Using linked data in purposive social networks

The Web has provided a platform for people to collaborate by using collective intelligence. Messaging boards, Q&A forums are some examples where people broadcast their issues and other people provide solutions. Such communities are defined as a Purposive Social Network (PSN) in this thesis. PSN is a community where people with similar interest and varied expertise come together, use collective intelligence to solve common problems in the community and build tools for common purpose. Usually, Q&A forums are closed or semi-open. The data are controlled by the websites. Difficulties in the search and discovery of information is an issue. People searching for answers or experts in a website can only see results from its own network, while losing a whole community of experts in other websites. Another issue in Q&A forums is not getting any response from the community. There is a long tail of questions that get no answer.The thesis introduces the Suman system that utilises Semantic Web (SW) and Linked Data technologies to solve above challenges. SW technologies are used to structure the community data so it can be decentralized and used across platforms. Linked Data helps to find related information about linked resources. The Suman system uses available tools to solve name entity disambiguation problem and add semantics to the PSN data. It uses a novel combination of semantic keyword search with traditional text search techniques to find similar questions with answers for unanswered questions to expand the query term with added semantics and uses crowd sourced data to rank the results. Furthermore, the Suman system also recommends experts who can answer those questions. This helps to narrow down the long tail of unanswered questions in such communities.The Suman system is designed using the Design Science methodology and evaluated by users in two experiments. The results were statistically analysed to show that the keywords generated by the Suman system were rated higher than the original keywords from the websites. It also showed that the participants agreed with the algorithm rating for answers provided by the Suman system. StackOverflow and Reddit are used as an example of PSN and to build an application as a proof of concept of the Suman system.

[1]  Equating and Scaling , 2010 .

[2]  Aya Soffer,et al.  Social search and discovery using a unified approach , 2009, HT '09.

[3]  Tom Heath,et al.  Linked Data: Evolving the Web into a Global Data Space , 2011, Linked Data.

[4]  Leanne Trembath,et al.  Determinants of success for online communities: an empirical study , 2011 .

[5]  Cliff Lampe,et al.  The Benefits of Facebook "Friends: " Social Capital and College Students' Use of Online Social Network Sites , 2007, J. Comput. Mediat. Commun..

[6]  Z. Popovic,et al.  Crystal structure of a monomeric retroviral protease solved by protein folding game players , 2011, Nature Structural &Molecular Biology.

[7]  Christoph Mangold,et al.  A survey and classification of semantic search approaches , 2007, Int. J. Metadata Semant. Ontologies.

[8]  Adam N. Joinson,et al.  Looking at, looking up or keeping up with people?: motives and use of facebook , 2008, CHI.

[9]  Jaana Kekäläinen,et al.  CIRI-An Ontology-based Query Interface for Text Retrieval , 2004 .

[10]  Jennifer Preece,et al.  Non-public and public online community participation: Needs, attitudes and behavior , 2006, Electron. Commer. Res..

[11]  Sebastian Rudolph,et al.  Ontology-Based Interpretation of Keywords for Semantic Search , 2007, ISWC/ASWC.

[12]  Hugh Glaser,et al.  Managing Co-reference on the Semantic Web , 2009, LDOW.

[13]  Dimitrios A. Koutsomitropoulos,et al.  A Structured Semantic Query Interface for Reasoning-Based Search and Retrieval , 2011, ESWC.

[14]  Vikas Kumar,et al.  CrowdSearch: exploiting crowds for accurate real-time image search on mobile phones , 2010, MobiSys '10.

[15]  Dave Reynolds,et al.  SPARQL basic graph pattern optimization using selectivity estimation , 2008, WWW.

[16]  Dan Brickley,et al.  Resource description framework (RDF) schema specification , 1998 .

[17]  Hosung Park,et al.  What is Twitter, a social network or a news media? , 2010, WWW '10.

[18]  Abeer El-Korany,et al.  Integrated Expert Recommendation Model for Online Communities , 2013, ArXiv.

[19]  David Lazer,et al.  Network Theory and Small Groups , 2004 .

[20]  Matthew Rowe,et al.  Modelling and Analysis of User Behaviour in Online Communities , 2011, SEMWEB.

[21]  Sören Auer,et al.  OntoWiki: A Tool for Social, Semantic Collaboration , 2006, CKC.

[22]  Tao Zhou,et al.  Understanding Online Community User Participation: A Social Influence Perspective , 2011, Internet Res..

