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NOUVELLE PERSPECTIVE POUR LA CARTOGRAPHIE DE LA DYNAMIQUE RECENTE DES PAYSAGES AGRAIRES: APPLICATION AUX CULTURES MARAICHERES ET FOURRAGERES DU PPI DE BORJ TOUMI (NORD-EST DE LA TUNISIE)
No full textThis paper aims to map the evolution of land cover and land use in Borj Toumi\u27s PPI for the period 2015-2019 (from May to July). The study examines the aptitudes of irrigation water use in the new environment characterized by "demand management" and its impact on management mode. The methodological approach is inspired by a new cartographic vision based on the use of Sentinel 2A and Landsat 8 / OLI images. The monitoring (intra-annual and inter-annual) and estimation of irrigated plots (vegetable and fodder crops) is based on the calculation and cross referencing of indicators (NDVI and NDWI) from multi-sensor images. The cartographic and statistical results show that the areas dedicated to market gardening and fodder crops are estimated at nearly 300 hectares for the month of May (2015 and 2016). However, a decline of around 50% is recorded during the month of July (same period). In addition, an average regression rate of around 163.9% for Sentinel images and 124.42% for Landsat images is recorded for the period 2017-2018. A slight increase in irrigated areas is observed for 2019 (watered year). Several factors are behind these fluctuations. However, the weighting factor lies in the application of a specific irrigation water management plan, which manifests itself in the distribution of only 20% of the usual volumes during drought phases
Web-mapping for ecotourism development: Application in the Ichkeul national park (northern Tunisia)
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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Essai typologique des périmètres irrigués du Gouvernorat d’El Kef (Nord-ouest de la Tunisie): Un outil pour diagnostiquer et juger les performances des exploitations agricoles
Get PDFThe present work attempts to construct a typology of the irrigated perimeters (IP) of the Governorate of El Kef (northwestern Tunisia), identify groups of homogeneous perimeters based on a certain number of criteria, develop a powerful analysis tool for decision-makers and strengthen the credibility of intervention options. The typology is based on functional criteria which are the area allocated to cereals, vegetable crops, trees and fodder crops. The classification carried out using Saaty\u27s AHP method made it possible to assess the weight vector of the entry criteria for 87 irrigated perimeters and to classify them. From this analysis, we identified four types of perimeters: the large and very diversified perimeters of class A, those moderately diversified of class B, the small perimeters with a monocultural system of class C and finally those of class D which are not farmed. The results from the typology using the AHP method of Saaty and another cartographic method show signs of similarity on the order of 93% and show that 2/3 of the IPs are considered globally as poor (monocultural system or not farmed), 29 are efficient (very diverse) and 7 are moderately diverse.
Keywords: Irrigation, El Kef, Typology, Saaty\u27s AHP method, MappingLe présent travail tente de réaliser des essais typologiques pour les périmètres irrigués (PI) du Gouvernorat d’El Kef (Nord-Ouest de la Tunisie), de dégager des groupes de périmètres homogènes en se basant sur un certain nombre de critères, de former un outil d’analyse performant aux décideurs et de renforcer la crédibilité des choix d’intervention. La typologie entreprise est basée sur des critères fonctionnels qui sont la superficie allouée aux céréales, aux cultures maraîchères, à l’arboriculture et aux cultures fourragères. La classification effectuée au moyen de la méthode AHP de Saaty a permis d’évaluer le vecteur de poids des critères d’entrée pour 87 périmètres irrigués et de les classer. Au terme de cette analyse, on retient quatre types de périmètres: les grands périmètres très diversifiés de la classe A, ceux moyennement diversifiés de la classe B, les petits périmètres appliquant un système monocultural de la classe C et enfin ceux de la classe D qui ne sont pas exploités. Les résultats issus de la typologie par la méthode AHP de Saaty et d’une autre méthode cartographique montrent des signes de similarité de l’ordre de 93 % et montrent que 2/3 des PI sont considérés globalement comme médiocres (système monocultural ou non exploité), 29 sont performants (très diversifiés) et 7 sont moyennement diversifiés.
Mots clés: Périmètre irrigué, El Kef, Typologie, Méthode AHP de Saaty, Cartographiqu
Variations on the Author
Get PDF“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
Get PDFWe 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
Get PDFWe 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
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