scholarly journals Application Of Bias Randomization In Evaluation Of Measuring Instrument Capability

2015 ◽  
Vol 22 (4) ◽  
pp. 513-520
Author(s):  
Paweł Fotowicz
Keyword(s):  
Measurement Uncertainty ◽  
Significant Role ◽  
Gaussian Distribution ◽  
Uncertainty Budget ◽  
Systematic Effect ◽  
Measuring Instrument ◽  
Rectangular Distribution ◽  
Modern Metrology ◽  
Randomization Method ◽  
Instrument Quality

Abstract The paper deals with the problem of bias randomization in evaluation of the measuring instrument capability. The bias plays a significant role in assessment of the measuring instrument quality. Because the measurement uncertainty is a comfortable parameter for evaluation in metrology, the bias may be treated as a component of the uncertainty associated with the measuring instrument. The basic method for calculation of the uncertainty in modern metrology is propagation of distributions. Any component of the uncertainty budget should be expressed as a distribution. Usually, in the case of a systematic effect being a bias, the rectangular distribution is assumed. In the paper an alternative randomization method using the Flatten-Gaussian distribution is proposed.

Traceability of on-machine tool measurement: Uncertainty budget assessment on shop floor conditions

Measurement ◽  
2019 ◽  
Vol 135 ◽  
pp. 180-188 ◽  
Author(s):  
Unai Mutilba ◽  
Alejandro Sandá ◽  
Ibon Vega ◽  
Eneko Gomez-Acedo ◽  
Ion Bengoetxea ◽  
...  
Keyword(s):  
Machine Tool ◽  
Measurement Uncertainty ◽  
Uncertainty Budget ◽  
Shop Floor ◽  
Measurement Uncertainty Budget

scholarly journals Peran Pengasuhan Otoritatif Terhadap Patriotisme Remaja: Dengan Mediator Kepuasan Hidup Dan Nasionalisme

2018 ◽  
Vol 24 (3) ◽  
pp. 326
Author(s):  
Agoes Dariyo
Keyword(s):  
Life Satisfaction ◽  
Significant Role ◽  
Quantitative Research ◽  
Statistical Tests ◽  
Authoritative Parenting ◽  
Measuring Instrument ◽  
Non Linear ◽  
Parenting Role ◽  
Role Of Parents

ABSTRACTThis study  aimed to found out the authoritative parenting role of parents to developed  adolescent nationalism and patriotism in the framework of national resilience. Quantitative research by taking data using a Likert scale measuring instrument in the form of questionnaires, namely authoritative parenting, life-satisfaction, nationalism and patriotism. The subjects involved in this study amounted to 186 adolescents (male = 99 and female = 87 female, with an average age of 18.1 years). Furthermore, the collected data were analyzed using statistical tests, namely logarithmic non-linear regression. The results showed that (a) parents' authoritative parenting played a significant role in developing adolescent nationalism and patriotism in the framework of achieving national resilience, (b) authoritative parenting parents played a significant role in achieving teen life satisfaction so that they also developed nationalism and patriotism in the framework of national resilience, (c) youth realized that the state hadfacilitated its citizens to had jobs so that parents were able to meet the needs of life for teenagers. Thus, they as teenagers were aware of being citizens who had nationalism and patriotism in their lives. ABSTRAKPenelitian ini bertujuan mengetahui peran pengasuhan otoritatif  orangtua untuk menumbuhkembangkan sikap nasionalismedan patriotisme remaja  dalam kerangka ketahanan nasional.Penelitian bersifat kuantitatif dengan pengambilan data menggunakan alat ukur skala Likert berupa kuesioner yaitu pola asuh otoritatif, kepuasan hidup, nasionalisme dan patriotisme. Subjek yang terlibat dalam penelitian ini berjumlah 186 remaja (laki-laki = 99 orang dan perempuan = 87 perempuan, dengan rerata usia 18,1 tahun). Selanjutnya, data yang terkumpul dianalisis dengan menggunakan uji statistik yaitu regresi non-linear logaritmik.Hasil penelitian menunjukkan bahwa (a) pola asuh otoritatif orangtuaberperan secara signifikan dalam menumbuh-kembangkan sikap nasionalisme dan patriotismeremaja dalam kerangka mencapai ketahanan nasional, (b) pola asuh otoritatif orangtua berperan secara signifikan dalam mencapai kepuasan hidup remaja sehingga mereka pun akan menumbuhkembangkan sikap nasionalismedan patriotisme dalam kerangka ketahanan nasional, (c) remaja menyadari bahwa negara telah memfasilitasi warganya untuk memiliki pekerjaan sehingga orangtua  mampu memenuhi kebutuhan hidup bagi anak remaja. Dengan demikian,  mereka sebagai remaja sadar untuk menjadi warga-negara yang memiliki sikap nasionalisme dan patriotisme dalam hidupnya.

