Conserved charges in 3D gravity
Blagojevic, M.; Cvetkovic, B. [University of Belgrade, Institute of Physics, P. O. Box 57, 11001 Belgrade (Serbia)
2010-06-15T23:59:59.000Z
The covariant canonical expression for the conserved charges, proposed by Nester, is tested on several solutions in three-dimensional gravity with or without torsion and topologically massive gravity. In each of these cases, the calculated values of energy momentum and angular momentum are found to satisfy the first law of black hole thermodynamics.
Elliptic Genera and 3d Gravity
Benjamin, Nathan; Kachru, Shamit; Moore, Gregory W; Paquette, Natalie M
2015-01-01T23:59:59.000Z
We describe general constraints on the elliptic genus of a 2d supersymmetric conformal field theory which has a gravity dual with large radius in Planck units. We give examples of theories which do and do not satisfy the bounds we derive, by describing the elliptic genera of symmetric product orbifolds of $K3$, product manifolds, certain simple families of Calabi-Yau hypersurfaces, and symmetric products of the "Monster CFT." We discuss the distinction between theories with supergravity duals and those whose duals have strings at the scale set by the AdS curvature. Under natural assumptions we attempt to quantify the fraction of (2,2) supersymmetric conformal theories which admit a weakly curved gravity description, at large central charge.
Minimal Massive 3D Gravity Unitarity Redux
Arvanitakis, Alex S.; Townsend, Paul K.
2015-01-01T23:59:59.000Z
be written as the integral of a Lagrangian 3-form constructed from three Lorentz-vector one-forms: the dreibein e, the (dual) Lorentz connection ? and a Lagrange multipler field h imposing a zero-torsion constraint [6, 7]. Using a 3D vector algebra notation... for Lorentz vectors we can write this Lagrangian 3-form as LTMG[e, ?, h] = ??e ·R + 1 6 ?0 e · e× e+ h · T + 1 µ LLCS(?) , (2.1) where T and R are the torsion and curvature 2-forms, respectively, and LLCS is the Lorentz-Chern-Simons (LCS) 3-form for ?...
Image Appraisal for 2D and 3D Electromagnetic Inversion
Alumbaugh, D.L.; Newman, G.A.
1999-01-28T23:59:59.000Z
Linearized methods are presented for appraising image resolution and parameter accuracy in images generated with two and three dimensional non-linear electromagnetic inversion schemes. When direct matrix inversion is employed, the model resolution and posterior model covariance matrices can be directly calculated. A method to examine how the horizontal and vertical resolution varies spatially within the electromagnetic property image is developed by examining the columns of the model resolution matrix. Plotting the square root of the diagonal of the model covariance matrix yields an estimate of how errors in the inversion process such as data noise and incorrect a priori assumptions about the imaged model map into parameter error. This type of image is shown to be useful in analyzing spatial variations in the image sensitivity to the data. A method is analyzed for statistically estimating the model covariance matrix when the conjugate gradient method is employed rather than a direct inversion technique (for example in 3D inversion). A method for calculating individual columns of the model resolution matrix using the conjugate gradient method is also developed. Examples of the image analysis techniques are provided on 2D and 3D synthetic cross well EM data sets, as well as a field data set collected at the Lost Hills Oil Field in Central California.
Bergshoeff, Eric A.; Hohm, Olaf [Centre for Theoretical Physics, University of Groningen, Nijenborgh 4, 9747 AG Groningen (Netherlands); Townsend, Paul K. [Department of Applied Mathematics and Theoretical Physics, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge, CB3 0WA (United Kingdom)
2009-06-15T23:59:59.000Z
We explore the space of static solutions of the recently discovered three-dimensional 'new massive gravity' (NMG), allowing for either sign of the Einstein-Hilbert term and a cosmological term parametrized by a dimensionless constant {lambda}. For {lambda}=-1 we find black hole solutions asymptotic (but not isometric) to the unique (anti) de Sitter [(A)dS] vacuum, including extremal black holes that interpolate between this vacuum and (A)dS{sub 2}xS{sup 1}. We also investigate unitarity of linearized NMG in (A)dS vacua. We find unitary theories for some dS vacua, but (bulk) unitarity in AdS implies negative central charge of the dual conformal field theories (CFT), except for {lambda}=3 where the central charge vanishes and the bulk gravitons are replaced by 'massive photons'. A similar phenomenon is found in the massless limit of NMG, for which the linearized equations become equivalent to Maxwell's equations.
3D Quantum Gravity and Effective Noncommutative Quantum Field Theory
Freidel, Laurent; Livine, Etera R. [Perimeter Institute, 31 Caroline Street, North Waterloo, Ontario N2L 2Y5, Canada, and Laboratoire de Physique, ENS Lyon, CNRS UMR 5672, 46 Allee d'Italie, 69364 Lyon Cedex 07 (France)
2006-06-09T23:59:59.000Z
We show that the effective dynamics of matter fields coupled to 3D quantum gravity is described after integration over the gravitational degrees of freedom by a braided noncommutative quantum field theory symmetric under a {kappa} deformation of the Poincare group.
Electric field in 3D gravity with torsion
M. Blagojevi?; B. Cvetkovi?
2008-09-01T23:59:59.000Z
It is shown that in static and spherically symmetric configurations of the system of Maxwell field coupled to 3D gravity with torsion, at least one of the Maxwell field components has to vanish. Restricting our attention to the electric sector of the theory, we find an interesting exact solution, corresponding to the azimuthal electric field. Its geometric structure is to a large extent influenced by the values of two different central charges, associated to the asymptotic AdS structure of spacetime.
Electric field in 3D gravity with torsion
Blagojevic, M.; Cvetkovic, B. [Institute of Physics, P.O. Box 57, 11001 Belgrade (Serbia)
2008-08-15T23:59:59.000Z
It is shown that in static and spherically symmetric configurations of the system of Maxwell field coupled to 3D gravity with torsion, at least one of the Maxwell field components has to vanish. Restricting our attention to the electric sector of the theory, we find an interesting exact solution, corresponding to the azimuthal electric field. Its geometric structure is to a large extent influenced by the values of two different central charges, associated to the asymptotic AdS structure of spacetime.
S-duality in 3D gravity with torsion
Mielke, Eckehard W. [Departamento de Fisica, Universidad Autonoma Metropolitana-Iztapalapa, P.O. Box 55-534, 09340 Mexico D.F. (Mexico)]. E-mail: ekke@xanum.uam.mx; Maggiolo, Ali A. Rincon [Departamento de Fisica, Universidad Autonoma Metropolitana-Iztapalapa, P.O. Box 55-534, 09340 Mexico D.F. (Mexico)
2007-02-15T23:59:59.000Z
The deformation of the connection in three spacetime dimensions by the kinematically equivalent coframe is shown to induce a duality between the (Lorentz-) rotational and translational field momenta, for which the coupling to the deformation parameter is inverted. This new kind of strong/weak duality, pertinent to 3D, is instrumental for studying exact solutions of the 3D Poincare gauge field equations and the particle content of propagating modes on a background of constant curvature. For a topological Chern-Simons model of gravity, the propagating modes 'living' on an Anti-de Sitter (AdS) background correspond to real massive particles. Yang-Mills type generalizations and new cubic Lagrangians are found and completely classified in 3D. AdS or black hole type solutions with constant axial torsion emerge, also for these higher-order Lagrangians with new 'exotic' torsion-curvature couplings. Their pattern complies with our S-duality, with new repercussions for the field redefinition of the metric in 3D quantum gravity and the cosmological constant problem.
Solution accelerators for large scale 3D electromagnetic inverse problems
Newman, Gregory A.; Boggs, Paul T.
2004-04-05T23:59:59.000Z
We provide a framework for preconditioning nonlinear 3D electromagnetic inverse scattering problems using nonlinear conjugate gradient (NLCG) and limited memory (LM) quasi-Newton methods. Key to our approach is the use of an approximate adjoint method that allows for an economical approximation of the Hessian that is updated at each inversion iteration. Using this approximate Hessian as a preconditoner, we show that the preconditioned NLCG iteration converges significantly faster than the non-preconditioned iteration, as well as converging to a data misfit level below that observed for the non-preconditioned method. Similar conclusions are also observed for the LM iteration; preconditioned with the approximate Hessian, the LM iteration converges faster than the non-preconditioned version. At this time, however, we see little difference between the convergence performance of the preconditioned LM scheme and the preconditioned NLCG scheme. A possible reason for this outcome is the behavior of the line search within the LM iteration. It was anticipated that, near convergence, a step size of one would be approached, but what was observed, instead, were step lengths that were nowhere near one. We provide some insights into the reasons for this behavior and suggest further research that may improve the performance of the LM methods.
3-D Inversion Of Borehole-To-Surface Electrical Data Using A...
Neural Network Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: 3-D Inversion Of Borehole-To-Surface Electrical Data Using A...
, and wavelets Kristofer Davis and Yaoguo Li, Center for Gravity, Electrical, and Magnetics, Colorado School transforms on a re-ordered parameter set. The adaptive mesh discretizes the model region by starting transforms by storing only significant coefficients of those functions. This not only increases the speed
3D gravity with dust: classical and quantum theory
Viqar Husain; Jonathan Ziprick
2015-06-02T23:59:59.000Z
We study the Einstein gravity and dust system in three spacetime dimensions as an example of a non-perturbative quantum gravity model with local degrees of freedom. We derive the Hamiltonian theory in the dust time gauge and show that it has a rich class of exact solutions. These include the Ba\\~nados-Teitelboim-Zanelli black hole, static solutions with naked singularities and travelling wave solutions with dynamical horizons. We give a complete quantization of the wave sector of the theory, including a definition of a self-adjoint spacetime metric operator. This operator is used to demonstrate the quantization of deficit angle and the fluctuation of dynamical horizons.
Group field theory formulation of 3d quantum gravity coupled to matter fields
Daniele Oriti; James Ryan
2006-02-02T23:59:59.000Z
We present a new group field theory describing 3d Riemannian quantum gravity coupled to matter fields for any choice of spin and mass. The perturbative expansion of the partition function produces fat graphs colored with SU(2) algebraic data, from which one can reconstruct at once a 3-dimensional simplicial complex representing spacetime and its geometry, like in the Ponzano-Regge formulation of pure 3d quantum gravity, and the Feynman graphs for the matter fields. The model then assigns quantum amplitudes to these fat graphs given by spin foam models for gravity coupled to interacting massive spinning point particles, whose properties we discuss.
Nonlinear electrodynamics in 3D gravity with torsion
Blagojevic, M.; Cvetkovic, B.; Miskovic, O. [Institute of Physics, University of Belgrade, P. O. Box 57, 11001 Belgrade (Serbia); Instituto de Fisica, Pontificia Universidad Catolica de Valparaiso, Casilla 4059, Valparaiso (Chile)
2009-07-15T23:59:59.000Z
We study exact solutions of nonlinear electrodynamics coupled to three-dimensional gravity with torsion. We show that in any static and spherically symmetric configuration, at least one component of the electromagnetic field has to vanish. In the electric sector of the theory, we construct an exact solution, characterized by the azimuthal electric field. When the electromagnetic action is modified by a topological mass term, we find two types of the self-dual solutions.
Wavelet based inversion of gravity data Fabio Boschetti
Boschetti, Fabio
1 Wavelet based inversion of gravity data Fabio Boschetti CSIRO Exploration & Mining and Australian Running Heading: Wavelet based inversion of gravity data #12;2 ABSTRACT The Green's function of the Poisson equation, and its spatial derivatives, lead to a family of wavelets specifically tailored
Moho topography beneath the Corinth Rift area (Greece) from inversion of gravity data
Demouchy, Sylvie
Moho topography beneath the Corinth Rift area (Greece) from inversion of gravity data C. Tiberi,1 to Miocene lithospheric instabilities. Key words: boudinage, continental rifts, gravity inversion, Greece
Self-dual Maxwell field in 3D gravity with torsion
M. Blagojevi?; B. Cvetkovi?
2008-09-03T23:59:59.000Z
We study the system of self-dual Maxwell field coupled to 3D gravity with torsion, with Maxwell field modified by a topological mass term. General structure of the field equations reveals a new, dynamical role of the classical central charges, and gives a simple correspondence between self-dual solutions with torsion and their Riemannian counterparts. We construct two exact self-dual solutions, corresponding to the sectors with massless and massive Maxwell field, and calculate their conserved charges.
Stability of the numerical method of solving the 3D inverse scattering problem with fixed- energy Collections Journals About Contact us My IOPscience #12;Inverse Problems 6 (1990) L7-LI2. Printed in the UK with fixed-energy data A G Ramm Mathematics Department, Kansas State University, Manhattan, KS 66506, USA
Wang, Liqiang
Rapid 3D Seismic Source Inversion Using Windows Azure and Amazon EC2 Vedaprakash Subramanian seismic source inversion on both cluster (specif- ically, MPI-based) and cloud computing (specifically to seismic source in- version is feasible and has its advantages. In addition, we notice that both cluster
Full waveform inversion of a 3-D source inside an artificial rock
To, A C; Glaser, Steven D
2005-01-01T23:59:59.000Z
of a 3-D Source Inside an Artificial Rock Albert C. To andof a 3-D source inside an artificial rock plate inof a 3-D source inside an artificial rock plate is
Self-dual Maxwell field in 3D gravity with torsion
Blagojevic, M.; Cvetkovic, B. [Institute of Physics, P.O. Box 57, 11001 Belgrade (Serbia)
2008-08-15T23:59:59.000Z
We study the system of a self-dual Maxwell field coupled to 3D gravity with torsion, with the Maxwell field modified by a topological mass term. General structure of the field equations reveals a new, dynamical role of the classical central charges, and gives a simple correspondence between self-dual solutions with torsion and their Riemannian counterparts. We construct two exact self-dual solutions, corresponding to the sectors with a massless and massive Maxwell field, and calculate their conserved charges.
