Disturbance history and dynamics of an old-growth nothofagus forest in Southern Patagonia

The identification of disturbance events using disturbance chronologies has become a valuable tool in reconstructing disturbance history in temperate forests worldwide; yet detailed reconstructions of disturbance history and their effect on the structure and dynamics of the old-growth Nothofagus forests in the southern Patagonia are scarce. We reconstructed forest dynamics and disturbance history of an old-growth N. pumilio forest in the Toro River Valley, Santa Cruz, Argentina using dendroecological techniques. Since a variation in the disturbance regimes was expected with changing elevation, we sampled at different elevations. We found distinct differences in forest structure, dynamics, and disturbance history with changes in the elevation. The disturbance chronologies provided robust evidence that forests in the study area have been subjected to multiple disturbance events over the last 200 years. Yet, recognizing the agent of disturbance could be difficult in these montane forests and further studies are required. Moreover, disturbances might have varied from frequent, moderate-to high-severity events to less frequent and more severe events. This study represents the first of its kind for the temperate forests of Patagonia.Fil: Amoroso, Mariano Martin. Universidad Nacional de Río Negro. Sede Andina. Instituto de Investigaciones en Recursos Naturales, Agroecología y Desarrollo Rural; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Blazina, Ana Paula. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentin

An econometric approach to macroeconomic risk. A cross country study

A contribution to the study of volatility and country risk is made in order to achieve a successful crosscountry comparison. We present a methodology for the evaluation of country risk that include endogenous detection of multiple structural breaks (also identifying its different kinds), determination of persistence of shocks through their structural-break free fractional integration order and determination of the adjusted volatility which best characterizes the economy. This methodology is applied to developed and emerging countries' GDPs (taking 9 countries from each group). Although the former have fewer structural breaks than the latter, these breaks are extremely relevant in 14 of the 18 countries. This affects the calculation of the series persistence and volatility. Comparing a traditional risk indicator to our suggested one we find that the cluster of reference of 60% of the countries changes. Most countries present fractional integration (long memory) being the distribution between both groups heterogeneous. Country volatility varies strongly if we isolate structural breaks that present a probabilistic distribution different from intrinsic GDP volatility. Clusters arrangement is different with some risk country evaluation methodologies.Risk, Volatility, Persistence, Structural breaks, Forescastability, Macroeconomic variables, Cross country analysis

O véu de Penélope . Estatuto da filosofia e o seu ensino

Relatório de Estágio apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Ensino da Filosofia no Ensino SecundárioO presente relatório divide-se em duas partes: uma descritiva, onde se apresenta uma apreciação da primeira experiência da prática de ensino, realizada no ano lectivo de 2011/2012 e outra parte reflexiva, onde se pensa sobre a natureza da filosofia e do seu ensino a partir do legado filosófico de Sócrates, Aristóteles, Kant e Hegel

Covid-19 overlapping with systemic sclerosis

sem informação5

On the characteristic functional of a doubly stochastic Poisson process: Application to a narrow-band process

The characteristic functional (c.fl.) of a doubly stochastic Poisson process (DSPP) is studied and it provides us the finite dimensional distributions of the process and so its moments. It is also studied the case of a DSPP which intensity is a narrow-band process. The Karhunen–Loève expansion of its intensity is used to obtain the probability distribution function and a decomposition of this Poisson process. The covariance derived from the general c.fl. is applied in this particular DSPP.Project MTM2004-05992 of Dirección General de Investigación, Ministerio de Ciencia y Tecnologıí

Combination of factors that increase the risk of contamination by geohelminths larvae in the south coast of Bahia, Brazil/ Combinação de fatores que aumentam o risco de contaminação por larvas de geohelmintos no litoral sul da Bahia

The lack of basic sanitation and improper pet owner's habits on contaminated environments are essential elements for soil-transmitted helmithiasis. The objective herein was to confirm beach sands contamination by geohelminths larvae and to construct geospatial scenarios combining the factors involved. Sand samples (n=162) were collected by a standardized method and investigated by an adapted microscopy technique. All data were statically tested by Pearson correlation coefficients, Student’s or Tukey’s t tests with 5% of significance. A significant higher contamination of beach sands by geohelminths larvae (p0,001) occurred where combination of anthropogenic factors (improper sewage and sanitation, and the presence of dogs) with increased relative humidity (60 to 85%) and higher temperatures (23 to 28o C) at the height sites ( 2 meters) in relation to sea surface. Larvae of Strongyloides stercoralis were more frequent in the beach sands contaminated by improper sanitation and sewage (33%; p 0.01) and Ancylostoma spp. were more frequent in the beach sand with the presence of dogs (38%; p 0.01). Beach contamination by geohelminths’ larvae increases when a combination of factors occurs such as improper handling of waste, inadequate sewage disposal and the presence of dogs in the highest sites of the shoreline

