Iterated integrals of superconnections
Igusa, Kiyoshi
2009-01-01T23:59:59.000Z
Starting with a Z-graded superconnection on a graded vector bundle over a smooth manifold M, we show how Chen's iterated integration of such a superconnection over smooth simplices in M gives an A-infinity functor if and only if the superconnection is flat. If the graded bundle is trivial, this gives a twisting cochain. Very similar results were obtained by K.T. Chen using similar methods. This paper is intended to explain this from scratch beginning with the definition and basic properties of a connection and ending with an exposition of Chen's "formal connections" and a brief discussion of how this is related to higher Reidemeister torsion.
Iterative solutions of simultaneous equations
Laycock, Guyron Brantley
1962-01-01T23:59:59.000Z
ITERATIVE SOLUTIONS OP SIKJLTANEOUS EQUATIONS G~cn Hrantlep I aycock Approved. as to style snd, content by& (Chairman of Committee) E. c. (Head. of Department August 1/62 ACKNOWLEDGEMENT The author wishes to thank Dr. Hi A. Luther for his time sn4.... . . . ~ ~ . . ~ III. JACOBI AND 6AUSS-SEIDEL METHODS I V ~ C ONCLUS I GN ~ ~ ~ a ~ ~ ~ t ~ ~ ~ ~ a ~ 1 ~ ~ ~ ~ ~ ~ 9 ~ . ~ 18 V BIBLIOGRAPHY ~ ~ ~ o ~ ~ t ~ ~ ~ ~ 1 ~ ~ ~ VI ~ APPENDIX ~ ~ o ~ ~ e ~ o ~ ~ o o ~ ~ ~ . 22 Px'ogl am Lisliiixlgs...
ITERATED INTEGRALS OF SUPERCONNECTIONS KIYOSHI IGUSA
Igusa, Kiyoshi
ITERATED INTEGRALS OF SUPERCONNECTIONS KIYOSHI IGUSA Abstract. Iterated integration of a connection gives the holonomy or parallel transport of the connection. Iterated integration of a superconnection gives something else which we call a "superconnection parallel transport." We ask under what conditions
ITERATED INTEGRALS OF SUPERCONNECTIONS KIYOSHI IGUSA
Igusa, Kiyoshi
ITERATED INTEGRALS OF SUPERCONNECTIONS KIYOSHI IGUSA Abstract. Starting with a Z-graded superconnection on a graded vector bun- dle over a smooth manifold M, we show how Chen's iterated integration of such a superconnection over smooth simplices in M gives an A functor if and only if the superconnection is flat
Error Control of Iterative Linear Solvers for Integrated Groundwater Models
Dixon, Matthew; Brush, Charles; Chung, Francis; Dogrul, Emin; Kadir, Tariq
2010-01-01T23:59:59.000Z
An open problem that arises when using modern iterative linear solvers, such as the preconditioned conjugate gradient (PCG) method or Generalized Minimum RESidual method (GMRES) is how to choose the residual tolerance in the linear solver to be consistent with the tolerance on the solution error. This problem is especially acute for integrated groundwater models which are implicitly coupled to another model, such as surface water models, and resolve both multiple scales of flow and temporal interaction terms, giving rise to linear systems with variable scaling. This article uses the theory of 'forward error bound estimation' to show how rescaling the linear system affects the correspondence between the residual error in the preconditioned linear system and the solution error. Using examples of linear systems from models developed using the USGS GSFLOW package and the California State Department of Water Resources' Integrated Water Flow Model (IWFM), we observe that this error bound guides the choice of a prac...
ITERATED INTEGRALS OF SUPERCONNECTIONS 0902a KIYOSHI IGUSA
Igusa, Kiyoshi
ITERATED INTEGRALS OF SUPERCONNECTIONS 0902a KIYOSHI IGUSA Abstract. Iterated integration of a superconnection gives something else which we call a "superconnection parallel transport." We ask under what the superconnection parallel transports give homotopies and higher homotopies of these chain maps. This happens
Accelerated Iterative Method for Solving Steady Solutions of Linearized Atmospheric Models
Watanabe, Masahiro
Accelerated Iterative Method for Solving Steady Solutions of Linearized Atmospheric Models Masahiro approach, referred to as the accelerated iterative method (AIM), is developed for solving steady state, respectively. For ensuring the accelerated asymptotic convergence of iterative procedure
Iterative algorithm for the volume integral method for magnetostatics problems
Pasciak, J.E.
1980-11-01T23:59:59.000Z
Volume integral methods for solving nonlinear magnetostatics problems are considered in this paper. The integral method is discretized by a Galerkin technique. Estimates are given which show that the linearized problems are well conditioned and hence easily solved using iterative techniques. Comparisons of iterative algorithms with the elimination method of GFUN3D shows that the iterative method gives an order of magnitude improvement in computational time as well as memory requirements for large problems. Computational experiments for a test problem as well as a double layer dipole magnet are given. Error estimates for the linearized problem are also derived.
From Use Cases of the Joint European Torus towards Integrated Commissioning Requirements of the ITER Tokamak
Preconditioning and iterative solution of symmetric indefinite linear systems arising
Chuan, Toh Kim
of equations. As justified by Freund and Jarre [5], iterative algorithms have many advantages over direct
Engineering aspects of design and integration of ECE diagnostic in ITER
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Udintsev, V.S.; Taylor, G.; Pandya, H.K.B.; Austin, M.E.; Casal, N.; Catalin, R.; Clough, M.; Cuquel, B.; Dapena, M.; Drevon, J.-M.; et al
2015-03-12T23:59:59.000Z
ITER ECE diagnostic [1] needs not only to meet measurement requirements, but also to withstand various loads, such as electromagnetic, mechanical, neutronic and thermal, and to be protected from stray ECH radiation at 170 GHz and other millimeter wave emission, like Collective Thomson scattering which is planned to operate at 60 GHz. Same or similar loads will be applied to other millimetre-wave diagnostics [2], located both in-vessel and in-port plugs. These loads must be taken into account throughout the design phases of the ECE and other microwave diagnostics to ensure their structural integrity and maintainability. The integration of microwave diagnosticsmore »with other ITER systems is another challenging activity which is currently ongoing through port integration and in-vessel integration work. Port Integration has to address the maintenance and the safety aspects of diagnostics, too. Engineering solutions which are being developed to support and to operate ITER ECE diagnostic, whilst complying with safety and maintenance requirements, are discussed in this paper.« less
Error Control of Iterative Linear Solvers for Integrated Groundwater Models
Bai, Zhaojun
gradient method or Generalized Minimum RESidual (GMRES) method, is how to choose the residual tolerance for integrated groundwater models, which are implicitly coupled to another model, such as surface water models the correspondence between the residual error in the preconditioned linear system and the solution error. Using
Cowley, Steve
2005-10-10T23:59:59.000Z
This year six international partners have signed up to construct the first burning plasma experiment -- ITER -- in the South of France.It is over 50 years since the beginning of national programs to produce controlled fusion energy. The challenge of fusion energy has proven harder than was first anticipated. In this Colloquium Steve Cowley from UCLA will explain the scientific issues and how the difficulties have been overcome.
Iterative Solution of Maxwell's Equations for an Induction Motor
Shayak Bhattacharjee
2014-07-29T23:59:59.000Z
In this work we use classical electromagnetism to analyse a three-phase induction motor. We first cast the motor as a boundary value problem involving two phenomenological time-constants. These are derived from the widely used equivalent circuit model of the induction motor. We then use an iterative procedure to evaluate these constants and obtain the motor performance equations. Our results depend only on the geometrical parameters of the motor and can be used to derive precise expressions for the excitation frequency and applied voltage needed to extract maximum performance from a given motor at any rotation speed.
Leclerc, Arnaud
2015-01-01T23:59:59.000Z
A global solution of the Schr\\"odinger equation for explicitly time-dependent Hamiltonians is derived by integrating the non-linear differential equation associated with the time-dependent wave operator. A fast iterative solution method is proposed in which, however, numerous integrals over time have to be evaluated. This internal work is done using a numerical integrator based on Fast Fourier Transforms (FFT). The case of a transition between two potential wells of a model molecule driven by intense laser pulses is used as an illustrative example. This application reveals some interesting features of the integration technique. Each iteration provides a global approximate solution on grid points regularly distributed over the full time propagation interval. Inside the convergence radius, the complete integration is competitive with standard algorithms, especially when high accuracy is required.
Solution characters of iterative coupling between energy simulation and CFD programs
Chen, Qingyan "Yan"
1 Solution characters of iterative coupling between energy simulation and CFD programs Zhiqiang Energy simulation (ES) and computational fluid dynamics (CFD) provide important and complementary information for building energy and indoor environment designs. A coupled ES and CFD simulation can eliminate
Solution characters of iterative coupling between energy simulation and CFD programs
Zhai, John Z.
States, building services consume more than one third of the primary energy consumption and twoSolution characters of iterative coupling between energy simulation and CFD programs Zhiqiang Zhaia Massachusetts Avenue, Cambridge, MA 02139-4307, USA b School of Mechanical Engineering, Purdue University, 1288
Iterative solutions to large sparse finite element equations
Wang, Hongbing
1995-01-01T23:59:59.000Z
for the direct and PCG methods using various storage formats. Effects of different material properties and external loading on the convergence rate and solution time are also analyzed. The test problems for this study are based on the three-dimensional linear...
Integrated modelling of steady-state scenarios and heating and current drive mixes for ITER
Murakami, Masanori [ORNL; Park, Jin Myung [ORNL; Giruzzi, G. [CEA, IRFM, France; Garcia, J. [CEA Cadarache, St. Paul lex Durance, France; Bonoli, P. T. [Massachusetts Institute of Technology (MIT); Budny, R. V. [Princeton Plasma Physics Laboratory (PPPL); Doyle, E. J. [University of California, Los Angeles; Fukuyama, A. [Kyoto University, Japan; Ferron, J.R. [General Atomics, San Diego; Hayashi, N. [Japan Atomic Energy Agency (JAEA), Naka; Honda, M. [Japan Atomic Energy Agency (JAEA), Naka; Hubbard, A. [MIT Plasma Science & Fusion Center, Cambridge, MA 02139 USA; Hong, R. M. [General Atomics, San Diego; Ide, S. [Japan Atomic Energy Agency (JAEA), Naka; Imbeaux, F. [CEA Cadarache, St. Paul lex Durance, France; Jaeger, Erwin Frederick [ORNL; Jernigan, Thomas C [ORNL; Luce, T.C. [General Atomics, San Diego; Na, Y S [Seoul National University of Technology, Korea; Oikawa, T. [ITER Organization, Saint Paul Lez Durance, France; Osborne, T.H. [General Atomics, San Diego; Parail, V. [Association EURATOM-CCFE, Abingdon, UK; Polevoi, A. [ITER Organization, Saint Paul Lez Durance, France; Prater, R. [General Atomics; Sips, A C C [Max Planck Institute for Plasma Physics, Garching, Germany; Shafer, M. W. [University of Wisconsin, Madison; Snipes, J. A. [ITER Organization, Cadarache, France; St. John, H. E. [ITER Organization, Saint Paul Lez Durance, France; Snyder, P. B. [General Atomics, San Diego; Voitsekhovitch, I [UKAEA Fusion, Culham UK
2011-01-01T23:59:59.000Z
Recent progress on ITER steady-state (SS) scenario modelling by the ITPA-IOS group is reviewed. Code-to-code benchmarks as the IOS group's common activities for the two SS scenarios (weak shear scenario and internal transport barrier scenario) are discussed in terms of transport, kinetic profiles, and heating and current drive (CD) sources using various transport codes. Weak magnetic shear scenarios integrate the plasma core and edge by combining a theory-based transport model (GLF23) with scaled experimental boundary profiles. The edge profiles (at normalized radius rho = 0.8-1.0) are adopted from an edge-localized mode-averaged analysis of a DIII-D ITER demonstration discharge. A fully noninductive SS scenario is achieved with fusion gain Q = 4.3, noninductive fraction f(NI) = 100%, bootstrap current fraction f(BS) = 63% and normalized beta beta(N) = 2.7 at plasma current I(p) = 8MA and toroidal field B(T) = 5.3 T using ITER day-1 heating and CD capability. Substantial uncertainties come from outside the radius of setting the boundary conditions (rho = 0.8). The present simulation assumed that beta(N)(rho) at the top of the pedestal (rho = 0.91) is about 25% above the peeling-ballooning threshold. ITER will have a challenge to achieve the boundary, considering different operating conditions (T(e)/T(i) approximate to 1 and density peaking). Overall, the experimentally scaled edge is an optimistic side of the prediction. A number of SS scenarios with different heating and CD mixes in a wide range of conditions were explored by exploiting the weak-shear steady-state solution procedure with the GLF23 transport model and the scaled experimental edge. The results are also presented in the operation space for DT neutron power versus stationary burn pulse duration with assumed poloidal flux availability at the beginning of stationary burn, indicating that the long pulse operation goal (3000s) at I(p) = 9 MA is possible. Source calculations in these simulations have been revised for electron cyclotron current drive including parallel momentum conservation effects and for neutral beam current drive with finite orbit and magnetic pitch effects.
Chapter 5 & 6 1. Evaluate the iterated integral ? 3 ? 2 xy (x2 + y2 ...
2015-04-06T23:59:59.000Z
Chapter 5 & 6. 1. Evaluate the iterated integral. ? 3. 1. ? 2. 1 xy. (x2 + y2). 3/2 dxdy. 2. Find the volume bounded by the graph of f(x, y)=1+2x + 3y, the rectangle
Progress in the Integrated Simulation of Thermal-Hydraulic Operation of the ITER Magnet System
Bagnasco, M; Bessette, D; Marinucci, C
2010-01-01T23:59:59.000Z
A new integrated computer code is being developed for the simulations of the overall behavior of the ITER magnet cryo-system. The existing THEA, FLOWER and POWER codes, assembled as modules of a computational environment (Super-Magnet) have been upgraded to perform global simulations of the cooling circuit for the ITER magnet system. The thermal coupling resulting from the generic geometric configurations has been implemented to realize quasi-three-dimensional simulations of the winding pack. In this paper we present details on the model.
Overlapping local/global iteration framework for whole-core transport solution
Cho, N. Z.; Yuk, S.; Yoo, H. J.; Yun, S. [Korea Advanced Inst. of Science and Technology KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701 (Korea, Republic of)
2012-07-01T23:59:59.000Z
In current practice of reactor design analysis, whole-core diffusion nodal method is used in which nodal parameters are provided by single-assembly lattice physics calculation with net current zero boundary condition. Thus, the whole-core solution is not transport, because the inter-assembly transport effect is not incorporated. In this paper, the overlapping local/global iteration framework is described that removes the limitation of the current method. It consists of two-level iterative computations: half-node overlapping local problems embedded in a global problem. The local problem can employ fine-group deterministic or continuous-energy stochastic (Monte Carlo) transport methods, while the global problem is an equivalent coarse-group transport model based on p-CMFD methodology. The method is tested on several highly heterogeneous multi-slab problems with encouraging results. (authors)
Park, Namkyoo
_Ij , . Results 71 (1530~1600nm, 1nm , : -13dBm) 14 (1425~1480nm, 5nm 1495nm) DSF(Dispersion Shifted evolution along the fiber after 6 iterations in the counter-pumping (1530 ~1600nm, with1nm spacing) Fig.3
Integrating Variable Renewable Energy: Challenges and Solutions
Bird, L.; Milligan, M.; Lew, D.
2013-09-01T23:59:59.000Z
In the U.S., a number of utilities are adopting higher penetrations of renewables, driven in part by state policies. While power systems have been designed to handle the variable nature of loads, the additional supply-side variability and uncertainty can pose new challenges for utilities and system operators. However, a variety of operational and technical solutions exist to help integrate higher penetrations of wind and solar generation. This paper explores renewable energy integration challenges and mitigation strategies that have been implemented in the U.S. and internationally, including forecasting, demand response, flexible generation, larger balancing areas or balancing area cooperation, and operational practices such as fast scheduling and dispatch.
"Enhancing iterative solution methods for general FEM computations using rigid body modes."
Vuik, Kees
Structures Geomechanics Enhancing iterative solvers in Diana June 27, 2014 5 #12;Finite elements applications Structures Geomechanics Dams and dikes Enhancing iterative solvers in Diana June 27, 2014 5 #12;Finite elements applications Structures Geomechanics Dams and dikes Tunneling Enhancing iterative solvers in Diana
Guide to Cement-Based Integrated Pavement Solutions
Guide to Cement-Based Integrated Pavement Solutions August 2011 #12;Cement-Based Integrated Pavement Solutions Heavy Industrial Airports Highways Country Roads Arterials Commercial Commercial Residential Recreation LAND USE CEMENT-BASED INTEGRATED PAVEMENT SOLUTIONS 1 2 3 4 5 6 7 8
Bai, Xiaoli
2011-10-21T23:59:59.000Z
at different times. This dissertation presents a unified framework that applies modified Chebyshev-Picard iteration (MCPI) methods for solving both IVPs and BVPs. Existing methods for solving IVPs and BVPs have not been very successful in exploiting parallel...
Iftikhar Ali; Bilal Chanane; Nadeem A. Malik
2014-07-31T23:59:59.000Z
We consider a time fractional differential equation of order $\\alpha$, $0 0, t > 0, \\quad c(x,0)=f(x). $$ where ${}^C_0\\mathcal{D}_t^{\\alpha}$ is the Caputo fractional derivative of order $\\alpha$, $A$ is a linear differential operator, $q(x,t)$ is a source term, and $f(x)$ is the inital condition. Approximate (truncated) series solutions are obtained by means of the Variational Iteration Method (VIM). We find the series solutions for different cases of the source term, in a form that is readily implementable on the computer where symbolic computation platform is available. The error in truncated solution $c_n$ diminishes exponentially fast for a given $\\alpha$ as the number of terms in the series increases. VIM has several advantages over other methods that produce solutions in the series form. The truncated VIM solutions often converge rapidly requiring only a few terms for fast and accurate approximations.
Twin-Screw Extruder and Pellet Accelerator Integration Developments for ITER
Meitner, Steven J [ORNL; Baylor, Larry R [ORNL; Combs, Stephen Kirk [ORNL; Fehling, Dan T [ORNL; Foust, Charles R [ORNL; McGill, James M [ORNL; Rasmussen, David A [ORNL; Maruyama, So [ITER Organization, Cadarache, France
2011-01-01T23:59:59.000Z
The ITER pellet injection system consisting of a twinscrew frozen hydrogen isotope extruder, coupled to a combination solenoid actuated pellet cutter and pneumatic pellet accelerator, is under development at the Oak Ridge National Laboratory. A prototype extruder has been built to produce a continuous solid deuterium extrusion and will be integrated with a secondary section, where pellets are cut, chambered, and launched with a single-stage pneumatic accelerator into the plasma through a guide tube. This integrated pellet injection system is designed to provide 5 mm fueling pellets, injected at a rate up to 10 Hz, or 3 mm edge localized mode (ELM) triggering pellets, injected at higher rates up to 20 Hz. The pellet cutter, chamber mechanism, and the solenoid operated pneumatic valve for the accelerator are optimized to provide pellet velocities between 200-300 m/s to ensure high pellet survivability while traversing the inner wall fueling guide tubes, and outer wall ELMpacing guide tubes. This paper outlines the current twin-screwextruder design, pellet accelerator design, and the integrationrequired for both fueling and ELM pacing pellets.
Review of ITER Physics Issues and Possible Approaches to their Solution
to Reversed Shear qMIN 1.0 - 1. 8 >2.0 qEDGE 3 3.5-5 4-5 Sawteeth Present, Sought Absent, 3/2 mode t p * t R t W G=H89PN/q95 2=0.5-0.4, q95~3.4 G=0.75 Weak Shear High & AT (self regulating) regime > R to ITER · ITER Baseline- Conventional Sawtoothing, Elming H-mode Conservative route to 500 MW, 400
The IBM Health Integration Framework: Accelerating solutions for smarter healthcare
in improving health- care access, cost, quality of care and patient satisfaction. But progress can take many Integration Framework is a unified software platform for implementing comprehensive solutions for health- careThe IBM Health Integration Framework: Accelerating solutions for smarter healthcare Healthcare
Shi, C.-J. Richard
--A new circuit analysis method, named SPICE- accurate iterative linear-centric analysis (SILCA 2006 1087 SILCA: SPICE-Accurate Iterative Linear-Centric Analysis for Efficient Time-Domain Simulation integrated (VLSI) circuits with strong parasitic couplings. SILCA consists of two key linear-centric tech
Integrating Variable Renewable Energy: Challenges and Solutions
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article)41clothThe Bonneville PowerTariff Pages default Sign In AboutIs gravity a particle or aâ˜…Safety Integrating Variable
Integral relations for solutions of confluent Heun equations
Léa Jaccoud El-Jaick; Bartolomeu D. B. Figueiredo
2015-03-02T23:59:59.000Z
Firstly, we construct kernels of integral relations among solutions of the confluent Heun equation (CHE) and its limit, the reduced CHE (RCHE). In both cases we generate additional kernels by systematically applying substitutions of variables. Secondly, we establish integral relations between known solutions of the CHE that are power series and solutions that are series of special functions; and similarly for solutions of the RCHE. Thirdly, by using one of the integral relations as an integral transformation we obtain a new series solution of the spheroidal wave equation. From this solution we construct new solutions of the general CHE, and show that these are suitable for solving the radial part of the two-center problem in quantum mechanics. Finally, by applying a limiting process to kernels for the CHEs we obtain kernels for {two} double-confluent Heun equations. As a result, we deal with kernels of four equations of the Heun family, each equation presenting a distinct structure of singularities. In addition, we find that the known kernels for the Mathieu equation are special instances of kernels of the RCHE.
Numerical solution of the inversion integral
Bradford, Halley Oren
1964-01-01T23:59:59.000Z
on the set S and the relationship is denoted by w f(z). Circular ne borhood. Let sO be a point and r a positive nzm- bex. Then the set of aL1 points z snch that (z - zdt & x is called a perivative of a lex ~r. Consider z to be any point, of same..., then the contour integral along C is defined by the eqnation b f(z)dz - f $(t) + iy(t) $(t) + iry~(t) dt Polar form of a c ' lex number. The polar 1'orm of a complex number z x+ iy is defined by the equation z r(cos& + isin& ), share x roose, V rein& (r & 0...
ILP and Iterative LP Solutions for Peak and Average Power Optimization in HLS
Ramanujam, J. "Ram"
. Ramanujam2 1 Electrical Engineering Dept., Assiut University, Egypt 2 Electrical and Computer Engineering as average power and energy consumptions. As the design problem becomes large, exact solution takes-flow graph (DFG) executes. We define Scheduling for Low Power and Energy (SLoPE) in high-level synthesis
Geometric Integration: Numerical Solution of Differential Equations on Manifolds
Scheichl, Robert
and the solar system. Conserved quantities of a Hamiltonian system, such as energy, linear and angular momentumGeometric Integration: Numerical Solution of Differential Equations on Manifolds C.J. Budd 1 & A riches. Psalms 104:24 Since their introduction by Sir Isaac Newton, differential equations have played
Complete integration of the aligned Newman Tamburino Maxwell solutions
Liselotte De Groote; Norbert Van den Bergh
2008-04-07T23:59:59.000Z
We investigate the cylindrical class of Newman Tamburino equations in the presence of an aligned Maxwell field. After obtaining a complete integration of the field equations we look at the possible vacuum limits and we examine the symmetries of the general solution.
Integrating Mobile Agent Technology into an e-Marketplace Solution
Integrating Mobile Agent Technology into an e-Marketplace Solution - The InterMarket Marketplace. The mobile agent technology might take e-commerce trading to the next phase. Mobile agents are intelligent technology. A feasibility study, made for two existing software applications, the mobile-agent system Tracy
Solution to Quiz 4 Problem 1. (5 points) Find the improper integral ...
2012-02-18T23:59:59.000Z
Solution to Quiz 4. Problem 1. (5 points) Find the improper integral. ? +?. 4. 1 x. 3. 2 dx. Solution. By the definition of improper integral,. ? +?. 4. 1 x. 3. 2 dx =.
Numerical solutions to integral equations of the Fredholm type
Pullin, John Henry
1966-01-01T23:59:59.000Z
USED TO READ IN NECESSARY DATA AND C TRANSFER CONTROL C Il IS THE NUMBER OF POINTS USED IN THE QUADRATURE FORMULAS C A AND B ARE THE LIMITS OF INTEGRATION C ALAM IS A PARAMETER CONTAINED IN THE INTEGRAL EQUATION C XEVAL IS THE POINT AT WHICH... THE SOLUTION IS EVALUATED C NDATA IS A CONTROL USED TO COUNT THE SET OF DATA ON DIMENSION W(20)oZ&20)oALPHA(20 41& ~ BETA(20) COMMON ALPHAoBETAo NloNDATAoALAM NDATA~O 106 READ(5 105)MloNI IloBoA ALAM 105 FORMAT(312o3F10o5) DO I I=loll I READ(5 ' 103)W...
Raffray, A. René
2014-01-01T23:59:59.000Z
, assembly and maintenance, Fusion Eng. Des. (2014), http://dx.doi.org/10.1016/j.fusengdes.2014.elsevier.com/locate/fusengdes ITER blanket manifold system: Integration, assembly and maintenance Alex Martina, , George Dellopoulosb failure would prevent ITER operation a maintenance strategy has been planned. © 2014 Elsevier B.V. All
Path Integral Solution of PT-/non-PT-Symmetric and non-Hermitian Morse Potential
Nalan Kandirmaz; Ramazan Sever
2008-12-14T23:59:59.000Z
Path integral solutions are obtained for the the PT-/non-PT-Symmetric and non-Hermitian Morse Potential. Energy eigenvalues and the corresponding wave functions are obtained.
Subber, Waad, E-mail: wsubber@connect.carleton.ca; Sarkar, Abhijit, E-mail: abhijit_sarkar@carleton.ca
2014-01-15T23:59:59.000Z
Recent advances in high performance computing systems and sensing technologies motivate computational simulations with extremely high resolution models with capabilities to quantify uncertainties for credible numerical predictions. A two-level domain decomposition method is reported in this investigation to devise a linear solver for the large-scale system in the Galerkin spectral stochastic finite element method (SSFEM). In particular, a two-level scalable preconditioner is introduced in order to iteratively solve the large-scale linear system in the intrusive SSFEM using an iterative substructuring based domain decomposition solver. The implementation of the algorithm involves solving a local problem on each subdomain that constructs the local part of the preconditioner and a coarse problem that propagates information globally among the subdomains. The numerical and parallel scalabilities of the two-level preconditioner are contrasted with the previously developed one-level preconditioner for two-dimensional flow through porous media and elasticity problems with spatially varying non-Gaussian material properties. A distributed implementation of the parallel algorithm is carried out using MPI and PETSc parallel libraries. The scalabilities of the algorithm are investigated in a Linux cluster.
Bifurcations of traveling wave solutions for an integrable equation
Li Jibin [Department of Mathematics, Zhejiang Normal University, Jinhua, Zhejiang 321004 (China) and Kunming University of Science and Technology, Kunming, Yunnan 650093 (China); Qiao Zhijun [Department of Mathematics, University of Texas Pan-American, 1201 West University Drive, Edinburg, Texas 78541 (United States)
2010-04-15T23:59:59.000Z
This paper deals with the following equation m{sub t}=(1/2)(1/m{sup k}){sub xxx}-(1/2)(1/m{sup k}){sub x}, which is proposed by Z. J. Qiao [J. Math. Phys. 48, 082701 (2007)] and Qiao and Liu [Chaos, Solitons Fractals 41, 587 (2009)]. By adopting the phase analysis method of planar dynamical systems and the theory of the singular traveling wave systems to the traveling wave solutions of the equation, it is shown that for different k, the equation may have infinitely many solitary wave solutions, periodic wave solutions, kink/antikink wave solutions, cusped solitary wave solutions, and breaking loop solutions. We discuss in a detail the cases of k=-2,-(1/2),(1/2),2, and parametric representations of all possible bounded traveling wave solutions are given in the different (c,g)-parameter regions.
A Holistic Solution for Duplicate Entity Identification in Deep Web Data Integration
A Holistic Solution for Duplicate Entity Identification in Deep Web Data Integration Wei Liu 1 in deep Web data integration, the goal of duplicate entity identification is to discover the duplicate to deep Web data integration systems. That is, one duplicate entity matcher trained over two specific Web
Dual Integrated Appliances as an Energy and Safety Solution for...
America Technology Solutions for New and Existing Homes: Performance of a Heat Pump Water Heater in the Hot-Humid Climate, Windermere, Florida (Fact Sheet) Space Conditioning...
Challacombe, Matt [Los Alamos National Laboratory
2009-01-01T23:59:59.000Z
An algorithm for solution of the Time-Dependent Self-Consistent-Field (TD-SCF) equations is developed, based on dual solution channels for non-linear optimization of the Tsiper functional [J.Phys.B, 34 L401 (2001)]. This formulation poses the TD-SCF problem as two Rayleigh quotients, coupled weakly through biorthogonality. Convergence rates for the Random Phase Approximation (RPA) are found to be equivalent to the Tamm-Dancoff approximation (TDA). Moreover, the variational nature of the quotient is robust to approximation errors, allowing linear scaling solution to the bulk limit of the RPA matrix-eigenvalue and exchange operator problem for molecular wires with extended conjugation, including polyphenylene vinylene and the (4,3) nanotube.
Wavelet-based integral representation for solutions of the wave equation
M. V. Perel; M. S. Sidorenko
2008-09-12T23:59:59.000Z
An integral representation of solutions of the wave equation as a superposition of other solutions of this equation is built. The solutions from a wide class can be used as building blocks for the representation. Considerations are based on mathematical techniques of continuous wavelet analysis. The formulas obtained are justified from the point of view of distribution theory. A comparison of the results with those by G. Kaiser is carried out. Methods of obtaining physical wavelets are discussed.
Way Beyond Widgets: Delivering Integrated Lighting Design in Actionable Solutions
Myer, Michael; Richman, Eric E.; Jones, Carol C.
2008-08-17T23:59:59.000Z
Previously, energy-efficiency strategies for commercial spaces have focused on using efficient equipment without providing specific detailed instructions. Designs by experts in their fields are an energy-efficiency product in its own right. A new national program has developed interactive application-specific lighting designs for widespread use in four major commercial sectors. This paper will describe the technical basis for the solutions, energy efficiency and cost-savings methodology, and installations and measurement/verification to-date. Lighting designs have been developed for five types of retail stores (big box, small box, grocery, specialty market, and pharmacy) and are planned for the office, healthcare, and education sectors as well. Nationally known sustainable lighting designers developed the designs using high-performance commercially available products, daylighting, and lighting controls. Input and peer review was received by stakeholders, including manufacturers, architects, utilities, energy-efficiency program sponsors (EEPS), and end-users (i.e., retailers). An interactive web tool delivers the lighting solutions and analyzes anticipated energy savings using project-specific inputs. The lighting solutions were analyzed against a reference building using the space-by-space method as allowed in the Energy Standard for Buildings Except Low-Rise Residential Buildings (ASHRAE 2004) co-sponsored by the American Society of Heating, Refrigeration, and Air Conditioning Engineers (ASHRAE) and the Illuminating Engineering Society of North America (IESNA). The results showed that the design vignettes ranged from a 9% to 28% reduction in the allowed lighting power density. Detailed control strategies are offered to further reduce the actual kilowatt-hour power consumption. When used together, the lighting design vignettes and control strategies show a modeled decrease in energy consumption (kWh) by 33% to 50% below the baseline design.
Numerical solutions to integral equations of the Fredholm type
Pullin, John Henry
1966-01-01T23:59:59.000Z
%Y ) RETURN AK~SIN(X+Y) RETURN AK~EXP( ABS(X Y)) RETURN AK~(SIN&X-Y })442/&X-Y) RETURN END PROGRAM TO CALCULATE SHIFTED CHEBYSHEV POLYNOMIALS SUBROUT I NE CHES &Me X ~ TM ) DI MENS I QN TM (2D ) IF(M 1)2&3 ~ 2 2 TM(1) = I ~ IF(M 2)4e5 ~ 4 4 TM&2... FUNCTION AK(XeY AN) GO TO &)o2o3)sN 1 AK&I ~ 3 ' +X+Y RETURN 2 AK~SIN&X+Y) RETURN 3 AK~X+Y RETVRN END C THIS FUNCTION CONTAINS THE MAIN FUNCTION OF THE INTEGRAL C EQUATIONS IF IT IS ZERO WE HAVE A HOMOGENEOVS EQUATIONS FUNCTION FOFX(N ~ X) GO...
Khan, Kamran-Ahmed
2009-05-15T23:59:59.000Z
solutions within a general displacement based FE structural analyses for small deformations and uncoupled thermo-mechanical problems. A previously developed recursive-iterative algorithm for a stress-dependent hereditary integral model which was developed...
Iterative solutions of simultaneous equations
Laycock, Guyron Brantley
1962-01-01T23:59:59.000Z
( )] where 0 gi 1, 1 i - n. Recall that in the e~an- sion of a determinant by cofactors according to the elements of a given col&3an, ii its elements are replaced by the corresponding elements of another column, the result is sero ~ &hns f 121"11 + f 22F...) Rote that ll( 1''' ' ) 1 ( 1' '''n) enl(C] ) ~ ~ 1Q ) e (+] 0 ~ ~ )~n) j9 exi st s ~ appr oaches I (Ail~ ~ "tR ) then one, the Jacobian is non-zero at (+ 1, . . . , () ), It is clear that the product P+ J3 if (wi, . . . , x ) is "near enough...
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (MillionStructural Basis of5, 2014 | ReleaseUNCLASSI H E D SSlFlED BNL-25 - -finalUS EnergyJanITER
Xiao, Jie
2009-01-01T23:59:59.000Z
Two optimal monotone integral principles (equivalently for the Laplacian, two sharp iso-weighted-volume inequalities) are established through extending the first and second integral bounds of H. Weinberger for the Green functions (i.e., fundamental solutions) of uniformly elliptic equations in terms of the layer-cake formula, a one-dimensional monotone integral principle, and the isoperimetric and Jenson's inequalities with sharp constants. Surprisingly, a special setting of the first principle can be used to not only verify the low-dimensional P\\'olya conjecture for the principal eigenvalue of the Laplacian but also to characterize the geometry of the Nash inequality for a strong uniform elliptic equation.
Jordan Hristov
2011-07-26T23:59:59.000Z
Integral balance solution employing entire domain approximation and the penetration dept concept to the Stokes' first problem of a viscoelastic generalized second grade fluid has been developed. The solution has been performed by a parabolic profile with an unspecified exponent allowing optimization through minimization of the norm over the domain of the penetration depth. The closed form solution explicitly defines two dimensionless similarity variables and, responsible for the viscous and the elastic responses of the fluid to the step jump at the boundary. The solution was developed with three forms of the governing equation through its two dimensional forms (the main solution and example 1) and the dimensionless version showing various sides of the flow field and how the dimensionless groups control it: mainly the effect of the Deborah number. Numerical simulations demonstrating the effect of the various operating parameter and fluid properties on the developed flow filed have been performed.
The Fourier integral and its use in the solution of certain boundary value problems
McNutt, Wayne Eugene
1952-01-01T23:59:59.000Z
'IKE FOURIER IRTEORAL AHB ITS USE IN IEE SOLUTION OF GERTAIN BOUNDARY VALVE PRObLERS A Thesis Wayne Eugene McRutt Approved as to style and content by& E. c. a P51RQ 0 e ead of partment or tudent Advisor Kay 1958 TME FOURIRR INTEGRAL...
Two worlds, one smart card An integrated solution for physical access and logical security
Hoepman, Jaap-Henk
issued, controlling access to over 1500 buildings, fitted with in total more than 6000 smart card readers to office buildings and plants, companies these days issue their employees a (smart) card that is bothTwo worlds, one smart card An integrated solution for physical access and logical security using
Two worlds, one smart card # An integrated solution for physical access and logical security
Hoepman, Jaap-Henk
issued, controlling access to over 1500 buildings, fitted with in total more than 6000 smart card readers#ce buildings and plants, companies these days issue their employees a (smart) card that is both an identityTwo worlds, one smart card # An integrated solution for physical access and logical security using
Solutions of TEAM problems 13 and 20 using a volume integral formulation
Kettunen, L.; Forsman, K. [Tampere Univ. of Technology (Finland); Levine, D.; Gropp, W. [Argonne National Lab., IL (United States)
1994-10-01T23:59:59.000Z
Solutions for TEAM benchmark problems 13 and 20, obtained with an h-type volume integral formulation, are presented. Results computed with an increasing number of unknowns are shown in order to study the convergence of the numerical calculations. Some theoretical questions and aspects of parallelism are also highlighted.
