Results 51 to 60 of about 200,823 (294)

Small-Angle Particle Counting Coupled Photometry for Real-Time Detection of Respirable Particle Size Segmentation Mass Concentration

open access: yesSensors, 2021
Respirable particulate matter air pollution is positively associated with SARS-CoV-2 mortality. Real-time and accurate monitoring of particle concentration changes is the first step to prevent and control air pollution from inhalable particles.
Rongrui Zhang, Heng Zhao
doaj   +1 more source

Neuromorphic Optical Tracking and Imaging of Randomly Moving Targets Through Dynamic Dense Scattering Media

open access: yesAdvanced Science, EarlyView.
Vision begins not with images but with change: the retina fires only when something moves, handing the brain a stream of spikes. A neuromorphic imaging system adopts the same strategy—an event sensor that sees like the retina, a spiking network that thinks like the brain—to track and reconstruct fully randomly moving targets through tissue (phantom ...
Ning Zhang, Arto Nurmikko
wiley   +1 more source

Características de los aerosoles en la troposfera alta y la estratosfera baja en el Gran Caribe, en ausencia de perturbación volcánica.

open access: yesRevista Cubana de Meteorología, 2018
Se estudian las características medias de los aerosoles en la troposfera alta y la estratosfera baja sobre el Gran Caribe. Se emplearon perfiles de extinción por aerosoles, libres de nubes, a las longitudes de onda de 1.02ìm y 0.525ìm medidos por el ...
Juan Carlos Antuña   +2 more
doaj  

Parameter Study on Ultraviolet Rayleigh–Brillouin Doppler Lidar with Dual-Pass Dual Fabry–Perot Interferometer for Accurately Measuring Near-Surface to Lower Stratospheric Wind Field

open access: yesPhotonics
To suppress the influence of aerosols scattering on the double-edge detection technique and achieve high-accuracy measurement of the wind field throughout the troposphere to the lower stratosphere, an ultraviolet 355 nm Rayleigh–Brillouin Doppler lidar ...
Fahua Shen   +6 more
doaj   +1 more source

Integration of LIDAR and IFSAR for mapping [PDF]

open access: yes, 2004
LiDAR and IfSAR data is now widely used for a number of applications, particularly those needing a digital elevation model. The data is often complementary to other data such as aerial imagery and high resolution satellite data.
Dowman, I.J.
core  

Open‐Shell Conjugated Polymers Enable Photothermoelectric Conversion and Detection of Short‐Wave Infrared Light

open access: yesAdvanced Science, EarlyView.
Efficient conversion and detection of short‐wave infrared (SWIR) photons are becoming increasingly important for emerging photonic and energy technologies. Here, we report an organic photothermoelectric device based on an open‐shell conjugated polymer that enables SWIR energy conversion and photon detection via the photothermoelectric effect.
Guan‐Lin Chen   +5 more
wiley   +1 more source

BEYOND FLOOD HAZARD MAPS: DETAILED FLOOD CHARACTERIZATION WITH REMOTE SENSING, GIS AND 2D MODELLING [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
Flooding is considered to be one of the most destructive among many natural disasters such that understanding floods and assessing the risks associated to it are becoming more important nowadays.
J. R. Santillan   +3 more
doaj   +1 more source

Simulated Lidar Signals for Wake Vortex Detection ahead of the Aircraft [PDF]

open access: yes, 2012
Within the DLR-project “Wetter & Fliegen“ a feasibility study of airborne lidar sensors for active control at flying through wind shear and turbulent air masses (specifically wake vortices) was carried out.
Horn , Christian   +3 more
core  

Advances in Se Wide‐Bandgap Photovoltaics and TexSe1‐x SWIR Photodiodes

open access: yesAdvanced Science, EarlyView.
In this review, fundamental properties and current challenges in Se photovoltaics (PVs) for tandem and indoor PVs and TexSe1‐x alloys for short wave infrared photodiodes are discussed. A case is made for the practicality of elemental chalcogenide optoelectronics, and a pathway toward resolving the key challenges in these respective technologies is ...
Adam D. Alfieri, Deep Jariwala
wiley   +1 more source

Development of a Multiparametric Lidar with the depolarization sensor [PDF]

open access: yes, 2009
The topic of this work was the design, the realization and the calibration of the depolarization sensor added in the Napoli Lidar (Light Detection and Ranging) system.
Nasti, Libera
core   +1 more source

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