1,721,643 research outputs found
Reseña de: Martín Marcos, David, People of the Iberian Borderlands. Community and Conflict between Spain and Portugal
No full textBook Review: Martín Marcos, David, People of the Iberian Borderlands. Community and Conflict between Spain and Portugal, 1640-1715, New York, Routledge, 2023, 292 págs. ISBN: 9780367758219Reseña de: Martín Marcos, David, People of the Iberian Borderlands. Community and Conflict between Spain and Portugal, 1640-1715, New York, Routledge, 2023, 292 págs. ISBN: 978036775821
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
Grupos armados desfragmentados: la relativización del DIH como régimen autónomo y la búsqueda de visiones alternativas
Full text linkEl texto analiza diversos institutos del derecho internacional que impactan sobre la forma en la que se regula el accionar de los grupos armados, a la luz del marco teórico de la fragmentación del ordenamiento jurídico.Fil: Kotlik, Marcos David. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Heffes, Ezequiel. No especifíca
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
Isolation and characterization of cellulolytic enzymes from the digestive fluid of Rhynchophorus palmarum larvae
No full textThe aim of this research is the isolation and characterization of cellulolytic enzymes from the intestinal fluid of Rhynchophorus palmarum larvae. The experimental stage of this research was divided in two approaches. Initially, cellulolytic microorganisms were isolated from the digestive tract of Rhynchophorus palmarum larvae. A total of 11 bacteria and four fungi and yeast were isolated as result. Additionally, since R. palmarum is listed in the control and restriction list of the European and Mediterranean Plant Protection Organization (EPPO), it was decided to use R. ferrugineus larvae to develop the protocols for the isolation of cellulolytic microorganisms. These protocols were later replied in Ecuador with R. palmarum larvae.
Cellulolytic activity of microbial isolates was tested by staining with Congo red after incubation in a modified substrate with carboxymethylcellulose (CMC) as single source of carbon. As result, a fungus belonging to the Ascomycetes phylum, genus Thielaviopsis species ethacetica, was found to exhibit major cellulolytic activity. In addition, the influence of incubation pH and temperature on the cellulolytic activity of T. ethacetica was evaluated with a D-optimal statistical design, plotted into a response surface. It was found that T. ethacetica has a maximum cellulolytic activity when incubated at pH 4.0 and 20°C.
For the isolation of cellulolytic enzymes, T. ethacetica was incubated at pH 4.0 and 20°C. After four days the incubation broth was treated with ammonium sulfate for protein precipitation. The enzymatic crude extract was assayed in order to determine it optimal pH and temperature as well as the stability at optimized conditions. It was found that cellulolytic enzymes of T. ethacetica exhibit maximum activity at pH 4.5 and 45°C. In these conditions, cellulolytic enzymes of T. ethacetica are stable for 48 hours.Lo scopo di questa ricerca è l’isolamento e caratterizzazione di enzimi cellulosolitici dal fluido intestinale di larve di Rhynchophorus palmarum. La parte sperimentale di questa ricerca è stata divisa in due fasi. Inizialmente sono stati isolati i microrganismi presenti nel tratto digestivo di R. palmarum, dal quale sono stati isolati un totale di 11 diversi batteri e 4 tra funghi e lieviti.
Dato che, il R. palmarum è inserito nella lista di controllo e restrizione della European and Mediterranean Plant Protection Organization (Eppo), è stato deciso di utilizzare le larve di R. ferrugineus, allo scopo di sviluppare i protocolli di isolamento dei microrganismi cellulosolitici. I medesimi protocolli sono stati utilizzati in Ecuador con larve di R. Palmarum. L’attività cellulosolitica di questi microrganismi è stata valutata inizialmente con un metodo qualitativo che prevede l’utilizzo di Congo red e l’incubazione dei microrganismi su terreno agarizzato contenente carbossimetil-cellulosa (CMC) come unica fonte di carbonio.
Dall’analisi del microbiota, è stato selezionato un fungo appartenete al philum degli Ascomiceti, genere Thielaviopsis, specie ethacetica, nel quale è stata riscontrata la maggiore attività cellulosolitica. Successivamente, sono state valutate come le variazioni di pH e temperatura di coltura influenzano l’attività enzimatica. Questo è stato fatto adottando il metodo statistico D-optimal affiancato ad una superficie di risposta. È stato dimostrato che T. ethacetica ha il suo massimo di attività cellulosolitica a pH 4 e ad una temperatura di 20 °C.
Per l’isolamento degli enzimi cellulosolitici, T. ethacetica è stato incubato in un brodo di coltura contenente CMC a pH 4 e ad una temperatura di 20 °C. Dopo 5 giorni di crescita il brodo è stato filtrato e trattato con ammonio solfato per la precipitazione proteica. L’estratto enzimatico è stato testato per determinare l’optimum di temperatura e pH e la sua stabilità in queste condizioni. È stato dimostrato che gli enzimi cellulosolitici di T. ethacetica esprimono la loro massima attività a pH4.5 e ad una temperatura di 45 °C. In queste condizioni, gli enzimi cellulosolitici di T. ethacetica sono stabili per 48 ore
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
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