Using a Systematic Approach To Develop a Chemistry Course Introducing Students to Instrumental Analysis

A systematic approach to develop the teaching of instrumental analytical chemistry is discussed, as well as a conceptual framework for organizing and executing lectures and a laboratory course. Three main components are used in this course: theoretical knowledge developed in the classroom, simulations via a virtual laboratory, and practical training via experimentation. Problem-based learning and cooperative-learning methods are applied in both the classroom and laboratory aspects of the course. In addition, some reflections and best practices are presented on how to encourage students to learn actively. Overall, a student-centered environment is proposed that aims to cultivate students' practical abilities and individual talents.

Instrumental Parasites: Interfacing the Fragile and the Robust

The parasitical relationship between the grand piano and the myriad objects used in its preparation as pioneered by John Cage in the late 1940’s is here discussed from a perspective of free improvisation practice. Preparations can be defined as the use of a “non-instrument” object (screws, bolts, rubbers etc…) to alter or modify the behaviour of an instrument or part of an instrument. Although also present in instrumental practices based on the electric guitar or the drum kit, the piano provides a privileged space of exploration given its large‐scale resonant body. It also highlights the transgressive aspect of preparation (the piano to be prepared often belongs to a venue rather than to the pianist herself, hence highlighting relationships of trust, care and respect). Since 2007 I have used a guitar-object (a small wooden board with strings and pick ups) connected to a small amplifier to prepare the grand piano in my free improvisation practice. This paper addresses the different relationships afforded by this type preparation which is characterised by the fact that the object for preparation is in itself an instrument (albeit a simplified one), and the preparation is ephemeral and intrinsic to the performance. The paper also reflects on the process of designing an interface from and for a particular practice and in collaboration with a guitar luthier.

Rational Partial Choice Functions and Their Application to Belief Revision.

Necessary and sufficient conditions for choice functions to be rational have been intensively studied in the past. However, in these attempts, a choice function is completely specified. That is, given any subset of options, called an issue, the best option over that issue is always known, whilst in real-world scenarios, it is very often that only a few choices are known instead of all. In this paper, we study partial choice functions and investigate necessary and sufficient rationality conditions for situations where only a few choices are known. We prove that our necessary and sufficient condition for partial choice functions boils down to the necessary and sufficient conditions for complete choice functions proposed in the literature. Choice functions have been instrumental in belief revision theory. That is, in most approaches to belief revision, the problem studied can simply be described as the choice of possible worlds compatible with the input information, given an agent’s prior belief state. The main effort has been to devise strategies in order to infer the agents revised belief state. Our study considers the converse problem: given a collection of input information items and their corresponding revision results (as provided by an agent), does there exist a rational revision operation used by the agent and a consistent belief state that may explain the observed results?

"Things I did not know”: Retrospectives on a Canadian rural male youth suicide using an instrumental photo voice case study

In Canada, it is young rural based men who are at the greatest risk for suicide. While there is no consensus on the reasons for this, evidence points to contextual social factors including isolation, lack of confidential services and pressure to uphold restrictive norms of rural masculinity. In this article we share findings drawn from an instrumental photo voice case study to distil factors contributing to the suicide of a young Canadian rural based man. Integrating photo voice methods and in-depth qualitative we conducted interviews with 7 family members and close friends of the deceased. The interviews and image data were analyzed using constant comparative methods to discern themes related to participants’ reflections on and perceptions about rural male suicide. Three inductively derived themes, “Missing the signs”, “Living up to his public image” and “Down in Rural Canada ” reflect the challenges that survivors and young rural men can experience in attempting to be comply with restrictive dominant ideals of masculinity. We conclude that community based suicide prevention efforts would benefit from gender-sensitive and place specific approaches to advancing men’s mental health by making tangibly available and affirming an array of masculinities to foster the well-being of young rural based men.

