toggle visibility Search & Display Options

Select All    Deselect All
 |   | 
Details
   print
  Records Links
Author Coughlin, M.; Stubbs, C.; Claver, C. url  doi
openurl 
  Title A daytime measurement of the lunar contribution to the night sky brightness in LSST’s ugrizy bands–initial results Type Journal Article
  Year 2016 Publication Experimental Astronomy Abbreviated Journal Exp Astron  
  Volume 41 Issue 3 Pages 393-408  
  Keywords Moonlight  
  Abstract (down) We report measurements from which we determine the spatial structure ofthe lunar contribution to night sky brightness, taken at the LSST site on Cerro Pachonin Chile. We use an array of six photodiodes with filters that approximate the LargeSynoptic Survey Telescope’su, g, r, i, z,andybands. We use the sun as a proxy forthe moon, and measure sky brightness as a function of zenith angle of the point onsky, zenith angle of the sun, and angular distance between the sun and the point onsky. We make a correction for the difference between the illumination spectrum of thesun and the moon. Since scattered sunlight totally dominates the daytime sky bright-ness, this technique allows us to cleanly determine the contribution to the (cloudless)night sky from backscattered moonlight, without contamination from other sourcesof night sky brightness. We estimate our uncertainty in the relative lunar night skybrightness vs. zenith and lunar angle to be between 0.3–0.7 mags depending on thepassband. This information is useful in planning the optimal execution of the LSSTsurvey, and perhaps for other astronomical observations as well. Although our pri-mary objective is to map out the angular structure and spectrum of the scattered lightfrom the atmosphere and particulates, we also make an estimate of the expected num-ber of scattered lunar photons per pixel per second in LSST, and find values that arein overall agreement with previous estimates.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0922-6435 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number GFZ @ kyba @ Serial 3039  
Permanent link to this record
 

 
Author Zamorano, J.; Sánchez de Miguel, A.; Ocaña, F.; Pila-Diez, B.; Gómez Castaño, J.; Pascual, S.; Tapia, C.; Gallego, J.; Fernandez, A.; Nievas, M. url  doi
openurl 
  Title Testing sky brightness models against radial dependency: a dense two dimensional survey around the city of Madrid, Spain Type Journal Article
  Year 2016 Publication Journal of Quantitative Spectroscopy and Radiative Transfer Abbreviated Journal JQSRT  
  Volume 181 Issue Pages 52-66  
  Keywords Skyglow; measurements; light pollution; artificial light at night; modeling; Madrid; Spain  
  Abstract (down) We present a study of the night sky brightness around the extended metropolitan area of Madrid using Sky Quality Meter (SQM) photometers. The map is the first to cover the spatial distribution of the sky brightness in the center of the Iberian peninsula. These surveys are neccessary to test the light pollution models that predict night sky brightness as a function of the location and brightness of the sources of light pollution and the scattering of light in the atmosphere. We describe the data-retrieval methodology, which includes an automated procedure to measure from a moving vehicle in order to speed up the data collection, providing a denser and wider survey than previous works with similar time frames. We compare the night sky brightness map to the nocturnal radiance measured from space by the DMSP satellite. We find that i) a single source model is not enough to explain the radial evolution of the night sky brightness, despite the predominance of Madrid in size and population, and ii) that the orography of the region should be taken into account when deriving geo-specific models from general first-principles models. We show the tight relationship between these two luminance measures. This finding sets up an alternative roadmap to extended studies over the globe that will not require the local deployment of photometers or trained personnel.  
  Address Dept. Astrof´ısica y CC. de la Atm´osfera, Universidad Complutense de Madrid, Ciudad Universitaria, 28040 Madrid, Spain  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 1323  
Permanent link to this record
 

 
Author Ayaki, M.; Hattori, A.; Maruyama, Y.; Nakano, M.; Yoshimura, M.; Kitazawa, M.; Negishi, K.; Tsubota, K. url  doi
openurl 
  Title Protective effect of blue-light shield eyewear for adults against light pollution from self-luminous devices used at night Type Journal Article
  Year 2016 Publication Chronobiology International Abbreviated Journal Chronobiol Int  
  Volume 33 Issue 1 Pages 134-139  
  Keywords Human health  
  Abstract (down) We investigated sleep quality and melatonin in 12 adults who wore blue-light shield or control eyewear 2 hours before sleep while using a self-luminous portable device, and assessed visual quality for the two eyewear types. Overnight melatonin secretion was significantly higher after using the blue-light shield (P < 0.05) than with the control eyewear. Sleep efficacy and sleep latency were significantly superior for wearers of the blue-light shield (P < 0.05 for both), and this group reported greater sleepiness during portable device use compared to those using the control eyewear. Participants rated the blue-light shield as providing acceptable visual quality.  
  Address a Department of Ophthalmology , Keio University School of Medicine , Shinjuku , Tokyo , Japan  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0742-0528 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:26730983 Approved no  
  Call Number LoNNe @ kyba @ Serial 1330  
Permanent link to this record
 

