Hangzhou Dianzi University 2 articles published in JoVE Bioengineering Three-Dimensional Acoustic Assembly Device for Mass Manufacturing of Cell Spheroids Yuecheng Qian1, Xiaoyun Wei1,2, Keke Chen1,2, Mingen Xu1,2 1School of Automation, Hangzhou Dianzi University, 2Key Laboratory of Medical Information and 3D Bioprinting of Zhejiang Province, Hangzhou Dianzi University Cell spheroids have been considered one potential model in the field of biological applications. This article describes protocols for scalably generating cell spheroids using a 3D acoustic assembly device, which provides an efficient method for the robust and rapid fabrication of uniform cell spheroids. Engineering Optimization, Test and Diagnostics of Miniaturized Hall Thrusters Jian W. M. Lim1, Igor Levchenko1,2, Muhammad W. A. B. Rohaizat1, Shiyong Huang1, Luxiang Xu1, Yu Fei Sun1, George C. Potrivitu1, Jen S. Yee1, Roysmond Z. W. Sim1, Youmei Wang3, Svitlana Levchenko1, Kateryna Bazaka2,1, Shuyan Xu1 1Plasma Sources and Applications Centre, National Institute of Education, Nanyang Technological University, 2School of Chemistry, Physics, Mechanical Engineering, Queensland University of Technology, 3Department of Physics, School of Science, Hangzhou Dianzi University Here, we present a protocol to test and optimize space propulsion systems based on miniaturized Hall-type thrusters.