Results 51 to 60 of about 2,017,621 (311)

Recovering Ion Distribution Functions. II. Gyrotropic Slepian Reconstruction of Solar Wind Electrostatic Analyzer Measurements

open access: yesThe Astrophysical Journal
Velocity distribution functions (VDFs) are an essential observable for studying kinetic and wave–particle processes in solar wind plasmas. To experimentally distinguish modes of heating, acceleration, and turbulence in the solar wind, precise ...
Srijan Bharati Das, Michael Terres
doaj   +1 more source

Deciphering Solar Magnetic Activity: Spotting Solar Cycle 25

open access: yesFrontiers in Astronomy and Space Sciences, 2017
We present observational signatures of solar cycle 25 onset. Those signatures are visibly following a migratory path from high to low latitudes. They had starting points that are asymmetrically offset in each hemisphere at times that are 21–22 years ...
Scott W. McIntosh, Robert J. Leamon
doaj   +1 more source

Characterisation and improvement of j(O1D) filter radiometers [PDF]

open access: yesAtmospheric Measurement Techniques, 2016
Atmospheric O3 →  O(1D) photolysis frequencies j(O1D) are crucial parameters for atmospheric photochemistry because of their importance for primary OH formation.
B. Bohn   +5 more
doaj   +1 more source

Heat Transfer Analysis and Modeling for a Coaxial Solar Collector in a Domestic Cogeneration System

open access: yes, 2011
The need for an efficient energy system in domestic houses push the research toward innovative cogeneration system, which can meets the needs for electricity, heating and cooling power.
Alberto Bertaso   +5 more
core   +1 more source

Photo‐Switchable Molecular Module Programming PET Biodegradation in Aquatic Environments

open access: yesAdvanced Functional Materials, EarlyView.
We address the plastic durability paradox by integrating an itaconic acid–derived pyrrolidone module into polymer backbones. Sunlight in water triggers Norrish Type I ring‐opening and hydrophilization, enabling rapid biodegradation into nontoxic minerals.
Mohammad Asif Ali   +16 more
wiley   +1 more source

Solar Sailing: applications and technology advancement [PDF]

open access: yes, 2011
Harnessing the power of the Sun to propel a spacecraft may appear somewhat ambitious and the observation that light exerts a force contradicts everyday experiences.
Macdonald, Malcolm
core   +2 more sources

Recovering Ion Distribution Functions. I. Slepian Reconstruction of Velocity Distribution Functions from MMS and Solar Orbiter

open access: yesThe Astrophysical Journal
Plasma velocity distribution functions (VDFs) constitute a fundamental observation of numerous operational and future missions. An efficient parameterization of VDFs is crucial for (1) preserving enough information to investigate macroscopic moments ...
Srijan Bharati Das, Michael Terres
doaj   +1 more source

Pixel-to-pixel Translation of Solar Extreme-ultraviolet Images for DEMs by Fully Connected Networks

open access: yesThe Astrophysical Journal Supplement Series, 2023
In this study, we suggest a pixel-to-pixel image translation method among similar types of filtergrams such as solar extreme-ultraviolet (EUV) images. For this, we consider a deep-learning model based on a fully connected network in which all pixels of ...
Eunsu Park   +8 more
doaj   +1 more source

Architecture‐Driven Functional Coupling in Vertically Aligned Nanocomposites

open access: yesAdvanced Functional Materials, EarlyView.
Vertically aligned nanocomposites define a growth‐engineered architecture in which vertical interfaces, strain fields, defect pathways, and phase connectivity are created simultaneously. This review shows how these architectural features couple ferroic, optical, ionic, electrochemical, and device responses, establishing design rules and open challenges
Md Shatil Islam‐Shanto   +4 more
wiley   +1 more source

Gossamer roadmap technology reference study for a solar polar mission [PDF]

open access: yes, 2013
A technology reference study for a solar polar mission is presented. The study uses novel analytical methods to quantify the mission design space including the required sail performance to achieve a given solar polar observation angle within a given ...
Finsterle, W   +65 more
core   +1 more source

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