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This presentation shows transformations of slides from the traditional to the assertion-evidence design Before After.

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Presentation on theme: "This presentation shows transformations of slides from the traditional to the assertion-evidence design Before After."— Presentation transcript:

1 This presentation shows transformations of slides from the traditional to the assertion-evidence design Before After

2 [simula research laboratory] A First Step Towards Automatic Verification of PDE Code Hans Petter Langtangen Ola Skaghaug Simula Research Laboratory Oslo, Norway Before

3 [simula research laboratory] A First Step Towards Automatic Verification of PDE Code Hans Petter Langtangen Ola Skaghaug Simula Research Laboratory Oslo, Norway

4 Before

5 [simula research laboratory] This presentation shows the evolution from a manual environment to one that is automated manual somewhat manual M ATLAB Python automated Fortran 77 C++

6 Before

7 This presentation compares methods for reducing emissions of sulfur dioxide from coal power plants

8 Before

9 Converting an analog signal to a digital signal requires a sampling of the signal Accelerometer outputs an analog voltage Hardware converts analog signal to digital Computer samples a number of points Data is exported to popular applications Excel

10 [simula research laboratory] Before

11 [simula research laboratory] Although researchers give validation more attention, validation requires successful verification Validation Is the PDE model appropriate? Do we solve the right equations? Verification Are the numerical models correctly implemented? Do we solve the right equations?

12 Iron An abundant metal, makes up 5.6% of earth’s crust Properties: –shaped, sharpened, welded –strong, durable Accounts for >95% of metals used Iron ores discovered in 1844 in Michigan’s Upper Peninsula Soon found other ores in upper Wisconsin and Minnesota Kesler 1994 Iron Ore Distribution Before

13 [Kesler 1994] Iron Ore Distribution [www.star-bits.com] Iron ore Where is the largest concentration of iron ores in North America? Iron ores make up 5.6% of the earth’s crust and account for 95% of the metals used Can be shaped, sharpened, and welded Is strong and durable Iron

14 Led to 59% recallLed to 77% recall p < Students learning from the transformed slide scored higher on an identical test question [Alley et al., 2006] Q: How abundant is iron in the earth’s crust?

15 Before

16 Although the U.S. has 5% of the world's population, we use an average of 30% of all resources United States use of specific resources (percentage of worldwide use)

17 Led to 71% correctLed to 82% correct Students learning from the transformed slide scored higher on an identical test question Q: Percentage of world’s resources that the U.S. uses? p < [Alley et al., 2006]

18 Before

19 Plates move because of convection caused by heat from decay of radioactive elements in the mantle [Miller, 2004] Uranium and Thorium are large “unstable” atoms break down to produce smaller atoms, heat, and radioactivity Ocean

20 Led to 54% correctLed to 86% correct Students learning from the transformed slide scored higher on an identical test question Q: Heat source for movement of lithospheric plates? p <.001 [Alley et al., 2006]

21 Fossil Fuels: Who has what? Before

22 OPEC countries control about 75% of the world’s oil

23 Led to 63% correctLed to 81% correct p <.001 Students learning from the transformed slide scored higher on an identical test question Q: Percentage of oil that non-OPEC countries control? [Alley et al., 2006]


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