Brown Bag Lunch Schedule

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The HCIL has an open, semi-organized weekly "brown bag lunch (BBL)" every Thursday from 12:30-1:30pm in HCIL (2105 Hornbake, South Wing). The topics range from someone's work, current interests in the HCIL, software demos/reviews, study design, proposed research topics, introductions to new people, etc. The BBL is the one hour a week where we all come together--thus, it’s a unique time for HCIL members with unique opportunities to help build collaborations, increase awareness of each other’s activities, and generally just have a bit of fun together. There is no RSVP; simply show up!

If you would like to give or suggest a talk, presentation, workshop, etc., send an email to BBL student co-coordinators Sriram Karthik Badam ( or Pavithra Ramasamy ( In the email, briefly describe the topic and preferred dates.

To be notified about upcoming events, please subscribe one of these mailing lists.

Fall 2017 Schedule

Date Leader Topic

Kickoff to a new Semester!

Come network, make introductions, and share what each of us is working on

Please come to our first BBL of the Fall 2017 semester to introduce yourself and share what you're working on in the coming semester. The first BBL will be for us to network with each other and kickoff a great new semester.


David Weintrop, University of Maryland, College Park

To block or not to block: Understanding the effects of programming language representation in high school computer science classrooms.

Abstract: In the last few years, Chicago, New York City, and San Francisco have all announced major initiatives to bring computer science classes and computational thinking into every high school in their cities - with countless other smaller school districts following suit. Having made these commitments, attention now shifts towards how best to teach computer science to diverse populations of high school students who grew up in the age of smart phones, iPads, and Facebook. An increasingly popular strategy being employed is the use of graphical, block-based programming environments like Scratch, Blockly, and Alice. While these environments have been found to be effective at broadening participation with younger learners, open questions remain about their suitability in high school contexts. In this talk, I will present findings from a two-year classroom study looking at how the design of introductory programming environments affects learners' emerging understandings of computer science concepts and their perceptions of the field of computer science. I will also discuss the affordances of block-based programming environments relative to more conventional text-based alternatives.

Bio:David Weintrop is an Assistant Professor in the Department of Teaching & Learning, Policy & Leadership in the College of Education with a joint appointment in the College of Information Studies at the University of Maryland. His research focuses on the design, implementation, and evaluation of accessible and engaging computational learning environments. He is also interested in the use of technological tools in supporting exploration and expression across diverse contexts including STEM classrooms and informal spaces. His work lies at the intersection of human-computer interaction, design, and the Learning Sciences. David has a Ph.D. in the Learning Sciences from Northwestern University and a B.S. in Computer Science from the University of Michigan. He spent one year as a postdoctoral researcher at the University of Chicago studying computer science learning in elementary classrooms prior to joining the faculty at the University of Maryland. Before starting his academic career, he spent five years working as a software developer at a pair of start-ups in Chicago.


Stacy Branham,
University of Maryland Baltimore-County

From Independence to Interdependence: A Social Narrative of Assistive Technology

Abstract: In the Assistive Technology and greater disabilities community, “independence” has been a core goal and frame for making progress toward equality. This dominant narrative is often interpreted to mean that disabled people can and should live independently without help from others, and that assistive devices exist to displace reliance on helpers. For example, a wearable device that gives a blind person turn-by-turn directions through an airport displaces a sighted human guide. However, my work with people with disabilities in the home, in the workplace, and in public spaces has demonstrated that collaboration is a significant tool and goal of people with disabilities in their everyday lives. Further, social setting and human-human interactions significantly impact whether and how assistive devices are used. In this talk, I will share and unpack stories from people with various abilities to argue that assistive technology design through the lens of “interdependence” provides a more honest, respectful, and empowering alternative for assistive technology design.

