other environmental factors.

  11. Binge Eating Disorder and Night Eating Syndrome: A Comparative Study of Disordered Eating

    Science.gov (United States)

    Allison, Kelly C.; Grilo, Carlos M.; Masheb, Robin M.; Stunkard, Albert J.

    2005-01-01

    The authors compared eating patterns, disordered eating, features of eating disorders, and depressive symptoms in persons with binge eating disorder (BED; n = 177), with night eating syndrome (NES; n = 68), and in an overweight comparison group without BED or NES (comparison; n = 45). Participants completed semistructured interviews and several…

  12. Factors associated with night-time calf muscle cramps: a case-control study.

    Science.gov (United States)

    Hawke, Fiona; Chuter, Vivienne; Burns, Joshua

    2013-03-01

    Although highly prevalent and painful, night-time calf muscle cramping is poorly understood, and no treatment has shown consistent efficacy or safety. One hundred sixty adults were recruited from New South Wales, Australia, including 80 who had night-time calf cramping at least once per week and 80 age- and gender-matched adults who did not. Participants were assessed using reliable tests of lower limb strength, flexibility, morphometrics, circulation, and sensation, and were questioned about health and lifestyle factors, diet, medications, exercise, symptomatology, sleeping habits, and footwear. Conditional logistic regression identified 3 factors independently associated with night-time calf muscle cramps: muscle twitching (OR 4.6, 95% CI 1.6-15.5, P = 0.01); lower limb tingling (OR 4.1, 95% CI 1.6-10.3, P = 0.003); and foot dorsiflexion weakness (OR 1.02, 95% CI 1.01-1.03, P = 0.002), which represented other measures of lower limb weakness in the model. Night-time calf muscle cramps were associated with markers of neurological dysfunction and potential musculoskeletal therapeutic targets. Copyright © 2012 Wiley Periodicals, Inc., a Wiley company.

  13. Driving home from the night shift: a bright light intervention study.

    Science.gov (United States)

    Weisgerber, Denise M; Nikol, Maria; Mistlberger, Ralph E

    2017-02-01

    Sleep deprivation (SD) impairs vigilance and increases the risk of driving accidents during the commute home after night work. Bright light (BL) can enhance alertness and cognitive performance. We examined the effects of BL (5600 lux) versus dim light (DL, 35 lux) at the end of a night awake on driving performance. Subjects (N = 19, 22.8 ± 4 ya) completed three conditions, counterbalanced for order at >1 week intervals. The two overnight SD conditions began in the lab at usual bedtime. After six hours in DL, subjects were exposed to 45 min BL or continued DL, and then completed a 44 min driving test (two lap circuit) in a high fidelity simulator. In the rested condition, subjects slept at home until habitual wakeup time, were transported to the lab and ∼45 min after wakeup, received BL and then the driving test. Oral temperature decreased while reaction time and sleepiness increased across both SD nights. BL suppressed salivary melatonin but had little or no effect on sleepiness or reaction time. SD markedly increased incidents and accidents. Five subjects (26%) sustained a terminal accident (eg, car flip) in the SD-DL condition, but none did so in the SD-BL or rested-BL conditions. Compared to SD-DL, SD-BL was associated with fewer incidents and accidents overall, and with better performance on the second lap of the circuit on several performance measures. BL at the end of a night shift may have potential as a countermeasure to improve driving following night work. Copyright © 2016 Elsevier B.V. All rights reserved.

  14. A Midsummer Night's Science

    CERN Multimedia

    2001-01-01

    Last year, the first Science Night attracted nearly 1500 people. Dipping into history for the space of one night? This is the idea of Geneva's Museum of the History of Science, which is organizing its second Science Night, on 7 and 8 July, on the history of science. The first such event, held last year, was a considerable success with almost 15 000 visitors. The second Science Night, to be held in the magnificent setting of the Perle du Lac Park in Geneva, promises to be a winner too. By making science retell its own history, this major event is intended to show how every scientific and technical breakthrough is the culmination of a long period of growth that began hundreds of years in the past. Dozens of activities and events are included in this programme of time travel: visitors can study the night sky through telescopes and see what Galileo first observed, and then go to see a play on the life of the Italian scientist. Another play, commissioned specially for the occasion, will honour Geneva botanist De ...

  15. Variability of Late-Night Salivary Cortisol in Cushing Disease: A Prospective Study.

    Science.gov (United States)

    Sandouk, Zahrae; Johnston, Philip; Bunch, Dustin; Wang, Sihe; Bena, James; Hamrahian, Amir; Kennedy, Laurence

    2018-03-01

    The frequency of variable hormonogenesis in patients with Cushing disease (CD) but without cyclical symptoms is unclear. To assess the frequency of variable hormonogenesis in patients presenting with CD. Over a 6-month period, patients with confirmed or suspected CD provided late-night salivary samples for up to 42 consecutive nights. Of 19 patients confirmed to have CD, 16 provided at least 7 consecutive salivary samples, and 13 provided at least 21; these 16 patients are the subjects of this report. Twelve patients had at least three peak and two trough levels of late-night salivary cortisol (LNSC) but in only two patients were strict criteria for cyclical hormonogenesis fulfilled; variation was assessed as random in the others. Eight patients had de novo CD, and eight had recurrent/persistent disease. All patients with recurrent/persistent CD had two or more normal results, and in four of these patients, >50% of LNSC were normal. In six patients with de novo disease with at least one normal LNSC level, the maximum levels ranged from 1.55 to 15.5 times the upper limit of normal. Extreme fluctuations of cortisol production, measured by sequential LNSC, are common in CD. In newly diagnosed disease, this may only occasionally impair diagnostic ability, whereas in most patients with recurrent/persistent disease after pituitary surgery, LNSC is frequently within the reference range, with potential to cause diagnostic problems.

  16. Predictive value of night-time heart rate for cardiovascular events in hypertension. The ABP-International study.

    Science.gov (United States)

    Palatini, Paolo; Reboldi, Gianpaolo; Beilin, Lawrence J; Eguchi, Kazuo; Imai, Yutaka; Kario, Kazuomi; Ohkubo, Takayoshi; Pierdomenico, Sante D; Saladini, Francesca; Schwartz, Joseph E; Wing, Lindon; Verdecchia, Paolo

    2013-09-30

    Data from prospective cohort studies regarding the association between ambulatory heart rate (HR) and cardiovascular events (CVE) are conflicting. To investigate whether ambulatory HR predicts CVE in hypertension, we performed 24-hour ambulatory blood pressure and HR monitoring in 7600 hypertensive patients aged 52 ± 16 years from Italy, U.S.A., Japan, and Australia, included in the 'ABP-International' registry. All were untreated at baseline examination. Standardized hazard ratios for ambulatory HRs were computed, stratifying for cohort, and adjusting for age, gender, blood pressure, smoking, diabetes, serum total cholesterol and serum creatinine. During a median follow-up of 5.0 years there were 639 fatal and nonfatal CVE. In a multivariable Cox model, night-time HR predicted fatal combined with nonfatal CVE more closely than 24h HR (p=0.007 and =0.03, respectively). Daytime HR and the night:day HR ratio were not associated with CVE (p=0.07 and =0.18, respectively). The hazard ratio of the fatal combined with nonfatal CVE for a 10-beats/min increment of the night-time HR was 1.13 (95% CI, 1.04-1.22). This relationship remained significant when subjects taking beta-blockers during the follow-up (hazard ratio, 1.15; 95% CI, 1.05-1.25) or subjects who had an event within 5 years after enrollment (hazard ratio, 1.23; 95% CI, 1.05-1.45) were excluded from analysis. At variance with previous data obtained from general populations, ambulatory HR added to the risk stratification for fatal combined with nonfatal CVE in the hypertensive patients from the ABP-International study. Night-time HR was a better predictor of CVE than daytime HR. Copyright © 2013 Elsevier Ireland Ltd. All rights reserved.

  17. A Lunchtime Walk in Nature Enhances Restoration of Autonomic Control during Night-Time Sleep: Results from a Preliminary Study.

    Science.gov (United States)

    Gladwell, Valerie F; Kuoppa, Pekka; Tarvainen, Mika P; Rogerson, Mike

    2016-03-03

    Walking within nature (Green Exercise) has been shown to immediately enhance mental well-being but less is known about the impact on physiology and longer lasting effects. Heart rate variability (HRV) gives an indication of autonomic control of the heart, in particular vagal activity, with reduced HRV identified as a risk factor for cardiovascular disease. Night-time HRV allows vagal activity to be assessed whilst minimizing confounding influences of physical and mental activity. The aim of this study was to investigate whether a lunchtime walk in nature increases night-time HRV. Participants (n = 13) attended on two occasions to walk a 1.8 km route through a built or a natural environment. Pace was similar between the two walks. HRV was measured during sleep using a RR interval sensor (eMotion sensor) and was assessed at 1-2 h after participants noted that they had fallen asleep. Markers for vagal activity were significantly greater after the walk in nature compared to the built walk. Lunchtime walks in nature-based environments may provide a greater restorative effect as shown by vagal activity than equivalent built walks. Nature walks may improve essential recovery during night-time sleep, potentially enhancing physiological health.

  18. Short-term effects of night shift work on breast cancer risk: a cohort study of payroll data.

    Science.gov (United States)

    Vistisen, Helene Tilma; Garde, Anne Helene; Frydenberg, Morten; Christiansen, Peer; Hansen, Åse Marie; Andersen, Johnni; Bonde, Jens Peter E; Kolstad, Henrik A

    2017-01-01

    Objectives The objective was to examine if night shift work is a short-term risk factor for breast cancer, including combined estrogen receptor (ER) and human epidermal growth factor 2 (HER2) breast cancer subtypes. Methods The cohort comprised 155 540 public sector female workers in Denmark who were followed from 2007-2012. Day-to-day work-hour information was available from payroll registers and 1245 incident cases of breast cancer were identified in national cancer registries together with receptor subtype information. Results A rate ratio (RR) of 0.90 [95% confidence interval (95% CI) 0.80-1.01] was observed for workers ever working night shifts during the follow-up period compared with workers only working day shifts after adjustment for age, age at first child, parity, family history of breast or ovarian cancer, sex hormones, medications related to alcoholism, family educational level, mammography screening, and other potential confounders. Comparable results were seen for the inception population of employees with first recorded employment after 2007. Modestly increased RR were suggested for breast cancer subtypes characterized by a positive HER2 status irrespective of ER status. Conclusions These findings do not support an overall short-term effect of night shift work on breast cancer risk. Future studies should explore further the impact of HER2 status.

  19. Visual summation in night-flying sweat bees: a theoretical study.

    Science.gov (United States)

    Theobald, Jamie Carroll; Greiner, Birgit; Wcislo, William T; Warrant, Eric J

    2006-07-01

    Bees are predominantly diurnal; only a few groups fly at night. An evolutionary limitation that bees must overcome to inhabit dim environments is their eye type: bees possess apposition compound eyes, which are poorly suited to vision in dim light. Here, we theoretically examine how nocturnal bees Megalopta genalis fly at light levels usually reserved for insects bearing more sensitive superposition eyes. We find that neural summation should greatly increase M. genalis's visual reliability. Predicted spatial summation closely matches the morphology of laminal neurons believed to mediate such summation. Improved reliability costs acuity, but dark adapted bees already suffer optical blurring, and summation further degrades vision only slightly.

  20. Rotating night shifts too quickly may cause anxiety and decreased attentional performance, and impact prolactin levels during the subsequent day: a case control study.

    Science.gov (United States)

    Chang, Yu-San; Chen, Hsiang-Lan; Wu, Yu-Hsuan; Hsu, Chung-Yao; Liu, Ching-Kuan; Hsu, Chin

    2014-08-05

    We investigated circadian changes and effects on mood, sleep-related hormones and cognitive performance when nurses worked consecutive night shifts in a rapidly rotating shift system. Daytime cognitive function, sleep propensity and sleep-related hormones (growth hormone, cortisol, prolactin, thyrotropin) were compared after participants worked two and four consecutive night shifts. Twenty-three off-duty nurses, 20 nurses working two consecutive night shifts and 16 nurses working four consecutive night shifts were enrolled. All participants completed the Maintenance of Wakefulness Test, State-Trait Anxiety Inventory, Stanford Sleepiness Scale, visual attention tasks (VAT), Wisconsin Card Sorting Test, and modified Multiple Sleep Latency Test. Hormone levels were also measured four times throughout the day, at 2-h intervals. During the day, the participants in the night shift groups were less able to maintain wakefulness, had poor performance on VAT, and higher thyrotropin levels than did those in the off-duty group. Participants who worked two night shifts were better able to maintain wakefulness, had higher anxiety scale scores, poorer initial performance and lack of learning effect on VAT, and higher prolactin levels compared with those who worked four night shifts. There were no differences in cortisol levels between the two- and four- shift groups. Rotating night shifts too quickly may cause anxiety and decreased attentional performance, and may impact daytime prolactin levels after night shifts. It is possible that the two-shift group had a higher cortisol level than did the four-shift group, which would be consistent with the group's higher state anxiety scores. The negative findings may be due to the small sample size. Further studies on the effects of consecutive night shifts on mood and cortisol levels during the daytime after sleep restriction would be valuable.

  1. Isotope effect on superconductivity and Raman phonons of Pyrochlore Cd2Re2O7

    Science.gov (United States)

    Razavi, F. S.; Hajialamdari, M.; Reedyk, M.; Kremer, R. K.

    2018-06-01

    Cd2Re2O7 is the only α-Pyrochlore exhibiting superconductivity with a transition temperature (Tc) of ∼ 1 K. In this study, we present the effect of oxygen isotope (18O) as well as combined 18O and cadmium isotope (116Cd) substitution on the superconductivity and Raman scattering spectrum of Cd2Re2O7. The change of Tc and the energy gap Δ(T) are reported using various techniques including point contact spectroscopy. The shift in Raman phonon frequencies upon isotope substitution will be compared with measurement of the isotope effect on the superconducting transition temperature.

  2. Sleep inertia associated with a 10-min nap before the commute home following a night shift: A laboratory simulation study.

    Science.gov (United States)

    Hilditch, Cassie J; Dorrian, Jillian; Centofanti, Stephanie A; Van Dongen, Hans P; Banks, Siobhan

    2017-02-01

    Night shift workers are at risk of road accidents due to sleepiness on the commute home. A brief nap at the end of the night shift, before the commute, may serve as a sleepiness countermeasure. However, there is potential for sleep inertia, i.e. transient impairment immediately after awakening from the nap. We investigated whether sleep inertia diminishes the effectiveness of napping as a sleepiness countermeasure before a simulated commute after a simulated night shift. N=21 healthy subjects (aged 21-35 y; 12 females) participated in a 3-day laboratory study. After a baseline night, subjects were kept awake for 27h for a simulated night shift. They were randomised to either receive a 10-min nap ending at 04:00 plus a 10-min pre-drive nap ending at 07:10 (10-NAP) or total sleep deprivation (NO-NAP). A 40-min York highway driving task was performed at 07:15 to simulate the commute. A 3-min psychomotor vigilance test (PVT-B) and the Samn-Perelli Fatigue Scale (SP-Fatigue) were administered at 06:30 (pre-nap), 07:12 (post-nap), and 07:55 (post-drive). In the 10-NAP condition, total pre-drive nap sleep time was 9.1±1.2min (mean±SD), with 1.3±1.9min spent in slow wave sleep, as determined polysomnographically. There was no difference between conditions in PVT-B performance at 06:30 (before the nap). In the 10-NAP condition, PVT-B performance was worse after the nap (07:12) compared to before the nap (06:30); no change across time was found in the NO-NAP condition. There was no significant difference between conditions in PVT-B performance after the drive. SP-Fatigue and driving performance did not differ significantly between conditions. In conclusion, the pre-drive nap showed objective, but not subjective, evidence of sleep inertia immediately after awakening. The 10-min nap did not affect driving performance during the simulated commute home, and was not effective as a sleepiness countermeasure. Copyright © 2015 Elsevier Ltd. All rights reserved.

  3. Rotating night shift work and physical activity of nurses and midwives in the cross-sectional study in Łódź, Poland.

    Science.gov (United States)

    Peplonska, Beata; Bukowska, Agnieszka; Sobala, Wojciech

    2014-12-01

    Shift work have been thought to restrict participation in leisure time activities, but the knowledge about physical activity in rotating night shift nurses has been limited so far. We investigated the associations between the rotating night shift work and physical activity using data from a cross-sectional study among nurses and midwives. This study included 354 nurses and midwives (aged 40-60) currently working rotating night shifts and 371 ones working days only. The information on the work characteristics and potential covariates was collected via a personal interview. Weight and height were measured and BMI was calculated. Physical activity was assessed according to the international questionnaire on physical activity - IPAQ, and four domains: leisure time, occupational, transport related and household were analyzed. Women who reported none leisure time activity were defined as recreationally "inactive". The associations were examined with multiple linear or logistic regression models adjusted for age, season of the year, number of full term births, marital status and BMI. Total and occupational physical activity was significantly higher among nurses working rotating night shifts. However, leisure time activity was significantly affected among rotating night shift nurses and midwives, compared to women working during the days only, with increased odds ratio for recreational "inactivity" (OR = 1.57, 95% CI: 1.11-2.20). Rotating night shift work among nurses and midwives is associated with higher occupational physical activity but lower leisure time activity. Initiatives supporting exercising among night shift workers are recommended.

  4. Shift work, night work, and the risk of prostate cancer: A meta-analysis based on 9 cohort studies.

    Science.gov (United States)

    Du, Hong-Bing; Bin, Kai-Yun; Liu, Wen-Hong; Yang, Feng-Sheng

    2017-11-01

    Epidemiology studies suggested that shift work or night work may be linked to prostate cancer (PCa); the relationship, however, remains controversy. PubMed, ScienceDirect, and Embase (Ovid) databases were searched before (started from the building of the databases) February 4, 2017 for eligible cohort studies. We pooled the evidence included by a random- or fixed-effect model, according to the heterogeneity. A predefined subgroup analysis was conducted to see the potential discrepancy between groups. Sensitivity analysis was used to test whether our results were stale. Nine cohort studies were eligible for meta-analysis with 2,570,790 male subjects. Our meta-analysis showed that, under the fixed-effect model, the pooled relevant risk (RR) of PCa was 1.05 (95% confidence interval [CI]: 1.00, 1.11; P = .06; I = 24.00%) for men who had ever engaged in night shift work; and under the random-effect model, the pooled RR was 1.08 (0.99, 1.17; P = .08; I = 24.00%). Subgroup analysis showed the RR of PCa among males in western countries was 1.05 (95% CI: 0.99, 1.11; P = .09; I = 0.00%), while among Asian countries it was 2.45 (95% CI: 1.19, 5.04; P = .02; I = 0.00%); and the RR was 1.04 (95% CI: 0.95, 1.14; P = .40; I = 29.20%) for the high-quality group compared with 1.21 (95% CI: 1.03, 1.41; P = .02; I = 0.00%) for the moderate/low-quality group. Sensitivity analysis showed robust results. Based on the current evidence of cohort studies, we found no obvious association between night shift work and PCa. However, our subgroup analysis suggests that night shift work may increase the risk of PCa in Asian men. Some evidence of a small study effect was observed in this meta-analysis.

  5. Importance of Night Dreams in Ibsen's Plays A Psychoanalytic study of The Vikings of Helgeland and Little Eyolf

    OpenAIRE

    Bardzimashvili, Nino

    2014-01-01

    The topic for my thesis is the importance of night dreams in Henrik Ibsen's plays. My study of the subject is based on two plays, The Vikings of Helgeland and Little Eyolf. The first one is a historical play written in 1857 and is usually discussed in relationship with nationalism and the political events in 19th century Norway. The second one is known as a "family romance" and was written in 1894. These two plays represent different periods of Henrik Ibsen's writing and hence it is...

  6. Filmer le travail dans un train postal. À propos de Night Mail Filming work in a mail train. A study of Night Mail Filmar el trabajo en un tren de correos. Acerca de Night Mail

    Directory of Open Access Journals (Sweden)

    Pierre Maillot

    2013-03-01

    Full Text Available Night Mail est un documentaire de court-métrage sur le travail du tri postal dans les transports ferroviaires de nuit, produit par le service cinéma du GPO (General Post Office, Ministère des Postes du Royaume-Uni, en 1936. C’est d’abord, pour l’organisme d’État qui le produit, un film sur la Poste et les postiers qu’ils soient sur le terrain, à bord du train, ou dans les bureaux. Le film est nécessairement conduit à traiter aussi le travail de la compagnie de chemin de fer qui achemine le courrier, et donc celui des cheminots, de tous les cheminots. Ceux qui sont à la manipulation des machines, sur la voie, dans les gares traversées au long du trajet, et ceux des bureaux qui assurent les liaisons par téléphone, morse, et l’ensemble des télécommunications de l’époque en plein développement (1936. Le film devient ainsi une réflexion sur l’institution, les institutions, leur organisation, et leur collaboration sans laquelle il n’y a pas de travail possible. L’objectif central de cet article est d’offrir à ceux des sociologues qui s’intéressent à la sociologie filmique, des éléments pour comprendre les possibilités conceptuelles de l’écriture filmique.Night Mail, a short documentary about mail sorting on night trains, was produced by the UK General Post Office’s cinema department back in 1936. The first thing that can be said about this state-produced film is that it talks about the post office but also its employees, with some doing their pick-up rounds and others working on the train or in an office. It also necessarily highlights the work done by the rail company carrying the mail, focusing on different kinds of rail workers including machine operators, line maintenance crews or staff from the stations that the train passes through during the movie. On top of this, there are also railway office employees responsible for telephone connections, telegraph messages and all kinds of

  7. Cardiac and vascular structure and function parameters do not improve with alternate nightly home hemodialysis: An interventional cohort study

    Directory of Open Access Journals (Sweden)

    Johnson David W

    2011-10-01

    Full Text Available Abstract Background Nightly extended hours hemodialysis may improve left ventricular hypertrophy and function and endothelial function but presents problems of sustainability and increased cost. The effect of alternate nightly home hemodialysis (NHD on cardiovascular structure and function is not known. Methods Sixty-three patients on standard hemodialysis (SHD: 3.5-6 hours/session, 3-5 sessions weekly converted to NHD (6-10 hours/session overnight for 3-5 sessions weekly. 2Dimensional transthoracic echocardiography and ultrasound measures of brachial artery reactivity (BAR, carotid intima-media thickness (CIMT, total arterial compliance (TAC and augmentation index (AIX were performed post dialysis at baseline and 18-24 months following conversion to NHD. In 37 patients, indices of oxidative stress: plasma malonyldialdehyde (MDA and anti-oxidant enzymes: catalase (CAT, glutathione peroxidase (GPX and superoxide dismutase (SOD activity and total antioxidant status (TAS were measured at baseline, 3 and 6 months. Results Left ventricular mass index (LVMI remained stable. Despite significant derangement at baseline, there were no changes in diastolic function measures, CIMT, BAR and TAC. AIX increased. Conversion to NHD improved bone mineral metabolism parameters and blood pressure control. Interdialytic weight gains increased. No definite improvements in measures of oxidative stress were demonstrated. Conclusions Despite improvement in uremic toxin levels and some cardiovascular risk factors, conversion to an alternate nightly NHD regimen did not improve cardiovascular structure and function. Continuing suboptimal control of uremic toxins and interdialytic weight gains may be a possible explanation. This study adds to the increasing uncertainty about the nature of improvement in cardiovascular parameters with conversion to intensive hemodialysis regimens. Future randomized controlled trials will be important to determine whether increases in

  8. Night traffic and health: Results of laboratory and field studies; Naechtlicher Verkehrslaerm und Gesundheit: Ergebnisse von Labor- und Feldstudien

    Energy Technology Data Exchange (ETDEWEB)

    Maschke, C. [Technische Univ. Berlin (Germany). Inst. fuer Technische Akustik; Ising, H. [Umweltbundesamt, Berlin (Germany). Inst. fuer Wasser-, Boden-, und Lufthygiene; Arndt, D. [Robert Koch-Institut, Medizinische Diagnostik - Umweltmedizin, Berlin (Germany)

    1995-04-01

    The present article summarizes the results obtained in the Berlin laboratory and field studies on `noise-induced stress reactions`. Unaccustomed air-traffic noise at night leads to elevated epinephrine and cortisol levels. If road traffic noise at night rises above the accustomed level, this leads to enhanced renal cortisol secretion. Noise at night deserves to be termed a stressor because it is able to activate both the hypothalamic-pituitary-adrenocortical and the hypothalamic-adrenomedullar control loop. Elevation of epinephrine secretion was more distinct in the air-traffic field study than it was in the laboratory study. The relative elevation of cortisol secretion in the field study was of the same order as that of epinephrine secretion. Noise-induced noctural elevation of epinephrine secretion seems only to occur in the case of unaccustomed noise levels. If exposure to noise is prolonged, it subsides in an adaptive process and gives way to an elevated cortisol secretion. Elevation of both cortisol and epinephrine secretion is indicative of a stressing traffic noise situation. Air-traffic noise was found to impair subjective sleep quality and lead to a rise in epinephrine secretion both in the laboratory and the field study. No correlation was found between noise emission from low-flying aircraft and epinephrine or cortisol secretion in the field study. Neither the field nor the laboratory study showed a correlation between the number of night flights and catecholamine secretion. Cortisol secretion remained equally unaffected by the number of flights. The present results confirm the hypothesis that air and road traffic noise cause bodily distress. Chronic exposure to noise at night must therfore be regarded as a health hazard. (orig./MG) [Deutsch] Ungewohnter naechtlicher Fluglaerm fuehrt zu einer erhoehten Adrenalin-und Cortisolausscheidung. Wird die Intensitaet eines gewohnten naechtlichen Strassenverkehrslaerms erhoeht, ist eine vermehrte renale

  9. Early initiation of night-time NIV in an outpatient setting: a randomized non-inferiority study in ALS patients.

    Science.gov (United States)

    Bertella, Enrica; Banfi, Paolo; Paneroni, Mara; Grilli, Silvia; Bianchi, Luca; Volpato, Eleonora; Vitacca, Michele

    2017-12-01

    In patients with amyotrophic lateral sclerosis (ALS), non-invasive ventilation (NIV) is usually initiated in an in-hospital regime. We investigated if NIV initiated in an outpatient setting can be as effective in terms of patients' acceptance/adherence. We also evaluated factors predicting NIV acceptance and adherence and disease progression. Prospective randomized study. Outpatient versus inpatient rehabilitation. ALS patients. ALS patients were randomized to two groups for NIV initiation: outpatients versus inpatients. At baseline (T0), end of NIV trial program (T1) and after 3 months from T1 (T2), respiratory function tests, blood gas analysis, and sleep study were performed. At T1, we assessed: NIV acceptance (>4 h/night), and dyspnea symptoms (day/night) by Visual analogue scale (VAS), staff and patients' experience (how difficult NIV was to accept, how difficult ventilator was to manage, satisfaction); at T2: NIV adherence (>120 h/month) and patients' experience. Fifty patients participated. There were no differences in acceptance failure (P=0.733) or adherence failure (P=0.529). At T1, outpatients had longer hours of nocturnal ventilation (PNIV acceptance/adherence failure. There were no between-group differences in progression of respiratory impairment, symptoms and sleep quality. Early outpatient initiation of NIV in ALS is as effective as inpatient initiation.

  10. Gender-specific association between night-work exposure and type-2 diabetes: results from longitudinal study of adult health, ELSA-Brasil.

    Science.gov (United States)

    Silva-Costa, Aline; Rotenberg, Lúcia; Nobre, Aline Araújo; Schmidt, Maria Inês; Chor, Dora; Griep, Rosane Härter

    2015-11-01

    Diabetes is a multifactorial disease of increasing prevalence. The literature suggests an impact of night work on metabolic components, though the relationship with diabetes is unclear. Our aim was to investigate gender-specific associations between night work and type-2 diabetes (DM2) or impaired glucose tolerance (IGT) using baseline data of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). The cohort comprised 15 105 civil servants, aged 35-74 years. Baseline assessments (2008-2010) included clinical and laboratory measurements and interviews on sociodemographic, occupational, and health characteristics. In the baseline sample (N=14 427), 19.6% were classified as having DM2 and 20.5% as having IGT. Mean age was 52.1 (SD 9.1) years. A total of 2041 participants worked at night for 1-20 years and 687 for >20 years. Among women exposed to night work for >20 years compared with no night work after adjustments for potential confounders, including obesity, the odds ratios (OR) derived from multinomial logistic regression for DM2 and IGT were 1.42 [95% confidence interval (95% CI) 1.39-1.45] and 0.96 (95% CI 0.94-0.99), respectively. Among men exposed to night work for >20 years compared with no night work, the OR for DM2 and IGT were 1.06 (95% CI 1.04-1.08) and 0.99 (95% CI 0.98-1.01), respectively. The association between years of night work and diabetes is stronger among women than men. Longitudinal studies from ELSA-Brasil will be able to corroborate or refute these findings.

  11. Differences in cortisol profiles and circadian adjustment time between nurses working night shifts and regular day shifts: A prospective longitudinal study.

    Science.gov (United States)

    Niu, Shu-Fen; Chung, Min-Huey; Chu, Hsin; Tsai, Jui-Chen; Lin, Chun-Chieh; Liao, Yuan-Mei; Ou, Keng-Liang; O'Brien, Anthony Paul; Chou, Kuei-Ru

    2015-07-01

    This study explored the differences in the circadian salivary cortisol profiles between nurses working night shifts and regular day shifts following a slow rotating shift schedule to assess the number of days required for adjusting the circadian rhythm of salivary cortisol levels in nurses working consecutive night shifts and the number of days off required to restore the diurnal circadian rhythm of salivary cortisol levels. This was a prospective, longitudinal, parallel-group comparative study. The participants were randomly assigned to night and day-shift groups, and saliva samples were collected to measure their cortisol levels and circadian secretion patterns. Significant differences were observed in the overall salivary cortisol pattern parameters (cortisol awakening response, changes in cortisol profiles between 6 and 12h after awakening, and changes in cortisol profiles between 30 min and 12 h after awakening) from Days 2 to 4 of the workdays between both groups. However, on Day 2 of the days off, both groups exhibited similar cortisol profiles and the cortisol profiles in the night-shift group were restored. Nurses working night shifts require at least 4 days to adjust their circadian rhythms of cortisol secretions. Moreover, on changing from night shift to other shifts, nurses must be allowed more than 2 days off work. Copyright © 2015 Elsevier Ltd. All rights reserved.

  12. Managing the Urban Image. Cities as Scenery for Events: A White Night Event as a Case Study

    Directory of Open Access Journals (Sweden)

    ELENI ATHANASOPOULOU

    2015-12-01

    Full Text Available Organizing street events in the cities is not something new. Many cultural, social or religious events take place on the streets, whereas many of them have become international events and attract pan-european attention and coverage. Mega cities are organizing festivals and cultural events in order to attract tourists and contribute to local and regional development. This trend has started growing and spreading around Europe. Medium-sized cities are also organising such multi-dimensional public space events. As a case study it is interesting to present a white night event that took place in Kalamata (a medium-sized city in southern Greece, in August 2013. The shops stayed open until 3 in the morning, offering their products at reduced prices and encouraging people to consume. The city center provided the scenery for an alternative massive celebration. Parties were thrown and concerts took place, around the city. Many people from the Kalamata Region visited Kalamata City. The success was unexpected. This article describes what good can come out of the adoption of a successful north-European cultural white night event (in St. Petersburg and elsewhere. The implementation of an interesting idea, adjusted to the local circumstances, is worth to be looked into. The article concludes that urban scenery can play an important role to the organisation and success of such multicultural events.

  13. Youth Studies and Timescapes: Insights from an Ethnographic Study of "Young Night Drifters" in Hong Kong's Public Housing Estates

    Science.gov (United States)

    Groves, Julian M.; Ho, Wai-Yip; Siu, Kaxton

    2012-01-01

    This article draws on insights from the sociology of time to examine how scheduling influences social interaction and identity among young people and those who work with them. Drawing on an ethnographic analysis of "Young Night Drifters" and youth outreach social workers in Hong Kong's public housing estates, we create a framework to…

  14. Molecular profiling of complete congenital stationary night blindness: a pilot study on an Indian cohort.

    Science.gov (United States)

    Malaichamy, Sivasankar; Sen, Parveen; Sachidanandam, Ramya; Arokiasamy, Tharigopala; Lancelot, Marie Elise; Audo, Isabelle; Zeitz, Christina; Soumittra, Nagasamy

    2014-01-01

    Congenital stationary night blindness (CSNB) is a non-progressive retinal disorder that shows genetic and clinical heterogeneity. CSNB is inherited as an autosomal recessive, autosomal dominant, or X-linked recessive trait and shows a good genotype-phenotype correlation. Clinically, CSNB is classified as the Riggs type and the Schubert-Bornschein type. The latter form is further sub-classified into complete and incomplete forms based on specific waveforms on the electroretinogram (ERG). There are no molecular genetic data for CSNB in the Indian population. Therefore, we present for the first time molecular profiling of eight families with complete CSNB (cCSNB). The index patients and their other affected family members were comprehensively evaluated for the phenotype, including complete ophthalmic evaluation, ERG, fundus autofluorescence, optical coherence tomography, and color vision test. The known gene defects for cCSNB, LRIT3, TRPM1, GRM6, GPR179, and NYX, were screened by PCR direct sequencing. Bioinformatic analyses were performed using SIFT and PolyPhen for the identified missense mutations. All eight affected index patients and affected family members were identified as having cCSNB based on their ERG waveforms. Mutations in the TRPM1 gene were identified in six index patients. The two remaining index patients each carried a GPR179 and GRM6 mutation. Seven of the patients revealed homozygous mutations, while one patient showed a compound heterozygous mutation. Six of the eight mutations identified are novel. This is the first report on molecular profiling of candidate genes in CSNB in an Indian cohort. As shown for other cohorts, TRPM1 seems to be a major gene defect in patients with cCSNB in India.

  15. Nightmares and Night Terrors

    Science.gov (United States)

    ... able to tell you what happened in the dream and why it was scary. Your child may have trouble going back to sleep. Your child might have the same dream again on other nights. What are night terrors? ...

  16. Adnyamathanha Night Skies

    Science.gov (United States)

    Curnow, Paul

    2009-06-01

    Aboriginal Australians have been viewing the night skies of Australia for some 45,000 years and possibly much longer. During this time they have been able to develop a complex knowledge of the night sky, the terrestrial environment in addition to seasonal changes. However, few of us in contemporary society have an in-depth knowledge of the nightly waltz of stars above.

  17. Nonelective surgery at night and in-hospital mortality Prospective observational data from the European Surgical Outcomes Study

    NARCIS (Netherlands)

    van Zaane, Bas; van Klei, Wilton A.; Buhre, Wolfgang F.; Bauer, Peter; Boerma, E. Christiaan; Hoeft, Andreas; Metnitz, Philipp; Moreno, Rui P.; Pearse, Rupert; Pelosi, Paolo; Sander, Michael; Vallet, Benoit; Pettilä, Ville; Vincent, Jean-Louis; Rhodes, Andrew; Moreno, Rui; Spies, Claudia; Hoste, Eric; Huyghens, Luc; Jacobs, Rita; van Mossevelde, Veerle; Opdenacker, Godelieve; Poelaert, Jan; Spapen, Herbert; Leleu, Kris; Rijckaert, Dirk; de Decker, Koen; Foubert, Luc; de Neve, Nikolaas; Biston, Patrick; Piagnerelli, Michael; Collin, Vincent; den Blauwen, Nadia; Clauwaert, Charlotte; de Crop, Luc; Verbeke, An; Derumeaux, Pieter; Gardin, Christophe; Kindt, Sebastiaan; Louage, Sofie; Verhamme, Bruno; Druwé, Patrick; Lahaye, Ingrid; Rosseel, Francis; Rutsaert, Robert; Vanlinthout, Luc; de Kock, Marc; Forget, Patrice; Georges, Pascal; Grosu, Irina; Kahn, David; Lois, Fernande; Momeni, Mona; Yemnga, Audrey Pospiech Bernadette; Jadoul, Jean-Luc; Malbrain, Manu; Bosinceanu, Dana; Collard, Edith; Jorens, Philippe; Reyntiens, Dirk; Smitz, Carine; Vercauteren, Marcel; Fagnoul, David; van Obbergh, Luc; Goranović, Tatjana; Mazul-Sunko, Branka; Toplice, Krapinske; Oremuš, Krešimir; Bešlić, Gabrijela; Duzel, Viktor; Hauptman, Ada; Peremin, Sanja; Šribar, Andrej; Župčić, Miroslav; Benčević, Josip; Brod, Slavonski; Mirković, Ivan; Šarić Bauer, Zlata; Belavić, Matija; Blažanin, Božidar; Lončarić Katušin, Mirjana; Brozović Krijan, Antonija; Mišković, Petar; Šimić-Korać, Nataša; Topić, Jasna; Žilić, Antonio; Žunić, Josip; Acan, Ivana; Adanić, Mirta; Ivanov, Nikola; Pavičić Šarić, Jadranka; Tomulić, Katarina; Visković, Nataša; Bošnjak, Silvana; Haršanji Drenjančevic, Ivana; Kristek, Gordana; Kvolik, Slavica; Markić, Stela; Stojanovic Rakipovic, Andreja; Tot, Ozana Katarina; Venzera-Azenic, Darija; Fabris, Lada Kalagac; Bačak-Kocman, Iva; Balenović, Igor; Bandić, Daniela; Deutsch, Patricia Adrianne Judith; Divjak, Loredana; Grčić Filipović, Ina; Gužvinec, Zvonka; Krznarić, Zrinka; Lončarić, Yvonne; Magaš, Jelena Vadlja; Mitrović, Marek; Okić, Marija; Pavlek, Mario; Ramov, Elza; Rezek, Karolina; Sekulić, Ante; Tomasevic, Boris; Mirić, Mirjana; Tomašević, Anita; Tomić Mahečić, Tina; Vrbanović, Vilena; Bobinac, Mirna; Božić, Alfred; Debelic, Danijela; Frkovic, Vedran; Mladić Batinica, Inga; Baranović, Senka; Gavranović, Željka; Kikec, Mirna; Maldini, Branka; Marić, Stela; Agnić, Ivan; Delić, Nikola; Dropulić, Nataša; Kljaković Gašpić, Toni; Ilić, Darko; Ivančev, Božena; Karanović, Nenad; Kuščević, Dorjan; Marović, Zlatko; Milić, Matija; Nevešćanin, Ana; Petković, Tatjana; Smoje, Mario; Brozović, Gordana; Jelisavac, Milana; Matolić, Martina; Oberhofer, Dagmar; Pavičić, Ana Marija; Šakić, Kata; Bozovic, Margarita Delija; Krecek, Zvjezdana Kotorac; Krobot, Renata; Andabaka, Tatjana; Bratanić, Mislav; Dzepina, Orjana; Kraljev, Martina; Šeric, Julija; Šimurina, Tatjana; Grujić, Rosa; Nacevski-Bulaja, Biljana; Barižon, Mirna; Danira, Vrančić; Dražen, Bulaja; Dušanka, Kimer; Bašić Halužan, Marijana; Joško, Žaja; Katica, Roca; Labor, Magda; Grgurević Marinković, Tea; Mihovilčević, Danči; Marija, Bego; Srečko, Marinković; Vranković, Srđan; Kyprianou, Theodoros; Neophytou, Kyriakos; Cerny, Vladimir; Cvachovec, Karel; Belikova, Barbora; Drab, Michal; Hudacek, Kamil; Krikava, Ivo; Stourac, Petr; Zadrazilova, Katarina; Bicek, Vladimír; Brabcová, Milena; Klozová, Radka; Vajter, Jaromír; Vymazal, Tomáš; Toft, Palle; Blichfeldt, Louise; Hansen, Bo Dilling; Moller, Kirsten; Nielsen, Jeppe Sylvest; Frederiksen, Joachim; Dohn Andersen, Johnny; Kühne, Jan Peter; Leivdal, Siv; Stendell, Line; Simonsen, Martin; Zoltowski, Marcin Konrad; Ali, Zahida Salman; Freundlich, Morten; Pilypaite, Jurgita; Clausen, Nicola Groes; Thorup, Line; Hansen, Frank; Bestle, Morten; Hansen, Christian Steen; Afshari, Arash; Bastholm Bille, Anders; Lefort, Michele; Secher, Erik L.; Liboriussen, Lisbeth; Herodes, Veiko; Marvet, Kadri; Pool, Kristiina; Kallas, Pille; Mägi, Triinu-Kreete; Sütt, Jaan; Vijar, Kerli; Visk, Evelin; Vinnal, Mare; Ellermaa, Jaanus; Liibusk, Liia; Tikkerberi, Artur; Falk, Ilme; Mällo, Esta; Talving, Jaak; Pettila, Ville; Hovilehto, Seppo; Kirsi, Anne; Mustola, Seppo; Tiainen, Pekka; Toivonen, Juhani; Dabnell, Sandra; Kaminski, Tadeusz; Kaukonen, Maija; Silvasti, Päivi; Vainio, Kaisa; Lund, Vesa; Sjövall, Sari; Saarinen, Kari; Viitanen, Matti; Ahonen, Tommi; Alaspää, Ari; Zittling, Ritva; Aarne, Saarikoski; Annette, Moisander; Bodo, Wagner; Laru-Sompa, Raili; Elomaa, Esa; Lavonen, Leena; Nevantaus, Juha; Geier, Klaus; Kavasmaa, Tomi; Koorits, Ursula; Kubjas, Mari; Lauritsalo, Seppo; Ottelin, Lauri; Palve, Markki; Pynnönen, Jari; Raabis, Inga; Saarelainen, Minna; Heikkilä, Tapani; Kontula, Timo; Lehtimäki, Markku; Liimatainen, Jari; Moilanen-Oikarinen, Mari; Pakarinen, Marika; Palanne, Riku; Seppänen, Hanna; Pulkkinen, Anni; Vääräniemi, Heikki; Kainuun Keskussairaala, Kajaani; Paananen, Sami; Koskenkari, Juha; Sälkiö, Sinikka; Vakkala, Merja; Koskue, Talvikki; Loisa, Pekka; Ruut, Laitio; Hautamäki, Raku; Koivisto, Simo-Pekka; Futier, Emmanuel; Lefrant, Jean-Yves; Leon, Alain; Bonnet, Francis; Marret, Emmanuel; Spielvogel, Catherine; Papageorgiou, Chryssa; Szymkiewicz, Olga; Tounou-Akue, Felix; Aubrun, Frederic; Bonnet, Aurélie; Gazon, Mathieu; Guiraud, Michel; Laurent, Virginie; Béclère, Antoine; Tachon, Guillaume; Demars, Nadège; Dumenil, Anne-Sylvie; Mercier, Frederic J.; Landais, Alain; Mentec, Herve; Bazin, Marie; Gonnu, Sophie; Petit, Antoine; Albaladejo, Pierre; Almeras, Luc; Bataillard, Amélie; Rossi-Blancher, Marine; Lefrant, Jean Yves; Barthel, Florian; Hallel, Dan; Sbai, Hicham; Khalifeh, Pamela; Lidzborski, Lionel; Jully, Marion; Platon, Ecaterina; Pottecher, Julien; Baumgarten, Romain; Schultz, Christel; ElMiloudi, Fayçal; Lefebvre, Julie; Waton, Karen; Sprunck, Adrien; Steib, Annick; Thibaud, Adrien; Thuet, Vincent; Kieffer, Vianney; Dubois-Vallaud, Delphine; Jacob, Laurent; Becanne, Xavier; Cherfaoui, Salim; Gauzit, Remy; Godier, Anne; Lakhdari, Mourad; Samma, Charles Marc; Bigeon, Jean Yves; Burtin, Philippe; Halchini, Constantin; Lacroix, Magali; Pinna, Frederic; Barbes, Aurélie; Just, Bernard; Mateu, Philippe; Benayoun, Laurent; Berger, Philippe; Granier, Nathalie; Perrigault, Pierre Francois; Libert, Nicolas; de Rudnicki, Stephan; Merat, Stéphane; Bourdet, Benoit; Ferré, Fabrice; Minville, Vincent; Piriou, Vincent; Rague, Philippe; Wallet, Florent; Lebuffe, Gilles; Desbordes, Jacques; Robin, Emmanuel; Ichai, Carole; Orban, Jean-Christophe; Marx, Gernot; Gottschalk, André; Piontek, André; Unterberg, Matthias; Hilpert, Justus; Kees, Martin; Triltsch, Andreas; Wiegand-Löhnert, Carola; Glöckner, Christiane; Hohn, Andreas; Rose, Elmar; Schröder, Stefan; Wiese, Oliver; Awlakpui, Eli; Scheidemann, Mona; Wittmann, Maria; Ramminger, Axel; Gama de Abreu, Marcelo; Heller, Axel R.; Marx, Christine; Neidel, Julia; Goldmann, Anton; von Heymann, Christian; Laetsch, Beatrix; Maahs, Esther; Scholz, Lars; Frenzel, Dirk; Massarat, Kyros; Lenhart, Franz-Peter; Reichle, Florian; Rudlof, Kristina; Borchers, Friedrich; Buettner, Christoph; Schmutzler, Martin; Burgard, Gerald; Lucht, Alexander; Wagner, Jan; Pilge, Stefanie; Schneider, Gerhard; Untergehrer, Gisela; Bis, Beata; Krassler, Jens; Dittmann, Jan; Haberkorn, Jörg; Eberitsch, Jürgen; Eberitsch, Karola; Nippraschk, Thomas; Wepler, Ulrich; Engelen, Wolf-Christian; Nau, Carla; Scholler, Axel; Schüttler, Jürgen; Wintzheimer, Simone; Bloos, Frank; Braune, Anke; Fergen, Daniela; Ludewig, Katrin; Paxian, Markus; Reinhart, Konrad; Graf, Nikolaus; Schwarzkopf, Konrad; Berger, Katharina; Habicher, Marit; Kasperiunaite, Ruta; Savelsberg, Sabine; Krep, Henning; Reindl, Michael; Weber, Matthias; Bauer, Wolfgang; Bingold, Florian; Christ, Saskia; Friederich, Patrick; Kaviani, Reza; Auer, Patrick; Bonnländer, Georg; Drescher, Jürgen; Braun, Roland; Eichenauer, Tim; Kerner, John; Bierbaum, Kathrin; Brünner, Horst; Grond, Stefan; Perez-Platz, Ursula; Andresen, Bent; Linstedt, Ulf; Stegmann, Nils; Erkens, Uwe; Kopcke, Jens; Meyer, Andreas; Brestrich, Hartmut; Ernst, Sandra; Merkel, Stella; Krieger, Lena; Luers, Frank; Weyland, Andreas; Noeldge-Schomburg, Gabriele; Menckie, Thomas; Wasmund, Christina; Bredtmann, Ralph-Dieter; Erler, Ines; Haumann, Christine; Möllemann, Angela; Oehmichen, Uwe; Sergejewa, Olga; Lehning, Brigitte; Czeslick, Elke; Geyer, Michaela; Malcharek, Michael; Sablotzki, Armin; Stier, Marina; Feld, Florian; Rossaint, Rolf; Simon, Verena; Armaganidis, Apostolos; Koulenti, Despoina; Kotanidou, Anastasia; Nanas, Serafim; Papastylianou, Androula; Psevdi, Aikaterini; Stathopoulos, Anastasios; Voulas, Asklepieion; Kanna, Efthymia; Koutsikou, Anastasia; Moustaka, Alexandra; Chovas, Achilleas; Komnos, Apostolos; Zafiridis, Tilemachos; Franses, Josef; Lavrentieva, Athena; Koraki, Eleni; Katsenos, Chrysostomos; Kasianidou, Maria Flora; Nasopoulou, Pantelia; Spyropoulou, Eleni; Gousia, Chrysoula; Katsanoulas, Constantine; Lathyris, Dimitrios; Kyriazopoulos, George; Sfyras, Dimitrios; Tsirogianni, Athanasia; Kostopanagiotou, Georgia; Lignos, Mihail; Matsota, Paraskevi; Christopoulos, Christos; Mouratidou, Alexandra; Vrettou, Efstratia; Boufidis, Spyros; Moka, Eleni; Arnaoutoglou, Eleni; Koulouras, Vasileios; Nakos, George; Papathanakos, Georgios; Anthopoulos, Georgios; Choutas, Georgios; Karapanos, Dimitrios; Tzani, Vaso; Gkiokas, Georgios; Nastos, Konstantinos; Nikolakopoulos, Fotios; Dragoumanis, Christos; Nikitidis, Nikos; Pneumatikos, Ioannis; Theodorou, Vassiliki; Zacharouli, Danai; Kandi, Stella; Tasopoulos, Konstantinos; Arvaniti, Kostoula; Matamis, Dimitrios; Mplougoura, Eva; Petropoulou, Polixeni; Soumpasis, Ioannis; Amaniti, Ekaterini; Giannakou-Peftoulidou, Maria; Gkeka, Eleni; Soultati, Ioanna; Kokinou, Maria; Papatheodorou, Lambrini; Stafylaraki, Maria; Giasnetsova, Tatiana; Gritsi-Gerogianni, Nikoleta; Kydona, Christina; Kiskira, Olga; Koulentis, Ioannis; Apsokardos, Alexandros; Dimitropoulos, Konstantinos; Soldatou, Ourania; Nathanail, Christodoulos; Papazotos, Alexios; Kolotoura, Athina; Sartzi, Monika; Papanikolaou, Spiros; Polakis, Pavlos; Karatzas, Stylianos; Kyparissi, Aikaterini; Papavasilopoulou, Theonymfi; Koukoubani, Triantafillia; Mastora, Evangelia; Spyropoulou, Kyriaki; Papaioannou, Alexandra; Maragkou, Elisavet; Spring, Anna; Ioakeimidou, Stavros Evagelatos Aikaterini; Noulas, Nikos; Molnár, Zsolt; Csüllög, Emese; Elekes, Enikő; Katona, Zsuzsana; Kremer, Ildiko; Miko, Angela; Csomos, Akos; Galambos, Zsuzsanna; Szucs, Akos; Nyikos, Gyorgy; Szekeres, Gabor; Szabo, Ervin; Kranitz, Katalin; Simon, Melinda; Szigeti, Janos; Gaál, Emánuel; Havas, Attila; Ille, Alexandru; Bráz, Krisztina; Nagy, Geza; Sigurdsson, Gisli; Sigurbjörnsson, Fridrik T.; Sigurdsson, Gisli H.; Sigurdardottir, Elin Edda; Gunnarsson, Björn; Westbrook, Andrew; Broderick, Alan; Hafeez, Parvaiz; Hanumanthaiah, Deepak; Brohan, Janette; O'Chroinin, Donal; Bailey, Kevin; Ramamoorthy, Karthik G.; Doyle, Yvonne; Freir, Noelle; O'Rourke, James; Jonson, Philip; Saeed, Sabir; Hayes, Ivan; Loughrey, John; Frohlich, Stephen; McCauley, Nuala; Ryan, Donal; Fitzpatrick, Gerry; Kevin, Leo; Thomas, Jubil; Warde, Barry; Woolhead, Alan; Duggan, Michelle; Egan, Cara; Crowley, Seamus; Lebese, Soloman; Bergin, Anne; Page, Rory; Collins, Daniel; McKenny, Michael; Della Rocca, Giorgio; Grasso, Salvatore; Bresciani, Anna; Carmino, Livio; Ghelfi, Silvia; Lorenzelli, Laura; Novelli, Maria Teresa; Pescarmona, Chiara; Roasio, Agostino; Gatta, Alessandro; Nastasi, Mauro; Sanseverino, Manlio; Tinti, Carla; Bianchin, Andrea; Tormena, Maria Paola; Franco, Antonio; Marini, Federica; Rapido, Francesca; Bellotti, Ferdinando; Boninsegna, Daniele; Castellani, Gianluca; Sances, Daniele; Spano, Gianluca; Tredici, Stefano; Vezzoli, Dario; Fucecchio, Igneo; Bacci, Alessandro; Coppini, Roberta; Dell'unto, Sandro; Mori, Emanuele; Stanzani, Maria Rosa; Tosi, Monica; Collareta, Michele; Forfori, Francesco; Franchi, Matteo; Mancino, Giuseppe; Battistella, Massimo; Baricocchi, Elisa; Bona, Francesco; Debernardi, Felicino; Giacoletto, Gianmarco; Iacobellis, Antonio; Massucco, Paolo; Moselli, Nora; Muratore, Andrea; Palomba, Graziella; Sardo, Elena; de Simone, Michele; Suita, Luisa; Zocca, Edoardo; Bucci, Barbara; Corte, Francesco Della; Piciucco, Tiziana; Viarengo, Valeria; Pugliese, Francesco; Ruberto, Franco; Bettelli, Gabriella; Cantarini, Eugenia; Giampieri, Marina; Tanfani, Alessandra; Recchia, Eugenio; Milano, S. Raffaele; Bignami, Elena; Bruno, Giovanna; Costagliola, Roberto; Gandolfi, Azzurra; Greco, Massimiliano; Lembo, Rosalba; Monti, Giacomo; Nicelli, Elisa; Pasculli, Nicola; Turi, Stefano; Baroselli, Antonio; Brazzoni, Marcella; Buttazzoni, Mattia; Buttera, Stefania; Centonze, Carlo; Serena, Giovanni; Spagnesi, Lorenzo; Toretti, Ilaria; Vilardi, Anna; Zearo, Ester; Arpino, Ines; Baraldi, Sara; Guarnerio, Chiara; Molene, Vincenzo; Monea, Maria Concetta; Vaccarisi, Enrico; Vicari, Luigi; Albante, Alida; Aversano, Marco; Loiacono, Cinzia; Marandola, Maurizio; Fusari, Maurizio; Petrucci, Nicola; Galla, Amerigo; Mascia, Antonio; Primieri, Paolo; Di Noto, Anna; Gratarola, Angelo; Molin, Alessandro; Spagnolo, Luigi; Spena, Claudio; Bussolengo, Orlandi; Calligaro, Plinio; Marchiotto, Simonetta; Merlini, Alberto; Pedrazzoli, Eleonora; Perina, Giulia; Visentin, Renea; Fumagalli, Roberto; Garbagnati, Andrea; Manetti, Bruna; Snaier, Chiara; Somaini, Marta; Farnia, Antonio; Nani, Roberto; Pierantonio, Novello; de Michele, Michele; Gazzanelli, Sergio; Bergamini, Elena; Tassinati, Tania; Capuzzo, Maurizia; Cirillo, Vera; Tufano, Rosalba; Oggioni, Roberto; Parrini, Vieri; Brunori, Emanuela; Capone, Micaela; Carbone, Luigi; Corradetti, Francesco; Elisei, Daniele; Fiorentino, Stefano; Francesconi, Maurizio; Gattari, Diego; Gorgoglione, Maria; Iacobone, Emanuele; Minnucci, Francesco; Montironi, Claudio; Riccioni, Gianrenato; Tappata, Giuseppe; Zompanti, Valeria; Verdenelli, Paola; Cerutti, Elisabetta; Ranieri, Vito Marco; Golubovska, Iveta; Grigorjevs, Sergejs; Rikmane, Maija; Rozkalne, Daina; Stepanovs, Jevgenijs; Suba, Olegs; Kazune, Sigita; Miscuk, Aleksej; Nemme, Janis; Oss, Peteris; Sipylaite, Jurate; Macas, Andrius; Ragaisis, Vytautas; Kontrimaviciute, Egle; Tomkute, Gabija; Kramer, Irene Fleur; Poeze, Martijn; Ziekenhuis, Antonius; Maria, John; Pelzer, Gerardus; Winsser, Lex J. A.; Nijsten, Maarten; Schoorl, Michiel; Spanjersberg, Rob; Dieleman, Stefan; Koopman-van Gemert, A. W. M. M.; Bouw, Martijn; Pickkers, Peter; van der A, Marieke; Capelle, Ziekenhuis; Schreiner, Frodo; van den Berg, Roy; de Wit, Esther; Keijzer, Christaan; Hollmann, Markus W.; Preckel, Benedikt; van Acker, Gijs J. D.; Dennesen, Paul J. W.; Kuijpers-Visser, Agnes Gerda; Inan, T.; Ponssen, Huibert Hendrik; Brouwer, Tammo; Koopmans, Matty; van Bommel, Jasper; van Duijn, Ditty; van der Hoven, Ben; Ormskerk, Patricia; Beck, Oliver; Schiere, Sjouke; Reidinga, C.; Venema, Allart; Olthof, Kees; Flaatten, Hans; Jammer, Ib; Dokka, Vegard; Monsen, Svein Arne; Ytrebo, Lars Marius; Noursadeghi, Mostafa; Shahzad, Ahmed; Boksasp, Dagfinn; Roiss, Christoph; Strietzel, Hans Frank; Berntsen, Anne Gina Schie; Haugland, Helge; Vingsnes, Svein Ove; Axelsson, Patric; Risom Olsen, Thomas C.; Katre, Sanjay; Aakeroey, Kristin; Mikstacki, Adam; Tamowicz, Barbara; Bożiłow, Dominika; Goch, Robert; Grabowski, Piotr; Kupisiak, Jacek; Małłek, Małgorzata; Szyca, Robert; Jankowski, Grzegorz; Kościelniak, Władysław; Pietraszek, Paweł; Szarowar, Bartosz; Matos, Ricardo; França, Carlos; Lacerda, António Pais; Ormonde, Lucindo; Rosa, Rosário; Pereira, Inês; Vitor, Paula; Valente, Pulido; Lopes Marques Carvalho, Maria Raquel; Faria, Manuela; Almeida, Eduardo; Mealha, Rui; Vicente, Rachel; Monte, Raquel; Rua, Fernando; Barros, Nelson; Esteves, Francisco; Gouveia Pinheiro, Célia Maria; Oliveira, Vítor Miguel; Oliveira, Maria Fátima; Martins, Isabel; Saraiva, José Pedro; Assunção, José Pedro; Bártolo, Anabela; Carvalho, Anabela; Correia, Carlos; Martins, Salomé; Milheiro, Ruth; Diaz, Alejandro; Gonçalves, Maria Imelda; Ribeiro, Rosa; Estilita, Joana; Glória, Carlos; de Almeida, José; Barros, Filipa; Ramos, Armindo; Camara, Margarida; Maul, Edward Richard; Nobrega, Julio; Langner, Anuscka; Maia, Dionísio Faria; Afonso, Ofélia; Faria, Filomena; Cabral, Curry; Botelho, Maria Manuela; Ferreira, Pedro; Mourão, Luís; Oliveira, Ana Vintém; Resende, Margarida; Aleman, Miguel; Fonseca, Jorge; Isidoro, Marta; de Meneses, Helena; Pêgas, António; Pereira, José; Pereira, Luis; Ramos, Bárbara; Matos, Francisco; Martins, Ana; Ramos, Cristina; de Sousa, Manuel; Bento, Luís; Botas, Conceição; Lopes, Vitor; Mendes, Rosa; Grigoras, Ioana; Blaj, Mihaela; Damian, Mihaela; Lupusoru, Andreea; Ristescu, Irina; Codreanu, Monica; Diaconescu, Ciresica; Nistor, Alina; Stanescu Stelian, Dorin; Streanga, Livia; Berneanu, Maria; Bordeianu, Cristina; Florenta, Calarasu; Iacob, Alina; Lupu, Mary Nicoleta; Mocanu, Iulian; Moraru, Coca; Meran, Carleta; Nicolae, Bacalbasa; Sandu, Madalina; Turcanu, Roxana; Grigore, Monica; Hotaranu, Cristina; Popescu, Nicoleta; Baban, Oleg; Baciu, Manuela; Ciobanu, Aurica; Denciu, Catalin Ioan; Gurau, Vitalie; Maftei, Ion; Ungureanu, Liviu; Bogdan, Prodan; Corneci, Dan; Dinu, Melania; Madalina, Dutu; Silvius, Negoita; Tomescu, Dana; Gabriela, Droc; Dinescu, Stelian Adrian; Calin, Mitre; Ionescu, Daniela; Margarit, Simona; Vasian, Horatiu; Albu, Corina; Balasa, Carmen; Cadrigati, Alina; Dragulescu, Dorian; Gavra, Loredana; Hentia, Ciprian; Macarie, Claudiu; Manescu, Mihaela; Nediglea, Ioan; Ocica, Dana; Ovidiu, Bedreag; Papurica, Marius; Plavat, Cosmin; Popa, Claudia; Ramneantu, Mihaela; Sandici, Zoran; Sarandan, Mihaela; Belciu, Ioana; Tincu, Eugen; Ursu, Irina; Aignatoaie, Mariana; Huzuneanu, Mariana; Cocu, Simona; Hagau, Natalia; Ciubotaru, Roxana; Copotoiu, Ruxandra; Ioana, Ghitescu; Kovacs, Judit; Leonard, Azamfirei; Szederjesi, Ianos; Genoveva, Vanvu; Mosnegutu, Simona; Surbatovic, Maja; Djordjevic, Dragan; Djordjevic, Biljana; Grujic, Krasimirka; Jovanovic, Dusko; Krstic, Ivana; Zeba, Snjezana; Jevdjic, Jasna; Miletic, Milos; Zunic, Filip; Bulasevic, Aleksandra; Brko, Radoslava; Gazibegovic, Narcisa; Kendrisic, Mirjana; Vojinovic, Radisa; Firment, Jozef; Capková, Judita; Grochova, Monika; Trenkler, Stefan; Griger, Martin; Bakosova, Erika; Kvasnica, Martin; Saniova, Beata; Sulaj, Miroslav; Zacharovska, Andrea; Simkova, Alexandra; Číková, Andrea; Gebhardtova, Andrea; Hanuljaková, Slávka; Koutun, Juraj; Martonová, Andrea; Žilinčárová, Veronika; Galkova, Katarína; Krbila, Stefan; Sobona, Viliam; Ocenasova, Marieta; Novak-Jankovic, Vesna; Grynyuk, Andriy; Damjanovska, Marija; Kostadinov, Ivan; Knezevic, Mile; Malivojevic, Marko; Borovsak, Zvonko; Kamenik, Mirt; Mekiš, Dušan; Osojnik, Irena; Kosec, Lučka; Kapš, Silva Ostojič; Aleksic, Dragoslav; Gerjevič, Božena; Kalan, Katja; Ursic, Tomaz; Aldecoa, Cesar; Montejo González, Juan C.; Artigas, Anna; Garcia, Andres; Lisi, Alberto; Perez, Isabel; Perez, Gisela; Poch, Nuria; Vaquer, Sergi; Balciscueta, Goiatz; Barrasa, Helena; Cabanes, Sara; Maynar, Javier; Poveda, Yolanda; Rodero, Amaia Quintano; Garcia-Bunger, Beatriz; Elvira, Maria Adoracion; Lajara, Ana María; Palencia, María; Ramos, Rafael; Fernandez, Ana Saez; Tirapu León, Juan Pedro; López, Jaione Iza; Yoldi Murillo, Francisco Javier; Ramirez, Eva Turumbay; Rico, Patricia Unzué; Patricia, Marta; Vizcaíno, Martín; Bernat Álvarez, Maria José; Real, Kenneth Planas; Aracil, Norma; Menendez Bodega, Begoña; Fernández García, Raquel; Álvarez García, Marivi; Gordon, Quintana; Gutiérrez Jodrá, Alicia; de Santos López, Angela; Ros, Juan José Llavador; Soto, Rocío Ayala; Sepúlveda, Isabel; Díez, Esperanza Pascual; Fernández Fernández, Luisa; Gulina, Carlos Soria; Pérez Arviza, Laura; Mouriz Fernandez, Lorena; Gómez, Antía Río; Alonso Martínez, Concepción; Mouriz Rodríguez, Ana Belén; Lopez Soto, Carmen; Garcia, Clara; Lorenzo, Mario; Pinilla, Elena; Rico, Jesus; Ruperez, Irene; Alonso, Eduardo; Leira, Fernando; Maseda, David Pestaña Emilio; Royo, Concepcion; Villagran, Jose; Murillo Candi, Giralt; Esteva, Garcia Eduardo; Folgado, Raquel Mansilla; Fornaguera, Nadal Joan; Calonge Montse, Pijoan; Prat, Anna Sape; Sintes, Dolores; Arteta, Donaldo Arteta; García Delgado, Horacio; López-Cuervo, Juan Fajardo; López, Mikel Celaya; Ramírez, Alejandro; Saldaña, Francisco José; Aliste, Pilar; Anchuelo, Ana Hermira; García Campos, Ascensión; Catalán, Mercedes; García Gómez, Mónica; Gonzalez Gonzalaez, Olga; López López, Eloísa; Arlanzón de Quevedo, Sara; Gonzalez Serrano, Matilde; Perez-Cerdá Silvestre, Francisco; Martinez Torrente, Francisco; Arocas, Blanca; Soro, Marina; Maroto, Fernando; Robledo Algarra, Ruth; Aleixandre, Inés Silla; Rodriguez Argente, Gemma; Broseta Lleó, Ana; Rubio, Antonio Vela; Vicente Sánchez, José Luis; Enríquez Valcárcel, Irene; Balust, Clara; Balust, Jaume; Borrat, Xavier; Carretero, Maria Jose; Gracia, Isabel; Matute, Purificacion; Mercadal, Jordi; Pujol, Roger; Tena, Beatriz; Ubre, Marta; Albalad, Dolores Dorda; Muñoz Alcaide, Concepción; Caballero, Jesus; Montferrer Estruch, Nuria; Ferrer, Mercè Ballvé; Lacasta Fornells, Albert; Terrer Galera, Eduard; Garcia Martinez, Irene; Manrique Muñoz, Susana; Pelavski, Andres; Perez, Pilar Tormos; Gonzalez Posada, Miguel Angel; Chocron de Prat, Ivette; Rello, Jordi; Garcia Serrano, Llum; Naya Sieiro, José Manuel; Silva, Lorena; Colomina Sole, Maria Jose; Biarnes Suñé, Alfons; Rochera Villach, Isabel; Gómez Herreras, José Ignacio; Poves, Rodrigo; Martinez Rafael, Beatriz; Martinez Almeida, Icier; Fernandez Collates, Angel; Bartolomé, Maria Jose; Cimadevilla, Bonifacio; González González, Antonio Manuel; Rabanal Llevot, Jose Manuel; de Terán Mira, Juan Carlos Diaz; González Molina, Begoña; Pardo, Sara; Sánchez, Carlos López; Williams, Monica; Muñoz Corsini, Lourdes; Rodríguez Fraile, José Ramón; de la Lastra, Maria; Sacramento, Monir Kabiri; López Saña, Francisco Javier; Trenado Ålvarez, Josep; Cantón Bulnes, Maria Luisa; Carrasco, Violeta Gándara; Cubillos, Diana Narváez; Seisdedos, Ángel Arenzana; Torres, Bartolomé Fernández; Ampuero, Marian Santos; Llano, Marta Chicot; Munoz, Manuel; Orts, Mar; Planas, Antonio; Ramasco, Fernando; Roman, Carlos; Durán, Marina Varela; del Río Fernandez, Sabela; Sanduende Otero, Yolanda; Lopez Pineiro, Susana; Barreiro Pardal, Cristina; Fernández Alcantud, Jesús; Antolinos, Mercedes Ayuso; Barrios, Francisco; Casanova, Ana Collantes; Castro, Manuel Ruiz; Crespo, Beatriz Infantes; Felipe, Uzuri Lancha; Fuster, Marta Liceras; García, Máximo Sanz; Garrote, Begoña Herrero; Gonzalez, Ricardo Moreno; Granero, Maria José Montes; Lloreda de la Guia, Carlos; López, Raquel Chaves; de Frutos López, Santiago; Martinez, Jose Javier Marco; Mostaza, Angel Garcia; Moreno, Antonio Jiménez; Osado, Irene Riquelme; Pastor, Ana Bardina; Peña, Rosa; Pérez, Mónica Rustarazo; Piña, María Aliaño; Romero, Carlos Aranda; Rodríguez, Elena Rodríguez; Sáez, Vicente Pedroviejo; Safatle, Fernando; Salvan, Javier Hernández; Sampedro, Mar Galán; de la Torre, Patricia Alfaro; Toro, Jonatan Pérez; Unzúe, Crsitina Lasa; Vargas, Maria José; Bernal, David Garcia; Echevarria, Mercedes; Iglesias, Alejandro Ubeda; Loza, Ana; Rodriguez Morillo, Araceli; Serrano, Pedro Diaz; Barrientos Sevilla, Fernando Caba; Cacho, Elena; Calderón, Ricardo; Dufur, Mercedes; Marginet, Carolina; Monedero, Pablo; Yepes, Maria José; Alvarez, Luzdivina Rellán; Carballal, Francisca Fernández; Castiñeiras, Alberto Pensado; García, Paula Dieguez; López, Lorena Ramos; Maceiras, Pablo Rama; Puente, María Socorro Martínez; Rilo, Maria Teresa Rey; Alonso, Esther Trujillo; Fernández, Sonia Rodríguez; García, Rafael Omaña; García, Aníbal Pérez; Puentes, Rafael Bello; Aguado, Domingo Nunez; Carballo, Carlos Lopez; Fernandez, Ricardo Fernandez; Presedo, Amadeo Toledo; de Rabago, Ricardo Bermejo Diaz; Velasco, Ana Rodriguez; Capel, Yolanda Jiménez; Cortés, Ana Fernández; García, Esther Martínez; Gimeno, Laura Martinez; Klamburg, Jordi; Omedas, Rosa Castillo; Núñez, Miriam González; Maristany, Clara Llubià; Ruiz, Enrique Moret; Artigas, Xavier; Castrillón, Sebastian; Espinosa, Nieves; Gomez-Caro, Ana Maria; Illa, Susana; Martín-Huerta, Beatriz; Moreno, Marisa; Fernández, Cristina Iglesias; García, Violeta Fernández; Hernández, Pedro Picatto; Checa, Alberto Honrubia; Diaz, David Salvatierra; Noguera, Manuel Linero; Varela, Ignacio Pujol; Gallego, Miguel A. González; García, Oscar Martínez; Irujo, José Javier Ariño; Perrino, Carlos González; Picazo, Julio Rey; Timoneda, Francisco López; Arroyo, María Manzanero; Blanco, Isabel Albalá; Borja, Marcos Martínez; Burcio, Sara Martín; Castro, Nilda Martinez; Cerdeiriña, Aránzazu Puente; Cristina, Medrano Viñas; Dorado Díaz, Trinidad; Esteruelas, Juan Avellanosa; Ingelmo, Ildefonso Ingelmo; Insuga, Paco Duran; Llamas, Elisabeth Claros; Lopez, Jose Juan Martín; Martín, María Beltran; Martín, Elena Elías; Mesa, Eva Ureta; Monterde, Manuela Loren; Montoiro, Paloma Alonso; Móstoles, Maria Luisa Gonzalez; Olarte, Eva Velasco; Pérez, Adolfo Martínez; Perez, Fernando Domínguez; Romero, Ana Serrano; Rous, Diego Parise; Ruiz, Nuria Mané; Ruiz, Jose Angel Palomo; Saiz, Alvaro Ruigomez; Toha, Angel Candela; Utrera, Fernando Alvarez; Alberdi, Fermín; Elósegui, Itxaso; García, Javier; Garde, Pilar Marco; Mintegui, Escudero Itziar; Sáez, Iker García; Salas, Estibaliz; Camil, Sant; Diaz-Boladeras, Rosa-Maria; Mora-Guevara, Emilio; Zamora, Julia Ferreras; Bonet, Alfons; Salo, Lidia; Salinas, Unai; Zaballos, Juan M.; Alvarez, Ana Abella; Garrido, Carlos Jimenez; Roa, Juan Ramón Hita; Vidal, Federico Gordo; Garcia-Egea, Jorge; Elson, Monica Zamora; Asensio, Miguel Angel Mendiola; Simeón, Rosa Gastaldo; Alameda, Luis Enrique Muñoz; Angulo, Guillermo Oeding; Aranzubia, Monserrat; Arcas, Jose Juan; Arevalo, Julian; Belvert, Belén Quesada; Calvo, César Pérez; Cremades, Marta; Crespo, Pascual; Cuarental, Ana; Fernández, Pablo Turrión; Herrera, Elena; Llorente, Miguel Angel Alcala; Rabes, Cecilia Martin; de Maeyer, Ana Gamo; Marquez, Manuel Pérez; Mendoza, Diego López; Muñoz, José María Milicua; Martínez, Natividad Arias; Ferrandiz, Sergi Tormo; Sanchez-Morcillo, Silvia; Sánchez, Matilde Lafuente; Parra, Asunción Marqués; Vidal, Sonia Gomar; Allué, Raquel Montoiro; Etayo, Begoña Zalba; Rodriguez, Raquel Bustamante; Villen, Luis Martin; Jimenez, Cristina Molla; de Zayas, Ricardo Salas; Moreno, Cristina Dolera; Pacheco, Fernando SanJose; Pascual, Jose Luis Anton; Parla, Infanta Cristina; Gude, Fernando Tejera; Riestra, Eva Manteiga; Delgado, Francisco Cota; de Vilanova, Arnau; Barrios, Javier; García-Sanz, Mercedes; García, Vicente; Sanmiguel, Guillermo; Álvaro, Julian López; Barrachima, Beatriz Bornay; Bermejo, Francisco Jose Romero; Garcia, Alberto Garcia Fernandez Pilar Martinez; Ramírez, Carolina Navarro; Ramos, Jorge Gómez; Samaniego, Luis Angel; Belenguer-Muncharaz, Alberto; Mateu-Campos, Maria-Lidon; Domínguez, David; Espinosa, Elena; León, Teresa; Betancor, Nazario Ojeda; Cortes, Javier Garcia; Díaz, Juan José Díaz; Canalechevarria, Ana Manzano; Novales, Beatriz Fores; Peña, Jose Manuel Garcia; Delgado, Tomas Rodriguez; Roquerio, Beatriz Santamaria; Sainz, Juan Jose Gomez; Soto, Teresa Tebar; Chew, Michelle; Dahm, Peter; Odenstedt Hergès, Helena; Lundborg, Christoffer; Söndergaard, Sören; Rylander, Christian; Sari, Ferenc; Oscarsson Tibblin, Anna; Adolfsson, Anne; Klarin, Bengt; Schrey, Susann; Chew, Michelle S.; Merisson, Edyta; Ryde, Jörgen; Divander, Mona Britt; Hedin, Annika; Hedlund, Daniel; Jawad, Monir; Layous, Lona; Brattström, Olof; Olheden, Staffan; Oldner, Anders; Sellden, Eva; Walder, Bernhard; Wickboldt, Nadine; Rossi, Ariane; Steiner, Luzius; Djurdjevic, Mirjana; Lussmann, Roger; Geisen, Martin; Hofer, Christoph; Turina, Matthias; Grocott, Mike; Goldhill, David; Everett, Lynn; Harris, Katy; Wright, Maggie; Adams, David; Alderson, Lorraine; Baker, Julie; Christie, Iain; Ferguson, Colin; Hill, Matthew; Holmes, Kate; Hutton, Andrew; Minto, Gary; Moor, Paul; Porter, Andrew; Struthers, Richard; Akotia, Niven; Belhaj, Alaa; Chang, Serene; Collantes, Enrique; Eigener, Katrin; Husband, Michael; Khan, Ahsun; McAlees, Eleanor Jane; MacDonald, Neil; Niebrzegowska, Edyta; Parnell, Wendy; Smith, Amanda; Chhatwal, Ally; Jhingan, Smriti; Muswell, Richard; Poon, Yoyo; Singh, Nidhita; Stephens, Robert; Vasan, Robin; Waife, Nicola; Weda, Tahmina; Clarke, Adrian; Szakmany, Tamas; Fletcher, Simon; Rosbergen, Melissa; Prince, Liz; Wong, Kate; Kumar, Ram; Stilwell, Sarah; Couper, Keith; Crooks, Neil; Gao-Smith, Fang; Melody, Teresa; Snaith, Catherine; Patel, Jaimin; Parekh, Dhruv; Yeung, Joyce; Loughnan, Bernadette; Rope, Tamsin; Dawson, Julie; Hadfield, Daniel; Hopkins, Phil; McDonald, Lisa; Willars, Chris; Campbell, Gillian; Craig, Jayne; Smith, Andrew; Ladipo, Karleen; Lockwood, Geoff; Moreno, Juan; Ballington, Ruth; Hamandishe, Sibongilele; Rogerson, David; Cowman, Sarah; Hayden, Paul; Pinto, Nuno; Arawwawala, Dilshan; Brotherston, Lauren; Mitchell-Inwang, Christine; Walsh, Helena; Alagarsamy, Famila; Goon, Serena; Karcheva, Sylvia; Krepska, Amy; McKinney, Brian; Patil, Vishal; Devon, Royal; Batchelor, Nicholas; Finch, Louise; Gibson, Charlie; Grayling, Matthew; Hubble, Sheena; Key, William; Knight, Thomas; Loosley, Alexander; Margetts, Paul; Stewart, Hannah; Bewley, Jeremy; Hurley, Katrina; Murphy, Ruth; Philpott, Catherine; Pollock, Kathryn; Sweet, Katie; Thomas, Matthew; Tucker, Katy; Windsor, David; Conway, Daniel; Gold, Steve; Quraishi, Tanviha; Cupitt, Jason; Baddeley, Sally; Brown, John David; Mantle, Damien; Carvalho, Peter; Huddart, Sam; Kirk-Bayley, Justin; Smith, Rebecca-Lea; Milligan, Lisa; Poulose, Sonia; Sarkar, Som; Nolan, Jerry; Pedley, Emma; Padkin, Andrew; Pesian, Siamak; Rajamanickam, Satish; Ramkumar, Konnur; Thomas, Jerry; Crayford, Alison; Turner, Angus; Bottrill, Fiona; Webb, Stephen; Jhanji, Shaman; MacCallum, Niall; Wessels, Kate; Wigmore, Tim; Meikle, Alistair; Wilson, Stephen; White, Stuart; Bonnett, Andrew; Rushton, Andrew; Williams, Colin; Zuzan, Oliver; Hall, Andrew; Montgomery, Jane; Piggot, Ailie; Read, Richard; Stocker, Mary; Tamm, Tiina; Agarwal, Banwari; Ward, Stephen; Brown, Lucy; Joy, Manju; Venkatesh, Suresh; Hughes, Thomas; Zsisku, Lajos; Roy, Alistair; Hooper, Victoria; Mouland, Johanna; Nightingale, Jeremy; Rose, Steve; Chiam, Patrick; Chohan, Harnita; Dickson, Chris; Gibb, Sarah; Higham, Charley; Harvey, Caroline; Janarthanan, Chandra; Jones, Laura; Kapoor, Avinash; Moll, Mark; Roberts, Louise; Saunders, David; Arnold, Glenn; Gibbs, Claire; Jhurgursing, Mhairi; Pritchard, Frances; Doyle, Patrick; Templeton, Maie; Wilson, Robert; Zantua, Kim; Collyer, Thomas; Featherstone, James; Worton, Rachael; Bruce, Jean; McGuigan, Kate; Moreton, Sarah; Pulletz, Mark; Anderson, Helen; Baxter, Ian; Beckingsale, Alex; Callaghan, Mark; Datta, Ansu; Dawson, Jo; Gollogly, Jackit; Izod, Chris; Lobaz, Steve; MacFie, Caroline; Patel, Manju; Payne, Heather; Singh, Raj; Timms, Gemma; McLeod, Shaun; O'Brian, Peter; Horner, Elspeth; Joshi, Vivekananda; Stuart-Smith, Karen; Seale, Tania; Bolger, Clare; Collins, Hannah; Ekins, Emma; Golder, Kim; Hawkins, Lesley; Jonas, Max; Linford, Karen; Wadams, Beverley; Vizcaychipi, Marcela; Jewsbury, William; Davies, Simon; Kangaraj, Muthuraj; Pissay, Nagesh; Smith, Neil; Gopalakrishnan, Senthilkumar; MacKinnon, John; Strandvik, Gustav; Francis, Ruth; Jennings, Adrian; Keating, Matthew; Kumar, Sajith; Leese, Sarah; Magee, Cliona; Pilsbury, Jane; Ralph, James; Riddington, David; Sachdeva, Rajneesh; Snelson, Catherine; Vasanth, Suresh; Wilde, Judith; Lavender, Beth; Lyons, Rachel; Watters, Malcolm; Adams, Tim; Dyer, Simon; Tindall, Lucy; Claxton, Andrew; Netke, Meenu; Princess, Diana; Akouds, Esam; Bates, Debrah; Gallagher, Heather; Hatton, Jonathan; Holroyd, William; Mitra, Atideb; Nurse, Trudy; Reed, Deborah; Barber, Russell; Childs, Sophie; O'Carroll-Kuehn, Britta; Wyldbore, Mark; Al-Abdaly, Ayad; Amatya, Suman; Bhaskaran, Sherly; Chandan, Garud; Chaudhry, Suman; Chikungwa, Moses; Earnshaw, Greg; Grewal, Moni; Haque, Shamimul; Hawkins, John; Javaid, Ahmed; Jackson, Clare; Kamel, Miriam; Marla, Ruchira; Mculloch, Dori-Ann; Parker, Tom; Salib, Yussof; Saravanmuthu, Ramesh; Secker, Chris; Sockalingam, Siva; Taylor, Anne; Austine, Pauline; Kanade, Vrushali; Paal, Dora; Mok, Sam; Burtenshaw, Andrew; Davis, Laura; Ellahee, Parvez; Freeman, David; Pierson, Richard; Wollaston, Julie; Karmarkar, Amara; Ball, Clare; Calton, Emily; Maxwell, Louise; Walker, Rachel; Bland, Martin; Bullock, Lynne; Harrison-Briggs, Donna; Hodge, Paul; Krige, Anton; Dempsey, Ged; Hammell, Claire; Loveridge, Robert; Parker, Robert; Snell, Jane; Wright, Carl; Baker, Andy; Barr, Katharine; Belcher, Alex; Bonnington, Sam; Bougeard, Anne-Marie; Fitzgerald, Emma; Ford, Rachael; Gillard, Chantal; Griffiths, Liz; Greenberg, Lizzie; Huber, Jonathan; Mathieu, Steve; Richardson, Neil; Tompsett, Laura; White, Nigel; Patel, Santosh; Thomas, Richard; Wilson, Jennifer; Copley, Ed; Flutter, Laura; Hulme, Jonathan; Susarla, Jay; Thwaites, Alison; Infirmary, Albert Edward; Jayasundera, Suraj; McAfee, Sean; Chantler, Jonathan; McKechnie, Stuart; Neely, Julia; Mouton, Ronelle; Scarth, Edward; Buss, Joanne; Currie, Vicki; Sange, Mansoor; Kuttler, Anja; Power, Fiona; Alexander, David; Dunne, Kevin; Shinner, Guy; Black, Euan; Haldane, Grant; Kerr, Jennie; Saran, Taj; Ward, Geraldine; Jefferies, Fiona; Alexander, Peter; Royle, Alison; Nahla, Farid; Bowles, Tim; Gregory, Maggie; Ahern, Rebecca; Cartlidge, David; Craker, Lloyd; Thompson, Christopher; Bidd, Heena; Giles, Julian; Manser, Amanda; Parry, Gareth; Chan, Peter; Das, Dinesh; Fahmy, Nisreen; Higgins, David; Khader, Ahamed Abdul; Stone, Alex; Leonardi, Silvia; Rose, Oliver; Ercole, Ari; Rafi, Muhammed Amir; Ramasamy, Radhika; Sheshgiri, Bengeri; Merrill, Colin; Page, Valerie; Walker, Elaine; Harris, Stephen; Hughes, Sarah; Morrison, Alan; Razouk, Khaled; Ayman, Mustafa; al-Subaie, Nawaf; Arif, Fuhazia; Cashman, Jeremy; Cecconi, Maurizio; Edsell, Mark; Fossati, Nicoletta; Hammond, Sarah Jane; Hamilton, Mark; Lonsdale, Dagan; Moran, Carl; Siegmueller, Claas; Velzeboer, Freya; Wong, Patrick; Jakeman, Alicia; Mowatt, Chris; Tsakas, Pirros; Clouva-Molyvdas, Phyllis-Maria; Nyktari, Vasileia; Malliotakis, Polychronis; Bekos, Vasileios; Molnar, Tamas; Karason, Sigurbergur; Blondal, Asbjorn; Di Mauro, Piero; Tommasino, Concezione; Zandvliet, Ria; in't Veld, Bas A.; Reidinga, Auke C.; Dagfinn Boksasp, Ola; Kostryka, Wlodzimierz; Choma, Robert; de Sousa Pereira de Freitas, Ana Claudia; de la Quintana Gordon, Borja; Serra, Sofia; Goncalves Castro, Maria de Lurdes; Botas, Concecao; Maldovan, Ion; Rely, Manolescu; Sandesc, Dorel; Copotoiu, Sanda-Maria; Obradovic, Jovana; Zahorec, Roman; Stecher, Adela; Stivan, Feri; Vallejo, Ana; Mas Serra, Arantxa; Real Navacerrada, Isabel; Pastor Martinez, Ernesto; Camps Cervantes, Angel; de Nadal Clanchet, Miriam; Zaldibar, Estibaliz; Miguez Crespo, Maria del Rocio; Laza Laza, Enrique; Heredia Perez, Maria del Pino; India, Inmaculada; Moral, Victoria; Concostrina, Maria de la Torre; de la Vega Terol, Alvaro; Zabarte, Mercedes; Seron-Arbeloa, Carlos; del Olmo, Mercedes; Franqueza Garcia Isabel Garcia Vega, Jose Luis; Santos Oveido, Arnoldo; Inigo, Jose Alonso; de la Torre Prados, Maria Victoria; Ferrandiz-Selles, Amparo; Seeman-Lodding, Helene; Ryde'n, Jorgen; Wernerman, Jan; Bjorne, Hakan; Kong, Ming-Li; Blunt, Mark; Moosajee, Vas; Edger, Lliam; Sandhar, Taj; Day, Christopher; Foo, Irwin; Pierro, Dena; Price, Grant; Desikan, Somi; Mok, May Un Sam; Trodd, Dawn; Soar, Jasmeet; Bright, Elizabeth