Zero gravity two-phase flow regime transition modeling compared with data and relap5-3d predictions
Ghrist, Melissa Renee
2009-05-15T23:59:59.000Z
This thesis compares air/water two-phase flow regime transition models in zero gravity with data and makes recommendations for zero gravity models to incorporate into the RELAP5-3D thermal hydraulic computer code. Data from numerous researchers...
Three-dimensional geologic structures from inversion of gravity anomalies
Hinson, Charles Alvin
1976-01-01T23:59:59.000Z
. Parameters used were: Zo=7 km, R=l gm/cm , fr=0. 09 km-', fz=0. 125 km iterations=6 and final rms difference was 7. 6 10-4 km. . 42 12 Inversion Model 1. Parameters used were p = 0. 1 gm/cms, zo = 5. 4 km, f& = 0. 045 and fz = 0. 095. Contours... are in kilometers relative to sea level 56 13 Inversion Model 2. Parameters used were p = 0. 1 gm/cm zo = 5. 4 km, fq = 0. 001 and fz = 0. 002. Contours are in kilometers relative to sea level 58 14 Gravity difference between the anomaly produced by Inversion...
Paris-Sud XI, Université de
A 3D biomechanical vocal tract model to study speech production control: How to take into account is determined by an optimal planning that selects the target motor control variables ensuring that the desired motor control can deal with gravity to achieve steady-state tongue positions. It is based on simulations
DIRECT AND INVERSE MEDIUM SCATTERING IN A 3D HOMOGENEOUS PLANAR WAVEGUIDE
Boyer, Edmond
GINTIDES, AND ARMIN LECHLEITER Abstract. Time-harmonic acoustic waves in an ocean of finite height of bounded penetrable scatterers. More important, we propose the Factorization method for solving inverse for the propagation of time-harmonic acoustic waves in the ocean [1,7,27,29]. In this model, waves traveling inside
Renyi Entropies, the Analytic Bootstrap, and 3D Quantum Gravity at Higher Genus
Headrick, Matthew; Perlmutter, Eric; Zadeh, Ida G
2015-01-01T23:59:59.000Z
We compute the contribution of the vacuum Virasoro representation to the genus-two partition function of an arbitrary CFT with central charge $c>1$. This is the perturbative pure gravity partition function in three dimensions. We employ a sewing construction, in which the partition function is expressed as a sum of sphere four-point functions of Virasoro vacuum descendants. For this purpose, we develop techniques to efficiently compute correlation functions of holomorphic operators, which by crossing symmetry are determined exactly by a finite number of OPE coefficients; this is an analytic implementation of the conformal bootstrap. Expanding the results in $1/c$, corresponding to the semiclassical bulk gravity expansion, we find that---unlike at genus one---the result does not truncate at finite loop order. Our results also allow us to extend earlier work on multiple-interval Renyi entropies and on the partition function in the separating degeneration limit.
Renyi Entropies, the Analytic Bootstrap, and 3D Quantum Gravity at Higher Genus
Matthew Headrick; Alexander Maloney; Eric Perlmutter; Ida G. Zadeh
2015-03-24T23:59:59.000Z
We compute the contribution of the vacuum Virasoro representation to the genus-two partition function of an arbitrary CFT with central charge $c>1$. This is the perturbative pure gravity partition function in three dimensions. We employ a sewing construction, in which the partition function is expressed as a sum of sphere four-point functions of Virasoro vacuum descendants. For this purpose, we develop techniques to efficiently compute correlation functions of holomorphic operators, which by crossing symmetry are determined exactly by a finite number of OPE coefficients; this is an analytic implementation of the conformal bootstrap. Expanding the results in $1/c$, corresponding to the semiclassical bulk gravity expansion, we find that---unlike at genus one---the result does not truncate at finite loop order. Our results also allow us to extend earlier work on multiple-interval Renyi entropies and on the partition function in the separating degeneration limit.
Oldenburg, Douglas W.
this problem we design a methodology for inverting magnetic data for subsurface magnetization, as opposed to magnetic susceptibility. Our approach contains flexibility to obtain different types of magnetization3D magnetic inversion for total magnetization in areas with complicated remanence Peter G. Leli
3d Spinfoam Quantum Gravity: Matter as a Phase of the Group Field Theory
Winston Fairbairn; Etera R. Livine
2007-02-23T23:59:59.000Z
An effective field theory for matter coupled to three-dimensional quantum gravity was recently derived in the context of spinfoam models in hep-th/0512113. In this paper, we show how this relates to group field theories and generalized matrix models. In the first part, we realize that the effective field theory can be recasted as a matrix model where couplings between matrices of different sizes can occur. In a second part, we provide a family of classical solutions to the three-dimensional group field theory. By studying perturbations around these solutions, we generate the dynamics of the effective field theory. We identify a particular case which leads to the action of hep-th/0512113 for a massive field living in a flat non-commutative space-time. The most general solutions lead to field theories with non-linear redefinitions of the momentum which we propose to interpret as living on curved space-times. We conclude by discussing the possible extension to four-dimensional spinfoam models.
Xie, G.; Li, J. [Lawrence Berkeley National Lab., CA (United States). Earth Sciences Div.
1997-05-01T23:59:59.000Z
A new 3D electromagnetic modeling and nonlinear inversion algorithm is presented based on global integral and local differential equations decomposition (GILD). The GILD parallel nonlinear inversion algorithm consists of five parts: (1) the domain is decomposed into subdomain SI and subdomain SII; (2) a new global magnetic integral equation in SI and the local magnetic differential equations IN SII will be used together to obtain the magnetic field in the modeling step; (3) the new global magnetic integral Jacobian equation in SI and the local magnetic differential Jacobian equations in SII will be used together to update the electric conductivity and permittivity from the magnetic field data in the inversion step; (4) the subdomain SII can naturally and uniformly be decomposed into 2{sup n} smaller sub-cubic-domains; the sparse matrix in each sub-cubic-domain can be eliminated separately, in parallel; (5) a new parallel multiple hierarchy substructure algorithm will be used to solve the smaller full matrices in SI, in parallel. The applications of the new 3D parallel GILD EM modeling and nonlinear inversion algorithm and software are: (1) to create high resolution controlled-source electric conductivity and permittivity imaging for interpreting electromagnetic field data acquired from cross hole, surface to borehole, surface to surface, single hole, and multiple holes; (2) to create the magnetotelluric high resolution imaging from the surface impedance and field data. The new GILD parallel nonlinear inversion will be a 3D/2.5D powerful imaging tool for the oil geophysical exploration and environmental remediation and monitoring.
Boyer, Edmond
1 Gravity inversion, AMS and geochronological investigations of syntectonic granitic plutons gravity inversion does not show any evidence of rooting of the granites along the SHF. Therefore, despite tectonic framework rather than local faulting as a factor controlling pluton emplacement. Keywords: granite
Three-dimensional gravity modeling and focusing inversion using rectangular meshes.
Commer, M.
2011-03-01T23:59:59.000Z
Rectangular grid cells are commonly used for the geophysical modeling of gravity anomalies, owing to their flexibility in constructing complex models. The straightforward handling of cubic cells in gravity inversion algorithms allows for a flexible imposition of model regularization constraints, which are generally essential in the inversion of static potential field data. The first part of this paper provides a review of commonly used expressions for calculating the gravity of a right polygonal prism, both for gravity and gradiometry, where the formulas of Plouff and Forsberg are adapted. The formulas can be cast into general forms practical for implementation. In the second part, a weighting scheme for resolution enhancement at depth is presented. Modelling the earth using highly digitized meshes, depth weighting schemes are typically applied to the model objective functional, subject to minimizing the data misfit. The scheme proposed here involves a non-linear conjugate gradient inversion scheme with a weighting function applied to the non-linear conjugate gradient scheme's gradient vector of the objective functional. The low depth resolution due to the quick decay of the gravity kernel functions is counteracted by suppressing the search directions in the parameter space that would lead to near-surface concentrations of gravity anomalies. Further, a density parameter transformation function enabling the imposition of lower and upper bounding constraints is employed. Using synthetic data from models of varying complexity and a field data set, it is demonstrated that, given an adequate depth weighting function, the gravity inversion in the transform space can recover geologically meaningful models requiring a minimum of prior information and user interaction.
Torres-Verdín, Carlos
in this paper is also suitable for the quantitative interpretation of 4D seismic data. Simulation and InversionJoint Inversion of Reservoir Production Measurements and 3D Pre-Stack Seismic Data: Proof-stack seismic data and fluid production history. The production measurements and the seismic data
seismic sur- veys. Results hint that the true value of time-lapse gravity as an additional tool and ongoing sensor technologies, combined with advances in computing power and robust inversion, can extract successful measure of fluid movement with time-lapse gravity experiments, although poorly documented
Thomas G. Hildenbrand; Geoffrey A. Phelps; Edward A. Mankinen
2006-09-21T23:59:59.000Z
A three-dimensional inversion of gravity data from the Rainier Mesa area and surrounding regions reveals a topographically complex pre-Cenozoic basement surface. This model of the depth to pre-Cenozoic basement rocks is intended for use in a 3D hydrogeologic model being constructed for the Rainier Mesa area. Prior to this study, our knowledge of the depth to pre-Cenozoic basement rocks was based on a regional model, applicable to general studies of the greater Nevada Test Site area but inappropriate for higher resolution modeling of ground-water flow across the Rainier Mesa area. The new model incorporates several changes that lead to significant improvements over the previous regional view. First, the addition of constraining wells, encountering old volcanic rocks lying above but near pre-Cenozoic basement, prevents modeled basement from being too shallow. Second, an extensive literature and well data search has led to an increased understanding of the change of rock density with depth in the vicinity of Rainier Mesa. The third, and most important change, relates to the application of several depth-density relationships in the study area instead of a single generalized relationship, thereby improving the overall model fit. In general, the pre-Cenozoic basement surface deepens in the western part of the study area, delineating collapses within the Silent Canyon and Timber Mountain caldera complexes, and shallows in the east in the Eleana Range and Yucca Flat regions, where basement crops out. In the Rainier Mesa study area, basement is generally shallow (< 1 km). The new model identifies previously unrecognized structures within the pre-Cenozoic basement that may influence ground-water flow, such as a shallow basement ridge related to an inferred fault extending northward from Rainier Mesa into Kawich Valley.
Stryk, Oskar von
Login Register Home Videos Jobs Games 3D Printing Electronics Design Software Designer Edge for 3D Printing · -- B6 Sigma Labs (ticker SGLB) is not the same company as Sigma Technologies
Energy Science and Technology Software Center (OSTI)
003029WKSTN00 Delineation of nuclear structures in 3D multicellular systems https://vision.lbl.gov/Software/3DMorphometry/
Energy Science and Technology Software Center (OSTI)
003188MLTPL00 F3D Image Processing and Analysis for Many - and Multi-core Platforms http://camera.lbl.gov/software
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08:59 ALS researchers have discovered a material that is essentially a 3D version of graphene-the 2D sheets of carbon through which electrons race at many times the speed at which...
and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Department of Geophysics, Colorado School of geophysical data has been widely uti- lized in data interpretation in both hydrocarbon and mineral exploration
Unstructured grid modelling to create 3-D Earth models that unify geological and geophysical
Farquharson, Colin G.
Unstructured grid modelling to create 3-D Earth models that unify geological and geophysical Conclusion The common Earth model Geophysical inversion Geological and geophysical models Instructured meshes Geophysical inversion Geological and geophysical models Instructured meshes Motivation: The common Earth model
Nguyen, Vu Giang
1996-01-01T23:59:59.000Z
3-D gravity inversion and rift stretching models are used in the Song Hong basin to determine the general configuration of the upper mantle and the mechanism for its formation in the region. The basin approximately 200 km wide by 600 km in length...
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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC) Environmental AssessmentsGeoffrey(SC) GettingGitGraduateGrantsGraphene's 3D
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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.NewofGeothermal Heat Annual Report, 1993SemiconductorGraphene's 3D
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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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.NewofGeothermal Heat Annual Report,Graphene's 3D Counterpart Print
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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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.NewofGeothermal Heat Annual Report,Graphene's 3D Counterpart
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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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.NewofGeothermal Heat Annual Report,Graphene's 3D
Sample measurement Choose 3D, for 3D scan
Nizkorodov, Sergey
Sample measurement M Choose 3D, for 3D scan -> load method ("3D_EEM.xml") -> Run Signal: save S1/R1 column names etc once saved, close all plots before taking next sample Processing via Matlab script "EEM
Papadopouli, Maria
2012 Idea Generation 3D printing at nanoscale Cruising on electrical roads Pushing back against Centre micro and nanoscale 15 Taking 3D printing to the nanoscale 18 Fighting cancer with a "lab
Barrash, Warren
Hydraulic conductivity imaging from 3-D transient hydraulic tomography at several pumping August 2013; accepted 7 September 2013; published 13 November 2013. [1] 3-D Hydraulic tomography (3-D HT (primarily hydraulic conductivity, K) is estimated by joint inversion of head change data from multiple
One Loop Beta Functions in Topologically Massive Gravity
R. Percacci; E. Sezgin
2010-02-15T23:59:59.000Z
We calculate the running of the three coupling constants in cosmological, topologically massive 3d gravity. We find that \
Jiajia Sun and Yaoguo Li, Center for Gravity, Electrical and Magnetic Studies, Colorado School of Mines
None
2013-10-30T23:59:59.000Z
This video provides an overview of the Sandia National Laboratories developed 3-D World Model Building capability that provides users with an immersive, texture rich 3-D model of their environment in minutes using a laptop and color and depth camera.
