Este trabalho apresenta conceitos e procedimentos que devem ser considerados na análise dinâmica de fundações de máquinas. São discutidas as abordagens e os métodos de cálculo à disposição dos engenheiros, assim como os fatores que influenciam a escolha e o desenvolvimento de modelos matemáticos adequados. Três tipos diferentes de fundação (fundações em bloco rígido, fundações de martelos e fundações aporticadas) são examinados, e são utilizados exemplos para demonstrar a eficácia de técnicas simples de modelagem. / This paper presents concepts and procedures necessary to the dynamic analysis of machine foundations. Analytical approaches available to the designer, and factors which influence the choice and development of a suitable analytical model are discussed. Three different foundations (block foundations, hammer foundations and framed foundations) are examined and examples are given to demonstrate the effectiveness of simple modeling techniques.

Técnicas experimentais de identificação de sistemas de controle têm despertado interesse na indústria, devido a sua facilidade em se ajustar modelos matemáticos, facilitando a formulação e a resolução de problemas de controle de processos. É proposto o uso de uma técnica experimental de identificação de sistemas, utilizando a estrutura matemática linear ARX. Os parâmetros da estrutura matemática ARX são estimados por meio do algoritmo dos mínimos quadrados recursivo (RLS). A comunicação e a aquisição de dados de redes Fieldbus é feita através do padrão de comunicação OPC. / Experimental system identification techniques are considered interesting by industrial sector due to the simple approach to adjust mathematical models, making it easy the formulation and the solution of process control problems. In this work a computational tool is proposed, the Sintonizador, based on the experimental technic of System Identification, using the linear mathematical structure ARX (Auto-Regressive with eXogenous inputs). The ARX structure parameters are estimated by RLS (Recursive Least Square) algorithm. The data comunication and data aquisition of the fieldbus network has been done through of the OPC comunication standard.

This thesis deals with document management in market research agency. The aim of the thesis is to propose solution for document management based on considering the current situation of IS/ICT in such agency and analyzed requests. The thesis consists of three parts. The first part describes agency, current situation of IS/ICT and original requests and constraints taken into consideration for new solution proposal. The second part covers description of final solution and its components. The third part follows implementation of complete solution into production environment and data migration plan.

According to the National Curriculum Statement (NCS) of South Africa cognitive development is a prominent matter which should already commence at pre-school teaching and learning. The NCS envisages learners who will develop to maturity, take their place in society and solve problems by means of critical and creative thinking. Accordingly, teachers are challenged to create teaching and learning environments that stimulate and encourage intellectual openness. This study was undertaken in an attempt to determine to which extent thinking skills in the Foundation Phase, with specific reference to Grade 3 learners, are developed. The study also sought to establish the potential of a self developed, curriculum-based co-operative teaching-learning intervention programme for the development and/or improvement of the thinking skills of Grade 3 learners. The nature of cognitive development, the importance of co-operative learning for cognitive development and the thinking skills that Grade 3 learners should possess, were researched by means of a literature study. A quasiexperimental study followed, using a sequential mixed-method research design. By means of a pre-test the cognitive development levels of two experimental groups, namely experimental group A and experimental group B, comprising thirty learners each, were determined. Thereafter, both groups were exposed to a co-operative teaching-learning intervention programme on a rotational basis to determine the impact of the cooperative teaching-learning intervention programme on the thinking skills of the learners. Data was collected by means of testing and semi-structured interviews with the class teachers of the experimental groups A and B prior to and after the completion of the intervention, focus-group interviews with the learners after the intervention and observation during the implementation of the intervention. Based on the results, it appeared that in accordance with the vision of the NCS, trouble is being taken with the development of the thinking skills of the Foundation Phase learners who took part in the study, and that co-operative learning possesses the latent potential to further develop and promote thinking skills. / Thesis (Ph.D. (Learning and Teaching)--North-West University, Vaal Triangle Campus, 2010.

According to the National Curriculum Statement (NCS) of South Africa cognitive development is a prominent matter which should already commence at pre-school teaching and learning. The NCS envisages learners who will develop to maturity, take their place in society and solve problems by means of critical and creative thinking. Accordingly, teachers are challenged to create teaching and learning environments that stimulate and encourage intellectual openness. This study was undertaken in an attempt to determine to which extent thinking skills in the Foundation Phase, with specific reference to Grade 3 learners, are developed. The study also sought to establish the potential of a self developed, curriculum-based co-operative teaching-learning intervention programme for the development and/or improvement of the thinking skills of Grade 3 learners. The nature of cognitive development, the importance of co-operative learning for cognitive development and the thinking skills that Grade 3 learners should possess, were researched by means of a literature study. A quasiexperimental study followed, using a sequential mixed-method research design. By means of a pre-test the cognitive development levels of two experimental groups, namely experimental group A and experimental group B, comprising thirty learners each, were determined. Thereafter, both groups were exposed to a co-operative teaching-learning intervention programme on a rotational basis to determine the impact of the cooperative teaching-learning intervention programme on the thinking skills of the learners. Data was collected by means of testing and semi-structured interviews with the class teachers of the experimental groups A and B prior to and after the completion of the intervention, focus-group interviews with the learners after the intervention and observation during the implementation of the intervention. Based on the results, it appeared that in accordance with the vision of the NCS, trouble is being taken with the development of the thinking skills of the Foundation Phase learners who took part in the study, and that co-operative learning possesses the latent potential to further develop and promote thinking skills. / Thesis (Ph.D. (Learning and Teaching)--North-West University, Vaal Triangle Campus, 2010.

