1,721,062 research outputs found
Polfre: a time-frequency dependent polarization tool
No full textMás información: http://diapiro.ictja.csic.es/gt/mschi/SCIENCE/tseries.html#softwareContacto: Martin Schimmel, [email protected] program computes the degree of polarization (DOP) and polarization
attributes for continuous three component (3-C) recordings from individual
seismic stations employing sliding data windows as function of time & frequency.
The employed DOP strategy has been introduced in Schimmel & Gallart (2003)
using analytic signal theory in the t-domain. Later, in Schimmel & Gallart
(2004), the DOP strategy has been extended to the tf-domain, but using now
Eigen theory to compute the polarization attributes.
Signals are identified by having a more stable polarization through a
frequency dependent time window than noise. Therefore, DOP and polarization
attributes are used to detect, analyze and characterize signals which are
more polarized than noise. Among others, the approach permits to determine
the direction of incoming Rayleigh waves and the determination of polarization
spectra. E.g., this code has been used in Schimmel et al. (2011) to
characterize microsesimic noise. All figures of this publication are based
on the polfre output. Note that most recently, the program has also been
employed to analyze ambient noise on Mars (Stutzmann et al.,
2021).
The program needs the SAC library to read and write data with the SAC
binary format. Program descriptions are obtained by executing the codes
without any flag. The package further contains Readme-files with
information and simple examples to show the workflow. Programs are
called through shell scripts or command line and work for Linux/Unix
environments. This software was first edited in 2011 and updated in 2019.European Community Program IHP HPMF-CT-2001-01322
Marie Curie Fellowship; IPG-Paris; Consolider-Ingenio 2010 Program CSD2006‐00041
Topo-Iberia PII200830I202, ILink2010‐0112; Ministerio de Ciencia e Innovación CGL2009‐09727 RIFSISPeer reviewe
TS_PWS0_UG: a program to measure group velocity in seismic noise correlation studies based on phase coherence and resampling strategies
No full textContacto: Martin Schimmel, [email protected]ás información: http://diapiro.ictja.csic.es/gt/mschi/SCIENCE/tseries.html#softwareThis code is for measuring seismic group velocities in noise correlation
studies. It is a semi-automated approach which employs resample
strategies to determine robust group velocities and their bounds.
The input data are noise cross-correlations obtained for a single
station pair before stacking. The TS_PWS0_UG program stacks the
data using a fast time-frequency dependent Phase Weighted Stacking
approach (Ventosa et al., 2017) based on Wavelet theory. The program
measures group velocities as described in Schimmel et al. (2018).
The programs need the SAC library to read and write data with the SAC
binary format. Program descriptions are obtained by executing the code
without any flag. The package further contains Readme-files with
information and simple examples to show the workflow. Programs are
called through shell scripts or command line and work for Linux/Unix
environments. This software was first edited in 2017 and updated in 2018.Ministerio de Economía, industria y competitividad CGL2013-48601-C2-1-R MISTERIOSPeer reviewe
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
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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