None
2014-02-26T23:59:59.000Z
This video provides an overview of the Sandia National Laboratories developed 3-D World Model Building capability that provides users with an immersive, texture rich 3-D model of their environment in minutes using a laptop and color and depth camera.
Ercius, Peter
2014-06-27T23:59:59.000Z
Berkeley Lab's Peter Ercius discusses "Imaging atoms in 3-D" in this Oct. 28, 2013 talk, which is part of a Science at the Theater event entitled Eight Big Ideas
Ercius, Peter
2013-10-31T23:59:59.000Z
Berkeley Lab's Peter Ercius discusses "Imaging atoms in 3-D" in this Oct. 28, 2013 talk, which is part of a Science at the Theater event entitled Eight Big Ideas
Rich, D.O.; Pope, S.C.; DeLapp, J.G.
1994-10-01T23:59:59.000Z
In April, a 128 PE Cray T3D was installed at Los Alamos National Laboratory`s Advanced Computing Laboratory as part of the DOE`s High-Performance Parallel Processor Program (H4P). In conjunction with CRI, the authors implemented a 30 day acceptance test. The test was constructed in part to help them understand the strengths and weaknesses of the T3D. In this paper, they briefly describe the H4P and its goals. They discuss the design and implementation of the T3D acceptance test and detail issues that arose during the test. They conclude with a set of system requirements that must be addressed as the T3D system evolves.
TOPAZ3D. 3-D Finite Element Heat Transfer
Shapiro, A.B. [Lawrence Livermore National Lab., CA (United States)
1992-02-24T23:59:59.000Z
TOPAZ3D is a three-dimensional implicit finite element computer code for heat transfer analysis. TOPAZ3D can be used to solve for the steady-state or transient temperature field on three-dimensional geometries. Material properties may be temperature-dependent and either isotropic or orthotropic. A variety of time-dependent and temperature-dependent boundary conditions can be specified including temperature, flux, convection, and radiation. By implementing the user subroutine feature, users can model chemical reaction kinetics and allow for any type of functional representation of boundary conditions and internal heat generation. TOPAZ3D can solve problems of diffuse and specular band radiation in an enclosure coupled with conduction in the material surrounding the enclosure. Additional features include thermal contact resistance across an interface, bulk fluids, phase change, and energy balances.
3D reconstruction of tensors and vectors
Defrise, Michel; Gullberg, Grant T.
2005-02-17T23:59:59.000Z
Here we have developed formulations for the reconstruction of 3D tensor fields from planar (Radon) and line-integral (X-ray) projections of 3D vector and tensor fields. Much of the motivation for this work is the potential application of MRI to perform diffusion tensor tomography. The goal is to develop a theory for the reconstruction of both Radon planar and X-ray or line-integral projections because of the flexibility of MRI to obtain both of these type of projections in 3D. The development presented here for the linear tensor tomography problem provides insight into the structure of the nonlinear MRI diffusion tensor inverse problem. A particular application of tensor imaging in MRI is the potential application of cardiac diffusion tensor tomography for determining in vivo cardiac fiber structure. One difficulty in the cardiac application is the motion of the heart. This presents a need for developing future theory for tensor tomography in a motion field. This means developing a better understanding of the MRI signal for diffusion processes in a deforming media. The techniques developed may allow the application of MRI tensor tomography for the study of structure of fiber tracts in the brain, atherosclerotic plaque, and spine in addition to fiber structure in the heart. However, the relations presented are also applicable to other fields in medical imaging such as diffraction tomography using ultrasound. The mathematics presented can also be extended to exponential Radon transform of tensor fields and to other geometric acquisitions such as cone beam tomography of tensor fields.
INTEGRATING DATA FROM 3D CAD AND 3D CAMERAS
Bosché, Frédéric
camera, 3D CAD, data fusion, construction automation 1 PhD Candidate, Department of Civil Engineering in Civil and Building Engineering Page 37 #12;INTRODUCTION Over the last fifty years, the construction2 , Carl T. Haas3 and Carlos H. Caldas4 ABSTRACT In a reversal of historic trends, the capital
Inversion of marine gravity data
Shih, Chung-Chi
1982-01-01T23:59:59.000Z
the topography is supported by lateral density variations P&(x, y) in the mantle. The resulting expression for Z(Rx, Ky) is Z(Kx, Ky) 2xGe " [(p-(o )+(P-P ) e "' ? P ? (o) e dwk6l j (6a) Hence F Kx, Ky) 1/(2KGe " [((oc-(w)+(lo -p ) e " ? p-(o e k(t+L/s..."H (8) where an asterisk denotes the complex conjugate; and the power spectra of g(x, y) and h(x, y), Eg and EM, were estimated from IA E G (Kx, Ky) =I/M E C, Ge s=1 M E M (Kx, Ky) 1/M E H, He (9) (10) An estimate of F(Kx, Ky) was then obtained...
Gary Christopher Vezzoli
2001-04-04T23:59:59.000Z
This work presents physical consequences of our theory of induced gravity (Ref.1) regarding: 1) the requirement to consider shape and materials properties when calculating graviton cross section collision area; 2) use of Special Relativity; 3) implications regarding the shape of cosmos; 4) comparison to explanations using General Relativity; 5) properties of black holes; 6) relationship to the strong force and the theorized Higgs boson; 7) the possible origin of magnetic attraction; 8) new measurements showing variation from gravitational inverse square behavior at length scales of 0.1 mm and relationship to the Cosmological constant, and proof of the statistical time properties of the gravitational interaction.
Characterization of 3D Photovoltaics
Characterization of 3D Photovoltaics SEMICONDUCTORS Our goal is to provide industry with test structures and models of next-generation photovoltaics, with an initial focus on cadmium telluride (Cd (nanostructured) photovoltaic devices. Objective Impact and Customers · The U.S. Photovoltaic Industry Roadmap
Wilson loops, geometric operators and fermions in 3d group field theory
R. J. Dowdall
2009-11-12T23:59:59.000Z
Group field theories whose Feynman diagrams describe 3d gravity with a varying configuration of Wilson loop observables and 3d gravity with volume observables at each vertex are defined. The volume observables are created by the usual spin network grasping operators which require the introduction of vector fields on the group. We then use this to define group field theories that give a previously defined spin foam model for fermion fields coupled to gravity, and the simpler quenched approximation, by using tensor fields on the group. The group field theory naturally includes the sum over fermionic loops at each order of the perturbation theory.
Interactive 3D Animation System for Web3D Masayuki Furukawa, Shinya Fukumoto, Hiroshi Kawasaki
Tokyo, University of
of state model using a printer as a 3D object. In the example, three states of 3D object are defined can try 3D manual of printer by using tablet PC to learn the effectiveness of our 3D animation systemInteractive 3D Animation System for Web3D Masayuki Furukawa, Shinya Fukumoto, Hiroshi Kawasaki
PRISACARIU, REID: PWP3D 1 PWP3D: Real-time segmentation and
Oxford, University of
method allows for fast 2D3D pose tracking and 2D segmentation using a single, unified, energy function in print or electronic forms. #12;2 PRISACARIU, REID: PWP3D The most closely related work to our ownPRISACARIU, REID: PWP3D 1 PWP3D: Real-time segmentation and tracking of 3D objects Victor A
Inverse Modeling for Coastal Seawater Intrusion
PolitĂ¨cnica de Catalunya, Universitat
, USA) #12;INTRODUCTION Â· Inverse modeling Â standard tool for groundwater modeling Â uncommonD3D.1 Â 2D and 3D finite-element code for simulating variable-density groundwater problems Â· UCODE 3 and given time (i.e. at one observation location) on one of the parameters in the groundwater model
High throughput 3-D tissue cytometry
Kwon, Hyuk-Sang, 1971-
2007-01-01T23:59:59.000Z
This thesis presents the ongoing technological development of high throughput 3-D tissue cytometry.and its applications in biomedicine. 3-D tissue cytometry has been developed in our laboratory based on two-photon microscopy ...
Part removal of 3D printed parts
Peńa Doll, Mateo
2014-01-01T23:59:59.000Z
An experimental study was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D printing using a patent ...
Cossairt, Oliver S. (Oliver Strider), 1978-
2003-01-01T23:59:59.000Z
This thesis outlines the various techniques for creating electronic 3D displays and analyzes their commercial potential. The thesis argues for the use of view-sequential techniques in the design of 3D displays based on ...
The Makerbot: Desktop 3D printing
Roughan, Matthew
The Makerbot: Desktop 3D printing Matthew Roughan School of Mathematical Sciences matthew is Lots of maths hidden in something like 3D printing Geometry and Linear algebra ++ Same math used
Application of magnetic amplitude inversion in exploration for natural gas in volcanics Yaoguo Li basins and have strong remanent magnetization. The appli- cation arises in exploration of natural gas identify the volcanic units at large depths. INTRODUCTION Exploration for natural gas hosted in volcanics
Dietz, Henry G. "Hank"
3D Printing Prof. Hank Dietz TCMS, March 14, 2014 University of Kentucky Electrical & Computer #12;3D With Glue Layers of paper: printed with glue & cut Layers of powder: printed with glue Can also be printed in full color #12;3D Extrusion (RepRaps) FDM: Fused Deposition Modeling FFF: Fused
INVERSE-SQUARE LAW TESTS 1 TESTS OF THE GRAVITATIONAL
Washington at Seattle, University of - Department of Physics, Electroweak Interaction Research Group
INVERSE-SQUARE LAW TESTS 1 TESTS OF THE GRAVITATIONAL INVERSE-SQUARE LAW E.G.Adelberger, B-1560 KEYWORDS: gravitation, experimental tests of inverse-square law, quantum gravity, extra dimensions ABSTRACT: We review recent experimental tests of the gravitational inverse-square law, and the wide variety
Printing 3D Models to the Genisys Xs 3D Printer By Sotiri Koyonos
Illinois at Urbana-Champaign, University of
Printing 3D Models to the Genisys Xs 3D Printer By Sotiri Koyonos VMIL Consultant 28 February 2003's Genisys Xs 3D printer. This document assumes that you have created a stereo lithography file (*.stl Abstract This document outlines the process for manufacturing three dimensional (3D) models on the ITG
3D Velocity from 3D Doppler Radial Velocity J. L. Barron,1
Barron, John
to compute local 3D velocity (local 3D optical flow). Radial velocity (measured by the Doppler effect3D Velocity from 3D Doppler Radial Velocity J. L. Barron,1 R. E. Mercer,1 X. Chen,1 P. Joe2 1 velocity data and qualitatively on real radial velocity data, obtained from the Doppler radar at Kurnell
Imaging the 3-D cosmological mass distribution with weak gravitational lensing
A. N. Taylor
2001-11-30T23:59:59.000Z
I show how weak gravitational lensing can be used to image the 3-D mass distribution in the Universe. An inverse relation to the lensing equation, relating the lensing potential evaluated at each source to the full 3-D Newtonian potential, is derived. I consider the normal modes of the lensing problem and clarify the equations using a small-angle approximation. Finally I consider the prospects of using this method to estimate the 3-D matter distribution from a realistic galaxy lensing survey.
3D and 4D magnetic susceptibility tomography based on complex MR images
Chen, Zikuan; Calhoun, Vince D
2014-11-11T23:59:59.000Z
Magnetic susceptibility is the physical property for T2*-weighted magnetic resonance imaging (T2*MRI). The invention relates to methods for reconstructing an internal distribution (3D map) of magnetic susceptibility values, .chi. (x,y,z), of an object, from 3D T2*MRI phase images, by using Computed Inverse Magnetic Resonance Imaging (CIMRI) tomography. The CIMRI technique solves the inverse problem of the 3D convolution by executing a 3D Total Variation (TV) regularized iterative convolution scheme, using a split Bregman iteration algorithm. The reconstruction of .chi. (x,y,z) can be designed for low-pass, band-pass, and high-pass features by using a convolution kernel that is modified from the standard dipole kernel. Multiple reconstructions can be implemented in parallel, and averaging the reconstructions can suppress noise. 4D dynamic magnetic susceptibility tomography can be implemented by reconstructing a 3D susceptibility volume from a 3D phase volume by performing 3D CIMRI magnetic susceptibility tomography at each snapshot time.
Wang, Ge
Gel'fand-Graev's Reconstruction Formula in the 3D Real Space -- A Framework towards a General-ye@uiowa.edu, hengyong-yu@ieee.org, ge-wang@ieee.org In [1-4], I. M. Gel'fand and M. I. Graev proposed inversion formulas for x-ray transforms in different spaces. In particular, Gel'fand-Graev's inversion formula [1
LITHOLOGY-FLUID INVERSION FROM PRESTACK SEISMIC DATA
Eidsvik, Jo
LITHOLOGY-FLUID INVERSION FROM PRESTACK SEISMIC DATA MARIT ULVMOEN Department of Mathematical of the study is on lithology-fluid inversion from prestack seismic data in a 3D reservoir. The inversion relates the lithology-fluid classes to elastic variables and the seismic data, and it follows the lines
Constraints on 3-D stress in the crust from support of mid-ocean ridge topography
Sandwell, David T.
with the cooling and subsidence of the oceanic lithosphere. The short-wavelength surface and Moho topographyConstraints on 3-D stress in the crust from support of mid-ocean ridge topography Karen Luttrell1 of these stresses may be constrained using seafloor topography and gravity. The topography is divided into a short
Advanced 3D Geophysical Imaging Technologies for Geothermal Resource...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
3D Geophysical Imaging Technologies for Geothermal Resource Characterization Advanced 3D Geophysical Imaging Technologies for Geothermal Resource Characterization Advanced 3D...
