ma photo
Dr. Afef Mdhaffar
ReDCAD laboratory   |  ENIS   |  University of Sfax
Research Unit on Development and Control of Distributed Applications


Current State

Full time researcher, Department of Computer Science, Distributed Systems Group, Philipps-University of Marburg, Germany (CEP4Cloud Project)

PhD student (Joint PhD), Philipps-University of Marburg, Germany

PhD student (Joint PhD), National School of Engineering of Sfax, Tunisia

DAAD Scholarship Holder (October 2011 - September 2013)

Education

M.Sc. degree (DEA) in Computer Science from the National School of Engineering of Sfax-Tunisia, in 2009. [ BibTeX | PDF ]

Engineer degree in Computer Science from the National School of Engineering of Sfax-Tunisia, in 2007.

Address

Philipps-University of Marburg
Fachbereich Mathematik und Informatik
Hans-Meerwein-Str. 3
D-35032 Marburg, Germany
Room C4341
Email : mdhaffar(at)informatik.uni-marburg.de
Phone : +49 6421 28 21 521

Research activities

Research Topics
My current research works are concentrated on the Quality of Service (QoS) management of SOA and Cloud Computing. Cloud Computing is a technology that provides on-demand access to massively scalable resources in the field of Service Computing. This new technology has emerged as a new paradigm for deploying, managing and offering services through a shared infrastructure. Maintaining QoS is important for this kind of service-based applications. It requires the ability to deal with permanently changing constraints at many levels (Infrastructure, Platform, Service). Repairing QoS degradation also requires the capacity of identifying its possible or actual sources and the capacity of reconfiguration decision and enforcement. Dealing with these issues is especially challenging for Cloud Computing-based application since the self-healing solution has to preserve the dynamic composition property and to be seamless for the service requesters, while being always usable under the different deployment constraints.

Master's thesis
A Dynamic QoS Reference Model Generation for Analysis of Web Services-based Applications

Organization Committee Member of:
- METHODICA-I'2009: The 4th workshop on Methods for the Adaptive Distributed Software.

Publications

International Journal Papers

[1] Afef Mdhaffar, Riadh Ben Halima, Mohamed Jmaiel, and Bernd Freisleben. D-CEP4CMA: A Dynamic Architecture for Cloud Performance Monitoring and Analysis via Complex Event Processing. Accepted for publication In The International Journal of Big Data Intelligence, 2014, (to appear). Inderscience Publishers, 2014.

International Conference Papers

[6] Afef Mdhaffar, Riadh Ben Halima, Mohamed Jmaiel, and Bernd Freisleben. CEP4Cloud: Complex Event Processing for Self-Healing Clouds. In 23rd IEEE International Conference on Enabling Technologies: Infrastructure for Collaborative Entreprises (WETICE 2014), pages 62 - 67. IEEE Computer Society Press, 2014. Best Paper Award.

[5] Afef Mdhaffar, Riadh Ben Halima, Mohamed Jmaiel, and Bernd Freisleben. CEP4CMA: Multi-layer Cloud Performance Monitoring and Analysis via Complex Event Processing. In Proceedings of the 2nd International Conference on NETworked sYStems (NETYS), (to appear). Springer, 2014.

[4] Afef Mdhaffar, Riadh Ben Halima, Mohamed Jmaiel, and Bernd Freisleben. A Dynamic Complex Event Processing Architecture for Cloud Monitoring and Analysis. In Proceedings of IEEE 5th International Conference on Cloud Computing Technology and Science (CloudCom), pages 270 - 275. IEEE Computer Society Press, 2013. [ BibTeX | DOI ]

[3] Meriam Mahjoub, Afef Mdhaffar, Riadh Ben Halima, and Mohamed Jmaiel. A comparative study of the current Cloud Computing technologies and offers. In Proceedings of the IEEE First Symposium on Network Cloud Computing and Applications, pages 131 - 134. IEEE Computer Society, 2011. [ BibTeX | DOI ]

[2] Afef Mdhaffar, Riadh Ben Halima, Ernst Juhnke, Mohamed Jmaiel, and Bernd Freisleben. AOP4CSM: An Aspect-Oriented Programming Approach for Cloud Service Monitoring. In Proceedings of the 11th IEEE International Conference on Computer and Information Technology, pages 363 - 370. IEEE Computer Society, 2011. [ BibTeX | DOI ]

[1] Afef Mdhaffar, Soumaya Marzouk, Riadh Ben Halima, and Mohamed Jmaiel. A Runtime Performance Analysis for Web Service-Based Applications. In F. Daniel and F.M. Facca (Eds.), editors, Current Trends in Web Engineering, volume 6385 of Lecture Notes in Computer Science. 1st Workshop on Engineering SOA and the Web (ESW‘2010) Held in conjunction With the 10th International Conference on Web Engineering (ICWE’2010), 2010 Proceedings, pages 313-324. Springer-Verlag Berlin Heidelberg, Vienna, Austria, July 2010. [ BibTeX | DOI ]

Invited Talks (International Events)

[2] Afef Mdhaffar. A Self-Healing Approach for Cloud Computing Environments. In The Third DAAD Workshop on Service-oriented Distributed Software Architectures. 2011.

[1] Afef Mdhaffar. A Self-Repairing Architecture for Cloud Computing Environments. In The Second DAAD Workshop on Service-Oriented Distributed Software Architectures. 2010.

Invited Talks (National Events)

[2] Afef Mdhaffar. A Cross-Layer Self-Repairing Architecture for Cloud Computing Environments. In 10th workshop on Methods for the Adaptive Distributed Software (METHODICA-I'2013). 2013.

[1] Afef Mdhaffar. A Self-Healing Approach for Cloud Computing Environments. In 6th workshop on Methods for the Adaptive Distributed Software (METHODICA-I'2011). 2011.

Posters

[2] Afef Mdhaffar, Riadh Ben Halima, Mohamed Jmaiel, and Bernd Freisleben. Toward A Dynamic Architecture for Cloud Monitoring and Analysis based on Complex Event Processing. In 10th workshop on Methods for the Adaptive Distributed Software (METHODICA-I'2013). ACM Tunisian Chapter, 2013. [PDF]

[1] Afef Mdhaffar, Riadh Ben Halima, Mohamed Jmaiel, and Bernd Freisleben. Design and Experimentation of a Self-Healing Architecture for Cloud Computing. In International the workshop on Current Trends on Distributed Systems'2011, held in conjunction with the International Spring School on Distributed Systems (METIS-CTDS'2011). 2011. [PDF]

Teaching activities

  • 2009 - 2010: Faculty of Economics and Management of Sfax, Tunisia
         -Web services and Internet Applications (XML, DTD, XSD - Web Service, WSDL, SOAP, UDDI)
        -Object oriented programming
  • 2008 - 2009: National School of Engineering of Sfax, Tunisia
        -Languages and techniques of Internet
        -Artificial Intelligence and Expert Systems