|   | 
Details
   web
Records
Author Kocifaj, M.; Bará, S.
Title Two-index model for characterizing site-specific night sky brightness patterns Type Journal Article
Year 2019 Publication Monthly Notices of the Royal Astronomical Society Abbreviated Journal (up)
Volume 490 Issue 2 Pages 1953-1960
Keywords Skyglow
Abstract The determination of the all-sky radiance distribution produced by artificial light sources is a computationally demanding task that generally requires intensive calculations. In this paper, we develop an analytical formulation that provides the all-sky radiance distribution produced by an artificial light source as an explicit and analytical function of the observation direction, depending on two single parameters that characterize the overall effects of the atmosphere. One of these parameters is related to the effective attenuation of the light beams, whereas the other accounts for the overall asymmetry of the combined scattering processes in molecules and aerosols. Using this formulation, a wide range of all-sky radiance distributions can be efficiently and accurately calculated in a short time. This substantial reduction in the number of required parameters, in comparison with other approaches that are currently used, is expected to facilitate the development of new applications in the field of light pollution research.
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 0035-8711 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2704
Permanent link to this record
 

 
Author Hyde, E.; Frank, S.; Barentine, J. C.; Kuechly, H.; Kyba, C. C. M.
Title Testing for changes in light emissions from certified International Dark Sky Places Type Journal Article
Year 2019 Publication International Journal of Sustainable Lighting Abbreviated Journal (up)
Volume 21 Issue 1 Pages 11-19
Keywords Remote Sensing; Conservation; Policy
Abstract The International Dark-Sky Places (IDSP) program of the International Dark-Sky Association is a voluntary certification in which communities commit via legislative changes to move towards more sustainable lighting that reduces light pollution. As over 115 IDSP have now been certified, it is interesting to ask the extent to which this certification results in reduced light emissions. In this paper, we compared trends in upward light emission of 98 communities located in or near IDSP to those of 98 similarly sized communities further away from the IDSP, using a night lights observing satellite (the Visible Infrared Imaging Radiometer Suite Day-Night Band). The current dataset is not sufficient to distinguish the hypothesis that IDSP certification results in a lower rate of change in upward light emissions from the null hypothesis that IDSP certification has no impact. This result is with regard to upward light emissions only: it is possible that certification has resulted in decreases in night sky brightness that the satellite is not able to observe.
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 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number GFZ @ kyba @ Serial 2616
Permanent link to this record
 

 
Author Garstang, R. H.
Title Light Pollution at Mount Wilson and at Palomar in 1931-32 Type Journal Article
Year 2002 Publication The Observatory Abbreviated Journal (up)
Volume 122 Issue Pages
Keywords Skyglow
Abstract I present a short summary of an unpublished letter by Joel Stebbins on light pollution at Mount Wilson Observatory and on Palmar Mountain in 1931-32. I analyzed his results and show that the light emission per capita in 1932 – o was about 3*1*10^17 photons s^-1 in the blue region, equivalent to about 220 lumens per head in the visual region. These my be compared with about 1*4*10^18 photons s^-1 in the blue region and about 1000 lumens per head in the visual region for California cities in 1970.
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 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ intern @ Serial 2622
Permanent link to this record
 

 
Author Garstang, R. H.
Title Limiting visual magnitude and night sky brightness Type Journal Article
Year 2000 Publication Memorie della Società Astronomia Italiana Abbreviated Journal (up)
Volume 71 Issue Pages
Keywords Skyglow
Abstract We review the theory of visual thresholds and applications to the limiting magnitude of a telescope and of the eyes, based on Schaefers's model with minor improvements. We apply out formulation to the Yerkes Observatory refractor and to naked eye observations at Mount Wilson Observatory. We reanalyze Bowen's telescopic observations at Mount Wilson by his approximate method and by our more elaborate theory. An extension of his method leads to a determination of the night sky brightness of the visual activity of the observer is assumed to be average. Our more elaborate method allows a determination of the sky brightness, the visual acuity of the observer, and the average seeing during the observations.
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 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ intern @ Serial 2623
Permanent link to this record
 

 
Author Simons, K. S., van den Boogaard, M., & de Jager, C. P. C.
Title Impact of intensive care unit light and noise exposure on critically ill patients Type Journal Article
Year 2019 Publication Neth j crit care Abbreviated Journal (up)
Volume 27 Issue 4 Pages
Keywords Human Health; Review
Abstract Recently, the importance of the ICU environment as a potential modifiable factor for improvement of patient care has become more clear. In this review, we describe the effects of light and noise exposure on ICU patients. In ICU patients circadian rhythms and sleep are severely disturbed, which may increase the risk of delirium. Realignment of circadian rhythmicity by means of artificial light therapy has not been shown to reduce the incidence or duration of delirium. Prudent use of nighttime light may be a first step in improvement of patient sleep. Eye masks appear to improve sleep although they are only applicable for a selected group of patients. Noise levels in the ICU are above recommended standards. Negative effects include disturbances of sleep, as often encountered in ICU patients. Staff activity and talking contribute substantially to the total acoustic energy, providing opportunities to adapt behaviour and/or workflow in order to reduce noise pollution.
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 ISBN Medium
Area Expedition Conference
Notes Approved no
Call Number IDA @ intern @ Serial 2624
Permanent link to this record