Hill, Wendell T.
IN THIS ISSUE 2 3D Printing in McKeldin 3 Saving WMUC Radio 4 You Did What?!? 7 Dance at UMD, in this issue. Our Terrapin Learning Commons is embracing all things digital, and the acquisition of a 3D printer allows any student the op- portunity to make their visions a reality. This little addition
3-D seismology in the Arabian Gulf
Al-Husseini, M. [Gulf PetroLink, Manama (Bahrain); Chimblo, R. [Saudi Aramco, Dhahran (Saudi Arabia)
1995-08-01T23:59:59.000Z
Since 1977 when Aramco and GSI (Geophysical Services International) pioneered the first 3-D seismic survey in the Arabian Gulf, under the guidance of Aramco`s Chief Geophysicist John Hoke, 3-D seismology has been effectively used to map many complex subsurface geological phenomena. By the mid-1990s extensive 3-D surveys were acquired in Abu Dhabi, Oman, Qatar and Saudi Arabia. Also in the mid-1990`s Bahrain, Kuwait and Dubai were preparing to record surveys over their fields. On the structural side 3-D has refined seismic maps, focused faults and fractures systems, as well as outlined the distribution of facies, porosity and fluid saturation. In field development, 3D has not only reduced drilling costs significantly, but has also improved the understanding of fluid behavior in the reservoir. In Oman, Petroleum Development Oman (PDO) has now acquired the first Gulf 4-D seismic survey (time-lapse 3D survey) over the Yibal Field. The 4-D survey will allow PDO to directly monitor water encroachment in the highly-faulted Cretaceous Shu`aiba reservoir. In exploration, 3-D seismology has resolved complex prospects with structural and stratigraphic complications and reduced the risk in the selection of drilling locations. The many case studies from Saudi Arabia, Oman, Qatar and the United Arab Emirates, which are reviewed in this paper, attest to the effectiveness of 3D seismology in exploration and producing, in clastics and carbonates reservoirs, and in the Mesozoic and Paleozoic.
3, 35433588, 2003 3-D air pollution
Boyer, Edmond
ACPD 3, 35433588, 2003 3-D air pollution modelling L. M. Frohn et al. Title Page Abstract hemispheric nested air pollution model L. M. Frohn, J. H. Christensen, J. Brandt, C. Geels, and K. M. Hansen 2003 Correspondence to: L. M. Frohn (lmf@dmu.dk) 3543 #12;ACPD 3, 35433588, 2003 3-D air pollution
3D Object Modelling via Registration
matching on the GPU. So with the increasing demand for cheap 3D scanners and the advances of computer power, Iterative Closest Point, real time preview. #12;#12;ResumĂ© Stereo vision har mange fordele frem for andre 3D
Fabrication of 3D Silicon Sensors
Kok, A.; Hansen, T.E.; Hansen, T.A.; Lietaer, N.; Summanwar, A.; /SINTEF, Oslo; Kenney, C.; Hasi, J.; /SLAC; Da Via, C.; /Manchester U.; Parker, S.I.; /Hawaii U.
2012-06-06T23:59:59.000Z
Silicon sensors with a three-dimensional (3-D) architecture, in which the n and p electrodes penetrate through the entire substrate, have many advantages over planar silicon sensors including radiation hardness, fast time response, active edge and dual readout capabilities. The fabrication of 3D sensors is however rather complex. In recent years, there have been worldwide activities on 3D fabrication. SINTEF in collaboration with Stanford Nanofabrication Facility have successfully fabricated the original (single sided double column type) 3D detectors in two prototype runs and the third run is now on-going. This paper reports the status of this fabrication work and the resulted yield. The work of other groups such as the development of double sided 3D detectors is also briefly reported.
BEAMS3D Neutral Beam Injection Model
Lazerson, Samuel
2014-04-14T23:59:59.000Z
With the advent of applied 3D fi elds in Tokamaks and modern high performance stellarators, a need has arisen to address non-axisymmetric effects on neutral beam heating and fueling. We report on the development of a fully 3D neutral beam injection (NBI) model, BEAMS3D, which addresses this need by coupling 3D equilibria to a guiding center code capable of modeling neutral and charged particle trajectories across the separatrix and into the plasma core. Ionization, neutralization, charge-exchange, viscous velocity reduction, and pitch angle scattering are modeled with the ADAS atomic physics database [1]. Benchmark calculations are presented to validate the collisionless particle orbits, neutral beam injection model, frictional drag, and pitch angle scattering effects. A calculation of neutral beam heating in the NCSX device is performed, highlighting the capability of the code to handle 3D magnetic fields.
Triana, Santiago Andrés; Pápics, Péter; Aerts, Conny; Kawaler, Steven D; Christensen-Dalsgaard, Jörgen
2015-01-01T23:59:59.000Z
The internal angular momentum distribution of a star is key to determine its evolution. Fortunately, the stellar internal rotation can be probed through studies of rotationally-split non-radial oscillation modes. In particular, detection of non-radial gravity modes (g modes) in massive young stars has become feasible recently thanks to the Kepler space mission. Our aim is to derive the internal rotation profile of the Kepler B8V star KIC 10526294 through asteroseismology. We interpret the observed rotational splittings of its dipole g modes using four different approaches based on the best seismic models of the star and their rotational kernels. We show that these kernels can resolve differential rotation the radiative envelope if a smooth rotational profile is assumed and the observational errors are small. Based on Kepler data, we find that the rotation rate near the core-envelope boundary is well constrained to $163\\pm89$ nHz. The seismic data are consistent with rigid rotation but a profile with counter-r...
Computer Modelling of 3D Geological Surface
Kodge, B G
2011-01-01T23:59:59.000Z
The geological surveying presently uses methods and tools for the computer modeling of 3D-structures of the geographical subsurface and geotechnical characterization as well as the application of geoinformation systems for management and analysis of spatial data, and their cartographic presentation. The objectives of this paper are to present a 3D geological surface model of Latur district in Maharashtra state of India. This study is undertaken through the several processes which are discussed in this paper to generate and visualize the automated 3D geological surface model of a projected area.
3-D Model for Deactivation & Decommissioning
Broader source: Energy.gov [DOE]
The design and production of 3-D scale models that replicate the highly contaminated structures within the nuclear facility would provide a significant improvement in visualization of the work...
3D Hardware Canaries Sebastien Briais4
surround the whole target and protect its content from physical attacks. 3D ICs are rel- atively hard reporting pre- liminary implementation results on silicon), we introduce a "hardware canary". The ca- nary
3D Spectroscopy and the Virtual Observatory
Bryan W. Miller
2007-08-15T23:59:59.000Z
Integral field, or 3D, spectroscopy is the technique of obtaining spectral information over a two-dimensional, hopefully contiguous, field of view. While there is some form of astronomical 3D spectroscopy at all wavelengths, there has been a rapid increase in interest in optical and near-infrared 3D spectroscopy. This has resulted in the deployment of a large variety of integral-field spectrographs on most of the large optical/infrared telescopes. The amount of IFU data available in observatory archives is large and growing rapidly. The complications of treating IFU data as both imaging and spectroscopy make it a special challenge for the virtual observatory. This article describes the various techniques of optical and near-infrared spectroscopy and some of the general needs and issues related to the handling of 3D data by the virtual observatory.
Energy Science and Technology Software Center (OSTI)
002440MLTPL00 3D Torus Routing Engine Module for OFA OpenSM v. 1.0 http://www.openfabrics.org/git?p=sashak/management.git;a=sum
Gravity, Dimension, Equilibrium, & Thermodynamics
Jerome Perez
2006-03-30T23:59:59.000Z
Is it actually possible to interpret gravitation as space's property in a pure classical way. Then, we note that extended self-gravitating system equilibrium depends directly on the number of dimension of the space in which it evolves. Given those precisions, we review the principal thermodynamical knowledge in the context of classical gravity with arbitrary dimension of space. Stability analyses for bounded 3D systems, namely the Antonov instability paradigm, are then rapproched to some amazing properties of globular clusters and galaxies.
Turner, D.
1983-08-01T23:59:59.000Z
The T-HEMP3D (Transportable HEMP3D) computer program is a derivative of the STEALTH three-dimensional thermodynamics code developed by Science Applications, Inc., under the direction of Ron Hofmann. STEALTH, in turn, is based entirely on the original HEMP3D code written at Lawrence Livermore National Laboratory. The primary advantage STEALTH has over its predecessors is that it was designed using modern structured design techniques, with rigorous programming standards enforced. This yields two benefits. First, the code is easily changeable; this is a necessity for a physics code used for research. The second benefit is that the code is easily transportable between different types of computers. The STEALTH program was transferred to LLNL under a cooperative development agreement. Changes were made primarily in three areas: material specification, coordinate generation, and the addition of sliding surface boundary conditions. The code was renamed T-HEMP3D to avoid confusion with other versions of STEALTH. This document summarizes the input to T-HEMP3D, as used at LLNL. It does not describe the physics simulated by the program, nor the numerical techniques employed. Furthermore, it does not describe the separate job steps of coordinate generation and post-processing, including graphical display of results. (WHK)
3D Self-Portraits Etienne Vouga2
O'Brien, James F.
scanning pose change output reconstruction textured reconstruction large variety of examples3D print Figure for applications such as online avatars or 3D printing (the miniature shown here was printed using a ZPrinter 650 and accurate cap- ture system for 3D self-portraits using a single 3D sensor. Figure 2: 3D printed miniatures
Simnple, portable, 3-D projection routine
Wagner, J.S.
1987-04-01T23:59:59.000Z
A 3-D projection routine is presented for use in computer graphics applications. The routine is simple enough to be considered portable, and easily modified for special problems. There is often the need to draw three-dimensional objects on a two-dimensional plotting surface. For the object to appear realistic, perspective effects must be included that allow near objects to appear larger than distant objects. Several 3-D projection routines are commercially available, but they are proprietary, not portable, and not easily changed by the user. Most are restricted to surfaces that are functions of two variables. This makes them unsuitable for viewing physical objects such as accelerator prototypes or propagating beams. This report develops a very simple algorithm for 3-D projections; the core routine is only 39 FORTRAN lines long. It can be easily modified for special problems. Software dependent calls are confined to simple drivers that can be exchanged when different plotting software packages are used.
Ames Lab 101: 3D Metals Printer
Ott, Ryan
2014-02-13T23:59:59.000Z
To meet one of the biggest energy challenges of the 21st century - finding alternatives to rare-earth elements and other critical materials - scientists will need new and advanced tools. The Critical Materials Institute at the U.S. Department of Energy's Ames Laboratory has a new one: a 3D printer for metals research. 3D printing technology, which has captured the imagination of both industry and consumers, enables ideas to move quickly from the initial design phase to final form using materials including polymers, ceramics, paper and even food. But the Critical Materials Institute (CMI) will apply the advantages of the 3D printing process in a unique way: for materials discovery.
3D Modeling Engine Representation Summary Report
Steven Prescott; Ramprasad Sampath; Curtis Smith; Timothy Yang
2014-09-01T23:59:59.000Z
Computers have been used for 3D modeling and simulation, but only recently have computational resources been able to give realistic results in a reasonable time frame for large complex models. This summary report addressed the methods, techniques, and resources used to develop a 3D modeling engine to represent risk analysis simulation for advanced small modular reactor structures and components. The simulations done for this evaluation were focused on external events, specifically tsunami floods, for a hypothetical nuclear power facility on a coastline.
Fourier transform of the 3d NS equations The 3d NS equations are
Salmon, Rick
1 Fourier transform of the 3d NS equations The 3d NS equations are (1) vi t + vj vi xj = - p xi easily add it in at the end. Our interest is in the advection and pressure terms. Introducing the Fourier transforms (2) vi x( ) = ui k( )eikx k p x( ) = p k( )eikx k we obtain the Fourier transform of (1
METRIC FOR AUTOMATED DETECTION AND IDENTIFICATION OF 3D CAD ELEMENTS IN 3D SCANNED
BoschĂ©, FrĂ©dĂ©ric
of 3D Computer-Aided Design (CAD) engines and more generally of Building Information Models on one side states is critical for performing efficient building and infrastructure construction, maintenance, and management. Three- dimensional (3D) laser scanners have the potential to be successfully applied
Energy Savings in 3-D | ornl.gov
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Energy savings in 3-D ORNL researchers show production, energy advantages of additive manufacturing ORNL 3-D printer in use. ORNL 3-D printer in use. Researchers at the Department...
3D engine for immersive virtual environments
Anderson, Christopher Dean
2005-02-17T23:59:59.000Z
The purpose of this project is to develop a software framework, a 3D engine, which will generate images to be projected onto facets of a spatially immersive display (SID). The goal is to develop a software library to support the creation of images...
3-D hydro + cascade model at RHIC
Chiho Nonaka; Steffen A. Bass
2005-11-07T23:59:59.000Z
We present a 3-D hydro + cascade model in which viscosity and a realistic freezeout process for the hadronic phase are taken into account. We compare our results to experimental data and discuss the finite state interaction effects on physical observables.
