| Records |
| Author |
Bará, S. |
| Title |
Variations on a classical theme: On the formal relationship between magnitudes per square arcsecond and luminance |
Type |
Journal Article |
| Year |
2017 |
Publication |
International Journal of Sustainable Lighting |
Abbreviated Journal |
Intl J of Sustainable Lighting |
| Volume |
19 |
Issue |
2 |
Pages |
77 |
| Keywords |
Instrumentation; skyglow; luminance; magnitude; sky brigthness; photometry |
| Abstract |
The formal link between magnitudes per square arcsecond and luminance is discussed in this paper. Directly related to the human visual system, luminance is defined in terms of the spectral radiance of the source, weighted by the CIE V(l) luminous efficiency function, and scaled by the 683 lm/W luminous efficacy constant. In consequence, any exact and spectrum-independent relationship between luminance and magnitudes per square arcsecond requires that the last ones be measured precisely in the CIE V(l) band. The luminance value corresponding to mVC=0 (zero-point of the CIE V(l) magnitude scale) depends on the reference source chosen for the definition of the magnitude system. Using absolute AB magnitudes, the zero point luminance of the CIE V(l) photometric band is 10.96 x 104 cd·m-2. |
| Address |
Departamento de Física Aplicada, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Galicia, Spain; salva.bara(at)usc.es |
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| Language |
English |
Summary Language |
English |
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2586-1247 |
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IDA @ john @ |
Serial |
2162 |
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| Author |
Barentine, J. |
| Title |
Who speaks for the night? The regulation of light pollution in the ‘Rights of Nature’ legal framework |
Type |
Journal Article |
| Year |
2020 |
Publication |
International Journal of Sustainable Lighting |
Abbreviated Journal |
IJSL |
| Volume |
22 |
Issue |
2 |
Pages |
28-36 |
| Keywords |
Society; Law; Rights of Nature |
| Abstract |
Efforts to control artificial light at night (ALAN) through public policies began in the late 1950s, yet light pollution continues to grow at a global average rate roughly twice that of population growth. The current global ALAN regulatory regime is clearly inadequate to solve the problem, and achieving meaningful light pollution reductions requires a new approach. This paper reviews the legal status quo, introduces the “Rights of Nature” doctrine, and advances the idea of nighttime darkness as a natural characteristic of sufficient inherent value to merit legal consideration in the Rights of Nature context. It concludes with a series of recommendations for ways forward, including the recognition of the intrinsic value of dark skies in the preambulatory language of legislation, formulating new policies in anticipation of broad adoption of Rights of Nature statutes, and advancing the significance of natural nighttime darkness in case law arguments. |
| Address |
International Dark-Sky Association, 5049 E Broadway Blvd, Suite 105 Tucson, AZ 85711-3646 USA; john ( at ) darksky ( dot ) org |
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IJSL |
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English |
Summary Language |
English |
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2586-1247 |
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no |
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IDA @ john @ |
Serial |
3258 |
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| Author |
Tauc, M.J.; Fristrup, K.M.; Repasky, K.S.; Shaw, J.A. |
| Title |
Field demonstration of a wing-beat modulation lidar for the 3D mapping of flying insects |
Type |
Journal Article |
| Year |
2019 |
Publication |
OSA Continuum |
Abbreviated Journal |
OSA Continuum |
| Volume |
2 |
Issue |
2 |
Pages |
332 |
| Keywords |
Instrumentation; Animals |
| Abstract |
We describe a wing-beat modulation lidar system designed for the 3D mapping of flying insects in ecological or entomological studies. To better understand the signals from this instrument, we analyzed simulated signals to identify how they were affected by various imperfections, such as variations in the spacing and amplitude of each individual wing-beat reflection. In addition, a radiometric model was used to estimate signal-to-noise ratio to gain insight into the relationships between the optical system design and insect parameters (e.g., wing size, reflectivity, or diffusivity). |
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2578-7519 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial |
2209 |
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| Author |
Atchoi, E.; Mitkus, M.; Rodríguez, A. |
| Title |
Is seabird light‐induced mortality explained by the visual system development? |
Type |
Journal Article |
| Year |
2020 |
Publication |
Conservation Science and Practice |
Abbreviated Journal |
Conservat Sci and Prac |
| Volume |
in press |
Issue |
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Pages |
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| Keywords |
Animals |
| Abstract |
Seabirds are impacted by coastal light pollution, leading to massive mortality events. Juveniles comprise the majority of affected individuals, while adults are only seldom grounded and reported in rescue programs. We propose a connection between visual system development of burrow nesting seabirds and the observed higher vulnerability to light pollution by a specific age group. We illustrate the need for multidisciplinary research to better understand and further mitigate light-induced mortality. |
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| ISSN |
2578-4854 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial |
2845 |
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| Author |
Pandharipande, A.; Ramasamy, S.; Anderson, J. |
| Title |
Social Impact of Connected Landmark Lighting: A Social Sensing Approach |
Type |
Journal Article |
| Year |
2020 |
Publication |
IEEE Internet of Things Magazine |
Abbreviated Journal |
IEEE Internet Things M. |
| Volume |
3 |
Issue |
1 |
Pages |
64-67 |
| Keywords |
Lighting; Society |
| Abstract |
The benefits of using light emitting diode (LED) lighting for landmarks extend beyond energy savings to the use of illumination for creating visual identity, placemaking, and increasing tourism. While measuring energy consumption is possible with metering technologies, thereby quantifying savings in energy costs, quantification of the social impact of landmark lighting is not straightforward. Measuring and monitoring social impact metrics is key to stakeholders investing in new connected LED lighting systems or upgrades of conventional lighting in order to realize the benefits of lighting that are beyond energy sustainability. We consider social sensing as an approach to quantifying social impact of landmark lighting. Using lighting at the Empire State Building and Bay Bridge as case studies, social sensing querying and data analytics aspects are presented. A number of practical lessons and technical directions for the use of social sensing in connected landmark lighting are then laid out. |
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2576-3180 |
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no |
| Call Number |
GFZ @ kyba @ |
Serial |
2881 |
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