1,720,962 research outputs found
Sprint triathlon race does not induce myocardial dysfunction as assessed by myocardial deformation imaging and left ventricle torsion analysis
No full text
Heart failure and severe pulmonary hypertension caused by distal detachment of the valve conduit 16 years after the Cabrol composite graft procedure
No full textWe report the case of a patient who underwent Cabrol composite graft procedure for ascending aorta aneurysm and aortic regurgitation. Sixteen years later he developed progressive dyspnea and a left-to-right shunt caused by distal detachment of the valve conduit with persistence of the perigraft space-right atrial fistula visualized with echocardiography. Our case shows that late manifestations of surgical complications of the Cabrol procedure may occur and transesophageal echocardiography may allow a comprehensive assessment in these patients. However, because surgical management of ascending aorta aneurysms has changed in the last decades a detailed knowledge of the surgical technique used is mandatory for adequate interpretation of transesophageal echocardiographic result
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
ECRES,a sofware to prevent the exercise induced hypoglycaemia in type 1diabetic patients:preliminary results.
No full textGlucose PulseA simple method to estimate the amount of glucose oxidized duringexercise in type 1 diabetic patients
No full textAbstract
This study shows
that heart rate can be a useful physiological
parameter to be used to estimate the
amount of glucose oxidized during exercise.
The correlation coefficients between
heart rate and GLUox were greater than
0.95 in all volunteers, both healthy and
type 1 diabetic subjects, indicating a
highly significant correlation between the
two variables. This relationship is the basis
of the “glucose pulse” concept, defined
as the GLUox expressed per unit of heart
rate. Endurance training leads to a lower
GLUox (16,17), which was also observed
in the present study with a lower glucose
pulse in aerobically trained patients. The
relationship between the glucose pulse
and the percentage of maximal theoretical
heart rate is not linear. Nevertheless, if
only a heart rate below 70% of maximal is
considered, the following linear equations
apply:
trained 0.00353 0.0023
%HRmax 0.1428 0.1328 (n 23,
R 0.846)
and
sedentary 0.00597 0.0035
%HRmax 0.1801 0.1891 (n 24,
R 0.869).
In nonobese type 1 diabetic individuals
without autonomic neuropathy, the
current equations can be used to calculate
glucose oxidation during exercise based
on easily measurable heart rate. From
these concepts, it is possible to use simple
tables matching heart rate, glucose oxidation,
and dietary equivalents to be ingested,
thus providing a potential clinical
tool for prevention of exercise-related hypoglycemia
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
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