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Raynham, P.; Saksvikronning, T. |
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Title |
White Light and Facial Recognition |
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Journal Article |
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2003 |
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The Lighting Journal |
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68 |
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1 |
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Society; Lighting |
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LoNNe @ kagoburian @ |
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1056 |
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Lin, Y.; Liu, Y.; Sun, Y.; Zhu, X.; Lai, J.; Heynderickx, I. |
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Title |
Model predicting discomfort glare caused by LED road lights |
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Journal Article |
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2014 |
Publication |
Optics Express |
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Opt. Express |
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22 |
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15 |
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18056 |
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Keywords |
LED; LED lighting; glare; road safety; traffic |
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Abstract |
To model discomfort glare from LED road lighting, the effect of four key variables on perceived glare was explored. These variables were: the average glare source luminance (Lg), the background luminance (Lb), the solid angle of the glare source from the perspective of the viewer; and the angle between the glare source and the line of sight. Based on these four variables 72 different light conditions were simulated in a scaled experimental set-up. Participants were requested to judge the perceived discomfort glare of these light conditions using the deBoer rating scale. All four variables and some of their interactions had indeed a significant effect on the deBoer rating. Based on these findings, we developed a model, and tested its general applicability in various verification experiments, including laboratory conditions as well as real road conditions. This verification proved the validity of the model with a correlation between measured and predicted values as high as 0.87 and a residual deviation of about 1 unit on the deBoer rating scale. These results filled the gap in estimating discomfort glare of LED road lighting and clarified similarities of and differences in discomfort glare between LED and traditional light sources. |
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1094-4087 |
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IDA @ john @ |
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351 |
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Gaston, K.J.; Bennie, J. |
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Title |
Demographic effects of artificial nighttime lighting on animal populations |
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Book Chapter |
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Year |
2014 |
Publication |
Environmental Reviews |
Abbreviated Journal |
Environ. Rev. |
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22 |
Issue |
4 |
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323-330 |
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Keywords |
diurnal; lighting; night; nocturnal; light pollution; light at night; Photoperiodism; demography; demographics; population dynamics |
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Artificial lighting, especially but not exclusively through street lights, has transformed the nighttime environment in much of the world. Impacts have been identified across multiple levels of biological organization and process. The influences, however, on population dynamics, particularly through the combined effects on the key demographic rates (immigration, births, deaths, emigration) that determine where individual species occur and in what numbers, have not previously been well characterized. The majority of attention explicitly on demographic parameters to date has been placed on the attraction of organisms to lights, and thus effectively local immigration, the large numbers of individuals that can be involved, and then to some extent the mortality that can often result. Some of the most important influences of nighttime lighting, however, are likely more subtle and less immediately apparent to the human observer. Particularly significant are effects of nighttime lighting on demography that act through (i) circadian clocks and photoperiodism and thence on birth rates; (ii) time partitioning and thence on death rates; and (iii) immigration/emigration through constraining the movements of individuals amongst habitat networks, especially as a consequence of continuously lit linear features such as roads and footpaths. Good model organisms are required to enable the relative consequences of such effects to be effectively determined, and a wider consideration of the effects of artificial light at night is needed in demographic studies across a range of species. |
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Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall TR10 9EZ, UK |
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Canadian Science Publishing |
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1181-8700 |
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IDA @ john @ |
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317 |
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Owen, D. |
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Title |
The Dark Side. Making war on light pollution |
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2007 |
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The New Yorker |
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Lighting |
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LoNNe @ kagoburian @ |
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791 |
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Hong, Y.; Lee, S.; Choi, J.; Jin, Y.; Won, J.; Hong, Y. |
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Title |
Conditional Controlled Light/Dark Cycle Influences Exercise-Induced Benefits in a Rat Model with Osteoarthritis: In Vitro and In Vivo Study |
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2019 |
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Journal of Clinical Medicine |
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J Clin Med |
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8 |
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11 |
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1855 |
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Keywords |
Animals; environmental lighting; inflammation; musculoskeletal homeostasis; physical exercise |
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Physical exercise has long been recommended as a treatment for osteoarthritis (OA), though its effects vary based on the exercise protocol. Here, we examined whether environmental lighting conditions influence the anti-inflammatory benefits of exercise in a rat model of OA. Moderate-intensity treadmill exercise (Ex) was performed for six weeks under a 12:12 h light/dark (L/D) cycle, and compared against rats housed in a 24 h continuous light (L/L) environment. L/L conditions were associated with serological changes shortly after OA induction, which exacerbated the inflammatory microenvironment in the joint. Differentiation capacity was also impaired in bone precursor cells isolated from normal rats maintained under L/L conditions, despite elevated inflammatory responses. Exercise training under L/L conditions led to increased corticosterone levels in the blood, which exacerbated the progression of cartilaginous and synovial lesions. Osteoporotic phenomena were also observed in exercise-trained rats maintained under L/L conditions, along with inflammation-induced catabolism in the gastrocnemius muscle. Aberrant light/dark cycle conditions were also found to be associated with suppression of splenic Cry1 expression in exercise-trained rats, leading to dysregulation of immune responses. Taken together, these data suggest that lighting condition may be an important environmental factor influencing the exercise-induced benefits on OA. |
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Department of Medicine, Division of Hematology/Oncology, Harvard Medical SchoolBeth Israel, Deaconess Medical Center, Boston, MA 02215, USA. yonghong@inje.ac.kr |
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2077-0383 |
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PMID:31684092 |
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GFZ @ kyba @ |
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2729 |
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