Curriculum Vitae

Gonzalo Martinez is currently a 4th year PhD student at the University of Notre Dame, working under supervision of Prof. Aaron Striegel.

Publications

  • Kumar, S., Martinez, G. J., Mirjafari, S., Mattingly, S. M., Wang, W., Audia, P., Striegel, A. D., Campbell, A., Commuting Behavior As A Predictor For Trait Anxiety: A Mobile Sensing Approach, (Under Review – Submitted to CSCW’20)
  • Lin, S., Wu, X., Martinez, G. J., Filling Missing Values on Wearable-Sensory Time Series Data, SIAM International Conference on Data Mining (SDM20) – In Press
  • Martinez, G. J., Mattingly, S. M., Young, J., Faust. L, Dey, A., Campbell, A., Choudhury, M., Mirjafari, S., Nepal, S., Robles-Granda, P., Saha, K., Striegel, A. D., Improved Sleep Detection Through the Fusion of Phone Agent and Wearable Data Streams, Wristsense 2020 – In Press
  • Martinez, G. J., Mattingly, S. M., Mirjafari, S., Nepal, S., Campbell, A., Dey, A., Striegel, A. D., On the Quality of Real-world Wearable Data in a Longitudinal Study of Information Workers, Wristsense 2020 – In Press
  • Das Swain, V., Saha, K., Rajvanshy, H., Sirigiri, A., Gregg, J. M., Lin, S., Martinez G. J., … & Nepal, S. (2019). A Multisensor Person-Centered Approach to Understand the Role of Daily Activities in Job Performance with Organizational Personas. Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, 3(4), 1-27.
  • Saha, K., Reddy, M. D., Swain, V. D., Gregg, J. M., Grover, T., Lin, S., Martinez, G. J., Mattingly, S. M. & Nies, K. Imputing Missing Social Media Data Stream in Multisensor Studies of Human Behavior. linguistic analysis, 19(29), 43.
  • Mirjafari, S., Masaba, K., Grover, T., Wang, W., Audia, P., Campbell, A. T., …, Martinez, G. J. , … & D’Mello, S. K. (2019). Differentiating Higher and Lower Job Performers in the Workplace Using Mobile Sensing. Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, 3(2), 37.
  • Saha, K., Bayraktaroglu, A. E., Campbell, A. T., Chawla, N. V., De Choudhury, M., D’Mello, S. K., …, Martinez, G. J. , …, & Mark, G. (2019, April). Social media as a passive sensor in longitudinal studies of human behavior and wellbeing. In Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems (p. CS12). ACM.
  • Mattingly, S. M., Gregg, J. M., Audia, P…, Martinez, G. J. , … & Gao, G. (2019, April). The Tesserae Project: Large-Scale, Longitudinal, In Situ, Multimodal Sensing of Information Workers. In Extended Abstracts of the 2019 CHI Conference on Human Factors in Computing Systems (p. CS11). ACM.
  • Kleber, N., Termos, A., Martinez, G., Merritt, J., Hochwald, B., Chisum, J., … & Laneman, J. N. (2017, March). RadioHound: A pervasive sensing platform for sub-6 GHz dynamic spectrum monitoring. In 2017 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) (pp. 1-2). IEEE.
  • Martınez, G. J., & Val, L. (2015). Capataz: a framework for distributing algorithms via the World Wide Web. CLEI electronic journal, 18(08).
  • Martínez, G., & Val, L. (2014, September). Implementing crossplatform distributed algorithms using standard web technologies. In 2014 XL Latin American Computing Conference (CLEI) (pp. 1-8). IEEE.

Research and Teaching Experience

University of Notre Dame

Research Assistant, Computer Science and Engineering

  • Produced backend and mobile systems to support everyday operation of the Tesserae study, such as data collection, compliance computations, and participant communications.
  • Designed the database schema with 100+ tables and 4TB in size. Parsed all data that is being used across 5 Universities in the Tesserae study for analysis.
  • The Tesserae study is a year-long study of 750 participants where we use a combination of sensors and social media data to understand the behaviors that support good workplace performance.
  • Analyzed compliance data, patterns of use of wearable technology, sleep data directly captured by a wearable, and the fusion of multiple sensors for more accurate sleep readings.
  • Built a mobile application and gathered mobile network data using a Low Altitude Unmanned Aircraft Vehicle for the Drone Sounder project. Analyzed the results, produced a research paper (currently in editing), and an open-source dataset to be made public at the time of publishing.
  • Created a prototype server backend and frontend for the Radiohound project, a custom spectrum sensing network capable of tuning from 25 MHz to 6 GHz, which covers nearly all widely-deployed wireless activity. The backend and frontend enabled us to see the data as it was coming in from the hardware sensors developed at ND in a close to real-time manner.

Universidad Catolica del Uruguay (2013 – 2016)

  • Worked on the implementation of a framework for distributing algorithms using standard web technologies that resulted in two research papers in a top CS conference in Latin America.
  • Lectured in the Object-Oriented Programming course. Was also a teaching assistant helping implement Team Based Learning methodology in Data Structures and Algorithms, Artificial Intelligence, and Functional Programming.

Professional Experience

Full Stack Software Developer, Web department, Decemberlabs (Jan 2016 – Aug 2016)

  • Developed the backend and frontend of multiple web-based applications, as well as maintained and upgraded the backend of mobile applications for startups in the United States, resulting in ambitious projects being completed on time and on budget.
  • The technology stack included MySQL, Yii, Laravel, Angular JS, HTML+CSS.

Senior Java Developer, Lithium Software (Oct 2013 – Feb 2016)

  • Developed in-house applications for our client El Correo Uruguayo (post office of Uruguay).
  • Upgraded and consolidated tracking applications in the agency by replacing several satellite applications with a web-based centralized server running on J2EE technology.

Web Developer, Freelance, (Apr 2008 – Aug 2016)

  • Development of http://cotizadorlogistico.com (04/2015 – 08/2016)
  • Development and maintenance of 15 different websites and an elementary school management system for my client RedTotal (04/2008 – 06/2010) .
  • Academic Management System for Instituto Crandon – (06/2012 – 08/2016). As part of a three people team, developed and maintained a Java Web Application to substitute paper-based processes, i.e. creation, editing and validation of grades reports, creation of Ministry of Education required documentation, etc. Tasks developed included requirements analysis, development, documentation development and training employees in the use of the system developed. Technologies used during the project: Java, Git, Tomcat, Hibernate, Vaadin Framework, Eclipse IDE, MySQL running on top of an Ubuntu Server 2012 virtual machine.