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#4299 Printed Circuit Board Coil (Magnetic & Antenna)

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#4299 Printed Circuit Board Coil (Magnetic & Antenna) How Printed Circuit Board Motors Are Insanely Efficient https://www.youtube.com/watch?v=b7EbmhvVnrg #4299  Describe a 3-inch PCB etched as a coil. Would this produce an magnetic field? A 3-inch PCB etched as a coil—often referred to as a planar inductor or PCB antenna —is a fascinating intersection of traditional electrical engineering and modern fabrication. Description of the PCB Coil To fit a coil onto a flat, 3-inch square (or circular) substrate, the "winding" is etched as a continuous spiral of copper trace. Geometry: It usually follows a Square , Hexagonal , or Archimedean (circular) spiral pattern. The "Return" Path: Since a coil needs two terminals, one end is at the outer edge of the spiral. The inner end must "jump" back to the outside, which usually requires a via (a hole plated with copper) to a second layer on the back of the board, where a single trace leads back out. Trace Specs...
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#4298 LLM Performance Nvidia DGX Spark

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#4298 LLM Performance Nvidia DGX Spark #4298  Describe the performance of Nemotron 3 Super on an Nvidia DGX Spark Running the NVIDIA Nemotron 3 Super (120B-A12B) on the DGX Spark is a "sweet spot" configuration for local AI development. Because both the model and the hardware were released in late 2025/early 2026 with a focus on FP4 precision , they are architecturally aligned to punch well above their weight class. Here is the performance breakdown for this specific combination: System Performance Overview The DGX Spark is a "desktop supercomputer" powered by the GB10 Grace Blackwell Superchip . When running Nemotron 3 Super in its native NVFP4 (4-bit) format, the performance is optimized for high-throughput reasoning. Metric Performance on DGX Spark (Single Node) Prompt Processing ~2,855 tokens/sec Token Generation ~18–25 tokens/sec (Typical) Time to First Token ~33.4 seconds (128K context) VRAM Usage ~80–90 GB (leaving ~40 GB for KV Cache/Context) Why This Pa...
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#4297 ISS Astronaut Unable to Speak

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#4297 ISS Astronaut Unable to Speak #4297  Why might an astronaut on extended stay on ISS suddenly, but temporarily be unable to speak? An astronaut on the International Space Station (ISS) experiencing a sudden, temporary loss of speech (aphasia or dysphonia) is a serious medical concern that could stem from several environmental or physiological factors unique to microgravity. Here are the most likely scientific explanations: 1. Transient Ischemic Attack (TIA) Often called a "mini-stroke," a TIA occurs when blood flow to a part of the brain is temporarily blocked. The Space Connection: Microgravity causes a cephalad fluid shift , where blood and interstitial fluids move toward the head. This can alter cerebral blood flow and increase the risk of stagnant blood flow in the internal jugular vein, which has been documented in ISS crew members and could potentially lead to small clots. 2. Space Adaptation Syndrome (SAS) and "Space Fog" During the initial days or duri...
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