Aprendizagem dos modelos de grafos, por alunos de MACS do 11.º ano, através da resolução de problemas

Uma das finalidades do ensino de matemática é desenvolver a capacidade do aluno de resolver problemas. Esta atividade, para além de dotar de significado o que se aprende, prepara o aluno para fazer face a problemas do quotidiano. Os modelos de grafos, situações de sistemas de distribuição e explorar soluções para problemas. Em detrimento de uma pedagogia expositiva, os conceitos e notações de grafos foram introduzidos e desenvolvidos, numa turma do 11.º ano, através da resolução de problemas. Pretendemos assim averiguar como os alunos interpretam problemas, que estratégias estabelecem na sua resolução e como formulam problemas. Nessa resolução, qualquer processo era valorizado e não existiam indicações para a utilização de conhecimentos destes modelos. Adotando uma metodologia qualitativa e interpretativa, os dados foram recolhidos através da resolução de três problemas pelos alunos, de gravações de aulas e de uma entrevista no final da experiência. As conclusões do estudo evidenciam que os alunos apresentam dificuldades de interpretação e formulação de enunciados de problemas, utilizam diferentes estratégias na resolução de problemas em grupo e aprenderam os conhecimentos dos modelos grafos, reconhecendo a sua utilidade na resolução de problemas do quotidiano

Aprendizagem dos modelos de grafos, por alunos de MACS do 11º ano, através do trabalho de projeto

Dissertação de mestrado em Ciências da Educação (área de especialização em Supervisão Pedagógica na Educação Matemática)Este estudo visa analisar o contributo do trabalho de projeto na aprendizagem dos modelos de grafos de alunos de uma turma do 11.º ano de MACS. Trata-se de um estudo interpretativo com um design de estudo de caso com grupos de alunos de desempenhos escolares diferentes — médio, bom e fraco — e que procura responder às seguintes questões: (1) Que atividades realizam os alunos na aprendizagem de modelos de grafos através de um trabalho de projeto? Que dificuldades manifestam os alunos na realização dessas atividades? (2) Em que contribuiu o trabalho de projeto na aprendizagem de modelos de grafos? (3) Que perspectivas têm os alunos sobre o trabalho de projeto na aprendizagem de modelos de grafos? Os estudos de caso reportam-se a três fases distintas que decorreram Antes, Durante e Após a experiência de ensino que teve por base a resolução de um problema que traduzia, a partir de um mapa, o percurso de um camião na recolha do lixo de diferentes freguesias. Os dados foram recolhidos através de um questionário, registos escritos dos alunos, transcrições das aulas áudio gravadas, notas de campo e uma entrevista. A revisão de literatura deste estudo estrutura-se em três partes: (1) as teorias de aprendizagem que evidenciam a atividade do professor e/ou aluno na construção do conhecimento matemático; (2) o trabalho de projeto no campo da educação, evidenciando-se vantagens e desvantagens da sua realização na sala de aula, os resultados de algumas investigações sobre esta temática e as particularidades deste método de trabalho, nomeadamente os elementos didáticos que lhe estão associados; (3) referência à evolução do currículo de Matemática, ao aparecimento dos modelos de grafos no currículo português e algumas vantagens que decorrem dessa introdução, apresentando-se exemplos de estudos que abordaram esta temática. Os três grupos de alunos evidenciaram dificuldades na elaboração do problema promotor do trabalho de projeto, mas mostraram compreender os conteúdos de grafos trabalhados, nomeadamente a construção de um grafo a partir do mapa, a determinação de circuitos e caminhos, a aplicação dos algoritmos da cidade mais próxima, do peso das arestas, e de Kruskal. Durante a realização deste trabalho, os alunos evidenciaram ser autónomos na realização das tarefas, capacidade de pesquisa, de argumentação e de comunicação matemática. No trabalho de grupo que desenvolveram, tornaram-se tolerantes e aprenderam a respeitar os diferentes ritmos de aprendizagem dos seus colegas.This study aims to analyze the contribution of the project work in learning graph models of students in the 11th grade of MACS. It is an interpretative study with a study case design with groups of students from different school performances – average, good and weak – which wants to answer questions like: (1) Which activities did students carry out in learning graph models through project work? Which difficulties do they point out? (2) How did the project work help in learning graph models? (3) Which perspectives do students have about project work in learning graph models? The study cases relate to three distinct phases that took place - before, during and after the teaching experience – That had its basics on the resolution of a problem, which showed, trough a map, the route of a waste truck from different parishes. The data were collected through a questionnaire, students' written records, transcripts of recorded audio lessons, field notes and an interview. The literature of this study is structured in three parts: (1) the learning theories that highlight the work of the teacher and / or student in the construction of mathematical knowledge, (2) the project work in the field of education, pointing out the advantages and disadvantages of its achievement in the classroom, the results of some investigations on this subject and the particularities of this method of work, namely the educational elements associated with, (3) reference to the evolution of the national curriculum, the emergence of graph models in the Portuguese curriculum and the advantages of its introduction, presenting examples of studies that have addressed this subject matter. The three groups of students showed difficulties in the elaboration of the initial problem of the project work, but have shown they learned the content of graphs worked out, namely the graph construction from the streets map where the rubbish was collected, the determination of a circuit and a path, the application of algorithms from the nearest town and the weight of the edges, and even Kruskal. During this work, the students showed to be independent in performing the tasks, their ability to research, to communicate and their mathematical reasoning. In the group work they have developed, they have become tolerant and learned to respect the different learning paces of their colleagues

