Denis Helic

Assoc.Prof. Dipl.-Ing. Dr.techn.

19972020
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Research Output 1997 2019

2019

Activity Archetypes in Question-and-Answer (Q&A) Websites—A Study of 50 Stack Exchange Instances

Teixeira dos Santos, T., Walk, S., Kern, R., Strohmaier, M. & Helic, D., 2019, In : ACM Transactions on Social Computing. 2, 1, 23 p., 4.

Research output: Contribution to journalArticleResearchpeer-review

Consensus Dynamics in Online Collaboration Networks

Hasani-Mavriqi, I., Jan 2019, 208 p.

Research output: ThesisDoctoral ThesisResearch

File
Social sciences
Physics
Electric network analysis
Large scale systems

Self- and Cross-Excitation in Stack Exchange Question & Answer Communities

Teixeira dos Santos, T., Walk, S., Kern, R., Strohmaier, M. & Helic, D., 2019, The Web Conference (WWW). Association of Computing Machinery, 11 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

2018

Consensus dynamics in online collaboration systems

Hasani-Mavriqi, I., Kowald, D., Helic, D. & Lex, E., 1 Dec 2018, In : Computational Social Networks. 5, 1, 2.

Research output: Contribution to journalArticleResearchpeer-review

Online systems
Opinion Dynamics
Experiments
Collaboration
Game

Invited papers from the ACM conference on hypertext and social media

Bonchi, F., Dolog, P., Helic, D. & Vojtas, P., 3 Apr 2018, In : New Review of Hypermedia and Multimedia. 24, 2, p. 61-62 2 p.

Research output: Contribution to journalEditorialResearchpeer-review

Modeling peer influence in time-varying networks

Wölbitsch, M., Walk, S. & Helic, D., 1 Jan 2018, Complex Networks and Their Applications VI - Proceedings of Complex Networks 2017 (The 6th International Conference on Complex Networks and Their Applications). Springer Verlag Heidelberg, p. 353-364 12 p. (Studies in Computational Intelligence; vol. 689).

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Time varying networks
Online systems
Specifications

Tag-based navigation and visualization

Dimitrov, D., Helic, D. & Strohmaier, M., 1 Jan 2018, Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics). Springer Verlag Heidelberg, p. 181-212 32 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 10100 LNCS).

Research output: Chapter in Book/Report/Conference proceedingChapterResearchpeer-review

Tagging
Navigation
Visualization
User interfaces
Web-based

Unsupervised learning for mental stress detection exploration of self-organizing maps

Huysmans, D., Smets, E., De Raedt, W., Van Hoof, C., Bogaerts, K., Van Diest, I. & Helic, D., 1 Jan 2018, BIOSIGNALS 2018 - 11th International Conference on Bio-Inspired Systems and Signal Processing, Proceedings; Part of 11th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2018. SciTePress 2013, Vol. 4. p. 26-35 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Unsupervised learning
Self organizing maps
Electrocardiography
Skin
Labels

User Behavioral Patterns and Early Dropouts Detection: Improved Users Profiling through Analysis of Successive Offering of MOOC

Vitiello, M., Walk, S., Helic, D., Chang, V. & Gütl, C., 2018, In : Journal of Universal Computer Science . 24, 8, p. 1131-1150

Research output: Contribution to journalArticleResearchpeer-review

2017

A method for evaluating the navigability of recommendation algorithms

Lamprecht, D., Strohmaier, M. & Helic, D., 2017, In : Studies in Computational Intelligence. 693, p. 247-259 13 p.

Research output: Contribution to journalArticleResearchpeer-review

Arsenals
Information retrieval

Comparing Hypotheses About Sequential Data: A Bayesian Approach and Its Applications

Lemmerich, F., Singer, P., Becker, M., Espin-Noboa, L., Dimitrov, D., Helic, D., Hotho, A. & Strohmaier, M., 2017, Machine Learning and Knowledge Discovery in Databases - European Conference, ECML PKDD 2017, Proceedings. Springer Verlag Wien, Vol. 10536 LNAI. p. 354-357 4 p. (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); vol. 10536 LNAI).

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Bayesian Approach
Markov processes
Websites
Testing
Markov Chain Model

Exploring the Impact of Trolls on Activity Dynamics in Real-World Collaboration Networks

Koncar, P., Walk, S., Helic, D. & Strohmaier, M., 3 Apr 2017, Proceedings of the 26th International Conference on World Wide Web Companion. p. 1573-1578 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Websites
Semantics

MOOC Dropouts: A Multi-system Classifier

Vitiello, M., Walk, K., Chang, V., Hernandez Rizzardini, R., Helic, D. & Gütl, C., 2017, Data Driven Approaches in Digital Education: Proceedings of 12th European Conference on Technology Enhanced Learning (EC-TEL 2017). Springer, p. 300-314 15 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Nonlinear characterization of activity dynamics in online collaboration websites

Teixeira dos Santos, T., Walk, S. & Helic, D., 2017, Proceedings of the 26th International Conference on World Wide Web Companion.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Predicting Dropouts on the Successive Offering of a MOOC

Vitiello, M., Walk, S., Helic, D., Chang, V. & Gütl, C., 2017, MOOC-MAKER 2017: Proceedings of the International Conference MOOC-MAKER 2017. p. 11-20 10 p.

