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Author Rahman, A.; Asyhari, A.T.; Obaidat, M.S.; Kurniawan, I.F.; Mukta, M.Y.; Vijayakumar, P.
Title IoT-Enabled Light Intensity-Controlled Seamless Highway Lighting System Type Journal Article
Year 2020 Publication IEEE Systems Journal Abbreviated Journal
Volume (up) in press Issue Pages in press
Keywords Lighting; Economics
Abstract Motivated by enormous highway-lighting energy consumption, smart lighting development is crucial to better manage available resources. While existing literature focused on ensuring cost-effective lighting, an equally important requirement, namely the visual comfort of motorists, is almost disregarded. This article proposes a novel Internet of Things-enabled system that can be intelligently controlled according to the traffic demand. Cooperative relay-network architecture is the central element that leverages upon placement of cyber-enabled lampposts to allow for sensing-exchanging highway traffic information. Data accumulation is exploited to automate adaptive switching on/off the lighting and provide backtracking detection of faulty lampposts. From the service provider’s perspective, we envision to deploy low-cost highly durable sensing and network components to significantly cut down the operating cost. From the road user’s perspective, the relay-network is envisaged to provide seamless driving experience where sufficient lighting is always perceived along the road. A critical analysis quantitatively evaluates the seamless driving experience considering car arrival rate, outage probability, and device malfunction probability. A road occupancy-based cost estimation analysis demonstrates the effective cost reduction of the proposal compared to existing systems. Furthermore, the performance of chosen communication modules under different setups is assessed through simulation, suggesting appropriate protocol for different highway traffic conditions.
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Call Number GFZ @ kyba @ Serial 2897
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Author Gerhardsson, K.M.; Laike, T.; Johansson, M.
Title Leaving lights on – A conscious choice or wasted light? Use of indoor lighting in Swedish homes Type Journal Article
Year 2020 Publication Indoor and Built Environment Abbreviated Journal
Volume (up) in press Issue Pages in press
Keywords Psychology; Lighting
Abstract Promoting resource- and energy-efficient home lighting through technology and behaviour change requires an understanding of how residents currently use lighting and what they want from it. However, users' needs and desires relating to lighting in homes are poorly understood, as research is still limited. This paper aims to provide a fuller picture of residents' experiences with their home lighting. Interviews about how residents perceive the character of lighting and luminaires and lighting use suggest that home lighting has nine capabilities: to enable vision; to facilitate visual tasks; to display objects; to send a message; to support a particular atmosphere; to shape the architectural space; to offer a visual aesthetic experience; to maintain or change rhythmicity; and to evoke memories. Secondary data confirmed five of them. The identified capabilities relate to behavioural goals, psychological wellbeing and social needs. We conclude that seemingly wasted light in people's homes, i.e. lights left on in unoccupied rooms, can serve a purpose for the residents, such as avoiding visual or aesthetic discomfort, making the home inviting, benefitting people outside and providing safety. Findings have implications for the further development of new lighting technologies and design, energy-saving campaigns targeting residents and for urban outdoor environments.
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2898
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Author Hassan, M.; El‑Taieb, M.; Fares, N.; Fayed, H.; Toghan, R.; Ibrahim, H.
Title Men with idiopathic oligoasthenoteratozoospermia exhibit lower serum and seminal plasma melatonin levels: Comparative effect of night‑light exposure with fertile males Type Journal Article
Year 2020 Publication Experimental and Therapeutic Medicine Abbreviated Journal Exp Ther Med
Volume (up) in press Issue Pages in press
Keywords Human Health
Abstract Melatonin is a darkness hormone secreted by the pineal gland, which serves a role in idiopathic oligoasthenoteratozoospermia (iOAT). The present study aimed to evaluate the seminal plasma and serum melatonin levels of 50 patients with iOAT and 50 normal fertile controls and the effects of exposure to light at night on semen parameters. Semen analyses were performed according to the World Health Organization 2010 guidelines. Measurements of serum and seminal plasma melatonin, serum TSH, FT3, FT4, free testosterone, prolactin, FSH and LH were performed using ELISA. The overall results revealed that the serum and seminal plasma levels of melatonin were lower in patients with iOAT compared with the control subjects (P=0.0004 and 0.01, respectively). Patients with iOAT who were exposed to light at night exhibited lower serum and seminal plasma melatonin levels compared with those who were not exposed to light at night (P<0.0001 and 0.02, respectively). Additionally, similar significant differences were identified in control subjects exposed to light at night when compared to non‑exposed controls. There was a significantly positive correlation between serum melatonin levels and sperm motility in the entire iOAT patient cohort (r=0.614; P<0.0001) and a significantly positive correlation between the serum and seminal plasma melatonin levels in the non‑exposed iOAT patient subgroup (r=0.753; P<0.001). Thus, darkness and sleep at night may improve the semen parameters of patients with iOAT, as evidenced by the effects of light exposure at night on the serum and seminal plasma levels of melatonin and, consequently, on semen parameters.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN 1792-0981 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2907
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Author Willett, M.
Title Colonising the Ancient Night? Functions of the Night-Time in Ancient Greek Warfare. Type Manuscript
Year 2019 Publication Leiden University Abbreviated Journal
Volume (up) Issue Pages
Keywords Society; warfare; night; ancient world; classics
Abstract In this thesis, I will explore, on an intellectual and sensory level, the ways in which the night time was perceived and utilised in the context of ancient Greek warfare. By ascertaining what activities took place during the night time of the 4th century BC, in a military context, it will become possible to understand more about how the experience of the night was used and presented in antiquity. I will argue that far from being desolate and empty of human presence, the ancient night was a significant time for military activity and that it was in fact used in a variety of interesting ways that are not served by the rather simplistic image of nocturnal ‘colonisation’ presented in Histories of the Early Modern period.
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Corporate Author Thesis Master's thesis
Publisher Leiden University Place of Publication Editor
Language English Summary Language English Original Title
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Notes Approved no
Call Number IDA @ john @ Serial 2908
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Author Lai, K.Y.; Sarkar, C.; Ni, M.Y.; Gallacher, J.; Webster, C.
Title Exposure to light at night (LAN) and risk of obesity: a systematic review and meta-analysis of observational studies Type Journal Article
Year 2020 Publication Environmental Research Abbreviated Journal Environmental Research
Volume (up) in press Issue Pages in press
Keywords Human Health
Abstract Background

