Article
Medical Laboratory Technology
Wytze P. Oosterhuis, Abdurrahman Coskun, Sverre Sandberg, Elvar Theodorsson
Summary: To improve the quality in clinical laboratories, reliable methods are needed to quantify and set goals for the performance of measuring systems. The conventional model for calculating total error is flawed and alternative methods, including measurement uncertainty models, are proposed. The present paper critically discusses current methods for establishing performance specifications using sodium concentrations as an example.
CLINICA CHIMICA ACTA
(2023)
Article
Optics
Dede Zhai, Jingyang Guo, Shanyong Chen, Wenwen Lu
Summary: In this study, a new method for measuring the surface error and thickness variation of hemispherical resonators is proposed. By designing a multi-axis platform for noncontact sensor scanning measurements, an error model of the measurement system is established, and high precision and high repeatability measurements are achieved through calibration and compensation using a standard sphere.
Article
Multidisciplinary Sciences
Ben Lambert, Chon Lok Lei, Martin Robinson, Michael Clerx, Richard Creswell, Sanmitra Ghosh, Simon Tavener, David J. Gavaghan
Summary: Ordinary differential equation models are commonly used in biology to describe dynamic processes. However, when performing likelihood-based parameter inference on these models, the contribution of factors not explicitly included in the mathematical model needs to be represented. Independent Gaussian noise is often chosen as a statistical process, assuming random latent factors. This study demonstrates that highly persistent differences between observations and model quantities can occur, and using the wrong noise assumption can lead to artificial reduction of uncertainty in parameter estimation. They propose a workflow to diagnose and remodel for correlated errors.
JOURNAL OF THE ROYAL SOCIETY INTERFACE
(2023)
Article
Optics
Masashi Ota, Keita Yamaguchi, Kenya Suzuki
Summary: We propose a high-throughput and precise waveguide-dimensional-measurement method using a generative adversarial network (GAN) and curve-fitting-based dimensional calculator. The GAN can learn and differentiate optical microscope images taken with different objective lenses and magnifications, and precise measurement is achieved using super-resolution images.
Article
Anesthesiology
Piet A. H. Wyffels, Stefan De Hert, Patrick F. Wouters
Summary: The study aims to quantify and compare measurement errors associated with pulse pressure variation (PPV) calculations. The findings suggest that all methods that calculate PPV come with varying degrees of uncertainty, and accounting for bias and precision is important for interpreting measured PPV values or changes.
JOURNAL OF CLINICAL MONITORING AND COMPUTING
(2023)
Article
Medical Laboratory Technology
Aasne K. Aarsand, Ann Helen Kristoffersen, Sverre Sandberg, Bard Stove, Abdurrahman Coskun, Pilar Fernandez-Calle, Jorge Diaz-Garzon, Elena Guerra, Ferruccio Ceriotti, Niels Jonker, Thomas Roraas, Anna Carobene
Summary: The study used samples from the European Biological Variation Study (EuBIVAS) to determine the biological variation of coagulation markers using a Bayesian model. The results showed that for most coagulation markers, a common CVI estimate for men and women is applicable, while sex-specific reference change values should be applied for APTT, protein C, and protein S free. The use of a Bayesian model improved the interpretation and application of the data.
CLINICAL CHEMISTRY
(2021)
Article
Physics, Multidisciplinary
Ya-Li Mao, Hu Chen, Chang Niu, Zheng-Da Li, Sixia Yu, Jingyun Fan
Summary: This paper reports the first experimental study of MURs of three quantum observables and proposes a novel implementation method. The exact value of the incompatibility measure and the optimal measurements are determined using a numerical method, and several experimental demonstrations are conducted using a single-photon qubit. Besides, it is theoretically shown that MURs for joint measurement can be attained by sequential measurements in certain cases.
