1,721,206 research outputs found
Diagnóstico de la calidad de los aislamientos eléctricos empleando el método de las descargas parciales (TAMYA)
No full textIP 1106-06-751-98Incluye anexos.v.1. Diagnostico de la calidad de los aislamientos electricosempleando elmetodo de las descargas parciales (TAMYA) / Hector Cadavid, Guillermo Aponte M., Juan CarlosVelezM. -- v.2. Diagnostico de la calidad de los aislamientos electricos empleando el metodo de las descargas parciales (TAMYA) : Informe ejecutivo / Hector Cadavid, Guillermo Aponte M., Juan Carlos Velez M
Diagnóstico de la calidad de los aislamientos eléctricos empleando el método de las descargas parciales (TAMYA)
No full textIP 1106-06-751-98Incluye anexos.v.1. Diagnostico de la calidad de los aislamientos electricosempleando elmetodo de las descargas parciales (TAMYA) / Hector Cadavid, Guillermo Aponte M., Juan CarlosVelezM. -- v.2. Diagnostico de la calidad de los aislamientos electricos empleando el metodo de las descargas parciales (TAMYA) : Informe ejecutivo / Hector Cadavid, Guillermo Aponte M., Juan Carlos Velez M
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
Investigation of yeast community of “Grillo” grapes and musts from Marsala wine production area.
Full text linkThe oenological interest in the autochthonous yeast applications has increased since they represents an important supplement to wine quality (Martinez et al. 1989; Moreno et al. 1991). Yeast populations harboured onto the surface of berries and in musts of “Grillo” grape variety were isolated and analyzed. In order to obtain a first blastomycetic mapping of Marsala wine production area, eight vineyards were chosen on the basis of different climatic and agronomic parameters, including altitude, exposure,vineyard age, grape biotype, grape cultivation system, vegetative vigour, pruning, green pruning, yield per plant, phytosanity state, irrigation and closeness to wood areas. Analysis of blastomycetic populations was performed by cell counts on specific culture media for yeasts. Cell concentrations were evaluated on grapes and unfermented musts and during spontaneous must micro-fermentations at different times (after 3 and 13 days). Furthermore, during micro-fermentations non-Saccharomyces populations were distinguished from presumptive Saccharomyces based on the appearance of colonies after growth onto Wallerstein Laboratory (WL) nutrient agar (Pallman et al. 2001). Non-Saccharomyces reached about 106 - 107 CFU/ml both at the third and at the thirteenth day, while Saccharomyces exhibited variable cell concentrations, in particular, the majority of experiments showed level around 104 CFU/ml at the third day and almost all samples reached level of about 106 CFU/ml at the thirteen day. Saccharomyces cell concentrations positively correlated with weight loss registered during fermentations, since higher weight loss values were found in samples with their higher levels. After colony morphology inspection, 54 isolates were collected from grapes and unfermented musts and 60 during must micro-fermentations after 3 and 13 days, forming a total of 114 isolates. They were clustered into eight groups and into nine groups by optical microscopic observation of cell morphologies. Strain typing and differentiation was carried out by randomly amplified polymorphic DNA (RAPD-PCR) (Moschetti et al. 1998) and the band patterns were analyzed by means of the unweighted pair group method using arithmetic average clustering algorithm (UPGMA). The representative strains of each group are being genetically identified. So far, analysis of D1/D2 region of the 26S rRNA gene revealed the presence of Candida zampliinina, Hanseniaspora uvarum, Issatchenkia terricola, Metschnikovia pulkerrima, Saccharomyces cerevisiae and Zygosaccharomyces bailii. Moreover, the study was specifically oriented to the Saccharomyces spp. strains, which were isolated from musts fermented for 21 days using a “modified ethanol sulphite agar” (MESA), prepared from ESY medium. A total of 42 cultures were collected and 28 presumptive Saccharomyces yeasts, as selected by microscopic observation, were confirmed to be Saccharomyces spp. through amplification of ITS-5.8S rRNA region (Esteve-Zarzoso et al. 1999). All the isolates were typed as above reported. The representative strains of each group were characterized for technological traits with interest in wine production such as hydrogen sulphide production, ethanol tolerance and potassium metabisulphide resistance. Strains showing the best performance were used to carry out “Grillo” must micro-fermentations lasting 13 days to select yeast starter cultures. The work is still in progress
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