1,721,044 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 liver X receptor pathway in luteal regression
No full textKolesterol steroid hormonları, safra asidi ve vitamin D'nin öncüsü olan nötral bir lipittir. Liver X reseptörleri kolesterolün reverz taşımında (efluks) önemli rol üstlenir ve makrofaj gibi periferal hücrelerden kolesterolün dışarı atılmasını sağlar. LXR'nin karaciğer ve diğer organlardaki rolü açıklanmış olsada, LXR' nin üreme organlarındaki rolü moleküler düzeyde tam olarak bilinmemektedir. Korpus luteumda (KL) gebelik gerçekleşmemişse progesteron üretimi durur, hücre bütünlüğü kaybolur, doku kitlesi azalarak apoptozis ve otofaji yolakları vasıtasıyla regresyon başlar. Regresyon süresince meydana gelen progesteron azalışında kolesterolün luteal dokudan efluksunun rolü olup olmadığı netlik kazanmamıştır. Bu çalışmanın amacı, kolesterolün reverz olarak tranpsortunun luteal regresyona katkısının araştırılmasıdır. Bu amaç için iki araştırma yapıldı: 1) Birinci araştırmada, siklik (S12 ve S16-doğal luteolizis) ve gebelik (G12, G16 ve G22) gruplarından, 2) İkinci araştırmada siklusun 12. günde luteolizis PGF2α enjeksiyonu ile uyarılıp 1 saat (PG1, n=4), 4 saat (PG4, n=4), 16 saat (PG16, n=4) ve kontrol (n=4) olmak üzere KL doku örnekleri toplandı. LXR yolağı (LXRα, LXRβ, ABCA1, ABCG1, APOE ve APOA1), steroidogenik progesteron sentez yolağı (StAR, 3βHSD ve P450scc) ile kolesterol alım reseptörlerinin (SRBI ve LDLR) gen ifadeleri mRNA düzeyinde RT-qPZ ve LXR yolağının genlerinin protein seviyesi western blot ile araştırıldı. Ayrıca, in-situ hibridizasyon ile StAR (S16 vs G16), SR-BI (S12 vs PG1 vs PG4 vs PG16), LXRα, LXRβ, ABCA1 genlerinin mRNA lokalizasyonları saptandı. Doğal luteolizisde LXRα ve ABCA1 mRNA ekspresyonu değişmezken (P>0,05), LXRβ, ABCG1, APOE ve ApoA-1 mRNA ekspresyon seviyesi S16'da S12'ye göre artmıştır (P<0,05). Ancak, StAR, 3βHSD, P450scc LDLR ve SR-BI mRNA ekspresyonları azalmıştır (P<0,05). PGF2α indüklenmiş luteolizis PG1'de S12'ye göre LXRα, ABCA1 ve 3βHSD mRNA ekspresyonu azalırken (P<0,05), LXRβ ekspresyonu artmıştır (P<0,05). Ancak, StAR, P450scc, LDRL ve SR-BI mRNA ekspresyonları değişmemiştir (P>0,05). PG4'de S12'ye göre LXRα, LXRβ, APOE, ApoA-I, LDLR, SR-BI, StAR, P450scc ve 3βHSD mRNA ekspresyonu azalırken (P<0,05), ABCA1 ve ABCG1 mRNA ekspresyonu değişmemiştir (P>0,05). PG16'da S12'ye göre StAR, P450scc, 3βHSD, LDLR, SR-BI ve ApoA-I azalmış (P<0,05), ABCG1 ekspresyonu artmıştır (P<0,05). Doğal luteolizis S16'da S12'ye göre LXRβ protein seviyesi artarken (P<0,05), diğer genlerin protein seviyesi doğal ve indüklenmiş luteolizis gruplarında değişmemiştir (P>0,05). In-situ hibridizasyonda StAR mRNA'sının ifadesi G16'da S16'ya göre daha fazladır (P<0,05). SR-BI mRNA'sı PG1'de S12'ye göre değişmezken, PG4 ve PG16'ı luteal doku lokalizasyonlarında azalmıştır (P<0,05). Sonuç olarak, bu öngörüler doğrultusunda, kolesterolün reverz taşınımından ziyade kolesterolün lipoprotein aracılı olarak alımının azalmasının luteal regresyonun sebebi olabileceği düşünülmektedir.Cholesterol is a key neutral lipid becoming the precursor of steroid hormones, bile acids, and vitamine D. Liver X receptors (LXR) play