Results 21 to 30 of about 10,701,163 (203)

Development and application of a global magnetic field evolution model for the solar corona [PDF]

open access: yes, 2009
Magnetic fields are fundamental to the structure and dynamics of the Sun’s corona. Observations show them to be locally complex, with highly sheared and twisted fields visible in solar filaments/prominences.
Yeates, Anthony Robinson
core   +2 more sources

TheJ‐ andK‐Band Brightness of the Solar F Corona Observed during the Solar Eclipse on 1998 February 26

open access: yesThe Astrophysical Journal, 2002
We analyze J- and K-band observations of the 1998 solar eclipse and derive the F-corona brightness in the K band between 3 and 7 R☉ from the center of the Sun and in the J band out to 5 R☉. The falloff in the K-band brightness from 3 to 7 R☉ is fitted with a radial power law with exponent -2.4 ± 0.1 at the solar equator and with exponent -2.9 at the ...
R. Ohgaito   +4 more
openaire   +1 more source

Propagation and damping of MHD waves in the solar atmosphere [PDF]

open access: yes, 2015
Quasi-periodic disturbances have been observed in the outer solar atmosphere for many years. Although first interpreted as upflows (Schrijver et al.
Kiddie, Greg
core   +2 more sources

Near‐Infrared Imaging of H2O2 in Plants With Nanosensors Under Environmentally Changing Conditions

open access: yesAdvanced Materials, EarlyView.
This paper reports a ratiometric nanosensor enabling robust, multivariate detection of stress signals (H2O2) in plants, with high resistance to light fluctuations and mechanical disturbances. Single‐walled carbon nanotubes serve as the sensor, Egyptian Blue nanosheets serve as a stable reference, and plant autofluorescence serves as a label‐free ...
Jiaqi Li   +8 more
wiley   +1 more source

3D Printing of Self‐Healing Polymers by Material Extrusion: A Process‐Centric Review of Setups, Parameters, and Applications

open access: yesAdvanced Robotics Research, EarlyView.
This review highlights recent advances in material extrusion 3D printing of self‐healing polymers, focusing on the interplay between material chemistry, rheology, hardware customization, and process optimization. Filament‐ and ink‐based extrusion strategies, multimaterial architectures, and postprocessing approaches are discussed for applications in ...
Antonio Pavone   +2 more
wiley   +1 more source

Beyond a Technocentric Transition: A Diverse Economies Perspective for Social Justice in Circular Economy Business Models

open access: yesBusiness Strategy and the Environment, EarlyView.
ABSTRACT The circular economy, dominated by capitalocentric, technocentric, and eco‐modernist discourses, risks perpetuating systemic injustice because of its limited consideration of the social and of what is possible. In this article, we examine how social justice can be embedded into circular business models (CBMs)—key drivers of the circular ...
Fernando C. Lit   +3 more
wiley   +1 more source

Evidence of Continuous Reconnection along a Helmet Streamer Current Sheet Observed by WISPR on Parker Solar Probe

open access: yesThe Astrophysical Journal
Parker Solar Probe's second solar encounter from 2019 March 30 to April 11 occurred during a period when the corona had a simple magnetic structure and relatively flat heliospheric current sheet (HCS), which was in the field of view of the Wide-field ...
Paulett C. Liewer   +7 more
doaj   +1 more source

Evolutions of various solar indices around sunspot maximum and sunspot minimum years [PDF]

open access: yesAnnales Geophysicae, 2002
The smoothed monthly sunspot numbers showed that in many solar cycles, (a) during years around sunspot maxima, there was only one prominent maximum, but in some cycles there was a broad plateau. If the beginning and end of these are termed as first
R. P. Kane, R. P. Kane
doaj   +1 more source

Structure‐Polarization‐Function Relationship in Oxide Perovskite for Solar‐To‐Fuel Conversion Challenge

open access: yesEcoEnergy, EarlyView.
Oxide perovskites (ABO3) have emerged as paradigm‐shifting materials for solar energy conversion, uniquely combining ferroelectric polarization, piezoelectric response, and tunable optoelectronic properties. This review comprehensively examines how controlled structural distortions generate built‐in electric fields that overcome ultrafast charge ...
Xu Qian   +6 more
wiley   +1 more source

Spatial magneto-seismology : effect of density stratification on the first harmonic amplitude profile of transversal coronal loop oscillations [PDF]

open access: yes, 2007
Context. The new generation of extreme-ultraviolet (EUV) imagers onboard missions such as the Solar Dynamics Observatory (SDO)and Solar Orbiter (SO) will provide the most accurate spatial measurements of post-flare coronal loop oscillations yet.
Erdélyi, R. (Robertus)   +7 more
core   +1 more source

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