945 resultados para Fractions. Activities. Operations With Fractions
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Introdução e Objectivos: As organizações necessitam de dados para tomar decisões, necessitam de elementos que sirvam de base à resolução de problemas ou à formulação de um juízo. Necessitam de um índice, de uma informação objectiva, disponível para qualquer indivíduo a manipular de acordo com o tipo de análise que pretende efectuar. Temos cada vez mais de nos preocupar em estar devidamente informados e estabelecer as relações mais vantajosas para a nossa organização e para o mercado onde actuamos. Irá implicar a utilização de distintos modelos de análise e instrumentos de recolha de dados, de forma a criar uma base de informação útil aos vários organismos (municipais e nacionais), que projectam as políticas desportivas a desenvolver a nível local e nacional. Com a presente investigação, pretendemos propor um Modelo de Observatório do Desporto e das Actividades Complementares associado a um Sistema de Informação Desportivo, que permita ao poder local (Autarquias), proceder ao levantamento, sempre que necessário, das evoluções concelhias do mercado desportivo, para que de uma forma sustentada, criem e desenvolvam políticas desportivas locais que melhor se ajustem à sua realidade e que sirvam de base à criação da Conta Satélite do Desporto. Material e Métodos: O modelo será testado no concelho de Odivelas, inserido na estrutura da CM Odivelas, sendo necessário a inquirição dos clubes do concelho (apenas os clubes com actividade desportiva activa), numa 1ª fase, e numa 2ª fase, as empresas que lhe dão suporte. Os presidentes e directores de ambas as organizações serão os alvos da aplicação do questionário informático e/ou questionário em suporte papel, de acordo com as realidades e características de cada clube e empresa. Os dados recolhidos serão tratados tratados através do software da aplicação informática que foi criada especificamente para o efeito e que permitirá a exportação de dados para outros suportes informáticos. A própria aplicação irá permitir a construção e apresentação de relatórios de acordo com os requisitos solicitados. Resultados: O objectivo geral do estudo foi alcansado com a construção de um Modelo de Observatório Municipal do Desporto, baseado numa proposta de Sector do Desporto e de Conta Satélite do Desporto, tendo por base o estudo de caso na Câmara Municipal de Odivelas. Os objectivos específicos prenderam-se com a construção de instrumentos de recolha de dados para: - identificar os serviços desportivos e de complemento desportivo prestados no concelho de Odivelas; - identificar as organizações que prestam serviços desportivos e de Proposta Metodológica de Criação de um Observatório Municipal de Desporto, na Administração Pública Local complemento ao desporto; Os dados recolhidos terão de ser cruzados com a informação já existente, mas que se encontra dispersa pelas várias estruturas da CMO, de forma a permitir realizar o “levantamento” dos valores económicos gerados pelas actividades desportivas dos clubes, colectividades e empresas prestadoras de serviços e identificar as lacunas de serviços necessários aos clubes e colectividades não existentes no concelho.
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O presente relatório descreve as atividades de estágio desenvolvidas no âmbito do Mestrado em Reabilitação Psicomotora, Ramo de Aprofundamento de Competências Profissionais, da Faculdade de Motricidade Humana, realizado na Associação Portuguesa para as Perturbações do Desenvolvimento e Autismo (APPDA) - Lisboa, justamente no Centro de Atividades Ocupacionais (CAO) com 47 jovens e adultos e no Centro de Recursos para a Inclusão (CRI) com 21 crianças e jovens, alunos de seis escolas do ensino regular, integrados em Unidades de Ensino Estruturado para o Autismo (UEEA). O estágio profissionalizante desenrolou-se mediante sessões de intervenção psicomotora em ginásio e meio aquático, em contexto de grupo ou individual acompanhando crianças, jovens e adultos com Perturbações do Desenvolvimento e da Aprendizagem, com maior incidência com Perturbações do Espectro do Autismo. O relatório apresenta o enquadramento teórico, legal e institucional e realização da prática profissional, sendo descritos cinco estudos de caso, enquanto modelos exemplificativos do trabalho desenvolvido, adicionando-se uma reflexão acerca da experiência de estágio. Para cada estudo-caso encontra-se descrito o processo de avaliação, estabelecimento de objetivos, programa pedagógico-terapêutico, resultados e respetiva análise. Da referida intervenção foi possível constatar melhorias, tanto a nível psicomotor como emocional e comportamental, sugerindo os benefícios do contributo da intervenção psicomotora nas Perturbações do Desenvolvimento e Aprendizagem.
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Dissertação de mest. em Psicologia da Educação na especialidade Necessidades Educativas Especiais, Faculdade de Ciências Humanas e Sociais, Escola Superior de Educação, Univ. do Algarve, 2002
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O presente relatório enquadra-se no estágio de enfermagem comunitária realizado numa comunidade escolar no período de 14 de Fevereiro a 27 de Junho de 2011, para a conclusão do Mestrado em Enfermagem na área de especialização em enfermagem comunitária. Assim, este relatório pretende: Descrever todas as intervenções realizadas em estágio; Analisar o desenvolvimento das competências adquiridas; Refletir sobre o papel do enfermeiro na intervenção comunitária. O estágio de intervenção comunitária, incidiu na área da promoção da saúde dos adolescentes do concelho de Portalegre: Promoção de uma sexualidade saudável e de hábitos de vida saudáveis na adolescência. A área de intervenção referente à temática da educação sexual na adolescência em meio escolar abrangeu uma população de 276 adolescentes, neste âmbito foram realizadas um total de 15 sessões de educação para a saúde na área da educação sexual, tendo por base as necessidades de informação dos adolescentes nesta área temática. As atividades desenvolvidas com os adolescentes no âmbito dos estilos de vida saudáveis, integrada na promoção da imagem da ESSP abrangeram uma população de 317 adolescentes. O desenvolvimento das atividades de estágio orientadas pela metodologia do planeamento em saúde, foram essenciais para aquisição de competências em enfermagem comunitária
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With the high oil price variability, the petroleum and the reservoir engineers are usually face to face on how they can evaluate the well performance and productivity. They can improve high productivity from the well construction to the secondary recoveries, but they have never tried a measurement in the drilling operations about the lower productivity index. As a rule, frequently the drilling operations hear from the reservoir engineering and geology that, if there is a formation damage, probably some drilling operations practices were not done properly or the good practice in petroleum engineering or mud engineering were not observed. The study in this working search is an attempt of how to measure a formation damage just from the project drilling to the drilling operations, with datum from the fields in Brazilian northeast and putting into practice a Simulator developed from the modeling on the theory offered by different experts and sources in formation damage
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Estuaries are environments prone to the input of chemical pollutants of various kinds and origins, including polycyclic aromatic hydrocarbons (PAHs). Anthropogenic PAHs may have two possible sources: pyrolytic (with four or more aromatic rings and low degree of alkylation) and petrogenic (with two and three aromatic rings and high degree of alkylation). This study aimed to evaluate the levels, distribution and possible sources of polycyclic aromatic hydrocarbons in the estuary of the Potengi river, Natal, Brazil. Samples of bottom sediments were collected in the final 12 km of the estuary until its mouth to the sea, where the urbanization of the Great Natal is more concentrated. Sampling was performed on 12 cross sections, with three stations each, totaling 36 samples, identified as T1 to T36. The non alkylated and alkylated PAHs were analyzed by gas chromatography coupled to mass spectrometry (GC / MS). PAHs were detected in all 36 stations with total concentration on each varying 174-109407 ng g-1. These values are comparable to those of several estuarine regions worldwide with high anthropogenic influence, suggesting the record of diffuse contamination installed in the estuary. PAHs profiles were similar for most stations. In 32 of the 36 stations, low molecular weight PAHs (with 2 and 3 ring: naphthalene, phenanthrene and their alkylated homologues) prevailed, which ranged from 54% to 100% of the total PAH, indicating that leaks, spills and combustion fuels are the dominant source of PAH pollution in the estuary. The level of contamination by PAHs in most stations suggests that there is potential risk of occasional adverse biological effects, but in some stations adverse impacts on the biota may occur frequently. The diagnostic ratios could differentiate sources of PAHs in sediments of the estuary, which were divided into three groups: petrogenic, pyrolytic and mixing of sources. The urban concentration of the Great Natal and the various industrial activities associated with it can be blamed as potential sources of PAHs in bottom sediments of the estuary studied. The data presented highlight the need to control the causes of existing pollution in the estuary