    2015-01-01

    BACKGROUND Evidence suggests that sleep deprivation associated with night-time working may adversely affect performance resulting in a reduction in the safety of surgery and anaesthesia. OBJECTIVE Our primary objective was to evaluate an association between nonelective night-time surgery and

  18. [Stress and night eating syndrome: a comparison study between a sample of psychiatric outpatients and healthy subjects].

    Science.gov (United States)

    Pacitti, Francesca; Maraone, Annalisa; Zazzara, Francesca; Biondi, Massimo; Caredda, Maria

    2011-01-01

    The Night Eating Syndrome (NES) is a disorder characterized by the clinical features of morning anorexia, evening hyperphagia, and insomnia with awakenings followed by nocturnal food ingestion. The core clinical feature appears to be a delay in the circadian timing of food intake. The diagnosis and early treatment of NES may represent an important means of prevention for obesity. Aims. The aim of the present study was to determine the vulnerability to develop NES between a clinical sample of patients with psychiatric disorders and a non clinical sample. We investigated a possible relation between stress and a dysfunctional eating behaviors as NES. Methods. The Night Eating Questionnaire (NEQ) has been administered to 147 psychiatric outpatients and to 531 subjects attending the University of L'Aquila. The NEQ is a questionnaire used to evaluate the prevalence of NES. The sample has been also evaluated through the Stress-related Vulnerability Scale (SVS) to measure both perceived stress and social support. Results. The 8.2% of patients scored above the diagnostic cut-off of the NEQ, compared to the 2.1% in the sample of healthy subjects. The majority of patients who had shown NEQ>25 had a diagnosis of major depressive disorder (MDD). The total scores on the NEQ were strongly associated with the SVS total score and especially with the "lack of social support" subscale. Conclusions. This study shows the increased vulnerability of NES in the sample of psychiatric patients compared to the sample of healthy subjects. The study further confirms the strong association between perceived stress, social support, altered eating behaviors and obesity.

  19. Study on spatial-temporal change of Changsha-Zhuzhou-Xiangtan urban agglomeration based on DMSP / OLS night light data

    Science.gov (United States)

    Li, Mao; Li, Lel-in

    2018-03-01

    For the sake of curbing the spreading of Changsha-Zhuzhou-Xiangtan urban agglomeration and spatial disorder in the process of urbanization development on the regional bearing capacity of land resources and ecological environment and assisting to plan the integration process of ChangZhuTan,this paper uses the DMSP/OLS night light data of Chang ZhuTan in 1992 to 2013 to invert the urbanization process index of ChangZhuTan urban agglomeration. Based on the two scales of time and space, this paper analyzes the average index of lights, the speed of urban expansion and urban compactness index et al and studies the temporal and spatial characteristics of ChangZhuTan urban agglomeration in this period.

  20. The effects of nighttime napping on sleep, sleep inertia, and performance during simulated 16 h night work: a pilot study.

    Science.gov (United States)

    Oriyama, Sanae; Miyakoshi, Yukiko

    2018-03-27

    This study aimed to elucidate the effects of two naps taken at night on morning waking state and performance. The participants were 12 women. The experiment was performed in a laboratory over 2 days (16:00-09:00). In this crossover comparative study, three experimental nap conditions were used (naps from 22:30 to 00:00 and from 02:30 to 03:00 (22:30-NAP), 00:30 to 02:00 and 04:30 to 05:00 (00:30-NAP), and no naps (NO-NAP), respectively). Measurement items were a Visual Analog Scale for sleepiness and fatigue, the Psychomotor Vigilance Test (PVT), and single-digit addition calculations (10 min) every hour for 18 h from 16:00 to 09:00, excluding nap times. Sleep inertia and sleepiness were noted directly after napping. Less sleepiness and fatigue were noted in the nap groups between 06:00 and 09:00 in the morning than in the NO-NAP condition and PVT response times were faster. Since participants in the nap groups were able to conduct more single-digit addition calculations, the performance of these groups appeared to be superior to that of the NO-NAP condition. Furthermore, the performance of calculations was significantly better in the 00:30-NAP than in the 22:30-NAP. Taking two naps during a simulated night shift helps improve sleepiness and fatigue and maintain performance. Taking a nap in the early morning appears to be promising for improving the waking state.

  1. Late-night-dinner is associated with poor glycemic control in people with type 2 diabetes: The KAMOGAWA-DM cohort study.

    Science.gov (United States)

    Sakai, Ryosuke; Hashimoto, Yoshitaka; Ushigome, Emi; Miki, Akane; Okamura, Takuro; Matsugasumi, Masako; Fukuda, Takuya; Majima, Saori; Matsumoto, Shinobu; Senmaru, Takafumi; Hamaguchi, Masahide; Tanaka, Muhei; Asano, Mai; Yamazaki, Masahiro; Oda, Yohei; Fukui, Michiaki

    2018-04-26

    Skipping breakfast or irregular breakfast is associated with poor glycemic control. However, a relationship between the timing of dinner and glycemic control in people with type 2 diabetes remains indefinite. Therefore, we investigated the relationship between late-night-dinner and glycemic control in people with type 2 diabetes. We performed questionnaire survey for lifestyle factors in this cross-sectional study. We defined having dinner later than eight pm as late-night-dinner. We examined the differences in clinical and metabolic parameters between those who have late-night-dinner and those who do not have. We also examined the relationship between late-night-dinner and HbA1c, using multiple regression analysis. Ninety-five people (23.2%) had a late-night-dinner, among 409 people with type 2 diabetes. Metabolic parameters (mean (SD) or median (interquartile range)) of people with late-night-dinner were worse than those of without, including body mass index (BMI) (24.4 (4.0) vs. 23.2 (3.4) kg/m 2 , p = 0.006), triglycerides (1.5 (1.1-2.1) vs. 1.2 (0.8-1.7) mmol/L, p dinner (standardized regression coefficient = 0.13, p = 0.028) was associated with hemoglobin A1c after adjusting for age, BMI, sex, duration of diabetes, smoking, exercise, alcohol, snacking after dinner, nighttime sleep duration, time from dinner to bedtime, skipping breakfast, and medication for diabetes. Late-night-dinner is independently associated with poor glycemic control in people with type 2 diabetes.

  2. Night shift work and modifiable lifestyle factors.

    Science.gov (United States)

    Pepłońska, Beata; Burdelak, Weronika; Krysicka, Jolanta; Bukowska, Agnieszka; Marcinkiewicz, Andrzej; Sobala, Wojciech; Klimecka-Muszyńska, Dorota; Rybacki, Marcin

    2014-10-01

    Night shift work has been linked to some chronic diseases. Modification of lifestyle by night work may partially contribute to the development of these diseases, nevertheless, so far epidemiological evidence is limited. The aim of the study was to explore association between night shift work and lifestyle factors using data from a cross-sectional study among blue-collar workers employed in industrial plants in Łódź, Poland. The anonymous questionnaire was self-administered among 605 employees (236 women and 369 men, aged 35 or more) - 434 individuals currently working night shifts. Distribution of the selected lifestyle related factors such as smoking, alcohol drinking, physical activity, body mass index (BMI), number of main meals and the hour of the last meal was compared between current, former, and never night shift workers. Adjusted ORs or predicted means were calculated, as a measure of the associations between night shift work and lifestyle factors, with age, marital status and education included in the models as covariates. Recreational inactivity (defined here as less than one hour per week of recreational physical activity) was associated with current night shift work when compared to never night shift workers (OR = 2.43, 95% CI: 1.13-5.22) among men. Alcohol abstinence and later time of the last meal was associated with night shift work among women. Statistically significant positive relationship between night shift work duration and BMI was observed among men (p = 0.029). This study confirms previous studies reporting lower exercising among night shift workers and tendency to increase body weight. This finding provides important public health implication for the prevention of chronic diseases among night shift workers. Initiatives promoting physical activity addressed in particular to the night shift workers are recommended.

  3. Night shift work and modifiable lifestyle factors

    Directory of Open Access Journals (Sweden)

    Beata Pepłońska

    2014-10-01

    Full Text Available Objectives: Night shift work has been linked to some chronic diseases. Modification of lifestyle by night work may partially contribute to the development of these diseases, nevertheless, so far epidemiological evidence is limited. The aim of the study was to explore association between night shift work and lifestyle factors using data from a cross-sectional study among blue-collar workers employed in industrial plants in Łódź, Poland. Material and Methods: The anonymous questionnaire was self-administered among 605 employees (236 women and 369 men, aged 35 or more - 434 individuals currently wor­king night shifts. Distribution of the selected lifestyle related factors such as smoking, alcohol drinking, physical activity, body mass index (BMI, number of main meals and the hour of the last meal was compared between current, former, and never night shift workers. Adjusted ORs or predicted means were calculated, as a measure of the associations between night shift work and lifestyle factors, with age, marital status and education included in the models as covariates. Results: Recreational inactivity (defined here as less than one hour per week of recreational physical activity was associated with current night shift work when compared to never night shift workers (OR = 2.43, 95% CI: 1.13-5.22 among men. Alcohol abstinence and later time of the last meal was associated with night shift work among women. Statistically significant positive relationship between night shift work duration and BMI was observed among men (p = 0.029. Conclusions: This study confirms previous studies reporting lower exercising among night shift workers and tendency to increase body weight. This finding provides important public health implication for the prevention of chronic diseases among night shift workers. Initiatives promoting physical activity addressed in particular to the night shift workers are recommended.

  4. Late-night overeating is associated with smaller breakfast, breakfast skipping, and obesity in children: The Healthy Growth Study.

    Science.gov (United States)

    Karatzi, Kalliopi; Moschonis, George; Choupi, Eurikleia; Manios, Yannis

    2017-01-01

    Excessive energy intake during evening hours is associated with several health problems. The aim of this study was to investigate for the first time the possible association of late-night overeating with breakfast habits and obesity in a large sample of Greek children ages 9 to 13 y. In all, 2655 schoolchildren (9-13 y) participated in the Healthy Growth Study, a cross-sectional epidemiologic study conducted in 77 primary schools in four large regions in Greece. The present study presents results on 1912 children having full data regarding anthropometric, dietary, physical activity, and physical examination indices. High-energy intake at dinner and evening snack was associated with higher likelihood of skipping breakfast (odds ratio, 1.85; 95% confidence interval 1.42-2.39) and with lower caloric intake at breakfast (β = 0.14; P overeating is associated with skipping and/or consuming a smaller breakfast. In children with low levels of physical activity, it is associated with increased body mass index. Future relevant studies are essential to further explore and confirm the findings of the present study. Copyright © 2016 Elsevier Inc. All rights reserved.

  5. Night Terrors in Children

    OpenAIRE

    Feferman, Irv

    1988-01-01

    Night terrors are a bizarre sleep disorder that affects young children. The child partially awakes during the night agitated, afraid and terrified, and cannot be consoled. These events, which may be related to emotional turmoil, are self-limiting. Psychiatric evaluation is indicated in certain cases, and drug therapy is almost never necessary. Parents should be reassured that night terrors are not dangerous and do not reflect any serious pathology.

  6. Day vs. day-night use of ankle-foot orthoses in young children with spastic diplegia: a randomized controlled study.

    Science.gov (United States)

    Zhao, Xiaoke; Xiao, Nong; Li, Hongying; Du, Senjie

    2013-10-01

    The aim of this study was to compare the effectiveness of treatment with hinged ankle-foot orthoses (AFOs) during the day vs. during both the day and the night in young ambulant children with spastic diplegia. In this prospective randomized controlled trial, 112 ambulatory children (70 boys and 42 girls; mean age, 2 yrs 6.93 mos; range, 1 yr 1 mo to 4 yrs 0 mo) with spastic diplegia participated. Forty-eight were classified at level I of the Gross Motor Function Classification System; the remaining 64 were at level II. Using stratified randomization, all children were assigned to either the day AFO-wearing group (n = 56, wearing AFOs all day) or the day-night AFO-wearing group (n = 56, wearing AFOs all day and all night). The two groups underwent conventional rehabilitative treatments five times a week for 8 wks. The primary outcomes measured were passive ankle dorsiflexion angle and sections D and E of the 66-item Gross Motor Function Measure; the root mean square of surface electromyography in the ventral and dorsal lower limb muscles was compared in a subgroup (ten from each group). Seven children did not complete the full intervention: three in the day AFO-wearing group and four in the day-night AFO-wearing group. Significant baseline-postintervention improvements were found for passive ankle dorsiflexion angle and the 66-item Gross Motor Function Measure in both groups (P day AFO-wearing group (P day AFO-wearing group, whereas the muscles affected in the day-night AFO-wearing group were the gastrocnemius (P day-night use. In addition, the prolonged wearing of AFOs may influence muscle activity, which should be monitored in the clinic.

  7. 112 A Linguistic Stylistic Study of Wole Soyinka's Night and Death in ...

    African Journals Online (AJOL)

    data collected from a selection of deviant words and structures in the poems. ... concept has no single accurate definition and as such is defined ... Later on, focus moved from the study of the author's style to how ..... (DD, stanza 3, line 25).

  8. Night airglow in RGB mode

    Directory of Open Access Journals (Sweden)

    Mikhalev А.V.

    2016-09-01

    Full Text Available To study dynamics of the upper atmosphere, we consider results of the night sky photometry, using a color CCD camera and taking into account the night airglow and features of its spectral composition. We use night airglow observations for 2010–2015, which have been obtained at the ISTP SB RAS Geophysical Observatory (52° N, 103° E by the camera with KODAK KAI-11002 CCD sensor. We estimate average brightness of the night sky in R, G, B channels of the color camera for eastern Siberia with typical values ranging from ~0.008 to 0.01 erg·cm–2·s–1. Besides, we determine seasonal variations in the night sky luminosities in R, G, B channels of the color camera. In these channels, luminosities decrease in spring, increase in autumn, and have a pronounced summer maximum, which can be explained by scattered light and is associated with the location of the Geophysical Observatory. We consider geophysical phenomena with their optical effects in R, G, B channels of the color camera. For some geophysical phenomena (geomagnetic storms, sudden stratospheric warmings, we demonstrate the possibility of quantitative relationship between enhanced signals in R and G channels and increases in intensities of discrete 557.7 and 630 nm emissions, which are predominant in the airglow spectrum

  9. Building Student Understanding of the Cause of Day and Night: A Study of Literacy- and Spatial Thinking-Integrated Activities Compared to a Commercial Curriculum

    Science.gov (United States)

    Rule, Audrey C.; Webb, Angela Naomi

    2015-01-01

    The cause of day and night is a difficult concept to master without concrete foundational skills of understanding shadows, rotation, changing point of view, and relative positions of objects in the sky. This pretest-posttest experimental-control group study examined student learning in a science-literacy-spatial skills integrated unit with…

  10. Visual Attention to Pictorial Food Stimuli in Individuals With Night Eating Syndrome: An Eye-Tracking Study.

    Science.gov (United States)

    Baldofski, Sabrina; Lüthold, Patrick; Sperling, Ingmar; Hilbert, Anja

    2018-03-01

    Night eating syndrome (NES) is characterized by excessive evening and/or nocturnal eating episodes. Studies indicate an attentional bias towards food in other eating disorders. For NES, however, evidence of attentional food processing is lacking. Attention towards food and non-food stimuli was compared using eye-tracking in 19 participants with NES and 19 matched controls without eating disorders during a free exploration paradigm and a visual search task. In the free exploration paradigm, groups did not differ in initial fixation position or gaze duration. However, a significant orienting bias to food compared to non-food was found within the NES group, but not in controls. A significant attentional maintenance bias to non-food compared to food was found in both groups. Detection times did not differ between groups in the search task. Only in NES, attention to and faster detection of non-food stimuli were related to higher BMI and more evening eating episodes. The results might indicate an attentional approach-avoidance pattern towards food in NES. However, further studies should clarify the implications of attentional mechanisms for the etiology and maintenance of NES. Copyright © 2017. Published by Elsevier Ltd.

  11. Studying the Night Shift: A Multi-method Analysis of Overnight Academic Library Users

    Directory of Open Access Journals (Sweden)

    David Schwieder

    2017-09-01

    Full Text Available Abstract Objective – This paper reports on a study which assessed the preferences and behaviors of overnight library users at a major state university. The findings were used to guide the design and improvement of overnight library resources and services, and the selection of a future overnight library site. Methods – A multi-method design used descriptive and correlational statistics to analyze data produced by a multi-sample survey of overnight library users. These statistical methods included rankings, percentages, and multiple regression. Results – Results showed a strong consistency across statistical methods and samples. Overnight library users consistently prioritized facilities like power outlets for electronic devices, and group and quiet study spaces, and placed far less emphasis on assistance from library staff. Conclusions – By employing more advanced statistical and sampling procedures than had been found in previous research, this paper strengthens the validity of findings on overnight user preferences and behaviors. The multi-method research design can also serve to guide future work in this area.

  12. Simulation Study of Discharging PCM Ceiling Panels through Night - time Radiative Cooling

    DEFF Research Database (Denmark)

    Bourdakis, Eleftherios; Kazanci, Ongun Berk; Grossule, F.

    2016-01-01

    demand. In the present simulation study, the coupling of nighttime radiative cooling with PCM for cooling an office room was investigated. For cooling water through nighttime radiative cooling two types of solar panels were utilized, an unglazed solar collector and photovoltaic/thermal (PV/T) panels...... provided by the PV/T panels was 43 W/m2 for Copenhagen, while for Milan and Athens it was 36 W/m2 and 34 W/m2, respectively. The cooling power of the unglazed solar collector was negligible. Finally, the total electricity produced in Copenhagen for the simulated period was 371 kWh, while for Milan...... and increase use of renewable energy sources. The aim is that by 2020 all new buildings should be nearly zero-energy buildings. A solution that could contribute to this is the combination of photovoltaic panels for the production of electricity and phase change material (PCM) for the reduction of peak cooling...

  13. Living with a symptomatic rotator cuff tear 'bad days, bad nights': a qualitative study.

    Science.gov (United States)

    Minns Lowe, Catherine J; Moser, Jane; Barker, Karen

    2014-07-09

    Rotator cuff tears are a common cause of shoulder pain. There is an absence of information about symptomatic rotator cuffs from the patients' perspective; this limits the information clinicians can share with patients and the information that patients can access via sources such as the internet. This study describes the experiences of people with a symptomatic rotator cuff, their symptoms, the impact upon their daily lives and the coping strategies utilised by study participants. An interpretive phenomenological analysis approach was used. 20 participants of the UKUFF trial (The United Kingdom Rotator Cuff Surgery Trial) agreed to participate in in-depth semi-structured interviews about their experiences about living with a symptomatic rotator cuff tear. Interviews were digitally recorded and fully transcribed. Field notes, memos and a reflexive diary were used. Data was coded in accordance with interpretive phenomenological analysis. Peer review, code-recode audits and constant comparison of data, codes and categories occurred throughout. The majority of patients described intense pain and severely disturbed sleep. Limited movement and reduced muscle strength were described by some participants. The predominantly adverse impact that a symptomatic rotator cuff tear had upon activities of daily living, leisure activities and occupation was described. The emotional and financial impact and impact upon caring roles were detailed. Coping strategies included attempting to carry on as normally as possible, accepting their condition, using their other arm, using analgesics, aids and adaptions. Clinicians need to appreciate and understand the intensity and shocking nature of pain that may be experienced by participants with known rotator cuff tears and understand the detrimental impact tears can have upon all areas of patient's lives. Clinicians also need to be aware of the potential emotional impact caused by cuff tears and to ensure that patients needing help for

  14. A comparative study of night-time enhancement of TEC at a low latitude station on storm and quiet nights including the local time, seasonal and solar activity dependence

    Directory of Open Access Journals (Sweden)

    K. Unnikrishnan

    Full Text Available The main characteristics of night-time enhancements in TEC during magnetic storms are compared with those during quiet nights for different seasons and solar activity conditions at Palehua, a low latitude station during the period 1980–1989. We find that the mean amplitude has both a seasonal and solar activity dependence: in winter, the values are higher for weak storms as compared to those during quiet nights and increase with an increase in solar activity. In summer, the mean amplitude values during weak storms and quiet nights are almost equal. But during equinox, the mean amplitude values for quiet nights are greater than those during weak storms. The mean half-amplitude duration is higher during weak storms as compared to that during quiet nights in summer. However, during winter and equinox, the durations are almost equal for both quiet and weak storm nights. For the mean half-amplitude duration, the quiet night values for all the seasons and equinoctial weak storm values increase with an increase in solar activity. The occurrence frequency (in percent of TEC enhancement during weak storms is greater than during quiet nights for all seasons. The mean amplitude, the mean half-amplitude duration and the occurrence frequency (in percent of TEC enhancement values are higher during major storms as compared to those during quiet nights. The above parameters have their highest values during pre-midnight hours. From the data analysed, this behaviour is true in the case of major storms also.

    Key words. Ionosphere (ionospheric disturbances; plasma convection Magnetospheric physics (storms and substorms

  15. Study on the improvement of working environment at night in maintenance works at nuclear power plants

    International Nuclear Information System (INIS)

    Hiramoto, Mitsuru; Kotani, Fumio

    2000-01-01

    At the maintenance work site in nuclear power plants, due to the shortening (reduction of a regular inspection period) of the regular inspection period, the tendency toward working on around-the-clock basis has increased; thus, nighttime work is on the rise. Based upon research both locally and internationally, as well as examples of measures against such a tendency and the results of on-site surveys of the environment surrounding maintenance works at nuclear power plants, the author comprehensively studied the effects of nighttime work on workers, the measures to cope with the situation, and how a working environment for nighttime work should be. Based on the results, the authors made a guidebook for nighttime maintenance work at nuclear power plants. This guidebook, which deals with the subject of nighttime maintenance work at nuclear power plants, is quite unique in the world. It is expected that by using this guidebook, the quality of nighttime maintenance work and the levels of techniques/skills would be enhanced and maintained, and the safety of workers would be ensured, promoting considerably thus the establishment of a comfortable workplace. (author)

  16. Study on the improvement of working environment at night in maintenance works at nuclear power plants

    Energy Technology Data Exchange (ETDEWEB)

    Hiramoto, Mitsuru; Kotani, Fumio [Institute of Nuclear Safety System Inc., Seika, Kyoto (Japan)

    2000-09-01

    At the maintenance work site in nuclear power plants, due to the shortening (reduction of a regular inspection period) of the regular inspection period, the tendency toward working on around-the-clock basis has increased; thus, nighttime work is on the rise. Based upon research both locally and internationally, as well as examples of measures against such a tendency and the results of on-site surveys of the environment surrounding maintenance works at nuclear power plants, the author comprehensively studied the effects of nighttime work on workers, the measures to cope with the situation, and how a working environment for nighttime work should be. Based on the results, the authors made a guidebook for nighttime maintenance work at nuclear power plants. This guidebook, which deals with the subject of nighttime maintenance work at nuclear power plants, is quite unique in the world. It is expected that by using this guidebook, the quality of nighttime maintenance work and the levels of techniques/skills would be enhanced and maintained, and the safety of workers would be ensured, promoting considerably thus the establishment of a comfortable workplace. (author)

  17. Oxidative DNA damage during night shift work.

    Science.gov (United States)

    Bhatti, Parveen; Mirick, Dana K; Randolph, Timothy W; Gong, Jicheng; Buchanan, Diana Taibi; Zhang, Junfeng Jim; Davis, Scott

    2017-09-01

    We previously reported that compared with night sleep, day sleep among shift workers was associated with reduced urinary excretion of 8-hydroxydeoxyguanosine (8-OH-dG), potentially reflecting a reduced ability to repair 8-OH-dG lesions in DNA. We identified the absence of melatonin during day sleep as the likely causative factor. We now investigate whether night work is also associated with reduced urinary excretion of 8-OH-dG. For this cross-sectional study, 50 shift workers with the largest negative differences in night work versus night sleep circulating melatonin levels (measured as 6-sulfatoxymelatonin in urine) were selected from among the 223 shift workers included in our previous study. 8-OH-dG concentrations were measured in stored urine samples using high performance liquid chromatography with electrochemical detection. Mixed effects models were used to compare night work versus night sleep 8-OH-dG levels. Circulating melatonin levels during night work (mean=17.1 ng/mg creatinine/mg creatinine) were much lower than during night sleep (mean=51.7 ng/mg creatinine). In adjusted analyses, average urinary 8-OH-dG levels during the night work period were only 20% of those observed during the night sleep period (95% CI 10% to 30%; psleep, is associated with reduced repair of 8-OH-dG lesions in DNA and that the effect is likely driven by melatonin suppression occurring during night work relative to night sleep. If confirmed, future studies should evaluate melatonin supplementation as a means to restore oxidative DNA damage repair capacity among shift workers. © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.

  18. Long-term exposure to wind turbine noise at night and risk for diabetes: A nationwide cohort study

    DEFF Research Database (Denmark)

    Poulsen, Aslak Harbo; Raaschou-Nielsen, Ole; Pena Diaz, Alfredo

    2018-01-01

    Focus on renewable energy sources and reduced unit costs has led to increased number of wind turbines (WTs). WT noise (WTN) is reported to be highly annoying at levels from 30 to 35 dB and up, whereas for traffic noise people report to be highly annoyed from 40 to 45 dB and up. This has raised...... from a WT. Using detailed data on WT type and hourly wind data at each WT position and height, we estimated hourly outdoor and low frequency indoor WTN for all dwellings, aggregated as nighttime 1- and 5-year running means. Using nationwide registries, we identified a study population of 614......,731 persons living in these dwellings in the period from 1996 to 2012, of whom 25,148 developed diabetes. Data were analysed using Poisson regression with adjustment for individual and area-levels covariates. We found no associations between long-term exposure to WTN during night and diabetes risk...

  19. Klokwerk + study protocol: An observational study to the effects of night-shift work on body weight and infection susceptibility and the mechanisms underlying these health effects.

    Science.gov (United States)

    Loef, Bette; van Baarle, Debbie; van der Beek, Allard J; van Kerkhof, Linda W; van de Langenberg, Daniëlla; Proper, Karin I

    2016-08-02

    Night-shift work may cause severe disturbances in the worker's circadian rhythm, which has been associated with the onset of health problems and diseases. As a substantial part of the workforce is exposed to night-shift work, harmful aspects of night-shift work should not be overlooked. The aim of the Klokwerk + study is to study the effects of night-shift work on body weight and infection susceptibility and the mechanisms underlying these health effects. First, we will study the relation between night-shift work exposure and body weight and between night-shift work exposure and infection susceptibility. Second, we will examine the mechanisms linking night-shift work exposure to body weight and infection susceptibility, with a specific focus on sleep, physical activity, diet, light exposure, vitamin D level, and immunological factors. Lastly, we will focus on the identification of biomarkers for chronic circadian disturbance associated with night-shift work. The design of this study is a prospective observational cohort study consisting of 1,960 health care workers aged 18-65 years. The study population will consist of a group of night-shift workers and an equally sized group of non-night-shift workers. During the study, there will be two measurement periods. As one of the main outcomes of this study is infection susceptibility, the measurement periods will take place at approximately the first (September/October) (T0) and the last month (April/May) (T1, after 6 months) of the flu season. The measurements will consist of questionnaires, anthropometric measurements, a smartphone application to determine infection susceptibility, food diaries, actigraphy, light sensors, and blood sample analyses. The Klokwerk + study will contribute to the current need for high-quality data on the health effects of night-shift work and its underlying behavioral and physiological mechanisms. The findings can be the starting point for the development of interventions that

  20. Response to Dr Stevens' letter ref. Visitisen et al: "Short-term effects of night shift work on breast cancer risk: a cohort study of payroll data"

    DEFF Research Database (Denmark)

    Kolstad, Henrik A; Garde, Anne Helene; Hansen, Åse Marie

    2017-01-01

    We thank Dr Richard Stevens for his comments (1) on our recent article that showed no increased risk of breast cancer following recent night shift work when compared with recent day shift work (2). This finding was based on linkage of day-by-day information on working hours and breast cancer...... incidence data. Results are thus less likely to have been biased by differential misclassification than findings from earlier studies relying on self-report (3). We defined a night shift as ≥3 hours of work between 24:00-05:00 hours and a day shift as ≥3 hours work between 6:00-20:00 hours. This day shift...... definitions of shifts affect the risk of breast cancer, which will be possible using this type of data. We only had information on working hours from 2007 and onwards, and night shift work prior to 2007 could have confounded our analyses towards no effect but only if inversely associated with night shift work...

  1. Responses of nestling black-crowned night herons (Nycticorax nycticorax) to aquatic and terrestrial recreational activities: a manipulative study

    Science.gov (United States)

    Esteban Fernandez-Juricic; Patrick A. Zollner; Cherie LeBlanc Fisher; Lynne M. Westphal

    2007-01-01

    We assessed the effects of the presence and the frequency of canoe and pedestrian disturbance during two breeding seasons on multiple behavioral responses (scanning, freezing, grooming, sleeping, moving, wing-raising, and standing-up) of Black-crowned Night Heron ( Nycticorax nycticorax ) nestlings in a breeding colony in southeast Chicago. Short-...

  2. Systems of OsO4-RuO4 and Re2O7-OsO4

    International Nuclear Information System (INIS)

    Nisel'son, L.A.; Sokolova, T.D.; Orlov, A.M.; Shorikov, Yu.S.

    1981-01-01

    The meltability diagrams of the systems OsO 4 -RuO 4 and Re 2 O 7 -OsO 4 are studied using the visual-polythermal method. The OsO 4 -RuO 4 system forms a continuous series of solid solutions with practically rectilinear line of the liquidus. The Re 2 O 7 -OsO 4 system of the eutectic type has the eutectics degenerated from the side of OsO 4 . For the system OsO 4 (basis)-RuO 4 (admixture) the equilibrium coefficient of distribution is determined using the method of directed crystallization [ru

  3. Response to Dr Stevens' letter ref. Visitisen et al: "Short-term effects of night shift work on breast cancer risk: a cohort study of payroll data".

    Science.gov (United States)

    Kolstad, Henrik A; Garde, Anne Helene; Hansen, Åse Marie; Frydenberg, Morten; Christiansen, Peer; Vistisen, Helene Tilma; Bonde, Jens Peter E

    2017-01-01

    We thank Dr Richard Stevens for his comments (1) on our recent article that showed no increased risk of breast cancer following recent night shift work when compared with recent day shift work (2). This finding was based on linkage of day-by-day information on working hours and breast cancer incidence data. Results are thus less likely to have been biased by differential misclassification than findings from earlier studies relying on self-report (3). We defined a night shift as ≥3 hours of work between 24:00-05:00 hours and a day shift as ≥3 hours work between 6:00-20:00 hours. This day shift definition did not exclude shifts starting before 05:00 or ending after 24:00 hours. However, this affected only 0.02% and 0.3% of all day shifts, respectively. This diminutive misclassification, that is expected to be non-differential, can hardly explain our negative findings. It is suggested that shifts that begin after 07:00 and end before 18:00 would constitute a more sensible baseline comparison group. Since the biological mechanism is not certain, it is not obvious to us if this will be a more appropriate reference than the present. However, we agree that future studies should test how different definitions of shifts affect the risk of breast cancer, which will be possible using this type of data. We only had information on working hours from 2007 and onwards, and night shift work prior to 2007 could have confounded our analyses towards no effect but only if inversely associated with night shift work in 2007 or later. We find this unlikely. Left truncation could also have biased findings towards the null. We therefore supplemented analyses of the total study population with analyses of the one-third of the population with first recorded employment in 2008 or later (the inception population). Even if the mean age was 35.5 years - and many undoubtedly had been working (with and without night shifts) prior to 2008 - this population should be less affected by such

  4. Working night shifts affects surgeons' biological rhythm

    DEFF Research Database (Denmark)

    Amirian, Ilda; Andersen, Lærke T; Rosenberg, Jacob

    2015-01-01

    BACKGROUND: Chronic sleep deprivation combined with work during the night is known to affect performance and compromise residents' own safety. The aim of this study was to examine markers of circadian rhythm and the sleep-wake cycle in surgeons working night shifts. METHODS: Surgeons were monitor...

  5. Definitions of night eating in adolescent girls

    NARCIS (Netherlands)

    Striegel-Moore, RH; Thompson, D; Franko, DL; Barton, B; Affenito, S; Schreiber, GB; Daniels, [No Value

    Objective: To describe the prevalence of night eating in a community cohort of black and white girls, using different definitions of night eating as described in the literature. Research Methods and Procedures: Three-day food diaries collected as part of the National Growth and Health Study were

  6. Night Terrors (For Parents)

    Science.gov (United States)

    ... you tried. A night terror is a sleep disruption that seems similar to a nightmare , but is ... to: reduce your child's stress create a bedtime routine that's simple and relaxing make sure your child ...

  7. Night Rover Challenge

    Data.gov (United States)

    National Aeronautics and Space Administration — The objective of the Night Rover Challenge was to foster innovations in energy storage technology. Specifically, this challenge asked competitors to create an energy...

  8. Night Eating Disorders

    OpenAIRE

    Deniz Tuncel; Fatma Özlem Orhan

    2009-01-01

    Hunger is an awakening related biological impulse. The relationship between hunger and sleep is moderated by the control of homeostatic and circadian rhytms of the body. Abnormal eating behavior during sleep period could result from different causes. Abnormal eating during the main sleep period has been categorized as either night eating syndrome or sleep related eating disorder. Night eating syndrome (NES) is an eating disorder characterised by the clinical features of morning anorexia, even...

  9. Short-term effects of night shift work on breast cancer risk; a cohort study of payroll data

    DEFF Research Database (Denmark)

    Vistisen, Helene Tilma; Garde, Anne Helene; Frydenberg, Morten

    2017-01-01

    were followed from 2007-2012. Day-to-day work-hour information was available from payroll registers and 1245 incident cases of breast cancer were identified in national cancer registries together with receptor subtype information. Results: A rate ratio (RR) of 0.90 [95% confidence interval (95% CI) 0......Objectives: The objective was to examine if night shift work is a short-term risk factor for breast cancer, including combined estrogen receptor (ER) and human epidermal growth factor 2 (HER2) breast cancer subtypes. Methods: The cohort comprised 155 540 public sector female workers in Denmark who.......80-1.01] was observed for workers ever working night shifts during the follow-up period compared with workers only working day shifts after adjustment for age, age at first child, parity, family history of breast or ovarian cancer, sex hormones, medications related to alcoholism, family educational level, mammography...

  10. a Cross-Sectional Study on Insomnia among Japanese Adult Women in Relation to Night-Time Road Traffic Noise

    Science.gov (United States)

    Kageyama, T.; Kabuto, M.; Nitta, N.; Kurokawa, Y.; Taira, K.; Suzuki, S.; Takemoto, T.

    1997-08-01

    In an effort to determine the contribution of night-time road traffic noise to insomnia in the general population, 3600 adult Japanese women living in urban residential areas were surveyed. Living near a road with a heavy traffic volume is one of the risk factors for insomnia. The risk for insomnia in the zones 0-20 m from the main roads increased linearly with the night-time traffic volume. This suggests that road traffic noise raises the sound level in bedrooms in such zones, and consequently the prevalence rate of insomnia among the residents, and that noise-induced insomnia is an important public health problem, at least in highly urbanized areas.

  11. Experimental shift work studies of permanent night, and rapidly rotating, shift systems. Pt. 1. Behaviour of various characteristics of sleep

    Energy Technology Data Exchange (ETDEWEB)

    Knauth, P.; Rutenfranz, J.; Romberg, H.P.; Decoster, F.; Kiesswetter, E. (Dortmund Univ. (Germany, F.R.). Inst. fuer Arbeitsphysiologie); Schulz, H. (Max-Planck-Institut fuer Psychiatrie, Muenchen (Germany, F.R.). Klinisches Inst.)

    1980-06-01

    In connection with experimental shift work 20 volunteers were examined while working on different rapidly or slowly rotating shift systems. Sleep was analyzed over a total of 112 days. Sleep was disturbed by children's noise or traffic noise. Sleep duration and sleep quality were particularly badly affected by noise with a high information value (children's noise). The ultradian rhythmicity of sleep did not appear to be disrupted by the change from day to night work. There were no significant differences between morning sleep and afternoon sleep after night work. In the laboratory experiments with fixed sleep durations, no separate effects on sleep quality could be established for different shift systems.

  12. Long-term exposure to wind turbine noise at night and risk for diabetes: A nationwide cohort study.

    Science.gov (United States)

    Poulsen, Aslak Harbo; Raaschou-Nielsen, Ole; Peña, Alfredo; Hahmann, Andrea N; Nordsborg, Rikke Baastrup; Ketzel, Matthias; Brandt, Jørgen; Sørensen, Mette

    2018-04-14

    Focus on renewable energy sources and reduced unit costs has led to increased number of wind turbines (WTs). WT noise (WTN) is reported to be highly annoying at levels from 30 to 35 dB and up, whereas for traffic noise people report to be highly annoyed from 40 to 45 dB and up. This has raised concerns as to whether WTN may increase risk for major diseases, as exposure to traffic noise has consistently been associated with increased risk of cardiovascular disease and diabetes. We identified all Danish dwellings within a radius of 20 WT heights and 25% of all dwellings within 20-40 WT heights from a WT. Using detailed data on WT type and hourly wind data at each WT position and height, we estimated hourly outdoor and low frequency indoor WTN for all dwellings, aggregated as nighttime 1- and 5-year running means. Using nationwide registries, we identified a study population of 614,731 persons living in these dwellings in the period from 1996 to 2012, of whom 25,148 developed diabetes. Data were analysed using Poisson regression with adjustment for individual and area-levels covariates. We found no associations between long-term exposure to WTN during night and diabetes risk, with incidence rate ratios (IRRs) of 0.90 (95% confidence intervals (CI): 0.79-1.02) and 0.92 (95% CI: 0.68-1.24) for 5-year mean nighttime outdoor WTN of 36-42 and ≥ 42 dB, respectively, compared to < 24 dB. For 5-year mean nighttime indoor low frequency WTN of 10-15 and ≥ 15 dB we found IRRs of 0.90 (0.78-1.04) and 0.74 (95% CI: 0.41-1.34), respectively, when compared to and < 5 dB. The lack of association was consistent across strata of sex, distance to major road, validity of noise estimate and WT height. The present study does not support an association between nighttime WTN and higher risk of diabetes. However, there were only few cases in the highest exposure groups and findings need reproduction. Copyright © 2018 Elsevier Inc. All rights reserved.