PHYSICAL REVIEW LETTERS
(2023)
Review
Chemistry, Multidisciplinary
Jaroslaw Chrzanowski, Tadeusz Salacinski, Pawel Skiba
Summary: The condition of the spindle is crucial to the quality and operation of the machine tool. This paper discusses measurement methods for spindle error movements and their impact on workpiece quality, including requirements from European and American standards. The article also outlines current research directions and presents the authors' own work in this field.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Multidisciplinary
Pratyush Kumar, U. Saravanan
Summary: The systematic error arising from the local uniform approximation of a non-uniform displacement gradient in in-plane periodical varying displacement gradient was investigated using the Taylor method. An alternate error bound, based on Fourier representation, was proposed to provide a tighter bound and explanation for experimental observations. Experimental investigation on a plain concrete cylinder subjected to uniaxial compression verified the analytical results. The most important findings are that strain measurement for a body exhibiting periodically varying displacement gradient is repeatable for a gauge length at least twice the displacement gradient periodicity but with significant error, and that orthogonal gauge orientation (0-45-90 rosette) yields more accurate strain measurement than skewed arrangement (0-60-120 rosette).
Article
Medical Laboratory Technology
Abdurrahman Coskun, Aasne K. Aarsand, Sverre Sandberg, Elena Guerra, Massimo Locatelli, Jorge Diaz-Garzon, Pilar Fernandez-Calle, Ferruccio Ceriotti, Niels Jonker, William A. Bartlett, Anna Carobene
Summary: This study provides updated biological variation estimates for several tumor markers, showing significant individual differences among them. The variations of several tumor markers in pre- and postmenopausal females were significantly different.
CLINICAL CHEMISTRY AND LABORATORY MEDICINE
(2022)
Article
Physics, Multidisciplinary
Uwe von Luepke, Yu Yang, Marius Bild, Laurent Michaud, Matteo Fadel, Yiwen Chu
Summary: The combination of mechanical resonators and superconducting circuits provides a promising platform for controlling non-classical mechanical states. In this study, we directly measure the parity of a motional quantum state using this platform. Furthermore, our results pave the way for conducting more complex quantum algorithms using mechanical systems.
Article
Engineering, Multidisciplinary
Benat Inigo, Ander Ibabe, Luis Norberto Lopez de Lacalle, Gorka Aguirre
Summary: This study proposes an artefact-based fast and automated solution for mapping volumetric errors in medium size 3-axis machine tools. It enables the calibration of a 1m3 workspace in less than 1 hour without prior knowledge of temperature variations. By performing continuous measurements for seven days and identifying a volumetric error variation model, this study estimates uncertainties of individual parameters and motion errors using residual errors and propagates them to the TCP through Monte Carlo simulations. The model is used to understand the changes in volumetric positioning error over time and its generation within the kinematic chain of the machine.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2023)
Article
Chemistry, Analytical
Lian Zhou, Nan Zheng, Jie Li, Zhigang Yuan, Jian Wang, Fei Fang, Qiao Xu
Summary: This paper proposes a splicing measurement method for the straightness error of guideways and studies the data processing algorithm. The correctness of the method is demonstrated through experiments, and an error compensation algorithm is proposed to suppress the influence of straightness error on machining accuracy.
Article
Optics
Yubo Li, Shan Jiang, Xingshuo Chen, Zhaowu Liu, Wei Wang, Ying Song
Summary: In order to improve the exposure contrast of the scanning beam interference lithography (SBIL) system, a mathematical model is established to analyze the effect of the direction error of the measurement mirror on the exposure contrast. An accurate method for interference fringe direction measurement is proposed, which combines the diffraction characteristics of the metrology grating and the phase shift algorithm. Experiments show that the smaller the angle between the interference fringe direction and the measurement mirror direction, the better the grating groove production by scanning exposure.
Article
Business, Finance
Bao Doan, John B. Lee, Qianqiu Liu, Jonathan J. Reeves
Summary: This paper studies CAPM beta measurement with high frequency returns and finds significant improvements in the trade-off between bias and variability.
