New processes are proposed for preparation of novel, highly reactive, renewable substrate oxetane polymers, making it possible to use cationic oxetane photopolymerizations in many high-speed coatings, printing inks, adhesives, as well as in additive manufacturing processes such as stereolithography, digital imaging and in ink-jet printing. Specifically, an epoxide accelerant, such as 2,2-substituted epoxide, 2,2,3-substituted epoxide, 2,2,3,3-substituted epoxide, and mixtures thereof, is reacted with one or more equivalents of a 3-monosubstituted oxetane or a 3,3-disubstituted oxetane.

Researchers at Rensselaer created a robotic assistant that is more versatile, cheaper, and which can be remotely controllable by anyone whose mobility is impaired. The disclosed robotic assistant generally comprises a motorized base and dual arm robot mounted thereon. The robotic assistant is designed to be utilized by mobility impaired individuals through a sip-and-blow interface, tongue command device, eye/blink tracker, a joystick, etc., to, e.g., command the motion of the assistant to pick up objects from floor or shelf, to inspect suspicious noise, etc.