Últimos itens adicionados do Acervo: Universidade Tecnológica Federal do Paraná

A Universidade Tecnológica Federal do Paraná (UTFPR) é uma universidade pública mantida pelo governo federal e sua sede esta localizada na cidade de Curitiba, capital do estado brasileiro do Paraná.

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‣ Sistema de ultra-som para caracterização de leite bovino

Dorabiato, Luiz Fernando
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
This work presents the design, development and tests of an ultrasonic milk analyzer. Milk analyzers are employed by dairy industry to evaluate the quality of acquired milk. Some of the assessed features are the fat content, solids non-fat and added water to the milk samples. These features are employed to estimate the production income of dairy products and milk adulteration. The system pumps a sample to the test cell, then the cell is warmed and the measurements are done at known temperature. Then, the system acquires the amplitude and the propagation time of the ultrasound pulse through the sample and correlates these acoustic parameters to the fat content, solids non-fat, proteins and added water in milk samples. The system showed good reproducibility, presenting low coefficient of variation (lower than 8.8%) for analysis of solid content in milk samples – fat, proteins and solids non-fat. The calibration tests presented determination coefficients between the acoustic parameters (attenuation and propagation time) and the milk components (fat content, solids non-fat, proteins and added water) higher than 97% (R2 > 0.97), with standard error of estimate lower than 1.25%, showing low dispersion of the experimental data in relation to the regression curves. To evaluate the developed prototype...

‣ Medidor de pressão e dose sonora

Gazzoni, Fernando Estevam
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The study of sounds and the influence it exerts in humans has intensified in recent decades due to the large number of vehicles and industries in the centers of large cities. The equipment used to characterize the sound and compare if it is within the technical standards is the sound intensity meter or sound level meter. The standards allow marketed since equipment that only measure the sound pressure level to equipment that show pressure level spectrum in frequency and mean pressure to which an operator was exposed during the workday. In Brazil, most sound level meters marketed that measure the sound pressure, the others are usually imported. The present work aims to create a prototype of sound level meters capable of measuring the sound pressure, characterize the signal measured in the frequency and calculate the dose to which an individual is exposed. We developed a sonometer type 2 with slow, fast and impulsive response curves, with spectral analysis using frequency filters and octave band weighting curves A and C. The testing software developed and the response of the developed circuit were performed using the C weighting curve, which is almost linear and therefore best to check the frequency response of the electronic circuit designed. In tests of noise dose and sound pressure level was used weighting curve A. For tests using periodic waves the results obtained with the sound level meter using the response curves of slow...

‣ Um sistema imune fuzzy cultural aplicado ao problema de despacho econômico de energia elétrica

Kuk, Josiel Neumann
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The main objective of this work is the proposal of a hybrid system based on Natural Computing approaches, which is capable of efficiently solving different instances of the Economic Load Dispatch problem of electrical energy with valve-point effect. For this purpose it is developed a new approach based on Cultural Algorithm, which has as its population space an Artificial Immune System. In the belief space, we use four knowledge types: situational, normative, topographical and historical. In the communication protocols, the acceptance function is dynamic and the principal influence function is based on a Fuzzy Inference System which defines the probable percentage of application of each knowledge type. Three instances of the Economic Load Dispatch with Non-smooth Cost Functions problem are used to evaluate the proposed paradigm. The results show that the introduction of fuzzy systems to support the decision of which type of knowledge must be applied can bring benefits to the obtained results. Although its parameters were not optimized for each case of study, the proposed algorithm performed likewise the state-of-the-art algorithms.; CAPES; Este trabalho tem como objetivo principal a proposição de um sistema híbrido baseado em Computação Natural que seja capaz de solucionar...

