Uma pr��tica colaborativa na construção do portif��lio educacional

Acompanha: Unidade did��tica: elementos de astronomia e energia

A hist��ria da ci��ncia como subs��dio para a construção do conhecimento do conceito da dupla h��lice

Acompanha: Dupla-h��lice: a construção de um conhecimento

Paisagem, um patrim��nio esquecido: subs��dios para a construção de uma metodologia de valora����o e prote����o do cen��rio natural litor��neo

The so-called "residential tourism" came to intensify the previous occupation of the coastal zones, characterized by traditional beach houses, and brought significant consequences for their spatial configuration, and especially for its scenic value of the landscape. Although there is the intention to regulate the activities of enterprising groups by some legal instruments to control the use and occupation of land, and to contain some negative effects, the actions of government are still inefficient in trying to follow the implications on the landscape from the accelerated growth of the real estate and touristic sectors. Supported in the speech of economic development and income generation, public managers prioritize areas to attract tourists to the detriment of preserving important physical attributes of the natural environment that contribute significantly to the quality of life. The result can be noticed in the use of natural elements as one of the major components in the land valorization, and in the immediate attraction of investors and enterprising. Therefore, the objective of this work is to contribute to the debate on the landscape preservation a little detailed thematic in view of their relevance in the current context - by indicating subsidies to the creation of a methodology for the evaluation and protection of coastal zones that may assist the government in creating new instruments, and better prepare it in control of the occupation of these areas. For such, was followed two ways to analysis: the indirect method and the direct method. The first is grounded in the evaluation of landscape attributes, which is based on the work of Raquel Tardin (2008) and Eduardo Cuesta, Encarnaci��n Algarra and Isabel Pastor (2001). The second, based on the research of Leticia and Carlos Hardt (2010) and on the concepts of phenomenology - expressed by Antonio Christofoletti (1985) and Yi-Fu Tuan (1983) - considers the population perspective on the quality of the natural scenery. Developed through cartographic materials, photographic collections and quantitative tables, this dissertation utilized as a case study the beaches of Barra de Tabatinga and Camurupim, located in the city of N��sia Floresta/RN. Despite already being sighted spaces of advanced stage of landscape degradation in these locations, areas of remarkable scenic value can still be found, what reinforce the urgency in adopting preservationists actions. The absence of laws focused on the management and protection of the landscape singularities associated with the inefficiency of the government to invigilate the land occupation in coastal zones, encourage the excessive action of the real estate-tourism, and consequently make the government the main responsible for the environmental and landscape impacts in these areas - by its omission or by their connivance. Therefore, the legislation permeates this entire process and constitutes itself as the most effective way to guarantee the right to the landscape to present and future generations. Are also pointed some important considerations to build a methodology, especially concerning possibilities of improvements and adaptations of its applicability in each case

O ato de educar na construção da profissionaliza����o

Relat��rio de Est��gio apresentado �� Escola Superior de Educa����o de Paula Frassinetti para obten����o de grau Mestre em Educa����o Pr��-Escolar e Ensino 1�� ciclo do Ensino B��sico.

Acompanhamento da construção do edif��cio "Castilho 15"

Relat��rio de Est��gio para obten����o do grau de Mestre em Engenharia Civil

Photonic integrated circuits development: a universal transceiver for NG-PON2

In the last years there has been a clear evolution in the world of telecommunications, which goes from new services that need higher speeds and higher bandwidth, until a role of interactions between people and machines, named by Internet of Things (IoT). So, the only technology able to follow this growth is the optical communications. Currently the solution that enables to overcome the day-by-day needs, like collaborative job, audio and video communications and share of les is based on Gigabit-capable Passive Optical Network (G-PON) with the recently successor named Next Generation Passive Optical Network Phase 2 (NG-PON2). This technology is based on the multiplexing domain wavelength and due to its characteristics and performance becomes the more advantageous technology. A major focus of optical communications are Photonic Integrated Circuits (PICs). These can include various components into a single device, which simpli es the design of the optical system, reducing space and power consumption, and improves reliability. These characteristics make this type of devices useful for several applications, that justi es the investments in the development of the technology into a very high level of performance and reliability in terms of the building blocks. With the goal to develop the optical networks of future generations, this work presents the design and implementation of a PIC, which is intended to be a universal transceiver for applications for NG-PON2. The same PIC will be able to be used as an Optical Line Terminal (OLT) or an Optical Network Unit (ONU) and in both cases as transmitter and receiver. Initially a study is made of Passive Optical Network (PON) and its standards. Therefore it is done a theoretical overview that explores the materials used in the development and production of this PIC, which foundries are available, and focusing in SMART Photonics, the components used in the development of this chip. For the conceptualization of the project di erent architectures are designed and part of the laser cavity is simulated using Aspic���. Through the analysis of advantages and disadvantages of each one, it is chosen the best to be used in the implementation. Moreover, the architecture of the transceiver is simulated block by block through the VPItransmissionMaker��� and it is demonstrated its operating principle. Finally it is presented the PIC implementation.

