TY  - GEN
A1  - Alhosseini Almodarresi Yasin, Seyed Ali
A1  - Bin Tareaf, Raad
A1  - Najafi, Pejman
A1  - Meinel, Christoph
T1  - Detect me if you can
BT  - Spam Bot Detection Using Inductive Representation Learning
T2  - Companion Proceedings of The 2019 World Wide Web Conference
N2  - Spam Bots have become a threat to online social networks with their malicious behavior, posting misinformation messages and influencing online platforms to fulfill their motives. As spam bots have become more advanced over time, creating algorithms to identify bots remains an open challenge. Learning low-dimensional embeddings for nodes in graph structured data has proven to be useful in various domains. In this paper, we propose a model based on graph convolutional neural networks (GCNN) for spam bot detection. Our hypothesis is that to better detect spam bots, in addition to defining a features set, the social graph must also be taken into consideration. GCNNs are able to leverage both the features of a node and aggregate the features of a node’s neighborhood. We compare our approach, with two methods that work solely on a features set and on the structure of the graph. To our knowledge, this work is the first attempt of using graph convolutional neural networks in spam bot detection.
KW  - Social Media Analysis
KW  - Bot Detection
KW  - Graph Embedding
KW  - Graph Convolutional Neural Networks
Y1  - 2019
SN  - 978-1-4503-6675-5
U6  - https://doi.org/10.1145/3308560.3316504
SP  - 148
EP  - 153
PB  - Association for Computing Machinery
CY  - New York
ER  - 
TY  - JOUR
A1  - Gericke, Lutz
A1  - Gumienny, Raja
A1  - Meinel, Christoph
T1  - Tele-board : folow the traces of your design process history
Y1  - 2012
ER  - 
TY  - JOUR
A1  - Grünewald, Franka
A1  - Meinel, Christoph
T1  - Implementation and Evaluation of Digital E-Lecture Annotation in Learning Groups to Foster Active Learning
JF  - IEEE transactions on learning technologies
N2  - The use of video lectures in distance learning involves the two major problems of searchability and active user participation. In this paper, we promote the implementation and usage of a collaborative educational video annotation functionality to overcome these two challenges. Different use cases and requirements, as well as details of the implementation, are explained. Furthermore, we suggest more improvements to foster a culture of participation and an algorithm for the extraction of semantic data. Finally, evaluations in the form of user tests and questionnaires in a MOOC setting are presented. The results of the evaluation are promising, as they indicate not only that students perceive it as useful, but also that the learning effectiveness increases. The combination of personal lecture video annotations with a semantic topic map was also evaluated positively and will thus be investigated further, as will the implementation in a MOOC context.
KW  - eLectures
KW  - tele-teaching
KW  - video annotation
KW  - collaborative learning
Y1  - 2015
U6  - https://doi.org/10.1109/TLT.2015.2396042
SN  - 1939-1382
VL  - 8
IS  - 3
SP  - 286
EP  - 298
PB  - Inst. of Electr. and Electronics Engineers
CY  - Los Alamitos
ER  - 
TY  - JOUR
A1  - Gumienny, Raja
A1  - Gericke, Lutz
A1  - Wenzel, Matthias
A1  - Meinel, Christoph
T1  - Tele-board in use : applying aq digital whiteboard system in different situations and setups
Y1  - 2012
SN  - 978-3-642-31990-7
ER  - 
TY  - JOUR
A1  - Gumienny, Raja
A1  - Meinel, Christoph
A1  - Gericke, Lutz
A1  - Quasthoff, Matthias
A1  - LoBue, Peter
A1  - Willems, Christian
T1  - Tele-board : enabling efficient collaboration in digital design spaces across time and distance
Y1  - 2011
SN  - 978-3-642-13756-3
ER  - 
TY  - JOUR
A1  - Jobst, Birgit
A1  - Köppen, Eva
A1  - Lindberg, Tilmann
A1  - Moritz, Josephine
A1  - Rhinow, Holger
A1  - Meinel, Christoph
T1  - The faith-factor in design thinking : creative confidence through education at the design thinking schools Potsdam and Standford?
Y1  - 2012
SN  - 978-3-642-31990-7
ER  - 
TY  - GEN
A1  - Klieme, Eric
A1  - Tietz, Christian
A1  - Meinel, Christoph
T1  - Beware of SMOMBIES
BT  - Verification of Users based on Activities while Walking
T2  - The 17th IEEE International Conference on Trust, Security and Privacy in Computing and Communications (IEEE TrustCom 2018)/the 12th IEEE International Conference on Big Data Science and Engineering (IEEE BigDataSE 2018)
N2  - Several research evaluated the user's style of walking for the verification of a claimed identity and showed high authentication accuracies in many settings. In this paper we present a system that successfully verifies a user's identity based on many real world smartphone placements and yet not regarded interactions while walking. Our contribution is the distinction of all considered activities into three distinct subsets and a specific one-class Support Vector Machine per subset. Using sensor data of 30 participants collected in a semi-supervised study approach, we prove that unsupervised verification is possible with very low false-acceptance and false-rejection rates. We furthermore show that these subsets can be distinguished with a high accuracy and demonstrate that this system can be deployed on off-the-shelf smartphones.
