Results 291 to 300 of about 7,175,761 (309)

Light absorption by leaf chlorophyll and maximum light use efficiency

IEEE Transactions on Geoscience and Remote Sensing, 2006
The MODIS Land Science Team has produced a standard product of gross primary production (GPP) for the global land biosphere, using a satellite-based Production Efficiency Model. In this special issue for the validation studies, two papers have examined the accuracy, error, and uncertainty of the GPP product.
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Efficient curing of adhesives using laser light

Conference Digest. 2000 Conference on Lasers and Electro-Optics Europe (Cat. No.00TH8505), 2002
Summary form only given. Within the last years, ultra-violet radiation is being increasingly used for the initiation of polymerisation reactions, mainly because of the high efficiency and the high curing velocity of this type of initiation. Light curing provides a number of economic advantages over the operations usually used: rapid through-cure, low ...
H. Haferkamp, A. von Busse, M. Goede, O. Thurk, J. Stein   +4 more
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Exploring vegetation photosynthetic light-use efficiency using hyperspectral data

SPIE Proceedings, 2012
ABSTRACT Photosynthetic light-use efficiency (LUE) is an important indicator of plant photosynthesis, but assessment by remote sensing needs to be further explored. In principle, chlorophyll fluorescence combined with heat dissipation is an expression of the balance between light harvesting (absorption) and light utilization in the photosynthetic ...
Liangyun Liu, Quanjun Jiao, Dailiang Peng   +2 more
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Spectrally efficient slow light using multilevel phase-modulated formats

Optics Letters, 2007
A phase-preserving and spectrally efficient slow-light scheme has been proposed and demonstrated by utilizing advanced multilevel phase-modulated formats. A 60 ps symbol delay with error-free demodulation of both I and Q channels for 10 Gbit/s return-to-zero differential-quadrature-phase-shift-keyed (DQPSK) signals via a broadband stimulated Brillouin ...
Bo, Zhang, Lianshan, Yan, Lin, Zhang, Scott, Nuccio, Louis, Christen, Teng, Wu, Alan E, Willner   +6 more
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EFFICIENCY OF USING ENERGY-EFFICIENT LIGHTING IN GREENHOUSES

FOOD SECURITY OF UKRAINE IN THE CONDITIONS OF POST-WAR RECOVERY: GLOBAL AND NATIONAL DIMENSIONS INTERNATIONAL FORUM Proceedings of the international scientific-practical conference
. In the context of global climate change and the need to reduce the consumption of traditional energy resources, energy-efficient technologies are becoming increasingly important in agriculture, especially in greenhouse production. One of the key areas for optimizing energy consumption is the introduction of energy-efficient lighting, which ...
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Light use efficiency of lettuce cultivation in vertical farms compared with greenhouse and field

Food and Energy Security, 2022
W. Jin, David Formiga Lopez, E. Heuvelink, L. Marcelis   +3 more
semanticscholar   +1 more source

Improving satellite-based modelling of gross primary production in deciduous broadleaf forests by accounting for seasonality in light use efficiency

International Journal of Remote Sensing, 2018
Vegetation gross primary production (GPP), the photosynthetic yields by green plants per unit area per unit time, is a key metric of carbon flux in understanding the land–atmosphere interactions and terrestrial carbon cycles.
Xuewen Zhou, Q. Xin
semanticscholar   +1 more source

Enhanced Visible Light Conversion Efficiency Using Nanocrystalline WO3 Films

Advanced Materials, 2001
Drastically improved photooxidation efficiencies,when compared to bulk WO 3 , are obtained with nanocrystalline WO 3 films (see Figure) deposited from a colloidal solution of tungstic acid. Saturation of the photocurrent, which occurs even for moderate potential differences, indicates a completely different mechanism of charge separation.
Santato, Clara, Ulmann, Martine Jeanne, Augustynski, Jan   +2 more
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Sustainable energy-efficient wireless applications using light

IEEE Communications Magazine, 2010
As we step further into the 21st century, the demand for sustainable energy-efficient technology grows higher. The important area of electric lighting, currently dominated by decades-old incandescent and fluorescent sources, is being taken over by white light emitting diodes, which are solid state devices with much greater energy savings.
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Efficient Depth Edge Detection Using Structured Light

2005
This research features a novel approach that efficiently detects depth edges in real world scenes. Depth edges play a very important role in many computer vision problems because they represent object contours. We strategically project structured light and exploit distortion of the light pattern in the structured light image along depth discontinuities
Jiyoung Park, Cheolhwon Kim, Juneho Yi, Matthew Turk   +3 more
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