Helmuth Trefftz Gómez

Support for all projects in the laboratory.

Undergraduate Studies:

Computer Science, EAFIT University, Medellín, Colombia. 1984.

Posgraduate Studies, master and doctoral:

Ph.D. Electrical and Computer Engineering. Rutgers University - New Jersey, USA. 2002.
M.Sc. Computer Science. Maharishi Internacional University (Iowa, USA). 1986.

Professional Experience and Current Activities:

• Chair of the Computer Science Department. Eafit University. 2006 - Now.
• Professor, Director of the Virtual Reality Laboratory. Eafit University - Medellín, Colombia. 1996 - 1997 and 2002 - Now.
• Research Assistant. Rutgers University. 1998 - 2001.
• Chair of the Computer Science Department, Eafit University. 1996 - 1997.
• Head of the Development and Research Department. MECOsoft. 1992 - 1996.
• Head of the Professional Services Department. UNISYS - Medellín. 1990 - 1992
• Head of the Tecnological Department. SAM Airline. 1988 - 1990.
• Tecnical Support. Suramericana de Seguros.1984 - 1988.
• Programmer. Microtek Corporation. 1986 - 1987.

Graduate Students

• Christian Andrés Díaz León.
Masters thesis: Design and Development of a Virtual Environment for the Simulation of Laparoscopic Surgery, 2009.
• Hamilton Andrés Hernández Alvarado.
Masters thesis: WeSketch: A 3D Real Time Collaborative Virtual Environment that Improves the GUI Sketching Task, 2010.
• Oscar Alonso Vélez Rojas.
Masters thesis: Development and Validation of an Educational Game for learning of English as a Foreign Language, 2011.
• Juan Carlos Monroy Osorio.
Masters thesis: 3D Immersive Virtual Environments with Applications in Education: A Proposal for its Development and New Evaluation Heuristics, 2012.
• Luis Fernando Vélez Rojas.
Masters thesis: Design of a Game for English Teaching: "Brock MIR P.I Adventure", 2012.
• Ricardo de Jesús Botero Tabares.
Masters thesis: The Playful of Games in Oriented Programming Objects Learning: A Prototype in C #, 2012.
• Diego Mauricio Torres.
Masters thesis: A New Way For Learning Languages Through Virtual Immersive Environments, 2012.
• María Lili Villegas Ramírez (co-asesoría con William Joseph Giarldo).
Masters thesis: Methodology for the Development of Usable Interactive Systems CIAF+HCI through the Integration of CIAF and MPIu+a, 2012.
• Juan Fernando Herrera Jaramillo.
Masters thesis: Virtual and Augmented Reality in Education: Case Studies, 2013.
• Maritza Torres Barrero.
Masters thesis: eBlindMail: User Interface to Access Email Addressed to the Blind, 2013.
• Edwin Andrey Duque Loaiza.
Masters thesis: Design of a Natural User Interface for Reduction of Learning curve by users and people with low digital knwoledge When applying for a medical appointment, 2014.
• Juan Gonzalo Cárcamo.
Masters thesis: Collaborative visualization and virtual reality in construction projects, 2014.
• Guillermo León Carmona González.
Masters thesis: Exploration of the Development, Implementation and Evaluation of a Game Serious for the Course Control Operations, 2014.
• Oscar Alonso Vanegas Olarte.
Masters thesis: Experience in Interactive Television to assimilate morals in children from 3 to 5 years, 2014.
• Daniel Fernando Orozco Morales (co-asesoría con William Joseph Giarldo).
Masters thesis: Specifying a metamodel to support and extend the proposed TD-MBUID, 2014.
• Christian Andrés Díaz León.
Ph.D. Thesis: Handling Heterogeneity in Collaborative Networked Virtual Surgical simulators, 2014.

