| 1. |
- Moon, S.J., Fournier, K.B., Scott, H., Chung, H-K, Lee, R.W.
(författare)
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Optical pumping experiments in the XUV regime.
- 2003
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Ingår i: J. Quant. Spectroscopy & Radiative Transfer. ; 81, s. 311-17.
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Tidskriftsartikel (refereegranskat)
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| 2. |
- Shepherd, R., Audebert, P., Chen, H-K, Fournier, K.B., Peyreusse, O., Moon, S., Price, D., Klein, L., Gaithier, J.C., Springer, P., Lee, R.W.
(författare)
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Satellite and opacity effects on resonance line shapes produced from short-pulse laser heated foils.
- 2003
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Ingår i: J. Quant. Spectroscopy & Radiative Transfer. ; 81
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Annan publikation (övrigt vetenskapligt/konstnärligt)
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| 3. |
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| 4. |
- Klein, G., et al.
(författare)
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Macrocognition
- 2003
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Ingår i: IEEE Intelligent Systems & Their Applications. - 1094-7167. ; 18:3, s. 81-85
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Forskningsöversikt (refereegranskat)abstract
- The importance of macrocognition in a cognitive system is discussed. Macrocognition is a term which indicates a level of description of the cognitive functions that are performed in natural decision-making settings. Macrocognition comprises the mental activities that must be successfully accomplished to perform a task or achieve a goal.
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| 5. |
- Lee, S. K., et al.
(författare)
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Electrical characterization of titanium-based ohmic contacts to 4H-Silicon carbide for high-power and high-temperature operation
- 2002
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Ingår i: Journal of the Korean Physical Society. - 0374-4884 .- 1976-8524. ; 40:4, s. 572-576
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Tidskriftsartikel (refereegranskat)abstract
- We report on titanium-based ohmic contacts (titanium carbide. titanium tungsten, and titanium) on both highly doped epilayers (n(+) and p(+)) and Al-ion-implanted layers. The TiC contact layer was epitaxially grown on epilayers as well as an Al-ion-implanted layers of 4H-SiC by co-evaporation Ti and C-60 under an ultra-high vacuum condition at low temperature (<500 degreesC). For comparison and long-term stability test, we also deposited TiW (weight ratio 30 : 710) ohmic contacts to p and n-type epilayers of 4H-SiC. The specific contact resistances (p(c)) were found to be as low as p- 5X10(-6), 2x10(-5), 2x10(-5), 3x10(-4), 4x10(-5), and 1X10(-4) Omegacm(2) for TiC contacts to n(+) epilayers, p(+) epilayers, and Al-ion-implanted layers, Ti contacts to p(+) epilayers, and TiW contacts to p(+) and to n(+) epilayers, respectively, by using linear transmission line method (TLM) measurements. During the long-term reliability tests in a vacuum chamber, we found that evaporated Au capping layers helped to keep the contacts from degrading.
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| 6. |
- Moon, K. S., et al.
(författare)
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A variational principle for adaptive approximation of ordinary differential equations
- 2003
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Ingår i: Numerische Mathematik. - : Springer Science and Business Media LLC. - 0029-599X .- 0945-3245. ; 96:1, s. 131-152
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Tidskriftsartikel (refereegranskat)abstract
- A variational principle, inspired by optimal control, yields a simple derivation of an error representation, global error = Sigma local error . weight, for general approximation of functions of solutions to ordinary differential equations. This error representation is then approximated by a sum of computable error indicators, to obtain a useful global error indicator for adaptive mesh refinements. A uniqueness formulation is provided for desirable error representations of adaptive algorithms.
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| 7. |
- Moon, K. S., et al.
(författare)
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Convergence rates for adaptive approximation of ordinary differential equations
- 2003
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Ingår i: Numerische Mathematik. - : Springer Science and Business Media LLC. - 0029-599X .- 0945-3245. ; 96:1, s. 99-129
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Tidskriftsartikel (refereegranskat)abstract
- This paper constructs an adaptive algorithm for ordinary differential equations and analyzes its asymptotic behavior as the error tolerance parameter tends to zero. An adaptive algorithm, based on the error indicators and successive subdivision of time steps, is proven to stop with the optimal number, N, of steps up to a problem independent factor defined in the algorithm. A version of the algorithm with decreasing tolerance also stops with the total number of steps, including all refinement levels, bounded by O(N). The alternative version with constant tolerance stops with O(N log N) total steps. The global error is bounded by the tolerance parameter asymptotically as the tolerance tends to zero. For a p-th order accurate method the optimal number of adaptive steps is proportional to the p-th root of the L 1/p+1 quasi-norm of the error density, while the number of uniform steps, with the same error, is proportional to the p-th root of the larger L-1-norm of the error density.
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| 8. |
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