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Author  |
Ahyar, M.; Pramudya, Y.; Okimustava, O. |
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Title |
Implementasi Sistem Pengolahan Data Sky Quality Meter Berbasis Visual Basic Untuk Analisis Perubahan Tingkat Kecerahan Langit |
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Journal Article |
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Year |
2020 |
Publication |
Jurnal Kumparan Fisika |
Abbreviated Journal |
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Volume |
3 |
Issue |
4 |
Pages |
239-246 |
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Keywords |
Skyglow |
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Abstract |
Light pollution dramatically affects the brightness of the sky. Sky brightness level can be measured using Sky Quality Meter (SQM). SQM data results are huge data. It needs an application to facilitate data processing. Microsoft Excel Visual Basic features can assist the SQM data processing. The study used observational methods of sky brightness with SQM. Data analysis using the moving average method. Software development used the waterfall model with five stages of modeling, namely: analysis, design, implementation, testing, and maintenance. The waterfall development model was able to create an SQM data processing system. The data with various columns can be selected automatically and quickly. Hence, it is able to graph the level of sky brightness versus time. |
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Indonesian |
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2655-1403 |
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UP @ altintas1 @ |
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3316 |
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Author |
Alonso, J.C.; Abril-Colón, I.; Palacín, C. |
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Title |
Moonlight triggers nocturnal display in a diurnal bird |
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Journal Article |
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Year |
2021 |
Publication |
Animal Behaviour |
Abbreviated Journal |
Animal Behaviour |
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Volume |
171 |
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87-98 |
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Keywords |
Moonlight; Animals |
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Abstract |
The importance of nocturnal display in diurnal birds has been neglected for a long time, owing to the difficulties in recording behaviour by night. Using loggers with an accelerometer (ACC) we studied nocturnal display in male African houbara bustards, Chlamydotis undulata, ssp. fuertaventurae. Diurnal display of male houbaras consists of a visual component, the display run, and an acoustic component, the boom. Nocturnal display runs were only recorded twice, both on full moon nights. Nocturnal booming intensity was highest on full moon nights when it reached similar levels to those during peak diurnal display at dawn. The more favourable physical conditions for sound transmission and the reduced acoustic competition with wind and other birds at night have been proposed to explain nocturnal vocalizing. Minimizing copulation disruptions, a frequent intramale competition mechanism in bustards, could be an additional advantage of nocturnal display. However, these factors do not explain why vocal activity is highest on full moon nights. We suggest that moonlight may help displaying males to detect predators, as well as to communicate visually with approaching females. Moonlight also allows males to combine booms with visual signals produced by the white neck feathers exposed during booming into more efficient multimodal signals. Moonlight would thus ultimately lead to males achieving nocturnal copulations, which indeed might be more frequent than previously thought, according to rates of nocturnal ACC-recorded precopulatory movements. Finally, nocturnal booming sequences had almost twice as many booms as diurnal ones, which suggests that nocturnal vocalizations transmit higher-quality information about signalling males than diurnal vocalizations. Nocturnal booming significantly increased the total display time of male houbara bustards; thus, future studies should investigate whether nocturnal vocal activity represents an important contribution to individual fitness in this and other nocturnally vocalizing diurnal species. |
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0003-3472 |
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GFZ @ kyba @ |
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3272 |
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Author |
Anand, A.; Kim, D.-H. |
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Title |
Pandemic Induced Changes in Economic Activity around African Protected Areas Captured through Night-Time Light Data |
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Journal Article |
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Year |
2021 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sensing |
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13 |
Issue |
2 |
Pages |
314 |
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Keywords |
Economics; VIIRS; night-time lights; COVID-19; pandemic; protected areas; wildlife tourism |
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The importance of tourism for development is widely recognized. Travel restrictions imposed to contain the spread of COVID-19 have brought tourism to a halt. Tourism is one of the key sectors driving change in Africa and is based exclusively on natural assets, with wildlife being the main attraction. Economic activities, therefore, are clustered around conservation and protected areas. We used night-time light data as a proxy measure for economic activity to assess change due to the pandemic. Our analysis shows that overall, 75 percent of the 8427 protected areas saw a decrease in light intensity in varying degrees in all countries and across IUCN protected area categories, including in popular protected area destinations, indicating a reduction in tourism-related economic activities. As countries discuss COVID-19 recovery, the methods using spatially explicit data illustrated in this paper can assess the extent of change, inform decision-making, and prioritize recovery efforts. |
