Despite its ease of use, OpenMP has failed to gain widespread use on large scale systems, largely due to its failure to deliver sufficient performance. Our experience indicates that the cost of initiating OpenMP regions is simply too high for the desired OpenMP usage scenario of many applications. In this paper, we introduce CLOMP, a ...

Despite its ease of use, OpenMP has failed to gain widespread use on large scale systems, largely due to its failure to deliver sufficient performance. Our experience indicates that the cost of initiating OpenMP regions is simply too high for the desired OpenMP usage scenario of many applications. In this paper, we introduce CLOMP, a ...

. The random access assures that threads will touch different memory pages on every memory access and different RECHERCHE EN INFORMATIQUE ET EN AUTOMATIQUE Memory Access Characterization of OpenMP Workloads on a Multi -- T�l�copie +33 4 76 61 52 52 Memory Access Characterization of OpenMP Workloads on a ...

A mathematical model for the simulation of three-dimensional bursting phenomena and its parallel implementation are presented. The model consists of four nonlinearly coupled partial differential equations that include fast and slow variables, and exhibits bursting in the absence of diffusion. The differential equations have been discretized by means of a second-order accurate ...

Basics of OpenMP, and instructions how to compile and run. Description of functions, parallel directives and regions, locks, and schedules.

OpenMP is an important API for shared memory programming, combining shared memory's potential for performance with a simple programming interface. Unfortunately, OpenMP lacks a critical tool for demonstrating whether programs are correct: a formal memory ...

The concepts of programming with a shared memory model and OpenMP. directives are outlined in section 2. Detailed implementations of directive-based NPBs ...

Apr 23, 2009 ... Platform/Chipset; Processor; Memory; Interconnect ..... enables the user to compile OpenMP programs in sequential mode; OpenMP directives ...

... Title : Evaluating Performance of OpenMP and MPI on the SGI Origin 2000 With Benchmarks of Realistic Problem Sizes. ...

The memory model of OpenMP has been widely misunderstood since the first OpenMP specification was published in 1997 (Fortran 1.0). The proposed OpenMP specification (version 2.5) includes a memory model section to address this issue. This section unifies ...

The memory model of OpenMP has been widely misunderstood since the first OpenMP specification was published in 1997 (Fortran 1.0). The proposed OpenMP specification (version 2.5) includes a memory model section to address this issue. This section unifies and clarifies the text about the use of memory in all previous specifications, and ...

SUMMARY: A top scoring pair (TSP) classifier consists of a pair of variables whose relative ordering can be used for accurately predicting the class label of a sample. This classification rule has the advantage of being easily interpretable and more robust against technical variations in data, as those due to different microarray platforms. Here we describe a parallel ...

... Accession Number : ADA529953. Title : A More Accurate Characterization of UH-60A Pitch Link Loads Using Neural Networks. ...

OpenMP lacks essential features for developing mission-critical software. In particular, it has no support for detecting and handling errors or even a concept of them. In this paper, the OpenMP Error Model Subcommittee reports on solutions under consideration for this major omission. We identify issues with the current OpenMP ...

OpenMP is a widely adopted standard for threading directives across compiler implementations. The standard is very successful since it provides application writers with a simple, portable programming model for introducing shared memory parallelism into their codes. However, the standards do not address key issues for supporting that programming model in development tools such ...

major features of OpenMP, including its various constructs and directives for specifying parallel regions, work sharing, synchronization and data environment. Runtime library functions and environment variables are also covered. This tutorial includes both C and Fortran example codes and a lab exercise.

... nodes; nodes_used; npb-openmp_3.0; ntr; ntr1; openmp; openmpi; palm; passcode ... aspratt Novice; Eve-Marie Devaliere Novice; Carlos Cruz SIVO Support ...

... Preliminary data characterizing steroids of the chimpanzee indicate similarity both ... which will give accurate secretion rates of steroid hormones such ...

.1 An Introduction Into OpenMP Copyright�2005 Sun Microsystems IWOMP 2005 Directive format Fortran: directives1 RvdP/V1.1 An Introduction Into OpenMP Copyright�2005 Sun Microsystems IWOMP 2005 An Introduction Into OpenMP Ruud van der Pas Senior Staff Engineer Scalable Systems Group Sun Microsystems IWOMP 2005

Introduction to distributed and shared memory architectures. Programming review and combination of OpenMP and MPI. Multilevel parallelism and performance.