Bio: Stacy Branham is a Lecturer in Information Systems at the University of Maryland, Baltimore County (UMBC). Her research in Human-Centered Computing contributes to the subfields of Social Computing and Assistive Technology by investigating how technologies mediate interpersonal relationships, often with people who are blind. Her recent and ongoing studies explore how technology can engender safety as people with disabilities encounter law enforcement at protests, as blind parents care for their children at home, and as transgender people navigate violence in online and offline spaces. Themes she investigates include agency, empowerment, disability, gender, social justice, intimacy, interdependence, personal safety, and ethics in design research. Her research has been recognized with best paper awards at CHI and DIS. Dr. Branham has organized multiple workshops at CSCW and CHI on ethics in design research, culminating in a Special Issue of Interacting with Computers. She is currently a papers AC for CHI 2018 and the Chair of the Student Research Competition for ASSETS 2017. Dr. Branham received her BS and PhD in Computer Science from Virginia Tech, with a specialization in Human-Computer Interaction.


Gabriela Marcu,
Drexel University
Cody Buntain,
University of Maryland, College Park

Gabriela: Addressing health inequities through human-centered design
Cody: Gaining Insight into Real-World Societal Response Using Social Media

Talk 1 - Abstract: When we use empathy and human-centered approaches in developing health interventions, we have the capacity to affect social change. We can direct human-centered computing toward underserved populations. We can target marginalization, stigma, and inequity with human- centered methods. In this talk, I will share projects that have focused on addressing inequities within children’s behavioral health services, treatment for youth living with HIV, and opioid overdose prevention. I will present methodological approaches to designing for and with underserved populations, and show how to practice inclusion and equity in the design process. Based on the results of my projects, I will also outline design principles for health information technologies that do not sacrifice humanity for standardization. Finally, I will discuss the importance of broadening participation in computing, for more equitable research participation, methods, and output.

Talk 2 - Abstract: Online social networking platforms (OSNs) like Facebook, Twitter, and Reddit have become valuable data sources in studying societal response to high-impact events (terror attacks, natural disasters, mass demonstrations, etc.). These events unfold rapidly, with users posting their responses and new developments to OSNs as they happen. Rapidly understanding these responses can be critical to providing assistance or reducing conflict.

This talk discusses three main areas in this research: 1) How well does OSN data reflect real-world population data, 2) What are the patterns in response behavior to these events, and 3) How can low-quality information be filtered out from these data sources?

I will present findings across these questions, showing social media data mirrors certain geographic populations, discussing event-detection algorithms, and outlining some current research in cross-platform information quality. I will then open discussion on future work in: OSN data for qualitative study, crisis informatics, and studies of population/platform differences in online information quality.

Bio: Gabriela Marcu is an Assistant Professor in the College of Computing and Informatics and a Research Fellow with the A.J. Drexel Autism Institute at Drexel University. Her research applies participatory design, action research, and ubiquitous computing to promote behavioral health and social justice. Dr. Marcu directs the Empathic Research Group, a highly diverse and interdisciplinary team passionate about user experience and social change. She holds a Ph.D. in Human-Computer Interaction from Carnegie Mellon University, and a B.S. in Informatics from the University of California, Irvine. She has been named a Siebel Scholar, NSF Graduate Research Fellow, Microsoft Research Graduate Women Scholar, and Google Anita Borg Scholar.

Bio: Dr. Cody Buntain is a postdoctoral research fellow at the University of Maryland’s Human-Computer Interaction Lab and is funded by the Intelligence Community Postdoctoral Fellowship. His current areas of research include studying complex social systems and how society leverages social media in the aftermath of crises and social unrest. This research includes evaluating information credibility across social media platforms, real-time information retrieval and event detection in response to crises, social media reflections of real-world phenomena, and the intersection of machine learning and computational social science.


