1,720,980 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
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
PCN113 - Cost effectiveness of Cetuximab and Panitumumab for first-line RAS WT metastatic colorecal cancer
No full textObjectivesLiver resection is a treatment offering long-term survival in patients with metastatic colorectal cancer (mCRC). However, the majority of such patients are not suitable for curative hepatectomy due to widespread nature of their disease. Chemotherapy can significantly downsize primarily unresectable metastases and increase the possibility of resection in mCRC patients. It has been shown that chemotherapy combined with biological agents, cetuximab (CET) and panitumumab (PAN), is clinically beneficial for treating RAS WT tumors (tumors without mutations in KRAS/NRAS exons 2/3/4). This study is aimed: (1) to estimate the cost-effectiveness of combination chemotherapies with CET and PAN for people with previously untreated RAS WT mCRC, not eligible for liver surgery; and (2) to assess CET and PAN against the National Institute for Health and Care Excellence (NICE) end-of-life (EoL) criteria, to inform a Health Technology Assessment for NICE.MethodsWe proposed an economic model estimating costs and benefits of mCRC treatments over patient lifetime horizon. In our base case, we estimated incremental cost-effectiveness ratio (ICER) for CET+FOLFOX versus FOLFOX, PAN+FOLFOX versus FOLFOX, and CET+FOLFIRI versus FOLFIRI. Probabilistic and univariate deterministic sensitivity analyses were performed to estimate uncertainty in model predictions. The cost-utility analysis was based on three randomised controlled trials and undertaken from the NHS and personal social service perspective. Estimated costs and quality-adjusted life years were discounted at 3.5% per annum.ResultsCET and PAN are not cost-effective at willingness-to-pay thresholds of £30,000. Moreover, ICERs remain above £30,000 even under zero prices for CET and PAN. Based on the available evidence, neither CET nor PAN fulfils the NICE EoL criteria to be considered as life-extending EoL treatments.ConclusionsAlthough CET and PAN appear to be clinically beneficial for RAS WT patients, they are likely to represent poor value for money when judged by cost-effectiveness criteria used in the UK
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
Modelling the Cost-Effectiveness of Diagnostic Tests
Full text linkThis is the author accepted manuscript. The final version is available from Springer via the DOI in this recordData availability:
There are no data included in this article that are not in the public domain. The simulated example shown in Fig. 2 can be replicated by drawing (X1,X2)
from a bivariate normal distribution with mean (0,0)
and covariance matrix (10.40.41)
, then simulating Z1∼N(X1,0.2),Z2∼N(X1,0.2)
and Z3∼N(X2,0.2)
, and finally simulating the test results as Y1=I(Z1>0.6)
, Y2=I(Z2>0)
and Y3=I(Z3>0.5)
. The true disease status is given by I(X1+X2>1)
.Diagnostic tests are used to determine whether a disease or condition is present or absent in a patient, who will typically be suspected of having the disease or condition due to symptoms or clinical signs. Economic evaluations of diagnostic tests (e.g. cost-effectiveness analyses) can be used to determine whether a test produces sufficient benefit to justify its cost. Evidence on the benefits conferred by a test is often restricted to its accuracy, which means mathematical models are required to estimate the impact of a test on outcomes that matter to patients and health payers. It is important to realise the case for introducing a new test may not be restricted to its accuracy, but extend to factors such as time to diagnosis and acceptability for patients. These and other considerations may mean the common modelling approach, the decision tree, is inappropriate for underpinning an economic evaluation. There are no consensus guidelines on how economic evaluations of diagnostic tests should be conducted—this article attempts to explore the common challenges encountered in economic evaluations, suggests solutions to those challenges, and identifies some areas where further methodological work may be necessary
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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