The SPARQL query language for RDF provides Semantic Web developers with a powerful tool to extract information from large datasets. This report describes a transformation from SPARQL into the relational algebra, an abstract intermediate language for the expression and analysis of queries. This makes existing work on query planning and optimization available to SPARQL implementors. A further tra...

The New York Climate Change Science Clearinghouse (NYCCSC) project arose in response to the need for a central portal for policy makers to access vetted data and information relevant to climate change adaptation and mitigation in New York State. This project involves multiple components including a publicly available website encompassing a software application that utilizes semantic web technol...

Current efforts in the semantic web area have not yet led to applications that deliver additional real-life value for web users. The main reason is a vicious circle of low populated concepts, low value for web users as well as missing incentives for annotating data. As a solution a pragmatic approach based on goal-oriented special purpose ontologies derived from the deep web in combination with...

In this report, we mainly present an overview of ObjectCoref, which follows a self-training framework to resolve object coreference on the Semantic Web. Besides, we show preliminary results of Falcon-AO (2010) for this year’s OAEI campaign, including the benchmark and conference tracks. 1 Presentation of the system 1.1 State, purpose, general statement The Semantic Web is an ongoing effort by t...

Publishing research on the Web accompanied by machine-readable data is one of the aims of Linked Research. Merely embedding metadata as RDFa in HTML research articles, however, does not solve the problems of accessing and querying that data. Hence, I created a simple ETL pipeline to extract and enrich Linked Data from my personal website, publishing the result in a queryable way through Triple ...

Marko A. Rodriguez is director’s fellow at the Center for Nonlinear Studies, T-7, Los Alamos National Laboratory, Los Alamos, New Mexico 87545; Markolanl.gov T he web community has introduced a set of standards and technologies for representing, querying and manipulating a globally distributed data structure known as the Web of Data. The proponents of the Web of Data envision much of the wo...

We recently addressed a survey to Semantic Web researchers, in which Twitter was ranked in the top three services used in order to spread information and reach peer researchers, students, as well as a broader audience. In order to figure out how Twitter is really used by this community, we conducted an analysis of the Twitter feed of the recent 8th International Semantic Web Conference (#iswc20...

The chimpanzee (Pan troglodytes) is one of four genera in the family Hominidae, which also includes humans, gorillas and orangutans. Approximately 340 chimpanzees live in captivity in Japan and of these, only two chimpanzees are estimated to be older than 50 years old while the chimpanzees in the wild live for approximately 50 years. The Convention on International Trade in Endangered Species o...

In 2008, IRD started to work on setting up a knowledge base (named Ecoscope) about Ecosystem Approach to Fisheries domain (EAF) in the context of a marine ecology laboratory studying Exploited Marine Ecosystems in different regions of the world. This application was meant to fit the needs of researchers by improving knowledge and related information resources management [14,12]. Among other goa...

In addition to traditional spam detection applications, new methods of filtering messages – including whitelist and social network based filters – are being investigated to further improve on mail sorting and classification. In this paper, we present an email scoring mechanism based on a social network augmented with reputation ratings. We present an algorithm for inferring reputation ratings b...