Análise de aspectos sociocientíficos em questões de química do Enem: subsídio para a elaboração de material didático para a formação cidadã

Acompanha: Manual didático: o emprego de aspectos sociocientíficos no ensino de química

Producció de material docent per a ciència de materials mitjançant microscòpia electrònica de rastreig i làser confocal

Aquest projecte s'ha realitzat al Servei de Microscòpia de la Universitat Autònoma de Barcelona, i ha tingut una durada de dos anys (2006-2008). La finalitat d’aquest projecte ha estat l’elaboració de material didàctic basat en la captació d’imatges i l’edició de recursos pedagògics de suport digital aplicats a la ciència de materials. Es pretén millorar així la qualitat docent de les pràctiques de diverses assignatures dels ensenyaments de Física i d’Enginyeria de Materials utilitzant tècniques d’anàlisi actuals com són la Microscòpia Electrònica de Rastreig (MER) i la Microscòpia Optica (MO). Amb aquest projecte es vol fomentar també el treball interdisciplinari en equip entre professionals (docents i tècnics superiors de recerca) i acostar la teoria de les assignatures a la realització pràctica, facilitant el suport digital necessari per aconseguir un màxim aprofitament a les aules. Les imatges de MER i MO ajudaran als alumnes a familiaritzar-se amb el món de la recerca i la indústria.

Um estudo sobre custos de elaboração de material didático e tutoria em EaD online em uma Instituição de Ensino Superior no Brasil

This study has as main objective to verify the proportionality of the costs with elaboration of didactic material and costs with tutelage and instruction incurred in a higher education institution, located in national territory, and that offers a degree course in the education area in the modality of EaD online. The purpose of the measurement of this proportionality of the costs was of answering these they are, among other, the relevant costs incurred by the institution research object. This is a research of exploratory stamp whose methodological procedure adopted for your development, in what it refers the collection, analysis of the data and the investigation means, it is the case study, as well as the documental and bibliographical research. The found results indicate that the costs with elaboration of didactic material and the costs with tutelage and instruction are relevant, however they are not the only ones considered as such. The costs involved with acquisition and operation of specific softwares they also constitute an relevant costs. The structure of the costs can be altered in agreement with the analyzed period and in agreement with the characteristics of synchronism of the offered course. It was also verified that the technology used in this education modality it ends up generating additional costs incurred with professionals of specific knowledge in technology

Produção de material didático para o ensino de solos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Synchronous Description of the Grammatical Structure of Modern Romani and Elaboration of Romani Textbook

The first outcome of this project was a synchronous description of the most widely spoken Romani dialect in the Czech and Slovak Republics, aimed at teachers and lecturers of the Romani language. This is intended to serve as a methodological guide for the demonstration of various grammatical phenomena, but may also assist people who want a basic knowledge of the linguistic structure of this neo-Indian language. The grammatical material is divided into 23 chapters, in a sequence which may be followed in teaching or studying. The book includes examples of the grammatical elements, but not exercises or articles. The second work produced was a textbook of Slovak Romani, which is the most detailed in the Czech or Slovak Republics to date. It is aimed at all those interested in active use of the Romani language: high school and university students, people working with the Roma, and Roma who speak little or nothing of the language of their forebears, The book includes 34 lessons, each containing relevant Romani tests (articles and dialogues), a short vocabulary list, grammatical explanations, exercises and examples of Romani written or oral expression. The textbook also contains a considerable amount of ethno-cultural information and notes on the life and traditions of the Roman, as well as pointing out some differences between different dialects. A brief Romani-Czech phrase book is included as an appendix.

Hazard index maps for woody material recruitment and transport in alpine catchments

A robust and reliable risk assessment procedure for hydrologic hazards deserves particular attention to the role of transported woody material during flash floods or debris flows. At present, woody material transport phenomena are not systematically considered within the procedures for the elaboration of hazard maps. The consequence is a risk of losing prediction accuracy and of underestimating hazard impacts. Transported woody material frequently interferes with the sediment regulation capacity of open check dams and moreover, when obstruction phenomena at critical crosssections of the stream occur, inundations can be triggered. The paper presents a procedure for the determination of the relative propensity of mountain streams to the entrainment and delivery of recruited woody material on the basis of empirical indicators. The procedure provided the basis for the elaboration of a hazard index map for all torrent catchments of the Autonomous Province of Bolzano/Bozen. The plausibility of the results has been thoroughly checked by a backward oriented analysis on natural hazard events, documented since 1998 at the Department of Hydraulic Engineering of the aforementioned Alpine Province. The procedure provides hints for the consideration of the effects, induced by woody material transport, during the elaboration of hazard zone maps.

