Results 101 to 110 of about 247,915 (271)

AERONET sun photometer as a didactic tool for understanding aerosol refractive index in the atmosphere: a case study for central Amazon [PDF]

open access: yesRevista Brasileira de Ensino de Física
As the impacts of climate change become increasingly evident, understanding the role of atmospheric aerosols in regulating Earth’s climate is crucial. Despite their significance, the optical properties of aerosols remain unclear to the general public and,
Marco A. Franco   +5 more
doaj   +1 more source

Solar Fuels Via Methane Valorization: Thermochemical Pathways, Unified Metrics, and Techno‐Economic Perspectives

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
A first‐of‐its‐kind review benchmarks three solar methane valorization pathways with unified performance metrics for clean fuel production. Meeting global climate targets and sustainable energy demands requires carbon‐neutral fuels and innovative conversion pathways.
Muhammad Abdulmoez   +3 more
wiley   +1 more source

Landsat-8 Sensor Characterization and Calibration

open access: yesRemote Sensing, 2015
Landsat-8 was launched on 11 February 2013 with two new Earth Imaging sensors to provide a continued data record with the previous Landsats. For Landsat-8, pushbroom technology was adopted, and the reflective bands and thermal bands were split into two ...
Brian Markham, James Storey, Ron Morfitt
doaj   +1 more source

Hybrid Oxygen Enrichment and Preheating Strategy for Performance Recovery in Ultra‐Lean Micro–Trapped Vortex Combustors

open access: yesEnergy Science &Engineering, EarlyView.
Ultra‐lean H2 micro‐combustor performance is boosted through regulated O2 enrichment and inlet preheating. A 16‐case Taguchi study (ϕ = 0.3) shows: controlled enrichment and heating increase radiative output and efficiency, but excessive O2/temperature causes flashback.
Anouar Benzitouni   +4 more
wiley   +1 more source

The Compound Flux-path Three Phase Stator Hybrid Excited Doubly Salient DC Generator and Its Transient FEM Analysis

open access: yesKongzhi Yu Xinxi Jishu, 2011
The field windings and permanent magnets of compound flux-path three-phase stator hybrid excited doubly salient DC generator are on the same cross-section orthogonal to the shaft, where flux excited by field windings and permanent magnets multiplexes the
万伟锐   +3 more
doaj  

Exploring the Relationships Between a Toxic Workplace Environment, Workplace Stress, and Project Success with the Moderating Effect of Organizational Support: Empirical Evidence from Pakistan

open access: yesRisk Management and Healthcare Policy, 2020
Zilong Wang,1,* Shah Zaman,1,* Samma Faiz Rasool,2,* Qamar uz Zaman,1,* Asad Amin3,* 1College of Economics and Management, Nanjing University of Aeronautics and Astronautics, Nanjing, 211106, People’s Republic of China; 2School of Innovation and ...
Wang Z   +4 more
doaj  

Optimization and Cost Evaluation of an Autonomous Hybrid Renewable Energy System for Electrifying Rural Areas in Nigeria

open access: yesEnergy Science &Engineering, EarlyView.
This research explores the techno‐economic and environmental performance of fully renewable hybrid energy systems for rural electrification in Auchi, Nigeria. HOMER Pro is utilized to model and optimize PV/WT/Battery, PV/Battery, and WT/Battery configurations under identical conditions.
Ibrahim Seidu   +7 more
wiley   +1 more source

Numerical study on transonic shock oscillation suppression and buffet load alleviation for a supercritical airfoil using a microtab

open access: yesEngineering Applications of Computational Fluid Mechanics, 2016
The effect of microtabs on shock oscillation suppression and buffet load alleviation for the National Aeronautics and Space Administration (NASA) SC(2)-0714 supercritical airfoil is studied.
Jinli Liu, Zhichun Yang
doaj   +1 more source

Routing Multiple Unmanned Vehicles in GPS-Denied Environments

open access: yes, 2018
This article aims to develop novel path planning algorithms required to deploy multiple unmanned vehicles in Global Positioning System (GPS) denied environments.
Misra, Sohum   +4 more
core   +1 more source

Active Stiffness Modulation of Flexible PDMS Elastomer by Embedding Shape Memory Alloy Wires: Fabrication and Modeling

open access: yesFlexTech, EarlyView.
Active stiffness modulation is achieved in NiTi shape memory alloy‐reinforced PDMS and carbon fiber‐epoxy composites, with reversible 3‐fold modulus increase via Joule heating and validated predictive models, which resolves longstanding adaptive design challenges.
Xi Yi, Dongjie Jiang
wiley   +1 more source

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