Sistema de armazenamento de energia com base em baterias e no ondulador de tens��o trif��sico

Disserta����o para obten����o do grau de Mestre em Engenharia Electrot��cnica Ramo de Automa����o e Eletrot��cnica Ramo de Automa����o e Eletr��nica Industrial

Leitora-criadora: a experi��ncia situada na construção dramat��rgica

This study has the purpose of investigating the term reader-creator , on the textual aspects of the dramatical works A Morte nos Olhos , A Mem��ria Ferida and Na Outra Margem (2010) by Antonia Pereira Bezerra. In this sense, we propose an analysis of these works based on author‟s life experience as creative matter for a autofictional narrative, highlighting the relations between the autobiographical elements (LEJEUNE, 2008; DOSSE, 2009) and fictional elements in the construction of dramatic narratives. The theoretical analysis pervades the studies fields of Reception Aesthetics (ISER, 1996), memory (RICOUER, 2007) and narrative (RICOEUR, 2010), evidencing the relation between the author and the pursuit of her memories and life experiences, the matter to elaboration of writing. Then we intend thinking a reader-creator of herself, that at the same time she seeks in her memories the biographic aspects to her narrative, she converts this reality with the insertion of fictional elements from the imagination (SARTRE, 2008)

Correla����o entre as propriedades mec��nicas de materiais impermeabilizantes a base de elast��meros de poliur��ia e poliuretano com o desempenho do sistema aplicado em lajes estruturais

Disserta����o (mestrado)���Universidade de Bras��lia, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, Programa de P��s-gradua����o em Estruturas e Construção Civil, 2015.

Proposta de uma matriz de decis��o em energia hidrel��trica com o uso do m��todo multicrit��rio, para formula����o de pol��ticas p��blicas no estado do Paran��

Brazil is internationally acknowledged for its renewable sources, most notably, hydroelectric power plant projects which correspond to 65% of electricity production supply to the National Interconnected System. The main question behind this research is: what are the weights and the relative importance of the variables which have influence on the decision making process for the expansion of hydroelectric generation projects in Parana? The main objective is to propose a multi-criteria decision procedure, in association with water sources options that take into consideration the weight and relative importance of the alternatives having influence on the decision by enterprises in the generation of electricity in the state of Paran��. As far as the approach to the problem is concerned, this research can be classified as having mixed methodologies, applying Content Analysis, Delphi technique and the Analytic Hierarchy Process. Following Delphi methodology, a group of 21 was selected for data collection, all of those linked to Paranaense hydroelectricity market. And the main result was the construction of a decision tree in which it was possible to identify the importance and relative weight of the elements associated with the four dimensions of energy. In environmental dimension, the highest relative weight was placed on the loading capacity of Parana system; the economic dimension, the amortization of investment; in social dimension, the generation of direct work places and in institutional dimension, the availability of suitable sources of financing. Policy makers and business managers make their decisions based on specific criteria related to the organization segment, market information, economic and political behavior among other indicators that guide them in dealing with the typical tradeoffs of projects in hydropower area. The results obtained in the decision tree show that the economic bias is still the main factor in making investment decisions. However, environmental impacts on the State loading capacity, income generation, providing opportunities for direct as well as indirect jobs. And at an institutional level, the absence of funding sources show that the perception of experts is focused on other issues beyond the logic behind development per se. The order of priority of variables in this study indicates that in the current environment of uncertainty in the Brazilian economy as many variables must be analyzed and compared in order to optimize the scarce resources available to expand local development in relation to Paranaense water matrix.

