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A framework for the qualitative representation of positional information in a two-dimensional space is presented. Qualitative representations use discrete quantity spaces, where a particular distinction is introduced only if it is relevant to the context being modeled. This allows us to build a flexible framework that accommodates various levels of(More)
In recent years, production and use of bio-pesticides have increasing and replacing some synthetic chemical pesticides applied to food commodities. In this review, biological control is focused as an alternative, to some synthetic chemical treatments that cause environmental, human health, and food quality risks. In addition, several phytopathogenic(More)
We present mechanisms used to maintain the consistency of a knowledge base of spatial information based on a qualitative representation of 2-D positions. These include the propagation heuristics used when inserting new relations as well as the reason maintenance mechanisms necessary to undo the eeects of propagation when deleting a relation. Both take(More)
Families are increasingly using Social Networking Sites (SNS) to keep in touch. Building upon our prior work and using the results from 6 participatory design sessions, we present the design of two ubiquitous exergames: GuessMyCaption and TakeAPhoto. These games use family memoirs available in SNS and natural interfaces to encourage older adults to(More)
In order to effectively respond to and minimize the psychological impact following disasters, such as radio-nuclear ones, it is essential to understand the mechanisms involved in such conditions and how to prevent and treat the psychological impacts, including those related to acute traumatic stress and its consequences across life span. Radio-nuclear(More)
In this paper, we compare various options for reifying RDF triples. We are motivated by the goal of representing Wikidata as RDF, which would allow legacy Semantic Web languages, techniques and tools – for example, SPARQL engines – to be used for Wikidata. However, Wikidata annotates statements with qualifiers and references, which require some notion of(More)
PURPOSE To develop an electrical properties tomography (EPT) technique that can provide in vivo electrical conductivity and permittivity images of biological tissue without performing complex-valued radiofrequency field measurements. THEORY AND METHODS Electrical conductivity and permittivity images are modeled as a monotonic function of tissues' water(More)