Results 31 to 40 of about 6,290,398 (299)

Synergistic Effects of Melatonin and Gamma-Aminobutyric Acid on Protection of Photosynthesis System in Response to Multiple Abiotic Stressors

open access: yesCells, 2021
GABA (gamma-aminobutyric acid) and melatonin are endogenous compounds that enhance plant responses to abiotic stresses. The response of Vicia faba to different stressors (salinity (NaCl), poly ethylene glycol (PEG), and sulfur dioxide (SO2)) was studied ...
Aida Shomali   +8 more
doaj   +1 more source

Satellite Investigation of Semidiurnal Internal Tides in the Sulu-Sulawesi Seas

open access: yesRemote Sensing, 2021
The mode-1 semidiurnal internal tides that emanate from multiple sources in the Sulu-Sulawesi Seas are investigated using multi-satellite altimeter data from 1993–2020.
Xiaoyu Zhao   +7 more
doaj   +1 more source

Small scale energy release driven by supergranular flows on the quiet Sun [PDF]

open access: yes, 2007
In this article we present data and modelling for the quiet Sun that strongly suggest a ubiquitous small-scale atmospheric heating mechanism that is driven solely by converging supergranular flows. A possible energy source for such events is the power
Diver, D., Potts, H.E., Khan, J.
core   +1 more source

Impact of the motor magnetic model on direct flux vector control of interior PM motors [PDF]

open access: yes, 2011
The stator-field-oriented, direct-flux vector control has been proven to be effective in terms of linear torque control and model independent performance at limited voltage and current (i.e. in flux weakening) for AC drives of various types.
Radu Bojoi   +7 more
core   +1 more source

On the determination of the spatial energy balance of a megacity on the example of Cairo, Egypt [PDF]

open access: yes, 2010
This research deals with different aspects of the spatial urban energy balance on the example of the megacity Cairo, Egypt. The energy balance and its single terms were measured in situ during a field campaign in Cairo at three different locations (urban,
Frey, Corinne Myrtha
core   +1 more source

Neoclassical Navier–Stokes Equations Considering the Gyftopoulos–Beretta Exposition of Thermodynamics

open access: yesEnergies, 2020
The seminal Navier–Stokes equations were stated even before the creation of the foundations of thermodynamics and its first and second laws. There is a widespread opinion in the literature on thermodynamic cycles that the Navier–Stokes equations cannot ...
Janusz Badur   +2 more
doaj   +1 more source

Power Control of a Nonpitchable PMSG-Based Marine Current Turbine at Overrated Current Speed With Flux-Weakening Strategy [PDF]

open access: yes, 2014
This paper deals with power control strategies for a fixed-pitch direct drive marine current turbine (MCT) when the marine current velocity exceeds the rated value corresponding to the MCT nominal power.
SCUILLER, Franck   +6 more
core   +1 more source

Assessing electron heat flux dropouts as signatures of magnetic field line disconnection from the Sun [PDF]

open access: yes, 2005
Suprathermal electrons focused along magnetic field lines, called the strahl, carry heat flux away from the Sun. Various factors can cause heat flux dropouts (HFDs), including times when the strahl almost vanishes.
Larson, DE   +5 more
core   +1 more source

Power laws and inverse motion modelling: application to turbulence measurements from satellite images

open access: yesTellus: Series A, Dynamic Meteorology and Oceanography, 2012
In the context of tackling the ill-posed inverse problem of motion estimation from image sequences, we propose to introduce prior knowledge on flow regularity given by turbulence statistical models.
Pablo D. Mininni   +3 more
doaj   +1 more source

Evaluation of CMIP6 Global Climate Models for Simulating Land Surface Energy and Water Fluxes During 1979–2014

open access: yesJournal of Advances in Modeling Earth Systems, 2021
This study examined the overall performance of the climate models in Phase 6 of the Coupled Model Intercomparison Project (CMIP6) in simulating the key energy and water fluxes over land.
Jianduo Li   +6 more
doaj   +1 more source

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