Articles are presented, covering a wide range of topics in the mathematical methods of quantum physics. These include infinite dimensional analysis based on white noise, operator algebra methods, Feynman path integrals, quantum mechanics on non-simply connected spaces, recent results in supersymmetric theories, stochastic and quantum dynamics, Yang-Baxter systems, statistical physics, thermo field dynamics, and quantum field theory.
The essays are based on lectures contributed for the Second Jagna International Workshop held in honour of Prof. Hiroshi Ezawa, a distinguished physicist, educator, and former president of the Physical Society of Japan.

This thesis examines the application of battle command during the 100/442d Regimental Combat Team's rescue of the First Battalion, 141st Infantry Regiment, 36th Infantry Division, the "Lost Battalion." As background, this study presents a brief history of the Japanese in Hawaii and the United States, of the formation and record of the 100/442d RCT, and of the battle to rescue the Lost Battalion. The contemporary concept of battle command is defined as per Army Field Manual 3-0, Operations (June 2001) and Field Manual 22-100, Leadership; Be, Know, Do (August 1999) and shown to encompass the World War II-era concepts of command and leadership. This study examines how the tenets of battle command--visualize, describe, direct--were applied by the 36th Division and the 100/442d RCT during the operation. Specific examples from the battle will illustrate both the use and neglect of the precepts of battle command and illustrate the importance of sound command and leadership techniques as well as the value of unit cohesion in present-day operations