1,721,010 research outputs found
Image-Based Automated Width Measurement of Surface Cracking
Full text linkThe detection of cracks is an important monitoring task in civil engineering infrastructure devoted to ensuring durability, structural safety, and integrity. It has been traditionally performed by visual inspection, and the measurement of crack width has been manually obtained with a crack-width comparator gauge (CWCG). Unfortunately, this technique is time-consuming, suffers from subjective judgement, and is error-prone due to the difficulty of ensuring a correct spatial measurement as the CWCG may not be correctly positioned in accordance with the crack orientation. Although algorithms for automatic crack detection have been developed, most of them have specifically focused on solving the segmentation problem through Deep Learning techniques failing to address the underlying problem: crack width evaluation, which is critical for the assessment of civil structures. This paper proposes a novel automated method for surface cracking width measurement based on digital image processing techniques. Our proposal consists of three stages: anisotropic smoothing, segmentation, and stabilized central points by k-means adjustment and allows the characterization of both crack width and curvature-related orientation. The method is validated by assessing the surface cracking of fiber-reinforced earthen construction materials. The preliminary results show that the proposal is robust, efficient, and highly accurate at estimating crack width in digital images. The method effectively discards false cracks and detects real ones as small as 0.15 mm width regardless of the lighting conditions
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
Guidelines to foster building with wood. BASAJAUN Public report D1.3
No full textWooden construction has great development potential in Europe and in the world. It is based on a renewable and inexhaustible source of raw material, which is wood. However, this potential is still not fully exploited, while broader use of wood in construction could bring significant benefits, not only in environmental but also in social and economic terms. Innovative technologies that allow rapid construction of energy-efficient wooden buildings, including multi-storey, are a great opportunity for wooden construction development. Therefore, it is important to foster building with wood, indicate the opportunities it brings and its benefits, but also take into account the barriers limiting its development. The aim of the report was to prepare guidelines for fostering wooden building and to indicate conditions of its development. The report covered:
▪ indication of major development opportunities for wooden construction in Europe and in the world, taking into account technical, political, economic and societal aspects,
▪ identification of significant barriers inhibiting the development of the use of wood in construction, including its weaknesses and threats in the technical, political, economic and societal context,
▪ assessment of the potential of using recycled wood in the construction sector, including estimating the potential supply of post-consumer wood waste and wood by-products,
▪ gathering examples of best practices in wood recycling in different countries based on case studies,
▪ basic characteristics of the regulatory framework and operational environment for recycled wooden products in chosen countries of the project partners,
▪ identification of key economic, social, environmental and technical benefits of using wood and wood products in construction.BASAJAUN is a European innovation action about sustainable building with wood. The main objective is to demonstrate how wood construction chains can be optimized to foster both rural development and urban transformation whilst being connected with sustainable forest management in Europe. The consortium comprises 29 partners from 12 countries including 8 leading research and technology organizations, 3 universities, 15 companies and 4 other public and sectoral organizations. The project is coordinated by the Tecnalia Research and Innovation Foundation in Spain and has received funding from the European Union's Horizon 2020 research and innovation programme under grant agreement no. 862942
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
Micro-meso characterization of prefabricated concrete-CLT adhesive joints
No full textTesis (Master of Science in Engineering)--Pontificia Universidad Católica de Chile, 2024El uso de adhesivos epóxicos como alternativa de conexión en elementos híbridos de madera-hormigón ha tomado gran relevancia durante las últimas décadas, específicamente aquellos con alta resistencia y un alto costo asociado. Estudios anteriores demuestran un comportamiento exitoso en cuanto a la rigidez de la conexión alcanzada, asegurando un correcto traspaso de esfuerzos de corte entre materiales y una reducción en la sección transversal requerida de los elementos. Sin embargo, la comparación entre distintos epóxicos comerciales frente a esfuerzos mecánicos es escasamente conocida. Esta investigación evalúa el uso de cinco adhesivos epóxicos comerciales (de mayor a menor costo) como conexión entre elementos prefabricados de madera contralaminada (CLT) y hormigón (dry-process), sometidos a esfuerzos de tracción y de corte. En primera instancia, cinco adhesivos fueron ensayados frente a esfuerzos de tracción (pull-off) para determinar la resistencia de la interfaz, cuyos resultados promedio variaron entre 0,62 MPa a 3,56 MPa. Además, se realizaron análisis de microscopía óptica y barrido electrónico (SEM) para observar el comportamiento micro-estructural de las muestras ensayadas, obteniendo una directa relación entre la penetración del adhesivo y su módulo elástico de tracción con la resistencia alcanzada. Luego, los tres adhesivos con mejor desempeño fueron testeados frente a ensayos de corte simétrico a pequeña escala, evaluando tensiones, deformaciones, evolución de daño y el modo de falla mediante correlación de imágenes digitales (DIC). Los resultados demostraron que el adhesivo con mejor comportamiento fue aquel que presentaba un mayor módulo elástico de tensión, relacionándose directamente con la tensión de corte alcanzada. Finalmente, se realizó un análisis de costo/beneficio, concluyendo que el adhesivo epóxico con mejor desempeño frente a esfuerzos de corte no es el más caro. De esta forma, resulta interesante y viable el desarrollo de un adhesivo epóxico técnicamente competente y a un bajo costo específicamente para elementos compuestos de madera/hormigón
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
- …
