Intrinsic Lipschitz graphs in Heisenberg groups and continuous solutions of a balance equation

In this paper we provide a characterization of intrinsic Lipschitz graphs in the sub-Riemannian Heisenberg groups in terms of their distributional gradients. Moreover, we prove the equivalence of different notions of continuous weak solutions to the equation \phi_y+ [\phi^{2}/2]_t=w, where w is a bounded function depending on \phi

Some remarks about parametrizations of intrinsic regular surfaces in the Heisenberg group

We prove that, in general, H-regular surfaces in the Heisenberg group H1 are not bi-Lipschitz equivalent to the plane R2 en- dowed with the "parabolic" distance, which instead is the model space for C1 surfaces without characteristic points. In Heisenberg groups Hn, H-regular surfaces can be seen as intrinsic graphs: we show that such parametrizations do not belong to Sobolev classes of metric-space valued maps

Intoxicações provocadas pelo herbicida paraquat: estudo de 219 casos

Trabalho de Conclusão de Curso - Universidade Federal de Santa Catarina. Curso de Medicina. Departamento de Saúde Pública

Cognitive reserve in dementia: Implications for cognitive training

open9noCognitive reserve (CR) is a potential mechanism to cope with brain damage. The aim of this study was to evaluate the effect of CR on a cognitive training (CT) in a group of patients with dementia. Eighty six participants with mild to moderate dementia were identified by their level of CR quantified by the CR Index questionnaire (CRIq) and underwent a cycle of CT. A global measure of cognition mini mental state examination (MMSE) was obtained before (T0) and after (T1) the training. Multiple linear regression analyses highlighted CR as a significant factor able to predict changes in cognitive performance after the CT. In particular, patients with lower CR benefited from a CT program more than those with high CR. These data show that CR can modulate the outcome of a CT program and that it should be considered as a predictive factor of neuropsychological rehabilitation training efficacy in people with dementia.openMondini, Sara; Madella, Ileana; Zangrossi, Andrea; Bigolin, Angela; Tomasi, Claudia; Michieletto, Marta; Villani, Daniele; Di Giovanni, Giuseppina; Mapelli, DanielaMondini, Sara; Madella, Ileana; Zangrossi, Andrea; Bigolin, Angela; Tomasi, Claudia; Michieletto, Marta; Villani, Daniele; Di Giovanni, Giuseppina; Mapelli, Daniel

The Mechanism of Electrochemically-Mediated Photoredox Catalysis with Organic Superoxidants

openThe combination of one photon and one electron through the concomitant use of photocatalysis and electrochemistry creates a tool with unprecedented reactivity, capable of driving extremely challenging reactions. The aim of this thesis was to investigate the electrochemical characteristics of aryl amines as photo-redox catalysts, thanks to their ability to absorb photons after electrochemical oxidation, achieving excited-state potentials up to 4.4 V vs SCE. This remarkable reactivity was tested in the oxidation of benzene derivatives. The mechanism of action of these superoxidants was elucidated through quantitative analysis of the reaction rate constants using a combination of cyclic voltammetry and simulation software.The combination of one photon and one electron through the concomitant use of photocatalysis and electrochemistry creates a tool with unprecedented reactivity, capable of driving extremely challenging reactions. The aim of this thesis was to investigate the electrochemical characteristics of aryl amines as photo-redox catalysts, thanks to their ability to absorb photons after electrochemical oxidation, achieving excited-state potentials up to 4.4 V vs SCE. This remarkable reactivity was tested in the oxidation of benzene derivatives. The mechanism of action of these superoxidants was elucidated through quantitative analysis of the reaction rate constants using a combination of cyclic voltammetry and simulation software

