4,491 research outputs found
PoN-S : a systematic approach for applying the Physics of Notation (PoN)
Visual Modeling Languages (VMLs) are important instruments of communication between modelers and stakeholders. Thus, it is important to provide guidelines for designing VMLs. The most widespread approach for analyzing and designing concrete syntaxes for VMLs is the so-called Physics of Notation (PoN). PoN has been successfully applied in the analysis of several VMLs. However, despite its popularity, the application of PoN principles for designing VMLs has been limited. This paper presents a systematic approach for applying PoN in the design of the concrete syntax of VMLs. We propose here a design process establishing activities to be performed, their connection to PoN principles, as well as criteria for grouping PoN principles that guide this process. Moreover, we present a case study in which a visual notation for representing Ontology Pattern Languages is designed
The Language of the Two Ordinances: Reply to a Tract by R. S. Gavin
https://digitalcommons.acu.edu/crs_books/1341/thumbnail.jp
Crystallization and preliminary diffraction studies of morphinone reductase, a flavoprotein involved in the degradation of morphine alkaloids
Warning: May Cause Warming
Browsing the aisles of her local grocery store, a shopper may come across a dusty unmarked bin with carrots in it. She may see a shelf of brightly colored cereal boxes touting their contents\u27 health benefits. Elsewhere in the store may be an iced container of sustainable shrimp from Thailand with a circled blue checkmark next to it. Perhaps there are local leeks, organic okra, or eggs from free- ranging chickens. The shopper may select the cereal on the basis of its health claims, the shrimp on the basis of its environmental friendliness, or maybe just the carrot because she is sick of all this labeled nonsense.
Whatever the shopper\u27s choices, the cacophony of product labels has probably affected her selections. Her selections, in turn, have probably affected sellers\u27 product development and marketing choices. Indeed, in response to growing interest in green goods, firms are developing and marketing a multitude of new products with environment-related attributes. Many of these products bear labels that are administered by private standards and certification systems, such as MSC-certified seafood, UTZ-certified tea, Fairtrade coffee, or Rainforest Alliance chocolate. Demand has prompted firms, nongovernmental organizations ( NGOs ), and private foundations to invest hundreds of millions of dollars to support the creation and implementation of such systems. But the increase in privately administered labels is not beneficial to all. In particular, these systems often disadvantage firms that lack the resources or technical expertise to achieve compliance with environmental standards, barring them from access to the labels. One strategy that some exporting countries have used to oppose publicly administered environmental-certification and environmental-labeling systems is through suit in the World Trade Organization ( WTO ). The more widespread support for private environmental labeling becomes, the more likely it is that exporting countries may attempt to sue them in the WTO as well. When the activities of a private environmental- labeling system are subject to WTO jurisdiction, however, is an open question, and the subject of this Note
On the Bragg Diffraction Spectra of a Meyer Set
Meyer sets have a relatively dense set of Bragg peaks and for this reason
they may be considered as basic mathematical examples of (aperiodic) crystals.
In this paper we investigate the pure point part of the diffraction of Meyer
sets in more detail. The results are of two kinds. First we show that given a
Meyer set and any intensity a less than the maximum intensity of its Bragg
peaks, the set of Bragg peaks whose intensity exceeds a is itself a Meyer set
(in the Fourier space). Second we show that if a Meyer set is modified by
addition and removal of points in such a way that its density is not altered
too much (the allowable amount being given explicitly as a proportion of the
original density) then the newly obtained set still has a relatively dense set
of Bragg peaks.Comment: 32 page
Icosahedral multi-component model sets
A quasiperiodic packing Q of interpenetrating copies of C, most of them only
partially occupied, can be defined in terms of the strip projection method for
any icosahedral cluster C. We show that in the case when the coordinates of the
vectors of C belong to the quadratic field Q[\sqrt{5}] the dimension of the
superspace can be reduced, namely, Q can be re-defined as a multi-component
model set by using a 6-dimensional superspace.Comment: 7 pages, LaTeX2e in IOP styl
An Introduction to Community Detection in Multi-layered Social Network
Social communities extraction and their dynamics are one of the most
important problems in today's social network analysis. During last few years,
many researchers have proposed their own methods for group discovery in social
networks. However, almost none of them have noticed that modern social networks
are much more complex than few years ago. Due to vast amount of different data
about various user activities available in IT systems, it is possible to
distinguish the new class of social networks called multi-layered social
network. For that reason, the new approach to community detection in the
multi-layered social network, which utilizes multi-layered edge clustering
coefficient is proposed in the paper.Comment: M.D. Lytras et al. (Eds.): WSKS 2011, CCIS 278, pp. 185-190, 201
How model sets can be determined by their two-point and three-point correlations
We show that real model sets with real internal spaces are determined, up to
translation and changes of density zero by their two- and three-point
correlations. We also show that there exist pairs of real (even one
dimensional) aperiodic model sets with internal spaces that are products of
real spaces and finite cyclic groups whose two- and three-point correlations
are identical but which are not related by either translation or inversion of
their windows. All these examples are pure point diffractive.
Placed in the context of ergodic uniformly discrete point processes, the
result is that real point processes of model sets based on real internal
windows are determined by their second and third moments.Comment: 19 page
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Mechanisms of cognitive-behavioral therapy for obsessive-compulsive disorder involve robust and extensive increases in brain network connectivity.
Cognitive-behavioral therapy (CBT) is effective for obsessive compulsive disorder (OCD); however, little is understood about its mechanisms related to brain network connectivity. We examined connectivity changes from resting-state functional magnetic resonance imaging data pre-to-post-CBT in 43 OCD participants, randomized to receive either 4 weeks of intensive CBT or 4 weeks waitlist followed by 4 weeks of CBT, and 24 healthy controls before and after 4 weeks of no treatment. Network-based-statistic analysis revealed large-magnitude increases in OCD connectivity in eight networks. Strongest increases involved connectivity between the cerebellum and caudate/putamen, and between the cerebellum and dorsolateral/ventrolateral prefrontal cortices. Connectivity increases were associated with increased resistance to compulsions. Mechanisms of CBT may involve enhanced cross-network integration, both within and outside of classical cortico-striatal-thalamo-cortical regions; those involving cerebellar to striatal and prefrontal regions may reflect acquisition of new non-compulsive goal-directed behaviors and thought patterns. Our findings have implications for identifying targets for enhancing treatment efficacy and monitoring treatment progress
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