Fundamental concepts of measurement

Finkelstein, Louis

doi:10.21014/acta_imeko.v3i1.191

Cited by 3 publications

(1 citation statement)

References 16 publications

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“…Wykracza to poza metrologię traktowaną jako naukę o pomiarach i mieści się w szerszej dyscyplinie o ang. nazwie Measurement Science zaproponowanej przez lwowiaka prof. Ludwika Finkelsteina z City University w Londynie [5]. Obejmuje ona metrologię i podstawy teoretyczne budowy urządzeń i systemów pomiarowych.…”

Section: Wprowadzenieunclassified

Extended Method for Evaluation Uncertainties of Indirect Multi-Parameter Measurements and of Circuits for these Measurements. Part 2. Application on the Example of a System for Indirect Two-Parameter Measurements

Warsza¹,

Puchalski²

2019

PAR

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Section: Wprowadzenieunclassified

Extended Method for Evaluation Uncertainties of Indirect Multi-Parameter Measurements and of Circuits for these Measurements. Part 2. Application on the Example of a System for Indirect Two-Parameter Measurements

Warsza¹,

Puchalski²

2019

PAR

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Uncertainties of Multivariable Indirect Measurements of Dc Electrical Circuits

Warsza¹,

Measurements²,

Puchalski³

et al. 2018

MEM

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In this paper three examples of processing uncertainties of a indirect multi-variable measurement system are considered. It was proposed to extend the vector method of estimating measurement uncertainties, given in Supplement 2 to GUM, on the statistical description of the accuracy of whole ranges of indirect multivariable measurement system. Formula for the covariance matrix of relative uncertainties of the vector measurand is given. The covariance matrixes of uncertainties of few DC electrical measurement circuits are presented, i.e.: for indirect measurement of three resistances with using them in three variants of balanced Wheatstone bridge or without disconnection this circuit but with apply unconventional current supplies; the measurement of three internal resistances of the star circuit from its terminals and estimation of uncertainty of powers of two currents if two other currents are measured and their uncertainties are known. Formulas for absolute and relative uncertainties and their correlation coefficients are given. The general conclusion is that in the description accuracy of multivariable measurement systems the relative uncertainties are sometimes preferable than the absolute ones, and uncertainties of their main measurement functions have been also considered.

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Ethnomathematics in Kafa, Ethiopia: Number Sense and its Level of Inclusion in School Curriculum

Gebre

Kassa

Wodeyesus

2021

MEDITERR J J SOCI BEH RES

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The purpose of this study was to find out the indigenous number and number sense of people in Kafa and to explore its level of integration to school curriculum. To this end, the study followed a qualitative research method which utilized ethnographic case study (embedded) design. Data were collected from 22 key participants through interview, observation, and focus group discussion. In addition, content analysis was used to investigate the level of integration of number and number sense to school curriculum. Accordingly, the study found that base six (maqoo) and base sixty (uddoo) counting systems, fractions and measurement related mathematical systems are found embedded in Kafa agricultural setting. The study further found that indigenous number and number sense of Kafa people were partially integrated in school curriculum. The implication of the finding is that there is a need to improve the existing school curriculum in a way it covers indigenous number and number sense of the people in Kafa.

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Fundamental concepts of measurement

Cited by 3 publications

References 16 publications

Extended Method for Evaluation Uncertainties of Indirect Multi-Parameter Measurements and of Circuits for these Measurements. Part 2. Application on the Example of a System for Indirect Two-Parameter Measurements

Extended Method for Evaluation Uncertainties of Indirect Multi-Parameter Measurements and of Circuits for these Measurements. Part 2. Application on the Example of a System for Indirect Two-Parameter Measurements

Uncertainties of Multivariable Indirect Measurements of Dc Electrical Circuits

Ethnomathematics in Kafa, Ethiopia: Number Sense and its Level of Inclusion in School Curriculum

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