Evaluating the quality and the success of online courses

Measuring the quality of a b-learning environment is critical to determine the success of a b-learning course. There are a lot of materials related to the quality process, namely different approaches and perspectives but none of them is specific of the product of a b-learning context. In this paper we identify the indicators that should be analyzed in order to determine the quality of a b-learning course, since its success reflect not only the student’s perception, but also what should be taken into account. B-Learning environments are relatively new and combine educational characteristics with technological elements that support the learning process and the training delivery. Our main objective is to know what a high quality b-learning environment is in students’’ perception and what are the main quality dimensions of these courses, in the perspective of the products and services offered. After a literature review concerning the quality process and in particular the b-learning quality field, a structure that provides the main elements that should be evaluated by students when we are measuring the quality and the success of b-learning product/services was created. The structure obtained was applied to a case study of the Polytechnic Institute of Oporto. Results presented will help institutions to deliver services with more quality and improve their long-term competitiveness.

Lighting conditions and optical filters effects on visual performance of speleologists exposed to cave environments

The aim of this study is to evaluate lighting conditions and speleologists’ visual performance using optical filters when exposed to the lighting conditions of cave environments. A crosssectional study was conducted. Twenty-three speleologists were submitted to an evaluation of visual function in a clinical lab. An examination of visual acuity, contrast sensitivity, stereoacuity and flashlight illuminance levels was also performed in 16 of the 23 speleologists at two caves deprived of natural lightning. Two organic filters (450 nm and 550 nm) were used to compare visual function with and without filters. The mean age of the speleologists was 40.65 (± 10.93) years. We detected 26.1% participants with visual impairment of which refractive error (17.4%) was the major cause. In the cave environment the majority of the speleologists used a head flashlight with a mean illuminance of 451.0 ± 305.7 lux. Binocular visual acuity (BVA) was -0.05 ± 0.15 LogMAR (20/18). BVA for distance without filter was not statistically different from BVA with 550 nm or 450 nm filters (p = 0.093). Significant improved contrast sensitivity was observed with 450 nm filters for 6 cpd (p = 0.034) and 18 cpd (p = 0.026) spatial frequencies. There were no signs and symptoms of visual pathologies related to cave exposure. Illuminance levels were adequate to the majority of the activities performed. The enhancement in contrast sensitivity with filters could potentially improve tasks related with the activities performed in the cave.

Quality in Hospital Administrative Databases

The clinical content of administrative databases includes, among others, patient demographic characteristics, and codes for diagnoses and procedures. The data in these databases is standardized, clearly defined, readily available, less expensive than collected by other means, and normally covers hospitalizations in entire geographic areas. Although with some limitations, this data is often used to evaluate the quality of healthcare. Under these circumstances, the quality of the data, for instance, errors, or it completeness, is of central importance and should never be ignored. Both the minimization of data quality problems and a deep knowledge about this data (e.g., how to select a patient group) are important for users in order to trust and to correctly interpret results. In this paper we present, discuss and give some recommendations for some problems found in these administrative databases. We also present a simple tool that can be used to screen the quality of data through the use of domain specific data quality indicators. These indicators can significantly contribute to better data, to give steps towards a continuous increase of data quality and, certainly, to better informed decision-making.

Comparison of contaminant removal effectiveness and air change efficiency as indicator of air diffusion quality.

The ventilation efficiency concept is an attempt to quantify a parameter that can easily distinguish the different options for air diffusion in the building spaces. Thirteen strategies of air diffusion were measured in a test chamber through the application of the tracer gas method, with the objective to validate the calculation by Computational fluid dynamics (CFD). Were compared the Air Change Efficiency (ACE) and the Contaminant Removal Effectiveness (CRE), the two indicators most internationally accepted. The main results from this work shows that the values of the numerical simulations are in good agreement with experimental measurements and also, that the solutions to be adopted for maximizing the ventilation efficiency should be the schemes that operate with low speeds of supply air and small differences between supply air temperature and the room temperature.

