1,354,178 research outputs found
Mike Pascuzzo, University of Maryland track and field, circa 1983
No full textMike Pascuzzo, a member of the University of Maryland track and field team, circa 1983
A detailed micro-model for brick masonry structures based on a diffuse cohesive-frictional interface fracture approach
No full textIn the past decades, the mechanical behavior of brick masonry material has been largely investigated using different modeling strategies, ranging from purely microscopic to purely macroscopic ones. The so-called simplified micro-modeling approaches, in which the behavior of mortar joints and brick/mortar interfaces is lumped in discontinuous elements, are commonly judged as very effective for accurately representing the interaction between the masonry constituents with an acceptable computational burden. However, they completely disregard the competition between brick/mortar decohesion and mortar cracking, whose role is not negligible, especially in presence of sufficiently thick joints and/or high-strength mortars. In this work, a detailed micro-modeling approach is proposed for the nonlinear analysis of brickworks subjected to in-plane loads. Such an approach allows failure to occur at the brick/mortar interface level and/or inside the mortar layer, while keeping the discrete nature of fracture phenomena. For this purpose, a novel diffuse cohesive-frictional interface approach for joints is presented, able to simulate multiple micro-crack onset and propagation along a-priori unknown paths. Suitable comparisons with a simplified micro-model are provided to validate the proposed approach. Moreover, a good agreement with the experimental outcomes is found, thereby assessing the reliability of the present fracture-based detailed micro-model in the numerical prediction of masonry strength under complex loading conditions
Evaluating the Ability of Large Language Models to Generate Motivational Feedback
No full textThe paper describes and evaluates the use of large language models (LLMs) to provide personalized motivational feedback in the context of Intelligent Tutoring Systems (ITS). Specifically, the main contributions of the present work are the definition of a novel evaluation framework and the early application of such a framework to assess the ability of LLMs to generate textual feedback including motivational features. The experimentation results show that LLMs demonstrate a promising ability to generate motivational feedback and, therefore, a good chance to be integrated as an additional model into the traditional ITS architecture
Crack propagation modeling in functionally graded materials using Moving Mesh technique and interaction integral approach
No full textThis paper presents a novel FE modeling approach based on Moving Mesh technique to reproduce crack propagation mechanisms in Functionally Graded Materials. The moving mesh is consistent with the Arbitrary Lagrangian-Eulerian formulation, which is suited to handle growing random cracks, avoiding extensive remeshing processes. This approach is based on the Interaction Integral Method to extract the mixed-mode Stress Intensity Factors, which are necessary to establish crack onset conditions and propagation direction. Among the different available options for FGM, the incompatibility formulation is adopted. The proposed scheme reproduces the propagation mechanisms by moving the computational nodes around the crack tip, according to standard fracture criteria. Mesh regularization technique based on proper rezoning equations ensures the consistency of the motion, reducing mesh distortion. The reliability of the proposed method is evaluated through comparisons with experimental data and existing numerical approaches. The computational efficiency is checked through parametric analyses on mesh discretization and accuracy in the prediction of the crack path and fracture variables. The results show how the proposed method could represent a valid tool to simulate the propagation mechanisms in FGM, in which heterogeneous macro-properties involve complex crack paths
A stress-driven model incorporating surface energy effects for the bending analysis of functionally graded nanobeams with loading discontinuities
No full textauthors for study the mechanical response of a functionally graded (FG) nanobeams under constant distributed
transverse loading, is extended and applied for the bending analysis of FG nanobeams in presence of discontinuous
distributed loadings. Compared to its original formulation, the novel proposed approach assumes that the nanobeam
is divided in two parts due the load discontinuity at an internal point of the nanobeam axis. Therefore, the governing
equations and the related standard boundary conditions are derived by applying the principle of virtual work in each
part of the FG nanobeam. As widely discussed in literature, additional compatibility boundary conditions and
constitutive continuity conditions must be satisfied at the interior point where the loading discontinuity occurs. Several
results of a parametric analysis are presented to show the effectiveness of the proposed novel approac
Problematizar los bosques nativos de la geografía escolar : Hacia la construcción de una mirada crítica
Get PDFLas problemáticas ambientales, analizadas desde una mirada compleja y multidimensional, es una estrategia que sitúa al alumno en una educación globalizadora. La finalidad del proyecto de aprendizaje basado en problemas, se inserta en fortalecer capacidades y desarrollar un pensamiento crítico a través de actividades de reflexión y de argumentación, que contribuyan al desarrollo de acciones y compromiso ciudadano con el entorno ambiental. En este contexto, la siguiente secuencia didáctica plantea analizar la deforestación de los bosques nativos de la Región Chaqueña en Argentina, propiciando la incorporación de valores ambientales y fomentar una actitud crítica a la vez que constructiva. Para ello se utilizó datos de una encuesta realizada en la comunidad educativa de la Escuela Secundaria Nº 20 de Tandil, a docentes, auxiliares, alumnos y familiares. Entre las conclusiones se resalta que si bien la mayoría conocían las causas de la deforestación, desconocían el logo de certificación de los bosques de manera sustentable. Es a partir de ello que el producto final es la elaboración de un folleto de concientización y divulgación que está vinculado con información sobre un logo de certificación ambiental de los bosques; y de esta manera promover el uso ambientalmente responsable, socialmente benéfico y económicamente viable de los bosques del mundo.Fil: Pascuzzo, Marisa. Escuela de Educación Secundaria Nº 20
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
Familia Pagliafora : una historia agroecológica.
No full textTrabajo Final IntegradorEste documental narra la historia de vida de la familia Pagliafora. Una familia que decidió dejar la ciudad de Mendoza para asentarse en una zona rural en la década del 90’. El modo de vida urbano los motivó a decidir un cambio radical en su filosofía de vida. Luego de asentarse en el campo, se vieron sorprendidos por la cantidad de agroquímicos utilizados en la producción de alimentos. Luego de transitar por estafas de intermediarios y deudas económicas contraídas, encontraron en la agroecología una alternativa superadora. Tejiendo redes con otros productores agroecológicos fundaron en el 2005, la “Bioferia” en Mendoza Capital, una de las primeras ferias agroecológicas del país, en la que encontraron estabilidad económica para desarrollar sus vidas. A partir de su experiencia con la agroecología, aprendieron a cultivar sin agroquímicos. Este aprendizaje les generó una relación consciente y sustentable con la naturaleza y así producir alimentos sanos sin poner en riesgo el ambiente y la salud de las personas. La historia de esta familia es una de las numerosas experiencias que nos demuestra que es posible vivir en una cotidianeidad con equilibrio socioambiental. Este documental propone conocer desde adentro la finca agroecológica Pagliafora, con el objetivo de visibilizar las dinámicas laborales y sociales que ocurren dentro de ella, para exponer la importancia de la agroecología en la capital de Mendoza y sus alrededores.Fil: Pascuzzo, Lucas. Universidad Nacional de San Martín. Escuela de Arte y Patrimonio; Buenos Aires, Argentina
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
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