The ring compression test: Analysis of dimensions and canonical geometry

The compression ring test is universally accepted as a perfectly valid method by which determine simply and reliably the adhesion friction factor in a plastic deformation process. Its methodology is based on the application of geometric changes as both the reduction in thickness as the decrease in bore inner diameter in the strained ring itself. In this paper the performance of that test is the basis for establishing the coefficient of friction on a forging process so that, given this, its application to Upper Bound Theorem (UBT) by model Triangular Rigid Zones (TRZ), enable the establishment an intercomparison with empirical force, reaching a cuasivalidation of this Theorem in a certain range.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

O contributo da auditoria pública para a Good Governance

Dissertação de Mestrado em Gestão e Políticas PúblicasEste trabalho visa discutir o papel das ISC enquanto entidades de auditoria pública, e qual o seu contributo para a good governance. Das diversas pesquisas bibliográficas efetuadas, apurou-se que a good governance é tida como uma forma de governação, boa, que assenta em participação pública, em transparência, responsabilização, respeito, cumprimento da lei e satisfação das necessidades das populações, onde se basearia a força do desenvolvimento social. Face aos objetivos de trabalho definidos, foi assim produzido e aplicado um guião de entrevista a vários intervenientes qualificados de auditoria pública, tendo-se recolhido opinião, experiências e visão sobre o modo como a good governance acontece hoje em Portugal, nomeadamente quanto à transparência da governação, quanto acautela os riscos da atividade pública e quanto permite a aplicação da accountability. A utilização e aplicação de auditoria pública, facilitará o processo de criação de valor e confiança pública de toda uma comunidade. De acordo com a literatura de referência e com os entrevistados, a auditoria de contexto público tem um papel determinante na concretização da good governance. De resto, vários organismos internacionais de referência (OCDE, ONU, FMI, Banco Mundial, entre outros) perseguem e fomentam a prática da good governance, não só, mas também, com recurso ao reforço de práticas e procedimentos de auditoria pública, fazendo relevar o papel complementar entre a produção de auditorias de compliance e de auditorias de performance. Das entrevistas aos intervenientes qualificados nestas matérias, foram obtidos importantes contributos, em especial de reforço da prática da good governance através da auditoria pública e dos relatórios produzidos por esta, reforçando assim a cidadania.This paper aims to discuss the role of SAIs as public audit entities, and is contribution to good governance. From the various bibliographical studies carried out, it was found that good governance is considered as a good form of governance, based on public participation, transparency, accountability, respect, compliance with the law and meeting the needs of the population for social development. In view of the defined work objectives, an interview guide was produced and applied to a number of qualified interviewees which used public audit. Their opinions, experiences and insights were collected on how good governance occurs; how it is transparent and of much to guard against the risks of public activity and how much it allows the application of accountability today in Portugal. The public audit outcome will be to create public value and trust for an entire community. According to the reference literature and the interviewees, the public context audit plays a decisive role in the achievement of good governance. In addition, several international reference organizations (OECD, UN, IMF, World Bank, among others) pursue and foster good governance not only, but also through the reinforcement of public auditing practices and procedures, regarding the complementary role between the production of compliance audits and performance audits. From the interviews with the qualified actors in these matters, important contributions were obtained, in particular to reinforce the practice of good governance through public auditing and the reports produced by it, thus reinforcing citizenship.N/

Relations between the diffusion anomaly and cooperative rearranging regions in a hydrophobically nanoconfined water monolayer

We simulate liquid water between hydrophobic walls separated by 0.5 nm, to study how the diffusion constant D_\parallel parallel to the walls depends on the microscopic structure of water. At low temperature T, water diffusion can be associated with the number of defects in the hydrogen bonds network. However, the number of defects solely does not account for the peculiar diffusion of water, with maxima and minima along isotherms. Here, we calculate a relation that quantitatively reproduces the behavior of D_\parallel, focusing on the high-T regime. We clarify how the interplay between breaking of hydrogen bonds and cooperative rearranging regions of 1-nm size gives rise to the diffusion extrema, possibly relevant for both bulk and nanoconfined water.Comment: Published version; extended references, 5 pages, 3 figure

A zero-thickness mortar/ interface formulation with application to fracture mechanics

A zero-thickness mortar/interface element formulation is briefly described and demonstrated. This element may be considered as an extension of traditional zero-thickness interface element, in order to represent material interfaces located in between subdomains with non-matching FE meshes. In the context of small strain analysis, these elements may be equipped with the same type of constitutive laws as traditional interface elements. Therefore, if friction or fracture-mechanics-based laws are adopted, mortar/interface elements may be used to represent frictional sliding or cracking following the lines (surfaces) along which they have been pre-inserted. Two basic verification examples of this type are presented, showing that the model can correctly represent uniform states of stress and deformation when connecting unmatched mesh subdomains

An exploration of student mentoring to motivate and to enhance interactive learning in undergraduate engineering courses

Algunos de los objetivos establecidos por las directrices de la Universidad son la promoción de la tutoría entre pares, desarrollada principalmente entre estudiantes de cursos avanzados y estudiantes de primer año. Si bien es cierto que este tipo de experiencia se difunde ampliamente en las Facultades de Pedagogía y Psicología, su implementación limitada en las Escuelas de Ingeniería no es menos cierta. Esta comunicación describe la experiencia de tutoría que se ha llevado a cabo entre los estudiantes de pregrado de tercer y segundo año para mejorar los resultados académicos de los de segundo año en la asignatura de "Automatización", incluida en el programa del segundo curso de El Grado en Tecnología de Ingeniería Industrial, todo ello basado en la experiencia adquirida por los alumnos de tercer año. Para lograr este objetivo, los mentores de los estudiantes han utilizado herramientas en línea que ya podían manejar con habilidad, como MATLAB y SIMULINK, para el aprendizaje de conceptos fundamentales de la asignatura "Automatización". Para este propósito, han propuesto tareas de aprendizaje explicativas basadas en problemas sobre ejercicios tratados en clase, asesorando a sus compañeros supervisados ​​en la mejora de su propio aprendizaje y maximizando su potencial, para así obtener las competencias necesarias antes de la evaluación general. Los datos de una encuesta de estudiantes indican la opinión positiva de los estudiantes de pregrado sobre el proceso de tutoría. De hecho, la experiencia de la mentoría realizada ha llevado a una mejor adaptación del estudiante a la materia y le ha permitido al profesor conocer las dificultades en el manejo por parte de los estudiantes de las herramientas de aprendizaje en línea. También ha demostrado una mejora en las relaciones y la comunicación entre estudiantes y profesores gracias a la función de intermediación de los estudiantes mentores.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech