Results 21 to 30 of about 30,680 (264)

Heartbeat of the sun from principal component analysis and prediction of solar activity on a millenium timescale [PDF]

, 2015
We derive two principal components (PCs) of temporal magnetic field variations over the solar cycles 21-24 from full disk magnetograms covering about 39% of data variance, with σ = 0.67. These PCs are attributed to two main magnetic waves travelling from
Shepherd, Simon J., Zharkov, Sergei I., Zharkova, V. V., Zharkov, Sergei, Popova, E., Shepherd, S. J., Zharkova, Valentina, Shepherd, Simon, Zharkov, S. I., Popova, Elena, Zharkova, Valentina V.   +10 more
core   +1 more source

Assessing electron heat flux dropouts as signatures of magnetic field line disconnection from the Sun

, 2005
Suprathermal electrons focused along magnetic field lines, called the strahl, carry heat flux away from the Sun. Various factors can cause heat flux dropouts (HFDs), including times when the strahl almost vanishes.
Larson, DE, D. E. Larson, C. Pagel, Crooker, NU, Pagel, C, N. U. Crooker   +5 more
core   +1 more source

Magnetic Fields and Supergranule Velocity Fields on the Quiet Sun [PDF]

, 1988
I have carried out detailed study on the quiet sun magnetic fields and super-granule velocity fields. This thesis consists of 6 themes. 1. I studied the statistical properties of quiet sun magnetic fields, including size distribution, evolution, flux ...
Wang, Haimin
core   +1 more source

The magnetic fields, activity and hidden companions of solar-type stars [PDF]

, 2023
The magnetic fields of the Sun and other solar-type stars manifest in a range of observable surface phenomena that provide insight into the magnetic dynamos operating within, but also hamper the detection of exoplanets.
Brown, Emma
core   +1 more source

The internal magnetic field of the Sun [PDF]

Monthly Notices of the Royal Astronomical Society, 1987
On essaie de placer des limites a la taille des composantes a echelle moyenne ou large du champ magnetique dans l'interieur radiatif du ...
openaire   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

Advanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele, Hossein Ipakchi, Tizazu H. Mekonnen   +2 more
wiley   +1 more source

Biomass Native Structure Into Functional Carbon‐Based Catalysts for Fenton‐Like Reactions

Advanced Functional Materials, EarlyView.
This study indicates that eight biomasses with 2D flaky and 1D acicular structures influence surface O types, morphology, defects, N doping, sp2 C, and Co nanoparticles loading in three series of carbon, N‐doped carbon, and cobalt/graphitic carbon. This work identifies how these structural factors impact catalytic pathways, enhancing selective electron
Wenjie Tian, Jingkai Lin, Zhihao Tian, Selusiwe Ncube, Huayang Zhang, Emiliano Cortés, Hongqi Sun, Shaobin Wang   +7 more
wiley   +1 more source

Multimodal Soft Surgical Robots Enabled by Eco‐Degradable, Sterilizable Polymers and Transient Electronics

Advanced Functional Materials, EarlyView.
A compostable PGS soft surgical robot with interchangeable modules integrates transient Mo tactile and Si thermal sensors for dual feedback. The device preserves its function after clinical‐grade sterilization, demonstrates stable actuation and cardiac tissue grasping with real‐time in vivo pulsatile monitoring, and biodegrades post‐use with soil‐safe, 
Minseong Chae, Kyung‐Sub Kim, Gyeong‐Seok Hwang, Jun‐Seok Shim, Sung‐Woo Kim, Yong‐Wu Kim, Jieun Han, Jae‐Young Bae, Jae‐Hwan Lee, Minjung Chae, Jooik Jeon, Joo‐Hyeon Park, You‐Jung Park, Ju‐Yong Lee, Sung‐Geun Choi, Min‐Ha Oh, Yong‐Joong Shin, Young‐In Ryu, Ji‐Woo Gu, Seong‐Yu Choi, Jeong‐Yun Sun, Jung Keun Hyun, Myoung‐Ryul Ok, Sang Yup Kim, Edyta Wyszkowska, Ju‐Young Kim, Kang‐Sik Lee, Seung‐Kyun Kang   +27 more
wiley   +1 more source

Cyclic Olefin Copolymers as Versatile Materials for Advanced Engineering Applications

Advanced Functional Materials, EarlyView.
Cyclic olefin copolymers (COCs) are presented as highly versatile materials combining tunable synthesis, excellent optical properties, and mechanical robustness. Their potential spans microfluidics, bioengineering, and advanced electronics, while emerging self‐healing and sustainable solutions highlight future opportunities.
Giulia Fredi, Norma Mallegni, Andrea Dorigato, Mario Milazzo   +3 more
wiley   +1 more source

Magnetic fields on young, moderately rotating Sun-like stars - II. EK Draconis (HD 129333)

, 2017
The magnetic fields, activity and dynamos of young solar-type stars can be empirically studied using time series of spectropolarimetric observations and tomographic imaging techniques such as Doppler imaging and Zeeman-Doppler imaging.
Morin, J., Waite, I. A., Jeffers, Sandra V., Carter, Brad D., Morin, Julien, Donati, J.-F., Vidotto, A. A., Marsden, S. C., Petit, P., Jeffers, S. V., Carter, B. D.   +10 more
core   +1 more source