With the advent of parallel hardware and software technologies users are faced with the challenge to

Oct 16, 2006 ... The thermochemistry of the volatilization reactions is not well characterized, preventing accurate understanding and prediction of the ...

One of the primary challenges in this quest is the accurate characterization of phytoplankton physiological variability. Recognition of this limitation was ...

.13% performance improvement for the GTC. Our results also indicate that the OpenMP performance can be improved to analyze and optimize the performance of the OpenMP programs. Our experimental results indicate that, using multiplications, and up to 10.13% performance improvement for the GTC. Our results also indicate that the Open

proper include file mpif.h (32 bit / 64 bit) 2 communication protocols over switch: IP and US (user space: 2.8 MB for IP and 64 MB for US many more #12;Parallel Programming with OpenMP and MPI on AIX 21 poe Programming with OpenMP and MPI on AIX 23 MPI Trace IBM Tools provided as part of HPC Toolkit (ACTC US

In this paper we describe the parallelization of the multi-zone code versions of the NAS Parallel Benchmarks employing multi-level OpenMP parallelism. For our study we use the NanosCompiler, which supports nesting of OpenMP directives and provides clauses...

(requires dyninst or DPCL) � GuideView (OpenMP) (being phased out) � Vampir (MPI) � TAU (OpenMP, MPI, MPI but no OpenMP -WGprof � Activates profiling for Vampir and GuideView; implies �WGstats -WGprof_leafprune= � Sets the minimum size of procedures to retain in Vampir or GuideView profiles to lines � Use

We present a software library for numerically estimating first and second order partial derivatives of a function by finite differencing. Various truncation schemes are offered resulting in corresponding formulas that are accurate to order O(h), O(h), and O(h), h being the differencing step. The derivatives are calculated via forward, backward and central differences. Care has ...

Transactional Memory (TM) has received significant attention recently as a mechanism to reduce the complexity of shared memory programming. We explore the potential of TM to improve OpenMP applications. We combine a software TM (STM) system to support transactions with an OpenMP implementation to start thread teams and provide task and loop-level ...

OpenMP [2] is an important API for shared memory programming, combining shared memory's potential for performance with a simple programming interface. Unfortunately, OpenMP lacks a critical tool for demonstrating whether programs are correct: a formal memory model. Instead, the current official definition of the OpenMP memory ...

OpenMP [1] is an important API for shared memory programming, combining shared memory's potential for performance with a simple programming interface. Unfortunately, OpenMP lacks a critical tool for demonstrating whether programs are correct: a formal memory model. Instead, the current official definition of the OpenMP memory ...

OpenMP is a popular and evolving programming model for shared-memory platforms. It relies on compilers for optimal performance and to target modern hardware architectures. A variety of extensible and robust research compilers are key to OpenMP's sustainable success in the future. In this paper, we present our efforts to build an OpenMP 3.0 ...

We describe a newly developed hydrodynamic code for studying accretion disk processes. The numerical method uses a finite volume, non-linear, Total Variation Diminishing (TVD) scheme to capture shocks and control spurious oscillations. It is second-order accurate in time and space and makes use of a FARGO-type algorithm to alleviate Courant Friedrichs Lewy time step ...

Accurate predictions of wave heights, currents, and water elevations are vital inputs in the planning of military operations in the marine environment. Marine circulation and wind-wave models have traditionally been run separately, but recent research has identified potentially important interactions between current and wave motions. This report details the coupling of the ...

Rapid and accurate threat assessment and characterization are key elements in the quest for space superiority. These often depend on rapid orbit determination, accurate orbit propagation and object characterization. Threat scenarios involving new launches...

Efficient exploitation of these resources requires accurate characterization of mineral abundances, sizes/shapes, and association of 'ore' and 'gangue' ...

... determine the temperature dependence of the energy gap of various ... defects and accurately determine their activation energies, thus providing ...

... ELASTIC-PLASTIC MATERIAL ... This behavior was accurately described using an orthotropic elastic- plastic constitutive model. ...

resistance, since a good ohmic contact is desirable for accurate device characterization measurements. As the device grows in size, sheet resistance losses ...

To accurately characterize changes it is vitally important that the uncertainties in the estimates of the quantities being observed are known, ...

Instrument calibration enables accurate characterization of performance to enable collection and extraction of precise scientific measurements. The calibration ...

