1. College of Engineering and Computing, University of South Carolina, Columbia, SC, USA
2. School of Computer Science, Carnegie Mellon University, Pittsburgh, PA, USA
3. ITIS Software, Universidad de Málaga, Málaga, Spain
4. Department of Computer Science and Engineering, Texas A&M University, College Station, TX, USA
5. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA