Ujwal Gadiraju

Ph.D student @ L3S Research Center, Leibniz University of Hannover

Publications



[DBLP] , [Google Scholar]

2017

Modus Operandi of Crowd Workers : The Invisible Role of Microtask Work Environments
Ujwal Gadiraju, Alessandro Checco, Neha Gupta, and Gianluca Demartini
ACM IMWUT, UBICOMP2017. [PDF | slides]
Using Worker Self-Assessments for Competence-based Pre-selection in Crowdsourcing Microtasks
Ujwal Gadiraju, Besnik Fetahu, Ricardo Kawase, Patrick Siehndel and Stefan Dietze
ACM TOCHI 2017. [PDF | slides]
Clarity is a Worthwhile Quality - On the Role of Task Clarity in Microtask Crowdsourcing
Ujwal Gadiraju, Jie Yang and Alessandro Bozzon
HT 2017 [BEST PAPER AWARD]; Prague, Czech Republic. [PDF | slides]
Improving Reliability of Crowdsourced Results by Detecting Crowd Workers with Multiple Identities
Ujwal Gadiraju and Ricardo Kawase
ICWE 2017; Rome, Italy. [PDF | slides]
Improving Learning Through Achievement Priming in Information Finding Microtasks
Ujwal Gadiraju and Stefan Dietze
LAK 2017; Vancouver, Canada. [PDF | slides]
FuseM: Query-Centric Data Fusion on Structured Web Markup
Ran Yu, Ujwal Gadiraju, Besnik Fetahu and Stefan Dietze
ICDE 2017; San Diego, USA. [PDF | slides]
JustEvents: A Crowdsourced Corpus for Event Validation with Strict Temporal Constraints
Andrea Ceroni, Ujwal Gadiraju and Marco Fisichella
ECIR 2017; Aberdeen, Scotland. [PDF | slides | Data ]

2016

Estimating Domain Specificity for Effective Crowdsourcing of Link Prediction and Schema Mapping
Ujwal Gadiraju, Patrick Siehndel and Stefan Dietze
WebSci 2016; *BEST POSTER* Hannover, Germany. [PDF | slides]
Crystal Clear or Very Vague? Effects of Task Clarity in the Microtask Crowdsourcing Ecosystem
Ujwal Gadiraju
Trust In Crowd Work, WebSci 2016; Hannover, Germany. [PDF | slides]
Dealing With Sub-optimal Crowd Work : Implications of Current Quality Control Practices
Ujwal Gadiraju and Neha Gupta
CHI 2016; "Crowd Dynamics" Workshop; San Jose, USA. [PDF | slides]
Cognitive Factors that Influence Workers’ Task Performance in Crowdsourcing Microtasks
Darren J. Edwards and Ujwal Gadiraju
CHI 2016; "Productivity Decomposed" Workshop; San Jose, USA. [PDF | slides]
Analysing Structured Scholarly Data embedded in Web Pages
Pracheta Sahoo, Ujwal Gadiraju, Ran Yu, Sriparna Saha and Stefan Dietze
WWW 2016; "Semantics, Analytics, Visualisation: Enhancing Scholarly Data (SAVE-SD2016)" Workshop; Montreal, Canada. [PDF | slides]
Unlock the Stock: User Topic Modeling for Stock Market Analysis
Patrick Siehndel and Ujwal Gadiraju
EDBT/ICDT 2016; Bordeaux, France. [PDF | slides]

