1,720,973 research outputs found
Force Sensing Resistors Used as Plantar Impedance Plethysmography Electrodes
No full textDiabetic foot ulcers (DFUs) are an ominous consequence of diabetic foot. To develop a multidimensional lesion warning device, several variables must be considered, among which vascular parameters. To minimize the number of sensors, we investigate the use of standard flexible force sensing resistors (FSRs), FSR402 and FSR406, to detect not only plantar pressure but also bioimpedance plethysmography. Since FSRs include conductive electrodes covered by polymer film, the interface with the subject can be considered a capacitive electrode. We present a special impedance plethysmography (IPG) circuit to inject current using FSRs and measuring the resulting voltage from other FSRs contacts. IPG simulations with two modeled FSRs, two contacts each, were not successful, but using four FSRs, one capacitive contact each, shows a precision within 4% of the expected FSR resistor value. The IPG system was verified with simultaneously matching ECG-lead I, Ag–AgCl, and capacitive electrode signals alongside power spectra. For the first time, four sole pressure sensors are used also as bioimpedance electrodes to detect cardiac activity with standard components at frequencies up to 50 kHz and simulated as well as experimentally verified on one healthy subject
Ingeniería Biomédica perspectivas desde el Uruguay
Full text linkAutores: Ricardo Armentano, Julio Arzuaga, Pedro Arzuaga, Fernando Brum, Gustavo Brum, Juan Bussi, Daniel Cibils, Henry Engler, Jacques Fauquex, Liliana Gadola, Alberto Gómez, Alvaro Gómez, Santiago González, Daniel Geido, Javier Hurtado, Jorge Lobo, Bernardo Martínez, Eduardo Mizraji, Pablo Musé, Franco Pessana,
José Pedro Podestá, Gregory Randall, Walter Reyes, Oscar Sanz, Franco Simini, Hamlet Suárez, Mario Svirsky,
Carlos Trampal y Horacio Venturino.La Ingeniería Biomédica contribuye con equipamiento y métodos de análisis a la evolución de la Medicina y por ende a la salud de la gente. Los resultados obtenidos se traducen en una mejor calidad de vida, lo
que asigna a la Ingeniería Biomédica un lugar de indudable importancia en las sociedades actuales y futuras. Este libro reúne algunos temas de Ingeniería Biomédica presentados por especialistas e investigadores que reflejan el estado de conocimiento desde la perspectiva del Uruguay. Dando un paso más, los autores anticipan las direcciones que habrán de seguir sus respectivas especialidades. A través de sus capítulos, con una visión docente, el libro presenta los enfoques complementarios de la fisiología y de la ingeniería para el diálogo entre profesionales de la salud y proyectistas de instrumentos de uso clínico. Podrá constituir también una lectura inicial para el estudio de la Ingeniería Biomédica. La propuesta incluye el proyecto de equipos biomédicos con elementos de seguridad del paciente, fisiología celular e instrumentación
asociada, dinámica arterial, electrofisiología intervencionista, proyecto de marcapasos, medidas de mecánica ventilatoria, instrumentos de diálisis, navegación virtual para neurocirugía, redes neuronales, EEG y estados de conciencia, implantes cocleares y evaluación vestibular, biosensores e instrumentación de análisis de laboratorio, los formatos de imágenes médicas y las aplicaciones clínicas de la tomografía por emisión de positrones (PET) en neurología. Completan la serie un capítulo sobre mantenimiento y una guía para cuatro clases prácticas de un curso de Ingeniería Biomédica. La variedad de puntos de vista profesionales hace de la obra un rico y variado espacio de intercambio técnico y científico.Prólogo / Rafael Guarga. -- Introducción / Franco Simini. -- 1. Proyecto de equipos biomédicos / Franco Simini. -- 2. Seguridad del paciente y del operador / Franco Simini. -- 3. Propagación nerviosa y contracción muscular / Gustavo Brum. -- 4. Equipos de abalación de electrofisiología cardíaca / Walter Reyes. -- 5. Proyecto de marcapasos / Julio Arzuaga, Fernando Brum, Pedro Arzuaga y Oscar Sanz. -- 6. Dinámica arterial / Ricardo Armetano. -- 7. Medidas de mecánica ventilatoria / Javier Hurtado y Franco Simini. -- 8. Equipos para diálisis / José Pedro Podestá y Liliana Gadola. -- 9. Biosensores / Juan Bussi. -- 10. Equipamiento para análisis de laboratorio / Horacio Venturino. -- 11. Electroencefalograma y estados de conciencia / Daniel Cibils. -- 12. Órganos y equipos de medida del equilibrio / Hamlet Suárez, Franco Simini y Pablo Musé. -- 13. Navegación virtual para neurocirugía / Gregory Randall y Álvaro Gómez. -- 14. Implantes cocleares / Mario Svirsky y Hamlet Suárez. -- 15. Redes neuronales / Eduardo Mizraji. -- 16. Tomografía por emisión de positrones (PET) / Henry Engler. -- 17. Imágenes médicas en entorno digital / Jacques Fauquex. -- 18. Gestión del equipamiento biomédico / Franco Simini y Alberto Gómez. -- 19. Prácticas de laboratorio / Santiago González, Jorge Lobo, Daniel Geido y Franco Simini
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
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