Avaliação teórica, numérica e probabilística de fundações tracionadas.

A geotecnia constitui uma disciplina relativamente recente na área da engenharia civil, e dessa disciplina faz parte um capítulo ainda menos estudado que trata de fundações submetidas a esforços de tração. O presente trabalho deriva do conjunto de provas de cargas realizado para um importante projeto de linhas de transmissão que permitiu a aferição da teoria de capacidade de carga à tração da Universidade de Grenobel, cujos estudos comparativos mostram bons resultados para fins de aplicações práticas. De posse da extensa documentação técnica produzida e documentada por esse estudo foi possível comparar os resultados obtidos pelas provas de cargas e os resultados teóricos com os resultados das modelagens 2D axisimetricas por elementos finitos. Além dessas análises, foi possível verificar a variação da resistência à tração através de análises paramétricas realizadas a partir da variação da coesão e do ângulo de atrito. Os estudos apresentados reafirmam a confiabilidade das teorias da Universidade de Grenoble, que contemplam a simplicidade desejada às aplicações de cunho prático, com resultados satisfatórios em relação àqueles obtidos nos ensaios de tração. Por outro lado, as análises paramétricas realizadas indicaram a tendência de comportamento que a resistência à tração deve apresentar para diferentes parâmetros do solo. O conhecimento dessas tendências permite ao projetista avaliar os fatores de segurança sob ponto de vista probabilístico, ou seja, permite o emprego de fatores de segurança com o conhecimento da probabilidade de ruína associada. As análises probabilísticas foram traçadas a partir do emprego de funções genéricas de várias variáveis no formato FOSM (First Order Second Moment) que fornecem soluções aproximadas para o cálculo de desvio padrão quando não existe uma amostragem representativa. Ao término das análises, obteve-se como resultado, o mapa comparativo da probabilidade de ruína para os mesmos fatores de segurança empregados com base em resistências estimadas através de diferentes métodos de cálculos (Universidade de Grenoble e modelagem computacional).

Frameworks in regulating company directors : rethinking the philosophical foundations to enhance accountability

Sets out a system of corporate governance regulation, aimed at combining legal and social methods of governing director behaviour and at creating a framework flexible enough to accommodate different business and ethical cultures. Outlines the theoretical basis of corporate governance and the broad responsibilities of directors, and discusses the extent to which they can and should be regulated. Discusses the constitution of a regulatory framework encompassing law, soft law and best practice, and ethics.

Investigating functional thinking in the elementary classroom : foundations of early algebraic reasoning

This paper examines the development of student functional thinking during a teaching experiment that was conducted in two classrooms with a total of 45 children whose average age was nine years and six months. The teaching comprised four lessons taught by a researcher, with a second researcher and classroom teacher acting as participant observers. These lessons were designed to enable students to build mental representations in order to explore the use of function tables by focusing on the relationship between input and output numbers with the intention of extracting the algebraic nature of the arithmetic involved. All lessons were videotaped. The results indicate that elementary students are not only capable of developing functional thinking but also of communicating their thinking both verbally and symbolically.

Australian foundations and the downturn

Building on the investigation of the Charity Commission (2009) on the effects of the economic downturn on the largest trusts and foundation in the United Kingdom, the purpose of this research was to assess the extent to which Australian trusts and foundations were taking an actively strategic approach to their investments and pursuit of mission (including grant-making), and the relationship between the two in the context of the economic downturn. Focus was given to identifying the issues raised as a consequence of the economic downturn, rather than providing a generalised snapshot of the ‘average’ foundations response. In September 2009, semi-structured, in depth interviews were conducted with executives of 23 grant making trusts and foundations. The interviews for this research focused on the largest grant makers in terms of grant expenditure, however included foundations from different geographical locations and from across different cause areas. It is important to stress at the outset that this was not a representative sample of foundations; the study aimed to identify issues rather than to present a representative picture of the ‘average’ foundation’s response. It is also important to note that the study was undertaken in September 2009 at a time when many foundations were beginning to feel more optimistic about the longer term future, but aware of continuing and possibly worsening short term income problems. But whatever the financial future, some of the underlying issues, concerning investment and grant making management practices, raised in this report will be of continuing relevance worthy of wider discussion. If a crisis is too good to waste, it is also too good to forget. One other introductory point – as previously noted, interviews for this study were conducted in September 2009 – just one month prior to the introduction of the new Private Ancillary Fund (PAF) legislation which replaced the previous Prescribed Private Fund (PPF) arrangement1. References to PAFs and/or PPFs reflect that time.

