Significant figures shown to clarify magnitudes. .... validation, and uncertainty quantification. Verification is the process of determining that a ...

The Virginia Department of Transportation (VDOT) has made significant investments in the traffic-monitoring infrastructure that supports intelligent transportation systems (ITS). The purpose of this infrastructure is to provide accurate, real-time informa...

... AD0244448. Title : A PROCEDURE FOR THE ACCURATE MEASUREMENT OF INFRARED DICHROISM OF ORIENTED FILMS. ...

The standard iterative procedure for solving fixed-source discrete-ordinates problems converges very slowly for problems in optically large regions with scattering ratios c near unity. The diffusion-synthetic acceleration method has been proposed to make use of the fact that for this class of problems the diffusion equation is often an accurate ...

... Accession Number : ADA003458. Title : An Accurate Economical Numerical Radiation Transport Algorithm. Descriptive Note : Memorandum rept.,. ...

... Computerized simulation, *Numerical methods and procedures, Turbomachinery, Compressible flow, Supercritical flow, Algorithms, ...

A numerical procedure is described for the evaluation of magnetic coordinates given a toroidal, scalar pressure plasma with an arbitrary magnetic field. The accurate representation of magnetic field strength in this way is invaluable for the calculation of drift orbits and transport in asymmetric plasmas. We include here an example of ...

... An accurate and useful model will require coupling sediment-transport with hydrodynamic forcing and stratigraphy. The ...

This project has resulted in a highly efficient method that has been shown to provide accurate solutions to a variety of 2D and 3D reactor problems. The goal of this project was to develop (1) an accurate and efficient three-dimensional whole-core neutronics method with the following features: based sollely on transport theory, does ...

The problem of monoenergetic neutral particle transport in an evacuated duct of arbitrary cross-sectional geometry with partial isotropic reflection at the duct walls is considered. This five-variable (three in space, two in angle) transport problem is approximated by a coupled set of N two-variable (one in space, one in angle) problems via a simple ...

A two-stage computational procedure is presented for the accurate determination of transverse normal

In this paper a new algorithm is presented for calculating the Green's function of the Schroedinger equation in the presence of block layered potentials. Such Green's functions have various and practical applications in quantum modelling of electron transport within nano-MOSFET transistors. The proposed method is based on expansions of the eigenfunctions of ...

A new multiwavelength sun-photometer has been developed to obtain accurate measurements of the atmospheric attenuation of direct solar radiation at seven window wavelengths in the visible and near-infrared spectral range. The instrument's optical features and performance are described. The photometer was calibrated by following a careful procedure based on ...

A new multiwavelength sun-photometer has been developed to obtain accurate measurements of the atmospheric attenuation of direct solar radiation at seven window wavelengths in the visible and near-infrared spectral range. The instrument's optical features and performance are described. The photometer was calibrated by following a careful procedure ...

... Accession Number : AD0764275. Title : A Machine-Independent ALGOL Procedure for Accurate Floating-Point Summation,. ...

The neutron transport equation in differenced with respect to all but the spatial variables and the solutions of the resulting systems of ordinary differential equations are studied. For the case of elastic scattering the approximate solution is obtanined and its convergence to the exact solution is proven. If very accurate approximations are ...

We present a new method to introduce phase-space fluctuations in transport theories, corresponding to a full implementation of the Boltzmann Langevin equation for fermionic systems. It is based on the procedure originally developed by Bauer et al. for transport codes employing the test particle method. In the new ...

This paper presents a tidally averaged model that approximates the long-term mixing processes of dissolved matter in tidal waters. The averaged transport model is based on a stochastic particle model. Because formal averaging techniques are used, the asymptotic validity of the approximation can be proven under the restriction that the diffusion coefficient is small. Numerical ...

... Title : NEW HIGH-PRECISION CREEP PROCEDURES FOR ACCURATE LIFE EXTENSION OF PLANT,. Corporate Author : ...

In this paper, an efficient and accurate numerical procedure to determine the thermo-hydrodynamic performance of cavitating bearings is described. ...

