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เนื้อหาย่อ : This edition of A First Course in the Finite Element Method has been adapted to incorporate the International System of Units (Le Systeme International d'Unites or SI) throughout the book. Le Systeme International d'Unites The United States Customary System (USCS) of units uses FPS (foot-pound-second) units (also called English or Imperial units). SI units are primarily the units of the MKS (meter-kilogram-second) system. However, CGS (centimeter-gram-second) units are often accepted as SI units, especially in textbooks. Using SI Units in this Book In this book, we have used both MKS and CGS units. USCS units or FPS units used in the US Edition of the book have been converted to SI units throughout the text and problems. However, in case of data sourced from handbooks, government standards, and product nuals, it is not only extremely difficult to convert all values to SI, it also encroache the intellectual property of the source. Some data in figures, tables, and references, therefore, remains in FPS units. For readers unfamiliar with the relationship between the FPS and the SI systems, conversion tables have been provided inside the front and back covers of the book. To solve problems that require the use of sourced data, the sourced values can be converted from FPS units to SI units just before they are to be used in a calculation. To obtain standardized quantities and manufacturers' data in SI units, the readers may contact the appropriate government agencies or authorities in their countries/regions. Instructor Resources printed Instructor's Solution Manual in SI units is available on request. An electronic version of the Instructor's Solution Manual, and PowerPoint slides of the figures from the SI text are available through www.cengage.com/engineering. The readers' feedback on this SI Edition will be highly appreciated and will help us improve subsequent editions.