... accurately quantified by using observation wells. Determining the pressure gradients produced between groundwater and surface water by the ... ...

... and accurate functional test of complex devices. This testing criteria termed 'Logic Integrity Tests' is described and is proposed for inclusion in MIL ...

phenomena through different means, such as ground sensor or a radar are expected to enable better comprehension and more accurate characterization of ...

... Abstract : Assessing the risk of impact to natural ecosystems from xenobiotic compounds requires an accurate characterization of the threatened ...

It is shown that the albedo values predicted by the mixture model are accurate to within 2% of the corresponding measured values. ...

large truss structure to generate an accurate structural model. ... perturbation are calculated and assembled as columns of S where npgap refers to the ...

Performance models require an accurate workload characterization. ... Evaluation of radiation effects against C6 glioma in combination with vaccinia ...

times requires an accurate knowledge of the molecular phrenology, characterized by Pd; such information is not generally available. ...

OpenMP [13] is the dominant programming model for shared-memory parallelism in C, C++ and Fortran due to its easy-to-use directive-based style, portability and broad support by compiler vendors. Similar characteristics are needed for a programming model for devices such as GPUs and DSPs that are gaining popularity to accelerate compute-intensive application regions. This paper ...

. (PLDI '98), pp. 212�223 (1998) 4. Intel Corp.: Intel Cilk++ SDK. http://software.intel.com/en-us/articles/intel are compared for OpenMP 3.0, Cilk, Cilk++, Intel Thread Building Blocks, as well as an OpenMP implementation of the UTS bench- mark on several different OpenMP 3.0 compiler and run time implementations (Intel icc 11

In this paper we describe a C++ infrastructure for source-to-source translation. We demonstrate the translation of a serial program with high-level abstractions to a lower-level parallel program in two separate phases. In the first phase OpenMP directives are introduced, driven by the semantics of high-level abstractions. Then the OpenMP directives are ...

There are at present no objective methods available to medical personnel to quantitatively characterize the depth of burns or to accurately estimate the time required for healing. This information is crucial in the early stages of burn care since it deter...

Several physicochemical analyses are being performed to better characterize the Devonian gas shales located in the Appalachian and Illinois Basins. The results of these analyses are being integrated with the geochemical analyses to present an accurate cha...

lap splice joint panel by characterizing the fracture surface marker bands. This accurate characterization of WFD is required before damage tolerant ...

... Memory requirements for NCODA ... print -n " Checking initial model error file ... function setup_processors { # # Set OpenMP environment # Set number ...

Widening Accessibility to Efficient and Scalable. Tool Generated OpenMP Code ... As a result, the tools may not provide increased accessibility to ...

Jul 21, 2010 ... Use a specific memory model: -mcmodel=medium and -shared-intel ... -openmp handles OMP directives and -parallel looks for loops to ...

Abstract. This paper presents a tool setup for comprehensive eventbased performance analysis of large-scale openmp and hybrid openmp/ mpi applications. The kojak framework is used for portable code instrumentation and automatic analysis while the new Vampir NG infrastructure serves as generic visualization engine for both openmp and ...

... report describes implementation of the QUODDY finite-element circulation model on shared-memory multiprocessor computers using OpenMP. ...

Jun 29, 2010 ... For some serial uses of the model, this memory overhead is prohibitive, ..... 5 scientific configurations of the model for serial, OpenMP, ...

OurOcean Home � Data Products � Models � On Demand Model ... ROMS can be run on both shared-memory (OpenMP) and distributed memory (MPI) machines. ...

Oct 24, 2005 ... The ocean model is based on the Regional Ocean Modeling System (ROMS), ... ROMS can be run on both shared-memory (OpenMP) and distributed ...

Aug 26, 2003 ... The ocean model is based on the Regional Ocean Modeling System (ROMS), ... ROMS can be run on both shared-memory (OpenMP) and distributed ...

... of the code such as the Drude plasma model. ... The use of OpenMP makes it possible to utilize ... share a single system image through shared memory. ...

Research Center to the Goddard Cumulus Ensemble (GCE) cloud modeling code. We ... The OpenMP code ran on different types of shared-memory parallel machines, ...

flow Any text book on numerical solution of partial differential equations Topic 4 & 5 � http://www.openmp.org/drupal

components of the cluster, the network, and the available software. ... On an SMP cluster the message passing programming paradigm can be employed within ...

... more independent from a model's particular gridding ... OpenMP paradigms, and is now suitable for both shared and distributed memory machines ...