Recent Publications

" Adaptive Architecture to Support Context-Aware Collaborative Networked Virtual Surgical Simulators (CNVSS) " . C. Diaz, H. Trefftz, L. Quintero, D. Acosta and S. Srivastava. In Lectures Notes in Computer Science: Virtual, Augmented and Mixed Reality, Volume 8526, pp. 277-286 (2014).
" Adequacy of An Inmersive Environment as a Teaching-Learning Tool Applying Experimental 3D Limen Method. " . Torres, D. and Trefftz, H. (2014).
" Experiencia en Televisión Interactiva para Asimilar Moralejas en Niños de 3 a 5 Años. " . Vanegas, O. y Trefftz H. In Proceedings of XV Encuentro Internacional Virtual Educa Perú 2014, pp. 1 - 20 (2014).
" Collaborative Networked Virtual Surgical Simulators (CNVSS): Factors Affecting Collaborative Performance " . C. Diaz, H. Trefftz, L. Quintero, D. Acosta and S. Srivastava. In Presence: Teleoperators and Virtual Environments, Vol. 22, No. 1, pp. 54 - 66 (2013).
" Evaluation of Various Strategies to Improve the Training of a Brain Computer Interface System " . L. Jiménez, A. Velásquez and H. Trefftz. In Proceedings of Conference in Modelling, Identification and Control (2013).
" Propuesta de un juego serio de apoyo al curso de programación de producción " . G. Carmona, H. Trefftz. In Proceedings of 10th Latin American and Caribbean Conference for Engineering and Technology (2012).
" An Immersive Virtual Reality Training System for Mechanical Assembly " . A. Peniche, C. Diaz, H. Trefftz and G. Paramo Accepted for publication in The 4th International Conference on Manufacturing Engineering, Quality and Production Systems (MEQAPS '11).
" Parallelizing AES on Multicores and GPUS " . J. Ortega, H. Trefftz and C. Trefftz In Proceedings of IEEE International Conference on Electro/Information Technology, eit 2011, Mankato, MN, USA.
" WeSketch: A 3D Real Time Collaborative Virtual Environment that Improves the GUI Sketching Task " . H. Hernandez and H. Trefftz In Proceedings of 8th International Conference on Information Technology : New Generations ITNG 2011 April 11-13, 2011, Las Vegas, Nevada, USA.
" Design and Implementation of a Low-Cost Projected Virtual Reality System to Support Learning Processes " . R. Gómez, H. Trefftz. HCI International 2011 Posters’ Extended Abstracts, Communications in Computer and Information Science, Stephanidis, Constantine, Springer Berlin Heidelberg, isbn 978-3-642-22095-1, p 107-111, V 174, 2011.
" General algorithms for laparoscopic surgical simulators " . C. Diaz, H. Trefftz, J. Bernal, S. Eliuk. Revista Ingeniería Biomédica, ISSN 1909-9762, volume 4, issue 8, july-december 2010, págs. 57-70 Escuela de Ingeniería de Antioquia-Universidad CES, Medellín, Colombia.
" Simulating Soft Tissue using GPU approach of the Mass-Spring Model " . C. Diaz, S. Eliuk, H. Trefftz and P. Boulanger. In 3IA ‘2010 International Conference on Computer Graphics and Artificial Intelligence, Mayo 2010.
" Simulating Soft Tissue using GPU approach of the Mass-Spring Model " . C. Diaz, S. Eliuk and H. Trefftz. Proceedings of Virtual Reality Conference IEEE 2010, pp. 261--262, ISSN: 1087-8270.
" Asignación dinámica de servidores en ambientes virtuales, usando "octrees" para la partición dinámica del espacio " . A. Restrepo, A. Montoya and H. Trefftz In Avances en Sistemas e Informática, vol. 6, núm. 2, septiembre, 2009, pp. 1-4.
" Development of a Surgical Simulator for Training Laparoscopic Procedures " . C.A. Diaz, D. Posada, H. Trefftz, J. Bernal. In International Journal of Education and Information Technologies, Volume 2, Issue 1, 2008, pp. 95-103.
" Development of a Physical Interface to Interact with a Virtual Laparoscopic Environment " . D. Posada, C.A. Diaz, H. Trefftz, J. Bernal In Proceedings of the Communications and Information Technology 2008 Marathon Beach, Attica, June 1-3, 2008.
" Ensenyanza Remota de Conceptos Anatomicos y Funcionales del Sistema Musculo-Esqueletico (Remote teaching of anatomical and functional concepts of the muscle-skeleton system) " . C.A. Diaz, H. Trefftz, F. Pineda In Proceedings of the IV Latin American Congress on Biomedical Engineering (CLAIB200) Co-Sponsored by: Institute of Electrical & Electronics Engineers (IEEE) Margarita Island, Venezuela, September 24 - 28, 2007.
