186,324 research outputs found
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Nonpalpable breast cancer: Percutaneous diagnosis with 11- and 8-gauge stereotactic vacuum-assisted biopsy devices
No full textPURPOSE: To compare the accuracy of diagnosis of invasive breast cancer with 11- and 8-gauge stereotactic vacuum-assisted biopsy (SVAB) devices and to correlate lesion diameter and accuracy of breast cancer diagnosis at SVAB. MATERIALS AND METHODS; During a 22-month period, 489 SVAB procedures were performed with an 11-gauge probe and 305 with an 8-gauge probe. SVAB and surgical pathologic results of 104 breast carcinomas were reviewed and correlated with lesion size, number of specimens obtained, and type of SVAB probe used. RESULTS: Four of 38 ductal carcinoma in situ (DCIS) lesions diagnosed with 11-gauge SVAB demonstrated invasion at surgery, whereas one of 23 DCIS lesions diagnosed with 8-gauge SVAB demonstrated invasion at surgery (P = .6). A mean of 12 specimens per lesion were obtained in each group. In lesions 30 mm or larger, the underestimation rate for DCIS was 43% (three of seven) with 11-gauge SVAB and 17% (one of six) with 8-gauge SVAB (P = .6). Overall, the rate of underestimation for DCIS was significantly higher in lesions 30 mm or larger (four of 13) than in smaller lesions (one of 48, P = .006). CONCLUSION: This study demonstrated no difference in breast cancer diagnosis with the 8- and 11 -gauge SVAB systems, but the accuracy of breast cancer diagnosis was greater in lesions smaller than 30 mm than in larger lesions
Stereotactic vacuum-assisted biopsy (SVAB) of nonpalpable breast microcalcifications: advantage of clip placement (prospective study)
No full textPurpose: The purposes were to evaluate the feasibility of an add-on stereotactic vacuum-assisted breast biopsy (SVAB) on lateral lying position, to predict which patients requiring clips and to compare two kinds of clips.
Materials and Methods: 177 microcalcifications from 162 women (mean age, 62 ± 11.2; range 34 - 85 years) performed breast biopsy with an 11-gauge needle. One kind of clip, Gel Mark® Ultra or MicroMarkTM II, was deployed. Craniocaudal (CC) and mediolateral (ML) mammograms were obtained before and after biopsy. All lesions were classified into three mono-focal groups according to their diameter of 20 mm (group 3) and one multi-focal group (group 4). Results were considered statistically significant if the P < 0.05.
Results: Histology showed benign in 135 (76.3 %), malignancy in 39 (22.0 %) and atypical ductal hyperplasia (ADH) in 3 (1.7 %) biopsies. The sensitivity, specificity, accuracy were 100 %, 92.9 % and 97.1 % respectively. In group 1 (n = 26), 23 lesions (88.5 %) and in group 2 (n = 22), 18 lesions (68.2 %) were completely removed, while in group 3 (n = 18), no lesion was completely removed. 57/123 (46.3 %) lesions were multi-focal microcalcifictions (group 4). 75 clips (69.4 %) were located within 10 mm distance from the biopsy site on both (CC, ML) projections. 33 (30.5 %) clips were dislocated on at least one projection and 84.8 % clips were dislocated only on CC projection. There was no significant difference between the two kinds of clips. Four patients developed hematomas. No inflammation and vasovagal reaction had occurred.
Conclusions: An add-on SVAB is an effective diagnostic procedure for nonpalpable breast microcalcifications. Microcalcifications smaller than 20 mm and all the multi-focal microcalcifications are useful indicators to deploy clips. The major influent factor of clip displacement is the "accordion effect". There is no significant difference of the two kinds of clips as to accurate localization
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
Dr. Edward P. Wimberly, ITC, July 2011
No full textThis video is a conversation with Dr. Edward P. Wimberly. Dr. Wimberly talks about his book, "No Shame in Wesley's Gospel: A Twenty-First Century Pastoral Gospel". Brad Ost, AUC Woodruff Library, is the interviewer
Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots
No full text<p>Supplementary Data for:</p>
<p>"Cryogenic hyperabrupt strontium titanate varactors for sensitive reflectometry of quantum dots"</p>
<p>Rafael S. Eggli, Simon Svab,Taras Patlatiuk, Dominique Trüssel, Miguel J. Carballido, Pierre Chevalier Kwon, Simon Geyer, Ang Li,<br>
Erik P. A. M. Bakkers, Andreas V. Kuhlmann, and Dominik M. Zumbühl</p>
Author Rights and Scholarly Publishing
No full textOriginally posted at
http://blog.library.gsu.edu/2014/10/24/author-rights-and-scholarly-publishing/</p
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