Abstract

Uncover the hidden spatial diversity potential in 2.4 GHz band for indoor Wireless Sensor Networks, Ruoshui Liu

More and more wireless technologies, e.g., Wi-Fi, Bluetooth, and Wireless Sensor Network (WSN), emerge operating in the unlicensed 2.4 GHz ISM band, the shared wireless channel becomes overcrowded. More severe signal degradation in the wireless channel is attributed to the multipath phenomena exhibiting in the environment where WSNs are deployed. In this research talk, I will briefly talk about the investigation of the potential benefit which space diversity could bring to WSNs to combat the degradation introduced by multipath in the indoor environment.

Device Analyzer – Personal Analytics on a Global Scale, Daniel Wagner

Device Analyzer is a platform to automatically collect fine-grained usage statistics from Android devices. After 12 months of building, the application was released on the Android Market earlier this month. Right now more than 460 people from 47 countries are contributing data to what we hope will soon be the most exhaustive dataset of mobile device use.

Building a reliable service for a fragmented environment presented some interesting challenges. I will present some of these challenges and how I overcame them, give examples of the data we are collecting and present perspectives for the future.