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Mare Srbinovska, Vesna Andova, Aleksandra Krkoleva Mateska, Maja Celeska Krstevska, Marija Cundeva-Blajer
ENVIRONMENTAL WIRELESS SENSOR MONITORING AND ESTIMATION OF GREEN INFRASTRUCTURE LOCATION IMPACT ON PARTICULATE MATTER REDUCTION FOR IMPROVED AIR QUALITY

Low quality of the air is becoming a major concern in urban areas. High values of particulate matter (PM) concentrations and various pollutants may be very dangerous for the human health and the global environment. The challenge to overcome the problem with the air quality includes efforts to improve healthy air not only by reducing emissions, but also by modifying the urban morphology to reduce the exposure of the population to air pollution. The aim of this paper is to analyze the influence of the green zones on air quality mitigation through measurements, and to identify the correlation with the meteorological factors.

A. Röttger, S. Röttger, D. Rábago, L. Quindós, K. Woloszczuk, M. Norenberg, I. Radulescu, A. Luca
BEYOND THE STATE OF ART: NEW METROLOGY INFRASTRUCTURE FOR RADON MEASUREMENTS AT THE ENVIRONMENTAL LEVEL

Radon gas is the largest source of public exposure to naturally occurring radioactivity. Radon activity concentration maps, based on atmospheric measurements, as well as radon flux maps can help Member States to comply with the EU Council Directive 2013/59/Euratom and, particularly, with the identification of Radon Priority Areas. Radon can also be used, as a tracer, to improve Atmospheric Transport Models and to indirectly estimate greenhouse gas (GHG) fluxes. This is important for supporting successful GHG mitigation strategies. One approach to estimate GHG fluxes on local to regional scale is the socalled Radon Tracer Method (RTM), which is based on the night-time correlation between atmospheric concentrations of radon and GHG measured at a given station together with information on the radon flux data within the station footprint. Thus, atmospheric monitoring networks are interested or are already measuring atmospheric radon activity concentrations using different techniques but a metrological chain to ensure the traceability of all these measurements was missing. Since 2020 a large consortium engaged in the project traceRadon [1] to develop the missing traceability chains to improve the respective sensor networks http://traceradon-empir.eu/ . This paper presents results in the areas: Novel 226Ra standard sources with continuous controlled 222Rn emanation rate, radon chambers aimed to create a reference radon atmosphere and a reference field for radon flux monitoring. The achieved results are making new calibration services far beyond the state of art possible.

D. Turinski, I. Svalina, R. Lujić, T. Šarić, G. Šimunović, S. Havrlišan
PROBLEMS OF SOFTWARE PROCESSING OF DIGITAL PHOTOGRAPHY INTENDED FOR DETERMINING THE DIMENSIONAL ACCURACY OF A PRODUCT

Some of the problems that arise during the processing of the acquired photo are analyzed in this paper. The most commonly used software tools in image processing require binary photography, and its conversion into the binary form is required first. Conversion problems, and their proper solution, are key steps for further machine determination of dimensional accuracy. Removing smudges on binary photos and rotating displays for photo overlap methods are the problems that are solved in the work, in order to successfully prepare the photo with software for further determination of the dimensional accuracy of the product. The knowledge gained in this paper will help scientists, and facilitate their.

V. Sedlák, D. Pražák, J. Tesař, D. Rosu, G. Geršak, M. Ferreira, M. Nawotka, A. Bosnjakovic, E. Jugo, P. Hetherington, A. Duffy, P. Pavlásek
EVALUATION OF SPHYGMOMANOMETERS USING AN ADVANCED OSCILLOMETRIC SIGNAL GENERATOR

Reliable and accurate blood pressure measurements using sphygmomanometers are indispensable in the diagnostic and treatment of hypertension. Unfortunately, testing of performance and accuracy of automated oscillometric sphygmomanometers is complicated, lengthy and expensive. Fact that the oscillometric sphygmomanometers are majority of the blood pressure measuring devices on today’s market makes the problem more pressing. EMPIR project adOSSIG built a physiologybased advanced blood pressure simulator with a goal of improving blood pressure measurements. This paper describes results of testing of sphygmomanometers using this newly developed simulator.

A. Carbone, F. Tartarelli, M. Lazzaroni, S. Latorre
QUALITY ASSURANCE AND TESTING OF THE ATLAS LIQUID ARGON CALORIMETER POWER DISTRIBUTION BOARDS

During the second Large Hadron Collider Long Shutdown, the Liquid Argon calorimeter of the ATLAS experiment at CERN has been upgraded with a new trigger readout electronics which provides digital information with higher granularity to the ATLAS trigger system. In particular the new LAr Trigger Digitizer Boards will process and digitize the "Super Cells" (group of readout calorimeters cells) and send the processed data to the back-end electronics. The Power Distribution Board is a mezzanine board that provides the power distribution to the LTDB.

Kenan Varda, Almira Softić, Nermina Zaimović-Uzunović, Ernad Bešlagić
COMPARISON OF DIMENSIONS, SHAPES AND POSITIONS CONTROL USING CMM AND 3D SCANNER

In this paper, measurements on stainless steel AISI 304 workpiece using Coordinate measuring machine Carl Zeiss Contura G2 and 3D scanner RangeVision PRO are compared and analyzed. Dimensional control is conducted by measuring 11 faces and 9 cylinders. Length, diameter, cylindricity, flatness and parallelism are controlled for features of interest. Using Calypso software on CMM and GOM Inspect software for 3D scanned model are used for creating virtual measurement strategies and dimensional and GD&T control. Deviations of measuring results using both measuring systems are shown and conclusions and recommendations for dimensional control are listed in tables.

G. P. Ripper, R. S. Dias, G. B. Micheli, C. D. Ferreira
AN ANALYSIS OF THE PARTICIPATION OF INMETRO IN INTERLABORATORY COMPARISONS IN VIBRATION MEASUREMENTS

This paper provides an overview of the participation of INMETRO on vibration interlaboratory comparisons along the last years and analyses the benefits of having an active participation in such activities.

A. Savarin, A. Chijioke
MEASUREMENT OF DYNAMIC ROCKING IN SINUSOIDAL CALIBRATION WITH AN ELECTRODYNAMIC SHAKER

Rocking motion is often a significant source of uncertainty in sinusoidal calibrations of accelerometers and force transducers. We describe real-time measurements of rocking during sinusoidal excitation, performed at NIST. The measurement is contactless and can be performed simultaneously with the motion. We report rocking measurements for excitation frequencies up to 2 kHz. The results obtained have an absolute uncertainty (k = 2) in the range of 0.02 µrad to 3.3 µrad and allow error due to rocking motion to be largely corrected in axial acceleration measurement.

Anderson K. Maina, Christiaan S. Veldman
MINIMISING THE EFFECTS OF SPURIOUS RESONANCES IN SECONDARY VIBRATION CALIBRATION

This paper explores the use of fitted sensitivity values in order to minimize the effects of spurious resonances in the frequency response of reference accelerometers used in secondary vibration calibration.

Andreas Havreland
ELECTRICAL IMPEDANCE BASED CALIBRATION OF ACCELEROMETERS

This contribution proposes a methodology to predict the transfer function of an accelerometer solely based on an electrical impedance measurement. Such impedance measurement can be conducted in-situ and has certain advantages for some types of accelerometers and under certain measuring conditions. A proof-of-concept study has been conducted where the methodology is used to estimate the sensitivity at 160 Hz, the proposed method underestimates the sensitivity by 9% compared to a conventional vibration experiment.

Page 3 of 888 Results 21 - 30 of 8878