  13. Minor Characters in William Shakespeare's Twelfth Night and A Midsummer Night's Dream

    Directory of Open Access Journals (Sweden)

    Zahraa Adnan Baqer

    2018-01-01

    Full Text Available This paper aims at discussing the role of the minor characters in William Shakespeare's Twelfth Night and A Midsummer Night's Dream. The study assumes that without the first group of minor characters, associated with Olivia, the play Twelfth Night would lose much of its humor, and without the second group, associated with Sebastian, the play would fall apart. On the other hand, in Shakespeare's A Midsummer Night's Dream minor characters play important roles, without them, the action dose not ran smoothly, or does not ran at all. The paper falls into three sections. Section one deals with the role of each minor character in Twelfth Night.  Section two focuses on the minor characters in A Midsummer Night's Dream. Section three is a conclusion which sums up the findings of the study.

  14. Study of the photon flux from the night sky at La Palma and Namibia, in the wavelength region relevant for imaging atmospheric Cherenkov telescopes

    International Nuclear Information System (INIS)

    Preuss, S.; Hermann, G.; Hofmann, W.; Kohnle, A.

    2002-01-01

    The level of the night-sky background light at La Palma and Namibia was determined, with emphasis on the wavelength region and solid angle coverage relevant for the operation of imaging atmospheric Cherenkov telescopes. The dependence of the night-sky background light both on celestial coordinates (alt,az) and on galactic coordinates (b,l) was measured, with an angular resolution of about 1 deg. Average light levels near the zenith are similar in both locations -2.2x10 12 -2.6x10 12 photons sr -1 s -1 m -2 for 300 nm<λ<650 nm. With increasing zenith angle the level of background light increases at La Palma, whereas a constant level is measured in Namibia. Near the center of the Milky Way, background light levels are increased by a factor up to 4 and more. Also the level of light backscattered from the ground has been studied

  15. The effect of dim light at night on cerebral hemodynamic oscillations during sleep: A near-infrared spectroscopy study.

    Science.gov (United States)

    Kim, Tae-Joon; Lee, Byeong Uk; Sunwoo, Jun-Sang; Byun, Jung-Ick; Moon, Jangsup; Lee, Soon-Tae; Jung, Keun-Hwa; Chu, Kon; Kim, Manho; Lim, Jong-Min; Lee, Eunil; Lee, Sang Kun; Jung, Ki-Young

    2017-01-01

    Recent studies have reported that dim light at night (dLAN) is associated with risks of cardiovascular complications, such as hypertension and carotid atherosclerosis; however, little is known about the underlying mechanism. Here, we evaluated the effect of dLAN on the cerebrovascular system by analyzing cerebral hemodynamic oscillations using near-infrared spectroscopy (NIRS). Fourteen healthy male subjects underwent polysomnography coupled with cerebral NIRS. The data collected during sleep with dim light (10 lux) were compared with those collected during sleep under the control dark conditions for the sleep structure, cerebral hemodynamic oscillations, heart rate variability (HRV), and their electroencephalographic (EEG) power spectrum. Power spectral analysis was applied to oxy-hemoglobin concentrations calculated from the NIRS signal. Spectral densities over endothelial very-low-frequency oscillations (VLFOs) (0.003-0.02 Hz), neurogenic VLFOs (0.02-0.04 Hz), myogenic low-frequency oscillations (LFOs) (0.04-0.15 Hz), and total LFOs (0.003-0.15 Hz) were obtained for each sleep stage. The polysomnographic data revealed an increase in the N2 stage under the dLAN conditions. The spectral analysis of cerebral hemodynamics showed that the total LFOs increased significantly during slow-wave sleep (SWS) and decreased during rapid eye movement (REM) sleep. Specifically, endothelial (median of normalized value, 0.46 vs. 0.72, p = 0.019) and neurogenic (median, 0.58 vs. 0.84, p = 0.019) VLFOs were enhanced during SWS, whereas endothelial VLFOs (median, 1.93 vs. 1.47, p = 0.030) were attenuated during REM sleep. HRV analysis exhibited altered spectral densities during SWS induced by dLAN, including an increase in very-low-frequency and decreases in low-frequency and high-frequency ranges. In the EEG power spectral analysis, no significant difference was detected between the control and dLAN conditions. In conclusion, dLAN can disturb cerebral hemodynamics via the

  16. Judgement of Breath Alcohol Concentration Levels Among Pedestrians in the Night-Time Economy-A Street-Intercept Field Study.

    Science.gov (United States)

    Cameron, M P; Roskruge, M J; Droste, N; Miller, P G

    2018-05-01

    To evaluate how well people in the night-time economy can assess their own breath alcohol concentration (BrAC), in the context of a change in breath alcohol limits for driving. We conducted a field study of 242 participants over 5 nights in the central business district of a university town in New Zealand. Participants completed a short survey, which included questions on their self-reported level of intoxication and the self-estimated BrAC. At the conclusion of the interview each participant was breath-tested. We compared actual and self-estimated BrAC using a scatter plot and multiple regression methods. The average BrAC error was 61.7 μg/l, meaning that on average participants overestimate their BrAC. Participants with a BrAC below 487 μg/l tended to overestimate their BrAC on average, and those with a BrAC above 487 μg/l tended to underestimate their BrAC on average. Regression results supported this observation, but also found that men who are not 'out on a typical night' overestimate their BrAC by more. Drinkers in this naturalistic setting have little idea of their level of intoxication, as measured by BrAC. However, this uncertainty may be advantageous to public health outcomes, since if drinkers are uncertain about their level of intoxication relative to the legal limit, this may lead them to avoid drunk driving. A field study of drinkers in the night-time economy of a New Zealand university town was conducted to evaluate how well drinkers can assess their breath alcohol concentration (BrAC). Drinkers in this setting inaccurately estimate their intoxication, and those with higher BrAC tended to underestimate their BrAC on average.

  17. Artificial light at night inhibits mating in a Geometrid moth

    NARCIS (Netherlands)

    van Geffen, Koert G.; van Eck, Emiel; de Boer, Rens A.; van Grunsven, Roy H.A.; Salis, Lucia; Berendse, Frank; Veenendaal, Elmar M.

    2015-01-01

    * Levels of artificial night lighting are increasing rapidly worldwide, subjecting nocturnal organisms to a major change in their environment. Many moth species are strongly attracted to sources of artificial night lighting, with potentially severe, yet poorly studied, consequences for development,

  18. The association between anxiety, hunger, the enjoyment of eating foods and the satiety after food intake in individuals working a night shift compared with after taking a nocturnal sleep: A prospective and observational study.

    Science.gov (United States)

    Santa Cecília Silva, Ane Andrade; Lopes, Tássia do Vale Cardoso; Teixeira, Kely Raspante; Mendes, Jordane Amaral; de Souza Borba, Matheus Eduardo; Mota, Maria Carliana; Waterhouse, Jim; Crispim, Cibele Aparecida

    2017-01-01

    Subjective responses to meals are altered by shortened sleep time and anxiety state, but this effect has been poorly studied in shift workers - who act as a typical model concerning sleep restriction and present high levels of anxiety. The objective of this study was to compare subjective perceptions of meals and the levels of anxiety in the same subjects after working night shifts and after taking a nocturnal sleep, and to investigate associations between the responses to meals and the levels of anxiety under these two conditions. The study evaluated 34 male permanent night-shift workers who worked a 12-h shift followed by a 36-h rest period. Evaluations included: sleep pattern (on three days after working night shifts and after sleeping at night); hunger, enjoyment of eating foods and satiety after a meal (evaluated by visual analogue scales on three non-consecutive days after working night shifts and after nocturnal sleeps); and state of anxiety (on a day after working a night shift and a day after a nocturnal sleep). In the days following a night shift, workers had higher mean hunger scores before lunch and higher anxiety scores than when they had slept at night (p = 0.007 and 0.001, respectively). Linear regression indicated that, after a night shift, anxiety scores were negatively associated with hunger before breakfast (p = 0.04) and lunch (p = 0.03), the enjoyment of eating foods (p = 0.03) and the number of meals eaten during the course of the 24 h (p = 0.03). It is concluded that night shifts increase mean hunger and anxiety scores. Anxiety levels seem to interfere with the responses associated with food consumption. Copyright © 2016 Elsevier Ltd. All rights reserved.

  19. Night shift work exposure profile and obesity: Baseline results from a Chinese night shift worker cohort

    Science.gov (United States)

    Feng, Wenting; Wang, Feng; Zhang, Liuzhuo; Wu, Zijun; Li, Zhimin; Zhang, Bo; He, Yonghua; Xie, Shaohua; Li, Mengjie; Fok, Joan P. C.; Tse, Gary; Wong, Martin C. S.; Tang, Jin-ling; Wong, Samuel Y. S.; Vlaanderen, Jelle; Evans, Greg; Vermeulen, Roel; Tse, Lap Ah

    2018-01-01

    Aims This study aimed to evaluate the associations between types of night shift work and different indices of obesity using the baseline information from a prospective cohort study of night shift workers in China. Methods A total of 3,871 workers from five companies were recruited from the baseline survey. A structured self-administered questionnaire was employed to collect the participants’ demographic information, lifetime working history, and lifestyle habits. Participants were grouped into rotating, permanent and irregular night shift work groups. Anthropometric parameters were assessed by healthcare professionals. Multiple logistic regression models were used to evaluate the associations between night shift work and different indices of obesity. Results Night shift workers had increased risk of overweight and obesity, and odds ratios (ORs) were 1.17 (95% CI, 0.97–1.41) and 1.27 (95% CI, 0.74–2.18), respectively. Abdominal obesity had a significant but marginal association with night shift work (OR = 1.20, 95% CI, 1.01–1.43). A positive gradient between the number of years of night shift work and overweight or abdominal obesity was observed. Permanent night shift work showed the highest odds of being overweight (OR = 3.94, 95% CI, 1.40–11.03) and having increased abdominal obesity (OR = 3.34, 95% CI, 1.19–9.37). Irregular night shift work was also significantly associated with overweight (OR = 1.56, 95% CI, 1.13–2.14), but its association with abdominal obesity was borderline (OR = 1.26, 95% CI, 0.94–1.69). By contrast, the association between rotating night shift work and these parameters was not significant. Conclusion Permanent and irregular night shift work were more likely to be associated with overweight or abdominal obesity than rotating night shift work. These associations need to be verified in prospective cohort studies. PMID:29763461

  20. Night shift work exposure profile and obesity: Baseline results from a Chinese night shift worker cohort.

    Science.gov (United States)

    Sun, Miaomiao; Feng, Wenting; Wang, Feng; Zhang, Liuzhuo; Wu, Zijun; Li, Zhimin; Zhang, Bo; He, Yonghua; Xie, Shaohua; Li, Mengjie; Fok, Joan P C; Tse, Gary; Wong, Martin C S; Tang, Jin-Ling; Wong, Samuel Y S; Vlaanderen, Jelle; Evans, Greg; Vermeulen, Roel; Tse, Lap Ah

    2018-01-01

    This study aimed to evaluate the associations between types of night shift work and different indices of obesity using the baseline information from a prospective cohort study of night shift workers in China. A total of 3,871 workers from five companies were recruited from the baseline survey. A structured self-administered questionnaire was employed to collect the participants' demographic information, lifetime working history, and lifestyle habits. Participants were grouped into rotating, permanent and irregular night shift work groups. Anthropometric parameters were assessed by healthcare professionals. Multiple logistic regression models were used to evaluate the associations between night shift work and different indices of obesity. Night shift workers had increased risk of overweight and obesity, and odds ratios (ORs) were 1.17 (95% CI, 0.97-1.41) and 1.27 (95% CI, 0.74-2.18), respectively. Abdominal obesity had a significant but marginal association with night shift work (OR = 1.20, 95% CI, 1.01-1.43). A positive gradient between the number of years of night shift work and overweight or abdominal obesity was observed. Permanent night shift work showed the highest odds of being overweight (OR = 3.94, 95% CI, 1.40-11.03) and having increased abdominal obesity (OR = 3.34, 95% CI, 1.19-9.37). Irregular night shift work was also significantly associated with overweight (OR = 1.56, 95% CI, 1.13-2.14), but its association with abdominal obesity was borderline (OR = 1.26, 95% CI, 0.94-1.69). By contrast, the association between rotating night shift work and these parameters was not significant. Permanent and irregular night shift work were more likely to be associated with overweight or abdominal obesity than rotating night shift work. These associations need to be verified in prospective cohort studies.

  1. Night-to-night arousal variability and interscorer reliability of arousal measurements.

    Science.gov (United States)

    Loredo, J S; Clausen, J L; Ancoli-Israel, S; Dimsdale, J E

    1999-11-01

    Measurement of arousals from sleep is clinically important, however, their definition is not well standardized, and little data exist on reliability. The purpose of this study is to determine factors that affect arousal scoring reliability and night-to-night arousal variability. The night-to-night arousal variability and interscorer reliability was assessed in 20 subjects with and without obstructive sleep apnea undergoing attended polysomnography during two consecutive nights. Five definitions of arousal were studied, assessing duration of electroencephalographic (EEG) frequency changes, increases in electromyographic (EMG) activity and leg movement, association with respiratory events, as well as the American Sleep Disorders Association (ASDA) definition of arousals. NA. NA. NA. Interscorer reliability varied with the definition of arousal and ranged from an Intraclass correlation (ICC) of 0.19 to 0.92. Arousals that included increases in EMG activity or leg movement had the greatest reliability, especially when associated with respiratory events (ICC 0.76 to 0.92). The ASDA arousal definition had high interscorer reliability (ICC 0.84). Reliability was lowest for arousals consisting of EEG changes lasting <3 seconds (ICC 0.19 to 0.37). The within subjects night-to-night arousal variability was low for all arousal definitions In a heterogeneous population, interscorer arousal reliability is enhanced by increases in EMG activity, leg movements, and respiratory events and decreased by short duration EEG arousals. The arousal index night-to-night variability was low for all definitions.

  2. Relationship of night and shift work with weight change and lifestyle behaviors.

    OpenAIRE

    Bekkers, M.B.M; Koppes, L.L.J.; Rodenburg, W.; Steeg, H. van; Proper, K.I.

    2015-01-01

    Objective: To prospectively study the association of night and shift work with weight change and lifestyle behaviors. Methods: Workers participating in the Netherlands Working Conditions Cohort Study (2008 and 2009) (N = 5951) reported night and shift work, weight and height. Groups included stable night or shift work, from day work to night or shift work, from night or shift work to day work, and no night or shift work in 2008 and 2009. Regression analyses were used to study association chan...

  3. Day and night grazing by cattle in the Sahel

    NARCIS (Netherlands)

    Ayantunde, A.A.; Fernandez-Rivera, S.; Hiernaux, P.H.; Keulen, van H.; Udo, H.M.J.

    2002-01-01

    The influence of night grazing on feeding behavior, nutrition and performance of cattle was studied. Twenty-four steers weighing 367 kg (SD = 76) grazed either from 0900 to 1900 (day grazers), 2100 to 0700 (night grazers) or 0900 to 1900 and 2400 to 0400 (day-and-night grazers) during 13 weeks. Four

  4. Night Eating Disorders

    Directory of Open Access Journals (Sweden)

    Deniz Tuncel

    2009-08-01

    Full Text Available Hunger is an awakening related biological impulse. The relationship between hunger and sleep is moderated by the control of homeostatic and circadian rhytms of the body. Abnormal eating behavior during sleep period could result from different causes. Abnormal eating during the main sleep period has been categorized as either night eating syndrome or sleep related eating disorder. Night eating syndrome (NES is an eating disorder characterised by the clinical features of morning anorexia, evening hyperphagia, and insomnia with awakenings followed by nocturnal food ingestion. Recently night eating syndrome, conceptualized as a delayed circadian intake of food. Sleep-related eating disorder, thought to represent a parasomnia and as such included within the revised International Classification of Sleep Disorders (ICSD-2, and characterized by nocturnal partial arousals associated with recurrent episodes of involuntary food consumption and altered levels of consciousness. Whether, however, sleep-related eating disorder and night eating syndrome represent different diseases or are part of a continuum is still debated. This review summarizes their characteristics, treatment outcomes and differences between them.

  5. "Twelfth Night" for Kids.

    Science.gov (United States)

    Burdett, Lois; Coburn, Christine

    Aimed at primary-age children, this book brings William Shakespeare's "Twelfth Night" to them, recognizing that children, properly guided, will take to Shakespeare's characters and stories like "ducks to water"; in the process they find their inner voices, they collaborate, they improvise, and they communicate. Illustrated with…

  6. A night sky model.

    Science.gov (United States)

    Erpylev, N. P.; Smirnov, M. A.; Bagrov, A. V.

    A night sky model is proposed. It includes different components of light polution, such as solar twilight, moon scattered light, zodiacal light, Milky Way, air glow and artificial light pollution. The model is designed for calculating the efficiency of astronomical installations.

  7. Charge Carrier Trapping Processes in RE2O2S (RE = La, Gd, Y, and Lu)

    NARCIS (Netherlands)

    Luo, H.; Bos, A.J.J.; Dorenbos, P.

    2017-01-01

    Two different charge carrier trapping processes have been investigated in RE2O2S:Ln3+ (RE = La, Gd, Y, and Lu; Ln = Ce, Pr, and Tb) and RE2O2S:M (M = Ti4+ and Eu3+). Cerium, praseodymium and terbium act as recombination centers and hole trapping centers while host intrinsic defects provide the

  8. The effect of blue-enriched white light on cognitive performances and sleepiness of night-shift workers: A field study.

    Science.gov (United States)

    Motamedzadeh, Majid; Golmohammadi, Rostam; Kazemi, Reza; Heidarimoghadam, Rashid

    2017-08-01

    Night-shift works are basically accompanied by reduced cognitive performance, sleepiness, and higher possibility for human error and related incidents. It is therefore crucial to improve individuals' performance and alertness in sensitive places like industries' control room with the ultimate goal of increasing efficiency and reducing the number of possible incidents. Previous research has indicated that blue light is a critical cue for entraining circadian rhythm. As a result, the present study was an attempt to investigate whether blue-enriched white light illumination was a practical strategy to decrease sleepiness and improve cognitive performance during night shifts. The study, which adopted a before-after interventional design, was conducted among 30 control room staff members of petrochemical industry. After baseline assessments under existing lighting conditions, every participant was exposed to two new lighting conditions (namely, 17,000K and 6500K blue-enriched white light), each lasting for a week. Assessments were conducted again at the end of these treatments. In order to measure the subjective sleepiness, Karolinska Sleepiness Scale (KSS) was utilized. Subjects also performed the Conners' Continuous Performance Test II (CPT-II) and 1-back test in order to gauge their cognitive performance, and melatonin assessment was carried out using salivary and Eliza technique. The data was analyzed using two-way repeated measure ANOVA. The results indicated that, compared to normal lighting conditions, participants' sleepiness and melatonin rhythm significantly declined when they were exposed to blue-enriched white light. Furthermore, the experimental condition had a significant effect on the reduction of working memory errors. It also decreased omission errors and the reaction time during the sustained attention task. Thus, using blue-enriched white light may be a proper ergonomic strategy for improving performance and alertness, especially during night, in

  9. Jupiter Night and Day

    Science.gov (United States)

    2001-01-01

    Day and night side narrow angle images taken on January 1, 2001 illustrating storms visible on the day side which are the sources of visible lightning when viewed on the night side. The images have been enhanced in contrast. Note the two day-side occurrences of high clouds, in the upper and lower parts of the image, are coincident with lightning storms seen on the darkside. The storms occur at 34.5 degrees and 23.5 degrees North latitude, within one degree of the latitudes at which similar lightning features were detected by the Galileo spacecraft. The images were taken at different times. The storms' longitudinal separation changes from one image to the next because the winds carrying them blow at different speeds at the two latitudes.

  10. Travelers In The Night

    Science.gov (United States)

    Grauer, Albert D.

    2014-11-01

    Travelers In The Night is an engaging and informative series of two minute radio programs about asteroids, comets, spacecraft, and other objects in space. The pieces are evergreen in that they are current but not dated. They are published on the Public Radio Exchange and carried by a number of radio stations. For teachers, students, and kids of all ages, the script for each piece and the start of a path for further inquiry can be found on the website travelersinthenight.org . The Travelers InThe Night Pieces are written and produced by an observing member of the Catalina Sky Survey Team at the University of Arizona. DPS members are encouraged to submit program ideas which can be developed to feature their research efforts.

  11. Letter in reference to: "Short-term effects of night shift work on breast cancer risk: a cohort study of payroll data".

    Science.gov (United States)

    Stevens, Richard G

    2017-01-01

    There are major flaws with the analyses in the Vistisen et al (1) cohort study examining if night shift work is a short-term risk factor for breast cancer. The crucial problem is the potential for exposure misclassification, which is very high. The authors' definition of day shift is "≥3 hours of work between 06:00-20:00 hours". This means that a worker on an 8-hour shift that begins at 03:00 hours would be classified as a day rather than night shift worker because he/she worked only two hours between 24:00-05:00 hours. Similarly, a second shifter might start work at 17:00 but not get off until 01:00 and yet still be classified as a "day shift" worker. This does not make sense as a baseline comparison group "unexposed" to work during the night hours. A sensible classification system would be to define "day shift" as any shift that begins after 07:00 and ends before 18:00 hours. This is straightforward and avoids all of the ambiguities inherent in the definition used by the authors. In addition, the authors claim that the "inception population" is less likely to have had past prior non-day work hours. However, this group has an average age of >35 years. It is inconceivable that all of these women were new graduates who started a public health sector job for the first time. Rather, the majority must surely have worked elsewhere for many years but then started in the regions covered only after 2006. This topic is too important, and this cohort too valuable, not to carefully define the baseline comparison group of "day workers" in a sensible manner. All the inferences rely crucially on this definition. The authors have the data to define the day-working baseline group in a way that avoids these obvious biases. That is why it is so frustrating that the authors chose to conduct the analyses as they did, with a highly flawed definition of "day work", when they could have done so much better. A highly flawed epidemiological report is worse than no report at all because

  12. Menstrual characteristics and night work among nurses.

    Science.gov (United States)

    Moen, Bente E; Baste, Valborg; Morken, Tone; Alsaker, Kjersti; Pallesen, Ståle; Bjorvatn, Bjørn

    2015-01-01

    Night work has been associated with adverse effects in terms of reproductive health. Specifically, menstruation has been suggested to be negatively impacted by night work, which again may influence fertility. This study investigated whether working nights is related to menstrual characteristics and if there is a relationship between shift work disorder (SWD) and menstruation. The study was cross-sectional, response rate 38%. The sample comprised female nurses who were members of the Norwegian Nurses Association; below 50 yr of age, who were not pregnant, did not use hormonal pills or intrauterine devices and who had not reached menopause (n=766). The nurses answered a postal survey including questions about night work and menstrual characteristics. Fifteen per cent reported to have irregular menstruations. Thirty-nine per cent of the nurses were classified as having SWD. Logistic regression analyses concerning the relationship between irregular menstruations and night work did not show any associations. Furthermore, no associations were found between cycle length or bleeding period and night work parameters. No associations were found between menstrual characteristics and SWD.

  13. Gender-specific independent and combined dose-response association of napping and night sleep duration with type 2 diabetes mellitus in rural Chinese adults: the RuralDiab study.

    Science.gov (United States)

    Liu, Ruihua; Li, Yuqian; Mao, Zhenxing; Liu, Xiaotian; Zhang, Haiqing; Yang, Kaili; Zhang, Honglei; Tu, Runqi; Qian, Xinling; Jiang, Jingjing; Bie, Ronghai; Wang, Chongjian

    2018-05-01

    The aim of this study was to explore the independent and combined dose-response association of napping and night sleep duration with type 2 diabetes mellitus (T2DM) among different genders in the rural Chinese population. For this research, a total of 19,257 participants were enrolled in the Rural Diabetes, Obesity and Lifestyle (RuralDiab) study. Napping and night sleep duration were assessed using the Pittsburgh Sleep Quality Index (PSQI). Restricted cubic splines and logistic regression were used to estimate the relationship between napping and night sleep duration with T2DM. A linear dose-response relationship between napping duration and T2DM as well as a U-shaped relationship between night sleep duration and T2DM were found. Compared with those who reported no napping, participants who had a napping duration of ≥91 min were associated with a 19% increase in prevalence of T2DM. Adjusted odds ratios (ORs) (95% confidence intervals (CIs)) for T2DM were 1.48 (1.03, 2.14) and 1.50 (1.22, 1.85) for shorter (≤5 h) and longer (>9 h) night sleep duration compared with the referential group. Additionally, the combination of longer napping duration (≥91 min) and night sleep duration (>9 h) increased 104% (95% CI: 45%, 128%) prevalence for T2DM. These associations were not found in males but were evident in females. Longer napping duration and extreme night sleep duration increased the prevalence of T2DM. Meanwhile, longer napping and night sleep duration might be jointly associated with a higher prevalence of T2DM. Copyright © 2018 Elsevier B.V. All rights reserved.

  14. Yttrium aluminum garnet (YAG) obtained by rare-earth mixed oxide (RE2O3)

    International Nuclear Information System (INIS)

    Castro, D.F.; Daguano, J.K.M.F.; Rodrigues Junior, D.; Suzuki, P.A.; Silva, O.M.M.

    2010-01-01

    In this work, the substitution of commercial Y 2 O 3 by a rare earth mixed oxide, RE 2 O 3 , to form Yttrium aluminum Garnet-Y 3 Al 5 O 12 , was investigated. Al 2 O 3 :Y 2 O 3 and Al 2 O 3 :RE 2 O 3 powder-mixtures, in a molar ratio of 60:40, were milled and subsequently cold uniaxially-pressed. Compacts were sintered at 1000, 1400 or 1600 deg C, for 120 minutes. RE 2 O 3 oxide was characterized by high-resolution synchrotron X-ray diffraction (HRXRD) and compared to Y 2 O 3 . X-ray diffraction pattern of the RE 2 O 3 indicates a true solid solution formation. Rietveld refinement of the sintered YAG and (RE)AG reveled a similar crystal structure to the YAGs obtained by the use of Al 2 O 3 -Y 2 O 3 or Al 2 O 3 -RE 2 O 3 respectively. Microstructural analysis of both, YAG or (RE)AG, revealed similar grain sizes of about 2.5 μm besides mechanical properties, with hardness of 400HV and fracture toughness of 3.8MPa.m1/2. It could be, thus, demonstrated that pure Y 2 O 3 can be substituted by the rare-earth solid solution, RE 2 O 3 , in the formation YAGs, presenting similar microstructural and mechanical properties. (author)

  15. Sleep, ageing and night work

    Directory of Open Access Journals (Sweden)

    M.L.N. Pires

    2009-09-01

    Full Text Available Studies have shown that the frequency or worsening of sleep disorders tends to increase with age and that the ability to perform circadian adjustments tends to decrease in individuals who work the night shift. This condition can cause consequences such as excessive sleepiness, which are often a factor in accidents that occur at work. The present study investigated the effects of age on the daytime and nighttime sleep patterns using polysomnography (PSG of long-haul bus drivers working fixed night or day shifts. A total of 124 drivers, free of sleep disorders and grouped according to age (<45 years, N = 85, and ≥45 years, N = 39 and PSG timing (daytime (D PSG, N = 60; nighttime (N PSG, N = 64 participated in the study. We observed a significant effect of bedtime (D vs N and found that the length of daytime sleep was shorter [D: <45 years (336.10 ± 73.75 min vs N: <45 years (398 ± 78.79 min and D: ≥45 years (346.57 ± 43.17 min vs N: ≥45 years (386.44 ± 52.92 min; P ≤ 0.05]. Daytime sleep was less efficient compared to nighttime sleep [D: <45 years (78.86 ± 13.30% vs N: <45 years (86.45 ± 9.77% and D: ≥45 years (79.89 ± 9.45% and N: ≥45 years (83.13 ± 9.13%; P ≤ 0.05]. An effect of age was observed for rapid eye movement sleep [D: <45 years (18.05 ± 6.12% vs D: ≥45 years (15.48 ± 7.11% and N: <45 years (23.88 ± 6.75% vs N: ≥45 years (20.77 ± 5.64%; P ≤ 0.05], which was greater in younger drivers. These findings are inconsistent with the notion that older night workers are more adversely affected than younger night workers by the challenge of attempting to rest during the day.

  16. The Sky at Night

    CERN Document Server

    Moore, Patrick

    2010-01-01

    For more than 50 years now Sir Patrick Moore has presented the BBC Television series Sky at Night; not a month has been missed – a record for any television series, and a record which may never be broken. Every three years or so a book is published covering the main events in both astronomy and space research. This is the 13th volume, not only a record of the programmes but also of the great advances and discoveries during the period covered - eclipses, comets, and the strange chemical lakes of Titan, for instance, but also anniversaries such as the fifteenth “birthday” of the Hubble Space Telescope, and not forgetting the programme celebrating the Sky at Night’s 50th year, attended by astronaut Piers Sellars and many others who appeared on the programme over the years. All the chapters are self-contained, and fully illustrated. In this new Sky at Night book you will find much to entertain you. It will appeal to amateurs and professionals alike.

  17. Do night-active birds lack daily melatonin rhythms? A case study comparing a diurnal and a nocturnal-foraging gull species

    NARCIS (Netherlands)

    Wikelski, M; Tarlow, EM; Eising, CM; Groothuis, TGG; Gwinner, E; Tarlow, Elisa M.; Groothuis, Ton G.G.; Bairlein, F.

    Plasma melatonin concentrations in most animals investigated so far increase at night regardless of whether individuals are day or night active. Nevertheless, daily melatonin amplitudes are often seasonally adjusted to ecological conditions, with birds that breed at high latitudes and migrate during

  18. Effect of sleep deprivation after a night shift duty on simulated crisis management by residents in anaesthesia. A randomised crossover study.

    Science.gov (United States)

    Arzalier-Daret, Ségolène; Buléon, Clément; Bocca, Marie-Laure; Denise, Pierre; Gérard, Jean-Louis; Hanouz, Jean-Luc

    2018-04-01

    Sleep deprivation has been associated with an increased incidence of medical errors and can jeopardise patients' safety during medical crisis management. The aim of the study was to assess the effect of sleep deprivation on the management of simulated anaesthesia crisis by residents in anaesthesiology. A randomised, comparative, monocentric crossover study involving 48 residents in anaesthesia was performed on a high fidelity patient simulator. Each resident was evaluated in a sleep-deprived state (deprived group, after a night shift duty) and control state (control group, after a night of sleep). Performance was assessed through points obtained during crisis scenario 1 (oesophageal intubation followed by anaphylactic shock) and scenario 2 (anaesthesia-related bronchospasm followed by ventricular tachycardia). Sleep periods were recorded by actigraphy. Two independent observers assessed the performances. The primary endpoint of the study was the score obtained for each scenario. Resident's crisis management performance is associated with sleep deprivation (scenario 1: control=39 [33-42] points vs. deprived=26 [19-40] points, P=0.02; scenario 2: control=21 [17-24] vs. deprived=14 [12-19], P=0.01). The main errors observed were: error in drug administration and dose, delay in identification of hypotension, and missing communication with the surgical team about situation. The present study showed that sleep deprivation is associated with impairment of performance to manage crisis situations by residents in anaesthesia. Copyright © 2017 Société française d’anesthésie et de réanimation (Sfar). Published by Elsevier Masson SAS. All rights reserved.

  19. Supportive leadership in Swedish community night nursing.

    Science.gov (United States)

    Gustafsson, Christine; Fagerberg, Ingegerd; Asp, Margareta

    2010-10-01

    The aim of the present study was to examine the support night nurses' give to staff in community night nursing. Studies have shown that support given to staff is one of night registered nurses' (RNs') experiences of the meaning of caring. This support, that community RNs display for staff in night-time care, is sparsely described. All community night-duty nurses in a medium-sized municipal in Sweden participated in the present study. Thematic content analysis was used to analyse data from observations. The support given by RNs to staff is described using three themes: (1) a conditional supporting stance, (2) preparing propitious conditions for caring and (3) confidence in the abilities of individual staff members and adaptation to their individual needs. The results reveal that RNs consider support to staff in terms of nursing leadership. Out of 'concern for the staff' the RNs try to be there for them, which corresponds to nursing leadership. Such concern also arises from the RNs' awareness that by giving support to staff this affects the staffs' caring for older people. The current municipal social care organization of community nursing of older people in which RNs have extensive responsibilities with insufficient control, is a working condition with a risk for decreased quality of care and a high risk for work-related stress syndrome. © 2010 The Authors. Journal compilation © 2010 Blackwell Publishing Ltd.

  20. The Impact of a Rigorous Multiple Work Shift Schedule and Day Versus Night Shift Work on Reaction Time and Balance Performance in Female Nurses: A Repeated Measures Study.

    Science.gov (United States)

    Thompson, Brennan J; Stock, Matt S; Banuelas, Victoria K; Akalonu, Chibuzo C

    2016-07-01

    The aim of this study was to determine the impact of a demanding work schedule involving long, cumulative work shifts on response time and balance-related performance outcomes and to evaluate the prevalence of musculoskeletal disorders between day and night shift working nurses. A questionnaire was used to identify the prevalence of past (12-month) and current (7-day) musculoskeletal disorders. Nurses worked three 12-hour work shifts in a 4-day period. Reaction time and balance tests were conducted before and after the work period. The work period induced impairments for reaction time, errors on reaction time tasks, and balance performance, independent of shift type. Musculoskeletal symptom prevalence was high in workers of both work shifts. Compressed work shifts caused performance-based fatigue in nurses. Reaction time and balance tests may be sensitive fatigue identification markers in nurses.

  1. Paul Graham, American Night

    Directory of Open Access Journals (Sweden)

    Catherine Bernard

    2006-12-01

    Full Text Available Le photographe britannique Paul Graham (1956- ne jouit pas encore en France de la notoriété de son compatriote Martin Parr et on ne peut, par conséquent, que se féliciter de voir l’une de ses plus puissantes séries — American Night — représentée à la Galerie Les Filles du Calvaire.Connu, avec Parr, pour avoir profondément influencé la photo documentaire anglaise en la faisant passer à la couleur avec virulence, Graham a été révélé il y a une vingtaine d’années par une série d’images prises à...

  2. Nightly Test system migration

    CERN Document Server

    Win-Lime, Kevin

    2013-01-01

    The summer student program allows students to participate to the Cern adventure. They can follow several interesting lectures about particle science and participate to the experiment work. As a summer student, I had worked for LHCb experiment. LHCb uses a lot of software to analyze its data. All this software is organized in packages and projects. They are built and tested during the night using an automated system and the results are displayed on a web interface. Actually, LHCb is changing this system. It is looking for a replacement candidate. So I was charged to unify some internal interfaces to permit a swift migration. In this document, I will describe shortly the system used by LHCb, then I will explain what I have done in detail.

  3. Dead of night.

    Science.gov (United States)

    Balter, Leon

    2010-07-01

    Dead of Night, the first psychoanalytic horror film, was produced in England in 1945, immediately after the end of World War II--that is, after the English population had suffered systematic Nazi terror from imminent invasion, incessant aerial bombing, and rocket-bombs. This film continued the prewar format of horror films based on themes of the supernatural and the hubris and excesses of science. However, it introduced psychoanalysis as the science in question. The film is structured on two levels: a genteel English country weekend to which witty and urbane guests have been invited; and five horror stories told by the guests. Psychoanalytic insights into this film structure are used here to explain how the film induces horror in the audience.

  4. A visual test based on a freeware software for quantifying and displaying night-vision disturbances: study in subjects after alcohol consumption.

    Science.gov (United States)

    Castro, José J; Ortiz, Carolina; Pozo, Antonio M; Anera, Rosario G; Soler, Margarita

    2014-05-07

    In this work, we propose the Halo test, a simple visual test based on a freeware software for quantifying and displaying night-vision disturbances perceived by subjects under different experimental conditions, more precisely studying the influence of the alcohol consumption on visual function. In the Halo test, viewed on a monitor, the subject's task consists of detecting luminous peripheral stimuli around a central high-luminance stimulus over a dark background. The test, performed by subjects before and after consuming alcoholic drinks, which deteriorate visual performance, evaluates the influence that alcohol consumption exerts on the visual-discrimination capacity under low illumination conditions. Measurements were made monocularly and binocularly. Pupil size was also measured in both conditions (pre/post). Additionally, we used a double-pass device to measure objectively the optical-quality of the eye and corroborate the results from the Halo test. We found a significant deterioration of the discrimination capacity after alcohol consumption, indicating that the higher the breath-alcohol content, the greater the deterioration of the visual-discrimination capacity. After alcohol intake, the graphical results showed a greater area of undetected peripheral stimuli around the central high-luminance stimulus. An enlargement of the pupil was also observed and the optical quality of the eye was deteriorated after alcohol consumption. A greater influence of halos and other night-vision disturbances were reported with the Halo test after alcohol consumption. The Halo freeware software constitutes a positive contribution for evaluating nighttime visual performance in clinical applications, such as reported here, but also in patients after refractive surgery (where halos are present) or for monitoring (time course) some ocular pathologies under pharmacological treatment.

  5. Night work and breast cancer risk defined by human epidermal growth factor receptor-2 (HER2) and hormone receptor status: A population-based case-control study in France.

    Science.gov (United States)

    Cordina-Duverger, Emilie; Koudou, Yves; Truong, Thérèse; Arveux, Patrick; Kerbrat, Pierre; Menegaux, Florence; Guénel, Pascal

    Night work has been associated with risk of breast cancer but this association needs to be confirmed. Because breast cancer is an etiologically heterogeneous disease, we explored the association of night work with breast cancer subtypes defined by tumor status (positive of negative) for estrogen-receptor (ER), progesterone-receptor (PR) and human epidermal growth factor-receptor 2 (HER2). Using the data from a case-control study in France including 975 cases and 1317 controls, we found that the odds ratios for ER+, PR+ or HER2+ breast cancers subtypes were significantly elevated, while no association with night shift work was observed for ER, PR or HER2-negative tumors. After stratification by menopausal status, the associations of night work with receptor-positive breast tumor subtypes were clearly seen in premenopausal women (odds ratios 2.04, 1.98 and 2.80, respectively) but did not appear in postmenopausal women. This study provides evidence that working at night may increase risk of ER, PR and HER2-positive subtypes of breast cancer particularly among premenopausal women.

  6. [Shift and night work and mental health].

    Science.gov (United States)

    Sancini, Angela; Ciarrocca, Manuela; Capozzella, Assunta; Corbosiero, Paola; Fiaschetti, Maria; Caciari, Tiziana; Cetica, Carlotta; Scimitto, Lara; Ponticiello, Barnaba Giuseppina; Tasciotti, Zaira; Schifano, Maria Pia; Andreozzit, Giorgia; Tomei, Francesco; Tomei, Gianfranco

    2012-01-01

    Aim of our study was to evaluate the influence that shift work and night work could have on mental health. A review of literary articles from 1990 to 2011 on shift work and night work was carried out. The results of this review confirmed that the shift work and night work affect mental health with the onset of neuropsychological disorders such as mood disorders, anxiety, nervousness, depressive anxiety syndromes, chronic fatigue and chronic insomnia irritability, sleep disturbances, reduction in levels of attention, cognitive impairments, alteration of circadian rhythm. Night work and shift work cause severe desynchronization of the cronobiological rhythms and a disruption of social life with negative effects on performance at work, on health and on social relationships. In the light of these results and recognizing shift work and night work as risk factors for the health of workers is necessary to implement preventive and periodic health checks by the occupational doctor to ensure the health and safety of workers taking account of the different environmental and individual factors.

  7. Suspension culture process for H9N2 avian influenza virus (strain Re-2).

    Science.gov (United States)

    Wang, Honglin; Guo, Suying; Li, Zhenguang; Xu, Xiaoqin; Shao, Zexiang; Song, Guicai

    2017-10-01

    H9N2 avian influenza virus has caused huge economic loss for the Chinese poultry industry since it was first identified. Vaccination is frequently used as a control method for the disease. Meanwhile suspension culture has become an important tool for the development of influenza vaccines. To optimize the suspension culture conditions for the avian influenza H9N2 virus (Re-2 strain) in Madin-Darby Canine Kidney (MDCK) cells, we studied the culture conditions for cell growth and proliferation parameters for H9N2 virus replication. MDCK cells were successfully cultured in suspension, from a small scale to industrial levels of production, with passage time and initial cell density being optimized. The influence of pH on the culture process in the reactor has been discussed and the process parameters for industrial production were explored via amplification of the 650L reactor. Subsequently, we cultivated cells at high cell density and harvested high amounts of virus, reaching 10log2 (1:1024). Furthermore an animal experiment was conducted to detect antibody. Compared to the chicken embryo virus vaccine, virus cultured from MDCK suspension cells can produce a higher amount of antibodies. The suspension culture process is simple and cost efficient, thus providing a solid foundation for the realization of large-scale avian influenza vaccine production.

  8. Night and day in the VA: associations between night shift staffing, nurse workforce characteristics, and length of stay.

    Science.gov (United States)

    de Cordova, Pamela B; Phibbs, Ciaran S; Schmitt, Susan K; Stone, Patricia W

    2014-04-01

    In hospitals, nurses provide patient care around the clock, but the impact of night staff characteristics on patient outcomes is not well understood. The aim of this study was to examine the association between night nurse staffing and workforce characteristics and the length of stay (LOS) in 138 veterans affairs (VA) hospitals using panel data from 2002 through 2006. Staffing in hours per patient day was higher during the day than at night. The day nurse workforce had more educational preparation than the night workforce. Nurses' years of experience at the unit, facility, and VA level were greater at night. In multivariable analyses controlling for confounding variables, higher night staffing and a higher skill mix were associated with reduced LOS. © 2014 Wiley Periodicals, Inc.

  9. Late Pliocene carnivores from Včeláre 2 (Southeastern Slovakia)

    Czech Academy of Sciences Publication Activity Database

    Sabol, M.; Holec, P.; Wagner, Jan

    2008-01-01

    Roč. 42, č. 5 (2008), s. 531-543 ISSN 0031-0301 Institutional research plan: CEZ:AV0Z30130516 Keywords : Homotherium * Ursus * Parailurus * Včeláre 2 (Slovakia) Subject RIV: EG - Zoology Impact factor: 0.369, year: 2008

  10. Structural, hyperfine and Raman properties of RE2FeSbO7 compounds

    International Nuclear Information System (INIS)

    Berndt, G.; Silva, K.L.; Ivashita, F.F.; Paesano, A.; Blanco, M.C.; Miner, E.V.P.; Carbonio, R.E.; Dantas, S.M.; Ayala, A.P.; Isnard, O.

    2015-01-01

    Highlights: • We prepared monophasic RE 2 FeSbO 7 pyrochlores. • RE 2 FeSbO 7 compounds were characterized regarding crystallographic, vibrational and hyperfine properties. • We find out that a site disorder takes place for the RE’s of larger ionic radii. • Lattice parameters, Raman bands and quadrupole splittings were shown to depend correlatedly on the RE ionic radius. - Abstract: Pyrochlores of the RE 2 FeSbO 7 type were synthesized by ball-milling followed by annealing in free atmosphere at high temperatures. The samples prepared were characterized by X-ray diffraction, Raman spectroscopy and 57 Fe Mössbauer spectroscopy, at room temperature. The results showed that RE 2 FeSbO 7 compounds have a cubic structure, i.e., Fd-3m (#227) space group, and that a site disorder takes place for the RE’s of larger ionic radii. Lattice parameters, Raman bands and quadrupole splittings were shown to depend correlatedly on the RE ionic radius. This behavior is discussed in terms of the pyrochlore crystallographic structure

  11. Do wild great tits avoid exposure to light at night?

    NARCIS (Netherlands)

    De Jong, M.; Ouyang, Jenny; van Grunsven, Roy H. A.; Visser, M.E.; Spoelstra, K.

    2016-01-01

    Studies of wild populations have provided important insights into the effects of artificial light at night on organisms, populations and ecosystems. However, in most studies the exact amount of light at night individuals are exposed to remains unknown. Individuals can potentially control their

  12. Do wild great tits avoid exposure to light at night?

    NARCIS (Netherlands)

    Jong, De Maaike; Ouyang, Jenny Q.; Grunsven, van Roy H.A.; Visser, Marcel E.; Spoelstra, Kamiel

    2016-01-01

    Studies of wild populations have provided important insights into the effects of artificial light at night on organisms, populations and ecosystems. However, in most studies the exact amount of light at night individuals are exposed to remains unknown. Individuals can potentially control their

  13. A Comparative Study of Shift Work Effects and Injuries among Nurses Working in Rotating Night and Day Shifts in a Tertiary Care Hospital of North India.

    Science.gov (United States)

    Verma, Anjana; Kishore, Jugal; Gusain, Shobha

    2018-01-01

    Shift work can have an impact on the physical and psychological well-being of the healthcare worker, affecting patients as well as their own safety at the workplace. This study was conducted to compare the health outcomes and injuries, along with associated risk factors between the nurses working in rotating night shift (RNS) as compared to day shift (DS) only. It was a cross-sectional study conducted from June to November 2016 in a tertiary care hospital of Delhi. It involved 275 nurses working in RNS and 275 nurses from DS of various departments, selected through simple random sampling. Standard Shift Work Index Questionnaire (SSI) was used as the study instrument, with selected variables (according to objectives of the study). Data were analyzed using descriptive statistics, Chi-square, t -test, and multivariate regression. Female nurses had more sleep disturbance, fatigue, and poor psychological health. Working on a contractual basis, RNS, and living outside the hospital campus were associated with higher odds of having needle stick injury (NSI). The nurses working in RNSs were found to have significantly lower mean scores in job satisfaction ( p = 0.04), sleep ( p working in RNSs call for the interventions, focused on various factors which can be modified to provide supportive and safer working environment.

  14. A comparative study of shift work effects and injuries among nurses working in rotating night and day shifts in a Tertiary Care Hospital of North India

    Directory of Open Access Journals (Sweden)

    Anjana Verma

    2018-01-01

    Full Text Available Background: Shift work can have an impact on the physical and psychological well-being of the healthcare worker, affecting patients as well as their own safety at the workplace. This study was conducted to compare the health outcomes and injuries, along with associated risk factors between the nurses working in rotating night shift (RNS as compared to day shift (DS only. Materials and Methods: It was a cross-sectional study conducted from June to November 2016 in a tertiary care hospital of Delhi. It involved 275 nurses working in RNS and 275 nurses from DS of various departments, selected through simple random sampling. Standard Shift Work Index Questionnaire (SSI was used as the study instrument, with selected variables (according to objectives of the study. Data were analyzed using descriptive statistics, Chi-square, t-test, and multivariate regression. Results: Female nurses had more sleep disturbance, fatigue, and poor psychological health. Working on a contractual basis, RNS, and living outside the hospital campus were associated with higher odds of having needle stick injury (NSI.The nurses working in RNSs were found to have significantly lower mean scores in job satisfaction (p = 0.04, sleep (p < 0.001, and psychological well-being (p = 0.047 as compared to DS workers. Conclusions: Health outcomes among nurses working in RNSs call for the interventions, focused on various factors which can be modified to provide supportive and safer working environment.

  15. The impact of night work on subjective reports of well-being: an exploratory study of health care workers from five nations

    Directory of Open Access Journals (Sweden)

    Donald I Tepas

    2004-12-01

    Full Text Available OBJECTIVE: To carry out a survey data collection from health care workers in Brazil, Croatia, Poland, Ukraine and the USA with two primary goals: (1 to provide information about which aspects of well-being are most likely to need attention when shiftwork management solutions are being developed, and (2 to explore whether nations are likely to differ with respect to the impacts of night work on the well-being of workers involved in health care work. METHODS: The respondents from each nation were sorted into night worker and non-night worker groups. Worker perceptions of being physically tired, mentally tired, and tense at the end of the workday were examined. Subjective reports of perceived felt age were also studied. For each of these four dependent variables, an ANCOVA analysis was carried out. Hours worked per week, stability of weekly work schedule, and chronological age were the covariates for these analyses. RESULTS: The results clearly support the general proposal that nations differ significantly in worker perceptions of well-being. In addition, perceptions of physical and mental tiredness at the end of the workday were higher for night workers. For the perception of being physically tired at the end of a workday, the manner and degree to which the night shift impacts the workers varies by nation. CONCLUSIONS: Additional research is needed to determine if the nation and work schedule differences observed are related to differences in job tasks, work schedule structure, off-the-job variables, and/or other worker demographic variables.OBJETIVO: Coletar dados de pesquisa de profissionais da saúde no Brasil, Croácia, Polônia, Ucrânia e Estados Unidos com duas metas principais: (1 proporcionar informações quanto a aspectos do bem-estar que mais provavelmente precisam de atenção durante a elaboração de soluções administrativas para os turnos de trabalho e (2 examinar a existência de possíveis diferenças entre os países quanto ao

  16. Night-life of Bryde's whales

    DEFF Research Database (Denmark)

    Izadi, Sahar; Johnson, Mark; Aguilar de Soto, Natacha

    2018-01-01

    logging tags on resident Bryde'swhales in a busy gulf to study their daily activity patterns. We found that, while whales were active during daytime making energetic lunges to capture tonnes of plankton, they dedicated much of the night to rest. This suggests that whales may rely on vision to find prey...

  17. Artificial night lighting inhibits feeding in moths

    NARCIS (Netherlands)

    Langevelde, Van Frank; Grunsven, Van Roy H.A.; Veenendaal, Elmar M.; Fijen, Thijs P.M.

    2017-01-01

    One major, yet poorly studied, change in the environment is nocturnal light pollution, which strongly alters habitats of nocturnally active species. Artificial night lighting is often considered as driving force behind rapid moth population declines in severely illuminated countries. To understand

  18. Night-shift work increases morbidity of breast cancer and all-cause mortality: a meta-analysis of 16 prospective cohort studies.

    Science.gov (United States)

    Lin, Xiaoti; Chen, Weiyu; Wei, Fengqin; Ying, Mingang; Wei, Weidong; Xie, Xiaoming

    2015-11-01

    Night-shift work (NSW) has previously been related to incidents of breast cancer and all-cause mortality, but many published studies have reported inconclusive results. The aim of the present study was to quantify a potential dose-effect relationship between NSW and morbidity of breast cancer, and to evaluate the association between NSW and risk of all-cause mortality. The outcomes included NSW, morbidity of breast cancer, cardiovascular mortality, cancer-related mortality, and all-cause mortality. Sixteen investigations were included, involving 2,020,641 participants, 10,004 incident breast cancer cases, 7185 cancer-related deaths, 4820 cardiovascular end points, and 2480 all-cause mortalities. The summary risk ratio (RR) of incident breast cancer for an increase of NSW was 1.057 [95% confidence interval (CI) 1.014-1.102; test for heterogeneity p = 0.358, I(2) = 9.2%]. The combined RR (95% CI) of breast cancer risk for NSW vs daytime work was: 1.029 (0.969-1.093) in the 20-year exposure lengths. The overall RR was 1.089 (95% CI 1.016-1.166) in a fixed-effects model (test for heterogeneity p = 0.838, I(2) = 0%) comparing rotating NSW and day work. Night-shift work was associated with an increased risk of cardiovascular death (RR 1.027, 95% CI 1.001-1.053), and all-cause death 1.253 (95% CI 0.786-1.997). In summary, NSW increased the risk of breast cancer morbidity by: 1.9% for 5 years, 2.5% for 5-10 years, 7.4% for 10-20 years, and 8.8% for >20-years of NSW. Additionally, rotating NSW enhanced the morbidity of breast cancer by 8.9%. Moreover, NSW was associated with a 2.7% increase in cardiovascular death. Copyright © 2015. Published by Elsevier B.V.

  19. Traffic Light Detection at Night

    DEFF Research Database (Denmark)

    Jensen, Morten Bornø; Philipsen, Mark Philip; Bahnsen, Chris

    2015-01-01

    Traffic light recognition (TLR) is an integral part of any in- telligent vehicle, it must function both at day and at night. However, the majority of TLR research is focused on day-time scenarios. In this paper we will focus on detection of traffic lights at night and evalu- ate the performance...... of three detectors based on heuristic models and one learning-based detector. Evaluation is done on night-time data from the public LISA Traffic Light Dataset. The learning-based detector out- performs the model-based detectors in both precision and recall. The learning-based detector achieves an average...

  20. AHP 47: A NIGHT DATE

    Directory of Open Access Journals (Sweden)

    Phun tshogs dbang rgyal ཕུན་ཚོགས་དབང་རྒྱལ།

    2017-04-01

    Full Text Available The author was born in 1993 in Ska chung (Gaqun Village, Nyin mtha' (Ningmute Township, Rma lho (Henan Mongolian Autonomous County, Rma lho (Huangnan Tibetan Autonomous Prefecture, Mtsho sngon (Qinghai Province, PR China. Night dating was popular for teenage boys some years ago. They rode horses and yaks when they went night dating. They generally rode yaks, because horses were important for their families and used for such important tasks as pursuing bandits and going to the county town for grain and supplies. An early experience with night dating is described.

  1. A hard day's night : a longitudinal study on the relationships among job demands and job control, sleep quality and fatigue

    NARCIS (Netherlands)

    De Lange, Annet H.; Kompier, Michiel A. J.; Taris, Toon W.; Geurts, Sabine A. E.; Beckers, Debby G. J.; Houtman, Irene L. D.; Bongers, Paulien M.

    This prospective four-wave study examined (i) the causal direction of the longitudinal relations among job demands, job control, sleep quality and fatigue; and (ii) the effects of stability and change in demand-control history on the development of sleep quality and fatigue. Based on results of a

  2. A hard day's night: a longitudinal study on the relationships among job demands and job control, sleep quality and fatigue

    NARCIS (Netherlands)

    Lange, A.H. de; Kompier, M.A.J.; Taris, T.W.; Geurts, S.A.E.; Beckers, D.G.J.; Houtman, I.L.D.; Bongers, P.M.

    2009-01-01

    This prospective four-wave study examined (i) the causal direction of the longitudinal relations among job demands, job control, sleep quality and fatigue; and (ii) the effects of stability and change in demand-control history on the development of sleep quality and fatigue. Based on results of a

  3. A hard day's night: a longitudinal study on the relationships among job demands and job control, sleep quality and fatigue

    NARCIS (Netherlands)

    de Lange, A.H.; Kompier, M.A.J.; Taris, T.W.; Geurts, S.A.E.; Beckers, D.G.J.; Houtman, I.L.H.; Bongers, P.M.

    2009-01-01

    Summary This prospective four-wave study examined (i) the causal direction of the longitudinal relations among job demands, job control, sleep quality and fatigue; and (ii) the effects of stability and change in demand-control history on the development of sleep quality and fatigue. Based on results

  4. A hard day's night: A longitudinal study on the relationships among job demands and job control, sleep quality and fatigue

    NARCIS (Netherlands)

    Lange, A.H.de; Kompier, M.A.J.; Taris, T.W.; Geurts, S.A.E.; Beckers, D.G.J.; Houtman, I.L.D.; Bongers, P.M.

    2009-01-01

    This prospective four-wave study examined (i) the causal direction of the longitudinal relations among job demands, job control, sleep quality and fatigue; and (ii) the effects of stability and change in demand-control history on the development of sleep quality and fatigue. Based on results of a

  5. Cellular phone use while driving at night.

    Science.gov (United States)

    Vivoda, Jonathon M; Eby, David W; St Louis, Renée M; Kostyniuk, Lidia P

    2008-03-01

    Use of a cellular phone has been shown to negatively affect one's attention to the driving task, leading to an increase in crash risk. At any given daylight hour, about 6% of US drivers are actively talking on a hand-held cell phone. However, previous surveys have focused only on cell phone use during the day. Driving at night has been shown to be a riskier activity than driving during the day. The purpose of the current study was to assess the rate of hand-held cellular phone use while driving at night, using specialized night vision equipment. In 2006, two statewide direct observation survey waves of nighttime cellular phone use were conducted in Indiana utilizing specialized night vision equipment. Combined results of driver hand-held cellular phone use from both waves are presented in this manuscript. The rates of nighttime cell phone use were similar to results found in previous daytime studies. The overall rate of nighttime hand-held cellular phone use was 5.8 +/- 0.6%. Cellular phone use was highest for females and for younger drivers. In fact, the highest rate observed during the study (of 11.9%) was for 16-to 29-year-old females. The high level of cellular phone use found within the young age group, coupled with the increased crash risk associated with cellular phone use, nighttime driving, and for young drivers in general, suggests that this issue may become an important transportation-related concern.

  6. Night eating among veterans with obesity.

    Science.gov (United States)

    Dorflinger, Lindsey M; Ruser, Christopher B; Masheb, Robin M

    2017-10-01

    The obesity rate is higher among veterans than the general population, yet few studies have examined their eating behaviors, and none have examined the presence of night eating and related comorbidities. This study examines night eating syndrome (NES) among veterans seeking weight management treatment, and relationships between NES and weight, insomnia, disordered eating, and psychological variables. The sample consisted of 110 veterans referred to a weight management program at VA Connecticut Healthcare System. More than one out of ten veterans screened positive for NES, and one-third screened positive for insomnia. Most individuals screening positive for NES also screened positive for insomnia. Night eating was associated with higher BMI, and with higher scores on measures of binge eating, emotional overeating, and eating disorder symptomatology. Veterans screening positive for NES were also significantly more likely to screen positive for depression and PTSD. When controlling for insomnia, only the relationships between night eating and binge and emotional eating remained significant. Those screening positive for PTSD were more likely to endorse needing to eat to return to sleep. Findings suggest that both NES and insomnia are common among veterans seeking weight management services, and that NES is a marker for additional disordered eating behavior, specifically binge eating and overeating in response to emotions. Additional studies are needed to further delineate the relationships among NES, insomnia, and psychological variables, as well as to examine whether specifically addressing NES within behavioral weight management interventions can improve weight outcomes and problematic eating behaviors. Published by Elsevier Ltd.

  7. Relationship between thyroid stimulating hormone and night shift work.

    Science.gov (United States)

    Moon, So-Hyun; Lee, Bum-Joon; Kim, Seong-Jin; Kim, Hwan-Cheol

    2016-01-01

    Night shift work has well-known adverse effects on health. However, few studies have investigated the relationship between thyroid diseases and night shift work. This study aimed to examine night shift workers and their changes in thyroid stimulating hormones (TSH) levels over time. Medical check-up data (2011-2015) were obtained from 967 female workers at a university hospital in Incheon, Korea. Data regarding TSH levels were extracted from the records, and 2015 was used as a reference point to determine night shift work status. The relationships between TSH levels and night shift work in each year were analyzed using the general linear model (GLM). The generalized estimating equation (GEE) was used to evaluate the repeated measurements over the 5-year period. The GEE analysis revealed that from 2011 to 2015, night shift workers had TSH levels that were 0.303 mIU/L higher than the levels of non-night shift workers (95 % CI: 0.087-0.519 mIU/L, p  = 0.006) after adjusting for age and department. When we used TSH levels of 4.5 ≥ mIU/L to identify subclinical hypothyroidism, night shift workers exhibited a 1.399 fold higher risk of subclinical hypothyroidism (95 % CI: 1.050-1.863, p  = 0.022), compared to their non-night shift counterparts. This result of this study suggests that night shift workers may have an increased risk of thyroid diseases, compared to non-night shift workers.

  8. Investigation of sleep disturbance in chronic low back pain: an age- and gender-matched case-control study over a 7-night period.

    LENUS (Irish Health Repository)

    van de Water, Alexander T M

    2011-12-01

    Sleep disturbance is frequently reported by people with chronic low back pain (>12 weeks; CLBP), but few studies have comprehensively investigated sleep in this population. This study investigated differences in subjectively and objectively measured sleep patterns of people with CLBP, and compared this to age- and gender matched controls. Thirty-two consenting participants (n = 16 with CLBP, n = 16 matched controls), aged 24-65 years (43.8% male) underwent an interview regarding sleep influencing variables, completed the Pittsburgh Sleep Quality Index, Insomnia Severity Index, Pittsburgh Sleep Diary, SF36-v2, Hospital Anxiety and Depression Scale, Oswestry Disability Index, Numerical Pain Rating Scales, and underwent seven consecutive nights of actigraphic measurement in the home environment. Compared to controls, people with CLBP had, on self-report measures, significantly poorer sleep quality [Pittsburgh Sleep Quality Index (range 0-21) mean (SD) 10.9 (4.2)], clinical insomnia [Insomnia Severity Index mean (range 0-28) 13.7 (7.6)], lower sleep efficiency, longer sleep onset latency, more time awake after sleep onset, and more awakenings during sleep (p < 0.05). However, no significant differences between groups were found on objective actigraphy (p > 0.05). The findings provide some evidence to support self-reported sleep assessment as an outcome measure in CLBP research, while further research is needed to determine the validity of objective sleep measurement in this population.

  9. A hard day's night: a longitudinal study on the relationships among job demands and job control, sleep quality and fatigue.

