02-numbers[1] - ENG 1D04 Fall 2010 02 Numbers Dr. William...

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Unformatted text preview: ENG 1D04 Fall 2010 02 Numbers Dr. William M. Farmer and Dr. Spencer Smith Faculty of Engineering, McMaster University 23 September 2010 Outline 1. Administrative details. 2. Review. 3. Ariane 5. 4. Numbers. 5. Modules in Python. 6. Demo. 7. Advice. 8. Work plan for next week. W. M. Farmer and S. Smith ENG 1D04 Fall 2010: 02 Numbers 2/18 Administrative Details 1. Use normal mail, not Avenue mail, for this course. 2. Please carefully read the Instructor’s Announcements under the Course Management discussion topic on Avenue. W. M. Farmer and S. Smith ENG 1D04 Fall 2010: 02 Numbers 3/18 Review 1. Values and types. 2. Expressions and statements. 3. Variables and constants. 4. Assignment statements. 5. Modes of program execution. 6. Software development process. W. M. Farmer and S. Smith ENG 1D04 Fall 2010: 02 Numbers 4/18 Case Study: Ariane 5 The Ariane 5 is a launch vehicle used by the European Space Agency. I Its development took 10 years and cost $7 billion (Wikipedia). The European Ariane 5 rocket exploded on its first test flight in 1996. I $500 million loss in rocket and cargo value. The failure was due to a software error: a 64-bit floating point number was converted to a 16-bit machine integer. I The module that did the conversion was written for the Ariane 4 but reused for the Ariane 5 without re-analysis. Shows that engineers must have a detailed understanding how numbers are represented (Themes 1 and 2). W. M. Farmer and S. Smith ENG 1D04 Fall 2010: 02 Numbers 5/18 Number Systems The idea of a number is one of the strongest and most important threads in the history of mathematics....
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This note was uploaded on 12/14/2010 for the course ENGINEERIN 1d04 taught by Professor Smith during the Spring '10 term at McMaster University.

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02-numbers[1] - ENG 1D04 Fall 2010 02 Numbers Dr. William...

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