Contributions of mean and shape of blood pressure distribution to worldwide trends and variations in raised blood pressure: A pooled analysis of 1018 population-based measurement studies with 88.6 million participants

© The Author(s) 2018. Background: Change in the prevalence of raised blood pressure could be due to both shifts in the entire distribution of blood pressure (representing the combined effects of public health interventions and secular trends) and changes in its high-blood-pressure tail (representing successful clinical interventions to control blood pressure in the hypertensive population). Our aim was to quantify the contributions of these two phenomena to the worldwide trends in the prevalence of raised blood pressure. Methods: We pooled 1018 population-based studies with blood pressure measurements on 88.6 million participants from 1985 to 2016. We first calculated mean systolic blood pressure (SBP), mean diastolic blood pressure (DBP) and prevalence of raised blood pressure by sex and 10-year age group from 20-29 years to 70-79 years in each study, taking into account complex survey design and survey sample weights, where relevant. We used a linear mixed effect model to quantify the association between (probittransformed) prevalence of raised blood pressure and age-group- and sex-specific mean blood pressure. We calculated the contributions of change in mean SBP and DBP, and of change in the prevalence-mean association, to the change in prevalence of raised blood pressure. Results: In 2005-16, at the same level of population mean SBP and DBP, men and women in South Asia and in Central Asia, the Middle East and North Africa would have the highest prevalence of raised blood pressure, and men and women in the highincome Asia Pacific and high-income Western regions would have the lowest. In most region-sex-age groups where the prevalence of raised blood pressure declined, one half or more of the decline was due to the decline in mean blood pressure. Where prevalence of raised blood pressure has increased, the change was entirely driven by increasing mean blood pressure, offset partly by the change in the prevalence-mean association. Conclusions: Change in mean blood pressure is the main driver of the worldwide change in the prevalence of raised blood pressure, but change in the high-blood-pressure tail of the distribution has also contributed to the change in prevalence, especially in older age groups

Repositioning of the global epicentre of non-optimal cholesterol

High blood cholesterol is typically considered a feature of wealthy western countries(1,2). However, dietary and behavioural determinants of blood cholesterol are changing rapidly throughout the world(3) and countries are using lipid-lowering medications at varying rates. These changes can have distinct effects on the levels of high-density lipoprotein (HDL) cholesterol and non-HDL cholesterol, which have different effects on human health(4,5). However, the trends of HDL and non-HDL cholesterol levels over time have not been previously reported in a global analysis. Here we pooled 1,127 population-based studies that measured blood lipids in 102.6 million individuals aged 18 years and older to estimate trends from 1980 to 2018 in mean total, non-HDL and HDL cholesterol levels for 200 countries. Globally, there was little change in total or non-HDL cholesterol from 1980 to 2018. This was a net effect of increases in low- and middle-income countries, especially in east and southeast Asia, and decreases in high-income western countries, especially those in northwestern Europe, and in central and eastern Europe. As a result, countries with the highest level of non-HDL cholesterol-which is a marker of cardiovascular riskchanged from those in western Europe such as Belgium, Finland, Greenland, Iceland, Norway, Sweden, Switzerland and Malta in 1980 to those in Asia and the Pacific, such as Tokelau, Malaysia, The Philippines and Thailand. In 2017, high non-HDL cholesterol was responsible for an estimated 3.9 million (95% credible interval 3.7 million-4.2 million) worldwide deaths, half of which occurred in east, southeast and south Asia. The global repositioning of lipid-related risk, with non-optimal cholesterol shifting from a distinct feature of high-income countries in northwestern Europe, north America and Australasia to one that affects countries in east and southeast Asia and Oceania should motivate the use of population-based policies and personal interventions to improve nutrition and enhance access to treatment throughout the world.Peer reviewe

Catálogo Taxonômico da Fauna do Brasil: setting the baseline knowledge on the animal diversity in Brazil