Improvement of vegetables elemental quality by espresso coffee residues

Spent coffee grounds (SCG) are usually disposed as common garbage, without specific reuse strategies implemented so far. Due to its recognised richness in bioactive compounds, the effect of SCG on lettuce’s macro- and micro-elements was assessed to define its effectiveness for agro industrial reuse. A greenhouse pot experiment was conducted with different amounts of fresh and composted spent coffee, and potassium, magnesium, phosphorous, calcium, sodium, iron, manganese, zinc and copper were analysed. A progressive decrease on all lettuce mineral elements was verified with the increase of fresh spent coffee, except for potassium. In opposition, an increment of lettuce’s essential macro-elements was verified when low amounts of composted spent coffee were applied (5%, v/v), increasing potassium content by 40%, manganese by 30%, magnesium by 20%, and sodium by 10%, of nutritional relevance This practical approach offers an alternative reuse for this by-product, extendable to other crops, providing value-added vegetable products.

Optimization of River Water Quality Surveys by Multivariate Analysis of Physicochemical, Bacteriological and Ecotoxicological Data

This study aims to optimize the water quality monitoring of a polluted watercourse (Leça River, Portugal) through the principal component analysis (PCA) and cluster analysis (CA). These statistical methodologies were applied to physicochemical, bacteriological and ecotoxicological data (with the marine bacterium Vibrio fischeri and the green alga Chlorella vulgaris) obtained with the analysis of water samples monthly collected at seven monitoring sites and during five campaigns (February, May, June, August, and September 2006). The results of some variables were assigned to water quality classes according to national guidelines. Chemical and bacteriological quality data led to classify Leça River water quality as “bad” or “very bad”. PCA and CA identified monitoring sites with similar pollution pattern, giving to site 1 (located in the upstream stretch of the river) a distinct feature from all other sampling sites downstream. Ecotoxicity results corroborated this classification thus revealing differences in space and time. The present study includes not only physical, chemical and bacteriological but also ecotoxicological parameters, which broadens new perspectives in river water characterization. Moreover, the application of PCA and CA is very useful to optimize water quality monitoring networks, defining the minimum number of sites and their location. Thus, these tools can support appropriate management decisions.

Fresh-cut aromatic herbs: Nutritional quality stability during shelf-life

Fresh-cut vegetables are a successful convenient healthy food. Nowadays, the presence of new varieties of minimally processed vegetables in the market is common in response to the consumers demand for new flavours and high quality products. Within the most recent fresh-cut products are the aromatic herbs. In this work, the objective was to evaluate the nutritional quality and stability of four fresh-cut aromatic herbs. Several physicochemical quality characteristics (colour, pH, total soluble solids, and total titratable acidity) were monitored in fresh-cut chives, coriander, spearmint and parsley leaves, stored under refrigeration (3 ± 1 ºC) during 10 days. Their nutritional composition was determined, including mineral composition (phosphorous, potassium, sodium, calcium, magnesium, iron, zinc, manganese and copper) and fat- and water-soluble vitamin contents. Total soluble phenolics, flavonoids and the antioxidant capacity were determined by spectrophotometric methods. The aromatic herbs kept their fresh appearance during the storage, maintaining their colour throughout shelf-life. Their macronutrient composition and mineral content were stable during storage. Coriander had the highest mineral and fatsoluble vitamin content, while spearmint showed the best scores in the phenolic, flavonoid and antioxidant capacity assays. Vitamins and antioxidant capacity showed some variation during storage, with a differential behaviour of each compound according to the sample.

Popular ID. Identidade visual popular portuguesa em remediação hipermédia

Trabalho de projecto apresentado para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Ciências da Comunicação, área de especialização em Comunicação e Artes.

Participação de crianças com multidificiência e deficiência visual em actividades na escola : orientações para a intervenção

