Results 41 to 50 of about 1,458 (126)

Canonical quantization of the Gowdy model

, 2014
The family of Gowdy universes with the spatial topology of a three-torus is studied both classically and quantum mechanically. Starting with the Ashtekar formulation of Lorentzian general relativity, we introduce a gauge-fixing procedure to remove almost
Mena Marugán, Guillermo A.
core   +1 more source

Impact of Ions and Radicals on Etch Selectivity and Fluorocarbon Polymerization in the Selective Dry Etching of Si0.7Ge0.3

Plasma Processes and Polymers, Volume 23, Issue 6, June 2026.
Ion screening in CF4 plasma reduces CFx+ ion flux while maintaining radical fluxes, suppressing fluorocarbon polymer accumulation. This enables smooth SiGe etching with selectivity up to 30:1 in multilayer stacks. ABSTRACT Selective etching of Si0.7Ge0.3 was investigated in CF4 inductively coupled plasma using an ion‐screening approach to decouple ion ...
Joosung Kang, Yongjoon Choi, Dongmin Yoon, Jihye Kim, U‐In Chung, Jeonghoon Son, Dae‐Hong Ko   +6 more
wiley   +1 more source

Characterization of Dust in Saturn's Rings Using Cassini Spacecraft Data

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract The dust distribution in Saturn's rings is investigated using dust impacts registered by the Radio and Plasma Wave Science (RPWS) instrument onboard the Cassini spacecraft. Dust impacts, recorded as spiky signals in electric field waveforms, are used to determine profiles of impact rates and amplitudes of spikes during individual equatorial ...
L. Nouzák, S. Ijaz, D. Píša, J. Pavlů, J. Vaverka, F. Němec, J. Šafránková, Z. Němeček   +7 more
wiley   +1 more source

Lorentzian circle as a Lie group and a C ∞ action on Lorentz spaces of two dimension

, 1999
We define a product on Lorentz circle that is similar to Lorentzian inner product. This product is expanded to Lorents space of two dimension. So we have an C{\infty} action of Lorentz circle on Lorents space of two dimension.
Karakaş, B., Gündoğan, H.
core  

On excited states in real-time AdS/CFT [PDF]

, 2019
The Skenderis-van Rees prescription, which allows the calculation of time-ordered correlation functions of local operators in CFT’s using holographic methods is studied and applied for excited states.
Botta Cantcheff, Marcelo Ángel Nicolás, Martínez, Pedro Jorge, Silva, Guillermo Ariel   +2 more
core  

Spacetime Groups

, 2019
A spacetime group is a connected 4-dimensional Lie group G endowed with a left invariant Lorentz metric h and such that the connected component of the isometry group of h is G itself.
Torre, Charles G., Torre, Charles G, Ian Anderson, Charles Torre, Anderson, Ian M.   +4 more
core   +1 more source

Coupled Ionic‐Molecular Release Governed by Dissolution and Diffusion in Multicomponent Bioactive Glass Nanoparticles

International Journal of Applied Ceramic Technology, Volume 23, Issue 3, June 2026.
ABSTRACT Multicomponent mesoporous bioactive glass nanoparticles (MMBGs) were engineered to enable coupled ionic and molecular release for controlled ionic and molecular release applications. The nanoparticles (70SiO2–20CaO–4B2O3–3ZnO–3CuO, mol%) were synthesized via a microemulsion‐assisted sol–gel route, yielding spherical particles (∼560 nm) with ...
Gabriela Colares Ali Ganem, Julian Ticona Chambi, Bianca Marçal Pagan, Silvia Lucia Cuffini, João Henrique Lopes   +4 more
wiley   +1 more source

Spin Crossover around Room Temperature: Effects of Remote Ligand Symmetry Breaking within Jäger‐Type Iron(II) Complexes

Zeitschrift für anorganische und allgemeine Chemie, Volume 652, Issue 8, 25 May 2026.
Remote symmetry breaking in Jäger‐type iron(II) complexes shifts stepwise spin crossover (SCO) profiles to continuous profiles with transition temperatures around room temperature. In a bottom‐up approach, we studied the feedback of slight molecular modifications on the spin crossover (SCO) properties of otherwise structurally conserved iron(II ...
Florian Daumann, Lucie Gottwalt, Phil Köhler, Gerald Hörner, Birgit Weber   +4 more
wiley   +1 more source

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, Volume 28, Issue 10, 20 May 2026.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Raman Spectroscopic Identification of Oxide Phases in a Corroded MgO–Steel Composite Anode Used in Aluminum Molten Salt Electrolysis

Advanced Engineering Materials, Volume 28, Issue 10, 20 May 2026.
Micro‐Raman spectroscopy is applied to characterize corrosion products in a recycled‐based MgO–316L steel composite anode after molten salt electrolysis. A depth‐dependent Fe–O/Fe–Al–O layer sequence of magnetite, hercynite, and an Al‐doped magnetite transition zone is identified.
Felix Drechsler, Serhii Yaroshevskyi, Alexander Adamczyk, Mahnaz Mehdizadehlima, Julia Richter, Cameliu Himcinschi, David Rafaja, Alexandros Charitos, Christos G. Aneziris, Jens Kortus   +9 more
wiley   +1 more source