Nonspecific binding of anandamide to plastic exhibits many features that could be mistaken as biological processes, thereby representing an important source of conflicting data on the uptake and release of this lipophilic substance. Herein, we propose an improved method to assay anandamide transport, by using glass slides (i.e., coverslips) as physical support to grow cells. ...

Nonspecific binding of anandamide to plastic exhibits many features that could be mistaken as biological processes, thereby representing an important source of conflicting data on the uptake and release of this lipophilic substance. Herein, we propose an improved method to assay anandamide transport, by using glass slides (i.e., coverslips) as physical support to grow cells. ...

Modeling for Performance Assessment of the Waste Isolation Pilot Plant (WIPP ) has led to development of the SECO suite of codes for groundwater flow, particle tracking, and transport. Algorithm and code developments include the following areas: facilitation of grid convergence tests in multiple domains; correct treatment of transmissivity factors for unconfined aquifers; ...

TIGER provides experimenters and theorists with a method for the routine solution of coupled electron/photon transport in multilayer geometries. Emphasis is placed upon operationai simplicity without sacrificing the rigor of the model. TIGER combines condensed-history electron Monte Carlo with conventional singlescattering photon Monte Carlo in order to describe the ...

For the design of organic semiconductor devices such as organic light-emitting devices and solar cells, it is of crucial importance to solve the underlying charge transport equations efficiently and accurately. Only a fast and robust solver allows the use of fitting algorithms for parameter extraction and variation. Introducing appropriate models for ...

Monte Carlo simulations provide an indispensible model for solving radiative transport problems, but their slow convergence inhibits their use as an everyday computational tool. In this paper, we present two new ideas for accelerating the convergence of Monte Carlo algorithms based upon an efficient algorithm that couples simulations of forward and adjoint ...

... false Scale requirements for accurate weights, repairs, adjustments, and replacements...PROCEDURES AND REQUIREMENTS FOR ACCURATE WEIGHTS § 442.3 Scale requirements for accurate weights, repairs, adjustments, and...

radiation transport and updated hardness assurance guidelines ... Accurate radiation transport captures low-energy proton soft ...

A one-dimensional transport model for simulating water flow and solute transport in homogeneous-heterogeneous, saturated-unsaturated porous media is presented. The model is composed of a combination of accurate numerical algorithms for solving the nonlinear Richard's and advection-dispersion equations (ADE). The mixed form of Richard's ...

During the last year, a considerable effort was mounted to devise accurate and efficient numerical methods for the solution of curvilinear transport problems in the optically thick, diffusive regime. Much work has already been completed on these methods in slab and x-y geometries. The principle tool in designing these methods is an asymptotic analysis that ...

During the last year, a considerable effort was mounted to devise accurate and efficient numerical methods for the solution of curvilinear transport problems in the optically thick, diffusive regime. Much work has already been completed on these methods in slab and x-y geometries. The principle tool in designing these methods is an asymptotic analysis that ...

Spatial adaption procedures for the accurate and efficient solution of steady and unsteady inviscid flow problems are described. The adaption procedures were developed and implemented within a two-dimensional unstructured-grid upwind-type Euler code. Thes...

The procedures for selecting engines for transport and combat aircraft during the design process are

A system of programs which model the chemistry and transport of carbon monoxide and methane in the Earth's atmosphere on a global scale was installed onto the NASA-Langley central scientific computer network. This system, the GLOBAL system, consists of a user-friendly set of procedural files which allow for simplified pre-processing, execution, ...

... TRANSPORTABILITY TESTING OF THE ENGINEER EQUIPMENT TRAILER (EET), TP-94-01, "TRANSPORTABILITY TESTING PROCEDURES" ...

... Title : MILSTAMP TACs: Military Standard Transportation and Movement Procedures. Transportation Account Codes. Volume 2. Change 3. ...

The type of transportation system employed by a wood-fired power plant (WFPP) will have a major impact on the success or failure of that operation. Procedures employed in transporting the wood influence the cost and the community's acceptance of the plant. Several alternative designs of a transportation ...

