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Langzeitergebnisse nach retroiridaler Implantation einer Verisyse-Kunstlinse bei fehlendem Kapselsacksupport
Full text linkZielsetzung: Ziel der vorliegenden Arbeit ist eine retrospektive Evaluation des Einsatzes der retroiridal implantierten Kunstlinse „Verisyse VRSA 54 Aphakie“ der Firma Abbott Medical Optics anhand von postoperativen Langzeit-Befunden.
Patienten und Methoden: In dieser retrospektiven Untersuchung wurden die Daten von 38 Augen von 37 Patienten mit einem Follow-up von mindestens 6 Monaten (durchschnittliche Beobachtungszeit von 22 ± 16 Monaten) nach der Implantation einer retroiridal fixierten Verisyse-IOL erfasst. Die Patienten erhielten zwischen 2007 und 2014 in der Klinik für Augenheilkunde am Universitätsklinikum des Saarlandes in Homburg/Saar die retroiridale Implantation einer Verisyse-Kunstlinse bei fehlendem Kapselsacksupport. Die Daten wurden in eine SPSS Datenbank eingegeben. Indikationen, Voroperationen, prä- und postoperative biometrische Daten, intraokularer Druck, Visus und Refraktion sowie postoperative Komplikationen wurden evaluiert. Aufgrund der retrospektiven Natur der Studie konnten nicht alle Parameter bei allen Patienten erhoben werden.
Ergebnisse:
Die häufigste Indikation zur retroiridalen Implantation einer Verisyse-Kunstlinse war eine Kunstlinsenluxation (n=16). Die zweithäufigste Indikation war eine primäre Implantation bei intraoperativer Komplikation (n=9), gefolgt von einer sekundären Implantation nach IOL-Explantation in Folge einer Endophthalmitis (n=5). Eine seltene Indikation stellte eine Ektopia lentis infolge eines Marfan-Syndroms (n=2) dar. Der Langzeitvisus in einer Beobachtungszeit von 22 ± 16 Monaten lag bei dieser Studie durchschnittlich bei (0,5±0,4 Decimal) mit signifikantem Unterschied in Wilcoxon-Test zum präoperativen Visus (0,2±0,2 Decimal) (p<0,0001). Die präoperativen mittleren Keratometrie Kmean Werte (Kmean, 43,3 ± 2 Dioptrien (D)) waren signifikant größer als die postoperativen Langzeit-Kmean Werte (42,6±2 D) (p=0,004). Der Vergleich zwischen den präoperativen Mittelwerten der Achsenlänge (23,9±2,0 mm) und den Langzeitwerten (23,8 ± 2,0 mm) mittels IOL-Master (Fa. Carl Zeiss Meditec AG, Jena, Deutschland) ergab keinen statistisch signifikanten Unterschied (p=0,25). Die Langzeitwerte der Vorderkammertiefe zeigten einen statistisch signifikanten Unterschied zwischen der Pentacam (4,0±0,6 mm, Fa. Oculus, Wetzlar, Deutschland) und dem IOL-Master (4,2±0,6 mm) (p=0,02). Statistisch nicht signifikant waren die Vergleichswerte der Vorderkammertiefe zwischen der Vorderaugenabschnitts-OCT (4,0±0,4 mm) und dem IOL-Master (4,2±0,6 mm) (p=0,1) sowie zwischen der Vorderaugenabschnitts-OCT (4,0±0,4 mm) und der Pentacam (4,0±0,6 mm) (p=0,3).
Bei 58% der Patienten wurde eine vermehrte Pigmentierung des Trabekelmaschenwerks (Irispigmentdispersion) beobachtet. Es wurde in dieser Studie - wie erwartet - beobachtet, dass mit dunklerer Irisfarbe die postoperative Pigmentierung des Kammerwinkels zunimmt. Bei allen Patienten lag aber der Langzeit-IOD unabhängig vom Pigmentationsgrad des Kammerwinkels im Normbereich. Es fand sich in keinem Auge eine Iris-Atrophie. Die Irisdicke gemessen mittels der Vorderaugenabschnitts-OCT war normwertig (402±45 µm) und ohne signifikanten Unterschied zum Partnerauge (406±48 µm) (p=0,14). Die postoperative Hornhautendothelzellzahl lag im Normbereich (1898±360 Zellen/mm²) ohne Hinweis auf einen postoperativen Verlust der Hornhautendothelzellen oder eine Hornhautdekompensation.
Als potenziell visuslimitierende Komplikationen der retroiridalen Verisyse-Implantation stellten sich in dieser Studie vor allem das postoperative cystoide Makulaödem (10,5%) und die epiretinale Gliose (13,2%) heraus. Bei keinem Patienten kam es in dieser Langzeitverlaufsstudie zu einer Netzhaut-Ablösung oder einer Dislokation bzw. Subluxation der Verisyse-Linse.
Schlussfolgerung: Insgesamt stellt die retroiridale Verisyse-IOL auch im Langzeitverlauf eine sichere und komplikationsarme Alternative bei fehlendem Kapselsacksupport mit einem breiten Indikationsspektrum dar. Als visuslimitierende Komplikationen müssen vor allem das zystoide Makulaödem und die epiretinale Gliose betrachtet werden
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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