NTERDEPENDÊNCIA e Colaboração em Contextos Escolares Inclusivos

Esta pesquisa teve como objetivo principal analisar as inter-relações do professor de ensino comum e do professor especialista em Educação Especial em um contexto escolar de escolarização de estudantes em situação de deficiência intelectual, considerando a política educacional implementada no município de São Mateus/ESBRA. Sendo, nessas inter-relações, as interdependências e colaboração, foco de nossas análises. Tomamos como referência os pressupostos da Sociologia Figuracional, elaborada no conjunto das obras de Norbert Elias, considerando os conceitos e noções do processo civilizador, figurações e interdependências. No que se refere a políticas e práticas desenvolvidas na Educação Especial, numa perspectiva inclusiva, buscamos conhecer as produções da legislação e dos serviços ofertados pelo município. O nosso caminho metodológico perpassou pela pesquisa de natureza qualitativa, e nos baseamos na pesquisa-ação colaborativocrítico. Como instrumento de coleta de dados, utilizamos a observação, questionários semiestruturados e a construção de práticas colaborativas no contexto de uma escola que conta com a matrícula e presença de estudantes em situação de deficiência intelectual. Os principais apontamentos nos permitem reiterar que a implementação de práticas de colaboração entre os professores de ensino comum e o professor especialista, tendem repercutir positivamente na consecução de práticas pedagógicas e contribuir no processo de constituição de saberes docentes mais qualificados às demandas da escolarização de estudantes com deficiência intelectual. No estudo realizado, contudo, tanto a professora do ensino comum, quanto à professora especialista encontram-se numa dinâmica em que as ações ocorrem muito mais no âmbito individual, marcado por restritas iniciativas de constituir um movimento de (re) criação de oportunidades para construção de elos e práticas em benefício da escola como inclusiva. Constatamos que, salta aos olhos, a ausência de uma organização escolar que permita aos profissionais acima citados, e demais profissionais da escola, momentos que possam discutir para que possivelmente seja construído um espaço que conjugue a coletividade. Sendo o fator tempo justificado para tais ausências como um condicionante para a desqualificação da educação escolar. Reconhecemos ser esse um processo lento e complexo, tanto na figuração da escola, quanto no âmbito municipal, pois exigirá um movimento de permissão, em que cada indivíduo entre no jogo, permitindo assim mudar de posição, refazer caminhos, ora recuar, ora avançar, mas envolver-se com o jogo

CFD Simulations of Single- and Twin-Screw Machines with OpenFOAM

Over the last decade, Computational Fluid Dynamics (CFD) has been increasingly applied for the design and analysis of positive displacement machines employed in vapor compression and power generation applications. Particularly, single-screw and twin-screw machines have received attention from the researchers, leading to the development and application of increasingly efficient techniques for their numerical simulation. Modeling the operation of such machines including the dynamics of the compression (or expansion) process and the deforming working chambers is particularly challenging. The relative motion of the rotors and the variation of the gaps during machine operation are a few of the major numerical challenges towards the implementation of reliable CFD models. Moreover, evaluating the thermophysical properties of real gases represents an additional challenge to be addressed. Special care must be given to defining equation of states or generating tables and computing the thermodynamic properties. Among several CFD suite available, the open-source OpenFOAM tool OpenFOAM, is regarded as a reliable and accurate software for carrying out CFD analyses. In this paper, the dynamic meshing techniques available within the software as well as new libraries implemented for expanding the functionalities of the software are presented. The simulation of both a single-screw and a twin-screw machine is described and results are discussed. Specifically, for the single-screw expander case, the geometry will be released as open-access for the entire community. Besides, the real gas modeling possibilities implemented in the software will be described and the CoolProp thermophysical library integration will be presented

Full 3D numerical analysis of a twin screw compressor by employing open-source software

The push for having more reliable and efficient positive displacement machines (both compressors and expanders) for vapor compression and power generation (e.g., ORCs) applications has moved researchers to an always more spread employment of computational fluid dynamics (CFD). In particular, twin screw compressors, because of their high efficiency compared to other compressor types, have received interest over the last years. The numerical analysis of such machines is challenging: the deforming working chambers are very difficult to be correctly replicated. The relative motion of the rotors and the variation of the gaps during machine operation are few of the major difficulties in implementing reliable CFD models. A custom mesh generation algorithm is therefore often required for sumulating the machine operation. In this work, SCORG-V5.2.2 was used to generate the meshes of the deforming domain around rotating parts of the machines. The open-source software OpenFOAM-v1606+ is then employed to compute the flow field associated with the operation of the twin screw. The coupling of the two tools has been carried out in this work, applying the methodology to a twin screw machine