 
Author Kim, Y.J.; Park, M.S.; Lee, E.; Choi, J.W. url  doi
openurl 
  Title High Incidence of Breast Cancer in Light-Polluted Areas with Spatial Effects in Korea Type Journal Article
  Year 2016 Publication Asian Pacific Journal for Cancer Prevention Abbreviated Journal Asian Pac J Cancer Prev  
  Volume 17 Issue 1 Pages 361-367  
  Keywords Human Health; Light pollution; breast cancer; spatial analysis; intrinsic conditional autoregressive model  
  Abstract (down) We have reported a high prevalence of breast cancer in light-polluted areas in Korea. However, it is necessary to analyze the spatial effects of light polluted areas on breast cancer because light pollution levels are correlated with region proximity to central urbanized areas in studied cities. In this study, we applied a spatial regression method (an intrinsic conditional autoregressive [iCAR] model) to analyze the relationship between the incidence of breast cancer and artificial light at night (ALAN) levels in 25 regions including central city, urbanized, and rural areas. By Poisson regression analysis, there was a significant correlation between ALAN, alcohol consumption rates, and the incidence of breast cancer. We also found significant spatial effects between ALAN and the incidence of breast cancer, with an increase in the deviance information criterion (DIC) from 374.3 to 348.6 and an increase in R² from 0.574 to 0.667. Therefore, spatial analysis (an iCAR model) is more appropriate for assessing ALAN effects on breast cancer. To our knowledge, this study is the first to show spatial effects of light pollution on breast cancer, despite the limitations of an ecological study. We suggest that a decrease in ALAN could reduce breast cancer more than expected because of spatial effects.  
  Address Department of Preventive Medicine, College of Medicine, Korea University, Seoul, Korea; eunil(at)korea.ac.kr.  
  Corporate Author Thesis  
  Publisher Asian Pacific Organization for Cancer Prevention Place of Publication Korea Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 1362  
Permanent link to this record
 

 
Author Thums, M.; Whiting, S.D.; Reisser, J.; Pendoley, K.L.; Pattiaratchi, C.B.; Proietti, M.; Hetzel, Y.; Fisher, R.; Meekan, M.G. url  doi
openurl 
  Title Artificial light on water attracts turtle hatchlings during their near shore transit Type Journal Article
  Year 2016 Publication Royal Society Open Science Abbreviated Journal R. Soc. open sci.  
  Volume 3 Issue 5 Pages 160142  
  Keywords Animals; acoustic telemetry; in-water movement; VR2W positioning system; green turtle; light pollution; coastal development; Chelonia mydas; ecology; sea turtle  
  Abstract (down) We examined the effect of artificial light on the near shore trajectories of turtle hatchlings dispersing from natal beaches. Green turtle (Chelonia mydas) hatchlings were tagged with miniature acoustic transmitters and their movements tracked within an underwater array of 36 acoustic receivers placed in the near shore zone. A total of 40 hatchlings were tracked, 20 of which were subjected to artificial light during their transit of the array. At the same time, we measured current speed and direction, which were highly variable within and between experimental nights and treatments. Artificial lighting affected hatchling behaviour, with 88% of individual trajectories oriented towards the light and spending, on average, 23% more time in the 2.25&#8197;ha tracking array (19.5&#8201;±&#8201;5&#8197;min) than under ambient light conditions (15.8&#8201;±&#8201;5&#8197;min). Current speed had little to no effect on the bearing (angular direction) of the hatchling tracks when artificial light was present, but under ambient conditions it influenced the bearing of the tracks when current direction was offshore and above speeds of approximately 32.5&#8197;cm&#8197;s&#8722;1. This is the first experimental evidence that wild turtle hatchlings are attracted to artificial light after entering the ocean, a behaviour that is likely to subject them to greater risk of predation. The experimental protocol described in this study can be used to assess the effect of anthropogenic (light pollution, noise, etc.) and natural (wave action, current, wind, moonlight) influences on the in-water movements of sea turtle hatchlings during the early phase of dispersal.  
  Address Australian Institute of Marine Science c/o The UWA Oceans Institute (MO96), University of Western Australia, 35 Stirling Highway, Crawley, Western Australia 6009, Australia  
  Corporate Author Thesis  
  Publisher Royal Society Place of Publication Editor  
  Language English Summary Language English Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2054-5703 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number IDA @ john @ Serial 1454  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations:
Export Records: