# Summary of #hplusroadmap IRC Log (Jan 20, 2009)

* A DIY experiment demonstrating fresnel prism effects was shared (http://fechner.uni-graz.at/team/kaernbach/prism-adaptation/DIY-experiment.htm), showing practical applications of optical physics.

* A technical insight about proper cord winding technique was discussed for potential inclusion in SKDB (a standard knowledge database), noting that winding cord by turning the drum prevents twisting that causes tangling.

* A technical question was raised about liquid crystal devices functioning as electro-optical phase modulators without polarizers, specifically whether LCD panels could cause destructive interference between laser beams at each pixel.

* A DIY transatlantic UAV (Unmanned Aerial Vehicle) flight project was shared (http://tam.plannet21.com/index.htm), demonstrating amateur aerospace engineering capabilities.

* Discussion of NASA's lunar rover prototype that can drive sideways, highlighting developments in space exploration vehicle technology.