ISBN: 978-65-994975-8-2
Autores – Ruan Carvalho Mayworm, Rodrigo P.B. Costa-Felix, André V. Alvarenga, Stuart Davidson, Emily Webster
Palavras-chave: Kibble balance, uncertainty, 3D printer
Resumo: Due to the International System of Units (SI) redefinition in 2019, the kilogram is now based on the Planck constant and no longer related to a physical artefact, the international kilogram prototype (IPK). The Kibble balance is one of the experiments which will be used to realise the redefined kilogram and relates mass to fundamental electrical standards. The present work demonstrates a prototype of a Kibble balance, developed at Inmetro’s Ultrasound Laboratory (Labus), using 3D printing and a Raspberry microcontroller. The prototype showed the ability to measure masses at the milligram level (100 mg to 600 mg) at a relative uncertainty of 7 %.
Autores: Thiago Antônio B. Milhomem, Zemar Martins D. Soares
Palavras-chave: microfone de medição, sensibilidade, resposta em frequência, norma
Resumo: Este artigo apresenta uma revisão dos microfones de medição do tipo capacitivo. Inicialmente, é descrito o seu princípio de funcionamento. Seguindo, são discutidas as suas principais características: sensibilidade de circuito aberto, resposta em frequência, faixa dinâmica, direcionalidade e fase. Por fim, é apresentado o conjunto de normas da IEC (Comissão Internacional de Eletrotécnica) que apresenta as especificações para microfones utilizados como padrão de laboratório e para os microfones utilizados como padrão de trabalho e que descreve os métodos para a determinação da sensibilidade e da resposta em frequência.
Autores: Rafaela Siqueira de Grijp, Rodrigo P.B. Costa-Felix
Palavras-chave: Ultrasonic power, Atmospheric pressure, Mass
Resumo: Ultrasound is present in everyone’s life daily, from medical applications to diagnostics as used in industry. Medium-frequency ultrasound (1 to 5 MHz) is regularly used in medicine for therapeutic purposes, and its effects depend on the application applied to achieve the expected result. Knowledge about the application applied to clinical practice is necessary since, if misused, it can have adverse effects, making the treatment ineffective, putting the physical integrity of the user and operator at risk. It is possible to determine the ultrasonic power through the measured mass since this quantity is indirectly linked to ultrasonic power. Although there is a methodology for calibration, the high cost due, such as a specialized technician and specific measuring instruments, make it difficult to maintain equipment maintenance, sometimes keeping them out of technical specifications for long periods. A reliable, low-cost, and more accessible methodology to provide preventive care routinely by physical therapists would be of utmost interest. The present study aims to experimentally verify whether a variation in atmospheric pressure impacts the results of ultrasonic power agreement using a semi-analytical scale to establish an accessible methodology as a power reference. It can be seen that the results of the measured power mass do not change as a function of atmospheric pressure. The average power value is within the limit specified by the IEC 61689 standard.
Autores: Pâmella de Assunção Oliveira, Raphaela de Melo Baesso e Silva, André Victor Alvarenga, Rodrigo P.B. Costa-Félix
Palavras-chave: Metrology, Speed of sound, Biodiesel, Contaminant analysis, Glycerol.
Resumo: Biodiesel is a renewable fuel, biodegradable and alternative to diesel oil consisting chemically of fatty acid alkyl esters and obtained by the transesterification reaction. After transesterification, undesirable components may remain in biodiesel. The presence of these components negatively influences the properties and performance of biodiesel. This research aims to evaluate biodiesel quality, using the quantitative ultrasound technique to determine the presence of the contaminant glycerol in biodiesel samples. The blends used in this study consisted of biodiesel and glycerol varying from 0 % to 0.5 % of glycerol by mass. The measurement uncertainty was evaluated according to the Guide to the Expression of Uncertainty in Measurement. The speed of sound in biodiesel/glycerol blends was measured by the pulse-echo technique (@ 5 MHz) and was considered equivalent for the different concentrations studied. The maximum measurement uncertainty obtained was 2.2 m·s -1 (0.16 %).
Autores: Luis Ricardo Soares, Rodrigo Pereira Barreto Costa-Felix, Celso Barbosa de Sant’Anna Filho
Palavras-chave: Photoacoustics, chromatography, nitrous oxide, metanalysis
Resumo: Air pollution is a severe problem that affects all regions of the planet. Its origins can be natural or anthropic, that is, caused by the actions of human beings. Nitrogen-based pollutants are gases capable of damaging the ozone layer and harming the population’s health, so taking measurements online is essential. Photothermal techniques can be used for this purpose. Thus, this article aimed to evaluate the efficiency of the photoacoustic method for the analysis of nitrous oxide through meta-analysis. With the studies participating in the meta-analysis, it is observed that photoacoustics has several advantages over chromatography, further demonstrating that the technique is capable of efficiently measuring nitrous oxide gas.
