Results 51 to 60 of about 2,068 (173)

Aplikasi Aljabar Geometris Pada Teori Elektrodinamika Klasik

Jurnal Fourier, 2012
In this paper geometric algebra and its aplication in the theory of classical electrodynamic will  be studied. Geometric algebra provide many simplification and new insight in the theoretical formulation and physical aplication of theory.
Joko Purwanto
doaj   +1 more source

Inverse Drexhage Effect in Epsilon‐Near‐Zero Substrates

Nanophotonics, Volume 15, Issue 15, 13 August 2026.
Radiative emission of dipoles near substrates is shown to reverse between (a) perfect electric conductors and (b) epsilon‐near‐zero (ENZ) media. The schematic highlights switch from vertical to horizontal dipole dominance, governed by interference with image dipoles, leading to directional emission into the upper half‐space and enabling new strategies ...
Sandeep Kumar Chamoli, Mohamed ElKabbash
wiley   +1 more source

Variability of dB/dt in the African Sector During Solar Cycle 24—Implications for Geomagnetically Induced Currents

Space Weather, Volume 24, Issue 8, August 2026.
Abstract This paper quantitatively characterizes dB/dt peaks at four African equatorial‐ and low‐latitude stations, along latitudinal and local‐time gradients across different phases of selected geomagnetic storms. We investigate dB/dt response for intense geomagnetic storms, Dst ≤ −100 nT observed during solar cycle 24 over four stations in the ...
Wuraola E. Oyegunle, C. M. Ngwira, A. O. Akala, E. O. Oyeyemi, B. Olugbon, O. J. Oyedokun, P. O. Amaechi   +6 more
wiley   +1 more source

Controlling of the F Region Plasma Structures by the E Region Conductance in the Auroral Ionosphere

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract At high latitudes, the E and F regions of the ionosphere are strongly coupled through nearly vertical magnetic field lines. To simultaneously and directly relate the E and F regions' plasma structures, we ran a coordinated conjunction campaign between Swarm satellites and Incoherent Scatter Radar in Tromsø, Norway, during a moderate ...
Yaqi Jin, Magnus F. Ivarsen, Lei Cai, Heikki Vanhamäki, Ilkka Virtanen, Daria Kotova, Luca Spogli, Jaroslav Urbář, Alan Wood, Marcus Pedersen, Anita Aikio, Elisabetta Iorfida, Wojciech J. Miloch   +12 more
wiley   +1 more source

Enhancement of Dayside Westward Electrojet: Triggering Conditions and Current Closures

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Geomagnetic substorms are a major path for energy storage and release in the magnetosphere, which typically occur in the midnight sector with a strong enhancement of westward electrojets. However, by analyzing 37,940 events from a substorm list, about 3% of events unexpectedly initiated in the noon sector.
Haobo Fu, Chao Yue, Dedong Wang, Qiugang Zong, Huiting Feng, Yuri Shprits   +5 more
wiley   +1 more source

TRACERS Small‐Scale Field‐Aligned Currents and Intense GPS Amplitude and Phase Scintillations in the Nightside Auroral Region

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract We present conjugate observations of ionospheric small‐scale magnetic perturbations (dB) $(dB)$ and GPS scintillations from the Tandem Reconnection and Cusp Electrodynamics Reconnaissance Satellites (TRACERS) and the Canadian High Arctic Ionospheric Network (CHAIN) during a storm‐time substorm on 9 August 2025 in the nightside auroral region ...
Yangyang Shen, Robert J. Strangeway, Hao Cao, James M. Weygand, Jiashu Wu, Anthony McCaffrey, P. T. Jayachandran, Daniel Billett, Magnus F. Ivarsen, Christopher Watson, Sheng Tian, Marit Oieroset, David Miles   +12 more
wiley   +1 more source

Classical electrodynamics in a space with spin noncommutativity of coordinates

Physics Letters B, 2016
We propose a relativistic Lorentz-invariant spin-noncommutative algebra. Using the Weyl ordering of noncommutative position operators, we find a mapping from a space of commutative functions into space of noncommutative functions.
V.M. Vasyuta, V.M. Tkachuk
doaj   +1 more source

Overcoming Computational Bottlenecks in Quantum Hydrodynamics: A Volume‐Based Integral Formalism for Spherical Nanoparticles

Nanophotonics, Volume 15, Issue 13, 13 July 2026.
Numerical modeling of mesoscopic material response models that capture the quantum dynamics of electrons does not have to come with discouraging computational bottlenecks. The main message is that through a shift in perspective in modeling toward integral equation methods and exploiting symmetry‐based arguments, it is possible to capture complicated ...
Christos Mystilidis, Christos Tserkezis, Guy A. E. Vandenbosch, N. Asger Mortensen, Xuezhi Zheng   +4 more
wiley   +1 more source

A proposed measurement of optical orbital and spin angular momentum and its implications for photon angular momentum

Physics Letters B, 2018
The expression for the total angular momentum carried by a laser optical vortex beam, splits, in the paraxial approximation, into two terms which seem to represent orbital and spin angular momentum respectively.
Elliot Leader
doaj   +1 more source

Femtosecond‐Laser Mould Texturing Enables Tunable Biointerfaces in COC Microfluidics

Advanced Materials Interfaces, Volume 13, Issue 13, 7 July 2026.
Femtosecond‐laser texturing of injection‐mould inserts enables scalable engineering of biointerfaces in cyclic olefin copolymer microfluidics. Replicated micro‐ and nano‐topographies modulate surface roughness and wettability, leading to texture‐dependent protein adsorption and cell adhesion without chemical post‐processing.
Irene Varela‐Leniz, Nora Larreategi, Laura Gemini, Taieb Bakouche, Florent Husson, Leire Gartzia‐Rivero, Eider Bilbao Castellanos, Ane Miren Zaldua, José Luis Vilas‐Vilela, Leire Etxeberria   +9 more
wiley   +1 more source