IMEKO Event Proceedings Search

Page 905 of 939 Results 9041 - 9050 of 9382

Ivan Skubic, Nineta Majcen, Paul De Bièvre, Philip Taylor
METROLOGICAL INFRASTRUCTURE FOR CHEMICAL MEASUREMENTS RELATED TO QUALITY OF LIFE IN SLOVENIA

An approach to set up an appropriate and optimal national infrastructure for measurements related to quality of life in Slovenia is described. It is based on an analysis of the needs of the global society, of the national needs and priorities and on the national capabilities. The implementation of the conclusions into practice has started. As in general measurements in chemistry and microbiology were not yet systematically tackled, the approach given here might serve as a model to enable other countries to establish a suitable national metrology infrastructure, which would adequately support the national needs in chemical and microbiological measurements.

Wilfried Schulz
ROLE OF WELMEC IN REGIONAL COOPERATION

WELMEC is the European Co-operation in Legal Metrology. The principal aim of WELMEC is to establish a harmonised and consistent approach to European legal metrology. WELMEC is concerned with the establishment, maintenance and improvement of channels of communication between its members and associate members and aims to develop mutual confidence through participation in common activities.

Salvador Echeverría-Villagómez
EVOLUTIONARY MECHANISMS FOR STRUCTURED GROWTH OF METROLOGICAL SYSTEMS IN DEVELOPING ECONOMIES

The paper presents a robust methodology and an integral strategy to develop optimal metrological infrastructures in unstable economic environments and imperfect markets, as those presented in developing economies. This methodology can be applied at two levels:
I.- Within an organization, e.g. an industry or company, and
II.- Within an economy, e.g. an economy, country or region.
The methodology is the MESURA® Program which is applied by metrology consultants to particular organizations and the corresponding strategy is the creation of a laboratory network based on a franchise scheme, the MESURA® Network.
The paper presents the objectives, principles and mechanisms of operation of MESURA®. Emphasis is given to the evolutionary principles of the strategy, which allow the implementation of metrological systems and infrastructures with the following characteristics:
• Adapted to their environment
• Viable in technical aspects
• Viable in economical aspects
• Fit for structured growth
• Fit for reproduction
The MESURA® Program and the Network have been developed, implemented and proved in Mexico and have found conceptual acceptance and application also in other countries. The final section includes an evaluation of its development and recommendations for its potential application in other developing economies.

John Ndanusa Akanya
ACTIVITIES OF STANDARDS ORGANISATION OF NIGERIA

Standards Organisation of Nigeria (SON) was established by Decree No. 56 of 1971, and with three amendments in 1976, 1984 and 1990, the body corporate, has the sole responsibility for National Policy on Metrology, Standards, Testing and Quality Control (MSTQ). SON is the custodian of all product, process and metrology Standards in Nigeria.

Austin S. Khulumula
DEVELOPMENT OF METROLOGY INFRASTRUCTURE IN AFRICA

The development of metrology infrastructure in African Member States has been the mandate given to ARSO by the African Union (AU) previously the Organization of African Unity (OAU) in its Treaty. ARSO fulfils this role through coordination mechanism that harmonizes the sub-regional metrology programmes, arrangements of training of personnel with the support of cooperating partners and African Governments. ARSO ensures, through its programmes the maximum sharing of facilities among African Member States in order to enhance the measurement capabilities of countries in the African economies for better competitiveness of goods and services.

Eberhard Seiler
FROM THE INTERNATIONAL SYSTEM OF UNITS TO A GLOBAL METROLOGY SYSTEM

The paper describes recent developments towards a global metrology system. The driving forces behind this development are globalization and the liberalization of trade. The World Trade Organization, WTO, with more than 140 member states sets the rules for international trade. Other international organizations must take into account these rules and especially, the Technical Barriers to Trade Agreement. The organs of the Metre Convention developed a system to ensure worldwide traceability and mutual recognition of measurements and calibrations. Details of the system and measures to establish confidence in the competence of National Metrology Institutes are described. Furthermore, laboratory accreditation procedures and the role of regional and international accreditation organizations with regard to ensure confidence in competence are explained. The International Organization of Legal Metrology, OIML, contributes to the global metrology system by recommendations for measuring instruments and a certificate system indicating that a given instrument pattern complies with the requirements of the relevant OIML recommendation. Suggestions for possible IMEKO contributions are given.

Carlos Hall Barbosa, Elisabeth Costa Monteiro, Flávia Pompéia
LOCALIZATION OF MAGNETIC FOREIGN BODIES IN HUMANS USING MAGNETIC FIELD SENSORS

A technique had been previously developed, based on magnetic field measurements using a SQUID sensor, to localise in three dimensions steel needles lost in the human body. In all six cases that were treated until now, the technique allowed easy surgical localisation of the needles with high accuracy, decreasing by a large factor the surgery time and also reducing the generally high odds of failure. The method is accurate, non-invasive and innocuous, with clear clinical importance. In this paper we present preliminary measurements performed with a fluxgate magnetometer instead of a SQUID.

F. Tatar, J.R. Mollinger, P. Turmezei, A. Bossche
CROSS-CORRELATION METHOD APPLIED TO AN ULTRASOUND SYSTEM FOR MEASURING POSITION AND ORIENTATION OF LAPAROSCOPIC SURGERY TOOLS

A new ultrasound wireless positioning system is developed that gives the surgeon the exact location and orientation of the instruments in the patient. The measuring system employ ultrasound markers placed on the instruments, outside of the human body. Knowing the dimensions of the usually rigid instruments it is possible to calculate their position and orientation inside the patient from the markers’ positions. Using the cross-correlation method we obtained a resolution of 0.7 mm in determining the marker positions.
To eliminate wiring to the tools a wireless radio wave (RF) system is used to trigger the ultrasound sensors.

Zdenek Malec, Petr Beneš
AN AUTOMATIC SYSTEM FOR MEASURING OF PROPERTIES OF PRECISION GEARBOXES

This paper deals in its first part especial requirements which must be fulfilled by gearboxes being used in applications demanding very high accuracy: uniformity of motion, exactly described hysteresis loop, limited vibrations and good efficiency. In the second part the basic conception of a realised experimental stand is described. The stand allows to perform all measurements, data acquisition and evaluation mentioned later. The control of all components of the measuring stand and the necessary data processing and final presentation of results is performed by a PC.

R Gozdur, M. Jerzy Korczynski
GLASS QUALITY TESTER

The techniques for digital image acquisition and digital image processing used to identify defects in transparent elements are described in the paper. The block diagram of the test set-up, algorithm of the software developed for identifying geometrical parameters of defects are presented here. The set-up, presented in the paper is proposed for glass quality production control at final and intermediate production line of double glassed windows. The other applications are foreseen. One of the very important feature is calibration of the image with the use of reference glasses, light correction and adjusting parameters of the set-up according to requirements. Calibration is achieved with the of use patterns prepared ahead of time and also with a use of the same set-up. Glass can be categorised depending on number of defects and percentage of defected area or can be disqualified at production line if any permanent defect is found in observed element.

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