324,357 research outputs found
Shear-induced particle segregation in binary mixtures: Verification of a percolation theory
No full textGranular materials composed of different-sized grains may experience undesired segregation. Segregation is detrimental for a lot of industries because it leads to an increase in production costs and wastes. For these reasons, the segregation phenomena have been intensively studied in the last decades, and a lot of models have been provided by many researchers. However, these models are mainly based on empirical relations rather than physical considerations. This paper aims to confirm the main assumptions made by Volpato, Tirapelle, and Santomaso (2020) in their percolation theory by means of DEM simulations. The simulated geometry is a tilting shear box filled with few tracer particles in a bed of coarser sized grains, and simulations are performed for a range of tilting frequencies and size ratios. The results provide meaningful insight on the mathematical model parameters and allow us to say that the percolation theory relies on physically consistent assumptions
Santa Caterina da Siena, Opera omnia. Testi e concordanze. (CD-Rom). Editore: Centro Riviste, Pistoia.
No full textDr Antonio Volpato provided a critical text of Catherine of Siena's Letters, based upon the main families of manuscripts, that represents a stage towards the elaboration of the critical edition that he's preparing for the Istituto Storico Italiano per il Medioevo.For late 14th century and Catherine's work scholars, this text completely substitutes N. Tommaseo's 19th century edition. Previously, Prof. E. Dupré Theseider's 1940 work, that included just 88 letters, was the only one available.Each form and lemma of the corpus, that, besides the Letters, is composed of Prof.a G. Cavallini's edition of the Dialogue and the Orations, has been recorded by Mr F. Sposini in the list of the forms and lemmas of the CD-ROM.As the letters were dictated to different secretaries, who reproduced Catherine's language with many graphic and phonetic variations, and as the preserved manuscripts retain the elements of the Sienese dialect to different degrees, the correspondence between the standard form of the lemma and the other allotrope forms has been recorded on a list called "Lemmas with variations", that will result valuable for research on History of the Italian Language.This text of the letters, in a pre-print form, has been used by Sister S. Noffke for the English translation: The Letters of Catherine of Siena, Translated with introduction and notes by S. Noffke O.P., Arizona Center for Medieval and Renaissance Studies, Tempe, Arizona, voll. I-II, 2000-2001 (Letters 1 to 212, further volumes are to be published)
A moralidade vinculada à ação comunicativa e ao direito em Habermas
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Filosofia e Ciências Humanas, Programa de Pós-graduação em Filosofia, Florianópolis, 2010Neste trabalho investigar-se-á a moralidade proposta por Jürgen Habermas no sentido de determinar a relação desta com a ação comunicativa e com o sistema jurídico defendidos por este autor. Para isso, inicialmente, se verificará por que esse autor considera que sua ação comunicativa é capaz de obter consensos racionais como solução para conflitos, entre eles, conflitos morais. O que implica, entre outras coisas, na demonstração do princípio universal de sua ética e o que defende por princípio do discurso. Este último definido por ele como necessário de ser respeitado não só na solução de conflitos morais, mas também na solução do que essa teoria compreende por conflitos éticos e por conflitos pragmáticos. Tal defesa, conforme se observará aqui, é um dos quesitos que essa teoria respeita para vincular os conteúdos justificados por meio dela à condição histórica dos indivíduos sobre os quais se aplica. Investigar-seá a análise habermasiana de críticas de Hegel a Kant para verificar por que essa ética considera essa vinculação necessária para a efetivação dos seus consensos morais, bem como também para verificar por que Habermas considera que realiza essa vinculação. Porém, a pluralidade cultural presente nas sociedades pós-tradicionais obriga a este autor lançar mão de um sistema jurídico para a moralidade se realizar nessas. Analisar-se-á aqui esse sistema de modo a se verificar como esse possibilita o uso da argumentação racional para a obtenção de suas normas, o que implica na compreensão do princípio democrático habermasiano, e de como, por meio da coação jurídica, contribui para a efetivação e para a própria obtenção dessas normas de modo que a moralidade seja respeitada nesses processos.This thesis investigated the morality as proposed by Jürgen Habermas in order to determine its relation to communicative action and the legislative system, as defended by the author. To achieve that, at first, the author's observation was verified to comprehend why he believes communicative action can obtain rational consensus as conflict solution, such as, moral conflicts. What has been brought about as a consequence to Habernas demonstration of ethics universal principle, which he defends as discourse principle: defined as necessary of respect, not only to solve moral conflicts, but also, to solve what the theory comprehends as ethical and pragmatical conflicts. Such argument has been observed as one of the aspects employed in the theory to bond the defended contents over which it is applied. Hebermas analysis on Hegel's and Kant's critiques was also investigated to verify why does ethics consider the correlation necessary to moral consensus effectiveness, as well as to verify why does it consider and performs this correlation. However, post-traditional societies cultural plurality has required the author to account for a legislative system to moralitys achievement on such contexts. This system was analyzed in order to verify the formulation of possibilities of rational argumentation to obtain its rules, which implied on the understanding of Habermas democratic principle as well as on how judicial coercion contributes to these rules effectiveness and achievement so that morality came to be respected in these processes
The Relationship Between Anxiety, Depression and Treatment Adherence in Chronic Obstructive Pulmonary Disease: A Systematic Review