Song, Won Chan
2007-04-25T23:59:59.000Z
My thesis describes a tool which creates speed-lines automatically in 3D computer animations. Speed-lines are usually used in comic books to express fast motions in a still image. They are also used in 2D animations. ...
3-D Force-balanced Magnetospheric Configurations
Sorin Zaharia; C.Z. Cheng; K. Maezawa
2003-02-10T23:59:59.000Z
The knowledge of plasma pressure is essential for many physics applications in the magnetosphere, such as computing magnetospheric currents and deriving magnetosphere-ionosphere coupling. A thorough knowledge of the 3-D pressure distribution has however eluded the community, as most in-situ pressure observations are either in the ionosphere or the equatorial region of the magnetosphere. With the assumption of pressure isotropy there have been attempts to obtain the pressure at different locations by either (a) mapping observed data (e.g., in the ionosphere) along the field lines of an empirical magnetospheric field model or (b) computing a pressure profile in the equatorial plane (in 2-D) or along the Sun-Earth axis (in 1-D) that is in force balance with the magnetic stresses of an empirical model. However, the pressure distributions obtained through these methods are not in force balance with the empirical magnetic field at all locations. In order to find a global 3-D plasma pressure distribution in force balance with the magnetospheric magnetic field, we have developed the MAG-3D code, that solves the 3-D force balance equation J x B = (upside-down delta) P computationally. Our calculation is performed in a flux coordinate system in which the magnetic field is expressed in terms of Euler potentials as B = (upside-down delta) psi x (upside-down delta) alpha. The pressure distribution, P = P(psi,alpha), is prescribed in the equatorial plane and is based on satellite measurements. In addition, computational boundary conditions for y surfaces are imposed using empirical field models. Our results provide 3-D distributions of magnetic field and plasma pressure as well as parallel and transverse currents for both quiet-time and disturbed magnetospheric conditions.
acquisition facilitates 3d: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Physics Websites Summary: measurements and finally its instantiation through 3D printing, are presented. Laser scanner acquisition, reconstruction and 3D printing lend well...
automatic 3d fe: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Computer Technologies and Information Sciences Websites Summary: by means of the "3D printing" devices used in mechanical rapid prototyping. Another one is that 3D...
atomic resolution 3d: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
developed 3D video database of spontaneous facial Cohn, Jeffrey F. 16 Improvement of 3D Printing Resolution by the Development of Shrinkable Materials University of California...
angular resolution 3d: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
developed 3D video database of spontaneous facial Cohn, Jeffrey F. 18 Improvement of 3D Printing Resolution by the Development of Shrinkable Materials University of California...
3D Printing in 30 Seconds | Department of Energy
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
3D Printing in 30 Seconds 3D Printing in 30 Seconds Addthis An error occurred. Unable to execute Javascript. Duration :38 Topic Science & Technology...
Constrained Inverse Volume Rendering for Planetary Nebulae Marcus Magnor
Utah, University of
Inverse Volume Rendering I.4.m [Image Processing and Computer Vision]: Miscellaneous--Volumetric Modeling that we are observing 2D projections of 3D volumes of glowing gas, the actual spatial struc- ture of PNeConstrained Inverse Volume Rendering for Planetary Nebulae Marcus Magnor MPI Informatik, Germany
Lithology-Fluid Inversion based on Prestack Seismic Data
Eidsvik, Jo
Lithology-Fluid Inversion based on Prestack Seismic Data Marit Ulvmoen Summary The focus of the study is on lithology-fluid inversion from prestack seismic data. The target zone is a 3D reservoir model. The likelihood model relates the lithology-fluid classes to elastic variables and the seismic
3-D seismic velocity and attenuation structures in the geothermal field
Nugraha, Andri Dian [Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung, Jalan Ganesha No. 10 Bandung, 40132 (Indonesia)] [Global Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung, Jalan Ganesha No. 10 Bandung, 40132 (Indonesia); Syahputra, Ahmad [Geophyisical Engineering, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung, Jalan Ganesha No. 10 Bandung, 40132 (Indonesia)] [Geophyisical Engineering, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung, Jalan Ganesha No. 10 Bandung, 40132 (Indonesia); Fatkhan,; Sule, Rachmat [Applied Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung, Jalan Ganesha No. 10 Bandung, 40132 (Indonesia)] [Applied Geophysics Research Group, Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung, Jalan Ganesha No. 10 Bandung, 40132 (Indonesia)
2013-09-09T23:59:59.000Z
We conducted delay time tomography to determine 3-D seismic velocity structures (Vp, Vs, and Vp/Vs ratio) using micro-seismic events in the geothermal field. The P-and S-wave arrival times of these micro-seismic events have been used as input for the tomographic inversion. Our preliminary seismic velocity results show that the subsurface condition of geothermal field can be fairly delineated the characteristic of reservoir. We then extended our understanding of the subsurface physical properties through determining of attenuation structures (Qp, Qs, and Qs/Qp ratio) using micro-seismic waveform. We combined seismic velocities and attenuation structures to get much better interpretation of the reservoir characteristic. Our preliminary attanuation structures results show reservoir characterization can be more clearly by using the 3-D attenuation model of Qp, Qs, and Qs/Qp ratio combined with 3-D seismic velocity model of Vp, Vs, and Vp/Vs ratio.
Techniques for interactive 3-D scientific visualization
Glinert, E.P. (Rensselaer Polytechnic Inst., Troy, NY (USA). Dept. of Computer Science); Blattner, M.M. (Anderson (M.D.) Hospital and Tumor Inst., Houston, TX (USA). Dept. of Biomathematics California Univ., Davis, CA (USA). Dept. of Applied Science Lawrence Livermore National Lab., CA (USA)); Becker, B.G. (California Univ., Davis, CA (USA). Dept. of Applied Science Lawrence Livermore National La
1990-09-24T23:59:59.000Z
Interest in interactive 3-D graphics has exploded of late, fueled by (a) the allure of using scientific visualization to go where no-one has gone before'' and (b) by the development of new input devices which overcome some of the limitations imposed in the past by technology, yet which may be ill-suited to the kinds of interaction required by researchers active in scientific visualization. To resolve this tension, we propose a flat 5-D'' environment in which 2-D graphics are augmented by exploiting multiple human sensory modalities using cheap, conventional hardware readily available with personal computers and workstations. We discuss how interactions basic to 3-D scientific visualization, like searching a solution space and comparing two such spaces, are effectively carried out in our environment. Finally, we describe 3DMOVE, an experimental microworld we have implemented to test out some of our ideas. 40 refs., 4 figs.
3D Printing of Scintillating Materials
Y. Mishnayot; M. Layani; I. Cooperstein; S. Magdassi; G. Ron
2014-06-15T23:59:59.000Z
We demonstrate, for the first time, the applicability of 3D printing technique to the manufacture of scintillation detectors. We report of a formulation, usable in stereolithographic printing, that exhibits scintillation efficiency on the order of 30\\% of that of commercial polystyrene based scintillators. We discuss the applicability of these techniques and propose future enhancements that will allow tailoring the printed scintillation detectors to various application.
3D Printing of Scintillating Materials
Mishnayot, Y; Cooperstein, I; Magdassi, S; Ron, G
2014-01-01T23:59:59.000Z
We demonstrate, for the first time, the applicability of 3D printing technique to the manufacture of scintillation detectors. We report of a formulation, usable in stereolithographic printing, that exhibits scintillation efficiency on the order of 30\\% of that of commercial polystyrene based scintillators. We discuss the applicability of these techniques and propose future enhancements that will allow tailoring the printed scintillation detectors to various application.
Automatic 3D modeling of palatal plaster casts Marco Andreetto
Abu-Mostafa, Yaser S.
duplicated by 3D printers. A second application where 3D models of palatal casts could also be usefulAutomatic 3D modeling of palatal plaster casts Marco Andreetto Dept. of Information Engineer corte@dei.unipd.it Abstract This work introduces a procedure for automatic 3D model- ing and discusses
Scanning and Printing Persons in 3D Jurgen Sturm1
Cremers, Daniel
miniatures of persons using a Kinect sensor and a 3D color printer. To achieve this, we acquire color- through in rapid prototyping in recent years. Modern 3D printers are able to print colored 3D models at resolutions comparable to 2D paper printers. On the one hand, the creation of a detailed, printable 3D model
Engineering Workshop 3D Modeling Using TinkerCAD
Ohta, Shigemi
using TinkerCAD · TinkerCad is used for online 3D modeling · Learn how to print the clip on a 3D printer the hole and the clip #12;Congratulations! You made a 3D model! #12;Now To Print It... Our Printers · MakerEngineering Workshop 3D Modeling Using TinkerCAD Sci-Ed Day 2014 Brookhaven National Laboratory
CAN 3D PRINTING REVOLUTIONIZE GLOBAL MANUFACTURING? A DELPHI STUDY
CAN 3D PRINTING REVOLUTIONIZE GLOBAL MANUFACTURING? A DELPHI STUDY Master Thesis Proposal BACKGROUND 3D printing (or additive manufacturing) is not an entirely new phenomenon. First introduced and president of Foxconn, calls it a nice "gimmick" and even Nick Allen, founder of 3D printing company 3D Print
3D Printing of Functional and Biological Materials
! 3D Printing of Functional and Biological Materials Jennifer A. Lewis Wyss Professor)! Multimaterial 3D printing ! #12;3D antennas! Li ion microbatteries! Lightweight microlattices!Flexible sensors! 3D Printing of Integrated Electronic Devices ! #12;20 nm average , 5 50 nm
George Mesina; Joshua Hykes
2005-09-01T23:59:59.000Z
The RELAP5-3D source code is unstructured with many interwoven logic flow paths. By restructuring the code, it becomes easier to read and understand, which reduces the time and money required for code development, debugging, and maintenance. A structured program is comprised of blocks of code with one entry and exit point and downward logic flow. IF tests and DO loops inherently create structured code, while GOTO statements are the main cause of unstructured code. FOR_STRUCT is a commercial software package that converts unstructured FORTRAN into structured programming; it was used to restructure individual subroutines. Primarily it transforms GOTO statements, ARITHMETIC IF statements, and COMPUTED GOTO statements into IF-ELSEIF-ELSE tests and DO loops. The complexity of RELAP5-3D complicated the task. First, FOR_STRUCT cannot completely restructure all the complex coding contained in RELAP5-3D. An iterative approach of multiple FOR_STRUCT applications gave some additional improvements. Second, FOR_STRUCT cannot restructure FORTRAN 90 coding, and RELAP5-3D is partially written in FORTRAN 90. Unix scripts for pre-processing subroutines into coding that FOR_STRUCT could handle and post-processing it back into FORTRAN 90 were written. Finally, FOR_STRUCT does not have the ability to restructure the RELAP5-3D code which contains pre-compiler directives. Variations of a file were processed with different pre-compiler options switched on or off, ensuring that every block of code was restructured. Then the variations were recombined to create a completely restructured source file. Unix scripts were written to perform these tasks, as well as to make some minor formatting improvements. In total, 447 files comprising some 180,000 lines of FORTRAN code were restructured. These showed significant reduction in the number of logic jumps contained as measured by reduction in the number of GOTO statements and line labels. The average number of GOTO statements per subroutine dropped from 8.8 before restructuring to 5.3 afterwards, a reduction of 40%. The maximum number of GOTO statements in any subroutine dropped from 213 to 99, a factor of 2.1. Finally, the maximum number of statement labels dropped from 210 to 43, a factor of nearly 5. While many blocks of code remain unstructured, a much greater fraction of the code is now structured. These measurements indicate a serious reduction in degree of interweaving of logic paths.
Integration of geostatistical techniques and intuitive geology in the 3-D modeling process
Heine, C.J.; Cooper, D.H. (Saudi ARAMCO, Dhahran (Saudi Arabia))
1996-01-01T23:59:59.000Z
The development of 3-D geologic models for reservoir description and simulation has traditionally relied on the computer derived interpolation of well data in a geocelluar stratigraphic framework. The quality of the interpolation has been directly dependent on the nature of the interpolation method, and ability of the Interpolation scheme to accurately predict the value of geologic attributes away from the well. Typically, interpolation methods employ deterministic or geostatistical algorithms which offer limited capacity for Integrating data derived from secondary analyses. These secondary analyses, which might include the results from 3-D seismic inversion, borehole imagery studies, or deductive reasoning, introduce a subjective component into what would otherwise be restricted to a purely mathematical treatment of geologic data. At Saudi ARAMCO an increased emphases is being placed on the role of the reservoir geologist in the development of 3-D geologic models. Quantitative results, based on numerical computations, are being enhanced with intuitive geology, derived from years of cumulative professional experience and expertise. Techniques such as template modeling and modified conditional simulation, are yielding 3-D geologic models, which not only more accurately reflect the geology of the reservoir, but also preserve geologic detail throughout the simulation process. This incorporation of secondary data sources and qualitative analysis has been successfully demonstrated in a clastic reservoir environment in Central Saudi Arabia, and serves as a prototype for future 3-D geologic model development.
