# Summary of #hplusroadmap IRC Log (May 23, 2016)

* A paper on topology optimization for structures incorporating preloads ("tensegrity") was shared, exploring structural engineering principles that could be relevant for advanced materials design (http://www.sciencedirect.com/science/article/pii/S0020768305004932).

* Discussion about acoustic levitation included speculation about ultrasound-based hoverboards, with reference to research showing current systems can only lift a few kilograms, and a graph shared by Bruce Drinkwater showing the sound power requirements for levitating larger objects like humans or cars.

* A research paper titled "Chladni Patterns in a Liquid at Microscale" was mentioned, demonstrating how acoustic vibration patterns can be created at microscopic scales in liquids (published in Physical Review Letters).

* A brief mention was made about the existence of a theoretical black market for PhD dissertations, though no details were provided about its operation or purpose.

* A participant expressed the need for a "Jiminy Cricket" type assistant to help motivate them to complete hobby work during free time, highlighting the challenge of maintaining productivity on personal projects.