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Forest trees, like oaks, rely on high levels of genetic variation to adapt to varying environmental conditions. Thus, genetic variation and its distribution are important for the long-term survival and adaptability of oak populations. Climate change is projected to lead to increased drought and fire events as well as a northward migration of tree species, including oaks. Additionally, decline in oak regeneration has become increasingly concerning since it may lead to decreased gene flow and increased inbreeding levels. This will in turn lead to lowered levels of genetic diversity, negatively affecting the growth and survival of populations. At the same time, populations at the species’ distribution edge, like those in this study, could possess important stores of genetic diversity and adaptive potential, while also being vulnerable to climatic or anthropogenic changes. A survey of the level and distribution of genetic variation and identification of potentially adaptive genes is needed since adaptive genetic variation is essential for their long-term survival. Oaks possess a remarkable characteristic in that they maintain their species identity and specific environmental adaptations despite their propensity to hybridize. Thus, in the face of interspecific gene flow, some areas of the genome remain differentiated due to selection. This characteristic allows the study of local environmental adaptation through genetic variation analyses. Furthermore, using genic markers with known putative functions makes it possible to link those differentiated markers to potential adaptive traits (e.g., flowering time, drought stress tolerance). Demographic processes like gene flow and genetic drift also play an important role in how genes (including adaptive genes) are maintained or spread. These processes are influenced by disturbances, both natural and anthropogenic. An examination of how genetic variation is geographically distributed can display how these genetic processes and geographical disturbances influence genetic variation patterns. For example, the spatial clustering of closely related trees could promote inbreeding with associated negative effects (inbreeding depression), if gene flow is limited. In turn this can have negative consequences for a species’ ability to adapt to changing environmental conditions. In contrast, interspecific hybridization may also allow the transfer of genes between species that increase their adaptive potential in a changing environment. I have studied the ecologically divergent, interfertile red oaks, Quercus rubra and Q. ellipsoidalis, to identify genes with potential roles in adaptation to abiotic stress through traits such as drought tolerance and flowering time, and to assess the level and distribution of genetic variation. I found evidence for moderate gene flow between the two species and low interspecific genetic differences at most genetic markers (Lind and Gailing 2013). However, the screening of genic markers with potential roles in phenology and drought tolerance led to the identification of a CONSTANS-like (COL) gene, a candidate gene for flowering time and growth. This marker, located in the coding region of the gene, was highly differentiated between the two species in multiple geographical areas, despite interspecific gene flow, and may play a role in reproductive isolation and adaptive divergence between the two species (Lind-Riehl et al. 2014). Since climate change could result in a northward migration of trees species like oaks, this gene could be important in maintaining species identity despite increased contact zones between species (e.g., increased gene flow). Finally I examined differences in spatial genetic structure (SGS) and genetic variation between species and populations subjected to different management strategies and natural disturbances. Diverse management activities combined with various natural disturbances as well as species specific life history traits influenced SGS patterns and inbreeding levels (Lind-Riehl and Gailing submitted).