, and Characterization 59 described by Bevington 95]. In essence, the uncertainty of a t parameter is found by varying systematic errors, further complicating the characterization procedure. If such uncertainty is present be accurately characterized when the diameter exceeds 0.8 cm. Recall that the uncertainty in ...

Diakhat�, Samuel Thibault, Olivier Aumage, Raymond Namyst, and Pierre-Andr� Wacrenier INRIA Futurs - La, and Paul Petersen. Compiler support of the workqueuing execution model for intel smp architectures. In European Workshop on OpenMP (EWOMP), October 2004. [TBG+07] Samuel Thibault, Fran�ois Broquedis, Brice

This workshop presents an introduction to parallel programming with OpenMP, task and data parallelism. It also presents the IBM Cell BE architecture and programming with OpenMP and StarSS. Additional topics include parallel programming with Unified Parallel C (UPC), CUDA, OpenCL, and Himeno benchmark on GPU cluster.

--347, Ann Arbor, Michigan, June 5--7, 1984. [29] John D. Valois. Lock�free linked lists using compare) a unique spin lock algorithm for shared memory syn� chronization based on in�memory atomic instructions that are closer to the processor/thread units where they are used; (2) a unique spin lock algorithm designed

Seismic monitoring requires accurate source characterization in real time. Accurate 3D earth models are essential for accurate predictions of seismic observables and source characterization. While recovering the true earth structure has always been the go...

The flammable gas watch-list (FGWL) tanks, which have demonstrated a gas release event (GRE) exceeding 0.625% hydrogen by volume will require additional characterization. The purpose of this additional characterization is to accurately measure the flammab...

Cluster computing has emerged as a defacto standard in parallel computing over the last decade. Now, researchers have begun to use clustered, shared-memory multiprocessors (SMPs) to attack some of the largest and most complex scientific calculations in the world today [2, 1], running them on the world's largest machines including the US DOE ASCI platforms: Red, Blue Mountain, Blue ...

JPL has developed highly accurate 3-D vector scattering codes used to explore aerosol properties based on the combined finite-elements integral-equation technique (FE-IE), an approach established a decade ago and which made JPL a leading institution in advanced supercomputer applications for electromagnetic scattering. Airborne aerosols are known to play an important role in ...

Accurate measurement of moisture content is a prime requirement in hydrological, geophysical, and biogeochemical research as well as for material characterization and process control. Within these areas, accurate measurements of the surface area and bound water content is becoming increasingly impor...

This paper discusses the importance of the proper characterization of scattering and attenuation in trees needed for accurate retrieval of soil moisture in the presence of trees. Emphasis is placed on determining an accurate estimation of the propagation properties of a vegetation canopy using the c...

Accurate measurement of moisture content is a prime requirement in hydrological, geophysical, and biogeochemical research, as well as for material characterization and process control. Within these areas, accurate measurements of the surface area and bound water content are becoming increasingly imp...

Accurate estimation of snow mass is important for the characterization of the hydrological cycle at different space and time scales. For effective water resources management, accurate estimation of snow storage is needed. Conventional snow gauges measure ...

Several physicochemical analyses are being performed to better characterize the Devonian gas shales located in the Appalachian and Illinois Basins. The results of these analyses are being integrated with the geochemical analyses to present an accurate characterization of the Devonian shales and to accurately assess ...

Several physicochemical analyses are being performed to better characterize the Devonian gas shales located in the Appalachian and Illinois Basins. The results of these analyses are being integrated with the geochemical analyses to present an accurate characterization of the Devonian shales and to accurately assess ...

Automatic parallelization of sequential applications using OpenMP as a target has been attracting significant attention recently because of the popularity of multicore processors and the simplicity of using OpenMP to express parallelism for shared-memory systems. However, most previous research has only focused on C and Fortran applications operating on ...

... 14. ABSTRACT The mission of the Air Force Technical Applications Center (AFTAC) requires accurate yield estimation for nuclear explosions. ...

The Solar Wind Plasma Experiment on Ulysses is accurately characterizing the bulk ... from a set of seven apertures on a disk driven by a stepping motor. ...

systems and custom software for accurate standardized PV measurements. This includes algorithms developed by the group over the years for calculating I-V characteristics and, for...

Aug 4, 2004... can now be used to accurately characterize gene functions in Saccharomyces cerevisiae, commonly known as baker's yeast. ...