Autores: Gissele Mª C. Nogueira, Alexandre Mendes, Rodrigo P. B. Costa-Félix
Palavras-chave: Synthetic ropes; textile industry; quality control; process optimization; measurement.
Resumo: With the increase in the global competition in conjunction with the country’s current economic situation, the need to optimize industrial processes becomes even more evident. The improvement in reliability, quality, and productivity provides even more competitive environments. This work aims to improve the most critical part of the production process of synthetic fiber ropes. Since 2019, about 3 tons (5.3%) of the production of a synthetic fiber ropes manufacturing industry located in Baixada Fluminense – RJ (Brazil) was discarded by dimensional control. In 2020 it was evidenced the discard of about 4 tons (12%) of production. The most critical stage is in the intermediate process of producing the strands that make up the rope, so the main focus of the control of measures will be at this stage of the process. A parallel measurement methodology will be implemented to verify and correct possible variations. The instrument is a counter with an inductive sensor connected to a flywheel pulley that will be in contact with the material to be produced. The measurement will be performed by the ratio of the number of pulses, the geometry of the pulley, and a correction factor, if necessary.
Autores: José Ricardo Ferreira Oliveira, José Aguiar dos Santos Junior, Vinícius Soares Medeiros, Gilmar Guimarães
Palavras-chave: Thermophysical property, Steady State, Experimental apparatus,
Heat flux measurement, Uncertainty quantification.
Resumo: The aim of this work is to measure the thermal conductivity of nylon 66, using a steady-state temperature field. To this end, an experimental apparatus was designed to provide the fundamental conditions for one-dimensional heat conduction, under steady state. The boundary conditions were assumed as type 2 on the upper face and type 1 on the rear face of a plate-form sample. A heat flux sensor was placed on the center of the upper face to measure a constant heat flux supplied by electrical resistance. Two type-k thermocouples were positioned to measure the temperature drop between the plate faces. Then, these measures are replaced into a mathematical model to determine the thermal conductivity of the material under analysis. The uncertainty assessment using the Monte Carlo method indicates low dispersion of the thermal conductivity, about 2.00 %, at a confidence level of 95.45 %. This indicates a good precision of the experimental apparatus developed, enabling its application with other non-conductor materials, when the conditions established in the mathematical modelling are strictly followed.
Autores: Gustavo Palmeira Ripper, Cauê Doval Ferreira, Ronaldo da Silva Dias, Giancarlo Barbosa Micheli
Palavras-chave: comparação interlaboratorial, CMC, calibração em vibrações
Resumo: O presente trabalho busca apresentar a evolução tecnológica no Laboratório de Vibrações do Inmetro que possibilitou a obtenção de excelentes resultados em recentes comparações chave interlaboratoriais, o que por sua vez, culminou no reconhecimento internacional das capacidades de medição do laboratório, consolidado na publicação em 2020 da nova lista de Capacidades de Medição e Calibração – CMC. Esta apresenta considerável ampliação de escopo, com extensão de faixas de frequência e inclusão de novos serviços metrológicos na área de vibrações.
Autores: Tiago Costa Dourado, Felipe Dias Gomes dos Santos, Ericles William Jesus dos Santos, Robson Luiz Gaiofatto, Rodrigo P.B. Costa-Félix
Palavras-chave: Ultrasonic; concrete; metrology; non-destructive testing
Resumo: The correlation between ultrasonic pulse velocity (UPV) and the quality of concrete parts is a resource that has been explored for decades. However, the significant variability of production of these constructive materials tends to require more robust techniques for better reliability of results. This work adopts a metrological approach in the correlation of the ultrasonic pulse velocity and the respective compressive strength values through destructive tests, evaluated in the first ages (7, 14, 30, and 90 days). For this analysis, three different concrete mixes were molded into cylindrical shapes, using different proportions of the inputs that make up this material. After undergoing statistical and metrological treatment, the results obtained allowed to identify a similar behavior of UPV growth with the strengths of the concrete samples, especially when analyzing the measurement uncertainty bars. However, it is noteworthy that it is necessary to expand the tests in a more significant number of concrete mixtures. It is expected that the improvement of these tests can help reduce costs and execution times of concrete structures where stripping depends on the strength achieved.
