1,720,961 research outputs found
Stn1-Ten1 complex and telomerase limit replication stress at telomeres in Schizosaccharomyces pombe
No full textLes télomères sont des structures nucléoprotéiques qui protègent l’extrémité des chromosomes et assurent leur réplication. Ils sont constitués de séquences répétées, qui raccourcissent progressivement à chaque phase de réplication de l’ADN. La télomérase permet de rallonger ces séquences télomériques. Les télomères sont des régions difficiles à répliquer, pouvant générer un stress pour les cellules. Le but de ma thèse est de comprendre les mécanismes moléculaires mis en œuvre par la cellule pour réduire le stress réplicatif aux télomères et maintenir ainsi la stabilité du génome. Dans un premier temps, je me suis intéressé à l’étude du complexe Stn1-Ten1 qui contrôle négativement la télomérase. Nous avons pu identifier un domaine SIM dans Stn1, essentiel à l’interaction avec Tpz1-SUMO. J’ai montré que ce domaine joue un rôle important dans le recrutement du complexe aux télomères. Mes résultats suggèrent aussi que Stn1-Ten1 participerait activement à la réplication des télomères. Dans un second temps, j’ai étudié la dynamique de la réplication aux télomères en absence de la télomérase. Dans ce contexte, les cellules ne sont plus capables de répliquer de manière efficace leurs télomères. La réplication des télomères repose alors sur la voie de recombinaison homologue et des acteurs impliqués dans la réparation des cassures double-brin. Mes résultats suggèrent que la télomérase fonctionnerait comme une enzyme de réparation des fourches de réplication effondrées aux télomères. J’ai donc identifié deux nouveaux acteurs, le complexe Stn1-Ten1 et la télomérase, impliqués dans la réplication et la maintenance des télomères chez S. pombe.Telomeres are nucleoprotein structures that protect the end of chromosomes and allow efficient replication. They consist of repeated sequences, which progressively shorten after each cell division. Telomerase allows to extend these telomeric sequences. Telomeres are regions that are difficult to replicate. Which is a main source of replication stress. The goal of my thesis is to understand the molecular mechanisms involved to reduce telomere replicative stress and thus maintain the stability of the genome. At first, I was interested in the study of Stn1-Ten1 complex that negatively controls telomerase. We were able to identify a SIM domain in Stn1, which is essential for interaction with Tpz1-SUMO. I have shown that this domain plays an important role in the recruitment of the telomere complex. My results also suggest that Stn1-Ten1 would actively participate in telomere replication. Second, I studied the dynamics of telomere replication in the absence of telomerase. In this context, cells are no able to efficiently replicate their telomeres. The telomere replication is then based on the homologous recombination pathway and the actors involved in the repair of double-strand breaks. My results suggest that telomerase would function as a repair enzyme for replication forks collapsed to telomeres. To conclude, I identified two new actors, the Stn1-Ten1 complex and telomerase, involved in telomere replication and maintenance in S. pombe
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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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