1,720,970 research outputs found
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
Acute changes in jump-test scores after a submaximal aerobic exercise bout
No full textThe percentage of skeletal muscle fast-twitch fibers (FTF) positively correlates with the scores of squat jump (SJ) and counter movement jump (CMJ) power-tests (Bosco and Komi, 1976). Exercise-induced selective glycogen depletion of slow-twitch fibers (STF) and an enhanced recruitment of FTF during subsequent dynamic exercise has been recently demonstrated (Krustrup, 2004). Since few studies evaluated changes in jump-test scores following a single glycogen-depleting exercise bout, the aim of this study was to compare acute changes of SJ and CMJ test scores before and after a 40-min exercise bout performed at an intensity promoting a high selective glycogen depletion of STF.
Seven well trained (at least 3 years; 7 training sessions each week) middle distance runners (26.6±6 yr; 66.7±7 kg) underwent a maximal incremental running test to determine lactate threshold speed (LTS). Treadmill speed was plotted against blood lactate concentration [La-] obtained during the test and speed at the blood [La-] of 4 mmol•L-1 (Mader, 1976) was recorded as LTS. Subjects rested for 3 days, then underwent the SJ and the CMJ tests, before (t0) and immediately after (t1) an acute 40-min exercise bout performed at their own LTS. LTS was chosen as the optimal exercise intensity because: i) have been stated (see Weineck, 2001) that endurance trained athletes reach their LTS at approximately 80% of maximal oxygen consumption (V’O2max); and ii) have been reported (Gollnick, 1974) that endurance exercises performed at nearby 85% of V’O2max triggers selective glycogen depletion of STF. The Wilcoxon (matched-pair) non-parametric statistics was used to compare t0 vs. t1 test results. A p<.05 was considered significant.
Results evidenced, at t1, significant increases in both SJ (+8.1%) and CMJ (+5.6%) power-tests.
In conclusion, an acute exercise bout, depleting selectively STF glycogen content, increases explosive strength, possibly via an enhanced recruitment of FTF
Effect of a 16-month exercise training program on functional capacities in a centenarian male master athlete: A case study
Full text linkThe effects of exercise training have never been investigated in centenarians. This single-subject research study aimed to assess the effects of a structured training protocol on functional capacities in a centenarian master athlete. A 99.5 years old male subject participated in the study. Before and after a 16-month training intervention the participant underwent a test battery for flexibility (YMCA sit and reach), balance (single leg stance), upper limb strength (hand grip and pinch strength), and lower limb power (counter movement jump) and muscular endurance (horizontal leg press with 85 kg load). After training, sit and reach (-3 cm) and counter movement jump (-0.5 cm) scores decreased, whereas single leg stance (+1.3 s), left hand grip (+2.0 kg), right hand pinch (+0.5 kg), and horizontal leg press (+2 repetitions) scores increased. Right hand grip strength and left-hand pinch strength did not change after training. When pre- and post-training scores were compared to gender-matched normative values, flexibility resulted well below average, maybe because of a relatively broad age category (>65 years). When more specific age categories were available, the participant’s balance resulted slightly below average (age category 80-99 years) and upper limb strength above average (age category >85 years). No normative values were found for lower limb power and muscular endurance. In conclusion, this study highlights that structured exercise training may play a role in maintaining – and even in increasing – functional capacities in the oldest old age
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