[23]  John Langford,et al.  CAPTCHA: Using Hard AI Problems for Security , 2003, EUROCRYPT.

[24]  Kurt Rohloff,et al.  An Evaluation of Triple-Store Technologies for Large Data Stores , 2007, OTM Workshops.

[25]  Jens Lehmann,et al.  DBpedia: A Nucleus for a Web of Open Data , 2007, ISWC/ASWC.

[26]  Alexandre Passant,et al.  Meaning Of A Tag: A collaborative approach to bridge the gap between tagging and Linked Data , 2008, LDOW.

[27]  Tim Berners-Lee,et al.  Linked Data - The Story So Far , 2009, Int. J. Semantic Web Inf. Syst..

[28]  Chong Wang,et al.  SPARK: Adapting Keyword Query to Semantic Search , 2007, ISWC/ASWC.

[29]  Rajeev Motwani,et al.  The PageRank Citation Ranking : Bringing Order to the Web , 1999, WWW 1999.

[30]  David McLean,et al.  An Approach for Measuring Semantic Similarity between Words Using Multiple Information Sources , 2003, IEEE Trans. Knowl. Data Eng..

[31]  Wendy Hall,et al.  The Semantic Web Revisited , 2006, IEEE Intelligent Systems.

[32]  John G. Breslin,et al.  Tag Mediated Society with SCOT Ontology , 2007, Semantic Web Challenge.

[33]  Michael Vitale,et al.  The Wisdom of Crowds , 2015, Cell.

[34]  Michael Schmidt,et al.  Foundations of SPARQL query optimization , 2008, ICDT '10.

[35]  Fernando González-Ladrón-de-Guevara,et al.  Towards an integrated crowdsourcing definition , 2012, J. Inf. Sci..

[36]  Euripides G. M. Petrakis,et al.  Semantic similarity methods in wordNet and their application to information retrieval on the web , 2005, WIDM '05.

[37]  Keith N. Hampton,et al.  Does the Internet Increase, Decrease, or Supplement Social Capital? , 2001 .

[38]  Roy T. Fielding,et al.  Uniform Resource Identifier (URI): Generic Syntax , 2005, RFC.

[39]  Steffen Staab,et al.  SEmantic portAL: The SEAL Approach , 2003, Spinning the Semantic Web.

[40]  Daren C. Brabham.  Crowdsourcing as a Model for Problem Solving , 2008 .

[41]  Maria E. Niessen,et al.  NoiseTube: Measuring and mapping noise pollution with mobile phones , 2009, ITEE.

[42]  Vassilios Peristeras,et al.  Interlinking the Social Web with Semantics , 2008, IEEE Intelligent Systems.

[43]  E. Garfield.  Citation analysis as a tool in journal evaluation. , 1972, Science.

[44]  Ed H. Chi,et al.  Augmented social cognition: using social web technology to enhance the ability of groups to remember, think, and reason , 2009, SIGMOD Conference.

[45]  David C. Parkes,et al.  Designing incentives for online question and answer forums , 2009, EC '09.

[46]  Patrick Hummel,et al.  A game-theoretic analysis of rank-order mechanisms for user-generated content , 2011, EC '11.

[47]  Sanjeev R. Kulkarni,et al.  Wisdom of the Crowd: Incorporating Social Influence in Recommendation Models , 2011, 2011 IEEE 17th International Conference on Parallel and Distributed Systems.

[48]  Rada Mihalcea,et al.  Using WordNet and Lexical Operators to Improve Internet Searches , 2000, IEEE Internet Comput..

[49]  Céline Van Damme,et al.  FolksOntology : An Integrated Approach for Turning Folksonomies into Ontologies , 2007 .

[50]  Kwong-Sak Leung,et al.  A Survey of Crowdsourcing Systems , 2011, 2011 IEEE Third Int'l Conference on Privacy, Security, Risk and Trust and 2011 IEEE Third Int'l Conference on Social Computing.

[51]  Hendrik Blockeel,et al.  Web mining research: a survey , 2000, SKDD.

[52]  Sean R. Eddy,et al.  Profile hidden Markov models , 1998, Bioinform..

[53]  Edward Y. Chang,et al.  Entity Disambiguation with Freebase , 2012, 2012 IEEE/WIC/ACM International Conferences on Web Intelligence and Intelligent Agent Technology.

[54]  Luis von Ahn.  Duolingo: learn a language for free while helping to translate the web , 2013, IUI '13.

