منابع مشابه
The night the lights went out.
MIT, Harvard, and the surrounding areas lost power from 4:26 to 6:37 p.m. yesterday. The outage threw the Institute into darkness — classes were canceled, MBTA service was delayed, and police were dispatched to direct traffic. Emergency power remained on in dormitories and around campus. The problem is thought to be related to a transmission line in the area, said Michael Durand, NStar spokesma...
متن کاملGlobal Night-Time Lights for Observing Human Activity
We present a concept for a small satellite mission to make systematic, global observations of night-time lights with spatial resolution suitable for discerning the extent, type and density of human settlements. The observations will also allow better understanding of fine scale fossil fuel CO2 emission distribution. The NASA Earth Science Decadal Survey recommends more focus on direct observati...
متن کاملNight Time Vehicle Detection Using Tail Lights: A Survey
The main challenge during night-time driving is the visibility of the road ahead. The major challenge rests in controlling accidents during night as the night conditions differ from the day in environment conditions, vehicle lighting etc. The reduced cost of cameras and optical devices helped in installing front-mounted intelligent systems for identifying forward collision avoidance and mitigat...
متن کاملSensory Ecology: Night Lights Alter Reproductive Behavior of Blue Tits
Research on songbirds indicates that streetlights influence timing of dawn chorus, egg-laying and male success in siring extra-pair young, providing new evidence that artificial lighting is an ecologically disruptive force.
متن کاملSpatial Analysis of Global Urban Extent from Night Lights
Previous studies of DMSP-OLS stable night lights have shown encouraging agreement between temporally stable lighted areas and various definitions of urban extent. However, these studies have also highlighted an inconsistent relationship between the actual lighted area and the boundaries of the urban areas considered. Applying detection frequency thresholds can reduce the spatial overextent of l...
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ژورنال
عنوان ژورنال: Nature
سال: 1997
ISSN: 0028-0836,1476-4687
DOI: 10.1038/36217