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Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Gambaran Fragmentasi QRS pada Elektrokardiogram 12 Sadapan Sebagai Penanda Adanya Jaringan Parut Miokard pada Sidik Perfusi Miokard Penderita Penyakit Jantung Koroner
No full textBackground: Presence of Fragmented QRS (fQRS) on a 12-lead Electrocardiogram (ECG) was associated with various cardiac diseases. This phenomenon could represent as an electrical disruption of conduction system following myocardial damage due to coronary artery disease (CAD). We aimed to investigate the value of fQRS to detect the myocardial scar as detected by SPECT Myocardial Perfusion Imaging (MPI).
Methods: A cross-sectional study of patients with clinical diagnosis of CAD who underwent Cardiac SPECT. The fQRS defined as morphologies of QRS wave (1 R’ (fragmentation) in 2 contiguous leads, corresponding to a major coronary artery territory. Pathological Q wave, paced rhythm, typical right or left bundle branch block pattern with QRS duration of ≥ 120 ms were excluded. MPI was interpreted by visual analysis and semi-quantitative scores on 17-segment assessment according to standard nomenclature.
Results: Total of 72 patients (49 males, mean age 54.7 ± 9.8 years). fQRS was found in 46 patients (64%). The frequency of myocardial scar was significantly higher in patients with fQRS (89% vs. 15%, p<0.05). Sensitivity, specificity, positive and negative predictive value of fQRS for any of myocardial scar as detected by SPECT analysis were 91%, 81%, 89%, and 84%, respectively. For regional scar analysis, fQRS has sensitivity and specificity of 87% and 90% for anterior wall, 76% and 80% for inferior wall, 73% and 79% for lateral wall. LVEF was significantly lower in patients with fQRS (36.9±2.1 vs. 53.2±2.2, p< 0.05).
Conclusion: The fragmented QRS could serve as a novel ECG marker to detect and localize the myocardial damage in CAD patients. Regional fQRS patterns denote the presence of regional myocardial scar and are a valuable diagnostic marker of CAD with good sensitivity and specificity.Latar belakang: Adanya gambaran fragmentasi QRS (fQRS) pada Elektrokardiogram (EKG) 12 sadapan sering dikaitkan dengan berbagai penyakit jantung. Fenomena ini dapat menggambarkan gangguan pada sistem konduksi jantung setelah terjadi kerusakan miokard akibat Penyakit Jantung Koroner (PJK). Penelitian ini bertujuan untuk mengetahui nilai diagnostik fQRS dalam mendeteksi jaringan parut miokard melalui pemeriksaan Sidik Perfusi Miokard (SPM) menggunakan Single Photon Emission Computed Tomography (SPECT). Metode: Penelitian ini adalah studi potong lintang pada pasien terdiagnosa PJK yang menjalani pemeriksaan SPECT jantung. Definisi fQRS adalah berbagai morfologi gelombang QRS (durasi 1 gelombang R' pada 2 atau lebih sadapan yang berpasangan, sesuai wilayah arteri koroner mayor. Gelombang Q patologis, irama pacu jantung, pola blok cabang berkas kanan atau kiri yang tipikal dengan durasi QRS ≥ 120 ms akan dieksklusikan. Hasil SPM diinterpretasikan secara visual dan skor semikuantitatif pada penilaian 17 segmen sesuai standar. Hasil: Total 72 pasien (49 laki-laki, usia rata-rata 54,7 ± 9,8 tahun). fQRS dijumpai pada 46 pasien (64%). Frekuensi jaringan parut miokard secara signifikan lebih tinggi pada pasien dengan fQRS (89%vs. 15%, p<0,05). Sensitivitas, spesifisitas, positive dan negative predictive value fQRS untuk deteksi jaringan parut adalah 91%, 81%, 89%, dan 84%. Dari analisa jaringan parut regional, fQRS memiliki sensitivitas dan spesifisitas 87% dan 90% untuk dinding miokard anterior, 76% dan 80% untuk dinding inferior, 73% dan 79% untuk dinding lateral. Fraksi ejeksi ventrikel kiri secara signifikan lebih rendah pada pasien dengan fQRS (36,9±2,1% vs. 53,2±2,2%, p<0,05). Kesimpulan: Fragmentasi kompleks QRS dapat menjadi penanda baru pada pemeriksaan EKG untuk mendeteksi kerusakan miokard pada pasien PJK. Wilayah sadapan dengan adanya gambaran fragmentasi QRS dapat menunjukkan lokasi jaringan parut dan merupakan penanda penting untuk diagnostik PJK dengan nilai sensitivitas dan spesifisitas yang baik.Tesis Magiste
Variations on the Author
Get PDF“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
Get PDFWe 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
GENOMIC DISSECTION OF CANCER AND STEM CELL SIGNATURES IN CELLULAR TRANSFORMATION
No full textPh.DDOCTOR OF PHILOSOPH
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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