[55]  Hinrich Schütze,et al.  Automatic Word Sense Discrimination , 1998, Comput. Linguistics.

[56]  K. Cook,et al.  Social Capital: Theory and Research , 2017 .

[57]  David H. Wolpert,et al.  Collective Intelligence , 1999 .

[58]  Andreas Harth,et al.  Towards Semantically-Interlinked Online Communities , 2005, ESWC.

[59]  Thomas R. Gruber,et al.  Collective knowledge systems: Where the Social Web meets the Semantic Web , 2008, J. Web Semant..

[60]  Jaime G. Carbonell,et al.  Towards Task Recommendation in Micro-Task Markets , 2011, Human Computation.

[61]  Kamel Nebhi,et al.  Named Entity Disambiguation using Freebase and Syntactic Parsing , 2013, LD4IE@ISWC.

[62]  James A. Hendler,et al.  The Semantic Web" in Scientific American , 2001 .

[63]  Marja-riitta Koivunen,et al.  W3C Semantic Web Activity , 2001 .

[64]  Hugh Glaser,et al.  On Coreference and The Semantic Web , 2007 .

[65]  Mark S. Ackerman,et al.  Expertise networks in online communities: structure and algorithms , 2007, WWW '07.

[66]  Silviu Cucerzan,et al.  Large-Scale Named Entity Disambiguation Based on Wikipedia Data , 2007, EMNLP.

[67]  M. McPherson,et al.  Birds of a Feather: Homophily in Social Networks , 2001 .

[68]  Ines Fischer,et al.  Weaving The Web The Original Design And Ultimate Destiny Of The World Wide Web By Its Inventor , 2016 .

[69]  Mohan S. Kankanhalli,et al.  Motivating contributors in social media networks , 2009, WSM@MM.

[70]  Timothy W. Finin,et al.  Swoogle: a search and metadata engine for the semantic web , 2004, CIKM '04.

[71]  Caroline Geck,et al.  The World Factbook , 2017 .

[72]  Hugh Glaser,et al.  RKBExplorer.com: A Knowledge Driven Infrastructure for Linked Data Providers , 2008, ESWC.

[73]  Kevin S. McCurley,et al.  Analysis of anchor text for web search , 2003, SIGIR.

[74]  C. M. Sperberg-McQueen,et al.  Extensible Markup Language (XML) , 1997, World Wide Web J..

[75]  Enrico Motta,et al.  Semantically enriching folksonomies with FLOR , 2008 .

[76]  Harith Alani,et al.  Survey of Tools for Collaborative Knowledge Construction and Sharing , 2007, 2007 IEEE/WIC/ACM International Conferences on Web Intelligence and Intelligent Agent Technology - Workshops.

[77]  Fabrizio Sebastiani,et al.  Machine learning in automated text categorization , 2001, CSUR.

[78]  C. Lee Giles,et al.  Digital Libraries and Autonomous Citation Indexing , 1999, Computer.

[79]  Matthew Richardson,et al.  Building large knowledge bases by mass collaboration , 2003, K-CAP '03.

[80]  Hugh Glaser,et al.  Consuming Multiple Linked Data Sources: Challenges and Experiences , 2010, COLD.

[81]  Ian H. Witten,et al.  An open-source toolkit for mining Wikipedia , 2013, Artif. Intell..

[82]  Kwong-Sak Leung,et al.  Task recommendation in crowdsourcing systems , 2012, CrowdKDD '12.

[83]  Xianpei Han,et al.  Structural Semantic Relatedness: A Knowledge-Based Method to Named Entity Disambiguation , 2010, ACL.

[84]  R. Preston McAfee,et al.  Incentivizing high-quality user-generated content , 2011, WWW.

[85]  Fang Wu,et al.  Social Networks that Matter: Twitter Under the Microscope , 2008, First Monday.

[86]  Jonathan Lazar,et al.  Classification Schema for Online Communities , 1998 .

[87]  Richard Cyganiak,et al.  A relational algebra for SPARQL , 2005 .

[88]  David A. Huffaker,et al.  Dimensions of leadership and social influence in online communities , 2010 .

[89]  Yong Yu,et al.  Exploring folksonomy for personalized search , 2008, SIGIR '08.

[90]  J. Alborsa,et al.  New learning network paradigms: Communities of objectives, crowdsourcing, wikis and open source , 2008, Int. J. Inf. Manag..

