Stock price dynamics: an application of the Ehrenfest-Brillouin model to the Italian stock exchange

openIn this thesis, the central point is the application of stock price dynamics of the Italian stock exchange, in the period between June 1973 and April 1998. Given the daily percentage returns, in order to estimate some other parameters, is useful to introduce the preliminary notions of Markov chains and Polya process, essential to understand the Ehrenfest-Brillouin model. This model is fundamental to the interpretation of a moving system of elements in some categories, and that can be applied, in particular, to price increments in a stock market.In this thesis, the central point is the application of stock price dynamics of the Italian stock exchange, in the period between June 1973 and April 1998. Given the daily percentage returns, in order to estimate some other parameters, is useful to introduce the preliminary notions of Markov chains and Polya process, essential to understand the Ehrenfest-Brillouin model. This model is fundamental to the interpretation of a moving system of elements in some categories, and that can be applied, in particular, to price increments in a stock market

Thromboelastometry used for evaluation of blood coagulability in dogs with kidney diseases

Kidney diseases as protein-losing nephropathies are predisposing conditions for thrombosis/thromboembolism in dogs due to increased blood coagulability. The aim of this study was to use thromboelastometry for investigation of changes in haemostasis in dogs affected by renal proteinuria alone or concomitant with azotemia. The study was done at 55 client-owned, healthy (n = 34), proteinuric (n = 14), and proteinuric/azotemic (n = 7) dogs. Blood coagulation was assessed by means of standard coagulation profile and thromboelastometry (in-TEM, ex-TEM, and fib-TEM). In proteinuric dogs only the maximum clot firmness and maximum clot elasticity significantly increased (P P < 0.05) of the variables clotting time, clot formation time, α angle, maximum clot firmness and maximum clot elasticity. After correction for group affiliation, the linear regression analysis showed a non significant association between changes in proteinuria and thromboelastometric profiles. In conclusion, thromboelastometric changes indicating hypercoagulabilty were more consistently found in the dogs with proteinuria/azotemia, than in those with proteinuria alone, suggesting that the former dogs can be considered at higher thrombotic risk. This is the first study where thromboelastometry has been applied to the investigation of haemostatic changes in dogs with kidney diseases

Promote selective attention in 4th-grade students: lessons learned from a school-based intervention on self-regulation

Academic success is a complex concept comprising not only good academic performance, but also the development of competencies and the accomplishment made by the ends of learning. Among the motivational and attentional variables likely to influence academic success, extant literature reports the relevance of developing self-regulation and attentional control to foster school success. Still, little is known about how to foster attentional control competencies through training on self-regulated learning strategies. The present study aims are twofold: (i) to assess the efficacy of a program targetted to promote self-regulation strategies on attentional control, specifically in selective attention, and (ii) to explore the role of selective attention on arithmetic performance. Participants were 136 fourth grade students, aged from 8 to 11 years old. Of those, 68 were enrolled in a school based intervention aimed to promote self-regulation. At the end of the intervention, the experimental group showed higher levels of self-regulation and selective attention that were significantly different when compared to the control group. The SR training has influenced positively participants SA with impact on their arithmetic competencies. The findings of this study can provide relevant insight to better understand these variables and to design better in-class practices.This study was conducted at the Psychology Research Centre (PSI/01662), School of Psy chology, University of Minho, and supported by the Portuguese Foundation for Science and Technol ogy and the Portuguese Ministry of Science, Technology and Higher Education (UID/PSI/01662/2019), through the national funds (PIDDAC). Additionally, this research was partially financed by the Câmara Municipal de Valongo as part of the project “Learning2learn: Self-regulatory promotion intervention program” (212010752—Projeto MAISVAL)

Role of rare earth elements and entropy on the anatase-to-rutile phase transformation of TiO2thin films deposited by ion beam sputtering

