1,721,149 research outputs found
Les Portugais au Maroc
No full textLopes David. Les Portugais au Maroc. In: Revue d'histoire moderne, tome 14 N°39,1939. pp. 337-368
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
Signal reconstruction from partial or modified linear time-frequency representations
No full textThe first section of this thesis reviews such signal dependent techniques and describes a method of inversion for the Reassigned Spectrogram through use of its link to the phase of the Short Time Fourier Transform (ST-FT). In order to achieve this inversion, signal reconstruction is required using only knowledge of the phase of the ST-FT. Such an inversion is shown to be possible to within an overall amplitude constant given mild conditions upon the degree of overlap used in the computation of the ST-FT. Complimentary to signal reconstruction from knowledge of the phase of the ST-FT, is reconstruction from its magnitude. Two distinct approaches are described. The first previously given in the literature, iteratively applies the Minimum Least Squares (MLS) inversion of the complete (amplitude and phase) ST-FT. The second uses an analogous approach to that used for signal reconstruction from phase. Although the first approach proves more robust to non-valid input TF, both of these techniques require a similar degree of overlap to the phase case, and both reconstruct the signal to within an overall phase constant. The description of the theory concludes with a discussion of the set of Generalised Wavelet Transforms (GWTs), of which both the SF-FT and WT are members. After defining the set of GWTs, descriptions are given for the MLS inversion for complete GWT information, and for signal reconstruction from either phase or amplitude. The thesis concludes by using the MLS based technique to create signals from modified or synthetic spectrograms generated using heart sounds. The first application of this is to extend the duration of heart sounds. Temporal extension in this fashion has the ability to extend the signals in time without affecting the spectrum of the sound. In addition, it does not require the use of a model as in matching pursuit based methods described in the literature. The second application is to create at time-series from a synthetic spectrogram constructed by averaging the spectrograms of a patient’s heart murmur. Such averaging cannot take place in the time-domain owing to the random nature of the flow noise in a murmur.</p
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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