There is emerging evidence of the association between light at night (LAN) exposure and weight gain.

Objective

We aim to conduct a systematic review and meta-analysis of observational studies on the association between LAN exposure and risk of obesity in human subjects.

Methods

Peer-reviewed observational studies were systematically searched from MEDLINE (EBSCO), Academic Search Complete (EBSCO), CINAHL Plus (EBSCO) and PubMed up to 24 December 2019. Random-effects models were developed to estimate the associations between LAN exposure and weight-related outcomes of overweight and obesity as measured by body mass index (BMI), waist circumference, waist-hip-ratio and waist-to-height-ratio. The I2 statistic was used to assess the degree of heterogeneity across studies. The National Toxicology Program’s Office of Health Assessment and Translation (OHAT) risk of bias rating tool and the Grading of Recommendations Assessment, Development and Evaluation (GRADE) guideline were respectively employed to assess the risk of bias and to appraise the quality of the generated evidence.

Results

A total of 12 studies (three with longitudinal and nine of cross-sectional design) published between 2003-2019 were included for systematic review, while seven of them fulfilling the inclusion/exclusion criteria were included in the meta-analysis. A higher LAN exposure was significantly associated with 13% higher odds of overweight (BMI≥25 kg/m2) (Summary Odds Ratio; SOR: 1.13, 95% CI: 1.10-1.16) with low heterogeneity (I2 = 27.27%), and 22% higher odds of obesity (BMI≥30 kg/m2) (SOR: 1.22, 95% CI: 1.07-1.38) with substantial heterogeneity (I2 = 85.96%). Stratifying analyses by the levels of measurement of LAN exposures (macro-, meso- and micro-levels) and time of LAN measurement (including before and while sleeping) consistently produced robust estimates, with higher exposure to LAN being positively associated with poorer weight outcomes. Assessment of risk of bias identified substantial detection bias for exposure, with over half of the pooled studies employing subjective LAN measures. The overall evidence of the association between LAN exposure and risk of obesity was rated as ‘moderate’ as per the GRADE guideline.

Conclusions

Exposure to LAN was reported to be a significant risk factor for overweight and obesity. Prospectively designed future studies with objectively measured multi-level LAN exposures and weight outcomes are required.
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Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
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ISSN 0013-9351 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2916
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