‣ Caracterização da deflagração da descarga eletrocirúrgica

Dias Junior, Elton
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Electrosurgical spark is the phenomenon that rules the main effects of electrosurgery, cut and fulguration. Previous studies have shown evidences that electrosurgical sparkling generates important voltages and currents asymmetries, despite the presence of the dc protection capacitance at the patient circuit. Those asymmetries can lead to undesirable electrostimulation and dc burns. The present study has investigated the characteristics of the beginning of the spark, or the very moment of its breakdown, according to electrodes geometries, submilimetric gap distances, atmosphere temperature, pressure and humidity conditions, and electrodes materials. It was possible to notice a qualitative resemblance between the dc breakdown and the ac characteristics from previous studies. This association and peculiarities of the electrosurgical sparks and organic electrodes material influence are analyzed. Furthermore, characteristics such as alterations that can take place during sparkling processes due to changes in organic tissue when it gets dried are also presented and analyzed.; A faísca eletrocirúrgica é o fenômeno que rege os principais efeitos da eletrocirurgia, o corte e a fulguração. Trabalhos anteriores forneceram evidências de que o processo da faiscância gera assimetrias importantes em corrente e tensão...

‣ Tomografia por coerência ótica: implementação e aplicações em fibras óticas

Saccon, Fernando Antonio Moura
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Optical coherence tomography is a high-resolution and non invasive technique that allows constructing three-dimensional images in real time and in vivo, with applications mainly in medicine. However, industrial applications of the OCT are promising although underexploited. This work presents a time domain optical coherence tomography system to characterize photorefractive devices in optical fibers. These devices are produced by the Grupo de Dispositivos Fotônicos e Aplicações at UTFPR for applications in the sensing area. The characterization of such devices is an important issue to improve the production process. The main advantage of OCT is the possibility to obtain high- resolution images and analyze qualitative and quantitatively parameters like refractive index and the modulation period of devices. We developed the mechanical parts of the system and the software for control and acquisition data in LabVIEW language. The software commands motors movements and collect data of the acquisition system. The results demonstrate the viability of the built system, enabling the visualization of the long period grating recorded with electric arc. Refractive index measurements of crystals were done, which obtained values are in good agreement with literature. Due the high sensitivity of the system it is possible to identify interfaces of a multimode optical fiber (in this case the core diameter is bigger than the system resolution) and the various interfaces – core...

‣ Segmentação de pele em imagens digitais para a detecção automática de conteúdo ofensivo

Kuiaski, Diogo Rosa
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
This work presents a study of suitable approaches for automatic detection of offensive content (pornography) in digital images. Extensive experiments were conducted for skin pixel segmentation, colour spaces and content descriptors. This work focus its efforts on skin pixel segmentation, since this segmentation is the pre-processing stage for almost every content-based offensive image classification methods in the literature. Four skin skin segmentation methods were tested in six colour spaces. Also, a structured image database was built to help improve studies in skin segmentation, with the possibility of adding meta-information to the images in the database, such as illumination conditions and camera standards. With the help of meta information from the image database, experimets involving illumination conditions and skin colour segmentation were also done. Finally, some feature extraction algorithms were implemented in order to apply content-based image retrieval (CBIR) algorithms to classify offensive images.; CAPES; UOL; O presente trabalho tem como objetivo estudar meios de efetuar a detecção automática de conteúdo ofensivo (pornografia) em imagens digitais. Para tal estudou-se largamente segmentação de pixels de pele, espaços de cor e descritores de conteúdo. Esse trabalho tem um foco maior na segmentação de pele...

‣ Comunicação cooperativa usando retransmissão parcial codificada, HARQ tipo-I e códigos LDPC

Brante, Glauber Gomes de Oliveira
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
In this master thesis we present a novel HARQ scheme for cooperative communication systems, called Coded Partial Retransmission (CPR). The method is based on the retransmission of only a fraction of the original codeword by the cooperating nodes, applying an appropriate power allocation. Numerical results using LDPC codes and Type-I HARQ with Chase Combining show that CPR outperforms regular cooperative HARQ techniques considering both AAF and SDF protocols. Additionally, we show that the CPR throughput, using a single relay, may be considerably larger than the throughput of some regular cooperative HARQ schemes using multiple relays.; CAPES; Nessa dissertação de mestrado apresentamos um novo método HARQ para sistemas de comunicação cooperativa, denominado Retransmissão Parcial Codificada (RPC). Esse método é baseado na retransmissão de apenas uma fração da palavra código original por parte dos nós cooperativos, aplicando a essa fração um ganho de potência apropriado. Os resultados numéricos utilizando códigos LDPC e HARQ Tipo-I com Chase Combining mostram que o RPC supera os esquemas HARQ cooperativos tradicionais considerando os protocolos AAF e SDF. Além disso, mostramos que a vazão (throughput) do RPC, utilizando apenas um único relay...