    Science.gov (United States)

    de Lange, Annet H; Kompier, Michiel A J; Taris, Toon W; Geurts, Sabine A E; Beckers, Debby G J; Houtman, Irene L D; Bongers, Paulien M

    2009-09-01

    This prospective four-wave study examined (i) the causal direction of the longitudinal relations among job demands, job control, sleep quality and fatigue; and (ii) the effects of stability and change in demand-control history on the development of sleep quality and fatigue. Based on results of a four-wave complete panel study among 1163 Dutch employees, we found significant effects of job demands and job control on sleep quality and fatigue across a 1-year time lag, supporting the strain hypothesis (Demand-Control model; Karasek and Theorell, Basic Books, New York, 1990). No reversed or reciprocal causal patterns were detected. Furthermore, our results revealed that cumulative exposure to a high-strain work environment (characterized by high job demands and low job control) was associated with elevated levels of sleep-related complaints. Cumulative exposure to a low-strain work environment (i.e. low job demands and high job control) was associated with the highest sleep quality and lowest level of fatigue. Our results revealed further that changes in exposure history were related to changes in reported sleep quality and fatigue across time. As expected, a transition from a non-high-strain towards a high-strain job was associated with a significant increase in sleep-related complaints; conversely, a transition towards a non-high-strain job was not related to an improvement in sleep-related problems.

  10. Gender Roles and Night-Sky Watching among College Students

    Science.gov (United States)

    Kelly, William E.; McGee, Catherine M.

    2012-01-01

    The present study investigated the relationship between gender roles and night-sky watching in a sample of college students (N=161). The Bem Sex-Role Inventory (BSRI) and the Noctcaelador Inventory (NI) were used to investigate the differences between gender role groups for night-sky watching. The results supported the hypothesis that androgynous…

  11. Artificial light at night inhibits mating in a Geometrid moth

    NARCIS (Netherlands)

    Geffen, van K.G.; Eck, van E.; Boer, de R.; Grunsven, van R.H.A.; Salis, F.; Berendse, F.; Veenendaal, E.M.

    2015-01-01

    1.Levels of artificial night lighting are increasing rapidly worldwide, subjecting nocturnal organisms to a major change in their environment. Many moth species are strongly attracted to sources of artificial night lighting, with potentially severe, yet poorly studied, consequences for development,

  12. Behavioral management of night eating disorders

    Directory of Open Access Journals (Sweden)

    Berner LA

    2013-03-01

    Full Text Available Laura A Berner,1 Kelly C Allison2 1Department of Psychology, Drexel University, 2Department of Psychiatry, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA Abstract: Night eating syndrome (NES is a form of disordered eating associated with evening hyperphagia (overeating at night and nocturnal ingestions (waking at night to eat. As with other forms of disordered eating, cognitive and behavioral treatment modalities may be effective in reducing NES symptoms. This review presents evidence for a variety of behavioral treatment approaches, including behavioral therapy, phototherapy, behavioral weight loss treatment, and cognitive-behavioral therapy. A more detailed overview of cognitive-behavioral therapy for NES is provided. All of these studies have been case studies or included small samples, and all but one have been uncontrolled, but the outcomes of many of these approaches are promising. Larger randomized controlled trials are warranted to advance NES treatment literature. With the inclusion of NES in the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5 as a “Feeding or Eating Disorder Not Elsewhere Classified,” more sophisticated, empirically-supported, behaviorally-based treatment approaches are much needed. Keywords: night eating syndrome, cognitive-behavioral treatment, phototherapy, behavioral weight loss, behavior therapy

  13. Discover POPSCIENCE on Researchers' Night

    CERN Multimedia

    The POPSCIENCE Team

    2014-01-01

    On Friday 26 September 2014, CERN will be celebrating European Researchers' Night at three venues in Geneva and St. Genis-Pouilly. Inspired by Andy Warhol, this year's theme is “Pop science is for everyone”.     Every year, on the last Friday of September, the European Researchers’ Night takes place in about 300 cities all over Europe, with funding from the EU, to promote research and highlight researchers in engaging and fun ways for the general public. Andy Warhol said, “Pop art is for everyone”. This year, “Pop science is for everyone” is the motto of the Researchers’ Night event organised by CERN and its partners*. The night will offer everyone the opportunity to learn about the latest discoveries in physics and cosmology through poetry, theatre and music. This will be in addition to the event's traditional activities for the general public. To attract new audiences,...

  14. Estudo comparativo de padrões de sono em trabalhadores de enfermagem dos turnos diurno e noturno Comparative study of sleep patterns in nurses working day and night shifts

    Directory of Open Access Journals (Sweden)

    Milva Maria Figueiredo de Martino

    2002-08-01

    Full Text Available Objetivo. Comparar os padrões de sono de enfermeiros dos turnos diurno e noturno em um hospital de Campinas (SP, Brasil. Métodos. Participaram 59 enfermeiros entre 23 e 59 anos. Para os enfermeiros do dia, analisou-se o sono noturno, e, para os da noite, os sonos diurno e noturno. Os informantes preencheram um diário do sono durante 1 semana, ao acordar. Foram analisados hora de ir deitar, de dormir, e de acordar; latência do sono; horas de sono noturno e diurno; cochilos; qualidade do sono; modo de acordar; e comparação do sono registrado no diário com o sono habitual. Também foram coletadas informações pessoais e profissionais. Resultados. O grupo diurno ia dormir às 23h36min e o grupo noturno, às 23h52min (P Objective. To compare sleep patterns in nurses working day and night shifts in a hospital in Campinas (SP, Brazil. Methods. Fifty-nine nurses between 23 and 59 years of age participated in the study. For day shift workers, the pattern of nocturnal sleep was examined; for night shift workers, nocturnal and diurnal sleep patterns were examined. During 1 week, participants filled out a sleep diary right after waking up. The following items were assessed: time going to bed, falling asleep, and waking up; sleep latency; duration in hours of nocturnal and diurnal sleep; naps; quality of sleep; mode of waking up; and comparison between the sleep recorded in the diary with the usual sleep. Personal and professional information was also collected. Results. Day shift workers went to bed at 23h36min, and night workers at 23h52min (P > 0.05. The nurses working a day schedule woke up earlier (7h3min than those working a night schedule when they slept at night (8h30min (P <= 0.004, Wilcoxon. Mean sleep latency was 23min26s for day shift nurses versus 22min50s for night shift nurses; the duration of nocturnal sleep was 7h11min and 9h6min, respectively. Only day workers took naps (mean 2h3min. The average diurnal sleep of night shift nurses

  15. Effects of artificial light at night on human health: A literature review of observational and experimental studies applied to exposure assessment.

    Science.gov (United States)

    Cho, YongMin; Ryu, Seung-Hun; Lee, Byeo Ri; Kim, Kyung Hee; Lee, Eunil; Choi, Jaewook

    2015-01-01

    It has frequently been reported that exposure to artificial light at night (ALAN) may cause negative health effects, such as breast cancer, circadian phase disruption and sleep disorders. Here, we reviewed the literature assessing the effects of human exposure to ALAN in order to list the health effects of various aspects of ALAN. Several electronic databases were searched for articles, published through August 2014, related to assessing the effects of exposure to ALAN on human health; these also included the details of experiments on such exposure. A total of 85 articles were included in the review. Several observational studies showed that outdoor ALAN levels are a risk factor for breast cancer and reported that indoor light intensity and individual lighting habits were relevant to this risk. Exposure to artificial bright light during the nighttime suppresses melatonin secretion, increases sleep onset latency (SOL) and increases alertness. Circadian misalignment caused by chronic ALAN exposure may have negative effects on the psychological, cardiovascular and/or metabolic functions. ALAN also causes circadian phase disruption, which increases with longer duration of exposure and with exposure later in the evening. It has also been reported that shorter wavelengths of light preferentially disturb melatonin secretion and cause circadian phase shifts, even if the light is not bright. This literature review may be helpful to understand the health effects of ALAN exposure and suggests that it is necessary to consider various characteristics of artificial light, beyond mere intensity.

  16. The Role of Logistics in Practical Levelized Cost of Energy Reduction Implementation and Government Sponsored Cost Reduction Studies: Day and Night in Offshore Wind Operations and Maintenance Logistics

    Directory of Open Access Journals (Sweden)

    Thomas Poulsen

    2017-04-01

    Full Text Available This paper reveals that logistics make up at least 17% of annual operational expenditure costs for offshore wind farms. Annual operational expenditure is found to vary by a factor of 9.5, making its share of levelized cost of energy for offshore wind range from 13% to 57%. These are key findings of a 20-month research project targeting cost reduction initiatives for offshore wind systems. The findings reveal that cost-out measures are difficult to implement due to cultural differences. Implementation efforts are rendered by personnel located offshore in a harsh sea environment which is in stark contrast to the shore-based office personnel who develop studies directing cost reduction efforts. This paper details the company motivation to join industry-wide cost reduction initiatives. A business case for offshore wind operations and maintenance logistics yielding 1% savings in levelized cost of energy is included on how to expand working hours from daytime to also work at night.

  17. Night-Time Light Dynamics during the Iraqi Civil War

    Directory of Open Access Journals (Sweden)

    Xi Li

    2018-06-01

    Full Text Available In this study, we analyzed the night-time light dynamics in Iraq over the period 2012–2017 by using Visible Infrared Imaging Radiometer Suite (VIIRS monthly composites. The data quality of VIIRS images was improved by repairing the missing data, and the Night-time Light Ratio Indices (NLRIs, derived from urban extent map and night-time light images, were calculated for different provinces and cities. We found that when the Islamic State of Iraq and Syria (ISIS attacked or occupied a region, the region lost its light rapidly, with the provinces of Al-Anbar, At-Ta’min, Ninawa, and Sala Ad-din losing 63%, 73%, 88%, and 56%, of their night-time light, respectively, between December 2013 and December 2014. Moreover, the light returned after the Iraqi Security Forces (ISF recaptured the region. In addition, we also found that the night-time light in the Kurdish Autonomous Region showed a steady decline after 2014, with the Arbil, Dihok, and As-Sulaymaniyah provinces losing 47%, 18%, and 31% of their night-time light between December 2013 and December 2016 as a result of the economic crisis in the region. The night-time light in Southern Iraq, the region controlled by Iraqi central government, has grown continuously; for example, the night-time light in Al Basrah increased by 75% between December 2013 and December 2017. Regions formerly controlled by ISIS experienced a return of night-time light during 2017 as the ISF retook almost all this territory in 2017. This indicates that as reconstruction began, electricity was re-supplied in these regions. Our analysis shows the night-time light in Iraq is directly linked to the socioeconomic dynamics of Iraq, and demonstrates that the VIIRS monthly night-time light images are an effective data source for tracking humanitarian disasters in that country.

  18. Night-eating syndrome and the severity of self-reported depressive symptoms from the Korea Nurses' Health Study: analysis of propensity score matching and ordinal regression.

    Science.gov (United States)

    Kim, O-S; Kim, M S; Lee, J E; Jung, H

    2016-12-01

    The prevalence of night-eating syndrome (NES) and depression is increasing worldwide. Although nurses, in particular, are exposed to work in an environment of irregular eating, shift work, and stressful settings, limited research exist. In fact, the prevalence of NES among Korean nurses has never been reported. The aim of this study was to determine the prevalence of NES as well as the association between NES and severity of self-reported depressive symptoms among South Korean female nurses. The Korea Nurses' Health Study, following the protocols of the Nurses' Health Study led by the Harvard University, collected data on Korean female nurses. Survey responses from 3617 participants were included, and 404 responses were analyzed in this cross-sectional study using propensity score matching. Descriptive, Spearman's and Cramer's correlations, propensity score matching, and multivariable ordinal logistic regression were conducted as statistical analysis. The prevalence of both NES and self-reported depressive symptoms among Korean female nurses were higher compared with nurses in prior studies. Nurses with NES were 1.65 times more likely to have greater severity of depressive symptoms than those without NES (95% confidence interval [1.19-2.10], odds ratio = 1.65) after adjusting for covariates including sociodemographic characteristics, health behavioural factors, and shift work. This study suggests significant association between NES and the severity of self-reported depressive symptoms among Korean female nurses after adjusting for covariates. Policy makers and hospital managers need to develop strategies to reduce depression and NES among nurses for enhancement of nurses' mental and physical health as well as for improvement of care quality. Copyright © 2016 The Royal Society for Public Health. Published by Elsevier Ltd. All rights reserved.

  19. Heart rate variability changes in physicians working on night call.

    Science.gov (United States)

    Malmberg, Birgitta; Persson, Roger; Flisberg, Per; Ørbaek, Palle

    2011-03-01

    Adverse effects by night-call duty have become an important occupational health issue. The aim of this study was to investigate whether the heart rate variability (HRV) differed during recovery from day work and night-call duty between distinct physician specialities. We studied the impact of a 16-h night-call duty on autonomic balance, measured by HRV, among two physician groups differing with respect to having to deal with life-threatening conditions while on call. Nineteen anaesthesiologists (ANEST) and 16 paediatricians and ear, nose and throat surgeons (PENT) were monitored by ambulatory digital Holter electrocardiogram (ECG). Heart rate variability was analysed between 21:00 and 22:00 after an ordinary workday, on night call and in the evening post-call. Absolute and normalized high-frequency power (HF, HFnu) were the main outcome variables, expressing parasympathetic influence on the heart. ANEST had lower HF power than PENT while on night call and post-daytime work (p work compared with post-night-call duty (p balance and did not differ between specialities. However, the less dynamic HRV after daytime work and during night-call duty in the ANEST group may indicate a higher physiological stress level. These results may contribute to the improvement of night-call schedules within the health care sector.

  20. Association of napping and night-time sleep with impaired glucose regulation, insulin resistance and glycated haemoglobin in Chinese middle-aged adults with no diabetes: a cross-sectional study.

    Science.gov (United States)

    Baoying, Huang; Hongjie, Chen; Changsheng, Qiu; Peijian, Wu; Qingfei, Lin; Yinghua, Lin; Huibin, Huang; Jixing, Liang; Liantao, Li; Ling, Chen; Kaka, Tang; Zichun, Chen; Lixiang, Lin; Jieli, Lu; Yufang, Bi; Guang, Ning; Penli, Zhu; Junping, Wen; Gang, Chen

    2014-07-23

    To assess associations between napping and night-time sleep duration with impaired glucose regulation, insulin resistance (IR) and glycated haemoglobin (HbA1c). Cross-sectional study. Fujian Province, China, from June 2011 to January 2012. This study enrolled 9028 participants aged 40-65 years. Data of 7568 participants with no diabetes were included for analysis. Type 2 diabetes was defined applying WHO criteria. Participants' daytime napping and night-time sleep duration data were collected using a standardised self-reported Chinese-language questionnaire about sleep frequency and quality. Anthropometric and laboratory parameters were also measured. IR was defined as a HOMA-IR index value >2.50. ORs and 95% CIs were derived from multivariate logistic regression models. Participants (mean age 51.1±7.0 years) included 3060 males and 4508 females with average night-time sleep of 7.9 h. A higher proportion of males napped than females. After adjustment for potential confounders, ORs for HbA1c >6.0% were 1.28 and 1.26 for those napping ≤1 h and >1 h (p=0.002 and p=0.018), respectively. Statistically significant differences in IR between nappers and non-nappers were only marginal clinically. Odds for HbA1c >6.0% were significantly lower in participants with longer night-time sleep durations than in the reference group (>8 h vs 6-8 h). Odds for IR were significantly lower in participants whose night-time sleep hours deviated from the reference group (8 h vs 6-8 h) Chinese middle-aged adults with no diabetes who napped had higher HbA1c and IR; those with shorter night-time sleep durations had increased HbA1c. Night-time sleep hours that are either 8 tend to be associated with lower odds for IR. Further studies are necessary to determine the underlying clinical significance and mechanisms behind these associations. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  1. Klokwerk + study protocol : An observational study to the effects of night-shift work on body weight and infection susceptibility and the mechanisms underlying these health effects

    NARCIS (Netherlands)

    Loef, Bette; van Baarle, Debbie; van der Beek, Allard J; van Kerkhof, Linda W; van de Langenberg, Daniëlla; Proper, Karin I

    2016-01-01

    BACKGROUND: Night-shift work may cause severe disturbances in the worker's circadian rhythm, which has been associated with the onset of health problems and diseases. As a substantial part of the workforce is exposed to night-shift work, harmful aspects of night-shift work should not be overlooked.

  2. Influence of Vehicle Speed on the Characteristics of Driver's Eye Movement at a Highway Tunnel Entrance during Day and Night Conditions: A Pilot Study.

    Science.gov (United States)

    Qin, Li; Dong, Li-Li; Xu, Wen-Hai; Zhang, Li-Dong; Leon, Arturo S

    2018-04-02

    The aim of this study was to investigate how vehicle speed influences the characteristics of driver's eye movement at highway tunnel entrances during day and night. In this study, six drivers' eye movement data (from 200 m before tunnel entrance to 200 m inside tunnel entrance) under five predetermined vehicle speeds (40, 50, 60, 70 and 80 km/h) in the daytime and three predetermined vehicle speeds (40, 60 and 80 km/h) in the nighttime were recorded using the non-intrusive Dikablis Professional eye-tracking system. Pupil size, the average fixation duration time and the average number of fixation were analyzed and then the influence of the vehicle speed on these parameters was evaluated by means of IBM SPSS Statistics 20.0. The results for pupil size in daytime increased when approaching the tunnel entrance, while as for nighttime, pupil size decreased when approaching the tunnel entrance and then increased after entering the tunnel. The pupil size in daytime has a significant negative correlation with vehicle speed, while the pupil size in nighttime did not show a significant association with vehicle speed. Furthermore, the average fixation duration in daytime increased when entering the tunnel, and had a significant negative correlation with vehicle speed. Also, the average number of fixations in daytime decreased when entering the tunnel and has a significant negative correlation with vehicle speed. However, the average fixation duration and the average number of fixations in nighttime did not show any significant association with vehicle speed. Moreover, limitations and future directions of the study are discussed for the further investigation.

  3. June 9-10, 2015: A case study of the Great Plains Low-Level Jet during PECAN (Plains Elevated Convection at Night)

    Science.gov (United States)

    Sullivan, Sharon M.

    Observations as part of the Plains Elevated Convection at Night (PECAN) campaign have allowed for an examination of the thermodynamic and dynamic structure of the LLJ using ground-based and airborne measurements in central Kansas. A shallow jet with wind speeds near 20 m s-1 formed during the nighttime hours on 10 June 2015. The University of Wyoming King Air research aircraft conducted two research flights beginning at sunset and ending near dawn, capturing the full evolution of the LLJ. Each flight included a series of vertical sawtooth maneuvers and isobaric legs along a fixed track at 38.7°N between 98.89°W and 100.3°W. This case featured classic signatures of the LLJ, including but not limited to the inertial oscillation of the ageostrophic wind. Forcing of the LLJ was analyzed using cross sections of D-values that allowed the vertical structure of the horizontal pressure gradient and hence thermal wind to be examined. A series of numerical simulations of the 10 June 2015 case study were made using the Weather Research and Forecasting (WRF) model to compare with observations. Output grids indicated that a temperature gradient of 6°C over 500 km was present between the surface and 850 hPa. Warmer temperatures were found to the west from the surface up to 600 hPa. The 600 hPa geostrophic winds were from the north. As a result, only weak southerly geostrophic winds were able to develop at the surface. The terrain-induced thermal wind was sufficiently large to overcome the adverse pressure gradient in the free atmosphere, but could only produce weak southerly geostrophic winds at the surface of about 11.4 m s-1.

  4. Night shift fatigue among anaesthesia trainees at a major metropolitan teaching hospital.

    Science.gov (United States)

    Lancman, B M

    2016-05-01

    Night shifts expose anaesthesia trainees to the risk of fatigue and, potentially, fatigue-related performance impairment. This study examined the workload, fatigue and coping strategies of anaesthesia trainees during night shifts. A blinded survey-based study was undertaken at a major single centre metropolitan teaching hospital in Australia. All ten anaesthesia trainees who worked night shifts participated. The survey collected data on duration of night shifts, workload, and sleep patterns. Fatigue was assessed using the Karolinska Sleepiness Scale (KSS). There were 93 night shifts generating data out of a potential 165. Trainees tended to sleep an increasing amount before their shift as the nights progressed from 1 to 5. Night 1 was identified as an 'at risk' night due to the amount of time spent awake before arriving at work (32% awake for U+003E8 hours); on all other nights trainees were most likely to have slept 6-8 hours. The KSS demonstrated an increase in sleepiness of 3 to 4 points on the scale from commencement to conclusion of a night shift. The Night 1 conclusion sleepiness was markedly worse than any other night with 42% falling into an 'at-risk' category. The findings demonstrate fatigue and inadequate sleep in anaesthesia trainees during night shifts in a major metropolitan teaching hospital. The data obtained may help administrators prepare safer rosters, and junior staff develop improved strategies to reduce the likelihood of fatigue.

  5. A night with good vibrations

    CERN Multimedia

    2002-01-01

    For its third edition, the Museum d'histoire des sciences invites you to a Science Night under the banner of waves and undulations. Scientists, artists and storytellers from more than forty institutes and local or regional associations will show in only one weekend that waves and undulations form an integral part of our daily environment. Telephones, televisions, radios, irons, lighting, music, sun rays, stars, rainbows, earthquakes and other natural phenomena - all produce, emit or receive waves or undulations. The visitors attending the Night will be able to get in contact with the nature of waves through interactive exhibitions on sound and light and through hands-on demonstrations arranged around the Bartholoni villa and in the Park of the Perle du lac. An amusing and distracting way to familiarize yourself with the concepts of wavelength, frequency and interference lengths... In addition to the stands, the Night will offer many other activities: reconstructions of critical experiments, scientific consu...

  6. A night with good vibrations

    CERN Multimedia

    2002-01-01

    Next week-end, the Geneva Science History Museum invites you to a Science Night under the banner of waves and vibrations. Scientists, artists and storytellers from more than forty institutes and local or regional associations will show that waves and vibrations form an integral part of our environment. You will be able to get in contact with the nature of waves through interactive exhibitions on sound and light and through hands-on demonstrations arranged in the Park of the Perle du Lac. On the CERN stand, you will be able to measure the speed of light with a bar of chocolate, and understand the scattering of waves with plastic ducks. Amazing, no? In addition to the stands, the Night will offer many other activities: reconstructions of experiments, a play, a concert of crystal glasses, an illuminated fountain, a house of spirits. More information Science Night, 6 and 7 July, Park of the Perle du Lac, Geneva

  7. "Chrono-functional milk": The difference between melatonin concentrations in night-milk versus day-milk under different night illumination conditions.

    Science.gov (United States)

    Asher, A; Shabtay, A; Brosh, A; Eitam, H; Agmon, R; Cohen-Zinder, M; Zubidat, A E; Haim, A

    2015-01-01

    Pineal melatonin (MLT) is produced at highest levels during the night, under dark conditions. We evaluated differences in MLT-concentration by comparing daytime versus night time milk samples, from two dairy farms with different night illumination conditions: (1) natural dark (Dark-Night); (2) short wavelength Artificial Light at Night (ALAN, Night-Illuminated). Samples were collected from 14 Israeli Holstein cows from each commercial dairy farm at 04:30 h ("Night-milk") 12:30 h ("Day-milk") and analyzed for MLT-concentration. In order to study the effects of night illumination conditions on cows circadian rhythms, Heart Rate (HR) daily rhythms were recorded. MLT-concentrations of Night-milk samples from the dark-night group were significantly (p Night-illuminated conditions (30.70 ± 1.79 and 17.81 ± 0.33 pg/ml, respectively). Interestingly, night illumination conditions also affected melatonin concentrations at daytime where under Dark-Night conditions values are significantly (p Night-Illuminated conditions, (5.36 ± 0.33 and 3.30 ± 0.18 pg/ml, respectively). There were no significant differences between the two treatments in the milk yield and milk composition except somatic cell count (SCC), which was significantly lower (p = 0.02) in the Dark-Night group compared with the Night-Illuminated group. Cows in both groups presented a significant (p night illuminated cows feeding and milking time are the "time keeper", while in the Dark-night cows, HR rhythms were entrained by the light/dark cycle. The higher MLT-concentration in Dark-night cows with the lower SCC values calls upon farmers to avoid exposure of cows to ALAN. Therefore, under Dark-night conditions milk quality will improve by lowering SCC values where separation between night and day of such milk can produce chrono-functional milk, naturally rich with MLT.

  8. The impact of meal timing on performance, sleepiness, gastric upset, and hunger during simulated night shift.

    Science.gov (United States)

    Grant, Crystal Leigh; Dorrian, Jillian; Coates, Alison Maree; Pajcin, Maja; Kennaway, David John; Wittert, Gary Allen; Heilbronn, Leonie Kaye; Vedova, Chris Della; Gupta, Charlotte Cecilia; Banks, Siobhan

    2017-10-07

    This study examined the impact of eating during simulated night shift on performance and subjective complaints. Subjects were randomized to eating at night (n=5; 23.2 ± 5.5 y) or not eating at night (n=5; 26.2 ± 6.4 y). All participants were given one sleep opportunity of 8 h (22:00 h-06:00 h) before transitioning to the night shift protocol. During the four days of simulated night shift participants were awake from 16:00 h-10:00 h with a daytime sleep of 6 h (10:00 h-16:00 h). In the simulated night shift protocol, meals were provided at ≈0700 h, 1900 h and 0130 h (eating at night); or ≈0700 h, 0930 h, 1410 h and 1900 h (not eating at night). Subjects completed sleepiness, hunger and gastric complaint scales, a Digit Symbol Substitution Task and a 10-min Psychomotor Vigilance Task. Increased sleepiness and performance impairment was evident in both conditions at 0400 h (phunger and a small but significant elevation in stomach upset across the night (p<0.026). Eating at night was associated with elevated bloating on night one, which decreased across the protocol. Restricting food intake may limit performance impairments at night. Dietary recommendations to improve night-shift performance must also consider worker comfort.

  9. Determinants of day-night difference in blood pressure, a comparison with determinants of daytime and night-time blood pressure.

    Science.gov (United States)

    Musameh, M D; Nelson, C P; Gracey, J; Tobin, M; Tomaszewski, M; Samani, N J

    2017-01-01

    Blunted day-night difference in blood pressure (BP) is an independent cardiovascular risk factor, although there is limited information on determinants of diurnal variation in BP. We investigated determinants of day-night difference in systolic (SBP) and diastolic (DBP) BP and how these compared with determinants of daytime and night-time SBP and DBP. We analysed the association of mean daytime, mean night-time and mean day-night difference (defined as (mean daytime-mean night-time)/mean daytime) in SBP and DBP with clinical, lifestyle and biochemical parameters from 1562 adult individuals (mean age 38.6) from 509 nuclear families recruited in the GRAPHIC Study. We estimated the heritability of the various BP phenotypes. In multivariate analysis, there were significant associations of age, sex, markers of adiposity (body mass index and waist-hip ratio), plasma lipids (total and low-density lipoprotein cholesterol and triglycerides), serum uric acid, alcohol intake and current smoking status on daytime or night-time SBP and/or DBP. Of these, only age (P=4.7 × 10 -5 ), total cholesterol (P=0.002), plasma triglycerides (P=0.006) and current smoking (P=3.8 × 10 -9 ) associated with day-night difference in SBP, and age (P=0.001), plasma triglyceride (P=2.2 × 10 -5 ) and current smoking (3.8 × 10 -4 ) associated with day-night difference in DBP. 24-h, daytime and night-time SBP and DBP showed substantial heritability (ranging from 18-43%). In contrast day-night difference in SBP showed a lower heritability (13%) while heritability of day-night difference in DBP was not significant. These data suggest that specific clinical, lifestyle and biochemical factors contribute to inter-individual variation in daytime, night-time and day-night differences in SBP and DBP. Variation in day-night differences in BP is largely non-genetic.

  10. The Mythology of the Night Sky

    Science.gov (United States)

    Falkner, David E.

    The word "planet" comes from the Latin word planeta and the Greek word planes, which means "wanderer." When the ancient Greeks studied the night sky they noticed that most of the stars remained in the same position relative to all the other stars, but a few stars seem to move in the sky from day to day, week to week, and month to month. The Greeks called these rogue stars "wanderers" because they wandered through the starry background.

  11. Light at Night and Breast Cancer Risk Among California Teachers

    Science.gov (United States)

    Hurley, Susan; Goldberg, Debbie; Nelson, David; Hertz, Andrew; Horn-Ross, Pamela L.; Bernstein, Leslie; Reynolds, Peggy

    2014-01-01

    Background There is convincing evidence that circadian disruption mediated by exposure to light at night promotes mammary carcinogenesis in rodents. The role that light at night plays in human breast cancer etiology remains unknown. We evaluated the relationship between estimates of indoor and outdoor light at night and the risk of breast cancer among members of the California Teachers Study. Methods Indoor light-at-night estimates were based on questionnaire data regarding sleep habits and use of night time lighting while sleeping. Estimates of outdoor light at night were derived from imagery data obtained from the U.S. Defense Meteorological Satellite Program assigned to geocoded addresses of study participants. Analyses were conducted among 106,731 California Teachers Study members who lived in California, had no prior history of breast cancer, and provided information on lighting while sleeping. 5,095 cases of invasive breast cancer diagnosed 1995–2010 were identified via linkage to the California Cancer Registry. We used age-stratified Cox proportional hazard models to calculate hazard ratios (HRs) with 95% confidence intervals (CIs), adjusting for breast cancer risk factors and neighborhood urbanization and socioeconomic class. Results An increased risk was found for women living in areas with the highest quintile of outdoor light at night exposure estimates (HR=1.12 [95% CI=1.00 – 1.26], test for trend, P=0.06). While more pronounced among premenopausal women (HR=1.34 [95% CI=1.07 – 1.69], test for trend, P=0.04), the associations did not differ statistically by menopausal status (test for interaction, P=0.34). Conclusions Women living in areas with high levels of ambient light at night may be at an increased risk of breast cancer. Future studies that integrate quantitative measurements of indoor and outdoor light at night are warranted. PMID:25061924

  12. Dose-dependent responses of avian daily rhythms to artificial light at night

    NARCIS (Netherlands)

    Jong, de M.; Jeninga, L.; Ouyang, J.Q.; Oers, van K.; Spoelstra, K.; Visser, M.E.

    2016-01-01

    Recent studies have shown that animals are affected by night-time light exposure. Light is a continuous variable, but our knowledge on how individuals react to different light intensities during the night is limited. We therefore determined the relationship between night light intensity and the

  13. Dose-dependent responses of avian daily rhythms to artificial light at night

    NARCIS (Netherlands)

    De Jong, M.; Jeninga, L.; Ouyang, Jenny; van Oers, K.; Spoelstra, K.; Visser, M.E.

    2016-01-01

    Recent studies have shown that animals are affected by night-time light exposure. Light is a continuous variable, but our knowledge on how individuals react to different light intensities during the night is limited. We therefore determined the relationship between night light intensity and the

  14. Dose-dependent responses of avian daily rhythms to artificial light at night

    NARCIS (Netherlands)

    de Jong, Maaike; Jeninga, Lizanne; Ouyang, Jenny Q; van Oers, Kees; Spoelstra, Kamiel; Visser, Marcel E

    2015-01-01

    Recent studies have shown that animals are affected by night-time light exposure. Light is a continuous variable, but our knowledge on how individuals react to different light intensities during the night is limited. We therefore determined the relationship between night light intensity and the

  15. The volunteer programme ‘Night Ravens’:

    DEFF Research Database (Denmark)

    Larsen, Britt Østergaard; Kleif, Helle Bendix; Kolodziejczyk, Christophe

    2015-01-01

    The volunteer programme ‘Night Ravens’ (NR) was founded in Sweden in 1987 and has, over the years, developed into a Scandinavian concept covering large areas of Sweden, Denmark, Norway, Greenland and the Faroe Islands. The NR programme is a crime prevention initiative with adults walking...... the streets at night in identifiable ‘uniforms’ in areas with high activity. The purpose of this study is to evaluate the effects of the NR programme in Denmark based on a volunteer set-up with a less intrusive approach to situational crime prevention than, for instance, hot spot policing. The analyses...... are based on a longitudinal data set containing socio-demographic information on all 585 postcode districts in Denmark and quarterly records of six different categories of reported crimes in the years 2001–2010.We apply a difference-in-difference design and compare development in crime rates in districts...

  16. Students' educational experiences and interaction with residents on night shifts.

    Science.gov (United States)

    Schiller, Jocelyn; Sokoloff, Max; Tendhar, Chosang; Schmidt, John; Christner, Jennifer

    2017-08-01

    The purpose of this mixed-methods study was to investigate whether increased night shifts for students on paediatric rotations had any negative impact on their overall quality of educational experiences in light of the implementation of duty-hour restrictions. Both quantitative and qualitative data were collected from 30 students on paediatric rotations during the academic year 2011/12. Students completed two questionnaires, one in response to their experiences during the day shifts and another in response to their experiences during the night shifts. Only 25 cases were retained for the final analyses. The non-parametric Wilcoxon signed-rank test was used to analyse the quantitative data, and constant comparative thematic analyses, as described by Creswell, were used to analyse the qualitative data. [Do] increased nights shifts for students … [have] any negative impact on their overall quality of educational experiences[?] RESULTS: The results indicated that students' perceived quality of experiences during the night shifts was greater, compared with their day shifts. Students reported having more time to socialise during the night shifts. They further reported that informal ways of learning, such as impromptu teaching and spontaneous discussions on clinical problems, were more beneficial, and these often occurred in abundance during the night shifts as opposed to the scheduled didactic teaching sessions that occur during the day shifts. This study documented many unanticipated benefits of night shifts. The feeling of cohesiveness of the night team deserves further exploration, as this can be linked to better performance outcomes. More consideration should be given to implementing night shifts as a regular feature of clerkships. © 2016 John Wiley & Sons Ltd and The Association for the Study of Medical Education.

  17. Progress in color night vision

    NARCIS (Netherlands)

    Toet, A.; Hogervorst, M.A.

    2012-01-01

    We present an overview of our recent progress and the current state-of-the-art techniques of color image fusion for night vision applications. Inspired by previously developed color opponent fusing schemes, we initially developed a simple pixel-based false color-mapping scheme that yielded fused

  18. Volunteers for Researchers’ Night wanted

    CERN Multimedia

    Katarina Anthony

    2015-01-01

    Every year, on the last Friday of September, the European Researchers’ Night (see here) takes place in about 300 cities all over Europe - promoting research in engaging and fun ways for the general public. This year, CERN will be participating once again, hosting dozens of events across the Balexert shopping centre – and we’ll need YOUR help to make the celebration a success.   From film screenings and celebrity Q&A sessions to “Ask a Researcher” and build-your-own LEGO LHC events, this year’s Researchers’ Night is going to be jam-packed! The fun will kick off prior to the night itself with a mock-up of the LHC tunnel installed in the central court of the Balexert shopping centre, 8-12 September*. CERN people will be on hand to speak to shoppers about the LHC, and to encourage them to participate in Researchers’ Night! The CERN organisers are recruiting volunteers and support staff for Researchers’ ...

  19. Shift work with and without night work as a risk factor for fatigue and changes in sleep length: A cohort study with linkage to records on daily working hours.

    Science.gov (United States)

    Härmä, Mikko; Karhula, Kati; Puttonen, Sampsa; Ropponen, Annina; Koskinen, Aki; Ojajärvi, Anneli; Kivimäki, Mika

    2018-01-31

    We examined shift work with or without night work as a risk factor for fatigue and short or long sleep. In a prospective cohort study with 4- and 6-year follow-ups (the Finnish Public Sector study), we linked survey responses of 3,679 full-time hospital employees on sleep duration and fatigue to records on daily working hours in 2008 (baseline), 2012 and 2014. We used logistic regression to estimate risk ratios and their confidence intervals to examine whether continuous exposure to shift work or changes between shift work and day work were associated with short (≤6.5 hr) or long (≥9.0 hr) sleep over 24 hr and fatigue at work and during free days. Compared with continuous day work and adjusting for age, gender, education and fatigue/sleep duration at baseline, continuous shift work with night shifts was associated with increased fatigue during free days (risk ratio = 1.38, 95% confidence interval 1.17-1.63) and long sleep (risk ratio = 8.04, 95% confidence interval 2.88-22.5, without adjustment for education) after 6-year follow-up. Exposure to shift work without night shifts increased only long sleep after 6 years (risk ratio = 5.87, 95% confidence interval 1.94-17.8). A change from day work to shift work with or without night shifts was associated with an increased risk for long sleep, and a change from shift work to day work with a decreased risk for long sleep and fatigue. This study suggests that irregular shift work is a modifiable risk factor for long sleep and increased fatigue, probably reflecting a higher need for recovery. © 2018 European Sleep Research Society.

  20. Experimental Assessment of Mechanical Night Ventilation on Inner Wall Surfaces

    DEFF Research Database (Denmark)

    Ji, Wenhui; Heiselberg, Per Kvols; Wang, Houhua

    2016-01-01

    The cooling potential of night ventilation largely depends on the heat exchange at the internal room surfaces. During night time, increased heat transfer on a vertical wall is expected due to cool supply air that flows along the internal wall surface from the top of the wall. This paper presents ...... an experimental study of the cooling of wall surfaces in a test room by mechanical night-time ventilation. Significant improvement of indoor thermal environment is presented resulting from the enhanced internal convection heat transfer....

  1. Night Shift Work and Risk of Breast Cancer.

    Science.gov (United States)

    Hansen, Johnni

    2017-09-01

    Night work is increasingly common and a necessity in certain sectors of the modern 24-h society. The embedded exposure to light-at-night, which suppresses the nocturnal hormone melatonin with oncostatic properties and circadian disruption, i.e., misalignment between internal and external night and between cells and organs, are suggested as main mechanisms involved in carcinogenesis. In 2007, the International Agency for Research on Cancer (IARC) classified shift work that involves circadian disruption as probably carcinogenic to humans based on limited evidence from eight epidemiologic studies on breast cancer, in addition to sufficient evidence from animal experiments. The aim of this review is a critical update of the IARC evaluation, including subsequent and the most recent epidemiologic evidence on breast cancer risk after night work. After 2007, in total nine new case-control studies, one case-cohort study, and eight cohort studies are published, which triples the number of studies. Further, two previous cohorts have been updated with extended follow-up. The assessment of night shift work is different in all of the 26 existing studies. There is some evidence that high number of consecutive night shifts has impact on the extent of circadian disruption, and thereby increased breast cancer risk, but this information is missing in almost all cohort studies. This in combination with short-term follow-up of aging cohorts may explain why some cohort studies may have null findings. The more recent case-control studies have contributed interesting results concerning breast cancer subtypes in relation to both menopausal status and different hormonal subtypes. The large differences in definitions of both exposure and outcome may contribute to the observed heterogeneity of results from studies of night work and breast cancer, which overall points in the direction of an increased breast cancer risk, in particular after over 20 years of night shifts. Overall, there is a

  2. Recent progress on RE2O3-Mo/W emission materials.

    Science.gov (United States)

    Wang, Jinshu; Zhang, Xizhu; Liu, Wei; Cui, Yuntao; Wang, Yiman; Zhou, Meiling

    2012-08-01

    RE2O3-Mo/W cathodes were prepared by powder metallurgy method. La2O3-Y2O3-Mo cermet cathodes prepared by traditional sintering method and spark plasma sintering (SPS) exhibit different secondary emission properties. The La2O3-Y2O3-Mo cermet cathode prepared by SPS method has smaller grain size and exhibits better secondary emission performance. Monte carlo calculation results indicate that the secondary electron emission way of the cathode correlates with the grain size. Decreasing the grain size can decrease the positive charging effect of RE2O3 and thus is favorable for the escaping of secondary electrons to vacuum. The Scandia doped tungsten matrix dispenser cathode with a sub-micrometer microstructure of matrix with uniformly distributed nanometer-particles of Scandia has good thermionic emission property. Over 100 A/cm2 full space charge limited current density can be obtained at 950Cb. The cathode surface is covered by a Ba-Sc-O active surface layer with nano-particles distributing mainly on growth steps of W grains, leads to the conspicuous emission property of the cathode.

  3. Agomelatine Efficacy in the Night Eating Syndrome

    Directory of Open Access Journals (Sweden)

    Walter Milano

    2013-01-01

    Full Text Available Night eating syndrome (NES is a nosographic entity included among the forms not otherwise specified (EDNOS in eating disorders (ED of the DSM IV. It is characterized by a reduced food intake during the day, evening hyperphagia, and nocturnal awakenings associated with conscious episodes of compulsive ingestion of food. Frequently, NES patients show significant psychopathology comorbidity with affective disorders. This paper describes a case report of an NES patient treated with agomelatine, an antidepressant analogue of melatonin, which acts by improving not only the mood but also by regulating sleep cycles and appetite. After three months of observation, the use of Agomelatine not only improved the mood of our NES patient (assessed in the HAM-D scores but it was also able to reduce the night eating questionnaire, by both reducing the number of nocturnal awakenings with food intake, the time of snoring, the minutes of movement during night sleep (assessed at polysomnography, and the weight (−5.5 kg and optimizing blood glucose and lipid profile. In our clinical case report, agomelatine was able both to reduce the NES symptoms and to significantly improve the mood of our NES patient without adverse side effects during the duration of treatment. Therefore, our case report supports the rationale for further studies on the use of Agomelatine in the NES treatment.

  4. Persepsi Wisatawan Terhadap Night Life Attraction

    Directory of Open Access Journals (Sweden)

    Hary Hermawan

    2017-04-01

    ABSTRACT Cabaret is a term performances of music, comedy, dance, drama, and other special mix of art perfomed by men who dressed in women (ladyboy on stage. Cabaret performances in Oyot Godhong Restaurant intended as new tourist attraction that is expected to increase the interest of tourists to visit Malioboro in Yogyakarta, especially to Oyot Godhong Restaurants. Based descriptive study shows that the characteristics travelers who viewed Kabaret show is very diverse, each of which has perceptions and motivations are different. Cabaret performances have qualified to become the cultural attractions are staged at night (night atraction in the city of Yogyakarta. Based on traveler perception indicates that the cabaret performances have beauty or aesthetics, uniqueness, and values that match the criteria criteria of the standard as a tourist attraction. Performances Cabaret in Oyot Godhong Restaurants able to increase the sale value. Oyot Godhong Restaurants previously only form of tourism facilities (amenities, but is now a restaurant that has a tourist attraction (atraction.   Keywords: Cabaret show, night life attractions, tourism attraction, tourists perception, tourism marketing

  5. Ad libitum and restricted day and night sleep architecture.

    Science.gov (United States)

    Korompeli, Anna St; Muurlink, Olav; Gavala, Alexandra; Myrianthefs, Pavlos; Fildissis, Georgios; Baltopoulos, Georgios

    2016-01-01

    This study represents a first controlled comparison of restricted versus unrestricted sleep in both day and night sleep categories. A repeated measures study of a homogenous group of young women without sleep disorders (n=14) found that stage 1, 2, 3 and REM sleep, as well as sleep latency were not statistically different between day ad libitum sleep (DAL) and day interrupted (DI) sleep categories, while night interrupted (NI) and ad libitum (NAL) sleep showed strikingly different architecture.

  6. Perception of intoxication in a field study of the night-time economy: Blood alcohol concentration, patron characteristics, and event-level predictors.

    Science.gov (United States)

    Kaestle, Christine E; Droste, Nicolas; Peacock, Amy; Bruno, Raimondo; Miller, Peter

    2018-01-01

    Determine the relationship of subjective intoxication to blood alcohol concentration (BAC) and examine whether patron and event-level characteristics modify the relationship of BAC to subjective intoxication. An in-situ systematic random sample of alcohol consumers attending night-time entertainment districts between 10pm and 3am on Friday and Saturday nights in five Australian cities completed a brief interview (n=4628). Participants reported age, sex, and pre-drinking, energy drink, tobacco, illicit stimulant and other illicit drug use that night, and their subjective intoxication and BAC were assessed. Male and female drinkers displayed equally low sensitivity to the impact of alcohol consumption when self-assessing their intoxication (BAC only explained 19% of variance). The marginal effect of BAC was not constant. At low BAC, participants were somewhat sensitive to increases in alcohol consumption, but at higher BAC levels that modest sensitivity dissipated (actual BAC had less impact on self-assessed intoxication). The slope ultimately leveled out to be non-responsive to additional alcohol intake. Staying out late, pre-drinking, and being young introduced biases resulting in higher self-assessed intoxication regardless of actual BAC. Further, both energy drinks and stimulant use modified the association between BAC and perceived intoxication, resulting in more compressed changes in self-assessment as BAC varies up or down, indicating less ability to perceive differences in BAC level. The ability of intoxicated patrons to detect further intoxication is impaired. Co-consumption of energy drinks and/or stimulant drugs is associated with impaired intoxication judgment, creating an additional challenge for the responsible service and consumption of alcohol. Copyright © 2017 Elsevier Ltd. All rights reserved.

  7. Associations between number of consecutive night shifts and impairment of neurobehavioral performance during a subsequent simulated night shift.

    Science.gov (United States)

    Magee, Michelle; Sletten, Tracey L; Ferguson, Sally A; Grunstein, Ronald R; Anderson, Clare; Kennaway, David J; Lockley, Steven W; Rajaratnam, Shantha Mw

    2016-05-01

    This study aimed to investigate sleep and circadian phase in the relationships between neurobehavioral performance and the number of consecutive shifts worked. Thirty-four shift workers [20 men, mean age 31.8 (SD 10.9) years] worked 2-7 consecutive night shifts immediately prior to a laboratory-based, simulated night shift. For 7 days prior, participants worked their usual shift sequence, and sleep was assessed with logs and actigraphy. Participants completed a 10-minute auditory psychomotor vigilance task (PVT) at the start (~21:00 hours) and end (~07:00 hours) of the simulated night shift. Mean reaction times (RT), number of lapses and RT distribution was compared between those who worked 2-3 consecutive night shifts versus those who worked 4-7 shifts. Following 4-7 shifts, night shift workers had significantly longer mean RT at the start and end of shift, compared to those who worked 2-3 shifts. The slowest and fastest 10% RT were significantly slower at the start, but not end, of shift among participants who worked 4-7 nights. Those working 4-7 nights also demonstrated a broader RT distribution at the start and end of shift and had significantly slower RT based on cumulative distribution analysis (5 (th), 25 (th), 50 (th), 75 (th)percentiles at the start of shift; 75th percentile at the end of shift). No group differences in sleep parameters were found for 7 days and 24 hours prior to the simulated night shift. A greater number of consecutive night shifts has a negative impact on neurobehavioral performance, likely due to cognitive slowing.

  8. Hot Flashes amd Night Sweats (PDQ)

    Science.gov (United States)

    ... Professionals Questions to Ask about Your Treatment Research Hot Flashes and Night Sweats (PDQ®)–Patient Version Overview ... quality of life in many patients with cancer. Hot flashes and night sweats may be side effects ...

  9. Thermal expansion and conductivity of RE2Sn2O7 (RE = La, Nd, Sm, Gd, Er and Yb) pyrochlores

    International Nuclear Information System (INIS)

    Feng, J.; Xiao, B.; Zhou, R.; Pan, W.

    2013-01-01

    Graphical abstract: Calculated cohesive energies and formation enthalpies of RE 2 Sn 2 O 7 compounds. The formation enthalpies at 298 K are more close to the experimental values. -- The calculated cohesive energies and formation enthalpies of Rare earth stannate (RE 2 Sn 2 O 7 ) compounds are in good agreement with the corresponding experimental values. The thermal expansion coefficients (TECs) of rare earth stannates are 7–9 × 10 −6 K −1 at high temperature. The results show that local spin density approximation predicts smaller TECs than the real values. The computed thermal conductivity of RE 2 Sn 2 O 7 is 1.8–2.5 W (m · K) −1 at 1273 K using the Slack–Clarke model, indicating that RE 2 Sn 2 O 7 compounds exhibit good thermal insulating properties at high temperature

  10. White Nights rebuts Pravda claims

    International Nuclear Information System (INIS)

    Anon.

    1992-01-01

    This paper reports that another Russo-foreign joint venture under attack in the Moscow press has denied charges of impropriety and mismanagement in its operations. The White Nights joint venture last month came under scathing attack from Moscow newspaper Pravda, which alleged the venture has reneged on its promises, is virtually bankrupt, and mistreats Russian employees. White Nights is a joint venture owned 50% by Varyeganneftegaz (VNG), a Russian oil and gas enterprise, and 50% by Salomon Inc. unit Phibro Energy Inc., Greenwich, Conn., and Anglo-Suisse (U.S.S.R.) Ltd., a subsidiary of Anglo-Suisse Inc., Houston. The venture started operations Apr. 1, 1991, with a program of workovers, redevelopment, and horizontal wells in West Varyegan and Tagrinsk oil fields in western Siberia

  11. Disruption of Circadian Rhythms by Light During Day and Night.

    Science.gov (United States)

    Figueiro, Mariana G

    2017-06-01

    This study aims to discuss possible reasons why research to date has not forged direct links between light at night, acute melatonin suppression or circadian disruption, and risks for disease. Data suggest that irregular light-dark patterns or light exposures at the wrong circadian time can lead to circadian disruption and disease risks. However, there remains an urgent need to: (1) specify light stimulus in terms of circadian rather than visual response; (2) when translating research from animals to humans, consider species-specific spectral and absolute sensitivities to light; (3) relate the characteristics of photometric measurement of light at night to the operational characteristics of the circadian system; and (4) examine how humans may be experiencing too little daytime light, not just too much light at night. To understand the health effects of light-induced circadian disruption, we need to measure and control light stimulus during the day and at night.

  12. Do Wild Great Tits Avoid Exposure to Light at Night?

    Directory of Open Access Journals (Sweden)

    Maaike de Jong

    Full Text Available Studies of wild populations have provided important insights into the effects of artificial light at night on organisms, populations and ecosystems. However, in most studies the exact amount of light at night individuals are exposed to remains unknown. Individuals can potentially control their nighttime light exposure by seeking dark spots within illuminated areas. This uncertainty makes it difficult to attribute effects to a direct effect of light at night, or to indirect effects, e.g., via an effect of light at night on food availability. In this study, we aim to quantify the nocturnal light exposure of wild birds in a previously dark forest-edge habitat, experimentally illuminated with three different colors of street lighting, in comparison to a dark control. During two consecutive breeding seasons, we deployed male great tits (Parus major with a light logger measuring light intensity every five minutes over a 24h period. We found that three males from pairs breeding in brightly illuminated nest boxes close to green and red lamp posts, were not exposed to more artificial light at night than males from pairs breeding further away. This suggests, based on our limited sample size, that these males could have been avoiding light at night by choosing a roosting place with a reduced light intensity. Therefore, effects of light at night previously reported for this species in our experimental set-up might be indirect. In contrast to urban areas where light is omnipresent, bird species in non-urban areas may evade exposure to nocturnal artificial light, thereby avoiding direct consequences of light at night.

  13. Nature of the tensor order in Cd2Re2O7

    Science.gov (United States)

    Di Matteo, S.; Norman, M. R.

    2017-09-01

    The pyrochlore metal Cd2Re2O7 has been recently investigated by second-harmonic generation (SHG) reflectivity. In this paper, we develop a general formalism that allows for the identification of the relevant tensor components of the SHG from azimuthal scans. We demonstrate that the secondary order parameter identified by SHG at the structural phase transition is the x2-y2 component of the axial toroidal quadrupole. This differs from the 3 z2-r2 symmetry of the atomic displacements associated with the I 4 ¯m 2 crystal structure that was previously thought to be its origin. Within the same formalism, we suggest that the primary order parameter detected in the SHG experiment is the 3 z2-r2 component of the magnetic quadrupole. We discuss the general mechanism driving the phase transition in our proposed framework, and suggest experiments, particularly resonant x-ray scattering ones, that could clarify this issue.

  14. Night Work and the Risk of Depression.

    Science.gov (United States)

    Angerer, Peter; Schmook, Renate; Elfantel, Irina; Li, Jian

    2017-07-16

    Working the night shift interferes with the circadian chronobiological rhythm, causing sleep disturbances, fatigue, and diminished wellbeing, and increases the risk of serious disease. The question whether night work increases the risk of depression has not been adequately studied to date. We carried out a systematic, broadly conceived literature search in the PubMed, Scopus, PsycINFO, and PSYNDEX databases and the Medpilot search portal on the topic of nighttime shift work and mental illness. The search yielded 5682 hits, which were narrowed down by predefined selection criteria to 11 high-quality longitudinal studies on the relationship between nighttime shift work and depressive illness. Only these 11 studies were subjected to further analysis. 3 of 4 studies on nighttime shift work in the health professions (almost exclusively nursing) revealed no association with depression over an observation period of two years. On the other hand, 5 studies on nighttime shift work in occupations outside the health sector, with observation periods of two or more years, yielded evidence of an elevated risk of depression after several years of nighttime shift work, but not in any uniform pattern. A supplementary meta-analysis of 5 of the studies revealed a 42% increase of the risk of depression among persons working the night shift (95% confidence interval [0.92; 2.19]). Psychosocial working conditions that have a negative influence on health partially account for these associations. Although there is evidence that nighttime shift work (at least, in occupations outside the health sector) does increase the risk of depression, this evidence is not strong enough to sustain a general medical recommendation against shift work for employees with depressive conditions. It would seem appropriate to address this question on an individual basis, with strong support from physicians and close attention to the deleterious psychosocial factors associated with shift work.

  15. Night shift decreases cognitive performance of ICU physicians.

    Science.gov (United States)

    Maltese, François; Adda, Mélanie; Bablon, Amandine; Hraeich, Sami; Guervilly, Christophe; Lehingue, Samuel; Wiramus, Sandrine; Leone, Marc; Martin, Claude; Vialet, Renaud; Thirion, Xavier; Roch, Antoine; Forel, Jean-Marie; Papazian, Laurent

    2016-03-01

    The relationship between tiredness and the risk of medical errors is now commonly accepted. The main objective of this study was to assess the impact of an intensive care unit (ICU) night shift on the cognitive performance of a group of intensivists. The influence of professional experience and the amount of sleep on cognitive performance was also investigated. A total of 51 intensivists from three ICUs (24 seniors and 27 residents) were included. The study participants were evaluated after a night of rest and after a night shift according to a randomized order. Four cognitive skills were tested according to the Wechsler Adult Intelligence Scale and the Wisconsin Card Sorting Test. All cognitive abilities worsened after a night shift: working memory capacity (11.3 ± 0.3 vs. 9.4 ± 0.3; p night shift. The cognitive abilities of intensivists were significantly altered following a night shift in the ICU, regardless of either the amount of professional experience or the duration of sleep during the shift. The consequences for patients' safety and physicians' health should be further evaluated.

  16. Patient Handoffs: Is Cross Cover or Night Shift Better?

    Science.gov (United States)

    Higgins, Alanna; Brannen, Melissa L; Heiman, Heather L; Adler, Mark D

    2017-06-01

    Studies show singular handoffs between health care providers to be risky. Few describe sequential handoffs or compare handoffs from different provider types. We investigated the transfer of information across 2 handoffs using a piloted survey instrument. We compared cross-cover (every fourth night call) with dedicated night-shift residents. Surveys assessing provider knowledge of hospitalized patients were administered to pediatric residents. Primary teams were surveyed about their handoff upon completion of daytime coverage of a patient. Night-shift or cross-covering residents were surveyed about their handoff of the same patient upon completion of overnight coverage. Pediatric hospitalists rated the consistency of information between the surveys. Absolute difference was calculated between the 2 providers' rating of a patient's (a) complexity and (b) illness severity. Scores were compared across provider type. Fifty-nine complete handoff pairs were obtained. Fourteen and 45 handoff surveys were completed by a cross-covering and a night-shift provider, respectively. There was no significant difference in information consistency between primary and night-shift (median, 4.0; interquartile range [IQR], 3-4) versus primary and cross-covering providers (median, 4.0; IQR, 3-4). There was no significant difference in median patient complexity ratings (night shift, 3.0; IQR, 1-5, versus cross cover, 3.5; IQR, 1-5) or illness severity ratings (night shift, 2.0; IQR, 1-4, versus cross-cover, 3.0; IQR, 1-6) when comparing provider types giving a handoff. We did not find a difference in physicians' transfer of information during 2 handoffs among providers taking traditional call or on night shift. Development of tools to measure handoff consistency is needed.

  17. [Night work, shift work: Breast cancer risk factor?].

    Science.gov (United States)

    Benabu, J-C; Stoll, F; Gonzalez, M; Mathelin, C

    2015-12-01

    The aim of this review was to determine the link between night/shift work and breast cancer. The analysed articles were taken from the PUBMED database between 1996 and 2015. The keywords used were "breast cancer risk", "night work" and "shift work". In total, 25 articles were selected. Night/shift workers are more at risk to develop a breast cancer (relative risk (RR) between 1.09; 95% CI: 1.02-1.20 and 1.48; 95% CI: 1.36-1.61 in the meta-analyses). However, this risk is not found by some cohort and case-control studies. The circadian rhythm disruption, responsible of disorderliness of melatonin secretion, could be one of the mechanisms involved in the increase of that risk. Hormonal status of night/shift workers, their geographic origin, their lifestyle and their vitamin D deficiency appear as other mechanisms potentially responsible for increased risk of cancer in this professional population. Moreover, a dose-effect connection may exist, with an increase of the risk with the number of years of night/shift work. Night/shift work is associated with a moderate increased risk of breast cancer, especially among women who worked over 20 years. Recommendations concerning the breast monitoring in this population could be diffused. The benefit of melatonin supplementation remains to be assessed. Copyright © 2015. Published by Elsevier SAS.

  18. popscience - European Researchers Night 2014

    CERN Multimedia

    Jeanneret, Guillaume

    2014-01-01

    Vendredi 26 septembre 2014, le CERN célèbrera la Nuit européenne des chercheurs à Genève et à St-Genis-Pouilly. Le thème de l’édition 2014 est inspiré d’Andy Warhol : « Pop science is for everyone ». On Friday 26 September 2014, CERN will be celebrating European Researchers' Night at three venues in Geneva and St. Genis-Pouilly. Inspired by Andy Warhol, this year's theme is “Pop science is for everyone”.

  19. A placebo-controlled study to investigate the effect of Dog Appeasing Pheromone and other environmental and management factors on the reports of disturbance and house soiling during the night in recently adopted puppies (Canis familiaris

    OpenAIRE

    Taylor, Katy; Mills, Daniel S.

    2007-01-01

    Disturbance and house soiling during the night are common problems faced by the new puppy dog owner. They may result as consequence of a mismatch between the developmental status of the puppy and its new environment and/or separation distress in a typically social animal. The aim of this study was to examine the effect of Dog Appeasing Pheromone (DAP, Ceva Santé Animale) as well as a range of other management and environmental factors that might affect this process. It has been suggested tha...

  20. No first night shift effect observed following a nocturnal main sleep and a prophylactic 1-h afternoon nap.

    Science.gov (United States)

    Kosmadopoulos, Anastasi; Zhou, Xuan; Roach, Gregory D; Darwent, David; Sargent, Charli

    Neurobehavioural impairment on the first night shift is often greater than on subsequent night shifts due to extended wakefulness. The aim of the study was to determine whether a 1-h afternoon nap prior to the first night shift is sufficient to produce neurobehavioural performance at levels comparable to the second night shift. Twelve male volunteers (mean age 22.9 years) participated in a laboratory protocol that simulated two 12-h night shifts. A nap preceded the first shift and a 7-h daytime sleep was scheduled between shifts. Neurobehavioural performance and subjective sleepiness measured across each night did not significantly differ between first and second shifts.

  1. Relationship of night and shift work with weight change and lifestyle behaviors.

    Science.gov (United States)

    Bekkers, Marga B M; Koppes, Lando L J; Rodenburg, Wendy; van Steeg, Harry; Proper, Karin I

    2015-04-01

    To prospectively study the association of night and shift work with weight change and lifestyle behaviors. Workers participating in the Netherlands Working Conditions Cohort Study (2008 and 2009) (N = 5951) reported night and shift work, weight and height. Groups included stable night or shift work, from day work to night or shift work, from night or shift work to day work, and no night or shift work in 2008 and 2009. Regression analyses were used to study association changes in night and shift work with weight change and changes in lifestyle behaviors. A larger weight change was seen in normal-weight workers changing from day to shift work (β = 0.93%; 95% confidence interval, 0.01 to 1.85) compared with stable no shift workers. No further associations of night and shift work with weight change were observed, neither in normal-weight, overweight, and obese workers. Despite the fact that starting night or shift work is associated with some unhealthy lifestyle habits, this study did not confirm a positive association of night and shift work with weight change over 1 year, except for normal-weight workers moving from day to shift work.

  2. Operational Evaluation of a Photic Countermeasure to Improve Alertness, Performance, and Mood During Night-Shift Work on the 105-Day Study (105-Day Russian Chamber Study)

    Data.gov (United States)

    National Aeronautics and Space Administration — The 105-day isolation study was conducted at the Institute for Biomedical Problems (IBMP) from 31 Mar 09 to 14 Jul 09. Six crewmembers lived and worked in an...