Foundations of technology development, innovation and competitiveness in the globalised knowledge economy

With the growth of high-technology industries and knowledge intensive services, the pursuit of industrial competitiveness has progressed from a broad concern with the processes of industrialisation to a more focused analysis of the factors explaining cross-national variation in the level of participation in knowledge industries. From an examination of cross-national data, the paper develops the proposition that particular elements of the domestic science, technology and industry infrastructure—such as the stock of knowledge and competence in the economy, the capacity for learning and generation of new ideas and the capacity to commercialise new ideas—vary cross-nationally and are related to the level of participation of a nation in knowledge intensive activities. Existing understandings of the role of the state in promoting industrial competitiveness might be expanded to incorporate an analysis of the contribution of the state through the building of competencies in science, technology and industry. Keywords: Knowledge; economy; comparative public policy; innovation; science and technology policy

Towards defining semantic foundations for purpose-based privacy policies

We define a semantic model for purpose, based on which purpose-based privacy policies can be meaningfully expressed and enforced in a business system. The model is based on the intuition that the purpose of an action is determined by its situation among other inter-related actions. Actions and their relationships can be modeled in the form of an action graph which is based on the business processes in a system. Accordingly, a modal logic and the corresponding model checking algorithm are developed for formal expression of purpose-based policies and verifying whether a particular system complies with them. It is also shown through various examples, how various typical purpose-based policies as well as some new policy types can be expressed and checked using our model.

Building the foundations : skill acquisition in children

Introduction: Why we need to base childrens’ sport and physical education on the principles of dynamical systems theory and ecological psychology As the childhood years are crucial for developing many physical skills as well as establishing the groundwork leading to lifelong participation in sport and physical activities, (Orlick & Botterill, 1977, p. 11) it is essential to examine current practice to make sure it is meeting the needs of children. In recent papers (e.g. Renshaw, Davids, Chow & Shuttleworth, in press; Renshaw, Davids, Chow & Hammond, in review; Chow et al., 2009) we have highlighted that a guiding theoretical framework is needed to provide a principled approach to teaching and coaching and that the approach must be evidence- based and focused on mechanism and not just on operational issues such as practice, competition and programme management (Lyle, 2002). There is a need to demonstrate how nonlinear pedagogy underpins teaching and coaching practice for children given that some of the current approaches underpinning children’s sport and P.E. may not be leading to optimal results. For example, little time is spent undertaking physical activities (Tinning, 2006) and much of this practice is not representative of the competition demands of the performance environment (Kirk & McPhail, 2002; Renshaw et al., 2008). Proponents of a non- linear pedagogy advocate the design of practice by applying key concepts such as the mutuality of the performer and environment, the tight coupling of perception and action, and the emergence of movement solutions due to self organisation under constraints (see Renshaw, et al., in press). As skills are shaped by the unique interacting individual, task and environmental constraints in these learning environments, small changes to individual structural (e.g. factors such as height or limb length) or functional constraints (e.g. factors such as motivation, perceptual skills, strength that can be acquired), task rules, equipment, or environmental constraints can lead to dramatic changes in movement patterns adopted by learners to solve performance problems. The aim of this chapter is to provide real life examples for teachers and coaches who wish to adopt the ideas of non- linear pedagogy in their practice. Specifically, I will provide examples related to specific issues related to individual constraints in children and in particular the unique challenges facing coaches when individual constraints are changing due to growth and development. Part two focuses on understanding how cultural environmental constraints impact on children’s sport. This is an area that has received very little attention but plays a very important part in the long- term development of sporting expertise. Finally, I will look at how coaches can manipulate task constraints to create effective learning environments for young children.