A Cyclic Distributed Garbage Collector for Network Objects

This paper presents an algorithm for distributed garbage collection and outlines its implementation within the Network Objects system. The algorithm is based on a reference listing scheme, which is augmented by partial tracing in order to collect distributed garbage cycles. Processes may be dynamically organised into groups, according to appropriate heuristics, to reclaim distributed garbage cycles. The algorithm places no overhead on local collectors and suspends local mutators only briefly. Partial tracing of the distributed graph involves only objects thought to be part of a garbage cycle: no collaboration with other processes is required. The algorithm offers considerable flexibility, allowing expediency and fault-tolerance to be traded against completeness

Pequena Crónica sobre notas de rodapé na Educação Musical: Reflexões a propósito da teoria da aprendizagem musical

Os trabalhos e ideias de Edwin Gordon, investigador americano a quem se devem alguns dos maiores contributos no âmbito da Psicologia da Música e da Pedagogia Musical da actualidade, têm suscitado um enorme interesse no panorama da Educação Musical portuguesa. As suas investigações no âmbito da avaliação da aptidão e do desempenho musical, a sua teoria da aprendizagem musical, e muito especialmente o que propõe como orientações musicais para recém-nascidos e crianças em idade pré-escolar têm tido um enorme eco no nosso país

Música, Chocolate para os Ouvidos. Elementos para uma reflexão sobre filosofia do ensino da Música

Divirto-me quando em relação à necessidade da Educação Musical no sistema educativo se invoca o mistério da purificação: o Santo Nome da Música surge, messiânico, num ritual ébrio de neblina e discurso político disfarçado de educativo (ou, se calhar, sem disfarce, dada a coincidência entre ambos). Erguem-se as mãos e clamam-se orações que dizem ser a educação musical muito importante, pois ajuda à socialização das crianças, ao desenvolvimento do raciocínio matemático, da inteligência, da criatividade, do sentido estético, da interdisciplinaridade, da maturidade psicológica, etc, etc

Parametric identification of the dynamics of inter-sectoral balance: modelling and forecasting

This work is devoted to modelling and identification of the dynamics of the inter-sectoral balance of a macroeconomic system. An approach to the problem of specification and identification of a weakly formalized dynamical system is developed. A matching procedure for parameters of a linear stationary Cauchy problem with a decomposition of its upshot trend and a periodic component, is proposed. Moreover, an approach for detection of significant harmonic waves, which are inherent to real macroeconomic dynamical systems, is developed.Comment: This is a preprint of a paper accepted for publication 29-March-2019 as a book chapter in 'Advances in Intelligent Systems and Computing' [https://www.springer.com/series/11156], Springe

The impact of structural capital on the firm Innovativeness, the Galician Northern Portugal automotive industries reality

The intellectual capital is increasingly considered a major issue on the management and organization research and a source of competitive advantage. Although there are different models and approaches that try to identify the effect of intellectual capital on firm performance, there’s, also a lack of evidence and consensus. Based on that evidence, this paper focuses on the influence of the structural capital on the product- process and management innovativeness of the firm. A global model including the variables used in the previous literature is used and we establishes hypotheses for testing this model and use statistic technique to estimate the parameters of the model in a sample. To do so, we use a survey from 68 firms working on the auto components sector, established in the Northern Spain and Northern Portugal. We found firstly, that innovativeness has two main dimensions, perfectly differentiated, the product-process innovation and the management innovation; secondly that the structural capital dimensions influences differently each type of innovation capacity (innovativeness). We also concluded that the structural capital of the automotive firms based on the euro region Galicia (Spain) Northern Portugal influences positive and directly the management innovativeness. These results highlight the importance of the structural capital as well as highlight the main dimensions that influence the innovativeness, and more broadly, the value of intellectual capital as a competitive advantage in contemporary time. Moreover, point out the different character of product-process and management innovativeness.

A utilização do geoplano no ensino e aprendizagem da geometria. Uma experiência com alunos do 4.º ano do Ensino Básico

O presente artigo retrata parte de uma investigação levada a cabo numa turma de 4.º ano do 1.º ciclo do ensino básico, a propósito da utilização de materiais manipuláveis no ensino e aprendizagem da matemática. Esta investigação, de caráter qualitativo, foi desenvolvida segundo algumas caraterísticas da metodologia de investigação-ação. Ao longo do artigo apresenta-se os resultados obtidos em duas sessões concretizadas em torno dos conceitos de área e perímetro com recurso ao geoplano. A análise das sessões em causa terá por base as seguintes questões de investigação: Como foi utilizado o geoplano ao longo da realização das atividades propostas? Quais as dificuldades sentidas pelos alunos quando resolviam a tarefa com recurso ao geoplano? De um modo geral, a utilização do geoplano funcionou como uma base concreta e dinâmica para a (re)construção dos conceitos de área e perímetro, assim como para o desenvolvimento de capacidades de visualização espacial. As dificuldades mais notórias foram na transferência das figuras do geoplano para o papel ponteado e vice-versa, na distinção entre os comprimentos do lado e da diagonal de um quadrado formado no geoplano, bem como na determinação das medidas dos lados de uma figura como sendo a distância entre os pregos do geoplano.Este trabalho é financiado por Fundos FEDER através do Programa Operacional Factores de Competitividade – COMPETE e por Fundos Nacionais através da FCT-Fundação para a Ciência e a Tecnologia no âmbito do projeto “FCOMP-01-0124-FEDER-041405 (Ref. FCT, EXPL/MHCCED/0645/2013)”.info:eu-repo/semantics/publishedVersio

A Journey Inside Ourselves and What We Found When We Arrived

UIDB/00693/2020 UIDP/00693/2020This article analyses and reflects upon a community music project that occurred in 2016 in Portugal. It involved a community of people with disabilities and a group of artists from different fields. The project’s promotors aimed to create a space in which differences were abated, social well-being was nourished and individual desires were fostered. This article endeavours to understand how artistic performance may provide opportunities for empowering less advantaged people and how it might have been achieved during this project. The reflections present in this article are based on the current literature on community music and are informed by other similar analysis of these kinds of projects. The article starts with a brief description of the project and then elaborates on the term ‘community music’ and its relationship to this project. The project made use of a mix between an art installation and an experimental instrument called Pianoscópio. This article describes this instrument in detail and analyses how it enabled the participants to express themselves to their fullest abilities. A characterisation of the participating community members follows, focusing on the core tenets of the association they were part of. After that, the article examines how the workshops took place and what transpired in the final performance, focusing specifically on the steps taken to accommodate the different disabilities of the participants. The article ends with a reflection upon these kinds of projects and the impact this one project might have had on its participants.publishersversionpublishe

Optimal control of a dengue epidemic model with vaccination

We present a SIR+ASI epidemic model to describe the interaction between human and dengue fever mosquito populations. A control strategy in the form of vaccination, to decrease the number of infected individuals, is used. An optimal control approach is applied in order to find the best way to fight the disease.Comment: This is a preprint of a paper accepted for presentation at ICNAAM 2011, Halkidiki, Greece, 19-25 September 2011, and to appear in AIP Conference Proceedings, volume 138

Modeling and Optimal Control Applied to a Vector Borne Disease

A model with six mutually-exclusive compartments related to Dengue disease is presented. In this model there are three vector control tools: insecticides (larvicide and adulticide) and mechanical control. The problem is studied using an Optimal Control (OC) approach. The human data for the model is based on the Cape Verde Dengue outbreak. Some control measures are simulated and their consequences analyzed