  3. Fixed or Rotating Night Shift Work Undertaken by Women: Implications for Fertility and Miscarriage.

    Science.gov (United States)

    Fernandez, Renae C; Marino, Jennifer L; Varcoe, Tamara J; Davis, Scott; Moran, Lisa J; Rumbold, Alice R; Brown, Hannah M; Whitrow, Melissa J; Davies, Michael J; Moore, Vivienne M

    2016-03-01

    This review summarizes the evidence concerning effects of night shift work on women's reproductive health, specifically difficulty in conceiving and miscarriage. We distinguish between fixed night shift and rotating night shift, as the population subgroups exposed, the social and biological mechanisms, and the magnitude of effects are likely to differ; of note, women working fixed night shift are known to have high tolerance for this schedule. We identified two relevant systematic reviews with meta-analyses and five additional studies. Night shift work may give rise to menstrual cycle disturbances, but effect sizes are imprecise. Endometriosis may be elevated in night shift workers, but evidence is only preliminary. Adequate data are lacking to assess associations between night shift work and infertility or time to pregnancy. The weight of evidence begins to point to working at night, whether in fixed or rotating shifts, as a risk factor for miscarriage. There are many methodological problems with this literature, with substantial variation in the definitions of night shift and schedule types making comparisons between studies difficult and pooling across studies questionable. Nevertheless, there appears to be grounds for caution and counselling where women have concerns about night shift work and their reproductive health. Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

  4. Rotating night shift work, sleep, and colorectal adenoma in women.

    Science.gov (United States)

    Devore, Elizabeth E; Massa, Jennifer; Papantoniou, Kyriaki; Schernhammer, Eva S; Wu, Kana; Zhang, Xuehong; Willett, Walter C; Fuchs, Charles S; Chan, Andrew T; Ogino, Shuji; Giovannucci, Edward; Wei, Esther K

    2017-07-01

    This study aims to investigate the associations of rotating night shift work history and sleep duration with risk of colorectal adenoma. We evaluated 56,275 cancer-free participants of the Nurses' Health Study II, who had their first colonoscopy or sigmoidoscopy between 1991 and 2011; rotating night shift work and sleep duration were reported by mailed questionnaire. Multivariable-adjusted logistic regression was used to estimate relative risks (RR) of colorectal adenoma, with 95% confidence intervals (CI), across categories of rotating night shift work history (none, 1-4, 5-9, and ≥10 years) and sleep duration (≤5, 6, 7, 8, and ≥9 h/day). We found no association between duration of rotating night shift work and occurrence of colorectal adenoma (p-trend across shift work categories = 0.5). Women with the longest durations of rotating night shift work (≥10 years) had a similar risk of adenoma compared to women without a history of rotating night shift work (multivariable-adjusted RR = 0.96, 95% CI = 0.83-1.11). Similarly, there were no associations of shorter or longer sleep durations with adenoma risk (p-trend = 0.2 across sleep durations of ≤5 through 7 h/day and p-trend = 0.5 across sleep durations of 7 through ≥9 h/day). Results were similar when we examined associations according to adenoma location and subtype. Our results do not support an association between rotating night shift work or sleep duration and risk of colorectal adenoma in women.

  5. Night Shift Work and Its Health Effects on Nurses.

    Science.gov (United States)

    Books, Candie; Coody, Leon C; Kauffman, Ryan; Abraham, Sam

    The purpose of this research was to study night shift work and its health effects on nurses. This was a quantitative study using descriptive design; it also incorporated three qualitative open-ended questions to complement the study. The data were collected using Survey Monkey, with an Internet-based confidential data collection tool. The population of relevance to this study was nurses employed in hospital settings in the United States. E-mail addresses and Facebook were used to recruit participants. Results indicated that there is an increased risk of sleep deprivation, family stressors, and mood changes because of working the night shift. Rotating shifts were mentioned as a major concern for night shift nurses. Respondents agreed that complaints about fatigue and fatigue-related illnesses in night shift workers were ignored. There was also a general perception among nurses working the night shift that sleep deprivation leads to negative health consequences including obesity; however, they were not as high a concern as rotating shifts or fatigue.

  6. Channel by Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 17 June 2004 This pair of images shows part of a small channel. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude 19.8, Longitude 141.5 East (218.5 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project

  7. Melas Chasma, Day and Night.

    Science.gov (United States)

    2002-01-01

    This image is a mosaic of day and night infrared images of Melas Chasma taken by the camera system on NASA's Mars Odyssey spacecraft. The daytime temperature images are shown in black and white, superimposed on the martian topography. A single nighttime temperature image is superimposed in color. The daytime temperatures range from approximately -35 degrees Celsius (-31 degrees Fahrenheit) in black to -5 degrees Celsius (23 degrees Fahrenheit) in white. Overlapping landslides and individual layers in the walls of Melas Chasma can be seen in this image. The landslides flowed over 100 kilometers (62 miles) across the floor of Melas Chasma, producing deposits with ridges and grooves of alternating warm and cold materials that can still be seen. The temperature differences in the daytime images are due primarily to lighting effects, where sunlit slopes are warm (bright) and shadowed slopes are cool (dark). The nighttime temperature differences are due to differences in the abundance of rocky materials that retain their heat at night and stay relatively warm (red). Fine grained dust and sand (blue) cools off more rapidly at night. These images were acquired using the thermal infrared imaging system infrared Band 9, centered at 12.6 micrometers.Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the 2001 Mars Odyssey mission for NASA's Office of Space Science in Washington, D.C. Investigators at Arizona State University in Tempe, the University of Arizona in Tucson and NASA's Johnson Space Center, Houston, operate the science instruments. Additional science partners are located at the Russian Aviation and Space Agency and at Los Alamos National Laboratories, New Mexico. Lockheed Martin Astronautics, Denver, is the prime contractor for the project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL. Aviation and Space Agency and at Los Alamos National Laboratories

  8. Lomonosov Crater, Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 16 June 2004 This pair of images shows part of Lomonosov Crater. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude 64.9, Longitude 350.7 East (9.3 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project

  9. Auditory Attention and Comprehension During a Simulated Night Shift: Effects of Task Characteristics.

    Science.gov (United States)

    Pilcher, June J; Jennings, Kristen S; Phillips, Ginger E; McCubbin, James A

    2016-11-01

    The current study investigated performance on a dual auditory task during a simulated night shift. Night shifts and sleep deprivation negatively affect performance on vigilance-based tasks, but less is known about the effects on complex tasks. Because language processing is necessary for successful work performance, it is important to understand how it is affected by night work and sleep deprivation. Sixty-two participants completed a simulated night shift resulting in 28 hr of total sleep deprivation. Performance on a vigilance task and a dual auditory language task was examined across four testing sessions. The results indicate that working at night negatively impacts vigilance, auditory attention, and comprehension. The effects on the auditory task varied based on the content of the auditory material. When the material was interesting and easy, the participants performed better. Night work had a greater negative effect when the auditory material was less interesting and more difficult. These findings support research that vigilance decreases during the night. The results suggest that auditory comprehension suffers when individuals are required to work at night. Maintaining attention and controlling effort especially on passages that are less interesting or more difficult could improve performance during night shifts. The results from the current study apply to many work environments where decision making is necessary in response to complex auditory information. Better predicting the effects of night work on language processing is important for developing improved means of coping with shiftwork. © 2016, Human Factors and Ergonomics Society.

  10. Night vision: changing the way we drive

    Science.gov (United States)

    Klapper, Stuart H.; Kyle, Robert J. S.; Nicklin, Robert L.; Kormos, Alexander L.

    2001-03-01

    A revolutionary new Night Vision System has been designed to help drivers see well beyond their headlights. From luxury automobiles to heavy trucks, Night Vision is helping drivers see better, see further, and react sooner. This paper describes how Night Vision Systems are being used in transportation and their viability for the future. It describes recent improvements to the system currently in the second year of production. It also addresses consumer education and awareness, cost reduction, product reliability, market expansion and future improvements.

  11. Lacanian Reading of Marsha Norman's Night, Mother

    Directory of Open Access Journals (Sweden)

    Khadijeh Taherifard

    2017-05-01

    Full Text Available This paper offers a Lacanian/feminist reading of Night, Mother by the American playwright Marsha Norman. The play Night, Mother will be read according to Lacan’s point of view and the concepts of identity and identity formation are studied in this paper. The play will be analyzed based on the Lacanian concepts of the contrast between the Imaginary Order and the Symbolic Order, and the notion of Death Drive, suggesting that in the play Jessie represents the Symbolic Order and her mother, Thelma, represents the Imaginary Order. The notion of Death Drive and its omnipresence in Jessie’s psyche is discussed and emphasized. Thelma functions as the Other for Jessie, while her father functions as the Mother, a reversal of gender roles in the Lacanian reading. Moreover, the relationship between some of the concepts are explained. It will be explicated how the play can be brought in line with a feminist reading of Lacan by reversing the stereotypical gender roles and subsequently getting close to post-feminist authors.

  12. Night sleep in patients with vegetative state.

    Science.gov (United States)

    Pavlov, Yuri G; Gais, Steffen; Müller, Friedemann; Schönauer, Monika; Schäpers, Barbara; Born, Jan; Kotchoubey, Boris

    2017-10-01

    Polysomnographic recording of night sleep was carried out in 15 patients with the diagnosis vegetative state (syn. unresponsive wakefulness syndrome). Sleep scoring was performed by three raters, and confirmed by means of a spectral power analysis of the electroencephalogram, electrooculogram and electromyogram. All patients but one exhibited at least some signs of sleep. In particular, sleep stage N1 was found in 13 patients, N2 in 14 patients, N3 in nine patients, and rapid eye movement sleep in 10 patients. Three patients exhibited all phenomena characteristic for normal sleep, including spindles and rapid eye movements. However, in all but one patient, sleep patterns were severely disturbed as compared with normative data. All patients had frequent and long periods of wakefulness during the night. In some apparent rapid eye movement sleep episodes, no eye movements were recorded. Sleep spindles were detected in five patients only, and their density was very low. We conclude that the majority of vegetative state patients retain some important circadian changes. Further studies are necessary to disentangle multiple factors potentially affecting sleep pattern of vegetative state patients. © 2017 European Sleep Research Society.

  13. Novel sublingual low-dose zolpidem tablet reduces latency to sleep onset following spontaneous middle-of-the-night awakening in insomnia in a randomized, double-blind, placebo-controlled, outpatient study.

    Science.gov (United States)

    Roth, Thomas; Krystal, Andrew; Steinberg, Frank J; Singh, Nikhilesh N; Moline, Margaret

    2013-02-01

    To evaluate efficacy and safety of 3.5-mg zolpidem tartrate sublingual tablets (ZST) on latency to sleep onset after middle-of-the-night (MOTN) awakenings in patients with insomnia characterized by difficulty returning to sleep after MOTN awakenings. Multicenter randomized, double-blind, placebo-controlled, parallel-group. Outpatient. There were 295 adults (median age 43 y; 68.1% female) with primary insomnia and difficulty returning to sleep after MOTN awakenings (three or more MOTN awakenings/wk during screening). After a 2-wk, single-blind placebo eligibility period, participants were randomized 1:1 to as-needed MOTN dosing with 3.5 mg ZST or placebo for 28 nights. An interactive voice response system determined if the study drug could be taken and recorded sleep/wake efficacy measures. ZST significantly (P Zolpidem Tartrate Tablet in Adult Patients with Insomnia" http://www.clinicaltrials.gov/ct2/show/NCT00466193?spons=%22Transcept+Pharmaceuticals%22&spons_ex=Y&rank=2

  14. The effect of chronotype on sleepiness, fatigue, and psychomotor vigilance of ICU nurses during the night shift

    OpenAIRE

    Reinke, Laurens; Ozbay, Yusuf; Dieperink, Willem; Tulleken, Jaap E.

    2015-01-01

    Purpose In general, sleeping and activity patterns vary between individuals. This attribute, known as chronotype, may affect night shift performance. In the intensive care unit (ICR), night shift performance may impact patient safety. We have investigated the effect of chronotype and social demographics on sleepiness, fatigue, and night shift on the performance of nurses. Methods This was a prospective observational cohort study which assessed the performance of 96 ICU night shift nurses duri...

  15. Speed of mental processing in the middle of the night

    Science.gov (United States)

    Monk, T. H.; Carrier, J.

    1997-01-01

    This study aimed to determine whether human mental processing actually slows down during the night hours, separately from the previously documented microsleeps, lapses in attention, and general slowing of motor responses. Eighteen healthy young adults were studied during 36 hours of constant wakeful bedrest. Every 2 hours, they performed a logical reasoning task. Items phrased in the negative voice took reliably longer to respond to than items phrased in the positive voice, indicating the need for more mental processing in those items. By subtracting "negative" from "positive" reaction times at each time of day, we were able to plot a circadian rhythm in the time taken for this extra mental processing to be done separately from microsleeps, psychomotor slowing, and inattention. The extra mental processing took longer at night and on the day following sleep loss than it did during the day before the sleep loss, suggesting that human mental processing slows down during the night under sleep deprivation.

  16. Night-time warming and the greenhouse effect

    International Nuclear Information System (INIS)

    Kukla, G.; Karl, T.R.

    1993-01-01

    Studies of temperature data collected mainly from rural stations in North America, China, the Commonwealth of Independent States, Australia, Sudan, Japan, Denmark, Northern Finland, several Pacific Islands, Pakistan, South Africa and Europe suggest that the reported warming of the Northern Hemisphere since WWII is principally a result of an increase in night-time temperatures. The average monthly maximum and minimum temperatures, as well as the mean diurnal temperature range (DTR), were calculated for various regions from data supplied by 1000 stations from 1951 to 1990. Average and minimum temperatures generally rose during the analysed interval and the rise in night-time temperatures was more pronounced than the increase in daily maximum temperatures. As a result, the mean DTR decreased almost everywhere. The most probable causes of the rise in night-time temperatures are: an increase in cloudiness owing to natural changes in the circulation patterns of oceans and the atmosphere; increased cloud cover density caused by industrial pollution; urban heat islands, generated by cities, which are strongest during the night; irrigation which keeps the surface warmer at night and cooler by day; and anthropogenic greenhouse gases. 18 refs., 3 figs

  17. Delivery outcomes after day and night onset of labour.

    Science.gov (United States)

    Kanwar, Sandeep; Rabindran, Ranjit; Lindow, Stephen W

    2015-11-01

    To describe the outcome of night onset of labour as compared with the day onset of labour to investigate if labour that begins at night is more efficient. Retrospective review of labour and delivery data. A large United Kingdom maternity service. Over the period of 10 years, there were 30,022 deliveries, of which 19,842 were studied. A United Kingdom maternity department database was used to identify deliveries over a 10-year period, and the delivery outcomes were retrieved from these records. The 19,842 labours were divided into two categories: night onset (22.00-06.00 h) and day onset (10.00-18.00 h). Rates of operative intervention, augmentation, epidural usage and labour duration. A significant difference in delivery outcome was noted (P=0.004) with the night-onset labours having more normal deliveries (83.6% vs. 82.5%), fewer caesarean sections (8.7% vs. 10.1%), fewer labour augmentations with syntocinon (14.9% vs. 19.5%, Pnight-onset group and 2414 (30%) in the day-onset group (χ2=1.3, P=NS) Conclusions: Labours that start at night appear to be more efficient than labours that start during the day.

  18. The impact of short night-time naps on performance, sleepiness and mood during a simulated night shift.

    Science.gov (United States)

    Centofanti, Stephanie A; Hilditch, Cassie J; Dorrian, Jillian; Banks, Siobhan

    2016-01-01

    Short naps on night shift are recommended in some industries. There is a paucity of evidence to verify the sustained recovery benefits of short naps in the last few hours of the night shift. Therefore, the current study aimed to investigate the sustained recovery benefits of 30 and 10-min nap opportunities during a simulated night shift. Thirty-one healthy participants (18F, 21-35 y) completed a 3-day, between-groups laboratory study with one baseline night (22:00-07:00 h time in bed), followed by one night awake (time awake from 07:00 h on day two through 10:00 h day three) with random allocation to: a 10-min nap opportunity ending at 04:00 h, a 30-min nap opportunity ending at 04:00 h or no nap (control). A neurobehavioral test bout was administered approximately every 2 h during wake periods. There were no significant differences between nap conditions for post-nap psychomotor vigilance performance after controlling for pre-nap scores (p > 0.05). The 30-min nap significantly improved subjective sleepiness compared to the 10-min nap and no-nap control (p effect.

  19. Smoking addiction among young women working at night at International call centres in India

    OpenAIRE

    Amrita Gupta

    2018-01-01

    Background Indian women are actively involved in occupations which were regarded as a taboo such as night work. Working at night for international call centres is a significant step in moving ahead of patriarchal control over women´s mobility in India. The job brings about lifestyle changes among employees such as late night partying, smoking, and boozing. The women employees are mainly fresh graduates. The study brings about the prevalence and smoking behaviour among th...

  20. How do different definitions of night shift affect the exposure assessment of night work?

    DEFF Research Database (Denmark)

    Garde, Anne Helene; Hansen, Johnni; Kolstad, Henrik A

    2016-01-01

    the reference definition (at least 3 h of work between 24:00 and 05:00) and definitions using a period during the night. The overlap with definitions based on starting and ending time was less pronounced (64-71 %). The proportion of classified night shifts differs little when night shifts are based...

  1. Night-vision goggles for night-blind subjects : subjective evaluation after 2 years of use

    NARCIS (Netherlands)

    Hartong, D. T.; Kooijman, A. C.

    Purpose: To evaluate the usefulness of night-vision goggles (NVG) for night-blind subjects after 1 and 2 years of use. Methods: Eleven night-blind subjects with retinitis pigmentosa used NVG for a 2-year period. At the end of each year, they were requested to fill-in two questionnaires regarding

  2. Day-and-night glycaemic control with closed-loop insulin delivery versus conventional insulin pump therapy in free-living adults with well controlled type 1 diabetes: an open-label, randomised, crossover study.

    Science.gov (United States)

    Bally, Lia; Thabit, Hood; Kojzar, Harald; Mader, Julia K; Qerimi-Hyseni, Jehona; Hartnell, Sara; Tauschmann, Martin; Allen, Janet M; Wilinska, Malgorzata E; Pieber, Thomas R; Evans, Mark L; Hovorka, Roman

    2017-04-01

    Tight control of blood glucose concentration in people with type 1 diabetes predisposes to hypoglycaemia. We aimed to investigate whether day-and-night hybrid closed-loop insulin delivery can improve glucose control while alleviating the risk of hypoglycaemia in adults with HbA 1c below 7·5% (58 mmol/mol). In this open-label, randomised, crossover study, we recruited adults (aged ≥18 years) with type 1 diabetes and HbA 1c below 7·5% from Addenbrooke's Hospital (Cambridge, UK) and Medical University of Graz (Graz, Austria). After a 2-4 week run-in period, participants were randomly assigned (1:1), using web-based randomly permuted blocks of four, to receive insulin via the day-and-night hybrid closed-loop system or usual pump therapy for 4 weeks, followed by a 2-4 week washout period and then the other intervention for 4 weeks. Treatment interventions were unsupervised and done under free-living conditions. During the closed-loop period, a model-predictive control algorithm directed insulin delivery, and prandial insulin delivery was calculated with a standard bolus wizard. The primary outcome was the proportion of time when sensor glucose concentration was in target range (3·9-10·0 mmol/L) over the 4 week study period. Analyses were by intention to treat. This study is registered with ClinicalTrials.gov, number NCT02727231, and is completed. Between March 21 and June 24, 2016, we recruited 31 participants, of whom 29 were randomised. One participant withdrew during the first closed-loop period because of dissatisfaction with study devices and glucose control. The proportion of time when sensor glucose concentration was in target range was 10·5 percentage points higher (95% CI 7·6-13·4; pday-and-night hybrid closed-loop insulin delivery under unsupervised, free-living conditions for 4 weeks in adults with type 1 diabetes and HbA 1c below 7·5% is safe and well tolerated, improves glucose control, and reduces hypoglycaemia burden. Larger and longer studies

  3. Determinants of day–night difference in blood pressure, a comparison with determinants of daytime and night-time blood pressure

    Science.gov (United States)

    Musameh, M D; Nelson, C P; Gracey, J; Tobin, M; Tomaszewski, M; Samani, N J

    2017-01-01

    Blunted day–night difference in blood pressure (BP) is an independent cardiovascular risk factor, although there is limited information on determinants of diurnal variation in BP. We investigated determinants of day–night difference in systolic (SBP) and diastolic (DBP) BP and how these compared with determinants of daytime and night-time SBP and DBP. We analysed the association of mean daytime, mean night-time and mean day–night difference (defined as (mean daytime−mean night-time)/mean daytime) in SBP and DBP with clinical, lifestyle and biochemical parameters from 1562 adult individuals (mean age 38.6) from 509 nuclear families recruited in the GRAPHIC Study. We estimated the heritability of the various BP phenotypes. In multivariate analysis, there were significant associations of age, sex, markers of adiposity (body mass index and waist–hip ratio), plasma lipids (total and low-density lipoprotein cholesterol and triglycerides), serum uric acid, alcohol intake and current smoking status on daytime or night-time SBP and/or DBP. Of these, only age (P=4.7 × 10−5), total cholesterol (P=0.002), plasma triglycerides (P=0.006) and current smoking (P=3.8 × 10−9) associated with day–night difference in SBP, and age (P=0.001), plasma triglyceride (P=2.2 × 10−5) and current smoking (3.8 × 10−4) associated with day–night difference in DBP. 24-h, daytime and night-time SBP and DBP showed substantial heritability (ranging from 18–43%). In contrast day–night difference in SBP showed a lower heritability (13%) while heritability of day–night difference in DBP was not significant. These data suggest that specific clinical, lifestyle and biochemical factors contribute to inter-individual variation in daytime, night-time and day–night differences in SBP and DBP. Variation in day–night differences in BP is largely non-genetic. PMID:26984683

  4. Risk of injury after evening and night work - findings from the Danish Working Hour Database

    DEFF Research Database (Denmark)

    Nielsen, Helena B; Larsen, Ann D; Dyreborg, Johnny

    2018-01-01

    during the past week increases risk of injury when reducing recall bias and unmeasured confounding. Methods We linked daily working hours at the individual level of 69 200 employees (167 726 person years from 2008-2015), primarily working at hospitals to registry information on 11 834 injuries leading......Objectives Evening and night work have been associated with higher risk of injury than day work. However, previous findings may be affected by recall bias and unmeasured confounding from differences between day, evening and night workers. This study investigates whether evening and night work...... to emergency room visits or death. Analyses were conducted with Poisson regression models in the full population including permanent day, evening and night workers, and in two sub-populations of evening and night workers, with both day and evening or night work, respectively. Thus, the exchangeability between...

  5. The effect of the number of consecutive night shifts on diurnal rhythms in cortisol, melatonin and heart rate variability (HRV)

    DEFF Research Database (Denmark)

    Jensen, Marie Aarrebo; Garde, Anne Helene; Kristiansen, Jesper

    2016-01-01

    PURPOSE: The purpose of this review is to summarize the current knowledge from field studies on how many consecutive night shifts are required for adaptation of diurnal rhythms in cortisol, melatonin and heart rate variability (HRV) to night work. METHODS: A systematic search of the databases Pub...... recordings for HRV. Most of the studies in the review were small studies with less than 30 participants, and most studies evaluated diurnal rhythms after only two consecutive night shifts whereas only six studies used seven or more consecutive night shifts. The majority of studies found that adaptation...... to night work had not occurred after two consecutive night shifts, whereas a small number found evidence for full adaptation after seven consecutive night shifts based on diurnal rhythms in cortisol and melatonin. CONCLUSION: There are methodological differences in the field studies analyzing diurnal...

  6. Night time cooling by ventilation or night sky radiation combined with in-room radiant cooling panels including phase change materials

    DEFF Research Database (Denmark)

    Bourdakis, Eleftherios; Olesen, Bjarne W.; Grossule, Fabio

    Night sky radiative cooling technology using PhotoVoltaic/Thermal panels (PVT) and night time ventilation have been studied both by means of simulations and experiments to evaluate their potential and to validate the created simulation model used to describe it. An experimental setup has been...... depending on the sky clearness. This cooling power was enough to remove the stored heat and regenerate the ceiling panels. The validation simulation model results related to PCM were close to the corresponding results extracted from the experiment, while the results related to the production of cold water...... through the night sky radiative cooling differed significantly. The possibility of night time ventilation was studied through simulations for three different latitudes. It was concluded that for Danish climatic conditions night time ventilation would also be able to regenerate the panels while its...

  7. Seeing Stars: A GLOBE at Night Campaign Update

    Science.gov (United States)

    Walker, Constance E.; Pompea, S. M.; Sparks, R. T.; Newhouse, M.

    2012-01-01

    The emphasis in the international citizen-science, star-hunting campaign, GLOBE at Night, is in bringing awareness to the public on issues of light pollution. Light pollution threatens not only observatory sites and our "right to starlight", but can affect energy consumption, wildlife and health. GLOBE at Night has successfully reached a few 100,000 citizen-scientists. What has done in the last year to contribute to its success? • To promote the campaign via popular social media, GLOBE at Night created Facebook and Twitter pages. • Videos have been created for 4 out of 8 Dark Skies Rangers activities. • Sky brightness measurements can be submitted in real time with smart phones or tablets using the new Web application at www.globeatnight.org/webapp/. The location, date and time register automatically. • As a proto-type, an adopt-a-street program had people in Tucson take measurements every mile for the length of the street. Grid measurements canvassed the town, allowing for comparisons of light levels over time. • The increase to 2 campaigns in 2011 re-enforces these studies. In 2012, the campaign will be offered 4 times for 10 days a month: January 14-23, February 12-21, March 13-22 and April 11-20. • A new Web application (www.globeatnight.org/mapapp/) allows for mapping GLOBE at Night data points within a specified distance around a city or area of choice. The resulting maps are bookmarkable and shareable. • NOAO and Arizona Game and Fish Department started a project with GLOBE at Night data and bat telemetry to examine a dark skies corridor in Tucson where endangered bats fly. While providing these updates to the GLOBE at Night program, the presentation will highlight the education and outreach value of the program's resources and outcomes, lessons learned, successes and pitfalls in communicating awareness with the public and attracting young people to study science.

  8. The day and night distributions of waterfowl on the Mersey and adjacent areas

    International Nuclear Information System (INIS)

    Clark, N.A.; Donald, P.F.; Mawdesley, T.M.; Waters, R.J.

    1990-09-01

    This study reviews the literature and data on night-time feeding in order to make a comparison with daytime feeding and hence to suggest implications for barrage impact assessments based on data collected solely during daytime on feeding waders and wildfowl. It assesses the distribution and abundance of wildfowl and waders on estuaries, such as the Mersey, at night and the importance to wildfowl and wader populations of night feeding on estuaries. It also assesses the relationship between daytime and night-time feeding distributions and activity budgets of wildfowl and waders using estuaries. (author)

  9. Complex sleep apnea after full-night and split-night polysomnography: the Greek experience.

    Science.gov (United States)

    Baou, Katerina; Mermigkis, Charalampos; Minaritzoglou, Aliki; Vagiakis, Emmanouil

    2017-12-08

    Treatment-emergent central sleep apnea (TE-CSA) is defined as the emergence or persistence of central respiratory events during the initiation of positive airway pressure (PAP) without a back-up rate in obstructive sleep apnea (OSA) patients and after significant resolution of obstructive events. Previous studies have estimated a prevalence from 0.56 to 20.3%. The aim of this study was to establish the prevalence of TE-CSA in a Greek adult population. One thousand fifty nine patients with newly diagnosed OSA, who were referred to the Sleep Disorders Center of Evangelismos Hospital of Athens over an 18-month period, were included in this study. A split-night polysomnography (PSG), or two formal overnight PSGs (diagnostic and continuous PAP (CPAP) titration study), were performed. Patients with OSA were divided in two groups; the first group included 277 patients, who underwent two separate studies (diagnostic and CPAP titration study), and the second group 782 patients, who underwent split-night studies. The prevalence of TE-CSA in the first group was 2.53% (7 patients), and in the second group was 5.63% (44 patients). The prevalence of TE-CSA in Greece was lower compared to most previous reported studies. The significant variation in the prevalence of TE-CSA between different centers throughout the world is mainly associated with the used diagnostic criteria as well as methodological and technical aspects.

  10. Patients with primary insomnia in the sleep laboratory: do they present with typical nights of sleep?

    Science.gov (United States)

    Hirscher, Verena; Unbehaun, Thomas; Feige, Bernd; Nissen, Christoph; Riemann, Dieter; Spiegelhalder, Kai

    2015-08-01

    The validity of sleep laboratory investigations in patients with insomnia is important for researchers and clinicians. The objective of this study was to examine the first-night effect and the reverse first-night effect in patients with chronic primary insomnia compared with good sleeper controls. A retrospective comparison of a well-characterised sample of 50 patients with primary insomnia and 50 good sleeper controls was conducted with respect to 2 nights of polysomnography, and subjective sleep parameters in the sleep laboratory and the home setting. When comparing the first and second sleep laboratory night, a significant first-night effect was observed across both groups in the great majority of the investigated polysomnographic and subjective variables. However, patients with primary insomnia and good sleeper controls did not differ with respect to this effect. Regarding the comparison between the sleep laboratory nights and the home setting, unlike good sleeper controls, patients with primary insomnia reported an increased subjective sleep efficiency on both nights (in part due to a reduced bed time) and an increased subjective total sleep time on the second night. These results suggest that even the second sleep laboratory night does not necessarily provide clinicians and researchers with a representative insight into the sleep perception of patients with primary insomnia. Future studies should investigate whether these findings also hold for other patient populations. © 2015 European Sleep Research Society.

  11. The effect of chronotype on sleepiness, fatigue, and psychomotor vigilance of ICU nurses during the night shift.

    Science.gov (United States)

    Reinke, Laurens; Özbay, Yusuf; Dieperink, Willem; Tulleken, Jaap E

    2015-04-01

    In general, sleeping and activity patterns vary between individuals. This attribute, known as chronotype, may affect night shift performance. In the intensive care unit (ICR), night shift performance may impact patient safety. We have investigated the effect of chronotype and social demographics on sleepiness, fatigue, and night shift on the performance of nurses. This was a prospective observational cohort study which assessed the performance of 96 ICU night shift nurses during the day and night shifts in a mixed medical-surgical ICU in the Netherlands. We determined chronotype and assessed sleeping behaviour for each nurse prior to starting shift work and before free days. The level of sleepiness and fatigue of nurses during the day and night shifts was determined, as was the effect of these conditions on psychomotor vigilance and mathematical problem-solving. The majority of ICU nurses had a preference for early activity (morning chronotype). Compared to their counterparts (i.e. evening chronotypes), they were more likely to nap before commencing night shifts and more likely to have young children living at home. Despite increased sleepiness and fatigue during night shifts, no effect on psychomotor vigilance was observed during night shifts. Problem-solving accuracy remained high during night shifts, at the cost of productivity. Most of the ICU night shift nurses assessed here appeared to have adapted well to night shift work, despite the high percentage of morning chronotypes, possibly due to their 8-h shift duration. Parental responsibilities may, however, influence shift work tolerance.

  12. Relationship of night and shift work with weight change and lifestyle behaviors

    NARCIS (Netherlands)

    Bekkers, M.B.M.; Koppes, L.L.J.; Rodenburg, W.; Steeg, H. van; Proper, K.I.

    2015-01-01

    Objective: To prospectively study the association of night and shift work with weight change and lifestyle behaviors. Methods: Workers participating in the Netherlands Working Conditions Cohort Study (2008 and 2009) (N = 5951) reported night and shift work, weight and height. Groups included stable

  13. Relationship of night and shift work with weight change and lifestyle behaviors.

    NARCIS (Netherlands)

    Bekkers, M.B.M; Koppes, L.L.J.; Rodenburg, W.; Steeg, H. van; Proper, K.I.

    2015-01-01

    Objective: To prospectively study the association of night and shift work with weight change and lifestyle behaviors. Methods: Workers participating in the Netherlands Working Conditions Cohort Study (2008 and 2009) (N = 5951) reported night and shift work, weight and height. Groups included stable

  14. Relationship of Night and Shift Work With Weight Change and Lifestyle Behaviors

    NARCIS (Netherlands)

    Bekkers, M.B.M.; Koppes, L.L.J.; Rodenburg, W.; van Steeg, H.; Proper, K.I.

    2015-01-01

    Objective: To prospectively study the association of night and shift work with weight change and lifestyle behaviors. Methods: Workers participating in the Netherlands Working Conditions Cohort Study (2008 and 2009) (N = 5951) reported night and shift work, weight and height. Groups included stable

  15. Company Policies on Working Hours and Night Work in Relation to Older Workers' Work Ability and Work Engagement: Results From a Dutch Longitudinal Study with 2 Year Follow-Up.

    Science.gov (United States)

    van der Meer, Laudry; Leijten, Fenna R M; Heuvel, Swenneke G; Ybema, Jan F; de Wind, Astrid; Burdorf, Alex; Geuskens, Goedele A

    2016-06-01

    Purpose To longitudinally investigate (1) whether lower work ability and work engagement predict the use of company policies on reduced working hours and exemption from evening/night work among older workers, and (2) whether using such policies subsequently contribute to higher work ability and work engagement. Methods In total 6922 employees (45-64 years) participating in the first three waves of the Study on Transitions in Employment, Ability and Motivation were included. Participants yearly filled out an online questionnaires. Regression analyses were applied to study the influence of baseline work ability and work engagement on the incident use of policies during the first year of follow-up, and the incident use of these policies on work ability and work engagement during the second year of follow-up. Results Employees with a higher work ability were less likely to start using the policy 'reduced working hours' [OR 0.91 (95 % CI 0.83-0.98)]. Starting to use this policy was in turn related to lower work ability 1 year later [B -0.28 (95 % CI -0.47 to -0.08)]. Starting to use the policy 'exemption from evening/night work' was related to higher work engagement 1 year later [B 0.23 (95 % CI 0.07-0.39)]. Conclusions Low work ability precedes the use of some company policies aiming to support sustainable employability of older workers. Further research is needed to explore whether company policies result in a (longstanding) improvement, or reduced deterioration, of older workers' employability.

  16. Organization and management of ATLAS nightly builds

    International Nuclear Information System (INIS)

    Luehring, F; Obreshkov, E; Quarrie, D; Rybkine, G; Undrus, A

    2010-01-01

    The automated multi-platform software nightly build system is a major component in the ATLAS collaborative software organization, validation and code approval schemes. Code developers from ATLAS participating Institutes spread all around the world use about 30 branches of nightly releases for testing new packages, verification of patches to existing software, and migration to new platforms and compilers. The nightly releases lead up to, and are the basis of, stable software releases used for data processing worldwide. The ATLAS nightly builds are managed by the fully automated NICOS framework on the computing farm with 44 powerful multiprocessor nodes. The ATN test tool is embedded within the nightly system and provides results shortly after full compilations complete. Other test frameworks are synchronized with NICOS jobs and run larger scale validation jobs using the nightly releases. NICOS web pages dynamically provide information about the progress and results of the builds. For faster feedback, E-mail notifications about nightly releases problems are automatically distributed to the developers responsible.

  17. Dark nights reverse metabolic disruption caused by dim light at night.

    Science.gov (United States)

    Fonken, L K; Weil, Z M; Nelson, R J

    2013-06-01

    The increasing prevalence of obesity and related metabolic disorders coincides with increasing exposure to light at night. Previous studies report that mice exposed to dim light at night (dLAN) develop symptoms of metabolic syndrome. This study investigated whether mice returned to dark nights after dLAN exposure recover metabolic function. Male Swiss-Webster mice were assigned to either: standard light-dark (LD) conditions for 8 weeks (LD/LD), dLAN for 8 weeks (dLAN/dLAN), LD for 4 weeks followed by 4 weeks of dLAN (LD/dLAN), and dLAN for 4 weeks followed by 4 weeks of LD (dLAN/LD). After 4 weeks in their respective lighting conditions both groups initially placed in dLAN increased body mass gain compared to LD mice. Half of the dLAN mice (dLAN/LD) were then transferred to LD and vice versa (LD/dLAN). Following the transfer dLAN/dLAN and LD/dLAN mice gained more weight than LD/LD and dLAN/LD mice. At the conclusion of the study dLAN/LD mice did not differ from LD/LD mice with respect to weight gain and had lower fat pad mass compared to dLAN/dLAN mice. Compared to all other groups dLAN/dLAN mice decreased glucose tolerance as indicated by an intraperitoneal glucose tolerance test at week 7, indicating that dLAN/LD mice recovered glucose metabolism. dLAN/dLAN mice also increased MAC1 mRNA expression in peripheral fat as compared to both LD/LD and dLAN/LD mice, suggesting peripheral inflammation is induced by dLAN, but not sustained after return to LD. These results suggest that re-exposure to dark nights ameliorates metabolic disruption caused by dLAN exposure. Copyright © 2013 The Obesity Society.

  18. Decreased heart rate variability in surgeons during night shifts

    DEFF Research Database (Denmark)

    Amirian, Ilda; Toftegård Andersen, Lærke; Rosenberg, Jacob

    2014-01-01

    BACKGROUND: Heart rate variability (HRV) has been used as a measure of stress and mental strain in surgeons. Low HRV has been associated with death and increased risk of cardiac events in the general population. The aim of this study was to clarify the effect of a 17-hour night shift on surgeons'...

  19. Day-to-night heat storage in greenhouses

    NARCIS (Netherlands)

    Seginer, Ido; Straten, van Gerrit; Beveren, van Peter J.M.

    2017-01-01

    Day-to-night heat storage in water tanks (buffers) is common practice in cold-climate greenhouses, where gas is burned during the day for carbon dioxide enrichment. In Part 1 of this study, an optimal control approach was outlined for such a system, the basic idea being that the virtual value

  20. Day/Night Cycle: Mental Models of Primary School Children

    Science.gov (United States)

    Chiras, Andreas

    2008-01-01

    The study investigated the mental models of primary school children related to the day/night cycle. Semi-structure interviews were conducted with 40 fourth-grade and 40 sixth-grade children. Qualitative and quantitative analysis of the data indicated that the majority of the children were classified as having geocentric models. The results also…

  1. Difference in initial dental biofilm accumulation between night and day.

    Science.gov (United States)

    Dige, Irene; Schlafer, Sebastian; Nyvad, Bente

    2012-12-01

    The study of initial microbial colonization on dental surfaces is a field of intensive research because of the aetiological role of biofilms in oral diseases. Most previous studies of de novo accumulation and composition of dental biofilms in vivo do not differentiate between biofilms formed during day and night. This study hypothesized that there is a diurnal variation in the rate of accumulation of bacteria on solid surfaces in the oral cavity. In situ biofilm from healthy individuals was collected for 12 h during day and night, respectively, subjected to fluorescent in situ hybridization and visualized using confocal laser scanning microscopy. Analysis of the biofilms using stereological methods and digital image analysis revealed a consistent statistically significant difference between both the total number of bacteria and the biovolume in the two 12-h groups (p = 0.012), with the highest accumulation of bacteria during daytime (a factor of 8.8 and 6.1 higher, respectively). Hybridization with probes specific for streptococci and Actinomyces naeslundii indicated a higher proportion of streptococci in biofilms grown during daytime as compared to night-time. No differences could be observed for A. naeslundii. The degree of microbial coverage and the bacterial composition varied considerably between different individuals. The data provide firm evidence that initial biofilm formation decreases during the night, which may reflect differences in the availability of salivary nutrients. This finding is of significant importance when studying population dynamics during experimental dental biofilm formation.

  2. Luxurious Buses As Means Of Night Journey In Nigeria: Challenges ...

    African Journals Online (AJOL)

    transfer to discourage robbery cases on our roads. Passengers should also keep their traveling plans secret as much as possible as a way of fostering safety. Keywords: night journey, armed robbers, luxurious buses and police escorts. Ethiopian Journal of Environmental Studies and Management Vol. 1 (3) 2008: pp. 52-62.

  3. Physiological and Psychological Aspects of Night and Shift Work.

    Science.gov (United States)

    Wojtczak-Jaroszowa, Jadwiga

    Results of physiological and psychological studies related to night and shift work are reviewed from the standpoint of their possible use by industry in understanding the problems of shift work and finding solutions. (New research data that has appeared since original preparation of the manuscript is presented in a three-part addendum with…

  4. Night-shift work is associated with increased pain perception.

    Science.gov (United States)

    Matre, Dagfinn; Knardahl, Stein; Nilsen, Kristian Bernhard

    2017-05-01

    Objectives The aim of the present study was to determine whether shift workers exhibit increased perception of experimentally induced pain after working night shifts. Methods The study was a paired cross-over design with two sleep conditions, after at least two nights of habitual sleep and after two consecutive night shifts at work. Fifty-three nurses in rotating shift work participated. The sensitivity to electrically induced pain, heat pain, cold pain, pressure pain and pain inhibition was determined experimentally in each sleep condition. Sleepiness and vigilance were also assessed. Results Night-shift work (NSW) increased the sensitivity to electrically induced pain and heat pain (P≤0.001). Relative to habitual sleep, electrically induced pain increased by 22.3% and heat pain increased by 26.5%. The sensitivity to cold and pressure pain did not change, changes relative to habitual sleep was 0.5). Pain inhibition was 66.9% stronger after NSW versus after habitual sleep (Peffect sizes and may be an important marker for studies comparing the physiological effects of different shift work schedules. Explanations for the differential effect on different pain modalities should be a focus for future studies.

  5. Data from: Artificial night lighting inhibits feeding in moths

    NARCIS (Netherlands)

    Langevelde, van F.; Grunsven, van R.H.A.; Veenendaal, E.M.; Fijen, T.P.M.

    2017-01-01

    One major, yet poorly studied, change in the environment is nocturnal light pollution, which strongly alters habitats of nocturnally active species. Artificial night lighting is often considered as driving force behind rapid moth population declines in severely illuminated countries. To understand

  6. Night shift work and prolactin as a breast cancer risk factor

    Directory of Open Access Journals (Sweden)

    Agnieszka Bukowska

    2013-04-01

    Full Text Available Prolactin - a hormone secreted in a circadian rhythm acts as a regulator of growth and development of the mammary glands. It has been observed that working at night increases breast cancer risk in women. Night shift work, probably carcinogenic to humans (Group 2A IARC, can disrupt a circadian rhythm, and thus potentially alter the rhythm of prolactin secretion. The aim of our work was to review epidemiological evidence on the association between prolactin and the risk of breast cancer and the influence of work at night on prolactin secretion. Search was done in the Medline database by keywords (shift work, work at night, risk of breast cancer and prolactin. The increased proliferation of breast cells activated by prolactin can promote the development of cancer. The results of the largest epidemiological prospective studies suggest the association between prolactin levels and the risk of breast cancer in women. So far, only seven studies have investigated the association between work at night and prolactin secretion. In three studies lower concentrations of prolactin have been observed in night shift workers. No relationship between the night shift work duration and prolactin level in women have been reported. Night shift work can modify the profile of prolactin secretion in night workers, probably decreasing the secretion of this hormone at night. It is therefore unlikely that prolactin plays an important role in the development of breast cancer in women working at night. This conclusion is based on the results of a few epidemiological studies. Med Pr 2013;64(2:245–257

  7. Night sky a falcon field guide

    CERN Document Server

    Nigro, Nicholas

    2012-01-01

    Night Sky: A Falcon Field Guide covers both summer and winter constellations, planets, and stars found in the northern hemisphere. Conveniently sized to fit in a pocket and featuring detailed photographs, this informative guide makes it easy to identify objects in the night sky even from one's own backyard. From information on optimal weather conditions, preferred viewing locations, and how to use key tools of the trade, this handbook will help you adeptly navigate to and fro the vast and dynamic nighttime skies, and you'll fast recognize that the night sky's the limit.

  8. The influence of day/night cycles on biomass yield and composition of Neochloris oleoabundans.

    Science.gov (United States)

    de Winter, Lenneke; Cabanelas, Iago Teles Dominguez; Martens, Dirk E; Wijffels, René H; Barbosa, Maria J

    2017-01-01

    Day/night cycles regulate the circadian clock of organisms to program daily activities. Many species of microalgae have a synchronized cell division when grown under a day/night cycle, and synchronization might influence biomass yield and composition. Therefore, the aim of this study was to study the influence of day/night cycle on biomass yield and composition of the green microalgae Neochloris oleoabundans . Hence, we compared continuous turbidostat cultures grown under continuous light with cultures grown under simulated day/night cycles. Under day/night cycles, cultures were synchronized as cell division was scheduled in the night, whereas under continuous light cell division occurred randomly synchronized cultures were able to use the light 10-15% more efficiently than non-synchronized cultures. Our results indicate that the efficiency of light use varies over the cell cycle and that synchronized cell division provides a fitness benefit to microalgae. Biomass composition under day/night cycles was similar to continuous light, with the exception of starch content. The starch content was higher in cultures under continuous light, most likely because the cells never had to respire starch to cover for maintenance during dark periods. Day/night cycles were provided in a 'block' (continuous light intensity during the light period) and in a 'sine' (using a sine function to simulate light intensities from sunrise to sunset). There were no differences in biomass yield or composition between these two ways of providing light (in a 'block' or in a 'sine'). The biomass yield and composition of N. oleoabundans were influenced by day/night cycles. These results are important to better understand the relations between research done under continuous light conditions and with day/night cycle conditions. Our findings also imply that more research should be done under day/night cycles.

  9. Prevalence and Perception of Ketamine Use among Young Danish Night Clubbers:

    DEFF Research Database (Denmark)

    Ravn, Signe; Demant, Jakob

    2012-01-01

    AIMS – This article describes the prevalence of ketamine use among Danish recreational drug users and provides a contextual understanding of ketamine use within this group. METHODS AND DATA – The analysis is based on a mixed-methods night club study combining a survey among guests in night clubs (N...

  10. The influence of day/night cycles on biomass yield and composition of Neochloris oleoabundans

    NARCIS (Netherlands)

    Winter, de Lenneke; Dominguez Teles, Iago; Martens, Dirk E.; Wijffels, René H.; Barbosa, Maria J.

    2017-01-01

    Background: Day/night cycles regulate the circadian clock of organisms to program daily activities. Many species of microalgae have a synchronized cell division when grown under a day/night cycle, and synchronization might influence biomass yield and composition. Therefore, the aim of this study

  11. Working at Night in Hospital Environment is a Risk Factor for Arterial Stiffness

    Directory of Open Access Journals (Sweden)

    Sinem Özbay

    2012-09-01

    Full Text Available Aim: Arterial stiffness is an independent risk factor for cardiovascular disease. In previous studies, emotional stress has been reported to be a risk factor for cardiovascular disease. In this study, we aimed to investigate the effects of anxiety, stress and fatigue associated with working at night in hospital environment on arterial stiffness in physicians. Methods: The study was carried out with 30 physicians employed in Medical Faculty of Uludağ University between October 2011 and March 2012. Measurements were made using Pulse Wave Sensor HDI system (Hypertension Diagnostics Inc, Eagan, MN(Set No: CR000344 by radial artery pulse wave at the onset and end of night shift. Results: The mean age of night doctors included in the study was 26 years (range: 22-38 and the female/male ratio was 2/1. It was determined that mean values of arterial stiffness were significantly higher after night shift (1330±360 dyne/sn/cm-5 compared to mean values before night shift (1093±250 dyn/s/cm-5 (p=0.01. In the evaluation of other parameters before and after night shift, no statistically significant difference was detected (p>0.05. Conclusion: The increasing arterial stiffness in hospital employees after night shift could be attributed to the effects of stress and fatigue experienced during night shift. (The Me di cal Bul le tin of Ha se ki 2012; 50: 93-5

  12. Binge eating disorder and night eating syndrome in adults with type 2 diabetes

    Science.gov (United States)

    To determine the prevalence of binge eating disorder (BED) and night eating syndrome (NES) among applicants to the Look AHEAD (Action for Health in Diabetes) study. The Eating Disorders Examination-Questionnaire (EDE-Q) and the Night Eating Questionnaire (NEQ) were used to screen patients. Phone int...

  13. TBT recommends : Courtney Pine. Hansa disco night

    Index Scriptorium Estoniae

    2005-01-01

    Inglise jazzsaksofonisti Courtney Pine heliplaadi "Resistance" esitluskontserdist 15. dets. Rock Cafés Tallinnas. Inglise laulja Chris Norman läti ansamblitega üritusel "Hansa disco night Nr.4" 9. dets. Kipsala Hallis Riias

  14. Train-the-Trainer Video on the Deliberate Night Attack

    National Research Council Canada - National Science Library

    Dyer, Jean

    1998-01-01

    .... Night and day photography illustrate the training sequence needed to master the individual and buddy team skills, battle drills, and situational training exercises that support the night attack...

  15. Solar Neutrino Day-Night Effect

    International Nuclear Information System (INIS)

    Blennow, Mattias; Ohlsson, Tommy; Snellman, Hakan

    2005-01-01

    We summarize the results of Ref. [M. Blennow, T. Ohlsson and H. Snellman, Phys. Rev. D 69 (2004) 073006, hep-ph/0311098] in which we determine the effects of three flavor mixing on the day-night asymmetry in the flux of solar neutrinos. Analytic methods are used to determine the difference in the day and night solar electron neutrino survival probabilities and numerical methods are used to determine the effect of three flavor mixing at detectors

  16. Sleep quality in nurses: a randomized clinical trial of day and night shift workers.

    Science.gov (United States)

    Niu, Shu-Fen; Chu, Hsin; Chung, Min-Huey; Lin, Chun-Chieh; Chang, Yu-Shiun; Chou, Kuei-Ru

    2013-07-01

    The study investigated the number of days off nurses working night shifts need to recover their sleep quality to the level of daytime workers during their days off. This study included 30 day-shift nurses and 32 night-shift nurses. It was conducted as a randomized clinical trial in the medical and surgical wards of a medical center in northern Taiwan in May and June 2010 using sleep diaries and sleep parameters collected by actigraphy on different workdays and days off. On workdays, the night-shift group had significantly less total sleep time (TST) on Day 5 and significantly lower sleep efficiency (SE) on Day 3 than the day-shift group. TSTs of the two groups on days off were higher than those on workdays. On the 4th consecutive day off, higher TST, a decrease in WASO, and an increase in SE suggests that the night-shift group had recovered their sleep quality to the level of the day-shift group on their days off. The SE of the night-shift group exceeded that of the day-shift group after the 4th consecutive day off, though the difference was not statistically significant in the present study. Based on these data, it is recommended that night-shift workers arrange a period of at least 4 days off after 5 consecutive night shifts and at least 5 days off if the staff who have previously worked night shifts are being assigned a set of different shifts.

  17. Physical workload, trapezius muscle activity, and neck pain in nurses' night and day shifts: a physiological evaluation.

    Science.gov (United States)

    Nicoletti, Corinne; Spengler, Christina M; Läubli, Thomas

    2014-05-01

    The purpose of this study was to compare physical workload, electromyography (EMG) of the trapezius muscle, neck pain and mental well-being at work between night and day shifts in twenty Swiss nurses. Work pulse (average increase of heart rate over resting heart rate) was lower during night (27 bpm) compared to day shifts (34 bpm; p night (82% of average) compared to day shifts (110%; p night shifts. Trapezius muscle rest time was longer during night (13% of shift duration) than day shifts (7%; p night shifts. Neck pain and mental well-being at work were similar between shifts. Subjective perception of burden was similar between shifts despite less physical burden at night, suggesting there are other contributing factors. Copyright © 2013 Elsevier Ltd and The Ergonomics Society. All rights reserved.

  18. The impact of night-shift work on platelet function in healthy medical staff.

    Science.gov (United States)

    Nakao, Tomoko; Yasumoto, Atsushi; Tokuoka, Suzumi; Kita, Yoshihiro; Kawahara, Takuya; Daimon, Masao; Yatomi, Yutaka

    2018-04-18

    Rotating shift work has been reported to increase the risk of cardiovascular diseases. Vascular endothelial dysfunction and platelet activation are among the leading causes of thrombus formation in patients with myocardial infarction or stroke. Endothelial function has been shown to be impaired immediately after night-shift work; however, it is not known whether platelets are also activated. The aim of this study was to investigate the acute impact of night-shift work on platelet function. This observational study included 11 healthy medical staff members (seven women, median age 32 years). We examined each subject's platelet aggregation rates and the serum concentrations of eicosanoid mediators after night-shift work and on day-shift work without preceding night-shift work (baseline). Platelet aggregation did not differ from baseline levels after night-shift work. However, serum cyclooxygenase (COX)-metabolized eicosanoid mediators, particularly thromboxane (Tx) B 2 (a stable metabolite of TxA 2 and the most important marker of platelet activation), were significantly higher after the night-shift than at baseline (median 65.3 vs 180.4 ng/ml). Although platelet aggregation did not increase, there was an increase in serum COX-metabolized eicosanoid mediators such as TxB 2 in healthy medical staff after night-shift work. This platelet hypersensitivity may be one of the mechanisms underlying the significant association between night-shift work and adverse cardiovascular outcomes.

  19. Impact of night-shift work on the prevalence of erosive esophagitis in shipyard male workers.

    Science.gov (United States)

    Chung, Tae Heum; Lee, Jiho; Kim, Moon Chan

    2016-08-01

    Whether night-shift work is a risk factor for gastroesophageal reflux disease is controversial. The aim of this study was to investigate the association between night-shift work and other factors, and erosive esophagitis. A cross-sectional study with 6040 male shipyard workers was performed. Esophagogastroduodenoscopic examination and a survey about night-shift work status, lifestyle, medical history, educational status, and marital status were conducted in all workers. The odds ratios of erosive esophagitis according to night-shift work status were calculated by using the logistic regression model. The prevalence of erosive esophagitis increased in the night-shift workers [odds ratio, 95 % confidence interval: 1.41 (1.03-1.94)]. According to multiple logistic regression models, night-shift work, obesity, smoking, and alcohol consumption of ≥140 g/week were significant risk factors for erosive esophagitis. By contrast, Helicobacter pylori infection was negatively associated with erosive esophagitis. Night-shift work is suggested to be a risk factor for erosive esophagitis. Avoidance of night-shift work and lifestyle modification should be considered for prevention and management of gastroesophageal reflux disease.

  20. Night work and BMI: is it related to on-shift napping?

    Directory of Open Access Journals (Sweden)

    Aline Silva-Costa

    2017-11-01

    Full Text Available ABSTRACT On-shift napping can benefit night workers regarding sleep loss, synchronization of circadian rhythms, and alertness. However, few studies on napping can be found in the literature focused on possible health benefits. This cross-sectional study has investigated the role of on-shift napping on the association between night work and BMI in 409 night-shift nursing professionals. The number of working nights and the years of exposure to night work were significantly associated with increased BMI levels among non-nappers, but not among nappers. Results suggest a benefit of napping for weight gain, thus subsidizing occupational health policies on the regulation of on-shift napping among nursing workers.

  1. Night work and BMI: is it related to on-shift napping?

    Science.gov (United States)

    Silva-Costa, Aline; Griep, Rosane Härter; Rotenberg, Lúcia

    2017-11-17

    On-shift napping can benefit night workers regarding sleep loss, synchronization of circadian rhythms, and alertness. However, few studies on napping can be found in the literature focused on possible health benefits. This cross-sectional study has investigated the role of on-shift napping on the association between night work and BMI in 409 night-shift nursing professionals. The number of working nights and the years of exposure to night work were significantly associated with increased BMI levels among non-nappers, but not among nappers. Results suggest a benefit of napping for weight gain, thus subsidizing occupational health policies on the regulation of on-shift napping among nursing workers.

  2. Does night-shift work induce apnea events in obstructive sleep apnea patients?

    Science.gov (United States)

    Laudencka, A; Klawe, J J; Tafil-Klawe, M; Złomańczuk, P

    2007-11-01

    The aim of the present study was to determine the direct effect of night-work on the occurrence of obstructive apneas during sleep after a night shift in fast-rotating shift workers with sleep-related breathing disorders. Eight obstructive sleep apnea patients were examined with the use of a polysomnograph during sleep under two conditions: after day-shift work and after night-shift work. Both sleep studies were conducted within 2 to 3 weeks of each other. In four of the 8 subjects, during sleep after a night-shift, an increase in apnea/hypopnea index was found. Night work significantly increased several breathing variables: total duration of obstructive apneas during REM sleep, mean duration of obstructive apneas during arousal, and apnea index during arousal. We conclude that in a subpopulation of sleep apnea patients, acute sleep deprivation may worsen obstructive sleep apnea index.

  3. Effects of Shift Work on the Postural and Psychomotor Performance of Night Workers.

    Science.gov (United States)

    Narciso, Fernanda Veruska; Barela, José A; Aguiar, Stefane A; Carvalho, Adriana N S; Tufik, Sergio; de Mello, Marco Túlio

    2016-01-01

    The purpose of the study was to investigate the effects of shift work on the psychomotor and postural performance of night workers. The study included 20 polysomnography technicians working schedule of 12-h night shift by 36-h off. On the first day of protocol, the body mass and height were measured, and an actigraph was placed on the wrist of each participant. On the second day of protocol, sleepiness by Karolinska Sleepiness Scale, postural control by force platform (30 seconds) and psychomotor performance by Psychomotor Vigilance Task (10 minutes) were measured before and after 12-h night work. Results showed that after 12-h night work, sleepiness increased by 59% (pwork system and sleepiness showed a negative impact in postural and psychomotor vigilance performance of night workers. As unexpected, the force platform was feasibility to detect sleepiness in this population, underscoring the possibility of using this method in the workplace to prevent occupational injuries and accidents.

  4. Astronomy Meets the Environmental Sciences: Using GLOBE at Night Data

    Science.gov (United States)

    Barringer, D.; Walker, C. E.; Pompea, S. M.; Sparks, R. T.

    2011-09-01

    The GLOBE at Night database now contains over 52,000 observations from the five annual two-week campaigns. It can be used as a resource to explore various issues related to light pollution and our environment. Students can compare data over time to look for changes and trends. For example, they can compare the data to population density or with nighttime photography and spectroscopy of lights. The data can be used in a lighting survey, to search for dark sky oases or to monitor ordinance compliance. Students can study effects of light pollution on animals, plants, human health, safety, security, energy consumption, and cost. As an example, we used data from the GLOBE at Night project and telemetry tracking data of lesser long-nosed bats obtained by the Arizona Game and Fish Department to study the effects of light pollution on the flight paths of the bats between their day roosts and night foraging areas around the city of Tucson, AZ. With the visual limiting magnitude data from GLOBE at Night, we ran a compositional analysis with respect to the bats' flight paths to determine whether the bats were selecting for or against flight through regions of particular night sky brightness levels. We found that the bats selected for the regions in which the limiting sky magnitudes fell between the ranges of 2.8-3.0 to 3.6-3.8 and 4.4-4.6 to 5.0-5.2, suggesting that the lesser long-nosed bat can tolerate a fair degree of urbanization. We also compared this result to contour maps created with digital Sky Quality Meter (http://www.unihedron.com) data.

  5. Operator performance on the night shift: phases 1 and 2

    International Nuclear Information System (INIS)

    Morisseau, Dolores; Beere, Barnaby; Collier, Steve

    1999-04-01

    The objective of the project on operator performance on the night shift is to determine the effects of circadian rhythms on higher order cognitive processes. The project had two preliminary phases. Subjects were operators from the Halden Boiling Water Reactor, (Phase 1: 7 male operators and shift leaders, aged 26 to 35; Phase 2: 8 male operators and shift leaders, aged 26 to 53). The majority of the operators were the same for both studies. The preliminary work established that Norwegian operators' circadian rhythms fall within universal population norms and, thus, they are suitable subjects for such experiments. During Phase 1, two self-assessment instruments, the Stanford Sleepiness Scale (SSS) and the Global Vigour and Affect Scale (GVA), were administered every hour on all three shifts at the reactor. During Phase 2, three tests from the Walter Reed Performance Assessment Battery were administered at the beginning, middle, and end of each of the three shifts at the reactor. The tests (Serial Add-Subtract, Two-Column Addition, and Logical Reasoning) were administered using a hand-held computer. Both phases were conducted during regular work shifts for one complete shift rota (six weeks). ANOVA with two repeated measures showed that self-reported sleepiness on the night shift, sleepiness with respect to hours into the shift, and the interaction between them all reached statistical significance at p<.001. Data analyses (ANOVA) from Phase 2 indicate that the main effect of SHIFTNO (morning, afternoon, evening) on response times was significant (p<.002); the interaction between SHIFTNO and TINSHIFT (hours into shift) was also significant (p<.009). None of the effects on correctness of response was significant (Phase 2). While correctness of response was not significant for routine cognitive measures, the significant, progressive slowing of response times on the night shift reinforces the concern for possible performance decrements on the night shift. Thus, it

  6. [NIGHT SHIFT WORK AND HEALTH DISORDER RISK IN FEMALE WORKERS].

    Science.gov (United States)

    Kukhtina, E G; Solionova, L G; Fedichkina, T P; Zykova, I E

    2015-01-01

    There was evaluated the risk to health in females employed in shift work, including night shifts. According to the data of periodical medical examinations health indices of 403 females employed in shift work, including night shifts, were compared with indices of 205 females--workers of administrative units of the same enterprise. Overall relative risk (RR) for the health disorder associated with the night shift was 1.2 (95%; confidence interval (CI): 1.09-1.28). A statistically significant increase in risk was observed in relation to uterine fibroids (OR 1.3; 95% CI: 1.06-1.54), mastopathy (OR 1.4; 95% CI: 1.2-1.6), inorganic sleep disorders (OR 8.8; 95% CI 2.6-29.8). At the boundary of the statistical significance there was the increase in the risk for obesity (OR 1.2; 95% C: 0.97-1.39), hypertension (OR 1.2; 95% CI, 0.9-1.5) and endometriosis (OR 1.5; 95% CI: 0.98-2.16). There was revealed an adverse effect of night shifts on the gestation course: ectopic pregnancy in the experimental group occurred 6.6 times more frequently than in the control group (95% CI: 0.87-50.2), and spontaneous abortion--1.7 times (95% CI: 0.95-3.22). The performed study has once again confirmed the negative impact of smoking on women's reproductive health: smoking women in the experimental group compared with the control group smokers had 2.7 times increased risk of uterine fibroids (within 1.06-7.0), the risk in non-smokers was significantly lower--1.2 (0.98-1.4). The findings suggest about a wide range of health problems related to employment on shift work, including night shifts, which indicates to the need for adoption of regulatory and preventive measures aimed to this professional group.

  7. Day versus night laparoscopic cholecystectomy for acute cholecystitis: A comparison of outcomes and cost.

    Science.gov (United States)

    Siada, Sammy S; Schaetzel, Shaina S; Chen, Allen K; Hoang, Huy D; Wilder, Fatima G; Dirks, Rachel C; Kaups, Krista L; Davis, James W

    2017-12-01

    Recent studies have suggested higher complication and conversion to open rates for nighttime laparoscopic cholecystectomy (LC) and recommend against the practice. We hypothesize that patients undergoing night LC for acute cholecystitis have decreased hospital length of stay and cost with no difference in complication and conversion rates. A retrospective review of patients with acute cholecystitis who underwent LC from October 2011 through June 2015 was performed. Complication rates, length of stay, and cost of hospitalization were compared between patients undergoing day cholecystectomy and night cholecystectomy. Complication rates and costs did not differ between the day and night groups. Length of stay was shorter in the night group (2.4 vs 2.8 days, p = 0.002). Performing LC for acute cholecystitis during night-time hours does not increase risk of complications and decreases length of stay. Copyright © 2017 Elsevier Inc. All rights reserved.

