Bandwidth requirements for shallow, high-resolution seismic reflection

The optimum bandwidth for shallow, high-resolution seismic reflection differs from that required for conventional petroleum reflection. An understanding of this issue is essential for correct choice of acquisition instrumentation. Numerical modelling of simple Bowen Basin coal structures illustrates that, for high-resolution imaging, it is important to accurately record all frequencies up to the limit imposed by earth scattering. On the contrary, the seismic image is much less dependent on frequencies at the lower end of the spectrum. These quantitative observations support the use of specialised high-frequency geophones for high-resolution seismic imaging. Synthetic seismic inversion trials demonstrate that, irrespective of the bandwidth of the seismic data, additional low-frequency impedance control is essential for accurate inversion. Inversion provides no compelling argument for the use of conventional petroleum geophones in the high-resolution arena.

COMPETÊNCIAS LEITORAS E ESCRITORAS NA EDUCAÇÃO BÁSICA DE SÃO PAULO, CIDADANIA E IDEOLOGIA: UMA ABORDAGEM HISTÓRICO-POLÍTICA EXPLORATÓRIA

Esta pesquisa de pós-graduação em nível de Mestrado em Educação, pela Universidade Metodista de São Paulo, esforça-se em promover uma reflexão acerca das políticas públicas, desde a Constituição do Império em 1824 até a Constituição de 1988, que impediram o analfabeto de votar em relação com as políticas educacionais que propunham erradicar o analfabetismo no país, analisando, como um caso específico, a ideologia do trabalho por competências na rede pública estadual de São Paulo. A base conceitual-analítica é dada por teorias marxistas francesas contemporâneas, em particular de Althusser, com relação ao Aparelho Ideológico de Estado e estudos de Baudelot e Establet, tendo como hipótese que a escola pública operou e ainda opera em função dos interesses burgueses de produção. Está dividida em cinco capítulos, estruturalmente adequadas da seguinte forma: Introdução que apresenta o referencial teórico usado para a construção da reflexão proposta, à luz dos estudos de Althusser, Baudelot e Establet e Saes; os capítulos 1 e 2 trazem o esforço da busca histórica e legal das Constituições Brasileiras, do Império até 1988, trazendo sempre um breve histórico das épocas em que elas foram promulgadas, a fim de subsidiar o estudo e apresentar que a proibição do voto do analfabeto sempre esteve presente nas constituições, até 1985 com a Emenda Constitucional que declarava o voto do analfabeto como facultativo , sempre atrelado à situação de competências leitoras e escritoras para o exercício pleno da cidadania; o terceiro capítulo apresenta o levantamento histórico sobre os dados de analfabetismo no Brasil desde os anos de 1900 até o último dado do IBGE nos anos 2000, trazendo um referencial explicativo baseado nos estudos de história da educação de ROMANELLI e na tese de doutoramento do professor da USP, Celso de Rui Beisiegel, o que possibilitou traçar um panorama das políticas públicas da educação consoantes aos acontecimentos políticos e históricos; o quarto capítulo apresenta a Proposta Curricular do Estado de São Paulo (SEE/SP, 2008), possibilitando um breve panorama sobre essa política pública de educação na referida rede e o quinto capítulo apresenta uma reflexão das teorias e dados apresentados, no esforço de refletir a situação do ensino por competências, no caso o das leitoras e escritoras, sempre presentes no enfoque social e econômico do país com um olhar crítico ao analfabetismo e as políticas públicas de educação.

Attenuated total reflection-FT-IR spectroscopic imaging of protein crystallization

Protein crystallization is of strategic and commercial relevance in the post-genomic era because of its pivotal role in structural proteomics projects. Although protein structures are crucial for understanding the function of proteins and to the success of rational drug design and other biotechnology applications, obtaining high quality crystals is a major bottleneck to progress. The major means of obtaining crystals is by massive-scale screening of a target protein solution with numerous crystallizing agents. However, when crystals appear in these screens, one cannot easily know if they are crystals of protein, salt, or any other molecule that happens to be present in the trials. We present here a method based on Attenuated Total Reflection (ATR)-FT-IR imaging that reliably identifies protein crystals through a combination of chemical specificity and the visualizing capability of this approach, thus solving a major hurdle in protein crystallization. ATR-FT-IR imaging was successfully applied to study the crystallization of thaumatin and lysozyme in a high-throughput manner, simultaneously from six different solutions. This approach is fast as it studies protein crystallization in situ and provides an opportunity to examine many different samples under a range of conditions.

Fast and widely tunable Bragg grating reflection filter

A fiber Bragg grating filter device linearly tunable over 45 nm is presented. The device has a maximum tuning speed of 19 nm/ms with a wavelength setting time below 1.5 ms.

Reflection and reflexivity in reviewing and evaluating CDIO:an empirical approach to evaluation

Facilitated by an Engineer and a Social Scientist, both of whom have expertise in Engineering Education Research and Evaluation (EERE), this interactive workshop is divided into three main sections, each one focusing on a different area of evaluation. It will build on research conducted at Aston University School of Engineering and Applied Science to explore and critique the value of introducing CDIO across the first year undergraduate curriculum. Participants will be invited to consider the pedagogical and engineering related challenges of evaluating the academic and practical value of CDIO as a strategy for learning and teaching in the discipline. An empirical approach to evaluation developed by the researchers to provide empirically grounded evidence of the pedagogical and vocational value of CDIO will form the theoretical and conceptual basis of the workshop. This approach is distinctive in that it encapsulates both engineering and social science methods of evaluation. It is also contemporaneous in nature, with the researchers acting as a ‘fly on the wall’ capturing data as the programme unfolds. Through facilitated discussion and participation, the workshop will provide colleagues with the opportunity to develop a cross-disciplinary, empirically grounded research proposal specifically for the purposes of critically evaluating CDIO. It is anticipated that during the workshop, colleagues will work together in small groups. Suitable pedagogical approaches and tools will be suggested and a purposefully developed Engineering Education Research Guide, written by the workshop facilitators, will be given to all participants to inform and support the Workshop approach.

Requirements reflection:requirements as runtime entities

Computational reflection is a well-established technique that gives a program the ability to dynamically observe and possibly modify its behaviour. To date, however, reflection is mainly applied either to the software architecture or its implementation. We know of no approach that fully supports requirements reflection- that is, making requirements available as runtime objects. Although there is a body of literature on requirements monitoring, such work typically generates runtime artefacts from requirements and so the requirements themselves are not directly accessible at runtime. In this paper, we define requirements reflection and a set of research challenges. Requirements reflection is important because software systems of the future will be self-managing and will need to adapt continuously to changing environmental conditions. We argue requirements reflection can support such self-adaptive systems by making requirements first-class runtime entities, thus endowing software systems with the ability to reason about, understand, explain and modify requirements at runtime. © 2010 ACM.