1,721,141 research outputs found
Tree Crown Data - MONTANE OSUG
No full textThis repository presents data on tree and crown dimension collected on four plots along an elevation gradient in the French Alps. These data have been collected in the framework of the OSUG project MONTANE : Multi-trophic biodiversity and multi-functionality across Alpine Environments.
The objective of this project was to describe the forest three-dimensional structure and tree species diversity on several selected Orchamp gradients (see more details in [link](https://orchamp.osug.fr/)). In second step this field data were used to calibrate remote sensing methods to describe forest structure and composition at large scale at the individual level with lidar and hyperspectral data (see Tusa et al. 2020). See more information about the protocol at https://forgemia.inra.fr/georges.kunstler/montane_data
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Defoliation induces a trade-off between reproduction and growth in a southern population of Beech
No full textInternational audienceA recommendation – based on reviews by Three anonymous reviewers – of the article: Oddou-Muratorio, S., Petit, C., Journe, V., Lingrand, M., Magdalou, J. A., Hurson, C., Garrigue, J., Davi, H. and Magnanou, E. (2019). Crown defoliation decreases reproduction and wood growth in a marginal European beech population. bioRxiv, 474874, ver. 4 peer-reviewed and recommended by PCI Ecology. doi: 10.1101/47487
Dynamique du paysage et démographie des espèces arborées dominantes : la régénération du hêtre et du chêne sur les grands Causses
No full text[Departement_IRSTEA]GT [TR1_IRSTEA]SET / DYMON [Encadrant_IRSTEA]Curt, T.In the mountains of the Mediterranean Basin, the modifications of the land use drive a strong dynamics of the landscape. The woody species colonize the open area, but the maintenance of grazing and its variability in time and space prevent the existence of any equilibrium. The dynamics of the tree species accounts for a large part of this transformation. In this thesis, we studied the demographic dynamics of Fagus sylvatica and Que cus pubescens in representative habitats of the landscapes of the Causse du Larzac. Light-growth and light-mortality models show that the differences of shade tolerance explain the higher regeneration of the beech in pine understory, in comparison to the oak. We show then that the dynamics of establishment of these species in open habitat is limited by herbaceous competition especially for beech. The shrubs can indirectly facilitate the establishment of trees by reducing the biomass of highly competitive herbs. The advantage of the oak compared to the beech in open environment doesn't result therefore from a better growth in full light but of a better tolerance to herbs competition. The strategies of regeneration of the trees in open habitat with large herbivores, hardly covered in the literature, constitute yet an important part of their regeneration niche. We analyzed the dispersal by animals. The oak is dispersed to longer distance than the beech in open habitat, and the jay, an important dispersal agent, drives to a directed dispersal of the two species toward pine woods in a heterogeneous landscape. This dispersal can thus drive to an important dynamics of beech in the pine groves, whereas for oak the dynamics is limited by its low survival.: Dans les montagnes du pourtour Méditerranéen, les modifications de l`utilisation des terres ont conduit à une forte dynamique du paysage. Les ligneux colonisent les milieux ouverts, mais le maintien du pâturage, sa variabilité dans le temps et dans l`espace empêchent de définir tout point d`équilibre. La dynamique des espèces arborées constitue le processus le plus important de cette transformation. Dans cette thèse, nous étudié la dynamique démographique de Fagus sylvatica et Que cus pubescens dans des milieux représentatifs des paysages du Causse du Larzac. Des modèles reliant la croissance et la mortalité à l`éclairement montrent que, en sous étage de pin, les différences de tolérance à l`ombre expliquent que le hêtre ait une meilleure capacité de régénération que le chêne. Nous avons ensuite montré que la dynamique d`installation de ces espèces en milieu ouvert et tout particulièrement celle du hêtre, est limitée par la compétition des herbacées. Les buissons peuvent faciliter indirectement l`installation en réduisant la biomasse et la capacité de compétition des herbacées. L`avantage du chêne par rapport au hêtre en milieu ouvert ne résulte donc pas d`une meilleure croissance en pleine lumière mais d`une meilleure survie en compétition avec les herbacées. Les stratégies de régénération des arbres en milieux ouverts pâturés, largement ignorées dans la littérature, constituent pourtant une part importante de leur niche de régénération. Nous avons enfin analysé la dispersion par les animaux. Le chêne est dispersé à plus longue distance que le hêtre en milieu ouvert, et le geai, agent de dispersion important, conduit à une dispersion dirigée vers les pinèdes dans un paysage hétérogène. A une échelle plus fine, cette dispersion est aussi dirigée vers les pins isolés dans un milieu ouvert hétérogène. Cette dispersion peut ainsi conduire à une dynamique importante du hêtre dans les pinèdes alors que celle du chêne est limitée par sa faible survie
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