My research focuses on automatic understanding of human behavior using conventional and machine learning techniques to develop smart systems that can understand and react to human behavior. My doctoral research focused on affect detection from language (text and speech).

I also teach classes in Biometrics and Machine Learning, Assured Systems Design and Implementation, and in Encryption and Programming Techniques.

About me

I completed my Ph.D. in engineering science and graduated on August 5th, 2011 from Louisiana State University. I was a graduate student in the LSU Semantic Analysis Lab under the supervision of Dr. Gerald M. Knapp (committee chair). The focus of my research and studies was in information semantic analysis and related technologies. Specifically, my research focused on affect detection from language (text and speech) for use in interactions between humans and computers. This type of research draws on principles from natural language processing, signal processing (for speech), and machine learning. Currently, I am an Assistant Professor of Computer Information Technology at Purdue University Calumet.

Posted by rcalix1 on Jan 11, 2014  •  Comments (0)  • 

Current Projects

Currently, I am working on the following research projects:

  1. Understanding how emotional and psychological factors can be used by machine learning algorithms as input features to understand depression
  2. New HMM Based Models for Anaphora Resolution
  3. Development and Application of New Neural Network and Kernel Based Machine Learning Methods for Cyber Security and Intrusion Detection Systems
  4. Robust NLP Methods for Nominal Entity Recognition in Text

Posted by rcalix1 on Aug 1, 2013  •  Comments (0)  • 

Call for Papers

AI and Cyber Security: Special Track at The 27th International FLAIRS Conference in cooperation with the American Association for Artificial Intelligence, Pensacola Beach, Florida, May 21 - 23, 2014

Posted by rcalix1 on Jul 27, 2013  •  Comments (0)  • 

Refereed Journal Publications

  1. Calix, R. A.; Javadpour, L.; Knapp, G. M.; Detection of Affective States from Text and Speech for Real-time Human Computer Interaction, Human Factors: The Journal of the Human Factors and Ergonomics Society, 2012, Vol. 54, No. 4, 530-545, Link
  2. Calix, R. A.; Knapp, G. M.; Actor Level Emotion Magnitude Prediction in Text and Speech, Springer Multimedia Tools and Applications, Vol. 62, Issue 2, pp. 319-332 (2013),
  3. Calix, R. A., Mallepudi, S., Knapp, G.M., and Nahmens, I.; "Factors that Influence Usage of Knowledge Management by Information Technology Professionals at Institutions of Higher Education", Journal of Management and Engineering Integration, Vol. 3, No. 1, Summer, 2010. Link
  4. Calix, R. A., Mallepudi, S.A., Chen, B., and Knapp, G.M.; , "Emotion Recognition in Text for 3-D Facial Expression Rendering," IEEE Transactions on Multimedia, Vol.12, No.6, pp.544-551, Oct. 2010. doi: 10.1109/TMM.2010.2052026. Link

Refereed Conference Publications

  1. Calix, R. A., and Knapp, G. M.; “Affect Corpus 2.0: An Extension of a Corpus for Actor Level Emotion Magnitude Detection”, In Proceedings of the 2nd ACM Multimedia Systems (MMSys) conference, Feb. 2011, San Jose, California, U.S.A.
  2. Calix, R. A.; Khazaeli, M.; Javadpour, L; Knapp, G.; Dimensionality Reduction and Classification Analysis on the Audio Section of the SEMAINE Database, In Proceedings of the Humaine Association Conference on Affective Computing and Intelligent Interaction (ACII 2011), Memphis, Tennessee, Oct. 9-12, 2011, (Lecture Notes in Computer Science, 2011, Volume 6975/2011, 323-331,), Link
  3. Mallepudi, S. A., Calix, R. A., and Knapp, G. M.; "Material Classification and Automatic Content Enrichment of Images Using Supervised Learning and Knowledge Bases", In Proceedings of the IS&T/SPIE International Conference on Multimedia Content Access: Algorithms and Systems V, January 2011, San Francisco, California.
  4. Calix, R. A.; Emotion Expression 3-D Synthesis From Predicted Emotion Magnitudes, In Proceedings of the 25th Florida Artificial Intelligence Research Society Conference (FLAIRS-25), May 23-25, 2012, Marco Island, Florida, The Association for the Advancement of Artificial Intelligence (AAAI), Link, Download
  5. Calix, R. A.; Javadpour, L.; Khazaeli, M.; Knapp, G. M.; “Automatic Detection of Nominal Entities in Speech for Enriched Content Search”, In Proceedings of the Twenty-Sixth International Florida Artificial Intelligence Research Society Conference (FLAIRS-26), May 22-24, 2013, St. Pete Beach, Florida, USA, Link
  6. O'Day, D.R.; Calix, R.A.; "Text Message Corpus: Applying Natural Language Processing to Mobile Device Forensics", In Proceedings of the 2013 IEEE International Conference on Multimedia and Expo, Special Workshop on Socio-Mobile Media Computing, San Jose, California, July 15-19, 2013, Link
  7. Franz, D.R.; Calix, R.A.; “Semantic Content Enrichment of Sensor Network Data for Environmental Monitoring”, Accepted for publication in the Proceedings of the Twenty-Seventh International Florida Artificial Intelligence Research Society Conference (FLAIRS-27), May 21- 23, 2014, Pensacola Beach, Florida, USA,

Other Refereed Publications

  1. Calix, R.A.; Sankaran, R.; “Feature Ranking and Support Vector Machines Classification Analysis of the NSL- KDD Intrusion Detection Corpus”, poster presentation, short-paper (4 pages), In Proceedings of the Twenty-Sixth International Florida Artificial Intelligence Research Society Conference (FLAIRS-26), May 22-24, 2013, St. Pete Beach, Florida, Link

Posted by rcalix1 on Jan 21, 2014  •  Comments (0)  •