Elastic strain, electrical bias, and localized geometric deformations were applied to elliptical whispering-gallery-mode resonators fabricated with lithium niobate. The resultant perturbation of the mode spectrum is highly dependant on the modal indices, resulting in a discretely reconfigurable optical spectrum. Breaking of the spatial degeneracy of the whispering-gallery modes due to perturbat...

Oilgae: Oil from algae http://www.oilgae.com/ Oilgae is devoted to the use of algae to make fuels. It contains information and also serves as a networking forum. Biofuel gallery https://www.biofuelsdatabase.org/wiki/index.php5/ Biofuel_Gallery The biofuels gallery contains a listing of names and chemical structures for compounds known to be important fuels. Links can be followed for further inf...

It is proved that any rectilinear polygon on n vertices, possibly with holes, can be partitioned into at most n 4 rectilinear stars each of size at most 12.

We consider problems of geometric exploration and selfdeployment for simple robots that can only sense the combinatorial (non-metric) features of their surroundings. Even with such a limited sensing, we show that robots can achieve complex geometric reasoning and perform many non-trivial tasks. Specifically, we show that one robot equipped with a single pebble can decide whether the workspace e...