2012-07-04T23:59:59.000Z
MA 162 - Quiz 5 (20 minutes). SOLUTIONS. The solutions I present are not necessarily the only solutions. As long as you give a correct method of solving a ...
ITER:The Future International Burning Plasma Experiment Present Status
ITER5/8/01 ITER:The Future International Burning Plasma Experiment Present Status R. Aymar, ITER/8/01 strategic objective ¥ to establish fusion energy as a real energy option for the future Ð e.g. Òcreating availability and integration of essential fusion technologies Ð test components for a future reactor Ð test
Integrability and Boundedness of Local Solutions to Singular and Degenerate Quasilinear Parabolic
O'Leary, Michael
Equations Mike O'Leary Abstract Integral and supremum estimates are proven for local solutions of de- 1 ) + c5|u|-1 + 2(x, t), AMS Classifications: 35K65, 35B45 Mike O'Leary, Department of Mathematics, Towson University, Towson, MD 21252 moleary@towson.edu #12;2 M. O'Leary (H5) 1 L p p-1 ,loc(T ), (H6) o
Matthew Bruff; Ned Godshall; Karen Evans
2011-04-30T23:59:59.000Z
This Final Scientific/ Technical Report submitted with respect to Project DE-FE0000833 titled 'An Integrated Water Treatment Technology Solution for Sustainable Water Resource Management in the Marcellus Shale' in support of final reporting requirements. This final report contains a compilation of previous reports with the most current data in order to produce one final complete document. The goal of this research was to provide an integrated approach aimed at addressing the increasing water resource challenges between natural gas production and other water stakeholders in shale gas basins. The objective was to demonstrate that the AltelaRain{reg_sign} technology could be successfully deployed in the Marcellus Shale Basin to treat frac flow-back water. That objective has been successfully met.
US ITER / ORNL
2012-03-16T23:59:59.000Z
US ITER Project Manager Ned Sauthoff, joined by Wayne Reiersen, Team Leader Magnet Systems, and Jan Berry, Team Leader Tokamak Cooling System, discuss the U.S.'s role in the ITER international collaboration.
Integrated PEV Charging Solutions and Reduced Energy for Occupant Comfort (Brochure)
Not Available
2012-01-01T23:59:59.000Z
Brochure on Vehicle Testing and Integration Facility, featuring the Vehicle Modification Facility, Vehicle Test Pad and ReCharge Integrated Demonstration System. Plug-in electric vehicles (PEVs) offer the opportunity to shift transportation energy demands from petroleum to electricity, but broad adoption will require integration with other systems. While automotive experts work to reduce the cost of PEVs, fossil fueled cars and trucks continue to burn hundreds of billions of gallons of petroleum each year - not only to get from point A to point B, but also to keep passengers comfortable with air conditioning and heat. At the National Renewable Energy Laboratory (NREL), three installations form a research laboratory known as the Vehicle Testing and Integration Facility (VTIF). At the VTIF, engineers are developing strategies to address two separate but equally crucial areas of research: meeting the demands of electric vehicle-grid integration and minimizing fuel consumption related to vehicle climate control. Part of NREL's Center for Transportation Technologies and Systems (CTTS), the VTIF is dedicated to renewable and energy efficient solutions. This facility showcases technology and systems designed to increase the viability of sustainably powered vehicles. NREL researchers instrument every class of on-road vehicle, conduct hardware and software validation for electric vehicle (EV) components and accessories, and develop analysis tools and technology for the Department of Energy, other government agencies and industry partners. Research conducted at the VTIF examines the interaction of building energy systems, utility grids, renewable energy sources and PEVs, integrating energy management solutions, and maximizing potential greenhouse gas (GHG) reduction, while smoothing the transition and reducing costs for EV owners. NREL's collaboration with automakers, charging station manufacturers, utilities and fleet operators to assess technologies using VTIF resources is designed to enable PEV communication with the smart grid and create opportunities for vehicles to play an active role in building and grid management. Ultimately, this creates value for the vehicle owner and will help renewables be deployed faster and more economically, making the U.S. transportation sector more flexible and sustainable.
Richard J. Mathar
2014-11-22T23:59:59.000Z
W. B. Jordan's conclusion that the quadruple principal value integral in problem 89-2 vanishes does not hold. The error sneaks in through a contribution of a subintegral which impedes some sign symmetry with respect to the master parameter (the Fermi radius) and which was overlooked in the published solution. In summary, the original problem of solving the quadruple integral remains unsolved.
Christman, E.A.
2010-01-01T23:59:59.000Z
NEON AND ARGON IONS: INTEGRAL YIELDS FROM FERROUS SULFATENEON AND ARGON IONS: INTEGRAL YIELDS FROM FERROUS SULFATE
Jony
2011-09-04T23:59:59.000Z
Quiz 2, Section 11. P1. Find the cosine of the angle between the vectors bbb. AB and bbb. AC, where A = (2,b1,3), B = (1,1,2),. C = (3,1,0). Solution: First, we ...
2011-09-09T23:59:59.000Z
Solution: We're looking for the presale cost of the shirt, so let x be the price of ... The sale price is $10 and we've called the presale price x, so we need to solve.
2010-11-29T23:59:59.000Z
(d) Show that Hölder's inequality is also true for the “improper” integrals described in Ex- ... Now the previous inequality is equivalent, by making x = z1/p ? 1 to.
ASYNCHRONOUS JACOBI ITERATIONS ON
Bull, Mark
ASYNCHRONOUS JACOBI ITERATIONS ON LOCAL MEMORY PARALLEL COMPUTERS A thesis submitted : : : : : : : : : : : : : : : : : : : : : : : 18 3 JacobiÂlike Iterations 20 3.1 Serial algorithms : : : : : : : : : : : : : : : : : : : : : : : : : : : 20 3.2 Parallel versions of Jacobi and GaussÂSeidel algorithms : : : : : : 22 2 #12; 3
Tetration: an iterative approach
R. Aldrovandi
2014-10-14T23:59:59.000Z
A matrix approach to continuous iteration is proposed for general formal series. It leads, in particular, to an order{to{order iteration of the exponential function, and consequently to an algorithmic approach to tetration. Lower{order approximations suggest that tetration may come to be of great interest for the description of involved dynamical systems.
Jony
sz 6, SECTION 171, T 2:30 PM. P1. Find the points in the cone 22 = x2 + y2 that are closest to the point (4, 2, 0). Solution 1: First, we note that given the point (4, ...
Koschorke, Albrecht; Musanovic, Emina
2013-01-01T23:59:59.000Z
Integration By Albrecht Koschorkeby Emina Musanovic [Integration (from Lat. integrare, “toa social unity. Social integration is distinct from systemic
Jordan Hristov
2010-12-12T23:59:59.000Z
The work presents an integral solution of the time-fractional subdiffusion through a preliminary defined profile with unknown coefficients and the concept of penetration layer well known from the heat diffusion The profile satisfies the boundary conditions imposed at the boundary of the boundary layer in a weak form that allows its coefficients to be expressed through the boundary layer depth as unique parameter describing the profile. The technique is demonstrated by a solution of a time fractional subdiffusion equation in rectilinear 1-D conditions
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey InsideMicroBooNE LArTPC SarahArea: U.S. Lower 48longEquipmentUSUS:ITER's centralUS ITER preps
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Integrated environmental degradation model for Fe-Ni-Cr alloys in irradiated aqueous solutions
Pleune, Thomas Todd, 1974-
1999-01-01T23:59:59.000Z
An integrated model has been developed to evaluate the effect of reactor flux, fluence, and other operating conditions on crack growth rates in austenitic stainless steels in boiling water reactor (BWR) environments. The ...
Extended Reaction Rate Integral as Solutions of Some General Differential Equations
D. P. Joseph; H. J. Haubold
2010-01-13T23:59:59.000Z
Here an extended form of the reaction rate probability integral, in the case of nonresonant thermonuclear reactions with the depleted tail and the right tail cut off, is considered. The reaction rate integral then can be looked upon as the inverse of the convolution of the Mellin transforms of Tsallis type statistics of nonextensive statistical mechanics and stretched exponential as well as that of superstatistics and stretched exponentials. The differential equations satisfied by the extended probability integrals are derived. The idea used is a novel one of evaluating the extended integrals in terms of some special functions and then by invoking the differential equations satisfied by these special functions. Some special cases of limiting situations are also discussed.
V. Rezania; Y. Sobouti
1998-04-27T23:59:59.000Z
The post-Newtonian approximation of general relativistic Liouville's equation is presented. Two integrals of it, generalizations of the classical energy and angular momentum, are obtained. Polytropic models are constructed as an application.
Integrated nondestructive assay solutions for plutonium measurement problems of the 21st century
Sampson, T.E.; Cremers, T.L.
1997-08-01T23:59:59.000Z
The authors describe automated and integrated NDA systems configured to measure many of the materials that will be found in the DOE complex in the dismantlement, disposition, residue stabilization, immobilization, and MOX fuel programs. These systems are typified by the ARIES (Advanced Recovery and Integrated Extraction System) nondestructive assay system which is under construction at Los Alamos to measure the outputs of a weapon component dismantlement system.
Integrated nondestructive assay solutions for plutonium measurement problems of the 21st century
Sampson, T.E.; Cremers, T.L.
1997-12-01T23:59:59.000Z
The authors describe automated and integrated nondestructive assay (NDA) systems configured to measure many of the materials that will be found in the Department of Energy complex in the dismantlement, disposition, residue stabilization, immobilization, and mixed oxide fuel programs. These systems are typified by the Advanced Recovery and Integrated Extraction System NDA system which is under construction at Los Alamos National Laboratory to measure the outputs of a weapon component dismantlement system.
Benchmarking ICRF simulations for ITER
R. V. Budny, L. Berry, R. Bilato, P. Bonoli, M. Brambilla, R.J. Dumont, A. Fukuyama, R. Harvey, E.F. Jaeger, E. Lerche, C.K. Phillips, V. Vdovin, J. Wright, and members of the ITPA-IOS
2010-09-28T23:59:59.000Z
Abstract Benchmarking of full-wave solvers for ICRF simulations is performed using plasma profiles and equilibria obtained from integrated self-consistent modeling predictions of four ITER plasmas. One is for a high performance baseline (5.3 T, 15 MA) DT H-mode plasma. The others are for half-field, half-current plasmas of interest for the pre-activation phase with bulk plasma ion species being either hydrogen or He4. The predicted profiles are used by seven groups to predict the ICRF electromagnetic fields and heating profiles. Approximate agreement is achieved for the predicted heating power partitions for the DT and He4 cases. Profiles of the heating powers and electromagnetic fields are compared.
Dr. Norbert Holtkamp
2010-01-08T23:59:59.000Z
ITER (in Latin ?the way?) is designed to demonstrate the scientific and technological feasibility of fusion energy. Fusion is the process by which two light atomic nuclei combine to form a heavier over one and thus release energy. In the fusion process two isotopes of hydrogen ? deuterium and tritium ? fuse together to form a helium atom and a neutron. Thus fusion could provide large scale energy production without greenhouse effects; essentially limitless fuel would be available all over the world. The principal goals of ITER are to generate 500 megawatts of fusion power for periods of 300 to 500 seconds with a fusion power multiplication factor, Q, of at least 10. Q ? 10 (input power 50 MW / output power 500 MW). The ITER Organization was officially established in Cadarache, France, on 24 October 2007. The seven members engaged in the project ? China, the European Union, India, Japan, Korea, Russia and the United States ? represent more than half the world?s population. The costs for ITER are shared by the seven members. The cost for the construction will be approximately 5.5 billion Euros, a similar amount is foreseen for the twenty-year phase of operation and the subsequent decommissioning.
Regions of influence for two iterative methods
Leifeste, Arlee Ross
1966-01-01T23:59:59.000Z
Subject Mathematics REGIONS OF INFLUENCE FOR TWO ITERATIVE METHODS A Thesis By ARLEE ROSS LEIFESTE Approved as to style and content by: (Chairman of Committee) (Head of Department) (Member) (N b )' January 1966 ACKNOWLEDGMENT The author wishes... purpose of the present discussion is to initiate a study of the "regions of influence" of the various solutions of the simul- taneous equations involved. Let the simultaneous functions be denoted and let ( y , y , , y 1 be a point of n...
The Fourier integral and its use in the solution of certain boundary value problems
McNutt, Wayne Eugene
1952-01-01T23:59:59.000Z
. & . e s, e . . ~ ~ ~ ~ 5 II. Definitions and Stated Theorerns. ~ ~ ~ ~ . ~ ~. . . 3 III. A Proof for the Convergence of the Fourier Integral. 6 IV, Different Forms of the Fourier Integral, . . . . , . 14 V. Fourier and Laplace Transforrnations... & b. 2. xa(a, b) means a & x ~ b. d 3. = is read "is by def1nition". 4. lf +'' kl ) y dy-1 y y+'"+l, 5. L [ f (t) I is read "the Laplace Transform of f (t)". 6. L ( F(s) ) is read "the inverse Laplace Transform of F(s)". Il. IIefinitions...
Pike, Ralph W.
and Greenhouse Gas Management Solutions Thomas A Hertwiga , Aimin Xub , Ralph W Pikeb , F. Carl Knopfb , Jack R, Beaumont, TX 77710, hopperjr@hal.lamar.edu, yawscl@hal.lamar.edu Key words; Energy Conservation, Greenhouse from greenhouse gas emissions. It uses sequential layer analysis to evaluates each plant's current
Johnson, L.C.; Barnes, C.W.; Batistoni, P. [ITER San Diego Joint Work Site, La Jolla, CA (United States)] [and others
1998-12-31T23:59:59.000Z
Neutron cameras with horizontal and vertical views have been designed for ITER, based on systems used on JET and TFTR. The cameras consist of fan-shaped arrays of collimated flight tubes, with suitably chosen detectors situated outside the biological shield. The sight lines view the ITER plasma through slots in the shield blanket and penetrate the vacuum vessel, cryostat, and biological shield through stainless steel windows. This paper analyzes the expected performance of several neutron camera arrangements for ITER. In addition to the reference designs, the authors examine proposed compact cameras, in which neutron fluxes are inferred from {sup 16}N decay gammas in dedicated flowing water loops, and conventional cameras with fewer sight lines and more limited fields of view than in the reference designs. It is shown that the spatial sampling provided by the reference designs is sufficient to satisfy target measurement requirements and that some reduction in field of view may be permissible. The accuracy of measurements with {sup 16}N-based compact cameras is not yet established, and they fail to satisfy requirements for parameter range and time resolution by large margins.
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) | SciTech Connect Journal Article: X-rayContractforCentersSiteCenter Director Meyer, Thomas UniversityUS KeyUS ITER
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey InsideMicroBooNE LArTPC SarahArea: U.S. Lower 48longEquipmentUSUS:ITER'sNeutronics atNew
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AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey InsideMicroBooNE LArTPC SarahArea: U.S. Lower 48longEquipmentUSUS:ITER'sNeutronics
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey InsideMicroBooNE LArTPC SarahArea: U.S. Lower 48longEquipmentUSUS:ITER'sNeutronicsUS
NUMERICAL SOLUTION OF TWO-PHASE FLOW PROBLEMS
2008-08-23T23:59:59.000Z
So 1 u t ion b y a1 terna ting-d irec tio n iteration. We consider now the solution of the simultaneous difference equations by an alternating-direction iteration.
Chen, Wei-Ren [ORNL; Do, Changwoo [ORNL; Hong, Kunlun [ORNL; Liu, Yun [National Institute of Standards and Technology (NIST); Porcar, L. [National Institute of Standards and Technology (NIST); Shew, Chwen-Yang [City University of New York (CUNY); Smith, Greg [ORNL
2012-01-01T23:59:59.000Z
We present small angle neutron scattering (SANS) measurements of deuterium oxide (D2O) solutions of linear and star sodium poly(styrene sulfonate) (NaPSS) as a function of polyelectrolyte concentration. Emphasis is on understanding the dependence of their SANS coherent scattering cross section I(Q) on the molecular architecture of single polyelectrolyte. The key finding is that for a given concentration, star polyelectrolytes exhibit more pronounced characteristic peaks in I(Q), and the position of the first peak occurs at a smaller Q compared to their linear counterparts. Based on a model of integral equation theory, we first compare the SANS experimental I(Q) of salt free polyelectrolyte solutions with that predicted theoretically. Having seen their satisfactory qualitative agreement, the dependence of counterion association behavior on polyelectrolyte geometry and concentration is further explored. Our predictions reveal that the ionic environment of polyelectrolyte exhibits a strong dependence on polyelectrolyte geometry at lower polyelectrolyte concentration. However, when both linear and star polyelectrolytes exceed their overlap concentrations, the spatial distribution of counterion is found to be essentially insensitive to polyelectrolyte geometry due to the steric effect.
Combined Field Integral Equation Based Theory of Characteristic Mode
Qi I. Dai; Qin S. Liu; Hui Gan; Weng Cho Chew
2015-03-04T23:59:59.000Z
Conventional electric field integral equation based theory is susceptible to the spurious internal resonance problem when the characteristic modes of closed perfectly conducting objects are computed iteratively. In this paper, we present a combined field integral equation based theory to remove the difficulty of internal resonances in characteristic mode analysis. The electric and magnetic field integral operators are shown to share a common set of non-trivial characteristic pairs (values and modes), leading to a generalized eigenvalue problem which is immune to the internal resonance corruption. Numerical results are presented to validate the proposed formulation. This work may offer efficient solutions to characteristic mode analysis which involves electrically large closed surfaces.
An exact Lagrangian integral for the Newtonian gravitational field strength
Thomas Buchert
2006-01-23T23:59:59.000Z
An exact expression for the gravitational field strength in a self-gravitating dust continuum is derived within the Lagrangian picture of continuum mechanics. From the Euler-Newton system a transport equation for the gravitational field strength is formulated and then integrated along trajectories of continuum elements. The resulting integral solves one of the Lagrangian equations of the corresponding Lagrange-Newton system in general. Relations to known exact solutions without symmetry in Newtonian gravity are discussed. The presented integral may be employed to access the non-perturbative regime of structure formation in Newtonian cosmology, and to apply iterative Lagrangian schemes to solve the Lagrange-Newton system.
US ITER Project Providing a Facility for
US ITER Project Providing a Facility for Burning Plasma Research Ned Sauthoff Project Manager, US to position the US for Burning Plasma Research #12;U.S. ITER / Sauthoff Slide 2 Structure of the Talk... ITER
A spatial multigrid iterative method for two-dimensional discrete-ordinates transport problems
Lansrud, Brian David
2005-08-29T23:59:59.000Z
by Eq. (1.21) could be continued until the solution converges. Until convergence is reached, each iterate contains some iteration error. One measure of that error is the ?residual,? which is defined as: () ( ) ( )nLR nll lll. (1.22) The residual...
A E Costley ITER Diagnostics, 21st IAEA of 5 slides
shielding, Tritium containment, vacuum integrity, RH compatibility. #12;A E Costley ITER Diagnostics, 21st distinct measurement systems in total. #12;A E Costley ITER Diagnostics, 21st IAEA 9 of 5 slides HANDLING, Germany THE DESIGN AND IMPLEMENTATIONTHE DESIGN AND IMPLEMENTATION OF DIAGNOSTIC SYSTEMS ON ITEROF
Multivariate discriminant and iterated resultant
Jingjun Han
2015-07-22T23:59:59.000Z
In this paper, we study the relationship between iterated resultant and multivariate discriminant. We show that, for generic form $f(X_n)$ with even degree $d$, if the polynomial is squarefreed after each iteration, the multivariate discriminant $\\Delta(f)$ is a factor of the squarefreed iterated resultant. In fact, we find a factor $Hp(f,[x_1,\\ldots,x_n])$ of the squarefreed iterated resultant, and prove that the multivariate discriminant $\\Delta(f)$ is a factor of $Hp(f,[x_1,\\ldots,x_n])$. Moreover, we conjecture that $Hp(f,[x_1,\\ldots,x_n])=\\Delta(f)$ holds for generic form $f$, and show that it is true for generic trivariate form $f(x,y,z)$.
Bragg x-ray survey spectrometer for ITER
Varshney, S. K.; Jakhar, S. [ITER-India, Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428 (India); Barnsley, R. [ITER Organization, Route de Vinon sur Verdon, 13115 Saint Paul Lez Durance (France); O'Mullane, M. G. [Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom)
2012-10-15T23:59:59.000Z
Several potential impurity ions in the ITER plasmas will lead to loss of confined energy through line and continuum emission. For real time monitoring of impurities, a seven channel Bragg x-ray spectrometer (XRCS survey) is considered. This paper presents design and analysis of the spectrometer, including x-ray tracing by the Shadow-XOP code, sensitivity calculations for reference H-mode plasma and neutronics assessment. The XRCS survey performance analysis shows that the ITER measurement requirements of impurity monitoring in 10 ms integration time at the minimum levels for low-Z to high-Z impurity ions can largely be met.
Trcka, Marija; L.M. Hensena, Jan; Wetter, Michael
2010-06-21T23:59:59.000Z
Integrated performance simulation of buildings and heating, ventilation and airconditioning (HVAC) systems can help reducing energy consumption and increasing occupant comfort. However, no single building performance simulation (BPS) tool offers suffcient capabilities and flexibilities to analyze integrated building systems and to enable rapid prototyping of innovative building and system technologies. One way to alleviate this problem is to use co-simulation to integrate different BPS tools. Co-simulation approach represents a particular case of simulation scenario where at least two simulators solve coupled differential-algebraic systems of equations and exchange data that couples these equations during the time integration. This article analyzes how co-simulation influences consistency, stability and accuracy of the numerical approximation to the solution. Consistency and zero-stability are studied for a general class of the problem, while a detailed consistency and absolute stability analysis is given for a simple two-body problem. Since the accuracy of the numerical approximation to the solution is reduced in co-simulation, the article concludes by discussing ways for how to improve accuracy.
Multiple solutions of CCD equations for PPP model of benzene
Podeszwa, R; Jankowski, K; Rubiniec, K; Podeszwa, Rafa{\\l}; Stolarczyk, Leszek Z.; Jankowski, Karol; Rubiniec, Krzysztof
2002-01-01T23:59:59.000Z
To gain some insight into the structure and physical significance of the multiple solutions to the coupled-cluster doubles (CCD) equations corresponding to the Pariser-Parr-Pople (PPP) model of cyclic polyenes, complete solutions to the CCD equations for the A^{-}_{1g} states of benzene are obtained by means of the homotopy method. By varying the value of the resonance integral beta from -5.0 eV to -0.5 eV, we cover the so-called weakly, moderately, and strongly correlated regimes of the model. For each value of beta 230 CCD solutions are obtained. It turned out, however, that only for a few solutions a correspondence with some physical states can be established. It has also been demonstrated that, unlike for the standard methods of solving CCD equations, some of the multiple solutions to the CCD equations can be attained by means of the iterative process based on Pulay's direct inversion in the iterative subspace (DIIS) approach.
Famenini, Shaya
2012-01-01T23:59:59.000Z
In this thesis, the first demonstration of the full integration of 1.55[mu]m InGaAs/InP edge emitting platelet laser diodes with SiON/SiO2 dielectric waveguides on a silicon substrate is presented. Small footprint laser ...
/Research Plans 3. Basic Research in support of ITER · Experimental and Theoretical Plasma Research · R
The roadmap to magnetic confinement fusion Cutaway of the ITER tokamak. ( ITER)
Hampshire, Damian
The roadmap to magnetic confinement fusion Cutaway of the ITER tokamak. (© ITER) There are two ways breeding concepts [8] . Roadmap beyond ITER The ITER project has mapped out a road map to a commercial is the most promising for power generation (Table 2) [9] . #12;Table 2. "Fast track" fusion roadmap Facility
Gruenberger, Michael; Alberts, Rudi; Smedley, Damian; Swertz, Morris A; Schofield, Paul; Consortium, Casimir; Schughart, Klaus
2010-01-22T23:59:59.000Z
functional genomics, we consulted the biologist user community and implemented solutions to two user-defined use-cases. Results We organised workshops, meetings and used a questionnaire to identify the needs of biologist database users in mouse functional...
Liu, Fang-Yu, S.M. Massachusetts Institute of Technology
2014-01-01T23:59:59.000Z
This thesis investigates microgrid control stability with respect to thermodynamics behaviors of generation and demand. First, a new integrated microgrid model is introduced. This model consists of a combined cycle power ...
Efficient Solution of the Simplified PN Equations
Hamilton, Steven P [ORNL; Evans, Thomas M [ORNL
2015-01-01T23:59:59.000Z
In this paper we show new solver strategies for the multigroup SPN equations for nuclear reactor analysis. By forming the complete matrix over space, moments, and energy a robust set of solution strategies may be applied. Power iteration, shifted power iteration, Rayleigh quotient iteration, Arnoldi's method, and a generalized Davidson method, each using algebraic and physics-based multigrid preconditioners, have been compared on C5G7 MOX test problem as well as an operational PWR model. Our results show that the most ecient approach is the generalized Davidson method, that is 30{40 times faster than traditional power iteration and 6{10 times faster than Arnoldi's method.
Iterative modelling, a new approach to the inversion of 1-D seismograms
Raskin, Greg Steven
1987-01-01T23:59:59.000Z
by correcting the field trace. The plane wave impulse response is decayed by a factor of E" (which need only be approx- imately correct). This corrected impulse response approximates a point source impulse response but neglects differential decay between... schemes . 12 IV ITERATIVE MODELI. LNG 15 A. An iterative modelling procedure B. The initial model C. Smoothing the solution vector D. Parameter removal E. Residual error analysis as a means of parauseter addition . F. Reset ting the parameter...
Overview of Recent Developments in Pellet Injection for ITER
Combs, Stephen Kirk [ORNL; Baylor, Larry R [ORNL; Meitner, Steven J [ORNL; Caughman, John B [ORNL; Rasmussen, David A [ORNL; Maruyama, So [ITER Organization, Cadarache, France
2012-01-01T23:59:59.000Z
Pellet injection is the primary fueling technique planned for core fueling of ITER burning plasmas. Also, the injection of relatively small pellets to purposely trigger rapid small edge localized modes (ELMs) has been proposed as a possible solution to the heat flux damage from larger natural ELMs likely to be an issue on the ITER divertor surfaces. The ITER pellet injection system is designed to inject pellets into the plasma through both inner and outer wall guide tubes. The inner wall guide tubes will provide high throughput pellet fueling while the outerwall guide tubes will be used primarily to trigger ELMs at a high frequency (>15 Hz). The pellet fueling rate ofeach injector is to be up to 120 Pa-m3/s, which will require the formation of solid D-T at a volumetric rate of ~1500 mm3/s. Two injectors are to be provided for ITER at the startup with a provision for up to six injectorsduring the D-T phase. The required throughput of each injector is greater than that of any injector built to date, and a novel twin-screw continuous extrusion system is being developed to meet the challenging design parameters. Status of the development activities will be presented, highlighting recent progress.
D. Mundy UKAIS PhD Consortium 2003. Providing a Secure Solution For The Integration Of Electronic
Kent, University of
for the patient on a paper prescription form. The health care provider signs this form by hand. The patient can Prescription Transfer Within The United Kingdom National Health Service D.P.Mundy Abstract This paper provides could be integrated successfully into the UK National Health Service (NHS), was developed. The described
A weighted iterative algorithm for neuromagnetic imaging
Gorodnitsky, I. (Los Alamos National Lab., NM (United States) California Univ., San Diego, La Jolla, CA (United States)); George, J.S.; Schlitt, H.A.; Lewis, P.S. (Los Alamos National Lab., NM (United States))
1992-01-01T23:59:59.000Z
The goal of neuromagnetic source reconstruction is high resolution 3-D mapping of the current distribution within the brain. However, the neuromagnetic inverse problem is ill-posed and typically underdetermined. The Moore-Penrose pseudoinverse provides a linear algebraic inverse calculation that simultaneously minimizes chisquare and the Euclidean norm of the component currents. Such minimum norm'' reconstructions tend to produce diffuse and superficial current distributions because voxels nearer the sensor array can account for more power in the data with less current than deeper voxels. We describe an algorithm that overcomes the bias of minimum norm procedures toward superficial solutions by using weights chosen to compensate for the distance dependence of magnetic signal strength. We also apply a Bayesian weighting strategy in an iterative pseudoinverse computation, to address the bias of the linear estimator procedure toward diffuse solutions. This strategy produces a progressively more focal current distribution while accomodating distributed current sources, and appears to effectively reduce the problems associated with the under-determined linear system.
A weighted iterative algorithm for neuromagnetic imaging
Gorodnitsky, I. [Los Alamos National Lab., NM (United States)]|[California Univ., San Diego, La Jolla, CA (United States); George, J.S.; Schlitt, H.A.; Lewis, P.S. [Los Alamos National Lab., NM (United States)
1992-09-01T23:59:59.000Z
The goal of neuromagnetic source reconstruction is high resolution 3-D mapping of the current distribution within the brain. However, the neuromagnetic inverse problem is ill-posed and typically underdetermined. The Moore-Penrose pseudoinverse provides a linear algebraic inverse calculation that simultaneously minimizes chisquare and the Euclidean norm of the component currents. Such ``minimum norm`` reconstructions tend to produce diffuse and superficial current distributions because voxels nearer the sensor array can account for more power in the data with less current than deeper voxels. We describe an algorithm that overcomes the bias of minimum norm procedures toward superficial solutions by using weights chosen to compensate for the distance dependence of magnetic signal strength. We also apply a Bayesian weighting strategy in an iterative pseudoinverse computation, to address the bias of the linear estimator procedure toward diffuse solutions. This strategy produces a progressively more focal current distribution while accomodating distributed current sources, and appears to effectively reduce the problems associated with the under-determined linear system.
Iterative Entanglement Distillation: Approaching full Elimination of Decoherence
Boris Hage; Aiko Samblowski; James DiGuglielmo; Jaromír Fiurášek; Roman Schnabel
2010-07-09T23:59:59.000Z
The distribution and processing of quantum entanglement form the basis of quantum communication and quantum computing. The realization of the two is difficult because quantum information inherently has a high susceptibility to decoherence, i.e. to uncontrollable information loss to the environment. For entanglement distribution, a proposed solution to this problem is capable of fully eliminating decoherence; namely iterative entanglement distillation. This approach builds on a large number of distillation steps each of which extracts a number of weakly decohered entangled states from a larger number of strongly decohered states. Here, for the first time, we experimentally demonstrate iterative distillation of entanglement. Already distilled entangled states were further improved in a second distillation step and also made available for subsequent steps.Our experiment displays the realization of the building blocks required for an entanglement distillation scheme that can fully eliminate decoherence.
ITER | Princeton Plasma Physics Lab
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirt DocumentationSitesWeather6Environmental1GrandsonVisitingIBEX satelliteIT Capital PlanningITER
Princeton Plasma Physics Lab - ITER
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (Million Cubic Feet)sets safetyInitiativesreactor-design The design of devices thatiter ITER is a
Research at ITER towards DEMO: Specific reactor diagnostic studies to be carried out on ITER
Krasilnikov, A. V.; Kaschuck, Y. A.; Vershkov, V. A.; Petrov, A. A.; Petrov, V. G.; Tugarinov, S. N. [Institution Project center ITER, Moscow (Russian Federation)
2014-08-21T23:59:59.000Z
In ITER diagnostics will operate in the very hard radiation environment of fusion reactor. Extensive technology studies are carried out during development of the ITER diagnostics and procedures of their calibration and remote handling. Results of these studies and practical application of the developed diagnostics on ITER will provide the direct input to DEMO diagnostic development. The list of DEMO measurement requirements and diagnostics will be determined during ITER experiments on the bases of ITER plasma physics results and success of particular diagnostic application in reactor-like ITER plasma. Majority of ITER diagnostic already passed the conceptual design phase and represent the state of the art in fusion plasma diagnostic development. The number of related to DEMO results of ITER diagnostic studies such as design and prototype manufacture of: neutron and ?–ray diagnostics, neutral particle analyzers, optical spectroscopy including first mirror protection and cleaning technics, reflectometry, refractometry, tritium retention measurements etc. are discussed.
Iterative Solution of Elliptic Equations with a Small Parameter
Segatti, Antonio
of thin structures, e.g. beams, plates and shells. All of the above examples share the characteristic. Equations of the type (1) are discretized using finite-difference or finite- element methods giving rise the properties of the operators Li and the vectors x and b describe the unknown u and the load f with respect
Iterative solution of ordinary differential equations with polynomial coefficients
Forehand, Jimmie Charles Rhea
1965-01-01T23:59:59.000Z
+ Z b K), (s=2, . . . , r). s ns'n 1 sjj' Given r, the number of 'substitutions" into f, the parameters R, a and s s b are to be determined to obtain an expression for y I which would sj n+1 agree with a Taylor's expansion of y(x ) up to terms... are one-step methods; that is, only the value of y must be known to obtain y from f(x, y). This method n n+1 . 27 consists in setting up y with undetermined parameters as follows: n+1 r n+1 n T s s s=l (1. 1) K =hf(x, y ) 1 n' n s-1 K =hf(x+a h, y...
iterative solution of augmented systems arising in interior methods
2005-09-04T23:59:59.000Z
SE-100 44 Stockholm, Sweden (andersf@kth.se). Research supported by the Swedish Research. Council (VR). †Department of Mathematics, University of ...
Stabilized finite element methods with fast iterative solution ...
2003-04-11T23:59:59.000Z
Computer methods in applied mechanics and engineering. Stabilized finite ... Department of Mathemutics, Purdue Universi@, 1395 Mathematical Science ...
ITER site contest counts down Junichi Miura
Thermonuclear Experimental Reactor (ITER), an international project to use nuclear fusion energy for electric on a site for the project. The ITER project envisions using thermonuclear fusion to generate huge amounts heavy hydrogen and tritium used for fuel in the fusion reaction are heated in a vacuum receptacle at 100
ITER Project Status Fusion Energy Sciences
to capped value) ORNL 100% Tokamak Cooling Water System PPPL 75% Steady State Electrical Network PPPL 14 Project Office April 9, 2014 #12;Major Progress: Construction Site 04/09/14 FESAC/Sauthoff 2 Photo: ITER Organization · September 2013 #12;Major Progress: ITER Headquarters Building 04/09/14 FESAC/Sauthoff 3 #12
ITER --"INTERNATIONAL THERMONUCLEAR EXPERIMENTAL RESEARCH PROGRAM".
ITER -- "INTERNATIONAL THERMONUCLEAR EXPERIMENTAL RESEARCH PROGRAM". ORGANIZATION TO DIRECT WORLD plasmas and thermonuclear burn processes (cost -$1.5-36)2. (2) An expanded, more ambitious international Thermonuclear Experimental Research Program" by L. J. Perkins #12;NORMAL-CONDUCTING COPPER OPTIONS FOR THE ITER
Simulations of plasma behavior during pellet injection in ITER
Klaywittaphat, P., E-mail: thawatchai@siit.tu.ac.th; Onjun, T. [Thammasat University, School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology (Thailand)
2012-06-15T23:59:59.000Z
Plasma behavior during pellet injection in ITER is investigated using a 1.5D BALDUR integrated predictive modeling code. In these simulations, the pellet ablation is described using the neutral gas shielding (NGS) model developed by Parks and Turnbull [Phys. Fluids 21, 1735 (1978)]. The NGS pellet ablation model that includes the {nabla}B drift effect is coupled with a plasma core transport model, which is a combination of an MMM95 anomalous transport model and an NCLASS neoclassical transport model. The combination of core transport models, together with pellet model, is used to simulate the time evolution of plasma current, ion and electron temperatures, and density profiles for ITER standard type-I ELMy H-mode discharges during the pellet injection. It is found that the injection of pellet can result in either enhancement or degradation of plasma performance. The {nabla}B drift effect on the pellet deposition is very strong in ITER. The plasma density with high field side pellets, which favorable with the {nabla}B drift effect, is much higher and pellet can penetrate much deeper than that with low field side pellets.
S. Pomp; U. Tippawan
2006-08-25T23:59:59.000Z
A new method for correcting charged-particle spectra for thick target effects is described. Starting with a trial function, inverse response functions are found by an iterative procedure. The variances corresponding to the measured spectrum are treated similiarly and in parallel. Oscillations of the solution are avoided by rebinning the data to finer bins during a correction iteration and back to the original or wider binning after each iteration. This thick-target correction method has been used for data obtained with the MEDLEY facility at the The Svedberg Laboratory, Uppsala, Sweden, and is here presented in detail and demonstrated for two test cases.