" Remote Collaboration with Augmented and Virtual Reality Interfaces " . L.E. Cifuentes, E. Berrio, D.E. Newball, H. Trefftz. Published in Proceedings of the The 2007 World Congress in Computer Science, Computer Engineering and Applied Computing (WorldComp 07) Las Vegas, Nevada, USA. June 25-28, 2007.
" Supporting the Learning Process in the Classroom Using 3D Collaboration on Mobile Devices " . J. Trefftz, O. Gómez, P.V. Esteban, J. Trujillo, E. Montoya. Published in the IADIS International Journal On www/Internet December 2006. Vol.4 Issue 2. ISSN 1645-7641.
" Collaborative Virtual Environments for Teaching Physics " . F. Giraldo, A.M. Jimenez, P.V. Esteban, H. Trefftz In Proceedings of the International Joint Conferences on Computer, Information, and Systems Sciences, and Engineering (CISSE 2006) Co-Sponsored by: Institute of Electrical & Electronics Engineers (IEEE) University of Bridgeport, December 4 - 8, 2006.
" Supporting the Learning Process in the Classroom using 3D Collaboration on Mobile Devices " . H. Trefftz, O. Gomez, P.V. Esteban, J. Truillo, E. Montoya In Proceedings of the IADIS International Conference Mobile Learning 2006 Dublin, Ireland, July 14 - 16, 2006.
" Collaborative and Distributed Augmented Reality in Teaching Multi-Variate Calculus " . C. Orozco, P. V. Esteban, H. Trefftz. In Proceedings of the IASTED International Conference on Web based Education (WBE 2006) Puerto Vallarta, Mexico, January 23 - 25, 2006.
" Telepresence Support for Synchronous Distance Education " . J. Restrepo and H. Trefftz In proceedings of the ACM Symposium on Virtual Reality Software and Technology (VRST 2005) Monterey, California, November 7 - 9, 2005.
" Reconstruccion Virtual del Mito Embera de la Creacion del Agua Utilizando Agentes Autonomos " . A. Quiroz, S. Velez, J. Restrepo, H. Trefftz, J.D. Velasquez In Revista Universidad Eafit. Vol. 41 Num 140. October, November, December, 2005. pp 58 - 74.
" Combinatory Multicast for Differentiated Data Transmission in Distributed Virtual Environments " . A. Quiroz, H. Trefftz. In proceedings of the IASTED International Conference on Computer Graphics and Imaging (CGIM 2004) Kawai, Hawaii, August 15 - 17, 2004.
" Adaptive handling of Bandwidth Heterogeneity in Collaborative Virtual Environments " . M. A. Ruiz, J. I. Giraldo, H. Trefftz. In proceedings of the International Conference on Telecommunications and Computer Networks (IADAT-tcn 2004) San Sebastian, December 1 - 3, 2004.
" Augmented Reality: A space for the understanding of Multi-Variate Calculus. " . P. Esteban, J. E. Jaramillo, N. Alvarez, J. Restrepo, H. Trefftz. In proceedings of the International Conference on Education (IADAT-e 2004) Bilbao, Spain, July 7 - 9, 2004.
" Telepresence for Distance Eduaction: Lessons Learned. " . A. Agudelo, L. Escobar, J. Restrepo, C. Zea, H. Trefftz. In proceedings of the International Conference on Education (IADAT-e 2004) Bilbao, Spain, July 7 - 9, 2004.
" A Collaborative Tool for Synchronous Distance Education. " . A. Agudelo, L. Escobar, J. Restrepo, A. Quiroz, H. Trefftz. In proceedings of the The 7th IASTED International Conference on COMPUTERS AND ADVANCED TECHNOLOGY IN EDUCATION (CATE 2004) Kawai, Hawaii, August 16 - 18, 2004.
" Implementacion de una topologia hibrida para el manejo de colisiones en un ambiente de Realidad Virtual (Implementation of a hybrid topology for the handling of collisions in virtual environments) " . D. Alvarez, H. Trefftz. In Revista Universidad Eafit. Vol. 14 Num 136. November, December, 2004.
" Telepresence in Synchronous Distance Education Sessions " . L. Escobar, E. Rendon, J. Restrepo, E. Montoya, C. Zea, H. Trefftz In proceedings of the Second International Conference on Multimedia and ICTs in Education (M-ICTE 2003) ,pp 1070-1074, Badajoz, Spain, December 3-6, 2003.
" Augmented Reality for Teaching Multi-Variate Calculus " . N. Alvarez, J. E. Jaramillo, J. Restrepo, H. Trefftz, P. Esteban In proceedings of the Second International Conference on Multimedia and ICTs in Education (M-ICTE 2003) ,pp 1271-1275, Badajoz, Spain, December 3-6, 2003.
