Search results for "Cone"
showing 10 items of 772 documents
Mutaciones de la conexina 26 y 30 : correlación audiológica
2012
Los transtornos auditivos afectan aproximadamente el 10% de la población, produciendo alteraciones en el lenguaje y el habla, así como en el desarrollo cognitivo y psico-social, llegando a ser un factor limitante para la calidad de vida. La hipoacusia es frecuente en niños, siendo la hipoacusia neurosensorial (HNS) la forma más común de déficit auditivo congénito. La incidencia se estima en 1:1.000 recién nacidos para hipoacusias severas a profundas mayores a 50 dB y sobre 4:1.000 RN si se incluyen las formas leves a moderadas. Aproximadamente el 50% de las hipoacusias prelinguales se producen por causas genéticas, y actualmente se conocen numerosos genes involucrados con el daño auditivo. …
La revitalización de la conexión jurisdiccional en fuente como solución global para la imposición a la renta empresarial por servicios
2020
Nuestra investigación parte de advertir la existencia de un estado de crisis global respecto del ejercicio de la potestad tributaria sobre la renta empresarial transfronteriza y la consiguiente búsqueda de una solución basada en un consenso y compromiso en la materia. La caracterización “en crisis” resume la ineficacia de las reglas vigentes para garantizar la imposición a la renta empresarial transfronteriza en forma sistemática y armónica, problemática que es causa de distorsiones, ineficiencias y pérdida de bienestar global. Ante dicho escenario, y en un contexto altamente internacionalizado, ciertamente nos inclinamos por una solución de carácter global; en efecto, siendo objetivos dese…
La coordinación copulativa con y: condiciones de coordinabilidad
1987
En este trabajo pasamos revista a los diferentes requisitos de coordinabilidad aducidos en la bibliografía que se ha ocupado del tema. Hecho esto, y después de haber presentado el modelo explicativo de la coordinación copulativa que defendemos, tratamos de mostrar que ese modelo es capaz de explicar las condiciones gramaticales a que está sujeta la coordinación copulativa en español.
Itinerarios De M-Learning en La Educación Universitaria
2015
In recent years, mobile devices like smartphones, tablets, and laptops allow immediate connection and content exchange among people "anytime, anywhere" (Park S.Y., et al. 2012). 'Ubiquitous learning’ becomes very important in higher and university education also in order to emphasize the educational paths’ design and maximize students’ learning opportunities. At this regard, it‘s interesting to consider the assumptions of the connectivism theory (Siemens, 2005) as a theoretical reference for the e-learning design. For verifying these assumptions and clarifying whether Italian teachers and students share them, we conducted this research. This empirical study aims to grasp what type of mobile…
Belief, acceptance and knowledge
2009
According to Contextualism about knowledge, it is possible that a subject, with the same amount of evidence and the same degree of con-viction, knows that P in a context and not in another. In this paper, I favor the invarationist conception of knowledge by drawing a distinction between belief and acceptance."Know", I defend, does not change in meaning across contexts, althoughI acknowledge it is not correct to self ascribe knowledge when one does not accept that P. Según la posición contextualista puede ocurrir que con las mis-mas evidencias y el mismo grado de convicción, un sujeto sepa que P en un contexto y no en otro. Mediante la distinción entre aceptación y creencia, se combate tal p…
Fixed point results in cone metric spaces
2010
We prove a result on points of coincidence and common fixed points for three self mappings satisfying a weak generalized contractive type condition in cone metric spaces. We deduce some results on common fixed points for two self mappings satisfying a weak contractive type condition in cone metric spaces. This results generalize some well-known recent results.
On fixed points of Berinde’s contractive mappings in cone metric spaces
2010
In this paper we establish some common fixed point theorems for two self-mappings satisfying a generalized contractive condition. This result generalizes well known comparable results in the literature. As an application, a necessary and sufficient condition for a fixed point to be a periodic point for the mapping involved therein, without appealing to continuity, in a cone metric space is established.
Fixed point results in cone metric spaces for contractions of Zamfirescu type
2010
We prove a result on points of coincidence and common fixed points in cone metric spaces for two self mappings satisfying a weak generalized contractive condition of Zamfirescu type. We deduce some results on common fixed points for two self mappings satisfying a weak contractive type condition. These results generalize some well-known recent results.
Coupled fixed-point results for T-contractions on cone metric spaces with applications
2015
The notion of coupled fixed point was introduced in 2006 by Bhaskar and Lakshmikantham. On the other hand, Filipovićet al. [M. Filipovićet al., “Remarks on “Cone metric spaces and fixed-point theorems of T-Kannan and T-Chatterjea contractive mappings”,” Math. Comput. Modelling 54, 1467–1472 (2011)] proved several fixed and periodic point theorems for solid cones on cone metric spaces. In this paper we prove some coupled fixed-point theorems for certain T-contractions and study the existence of solutions of a system of nonlinear integral equations using the results of our work. The results of this paper extend and generalize well-known comparable results in the literature.
Crystal structure, Hirshfeld surface analysis and DFT studies of (E)-1-(4-bromophenyl)-3-(3-fluorophenyl)prop-2-en-1-one
2018
The title halogenated organic chalcone was prepared by a Claisen–Schmidt condensation reaction. A Hirshfeld surface analysis was carried out to reveal the percentage contributions of the intermolecular interactions. A theoretical study was performed using the density functional theory (DFT) at B3LYP with the 6–311 G++(d,p) basis set level to compare with the experimental results of the X-ray analysis and UV–vis absorption analysis in term of the geometrical parameters, HOMO-LUMO energy gap and charge distributions.