scholarly journals A practical approach to evaluate the measurement uncertainty budget for calibration of strain gauge based high-precision carrier frequency amplifiers

ACTA IMEKO ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 210
Author(s):  
Marco M. Schäck
Keyword(s):  
Measurement Uncertainty ◽  
High Precision ◽  
Strain Gauge ◽  
Carrier Frequency ◽  
Uncertainty Budget ◽  
Point Of View ◽  
Precision Measurements ◽  
Frequency Method ◽  
Physical Limit ◽  
Measurement Uncertainty Budget

For high-precision measurements of strain gauge-based transducers, 225 Hz carrier frequency measuring amplifiers are primarily used. The benefits of this carrier frequency method were discussed in previous publications. This publication shows the measurement uncertainty that can be achieved by calibrating an amplifier based on this method. Possibilities for improving the measurement uncertainty and the physical limit from the user's point of view are shown.

Measurement Uncertainty

2007 ◽  
Author(s):  
D. Brynn Hibbert
Keyword(s):  
Measurement Uncertainty ◽  
Uncertainty Budget ◽  
Test Material ◽  
Metrology In Chemistry ◽  
Energy Agency ◽  
Long Run ◽  
Measurement Results ◽  
Trading Partners ◽  
History Of ◽  
Student’S T

One of the great revolutions in metrology in chemistry has been the understanding of the need to quote an appropriate measurement uncertainty with a result. For some time, a standard deviation determined under not particularly well-defined conditions was considered a reasonable adjunct to a measurement result, and multiplying by the appropriate Student’s t value gave the 95% confidence interval. But knowing that in a long run of experiments repeated under identical conditions 95% of the 95% confidence intervals would include the population mean did not answer the fundamental question of how good the result was. This became evident as international trade burgeoned and more and more discrepancies in measurement results and disagreements between trading partners came to light. To determine if two measurements of ostensibly the same measurand on the same material give results that are equivalent, they must be traceable to the same metrological reference and have stated measurement uncertainties. How to achieve that comparability is the subject of this chapter and the next. When making a chemical measurement by taking a certain amount of the test material, working it up in a form that can be analyzed, calibrating the instrument, and performing the measurement, analysts understand that there will be some doubt about the result. Contributions to uncertainty derive from each step in the analysis, and even from the basis on which the analysis is carried out. An uncertainty budget documents the history of the assessment of the measurement uncertainty of a result, and it is the outcome of the process of identifying and quantifying uncertainty. Although the client may only receive the fruits of this process as (value ± expanded uncertainty), accreditation to ISO/IEC 17025 requires the laboratory to document how the uncertainty is estimated. Estimates of plutonium sources highlight the importance of uncertainty. The International Atomic Energy Agency (IAEA) estimates there are about 700 tonnes of plutonium in the world. The uncertainty of measurement of plutonium is of the order of 0.1%, so even if all the plutonium were in one place, when analyzed the uncertainty would be 700 kg (1000 kg = 1 tonne). Seven kilograms of plutonium makes a reasonable bomb.

scholarly journals Precise linear measurements using a calibrated reference workpiece without temperature measurements

2018 ◽  
Vol 7 (2) ◽  
pp. 609-620 ◽  
Author(s):  
Dmytro Sumin ◽  
Rainer Tutsch
Keyword(s):  
Thermal Expansion ◽  
Measurement Uncertainty ◽  
Temperature Measurements ◽  
Coordinate Measuring Machines ◽  
Measuring Instrument ◽  
Linear Measurements ◽  
Linear Measuring ◽  
Require Temperature ◽  
Linear Measuring Instrument