" Area of Interest Management by Grid-Based Discrete Aura Approximations for Distributed Virtual Environments " . Juan E. Jaramillo, Lina Escobar, Helmuth Trefftz In proceedings of the 6th Symposium on Virtual Reality (SVR 2003) ,pp 342-353, Ribeirao Preto, SP - Brazil, October 15-18, 2003.
" Networked Virtual Environments " . Helmuth Trefftz Tutorial in 6th IASTED International Conference on COMPUTERS, GRAPHICS, AND IMAGING (CGIM 2003) Honolulu, Hawaii, August 13-15, 2003.
" Dynamic Server Allocation in Virtual Environments, Using Quadtrees for Dynamic Space Partition " . A. Restrepo, A. Montoya and H. Trefftz In proceedings of IASTED Computer Science and Technology (CST 2003) , pp 364 - 368, Cancún, México, May 19-21, 2003.
" Agents as Tutors in Augmented Reality " . N. Álvarez, H. Trefftz. In proceedings of IASTED Computer Science and Technology (CST 2003) , pp 249 - 252, Cancún, México, May 19-21, 2003.
" Achieving Object Persistence In An Augmented Reality Indoor Environment " . M. D. Gutiérrez, A. M. Márquez, H. Trefftz. In proceedings of IASTED Computer Science and Technology (CST 2003) , pp 259 - 263, Cancún, México, May 19-21, 2003.
"Handling Heterogeneity in Networked Virtual Environments" H. Trefftz, I. Marsic, M. Zyda. In Presence: Teleoperators and Virtual Environments, Volume 12, Number 1, pp 37-51, February 2003.
• "Observations about an Approximate Algorithm for the Point Robot Motion Planning Problem".  C. Trefftz, H. Trefftz.  In Proceedings of the XXII International Conference of the Chilean Computer Science Society.  Copiapó, Atacama, Chile, Novembre 6 - 8, 2002, pp 52 - 55.
"Handling Heterogeneity in Networked Virtual Environments" H. Trefftz, I. Marsic, M. Zyda. In Proceedings of the IEEE Virtual Reality Conference 2002, Orlando, Florida, March 24 - 28, 2002, pp 7 - 14.
"Message Caching for Global and Local Resource Optimization in Shared Virtual Environments" H. Trefftz, I. Marsic. In Virtual Reality Software & Technology VRST 2000 , Seoul, Korea, October 22 - 25, 2000, pp 97 - 102.
"Local and Global Impact of Message Caching in Shared Virtual Environments" H. Trefftz, I. Marsic. In Proceedings of the IASTED International Conference on Computer Graphics and Imaging 2000 (CGIM 2000) Las Vegas, NV, November 19-23, 2000, pp 8 - 13.
"Heteregeneous Collaboration Using XML" I. Marsic, A. Krebs, H. Trefftz, B. Dorohonceanu, M. Tremaine. Submitted to Computer Supported Cooperative Work CSCW 2000 , Philadelphia, Pennsylvania, December 2 - 6, 2000.
"Sharing Viewpoints in Collaborative Virtual Environments" S. Valin, A. Francu, H. Trefftz, I. Marsic. In Proceedings of the 34th Hawaii International Conference on System Sciences (HICSS-34)
"3-D Tracking Calibration of a Polhemus Long Ranger Used with the Baron Barco Workbench" H. Trefftz, G. Burdea. Technical Report CAIP-TR-243. Center for Advanced Information Processing - Rutgers University.
"A Heuristic for the Orthogonal Polygon Art Gallery Problem" C. Trefftz, H. Trefftz, in Eighteenth IASTED International Conference APPLIED INFORMATICS , Innsbruck, Austria, February 14 - 17, 2000.
• "Dexterous Force Feedback in 2-D and 3-D Multimedia" H. Trefftz, G. Popescu, B. Sletterink, G. Burdea. Submitted to IEEE Transactions on Multimedia. August 1999.
• "Multimodal Interaction Modeling". V. Popescu, G. Burdea, H. Trefftz. Chapter 25 in Handbook of Virtual Environment Technology. K. Stanney, Editor.  Lawrence Erlbaum Associates, Mahwah, New Jersey, 2002.
• "Virtual Reality and Distance Learning in Colombia" H. Trefftz, C. Correa, M. A. Gonzalez, J. Restrepo, C. Trefftz, IASTED International Conference COMPUTER GRAPHICS AND IMAGING , Halifax, Nova Scotia - Canada, June 1 - 3, 1998.
"Distance Education and Distributed Virtual Environments" , H. Trefftz, C. Correa, M. A. Gonzalez, G. Imbeau, J. Restrepo, M. I. Velez, C. Trefftz, The Virtual Campus: Trends for Higher Education and Training , Madrid, Spain, November 27 - 29, 1997.

Courses

Undergraduate Courses:
• Formal Languages and Compilers.
• Fundamentals on programming.
• Computer Graphics.
• Networked Virtual Reality.

Postgraduate Courses:
• Human - Computer Interfaces.

Courses that have dictated previously
• Compilers.
• Computer Architecture.

Contact:

htrefftz at-sign eafit.edu.co