EDUCAÇÃO PARA A DIVERSIDADE DAS LÍNGUAS-CULTURAS DO MUNDO NA EDUCAÇÃO INFANTIL: DESENVOLVENDO A COMPETÊNCIA TRANSCULTURAL

      Este artigo tem como objetivo refletir sobre a educação para a diversidade no processo de ensino-aprendizagem de línguas-culturas estrangeiras em contexto escolar. O texto traz considerações sobre a introdução do ensino precoce de línguas estrangeiras no intuito de aumentar quantitativamente o período de aprendizagem. Compreendendo a necessidade de aperfeiçoar as práticas docentes que visam o desenvolvimento das competências linguístico-culturais dos aprendizes, discutimos a reelaboração de uma abordagem das línguas estrangeiras modernas a partir do último ano da Educação Infantil embasada nas competências em produção-compreensão oral e transcultural através das contribuições teóricas de Hawkins, Blanchet, Candelier, Rispail e Clerc oriundas do campo teórico europeu da Sociodidática e do Despertar para as línguas-culturas (“Éveil aux langues”, 2003). Assim, uma Educação para a Diversidade na Educação Infantil aspira a uma competência global transcultural através da construção de atitudes positivas em relação à diferença para a aprendizagem da alteridade. &nbsp

Os guerreiros do imaginário: Entrevista de Abdellatif Chaouite com Patrick Chamoiseau

Tradução de uma entrevista com Patrick Chamoi­seau, por Abdellatif Chaouite realizada na ação « Fazer o mundo com o Outro », iniciada pela Maison des Passages (Lyon) no contexto do Contrato Urbano de Coesão Social, publicada no periódico Ecarts d'identité, Grenoble: n°112,  p. 25-34, junho, 2008

Design of a compliant positioning control using an inverse method

International audienceThe design of new system requires generally achieving different objectives. The choice of the right system and control architecture is crucial and they can be judiciously exploited. The proposed approach is dealing with the efficient use of a pneumatic cylinder controlled by two servovalves. The control objectives are independent position and stiffness tracking. A Bond graph approach gives, in a first step, a general methodology to check the accessibility of the specifications on energetic and dynamic criteria. Then a control algorithm issued from the flatness concept and the nonlinear control theory is developed. Simulation and experimental results illustrating the proposed principle are finally presented. Concerning the tracking performance, it is shown that the new strategy does not decrease tracking errors, or the static errors, or the standard deviation in term of position and velocity tracking. The performance of the stiffness control is finally illustrated in simulation

The Impact of Patient Infection Rate on Emergency Department Patient Flow: Hybrid Simulation Study in a Norwegian Case

The COVID-19 pandemic put emergency departments all over the world under severe and unprecedented distress. Previous methods of evaluating patient flow impact, such as in-situ simulation, tabletop studies, etc., in a rapidly evolving pandemic are prohibitively impractical, time-consuming, costly, and inflexible. For instance, it is challenging to study the patient flow in the emergency department under different infection rates and get insights using in-situ simulation and tabletop studies. Despite circumventing many of these challenges, the simulation modeling approach and hybrid agent-based modeling stand underutilized. This study investigates the impact of increased patient infection rate on the emergency department patient flow by using a developed hybrid agent-based simulation model. This study reports findings on the patient infection rate in different emergency department patient flow configurations. This study’s results quantify and demonstrate that an increase in patient infection rate will lead to an incremental deterioration of the patient flow metrics average length of stay and crowding within the emergency department, especially if the waiting functions are introduced. Along with other findings, it is concluded that waiting functions, including the waiting zone, make the single average length of stay an ineffective measure as it creates a multinomial distribution of several tendencies.publishedVersio

Control analysis of an electropneumatic actuator with full convection model: toward minimum energy actuation

International audienceToday it is no more reasonable to think that air is free. In order to increase energy efficiency, the control of electropneumatic actuator requires the energy balance in terms of air flow delivered by the power modulators to be optimized during tasks such as trajectory tracking. This paper tries to tackle two essential difficulties when dealing with pneumatic actuation. First, the modeling of the heat transfer phenomena in the cylinder chambers and second, control syntheses taking into account a realistic representation of the temperature dynamic. As a consequence, this approach enables to address properly the optimization of the overall actuation efficiency

