1,721,093 research outputs found
A new condition ensuring gradient continuity for minimizers of non-autonomous functionals with mild phase transition
No full textWe show that local minimizers of the non-autonomous functional P-log(u,Omega) = integral(Omega)|Du|(p)(1+a(x)loge+|Du|)dx, p > 1, have continuous gradient provided that the function a()is (almost everywhere) non-negative and weakly differentiable, and moreover its gradient locally belongs to the Lorentz-ZygmundspaceL(n,1)logL. This gives a precise insight of the fact that for this type of two-phase functionals the lack of uniform ellipticity can be overcome by additional regularity of the switching coefficient a(); the novelty is that the condition is not pointwise, but has integral character, and actually improves the known results ensuring regularity for minimizers of such functionals
Gradient continuity for p(x)-Laplacian systems under minimal conditions on the exponent
Full text linkWe consider solutions of p(x)-Laplacian systems with coefficients and we show that their gradient is continuous provided that the variable exponent has distributional gradient belonging to the Lorentz-Zygmund space Ln,1logL and that the gradient of the coefficient belongs to the Lorentz space Ln,1. The result is new since the use of the sharp Sobolev embedding in rearrangement invariant spaces does not ensure the unique (up to now) known assumption for such result, namely the log-Dini continuity of p(⋅) and the plain Dini continuity of the coefficient. Our approach relies on perturbation arguments and allows to slightly improve results in dimension two even for the case where p(⋅) is constant
Enhancing statement evaluation in argumentation via multi-labelling systems
No full textIn computational models of argumentation, the justification of statements has drawn less attention than the construction and justification of arguments. As a consequence, significant losses of sensitivity and expressiveness in the treatment of statement statuses can be incurred by otherwise appealing formalisms. In order to reappraise statement statuses and, more generally, to support a uniform modelling of different phases of the argumentation process we introduce multi-labelling systems, a generic formalism devoted to represent reasoning processes consisting of a sequence of labelling stages. In this context, two families of multi-labelling systems, called argument-focused and statement-focused approach, are identified and compared. Then they are shown to be able to encompass several prominent literature proposals as special cases, thereby enabling a systematic comparison evidencing their merits and limits. Further, we show that the proposed model supports tunability of statement justification by specifying a few alternative statement justification labellings, and we illustrate how they can be seamlessly integrated into different formalisms
Some considerations on mixing semantics in abstract argumentation
No full textThis paper discusses the issue of mixing different argumentation semantics in a single Dung's argumentation framework. The general notion of combination schema is defined to model a specific way of mixing argumentation semantics, and several properties that may be desirable for a combination schema are introduced at an abstract level. A specific combination schema is then evaluated in the light of such properties, showing that there are several interesting challenges both from a conceptual and a technical perspective still to be tackled
On the acceptability of arguments and its fundamental role in nonmonotonic reasoning, logic programming and n-person games:25 years later
Full text link@article{dung:aij95, author ="P. Dung", title=" and its fundamental role in non-monotonic reasoning, logic programming and
A Meta-Design Approach to Collaborative Robotics to Achieve Sustainability Goals
No full textThis paper analyzes how collaborative robots can contribute to achieving some of the United Nations’ Sustainability Development Goals and reflects on the advantages that a meta-design approach could bring to robot deployment in real settings. The paper highlights how true sustainability not only depends on technological innovation but also on considerations that pertain to the social sphere of the intervention, like the specific domain, the workplace, and the user community, which require infrastructures for customization, sharing, and collaboration
Energy saving for air supply in a real WWTP: Application of a fuzzy logic controller
No full textAn unconventional cascade control system, for the regulation of air supply in activated sludge wastewater treatment plants (WWTPs), was tested. The dissolved oxygen (DO) set point in the aeration tank was dynamically calculated based on effluent ammonia concentration, following a fuzzy logic based approach. First, simulations were conducted, according to the BSM2 protocol, for a general comparison with more conventional control strategies. It turned out that the effluent quality could be improved by 7-8%, based on the EQI parameter. Moreover, the aeration energy requirement could be reduced up to 13%. Subsequently, the system was installed in a full-scale WWTP. While stably complying with the ammonia effluent standard (10 mg/L), excess air supply was prevented, and a reduction of the specific power consumption (kWh/kgCODremoved) of 40-50% was recorded with respect to the previously installed PID controller (fixed DO set point)
A Systematic Review on Pill and Medication Dispensers from a Human-Centered Perspective
Full text linkAs medication adherence represents a critical challenge in healthcare, pill and medication dispensers have gained increasing attention as potential solutions to promote adherence and improve patient outcomes. Following the PRISMA (Preferred Reporting Items for Systematic reviews and Meta-Analyses) methodology, we carried out a systematic literature review on papers indexed in Scopus and PubMed, which present solutions for pill or medication dispensers. Given the importance of user acceptance for these solutions, the research questions of the survey are driven by a human-centered perspective. We first provide an overview of the different solutions, classifying them according to their stage of development. We then analyze each solution considering its hardware/software architecture. Finally, we review the characteristics of user interfaces designed for interacting with pill and medication dispensers and analyze the involvement of different types of users in dispenser management. On the basis of this analysis, we draw findings and indications for future research that are aimed to provide insights to healthcare professionals, researchers, and designers who are interested in developing and using pill and medication dispensers
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