crucial roles in reverse transport of cholesterol and provides cholesterol efflux out of cells, such as macrophage. Although, the role of LXR in liver and other organs has been well characterized, the certain role has not been revealed in reproductive tract yet. If pregnancy does not occur,"production of proesterone drops, cellular integrity lose, tissue mass decrease" and regression begins through apoptosis and autophagy.The role of cholesterol efflux out of luteal tissues in the decrease of progesterone production during luteal regression procces has not been clarified yet. Objective was to investigate whether mechanism related to the reverse tranport of cholesterol leads to regression of corpus luteum. For this research, two experiments were planned, 1); ewes were divided into two sub-groups as pregnancy (G12, n=4), (G16, n=4), and 22 (G22, n=4) and cyclic (C12, n=4) and 16 (C16, n=4). In the second study 2) ewes were divided into four sub-groups after injection of PGF2α on the 12th day at the different time interval; control (n=4), 1 hour (n=4), 4 hour (n=4), and 16 hour (n=4), then CL tissues were collected. Gene expression levels of LXR pathway (LXRα, LXRβ, ABCA1, ABCG1, APOE, and APOA1), steriodegenic progesterone synthesis pathway (StAR, 3βHSD, P450scc), and cholesterol uptake receptors (SR-BI, LDLR) were evaluated by RT-qPCR and protein levels of LXR pathway genes were determined by western blot. Also, mRNA localizations of StAR, SR-BI, LXRα, LXRβ and ABCA1 were detected by in-situ hybridization. While mRNA expressione of LXRα, and ABCA1 were at steady state levels (P>0,05), expressions of LXRβ, ABCG1, APOE, and ApoA-1 were increased in S16 compared to S12 (P<0,05). However, expressions of StAR, 3βHSD, P450scc LDLR and SR-BI were decreased in S16 (P<0,05). Although, mRNA expressions of LXRα, ABCA1, and 3βHSD mRNA were decreased (P<0,05), LXRβ expression was increased (P<0,05) in PG1 compared to S12 in PGF2α-induced luteolysis. However, expressions of StAR, P450scc, LDRL, and SR-BI were at steady state level (P>0,05). While, mRNA expressions of LXRα, LXRβ, APOE, ApoA-I, LDLR, SR-BI, StAR, P450scc, and 3βHSD were decreased, expressions of ABCA1, and ABCG1 were not changed (P>0,05) in PG4 compared to S12. Expressions of StAR, P450scc, 3βHSD, LDLR, SR-BI, and ApoA-I were decreased (P<0,05), while ABCG1 increased (P<0,05) in PG16 compared to S12. Protein level of LXRβ was increased in S16 (P<0,05) compared to S12 while others was at stead state levels in both experimental models. In in-situ hybridization, StAR mRNA was higher in G16 that S16 (P<0,05). SR-BI levels of mRNA was not changed in PG1 and S12 (P<0,05), while decreased in both PG4, and PG16 (P<0,05). In conclusion, it is suggested that decrease of lipoprotein receptor-mediated cholesterol uptake may be the reason of lutel regression rather than the reverse transport of cholesterol.Bu tez Selçuk Üniversitesi Öğretim Üyesi Yetiştirme Programı Koordinatörlüğü tarafından 2013-ÖYP-090 proje numarası ile desteklenmiştir
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
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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