Autores: Raquel Monteiro Souza, Rodrigo Pereira Barretto da Costa-Félix, André Victor Alvarenga
Palavras-chave: Ultrasonic velocity, Agar phantom, Tissue-mimicking material
Resumo: The present paper studied the metrological impact on the ultrasound group velocity in not storing the agar phantoms in the water-glycerol-benzalkonium chloride maintenance mixture. The ultrasonic velocity and the phantom’s thickness were measured by the pulse-echo technique seven times within 45 days, whereas four replicates were carried out under repeatability conditions. The phantom’s thickness did not differ statistically along the days since the normalized error was less than 1.0. Based on the results obtained, one can conclude that the ultrasound group velocity decreased in a logarithmic function along the days.
Autores: Rodrigo Ornelas de Almeida, Edisio Alves de Aguiar Junior, Rodrigo Pereira Félix
Palavras-chave: CNG, Legal Metrological control, Fuel Stations
Resumo: This study presents a joint operation conducted by Inmetro and IPEM-RJ carried out between June 10th and 14th, 2019 at seven compressed natural gas (CNG) fueling stations with the objective of carrying out a survey on the conditions of the installed meters. This survey observed the conservation conditions of the installed meters and its measurement errors caused by problems in the programming of these meters. Additionally, the economic impact of these measurement errors was also calculated, as well as actions were suggested in order to minimize the problems found.
Autores: Ivan L. M. Silva, Guilherme A Garcia, Luiz Vicente G Tarelho, Walter O. Junior
Resumo: Neste trabalho será apresentado o procedimento utilizado para a verificação do desempenho e ajuste da base de tempo do padrão frequência de quartzo, disciplinado por GPS, que fornece o sinal de 10 MHz utilizado como referência pelo pente de frequências ópticas, que vincula a realização da unidade metro a unidade de tempo do SI, o segundo, dentro da estrutura da nova cadeia nacional de rastreabilidade da unidade da grandeza comprimento.
Autores: BRUNO MASCARENHAS LOZANO, Klaus Natorf Quelhas, Luiz Vicente Gomes Tarelho
Palavras-chave: Open zinc freezing point cell, zinc cell, fixed-point, thermometry, temperature, ITS-90
Resumo: Fixed-point cells have been used as reference standards in calibrations of the thermocouples and standard platinum resistance thermometers (SPRT) in the Thermometry Laboratory (Later) of Inmetro, reproducing the International Temperature Scale of 1990 (ITS-90). The zinc freezing point (419.527 °C) is one of the 17 defining fixed points defined in the ITS-90. This article presents an open zinc freezing point cell manufactured at Inmetro, describing the constructive characteristics, the manufacture method, the cell evaluations, the comparison with other cells and the estimated uncertainty attributed to the cell temperature.
Autores: Mario Anselmo Pereira Neto, Pedro Henrique Fernandes Diniz, André Gomes Torres, Amaury Roteger de Oliveira, Klaus Natorf Quelhas
Palavras-chave: Ice point, reproducibility, temperature, uncertainty, thermometry
Resumo: Despite being classified today as a secondary reference point of temperature, ice point (0.0 °C) is still very important in many thermometry applications due to its simplicity, effectiveness, reproducibility and low cost. Uncertainties as low as some hundreds of microkelvin can be achieved, but it depends on the level of care of the experimental procedure practiced by the laboratory. The Thermometry Laboratory of Inmetro (Later) has adopted for a long time a conservative value available in literature for the uncertainty of the ice point. In order to reach more realistic results, in line with the specific equipment and experimental procedure of the lab, a study on the reproducibility of the ice point realization was conducted, enabling a significant reduction of the uncertainty previously adopted. In addition, from the uncertainty analysis performed, it was possible to show the great importance of the standardization of the ice bath preparation procedure for the achievement of better results.
Autores – Regis P Landim, Vinícius C de Oliveira, Helio R Carvalho, Werickson F C Rocha, Rodrigo P.B. Costa-Felix
Palavras-chave: digital transformation, quality infraestructure, new technologies, industrial revolution
Resumo: The paper presents the concepts of digital transformation from regarding metrology point of view. Also, the context of digital transformation is illustrated from the historical point of view of the Fourth Industrial Revolution and its economic importance. The main goal of this paper is to present an essential background to understanding digital transformation in metrology and its enabling/disrupting technologies: CPS, IIoT, digital twin, AI, metrology in simulation, cloud computing, metrology cloud, big data, virtual instrumentation, D-SI and DCC.