‣ Modelagem, simulação e análise do processo de produção do biodiesel brasileiro

Vendramin, Elton Joel
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
This work presents a simulation model for a biodiesel processing plant that fits the Brazilian case which utilizes soybean and cottonseed oils as major feedstocks. These pure oils or blends are modeled in this work according to a fatty acid expansion for each vegetable oil by considering abstract triglycerides with differentiated side chains. These components are characterized in the simulation by fundamental properties such as boiling point, molecular weight, density and critical temperature, pressure and volume. Some of them have reference values in the literature while others were estimated by Ambrose's group contribution method. In addition, two process flowcharts were modeled in steady state by using two different equipments for biodiesel downstream processing. In the first case, water washing and vacuum distillation columns are proposed. In the second case, there is a horizontal tank that represents a decantation unit followed by a vacuum distillation column. In both cases, reagents are fed to a continuous reactor where biodiesel plus glycerol conversion occurs. This conversion was modeled by using two different approaches. The first one considers a 95% fixed conversion while the second one uses kinetic data to describe the conversion as a function of reagents' concentration and temperature. The obtained results show the process efficiency for different feedstock compositions which are then used to accomplish a preliminary economic analysis. In addition...

‣ Uma proposta inter-camadas em redes sem fio múltiplos saltos para otimização e estabilidade de rotas

Kakitani, Marcos Tomio
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
In this master thesis an adaptive cross-layer solution for multihop wireless networks is presented. The main objective is to analyze the impact that the information exchange between network model layers can have on its overall performance. Connections quality information from physical layer is handled directly to the network layer, which may calculate better routes to be used by each node. This proposal was evaluated through simulations to be compared to other routes calculation models. Obtained results indicate more stable networks, with fewer dropped packets and lower jitter values.; CNPq; Nesta dissertação de mestrado é apresentada uma proposta adaptativa com abordagem intercamadas para redes sem fio de múltiplos saltos. O objetivo principal é analisar o impacto que a troca de informações entre camadas do modelo de rede podem ter sobre seu desempenho geral. Informações sobre a qualidade das conexões na camada física são passadas diretamente para a camada de rede, que poderá calcular melhores rotas a serem utilizadas por cada nó. Esta proposta foi avaliada por meio de simulações com o intuito de ser comparada com outros modelos de cálculo de rotas existentes. Os resultados obtidos indicam redes mais estáveis, com menor quantidade de pacotes perdidos e menores valores de jitter.; 5000

‣ Instrumentação baseada em redes de Bragg em fibra ótica para a monitoração da vazão de fluídos através do uso da termometria

Patyk, Rodolfo Luiz
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
In this work we inferred a fluid flow seeping from a cooper pipe through thermometers scheme in different flows, through the use of optical sensors based on temperature Bragg Gratings written in optical fiber (FBG). We used a non-intruse measurement process through the use of thermometry, which consists of monitoring the temperature at two fixed points with a know distance (d) on the outer wall of the tube. Besides the optical sensors of temperature, sensors were used for commercial temperature, thermocouples, with the objective of comparing the results obtained experimentally. In the experiment, the fluid is flowing at a temperature T1, and will be released at any given time a small volume of fluid with temperature T2, were T2 > T1, simulating a thermal pulse. It's monitored the evolution of the thermal pulse and noted the transit time (t) between the two temperature sensors. With the value of distance (d) and transit time (t) we obtain the average velocity of flow (v). Tenure velocity (v) and the tube transversal sectional area (A) we can infer the non-intrusive measurement technique flow. The flow though the use of thermometry was tested for different flow regimes: laminar, transitional and turbulent. We compared the values measured with the mass flow of the system with the experimental values for the sensors and commercial FBG's. In the turbulent the accuracy of measuring the speed and fluid flow was 0.75 to 0.60 optical sensors and sensor for commercial purposes. Finally for the laminar accuracy in the measurements were 0.98 optical sensors and 0.76 for commercial sensors.; Neste trabalho foi inferida a vazão de um fluido que escoava em um tubo de cobre através do uso da termometria em diferentes regimes de escoamento...