Actividade física e autonomia instrumental das pessoas idosas

Pretende-se perceber se existe uma relação entre o nível regular de actividade física praticado pelas pessoas idosas e a sua autonomia instrumental. Desenvolveu-se um estudo descritivo, correlacional e transversal, no ano 2010, com amostra intencional constituída por 100 indivíduos com idade igual ou superior a 60 anos, de ambos sexos. A colheita de dados foi efectuada em dois ginásios e dois centros de dia localizados na cidade de Lisboa, e foram utilizados como instrumentos a Escala de Actividades Instrumentais de Vida Diária de Lawton e Brody e o International Physical Activity Questionnaire. Obteve-se uma média de idades de 76 anos, sendo 78% dos inquiridos do sexo feminino. Inseriram-se 30% na categoria de actividade física “ligeira”, 45% na “moderada” e 25% na “vigorosa”. Relativamente à autonomia instrumental, a maioria era moderadamente dependente. Verificou-se que o grau de autonomia instrumental dos idosos aumenta com o incremento da actividade física praticada (ρS=0.815; p-value<0.001); Abstract: This work seeks to realize if there is a relationship between the level of regular physical activity practiced by elderly persons and its instrumental autonomy. A descriptive, related and transversal study was developed in the year 2010, with an intentional sample consisting of 100 individuals, aged 60 years or above, of both genders. The data collection was carried out in two gymnasiums and two day care centers located in the city of Lisbon, and were used the Lawton and Brody’s Instrumental Activities of Daily Living Scale and the International Physical Activity Questionnaire. A mean age of 76 years was obtained and 78% of the respondents were female. 30% were classified as having a "low" physical activity level, 45% as "moderate" and 25% as "high". Regarding instrumental autonomy, most were moderately dependent. It was verified that the degree of instrumental autonomy of the elderly increases with increased physical activity (ρS=0.815; p-value<0.001).

Interacção entre estruturas intervalares e estruturas espectrais, na música instrumental/vocal

A presente tese apresenta-se num formato bipartido, sendo a primeira parte uma investigação teórica e a segunda parte um conjunto de composições originais que procuram estabelecer, directa e indirectamente, uma relação com a temática investigada. A investigação incide sobre as diferentes relações que se podem estabelecer entre estruturas intervalares e estruturas espectrais, a partir de um conjunto representativo de obras de diferentes compositores. As obras originais da segunda parte configuram um objecto final de análise e reflexão. As composições que integram a segunda parte da tese são: Inês – sete miniaturas sobre A Castro, para soprano e orquestra, sobre excertos de “Castro”, de António Ferreira; Um sino contra o tempo, para flauta, clarinete, percussão e piano; Terra, para orquestra de cordas; Dor e Amor, para voz, flauta, clarinete, percussão, harpa, piano, violino, viola e violoncelo, sobre poemas de Nuno Júdice; e Ode a Gaia, para soprano solo, coro misto e electrónica, a partir de textos de diversos autores e épocas, desde Homero a Fernando Pessoa. Esta investigação surge a partir da convicção de que é possível e enriquecedor para a composição a coexistência e o estabelecimento de uma relação entre estruturas que valorizam as qualidades dos intervalos que as constituem e estruturas de tipo espectral. Se o pensamento intervalar pode ser relacionado com princípios de estruturação ligados a toda uma tradição musical, desde a música modal, à tonal e à atonal, o pensamento espectral relaciona-se com o estudo do fenómeno sonoro e do timbre e é integrado mais tardiamente no séc. XX como um possível modelo estruturante na composição. A investigação sobre as obras seleccionadas, sobretudo de compositores que colocam o fenómeno da percepção num plano central, procura diferentes interacções entre os dois tipos de estrutura, interrogando-se sobre em que medida é que essa interacção influencia ou é mesmo determinante para o resultado musical final. São analisadas diferentes aplicações, tais como: a procura de qualidades acústicas na criação de estruturas intervalares, a criação de timbres particulares para linhas estruturantes, a manipulação tímbrica de estruturas verticais, a inter-relação de camadas intervalares e espectrais na textura musical de forma sincrónica e diacrónica, e o surgimento de material intervalar a partir de estruturas espectrais. Os principais resultados passam pela confirmação de que o pensamento intervalar é compatível com o pensamento espectral e vice-versa, podendo-se concluir que são essenciais diferentes funções para os dois tipos de estrutura na textura musical e que quer as estruturas intervalares quer as espectrais se relacionam com diferentes aspectos da percepção, tendo, assim, uma influência determinante no resultado musical final, na eficácia da escuta e na sua fruição.

