Results 71 to 80 of about 512,842 (292)

Mitigation of electron cloud effects in the FCC-ee collider

EPJ Techniques and Instrumentation, 2022
Electron clouds forming inside the beam vacuum chamber due to photoemission and secondary emission may limit the accelerator performance. Specifically, the electron clouds can blow up the vertical emittance of a positron beam, through a head-tail-type ...
Fatih Yaman, Giovanni Iadarola, Roberto Kersevan, Salim Ogur, Kazuhito Ohmi, Frank Zimmermann, Mikhail Zobov   +6 more
doaj   +1 more source

Tau acetylation at K331 has limited impact on tau pathology in vivo

FEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto, Yukio Matsuba, Mika Takahashi, Takaomi C. Saido   +3 more
wiley   +1 more source

A method of incorporating general relativity in electromagnetic particle-in-cell code

, 2009
An algorithm is presented that incorporates the tensor form of Maxwell's equations in a general relativistic electromagnetic particle-in-cell code. The code simplifies to Schwartzschild space-time for a non-spinning central mass.
Birdsall, Blandford, Blandford, Buneman, Daniel, Dawson, Eastwood, Ferrari, Gisler, Gisler, Hockney, Ken-Ichi Nishikawa, Kerr, Lovelace, Meier, Michael Watson, Mirabel, Misner, Nishikawa, Nishikawa, Piran, Piran, Ray, Stoney, Umeda, Urry, Verboncoeur, Yee   +27 more
core   +1 more source

Coupling of Fluid and Particle-in-Cell Simulations of Ambipolar Plasma Thrusters

Aerospace
Ambipolar plasma thrusters are an appealing technology due to multiple system-related advantages, including propellant flexibility and the absence of electrodes or neutralizer.
Willem van Lynden, Raoul Andriulli, Nabil Souhair, Fabrizio Ponti, Mirko Magarotto   +4 more
doaj   +1 more source

Calpain small subunit homodimerization is robust and calcium‐independent

FEBS Letters, EarlyView.
Calpains dimerize via penta‐EF‐hand (PEF) domains. Using single‐molecule force spectroscopy, we measured the strength and kinetics of PEF–PEF homodimer binding. The interaction is robust, shows a transient conformational step before dissociation, and remains largely insensitive to Ca2+.
Nesha May O. Andoy, Trina Dykstra‐MacPherson, Mathias A. Bell, Peter L. Davies, Ruby May A. Sullan   +4 more
wiley   +1 more source

CPIC: a Curvilinear Particle-In-Cell code for plasma-material interaction studies

, 2013
We describe a new electrostatic Particle-In-Cell (PIC) code in curvilinear geometry called Curvilinear PIC (CPIC). The code models the microscopic (kinetic) evolution of a plasma with the PIC method, coupled with an adaptive computational grid that can ...
Borovsky, Joseph E., Camporeale, Enrico, Delzanno, Gian Luca, MacDonald, Elizabeth A., Moulton, J. David, Thomsen, Michelle F.   +5 more
core   +1 more source

Impact of modified B-splines on particle-in-cell modeling for electron-ion nonlinear dynamics

Cogent Engineering
The present study explores the impact of implementing a third-order B-spline as a kernel function with random modifications in Particle-In-Cell (PIC) simulations for nonlinear electron-ion dynamics.
Gibran Jalil Garnica-Castro, Georgiy Polupan, Oliver Marcel Huerta-Chavez, Omar Lopez-Perez   +3 more
doaj   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

An improved immersed finte element particle-in-cell method for plasma simulation

, 2017
The particle-in-cell (PIC) method has been widely used for plasma simulation, because of its noise-reduction capability and moderate computational cost.
Bai, Jinwei, Cao, Yong, Chu, Yuchuan, Zhang, Xu   +3 more
core   +1 more source

Advances in Design and Fabrication of Micro-Structured Solid Targets for High-Power Laser-Matter Interaction

Photonics
Accelerated particles have multiple applications in materials research, medicine, and the space industry. In contrast to classical particle accelerators, laser-driven acceleration at intensities greater than 1018 W/cm2, currently achieved at TW and PW ...
Florin Jipa, Laura Ionel, Marian Zamfirescu   +2 more
doaj   +1 more source