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- Johnson, Claes, et al.
(författare)
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Adaptive finite element methods for small strain elasto-plasticity
- 1992
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Ingår i: Finite Inelastic Deformations-Theory and Applications, D. Besdo, E. Steind (eds.), IUTAM Symposium Hannover, Germany 1991. ; , s. 273-288
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Konferensbidrag (refereegranskat)abstract
- We prove a posteriori error estimates for a finite element method for small strain elasto-plasticity based on Hencky's and Prandtl-Reuss' flow rules, and formulate corresponding adaptive methods. We also present the results of some numerical experiments.
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| 4. |
- Johnson, Claes, et al.
(författare)
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Adaptive finite element methods in computational mechanics
- 1992
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Ingår i: Computer Methods in Applied Mechanics and Engineering. ; 101:1-3, s. 143-181
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Tidskriftsartikel (refereegranskat)abstract
- We present a general approach to adaptivity for finite element methods and give applications to linear elasticity, non-linear elasto-plasticity and nonlinear conservation laws, including numerical results.
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| 5. |
- Johnson, Claes, et al.
(författare)
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On the convergence of shock-capturing streamline diffusion finite element methods for hyperbolic conservation laws
- 1990
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Ingår i: Mathematics of Computation. - PROVIDENCE : American Mathematical Society (AMS). - 0025-5718 .- 1088-6842. ; 54:189, s. 107-129
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Tidskriftsartikel (refereegranskat)abstract
- We extend our previous analysis of streamline diffusion finite element methods for hyperbolic systems of conservation laws to include a shock-capturing term adding artificial viscosity depending on the local absolute value of the residual of the finite element solution and the meh size. With this term present, we prove a maximum norm bound for finite element solutionsof Burgers' equation an thus complete an earlier convergence proof for this equation. We further prove, using entropy variables, that a strong limit of finite element solutions is a weak solution of the system of conservation laws and satisfies the entropy inequality asociated with the entropy variables. Results of some numerical experiments for the time-dependent compressible Euler equations in two dimensions are also reported.
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- Nygren, Else, et al.
(författare)
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Reading the medical record II. Design of a human-computer interface for basic reading of computerized medical records.
- 1992
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Ingår i: Computer Methods and Programs in Biomedicine. ; 39, s. 13-25
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Tidskriftsartikel (refereegranskat)abstract
- A user interface for reading the medical record was designed and implemented on a work-station with a 19 inch colour screen. The text is presented on imitations of paper-pages. The pages are organized in bundles which are dynamically connected to scrollable index-lists. The turning of pages on the screen is the fundamental concept of the interface. A page can be turned by a mouse-click or by a circular mouse-movement. Elaborated feedback is given to the user in order to provide effortless orientation and navigation. The interface supports the basic ways of use identified in our analyses of reading habits. It also enables human perceptual and cognitive skills to be used. It seems very easy to learn and efficient in use.
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