Mark Fuge,
University of Maryland, College Park

Designing with Data: How machine learning is morphing human, product, and system design

Abstract: The nature of product design has increased in scale, both inside corporations and in self-organized online communities (e.g., OpenIDEO, Local Motors). This is thanks to unprecedented amounts of digital design information made possible by globally distributed groups of thousands of people who collaborate together on design projects over the Internet. However, this increased scale and diversity comes with a price: 1) these groups generate more data than they can effectively use, 2) it becomes difficult to leverage their diverse expertise, and 3) involving non-experts meaningfully the design process, particularly for complex mechanical systems, requires rethinking how people interact with design tools and what kind of intelligent support we need to provide.

In this talk I'll address how advances in machine learning can ameliorate these issues. Specifically, my students and I will introduce ongoing work on three problems: 1) how to use data to understand and simplify complex, high-dimensional, design spaces (to aid in techniques like optimization, design synthesis, and design exploration), 2) how to filter high-quality, diverse submissions out of large pools of design ideas generated by online communities (to aid in design generation and selection), and 3) how to enable non-experts to design complex mechanical parts (such as 3D printable robots) by using AI to automate various mechanical design tasks. Each problem highlights how building probabilistic models of designs via data can often produce a whole that is greater than the sum of its parts and make design (even of complex, physical systems) more inclusive.

Bio: Mark Fuge is an Assistant Professor of Mechanical Engineering at the University of Maryland, College Park, and recently joined the HCIL as a faculty member. His research lies at the intersection of Mechanical Engineering, Machine Learning, and Design; an area often referred to as "Design Informatics" or "Data-Driven Design." He received his Ph.D. at the University of California at Berkeley, and received his M.S. and B.S. at Carnegie Mellon University. He has conducted research in applied machine learning, optimization, network analysis, additive manufacturing, human-computer interfaces, crowdsourcing, and creativity support tools. He has received a DARPA Young Faculty Award and a National Defense Science and Engineering Graduate (NDSEG) Fellowship. You can learn more about his research at his lab’s website:


Sigfried Gold,
University of Maryland, College Park

Exploratory visualization tools for health records research, and an exciting detour into infrastructural support for health records research at UMD

Abstract: Important medical research is increasingly based on analysis of data collected during provision of routine care. Compared to clinical trials data, this "secondary use" data is not susceptible to randomized, prospective study protocols; it suffers from poor quality and extreme "missingness" for observational or retrospective methods; strict privacy and human subjects regulations limit its availability; processing it for analysis is complicated by the diversity of its sources, formats, and the plethora of language and coding systems in which it is recorded; and analyzing it generally requires advanced clinical training and methods for grappling with its extreme multi-variateness, sparsity, and unknown systemic biases. Despite these formidable challenges, this data is orders of magnitude cheaper and more prolific than clinical trial data. Researchers and analysts within medical provider institutions can have access to data for millions of patients essentially for free; while medical products companies, regulators, and payer institutions can affordably purchase data for hundreds of millions of patients. Further, although analysts' uses cases are diverse and their methods (e.g., advanced statistics or machine learning) often opaque as well as immature; they share many basic questions and tasks: they almost universally need to characterize their populations on various demographic and clinical dimensions; they generally need to choose study and comparator cohorts; they need to group patients by disease and treatment parameters; they need to evaluate the significance of untold co-morbidities and confounders; they need to explore and discover temporal patterns obscured by the volume and variability of the data.

The advent of common data models and open-source software is just beginning to drastically streamline research workflows with this data. For analysts with access to data in OHDSI ( format, for instance, many months of the standard observational study workflow can be skipped entirely. OHDSI's web-based cohort construction tools and it's open and growing R methods library allow researchers not only to define and execute their studies in hours or days rather than months, these researchers can now instantly and precisely share their code and aggregate results in a research network to be immediately replicated on dozens of other databases containing records for hundreds of millions of patients.

What this means for my research is: 1) my visualization tools can be built to a single data model and can be tested with a wide variety of use cases and without requiring my subject matter expert collaborators to perform data collection and transformation just to work with me; and 2) my tools can be built with immediate integration into platforms they are already using, so, for instance, they can take advantage of these experimental visualization tools as they design their study and set parameters; they can feed those parameters into their statistical or machine learning algorithms; and they can then (continuing in the same platform) use these visualization tools to explore and evaluate results.