‣ Characterization of the spoilage lactic acid bacteria in “sliced vacuum-packed cooked ham”

Kalschne, Daneysa Lahis; Womer, Rute; Mattana, Ademir; Sarmento, Cleonice Mendes Pereira; Colla, Luciane Maria; Colla, Eliane
Fonte: Brazilian Journal of Microbiology; Campo Mourao; Medianeira Publicador: Brazilian Journal of Microbiology; Campo Mourao; Medianeira
Tipo: Artigo de Revista Científica
Português
The lactic acid bacteria are involved with food fermentation and in such cases with food spoilage. Considering the need to reduce the lactic acid bacteria growth in meat products, the aim of this work was to enumerated and investigated the lactic acid bacteria present on sliced vacuum-packed cooked ham stored at 4 °C and 8 °C for 45 days by phenotypic and molecular techniques. The quantification showed that the lactic acid bacteria were present from the first day with mean count of 1.98 log cfu/g for the four batches analyzed. The lactic acid bacteria grew rapidly on the samples, and plate counts around 7.59 log cfu/g and 8.25 log cfu/g were detected after 45 days of storage at 4 °C and 8 °C, respectively; storage temperatures studied showed significant influence on the microorganism in study growth. The predominant lactic acid bacteria associated with the spoilage samples at one day of storage includes Lactobacillus sp., the phenotypic overlap Leuconostoc/Weissella sp. and Enterococcus sp. At 45 days of storage at 4 and 8 °C the mainly specie was Lactobacillus curvatus, following by Lactobacillus sakei and Leuconostoc mesentereoides; the Enterococcus sp. was not present in the samples.

‣ Transdutor a fibra ótica para análise de biodiesel

Kawano, Marianne Sumie
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
This work presents a study of the applicability of long period gratings and long period gratings structures, written in silica optical fiber, when they are employed as a transducer of refractive index to analyze the biodiesel and their original oils. As samples were used: soybean oil, fried oil, sunflower oil, soybean oil biodiesel and biodiesel from sunflower oil. The experiments were performed using a conventional long period grating and a long period grating structure named as cascaded long period grating, in which a long period grating is employed on an interferometric configuration similar to a Michelson interferometer. Initially, were analyzed several samples of oil and biodiesel at room temperature. The results showed that when the devices were immersed in the different samples, which have refractive index equal or higher than that of the optical fiber cladding, the guiding light conditions no longer allow these devices for the use as a refractive index transducer. However, if the cascaded long period grating is used, when only the cavity of the Michelson interferometer or part of this cavity is placed in contact with samples, the devide shows a promising tool for checking the quality of biodiesel. Still trying to improve the performance of the cascade long period gratings...

‣ Um novo escalonador com controle de admissão de conexão para o padrão IEEE 802.16 com garantia de limite de atraso

Dosciatti, Eden Ricardo
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The IEEE 802.16 Working Group on Broadband Wireless Access is developing a standard for broadband wireless access networks in Metropolitan Area Network (MAN), also know as WiMAX. One of the features of the MAC (Media Access Control) layer is that it was designed to differentiate service among traffic categories with different multimedia requirements. Based on these assumptions and considering that the standard does not specify a scheduling algorithm, a new scheduler with admission control connection has been proposed based on Latency-Rate (LR) server theory and system characteristics specified by the standard for systems using the WirelessMAN-OFDM (Orthogonal Frequency Division Multiplexing) air interface. The proposed scheduling algorithm calculates the Time Frame (TF) in order to maximize the number of stations allocated in the system while guarantee the delay required for each user. Properties of this proposal have been investigated theoretically and through simulations. A set of simulations is presented with streams of Constant Bit Rate (CBR) and Variable Bit Rate (VBR) and performance comparisons with different delays and different TFs. The results showed that the upper limit of delay can be achieved by a variety of loads in the network...