Autores: Isabele Antunes Dal Pont, Fernando Rodrigues Santos, Perison Pavei Uggioni
Palavras-chave: Estação Meteorológica Automática, Internet das Coisas, Sistemas Embarcados, Transmissão de dados, Computação em Nuvem.
Resumo: Este artigo apresenta o desenvolvimento de uma estação meteorológica automática baseada em Internet das Coisas e abastecida por energia solar, tendo como objetivo contribuir com informações meteorológicas locais. A estação é capaz de medir cinco variáveis e integra quatro subsistemas, que realizam a coleta de dados, transmissão sem fio, armazenamento em banco de dados, processamento com computação em nuvem e apresentação das informações por meio de uma aplicação web. Ao final do desenvolvimento foi realizada a calibração do sistema em campo, com a estação em funcionamento. Os resultados obtidos são apresentados neste artigo junto com as conclusões do projeto.
Autores: Hellen de Aguiar Souza Marques, Rodrigo P. B. da Costa Félix, Regis Pinheiro Landim
Palavras-chave: welding, electric power, measurement uncertainty
Resumo: Welding is a vital process for the industry, being present in most production chains. However, the absence of general solutions for welding processes becomes an object of study to develop and improve welding techniques and quality inspection tests. The purpose of this work was to metrologically evaluate the welding electrical parameters (voltage, current and electrical power) for the adequate supply of welded specimens for the evaluation project of ultrasonic inspections through machine learning. Initially , we sought to ensure the metrological traceability of measurements through the use of a portable data acquisition system during welding. The data were evaluated quantitatively, through calculation of measurement uncertainties, and qualitatively, through visual inspection and x-ray, showing different results of electrical welding power for each welded specimen. These results demonstrated the possibility of characterizing variations in voltage, current and electrical power, providing electrical limits that allowed obtaining approved specimens.
Autores: Roger Brendo Almeida de Medeiros, Pedro de Araújo Gentil Alencar, Igor Lopes de Andrade
Palavras-chave: incerteza de medição, calibração, torquímetro.
Resumo: Os requisitos básicos para calibração de torquímetros são declarados na norma ABNT NBR ISO 6789:2009, onde são apresentadas as principais características para a calibração como um todo. Contudo, de acordo com essa norma, a forma como escolher e analisar cada um dos fatores que influenciam na incerteza de medição é de responsabilidade do laboratório de metrologia. Portanto, esse artigo tem como objetivo analisar e sugerir fontes de incerteza no método de calibração de torquímetros com célula de carga uniaxial, e calculá-las utilizando o coeficiente de sensibilidade.
Autores: Felipe dos Anjos Rodrigues Campos, Lucas Melo Queiroz Barbosa, Felipe Chagas Rodrigues de Souza, Elberton Santos Castro, Weber Sebastião da Silvac
Palavras-chave: Método de Monte Carlo, Incerteza, termopar, Arduino
Resumo: Entre os métodos para a aferição de temperatura, os termopares são os mais utilizados, devido a combinação de baixo custo, altas faixas de medição e uma precisão relativamente boa. No entanto, a correta medição e levantamento das fontes de incerteza são de suma importância para a confiabilidade e rastreabilidade dos valores obtidos com esses sensores, devido a grande influência do sistema de aquisição na variabilidade das leituras. O foco desse trabalho foi avaliar as incertezas de um sistema de medição de temperatura de baixo custo, utilizando um termopar do tipo K conectado a um módulo amplificador e microcontrolador Arduino®. A calibração e correção foi feita com base nas temperaturas de congelamento e ebulição da água. Através da aplicação do Método de Monte Carlo conforme as orientações do GUM, foram levantados os modelos matemáticos para cada etapa dos procedimentos de calibração e medição, e as incertezas padrão combinada e expandida foram obtidas após simulações numéricas com 500 mil interações no Matlab. Apesar da incerteza de calibração ter sido o fator mais significativo, o sistema apresentou estabilidade satisfatória. A incerteza total foi de 4.70 °C, indicando bom custo benefício comparado a soluções tradicionais. A metodologia utilizada serve de refeência para medição de incerteza em sistemas semelhantes, favorecida pela fácil implementação das rotinas de cálculo, e incentiva a maior padronização dos processos de medição para a indústria e pesquisa, em conformidade com as normas internacionais.