What it also means for my research, for better or worse, is that my model for developing and evaluating visualization software and working with users and collaborators is very different from what HCI researchers are used to, and, since no one at UMD (as far as I know) is using OHDSI or anything like it, I have been spending more time explaining and evangelizing for my preferred research platform than for my research itself.

At the Brown Bag I will talk about both; but depending on audience interest (some of our visualization researchers will be off at IEEE VIS this week), I may end up focusing more on the infrastructural issues.

Bio: With 29 years of experience in developing data management and analysis software on Unix/Linux and web platforms, Gold specializes in designing and implementing innovative, browser-based information visual analytics tools to facilitate the exploration and understanding of complex, multivariate or temporal data. He has experience in a wide array of industries (cyber security, securities trading, law, public sector administration, fundraising), but particular expertise in medical informatics and the secondary use of clinical and claims data for pharmacoepidemiology and patient safety research. He works with medical data using a common data model and open-source software as a collaborator in the OHDSI community.


Foad Hamidi,
University of Maryland, Baltimore County

Designing for User Agency and Participation

Abstract: Digital technologies provide many opportunities to engage the interest and attention of users of all ages. A central question for the designers of these systems is what aspects of user interaction do they want to encourage and emphasize. In this talk, I present several research projects in which I designed digital systems to motivate user participation and collaboration. These projects include a digital living media system that engages child users though the dynamics of caring and responsibility and a Do-It-Yourself (DIY) open-source communication board for non-verbal users. For each project, I describe how I worked closely with various stakeholders including children, parents and teachers. I conclude with reflections on how to design digital system to support human agency and participation.

Bio: Foad Hamidi is a Postdoctoral Research Associate at the University of Maryland, Baltimore County. His research interests include Human-Computer Interaction, Participatory Design, Digital Living Media Systems and DIY Assistive Technology. He is passionate about interdisciplinary cormmunitity-engaged research and has work on research projects in different cultural contexts, including Kenya, Bhutan and Mexico. He has a PhD in Computer Science from York University, Toronto.


Internship Panel

Internship Panel

Abstract: The panel will share their experiences applying for the internships and finishing them. They will also provide resources including for practicing coding, improving resume, and interview questions.

Bio: The panel consists of PhD students from UMD CS and ISchool---Leyla Norooz, Seokbin Kang, Zhe Cui, Deok Gun Park, and Sriram Karthik Badam. They have done internships at both academia and industry including MSR, Google, Adobe, IBM, LinkedIn, and INRIA (France).


Janet Walkoe,
University of Maryland, College Park

Teacher Noticing: Leveraging Technology to Explore Noticing and Noticing to Explore Technology

Abstract: We introduce technology-mediated teacher noticing (TMTN): a vision for the design and use of technology-mediated tools that takes seriously the need for teachers to attend to, interpret, and respond to their students’ thinking. This vision is situated at the intersection of research on teacher noticing, and on technology to support student thinking. We synthesize that work to highlight specific ways that technology-mediated classroom tools can focus and stabilize teachers’ attention on valuable aspects of student thinking emphasized by current reform efforts. We then illustrate TMTN with classroom examples in which technology supported or obstructed teachers' attention to student thinking, and consider implications for research on technology in teacher practice, professional development, and the design of technological tools for K-12 classrooms.

Bio: Janet is a Learning Scientist and Mathematics Educator. She earned her Doctorate from Northwestern University in the Learning Sciences in 2012. She also holds an MS in Mathematics from the University of Illinois at Chicago and a BA in Mathematics from the University of Chicago. Before enrolling in graduate school, Janet taught high school mathematics (from 1996-2006), earning National Board Certification in 2003. Janet studies the teaching and learning of algebra in formal and informal environments. In particular, she is interested in the natural resources children bring to algebra classes and how to help teachers leverage these resources. Outside the college you may find her at the yoga studio or spending time in Washington DC with her daughter, husband & their pet rats.


