José R. Ortiz-Ubarri

Associate Professor – Computer Science Department – University of Puerto Rico at Río Piedras

 Refereed Papers:

  • Arce-Nazario, Rafael, Francis Castro, Domingo Gomez-Perez, Oscar Moreno, José Ortiz-Ubarri, Ivelisse Rubio, and Andrew Tirkel. “Multidimensional linear complexity analysis of periodic arrays.” Applicable Algebra in Engineering, Communication and Computing (2019): 1-21.
  • Arce-Nazario, Rafael, Francis N. Castro, and Jose Ortiz-Ubarri. “On the covering radius of some binary cyclic codes.” Advances in Mathematics of Communications 11.2 (2017): 329-338.
  • F. Castro, R. Figueroa, P. Guan, J. Ortiz-Ubarri. Divisibility of exponential sums associated to binomials over Fp.”Contemporary Developments in Finite Fields and Applications (2016): 11
  • J. Ortiz-Ubarri, R. Arce-Nazario, and E. Orozco. “Modules to Teach Parallel and Distributed Computing Using MPI for Python and Disco.” In 2016 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW), pp. 958-962. IEEE, 2016.
  • J. Ortiz-Ubarri, R. Arce-Nazario, I. Rubio, C. Lucena. EIP: Engaging Laboratory Experiences for the Introduction to Programming Course. NSF Envisioning the Future of Undergraduate STEM Education: Research and Practice Symposium.
  • J. Ortiz-Ubarri, Position Paper: Exploring research collaborations between University of Puerto Rico and Brazil. Workshop: Exploring and Strengthening US-Brazil Collaborations in Future Internet Research. Sao Paulo, Brazil 2015.
  • J. Ortiz-Ubarri, H. Ortiz-Zuazaga, A. Maldonado, E. Santos, J. Grullón. Toa: A Web-Based NetFlow Data Network Monitoring System at Scale. Proceedings of the IEEE Big Data Congress, New York, USA, 2015.
  • J. Ortiz-Ubarri.  New families of asymptotically optimal doubly periodic arrays with ideal correlation constraints. Cryptography and Communications(2015): 1-12.
  • E. Orozco, R. Arce-Nazario, J. Ortiz-Ubarri and H. Ortiz-Zuazaga. A Curricular Experience With Parallel Computational Thinking: A Four Years Journey. In Proceedings of EduPDHPC, Denver, Colorado, USA, 2013.
  • J. Ortiz-Ubarri, O. Moreno, A . Tirkel, R. Arce-Nazario, S. Golomb. Algebraic symmetries of generic (m+1) dimensional periodic Costas arrays.  IEEE Transactions on Information Theory 59(2):1076-1081 (2013).
  • R. Arce-Nazario, J. Ortiz-Ubarri. Multidimensional Costas arrays and their enumeration using GPUs and FPGAs. International Journal of Reconfigurable Computing (2012).
  • R. Arce-Nazario, J. Ortiz-Ubarri. Enumeration of Costas Arrays in FPGAs and GPUs. International Conference on ReConFigurable Computing and FPGAs, Cancun, Mexico, 2011.
  • J. Ortiz-Ubarri, O. Moreno, A Tirkel. Three dimensional periodic Optical Orthogonal Code for OCDMA systems. IEEE Proc Information Theory Workshop, Paraty, Brazil, 2011.
  • O. Moreno and J. Ortiz-Ubarri. Group Permutable Constant Weight Codes. IEEE Proc Information Theory Workshop, Dublin, Ireland, 2010.
  • O. Moreno and J. Ortiz-Ubarri. A New Method to Construct Double Periodic Arrays with Optimal Correlation. IEEE Proc Information Theory Workshop, pages 364-368, Taormina, Sicily, 2009.
  • J. Ortiz-Ubarri and O. Moreno. Families Constructions with Unequal Auto- and Cross-Correlation Constraints. IEEE Proc International Symposium on Information Theory, pages 134-138, Seoul, Korea, 2009.