Autores: Sandro Aureliano Miqueleti, Rodrigo P.B. Costa Felix
Palavras-chave: calibration, periodicity
Resumo: The assignment of calibration intervals shall be a formal process based on the results of previous calibrations. With the coronavirus pandemic, one means to avoid a non-conformity instrument and ensure an updated calibration program is to extend the calibration interval of laboratories equipment. The ILAC-G24 has published guidelines for that purpose. What can be done if an extension on the calibration validity is further than previously defined? This article presents a way to increase instrument uncertainty and extend the calibration period based on ISO Guide 35, applying a trend analysis and stability criteria of the reference material properties to the case of a measurement system.
Autores: Bruno Gomes Soares, Rodrigo P.B. Costa-Félix, Mila Rosendahl-Avelino
Palavras-chave: Calibration, Liquid, Microfluidics, Microvolumes.
Resumo: Numerous microsyringes and infusion pumps are used to apply medication to patients and in laboratories to carry out experiments. This work aims to observe the difference of the nominal value, comparing it with the value measured using a microsyringe and an infusion pump. A metrological calibration of a microsyringe and infusion pump in the range of 130 µL to 210 µL was performed. The procedure can be used for any calibration range, the ranger was chosen only to express the application of the study. Experiments were done using the gravimetric method ISO 4787 (2010) and the respective uncertainties, converting mass to micro volumes. The liquid used for calibration was double distilled.
Autores: Diogo da Silva Borges, Rodrigo P.B. Costa-Félix, Deise Diana Lava, Maria de Lourdes Moreira
Palavras-chave: Aging Analysis, Uncertainty Propagation, Principal Component Analysis
Resumo: The analysis of systems aging has a fundamental role in quality assurance and the reliability of processes and operations. The adoption of methodologies capable of predicting the availability of systems susceptible to aging is essential for this. Thus, the paper presents a method capable of predicting a system’s behavior based on its degradation caused by aging. Predictive and statistical analysis techniques were used, such as Fault Tree and Fussel-Vesely Techniques, Principal Component Analysis, and the Monte Carlo Method. The proposed methodology considers uncertainties associated, which is a determining factor in quantifying the probability of systems failure. As a result of the proposal, the paper presents a model capable of detailing the behavior of a system, adopted as an example application case, and the contribution of its components to its unavailability, according to Weibull’s Probability Density Function. The present paper has relevance regarding studies and research about aging, indicating a way for analysis and applications in installations that require high reliability of equipment and systems.
Autores: Bruno Amado Rodrigues Filho, Alexandre Nixon Raulino Soratto, Léssio Lourenço Nunes, Carlos Otávio de Almeida Afonso
Palavras-chave: economic distortion , legal metrology, fuel dispenser.
Resumo: The economic distortion represents the monetary unit involved in measurement deviations in trade. The greater are the deviations of measuring instruments used in the market, the greater are the money under uncertainty in the economy. That market asymmetry can be reduced by legal metrology processes, decreasing losses to both seller and buyers, ensuring trust. The Brazilian National Metrology Institute, Inmetro, in 2021, introduced the economic distortion as one of the indicator to evaluate the performance of legal metrology services. The preliminary results were obtained for the fuel market, showing that the economic distortion in 2019 and 2020, represented R$ 87,3 million for the final demand.
Autores: Ricardo Luís d’Ávila Villela
Palavras-chave: avaliação da conformidade; incerteza de medição; análise de risco; risco econômico
Resumo: Um dos desafios na área de avaliação da conformidade é a determinação do critério de aceitação que minimize o risco econômico total provocado pelos riscos de falsa aceitação e falsa rejeição de itens. A técnica de análise de risco econômico apresentada neste trabalho foi utilizada para determinar o critério ótimo de aceitação, mas também pode ser aplicada para indicar processos que têm um alto potencial de retorno de investimento pela implementação de melhorias na produção, no plano de amostragem de aceitação e na medição dos itens inspecionados. Esta técnica identificou o critério de aceitação com o menor risco econômico total e permitiu quantificar os riscos econômicos do consumidor e do produtor para o lote inspecionado.
Autores: Iris Trindade Chacon, Janaina Tavares Goulart de Sá Belchior de Oliveira, Rodrigo Otávio Ozanan de Oliveira, Rodrigo P.B. Costa-Félix
Palavras-chave: risk analys, conformity assessment; legal metrology; flowmeter
Resumo: Volume measurement of manufactured liquids and liquid raw materials carried out by road tankers (RT) is usual and has economic relevance, justifying the need to ensure metrological reliability. It requires some actions, including choosing suitable standards. In this scenario and considering the practice for type evaluation of measuring instruments, the article proposes a case study, analyzing performance data from a positive displacement meter, a measurement principle widely used as a standard in RT verifications. Current criteria of legal metrology were used: for the 0.3 accuracy class, the maximum permissible error (MPE) is 0.2%. The meter was tested with three different fluids (with different viscosities), and measurement errors were contrasted with the MPE specification, being considered compliant in all situations. On the other hand, risk analysis tools for conformity assessment were incorporated (JCGM 106) based on the different consumer risks, the formulated decision rule, and the measurement uncertainty. Even though, when including the risk analysis, the flowmeter was considered non-compliant, showing the need for a better basis decision using measurement uncertainty in legal metrology actions.