Joseph G. Davis,
University of Sydney

Visualizing and Exploring Cliques and Cartel-Like Patterns in Citation Networks

Abstract: With the growing emphasis on metrics such as citation count and h-index for research assessment, several reports of gaming and cartel-like formations for boosting citation statistics have emerged. However, such cartels are extremely difficult to detect. This paper presents a systematic approach to visualizing and computing clique and other anomalous patterns through ego-centric citation network analysis by drilling down into the details of individual researcher’s citations. After grouping the citations into three categories, namely, self- citations, co-author citations, and distant citations, we focus our analysis on the outliers with relatively high proportion of self- and co-author citations. By analyzing the complete co-authorship citation networks of these researchers one at a time along with all the co-authors and by merging these networks, we were able to isolate and visualize cliques and anomalous citation patterns that suggest plausible collusion. Our exploratory analysis was carried out using the citation data from Web of Science (now Clarivate Analytics) for all the highly cited researchers in Computer Science and Physics. I will also discuss some of the potential research opportunities in 'citation analytics'.

Bio: Joseph G. Davis is the Professor of Information Systems and Services at the School of Information Technologies, the University of Sydney, Sydney, Australia. He directs the Knowledge Discovery and Management Research Group and is the theme leader for service computing at the Centre for Distributed and High Performance Computing at Sydney. His research covers crowdsourcing, data analytics, ontologies and semantic web, and service computing. He has published over 110 research papers in these and related areas. His research has been funded by the Australian Research Council, Cooperative Centre for Smart Services, Data 61, IBM Research Labs, Carnegie Bosch Institute, among others.

Joseph completed his PhD in Information Systems at the University of Pittsburgh. He has held previous academic positions at Indiana University Bloomington and University of Auckland and Visiting Professorships at Carnegie Mellon University, Syracuse University, University of Pittsburgh, and IBM Research Labs. He is a Senior Member of the ACM and a Charter Member of the Association for Information Systems.


Ben Shneiderman,
University of Maryland, College Park

How do art & design accelerate research in science & engineering?

Abstract: Leonardo is the classic example of fusion between art and science, as well as design and engineering. His artistic side amplified his perceptual abilities enabling him to make scientific breakthroughs about human anatomy, hydraulics, optics, and much more. Similarly, Pasteur’s training in lithography sensitized him to understand the chirality of molecules. Artistic skill enabling science is but one of four paths that I see. A second path is that the demands of art push science and engineering forward, as in the case of Karl Heinz needing to create the MP3 algorithms for compressing music. A third path is that the playful, exploratory, iterative, and divergent methods of art & design free up scientists and engineers to expand the range of their thinking. A fourth path is that products of art & design, such as paintings, sculpture, music, or film can directly inspire scientists and engineers. This talk will present further examples and call for closer connections across these disciplines.

Bio: Ben Shneiderman ( is a Distinguished University Professor in the Department of Computer Science, Founding Director (1983-2000) of the Human-Computer Interaction Laboratory (, and a Member of the UM Institute for Advanced Computer Studies (UMIACS) at the University of Maryland. He is a Fellow of the AAAS, ACM, IEEE, and NAI, and a Member of the National Academy of Engineering, in recognition of his pioneering contributions to human-computer interaction and information visualization. His contributions include the direct manipulation concept, clickable highlighted web-links, touchscreen keyboards, dynamic query sliders, development of treemaps, novel network visualizations for NodeXL, and temporal event sequence analysis for electronic health records.

