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Author Mahdi D. G.; AbdusSamad A. A.
Title Sleep Timing, Light at Night Exposure and it’s Health Effects Among Staff and Students of Bayero University, Kano Type Journal Article
Year 2019 Publication Dutse Journal of Pure and Applied Sciences Abbreviated Journal DUJOPAS
Volume 5 Issue 2b Pages 223-230
Keywords Human Health
Abstract The invention of electricity has pervasively challenged our evolutionary adaptation of dusk to down limited light exposure leading to a conflict between our endogenous biological clocks and the environmental time thus posing a significant health concern. This study therefore explored sleep timing habits, light at night exposure and awareness of its health effects among staff and students of Basic Medical Sciences Faculty of Bayero University, Kano. Data were obtained using a semi- structured, interviewer assisted data capturing form while analysis was done using the statistical package for social sciences (SPSSV20.0) software. Quantitative data were summarized using mean±SD while qualitative data were summarized using frequencies and percentages. Independent samples t- test and person’s Chi-square were used to compare discrete and categorical variables respectively, in all cases, statistical significance was considered at P ≤ 0.05. The results indicated that all the respondents were exposed to LAN. The mean duration of LAN exposure was found to be 5.2±1.4 hours. Late retirement to bed was observed higher among male gender with male students sleeping at 00:21±1.4 hrs and female staff sleeping at 22:20±1.5 hrs. Bivariate analysis reveals a strong positive relationship between LAN exposure duration and sleep timing (r=+0.802; p=0.001) as well as sleep duration (r=-0.552; 0=0.001). On the other hand, awareness about the health effects of LAN exposure was observed to be low (17.4%) among the respondents with staff being more aware (38.5%) than students (9.1%). Finding of the present study shows that the respondents are highly exposed to LAN, had less sleep and lower awareness of the consequences of LAN exposure.
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ISSN 2476-8316 ISBN Medium
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Call Number UP @ altintas1 @ Serial (down) 3210
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Author Feng T.; Li Z.; Li S.
Title Effects of Constant Light on the Behavioral Parameters in Rats Type Journal Article
Year 2019 Publication International Journal of Psychiatric and Mental Health Abbreviated Journal
Volume Issue Pages in press
Keywords Animals
Abstract Light pollution is one of the most rapidly increasing types of environmental degradation, especially in the hospital ward and ICUs. Exposure to constant light (LL) condition disrupts circadian rhythms in behavioral, physiological and endocrinal processes. Whether melatonin can reverse those disruptions remains unclear. We used male Sprague – Dawley rats (7 weeks of age at the time of purchase)to explore 1) the effects of LL condition on social memory, anxiety–like behavior and circadian system, 2) whether exogenous melatonin can reverse the changes. Compared with LD + Veh (LD: standard 12h:12hlight-dark cycles; Veh: receive vehicle intraperitoneal injection) group, rats exposed to LL for two weeks had less anxiety-like behavior, impaired the social memory, elongated the rhythm cycle of free running wheel and disrupted secretion of corticosterone (Cort) and melatonin (Mel). Application of exogenous melatonin couldn't rescue the impairment of the social memory and the disrupted circadian system. These findings suggest that LL condition can disorganize the circadian system and exogenous melatonin cannot reverse these changes.
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Call Number UP @ altintas1 @ Serial (down) 3209
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Author Evens, R.; Kowalczyk, C.; Norevik, G.; Ulenaers, E.; Davaasuren, B.; Bayargur, S.; Artois, T.; Akesson, S.; Hedenstrom, A.; Liechti, F.; Valcu, M.; Kempenaers, B.
Title Lunar synchronization of daily activity patterns in a crepuscular avian insectivore Type Journal Article
Year 2020 Publication Ecology and Evolution Abbreviated Journal Ecol Evol
Volume 10 Issue 14 Pages 7106-7116
Keywords Animals; Moonlight
Abstract Biological rhythms of nearly all animals on earth are synchronized with natural light and are aligned to day-and-night transitions. Here, we test the hypothesis that the lunar cycle affects the nocturnal flight activity of European Nightjars (Caprimulgus europaeus). We describe daily activity patterns of individuals from three different countries across a wide geographic area, during two discrete periods in the annual cycle. Although the sample size for two of our study sites is small, the results are clear in that on average individual flight activity was strongly correlated with both local variation in day length and with the lunar cycle. We highlight the species' sensitivity to changes in ambient light and its flexibility to respond to such changes in different parts of the world.
Address Department of Behavioural Ecology and Evolutionary Genetics Max Planck Institute for Ornithology Starnberg Germany
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Language English Summary Language Original Title
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ISSN 2045-7758 ISBN Medium
Area Expedition Conference
Notes PMID:32760515; PMCID:PMC7391349 Approved no
Call Number UP @ altintas1 @ Serial (down) 3208
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Author Mehra M.
Title Illuminating Military Installations Type Journal Article
Year 2020 Publication Society of American Military Engineers Abbreviated Journal
Volume 112 Issue 726 Pages 66-68
Keywords Lighting; Planning
Abstract Military bases must implement high security measures to ensure the safety of personnel and visitors. Lighting is a critical aspect of a base-wide security plan. Installations require high-quality, reliable lighting and real-time reporting and diagnostics so energy and security personnel know when and where luminaires are down and why, allowing them to re-establish the security perimeter more quickly. Modern installations are also concerned with conserving energy and reducing maintenance in order to decrease overall operating costs. An energy-efficient lighting system helps minimize the military’s energy footprint and decrease greenhouse gas emissions. There are, however, challenges associated with these efforts. Most bases sprawl across thousands of acres and include a range of applications that require a broad portfolio of luminaires—from roadways and intersections to security checkpoints, substations, motor pools, and office, housing, and medical buildings. They also include a mix of personnel who reside and work on base. Some military personnel and civilians arrive in the morning and leave at night. Others, including soldiers manning security checkpoints, require illumination for tasks performed after dark. In addition, many installations are located near residential areas or wildlife refuges where sky glow and light pollution must be avoided.
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Call Number UP @ altintas1 @ Serial (down) 3207
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Author Struyf P.; Enhus E.; Bauwens T.; Melgaço L.
Title Literature study: The effects of reduced public lighting on crime, fear of crime, and road safety Type Journal Article
Year 2019 Publication west-vlaanderen Abbreviated Journal
Volume Issue Pages
Keywords Safety; Security; Psychology; Review
Abstract 1. Introduction

1.1 Stating the problem: security versus climate and economic challenges

Public street lighting as a public service is often taken for granted. However, its impact on the nocturnal perception of public space should not be underestimated. It encourages people to get out, feel safe, and be safe. Indeed, Welsh and Farrington suggest that public lighting enhances social control, cohesion, and a feeling of community pride (Welsh & Farrington, 2008b). According to (Williams, 2008), this is due to the special meaning attached to the darkness of night in society. It is associated with changes in social norms and values, transgression, the release of social control, feasting, drinking, and pleasure. Meanwhile, the darkness of night generates unpredictability, uncertainty and, therefore, fear. Illuminating the night chases away these feelings; people feel reassured and safer (Schivelbusch, 1995).
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Call Number UP @ altintas1 @ Serial (down) 3206
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