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A Measurement Approach for Characterizing Temperature-Related Emissivity Variability in High-Emissivity Materials.
Sensors (Basel)
January 2025
Department of Industrial Engineering and Mathematical Sciences, Università Politecnica delle Marche, 60131 Ancona, Italy.
The effective knowledge of emissivity is pivotal to obtain reliable temperature measurements through non-contact techniques like pyrometry and thermal imaging. This is fundamental in high-temperature applications since material emissivity strongly depends on temperature conditions. Given the recent attention in high-temperature applications, especially for replacing fossil-fuel-dependent heating with greener solutions in energy-intensive processes, renewed interest in characterizing materials radiant properties rose.
View Article and Find Full Text PDFDesign and Uncertainty Evaluation of a Calibration Setup for Turbine Blades Vibration Measurement.
Sensors (Basel)
December 2024
Department of Industrial Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy.
Turbomachinery engines face significant failure risks due to the combination of thermal loads and high-amplitude vibrations in turbine and compressor blades. Accurate stress distribution measurements are critical for enhancing the performance and safety of these systems. Blade tip timing (BTT) has emerged as an advanced alternative to traditional measurement methods, capturing blade dynamics by detecting deviations in blade tip arrival times through sensors mounted on the stator casing.
View Article and Find Full Text PDFGravitational Metrological Triangle.
Phys Rev Lett
December 2024
Fundamentale Physik für Metrologie FPM, Physikalisch-Technische Bundesanstalt PTB, Bundesallee 100, 38116 Braunschweig, Germany.
Motivated by the similarity of the mathematical structure of Einstein's general relativity in its weak field limit and of Maxwell's theory of electrodynamics it is shown that there are gravitational analogs of the Josephson effect and the quantum Hall effect. These effects can be combined to derive a gravitational analogue of the electric quantum metrological triangle. The gravitational quantum metrological triangle may have applications in metrology and could be used to investigate the relation of the Planck constant to fundamental particle masses.
View Article and Find Full Text PDFRecommendations for assessing commutability of a replacement batch of a secondary calibrator certified reference material.
Clin Chim Acta
February 2025
Laboratoire national de métrologie et d'essais, Paris, France.
Article Synopsis
- - Commutable secondary certified reference materials (CRMs) are crucial for ensuring consistent results in medical lab tests, highlighting the need for their sustainable availability.
- - The IFCC Working Group has released recommendations for assessing the commutability of these CRMs, although detailed studies can strain resources for producers.
- - A new equivalence assessment method allows for comparing replacement CRMs with established ones, potentially reducing resource needs while ensuring reliability through the inclusion of representative clinical samples.
Monte Carlo bottom-up evaluation of the uncertainty of quantification of heavy metals analysis in acid mine drainage by ICP-OES.
Talanta
April 2025
School of Earth Sciences and Resources, Chang'An University, 710054, Xi'an, China.
Many instrumental quantifications for heavy metals require the establishment of the calibration curve between calibrator's signals and mass concentrations based on linear regression model. However, linear fitting based on the ordinary least squares regression model faces the challenges from the instruments, such as homoscedasticity of signals, which may result in the poor performance for the measurement of low mass concentration. In comparison, the linear weighted regression model in many studies has been proven to better address the problem of heteroscedasticity in inductively coupled plasma emission spectrometer (ICP-OES).
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