O ensino da qu��mica na perspectiva da literacia qu��mica: recursos did��cticos para o ensino b��sico

Defende-se hoje que o Ensino B��sico deve, acima de tudo, dotar os alunos de compet��ncias que lhes permitam interagir com a sociedade em que se inserem, o que legitima as expectativas no sentido da forma����o de cidad��os capacitados para exercer a sua responsabilidade social. O processo de Reorganiza����o Curricular do Ensino B��sico actualmente em curso, em Portugal, segue esta orienta����o e prop��e um ensino das ci��ncias no sentido da forma����o dos alunos para a literacia cient��fica. Ora, neste contexto o movimento CTS (Ci��ncia-Tecnologia-Sociedade) assume-se como uma filosofia de ensino que muito se coaduna com os fins pretendidos. Para tal, �� importante ter recursos did��cticos consonantes com esta perspectiva, que suportem as pr��ticas dos professores. O presente estudo teve por objectivo conceber e validar recursos did��cticos CTS utiliz��veis por professores e alunos, no ��mbito do ensino e da aprendizagem do tema Sustentabilidade na Terra, no 3�� ciclo do Ensino B��sico. O percurso metodol��gico seguido incluiu v��rias etapas de entre as quais se destacam pela sua import��ncia: a selec����o de um contexto vi��vel para a abordagem do tema Sustentabilidade na Terra; a planifica����o da abordagem CTS do referido tema; a formula����o de quest��es-problema centradas nos dom��nios cient��fico, social e tecnol��gico; a defini����o dos objectivos CTS na abordagem do problema em causa; a organiza����o de estrat��gias de explora����o das quest��es problema; a valida����o dos Recursos Did��cticos por professores de Qu��mica qualificados e experientes. Optou-se, de uma forma fundamentada, pelo contexto geral ���Barragem de Alqueva���. O produto final do presente estudo apresenta-se na forma de um Caderno de Recursos Did��cticos CTS constitu��do por catorze actividades, organizado em Notas para o Professor, Tarefas para o Aluno e Resposta Adequada, concebidas para o contexto geral Barragem de Alqueva, e estruturadas em torno de quatro sub-temas orientadores: ��gua, Energia, Materiais e Res��duos. Com vista �� valida����o dos Recursos Did��cticos constru��dos planificou-se e realizou-se o Workshop ���Sustentabilidade na Terra ��� perspectivas did��cticas para a sua abordagem��� que foi dinamizado pela autora e dirigido a um painel de treze Professores Avaliadores e no qual participaram tamb��m, como Avaliadoras Externas, duas professoras especialistas em forma����o de professores. VII O processo de valida����o evidenciou que na opini��o dos avaliadores: o contexto Barragem de Alqueva �� de grande relev��ncia social e adequado �� abordagem da tem��tica Sustentabilidade na Terra; os recursos did��cticos s��o adequados quanto ao interesse e extens��o dos textos inseridos nas problem��ticas desenvolvidas, quanto �� adequabilidade da linguagem �� faixa et��ria a que se destinam, quanto ao grau de profundidade dos objectos de ensino, favorecem o desenvolvimento de uma atitude cr��tica, favorecem o desenvolvimento de uma atitude investigativa, de recolha de dados e busca de informa����o complementar, contribuem para o desenvolvimento de atitudes de preserva����o do ambiente e contribuem para a compreens��o do tema Sustentabilidade na Terra; as quest��es que constituem as Tarefas para o Aluno s��o, em geral, exequ��veis pelos alunos a que se destinam. O processo de valida����o foi considerado quer pelos Professores Avaliadores, quer pelas Avaliadoras Externas, adequado aos objectivos do Workshop e, de um modo geral, muito importante na formula����o de uma opini��o sobre os Recursos Did��cticos. As Avaliadoras Externas consideraram-no v��lido e fi��vel o que legitima as conclus��es dele decorrentes. Deste modo, pode dizer-se que o contributo do presente estudo para a inova����o no ensino da Qu��mica se reflecte no Caderno de Recursos Did��cticos constru��do bem como na explicita����o de uma metodologia ��til para investigadores e professores interessados na concep����o e construção de recursos CTS.

Desenvolvimento de cer��mica vermelha utilizando rejeitos da construção civil

The Industry of the Civil Construction has been one of the sectors that most contribute to the pollution of the environment, due to the great amount of residues generated by the construction, demolition and the extraction of raw material. As a way of minimizing the environmental impacts generated by this industry, some governmental organizations have elaborated laws and measures about the disposal of residues from the building construction (CONAMA - resolution 307). This work has as objective the reutilization of residues compound of sand, concrete, cement, red bricks and blocks of cement and mortar for the production of red ceramic, with the objective of minimizing costs and environmental impacts. The investigated samples contained 0% to 50% of residues in weight, and they were sintered at temperatures of 950��C, 1000��C, 1050��C, 1100��C and 1150��C. After the sinterization, the samples were submitted to tests of absorption of water, linear retraction, resistance to bending, apparent porosity, specific density, XRD and SEM. Satisfactory results were obtained in all studied compositions, with the possible incorporation of up to 50% of residues in ceramic mass without great losses in the mechanical strength, giving better results to the incorporation of 30% of residues in the fabrication of ceramic parts, such as roofing tiles, bricks masonry and pierced bricks