... TP-94-01, "TRANSPORTABILITY TESTING PROCEDURES" Prepared for: ... TP-94-01, Revision 2, June 2004, "Transportability Testing Procedures." ...

representation of transport processes. Flow and transport processes are integrally linked meaning that precise quantification of the fluid dynamics is required to accurately...

In this paper two difference schemes are derived for numerically solving the transport equation in spherical geometry. The first difference method is positive; i.e., the calculated fluxes are never negative. furthermore, for the first method, the error expansion is suitable for applying Richardson extrapolation with respect to both spatial and angular variables to increase the ...

Spatial discretization methods have been developed for the low-order quasi-diffusion equations on coarse grids and corresponding homogenization procedure for full-core reactor calculations. The proposed methods reproduce accurately the complicated large-scale behavior of the transport solution within assemblies. The developed ...

A finite element-based numerical strategy for interface tracking is developed for the simulation of two-phase flows. The method is based on the solution of an advection equation for the so-called pseudo-concentration of one of the phases. To obtain an accurate description of the interface, a streamline upwind Petrov-Galerkin (SUPG) scheme is combined with an automatic mesh ...

This study is a review of important methods for the determination of uranium. Attention is paid mostly to those methods which determine the concentration of uranium very accurately, and are reproducible and procedurally simple. (59 references). (ERA citat...

... false Criteria and procedures: Projects from a transportation plan and TIP...Transportation Plans, Programs, and Projects Developed, Funded or Approved Under...93.115 Criteria and procedures: Projects from a transportation plan and...

... false Criteria and procedures: Projects from a transportation plan and TIP...Transportation Plans, Programs, and Projects Developed, Funded or Approved Under...93.115 Criteria and procedures: Projects from a transportation plan and...

This report contains a critical review of the literature on existing field studies of the spatial variability of soil water and chemical retention and chemical transport in unsaturated soils. The report covers static soil properties, water transport properties, solute concentration variations, and observations of maximum solute ...

Collecting and analyzing high frequency emission measurements has become very usual during the past decade as significantly more information with respect to formation conditions can be collected than from regulated bag measurements. A challenging issue for researchers is the accurate time-alignment between tailpipe measurements and engine operating variables. An alignment ...

For over 50 years, electron beams have been an important modality for providing an accurate dose of radiation to superficial cancers and disease and for limiting the dose to underlying normal tissues and structures. This review looks at many of the important contributions of physics and dosimetry to the development and utilization of electron beam therapy, including electron ...

Renormalization group (RNG) methods are applied to eliminate small scales and construct a subgrid scale (SSM) transport eddy model for transition phenomena. The RNG and SSM procedures are shown to provide a more accurate description of viscosity near the wall than does the Smagorinski approach and also generate farfield turbulence ...

For over 50 years, electron beams have been an important modality for providing an accurate dose of radiation to superficial cancers and disease and for limiting the dose to underlying normal tissues and structures. This review looks at many of the important contributions of physics and dosimetry to the development and utilization of electron beam therapy, including electron ...

Prediction of radionuclide migration through soil and groundwater requires models which have been tested under a variety of conditions. Unfortunately, many of the existing models have not been tested in the field, partly because such testing requires accurate and representative data. This report provides the design of a large scale field experiment representative, in terms ...

An efficient method was proposed to determine the cross sections of charge exchange in ion-molecule collisions. The cross sections for charge exchange were derived by comparing the calculated ion transport parameters with the measured data. The computational procedure was presented by obtaining the cross sections of charge exchange for NO+ and CO+ ions in ...

The basic problem addressed in the project was that of accelerating the iterative convergence of Discrete Ordinates (S{sub N}) problems. Important previous work on this problem, much of which was done at LANL, has shown that the Diffusion Synthetic Acceleration (DSA) method can be a very effective acceleration procedure. However, in two-dimensional geometries, only the diamond ...

... Accurate Computation of Non-Negative Anisotropic Group Scattering Cross Sections for Discrete Ordinates and Monte Carlo Radiation Transport. ...