A importância da prática de orquestra no ensino especializado da música : implicações no âmbito da motivação para a aprendizagem instrumental

A ideia inicial para esta investigação era estudar o efeito da prática de orquestra na motivação intrínseca dos alunos, nomeadamente as repercussões no estudo individual do instrumento. Foram realizados dois estudos no contexto da investigação: um primeiro estudo de natureza exploratória, no qual foram entrevistados 15 professores e 15 alunos; um segundo estudo, de natureza descritiva e explanatória, no qual se administraram 274 questionários a alunos de 9 classes de orquestra em 4 escolas do ensino especializado da música, assistiu-se a um ensaio de cada uma das orquestras e realizou-se uma entrevista informal ao professor de cada classe de orquestra. Os resultados obtidos indicam que a prática orquestral pode produzir efeitos na motivação dos alunos, com implicações claras no estudo do instrumento. Também foi possível concluir que a participação dos alunos em orquestra poderá ser um fator capaz de motivar os alunos, e capaz de transformar para melhor a perspetiva dos alunos em relação à aprendizagem musical. Este facto sugere que a prática de orquestra deve ser entendida como um pilar fundamental da dinâmica das escolas do ensino especializado da música, e como uma disciplina nuclear do curriculum deste ensino.

Ocean bottom seismic noise : applications for the crust knowledge, interaction ocean-atmosphere and instrumental behaviour

Tese de doutoramento, Ciências Geofísicas e da Geoinformação (Geofisíca), Universidade de Lisboa, Faculdade de Ciências, 2014

Rights, Rationality and Reproduction: Balancing Interests in the Abortion Debate

As medical technology has advanced, so too have our attitudes towards the level of control we can or should expect to have over our procreative capacities. This creates a multidimensional problem for the law and family planning services in terms of access to services – whether to avoid conception or terminate a pregnancy – and the negligent provision of these services. These developments go to the heart of our perception of autonomy. Unsurprisingly, these matters also raise a moral dilemma for the law. Distinctively, discourse in this area is dominated by assertions of subjective moral value; in relation to life, to personal choice and to notions of the archetypal family. Against this, I stress that a model of objective morality can answer these challenging questions and resolve the inherent problems of legal regulation. Therefore, I argue that notions of autonomy must be based on a rational, action-based understanding of what it means to be a ‘moral agent’. I claim that from this we might support a legal standard, based on objective rational morality, which can frame our constitutional norms and our conception of justice in these contentious areas. This paper claims that the current regulation of abortion is outdated and requires radical reform. It proposes a scheme that would shift the choice towards the mother (and the father), remove the unnecessarily broad disability ground and involve doctors having a role of counsel (rather than gatekeeper).

Preparação para a performance instrumental: problemáticas e estratégias: relatório de estágio

Resumo I (Prática Pedagógica) - Nesta seção do relatório de estágio pretende-se caraterizar e apresentar todos os elementos referentes à prática pedagógica, que fizeram parte do estágio do ensino especializado da música, realizado na Escola de Música do Orfeão de Leiria no ano letivo de 2013/2014. De uma forma geral, o relatório de estágio pretende colocar em evidência aspetos pedagógicos como metodologias de ensino, questões motivacionais, estilos de aprendizagem, entre outros. Durante um ano letivo completo foram analisados, com especial atenção, três alunos que foram envolvidos no estágio, construindo e modelando os seus processos de aprendizagem. Para cada um deles foi realizado, ao longo do ano letivo, 30 planos de aula, uma planificação anual e três gravações vídeo/áudio em contexto de aula. Não foi uma tarefa nada fácil de realizar, mas que trouxe inúmeros conhecimentos não só de caráter pedagógico mas também de caráter pessoal. A parte inicial desta seção será dedicada à descrição e caraterização da escola onde foi realizado o estágio, a Escola de Música do Orfeão de Leiria/Conservatório de Artes. Será feita uma pequena abordagem histórica da instituição, bem como do seu projeto educativo, dacomunidade escolar, do seu contexto sociocultural e da classe de saxofone. Será apresentada também uma caraterização dos alunos, segundo vários parâmetros. Posteriormente, serão descritas algumas das práticas educativas desenvolvidas, com os alunos, em contexto de estágio. Para tal, serão utilizados como instrumentos, não só a experiência ativa do docente/estagiário, mas também todas as gravações, planos de aulas e planificações anuais, realizados em contexto de estágio do ensino especializado. Por fim, será realizada uma reflexão crítica do desempenho como docente de saxofone no âmbito do estágio e uma conclusão de toda a seção da prática pedagógica.

