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A key question when analyzing high throughput data is whether the information provided by the measured biological entities (gene, metabolite expression for example) is related to the experimental conditions, or, rather, to some interfering signals, such as experimental bias or artefacts. Visualization tools are therefore useful to better understand the(More)
—Virtualization techniques are the key in both public and private cloud computing environments. In such environments, multiple virtual instances are running on the same physical machine. The logical isolation between systems makes security assurance weaker than physically isolated systems. Thus, Virtual Machine Introspection techniques become essential to(More)
—Virtualization techniques are widely used in cloud computing environments today. Such environments are installed with a large number of similar virtual instances sharing the same physical infrastructure. In this paper, we focus on the memory usage optimization across virtual machines by automatically de-duplicating the memory on per-page basis. Our(More)
Virtualization has demonstrated its importance in both public and private cloud computing solutions. In such environments, multiple virtual instances run on the same physical machine concurrently. Thus, the isolation in the system is not guaranteed by the physical infrastructure anymore. Reliance on logical isolation makes a system vulnerable to attacks.(More)
—In this information age, Social Networking Services contribute a significant amount of contents in creating a knowledge based society. Nowadays, there are more than 500 million tweets sent per day in Twitter. Such drastic growth of contents brings new opportunities for human beings to discover their surroundings more effectively in a timely manner.(More)
Benefits have been claimed by adopting virtualization techniques in many fields. It could significantly reduce the cost of managing systems, including critical systems used in cyber power grid. However, in such environments, multiple virtual instances run on the same physical machine concurrently, and reliance on logical isolation makes a system vulnerable(More)
—Numerous file systems have been implemented to meet the needs in today's big data era, however many of them require specific configurations or frameworks for data processing. This paper presents CouchFS, a POSIX-compliant distributed file system for large data sets. We build CouchFS on top of CouchDB, which grants us flexibility to handle semistructured(More)
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