Ibaraki University 2 articles published in JoVE Environment Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera Hiroshi Muraishi1, Ryoji Enomoto2, Hideaki Katagiri3, Mika Kagaya4, Takara Watanabe5, Naofumi Narita3, Daisuke Kano5 1School of Allied Health Sciences, Kitasato University, 2Institute for Cosmic Ray Research, University of Tokyo, 3College of Science, Ibaraki University, 4National Institute of Technology, Sendai College, 5National Cancer Center Hospital East We present experimental protocols for visualizing various low-level gamma radiation sources in the ambient environment using a low-cost, high-sensitivity, omnidirectional, gamma-ray imaging Compton camera. Behavior A Mouse Model of Subchronic and Mild Social Defeat Stress for Understanding Stress-induced Behavioral and Physiological Deficits Tatsuhiko Goto1,2, Atsushi Toyoda1,2,3 1College of Agriculture, Ibaraki University, 2Cooperation between Agriculture and Medical Science, Ibaraki University, 3United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology Here, methods for developing a mouse model of subchronic and mild social defeat stress are described and used to investigate the pathogenic features of depression including hyperphagia- and polydipsia-like symptoms following increased body weight.