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Independent Evaluation Office, Global Environment Facility, Washington, DC 20006, USA; aanand2 ( at ) thegef.org |
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MDPI |
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English |
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English |
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2072-4292 |
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Call Number |
IDA @ john @ |
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3390 |
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Author |
Argys, L.M.; Averett, S.L.; Yang, M. |
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Title |
Light pollution, sleep deprivation, and infant health at birth |
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Journal Article |
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Year |
2021 |
Publication |
Southern Economic Journal |
Abbreviated Journal |
South Econ J |
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87 |
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3 |
Pages |
849-888 |
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Keywords |
Human Health; birth outcomes; light pollution; skyglow; sleep deprivation |
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We conduct the first study to examine the fetal health impact of light pollution based on a direct measure of skyglow, an important aspect of light pollution. Using an empirical regularity discovered in physics (called Walker's law) as an instrumental variable, we address the potential endogeneity problem associated with the skyglow variable. We find evidence of reduced birth weight, shortened gestational length, and increases in preterm births. Specifically, increased nighttime brightness, characterized by being able to see only one‐fourth to one‐third of the stars that are visible in the natural unpolluted night sky, is associated with an increase of 1.48 percentage points in the likelihood of a preterm birth. Our study adds to the literature on the impact of early‐life exposure to pollution, which so far has focused primarily on air pollution. Our study has important policy implications regarding the necessity of minimizing skyglow that is, for example, contributed by streetlights. |
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Department of Economics, Lehigh University, 621 Taylor Street, Bethlehem, PA 18015 USA; muzheyang ( at ) lehigh.edu |
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Wiley |
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English |
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English |
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0038-4038 |
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Call Number |
IDA @ john @ |
Serial |
3300 |
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Author |
Aubé, M.; Marseille, C.; Farkouh, A.; Dufour, A.; Simoneau, A.; Zamorano, J.; Roby, J.; Tapia, C. |
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Title |
Mapping the Melatonin Suppression, Star Light and Induced Photosynthesis Indices with the LANcube |
Type |
Journal Article |
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Year |
2020 |
Publication |
Remote Sensing |
Abbreviated Journal |
Remote Sensing |
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Volume |
12 |
Issue |
23 |
Pages |
3954 |
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Keywords |
Instrumentation; artificial light at night; intrusive light; direct light pollution; radiometry; multispectral; multiangular; Melatonin Suppression Index; Star Light Index; spectroscopy; measurement; synthetic photometry |
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Abstract |
Increased exposure to artificial light at night can affect human health including disruption of melatonin production and circadian rhythms which can extend to increased risks of hormonal cancers and other serious diseases. In addition, multiple negative impacts on fauna and flora are well documented, and it is a matter of fact that artificial light at night is a nuisance for ground-based astronomy. These impacts are frequently linked to the colour of the light or more specifically to its spectral content. Artificial light at night is often mapped by using spaceborne sensors, but most of them are panchromatic and thus insensitive to the colour. In this paper, we suggest a method that allows high-resolution mapping of the artificial light at night by using ground-based measurements with the LANcube system. The newly developed device separates the light detected in four bands (Red, Green, Blue and Clear) and provides this information for six faces of a cube. We found relationships between the LANcube’s colour ratios and (1) the Melatonin Suppression Index, (2) the StarLight Index and (3) the Induced Photosynthesis Index. We show how such relationships combined with data acquisition from a LANcube positioned on the top of a car can be used to produce spectral indices maps of a whole city in a few hours. |
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Cégep de Sherbrooke, Département de Géomatique Appliquée, Université de Sherbrooke, Sherbrooke, QC J1E 4K1, Canada; martin.aube ( at ) cegepsherbrooke.qc.ca |
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MDPI |
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English |
Summary Language |
English |
Original Title |
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Series Volume |
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ISSN |
2072-4292 |
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Call Number |
IDA @ john @ |
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3304 |
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