1,483 research outputs found

    A strategic, process-oriented approach for an ESP reading course in the humanities

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    This paper aims at describing pedagogical materials especially designed for an ESP (English for Specific Purposes) course for undergraduate students in the Humanities and Social Sciences (mainly majoring in Education, History, and Geography) at a national public university in Argentina. It expands on the rationale behind the methodology and its practical application. The lessons in the manual seek to transfer to practical application theories based on the latest findings in reading, cognitive psychology and educational psychology. The contribution of the learner's systemic knowledge, exploited in cross-reference with their schematic knowledge, plus the application of metacognitive and monitoring strategies have been our guidelines for the design of the activities. Since our main aim is to facilitate the learners’ interpretation of texts while simultaneously improving their language skills, we base our approach on systemic functional grammar. Each lesson we teach addresses questions aimed at unveiling the ideational, interpersonal, and textual meanings of the reading texts that we use as didactic units

    O zodíaco numa proposta histórica e pedagógica

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    Este artigo tem como objetivo apresentar elementos históricos que permitam ao leitor compreender o papel que as constelações do zodíaco tiveram e ainda têm na Astronomia, e como elas estão associadas aos signos. A partir disso, propusemos um modelo pedagógico que pode ser usado em sala de aula para explicar como tais constelações estão organizadas, e de que forma as mudanças associadas a elas ocorrem no decorrer dos anos.This article aims at presenting historical elements that allow the reader to understand the role that the zodiac constellations has had in Astronomy, and how they are associated with signs. Henceforth, we propose a pedagogical model that can be used in classroom in order to explain how these constellations are organized, and how the changes correlated to them occur over the yearsFil: Longhini, Marcos Daniel.Fil: Gangui, Alejandro. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin

    Atividades de ensino em Astronomia a partir de elementos da História da Ciência: o caso do movimento retrógrado de Marte

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    Neste artigo são discutidos alguns aspectos da História da Astronomia, com foco na questão dos modelos Geocêntrico e Heliocêntrico de Cosmo e nos embates em torno do movimento anômalo de Marte. A partir de tais discussões, propomos a construção de um material didático, empregando recursos de baixo custo, com o qual é possível trabalhar tais aspectos históricos com alunos, em sala de aula. || O conhecimento, que se pode considerar como uma construção elaborada pelos mais diversos pesquisadores no decorrer dos tempos, apresenta duas facetas básicas: ele é, ao mesmo tempo, produto e processo. Quando entendido como "produto", encerra uma visão estática, acumulativa, que encobre a realidade conflituosa, resumindo-se num conjunto de informações neutras, lógicas e impessoais sobre a investigação da realidade. Quando é visto como "processo", é dinâmico, traz controvérsias, divergências e interesses, que trazem à tona seu caráter de não neutralidade; ele é a própria vivência, é o provisório e inacabado. O que se tem presenciado, atualmente, em situações de sala de aula, é um distanciamento do ensino da Ciência "processo" em relação à Ciência "produto". Rompendo com tal situação, acreditamos que a História da Ciência (HC), torna-se uma ferramenta útil na busca de alternativas. Ensinar a partir de elementos da HC propicia ir além da aprendizagem de conteúdos isolados, pois compreendem-se também os processos de produção do conhecimento, indo além da visão de Ciência como um dogma inquestionável.Fil: Longhini, Marcos Daniel. Universidade Federal de Uberlândia; BrasilFil: Gangui, Alejandro. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentin

    A localização espacial e geográfica de alunos de ensino médio : uma investigação envolvendo o ensino de Astronomia

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    Trata-se de um estudo com enfoque na orientação espacial e geográfica de alunos de Ensino Médio de uma escola pública brasileira, tomando por base uma atividade didática que envolveu elementos astronômicos. Basicamente, tal atividade tomou como eixo central a marcação da trajetória do Sol, a partir da escola, e estabeleceu relações entre tal trajetória, os lados cardeais e sua localização num mapa do município. A partir de duas entrevistas, que ocorreram no início e no final do trabalho, identificamos as principais formas de se orientar que os alunos empregam, e analisamos a viabilidade de um trabalho desta natureza na construção, pelos alunos, de um sistema de referência mais próximo ao real

    <Contributed Talk 24>Heteroclinic Cycles in Coupled Systems with Applications to Sensor Devices

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    [Date] November 28 (Mon) - December 2 (Fri), 2011: [Place] Kyoto University Clock Tower Centennial Hall, Kyoto, JAPA

