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    Análise dos sedimentos turfosos ocorrentes no córrego Guassupé e seu significado ambiental - Cianorte, Paraná

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    Orientador: Prof. Dr. Mauro ParolinDissertação (mestrado em Geografia) - Universidade Estadual de Maringá, 2020RESUMO: A pesquisa foi realizada no município de Cianorte - Paraná, a qual abrange uma pequena área de turfa localizada à margem esquerda do Córrego Guassupé. Os objetivos da pesquisa foram: i) quantificar e mapear as publicações paleoambientais realizadas com sedimentos turfosos no Brasil; ii) analisar e descrever os sedimentos turfosos do Córrego Guassupé e iii) analisar as condições ambientais e paleoambientais da área de estudo. As pesquisas paleoambientais em áreas de turfa no Brasil foram executadas com base nas técnicas de cienciometria. Para as considerações paleoambientais do Córrego Guassupé, determinou-se por meio dos fitólitos que foram extraídos dos sedimentos turfosos. Concomitantemente a essas análises, foram realizadas a granulometria, a queima da matéria orgânica (material volátil e sólido), e a caracterização (in loco) do sedimento turfoso pelo método de von Post. A análise das condições ambientais foi avaliada a partir de levantamentos in loco na área do córrego, fotografia aérea (1980) e imagens de satélite atuais. Para melhor avaliação do córrego, foram também descritas as condições morfométricas do Ribeirão Cristalina, do qual o córrego Guassupé é afluente de primeira ordem. Sobre as pesquisas paleoambientais com turfas no Brasil, foram registrados 22 trabalhos (13 com palinomorfos, 8 com fitólitos, e 1 com espículas de esponja). Ainda é possível inferir a concentração de pesquisas na região Sul, Sudeste e Centro-Oeste, bem como 85% das publicações foram realizadas por instituições públicas. Sobre o Córrego Guassupé, o sedimento tufoso apresenta-se com grau de decomposição e humosidade como sáprica (H-9) na base, hêmica (H-7) na metade do perfil e fibrosa (H-3) no topo. A queima da matéria orgânica volátil apresentou valores médios de 6,4%, enquanto que os sólidos chegaram a 4,5%. O sedimento é arenoso (>55%). Os fitólitos indicaram três fases ambientais: I - estresse hídrico com a presença de alguns tipos de vegetação lenhosa; II - predomínio de vegetação gramínea com algumas formações lenhosas e formação do depósito turfoso e III - aumento da umidade com avanço da vegetação tipo floresta e ação de coluvionamento, recobrindo uma parte da turfa. Em relação às condições ambientais, o córrego Guassupé apresenta uma série de problemas ao longo de seu curso, e.g. erosão, poluição e degradação da encostaABESTRACT: This research was carried out in the municipality of Cianorte - Paraná, covering a small peaty swamp area located on the left bank of the Guassupé Creek. The research objectives were (1) to quantify and map the paleoenvironmental studies about peaty sediments in Brazil, (2) analyze and describe the peaty sediments of the Guassupé Creek and (3) analyze the environmental and paleoenvironmental conditions of the study area. Paleoenvironmental research in peatlands in Brazil was carried out based on scientometrics techniques. For the paleoenvironmental considerations of Guassupé Creek, it was determined through phytoliths that were extracted from peaty sediments. Concomitantly with these analyzes, we carried out the granulometry, the burning of the organic matter (volatile and solid material), and the characterization (in loco) of the peaty sediment following the Von Post method. The analysis of environmental conditions was evaluated based on surveys in the creek area, aerial photography (1980), and current satellite images. For a better assessment of the creek, the morphometric conditions of Ribeirão Cristalina were also described, in which the Guassupé Creek is the first-order tributary. About paleoenvironmental research with peaty sediments in Brazil, 22 works were found out (13 with palynomorphs, 8 with phytoliths, and 1 with sponge spicules). It is still possible to infer the concentration of research in the South, Southeast, and Midwest, as well as 85% of the publications, were carried out by public institutions. On the Guassupé Creek, the peaty sediment has a degree of decomposition and humidity as sapric (H-9) at the base, hemic (H-7) in the middle of the profile, and fibrous (H-3) at the top. The burning of the volatile organic matter showed average values of 6.4%, while solids reached 4.5%. The sediment is sandy (> 55%). Phytoliths indicated three environmental phases: I - water stress with the presence of some types of woody vegetation; II - the predominance of grassy vegetation with some wooden formations and formation of peat deposits and III - increased humidity with advancing forest type vegetation and colluvial action, covering part of the peat. Regarding environmental conditions, the Guassupé Creek presents a series of problems along its course, e.g., erosion, pollution, and degradation of the slope67 f. : il. (algumas color.)

    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

    A PAISAGEM RURAL: um estudo de caso em Barbosa Ferraz - PR

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    Esta pesquisa apresentou como principal enfoque a análise da paisagem do bairro São Joaquim, localizado na área rural do município de Barbosa Ferraz – PR. A análise partiu da concepção de paisagem como sendo resultado da interação entre os elementos da sociedade e da natureza, considerando também os traços culturais materializados pela população no decorrer do período histórico vivido. As atividades desenvolvidas consistiram em: leitura de referencial teórico; mapeamentos temáticos; saídas a campo para obtenção de fotografias e observações da paisagem; entrevistas com pioneiros do bairro; pesquisa de dados históricos; síntese da paisagem. Com o desenvolvimento da pesquisa, verificou-se que a paisagem do bairro passou por inúmeras mudanças desde o início do processo de colonização até os dias atuais, deixando marcas visíveis de tais mudanças
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