TURISMO DE SEGUNDA RESIDÊNCIA: espaço e impactos sociais

O presente trabalho traz à discussão a temática da Segunda Residência, seus conceitos e o contextohistórico de seu surgimento no Brasil. A proposta apresentada traz à luz do conhecimento uma metodologia quebusca apontar e demonstrar de forma mais clara os impactos causados pela implantação de casas e condomíniosde casas de temporada no âmbito socioespacial. Na busca por métodos que auxiliassem a execução do mesmo,foi encontrado na metodologia de EIS - Estudo de Impacto Social, a ferramenta que possibilita analisar os dadosprimários coletados junto à área de estudo, à comunidade adjacente e ao setor comercial do município. Baseadonas avaliações destes dados é possível realizar considerações e responder às questões que nortearam as pesquisas

Looking for students' enthusiasm: flipped classroom

The “flipped classroom” is a pedagogical model that consists of putting certain learning processes outside the classroom so that the teacher can devote more class time to students’ acquisition of practical skills, for example. In this way, the teacher is not limited to the transmission of course content, but in addition assumes the role of a mediator in the cognitive process, allowing students to actively construct their own knowledge. In this role, the teacher’s main task is to encourage students to become independent learners. This paper describes the implementation and initial results of the application of the flipped classroom in higher education. This study is part of a larger research project to improve our students’ motivation through the use of the flipped learning. The sample consisted of about 3000 students taking 17 different subjects, in Management and Administration Business, Finance and Accounting, Marketing and Market Research, and Chemistry, at the University of Málaga, and in Accounting and Administration, Business Communication and Marketing at the Polytechnic of Porto. According to our results, students’ motivation and class attendance increased with the application of this model; a comparison of the final exam results from two years with traditional classes and from two years with flipped learning shows that the proportion of students failing the exam decreased, which confirms that the use of this pedagogic model improves student learning.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. This project is financed by Educational Innovation Projects 2017-2019 from Malaga University

Discrimição étnico racial: um desafio educacional sócio contemporâneo

Anais do II Seminário Seminário Estadual PIBID do Paraná: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes — Foz do Iguaçu: Unioeste; Unila, 2014O objeto do presente artigo é mostrar a realidade racista existente na sociedade e refletida no âmbito escolar. Diante de tal contexto, fez-se necessário propor um projeto de intervenção, almejando superar tal preconceito. Asssim, um grupo de professores do Colégio Estadual Cristo Rei, elaborou o projeto “A educação não tem cor”. O referido projeto, por meio de estudos e debates críticos, trabalha com respaldo na legislação vigente, além de autores que abordam o tema em questão. O projeto, desenvolvido desde 2006, culmina na semana da Consciência Negra com exposição dos trabalhos realizados durante o ano letivo com os estudantes. Com as observações das graduandas do PIBID, surgiu a oportunidade de enriquecer o projeto em pauta, por meio da realização do “Cine Cultura: o negro em debate”. A proposta das pibidianas busca desenvolver a prática reflexiva dos envolvidos, para apropriação positiva do tema abordado, utilizando-se de filmes para intervenções, tanto em suas ações docentes, como sociai

Initial growth crown cover of cerrado species from different sucessional groups

This study had the objective to evaluate the initial growth and crown cover of native cerrado species of different successional groups in planting forest restoration in Chapadão do Sul, MS, with an experiment installed in February of 2013 to test restoration models. Twelve species were selected, being four pioneers: Anadenanthera falcata, Cybistax antisyphilitica, Platypodium elegan and Samanea tubulosa; four early secondary species: Dipteryx alata, Sterculia striata, Alibertia edulis and Enterolobium contortisiliquum; and four late secondary species: Cedrela fissilis, Copaifera langsdorfii, Handroanthus roseo-albus and Hymenaea stilbocarpa. Diameter at soil height (DSH), total height and crown diameter were measured at 8, 14, 20 and 26 months after planting. the periodic increase in height and DSH were calculated by species, group and age, and the crown area at 26 months. The highest increases in height and DSH were from the pioneers group and from the early secondary until 26 months, and the lowest increases were from the late secondary species. The species within each group vary their initial investment in height and DSH. The pioneers group presented the largest crown areas, while the late secondary group presented the smallest