1,721,028 research outputs found
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
Short-Term Dynamic Processes at the Restless Nisyros Caldera, Greece: Insights from Joint and Simultaneous Potential Field, Geodetic and Seismic Records
No full textGravity and deformation time series data are employed both to quantify the long-term subsurface dynamics at restless calderas and for forecasting volcanic activity. Critical to the interpretation of residual gravity data in terms of magma dynamics is the assessment of signals stemming from phenomena such as, for instance, secular variations in the level of the ground water table and the mass/density changes in active hydrothermal systems. An earlier study at the restless Nisyros caldera in Greece revealed short-term (40-60 min) gravity variations with amplitudes similar to those observed during annual microgravimetric surveys. It was inferred that these short-term variations might be caused by the hydrothermal/magmatic degassing process itself (for instance, the generation, ascent and dissipation of steam pockets from the boiling hydrothermal reservoir along fracture zones or faults as well as transient pressure variations during steam/liquid interface propagation). To investigate the short-term dynamics in more detail, we ran a two-week field experiment in May 2006 in the hydrothermal areas of the collapse caldera, using one continuously recording gravimeter, two field gravimeters, three GPS receivers, one seismometer, one very-low-frequency (VLF) receiver and one audiomagnetotelluric (AMT) receiver. In addition, an AMT survey was conducted within the caldera in order to map the electrical structure of the caldera. Gravimetric and geodetic data were recorded at a frequency of 1 Hz (with the exception of the field gravimeters, operated at 0.0033 Hz), the 5 s period seismometer recorded at 125Hz and the electromagnetic data were collected at a frequency of 21.75 kHz. Preliminary results reveal residual gravity changes of up to 40 microGal (peak-to-peak amplitudes) which are not attributable to deformation effects. The power spectrum of the entire continuous gravity record reveals marked periods between 45 and 50 min consistent with earlier observations performed during discrete gravimetric readings. The same periodic signal was also recorded in VLF-EM inphase values. The correlation between the seismic and gravimetric record indicates coupling effects of seismogenic events with sub-surface mass migration. The preliminary evaluation of the continuous gravimetric and continuous VLF-EM outphase records indicates a negative correlation, whereby gravity decreases with increasing outphase values. The joint record lead us to the preliminary conclusion that the major part of the short-term geophysical signals at the caldera is related to dynamic processes in a shallow hydrothermal system at a depth of less than 500 m. Magmatic signals would need to exceed this hydrothermal signal in order to be seen
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
The dynamics of prolonged unrest at caldera volcanoes: Insights from joint and simultaneous potential field, geodetic and seismic records at nisyros, greece
No full textAuthor-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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