1,720,974 research outputs found
Design and Comparison of Haptic Policies for Human Guidance
No full textIn this work we compare haptic-based human guidance approaches. We considered both delivering to the user step-by-step instructions towards the goal, and a sensory augmentation policy that provides the knowledge necessary to complete the task using a self-selected strategy. The approaches were evaluated in a collaborative scenario with couples of participants carrying a bulky object under the sole guidance of haptics. Stimuli were generated by a vibrotactile belt according to three haptic policies. Results revealed that the availability of the direction to the destination was a crucial aspect for achieving best temporal performance and high usability ratings
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
Different effects of antihypertensive regimens based on fosinopril or hydrochlorothiazide with or without lipid lowering by pravastatin on progression of asymptomatic carotid atherosclerosis: principal results of PHYLLIS--a randomized double-blind trial.
No full text1. Stroke. 2004 Dec;35(12):2807-12. Epub 2004 Oct 28.
Different effects of antihypertensive regimens based on fosinopril or
hydrochlorothiazide with or without lipid lowering by pravastatin on progression
of asymptomatic carotid atherosclerosis: principal results of PHYLLIS--a
randomized double-blind trial.
Zanchetti A, Crepaldi G, Bond MG, Gallus G, Veglia F, Mancia G, Ventura A, Baggio
G, Sampieri L, Rubba P, Sperti G, Magni A; PHYLLIS Investigators.
Istituto Auxologico Italiano, Ospedale Maggiore, University of Milan, Italy.
[email protected]
BACKGROUND AND PURPOSE: The Plaque Hypertension Lipid-Lowering Italian Study
(PHYLLIS) tested whether (1) the angiotensin-converting enzyme (ACE) inhibitor
fosinopril (20 mg per day) was more effective on carotid atherosclerosis
progression than the diuretic hydrochlorothiazide (25 mg per day), (2)
pravastatin (40 mg per day) was more effective than placebo when added to either
hydrochlorothiazide or fosinopril, and (3) there were additive effects of ACE
inhibitor and lipid-lowering therapies.
METHODS: A total of 508 hypertensive, hypercholesterolemic patients with
asymptomatic carotid atherosclerosis were randomized to: (A) hydrochlorothiazide;
(B) fosinopril; (C) hydrochlorothiazide plus pravastatin; and (D) fosinopril plus
pravastatin, and followed up blindly for 2.6 years. B-Mode carotid scans were
performed yearly by certified sonographers in 13 hospitals and read centrally.
Corrections for drift were calculated from readings repeated at study end.
Primary outcome was change in mean maximum intima-media thickness of far and near
walls of common carotids and bifurcations bilaterally (CBM(max)).
RESULTS: CBM(max) significantly progressed (0.010+/-0.004 mm per year; P=0.01) in
group A (hydrochlorothiazide alone) but not in groups B, C, and D. CBM(max)
changes in groups B, C, and D were significantly different from changes in group
A. Changes in group A were concentrated at the bifurcations. "Clinic" and
"ambulatory" blood pressure reductions were not significantly different between
groups, but total and low-density lipoprotein cholesterol decreased by
approximately 1 mmol/L in groups C and D.
CONCLUSIONS: Progression of carotid atherosclerosis occurred with
hydrochlorothiazide but not with fosinopril. Progression could also be avoided by
associating pravastatin with hydrochlorothiazide.
PMID: 15514192 [PubMed - indexed for MEDLINE
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
Mineralocorticoid hypertension due to a nasal spray containing 9 alpha-fluoroprednisolone.
Full text linkThe finding of hypokalemia and of low plasma renin activity (PRA) in a hypertensive patient suggests a diagnosis of primary hypermineralocorticoidism. Medications containing compounds with mineralocorticoid-like activity (licorice, carbenexolone) may also cause the same syndrome. Recently, we carried out detailed studies on 10 patients with severe hypertension and hypokalemic alkalosis, suppressed PRA and low aldosterone levels. Plasma levels of cortisol and ACTH were suppressed in most of the cases. Measurement of deoxycorticosterone and corticosterone (and in some patient of 18-hydroxydeoxycorticosterone and 18-hydroxycorticosterone) was not significantly higher than normal. Therapeutic trials of dexamethasone and aminoglutethimide were ineffective. In contrast, spironolactone and amiloride treatment resulted in substantial but incomplete amelioration of both hypertension and hypokalemia. All of the patients share a common history of chronic rhinitis and habitual use of large doses of nasal spray containing 9 alpha-fluoroprednisolone and vasoconstrictor agents. Withdrawal resulted in a complete remission of hypokalemia in one to two weeks in all patients. The hypertension and depressed levels of PRA, aldosterone and cortisol took longer to return to normal, varying from case to case; in all but one patient, the values returned to normal within two months. This report reveals another cause of factitious mineralocorticoid excess which may be considered in the differential diagnosis of hypokalemic hypertensive syndromes
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