Integration of geostatistical techniques and intuitive geology in the 3-D modeling process
Heine, C.J.; Cooper, D.H. [Saudi ARAMCO, Dhahran (Saudi Arabia)
1995-08-01T23:59:59.000Z
The development of 3-D geologic models for reservoir description and simulation has traditionally relied on the computer derived interpolation of well data in a geocelluar stratigraphic framework. The quality of the interpolation has been directly dependent on the nature of the interpolation method, and ability of the interpolation scheme to accurately predict the value of geologic attributes away from the well. Typically, interpolation methods employ deterministic or geostatistical algorithms which offer limited capacity for integrating data derived from secondary analyses. These secondary analyses, which might include the results from 3-D seismic inversion, borehole imagery studies, or deductive reasoning, introduce a subjective component into what would otherwise be restricted to a purely mathematical treatment of geologic data. At Saudi ARAMCO an increased emphasis is being placed on the role of the reservoir geologist in the development of 3-D geologic models. Quantitative results, based on numerical computations, are being enhanced with intuitive geology, derived from years of cumulative professional experience and expertise. Techniques such as template modeling and modified conditional simulation, are yielding 3-D geologic models, which not only more accurately reflect the geology of the reservoir, but also preserve geologic detail throughout the simulation process. This incorporation of secondary data sources and qualitative analysis has been successfully demonstrated in a clastic reservoir environment in Central Saudi Arabia, and serves as a prototype for future 3-D geologic model development.
Integration of geostatistical techniques and intuitive geology in the 3-D modeling process
Heine, C.J.; Cooper, D.H. [Saudi ARAMCO, Dhahran (Saudi Arabia)
1996-12-31T23:59:59.000Z
The development of 3-D geologic models for reservoir description and simulation has traditionally relied on the computer derived interpolation of well data in a geocelluar stratigraphic framework. The quality of the interpolation has been directly dependent on the nature of the interpolation method, and ability of the Interpolation scheme to accurately predict the value of geologic attributes away from the well. Typically, interpolation methods employ deterministic or geostatistical algorithms which offer limited capacity for Integrating data derived from secondary analyses. These secondary analyses, which might include the results from 3-D seismic inversion, borehole imagery studies, or deductive reasoning, introduce a subjective component into what would otherwise be restricted to a purely mathematical treatment of geologic data. At Saudi ARAMCO an increased emphases is being placed on the role of the reservoir geologist in the development of 3-D geologic models. Quantitative results, based on numerical computations, are being enhanced with intuitive geology, derived from years of cumulative professional experience and expertise. Techniques such as template modeling and modified conditional simulation, are yielding 3-D geologic models, which not only more accurately reflect the geology of the reservoir, but also preserve geologic detail throughout the simulation process. This incorporation of secondary data sources and qualitative analysis has been successfully demonstrated in a clastic reservoir environment in Central Saudi Arabia, and serves as a prototype for future 3-D geologic model development.
Interchanging Interactive 3-d Graphics for Astronomy
C. J. Fluke; D. G. Barnes; N. T. Jones
2008-12-09T23:59:59.000Z
We demonstrate how interactive, three-dimensional (3-d) scientific visualizations can be efficiently interchanged between a variety of mediums. Through the use of an appropriate interchange format, and a unified interaction interface, we minimize the effort to produce visualizations appropriate for undertaking knowledge discovery at the astronomer's desktop, as part of conference presentations, in digital publications or as Web content. We use examples from cosmological visualization to address some of the issues of interchange, and to describe our approach to adapting S2PLOT desktop visualizations to the Web. Supporting demonstrations are available at http://astronomy.swin.edu.au/s2plot/interchange/
Madsen, N.; Steich, D.; Cook, G. [and others
1995-08-23T23:59:59.000Z
The DSI3D-RCS code is designed to numerically evaluate radar cross sections on complex objects by solving Maxwell`s curl equations in the time-domain and in three space dimensions. The code has been designed to run on the new parallel processing computers as well as on conventional serial computers. The DSI3D-RCS code is unique for the following reasons: Allows the use of unstructured non-orthogonal grids, allows a variety of cell or element types, reduces to be the Finite Difference Time Domain (FDTD) method when orthogonal grids are used, preserves charge or divergence locally (and globally), is conditionally stable, is selectively non-dissipative, and is accurate for non-orthogonal grids. This method is derived using a Discrete Surface Integration (DSI) technique. As formulated, the DSI technique can be used with essentially arbitrary unstructured grids composed of convex polyhedral cells. This implementation of the DSI algorithm allows the use of unstructured grids that are composed of combinations of non-orthogonal the use of unstructured grids that are composed of combinations of non-orthogonal hexahedrons, tetrahedrons, triangular prisms and pyramids. This algorithm reduces to the conventional FDTD method when applied on a structured orthogonal hexahedral grid.
Mattia Villani
2015-02-24T23:59:59.000Z
ADM tetrad gravity is an Hamiltonian reformulation of General Relativity which gives new insight to the Dark Matter Problem. We impose constraints on the parameter space of ADM tetrad gravity with a Yukawa-like ansatz for the trace of the extrinsic curvature of the 3D hypersurfaces by fitting the orbit of the S2 star around the Black Hole in the Galactic center and using the perihelia of some of the planets of the Solar System. We find very thight constraints on the \\emph{strength} of the coupling, $4.2 \\,\\times \\, 10^{-4} \\, \\text{AU}\\,\\lesssim \\, \\delta \\, \\lesssim \\, 4.6 \\, \\times \\, 10^{-4} \\, \\text{AU}$, and an upper limit for the (inverse) scale length, $\\mu \\, \\lesssim \\, 3.5 \\, \\times \\, 10^{-6} \\, \\text{AU}^{-1}$.
Malba, Vincent (Livermore, CA)
1998-01-01T23:59:59.000Z
A manufacturable process for fabricating electrical interconnects which extend from a top surface of an integrated circuit chip to a sidewall of the chip using laser pantography to pattern three dimensional interconnects. The electrical interconnects may be of an L-connect or L-shaped type. The process implements three dimensional (3D) stacking by moving the conventional bond or interface pads on a chip to the sidewall of the chip. Implementation of the process includes: 1) holding individual chips for batch processing, 2) depositing a dielectric passivation layer on the top and sidewalls of the chips, 3) opening vias in the dielectric, 4) forming the interconnects by laser pantography, and 5) removing the chips from the holding means. The process enables low cost manufacturing of chips with bond pads on the sidewalls, which enables stacking for increased performance, reduced space, and higher functional per unit volume.
Malba, V.
1998-11-10T23:59:59.000Z
A manufacturable process for fabricating electrical interconnects which extend from a top surface of an integrated circuit chip to a sidewall of the chip using laser pantography to pattern three dimensional interconnects. The electrical interconnects may be of an L-connect or L-shaped type. The process implements three dimensional (3D) stacking by moving the conventional bond or interface pads on a chip to the sidewall of the chip. Implementation of the process includes: (1) holding individual chips for batch processing, (2) depositing a dielectric passivation layer on the top and sidewalls of the chips, (3) opening vias in the dielectric, (4) forming the interconnects by laser pantography, and (5) removing the chips from the holding means. The process enables low cost manufacturing of chips with bond pads on the sidewalls, which enables stacking for increased performance, reduced space, and higher functional per unit volume. 3 figs.
A Desktop 3D Printer in Safety-Critical Java
A Desktop 3D Printer in Safety-Critical Java Tórur Biskopstř Strřm Kongens Lyngby 2012 IMM-MSc-2012-critical use cases implemented according to the specification. This thesis presents a RepRap 3D desktop printer
Ames Lab 101: Real-Time 3D Imaging
Zhang, Song
2012-08-29T23:59:59.000Z
Ames Laboratory scientist Song Zhang explains his real-time 3-D imaging technology. The technique can be used to create high-resolution, real-time, precise, 3-D images for use in healthcare, security, and entertainment applications.
3D Visualization of Water Transport in Ferns
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
3D Visualization of Water Transport in Ferns 3D Visualization of Water Transport in Ferns Print Monday, 08 April 2013 00:00 Plants transport water through elongated cells called...
al modelado 3d: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Michael 72 ILLUSTRATING MATHEMATICS USING 3D PRINTERS CiteSeer Summary: Abstract. 3D printing technology can help to visualize proofs in mathematics. In this document we aim to...
abnormal 3-d mri: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...
axial 3-d pet: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...
auslese von 3d: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...
autostereoscopic 3d display: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
or restrict themselves to light dif- fusion in volumes. We use multi-material 3D printing to fabricate objects Additional Key Words and Phrases: 3D printing, optical fibers...
Characterizing tensile loading responses of 3D printed samples
Haid, Christopher M
2014-01-01T23:59:59.000Z
An experimental study was performed to characterize the loading response of samples manufactured through 3D printing. Tensile testing was performed on a number of 3D printed samples created through Fused Filament Fabrication ...
Fab trees for designing complex 3D printable materials
Wang, Ye, M. Eng. Massachusetts Institute of Technology
2013-01-01T23:59:59.000Z
With more 3D printable materials being invented, 3D printers nowadays could replicate not only geometries, but also appearance and physical properties. On the software side, the tight coupling between geometry and material ...
adaptive 3-d segmentation: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Farag, Aly A. 343 946 IEEE TRANSACTIONS ON MEDICAL IMAGING, VOL. 18, NO. 10, OCTOBER 1999 Model-Based Quantitation of 3-D Magnetic Biology and Medicine Websites Summary: of 3-D...
3D printing rises to the occasion | ornl.gov
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
3D printing rises to the occasion ORNL group shows how it's done, one layer at a time A perforated metal box produced by an Arcam 3D printer. This detailed A perforated metal box...
Animation : 2D versus 3D and their combined effect
Au, Kristin C
2014-01-01T23:59:59.000Z
This thesis studies the differences in the perception of space and character movement between 2D and 3D animation. 2D animation is defined by elements constructed in a 2D environment while 3D animation by elements constructed ...
Tracking Objects Using 3D Edge Detectors February 2013
O'Leary, Dianne P.
Tracking Objects Using 3D Edge Detectors February 2013 SIAM CSE 2013 Dianne P. O'Leary c 2013 1 #12;Tracking Objects Using 3D Edge Detectors Dianne P. O'Leary Computer Science Dept. and Institute
Paris-Sud XI, Université de
and Multilinguality: Some Non-Intrusive and Dynamic e-learning-oriented Scenarios based on Textual Information Samuel (Metaverse Roadmap Report, 2007). We will present some non-intrusive and dynamic e-learning based scenarios to these scenarios as non-intrusive because they do not interrupt the user's activities within the immersive 3D en
Virtuelle Realität; Xd Vrml; G. Zachmann; Verhalten Und Animationen; Achtung Vrml Vr; G. Zachmann; Virtuelle Realität; Simulation Ws; Xd Vrml; Vorteile Von Xd
C § ? Die Spezifikation von VRML ist an einigen Stellen nicht eindeutig § ? In X3D präzisiert § ? X3D hat 100+ Knoten (aufgeteilt in Components / Profiles) § ? VRML hat nur 54 Knoten § ? X3D hat 3 verschiedene sog. "File Encodings": § ? Classic: sieht aus wie VRML; Suffix =.wrl oder.x3dv- Jede Software, die X3D lesen kann, kann (im Prinzip) auch VRML lesen
Power-Supply-Network Design in 3D Integrated Systems
Lim, Sung Kyu
Power-Supply-Network Design in 3D Integrated Systems Michael B. Healy and Sung Kyu Lim School power-supply noise in a layout- level 3D design prototype, and the impact of possible 3D-specific changes to the power-supply network design and topology. Our results show that distributing power-supply
Deep Learning Representation using Autoencoder for 3D Shape Retrieval
benchmarks. I. INTRODUCTION With the fast development of 3D printer, Microsoft Kinect sensor and laserDeep Learning Representation using Autoencoder for 3D Shape Retrieval Zhuotun Zhu, Xinggang Wang@hust.edu.cn Abstract--We study the problem of how to build a deep learning representation for 3D shape. Deep learning
Dynamic 3D Graphics Workload Characterization and the Architectural Implications
Mitra, Tulika
for this de#12;ciency is the absence of a detailed workload characterization of 3D applications. This paper previous similar studies because it focuses on dynamic behaviors of 3D applications, speci#12;cally, corre- lations of workload statistics among neighboring frames in interactive 3D applications. Such inter
3-D Earth model more accurately pinpoints explosions
- 1 - 3-D Earth model more accurately pinpoints explosions October 25, 2013 During the Cold War, U) have partnered to develop a 3-D model of the Earth's mantle and crust called SALSA3D (Sandia-Los Alamos of explosions. Significance of the research After an explosion, the energy travels through the Earth as waves
Tips and Tricks for Using the 3D Interpolation Tool
Wright, Dawn Jeannine
Tips and Tricks for Using the 3D Interpolation Tool This document describes how to download the 3D interpolation tool and use it for the purpose of performing multidimensional analysis on Marine, Atmospheric, Petroleum, Geological, and Groundwater point data. The 3D interpolation tool leverages new methods to solve
Making a 3D Model of the Moon's Surface
Christian, Eric
information are we lack- ing? What additional information could we learn from a 3D model of the space shuttle? Show the students a 3D model of the space shuttle. What can we learn about the space shuttle from1 Making a 3D Model of the Moon's Surface Learning Objectives: · Students will make estimates about
Hardware Assistance for Trustworthy Systems through 3-D Integration
California at Santa Barbara, University of
Hardware Assistance for Trustworthy Systems through 3-D Integration Jonathan Valamehr , Mohit a separate control plane, stacked using 3- D integration, that allows for the function and economics computation plane by at- taching an optional control plane using 3-D integration. In a developed example we
3-D Graphics in R Ohio State University
Gotelli, Nicholas J.
