Um sistema conversacional de consulta para artigos de periódicos

SCAB (Periodical Article on-line Retrieval System) is a system designed for retrieval via remote terminal of bibliographical references to articles in periodicals. On-line operation is handled' by TSO (Time Sharing Option), which performs the interface with the Operating System. The retrievals of information is controlled through on-line dialogue between the user and the system using a SCAP conversational language which is easy to learn without prior knowledge of computational techniques. The creation and. maintenance of the Data Base is carried out in batch mode, independent of the on-line retrieval operation; the system is designed to maintain large collections of periodicals.O SCAP (Sistema Conversacional de Consulta para Artigos de Periódicos) é um sistema orientado para recuperação, via terminal, de referências bibliográficas de artigos de periódicos. A operação “on-line” é feita através do TSO (Time Sharing Option) que perfaz a interface com o Sistema Operacional. A recuperação da informação é feita através do diálogo “on-line” SCAP - USUÁRIO, por intermédio de uma linguagem conversational própria, de fácil aprendizado, mesmo para pessoas sem qualquer conhecimento na área de computação. A criação e atualização do banco de dados é feita em ‘‘batch”, independentemente do funcionamento “on-line”, tendo sido o sistema projetado para armazenar grandes coleções de artigos

Genetic variation among accessions of the genus Manihot by ISSR markers

O objetivo deste trabalho foi avaliar a diversidade genética intra e interespecífica de acessos de Manihot por meio de marcadores ISSR. Foram analisadas cinco espécies e duas variedades de Manihot, além de duas espécies do gênero Croton, utilizadas como grupo externo, por meio de 20 oligonucleotídeos iniciadores (Olii) ISSR UBC. Para análise do índice de similaridade entre as espécies e os acessos foram utilizados os coeficientes de Jaccard e de 'simple matching'. Os 20 Olii testados foram altamente polimórficos para todas as espécies analisadas, e 89,7% dos locus foram polimórficos. Há maior similaridade genética entre espécies diferentes de Manihot, como M. dichotoma var. undulata e M. caerulescens, do que entre indivíduos da mesma espécie, como M. dichotoma e M. dichotoma var. undulata.The objective of this work was to evaluate the genetic diversity within and among accessions of Manihot by using ISSR markers. Five species and two varieties of Manihot, besides two species of the genus Croton, used as the out-group, were analyzed by using 20 oligonucleotide (Olii) ISSR UBC primers. To analyze the similarity index between species and accessions, the Jaccard and simple matching coefficients were used. The 20 Olii tested were highly polymorphic in all species analyzed, and 89.7% of the loci were polymorphic. A higher genetic variability is observed among different species of Manihot, such as M. dichotoma var. undulata and M. caerulescens, than among individuals of the same species, such as M. dichotoma and M. dichotoma var. undulata

Educación y pensamiento contemporáneo: práctica, experiencia y educación.

El libro emplea las nociones de experiencia y práctica como instrumentos filosóficos para la investigación en educación y pedagogía. Aunque se trata de conceptos que han sido retomados y elaborados desde los trabajos de Foucault, el trabajo conjunto adelantado al interior de la Red Riepco ha permitido continuar con la exploración de la potencia metodológica de los conceptos mediante el diálogo con otras perspectivas, autores e investigaciones. De este modo, se proponen lecturas cruzadas y diálogos con planteamientos como los de Gilles Deleuze, Judith Butler, Peter Sloterdijk, Giorgio Agamben, Jorge Larrosa, Boaventura de Sousa Santos, Roland Barthes, Michel de Certeau y el mismo Emil Cioran. Todo ello bajo la comprensión que investigar, pensar y hacer filosofía, se configuran como ejercicios para modelar y crear problemas, interrogantes y, por tanto, formas de mirar.The book uses notions of experience and practice as philosophical tools for researching in education and pedagogy. Although these concepts have been taken up and elaborated from Foucault’s work, the joint work carried out with RIEPCO has allowed the exploration of the methodological power of these concepts in order to dialogue with other perspectives, authors and research. In this way, cross readings and dialogues with approaches such as those of Gilles Deleuze, Judith Butler, Peter Sloterdijk, Giorgio Agamben, Jorge Larrosa, Boaventura de Sousa Santos, Roland Barthes, Michel de Certeau and Emil Cioran himself are proposed. All this under the understanding that researching, thinking and doing philosophy are configured as exercises to model and create problems and, therefore, ways of looking

Educación y pensamiento contemporáneo: práctica, experiencia y educación.

