@article{gavaskar_kallitsis_devetsikiotis_michailidis_montoya_2010, title={Performance Modeling of Virtual Collaborative Environments}, ISSN={["2166-0069"]}, DOI={10.1109/glocomw.2010.5700165}, abstractNote={In this paper, we present a framework for performance modeling of virtual collaborative environments (VCE). Our model could be used as benchmarking tool for assessing the quality of experience of participants in a virtual environment. Our framework is designed to assess Second Life type of environments but could easily be extended to any kind of virtual worlds. We examine the case of users communicating via chatting and voice. We capture the performance for both cases and using response surface methodology techniques we derive a utility function that yields the performance of the examined environment given the available computing and communication resources. We propose a pricing scheme and based on this we formulate optimization problems for optimal resource allocation for VCEs.}, journal={2010 IEEE GLOBECOM WORKSHOPS}, author={Gavaskar, Nilesh and Kallitsis, Michael G. and Devetsikiotis, Michael and Michailidis, George and Montoya, Mitzi}, year={2010}, pages={1383–1387} }
 @article{kallitsis_michailidis_devetsikiotis_2009, title={Measurement-based optimal resource allocation for network services with pricing differentiation}, volume={66}, ISSN={["1872-745X"]}, DOI={10.1016/j.peva.2009.03.003}, abstractNote={In this paper, we introduce a model for allocating available resources in service-oriented network, with particular focus on delay sensitive services. The model is based on a pricing scheme for the offered services and also takes into consideration the quality of service requirements of each service class through a probabilistic delay-bound constraint. The proposed policy is dynamic in nature and relies on online measurements of the incoming traffic for adjusting the class allocations. We illustrate its performance and its robustness to various tuning parameters through an extensive simulation study that considers various simulation scenarios including experiments based on real network traces.}, number={9-10}, journal={PERFORMANCE EVALUATION}, author={Kallitsis, M. G. and Michailidis, G. and Devetsikiotis, M.}, year={2009}, month={Sep}, pages={505–523} }
 @inproceedings{kallitsis_michailidis_devetsikiotis_2007, title={Pricing and measurement-based optimal resource allocation in next generation network services}, booktitle={2007 IEEE Globecom Workshops, Proceedings}, author={Kallitsis, M. G. and Michailidis, G. and Devetsikiotis, M.}, year={2007}, pages={189–194} }
 @inproceedings{kallitsis_michailidis_devetsikiotis_2007, title={Pricing and optimal resource allocation in next generation network services}, booktitle={2007 IEEE Sarnoff Symposium}, author={Kallitsis, M. G. and Michailidis, G. and Devetsikiotis, M.}, year={2007}, pages={457–461} }