1,720,958 research outputs found
Small dense LDL with normal triglycerides in patients with coronary artery disease.
No full textATHEROSLEROSI
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
Percutaneous revascularization of femoropopliteal artery disease: PTA and PTA plus stent. Results after six years' follow-up.
No full textPURPOSE:
To compare the long-term patency after the treatment of mild-to-moderate femoropopliteal artery disease by percutaneous transluminal angioplasty (PTA) alone (PTA group) and PTA plus stenting (STENT group) in a non-randomised retrospective study.
MATERIALS AND METHODS:
Eighty-six limbs in 64 patients (mean age 67+/-8 years, 47 males and 17 females) with femoropopliteal artery disease and symptomatic for mild-to-moderate intermittent claudication (Rutherford's category 1-2) were treated by percutaneous revascularization. None of the patients had critical lower limb ischaemia. Of the 86 lesions, 63 (40 stenoses and 23 occlusions) were treated by PTA alone and 23 (12 stenoses and 11 occlusions) by PTA plus stent implantation. The success was defined as a maximal = or < 30% residual stenosis of vessel lumen diameter, as defined by biplane angiography. The angiography findings were confirmed by colour-Doppler sonography of the treated segment. A peak systolic velocity = or < 150 cm/sec in the treated segment and an improvement of the ankle/brachial index by gs; 0.15 were considered indications of haemodynamic success. Restenosis at follow-up (mean 21 months, range 1-72 months) was defined by colour-Doppler sonography as a peak systolic velocity gs; 230 cm/sec or a peak systolic velocity ratio gs; 2.5 in the treated area and a gs; 0.15 decrease in ankle/brachial index compared with post-procedure measurements.
RESULTS:
Treatment by PTA plus stenting enabled correction of residual stenosis in 15/23 limbs, relief of PTA complications in 7/23 limbs and correction of restenosis after a PTA in 1/23. In the PTA group the treatment was successful in 59/86 limbs (68%) versus 21/23 (91%) in the STENT group (chi squared value= 0,04). As a whole, major complications occurred in 5.8% of cases (n=5), 3 in the PTA group and 2 in the STENT group. The primary patency rates at 6, 12, and 24 months were 70%, 66% and 58% in the PTA group versus 74%, 67% and 46% in the STENT group (Gehan p value=0.96). The secondary patency rates at 6, 12, 24 months were 75%, 73%, 65% in the PTA group versus 84%, 76%, 64% in the STENT group (Gehan p value=0,59).
DISCUSSION AND CONCLUSIONS:
In this study, stenting and PTA for the treatment of mild-to-moderate femoropopliteal peripheral artery disease improved the primary technical success of PTA by correcting residual stenosis, elastic recoil and occlusive intimal flaps. Moreover, stenting can prevent delayed constrictive remodelling. However, stenting did not improve long-term outcomes in comparison with PTA alone given that stent implantation increases the risk of restenosis due to myointimal hyperplasia. Our findings regarding the complication rates and long-term outcome agree with those published by other authors. Colour-Doppler US monitoring enabled early detection of restenosis in the treated area and its differentiation from the development of new lesions in other area
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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