The impedance of the supconducting hot-electron bolometer mixer was measured in the range 0.2-4 GHz.

... accurate 3D model of a 2080/SiC/20p aluminum composite containing 14 SiC ... [29], is used to quantify the spatial homogeneity of the different DRA ...

An accurate analysis of aluminum alloys is required for quality control and characterization purposes. The two analytical techniques atomic absorption spectroscopy and inductively coupled plasma atomic emission spectroscopy are used for the the determinat...

Pulse-echo ultrasonic testing is an important method for nondestructive inspection of materials and for detecting and characterizing defects. There is still a need for the development of robust and accurate inversion algorithms, especially for the case of...

agents either singly or in various combinations every day through air, drinking water, food, and dust. In order to accurately characterize risk from and appropriately regulate...

The research undertaken in this project has been directed toward the area of attoscience, in particular the problem of attosecond metrology. That is, the accurate determination of the electric field of attosecond XUV radiation. This outstanding problem ha...

... of applications require accurate detection and characterization of persons, human measurement and signature intelligence (H-MASINT), and SAR ...

... to develop advanced methods and apparatus for an accurate quantitative in-service identification and characterization of wire rope defects using ...

device. A well-characterized soil starting material will be spiked to cover the complete boiling point range for VOCs and semivolatiles as identified in the attachment. Samples...

... U lalance equations. fracking the electron energies allow., for a more accurate characterization of both hot ,lfctrotn effects and substrate currents. ...

Assessing the risk of impact to natural ecosystems from xenobiotic compounds requires an accurate characterization of the threatened ecosystem, direct measures or estimates of environmental exposure, and a comprehensive evaluation of the biological effect...

Sep 16, 2010 ... A software tool that will allow for accurate assessment of the change in residual stress and cold working of disks providing a predictive ...

Biomass Compositional Analysis Laboratory Providing detailed and accurate characterization of the chemical composition of biomass feedstocks, intermediates, and products NREL is a...

... Leonel P. Gonzalez and Shekhar Guha Survivability ... Leonel P. Gonzalez a , Srinivasan Krishnamurthy b and Shekhar Guha a a ...

Uncertainty is the parameter which characterizes the variance of value obtained with respect to the reasonable measurement values in resulting measurements. To accurately report the instrumentation results, it is necessary to show the measurement values a...

programming and to accurately characterize the big-bang property of an optimal command .... by the duality theory, it admits an optimal extreme point solution. ...

The same techniques can be adapted for characterizing chlorophyll uncertainty ( or more accurately called discrepency) for empirical algorithms. ...

Abstract: Our objectives are threefold: (1) to accurately characterize optical data storage films by MeV ion-beam analysis (IBA) for ODSC collaborators; ...

CAI.IBRATION SYSTEM REQUIREhlENTS. The performance of a DSN antenna must be accurately characterized at the time it comes on line as a new ...

OpenMP provides a portable programming interface for shared memory parallel computers (SMPs). Although this interface has proven successful for small SMPs, it requires greater flexibility in light of the steadily growing size of individual SMPs and the recent advent of multithreaded chips. In this paper, we describe two application development experiences that exposed these ...

A program analysis tool can play an important role in helping users understand and improve OpenMP codes. Array privatization is one of the most effective ways to improve the performance and scalability of OpenMP programs. In this paper we present an extension to the Open64 compiler and the Dragon tool, a program analysis tool built on top of this compiler, ...

A method for characterizing a liquid crystal display (LCD) was developed using a characterized digital still camera (DSC). Prediction accuracy of the method was evaluated through calculating the Euclidean distance between prediction and the corresponding reference in the most lately standardized color appearance model CIECAM02 with rescaled lightness. This ...

Satellite remote sensing images can be interpreted to provide important information of large-scale natural resources, such as lands, oceans, mountains, rivers, forests and minerals for Earth observations. Recent advances of remote sensing technologies have improved the availability of satellite imagery in a wide range of applications including high dimensional remote sensing data sets (e.g. high ...

