WORKSHOP: Temporal Event Sequence Analysis
EventFlow and CoCo user group meeting

Thursday, May 28, 2015

A workshop of the
32th Human-Computer Interaction Lab Symposium
University of Maryland

Overview and Topics

The growing volumes of temporal data available from sensors, social media sources, Web logs, and medical histories present remarkable opportunities for researchers and policy analysts. Research at HCIL has led to the development of a family of tools for the exploration of temporal event sequences, such as EventFlow to summarize and search event sequence paterns and CoCo - short for Cohort Comparison -- for the comparison of groups of records and their event sequences. This workshop will allow researchers who are using those tools (and others) to share their finding and strategies for data analysis. We anticipate various application domains to be discussed, including the analysis of Electronic Health Record data, activity log analysis, learning analytics, and more. We also welcome discussions of other uses of visual approaches, statistical methods, machine learning, etc. to study temporal patterns in event sequences, where the goals may be to find common patterns, rare events, similar records etc. Topics might also include data cleaning, integration from multiple sources, coping with incomplete or conflicting information, and presentation of result sets.

This workshop will include talks (followed by ample time for discussions) from:

  • HCIL researchers (e.g. our latest work on EventFlow and our newer work on cohort comparison)
  • Users of HCIL tools such as EventFlow (who will be invited to report on their case studies), and
  • Other researchers working on similar topics will be selected to present their work (please contact us if you are interested).

TO PRESENT your work: If you are interested in presenting please submit a short abstract (~ 300 words max). Summarize what you would like to present on the topic of Exploring Temporal Patterns in Electronic Health Record Data, and provide pointers to papers and screen shots as needed.

Submit to Catherine Plaisant at (Deadline: May 1, 2015, Notification: May 8, 2015). If we receive too many requests, we may ask you to bring a poster for presentation during the breaks.

TO PARTICIPATE: Come and join us! The workshop is opened to all (space permitting, so register by mid-may is strongly encouraged).


Questions: Please contact Catherine Plaisant (

Agenda (PDF)

  • 08:15am - Symposium Registration, Breakfast.
  • 09:00am - Symposium Plenary Talks (more information).
  • 11:00am-12:30pm - Workshop: Morning Session
    • Introduction (slides)
          Ben Shneiderman 
              HCIL, University of Maryland
    • 14 Strategies for Sharpening Analytic Focus (abstract | slides | long paper under review)
          Fan Du1, Ben Shneiderman1, Catherine Plaisant1, Sana Malik1, Adam Perer2
              1HCIL, University of Maryland; 2IBM T.J. Watson Research Center
    • Application of EventFlow to Model the Complexity and Continuity of Antipsychotic Use Among Youth (abstract | slides)
          Susan dosReis1, Wendy Camelo Castillo1, James Gardner1, Ming-Hui Tai1,2
              1University of Maryland School of Pharmacy; 2Pharmetrics
    • Management of Co-Morbid Conditions Among Patients Diagnosed with Incident Prostate Cancer
          Eberechukwu Onukwugha 
               University of Maryland School of Pharmacy
  • 1:15pm-3:00pm - Workshop: Afternoon Session I
    • Understanding Temporal Patterns in Hypertensive Drug Therapy (slides)
          Margret Bjarnadottir1, Sana Malik2, Catherine Plaisant2, Eberechukwu Onukwugha3
              1Robert H. Smith School of Business, University of Maryland; 2HCIL, University of Maryland; 3University of Maryland School of Pharmacy
    • Exploring the Effects of mild Traumatic Brain Injuries using Temporal Events (abstract | slides)
          Filip Dabek , Jesus J Caban 
               National Intrepid Center of Excellence, Walter Reed National Military Medical Center
    • High-Volume Hypothesis Testing: Systematic Exploration of Event Sequence Comparisons (abstract | slides)
          Sana Malik1, Catherine Plaisant1, Margret Bjarnadottir2, Eberechukwu Onukwugha3, Ben Shneiderman1
              1HCIL, University of Maryland; 2Robert H. Smith School of Business, University of Maryland; 3University of Maryland School of Pharmacy
    • Learning Analytics with EventFlow and CoCo: Exploring Course Enrollment Pathways to Inform Curriculum Planning (abstract | slides)
          Leah P. Macfadyen 
               Faculty of Arts, University of British Columbia
  • 3:20pm-4:45pm - Workshop: Afternoon Session II
    • Analysis of Activity Logs: Using Visualization to Explain Results of Anomaly Detection (slides)
          Fan Du , Catherine Plaisant , Ben Shneiderman 
               HCIL, University of Maryland
    • (s|qu)eries: Visual Regular Expressions for Querying and Exploring Event Sequences (abstract | slides)
          Emanuel Zgraggen1,2, Steven M. Drucker1, Danyel Fisher1, Robert DeLine1
              1Microsoft Research; 2Brown University
    • Simplified Overviews for Temporal Event Sequences: Designs for Novice and Expert Analysts (abstract | slides)
          Matthew Louis Mauriello , Ben Shneiderman , Fan Du , Sana Malik , Catherine Plaisant 
               HCIL, University of Maryland
    • Wrap-up & Future Directions
  • 05:00pm - Symposium Demos, Posters, Reception.
  • 06:30pm - Symposium ends.


>> A full list of workshop attendees and photos of speakers

Event Logistics

  • Symposium Registration (to be available around April).
  • Accomodations.
  • Directions, Maps, and Parking Information.
  • All activities will take place in CSIC (Computer Science Instruction Center), near the AV Williams bldg / Computer Science department (also near Route 1).
  • Plan enough time for parking.
  • Coffee and light breakfast will be available in the morning during the demos.
  • Lunch will include some vegetarian offerings.

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