Abstract. We suggest a procedure for the correction of the errors caused by thermal expansion of a workpiece and the scale of a linear measuring instrument (coordinate measuring machines, length measuring machines, etc.) when linear measurements are performed at nonstandard temperature. We use a calibrated reference workpiece but do not require temperature measurements. An estimation of the measurement uncertainty and application examples are given.

scholarly journals Multi-component measuring device - completion, measurement uncertainty budget and signal cross-talk for combined load conditions

ACTA IMEKO ◽  
2017 ◽  
Vol 6 (4) ◽  
pp. 89
Author(s):  
Sebastian Baumgarten ◽  
Dirk Röske ◽  
Rolf Kumme
Keyword(s):  
Measurement Uncertainty ◽  
Maximum Load ◽  
Uncertainty Budget ◽  
Font Size ◽  
Simultaneous Generation ◽  
Measuring Device ◽  
Combined Loads ◽  
Axial Forces ◽  
Measurement Uncertainty Budget

<p> </p><p><span style="font-family: Calibri;"><span style="font-size: small;">This paper present the completion and the measurement uncertainty budget of a multi-component measuring facility. The new facility is part of the 1 MN force standard machine [1] of the PTB. It enables the simultaneous generation of a torque in the range from 20 N·m to 2 kN·m in addition to axial forces 20 kN to 1 MN. This allows the characterization of measuring systems which require combined loads of axial forces <em>F</em></span><sub><span style="font-size: xx-small;">z</span></sub><span style="font-size: small;"> and torques <em>M</em></span><sub><span style="font-size: xx-small;">z</span></sub><span style="font-size: small;"> like friction coefficient sensors. The aim is a measurement uncertainty of (<em>k</em> = 2) for <em>M</em></span><sub><span style="font-size: xx-small;">z</span></sub><span style="font-size: small;"> &lt; 0.01 % and <em>F</em></span><sub><span style="font-size: xx-small;">z</span></sub><span style="font-size: small;"> &lt; 0.002 %. The physical model yields to extended measurement uncertainties (<em>k</em> = 2) for 20 N·m of 5.9·10</span><sup><span style="font-size: xx-small;">-5</span></sup><span style="font-size: small;"> and for the maximum load step <span><em>M</em></span><sub><span>z</span></sub> = (2000 ± 0.084) N·m.</span></span></p><p> </p>

scholarly journals AC/DC transfer standards calibration in Central Military Calibration Laboratory

2017 ◽  
Vol 66 (4) ◽  
pp. 217-228
Author(s):  
Przemysław Piróg ◽  
Mariusz Górecki
Keyword(s):  
Measurement Uncertainty ◽  
Metrological Traceability ◽  
Uncertainty Budget ◽  
Voltage Measurement ◽  
Measurement Equation ◽  
Calibration Laboratory ◽  
Transfer Standard ◽  
Thermal Voltage

The article discusses the method used in the Central Military Calibration Laboratory to calibrate Fluke 5790 AC/DC transfer standard with reference transfer standard Fluke 792A. It presents the measurement equation and the uncertainty budget. The contribution of uncertainty components in the measurement uncertainty has been presented. The metrological traceability has been evaluated by comparing calibration results with the results in the last Fluke certificate of calibration. Keywords: AC/DC converters, AC/DC difference, thermal voltage converters (TVCs), AC voltage measurement.

scholarly journals Systematic comparison of post-column isotope dilution using LC-CO-IRMS with qNMR for amino acid purity determination

2019 ◽  
Vol 411 (27) ◽  
pp. 7207-7220
Author(s):  
Philip J. H. Dunn ◽  
Dmitry Malinovsky ◽  
Eli Achtar ◽  
Cailean Clarkson ◽  
Heidi Goenaga-Infante
Keyword(s):  
Measurement Uncertainty ◽  
Isotope Dilution ◽  
International System ◽  
Direct Analysis ◽  
Uncertainty Budget ◽  
Chemical Oxidation ◽  
Resonance Spectroscopy ◽  
Purity Determination ◽  
System Of Units

