The 4th IEEE International Workshop on Practical Issues in Building Sensor Network Applications (SenseApp 2009)

We would like to thank all the people who worked hard to make this workshop a success. First and foremost we would like to express our gratitude to all the members of the Technical Program Committee and the reviewers for their diligent effort in providing high quality reviews in a timely manner. We would also like to thank the LCN 2009 Organizing Committee and the SenseApp 2009 Steering Committee for their help and support. Special thanks are due to Damla Turgut, LCN Workshop Chair and Ehab Elmallah, LCN General Chair for their help and guidance over the past few months. Last but not least, we would like to thank the authors for choosing to submit their publications to SenseApp 2009.