1,721,440 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
Comparison of superficial masses cytological characteristics and histopathologic validation by fine needle aspiration method
No full text細胞學診斷最早是在1960年代開始應用在獸醫方面，現今對於臨床醫師來說已被認為是一項不可或缺的診斷工具。它提供了一個快速、低侵入性且經濟的方式來獲取初步的診斷結果。但是還是有些臨床醫師對此診斷準確度抱持著存疑的態度，為了證明細胞學檢驗在臨床上可提供的診斷價值，我們在此研究中蒐集了157個淺層體表腫塊細胞學診斷案例，並和之後的組織病理學結果作比較，期望能給予一個診斷準確度的評估。
在本研究中，我們詳細描述不同型態之細胞在快速染色下的細胞學特徵，並描繪評斷細胞惡性的準則，最終評估細胞學診斷和組織病理結果之一致性。其中有40.76%的案例是完全準確的；38.85%的病例是部份準確或是無法完全確診的結果；38.85%的病例則是完全不準確。至於在評估腫塊細胞來源之分類上，細胞學診斷之準確度可達72.61%。在診斷腫瘤方面，細胞學診斷可提供70.4%的敏感性，73.3%的特異性，陽性預測值為96.2%，陰性預測值為20.8%。總體細胞學準確率為70.7%。
造成細胞學檢驗和組織病理學結果有差異之潛在因子，在此也將一併說明及討論，期望能提供往後診斷方面上的改進。當擁有良好的訓練及經驗後，許多常見的病灶都可經由此方法來確認。Cytology, first introduced to veterinary medicine in the 1960s, is regarded as an indispensable diagnostic tool for clinician. It provides a rapid, minimally invasive, and inexpensive means of obtaining a preliminary diagnosis. However, its accuracy in making correct diagnosis has always been doubted by many veterinarian. In order to provide evidence of its usefulness in providing fast diagnosis in clinic, we analyzed 157 cytologic cases results and compare with the later histopathological results.
In this study, we interpret the characteristic of different cell types by quick staining methods, describe the cytologic criteria for malignancy potential, and evaluate the concordance between cytological diagnoses and histopathological results. There are 40.76% cases exhibit complete agreement, 20.38% cases reveal partial agreement or inconclusive results, and 38.85% cases were disagreement. Concordance of identified cell origin between cytology and histopathology was 72.61%. For diagnosing neoplasia, cytologic evaluation had a sensitivity of 70.4%, and a specificity of 73.3%. Positive predictive value was 96.2% and negative predictive value was 20.8%. The overall agreement between cytologic and histopathologic examination was 70.7%.
The potential factors behind the set of two discordant results are postulate and discussed in hoping to provide the improvement of this invaluable tool. With proper training and experiences, most of the common lesions are readily recognizable口試委員會審定書……………………………………………………i
誌謝……………………………………………………………………ii
中文摘要…………………………………………………………………v
Abstract………………………………………………………………vi
Chapter I : Introduction……………………………………………1
Chapter II : Literatures Reviews…………………………………4
Chapter III : Objectives……………………………………………9
Chapter IV : Materials and Methods……………………………10
(1) Criteria for case selection…………………………………10
(2) Procedure of sample collection……………………………10
(3) Categories of cytologic and histopathologic diagnoses...11
(4) Categories of comparison results…………………………12
(5) Statistical analysis…………………………………………13
Chapter V : Interpretation of Cell Types……………………14
(1) Epithelial cells…………………………………………14
(2) Mesenchymal cells………………………………………15
(3) Round cells………………………………………………15
(4) Others………………………………………………………17
Chapter VI : Cytologic Criteria for Malignancy……………18
Chapter VII : Results………………………………………………21
(1) Basic data of the patients……………………………21
(2) The accuracy of cytologic category…………………22
(3) Comparison results in each cytologic category…23
(4) The causes of partial agreement in comparison results.................................................25
(5) Comparisons of tumor location ……………………………26
(6) Correlation between tumors and locations in dogs……27
(7) Sensitivity and specificity of cytology in neoplasm diagnosis……………29
Chapter VIII : Discussion…………………………………………30
References……………………………………………………………6
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
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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