3-D Graphics in R Luke Keele Ohio State University December 6, 2005 Three dimensional graphics may. And it is a good choice, but to get publication quality 3-D graphics requires more work than typically re- quired to produce quality graphics with the wireframe command. The standard 3-D plot command in R is persp. While
3-D cinematography with approximate and no geometry
Magnor, Marcus
3-D cinematography with approximate and no geometry Martin Eisemann, Timo Stich and Marcus Magnor Abstract 3-D cinematography is a new step towards full immersive video, allow- ing complete control of the book Image and Geometry Processing for 3-D Cinematography published by Springer. 1 Introduction
3D Printing Prof. Hank Dietz & Paul Eberhart
Dietz, Henry G. "Hank"
3D Printing Prof. Hank Dietz & Paul Eberhart September 28, 2013 University of Kentucky Electrical/Craft: paper moves in Y, knife in X EDM/Laser: X/Y bed, vaporizes material #12;Subtractive 3D CNC: Computer "The whole is greater than the sum of its parts." Aristotle #12;Additive 3D Building Material
3D PRINTING FOR INTELLIGENT METALLIC STRUCTURES M. Strantza1
Boyer, Edmond
3D PRINTING FOR INTELLIGENT METALLIC STRUCTURES M. Strantza1 , D. De Baere2 , M. Rombouts3 , SSHM system is produced by 3D printing or additive manufacturing. Additive Manufacturing (AM) is a "process to enable its implementation. This work demonstrates the feasibility study of eSHM systems produced by 3D
PWP3D: Real-time Segmentation and Tracking of 3D Objects Victor A. Prisacariu Ian D. Reid
Oxford, University of
the discrimination between statistical foreground and background appearance models, via direct optimisation of the 3D segmentation and 2D to 3D pose tracking, using a known 3D model. Given such a model, we aim to maximise embedding function, and we define an energy over this region and its immediate background surroundings based
3D Least Squares Velocity from 3D Doppler Radial X. Chen, J.L. Barron, R.E. Mercer
Barron, John
neighbourhoods to compute local 3D velocity. Radial velocity (measured by the Doppler effect) is the component3D Least Squares Velocity from 3D Doppler Radial Velocity X. Chen, J.L. Barron, R.E. Mercer Dept. Radial velocity can be used to predict the motion of storms in sequences of Doppler radar datasets
Effect of rotating electric field on 3D complex (dusty) plasma
Woerner, L.; Nosenko, V.; Ivlev, A. V.; Zhdanov, S. K.; Thomas, H. M.; Morfill, G. E. [Max-Planck-Institut fuer extraterrestrische Physik, D-85741 Garching (Germany); Kroll, M.; Schablinski, J.; Block, D. [Christian-Albrechts Universitaet zu Kiel, D-24118 Kiel (Germany)
2011-06-15T23:59:59.000Z
The effect of rotating electric field on 3D particle clusters suspended in rf plasma was studied experimentally. Spheroidal clusters were suspended inside a glass box mounted on the lower horizontal rf electrode, with gravity partially balanced by thermophoretic force. Clusters rotated in the horizontal plane, in response to rotating electric field that was created inside the box using conducting coating on its inner surfaces (''rotating wall'' technique). Cluster rotation was always in the direction of applied field and had a shear in the vertical direction. The angular speed of rotation was 10{sup 4}-10{sup 7} times lower than applied frequency. The experiment is compared to a recent theory.
Application Of 3D Inversion To Magnetotelluric Data In The Ogiri...
difference method. A Bayesian criterion ABIC is applied to searching for the optimum trade-off among the minimization of the data misfit, model roughness and static shifts. The...
THE APPLICATIONS FOR 3D INVERSE OPAL MICROSTRUCTURES TAE WAN KIM
Braun, Paul
) devices, but also it can be useful in designing a dye- sensitized solar cell (DSSC). The first chapter colloidal microstructures. The second and third chapter will focus on the MEMS devices and a DSSC in order the opportunity to continue his work on the DSSC project. I thank my parenst, who raised me in a difficult
3-D Inversion Of Borehole-To-Surface Electrical Data Using A
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind ProjectsourceInformationColorado3 PhasesIndonesia
Application Of 3D Inversion To Magnetotelluric Data In The Ogiri Geothermal
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcatAntrim County, Michigan:Applewood, Colorado: EnergyDispersion
3-D Interpretation Of Magnetotelluric Data At The Bajawa Geothermal...
Interpretation Of Magnetotelluric Data At The Bajawa Geothermal Field, Indonesia Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Paper: 3-D...
3-D Combustion Simulation Strategy Status, Future Potential,...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Combustion Simulation Strategy Status, Future Potential, and Application Issues 3-D Combustion Simulation Strategy Status, Future Potential, and Application Issues 2004 Diesel...
automated 3-d voxel: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Websites Summary: from a real-life application. 1 Introduction Recent advances in 3D printing technology have made of materials, higher printing speeds, and lower costs....
automated 3d correlative: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Bosch, Frdric 8 Bridging the Gap: Automated Steady Scaffoldings for 3D Printing Jrmie Dumas Computer Technologies and Information Sciences Websites Summary:...
assess 3d bone: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Websites Summary: from a real-life application. 1 Introduction Recent advances in 3D printing technology have made of materials, higher printing speeds, and lower costs....
Making 3D Printed Christmas Ornaments | GE Global Research
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
This Contributor Santa's sleigh becomes "Intelligent Machine" this Christmas Using 3D Printing to Redesign Santa's Sleigh A Sneak Peek Into Santa's Smarter Sleigh Subscribe to...
Energy Science and Technology Software Center (OSTI)
000191MLTPL01 NON-NRC FUNDED RELAP5-3D VERSION 4.x.x SOFTWARE REACTOR EXCURSION AND LEAK ANALYSIS PACKAGE - THREE DIMENSIONAL
Further Analysis of 3D Magnetotelluric Measurements Over the...
Coso Geothermal Field Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Further Analysis of 3D Magnetotelluric Measurements Over the Coso...
Novel 3-D Printed Inverters for Electric Vehicles Can Improve...
density of the prototype. In addition to the improvements to the inverter itself, 3-D printing uses less energy compared to conventional manufacturing, making the manufacturing...
Mapping crustal thickness using marine gravity data: Methods and uncertainties
Müller, Dietmar
of petroleum systems within passive margins. However, direct measurements of crustal thickness are sparse geophysical data, to estimate crustal thickness. We evaluated alternative gravity inversion methodol- ogies, but economic considerations make gravity modeling a more practical approach for mapping crustal thickness over
3-D Spectral IP Imaging: Non-Invasive Characterization DE FG02 96ER 14714
Morgan, F. Dale; Rodi, William; Lesmes, David
2000-06-01T23:59:59.000Z
The Earth Resources Laboratory (ERL) performed a broad foundational study of spectral induced polarization (SIP) for site characterization. The project encompassed laboratory studies of microgeometry and chemistry effects on Induced Polarization (IP), an investigation of electromagnetic coupling (emc) noise, and development of 3D modeling and inversion codes. The major finding of the project is that emc noise presents a critical limitation for field implementation of SIP and conventional correction methods are inadequate. The project developed a frequency domain 3D complex resistivity modeling and inversion code Laboratory experiments were conducted to study the effects of solution chemistry and microgeometry on the SIP response of sandstone. Results indicate that changes in chemistry affect the magnitude of the spectral IP response and changes in microgeometry affect the shape of the spectral IP response. The developed physiochemical IP model can be used to invert spectral IP data for an apparent grain size distribution. Laboratory studies over the last twenty years have shown that SIP data must be acquired over several decades of frequency and include frequencies greater than 1kHz. A model of the components of emc noise has been developed and investigation with this model showed that inductive coupling is the most significant component. The study concluded that emc limits the frequency range of usable field data to approximately 100 Hz and below for typical site conditions. Several correction schemes have been developed based on treating emc as noise to be removed from the data, but our investigation has shown that these are not adequate for high frequencies, greater than 100Hz. Laboratory studies have demonstrated that the greatest response is the frequency range greater than 1KHz, hence the emc problem must be resolved for field implementation of SIP to advance. The ERL developed 2D/3D time domain codes that perform inversions for charge abilities based on schemes introduced by Siegel (1959). The ERL has also developed a 3D complex resistivity code for inversion of frequency domain IP data. The algorithm accommodates a general earth model with a complex electrical resistivity as a function of frequency and 3-D spatial position. The forward problem is solved by the complex biconjugate gradient method, while the regularized inverse problem is solved by the nonlinear conjugate gradient method. Time domain field data was acquired along a single survey line at the FS-12 plume, Massachusetts Military Reservation. The data was inverted with the developed 2D time domain code with the results having an excellent match to monitoring well data. The data was further analyzed by an innovative scheme where a ''gross spectral chargeability'' was determined from time domain data. The results show that there is valuable information in the spectra of the data.
Interactive 3D Gene Expression Viewer Victor E. Gerth*
Vize, Peter D.
Interactive 3D Gene Expression Viewer Victor E. Gerth* University of Calgary, Department. The Interactive Gene Expression viewer provides a way to view spatial relationships between different gene expression patterns and anatomic features. Web based 3D enabled technologies such as the Interactive Gene
Anatomic measurement accuracy: CT parameters and 3D rendering effects
Vorperian, Houri K.
Anatomic measurement accuracy: CT parameters and 3D rendering effects Brian J Whyms a, E Michael of Neuroscience #12;INTRODUCTION · Measurements from 3D-CT rendering are used in research and clinical management-CT rendering techniques on measurements #12;METHODS Scanned: · 3 human mandibles · a phantom object Phantom
An Improved Vertex Caching Scheme for 3D Mesh Rendering
Lin, Gang
An Improved Vertex Caching Scheme for 3D Mesh Rendering Gang Lin and Thomas P.-Y. Yu Abstract to the graphics pipeline during rendering. To make effective use of the cache and facilitate rendering, it is key effective algorithm for generating a sequence for efficient rendering of 3D polygonal meshes based on greedy
PREASYMPTOTIC CHARGE OSCILLATIONS AROUND 3d IMPURITIES IN ALUMINIUM
Boyer, Edmond
on aluminium based transi- tion metal alloys can be explained in the LSF approxi- mation of the Anderson modelL-87 PREASYMPTOTIC CHARGE OSCILLATIONS AROUND 3d IMPURITIES IN ALUMINIUM V. ZLATI0106 and G. GRÜNER modčle d'Anderson la perturbation de densité électronique autour de certaines impuretés 3d dans l'aluminium
3D FFT for FPGAs Ben Humphries Martin C. Herbordt
Herbordt, Martin
computations such as those used in Molecular Dynamics simulations. On FPGAs, however, the 3D FFT was thought Dynamics simulations (MD). Somewhat sur- prisingly, although MD on FPGAs has been widely studied, we3D FFT for FPGAs Ben Humphries Martin C. Herbordt Department of Electrical and Computer
Collaborative 3D Visualization on Large Screen Displays
Barbosa, Alberto
reality (VR) system designed to support collaborative visualization of 3D environments, applied in collaborative work. This paper presents a system that uses remotely located wall sized displays, to offer immersive, interactive collaborative visualization and review of 3D CAD models for engineering applications
BIOLOGICALLY MOTIVATED 3D FACE RECOGNITION Albert Ali Salah
BIOLOGICALLY MOTIVATED 3D FACE RECOGNITION by Albert Ali Salah B.S, in Computer Engineering, Bogazi of Doctor of Philosophy Graduate Program in BogaziÂ¸ci University 2007 #12;ii BIOLOGICALLY MOTIVATED 3D FACE. Hayim Molinas. #12;iv ACKNOWLEDGEMENTS With gratitude to my PhD advisor Lale Akarun for her boundless
3D Wavelet-Based Filter and Method
Moss, William C. (San Mateo, CA); Haase, Sebastian (San Francisco, CA); Sedat, John W. (San Francisco, CA)
2008-08-12T23:59:59.000Z
A 3D wavelet-based filter for visualizing and locating structural features of a user-specified linear size in 2D or 3D image data. The only input parameter is a characteristic linear size of the feature of interest, and the filter output contains only those regions that are correlated with the characteristic size, thus denoising the image.
CREATING 3D ANIMATED HUMAN BEHAVIORS FOR VIRTUAL WORLDS
Plotkin, Joshua B.
i CREATING 3D ANIMATED HUMAN BEHAVIORS FOR VIRTUAL WORLDS Jan M. Allbeck A DISSERTATION in Computer, and a scholar. #12;iv ABSTRACT CREATING 3D ANIMATED HUMAN BEHAVIORS FOR VIRTUAL WORLDS Jan M. Allbeck Norman I. Badler Creating virtual scenarios that simulate a substantial human population with typical and varied
Chopper: Partitioning models into 3D-printable parts
Luo, Linjie
3D printing technology is rapidly maturing and becoming ubiquitous. One of the remaining obstacles to wide-scale adoption is that the object to be printed must fit into the working volume of the 3D printer. We propose a ...
FSU Office of Research Program in Interdisciplinary Computing (PIC) What is 3D printing?
Ronquist, Fredrik
(PIC) What is 3D printing? 3D printing is a process of making. 3D printing is distinct from traditional machining techniques, which mostly organs, meat, circuit boards and batteries. 3D printing impacts nearly every
Circularly symmetric solutions in three-dimensional Teleparallel, f(T) and Maxwell-f(T) gravity
Gonzalez, P A; Vasquez, Yerko
2011-01-01T23:59:59.000Z
We formulate teleparallel 3D gravity and we extract circularly symmetric solutions, showing that they coincide with the BTZ and Deser-de-Sitter solutions of standard 3D gravity. However, extending into f(T) 3D gravity, that is considering arbitrary functions of the torsion scalar in the action, we obtain "deformed" BTZ-like and Deser-de-Sitter-like solutions, without any requirement of the sign of the cosmological constant. Finally, extending our analysis incorporating the electromagnetic sector, we show that Maxwell-f(T) gravity accepts deformed charged BTZ-like solutions. Interestingly enough, the deformation in this case brings qualitatively novel terms, contrary to the pure gravitational solutions where the deformation is expressed only through changes in the coefficients. Such novel behaviors reveal the new features that the f(T) structure brings in 3D gravity.
