This research is motivated by the needs for data manipulation over flash-memory storage systems, where flash memory has become a popular data storage medium for mobile devices. Different from the past work, we are interested in recovery designs with ...

We propose a data management approach for configuring, storing, processing and flowing data in a heterogeneous system formed by wired plus wireless sensor networks. A stream processing abstraction allows small wireless sensor nodes to store and process ...

In NAND flash storages, the invalidated pages could occupy the storage space until being erased. In order to preserve sustained write performance and storage capacity, the storage controller must eliminate these pages through garbage collection ...

In a Rational Drug Design (RDD) one important step is the receptor-ligand interaction evaluation through molecular docking simulations. How it is a way impossible to test all available compounds for a target receptor, there is a need to select the most ...

With the widespread of the Model-Driven Development (MDD) and surfing on the success of the Unified Modeling Language (UML), software development is shifting from being code-centric to model-centric. Models become the key artefacts in the software ...

This paper describes an algorithm for computing the maximal set of XML functional dependencies (XFD) that is guaranteed to hold across a set of local systems, each with its own defined set of XFD. Our method is based on an axiom system that we have ...

Web content is consumed on devices with a significant variation in display resolution. Visualizing data is typically performed by extracting data from a database for transmission to the client and then visualizing it with a client-side Javascript ...

An XML document is usually stored with its schema so that the structural consistency of the document is ensured. In general, schemas are continuously updated according to changes in real world. Thus, we have to precisely know how a schema is updated to ...

One of the deficiencies of SQL is that it allows little practical support for factoring, parametrization and modularization of complex SQL statements. Using dynamic SQL or macroprocessors for this purpose is error prone and inconvenient. This paper ...

In this paper, the notions of semantic relevancy of statements, semantic data dependences and conditional dependences are extended to the case of programs embedding SQL statements in both concrete and abstract domains. This allows us to refine ...

Stream query processing has a particularly broad range of applications from sensor data processing and internet traffic analysis to runtime monitoring of stock market and server logs, and scientific simulations. This work focuses on multi-way join ...

An effective Distributed Denial of Service (DDoS) defense mechanism must guarantee legitimate users access to an Internet service masking the effects of possible attacks. That is, it must be able to detect threats and discard malicious packets in a ...

A recent trend in data stream processing shows the use of advanced continuous queries (CQs) that reference non-streaming resources such as relational data in databases and machine learning models. Since non-streaming resources could be shared among ...

The detection of product duplicates is one of the many challenges that Web shop product aggregators are facing. This paper presents two new methods to solve the problem of product duplicate detection. Both methods extend a state-of-the-art approach that ...

This paper presents an activity tracking and recall mechanism so called TR for mobile handheld devices such as smartphones. A goal of the TR is to provide both a practical and extensible information tracking, storing, and retrieval way for user-centric ...

XML is used to store and exchange data not only in the web and has advantages like self-describing content. Sensor nodes have limited hardware resources such that processing verbose data formats like XML is hard or even impossible if no intelligent ...

Althought optimistic concurrency control protocols have increasingly been used in distributed database management systems, they imply a trade-off between the number of transactions that can be executed concurrently, hence, the peak throughput, and ...

In this paper we study the performance impact induced by different application-level monitoring tools, targeted for the detection of performance anomalies in Web-based applications. Adaptive and selective algorithms, able to self-adapt the monitoring ...

We present MoSQL, a MySQL storage engine using a transactional distributed key-value store system for atomicity, isolation and durability and a B+Tree for indexing purposes. Despite its popularity, MySQL is still without a general-purpose storage engine ...

With the explosion of the size of data warehousing applications, the horizontal data partitioning is well adapted to reduce the cost of complex OLAP queries and the warehouse manageability. It is considered as a non redundant optimization technique. ...