Caracterização das actividades pedagógicas promotoras do desenvolvimento das competências visuais que influenciam a iniciação à leitura e à escrita

RESUMO: A presente tese de dissertação de mestrado visa a contribuição para o enriquecimento da organização curricular da Educação Pré-Escolar. Baseia-se num estudo de natureza estatística descritiva, desenvolvido junto de uma amostra de vinte e três Educadores de Infância, dos Jardins de Infância do Concelho de Lourinhã, através da aplicação de um questionário, que procura caracterizar as actividades promotoras de competências visuais, quanto ao grau de importância e de frequência, no que constituem os pré requisitos para a leitura e a escrita. Os resultados sugerem a necessidade de uma maior sistematização dessas actividades e demonstram que um número significativo de actividades são desenvolvidas, neste âmbito, pelos educadores de infância, havendo, no entanto, aspectos considerados lógicos por autores como a Barraga e a Chapman, que não são geralmente considerados. A ênfase das conclusões é colocada, na necessidade de alargar o leque de actividades promotoras dos pré-requisitos para a iniciação à leitura e escrita e às actividades previstas nos Programas Educativos Individuais, para crianças com baixa visão, através da articulação com o docente de educação especial, de forma a que a sua intervenção especializada envolva todos os aspectos considerados fundamentais no treino de visão destas crianças. ABSTRACT: This master’s degree thesis is based on a descriptive statistical study, conducted with a sample of twenty three preschool Teachers working in public kindergartens in Lourinhã, Portugal. The study was based on the results of a questionnaire aimed at contributing to enrich preschool Curricula. The study was based on the scientific knowledge of the precise classroom activities which contribute to develop visual abilities needed for reading and writing. The activities were characterized according to their importance and frequency. The results suggest that these activities should be more planned and more organised. It showed a significant number of activities which are prepared on a regular basis and considered important but, on the other hand; it also showed a significant number of activities which are prepared occasionally. The emphasis of the conclusions is on the fact that the Curricula should include a larger range of activities that promote visual abilities needed for reading and writing and that Individual Educational Programs for low vision children, which include specific activities for vision training, should be built in team with the classroom teacher. In addition, Special Education Teacher’s program should contemplate all the aspects that the Preschool teachers do not, in order to involve all the important aspects for vision training.

Managerial strategies in canning industries: A case study of early twentieth century Portugal

Business History, Vol, 51 Issue 1, p45-58

Learning Activities with Semantic. Hypermedia in Higher Education

The increasing use of information and communication technologies (ICT) in diverse professional and personal contexts calls for new knowledge, and a set of abilities, competences and attitudes, for an active and participative citizenship. In this context it is acknowledged that universities have an important role innovating in the educational use of digital media to promote an inclusive digital literacy. The educational potential of digital technologies and resources has been recognized by both researchers and practitioners. Multiple pedagogical models and research approaches have already contributed to put in evidence the importance of adapting instructional and learning practices and processes to concrete contexts and educational goals. Still, academic and scientific communities believe further investments in ICT research is needed in higher education. This study focuses on educational models that may contribute to support digital technology uses, where these can have cognitive and educational relevance when compared to analogical technologies. A teaching and learning model, centered in the active role of the students in the exploration, production, presentation and discussion of interactive multimedia materials, was developed and applied using the internet and exploring emergent semantic hypermedia formats. The research approach focused on the definition of design principles for developing class activities that were applied in three different iterations in undergraduate courses from two institutions, namely the University of Texas at Austin, USA and the University of Lisbon, Portugal. The analysis of this study made possible to evaluate the potential and efficacy of the model proposed and the authoring tool chosen in the support of metacognitive skills and attitudes related to information structuring and management, storytelling and communication, using computers and the internet.

Measuring the impact of short and lending practices using the DGTW benchmarks

Mutual fund managers increasingly lend their holdings and/or use short sales to generate higher returns for their funds. This project presents a first look into the impact these practices on performance using the performance measures: i) Characteristic Selectivity (CS), the ability of the fund's managers to choose stocks that outperform their benchmarks; ii) Characteristic Timing (CT), the ability of the manager to time the market; iii) and Average Style (AS), the returns from funds systematically holding stocks with certain characteristics. These returns are computed through the DGTW benchmarks. The effect of other variables that have also been shown to impact fund’s returns – total net assets under management, investment styles, turnover and expense ratios – will also be analyzed. I find that managers who use short-sales do not exhibit better stock picking abilities than those who do not, while mutual funds that lend do present higher CS returns. In addition, while lending is not significant for the total performance of a fund, the employment of short-sales and of both short-sales and lending has a negative impact on the fund’s performance.

The role of individual ability and structural embeddedness on entrepreneurial success

In the present thesis I analyse the roles of individual ability and structural embeddedness on entrepreneurial success. The results retrieved from a matched employer-employee longitudinal data set show prior worker productivities and environmental embeddedness to have a persistent positive impact on the size and growth rates of new firms. What is more, embeddedness facilitates the impact of ability on start-up performance with outsiders of comparable abilities starting smaller and slower growing firms. Those in higher ability categories are more likely to transfer and also, albeit to a lesser extent, close their ventures, an effect attributed to the higher opportunity costs associated with the group. Firms managed by embedded agents enjoy longer longevities and have better chances of finding a new owner after the departure of the previous one. Finally, higher ability types show evidence of specialisation in serial entrepreneurship.

Using artificial neural networks to generate trading signals for crude oil, copper and gold futures

In this thesis, a feed-forward, back-propagating Artificial Neural Network using the gradient descent algorithm is developed to forecast the directional movement of daily returns for WTI, gold and copper futures. Out-of-sample back-test results vary, with some predictive abilities for copper futures but none for either WTI or gold. The best statistically significant hit rate achieved was 57% for copper with an absolute return Sharpe Ratio of 1.25 and a benchmarked Information Ratio of 2.11.