[91]  Milan Stankovic,et al.  Looking for Experts? What can Linked Data do for You? , 2010, LDOW.

[92]  Laura A. Dabbish,et al.  Labeling images with a computer game , 2004, AAAI Spring Symposium: Knowledge Collection from Volunteer Contributors.

[93]  Clement T. Yu,et al.  An effective approach to document retrieval via utilizing WordNet and recognizing phrases , 2004, SIGIR '04.

[94]  Huiping Sun,et al.  CQArank: jointly model topics and expertise in community question answering , 2013, CIKM.

[95]  Jianqiang Li,et al.  A path-based approach for web page retrieval , 2011, World Wide Web.

[96]  Olaf Hartig,et al.  The SPARQL Query Graph Model for Query Optimization , 2007, ESWC.

[97]  Ramanathan V. Guha,et al.  SemTag and seeker: bootstrapping the semantic web via automated semantic annotation , 2003, WWW '03.

[98]  Mohsen Afsharchi,et al.  A semantic social network-based expert recommender system , 2013, Applied Intelligence.

[99]  Ulf Leser,et al.  Querying Distributed RDF Data Sources with SPARQL , 2008, ESWC.

[100]  Michael Cardew-Hall,et al.  The folksonomy tag cloud: when is it useful? , 2008, J. Inf. Sci..

[101]  Lada A. Adamic,et al.  The political blogosphere and the 2004 U.S. election: divided they blog , 2005, LinkKDD '05.

[102]  Atul Gupta,et al.  Discovery of technical expertise from open source code repositories , 2013, WWW.

[103]  Eser Kandogan,et al.  Avatar semantic search: a database approach to information retrieval , 2006, SIGMOD Conference.

[104]  Krishna Bharat,et al.  Improved algorithms for topic distillation in a hyperlinked environment , 1998, SIGIR '98.

[105]  Chun Chen,et al.  Music recommendation by unified hypergraph: combining social media information and music content , 2010, ACM Multimedia.

[106]  Edward L. Harris,et al.  Creating Community Online: Negotiating Students' Desires and Needs in Cyberspace. , 1999 .

[107]  Brian Matthews,et al.  Semantic Web Technologies , 2005 .

[108]  Jae Kyeong Kim,et al.  A literature review and classification of recommender systems research , 2012, Expert Syst. Appl..

[109]  Tim O'Reilly,et al.  What is Web 2.0: Design Patterns and Business Models for the Next Generation of Software , 2007 .

[110]  Haixun Wang,et al.  A Distributed Graph Engine for Web Scale RDF Data , 2013, Proc. VLDB Endow..

[111]  Jennifer Preece,et al.  The top five reasons for lurking: improving community experiences for everyone , 2004, Comput. Hum. Behav..

[112]  Harris Wu,et al.  Harvesting social knowledge from folksonomies , 2006, HYPERTEXT '06.

[113]  Mark Newman,et al.  Detecting community structure in networks , 2004 .

[114]  Inna Kouper,et al.  Conversations in the Blogosphere: An Analysis "From the Bottom Up" , 2005, Proceedings of the 38th Annual Hawaii International Conference on System Sciences.

[115]  Alexander Felfernig,et al.  Toward the Next Generation of Recommender Systems: Applications and Research Challenges , 2013 .

[116]  Harith Alani,et al.  ONTOCOPI: Methods and Tools for Identifying Communities of Practice , 2002, Intelligent Information Processing.

[117]  Panagiotis G. Ipeirotis,et al.  Running Experiments on Amazon Mechanical Turk , 2010, Judgment and Decision Making.

[118]  Jürgen Umbrich,et al.  Searching and browsing Linked Data with SWSE: The Semantic Web Search Engine , 2011, J. Web Semant..

[119]  Yun Chi,et al.  Eigen-trend: trend analysis in the blogosphere based on singular value decompositions , 2006, CIKM '06.

[120]  Jure Leskovec,et al.  Steering user behavior with badges , 2013, WWW.

[121]  Anatoliy A. Gruzd,et al.  Online Communities , 2014, Encyclopedia of Social Network Analysis and Mining.

[122]  Jun Peng,et al.  Semantic Information Retrieval Study Based on Knowledge Reasoning , 2009, ICFIE.

[123]  Yu He,et al.  The YouTube video recommendation system , 2010, RecSys '10.

[124]  Lora Aroyo,et al.  CHIP Demonstrator: Semantics-driven Recommendations and Museum Tour Generation , 2007, Semantic Web Challenge.

