1) AT&T Shannon Laboratories, Florham Park, NJ 
Date: May 2001
Topic: Steerable Filter Banks and Lie Theory

2) AT&T Shannon Laboratories, Florham Park, NJ 
Date: August 2001
Topic: Periodic Quantizers based on Lattice Intersections

3) University of California, San Diego, CA 
Date: March 2002
Topic: Quantization Design for Structured Overcomplete Expansions

4) University of British Columbia, Vancouver, Canada 
Date: April 2002
Topic: Structured Overcomplete Expansions: Quantization and Applications

5) California Institute of Technology (CalTech)- Jet Propulsión Laboratory (NASA), Pasadena, CA
Date: July 2002
Topic: Rotation Invariance and Steerable Filter Banks

6) Swiss Federal Institute of Technology, Lausanne - EPFL 
School of Communications and Computer Sciences
Date: May 2002
Topic: Quantization Design for Structured Overcomplete Expansions

7) Swiss Federal Institute of Technology, Lausanne - EPFL
Biomedical Imaging Group
Institute of Imaging and Applied Optics
Date: April 2003
Topic: Rotation Invariant Features for the Distributed Classification Problem

8) University of California, Los Angeles (UCLA), CA
Dept. of Electrical Engineering
Systems Series Seminars
Date: April 28, 2004
Topic: Distributed Signal Processing and Communications: Correlated Data Gathering and
Physics-Based Sensing

9) University of Southern California, Los Angeles, CA
Dept. of Electrical Engineering-Systems
Date: April 29, 2004
Topic: Distributed Signal Processing and Communications: Correlated Data Gathering and
Physics-Based Sensing

10) Instituto de Optica (CSIC), Madrid, Spain
Image and Vision Department
Date: June 14, 2004
Topic: Research Directions in Signal and Image Processing: Sampling and
Quantization, Distributed processing and Directional Filter Banks.

11) Universitat Pompeu Fabra, Barcelona, Spain
Department of Technologies
Date: April 28, 2005
Topic: Research Directions in Signal Processing and Communications:
Signal Acquisition, Multidimensional Filter Banks and Distributed
processing for Wireless Sensor Networks

12) Deutsche Telekom Laboratories
Date: March 2006
Topic: Self-organized Communications in Wíreless Sensor Networks

14) , European Commission, FP6, ICT Concertation Meeting
Date: May 12, 2006
Topic: Power-efficient Data-Gathering in Wireless Sensor Networks

15) Universidad Carlos III de Madrid
Departamento de Teoría de la señal y Comunicaciones
Date: December 15, 2005
Topic: Obtención y Procesado co-operativos en redes inalámbricas de sensores

16) IEEE International Winter School of Information Theory
Universitat Pompeu Fabra
Date: March 18, 2011
Topic: Gossip Algorithms for In-Network Computation

17) KTH, Sweden
Date: September 20, 2013
Topic: Distributed Subspace Projection in Wireless Sensor Networks using Computational Codes

18) NTNU, Norway
Date: September 10, 2013
Topic: Distributed Subspace Projection based on Computational Codes