KW  - gait
KW  - authentication
KW  - smartphone
KW  - activities
KW  - verification
KW  - behavioral
KW  - continuous
Y1  - 2018
SN  - 978-1-5386-4387-7
SN  - 978-1-5386-4389-1
U6  - https://doi.org/10.1109/TrustCom/BigDataSE.2018.00096
SN  - 2324-9013
SP  - 651
EP  - 660
PB  - IEEE
CY  - New York
ER  - 
TY  - BOOK
A1  - Linckels, Serge
A1  - Meinel, Christoph
T1  - E-Librarian service : user-friendly semantic search in digital libraries
Y1  - 2011
SN  - 978-3-642-17742-2
U6  - https://doi.org/10.1007/978-3-642-17743-9
PB  - Springer-Verlag Berlin Heidelberg
CY  - Berlin, Heidelberg
ER  - 
TY  - JOUR
A1  - Lindberg, Tilmann
A1  - Köppen, Eva
A1  - Rauth, Ingo
A1  - Meinel, Christoph
T1  - On the perection, adoption and Implementation of design thinking in the IT industry
Y1  - 2012
ER  - 
TY  - JOUR
A1  - Lindberg, Tilmann
A1  - Meinel, Christoph
A1  - Wagner, Ralf
T1  - Design thinking : a fruitful concept for IT development?
Y1  - 2011
SN  - 978-3-642-13756-3
ER  - 
TY  - JOUR
A1  - Meinel, Christoph
A1  - Klotz, Volker
T1  - The first 10 years of the ECCC digital library
Y1  - 2006
UR  - http://portal.acm.org/cacm
U6  - https://doi.org/10.1145/1107458.1107484
ER  - 
TY  - JOUR
A1  - Meinel, Christoph
A1  - Leifer, Larry
T1  - Design thinking research
Y1  - 2012
SN  - 978-3-642-31990-7
ER  - 
TY  - JOUR
A1  - Meinel, Christoph
A1  - Leifer, Larry
T1  - Design thinking research
Y1  - 2011
SN  - 978-3-642-13756-3
ER  - 
TY  - JOUR
A1  - Meinel, Christoph
A1  - Leifer, Larry
T1  - Design thinking research
Y1  - 2012
ER  - 
TY  - BOOK
A1  - Meinel, Christoph
A1  - Sack, Harald
T1  - Internetworking : technische Grundlagen und Anwendungen
Y1  - 2012
SN  - 978-3-540-92939-0
U6  - https://doi.org/10.1007/978-3-540-92940-6
PB  - Springer-Verlag Berlin Heidelberg
CY  - Berlin, Heidelberg
ER  - 
TY  - GEN
A1  - Meinel, Christoph
A1  - Sack, Harald
T1  - WWW : Kommunikation, Internetworking, Web-Technologien
Y1  - 2004
SN  - 3-540-44276-6
SN  - 1439-5428
PB  - Springer
CY  - Berlin
ER  - 
TY  - BOOK
A1  - Meinel, Christoph
A1  - Sack, Harald
T1  - Digitale Kommunikation : Vernetzen, Multimedia, Sicherheit
T3  - Media Press
Y1  - 2009
SN  - 978-3-540-92922-2
U6  - https://doi.org/10.1007/978-3-540-92923-9
SN  - 1439-3107
PB  - Springer-Verlag Berlin Heidelberg
CY  - Berlin, Heidelberg
ER  - 
TY  - JOUR
A1  - Meinel, Christoph
A1  - Wang, Long
T1  - Building content clusters based on modelling page pairs
N2  - We give a new view on building content clusters from page pair models. We measure the heuristic importance within every two pages by computing the distance of their accessed positions in usage sessions. We also compare our page pair models with the classical pair models used in information theories and natural language processing, and give different evaluation methods to build the reasonable content communities. And we finally interpret the advantages and disadvantages of our models from detailed experiment results
Y1  - 2006
UR  - http://www.springerlink.com/content/105633/
U6  - https://doi.org/10.1007/11610113_85
ER  - 
TY  - JOUR
A1  - Noweski, Christine
A1  - Scheer, Andrea
A1  - Büttner, Nadja
A1  - Thienen, Julia von
A1  - Erdmann, Johannes
A1  - Meinel, Christoph
T1  - Towards a paradigm shift in education practice : developing twenty-first century skills with design thinking
Y1  - 2012
SN  - 978-3-642-31990-7
ER  - 
TY  - JOUR
A1  - Thienen, Julia von
A1  - Noweski, Christine
A1  - Meinel, Christoph
A1  - Lang, Sabine
A1  - Nicolai, Claudia
A1  - Bartz, Andreas
T1  - What can design thinking learn from behavior group theraphy?
Y1  - 2012
SN  - 978-3-642-31990-7
ER  - 
TY  - JOUR
A1  - Thienen, Julia von
A1  - Noweski, Christine
A1  - Meinel, Christoph
A1  - Rauth, Ingo
T1  - The co-evolution of theory and practice in design thinking - or - "Mind the oddness trap!"
Y1  - 2011
SN  - 978-3-642-13756-3
ER  - 
TY  - JOUR
A1  - Thienen, Julia von
A1  - Noweski, Christine
A1  - Rauth, Ingo
A1  - Meinel, Christoph
A1  - Lange, Sabine
T1  - If you want to know who are, tell me where you are : the importance of places
Y1  - 2012
ER  -