Results 51 to 60 of about 67,903 (312)

Oblique electron fire hose instability: Particle‐in‐cell simulations [PDF]

Journal of Geophysical Research: Space Physics, 2014
Nonlinear properties of the oblique resonant electron fire hose instability are investigated using two‐dimensional particle‐in‐cell simulations in the Darwin approximation for weak initial growth rates. The weak electron fire hose instability has a self‐destructive nonlinear behavior; it destabilizes a nonpropagating branch which only exists for a ...
Petr Hellinger, Pavel M. Trávníček, Victor K. Decyk, David Schriver   +3 more
openaire   +1 more source

Chameleon sequences reveal structural effects in proteins representing micelle‐like distribution of hydrophobicity

FEBS Open Bio, EarlyView.
Amino acids sequence of two different proteins with the same sequence (chameleon sequence—black boxes) represent in 3D structure of the proteins different secondary structures: HHHH—helical and BBB—Beta‐structural. The chains folded in water environment adopt different III‐order structures in which the chameleon fragments appear to adopt similar status
Irena Roterman, Katarzyna Stapor, Leszek Konieczny, Krzysztof Gądek, Piotr Nowakowski   +4 more
wiley   +1 more source

Multi-parameter Bayesian optimisation of laser-driven ion acceleration in particle-in-cell simulations

New Journal of Physics, 2022
High power laser-driven ion acceleration produces bright beams of energetic ions that have the potential to be applied in a wide range of sectors. The routine generation of optimised and stable ion beam properties is a key challenge for the exploitation ...
E J Dolier, M King, R Wilson, R J Gray, P McKenna   +4 more
doaj   +1 more source

Exon 7 splicing of ERα predicts poor prognosis and increases phenotypic heterogeneity in luminal a subtype breast cancer

FEBS Open Bio, EarlyView.
ERα splice variant ERα∆7 lacks the C‐terminus, and its expression may change phenotypes of breast cancers. Our results showed that ERα∆7 is found in the luminal A subtype, and elevated ERα∆7 levels are linked to improved cell survival with lower proliferation and migration.
Long Wai Tsui, Taobo Hu, Thomson Christian Husein, Wai Hei Shek, Bingrong Chen, Depeng Wang, Shu Wang, Weichuan Yu, Xiaodan Fan, Mengping Long, Toyotaka Ishibashi   +10 more
wiley   +1 more source

Microscopic Processes in Global Relativistic Jets Containing Helical Magnetic Fields

Galaxies, 2016
In the study of relativistic jets one of the key open questions is their interaction with the environment on the microscopic level. Here, we study the initial evolution of both electron–proton ( e − – p + ) and electron–positron ( e ± )
Ken-Ichi Nishikawa, Yosuke Mizuno, Jacek Niemiec, Oleh Kobzar, Martin Pohl, Jose L. Gómez, Ioana Duţan, Asaf Pe’er, Jacob Trier Frederiksen, Åke Nordlund, Athina Meli, Helene Sol, Philip E. Hardee, Dieter H. Hartmann   +13 more
doaj   +1 more source

Particle-in-Cell Simulations of PerpendicularSupernova Shock Fronts [PDF]

, 2015
The origin of cosmic rays was the subject of several studies for over a century. The investigations done within this dissertation are one small step to shed some more light on this mystery. Locating the sources of cosmic rays is not trivial due to the interstellar magnetic field.
openaire   +2 more sources

Recent Progress in Oxide‐Based Na‐Ion Conductors

Advanced Engineering Materials, EarlyView.
Recent advances in oxide‐based sodium‐ion conductors are reviewed, focusing on β/β″‐alumina, NASICON‐type compounds, and Na5YSi4O12‐type (N5) silicates, together with emerging perovskite and layered oxides. Improvements in ionic conductivity, compositional tuning, and processing are highlighted.
Bowei Xun, Jian Wang, Hubertus Rainaldo Arindra, Katsuro Hayashi   +3 more
wiley   +1 more source

Relativistic Jet Simulations of the Weibel Instability in the Slab Model to Cylindrical Jets with Helical Magnetic Fields

Galaxies, 2019
The particle-in-cell (PIC) method was developed to investigate microscopic phenomena, and with the advances in computing power, newly developed codes have been used for several fields, such as astrophysical, magnetospheric, and solar plasmas.
Ken-Ichi Nishikawa, Yosuke Mizuno, Jose L. Gómez, Ioana Duţan, Athina Meli, Jacek Niemiec, Oleh Kobzar, Martin Pohl, Helene Sol, Nicholas MacDonald, Dieter H. Hartmann   +10 more
doaj   +1 more source

Spin-polarized electron beam generation in the colliding-pulse injection scheme

Matter and Radiation at Extremes, 2023
Employing colliding-pulse injection has been shown to enable the generation of high-quality electron beams from laser–plasma accelerators. Here, by using test particle simulations, Hamiltonian analysis, and multidimensional particle-in-cell simulations ...
Zheng Gong, Michael J. Quin, Simon Bohlen, Christoph H. Keitel, Kristjan Põder, Matteo Tamburini   +5 more
doaj   +1 more source

Numerical Investigation of a Dual‐Mode Shape Memory Alloy Stent Enabling Secondary Expansion via Focused Ultrasound: A Potential Strategy for Correcting In‐Stent Restenosis

Advanced Engineering Materials, EarlyView.
This study demonstrates a novel noninvasive strategy to treat in‐stent restenosis using focused ultrasound. A shape memory alloy stent initially expands at body temperature. If restenosis occurs, targeted ultrasound heating thermally actuates the stent, enabling a secondary expansion to reopen the blocked vessel, offering a potential alternative to ...
Stephen Asare, Lucinda Duncan, Josiah Owusu‐Danquah, Brian L. Davis   +3 more
wiley   +1 more source