‣ Metodologia de implementação de um laboratório de calibração de equipamentos médico-hospitalares

Fuck, Marcos Fabio
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Metrological control of health-care environmental equipment is essential for the assurance of their results. In Brazil, there is a lack of specific laboratories able to perform metrological control of such equipment. The purpose of this research is to introduce a methodology to establish the infrastructure and laboratory calibration modus operandi for medical equipment. The developed proposal is based on the requirements of ABNT NBR ISO/IEC 17025 standard, officially adopted by INMETRO, besides other specific publications about medical equipment management, and laboratories certification criteria established by ANVISA. The achieved results are: a guideline for the establishment of a medical equipment uncertainly measurement; a calibration procedure for sphygmomanometers; and performance indicators for the laboratory. The resultant methodology allows the laboratory candidate to reach its accreditation goal up to INMETRO and ANVISA, with an approach which covers the definition of the laboratory area, its politics and responsibilities, documentation and accreditation requirements. Then, the process to obtain the qualification of a calibration laboratory will be reached, fulfilling the existing gap in the quality system of health-care environment.; O controle metrológico de equipamentos utilizados nos ambientes de saúde é essencial para a garantia dos resultados relatados. No Brasil...

‣ Avaliação da vibração e ruído ocupacionais no fresamento de pisos industriais

Gonçalves, Felyppe Blum
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The constant change in the means of work is done by technological and industrial developments. However, with the advent of such innovations, hardly the work of the industry is not subject to a variety of occupational hazards resulting from production processes. Given this context, the present study aimed to monitor the working hours of the employees of a company in the construction industry, specializing in industrial floor maintenance and renovations, as exposure of vibration and noise on two fronts work in the cities of Curitiba - PR and São José dos Pinhais – PR. The program took place in two locations and on different days. The workday adopted by the company is six hours daily. For the evaluation of vibration, we used accelerometer with the worker and coupled to the handle of the equipment object of study, a mill floor, triaxial sensor subsequently the data were processed and compared with the new text of Annex No. 08, NR 15, submitted for public consultation by the Ministry of Labour and Employment in the months of January and February 2014. As for noise measurement used a dosimeter with the worker, whose final results enabled comparison with the regulatory norm 15 - Annex No. 01. The final results indicate excessive exposure to the tolerance specified by the legislation...

‣ Utilização do sistema de informação geográfica (SIG) na indicação de possíveis áreas aptas à disposição de resíduos de construção e de demolição

Biju, Bárbara Pavani
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The construction and demolition (C&D) waste when do not have a proper final disposal; result in social, economic and environmental problems. The disposal often happens in inappropriate locations and demonstrates the necessity of adequate areas for the waste final disposal but also the selected site must be in accordance with local standards and regulations. Considering all these facts, the aim of this work is to indicate possible suitable areas for C&D waste landfill, using the Geographic Information System (GIS) tool, supported by Multi-criteria Decision Analysis (MCDA). The GIS used as a basic tool to identify possible suitable areas has several advantages: low cost; faster decision-making process and various scenarios can be analyzed simultaneously, being a valuable tool in all the construction and demolition waste management steps. Integrating GIS with MCDA has resulted in the indication of possible suitable areas for C&D waste disposal, having as a study area the Urban Central Core of Metropolitan Region of Curitiba. Keywords: Geographic Information System. Co; CAPES; Os resíduos oriundos da construção e demolição quando não têm uma destinação final adequada acarretam em problemas de ordem social, econômica e ambiental. O descarte que muitas vezes acontece em locais inapropriados...

‣ Diagnóstico dos sistemas de gerenciamento de resíduos de construção civil em Curitiba

Mann, Daniela Carnasciali de Andrade
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Waste management deficiency causes various problems like irregular landfill, water and air pollution, population health, soil and water contamination. For over a decade waste laws are in place and being updated in order to mitigate the impacts of RCC's. The main objective of the present work consists of investigate a technical and legal compliance of waste management systems of construction in Curitiba, State of Paraná. For this, a checklist has been drawn up based on current laws and models of environmental certifications. 24 civil constructions were visited and applied this checklist in each one in each one of them for it to be possible to make the analysis of the data. Even waste management is mandatory and limiting for obtaining CVCO through this diagnosis was verified that the systems adopted are failed, there is a lack awareness and that the apparent document compliance does not translate into effective management of RCC.; A deficiência na gestão de resíduos causa diversos problemas como os aterros irregulares, poluição da água e ar, saúde da população, contaminação dos solos e da água. Há mais de uma década legislações estão vigentes e sendo atualizadas com o intuito de amenizar os impactos decorrentes dos RCC’s. O objetivo principal do presente trabalho consiste em investigar a conformidade técnica e legal de sistemas de gerenciamento de resíduos de construção civil na cidade de Curitiba...

