Search results

1

Stress and strain measurements in static tensile tests

100%

Adamczak S., Bochnia J., Kundera C.

Metrology and Measurement Systems

|

2012

|

issue 3

2

Evaluation of Accuracy of the Body Composition Measurements by the BIA Method

100%

Kutáč P., Gajda V.

Human Movement

|

2011

|

vol. 12

|

issue 1

41-45

EN

Purpose. The main purpose of this study is to verify the accuracy of body composition measurements by the BIA method, using TANITA 418 MA unit. Basic procedures. For purposes of our study we decided to use the type-A uncertainty evaluation method (statistical processing of measured data). To formulate diagnostic error for the BIA method we used typical (standard) error of measurement from differences between pairs of repeated measurements - which is in principle a mean error of the test. The research was carried out on a group of 10 students whose field of study is physical education and sport. These students were chosen from the total number of 74 students in such a way that they represent as wide range of fat fraction as possible. Representation of their fat fraction oscillated between 9.0 to 31.2% of body fat. Input value of body fat, which was the basic criterion for selection of students to the measurement etalon, was determined by the DEXA method. Main findings. We described the uncertainty (type A) in selected file of etalons by an average value and by a standard deviation in percentage of fat: 0.13 ± 0.05. A diagnostic error of the method expressed by means of typical (standard) error of measurement was 0.38% of body fat. Conclusion. Considering the detected values of uncertainty (type A) and of typical error of measurement, we can conclude that measurement of body composition by the BIA method using TANITA 418 MA unit is sufficiently accurate for requirements of practical use. The necessary condition for the above mentioned measurement accuracy is a strict observance of standard measurement conditions.

3

Uncertainty of nitrate and sulphate measured by ion chromatography in wastewater samples

100%

Tepuš B., Simonič M.

Open Chemistry

|

2007

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vol. 5

|

issue 2

557-569

EN

This paper presents an evaluation of measurement uncertainty regarding the results of anion (nitrate and sulphate) concentrations in wastewater. Anions were determined by ion chromatography (EN ISO 10304-2, 1996). The major sources of uncertainty regarding the measurements’ results were identified as contributions to linear least - square or weighted regression lines, precision, trueness, storage conditions, and sampling. Determination of anions in wastewater is very important for the purification procedure, especially the amount of nitrate in waste and potable waters. The determined expanded uncertainty was 6.1 % for nitrate anions and 8.3 % for sulphate anions. The difference between measurement uncertainties determined by the two methods, the weighted and linear least - square methods, is negligible. [...]

4

Uncertainty Interval Evaluation Using the Chi-Square and Fisher Distributions in the Measurement Process

100%

Catelani M., Zanobini A., Ciani L.

Metrology and Measurement Systems

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2010

|

issue 2

5

Application Of Bias Randomization In Evaluation Of Measuring Instrument Capability

100%

Fotowicz P.

Metrology and Measurement Systems

|

2015

|

vol. 22

|

issue 4

6

Estimating the Uncertainty of Tensile Strength Measurement for A Photocured Material Produced by Additive Manufacturing

100%

Adamczak S., Bochnia J., Kaczmarska B.

Metrology and Measurement Systems

|

2014

|

issue 3

7

Analysis of Applicability of Flow Averaging Pitot Tubes in the Areas of Flow Disturbance

100%

Pochwała S., Pospolita J.

Metrology and Measurement Systems

|

2016

|

vol. 23

|

issue 1

8

An Analysis Of Tensile Test Results to Assess the Innovation Risk for an Additive Manufacturing Technology

100%

Adamczak S., Bochnia J., Kaczmarska B.

Metrology and Measurement Systems

|

2015

|

vol. 22

|

issue 1

9

A Monte Carlo-Based Method for Assessing the Measurement Uncertainty in the Training and Use of Artificial Neural Networks

88%

Coral R., Flesch C. A., Penz C. A., Roisenberg M., Pacheco A. L. S.

Metrology and Measurement Systems

|

2016

|

vol. 23

|

issue 2

10

Standard Deviation of the Mean of Autocorrelated Observations Estimated with the Use of the Autocorrelation Function Estimated From the Data

75%

Zięba A., Ramza P.

Metrology and Measurement Systems

|

2011

|

issue 4

11

Critical Metrological Evaluation of Fuel Analyses by Measurement Uncertainty

75%

de O. E.

Metrology and Measurement Systems

|

2011

|

issue 2

12

Uncertainty analysis of measuring system for instantaneous power research

75%

Dzwonkowski A., Swędrowski L.

