REGALIA_031_KW.jpg On 3/29/05 in Berkeley (L to R) Robert Birgeneau, Phd., the new chancellor of UC Berekely tries on he academic robes that date back to the medieval era including his yale hood that represents his Phd. and the UC Berkeley robe with three royal blue velvet stripes representing his doctorate in his office at California Hall on the UC campus. Birgeneau will be inaugurated April 15th. Kat Wade/ The Chronicle MANDATORY CREDIT FOR PHOTOG AND SF CHRONICLE/ -MAGS OUT