Hemant Purohit

Publications
Influence

Emergency-relief coordination on social media: Automatically matching resource requests and offers

Hemant Purohit, C. Castillo, Fernando Diaz, A. Sheth, P. Meier
Business, Computer Science
First Monday
28 December 2013

We present machine–learning methods to automatically identify and match needs and offers communicated via social media for items and services such as shelter, money, clothing, etc. that can substantially accelerate emergency relief efforts. Expand

Intent Classification of Short-Text on Social Media

Hemant Purohit, G. Dong, V. Shalin, K. Thirunarayan, A. Sheth
Computer Science
IEEE International Conference on Smart City…
1 December 2015

We exploit a hybrid feature representation created by combining top-down processing using knowledge-guided patterns with bottom-up processing using a bag-of-tokens model. Expand

Identifying Seekers and Suppliers in Social Media Communities to Support Crisis Coordination

Hemant Purohit, Andrew J. Hampton, S. Bhatt, V. Shalin, A. Sheth, J. Flach
Psychology, Computer Science
Computer Supported Cooperative Work (CSCW)
1 December 2014

We demonstrate a supportive technology that recognizes the existing capabilities of the informal response community to identify needs (seeker behavior) and provide resources (supplier behavior). Expand

Twitris: A System for Collective Social Intelligence

A. Sheth, Ashutosh Jadhav, +4 authors W. Wang
Psychology, Computer Science
Encyclopedia of Social Network Analysis and…
2014

Citizen Sensing Humans or citizens on the ubiquitous Web, acting as sensors and sharing their observations and views using mobile devices, mobile apps, and Web 2.0 services. Expand

Finding Influential Authors in Brand-Page Communities

Hemant Purohit, J. Ajmera, S. Joshi, Ashish Verma, A. Sheth
Computer Science
ICWSM
20 May 2012

We present a study towards finding influential authors on Twitter forums where an implicit network based on user interactions is created and analyzed. Expand

Mining Help Intent on Twitter During Disasters via Transfer Learning with Sparse Coding

Bahman Pedrood, Hemant Purohit
Computer Science
SBP-BRiMS
10 July 2018

We propose a novel transfer learning method for help intent identification on Twitter during a new disaster using novel Sparse Coding feature representation. Expand

CitizenHelper-Adaptive: Expert-Augmented Streaming Analytics System for Emergency Services and Humanitarian Organizations

Rahul Pandey, Hemant Purohit
Computer Science
IEEE/ACM International Conference on Advances in…
1 August 2018

We present an interactive user-feedback based streaming analytics system ‘CitizenHelper-Adaptive’ to mine social media, news, and other public Web data streams for emergency services and humanitarian organizations. Expand

A Qualitative Examination of Topical Tweet and Retweet Practices

M. Nagarajan, Hemant Purohit, A. Sheth
Computer Science
ICWSM
16 May 2010

We analyze over a million tweets pertaining to three events, present general tweet properties in such topical datasets and qualitatively analyze the properties of the retweet behavior surrounding the most tweeted/viral content. Expand

Twitris 2.0 : Semantically Empowered System for Understanding Perceptions From Social Data

A. Jadhav, Hemant Purohit, +7 authors A. Sheth
Geography
2010

We present Twitris 2.0 , a Semantic Web application that facilitates understanding of social perceptions by Semantics-based processing of massive amounts of event-centric data. Twitris 2.0 addresses… Expand

On Understanding the Divergence of Online Social Group Discussion

Hemant Purohit, Yiye Ruan, D. Fuhry, S. Parthasarathy, A. Sheth
Sociology, Computer Science
ICWSM
16 May 2014

We study online social group dynamics based on how group members diverge in their online discussions. Expand

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