  • O. Moreno and J. Ortiz-Ubarri. Double Periodic with Good Correlation for Applications in Watermarking. IEEE Proc 3rd International Workshop in Signal Design and Its Applications in Communications, pages 214-218, Chengdu, China, 2007.
  • O. Moreno and J. Ortiz-Ubarri. Double Periodic Arrays with Optimal Correlation for Applications in Watermarking. In Sequences, Subsequences, and Consequences, volume LNCS 4893, pages 82-94, Los Angeles, CA, USA, 2007.


Talks and presentations:

  • J. Ortiz-Ubarri, Introduction to Cybersecurity in 80 mins? Residencia Universitaria Torrevista. Dec 20, 2017.
  • Isamar López, J. Ortiz-Ubarri. A Web-based Parallel Coordinates Visualization for Detecting Large-scale Network Attacks. CAHSI within the 29th Annual HENAAC Conference.  October 18-22, 2017.
  • J. de la Cruz, I. Dávila with José Ortiz-Ubarri. A Network Flows Visualization Framework and API for Network Forensics and Analytics in the Web.  FloCon 2017. San Diego, CA. January 2017.
  • J. de la Cruz Natera, Ian Dávila J. Ortiz-Ubarri. A network flows visualization framework and API for network forensics and analytics in the web. ACM Richard Tapia Celebration of Diversity in Computing. Sept. 2016.
  • J. Valles, Ian Dávila J. Ortiz-Ubarri . Algorithms to detect anomalies in network flows based time series data. ACM Richard Tapia Celebration of Diversity in Computing, Sept. 2016.
  • J. de la Cruz Natera, Ian Dávila, J. Ortiz-Ubarri. A network flows visualization framework and API for network forensics and analytics in the web. 37th IEEE Symposium on Security and Privacy. May 2016.
  • J. Valles, I. Dávila, J. Ortiz-Ubarri. Automated Anomaly Detection Within The Toa Network Flow Data Monitoring System. 37th IEEE Symposium on Security and Privacy. May 2016.
  • J. Ortiz-Ubarri.  Cybersecurity: An Intro in 80 minutes. Tech Blast Conference. University of Puerto Rico at Mayagüez. April 2, 2016.
  • José Ortiz-Ubarri, Rafael Arce.  Algebraic Symmetries of Generic Multidimensional Periodic Costas Arrays and
    their importance in the enumeration of Multidimensional Periodic Sonar Arrays. 47th Southeastern International Conference on Combinatorics, Graph Theory & Computing Finite Fields Session 2016. Boca Raton, FL, March 2016.
  • R. Arce-Nazario, F. Castro, J. Ortiz-Ubarri,  I. Rubio, Construction and analysis of multidimensional periodic arrays. SIDIM 2016 and 47-Southeastern Conference on Combinatorics, Graph Theory, and Computing, March 11, 2016.
  • R. Arce-Nazario, J. Ortiz-Ubarri. Multidimensional Periodic Costas Arrays: Enumeration and Symmetries. SIDIM 2016.
  • José Ortiz-Ubarri, Rafael Arce, Humberto Ortiz-Zuazaga. Modules to introduce Cybersecurity knowledge in the CS curriculum, SIDIM 2016, Humacao, PR, March 2016.
  • José Ortiz-Ubarri, ATACK: Academics and Training for the Advancement of Cybersecurity Knowledge, SHILAC 2015, San Juan, PR. November 2015.
  • J. Ortiz-Ubarri, Position Paper: Exploring research collaborations between University of Puerto Rico and Brazil. Workshop: Exploring and Strengthening US-Brazil Collaborations in Future Internet Research. Sao Paulo, Brazil October 2015.
