PDI
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Related Articles from SNS
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,...
Dual-Integrated Low-Latency Single-Lens Infrared Computational Imaging for Object Detection
Announce Type: replace Abstract: Computational imaging enables compact infrared systems, but deep-learning pipelines that combine image reconstruction and object detection often introduce substantial inference latency. Most existing acceleration strategies compress the reconstruction network while overlooking physical priors from the optical path, leaving a trade-off between accuracy and speed. We present Physics-aware Dual-Integrated Network (PDI-Net), a low-latency framework that...
Dual-Integrated Low-Latency Single-Lens Infrared Computational Imaging for Object Detection
Announce Type: replace-cross Abstract: Computational imaging enables compact infrared systems, but deep-learning pipelines that combine image reconstruction and object detection often introduce substantial inference latency. Most existing acceleration strategies compress the reconstruction network while overlooking physical priors from the optical path, leaving a trade-off between accuracy and speed. We present Physics-aware Dual-Integrated Network (PDI-Net), a low-latency framework that...
Evidence Over Plans: Online Trajectory Verification for Skill Distillation
Announce Type: replace Abstract: Agent skills can remarkably improve task success rates by using human-written procedural documents, but their quality is difficult to assess without environment-grounded verification. Existing skill generation methods heavily rely on preference logs rather than direct environment interaction, often yielding negligible or even degraded gains. We identify that it is a fundamental timing bottleneck: robust skills should be posterior-based, distilled from...
'The Arrival' at 30: Charlie Sheen’s criminally underrated alien invasion thriller feels much scarier today
'The Arrival' at 30: Charlie Sheen’s criminally underrated alien invasion thriller feels much scarier today The science fiction film trope of the passionate astronomer monitoring radio telescopes in search of transmissions from an extraterrestrial intelligence, then actually hearing one, seems cliché today after decades of overuse. Surprisingly, its origins actually aren’t that old. It can be traced to 1996’s "The Arrival," which happens to be marking its 30th anniversary today.