[125]  J. H. Tufts.  Human Nature and the Social Order. , 1903 .

[126]  Michael D. Buhrmester,et al.  Amazon's Mechanical Turk , 2011, Perspectives on psychological science : a journal of the Association for Psychological Science.

[127]  Matthew Rowe,et al.  Interlinking Distributed Social Graphs , 2009, LDOW.

[128]  Wolfram Wöß,et al.  A Semantic Web middleware for Virtual Data Integration on the Web , 2008, ESWC.

[129]  Enrico Motta,et al.  SemSearch: A Search Engine for the Semantic Web , 2006, EKAW.

[130]  Peter Mika,et al.  Flink: Semantic Web technology for the extraction and analysis of social networks , 2005, J. Web Semant..

[131]  J. Bobadilla,et al.  Recommender systems survey , 2013, Knowl. Based Syst..

[132]  Maryam Fazel-Zarandi,et al.  Expert recommendation based on social drivers, social network analysis, and semantic data representation , 2011, HetRec '11.

[133]  Edward Curry,et al.  Querying linked data graphs using semantic relatedness: A vocabulary independent approach , 2013, Data Knowl. Eng..

[134]  Christian Bizer,et al.  DBpedia spotlight: shedding light on the web of documents , 2011, I-Semantics '11.

[135]  Yun Chi,et al.  Structural and temporal analysis of the blogosphere through community factorization , 2007, KDD '07.

[136]  Albert-László Barabási,et al.  Internet: Diameter of the World-Wide Web , 1999, Nature.

[137]  Zhi Lu,et al.  Categorizing and ranking search engine's results by semantic similarity , 2008, ICUIMC '08.

[138]  Tanya Y. Berger-Wolf,et al.  A framework for community identification in dynamic social networks , 2007, KDD '07.

[139]  Michael S. Bernstein,et al.  4chan and /b/: An Analysis of Anonymity and Ephemerality in a Large Online Community , 2011, ICWSM.

[140]  Jianqiang Li,et al.  Exploiting semantic linkages among multiple sources for semantic information retrieval , 2014, Enterp. Inf. Syst..

[141]  J. Silvertown.  A new dawn for citizen science. , 2009, Trends in ecology & evolution.

[142]  Marco Rosa,et al.  Four degrees of separation , 2011, WebSci '12.

[143]  Lada A. Adamic,et al.  Knowledge sharing and yahoo answers: everyone knows something , 2008, WWW.

[144]  Xiaotao Huang,et al.  A Relation-Based Search Engine in Semantic Web , 2007, IEEE Transactions on Knowledge and Data Engineering.

[145]  David W. Conrath,et al.  Semantic Similarity Based on Corpus Statistics and Lexical Taxonomy , 1997, ROCLING/IJCLCLP.

[146]  F. A. Grootjen,et al.  Conceptual query expansion , 2006, Data Knowl. Eng..

[147]  Yarden Katz,et al.  Pellet: A practical OWL-DL reasoner , 2007, J. Web Semant..

[148]  Jeremy J. Carroll,et al.  Resource description framework (rdf) concepts and abstract syntax , 2003 .

[149]  Markus Krötzsch,et al.  Wikidata , 2014, Commun. ACM.

[150]  Sean R Eddy,et al.  A new generation of homology search tools based on probabilistic inference. , 2009, Genome informatics. International Conference on Genome Informatics.

[151]  Vassilis Christophides,et al.  Generating On the Fly Queries for the Semantic Web: The ICS-FORTH Graphical RQL Interface (GRQL) , 2004, SEMWEB.

[152]  B. Kogut.  The network as knowledge : Generative rules and the emergence of structure , 2000 .

[153]  Eliot R. Smith.  Social relationships and groups: New insights on embodied and distributed cognition , 2008, Cognitive Systems Research.

[154]  Surajit Chaudhuri,et al.  Targeted disambiguation of ad-hoc, homogeneous sets of named entities , 2012, WWW.

[155]  E. Prud hommeaux,et al.  SPARQL query language for RDF , 2011 .

[156]  Eugene Agichtein,et al.  Finding the right facts in the crowd: factoid question answering over social media , 2008, WWW.

[157]  Caroline Haythornthwaite,et al.  Studying Online Social Networks , 2006, J. Comput. Mediat. Commun..

