@article{467, abstract = {{Financial benefits are an important factor when cloud infrastructure is considered to meet processing demand. The dynamics of on-demand pricing and service usage are investigated in a two-stage game model for a monopoly Infrastructure-as-a-Service (IaaS) market. The possibility of hybrid clouds (public clouds plus own infrastructure) turns out to be essential in order that not only the provider but also the clients have significant benefits from on-demand services. Even if the client meets all demand in the public cloud, the threat of building a hybrid cloud keeps the instance price low. This is not the case when reserved instances are offered as well. Parameters like load profiles and economies of scale have a huge effect on likely future pricing and on a cost-optimal split-up of client demand between either a client’s own data center and a public cloud service or between reserved and on-demand cloud instances.}}, author = {{Künsemöller, Jörn and Karl, Holger}}, journal = {{Future Generation Computer Systems}}, pages = {{44----52}}, publisher = {{Elsevier}}, title = {{{A Game-Theoretic Approach to the Financial Benefits of Infrastructure-as-a-Service}}}, doi = {{10.1016/j.future.2014.03.005}}, year = {{2014}}, } @article{7268, author = {{Klenke, Markus and Grieger, Marvin}}, journal = {{DOAG News}}, number = {{3}}, pages = {{38--42}}, title = {{{Forms2ADF mal anders: Wie aus einer Oracle-Vision Praxis wird}}}, year = {{2014}}, } @article{7269, author = {{Grieger, Marvin and Fazal-Baqaie, Masud and Sauer, Stefan and Klenke, Markus}}, journal = {{Softwaretechnik-Trends, Proceedings of the 16th Workshop Software-Reengineering (WSRE)}}, number = {{2}}, pages = {{77--78}}, title = {{{A Method to Systematically Improve the Effectiveness and Efficiency of the Semi-Automatic Migration of Legacy Systems}}}, volume = {{34}}, year = {{2014}}, } @article{7270, author = {{Grieger, Marvin and Sauer, Stefan and Klenke, Markus}}, journal = {{Softwaretechnik-Trends, Proceedings of the 2nd Workshop Model-Based and Model-Driven Software Modernization (MMSM)}}, number = {{2}}, pages = {{44--45}}, title = {{{Architectural Restructuring by Semi-Automatic Clustering to Facilitate Migration towards a Service-oriented Architecture}}}, volume = {{34}}, year = {{2014}}, } @article{753, author = {{Beister, Frederic and Dräxler, Martin and Aelken, J. and Karl, Holger}}, journal = {{Computer Communications}}, pages = {{77----85}}, title = {{{Power model design for ICT systems -- A generic approach}}}, doi = {{10.1016/j.comcom.2014.02.007}}, year = {{2014}}, } @article{754, author = {{Azeem M. Khan, Rana and Karl, Holger}}, journal = {{IEEE Communications Surveys and Tutorials}}, number = {{1}}, pages = {{46----63}}, title = {{{MAC Protocols for Cooperative Diversity in Wireless LANs and Wireless Sensor Networks}}}, doi = {{10.1109/SURV.2013.042313.00067}}, year = {{2014}}, } @inproceedings{759, author = {{Dräxler, Martin and Dreimann, Philipp and Karl, Holger}}, booktitle = {{IEEE Online Conference on Green Communications, OnlineGreenComm 2014, November 12-14, 2014}}, pages = {{1----7}}, title = {{{Anticipatory power cycling of mobile network equipment for high demand multimedia traffic}}}, doi = {{10.1109/OnlineGreenCom.2014.7114415}}, year = {{2014}}, } @inproceedings{760, author = {{Auroux, Sebastien and Karl, Holger}}, booktitle = {{25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, {PIMRC} 2014, Washington DC, USA, September 2-5, 2014}}, pages = {{1294----1299}}, title = {{{Flow processing-aware controller placement in wireless DenseNets}}}, doi = {{10.1109/PIMRC.2014.7136368}}, year = {{2014}}, } @inproceedings{762, author = {{Schwabe, Arne and Karl, Holger}}, booktitle = {{Proceedings of the third workshop on Hot topics in software defined networking, HotSDN '14, Chicago, Illinois, USA, August 22, 2014}}, pages = {{115----120}}, title = {{{Using MAC addresses as efficient routing labels in data centers}}}, doi = {{10.1145/2620728.2620730}}, year = {{2014}}, } @inproceedings{763, author = {{Blanckenstein, Johannes and Karl, Holger}}, booktitle = {{22nd International Conference on Software, Telecommunications and Computer Networks, SoftCOM 2014, Split, Croatia, September 17-19, 2014}}, pages = {{408----413}}, title = {{{Energy-efficient clock synchronization using wake-up receivers}}}, doi = {{10.1109/SOFTCOM.2014.7039090}}, year = {{2014}}, } @inproceedings{765, author = {{Beister, Frederic and Karl, Holger}}, booktitle = {{IEEE 10th International Conference on Wireless