1,721,121 research outputs found
Intercalado de cereales con leguminosas. Práctica agroecológica para una agricultura más sostenible
No full textLa agricultura moderna o agricultura convencional, está siendo fuertemente criticada y cuestionada hoy en día debido al uso intensivo de agroquímicos y productos sintéticos que generan interrogantes y preocupaciones sobre la salud del hombre, la contaminación y el daño ambiental. Una alternativa sostenible y con gran potencial para optimizar los sistemas agrícolas gracias a su diversificación, es el intercalado de cultivos, una práctica ecológica que aporta múltiples beneficios tanto productivos como ambientales y económicos. Producir de manera sustentable, será imprescindible y central para la agricultura y los sistemas productivos del futuro. En este trabajo, a partir de investigación, revisión de literatura y una lectura profunda, se presentará un enfoque sobre la intersiembra de cereales con leguminosas. A partir de ejemplos con diferentes cultivos y sistemas, obtendremos una visión detallada sobre su importancia productiva y ecológica, y sobre sus beneficios y limitaciones al ser comparada con monocultivos. Esta práctica agroecológica ofrece la oportunidad de utilizar diferentes nichos y aumentar la diversidad de plantas al sembrar más de un cultivo en el mismo campo al mismo tiempo tratando de imitar a la naturaleza. Las leguminosas se consideran una de las principales especies capaces de proporcionar recursos a la otra cuando pueden interactuar entre si. Es una especie que ha demostrado proporcionar una amplia gama de servicios ecosistémicos, reduciendo la competencia inter-especifica mediante los procesos de complementariedad y facilitación. Entre sus beneficios podemos nombrar el aumento de nitrógeno en el suelo y en los cultivos asociados mediante la fijación del nitrógeno atmosférico, el control de malezas, reducción de ataques y daños por plagas, aumento de estabilidad, permeabilidad, agregación, biomasa y actividad orgánica en el suelo, los cuales serán desarrollados en profundidad
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
Towards pesticide free agriculture in the Pilat Rhodanien, France : a socio-technical systems analysis into barriers and opportunities on a territorial scale
Full text linkThis research was conducted as part of the first phase of a 6-year long project run by INRAE called “Be Creative” (2021-2026). The project’s ambition is to study specific agricultural territories in France in view of designing initiatives with local inhabitants, farmers and other territorial actors for the realization of zero-pesticide agricultural systems. Our territory of study was the Pilat Rhodanien, a geographical zone along the west side of the Rhône river valley, south of Lyon. We investigated viticulture, a prominent and historic production on the plateaus and steep hillsides of this peri-urban landscape. Our goal was to understand the influences on chemical input use in these vineyards through qualitative ethnographic research. This was followed by multi-scalar, thematic analyses using the multi-level perspective on socio-technical transitions, actor network mapping and stakeholder management strategy, which we enriched using a political ecology lens. Our findings center on barriers and opportunities to reduce the use of chemical inputs, notably herbicides and fungicides. The socio-technical lock-ins that we found to be maintaining the use of chemical inputs were multifaceted. We highlight the role of social networks, norms, values, knowledge systems and practices held by the historic, familial and deeply-embedded productions characterized by prestigious geographical indications. We identified actors in these social networks who play diverse roles in the territory related to chemical input use and reduction, their participation and activities being key aspects of agroecological transition processes in the territory. We forecast the next phase of the Be Creative research project, by proposing potential innovations that may further help reduce and/or eliminate pesticide use in the vineyards of the Pilat Rhodanien, many of which rest on multi-actor collaborations.INRAE ; Parc Naturel Régional du Pilat ; NMBU Biovit småforskmidlersubmittedVersionM-A
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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