The diffuse reflectance spectrum of human skin in the visible region (400-800 nm) contains information on the concentrations of chromophores such as melanin and haemoglobin. This information may be extracted by fitting the reflectance spectrum with an optical diffusion based analytical expression applied to a layered skin model. With the use of the analytical expression, it is assumed that light ...

The analysis of mass-transport processes in battery systems requires accurate values of the transport properties of electrolytic solutions. A generally valid theory of mass transport is presented and described. Mass-transport properties are defined by the...

A system has been developed to assess radiation dose distribution inside the body of exposed persons in a radiological accident by utilising radiation transport calculation codes-MCNP and MCNPX. The system consists mainly of two parts, pre-processor and post-processor of the radiation transport calculation. Programs for the pre-processor are used to set up ...

The guidelines in the report were developed from a comprehensive analytical methodology to assess the three-dimensional stress state imposed in pipelines at railroad and highway crossings, as well as the validation of the analytical models by full-scale field experiments. The result is a design procedure so that uncased pipelines can be installed safely and reliably with ...

... Coupled electron photon transport; Photon transport; Charge ... ELECTRON TRANSPORT, ELECTRONS ... PROCEDURES, PHOTONS, SCATTERING ...

The procedures for evaluating the performance of multijunctiion-concentrator cells at the National Renewable Energy Laboratory are described. The accurate measurement of the performance of multijunction cells requires accurate relative-quantum-efficiency-measurements, "matched" reference cells, and a spectrally adjustable solar ...

A detailed set of recommendations is provided on voice communications procedures and language for commercial diving. The recommendations cover techniques of speaking, message checking to ensure accurate reception, the selection of names for tools and equi...

Rapid and accurate determination of the efficacy of sterilization procedures is demonstrated using a hand-held instrument based on the intrinsic fluorescence of germinating spores. This technology requires no added reagents or sample contact.

A forward-marching procedure for separated boundary-layer flows which permits the rapid and accurate

Aug 30, 2005 ... Other utilization goals such as passengers or tonnage carried or hours used should be applied if mileage is not an accurate measurement for ...

... is presented for combining an accurate orthogonal curvilinear coordinate generation procedure ... In this method, the coordinates are generated from ...

... Rapid culture, though highly accurate, involves a lengthy incubation and testing procedure, and is therefore not conducive ...

An efficient solution procedure for time-accurate solutions of Incompressible Navier-Stokes equation

This paper presents a procedure for estimating an accurate model of the CT imaging process including

... Although an appropriate filtering procedure and propagation ... temperature equation source term, but more ... to model accurately fuel oxidation or auto ...

... of laboratory methods (or scientific regulatory information ... procedures, that the reported methods or techniques are ... and accurate for use as a regulatory method. ...

The objective of the procedure is to measure the ability of a gun control system to bring accurate and rapid fire to bear on stationary or moving targets. (Author)

... The present article, in complementary fashion, presents substantially accurate procedures for determining appropriate sample size based on ...

... Replica thickness variation studies are providing the basic design information ... tests resulted in standardized procedures for Rh plating replicas. ...

... This HEN procedure controls the crack growth rate in the finite element model by following the experimental displacement rates accurately. ...

... JAGUAR analytical procedures were developed for the accurate calculation of detonation properties of high-blast aluminized explosives. ...

... instrument calibrations are usually obtained by usag a very accurate laboratory barometer. The altitude scales on these barometers are based on ...

A simple analytical procedure is described for accurately and precisely determining the zirconium or

... These methods and procedures would be used to provide accurate data for designing drilling mud systems and cement jobs for these deep, hot ...

... AND DEPTH (CTD) PROFILER ... To ensure accurate sound velocity profiles, it is important that CTD sensors are properly calibrated. Techniques ...

A combined modulated free carrier absorption (MFCA) and photocarrier radiometry (PCR) technique is developed to determine simultaneously the electronic transport properties (carrier diffusion coefficient, carrier lifetime, and front surface recombination velocity) of silicon wafers. Comparative computer simulations are carried out to investigate how the experimental ...