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Pitch Estimation, also known as Fundamental Frequency (F0) estimation, has been a popular research topic for many years, and is still investigated nowadays. The goal of Pitch Estimation is to find the pitch or fundamental frequency of a digital recording of a speech or musical notes. It plays an important role, because it is the key to identify which notes are being played and at what time. Pitch Estimation of real instruments is a very hard task to address. Each instrument has its own physical characteristics, which reflects in different spectral characteristics. Furthermore, the recording conditions can vary from studio to studio and background noises must be considered. This dissertation presents a novel approach to the problem of Pitch Estimation, using Cartesian Genetic Programming (CGP).We take advantage of evolutionary algorithms, in particular CGP, to explore and evolve complex mathematical functions that act as classifiers. These classifiers are used to identify piano notes pitches in an audio signal. To help us with the codification of the problem, we built a highly flexible CGP Toolbox, generic enough to encode different kind of programs. The encoded evolutionary algorithm is the one known as 1 + , and we can choose the value for . The toolbox is very simple to use. Settings such as the mutation probability, number of runs and generations are configurable. The cartesian representation of CGP can take multiple forms and it is able to encode function parameters. It is prepared to handle with different type of fitness functions: minimization of f(x) and maximization of f(x) and has a useful system of callbacks. We trained 61 classifiers corresponding to 61 piano notes. A training set of audio signals was used for each of the classifiers: half were signals with the same pitch as the classifier (true positive signals) and the other half were signals with different pitches (true negative signals). F-measure was used for the fitness function. Signals with the same pitch of the classifier that were correctly identified by the classifier, count as a true positives. Signals with the same pitch of the classifier that were not correctly identified by the classifier, count as a false negatives. Signals with different pitch of the classifier that were not identified by the classifier, count as a true negatives. Signals with different pitch of the classifier that were identified by the classifier, count as a false positives. Our first approach was to evolve classifiers for identifying artifical signals, created by mathematical functions: sine, sawtooth and square waves. Our function set is basically composed by filtering operations on vectors and by arithmetic operations with constants and vectors. All the classifiers correctly identified true positive signals and did not identify true negative signals. We then moved to real audio recordings. For testing the classifiers, we picked different audio signals from the ones used during the training phase. For a first approach, the obtained results were very promising, but could be improved. We have made slight changes to our approach and the number of false positives reduced 33%, compared to the first approach. We then applied the evolved classifiers to polyphonic audio signals, and the results indicate that our approach is a good starting point for addressing the problem of Pitch Estimation.
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OpenLab ESEV is a project of the School of Education of the Polytechnic Institute of Viseu (ESEV), Portugal, that aims to promote, foster and support the use of Free/Libre Software and Open Source Software, Open Educational Resources, Free Culture, Free file formats and more flexible copyright licenses for creative and educational purposes in the ESEV's domains of activity (education, arts, media). Most of the OpenLab ESEV activities are related to the teacher education and arts and multimedia programs, with a special focus on the later. In this paper, the project and some activities are presented, starting with its origins and its conceptual framework. The presented overview is intended as background for the examination of the use of Free/Libre Software and Free Culture in educational settings, specially at the higher education level, and for creative purposes. The activities developed with students and professionals generated pipelines and workflows implemented for different creative purposes, software packages used for different tasks, choices for file formats and copyright licenses. Finished and ongoing multimedia and arts projects will be presented as real case scenarios.
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De tradição oral e de origem remota, os provérbios circunscrevem a realidade cultural dos seus criadores e utilizadores. A sua riqueza reside, por um lado, na mensagem sintética e por isso, também, pragmática, ao ser utilizada como âncora em contextos específicos; reside, por outro lado, na construção de metáforas conceptuais, tradutoras de verdades e generalizações sedimentadas na observação empírica. É nestas que a língua portuguesa (LP) germina a dimensão cultural e permite a exploração de mundividências partilhadas, transparentes, translúcidas ou opacas. O trabalho que propomos apresentar descreve um conjunto de atividades realizadas com alunos do 5.o ao 8.o ano de escolaridade, no âmbito de um programa desenvolvido por um agrupamento de escolas da região de Viseu e uma instituição de ensino superior durante o ano letivo de 2013-2014. As atividades que propusemos implicaram considerar a LP a partir de diferentes prismas, perspetivando-a não só como código verbal, como herança cultural, mas também como espaço de criação e criatividade. Assim, a sedimentação de significados que foram construindo a LP é apresentada aos alunos como enigma a desvelar. Neste sentido, propomos a) analisar a representação gráfica de provérbios feita por alunos do ensino básico; b) refletir sobre a influência da LP na formação de provérbios em países de expressão portuguesa. A sua interpretação é padronizada, mas permeável a ambiguidades. Neste caso, e a partir da comparação de um exercício de equivalência entre provérbios representados pela variedade do português, revelamos a seleção dos alunos.
