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Daily bookmarks: relevant news, facts and discoveries.

Engineering

QuadRF tracks drones and detects Wi-Fi

Published on July 10, 2026, Jeff Geerling’s account presents QuadRF, a phased-array radio built with a Raspberry Pi 5 and an FPGA board. It uses signal processing and beamforming to track drones and detect Wi-Fi through walls.

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Engineering

Asynchronous RL rollouts for agentic training

Published on July 9, 2026, the article discusses asynchronous RL for language-model post-training, with updates as rollouts arrive. It cites clipping adjustments in GLM 5.2 PPO and also points to VAPO.

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Engineering

NapMem explores long-term memory for agents

Published on July 8, 2026, NapMem organizes user history into memory layers and trains an agent to choose which layer to inspect. The proposal contrasts with relying only on evidence preselected by a retriever.

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Engineering

What theory reveals about MaxSim

Published on July 8, 2026, the article examines MaxSim’s representational power and reports that it can exactly reproduce inner products between nonnegative k-sparse vectors.

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