# Key Ideas from #hplusroadmap IRC Discussions

• Participants debated reputation systems extensively, analyzing how PageRank, PGP's web of trust, and other trust metrics could resist manipulation, with consensus that truly sybil-resistant systems remain challenging due to Goodhart's Law and the contextual nature of reputation.

• Space access technologies were discussed, particularly orbital momentum exchange tethers that could dramatically reduce costs by halving the required delta-V, potentially lowering per-person orbital access from $20 million to $200,000.

• Energy transmission methods were compared, including space-based solar power using phased array masers and the theoretical efficiency of dropping materials from orbit, which loses 1/3 to 1/2 of potential energy during atmospheric entry.

• Biohacking technologies were explored, including implantable wireless blood sensors small enough to fit between cells, with discussion of methods to prevent immune system interference through specialized encapsulation techniques.

• Technical details were shared about building a dense plasma focus fusion device, with specific concerns about preventing flashover in capacitor plates, demonstrating the channel's focus on practical DIY advanced technology.

• The group collaborated on improving "paperbot," a tool for extracting academic paper metadata, highlighting the community's interest in developing better tools for scientific knowledge management.

• Alternative energy storage and generation methods were analyzed, comparing Iceland's geothermal potential to jet stream power (estimated between 7.5-1700 TW) and discussing molten-salt fuel cells and metastable helium isotopes.