  • J. Ortiz-Ubarri, H. Ortiz-Zuazaga, A. Maldonado, E. Santos, J. Grullón. Toa: A Web-Based NetFlow Data Network Monitoring System at Scale. IEEE Big Data Congress, New York, USA, June 2015.
  • José Ortiz, Rafael Arce and Ivelisse Rubio. EIP: laboratory experiences for the introduction to programming course. Poster. SIDIM 2015. Mayagüez, PR. 27-28/febrero/2015.
  • Luis Albertorio,J. Ortiz-Ubarri. Mobile Malware Intrusion Detection by Deception using the Sensibility Testbed, PRISM 2015, San Juan, Puerto Rico.
  • Gustavo Melendez,J. Ortiz-Ubarri. On the Cross-Correlation of Families of 3D Welch Costas Arrays, PRISM 2015, San Juan, Puerto Rico.
  • José Alfredo Valles and José Ortiz-Ubarri. Automated Anomaly Detection Within The Toa Network Flow Data Monitoring System. CAHSI, September 10-13, 2015, San Juan, PR. 
  • Hector Román, Luis Albertorio, and José Ortiz-Ubarri. Mobile Malware Intrusion Detection by Deception.  CAHSI, September 10-13, 2015, San Juan, PR.
  • Gustavo Melendez, Rafael Melendez and José Ortiz-Ubarri. On the Cross-Correlation of Symmetries of Three-dimensional Periodic Welch Costas Arrays. CAHSI, September 10-13, 2015, San Juan, PR. 
  • J. Ortiz-Ubarri, H. Ortiz-Zuazaga, A. Maldonado, E. Santos, J. Grullón. Toa: A Web-Based NetFlow Data Network Monitoring System. In Proceedings FloCon 2015, Portland Oregon. January 2015.
  • A. Carrasquillo, A. Maldonado, E. Santos, J. Ortiz-Ubarri. Towards a framework for Network-based Malware detection system.  IEEE Symposium in Security and Privacy. San Jose California, May 2014.
  • J. Ortiz-Ubarri, A. Maldonado, E. Santos, J. Grullon, H. Ortiz-Zuazaga.  Toa: a web based NetFlow data network monitoring system. Security BSidesPR, San Juan Puerto Rico, April 2014.
  • A. Maldonado, E. Santos, J. Ortiz-Ubarri, H. Ortiz-Zuazaga. Toa: A web based NetFlow data network monitoring system. SIDIM . Ponce, Puerto Rico, February 2014.
  • J. Ortiz-Ubarri, R. Arce-Nazario. Modules to teach parallel computing using Python and the LittleFe Cluster. Super Computing 2013, Denver, Colorado, November 2013.
  • J. Ortiz-Ubarri, O. Moreno, A. Tirkel, R. Arce-Nazario, S. Golomb. Multidimensional Periodic Arrays, symmetries and their applications. Finite Fields and their Applications, Mathematical Congress of the Americas, Guanajuato, Mexico, August 2013.
  • J. Ortiz-Ubarri. Periodic arrays for security applications. NYU-poly CSAW Summer Research and Training for College Faculty. Brooklyn, NY, July 2013.
  • J. Ortiz-Ubarri. Intrusion detection by deception. NYU-poly CSAW Summer Research and Training for College Faculty. Brooklyn, NY, July 2013.
  • J. Ortiz-Ubarri, O. Moreno, A. Tirkel, R. Arce-Nazario, S. Golomb. Algebraic symmetries of generic (m+1) dimensional periodic Costas arrays. International Workshop on Finite Fields Constructions of Combinatorial Arrays, Florianopolis, Brazil, April 2013.
  • A. Maldonado, G. Ramos,J. Rodriguez,E. Santos, and J. Ortiz-Ubarri. Netflow data visualization framework using custom queries.  6th Computing alliance of hispanic-serving institutions (CAHSI) annual meeting. Seattle, USA, March 2012.