The limited temporal completeness and taxonomic accuracy of species lists, made available in a traditional manner in scientific publications, has always represented a problem. These lists are invariably limited to a few taxonomic groups and do not represent up-to-date knowledge of all species and classifications. In this context, the Brazilian megadiverse fauna is no exception, and the Catálogo Taxonômico da Fauna do Brasil (CTFB) (http://fauna.jbrj.gov.br/), made public in 2015, represents a database on biodiversity anchored on a list of valid and expertly recognized scientific names of animals in Brazil. The CTFB is updated in near real time by a team of more than 800 specialists. By January 1, 2024, the CTFB compiled 133,691 nominal species, with 125,138 that were considered valid. Most of the valid species were arthropods (82.3%, with more than 102,000 species) and chordates (7.69%, with over 11,000 species). These taxa were followed by a cluster composed of Mollusca (3,567 species), Platyhelminthes (2,292 species), Annelida (1,833 species), and Nematoda (1,447 species). All remaining groups had less than 1,000 species reported in Brazil, with Cnidaria (831 species), Porifera (628 species), Rotifera (606 species), and Bryozoa (520 species) representing those with more than 500 species. Analysis of the CTFB database can facilitate and direct efforts towards the discovery of new species in Brazil, but it is also fundamental in providing the best available list of valid nominal species to users, including those in science, health, conservation efforts, and any initiative involving animals. The importance of the CTFB is evidenced by the elevated number of citations in the scientific literature in diverse areas of biology, law, anthropology, education, forensic science, and veterinary science, among others

Worldwide trends in hypertension prevalence and progress in treatment and control from 1990 to 2019: a pooled analysis of 1201 population-representative studies with 104 million participants

Background Hypertension can be detected at the primary health-care level and low-cost treatments can effectively control hypertension. We aimed to measure the prevalence of hypertension and progress in its detection, treatment, and control from 1990 to 2019 for 200 countries and territories. Methods We used data from 1990 to 2019 on people aged 30–79 years from population-representative studies with measurement of blood pressure and data on blood pressure treatment. We defined hypertension as having systolic blood pressure 140 mm Hg or greater, diastolic blood pressure 90 mm Hg or greater, or taking medication for hypertension. We applied a Bayesian hierarchical model to estimate the prevalence of hypertension and the proportion of people with hypertension who had a previous diagnosis (detection), who were taking medication for hypertension (treatment), and whose hypertension was controlled to below 140/90 mm Hg (control). The model allowed for trends over time to be non-linear and to vary by age. Findings The number of people aged 30–79 years with hypertension doubled from 1990 to 2019, from 331 (95% credible interval 306–359) million women and 317 (292–344) million men in 1990 to 626 (584–668) million women and 652 (604–698) million men in 2019, despite stable global age-standardised prevalence. In 2019, age-standardised hypertension prevalence was lowest in Canada and Peru for both men and women; in Taiwan, South Korea, Japan, and some countries in western Europe including Switzerland, Spain, and the UK for women; and in several low-income and middle-income countries such as Eritrea, Bangladesh, Ethiopia, and Solomon Islands for men. Hypertension prevalence surpassed 50% for women in two countries and men in nine countries, in central and eastern Europe, central Asia, Oceania, and Latin America. Globally, 59% (55–62) of women and 49% (46–52) of men with hypertension reported a previous diagnosis of hypertension in 2019, and 47% (43–51) of women and 38% (35–41) of men were treated. Control rates among people with hypertension in 2019 were 23% (20–27) for women and 18% (16–21) for men. In 2019, treatment and control rates were highest in South Korea, Canada, and Iceland (treatment >70%; control >50%), followed by the USA, Costa Rica, Germany, Portugal, and Taiwan. Treatment rates were less than 25% for women and less than 20% for men in Nepal, Indonesia, and some countries in sub-Saharan Africa and Oceania. Control rates were below 10% for women and men in these countries and for men in some countries in north Africa, central and south Asia, and eastern Europe. Treatment and control rates have improved in most countries since 1990, but we found little change in most countries in sub-Saharan Africa and Oceania. Improvements were largest in high-income countries, central Europe, and some upper-middle-income and recently high-income countries including Costa Rica, Taiwan, Kazakhstan, South Africa, Brazil, Chile, Turkey, and Iran. Interpretation Improvements in the detection, treatment, and control of hypertension have varied substantially across countries, with some middle-income countries now outperforming most high-income nations. The dual approach of reducing hypertension prevalence through primary prevention and enhancing its treatment and control is achievable not only in high-income countries but also in low-income and middle-income settings

Heterogeneous contributions of change in population distribution of body mass index to change in obesity and underweight NCD Risk Factor Collaboration (NCD-RisC)

