Results 51 to 60 of about 34,981 (232)

Fine Classification of UAV Urban Nighttime Light Images Based on Object-Oriented Approach

open access: yesSensors, 2023
Fine classification of urban nighttime lighting is a key prerequisite step for small-scale nighttime urban research. In order to fill the gap of high-resolution urban nighttime light image classification and recognition research, this paper is based on a
Daoquan Zhang   +3 more
doaj   +1 more source

Rhythms of Locomotion Expressed by Limulus polyphemus, the American Horseshoe Crab: II. Relationship to Circadian Rhythms of Visual Sensitivity [PDF]

open access: yes, 2008
In the laboratory, horseshoe crabs express a circadian rhythm of visual sensitivity as well as daily and circatidal rhythms of locomotion. The major goal of this investigation was to determine whether the circadian clock underlying changes in visual ...
Bedford, Lisa   +2 more
core   +3 more sources

Artificial nighttime light changes aphid-parasitoid population dynamics [PDF]

open access: yesScientific Reports, 2015
AbstractArtificial light at night (ALAN) is recognized as a widespread and increasingly important anthropogenic environmental pressure on wild species and their interactions. Understanding of how these impacts translate into changes in population dynamics of communities with multiple trophic levels is, however, severely lacking.
Sanders, D   +7 more
openaire   +3 more sources

Assessing the economic loss due to natural disasters from outer space

open access: yesClimate Services, 2022
We propose an innovative approach to provide climate service by using the geographic distributions of natural disasters, assets exposed to disasters, and nighttime lights to estimate the potential benefit of climate-change adaptation through the economic
Yuan Cheng, Xuehui Han
doaj   +1 more source

Dark Model Adaptation: Semantic Image Segmentation from Daytime to Nighttime

open access: yes, 2018
This work addresses the problem of semantic image segmentation of nighttime scenes. Although considerable progress has been made in semantic image segmentation, it is mainly related to daytime scenarios.
Dai, Dengxin, Van Gool, Luc
core   +1 more source

Shedding Light on the Shadow Economy: A Nighttime Light Approach

open access: yesThe Journal of Development Studies, 2016
AbstractMeasuring the shadow economy is inherently difficult, but critical for understanding economic development. Using census data on formal and informal sectors in Cambodia, we document that 96.6 per cent of non-farm establishments do not formally register with the government, and their sales accounted for 76.6 per cent of total sales in 2011 ...
Tanaka, Kiyoyasu, Keola, Souknilanh
openaire   +1 more source

The Annual Cycling of Nighttime Lights in India

open access: yesRemote Sensing, 2021
India is known to have unstable power supply, and many locations show an annual cycle in VIIRS Nighttime Light (VNL). In this study, autocorrelation function (ACF) analysis is used to identify the annual cycling in VNL.
Fengchi Hsu   +4 more
doaj   +1 more source

Acute knockdown of Kv4.1 regulates repetitive firing rates and clock gene expression in the suprachiasmatic nucleus and daily rhythms in locomotor behavior [PDF]

open access: yes, 2017
Rapidly activating and inactivating A-type K+currents (IA) encoded by Kv4.2 and Kv4.3 pore-forming (α) subunits of the Kv4 subfamily are key regulators of neuronal excitability.
Granados-Fuentes, Daniel   +4 more
core   +2 more sources

Detecting Urban Sprawl through Nighttime Light Changes

open access: yesSustainability, 2023
Numerous cities around the world are currently experiencing surges in population growth and urban expansion, often accompanied by uncontrolled sprawl. It is widely recognized that unplanned urban development contributes to a decline in urban sustainability.
Masanobu Kii, Kunihiko Matsumoto
openaire   +1 more source

Living in darkness: rural poverty in Venezuela

open access: yesJournal of Applied Economics, 2023
This paper uses nighttime lights imagery and gridded population datasets to estimate 2000–2020 rural poverty rates for Venezuela at the state and municipality levels.
Leonardo Maldonado
doaj   +1 more source

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