1,721,051 research outputs found
Ontology-based data access with MASTRO
No full textIn several areas, such as Enterprise Application Integration, Data Integration,
and the Semantic Web, clients need to access the services exported by the system,
and hence require a representation of the intensional level of the application domain in
terms of which they can specify the access to the exported services. One of the most
interesting usages of such a shared conceptualization is ontology-based data access,
where a conceptual layer is exported to the client, abstracting away from how actual
data is maintained. Therefore, an ontology-based data access system has to adress the
“impedance mismatch” issue, existing between data actually present at the sources, and
objects represented at the intensional level.
In this demo, we present MASTRO, an ontology-based data access system that extends the QuOnto system [1] with new capabilities and uses the QuOnto engine at its
core. Specifically, MASTRO provides tractable reasoning over an ontology, laying over
an autonomous relational DBMS managing the data layer. In what follows, we introduce
the main services provided by MASTRO, namely (i) ontology specification, (ii) query
answering, (iii) ontology satisfiability, and (iv) meta-query answering. The present work
is one of the outcomes of the European project TONES
Technological features and molecular microbial characterisation of a granular activated carbon packed-bed biofilm reactor capable of an effective anaerobic digestion of olive mill wastewaters.
No full textAnaerobic digestion of olive mill wastewaters is generally performed in anaerobic contact bioreactors where the removal of toxic phenols is often unsatisfactory. In the present work we show that a granular activated carbon packed-bed biofilm reactor can be successfully used to achieve effective and reproducible wastewater decontamination even at high organic loads. A comparison of 16S rRNA gene sequences of the inoculum and of biomass samples from different districts of the reactor revealed enrichment of specific microbial populations, probably minor members of the inoculum and/or of the olive mill wastewaters. They mainly consisted of the members of Proteobacteria, Flexibacter-Cytophaga-Bacteroides, and sulphate-reducing bacteria. The dominant sequence among Archaea (70% of clones) was closely related to Methanobacterium formicicum
The mastro ecosystem: Ontology-based data management from theory to practice
No full textOntology Based Data Management (OBDM) is the paradigm that enables accessing existing data by means of a comprehensible and semantically rich representation of the application domain expressed by an ontology. In this demonstration we present the Mastro Ecosystem, a suite of tools providing solutions for OBDM covering a vast array of features ranging from ontology design, data access and querying, data quality analysis, open data creation and publishing, and many more
Molecular microbial diversity and technological features of a packed-bed biofilm digestor capable of olive mill wastewater anaerobic digestion and valorisation.
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Molecular microbial diversity and technological features of a packed-bed biofilm digestor capable of olive mill wastewater anaerobic digestion and valorisation
No full textA granular activated carbon (GAC) packed-bed reactor for a more efficient anaerobic treatment and valorization (via methane production) of olive mill wastewaters
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