137 research outputs found
Interaction between graphene and SiO2 surface
With first-principles DFT calculations, the interaction between graphene and
SiO2 surface has been analyzed by constructing the different configurations
based on {\alpha}-quartz and cristobalite structures. The single layer graphene
can stay stably on SiO2 surface is explained based on the general consideration
of configuration structures of SiO2 surface. It is also found that the oxygen
defect in SiO2 surface can shift the Fermi level of graphene down which opens
out the mechanism of hole-doping effect of graphene absorbed on SiO2 surface
observed in experiments.Comment: 17 pages, 7 figure
THE EVOLUTION OF THE FITOSANITARY STATUS OF THE STORED APPLES IN NATURAL CONDITIONS
The researches took place in natural conditions of storage from October to March, and were aimed at two apple cultivars: Jonathan and Golden delicious. We had determinate the field and storage mycological flora which produces rotten stuff. The cultivar Golden
delicious behaved as resistant in the storage period; the frequency (F%), the intensity (I%) and the degree of attack (D.A%) was low, for example the degree of attack in March touched 5,52%. The cultivar Jonathan breaked down after three month of storage, the frequency of attack being above 30%
A Temporal Web Ontology Language
The Web Ontology Language (OWL) is the most expressive standard language for modeling ontologies on the Semantic Web. In this paper, we present a temporal extension of the very expressive fragment SHIN(D) of the OWL-DL language resulting in the tOWL language. Through a layered approach we introduce 3 extensions: i) Concrete Domains, that allows the representation of restrictions using concrete domain binary predicates, ii) Temporal Representation, that introduces timepoints, relations between timepoints, intervals, and Allenās 13 interval relations into the language, and iii) TimeSlices/Fluents, that implements a perdurantist view on individuals and allows for the representation of complex temporal aspects, such as process state transitions. We illustrate the expressiveness of the newly introduced language by providing a TBox representation of Leveraged Buy Out (LBO) processes in financial applications and an ABox representation of one specific LBO
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