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Author Bedrosian, T.A.; Weil, Z.M.; Nelson, R.J. url  doi
openurl 
  Title Chronic dim light at night provokes reversible depression-like phenotype: possible role for TNF Type Journal Article
  Year 2013 Publication Molecular Psychiatry Abbreviated Journal  
  Volume 18 Issue Pages 930-936  
  Keywords Animals  
  Abstract The prevalence of major depression has increased in recent decades and women are twice as likely as men to develop the disorder. Recent environmental changes almost certainly have a role in this phenomenon, but a complete set of contributors remains unspecified. Exposure to artificial light at night (LAN) has surged in prevalence during the past 50 years, coinciding with rising rates of depression. Chronic exposure to LAN is linked to increased risk of breast cancer, obesity and mood disorders, although the relationship to mood is not well characterized. In this study, we investigated the effects of chronic exposure to 5 lux LAN on depression-like behaviors in female hamsters. Using this model, we also characterized hippocampal brain-derived neurotrophic factor expression and hippocampal dendritic morphology, and investigated the reversibility of these changes 1, 2 or 4 weeks following elimination of LAN. Furthermore, we explored the mechanism of action, focusing on hippocampal proinflammatory cytokines given their dual role in synaptic plasticity and the pathogenesis of depression. Using reverse transcription-quantitative PCR, we identified a reversible increase in hippocampal tumor necrosis factor (TNF), but not interleukin-1β, mRNA expression in hamsters exposed to LAN. Direct intracerebroventricular infusion of a dominant-negative inhibitor of soluble TNF, XPro1595, prevented the development of depression-like behavior under LAN, but had no effect on dendritic spine density in the hippocampus. These results indicate a partial role for TNF in the reversible depression-like phenotype observed under chronic dim LAN. Recent environmental changes, such as LAN exposure, may warrant more attention as possible contributors to rising rates of mood disorders.  
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  Call Number LoNNe @ christopher.kyba @ Serial 386  
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Author Snyder, J.D.; Bullough, J.D.; Radetsky, L.C. url  openurl
  Title Innovative Roadway Light Source and Dye Combinations to Improve Visibility and Reduce Environmental Impacts. Type Journal Article
  Year 2013 Publication National Technical Information Service report Abbreviated Journal  
  Volume Issue Pages  
  Keywords Lighting Systems  
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  Call Number LoNNe @ christopher.kyba @ Serial 444  
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Author Zhou, H.; Hawkins, H.G.; Miles, J.D. url  openurl
  Title Guidelines for Freeway Lighting Curfews Type Journal Article
  Year 2013 Publication Technical Report No. FHWA/TX-13/0-6645-1, Texas A&M Transportation Institute Abbreviated Journal  
  Volume Issue Pages á-72  
  Keywords Lighting Systems; Regulation  
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  Notes Approved no  
  Call Number LoNNe @ christopher.kyba @ Serial 445  
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Author Kyba, C.C.M.; Ruhtz, T.; Lindemann, C.; Fischer, J.; Hölker, F. url  openurl
  Title Two camera system for measurement of urban uplight angular distribution Type Journal Article
  Year 2013 Publication AIP Conf. Proc Abbreviated Journal  
  Volume 1531 Issue 568 Pages  
  Keywords Instrumentiation  
  Abstract The angular distribution function of light emitted from cities is unknown, and represents the most important systematic error in skyglow simulations. We describe a method for measuring this distribution using a two camera system mounted on an aerial platform. We present preliminary results from a test flight using such a system, taken over the city of Berlin on July 14, 2011.  
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  Call Number LoNNe @ christopher.kyba @ Serial 467  
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Author Duriscoe, D.M. url  openurl
  Title Measuring Anthropogenic Sky Glow Using a Natural Sky Brightness Model. Type Journal Article
  Year 2013 Publication Publications of the Astronomical Society of the Pacific Abbreviated Journal  
  Volume 125 Issue 933 Pages 1370-1382  
  Keywords Skyglow  
  Abstract Anthropogenic sky glow (a result of light pollution) combines with the natural background brightness of the night sky when viewed by an observer on the earth’s surface. In order to measure the anthropogenic component accurately, the natural component must be identified and subtracted. A model of the moonless natural sky brightness in the V-band was constructed from existing data on the Zodiacal Light, an airglow model based on the van Rhijn function, and a model of integrated starlight (including diffuse galactic light) constructed from images made with the same equipment used for sky brightness observations. The model also incorporates effective extinction by the atmosphere and is improved at high zenith angles (>80°) by the addition of atmospheric diffuse light. The model may be projected onto local horizon coordinates for a given observation at a resolution of 0.05° over the hemisphere of the sky, allowing it to be accurately registered with data images obtained from any site. Zodiacal Light and integrated starlight models compare favorably with observations from remote dark sky sites, matching within ± 8 nL over 95% of the sky. The natural airglow may be only approximately modeled, errors of up to ± 25 nL are seen when the airglow is rapidly changing or has considerable character (banding); ± 8 nL precision may be expected under favorable conditions. When subtracted from all-sky brightness data images, the model significantly improves estimates of sky glow from anthropogenic sources, especially at sites that experience slight to moderate light pollution.  
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  Notes Approved no  
  Call Number LoNNe @ christopher.kyba @ Serial 539  
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