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Semantic stability in wikipedia

Stanisavljevic, D., Hasani-Mavriqi, I., Lex, E., Strohmaier, M. & Helic, D., 1 Jan 2017, In : Studies in Computational Intelligence. 693, p. 385-395 11 p.

Research output: Contribution to journalArticleResearchpeer-review

Semantics
2016

Classifying students to improve MOOC dropout rates

Vitiello, M., Walk, S., Rizzardini, R., Helic, D. & Gütl, C., 2016, Proceedings of the EUROPEAN STAKEHOLDER SUMMIT on experiences and best practices in and around MOOCs (EMOOCS 2016). p. 501-508

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Semantic Stability in Wikipedia

Stanisavljevic, D., Mavriqi-Hasani, I., Lex, E., Strohmaier, M. & Helic, D., 30 Nov 2016, Complex Networks & Their Applications V: Proceedings of the 5th International Workshop on Complex Networks and their Applications (COMPLEX NETWORKS 2016). Springer International Publishing AG , p. 379-390

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

The influence of social status and network structure on consensus building in collaboration networks

Mavriqi-Hasani, I., Geigl, F., Pujari, S. C., Lex, E. & Helic, D., 15 Sep 2016, In : Social Network Analysis and Mining. 6, 1, p. 1 17 p.

Research output: Contribution to journalArticleResearchpeer-review

Open Access
File
social status
social network
social class
simulation
2015

How to Apply Markov Chains for Modeling Sequential Edit Patterns in Collaborative Ontology-Engineering Projects

Walk, S., Singer, P., Strohmaier, M., Helic, D., Noy, N. & Musen, M., 2015, In : International Journal of Human-Computer Studies. 84, p. 51-66

Research output: Contribution to journalArticleResearchpeer-review

Hyptrails: A bayesian approach for comparing hypotheses about human trails on the web

Singer, P., Helic, D., Hotho, A. & Strohmaier, M., 2015, International World Wide Web Conference. ., p. 1003-1013

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Improving recommender system navigability through diversification: a case study of IMDb

Lamprecht, D., Geigl, F., Karas, T., Walk, S., Helic, D. & Strohmaier, M., 2015, International Conference on Knowledge Management. ., p. 21:1-21:8

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Open Access
File

Influence of Status on Consensus Building in Collaboration Networks

Hasani-Mavriqi, I., Geigl, F., Pujari, S. C., Lex, E. & Helic, D., 2015, Proceedings of the IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining (ASONAM 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Photowalking the City: Comparing Hypotheses About Urban Photo Trails on Flickr

Becker, M., Singer, P., Lemmerich, F., Hotho, A., Helic, D. & Strohmaier, M., 2015, Proceedings of the 7th International Conference on Social Informatics, SocInfo 2015. ., p. 227-244

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Quo vadis? On the effects of Wikipedia’s policies on navigation

Lamprecht, D., Helic, D. & Strohmaier, M., 2015, Wikipedia, a Social Pedia: Research Challenges and Opportunities. ., p. 64-66

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Random surfers on a web encyclopedia

Geigl, F., Lamprecht, D., Hofmann-Wellenhof, R., Walk, S., Strohmaier, M. & Helic, D., 2015, International Conference on Knowledge Management. ., p. 5:1-5:8

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

The Influence of Social Status on Consensus Building in Collaboration Networks

Hasani-Mavriqi, I., Geigl, F., Pujari, S. C., Lex, E. & Helic, D., 2015, Proceedings of the 2015 IEEE/ACM International Conference on Advances in Social Networks Analysis and Mining. New York: Association of Computing Machinery, p. 162-169

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Open Access
File

The Role of Structural Information for Designing Navigational User Interfaces

Dimitrov, D., Singer, P., Helic, D. & Strohmaier, M., 2015, ACM Conference on Hypertext and Hypermedia. ., p. 59-68

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Using ontologies to model human navigation behavior in information networks: A study based on Wikipedia

Lamprecht, D., Strohmaier, M., Helic, D., Nyulas, C., Tudorache, T., Nox, N. F. & Musen, M. A., 2015, In : Semantic web. 6, 4, p. 403-422

Research output: Contribution to journalArticleResearchpeer-review

VizTrails: An Information Visualization Tool for Exploring Geographic Movement Trajectories

Becker, M., Singer, P., Lemmerich, F., Hotho, A., Helic, D. & Strohmaier, M., 2015, ACM Conference on Hypertext and Hypermedia. ., p. 319-320

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

2014

Detecting Memory and Structure in Human Navigation Patterns Using Markov Chain Models of Varying Order

Singer, P., Helic, D., Taraghi, B. & Strohmaier, M., 2014, In : PLoS ONE. 9, 12, p. 9(12)-9(12)

Research output: Contribution to journalArticleResearchpeer-review

Memory and Structure in Human Navigation Patterns

Singer, P., Helic, D., Taraghi, B. & Strohmaier, M., 2014, (Submitted) In : arXiv.org e-Print archive.

