• Publications
  • Influence
Emergency-relief coordination on social media: Automatically matching resource requests and offers
TLDR
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
  • 91
  • 8
Intent Classification of Short-Text on Social Media
TLDR
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
  • 32
  • 3
  • PDF
Identifying Seekers and Suppliers in Social Media Communities to Support Crisis Coordination
TLDR
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
  • 74
  • 2
Twitris: A System for Collective Social Intelligence
TLDR
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
  • 53
  • 2
  • PDF
Finding Influential Authors in Brand-Page Communities
TLDR
We present a study towards finding influential authors on Twitter forums where an implicit network based on user interactions is created and analyzed. Expand
  • 23
  • 2
  • PDF
Mining Help Intent on Twitter During Disasters via Transfer Learning with Sparse Coding
TLDR
We propose a novel transfer learning method for help intent identification on Twitter during a new disaster using novel Sparse Coding feature representation. Expand
  • 14
  • 2
  • PDF
CitizenHelper-Adaptive: Expert-Augmented Streaming Analytics System for Emergency Services and Humanitarian Organizations
TLDR
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
  • 8
  • 2
A Qualitative Examination of Topical Tweet and Retweet Practices
TLDR
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
  • 102
  • 1
  • PDF
Twitris 2.0 : Semantically Empowered System for Understanding Perceptions From Social Data
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 addressesExpand
  • 62
  • 1
  • PDF
On Understanding the Divergence of Online Social Group Discussion
TLDR
We study online social group dynamics based on how group members diverge in their online discussions. Expand
  • 20
  • 1
  • PDF