Essays on bounded rationality: Individual decision and strategic interaction

Economics is a social science which, therefore, focuses on people and on the decisions they make, be it in an individual context, or in group situations. It studies human choices, in face of needs to be fulfilled, and a limited amount of resources to fulfill them. For a long time, there was a convergence between the normative and positive views of human behavior, in that the ideal and predicted decisions of agents in economic models were entangled in one single concept. That is, it was assumed that the best that could be done in each situation was exactly the choice that would prevail. Or, at least, that the facts that economics needed to explain could be understood in the light of models in which individual agents act as if they are able to make ideal decisions. However, in the last decades, the complexity of the environment in which economic decisions are made and the limits on the ability of agents to deal with it have been recognized, and incorporated into models of decision making in what came to be known as the bounded rationality paradigm. This was triggered by the incapacity of the unboundedly rationality paradigm to explain observed phenomena and behavior. This thesis contributes to the literature in three different ways. Chapter 1 is a survey on bounded rationality, which gathers and organizes the contributions to the field since Simon (1955) first recognized the necessity to account for the limits on human rationality. The focus of the survey is on theoretical work rather than the experimental literature which presents evidence of actual behavior that differs from what classic rationality predicts. The general framework is as follows. Given a set of exogenous variables, the economic agent needs to choose an element from the choice set that is avail- able to him, in order to optimize the expected value of an objective function (assuming his preferences are representable by such a function). If this problem is too complex for the agent to deal with, one or more of its elements is simplified. Each bounded rationality theory is categorized according to the most relevant element it simplifes. Chapter 2 proposes a novel theory of bounded rationality. Much in the same fashion as Conlisk (1980) and Gabaix (2014), we assume that thinking is costly in the sense that agents have to pay a cost for performing mental operations. In our model, if they choose not to think, such cost is avoided, but they are left with a single alternative, labeled the default choice. We exemplify the idea with a very simple model of consumer choice and identify the concept of isofin curves, i.e., sets of default choices which generate the same utility net of thinking cost. Then, we apply the idea to a linear symmetric Cournot duopoly, in which the default choice can be interpreted as the most natural quantity to be produced in the market. We find that, as the thinking cost increases, the number of firms thinking in equilibrium decreases. More interestingly, for intermediate levels of thinking cost, an equilibrium in which one of the firms chooses the default quantity and the other best responds to it exists, generating asymmetric choices in a symmetric model. Our model is able to explain well-known regularities identified in the Cournot experimental literature, such as the adoption of different strategies by players (Huck et al. , 1999), the inter temporal rigidity of choices (Bosch-Dom enech & Vriend, 2003) and the dispersion of quantities in the context of di cult decision making (Bosch-Dom enech & Vriend, 2003). Chapter 3 applies a model of bounded rationality in a game-theoretic set- ting to the well-known turnout paradox in large elections, pivotal probabilities vanish very quickly and no one should vote, in sharp contrast with the ob- served high levels of turnout. Inspired by the concept of rhizomatic thinking, introduced by Bravo-Furtado & Côrte-Real (2009a), we assume that each per- son is self-delusional in the sense that, when making a decision, she believes that a fraction of the people who support the same party decides alike, even if no communication is established between them. This kind of belief simplifies the decision of the agent, as it reduces the number of players he believes to be playing against { it is thus a bounded rationality approach. Studying a two-party first-past-the-post election with a continuum of self-delusional agents, we show that the turnout rate is positive in all the possible equilibria, and that it can be as high as 100%. The game displays multiple equilibria, at least one of which entails a victory of the bigger party. The smaller one may also win, provided its relative size is not too small; more self-delusional voters in the minority party decreases this threshold size. Our model is able to explain some empirical facts, such as the possibility that a close election leads to low turnout (Geys, 2006), a lower margin of victory when turnout is higher (Geys, 2006) and high turnout rates favoring the minority (Bernhagen & Marsh, 1997).