Shneiderman is the co-author with Catherine Plaisant of Designing the User Interface: Strategies for Effective Human-Computer Interaction (6th ed., 2016) With Stu Card and Jock Mackinlay, he co-authored Readings in Information Visualization: Using Vision to Think (1999). He co-authored, Analyzing Social Media Networks with NodeXL ( (Morgan Kaufmann) with Derek Hansen and Marc Smith. Shneiderman’s latest book is The New ABCs of Research: Achieving Breakthrough Collaborations (Oxford, April 2016).


Karthik Ramani,
Purdue University,
West Lafayette

A New Genre of Human Computer-Interaction and Interfaces for 3D Creative Design and Fabrication

Abstract: The convergence of many factors such as low cost sensors, electronics, computing, machines, and more recently machine learning have created the potential for changing the way users engage with the physical world. This talk will explore and demonstrate how we can create new geometric interfaces and interactions that leverage our knowledge of the physical world for 3D design and fabrication. These new methods and tools enable users to personalize designs using new machines. In the first part of the talk we will explore how any consumer with little knowledge of computers can repurpose everyday objects and or shapes and quickly customize them to foldable constructions. Such constructions are then used to create robots in the physical world. In the second part we will see how new interactive workflows using a smart phone and tablets with pen-and-touch interfaces can be used for collaborative 3D design ideation. As a result of low thresholds and simple user interactions with lower cognitive loads, users are shown to explore multiple creative pathways. In the last part of the talk we will examine how a new deep learning technique, “SurfNET”, transforms a single image into 3D shapes and even hallucinate shapes that it has not seen. We envision a future with personalized manufacturing interfaces that lower the barrier for many to participate in the design and fabrication processes.

Bio: Karthik Ramani is the Donald W. Feddersen Professor of School of Mechanical Engineering at Purdue University, with courtesy appointments in Electrical and Computer Engineering and College of Education. He earned his B.Tech from the Indian Institute of Technology, Madras, in 1985, an MS from Ohio State University, in 1987, and a Ph.D. from Stanford University in 1991, all in Mechanical Engineering. He has received many awards from the National Science Foundation (NSF) and other organizations. He has served in the editorial board of Elsevier Journal of Computer-Aided Design (CAD) and the ASME Journal of Mechanical Design (JMD). In 2008 he was a visiting Professor at Stanford University (computer sciences), research fellow at PARC (formerly Xerox PARC), and in Oxford University Institute of Mathematical Sciences in summer 2016. He also serves on the Engineering Advisory sub-committee for the NSF IIP (Industrial Innovation and Partnerships). In 2006 and 2007, he won the Most Cited Journal Paper award from CAD and the Research Excellence award in the College of Engineering at Purdue University. In 2009, he won the Outstanding Commercialization award from Purdue University. He was the co-founder of the world’s first commercial shape-based search engine (VizSeek) and more recently co-founded ZeroUI whose product (Ziro) won the Best of Consumer Electronics Show Finalist (CES 2016). He has won several best paper awards and in 2014 the Outstanding Research Excellence Award from ASME Computers and Information Sciences in Engineering Division. NSF recently invited him as a distinguished speaker in cyber-learning and engineering maker spaces. In 2015 he won the most cited researcher for 2005-16 in the Elsevier CAD journal. His recent papers have been published in venues such as ACM (SIGCHI, UIST); IEEE (CVPR, ECCV, ICCV, TVCG, VAST), TEI, CAD and ASME JMD.

11/23/2017 No Brown Bag, Thanksgiving recess

Georgia Bullen




Pamela Wisniewski
University of Central Florida



Fall 2017 Schedule

Date Leader Topic

Kickoff to a new Semester!

Come, network, make introductions, and share what you are working on

Please come to our first BBL of the Spring 2018 semester to introduce yourself and share what you're working on in the coming semester. The first BBL will be for us to network with each other and kickoff a great new semester.


Bahador Saket
Georgia Tech, Atlanta




Georgia Bullen








Norman Su
Indiana University



Past Brown Bags

View the Past Brown Bag Lunch Schedules to learn more about prior talks.