    Development of 2D Bi-SQUID Arrays with High Linearity

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    We develop a two-dimensional (2D) Superconducting Quantum Interference Filter (SQIF) array based on recently introduced high-linearity tri-junction bi-SQUIDs. Our bi-SQUID SQIF array design is based on a tight integration of individual bi- SQUID cells sharing inductances with adjacent cells. We provide extensive computer simulations, analysis and experimental measurements, in which we explore the phase dynamics and linearity of the array voltage response. The non-uniformity in inductances of the bi-SQUIDs produces a pronounced zero-field single antipeak in the voltage response. The anti-peak linearity and size can be optimized by varying the critical current of the additional junction of each bi-SQUID. The layout implementation of the tight 2D array integration leads to a distinct geometrical diamond shape formed by the merged dual bi-SQUID cells. Different size 2D arrays are fabricated using standard HYPRES niobium 4.5 kA/cm2 fabrication process. The measured linearity, power gain, and noise properties will be analyzed for different array sizes and the results will be compared with circuit simulations. We will discuss a design approach for the electrically small magnetic field antenna and low-noise amplifiers with high bandwidth based on these 2D bi-SQUID SQIF arrays. The results from this work will be used to design chips densely and completely covered in bi-SQUIDs that has optimized parameters such as linearity and power gain.Comment: 9 pages, 13 figures, Applied Superconductivity Conference (ASC'12

    Estimating Mean Pulmonary Wedge Pressure in Patients With Chronic Atrial Fibrillation From Transthoracic Doppler Indexes of Mitral and Pulmonary Venous Flow Velocity

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    AbstractObjectives. We sought to obtain a noninvasive estimation of mean pulmonary wedge pressure (MPWP) in patients with chronic atrial fibrillation (AF).Background. It has previously been demonstrated that MPWP can be reliably estimated from Doppler indexes of mitral and pulmonary venous flow (PVF) in patients with sinus rhythm. Doppler estimation of MPWP has not been validated in patients with AF.Methods. MPWP was correlated with variables of mitral and pulmonary venous flow velocity as assessed by Doppler transthoracic echocardiography in 35 consecutive patients. The derived algorithm was prospectively tested in 23 additional patients.Results. In all patients the mitral flow pattern showed only a diastolic forward component. A significant but relatively weak correlation (r = −0.50) was observed between MPWP and mitral deceleration time. In 12 (34%) of 35 patients, the pulmonary vein flow tracing demonstrated only a diastolic forward component; a diastolic and late systolic forward flow was noted in the remaining 23 patients (66%). A strong negative correlation was observed between MPWP and the normalized duration of the diastolic flow (r = −0.80) and its initial deceleration slope time (r = −0.91). Deceleration time >220 ms predicted MPWP ≤12 mm Hg with 100% sensitivity and 100% specificity. When estimating MPWP by using the equation MPWP= −94.261 PVF deceleration time− 9.831 Interval QRS to onset of diastolic PVF− 16.337 Duration of PVF+ 44.261, the measured and predicted MPWP closely agreed with a mean difference of −0.85 mm Hg. The 95% confidence limits were 4.8 and −6.1 mm Hg.Conclusions. In patients with chronic AF, MPWP can be estimated from transthoracic Doppler study of PVF velocity signals.(J Am Coll Cardiol 1997;30:19–26

    CXCR7 Is Highly Expressed in Acute Lymphoblastic Leukemia and Potentiates CXCR4 Response to CXCL12

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    Recently, a novel CXCL12-binding receptor, has been identified. This CXCL12-binding receptor commonly known as CXCR7 (CXC chemokine receptor 7), has lately, based on a novel nomenclature, has received the name ACKR3 (atypical chemokine receptor 3). in this study, we aimed to investigate the expression of CXCR7 in leukemic cells, as well as its participation in CXCL12 response. Interesting, we clearly demonstrated that CXCR7 is highly expressed in acute lymphoid leukemic cells compared with myeloid or normal hematopoietic cells and that CXCR7 contributed to T-acute lymphoid leukemic cell migration induced by CXCL12. Moreover, we showed that the cellular location of CXCR7 varied among T-lymphoid cells and this finding may be related to their migration capacity. Finally, we hypothesized that CXCR7 potentiates CXCR4 response and may contribute to the maintenance of leukemia by initiating cell recruitment to bone marrow niches that were once occupied by normal hematopoietic stem cells.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)INCT-SangueUniv Estadual Campinas, Ctr Hematol & Hemoterapia, São Paulo, BrazilUniversidade Federal de São Paulo, Dept Ciencias Biol, São Paulo, BrazilUniversidade Federal de São Paulo, Dept Ciencias Biol, São Paulo, BrazilWeb of Scienc
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