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Due to the complexity of XML query languages, the need for visual query interfaces that can reduce the burden of query formulation is fundamental to the spreading of XML to wider community. We present a RDBMS-based XML query evaluation system, called XBLEND, that takes a novel and non-traditional approach to improving query performance by blending visual query formulation and query processing. It...
A mashup is a Web application that integrates data, computation and GUI provided by several systems into a unique tool. The concept originated from the understanding that the number of applications available on the Web and the need for combining them to meet user requirements, are growing very rapidly. This demo presents MatchUp, a system that supports rapid, on-demand, intuitive development of mashups,...
QuickStart is a tool to automate the physical design of data warehouses for HP's Neoview system. It has been researched and prototyped at HP Labs with close interaction from Neoview design experts. It embodies heuristics and best practices of the experts to search for candidate physical features and uses cost calculations to recommend the features that result in good designs. It has some unique characteristics...
The PLUS system is designed to efficiently track moving object locations on a road network and execute continuous spatial queries in support of location-based services. PLUS implements a novel lazy position update mechanism that significantly reduces the communication overhead and server indexing load related to frequent location updates in moving object and moving query scenarios. The contribution...
This demo presents a graphical user interface and ranking system, coined KSpot, for effectively monitoring the K highest-ranked answers to a query Q in a wireless sensor network. KSpot deploys state-of-the-art distributed top-k query processing algorithms in order to realize both snapshot queries and historic queries minimizing the consumption of system resources and prolonging the lifetime of the...
In this demo we introduce GuruMine, a pattern mining system for the discovery of leaders, i.e., influential users in social networks, and their tribes, i.e., a set of users usually influenced by the same leader over several actions. GuruMine is built upon a novel pattern mining framework for leaders discovery, that we introduced. In particular, we consider social networks where users perform actions...
Commercial database customers across the board list SQL performance tuning as one of the most time-consuming tasks for database administrators (DBAs). The 10g Oracle Database provides a feature called the SQL tuning advisor to simplify the task. The 11g release adds a new database feature, called automatic SQL tuning, that closes the feedback loop for the first time, fully automating the SQL tuning...
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