Antti Vehkaoja, Jukka Lekkala
A very simple PC based system for simulation of bioelectrical signals is presented. In addition to a regular PC with an audio card and the constructed software only few passive components are needed to accurately mimic the waveforms of the original recorded bioelectrical signals stored in the PC's hard drive. Alternatively, the simulated signals that are generated from the original recordings by Matlab can be played back with an mp3-player. Due to the nature of our method and the bandwidth limitations of PCs' audio card, the system is not suitable for simulation of high frequency signals but...
XIX IMEKO World Congress
· TC13
· 2009
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Josep M. Torrents, Pablo Juan-García, Oriol Patau, Antonio Aguado
Conventional concrete structures are nowadays being substituted by steel fibre reinforced concrete (SFRC) in some structural applications. Then, fibre dosage and distribution is a keyword for ensuring quality control of structures. The present work analyses the possibility of an Open Ended Coaxial Probe as an element for ensuring the quality of a concrete slices.
XIX IMEKO World Congress
· TC20
· 2009
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Janez Setina, Bojan Erjavec
A new method for determination of volume ratios and also the absolute value of volumes of vacuum vessels is presented. Method is based on a measurement of rate of pressure rise in a vacuum chamber at constant flow of inert gas. An example of measurement of a volume of a chamber with a nominal volume of 7 L is presented. For pressure measurements we have used a spinning rotor gauge (SRG) and He permeation leak was used as a gas source.
XIX IMEKO World Congress
· TC16
· 2009
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Alan G Steele, A. Peruzzi, J. E. Decker, R. J. Douglas
The full suite of tools for the evaluation of statistical consistency of metrological data is applied to the data set compiled from two recent international comparisons: CCT-K7 and EURAMET.T-K7. This paper illustrates how insights into lab measurement characteristics such as repeatability, reproducibility, secular uncertainties and laboratory equivalence statements can be obtained in a statistically-rigorous manner.
XIX IMEKO World Congress
· TC21
· 2009
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Salvatore Lorefice, Elena Amico di Meane, Michela Sega
Density measurements are frequently associated to specific requirements in order to evaluate the quality of a process or to determine mass and/or volume of the material. Certified reference liquids can be used to assure metrological traceability of density measurements to the International System of Units (SI) with uncertainty lower than 0.005 %. This paper presents the new approach of the Italian Istituto Nazionale di Ricerca Metrologica (INRIM) to set density standards. The procedure involved accurate density determinations of some liquid samples, to be used as references, on which in...
XIX IMEKO World Congress
· TC8
· 2009
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Ikuo Ihara, Manabu Takahashi
A new ultrasonic method for monitoring the temperature distribution inside a material being heated or cooled is presented. The principle of the method is based on the temperature dependence of the velocity of ultrasonic wave propagating through a material. An effective inverse analysis coupled with a finite difference calculation is used to determine the one-dimensional temperature distribution inside a thick plate. To verify the practical feasibility of the ultrasonic method, experiments have been demonstrated. A single side of a steel plate of 30 mm thickness is heated by contacting with a...
XIX IMEKO World Congress
· TC12
· 2009
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Alessandro Germak, Claudio Origlia
The influence of Rockwell and Vickers diamond indenters geometry in hardness measurements justifies the strict specifications and tolerances in the relative standards. Many methods, and consequently dedicated instruments, have been developed to investigate the geometrical parameters in order to calibrate the diamond indenters. Most of them, using contact or contactless methods, can only investigate some profiles of the indenters; from these partial measurements the whole geometry is derived. Few other instruments can investigate the whole shape but, since they are custom-developed, costs and...
XIX IMEKO World Congress
· TC5
· 2009
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Giampaolo E. D'Errico
A Bayesian treatment of conjectured outlying observations is developed, using the computational device of inverse probability. The device's performance is discussed in term of posterior probability of missed or false detections. The key role of prior probability is shown through a numerical example.
XIX IMEKO World Congress
· TC21
· 2009
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Francesco Adamo, Filippo Attivissimo, A. Di Nisio, Anna M. L. Lanzolla, Maurizio Spadavecchia
The paper describes the first results of a simulation and characterization tool useful to evaluate electrical performances of photovoltaic (PV) panels. A simple one-diode model is used in order to estimate the electrical parameters of a PV panel and predict how the I-V characteristic changes with environmental parameters such as temperature and irradiance. This work is part of a wider project whose final purpose is to model a whole PV plant in order to control its performances in various environmental conditions and maximize the energy production. The continuous monitoring of a plant and the...
XIX IMEKO World Congress
· TC4
· 2009
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Yasuhiro Mizutani, Yoshiyuki Uehane, Tomohito Kuwagait, Yukitoshi Otani, Norihiro Umeda
Recently, the surface profiles of subwavelength structure have been reduced in size in order to develop microfabrication techniques. In particular, feature sizes of a few tens of nanometres are common in the semiconductor industry. This study uses a Mueller matrix polarimeter, which is based on a scatterometry technique, to evaluate the surface profiles of subwavelength structure. In this technique, a profile of the structure is determined from the Mueller matrix which expresses all the polarization properties of the sample by experimental measurements and calculated values. Furthermore, the...
XIX IMEKO World Congress
· TC2
· 2009
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