[158]  Vassilis Christophides,et al.  Heuristics-based query optimisation for SPARQL , 2012, EDBT '12.

[159]  Steven Weber,et al.  The Success of Open Source , 2004 .

[160]  Juan-Zi Li,et al.  ArnetMiner: An Expertise Oriented Search System for Web Community , 2007, Semantic Web Challenge.

[161]  Herbert A. Simon,et al.  Applications of machine learning and rule induction , 1995, CACM.

[162]  Stefan Decker,et al.  Produce and Consume Linked Data with Drupal! , 2009, SEMWEB.

[163]  F. Lamberti,et al.  A Relation-Based Page Rank Algorithm for Semantic Web Search Engines , 2009, IEEE Transactions on Knowledge and Data Engineering.

[164]  Razvan C. Bunescu,et al.  Using Encyclopedic Knowledge for Named entity Disambiguation , 2006, EACL.

[165]  Eduardo Mena,et al.  Discovering the Semantics of User Keywords , 2007, J. Univers. Comput. Sci..

[166]  John G. Breslin,et al.  The Future of Social Networks on the Internet: The Need for Semantics , 2007, IEEE Internet Computing.

[167]  Daniel Schwabe,et al.  A hybrid approach for searching in the semantic web , 2004, WWW '04.

[168]  David Gefen,et al.  Virtual Community Attraction: Why People Hang Out Online , 2006, J. Comput. Mediat. Commun..

[169]  Gilad Mishne,et al.  Finding high-quality content in social media , 2008, WSDM '08.

[170]  John G. Breslin,et al.  Weaving SIOC into the Web of Linked Data , 2008, LDOW.

[171]  Koji Zettsu,et al.  Towards Knowledge Management Based on Harnessing Collective Intelligence on the Web , 2006, EKAW.

[172]  Mark H. Chignell,et al.  A social hypertext model for finding community in blogs , 2006, HYPERTEXT '06.

[173]  Alcides Velasquez,et al.  Motivations to participate in online communities , 2010, CHI.

[174]  Brian McBride,et al.  Jena: A Semantic Web Toolkit , 2002, IEEE Internet Comput..

[175]  Jon M. Kleinberg,et al.  Mining the Web's Link Structure , 1999, Computer.

[176]  Weiqi Wang,et al.  The Anatomy and Design of A Semantic Search Engine , 2008 .

[177]  Dan Brickley,et al.  FOAF Vocabulary Specification , 2004 .

[178]  Flavius Frasincar,et al.  Faceted product search powered by the Semantic Web , 2012, Decis. Support Syst..

[179]  Peter R. Monge,et al.  Theories of Communication Networks , 2003 .

[180]  Yorick Wilks,et al.  Sense Tagging: Semantic Tagging with a Lexicon , 1997, ArXiv.

[181]  Ian Horrocks,et al.  OWL-QL - a language for deductive query answering on the Semantic Web , 2004, J. Web Semant..

[182]  Mohsen Jamali,et al.  Different Aspects of Social Network Analysis , 2006, 2006 IEEE/WIC/ACM International Conference on Web Intelligence (WI 2006 Main Conference Proceedings)(WI'06).

[183]  Mikhail R. Kogalovsky.  Ontology-based data access systems , 2012, Programming and Computer Software.

[184]  Ramanathan V. Guha,et al.  Semantic search , 2003, WWW '03.

[185]  David C. Parkes,et al.  The role of game theory in human computation systems , 2009, HCOMP '09.

[186]  Sébastien Ferré,et al.  Semantic Search: Reconciling Expressive Querying and Exploratory Search , 2011, SEMWEB.

[187]  Nigel Shadbolt,et al.  Linked data in crowdsourcing purposive social network , 2013, WWW '13 Companion.

[188]  Haofen Wang,et al.  Q2Semantic: A Lightweight Keyword Interface to Semantic Search , 2008, ESWC.

[189]  Qiang Wang,et al.  Topic oriented community detection through social objects and link analysis in social networks , 2012, Knowl. Based Syst..

[190]  Evgeniy Gabrilovich,et al.  Concept-Based Information Retrieval Using Explicit Semantic Analysis , 2011, TOIS.

[191]  Olivier Corby,et al.  Analysis of a Real Online Social Network Using Semantic Web Frameworks , 2009, SEMWEB.

[192]  Pablo Castells,et al.  An Adaptation of the Vector-Space Model for Ontology-Based Information Retrieval , 2007, IEEE Transactions on Knowledge and Data Engineering.

