1,720,966 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
Proximal stomach function in obesity with normal or abnormal oesophageal acid exposure.
No full textAbstract. There is an increased prevalence of gastrooesophageal
reflux and symptoms in obese patients.
Information about the proximal stomach in obese
patients with reflux is lacking. Gastric volume and
compliance are similar between obese and lean subjects.
To study the proximal stomach function and
perception in obese patients with normal or abnormal
oesophageal acid exposure, thirty-one obese patients,
with normal or abnormal oesophageal acid exposure,
underwent medical evaluation of oesophageal and
gastrointestinal symptoms by a questionnaire and
measurement of proximal stomach function and perception
by an electronic barostat and a standardized
questionnaire. Nineteen obese patients had abnormal
oesophageal acid exposure. The percentage of total
time with pH <4 is significantly related to the presence
of hiatal hernia, the oesophageal intensity-frequency
symptom score and gender, i.e. higher percentage in
men. The perception cumulative score was significantly
different between patients with normal and
abnormal oesophageal acid exposure after adjusting
for covariates (gender, body mass index, age, minimal
distending pressure, gastric tone and gastric compliance).
Gastric tone and compliance were significantly
related to the perception cumulative score.
In conclusion, patients with abnormal oesophageal
acid exposure have increased gastric perception. A
significant relation among gastric tone, gastric compliance
and upper gastrointestinal sensations was
shown
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
Fibromyalgia in patients with irritable bowel syndrome. An association with the severity of the intestinal disorder.
No full textAbstract Fibromyalgia (FM) syndrome
and irritable bowel syndrome
(IBS) are functional disorders in
which altered somatic and or visceral
perception thresholds have been
found. The aim of this study was to
evaluate the prevalence of FM in a
group of patients with IBS and the
possible association of FM with patterns
and severity of the intestinal
disorder. One hundred thirty consecutive
IBS patients were studied. The
IBS was divided into four different
patterns according to the predominant
bowel symptom and into three
levels of severity using a functional
severity index. All patients underwent
rheumatological evaluation for
number of positive tender points,
number of tender and swollen joints,
markers of inflammation, and presence
of headache and weakness.
Moreover, patients’ assessments of
diffuse pain, mood and sleep disturbance,
anxiety, and fatigue were also
measured on a visual analogue scale.
The diagnosis of FM was made
based on American College of Rheumatology
classification criteria.
Nonparametric tests were used for
statistical analysis. Fibromyalgia
was found in 20% of IBS patients.
No statistical association was found
between the presence of FM and the
type of IBS but a significant association
was found between the presence
of FM and severity of the intestinal
disorder. The presence of FM in IBS
patients seems to be associated only
with the severity of IBS. This result
confirms previous studies on the association
between the two syndrome
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
Perception of electrocutaneous stimuli in irritable bowel syndrome.
No full textBACKGROUND Irritable bowel syndrome (IBS) and fibromyalgia syndrome (FMS) are common conditions with some
AND AIM: similarities, but different perceptual responses to somatic and visceral stimuli. The purpose of this
study was to assess in a large group of IBS patients the somatic perception by transcutaneous
electrical nerve stimulation (TENS) and its relation to the level of severity and presence of FMS.
METHODS: In 99 patients grouped by the validated functional bowel disorder severity index (FBDSI) in mild,
moderate, and severe IBS and in 33 healthy controls (HC), we studied discomfort thresholds and
perception of somatic stimuli at control (hands and elbows) and active (trapezius) sites by TENS and
by using a specific questionnaire.
RESULTS: The use of TENS showed that IBS showed significant higher thresholds and lower perception
cumulative score compared to HC. The severity of IBS is significantly associated with age and mean
control site values for discomfort and borderline associated with gender in the ordinal model
constructed for the ascending series protocol. The severity of IBS is also significantly associated with
the active cumulative perception score in the long stimulus protocol. Due to limited sample size of
IBS men with FMS, analyses of discomfort thresholds and cumulative perception score by FMS were
done only for women. IBS women without FMS had significantly higher mean control site values for
discomfort and significantly lower active cumulative perception score than HC. IBS women with FMS
had significantly lower mean active site values for discomfort thresholds than IBS women without
FMS (Dunn’s test p < 0.05).
CONCLUSIONS: IBS patients showed somatic hypoalgesia to electrical stimuli. The severity of IBS and the presence
of FMS influence the perception of somatic stimuli induced by TENS
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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