Cloud Computing: Towards Making Computing a Utility -- Semantic Engine and Cloud Agency for Vendor Agnostic Retrieval, Discovery, and Brokering of Cloud Services -- A Concurrency Mitigation Proposal for Sharing Environments: An Affinity Approach Based on Applications Classes -- On Cloud Spot Market: An Overview of the Research -- Analysis and Optimization on FlexDPDP: A Practical Solution for Dynamic Provable Data Possession -- Leveraging Ad-hoc Networking and Mobile Cloud Computing to Exploit Short-Lived Relationships Among Users on the Move -- Energy Consumption Analysis of HPC Applications Using NoSQL Database Feature of Energy Analyzer -- A Low-Overhead Secure Communication Framework for an Inter-cloud Environment -- Analysing Virtual Machine Security in Cloud Systems -- Cloud Computing: Security Issues Overview and Solving Techniques Investigation.