2015

Understanding Malicious Behavior in Crowdsourcing Platforms: The Case of Online Surveys
Ujwal Gadiraju, Ricardo Kawase, Stefan Dietze, and Gianluca Demartini
CHI 2015; Seoul, Korea. [PDF | slides]
Human Beyond the Machine: Challenges and Opportunities of Microtask Crowdsourcing
Ujwal Gadiraju, Gianluca Demartini, Ricardo Kawase, and Stefan Dietze
IEEE Intelligent Systems, Volume 30 Issue 4 - Jul/Aug 2015. [PDF]
Ranking Buildings and Mining the Web for Popular Architectural Patterns
Ujwal Gadiraju, Stefan Dietze, and Ernesto Diaz-Aviles
WebScience 2015; Oxford, UK. [PDF | slides]
Improving Entity Retrieval on Structured Data
Besnik Fetahu, Ujwal Gadiraju, Stefan Dietze
ISWC 2015; Bethlehem, Pennsylvania, USA. [PDF | slides]
Training Workers for Improving Performance in Crowdsourcing Microtasks
Ujwal Gadiraju, Besnik Fetahu, and Ricardo Kawase
ECTEL 2015; Toledo, Spain. [PDF | slides]
Breaking Bad - Understanding Behavior of Crowd Workers in Categorization Microtasks
Ujwal Gadiraju, Ricardo Kawase, Patrick Siehndel, and Besnik Fetahu
HyperText 2015 (short); Northern Cyprus. [PDF | slides]
Make Hay While the Crowd Shines: Towards Efficient Crowdsourcing on the Web
Ujwal Gadiraju
WWW 2015 (companion); Florence, Italy. [PDF | slides]
Improving Event Detection by Automatically Assessing Validity of Event Occurrence in Text
Andrea Ceroni, Ujwal Gadiraju, and Marco Fisichella
CIKM 2015 (short); Melbourne, Australia. [PDF | slides]
Balancing Novelty and Salience: Adaptive Learning to Rank Entities for Timeline Summarization of High-impact Events
Tuan Tran, Claudia Niederée, Nattiya Kanhabua, Ujwal Gadiraju, and Avishek Anand
CIKM 2015; Melbourne, Australia. [PDF | slides]
Adaptive Focused Crawling of Linked Data
Ran Yu, Ujwal Gadiraju, Besnik Fetahu and Stefan Dietze
WISE 2015; Miami, Florida, USA. [PDF | slides]

2014

Extracting Architectural Patterns from Web Data
Ujwal Gadiraju, Ricardo Kawase, and Stefan Dietze
ISWC (Best Poster), 2014; Riva del Garda, Italy. [PDF]
Crawl Me Maybe: Iterative Linked Dataset Preservation
Besnik Fetahu, Ujwal Gadiraju, Stefan Dietze.
ISWC (poster), 2014; Riva del Garda, Italy.
WikipEvent: Temporal Event Data for the Semantic Web
Ujwal Gadiraju, Kaweh Djafari Naini, Andrea Ceroni, Mihai Georgescu, Dang Duc Pham, and Marco Fisichella
ISWC (demo), 2014; Riva del Garda, Italy.
A Taxonomy of Microtasks on the Web
Ujwal Gadiraju, Ricardo Kawase, and Stefan Dietze
HyperText 2014 (short); Santiago, Chile.
Information Evolution in Wikipedia
Andrea Ceroni, Mihai Georgescu, Ujwal Gadiraju, Kaweh Djafari Naini, and Marco Fisichella
OpenSym 2014; Berlin, Germany.
Technology Enhancing Learning: Past, Present and Future
Ricardo Kawase, Patrick Siehndel, and Ujwal Gadiraju
ECTEL 2014; Graz, Austria.
When in doubt ask the crowd: Employing crowdsourcing for active learning
Mihai Georgescu, Dang Duc Pham, Claudiu S Firan, Ujwal Gadiraju, and Wolfgang Nejdl
WIMS 2014; Thessaloniki, Greece.
Twinder: Enhancing Twitter Search
Ke Tao, Fabian Abel, Claudia Hauff, Geert-Jan Houben, and Ujwal Gadiraju
Bridging Between Information Retrieval and Databases, 2014 (book); Springer Berlin Heidelberg (publisher).

2013

Towards Preservation of Semantically Enriched Architectural Knowledge
Stefan Dietze, Jakob Beetz, Ujwal Gadiraju, Georgios Katsimpras, Raoul Wessel, and René Berndt
SDA 2013; Malta, Italy
Groundhog Day: Near-duplicate Detection on Twitter
Ke Tao, Fabian Abel, Claudia Hauff, Geert-Jan Houben, and Ujwal Gadiraju
WWW 2013; Rio de Janeiro, Brazil