‣ Estudo da degradação do óleo lubrificante em motores alimentados com biodiesel B100

Pereira, Flávio Marcos de Melo
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
The increasing levels of pollution in urban centers have induced the adoption of mitigating measures in order to reduce negative consequences. In Curitiba, Southern Brazil, the office that regulates urban passenger transport in the city has promoted the use of pure biodiesel (B100) as fuel for a fleet of 34 buses. However, as this measure was put into practice, concerns related to a possible reduction of engine service life were raised, thus forcing the vehicles-owner companies to adopt a conservative maintenance plan, which doubled the frequency of lubricant oil replacement. This was the opportunity for the present study, which aimed to define on a scientific basis the frequency of lubricant oil replacement in engines fueled with biodiesel B100. In order to characterize both the evolution of lubricant oil degradation, as well as the deterioration of lubricant performance due to the use of biodiesel B100, samples of engine lubricant were collected and analyzed along 18 months. Additionally, aiming to confer statistical representativeness to collected data, a population of 7 buses was considered, four of these being fueled with biodiesel B100, while the other 3 with conventional diesel fuel, thus the latter group served as a reference for comparisons. The following parameters of the lubricant oil were measured and analyzed: viscosity...

‣ Formação e assimilação de conceitos científicos com abordagem da educação ambiental na educação infantil

Weirich, Ligiane Marcelino
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Acompanha: Formação e assimilação de conceitos científicos com abordagem da educação ambiental na educação intantil; This dissertation came of concern about the way scientific learning is approached in childhood education. It shows a how the children construct the meaning of scientific knowledge starting from environmental reality they live, emphasizing the observation and the perception of this environment. It is a qualitative research and the conception of research utilized is the investigation so that the teenagers reflect on your practice with the goal to transform it. The set of activities made have been four didactic projects (DP, or PD in portuguese) and the didactic sequences (DS, SD in portuguese), based on learning theory fundamentals of the meaning, considering the David Ausubel's propositions and collaborators and the scientific culture focused on critical environmental education. The data analysis obtained throughout the instruments utilizes to take them like: audio records, written records on the field notes, text productions, draws and text made by children (attempt to write) conducted to realize the children learn by reception and discovering, able to form and assimilate concepts when create new relevant conceptions to use in cognitive structure a cognitive bridge for new learning. As result of this research was elaborate a blog...

‣ O ensino de ecologia mediado pelo conceito unificador energia: o biodigestor enquanto modelo didático para uma abordagem interdisciplinar

Silva, Zenilda Ribeiro da
Fonte: Curitiba Publicador: Curitiba
Tipo: Dissertação de Mestrado
Português
Acompanha: O ensino de ecologia mediado pelo conceito unificador energia: o biodigestor enquantomodelo didático para uma abordagem interdisciplinar; This work held through a participant observation research, seeks to instrument for the teaching of Natural Sciences (CN) involved young people from regular high school to a public school in Araucaria -PR. The objective was to establish strategies for use of common concepts in the CN, such as the matter energy, which, because they have a highly interdisciplinary feature, can be worked in the classroom in various disciplines. Thus demonstrates the possibility to deepen and widen the discussions on this concept in biology courses, however, emphasizing also the language of these contents in other CN. To achieve this goal it was proposed to build a pedagogical didactic model of biodigester that supported the theoretical content expository mode of working in the classroom. The work presented here was designed to contemplate the two fundamental axes recommended by NCP to the CN teaching: contextualization and interdisciplinarity. The contextualization occurred in two ways: through discussion in the classroom about a local industry, related to the topic discussed, and for conducting experiments that allowed the visualization of the formation of gas due to the decomposition of organic matter used in biodigester. The interdisciplinarity...