New methodology to measure the dynamics of ocular wave front aberrations during small amplitude changes of accommodation

We present a methodology to measure the systematic changes of aberrations induced by small changes in amplitude of accommodation. We use a method similar the one used in electrophysiology, where a periodic stimulus is presented to the eye and many periods (epochs) of the stimulus are averaged. Using this technique we have measured changes in higher order aberrations from 0.006μm to 0.02μm and correlated them with amplitude changes of accommodation as small as 0.14D. These small changes would have been undetectable without epoch averaging. The correlation coefficients of Zernike terms with defocus were calculated, demonstrating higher values of correlation for epoch averaging. The accurate monitoring of defocus at the start of the accommodation response has shown some interesting trends that may be related with the mechanisms behind accommodation

Tan spot disease of wheat: race characterization.

bitstream/CNPT-2010/40702/1/p-do84.pd

Some empirical evidence on business-IT alignment processes in the public sector: A case study report

An empirical study that explores business-IT alignment processes in a networked organization among the province Overijssel, the municipalities Zwolle and Enschede, the water board district Regge & Dinkel and Royal Grolsch N.V. in The Netherlands, is summarized in this report. The aim of the study was to identify processes that contribute to improve such alignment. This study represents a continuation of previous validation efforts that help us to confirm the business-IT alignment process areas that should ultimately be included in the ICoNOs MM. Evidence was sought for the alignment of business and IT through the use of information systems to support the requirements of the organization in a specific project. The results of this study in the public sector also are relevant to the private sector where (i) business-IT alignment plays an increasingly valuable role, and (ii) the characteristics of collaborative networked organizations are present

Avaliação da freqüência de Lasiodiplodia theobromae em plantas cítricas com sintomas típicos de descamamento eruptivo.

O fungo Lasiodiplodia theobromae (Pat.) Griffon & Maubl., é um patógeno comumente encontrado nas regiões tropicais e subtropicais. Capaz de infectar tecidos vegetais, isoladamente ou em associação com outros patógenos, pode causar sérios prejuízos a numerosas espécies cultivadas.Em paralelo aconteceram também os seguintes eventos: V Seminário de Pesquisa do Recôncavo da Bahia; V Seminário Estudantil de Pesquisa da UFRB; V Seminário da Pós-Graduação da UFRB; II Seminário Regional de Pesquisa da EBDA; 5ª Jornada Científica da Embrapa Mandioca e Fruticultura; VIII Seminário Estudantil de Pesquisa e Extensão da FAMAM; Semana de Ciência, Tecnologia e Inovação no Agronegócio; Fórum de Gestores de Iniciação Científica e Tecnológica da Bahia; II Simpósio Baiano de Defesa Agropecuária; I Semana de Educação Tutorial da UFRB

Junctional sarcoplasmic reticulum motility in adult mouse ventricular myocytes.

Excitation-contraction (EC) coupling is the coordinated process by which an action potential triggers cardiac myocyte contraction. EC coupling is initiated in dyads where the junctional sarcoplasmic reticulum (jSR) is in tight proximity to the sarcolemma of cardiac myocytes. Existing models of EC coupling critically depend on dyad stability to ensure the fidelity and strength of EC coupling, where even small variations in ryanodine receptor channel and voltage-gated calcium channel-α 1.2 subunit separation dramatically alter EC coupling. However, dyadic motility has never been studied. Here, we developed a novel strategy to track specific jSR units in dissociated adult ventricular myocytes using photoactivatable fluorescent proteins. We found that the jSR is not static. Instead, we observed dynamic formation and dissolution of multiple dyadic junctions regulated by the microtubule-associated molecular motors kinesin-1 and dynein. Our data support a model where reproducibility of EC coupling results from the activation of a temporally averaged number of SR Ca2+ release units forming and dissolving SR-sarcolemmal junctions. These findings challenge the long-held view that the jSR is an immobile structure and provide insights into the mechanisms underlying its motility

An unpublished interview with Paulo Freire: radical pedagogy & social transformation

Pulling together the inedited works by Paulo Freire in the XXI century shows us how his works are up-to-date with current issues in the field. Most of his works have been disseminated all over the World, as those of the greatest educator of all times; however, his simplicity and outspoken voice is unique and cannot be reproduce in a simple manner. This is possibly why many writers use his citations, instead of paraphrasing his writings. Therefore, this paper represents another attempt to focus on his own voice and perspective on some of the questions raised by students three decades ago, that had never reach a broad audience but are nevertheless still in the minds of many students who are today interested in his work. The paper presents a short unpublished interview with Freire in 1988, when he talks about theoretical affiliation, critiques and the objectives of his works. In a conversation format the interview is a re-encounter between Paulo Freire and his former student Carmen de Mattos

Mancha amarela do trigo: caracterização de raças.

bitstream/CNPT-2010/40701/1/p-do83.pd

Enseñanza de Física en el nivel medio : probables estrategias didácticas innovadoras

La dificultad en el aprendizaje de Física es ampliamente conocida en distintos contextos. Ella influye en la eficacia escolar y pone en tela de juicio la calidad educativa de los centros. En este trabajo se describe el estado de avance de una investigación llevada a cabo en IFBA. En la primera etapa de diagnóstico se diseñaron y validaron instrumentos de recolección de información los cuales se aplicaron y están en procesamiento de datos. El producto esperado de esta etapa es una evaluación institucional que evidencie la imagen de la institución respecto a la Física y su enseñanza. En una segunda parte se diseñó e implementó una secuencia didáctica innovadora, sustentada en teorías e investigaciones actuales desarrolladas en el ámbito de didáctica de las ciencias. En ella se está trabajando con dos grupos de estudiantes, uno experimental y otro control. De esta instancia se pretenden obtener conclusiones que evidencien una posible mejora en los resultados del aprendizaje de la Física a partir de modificaciones en las estrategias de enseñanza. La última parte corresponde a la autoevaluación de la propia práctica docente, en esta etapa se validará la secuencia diseñada y su implementación con los instrumentos construidos por el Dr. Godino.A dificuldade na aprendizagem de Física é amplamente conhecida em diferentes contextos. Ela influencia na eficácia escolar e expõe a qualidade educativa dos centros. Neste trabalho se descreve o atual estágio de uma pesquisa que se realiza no IFBA. Na primeira etapa do diagnóstico foram desenhados e validados os instrumentos de recolecção da informação, os quais foram aplicados e estão em processamento de dados. O produto esperado desta etapa é uma avaliação institucional que evidencie a imagem da instituição com respeito à Física y seu ensino. Na segunda parte se elaborou e executou uma sequencia didática inovadora, sustentada em teorias e investigações atuais desenvolvidas no âmbito da didática das ciências. Nela, se está trabalhando com dois grupos de estudantes, um experimental e outro de controle. Desta instancia se pretende obter conclusões que consigam evidenciar uma possível melhora nos resultados da aprendizagem de Física a partir de modificações nas estratégias de ensino. A última parte corresponde à autoavaliação da própria prática docente, e nesta etapa será validada a sequencia desenhada e a sua execução com os instrumentos construídos pelo Dr. Godino da Universidade de Granada