Thesis (M. Ed.)--University of Hong Kong, 1986. / Includes bibliographical references (leaf 127-131).

Thesis (M.Ed.)--University of Hong Kong, 1986. / Includes bibliographical references (leaves 127-131). Also available in print.

Made available in DSpace on 2014-12-17T14:56:02Z (GMT). No. of bitstreams: 1 DiegoRCS.pdf: 1496847 bytes, checksum: 878c1e9b5f02010d7a253a52ac910a64 (MD5) Previous issue date: 2005-02-15 / Industrial automation networks is in focus and is gradually replacing older architectures of systems used in automation world. Among existing automation networks, most prominent standard is the Foundation Fieldbus (FF). This particular standard was chosen for the development of this work thanks to its complete application layer specification and its user interface, organized as function blocks and that allows interoperability among different vendors' devices. Nowadays, one of most seeked solutions on industrial automation are the indirect measurements, that consist in infering a value from measures of other sensors. This can be made through implementation of the so-called software sensors. One of the most used tools in this project and in sensor implementation are artificial neural networks. The absence of a standard solution to implement neural networks in FF environment makes impossible the development of a field-indirect-measurement project, besides other projects involving neural networks, unless a closed proprietary solution is used, which dos not guarantee interoperability among network devices, specially if those are from different vendors. In order to keep the interoperability, this work's goal is develop a solution that implements artificial neural networks in Foundation Fieldbus industrial network environment, based on standard function blocks. Along the work, some results of the solution's implementation are also presented / As redes para automa??o industrial v?m se destacando e substituindo aos poucos as arquiteturas mais antigas dos sistemas utilizados na ?rea de automa??o. Dentre as redes para automa??o industrial j? existentes, a que mais se destaca ? a Foundation Fieldbus (FF). Essa arquitetura foi escolhida para desenvolver o presente trabalho devido ? completa especifica??o da camada de aplica??o e, por causa da sua interface com o usu?rio, organizada em blocos, o que possibilita a interoperabilidade entre os dispositivos de fabricantes diferentes. Atualmente, uma das aplica??es mais procuradas na automa??o industrial ? a medi??o indireta, que consiste em inferir um valor a partir das medidas de outros sensores. Isso pode ser realizado atrav?s da implementa??o dos chamados software sensors, ou, sensores de software. Uma das ferramentas mais utilizadas no projeto e implementa??o dos sensores de software s?o as redes neurais artificiais. A falta de uma solu??o padr?o que implemente redes neurais no ambiente de redes FF impossibilita o desenvolvimento de um projeto de medi??o indireta para o campo, al?m de outros poss?veis projetos que envolvam redes neurais, a menos que se opte por uma solu??o propriet?ria, o que n?o garante manter a interoperabilidade entre os dispositivos da rede, principalmente se esses forem de fabricantes diferentes. Visando manter a interoperabilidade, este trabalho objetiva desenvolver uma solu??o para executar algoritmos de redes neurais artificiais no ambiente de redes para automa??o industrial Foundation Fieldbus baseada em blocos funcionais padr?es. Ao fim deste trabalho, encontram-se alguns resultados da implementa??o da solu??o aqui abordada

Este trabalho apresenta conceitos e procedimentos que devem ser considerados na análise dinâmica de fundações de máquinas. São discutidas as abordagens e os métodos de cálculo à disposição dos engenheiros, assim como os fatores que influenciam a escolha e o desenvolvimento de modelos matemáticos adequados. Três tipos diferentes de fundação (fundações em bloco rígido, fundações de martelos e fundações aporticadas) são examinados, e são utilizados exemplos para demonstrar a eficácia de técnicas simples de modelagem. / This paper presents concepts and procedures necessary to the dynamic analysis of machine foundations. Analytical approaches available to the designer, and factors which influence the choice and development of a suitable analytical model are discussed. Three different foundations (block foundations, hammer foundations and framed foundations) are examined and examples are given to demonstrate the effectiveness of simple modeling techniques.

Técnicas experimentais de identificação de sistemas de controle têm despertado interesse na indústria, devido a sua facilidade em se ajustar modelos matemáticos, facilitando a formulação e a resolução de problemas de controle de processos. É proposto o uso de uma técnica experimental de identificação de sistemas, utilizando a estrutura matemática linear ARX. Os parâmetros da estrutura matemática ARX são estimados por meio do algoritmo dos mínimos quadrados recursivo (RLS). A comunicação e a aquisição de dados de redes Fieldbus é feita através do padrão de comunicação OPC. / Experimental system identification techniques are considered interesting by industrial sector due to the simple approach to adjust mathematical models, making it easy the formulation and the solution of process control problems. In this work a computational tool is proposed, the Sintonizador, based on the experimental technic of System Identification, using the linear mathematical structure ARX (Auto-Regressive with eXogenous inputs). The ARX structure parameters are estimated by RLS (Recursive Least Square) algorithm. The data comunication and data aquisition of the fieldbus network has been done through of the OPC comunication standard.