Hybrid subjects in Spanish and Catalan: Halfway between agents and patients

We analyze an intransitive construction involving verbs like Spanish matarse ‘kill’ whose subjects appear to have both internal and external argument properties. Examples include Juan se mató en un accidente de coche ‘Juan got himself killed in a car accident’, in which the subject’s referent shows hybrid behavior between agent and patient as it needs to be engaged in an action leading to its accidental death. We propose that the subject’s internal and external argument properties can be accounted for if subjects can bear two semantic roles by virtue of being associated with more than one distinct head in the syntax (Pineda & Berro 2020). We argue that such intransitive uses involve a distinct argument structure from transitive reflexives despite sharing the same surface form, cf., El sospechoso del homicidio se mató al estar rodeado por la policía ‘The suspect killed himself when he was surrounded by the police’. The present account provides evidence that agents and external arguments do not always correlate since some verb classes can have identical surface form, despite involving underlyingly distinct argument alignment.Ausensi was supported by the project PID2022-136610NB-I00 (MCIN/AEI/10.13039/501100011033/FEDER, UE). Bigolin was supported by the grant FPI PRE2018-085396 (AEI/European Social Fund), and projects PID2021-123617NB-C41 (Ministerio de Ciencia e Innovación) and 2021SGR00787 (AGAUR-Generalitat de Catalunya)

Resultatives and low depictives in English

We argue against a purely semantic account of the Unique Path Constraint (Goldberg, Adele. 1991. It can’t go down the chimney up: Paths and the English resultative. In Proceedings of the seventeenth annual meeting of the Berkeley Linguistics Society, 368–378.), i.e., the constraint that there can only be one result state in a single clause, and in favor of a syntactic restriction regarding event structure. We propose, following Mateu, Jaume & Víctor Acedo-Matellán. 2012. The manner/result complementarity revisited: A syntactic approach. In M. Cristina Cuervo & Yves Roberge (eds.), The end of argument structure? Syntax and semantics, 209–228. New York: Academic Press, that structurally there can only be one result predicate per clause since the little v head selects for one result predicate as its complement. In order to make our claim, we provide novel data that violate the Unique Path Constraint defined as a semantic constraint. Further, we analyze examples that at first blush pose a problem for the present account as they appear to involve two result phrases, e.g., shot him dead off the horse. We argue, however, that the second result phrase is not syntactically a result, but rather constitutes a case of what Acedo-Matellán, Víctor, Josep Ausensi, Josep Maria Fontana & Cristina Real-Puigdollers. forthcoming. Old Spanish resultatives as low depictives. In Chad L. Howe, Timothy Gupton, Margaret Renwick & Pilar Chamorro (eds.), Open romance linguistics 1. Selected papers from the 49th linguistic symposium on romance languages. Berlin: Language Science Press have called low depictives, which join the syntactic derivation through a low applicative head.The first author acknowledges financial support from the project Connecting Conceptual and Referential Models of Meaning 2 (CONNECT 2) (PI: Louise McNally) from the Ministerio de Economía y Competitividad (FFI2016-76045-P;AEI/MINEICO/FEDER, UE) and from an ICREA Academia award to Louise McNally. The second author acknowledges financial support from a Formación de Personal Investigador (FPI) grant from the Spanish Agencia Estatal de Investigación (Ministerio de Ciencia, Innovación y Universidades) and the European Social Fund, within the project Redes de variación microparametricas en las lenguas románicas (PIs: Ángel Gallego and Jaume Mateu) from the Spanish Ministerio de Economía, Industria y Competitividad (FFI2017-87140-C4-1-P)

A historical account on characterizations of C1-manifolds in Euclidean spaces by tangent cones

Abstract A historical account on characterizations of C 1 -manifolds in Euclidean spaces by tangent cones is provided. Old characterizations of smooth manifold (by tangent cones), due to Valiron (1926, 1927) and Severi (1929, 1934) are recovered; modern characterizations, due to Gluck (1966, 1968) and Tierno (1997) are restated. All these results are consequences of the Four-cones coincidence theorem due to [1]

Indicators to assess the quality of organizational attention: first steps towards a measurement instrument

Organizations increasingly have access to varied and sophisticated information about their internal and external environments. While there is the general belief that accessing high quality and sophisticated information leads to more effective decisions, this is not necessarily true. In a number of disciplinary fields, from economics to psychology and technology, scholars are emphasizing that information overload produces confusion and reduces consistent decision-making. This paper focuses organizational attention and presents a tool to assess the quality of organizational attention mediated by technology. This instrument was tested and will soon be applied in a pilot study to further refine it.This work has been supported by CAPES Foundation, Ministry of Education of Brazil and by FCT –Foundation for Science and Technology within the Project Scope UID/CEC/00319/2013