and Mobile Computing, Networking and Communications, WiMob 2014, Larnaca, Cyprus, October 8-10, 2014}}, pages = {{359----364}}, title = {{{Predicting mobile video inter-download times with Hidden Markov Models}}}, doi = {{10.1109/WiMOB.2014.6962195}}, year = {{2014}}, } @unpublished{766, author = {{Mehraghdam, Sevil and Keller, Matthias and Karl, Holger}}, booktitle = {{CoRR}}, title = {{{Specifying and Placing Chains of Virtual Network Functions}}}, year = {{2014}}, } @unpublished{767, author = {{Wette, Philip and Karl, Holger}}, booktitle = {{CoRR}}, title = {{{DCT²Gen: A Versatile TCP Traffic Generator for Data Centers}}}, year = {{2014}}, } @unpublished{768, author = {{Schwabe, Arne and Karl, Holger}}, booktitle = {{CoRR}}, title = {{{Adding Geographical Embedding to AS Topology Generation}}}, year = {{2014}}, } @inbook{8550, author = {{Liebendörfer, Michael and Ostsieker, Laura}}, booktitle = {{Mit Werkzeugen Mathematik und Stochastik lernen – Using Tools for Learning Mathematics and Statistics}}, editor = {{Wassong, Thomas and Frischemeier, Daniel and Fischer, Pascal R. and Hochmuth, Reinhard and Bender, Peter}}, isbn = {{978-3-658-03103-9 978-3-658-03104-6}}, pages = {{453--462}}, publisher = {{Springer Fachmedien Wiesbaden}}, title = {{{Mathematik als Werkzeug: Sicht- und Arbeitsweisen von Studierenden am Anfang ihres Mathematikstudiums}}}, year = {{2014}}, } @inproceedings{8554, author = {{Liebendörfer, Michael and Hochmuth, Reinhard and Kolter, Jana and Schukajlow, Stanislaw}}, booktitle = {{Proceedings of the 38th Conference of the International Group for the Psychology of Mathematics Education an the 36th Conference of the North American Chapter of the Psychology of Mathematics Education}}, editor = {{Nicol, C. and Oesterle, S. and Liljedahl, Peter and Allan, D.}}, pages = {{153}}, publisher = {{PME}}, title = {{{The Mathematical Beliefs and Interest Development of Pre-Service Primary Teachers}}}, volume = {{6}}, year = {{2014}}, } @article{8557, author = {{Liebendörfer, Michael}}, journal = {{Oberwolfach Reports}}, number = {{4}}, pages = {{3132--3135}}, title = {{{Self-determination and interest development of first-year mathematics students}}}, volume = {{11}}, year = {{2014}}, } @inbook{8561, author = {{Liebendörfer, Michael and Hochmuth, Reinhard and Schreiber, Stephan and Göller, Robin and Kolter, Jana and Biehler, Rolf and Kortemeyer, Jörg and Ostsieker, Laura}}, booktitle = {{Beiträge zum Mathematikunterricht 2014}}, editor = {{Roth, Jürgen and Ames, J.}}, pages = {{739--742}}, publisher = {{WTM-Verlag}}, title = {{{Vorstellung eines Fragebogens zur Erfassung von Lernstrategien in mathematikhaltigen Studiengängen}}}, year = {{2014}}, } @misc{8842, author = {{Jovanovikj, Ivan}}, title = {{{Detection and Resolution of Data-Flow Differences in Business Process Models}}}, year = {{2014}}, } @inproceedings{393, abstract = {{A fundamental problem for peer-to-peer systems is to maintain connectivity while nodes are leaving, i.e., the nodes requesting to leave the peer-to-peer system are excluded from the overlay network without affecting its connectivity. There are a number of studies for safe node exclusion if the overlay is in a well-defined state initially. Surprisingly, the problem is not formally studied yet for the case in which the overlay network is in an arbitrary initial state, i.e., when looking for a self-stabilizing solution for excluding leaving nodes. We study this problem in two variants: the Finite Departure Problem (FDP) ) and the Finite Sleep Problem (FSP). In the FDP the leaving nodes have to irrevocably decide when it is safe to leave the network, whereas in the FSP, this leaving decision does not have to be final: the nodes may resume computation if necessary. We show that there is no self-stabilizing distributed algorithm for the FDP, even in a synchronous message passing model. To allow a solution, we introduce an oracle called NIDEC and show that it is sufficient even for the asynchronous message passing model by proposing an algorithm that can solve the FDP using NIDEC. We also show that a solution to the FSP does not require an oracle.}}, author = {{Foreback, Dianne and Koutsopoulos, Andreas and Nesterenko, Mikhail and Scheideler, Christian and Strothmann, Thim Frederik}}, booktitle = {{Proceedings of the 16th International Symposium on Stabilization, Safety, and Security of Distributed Systems}}, pages = {{48----62}}, title = {{{On Stabilizing Departures in Overlay Networks}}}, doi = {{10.1007/978-3-319-11764-5_4}}, year = {{2014}}, }