  8. Association of Rotating Night Shift Work with BMI and Abdominal Obesity among Nurses and Midwives.

    Science.gov (United States)

    Peplonska, Beata; Bukowska, Agnieszka; Sobala, Wojciech

    2015-01-01

    Mounting epidemiological evidence suggests that night shift work may contribute to the etiology of increased body weight. The present study aimed to examine association between rotating night shift work and body mass index (BMI), and abdominal adiposity respectively among nurses and midwives. A cross-sectional study was conducted among 724 female nurses and midwives, aged 40-60 years (354 rotating night shift and 370 daytime workers) in Łódź, Poland, between 2008 and 2011. Information about occupational history and potential confounders was collected during personal interviews. Anthropometric measurements of body weight, height, waist (WC) and hip (HC) circumference were made, and body mass index (BMI), waist to hip ratio (WHR) and waist to height ratio (WHtR) were calculated. GLM regression models and multinomial logit regression models were fitted to explore the association between night shift work and anthropometric parameters, with adjustment for age, body silhouette at age 20, current smoking status, packyears, marital status, and menopausal hormone therapy use. Cumulative night shift work showed significant associations with BMI, WC, HC and WHtR, with BMI increasing by 0.477 kg/m2 per 1000 night duties and by 0.432 kg/m2 per 10000 night shift hours, WC increasing respectively by 1.089 cm and 0.99 cm, and HC by 0.72 cm and WHtR by 0.007 cm for both metrics. Both current and cumulative night work was associated with obesity (BMI≥30kg/m2), with OR=3.9 (95%CI:1.5-9.9), in women reporting eight or more night shifts per month. The results of the study support the previously reported relations between night shift work and development of obesity.

  9. Night eating syndrome: How to treat it?

    Directory of Open Access Journals (Sweden)

    Thisciane Ferreira Pinto

    Full Text Available Summary Night eating syndrome (NES is characterized by caloric intake ≥ 25% of total daily after dinner and/or by two or more weekly nocturnal awakenings accompanied by food ingestion. Causes of NES are not entirely clear and seem to involve a desynchronization between the circadian rhythms of food ingestion and sleep, resulting in a delayed pattern of food intake. Estimates of the prevalence of NES in the general population are around 1.5%, and although much higher frequencies have been described in obese individuals, a causal relationship between NES and obesity is not clearly established. Since the first NES reports, several treatment modalities have been proposed, although, in many cases, the evidence is still insufficient and there is no consensus on the ideal approach. In order to conduct a critical review of proposed treatments for NES since its original description, a systematic search of articles published in journals indexed in Medline/Pubmed database in the period 1955-2015 was performed. Seventeen articles addressing non-pharmacological and pharmacological therapies met the selection criteria. Based on the articles analyzed, we conclude that serotonergic agents and psychological interventions, particularly cognitive behavioral therapy, have been shown to be effective for the treatment of NES. A combination of non-pharmacological and pharmacological therapies must be considered in future studies on the treatment of these patients.

  10. The acute physiological stress response to an emergency alarm and mobilization during the day and at night.

    Science.gov (United States)

    Hall, Sarah J; Aisbett, Brad; Tait, Jamie L; Turner, Anne I; Ferguson, Sally A; Main, Luana C

    2016-01-01

    The purpose of this study was to investigate the acute physiological stress response to an emergency alarm and mobilization during the day and at night. Sixteen healthy males aged 25 ± 4 years (mean ± SD) spent four consecutive days and nights in a sleep laboratory. This research used a within-participants design with repeated measures for time, alarm condition (alarm or control), and trial (day or night). When an alarm sounded, participants were required to mobilize immediately. Saliva samples for cortisol analysis were collected 0 min, 15 min, 30 min, 45 min, 60 min, 90 min, and 120 min after mobilization, and at corresponding times in control conditions. Heart rate was measured continuously throughout the study. Heart rate was higher in the day (F(20,442) = 9.140, P night (F(23,459) = 8.356, P day alarm and day control conditions. Cortisol was higher (F(6,183) = 2.450, P night alarm and mobilization compared to the night control condition. The magnitude of difference in cortisol between night control and night alarm conditions was greater (F(6,174) = 4.071, P day control and day alarm conditions. The augmented heart rate response to the day and night alarms supports previous observations in field settings. Variations in the cortisol responses between conditions across the day and night may relate to differences in participants' ability to interpret the alarm when sleeping versus when awake.

  11. Comparative study of alertness and performance on 8-hour and 12-hour evening and night shifts for nuclear power plant operators

    International Nuclear Information System (INIS)

    Baker, T.L.

    1990-01-01

    Twenty males aged 25-40 years, many with extensive shiftwork and/or power plant operations experience, volunteered for a laboratory study to compare 8-hour and 12-hour shift schedules. Experiments were conducted in workplace simulation laboratories of the Human Alertness Research Center (HARC) at the Institute for Circadian Physiology in Boston, MA. This unique facility includes a simulated control room with process control simulator, control panels, and self-contained residential apartments where subjects sleep and spend off-duty hours. The design of the study is described. Subjects learn the operation of the process control simulator in multiple practice sessions prior to the experiment. They also practice computer-based performance tests, learn work shift protocols and assignments, and procedures for keeping subjective rating scales for alertness, mood and performance. By the time the first experimental shift begins, all subjects are prepared to perform their simulated work shift duties. These duties include monitoring of four video display terminals for silent (visual cues only) and auditory (visual and auditory) alarms, acknowledging the alarms with computer controls, and keeping log records of alarm activity. The process control simulator simultaneously keeps records of subject performance of these tasks by recording storing all times of alarm activity and alarm acknowledgement by the subject

  12. Night shift work at specific age ranges and chronic disease risk factors

    Science.gov (United States)

    Ramin, Cody; Devore, Elizabeth E; Wang, Weike; Pierre-Paul, Jeffrey; Wegrzyn, Lani R; Schernhammer, Eva S

    2014-01-01

    Objectives We examined the association of night shift work history and age when night shift work was performed with cancer and cardiovascular disease risk factors among 54 724 women in the Nurses' Health Study (NHS) II. Methods We calculated age-adjusted and socioeconomic status-adjusted means and percentages for cancer and cardiovascular risk factors in 2009 across categories of night shift work history. We used multivariable-adjusted logistic regression to estimate odds ratios (ORs) and 95% CIs for key risk factors among 54 724 participants (72% ever shift workers). We further examined these associations by age (20–25, 26–35, 36– 45 and 46+ years) at which shift work was performed. Results Ever night shift workers had increased odds of obesity (body mass index ≥30 kg/m2; OR=1.37, 95% CI 1.31 to 1.43); higher caffeine intake (≥131 mg/day; OR=1.16, 95% CI 1.12 to 1.22) and total calorie intake (≥1715 kcal/day; OR=1.09, 95% CI 1.04 to 1.13); current smoking (OR=1.30, 95% CI 1.19 to 1.42); and shorter sleep durations (≤7 h of sleep/day; OR=1.19, 95% CI 1.15 to 1.24) compared to never night shift workers. These estimates varied depending on age at which night work was performed, with a suggestion that night shift work before age 25 was associated with fewer risk factors compared to night shift work at older ages. Conclusions Our results indicate that night shift work may contribute to an adverse chronic disease risk profile, and that risk factors may vary depending on the age at which night shift work was performed. PMID:25261528

  13. The Role of Logistics in Practical Levelized Cost of Energy Reduction Implementation and Government Sponsored Cost Reduction Studies: Day and Night in Offshore Wind Operations and Maintenance Logistics

    DEFF Research Database (Denmark)

    Poulsen, Thomas; Hasager, Charlotte Bay; Jensen, Christian Munk

    2017-01-01

    This paper reveals that logistics make up at least 17% of annual operational expenditure costs for offshore wind farms. Annual operational expenditure is found to vary by a factor of 9.5, making its share of levelized cost of energy for offshore wind range from 13% to 57%. These are key findings...... contrast to the shore-based office personnel who develop studies directing cost reduction efforts. This paper details the company motivation to join industry-wide cost reduction initiatives. A business case for offshore wind operations and maintenance logistics yielding 1% savings in levelized cost...... of a 20-month research project targeting cost reduction initiatives for offshore wind systems. The findings reveal that cost-out measures are difficult to implement due to cultural differences. Implementation efforts are rendered by personnel located offshore in a harsh sea environment which is in stark...

  14. What is the preferred number of consecutive night shifts?

    DEFF Research Database (Denmark)

    Nabe-Nielsen, Kirsten; Jensen, Marie Aarrebo; Hansen, Åse Marie

    2016-01-01

    % preferred '2 + 2' and 26% preferred '7 + 7'. Participants, who preferred longer spells of night work experienced that night work was less demanding, found it easier to sleep at different times of the day, and were more frequently evening types compared with participants who preferred shorter spells of night...... the longer spells of night work found night work less demanding, found it easier to sleep at different times of the day, and were more frequently evening types....

  15. Radicals in the marine boundary layer during NEAQS 2004: a model study of day-time and night-time sources and sinks

    Directory of Open Access Journals (Sweden)

    R. Sommariva

    2009-05-01

    Full Text Available This paper describes a modelling study of several HOx and NOx species (OH, HO2, organic peroxy radicals, NO3 and N2O5 in the marine boundary layer. A model based upon the Master Chemical Mechanism (MCM was constrained to observations of chemical and physical parameters made onboard the NOAA ship R/V Brown as part of the New England Air Quality Study (NEAQS in the summer of 2004. The model was used to calculate [OH] and to determine the composition of the peroxy radical pool. Modelled [NO3] and [N2O5] were compared to in-situ measurements by Cavity Ring-Down Spectroscopy. The comparison showed that the model generally overestimated the measurements by 30–50%, on average.

    The model results were analyzed with respect to several chemical and physical parameters, including uptake of NO3 and N2O5 on fog droplets and on aerosol, dry deposition of NO3 and N2O5, gas-phase hydrolysis of N2O5 and reactions of NO3 with NMHCs and peroxy radicals. The results suggest that fog, when present, is an important sink for N2O5 via rapid heterogeneous uptake. The comparison between the model and the measurements were consistent with values of the heterogeneous uptake coefficient of N2O5N2O5>1×10−2, independent of aerosol composition in this marine environment. The analysis of the different loss processes of the nitrate radical showed the important role of the organic peroxy radicals, which accounted for a significant fraction (median: 15% of NO3 gas-phase removal, particularly in the presence of high concentrations of dimethyl sulphide (DMS.

  16. Multitudes attend the Night of Science

    CERN Multimedia

    2006-01-01

    The Night of Science, which took place in the Parc de la Perle du Lac in Geneva last weekend, was a great success, with 30 000 visitors attending according to the organisers. Many curious people flocked to the stands and animations until late on Saturday night and all afternoon on Sunday. The CERN stand (photo) received a great amount of interest from participants. Both kids and adults discovered the activities of the Laboratory and the data-processing revolution initiated by CERN, from the Web to the Computing Grid. Hats off to the CERN collaborators in the Communication Group and IT Department who made this event a success.

  17. Sira Nights as a Recreational Tourism Activity

    OpenAIRE

    Barakazı, Mahmut; Önçel, Sibel

    2017-01-01

    In terms of culture, art and gastronomy, Urfa sira nights are the basis for an important recreational activity. Recreational activities in these regions provide tourism awareness, as well as the benefits of introducing local Urfa cuisine, which is very rich in culinary culture, and Gastronomy leads to the recognition of tourism in the region. The aim of this research is to encourage recreational activities by promoting recreational activities such as Urfa sira 'nights' effects on ga...

  18. Difference in initial dental biofilm accumulation between night and day

    DEFF Research Database (Denmark)

    Dige, Irene; Schlafer, Sebastian; Nyvad, Bente

    2012-01-01

    formed during day and night. We hypothesised that there is a diurnal variation in the rate of accumulation of bacteria on solid surfaces in the oral cavity. Material and methods. In situ biofilm from healthy individuals was collected for 12 h during day and night, respectively, subjected to fluorescent......Objective. The study of initial microbial colonization on dental surfaces is a field of intensive research because of the aetiological role of biofilms in oral diseases. Most previous studies of de novo accumulation and composition of dental biofilms in vivo do not differentiate between biofilms...... in situ hybridization, and visualized using confocal laser scanning microscopy. Results. Analysis of the biofilms using stereological methods and digital image analysis revealed a consistent statistically significant difference between both the total number of bacteria and the biovolume in the two 12-h...

  19. Rotating night shift work, sleep quality, selected lifestyle factors and prolactin concentration in nurses and midwives.

    Science.gov (United States)

    Bukowska, Agnieszka; Sobala, Wojciech; Peplonska, Beata

    2015-04-01

    The pattern of secretion of many hormones, including prolactin, is dependent on the circadian rhythm. Night shift work involves exposure to artificial light at night and sleep deficiency, which in turn can affect prolactin synthesis. The aim of this study was to evaluate a possible association between night shift work characteristics, sleep quality, lifestyle factors and prolactin concentration, using data from a cross-sectional study of nurses and midwives. A cross-sectional study was conducted among 327 nurses and midwives currently working on rotating night shifts, and 330 nurses and midwives working during the day (aged 40-60 years) (388 premenopausal and 269 postmenopausal). Information about night shift work characteristics, lifestyle, reproductive factors, sleep pattern and other covariates was collected through a face-to-face interview, and from a one-week work and sleep diary completed by the subjects. Weight and height were measured. Prolactin concentration was measured in the morning blood sample using the electrochemiluminesence immunoassay method. Associations were analyzed using linear regression models adjusted for important confounders. Analyses were carried out separately in pre- and postmenopausal women. None of the night shift work or sleep characteristics was significantly associated with prolactin concentration. Prolactin concentration was significantly (p night shift work is not associated with prolactin concentration. Smoking, parity, time of blood collection and age among postmenopausal women were significant determinants of prolactin.

  20. Comparison of daytime and night-time populations adjacent to interstate highways in metropolitan areas

    International Nuclear Information System (INIS)

    Mills, G.S.; Neuhauser, K.S.

    1999-01-01

    Daytime and night-time population densities bordering Interstate highway routes in metropolitan areas are compared at the traffic analysis zone level. In three of the metropolitan areas studied, histograms of daytime to night-time population density ratios are peaked at 1.0. In a smaller metropolitan area, the peak of the histogram moves to values greater than 1.0 but less than 2.0. In view of the typical uncertainties in calculating radiological transport effects (∼2), this study indicates that a distinction between daytime and night-time transport is not warranted, especially since a typical route includes extensive transport outside metropolitan areas. (author)

  1. Who is sleepier on the night shift? The influence of bio-psycho-social factors on subjective sleepiness of female nurses during the night shift.

    Science.gov (United States)

    Zion, Nataly; Drach-Zahavy, Anat; Shochat, Tamar

    2018-07-01

    Sleepiness is a common complaint during the night shift and may impair performance. The current study aims to identify bio-psycho-social factors associated with subjective sleepiness during the night shift. Ninety-two female nurses working rotating shifts completed a sociodemographic questionnaire, the Munich ChronoType Questionaire for shift workers, the Pittsburg Sleep Quality Index, and the Pre-sleep Arousal Scale. Subjective sleepiness was measured hourly during two night shifts using the Karolinska Sleepiness Scale, and activity monitors assessed sleep duration 24-h before each shift. Findings showed that increased sleepiness was associated with increased age in nurses with early chronotypes and with more children. High cognitive pre-sleep arousal, but not sleep, was associated with increased sleepiness, especially in late chronotypes. The impact of bio-psycho-social factors on night shift sleepiness is complex, and depends on mutual interactions between these factors. Nurses most prone to increased sleepiness must develop personal strategies for maintaining vigilance on the night shift. Practitioner Summary: This study aims to identify bio-psycho-social factors associated with subjective sleepiness of female nurses during the night shift. Increasing sleepiness was associated with increased age in nurses with early chronotypes and with more children. Increased cognitive pre-sleep arousal, but not sleep, was associated with increased sleepiness, especially in late chronotypes.

  2. Day-night variation in operationally retrieved TOVS temperature biases

    Science.gov (United States)

    Kidder, Stanley Q.; Achtemeier, Gary L.

    1986-01-01

    Several authors have reported that operationally retrieved TOVS (TIROS Operational Vertical Sounder) temperatures are biased with respect to rawinsonde temperatures or temperature analyses. This note reports a case study from which it is concluded that, at least for the time period Mar. 26 through Apr. 8, 1979, there was a significant day-night variation in TOVS mean layer virtual temperature biases with respect to objective analyses of rawinsonde data over the U.S.

  3. Differences in night-time and daytime ambulatory blood pressure when diurnal periods are defined by self-report, fixed-times, and actigraphy: Improving the Detection of Hypertension study.

    Science.gov (United States)

    Booth, John N; Muntner, Paul; Abdalla, Marwah; Diaz, Keith M; Viera, Anthony J; Reynolds, Kristi; Schwartz, Joseph E; Shimbo, Daichi

    2016-02-01

    To determine whether defining diurnal periods by self-report, fixed-time, or actigraphy produce different estimates of night-time and daytime ambulatory blood pressure (ABP). Over a median of 28 days, 330 participants completed two 24-h ABP and actigraphy monitoring periods with sleep diaries. Fixed night-time and daytime periods were defined as 0000-0600 h and 1000-2000 h, respectively. Using the first ABP period, within-individual differences for mean night-time and daytime ABP and kappa statistics for night-time and daytime hypertension (systolic/diastolic ABP≥120/70 mmHg and ≥135/85 mmHg, respectively) were estimated comparing self-report, fixed-time, or actigraphy for defining diurnal periods. Reproducibility of ABP was also estimated. Within-individual mean differences in night-time systolic ABP were small, suggesting little bias, when comparing the three approaches used to define diurnal periods. The distribution of differences, represented by 95% confidence intervals (CI), in night-time systolic and diastolic ABP and daytime systolic and diastolic ABP was narrowest for self-report versus actigraphy. For example, mean differences (95% CI) in night-time systolic ABP for self-report versus fixed-time was -0.53 (-6.61, +5.56) mmHg, self-report versus actigraphy was 0.91 (-3.61, +5.43) mmHg, and fixed-time versus actigraphy was 1.43 (-5.59, +8.46) mmHg. Agreement for night-time and daytime hypertension was highest for self-report versus actigraphy: kappa statistic (95% CI) = 0.91 (0.86,0.96) and 1.00 (0.98,1.00), respectively. The reproducibility of mean ABP and hypertension categories was similar using each approach. Given the high agreement with actigraphy, these data support using self-report to define diurnal periods on ABP monitoring. Further, the use of fixed-time periods may be a reasonable alternative approach.

  4. Night work and the reproductive health of women: an integrated literature review.

    Science.gov (United States)

    Chau, Yu Moon; West, Sandra; Mapedzahama, Virginia

    2014-01-01

    The aim of this review was to synthesize current evidence on the effects of night work on the major stages of women's reproductive health, specifically the menstrual cycle, fertility, pregnancy, and menopause. Current understanding suggests that night work (work that causes disruption of a worker's circadian [day/night] rhythms) adversely affects workers' health and well-being. A complex relationship exists between circadian rhythms and reproductive hormones, and this may potentially increase the vulnerability of women to the detrimental effect of night work, including during menopause. A systematic search was conducted (March-May 2011) via CINAHL, MEDLINE, Sociological Abstracts, and Business Source Premier for primary research studies written in English using the key words "shift-work" and "female/women." Findings of identified articles were themed to pregnancy, fertility, aspects of menstrual cycles, and menopause. Twenty articles were identified, (13 articles concerning pregnancy, 3 addressing fertility, and 4 addressing aspects of the menstrual cycle) but no studies addressing menopause were located. All identified articles demonstrated problematic approaches to the determination of night-work exposure. Evidence of the impact of night work on female reproductive health as presented in the current literature is inconclusive. Moreover, available evidence needs to be interpreted with caution, given the various limitations and inconsistencies among the studies in the measurement of night-work exposure and shift-work patterns. Studies that focus specifically on night work are needed to facilitate an understanding of the impact of circadian disruption on the reproductive health of women undertaking night work. © 2013 by the American College of Nurse-Midwives.

  5. Reduced Tolerance to Night Shift in Chronic Shift Workers: Insight From Fractal Regulation.

    Science.gov (United States)

    Li, Peng; Morris, Christopher J; Patxot, Melissa; Yugay, Tatiana; Mistretta, Joseph; Purvis, Taylor E; Scheer, Frank A J L; Hu, Kun

    2017-07-01

    Healthy physiology is characterized by fractal regulation (FR) that generates similar structures in the fluctuations of physiological outputs at different time scales. Perturbed FR is associated with aging and age-related pathological conditions. Shift work, involving repeated and chronic exposure to misaligned environmental and behavioral cycles, disrupts circadian coordination. We tested whether night shifts perturb FR in motor activity and whether night shifts affect FR in chronic shift workers and non-shift workers differently. We studied 13 chronic shift workers and 14 non-shift workers as controls using both field and in-laboratory experiments. In the in-laboratory study, simulated night shifts were used to induce a misalignment between the endogenous circadian pacemaker and the sleep-wake cycles (ie, circadian misalignment) while environmental conditions and food intake were controlled. In the field study, we found that FR was robust in controls but broke down in shift workers during night shifts, leading to more random activity fluctuations as observed in patients with dementia. The night shift effect was present even 2 days after ending night shifts. The in-laboratory study confirmed that night shifts perturbed FR in chronic shift workers and showed that FR in controls was more resilience to the circadian misalignment. Moreover, FR during real and simulated night shifts was more perturbed in those who started shift work at older ages. Chronic shift work causes night shift intolerance, which is probably linked to the degraded plasticity of the circadian control system. © Sleep Research Society 2017. Published by Oxford University Press on behalf of the Sleep Research Society. All rights reserved. For permissions, please e-mail journals.permissions@oup.com.

  6. Night sky a field guide to the constellations

    CERN Document Server

    Poppele, Jonathan

    2009-01-01

    Stargazing is among the most peaceful and inspiring outdoor activities. Night Sky, the award-winning book by Jonathan Poppele, makes it more fun than ever! Take a simple approach to finding 62 constellations by focusing on one constellation at a time, instead of attempting to study dizzying charts. Start with the easy-to-find constellations during each season and work toward the more difficult ones. Better yet, you'll learn how to locate any constellation in relation to the Big Dipper, the North Star and the top of the sky. With two ways to locate each constellation, you'll know where in the sky to look and what to look for! Along the way, you'll be introduced to mythology, facts and tidbits, as well as details about the planets, solar system and more! As an added bonus, the book comes with a red-light flashlight for night reading.

  7. Characterizing recovery of sleep after four successive night shifts.

    Science.gov (United States)

    Kubo, Tomohide; Takahashi, Masaya; Tachi, Norihide; Takeyama, Hidemaro; Ebara, Takeshi; Inoue, Tatsuki; Takanishi, Toshimasa; Murasaki, Gen-i; Itani, Toru

    2009-10-01

    The purpose of this study was to characterize the recovery pattern of sleep following simulated, four successive night shifts in ten healthy men (22.9 + or - 3.2 yr). Poor sleep was defined as sleep efficiency of 80% or lower as determined actigraphically. The results showed that four (rapid, slow, pseudo, and incomplete) patterns of sleep recovery were observed over three recovery sleep periods. The rapid and slow recovery pattern represented immediate and slow return to baseline level prior to the nightshifts, respectively. The pseudo recovery pattern demonstrated poor sleep at the 3rd recovery sleep period, despite transient recovery at the 2nd sleep period. The incomplete recovery pattern was characterized by consistently poorer sleep during the entire recovery period. The correlation analysis indicated that sleep habits (bed time and variation of wake time) prior to the experiment were significantly related to the recovery patterns, rather than performance and alertness during the night shifts.

  8. Circadian gene expression in peripheral blood leukocytes of rotating night shift nurses.

    Science.gov (United States)

    Reszka, Edyta; Peplonska, Beata; Wieczorek, Edyta; Sobala, Wojciech; Bukowska, Agnieszka; Gromadzinska, Jolanta; Lie, Jenny-Anne; Kjuus, Helge; Wasowicz, Wojciech

    2013-03-01

    It has been hypothesized that the underlying mechanism of elevated breast cancer risk among long-term, night-working women involves circadian genes expression alteration caused by exposure to light at night and/or irregular work hours. The aim of the present study was to determine the effect of rotating night shift work on expression of selected core circadian genes. The cross-sectional study was conducted on 184 matched nurses and midwives, who currently work either day or rotating night shifts, to determine the effect of irregular work at night on circadian gene expression in peripheral blood leukocytes. Transcript levels of BMAL1, CLOCK, CRY1, CRY2, PER1, PER2, and PER3 were determined by means of quantitative real-time polymerase chain reaction (PCR). After adjusting for hour of blood collection, there were no statistically significant changes of investigated circadian genes among nurses and midwives currently working rotating night shifts compared to nurses working day shifts. The highest expression of PER1 messenger ribonucleic acid (mRNA) was observed for women currently working shifts who had worked >15 years in rotating night shift work. PER1 gene expression was associated with the lifetime duration of rotating night shift work among women currently working night shifts (P=0.04). PER1 and PER3 transcript levels in blood leukocytes were significantly down-regulated in the later versus early hours of the morning between 06.00-10.00 hours (β-coefficient -0.226, P=0.001 and β-coefficient -0.181, Pnight shift work does not affect circadian gene expression in human circulating leukocytes. In analysis of the peripheral clock in human studies, the hour of blood collection should be precisely specified.

  9. Sirius brightest diamond in the night sky

    CERN Document Server

    Holberg, Jay B

    2007-01-01

    This book describes why Sirius has been regarded as an important fixture of the night sky since the beginnings of history. It also examines the part that Sirius has played in how we came to achieve our current scientific understanding of stars.

  10. Why Is the Sky Dark at Night?

    Science.gov (United States)

    Stinner, Arthur

    2014-01-01

    The puzzle as to just why the sky is dark at night, given that there are so many stars, has been around at least since Newton. This article summarizes six cosmological models that have been used to attempt to give an account of this puzzle including the Copernican universe, the Newton-Halley universe, the nineteenth century "one galaxy"…

  11. Portable real-time color night vision

    NARCIS (Netherlands)

    Toet, A.; Hogervorst, M.A.

    2008-01-01

    We developed a simple and fast lookup-table based method to derive and apply natural daylight colors to multi-band night-time images. The method deploys an optimal color transformation derived from a set of samples taken from a daytime color reference image. The colors in the resulting colorized

  12. Family Literacy Night: A Celebration of Reading!

    Science.gov (United States)

    Campbell, Becky; Morton, Shirley; Rumschlag, Hella

    2011-01-01

    Family Literacy Night is an exciting way to engage students and their parents in meaningful literacy activities while building community spirit and strengthening the partnership between school and home. It is an opportunity for students to show their parents what they do in school; how they create in the computer lab, how they work in the art…

  13. Science by night – it's magic!

    CERN Document Server

    CERN Bulletin

    2010-01-01

    The control rooms of the LHC and its experiments threw open their doors to 150 youngsters on European Researchers Night and the place was buzzing with excitement all evening!    It's just possible that a few scientists' vocations were born last Friday night, as the sixth European Researchers Night took place across Europe. CERN was taking part for the first time and invited young people aged from 12 to 19 into the control rooms of the LHC machine and five experiments. From 5.00 in the afternoon until 1.00 in the morning, 150 youngsters and physics teachers got the opportunity to sit with scientists at the controls of the accelerator and experiments. This meeting of minds went down very well for all concerned, the scientists being only too happy to wax lyrical about their passion. The youngsters were thrilled with their visit and amazed at being allowed so close to the controls of these mighty machines. The night-time setting added an extra touch of magic to the whole event. Some just could...

  14. Early Birds by Light at Night

    NARCIS (Netherlands)

    Jong, De Maaike; Caro, Samuel P.; Gienapp, Phillip; Spoelstra, Kamiel; Visser, Marcel E.

    2017-01-01

    Artificial light at night disturbs the daily rhythms of many organisms. To what extent this disturbance depends on the intensity and spectral composition of light remain obscure. Here, we measured daily activity patterns of captive blue tits (Cyanistes caeruleus) exposed to similar intensities of

  15. Night Vision Manual for the Flight Surgeon.

    Science.gov (United States)

    1985-08-01

    macula and fovea centralis. 4. Duality theory of vision-extends sensitivity of vision over 100,000 times (Fig. 12). ~Im Uilting Ullmlrage WVIVIWCentral...lowered night vision capa- bilities due to disease or degenerations . F. Hypoxia 1. Decrement of central vision due to 02 lack is quite small; such as, at

  16. Evolution of the ATLAS Nightly Build System

    International Nuclear Information System (INIS)

    Undrus, A

    2012-01-01

    The ATLAS Nightly Build System is a major component in the ATLAS collaborative software organization, validation, and code approval scheme. For over 10 years of development it has evolved into a factory for automatic release production and grid distribution. The 50 multi-platform branches of ATLAS releases provide vast opportunities for testing new packages, verification of patches to existing software, and migration to new platforms and compilers for ATLAS code that currently contains 2200 packages with 4 million C++ and 1.4 million python scripting lines written by about 1000 developers. Recent development was focused on the integration of ATLAS Nightly Build and Installation systems. The nightly releases are distributed and validated and some are transformed into stable releases used for data processing worldwide. The ATLAS Nightly System is managed by the NICOS control tool on a computing farm with 50 powerful multiprocessor nodes. NICOS provides the fully automated framework for the release builds, testing, and creation of distribution kits. The ATN testing framework of the Nightly System runs unit and integration tests in parallel suites, fully utilizing the resources of multi-core machines, and provides the first results even before compilations complete. The NICOS error detection system is based on several techniques and classifies the compilation and test errors according to their severity. It is periodically tuned to place greater emphasis on certain software defects by highlighting the problems on NICOS web pages and sending automatic e-mail notifications to responsible developers. These and other recent developments will be presented and future plans will be described.

  17. Ternary rhombohedral Laves phases RE_2Rh_3Ga (RE = Y, La-Nd, Sm, Gd-Er)

    International Nuclear Information System (INIS)

    Seidel, Stefan; Benndorf, Christopher; Heletta, Lukas; Poettgen, Rainer; Eckert, Hellmut; Sao Paulo Univ., Sao Carlos

    2017-01-01

    The ordered Laves phases RE_2Rh_3Ga (RE=Y, La-Nd, Sm, Gd-Er) were synthesized by arc-melting of the elements and subsequent annealing. The samples were characterized by powder X-ray diffraction (XRD). They crystallize with the rhombohedral Mg_2Ni_3Si type structure, space group R3m. Three structures were refined from single crystal X-ray diffractometer data: a=557.1(1), c=1183.1(2), wR2=0.0591, 159 F"2 values, 10 variables for Y_2Rh_3Ga, a=562.5(2), c=1194.4(2) pm, wR2=0.0519, 206 F"2 values, 11 variables for Ce_2Rh_3Ga and a=556.7(2), c=1184.1(3) pm, wR2=0.0396, 176 F"2 values, 11 variables for Tb_2Rh_3Ga. The Rh_3Ga tetrahedra are condensed via common corners and the large cavities left by the network are filled by the rare earth atoms. The RE_2Rh_3Ga Laves phases crystallize with a translationengleiche subgroup of the cubic RERh_2 Laves phases with MgCu_2 type. Magnetic susceptibility measurements reveal Pauli paramagnetism for Y_2Rh_3Ga and La_2Rh_3Ga. Ce_2Rh_3Ga shows intermediate cerium valence while all other RE_2Rh_3Ga phases are Curie-Weiss paramagnets which order magnetically at low temperatures. The "8"9Y and "7"1Ga solid state nuclear magnetic resonance (NMR) spectra of the diamagnetic representative Y_2Rh_3Ga show well-defined single resonances in agreement with an ordered bulk phase. In comparison to the binary Laves phase YRh_2 a strongly increased "8"9Y resonance frequency is observed owing to a higher s-electron spin density at the "8"9Y nuclei as proven by density of states (DOS) calculations.

  18. Racial Differences in the Association Between Night Shift Work and Melatonin Levels Among Women

    Science.gov (United States)

    Bhatti, Parveen; Mirick, Dana K.; Davis, Scott

    2013-01-01

    Reduced suppression of melatonin in response to working the night shift among people of Asian ancestry has been suggested as a possible explanation for the null results observed in a recent analysis of shift work and breast cancer risk in a Chinese cohort. The authors analyzed the impact of Asian versus white race on previously reported differences in urinary 6-sulfatoxymelatonin levels in a 2003–2008 study in Seattle, Washington, of female health-care workers that exclusively worked night or day shifts. A total of 225 white and 51 Asian participants were included in the analysis. Although 6-sulfatoxymelatonin levels were affected by night shift work in both racial groups, Asian night shift workers consistently showed 6-sulfatoxymelatonin levels that were closer to levels in day shift workers than did white night shift workers. Furthermore, differences in 6-sulfatoxymelatonin levels between white and Asian night shift workers relative to day shift workers were statistically significant in every instance (P night shift workers may be at a reduced risk of cancer. PMID:23380044

  19. The impact of the night float system on internal medicine residency programs.

    Science.gov (United States)

    Trontell, M C; Carson, J L; Taragin, M I; Duff, A

    1991-01-01

    To study the design, method of implementation, perceived benefits, and problems associated with a night float system. Self-administered questionnaire completed by program directors, which included both structured and open-ended questions. The answers reflect resident and student opinions as well as those of the program directors, since program directors regularly obtain feedback from these groups. The 442 accredited internal medicine residency programs listed in the 1988-89 Directory of Graduate Medical Education Programs. Of the 442 programs, 79% responded, and 30% had experience with a night float system. The most frequent methods for initiating a night float system included: decreasing elective time (42.3%), hiring more residents (26.9%), creating a non-teaching service (12.5%), and reallocating housestaff time (9.6%). Positive effects cited include decreased fatigue, improved housestaff morale, improved recruiting, and better attitude toward internal medicine training. The quality of medical care was considered the same or better by most programs using it. The most commonly cited problems were decreased continuity of care, inadequate teaching of the night float team, and miscommunication. Residency programs using a night float system usually observe a positive effect on housestaff morale, recruitment, and working hours and no detrimental effect on the quality of patient care. Miscommunication and inadequate learning experience for the night float team are important potential problems. This survey suggests that the night float represents one solution to reducing resident working hours.

  20. Day-night variation in heart rate variability changes induced by endotoxaemia in healthy volunteers

    DEFF Research Database (Denmark)

    Alamili, M.; Rosenberg, J; Gögenur, I

    2015-01-01

    /night variation in endotoxaemia-induced changes in HRV. METHODS: A randomized, crossover study with 12 healthy men (age 18-31) was conducted. Endotoxaemia were induced by lipopolysaccharide (LPS) endotoxin 0.3 ng/kg b.w. in two visits (day visit and night visit). At the day visit, endotoxaemia were induced at 12...... at both night and day resulted in a significant depression in HRV parameters high-frequency power (HF), low-frequency power (LF), standard deviation of normal-to-normal (NN) intervals, root mean square of successive differences and proportion of NN50 divided by total number of NNs (P

  1. Night Airglow Observations from Orbiting Spacecraft Compared with Measurements from Rockets.

    Science.gov (United States)

    Koomen, M J; Gulledge, I S; Packer, D M; Tousey, R

    1963-06-07

    A luminous band around the night-time horizon, observed from orbiting capsules by J. H. Glenn and M. S. Carpenter, and identified as the horizon enhancement of the night airglow, is detected regularly in rocket-borne studies of night airglow. Values of luminance and dip angle of this band derived from Carpenter's observations agree remarkably well with values obtained from rocket data. The rocket results, however, do not support Carpenter's observation that the emission which he saw was largely the atomic oxygen line at 5577 A, but assign the principal luminosity to the green continuum.

  2. Company Policies on Working Hours and Night Work in Relation to Older Workers' Work Ability and Work Engagement : Results From a Dutch Longitudinal Study with 2 Year Follow-Up

    NARCIS (Netherlands)

    van der Meer, Laudry; Leijten, Fenna R M; Heuvel, Swenneke G; Ybema, J.F.; de Wind, Astrid; Burdorf, Alex; Geuskens, Goedele A

    2016-01-01

    Purpose To longitudinally investigate (1) whether lower work ability and work engagement predict the use of company policies on reduced working hours and exemption from evening/night work among older workers, and (2) whether using such policies subsequently contribute to higher work ability and work

  3. Company Policies on Working Hours and Night Work in Relation to Older Workers’ Work Ability and Work Engagement: Results From a Dutch Longitudinal Study with 2 Year Follow-Up

    NARCIS (Netherlands)

    Meer, L. van der; Leijten, F.R.; Heuvel, S.G. van den; Ybema, J.F.; Wind, A. de; Burdorf, A.; Geuskens, G.A.

    2016-01-01

    Purpose To longitudinally investigate (1) whether lower work ability and work engagement predict the use of company policies on reduced working hours and exemption from evening/night work among older workers, and (2) whether using such policies subsequently contribute to higher work ability and work

  4. Circadian variation of melatonin, light exposure, and diurnal preference in day and night shift workers of both sexes.

    Science.gov (United States)

    Papantoniou, Kyriaki; Pozo, Oscar J; Espinosa, Ana; Marcos, Josep; Castaño-Vinyals, Gemma; Basagaña, Xavier; Ribas, Ferran Calduch; Mirabent, Joan; Martín, Jordi; Carenys, Gemma; Martín, Celia Reyes; Middleton, Benita; Skene, Debra J; Kogevinas, Manolis

    2014-07-01

    Light-at-night has been shown in experimental studies to disrupt melatonin production but this has only partly been confirmed in studies of night shift workers. In this cross-sectional study, we examined the circadian variation of melatonin in relation to shift status, individual levels of light-at-night exposure, and diurnal preference, an attribute reflecting personal preference for activity in the morning or evening. One hundred and seventeen workers (75 night and 42 day) of both sexes, ages 22 to 64 years, were recruited from four companies. Participants collected urine samples from all voids over 24 hours and wore a data logger continuously recording their light exposure. Sociodemographic, occupational, lifestyle, and diurnal preference information were collected by interview. Concentrations of urinary 6-sulfatoxymelatonin (aMT6s), the main melatonin metabolite, were measured. Mean aMT6s levels were lower in night [10.9 ng/mg creatinine/hour; 95% confidence interval (CI), 9.5-12.6] compared with day workers (15.4; 95% CI, 12.3-19.3). The lowest aMT6s levels were observed in night workers with morning preference (6.4; 95% CI, 3.0-13.6). Peak time of aMT6s production occurred 3 hours later in night (08:42 hour, 95% CI, 07:48-09:42) compared with day workers (05:36 hour, 95% CI, 05:06-06:12). Phase delay was stronger among subjects with higher light-at-night exposure and number of nights worked. Night shift workers had lower levels and a delay in peak time of aMT6s production over a 24-hour period. Differences were modified by diurnal preference and intensity of light-at-night exposure. Night shift work affects levels and timing of melatonin production and both parameters may relate to future cancer risk. ©2014 American Association for Cancer Research.

  5. Does Current Scientific Evidence Support a Link Between Light at Night and Breast Cancer Among Female Night-Shift Nurses?

    Science.gov (United States)

    Dickerman, Barbra; Liu, Jianghong

    2014-01-01

    Breast cancer is increasingly prevalent in industrialized regions of the world, and exposure to light at night (LAN) has been proposed as a potential risk factor. Epidemiological observations have documented an increased breast cancer risk among female night-shift workers, and strong experimental evidence for this relationship has also been found in rodent models. Indirect support for the LAN hypothesis comes from studies involving blind women, sleep duration, bedroom light levels, and community nighttime light levels. This article reviews the literature, discusses possible mechanisms of action, and provides recommendations for occupational health nursing research, practice, and education. Research is needed to further explore the relationship between exposure to LAN and breast cancer risk and elucidate the mechanisms underlying this relationship before interventions can be designed for prevention and mitigation of breast cancer. PMID:22658734

  6. What affects the age of first sleeping through the night?

    Science.gov (United States)

    Adams, S M; Jones, D R; Esmail, A; Mitchell, E A

    2004-03-01

    To ascertain the age at which an infant first sleeps regularly through the night and the factors affecting this age. A representative cross sectional sample of 700 infants in south-east England were studied. Information was collected on 511 (73.0%) of the infants by parental interview. Obstetric records were also examined. Fifty per cent of babies slept through by 8 weeks and 75% by 12 weeks. Multivariate survival analysis used to investigate 61 potential factors found that a heavier birthweight, female gender and co-sleeping less than 2 hours or not at all; younger mothers, school leaving age less than 17 years, stress factors (divorce and no separation from partner for more than a month in the last 12 months); no central heating, and the baby not sharing a room with siblings were associated with an earlier age at which an infant first sleeps through the night. Little of the variation between children in age of first sleeping through the night could be explained by these nine factors.

  7. Is a night better than a day: Empirical evidence

    Directory of Open Access Journals (Sweden)

    A. Deshkovski

    2014-12-01

    Full Text Available In this study, we analyze the portfolio allocation based on time asymmetry of stock characteristics. In particular, we analyzed the empirical data of changes in financial stock prices during the day period and during the night period and have found that characteristics such as mean and variance are different for changes during the day and changes during the night. Also, the portfolio characteristics, such as covariance between stocks, differ on whether we take into account day changes or night changes in prices. That greatly affects the allocation of fund to the portfolio for an investor who trades frequently. The portfolio should be re-balanced every day in order to achieve optimality and much higher return. At the same level of risk the returns on this new portfolio may by several times larger than the returns on a portfolio without everyday re-balancing. We computed numerically the allocation of funds for the stocks from the finance industry and showed that the increase in returns is substantial.

  8. Optimal management of night eating syndrome: challenges and solutions

    Directory of Open Access Journals (Sweden)

    Kucukgoncu S

    2015-03-01

    Full Text Available Suat Kucukgoncu, Margaretta Midura, Cenk Tek Department of Psychiatry, Yale University, New Haven, CT, USA Abstract: Night Eating Syndrome (NES is a unique disorder characterized by a delayed pattern of food intake in which recurrent episodes of nocturnal eating and/or excessive food consumption occur after the evening meal. NES is a clinically important disorder due to its relationship to obesity, its association with other psychiatric disorders, and problems concerning sleep. However, NES often goes unrecognized by both health professionals and patients. The lack of knowledge regarding NES in clinical settings may lead to inadequate diagnoses and inappropriate treatment approaches. Therefore, the proper diagnosis of NES is the most important issue when identifying NES and providing treatment for this disorder. Clinical assessment tools such as the Night Eating Questionnaire may help health professionals working with populations vulnerable to NES. Although NES treatment studies are still in their infancy, antidepressant treatments and psychological therapies can be used for optimal management of patients with NES. Other treatment options such as melatonergic medications, light therapy, and the anticonvulsant topiramate also hold promise as future treatment options. The purpose of this review is to provide a summary of NES, including its diagnosis, comorbidities, and treatment approaches. Possible challenges addressing patients with NES and management options are also discussed. Keywords: night eating, obesity, psychiatric disorders, weight, depression

  9. GLOBE at Night: a Worldwide Citizen-Science Program to Increase Awareness of Light Pollution by Measuring Night Sky Brightness

    Science.gov (United States)

    Walker, C. E.; Pompea, S. M.

    2011-12-01

    canvassed the town, allowing for comparisons of light levels over time (hours, days, years) or searching for dark sky oases or light polluted areas. The increase to 2 campaigns in 2011 re-enforces these studies. The intent is to offer the program year-round for seasonal studies. The data can also be used to compare with datasets on wildlife, health, and energy consumption. Recently, NOAO and the Arizona Game and Fish Department have started a project with GLOBE at Night data and bat telemetry to examine a dark skies corridor in Tucson where the endangered bats fly. In addition, a 2nd new Web application (www.globeatnight.org/mapapp/) allows for mapping GLOBE at Night data points within a specified distance around a city or an area of choice. The resulting maps are bookmarkable and shareable. The presentation will highlight the education and outreach value of the program's resources and outcomes, lessons learned, successes and pitfalls in communicating awareness with the public and attracting young people to study science.

  10. Is blood pressure during the night more predictive of cardiovascular outcome than during the day?

    DEFF Research Database (Denmark)

    Li, Yan; Boggia, Jose; Thijs, Lutgarde

    2008-01-01

    The objective of this study was to investigate the prognostic significance of the ambulatory blood pressure (BP) during night and day and of the night-to-day BP ratio (NDR). We studied 7458 participants (mean age 56.8 years; 45.8% women) enrolled in the International Database on Ambulatory BP.......01). Daytime BP lost its prognostic significance for cardiovascular events in patients on antihypertensive treatment. Adjusted for the 24-h BP, NDR predicted mortality (P

  11. Nutritional status and eating habits of bus drivers during the day and night.

    Science.gov (United States)

    Balieiro, Laura Cristina Tibiletti; Rossato, Luana Thomazetto; Waterhouse, Jim; Paim, Samantha Lemos; Mota, Maria Carliana; Crispim, Cibele Aparecida

    2014-12-01

    The aim of this study was to compare anthropometry and food intake patterns in bus drivers working during the day and night. One hundred and fifty males (81 night workers and 69 day workers) participated in the study. Dietary intake was assessed using a validated semi-quantitative food frequency questionnaire. Measurements of height, weight, waist circumference (WC), systolic and diastolic blood pressure, blood glucose, and lipid profile were obtained. A significant difference between groups was observed for mean WC (98.5 ± 10.7 cm in day workers versus 103.2 ± 9.7 cm in night workers; p = 0.005). Night workers had higher prevalence of being overweight and obese (BMI ≥ 25 kg/m(2)) than day workers (78.2% day workers versus 90.2% night workers; p = 0.004) and increased WC (>94 cm) (72.4% day workers versus 86.4% night workers; p = 0.03). Significant differences were found for meat consumption (2.3 servings ±0.9 for night workers versus 2.0 servings ±0.7 day workers, p = 0.04) and fruit intake (0.9 servings ±0.4 for night workers versus 0.7 servings for day workers ±0.5; p = 0.006). Night workers had a lower intake of vegetables than recommended compared to day workers (100 versus 92.7%, respectively, p = 0.01) and higher intake of oil (40.7 versus 24.6%, p = 0.03). Multivariate logistic regression analysis indicated that night work was associated with being overweight (OR = 2.94, 95% IC: 1.14-7.66, p = 0.03) and abnormal values of WC (OR = 2.82, 95% IC: 1.20-6.69, p = 0.009) after adjusting for potential confounders. It is concluded that night workers had a higher prevalence and risk of being overweight/obese and increased WC compared with day workers. Night workers also presented a higher proportion of inappropriate intakes of food groups when compared to day workers, even though both groups were eating poor diets. These results demonstrate the need of lifestyle-intervention programs in these

  12. Controlled patterns of daytime light exposure improve circadian adjustment in simulated night work.

    Science.gov (United States)

    Dumont, Marie; Blais, Hélène; Roy, Joanie; Paquet, Jean

    2009-10-01

    Circadian misalignment between the endogenous circadian signal and the imposed rest-activity cycle is one of the main sources of sleep and health troubles in night shift workers. Timed bright light exposure during night work can reduce circadian misalignment in night workers, but this approach is limited by difficulties in incorporating bright light treatment into most workplaces. Controlled light and dark exposure during the daytime also has a significant impact on circadian phase and could be easier to implement in real-life situations. The authors previously described distinctive light exposure patterns in night nurses with and without circadian adaptation. In the present study, the main features of these patterns were used to design daytime light exposure profiles. Profiles were then tested in a laboratory simulation of night work to evaluate their efficacy in reducing circadian misalignment in night workers. The simulation included 2 day shifts followed by 4 consecutive night shifts (2400-0800 h). Healthy subjects (15 men and 23 women; 20-35 years old) were divided into 3 groups to test 3 daytime light exposure profiles designed to produce respectively a phase delay (delay group, n=12), a phase advance (advance group, n=13), or an unchanged circadian phase (stable group, n=13). In all 3 groups, light intensity was set at 50 lux during the nights of simulated night work. Salivary dim light melatonin onset (DLMO) showed a significant phase advance of 2.3 h (+/-1.3 h) in the advance group and a significant phase delay of 4.1 h (+/-1.3 h) in the delay group. The stable group showed a smaller but significant phase delay of 1.7 h (+/-1.6 h). Urinary 6-sulfatoxymelatonin (aMT6s) acrophases were highly correlated to salivary DLMOs. Urinary aMT6s acrophases were used to track daily phase shifts. They showed that phase shifts occurred rapidly and differed between the 3 groups by the 3rd night of simulated night work. These results show that significant phase shifts can

  13. [Possibilities and limits of sleep recovery for night-nursing workers].

    Science.gov (United States)

    de Medeiros, Soraya Maria; de Macêdo, Maria Lúcia Azevedo Ferreira; de Oliveira, Jonas Sâmi Albuquerque; Ribeiro, Laiane Medeiros

    2009-03-01

    The present study had the objective of investigating the possibilities/limits of sleep recovery in women workers with medium level in nursing that develop their activities in night shifts in a first-aid clinic at a public hospital in Natal, Rio Grande do Norte, Brazil. This was an analytic study, with a qualitative approach which used the technique of thematic oral history Fifteen women workers with medium level in nursing were interviewed. The following empirical categories were defined: night shift work and night sleep and night rest at work environment Physiological and psychological sufferings are evident on their speech as well as what the lack of sleep causes in health and personal life of these women workers, making the overload of work clear and also the sociocultural imperfections of feminine gender

  14. Arbuscular mycorrhizal symbiosis can mitigate the negative effects of night warming on physiological traits of Medicago truncatula L.

    Science.gov (United States)

    Hu, Yajun; Wu, Songlin; Sun, Yuqing; Li, Tao; Zhang, Xin; Chen, Caiyan; Lin, Ge; Chen, Baodong

    2015-02-01

    Elevated night temperature, one of the main climate warming scenarios, can have profound effects on plant growth and metabolism. However, little attention has been paid to the potential role of mycorrhizal associations in plant responses to night warming, although it is well known that symbiotic fungi can protect host plants against various environmental stresses. In the present study, physiological traits of Medicago truncatula L. in association with the arbuscular mycorrhizal (AM) fungus Rhizophagus irregularis were investigated under simulated night warming. A constant increase in night temperature of 1.53 °C significantly reduced plant shoot and root biomass, flower and seed number, leaf sugar concentration, and shoot Zn and root P concentrations. However, the AM association essentially mitigated these negative effects of night warming by improving plant growth, especially through increased root biomass, root to shoot ratio, and shoot Zn and root P concentrations. A significant interaction was observed between R. irregularis inoculation and night warming in influencing both root sucrose concentration and expression of sucrose synthase (SusS) genes, suggesting that AM symbiosis and increased night temperature jointly regulated plant sugar metabolism. Night warming stimulated AM fungal colonization but did not influence arbuscule abundance, symbiosis-related plant or fungal gene expression, or growth of extraradical mycelium, indicating little effect of night warming on the development or functioning of AM symbiosis. These findings highlight the importance of mycorrhizal symbiosis in assisting plant resilience to climate warming.

  15. The feast "STAR NIGHT 2009" in Shumen, Bulgaria

    Science.gov (United States)

    Kyurkchieva, Diana P.

    Information about the preparation and realization of the attractive program for the "Star Night" on September 25, 2009, in Shumen, is presented. Its goal is popularization of the European initiative "Research Night" in Bulgaria.

  16. Geneva motorway bypass closed for two nights

    CERN Document Server

    2006-01-01

    The carriageways heading towards France on the airport section of the motorway will be closed from 8.30 p.m. to 5.00 a.m. in the night of 1 to 2 October and those heading towards Lausanne during the same hours in the night of 2 to 3 October. This is to allow dry-surface road-marking and signage work to be performed. The work will be postponed in the event of bad weather, in which case the new date will be announced on Radio RSR and Radio Lac as well as on the telephone traffic news service 163. Diversions will be in operation. Thank you in advance for your understanding. For further information, tel. 163 or www.autoroute-aeroport.ch Civil Engineering Department, DCTI, State of Geneva

  17. Multi-channel automotive night vision system

    Science.gov (United States)

    Lu, Gang; Wang, Li-jun; Zhang, Yi

    2013-09-01

    A four-channel automotive night vision system is designed and developed .It is consist of the four active near-infrared cameras and an Mulit-channel image processing display unit,cameras were placed in the automobile front, left, right and rear of the system .The system uses near-infrared laser light source,the laser light beam is collimated, the light source contains a thermoelectric cooler (TEC),It can be synchronized with the camera focusing, also has an automatic light intensity adjustment, and thus can ensure the image quality. The principle of composition of the system is description in detail,on this basis, beam collimation,the LD driving and LD temperature control of near-infrared laser light source,four-channel image processing display are discussed.The system can be used in driver assistance, car BLIS, car parking assist system and car alarm system in day and night.

  18. CMS Virtual Visit - Researchers Night in Portugal

    CERN Multimedia

    Abreu, Pedro

    2016-01-01

    Researchers Night at Planetarium Calouste Gulbenkian - Ciência Viva Centre in Lisbon. Organised by researchers from LIP (Laboratório de Instrumentação e Física Experimental de Partículas) and including CMS Virtual Visit during which André David Tinoco Mendes and José Rasteiro da Silva, based at Cessy, France, "virtually" discussed science and technology behind the CMS detector with the audience in Lisbon.

  19. Shift work, light at night, and the risk of breast cancer.

    Science.gov (United States)

    Reed, Virginia A

    2011-01-01

    Studies of the effect of shift work have identified several negative health outcomes, most notably breast cancer. Disruption of circadian rhythm by exposure to light at night has been identified as the mechanism likely responsible for this outcome. This article recommends that health care institutions work with occupational health nurses to develop and implement hazard communication and policies concerning shift work, exposure to light at night, and increased risk for negative health outcomes, particularly breast cancer. 2011, SLACK Incorporated.

  20. Dry eye signs and symptoms in night-time workers

    OpenAIRE

    Ali Makateb; Hamed Torabifard

    2017-01-01

    Purpose: To determine the effect of night-time working on dry eye signs and symptoms. Methods: A total of 50 healthy subjects completed a dry eye questionnaire and underwent clinical examinations including basic Schirmer's test and tear breakup time (TBUT) test on two consecutive days, before and after the night shift (12-hrs night-shift). Results: All dry eye symptoms were aggravated significantly after the night shift (P 

  1. Is global warming mostly at night?

    International Nuclear Information System (INIS)

    Kukla, G.; Quayle, R.G.; Karl, T.

    1994-01-01

    The release of greenhouse gases is expected to lead to substantial future warming. The global mean temperature has indeed risen in recent decades. The causes of the observed warming, and its relation to the greenhouse gas buildup are, however, still debated. One important aspect of the observed temperature change relates to its asymmetry during the day and night. The day-night temperature difference over land in North America, most of Eurasia, Oceania, and portions of Africa and Australia shows a decrease since about 1950. The changes of the daily mean temperature in these areas are principally due to the rising night or early morning temperature, and are accompanied by increasing cloudiness. Their results support the notion that the increase of cloud cover, possibly due to industrial sulfur emissions, mitigates the greenhouse warming. The causes of the changing diurnal temperature range and of the increasing cloudiness will have to be clarified and the future SO 2 emissions reliably projected before any trustworthy prediction of future climates can be made. 37 refs., 7 figs., 2 tabs

  2. Mothers' night work and children's behavior problems.

    Science.gov (United States)

    Dunifon, Rachel; Kalil, Ariel; Crosby, Danielle A; Su, Jessica Houston

    2013-10-01

    Many mothers work in jobs with nonstandard schedules (i.e., schedules that involve work outside of the traditional 9-5, Monday through Friday schedule); this is particularly true for economically disadvantaged mothers. In the present article, we used longitudinal data from the Fragile Families and Child Wellbeing Survey (n = 2,367 mothers of children ages 3-5 years) to examine the associations between maternal nonstandard work and children's behavior problems, with a particular focus on mothers' night shift work. We employed 3 analytic strategies with various approaches to adjusting for observed and unobserved selection factors; these approaches provided an upper and lower bound on the true relationship between night shift work and children's behavior. Taken together, the results provide suggestive evidence for modest associations between exposure to maternal night shift work and higher levels of aggressive and anxious or depressed behavior in children compared with children whose mothers who are not working, those whose mothers work other types of nonstandard shifts, and, for aggressive behavior, those whose mothers work standard shifts.

  3. Night-shift work increases cold pain perception.

    Science.gov (United States)

    Pieh, Christoph; Jank, Robert; Waiß, Christoph; Pfeifer, Christian; Probst, Thomas; Lahmann, Claas; Oberndorfer, Stefan

    2018-05-01

    Although night-shift work (NSW) is associated with a higher risk for several physical and mental disorders, the impact of NSW on pain perception is still unclear. This study investigates the impact of NSW on cold pain perception considering the impact of mood and sleepiness. Quantitative sensory testing (QST) was performed in healthy night-shift workers. Cold pain threshold as well as tonic cold pain was assessed after one habitual night (T1), after a 12-hour NSW (T2) and after one recovery night (T3). Sleep quality was measured with the Pittsburgh Sleep Quality Index (PSQI) before T1, sleepiness with the Stanford Sleepiness Scale (SSS) and mood with a German short-version of the Profile of Mood States (ASTS) at T1, T2 and T3. Depending on the distribution of the data, ANOVAs or Friedman tests as well as t- or Wilcoxon tests were performed. Nineteen healthy shift-workers (13 females; 29.7 ± 7.5 years old; 8.1 ± 6.6 years in shift work, PSQI: 4.7 ± 2.2) were included. Tonic cold pain showed a significant difference between T1 (48.2 ± 27.5 mm), T2 (61.7 ± 26.6 mm; effect size: Cohen's d=.49; percent change 28%), and T3 (52.1 ± 28.7 mm) on a 0-100 mm Visual Analog Scale (p = 0.007). Cold pain threshold changed from 11.0 ± 7.9 °C (T1) to 14.5 ± 8.8 °C (T2) (p = 0.04), however, an ANOVA comparing T1, T2, and T3 was not significant (p = 0.095). Sleepiness (SSS) and mood (ASTS) changed significantly between T1, T2 and T3 (p-values night. Increases in cold pain perception due to NSW appear to be more strongly related to changes in mood as compared to changes in sleepiness. Copyright © 2018 Elsevier B.V. All rights reserved.

  4. Night and day variations of sleep in patients with disorders of consciousness.

    Science.gov (United States)

    Wislowska, Malgorzata; Del Giudice, Renata; Lechinger, Julia; Wielek, Tomasz; Heib, Dominik P J; Pitiot, Alain; Pichler, Gerald; Michitsch, Gabriele; Donis, Johann; Schabus, Manuel

    2017-03-21

    Brain injuries substantially change the entire landscape of oscillatory dynamics and render detection of typical sleep patterns difficult. Yet, sleep is characterized not only by specific EEG waveforms, but also by its circadian organization. In the present study we investigated whether brain dynamics of patients with disorders of consciousness systematically change between day and night. We recorded ~24 h EEG at the bedside of 18 patients diagnosed to be vigilant but unaware (Unresponsive Wakefulness Syndrome) and 17 patients revealing signs of fluctuating consciousness (Minimally Conscious State). The day-to-night changes in (i) spectral power, (ii) sleep-specific oscillatory patterns and (iii) signal complexity were analyzed and compared to 26 healthy control subjects. Surprisingly, the prevalence of sleep spindles and slow waves did not systematically vary between day and night in patients, whereas day-night changes in EEG power spectra and signal complexity were revealed in minimally conscious but not unaware patients.

  5. 5 CFR 532.505 - Night shift differentials.

    Science.gov (United States)

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Night shift differentials. 532.505... PREVAILING RATE SYSTEMS Premium Pay and Differentials § 532.505 Night shift differentials. (a) Employees shall be entitled to receive night shift differentials in accordance with section 5343 of title 5...

  6. Measuring and mapping the night sky brightness of Perth, Western Australia

    Science.gov (United States)

    Biggs, James D.; Fouché, Tiffany; Bilki, Frank; Zadnik, Marjan G.

    2012-04-01

    In order to study the light pollution produced in the city of Perth, Western Australia, we have used a hand-held sky brightness meter to measure the night sky brightness across the city. The data acquired facilitated the creation of a contour map of night sky brightness across the 2400 km2 area of the city - the first such map to be produced for a city. Importantly, this map was created using a methodology borrowed from the field of geophysics - the well proven and rigorous techniques of geostatistical analysis and modelling. A major finding of this study is the effect of land use on night sky brightness. By overlaying the night sky brightness map on to a suitably processed Landsat satellite image of Perth we found that locations near commercial and/or light industrial areas have a brighter night sky, whereas locations used for agriculture or having high vegetation coverage have a fainter night sky than surrounding areas. Urban areas have intermediate amounts of vegetation and are intermediate in brightness compared with the above-mentioned land uses. Regions with a higher density of major highways also appear to contribute to increased night sky brightness. When corrected for the effects of direct illumination from high buildings, we found that the night sky brightness in the central business district (CBD) is very close to that expected for a city of Perth's population from modelling work and observations obtained in earlier studies. Given that our night sky brightness measurements in Perth over 2009 and 2010 are commensurate with that measured in Canadian cities over 30 years earlier implies that the various lighting systems employed in Perth (and probably most other cities) have not been optimised to minimize light pollution over that time. We also found that night sky brightness diminished with distance with an exponent of approximately -0.25 ± 0.02 from 3.5 to 10 km from the Perth CBD, a region characterized by urban and commercial land use. For distances

  7. Shift Work, Chronotype, and Melatonin Patterns among Female Hospital Employees on Day and Night Shifts.

    Science.gov (United States)

    Leung, Michael; Tranmer, Joan; Hung, Eleanor; Korsiak, Jill; Day, Andrew G; Aronson, Kristan J

    2016-05-01

    Shift work-related carcinogenesis is hypothesized to be mediated by melatonin; however, few studies have considered the potential effect modification of this underlying pathway by chronotype or specific aspects of shift work such as the number of consecutive nights in a rotation. In this study, we examined melatonin patterns in relation to shift status, stratified by chronotype and number of consecutive night shifts, and cumulative lifetime exposure to shift work. Melatonin patterns of 261 female personnel (147 fixed-day and 114 on rotations, including nights) at Kingston General Hospital were analyzed using cosinor analysis. Urine samples were collected from all voids over a 48-hour specimen collection period for measurement of 6-sulfatoxymelatonin concentrations using the Buhlmann ELISA Kit. Chronotypes were assessed using mid-sleep time (MSF) derived from the Munich Chronotype Questionnaire (MCTQ). Sociodemographic, health, and occupational information were collected by questionnaire. Rotational shift nurses working nights had a lower mesor and an earlier time of peak melatonin production compared to day-only workers. More pronounced differences in mesor and acrophase were seen among later chronotypes, and shift workers working ≥3 consecutive nights. Among nurses, cumulative shift work was associated with a reduction in mesor. These results suggest that evening-types and/or shift workers working ≥3 consecutive nights are more susceptible to adverse light-at-night effects, whereas long-term shift work may also chronically reduce melatonin levels. Cumulative and current exposure to shift work, including nights, affects level and timing of melatonin production, which may be related to carcinogenesis and cancer risk. Cancer Epidemiol Biomarkers Prev; 25(5); 830-8. ©2016 AACR. ©2016 American Association for Cancer Research.

