Results 51 to 60 of about 1,678 (182)

Ray Tracing Method in a General Non‐Dipole Magnetic Field

Journal of Geophysical Research: Space Physics, Volume 131, Issue 8, August 2026.
Abstract We present a new general mathematical formulation of the Eikonal equations for ray tracing, which can use any internal magnetic field model. The analytical and tractable expressions are conveniently based on a vector formalism, which is independent of any coordinate system.
P.‐L. Blelly, J.‐F. Ripoll, A. Dubois, R. B. Horne, A. Marchaudon   +4 more
wiley   +1 more source

Evaluating potential restoration strategies for vascular epiphytes with niche‐based community mechanistic models

Journal of Applied Ecology, Volume 63, Issue 8, August 2026.
Generally, delayed restoration of adult‐only epiphyte populations into older restored forests improves conservation outcomes. However, restoration can be optimised, initially introducing large populations of fast‐growing, light‐when‐mature species in younger forests followed by the later introduction of slow‐growing, heavy‐when‐mature species in ...
Zachary Chu, Thomas Kappas, Mohammad Afraz Ahmed, Laura J. Graham, Alexandre Antonelli, Juliano Sarmento Cabral   +5 more
wiley   +1 more source

Performance evaluation of a parabolic trough collector with a uniform helical wire coil flow insert

Results in Engineering
Solar energy is an extremely useful and dependable renewable energy source for meeting our society's diverse energy demands. Solar concentrator-based energy systems are currently the most efficient methods of using solar energy. Among these technologies,
Prashant Saini, Atul Dhar, Satvasheel Powar   +2 more
doaj   +1 more source

Estimating Baseline Flow Resistance Parameters for Remote Sensing River Discharge (RSQ) From River Morphology Characteristics

JAWRA Journal of the American Water Resources Association, Volume 62, Issue 4, August 2026.
ABSTRACT This study demonstrates that flow resistance in rivers, quantified via calibration of a modified Manning's equation, can inform its estimation from channel hydrometric information available from regional or global datasets for a limited set (N = 14) of rigorously calibrated river reaches in Alaska and with less certainty in a large set (N ...
David M. Bjerklie, Merritt E. Harlan, Ethan J. Shavers, Craig B. Brinkerhoff, Lawrence V. Stanislawski, J. Toby Minear, Robert W. Dudley   +6 more
wiley   +1 more source

Experimental and analytical evaluation of nanofluid based parabolic trough solar collector under varying concentrations, flow rates, and ambient temperatures

Case Studies in Thermal Engineering
Among the various solar energy harnessing techniques, the parabolic trough solar collector has emerged as a widely adopted and proven method, delivering solid performance results for both domestic and industrial applications.
Vijayan Gopalsamy, Karunakaran Rajasekaran, Roberto Baccoli   +2 more
doaj   +1 more source

Direct Steam Generation in Parabolic Trough Collectors

Energy Procedia, 2014
Existing commercial parabolic trough power plants use thermal oil as a heat transfer fluid, with working temperatures in the region of 400ºC. In order to achieve more efficient generating systems, a second generation of parabolic troughs that operate at temperatures higher than 400ºC is being developed.
Alguacil, M., Prieto, Cristina, Rodríguez-Sánchez, Alfonso, Lohr, Jenny   +3 more
openaire   +2 more sources

Mapping CO2 Migration Pathways: Interactions With Geological Structures

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Unintended CO2 releases from carbon capture and storage sites could impact water resources or reverse climate mitigation efforts through atmospheric emissions. Comprehensive understanding of how CO2 migrates in the shallow subsurface is required for appropriate monitoring of any CO2 release.
Nicholas A. Ashmore, Magdalena M. Krol, Stuart M. V. Gilfillan, Ian L. Molnar   +3 more
wiley   +1 more source

Hybridization of Parabolic Trough Power Plants with Natural Gas

Energy Procedia, 2014
AbstractHybridization may be an intermediate step on the way to the 100% renewable energy era. In respect of the specific CO2 emissions natural gas has to be preferred compared to hard coal or lignite. Most fossil fuel fired power plants as well as concentrated solar thermal power plants use the water/steam cycle for power generation.
Vogel, Tobias, Oeljeklaus, Gerd, Görner, Klaus, Dersch, Jürgen, Polklas, Thomas   +4 more
openaire   +3 more sources

Synergistic Enhancement of Solar Thermal Energy Storage Using Al2O3 Nano‐PCM and TiO2 Nanocoated Absorber Surfaces

Engineering Reports, Volume 8, Issue 7, July 2026.
Al2O3‐reinforced phase change material and TiO2 nanocoated absorbers enhanced solar heat absorption, thermal storage, and photothermal conversion efficiency. Optimized 1.5 wt.% Al2O3 improved thermal conductivity and energy retention, achieving 90.7°C outlet temperature and 79.5% thermal efficiency for advanced solar thermal energy storage applications.
Sathish Thanikodi, Taoufik Saidani, Saravanan Rathinasamy, Seif Al Bustanji, Arul Gnana Dhas Anderson, Ramya Maranan, A. Johnson Santhosh   +6 more
wiley   +1 more source

Parabolic Trough Solar Collector Initial Trials

Journal of Mechatronics, Electrical Power, and Vehicular Technology, 2012
This paper discusses initial trials of parabolic trough solar collector (PTSC) in Bandung. PTSC model consists of concentrator, absorber and tracking system. Concentrator designs are made with 2m aperture width, 6m length and 0.75m focal distance.
Ghalya Pikra, Agus Salim, Andri Joko Purwanto, Zaidan Eddy   +3 more
doaj   +1 more source