1,721,141 research outputs found
Diagnostic de l'impact du climat sur les rendements de canne à sucre 2022 à La Réunion et évolution 2004-2022
Full text linkA travers une analyse des prévisions de rendements avec le modèle de culture Mosicas depuis 2002, l’objectif est de réalisé un diagnostic permettant d’expliquer l’influence du climat sur les rendements obtenus lors de la dernière campagne sucrière à La Réunion.
Files included:
- input folder: MOSICAS input file
- Weather and irrigation data folder: MOSICAS input climatic data
- output folder: MOSICAS output file
- DATA folder:
2002_2020_surface-canne_maille-BRIO: change in sugarcane area
TABLE_RU_LAT_LONG: table of pixel identification and locatio
Evolution des rendements canniers potentiels de 2002 à 2019 sur des stations météorologiques de La Réunion
Full text linkCette étude évalue les prédictions de rendement de canne à sucre sur des zones sélectionnées de l'île de La Réunion sur la période couvrant 2002 à 2019. Au total, 15 zones correspondant à des stations climatiques du CIRAD et Météo France ont été sélectionné dans les différents bassins agricoles de l'île. Le modèle MOSICAS a été appliqué pour prédire les rendements en tige usinable fraiche en tenant compte des conditions climatiques (rayonnement, température, évapotranspiration et précipitation) et des conditions pédologiques (réserve utile). Les variations moyennes de rendement potentiels sont évaluées en fonction de l'altitude, des températures moyennes et des précipitations. Les variations annuelles au sein de chaque station climatique sont présentées en annexe
Impact du changement climatique sur les rendements canniers dans les 50 prochaines années à La Réunion
No full textCette étude évalue les prédictions de rendement de canne à sucre sur des zones sélectionnées de l’île de La Réunion sur la période couvrant 2015 à 2065, suivant trois scénarios de changement climatique (réchauffement limité à 2, 3 ou 6°C). Les prédictions de température et de précipitations ont été obtenues à partir du projet BRIO (Building Resilience in Indian Ocean) de Météo France. Le modèle MOSICAS a été appliqué pour prédire les rendements en tige usinable fraiche en tenant compte des conditions climatiques (rayonnement, température, évapotranspiration et précipitation)
Experimental data set of cover crop mixture and weed control in tropical summer and winter in Reunion Island.
No full textWeed pressure is a main biotic constraint in tropical agriculture. Cover crop mixtures have increased in popularity to limit weed growth through competition for shared resources but the relation between cover crop diversity and weed suppression is still under debate. This study aimed to assess the impact of increasing cover crops diversity (one to four species) on weed control during two 4-month growing seasons (tropical summer and winter) in Reunion Island. Weed control was expressed in terms of ground cover by weeds and weed aboveground dry mass and linked to cover crop traits in the mixtures
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
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