1,720,963 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
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
The correlation of selenium and copper plasma levels with common cardiovascoular risk factors in type 2 diabetes mellitus patients
No full textAccording to experimental and human studies, selenium and copper may have a key role in the pathogenesis of diabetes mellitus contributing to the insulin resistance and development of diabetic complications. Copper is an essential but highly-toxic trace metal that is closely related to increased pro-oxidant stress and defective antioxidant defenses, and to progressive damage to the blood vessels, heart, kidneys, retina and nerves. In non-diabetic subjects elevated copper levels have been related to coronary artery disease (CAD) and left ventricular dysfunction. Selenium is an essential trace element mainly involved in the complex system of defense against oxidative stress, thyroid function and immune functions. Studies have, also, showed a potential association between serum selemium levels and cardiovascular risk. The existing literature data regarding the relationship between serum selenium levels and type 2 diabetes (T2D) are controversial. Some studies showed that high serum selenium levels were positively associated with the prevalence of diabetes while other studies hypothesized that high levels of selenium might prevent diabetes. Therefore the aim of the present study was to investigate whether selenium and copper levels differ between T2D subjects with and without CAD.A total of 200 subjects with type 2 diabetes (100 with CAD and 100 without CAD), consecutively selected from the diabetes outpatient clinic of our hospital were enrolled into the study. A detailed medical history and a physical examination were obtained by all the participants. Statistical analysis was performed using programs available in the SPSS statistical package (SPSS 19.0, Chicago, USA).Serum selenium levels did not differ between diabetic subjects with and without CAD (102.40 ± 31.10 vs. 108.86 ± 33.88 microg/L, P=0.16). In diabetic subjects with CAD multivariate linear regression analysis demonstrated significant independent associations between selenium and sex (beta=0.21, P=0.03) and glucose levels (beta=0.25, P=0.008). In diabetic subjects without CAD multivariate linear regression analysis demonstrated significant independent associations between selenium and peripheral artery disease (beta=0.16, P=0.05) and glucose levels (beta=-0.09, P=0.05). In accordance, copper levels did not differ between diabetic subjects with and without CAD (115.60 ± 33.68 vs. 117.58 ± 33.79 microg/L, P=0.67). In diabetic subjects with CAD multivariate linear regression analysis demonstrated significant independent associations between copper and sex (beta=-0.22, P=0.05), body mass index (beta=0.25, P=0.01) and chronic kidney disease (beta=-0.22, P=0.01). In diabetic subjects without CAD multivariate linear regression analysis demonstrated significant independent associations between copper and hematocrit (beta=-0.19, P=0.05). In conclusion, serum selenium and copper levels did not differ between diabetic subjects with and without CAD. In diabetic subjects with CAD, the only determinants of serum selenium levels were sex and glucose levels while for copper was sex, body mass index and chronic kidney disease. In diabetic subjects without CAD the only determinants of serum selenium levels were peripheral artery disease and glucose levels while for copper was only hematocrit.