Publications

2017

Jan-Christoph Kalo, Christoph Lofi, René Pascal Maseli, and Wolf-Tilo Balke. "Semantic Query Processing: Estimating Relational Purity". In Lernen Wissen Daten Analysen (LWDA) Conference. Rostock, Germany, sep 2017. PDF.

Yue Zhao, Christoph Lofi, and Claudia Hauff. "Scalable Mind-Wandering Detection for MOOCs: A Webcam-Based Approach". In European Conf. on Technology Enhanced Learning (EC-TEL). Tallinn, Estonia, sep 2017. PDF.

Mengmeng Ye, Christoph Lofi, and Nava Tintarev. "Memorability of Semantically Grouped Online Reviews". In Semantics 2017. Amsterdam, Netherlands, sep 2017. PDF.

Sepideh Mesbah, Kyriakos Fragkeskos, Christoph Lofi, Alessandro Bozzon, and Geert-Jan Houben. "Facet Embeddings for Explorative Analytics in Digital Libraries". In Int. Conf. on Theory and Practice of Digital Libraries (TPDL). Thessaloniki, Greece, sep 2017. PDF.

Christoph Lofi and Nava Tintarev. "Towards Analogy-based Recommendation: Benchmarking of Perceived Analogy Semantics". In Workshop on Recommendation in Complex Scenarios @ RecSys. Como, Italy, aug 2017. PDF.

Nava Tintarev and Christoph Lofi. "Sequences of Diverse Song Recommendations". In User Modelling, Adaptation and Personalization (UMAP). Bratislava, Slovakia, jul 2017. PDF.

Yue Zhao, Dan Davis, Guanliang Chen, Christoph Lofi, Claudia Hauff, and Geert-Jan Houben. "Certificate Achievement Unlocked: How Does MOOC Learners' Behaviour Change?". In User Modelling, Adaptation and Personalization (UMAP), 83–88. Bratislava, Slovakia, jul 2017. PDF.

Sepideh Mesbah, Kyriakos Fragkeskos, Christoph Lofi, Alessandro Bozzon, and Geert Jan Houben. "Semantic annotation of data processing pipelines in scientific publications". In Extended Semantic Web Conference (ESWC), volume 10249 LNCS, 321–336. Portoroz, Slovenia, may 2017. PDF, DOI.

Sepideh Mesbah, Alessandro Bozzon, Christoph Lofi, and Geert-Jan Houben. "Describing data processing pipelines in scientific publications for Big Data injection". In Workshop on Scholary Web Mining (SWM). Cambridge, UK, feb 2017. PDF, DOI.

2016

Christoph Lofi and Wolf-tilo Balke. "Large Scale Cooperation Scenarios – Crowdsourcing and its Societal Implication". Transactions on Internet Research (TIR), 12(1):03–14, jan 2016. PDF.

Christoph Lofi. "Towards Human-Centered Database Query Processing using on Perceptual Properties". In Dutch-Belgian DataBase Day (DBDBD). Mons, Belgium, 2016. PDF.

Christoph Lofi. "Measuring Semantic Similarity and Relatedness with Distributional and Knowledge-based Approaches". Database Society of Japan (DBSJ) Journal, 14(3):1–9, 2016. PDF, DOI.

Christoph Lofi, Athiq Ahamed, Pratima Kulkarni, and Ravi Thakkar. "Benchmarking semantic capabilities of analogy querying algorithms". In Int. Conf. on Database Systems for Advanced Applications (DASFAA), volume 9642, 463–478. Dallas, TX, USA, 2016. PDF, DOI.

2015

Nestor Alvaro, Mike Conway, Son Doan, Christoph Lofi, John Overington, and Nigel Collier. "Crowdsourcing Twitter annotations to identify first-hand experiences of prescription drug use". Journal of Biomedical Informatics, 58:280–287, nov 2015. PDF.

Christoph Lofi and Philipp Wille. "Exploiting social judgements in big data analytics". In 13th Lernen Wissen Adaption (LWA) Conference, volume 1458, 444–455. Trier, Germany, oct 2015. PDF.

Philipp Wille, Christoph Lofi, and Wolf-Tilo Balke. "Towards Narrative Information Systems". In Web-Age Information Management (WAIM). Qingdao, Shandong, China, jun 2015. PDF.

Kinda El Maarry. "Crowdsourcing for Query Processing on Web Data: A Case Study on the Skyline Operator". Journal of Computing and Information Technology (CIT), mar 2015. PDF.

