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Author Bruce-White, C.; Shardlow, M.
Title (up) A Review of the Impact of Artificial Light on Invertebrates Type Journal Article
Year 2011 Publication Buglife- The Invertebrate Conservation Trust. Abbreviated Journal
Volume Issue Pages
Keywords Ecology
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Notes Approved no
Call Number LoNNe @ kagoburian @ Serial 683
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Author Kocifaj, M.
Title (up) A review of the theoretical and numerical approaches to modeling skyglow: iterative approach to RTE, MSOS, and two-stream approximation Type Journal Article
Year 2015 Publication Journal of Quantitative Spectroscopy and Radiative Transfer Abbreviated Journal Journal of Quantitative Spectroscopy and Radiative Transfer
Volume 181 Issue Pages 2-10
Keywords Skyglow
Abstract The study of diffuse light of a night sky is undergoing a renaissance due to the development of inexpensive high performance computers which can significantly reduce the time needed for accurate numerical simulations. Apart from targeted field campaigns, numerical modeling appears to be one of the most attractive and powerful approaches for predicting the diffuse light of a night sky. However, computer-aided simulation of night-sky radiances over any territory and under arbitrary conditions is a complex problem that is difficult to solve. This study addresses three concepts for modeling the artificial light propagation through a turbid stratified atmosphere. Specifically, these are two-stream approximation, iterative approach to Radiative Transfer Equation (RTE) and Method of Successive Orders of Scattering (MSOS). The principles of the methods, their strengths and weaknesses are reviewed with respect to their implications for night-light modelling in different environments.
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ISSN 0022-4073 ISBN Medium
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Notes Approved no
Call Number LoNNe @ kyba @ Serial 1295
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Author Derrien, M.M; Patricia A. Stokowski, P.A; Manning, R.E.
Title (up) A Rhetorical Analysis of National Park Service and Community Leader Discourses about Night Skies at Acadia National Park Type Journal Article
Year 2015 Publication Journal of Park and Recreation Administration Abbreviated Journal J. of Park and Rec. Admin.
Volume 33 Issue 3 Pages 32-47
Keywords Society; parks; outreach; Acadia National Park
Abstract Dark night skies are becoming increasingly scarce as human populations increase and development continues to sprawl. Light pollution, and its ecological, social, and cultural impacts are transboundary, multi-jurisdictional issues that require planning and management involving multiple actors on multiple scales. This study examines management of dark night skies at Acadia National Park, where the park and community have worked to keep the night skies relatively dark. Park service managers and community leaders were interviewed, and qualitative methods were used to better understand how each group discursively made the case for the meaning and management of dark night skies at Acadia. In addition to analyzing the explicit content of interviews, enthymemes--arguments with implicit claims--were also evaluated. The rhetorical analysis also focused on the stylistic techniques that supported enthymematic claims; these included establishing legitimacy and credibility, positioning leaders relative to others, and ambiguity. This study showed that NPS arguments tended to frame the role of the community as “buying in” to NPS's efforts to uphold its new night sky-inclusive management policies, while community leaders argued that the night sky was an economic asset, discursively retaining their autonomous interests. Rhetorical discourses functioned to forge the semblance of agreement and the appearance of a “win-win” situation for both groups, even though the underlying premises of their arguments were often and the goals of its management. Other research has found that contested case, contested meanings seemed to represent a case of adjustment and shared responsibility.
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Publisher Sagamore Place of Publication Editor
Language English Summary Language English Original Title
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Call Number IDA @ john @ Serial 1276
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Author Kocifaj, M.; Kómar, L.
