2006 HPCMP Users Group Conference (HPCMP-UGC'06)最新文献_第2页

Quantifying Behind Armor Debris Fragments from CTH Using the Interdisciplinary Computing Environment 利用跨学科计算环境量化来自CTH的装甲碎片碎片

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.61

J. Clarke, E. Mark

引用次数: 0

ezHPC Security Architecture ezHPC安全架构

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.25

G. Moncrief, T. Townsend, S. Swillie

{"title":"ezHPC Security Architecture","authors":"G. Moncrief, T. Townsend, S. Swillie","doi":"10.1109/HPCMP-UGC.2006.25","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.25","url":null,"abstract":"High performance computing (HPC) within the Department of Defense (DoD) is vital to the execution of the research and development mission. However, users must access these resources using interfaces that are complicated, specialized, primitive, and opaque. ezHPC was developed to address this complexity. The ezHPC project is interesting in that it abstracts for the user many of the technical details and tools related to HPC within the DoD High Performance Computing Modernization Program (HPCMP) while providing a Web-based application that allows user access to HPC resources. Leveraging open-source, widely available technology, the ezHPC security model addresses the DoD security requirements for authentication, confidentiality, availability, and integrity. This paper discusses an architecture that employs end-to-end encryption, open-source technologies, message authentication codes, and authentication of users via the HP CMP-modified implementation of the Massachusetts Institute of Technology Kerberos. This architecture provides ezHPC the flexibility to reduce the technology barrier to those unfamiliar with interactive use of HPC systems while providing significant capability to more advanced users. The subsequent abstraction of HPC resources constitutes a security model for any Web-enabled application programming interface","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123069804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Virtual Prototyping of Directed Energy Weapons on Thousands of Processors 定向能武器在数千台处理器上的虚拟样机

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.76

M. Bettencourt, L. Bowers, K. Cartwright, A. Greenwood, T. Fleming, M. Haworth, N. Lockwood, P. Mardahl

引用次数: 2

Modeling Subsurface Phenomena for Tetrahedral Meshes 四面体网格的地下现象建模

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.47

B. White, O. Eslinger

引用次数: 1

Calculations of Light-Absorption Driven Molecular Rotors 光吸收驱动分子转子的计算

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.9

J. Vacek, J. Chocholousová, L. Kobr, J. Michl, J. Miller

{"title":"Calculations of Light-Absorption Driven Molecular Rotors","authors":"J. Vacek, J. Chocholousová, L. Kobr, J. Michl, J. Miller","doi":"10.1109/HPCMP-UGC.2006.9","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.9","url":null,"abstract":"We investigated the behavior of large molecular systems containing dipolar molecular rotors and motors. The computations, performed on the HPC computers, use the universal force field and Newton equations of motion implemented in our customized molecular dynamics program TINK, and commercial ab initio quantum chemical programs. The purpose of these calculations is to design new materials with controllable surface friction, materials with nonlinear response to electric fields, and other interesting properties for future devices. At 2005's conference we presented the principle of a fast unidirectional molecular rotor driven by absorption of light pulses. Now we outline results demonstrating the performance of an improved design of a synthetically accessible active motor molecule carrying a paddlewheel on a rotation axis. The structure has been optimized in a series of molecular dynamics simulations. It is designed in such a way that the absorption of a photon causes the separation of charges, and their mutual attraction then causes the rotor to make half a turn in the course of a few picoseconds. After about a dozen picoseconds after charge recombination the rotor completes a full turn. The structure has been designed in a way that favors unidirectional motion. The rates of charge separation and recombination can be controlled by a choice of donor and acceptor structures. With suitable choices, continuous irradiation or a train of light pulses would thus be expected to induce a fast unidirectional rotation of the rotor, which could be used to propel a thin layer of a fluid along a surface (\"molecular pump\") if the rotors were mounted in an organized array on a surface","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114771788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Parallelization and Automation of a Blind Deconvolution Algorithm 一种盲反卷积算法的并行化与自动化