Christoph Lofi and Christian Nieke. "I would like to watch something like ‘The Terminator'…” Cooperative Query Personalization Based on Perceptual Similarity". In 18th International Conference on Extending Database Technology (EDBT). Brussels, Belgium, 2015. PDF.

2014

Jiyin He, Kai Kunze, Christoph Lofi, K. Madria Sanjay, and Stephan Sigg. "Towards Mobile Sensor-Aware Crowdsourcing: Architecture, Opportunities and Challenges". In DASFAA Workshop on Uncertain and Crowdsourced Data. Bali, Indonesia, 2014. PDF.

Christoph Lofi and Christian Nieke. "Exploiting Perceptual Similarity: Privacy-Preserving Cooperative Query Personalization". In Int. Conf. on Web Information System Engineering (WISE). Thessaloniki, Greece, 2014. PDF.

C. Lofi, C. Nieke, and N. Collier. "Discriminating Rhetorical Analogies in Social Media". In Conf. of the Europ. Chapter of the Association for Computational Linguistics (EACL). Gothenburg, Sweden, 2014. PDF.

Christoph Lofi and Kinda El Maarry. "Design Patterns for Hybrid Algorithmic-Crowdsourcing Workflows". In 16th IEEE Conf. on Business Informatics (CBI). Geneva, Switzerland, 2014. PDF.

2013

Christoph Lofi, Kinda El Maarry, and Wolf-Tilo Balke. "Skyline Queries over Incomplete Data - Error Models for Focused Crowd-Sourcing". In Int. Conf. on Conceptual Modeling (ER). Hong Kong, China, 2013. PDF.

Christoph Lofi, Kinda El Maarry, and Wolf-Tilo Balke. "Skyline Queries in Crowd-Enabled Databases". In Int. Conf. on Extending Database Technology (EDBT). Genoa, Italy, 2013. PDF.

Christoph Lofi and Christian Nieke. "Modeling Analogies for Human-Centered Information Systems". In 5th Int. Conf. On Social Informatics (SocInfo). Kyoto, Japan, 2013. PDF.

Christoph Lofi. "Just ask a human? – Controlling Quality in Relational Similarity and Analogy Processing using the Crowd". In CDIM Workshop at Database Systems for Business Technology and Web (BTW). Magdeburg, Germany, 2013. PDF.

Christoph Lofi. "Analogy Queries in Information Systems – A New Challenge". Journal of Information & Knowledge Management (JIKM), 2013. PDF.

2012

Christoph Lofi and Ralf Krestel. "iParticipate: Automatic Tweet Generation from Local Government Data". In 17th International Conference on Database Systems for Advanced Applications (DASFAA). Busan, South Korea, 2012. PDF.

Joachim Selke, Christoph Lofi, and Wolf-Tilo Balke. "Pushing the Boundaries of Crowd-Enabled Databases with Query-Driven Schema Expansion". Int. Conf. on Very Large Data Bases (VLDB), 5(2):538–549, 2012. PDF.

Christoph Lofi and Wolf-Tilo Balke. "On Skyline Queries and how to Choose from Pareto Sets". In Advanced Query Processing in Intelligent Systems Reference Library (ISRL 36), chapter 2, pages 15–36. Springer, 2012. PDF.

Christoph Lofi, Wolf-Tilo Balke, and Ulrich Güntzer. "Malleability-Aware Skyline Computation on Linked Open Data". In 17th International Conference on Database Systems for Advanced Applications (DASFAA). Busan, South Korea, 2012. PDF.

Christoph Lofi, Joachim Selke, and Wolf-Tilo Balke. "Information Extraction Meets Crowdsourcing: A Promising Couple". Datenbank-Spektrum, 2012. PDF, DOI.

Christoph Lofi, Wolf-tilo Balke, and Ulrich Güntzer. "Equivalence Heuristics for Malleability-Aware Skylines". Journal of Computing Science and Engineering (JCSE), 6(3):207–218, 2012. PDF.

2011

Silviu Homoceanu, Michael Loster, Christoph Lofi, and Wolf-tilo Balke. "Will I like it ? – Providing Product Overviews based on Opinion Excerpts". In IEEE Conference on Commerce and Enterprise Computing (CEC). Luxembourg, Luxembourg, 2011. PDF.

