# Key Points from IRC Discussions

• JayDugger analyzed Microsoft Kinect's limitations, particularly the lack of tactile feedback, and proposed improvements like wireless vibrating accessories while suggesting applications beyond gaming in ergonomics, choreography, physical therapy, and CAD design testing.

• Participants discussed ultrasound brain stimulation technology, sharing research on remote neural stimulation and noting that low-cost versions (around $200) had been created by graduate students using pig skin for testing, with questions about self-experimentation.

• Fenn reported a self-experiment where consuming 4 tablespoons of butter improved his reaction time on simple math problems by approximately 30%, prompting discussion about potential mechanisms.

• The group debated SCADA (Supervisory Control and Data Acquisition) security vulnerabilities in critical infrastructure like water treatment plants, expressing concern about the industry's apparent resistance to security enhancement proposals.

• A philosophical comparison emerged between nanotechnology and alchemy, suggesting both involve speculation about what would be possible with precise positional control of atoms or philosophical mercury, respectively.

• Extensive discussion of RepRap 3D printer materials and alternative fabrication methods occurred, covering ceramic extrusion, robocasting, glass extruders, supersaturated sugar solutions, and bacterial solutions that can fuse sand into concrete-like materials.

• Participants debated competition design parameters, including whether to set a $200 materials cost limit (excluding shipping) or to reward the lowest-cost functional design by a deadline.