Random walk particle tracking methodologies to simulate solute transport constitute an attractive technique for their computational efficiency and absence of numerical dispersion. Yet, the complexity of implementing mass transfer processes and chemical speciation into transport codes often complicates particle tracking simulations. In this context we ...

The streaming matrix hybrid method (SMHM) is a deterministic streaming method applied in void regions within a discrete-ordinates problem. The SMHM is used within the discrete-ordinates space-angle sweeping scheme so that it remains inside the standard discrete-ordinates inner iteration procedure. Streaming matrix equations are derived from the integral ...

Modern nodal methods have been known for some time to be very accurate and efficient for practical reactor calculations on bundle-sized grids, their main limitation being the accuracy of the homogenized parameters used. Thus, various methods have been proposed to determine these parameters and related flux discontinuity factors. However, most procedures ...

The U.S. Materials Transportation Bureau (MTB) published a notice of proposed rulemaking on 6/7/79 proposing the adoption of a numerical identification system for hazardous materials transported in commerce. The purpose of the proposed regulations is to improve the capability of emergency response personnel (fire, police, et al.) to quickly identify ...

This paper contains a review of the challenges specific to the EBR-II core physics, a description of the methods and techniques which have been developed for addressing these challenges, and the results of some validation studies relative to power-distribution calculations. Numerical tests have shown that the VARIANT nodal code yields eigenvalue and power predictions as ...

An improved procedure for evaluating transportation alternatives has been developed. A Procedural Guide has been prepared to assist State and regional officials in transportation decision making and planning. The procedure takes into account increased soc...

...2010-10-01 false Compliance procedures. 28.170 Section 28.170 Transportation Office of the Secretary of Transportation...CONDUCTED BY THE DEPARTMENT OF TRANSPORTATION § 28.170 Compliance procedures. (a) Except as...

In this study the capability of numerical models to transport anomalously dense bottom waters from the areas of their generation on the shelf to deepwater areas is considered. These numerical models have a number of mechanisms that are favorable for this transport, but unrelated directly with the real physics of that motion. A more ...

Automatic differentiation (AD) is a technique for generating efficient and reliable derivative codes from computer programs with a minimum of human effort. Derivatives of model output with respect to input are obtained exactly. No intrinsic limits to program length or complexity exist for this procedure. Calculation of derivatives of complex numerical models is required in ...

Accurate data describing the status of the transportation network is the backbone of system operations management. Without accurate data, traffic engineers cannot optimize signal phasing and timing, effective incident management cannot be undertaken, deci...

Reactive flow systems often consist of multicomponent mixtures of neutral gases. Accurate modelling of reactive flows will, in many cases, require the accurate representation of transport phenomena in the conservation equations. In this paper, we identify...

The authors developed an ELLAM-MFEM solution procedure for the numerical simulation of compressible fluid flows in porous media with point sources and sinks. An Eulerian-Lagrangian localized adjoint method (ELLAM), which was previously shown to outperform many widely used and well-regarded methods in the context of linear transport partial differential ...

... STUDY OF THE EFFECT OF DEPARTURE K PROCEDURES ON THE NOISE PRODUCED "X BY JET TRANSPORT AIRCRAFT ... 4 B. Noise Data . ...

... Title : Gas Properties Computational Procedure Suitable for ... Descriptors : *Gases, *Thermodynamics, *Transport properties, *Data reduction ...

... Development of Standard Procedures for Shipboard Print Inspection US DEPARTMENT OF TRANSPORTATION ... for Shipboard Paint Inspection by ...

A computational procedure for describing transport of electrons in condensed media has been ... A primary purpose for developing the procedure has been to ...

... TP-94-019 "TRANSPORTABILITY TESTING PROCEDURES" ... tested in accordance with TP-94-01, "Transportability Testing Procedures." ...

... Title : Monte Carlo Procedures for Transport of X-Rays and Fluorescent Light Through a Spherical, Altitude-Dependent Atmosphere: Vol. ...

The study analyzed the impacts of financing procedures and constraints on the transportation systems of small urban areas, examined the effectiveness of public transportation planning, and developed an allocation procedure for state transit assistance pro...