Institute of Metrology and Biomedical Engineering

Warsaw, Poland

Institute of Metrology and Biomedical Engineering

Warsaw, Poland
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Cybulski G.,Institute of Metrology and Biomedical Engineering | Cybulski G.,Polish Academy of Sciences | Kozluk E.,Medical University of Warsaw | Piatkowska A.,Medical University of Warsaw | And 4 more authors.
Computing in Cardiology | Year: 2016

The aim of the study was to evaluate short-term changes in hemodynamic parameters observed in supine and tilted positions. Six young women (age: 21-25) participated in the study. The cardiac inter-beat interval (RR), stroke volume (SV), ejection time (ET) and pre-ejection period (PEP) parameters were followed over two six-minute periods, in supine position and 10 minutes after a 60-degree head-up tilting manoeuvre, using continuously recorded impedance cardiography (ICG) and electrocardiography (ECG) signals. Hemodynamic variability was evaluated using standard deviation (SD), coefficient of variation (CV) and quartile deviation (QD). For the supine position, the mean (M), SD, CV and QD of the observed parameters were as follows. SV: 66 ml, 11 ml, 17.5 %, 16 ml. RR: 878 ms, 100 ms, 11.2 %, 111 ms. ET: 292 ms, 32 ms, 11.4 %, 47 ms. PEP: 115 ms, 15 ms, 13.4 %, 19 ms. In the tilted position, the following were observed. SV: 53 ml, 10 ml, 19.8 %, 12.5 ml. RR: 736 ms, 88 ms, 11.8 %, 74 ms. ET: 252 ms, 30 ms, 11.7 %, 23 ms. PEP: 134 ms, 12 ms, 9 %, 13 ms. The changes in hemodynamic variability caused by tilting are not unidirectional. © 2016 CCAL.


Korobiichuk I.,Industrial Research Institute for Automation and Measurements PIAP | Podchashinskiy Y.,Zhytomyr State Technological University | Lugovyh O.,Zhytomyr State Technological University | Nowicki M.,Institute of Metrology and Biomedical Engineering | Kachniarz M.,Industrial Research Institute for Automation and Measurements PIAP
Measurement: Journal of the International Measurement Confederation | Year: 2017

This article considers the mathematical models and methods of identifying the video image dynamic errors. These movies contain information on measuring the geometric parameters and motion parameters of natural stone products and equipment used in their manufacture. The details of dynamic errors are required to develop the algorithmic procedures of their compensation and to improve the accuracy of measuring these geometrical and motion parameters of the measurement object. © 2017 Elsevier Ltd


Salach J.,Institute of Metrology and Biomedical Engineering | Szewczyk R.,Industrial Research Institute for Automation and Measurements | Bienkowski A.,Institute of Metrology and Biomedical Engineering | Jackiewicz D.,Institute of Metrology and Biomedical Engineering
Solid State Phenomena | Year: 2013

Paper discusses the possible of application of iron-based amorphous Fe77Cr2B16Si5 alloys for tensile force sensors. In proposed sensor uniform stresses were generated in direction of the ribbon ring core axis. As a result stresses were perpendicular to the magnetizing field direction, what increases sensor sensitivity as well as simplified analyses. The results show high magnetoelastic sensitivity of Fe77Cr2B16Si5 amorphous alloy. Moreover, this magnetoelastic sensitivity increases during the annealing process, which is connected with thermal relaxation of amorphous alloy. © (2013) Trans Tech Publications, Switzerland.


Jackiewicz D.,Institute of Metrology and Biomedical Engineering | Salach J.,Institute of Metrology and Biomedical Engineering | Szewczyk R.,Institute of Metrology and Biomedical Engineering | Bienkowski A.,Institute of Metrology and Biomedical Engineering
Lecture Notes in Mechanical Engineering | Year: 2015

Paper presents the results of investigation on the tensile stresses dependence of magnetic characteristics of the heat resistant 13CrMo4-5 steel. For this investigation, the frame-shaped samples were used. Due to the specialized force reversing system, compressive force generates the uniform tensile stresses in the sample. Magnetic characteristics are measured under these stresses by digitally controlled hysteresis graph. On the base of results of measurements the magnetoelastic characteristics of resistant 13CrMo4-5 steel were determined. These characteristics indicate that change from elastic to plastic deformation significantly changes the magnetic properties of this steel. This information has great technical importance from the point of view of non-destructive testing of construction elements made of heat resistant 13CrMo4-5 steel. © Springer International Publishing Switzerland 2015.


Jackiewicz D.,Institute of Metrology and Biomedical Engineering | Szewczyk R.,Institute of Metrology and Biomedical Engineering | Salach J.,Institute of Metrology and Biomedical Engineering
Solid State Phenomena | Year: 2013

This paper concerns the possibility of use of the Jiles-Atherton-Sablik extended model to describe the magnetic characteristics for construction steel ST3. Result of the modelling utilizing extended Jiles-Atherton-Sablik model are in good agreement with results of experimental measurements for magnetic hysteresis loops B(H). However experimental results indicated, that the influence of temperature on B(H) characteristics is relatively small and can be neglected from the point of view of modelling for technical applications, such as stress estimation for non-destructive testing. © (2013) Trans Tech Publications, Switzerland.


Szewczyk R.,Institute of Metrology and Biomedical Engineering | Jackiewicz D.,Institute of Metrology and Biomedical Engineering
Solid State Phenomena | Year: 2015

The application of magnetic-property oriented methods for non-destructive testing is very promising due to its low cost and robustness. This paper presents the methodology of simulating the magnetic properties of martensitic X30Cr13 steel applying the extended Jiles-Atherton model. On the basis of experimental measurements, the parameters of the Jiles-Atherton model were determined by an evolutionary strategy together with gradient optimisation. A very good agreement between experimental hysteresis loops and the model was confirmed by a high value of determination coefficient. The presented results open new possibilities of developing methods for non-destructive testing of energetic turbines made of X30Cr13 stainless steel. Moreover, quantitative simulation gives a possibility of a better understanding of magnetisation processes. © (2015) Trans Tech Publications, Switzerland.

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