1,720,953 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
Modeling and Control of Aquatic Surface Robots with Application to Acoustic Telemetry
No full textThesis (Ph.D.)--Michigan State University. Electrical and Computer Engineering - Doctor of Philosophy, 2025Aquatic robots have recently generated significant interest as sampling platforms for environmental studies since their mobility allows for a greater breadth of experiments than more established stationary sensors. Two types of surface vehicles are considered in this work: steerable drifters and uncrewed surface vehicles (USVs). Comparing to underwater vehicles, both drifters and USVs have the advantages of being able to communicate with RF signals as well as localize themselves readily with GPS. Steerable and active drifters have emerged as promising new platforms that can modify their trajectories using rudders and through sparing application of thrusters. Such drifters retain the energy-efficiency advantage of passive drifters with added maneuverability. The first part of this dissertation focuses on the modeling, analysis, and control of active drifters with the motivation to use them as mobile sampling platforms in environments with pronounced ambient flows such as rivers and lakes with circulation structures. A dynamic model is developed for steerable and active drifters, which is then used for adaptive parameter estimation and reachability estimation. Optimal control of drifters to maintain them as energy-efficient platforms is also investigated in a one-dimensional setting. Sets of state-space locations where the optimal control changes can be thought of as curves parameterized by one of the costate variables. Such curves enclose regions in the state-space for which the optimal control is the same, allowing the state-space to be mapped to the optimal control. The optimal control may then be determined by state feedback, which is shown to be more robust than open-loop optimal control in simulation. The proposed optimal control is further validated by data collected in experimental trials. We further investigate the use of USVs for sensing applications such as acoustic telemetry. Aquatic acoustic telemetry is a widely-used method for tracking movements of animals and studying their behaviors. In acoustic telemetry animals are implanted with an acoustic tag broadcasting a unique identification code, which is decoded by an acoustic receiver. USVs and and Autonomous Underwater Vehicles (AUVs) are being increasingly used as mobile receiver platforms, but their performance as acoustic telemetry platforms is not well studied. This work characterizes the performance of a USV as an acoustic telemetry platform, which is then used to improve estimates of tag locations and to optimally select waypoints. The USV considered is intended to be a low-cost, easy-to-operate platform that can be constructed by non-experts. Detection efficiency, or the probability of successfully detecting an acoustic tag, is examined as a function of distance between the tag and the receiver. The effect of thruster use is also examined. This characterization is then used with a genetic algorithm to determine the optimal set of waypoints for the USV to localize acoustic tags, considering the trade-off between distance traveled and estimated localization error. Data consisting of successful and failed detections are used to determine the maximum a posteriori estimates of tag locations. Tag locations estimated from experimental data using the proposed method are shown to be more accurate than the typical presence-absence estimates of tag locations. The control of USVs has been widely studied; however, prior work has been primarily focused on continuous-time controllers. Limitations on computational power and actuator response can make such controllers difficult to implement. Event-triggered control, a control paradigm in which the applied control is updated when a condition on the state (called an event-trigger) is met, addresses these limitations. Prior work on event-triggered control has required that the continuous-time closed-loop system be input-to-state stable with respect to sampling error in the control. Due to the nonlinear, non-holonomic and underactuated nature of existing USV models, however, it may be difficult to prove input-to-state stability. This work proposes a novel means of designing event-triggers that relaxes this stability requirement. The proposed event-triggers are designed directly from a Lyapunov function for the system rather than comparison functions used in previous work on event-triggered control. For a continuous-time controller that is globally asymptotically stable, the control sampled using the proposed event-trigger is also globally asymptotically stable. This approach is validated with a simulation example. To mitigate Zeno behavior, a minimum inter-sampling interval is included in the design of the event-trigger. Although stability of the closed-loop system cannot be guaranteed with a minimum inter-sampling interval, convergence of system states to desired values is observed in simulation.Description based on online resource. Title from PDF t.p. (Michigan State University Fedora Repository, viewed ).Includes bibliographical references
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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