An accurate tracking control of an electropneumatic actuator

International audienceSynopsis: Due to low cost, clean working environments, linear power transfer facilities and good performance, pneumatic systems play a significant role in industrial processes. During the last twenty years, the parallel development of pneumatic systems and control theory has lead to the implementation of modern control laws in pneumatic devices [Edge 1997]. The aim of this paper is to present and to compare experimental results for an electropneumatic positioning system. A classical linear control law with scheduling gains, established with the tangent linearized model, is compared with a more sophisticated nonlinear control law based on input-output linearization [Isidori 1989]. The tests are realised with two different admissible trajectories. The first one is a trajectory with a constant stage, which is usually used in robotic, to control painting system for example. The second one is a trajectory with constant acceleration and deceleration stages, often used for positioning systems which carry delicate loads or dangerous liquids in containers (as in the chemical industry). This choice of the trajectories has also to be related to a problem of sizing. The experimental results are presented in terms of repeatability for each control law implemented on the same device: an in line electropneumatic servo-drive. The statistical comparisons between nonlinear and linear control laws are shown in terms of static error: mean value, standard deviation value, minimum and maximum values. The precision and the repeatability are deduced from these results. All these indicators are also processed during the dynamical stage. The customer for choosing an appropriate control law for its desired specifications may use all these results

Adaptive Higher Order Sliding Modes for Two-Dimensional Derivative Estimation

International audienceIn this paper, some recent technical of the derivatives noisy transient signals estimation is extended to the two-dimensional case. This technique, which called higher order sliding modes is mostly used in the synthesis of robust controllers and is also shown a good results in the synthesis of the rth order robust dierentiators. In this work, such dierentiators are used as an edge detection method into image application. The proposed algorithm use an adaptive mechanism for tuning up its parameters in real time, in order to increase the efficiency of basic scheme. Some comparative study with a conventional methods of edge detection is performed

Nonlinear force tracking control of electrohydrostatic actuators submitted to motion disturbances

In some industrial fields, such as aerospace, electro-hydrostatic actuators (EHAs) are increasingly used to replace conventional standard hydraulic actuators due to their better energy performance. Moreover, implementing different type or technology of actuators in redundant actuation systems working on the same moving part introduced some new challenges. This paper presents a force-tracking controller for an asymmetric electro-hydrostatic actuator that is submitted to an external motion generated by an external source. In this case, the rod displacement is considered as an external disturbance for the hydraulic cylinder, but it is assumed that this disturbance can be easily measured using sensors. The theoretical motivation of this work is discussed along and a variable gain state feedback control based on Linear Parameter Varying control (LPV) theory is proposed to achieve stability, disturbance rejection and tracking performance. The Linear Matrix Inequalities (LMI) framework is used to determine a control law including an augmented state feedback with an integral action that reduces trajectory-tracking errors. Simulation results of the control law are finally given to verify the global performance of this control design

Assessment of the susceptibility to pests and diseases of 36 apple cultivars in four low-input organic orchards in France

One of the keystones of the organic orchard is the cultivar choice as one element of pest and disease control. However, few exhaustive data sets concerning the cultivar susceptibility to pests and diseases are available for growers. In order to identify cultivars adapted to organic production methods, the susceptibility to scab, aphids and powdery mildew and the agronomic properties of 36 cultivars were assessed in four French sites under different pedo-climatic conditions. Different levels of susceptibility to scab were observed for 23 scab Vf-resistant and 13 other cultivars. In the North of France where Vf resistance is overcome, the Vf cultivars displayed different levels of scab severity. A high variability in the susceptibility to aphids was observed whereas susceptibility to powdery mildew varied less. The analysis of susceptibility properties, yield and fruit quality, fruit storability and tree behaviour permitted to identify a set of interesting cultivars according to the site