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Analysis of trajectory data is the key to a growing number of applications aiming at global understanding and management of complex phenomena that involve moving objects (e.g. worldwide courier distribution, city traffic management, bird migration monitori ...
We propose a semi-automated method for redeploying bioinformatic databases indexed in a Web portal as a decentralized, semantically integrated and service-oriented Data Grid. We generate peer-to-peer schema mappings leveraging on cross-referenced instances ...
Intuitively, aggressive work sharing among concurrent queries in a database system should always improve performance by eliminating redundant computation or data accesses. We show that, contrary to common intuition, this is not always the case in practice, ...
UrbanSim is an increasingly popular integrated transportation land-use model. A particularly attractive feature of UrbanSim is its disaggregate frame of analysis. This characteristic means it requires much land-use and socio-economic data at a fine scale. ...
Multiplexers are one of the most important elements in readout front-end ASICs for multi-element detectors in medical imaging. The purpose of these ASICs is to detect signals appearing randomly in many channels and to collect the detected data in an ordere ...
UrbanSim is an increasingly popular integrated transportation land-use model. A particularly attractive feature of UrbanSim is its disaggregate frame of analysis. This characteristic means it requires much land-use and socio-economic data at a fine scale. ...
Modern scientific applications consume massive volumes of data produced by computer simulations. Such applications require new data management capabilities in order to scale to terabyte-scale data volumes [32, 10]. The most common way to discretize the app ...
The work presented in this thesis deals with several problems met in information retrieval (IR), task which one can summarise as identifying, in a collection of "documents", a subset of documents carrying a sought information, i.e.. relevant for a request ...
This thesis proposes to address the well-know database integration problem with a new method that combines functionality from database conceptual modeling techniques with functionality from logic-based reasoners. We elaborate on a hybrid - modeling+validat ...
Survival time is a main topic in medical statistics, and many reasons makes it difficult to get complete data in studies of survival time. A study is often finished before the death of all patients, and we may keep only the information that some patients w ...