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Author Rea, M.; Skinner, N.; Bullough, J.
Title (up) A Novel Barricade Warning Light System Using Wireless Communications Type Journal Article
Year 2018 Publication SAE Technical Paper 2018-01-5036 Abbreviated Journal
Volume In press Issue Pages
Keywords Lighting; Safety
Abstract Workers in construction and transportation sectors are at increased risk for work-related injuries and fatalities by nearby traffic. Barricade-mounted warning lights meeting current specifications do not always provide consistent and adequate visual guidance to drivers and can contribute to glare and reduced safety. Through an implementation of sensors and wireless communications, a novel, intelligent set of warning lights and a tablet-based interface were developed. The lights modulate between 100% and 10% of maximum intensity rather than between 100% and off in order to improve visual guidance and adjust their overall intensity based on ambient conditions. The lights can be synchronized or operated in sequential flash patterns at any frequency between 1 and 4 Hz, and sequential patterns automatically update based on global positioning satellite (GPS) locations displayed in the control interface. A successful field demonstration of the system verified that its functions were viewed favorably by transportation safety personnel.
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Call Number NC @ ehyde3 @ Serial 2117
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Author Hu, T.; Huang, X.
Title (up) A novel locally adaptive method for modeling the spatiotemporal dynamics of global electric power consumption based on DMSP-OLS nighttime stable light data Type Journal Article
Year 2019 Publication Applied Energy Abbreviated Journal Applied Energy
Volume 240 Issue Pages 778-792
Keywords Remote Sensing
Abstract Timely and reliable estimation of electricity power consumption (EPC) is essential to the rational deployment of electricity power resources. Nighttime stable light (NSL) data from the Defense Meteorological Satellite Program Operational Linescan System (DMSP-OLS) have the potential to model global 1-km gridded EPC. A processing chain to estimate EPC includes: (1) NSL data correction; and (2) regression model between EPC statistics and NSL data. For the global gridded EPC estimation, the current approach is to correct the global NSL image in a uniform manner and establish the linear relationships between NSL and EPC. However, the impacts of local socioeconomic inconsistencies on the NSL correction and model establishment are not fully considered. Therefore, in this paper, we propose a novel locally adaptive method for global EPC estimation. Firstly, we set up two options (with or without the correction) for each local area considering the global NSL image is not saturated everywhere. Secondly, three directions (forward, backward, or average) are alternatives for the inter-annual correction to remove the discontinuity effect of NSL data. Thirdly, four optional models (linear, logarithmic, exponential, or second-order polynomial) are adopted for the EPC estimation of each local area with different socioeconomic dynamic. Finally, the options for each step constitute all candidate processing chains, from which the optimal one is adaptively chosen for each local area based on the coefficient of determination. The results demonstrate that our product outperforms the existing one, at global, continental, and national scales. Particularly, the proportion of countries/districts with a high accuracy (MARE (mean of the absolute relative error)  ≤ 10%) increases from 17.8% to 57.8% and the percentage of countries/districts with inaccurate results (MARE > 50%) decreases sharply from 23.0% to 3.7%. This product can enhance the detailed understanding of the spatiotemporal dynamics of global EPC.
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ISSN 0306-2619 ISBN Medium
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Call Number GFZ @ kyba @ Serial 2242
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Author Rayleigh, L.
Title (up) A Photoelectric Method of Measuring the Light of the Night Sky with Studies of the Course of Variation through the Night Type Journal Article
Year 1929 Publication Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences Abbreviated Journal Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume 124 Issue 794 Pages 395-408
Keywords Instrumentation; Night Sky Brightness
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ISSN 1364-5021 ISBN Medium
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Notes Approved no
Call Number GFZ @ kyba @ Serial 2396
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Author Elvey, C.T.; Roach, F.E.
Title (up) A Photoelectric Study of the Light from the Night Sky Type Journal Article
Year 1937 Publication The Astrophysical Journal Abbreviated Journal ApJL
Volume 85 Issue Pages 213
Keywords Instrumentation; Sky Brightness
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ISSN 0004-637X ISBN Medium
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Call Number GFZ @ kyba @ Serial 2399
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Author Ashford, O.M.
Title (up) A portable cloud searchlight Type Journal Article
Year 1947 Publication Weather Abbreviated Journal
Volume 2 Issue Pages 103-104
Keywords Remote Sensing
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Call Number GFZ @ kyba @ Serial 2044
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