Iterative approach to the characteristic time for chemical reactions of type A + B ! C + D
R. Aldrovandi
2013-10-13T23:59:59.000Z
The analytic solution for the kinetic description of binary reactions can be seen as the continuum version of a basic discrete iterate mapping. This fact allows a clear definition of the reaction characteristic time which takes the backward effect into account.
Dayal, Kaushik
coupling a b s t r a c t We present an iterative method for the solution of the exterior all-space the device over all space, thus leading to an exterior electrostatic problem. In addition to this complexity in revised form 16 June 2011 Accepted 4 July 2011 Available online 20 July 2011 Keywords: Exterior
Iterative Algorithms for Nash Equilibrium of An Extended OSNR Game Yan Pan, Lacra Pavel
Pavel, Lacra
Iterative Algorithms for Nash Equilibrium of An Extended OSNR Game Yan Pan, Lacra Pavel Department in optical net- works. Based on the extended OSNR Nash game formu- lation that includes power capacity constraints in [10], the Nash equilibrium (NE) solution is analytically intractable and highly nonlinear. We
ITER Ion Cyclotron Heating and Fueling Systems
Rasmussen, D.A. [Oak Ridge National Laboratory (United States); Baylor, L.R. [Oak Ridge National Laboratory (United States); Combs, S.K. [Oak Ridge National Laboratory (United States); Fredd, E. [Princeton Plasma Physics Laboratory (United States); Goulding, R.H. [Oak Ridge National Laboratory (United States); Hosea, J. [Princeton Plasma Physics Laboratory (United States); Swain, D.W. [Oak Ridge National Laboratory (United States)
2005-04-15T23:59:59.000Z
The ITER burning plasma and advanced operating regimes require robust and reliable heating and current drive and fueling systems. The ITER design documents describe the requirements and reference designs for the ion cyclotron and pellet fueling systems. Development and testing programs are required to optimize, validate and qualify these systems for installation on ITER.The ITER ion cyclotron system offers significant technology challenges. The antenna must operate in a nuclear environment and withstand heat loads and disruption forces beyond present-day designs. It must operate for long pulse lengths and be highly reliable, delivering power to a plasma load with properties that will change throughout the discharge. The ITER ion cyclotron system consists of one eight-strap antenna, eight rf sources (20 MW, 35-65 MHz), associated high-voltage DC power supplies, transmission lines and matching and decoupling components.The ITER fueling system consists of a gas injection system and multiple pellet injectors for edge fueling and deep core fueling. Pellet injection will be the primary ITER fuel delivery system. The fueling requirements will require significant extensions in pellet injector pulse length ({approx}3000 s), throughput (400 torr-L/s,) and reliability. The proposed design is based on a centrifuge accelerator fed by a continuous screw extruder. Inner wall pellet injection with the use of curved guide tubes will be utilized for deep fueling.
ITER UltraScaleScientific Joint Dark Energy Mission ComputingCapability
#12;ITER UltraScaleScientific Joint Dark Energy Mission ComputingCapability Linac Coherent Light eRHIC Fusion Energy Contingency Source Upgrade HFIR Second Cold Source Integrated Beam Experiment IntroductionIntroductionIntroductionIntroductionIntroduction 8 Prioritization Process 9 A Benchmark
Damage to nearby divertor components of ITER-like devices during giant ELMs and disruptions
Harilal, S. S.
Damage to nearby divertor components of ITER-like devices during giant ELMs and disruptions. Fusion 50 (2010) 115004 (7pp) doi:10.1088/0029-5515/50/11/115004 Damage to nearby divertor components. The simulation results of the integrated modelling indicate a significant potential damage of the divertor nearby
work is at NEWT for cabling the superconducting strand and HPM for integration (jacket assembly; cable shown in turn-over frame at HPM #12;FY 2013 US Achievement: Completion of Toroidal Field Strand 9
EQUILIBRIUM RECONSTRUCTION ITERATION FLOW-CHART
EQUILIBRIUM RECONSTRUCTION ITERATION FLOW-CHART SUME AND 0 n GET 1 AND C0 j GET J1 AND 1 n GET 2 the total stored (kinetic + magnetic) energy density #12;TYPICAL FIELD CONFIGURATIONS acuum Field Low Beta
Michel Claessens michel.claessens@iter.org
on the manufacturing of critical components, were among the important issues discussed at the eighth meeting. Photos of the Council Meeting can be found at: http://www.iter.org/gallery/pr_2011_06_ic8 Additional
Optical dumps for H-alpha and visible spectroscopy in ITER
Andreenko, E. N.; Alekseev, A. G.; Gorshkov, A. V.; Orlovskiy, I. I. [NRC Kurchatov Institute, 123182 Moscow (Russian Federation)
2014-08-21T23:59:59.000Z
High-reflective Beryllium cover of ITER first wall (R?30–60%) causes remarkable increase of divertor stray light component (DSL). Optical dumps are well-known solution for DSL attenuation. In this work few types of optical dumps have been examined both by modeling and experimental studies. Taking into account the limitations, induced by ITER first wall design, OD optimized design has been proposed which could decrease divertor stray light component by 10..100 times depending on incidence angle of light.
Electromagnetic Analysis For The Design Of ITER Diagnostic Port Plugs During Plasma Disruptions
Zhai, Y
2014-03-03T23:59:59.000Z
ITER diagnostic port plugs perform many functions including structural support of diagnostic systems under high electromagnetic loads while allowing for diagnostic access to plasma. The design of diagnotic equatorial port plugs (EPP) are largely driven by electromagnetic loads and associate response of EPP structure during plasma disruptions and VDEs. This paper summarizes results of transient electromagnetic analysis using Opera 3d in support of the design activities for ITER diagnostic EPP. A complete distribution of disruption loads on the Diagnostic First Walls (DFWs). Diagnostic Shield Modules (DSMs) and the EPP structure, as well as impact on the system design integration due to electrical contact among various EPP structural components are discussed.
Augmented Iterations Integrating Neural Activity in Evolutionary Computation for Design
Boyer, Edmond
, 2011) or the expansion of domotic technologies and human-machine cooperations by controlling external
Hyperplane arrangements, local system homology and iterated integrals
Kohno, Toshitake
. The purpose of this article is to review developments concern- ing the homology of a local system0 simplex spanned by the vertices vjk , 0 k p. This simplex defined for Fj0
Parallel computation of multigroup reactivity coefficient using iterative method
Susmikanti, Mike [Center for Development of Nuclear Informatics, National Nuclear Energy Agency of Indonesia PUSPIPTEK Area, Tangerang (Indonesia)] [Center for Development of Nuclear Informatics, National Nuclear Energy Agency of Indonesia PUSPIPTEK Area, Tangerang (Indonesia); Dewayatna, Winter [Center for Nuclear Fuel Technology, National Nuclear Energy Agency of Indonesia PUSPIPTEK Area, Tangerang (Indonesia)] [Center for Nuclear Fuel Technology, National Nuclear Energy Agency of Indonesia PUSPIPTEK Area, Tangerang (Indonesia)
2013-09-09T23:59:59.000Z
One of the research activities to support the commercial radioisotope production program is a safety research target irradiation FPM (Fission Product Molybdenum). FPM targets form a tube made of stainless steel in which the nuclear degrees of superimposed high-enriched uranium. FPM irradiation tube is intended to obtain fission. The fission material widely used in the form of kits in the world of nuclear medicine. Irradiation FPM tube reactor core would interfere with performance. One of the disorders comes from changes in flux or reactivity. It is necessary to study a method for calculating safety terrace ongoing configuration changes during the life of the reactor, making the code faster became an absolute necessity. Neutron safety margin for the research reactor can be reused without modification to the calculation of the reactivity of the reactor, so that is an advantage of using perturbation method. The criticality and flux in multigroup diffusion model was calculate at various irradiation positions in some uranium content. This model has a complex computation. Several parallel algorithms with iterative method have been developed for the sparse and big matrix solution. The Black-Red Gauss Seidel Iteration and the power iteration parallel method can be used to solve multigroup diffusion equation system and calculated the criticality and reactivity coeficient. This research was developed code for reactivity calculation which used one of safety analysis with parallel processing. It can be done more quickly and efficiently by utilizing the parallel processing in the multicore computer. This code was applied for the safety limits calculation of irradiated targets FPM with increment Uranium.
Ulrickson, M.A. [ed.] [Sandia National Labs., Albuquerque, NM (United States); Manly, W.D. [Oak Ridge National Lab., TN (United States); Dombrowski, D.E. [Brush Wellman, Inc., Cleveland, OH (United States)] [and others
1995-08-01T23:59:59.000Z
Beryllium because of its low atomic number and high thermal conductivity, is a candidate for both ITER first wall and divertor surfaces. This study addresses the following: why beryllium; design requirements for the ITER divertor; beryllium supply and unirradiated physical/mechanical property database; effects of irradiation on beryllium properties; tritium issues; beryllium health and safety; beryllium-coolant interactions and safety; thermal and mechanical tests; plasma erosion of beryllium; recommended beryllium grades for ITER plasma facing components; proposed manufacturing methods to produce beryllium parts for ITER; emerging beryllium materials; proposed inspection and maintenance techniques for beryllium components and coatings; time table and costs; and the importance of integrating materials and manufacturing personnel with designers.
US ITER Project Oak Ridge National Laboratory UT-Battelle, LLC
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
US ITER Project Oak Ridge National Laboratory UT-Battelle, LLC US ITER Project Advisory Board Chief Scientist, Chuck Greenfield US ITER Magnets Technical Advisory Board Nuclear...
AIR: fused Analytical and Iterative Reconstruction method for computed tomography
Yang, Liu; Qi, Sharon X; Gao, Hao
2013-01-01T23:59:59.000Z
Purpose: CT image reconstruction techniques have two major categories: analytical reconstruction (AR) method and iterative reconstruction (IR) method. AR reconstructs images through analytical formulas, such as filtered backprojection (FBP) in 2D and Feldkamp-Davis-Kress (FDK) method in 3D, which can be either mathematically exact or approximate. On the other hand, IR is often based on the discrete forward model of X-ray transform and formulated as a minimization problem with some appropriate image regularization method, so that the reconstructed image corresponds to the minimizer of the optimization problem. This work is to investigate the fused analytical and iterative reconstruction (AIR) method. Methods: Based on IR with L1-type image regularization, AIR is formulated with a AR-specific preconditioner in the data fidelity term, which results in the minimal change of the solution algorithm that replaces the adjoint X-ray transform by the filtered X-ray transform. As a proof-of-concept 2D example of AIR, FB...
Development of a Tritium Extruder for ITER Pellet Injection
M.J. Gouge; P.W. Fisher
1998-09-01T23:59:59.000Z
As part of the International Thermonuclear Experimental Reactor (ITER) plasma fueling development program, Oak Ridge National Laboratory (ORNL) has fabricated a pellet injection system to test the mechanical and thermal properties of extruded tritium. Hydrogenic pellets will be used in ITER to sustain the fusion power in the plasma core and may be crucial in reducing first-wall tritium inventories by a process of "isotopic fueling" in which tritium-rich pellets fuel the burning plasma core and deuterium gas fuels the edge. This repeating single-stage pneumatic pellet injector, called the Tritium-Proof-of-Principle Phase II (TPOP-II) Pellet Injector, has a piston-driven mechanical extruder and is designed to extrude and accelerate hydrogenic pellets sized for the ITER device. The TPOP-II program has the following development goals: evaluate the feasibility of extruding tritium and deuterium-tritium (D-T) mixtures for use in future pellet injection systems; determine the mechanical and thermal properties of tritium and D-T extrusions; integrate, test, and evaluate the extruder in a repeating, single-stage light gas gun that is sized for the ITER application (pellet diameter -7 to 8 mm); evaluate options for recycling propellant and extruder exhaust gas; and evaluate operability and reliability of ITER prototypical fueling systems in an environment of significant tritium inventory that requires secondary and room containment systems. In tests with deuterium feed at ORNL, up to 13 pellets per extrusion have been extruded at rates up to 1 Hz and accelerated to speeds of 1.0 to 1.1 km/s, using hydrogen propellant gas at a supply pressure of 65 bar. Initially, deuterium pellets 7.5 mm in diameter and 11 mm in length were produced-the largest cryogenic pellets produced by the fusion program to date. These pellets represent about a 10% density perturbation to ITER. Subsequently, the extruder nozzle was modified to produce pellets that are almost 7.5-mm right circular cylinders. Tritium and D-T pellets have been produced in experiments at the Los Alamos National Laboratory Tritium Systems Test Assembly. About 38 g of tritium have been utilized in the experiment. The tritium was received in eight batches, six from product containers and two from the Isotope Separation System. Two types of runs were made: those in which the material was only extruded and those in which pellets were produced and fired with deuterium propellant. A total of 36 TZ runs and 28 D-T runs have been made. A total of 36 pure tritium runs and 28 D-T mixture runs were made. Extrusion experiments indicate that both T2 and D-T will require higher extrusion forces than D2 by about a factor of two.
Benchmarking ICRF Full-wave Solvers for ITER
R. V. Budny, L. Berry, R. Bilato, P. Bonoli, M. Brambilla, R. J. Dumont, A. Fukuyama, R. Harvey, E. F. Jaeger, K. Indireshkumar, E. Lerche, D. McCune, C. K. Phillips, V. Vdovin, J. Wright, and members of the ITPA-IOS
2011-01-06T23:59:59.000Z
Abstract Benchmarking of full-wave solvers for ICRF simulations is performed using plasma profiles and equilibria obtained from integrated self-consistent modeling predictions of four ITER plasmas. One is for a high performance baseline (5.3 T, 15 MA) DT H-mode. The others are for half-field, half-current plasmas of interest for the pre-activation phase with bulk plasma ion species being either hydrogen or He4. The predicted profiles are used by six full-wave solver groups to simulate the ICRF electromagnetic fields and heating, and by three of these groups to simulate the current-drive. Approximate agreement is achieved for the predicted heating power for the DT and He4 cases. Factor of two disagreements are found for the cases with second harmonic He3 heating in bulk H cases. Approximate agreement is achieved simulating the ICRF current drive.
Symbolic Opportunistic Policy Iteration for Factored-Action MDPs
Iteration (OPI), which is a novel convergent algorithm lying between VI and MPI, that applies policy to converge. This new algorithm, Opportunistic Policy Iteration (OPI), constrains a select subset
Neil Calder neil.calder@iter.org
on the ITER site, financed by the European Union. Approval was also given to for a Test Blanket Module Program to demonstrate the scientific and technological feasibility of fusion power for energy purposes. Fusion plant that is safe and reliable, environmentally responsible and economically viable, with abundant
Chirac calls ITER essential for planet's future
fusion reactor. "Today, our energy consumption has put us in danger. It's mainly based on oil, gasChirac calls ITER essential for planet's future CADARACHE, France, June 30 (AFP) - French President in southern France as vital to the planet's future, praising European solidarity in sealing the deal. "This
Using Iterative Compilation to Reduce Energy Consumption
Gheorghita, Valentin
or to re- duce power. Most transformations require loop re- structuring. Although a large number.v.gheorghita,h.corporaal,a.a.basten}@tue.nl Keywords: Iterative Compilation, Program Optimization, Energy Consumption, Program Transformation. Abstract. This is emphasized by new demands added to compilers, like reducing static code size, energy consumption or power
US ITER Project Status Fusion Power Associates
.5 Gigajoule stored energy capacity) Central Solenoid The Heartbeat of ITER 12/10/13 FPA/Sauthoff 1,000 tonne assembled and is being prepared for testing Photo: Seco Warwick (wiebodzin. Poland) 11 #12;Toroidal Field Conductor Specs: 18 toroidal field coils are designed to have ·Total magnetic energy of 41 gigajoules
Insights from US ITER: Strategies for Accelerating
Infrastructure Develop materials and systems iteratively #12;5. Organize for success. Avoid creation (new than a program. Mission: ·Rapid materials and fusion systems development, leading-making Design, build and upgrade basic facilities: avoid new facilities and new institutions Plan the teaming
Michel Claessens michel.claessens@iter.org
. This two-day meeting brought together senior representatives from all seven ITER Members--China-of-a-kind global collaboration. Europe will contribute almost half of the costs of its construction, while the other six Members to this joint international venture (China, India, Japan, the Republic of Korea
AN ALGEBRAIC DESCRIPTION OF ITERATIVE DECODING SCHEMES
Soljanin, Emina
AN ALGEBRAIC DESCRIPTION OF ITERATIVE DECODING SCHEMES ELKE OFFER AND EMINA SOLJANIN Abstract University of Technology, D- 80290 Munich, Germany, elke@lnt.e-technik.tu-muenchen.de Mathematical Sciences Research Center, Bell Labs, Lucent Technologies, Murray Hill, NJ 07974, USA. emina@lucent.com 1 #12;2 E
Joint News Release ELEVENTH ITER NEGOTIATIONS MEETING
of Science and Technology of China Department of International Co-operation Luo Delong luodl@mail.most.govJoint News Release ELEVENTH ITER NEGOTIATIONS MEETING CHENGDU , CHINA, 24OCTOBER 2005 Delegations from China, European Union, Japan, the Republic of Korea, the Russian Federation and the United States
Accurate Direct Illumination Using Iterative Adaptive Sampling
Bala, Kavita
Accurate Direct Illumination Using Iterative Adaptive Sampling Michael Donikian, Bruce Walter with many lights and complex occlusion. Images are first divided into 8 Â 8 pixel blocks and for each point to be shaded within a block, a probability density function (PDF) is constructed over the lights and sampled
ITER Project Status Positioning the US
of the funds #12;ITER value is about 50% in "high-tech systems" TF Coils and Structure 10% PF/CS/CC 4% Nb3Sn 2%Divertor 3% Blanket 6%Heating System 7% Vessel 8% Pulsed Power Supplies 6% Cryoplant and Cryodistribution 3% Cryostat & Thermal Shields 4% Steady State Power Supply System 1% Machine Assembly and Tooling
A Recommendation System for Preconditioned Iterative Solvers
George, Thomas
2011-02-22T23:59:59.000Z
. . . . . . . . . . . . . . . . . . . . . . . . . . 18 1. Level-based Incomplete Cholesky Factorization (IC(k)) . . 19 2. Threshold-based Incomplete Cholesky (ICT) . . . . . . . 20 3. Sparse Approximate Inverse (SAI) . . . . . . . . . . . . . 21 4. Algebraic Multigrid (AMG... that resulted in the best memory, time, and MTP per- formance profile area for the ILUPACK MLICT and WSMP ICT pre- conditioners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 VIII Iterative solver configurations that resulted in the best...
ELM heat flux in the ITER divertor
Leonard, A.W.; Osborne, T.H. [General Atomics, San Diego, CA (United States); Hermann, A.; Suttrop, W. [Max Planck Inst. fuer Plasmaphysics (Germany); Itami, K. [Japan Atomic Energy Research Inst. (Japan); Lingertat, J. [JET Joint Undertaking, Abingdon (United Kingdom); Loarte, A. [Next European Torus, Garching (Germany)
1998-07-01T23:59:59.000Z
Edge-Localized-Modes (ELMs) have the potential to produce unacceptable levels of erosion of the ITER divertor. Ablation of the carbon divertor target will occur if the surface temperature rises above about 2,500 C. Because a large number of ELMs, {ge}1000, are expected in each discharge it is important that the surface temperature rise due to an individual ELM remain below this threshold. Calculations that have been carried out for the ITER carbon divertor target indicate ablation will occur for ELM energy {ge}0.5MJ/m{sup 2} if it is deposited in 0.1 ms, or 1.2 MJ/m{sup 2} if the deposition time is 1.0 ms. Since {Delta}T{proportional_to}Q{Delta}t{sup {minus}1/2}, an ablation threshold can be estimated at Q{Delta}t{sup {minus}1/2}{approx}45 MJm{sup {minus}2} s{sup {minus}1/2} where Q is the divertor ELM energy density in J-m{sup {minus}2} and {Delta}t is the time in seconds for that deposition. If a significant fraction of ELMs exceed this threshold then an unacceptable level of erosion may take place. The ablation parameter in ITER can be determined by scaling four factors from present experiments: the ELM energy loss from the core plasma, the fraction of ELM energy deposited on the divertor target, the area of the ELM profile onto the target, and the time for the ELM deposition. ELM data from JET, ASDEX-Upgrade, JT-60U, DIII-D and Compass-D have been assembled by the ITER Divertor Modeling and Database expert group into a database for the purpose of predicting these factors for ELMs in the ITER divertor.
Application of Asymptotic Iteration Method (AIM) to a Deformed Well Problem
Hakan Ciftci; H. Fatih Kisoglu
2015-06-23T23:59:59.000Z
We have used Asymptotic Iteration Method (AIM) for obtaining the eigenvalues of the Schrodinger's equation for a deformed well problem representing trigonometric functions. By solving the problem, we have found that the Schrodinger's equation for the considered potential has quasi-exact solutions. Additionally, we have also calculated the perturbation expansion of energy eigenvalues and found very simple analytical expression of the energy. Finally, we have considered more general cases and obtained energy eigenvalues for arbitrary potential parameters.
ACCELERATING ITERATIVE FIELD-COMPENSATED MR IMAGE RECONSTRUCTION ON GPUS
Hwu, Wen-mei W.
ACCELERATING ITERATIVE FIELD-COMPENSATED MR IMAGE RECONSTRUCTION ON GPUS Yue Zhuo1 , Xiao-Long Wu2 , Justin P. Haldar2 , Wen-mei Hwu2 , Zhi-pei Liang2 , Bradley P. Sutton1 1 Department of Bioengineering for iterative MR image reconstruction using Graphics Processing Units (GPU). In MRI, iterative reconstruction
Dale M. Meade MFE Plenary Session on ITER Costs
Dale M. Meade MFE Plenary Session on ITER Costs 2002 Fusion Summer Study Snowmass, CO July 9, 2002 FIRE Lighting the Way to Fusion http://fire.pppl.gov A Comparison of Unit Costs for FIRE and ITER #12;A Comparison of Unit Costs for FIRE and ITER · A simple rule of thumb for comparing costs of similar devices
Budget Planning Meeting FY 2007 Status of ITER Negotiations
Budget Planning Meeting FY 2007 Status of ITER Negotiations Michael Roberts, Director ITER Preparations of $5M · Using FY05 $5M to continue to get ready for MIE project · Maintaining U.S. visiting experts · Further establishing U.S. ITER Project Office · Fulfilling DOE project management requirements
Iterative Water-filling for Gaussian Vector Multiple Access Channels
Li, Tiffany Jing
Iterative Water-filling for Gaussian Vector Multiple Access Channels W. Yu, W. Rhee, S. Boyd, and J. Cioffi Zhenlei Shen Lehigh University March 29, 2005 Zhenlei Shen (Lehigh) Iterative Water-filling for Gaussian Vector Multiple Access ChannelsMarch 29, 2005 1 / 13 #12;1 Quick Review 2 Iterative Water
energy technologies, including renewable energy, energy efficiency and advanced energy technologiesAGREEMENT on the Establishment of the ITER International Fusion Energy Organization for the Joint Fusion Energy Organization Article 2 Purpose of the ITER Organization Article 3 Functions of the ITER
ON THE C-INTEGRAL BENEDETTO BONGIORNO
Talvila, Erik
ON THE C-INTEGRAL BENEDETTO BONGIORNO Let F with an integration process (called totalization) that includes the Lebesgue integral and the Riemann improper integral. Two years later, a second solution was obtained by O. Perron with a method based
Approaches to confined alpha diagnostics on ITER
Fisher, R.K. [General Atomics, PO Box 85608, San Diego, California 92186-5608 (United States)
2004-10-01T23:59:59.000Z
Three approaches to obtain information on the confined fast alphas in the International Thermonuclear Experimental Reactor (ITER) are proposed. The first technique measures the energetic charge exchange (CX) neutrals that result from the alpha collision-induced knock-on fuel ion tails undergoing electron capture on the MeV D neutral beams planned for heating and current drive. The second technique measures the energetic knock-on neutron tail due to alphas using the lengths of the proton recoil tracks produced by neutron collisions in nuclear emulsions. The range of the 14 to 20 MeV recoil protons increases by {approx}140 {mu}m per MeV. The third approach would measure the CX helium neutrals resulting from confined alphas capturing two electrons in the ablation cloud surrounding a dense gas jet that has been proposed for disruption mitigation in ITER.
Main challenges for ITER optical diagnostics
Vukolov, K. Yu.; Orlovskiy, I. I.; Alekseev, A. G.; Borisov, A. A.; Andreenko, E. N.; Kukushkin, A. B.; Lisitsa, V. S.; Neverov, V. S. [Tokamak Physics Institute, NRC Kurchatov Institute, 123182 Moscow (Russian Federation)
2014-08-21T23:59:59.000Z
The review is made of the problems of ITER optical diagnostics. Most of these problems will be related to the intensive neutron radiation from hot plasma. At a high level of radiation loads the most types of materials gradually change their properties. This effect is most critical for optical diagnostics because of degradation of optical glasses and mirrors. The degradation of mirrors, that collect the light from plasma, basically will be induced by impurity deposition and (or) sputtering by charge exchange atoms. Main attention is paid to the search of glasses for vacuum windows and achromatic lens which are stable under ITER irradiation conditions. The last results of irradiation tests in nuclear reactor of candidate silica glasses KU-1, KS-4V and TF 200 are presented. An additional problem is discussed that deals with the stray light produced by multiple reflections from the first wall of the intense light emitted in the divertor plasma.
Automated structure solution with the PHENIX suite
Terwilliger, Thomas C [Los Alamos National Laboratory; Zwart, Peter H [LBNL; Afonine, Pavel V [LBNL; Grosse - Kunstleve, Ralf W [LBNL
2008-01-01T23:59:59.000Z
Significant time and effort are often required to solve and complete a macromolecular crystal structure. The development of automated computational methods for the analysis, solution, and completion of crystallographic structures has the potential to produce minimally biased models in a short time without the need for manual intervention. The PHENIX software suite is a highly automated system for macromolecular structure determination that can rapidly arrive at an initial partial model of a structure without significant human intervention, given moderate resolution, and good quality data. This achievement has been made possible by the development of new algorithms for structure determination, maximum-likelihood molecular replacement (PHASER), heavy-atom search (HySS), template- and pattern-based automated model-building (RESOLVE, TEXTAL), automated macromolecular refinement (phenix. refine), and iterative model-building, density modification and refinement that can operate at moderate resolution (RESOLVE, AutoBuild). These algorithms are based on a highly integrated and comprehensive set of crystallographic libraries that have been built and made available to the community. The algorithms are tightly linked and made easily accessible to users through the PHENIX Wizards and the PHENIX GUI.
Automated Structure Solution with the PHENIX Suite
Zwart, Peter H.; Zwart, Peter H.; Afonine, Pavel; Grosse-Kunstleve, Ralf W.; Hung, Li-Wei; Ioerger, Tom R.; McCoy, A.J.; McKee, Eric; Moriarty, Nigel; Read, Randy J.; Sacchettini, James C.; Sauter, Nicholas K.; Storoni, L.C.; Terwilliger, Tomas C.; Adams, Paul D.
2008-06-09T23:59:59.000Z
Significant time and effort are often required to solve and complete a macromolecular crystal structure. The development of automated computational methods for the analysis, solution and completion of crystallographic structures has the potential to produce minimally biased models in a short time without the need for manual intervention. The PHENIX software suite is a highly automated system for macromolecular structure determination that can rapidly arrive at an initial partial model of a structure without significant human intervention, given moderate resolution and good quality data. This achievement has been made possible by the development of new algorithms for structure determination, maximum-likelihood molecular replacement (PHASER), heavy-atom search (HySS), template and pattern-based automated model-building (RESOLVE, TEXTAL), automated macromolecular refinement (phenix.refine), and iterative model-building, density modification and refinement that can operate at moderate resolution (RESOLVE, AutoBuild). These algorithms are based on a highly integrated and comprehensive set of crystallographic libraries that have been built and made available to the community. The algorithms are tightly linked and made easily accessible to users through the PHENIX Wizards and the PHENIX GUI.
Code of a Tokamak Fusion Energy Facility ITER
Yasuhide Asada [Central Research Institute of Electric Power Industry - CRIEPI (Japan); Kenzo Miya [Keio University (Japan); Kazuhiko Hada; Eisuke Tada [Japan Atomic Energy Research Institute (Japan)
2002-07-01T23:59:59.000Z
The technical structural code for ITER (International Thermonuclear Experimental Fusion Reactor) and, as more generic applications, for D-T burning fusion power facilities (hereafter, Fusion Code) should be innovative because of their quite different features of safety and mechanical components from nuclear fission reactors, and the necessity of introducing several new fabrication and examination technologies. Introduction of such newly developed technologies as inspection-free automatic welding into the Fusion Code is rationalized by a pilot application of a new code concept of {sup s}ystem-based code for integrity{sup .} The code concept means an integration of element technical items necessary for construction, operation and maintenance of mechanical components of fusion power facilities into a single system to attain an optimization of the total margin of these components. Unique and innovative items of the Fusion Code are typically as follows: - Use of non-metals; - Cryogenic application; - New design margins on allowable stresses, and other new design rules; - Use of inspection-free automatic welding, and other newly developed fabrication technologies; - Graded approach of quality assurance standard to cover radiological safety-system components as well as non-safety-system components; - Consideration on replacement components. (authors)
Terwilliger, Thomas C., E-mail: terwilliger@lanl.gov [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Grosse-Kunstleve, Ralf W.; Afonine, Pavel V.; Moriarty, Nigel W.; Adams, Paul D. [Lawrence Berkeley National Laboratory, One Cyclotron Road, Building 64R0121, Berkeley, CA 94720 (United States); Read, Randy J. [Department of Haematology, University of Cambridge, Cambridge CB2 0XY (United Kingdom); Zwart, Peter H. [Lawrence Berkeley National Laboratory, One Cyclotron Road, Building 64R0121, Berkeley, CA 94720 (United States); Hung, Li-Wei [Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
2008-05-01T23:59:59.000Z
An OMIT procedure is presented that has the benefits of iterative model building density modification and refinement yet is essentially unbiased by the atomic model that is built. A procedure for carrying out iterative model building, density modification and refinement is presented in which the density in an OMIT region is essentially unbiased by an atomic model. Density from a set of overlapping OMIT regions can be combined to create a composite ‘iterative-build’ OMIT map that is everywhere unbiased by an atomic model but also everywhere benefiting from the model-based information present elsewhere in the unit cell. The procedure may have applications in the validation of specific features in atomic models as well as in overall model validation. The procedure is demonstrated with a molecular-replacement structure and with an experimentally phased structure and a variation on the method is demonstrated by removing model bias from a structure from the Protein Data Bank.
Raffray, A. René
the thermonuclear plasma and cover an area of about 850 m2 . The main function of the divertor is minimizing energy. The fusion reactions occur within the volume of the ITER vacuum vessel, which contains the thermonuclear plasma. One of the most technically challenging components of the ITER machine are plasma
Heinstein, M.W. [Sandia National Labs., Albuquerque, NM (United States). Engineering Mechanics and Material Modeling Dept.
1997-10-01T23:59:59.000Z
A contact enforcement algorithm has been developed for matrix-free quasistatic finite element techniques. Matrix-free (iterative) solution algorithms such as nonlinear Conjugate Gradients (CG) and Dynamic Relaxation (DR) are distinctive in that the number of iterations required for convergence is typically of the same order as the number of degrees of freedom of the model. From iteration to iteration the contact normal and tangential forces vary significantly making contact constraint satisfaction tenuous. Furthermore, global determination and enforcement of the contact constraints every iteration could be questioned on the grounds of efficiency. This work addresses this situation by introducing an intermediate iteration for treating the active gap constraint and at the same time exactly (kinematically) enforcing the linearized gap rate constraint for both frictionless and frictional response.
Dmitriy Y. Anistratov; Adrian Constantinescu; Loren Roberts; William Wieselquist
2007-04-30T23:59:59.000Z
This is a project in the field of fundamental research on numerical methods for solving the particle transport equation. Numerous practical problems require to use unstructured meshes, for example, detailed nuclear reactor assembly-level calculations, large-scale reactor core calculations, radiative hydrodynamics problems, where the mesh is determined by hydrodynamic processes, and well-logging problems in which the media structure has very complicated geometry. Currently this is an area of very active research in numerical transport theory. main issues in developing numerical methods for solving the transport equation are the accuracy of the numerical solution and effectiveness of iteration procedure. The problem in case of unstructured grids is that it is very difficult to derive an iteration algorithm that will be unconditionally stable.
US ITER toroidal field coil conductor produc
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (MillionStructural Basis of5, 2014 | ReleaseUNCLASSI H E D SSlFlED BNL-25 - - e.UPF: ITER toroidal
Iterative multiuser detection techniques for CDMA systems
Du, Xuechao
2002-01-01T23:59:59.000Z
previous iteration). For the information bns dt ~chinnel encoder mlerlea iy ubol iiiippcr spreader Sl iiiforiii itio bits d ch: net encode interleavcr symbol mapper li e'Icier + + channel te iiifoiiliailo lilts d chminel inlerlea er [ symbol... y(i), the nozse vaznance o, and thc przor code bit LLR, Az[b&(z)] u!hzch zs the output of the channel decod&r. Inztiahze Avz[b&(i)] = 0, bk(z) = 0. For i = 1, , &'l7 ~ Compute (1 ? b (i) tanh ? Az[b, (i)] bk(i) (b&(i), -, bk &(z), 0, bk&. &(i...
Borchers, Brian
by the integral 2 2sin 0 0 rdrd . 2. Write ( , ) R f x y dA as an iterated integral where R is the region shown below and f is an arbitrary continuous function on R. 3. Rewrite the integral 2 11 1 1 0 ( , , ) y x f x y z dzdydx as an iterated integral in order dxdydz . 4. Find the mass of the plane lamina
Diverse Power Iteration Embeddings and Its Applications
Huang H.; Yoo S.; Yu, D.; Qin, H.
2014-12-14T23:59:59.000Z
Abstract—Spectral Embedding is one of the most effective dimension reduction algorithms in data mining. However, its computation complexity has to be mitigated in order to apply it for real-world large scale data analysis. Many researches have been focusing on developing approximate spectral embeddings which are more efficient, but meanwhile far less effective. This paper proposes Diverse Power Iteration Embeddings (DPIE), which not only retains the similar efficiency of power iteration methods but also produces a series of diverse and more effective embedding vectors. We test this novel method by applying it to various data mining applications (e.g. clustering, anomaly detection and feature selection) and evaluating their performance improvements. The experimental results show our proposed DPIE is more effective than popular spectral approximation methods, and obtains the similar quality of classic spectral embedding derived from eigen-decompositions. Moreover it is extremely fast on big data applications. For example in terms of clustering result, DPIE achieves as good as 95% of classic spectral clustering on the complex datasets but 4000+ times faster in limited memory environment.
San Diego 01.05.2001 Power and Particle Exhaust in ITER Slide 1 by G. Janeschitz, et.al. ITER. Pacher, G. Pacher, R. Tivey, M. Sugihara, JCT and HTs #12;San Diego; 01.05.2001 Power and Particle to pump #12;San Diego; 01.05.2001 Power and Particle Exhaust in ITER Slide 3 by G. Janeschitz. ITER
Fractional Variational Iteration Method for Fractional Nonlinear Differential Equations
Guo-cheng Wu
2010-07-12T23:59:59.000Z
Recently, fractional differential equations have been investigated via the famous variational iteration method. However, all the previous works avoid the term of fractional derivative and handle them as a restricted variation. In order to overcome such shortcomings, a fractional variational iteration method is proposed. The Lagrange multipliers can be identified explicitly based on fractional variational theory.