Accurate characterization of the incident neutron spectrum is an important requirement for precise Rietveld analysis of time-of-flight powder neutron diffraction data. Without an accurate incident spectrum the calculated model for the measured relative intensities of individual Bragg reflections will possess systematic errors. We ...

of Ground-Penetrating Radar for Accurate Characterization of Subsurface Electric Properties S�bastien Lambot--The possibility to estimate accurately the subsurface electric properties from ground-penetrating radar (GPR scatterers. Index Terms--Frequency domain, ground-penetrating radar (GPR), inverse modeling, linear systems

The main peak in the autocorrelation function of bar codes is here utilized as the signal of accurate alignment. Attention is therefore directed to the problem of how to increase the contrast of the main autocorrelation peak above the remaining part of the correlation signal and to the problem concerned with the upper limit that the contrast may attain. To meet different ...

A number of pattern recognition techniques have been used to determine compact physiological and biochemical indices which quantitatively characterized post-traumatic states. These indices frequently characterize the patient more accurately than physician...

AND CONSOLIDATION OF BORDER FREIGHT TRANSPORTATION DATA FOR PLANNING APPLICATIONS AND CHARACTERIZATION OF NAFTA Freight Transportation Data for Planning Applications and Characterization of NAFTA Truck Loads for Aiding of the implementation of the North American Free Trade Agreement (NAFTA). Accurate information on truck volumes

DATA FOR PLANNING APPLICATIONS AND CHARACTERIZATION OF NAFTA TRUCK LOADS FOR AIDING IN TRANSPORTATION Agreement (NAFTA). Accurate information on truck volumes and truck characteristics is critical OF BORDER FREIGHT TRANSPORTATION DATA FOR PLANNING APPLICATIONS AND CHARACTERIZATION OF NAFTA TRUCK LOADS

Millimeter and sub-millimeter wave three-dimensional open dielectric structures are characterized using the Finite Difference Time Domain (FDTD) technique. The use of FDTD method allows for the accurate characterization of these components over a very wid...

The technique for inspection and characterization of solid wastes with a low or very low alpha activity and medium beta or gamma activity allows ANDRA, the collecting authority, an accurate, but not perfect, knowledge of the wastes and to limit the risk o...

Optical waveguides of GaAlAs were experimentally investigated using the grating coupler. A convenient measurement to reference input-coupling angles to the normal is described. This referencing capability enables the accurate characterization of a single ...

Uniform delivery of dry material for stable concentrations of aerosols in inhalation exposure chambers is essential in inhalation experiments. The paper characterizes an AccuRate dry material feeder with modifications, for different helix sizes, actuation...

Uniform delivery of dry material for stable concentrations of aerosols in inhalation exposure chambers is essential in inhalation experiments. his paper characterizes an AccuRate dry material feeder with modifications, for different helix sizes, actuation rates, nozzle types and ...

A high-throughput assay for characterizing a subject's genetic makeup is disclosed. Specifically, a high-throughput assay utilizing PCR is disclosed that permits the rapid and accurate characterization of a subject's inherited alleles of the polymorphic g...

Accurate description of transport pathways on the gross scale, the location of contamination, and characterization of heterogeneity within the vadose zone, are now realized as vital for proper treatment, confinement and stabilization of subsurface contami...

Accurate description of transport pathways on the gross scale, the location of contamination, and characterization of heterogeneity within the vadose zone, are now realized as vital for proper treatment, confinement and stabilization of subsurface contami...

Accurate description of transport pathways on the gross scale, the location of contamination, and characterization of heterogeneity within the vadose zone, are now realized as vital for proper treatment, confinement and stabilization of subsurface contamination at Department of E...

Accurate description of transport pathways on the gross scale, the location of contamination, and characterization of heterogeneity within the vadose zone, are now realized as vital for proper treatment, confinement and stabilization of subsurface contamination at DOE waste sites...

The Emissions Characterization and Prevention Branch (ECPB)is part of the National Risk Management Research Laboratory's Air Pollution Prevention and Control Division. The Branch's mission is to research and develop new and more accurate methods for estimating emissions from sour...

Great strides have been made in the ability to model and predict oceanography (temperature, salinity, currents, etc.) accurately and in a timely manner. There exists a need to characterize the variability of the ocean based on its acoustic propagation cha...

Thomson scattering has been developed at the Nova laser facility as a direct and accurate diagnostic to characterize inertial confinement fusion plasmas. Measurements from methane-filled, ignition relevant hohlraums apply the theory for two ion species pl...

The Rai and Van Ryzin dose-response model (1) proposed for teratology experiments has been characterized for its appropriateness and applicability in modeling developmental toxicity data. odifications were made in the initial probability statements to reflect more accurately biol...

