- A shared Google spreadsheet was circulated listing low-cost ultrasound BOM (bill of materials) components, including piezo elements, IMU sensors, and driver circuitry for open-source brain-imaging hardware.  
- Participants debated the necessity and pricing of 6-axis vs 9-axis IMUs (accelerometer + gyro ± magnetometer) for 3-D head-tracking in augmented-reality ultrasound overlays, noting that Invensense parts can be sourced ~$3 cheaper in single quantities.  
- Neural-network-based “wav-to-MIDI” transcription was proposed as a test case for applying deep learning to polyphonic audio separation, with OCR of printed sheet music suggested as an easier parallel problem.  
- kanzure posted a rapid-fire digest of recent neurotech literature:  
  – Ethics of exponential life extension via brain preservation (Cerullo, Jet Press).  
  – Comparative tropism of lentivirus (astrocyte-biased) vs AAV (neuron-biased) in primate brain for gene-therapy vectors.  
  – Use of fibronectin intrabodies selected by mRNA display for live labeling of excitatory vs inhibitory synapses.  
  – Software phantoms of the human brain for validating diffusion MRI tractography algorithms.  
  – High-throughput 3-D segmentation tools (RACE pipeline) for automated nuclei and cell-shape extraction in large microscopy volumes.  
  – Protocol for combining optogenetic stimulation with functional MRI (ofMRI) in behaving animals.  
- Open-source diffusion-MRI analysis resources were highlighted: DSI-Studio (C++/Qt, GitHub) and the ISMRM 2015 Tractometer challenge results for benchmarking tractography pipelines.  
- Discussion of synchronous, formally verifiable languages (Esterel, SCADE, Céu) for safety-critical, resource-constrained neurotech firmware concluded that traditional C-like stacks remain more practical for current prototypes.  
- A meta-conversation critiqued the effectiveness of simple tag-based bookmarking for knowledge management, arguing that tags fail to capture nuanced “who knows what” and “who should know what” relationships needed for expert tutoring bots.