  • T. Laboy, J. Velez, J. Grullon, R. Arce-Nazario,  J. Ortiz-Ubarri. On the Enumeration of Three Dimensional Costas Arrays using GPUs, SACNAS. Seattle, USA, March 2012.
  • T. Laboy, J. Velez, J. Grullon,  J. Ortiz-Ubarri. Enumeración de arreglos de Costas de tres dimensiones, 32nd Puerto Rico Interdisciplinary Scientific Meeting (PRISM). University of Puerto Rico, Carolina, 2012.
  • T. Laboy, J. Velez, J. Grullon,  J. Ortiz-Ubarri. Enumeración de arreglos de Costas de tres dimensiones, XXVII Seminario Interuniversitario de Investigación en Ciencias Matemáticas (SIDIM). University of Puerto Rico, Mayaguez, 2012.
  • A. Maldonado-Sanchez, G. Ramos, J. Rodriguez, E. Santos, and J. Ortiz-Ubarri. Netflow data visualization framework using open source interactive visualization libraries. SACNAS, San Jose, California, USA, 2011.
  • J. Ortiz-Ubarri, O. Moreno, A Tirkel. Three dimensional periodic Optical Orthogonal Code for OCDMA systems. IEEE Proc Information Theory Workshop, Paraty, Brazil, 2011.
  • J. Ortiz-Ubarri, O. Moreno. Symmetries of multi-dimensional periodic arrays. XXVI Seminario Interuniversitario de Investigación en Ciencias Matemáticas (SIDIM). Palmas del Mar Humacao, PR, February 26, 2011
  • J. A. Medina and J. Ortiz -Ubarri, and H. Ortiz-Zuazaga. Creation of virtual network topology and virtual cluster nodes for parallel programming on a single server. XXVI Seminario Interuniversitario de Investigación en Ciencias Matemáticas (SIDIM). Palmas del Mar Humacao, PR, February 26, 2011
  • J. A. Medina Cruz, J. Ortiz Ubarri, and H. Ortiz-Zuazaga.  Automated creation of virtual clusters on a single server for parallel programming education. 5th Computing alliance of hispanic-serving institutions (CAHSI) annual meeting. San Juan, PR, March 2011
  • J. Ortiz-Ubarri, R. Arce. Búsqueda de arreglos de Costas en GPUs y FPGAs, (Searching Costas arrays in GPUs and FPGAs). XXVI Seminario Interuniversitario de Investigación en Ciencias Matemáticas (SIDIM). University of Puerto Rico at Humacao, PR, February 25, 2011
  • O. Moreno and J. Ortiz-Ubarri. Group Permutable Constant Weight Codes. IEEE Proc Information Theory Workshop, Dublin, Ireland, 2010.
  • J. Ortiz-Ubarri. Double periodic sequences in the aerospace industry, Entrepreneurship and Research in the Aerospace Industry, San Juan, Puerto Rico, 2009
  • O. Moreno and J. Ortiz-Ubarri. A New Method to Construct Double Periodic Arrays with Optimal Correlation. IEEE Proc Information Theory Workshop, Taormina, Sicily, 2009
  • J. Ortiz-Ubarri and O. Moreno. Families of Constructions with Unequal Auto- and
    Cross-Correlation Constraints. IEEE Proc International Symposium on Information Theory, Seoul, Korea, 2009.
  • O. Moreno and J. Ortiz-Ubarri. Double Periodic with Good Correlation for Applications in Watermarking. IEEE Proc 3rd International Workshop in Signal Design and Its Applications in Communications, pages 214-218, Chengdu, China, 2007.
  • O. Moreno and J. Ortiz-Ubarri. Double Periodic Arrays with Optimal Correlation for Applications in Watermarking. In Sequences, Subsequences, and Consequences, volume LNCS 4893, pages 82-94, Los Angeles, CA, USA, 2007.
  • J.Ortiz-Ubarri and J. Caban and O. Moreno. PPM for Optical Communications, SIDIM, San German, PR,  2002