1,720,954 research outputs found
QUAKE-IP Control de qualitat i avaluació en la producció
No full text[ES] Proyecto multidisciplinar, realizado en equipo con 4 estudiantes de distintas disciplinas, que
consiste en diseñar y fabricar un prototipo de una máquina, que se usará en el control de
calidad del sector del doblado de planchas metálicas. Esta máquina mediante un sensor laser,
escaneará y representará una sección de la chapa ya doblada, que se podrá medir mediante el
uso de CAD, agilizando y mejorando la precisión del proceso del control de calidad.
Este proyecto consistirá en diseñar, haciendo uso de piezas normalizadas, y haciendo uso de
componentes que podemos encontrar en el mercado, además se deberán cumplir ciertos
requisitos propuestos.
Finalmente se fabricará un prototipo, totalmente funcional.[EN] Multidisciplinary project, carried out as a team with 4 students from different disciplines, which
consists of designing and manufacturing a prototype of a machine to be used in quality control
in the sheet metal bending sector. This machine will use a laser sensor to scan and represent a
section of the already bent sheet metal, which can be measured using CAD, thus speeding up
and improving the precision of the quality control process.
This project will consist of designing, making use of standardised parts, and using components
that can be found on the market, in addition to meeting certain proposed requirements.
Finally, a fully functional prototype will be manufactured.Graboleda Tornero, A. (2023). QUAKE-IP Control de calidad y evaluación en la producción. Universitat Politècnica de València. https://riunet.upv.es/handle/10251/198381TFG
Millora de l'adhesió interlaminar en peces produïdes per impressió aditiva
No full text[ES] Actualmente, la impresión 3D FFF (Fabricación por Filamento Fundido) se ha consolidado como una de las tecnologías más relevantes dentro del ámbito de la fabricación aditiva, gracias a su capacidad para agilizar los procesos de diseño y producción, ofrecer un alto grado de personalización y reducir los costes.
No obstante, uno de los principales desafíos de esta tecnología es la anisotropía inherente de las piezas fabricadas mediante esta tecnología, que se manifiesta especialmente en la dirección perpendicular a los planos interlaminares (generalmente asociada al eje Z). Esta anisotropía da lugar a una reducción notable de las propiedades mecánicas en dicha dirección, lo que puede limitar el uso de las piezas en aplicaciones exigentes si no se realiza un análisis adecuado de su comportamiento estructural.
El presente estudio tiene como objetivo el diseño de un adaptador que pueda acoplarse a la boquilla de una impresora 3D FFF, con el fin de mejorar la adhesión entre capas durante el proceso de fabricación. La pieza diseñada actúa planchando las capas sucesivas al mismo tiempo que se depositan, favoreciendo así una mayor cohesión interlaminar y, en consecuencia, una mejora en las propiedades mecánicas en la dirección Z. Todo ello, sin afectar de manera significativa a los tiempos de impresión.
Con esta mejora se espera que el adaptador diseñado y propuesto posibilite la ampliación de las aplicaciones de la impresión 3D FFF, contribuyendo a superar las limitaciones actuales derivadas de la anisotropía en la dirección de impresión vertical.[EN] Currently, FFF (Fused Filament Fabrication) 3D printing has established itself as one of the most relevant technologies in the field of additive manufacturing, thanks to its ability to streamline design and production processes, offer a high degree of customisation and reduce costs.
However, one of the main challenges of this technology is the inherent anisotropy of the parts manufactured using this technology, which is particularly apparent in the direction perpendicular to the interlaminar planes (generally associated with the Z axis). This anisotropy results in a significant reduction of the mechanical properties in this direction, which can limit the use of the parts in demanding applications without a proper analysis of their structural behaviour.
The aim of this study is to design an adapter that can be attached to the nozzle of an FFF 3D printer, in order to improve the adhesion between layers during the manufacturing process. The designed part acts by flattening the successive layers at the same time as they are deposited, thus favouring greater interlaminar cohesion and, consequently, an improvement in the mechanical properties in the Z-direction. All this, without significantly affecting printing times.
With this improvement, it is expected that the designed and proposed adapter will enable the expansion of FFF 3D printing applications, contributing to overcome the current limitations derived from the anisotropy in the vertical printing direction.[CA] Actualment, la impressió 3D FFF (Fabricació per Filament Fos) s'ha consolidat com una de les tecnologies més rellevants dins de l'àmbit de la fabricació additiva, gràcies a la seva capacitat per a agilitzar els processos de disseny i producció, oferir un alt grau de personalització i reduir els costos.
No obstant això, un dels principals desafiaments d'aquesta tecnologia és l'anisotropia inherent de les peces fabricades mitjançant aquesta tecnologia, que es manifesta especialment en la direcció perpendicular als plans interlaminars (generalment associada a l'eix Z). Aquesta anisotropia dona lloc a una reducció notable de les propietats mecàniques en aquesta direcció, la qual cosa pot limitar l'ús de les peces en aplicacions exigents si no es realitza una anàlisi adequada del seu comportament estructural.
El present estudi té com a objectiu el disseny d'un adaptador que pugui acoblar-se a l’embocadura d'una impressora 3D FFF, amb la finalitat de millorar l’adhesió entre capes durant el procés de fabricació. La peça dissenyada actua planxant les capes successives al mateix temps que es dipositen, afavorint així una major cohesió interlaminar i, en conseqüència, una millora en les propietats mecàniques en la direcció Z. Tot això, sense afectar de manera significativa als temps d'impressió.
Amb aquesta millora s'espera que l'adaptador dissenyat i proposat possibiliti l'ampliació de les aplicacions de la impressió 3D FFF, contribuint a superar les limitacions actuals derivades de l'anisotropia en la direcció d'impressió vertical.Graboleda Tornero, A. (2025). Mejora de la adhesión interlaminar en piezas obtenidas por impresión aditiva. https://riunet.upv.es/handle/10251/227501TFG
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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