1,720,994 research outputs found
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
Moltiplicazione dell'olivo e vivaismo olivicolo in Italia - Review
No full textThe olive nursery industry was founded in Tuscany (Italy) in the second half of the nineteenth century, and today the main production centers are located in Tuscany, Apulia, Calabria and Sicily. In these centers the most important propagation techniques used are grafting, cutting and, to a lesser extent, micropropagation. The paper comments, through an historical analysis, on the innovations achieved in the field of olive propagation (by grafting, cuttings and micropropagation) and highlights the "weak points" of the Italian olive nursery system.
The mist system is now the standard method for olive propagation, and mist propagation is made effective by a combination of modern propagating facilities and automated systems. IBA and NAA are still the most effective auxins for rooting, and their action has been improved by associating polyamines or cyclodextrins. New compounds should be tested, other than auxins, to have a more effective activity in stimulating the formation of adventitious roots, and the molecular basis of the process should be understood. This would allow the cuttings to be pretreated or cotreated, for them to respond to auxin applications with high rooting percentages. As far as grafted plants are concerned, the nurseries have achieved a top efficiency, with success rates of almost 100%, and the technique is very functional since it allows cultivars with low or nil rooting ability (particularly in the case of many cultivars intended for table olive production) to be propagated.
Presently research is focused on the selection of clonal rootstocks, able to increase plant resistance to biotic and abiotic stress, and whole plant architecture. In vitro propagation of olive cultivars has been used with success, and could be an important sector of the olive tree nursery. At present some 33 olive varieties have been micropropagated. Micropropagated plants, though, are expensive because they are extremely labor intensive; it is therefore necessary to focus research on the automation of the process to reduce costs. Plant growth in the nursery is based on the “container system”; the improvements in plant production, to increase the performance and reduce plant prices, concerned the introduction of new types of containers and substrates, the setting up of a protocol of fertigation and symbiotic complex between the olive roots and arbuscular mycorrizhae.
Finally, particular attention is given to the genetic true-to-typeness and plant health certifications of the plants produced. The broadening of the varietal standard, advances in propagation techniques and nursery plant production, and certified plants are the key points for the development of the olive nursery industry in Italy.
Riassunto
Il vivaismo olivicolo in Italia nasce nella seconda metà dell’ottocento in Toscana e ad oggi i principali centri di produzione sono localizzati in Toscana, Puglia, Calabria e Sicilia. Le tecniche di propagazione principalmente utilizzate in questi centri sono innesto, talea e, in minor misura, micropropagazione. La produzione di olivo italiana risulta essere soddisfacente malgrado problemi strutturali e tecnologici che accompagnano il settore. Il lavoro propone, attraverso un’analisi temporale, le innovazioni ottenute nel settore della propagazione dell’olivo (innesto, talea e micropropagazione) ed evidenzia “i punti deboli” del sistema vivaistico italiano. Una particolare attenzione è data alle normative per la certificazione genetico-sanitaria delle piante prodotte. L’ampliamento della base varietale, i progressi nelle tecniche di propagazione e produzione e la disponibilità di piante certificate sono i punti chiave dello sviluppo del vivaismo in Italia
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