Material paradidático em educação ambiental para o 6º ano do ensino fundamental

Acompanha: Material paradidático em educação ambiental para o 6º ano do ensino fundamental

Elaboración de una guía y material didáctico de la geometría del es-pacio para el laboratorio de matemáticas de la carrera de matemáti-cas y física de la Universidad de Cuenca

La Geometría del Espacio es una rama de la Matemática que estudia las propieda-des y medidas de figurasque se relacionan con la mayoría de objetos tridimensionales que tenemos a nuestro alrededor; por esto nuestro trabajo titulado “Elaboración de una guía y material didáctico de la Geometría del Espacio para el Laboratorio de Matemática de la carrera de Matemáticas y Física de la Universidad de Cuenca” da lugar a una nueva estrategia que puede utilizar el docente en el proceso de enseñanza-aprendizaje de esta asignatura. En el capítulo uno de nuestro trabajo de graduación se analizan los aspectos generales de la educación así como las corrientes pedagógicas que están presentes dentro del proceso educativo, para luego hablar de la didáctica y la importancia de trabajar con material concreto en el área de Matemática, específicamente en la Geometría del Espacio así como los recursos que son óptimos para trabajar esta asignatura. En el capítulo dos, se demuestra mediante un muestreo no probabilístico que existe dificultad en la comprensión de los contenidos de la Geometría del Espacio y que una buena opción para desarrollar el proceso de enseñanza-aprendizaje sobre esta asignatura es la utilización de material concreto y de una guía didáctica que facilite la comprensión de los contenidos. Por último en el capítulo tres se presenta un conjunto de diez prácticas sobre pla-nos y sólidos, las cuales, siguen los pasos que exige una práctica de laboratorio innovadora, de una manera ordenada y secuencial para reforzar el proceso de enseñanza-aprendizaje.

Effect Of Platform Connection And Abutment Material On Stress Distribution In Single Anterior Implant-supported Restorations: A Nonlinear 3-dimensional Finite Element Analysis.

Although various abutment connections and materials have recently been introduced, insufficient data exist regarding the effect of stress distribution on their mechanical performance. The purpose of this study was to investigate the effect of different abutment materials and platform connections on stress distribution in single anterior implant-supported restorations with the finite element method. Nine experimental groups were modeled from the combination of 3 platform connections (external hexagon, internal hexagon, and Morse tapered) and 3 abutment materials (titanium, zirconia, and hybrid) as follows: external hexagon-titanium, external hexagon-zirconia, external hexagon-hybrid, internal hexagon-titanium, internal hexagon-zirconia, internal hexagon-hybrid, Morse tapered-titanium, Morse tapered-zirconia, and Morse tapered-hybrid. Finite element models consisted of a 4×13-mm implant, anatomic abutment, and lithium disilicate central incisor crown cemented over the abutment. The 49 N occlusal loading was applied in 6 steps to simulate the incisal guidance. Equivalent von Mises stress (σvM) was used for both the qualitative and quantitative evaluation of the implant and abutment in all the groups and the maximum (σmax) and minimum (σmin) principal stresses for the numerical comparison of the zirconia parts. The highest abutment σvM occurred in the Morse-tapered groups and the lowest in the external hexagon-hybrid, internal hexagon-titanium, and internal hexagon-hybrid groups. The σmax and σmin values were lower in the hybrid groups than in the zirconia groups. The stress distribution concentrated in the abutment-implant interface in all the groups, regardless of the platform connection or abutment material. The platform connection influenced the stress on abutments more than the abutment material. The stress values for implants were similar among different platform connections, but greater stress concentrations were observed in internal connections.

Improved Selective Cholesterol Adsorption By Molecularly Imprinted Poly(methacrylic Acid)/silica (pmaa-sio₂) Hybrid Material Synthesized With Different Molar Ratios.

The present paper describes the synthesis of molecularly imprinted polymer - poly(methacrylic acid)/silica and reports its performance feasibility with desired adsorption capacity and selectivity for cholesterol extraction. Two imprinted hybrid materials were synthesized at different methacrylic acid (MAA)/tetraethoxysilane (TEOS) molar ratios (6:1 and 1:5) and characterized by FT-IR, TGA, SEM and textural data. Cholesterol adsorption on hybrid materials took place preferably in apolar solvent medium, especially in chloroform. From the kinetic data, the equilibrium time was reached quickly, being 12 and 20 min for the polymers synthesized at MAA/TEOS molar ratio of 6:1 and 1:5, respectively. The pseudo-second-order model provided the best fit for cholesterol adsorption on polymers, confirming the chemical nature of the adsorption process, while the dual-site Langmuir-Freundlich equation presented the best fit to the experimental data, suggesting the existence of two kinds of adsorption sites on both polymers. The maximum adsorption capacities obtained for the polymers synthesized at MAA/TEOS molar ratios of 6:1 and 1:5 were found to be 214.8 and 166.4 mg g(-1), respectively. The results from isotherm data also indicated higher adsorption capacity for both imprinted polymers regarding to corresponding non-imprinted polymers. Nevertheless, taking into account the retention parameters and selectivity of cholesterol in the presence of structurally analogue compounds (5-α-cholestane and 7-dehydrocholesterol), it was observed that the polymer synthesized at the MAA/TEOS molar ratio of 6:1 was much more selective for cholesterol than the one prepared at the ratio of 1:5, thus suggesting that selective binding sites ascribed to the carboxyl group from MAA play a central role in the imprinting effect created on MIP.

