1,721,067 research outputs found
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
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
Investigation of the relationship between serum and saliva calprotectin levels and disease activity parameters evaluated clinically and by laboratory parameters in patients with rheumatoid arthritis
No full textRomatoid artrit hastalığının tanısında yol gösterecek yeni biyobelirteçler üzerinde çalışılmakta ve hastalığın erken teşhisi ve tedavisi hedeflenmektedir. Periodontit ve RA'nın benzer patogenetik mekanizmaları gösterilmiştir. Periodontal hastalığı olan RA'lı hastaların hastalık aktiviteleri daha kötü seyretmektedir. Önceki çalışmalar kalprotektinin RA tanısı ve prognozu için değerli bir biyobelirteç olabileceğini göstermektedir. Periodontiti olan hastalarda kalprotektinle hastalık aktivitesi arasındaki ilişki bilinmektedir. Ayrıca kronik periodontiti olan hastalarda tükürük kalprotektin düzeyinin de yüksek olduğu birkaç çalışmada gösterilmiştir. RA tanılı hastalarda tükürükteki kalprotektin düzeyleriyle hastalık aktivitesinin ilişkisini gösteren bir çalışma şu ana dek literatürde bulunmamaktadır. Bu çalışmada amacımız RA tanılı hastalarda serum ve tükürük kalprotektin düzeyleriyle hastalık aktivitesini değerlendirmek, ikincil olarak da bu hastalarda periodontiti değerlendirerek serum ve tükürük kalprotektin düzeylerinin periodontitle ilişkisi olup olmadığını ortaya koymaktır. Medipol Üniversitesi Tıp Fakültesi Romatoloji Bilim Dalı polikliniğine başvuran, 2010 ACR/EULAR sınıflandırma kriterlerine göre RA tanısı almış 76 hasta (K/E: 59/17), hasta kontrol grubu olarak 2016 ACR-EULAR sınıflandırma kriterlerine göre Sjögren sendromu tanısı almış 24 hasta (K/E: 24/0) ve sağlıklı kontrol grubu olarak 40 yetişkin (K/E: 25/15) çalışmaya dahil edildi. Olguların demografik, klinik ve laboratuvar verileri hasta takip formuna kaydedildi ve eş zamanlı olarak kalprotektin için serum ve tükürük örneği alındıktan sonra periodontit muayenesi yapıldı. Gruplar arası analizler Student-T testi, Mann-Whitney U testi; hasta ve doktor kökenli ölçekler arası korelasyonlar Spearman korelasyon testiyle değerlendirildi. RA'lı hastalarda serum kalprotektin değeri, yüksek hastalık aktivitesi olan grupta, düşük hastalık aktivitesi olan gruba göre daha yüksek saptandı [YHA ve DHA: 11,5 (0,78-38,23); 8,3 (1,6-24,4) (p:0,02)]. Ortalama serum kalprotektin değerleri RA grubunda diğer iki gruba göre daha yüksek saptandı ve RA grubuyla SS grubu arasında istatistiksel fark saptanırken, RA grubu ile sağlıklı kontrol grubu arasında istatistiksel fark saptanmadı [RA, SS ve SK sırasıyla: 13,6 (9,8); 8,1 (7,5) ve 10,9 (6,02) (p:0,01)]. RA tanılı hastalarda ortanca tükürük kalprotektin düzeyleri, periodontiti olan hastalarda periodontiti olmayanlara göre daha yüksek saptandı [Periodontit evre I ve Periodontit evre II-IV sırasıyla: 27,3 (1,6-40,74); 31,7 (0,64-75,85) (p:0,04)]. Romatoid artrit hasta grubunda serum kalprotektin değerleri sağlıklı ve hasta kontrol grubuna göre yüksek saptanmış ve hastalık aktivitesiyle korele bulunmuştur. Buna karşılık romatoid artritli hastalarda tükürük kalprotektin değerleri sağlıklı ve hasta kontrol grubuna göre düşük saptanmıştır. Romatoid artritli hastalarda periodontal enflamasyon tükürük kalprotektin değerleri ile korele çıkarken, diğer iki grupta böyle bir ilişki saptanmamıştır. Bu çalışma diğer çalışmalara benzer şekilde serum kalprotektin düzeylerinin hastalık aktivite belirteçleriyle pozitif yönde korele olduğunu göstermiştir.New biomarkers that will guide the diagnosis of rheumatoid arthritis are being studied and early diagnosis and treatment of the disease is aimed. Similar pathogenetic mechanisms of periodontitis and RA have been demonstrated. Disease activities of patients with RA who have periodontal disease tend to be worse. Previous studies suggest that calprotectin may be a valuable biomarker for the diagnosis and prognosis of RA. The relationship between calprotectin and disease activity in patients with periodontitis is known. In addition, several studies have shown that the salivary calprotectin level is high in patients with chronic periodontitis. A study showing the relationship between salivary calprotectin levels and disease activity in patients with RA has not been found in the literature so far. In this study, our aim is to evaluate the disease activity with serum and salivary calprotectin levels in patients with RA, and secondly, to evaluate periodontitis in these patients and to reveal whether serum and salivary calprotectin levels are related to periodontitis. 