1,725,862 research outputs found

    O Projecto Rios e a melhoria de rios e ribeiras

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    Neste trabalho tem-se como objectivos principais apresentar: a estratégia de implementação do Projecto Rios em Portugal, os contributos deste projecto para a melhoria de rios e ribeiras, apresentar os resultados de algumas actividades desenvolvidas com alunos de diferentes graus de ensino e com a população local. São ainda indicadas algumas medidas utilizadas para a concretização destas actividades.FCT - PTDC/AFR/69094/200

    O Projecto Rios e a melhoria de rios e ribeiras

    No full text
    Neste trabalho tem-se como objectivos principais apresentar: a estratégia de implementação do Projecto Rios em Portugal, os contributos deste projecto para a melhoria de rios e ribeiras, apresentar os resultados de algumas actividades desenvolvidas com alunos de diferentes graus de ensino e com a população local. São ainda indicadas algumas medidas utilizadas para a concretização destas actividades.FCT - PTDC/AFR/69094/200

    Renaturalização de rios e córregos no município de São Paulo

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    A cidade de São Paulo tem grande parte de suas áreas úmidas drenadas e aterradas. A ocupação das várzeas traz diversos problemas para o município, comprometendo a paisagem natural dos rios e córregos. Os problemas abrangem desde a interrupção dos processos ecossistêmicos até questões de drenagem superficial. A reabertura de alguns trechos dos rios e córregos do município talvez contribua para a conscientização ambiental dos paulistanos, principalmente a respeito da localização dos rios e da péssima condição das águas. A abertura dos canais como solução para o retardo do escoamento das águas superficiais tem sido avaliada como menos dispendiosa do que a construção e manutenção de piscinões. Este pode ser o início de um processo de valorização das áreas úmidas do município de São Paulo, mesmo que de maneira indireta.</jats:p

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Variations on the Author

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    “Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship

    Appropriate Similarity Measures for Author Cocitation Analysis

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    We provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis

    Os tempos dos rios e das cidades

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    A  história  dos  rios  pode  ser  inferida  a  partir  da  história  das  cidades  que  percorrem.  Partindo  do reconhecimento  da  organização  territorial  da  bacia  hidrográfica  do  rio  Leça   (Portugal)  em  três momentos temporais das últimas décadas, assinalam-se e contextualizam-se as relações e mútuas adaptações  entre  rios  e  cidades,  evidenciando-se  como  os  diferentes  tempos  de  decadência  e degradação ou revalorização e revitalização entretecem a sua atual condição.Abstrac

    Dispelling the Myths Behind First-author Citation Counts

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    We conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more sophisticated methods

    Author Index

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