FINANCE RESEARCH LETTERS
(2022)
Article
Hematology
Louisa Margit Lobigs, Pierre-Edouard Sottas, Pitre Collier Bourdon, Zoran Nikolovski, Mohamed El-Gingo, Evdokia Varamenti, Peter Peeling, Brian Dawson, Yorck Olaf Schumacher
AMERICAN JOURNAL OF HEMATOLOGY
(2017)
Meeting Abstract
Sport Sciences
Pitre C. Bourdon, Benjamin R. Haines, Glen Deakin
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
(2016)
Meeting Abstract
Sport Sciences
Fabricio Forchino, Stuart D. R. Galloway, Andrew Douglas, Anthony Hazeldine, Christopher Brandner, Pitre C. Bourdon
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
(2016)
Editorial Material
Physiology
Pitre C. Bourdon, Marco Cardinale, Warren Gregson, N. Timothy Cable
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2017)
Article
Physiology
Pitre C. Bourdon, Marco Cardinale, Andrew Murray, Paul Gastin, Michael Kellmann, Matthew C. Varley, Tim J. Gabbett, Aaron J. Coutts, Darren J. Burgess, Warren Gregson, N. Timothy Cable
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2017)
Meeting Abstract
Sport Sciences
Pitre C. Bourdon, Sally A. Clark, Robert J. Aughey, Tom Stanef, Sarah M. Woolford, Walter Schmidt, Christopher J. Gore
MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
(2017)
Article
Engineering, Biomedical
Benjamin Kane Williams, Ross H. Sanders, Joong Hyun Ryu, Pitre C. Bourdon, Philip Graham-Smith, Peter J. Sinclair
SPORTS BIOMECHANICS
(2019)
Article
Physiology
Pitre C. Bourdon, Sarah M. Woolford, Jonathan D. Buckley
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2018)
Article
Physiology
Sebastien Racinais, Julien D. Periard, Julien Piscione, Pitre C. Bourdon, Scott Cocking, Mohammed Ihsan, Mathieu Lacome, David Nichols, Nathan Townsend, Gavin Travers, Mathew G. Wilson, Olivier Girard
Summary: The study found that a 2-week elite team-sport training camp significantly improved maximal oxygen uptake, repeated-sprint ability, and aerobic performance in rugby players. However, adding heat and/or altitude training did not further enhance performance, and altitude training appeared to be detrimental to improving Yo-Yo performance.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2021)
Article
Sport Sciences
Branson L. Palmer, Grant E. van der Ploeg, Pitre C. Bourdon, Scott R. Butler, Robert G. Crowther
Summary: The growth of sport science technology enables sporting teams to monitor performance and workload of athletes. However, there is a lack of longitudinal athlete monitoring literature for youth athletes, especially in indoor sports like basketball. This study evaluated the effectiveness of different athlete monitoring methods over 10 weeks of youth basketball training. The findings showed that monitoring methods using IMU data combined with PlayerLoad data analysis were more effective in monitoring accumulated load compared to HR analysis. Despite small correlations, all six methods of athlete monitoring detected similar trends for all sessions.
Article
Physiology
Julien D. Periard, Oliver Girard, Nathan Townsend, Pitre Bourdon, Scott Cocking, Mohammed Ihsan, Mathieu Lacome, David Nichols, Gavin Travers, Mathew G. Wilson, Julien Piscione, Sebastien Racinais
Summary: The purpose of this study was to investigate the effects of a training camp with heat and/or hypoxia sessions on hematological and thermoregulatory adaptations. The results showed that blood and plasma volume increased following the camp. However, sleeping at altitude impeded the increase in hemoglobin mass and only marginally increased it when training in the heat.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Review
Sport Sciences
Samuel J. Janetzki, Pitre C. Bourdon, Kevin I. Norton, Jackson C. Lane, Clint R. Bellenger
Summary: Changes in the volume and intensity of AFL match demands occurred in discrete periods from 2007 to 2010 and 2010 to 2012, influenced by rule and interpretation changes as well as coaching strategies. Standardisation of GPS data reporting is recommended to address inconsistencies in the literature.
SPORTS MEDICINE-OPEN
(2021)
Article
Sport Sciences
Ratko Peric, Marco Meucci, Pitre C. Bourdon, Zoran Nikolovski
JOURNAL OF SPORTS MEDICINE AND PHYSICAL FITNESS
(2018)
Article
Biochemical Research Methods
Louisa M. Lobigs, Pierre-Edouard Sottas, Pitre C. Bourdon, Zoran Nikolovski, Mohamed El-Gingo, Evdokia Varamenti, Peter Peeling, Brian Dawson, Yorck O. Schumacher
DRUG TESTING AND ANALYSIS
(2018)
Article
Sport Sciences
S. C. Voss, Z. Nikolovski, P. C. Bourdon, M. Alsayrafi, Y. O. Schumacher