Autores: Jessyca G D Silva, Andre V Alvarenga, Rodrigo P.B. Costa-Félix
Palavras-chave: therapeutic ultrasound;calibration; questionnaire
Resumo: Despite several scientific proofs about the success of using therapeutic ultrasound for different therapies, there are also reports of failures and ineffectiveness in applied treatments. Much of this failure is due to the poor working conditions of the ETUS equipment used, which causes the reduction or absence of therapeutic effects. This survey asked professionals about the methods they use and the methods they know and are available on the market to test their equipment through a questionnaire. This study aimed to discuss, for the metrological perspective, the use of ultrasound physiotherapy equipment in Brazil. A problem for the metrological reliability of ETUS is related to the lack of metrological culture among users, who do not adopt procedures to assess their equipment, often because they are unaware of its importance and need. Periodic checks on equipment would give physiotherapists a resource with greater reliability and possibly more efficient therapies.
Autores: Cristol de Paiva Gouvêa, Thiago Menegotto, Joel Franceschini
Palavras-chave: metrologia legal, verificação, supervisão, bomba medidora
Resumo: Este trabalho reúne dados obtidos pelas equipes técnicas integrantes da RBMLQ-I nas ações de verificação e de supervisão em bombas medidoras de combustíveis líquidos no Brasil entre janeiro de 2018 e março de 2021. Demonstra-se estatisticamente que as atividades técnicas são majoritariamente concentradas nas ações de verificação, contudo as ações de supervisão resultam em um aumento de 50 % na detecção de irregularidades associadas a erro de volume, em prejuízo ao consumidor, e de até 360 % em outras irregularidades de grande impacto à confiabilidade metrológica. Palavras-chave: metrologia legal, verificação, supervisão, bomba medidora.
Autores: Joel Franceschini, Cristol de Paiva Gouvêa
Palavras-chave: Inmetro, RBMLQ-I, metrologia legal, instrumentos de medição
Resumo: O controle metrológico legal de instrumentos de medição é uma atribuição do Inmetro executado também pelos órgãos da RBMLQ-I. As irregularidades identificadas resultam na aplicação de penalidades aos infratores. Nas verificações iniciais poucos instrumentos apresentam índices de reprovação significativos e nas verificações subsequentes os percentuais são mais elevados em determinados grupos. Dentre os instrumentos com mais irregularidades estão cronotacógrafos e taxímetros, que juntos representam 2/3 do total das irregularidades, e as seis principais de cada grupo de instrumentos concentram de 62,2 % a 99,7 % do total das irregularidades identificadas no período analisado.
Autores – Alessandra Faria-Campos, Handressa Pereira-Fêu, João Vinícius Nóia, Aurea Folgueras-Flatschart, José Mauro Granjeiro, Sérgio Campos
Palavras-chave: BPL, Boas Práticas de Laboratório, LIMS, Gestão de dados biológicos
Resumo: Good Laboratory Practices – GLP, are a set of principles that define a quality system. They have been designed to ensure that laboratory experimentation is performed appropriately. Quality management systems in general and GLP compliant ones in particular are becoming more important every day. GLP compliance facilitates the acceptance of data in the context of regulatory processes where authorities have to assess the safety of new products. As a consequence, it is an important tool to overcome technical export barriers to OECD member countries. However, compliance to these systems can be complex. As a consequence, many laboratories are unable to implement GLPs in their daily activities risking to lose competitiveness in the market. In this work we present BPL++, a Laboratory Information Management System that assists in implementing GLP compliance in laboratories. BPL++ is an efficient and easy to use system with a Web based interface. It can simplify GLP adoption and increase laboratory competitiveness. BPL++ has been evaluated by GLP experts and is currently being used at INMETRO.
