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Institution

Naval Postgraduate School

EducationMonterey, California, United States
About: Naval Postgraduate School is a education organization based out in Monterey, California, United States. It is known for research contribution in the topics: Tropical cyclone & Boundary layer. The organization has 5246 authors who have published 11614 publications receiving 298300 citations. The organization is also known as: NPS & U.S. Naval Postgraduate School.


Papers
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Journal ArticleDOI
TL;DR: A prototyping approach that uses modularity and reusable components is described that enables large real-time systems to be prototyped rapidly and meets the following requirements: the prototype satisfies its requirements and is traceable to them.
Abstract: A prototyping approach that uses modularity and reusable components is described that enables large real-time systems to be prototyped rapidly. It combines a computational model tailored for real-time systems with a high-level prototyping language (the Prototype System Description Language), a systematic design method for rapid prototype construction, and an automated prototyping environment. The method meets the following requirements: the prototype satisfies its requirements and is traceable to them; the prototype is easy to modify; and the prototype code is easy to read and analyze. >

73 citations

Journal ArticleDOI
TL;DR: In this paper, the results of an established parabolic equation model based on the split-step Fourier algorithm are presented for a simple isospeed water column over a flat bottom with geo-acoustic parameter variations.
Abstract: The Shallow Water Acoustic Modeling (SWAM'99) Workshop was organized to examine the ability of various acoustic propagation models to accurately predict sound transmission in a variety of shallow water environments designed with realistic perturbations. In order to quantify this, tests of reciprocity, convergence, and stability must be considered. This paper presents the results of an established parabolic equation model based on the split-step Fourier algorithm. The test cases examined in this paper include a simple isospeed water column over a flat bottom with geoacoustic parameter variations, a randomly sloping bottom with geoacoustic parameter variations, and a canonical shallow water profile perturbed by internal waves over a flat, homogeneous bottom. Source configurations were generally held constant but numerous single frequency and broadband runs were performed. Model testing is emphasized with specific criteria for accurate solutions being specified. Random perturbations are added to one test case to examine the influence of environmental uncertainty on the details of the propagation. The results indicate that point-wise accurate solutions to the acoustic field in shallow water cannot be achieved beyond a few kilometers. This is partly due to the inaccuracies of the split-step Fourier algorithm employed in these shallow water scenarios and the treatment of the bottom interface boundary conditions, but also due to the inherent variability caused by uncertain environmental specification. Thus, more general features of the acoustic field should be emphasized at longer ranges.

73 citations

Journal ArticleDOI
TL;DR: State capacity is a core concept in political science research and it is widely recognized that state institutions exert considerable influence on outcomes such as economic development, civil conf... as discussed by the authors, and economic development.
Abstract: State capacity is a core concept in political science research, and it is widely recognized that state institutions exert considerable influence on outcomes such as economic development, civil conf...

73 citations

Proceedings ArticleDOI
01 Dec 2002
TL;DR: This paper proposes an extension to basic event graphs that enables small models to be encapsulated in reusable modules called listener event graph objects (LEGOs), linked together using a design pattern from object oriented programming called the "listener pattern" to produce new modules of even greater complexity.
Abstract: Event graphs are a simple and elegant language-independent way of representing a discrete event simulation (DES) model. In this paper we propose an extension to basic event graphs that enables small models to be encapsulated in reusable modules called listener event graph objects (LEGOs). These modules are linked together using a design pattern from object oriented programming called the "listener pattern" to produce new modules of even greater complexity. The modules generated in this way can themselves be linked and encapsulated, forming a hierarchical design which is highly scalable. These concepts have been implemented in Simkit, a freely available simulation package implemented in Java.

73 citations

Journal ArticleDOI
TL;DR: A new generation, parallel adaptive-mesh mantle convection code, Rhea, is described and benchmarked, demonstrating scalability to 122 880 compute cores and verifying correctness of the implementation.
Abstract: SUMMARY A new generation, parallel adaptive-mesh mantle convection code, Rhea, is described and benchmarked. Rhea targets large-scale mantle convection simulations on parallel computers, andthushasbeendevelopedwithastrongfocusoncomputationalefficiencyandparallelscalabilityofbothmeshhandlingandnumericalsolvers.Rheabuildsmantleconvectionsolversona collection ofparallel octree-based adaptivefiniteelement librariesthatsupport new distributed data structures and parallel algorithms for dynamic coarsening, refinement, rebalancing and repartitioning of the mesh. In this study we demonstrate scalability to 122 880 compute cores and verify correctness of the implementation. We present the numerical approximation and convergence properties using 3-D benchmark problems and other tests for variable-viscosity Stokes flow and thermal convection.

73 citations


Authors

Showing all 5313 results

NameH-indexPapersCitations
Mingwei Chen10853651351
O. C. Zienkiewicz10745571204
Richard P. Bagozzi104347103667
Denise M. Rousseau8421850176
John Walsh8175625364
Ming C. Lin7637023466
Steven J. Ghan7520725650
Hui Zhang7520027206
Clare E. Collins7156021443
Christopher W. Fairall7129319756
Michael T. Montgomery6825814231
Tim Li6738316370
Thomas M. Antonsen6588817583
Nadia Magnenat-Thalmann6552114850
Johnny C. L. Chan6126114886
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202331
2022151
2021321
2020382
2019352
2018362