Christoph Lofi


Dr. Christoph Lofi

Technische Universität Braunschweig
Institut für Informationssysteme
Mühlenpfordtstraße 23, 2.OG 
D-38106 Braunschweig


Phone: +49 (531) 391 7443
Room: 233


I worked at IFIS from 2008 to 2016. Currently, I am an Assistant Professor at Web Information Systems Group at TU Delft.
My research focus is on exploring novel human-centered query paradigms (like analogy queries), incorporating crowd-sourcing into information systems research, applications of novel query paradigms in e-commerce and e-business, and database query personalization (e.g. Skyline queries).

Have a look at our new poster gallery to give you an idea:

Short CV

starting April 2016: Assistant Professor Delft University of Technology
2014-2016: PostDoc at Technische Universität Braunschweig
2012-2014: PostDoc at National Institute of Informatics, Tokyo, Japan
2011-2012: PostDoc at Technische Universität Braunschweig
2011: Defense of Doctoral Thesis at Technische Universität Braunschweig
2008-2011: Ph.D. Researcher at Technische Universit Braunschweig
2006-2008: Ph.D. Researcher Researcher at L3S Research Center, Leibniz University Hannover
2005: Diploma Thesis at Collaborative Software Development Laboratory, University of Hawai’i, Honolulu - Manoa, Certificate issued by University Kaiserslautern
2002-2004: Assistant Researcher at Fraunhofer Institute for Experimental Software Engineering, Kaiserslautern 
2000-2004: Student at University Kaiserslautern


I was the lecturer for the following lectures:

From 2010 to 2014, I was also a member of the steering commitee of the ITIS graduate school.



(2012-2015) in MovieExplore - Discovering Movies in a Human-Centric Fashion

project management

This project focuses on discovering the perceptual properties of movies (and also other experience items) for enabeling human-centric interaction paradigms. This will allow users to interact with complex product spaces in a more natural and easier to understand fashion. 



(2015) SQL-Alchemist 

project management

SQL Alchemist Logo

This project is funded by the presidential office of TU Braunschweig in order to foster and encourage innovation in university didactics. In this project, we develop novel concepts for teaching relational query languages like SQL, unifying approaches from modern didactics with mobile gamification. The goal of this project is to develop and establish a “serious” online game for supporting the B.Sc. lecture “Relational Databases 1”

see (in German)


(2013-2015) Anaqonda Project - Analogy Queries by Ontology-based Data Analytics

project management


The Anaqonda project deals with intelligent queries und personalization, and focuses especially on analogy queries. This project was funded by DAAD and executed at NII Tokyo.

For more information, see


(2006-2010) APIS - Advanced Personalization in Information Services

project member


The APIS project (Advanced Personalization in Information Services) investigates the impact of personalization technology on future information provisioning. Being interdisciplinary between computer science and cognitive sciences a basic belief of the APIS group is that modern information provisioning needs advanced query processing and optimization techniques using and understanding human preferences, usage patterns, conceptual views and (domain) ontologies. At the same time the architectures for information provisioning have to move from monolithical database systems to more open service-oriented infrastructures.
Source Code for our Skyline Simulator & Datasets can be found here.
For more information, see​


(2006 - 2008)  Prolix - Process Oriented Learning and Information Exchange

project member



(2005) Hackystat

project member


Balke, W. - T., C. Lofi, and U. Güntzer, "Incremental Trade-Off Management for Preference Based Queries", International Journal of Computer Science & Applications (IJCSA), vol. 4, no. 2, 06/2007. Abstract  Download: Fulltext-PDF (572.96 KB)
Balke, W. - T., C. Lofi, and U. Güntzer, "User Interaction Support for Incremental Refinement of Preference-Based Queries", 1st IEEE International Conference on Research Challenges in Information Science (RCIS), Ouarzazate, Morocco, 04/2007. Abstract  Download: Fulltext-PDF (643.83 KB)
Lofi, C., D. Olmedilla, O. Papapetrou, W. Siberski, J. L. D. Coi, A. Kösling, and E. Herder, "A Model for Competence Gap Analysis", 3rd International Conference on Web Information Systems and Technologies (WEBIST), Barcelona, Spain, 03/2007. Abstract  Download: Fulltext-PDF (103.53 KB)
Balke, W. - T., C. Lofi, and U. Güntzer, "Eliciting Matters - Controlling Skyline Sizes by Incremental Integration of User Preferences", 12th International Conference on Database Systems for Advanced Applications (DASFAA), Bangkok, Thailand, 2007. Abstract  Download: dasfaa07-camRed.pdf (393.17 KB)
Lofi, C., "cGQM - Ein zielorientierter Ansatz für kontinuierliche, automatisierte Messzyklen", Proceedings of the 4th National Conference on Software Measurement and Metrics (DASMA MetriKon 2005), Kaiserslautern, Germany, GI, 11/2005. Abstract  Download: 
Lofi, C., "Continuous GQM: An automated measurement framework for the GQM paradigm", Fachbereich Informatik, Kaiserslautern, Germany, University Kaiserslautern, 08/2005. Abstract  Download: metrikon05-cGQM.pdf (1.33 MB)