Estudo da moagem de alta energia e sinteriza����o de p��s comp��sitos W-Cu

The Tungsten/copper composites are commonly used for electrical and thermal objectives like heat sinks and lectrical conductors, propitiating an excellent thermal and electrical conductivity. These properties are dependents of the composition, crystallite size and production process. The high energy milling of the powder of W-Cu produces an dispersion high and homogenization levels with crystallite size of W very small in the ductile Cu phase. This work discusses the effect of the HEM in preparation of the W-25Cu composite powders. Three techniques of powder preparation were utilized: milling the dry with powder of thick Cu, milling the dry with powder of fine Cu and milling the wet with powder of thick Cu. The form, size and composition of the particles of the powders milled were observed by scanning electron microscopy (SEM). The X-ray diffraction (XRD) was used to analyse the phases, lattice parameters, size and microstrain of the crystallite. The analyse of the crystalline structure of the W-25Cu powders milled made by Rietveld Method suggests the partial solid solubility of the constituent elements of the Cu in lattice of the W. This analyse shows too that the HEM produces the reduction high on the crystallite size and the increase in the lattice strain of both phases, this is more intense in the phase W

S��ntese, caracteriza����o e cin��tica da decomposi����o t��rmica dos materiais cer��micos PrMO3 (M = Ni ou Co)

In this work have been studied the preparation, characterization and kinetic study of decomposition of the polymerizing agent used in the synthesis under non-isothermal condition ceramics PrMO3 of general formula (M = Co and Ni). These materials were obtained starting from the respective metal nitrates, as a cations source, and making use of gelatin as polymerizing agent. The powders were calcined at temperatures of 500��C, 700��C and 900��C and characterized by X-ray Diffraction (XRD), Thermogravimetric Analysis (TG / DTG/ DTA), Infrared Spectroscopy (FTIR), Temperature Programmed Reduction (TPR) and Scanning Electron Microscopy (SEM). The perovskite phase was detected in all the X-rays patterns. In the infrared spectroscopy observed the oxide formation as the calcination temperature increases with the appearance of the band metal - oxygen. The images of SEM revealed uniform distribution for the PrCoO3 and particles agglomerated as consequence of particle size for PrNiO3. From the data of thermal analysis, the kinetics of decomposition of organic matter was employed using the kinetics methods called Model Free Kinetics and Flynn and Wall, in the heating ratios 10, 20 and 30�� C.min-1 between room temperature and 700��C. Finally, been obtained the values of activation energy for the region of greatest decomposition of organic matter in samples that were determined by the degree of conversion (α)

Efeito da moagem de alta energia na microestrutura e nas propriedades magn��ticas do comp��sito wc-10%p.Co

This work a studied the high energy milling effect in microstructure and magnetic properties of the WC-10wt.%Co composite. The composite powders were prepared by mechanical mixed and milled at 2 hours, 100 hours, 200 hours and 300 hours in planetary milling. After this process the composite were compacted in stainless steel die with cylindrical county of 10 mm of diameter, at pressure 200 Mpa and sintered in a resistive furnace in argon atmosphere at 1400 oC for 5 min. The sintered composite were cutted, inlaid, sandpapered, and polished. The microestrutural parameters of the composite was analyzed by X-ray diffraction, scanning electronic microscopy, optical microscopy, hardness, magnetic propriety and Rietveld method analyze. The results shows, with milling time increase the particle size decrease, it possibility minor temperature of sintering. The increase of milling time caused allotropic transformation in cobalt phase and cold welding between particles. The cold welding caused the formation of the particle composite. The X-ray diffraction pattern of composite powders shows the WC peaks intensity decrease with the milling time increase. The X-ray diffraction pattern of the composite sintered samples shows the other phases. The magnetic measurements detected a significant increase in the coercitive field and a decrease in the saturation magnetization with milling time increase. The increase coercitive field it was also verified with decrease grain size with milling time increase. For the composite powders the increase coercitive field it was verified with particle size reduction and saturation magnetization variation is relate with the variation of free cobalt. The Rietveld method analyze shows at milling time increase the mean crystalline size of WC, and Co-cfc phases in composite sintered sample are higher than in composite powders. The mean crystallite size of Co-hc phase in composite powders is higher than in composite sintered sample. The mean lattice strains of WC, Co-hc and Co-cfc phases in composite powders are higher than in composite sintered samples. The cells parameters of the composite powder decrease at milling time increase this effect came from the particle size reduction at milling time increase. In sintered composite the cells parameters is constant with milling time increase