This book constitutes the refereed proceedings of the Workshop on E-Business (WEB 2011), held in Shanghai, China, on December 4, 2011. The 40 papers, which were selected from 88 submissions to the workshop, touch on topics that are diverse yet highly relevant to the challenges faced by today's e-business researchers and practitioners. They are organized in topical sections on social networks, business intelligence, and social computing; economics and organizational implications of electronic markets; and e-business systems and applications.

This book constitutes selected and revised papers from the Second International Conference on Digital Health and Medical Analytics, DHA 2020, held in Beijing, China, in July 25, 2020. The 5 full papers and 7 short papers presented in this volume were thoroughly reviewed and selected from 75 submissions. The papers present discussion on such topics as social networks, analytics and engagement with health devices, big data, public health surveillance, persuasive technologies, epidemic intelligence, participatory surveillance, emergency medicine, serious games for public health interventions and automated early identification of health threats and responses.