Results 81 to 90 of about 406,860 (186)

Aboveground Biomass Mapping of Crops Supported by Improved CASA Model and Sentinel-2 Multispectral Imagery

open access: yesRemote Sensing, 2021
The net primary productivity (NPP) and aboveground biomass mapping of crops based on remote sensing technology are not only conducive to understanding the growth and development of crops but can also be used to monitor timely agricultural information ...
Peng Fang   +4 more
doaj   +1 more source

Spectral signatures of photosynthesis I: Review of Earth organisms

open access: yes, 2007
Why do plants reflect in the green and have a 'red edge' in the red, and should extrasolar photosynthesis be the same? We provide: 1) a brief review of how photosynthesis works; 2) an overview of the diversity of photosynthetic organisms, their light ...
Bebout B.M.   +13 more
core   +1 more source

Detectability of red-edge-shifted vegetation on terrestrial planets orbiting M stars [PDF]

open access: yes, 2006
We have explored the detectability of exovegetation on the surface of a terrestrial planet orbiting an M star. The exovegetation is responsible for producing a pigment-derived surface signature that is redshifted with respect to the Earth vegetation's ...
Rashby, Sky   +2 more
core   +2 more sources

Convective quenching of stellar pulsations [PDF]

open access: yes, 2011
Context: we study the convection-pulsation coupling that occurs in cold Cepheids close to the red edge of the classical instability strip. In these stars, the surface convective zone is supposed to stabilise the radial oscillations excited by the kappa ...
Arnoldi   +40 more
core   +1 more source

Active Ground Optical Remote Sensing for Improved Monitoring of Seedling Stress in Nurseries

open access: yesSensors, 2010
Active ground optical remote sensing (AGORS) devices mounted on overhead irrigation booms could help to improve seedling quality by autonomously monitoring seedling stress.
Jan U. H. Eitel   +4 more
doaj   +1 more source

Impact of Vertical Canopy Position on Leaf Spectral Properties and Traits across Multiple Species

open access: yesRemote Sensing, 2018
Understanding the vertical pattern of leaf traits across plant canopies provide critical information on plant physiology, ecosystem functioning and structure and vegetation response to climate change.
Tawanda W. Gara   +3 more
doaj   +1 more source

Characterizing the pulsations of the ZZ Ceti star KUV 02464+3239

open access: yes, 2009
We present the results on period search and modeling of the cool DAV star KUV 02464+3239. Our observations resolved the multiperiodic pulsational behaviour of the star.
A. Bischoff-Kim   +37 more
core   +1 more source

The Extent and Cause of the Pre-White Dwarf Instability Strip [PDF]

open access: yes, 1999
One of the least understood aspects of white dwarf evolution is the process by which they are formed. We are aided, however, by the fact that many H- and He-deficient pre-white dwarfs (PWDs) are multiperiodic g-mode pulsators.
Dreizler S.   +8 more
core   +2 more sources

Monitoring Water Stress in Grapevine (Vitis vinifera L.) Using Proximal Hyperspectral Imaging

open access: yesPlants
This study addresses the early detection of water stress in grapevines (Vitis vinifera L. cv. Monastrell), a key challenge for precision irrigation.
Jon Ruiz-de-Gauna   +6 more
doaj   +1 more source

Proper Hamiltonian Cycles in Edge-Colored Multigraphs [PDF]

open access: yes, 2017
A $c$-edge-colored multigraph has each edge colored with one of the $c$ available colors and no two parallel edges have the same color. A proper Hamiltonian cycle is a cycle containing all the vertices of the multigraph such that no two adjacent edges ...
Borozan, Valentin   +4 more
core   +5 more sources

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