Hemant Purohit
Hemant Purohit, Ph.D. Assistant Professor of Information Sciences & Technology, George Mason University
Lead, Humanitarian & Social Informatics Lab

Research: Computational Social Science| Text Mining| Semantic Computing| Cooperative Info System| Humanitarian Informatics

Impact: #SocialGood | #SmartCommunities | #InformationOverload | #HumanBehavior

Check updates on the IJCAI-2017 and IJCAI-2016 Semantic Machine Learning Workshop (#SML16,#SML17)

Research Portfolio

Research Interest: study human behavior on the Web via an interdisciplinary approach of Computer and Social Sciences, for addressing a fundamental problem of information overload. I model individual and group behavior (e.g., intent, comprehension, attitude and engagement) in online communities to design cooperative information systems that mine crowd-generated and opensource data to address information overload for supporting organizational decision making. This research is employed into a variety of informatics problems for social good in smart communities, including emergency management, gender-based violence, public health resilience, and cyber defense.

Technical Interest: merge top-down and bottom-up data mining approaches by employing domain semantics and guidance from offline socio-behavioral knowledge into statistical methods and understand individual and group behavior from unstructured, large-scale social, open Web and IoT data.

Check relevant projects of Humanitarian & Social Informatics Lab (HSIL) research group.

Selected Publications:


Quick Summary

Studying real-world problems
related to online human social dynamics (engagement, intent, belief, cooperation) in social network communities by leveraging computational models inspired by domain semantics and behavioral knowledge from psychology (Social Identity, Social Cohesion, etc.) My research lies across the areas of Intent Mining, Bipartite Matching, Expert Detection, Community Evolution, and User Engagement analysis using large-scale unstructured data from social media and Web. My research has key applications in improving humanitarian crisis coordination and the understanding of online user behavior.

Selected Talks

Awards and Honors

Professional & Volunteering Services

Professional Community Services:

Volunteer Community Services:

  • - Coordination, Mapping and Analysis
    • J&K (India) Floods response via JKFloodRelief.org (now InCrisisRelief.org) . Among key team coordinators of V.O.I.C.E. to facilitate the largest international, citizen-led response drive with scalable impact for relief, involving 25+ orgs. In this unprecedented tech-assisted initiative, I also helped in data coordination for social media mining via our Twitris technology. (Teamwork cited by: Hindustan Times, OneIndia, Zee News, NPR, LightHouse Insights, etc.), Sept 2014
    • Phailin cyclone crisis-map, India . Initiative in collaboration with Google Crisis Response team and digital volunteers globally from different organizations (SBTF, OpenCrisis, Info4Disasters, HumanityRoad, etc.) and universities. (Teamwork cited by: Times Of India, DNA, Business Standard, EfyTimes, Kochi Reporter, Gadget Garrio, GeoSpatial World, Global Resilience Systems), Oct 2013
    • Uttarakhand floods crisis-map, India . Crisis-mapping initiative in collaboration with Google Crisis Response team, volunteers from universities around the world and from prestigious organizations (SBTF, Info4, OpenCrisis, HOT, CrisisMappersUK), including a surge support from Humanity Road contributed in this (Teamwork cited by The Hindu articles 1, 2), Jun 2013

  • - Technical volunteering for Social Data Mining
    • Oklahoma tornado, US. Extensive analysis of donation requests and offers to help (iRevolutions blog, also in Infographic), May 2013
    • Balochistan earthquake analysis with UN OCHA to identify key influencers on social media for needs such as medical aid, Sept 2013
    • Yolanda (Philippines) Typhoon response via Twitris technologies for assisting crowdsourcing app MicroMappers by my mentor Patrick Meier's social-innovation team at QCRI and SBTF, for UN OCHA. (iRevolutions blog: results & launch, Wall Street Journal), Nov 2013
    • Others: Hurricane Sandy, US, 2012; East cost snow storm, US, 2013; Khartoum floods, Sudan, 2013; Colorado floods, US, 2013

Contact Me

I enjoy working with passionate collaborators and students as well as always welcome synergistic projects.
For students: Do you like challenging real world data problems for social development? If interested in Ph.D. and MS/BS-thesis, you can connect via mail at h p u r o h i t _a_t_ g m u _d_o_t_ e d u .