Photos by Ruth J. Katz I raise my baton to alert the orchestra that I am ready to conduct. In my best imposture of Gustavo Dudamel, I cue the woodwinds, then coax in the stringed instruments, and finally, I direct the brass-perching on the precipice and at the ready-to chime in. I punctuate my air-piercing baton-swirling, with a jab toward …