ITER HEAT REMOVAL SYSTEM SYSTEM & PROCESS CONTROL DESIGN
Raffray, A. René
ITER HEAT REMOVAL SYSTEM SYSTEM & PROCESS CONTROL DESIGN Y. Hoshi 1 , Y. Kataoka 2 , V. Tanchuk 1, Germany; 4 EU Home Team, Garching, Germany; 5 JA Home Team, Naka, Japan The paper reports ITER heat removal system concept and the preliminary investigation of process control system to meet
Ned Sauthoff U.S. ITER Planning Officer
;Roadmap Very brief overview of toroidal magnetic confinement, burning plasmas, and ITER ITER/Conductors/Actuators Scrape-off layer Pedestal region Magnetic island region Core confinement region Sawtooth/fishbone region collaboration to build the first fusion science experiment capable of producing a self-sustaining fusion
Mathematics A Generalized JacobiDavidson iteration method
Sleijpen, Gerard
University Utrecht STUV Department of Mathematics A Generalized JacobiÂDavidson iteration method #12; A Generalized JacobiÂDavidson iteration method for linear eigenvalue problems \\Lambda Gerard L. The method is shown to have an interesting relation with an old method of Jacobi. This leads to a new method
Efficient computational methods for iterative cokriging Wolfgang Nowak
Cirpka, Olaf Arie
Efficient computational methods for iterative cokriging Wolfgang Nowak and Olaf A. Cirpka. Cokriging is, however, often restricted by its computational costs. We show how to increase the computational efficiency of iterative cokriging by using a combination of both well-known and newly developed
Iterated Models and Failure Detectors (Brief notes for discussion)
Lynch, Nancy
power of iterated models at the same rate that it does on non- iterated models. Finally we provide new models. A. Cornejo (CSAIL) TDS Seminar October 11, 2007 2 / 17 #12;Agenda 1 Communication models Atomic models Atomic snapshot Atomic snapshot In a system with n processes, an atomic snapshot object is built
Proving termination by policy iteration Damien Masse1
Paris-Sud XI, Université de
NSAD 2012 Proving termination by policy iteration Damien Mass´e1 Lab-Sticc, UMR 6285 UBO conditions for program termination. Restricting ourselves to affine programs and the abstract domain. Keywords: Abstract interpretation, policy iteration, template constraint matrices, termination analysis. 1
October 6, 1997 ITER L-Mode Con nement Database
October 6, 1997 ITER L-Mode Con nement Database S.M. Kaye and the ITER Con nement Database Working Group Abstract This paper describes the content of an L-mode database that has been compiled with data, and Tore-Supra. The database consists of a total of 2938 entries, 1881 of which are in the L-phase while
IAEA-CN-SO/F-I-4 ITER: CONCEPT DEFINITION*
way. 1. INTRODUCTION The activity of the International Thermonuclear Experimental Reactor (ITER) is conducted under the auspices of the International Atomic Energy Agency jointly by Euratom, Japan, the Union. * The activity of the International Thermonuclear Experimental Reactor (ITER) is conducted under the auspices
Final Report on ITER Task Agreement 81-10
Brad J. Merrill
2009-01-01T23:59:59.000Z
An International Thermonuclear Experimental Reactor (ITER) Implementing Task Agreement (ITA) on Magnet Safety was established between the ITER International Organization (IO) and the Idaho National Laboratory (INL) Fusion Safety Program (FSP) during calendar year 2004. The objectives of this ITA were to add new capabilities to the MAGARC code and to use this updated version of MAGARC to analyze unmitigated superconductor quench events for both poloidal field (PF) and toroidal field (TF) coils of the ITER design. This report documents the completion of the work scope for this ITA. Based on the results obtained for this ITA, an unmitigated quench event in an ITER larger PF coil does not appear to be as severe an accident as in an ITER TF coil.
R&D activities on RF contacts for the ITER ion cyclotron resonance heating launcher
Hillairet, Julien; Bamber, Rob; Beaumont, Bertrand; Bernard, Jean-Michel; Delaplanche, Jean-Marc; Durodié, Frédéric; Lamalle, Philippe; Lombard, Gilles; Nicholls, Keith; Shannon, Mark; Vulliez, Karl; Cantone, Vincent; Hatchressian, Jean-Claude; Lebourg, Philippe; Martinez, André; Mollard, Patrick; Mouyon, David; Pagano, Marco; Patterlini, Jean-Claude; Soler, Bernard; Thouvenin, Didier; Toulouse, Lionel; Verger, Jean-Marc; Vigne, Terence; Volpe, Robert
2015-01-01T23:59:59.000Z
Embedded RF contacts are integrated within the ITER ICRH launcher to allow assembling, sliding and to lower the thermo-mechanical stress. They have to withstand a peak RF current up to 2.5 kA at 55 MHz in steady-state conditions, in the vacuum environment of themachine.The contacts have to sustain a temperature up to 250{\\textdegree}Cduring several days in baking operations and have to be reliable during the whole life of the launcher without degradation. The RF contacts are critical components for the launcher performance and intensive R&D is therefore required, since no RF contactshave so far been qualified at these specifications. In order to test and validate the anticipated RF contacts in operational conditions, CEA has prepared a test platform consisting of a steady-state vacuum pumped RF resonator. In collaboration with ITER Organization and the CYCLE consortium (CYclotronCLuster for Europe), an R&D program has been conducted to develop RF contacts that meet the ITER ICRH launcher specification...
ITER CENTRAL SOLENOID COIL INSULATION QUALIFICATION
Martovetsky, N N; Mann, T L; Miller, J R; Freudenberg, K D; Reed, R P; Walsh, R P; McColskey, J D; Evans, D
2009-06-11T23:59:59.000Z
An insulation system for ITER Central Solenoid must have sufficiently high electrical and structural strength. Design efforts to bring stresses in the turn and layer insulation within allowables failed. It turned out to be impossible to eliminate high local tensile stresses in the winding pack. When high local stresses can not be designed out, the qualification procedure requires verification of the acceptable structural and electrical strength by testing. We built two 4 x 4 arrays of the conductor jacket with two options of the CS insulation and subjected the arrays to 1.2 million compressive cycles at 60 MPa and at 76 K. Such conditions simulated stresses in the CS insulation. We performed voltage withstand tests and after end of cycling we measured the breakdown voltages between in the arrays. After that we dissectioned the arrays and studied micro cracks in the insulation. We report details of the specimens preparation, test procedures and test results.
Los Alamos National Laboratory, Mailstop M888, Los Alamos, NM 87545, USA; Lawrence Berkeley National Laboratory, One Cyclotron Road, Building 64R0121, Berkeley, CA 94720, USA; Department of Haematology, University of Cambridge, Cambridge CB2 0XY, England; Terwilliger, Thomas; Terwilliger, T.C.; Grosse-Kunstleve, Ralf Wilhelm; Afonine, P.V.; Moriarty, N.W.; Zwart, P.H.; Hung, L.-W.; Read, R.J.; Adams, P.D.
2008-02-12T23:59:59.000Z
A procedure for carrying out iterative model-building, density modification and refinement is presented in which the density in an OMIT region is essentially unbiased by an atomic model. Density from a set of overlapping OMIT regions can be combined to create a composite 'Iterative-Build' OMIT map that is everywhere unbiased by an atomic model but also everywhere benefiting from the model-based information present elsewhere in the unit cell. The procedure may have applications in the validation of specific features in atomic models as well as in overall model validation. The procedure is demonstrated with a molecular replacement structure and with an experimentally-phased structure, and a variation on the method is demonstrated by removing model bias from a structure from the Protein Data Bank.
Nuclear Forensic Inferences Using Iterative Multidimensional Statistics
Robel, M; Kristo, M J; Heller, M A
2009-06-09T23:59:59.000Z
Nuclear forensics involves the analysis of interdicted nuclear material for specific material characteristics (referred to as 'signatures') that imply specific geographical locations, production processes, culprit intentions, etc. Predictive signatures rely on expert knowledge of physics, chemistry, and engineering to develop inferences from these material characteristics. Comparative signatures, on the other hand, rely on comparison of the material characteristics of the interdicted sample (the 'questioned sample' in FBI parlance) with those of a set of known samples. In the ideal case, the set of known samples would be a comprehensive nuclear forensics database, a database which does not currently exist. In fact, our ability to analyze interdicted samples and produce an extensive list of precise materials characteristics far exceeds our ability to interpret the results. Therefore, as we seek to develop the extensive databases necessary for nuclear forensics, we must also develop the methods necessary to produce the necessary inferences from comparison of our analytical results with these large, multidimensional sets of data. In the work reported here, we used a large, multidimensional dataset of results from quality control analyses of uranium ore concentrate (UOC, sometimes called 'yellowcake'). We have found that traditional multidimensional techniques, such as principal components analysis (PCA), are especially useful for understanding such datasets and drawing relevant conclusions. In particular, we have developed an iterative partial least squares-discriminant analysis (PLS-DA) procedure that has proven especially adept at identifying the production location of unknown UOC samples. By removing classes which fell far outside the initial decision boundary, and then rebuilding the PLS-DA model, we have consistently produced better and more definitive attributions than with a single pass classification approach. Performance of the iterative PLS-DA method compared favorably to that of classification and regression tree (CART) and k nearest neighbor (KNN) algorithms, with the best combination of accuracy and robustness, as tested by classifying samples measured independently in our laboratories against the vendor QC based reference set.
Heffron, Timothy Paul
2005-01-01T23:59:59.000Z
I. The Development of Methods for the Iterative Synthesis of Polytetrahydropyrans An iterative method comprising chain homologation, epoxidation, 6-endo cyclization, and protiodesilylation was developed. Notable achievements ...
Gao, Hao
2015-01-01T23:59:59.000Z
This work is to develop a general framework, namely filtered iterative reconstruction (FIR) method, to incorporate analytical reconstruction (AR) method into iterative reconstruction (IR) method, for enhanced CT image quality. Specifically, FIR is formulated as a combination of filtered data fidelity and sparsity regularization, and then solved by proximal forward-backward splitting (PFBS) algorithm. As a result, the image reconstruction decouples data fidelity and image regularization with a two-step iterative scheme, during which an AR-projection step updates the filtered data fidelity term, while a denoising solver updates the sparsity regularization term. During the AR-projection step, the image is projected to the data domain to form the data residual, and then reconstructed by certain AR to a residual image which is in turn weighted together with previous image iterate to form next image iterate. Since the eigenvalues of AR-projection operator are close to the unity, PFBS based FIR has a fast convergenc...
Iterative Decoding and Turbo Equalization: The Z-Crease Phenomenon
Jing Li; Kai Xie
2013-06-03T23:59:59.000Z
Iterative probabilistic inference, popularly dubbed the soft-iterative paradigm, has found great use in a wide range of communication applications, including turbo decoding and turbo equalization. The classic approach of analyzing the iterative approach inevitably use the statistical and information-theoretical tools that bear ensemble-average flavors. This paper consider the per-block error rate performance, and analyzes it using nonlinear dynamical theory. By modeling the iterative processor as a nonlinear dynamical system, we report a universal "Z-crease phenomenon:" the zig-zag or up-and-down fluctuation -- rather than the monotonic decrease -- of the per-block errors, as the number of iteration increases. Using the turbo decoder as an example, we also report several interesting motion phenomenons which were not previously reported, and which appear to correspond well with the notion of "pseudo codewords" and "stopping/trapping sets." We further propose a heuristic stopping criterion to control Z-crease and identify the best iteration. Our stopping criterion is most useful for controlling the worst-case per-block errors, and helps to significantly reduce the average-iteration numbers.
Steady-state solution methods for open quantum optical systems
Nation, P D
2015-01-01T23:59:59.000Z
We discuss the numerical solution methods available when solving for the steady-state density matrix of a time-independent open quantum optical system, where the system operators are expressed in a suitable basis representation as sparse matrices. In particular, we focus on the difficulties posed by the non-Hermitian structure of the Lindblad super operator, and the numerical techniques designed to mitigate these pitfalls. In addition, we introduce a doubly iterative inverse-power method that can give reduced memory and runtime requirements in situations where other iterative methods are limited due to poor bandwidth and profile reduction. The relevant methods are demonstrated on several prototypical quantum optical systems where it is found that iterative methods based on iLU factorization using reverse Cuthill-Mckee ordering tend to outperform other solution techniques in terms of both memory consumption and runtime as the size of the underlying Hilbert space increases. For eigenvalue solving, Krylov iterat...
Demonstration of ITER Operational Scenarios on DIII-D
Doyle, E J; Budny, R V; DeBoo, J C; Ferron, J R; Jackson, G L; Luce, T C; Murakami, M; Osborne, T H; Park, J; Politzer, P A; Reimerdes, H; Casper, T A; Challis, C D; Groebner, R J; Holcomb, C T; Hyatt, A W; La Haye, R J; McKee, G R; Petrie, T W; Petty, C C; Rhodes, T L; Shafer, M W; Snyder, P B; Strait, E J; Wade, M R; Wang, G; West, W P; Zeng, L
2008-10-13T23:59:59.000Z
The DIII-D program has recently initiated an effort to provide suitably scaled experimental evaluations of four primary ITER operational scenarios. New and unique features of this work are that the plasmas incorporate essential features of the ITER scenarios and anticipated operating characteristics; e.g., the plasma cross-section, aspect ratio and value of I/aB of the DIII-D discharges match the ITER design, with size reduced by a factor of 3.7. Key aspects of all four scenarios, such as target values for {beta}{sub N} and H{sub 98}, have been replicated successfully on DIII-D, providing an improved and unified physics basis for transport and stability modeling, as well as for performance extrapolation to ITER. In all four scenarios normalized performance equals or closely approaches that required to realize the physics and technology goals of ITER, and projections of the DIII-D discharges are consistent with ITER achieving its goals of {ge} 400 MW of fusion power production and Q {ge} 10. These studies also address many of the key physics issues related to the ITER design, including the L-H transition power threshold, the size of ELMs, pedestal parameter scaling, the impact of tearing modes on confinement and disruptivity, beta limits and the required capabilities of the plasma control system. An example of direct influence on the ITER design from this work is a modification of the specified operating range in internal inductance at 15 MA for the poloidal field coil set, based on observations that the measured inductance in the baseline scenario case lay outside the original ITER specification.
Shattered Pellet Disruption Mitigation Technology Development for ITER
Baylor, Larry R [ORNL; Combs, Stephen Kirk [ORNL; Jernigan, T. C. [Oak Ridge National Laboratory (ORNL); Meitner, Steven J [ORNL; Edgemon, Timothy D [ORNL; Parks, P. B. [General Atomics; Commaux, Nicolas JC [ORNL; Maruyama, S. [ITER International Team, Garching, Germany; Caughman, John B [ORNL; Rasmussen, David A [ORNL
2010-01-01T23:59:59.000Z
The mitigation of first wall thermal and mechanical loads and damage from runaway electrons during disruptions are critical for successful long term operation of ITER. Disruption mitigation tools based on shattered pellet injection are being developed at Oak Ridge National Laboratory that can be employed on ITER to provide the necessary mitigation of thermal and mechanical loads from disruptions as well as provide collisional damping to inhibit the formation of runaway electrons . Here we present progress on the development of the technology to provide reliable disruption mitigation with large shattered cryogenic pellets. An example of how this concept can be employed on ITER is discussed.
A. Chakrabarti
1998-01-05T23:59:59.000Z
An iterative map of the unit disc in the complex plane (Appendix) is used to explore certain aspects of selfdual, four dimensional gauge fields (quasi)periodic in the Euclidean time. These fields are characterized by two topological numbers and contain standard instantons and monopoles as different limits. The iterations do not correspond directly to a discretized time evolution of the gauge fields. They are implemented in an indirect fashion. First, (t,r,\\theta,\\phi) being the standard coordinates, the (r,t) half plane is mapped on the unit disc in an appropriate way. This provides an (r,t) parametrization (Sec.1) of Z_0, the starting point of the iterations and makes the iterates increasingly complex functions of r and t. These are then incorporated as building blocks in the generating function of the fields (Sec.2). We explain (starting in Sec.1 and at different stages) in what sense and to what extent some remarkable features of our map (indicated in the title) are thus carried over into the continuous time development of the fields. Special features for quasiperiodicity are studied (Sec.3). Spinor solutions (Sec.4) and propagators (Sec.5) are discussed from the point of view of the mapping. Several possible generalizations are indicated (Sec.6). Some broader topics are discussd in conclusion (Sec.7).
Khan, Kamran-Ahmed
2009-05-15T23:59:59.000Z
A recursive-iterative algorithm is developed for predicting nonlinear viscoelastic behaviors of isotropic materials that belong to the thermorheologically complex material (TCM). The algorithm is derived based on implicit stress integration...
Chilton, Sven; Chilton, Sven H.
2008-07-01T23:59:59.000Z
The WARP code is a robust electrostatic particle-in-cell simulation package used to model charged particle beams with strong space-charge forces. A fundamental operation associated with seeding detailed simulations of a beam transport channel is to generate initial conditions where the beam distribution is matched to the structure of a periodic focusing lattice. This is done by solving for periodic, matched solutions to a coupled set of ODEs called the Kapchinskij-Vladimirskij (KV) envelope equations, which describe the evolution of low-order beam moments subject to applied lattice focusing, space-charge defocusing, and thermal defocusing forces. Recently, an iterative numerical method was developed (Lund, Chilton, and Lee, Efficient computation of matched solutions to the KV envelope equations for periodic focusing lattices, Physical Review Special Topics-Accelerators and Beams 9, 064201 2006) to generate matching conditions in a highly flexible, convergent, and fail-safe manner. This method is extended and implemented in the WARP code as a Python package to vastly ease the setup of detailed simulations. In particular, the Python package accommodates any linear applied lattice focusing functions without skew coupling, and a more general set of beam parameter specifications than its predecessor. Lattice strength iteration tools were added to facilitate the implementation of problems with specific applied focusing strengths.
Evolution of Deixis: Personal Pronouns in an Iterated Learning Experiment
Komorowska, Krystyna
2012-11-28T23:59:59.000Z
To date, empirical research on language evolution has been based on entirely non-deictic languages. This study presents an experiment using the Iterated Learning Model to establish in what way deixis may affect process of ...
Design and analysis of iteratively decodable codes for ISI channels
Doan, Dung Ngoc
2005-11-01T23:59:59.000Z
Recent advancements in iterative processing have allowed communication systems to perform close to capacity limits withmanageable complexity.For manychannels such as the AWGN and ?at fading channels, codes that ...
AN ITERATIVE METHOD WITH CONVERGENCE RATE CHOSEN A PRIORI \\Lambda
Mandel, Jan
HEBERTON z , JAN MANDEL x AND PETR VAN Å¸ EK -- Abstract. With increasing demand for largeÂscale three. \\Lambda This paper was presented at the 1998 Copper Mountain Conference on Iterative Methods
Plans for U.S. Contributions to ITER
Physics Laboratory (New Jersey) · Electric Power Systems · Diagnostics Savannah River National Laboratory, but co-located U.S. ITER / Sauthoff Slide 4 #12;Oak Ridge National Laboratory (Tennessee), host lab
Project Manager, U.S. ITER INSIDE: ITER Site Progress Washington
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5(Million Cubic Feet) Oregon (Including Vehicle Fuel) (Million Cubic Feet)setsManagement Program Management The OakSite |ProjectProjectProjectITER
PPPL3246 Preprint: April 1997, UC420 THE PHYSICS ROLE OF ITER
scale plasma physics research. First and foremost, experiments in ITER will explore ``controlled ignition
Carmignani, B
2005-01-01T23:59:59.000Z
Numerical simulations of welds of thick steel pieces of interest for the thermonuclear fusion ITER machine
Inside ITER seminar on History of Fusion Page 1 History of Fusion
Union thermonuclear explosion 400kT #12;Inside ITER seminar on History of Fusion Page 4 Big IvanInside ITER seminar on History of Fusion Page 1 History of Fusion Personal view V. Chuyanov 9 July 2009 Special thanks to ITER Communication Division. #12;Inside ITER seminar on History of Fusion Page 2
Assessing the Power Requirements for Sawtooth Control in ITER Through Modelling and Joint Experiments
Exhibit 9RDF Technical Data -ITER UT-B Contracts Div Page 1 of 5
Pennycook, Steve
Exhibit 9RDF Â Technical Data - ITER UT-B Contracts Div Sept 2009 Page 1 of 5 ex9rdf-ITER-sept09.doc Exhibit 9RDF-ITER Ref: DEAR 970.5227-1 TECHNICAL DATA Â ITER (Sept 2009) 1. Rights in Data; (ii) Unlimited rights in Technical Data and Computer Software specifically used in the performa
25th SOFE, San Francisco, CA, June 11-14, 2013 2013, ITER Organization
Raffray, A. René
25th SOFE, San Francisco, CA, June 11-14, 2013 © 2013, ITER Organization Slide 1 ITER Blanket Engineering, San Francisco, CA, June 11-14, 2013 The views and opinions expressed herein do not necessarily reflect those of the ITER Organization #12;25th SOFE, San Francisco, CA, June 11-14, 2013 © 2013, ITER
Test blanket modules in ITER: An overview on proposed designs and required DEMO-relevant materials
Abdou, Mohamed
Test blanket modules in ITER: An overview on proposed designs and required DEMO-relevant materials, Russian Federation Abstract Within the framework of the ITER Test Blanket Working Group, the ITER Parties have made several proposals for test blanket modules to be tested in ITER from the first day of H
Electrostatic Dust Detection and Removal for ITER
C.H. Skinner; A. Campos; H. Kugel; J. Leisure; A.L. Roquemore; S. Wagner
2008-09-01T23:59:59.000Z
We present some recent results on two innovative applications of microelectronics technology to dust inventory measurement and dust removal in ITER. A novel device to detect the settling of dust particles on a remote surface has been developed in the laboratory. A circuit board with a grid of two interlocking conductive traces with 25 ?m spacing is biased to 30 – 50 V. Carbon particles landing on the energized grid create a transient short circuit. The current flowing through the short circuit creates a voltage pulse that is recorded by standard nuclear counting electronics and the total number of counts is related to the mass of dust impinging on the grid. The particles typically vaporize in a few seconds restoring the previous voltage standoff. Experience on NSTX however, showed that in a tokamak environment it was still possible for large particles or fibers to remain on the grid causing a long term short circuit. We report on the development of a gas puff system that uses helium to clear such particles. Experiments with varying nozzle designs, backing pressures, puff durations, and exit flow orientations have given an optimal configuration that effectively removes particles from an area up to 25 cm² with a single nozzle. In a separate experiment we are developing an advanced circuit grid of three interlocking traces that can generate a miniature electrostatic traveling wave for transporting dust to a suitable exit port. We have fabricated such a 3-pole circuit board with 25 micron insulated traces that operates with voltages up to 200 V. Recent results showed motion of dust particles with the application of only 50 V bias voltage. Such a device could potentially remove dust continuously without dedicated interventions and without loss of machine availability for plasma operations.
Robust parallel iterative solvers for linear and least-squares problems, Final Technical Report
Saad, Yousef
2014-01-16T23:59:59.000Z
The primary goal of this project is to study and develop robust iterative methods for solving linear systems of equations and least squares systems. The focus of the Minnesota team is on algorithms development, robustness issues, and on tests and validation of the methods on realistic problems. 1. The project begun with an investigation on how to practically update a preconditioner obtained from an ILU-type factorization, when the coefficient matrix changes. 2. We investigated strategies to improve robustness in parallel preconditioners in a specific case of a PDE with discontinuous coefficients. 3. We explored ways to adapt standard preconditioners for solving linear systems arising from the Helmholtz equation. These are often difficult linear systems to solve by iterative methods. 4. We have also worked on purely theoretical issues related to the analysis of Krylov subspace methods for linear systems. 5. We developed an effective strategy for performing ILU factorizations for the case when the matrix is highly indefinite. The strategy uses shifting in some optimal way. The method was extended to the solution of Helmholtz equations by using complex shifts, yielding very good results in many cases. 6. We addressed the difficult problem of preconditioning sparse systems of equations on GPUs. 7. A by-product of the above work is a software package consisting of an iterative solver library for GPUs based on CUDA. This was made publicly available. It was the first such library that offers complete iterative solvers for GPUs. 8. We considered another form of ILU which blends coarsening techniques from Multigrid with algebraic multilevel methods. 9. We have released a new version on our parallel solver - called pARMS [new version is version 3]. As part of this we have tested the code in complex settings - including the solution of Maxwell and Helmholtz equations and for a problem of crystal growth.10. As an application of polynomial preconditioning we considered the problem of evaluating f(A)v which arises in statistical sampling. 11. As an application to the methods we developed, we tackled the problem of computing the diagonal of the inverse of a matrix. This arises in statistical applications as well as in many applications in physics. We explored probing methods as well as domain-decomposition type methods. 12. A collaboration with researchers from Toulouse, France, considered the important problem of computing the Schur complement in a domain-decomposition approach. 13. We explored new ways of preconditioning linear systems, based on low-rank approximations.
Combs, Stephen Kirk [ORNL; Baylor, Larry R [ORNL; Caughman, John B [ORNL; Fehling, Dan T [ORNL; Foust, Charles R [ORNL; Maruyama, S. [ITER International Team, Garching, Germany; McGill, James M [ORNL; Rasmussen, David A [ORNL
2006-01-01T23:59:59.000Z
Injection of solid hydrogen pellets from the magnetic high-field side will be the primary technique for depositing fuel particles into the core of International Thermonuclear Experimental Reactor (ITER) burning plasmas. This injection scheme will require the use of a curved guide tube to route the pellets from the acceleration device, under the divertor, and to the inside wall launch location. In an initial series of pellet tests in support of ITER, single 5.3-mm-diam cylindrical D2 pellets were shot through a mock-up of the planned ITER curved guide tube. Those data showed that the pellet speed had to be limited to ?300 m/s for reliable delivery of intact pellets. Also, microwave cavity mass detectors located upstream and downstream of the test tube indicated that ?10% of the pellet mass was lost in the guide tube at 300 m/s. The tube base pressure for that test series was ?10-4 torr. However, for steady-state pellet fueling on ITER, the guide tube will operate at an elevated pressure due to the pellet erosion in the tube. Assuming the present design values for ITER pellet fueling rates/vacuum pumping and a 10% pellet mass loss during flight in the tube, calculations suggest a steadystate operating pressure in the range of 10-20 torr. Thus, experiments to ascertain the pellet integrity and mass loss under these conditions have been carried out. Also, some limited test data were collected at a tube pressure of ?100 torr. No significant detrimental effects have been observed at the higher tube pressures. The new test results are presented and compared to the baseline data previously reported.
ITER Physics and Exploring Magnetically-Confined
with Early Integration of Physics and Technology Ned Sauthoff April 4, 2005 #12;Plasma self-heating D+ + T+ 4He++ (3.5 MeV) + n0 (14.1 MeV) Key Science Topics of Burning Plasmas: Self-heating and self: low- *, low- *, isotopic- 's, self-heated/self-organized, low rotation · MHD is not a fundamental
EXECUTIVE SUMMARY: Integrative Solutions for a
Hayden, Nancy J.
-ecological systems. We at the University of Vermont, as members of an institution that is already a nationally by Vermont's Green Mountains to the east and New York's Adirondack Mountains to the West. It is grounded, Vermont, the Nation, and the world. Photo credit: University of Vermont 2006 Campus Master Plan #12
Integrated Energy Solutions LLC | Open Energy Information
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousPlasmaP a gHigh Plains Wind Farm Jump to:Indianapolis, Indiana:Page Edit
Numerical solution of the inversion integral
Bradford, Halley Oren
1964-01-01T23:59:59.000Z
( t & T and if both fcnctions sxe oi" exponential order, then there exists same k & 0, snch that f(s) is of oWr s (i. e. 1im s f(s) & M, M & 0). s~ ee Theorem IY. The limiting valnes of F(t) and its corresponding XaP1am transform, if it exists, are given by lim... particular source. 2 le* ???? . A c??z * ?er ??????a???r??raa. imaginary, oi" the form x + iy, where x aml y are real numbers scd. i -l. d complex number is an imaginary number when y p O and a 2 pure isisginsry number when x O aud y P O. Absolute value...
INTEGRATED SOLUTIONS FROM NATURE PUBLISHING GROUP
Cai, Long
8765 India T: +91 12 4288 1057 Greater China/Singapore T: +852 2811 7191 Middle East T: +44 (0)20 7843 4015 Japan T: +81 3 3267 8765 India T: +91 12 4288 1057 Greater China/Singapore T: +852 2811 7191 Middle East T: +44 (0)20 7843 4922 E-mail: natureevents@nature.com Academia 70% Corporate 14% Gov
Development and Integration Issues and Solutions
V S ubestación de distribución Qualified consumers Outages Ancillary Services Spanish Electrical System of lines and 60000 MW of transforming capacity FREE- FLOAT 80% SEPI: Spanish Stated Owned Holding Company demand Spanish peak demands 45 GW and offpeak demands of 1925 GW. Maximum demand 41318 MW 13:26 h 19
2011-03-27T23:59:59.000Z
MA 261 - Quiz 7 (20 minutes). Tuesday, March 8, 2011. Solution. Statistics (out of 20): Section. 23. 24. Average. 14.4 13.4. Standard Deviation 4.5. 4.6. Median.
ITER physics design guidelines at high aspect ratio
Uckan, N.A.
1991-01-01T23:59:59.000Z
The physics requirements for ITER design are formulated in a set of physics design guidelines. These guidelines, established by the ITER Physics Group during the Conceptual Design Activity (CDA, 1988--90), were based on credible extrapolations of the tokamak physics database as assessed during the CDA, and defined a class of tokamak designs (with plasma current I {approximately}20 MA and aspect ratio A {approximately}2.5--3.5) that meet the ITER objectives. Recent US studies have indicated that there may be significant benefits if the ITER-CDA design point is moved from the low aspect ratio, high current baseline (A = 2.79, I = 22 MA) to a high aspect ratio machine at A {approximately}4, I {approximately}15 MA, especially regarding steady-state, technology-testing performance. To adequately assess the physics and technology testing capability of higher aspect ratio design options, several changes are proposed to the original ITER guidelines to reflect the latest (although limited) developments in physics understanding at higher aspect ratios. The critical issues for higher aspect ratio design options are the uncertainty in scaling of confinement with aspect ratio, the variation of vertical stability with elongation and aspect ratio, plasma shaping requirements, ability to control and maintain plasma current and q-profiles for MHD stability (and volt-second consumption), access for current drive, restrictions on field ripple and divertor plate incident angles, etc. 5 refs., 1 tab.
Noncommutative integrable systems and quasideterminants
Hamanaka, Masashi [Department of Mathematics, Nagoya University, Chikusa-ku, Nagoya, 464-8602 (Japan)
2010-03-08T23:59:59.000Z
We discuss extension of soliton theories and integrable systems into noncommutative spaces. In the framework of noncommutative integrable hierarchy, we give infinite conserved quantities and exact soliton solutions for many noncommutative integrable equations, which are represented in terms of Strachan's products and quasi-determinants, respectively. We also present a relation to an noncommutative anti-self-dual Yang-Mills equation, and make comments on how 'integrability' should be considered in noncommutative spaces.
Kerby, L.A. [Calpine Corp., San Jose, CA (United States)
1995-11-01T23:59:59.000Z
A continuing challenge facing the independent power industry is building better plants at lower cost. Price considerations have forced many developers to re-focus their capabilities to create viable, new alternatives to traditional turnkey project contracts. Prompted by such pressures, Calpine Corp. recently created its own internal, integrated solution to project development which provides more control and input for a project owner and manager while establishing a solid set of guarantees to non-recourse lenders through a program of warranties and overall insurance coverage. The proof case for Calpine-Construct is the Sumas Project, a 125 MW gas-fired cogeneration plant in Sumas, WA, near the Canadian border. The Sumas project demonstrates how owners, suppliers and contractors, working together on site, can be readily able to solve construction problems.
Diamond neutral particle spectrometer for fusion reactor ITER
Krasilnikov, V.; Amosov, V.; Kaschuck, Yu.; Skopintsev, D. [Institution PROJECT CENTER ITER, 1, Akademik Kurchatov Sq., Moscow (Russian Federation)
2014-08-21T23:59:59.000Z
A compact diamond neutral particle spectrometer with digital signal processing has been developed for fast charge-exchange atoms and neutrons measurements at ITER fusion reactor conditions. This spectrometer will play supplementary role for Neutral Particle Analyzer providing 10 ms time and 30 keV energy resolutions for fast particle spectra in non-tritium ITER phase. These data will also be implemented for independent studies of fast ions distribution function evolution in various plasma scenarios with the formation of a single fraction of high-energy ions. In tritium ITER phase the DNPS will measure 14 MeV neutrons spectra. The spectrometer with digital signal processing can operate at peak counting rates reaching a value of 10{sup 6} cps. Diamond neutral particle spectrometer is applicable to future fusion reactors due to its high radiation hardness, fast response and high energy resolution.
Description of the prototype diagnostic residual gas analyzer for ITER
Younkin, T. R., E-mail: tyounkin@gatech.edu [Fusion and Materials for Nuclear Systems Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169 (United States); Georgia Institute of Technology, Woodruff School of Mechanical Engineering – Nuclear and Radiological Engineering Program, Atlanta, Georgia 30332 (United States); Biewer, T. M.; Klepper, C. C.; Marcus, C. [Fusion and Materials for Nuclear Systems Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169 (United States)
2014-11-15T23:59:59.000Z
The diagnostic residual gas analyzer (DRGA) system to be used during ITER tokamak operation is being designed at Oak Ridge National Laboratory to measure fuel ratios (deuterium and tritium), fusion ash (helium), and impurities in the plasma. The eventual purpose of this instrument is for machine protection, basic control, and physics on ITER. Prototyping is ongoing to optimize the hardware setup and measurement capabilities. The DRGA prototype is comprised of a vacuum system and measurement technologies that will overlap to meet ITER measurement requirements. Three technologies included in this diagnostic are a quadrupole mass spectrometer, an ion trap mass spectrometer, and an optical penning gauge that are designed to document relative and absolute gas concentrations.
The influence of an ITER-like wall on disruptions at JET
Vries, P. C. de, E-mail: Peter.de.Vries@jet.efda.org; Hogeweij, G. M. D. [FOM institute DIFFER, EURATOM association, P.O. Box 1207, Nieuwegein (Netherlands)] [FOM institute DIFFER, EURATOM association, P.O. Box 1207, Nieuwegein (Netherlands); Baruzzo, M.; Murari, A. [Consorzio RFX, EURATOM-ENEA Association, Corso Stati Uniti 4, 35127 Padova (Italy)] [Consorzio RFX, EURATOM-ENEA Association, Corso Stati Uniti 4, 35127 Padova (Italy); Jachmich, S. [ERM/KMS, Association EURATOM-Belgian State, B-1000 Brussels, Brussels (Belgium)] [ERM/KMS, Association EURATOM-Belgian State, B-1000 Brussels, Brussels (Belgium); Joffrin, E.; Reux, C. [IRFM-CEA, Centre de Cadarache, 13108 Sant-Paul-lez-Durance (France)] [IRFM-CEA, Centre de Cadarache, 13108 Sant-Paul-lez-Durance (France); Lomas, P. J.; Matthews, G. F. [CCFE/Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom)] [CCFE/Fusion Association, Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Nunes, I. [Associação EURATOM-IST, Instituto de Plasmas e Fusão Nuclear, 1049-001 Lisboa (Portugal)] [Associação EURATOM-IST, Instituto de Plasmas e Fusão Nuclear, 1049-001 Lisboa (Portugal); Pütterich, T. [Max-Planck-Institut für Plasmaphysik, EURATOM Association, 85748 Garching (Germany)] [Max-Planck-Institut für Plasmaphysik, EURATOM Association, 85748 Garching (Germany); Vega, J. [Asociación EURATOM/CIEMAT para Fusión, Madrid (Spain) [Asociación EURATOM/CIEMAT para Fusión, Madrid (Spain); JET-EFDA Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Collaboration: JET-EFDA Contributors
2014-05-15T23:59:59.000Z
In order to preserve the integrity of large tokamaks such as ITER, the number of disruptions has to be limited. JET has operated previously with a low frequency of disruptions (i.e., disruption rate) of 3.4% [P. C. de Vries et al., Nucl. Fusion 51, 053018 (2011)]. The start of operations with the new full-metal ITER-like wall at JET showed a marked rise in the disruption rate to 10%. A full survey was carried out to identify the root causes, the chain-of-events and classifying each disruption, similar to a previous analysis for carbon-wall operations. It showed the improvements made to avoid various disruption classes, but also indicated those disruption types responsible for the enhanced disruption rate. The latter can be mainly attributed to disruptions due to too high core radiation but also due to density control issues and error field locked modes. Detailed technical and physics understanding of disruption causes is essential for devising optimized strategies to avoid or mitigate these events.
Testability of non-autonomous two dimensional iterative logic array
Nagumo, Hideo
1991-01-01T23:59:59.000Z
' SCIENCE August III91 Major Subject: Electrical Engineering TESTABILITY OF NON-AUTONOMOUS T'A'0 DIMENSIONAL ITERATIVE LOGIC ARRAY A Thesis by HIDEO NAGUMO Approved as to style and content by: . . ed~ I(aran L. watson (Chair of Committee) Mi Lu... (Member) William G. Bliss (Member) Donald K. Friesen (Member) Jo Howze (Head of Department) August 1991 ABSTRACT Testability of i%on-Autonomous Two-Dimensional Iterative Logic Array. (August 1991) Hideo iX'agumo, B. S. , Shinshu University...