Abstract Determination of the purity of a substance traceable to the International System of Units (SI) is important for the production of reference materials affording traceability in quantitative measurements. Post-column isotope dilution using liquid chromatography-chemical oxidation-isotope ratio mass spectrometry (ID-LC-CO-IRMS) has previously been suggested as a means to determine the purity of organic compounds; however, the lack of an uncertainty budget has prevented assessment of the utility this approach until now. In this work, the previously published ID-LC-CO-IRMS methods have not only been improved by direct gravimetric determination of the mass flow of 13C-labelled spike but also a comprehensive uncertainty budget has been established. This enabled direct comparison of the well-characterised ID-LC-CO-IRMS method to quantitative nuclear magnetic resonance spectroscopy (qNMR) for purity determination using valine as the model compound. The ID-LC-CO-IRMS and qNMR methods provided results that were in agreement within the associated measurement uncertainty for the purity of a sample of valine of (97.1 ± 4.7)% and (99.64 ± 0.20)%, respectively (expanded uncertainties, k = 2). The magnitude of the measurement uncertainty for ID-LC-CO-IRMS determination of valine purity precludes the use of this method for determination of purity by direct analysis of the main component in the majority of situations; however, a mass balance approach is expected to result in significantly improved measurement uncertainty.

Decision Rules and Risk Analysis

2014 ◽  
Vol 625 ◽  
pp. 26-33 ◽  
Author(s):  
Michael Krystek
Keyword(s):  
Measurement Uncertainty ◽  
Decision Rules ◽  
Uncertainty Budget ◽  
Economic Consequences ◽  
Manufactured Products ◽  
Acceptance Limits ◽  
The Stability ◽  
The Relationship ◽  
Product Specification

Measurement uncertainty has important economic consequences for calibration and inspection activities and is often taken as an indication of the quality of a test laboratory. Smaller uncertainty values are generally of higher value. In industry decision rules employed in accepting and rejecting products are based on the measurement uncertainty budget of the related characteristics of the products. Conformity assessment based on the product specification and the measurement evaluation is an important part of the industrial quality assurance of manufactured products and for the stability of production processes. The aim of this paper is to describe the relationship between the conformance zone and the acceptance zone and to address the problem of determining acceptance limits that define the boundaries of the acceptance zone.

Comparison between bottom-up and top-down approaches in the estimation of measurement uncertainty

2015 ◽  
Vol 53 (7) ◽  
Author(s):  
Jun Hyung Lee ◽  
Jee-Hye Choi ◽  
Jae Saeng Youn ◽  
Young Joo Cha ◽  
Woonheung Song ◽  
...  
Keyword(s):  
Measurement Uncertainty ◽  
Uncertainty Budget ◽  
Internal Quality ◽  
Systematic Bias ◽  
Top Down ◽  
Bottom Up ◽  
Sources Of Uncertainty ◽  
Clinical Laboratories ◽  
Measurement Results ◽  
Low Glucose

AbstractMeasurement uncertainty is a metrological concept to quantify the variability of measurement results. There are two approaches to estimate measurement uncertainty. In this study, we sought to provide practical and detailed examples of the two approaches and compare the bottom-up and top-down approaches to estimating measurement uncertainty.We estimated measurement uncertainty of the concentration of glucose according to CLSI EP29-A guideline. Two different approaches were used. First, we performed a bottom-up approach. We identified the sources of uncertainty and made an uncertainty budget and assessed the measurement functions. We determined the uncertainties of each element and combined them. Second, we performed a top-down approach using internal quality control (IQC) data for 6 months. Then, we estimated and corrected systematic bias using certified reference material of glucose (NIST SRM 965b).The expanded uncertainties at the low glucose concentration (5.57 mmol/L) by the bottom-up approach and top-down approaches were ±0.18 mmol/L and ±0.17 mmol/L, respectively (allWe presented practical and detailed examples for estimating measurement uncertainty by the two approaches. The uncertainties by the bottom-up approach were quite similar to those by the top-down approach. Thus, we demonstrated that the two approaches were approximately equivalent and interchangeable and concluded that clinical laboratories could determine measurement uncertainty by the simpler top-down approach.

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