76 patients diagnosed with RA (Female/Male: 59/17) according to the 2010 ACR/EULAR classification criteria, 24 patients diagnosed with SS (F/M: 24/0) according to the 2016 ACR-EULAR classification criteria as the patient control group, and 40 healthy adults (F/M: 24/0) as healthy control group, who applied to the Medipol University Faculty of Medicine Rheumatology Department outpatient clinic, were included in the study. Demographic, clinical and laboratory data of the cases were recorded in the patient follow-up form, and periodontitis examination was performed after taking serum and saliva samples to measure the calprotectin levels simultaneously. Intergroup analyzes were evaluated with Student-T test and Mann-Whitney U test. The correlations between patient and physician-derived scales were evaluated with the Spearman correlation test. In patients with RA, serum calprotectin value was found to be higher in the group with high disease activity than in the group with low disease activity [HDA and LDA: 11.5 (0.78-38.23); 8.3 (1.6-24.4) (p:0.02)]. Mean serum calprotectin values were found to be higher in the RA group than in the other two groups, and there was a statistical difference between the RA group and the SS group, but no statistical difference was found between the RA group and the healthy control group [RA, SS, and HC, respectively: 13.6 (9.8); 8.1 (7.5) and 10.9 (6.02) (p:0.01)]. Median salivary calprotectin levels in patients with RA were found to be higher in patients with periodontitis than in patients without periodontitis [Periodontitis stage I and Periodontitis stage II-IV, respectively: 27.3 (1.6-40.74); 31.7 (0.64-75.85) (p:0.04)]. Serum calprotectin levels were found to be higher in the rheumatoid arthritis patient group than in the healthy and patient control group, and were correlated with disease activity. On the other hand, salivary calprotectin values in patients with rheumatoid arthritis were found to be lower than those of the healthy and patient control group. While periodontal inflammation was correlated with salivary calprotectin values in patients with rheumatoid arthritis, no such relationship was found in the other two groups. Similar to other studies, this study showed that serum calprotectin levels were positively correlated with disease activity markers
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
Musculo-Skeletal and Vascular Involvement in Behcet's Disease
No full textAs a complex vasculitis of unknown etiology, both innate and adaptive immune systems are activated in Behcet's disease (BID), together with neutrophilic and lympho-histiocytic inflammation. With some features also resembling spondyloarthropathies, arthritis is one of the most frequent manifestations of BID and its prevalence ranges from 40-70%. The most frequently affected joint is knee. Patients generally present with non-erosive, recurrent, asymmetric mono or oligoarthritis. Enthesitis, spondylitis and sacroiilitis are seen less frequently. Non-steroidal anti-inflammatory drugs and intra-articular corticosteroids are the first choice of treatment. Although controlled-trials are lacking, most clinicians also use sulphasalazine and methotrexate in refractory cases. BID, with a prevalence of 25-30%, also involves vessels of all sizes, both arterial and venous. It most commonly affects young males as an important cause of mortality. Endothelial dysfunction is thought to be the major etiopathogenetic factor of vessel involvement. As the disease course continues with remission and relapses and disease activity abating in older ages, controlling inflammation and the prevention of complications at the early phases of the disease is the main aim of treatment. For major vessel involvement cyclophosphamide and high-dose corticosteroids are used, azathiopurine is recommended for small-vessel disease. (Turkderm 2009; 43 Suppl 2: 54-60
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
- …
