Jae-Hyuk Choi, Min-Seok Kim, Yon-Kyu Park, Yun Won Kim, Dae-Im Kang
We report the status and progress of Korea Research Institute of Standards and Science (KRISS) in pico-newton standard force realization. To produce and measure discrete magnetic force on a superconducting ring in proportion to the number of flux-quantum, an instrument and facilities are being developed to provide multi-conditions such as low temperature, high field-gradient, high vacuum, vibration isolation, and so on. Design and construction of sub-systems are presented as well as expected and tested specification for each sub-system.
XIX IMEKO World Congress
· TC3
· 2009
· Download
Jaidilson Silva, Antonio Marcus Lima, Franz Neff, José Sérgio da Rocha Neto
The easy detection of fouling in duct systems is a persistent problem and remains a relevant demand for the chemical, oil, food and pharmaceutical industries. This work presents preliminary research results of vibrational hammer excitation for easy to use external non-invasive, non-destructive multi-layer fouling detection in pipelines and other large scale duct systems. Data were taken from the vibration amplitude and frequency variation in presence of an inner pipe fouling layer using acoustic accelerometer and microphone detection.
XIX IMEKO World Congress
· TC22
· 2009
· Download
Renato Teixeira, Hamilton Vieira, Rodrigo Silva
The Inmetro Thermometry Laboratory uses fixed-points cells defined in the International Temperature Scale of 1990 (ITS-90) to calibrate thermocouples and standard platinum resistance thermometers. In order to meet this, the laboratory counts on reference fixed-point cells from the Argon triple point (-189,3442 ºC) to the Copper fixed-point (1084,62 °C). In a quest to improve its best measurement capability and to disseminate this, the laboratory has been investing in the manufacture of its own primary standards. This process was started with water triple point cells, mercury triple point...
XIX IMEKO World Congress
· TC12
· 2009
· Download
Noara Foiatto, Christine Tessele Nodari, João Miguel Lac Roehe, Marcus Vinicius Viegas Pinto
Technical irregularities found in electrical power meters due to tampering, which are classified as fraud, are responsible for the most part of the energy loss experienced in the sector of electrical power distribution. The cost of energy theft is shared with all consumers in the form of non-technical losses. This work suits that context, by means of combating fraud in electric power meters in order to reduce losses due to the strengthening of effective punishment of cheaters. For that is proposed a systematization model of the process for verification of irregularities in electric power...
XIX IMEKO World Congress
· TC10
· 2009
· Download
Wojtek Bock, Tinko Eftimov, Predrag Mikulic, Jiahua Chen
We propose a simple all-fiber structure based on intermodal interference between a core and a cladding mode of an endlessly single-mode photonic crystal fiber section sandwiched between a lead-in and lead-out SMF-28 fiber. The sensitivities to strain, pressure and temperature are measured. The interferometer is compared to an interferometer based on LP 01 -LP 02 SMF-28 fiber and to a PCF-based tapered LPG.
XIX IMEKO World Congress
· TC2
· 2009
· Download
Ana Madeira, Florbela A. Dias, Eduarda Filipe
Air pollution exists where there are quantitative variations in the air composition or by the introducing of new pollutants. With the automobiles and industrialization increase there has been a need to control gas emissions before loading them into the environment. To this end, environmental and pollutants gas analyzers are used and it is necessary calibration by competent entities. The main proposal of this communication is to demonstrate the importance of the calibration operation of these instruments as well as the calculation of associated uncertainties.
XIX IMEKO World Congress
· TC19
· 2009
· Download
Jorge Santolaria, Juan José Aguilar, Agustín Brau, Francisco Javier Brosed
This paper presents a comparison of different techniques to capture nominal data for its use in later verification and kinematic parameter identification procedures for articulated arm coordinate measuring machines (AACMM). By using four different probing systems (passive spherical probe, active spherical probe, self-centering passive probe and self- centering active probe) the accuracy and repeatability of captured points has been evaluated. The nominal points are materialized by a ball-bar gauge distributed in several positions of the measurement volume. By comparing these systems it is...
XIX IMEKO World Congress
· TC14
· 2009
· Download
Chiara Boveri, Francesca Durbiano, Danilo Serazio
The present paper focuses on the development of a flow-through cell and a closed circuit that permit to carry out measurements of low electrolytic conductivity of aqueous solutions under flowing condition. The traceability path has been set as follows: samples with conductivity between 200 mS cm -1 and 50 mS cm -1 have been employed for the calibration of the geometric constant of the new cell, by comparison with the primary cell of Istituto Nazionale di Ricerca Metrologica (I.N.Ri.M.). Then the flow-through cell has been used to measure values with decreasing conductivities down to 1 mS cm...
XIX IMEKO World Congress
· TC24
· 2009
· Download
Alistair B. Forbes
This paper considers the analysis of observational data associated with the fundamental constants, in particular looking at issues of consistency and sensitivity.
XIX IMEKO World Congress
· TC21
· 2009
· Download
Eliane Cristina Pires do Rego, Annibal Duarte Pereira Netto
Epidemiological studies have shown that the exposure to polycyclic aromatic hydrocarbons (PAHs) increases the risk of several kinds of human cancers. In this way the use of biomarkers to evaluate PAH exposure is of interest. Urinary 1-hydroxypyrene (1-OHPy) that is the major metabolite of pyrene has been considered as a suitable biomarker of exposure to PAHs as a group, but there are few data about urinary 1-OHPy in Brazil. The objectives of this study were the implementation and validation of a method for the evaluation of urinary 1-OHPy and its application to individuals submitted to...
XIX IMEKO World Congress
· TC24
· 2009
· Download