Maurizio Bovi, Maria Pia Toni, Isabelle Aubineau-Lanièce, Jean-Marc Bordy, João Cardoso, Bruno Chauvenet, Frantisek Gabris, Jan-Erik Grindborg, Antonio Stefano Guerra, Antti Kosunen, Carlos Oliveira, Maria Pimpinella, Th
In the current brachytherapy practice, the procedures to determine the absorbed dose imparted to the patient are affected by an uncertainty higher than in radiotherapy with external beams. That could reduce the success of brachytherapy treatments. Most of the uncertainty is due to a lacking metrology: no absorbed-dose primary standards are so far available to assure direct traceability in dosimetry of brachytherapy sources. This paper outlines the project "Increasing cancer treatment efficacy using 3D brachytherapy", co-funded in the framework of the project iMERA-Plus according to the Grant...
XIX IMEKO World Congress
· TC13
· 2009
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Vadim Geurkov, Valeri Kirischian, Lev Kirischian
When testing an analog-to-digital converter (ADC) by automatic test equipment (ATE), the latter is capable of performing extensive processing of output responses of the ADC. This allows detection of virtually any fault. However, the cost of ATE is quite high. As well, the external bandwidth of ATE is normally lower than the internal bandwidth of the ADC being tested, which makes it difficult to accomplish at-speed testing. It is important, therefore, to embed test hardware into ADC itself. The methods employed at ATE are complex and inconvenient for built-in realization. More advantageous...
XIX IMEKO World Congress
· TC4
· 2009
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Jorge Trota Filho, Renato Reis Machado, Sérgio Pinheiro de Oliveira, Cláudio Afonso Koch, Islei Domingues da Silva
This work aims to validate the creation of a relationship between the direct and indirect calibrations of Rockwell C hardness diamond cone indenters. The resulting modelling allows the prediction of the indenters behaviour based on direct calibration. The uncertainty of indenters was obtained from the graph of uncertainty related to the Primary Hardness Standard Machine as a function of the uncertainty related to the Primary System for Calibration of Indenters. For mounting the experimental set-up it was necessary to use a lot of indenters, and their characteristics helped to model the...
XIX IMEKO World Congress
· TC5
· 2009
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Jay H. Hendricks, Douglas A. Olson
The National Institute of Standards and Technology (NIST) Low Pressure Manometry Project maintains and operates primary standard ultrasonic interferometer manometers (UIMs) over the pressure range of 1 mPa to 360 kPa. Over the past decade a new type of customer gauge, the non-rotating force-balanced piston gauge or FPG (model 8601, DH Instruments, a Fluke Company has been introduced to the standards community that covers the range of ˜1 Pa of 15 000 Pa and is capable of both absolute and differential measurement modes. Since 2002, NIST customers have requested that four different FPG units...
XIX IMEKO World Congress
· TC16
· 2009
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Jorge Trota Filho, Sérgio Pinheiro de Oliveira, Islei Domingues da Silva, Renato Reis Machado, Cláudio Afonso Koch
This paper shows the actual status of an on-going metrological research that aims an upgrade of the current Rockwell C hardness scale´s best measurement capability (BMC), e.g. 0.3 HRC, referred to the Primary Hardness Standard Machine installed at the Brazilian NMI INMETRO. This value complies with the ISO hardness standards and the GUM uncertainty guide as well as the main eight uncertainty sources and respective sensitivity coefficients for the direct calibration method, detailed in the EURAMET hardness guide. This work shows that an increasing knowledge of the actual calculated...
XIX IMEKO World Congress
· TC5
· 2009
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Inseok Yang, Yong-Gyoo Kim, Chang Ho Song, Kee Hoon Kang, Kee Sool Gam
We review the low temperature calibration facilities at the Korea Research Institute of Standards and Science. For the calibration of capsule-type standard resistance thermometers, open and sealed cells of cryogenic fixed points and their realization system were manufactured and used. A sealed cell of the triple point of Argon for long-stem standard platinum resistance thermometers was also manufactured. For calibration by comparison, a controllable comparison cryostat and a nitrogen boiling point temperature block were made. We also review our traceability scheme and supporting...
XIX IMEKO World Congress
· TC12
· 2009
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Augusto P. Cunha, Ronaldo N. Azeredo
This paper will present metrology's role on air pollution control in Brazil, the benefits for society and how Inmetro's Legal Metrology Directorate (Dimel, in its Portuguese acronym) is developing this work. Automotive vehicles are very significant air pollution source in Brazil. To change this situation, two years later the Federal Government established the Automotive Vehicles Air Pollution Control Program (Proconve, in its Portuguese acronym), providing to the car manufacturers a gradual schedule to the implementation of cleaner automotive technologies on new vehicles. Today the exhaust...
XIX IMEKO World Congress
· TC19
· 2009
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Monique K. K. Figueiredo, Rodrigo P. B. Costa-Felix, André V. Alvarenga, Luiz E. Maggi, Marcio F. Portilho, Marcio N. Souza, Gilberto A. Romeiro
These papers describe the first set of experiment conducted to validate a measurement system for physical-chemistry analysis of fluids using ultrasound as principle. Frequencies of 2.25, 3.00, and 3.50 MHz were used, with the emission-reception technique with a pair of transducers. Experimental results showed excellent agreement with the theory for attenuation of glycerol at 99.5% of concentration. The system is able to be used in other liquids, being biofuels particularly of interest for this project.
XIX IMEKO World Congress
· TC24
· 2009
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Yoshihiro Fujioka, Kouta Miyake, Jianxin Sun, Toshiro Ono
This research deals with a weighing system used under the conditions in which various movements exist. These various movements are heaving motion, rolling motion, pitching motion, etc. In this paper, these various movements are collectively called as "vibration-like movements". The term of "vibration-like moving conditions" means the conditions in which vibration-like movements exist. In a previous paper, the weighing system which has 3 dummy loadcells is discussed. "Dummy loadcell" is the loadcell which observes the vibration-like movements. We manufactured the weighing system and made...
XIX IMEKO World Congress
· TC3
· 2009
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Cleonilson Protásio de Souza, Tiago Pontes Pereira, Raimundo C. S. Freire
The increasing development on mobile communication allows the design of new applications in different areas. Telemedicine is one of these areas and studies and researches on it are of extremely importance to the society. An important application in telemedicine is the use of electrocardiogram (ECG) to transmit ECG test remotely in a compact or portable way. However, ECG transmission technology available today is still expensive and is based on use of modems and, recently, PDAs. On this context, a portable ECG device based on mobile phone is welcome. A basic mobile service is the Short...
XIX IMEKO World Congress
· TC13
· 2009
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