Search results for "universal"
showing 10 items of 678 documents
On Almost Nilpotent Varieties of Linear Algebras
2020
A variety \(\mathcal {V}\) is almost nilpotent if it is not nilpotent but all proper subvarieties are nilpotent. Here we present the results obtained in recent years about almost nilpotent varieties and their classification.
MR2569913: Rodríguez, José. Some examples in vector integration. Bull. Aust. Math. Soc. 80 (2009), no. 3, 384–392. (Reviewer: Luisa Di Piazza),
2009
The paper deals with some classical examples in vector integration due to Phillips, Hagler and Talagrand, revisited from the point of view of the Birkhoff and McShane integrals. More precisely, the author considers: - Phillips' example of a Pettis integrable function f which is not Birkhoff integrable [R. S. Phillips, Trans. Amer. Math. Soc. 47 (1940), 114--145; MR0002707 (2,103c)]. It is proved here that f is universally McShane integrable. - Hagler's example of a scalarly measurable l∞-valued function g which is not strongly measurable. The function g is proved to be universally Birkhoff integrable. - Talagrand's example of a bounded Pettis integrable function φ having no conditional expe…
Wittgenstein a la luz de Aristóteles
2008
This paper compares the way Aristotle explains how one body gets alive or the way one mind manages to understand, with the way Wittgenstein discusses some questions as how is it possible to get meaning from the sign, or to follow a rule. The paper’s goal is not to establish a real influence of Aristotle on Wittgenstein, but to explore some logical aspects of their explanation patterns, with the aim of clarifying several notions of Wittgenstein’s later philosophy. El artículo compara el modo como Aristóteles explica que un cuerpo llegue a vivir o que una mente llegue a entender, con el esquema explicativo que emplea Wittgenstein para dar cuenta de problemas como éstos: ¿qué hace posible que …
Museums as disseminators of niche knowledge: Universality in accessibility for all
2019
Accessibility has faced several challenges within audiovisual translation Studies and gained great opportunities for its establishment as a methodologically and theoretically well-founded discipline. Initially conceived as a set of services and practices that provides access to audiovisual media content for persons with sensory impairment, today accessibility can be viewed as a concept involving more and more universality thanks to its contribution to the dissemination of audiovisual products on the topic of marginalisation. Against this theoretical backdrop, accessibility is scrutinised from the perspective of aesthetics of migration and minorities within the field of the visual arts in mu…
Reliability of rainfall kinetic power-intensity relationships
2017
The rainfall erosivity plays a fundamental role in water soil erosion processes and it can be expressed by its kinetic power. At first in this paper the raindrop size distributions measured, in the period June 2006- March 2014, by an optical disdrometer installed at the Department of Agricultural and Forestry Sciences of University of Palermo are aggregated into rainfall intensity classes, having different ranges, and the measured kinetic power values are determined. Measured kinetic power values are initially used for testing the applicability of the kinetic power-rainfall intensity relationships proposed by Wischmeier and Smith (1978), used in Universal Soil Loss Equation (USLE), Brown an…
Wait-and-switch relaxation model: Relationship between nonexponential relaxation patterns and random local properties of a complex system
2006
The wait-and-switch stochastic model of relaxation is presented. Using the ``random-variable'' formalism of limit theorems of probability theory we explain the universality of the short- and long-time fractional-power laws in relaxation responses of complex systems. We show that the time evolution of the nonequilibrium state of a macroscopic system depends on two stochastic mechanisms: one, which determines the local statistical properties of the relaxing entities, and the other one, which determines the number (random or deterministic) of the microscopic and mesoscopic relaxation contributions. Within the proposed framework we derive the Havriliak-Negami and Kohlrausch-Williams-Watts funct…
Las Naciones Unidas frente a una década de conflicto e impunidad en Yemen
2021
El conflicto del Yemen está cerca de cumplir 10 años. En el mismo, la ONU ha llevado a cabo una actividad constante de intervención, sin que hasta el momento ninguno de los mecanismos puestos en marcha haya conseguido su objetivo fundamental de detener el conflicto y acabar con la impunidad a la que se ve condenada su población civil. Ante la mayor crisis humanitaria acaecida en lo que va de siglo, este estudio se plantea la labor de la Organización y qué respuesta podría ser la adecuada. The conflict in Yemen is nearing its 10th year. The UN has been constantly intervening in the conflict, but so far none of the mechanisms put in place has achieved its fundamental objective of stopping the…
Museums as Disseminators of Niche Knowledge
2019
Accessibility has been facing several challenges within Audiovisual Translation Studies and has also gained great opportunities for its establishment as a methodologically and theoretically well-founded discipline. Audiovisual translation modes have achieved a crucial role in the transmission of what scholarly studies have discussed in relation to media accessibility as a set of services and practices providing access to audiovisual media content for persons with sensory impairment. Today accessibility has become a concept involving more and more universality, since it is extensively contributing to the dissemination of audiovisual and visual products about issues on minorities, and also ad…
An Ex-vivo Shear and tensile bond strengths of orthodontic molar tubes bonded using different techniques
2017
Background Molar bonding procedures need continuous improvement to be widely accepted clinically and eventually replace molar bands. Material and methods The purpose of this study was to determine the effects of enamel micro-abrasion and silane coating of the base of molar tubes on shear and tensile bond strengths of orthodontic molar tubes. A total of 200 third molars were randomly allocated into five groups of 40 teeth as follows: group 1: molar tubes bonded to etched teeth (37% phosphoric acid gel; control group); group 2: molar tubes bonded to etched teeth (37% phosphoric acid) with the addition of silane to the base of molar tubes; group 3: molar tubes bonded to teeth pre-treated with …
Effects of different powder to liquid ratios on the push out bond strength of CEM cement on simulated perforations in the furcal area
2017
Background Proper bond strength to dentin is one of the properties of biomaterials used for therapeutic purposes such as repair of furcal perforations. The aim of the present study to evaluate the effects of different powder to liquid ratios of Calcium-enriched mixture (CEM) on the push-out bond strengths in simulated perforations in the furcal area and compare it with Mineral trioxide aggregate (MTA). Material and Methods Furcal perforations, measuring 1.3 mm in diameter and 2 mm in height, were prepared in 120 mandibular first molars. Then the samples were randomly assigned to two groups (n=60). MTA and CEM cement were used for the repair of perforations in groups 1 and 2, respectively. E…