No full textEleonora Volpato,1,2 Stefania Toniolo,1 Francesco Pagnini,1,3 Paolo Banfi2 1Department of Psychology, Università Cattolica del Sacro Cuore, Milan, Italy; 2Heart-Respiratory Rehabilitation Unit, IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy; 3Department of Psychology, Harvard University, Cambridge, MA, USACorrespondence: Eleonora Volpato Email [email protected]: Almost half of the people with chronic obstructive pulmonary disease (COPD) do not adhere to the prescribed treatments and report anxiety and depression as comorbidities, resulting in higher rates of exacerbations, hospitalizations, and worse clinical outcomes.Objective: This systematic review provided a synthesis of studies about the relationships between anxiety, depression, and adherence in people affected by COPD.Methods: English language publications were searched in the PUBMED, SCOPUS, PsycInfo, Web of Science, PsycArticles, and Cochrane Library databases from December 2020 to March 2021, following PRISMA guidelines. The reference lists of eligible studies and other relevant systematic reviews were also searched. Data extraction and critical appraisal were undertaken by two reviewers working independently. The reference lists of eligible studies and other relevant systematic reviews were also searched. Data extraction and critical appraisal were undertaken by two reviewers working independently.Results: A total of 34 studies (23 quantitative and 2 qualitative studies, 9 reviews) were included. The relationship between depression and treatment adherence was significant and negative. Adherence to both rehabilitation, psychological, and antidepressant pharmacological treatments in depressed patients was linked to a decreased risk of hospitalization. Moreover, depressed patients compliant with an antidepressant were more likely to adherent to COPD maintenance inhalers. On the other hand, the associations between anxiety and adherence were poorly investigated and high heterogeneity characterized the studies, leading to a weak and variable relationship as well as too few interventions.Conclusion: The systematic review highlights the variability in estimates of the relationship between depression, anxiety, and treatment adherence in COPD. It could be explained by methodological differences across the included studies. This suggests that standardization is critical to improving the precision of the estimates. Recommendations for future research include attention to causal inferences, an exploration of mechanisms to explain the relationships between both anxiety and depression and adherence in COPD, and a comprehensive, systematic approach.Keywords: chronic obstructive pulmonary disease, adherence, compliance, anxiety, depression, systematic revie
Domestication process of two Solanum (section Lasiocarpa) species among Amerindians in the Upper Orinoco, Venezuela with special focus on Piaroa indians
No full textVolpato, Gabriele, Rossella Marcucci, Noemi Tornadore, and Maurizio G. Paoletti (Department
of Biology, University of Padua, 325100 Padova, Italy; email corresponding author:
[email protected]). DOMESTICATION PROCESS OF TWO SOLANUM SECTION LASIOCARPA SPECIES
AMONG AMERINDIANS IN THE UPPER ORINOCO, VENEZUELA, WITH SPECIAL FOCUS ON PIAROA
INDIANS. Economic Botany 58(2):000–000, 2004. Two semi-cultivated Solanum species (S. sessiliflorum
Dunal and S. stramonifolium Jacq.) are utilized by the Amazonian Indians of the
Upper Orinoco Basin in Venezuela. The manner by which they have become partially domesticated
by the Piaroas and other native tribes of this rain forest region is elucidated in the
following text. Both species have two varieties, with and without prickles, the latter the result
of human selection. Patterns of indigenous utilization of these species by the selection of morphologic
forms and to the differentiation of karyotypes of varieties, and exploitation of the
species reflects also in the perception of them among users. S. sessiliflorum is cultivated in
swiddens and has an economic role, whereas S. stramonifolium is grown in dooryards. This
difference is detectable to the Piaroas, as they recognize in their folk taxonomy three different
varieties of the S. sessiliflorum and one of S. stramonifolium, this according to the stage of
domestication of the species and the way in which they are utilized
Fricke S-duality in CHL models
No full textAbstract: We consider four dimensional CHL models with sixteen spacetime supersymmetries obtained from orbifolds of type IIA superstring on K3×T2 by a ZN symmetry acting (possibly) non-geometrically on K3. We show that most of these models (in particular, for geometric symmetries) are self-dual under a weak-strong duality acting on the heterotic axio-dilaton modulus S by a “Fricke involution” S → −1/NS. This is a novel symmetry of CHL models that lies outside of the standard SL(2Z)-symmetry of the parent theory, heterotic strings on T6. For self-dual models this implies that the lattice of purely electric charges is N-modular, i.e. isometric to its dual up to a rescaling of its quadratic form by N. We verify this prediction by determining the lattices of electric and magnetic charges in all relevant examples. We also calculate certain BPS-saturated couplings and verify that they are invariant under the Fricke S-duality. For CHL models that are not self-dual, the strong coupling limit is dual to type IIA compactified on T6/ZN, for some ZN-symmetry preserving half of the spacetime supersymmetries
A representação social da violência / agressividade em adolescentes angolanos que consomem conteúdos violentos através de dispositivos midiáticos
No full textTesis presentada para el Doctorado en Psicología. Año 2021. Orientadora: Andréa Volpato Wronsk
Modeling of segregation in dense granular flows
No full textIn this thesis, a continuum framework, composed of equations of mass, momentum and fluctuating kinetic energy, coupled to one capable of describing the evolution of the interface between air and granular material, was used to study the
dense motion of granular materials within two industrially relevant equipments: mixers and silos. The model uses the constitutive equations to close the system of equations and a phenomenological approach to describe the behavior of granular materials. A second model, capable of describing the evolution of the segregation of a bidispersed mixtures through a transport equation, was used to model the segregation. The segregation model is flexible; in fact it is possible to describe the segregation speed using different relationships depending on the segregation mechanisms.
As a first approach, it was decided to adopt a relation deriving from Literature approaches. Despite the use of this relation has led to good results, a further study based on experiments and DEM simulations has been done to improve the
description of the segregation velocity to be used in segregative model
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