O crescente reconhecimento das limitações das crianças com multideficiência e deficiência visual, quer nas interacções com os parceiros quer de uma forma geral nos ambientes em que se inserem, motivou este estudo, que pretendeu analisar o nível de participação destas crianças em actividades na escola. Considerando a importância de contribuir com informação para orientações na intervenção educativa de crianças com MDVI, realizou-se um estudo que analisa o seu comportamento e envolvimento em actividades da escola. Para a realização deste estudo, observaram-se os comportamentos de três crianças com MDVI, com idades compreendidas entre os 9 e os 10 anos, em três ambientes da escola, nomeadamente a sala de aula, o refeitório e o recreio, e em três actividades (pintura, jogos, almoço, saltar à corda, andar de baloiço e subir escadas) de forma a analisar o seu envolvimento e limitações nas actividades. Na análise dos dados das observações foram identificadas quatro categorias de participação: Inicia, Perde Oportunidade, Inicia com Apoio e Comportamento Potencialmente Comunicativo, registando-se valores que permitiram encontrar características dos comportamentos das crianças observadas, assim como o seu nível de participação em actividades na escola. Os resultados do estudo permitiram verificar que a participação das crianças em actividades está condicionada pelos ambientes em que estão envolvidas, e não pelas problemáticas que cada criança apresenta.----------------------------------------ABSTRACT: The motivation of this study is the increasing knowledge and awareness of children who have multiple disabilities and a visual impairment (MDVI) and the limitation with their peer interactions and in general. The purpose of this study was to analyze the participation level of children with MDVI in school activities. Considering the importance of contributing with guidelines for educational intervention with children with MDVI, we did a study that analyzes the behavior and the level of participation of MDVI children in school activities. In this research study we observed the behavior of three children with MDVI, of 9/10 years old, in three different environments at school; the classroom, the canteen and the playground, and in different activities (painting, playing games, having lunch, skipping rope, etc), in order to analyze their participation and their activity limitations in the activities referred. Data analysis identified four categories of participation: Initiation; Missed Opportunities; Initiation with support and Potentially communicative behavior. Results of data analysis allowed us to find out characteristics of children´s behavior, as well as their level of participation in activities. The main findings of this research allowed us to verify that the child’s engagement in activities depends on the environments where they are located and not on their disability.

Importância do rastreio visual precoce nas crianças: impacto nos cuidados de saúde secundários

Tendo como ponto de partida os objectivos do Programa Nacional para a Saúde da Visão 2004-2010 relativos à prevenção primária e à detecção precoce das alterações oftalmológicas, a tese de mestrado do Ortoptista Jorge Lameirinha sob o tema “Importância do Rastreio Visual Precoce nas Crianças: Impactos nos Cuidados de Saúde Secundários” procura abrir um campo de reflexão e validação de como é feita a detecção precoce de alterações oftalmológicas e a respectiva referenciação dos cuidados de saúde primários para a consulta de especialidade hospitalar. De forma a enquadrar a saúde visual infantil, identificar a importância da sua vigilância e dos critérios de referenciação de alterações oftalmológicas entre diferentes níveis de cuidados de saúde em Portugal – nível primário e secundário -, considerou-se pertinente para efeitos de investigação proceder-se à análise de um universo circunscrito no tempo e no espaço. Esta investigação parte da observação e análise de (1) um universo de 845 crianças com idades compreendidas entre os 0 e os 14 anos que realizaram um rastreio visual na consulta de oftalmologia pediátrica do Hospital de São Bernardo – Centro Hospitalar de Setúbal -, e (2) dos resultados de um inquérito por questionário acerca de como é desenvolvida a vigilância visual infantil, aplicado aos Directores dos Centros de Saúde do Concelho de Setúbal. Da apresentação e discussão dos principais resultados, este estudo traz algumas recomendações para a resolução de determinados bloqueios, identificados na realização do rastreio visual infantil, e propostas para reforçar a implementação das directivas expostas no Programa Nacional para a Saúde Visual.

A formação de professores para o ensino da Matemática no ensino básico a alunos com deficiência visual

