Neste trabalho socializar-se-ão a idealização e a construção de experimentos portáteis planejados para alargar a aprendizagem no campo das Ciências da Natureza. Descrever-se-á detalhadamente uma sequência didática para a aplicação do Experimento Portátil (ExP) sobre as leis da óptica geométrica, desenvolvida a partir de orientações psicopedagógicas de Freire, Vygostky, Ausubel e Moreira. Os experimentos portáteis foram produzidos a partir de pesquisa relacionada com os estudos da metodologia para o ensino de física recorrendo à metodologia ISLE. Tais produtos podem ser montados e manuseados na sala de aula, em aulas presenciais ou online, se constituindo em experimentos pedagógicos que podem auxiliar assertivamente professores de ciências e de matemática no contexto do ensino remoto, motivado pela pandemia da COVID-19. Esta nova ferramenta se afirmou como uma solução assertiva para o ensino de ciências e de matemática experimental no período da pandemia, contexto em que as aulas remotas ou gravadas se constituíram na alternativa possível para mitigar aglomerações, principalmente, porque a partir da mediação do produto pedagógico, sobre as leis da óptica geométrica, as aprendizagens se tornaram potentes, mesmo que os estudantes se encontrassem distantes da infraestrutura laboratorial das instituições de ensino que o adotaram no seu repertório metodológico.

We will socialize the design and how to make of portable experiments to broaden learning in the field of Natural Sciences. We will describe in detail the application of the Portable Experiment (ExP) on the laws of geometric optics developed from psychopedagogical prescription of Freire, Vygostky, Ausubel and Moreira. The ExP were created from research initially related to the studies of the methodology for teaching physics using the ISLE (Investigative Science Learning Environment) methodology. Such products can be assembled and handled in the classroom or in the context of student’s homes, in classroom or online classes, constituting pedagogical experiments that can assertively help science and mathematics teachers in the context of remote education motivated by the COVID pandemic-19. This new instrument asserted itself as an assertive solution for the teaching of science and experimental mathematics in the period of the pandemic, where remote or recorded classes constituted the possible alternative to mitigate crowding, mainly because from the mediation of the pedagogical product the learning became powerful even though students were far from the laboratory infrastructure of educational institutions that adopted it in their methodological repertoire.

A aderência entre o aço e o concreto é fundamental para a existência das estruturas de concreto armado, uma vez que os dois materiais atuamem conjunto para absorver os esforços solicitantes. O fenômeno da aderência é considerado complexo no que se refere aos vários fatores queo influenciam. Vários tipos de ensaios de aderência foram propostos ao longo dos anos. Um deles é a proposta modificada do ensaio de arrancamento pull-out-test, que foi elaborada por Lorrain e Barbosa [1] denominado de ensaio APULOT (Appropriete Pull-Out-Test). Com basenos resultados experimentais obtidos por Vale Silva [2] para os ensaios pull-out convencionais e para o ensaio pull-out modificado, APULOT,procura-se conhecer o comportamento numérico da aderência aço-concreto através de uma simulação numérica utilizando um código decálculo chamado ATENA que é baseado no Método dos Elementos Finitos (MEF). A simulação numérica permitiu melhor avaliar a fissuraçãoe a distribuição de tensões que ocorre durante o ensaio de arrancamento, tornando-se com isso, uma ferramenta de apoio preciosa ao projeto experimental que visa à validação, validação parcial, ou não recomendação do ensaio de aderência aço-concreto modificado - EnsaioAPULOT - como ensaio de controle de qualidade do concreto armado. Os resultados numéricos obtidos apresentaram boa representatividadequando comparados aos resultados experimentais.

The bond between steel and concrete is essential for the existence of reinforced concrete structures, as both materials act together to absorb structural strain. The bond phenomenon is considered to be complex regarding many factors that affect it. Several types of bond tests have been proposed over years. One is the modified proposed of pull-out test, which was elaborated by Lorrain and Barbosa [1] called APULOT test (Appropriete pull-out-test). Based on experimental results obtained by Vale Silva[2] either by conventional pull-out tests, or by modified pull-out test, APULOT, seeks to know the numeric behavior of bond steel-concrete through a numerical simulation using a calculation code ATENA which is based on the Finite Element Method (FEM). The numerical simulation provided better evaluate the stress distribution and cracking that occurs during the test, thereby becoming a valuable tool to support the experimental project that aims to validation, validation partially or not recommend the modified bond test steel-concrete - APULOT test - as quality control test of structural concrete. The numerical results showed good representation compared to experimental results.

The aim of this study was to analyze the thickness of the intima-media complex (IMC) using a noninvasive method. The carotid and femoral common arteries were evaluated by noninvasive B-mode ultrasound in 63 normotensive and in 52 hypertensive subjects and the thickness of the IMC was tested for correlation with blood pressure, cardiac structures and several clinical and biological parameters. The IMC was thicker in hypertensive than in normotensive subjects (0.67 ± 0.13 and 0.62 ± 0.16 vs 0.54 ± 0.09 and 0.52 ± 0.11 mm, respectively, P<0.0001). In normotensive patients, the simple linear regression showed significant correlations between IMC and age, body mass index and 24-h systolic blood pressure for both the carotid and femoral arteries. In hypertensives the carotid IMC was correlated with age and 24-h systolic blood pressure while femoral IMC was correlated only with 24-h diastolic blood pressure. Forward stepwise regression showed that age, body mass index and 24-h systolic blood pressure influenced the carotid IMC relationship (r2 = 0.39) in normotensives. On the other hand, the femoral IMC relationship was influenced by 24-h systolic blood pressure and age (r2 = 0.40). In hypertensives, age and 24-h systolic blood pressure were the most important determinants of carotid IMC (r2 = 0.37), while femoral IMC was influenced only by 24-h diastolic blood pressure (r2 = 0.10). There was an association between carotid IMC and echocardiographic findings in normotensives, while in hypertensives only the left posterior wall and interventricular septum were associated with femoral IMC. We conclude that age and blood pressure influence the intima-media thickness, while echocardiographic changes are associated with the IMC.