1,721,100 research outputs found
Quiet stance control is affected by prior treadmill but not overground locomotion
No full textTreadmill locomotion is different with respect
to overground walking and may require an adapted control
mode. The relevant neural computational eVort may produce
lasting eVects encroaching upon the performance of a
subsequent postural task. The hypothesis of the present
study was that, contrary to overground walking, treadmill
walking has eVects on quiet stance variables, in the assumption
that the imposed locomotor activity is more critical to
stance control than natural walking. Nine young subjects
performed three diVerent walking sessions: treadmill with
eyes closed, treadmill with eyes open, overground walking
with eyes open. Body sway area and sway path and the
position of the centre of foot pressure during stance were
recorded by a dynamometric platform under control, postwalking
and post-recovery conditions, alternatively with
eyes closed and eyes open. At variance with overground
walking, treadmill locomotion produced an eVect on body
orientation in space during the subsequent stance trials.
This consisted in a forward inclination of the body, not
accompanied by increased body sway, lasting for a few
minutes. Presence or absence of vision during treadmill
locomotion did not induce diVerences in the amplitude or
time-course of the post-eVect. We argue that body inclination
would be the consequence of a change in the postural
reference produced by a message arising from treadmill
locomotion itself, possibly connected to particularities in
the control mode of this type of walking
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
Post-effect of forward and backward locomotion on body orientation in space during quiet stance.
No full textNeural circuits responsible for stance control
serve other motor tasks as well. We investigated the eVect
of prior locomotor tasks on stance, hypothesizing that postural
post-eVects of walking are dependent on walking
direction. Subjects walked forward (WF) and backward
(WB) on a treadmill. Prior to and after walking they maintained
quiet stance. Ground reaction forces and centre of
foot pressure (CoP), ankle and hip angles, and trunk inclination
were measured during locomotion and stance. In WF
compared to WB, joint angle changes were reversed, trunk
was more Xexed, and movement of CoP along the foot sole
during the support phase of walking was opposite. During
subsequent standing tasks, WB induced ankle extension,
hip Xexion, trunk backward leaning; WF induced ankle
Xexion and hip extension. The body CoP was displaced
backward post-WB and forward post-WF. The post-eVects
are walking-direction dependent, and possibly related to
foot-sole stimulation pattern and trunk inclination during
walking
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
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