Results 61 to 70 of about 4,608,934 (308)

Pc5 Magnetic Pulsations during the Outer Electron Radiation Belt

open access: yesInternational Journal of Technology, 2014
Since the discovery of the radiation belt decades ago, there still remain some fundamental questions as to which one is the mechanism responsible for the acceleration of electrons. Ground-based Pc5 magnetic pulsation during the process of increasing of 2-
L. Muhammad Musafar K   +4 more
doaj   +1 more source

Evapotranspiration Estimation Using Machine Learning Methods

open access: yesJournal of Horticultural Research, 2023
The study examined the performance of four machine learning algorithms (regression trees, boosted trees, random forests, and artificial neural networks) for estimating evapotranspiration (ETo) based on incomplete meteorological data.
Treder Waldemar   +3 more
doaj   +1 more source

A Comparative Evaluation of Artificial Neural Network and Sunshine Based models in prediction of Daily Global Solar Radiation of Lalibela, Ethiopia

open access: yesCogent Engineering, 2022
Due to a lack of solar radiation measurement instruments in various regions across the world, particularly in Ethiopia, many empirical models have been developed to estimate global solar radiation. Reliable global solar radiation information is essential
Tegenu Argaw Woldegiyorgis   +3 more
doaj   +1 more source

Orbital dynamics of high area-to-mass ratio spacecraft under the influence of J2 and solar radiation pressure [PDF]

open access: yes, 2011
This paper investigates the effect of planetary oblateness and solar radiation pressure on the orbit of high area-to-mass spacecraft. A planar Hamiltonian model shows the existence of equilibrium orbits with the orbit apogee pointing towards or away from
Colombo, Camilla   +2 more
core   +3 more sources

Solar Radiation Pressure Enabled Femtosatellite-Based Earth Remote Sensing [PDF]

open access: yesIEEE Transactions on Aerospace and Electronic Systems, 2020
Recent developments in electronics have pushed miniaturised satellites to the femto-scale, with masses between 10 and 100 g. Although femtosatellites have been proven as a feasible concept, most designs are limited in mission capacity and lifetime due to the lack of environmental protection and onboard propellant.
Cao, J.   +3 more
openaire   +4 more sources

Orbit design for future SpaceChip swarm missions in a planetary atmosphere [PDF]

open access: yes, 2012
The effect of solar radiation pressure and atmospheric drag on the orbital dynamics of satellites-on-a-chip (SpaceChips) is exploited to design equatorial long-lived orbits about the oblate Earth.
Colombo, Camilla, McInnes, Colin
core   +4 more sources

Solar Climate Features Taking into Account the Morphometric Conditions of the Area and the Possibility of Using Them in Heliotherapy on the Example of the Cieplice and Kołobrzeg Health Resorts (Poland)

open access: yesAtmosphere, 2021
Global solar radiation is an important atmospheric stimulus affecting the human body and has been used in heliotherapy for years. In addition to environmental factors, the effectiveness of global solar radiation is increasingly influenced by human ...
Dawid Szatten, Mirosław Więcław
doaj   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

open access: yesAdvanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein   +4 more
wiley   +1 more source

Estimating Global Solar Radiation from Empirical Models: An Application

open access: yesEuropean Mechanical Science, 2021
Solar radiation data are required for many applications and many areas of research. In order to achieve this, several empirical models have been suggested to predict the global solar radiation in Turkey and other countries.
Özgür Balli
doaj   +1 more source

Tuning the Optoelectronic Properties of Wide Bandgap Perovskites: Data‐Driven Insights from Combinatorial Synthesis and High‐Throughput Experimentation

open access: yesAdvanced Functional Materials, EarlyView.
Combinatorial vapor deposition enables independent tuning of Cs/Pb and Br/Cl in wide‐bandgap perovskites. Automated multimodal mapping of 500+ compositions reveals a high‐energy optical transition that correlates with enhanced photoluminescence, defining a practical Cs/Pb window.
Alexander Wieczorek   +6 more
wiley   +1 more source

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