In a large dynamic network, data can be copied anywhere to make it fault tolerant and easy accessed but there must be an efficient protocol to manage the replicas and make sure the data is consistent and high in availability with a low communication cost. In this paper, we introduced a new protocol, named Diagonal Replication in Mesh (DRM) for data replica control protocol for a large dynamic n...

Microarray experiments are multi-step processes. At each step-the growth of cultures, extraction of mRNA, reverse transcription, labelling, hybridization, scanning, and image analysis-variation and error cannot be completely avoided. Estimating the amount of such noise and variation is essential, not only to test for differential expression but also to suggest at which level replication is most...

Replication is a useful technique for distributed database systems and can be implemented in a grid computation environment to provide a high availability, fault tolerant, and enhance the performance of the system. This paper discusses a new protocol named Diagonal Data Replication in 2D Mesh structure (DR2M) protocol where the performance addressed are data availability which is compared with ...

Data warehouses are large repositories that integrate data from several sources for analysis and decision support. Data warehouse quality is crucial, because a bad data warehouse design may lead to the rejection of the decision support system or may result in non-productive decisions. In the last years, we have been working on the definition and validation of software metrics in order to assure...

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Scientific applications require sophisticated data management capabilities. We present the design and implementation of a Data Replication Service (DRS), one of a planned set of higher-level data management services for Grids. The capabilities of the DRS are based on the publication capability of the Lightweight Data Replicator (LDR) system developed for the LIGO Scientific Collaboration. We de...

We present a new distributed data replication algorithm tailored especially for large-scale read/write data objects such as files. The algorithm guarantees atomic data consistency, while incurring low latency costs. The key idea of the algorithm is to maintain copies of the data objects separately from information about the locations of up-todate copies. Because it performs most of its work usi...

Transactional memory (TM) [8] is consistently making its way into mainstream programming, being already deployed by some of the major CPU manufacturers [11] and in several reference compilers [5]. To cope with requirements such as scalability and dependability, recent proposals explore the combination of TM with data replication, bringing TM to distributed environments — conceiving distributed ...

objective: the brucella melitensis virb operon, encoding a type iv secretion system (t4ss), is required for intracellular replication and persistent infection in the mouse model. the product of the second gene of the virb operon, virb2, is predicted to be localized at the bacterial surface, where they could potentially interact with host cells. studies to date have focused on characterization o...