Planning and Executing Credible Experiments. Robert J. Moffat
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Название: Planning and Executing Credible Experiments
Автор: Robert J. Moffat
Издательство: John Wiley & Sons Limited
Жанр: Физика
isbn: 9781119532866
isbn:
Uncertainty analysis is an essential element in experiment planning, before and during execution. Uncertainty analysis is a tool by which we can identify the significance of small changes in the output. If the observed difference is larger than the derived uncertainty, this is evidence that the process being studied is not well modeled by the equations used – in other words, something is going on that we don't know about. Chapters 10 and 11 are devoted to uncertainty analysis.
Experimentally, we never know we are “right.” An essential element to a credible experiment is acknowledging that the best we can ever say is, “We have no evidence or suspicion that we are wrong.”
Reporting the uncertainty of every reported value is essential for others to believe our science.
References
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Homework
1 2.1 Prepare a lab computer for dual boot: Windows and the Linux operating system. Or …
2 2.2 Prepare a dedicated lab computer for the Linux operating system. Or Exercise 2.1.
3 2.3 Following the guide in Appendix D3, download and install Gosset, public domain, open source, and free. Please consider this software tool essential.
Notes
1 1 This quotation is from a Feynman lecture at Cornell in 1964. A select portion of the lecture can be viewed at https://youtu.be/OL6‐x0modwY. A lengthier quote is given in Pomeroy (2012).
2 2 Rather than divide a complex number into real and imaginary parts, shall we describe it as revealed and concealed parts? Our reasoning is that both parts of a complex number have reality in our universe. For example, in dynamic systems, the revealed part corresponds to position and the concealed part corresponds to velocity. Is velocity just as real as location? Of course. We, you and us, can see the location of a car relative to its surroundings. The speed (scalar) is revealed to us via the speedometer. The change of velocity is revealed to us via our inner ear. For deeper insight, Roger Penrose has provided a most compelling motivation for complex numbers in his book Road to Reality (2005, chapters 1 through 14).
3 3 The superiority of the cooking profile trajectory is such that I (RH) witnessed a 50-person block of Asian tourists who each traveled to Japan primarily to buy a rice cooker to bring home to their country. There was insufficient room in the overhead compartments for all the rice cookers, so the flight departure was delayed 40 minutes as all the cookers were relocated to the checked-baggage compartment.
4 4 Dr. Loyd Withrow, GM Research Labs, ca. 1953. Personal communication.
5 5 Thank you to Dr. Ioannidis for permission to include the lists from his articles.
6 6 Penrose trained Stephen Hawking; together they wrote a number СКАЧАТЬ