Metrology and Measurement Systems

|

2012

|

issue 3

13

Methodology for testing the electric strength of vacuum chambers designed for modern medium voltage switchgear

75%

Węgierek P., Lech M., Kozak C., Pastuszak J., Węgierek P., Lech M., Kozak C., Pastuszak J.

Metrology and Measurement Systems

|

2020

|

vol. 27

|

issue 4

14

Analysis of the measurement uncertainty during calibration of radioherapy and radiodiagnostics dosemeters at the Polish Secondary Standard Dosimetry Laboratory

75%

Ulkowski P., Bulski W., Gwiazdowska B.

Polish Journal of Medical Physics And Engineering

|

2011

|

vol. 17

|

issue 4

173-188

PL

Celem pracy było opracowanie metody szacowania niepewności i wstępne określenie wartości szacowanych wielkości w przypadku wzorcowanych w LWWD dawkomierzy. Zastosowano metodę obliczania niepewności typu A i B wg międzynarodowej normy ISO. Uwzględniono stosowany w LWWD sposób wzorcowania dawkomierzy wg raportów Międzynarodowej Agencji Energii Atomowej. Przedstawione wyniki dotyczą wszystkich wzorcowanych w LWWD dawkomierzy. Zarówno szczegółowa analiza wszystkich etapów wzorcowania jak i otrzymane wyniki wskazują, że niepewność pomiarów jest w zakresie akceptowanym przez Polskie Centrum Akredytacji.

EN

The aim of the study was to work out a method of establishing the measurement uncertainty and determination of uncertainty values for calibration of dosemeters at the SSDL. For the determination of type A and B uncertainties, a method according to iternational ISO standard was used. The calibration procedures used at the SSDL, consistent with the reports of the International Atomic Energy Agency, were taken into account. The presented results apply to all dosimeters calibrated at the SSDL. The detailed analysis of every step of the calibration procedures and the results obtained show that the measurement uncertinty is within the limits accepted by the Polish Centre for Accreditation.

15

Traceability of gas flow measurements in complex distribution systems − uncertainty approach vs error approach

75%

Džemić Z., Širok B., Drnovšek J.

Metrology and Measurement Systems

|

2019

|

vol. 26

|

issue 2

16

Evaluation of Perfusion and Thermal Parameters of Skin Tissue Using Cold Provocation and Thermographic Measurements

75%

Strąkowska M., Strąkowski R., Strzelecki M., de Mey G., Więcek B.

Metrology and Measurement Systems

|

2016

|

vol. 23

|

issue 3

17

Systematic Effect as a Part of the Coverage Interval

75%

Fotowicz P.

Metrology and Measurement Systems

|

2010

|

issue 3

18

Wideband Nine-Port Reflectometer

63%

Odrobina S., Staszek K., Wincza K., Gruszczyński S.

International Journal of Electronics and Telecommunications

|

2018

|

vol. 64

|

issue 1

Refine search results

Stress and strain measurements in static tensile tests

Evaluation of Accuracy of the Body Composition Measurements by the BIA Method

Uncertainty of nitrate and sulphate measured by ion chromatography in wastewater samples

Uncertainty Interval Evaluation Using the Chi-Square and Fisher Distributions in the Measurement Process

Application Of Bias Randomization In Evaluation Of Measuring Instrument Capability

Estimating the Uncertainty of Tensile Strength Measurement for A Photocured Material Produced by Additive Manufacturing

Analysis of Applicability of Flow Averaging Pitot Tubes in the Areas of Flow Disturbance

An Analysis Of Tensile Test Results to Assess the Innovation Risk for an Additive Manufacturing Technology

A Monte Carlo-Based Method for Assessing the Measurement Uncertainty in the Training and Use of Artificial Neural Networks

Standard Deviation of the Mean of Autocorrelated Observations Estimated with the Use of the Autocorrelation Function Estimated From the Data

Critical Metrological Evaluation of Fuel Analyses by Measurement Uncertainty

Uncertainty analysis of measuring system for instantaneous power research

Methodology for testing the electric strength of vacuum chambers designed for modern medium voltage switchgear

Analysis of the measurement uncertainty during calibration of radioherapy and radiodiagnostics dosemeters at the Polish Secondary Standard Dosimetry Laboratory

Traceability of gas flow measurements in complex distribution systems − uncertainty approach vs error approach

Evaluation of Perfusion and Thermal Parameters of Skin Tissue Using Cold Provocation and Thermographic Measurements

Systematic Effect as a Part of the Coverage Interval

Wideband Nine-Port Reflectometer