Resumo: Este estudo surge no âmbito do Mestrado em Reabilitação na Especialidade de Deficiência Visual ministrado em conjunto pelas Faculdades de Ciências Médicas e Motricidade Humana. Na dissertação intitulada Formação de Professores para o Ensino da Matemática no Ensino Básico a Alunos com DV foi desenvolvida uma investigação, incidindo sobre a temática atrás referida. Na primeira parte apresenta-se uma revisão de literatura, onde se exploram vários conceitos relevantes como a deficiência visual, o currículo de matemática no Ensino Básico, as adaptações curriculares dos alunos com DV, as tecnologias de apoio e a Formação dos Professores, entre outros. Na segunda parte apresentam-se as fundamentações teóricas que subjazem à escolha da metodologia de investigação e instrumentação bem como a descrição dos procedimentos de investigação. Participaram neste estudo 52 professores de Matemática dos três ciclos do ensino básico, que tinham alunos cegos ou com baixa visão nas suas turmas. Os dados foram recolhidos através de um questionário aplicados aos professores. Na terceira parte apresentam-se alguns resultados desta pesquisa. Relativamente à Formação de Professores, sendo N= 52, no que diz respeito à Deficiência Visual, a maioria dos professores (58%) diz não ter conhecimento da mesma e 40% dos professores diz ter algum conhecimento sobre a deficiência visual. Destes professores, grande parte referiu não considerar suficiente a informação recebida, pelo que concluímos ser pertinente a proposta de cursos versando a formação de professores em Deficiência Visual. Conclui-se também que os professores sentem dificuldades com os materiais e equipamentos disponíveis embora refiram que tivessem tido alguma informação sobre os mesmos.----------------------------------------- ABSTRACT: This study is the subject of the Master Course on the Specialty of Visual impaired given by both the Faculties of Ciências Médicas and Motricidade Humana. In the dissertation, the title of Which is Vocational Training of Teachers for the Mathematies teaching in the Basic Compulsory education to students with Visual impaired inside of the thematic behind referred. In the first part it is presented a literature revision, where some concepts are explored like the visual impaired, the curriculum of mathematics in the Basic Compulsory Education, the curriculum adaptations to the pupils with visual impaired, the technologies of support and the vocational training of the teachers, among others. In the second part we can recognize the theoretical recitals that support the choice of the research methodology and the whole instrumens meedes as well as the description of the research procedures. 52 professors of Mathematics from the three cycles of basic compulsory education participated in this study, they had blind pupils or with low vision in their classes. The data had been collected through a questionnaire applied to the teachers. In the third part, we come to some results of this research. In what concerns the vocational training of the teachers being N= 52, the majority of them (58%) says not to have knowledge of it and 40% of them says that they have some knowledge on the visual impaired. Among, a great part mentioned not having received sufficient information, as we conclude to be pertinent the proposal of courses makina the vocational training of teachers in visual impaired a reality. One also concludes that the teachers have difficulties with the materials and available equipment even though they mention to have had some information about them.

A avaliação das barreiras na actividade profissional da pessoa com deficiência visual em Portugal: validação e adaptação do WES (work experience survey)

Resumo: Este estudo tem como finalidade validar e adaptar o WES (Work Experience Survey), de forma a avaliar e caracterizar a percepção que as pessoas DV portuguesas possuem sobre as barreiras ao emprego e as suas formas de resolução e/ou minimização. Da revisão da literatura, constatou-se a inexistência, a nível nacional, de estudos que versassem sobre as barreiras no acesso e manutenção de emprego e estratégias de superação. Este motivo foi o ponto a partir do qual se elaborou a adaptação e validação do questionário WES e a partir do qual alcançamos resultados e conclusões que nos remetem para evidências que a seguir se descrevem. Os dados recolhidos demonstram que esta faixa da população: tem baixos níveis de escolaridade; necessita de aperfeiçoar as suas competências para se tornar mais competitiva no mercado de trabalho; tem dificuldades na acessibilidade ao meio físico, devido às condições de acessibilidade oferecidas; enfrenta problemas no desempenho laboral, devido à falta de tecnologias de apoio e de meios de superação das barreiras no local de trabalho; e sente-se discriminada no acesso e manutenção do emprego, e progressão na carreira. A exploração das razões do insucesso escolar e do perfil de competências adequado, exigíveis para o emprego; o desenvolvimento de planos de promoção da carreira; a divulgação das competências e capacidades dos trabalhadores DV e a averiguação na aplicação da legislação referente à acessibilidade são algumas sugestões apresentadas.

Robot visual localization through local feature fusion: an evaluation of multiple classifiers combination approaches

In the last decade, local image features have been widely used in robot visual localization. In order to assess image similarity, a strategy exploiting these features compares raw descriptors extracted from the current image with those in the models of places. This paper addresses the ensuing step in this process, where a combining function must be used to aggregate results and assign each place a score. Casting the problem in the multiple classifier systems framework, in this paper we compare several candidate combiners with respect to their performance in the visual localization task. For this evaluation, we selected the most popular methods in the class of non-trained combiners, namely the sum rule and product rule. A deeper insight into the potential of these combiners is provided through a discriminativity analysis involving the algebraic rules and two extensions of these methods: the threshold, as well as the weighted modifications. In addition, a voting method, previously used in robot visual localization, is assessed. Furthermore, we address the process of constructing a model of the environment by describing how the model granularity impacts upon performance. All combiners are tested on a visual localization task, carried out on a public dataset. It is experimentally demonstrated that the sum rule extensions globally achieve the best performance, confirming the general agreement on the robustness of this rule in other classification problems. The voting method, whilst competitive with the product rule in its standard form, is shown to be outperformed by its modified versions.

Lean management: aplicação a uma pequena empresa de construção civil

Trabalho Final de Mestrado para obtenção do grau de Mestre em Engenharia Civil Especialização em Edificações