[193]  Gerald C. Kane.  It's a Network, Not an Encyclopedia: A Social Network Perspective on Wikipedia Collaboration. , 2009 .

[194]  Antonio Maria Rinaldi,et al.  An ontology-driven approach for semantic information retrieval on the Web , 2009, TOIT.

[195]  Jure Leskovec,et al.  Discovering value from community activity on focused question answering sites: a case study of stack overflow , 2012, KDD.

[196]  Sharon L. Milgram,et al.  The Small World Problem , 1967 .

[197]  Roel Wieringa,et al.  Design Science Methodology for Information Systems and Software Engineering , 2014, Springer Berlin Heidelberg.

[198]  Escuela Politécnica Superior,et al.  Semantically enhanced Information Retrieval: an ontology-based approach , 2009 .

[199]  Jon M. Kleinberg,et al.  Group formation in large social networks: membership, growth, and evolution , 2006, KDD '06.

[200]  C. Lintott,et al.  Galaxy Zoo: morphologies derived from visual inspection of galaxies from the Sloan Digital Sky Survey , 2008, 0804.4483.

[201]  Adrian Mocan,et al.  RankIE: Document Retrieval on Ranked Entity Graphs , 2009, Proc. VLDB Endow..

[202]  P. Smith,et al.  A review of ontology based query expansion , 2007, Inf. Process. Manag..

[203]  Mohand Boughanem,et al.  A Personalized Graph-Based Document Ranking Model Using a Semantic User Profile , 2010, UMAP.

[204]  Deborah L. McGuinness,et al.  OWL Web ontology language overview , 2004 .

[205]  Gerard Salton,et al.  A vector space model for automatic indexing , 1975, CACM.

[206]  James Bennett,et al.  The Netflix Prize , 2007 .

[207]  Ricardo Colomo Palacios,et al.  Sem-Fit: A semantic based expert system to provide recommendations in the tourism domain , 2011, Expert Syst. Appl..

[208]  Dorine Andrews,et al.  Audience-specific online community design , 2002, CACM.

[209]  Julita Vassileva,et al.  Motivating participation in social computing applications: a user modeling perspective , 2012, User Modeling and User-Adapted Interaction.

[210]  Ed H. Chi,et al.  Towards a model of understanding social search , 2008, SSM '08.

[211]  Enrico Motta,et al.  AquaLog: An ontology-driven question answering system for organizational semantic intranets , 2007, J. Web Semant..

[212]  Jeff Heflin,et al.  Searching the Web with SHOE , 2000 .

[213]  Eetu Mäkel̈a.  Survey of Semantic Search Research , 2005 .

[214]  Eero Hyvönen,et al.  OntoViews - A Tool for Creating Semantic Web Portals , 2004, International Semantic Web Conference.

[215]  Paolo Rosso,et al.  A WordNet-based Query Expansion Method for Geographical Information Retrieval , 2005, CLEF.

[216]  Lydia B. Chilton,et al.  Tabulator: Exploring and Analyzing linked data on the Semantic Web , 2006 .

[217]  Quentin Jones,et al.  An empirical study of critical mass and online community survival , 2010, CSCW '10.

[218]  T. Landauer,et al.  Indexing by Latent Semantic Analysis , 1990 .

[219]  Dan Cosley,et al.  Think different: increasing online community participation using uniqueness and group dissimilarity , 2004, CHI.

[220]  Orkunt Sabuncu,et al.  An ontology-based retrieval system using semantic indexing , 2010, ICDE Workshops.

[221]  Christoph Treude,et al.  How do programmers ask and answer questions on the web?: NIER track , 2011, 2011 33rd International Conference on Software Engineering (ICSE).

[222]  Jonathan Bishop,et al.  Increasing participation in online communities: A framework for human-computer interaction , 2007, Comput. Hum. Behav..

[223]  C. Lee Giles,et al.  Self-Organization and Identification of Web Communities , 2002, Computer.

[224]  Jenny Preece,et al.  Online Communities: Designing Usability and Supporting Sociability , 2000 .

[225]  Wolfgang Nejdl,et al.  From keywords to semantic queries - Incremental query construction on the semantic web , 2009, J. Web Semant..

[226]  Leo Sauermann,et al.  Cool URIs for the semantic web , 2007 .

[227]  Oscar Corcho,et al.  Preliminary Results in Tag Disambiguation using DBpedia , 2009 .