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Introducción: Contar con un diagnóstico de las condiciones en seguridad y salud en el trabajo en el país permite crear estrategias para minimizar los problemas de la población trabajadora. En Colombia existe el observatorio del Instituto Nacional de Salud, sin embargo, no cuenta, en ninguno de sus tópicos, con información y análisis sobre la salud y seguridad de la población trabajadora. Objetivo: Determinar las condiciones de salud de la población atendida en la IPS SALUD OCUPACIONAL DE LOS ANDES LDTA en la ciudad de Bogotá, durante el año 2015. Materiales y métodos: Se realizó una prueba piloto del observatorio de salud y seguridad en el trabajo mediante un estudio de corte transversal, donde se tomó una base de datos de pacientes evaluados en la IPS SALUD OCUPACIONAL DE LOS ANDES LDTA, de la ciudad de Bogotá D.C. que contiene información de exámenes médicos ocupacionales realizados en el 2015 en la plataforma ISISMAWEB con una muestra representativa de 1923 registros. Se incluyeron variables sociodemográficas y laborales, los paraclínicos registrados como alterados más prevalentes, los diagnósticos y dictámenes emitidos en la población estudiada y las recomendaciones personales dadas por el sistema de gestión de la empresa. Se realizó un análisis descriptivo y para el estudio de las interacciones se empleó el Chi-cuadrado. Resultados: El 62,1% de la población fueron hombres con edad promedio de 34.8 años (DE 10,521). El 41.5% tuvieron estudios secundarios. La evaluación médica más realizada fue el examen de ingreso en el 30.5% de los casos. El cargo operadores de instalaciones y máquinas y ensambladores represento el 27.9% y en última medida los profesionales de nivel medio en operaciones financieras y administrativas con el 0.5%. El diagnostico CIE 10 emitido más frecuente fue con el 15,8% el código Z100 (Examen de salud ocupacional), seguido del Trastorno de la refracción no especificado (H527) con el 9,0%. En cuanto a las recomendaciones generales la que más se repitió fue examen periódico con un 30%. La recomendación preventiva más frecuente fue osteomuscular con el 36,5%. Las recomendaciones SVE de mayor prevalencia fueron ergonómicas con un 40,7%. Se encontraron asociaciones (p<0.05) entre las variables escolaridad, género y estrato. Conclusiones: Se deben optimizar los mecanismos de recolección del dato para ser más viable su evaluación y asociación. Hay un subregístro importante de segundos diagnósticos asociado al no registro de los paraclínicos. Este estudio plantea un modelo a seguir para poder desarrollar el observatorio nacional de salud y seguridad en el trabajo.
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The Efficient Market Hypothesis (EMH), one of the most important hypothesis in financial economics, argues that return rates have no memory (correlation) which implies that agents cannot make abnormal profits in financial markets, due to the possibility of arbitrage operations. With return rates for the US stock market, we corroborate the fact that with a linear approach, return rates do not show evidence of correlation. However, linear approaches might not be complete or global, since return rates could suffer from nonlinearities. Using detrended cross-correlation analysis and its correlation coefficient, a methodology which analyzes long-range behavior between series, we show that the long-range correlation of return rates only ends in the 149th lag, which corresponds to about seven months. Does this result undermine the EMH?