A QUALIDADE DE VIDA NO TRABALHO CORRELACIONADA À PRÁTICA DA GINÁSTICA LABORAL

A presente pesquisa propõe uma reflexão em torno da qualidade de vida no trabalho correlacionada à prática da ginástica laboral. Na reflexão teórica demonstrou-se que num contexto de competitividade, as organizações têm empreendido esforços com o propósito de se manterem estruturadas no mercado. A busca pela excelência do trabalho por parte do colaborador exige aspectos que viabilizem a execução de suas tarefas de forma adequada e que lhe favoreça qualidade de vida. É necessário extinguir quaisquer aspectos que interferem negativamente no interior da organização, gerando como conseqüências fatores inviáveis ao sucesso da instituição. A ginástica laboral favorece a melhoria das condições de trabalho, desencadeando aumento na produtividade. A pesquisa é classificada como um estudo de caso, descritivo, conduzido por uma abordagem quantitativa e qualitativa. Como procedimentos para coleta de dados foram aplicados questionário e entrevista. Os resultados apontaram que ao adotar a ginástica laboral a organização analisada tem se beneficiado, pelo fato de contribuir com um ambiente mais saudável, melhorando a qualidade de vida de seus colaboradores. Palavras-chave: qualidade de vida no trabalho, saúde ocupacional, ginástica labora

Numerical investigation of oil injection in a Roots blower operated as expander

The adoption of positive displacement machines as expanders in Organic Rankine Cycles (ORCs) is increasingly common, especially in the low to medium power range. At the same time, these devices often serve as compressor in Vapor-Compression Refrigeration Systems. In both cases, the application of Computation Fluid Dynamics (CFD) to optimize such machines has become an integrated tool in the design process. As a consequence, several challenges associated with the numerical simulation have to be taken into account. For example, the modeling of the gap represents a challenge for the stability of the numerical analysis. The dynamic of the process, combined with deformations of the clearances and of the working chamber has to be considered with extra care. To raise the efficiency of the machine, oil is typically injected. Its numerical modeling imply an extra challenge in the simulation of the actual operation of the machine. The present work is mainly focused on the multi-phase nature of the flow, with a particular analysis of the lubricant oil injected. In this work, a two-lobe Roots blower operated as expander has been simulated with the open-source software OpenFOAM-v1812, using the SCORG-V5.2.2. This analysis highlights the areas that are affected the most by the oil presence in order to highlight the sealing effect it provides

Drosophila Parkin requires PINK1 for mitochondrial translocation and ubiquitinates Mitofusin

Loss of the E3 ubiquitin ligase Parkin causes early onset Parkinson's disease, a neurodegenerative disorder of unknown etiology. Parkin has been linked to multiple cellular processes including protein degradation, mitochondrial homeostasis, and autophagy; however, its precise role in pathogenesis is unclear. Recent evidence suggests that Parkin is recruited to damaged mitochondria, possibly affecting mitochondrial fission and/or fusion, to mediate their autophagic turnover. The precise mechanism of recruitment and the ubiquitination target are unclear. Here we show in Drosophila cells that PINK1 is required to recruit Parkin to dysfunctional mitochondria and promote their degradation. Furthermore, PINK1 and Parkin mediate the ubiquitination of the profusion factor Mfn on the outer surface of mitochondria. Loss of Drosophila PINK1 or parkin causes an increase in Mfn abundance in vivo and concomitant elongation of mitochondria. These findings provide a molecular mechanism by which the PINK1/Parkin pathway affects mitochondrial fission/fusion as suggested by previous genetic interaction studies. We hypothesize that Mfn ubiquitination may provide a mechanism by which terminally damaged mitochondria are labeled and sequestered for degradation by autophagy

Australia and Other Nations are Failing to Meet Sedentary Behaviour Guidelines for Children: Implications and a Way Forward

BACKGROUND: Australia has joined a growing number of nations which have evaluated the physical activity and sedentary behaviour status of their children. Australia received a 'D minus' in the first Active Healthy Kids Australia Physical Activity Report Card. METHODS: An expert subgroup of the Australian Report Card Research Working Group iteratively reviewed available evidence to answer three questions: 1) What are the main sedentary behaviours of children?, 2) What are the potential mechanisms for sedentary behaviour to impact on child health and development? and, 3) What are the effects of different types of sedentary behaviours on child health and development? RESULTS: Neither sedentary time nor screen time are homogeneous activities likely to result in homogenous effects. There are several mechanisms by which various sedentary behaviours may positively or negatively affect cardiometabolic, neuro-musculoskeletal, and psycho-social health, though the strength of evidence varies. National surveillance systems, and mechanistic, longitudinal and experimental studies are needed for Australia and other nations to improve their grade. CONCLUSIONS: Despite limitations, available evidence is sufficiently convincing that the total exposure and pattern of exposure to sedentary behaviours are critical to the healthy growth, development and wellbeing of children. Nations therefore need strategies to address these common behaviours

Guidelines for the Selection of Physical Literacy Measures in Physical Education in Australia

Assessment of physical literacy poses a dilemma of what instrument to use. There is currently no guide regarding the suitability of common assessment approaches. The purpose of this brief communication is to provide a user's guide for selecting physical literacy assessment instruments appropriate for use in school physical education and sport settings. While recommendations regarding specific instruments are not provided, the guide offers information about key attributes and considerations for the use. A decision flow chart has been developed to assist teachers and affiliated school practitioners to select appropriate methods of assessing physical literacy. School PE and sport scenarios are presented to illustrate this process. It is important that practitioners are empowered to select the most appropriate instrument/s to suit their needs