Autores: Luciana e Sá Alves, José Mauro Granjeiro
Palavras-chave: Educação em Metrologia; Conmetro; Educação Formal, Educação Não-Formal, Educação Informal
Resumo: O objetivo do artigo é apresentar as diretrizes estratégicas para o ensino de metrologia no Brasil estabelecidas desde o ano de 2003 e provocar uma reflexão sobre a importância com que o tema é tratado nos documentos de referência e sobre as ações implementadas a partir destas diretrizes. Essa reflexão é fundamental neste momento, tendo em vista que as novas diretrizes estratégicas serão discutidas e publicadas no ano que vem, cobrindo o período entre os anos de 2023 a 2027. O Congresso Brasileiro de Metrologia é o fórum privilegiado para tal discussão no país. A metodologia utilizada foi o levantamento bibliográfico. A reflexão feita após o estudo das quatro edições já publicadas do documento Diretrizes Estratégicas para a Metrologia Brasileira mostrou que há 18 anos o mesmo texto é utilizado para constituir o capítulo dedicado ao ensino de metrologia.
Autores: Handressa Pereira Fêu Laviola, Aurea Valadares Folgueras Flatschart, José Mauro Granjeiro
Palavras-chave: Biotecnologia, Biologia, gestão da qualidade, graduações,
Resumo: The biotechnology sector is constantly growing; this is evident when we observe the sector’s demand for financial investments and international cooperation. In parallel, the need for professionals to work within a quality management system adequately is also growing. Brazilian bachelor’s in biology and Biotechnology are allowed by the Federal Council of Biology (FCB) as biotechnologists without specialization. In this work, we aimed to evaluate the training of undergraduate students of Biotechnology and Biology courses in topics related to Quality Management. A survey was carried out on the curricula content of several higher education institutions, available online. From this information, we identified that more than half of the courses do not provide information and training capable of preparing the student to work, even in a primary way, under Quality Management Systems. We emphasize the need for a reformulation in these curricula to guarantee adequate training of its students to the market.
Autores: Marcos Rogozinski, Carlos Roberto Hall Barbosa, Elisabeth Costa Monteiro
Palavras-chave: magnetic foreign body, magnetometer, biomagnetism, convolutional neural networks
Resumo: Ferromagnetic foreign bodies accidentally inserted in patients usually need to be surgically removed. Their location can be estimated by measuring the magnetic field generated by the object and solving the magnetic inverse problem to locate the source based on the magnetic field maps configuration. Considering ferromagnetic straight needles (hypodermic or sewing, for example) and a computer simulation of the magnetic flux density based on BiotSavart’s Law, this paper presents an algorithm based on Convolutional Neural Networks (CNN) to find the depth, the angles of inclination and rotation and the center of the needle inside the human body. The proposed model presents low RMSE values and type A measurement uncertainty for the depth, the inclination angle, the rotation angle, and for the displacement Δ between the midpoint of the distance connecting the magnetic field extreme values and the foreign body center, all of which adequate for use in therapeutic procedures.
Autores: Vinícius Tostes Seixas, Carlos Roberto Hall Barbosa, Elisabeth Costa Monteiro
Palavras-chave: measuring system, non-ferromagnetic foreign body, giant magnetoimpedance, magnetic sensor, foreign body localization, eddy currents
Resumo: Noninvasive magnetic mapping for locating non-ferromagnetic metallic foreign bodies, such as firearm projectiles, has a promising application for guiding accurate surgical removals. The strategy consists of inducing eddy currents in the metallic object by applying an external alternating magnetic field. A secondary magnetic field generated by the induced currents in the foreign body can be detected by a high-sensitivity transducer. Previously proposed systems presented constraints to the measurement capability of the transducer imposed by the primary magnetic field interference on their sensing elements. Overcoming these limitations, this work proposes a new configuration of the system that decouples the excitation and measuring stages, arranging their elements symmetrically to generate a spatial distribution of the field lines in such a way that adequate magnetic flux density levels are produced in the region of the foreign body, with values nearly not-detectable at the sensor location. Thereby, the secondary field generated by the induced eddy currents can be amplified, allowing the detection of smaller fragments located at greater depth distances from the skin. The measuring system concept, the spatial distribution of the primary and secondary magnetic fields, and the new approach’s performance to localize foreign bodies are presented.
Autores: Edilvando Pereira Eufrázio, Fábio Silva de Oliveira, Leonardo de Farias Linhares
Palavras-chave: Implantes mamários; Ensaio de rasgo; Modelagem estatística
Resumo: Os ensaios de resistência ao rasgo, em implantes mamários, são executados de forma a obter parâmetros estatísticos, visto que a normativa base não determina valores para os testes. Objetivo: Verificar se há diferença estatística na força de rasgo entre os diferentes materiais de fabricação e ainda entre fabricantes distintos. Metodologia: As amostras consistem nos corpos de prova de três fabricantes de implantes e três tipos de membranas. Resultados: Fez-se uma avaliação estatística não paramétrica entre o valor mediano da força máxima de rasgo. Conclusão: Há diferenças em relação às resistências ao rasgo entre as diferentes marcas.
