Biodiesel production from waste frying oils over lime catalysts

Biodiesel production from semi-refined oils (SRO) and waste frying oils (WFO) was studied using commercial CaO as heterogeneous catalyst. The methanolysis tests were carried out in mild reaction conditions (62 A degrees C, atmospheric pressure). With such conditions, SRO (soybean and rapeseed) allowed to produce a biodiesel containing 97-98 % of methyl esters (FAME), whereas WFO only provided 86-87 % of FAME. The lower FAME yield for WFO oil is ascribable to the partial neutralization of the catalyst by free fatty acids. Also, soaps formation from the WFO oil reduced the weight yield of the oil phase (containing FAME) obtained and increased the MONG content of the glycerin phase. The catalysts stability tests showed high stability even when WFO oil was processed. Catalytic tests performed with blends of WFO/semi-refined oils showed blending as a good strategy to process low value raw oils with minor decay of the catalyst performance. Both WFO and semi-refined oils showed S-shape kinetics curves thus discarding significant differences of the reaction mechanisms.

Efectividade de um programa de fisioterapia na radiculopatia cervical – estudo de caso

Introdução: Não existe um consenso quanto ao melhor tratamento para a radiculopatia cervical pois existe uma grande variedade de manifestações clínicas e opções terapêuticas, mas a sua selecção vai depender do caso particular do utente, sugerindo assim uma correcta avaliação do Fisioterapeuta. Objectivo: Este estudo pretende descrever e avaliar a efectividade de um programa de Fisioterapia num caso de radiculopatia cervical, na dor, funcionalidade e percepção da qualidade de vida. Participantes e Métodos: Estudo observacional descritivo tipo estudo de caso de um utente de 56 anos de idade, com radiculopatia cervical. Para a avaliação foram utilizados testes ortopédicos, a escala visual analógica e os questionários de incapacidade funcional da cervical e do membro superior bem como da percepção da qualidade de vida. Estes questionários foram aplicados em 3 momentos, antes da intervenção, no final e após 6 semanas e os restantes instrumentos foram utilizados em diversos momentos ao longo da intervenção. Esta foi efectuada duas vezes por semana, ao longo de 10 semanas recorrendo a técnicas de terapia manual, exercícios de controlo motor e educação do utente. Resultados: Verificou-se que a dor na cervical passou de 6,5 para 2/10 EVA e no cotovelo direito de 7,3 para 2/10. A resposta ao questionário de incapacidade funcional na cervical variou de 40% no primeiro momento para 11,1% no segundo, o da incapacidade funcional do membro superior variou de 63,6% para 33,5% e o questionário da percepção da qualidade de vida variou de 55,01 para 68,69. Seis semanas após a intervenção, todos estes resultados se mantinham praticamente inalterados. Conclusão: Este caso permitiu demonstrar o processo de raciocínio clínico efectuado ao longo de dez semanas de intervenção em que se utilizou uma abordagem centrada no utente, baseada na evidência científica e na experiência clínica anterior. Os resultados alcançados foram de encontro às expectativas iniciais e parecem evidenciar que, neste caso, o programa de fisioterapia teve efeitos positivos na dor, funcionalidade e percepção da qualidade de vida.

Os programas de matemática do ensino básico de 1990 e de 2007 e o processo de implementação do programa de 2007, no 1º ciclo do Ensino Básico

Mestrado em Educação Matemática na Educação Pré – Escolar e nos 1.º e 2.º Ciclos do Ensino Básico

As representações das educadoras de infância na inclusão de crianças com nee

Dissertação apresentada à Escola Superior de Educação de Lisboa para obtenção do grau de Mestre em Ciências da Educação - Especialidade Educação Especial: Problemas de Cognição e Multideficiência

Trajectórias de profissionalidade e ciclo de vida profissional: um contributo para o conhecimento dos professores de educação especial

Dissertação apresentada à Escola Superior de Educação de Lisboa para obtenção de grau de mestre em Ciências da Educação - Especialidade Educação Especial

A formação dos educadores de infância na área das ciências: implicações para a supervisão

Dissertação de Mestrado, Supervisão Pedagógica (Educação de Infância), 23 de Abril de 2013, Universidade dos Açores.