Mesenchymal Stromal Cells From Adipose Tissue Attached To Suture Material Enhance The Closure Of Enterocutaneous Fistulas In A Rat Model.

Surgical treatment for enterocutaneous fistulas (EF) frequently fails. Cell therapy may represent a new approach to treatment. Mesenchymal stromal cells (MSCs) have high proliferative and differentiation capacity. This study aimed to investigate whether MSCs could adhere to suture filament (SF), promoting better EF healing. MSCs, 1 × 10(6), from adipose tissue (ATMSCs) were adhered to a Polyvicryl SF by adding a specific fibrin glue formulation. Adhesion was confirmed by confocal and scanning electron microscopy (SEM). A cecal fistula was created in 22 Wistar rats by incising the cecum and suturing the opening to the surgical wound subcutaneously with four separate stitches. The animals were randomly allocated to three groups: control (CG)-five animals, EF performed; injection (IG)-eight animals 1 × 10(6) ATMSCs injected around EF borders; and suture filament (SG): nine animals, sutured with 1 × 10(6) ATMSCs attached to the filaments with fibrin glue. Fistulas were photographed on the operation day and every 3 days until the 21st day and analyzed by two observers using ImageJ Software. Confocal and SEM results demonstrated ATMSCs adhered to SF (ATMSCs-SF). The average reduction size of the fistula area at 21st day was greater for the SG group (90.34%, P < 0.05) than the IG (71.80%) and CG (46.54%) groups. ATMSCs adhered to SF maintain viability and proliferative capacity. EF submitted to ATMSCs-SF procedure showed greater recovery and healing. This approach might be a new and effective tool for EF treatment.

Brazilian Natural Fiber (jute) As Raw Material For Activated Carbon Production.

Jute fiber is the second most common natural cellulose fiber worldwide, especially in recent years, due to its excellent physical, chemical and structural properties. The objective of this paper was to investigate: the thermal degradation of in natura jute fiber, and the production and characterization of the generated activated carbon. The production consisted of carbonization of the jute fiber and activation with steam. During the activation step the amorphous carbon produced in the initial carbonization step reacted with oxidizing gas, forming new pores and opening closed pores, which enhanced the adsorptive capacity of the activated carbon. N2 gas adsorption at 77K was used in order to evaluate the effect of the carbonization and activation steps. The results of the adsorption indicate the possibility of producing a porous material with a combination of microporous and mesoporous structure, depending on the parameters used in the processes, with resulting specific surface area around 470 m2.g-1. The thermal analysis indicates that above 600°C there is no significant mass loss.

Produção de serapilheira e decomposição do material foliar em um cerradão na Estação Ecológica de Jataí, município de Luiz Antônio, SP, Brasil

We estimate litter production and leaf decomposition rate in a cerradão area, physiognomy little studied and very threatened in São Paulo State. During the period of study, litter production was 5646.9 kg.ha-1.year-1, which the 'leaf' fraction corresponded to 4081.2 kg.ha¹.year¹; the 'branch' fraction, to 1066.1 kg.ha-1.year-1; the 'reproductive structures' fraction, to 434.1 kg.ha-1.year-1; and the 'miscellaneous' fraction to 65.5 kg.ha-1.year-1. Litter production was highly seasonal and negatively correlated with relative humidity and air temperature. Leaf production was negatively correlated with relative humidity, rainfall, and air temperature. There was no significant difference between litter production found in this study and those in two other sites with cerradão and semideciduous forest, but these physiognomies differed significantly from the cerrado sensu stricto. Leaf decomposition rate (K) was 0.56. Half-life of the decomposing material was 1.8 years and turnover time was 2.3 years.

O clown visitador no tratamento de crianças hospitalizadas

Universidade Estadual de Campinas. Faculdade de Educação Física

Educação fisica escolar : proposta para formação de lideres comunitarios para alunos de 2ª e 3ª series do ensino medio

Universidade Estadual de Campinas . Faculdade de Educação Física