ON THE C-INTEGRAL BENEDETTO BONGIORNO
Talvila, Erik
ON THE C-INTEGRAL BENEDETTO BONGIORNO Let F : [a, b] R be a differentiable function and let f, the problem of primitives was solved by A. Denjoy with an integration process (called totalization) that includes the Lebesgue integral and the Riemann improper integral. Two years later, a second solution
ON THE C-INTEGRAL BENEDETTO BONGIORNO
Talvila, Erik
ON THE C-INTEGRAL BENEDETTO BONGIORNO Let F : [a; b] ! R be a di#11;erentiable function and let f, the problem of primitives was solved by A. Denjoy with an integration process (called totalization) that includes the Lebesgue integral and the Riemann improper integral. Two years later, a second solution
ISIS++Reference Guide (Iterative Scalable Implicit Solver in C++) Version 1.1
Alan B. Williams; Benjamin A. Allan; Kyran D. Mish; Robert L. Clay
1999-04-01T23:59:59.000Z
ISIS++ (Iterative Scalable Implicit Solver in C++) Version 1.1 is a portable, object-oriented framework for solving sparse linear systems of equations. It includes a collection of Krylov solution methods and preconditioners, as well as both uni-processor (serial) and multi-processor (scalable) matrix and vector classes. Though it was developed to solve systems of equations originating from large-scale, 3-D, finite element analyses, it has application in many other fields. This document supersedes the ISIS++ V1.0 Reference Guide, defines the V1. 1 interface specification, and includes the necessary instructions for building and running ISIS++ v 1.1 on Unix platforms. The interface is presented in annotated header format, along with background on design and implementation considerations. A finite difference modeling example problem is included to demonstrate the overall setup and use.
Brussels advocates a lone rider for ITER 09/22/2004 Edition
can advance alone to establish the thermonuclear reactor experimental ITER in Cadarache. France in the construction of the future experimental thermonuclear reactor ITER, if Brussels does not manage to convince
Fast Iterative Methods The Incompressible Navier-Stokes Equations
Vuik, Kees
, Pakistan Institute of Engineering and Applied Sciences, Quaid-i-Azam University Islamabad, Pakistan geboren te Kohat, Pakistan. #12;Dit proefschrift is goedgekeurd door de promotor: Prof.dr.ir. C. Vuik Commission (HEC) Pakistan. I thank them sincerely for their support. Fast Iterative Methods
Edge-Localized Iterative Reconstruction for Computed Tomography
1 Edge-Localized Iterative Reconstruction for Computed Tomography Zhou Yu Student Member, IEEE) can greatly improve the quality of computed tomography (CT) images. In particular, MBR can recover at significantly reduced computational cost. Index Terms--Computed tomography, model based reconstruc- tion
Edge-Localized Iterative Reconstruction for Computed Tomography
Edge-Localized Iterative Reconstruction for Computed Tomography Zhou Yu Student Member, IEEE, Jean the quality of computed tomography (CT) images. In particular, MBR can recover fine details and small features reduced computational cost. Index Terms--Computed tomography, model based reconstruc- tion, coordinate
The ins and outs of iteration in Mezzo Armal Guneau
study. 2. Algebraic data structures Thanks to algebraic data types, it is easy to define list- and tree and invokes a client-supplied function at every node: val iter: [a, s: perm] (f: ( a | s) -> bool, t: tree a | s) -> bool The function f has access to one tree element at a time: it receives a permission
Moldable Parallel Job Scheduling Using Job Efficiency: An Iterative Approach
Feitelson, Dror
Moldable Parallel Job Scheduling Using Job Efficiency: An Iterative Approach Gerald Sabin, Matthew OH 43201, USA, {sabin, langma, saday}@cse.ohio-state.edu Abstract. Currently, job schedulers require "rigid" job submissions from users, who must specify a particular number of processors for each paral
Fast non-iterative methods for defect identification
Guzina, Bojan
Fast non-iterative methods for defect identification Marc Bonnet -- Bojan B. Guzina -- Nicolas and topology by means of the concept of topological sensitivity. This approach leads to the fast computation is obtained by using fast multipole accelerated BEMs. Possibilities afforded by this approach are demon
ITERATIVE TOTAL VARIATION REGULARIZATION WITH NON-QUADRATIC FIDELITY
Burger, Martin
, AND STANLEY J. OSHER Abstract. A generalized iterative regularization procedure based on the total variation still eliminate high-frequency noise. However, the ROF model (1.1) has certain limitations. Meyer has with the norm ||w|| = inf g,w= ·g ess sup x |g(x)| , Meyer provided arguments in favour of considering elements
Wireless Multicasting via Iterative Optimization Lihua Wan and Jie Luo
Luo, J. Rockey
Wireless Multicasting via Iterative Optimization Lihua Wan and Jie Luo Electrical & Computer}@engr.colostate.edu Abstract-- A class of wireless multicast utility optimization problems are considered. Assume network in a wireless network can be characterized using a configuration graph. Network layer utility optimization can
PUBLISHED VERSION RF contact development for the ITER ICRH antenna
Cyclotron (IC) antenna design, ITER Organization requested qualification tests on sliding Radio contacts in relevant conditions (2.25kA @ 62.5MHz, vacuum pressure detailed with RF power tests for long shot duration (1000s) under vacuum and extensive sliding tests
AND THEIR PREDICTIONS FOR ITER D. R. MIKKELSEN
Hammett, Greg
15) Chalmers University of Technology, Göteborg, Sweden Abstract A number of proposed tokamak thermal transport models for several reasons. Firstly, to enhance our confidence in extrapolations of energy range of existing tokamak data. This has led to the development of the ITER Profile Database [2] which
Fusion project decision delayed ITER -NUCLEAR FUSION PROJECT
-free energy - but the reactor will take 10 years to build. Pros and cons Member countries of the International research facility and a more moderate climate. Iter consortium European Union United States Russia China the decision is highly political, involving huge amounts of horse-trading behind the scenes. Delegates were
Hierarchical Iterative Algorithm for a Coupled Constrained OSNR Nash Game
Pavel, Lacra
Hierarchical Iterative Algorithm for a Coupled Constrained OSNR Nash Game Lacra Pavel Department. A Nash game is formulated between channels with channel utility related to maximizing channel optical the coupled Nash game into a lower-level Nash game with no coupled constraints, and a higher-level link
Steady-state solution methods for open quantum optical systems
P. D. Nation
2015-04-25T23:59:59.000Z
We discuss the numerical solution methods available when solving for the steady-state density matrix of a time-independent open quantum optical system, where the system operators are expressed in a suitable basis representation as sparse matrices. In particular, we focus on the difficulties posed by the non-Hermitian structure of the Lindblad super operator, and the numerical techniques designed to mitigate these pitfalls. In addition, we introduce a doubly iterative inverse-power method that can give reduced memory and runtime requirements in situations where other iterative methods are limited due to poor bandwidth and profile reduction. The relevant methods are demonstrated on several prototypical quantum optical systems where it is found that iterative methods based on iLU factorization using reverse Cuthill-Mckee ordering tend to outperform other solution techniques in terms of both memory consumption and runtime as the size of the underlying Hilbert space increases. For eigenvalue solving, Krylov iterations using the stabilized bi-conjugate gradient method outperform generalized minimal residual methods. In contrast, minimal residual methods work best for solvers based on direct LU decomposition. This work serves as a guide for solving the steady-state density matrix of an arbitrary quantum optical system, and points to several avenues of future research that will extend the applicability of these classical algorithms in absence of a quantum computer.
Iterative Solution of Transonic Flows over Airfoils and Wings, Including Flows at Mach 1 ,
Jameson, Antony
for a yawed wing in [1], favor operation at low supersonic speeds in the range from Mach 1 to 1.3 (a regime of flows over airplane wings, including the case of flight at Mach 1. The mathematical difficulties at fairly low supersonic Mach numbers over efficient aerodynamic shapes, we may reasonably suppose
Heckrotte, Robert Platt
1964-01-01T23:59:59.000Z
OF THE I ECKNGRK PO( YNONIAL SUBROUTINE DIFEQ DINENSI 0}{ A(20o20) oX(20 ) oP(20 ~ 20) ~ C{20) oW{ 20) C 0)(NON A o X o P o C o N o K o ){ o NUN DINENS ION U(20) o V{20 } o Y(20) o2(20) oD {20) CONNON U o V o Y o Z o D o t AURA DINENS ION 0 (10) QQ...~loN 36 2{ 1)~tYt I)~fo){o(lo/Xt 1)~SINF{X{1 ))i'COSF(X( I)) I ~ ) QQ TO 26 4 DQ 38 foo)oN 3S Z(1 ) ~I o+ 1 Y( I )~I ~ )442 CQ TO 26 5 DO 40 I~I ~ N 40 Z{ I ) a(~1 or'4 ~ )4SQRTF {4o (Y{ I )+1 ~ )4{}2) QQ TO 26 6 DO 42 l&io6 42 Zt I )&X( I )+Yt I...
ITERATIVE SOLUTION OF A COUPLED MIXED AND STANDARD GALERKIN DISCRETIZATION METHOD FOR
Pasciak, Joseph
.S. Department of Energy by Lawrence Livermore National Laboratory under Contract W-7405-Eng-48. 1 #12; 2 RAYTCHO
Grossmann, Ignacio E.
to be installed/drilled, as well as the drilling schedule for the wells over the planning horizon. Continuous a number of potential locations for wells (W) to be drilled. Production Platform Well Platform Well into the formulation. Discrete decisions include the selection of production platforms, well platforms and wells
PPPL-3246 -Preprint: April 1997, UC-420 THE PHYSICS ROLE OF ITER
. INTRODUCTION The ITER plasma will provide a unique opportunity for reactor-scale plasma physics research. First
Exhibit 9 Technical Data ITER UT-B Contracts Div Page 1 of 5
Pennycook, Steve
Exhibit 9 Â Technical Data Â ITER UT-B Contracts Div June 2011 Page 1 of 5 ex9-ITER-june11.doc Exhibit 9 ITER Ref: DEAR 927.409; FAR 52.227-14, 52.227-14 Alt.V, 52.227-16 TECHNICAL DATA - ITER (June, or statements, regardless of the media in which recorded, that allow or cause a computer to perform a specific
CS680: Value Iteration for Mountain Cars Due Feb. 21 (SURGE March 6)
Anderson, Charles W.
CS680: Value Iteration for Mountain Cars Due Feb. 21 (SURGE March 6) Introduction iteration to solve this problem. The Mountain Car Problem The car lives in this 2d world: Goal The state transition model for the mountain car. 3. Perform asynchronous value iteration, defined in Equation (4
ITER & Fusion Research Reference: MEMO/10/165 Date: 05/05/2010
ITER & Fusion Research Reference: MEMO/10/165 Date: 05/05/2010 HTML: EN PDF: EN DOC: EN MEMO/10/165 Brussels, 5th May 2010 ITER & Fusion Research The Commission has adopted a Communication to the European for International Thermonuclear Experimental Reactor (ITER), which have more than doubled the costs for Europe (to
ITER Export Control Awareness Information UT-B Contracts Div. Page 1 of 8
ITER Export Control Awareness Information UT-B Contracts Div. June 2012 Page 1 of 8 Iter-export-control-Inform-ext-jun12.pdf ITER EXPORT CONTROL AWARENESS INFORMATION (June 2012) Commercial Vendors, Universities be aware of the export control requirements associated with exporting facilities, systems, subsystems
PUBLISHED VERSION Thermo-structural development of the ITER ICRF strap housing module
PUBLISHED VERSION Thermo-structural development of the ITER ICRF strap housing module K. Winkler, M at : http://dx.doi.org/10.1063/1.4864564 #12;Thermo-structural development of the ITER ICRF strap housing to IP: 194.81.223.66 On: Mon, 17 Feb 2014 11:42:59 #12;Thermo-structural Development of the ITER ICRF
ASSESSMENT OF THE DCLL TBM THERMOSTRUCTURAL RESPONSE BASED ON ITER DESIGN CRITERIA
Ghoniem, Nasr M.
codes (e.g., ASME Code4 and RCC-MR5 ). A detailed thermo-structural analysis of the DCLL TBM as safety important ITER components, they must fulfill all required ITER codes and standards for reliable performance under ITER normal operating conditions. II. DESIGN CODE PURPOSE The primary purpose of structural
for terminating US participation in ITER, but House spending bill would increase funding above administration is stifling research, science board warns Senate appropriators approved a bill last week that would order by the subcommittee on energy and water development, would allow just $75 million to pay for contracts that have
EUROfusion effort in code development for integrated modelling
Princeton Plasma Physics Laboratory
of electric power by DEMO by 2050: importance of IM EUROfusion (29 EU Research Units (RUs)): - ITER Physics, ...) Mission 2: Heat Exhaust System (detachment control, PFC, divertor/SOL modelling, ...) Mission 8EUROfusion effort in code development for integrated modelling Presented by Irina Voitsekhovitch
Bailey, David H.; Borwein, Jonathan M.; Crandall, Richard E.
2006-01-01T23:59:59.000Z
Box integrals D.H. Bailey ? J.M. Borwein † April 3,Abstract. By a “box integral” we mean here an expectation |r· dr n . The study of box integrals leads one naturally into
Paris-Sud XI, Université de
- gered species under global change, yet adaptive management problems suffer from a poor suite of solutionMOMDPs: a Solution for Modelling Adaptive Management Problems Iadine Chad`es and Josie Carwardine and natural resource management, adaptive management is an iterative process of improving management
TRIPLE INTEGRALS Studying triple integrals
Knopf, Dan
TRIPLE INTEGRALS Studying triple integrals of functions of three variables is a natural step up from the two variable case. It's a very important one for applications. Now the domain of integration in 3- space as double integrals, which in turn were expressed as repeated integrals. As a result
Jang, Kwang Eun; Lee, Jongha; Sung, Younghun; Lee, SeongDeok [Advanced Media Laboratory, Samsung Advanced Institute of Technology (SAIT), San 14, Nongseo Dong, Giheung Gu, Yongin, Gyeonggi 446-712 (Korea, Republic of)] [Advanced Media Laboratory, Samsung Advanced Institute of Technology (SAIT), San 14, Nongseo Dong, Giheung Gu, Yongin, Gyeonggi 446-712 (Korea, Republic of)
2013-09-15T23:59:59.000Z
Purpose: X-ray photons generated from a typical x-ray source for clinical applications exhibit a broad range of wavelengths, and the interactions between individual particles and biological substances depend on particles' energy levels. Most existing reconstruction methods for transmission tomography, however, neglect this polychromatic nature of measurements and rely on the monochromatic approximation. In this study, we developed a new family of iterative methods that incorporates the exact polychromatic model into tomographic image recovery, which improves the accuracy and quality of reconstruction.Methods: The generalized information-theoretic discrepancy (GID) was employed as a new metric for quantifying the distance between the measured and synthetic data. By using special features of the GID, the objective function for polychromatic reconstruction which contains a double integral over the wavelength and the trajectory of incident x-rays was simplified to a paraboloidal form without using the monochromatic approximation. More specifically, the original GID was replaced with a surrogate function with two auxiliary, energy-dependent variables. Subsequently, the alternating minimization technique was applied to solve the double minimization problem. Based on the optimization transfer principle, the objective function was further simplified to the paraboloidal equation, which leads to a closed-form update formula. Numerical experiments on the beam-hardening correction and material-selective reconstruction were conducted to compare and assess the performance of conventional methods and the proposed algorithms.Results: The authors found that the GID determines the distance between its two arguments in a flexible manner. In this study, three groups of GIDs with distinct data representations were considered. The authors demonstrated that one type of GIDs that comprises “raw” data can be viewed as an extension of existing statistical reconstructions; under a particular condition, the GID is equivalent to the Poisson log-likelihood function. The newly proposed GIDs of the other two categories consist of log-transformed measurements, which have the advantage of imposing linearized penalties over multiple discrepancies. For all proposed variants of the GID, the aforementioned strategy was used to obtain a closed-form update equation. Even though it is based on the exact polychromatic model, the derived algorithm bears a structural resemblance to conventional methods based on the monochromatic approximation. The authors named the proposed approach as information-theoretic discrepancy based iterative reconstructions (IDIR). In numerical experiments, IDIR with raw data converged faster than previously known statistical reconstruction methods. IDIR with log-transformed data exhibited superior reconstruction quality and faster convergence speed compared with conventional methods and their variants.Conclusions: The authors' new framework for tomographic reconstruction allows iterative inversion of the polychromatic data model. The primary departure from the traditional iterative reconstruction was the employment of the GID as a new metric for quantifying the inconsistency between the measured and synthetic data. The proposed methods outperformed not only conventional methods based on the monochromatic approximation but also those based on the polychromatic model. The authors have observed that the GID is a very flexible means to design an objective function for iterative reconstructions. Hence, the authors expect that the proposed IDIR framework will also be applicable to other challenging tasks.
Pellet Fueling and Control of Burning Plasmas in ITER
Baylor, Larry R [ORNL; Parks, P. B. [General Atomics; Jernigan, Thomas C [ORNL; Caughman, John B [ORNL; Combs, Stephen Kirk [ORNL; Foust, Charles R [ORNL; Houlberg, Wayne A [ORNL; Maruyama, S. [ITER International Team, Garching, Germany; Rasmussen, David A [ORNL
2007-01-01T23:59:59.000Z
Pellet injection from the inner wall is planned for use on ITER as the primary core fueling system since gas fueling is expected to be highly inefficient in burning plasmas. Tests of the inner wall guide tube have shown that 5mm pellets with up to 300 m/s speeds can survive intact and provide the necessary core fueling rate. Modeling and extrapolation of the inner wall pellet injection experiments from today's smaller tokamaks leads to the prediction that this method will provide efficient core fueling beyond the pedestal region. Using pellets for triggering of frequent small edge localized modes is an attractive additional benefit that the pellet injection system can provide. A description of the ITER pellet injection system capabilities for fueling and ELM triggering are presented and performance expectations and fusion power control aspects are discussed.
Feedback stabilisation of switched systems via iterative approximate eigenvector assignment
Haimovich, Hernan
2010-01-01T23:59:59.000Z
This paper presents and implements an iterative feedback design algorithm for stabilisation of discrete-time switched systems under arbitrary switching regimes. The algorithm seeks state feedback gains so that the closed-loop switching system admits a common quadratic Lyapunov function (CQLF) and hence is uniformly globally exponentially stable. Although the feedback design problem considered can be solved directly via linear matrix inequalities (LMIs), direct application of LMIs for feedback design does not provide information on closed-loop system structure. In contrast, the feedback matrices computed by the proposed algorithm assign closed-loop structure approximating that required to satisfy Lie-algebraic conditions that guarantee existence of a CQLF. The main contribution of the paper is to provide, for single-input systems, a numerical implementation of the algorithm based on iterative approximate common eigenvector assignment, and to establish cases where such algorithm is guaranteed to succeed. We inc...
Progress and present status of ITER cryoline system
Badgujar, S.; Bonneton, M.; Chalifour, M.; Forgeas, A.; Serio, L. [ITER Organization, Route de Vinon sur Verdon, 13115 St. Paul lez Durance (France); Sarkar, B.; Shah, N. [ITER-India, Institute for Plasma Research, Bhat, Gandhinagar 382428 (India)
2014-01-29T23:59:59.000Z
The cryoline system at ITER forms a very complex network localized inside the Tokamak building, on a dedicated plant bridge and in cryoplant areas. The cooling power produced in the cryoplant is distributed via these lines with a total length of about 3.7 km and interconnecting all the cold boxes of the cryogenic system as well as the cold boxes of various clients (magnets, cryopumps and thermal shield). Distinct layouts and polygonal geometry, nuclear safety and confinement requirements, difficult installation and in-service inspection/repair demand very high reliability and availability for the cryolines. The finalization of the building-embedded plates for supporting the lines, before the detailed design, has made this project technologically more challenging. The conceptual design phase has been completed and procurement arrangements have been signed with India, responsible for providing the system of cryolines and warm lines to ITER, as in kind contribution. The prototype test for the design and performance validation has been planned on a representative cryoline section. After describing the basic features and general layout of the ITER cryolines, the paper presents key design requirements, conceptual design approach, progress and status of the cryolines project as well as challenges to build such a complex cryoline system.
Qualification of the Joints for the ITER Central Solenoid
Martovetsky, N; Berryhill, A; Kenney, S
2011-09-01T23:59:59.000Z
The ITER Central Solenoid has 36 interpancake joints, 12 bus joints, and 12 feeder joints in the magnet. The joints are required to have resistance below 4 nOhm at 45 kA at 4.5 K. The US ITER Project Office developed two different types of interpancake joints with some variations in details in order to find a better design, qualify the joints, and establish a fabrication process. We built and tested four samples of the sintered joints and two samples with butt-bonded joints (a total of eight joints). Both designs met the specifications. Results of the joint development, test results, and selection of the baseline design are presented and discussed in the paper. The ITER Central Solenoid (CS) consists of six modules. Each module is composed of six wound hexapancakes and one quadrapancake. The multipancakes are connected electrically and hydraulically by in-line interpancake joints. The joints are located at the outside diameter (OD) of the module. Cable in conduit conductor (CICC) high-current joints are critical elements in the CICC magnets. In addition to low resistivity, the CS joints must fit a space envelope equivalent to the regular conductor cross section and must have low hydraulic impedance and enough structural strength to withstand the hoop and compressive forces during operation, including cycling. This paper is the continuation of the work reported on the intermodule joints.
FOHI-D: An iterative Hirshfeld procedure including atomic dipoles
Geldof, D.; Blockhuys, F.; Van Alsenoy, C. [Department of Chemistry, University of Antwerp, Universiteitsplein 1, B2610 Antwerp (Belgium)] [Department of Chemistry, University of Antwerp, Universiteitsplein 1, B2610 Antwerp (Belgium); Krishtal, A. [Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, D-67663 Kaiserslautern (Germany)] [Fachbereich Chemie, Technische Universität Kaiserslautern, Erwin Schrödinger Straße, D-67663 Kaiserslautern (Germany)
2014-04-14T23:59:59.000Z
In this work, a new partitioning method based on the FOHI method (fractional occupation Hirshfeld-I method) will be discussed. The new FOHI-D method uses an iterative scheme in which both the atomic charge and atomic dipole are calculated self-consistently. In order to induce the dipole moment on the atom, an electric field is applied during the atomic SCF calculations. Based on two sets of molecules, the atomic charge and intrinsic atomic dipole moment of hydrogen and chlorine atoms are compared using the iterative Hirshfeld (HI) method, the iterative Stockholder atoms (ISA) method, the FOHI method, and the FOHI-D method. The results obtained are further analyzed as a function of the group electronegativity of Boyd et al. [J. Am. Chem. Soc. 110, 4182 (1988); Boyd et al., J. Am. Chem. Soc. 114, 1652 (1992)] and De Proft et al. [J. Phys. Chem. 97, 1826 (1993)]. The molecular electrostatic potential (ESP) based on the HI, ISA, FOHI, and FOHI-D charges is compared with the ab initio ESP. Finally, the effect of adding HI, ISA, FOHI, and FOHI-D atomic dipoles to the multipole expansion as a function of the precision of the ESP is analyzed.
Modeling Results For the ITER Cryogenic Fore Pump. Final Report
Pfotenhauer, John M. [University of Wisconsin, Madison, WI (United States); Zhang, Dongsheng [University of Wisconsin, Madison, WI (United States)
2014-03-31T23:59:59.000Z
A numerical model characterizing the operation of a cryogenic fore-pump (CFP) for ITER has been developed at the University of Wisconsin – Madison during the period from March 15, 2011 through June 30, 2014. The purpose of the ITER-CFP is to separate hydrogen isotopes from helium gas, both making up the exhaust components from the ITER reactor. The model explicitly determines the amount of hydrogen that is captured by the supercritical-helium-cooled pump as a function of the inlet temperature of the supercritical helium, its flow rate, and the inlet conditions of the hydrogen gas flow. Furthermore the model computes the location and amount of hydrogen captured in the pump as a function of time. Throughout the model’s development, and as a calibration check for its results, it has been extensively compared with the measurements of a CFP prototype tested at Oak Ridge National Lab. The results of the model demonstrate that the quantity of captured hydrogen is very sensitive to the inlet temperature of the helium coolant on the outside of the cryopump. Furthermore, the model can be utilized to refine those tests, and suggests methods that could be incorporated in the testing to enhance the usefulness of the measured data.
http://eprint.iacr.org/2006/384.pdf Design and Analysis of a Hash Ring-iterative Structure*
International Association for Cryptologic Research (IACR)
http://eprint.iacr.org/2006/384.pdf 1 Design and Analysis of a Hash Ring-iterative Structure, and SHA-1 [1] for example adopt the Merkle-DamgÃ¥rd (MD) iterative structure [2][3] . The design principle function, but also on a collision-free iteration structure. 2 Design of Hash Ring-iterative Structures 2
Impacts of pellets injected from the low-field side on plasma in ITER
Wisitsorasak, A. [Mahidol University, Faculty of Science (Thailand); Onjun, T. [Thammasat University, School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology (Thailand)
2011-01-15T23:59:59.000Z
Impacts of pellets injected from the low-field side (LFS) on plasma in ITER are investigated using the 1.5D BALDUR integrated predictive modeling code. In these simulations, the pellet ablation is described using the neutral gas shielding (NGS) model. The pellet ablation model is coupled with the plasma core transport model, which is a combination of the MMM95 anomalous transport model and NCLASS neoclassical transport model. The boundary conditions are assumed to be at the top of the pedestal, in which the pedestal parameters are predicted using a pedestal model based on the theoretical-based pedestal width scaling (either magnetic and flow shear stabilization width scaling, or flow shear stabilization width scaling, or normalized poloidal pressure width scaling) and the infinite-n ballooning mode pressure gradient limit. These pedestal models depend sensitively on the density at the top of the pedestal, which can be strongly influenced by the injection of pellets. The combination of the MMM95 and NCLASS models, together with the pedestal and NGS models, is used to simulate the time evolution of the plasma current, ion and electron temperatures, and density profiles for ITER standard type-I ELMy H-mode discharges during the injection of LFS pellets. It is found that the injection of pellets results in a complicated plasma scenario, especially in the outer region of the plasma and the plasma conditions at the boundary in which the pellet has an impact on increasing the plasma edge density, but reducing the plasma edge temperature. The LFS pellet has a stronger impact on the edge as compared to the center. For fusion performance, the pellet can result in either enhancement or degradation, depending sensitively on the pellet parameters; such as the pellet size, pellet velocity, and pellet frequency. For example, when a series of deuterium pellets with a size of 0.5 cm, velocity of 1 km/s, and frequency of 2 Hz are injected into the ITER plasma from the LFS, the plasma performance, evaluated in terms of Q{sub fusion}, can increase to 72% of that before the use of pellets. It is also found that the injection of pellets results in an increase in the ion and electron densities, but does not enhance the central plasma density. On the other hand, it results in the formation of another peak of the plasma density in the outer region near the plasma edge. The formation of the density peak results in the reduction of plasma transports near the edge by decreasing the contributions of ion-temperature-gradient and trapped electron modes, as well as kinetic ballooning modes.
Saha, Krishnendu [Ohio Medical Physics Consulting, Dublin, Ohio 43017 (United States); Straus, Kenneth J.; Glick, Stephen J. [Department of Radiology, University of Massachusetts Medical School, Worcester, Massachusetts 01655 (United States); Chen, Yu. [Department of Radiation Oncology, Columbia University, New York, New York 10032 (United States)
2014-08-28T23:59:59.000Z
To maximize sensitivity, it is desirable that ring Positron Emission Tomography (PET) systems dedicated for imaging the breast have a small bore. Unfortunately, due to parallax error this causes substantial degradation in spatial resolution for objects near the periphery of the breast. In this work, a framework for computing and incorporating an accurate system matrix into iterative reconstruction is presented in an effort to reduce spatial resolution degradation towards the periphery of the breast. The GATE Monte Carlo Simulation software was utilized to accurately model the system matrix for a breast PET system. A strategy for increasing the count statistics in the system matrix computation and for reducing the system element storage space was used by calculating only a subset of matrix elements and then estimating the rest of the elements by using the geometric symmetry of the cylindrical scanner. To implement this strategy, polar voxel basis functions were used to represent the object, resulting in a block-circulant system matrix. Simulation studies using a breast PET scanner model with ring geometry demonstrated improved contrast at 45% reduced noise level and 1.5 to 3 times resolution performance improvement when compared to MLEM reconstruction using a simple line-integral model. The GATE based system matrix reconstruction technique promises to improve resolution and noise performance and reduce image distortion at FOV periphery compared to line-integral based system matrix reconstruction.
is supported in part by ONR and DARPA under contract N00014Â91ÂCÂ0195 to Honeywell and Computer Science Research Projects Agency, ONR, the U.S. Government or Honeywell. cial to the overall performance
Overview of ASDEX Upgrade Results Development of integrated operating scenarios for ITER
; HUT Helsinki, Espoo, Finland; VTT Technical Research Centre, Espoo, Finland; Plasma Physics Laboratory
An iterative method for solving Fredholm integral equations of the first kind
notes: Professor Alexander G. Ramm is an author of more than 580 papers, 2 patents, 12 monographs Visiting Professor supported by the Royal Academy of Engineering, invited 1 #12;plenary speaker
The Lamb-Bateman integral equation and the fractional derivatives
D. Babusci; G. Dattoli; D. Sacchetti
2010-06-08T23:59:59.000Z
The Lamb-Bateman integral equation was introduced to study the solitary wave diffraction and its solution was written in terms of an integral transform. We prove that it is essentially the Abel integral equation and its solution can be obtained using the formalism of fractional calculus.
Iterative Mechanism of Macrodiolide Formation in the Anticancer Compound Conglobatin
Zhou, Yongjun; Murphy, Annabel C.; Samborskyy, Markiyan; Prediger, Patricia; Dias, Luiz Carlos; Leadlay, Peter F.
2015-06-18T23:59:59.000Z
confirmation of the identity of the cloned cong locus. It also paves the way for future analysis and manipulation of the cluster in a convenient heterolo- gous strain. The efficiency with which the cong-bearing genome fragment was cloned from genomic DNA... elucidated by using 1D and 2D nuclear magnetic resonance (NMR) and high-resolution MS (Table S2; NMR data are shown in Supplemental Information).The chemical competence of 5 as an intermediate in conglo- batin formation in vitro strongly supports an iterative...
The impact of ELMs on the ITER divertor
Leonard, A.W.; Osborne, T.H.; Suttrop, W. [General Atomics, San Diego, CA (United States); Hermann, A. [Max Planck Inst. fuer Plasmaphysics, Garching (Germany); Itami, K. [Japan Atomic Energy Research Inst. (Japan); Lingertat, J. [JET Joint Undertaking, Abingdon (United Kingdom); Loarte, A. [Next European Torus, Garching (Germany)
1998-07-01T23:59:59.000Z
Edge-Localized-Modes (ELMs) are expected to present a significant transient flux of energy and particles to the ITER divertor. The threshold for ablation of the graphite target will be reached if the ELM transient exceeds Q/t{sup 1/2} {approximately} 45 MJ-m{sup {minus}2}-s{sup {minus}1/2} where Q is the ELM deposition energy density and t is the ELM deposition time. The ablation parameter in ITER can be determined by scaling four factors from present experiments: the ELM energy loss from the core plasma, the fraction of ELM energy deposited on the divertor target, the area of the ELM profile onto the target, and finally the time for the ELM deposition. Review of the ELM energy loss of Type 1 ELM data suggests an ITER ELM energy loss of 2--6% of the stored energy or 25--80 MJ. The fraction of heating power crossing the separatrix due to ELMs is nearly constant (20--40%) resulting in an inverse relationship between ELM amplitude and frequency. Measurements on DIII-D and ASDEX-Upgrade indicate that 50--80% of the ELM energy is deposited on the target. There is currently no evidence for a large fraction of the ELM energy being dissipated through radiation. Profiles of the ELM heat flux are typically 1--2 times the width of steady heat flux between ELMs, with the ELM amplitude usually larger on the inboard target. The ELM deposition time varies from about 0.1 ms in JET to as high as 1.0 ms in ASDEX-Upgrade and DIII-D. The ELM deposition time for ITER will depend upon the level of conductive versus convective transport determined by the ratio of energy to particles released by the ELM. Preliminary analysis suggests that large Type 1 ELMs for low recycling H-mode may exceed the ablation parameter by a factor of 5. Promising regimes with smaller ELMS have been found at other edge operational regimes, including high density with gas puffing, use of rf heating and operation with Type 3 ELMs.
Status of the ITER Tokamac Exhaust Process System
Office of Environmental Management (EM)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362 of Thomas P.Oil,J. B.DepartmentRenieSmartSpotlightingFebruaryDepartment ofReportthe ITER Tokamak
U.S. ITER | Princeton Plasma Physics Lab
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) | SciTech Connect Journal Article: X-rayContractforCentersSite FeedsSedimentsNCSUProjectInnovationâ€¹ SeeAboutITER
Progress on Gyrotrons for ITER and Future Fusion Reactors
Thumm, Manfred K. [Forschungszentrum Karlsruhe, Association EURATOM-FZK, Institut fuer Hochleistungsimpuls- und Mikrowettentechnik, D-76021 Karlsruhe (Germany) and Universitaet Karlsruhe, Institut fuer Hochfrequenztechnik und Elektronik, D-76131 Karlsruhe (Germany)
2009-11-26T23:59:59.000Z
The prototype of the Japan 170 GHz ITER gyrotron holds the energy and efficiency world record of 2.88 GJ (0.8 MW, 3600 s, 57%) with 55% efficiency at 1 MW, 800 s, whereas the Russian 170 GHz ITER prototype tube achieved 0.83 MW with a pulse duration of 203 s at 48% efficiency and 1 MW at 116 s and 52%. The record parameters of the European megawatt-class 140 GHz gyrotron for the Stellarator Wendelstein W7-X are: 0.92 MW output power at 1800 s pulse duration, almost 45% efficiency and 97.5% Gaussian mode purity. All these gyrotrons employ a cylindrical cavity, a quasi-optical output coupler, a synthetic diamond window and a single-stage depressed collector (SDC) for energy recovery. In coaxial cavities the existence of the longitudinally corrugated inner conductor reduces the problems of mode competition and limiting current, thus allowing one to use even higher order modes with lower Ohmic attenuation than in cylindrical cavities. Synthetic diamond windows with a transmission capability of 2 MW, continuous wave (CW) are feasible. In order to keep the number of the required gyrotrons and magnets as low as possible, to reduce the costs of the ITER 26 MW, 170 GHz ECRH system and to allow compact upper launchers for plasma stabilization, 2 MW mm-wave power per gyrotron tube is desirable. The FZK pre-prototype tube for an EU 170 GHz, 2 MW ITER gyrotron has achieved 1.8 MW at 28% efficiency (without depressed collector). Design studies for a 4 MW 170 GHz coaxial-cavity gyrotron with two synthetic diamond output windows and two 2 MW mm-wave output beams for future fusion reactors are currently being performed at FZK. The availability of sources with fast frequency tunability (several GHz s{sup -1}, tuning in 1.5-2.5% steps for about ten different frequencies) would permit the use of a simple, fixed, non-steerable mirror antenna for local current drive (ECCD) experiments and plasma stabilization. GYCOM in Russia develops in collaboration with IPP Garching and FZK an industrial, frequency-tunable 1 MW gyrotron with almost 50% efficiency (SDC) for ASDEX Upgrade. A four-frequency tube (105, 117, 127 and 140 GHz) delivered in 10 s pulses 0.7 MW at 105 GHz and 0.9 MW at 140 GHz. After the installation of a diamond Brewster window, the GYCOM group will operate this gyrotron also at the two intermediate frequencies.
BIFURCATED 3D EQUILIBRIA IN THE LHD AND ITER
Hudson, Stuart
-dimensional solution of an axially symmetric MHD problem. Shaping coils have been applied to reduce the aspect ratio
PISCES FY11 Research Highlight Tritium accumulation within the ITER vessel is expected vessel. Another possible technique to mitigate tritium accumulation in these codeposited surfaces
Page 1IDM UID: QZZERG 2015, ITER Organization TRANSP Users' Group Meeting, 23rd March 2015
Princeton Plasma Physics Laboratory
Supports Plasma Operations and Plasma Research Extensive set of "Use Cases" requiring broad spectrum and Plasma Research Contributed and validated by ITER Members · Workflow Engine To orchestrate execution
Application of the Asymptotic Iteration Method to a Perturbed Coulomb Model
Paolo Amore; Francisco M. Fernandez
2006-04-17T23:59:59.000Z
We show that the asymptotic iteration method converges and yields accurate energies for a perturbed Coulomb model. We also discuss alternative perturbation approaches to that model.