The objectives of this research were (1) to develop an accurate and sensitive method of analysis for nitroguanidine alone and in the presence of other explosives, (2) to characterize the products resulting from the chemical degradation of nitroguanidine a...

Accurate description of transport pathways on the gross scale, the location of contamination, and characterization of heterogeneity within the vadose zone, are now realized as vital for proper treatment, confinement and stabilization of subsurface contamination at Department of E...

Too frequently, researchers rely on incomplete site characterization data to determine the placement of the sampling wells. They forget that it is these sampling wells that will be used to evaluate the effectiveness of their research efforts. This case study illustrates the eff...

... be reordered with respect to other memory instructions by ... our simulations, we do not model the global ... 3D ray tracing car Spec OpenMP SWIM-OMP ...

order. " DRP schemes 7 13 point. Shock capturing filters. Hybrid MPI/ OpenMP parallel. Jim Debonis: james.r.debonis@nasa.gov ...

A parallelization study designed for ADI-type algorithms is presented using the OpenMP specification for shared-memory multiprocessor programming. Details of optimizations specifically addressed to cache-based computer architectures are described and perf...

... Help in building and running MuSES models is available.1�3 ... OpenMP is a shared-memory programming standard with parallel regions of ...

Defining parallel regions, executing do loops in parallel, executing different code blocks whit different threads, restricting blocks, synchronizing threads, forcing consistent view, avoiding conflicts, specifying serial execution blocks

The document discusses message passage interfaces (MPI), open message passage issues and parallelization. A comparison of the two vector platforms, C90 and SVlex is presented. Sections of the document are written in computer code.

A. Waheed, and J. Yan. NAS System Division. NASA Ames Research Center. http ://science.nas.nasa.gov/Groups/Tools. /Projects/LCM/. 3/99 HJ. NPB-MPI/HPF/ ...

A. Woo, and M. Yarrow. The NAS Parallel. Benchmarks. 2.0. Tech_lical Report NAS- 95-020,. NASA. Ames Research. Center, Moffett Field, ...

Page 1. Page 2. Page 3. Page 4. Page 5. Page 6. Page 7. Page 8. Page 9. Page 10. Page 11. Page 12. Page 13. Page 14. Page 15. Page 16. Page ...

Introduction to debugger software. Serial debugging of array indexing, arguments mismatch, infinite loops, pointer misuse, and memory allocation. Parallel debugging of process count, shared memory, MPI I/O, collective communications, and OpenMP scope.

model/feature. Develop code. Compile-debug. Correctness test .... OpenMP: o focus on shared memory and loop parallelism; recent support for task parallelism ...

International Journal of Parallel Programming, Vol. 29, No. 3,2001. [SI H. Shan, J. Pal Singh, Comparison of Three Programming Models for Adaptive ...

It is presented a comparative performance study of a coarse grained parallel neural network training code, implemented in both OpenMP and MPI, standards for shared memory and message passing parallel programming environments, respectively. In addition, th...

H. Jin, M. Hribar and J. Yah, "Parallelization of ARC3D with Computer-Aided ... [11] Amy W. Lim and Monica S. Larn. "Maximizing. Parallelism and Minimizing ...

Key words: Code tuning, process-placement, OpenMP scaling, memory contention, unaligned memory access. 1 Introduction. An integral component of the support ...

Feb 8, 2011 ... Microscopic Theory and Simulation of Quantum-Well Intersubband Absorption: A Three-Subband Model ... to Efficient and Scalable Tool Generated OpenMP Code ... Benchmarking Memory Performance with the Data Cube Operator ...

An accurate frequency response characterization method for photoreceivers with optical heterodyne technique is presented in this paper. The characterization is implemented with two single-mode tunable lasers operating near the wavelength of 1.55 ?m. The errors introduced by extra fixtures as well as laser output fluctuations are ...

This research project resulted from recognizing the problem of being unable to accurately distinguish communication between wells in producing oil zones which may or may not be continuous. Bioluminescent bacteria are being developed for use as tracers in reservoir characterization. A pure culture of Photobacterium phosphoreum is being studied in the ...

The restoration of the DOE Complex will entail massive expenditures of funding and many person-years of effort. Underlying every aspect of this work is the need for accurate and timely characterization measurements. Applied research and development efforts to provide modern characterization tools for the DOE cleanup are organized ...