Τα υψηλά επίπεδα του χαλκού σε μη διαβητικά άτομα έχουν συσχετισθεί με την παρουσία στεφανιαίας νόσου και δυσλειτουργίας της αριστεράς κοιλίας. Το σελήνιο είναι ένα ιχνοστοιχείο που μετέχει σε ποικίλα συστήματα όπως είναι η άμυνα έναντι της οξειδωτικής καταπόνησης, η λειτουργία του θυρεοειδούς αδένα και του ανοσοποιητικού συστήματος. Οι υπάρχουσες μελέτες έχουν δείξει την ύπαρξη συσχέτισης μεταξύ του σεληνίου και του καρδιαγγειακού κινδύνου. Τα υπάρχοντα βιβλιογραφικά δεδομένα σχετικά με το ρόλο του σεληνίου στο σακχαρώδη διαβήτη τύπου 2 (ΣΔτ2) παραμένουν αντικρουόμενα. Για τους παραπάνω λόγους σχεδιάσθηκε η παρούσα διδακτορική διατριβή προκειμένου να διερευνηθεί εάν τα επίπεδα σεληνίου και χαλκού πλάσματος διαφέρουν μεταξύ ατόμων με ΣΔτ2 ανάλογα με την παρουσία ή όχι στεφανιαίας νόσου (ΣΝ). Μελετήθηκαν 100 άτομα με ΣΔτ2 και ΣΝ και 100 άτομα με ΣΔτ2 χωρίς ΣΝ που επιλέχθηκαν τυχαία από το σύνολο των διαβητικών ατόμων που παρακολουθούνται στο Διαβητολογικό Κέντρο της Γ’ Παθολογικής Κλινικής του Γ.Ν.Νίκαιας. Όλοι υποβλήθηκαν σε πλήρη αντικειμενική εξέταση και εργαστηριακό έλεγχο.Τα επίπεδα σεληνίου του πλάσματος δε διέφεραν μεταξύ διαβητικών ατόμων με και χωρίς στεφανιαία νόσο (102,40 ± 31,10 έναντι 108,86 ± 33,88 microg/L,αντίστοιχα, P=0,16). Στα άτομα με ΣΔτ2 και ΣΝ η ανάλυση πολλαπλής γραμμικής εξάρτησης έδειξε ότι το φύλο (beta=0,21, P=0,03) και τα επίπεδα γλυκόζης του πλάσματος (beta=0,25, P=0,008) σχετίζονταν σημαντικά και ανεξάρτητα με τα επίπεδα σεληνίου του πλάσματος. Στα άτομα με ΣΔτ2 χωρίς ΣΝ η ανάλυση πολλαπλής γραμμικής εξάρτησης έδειξε ότι η παρουσία περιφερικής αγγειακής νόσου (beta=0,16, P=0,05) και τα επίπεδα γλυκόζης του πλάσματος (beta=-0,09, P=0,05) σχετίζονταν με τα επίπεδα σεληνίου του πλάσματος.Όμοια, τα επίπεδα χαλκού του πλάσματος δε διέφεραν μεταξύ διαβητικών ατόμων με και χωρίς ΣΝ (115,60 ± 33,68 έναντι 117,58 ± 33,79 microg/L, αντίστοιχα, P=0,67). Στα άτομα με ΣΔτ2 και ΣΝ η ανάλυση πολλαπλής γραμμικής εξάρτησης έδειξε ότι το φύλο (beta=-0,22, P=0,05), το BMI (beta=0,25, P=0,01) και η παρουσία χρόνιας νεφρικής νόσου (beta=-0,22, P=0,01) σχετίζονταν σημαντικά και ανεξάρτητα με τα επίπεδα χαλκού του πλάσματος. Στα άτομα με ΣΔτ2 χωρίς ΣΝ η ανάλυση πολλαπλής γραμμικής εξάρτησης έδειξε ότι ο αιματοκρίτης (P=0,05) σχετίζονταν με τα επίπεδα χαλκού του πλάσματος.Συμπερασματικά, τα αποτελέσματα της παρούσας διδακτορικής διατριβής έδειξαν ότι τα επίπεδα σεληνίου και χαλκού του πλάσματος δεν διέφεραν μεταξύ των ατόμων με ΣΔτ2 με και χωρίς ΣΝ. Στα διαβητικά άτομα με ΣΝ τα επίπεδα σεληνίου του πλάσματος σχετίζονταν με το φύλο και τα επίπεδα γλυκόζης πλάσματος ενώ τα επίπεδα χαλκού του πλάσματος σχετίζονταν με το φύλο, το δείκτη μάζας σώματος και την παρουσία χρόνιας νεφρικής νόσου. Στα διαβητικά άτομα χωρίς στεφανιαία νόσο τα επίπεδα σεληνίου του πλάσματος σχετίζονταν με την παρουσία περιφερικής αρτηριακής νόσου και τα επίπεδα γλυκόζης πλάσματος, ενώ τα επίπεδα χαλκού του πλάσματος σχετίζονταν μόνο με τον αιματοκρίτη
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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