PPPL and ITER: Lab teams support the world's largest fusion experiment...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
port plugs inside the ITER tokamak. Included in the modular design are stainless steel components called diagnostic first walls that will directly face the plasma. These...
Rocco Duvenhage
2006-05-24T23:59:59.000Z
A framework analogous to path integrals in quantum physics is set up for abstract dynamical systems in a W*-algebraic setting. We consider spaces of evolutions, defined in a specific way, of a W*-algebra A as an analogue of spaces of classical paths, and show how integrals over such spaces, which we call ``evolution integrals'', lead to dynamics in a Hilbert space on a ``higher level'' which is viewed as an analogue of quantum dynamics obtained from path integrals. The measures with respect to which these integrals are performed are projection valued.
Multiple solutions of coupled-cluster equations for PPP model of [10]annulene
Podeszwa, R
2002-01-01T23:59:59.000Z
Multiple (real) solutions of the CC equations (corresponding to the CCD, ACP and ACPQ methods) are studied for the PPP model of [10]annulene, C_{10}H_{10}. The long-range electrostatic interactions are represented either by the Mataga--Nishimoto potential, or Pople's R^{-1} potential. The multiple solutions are obtained in a quasi-random manner, by generating a pool of starting amplitudes and applying a standard CC iterative procedure combined with Pulay's DIIS method. Several unexpected features of these solutions are uncovered, including the switching between two CCD solutions when moving between the weakly and strongly correlated regime of the PPP model with Pople's potential.
Assessment Of An Oblique ECE Diagnostic For ITER
Gary Taylor and Robert W. Harvey
2009-07-15T23:59:59.000Z
A systematic disagreement between the electron temperature measured by electron cyclotron emission (TECE) and laser Thomson scattering (TTS), that increases with TECE, is observed in JET and TFTR plasmas, such that TECE ~ 1.2 TTS when TECE ~ 10 keV. The disagreement is consistent with a non-Maxwellian distortion in the bulk electron momentum distribution. ITER is projected to operate with Te(0) ~ 20-40 keV so the disagreement between TECE and TTS could be > 50%, with significant physics implications. The GENRAY ray tracing code predicts that a two-view ECE system, with perpendicular and moderately oblique viewing antennas, would be sufficient to reconstruct a two-temperature bulk distribution. If the electron momentum distribution remains Maxwellian the moderately oblique view could still be used to measure Te(R). A viewing dump will not be required for the oblique view and plasma refraction will be minimal. The oblique view has a similar radial resolution to the perpendicular view, but with some reduction in radial coverage. Oblique viewing angles of up to 20o can be implemented without a major revision to the front end of the existing ITER ECE diagnostic design.
Chevron beam dump for ITER edge Thomson scattering system
Yatsuka, E.; Hatae, T.; Bassan, M.; Itami, K. [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan)] [Japan Atomic Energy Agency, 801-1 Mukoyama, Naka, Ibaraki 311-0193 (Japan); Vayakis, G. [ITER Organization, 13115 St Paul Lez Durance Cedex (France)] [ITER Organization, 13115 St Paul Lez Durance Cedex (France)
2013-10-15T23:59:59.000Z
This paper contains the design of the beam dump for the ITER edge Thomson scattering system and mainly concerns its lifetime under the harsh thermal and electromagnetic loads as well as tight space allocation. The lifetime was estimated from the multi-pulse laser-induced damage threshold. In order to extend its lifetime, the structure of the beam dump was optimized. A number of bent sheets aligned parallel in the beam dump form a shape called a chevron which enables it to avoid the concentration of the incident laser pulse energy. The chevron beam dump is expected to withstand thermal loads due to nuclear heating, radiation from the plasma, and numerous incident laser pulses throughout the entire ITER project with a reasonable margin for the peak factor of the beam profile. Structural analysis was also carried out in case of electromagnetic loads during a disruption. Moreover, detailed issues for more accurate assessments of the beam dump's lifetime are clarified. Variation of the bi-directional reflection distribution function (BRDF) due to erosion by or contamination of neutral particles derived from the plasma is one of the most critical issues that needs to be resolved. In this paper, the BRDF was assumed, and the total amount of stray light and the absorbed laser energy profile on the beam dump were evaluated.
Iterative image-domain decomposition for dual-energy CT
Niu, Tianye; Dong, Xue; Petrongolo, Michael; Zhu, Lei, E-mail: leizhu@gatech.edu [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)] [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)
2014-04-15T23:59:59.000Z
Purpose: Dual energy CT (DECT) imaging plays an important role in advanced imaging applications due to its capability of material decomposition. Direct decomposition via matrix inversion suffers from significant degradation of image signal-to-noise ratios, which reduces clinical values of DECT. Existing denoising algorithms achieve suboptimal performance since they suppress image noise either before or after the decomposition and do not fully explore the noise statistical properties of the decomposition process. In this work, the authors propose an iterative image-domain decomposition method for noise suppression in DECT, using the full variance-covariance matrix of the decomposed images. Methods: The proposed algorithm is formulated in the form of least-square estimation with smoothness regularization. Based on the design principles of a best linear unbiased estimator, the authors include the inverse of the estimated variance-covariance matrix of the decomposed images as the penalty weight in the least-square term. The regularization term enforces the image smoothness by calculating the square sum of neighboring pixel value differences. To retain the boundary sharpness of the decomposed images, the authors detect the edges in the CT images before decomposition. These edge pixels have small weights in the calculation of the regularization term. Distinct from the existing denoising algorithms applied on the images before or after decomposition, the method has an iterative process for noise suppression, with decomposition performed in each iteration. The authors implement the proposed algorithm using a standard conjugate gradient algorithm. The method performance is evaluated using an evaluation phantom (Catphan©600) and an anthropomorphic head phantom. The results are compared with those generated using direct matrix inversion with no noise suppression, a denoising method applied on the decomposed images, and an existing algorithm with similar formulation as the proposed method but with an edge-preserving regularization term. Results: On the Catphan phantom, the method maintains the same spatial resolution on the decomposed images as that of the CT images before decomposition (8 pairs/cm) while significantly reducing their noise standard deviation. Compared to that obtained by the direct matrix inversion, the noise standard deviation in the images decomposed by the proposed algorithm is reduced by over 98%. Without considering the noise correlation properties in the formulation, the denoising scheme degrades the spatial resolution to 6 pairs/cm for the same level of noise suppression. Compared to the edge-preserving algorithm, the method achieves better low-contrast detectability. A quantitative study is performed on the contrast-rod slice of Catphan phantom. The proposed method achieves lower electron density measurement error as compared to that by the direct matrix inversion, and significantly reduces the error variation by over 97%. On the head phantom, the method reduces the noise standard deviation of decomposed images by over 97% without blurring the sinus structures. Conclusions: The authors propose an iterative image-domain decomposition method for DECT. The method combines noise suppression and material decomposition into an iterative process and achieves both goals simultaneously. By exploring the full variance-covariance properties of the decomposed images and utilizing the edge predetection, the proposed algorithm shows superior performance on noise suppression with high image spatial resolution and low-contrast detectability.
Two-pulse solutions in the fifth-order KdV equation : rigorous theory and numerical approximations
Marina Chugunova; Dmitry Pelinovsky
2006-05-23T23:59:59.000Z
We revisit existence and stability of two-pulse solutions in the fifth-order Korteweg--de Vries (KdV) equation with two new results. First, we modify the Petviashvili method of successive iterations for numerical (spectral) approximations of pulses and prove convergence of iterations in a neighborhood of two-pulse solutions. Second, we prove structural stability of embedded eigenvalues of negative Krein signature in a linearized KdV equation. Combined with stability analysis in Pontryagin spaces, this result completes the proof of spectral stability of the corresponding two-pulse solutions. Eigenvalues of the linearized problem are approximated numerically in exponentially weighted spaces where embedded eigenvalues are isolated from the continuous spectrum. Approximations of eigenvalues and full numerical simulations of the fifth-order KdV equation confirm stability of two-pulse solutions related to the minima of the effective interaction potential and instability of two-pulse solutions related to the maxima points.
Dougherty, John J. (Norristown, PA); Rudge, George T. (Lansdale, PA)
1980-01-01T23:59:59.000Z
An electric signal representative of the rate of insolation is integrated to determine if it is adequate for operation of a solar energy collection system.
Copper wafer bonding in three-dimensional integration
Chen, Kuan-Neng, 1974-
2005-01-01T23:59:59.000Z
Three-dimensional (3D) integration, in which multiple layers of devices are stacked with high density of interconnects between the layers, offers solutions for problems when the critical dimensions in integrated circuits ...
Case Study of an Innovative HVAC System with Integral Dehumidifier
Shirey, D. B.; Raustad, R. A.
2008-01-01T23:59:59.000Z
in unison when the need arises. The use of dehumidification equipment integrated with a conventional AC system provides a unique solution for moisture control applications. This paper describes the development and testing of this integrated equipment...
Prinsloo, R. H.; Tomasevic, D. I. [Necsa, PO Box 582, Pretoria, 0001 (South Africa)
2012-07-01T23:59:59.000Z
Transverse integrated nodal diffusion methods currently represent the standard in full core neutronic simulation. The primary shortcoming in this approach is the utilization of the quadratic transverse leakage approximation. This approach, although proven to work well for typical LWR problems, is not consistent with the formulation of nodal methods and can cause accuracy and convergence problems. In previous work, an improved, consistent quadratic leakage approximation was formulated, which derived from the class of higher order nodal methods developed some years ago. In this paper a number of iteration schemes are developed around this consistent quadratic leakage approximation which yield accurate node average results in much improved calculational times. The developed consistent leakage approximation is extended in this work via a number of numerical schemes, the most promising of which results from utilizing the consistent leakage approximation as a correction method to the standard quadratic leakage approximation. Numerical results are demonstrated on a set of benchmark problems, such as the 3D IAEA LWR and MOX C5 problems. (authors)
Wang, Ge
Dual-dictionary learning-based iterative image reconstruction for spectral computed tomography-based iterative image reconstruction for spectral computed tomography application Bo Zhao1 , Huanjun Ding1 , Yang discriminating photon-counting detectors, such as cadmiumzinctelluride (CZT), in spectral computed tomography
Contents of ITER deal revealed The Yomiuri Shimbun (May 27, 2005, 4 am)
in thermonuclear fusion. The country also will supply 20 percent of workers to ITER facilities. The four other on the roles of host and non-hosting countries involved in the International Thermonuclear Experimental Reactor. The planned ITER is an experimental facility for a thermonuclear reactor designed to produce power by fusing
Fourier-Based Forward and Back-Projectors for Iterative Image Reconstruction
Fessler, Jeffrey A.
Fourier-Based Forward and Back-Projectors for Iterative Image Reconstruction Samuel Matej, Jeffrey. Fourier-Based Projectors B. Non-Uniform Fast Fourier Transform C. Fourier-Based Iterative Reconstruction D. Fourier-based forward and back-projection methods have the potential to considerably reduce
Acceleration of the Jacobi iterative method by factors exceeding 100 using scheduled relaxation
Mittal, Rajat
Acceleration of the Jacobi iterative method by factors exceeding 100 using scheduled relaxation Abstract We present a methodology that accelerates the classical Jacobi iterative method by factors of the Jacobi method. Mathematical conditions that maximize the convergence rate are derived and optimal schemes
Current control in ITER steady state plasmas with neutral beam steering R. V. Budnya
Budny, Robert
. The heating and current drive systems for ITER plasmas are being designed. The primary systems being for ITER steady state plasmas are specified. Current drive by negative ion neutral beam injection, lower-hybrid as the ratio of the DT fusion and the external heating powers PDT/Pext 5 for durations of up to 3000 s
Ng, T. S. Eugene
An Optical Programmable Network Architecture Supporting Iterative Multicast for Data. Bergman1 1 Department of Electrical Engineering, Columbia University, 500 West 120th Street, New York, New.edu Abstract--We present an optical programmable network architecture to enable agile and efficient iterative
Visions for data management and remote collaboration for ITER M. Greenwald1
Greenwald, Martin
Visions for data management and remote collaboration for ITER M. Greenwald1 D. Schissel2 J. R Introduction This paper outlines a vision for data management and remote collaboration systems for ITER scales, leading to requirements for efficient browsing of very long data records and the ability
Brussels, 1 April 2006 ITER Project on Track Top Management Team
IP/06/418 Brussels, 1 April 2006 ITER Project on Track Top Management Team Identified Union, India, Japan, Korea, China, Russia and USA), identified the top management team that will manage-General in November 2005, the top management team of the prospective ITER Organization is now complete. The Tokyo
PARSMI, a parallel revised simplex algorithm incorporating minor iterations and Devex pricing
Hall, Julian
PARSMI, a parallel revised simplex algorithm incorporating minor iterations and Devex pricing J, a parallel revised simplex algorithm incorporating minor iterations and Devex pricing J. A. J. Hall and K. I linear programming problems using the re- vised simplex method, two common variants are the incorporation
TESTS OF 1-D TRANSPORT MODELS, AND THEIR PREDICTIONS FOR ITER
Vlad, Gregorio
. INTRODUCTION Predictions of ITER based on validated 1-D transport models would provide: 1) a physical research programs. Many transport models have been partially tested against tokamak data [1]. In order to establish how well each model represents the wide range of existing tokamak data we have developed the ITER
Lee, Jae Hong
Performance of Iterative Multiuser Detection with a Partial PIC Detector and Serially Concatenated-CDMA system. An iterative multiuser detection has a partial parallel interference cancellation (PIC) detector and serially concatenated codes. Taking the expectation value of a coded bit the partial PIC detector produces
CONCURRENT ENGINEERING: Research and Applications Overcoming the 90% Syndrome: Iteration Management
Ford, David N.
CONCURRENT ENGINEERING: Research and Applications Overcoming the 90% Syndrome: Iteration Management in Concurrent Development Projects David N. Ford1,* and John D. Sterman2 1 Department of Civil Engineering to unanticipated problems and perturbations. Key Words: concurrent development, concurrent engineering, iteration
ITER parties come to an agreement on the world's largest international scientific partnership
ITER parties come to an agreement on the world's largest international scientific partnership on the world's largest international scientific partnership ITER, a project to demonstrate the potential of fusion as an energy source, will be the world's biggest scientific collaboration of its kind and involve
The European Joint Undertaking for ITER and the Development of Fusion Energy
1 The European Joint Undertaking for ITER and the Development of Fusion Energy (Fusion for Energy Agreement · Last meeting of negotiators took place in Jeju, China in November 2005 · Meeting of legal experts in Barcelona last week resolved most remaining issues #12;3 Tentative ITER Timetable · Political
June 28, 2005 U.S.Statements on International Fusion Reactor (ITER)
to produce clean, safe, renewable, and commercially-available fusion energy by the middle of this century. Orbach, Director of the U.S. Department of Energy's Office of Science, announced the ITER international of the announcement by the six parties is available at www.iter.org Statement by U.S. Secretary of Energy Samuel W
Thirty states sign ITER nuclear fusion plant deal 1 hour, 28 minutes ago
Thirty states sign ITER nuclear fusion plant deal 1 hour, 28 minutes ago Representatives of more than 30 countries signed a deal on Tuesday to build the world's most advanced nuclear fusion reactor of the European Union, the United States, Japan, India, Russia, South Korea and China signed the ITER agreement
Decision on the choice of the site for ITER reactor LEMONDE.FR|20.12.03| 19h25
which will accomodate the future experimental reactor of nuclear fusion (ITER) was to be selected the choice of the site which will accomodate the future experimental reactor of nuclear fusion (ITER
Schaffer, Steven
ITERATIVE REPAIR PLANNING FOR SPACECRAFT OPERATIONS USING THE ASPEN SYSTEM Gregg Rabideau, Russell and Planning Environment (ASPEN). ASPEN encodes complex spacecraft knowledge of operability constraints, flight generation of low level spacecraft sequences. Using a technique called iterative repair, ASPEN classifies
Iterative methods for dose reduction and image enhancement in tomography
Miao, Jianwei; Fahimian, Benjamin Pooya
2012-09-18T23:59:59.000Z
A system and method for creating a three dimensional cross sectional image of an object by the reconstruction of its projections that have been iteratively refined through modification in object space and Fourier space is disclosed. The invention provides systems and methods for use with any tomographic imaging system that reconstructs an object from its projections. In one embodiment, the invention presents a method to eliminate interpolations present in conventional tomography. The method has been experimentally shown to provide higher resolution and improved image quality parameters over existing approaches. A primary benefit of the method is radiation dose reduction since the invention can produce an image of a desired quality with a fewer number projections than seen with conventional methods.
An iterative technique for the factorization of polynomials
Gray, Jerry Edwin
1964-01-01T23:59:59.000Z
01 0~09999999E 01 0%20000000E 01 0. 0 ' 19961047E Ol . 0 ~ 0. 20000111E Ol 0 Oe2000DODOE Ol 0 ~ 0 2000nnnnc ni 0 ' 10002293E Ol 0 99718089E 00 0~99999715E 00 0 ~ 10000060E 01 Oa99999998E 00 0~99999998E 00 0 ' 99999996E 00 Oa99999999E 00...+90000000E 01 0 ~ 0 36000000E 02 0 ~ 18000000E 02 0 yynnnnnnF 02 I TER P{ I i J) FOR THIS SET OF ITERATIONS Oa09999999E 0 09999999E 0 09999999E 0+ 11072740E 0 ' 09999999E 0 ' 58248933E 0 09999999E 0 ' 39608047E 0 ' 09999999E 0 40989567E Oa...
Simulations of Alpha Wall Load in ITER. Final report
Carlsson, Johan
2010-10-20T23:59:59.000Z
The partially DOE funded International Thermonuclear Experimental Reactor (ITER) will produce massive amounts of energetic charged alpha particles, which are imperfectly confined by a strong magnetic field. The wall of the experiment is designed to withstand an estimated wall load from these fusion alpha particles, but the accuracy of this estimate needs to be improved to avoid potentially catastrophic surprises when the experiment becomes operational. We have added a more accurate, gyro-dynamic model of particle motion to the existing drift-dynamic model in the DELTA5D simulation software used for the project. We have also added the ability to load a detailed engineering model of the wall and use it in the simulations.
Iterative methods for solving the pressure problem at multiphase filtration
Vabishchevich, P
2011-01-01T23:59:59.000Z
Applied problems of oil and gas recovery are studied numerically using the mathematical models of multiphase fluid flows in porous media. The basic model includes the continuity equations and the Darcy laws for each phase, as well as the algebraic expression for the sum of saturations. Primary computational algorithms are implemented for such problems using the pressure equation. In this paper, we highlight the basic properties of the pressure problem and discuss the necessity of their fulfillment at the discrete level. The resulting elliptic problem for the pressure equation is characterized by a non-selfadjoint operator. Possibilities of approximate solving the elliptic problem are considered using the iterative methods. Special attention is given to the numerical algorithms for calculating the pressure on parallel computers.
Development of the bus joint for the ITER Central Solenoid
Martovetsky, Nicolai N [ORNL] [ORNL; Irick, David Kim [ORNL] [ORNL; Kenney, Steven J [ORNL] [ORNL
2013-01-01T23:59:59.000Z
The terminations of the Central Solenoid (CS) modules are connected to the bus extensions by joints located outside the CS in the gap between the CS and Torodial Field (TF) assemblies. These joints have very strict space limitations. Low resistance is a common requirement for all ITER joints. In addition, the CS bus joints will experience and must be designed to withstand significant variation in the magnetic field of several tenths of a Tesla per second during initiation of plasma. The joint resistance is specified to be less than 4 nOhm. The joints also have to be soldered in the field and designed with the possibility to be installed and dismantled in order to allow cold testing in the cold test facility. We have developed coaxial joints that meet these requirements and have demonstrated the feasibility to fabricate and assemble them in the vertical configuration. We introduced a coupling cylinder with superconducting strands soldered to the surface of the cable that can be installed in the ITER assembly hall and at the Cold Test Facility. This cylinder serves as a transition area between the CS module and the bus extension. We made two racetrack samples and tested four bus joints in our Joint Test Apparatus. Resistance of the bus joints was measured by a decay method and by a microvoltmeter; the value of the current was measured by the Hall probes. This measurement method was verified in the previous tests. The resistance of the joints varied insignificantly from 1.5 to 2 nOhm. One of the challenges associated with a soldered joint is the inability to use corrosive chemicals that are difficult to clean. This paper describes our development work on cable preparation, chrome removal, compaction, soldering, and final assembly and presents the test results.
Integrated Brush Management Systems for Texas
Hanselka, C. Wayne; Hamilton, Wayne T.; Rector, Barron S.
2001-01-04T23:59:59.000Z
Integrated Brush Management Systems (IBMS) involve careful analysis of range resources and ranch goals in order to develop solutions to brush problems. Successful use of IBMS should result in improved management processes and greater profitability...
Nebraska Statewide Wind Integration Study: Executive Summary
EnerNex Corporation, Knoxville, Tennessee; Ventyx, Atlanta, Georgia; Nebraska Power Association, Lincoln, Nebraska
2010-03-01T23:59:59.000Z
Wind generation resources in Nebraska will play an increasingly important role in the environmental and energy security solutions for the state and the nation. In this context, the Nebraska Power Association conducted a state-wide wind integration study.
Coupling between JET Pedestal ne-Te and Outer Target Plate Recycling: Consequences for JET ITER-Like-Wall Operation
Evolution of Plasma Parameters in the Termination Phase of High Confinement H-modes at JET and Implications for ITER
Simulation of MGI Efficiency for Plasma Energy Conversion into Ar Radiation in JET and Implications for ITER
Modelling of Melt Damage of Tungsten Armour under Multiple Transients Expected in ITER and Validations Against JET-ILW Experiments
Integrated structural health monitoring.
Farrar, C. R. (Charles R.)
2001-01-01T23:59:59.000Z
Structural health monitoring is the implementation of a damage detection strategy for aerospace, civil and mechanical engineering infrastructure. Typical damage experienced by this infrastructure might be the development of fatigue cracks, degradation of structural connections, or bearing wear in rotating machinery. The goal of the research effort reported herein is to develop a robust and cost-effective structural health monitoring solution by integrating and extending technologies from various engineering and information technology disciplines. It is the authors opinion that all structural health monitoring systems must be application specific. Therefore, a specific application, monitoring welded moment resisting steel frame connections in structures subjected to seismic excitation, is described along with the motivation for choosing this application. The structural health monitoring solution for this application will integrate structural dynamics, wireless data acquisition, local actuation, micro-electromechanical systems (MEMS) technology, and statistical pattern recognition algorithms. The proposed system is based on an assessment of the deficiencies associated with many current structural health monitoring technologies including past efforts by the authors. This paper provides an example of the integrated approach to structural health monitoring being undertaken at Los Alamos National Laboratory and summarizes progress to date on various aspects of the technology development.
and projects, in international cooperation efforts in new energy development and global climate change research of ITER project, to scientists, experts and engineers who have made hard efforts in ITER research priorities. Arrangements for China joining ITER #12;Project and conducting nuclear fusion research activities
-2035 : The Fusion Energy Era of magnetic fusion research ITER thermonuclear plasmasITER thermonuclear plasmasThe ITERThe ITER eraera : the 10: the 10 yearyear roadmaproadmap for the French fusion programmefor the French fusion programme E. Tsitrone1 on behalf of IRFM and Tore Supra team 1 : CEA, IRFM, F-13108 Saint
Exhibit 1B Patent Rights Acquisition by the Government ITER UT-B Contracts Div Page 1 of 6
Pennycook, Steve
Exhibit 1B Patent Rights Acquisition by the Government ITER UT-B Contracts Div March 2007 Page 1 of 6 ex1b-ITER-mar07.doc Exhibit 1B ITER Ref: DEAR 952.227-13 PATENT RIGHTS - ACQUISITION or discovery which is or may be patentable or otherwise protectable under title 35 of the United States Code
Abdou, Mohamed
2007-01-01T23:59:59.000Z
Fusion Engineering and Design 82 (2007) 22172225 Integrated thermo-fluid analysis towards helium Engineering and Design 82 (2007) 22172225 This calls in for an extensive analysis of the various proposed flow path design for an ITER solid breeder blanket module A. Yinga,, M. Narulaa, R. Hunta, M. Abdoua, Y
Path Integration on Darboux Spaces
Christian Grosche
2005-07-20T23:59:59.000Z
In this paper the Feynman path integral technique is applied to two-dimensional spaces of non-constant curvature: these spaces are called Darboux spaces $\\DI$--$\\DIV$. We start each consideration in terms of the metric and then analyze the quantum theory in the separable coordinate systems. The path integral in each case is formulated and then solved in the majority of cases, the exceptions being quartic oscillators where no closed solution is known. The required ingredients are the path integral solutions of the linear potential, the harmonic oscillator, the radial harmonic oscillator, the modified P\\"oschl--Teller potential, and for spheroidal wave-functions, respectively. The basic path integral solutions, which appear here in a complicated way, have been developed in recent work and are known. The final solutions are represented in terms of the corresponding Green's functions and the expansions into the wave-functions, respectively. We also sketch some limiting cases of the Darboux spaces, where spaces of constant negative and zero curvature emerge.
ContentsContents1133integration integration
Vickers, James
ContentsContents1133integration integration 1. Basic concepts of integration 2. Definite integrals 3. The area bounded by a curve 4. Integration by parts 5. Integration by substitution and using partial fractions 6. Integration of trigonometric functions Learning outcomes In this workbook you
Pellet fueling technology development leading to efficient fueling of ITER burning plasmas
Baylor, L.R.; Combs, S.K.; Jernigan, T.C.; Houlberg, W.A.; Owen, L.W.; Rasmussen, D.A.; Maruyama, S.; Parks, P.B. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6169 (United States)
2005-05-15T23:59:59.000Z
Pellet injection is the primary fueling technique planned for core fueling of ITER [ITER Technical Basis 2002 ITER EDA Documentation Series (Vienna: IAEA)] burning plasmas. Efficient core plasma fueling with deuterium and tritium D-T is a requirement for achieving high fusion gain and it cannot be achieved with gas fueling. Injection of pellets from the inner wall has been shown on present day tokamaks to provide efficient fueling and is planned for use on ITER. Modeling of the fueling deposition from inner wall pellet injection using the Parks ExB drift model indicates that pellets have the capability to fuel well inside the separatrix. Gas fueling calculations show very poor neutral penetration due to the high density and wide scrape off layer. Isotopically mixed D-T pellets can provide efficient tritium fueling that will minimize tritium wall loading when compared to gas puffing. Currently the performance of the ITER inner wall guide tube design is under test with initial results indicating that pellet speeds in excess of 300 m/s will lead to fragmented pellets. The ITER pellet injection technology requirements and remaining development issues are discussed along with a plan to reach the design goal for employment on ITER.
Integrability Singular reduction
Patrick, George
Motivation Integrability Singular reduction Integration of Singular quotients Summary References Singular reduction of Poisson manifolds and integrability Rui L. Fernandes1 Joint work with J.P. Ortega Fernandes Singular reduction and integrability #12;Motivation Integrability Singular reduction Integration
Formation and Sustainment of ITPs in ITER with the Baseline Heating Mix
Francesca M. Poli and Charles Kessel
2012-12-03T23:59:59.000Z
Plasmas with internal transport barriers (ITBs) are a potential and attractive route to steady-state operation in ITER. These plasmas exhibit radially localized regions of improved con nement with steep pressure gradients in the plasma core, which drive large bootstrap current and generate hollow current pro les and negative shear. This work examines the formation and sustainment of ITBs in ITER with electron cyclotron heating and current drive. It is shown that, with a trade-o of the power delivered to the equatorial and to the upper launcher, the sustainment of steady-state ITBs can be demonstrated in ITER with the baseline heating con guration.
Research Article Using Ontologies for Integrated
Camara, Gilberto
Research Article Using Ontologies for Integrated Geographic Information Systems Frederico T Fonseca. The proposed solution is an ontology-driven geographic information system that acts as a system integrator of the system. Special emphasis is given to the case of remote sensing systems and geographic information
An adaptive iterative method for solving stochastic PDEs
Hackbusch, Wolfgang
and memory compared to many state-of-the-art stochastic intrusive and non-intrusive methods. 1 #12; A new intrusive approach for constructing low-rank solutions to stochastic partial dif- ferential
Enabling rapid iterative model design within the laboratory environment
Clayton, Thomas F.
2009-01-01T23:59:59.000Z
This thesis presents a proof of concept study for the better integration of the electrophysiological and modelling aspects of neuroscience. Members of these two sub-disciplines collaborate regularly, but due to differing ...
Certifying Solutions to Permutation Group Problems
Sorge, Volker
the integration of permutation group algorithms with proof planning. We consider eight basic questions arising planning. We consider eight basic questions arising in computational permutation group theory, for whichCertifying Solutions to Permutation Group Problems Arjeh Cohen 1 , Scott H. Murray 1#3; , Martin
Certifying Solutions to Permutation Group Problems
Murray, Scott H.
of permutation group algorithms with proof planning. We consider eight basic questions arising in com- putational the integration of permutation group algorithms from computer algebra with proof planning. We consider eight basicCertifying Solutions to Permutation Group Problems Arjeh Cohen1 , Scott H. Murray1, , Martin Pollet
Status of the Design of the ITER ECE Diagnostic
Taylor, Gary [PPPL
2014-04-01T23:59:59.000Z
The baseline design for the ITER electron cyclotron emission (ECE) diagnostic has entered the detailed preliminary design phase. Two plasma views are planned, a radial view and an oblique view that is sensitive to distortions in the electron momentum distribution near the average thermal momentum. Both views provide high spatial resolution electron temperature profiles when the momentum distribution remains Maxwellian. The ECE diagnostic system consists of the front-end optics, including two 1000 K calibration sources, in equatorial port plug EP9, the 70-1000 GHz transmission system from the front-end to the diagnostics hall, and the ECE instrumentation in the diagnostics hall. The baseline ECE instrumentation will include two Michelson interferometers that can simultaneously measure ordinary and extraordinary mode ECE from 70 to 1000 GHz, and two heterodyne radiometer systems, covering 122-230 GHz and 244-355 GHz. Significant design challenges include 1) developing highly-reliable 1000 K calibration sources and the associated shutters/mirrors, 2) providing compliant couplings between the front-end optics and the polarization splitter box that accommodate displacements of the vacuum vessel during plasma operations and bake out, 3) protecting components from damage due to stray ECH radiation and other intense millimeter wave emission and 4) providing the low-loss broadband transmission system.
The A_infty de Rham theorem and integration of representations up to homotopy
Abad, Camilo Arias
2010-01-01T23:59:59.000Z
We use Chen's iterated integrals to integrate representations up to homotopy. That is, we construct an A_infty functor from the representations up to homotopy of a Lie algebroid to those of its infinity groupoid. This construction extends the usual integration of representations in Lie theory. We discuss several examples including Lie algebras and Poisson manifolds. The construction is based on an A_infty version of de Rham's theorem due to Gugenheim. The integration procedure we explain here amounts to extending the construction of parallel transport for superconnections, introduced by Igusa and Block-Smith, to the case of certain differential graded manifolds.
Performance of Closed Form and Iterative MU-MIMO Precoders for Different Broadcast
Gesbert, David
in improving both reliability and capacity of the system. Some theoretical analysis of the capacity, and Hassibi) algorithm proposed in [12] as it is an iterative algorithm for MU-MISO sumrate maximization based
Greenberg, Albert
Iterative Multivariate Regression Model for Correlated Responses Prediction S. Tom Au, Guangqin Ma- tive procedure to model multiple responses prediction into correlated multivariate predicting scheme, which is always favorable for responses separations in our multivariate prediction. We also point out
ITER-like wall sliced beryllium tiles The JET Enhanced Performance 2 (EP2) shutdown
ITER-like wall sliced beryllium tiles Background The JET Enhanced Performance 2 (EP2) shutdown comprises beryllium, tungsten and coated CFC tiles mounted on inconel carriers. A simulation of the wall
ITERATIVE NEAR-FIELD (INF) PRECONDITIONER FOR THE MULTILEVEL FAST MULTIPOLE ALGORITHM
Gürel, Levent
ITERATIVE NEAR-FIELD (INF) PRECONDITIONER FOR THE MULTILEVEL FAST MULTIPOLE ALGORITHM LEVENT G in computa- tional electromagnetics using the multilevel fast multipole algorithm (MLFMA), preconditioners multipole method (FMM), multilevel fast multipole algorithm (MLFMA), sparse approximate inverse
Print this article Close This Window EU OKs India joining ITER nuclear reactor project
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Tamma, Raja Venkatesh
2004-09-30T23:59:59.000Z
We study and analyze the performance of iterative equalization and decoding (IED) using an M-BCJR equalizer. We use bit error rate (BER), frame error rate simulations and extrinsic information transfer (EXIT) charts to study and compare...
US ITER is a strong contributor in plan to enhance international...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Johnson developed key features for a modular approach to housing the extensive diagnostic systems that will be installed on the ITER tokamak. (Photo by Elle StarkmanPPPL Office of...
Iterative receivers for OFDM systems with dispersive fading and frequency offset
Liu, Hui
2004-09-30T23:59:59.000Z
The presence of dispersive fading and inter-carrier interference (ICI) constitute the major impediment to reliable communications in orthogonal frequency-division multiplexing (OFDM) systems. Recently iterative (``Turbo'') processing techniques...
Raffray, A. René
24th IAEA Fusion Energy Conference, San Diego, CA, October 8-13, 2012 Slide 1 The ITER BlanketSNL , US ITER Domestic Agency; 7F4E, EU ITER Domestic Agency 24th IAEA Fusion Energy Conference IAEA reflect those of the ITER Organization #12;24th IAEA Fusion Energy Conference, San Diego, CA, October 8
Qualification of the US made conductors for ITER TF magnet system
Martovetsky, N; Hatfield, D; Miller, J; Bruzzone, P; Stepanov, B; Seber, B
2009-10-08T23:59:59.000Z
The US Domestic Agency (USDA) is one of the six suppliers of the TF conductor for ITER. In order to qualify conductors according to ITER requirements we prepared several lengths of the CICC and short samples for testing in the SULTAN facility in CRPP, Switzerland. We also fully characterized the strands that were used in these SULTAN samples. Fabrication experience and test results are presented and discussed.
Smart Grid Integration Laboratory
Wade Troxell
2011-09-30T23:59:59.000Z
The initial federal funding for the Colorado State University Smart Grid Integration Laboratory is through a Congressionally Directed Project (CDP), DE-OE0000070 Smart Grid Integration Laboratory. The original program requested in three one-year increments for staff acquisition, curriculum development, and instrumentation â?? all which will benefit the Laboratory. This report focuses on the initial phase of staff acquisition which was directed and administered by DOE NETL/ West Virginia under Project Officer Tom George. Using this CDP funding, we have developed the leadership and intellectual capacity for the SGIC. This was accomplished by investing (hiring) a core team of Smart Grid Systems engineering faculty focused on education, research, and innovation of a secure and smart grid infrastructure. The Smart Grid Integration Laboratory will be housed with the separately funded Integrid Laboratory as part of CSUâ??s overall Smart Grid Integration Center (SGIC). The period of performance of this grant was 10/1/2009 to 9/30/2011 which included one no cost extension due to time delays in faculty hiring. The Smart Grid Integration Laboratoryâ??s focus is to build foundations to help graduate and undergraduates acquire systems engineering knowledge; conduct innovative research; and team externally with grid smart organizations. Using the results of the separately funded Smart Grid Workforce Education Workshop (May 2009) sponsored by the City of Fort Collins, Northern Colorado Clean Energy Cluster, Colorado State University Continuing Education, Spirae, and Siemens has been used to guide the hiring of faculty, program curriculum and education plan. This project develops faculty leaders with the intellectual capacity to inspire its students to become leaders that substantially contribute to the development and maintenance of Smart Grid infrastructure through topics such as: (1) Distributed energy systems modeling and control; (2) Energy and power conversion; (3) Simulation of electrical power distribution system that integrates significant quantities of renewable and distributed energy resources; (4) System dynamic modeling that considers end-user behavior, economics, security and regulatory frameworks; (5) Best practices for energy management IT control solutions for effective distributed energy integration (including security with the underlying physical power systems); (6) Experimental verification of effects of various arrangements of renewable generation, distributed generation and user load types along with conventional generation and transmission. Understanding the core technologies for enabling them to be used in an integrated fashion within a distribution network remains is a benefit to the future energy paradigm and future and present energy engineers.
Bhuyan, Laxmi N.