El libro emplea las nociones de experiencia y práctica como instrumentos filosóficos para la investigación en educación y pedagogía. Aunque se trata de conceptos que han sido retomados y elaborados desde los trabajos de Foucault, el trabajo conjunto adelantado al interior de la Red Riepco ha permitido continuar con la exploración de la potencia metodológica de los conceptos mediante el diálogo con otras perspectivas, autores e investigaciones. De este modo, se proponen lecturas cruzadas y diálogos con planteamientos como los de Gilles Deleuze, Judith Butler, Peter Sloterdijk, Giorgio Agamben, Jorge Larrosa, Boaventura de Sousa Santos, Roland Barthes, Michel de Certeau y el mismo Emil Cioran. Todo ello bajo la comprensión que investigar, pensar y hacer filosofía, se configuran como ejercicios para modelar y crear problemas, interrogantes y, por tanto, formas de mirar.The book uses notions of experience and practice as philosophical tools for researching in education and pedagogy. Although these concepts have been taken up and elaborated from Foucault’s work, the joint work carried out with RIEPCO has allowed the exploration of the methodological power of these concepts in order to dialogue with other perspectives, authors and research. In this way, cross readings and dialogues with approaches such as those of Gilles Deleuze, Judith Butler, Peter Sloterdijk, Giorgio Agamben, Jorge Larrosa, Boaventura de Sousa Santos, Roland Barthes, Michel de Certeau and Emil Cioran himself are proposed. All this under the understanding that researching, thinking and doing philosophy are configured as exercises to model and create problems and, therefore, ways of looking

Local hydrological conditions influence tree diversity and composition across the Amazon basin

Tree diversity and composition in Amazonia are known to be strongly determined by the water supplied by precipitation. Nevertheless, within the same climatic regime, water availability is modulated by local topography and soil characteristics (hereafter referred to as local hydrological conditions), varying from saturated and poorly drained to well-drained and potentially dry areas. While these conditions may be expected to influence species distribution, the impacts of local hydrological conditions on tree diversity and composition remain poorly understood at the whole Amazon basin scale. Using a dataset of 443 1-ha non-flooded forest plots distributed across the basin, we investigate how local hydrological conditions influence 1) tree alpha diversity, 2) the community-weighted wood density mean (CWM-wd) – a proxy for hydraulic resistance and 3) tree species composition. We find that the effect of local hydrological conditions on tree diversity depends on climate, being more evident in wetter forests, where diversity increases towards locations with well-drained soils. CWM-wd increased towards better drained soils in Southern and Western Amazonia. Tree species composition changed along local soil hydrological gradients in Central-Eastern, Western and Southern Amazonia, and those changes were correlated with changes in the mean wood density of plots. Our results suggest that local hydrological gradients filter species, influencing the diversity and composition of Amazonian forests. Overall, this study shows that the effect of local hydrological conditions is pervasive, extending over wide Amazonian regions, and reinforces the importance of accounting for local topography and hydrology to better understand the likely response and resilience of forests to increased frequency of extreme climate events and rising temperatures

Geographic patterns of tree dispersal modes in Amazonia and their ecological correlates

Aim: To investigate the geographic patterns and ecological correlates in the geographic distribution of the most common tree dispersal modes in Amazonia (endozoochory, synzoochory, anemochory and hydrochory). We examined if the proportional abundance of these dispersal modes could be explained by the availability of dispersal agents (disperser-availability hypothesis) and/or the availability of resources for constructing zoochorous fruits (resource-availability hypothesis). Time period: Tree-inventory plots established between 1934 and 2019. Major taxa studied: Trees with a diameter at breast height (DBH) ≥ 9.55 cm. Location: Amazonia, here defined as the lowland rain forests of the Amazon River basin and the Guiana Shield. Methods: We assigned dispersal modes to a total of 5433 species and morphospecies within 1877 tree-inventory plots across terra-firme, seasonally flooded, and permanently flooded forests. We investigated geographic patterns in the proportional abundance of dispersal modes. We performed an abundance-weighted mean pairwise distance (MPD) test and fit generalized linear models (GLMs) to explain the geographic distribution of dispersal modes. Results: Anemochory was significantly, positively associated with mean annual wind speed, and hydrochory was significantly higher in flooded forests. Dispersal modes did not consistently show significant associations with the availability of resources for constructing zoochorous fruits. A lower dissimilarity in dispersal modes, resulting from a higher dominance of endozoochory, occurred in terra-firme forests (excluding podzols) compared to flooded forests. Main conclusions: The disperser-availability hypothesis was well supported for abiotic dispersal modes (anemochory and hydrochory). The availability of resources for constructing zoochorous fruits seems an unlikely explanation for the distribution of dispersal modes in Amazonia. The association between frugivores and the proportional abundance of zoochory requires further research, as tree recruitment not only depends on dispersal vectors but also on conditions that favour or limit seedling recruitment across forest types