From 1985 to 2016, the prevalence of underweight decreased, and that of obesity and severe obesity increased, in most regions, with significant variation in the magnitude of these changes across regions. We investigated how much change in mean body mass index (BMI) explains changes in the prevalence of underweight, obesity, and severe obesity in different regions using data from 2896 population-based studies with 187 million participants. Changes in the prevalence of underweight and total obesity, and to a lesser extent severe obesity, are largely driven by shifts in the distribution of BMI, with smaller contributions from changes in the shape of the distribution. In East and Southeast Asia and sub-Saharan Africa, the underweight tail of the BMI distribution was left behind as the distribution shifted. There is a need for policies that address all forms of malnutrition by making healthy foods accessible and affordable, while restricting unhealthy foods through fiscal and regulatory restrictions

Global variations in diabetes mellitus based on fasting glucose and haemogloblin A1c

Fasting plasma glucose (FPG) and haemoglobin A1c (HbA1c) are both used to diagnose diabetes, but may identify different people as having diabetes. We used data from 117 population-based studies and quantified, in different world regions, the prevalence of diagnosed diabetes, and whether those who were previously undiagnosed and detected as having diabetes in survey screening had elevated FPG, HbA1c, or both. We developed prediction equations for estimating the probability that a person without previously diagnosed diabetes, and at a specific level of FPG, had elevated HbA1c, and vice versa. The age-standardised proportion of diabetes that was previously undiagnosed, and detected in survey screening, ranged from 30% in the high-income western region to 66% in south Asia. Among those with screen-detected diabetes with either test, the agestandardised proportion who had elevated levels of both FPG and HbA1c was 29-39% across regions; the remainder had discordant elevation of FPG or HbA1c. In most low- and middle-income regions, isolated elevated HbA1c more common than isolated elevated FPG. In these regions, the use of FPG alone may delay diabetes diagnosis and underestimate diabetes prevalence. Our prediction equations help allocate finite resources for measuring HbA1c to reduce the global gap in diabetes diagnosis and surveillance.peer-reviewe

Brazilian society of hepatology recommendations for the diagnosis and management of autoimmune diseases of the liver

ABSTRACT In order to draw evidence-based recommendations concerning the management of autoimmune diseases of the liver, the Brazilian Society of Hepatology has sponsored a single-topic meeting in October 18th, 2014 at São Paulo. An organizing committee comprised of seven investigators was previously elected by the Governing Board to organize the scientific agenda as well as to select twenty panelists to make a systematic review of the literature and to present topics related to the diagnosis and treatment of autoimmune hepatitis, primary sclerosing cholangitis, primary biliary cirrhosis and their overlap syndromes. After the meeting, all panelists gathered together for the discussion of the topics and the elaboration of those recommendations. The text was subsequently submitted for suggestions and approval of all members of the Brazilian Society of Hepatology through its homepage. The present paper is the final version of the reviewed manuscript organized in topics, followed by the recommendations of the Brazilian Society of Hepatology

Boas práticas ao Serviço do Utente - Centro Hospitalar do Tâmega e Sousa, EPE

O CHTS pretende e ambiciona na literacia em saúde, na vertente do cidadão, que haja mais igualdades em saúde e que, este cidadão perante a necessidade de tomar decisões de forma autónoma (muitas vezes de elevada complexidade), sobre a promoção de saúde, prevenção das doenças ou seu tratamento, esteja informado e com conhecimentos para o fazer. Pretende que o cidadão seja capaz de obter melhor acesso aos cuidados de saúde, usar e usufruir da forma mais adequada e, de forma intencional e consciente, possa obter os maiores benefíciospara a manutenção do seu estado de saúde. A OMS, define Literacia em Saúde como “o grau em que os indivíduos têm a capacidade de obter, processar e entender as informações básicas de saúde para utilizarem os serviços e tomarem decisões adequadas de saúde”, ou seja, a literacia em saúde contempla um conjunto de conhecimentos, atitudes, habilidades e até competências que capacitam a pessoa no acesso, compreensão das informações para que possa avaliar de forma critica a sua relevância no uso responsável desse conhecimento. Foi, neste contexto, que surgiu no CHTS uma nova ótica de leitura e de intervenção das suas equipas multidisciplinares, na consecução de projetos e ações que visam reforçar os níveis de literacia, de forma multidimensional e colaborativa, aproximando-se cada vez mais da centralidade no cidadão, bem como de uma maior eficiência e eficácia dos serviços, qualidade assistencial e satisfação do cidadão e profissional. Deve-se muito à capacidade dos profissionais de saúde, mesmo com diferenças de uns para outros, em identificar as necessidades das pessoas, em estarem disponíveis para promover mudança, a avaliar diariamente o nível de compreensão, capacidades para realizar tarefas prescritas, motivação e nível de mudança comportamental do cidadão, tendo em conta a sua idade e o seu estado de saúde. José Ribeiro Nunes, Enf. Diretor, Prefácioinfo:eu-repo/semantics/publishedVersio