Results 291 to 300 of about 67,200 (355)
ABSTRACT The alkali halides, like other polar crystals, melt at high temperatures, but the melting points (Tm) of the lithium halides are conspicuously lower (by about 300 ± 70 K) than expected from reasonable comparisons with the other alkali halides.
Lona Zeneyedpour, Peter C. Burgers
wiley +1 more source
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Energy, 2019
Refuse derived fuel (RDF) is produced in large amounts but its heterogeneous nature and low calorific value reduce the potential for energetic valorization of this material.
Catarina Nobre +2 more
exaly +2 more sources
Refuse derived fuel (RDF) is produced in large amounts but its heterogeneous nature and low calorific value reduce the potential for energetic valorization of this material.
Catarina Nobre +2 more
exaly +2 more sources
Benchmarking RDF Metadata Representations: Reification, Singleton Property and RDF*
International Computer Science Conference, 2021RDF reification is a data modelling solution for writing RDF statements about RDF statements. A set of approaches exist in the literature to express statement-level metadata, or “reified” statements, in RDF.
F. Orlandi, D. Graux, D. O’Sullivan
semanticscholar +1 more source
Proceedings of the 23rd International Conference on World Wide Web, 2014
With the advent of Semantic Web and Resource Description Framework (RDF), the web is likely to witness an unprecedented wealth of knowledge, resulting from seamless integration of various data sources. Data integration is one of the key features of RDF, however, absence of secure means for managing sensitive RDF data may prevent sharing of critical ...
Jyothsna Rachapalli +3 more
openaire +1 more source
With the advent of Semantic Web and Resource Description Framework (RDF), the web is likely to witness an unprecedented wealth of knowledge, resulting from seamless integration of various data sources. Data integration is one of the key features of RDF, however, absence of secure means for managing sensitive RDF data may prevent sharing of critical ...
Jyothsna Rachapalli +3 more
openaire +1 more source
RDF/RDFS-based Relational Database Integration
22nd International Conference on Data Engineering (ICDE'06), 2006We study the problem of answering queries through a RDF/RDFS ontology, given a set of view-based mappings between one or more relational schemas and this target ontology. Particularly, we consider a set of RDFS semantic constraints such as rdfs:subClassof, rdfs:subPropertyof, rdfs:domain, and rdfs:range, which are present in RDF model but neither XML ...
Huajun Chen +3 more
openaire +1 more source
RDF-Stores und RDF-Query-Engines
Datenbank-Spektrum, 2011RDF ist das Datenmodell der Semantic-Web- und Linked-Data-Initiativen, das zunehmend Verbreitung findet. Es zeichnet sich durch feinkornige Strukturierungsmoglichkeiten in Form binarer Relationen und durch flexible Typisierung ohne die Notwendigkeit eines praskriptiven Schemas aus.
Thomas Neumann 0001, Gerhard Weikum
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Proceedings of the 35th international ACM SIGIR conference on Research and development in information retrieval, 2012
We demonstrate RDF Xpress, a search engine that enables users to effectively retrieve information from large RDF knowledge bases or Linked Data Sources. RDF Xpress provides a search interface where users can combine triple patterns with keywords to form queries.
Elbassuoni, S., Ramanath, M., Weikum, G.
openaire +2 more sources
We demonstrate RDF Xpress, a search engine that enables users to effectively retrieve information from large RDF knowledge bases or Linked Data Sources. RDF Xpress provides a search interface where users can combine triple patterns with keywords to form queries.
Elbassuoni, S., Ramanath, M., Weikum, G.
openaire +2 more sources
2011
RDF (Resource Description Framework) is a World Wide Web Consortium recommendation for specifying meta-data models on the web. RDF databases consist of triples in the form of subject-predicateobject, which are often conceptualized as defining a directed labeled graph. In this paper, we extend the basic model of RDF by introducing two types of integrity
Akhtar, Waseem +2 more
openaire +2 more sources
RDF (Resource Description Framework) is a World Wide Web Consortium recommendation for specifying meta-data models on the web. RDF databases consist of triples in the form of subject-predicateobject, which are often conceptualized as defining a directed labeled graph. In this paper, we extend the basic model of RDF by introducing two types of integrity
Akhtar, Waseem +2 more
openaire +2 more sources

