1,720,953 research outputs found
Desarrollo de un sistema robótico para la conducción autónoma de carros de compra en entornos estructurados
No full textEl presente trabajo describe el desarrollo de un sistema robótico para la conducción autónoma de carros de compra en entornos estructurados, con el objetivo de mejorar la experiencia del usuario a la hora de localizar productos y mejorar la eficiencia operativa en tiendas minoristas. Para lograrlo se diseñó e implementó una plataforma basada en ROS 2, que hace uso de algoritmos de navegación autónoma, planificación de rutas y evasión de obstáculos, dentro de la arquitectura del sistema se incluye una interfaz gráfica de usuario que permite la selección de productos y el seguimiento en tiempo real del proceso de compra. Para desarrollar exitosamente el proyecto, se siguió la metodología de proceso racional unificado (con siglas, RUP) integrado a la metodología concurrente de Ulrich, a través de la cual se realizaron cuatro fases; el diseño estructural de la plataforma robótica, el desarrollo de la interfaz de usuario, la implementación del sistema en un entorno simulado y su validación en un entorno real. Se realizaron pruebas en simulación haciendo uso de Gazebo para luego llevar a cabo pruebas en el prototipo real, entre las cuales se destaca la validación de precisión, repetibilidad y eficiencia en la navegación. Dentro de los resultados se destaca que el sistema alcanzó una precisión de navegación con un error promedio de 0.223 m y una consistencia de navegación del 98.7% en entornos sin obstáculos dinámicos, a pesar de esto, se identificaron oportunidades de mejora en escenarios con alta densidad de obstáculos dinámicos. En cuanto a la optimización de rutas, se obtuvo una eficiencia del 79.84% en comparación con la ruta teórica, la cual ignora obstáculos. Adicionalmente el funcionamiento de la interfaz gráfica fue evaluado mediante pruebas de usabilidad con 21 usuarios, divididos en grupos por su experiencia al utilizar sistemas robóticos, obteniendo una calificación promedio de 85.24, lo cual indica una experiencia de usuario positiva, pero con posibilidad de mejora, especialmente para usuarios de menor experiencia. A partir de las pruebas experimentales realizadas en condiciones de laboratorio, se pudo concluir que la implementación de este tipo de sistemas podría representar una solución viable para mejorar la experiencia del cliente durante su proceso de compraThe present work describes the development of a robotic system for the autonomous driving of shopping carts in structured environments, with the aim of improving the user experience when locating products and enhancing operational efficiency in retail stores.
To achieve this, a platform based on ROS 2 was designed and implemented, making use of autonomous navigation algorithms, route planning, and obstacle avoidance. Within the system architecture, a graphical user interface is included, allowing product selection and real-time tracking of the shopping process. To successfully develop the project, the Rational Unified Process (RUP) methodology was followed, integrated with Ulrich's concurrent methodology, through which four phases were carried out: the structural design of the robotic platform, the development of the user interface, the implementation of the system in a simulated environment, and its validation in a real environment.
Simulation tests were conducted using Gazebo, followed by tests on the real prototype, among which the validation of accuracy, repeatability, and navigation efficiency stand out. Within the results, it is highlighted that the system achieved a navigation accuracy with an average error of 0.223 m and a navigation consistency of 98.7% in environments without dynamic obstacles. Despite this, opportunities for improvement were identified in scenarios with a high density of dynamic obstacles. Regarding route optimization, an efficiency of 79.84% is found in comparison of the theoretical route, considering that it ignores obstacles. Additionally, the performance of the graphical interface was evaluated through usability tests with 21 users, divided into groups based on their experience in using robotic systems, obtaining an average rating of 85.24, which indicates a positive user experience, but with room for improvement, especially for less experienced users.
Based on the experimental tests conducted under laboratory conditions, it was posible to conclude that the implementation of this type of system could represent a viable solution to improve the customer experience during their shopping processProyecto de grado (Ingeniero Mecatrónico)-- Universidad Autónoma de Occidente, 2025PregradoIngeniero(a) Mecatrónico(a
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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