Cachaça is the Brazilian most popular spirit and the quality of analytical results is essential for protection of consumers and to expand the international acceptance of the product. The first round of the proficiency-testing scheme (interlaboratory study), Brazilian cachaça, was carried out between November 2004 and March 2005. The blended sample was prepared for this round containing several components, including copper, methanol and ethyl carbamate. The aim of this paper is to evaluate the laboratory performance on the determination of the copper concentration in Brazilian cachaça. Eleven...
XVIII IMEKO World Congress · TC7 · 2006 · Download
Measurements are the key to rational decision making. Measurement information generates value, when it is applied in the decision making. An investment cost and maintenance costs are associated with each component of the measurement system. Clearly, there is – under a given set of scenarios – a measurement setup that is optimal in expected (discounted) utility. Contrary to process design, design of measurement and information systems has not been formulated as such an optimization problem, but rather been tackled intuitively. In this presentation we propose a framework for analyzing such an...
XVIII IMEKO World Congress · TC7 · 2006 · Download
Abstract: This work reviews the economics of standards, conformity assessment procedures and the trade of Brazilian industrial products. It also evaluates the associated economic impact resulted from their product certification based on international best practices. Four leading products were chosen: steel, bus coachwork, automotive tires and cement. The production time series of these products (made available by governmental agencies) were fitted by means of the multiple linear regression method. The method was successfully applied at a 5% level of significance (a probability value...
XVIII IMEKO World Congress · TC7 · 2006 · Download
We present FP6. Integrated Project SENSATION and works done by our Group on application of nonlinear dynamics for analysis of biosignals measured by new nanosensors for vigilance monitoring and for biomedical applications.
XVIII IMEKO World Congress · TC7 · 2006 · Download
José Eduardo Manzoli, Paulo Roberto Rela, Juliana Silva Félix, Magali Monteiro
Migration of components from plastic packaging into foodstuffs or into medicines is a very important issue, concerning public health. Using experimental techniques, like gas chromatography-mass spectrometry, these essays measure total migration and specific migration of components from plastic packaging. This work presents an explanation and applications of a numerical technique tool for this measurement, allowing the comprehension of the diffusion process and the estimate of component migration in difficult or impractical measurements. As an application example, the non-uniform influence of...
XVIII IMEKO World Congress · TC7 · 2006 · Download
Magnetic field distribution measurement and imaging of thin layers using magnetic resonance techniques on biological samples have been performed. The resultant image represents the magnetic susceptibility distribution in the sample. An NMR imaging method susceptible to the homogeneity of magnetic field Gradient Echo was used. Since the investigated physical or biological samples did not generate any NMR signal, a homogeneous phantom (reference medium) was used - a container filled with water - as a medium. An image acquired by this method is actually a projection of the sample properties...
XVIII IMEKO World Congress · TC7 · 2006 · Download
Due to the fast advancement of manufacturing technologies for micro- and nanostructured components the need for sophisticated inspection methods increases. The paper on hand discusses the prerequisites for automatic execution of inspection plans. Main goal is to enable automated dimensional measurements of micro- and nanostructured components instead of executing functional tests. Besides reducing manufacturing cost this approach enables the setup of a closed quality loop which allows a higher level of efficiency. It provides a constant feedback to the manufacturing processes and to the...
XVIII IMEKO World Congress · TC7 · 2006 · Download
Klaus-Dieter Sommer, Albert Weckenmann, Bernd R. L. Siebert, Stefan Heidenblut, Karina Weißensee
The evaluation of measurement uncertainty is based on both, the knowledge about the measuring process and the quantities which influence the measurement result. The knowledge about the measuring process is represented by the model equation which expresses the interrelation between the measurand and the input quantities. Therefore, the modeling of the measurement is a key element of modern uncertainty evaluation. A practical modeling concept has been developed that is based on the idea of the measuring chain. It gets on with only a few generic model structures. From this concept, a practical...
XVIII IMEKO World Congress · TC7 · 2006 · Download
The paper is based on a long-term programme of research on mathematical modelling and computer aided design of instruments and instrument elements in the Measurement and Instrumentation Centre of City University London. It considers the principal generic problems of computer aided design of instrument systems and aspects of the research agenda that arises from them. It describes recent advances in the computer aided design of sensors and actuators.
XVIII IMEKO World Congress · TC7 · 2006 · Download
Fuzzy nominal scales were introduced in order to propose a formalism to the representation of empirical quantities by fuzzy subsets of words. This paper presents the results of studies on distances associated to this formalism and proposes a new distance operator.
XVIII IMEKO World Congress · TC7 · 2006 · Download