SCALABLE COMPUTING: PRACTICE AND EXPERIENCE - Volume 15, Issue 2 (2014) Scientific International Journal for Parallel and Distributed Computing ISSN 1895-1767 www.scpe.org SCPE is an electronic journal. It provides immediate open access to its content following the principle that making research freely available to the public supports a greater global exchange of knowledge. Full texts available at http://www.scpe.org/index.php/scpe/issue/view/118 TABLE OF CONTENTS Special Issue - Introduction to the Special Issue - Teodor Florin Fortis - Bargain strategies for agent automated negotiation in an e-business environment - Serban Radu, Adina Magda Florea - Software modernization and cloudification using the ARTIST migration methodology and framework - Andreas Menychtas, Kleopatra Konstanteli, Juncal Alonso, Leire Orue-Echevarria, Jesus Gorronogoitia, George Kousiouris, Christina Santzaridou, Hugo Bruneliere, Bram Pellens, Peter Stuer, Oliver Strauss, Tatiana Senkova, Theodora Varvarigou - Adaptive time-based coordinated checkpointing for cloud computing workfl ows - Bakhta Meroufel, Ghalem Belalem Articles - Regulated Condition-Event Matrices for Cloud Environments - Richard M. Wallace, Patrick Martin, Jose Luis Vazquez-Poletti - Generalized Matrix Multiplication and its Object Oriented Model - Maria Ganzha, Marcin Paprzycki, Stanislav G. Sedukhin