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| Author |
Andre, J.; Owens, D.A. |
| Title |
The Twilight Envelope: A User-Centered Approach to Describing Roadway Illumination at Night |
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Journal Article |
| Year |
2001 |
Publication |
Human Factors: The Journal of the Human Factors and Ergonomics Society |
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43 |
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4 |
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620-630 |
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| Abstract |
Visual recognition functions, such as acuity and contrast sensitivity, deteriorate rapidly over the declining luminances found during civil twilight. Thus civil twilight, a critical part of the transition between daylight and darkness, represents lighting conditions that may be useful to describe artificial illumination. Automotive headlamps project a three-dimensional beam that ranges from illumination levels comparable to daylight at the vehicle to the dark limit of civil twilight (3.3 1x) at some distance ahead. This twilight envelope is characterized as a distance beyond which foveal visual functions are severely impaired, and thus it provides a general, functional description of the useful extent of the headlamp beam. This user-centered approach to describing illumination is useful for characterizing visibility when driving at night or in other artificially lit environments. This paper discusses the twilight envelope approach and its application to intervehicle variations in headlamp systems. Actual or potential applications of this research include user-centered description of artificial illumination and driver/pedestrian safety education. |
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LoNNe @ kagoburian @ |
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988 |
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Arnold, V. (ed) |
| Title |
Als das Licht kam: Erinnerungen an die Elektrifizierung |
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1986 |
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Wien, Köln, Graz. Böhlau |
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Arnold, V. |
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LoNNe @ kagoburian @ |
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989 |
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Barker, R.; Cohen, C. |
| Title |
Photoflashes: a potential new tool for control of insect populations. |
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1964 |
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Science |
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145 |
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1195–1197 |
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LoNNe @ schroer @ |
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591 |
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Barker, R. J.; Cohen, C. F. |
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Light-dark cycles and Diapause induction in Pieris rapae (L.). |
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1965 |
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Entomologia Experimentalis et Applicata |
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8 |
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1 |
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27–32 |
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LoNNe @ kagoburian @ |
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592 |
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Eisenbeis, G.; Hassel, F. |
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Zur Anziehung nachtaktiver Insekten durch Straßenlaternen-eine Studie kommunaler Beleuchtungseinrichtungen in der Agrarlandschaft Rheinhessens. |
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2000 |
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Natur Und Landschaft |
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4 |
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145–156 |
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LoNNe @ kagoburian @ |
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596 |
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