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Particle-in-Cell Simulation of the Parametric Decay Instability of Alfv\'en Waves with Absorbing Boundary Conditions
arXiv:2606.04932v1 Announce Type: new Abstract: The Alfv\'en wave parametric decay instability (PDI) facilitates energy transfer, plasma heating, and turbulence generation in space, astrophysical, and fusion plasmas. Most simulation studies of Alfv\'en wave PDI have focused on kinetic ions under periodic boundary conditions. Here, we present fully kinetic one-dimensional simulations (perpendicular wave-vector $k_\perp=0$) of the Alfv\'en wave PDI at low plasma beta using absorbing boundary...
Radial evolution of Alfv\'en wave Parametric Decay Instability in the near-Sun solar wind: Effects of Temperature Anisotropy
arXiv:2604.22489v3 Announce Type: replace-cross Abstract: Parametric decay instability (PDI) of Alfv\'en wave is thought to play an important role in the dissipation of the large-amplitude Alfv\'en waves and in the heating of magnetized plasmas. Temperature anisotropy is frequently observed by spacecraft, including Parker Solar Probe (PSP), in the near-Sun solar wind, yet its impact on PDI in the near-Sun solar wind has been understudied. We calculate the maximum growth rates of PDI,...
Well-posedness and finite element approximation of the electrostatic shear Alfv\'en wave equations
new Abstract: The aim of this paper is to study the well-posedness and finite element approximation of the electrostatic shear Alfv\'en wave equations, a coupled system of two partial differential equations arising in plasma physics as a simplified sub-model of the drift-reduced Braginskii equations. To this end, anisotropic Sobolev spaces depending on the normalized magnetic field $\b$ are introduced, together with a Poincar\'e-type inequality along the integral curves of $\b$, which holds...
Two killed as US Gulfstream jet crashes in huge fireball en route to Texas
Two killed as US Gulfstream jet crashes in huge fireball en route to Texas Video footage from the Dominican Republic shows the jet scraping along the runway on its rear wheels before the aircraft erupted into flames - Bookmark - CommentsGo to comments Two people were killed when a private jet headed to the U.S. crashed at a Dominican Republic airport in a huge fireball. The U.S.-registered Gulfstream G200 jet had taken off from La Romana International Airport but declared an emergency...
Enormous ship en route to pick up world's largest electric ferry
Heavy-lift vessel Black Marlin headed to Hobart to pick up Incat electric ferry for South America Wed 3 Jun 2026 at 5:33am In short: Heavy-lift transport ship MV Black Marlin is en route from South Africa to Hobart to pick up Incat's new battery-electric powered ferry. The ferry, the world's largest electric-powered vessel, will operate along a route between Argentina and Uruguay.
Stripping U.S. citizenship en masse is harder than Trump vowed
President Trump's vow to revoke citizenship worries immigrant advocates, legal scholars and naturalized Americans — but so far it's proving harder to do than the rhetoric suggests.
Exam fail: Indian students complain en masse about marking errors in key final exams
New digital marking system is aimed at reducing human errors but many students say it has resulted in wrong gradesNational outcry has erupted in India after more than 400,000 students have requested copies of their exam papers and answer sheets amid an outcry over marking errors in the country’s most important school-leaving exams.Within days of the grade 12 exam results being issued, students began reporting marking discrepancies they linked to a new digital marking system. Continue reading...
Exam fail: Indian students complain en masse about marking errors in key final exams
New digital marking system is aimed at reducing human errors but many students say it has resulted in wrong gradesNational outcry has erupted in India after more than 400,000 students have requested copies of their exam papers and answer sheets amid an outcry over marking errors in the country’s most important school-leaving exams.Within days of the grade 12 exam results being issued, students began reporting marking discrepancies they linked to a new digital marking system. Continue reading...