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The International Seabed Authority (ISA) regulates the activities related with the exploration and exploitation of seabed mineral resources in the Area, which are considered as the "common heritage of mankind" under the United Nations Convention on the Law of the Sea.The ISA has also the mandate to ensure the protection of the marine environment.The development of good practices for the annual reporting and data submission by Contractors is crucial for the ISA to comply with the sustainable development of the mineral marine resources. In 2015,the ISA issued a new template for reporting on exploration activities, which includes the definition of the format for all geophysical, geological and environmental data to be collected and analysed during exploration. The availability of reliable data contributes to improve the assessment of the ISA on the activities in the Area while promoting transparency, which is considered as a major principle of industry bestpractices.
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Although errors might foster learning, they can also be perceived as something to avoid if they are associated with negative consequences (e.g., receiving a bad grade or being mocked by classmates). Such adverse perceptions may trigger negative emotions and error-avoidance attitudes, limiting the possibility to use errors for learning. These students’ reactions may be influenced by relational and cultural aspects of errors that characterise the learning environment. Accordingly, the main aim of this research was to investigate whether relational and cultural characteristics associated with errors affect psychological mechanisms triggered by making mistakes. In the theoretical part, we described the role of errors in learning using an integrated multilevel (i.e., psychological, relational, and cultural levels of analysis) approach. Then, we presented three studies that analysed how cultural and relational error-related variables affect psychological aspects. The studies adopted a specific empirical methodology (i.e., qualitative, experimental, and correlational) and investigated different samples (i.e., teachers, primary school pupils and middle school students). Findings of study one (cultural level) highlighted errors acquire different meanings that are associated with different teachers’ error-handling strategies (e.g., supporting or penalising errors). Study two (relational level) demonstrated that teachers’ supportive error-handling strategies promote students’ perceptions of being in a positive error climate. Findings of study three (relational and psychological level) showed that positive error climate foster students’ adaptive reactions towards errors and learning outcomes. Overall, our findings indicated that different variables influence students’ learning from errors process and teachers play an important role in conveying specific meanings of errors during learning activities, dealing with students’ mistakes supportively, and establishing an error-friendly classroom environment.
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Depuis 70 ans, les outils de planification des zones dédiées aux activités productives (Zones industrielles, Zones d’activités économiques, etc.) ont produit des espaces déconnectés des spécificités physiques et sociales du territoire, et ont participé à réduire le sol à un support de production soumis en premier lieu à des logiques de marché. Aujourd’hui, nous constatons l’inadéquation de ces outils avec leur objectif : le développement du territoire. L’ambition de la thèse est de réfléchir à une démarche alternative qui permet d’envisager des outils de planification capables d’instaurer une relation de maintien et de valorisation des ressources territoriales. Face à un aménagement des activités productives inadéquat au développement durable du territoire, la thèse propose de retracer une généalogie de la démarche « territorialiste » qui vise à établir une relation synergique entre la production et les ressources territoriales. Une démarche « Eutopique » de retour au territoire qui, en prenant en compte le lien indissociable entre défis sociaux et environnementaux, permet d’un côté de rétablir une relation aux ressources naturelles et d’en respecter les cycles et les rythmes écologiques, et de l’autre d’identifier des éléments de réponse à la crise sociale. Suite à une introduction critique du rapport que les activités productives établissent avec le territoire, le raisonnement se développe en quatre parties : Les trois premières parties suivent une approche généalogique et montrent comment les concepts de cette démarche ont évolué et se sont transformées en s’adaptant à différents contextes, et répondant à la question de pourquoi et comment ces transferts théoriques ont vu le jour. Dans la quatrième partie de la thèse est retracée l’influence et le développement original que cette démarche trouve aujourd’hui en France : l’objectif est celui d’ouvrir sur des stratégies pour envisager un système productif capable de développer le territoire dans le temps long.