Christoph Lofi, Wolf-Tilo Balke, and Ulrich Güntzer. "Eliciting Customer Wishes using Example-Based Heuristics in E-Commerce Applications". In IEEE Conference on Commerce and Enterprise Computing (CEC). Luxembourg, Luxembourg, 2011. PDF.

Christoph Lofi. "Choosing the Right Thing: Cooperative Trade-Off Enhanced Skyline Queries". In PhD Workshop at the 28th International Conference On Data Engineering (ICDE). Hannover, Germany, 2011. PDF.

2010

Christoph Lofi and Wolf-Tilo Balke. "Preference Trade-Offs – Towards Manageable Skylines". In 22. GI-Workshop Grundlagen von Datenbanken (GvD). Bad Helmstedt, Germany, 2010. PDF.

Christoph Lofi, Christian Nieke, and Wolf-Tilo Balke. "Mobile Product Browsing Using Bayesian Retrieval". In IEEE Conf. Commerce and Enterprise Comp. (CEC). Shanghai, China, 2010. PDF.

Joachim Selke, Christoph Lofi, and Wolf-Tilo Balke. "Highly Scalable Multiprocessing Algorithms for Preference-Based Database Retrieval". In 15th International Conference on Database Systems for Advanced Applications (DASFAA). Tsukuba, Japan, 2010. PDF.

Christoph Lofi, Ulrich Güntzer, and Wolf-Tilo Balke. "Efficient Computation of Trade-Off Skylines". In 13th International Conference on Extending Database Technology (EDBT). Lausanne, Switzerland, 2010. PDF.

2009

Christoph Lofi, Wolf-Tilo Balke, and Ulrich Güntzer. "Efficient Skyline Refinement Using Trade-Offs". In 3rd International IEEE Conference on Research Challenges in Information Science (RCIS). Fès, Morocco, 2009. PDF, DOI.

Christoph Lofi, Wolf-Tilo Balke, and Ulrich Güntzer. "Efficient Skyline Refinement Using Trade-Offs Respecting Don't-Care Attributes". International Journal of Computer Science and Applications (IJCSA), 6(5):1–29, 2009. PDF.

2008

Christoph Lofi, W.-T. Wolf-Tilo Balke, Ulrich Güntzer, and U. Guntzer. "Efficiently Performing Consistency Checks for Multi-Dimensional Preference Trade-Offs". In 2nd International IEEE Conference on Research Challenges in Information Science (RCIS), volume 5, 271–278. Marakech, Morocco, 2008. IEEE. PDF, DOI.

Christoph Lofi, Wolf-Tilo Balke, and Ulrich Güntzer. "Consistency Check Algorithms for Multi-Dimensional Preference Trade-Offs". International Journal of Computer Science & Applications (IJCSA), 5(3):165–185, 2008. PDF.

2007

Wolf-Tilo Balke, Christoph Lofi, and Ulrich Güntzer. "User Interaction Support for Incremental Refinement of Preference-Based Queries". In 1st International IEEE Conference on Research Challenges in Information Science (RCIS). Ouarzazate, Morocco, 2007. PDF.

Christoph Lofi and Wolf Siberski. "Service Oriented Architectures for Open E-Learning Systems: An Overview of the Prolix Project". In eTeaching & eScience. Hannover, Germany, 2007. PDF.

Wolf-Tilo Balke, Christoph Lofi, and Ulrich Güntzer. "Incremental Trade-Off Management for Preference Based Queries". International Journal of Computer Science & Applications (IJCSA), 4(2):75–91, 2007. PDF.

Wolf-Tilo Balke, Ulrich Güntzer, and Christoph Lofi. "Eliciting Matters - Controlling Skyline Sizes by Incremental Integration of User Preferences". In 12th International Conference on Database Systems for Advanced Applications (DASFAA). Bangkok, Thailand, 2007. PDF.

Juri L. De Coi, Eelco Herder, Arne Koesling, Christoph Lofi, Daniel Olmedilla, Odysseas Papapetrou, and Wolf Siberski. "A Model for Competence Gap Analysis". In 3rd International Conference on Web Information Systems and Technologies (WEBIST). Barcelona, Spain, 2007. PDF, DOI.

2005

Christoph Lofi. "cGQM - Ein zielorientierter Ansatz für kontinuierliche, automatisierte Messzyklen". In 4th National Conference on Software Measurement and Metrics (DASMA MetriKon 2005). Kaiserslautern, Germany, 2005. PDF.

Christoph Lofi