Title (up) A role of aerosol particles in forming urban skyglow and skyglow from distant cities Type Journal Article
Year 2016 Publication Monthly Notices of the Royal Astronomical Society Abbreviated Journal MNRAS
Volume 458 Issue 1 Pages 438-448
Keywords Skyglow; scattering; atmospheric effects; artificial light; numerical modeling; GIS-based modeling; light pollution
Abstract Aerosol particles may represent the largest uncertainty about skyglow change in many locations under clear sky conditions. This is because aerosols are ubiquitous in the atmosphere and influence the ground-reaching radiation in different ways depending on their concentrations, origins, shapes, sizes, and compositions. Large particles tend to scatter in Fraunhofer diffraction regime, while small particles can be treated in terms of Rayleigh formalism. However, the role of particle microphysics in forming the skyglow still remains poorly quantified. We have shown in this paper that the chemistry is somehow important for backscattering from large particles that otherwise work as efficient attenuators of light pollution if composed of absorbing materials. The contribution of large particles to the urban skyglow diminishes as they become more spherical in shape. The intensity of backscattering from non-absorbing particles is more-or-less linearly decreasing function of particle radius even if number size distribution is inversely proportional to the fourth power of particle radius. This is due to single particle backscattering that generally increases steeply as the particle radius approaches large values. Forward scattering depends on the particle shape but is independent of the material composition, thus allowing for a simplistic analytical model of skyglow from distant cities. The model we have developed is based on mean value theorem for integrals and incorporates the parametrizable Garstang's emission pattern, intensity decay along optical beam path, and near-forward scattering in an atmospheric environment. Such model can be used by modellers and experimentalists for rapid estimation of skyglow from distant light sources.
Address ICA, Slovak Academy of Sciences, Dúbravská Road 9, 845 03 Bratislava, Slovak Republic; kocifaj(at)savba.sk
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Publisher Oxford Journals Place of Publication Editor
Language English Summary Language English Original Title
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Notes Approved no
Call Number IDA @ john @ Serial 1361
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Author Christie, S.; Vincent, A.D.; Li, H.; Frisby, C.L.; Kentish, S.J.; O'Rielly, R.; Wittert, G.A.; Page, A.J.
Title (up) A rotating light cycle promotes weight gain and hepatic lipid storage in mice Type Journal Article
Year 2018 Publication American Journal of Physiology. Gastrointestinal and Liver Physiology Abbreviated Journal Am J Physiol Gastrointest Liver Physiol
Volume in press Issue Pages
Keywords Animals
Abstract Processes involved in regulation of energy balance and intermediary metabolism are aligned to the light-dark cycle. Shift-work and high fat diet (HFD)-induced obesity disrupt circadian rhythmicity and are associated with increased risk of non-alcoholic fatty liver disease (NAFLD). This study aimed to determine the effect of simulating shift work on hepatic lipid accumulation in lean and HFD-mice. C57BL/6 mice fed a standard laboratory diet (SLD) or HFD for 4wks were further allocated to a normal light (NL)-cycle (lights on:0600-1800hr) or rotating light (RL)-cycle (3-days NL and 4-days reversed (lights on:1800-0600hr) repeated) for 8wks. Tissue was collected every 3hrs beginning at 0600hr. HFD-mice gained more weight than SLD-mice, and RL-mice gained more weight than NL-mice. SLD-NL and HFD-NL mice, but not RL-mice, were more active, had higher respiratory quotients and consumed/expended more energy during the dark phase compared to the light phase. Blood glucose and plasma cholesterol and triglyceride concentrations were elevated in HFD and SLD-RL compared to SLD-NL mice. Hepatic glycogen was elevated in HFD compared to SLD-mice. Hepatic triglycerides were elevated in SLD-RL and HFD-mice compared to SLD-NL. Circadian rhythmicity of hepatic acetyl-CoA carboxylase (ACACA) mRNA was phase shifted in SLD-RL and HFD-NL and lost in HFD-RL mice. Hepatic ACACA protein was reduced in SLD-RL and HFD-mice compared to SLD-NL mice. Hepatic adipose triglyceride lipase was elevated in HFD-NL compared to SLD-NL but lower in RL-mice compared to NL-mice irrespective of diet. -Conclusion: A RL-cycle model of shift-work promotes weight gain and hepatic lipid storage even in lean conditions.
Address Adelaide Medical School, University of Adelaide, Australia
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Language English Summary Language Original Title
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ISSN 0193-1857 ISBN Medium
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Notes PMID:30188750 Approved no
Call Number GFZ @ kyba @ Serial 2123
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