A relação entre a álgebra acadêmica e a álgebra escolar em um curso de licenciatura em matemática: concepções de alunos e professores

Pós-graduação em Educação - FCT

Portugal - Teacher education with an atlantic flavor

Este trabalho, em co-autoria, visa divulgar os processos de internacionalização da Universidade dos Açores e da Universidade do Minho, dando conta de um conjunto diversificado de projetos na área do ensino da língua portuguesa e cultura em diferentes partes do mundo.

An adaptive educational system for higher education

The main objective of an Adaptive System is to adequate its relation with the user (content presentation, navigation, interface, etc.) according to a predefined but updatable model of the user that reflects his objectives, preferences, knowledge and competences [Brusilovsky, 2001], [De Bra, 2004]. For Educational Adaptive Systems, the emphasis is placed on the student knowledge in the domain application and learning style, to allow him to reach the learning objectives proposed for his training [Chepegin, 2004]. In Educational AHS, the User Model (UM), or Student Model, has increased relevance: when the student reaches the objectives of the course, the system must be able to readapt, for example, to his knowledge [Brusilovsky, 2001]. Learning Styles are understood as something that intent to define models of how given person learns. Generally it is understood that each person has a Learning Style different and preferred with the objective of achieving better results. Some case studies have proposed that teachers should assess the learning styles of their students and adapt their classroom and methods to best fit each student's learning style [Kolb, 2005], [Martins, 2008]. The learning process must take into consideration the individual cognitive and emotional parts of the student. In summary each Student is unique so the Student personal progress must be monitored and teaching shoul not be not generalized and repetitive [Jonassen, 1991], [Martins, 2008]. The aim of this paper is to present an Educational Adaptive Hypermedia Tool based on Progressive Assessment.

Bullying in hazing pratices : a study on higher education

7 th International Conference of Education, Research and Innovation (ICERI2014 Proceedings), Seville, Spain, 17-19 November 2014.

Mathematical education and interdisciplinarity : promoting public awareness of mathematics in the Azores

Mathematical literacy in Portugal is very unsatisfactory in what concerns international standards. Even more disturbingly, the Azores archipelago ranks as one of the worst regions of Portugal in this respect. We reason that the popularisation of Mathematics through interactive exhibitions and activities can contribute actively to disseminate mathematical knowledge, increase awareness of the importance of Mathematics in today’s world and change its negative perception by the majority of the citizens. Although a significant investment has been undertaken by the local regional government in creating several science centres for the popularisation of Science, there is no centre for the popularisation of Mathematics. We present our first steps towards bringing Mathematics to unconventional settings by means of hands-on activities. We describe in some detail three activities. One activity has to do with applying trigonometry to measure distances in Astronomy, which can also be applied to Earth objects. Another activity concerns the presence of numerical patterns in the Azorean flora. The third activity explores geometrical patterns in the Azorean cultural heritage. It is our understanding that the implementation of these and other easy-to-follow and challenging activities will contribute to the awareness of the importance and beauty of Mathematics.

Hazing practices in higher education : a study with portuguese students

Hazing practices in higher education institutions are perceived controversially. This study looked at the perception towards hazing practices of students from the University of the Azores in first cycle (n=247). It analyses if their perception was positive, emphasizing the integrative aspects of hazing practices, or if it was negative, inclining to define those practises like being violent and humiliating. The applied questionnaire measures 3 factors to define individual’s perception with hazing practices (positive relation with hazing practices, negative relation and the social dimension of the practices). This study used descriptive analyses to observe the level of agreement with hazing practices and non-parametrical statistical test to analyse the relationship between their levels of agreement with hazing practices and socio-demographic variables. Results emphasised balanced proportion of students perceiving positively and negatively those practices and incline to define hazing practices with the same components in both perceptions. It didnot highlight a strong mandatory integrative component in students’ perception. Also, results stressed a large part of students disinterested in hazing practices. Additionally factors of hazing practices’ perception showed significant relationships with respondent’s sex, age and academic degree. Hazing practices in this study did not seem to meet their main objectives of welcoming and integrating freshmen in higher education institutions.