  8. Total and cause-specific mortality of U.S. nurses working rotating night shifts.

    Science.gov (United States)

    Gu, Fangyi; Han, Jiali; Laden, Francine; Pan, An; Caporaso, Neil E; Stampfer, Meir J; Kawachi, Ichiro; Rexrode, Kathryn M; Willett, Walter C; Hankinson, Susan E; Speizer, Frank E; Schernhammer, Eva S

    2015-03-01

    Rotating night shift work imposes circadian strain and is linked to the risk of several chronic diseases. To examine associations between rotating night shift work and all-cause; cardiovascular disease (CVD); and cancer mortality in a prospective cohort study of 74,862 registered U.S. nurses from the Nurses' Health Study. Lifetime rotating night shift work (defined as ≥3 nights/month) information was collected in 1988. During 22 years (1988-2010) of follow-up, 14,181 deaths were documented, including 3,062 CVD and 5,413 cancer deaths. Cox proportional hazards models estimated multivariable-adjusted hazard ratios (HRs) and 95% CIs. All-cause and CVD mortality were significantly increased among women with ≥5 years of rotating night shift work, compared to women who never worked night shifts. Specifically, for women with 6-14 and ≥15 years of rotating night shift work, the HRs were 1.11 (95% CI=1.06, 1.17) and 1.11 (95% CI=1.05, 1.18) for all-cause mortality and 1.19 (95% CI=1.07, 1.33) and 1.23 (95% CI=1.09, 1.38) for CVD mortality. There was no significant association between rotating night shift work and all-cancer mortality (HR≥15years=1.08, 95% CI=0.98, 1.19) or mortality of any individual cancer, with the exception of lung cancer (HR≥15years=1.25, 95% CI=1.04, 1.51). Women working rotating night shifts for ≥5 years have a modest increase in all-cause and CVD mortality; those working ≥15 years of rotating night shift work have a modest increase in lung cancer mortality. These results add to prior evidence of a potentially detrimental effect of rotating night shift work on health and longevity. Copyright © 2015 American Journal of Preventive Medicine. All rights reserved.

  9. Is transcriptomic regulation of berry development more important at night than during the day?

    Science.gov (United States)

    Rienth, Markus; Torregrosa, Laurent; Kelly, Mary T; Luchaire, Nathalie; Pellegrino, Anne; Grimplet, Jérôme; Romieu, Charles

    2014-01-01

    Diurnal changes in gene expression occur in all living organisms and have been studied on model plants such as Arabidopsis thaliana. To our knowledge the impact of the nycthemeral cycle on the genetic program of fleshly fruit development has been hitherto overlooked. In order to circumvent environmental changes throughout fruit development, young and ripening berries were sampled simultaneously on continuously flowering microvines acclimated to controlled circadian light and temperature changes. Gene expression profiles along fruit development were monitored during both day and night with whole genome microarrays (Nimblegen® vitis 12x), yielding a total number of 9273 developmentally modulated probesets. All day-detected transcripts were modulated at night, whereas 1843 genes were night-specific. Very similar developmental patterns of gene expression were observed using independent hierarchical clustering of day and night data, whereas functional categories of allocated transcripts varied according to time of day. Many transcripts within pathways, known to be up-regulated during ripening, in particular those linked to secondary metabolism exhibited a clearer developmental regulation at night than during the day. Functional enrichment analysis also indicated that diurnally modulated genes considerably varied during fruit development, with a shift from cellular organization and photosynthesis in green berries to secondary metabolism and stress-related genes in ripening berries. These results reveal critical changes in gene expression during night development that differ from daytime development, which have not been observed in other transcriptomic studies on fruit development thus far.

  10. Phosphide oxides RE2AuP2O (RE = La, Ce, Pr, Nd): synthesis, structure, chemical bonding, magnetism, and 31P and 139La solid state NMR.

    Science.gov (United States)

    Bartsch, Timo; Wiegand, Thomas; Ren, Jinjun; Eckert, Hellmut; Johrendt, Dirk; Niehaus, Oliver; Eul, Matthias; Pöttgen, Rainer

    2013-02-18

    Polycrystalline samples of the phosphide oxides RE(2)AuP(2)O (RE = La, Ce, Pr, Nd) were obtained from mixtures of the rare earth elements, binary rare earth oxides, gold powder, and red phosphorus in sealed silica tubes. Small single crystals were grown in NaCl/KCl fluxes. The samples were studied by powder X-ray diffraction, and the structures were refined from single crystal diffractometer data: La(2)AuP(2)O type, space group C2/m, a = 1515.2(4), b = 424.63(8), c = 999.2(2) pm, β = 130.90(2)°, wR2 = 0.0410, 1050 F(2) values for Ce(2)AuP(2)O, and a = 1503.6(4), b = 422.77(8), c = 993.0(2) pm, β = 130.88(2)°, wR2 = 0.0401, 1037 F(2) values for Pr(2)AuP(2)O, and a = 1501.87(5), b = 420.85(5), c = 990.3(3) pm, β = 131.12(1)°, wR2 = 0.0944, 1143 F(2) values for Nd(2)AuP(2)O with 38 variables per refinement. The structures are composed of [RE(2)O](4+) polycationic chains of cis-edge-sharing ORE(4/2) tetrahedra and polyanionic strands [AuP(2)](4-), which contain gold in almost trigonal-planar phosphorus coordination by P(3-) and P(2)(4-) entities. The isolated phosphorus atoms and the P(2) pairs in La(2)AuP(2)O could clearly be distinguished by (31)P solid state NMR spectroscopy and assigned on the basis of a double quantum NMR technique. Also, the two crystallographically inequivalent La sites could be distinguished by static (139)La NMR in conjunction with theoretical electric field gradient calculations. Temperature-dependent magnetic susceptibility measurements show diamagnetic behavior for La(2)AuP(2)O. Ce(2)AuP(2)O and Pr(2)AuP(2)O are Curie-Weiss paramagnets with experimental magnetic moments of 2.35 and 3.48 μ(B) per rare earth atom, respectively. Their solid state (31)P MAS NMR spectra are strongly influenced by paramagnetic interactions. Ce(2)AuP(2)O orders antiferromagnetically at 13.1(5) K and shows a metamagnetic transition at 11.5 kOe. Pr(2)AuP(2)O orders ferromagnetically at 7.0 K.

  11. A single night of partial sleep deprivation induces insulin resistance in multiple metabolic pathways in healthy subjects

    NARCIS (Netherlands)

    Donga, Esther; van Dijk, Marieke [Leiden Univ., LUMC; van Dijk, J. Gert; Biermasz, Nienke R.; Lammers, Gert-Jan; van Kralingen, Klaas W.; Corssmit, Eleonara P. M.; Romijn, Johannes A.

    2010-01-01

    Subsequent nights with partial sleep restriction result in impaired glucose tolerance, but the effects on insulin sensitivity have not been characterized. The aim of this study was to evaluate the effect of a single night of partial sleep restriction on parameters of insulin sensitivity. Nine

  12. Role of minor salivary glands in developing patient-rated xerostomia and sticky saliva during day and night

    International Nuclear Information System (INIS)

    Beetz, Ivo; Schilstra, Cornelis; Visink, Arjan; Schaaf, Arjen van der; Bijl, Henk P.; Laan, Bernard F.A.M. van der; Steenbakkers, Roel J.H.M.; Langendijk, Johannes A.

    2013-01-01

    Purpose: The purpose of this prospective study was to investigate the relationship between xerostomia during the day (XER day ) and night (XER night ) and sticky saliva during the day (STIC day ) and night (STIC night ) and dose distributions in different major and minor salivary glands among head and neck cancer (HNC) patients treated with primary radiotherapy (RT) or chemoradiation (CHRT). Methods and materials: The study population was composed of 201 consecutive HNC patients treated with intensity modulated radiotherapy (IMRT) or 3-dimensional conformal radiotherapy (3D-CRT). All patients were included in a standard follow up programme in which acute and late side effects and quality of life (QoL) were prospectively assessed, prior to, during and after treatment. The primary endpoints were XER day , XER night , STIC day , STIC night as assessed by the Groningen Radiotherapy Induced Xerostomia questionnaire (GRIX) six months after completion of treatment. Organs at risk (OARs) potentially involved in salivary function were delineated on planning-CT, including the parotid, submandibular and sublingual glands and the minor glands in the soft palate, buccal mucosa and lips. Patients with moderate-to-severe xerostomia or moderate-to-severe sticky saliva, respectively, at baseline were excluded. In order to determine which salivary glands were most important, a multivariate logistic regression analysis with an extended bootstrapping technique was used. Results: In total, 29% and 19% of the cases suffered from XER day and XER night , respectively. The multivariate analysis showed that baseline xerostomia and the mean parotid gland dose were the most important predictors for XER day and XER night . At 6 months after (CH)RT, 10% and 12% of the cases reported STIC day and STIC night respectively. We were not able to identify prognostic factors related to dose distributions with regard to STIC day . The mean submandibular gland dose was associated with STIC night

  13. The city at night (the case of Maribor, Slovenia

    Directory of Open Access Journals (Sweden)

    Vladimir Drozg

    2016-12-01

    Full Text Available This paper focuses on the city at night. The distinctive aspect of the discussed topic is the time dimension of spaces and areas – places that “live” at night. The night has economic, cultural, social and formal elements; and it is these elements that underpin how we see and come to know the city at night. A range of topics have been explored: places of retailing and consumption, workplaces, places of entertainment, places that embody the night image of the city and places of socially unacceptable, delinquent behaviour. In the empirical part, we examined the city of Maribor, Slovenia.

  14. The night sky brightness at McDonald Observatory

    Science.gov (United States)

    Kalinowski, J. K.; Roosen, R. G.; Brandt, J. C.

    1975-01-01

    Baseline observations of the night sky brightness in B and V are presented for McDonald Observatory. In agreement with earlier work by Elvey and Rudnick (1937) and Elvey (1943), significant night-to-night and same-night variations in sky brightness are found. Possible causes for these variations are discussed. The largest variation in sky brightness found during a single night is approximately a factor of two, a value which corresponds to a factor-of-four variation in airglow brightness. The data are used to comment on the accuracy of previously published surface photometry of M 81.

  15. The impact of sleep deprivation on surgeons' performance during night shifts.

    Science.gov (United States)

    Amirian, Ilda

    2014-09-01

    The median incidence of adverse events that may result in patient injury is a total of 9% of all in-hospital admissions. In order to reduce this high incidence initiatives are continuously worked on that can reduce the risk of patient harm during admission by strengthening hospital systems. However, the influence of physicians' shift work on the risk on adverse events in patients remains controversial. In the studies included in this PhD thesis we wished to examine the impact of sleep deprivation and circadian rhythm disturbances on surgeons' during night shifts. Further we wished to examine the impact sleep deprivation had on surgeons' performance as a measure of how patient safety would be affected. We found that sleep deprivation subjectively had an impact on the surgeons and that they were aware of the effect fatigue had on their work performance. As a result they applied different mechanisms to cope with fatigue. Attending surgeons felt that they had a better overview now, due to more experience and better skills, than when they were residents, despite the fatigue on night shifts. We monitored surgeons' performance during night shifts by laparoscopic simulation and cognitive tests in order to assess their performance; no deterioration was found when pre call values were compared to on call values. The surgeons were monitored prospectively for 4 days across a night shift in order to assess the circadian rhythm and sleep. We found that surgeons' circadian rhythm was affected by working night shifts and their sleep pattern altered, resembling that of shift workers on the post call day. We assessed the quality of admission in medical records as a measure of surgeons' performance, during day, evening and night hours and found no deterioration in the quality of night time medical records. However, consistent high errors were found in several categories. These findings should be followed up in the future with respect of clarifying mechanism and consequences for

  16. Night-shift work is associated with poorer glycaemic control in patients with type 2 diabetes.

    Science.gov (United States)

    Manodpitipong, Areesa; Saetung, Sunee; Nimitphong, Hataikarn; Siwasaranond, Nantaporn; Wongphan, Thanawat; Sornsiriwong, Chotima; Luckanajantachote, Pranee; Mangjit, Prasitchai; Keesukphan, Prasit; Crowley, Stephanie J; Hood, Megan M; Reutrakul, Sirimon

    2017-12-01

    The circadian system plays a role in regulating metabolism. Night-shift work, a form of circadian misalignment, is associated with increased type 2 diabetes risk. This study aimed to determine if night-shift workers with type 2 diabetes experience poorer glycaemic control than non-shift workers. Patients with type 2 diabetes (104 unemployed, 85 day workers and 60 night-shift workers) participated. Sleep duration, sleep quality, morningness-eveningness preference, depressive symptoms and dietary intake were assessed using standardized questionnaires. Haemoglobin A1c levels were measured. Night-shift workers had significantly higher haemoglobin A1c levels compared with others, while there were no differences between day workers and unemployed participants (median 7.86% versus 7.24% versus 7.09%, respectively). Additionally, night-shift workers were younger, had a higher body mass index, and consumed more daily calories than others. Among night-shift workers, there were no significant differences in haemoglobin A1c levels between those performing rotating versus non-rotating shifts (P = 0.856), or those with clockwise versus counterclockwise shift rotation (P = 0.833). After adjusting for age, body mass index, insulin use, sleep duration, morningness-eveningness preference and percentage of daily intake from carbohydrates, night-shift work, compared with day work, was associated with significantly higher haemoglobin A1c (B = 0.059, P = 0.044), while there were no differences between unemployed participants and day workers (B = 0.016, P = 0.572). In summary, night-shift work is associated with poorer glycaemic control in patients with type 2 diabetes. © The Authors. Journal of Sleep Research published by John Wiley & Sons Ltd on behalf of European Sleep Research Society.

  17. The location of late night bars and alcohol-related crashes in Houston, Texas.

    Science.gov (United States)

    Levine, Ned

    2017-10-01

    A study in the City of Houston, Texas, related the location of establishments primarily serving alcohol ("bars") after midnight to late night alcohol-related motor vehicle crashes. There were three data sets for 2007-09: 1) 764bars that were open after midnight; 2) 1660 alcohol-related crashes that occurred within the City of Houston between midnight and 6 am; and 3) 4689 modeling network road segments to which bars and alcohol-related crashes were assigned. Forty-five percent of the late night alcohol-related crashes were within a quarter mile of a late night bar. The bars were highly concentrated in 17 small bar clusters. Using the modeling network, Poisson-Gamma-CAR and Poisson-Lognormal-CAR spatial regression models showed a positive exponential relationship between late night alcohol-related crashes and the number of late nights bars and bar clusters, and a negative exponential relationship to distance to the nearest late night bar controlling for the type of road segment (freeway, principal arterial, minor arterial). A more general model dropped the bar cluster variable. Further, the Poisson-Gamma-CAR model appeared to produce a better representation than the Poisson-Lognormal-CAR model though the errors were different. The general Poisson-Gamma-CAR model showed that each late night bar increased the frequency of alcohol-related crashes on a segment by approximately 190%. For each mile closer a segment was to a late night bar, the likelihood increased by 42%. Copyright © 2017 Elsevier Ltd. All rights reserved.

  18. Energetics of stepwise disordering transformation in pyrochlores, RE2Ti2O7 (RE = Y, Gd and Dy)

    International Nuclear Information System (INIS)

    Hayun, Shmuel; Tran, Tien B.; Lian, Jie; Fuentes, Antonio F.; Navrotsky, Alexandra

    2012-01-01

    Graphical abstract: The transformation from disordered to more order state in the pyrochlore system go through multiple energetics steps; the cation sublattice rearrangement is control by the diffusion of the cations while the anion sublattice display an irreversible transformation from a disordered to a higher-ordered state via diffusionless transformation. - Abstract: The capacity to incorporate actinide cations makes pyrochlore titanates first-choice phases in titanate-based waste form ceramics. Despite broad interest in the pyrochlore order–disorder transformation due to the cumulative effects of 238 U, 235 U and 232 Th radioactive decay and their daughter products, only limited thermodynamic data, mainly based on simulations of ion-beam irradiation experiments, have been reported. In this work, for the first time, heavily disordered pyrochlores, RE 2 Ti 2 O 7 (RE = Y, Gd and Dy), from mechanical milling of their constituent oxides, were thermochemically investigated. Two types of thermal events were identified using high-temperature differential scanning calorimetry and correlated to the structural disorder in the cation and anion sublattices. Moreover, the excess formation energy measured by oxide melt solution calorimetry shows that the smaller the ionic radius of the RE, the easier it is to remove damage domains.

  19. Rapid resetting of human peripheral clocks by phototherapy during simulated night shift work.

    Science.gov (United States)

    Cuesta, Marc; Boudreau, Philippe; Cermakian, Nicolas; Boivin, Diane B

    2017-11-24

    A majority of night shift workers have their circadian rhythms misaligned to their atypical schedule. While bright light exposure at night is known to reset the human central circadian clock, the behavior of peripheral clocks under conditions of shift work is more elusive. The aim of the present study was to quantify the resetting effects of bright light exposure on both central (plasma cortisol and melatonin) and peripheral clocks markers (clock gene expression in peripheral blood mononuclear cells, PBMCs) in subjects living at night. Eighteen healthy subjects were enrolled to either a control (dim light) or a bright light group. Blood was sampled at baseline and on the 4 th day of simulated night shift. In response to a night-oriented schedule, the phase of PER1 and BMAL1 rhythms in PBMCs was delayed by ~2.5-3 h (P shift was observed for the other clock genes and the central markers. Three cycles of 8-h bright light induced significant phase delays (P night-oriented schedule and a rapid resetting effect of nocturnal bright light exposure on peripheral clocks.

  20. Working the night shift: a necessary time for training or a risk to health and safety?

    Science.gov (United States)

    Morrison, I; Flower, D; Hurley, J; McFadyen, R J

    2013-01-01

    The European Working Time Directive (EWTD) limits excessive night shifts and restricts the working week to no more than 48 hours. The underlying rationale is to minimise the health risks to all workers. Here we debate the impact of night rotas for doctors-in-training on patient safety and medical education; when the EWTD was agreed these topics may not have been considered, either systematically or objectively. The impacts of diurnal rhythms on human functions affect all night workers, but the nature of rostered medical and surgical work has little precedent in other industries or even in the contracts of other healthcare staff. For example, rostered night duties need to be distinguished from permanent night shift work. On-call medical night work from training doctors is generally required for short periods and usually involves fewer patients. It is an important time in training, where clinical responsibility and decision-making can be matured in a supervised setting. To comply with the EWTD most hospitals have adopted rota patterns that aim to cover the clinical needs, while ensuring no doctor works for more than 48 hours in an average working week. To monitor this process longterm studies are necessary to evaluate effects on a doctor's health and on patient care generally. The EWTD has also led to a loss of continuity of patient care; does this really matter?

  1. Diet quality and sleep quality among day and night shift nurses.

    Science.gov (United States)

    Beebe, Deborah; Chang, Jen Jen; Kress, Kathleen; Mattfeldt-Beman, Mildred

    2017-10-01

    To determine whether night shift workers have a poorer diet quality and sleep quality when compared with day shift nurses. There is a dearth of research investigating the association between diet quality and sleep quality of day and night shift nurses. Data on nurses (n = 103) working either a day or night shift from two Midwestern hospitals were obtained from August 2015 to February 2016. The instruments used were the Diet History Questionnaire and the Pittsburg Sleep Quality Index. Independent samples t-tests were used to examine differences in diet and sleep quality by work shift schedule. There were no statistically significant differences between nurses working day or night shift and sleep quality (P = 0.0684), as well as diet quality (P = 0.6499). There was a significant difference between both body mass index (P = 0.0014) and exercise (P = 0.0020) with regard to diet quality. Body mass index and sleep quality were also significantly associated (P = 0.0032). Our study found no differences between day and night shift with regard to sleep and diet quality among nurses. Deliberate health initiatives and wellness programmes specifically targeting nurses are needed to increase knowledge about maintaining a healthy lifestyle while working as a nurse, whether it is day or night shift. © 2017 John Wiley & Sons Ltd.

  2. Night-shift work and breast cancer risk in a cohort of Chinese women.

    Science.gov (United States)

    Pronk, Anjoeka; Ji, Bu-Tian; Shu, Xiao-Ou; Xue, Shouzheng; Yang, Gong; Li, Hong-Lan; Rothman, Nathaniel; Gao, Yu-Tang; Zheng, Wei; Chow, Wong-Ho

    2010-05-01

    Shift work involving disruption of circadian rhythms has been classified as a probable cause of human cancer by the International Agency for Research on Cancer, based on limited epidemiologic evidence and abundant experimental evidence. The authors investigated this association in a population-based prospective cohort study of Chinese women. At baseline (1996-2000), information on lifetime occupational history was obtained from 73,049 women. Lifetime night-shift exposure indices were created using a job exposure matrix. During 2002-2004, self-reported data on frequency and duration of night-shift work were collected. Hazard ratios and 95% confidence intervals, adjusted for major breast cancer risk factors, were calculated. During follow-up through 2007, 717 incident cases of breast cancer were diagnosed. Breast cancer risk was not associated with ever working the night shift on the basis of the job exposure matrix (adjusted hazard ratio = 1.0, 95% confidence interval: 0.9, 1.2) or self-reported history of night-shift work (adjusted hazard ratio = 0.9, 95% confidence interval: 0.7, 1.1). Risk was also not associated with frequency, duration, or cumulative amount of night-shift work. There were no indications of effect modification. The lack of an association between night-shift work and breast cancer adds to the inconsistent epidemiologic evidence. It may be premature to consider shift work a cause of cancer.

  3. Infant sleep and night feeding patterns during later infancy: association with breastfeeding frequency, daytime complementary food intake, and infant weight.

    Science.gov (United States)

    Brown, Amy; Harries, Victoria

    2015-06-01

    Infant sleep is a common concern for new parents. Although many expect a newborn infant to wake frequently, encouraging a baby to sleep through the night by a few months of age is seen as both a developmental aim and a parenting success. Many new mothers believe that their infants' diet is related to their sleep; formula milk or increased levels of solid food are often given in an attempt to promote sleep. However, the impact of these in later infancy is not understood. In the current study 715 mothers with an infant 6-12 months of age reported their infants' typical night wakings and night feeds alongside any breastfeeding and frequency of solid meals. Of infants in this age range, 78.6% still regularly woke at least once a night, with 61.4% receiving one or more milk feeds. Both night wakings and night feeds decreased with age. No difference in night wakings or night feeds was found between mothers who were currently breastfeeding or formula feeding. However, infants who received more milk or solid feeds during the day were less likely to feed at night but not less likely to wake. The findings have important implications for health professionals who support new mothers with infant sleep and diet in the first year. Increasing infant calories during the day may therefore reduce the likelihood of night feeding but will not reduce the need for parents to attend to the infant in the night. Breastfeeding has no impact on infant sleep in the second 6 months postpartum.

  4. The stargazer's guide to the night sky

    CERN Document Server

    Lisle, Jason, Dr

    2012-01-01

    Explore the night sky, identify stars, constellations, and even planets. Stargaze with a telescope, binoculars, or even your naked eye. Allow Dr. Jason Lisle, a research scientist with a masters and PhD in astrophysics, to guide you in examining the beauty of God's Creation with 150 full color star-charts. Learn the best ways and optimal times to observe planets and stars with easy to use illustrations. Create or expand the hobby of stargazing; an outdoor, educational hobby to enjoy with friends or family.

  5. Domiciliary night nursing service: luxury or necessity?

    OpenAIRE

    Martin, M H; Ishino, M

    1981-01-01

    The nursing records of the 242 patients who used the domiciliary night nursing care service in Newham Health District showed that three distinct groups of patients were nursed during 1979 at a cost of 8.8 pounds a day. Forty-three elderly chronically sick and five disabled patients aged under 50 received care for more than 28 days, 63 patients had terminal cancer, and 131 needed short-term care or observation. Data were also collected from a one-day survey of patients receiving care. This dom...

  6. Time-dependent effects of dim light at night on re-entrainment and masking of hamster activity rhythms.

    Science.gov (United States)

    Frank, David W; Evans, Jennifer A; Gorman, Michael R

    2010-04-01

    Bright light has been established as the most ubiquitous environmental cue that entrains circadian timing systems under natural conditions. Light equivalent in intensity to moonlight (dim nighttime illumination accelerated re-entrainment of hamster activity rhythms to 4-hour phase advances and delays of an otherwise standard laboratory photocycle. The purpose of this study was to determine if a sensitive period existed in the night during which dim illumination had a robust influence on speed of re-entrainment. Male Siberian hamsters were either exposed to dim light throughout the night, for half of the night, or not at all. Compared to dark nights, dim illumination throughout the entire night decreased by 29% the time for the midpoint of the active phase to re-entrain to a 4-hour phase advance and by 26% for a 4-hour delay. Acceleration of advances and delays were also achieved with 5 hours of dim light per night, but effects depended on whether dim light was present in the first half, second half, or first and last quarters of the night. Both during phase shifting and steady-state entrainment, partially lit nights also produced strong positive and negative masking effects, as well as entrainment aftereffects in constant darkness. Thus, even in the presence of a strong zeitgeber, light that might be encountered under a natural nighttime sky potently modulates the circadian timing system of hamsters.

  7. Being a researcher for one night

    CERN Multimedia

    Roberto Cantoni

    2010-01-01

    On 24 September from 5 p.m. to 1 a.m., European Researchers Night will give some 100 young students from local schools the opportunity to sit side by side with scientists and operators in the LHC control rooms. At the same time, a live webcast will connect CERN with various institutes around Europe participating in the Being a European Scientist Today (BEST) project. You are all invited to take part!   Copyright Frascati Scienza The European Researchers Night is an EU initiated and funded initiative, which aims at highlighting the appeal of being a researcher. Meeting scientists in a ‘fun’ and festive context gives the public, especially the young, the opportunity to get to know the job better and be inspired to pursue a career in research. “CERN scientists already took part in last year’s event, but only through a web connection with Frascati in Italy”, explains Paola Catapano, a member of the Communication group and organiser of the activities t...

  8. Night/day ratios of ambulatory blood pressure among healthy adolescents: roles of race, socioeconomic status, and psychosocial factors.

    Science.gov (United States)

    Burford, Tanisha I; Low, Carissa A; Matthews, Karen A

    2013-10-01

    Elevated nighttime blood pressure (BP) predicts hypertension and its complications in adulthood. This study aimed to assess the independent effects of race and family income on night/day BP among adolescents and to examine whether negative emotions, low positive resources, and unpleasant interactions during the day are also related. Healthy African American and Caucasian high school students (N = 239) wore an ambulatory BP monitor for 48 h, recorded quality of ongoing interpersonal interactions, and completed questionnaires. African Americans and those with lower family income had higher night/day BP ratios. African Americans reporting greater negative emotions, lower positive resources, and more unpleasant interactions had higher night/day BP ratios. Racial differences in night BP emerge by adolescence, independent of family income. African Americans, especially those high in negative emotions and low in positive resources, may be at higher relative risk for hypertension later in life in part due to elevated night BP.

  9. [Night workers' exposure to harshness factors in France: Lessons learned from the 2010 SUMER Survey].

    Science.gov (United States)

    Havet, N; Huguet, M; Tonietta, J

    2017-11-01

    Despite the fact that French laws state that night work should be exceptional, the number of night workers has sharply increased in the past 20 years. At the same time, empirical and epidemiological studies indicate that night work has negative effects on workers' health. This is why the 2010 French pension act considered night work to be a drudgery. The aim of this study is to investigate whether night workers are more subject to other factors defined as contributing to the drudgery of work than are day workers. This article focuses on exposure to physical constraints (manual manipulation of heavy loads, awkward posture, exposure to mechanical vibrations) and aggressive physical environment (carcinogenic, mutagenic and reprotoxic chemicals [CMR], extreme temperature and noise). Our study used the 2010 Medical Monitoring Survey of Occupational Risks [Surveillance médicale des expositions aux risques professionnels, (SUMER)] that was conducted among a sample of around 50,000 employees representative of 21.7 million French employees. We used logistic regressions to explore the potential influence of night work on the probabilities of exposure to at least one CMR, noise, thermal nuisance and physical constraints. Even though descriptive statistics suggest that night workers are more exposed to drudgery of work than day workers, our multivariate logistic models indicate that the exposure is not always positively correlated with the number of nights worked. Moreover, the exposure differs according to gender and socio-occupational category. Our findings suggest that night workers are more exposed to several factors defined as contributing to the drudgery of work than are day workers. Thus, they seem to face multiple disadvantages in the labor market. Preventive measures in favor of night workers should be targeted at job content as much as work organization. Copyright © 2017 Elsevier Masson SAS. All rights reserved.

  10. Night awakening in infancy: Developmental stability and longitudinal associations with psychomotor development.

    Science.gov (United States)

    Mäkelä, Tiina E; Peltola, Mikko J; Nieminen, Pirkko; Paavonen, E Juulia; Saarenpää-Heikkilä, Outi; Paunio, Tiina; Kylliäinen, Anneli

    2018-03-29

    Fragmented sleep is common in infancy. Although night awakening is known to decrease with age, in some infants night awakening is more persistent and continues into older ages. However, the influence of fragmented sleep on development is poorly known. In the present study, the longitudinal relationship between fragmented sleep and psychomotor development (Bayley Scales of Infant and Toddler Development [Bayley-III]; Bayley, 2009) was investigated in infants with (≥3 night awakenings, n = 81) and without fragmented sleep (≤1 night awakening, n = 70) within the CHILD-SLEEP birth cohort at 8 and 24 months of age. Differences in parent-reported (Brief Infant Sleep Questionnaire [BISQ]) sleep parameters were studied at 8, 18, and 24 months of age. Group differences in night awakening were stable across all assessment points. Infants with fragmented sleep slept less in total than infants without fragmented sleep and they did not compensate their nocturnal sleep during daytime. Additionally, infants with fragmented sleep spent more time awake at night than infants without fragmented sleep. However, psychomotor development did not differ between infants with and without fragmented sleep at 8 or 24 months of age. Our findings indicate that early onset fragmented sleep did not have a negative effect on psychomotor development within the first 2 years despite the differences in sleep length among infants with and without fragmented sleep. In the future, more specific domains of cognitive development and various factors affecting sleep fragmentation should be taken into account when studying the developmental effects of night awakening in infancy. (PsycINFO Database Record (c) 2018 APA, all rights reserved).

  11. Healthy Diet And Reduction Of Chronic Disease Risks Of Night Shift Workers.

    Science.gov (United States)

    Ferri, Giovanni M; Cavone, Domenica; Intranuovo, Graziana; Macinagrossa, Linda

    2017-07-20

    The large increase in epidemiological studies on night shift work is due to the important effects of night shift work on workers' health and psychophysical wellbeing. The short-term effects-insomnia, difficulties in managing work and private life, lower work performance, and more work and extra-work accidents-are easily studied. However, there are several long-term effects that are difficult to study because of the need for detailed exposure assessment and the long latency periods of these diseases. The aim was to collect epidemiologic evidence of diseases in night shift workers, describing their biological pathways and a set of dietary guidelines. This is a review on diet and health effects in night shift workers. Significant increases in the rate ratios and hazard ratios of different diseases were associated with modified eating behaviours and poor eating habits among night shift workers. Night shift work is a risk factor for disruption of the circadian rhythms and for some genetic deregulation because it produces the inversion of the sleep/wake cycle and modifies the alternation between activity and rest. A healthy diet and improved dietary practices, together with other factors, can reduce shift workers' chronic disease risk. The literature showed the importance of eating behaviour in order to prevent diseases in these workers; therefore, educational programmes are necessary to encourage several important lifestyle changes. The target of our future research will be the role of food components in some dietetic habits for the prevention of disease in night shift workers. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.

  12. Late night activity regarding stroke codes: LuNAR strokes.

    Science.gov (United States)

    Tafreshi, Gilda; Raman, Rema; Ernstrom, Karin; Rapp, Karen; Meyer, Brett C

    2012-08-01

    There is diurnal variation for cardiac arrest and sudden cardiac death. Stroke may show a similar pattern. We assessed whether strokes presenting during a particular time of day or night are more likely of vascular etiology. To compare emergency department stroke codes arriving between 22:00 and 8:00 hours (LuNAR strokes) vs. others (n-LuNAR strokes). The purpose was to determine if late night strokes are more likely to be true strokes or warrant acute tissue plasminogen activator evaluations. We reviewed prospectively collected cases in the University of California, San Diego Stroke Team database gathered over a four-year period. Stroke codes at six emergency departments were classified based on arrival time. Those arriving between 22:00 and 8:00 hours were classified as LuNAR stroke codes, the remainder were classified as 'n-LuNAR'. Patients were further classified as intracerebral hemorrhage, acute ischemic stroke not receiving tissue plasminogen activator, acute ischemic stroke receiving tissue plasminogen activator, transient ischemic attack, and nonstroke. Categorical outcomes were compared using Fisher's Exact test. Continuous outcomes were compared using Wilcoxon's Rank-sum test. A total of 1607 patients were included in our study, of which, 299 (19%) were LuNAR code strokes. The overall median NIHSS was five, higher in the LuNAR group (n-LuNAR 5, LuNAR 7; P=0·022). There was no overall differences in patient diagnoses between LuNAR and n-LuNAR strokes (P=0·169) or diagnosis of acute ischemic stroke receiving tissue plasminogen activator (n-LuNAR 191 (14·6%), LuNAR 42 (14·0%); P=0·86). Mean arrival to computed tomography scan time was longer during LuNAR hours (n-LuNAR 54·9±76·3 min, LuNAR 62·5±87·7 min; P=0·027). There was no significant difference in 90-day mortality (n-LuNAR 15·0%, LuNAR 13·2%; P=0·45). Our stroke center experience showed no difference in diagnosis of acute ischemic stroke between day and night stroke codes. This

  13. Lessons learnt from Volcanoes' Night I-II-III - a Marie Curie Researchers' Night project series dedicated to geosciences

    Science.gov (United States)

    Cseko, Adrienn; Bodo, Balazs; Ortega Rodriguez, Ariadna

    2017-04-01

    European Researchers' Nights (ERNs) are a pan-European series of events funded by the European Commission, organised on the last Friday of every September since 2005. ERNs mobilise scientific, academic and research organisations with the aim of giving the public the opportunity to meet researchers in an informal setting. The overall objective of ERNs is to achieve better awareness among the general public concerning the importance of science in everyday life and to combat stereotypes about researchers. The longer-term strategic objective of ERNs is to encourage young people to embark on a scientific career. Volcanoes' Night I-II-III has been an ERN project series funded by the EC FP7 and H2020 programmes between 2012-2015 (EC contract No. 316558, 610050, 633310, www.nochedevolcanes.es). The concept of Volcanoes' Night was created by researchers from the Canary Islands, Spain, where both the researchers and the public live in the close vicinity of volcanoes. The objective of the project was to use volcanoes as a background against which the role of geoscientists could be explained to the public. The scope of Volcanoes' Night was exclusively dedicated to geoscience, and in this respect it stands out among all other ERN projects, which are always more general in scope. During its four years of EC funding, the geographical coverage of Volcanoes' Night expanded substantially from a single location in 2012 (Fuencaliente de La Palma, Spain) to a dozen locations in 2015, mobilising multiple scientific organisations, researchers, and public authorities for engagement with the public. The last EC-funded project, Volcanoes' Night III, which was organised in 2014 and 2015, engaged approximately 21,000 visitors through its outreach activities, which included experiments, science cafés, volcano movies, My Day presentations, excursions, science workshops and more. The impact of the project was carefully assessed via surveys and social studies during its lifetime, and an Impact

  14. Night shift work at specific age ranges and chronic disease risk factors.

    Science.gov (United States)

    Ramin, Cody; Devore, Elizabeth E; Wang, Weike; Pierre-Paul, Jeffrey; Wegrzyn, Lani R; Schernhammer, Eva S

    2015-02-01

    We examined the association of night shift work history and age when night shift work was performed with cancer and cardiovascular disease risk factors among 54 724 women in the Nurses' Health Study (NHS) II. We calculated age-adjusted and socioeconomic status-adjusted means and percentages for cancer and cardiovascular risk factors in 2009 across categories of night shift work history. We used multivariable-adjusted logistic regression to estimate odds ratios (ORs) and 95% CIs for key risk factors among 54 724 participants (72% ever shift workers). We further examined these associations by age (20-25, 26-35, 36-45 and 46+ years) at which shift work was performed. Ever night shift workers had increased odds of obesity (body mass index ≥30 kg/m(2); OR=1.37, 95% CI 1.31 to 1.43); higher caffeine intake (≥131 mg/day; OR=1.16, 95% CI 1.12 to 1.22) and total calorie intake (≥1715 kcal/day; OR=1.09, 95% CI 1.04 to 1.13); current smoking (OR=1.30, 95% CI 1.19 to 1.42); and shorter sleep durations (≤7 h of sleep/day; OR=1.19, 95% CI 1.15 to 1.24) compared to never night shift workers. These estimates varied depending on age at which night work was performed, with a suggestion that night shift work before age 25 was associated with fewer risk factors compared to night shift work at older ages. Our results indicate that night shift work may contribute to an adverse chronic disease risk profile, and that risk factors may vary depending on the age at which night shift work was performed. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  15. Symptoms and Cognitive Functions in Adolescents in Relation to Mobile Phone Use during Night

    Science.gov (United States)

    Schoeni, Anna; Roser, Katharina; Röösli, Martin

    2015-01-01

    Many adolescents tend to leave their mobile phones turned on during night, accepting that they may be awakened by an incoming text message or call. Using self-reported and objective operator recorded mobile phone use data, we thus aimed to analyze how being awakened during night by mobile phone affects adolescents’ perceived health and cognitive functions. In this cross-sectional study, 439 adolescents completed questionnaires about their mobile phone use during night, health related quality of life and possible confounding factors. Standardized computerized cognitive tests were performed to assess memory and concentration capacity. Objective operator recorded mobile phone use data was further collected for 233 study participants. Data were analyzed by multivariable regression models adjusted for relevant confounders including amount of mobile phone use. For adolescents reporting to be awakened by a mobile phone during night at least once a month the odds ratio for daytime tiredness and rapid exhaustibility were 1.86 (95% CI: 1.02–3.39) and 2.28 (95% CI: 0.97–5.34), respectively. Similar results were found when analyzing objective operator recorded mobile phone use data (tiredness: 1.63, 95% CI: 0.94–2.82 and rapid exhaustibility: 2.32, 95% CI: 1.01–5.36). The cognitive tests on memory and concentration capacity were not related to mobile phone use during night. Overall, being awakened during night by mobile phone was associated with an increase in health symptom reports such as tiredness, rapid exhaustibility, headache and physical ill-being, but not with memory and concentration capacity. Prevention strategies should focus on helping adolescents set limits for their accessibility by mobile phone, especially during night. PMID:26222312

  16. Symptoms and Cognitive Functions in Adolescents in Relation to Mobile Phone Use during Night.

    Science.gov (United States)

    Schoeni, Anna; Roser, Katharina; Röösli, Martin

    2015-01-01

    Many adolescents tend to leave their mobile phones turned on during night, accepting that they may be awakened by an incoming text message or call. Using self-reported and objective operator recorded mobile phone use data, we thus aimed to analyze how being awakened during night by mobile phone affects adolescents' perceived health and cognitive functions. In this cross-sectional study, 439 adolescents completed questionnaires about their mobile phone use during night, health related quality of life and possible confounding factors. Standardized computerized cognitive tests were performed to assess memory and concentration capacity. Objective operator recorded mobile phone use data was further collected for 233 study participants. Data were analyzed by multivariable regression models adjusted for relevant confounders including amount of mobile phone use. For adolescents reporting to be awakened by a mobile phone during night at least once a month the odds ratio for daytime tiredness and rapid exhaustibility were 1.86 (95% CI: 1.02-3.39) and 2.28 (95% CI: 0.97-5.34), respectively. Similar results were found when analyzing objective operator recorded mobile phone use data (tiredness: 1.63, 95% CI: 0.94-2.82 and rapid exhaustibility: 2.32, 95% CI: 1.01-5.36). The cognitive tests on memory and concentration capacity were not related to mobile phone use during night. Overall, being awakened during night by mobile phone was associated with an increase in health symptom reports such as tiredness, rapid exhaustibility, headache and physical ill-being, but not with memory and concentration capacity. Prevention strategies should focus on helping adolescents set limits for their accessibility by mobile phone, especially during night.

  17. Day and night shift schedules are associated with lower sleep quality in Evening-types.

    Science.gov (United States)

    Martin, Jeanne Sophie; Laberge, Luc; Sasseville, Alexandre; Bérubé, Marilie; Alain, Samuel; Houle, Jérôme; Hébert, Marc

    2015-06-01

    Eveningness has been suggested as a facilitating factor in adaptation to shift work, with several studies reporting evening chronotypes (E-types) as better sleepers when on night shifts. Conversely, eveningness has been associated with more sleep complaints during day shifts. However, sleep during day shifts has received limited attention in previous studies assessing chronotypes in shift workers. Environmental light exposure has also been reported to differ between chronotypes in day workers. Activity is also known to provide temporal input to the circadian clock. Therefore, the aim of this study was to compare objective sleep, light exposure and activity levels between chronotypes, both during the night and day shifts. Thirty-nine patrol police patrol officers working on a fast rotating shift schedule (mean age ± SD: 28.9 ± 3.2 yrs; 28 males) participated in this study. All subjects completed the Morningness-Eveningness Questionnaire (MEQ). Sleep and activity were monitored with actigraphy (Actiwatch-L; Mini-Mitter/Respironics, Bend, OR) for four consecutive night shifts and four consecutive day shifts (night work schedule: 00:00 h-07:00 h; day work schedule: 07:00 h-15:00 h). Sleep and activity parameters were calculated with Actiware software. MEQ scores ranged from 26 to 56; no subject was categorized as Morning-type. E-types (n = 13) showed significantly lower sleep efficiency, longer snooze time and spent more time awake after sleep onset than Intermediate-types (I-types, n = 26) for both the night and day shifts. E-types also exhibited shorter and more numerous sleep bouts. Furthermore, when napping was taken into account, E-types had shorter total sleep duration than I-types during the day shifts. E-types were more active during the first hours of their night shift when compared to I-types. Also, all participants spent more time active and had higher amount of activity per minute during day shifts when compared to night shifts. No

  18. Arsia Mons by Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 22 June 2004 This pair of images shows part of Arsia Mons. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude -19.6, Longitude 241.9 East (118.1 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project

  19. Albor Tholus by Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 21 June 2004 This pair of images shows part of Albor Tholus. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude 17.6, Longitude 150.3 East (209.7 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project

  20. Noctus Labyrinthus by Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 25 June 2004 This pair of images shows part of Noctus Labyrinthus. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude -9.6, Longitude 264.5 East (95.5 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with

  1. Crater Ejecta by Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 24 June 2004 This pair of images shows a crater and its ejecta. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude -9, Longitude 164.2 East (195.8 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project

  2. Meridiani Crater in Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 14 June 2004 This pair of images shows crater ejecta in the Terra Meridiani region. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude -1.6, Longitude 4.1 East (355.9 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in

  3. Ius Chasma by Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 18 June 2004 This pair of images shows part of Ius Chasma. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude -1, Longitude 276 East (84 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at

  4. Gusev Crater by Day and Night

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 23 June 2004 This pair of images shows part of Gusev Crater. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude -14.5, Longitude 175.5 East (184.5 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project

  5. Day And Night In Terra Meridiani

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] Released 11 June 2004 This pair of images shows part of the Terra Meridiani region. Day/Night Infrared Pairs The image pairs presented focus on a single surface feature as seen in both the daytime and nighttime by the infrared THEMIS camera. The nighttime image (right) has been rotated 180 degrees to place north at the top. Infrared image interpretation Daytime: Infrared images taken during the daytime exhibit both the morphological and thermophysical properties of the surface of Mars. Morphologic details are visible due to the effect of sun-facing slopes receiving more energy than antisun-facing slopes. This creates a warm (bright) slope and cool (dark) slope appearance that mimics the light and shadows of a visible wavelength image. Thermophysical properties are seen in that dust heats up more quickly than rocks. Thus dusty areas are bright and rocky areas are dark. Nighttime: Infrared images taken during the nighttime exhibit only the thermophysical properties of the surface of Mars. The effect of sun-facing versus non-sun-facing energy dissipates quickly at night. Thermophysical effects dominate as different surfaces cool at different rates through the nighttime hours. Rocks cool slowly, and are therefore relatively bright at night (remember that rocks are dark during the day). Dust and other fine grained materials cool very quickly and are dark in nighttime infrared images. Image information: IR instrument. Latitude 1.3, Longitude 0.5 East (359.5 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with

  6. Airborne Use of Night Vision Systems

    Science.gov (United States)

    Mepham, S.

    1990-04-01

    Mission Management Department of the Royal Aerospace Establishment has won a Queen's Award for Technology, jointly with GEC Sensors, in recognition of innovation and success in the development and application of night vision technology for fixed wing aircraft. This work has been carried out to satisfy the operational needs of the Royal Air Force. These are seen to be: - Operations in the NATO Central Region - To have a night as well as a day capability - To carry out low level, high speed penetration - To attack battlefield targets, especially groups of tanks - To meet these objectives at minimum cost The most effective way to penetrate enemy defences is at low level and survivability would be greatly enhanced with a first pass attack. It is therefore most important that not only must the pilot be able to fly at low level to the target but also he must be able to detect it in sufficient time to complete a successful attack. An analysis of the average operating conditions in Central Europe during winter clearly shows that high speed low level attacks can only be made for about 20 per cent of the 24 hours. Extending this into good night conditions raises the figure to 60 per cent. Whilst it is true that this is for winter conditions and in summer the situation is better, the overall advantage to be gained is clear. If our aircraft do not have this capability the potential for the enemy to advance his troops and armour without hinderance for considerable periods is all too obvious. There are several solutions to providing such a capability. The one chosen for Tornado GR1 is to use Terrain Following Radar (TFR). This system is a complete 24 hour capability. However it has two main disadvantages, it is an active system which means it can be jammed or homed into, and is useful in attacking pre-planned targets. Second it is an expensive system which precludes fitting to other than a small number of aircraft.

  7. Effect of working consecutive night shifts on sleep time, prior wakefulness, perceived levels of fatigue and performance on a psychometric test in emergency registrars.

    Science.gov (United States)

    Haire, Julia Christine Lydia; Ferguson, Sally Anne; Tilleard, James D; Negus, Paul; Dorrian, Jillian; Thomas, Matthew Jw

    2012-06-01

    To evaluate the effect of working consecutive night shifts on sleep time, prior wakefulness, perceived levels of fatigue and psychomotor performance in a group of Australian emergency registrars. A prospective observational study with a repeated within-subjects component was conducted. Sleep time was determined using sleep diaries and activity monitors. Subjective fatigue levels and reciprocal reaction times were evaluated before and after day and night shifts. A total of 11 registrars participated in the study with 120 shifts analysed. Sleep time was found to be similar during consecutive night and day shifts. The mean number of hours spent awake before the end of a night shift was 14.33. Subjective fatigue scores were worst at the end of a night shift. There was no difference in reciprocal reaction time between the end of night shift and the start of day shift. Registrars sleep a similar amount of time surrounding night and day shifts. Despite reporting the highest levels of fatigue at the end of a night shift, there is no significant difference in reaction times at the end of night shift compared with the beginning of day shift. This correlates with the finding that at the end of night shift the registrars have been awake for less than 16 h, which is the point at which psychomotor performance is expected to decline. © 2012 The Authors. EMA © 2012 Australasian College for Emergency Medicine and Australasian Society for Emergency Medicine.

  8. Effect of Day and Night Desflurane Anaesthesia on Melatonin Levels in Rats.

    Science.gov (United States)

    Özer, Figen Datlı; Öçmen, Elvan; Akan, Pınar; Erdost, Hale Aksu; Korkut, Sezen; Gökmen, Ali Necati

    2016-08-01

    The aim of this study is to investigate the effect of day and night administration of desflurane anaesthesia on melatonin levels in rats. Twenty-four 15-day-old rats were included in the study and were divided into four groups. The rats were anaesthetised between 19:00-01:00 (night group) and 07:00-13:00 (day group) with 5.7% desflurane concentration in 6 L min -1 100% oxygen. 6 L min -1 oxygen was administered to the control groups. At the end of 6 h of anaesthesia, blood samples were taken, and rats were sacrificed. Blood samples were centrifuged and melatonin levels from plasma samples were measured with radioimmunoassay. There was a statistically significant difference between the groups (p=0.007). Between group day control and group night control there was a statistically significant difference (p=0.042). Further, there was a significant difference between group day control and night desfluran as well (p=0.024). We could not find any difference between other groups. This study showed that 6 hours of 5.7% desflurane anaesthesia during day and night hours did not significantly change melatonin levels.

  9. Aromatherapy alleviates endothelial dysfunction of medical staff after night-shift work: preliminary observations.

    Science.gov (United States)

    Shimada, Kenei; Fukuda, Shota; Maeda, Kumiko; Kawasaki, Toshihiro; Kono, Yasushi; Jissho, Satoshi; Taguchi, Haruyuki; Yoshiyama, Minoru; Yoshikawa, Junichi

    2011-02-01

    Night-shift work causes mental stress and lifestyle changes, and is recognized as a risk of cardiovascular diseases associated with impaired endothelial function. Aromatherapy is becoming popular as a complementary therapy that is beneficial for mental relaxation. The purpose of this study was to investigate the effect of aromatherapy on the endothelial function of medical staff after night-shift work. This study consisted of 19 healthy medical personnel (19 men, mean age 32 ± 7 years), including 11 physicians and 8 technicians. Aromatherapy was performed for 30 min by inhalation of the essential oil of lavender. Flow-mediated dilation (FMD) of the brachial artery was measured three times in each subject: on a regular workday, and after night-shift work before and immediately after aromatherapy. A control study was performed to assess the effect of a 30-min rest without aromatherapy. The mean value of sleep time during night-shift work was 3.3 ± 1.3 h. FMD after night-shift work was lower than on a regular workday (10.4 ± 1.8 vs. 12.5 ± 1.7%, Pnight-shift work impaired endothelial function in medical staff, an effect that was alleviated by short-term aromatherapy.

  10. The observer's year 366 nights in the universe

    CERN Document Server

    Moore, Patrick

    2005-01-01

    This is a night by night account of the stars. For every night of the year Sir Patrick Moore gives the reader details of interesting objects that can be seen from earth. It is a book for people with a wide interest in astronomy, those who may not have specialised in a specific area of astronomy and wish to expand their knowledge in all areas. This second edition is updated for astronomical events through until 2010.

  11. Childhood night terrors and sleepwalking: diagnosis and treatment

    OpenAIRE

    Sachin Ratan Gedam; Pradeep S. Patil; Imran Ali Shivji

    2017-01-01

    Night terrors and sleepwalking are arousal disorders that occur during the first third of night. Combined existence of sleep disorders are rare phenomenon and found to be associated with behavioural and emotional problems. It becomes difficult to diagnose among sleep disorders and epilepsy is an important differential diagnosis. Management with combined approach of pharmacotherapy and psychological counselling is safe and effective. Here, we present a case of night terrors and sleepwalking to...

  12. Increased and Mistimed Sex Hormone Production in Night Shift Workers

    OpenAIRE

    Papantoniou, K; Pozo, OJ; Espinosa, A; Marcos, J; Castano-Vinyals, G; Basagana, X; Juanola Pages, E; Mirabent, J; Martin, J; Such Faro, P; Gasco Aparici, A; Middleton, B; Skene, DJ; Kogevinas, M

    2015-01-01

    BACKGROUND: Night shift work has been associated with an increased risk for breast and prostate cancer. The effect of circadian disruption on sex steroid production is a possible underlying mechanism, underinvestigated in humans. We have assessed daily rhythms of sex hormones and melatonin in night and day shift workers of both sexes. METHODS: We recruited 75 night and 42 day workers, ages 22 to 64 years, in different working settings. Participants collected urine samples from all voids over ...

  13. Diagnostic Performance of Ultrasonography for Pediatric Appendicitis: A Night and Day Difference?

    Science.gov (United States)

    Mangona, Kate Louise M; Guillerman, R Paul; Mangona, Victor S; Carpenter, Jennifer; Zhang, Wei; Lopez, Monica; Orth, Robert C

    2017-12-01

    For imaging pediatric appendicitis, ultrasonography (US) is preferred because of its lack of ionizing radiation, but is limited by operator dependence. This study investigates the US diagnostic performance during night shifts covered by radiology trainees compared to day shifts covered by attending radiologists. Appy-Scores (1 = completely visualized normal appendix; 2 = partially visualized normal appendix; 3 = nonvisualized appendix with no inflammatory changes in the expected region of the appendix; 4 = equivocal; 5a = nonperforated appendicitis; 5b = perforated appendicitis) from 2935 US examinations (2161:774, day-to-night) from July 2013 to 2014 were correlated with the intraoperative diagnoses and the clinical follow-up. The diagnostic performance of trainees and attendings was compared with Fisher exact test. Interobserver agreement was measured by Cohen kappa coefficient. Appendicitis prevalence was 25.3% (day) and 22.5% (night). Sensitivity, specificity, accuracy, negative predictive value, and positive predictive vale were 94.0%, 93.7%, 93.8%, 97.9%, and 83.4% during the day and 92.0%, 91.2%, 91.3%, 97.5%, and 75.2% at night. Specificity (P = .048) and positive predictive value (P = .011) differed, with more false positives at night (7%) than during the day (4.7%). Trainee and attending agreement was high (k = 0.995), with Appy-Scores of 1, 4, and 5a most frequently discordant. US has a high diagnostic performance and interobserver agreement for pediatric appendicitis when interpreted by radiology trainees during night shifts or attending radiologists during day shifts. However, lower specificity and positive predictive value at night warrants a thorough trainee education to avoid false-positive examinations. Published by Elsevier Inc.

  14. Effects of age and illumination on night driving: a road test.

    Science.gov (United States)

    Owens, D Alfred; Wood, Joanne M; Owens, Justin M

    2007-12-01

    This study investigated the effects of drivers' age and low light on speed, lane keeping, and visual recognition of typical roadway stimuli. Poor visibility, which is exacerbated by age-related changes in vision, is a leading contributor to fatal nighttime crashes. There is little evidence, however, concerning the extent to which drivers recognize and compensate for their visual limitations at night. Young, middle-aged, and elder participants drove on a closed road course in day and night conditions at a "comfortable" speed without speedometer information. During night tests, headlight intensity was varied over a range of 1.5 log units using neutral density filters. Average speed and recognition of road signs decreased significantly as functions of increased age and reduced illumination. Recognition of pedestrians at night was significantly enhanced by retroreflective markings of limb joints as compared with markings of the torso, and this benefit was greater for middle-aged and elder drivers. Lane keeping showed nonlinear effects of lighting, which interacted with task conditions and drivers' lateral bias, indicating that older drivers drove more cautiously in low light. Consistent with the hypothesis that drivers misjudge their visual abilities at night, participants of all age groups failed to compensate fully for diminished visual recognition abilities in low light, although older drivers behaved more cautiously than the younger groups. These findings highlight the importance of educating all road users about the limitations of night vision and provide new evidence that retroreflective markings of the limbs can be of great benefit to pedestrians' safety at night.

  15. Melatonin treatment of pediatric residents for adaptation to night shift work.

    Science.gov (United States)

    Cavallo, Anita; Ris, M Douglas; Succop, Paul; Jaskiewicz, Julie

    2005-01-01

    Night float rotations are used in residency training programs to reduce residents' sleep deprivation. Night shift work, however, is accompanied by deleterious effects on sleep, mood, and attention. To test whether melatonin reduces the deleterious effects of night shift work on sleep, mood, and attention in pediatric residents during night float rotation. Double-blind, randomized, placebo-controlled crossover. Participants took melatonin (3 mg) or a placebo before bedtime in the morning after night shift; completed a sleep diary and an adverse-effects questionnaire daily; and completed the Profile of Mood States and the Conners Continuous Performance Test 3 times in each study week to test mood and attention, respectively. A university-affiliated, tertiary-care pediatric hospital. Healthy second-year pediatric residents working 2 night float rotations. Standardized measures of sleep, mood, and attention. Twenty-eight residents completed both treatments; 17 completed 1 treatment (10 placebo, 7 melatonin). There was not a statistically significant difference in measures of sleep, mood, and 5 of 6 measures of attention during melatonin and placebo treatment. One measure of attention, the number of omission errors, was significantly lower on melatonin (3.0 +/- 9.6) than on placebo (4.5 +/- 17.5) (z = -2.12, P = .03). The isolated finding of improvement of 1 single measure of attention in a test situation during melatonin treatment was not sufficiently robust to demonstrate a beneficial effect of melatonin in the dose used. Other strategies need to be considered to help residents in adaptation to night shift work.

  16. Researchers' Night: science at the shops

    CERN Multimedia

    Corinne Pralavorio

    2015-01-01

    On 25 September, as part of European Researchers’ Night, CERN and POPScience joined forces to welcome the public at the Balexert shopping centre in Geneva. The Bulletin presents its gallery of photographs from the exciting and educational event.   Science through comic strips, games, cinema and television: POPScience approaches scientific questions through popular culture, with great success! Around 500 children attended the sessions for schools at Balexert's multiplex cinema, and 600 spectators flocked to the public screenings.  Using the big screen, scientists, directors and authors were on hand to disentangle truth from untruths and science from science fiction. The guests, some of whom appeared in person and others via video link, included Jorge Cham, author of PhD Comics and the spin-off film; David Saltzberg, physicist at CMS and scientific consultant for the television series The Big Bang Theory; Kip Thorne, scientific consultant for the film Interstellar; Lawrence ...

  17. STARS4ALL Night Sky Brightness Photometer

    Directory of Open Access Journals (Sweden)

    Jaime Zamorano

    2017-06-01

    Full Text Available We present the main features of TESS-W, the first version of a series of inexpensive but reliable photometers that will be used to measure night sky brightness. The bandpass is extended to the red with respect of that of the Sky Quality Meter (SQM. TESS-W connects to a router via WIFI and it sends automatically the brightness values to a data repository using Internet of Things protocols. The device includes an infrared sensor to estimate the cloud coverage. It is designed for fixed stations to monitor the evolution of the sky brightness. The photometer could also be used in local mode connected to a computer or tablet to gather data from a moving vehicle. The photometer is being developed within STARS4ALL project, a collective awareness platform for promoting dark skies in Europe, funded by the EU. We intend to extend the existing professional networks to a citizen-based network of photometers. 

  18. Self-reported health and sleep complaints among nursing personnel working under 12 h night and day shifts.

    Science.gov (United States)

    Portela, Luciana F; Rotenberg, Lúcia; Waissmann, William

    2004-01-01

    This cross-sectional exploratory study involved health care workers of various skill types and levels. We tested the hypothesis that the prevalence of diseases, sleep complaints, and insufficient time for nonprofessional activities (family, leisure, and rest) are higher among night than day workers. Data collection was carried out in two public hospitals using questionnaires and other forms. Night work was explored as a risk factor, considering a night worker as one who had at least one night job on the occasion of the research. Data were assessed by a univariate analysis. The association between work schedule and the dependent variables--health conditions, sleep complaints, and insufficient time for nonprofessional activities--was evaluated through the estimation of the prevalence ratio, with a confidence interval of 95%. Two hundred and fifty-eight female nursing personnel participated; 41.5% were moonlighters, and only 20 worked a shift of less than 12h in length. Reports of migraine and need of medical care the 2 weeks before the survey were more prevalent among day than night workers (PR=0.71; CI=0.55-0.92 and PR=0.71; CI=0.52-0.95, respectively). Migraine headaches occurred less frequently among night than day workers as confirmed by comparing the reports of the night workers and day workers whose work history was always day shifts (PR = 0.74; CI = 0.57-0.96). Reports of mild emotional disorders (mild depression, tension, anxiety, or insomnia) were less frequent among night (PR=0.76; CI=0.59-0.98) and ex-night workers (PR=0.68; CI=0.50-0.91) than day workers who never had worked a night job. The healthy worker effect does not seem to explain the results of the comparisons between day and night workers. The possible role of exposure by day workers to some risk factors, such as stress, was suggested as an explanation for these results. No significant difference was observed between night and day workers as to sleep complaints, a result that may have been

  19. Night lights and regional income inequality in Africa

    DEFF Research Database (Denmark)

    Mveyange, Anthony Francis

    Estimating regional income inequality in Africa has been challenging due to the lack of reliable and consistent sub-national income data. I employ night lights data to circumvent this limitation. I find significant and positive associations between regional inequality visible through night lights...... and income in Africa. Thus, in the absence of income data, we can construct regional inequality proxies using night lights data. Further investigation on the night lights-based regional inequality trends reveals two main findings: first, increasing regional inequality trends between 1992 and 2003; and second......, declining regional inequality trends between 2004 and 2012....