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.57

Charles L. Matson, K. Borelli

引用次数: 5

Unsteady Naval Hydrodynamic Computations Using Lagrangian Vorticity Methods 基于拉格朗日涡量法的非定常舰船水动力计算

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.74

S. Huyer

{"title":"Unsteady Naval Hydrodynamic Computations Using Lagrangian Vorticity Methods","authors":"S. Huyer","doi":"10.1109/HPCMP-UGC.2006.74","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.74","url":null,"abstract":"A novel method to compute the 3-D unsteady hydrodynamics with application to undersea vehicles is presented. This approach solves the vorticity equation, which is derived from the momentum equation of the Navier-Stokes equations. Most problems of Navy interest involve incompressible flow, that may be described in terms of the vorticity alone. Specific geometries are represented using surface source and vortex panels whose strength is prescribed to satisfy the no-slip and no-flux boundary conditions. Vorticity is diffused from the vortex sheets onto the body surface to maintain a vorticity balance. Vorticity in the flow is specified at points and the vorticity at any other point in the field is obtained via linear interpolation. Interpolation is performed by constructing tetrahedra using Delaunay triangularization. Tetrahedra provide the control volume to integrate over to obtain the velocity and the connectivity of the control points provides a basis to construct derivatives. A sub-grid scale eddy viscosity model was implemented into the solution algorithm to model turbulent flow effects. This method was then validated for a sphere at Reynolds numbers of 1.14 million and unsteady flow development past a cone. Quality of the computed flows was compared with data obtained with experimental data. Lastly, unsteady propeller turbulent inflow computations were performed for the purpose of establishing boundary conditions for unsteady blade force computations","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123105479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of LAMMPS LAMMPS的优化

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.56

J. Fischer, V. Natoli, D. Richie

{"title":"Optimization of LAMMPS","authors":"J. Fischer, V. Natoli, D. Richie","doi":"10.1109/HPCMP-UGC.2006.56","DOIUrl":"https://doi.org/10.1109/HPCMP-UGC.2006.56","url":null,"abstract":"The Large-scale Atomic/Molecular Massively Parallel Simulator (LAMMPS) code is part of the Department of Defense High Performance Computing Modernization Program (HPCMP) technology insertion (TI) benchmarking suite of applications. As a component of the TI benchmarking applications, LAMMPS is a significant contributor to Computational Chemistry and Materials Science requirements within the DoD. Ensuring its optimal performance on HPCMP resources is a high priority. The CCM-KY5-003 User Productivity Enhancements and Technology Transfer (PET) project was created to profile and optimize LAMMPS to improve its performance and efficiency on two HPCMP assets, Eagle (Altix 3700) and JVN(Linux Cluster). Profiling efforts were completed on Eagle using the Tuning and Analysis Utilities (TAU) application in conjunction with the Performance Application Programming Interface (PAPI). The time and hardware counter data was analyzed with ParaProf and PerfExplorer, while the trace data was automatically analyzed by the Kit for Objective Judgment and Knowledge-based Detection of Performance Bottlenecks (KOJAK). The profiling effort used three different model systems, where each uses a different physical potential. Several opportunities for performance improvement were identified in the critical portions of the code, such as loop-static branching conditions, multi-dimensional C-arrays and redundant integer, and floating-point operations. In addition to algorithmic changes, compiler options and machine-specific instructions were also investigated. The performance of the code increased from 1.3x to 3.5x on Eagle and 1.2x to 1.8x on JVN depending on the physical potential employed","PeriodicalId":173959,"journal":{"name":"2006 HPCMP Users Group Conference (HPCMP-UGC'06)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123728550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

High-Fidelity Simulations for Maneuvering Unmanned Combat Air Vehicle Configurations 机动无人作战飞行器构型的高保真仿真

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.33

R. Gordnier, M. Visbal, S. Sherer

引用次数: 3

Seismic Propagation from Activity in Tunnels 隧道活动引起的地震传播

2006 HPCMP Users Group Conference (HPCMP-UGC'06) Pub Date : 2006-06-26 DOI: 10.1109/HPCMP-UGC.2006.64

S. Ketcham, J. McKenna, R. Greenfield, T. Anderson

引用次数: 2