The role played by oxygen vacancies and rare earth (RE) elements in the anatase-to-rutile (A−R) phase transformation of titanium dioxide (TiO2) is still a matter of controversy. Here, we report the A−R transformation of TiO2 thin solid films as obtained by ion beam sputtering a RE-decorated titanium target in an oxygen-rich atmosphere. The samples correspond to undoped, single-doped (Sm, Tm, and Tb), and codoped (Sm:Tb, Sm:Tm, and Sm:Tb:Tm) TiO2 films. In the as-prepared form, the films are amorphous and contain ∼0.5 at. % of each RE. The structural modifications of the TiO2 films due to the RE elements and the annealing treatments in an oxygen atmosphere are described according to the experimental results provided by Raman scattering, X-ray photoelectron spectroscopy, and optical measurements. The A−R transformation depends on both the annealing temperature and the characteristics of the undoped, single-doped, and codoped TiO2 films. As reported in the literature, the A−R transformation can be inhibited or enhanced by the presence of impurities and is mostly related to energetic contributions. The experimental results were analyzed, considering the essential and stabilizing role of the entropy of mixing in the A−R transformation due to the introduction of more and multiple quantum states originated in vacancies and impurities in the anatase phase.Fil: Scoca, Diego L.S.. Universidade Estadual de Campinas; BrasilFil: Cemin, Felipe. Universidade Estadual de Campinas; BrasilFil: Aldabe, Sara Alfonsina. Universidad de Buenos Aires; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Figueroa, Carlos A.. Universidade de Caxias Do Sul.; BrasilFil: Zanatta, Antonio R.. Universidade de Sao Paulo; BrasilFil: Alvarez, Fernando. Universidade Estadual de Campinas; Brasi

Phytochemical Screening and Evaluation of the Antimicrobial Activity of the Ethanolic Extract of the Leaves of Morus alba L.

The search for knowledge of biological activities and phytochemical screening of the species Morus alba L. is non- existent, however the present study came to explore this plant. To perform the phytochemical screening and the evaluation of the antimicrobial activity of the leaves of the species Morus alba L. Experimental analysis, with the collection of leaves of the species to obtain hydroalcoholic extract at 70% and from this extract the main secondary metabolites were identified. And after contributing to the systematic knowledge of the secondary metabolites of Morus alba L., antimicrobial activity was tested from the concentrated extracts of the leaves of the species. Among the extracts tested, the one that presented the most inhibitory activity in S. aureus was the concentrate, then the aqueous and finally the alcoholic. In E. coli strains the extracts showed no effects. Phytochemical tests were performed using the concentrated extract using the methods of reference [1], where it presented the presence of reducing sugars, phenols and tannins, alkaloids and depsides and depsidones. The research emphasized the microbiological action of the species Morus alba L., as it is a poorly studied plant and may help in the future in the development of new drugs. Phytochemical studies were necessary to confirm this microbiological action, as they were essential for the identification of natural and efficient antibacterial agents

Contabilidad general: cuadernos de trabajo. Ejercicios para resolver en clase

Proporciona a los estudiantes un recurso de aprendizaje, donde se plantea diversos ejercicios y casos por cada tema desarrollado en el curso, para que ellos los resuelvan gradualmente durante el ciclo, con la siguiente finalidad: Refuercen lo aprendido en clase y lo adquirido mediante lectura de los libros texto del curso. Igualmente, que Identifiquen oportunidades de mejora en su aprendizaje

Estudos Artísticos

Os quinze artigos que aqui se reúnem, nesta edição da Revista Croma, são também as propostas para uma nova política, esclarecida, crítica, e mais exigente. Podem observar-se padrões de intervenção, que partem de algumas dimensões comuns: a interpelação do observador, a criação de novos públicos, a proposta de contribuir para uma mudança alargada, partindo de questões a que não são alheias as problemáticas contemporâneas. As questões de género, a emancipação pós-colonial, a sustentabilidade, as migrações, a massificação, a globalização, o fim das ideologias e a ascensão do populismo, entre outras, constituem os contextos da atualidadeinfo:eu-repo/semantics/publishedVersio