  20. Sign of the day-night asymmetry for solar neutrinos

    International Nuclear Information System (INIS)

    Chiang, Cheng-Wei; Wolfenstein, Lincoln

    2001-01-01

    A qualitative understanding of the day-night asymmetry for solar neutrinos is provided. The greater night flux in ν e is seen to be a consequence of the fact that the matter effect in the Sun and that in the Earth have the same sign. It is shown in the adiabatic approximation for the Sun and constant density for the Earth that, for all values of the mixing angle θ V between 0 and π/2, the night flux of neutrinos is greater than the day flux. Only for small values of θ V where the adiabatic approximation badly fails does the sign of the day-night asymmetry reverse

  1. Dim Light at Night Increases Body Mass of Female Mice

    OpenAIRE

    Aubrecht, Taryn G.; Jenkins, Richelle; Nelson, Randy J.

    2014-01-01

    During the past century the prevalence of light at night has increased in parallel with obesity rates. Dim light at night (dLAN) increases body mass in male mice. However, the effects of light at night on female body mass remain unspecified. Thus, female mice were exposed to a standard light/dark (LD; 16h light at ~150 lux/8h dark at ~0 lux) cycle or to light/dim light at night (dLAN; 16h light at ~150 lux/8h dim light at ~5 lux) cycles for six weeks. Females exposed to dLAN increased the rat...

  2. Four new dysprosium and neodymium octamolybdate hydrates: assembly of RE2(Mo8O27) sheets and topotactic transformations.

    Science.gov (United States)

    Kuang, Xiaojun; Evans, Ivana R

    2010-07-05

    Four new Dy and Nd hydrated octamolybdate materials have been prepared: [Dy(2)(H(2)O)(12)](Mo(8)O(27)) x 8 H(2)O, [Dy(2)(H(2)O)(6)](Mo(8)O(27)), [Nd(2)(H(2)O)(12)](Mo(8)O(27)) x 6 H(2)O, and [Nd(2)(H(2)O)(6)]Mo(8)O(27) x 3 H(2)O. They adopt one known and three new structure types, which we have determined ab initio from powder X-ray diffraction data. The four compounds contain the same basic structural building block, in the form of RE(2)Mo(8)O(27) (RE = Dy, Nd) chains, which are arranged differently for the two rare earths in the fully hydrated precursor materials. [Dy(2)(H(2)O)(12)](Mo(8)O(27)) x 8 H(2)O comprises isolated Dy(2)Mo(8)O(27) chains assembled in a zigzag manner along the a axis with interspersed crystallized water molecules, which differs from the parallel arrangements of isolated Nd(2)Mo(8)O(27) chains in [Nd(2)(H(2)O)(12)](Mo(8)O(27)) x 6 H(2)O. Partial dehydration of the two precursors leads to new phases [Dy(2)(H(2)O)(6)](Mo(8)O(27)) and [Nd(2)(H(2)O)(6)]Mo(8)O(27) x 3 H(2)O, respectively, prior to complete dehydration, which leads to initially amorphous and eventually crystalline rare-earth molybdenum mixed metal oxides. Both initial transformations occur topotactically. Partial dehydration of the Dy phase condenses the assembly of the Dy(2)Mo(8)O(27) chains principally along the a axis, leading to a 3-dimensional (3D) framework, with each Dy bridging two (Mo(8)O(27))(6-) sheets in the product. The partial dehydration of the Nd precursor condenses the assembly of Nd(2)Mo(8)O(27) chains along the [110] axis, leading to a 3D framework where each Nd bridges three (Mo(8)O(27))(6-) units. Both new dysprosium octamolybdates adopt noncentrosymmetric polar structures in space group P2(1) and are second harmonic generation (SHG) active.

  3. Relationship between napping during night shift work and household obligations of female nursing personnel.

    Science.gov (United States)

    Silva-Costa, Aline; Fischer, Frida Marina; Griep, Rosane Harter; Rotenberg, Lúcia

    2013-01-01

    Night shift employment involves displacing sleep to the daytime. For female workers, the opportunity for daytime sleep is influenced by routine housework demands, which aggravates sleep deprivation. Allowing naps to be taken during the night shift of work is a frequent practice at some hospitals and can help reduce the effects of sleep deprivation. We hypothesize that an association between domestic work and the length of naps during night work exists for nursing professionals. To test this hypothesis, two cross-sectional studies were conducted in two different hospitals. In Study 1, female workers answered questionnaires regarding sleeping habits, professional work, and housework demands. In Study 2, data regarding napping during shifts was obtained by actigraphy, a noninvasive method of monitoring the human sleep-wake cycle. The demand for the performance of housework was measured by (i) domestic work hours (total time spent performing domestic work per week), and (ii) domestic workload, which considers the degree of sharing domestic tasks and the number of people living at home. The populations from the two studies were subdivided into groups, based on the duration of napping at work. Data on naps were analyzed according to domestic demands, using the Mann-Whitney and Chi-squared tests. Among the two study populations (Studies 1 and 2), those in Study 2 were older, had shorter professional weekly work hours, worked more night shifts, and dedicated more time to housework. significant associations were only found in Study 2, where greater time napping at work was associated with both greater time spent doing housework and greater domestic workload. The known benefits of napping during night shifts seem to be especially relevant for female workers who are more sleep-deprived from working more night shifts and who have higher demands for housework.

  4. Effects of a night-team system on resident sleep and work hours.

    Science.gov (United States)

    Chua, Kao-Ping; Gordon, Mary Beth; Sectish, Theodore; Landrigan, Christopher P

    2011-12-01

    In 2009, Children's Hospital Boston implemented a night-team system on general pediatric wards to reduce extended work shifts. Residents worked 5 consecutive nights for 1 week and worked day shifts for the remainder of the rotation. Of note, resident staffing at night decreased under this system. The objective of this study was to assess the effects of this system on resident sleep and work hours. We conducted a prospective cohort study in which residents on the night-team system logged their sleep and work hours on work days. These data were compared with similar data collected in 2004, when there was a traditional call system. In 2004 and 2009, mean shift length was 15.22 ± 6.86 and 12.92 ± 5.70 hours, respectively (P = .161). Daily work hours were 10.49 ± 6.85 and 8.79 ± 6.42 hours, respectively (P = .08). Nightly sleep time decreased from 6.72 ± 2.60 to 4.77 ± 2.46 hours (P team system was unexpectedly associated with decreased sleep hours. As residency programs create work schedules that are compliant with the 2011 Accreditation Council for Graduate Medical Education duty-hour standards, resident sleep should be monitored carefully.

  5. The diagnostic value of late-night salivary cortisol for diagnosis of subclinical Cushing's syndrome.

    Science.gov (United States)

    Kuzu, Idris; Zuhur, Sayid Shafi; Demir, Nazan; Aktas, Gokce; Yener Ozturk, Feyza; Altuntas, Yuksel

    2016-01-01

    Late-night salivary cortisol is a frequently used and easily implemented diagnostically valuable test for the diagnosis of overt Cushing's syndrome. The use of late-night salivary cortisol in the diagnosis of subclinical Cushing's syndrome is somewhat controversial. In this study, we aimed to determine the diagnostic value of late-night salivary cortisol in diagnosing subclinical Cushing's syndrome and compare it with 24-hour urinary free cortisol levels (UFC). The study consisted of 33 cases of subclinical Cushing's syndrome, 59 cases of non-functioning adrenal adenoma, and 41 control subjects. Late-night salivary cortisol and UFC were measured in all the cases. The diagnosis of subclinical Cushing's syndrome was based on combined results of 1 mg dexamethasone suppression test > 1.8 μg/dL and ACTH Cushing's syndrome were significantly higher than in subjects with non-functioning adrenal adenoma and the control group (p Cushing's syndrome were determined as 82% and 60%, respectively. Using a cut-off value of 137 μg/day, the sensitivity and specificity of UFC was determined as 18% and 90%, respectively. Because the sensitivity of late-night salivary cortisol for the diagnosis of subclinical Cushing's syndrome is limited, using it as the sole screening test for subclinical Cushing's syndrome may lead to false negative results. However, using it as an adjunct test to other tests may be beneficial in the diagnosis of subclinical Cushing's syndrome. (Endokrynol Pol 2016; 67 (5): 487-492).

  6. Neuroendocrine recovery after 2-week 12-h day and night shifts

    DEFF Research Database (Denmark)

    Merkus, Suzanne L; Holte, Kari Anne; Huysmans, Maaike A

    2015-01-01

    PURPOSE: The study aimed to investigate the course and duration of neuroendocrine recovery after 2-week 12-h day and night shift working periods and to study whether there were differences in recovery between the shift groups. METHODS: Twenty-nine male offshore employees working 2-week 12-h shift...... tours participated in the study; 15 participated after a day shift tour and 14 after a night shift tour. Salivary cortisol was assessed at awakening, 30 min after awakening, and before bedtime on the 1st, 4th, 7th, and 11th day of the free period, with a reference day prior to the offshore tour....... Differences were tested using generalised estimating equations analysis. RESULTS: Compared to the reference day, night shift workers had a significantly flatter cortisol profile on the 1st day off, significantly lower cortisol concentrations at 30 min after awakening on day 4 and at awakening on day 7...

  7. Phototherapy and orange-tinted goggles for night-shift adaptation of police officers on patrol.

    Science.gov (United States)

    Boivin, Diane B; Boudreau, Philippe; Tremblay, Geneviève M

    2012-06-01

    The aim of the present combined field and laboratory study was to assess circadian entrainment in two groups of police officers working seven consecutive 8/8.5-h night shifts as part of a rotating schedule. Eight full-time police officers on patrol (mean age ± SD: 29.8 ± 6.5 yrs) were provided an intervention consisting of intermittent exposure to wide-spectrum bright light at night, orange-tinted goggles at sunrise, and maintenance of a regular sleep/darkness episode in the day. Orange-tinted goggles have been shown to block the melatonin-suppressing effect of light significantly more than neutral gray density goggles. Nine control group police officers (mean age ± SD: 30.3 ± 4.1 yrs) working the same schedule were enrolled. Police officers were studied before, after (in the laboratory), and during (ambulatory) a series of seven consecutive nights. Urine samples were collected at wake time and bedtime throughout the week of night work and during laboratory visits (1 × /3 h) preceding and following the work week to measure urinary 6-sulfatoxymelatonin (UaMT6s) excretion rate. Subjective alertness was assessed at the start, middle, and end of night shifts. A 10-min psychomotor vigilance task was performed at the start and end of each shift. Both laboratory visits consisted of two 8-h sleep episodes based on the prior schedule. Saliva samples were collected 2 × /h during waking episodes to assay their melatonin content. Subjective alertness (3 × /h) and performance (1 × /2 h) were assessed during wake periods in the laboratory. A mixed linear model was used to analyze the progression of UaMt6s excreted during daytime sleep episodes at home, as well as psychomotor performance and subjective alertness during night shifts. Two-way analysis of variance (ANOVA) (factors: laboratory visit and group) were used to compare peak salivary melatonin and UaMT6s excretion rate in the laboratory. In both groups of police officers, the excretion rate of UaMT6s at home was

  8. Light at Night Markup Language (LANML): XML Technology for Light at Night Monitoring Data

    Science.gov (United States)

    Craine, B. L.; Craine, E. R.; Craine, E. M.; Crawford, D. L.

    2013-05-01

    Light at Night Markup Language (LANML) is a standard, based upon XML, useful in acquiring, validating, transporting, archiving and analyzing multi-dimensional light at night (LAN) datasets of any size. The LANML standard can accommodate a variety of measurement scenarios including single spot measures, static time-series, web based monitoring networks, mobile measurements, and airborne measurements. LANML is human-readable, machine-readable, and does not require a dedicated parser. In addition LANML is flexible; ensuring future extensions of the format will remain backward compatible with analysis software. The XML technology is at the heart of communicating over the internet and can be equally useful at the desktop level, making this standard particularly attractive for web based applications, educational outreach and efficient collaboration between research groups.

  9. A combined field and laboratory design for assessing the impact of night shift work on police officer operational performance.

    Science.gov (United States)

    Waggoner, Lauren B; Grant, Devon A; Van Dongen, Hans P A; Belenky, Gregory; Vila, Bryan

    2012-11-01

    This study assessed the utility of a combined field and laboratory research design for measuring the impact of consecutive night shift work on the sleepiness, vigilance, and driving performance of police patrol officers. For police patrol officers working their normal night shift duty cycles, simulated driving performance and psychomotor vigilance were measured in a laboratory on two separate occasions: in the morning after the last of five consecutive 10.7-h night shifts, and at the same time in the morning after three consecutive days off duty. Order of participation in conditions was randomized among subjects. Subjects experienced manipulation of sleep schedules due to working night shifts in a real operational environment, but performance testing was conducted under controlled laboratory conditions. N = 29 active-duty police patrol officers (27 male, 2 female; age 37.1 ± 6.3 years) working night shift schedules participated in this study. Simulated driving performance, psychomotor vigilance, and subjective sleepiness were significantly degraded following 5 consecutive night shifts as compared to 3 consecutive days off duty, indicating that active-duty police officers are susceptible to performance degradation as a consequence of working nights. This combined field and laboratory research design succeeded in bridging the gap between the realism of the operational environment and the control of laboratory performance testing, demonstrating that this is a useful approach for addressing the relationship between shift work induced fatigue and critical operational task performance.

  10. Objective and quantitative analysis of daytime sleepiness in physicians after night duties.

    Science.gov (United States)

    Wilhelm, Barbara J; Widmann, Anja; Durst, Wilhelm; Heine, Christian; Otto, Gerhard

    2009-06-01

    Work place studies often have the disadvantage of lacking objective data less prone to subject bias. The aim of this study was to contribute objective data to the discussion about safety aspects of night shifts in physicians. For this purpose we applied the Pupillographic Sleepiness Test (PST). The PST allows recording and analyses of pupillary sleepiness-related oscillations in darkness for 11 min in the sitting subject. The parameter of evaluation is the Pupillary Unrest Index (PUI; mm/min). For statistical analysis the natural logarithm of this parameter is used (lnPUI). Thirty-four physicians were examined by the PST and subjective scales during the first half of the day. Data taken during a day work period (D) were compared to those taken directly after night duty (N) by a Wilcoxon signed rank test. Night duty caused a mean sleep reduction of 3 h (Difference N-D: median 3 h, minimum 0 h, maximum 7 h, p home.

  11. Night shift work and incidence of diabetes in the Danish Nurse Cohort

    DEFF Research Database (Denmark)

    Hansen, Anne B.; Stayner, Leslie; Hansen, Johnni

    2016-01-01

    OBJECTIVES: Night shift work has been associated with poor sleep, weight gain, metabolic syndrome, which are recognised risk factor for diabetes. However, only a few studies have examined the effect of shift work on diabetes risk. Here, we study the association between shift work and incidence...... for incidence of diabetes until 2013. Nurses reported whether they worked night, evening, rotating or day shifts. We analysed the association between working time and diabetes incidence using a Cox proportional hazards model adjusted for diabetes risk factors, separately with and without adjustment for body...... mass index (BMI) which might be an intermediate variable. RESULTS: Of 19 873 nurses who worked and were diabetes-free at recruitment, 837 (4.4%) developed diabetes during 15 years of follow-up. The majority of nurses (62.4%) worked day shifts, 21.8% rotating shift, 10.1% evening and 5.5% night shifts...

  12. Cold-induced bradycardia in man during sleep in Arctic winter nights

    Science.gov (United States)

    Buguet, A. G. C.

    1987-03-01

    Two young male Caucasians volunteered for a study on the effects of cold exposure during night sleep in winter in the Arctic. The 14-day experiment was divided in three consecutive periods, baseline (2 nights), cold exposure (10 night) and recovery (2 nights). Both baseline and recovery data were obtained in neutral thermal conditions in a laboratory. The subjects slept in a sleeping bag under an unheated tent during the cold exposure. Apart from polysomnographic and body temperature recordings, electrocardiograms were taken through a telemetric system for safety purposes. Heart rates were noted at 5-min intervals and averaged hourly. In both environmental conditions, heart rate decreased within the first two hours of sleep. Comparison of the data obtained during cold exposure vs. thermal neutrality revealed lower values of heart rate in the cold, while body temperatures remained within normal range. This cold-induced bradycardia supervening during night sleep is discussed in terms of the occurrence of a vagal reflex preventing central blood pressure to rise.

  13. Dry cooling with night cool storage to enhance solar power plants performance in extreme conditions areas

    International Nuclear Information System (INIS)

    Muñoz, J.; Martínez-Val, J.M.; Abbas, R.; Abánades, A.

    2012-01-01

    Highlights: ► Solar thermo-electric power plants with thermal storage for condenser cooling. ► Technology to mitigate the negative effect on Rankine cycles of the day-time high temperatures in deserts. ► Electricity production augmentation in demand-peak hours by the use of day-night temperature difference. -- Abstract: Solar thermal power plants are usually installed in locations with high yearly average solar radiation, often deserts. In such conditions, cooling water required for thermodynamic cycles is rarely available. Moreover, when solar radiation is high, ambient temperature is very high as well; this leads to excessive condensation temperature, especially when air-condensers are used, and decreases the plant efficiency. However, temperature variation in deserts is often very high, which drives to relatively low temperatures during the night. This fact can be exploited with the use of a closed cooling system, so that the coolant (water) is chilled during the night and store. Chilled water is then used during peak temperature hours to cool the condenser (dry cooling), thus enhancing power output and efficiency. The present work analyzes the performance improvement achieved by night thermal cool storage, compared to its equivalent air cooled power plant. Dry cooling is proved to be energy-effective for moderately high day–night temperature differences (20 °C), often found in desert locations. The storage volume requirement for different power plant efficiencies has also been studied, resulting on an asymptotic tendency.

  14. Night shift preparation, performance, and perception: are there differences between emergency medicine nurses, residents, and faculty?

    Science.gov (United States)

    Richards, John R; Stayton, Taylor L; Wells, Jason A; Parikh, Aman K; Laurin, Erik G

    2018-04-30

    Determine differences between faculty, residents, and nurses regarding night shift preparation, performance, recovery, and perception of emotional and physical health effects. Survey study performed at an urban university medical center emergency department with an accredited residency program in emergency medicine. Forty-seven faculty, 37 residents, and 90 nurses completed the survey. There was no difference in use of physical sleep aids between groups, except nurses utilized blackout curtains more (69%) than residents (60%) and faculty (45%). Bedroom temperature preference was similar. The routine use of pharmacologic sleep aids differed: nurses and residents (both 38%) compared to faculty (13%). Residents routinely used melatonin more (79%) than did faculty (33%) and nurses (38%). Faculty preferred not to eat (45%), whereas residents (24%) preferred a full meal. The majority (>72%) in all groups drank coffee before their night shift and reported feeling tired despite their routine, with 4:00 a.m. as median nadir. Faculty reported a higher rate (41%) of falling asleep while driving compared to residents (14%) and nurses (32%), but the accident rate (3% to 6%) did not differ significantly. All had similar opinions regarding night shift-associated health effects. However, faculty reported lower level of satisfaction working night shifts, whereas nurses agreed less than the other groups regarding increased risk of drug and alcohol dependence. Faculty, residents, and nurses shared many characteristics. Faculty tended to not use pharmacologic sleep aids, not eat before their shift, fall asleep at a higher rate while driving home, and enjoy night shift work less.

  15. Application of PCM energy storage in combination with night ventilation for space cooling

    International Nuclear Information System (INIS)

    Barzin, Reza; Chen, John J.J.; Young, Brent R.; Farid, Mohammed M.

    2015-01-01

    Highlights: • Night ventilation were tested in combination with PCM-impregnated gypsum boards. • The Price-based method were experimentally used to perform peak load shifting. • Importance of the application of a smart control were experimentally investigated. • A cost and energy saving up to 93% and 92% per day respectively were achieved. - Abstract: In recent years, as a result of the continuous increase in energy demand, the use of energy storage has become increasingly important. To address this problem, the application of phase change materials (PCM) in buildings has received attention because of their high energy storage density and their ease of incorporation in building envelopes. Despite large experimental works conducted on the application phase change materials in buildings, there is very little work done on this application in combination with night ventilation. In this study, the application of night ventilation in combination with PCM-impregnated gypsum boards for cooling purposes was experimentally investigated. Two identical test huts equipped with “smart” control systems were used for testing the concept. One hut was constructed using impregnated gypsum boards, while the other hut was finished with ordinary gypsum board. Initially an air conditioning (AC) unit, without night ventilation, was used in both huts to charge the PCM during low peak period, showing very little savings in electricity. However, when night ventilation was used to charge the PCM instead, a weekly electricity saving of 73% was achieved.

  16. WINDII airglow observations of wave superposition and the possible association with historical "bright nights"

    Science.gov (United States)

    Shepherd, G. G.; Cho, Y.-M.

    2017-07-01

    Longitudinal variations of airglow emission rate are prominent in all midlatitude nighttime O(1S) lower thermospheric data obtained with the Wind Imaging Interferometer (WINDII) on the Upper Atmosphere Research Satellite (UARS). The pattern generally appears as a combination of zonal waves 1, 2, 3, and 4 whose phases propagate at different rates. Sudden localized enhancements of 2 to 4 days duration are sometimes evident, reaching vertically integrated emission rates of 400 R, a factor of 10 higher than minimum values for the same day. These are found to occur when the four wave components come into the same phase at one longitude. It is shown that these highly localized longitudinal maxima are consistent with the historical phenomena known as "bright nights" in which the surroundings of human dark night observers were seen to be illuminated by this enhanced airglow.Plain Language SummaryFor centuries, going back to the Roman era, people have recorded experiences of brightened skies during the night, called "bright nights." Currently, scientists study airglow, an emission of light from the high atmosphere, 100 km above us. Satellite observations of a green airglow have shown that it consists of waves 1, 2, 3, and 4 around the earth. It happens that when the peaks of the different waves coincide there is an airglow brightening, and this article demonstrates that this event produces a bright night. The modern data are shown to be entirely consistent with the historical observations.

  17. Climatic potential for passive cooling of buildings by night-time ventilation in Europe

    International Nuclear Information System (INIS)

    Artmann, N.; Manz, H.; Heiselberg, P.

    2007-01-01

    Due to an overall trend towards less heating and more cooling demands in buildings in many European countries over the last few decades, passive cooling by night-time ventilation is seen as a promising technique, particularly for commercial buildings in the moderate or cold climates of Central, Eastern and Northern Europe. The basic concept involves cooling the building structure overnight in order to provide a heat sink that is available during the occupancy period. In this study, the potential for passive cooling of buildings by night-time ventilation was evaluated by analysing climatic data, without considering any building-specific parameters. An approach for calculating degree-hours based on a variable building temperature - within a standardized range of thermal comfort - is presented and applied to climatic data of 259 stations all over Europe. The results show a high potential for night-time ventilative cooling over the whole of Northern Europe and still significant potential in Central, Eastern and even some regions of Southern Europe. However, due to the inherent stochastic properties of weather patterns, a series of warmer nights can occur at some locations, where passive cooling by night-time ventilation alone might not be sufficient to guarantee thermal comfort

  18. Night Vision Image De-Noising of Apple Harvesting Robots Based on the Wavelet Fuzzy Threshold

    Directory of Open Access Journals (Sweden)

    Chengzhi Ruan

    2015-12-01

    Full Text Available In this paper, the de-noising problem of night vision images is studied for apple harvesting robots working at night. The wavelet threshold method is applied to the de-noising of night vision images. Due to the fact that the choice of wavelet threshold function restricts the effect of the wavelet threshold method, the fuzzy theory is introduced to construct the fuzzy threshold function. We then propose the de-noising algorithm based on the wavelet fuzzy threshold. This new method can reduce image noise interferences, which is conducive to further image segmentation and recognition. To demonstrate the performance of the proposed method, we conducted simulation experiments and compared the median filtering and the wavelet soft threshold de-noising methods. It is shown that this new method can achieve the highest relative PSNR. Compared with the original images, the median filtering de-noising method and the classical wavelet threshold de-noising method, the relative PSNR increases 24.86%, 13.95%, and 11.38% respectively. We carry out comparisons from various aspects, such as intuitive visual evaluation, objective data evaluation, edge evaluation and artificial light evaluation. The experimental results show that the proposed method has unique advantages for the de-noising of night vision images, which lay the foundation for apple harvesting robots working at night.

  19. Ideas of Kindergarten Students on the Day-Night Cycles, the Seasons and the Moon Phases

    Science.gov (United States)

    Küçüközer, Hüseyin; Bostan, Ayberk

    2010-01-01

    The aim of this study is to determine ideas of the kindergarten students on day-night, seasons, and the phases of the Moon. Although there are lots of studies on kindergarten students about science education, few of them are present on astronomy. Fifty-two students (age 6) from four different kindergartens were chosen as a sample of the study. The…

  20. Impacts of day versus night warming on soil microclimate: results from a semiarid temperate steppe.

    Science.gov (United States)

    Xia, Jianyang; Chen, Shiping; Wan, Shiqiang

    2010-06-15

    One feature of climate warming is that increases in daily minimum temperature are greater than those in daily maximum temperature. Changes in soil microclimate in response to the asymmetrically diurnal warming scenarios can help to explain responses of ecosystem processes. In the present study, we examined the impacts of day, night, and continuous warming on soil microclimate in a temperate steppe in northern China. Our results showed that day, night, and continuous warming (approximately 13Wm(-2) with constant power mode) significantly increased daily mean soil temperature at 10cm depth by 0.71, 0.78, and 1.71 degrees C, respectively. Night warming caused greater increases in nighttime mean and daily minimum soil temperatures (0.74 and 0.99 degrees C) than day warming did (0.60 and 0.66 degrees C). However, there were no differences in the increases in daytime mean and daily maximum soil temperature between day (0.81 and 1.13 degrees C) and night (0.81 and 1.10 degrees C) warming. The differential effects of day and night warming on soil temperature varied with environmental factors, including photosynthetic active radiation, vapor-pressure deficit, and wind speed. When compared with the effect of continuous warming on soil temperature, the summed effects of day and night warming were lower during daytime, but greater at night, thus leading to equality at daily scale. Mean volumetric soil moisture at the depth of 0-40cm significantly decreased under continuous warming in both 2006 (1.44 V/V%) and 2007 (0.76 V/V%). Day warming significantly reduced volumetric soil moisture only in 2006, whereas night warming had no effect on volumetric soil moisture in both 2006 and 2007. Given the different diurnal warming patterns and variability of environmental factors among ecosystems, these results highlight the importance of incorporating the differential impacts of day and night warming on soil microclimate into the predictions of terrestrial ecosystem responses to climate

  1. Impacts of day versus night warming on soil microclimate: Results from a semiarid temperate steppe

    International Nuclear Information System (INIS)

    Xia, Jianyang; Chen, Shiping; Wan, Shiqiang

    2010-01-01

    One feature of climate warming is that increases in daily minimum temperature are greater than those in daily maximum temperature. Changes in soil microclimate in response to the asymmetrically diurnal warming scenarios can help to explain responses of ecosystem processes. In the present study, we examined the impacts of day, night, and continuous warming on soil microclimate in a temperate steppe in northern China. Our results showed that day, night, and continuous warming (approximately 13 W m -2 with constant power mode) significantly increased daily mean soil temperature at 10 cm depth by 0.71, 0.78, and 1.71 o C, respectively. Night warming caused greater increases in nighttime mean and daily minimum soil temperatures (0.74 and 0.99 o C) than day warming did (0.60 and 0.66 o C). However, there were no differences in the increases in daytime mean and daily maximum soil temperature between day (0.81 and 1.13 o C) and night (0.81 and 1.10 o C) warming. The differential effects of day and night warming on soil temperature varied with environmental factors, including photosynthetic active radiation, vapor-pressure deficit, and wind speed. When compared with the effect of continuous warming on soil temperature, the summed effects of day and night warming were lower during daytime, but greater at night, thus leading to equality at daily scale. Mean volumetric soil moisture at the depth of 0-40 cm significantly decreased under continuous warming in both 2006 (1.44 V/V%) and 2007 (0.76 V/V%). Day warming significantly reduced volumetric soil moisture only in 2006, whereas night warming had no effect on volumetric soil moisture in both 2006 and 2007. Given the different diurnal warming patterns and variability of environmental factors among ecosystems, these results highlight the importance of incorporating the differential impacts of day and night warming on soil microclimate into the predictions of terrestrial ecosystem responses to climate warming.

  2. The day to night absorption ratio in auroral and subauroral zone riometer measurements during auroral absorption

    International Nuclear Information System (INIS)

    Ranta, H.; Ranta, A.; Rosenberg, T.J.

    1984-01-01

    The day to night ratio of auroral absorption has been studied using data from auroral and subauroral latitudes and by application of different kinds of statistical analyses. Ratios between 0.5 and 3.0 are obtained, depending on the criteria applied to the selection of data. Previous studies obtained similar ratios, but reached different conclusions about the effective solar control of auroral absorption. It is concluded here that evidence of solar control of the day to night ratio of auroral absorption, or the lack thereof, cannot be extracted by these statistical analyses. (author)

  3. 24 Hours chronomics of ambulatory blood pressure and its relation with circadian rhythm of 6-sulfatoxy melatonin in night shift health care workers

    OpenAIRE

    B. Anjum; Narsingh Verma; Sandeep Tiwari; Abbas A Mahdi; Ranjana Singh; Qulsoom Naaz; Saumya Mishra; Prerna Singh; Suman Gautam; Shipra Bhardwaj

    2015-01-01

    Background: Night shift workers have altered circadian pattern of blood pressure/heart rate and hormones like melatonin and cortisol. Due to this variation, night shift worker suffers from various cardiovascular disorders and hormonal disturbances. Methods: The Present study was aimed to investigate the effects of rotating night shift on 24 hours chronomics of BP/HR and its relation with 6-sulfatoxy melatonin levels. 62 healthy nursing professionals, aged 20-40 year, performing day and ni...

  4. Social crowding in the night-time reduces an anxiety-like behavior and increases social interaction in adolescent mice.

    Science.gov (United States)

    Ago, Yukio; Tanaka, Tatsunori; Ota, Yuki; Kitamoto, Mari; Imoto, Emina; Takuma, Kazuhiro; Matsuda, Toshio

    2014-08-15

    Rearing in crowded conditions is a psychosocial stressor that affects biological functions. The effects of continuous crowding for many days have been studied, but those of crowding over a limited time have not. In this study, we examined the effects of night-time or daytime crowding over 2 weeks on behavior in adolescent and adult mice. Crowding (20 mice/cage) in either the night-time or daytime did not affect locomotor activity in the open field test or cognitive function in the fear conditioning test. In contrast, night-time crowding, but not daytime crowding, had an anxiolytic effect in the elevated plus-maze test and increased social interaction in adolescent mice, but not in adult mice. The first night-time, but not daytime, crowding increased plasma corticosterone levels in adolescent mice, although night-time crowding over 2 weeks did not affect the corticosterone levels. Furthermore, no significant effects of the first crowding were observed in adult mice. In a second crowding condition (six mice/small cage), the anxiolytic-like effects of night-time crowding and the change in plasma corticosterone levels were not observed, suggesting that the density of mice is not important for the behavioral consequences of crowding. Night-time crowding did not affect neurotrophic/growth factor levels and hippocampal neurogenesis in adolescent mice. These findings suggest that night-time crowding leads to anxiolytic-like behaviors in adolescent mice, and imply that night-time crowding stress in adolescence may be beneficial to brain functions. Copyright © 2014 Elsevier B.V. All rights reserved.

  5. Measuring urban sprawl in China by night time light images

    Science.gov (United States)

    Liu, Lu; Tang, Lin

    2017-01-01

    In the process of urbanization, a phenomenon called “urban sprawl” usually occurs. This phenomenon may exaggerated the negative effects of urbanization on environment, public and social health, energy efficiency, and maintenance of farmland. Therefore, the understanding of this phenomenon is urgently required for us to achieve sustainable development. This study proposed a group of night time lights (NTL) indicators of urban sprawl, which intend to use the distribution of lightness to quantify urban sprawl. These measures are proved to be efficient in describing urban sprawl. In addition, they are consistent and easy calculating, making comparison analysis easy to be done. These indicators are used to study urban sprawl in China during the year 2000 to 2010, the results show that in the last ten years, metropolitan areas in the northern part of China have undergone a more sprawl-like urban growth compared with other parts of China.

  6. Deliverance from the "Dark Night of the Soul"

    Science.gov (United States)

    Kinnier, Richard T.; Dixon, Andrea L.; Scheidegger, Corey; Lindberg, Brent

    2009-01-01

    For many individuals, spiritual inspiration, clarity, or epiphany is often preceded by a "dark night of the soul". St. John of the Cross, a Spanish mystic of the 16th century, first described the concept. Today, the phrase "dark night of the soul" is usually associated with the crisis part of the journey to enlightenment. This article defines and…

  7. 46 CFR 9.5 - Night, Sunday, and holiday defined.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 1 2010-10-01 2010-10-01 false Night, Sunday, and holiday defined. 9.5 Section 9.5... COMPENSATION FOR OVERTIME SERVICES § 9.5 Night, Sunday, and holiday defined. (a) For the purpose of this part... term holiday shall mean only national legal public holidays, viz., January 1, February 22, May 30, July...

  8. 78 FR 19742 - Centennial Challenges: 2014 Night Rover Challenge

    Science.gov (United States)

    2013-04-02

    ... NATIONAL AERONAUTICS AND SPACE ADMINISTRATION [Notice 13-032] Centennial Challenges: 2014 Night... Centennial Challenges 2014 Night Rover Challenge. SUMMARY: This notice is issued in accordance with 51 U.S.C.... Centennial Challenges is a program of prize competitions to stimulate innovation in technologies of interest...

  9. INVIS : Integrated night vision surveillance and observation system

    NARCIS (Netherlands)

    Toet, A.; Hogervorst, M.A.; Dijk, J.; Son, R. van

    2010-01-01

    We present the design and first field trial results of the all-day all-weather INVIS Integrated Night Vision surveillance and observation System. The INVIS augments a dynamic three-band false-color nightvision image with synthetic 3D imagery in a real-time display. The night vision sensor suite

  10. Psyche and Society in Sendak's "In the Night Kitchen"

    Science.gov (United States)

    Adams, Rebecca V. L.; Rabkin, Eric S.

    2007-01-01

    While "Where the Wild Things Are" may be Maurice Sendak's most popular book, "In the Night Kitchen" is arguably the greater work. Though his journey in "Wild Things" shares many of the elements of Mickey's adventure in "Night Kitchen"--swinging between the protagonist's initiatory verbal assertions and silent, completely pictorial spreads that…

  11. 'Irrigation by night' in the Eastern Cape, South Africa

    African Journals Online (AJOL)

    2017-01-01

    Jan 1, 2017 ... tions in irrigation systems in the night: 'It is common place that the night is the time ..... roads and rainwater tanks ('JoJo's') to water the gardens. The ..... drainage system throughout the home garden, but also directly from the ...

  12. Nonelective surgery at night and in-hospital mortality

    DEFF Research Database (Denmark)

    van Zaane, Bas; van Klei, Wilton A; Buhre, Wolfgang F

    2015-01-01

    BACKGROUND: Evidence suggests that sleep deprivation associated with night-time working may adversely affect performance resulting in a reduction in the safety of surgery and anaesthesia. OBJECTIVE: Our primary objective was to evaluate an association between nonelective night-time surgery and in...

  13. Effects of Instruction on Preservice Elementary Teachers' Conceptions of the Causes of Night and Day and the Seasons.

    Science.gov (United States)

    Atwood, Ronald K.; Atwood, Virginia A.

    1997-01-01

    Details a study that tests the effectiveness of brief instruction on the causes of night and day and the seasons. Employs simple, inexpensive models. Findings are useful for science teacher educators. Contains 32 references. (DDR)

  14. Day-night effect in solar neutrino oscillations with three flavors

    International Nuclear Information System (INIS)

    Blennow, Mattias; Ohlsson, Tommy; Snellman, Haakan

    2004-01-01

    We investigate the effects of a nonzero leptonic mixing angle θ 13 on the solar neutrino day-night asymmetry. Using a constant matter density profile for the Earth and well-motivated approximations, we derive analytical expressions for the ν e survival probabilities for solar neutrinos arriving directly at the detector and for solar neutrinos which have passed through the Earth. Furthermore, we numerically study the effects of a nonzero θ 13 on the day-night asymmetry at detectors and find that they are small. Finally, we show that if the uncertainties in the parameters θ 12 and Δm 2 as well as the uncertainty in the day-night asymmetry itself were much smaller than they are today, this effect could, in principle, be used to determine θ 13

  15. Night-shift work and breast cancer--a systematic review and meta-analysis.

    Science.gov (United States)

    Ijaz, Sharea; Verbeek, Jos; Seidler, Andreas; Lindbohm, Marja-Liisa; Ojajärvi, Anneli; Orsini, Nicola; Costa, Giovanni; Neuvonen, Kaisa

    2013-09-01

    The aim of this review was to synthesize the evidence on the potential relationship between nightshift work and breast cancer. We searched multiple databases for studies comparing women in shift work to those with no-shift work reporting incidence of breast cancer. We calculated incremental risk ratios (RR) per five years of night-shift work and per 300 night shift increases in exposure and combined these in a random effects dose-response meta-analysis. We assessed study quality in ten domains of bias. We identified 16 studies: 12 case-control and 4 cohort studies. There was a 9% risk increase per five years of night-shift work exposure in case-control studies [RR 1.09, 95% confidence interval (95% CI) 1.02-1.20; I (2) = 37%, 9 studies], but not in cohort studies (RR 1.01, 95% CI 0.97-1.05; I (2) = 53%, 3 studies). Heterogeneity was significant overall (I (2) = 55%, 12 studies). Results for 300 night shifts were similar (RR 1.04, 95% CI 1.00-1.10; I (2) = 58%, 8 studies). Sensitivity analysis using exposure transformations such as cubic splines, a fixed-effect model, or including only better quality studies did not change the results. None of the 16 studies had a low risk of bias, and 6 studies had a moderate risk. Based on the low quality of exposure data and the difference in effect by study design, our findings indicate insufficient evidence for a link between night-shift work and breast cancer. Objective prospective exposure measurement is needed in future studies.

  16. Artificial light at night alters trophic interactions of intertidal invertebrates.

    Science.gov (United States)

    Underwood, Charlotte N; Davies, Thomas W; Queirós, Ana M

    2017-07-01

    Despite being globally widespread in coastal regions, the impacts of light pollution on intertidal ecosystems has received little attention. Intertidal species exhibit many night-time-dependent ecological strategies, including feeding, reproduction, orientation and predator avoidance, which are likely negatively affected by shifting light regimes, as has been observed in terrestrial and aquatic taxa. Coastal lighting may shape intertidal communities through its influence on the nocturnal foraging activity of dogwhelks (Nucella lapillus), a widespread predatory mollusc that structures biodiversity in temperate rocky shores. In the laboratory, we investigated whether the basal and foraging activity of this predator was affected by exposure to night-time lighting both in the presence and absence of olfactory predator cues (Carcinus maenas, common shore crab). Assessments of dogwhelks' behavioural responses to night-time white LED lighting were performed on individuals that had been acclimated to night-time white LED lighting conditions for 16 days and individuals that had not previously been exposed to artificial light at night. Dogwhelks acclimated to night-time lighting exhibited natural refuge-seeking behaviour less often compared to control animals, but were more likely to respond to and handle prey irrespective of whether olfactory predator cues were present. These responses suggest night-time lighting likely increased the energetic demand of dogwhelks through stress, encouraging foraging whenever food was available, regardless of potential danger. Contrastingly, whelks not acclimated under night-time lighting were more likely to respond to the presence of prey under artificial light at night when olfactory predator cues were present, indicating an opportunistic shift towards the use of visual instead of olfactory cues in risk evaluation. These results demonstrate that artificial night-time lighting influences the behaviour of intertidal fauna such that the

  17. Time of exposure to night work and carotid atherosclerosis: a structural equation modeling approach using baseline data from ELSA-Brasil.

    Science.gov (United States)

    Silva-Costa, Aline; Guimarães, Joanna; Chor, Dora; de Jesus Mendes da Fonseca, Maria; Bensenor, Isabela; Santos, Itamar; Barreto, Sandhi; Griep, Rosane Härter

    2018-04-02

    The study of cardiovascular diseases (CVD) associated with night work is difficult due to the long period required for conditions to manifest and the healthy-worker effect. Analyzing asymptomatic pre-clinical changes in the atherosclerotic process is a way to assess the pathways between exposure to night work and CVD. To evaluate the associations between night work and subclinical atherosclerosis measured by carotid intima-media thickness (CIMT) using baseline data from the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). We conducted cross-sectional analyses using baseline data (2008-2010) from 9785 civil servants, aged 35-74 years. The associations between time of exposure to night work and mean CIMT were examined using a structural equation model. The sample included 4259 men and 5526 women, mean age of 51.6 years. A total of 1778 (18.2%) individuals were exposed to night work (594 current and 1184 former night workers), and the mean years of night work exposed was 11.47 (SD = 9.45) years. On average, mean CIMT was 0.606 (SD = 0.130) mm. Among men, the increase in exposure to night work was significantly associated with an increase in BMI and CIMT. Among women, night work was not associated with increased CIMT. In relation to the indirect associations, results suggest a possible mediation by BMI, diabetes and hypertension on the association between the years of night work and mean CIMT only among men. Night work was associated with increased CIMT only among men. These findings add to the knowledge of the possible pathways that link night work and carotid atherosclerosis. Additionally, these results contribute to the recognition of work schedules as a public health problem that should be addressed by the medical community and policy makers.

  18. What's crucial in night vision goggle simulation?

    Science.gov (United States)

    Kooi, Frank L.; Toet, Alexander

    2005-05-01

    Training is required to correctly interpret NVG imagery. Training night operations with simulated intensified imagery has great potential. Compared to direct viewing with the naked eye, intensified imagery is relatively easy to simulate and the cost of real NVG training is high (logistics, risk, civilian sleep deprivation, pollution). On the surface NVG imagery appears to have a structure similar to daylight imagery. However, in actuality its characteristics differ significantly from those of daylight imagery. As a result, NVG imagery frequently induces visual illusions. To achieve realistic training, simulated NVG imagery should at least reproduce the essential visual limitations of real NVG imagery caused by reduced resolution, reduced contrast, limited field-of-view, the absence of color, and the systems sensitivity to nearby infrared radiation. It is particularly important that simulated NVG imagery represents essential NVG visual characteristics, such as the high reflection of chlorophyll and halos. Current real-time simulation software falls short for training purposes because of an incorrect representation of shadow effects. We argue that the development of shading and shadowing merits priority to close the gap between real and simulated NVG flight conditions. Visual conspicuity can be deployed as an efficient metric to measure the 'perceptual distance' between the real NVG and the simulated NVG image.

  19. PARTICLE-larly Enriching Night at CERN!

    CERN Multimedia

    Yves-Marie Ducimetière

    2010-01-01

    After the 2010 European Researchers' Night, a contest was organised for its participants, asking them to write about their experience. We are now pleased to announce the winner: Yves-Marie Ducimetière, a 14-year-old student at the Lycée International de Ferney-Voltaire.    Yves-Marie Ducimetière. The visit began for me around 20.30, as we all joined our respective groups to board a CERN shuttle to our final destination, which was LHCb in my case. I was heading into the unknown! On leaving, I knew nothing about this place, and the discovery made it all the more interesting. Upon arriving, a woman explained that their research looked at antimatter, or rather, the reason why it disappeared from our Universe – she then accompanied us inside. Amazingly, I found the place to be both friendly and serious. One physicist spoke passionately about the purpose of LHCb, in short: colliding particles in order to understand the Big Bang, the origin of t...

  20. Krill (Meganyctiphanes norvegica) swim faster at night

    KAUST Repository

    Klevjer, Thor A.

    2011-05-01

    Krill are key members in marine food webs, and measurement of swimming speed is vital to assess their bioenergetic budgets, feeding, and encounters with predators. We document a consistent and marked diel signal in swimming speed of krill in their natural habitat that is not related to diel vertical migration. The results were obtained using a bottom-mounted, upward-looking echo sounder at 150-m depth in the Oslofjord, Norway, spanning 5 months from late autumn to spring at a temporal resolution of ~1–2 records s−1. Swimming speed was assessed using acoustic target tracking of individual krill. At the start of the registration period, both daytime and nocturnal average swimming speeds of Meganyctiphanes norvegica were ~ 3.5 cm s−1 (~ 1 body lengths ([bl] s−1) in waters with oxygen concentrations of ~ 15–20% O2 saturation. Following intrusion of more oxygenated water, nocturnal average swimming speeds increased to ~ 10 cm s−1 (~ 3 bl s−1), i.e., more than double that of daytime swimming speeds in the same period. We hypothesize that krill activity during the first period was limited by oxygen, and the enhanced swimming at night subsequent to the water renewal is due to increased feeding activity under lessened danger of predation in darkness.

  1. Visualization on the Day Night Year Globe

    International Nuclear Information System (INIS)

    Božić, Mirjana; Vušković, Leposava; Popović, Svetozar; Popović, Jelena; Marković-Topalović, Tatjana

    2016-01-01

    The story about a properly oriented outdoor globe in the hands and minds of Eratosthenes, Jefferson, Milanković and science educators is presented. Having the same orientation in space as the Earth, the Day Night Year Globe (DING) shows in real time the pattern of illumination of the Earth’s surface and its diurnal and seasonal variations. It is an ideal object for the visualization of knowledge and increase in knowledge about: the form of the Earth, Earth’s rotation, Earth’s revolution around the Sun, the length of seasons, solstices, equinoxes, the longitude problem, the distribution of the Sun’s radiation over the Earth, the impact of this radiation on Earth’s climate, and how to use it efficiently. By attaching a movable vane to the poles, or adding pins around the equator to read time, DING becomes a spherical/globe-shaped sundial. So, the DING is simultaneously useful for teaching physics, geophysics, astronomy, use of solar energy and promoting an inquiry-based learning environment for students and the public. (paper)

  2. Krill (Meganyctiphanes norvegica) swim faster at night

    KAUST Repository

    Klevjer, Thor A.; Kaartvedt, Stein

    2011-01-01

    Krill are key members in marine food webs, and measurement of swimming speed is vital to assess their bioenergetic budgets, feeding, and encounters with predators. We document a consistent and marked diel signal in swimming speed of krill in their natural habitat that is not related to diel vertical migration. The results were obtained using a bottom-mounted, upward-looking echo sounder at 150-m depth in the Oslofjord, Norway, spanning 5 months from late autumn to spring at a temporal resolution of ~1–2 records s−1. Swimming speed was assessed using acoustic target tracking of individual krill. At the start of the registration period, both daytime and nocturnal average swimming speeds of Meganyctiphanes norvegica were ~ 3.5 cm s−1 (~ 1 body lengths ([bl] s−1) in waters with oxygen concentrations of ~ 15–20% O2 saturation. Following intrusion of more oxygenated water, nocturnal average swimming speeds increased to ~ 10 cm s−1 (~ 3 bl s−1), i.e., more than double that of daytime swimming speeds in the same period. We hypothesize that krill activity during the first period was limited by oxygen, and the enhanced swimming at night subsequent to the water renewal is due to increased feeding activity under lessened danger of predation in darkness.

  3. Popular actions: For the right at night

    International Nuclear Information System (INIS)

    Suarez, Alfredo

    1999-01-01

    In 1997 a teacher of the school The Deer of Tauramena established a popular action against the companies that exploit the petroleum of the field Cusiana. Maria Ninfa Diaz and her husband Eleodoro Torres, a couple of peasants tormented behind from years by the presence in their sidewalk of gigantic firebrands that they burn natural gas as forced part of the oil activity. Burdened by the permanent noise of something like that as an enormous torch. Gone mad by the splendor in the nights of minuscule industrial suns. Tired by the increase of the temperature in their corner of the prairie. The life became less pleasant. Before the only sound was fluttering of the bats and the step of the livestock, actors of a time that became past in the immense green sea, when the plain was flat. Perhaps from the optics of the demanded companies this it is an ordinary litigation; it should be won to all coast, so much but when the companies needs to sit down a precedent that is already common place in the plain; doesn't enter with the oil companies and so that they didn't enter with the oil companies the defendants hired an lawyers office that gets paid per hours and they wait, eagerly, to rob Maria Ninfa Diaz of the property where she lives. The author continues relating the impasse between the peasant and the oil multinational company in Colombia

  4. Prevalence and correlates of night eating in the German general population.

    Directory of Open Access Journals (Sweden)

    Martina de Zwaan

    Full Text Available Recently, night eating syndrome (NES was included into the DSM-5 as an example of "Other Specified Feeding and Eating Disorders." The study provides insight into the population prevalence of NES using a large representative German population sample (n = 2,460 with a wide age range (14-85 years. The prevalence of NES was 1.1% using a cut-off on the Night Eating Questionnaire (NEQ of 25. A positive screening for NES was positively associated with depression and anxiety, eating disorder psychopathology, and body weight.

  5. Effects of Shift Work on the Postural and Psychomotor Performance of Night Workers.

    Directory of Open Access Journals (Sweden)

    Fernanda Veruska Narciso

    Full Text Available The purpose of the study was to investigate the effects of shift work on the psychomotor and postural performance of night workers. The study included 20 polysomnography technicians working schedule of 12-h night shift by 36-h off. On the first day of protocol, the body mass and height were measured, and an actigraph was placed on the wrist of each participant. On the second day of protocol, sleepiness by Karolinska Sleepiness Scale, postural control by force platform (30 seconds and psychomotor performance by Psychomotor Vigilance Task (10 minutes were measured before and after 12-h night work. Results showed that after 12-h night work, sleepiness increased by 59% (p<0.001, postural control variables increased by 9% (p = 0.048, and 14% (p = 0.006. Mean reaction time, and the number of lapses of attention increased by 13% (p = 0.006 and 425% (p = 0.015, respectively, but the mean reciprocal reaction time decreased by 7%. In addition, there were correlations between sleepiness and postural control variables with opened eyes (r = 0.616, 95% confidence interval [CI] = 0.361-0.815; r = 0.538; 95% CI = 0.280-0.748 and closed eyes (r = 0.557; 95% CI = 0.304-0.764, r = 0497; 95% CI = 0.325-0.715 and a pronounced effect of sleepiness on postural sway (R2 = 0.393; 95% CI = 0.001-0.03. Therefore, 12-h night work system and sleepiness showed a negative impact in postural and psychomotor vigilance performance of night workers. As unexpected, the force platform was feasibility to detect sleepiness in this population, underscoring the possibility of using this method in the workplace to prevent occupational injuries and accidents.

  6. Night shift work and incidence of diabetes in the Danish Nurse Cohort.

    Science.gov (United States)

    Hansen, Anne B; Stayner, Leslie; Hansen, Johnni; Andersen, Zorana J

    2016-04-01

    Night shift work has been associated with poor sleep, weight gain, metabolic syndrome, which are recognised risk factor for diabetes. However, only a few studies have examined the effect of shift work on diabetes risk. Here, we study the association between shift work and incidence of diabetes in Danish nurses. We used the Danish Nurse Cohort with 28,731 participating female nurses recruited in 1993 (19,898) or 1999 (8833), when self-reported baseline information on diabetes prevalence, lifestyle and working time were collected, and followed them in the Danish Diabetes Register for incidence of diabetes until 2013. Nurses reported whether they worked night, evening, rotating or day shifts. We analysed the association between working time and diabetes incidence using a Cox proportional hazards model adjusted for diabetes risk factors, separately with and without adjustment for body mass index (BMI) which might be an intermediate variable. Of 19,873 nurses who worked and were diabetes-free at recruitment, 837 (4.4%) developed diabetes during 15 years of follow-up. The majority of nurses (62.4%) worked day shifts, 21.8% rotating shift, 10.1% evening and 5.5% night shifts. Compared with nurses who worked day shifts, we found statistically significantly increased risk of diabetes in nurses who worked night (1.58; 1.25 to 1.99) or evening shifts (1.29; 1.04 to 1.59) in the fully adjusted models including BMI. Danish nurses working night and evening shifts have increased risk for diabetes, with the highest risk associated with current night shift work. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/

  7. The association of sleep and late-night cell phone use among adolescents

    Directory of Open Access Journals (Sweden)

    Babak Amra

    Full Text Available Abstract Objective: This study aims to assess the relationship of late-night cell phone use with sleep duration and quality in a sample of Iranian adolescents. Methods: The study population consisted of 2400 adolescents, aged 12-18 years, living in Isfahan, Iran. Age, body mass index, sleep duration, cell phone use after 9 p.m., and physical activity were documented. For sleep assessment, the Pittsburgh Sleep Quality Index questionnaire was used. Results: The participation rate was 90.4% (n = 2257 adolescents. The mean (SD age of participants was 15.44 (1.55 years; 1270 participants reported to use cell phone after 9 p.m. Overall, 56.1% of girls and 38.9% of boys reported poor quality sleep, respectively. Wake-up time was 8:17 a.m. (2.33, among late-night cell phone users and 8:03 a.m. (2.11 among non-users. Most (52% late-night cell phone users had poor sleep quality. Sedentary participants had higher sleep latency than their peers. Adjusted binary and multinomial logistic regression models showed that late-night cell users were 1.39 times more likely to have a poor sleep quality than non-users (p-value < 0.001. Conclusion: Late-night cell phone use by adolescents was associated with poorer sleep quality. Participants who were physically active had better sleep quality and quantity. As part of healthy lifestyle recommendations, avoidance of late-night cell phone use should be encouraged in adolescents.

  8. Engaging the Public in the Citizen Science GLOBE at Night Campaign

    Science.gov (United States)

    Walker, Constance E.; Sparks, R. T.; Pompea, S. M.

    2011-05-01

    The emphasis in the international star-hunting campaign, GLOBE at Night, is in bringing awareness to the public on issues of light pollution. Light pollution threatens not only observatory sites and our "right to starlight", but can affect energy consumption, wildlife and health. GLOBE at Night has successfully reached a few 100,000 citizen-scientists. What steps can be taken to improve it? To promote the campaign via popular social media, GLOBE at Night created Facebook and Twitter pages. To increase participation in the 2011 campaign, children and adults submitted their sky brightness measurements in real time with smart phones or tablets using the web application at www.globeatnight.org/webapp/. With smart phones and tablets, the location, date and time register automatically. For those without smart mobile devices, user-friendly tools on the GLOBE at Night report page were reconfigured to determine latitude and longitude more easily and accurately. To increase the robustness of the data, 2 new approaches were taken. GLOBE at Night prototyped an "Adopt a Street” program in Tucson. The aim was for people to adopt different major or semi-major streets and take measurements every mile or so for the length of the street. The grid of measurements would canvas the town, allowing for comparisons of light levels over time (hours, days, years) or search for dark sky oases or light polluted areas. The increase to 2 campaigns in 2011 re-enforces these studies. The intent is to offer the program year-round for seasonal studies. The data can also be used to compare with datasets on wildlife, health, and energy consumption. Recently, NOAO and the Arizona Game and Fish Department have started a project with GLOBE at Night data and bat telemetry to examine a dark skies corridor in Tucson where the endangered bats fly. In our presentation, results of our efforts are discussed.

  9. The association of sleep and late-night cell phone use among adolescents.

    Science.gov (United States)

    Amra, Babak; Shahsavari, Ali; Shayan-Moghadam, Ramin; Mirheli, Omid; Moradi-Khaniabadi, Bita; Bazukar, Mehdi; Yadollahi-Farsani, Ashkan; Kelishadi, Roya

    This study aims to assess the relationship of late-night cell phone use with sleep duration and quality in a sample of Iranian adolescents. The study population consisted of 2400 adolescents, aged 12-18 years, living in Isfahan, Iran. Age, body mass index, sleep duration, cell phone use after 9p.m., and physical activity were documented. For sleep assessment, the Pittsburgh Sleep Quality Index questionnaire was used. The participation rate was 90.4% (n=2257 adolescents). The mean (SD) age of participants was 15.44 (1.55) years; 1270 participants reported to use cell phone after 9p.m. Overall, 56.1% of girls and 38.9% of boys reported poor quality sleep, respectively. Wake-up time was 8:17 a.m. (2.33), among late-night cell phone users and 8:03a.m. (2.11) among non-users. Most (52%) late-night cell phone users had poor sleep quality. Sedentary participants had higher sleep latency than their peers. Adjusted binary and multinomial logistic regression models showed that late-night cell users were 1.39 times more likely to have a poor sleep quality than non-users (p-value<0.001). Late-night cell phone use by adolescents was associated with poorer sleep quality. Participants who were physically active had better sleep quality and quantity. As part of healthy lifestyle recommendations, avoidance of late-night cell phone use should be encouraged in adolescents. Copyright © 2017. Published by Elsevier Editora Ltda.

  10. The response of rice (Oryza sativa L. to elevated night temperature with application of Pyraclostobin

    Directory of Open Access Journals (Sweden)

    T.Y. Wahjanto

    2016-07-01

    Full Text Available Rice productivity is having a problem related with climate change phenomenon, mainly the global warming. The rising of temperature in some country threat the rice production. The increasing of temperature is a major limiting factor that affects yield through the growth and development of rice plant. This study was aimed to examine the response of rice (Oryza sativa L. to elevated night temperature with the application of Pyraclostobin. A glasshouse experiment that was conducted from March to August 2015 at Brawijaya University Research Station of Jatikerto – Malang, used nested plot design with three replications and two treatments. The first treatments were the night temperature level (normal temperature, increased 2oC, and increased 4oC. The second treatments were the concentration of Pyraclostrobin (0 ppm, 400 ppm and 800 ppm. Results of the study showed that the increase of temperature at night for about 2oC and 4oC, as well as application of Pyraclostrobin, affected growth and yield of rice. Application of Pyraclostrobin by concentrations of 400 ppm and 800 ppm effectively reduced yield loss by increasing night temperature of 2oC, which resulted in 20.20% and 24.93%, respectively, in comparison with the control; while the increase of night temperature by 4oC have resulted 26.86% and 33.33% in comparison with the control. Pyraclostrobin was effective in maintaining percentage of the filled spikelets by the increase of temperature at night for about 2oC and 4oC.

  11. Postprandial metabolic profiles following meals and snacks eaten during simulated night and day shift work.

    Science.gov (United States)

    Al-Naimi, S; Hampton, S M; Richard, P; Tzung, C; Morgan, L M

    2004-01-01

    Shift workers are known to have an increased risk of developing cardiovascular disease (CVD) compared with day workers. An important factor contributing to this increased risk could be the increased incidence of postprandial metabolic risk factors for CVD among shift workers, as a consequence of the maladaptation of endogenous circadian rhythms to abrupt changes in shift times. We have previously shown that both simulated and real shift workers showed relatively impaired glucose and lipid tolerance if a single test meal was consumed between 00:00-02:00 h (night shift) compared with 12:00-14:00 h (day shift). The objective of the present study was to extend these observations to compare the cumulative metabolic effect of consecutive snacks/meals, as might normally be consumed throughout a period of night or day shift work. In a randomized crossover study, eight healthy nonobese men (20-33 yrs, BMI 20-25kg/m2) consumed a combination of two meals and a snack on two occasions following a standardized prestudy meal, simulating night and day shift working (total energy 2500 kcal: 40% fat, 50% carbohydrate, 10% protein). Meals were consumed at 01:00/ 13:00 h and 07:00/19:00h, and the snack at 04:00/16:00 h. Blood was taken after an overnight fast, and for 8 h following the first meal on each occasion, for the measurement of glucose, insulin, triacylglycerol (TAG), and nonesterified fatty acids (NEFA). RM-ANOVA (factors time and shift) showed a significant effect of shift for plasma TAG, with higher levels on simulated night compared to day shift (p effect of shift for plasma glucose, with higher plasma glucose at night (p = 0.08), and there was a time-shift interaction for plasma insulin levels (p shift. Inspection of the area under the plasma response curve (AUC) following each meal and snack revealed that the differences in lipid tolerance occurred throughout the study, with greatest differences occurring following the mid-shift snack. In contrast, glucose tolerance was

  12. Sleepiness, long distance commuting and night work as predictors of driving performance.

    Directory of Open Access Journals (Sweden)

    Lee Di Milia

    Full Text Available Few studies have examined the effect of working night shift and long distance commuting. We examined the association between several sleep related and demographic variables, commuting distance, night work and use of mobile phones on driving performance. We used a prospective design to recruit participants and conducted a telephone survey (n = 649. The survey collected demographic and journey details, work and sleep history and driving performance concerning the day the participant was recruited. Participants also completed the Karolinska Sleepiness Scale and the Epworth Sleepiness Scale. Night workers reported significantly more sleepiness, shorter sleep duration and commuting longer distances. Seven variables were significant predictors of lane crossing. The strongest predictor was acute sleepiness (OR = 5.25, CI, 1.42-19.49, p<0.01 followed by driving ≥150 kms (OR = 3.61, CI, 1.66-7.81, p<0.001, obtaining less than 10 hours sleep in the previous 48 hours (OR = 2.58, CI, 1.03-6.46, p<0.05, driving after night shift (OR = 2.19, CI, 1.24-3.88, p<0.001, being <43 years old (OR = 1.95, CI, 1.11-3.41, p<0.05 and using mobile phones during the journey (OR = 1.90, CI, 1.10-3.27, p<0.05. Sleep related variables, long-distance commuting and night work have a major impact on lane crossing. Several interventions should be considered to reduce the level of sleepiness in night workers.

  13. Prevalence and correlates of drink driving within patrons of Australian night-time entertainment precincts.

    Science.gov (United States)

    Curtis, Ashlee; Coomber, Kerri; Hyder, Shannon; Droste, Nic; Pennay, Amy; Jenkinson, Rebecca; Mayshak, Richelle; Miller, Peter G

    2016-10-01

    Drink driving is a significant public health concern, and contributes to many road fatalities worldwide. The current study is the first to examine the prevalence and correlates of drink driving behavior in a sample of night-time entertainment