Research output: Contribution to journalArticleResearch

Regular equivalence in informed network search

Helic, D., 2014, International Convention on Information and Communication Technology, Electronics and Microelectronics. ., p. 1088-1093

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

The Role of Homophily and Popularity in Informed Decentralized Search

Geigl, F. & Helic, D., 2014, Proceedings of the 2nd International Workshop on Dynamic Networks and Knowledge Discovery. ., p. ---

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

2013

Models of human navigation in information networks based on decentralized search

Helic, D., Strohmaier, M., Granitzer, M. & Scherer, R., 2013, ACM Conference on Hypertext and Hypermedia. ., p. 89-98

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Navigational evaluation of breadth first search spanning trees

Helic, D., Strohmaier, M. & Wojcik, W., 2013, Information & Communication Technology Electronics & Microelectronics (MIPRO). ., p. 998-1003

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Predicting Social Interactions from Different Sources of Location-based Knowledge

Steurer, M., Trattner, C. & Helic, D., 2013, The Third International Conference on Social Eco-Informatics. ., p. 8-13

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

2012

Analyzing User Click Paths in a Wikipedia Navigation Game

Helic, D., 2012, Proceedings of MIPRO 2007, International Convention on Information and Communication Technology, Electronics, and Microelectronics. ., p. 374-379

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Evaluation of Folksonomy Induction Algorithms

Strohmaier, M., Helic, D., Benz, D., Körner, C. & Kern, R., 2012, In : ACM Transactions on Intelligent Systems and Technology. 3, 4, p. 74:1-74:2

Research output: Contribution to journalArticleResearchpeer-review

Exploring the differences and similarities between hierarchical decentralized search and human navigation in information networks

Trattner, C., Helic, D., Singer, P. & Strohmaier, M., 2012, (Accepted/In press) Proceedings of the 12th International Conference on Knowledge Management and Knowledge Technologies. .

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

How do Social Networks Influence Learning Outcomes? A Case Study in an Industrial Setting

Maglajlic, S. & Helic, D., 2012, In : Interactive technology and smart education. 9, 2, p. 74-88

Research output: Contribution to journalArticleResearchpeer-review

Navigational Efficiency of Broad vs. Narrow Folksonomies

Helic, D., Körner, C., Granitzer, M., Strohmaier, M. & Trattner, C., 2012, Proceedings of the 23rd ACM Conference on Hypertext and Social Media. NY, New York: Association of Computing Machinery, p. 63-72

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

2011

Building Directories for Social Tagging Systems

Helic, D. & Strohmaier, M., 2011, In 20th ACM Conference on Information and Knowledge Management (CIKM 2011). ., p. 0-0

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Enhancing the Navigability of Social Tagging Systems with Tag Taxonomies

Trattner, C., Körner, C. & Helic, D., 2011, (Accepted/In press) International Conference on Knowledge Management. NY: Association of Computing Machinery

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Implementation of a Wiki-based Information and Communication System for Academia Europaea

Hasani-Mavriqi, I., Helic, D., Leitner, H. & Maurer, H., 2011, Proceedings of the ITI 2011, 33rd International Conference on Information Technology Interfaces. Zagreb: ., p. 193-198

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

On the Construction of Efficiently Navigable Tag Clouds Using Knowledge From Structured Web Content

Trattner, C., Helic, D. & Strohmaier, M., 2011, In : Journal of Universal Computer Science . 17, 4, p. 565-582

Research output: Contribution to journalArticleResearchpeer-review

Pragmatic Evaluation of Folksonomies

Helic, D., Strohmaier, M., Trattner, C., Muhr, M. & Lerman, K., 2011, Proceedings of the 20th international conference on World wide web (WWW '11). NY: Association of Computing Machinery, p. 417-426

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

The Effects of Navigation Tools on the Navigability of Web-Based Information Systems

Helic, D., Hasani-Mavriqi, I., Wilhelm, S. & Strohmaier, M., 2011, Proceedings of the 11th International Conference on Knowledge Management and Knowledge Technologies. New York, NY, USA: Association of Computing Machinery, p. 01-08

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review