4 Solutions Solution 4.1 4.1.1 The values of the signals are as follows: RegWrite MemRead ALUMux MemWrite ALUOp RegMux Branch a. 1 0 0 (Reg) 0 Add 1 (ALU) 0 b. 1 1 1 (Imm) 0 Add 1 (Mem) 0 ALUMux of the ALU and 1 (Mem) selects the output of memory. A value of X is a "don't care" (does not matter
Exact solutions of Deformed Schrodinger Equation with a class of non central physical potentials
M. Chabab; A. El Batoul; M. Oulne
2015-06-20T23:59:59.000Z
In this paper we present exact solutions of Schrodinger equation (SE) for a class of non central physical potentials within the formalism of position-dependent effective mass. The energy eigenvalues and eigenfunctions of the bound-states for the Schrodinger equation are obtained analytically by means of asymptotic iteration method (AIM) and easily calculated through a new generalized decomposition of the effective potential allowing easy separation of the coordinates. Our results are in excellent agreement with other works in the literature.
The electromagnetic spike solutions
Ernesto Nungesser; Woei Chet Lim
2013-09-28T23:59:59.000Z
The aim of this paper is to use the existing relation between polarized electromagnetic Gowdy spacetimes and vacuum Gowdy spacetimes to find explicit solutions for electromagnetic spikes by a procedure which has been developed by one of the authors for gravitational spikes. We present new inhomogeneous solutions which we call the EME and MEM electromagnetic spike solutions.
Design of fast tuning elements for the ITER ICH system
Swain, D.W.; Goulding, R.H.
1996-05-01T23:59:59.000Z
The coupling between the ion cyclotron (IC) antenna and the ITER plasma (as expressed by the load resistance the antenna sees) will experience relatively fast variations due to plasma edge profile modifications. If uncompensated, these will cause an increase in the amount of power reflected back to the transmitter and ultimately a decrease in the amount of radio frequency (rf) power to the plasma caused by protective suppression of the amount of rf power generated by the transmitter. The goals of this task were to study several alternate designs for a tuning and matching (T&M) system and to recommend some research and development (R&D) tasks that could be carried out to test some of the most promising concepts. Analyses of five different T&M configurations are presented in this report. They each have different advantages and disadvantages, and the choice among them must be made depending on the requirements for the IC system. Several general conclusions emerge from our study: The use of a hybrid splitter as a passive reflected-power dump [``edge localized mode (ELM)-dump``] appears very promising; this configuration will protect the rf power sources from reflected power during changes in plasma loading due to plasma motion or profile changes (e.g., ELM- induced changes in the plasma scrape-off region) and requires no active control of the rf system. Trade-offs between simplicity of design and capability of the system must be made. Simple system designs with few components near the antenna either have high voltages over considerable distances of transmission lines, or they are not easily tuned to operate at different frequencies. Designs using frequency shifts and/or fast tuning elements can provide fast matching over a wide range of plasma loading; however, the designs studied here require components near the antenna, complicating assembly and maintenance. Capacitor-tuned resonant systems may offer a good compromise.
The IBM Government Industry Framework: Accelerating solutions for smarter governments
ISVs and IBM solutions that are built on industry standards and pre-integrated into the frameworkThe IBM Government Industry Framework: Accelerating solutions for smarter governments IBM operating. No wonder they perceive a growing gap between concept and realization. #12;3 IBM Industry
Integrable cases of gravitating static isothermal fluid spheres
B. V. Ivanov
2001-07-17T23:59:59.000Z
It is shown that different approaches towards the solution of the Einstein equations for a static spherically symmetric perfect fluid with a gamma-law equation of state lead to an Abel differential equation of the second kind. Its only integrable cases at present are flat spacetime, de Sitter solution and its Buchdahl transform, Einstein static universe and the Klein-Tolman solution.
Pellet Fueling Technology Development Leading to Efficient Fueling of ITER Burning Plasmas
Baylor, Larry R [ORNL; Combs, Stephen Kirk [ORNL; Jernigan, Thomas C [ORNL; Houlberg, Wayne A [ORNL; Maruyama, S. [ITER International Team, Garching, Germany; Owen, Larry W [ORNL; Parks, P. B. [General Atomics; Rasmussen, David A [ORNL
2005-01-01T23:59:59.000Z
Pellet injection is the primary fueling technique planned for central fueling of the ITER burning plasma, which is a requirement for achieving high fusion gain. Injection of pellets from the inner wall has been shown on present day tokamaks to provide efficient fueling and is planned for use on ITER [1,2]. Significant development of pellet fueling technology has occurred as a result of the ITER R&D process. Extrusion rates with batch extruders have reached more than 1/2 of the ITER design specification of 1.3 cm3/s [3] and the ability to fuel efficiently from the inner wall by injecting through curved guide tubes has been demonstrated on several fusion devices. Modeling of the fueling deposition from inner wall pellet injection has been done using the Parks et al. ExB drift model [4] shows that inside launched pellets of 3mm size and speeds of 300 m/s have the capability to fuel well inside the separatrix. Gas fueling on the other hand is calculated to have very poor fueling efficiency due to the high density and wide scrape off layer compared to current machines. Isotopically mixed D/T pellets can provide efficient tritium fueling that will minimize tritium wall loading when compared to gas puffing of tritium. In addition, the use of pellets as an ELM trigger has been demonstrated and continues to be investigated as an ELM mitigation technique. During the ITER CDA and EDA the U.S. was responsible for ITER fueling system design and R&D and is in good position to resume this role for the ITER pellet fueling system. Currently the performance of the ITER guide tube design is under investigation. A mockup is being built that will allow tests with different pellet sizes and repetition rates. The results of these tests and their implication for fueling efficiency and central fueling will be discussed. The ITER pellet injection technology developments to date, specified requirements, and remaining development issues will be presented along with a plan to reach the design goal in time for employment on ITER.
Volumetric quantification of lung nodules in CT with iterative reconstruction (ASiR and MBIR)
Chen, Baiyu [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 and Carl E. Ravin Advanced Imaging Laboratories, Duke University, Durham, North Carolina 27705 (United States)] [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 and Carl E. Ravin Advanced Imaging Laboratories, Duke University, Durham, North Carolina 27705 (United States); Barnhart, Huiman [Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina 27705 (United States)] [Department of Biostatistics and Bioinformatics, Duke University, Durham, North Carolina 27705 (United States); Richard, Samuel [Carl E. Ravin Advanced Imaging Laboratories, Duke University, Durham, North Carolina 27705 and Department of Radiology, Duke University, Durham, North Carolina 27705 (United States)] [Carl E. Ravin Advanced Imaging Laboratories, Duke University, Durham, North Carolina 27705 and Department of Radiology, Duke University, Durham, North Carolina 27705 (United States); Robins, Marthony [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 (United States)] [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 (United States); Colsher, James [Department of Radiology, Duke University, Durham, North Carolina 27705 (United States)] [Department of Radiology, Duke University, Durham, North Carolina 27705 (United States); Samei, Ehsan [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 (United States) [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27705 (United States); Carl E. Ravin Advanced Imaging Laboratories, Duke University, Durham, North Carolina 27705 (United States); Department of Radiology, Duke University, Durham, North Carolina 27705 (United States); Department of Physics, Department of Biomedical Engineering, and Department of Electronic and Computer Engineering, Duke University, Durham, North Carolina 27705 (United States)
2013-11-15T23:59:59.000Z
Purpose: Volume quantifications of lung nodules with multidetector computed tomography (CT) images provide useful information for monitoring nodule developments. The accuracy and precision of the volume quantification, however, can be impacted by imaging and reconstruction parameters. This study aimed to investigate the impact of iterative reconstruction algorithms on the accuracy and precision of volume quantification with dose and slice thickness as additional variables.Methods: Repeated CT images were acquired from an anthropomorphic chest phantom with synthetic nodules (9.5 and 4.8 mm) at six dose levels, and reconstructed with three reconstruction algorithms [filtered backprojection (FBP), adaptive statistical iterative reconstruction (ASiR), and model based iterative reconstruction (MBIR)] into three slice thicknesses. The nodule volumes were measured with two clinical software (A: Lung VCAR, B: iNtuition), and analyzed for accuracy and precision.Results: Precision was found to be generally comparable between FBP and iterative reconstruction with no statistically significant difference noted for different dose levels, slice thickness, and segmentation software. Accuracy was found to be more variable. For large nodules, the accuracy was significantly different between ASiR and FBP for all slice thicknesses with both software, and significantly different between MBIR and FBP for 0.625 mm slice thickness with Software A and for all slice thicknesses with Software B. For small nodules, the accuracy was more similar between FBP and iterative reconstruction, with the exception of ASIR vs FBP at 1.25 mm with Software A and MBIR vs FBP at 0.625 mm with Software A.Conclusions: The systematic difference between the accuracy of FBP and iterative reconstructions highlights the importance of extending current segmentation software to accommodate the image characteristics of iterative reconstructions. In addition, a calibration process may help reduce the dependency of accuracy on reconstruction algorithms, such that volumes quantified from scans of different reconstruction algorithms can be compared. The little difference found between the precision of FBP and iterative reconstructions could be a result of both iterative reconstruction's diminished noise reduction at the edge of the nodules as well as the loss of resolution at high noise levels with iterative reconstruction. The findings do not rule out potential advantage of IR that might be evident in a study that uses a larger number of nodules or repeated scans.
th November 2005) High level negotiators from China, European Union, Japan, the Republic of Korea is currently Ambassador of Japan to Croatia, is a graduate Nuclear Engineer and has extensive experience ITER Agreement and completion of the Negotiations. Conclusion With the progress made in the Parties
Error Bounds from Extra Precise Iterative Refinement James Demmel
Li, Xiaoye Sherry
now prevented its adoption in standard subroutine libraries like LAPACK: (1) There was no standard way a reliable error bound for the computed solution. The completion of the new BLAS Technical Forum Standard [5 Cooperative Agreement No. ACI-9619020; NSF Grant Nos. ACI-9813362 and CCF-0444486; the DOE Grant Nos. DE-FG03
Integrative Bioengineering Institute
Eddington, David; Magin,L,Richard; Hetling, John; Cho, Michael
2009-01-09T23:59:59.000Z
Microfabrication enables many exciting experimental possibilities for medicine and biology that are not attainable through traditional methods. However, in order for microfabricated devices to have an impact they must not only provide a robust solution to a current unmet need, but also be simple enough to seamlessly integrate into standard protocols. Broad dissemination of bioMEMS has been stymied by the common aim of replacing established and well accepted protocols with equally or more complex devices, methods, or materials. The marriage of a complex, difficult to fabricate bioMEMS device with a highly variable biological system is rarely successful. Instead, the design philosophy of my lab aims to leverage a beneficial microscale phenomena (e.g. fast diffusion at the microscale) within a bioMEMS device and adapt to established methods (e.g. multiwell plate cell culture) and demonstrate a new paradigm for the field (adapt instead of replace). In order for the field of bioMEMS to mature beyond novel proof-of-concept demonstrations, researchers must focus on developing systems leveraging these phenomena and integrating into standard labs, which have largely been ignored. Towards this aim, the Integrative Bioengineering Institute has been established.
Modal Analysis of Homogeneous Optical Waveguides by Boundary Integral Method
Modal Analysis of Homogeneous Optical Waveguides by Boundary Integral Method Lei Wang J. Allen Cox of the waveguide. Two dierent systems of boundary integral equations are derived for the numerical solutions of the discrete propagation constants; one of them is in the form of Fredholm integral equations of the second
Computation of Contour Integrals on ${\\cal M}_{0,n}$
Cachazo, Freddy
2015-01-01T23:59:59.000Z
Contour integrals of rational functions over ${\\cal M}_{0,n}$, the moduli space of $n$-punctured spheres, have recently appeared at the core of the tree-level S-matrix of massless particles in arbitrary dimensions. The contour is determined by the critical points of a certain Morse function on ${\\cal M}_{0,n}$. The integrand is a general rational function of the puncture locations with poles of arbitrary order as two punctures coincide. In this note we provide an algorithm for the analytic computation of any such integral. The algorithm uses three ingredients: an operation we call general KLT, Petersen's theorem applied to the existence of a 2-factor in any 4-regular graph and Hamiltonian decompositions of certain 4-regular graphs. The procedure is iterative and reduces the computation of a general integral to that of simple building blocks. These are integrals which compute double-color-ordered partial amplitudes in a bi-adjoint cubic scalar theory.
Perry, Richard Allan
1970-01-01T23:59:59.000Z
Scientific Re t. MW-64, McGill University, Montreal, Canada, 65 pp. 20 APPEIIDIX IMPLICIT REAL sB (4 H ~ 0 Zl RE4LSB Lttl ~ Ny IR t I I ~ I C v KX ~ LZ ~ LT DIMFNS ION IC(401 PC(40), BIN(40) 1(31 ~ DES(3) F 81(3) t82(3) tE(3) ~ DPS(3 TB = 3 ~ 010... ) Ts = TQ(K) - 273. 0 Es(KI = 6. 11 s ( 10. 0ss( 7. SsTS / ( DES(K) = Es(KI S ( 7. 5SG/((Tst237 1(. 43429) Bl(KI = L / ( RV s TQ(KI ) BZ&KI = L / ( CP sTQ(KI ) E(KI = DEXP( 81(K) s rf'L&KI ) ? ( DPS(KI = -PQ 4 ( PIN(K)SS2. 5) S 3 AP(KI = -C...
Influence of solute-solute interactions on membrane filtration
Neale, Peta Anne
2009-01-01T23:59:59.000Z
An understanding of solute-solute interactions is essential for aquatic systems as this can affect the fate and behaviour of micropollutants in the environment and engineered systems. Despite the importance of solute-solute ...
Analytical solutions to matrix diffusion problems
Kekäläinen, Pekka, E-mail: pekka.kekalainen@helsinki.fi [Laboratory of Radiochemistry, Department of Chemistry, P.O. Box 55, FIN-00014 University of Helsinki (Finland)
2014-10-06T23:59:59.000Z
We report an analytical method to solve in a few cases of practical interest the equations which have traditionally been proposed for the matrix diffusion problem. In matrix diffusion, elements dissolved in ground water can penetrate the porous rock surronuding the advective flow paths. In the context of radioactive waste repositories this phenomenon provides a mechanism by which the area of rock surface in contact with advecting elements is greatly enhanced, and can thus be an important delay mechanism. The cases solved are relevant for laboratory as well for in situ experiments. Solutions are given as integral representations well suited for easy numerical solution.
Roussillon, Yann; Scholz, Jeremy H; Shelton, Addison; Green, Geoff T; Utthachoo, Piyaphant
2014-01-21T23:59:59.000Z
Methods and devices are provided for improved deposition systems. In one embodiment of the present invention, a deposition system is provided for use with a solution and a substrate. The system comprises of a solution deposition apparatus; at least one heating chamber, at least one assembly for holding a solution over the substrate; and a substrate curling apparatus for curling at least one edge of the substrate to define a zone capable of containing a volume of the solution over the substrate. In another embodiment of the present invention, a deposition system for use with a substrate, the system comprising a solution deposition apparatus; at heating chamber; and at least assembly for holding solution over the substrate to allow for a depth of at least about 0.5 microns to 10 mm.
Heating and current drive requirements towards steady state operation in ITER
Poli, F. M.; Kessel, C. E.; Gorelenkova, M. [Princeton Plasma Physics Laboratory, Princeton, NJ 08543 (United States); Bonoli, P. T. [MIT Plasma Science and Fusion Center, Cambridge, MA 02139 (United States); Batchelor, D. B. [Oak Ridge National Laboratory, Oak Ridge, TN 37831-6169 (United States); Harvey, B.; Petrov, Y. [CompX, Box 2672, Del Mar, CA 92014 (United States)
2014-02-12T23:59:59.000Z
Steady state scenarios envisaged for ITER aim at optimizing the bootstrap current, while maintaining sufficient confinement and stability to provide the necessary fusion yield. Non-inductive scenarios will need to operate with Internal Transport Barriers (ITBs) in order to reach adequate fusion gain at typical currents of 9 MA. However, the large pressure gradients associated with ITBs in regions of weak or negative magnetic shear can be conducive to ideal MHD instabilities, reducing the no-wall limit. The E × B flow shear from toroidal plasma rotation is expected to be low in ITER, with a major role in the ITB dynamics being played by magnetic geometry. Combinations of H/CD sources that maintain weakly reversed magnetic shear profiles throughout the discharge are the focus of this work. Time-dependent transport simulations indicate that, with a trade-off of the EC equatorial and upper launcher, the formation and sustainment of quasi-steady state ITBs could be demonstrated in ITER with the baseline heating configuration. However, with proper constraints from peeling-ballooning theory on the pedestal width and height, the fusion gain and the maximum non-inductive current are below the ITER target. Upgrades of the heating and current drive system in ITER, like the use of Lower Hybrid current drive, could overcome these limitations, sustaining higher non-inductive current and confinement, more expanded ITBs which are ideal MHD stable.
jeffb_000
2013-12-02T23:59:59.000Z
Nov 19, 2013 ... Calculate the total transaction costs incurred by Patrick and Eric combined. Solution: Ask Price = 30. Bid Ask Spread = 0.50 = Ask Price - Bid ...
Magno, Scott (Dublin, CA); Wang, Ruiping (Fremont, CA); Derouane, Eric (Liverpool, GB)
2003-01-01T23:59:59.000Z
The present invention is a mixed oxide solid solution containing a tetravalent and a pentavalent cation that can be used as a support for a metal combustion catalyst. The invention is furthermore a combustion catalyst containing the mixed oxide solid solution and a method of making the mixed oxide solid solution. The tetravalent cation is zirconium(+4), hafnium(+4) or thorium(+4). In one embodiment, the pentavalent cation is tantalum(+5), niobium(+5) or bismuth(+5). Mixed oxide solid solutions of the present invention exhibit enhanced thermal stability, maintaining relatively high surface areas at high temperatures in the presence of water vapor.
Dispersant solutions for dispersing hydrocarbons
Tyndall, R.L.
1997-03-11T23:59:59.000Z
A dispersant solution includes a hydrocarbon dispersing solution derived from a bacterium from ATCC 75527, ATCC 75529, or ATCC 55638.
Dispersant solutions for dispersing hydrocarbons
Tyndall, Richard L. (Clinton, TN)
1997-01-01T23:59:59.000Z
A dispersant solution includes a hydrocarbon dispersing solution derived from a bacterium from ATCC 75527, ATCC 75529, or ATCC 55638.
Integrated Building Management System (IBMS)
Anita Lewis
2012-07-01T23:59:59.000Z
This project provides a combination of software and services that more easily and cost-effectively help to achieve optimized building performance and energy efficiency. Featuring an open-platform, cloud- hosted application suite and an intuitive user experience, this solution simplifies a traditionally very complex process by collecting data from disparate building systems and creating a single, integrated view of building and system performance. The Fault Detection and Diagnostics algorithms developed within the IBMS have been designed and tested as an integrated component of the control algorithms running the equipment being monitored. The algorithms identify the normal control behaviors of the equipment without interfering with the equipment control sequences. The algorithms also work without interfering with any cooperative control sequences operating between different pieces of equipment or building systems. In this manner the FDD algorithms create an integrated building management system.
Pellet Fueling, ELM pacing, and Disruption Mitigation Technology Development for ITER
Baylor, Larry R [ORNL; Combs, Stephen Kirk [ORNL; Foust, Charles R [ORNL; Jernigan, Thomas C [ORNL; Meitner, S. J. [Oak Ridge National Laboratory (ORNL); Parks, P. B. [General Atomics; Caughman, John B [ORNL; Maruyama, S. [ITER International Team, Garching, Germany; Qualls, A L [ORNL; Rasmussen, David A [ORNL; ThomasJr., C. E. [Third Dimension Technologies, LLC, Knoxville, TN
2009-01-01T23:59:59.000Z
Plasma fueling with pellet injection, pacing of edge localized modes (ELMs) by small frequent pellets, and disruption mitigation with gas jets or injected pellets are some of the most important technological capabilities needed for successful operation of ITER. Tools are being developed at Oak Ridge National Laboratory that can be employed on ITER to provide the necessary core pellet fueling and the mitigation of ELMs and disruptions. Here we present progress on the development of the technology to provide reliable high throughput inner wall pellet fueling, pellet ELM pacing with high frequency small pellets, and disruption mitigation with gas jets and pellets. Examples of how these tools can be employed on ITER are discussed.
Development of a coarse-grained water forcefield via multistate iterative Boltzmann inversion
Moore, Timothy C; McCabe, Clare
2015-01-01T23:59:59.000Z
A coarse-grained water model is developed using multistate iterative Boltzmann inversion. Following previous work, the k-means algorithm is used to dynamically map multiple water molecules to a single coarse-grained bead, allowing the use of structure-based coarse-graining methods. The model is derived to match the bulk and interfacial properties of liquid water and improves upon previous work that used single state iterative Boltzmann inversion. The model accurately reproduces the density and structural correlations of water at 305 K and 1.0 atm, stability of a liquid droplet at 305 K, and shows little tendency to crystallize at physiological conditions. This work also illustrates several advantages of using multistate iterative Boltzmann inversion for deriving generally applicable coarse-grained forcefields.
Integrated Dynamic Electron Solutions, Inc. | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362Transmission:portion5 , 3004 SIJI3JII( ' ' 1Department ofAugust30,13,RequestingLandfill Gas7AC
Integrated Dynamic Electron Solutions, Inc. | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362Transmission:portion5 , 3004 SIJI3JII( ' ' 1Department ofAugust30,13,RequestingLandfill
Integrated Dynamic Electron Solutions, Inc. | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362Transmission:portion5 , 3004 SIJI3JII( ' ' 1Department ofAugust30,13,RequestingLandfillTrakLok
Integrated Dynamic Electron Solutions, Inc. | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362Transmission:portion5 , 3004 SIJI3JII( ' ' 1Department ofAugust30,13,RequestingLandfillTrakLok333
Integrated Dynamic Electron Solutions, Inc. | Department of Energy
Office of Environmental Management (EM)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362 of Thomas P.Oil, andEnergyEnvironmentalofResearchNOT MEASUREMENTIntegrated Dynamic Electron
Integrating Security Solutions to Support nanoCMOS Electronics Research
Sinnott, R.O.
Sinnott,R.O. Asenov,A. Bayliss,C. Davenhall,C. Doherty,T. Harbulot,B. Jones,M. Martin,D. Millar,C. Roy,G. Roy,S. Stewart,G. Watt,J. IEEE International Symposium on Parallel and Distributed Processing Systems with Applications, Sydney Australia, December 2008.
Enhancing Performance Contracts: Integrating IAQ Solutions in Hot & Humid Climates
Turner, S. C.
1998-01-01T23:59:59.000Z
in hot and humid climates, and have limited applicability along the Gulf Coast. Humidity control problems are abundant, since cool air at dawn or dusk may be near saturated, and sensible loads may be so low that system sensible heat ratio.... Recovery and outdoor air intake ducts must be close enough to make installation practical. Large air flows require large wheels, and wheel geometry dictates limited equipment configurations. Aggressive maintenance is required to sustain performance...
CBEI - Demonstrating & Deploying Integrated Retrofit Technologies & Solutions
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankShale_Gas.pdfService on the TargetFY12Environmentto WholeII -Langston 1Table o fDOECAPBraun,Demonstrating
Demonstrating & Deploying Integrated Retrofit Technologies & Solutions
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankShale_Gas.pdfService onviii ACRONYMS,Decommissioning Plan RM Decommissioning1217DemandFinishingHeavy
Demonstrating and Deploying Integrated Retrofit Technologies and Solutions
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankShale_Gas.pdfService onviii ACRONYMS,Decommissioning Plan RMDepartment of Energy Optimum HCCI- 2014
TECHNOLOGY SOLUTIONS FOR WIND INTEGRATION IN ERCOT (Technical Report) |
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect1.08]Te[subscript 0.55]Se[subscriptsubstrates (Journal|System forperovskite-typethe 2008
TECHNOLOGY SOLUTIONS FOR WIND INTEGRATION IN ERCOT (Technical Report) |
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect1.08]Te[subscript 0.55]Se[subscriptsubstrates (Journal|System forperovskite-typethe
TECHNOLOGY SOLUTIONS FOR WIND INTEGRATION IN ERCOT (Technical Report) |
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect1.08]Te[subscript 0.55]Se[subscriptsubstrates (Journal|System forperovskite-typetheSciTech
TECHNOLOGY SOLUTIONS FOR WIND INTEGRATION IN ERCOT (Technical Report) |
Office of Scientific and Technical Information (OSTI)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,SeparationConnect1.08]Te[subscript 0.55]Se[subscriptsubstrates (Journal|System
Enhancing Performance Contracts: Integrating IAQ Solutions in Hot & Humid Climates
Turner, S. C.
1998-01-01T23:59:59.000Z
marketplace. STANDARDS Building codes typically establish required minimums for ventilation and some other IAQ- related elements of performance contracts. k addition, widely accepted industry standards are often referenced in building codes, and become... for accomplishing that work. Often, establishing a clearer basis for performance expectations with respect to JAQ is complicated by the age of a facility or the capacity of its existing heating, ventilating, and air conditioning WAC) systems. Buildings...
Comprehensive Solutions for Integration of Solar Resources into Grid
Broader source: Energy.gov (indexed) [DOE]
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports to3,1,50022,3,,0,,6,1,Separation 23 362Transmission: CommentsVirginia. DOCUMENTSDEA has deployed aMeetingsAWhileY-12MarchApril
Demonstrating and Deploying Integrated Retrofit Technologies and Solutions
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: AlternativePerformanceDecember 2013 Happy Holidays from BETO! BETODepartmentDepartmentDemolition|-
Integrated Dynamic Electron Solutions, Inc. | Department of Energy
Broader source: Energy.gov (indexed) [DOE]
is developing a low-cost, advanced lithium-ion battery that employs a novel silicon graphene composite material that will substantially improve battery cycle life. When combined...
Le Roy, Robert J.
1999 Solutions Euclid Contest (Grade12) for the Awards Canadian Mathematics Competition An activity of The Centre for Education in Mathematics and Computing, University of Waterloo, Waterloo, Ontario © 1999 Waterloo Mathematics Foundation #12;1999 Euclid Solutions 2 1. (a) If x 1 1 1 3 4= + , what
A new iterative approach to solving the transport equation
Maslowski Olivares, Alexander Enrique
2009-05-15T23:59:59.000Z
directions, and apply the divergence theorem to the spatial integral of the second term: 4 ( )? ? ?, , ,E V N dS dE d r t E n t ??? ? = ? ? ? ? ? ? ? ? ? ? arrowrightnospintegralloop ( ) ( )?, , , ,tV EdV dE d r E r t E? ?? ?? ? ? ?? ? ? arrowrightnosp... arrowrightnosp ( ) ( ) ( )4 0 ?, , ? ? ?' ' , ' , ' ', , , 'V E s Q r E dV dE d d dE r E E r t Epi ? ? ? ? ? ? ?? ? ? ? ?+ ? ? ? ?+ ? ? ? ? ? ? ? ?? ? ? ? ? ? ? arrowrightnosp arrowrightnosp arrowrightnosp , (3) where =?? tN total change rate...
International Workshop: MFE Roadmapping in the ITER Era | Princeton Plasma
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey Inside the Complex and Powerful World ofIntegratedInterfaceSecurity |Physics Lab
International Workshop: MFE Roadmapping in the ITER Era | Princeton Plasma
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:5 TablesExports(Journal Article) |govInstrumentsmfrirtA Journey Inside the Complex and Powerful World ofIntegratedInterfaceSecurity |Physics LabPhysics
Investigation of statistical iterative reconstruction for dedicated breast CT
Makeev, Andrey; Glick, Stephen J. [UMass Medical School, 55 Lake Avenue North, Worcester, Massachusetts 01655 (United States)] [UMass Medical School, 55 Lake Avenue North, Worcester, Massachusetts 01655 (United States)
2013-08-15T23:59:59.000Z
Purpose: Dedicated breast CT has great potential for improving the detection and diagnosis of breast cancer. Statistical iterative reconstruction (SIR) in dedicated breast CT is a promising alternative to traditional filtered backprojection (FBP). One of the difficulties in using SIR is the presence of free parameters in the algorithm that control the appearance of the resulting image. These parameters require tuning in order to achieve high quality reconstructions. In this study, the authors investigated the penalized maximum likelihood (PML) method with two commonly used types of roughness penalty functions: hyperbolic potential and anisotropic total variation (TV) norm. Reconstructed images were compared with images obtained using standard FBP. Optimal parameters for PML with the hyperbolic prior are reported for the task of detecting microcalcifications embedded in breast tissue.Methods: Computer simulations were used to acquire projections in a half-cone beam geometry. The modeled setup describes a realistic breast CT benchtop system, with an x-ray spectra produced by a point source and an a-Si, CsI:Tl flat-panel detector. A voxelized anthropomorphic breast phantom with 280 ?m microcalcification spheres embedded in it was used to model attenuation properties of the uncompressed woman's breast in a pendant position. The reconstruction of 3D images was performed using the separable paraboloidal surrogates algorithm with ordered subsets. Task performance was assessed with the ideal observer detectability index to determine optimal PML parameters.Results: The authors' findings suggest that there is a preferred range of values of the roughness penalty weight and the edge preservation threshold in the penalized objective function with the hyperbolic potential, which resulted in low noise images with high contrast microcalcifications preserved. In terms of numerical observer detectability index, the PML method with optimal parameters yielded substantially improved performance (by a factor of greater than 10) compared to FBP. The hyperbolic prior was also observed to be superior to the TV norm. A few of the best-performing parameter pairs for the PML method also demonstrated superior performance for various radiation doses. In fact, using PML with certain parameter values results in better images, acquired using 2 mGy dose, than FBP-reconstructed images acquired using 6 mGy dose.Conclusions: A range of optimal free parameters for the PML algorithm with hyperbolic and TV norm-based potentials is presented for the microcalcification detection task, in dedicated breast CT. The reported values can be used as starting values of the free parameters, when SIR techniques are used for image reconstruction. Significant improvement in image quality can be achieved by using PML with optimal combination of parameters, as compared to FBP. Importantly, these results suggest improved detection of microcalcifications can be obtained by using PML with lower radiation dose to the patient, than using FBP with higher dose.
Neace, J.C.
1984-03-13T23:59:59.000Z
A process is claimed for removing diluent degradation products from a solvent extraction solution, which has been used to recover uranium and plutonium from spent nuclear fuel. A wash solution and the solvent extraction solution are combined. The wash solution contains (a) water and (b) up to about, and including, 50 vol % of at least one-polar water-miscible organic solvent based on the total volume of the water and the highly-polar organic solvent. The wash solution also preferably contains at least one inorganic salt. The diluent degradation products dissolve in the highly-polar organic solvent and the organic solvent extraction solvent do not dissolve in the highly-polar organic solvent. The highly-polar organic solvent and the extraction solvent are separated.
Neace, James C. (Blackville, SC)
1986-01-01T23:59:59.000Z
Process for removing diluent degradation products from a solvent extraction solution, which has been used to recover uranium and plutonium from spent nuclear fuel. A wash solution and the solvent extraction solution are combined. The wash solution contains (a) water and (b) up to about, and including, 50 volume percent of at least one-polar water-miscible organic solvent based on the total volume of the water and the highly-polar organic solvent. The wash solution also preferably contains at least one inorganic salt. The diluent degradation products dissolve in the highly-polar organic solvent and the organic solvent extraction solvent do not dissolve in the highly-polar organic solvent. The highly-polar organic solvent and the extraction solvent are separated.
Pellet injection into H-mode ITER plasma with the presence of internal transport barriers
Leekhaphan, P. [Thammasat University, School of Bio-Chemical Engineering and Technology, Sirindhorn International Institute of Technology (Thailand); Onjun, T. [Thammasat University, School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology (Thailand)
2011-04-15T23:59:59.000Z
The impacts of pellet injection into ITER type-1 ELMy H-mode plasma with the presence of internal transport barriers (ITBs) are investigated using self-consistent core-edge simulations of 1.5D BALDUR integrated predictive modeling code. In these simulations, the plasma core transport is predicted using a combination of a semi-empirical Mixed B/gB anomalous transport model, which can self-consistently predict the formation of ITBs, and the NCLASS neoclassical model. For simplicity, it is assumed that toroidal velocity for {omega}{sub E Multiplication-Sign B} calculation is proportional to local ion temperature. In addition, the boundary conditions are predicted using the pedestal temperature model based on magnetic and flow shear stabilization width scaling; while the density of each plasma species, including both hydrogenic and impurity species, at the boundary are assumed to be a large fraction of its line averaged density. For the pellet's behaviors in the hot plasma, the Neutral Gas Shielding (NGS) model by Milora-Foster is used. It was found that the injection of pellet could result in further improvement of fusion performance from that of the formation of ITB. However, the impact of pellet injection is quite complicated. It is also found that the pellets cannot penetrate into a deep core of the plasma. The injection of the pellet results in a formation of density peak in the region close to the plasma edge. The injection of pellet can result in an improved nuclear fusion performance depending on the properties of pellet (i.e., increase up to 5% with a speed of 1 km/s and radius of 2 mm). A sensitivity analysis is carried out to determine the impact of pellet parameters, which are: the pellet radius, the pellet velocity, and the frequency of injection. The increase in the pellet radius and frequency were found to greatly improve the performance and effectiveness of fuelling. However, changing the velocity is observed to exert small impact.
CHARACTERISTICS OF THE H-MODE PEDESTAL AND EXTRAPOLATION TO ITER
OSBORNE,TH; CORDEY,JG; GROEBNER,RJ; HATAE,T; HUBBARD,A; HORTON,LD; KAMADA,Y; KRITZ,A; LAO,LL; LEONARD,AW; LOARTE,A; MAHDAVI,MA; MOSSESSIAN,D; ONJUN,T; OSSENPENKO,M; ROGNLIEN,TD; SAIBNE,G; SNYDER,PB; SUGIHARA,M; SHURYGIN,R; THOMSEN,K; WADE,MR; WILSON,HR; XU,XQ; YATSU,K
2002-11-01T23:59:59.000Z
A271 CHARACTERISTICS OF THE H-MODE PEDESTAL AND EXTRAPOLATION TO ITER. The peeling-ballooning mode model for edge stability along with a model for the H-mode transport barrier width is used as an approach to estimating the H-mode pedestal conditions in ITER. Scalings of the barrier width based on ion-orbit loss, neutral penetration, and turbulence suppression are examined and empirical scalings of the barrier width are presented. An empirical scaling for the pedestal {beta} is derived based on ideas from stability and the empirical width scaling. The impact of the stability model and other factors on ELM size is discussed.
Beyond ITER: Neutral beams for a demonstration fusion reactor (DEMO) (invited)
McAdams, R., E-mail: roy.mcadams@ccfe.ac.uk [EURATOM/CCFE Association, Culham Science Centre, Abingdon, Oxfordshire OX14 3DB (United Kingdom)
2014-02-15T23:59:59.000Z
In the development of magnetically confined fusion as an economically sustainable power source, International Tokamak Experimental Reactor (ITER) is currently under construction. Beyond ITER is the demonstration fusion reactor (DEMO) programme in which the physics and engineering aspects of a future fusion power plant will be demonstrated. DEMO will produce net electrical power. The DEMO programme will be outlined and the role of neutral beams for heating and current drive will be described. In particular, the importance of the efficiency of neutral beam systems in terms of injected neutral beam power compared to wallplug power will be discussed. Options for improving this efficiency including advanced neutralisers and energy recovery are discussed.
Bounds on the map threshold of iterative decoding systems with erasure noise
Wang, Chia-Wen
2008-10-10T23:59:59.000Z
node is l+1i = f( l1; l2; :::; li 1; li+1; :::; ldc); where l+1i is the message passed from check node to bit node for degree type i and iteration l + 1. li is the message passed from bit node to check node for degree type i and iteration l. From... the right in Fig. 2, message sent along the edge from the bit node to the check node is l+1i = g( l1; l2; :::; li 1; li+1; :::; ldc): For the case of transmission over a binary channel, the messages can be com- pressed to a single real quantity...
Gill, D.
2014-01-01T23:59:59.000Z
14-17, 2014 Smart Room Control Solution Architecture Example HVAC Master Controller 1 Light Module Blind Module Power Multisensors Room Sensors Power Mobile App ESL-IC-14-09-05 Proceedings of the 14th International Conference for Enhanced Building... Operations, Beijing, China, September 14-17, 2014 An End-to-End Solution ? Simplified design, installation and integration of integrated room control solutions ? Increased reliability of integrated systems ? Simplified architecture = simpler design...