As a result of efforts to develop packaging techniques for large radio frequency hybrid microcircuits (HMC), the need for characterization of such microcircuits became apparent. Characterization of hybrids and their manufacturing processes for radio frequency applications is required for economic production. Many of the present rf HMC circuits require ...

Characterization of Soil Water Content Variability and Soil Texture using GPR Groundwave Techniques@ce.berkeley.edu ABSTRACT Accurate characterization of near-surface soil water content is vital for guiding agricultural. Characterizing the near-surface soil water content can be difficult, as this parameter is often ...

Knowledge-based systems (KBS) technology is rapidly gaining acceptance in the engineering community, due largely to the success of systems that are able to accurately diagnose faults in industrial or engineering applications. However, before diagnostic KBS problem-solving technology can become fully functional in the world of software engineering, we must gain a better ...

Characterization of mixed (radioactive and hazardous) wastes requires that all hazardous (e.g., heavy metals, volatile organic compounds-VOCs-and non-VOCs) and non-conforming materials (e.g. free liquids and pressurized containers) be identified, and that the identity and strengths of intrinsic radioactive sources be determined accurately. Comprehensive ...

Data races or races which occur in parallel programs such as OpenMP programs must be detected, because they may lead to unpredictable results of program executions. There are three representative tools which detect races which can occur in OpenMP programs: Thread Analyzer of Sun Inc., Thread Checker of Intel Corporation, and RaceStand of GNU. Two of these ...

In this paper, we accurately and carefully characterize a ferrite-core probe that is widely used for aircraft inspections. The characterization starts with the development of a model that can be executed using the proprietary volume-integral code, VIC-3D�, and then the model is fitted to measured multifrequency impedance data taken ...

Using a microengine as the primary test vehicle, the authors have examined several aspects of characterization. Parametric measurements provide fabrication process information. Drive signal optimization is necessary for increased microengine performance. Finally, electrical characterization of resonant frequency and quality factor can be more ...

This paper gives methods to characterize tight gas reservoirs in sufficient detail to allow an engineer to make accurate long-range production forecasts. These forecasts are the bases for sound engineering and business decisions. Because of the complexity and variability of tight gas reservoirs, the authors can present only general procedures for ...

In this paper, we accurately and carefully characterize a ferrite-core probe that is widely used for aircraft inspections. The characterization starts with the development of a model that can be executed using the proprietary volume-integral code, VIC-3D(c), and then the model is fitted to measured multifrequency impedance data taken ...

Motivated by the hypothesis that dilatancy plays a critical role in faulting in subduction zones, we are developing FDRA, a software package to simulate two-dimensional quasi-dynamic faulting that includes rate-state friction, thermal pressurization, dilatancy (following Segall and Rice [1995]), and flash heating [Rice, 2006]. FDRA accommodates full- and half-space models of faults having physical ...

A non-contact, high-resolution laser ranging device has been incorporated into an instrument for accurately mapping the surface of WECS airfoils in the field. Preliminary scans of composite materials and bug debris show that the system has adequate resolution to accurately map bug debris and other surface contamination. This system, just recently delivered ...

A multimodal CT protocol provides a comprehensive non-invasive survey of acute stroke patients with accurate demonstration of the site of arterial occlusion and its hemodynamic tissue status. It combines widespread availability with the ability to provide functional characterization of cerebral ischemia, and could potentially allow more ...

-based and airborne radars and lidars; and characterizing turbulence based on field measurement campaigns and high around high value structures. Detection via Airborne Doppler Radars As part of the NASA's Aviation Safety algorithms for use with airborne Doppler radars. These algorithms can provide timely and accurate warnings

A reference step-like pulse generator is described which has been developed at NBS. This generator can be used for accurately characterizing the step response of various kinds of transient recording equipment (oscilloscopes, waveform recorders, transient ...

Taxonomic characterizations of bacterial species are based, more and more, on the evaluation of large numbers of biochemical properties of many strains. For this purpose, rapid, accurate automatic devices for inoculations are needed. Such instruments are ...

varying geometries to be modeled. MEMS devices often have large feeding or connecting structures is producing new devices faster than they can be accurately and fully characterized. This leads to the production of devices that work for a specific application but are difficult to modify for other uses

for sequencing genomes D. The Human Genome Project II. Comparative Genomics III. Proteomics Genomics Compiling the sequence = genome sequenced multiple times to ensure the sequence is accurate #12;10 D. The Human Genome Project International research effort to characterize the genome of the human, GOALS: � Complete