1,720,953 research outputs found
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
Radio-frequency controlled quantum information processing using a microstructured Paul trap with integrated solenoid structures
No full textEin Quantencomputer bietet sowohl das Potential, bestimmte Problemstellungen effizienter zu lösen als jeder klassische Computer, als auch Beiträge zu Fragestellungen aus dem nahezu gesamten Spektrum physikalischer Forschung und darüber hinaus durch Quantensimulationen zu leisten. Eine der bisher am weitesten entwickelten Möglichkeiten zu seiner Realisierung stellen in einer Paul-Falle gespeicherte ultrakalte Ionen dar. Die wesentliche Herausforderung stellt hier, wie auch bei allen anderen physikalischen Implementierungsmethoden, die Entwicklung eines Gesamtsystems dar, das zu einem Quantencomputer skaliert werden kann, der imstande ist, Probleme von praktischer Relevanz zu lösen.
Diese Dissertation schließt sich den Bestrebungen Technologien für die Realisierung eines skalierbaren ionenbasierten Quantencomputers zu entwicklen an. Es wird ein optisches Verfahren zur präzisen Bestimmung der Position gespeicherter Ionen auf Basis von Fluoreszenzlicht vorgestellt, das es erlaubt eine Lokalisierung in allen drei Raumrichtungen mit einer Genauigkeit weit unterhalb der Wellenlänge der Ionenfluoreszenz vorzunehmen. Dieses Verfahren ermöglicht die Entwicklung einer neuartigen Methode zur Minimierung unerwünschter Mikrobewegung gespeicherter Ionen. Die Methode basiert auf der Analyse von Ionentrajektorien, die durch gezielte Manipulation des speichernden Potentials einer Ionenfalle erzeugt werden und ist insbesondere zur Verwendung mit ausgedehnten, planaren Fallenchips geeignet, da sie unabhängig von der Propagationsrichtung des verwendeten Laserlichts ist. Desweiteren wird eine Methode entwickelt um ein gespeichertes Ion als hochsensitiven Kraftsensor einzusetzen, der es ermöglicht Kräfte im Bereich von Yoctonewton nachweisen zu können. Diese basiert ebenfalls auf der optischen Positionsbestimmung und erfordert zusätzlich lediglich Kenntnis über das speichernde Potential.
Die Methode ist hochkompatibel mit miniaturisierten und stark integrierten Ionenfallen und bietet sich somit für dem Einsatz in der Präzisionsmetrologie an. Der Verwendung von Magnetfeldgradienten ermöglicht die Manipulation einzelner Qubits und die Realisierung von Mehr-Qubit-Gattern allein durch Hochfrequenzsignale. Dies stellt aufgrund deren hohen Integrierbarkeit eine potentielle Schlüsseltechnologie zur Skalierung ionenbasierter Quantencomputer dar. Diese Arbeit erweitert die Funktionalität einer mikrostrukturierten Ionenfalle mit integrierten Spulenstrukturen um einen dynamisch steuerbaren Magnetfeldgradienten. Die erzeugten Gradienten können statisch oder oszillierend sein und auf Zeitskalen im Mikrosekundenbereich variiert werden. Oszillierende Magnetfeldgradienten ermöglichen die Beschleunigung von Mehr-Qubit-Gattern sowie die Erzeugung maßgeschneiderter temporärer Kopplungsmuster zwischen Qubits. Der neu geschaffene Freiheitsgrad einer dynamischen Kontrolle des Gradienten wird verwendet um eine optimierte Qubit-Adressierung im Frequenzraum zu demonstrieren.A quantum computer offers both the potential to solve certain problems more efficiently than any classical computer and to contribute to questions across practically the entire spectrum of physical research, as well as beyond, through quantum simulations. One of the most advanced approaches to realizing a quantum computer to date is based on ultracold ions trapped in a Paul trap. The main challenge here, as with all other physical implementation methods, lies in the development of a complete system that can be scaled into a quantum computer capable of solving problems of practical relevance.
This dissertation contributes to the efforts to develop technologies for the realization of a scalable ion-based quantum computer. An optical method for the precise determination of the position of trapped ions based on fluorescence light is presented, which allows localization in all three spatial dimensions with an accuracy well below the wavelength of the ion fluorescence. This method enables the development of a novel approach to minimizing undesired micromotion of trapped ions. The approach is based on the analysis of ion trajectories generated by deliberate manipulation of the trapping potential of an ion trap and is particularly suitable for use with extended, planar trap chips, as it is independent of the propagation direction of the laser light used. Furthermore, a method is developed to use a trapped ion as a highly sensitive force sensor, capable of detecting forces in the yoctonewton range. This method is also based on optical position determination and requires only knowledge of the trapping potential in addition. It is highly compatible with miniaturized and highly integrated ion traps, making it suitable for applications in precision metrology. The use of magnetic field gradients enables the manipulation of individual qubits and the realization of multi-qubit gates solely through radiofrequency signals. Due to their high integrability, this represents a potential key technology for scaling ion-based quantum computers. Thiswork extends the functionality of a microstructured ion trap with integrated solenoid structures to include a dynamically controllable magnetic field gradient. The generated gradients can be static or oscillating and can be varied on timescales in the microsecond range. Oscillating magnetic field gradients enable the acceleration of multiqubit gates as well as the creation of customized, temporary coupling patterns between qubits.
The newly created degree of freedom provided by dynamic gradient control is used to demonstrate optimized qubit addressing in the frequency domain
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
- …
