By L. Kirkup, R. B. Frenkel
Dimension shapes medical theories, characterises advancements in production procedures and promotes effective trade. In live performance with size is uncertainty, and scholars in technological know-how and engineering have to establish and quantify uncertainties within the measurements they make. This e-book introduces size and uncertainty to moment and 3rd 12 months scholars of technological know-how and engineering. Its strategy will depend on the across the world recognized and suggested instructions for calculating and expressing uncertainty (known by means of the acronym GUM). The data underpinning the equipment are thought of and labored examples and routines are unfold in the course of the textual content. certain case reports in accordance with normal undergraduate experiments are incorporated to enhance the foundations defined within the ebook. This consultant is usually necessary to pros in who're anticipated to understand the modern equipment during this more and more vital quarter. extra on-line assets can be found to aid the ebook at www.cambridge.org/9780521605793.
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Extra info for An introduction to uncertainty in measurement using the GUM
Chieh (1990), ‘Operation of NIST Josephson array voltage standards’, Journal of Research of the National Institute of Science and Technology, 95, 219–235. B. Jeckelmann and B. Jeanneret (2001), ‘The quantum Hall effect as an electrical resistance standard’, Reports on Progress in Physics, 64, 1389–1441. I. K. c. Josephson effect emf standard using a superconducting current comparator’, Metrologia, 12, 47–54. 2) T. J. Quinn and J. E. Martin (1985), ‘A radiometric determination of the Stefan–Boltzmann constant and thermodynamic temperatures between −40 ◦ C and +100 ◦ C’, Philosophical Transactions of the Royal Society, 316, 85–181.
2 shows a very stable standard of electrical resistance: a 4 The position of a pointer on a dial may be regarded as an ‘analogue’ display, in contrast to a digital display, which is usually more accurate. When quickness of reading is more important than accuracy, analogue displays are preferred. This is why vehicle speedometers are usually analogue displays. 1 Measurement and related terms 31 1- standard artefact, with low temperature coefﬁcient of resistance, which was designed and manufactured at the National Measurement Institute of Australia (Pritchard 1997).
1) and is kept at the National Measurement Institute of Australia in Sydney. All other SI base units are deﬁned through constants of nature, so that any wellequipped NMI in the world can realise the base unit. For example, the realisation of the metre is accomplished using a laser whose light has a precise frequency, f , that 2 3 The kilogram may eventually be deﬁned in terms of natural constants. One method would be to deﬁne it as the mass of a speciﬁed number of atoms of a particular isotope of an element.
An introduction to uncertainty in measurement using the GUM by L. Kirkup, R. B. Frenkel