1,720,997 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
Rektum kanseri tedavisinde karar ağaci ve uzman görüşü kullanan bir klinik karar destek sistemi
No full textTüm dünyada önemli bir sağlık problemi olan kolorektal kanserin tedavisinde hastalığa ilişkin çok sayıda kriter bulunduğundan, doktorun hasta için en uygun tedaviyi seçmesi oldukça önem taşımaktadır. Kolon ve rektumun kanseri kolorektal kanser olarak adlandırılırken, bu çalışmada sadece rektum kısmı ile ilgilenilmiştir. Rektum kanseri hastaları için en uygun tedavi yönteminin belirlenmesi amacıyla doktorun kararlarına destek olacak bir sistemin oluşturulması amaçlanmıştır. Yöneylem araştırmasında kullanılan çok kriterli karar verme tekniklerinden biri olan analitik hiyerarşi süreci yöntemi ve karar ağaçları yöntemlerinin birleştirilmesi ile bir karar modeli geliştirilmiştir. Sistemde analitik hiyerarşi süreci yöntemi ile elde edilen öncelikler kullanılarak en yüksek önceliğe sahip kriterden değerlendirmeye başlanarak hastanın tedavi kararı verilebilmektedir. Karar ağacı yardımıyla oluşturulan model ise daha önceki verileri ve uzman görüşlerini kullanarak tedavi yöntemi önerisinde bulunmakta ve önerilen tedaviye ilişkin literatür taramasını ve eldeki veri tabanından elde edilen sağkalımları göstermektedir. Böylece doktor belirli bir hasta için birden çok tedavi önerisi ile karşılaştığında sağkalım sürelerini göz önünde bulundurarak en uygun tedavi kararını verebilecektir. Analitik hiyerarşi süreci yöntemi ve karar ağaçları yöntemlerinin birleştirilmesi ile oluşturulan karar modelinin gerçek hasta verileri ile yapılan uygulaması internet tabanlı bir uygulama ile kullanıcıya sunulmuştur. Klinik karar destek sisteminin tutarlılığı uzmanlar tarafından değerlendirilmiştir. Bu çalışma uzman bilgisinin yanında, hasta verilerini ve hastalık kriterlerini de kullanarak adım adım karar verdiğinden, sistemin doktorun karar verme sürecine destek olabilmesi beklenmektedir. Since there are several criteria regarding the disease in treatment of colorectal cancer which is one of the important health problems in world; choosing the most appropriate treatment option concerning a patient is of great importance for the physician. While cancer of the colon and rectum is also called colorectal cancer, in the present study it was focused on the rectal part. It was aimed to create a system to support the decisions of the physician in order to determine the most appropriate treatment method for rectum cancer patients. A decision model was developed by combining the analytic hierarchy process method which is one of the multi criteria decision making techniques in operations research, and decision tree method. The treatment decision for a patient may be made with the use of priorities that obtained from analytic hierarchy process method by investigating criteria from the most prior to the least. The model that built by the use of a decision tree used previous patient data and expert opinions to suggest a treatment method, and showed survivals that obtained from patient data regarding the suggested treatment and literature review. Thus, the physician may make decision by taking survivals into account when there are various treatment suggestions for a particular patient. The real patient data application of decision model that built by combining analytic hierarchy process method and decision tree method was presented to the user by using a web-based application. The consistency of the clinical decision support system was evaluated by the experts. Due to the fact that this study supports a stepwise decision making process using patient data and disease criteria as well as expert knowledge, it is expected that the system may support the decision making process of the physician
Plasma Levels of Antioxidant Vitamins in Patients with Acromegaly: A Case-Control Study
No full textOzdemir, Nilufer/0000-0002-0719-988X; SUNER, ASLI/0000-0002-6872-9901OBJECTIVE: the aim of this study was to compare antioxidant vitamin C and vitamin E levels in the non-acromegaly control group and in patients with acromegaly with and without remission. MATERIAL AND METHODS: in this study, 100 cases, acromegaly patients of 57% (n=57, 29F, 28M, mean ages of 49.5 +/- 12.1) and control subjects of 43% (n=43, 29F, 14M, mean ages of 49.6 +/- 9.2). Acromegaly patients were classified into two groups; active acromegaly (AA; n=33) and controlled acromegaly (CA; n=24). RESULTS: Vitamin C levels were significantly lower in the acromegaly group [7.6 (4.7) mg/L, as median (IQR)] when compared to the control group [12.2 (5.5) mg/L, as median (IQR)] (p <0.001). Vitamin E levels didn't show a significant difference between the acromegaly and the control groups (14.2 +/- 3.6 vs. 14.8 +/- 3.7, as mean +/- SD, respectively, p = 0.439). Correlation analysis showed that vitamin C levels were not significantly associated with clinical, anthropometric and laboratory parameters in the acromegaly group. Vitamin E levels were significantly associated with the total cholesterol, triglyceride, LDL-C, HDL-C, APO A1, APO B both in the acromegaly and the control groups. CONCLUSION: This study is the first one to investigate the relationship between the levels of vitamin C & E and anthropometric & metabolic parameters in acromegaly patients and control group. in our study, vitamin C level was significantly lower in the acromegaly group compared to the level in the control group. There was no significant difference in vitamin E levels between the acromegaly and control group
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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