Autores: Gabriel Cataldo de Morais, Ruan C Mayworm, Danielle Tallia Giosa, Flávia Noemy Gasparini Kiatake Fontão, José Mauro Granjeiro, Rodrigo P.B. Costa-Felix
Palavras-chave: Implant dentistry, Speed of sound, Polymer, Material homogeneity, Ultrasound.
Resumo: Dentistry implants methods are recursively enhancing the image localisation approach to improve patient point of intercession accuracy. Previous planning of the surgical act is on the cut edge of the technology. Materials that mimic the implant house, i.e., the maxillary bone, have been developed and improved material technology. Standard non-invasive and non-ionising radiation technologies are relevant tools to that approach. Ultrasound imaging techniques play a prominent role in that matter. Nevertheless, recent polymer materials specially developed to help the pre-implant studies had not been evaluated about their homogeneity of ultrasound parameters. Two specially developed polymer materials have their speed of sound analysed in a metrologically based methodology. At 1 MHz, a set of 10 blocks were considered statistically equivalent, unless one specimen. The speed of sound was 1020 m s -1 (expanded uncertainty for p = 0.95 equals 22 m s -1 ) and 1676 m s -1 (U0.95 = 10 m s -1 ). The ultrasound homogeneity is a vital outcome of the reliability of those materials used in dentistry implant pre-clinical studies.
Autores: Vinicius do Nascimento Moraes, Jessyca Gomes da Silva, Alexia Santana Barradas
Palavras-chave: Cabine de segurança biológica, Avaliação Metrológica, NSF/ANSI 49, Contenção Biológica
Resumo: A Cabine de segurança biológica é um equipamento que deve ser projetado para fornecer proteção ao pessoal, ao ambiente e a amostra manipulada. O consistente desempenho das cabines ocorre quando os procedimentos apropriados de garantia da conformidade a requisitos especificados e manutenção são seguidos. Neste trabalho foram discutidos aspectos relacionados à avaliação metrológica das cabines de segurança biológica classe II. Sendo o problema principal a ser apresentado a falta de harmonização em aspectos como: testes realizados para avaliação da conformidade, a terminologia descritiva dos serviços e falta de uma diretriz nacional específica que padronize a avaliação metrológica do item. Foram avaliados equipamentos nacionais e importados, de sete fabricantes, em dez diferentes usuários, localizados em quatro estados do Brasil. Dos equipamentos avaliados, 45% apresentaram alguma falha na fabricação que comprometem o operador eou a amostra. E 50% apresentaram algum parâmetro em não conformidade com os parâmetros de desempenho especificados pela norma SFA/ANSI 49.
Autores: Everande Gobira de Oliveira, Rodrigo P.B. Costa-Félix
Autores: Erick da Silva Ferreira Pinto, Wu Bing Shiuan, Ericles William de Jesus Santos, Tiago Costa Dourado, Rodrigo Pereira Barretto da Costa-Félix
Autores: Mariana Sampaio Lemos Costa, Rodrigo Moreira Brito, Hércules da Silva Carvalho, Ricardo de Araujo Kalid, Marcio André Fernandes Martins
Autores: Laís dos Santos Gonçalves, Khrissy Aracélly Reis Medeiros, Carlos Roberto Hall Barbosa
Autores: José Gilberto Fernandes Junior, Rodrigo P.B. Costa-Félix
Autores: Frederico de Lima, Rodrigo P.B. Costa-Felix, Rodrigo Ozanan Oliveira
Autores: Márcio A A Santana, Eugênio S Almeida, Patrícia L O Guimarães, Javier Skabar, Chiara Musacchio, Andrea Merlone
Autores: Maria Cristina Ferreira Pessoa, José Mauro Granjeiro
Autores: Maria Beatriz Calderan Rodrigues Bonassi, Flávia Lordello Piedade
Autores: Bruna Fachin, Carina Sand, Vitória Lunardi Xavier, Alexandre Bacelar, Sérgio Von Poser Maciel, Luciano Ribeiro, Carlos Alberto Grunewald Nichele, Luiz Fernando Kern, Marcelo Barbalho Pereira
Autores: Claudia C Baldez, Paulo R G Couto, Lessandra L N Cauduro, Jailton C Damasceno, Tania R S A Rodrigues