| Records |
| Author |
Sutton, P.; Roberts, D.; Elvidge, C.; Meij, H. |
Title  |
A comparison of nighttime satellite imagery and population density for the continental United States. |
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Journal Article |
| Year |
1997 |
Publication |
Photogrammetric Engineering and Remote Sensing |
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| Volume |
63 |
Issue |
11 |
Pages |
1303–1313 |
| Keywords |
Remote Sensing |
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LoNNe @ kagoburian @ |
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974 |
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| Author |
Ge, A.; Du, Z.; Wang, W.; Qiu, P.; Wang, J.; Cai, J.; Song, X. |
| Title |
A composite optical system for a LED based headlamp low beam module |
Type |
Journal Article |
| Year |
2013 |
Publication |
Lighting Research and Technology |
Abbreviated Journal |
Lighting Research and Technology |
| Volume |
45 |
Issue |
6 |
Pages |
752-757 |
| Keywords |
Lighting |
| Abstract |
In this paper, we propose a composite optical system for automotive headlamps. The system is composed of a paraboloid collimating reflector, an off-axis paraboloid reflector, a baffle and an imaging len. By using a LED as the light source, precise light distribution can be achieved. When making ray-tracing simulation for the composite optical system in TracePro, a clear cut-off line can be seen on the measuring screen, as well as a hotspot at the centre. The power consumption for the LED light sources in this system is less than 10 W, resulting in an energy efficiency of more than 58% and a maximum illumination of 26.76 lux at the centre hotspot. |
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1477-1535 |
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LoNNe @ kagoburian @ |
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632 |
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Hurley, S.; Nelson, D.O.; Garcia, E.; Gunier, R.; Hertz, A.; Reynolds, P. |
| Title |
A cross-sectional analysis of light at night, neighborhood sociodemographics and urinary 6-sulfatoxymelatonin concentrations: implications for the conduct of health studies |
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Journal Article |
| Year |
2013 |
Publication |
International Journal of Health Geographics |
Abbreviated Journal |
Int J Health Geogr |
| Volume |
12 |
Issue |
1 |
Pages |
39 |
| Keywords |
circadian disruption; 6-sulftoxymelatonin; melatonin; aMT6s, DMSP; light at night |
| Abstract |
BACKGROUND: There is accumulating evidence that circadian disruption, mediated by alterations in melatonin levels, may play an etiologic role in a wide variety of diseases. The degree to which light-at-night (LAN) and other factors can alter melatonin levels is not well-documented. Our primary objective was to evaluate the degree to which estimates of outdoor environmental LAN predict 6-sulftoxymelatonin (aMT6s), the primary urinary metabolite of melatonin. We also evaluated other potential behavioral, sociodemographic, and anthropomorphic predictors of aMT6s. METHODS: Study participants consisted of 303 members of the California Teachers Study who provided a 24-hour urine specimen and completed a self-administered questionnaire in 2000. Urinary aMT6s was measured using the Buhlmann ELISA. Outdoor LAN levels were estimated from satellite imagery data obtained from the U.S. Defense Meteorological Satellite Program's (DMSP) Operational Linescan System and assigned to study participants' geocoded residential address. Information on other potential predictors of aMT6s was derived from self-administered surveys. Neighborhood socioeconomic status (SES) was based on U.S. Census block group data. RESULTS: Lower aMT6s levels were significantly associated with older age, shorter nights, and residential locations in lower SES neighborhoods. Outdoor sources of LAN estimated using low-dynamic range DMSP data had insufficient variability across urban neighborhoods to evaluate. While high-dynamic range DMSP offered much better variability, it was not significantly associated with urinary aMT6s. CONCLUSIONS: Future health studies should utilize the high-dynamic range DMSP data and should consider other potential sources of circadian disruption associated with living in lower SES neighborhoods. |
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1476-072X |
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PMID:24127816; PMCID:PMC3766028 |
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IDA @ john @ |
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142 |
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| Author |
Smalling, R.; Enright, J. |
| Title |
A Crusade on HSP Amber High Mast Yields Green with Plasma |
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Journal Article |
| Year |
2015 |
Publication |
Energy |
Abbreviated Journal |
Energy Engr. |
| Volume |
112 |
Issue |
5 |
Pages |
12-17 |
| Keywords |
Lighting; Energy; lighting technology; light-emitting plasma; lighting transition; LEP; Washington |
| Abstract |
Naval Facilities Engineering Command Northwest (NAVFAC NW) Public Works Department (PWD) Everett recently completed a lighting replacement project at Naval Station (NS) Everett, Washington, utilizing a utility energy service contract (UESC) with Bonneville Power Administration (BPA). The project replaced 74 high pressure sodium (HPS) light fixtures with modern energy saving, light-emitting plasma (LEP) fixtures atop 80-foot light poles along the piers and wharf at NS Everett. The no-glare LEP bulbs last twice as long while using less than half the power of their HPS predecessors. This project was completed at a cost of $160,000 and will result in cost avoidances in annual operating and maintenance of over $16,000, with a payback under 10 years. This UESC-financed and executed project saves one percent of the total shore energy consumption cost. Through similar efficiency projects and energy conservation efforts, NS Everett has reduced power usage by 16 percent in the past year and 40 percent since 2003. |
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2000 West Marine View Drive, Bldg 2000, Rm 242 Everett, WA 98207 |
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Taylor & Francis |
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English |
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English |
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IDA @ john @ |
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1219 |
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Richter, A.; Ng, K.T.W.; Karimi, N. |
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A data driven technique applying GIS, and remote sensing to rank locations for waste disposal site expansion |
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Journal Article |
| Year |
2019 |
Publication |
Resources, Conservation and Recycling |
Abbreviated Journal |
Resources, Conservation and Recycling |
| Volume |
149 |
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352-362 |
| Keywords |
Remote Sensing |
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Landfilling is the most common method for final treatment of municipal solid waste worldwide. Canadians generated 973 kg/cap of waste in 2016, and 73% of that was sent to landfills or incinerators. This study proposes a novel method which combines remote sensing and vector data to rank the suitability of current landfill sites and their area of influence for expansion in Saskatchewan, Canada; where there are currently more than 500 active landfills. This study found that using average normalized data, 55.3% of the land in the study area was suitable or moderately suitable for landfill expansion while 45% of the area was unsuitable for landfill expansion. Polygon 32, an area dominated by agriculture and pasture land, is the most suitable for landfill expansion based on the mean normalized rank and was ranked 9th (out of 39) in terms of standard deviation. Polygon 27 is the least suitable for landfill expansion, having the largest mean normalized rank, and was ranked 38th (out of 39) in terms of standard deviation. This method is advantageous compared to other decision-making tools which rely on expert opinion. This method relies solely on remote sensing and vector data; but is flexible enough that weighting of data sets can be applied by policy makers if so desired. Results show that using remote sensing data and vector data together are capable of capturing distinctly different aspects of the study area, and that vector data can be used as a proxy for imagery where cloud cover is present. |
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0921-3449 |
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GFZ @ kyba @ |
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2582 |
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