High Efficiency Integrated Package
Ibbetson, James
2013-09-15T23:59:59.000Z
Solid-state lighting based on LEDs has emerged as a superior alternative to inefficient conventional lighting, particularly incandescent. LED lighting can lead to 80 percent energy savings; can last 50,000 hours – 2-50 times longer than most bulbs; and contains no toxic lead or mercury. However, to enable mass adoption, particularly at the consumer level, the cost of LED luminaires must be reduced by an order of magnitude while achieving superior efficiency, light quality and lifetime. To become viable, energy-efficient replacement solutions must deliver system efficacies of ? 100 lumens per watt (LPW) with excellent color rendering (CRI > 85) at a cost that enables payback cycles of two years or less for commercial applications. This development will enable significant site energy savings as it targets commercial and retail lighting applications that are most sensitive to the lifetime operating costs with their extended operating hours per day. If costs are reduced substantially, dramatic energy savings can be realized by replacing incandescent lighting in the residential market as well. In light of these challenges, Cree proposed to develop a multi-chip integrated LED package with an output of > 1000 lumens of warm white light operating at an efficacy of at least 128 LPW with a CRI > 85. This product will serve as the light engine for replacement lamps and luminaires. At the end of the proposed program, this integrated package was to be used in a proof-of-concept lamp prototype to demonstrate the component’s viability in a common form factor. During this project Cree SBTC developed an efficient, compact warm-white LED package with an integrated remote color down-converter. Via a combination of intensive optical, electrical, and thermal optimization, a package design was obtained that met nearly all project goals. This package emitted 1295 lm under instant-on, room-temperature testing conditions, with an efficacy of 128.4 lm/W at a color temperature of ~2873K and 83 CRI. As such, the package’s performance exceeds DOE’s warm-white phosphor LED efficacy target for 2013. At the end of the program, we assembled an A19 sized demonstration bulb housing the integrated package which met Energy Star intensity variation requirements. With further development to reduce overall component cost, we anticipate that an integrated remote converter package such as developed during this program will find application in compact, high-efficacy LED-based lamps, particularly those requiring omnidirectional emission.
Meng, Da; Zheng, Bin; Lin, Guang; Sushko, Maria L.
2014-08-29T23:59:59.000Z
We have developed efficient numerical algorithms for the solution of 3D steady-state Poisson-Nernst-Planck equations (PNP) with excess chemical potentials described by the classical density functional theory (cDFT). The coupled PNP equations are discretized by finite difference scheme and solved iteratively by Gummel method with relaxation. The Nernst-Planck equations are transformed into Laplace equations through the Slotboom transformation. Algebraic multigrid method is then applied to efficiently solve the Poisson equation and the transformed Nernst-Planck equations. A novel strategy for calculating excess chemical potentials through fast Fourier transforms is proposed which reduces computational complexity from O(N2) to O(NlogN) where N is the number of grid points. Integrals involving Dirac delta function are evaluated directly by coordinate transformation which yields more accurate result compared to applying numerical quadrature to an approximated delta function. Numerical results for ion and electron transport in solid electrolyte for Li ion batteries are shown to be in good agreement with the experimental data and the results from previous studies.
Evolution of smooth shapes and integrable systems
Irina Markina; Alexander Vasil'ev
2011-11-05T23:59:59.000Z
We consider a homotopic evolution in the space of smooth shapes starting from the unit circle. Based on the Loewner-Kufarev equation we give a Hamiltonian formulation of this evolution and provide conservation laws. The symmetries of the evolution are given by the Virasoro algebra. The `positive' Virasoro generators span the holomorphic part of the complexified vector bundle over the space of conformal embeddings of the unit disk into the complex plane and smooth on the boundary. In the covariant formulation they are conserved along the Hamiltonian flow. The `negative' Virasoro generators can be recovered by an iterative method making use of the canonical Poisson structure. We study an embedding of the Loewner-Kufarev trajectories into the Segal-Wilson Grassmannian, construct the tau-function, the Baker-Akhiezer function, and finally, give a class of solutions to the KP equation.
Hanford site integrated pest management plan
Giddings, R.F.
1996-04-09T23:59:59.000Z
The Hanford Site Integrated Pest Management Plan (HSIPMP) defines the Integrated Pest Management (IPM) decision process and subsequent strategies by which pest problems are to be solved at all Hanford Site properties per DOE-RL Site Infrastructure Division memo (WHC 9505090). The HSIPMP defines the roles that contractor organizations play in supporting the IPM process. In short the IPM process anticipates and prevents pest activity and infestation by combining several strategies to achieve long-term pest control solutions.
Raffray, A. René
of the first wall components, direct plasma contact to the first wall at moderate power (7.5 MW) is possible1 PROGRESS OF ITER FIRST WALL DESIGN R. Mitteau(*), R. Raffray(*), P. Chappuis(*), M. Merola(*), D ABSTRACT The blanket first wall concept has substantially evolved since the ITER design review of 2007
heating will be more difficult to predict and control than existing heating systems such as NBI and ICRH and their implications for alpha particle measurements. A comparison is made between alpha heating in ITER and NBI and ICRH heating systems in present tokamaks, and alpha particle issues in ITER are discussed in three
and control than existing heating systems such as NBI and ICRH. In addition, alpha particle heating and loss measurements. A comparison is made between alpha heating in ITER and NBI and ICRH heating systems in present in ITER requires about 300 MW of alpha particle heating power. Since the alpha particle creation rate
ITER-FEAT Operation Y. Shimomura 1), R. Aymar 2), V. Chuyanov 2), M. Huguet 1), H. Matsumoto 2),
pulse hybrid modes, non-inductive steady-state modes, with large ranges of plasma current, density, beta and fusion power, and with various heating and current drive methods. This flexibility will provide are discussed in this paper. 2. Overview of ITER Operation After commissioning the ITER system, the tokamak
Experimental Reactor (ITER). Japan yesterday revealed the details of a proposal to host the project. Tokyo has, Japan bears half price even with construction inside the EU limits of the accessory structures prospect. The experimental device in order ITER generates electricity, reproducing the fusion reaction
The effect of axial strain cycling on the critical current density and n-value of ITER niobium-tin
Hampshire, Damian
The effect of axial strain cycling on the critical current density and n-value of ITER niobium niobium-tin VAC and EM-LMI strands and the detailed characterisation of the EM-LMI-TFMC strand at -0 current density and n-value of two ITER candidate niobium-tin strands (EM- LMI and VAC). The strands were
the negotiations between the six partners of ITER, the international thermonuclear reactor project, in the very and upgrading of supportive facilities to the ITER Â reactor itself. Given the joint commitment to fusion energy should take into account a number of principles such as scientific autonomy, complementarity
that the government expects the European Union take into account this Spanish financial commitment in the final ITER site between France, with the Cadarache site, and Spain with Vandellos. The Spanish government has% of the ITER construction costs (4500 million Euros) instead of the 10% to which the government initially
Bystroff, Chris
submitted to International Journal of Computer Vision June, 2002 The Dual-Bootstrap Iterative initial estimate. By contrast, the Dual-Bootstrap ICP algorithm only requires an initial estimate iteratively "bootstraps" both the region over which the model is accurate and the chosen transformation model
Bystroff, Chris
submitted to International Journal of Computer Vision June, 2002 The Dual-Bootstrap Iterative initial estimate. By contrast, the Dual-Bootstrap ICP algorithm only requires an initial estimate iteratively \\bootstraps" both the region over which the model is accurate and the chosen transformation model
Sustainable and Holistic Integration of Energy Storage and Solar PV (SHINES) Funding Opportunity
Broader source: Energy.gov [DOE]
The Sustainable and Holistic Integration of Energy Storage and Solar PV (SHINES) solution as envisioned by SunShot will have the following features:
MA54200 HOMEWORK 1.3. Show that the principal value integral ...
2008-09-15T23:59:59.000Z
MA54200 HOMEWORK. ASSIGNMENT 1: SOLUTIONS. 1.3. Show that the principal value integral. p.v.. ? ?(x) x dx = lim. ??0+. (? ??. ?? ?(x) x dx +. ? ?. ?.
Integrated Deployment Model: A Comprehensive Approach to Transforming the Energy Economy
Werner, M.
2010-11-01T23:59:59.000Z
This paper describes the Integrated Deployment model to accelerate market adoption of alternative energy solutions to power homes, businesses, and vehicles through a comprehensive and aggressive approach.
Separations and safeguards model integration.
Cipiti, Benjamin B.; Zinaman, Owen
2010-09-01T23:59:59.000Z
Research and development of advanced reprocessing plant designs can greatly benefit from the development of a reprocessing plant model capable of transient solvent extraction chemistry. This type of model can be used to optimize the operations of a plant as well as the designs for safeguards, security, and safety. Previous work has integrated a transient solvent extraction simulation module, based on the Solvent Extraction Process Having Interaction Solutes (SEPHIS) code developed at Oak Ridge National Laboratory, with the Separations and Safeguards Performance Model (SSPM) developed at Sandia National Laboratory, as a first step toward creating a more versatile design and evaluation tool. The goal of this work was to strengthen the integration by linking more variables between the two codes. The results from this integrated model show expected operational performance through plant transients. Additionally, ORIGEN source term files were integrated into the SSPM to provide concentrations, radioactivity, neutron emission rate, and thermal power data for various spent fuels. This data was used to generate measurement blocks that can determine the radioactivity, neutron emission rate, or thermal power of any stream or vessel in the plant model. This work examined how the code could be expanded to integrate other separation steps and benchmark the results to other data. Recommendations for future work will be presented.
2006-12-07T23:59:59.000Z
Assignment 5 Solutions. James Vanderhyde. 1. Problem 31.2-6. Recall F1 = 0, F2 = 1, and Fk+1 = Fk + Fk?1 for k > 2. By the discussion in the book ...
Strategic Biomass Solutions (Mississippi)
Broader source: Energy.gov [DOE]
The Strategic Biomass Solutions (SBS) was formed by the Mississippi Technology Alliance in June 2009. The purpose of the SBS is to provide assistance to existing and potential companies, investors...
Kostas Skenderis; Marika Taylor
2008-05-23T23:59:59.000Z
We present a comprehensive analysis of holography for the bubbling solutions of Lin-Lunin-Maldacena. These solutions are uniquely determined by a coloring of a 2-plane, which was argued to correspond to the phase space of free fermions. We show that in general this phase space distribution does not determine fully the 1/2 BPS state of N=4 SYM that the gravitational solution is dual to, but it does determine it enough so that vevs of all single trace 1/2 BPS operators in that state are uniquely determined to leading order in the large N limit. These are precisely the vevs encoded in the asymptotics of the LLM solutions. We extract these vevs for operators up to dimension 4 using holographic renormalization and KK holography and show exact agreement with the field theory expressions.
Apr 25, 2015 ... Math 373. Spring 2015. Quiz 5. April 16, 2015. 1. In a short sale of a stock, there is credit risk. Define credit risk. Solution: Credit risk is the risk ...
or structure--and they generate approximately 15 percent of all green- house gas emissions.2 Excluding staffing management and greenhouse gas emissions. Automated operations management: IBM solutions provide automated
Residential Energy Efficiency Solutions
Broader source: Energy.gov [DOE]
Our mission is to increase the availability of high-quality, safe, affordable and workforce housing options. Through innovative reuse and rehabilitation we incorporate economic benefits, environmental stewardship/energy efficiency, and social solutions.
A Hybrid Iterative Solver for Robustly Capturing Coulomb Friction in Hair Dynamics
A Hybrid Iterative Solver for Robustly Capturing Coulomb Friction in Hair Dynamics Gilles Daviet-slip instabilities. See the accompanying video for the full animations. Abstract Dry friction between hair fibers a hybrid strategy that combines a new zero-finding formulation of (exact) Coulomb friction together
be solved exactly and approximation techniques are required. In approximate policy iteration (API issues, mainly 3 and 4,1 variants of API have been proposed that replace the usual value function label. In this case, (x, a) for the rest of the actions are labeled negative and added to the training
Fessler, Jeffrey A.
-ray computed tomography. The effects of the quantization error in forward-projection, back computed tomography (CT) have been proposed to improve image quality and reduce dose [1]. These methodsPERTURBATION-BASED ERROR ANALYSIS OF ITERATIVE IMAGE RECONSTRUCTION ALGORITHM FOR X-RAY COMPUTED
Iterative-Expansion A* Colin M. Potts and Kurt D. Krebsbach
Krebsbach, Kurt D.
Iterative-Expansion A* (IEA*), fo- cuses on reducing redundant node expansions within indi- vidual depth IEA* with several other competing approaches. We also sketch proofs of optimality and com- pleteness for IEA*, and note that IEA* is particularly ef- ficient for solving implicitly-defined general graph
AUTOMATIC PARAMETER SETTING FOR ITERATIVE SHRINKAGE METHODS Raja Giryes, Michael Elad
Eldar, Yonina
AUTOMATIC PARAMETER SETTING FOR ITERATIVE SHRINKAGE METHODS Raja Giryes, Michael Elad Technion- dressed the automatic tuning of based on a generalized Stein Unbiased Risk Estimator (SURE) of the mean. We also show that the proposed scheme serves as a very reliable automatic halting mechanism
Analyzing Social Network Structures in the Iterated Prisoner's Dilemma with Choice and Refusal
Tesfatsion, Leigh
Analyzing Social Network Structures in the Iterated Prisoner's Dilemma with Choice and Refusal Mark structures emerge. We examine one particular IPD/CR environment and document the social network methods used within this environment. In particular, the social networks of interesting populations
Improved Confinement in JET High {beta} Plasmas with an ITER-Like Wall
Challis, C D; Beurskens, M; Buratti, P; Delabie, E; Drewelow, P; Frassinetti, L; Giroud, C; Hawkes, N; Hobirk, J; Joffrin, E; Keeling, D; King, D B; Maggi, C F; Mailloux, J; Marchetto, C; McDonald, D; Nunes, I; Pucella, G; Saarelma, S; Simpson, J
2015-01-01T23:59:59.000Z
The replacement of the JET carbon wall (C-wall) by a Be/W ITER-like wall (ILW) has affected the plasma energy confinement. To investigate this, experiments have been performed with both the C-wall and ILW to vary the heating power over a wide range for plasmas with different shapes.
Neil Calder -neil.calder@iter.org +33 6 14 16 41 75
nuclear fusion energy in the next decades, could change for the better the way we all live on Earth and allow next generations to benefit from abundant and infinite forms of energy, respectful to our planet for the next years, export control, peaceful uses of ITER technology and non-proliferation, the Test Blanket
Neil Calder -neil.calder@iter.org +33 6 14 16 41 75
, the ITER Organization's draft budget for the next years, Export Control, Peaceful Uses and Non, explains the promise and challenges of fusion as an energy source, concentrating on the contribution of energy is released. Fusion research is aimed at developing a safe, limitless and environmentally
Sillito, Jonathan
processes that have been successfully implemented by others, to reduce the risk of failure [1]. The company under study is a large Oil & Gas government agency that lacked the initial management support to adopt an iterative development approach as well as the degree of formality and traceability desired by the top
Materials Labs S. Zinkle Fusion Technology S. Milora 5:30 Depart ORNL 6:00 Reception 7:30 Board:50 Preparations for NIF Ignition Campaign John Lindl, LLNL 9:10 Status of Z-Pinch Research Keith Matzen Technology Program Stan Milora, ORNL 1:40 Issues and Opportunities from ITER Review R. Hawryluk, PPPL 2
Investigating the Impact of Changes in Iteration-likelihoods on Design Process Performance
Shapiro, Daniel; Hamraz, Bahram; Sommer, Anita F.; Clarkson, P. John
2015-01-01T23:59:59.000Z
1 Investigating the Impact of Changes in Iteration-likelihoods on Design Process Performance Authors: Daniel Shapiro(1) (corresponding author, ds678@cam.ac.uk, +447922058809), Bahram Hamraz(2) (bh351@cam.ac.uk), Anita F. Sommer(1) (afs35@cam...
Amesos2 and Belos: Direct and Iterative Solvers for Large Sparse Linear Systems
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Bavier, Eric; Hoemmen, Mark; Rajamanickam, Sivasankaran; Thornquist, Heidi
2012-01-01T23:59:59.000Z
Solvers for large sparse linear systems come in two categories: direct and iterative. Amesos2, a package in the Trilinos software project, provides direct methods, and Belos, another Trilinos package, provides iterative methods. Amesos2 offers a common interface to many different sparse matrix factorization codes, and can handle any implementation of sparse matrices and vectors, via an easy-to-extend C++ traits interface. It can also factor matrices whose entries have arbitrary “Scalar” type, enabling extended-precision and mixed-precision algorithms. Belos includes many different iterative methods for solving large sparse linear systems and least-squares problems. Unlike competing iterative solver libraries, Belos completely decouples themore »algorithms from the implementations of the underlying linear algebra objects. This lets Belos exploit the latest hardware without changes to the code. Belos favors algorithms that solve higher-level problems, such as multiple simultaneous linear systems and sequences of related linear systems, faster than standard algorithms. The package also supports extended-precision and mixed-precision algorithms. Together, Amesos2 and Belos form a complete suite of sparse linear solvers.« less
Using Hidden Markov Models for Iterative Non-intrusive Appliance Monitoring
Southampton, University of
Using Hidden Markov Models for Iterative Non-intrusive Appliance Monitoring Oliver Parson, Hampshire, SO17 1BJ, UK {op106,sg2,mjw,acr}@ecs.soton.ac.uk Abstract Non-intrusive appliance load monitoring appliances. 1 Introduction Non-intrusive appliance load monitoring (NIALM), or energy disaggregation, aims
A Generalized Iterative Water-filling Algorithm for Distributed Power Control in the Presence
Luo, Zhi-Quan "Tom"
1 A Generalized Iterative Water-filling Algorithm for Distributed Power Control in the Presence Engineering University of Minnesota, Minneapolis, MN 55455 Department of Industrial and Enterprise Systems and a jammer share a common spectrum of N orthogonal tones. Both the users and the jammer have limited power
the Next Step for FE in China beyond ITER 10 -11 Dec.2013 Washington DC
-sustained with TBR 1.2 Relay on existing ITER physicalk~1. 8-2, q > 3, H~1) and technical bases The goal of our design is to try to build the engineering testing reactor for fusion energy as early. CFETR will be one of the best test facility to develop the suitable materials for DEMO or FPP under
A Decade of Progress in Iterative Process Control Design : from Theory to Practice
Gevers, Michel
A Decade of Progress in Iterative Process Control Design : from Theory to Practice Michel Gevers a on Identification (Gevers, 1991) 1 The last ten years have seen the emergence of robust control theory as a ma- jor for some time. The sur- prising fact is that much of robust control theory is based on prior descriptions
High-Steady-State Advanced Tokamak Regimes for ITER and FIRE D. M. Meade1
FT High- Steady-State Advanced Tokamak Regimes for ITER and FIRE D. M. Meade1 , N. R. Sauthoff1 , C Institute of Technology, Cambridge, MA 02139, USA An attractive tokamak-based fusion power plant will require the development of high- steady- state advanced tokamak regimes to produce a high gain burning
BPO Inputs to ITER Design Review on Pellet Pacing, RMP and RWM Coils,
BPO Inputs to ITER Design Review on Pellet Pacing, RMP and RWM Coils, and Disruption Mitigation Collaboration Essential Ingredient Contributions to Pellet Pacing USBPO: L. Baylor and P. Parks EU: P. Lang, A the acceptable energy loss from ELMs. Reducing the energy loss to pellet pacing is challenging. DIII
Annual Report of the EURATOM/UKAEA Fusion Programme 2007/08 8 ITER Systems
to measure the electron temperature and density profiles; · core charge exchange recombination spectroscopy (CXRS) to measure the helium (ash) content, the ion temperature and flow; · Ion Cyclotron Resonance of welding techniques for the ITER Vacuum Vessel. There has also been work by Durham University
An Auto-Generated Real-Time Iteration Algorithm for Nonlinear MPC in the Microsecond Range
. Yet a differ- ent approach is the nonlinear real-time iteration (RTI) scheme [11,13]. Like. An overview of existing algorithms for fast non- linear MPC can be found in [14]. The RTI scheme has is to demonstrate that NMPC algorithms based on the RTI scheme can be optimized and auto-generated efficiently
A REAL-TIME ITERATION SCHEME FOR NONLINEAR OPTIMIZATION IN OPTIMAL FEEDBACK CONTROL
" and within the research project "Optimization Based Control of Chemical Processes." httpA REAL-TIME ITERATION SCHEME FOR NONLINEAR OPTIMIZATION IN OPTIMAL FEEDBACK CONTROL MORITZ DIEHL, HANS GEORG BOCK, AND JOHANNES P. SCHL¨ODER SIAM J. CONTROL OPTIM. c 2005 Society for Industrial
Zhang, Jun
Convergence Proof of Jacobi Iterative Method for A Discretized 2D ConvectionÂDiffusion Equation \\Lambda Deyu Sang, y Jun Zhang, z and Shiqing Zhang y July 16, 1998 Abstract We prove that the Jacobi been verified numerically but evaded rigorous justification for almost two decades. Key words: Jacobi
Fixed-point iterative sweeping methods for static Hamilton-Jacobi equations
Zhang, Yong-Tao
Fixed-point iterative sweeping methods for static Hamilton-Jacobi equations Yong-Tao Zhang1 , Hong for computations of static Hamilton-Jacobi equations. They take advantage of the properties of hyperbolic PDEs and try to cover a family of characteristics of the corresponding Hamilton-Jacobi equation in a certain
PUBLISHED VERSION Overview of LH experiments in JET with an ITER-like wall
. The impact of these contributions on the performance of the auxiliary heating systems and the main achievements by these were reviewed in [2]. The main aspects of the operation of the Lower Hybrid (LH) system Republic Abstract: An overview of the recent results of Lower Hybrid (LH) experiments at JET with the ITER
HEART SEGMENTATION WITH AN ITERATIVE CHAN-VESE OLIVIER ROUSSEAU, YVES BOURGAULT
Paris-Sud XI, Université de
HEART SEGMENTATION WITH AN ITERATIVE CHAN-VESE ALGORITHM OLIVIER ROUSSEAU, YVES BOURGAULT Abstract. This paper presents 2D and 3D applications of the Chan-Vese model to heart and trachea segmentation. We is to segment the heart muscle from high resolution CT scans of the thorax and to produce meshes
The 1D Iterative Model for Predicting Thermal Radiation from a Jet Fire
Paris-Sud XI, Université de
manuscript, published in "6. International Seminar on Fire and Explosion Hazards (FEH), Leeds : UnitedThe 1D Iterative Model for Predicting Thermal Radiation from a Jet Fire Leroy, G.* and Duplantier of the current jet fire models used in the accidental fire risks department are semi- empirical. They depend
Iterative Spatial Sequence Estimator for Multi-Group Space Time Trellis Coded Systems
Al-Ghadhban, Samir
Iterative Spatial Sequence Estimator for Multi-Group Space Time Trellis Coded Systems Samir Al. The developed detector is called maximum a posteriori spatial sequence estimator and it has the flexibility. A novel spatial sequence estimator (SSE) for V-BLAST is proposed in [4]. The algorithm combines group
An Iterative Image Registration Technique with an Application to Stereo Vision
Granada, Universidad de
121 An Iterative Image Registration Technique with an Application to Stereo Vision Bruce D. Lucas of the image, including rotation. We then describe a stereo vision system that uses this registration technique Abstract Image registration finds a variety of applications in computer vision. Unfortunately, traditional
Design, manufacture and initial operation of the beryllium components of the JET ITER-like wall
Riccardo, V; Matthews, G F; Nunes, I; Thompson, V; Villedieu, E; Contributors, JET EFDA
2013-01-01T23:59:59.000Z
The aim of the JET ITER-like Wall Project was to provide JET with the plasma facing material combination now selected for the DT phase of ITER (bulk beryllium main chamber limiters and a full tungsten divertor) and, in conjunction with the upgraded neutral beam heating system, to achieve ITER relevant conditions. The design of the bulk Be plasma facing components had to be compatible with increased heating power and pulse length, as well as to reuse the existing tile supports originally designed to cope with disruption loads from carbon based tiles and be installed by remote handling. Risk reduction measures (prototypes, jigs, etc) were implemented to maximize efficiency during the shutdown. However, a large number of clashes with existing components not fully captured by the configuration model occurred. Restarting the plasma on the ITER-like Wall proved much easier than for the carbon wall and no deconditioning by disruptions was observed. Disruptions have been more threatening than expected due to the redu...
Theory needs for NSTX-U and ITER J. Menard, S. Kaye, and the
Theory needs for NSTX-U and ITER J. Menard, S. Kaye, and the NSTX-U Topical Science Group Leaders PPPL Theory Department Retreat Princeton University and PPPL September 24-25 and 27, 2012 NSTX Wisconsin X Science LLC #12;NSTX-U PPPL Theory Department Retreat September 24, 25, 27 2 Outline · NSTX
Makous, Walter
cough or flap (a wing)'. In English, John coughed can be understood as saying that he coughed once implications, especially those of intensity and/or prolongation. In English, John coughed and coughed is iterative in interpretation, like one understanding of the simple John coughed, but in addition implies
Synthesizing Representative I/O Workloads Using Iterative Distillation Zachary Kurmas
Kurmas, Zachary
Synthesizing Representative I/O Workloads Using Iterative Distillation Zachary Kurmas College proper- ties are "key" for a given workload and storage system. We have developed a tool, the Distiller, that automati- cally identifies the key properties ("attribute-values") of the workload. The Distiller then uses
Home National Sports Business World Features Columns Editorial Japan has key role in ITER project
would house a mass of precision machines used to control the colossal amount of energy it would generateHome National Sports Business World Features Columns Editorial Top Japan has key role in ITER reactor has been settled after a contest lasting several years between Japan and the European Union
Abhayapala, Thushara D.
ITERATIVE EXTRAPOLATION ALGORITHM FOR DATA RECONSTRUCTION OVER SPHERE Wen Zhang, Rodney A. Kennedy and Engineering The Australian National University Email: wen@cecs.anu.edu.au, rodney.kennedy@anu.edu.au, thushara, or colatitude and 0 360 is the azimuthal angle. The expansion of a function f L2 (S2 ) can be written as f
THE PATH TOWARD MAGNETIC FUSION ENERGY DEMONSTRATON AND THE ROLE OF ITER
Abdou, Mohamed
1 THE PATH TOWARD MAGNETIC FUSION ENERGY DEMONSTRATON AND THE ROLE OF ITER ABDOU, M. A. Center to enable a transition to fusion energy demonstration (DEMO). Fusion Nuclear Science and Technology (FNST conducting magnets. 1. Introduction: Fusion has great potential to be a sustainable energy source
On the Role of Update Constraints and TextTypes in Iterative Learning
Stephan, Frank
On the Role of Update Constraints and TextTypes in Iterative Learning Sanjay Jain 1,# , Timo learning considers therefore the usage of classpreserving oneone hypothesis spaces which limit this type of coding during the learning process. Other ways to limit it is to control the amount and types of updates
A Model-Based Iterative Algorithm for Dual-Energy X-Ray CT Reconstruction
A Model-Based Iterative Algorithm for Dual-Energy X-Ray CT Reconstruction Ruoqiao Zhang, Jean, Senior Member, IEEE Abstract--Recent developments in dual-energy X-ray CT have shown a number of benefits the opportunity to reduce noise and artifacts in dual energy reconstructions. However, previous approaches
Nangare, Nitin Ashok
2006-08-16T23:59:59.000Z
in an error free manner through the use of a capacity achieving code for a memoryless channel. Computational complexity of the proposed receiver structure is less than that of one iteration of the turbo receiver. We also provide the proof showing...
Feder, Meir
846 IEEE TRANSACTIONS ON SIGNAL PROCESSING, VOL. 42, NO. 4, APRIL 1994 Iterative and Sequential Algorithms for Multisensor Signal Enhancement Bhud Weinstein, Fellow, IEEE, ,Alan V. Oppenheim, Fellow, IEEE of enhancing a desired signal in the presence of noise, multiple sensor measurements will typically have
Europe and Japan with the elbow-with-elbow to accomodate engine ITER
.12.03|13h1713h17 ? The competition for the machine installation of with thermonuclear fusion is announced, selected after a survey campaign, where the experimental engine with thermonuclear fusion ITER experts - thermonuclear fusion, who come to supra establish a new record in the engine with Tore fusion
Iterative receivers for OFDM systems with dispersive fading and frequency offset
Liu, Hui
2004-09-30T23:59:59.000Z
2. Carrier Frequency O set Estimation . . . . . . . . . . 38 C. Simulation Results . . . . . . . . . . . . . . . . . . . . . . 41 VI APPLICATION OF THE PROPOSED ITERATIVE RE- CEIVER FOR NEW BROAD-BAND MIMO FADING CHAN- NEL MODEL... : : : : : : : : : : : : : : : : : : : : : : : : : : : : 48 A. Broad-Band MIMO Fading Channel Model . . . . . . . . . 48 vii CHAPTER Page 1. Channel Model . . . . . . . . . . . . . . . . . . . . . . 48 2. Fading Statistics . . . . . . . . . . . . . . . . . . . . . 50 B. Simulation Results...
Joint News Release CHINA AND THE U.S. JOIN ITER NEGOTIATIONS
in their efforts to reach agreement on the implementation of the ITER international fusion energy research project. Igor Borovkov, First Deputy Minister of the Russian Federation on Atomic Energy, welcomed all' commitment to developing fusion energy as a potential source of safe, secure and environmentally friendly
Praha 12/04/2007 Physics challenges and open issues of burning plasma physics in ITER
Zonca, Fulvio
of the fast ion source build-up: multi-scale approach Multi-mode simulations: so far mostly one or a few (AEs) (IV.2) Nonlinear physics of EP Modes (EPMs) (V) Long time scale behaviors and turbulence cross scale couplings (VI) ITER Applications (VII) Summary and Discussions #12;Praha 12/04/2007 Physics
Europe et Japon au coude--coude pour accueillir le racteur ITER
LE 18.12.03 | 13h1713h17 · La compétition pour l'implantation de la machine à fusion thermonucléaire expérimental à fusion thermonucléaire ITER. S'il fait penser à la hampe d'un drapeau fichée sur un sommet spécialistes - dont une cinquantaine d'experts étrangers - de la fusion thermonucléaire, qui viennent d
Global Convergence of An Iterative Gradient Algorithm for The Nash Equilibrium in An
Pavel, Lacra
Global Convergence of An Iterative Gradient Algorithm for The Nash Equilibrium in An Extended OSNR constraints within a Nash game framework. In optical wavelength-division multiplexed (WDM) networks, all as the optical link capacity constraint. In our previous work in [1], we proposed an extended OSNR Nash game
Path Integral Representations on the Complex Sphere
Christian Grosche
2007-10-23T23:59:59.000Z
In this paper we discuss the path integral representations for the coordinate systems on the complex sphere S3C. The Schroedinger equation, respectively the path integral, separates in exactly 21 orthogonal coordinate systems. We enumerate these coordinate systems and we are able to present the path integral representations explicitly in the majority of the cases. In each solution the expansion into the wave-functions is stated. Also, the kernel and the corresponding Green function can be stated in closed form in terms of the invariant distance on the sphere, respectively on the hyperboloid.
The Lorentz Integral Transform and its Inversion
N. Barnea; V. D. Efros; W. Leidemann; G. Orlandini
2009-12-23T23:59:59.000Z
The Lorentz integral transform method is briefly reviewed. The issue of the inversion of the transform, and in particular its ill-posedness, is addressed. It is pointed out that the mathematical term ill-posed is misleading and merely due to a historical misconception. In this connection standard regularization procedures for the solution of the integral transform problem are presented. In particular a recent one is considered in detail and critical comments on it are provided. In addition a general remark concerning the concept of the Lorentz integral transform as a method with a controlled resolution is made.
Nebraska Statewide Wind Integration Study: April 2008 - January 2010
EnerNex Corporation, Knoxville, Tennessee; Ventyx, Atlanta, Georgia; Nebraska Power Association, Lincoln, Nebraska
2010-03-01T23:59:59.000Z
Wind generation resources in Nebraska will play an increasingly important role in the environmental and energy security solutions for the state and the nation. In this context, the Nebraska Power Association conducted a state-wide wind integration study.
Twin-Screw Extruder Development for the ITER Pellet Injection System
Meitner, Steven J [ORNL; Baylor, Larry R [ORNL; Combs, Stephen Kirk [ORNL; Fehling, Dan T [ORNL; McGill, James M [ORNL; Rasmussen, David A [ORNL; Leachman, J. W. [University of Wisconsin, Madison
2009-01-01T23:59:59.000Z
The ITER pellet injection system is comprised of devices to form and accelerate pellets, and will be connected to inner wall guide tubes for fueling, and outer wall guide tubes for ELM pacing. An extruder will provide a stream of solid hydrogen isotopes to a secondary section, where pellets are cut and accelerated with a gas gun into the plasma. The ITER pellet injection system is required to provide a plasma fueling rate of 120 Pa-m3/s (900 mbar-L/s) and durations of up to 3000 s. The fueling pellets will be injected at a rate up to 10 Hz and pellets used to trigger ELMs will be injected at higher rates up to 20 Hz. A twin-screw extruder for the ITER pellet injection system is under development at the Oak Ridge National Laboratory. A one-fifth ITER scale prototype has been built and has demonstrated the production of a continuous solid deuterium extrusion. The 27 mm diameter, intermeshed, counter-rotating extruder screws are rotated at a rate up to ?5 rpm. Deuterium gas is pre-cooled and liquefied and solidified in separate extruder barrels. The precooler consists of a deuterium gas filled copper coil suspended in a separate stainless steel vessel containing liquid nitrogen. The liquefier is comprised of a copper barrel connected to a Cryomech AL330 cryocooler, which has a machined helical groove surrounded by a copper jacket, through which the pre-cooled deuterium condenses. The lower extruder barrel is connected to a Cryomech GB-37 cryocooler to solidify the deuterium (at ?15 K) before it is forced through the extruder die. The die forms the extrusion to a 3 mm x 4 mm rectangular cross section. Design improvements have been made to improve the pre-cooler and liquefier heat exchangers, to limit the loss of extrusion through gaps in the screws. This paper will describe the design improvements for the next iteration of the extruder prototype.
the International Thermonuclear Experimental Reactor (ITER), the world's first nuclear- fusion reactor. Japan fought wins by withdrawing ITER bid Thermonuclear fusion utilizes the same process that powers the sun -- nuclear-fusion reactions -- to produce energy. Scientists at the ITER plant will create nuclear-fusion
Iterative acceleration methods for Monte Carlo and deterministic criticality calculations
Urbatsch, T.J.
1995-11-01T23:59:59.000Z
If you have ever given up on a nuclear criticality calculation and terminated it because it took so long to converge, you might find this thesis of interest. The author develops three methods for improving the fission source convergence in nuclear criticality calculations for physical systems with high dominance ratios for which convergence is slow. The Fission Matrix Acceleration Method and the Fission Diffusion Synthetic Acceleration (FDSA) Method are acceleration methods that speed fission source convergence for both Monte Carlo and deterministic methods. The third method is a hybrid Monte Carlo method that also converges for difficult problems where the unaccelerated Monte Carlo method fails. The author tested the feasibility of all three methods in a test bed consisting of idealized problems. He has successfully accelerated fission source convergence in both deterministic and Monte Carlo criticality calculations. By filtering statistical noise, he has incorporated deterministic attributes into the Monte Carlo calculations in order to speed their source convergence. He has used both the fission matrix and a diffusion approximation to perform unbiased accelerations. The Fission Matrix Acceleration method has been implemented in the production code MCNP and successfully applied to a real problem. When the unaccelerated calculations are unable to converge to the correct solution, they cannot be accelerated in an unbiased fashion. A Hybrid Monte Carlo method weds Monte Carlo and a modified diffusion calculation to overcome these deficiencies. The Hybrid method additionally possesses reduced statistical errors.
Nonlinear Integral-Equation Formulation of Orthogonal Polynomials
Carl M. Bender; E. Ben-Naim
2006-11-15T23:59:59.000Z
The nonlinear integral equation P(x)=\\int_alpha^beta dy w(y) P(y) P(x+y) is investigated. It is shown that for a given function w(x) the equation admits an infinite set of polynomial solutions P(x). For polynomial solutions, this nonlinear integral equation reduces to a finite set of coupled linear algebraic equations for the coefficients of the polynomials. Interestingly, the set of polynomial solutions is orthogonal with respect to the measure x w(x). The nonlinear integral equation can be used to specify all orthogonal polynomials in a simple and compact way. This integral equation provides a natural vehicle for extending the theory of orthogonal polynomials into the complex domain. Generalizations of the integral equation are discussed.