Results 31 to 40 of about 95,901 (217)

A low‐cost protocol for the optical method of vulnerability curves to calculate P50

Applications in Plant Sciences, EarlyView.
Abstract Premise The quantification of plant drought resistance, particularly embolism formation, within and across species, is critical for ecosystem management and agriculture. We developed a cost‐effective protocol to measure the water potential at which 50% of hydraulic conductivity (P50) is lost in stems, using affordable and accessible materials ...
Georgina González‐Rebeles, Miguel Ángel Alonso‐Arevalo, Eulogio López, Rodrigo Méndez‐Alonzo   +3 more
wiley   +1 more source

Nutrient input from the Colorado River to the northern Gulf of California is not required to maintain a productive pelagic ecosystem

Ciencias Marinas, 2015
The high phytoplankton production (PP) of the northern Gulf of California (NGC) supports a rich biodiversity and fisheries with high yields. The NGC is the habitat of the vaquita (Phocoena sinus), the cetacean most at risk of extinction in the world ...
Mario Rafael Ramírez-León, Saúl Álvarez-Borrego, Cuauhtémoc Turrent-Thompson, Gilberto Gaxiola-Castro, Gisela Heckel Dziendzielewski   +4 more
doaj   +1 more source

Yucatan Current variability through the Cozumel and Yucatan channels

Ciencias Marinas, 2011
A comparison based on eight months of simultaneous observations of the flow variability in the Yucatan and Cozumel channels shows that the portion of the Yucatan Current that crosses through Cozumel Channel is best correlated with the flow near the ...
G Athié, J Candela, J Sheinbaum, A Badan, J Ochoa   +4 more
doaj   +1 more source

Superiorization as a novel strategy for linearly constrained inverse radiotherapy treatment planning [PDF]

arXiv, 2022
We apply the superiorization methodology to the intensity-modulated radiation therapy (IMRT) treatment planning problem. In superiorization, linear voxel dose inequality constraints are the fundamental modeling tool within which a feasibility-seeking projection algorithm will seek a feasible point. This algorithm is then perturbed with gradient descent
arxiv  

Alloying Engineering of Defective Molybdenum Sulfide Basal Planes for Enhanced Borrowing Hydrogen Activity in the Thioetherification of Alcohols

ChemSusChem, EarlyView.
Tungsten alloying makes the difference: The synthesis of thioethers from readily available alcohols and thiols is achieved by a borrowing‐hydrogen methodology applying alloyed molybdenum and tungsten sulfide catalysts engineered from molecular cluster complexes.
Miriam Rodenes, Darija Oštrić, Santiago Martín, Patricia Concepción, Avelino Corma, Iván Sorribes   +5 more
wiley   +1 more source

Structural pattern of the Todos Santos Coastal Plain, based on geophysical data

Ciencias Marinas, 2004
A set of gravity and magnetic data taken within the Todos Santos Coastal Plain between 1962 and 2000 from land, sea and air is used to integrate the structural framework and tectonic model of this area. The present work collected all the available data,
MA Pérez-Flores, F Suárez-Vidal, LA Gallardo-Delgado, A González-Fernández, R Vázquez   +4 more
doaj   +1 more source

Performance evaluation of LoRa technology for agricultural applications in rural areas

Dyna, 2021
This article presents the results obtained in the evaluation of the LoRa technology as an alternative communication protocol for agricultural applications, by making measurements in situ in a rural area between the municipalities of Sibaté and Granada in
Jhonatan Paolo Tovar Soto, Carlos Francisco Pareja Figueredo, Oscar Leonardo García Navarrete, Luis Carlos Gutiérrez Martinez   +3 more
doaj   +1 more source

Superiorization: An optimization heuristic for medical physics [PDF]

, 2012
Purpose: To describe and mathematically validate the superiorization methodology, which is a recently-developed heuristic approach to optimization, and to discuss its applicability to medical physics problem formulations that specify the desired solution (of physically given or otherwise obtained constraints) by an optimization criterion.
arxiv   +1 more source

Total variation superiorization schemes in proton computed tomography image reconstruction [PDF]

Medical Physics, Vol. 37, pp. 5887-5895, (2010), 2010
Purpose: Iterative projection reconstruction algorithms are currently the preferred reconstruction method in proton computed tomography (pCT). However, due to inconsistencies in the measured data arising from proton energy straggling and multiple Coulomb scattering, noise in the reconstructed image increases with successive iterations.
arxiv   +1 more source

Sodium‐Manganese Oxides in Faradaic Desalination: Achieving Long‐Cycling Stability Through Morphological and Structural Optimization

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
The performance of sodium‐manganese oxides (NMOs) as electrode materials for faradaic deionization is explored to address the challenges of water desalination. By investigating the impact of their morphology and crystal structure, a mixed‐phase NMO demonstrates enhanced salt removal capacity and long‐term stability over 870 cycles, highlighting its ...
Alba Fombona‐Pascual, Sergio Pinilla, Irene Hormigos, Jesús Palma, Julio J. Lado   +4 more
wiley   +1 more source