Real time 3D and heterogeneous data fusion
Little, C.Q.; Small, D.E.
1998-03-01T23:59:59.000Z
This project visualizes characterization data in a 3D setting, in real time. Real time in this sense means collecting the data and presenting it before it delays the user, and processing faster than the acquisition systems so no bottlenecks occur. The goals have been to build a volumetric viewer to display 3D data, demonstrate projecting other data, such as images, onto the 3D data, and display both the 3D and projected images as fast as the data became available. The authors have examined several ways to display 3D surface data. The most effective was generating polygonal surface meshes. They have created surface maps form a continuous stream of 3D range data, fused image data onto the geometry, and displayed the data with a standard 3D rendering package. In parallel with this, they have developed a method to project real-time images onto the surface created. A key component is mapping the data on the correct surfaces, which requires a-priori positional information along with accurate calibration of the camera and lens system.
Suitability for 3D Printed Parts for Laboratory Use
Zwicker, Andrew P. [PPPL; Bloom, Josh [PPPL; Albertson, Robert [PPPL; Gershman, Sophia [PPPL
2014-08-01T23:59:59.000Z
3D printing has become popular for a variety of users, from industrial to the home hobbyist, to scientists and engineers interested in producing their own laboratory equipment. In order to determine the suitability of 3D printed parts for our plasma physics laboratory, we measured the accuracy, strength, vacuum compatibility, and electrical properties of pieces printed in plastic. The flexibility of rapidly creating custom parts has led to the 3D printer becoming an invaluable resource in our laboratory and is equally suitable for producing equipment for advanced undergraduate laboratories.
Azimuthal reflectivity inversion
mshepher
2012-10-30T23:59:59.000Z
D., 2010, Principle stress estimation in shale plays using 3D seismic : GeoCanada. Hudson, J. A., 1981, Wave speeds and attenuation of elastic waves in ...
Molecular Predictors of 3D Morphogenesis by Breast Cancer Cell Lines in 3D Culture
Han, Ju; Chang, Hang; Giricz, Orsi; Lee, Genee; Baehner, Frederick; Gray, Joe; Bissell, Mina; Kenny, Paraic; Parvin, Bahram
2010-02-01T23:59:59.000Z
Correlative analysis of molecular markers with phenotypic signatures is the simplest model for hypothesis generation. In this paper, a panel of 24 breast cell lines was grown in 3D culture, their morphology was imaged through phase contrast microscopy, and computational methods were developed to segment and represent each colony at multiple dimensions. Subsequently, subpopulations from these morphological responses were identified through consensus clustering to reveal three clusters of round, grape-like, and stellate phenotypes. In some cases, cell lines with particular pathobiological phenotypes clustered together (e.g., ERBB2 amplified cell lines sharing the same morphometric properties as the grape-like phenotype). Next, associations with molecular features were realized through (i) differential analysis within each morphological cluster, and (ii) regression analysis across the entire panel of cell lines. In both cases, the dominant genes that are predictive of the morphological signatures were identified. Specifically, PPAR? has been associated with the invasive stellate morphological phenotype, which corresponds to triple-negative pathobiology. PPAR? has been validated through two supporting biological assays.
Oldenburg, Douglas W.
UBC Geophysical InversionFacility Modelling and Inversion of EMI data collected over magnetic soils of EMI data acquired at sites with magnetic soils Â· Geophysical Proveouts Â· Geonics EM63 Data Â· First model parameters: Â· Location Â· Orientation Â· Polarizabilities 4 #12;UBC Geophysical Inversion Facility
3D-Printed Car by Local Motors- The Strati
Broader source: Energy.gov [DOE]
A timelapse video of the production process behind The Strati - the 3D-printed car by Local Motors, which manufactured with Oak Ridge National Laboratory (ORNL) and delivered at the International Manufacturing Technology Show (IMTS) in September of 2014.
3D Representations for Software Visualization Andrian Marcus
research from software analysis, information visualization, human-computer interaction, and cognitive, texture, abstraction mechanism, and by supporting new manipulation techniques and user interfaces.2 [Information Interfaces and Presentation] User Interfaces Keywords: Software visualization, 3D visualization
Polymer Solar Cells: New Materials, 3D Morphology, and Tandem...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Polymer Solar Cells: New Materials, 3D Morphology, and Tandem Devices March 2, 2010 at 3pm36-428 Ren Janssen Molecular Materials and Nanosystems, Eindhoven University of...
3?D Surface Topography Boundary Conditions in Seismic Wave Modelling
Hestholm, Stig
2001-01-01T23:59:59.000Z
New alternative formulations of exact boundary conditions for arbitrary three{dimensional (3?D) free surface topographies on seismic media have been derived. They are shown to be equivalent with previously published ...
EVENT CLASSIFICATION FOR 3-D POSITION SENSITIVE SEMICONDUCTOR DETECTORS
He, Zhong
Generation Physics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.2.1 Charge Cloud Generation . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 iv #12;3.1.2 Experimental 3-D Detectors . . . . . . . . . . . . . . . . . . . . . . 50 3.2 Readout . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 3.4 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 IV
A fast 3D full-wave solver for nanophotonics
Zhang, Lei, Ph. D. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science.
2007-01-01T23:59:59.000Z
Conventional fast integral equation solvers seem to be ideal approaches for simulating 3-D nanophotonic devices, as these devices are considered to be open structures, generating fields in both an interior channel and in ...
3D/4D geospatial visualization using Makai Voyager
Frandsen, Jannette B.
3D/4D geospatial visualization using Makai Voyager John C. Anderson Makai Ocean Engineering, Inc-based, geospatially-enabled software that can fuse and visualize large, multi-variable data sets that change in space
Topobo : a 3-D constructive assembly system with kinetic memory
Raffle, Hayes Solos, 1974-
2004-01-01T23:59:59.000Z
We introduce Topobo, a 3-D constructive assembly system em- bedded with kinetic memory, the ability to record and playback physical motion. Unique among modeling systems is Topobo's coincident physical input and output ...
Content-oriented 3D reconstruction from image streams
Knoblauch, Daniel
2011-01-01T23:59:59.000Z
the automatisation of SaM from image sequences and videosby the input images to improve 3D reconstructions in SaMMo- tion (SaM). Structure and Motion from image sequences or
aperture radar 3d: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
study was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a...
accuracy 3d quantum: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
study was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a...
Towards an Intelligent Storyboarding Tool for 3D Arnav Jhala
Young, R. Michael
cinematography. 1. OVERVIEW Storyboarding tools enable authors/designers of cinematic narratives in games such as The Rule of Thirds in building cinematography systems for 3D virtual environments. The trend in recent
3D-2D ASYMPTOTIC ANALYSIS FOR INHOMOGENEOUS THIN FILMS
3D-2D ASYMPTOTIC ANALYSIS FOR INHOMOGENEOUS THIN FILMS plate models, periodic pr* *o- files, and within the context of optimal design for thin films 5. Third application - Optimal design of a thin film 19 6. Final Remarks
2013 Santa Sleigh 3D Printing Winner | GE Global Research
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Engineers Pick Winner of 2013 Santa Sleigh 3D Printing Design Contest Click to email this to a friend (Opens in new window) Share on Facebook (Opens in new window) Click to share...
Beyond 3D Printing: The New Dimensions of Additive Fabrication
Keating, Steven John
Additive fabrication, often referred to as 3D printing, is the construction of objects by adding material. This stands in contrast to subtractive methods, which involve removing material by means of milling or cutting. ...
Fitting of Constrained Models to Poor 3D Data
Robertson, Craig; Fisher, Robert B.; Werghi, Naoufel; Ashbrook, Anthony
2000-01-01T23:59:59.000Z
In this work we have addressed the question of whether it is possible to extract parametric models of features from poor quality 3D data. In doing this we have examined the applicability of an evolutionary strategy to the ...
3-D Seismic Methods for Shallow Imaging Beneath Pavement
Miller, Brian
2013-05-31T23:59:59.000Z
The research presented in this dissertation focuses on survey design and acquisition of near-surface 3D seismic reflection and surface wave data on pavement. Increased efficiency for mapping simple subsurface interfaces through a combined use...
Building a database of 3D scenes from user annotations
Russell, Bryan C.
In this paper, we wish to build a high quality database of images depicting scenes, along with their real-world three-dimensional (3D) coordinates. Such a database is useful for a variety of applications, including training ...
3D assembly and actuation of nanopatterned membranes using nanomagnets
Nichol, Anthony John
2011-01-01T23:59:59.000Z
A new method for aligning and actuating membranes for 3D nano-assembly based on the interactions of nanomagnets has been developed. Arrays of nanopatterned magnetic material are integrated onto thin-film membranes. It is ...
Automatic 3D facial expression analysis in videos
Chang, Y; Vieira, M; Turk, M; Velho, L
2005-01-01T23:59:59.000Z
with the background in videos [26] are important topics forSystem for Real-Time 3D Video. IEEE Int. Workshop onExpression Analysis in Videos Ya Chang 1 , Marcelo Vieira
3D Printed Microscope for Mobile Devices that Cost Pennies
Erikson, Rebecca; Baird, Cheryl; Hutchinson, Janine
2014-09-15T23:59:59.000Z
Scientists at PNNL have designed a 3D-printable microscope for mobile devices using pennies worth of plastic and glass materials. The microscope has a wide range of uses, from education to in-the-field science.
3D Object Digitization: Topology Preserving Reconstruction Peer Stelldinger
Latecki, Longin Jan
is the 3D generalization of #12;the 2D Gauss digitization (see [4]) which has been used by Gauss to compute 2. There are 14 different cases of canonical configurations. In dense digitiza- tions of r
3D Module Placement for Congestion and Power Noise Reduction
Lim, Sung Kyu
3D Module Placement for Congestion and Power Noise Reduction Jacob R. Minz School of ECE Georgia that copies are not made or distributed for profit or commercial advantage and that copies bear this notice
The equilibrium of dense plasma in a gravity field
B. V. Vasiliev
2000-10-31T23:59:59.000Z
The equilibrium of dense plasma in a gravity field and problem of a gravity-induced electric polarization in this matter are discussed. The calculation for metals performed before shows that both - the gravity-induced compressive strain and the gravity-induced electric field - are inversely proportional to their Young moduli. The calculation for high dense plasma, where Young modulus is equal to zero, shows that there is another effect: each cell of this plasma inside a celestial body in own gravity field obtains the small positive electric charge. It happens as heavy ions sag on to light electron clouds. A celestial body stays electrically neutral as a whole, because the negative electric charge concentrates on its surface. The gravity-induced positive volume charge is very small, its order of magnitude equals to $10^{-18}e$ per atom only. But it is sufficient for the complete conterbalancing of the gravity force.
Review: 3D Printing: Social and Cultural Trajectories Symposium - 3D Printing Industry http://3dprintingindustry.com/2013/12/11/review-3d-printing-social-cultural-trajectories-symposium/[12/12/2013 11:25:00 AM] Review: 3D Printing: Social and Cultural Trajectories Symposium BY ANGELA DALY & DARCY ALLEN ON WED
Toward single cell traction microscopy within 3D collagen matrices
Hall, Matthew S. [Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853 (United States); Long, Rong [Department of Mechanical Engineering, University of Alberta, Edmonton, AB, Canada T6G 2G8 (Canada); Feng, Xinzeng [Department of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853 (United States); Huang, YuLing [Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853 (United States); Hui, Chung-Yuen [Department of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853 (United States); Wu, Mingming, E-mail: mw272@cornell.edu [Department of Biological and Environmental Engineering, Cornell University, Ithaca, NY 14853 (United States)
2013-10-01T23:59:59.000Z
Mechanical interaction between the cell and its extracellular matrix (ECM) regulates cellular behaviors, including proliferation, differentiation, adhesion, and migration. Cells require the three-dimensional (3D) architectural support of the ECM to perform physiologically realistic functions. However, current understanding of cell–ECM and cell–cell mechanical interactions is largely derived from 2D cell traction force microscopy, in which cells are cultured on a flat substrate. 3D cell traction microscopy is emerging for mapping traction fields of single animal cells embedded in either synthetic or natively derived fibrous gels. We discuss here the development of 3D cell traction microscopy, its current limitations, and perspectives on the future of this technology. Emphasis is placed on strategies for applying 3D cell traction microscopy to individual tumor cell migration within collagen gels. - Highlights: • Review of the current state of the art in 3D cell traction force microscopy. • Bulk and micro-characterization of remodelable fibrous collagen gels. • Strategies for performing 3D cell traction microscopy within collagen gels.
Pos3D: Um pos-processador generico para modelos 3D de elementos finitos MARCELO TILIO M. CARVALHO1
Pos3D: Um pÂ´os-processador genÂ´erico para modelos 3D de elementos finitos MARCELO TILIO M. CARVALHO interpretacÂ¸~ao e visualizacÂ¸~ao dos resultados. Um dos mÂ´etodos numÂ´ericos mais utilizado neste tipo deÂ´os-processador deve ser genÂ´erico, o que im- plica em ser independente do programa utilizado na anÂ´alise num
Pos3D: Um p osprocessador gen erico para modelos 3D de elementos finitos MARCELO TILIO M. CARVALHO 1
Pos3D: Um pâ?? osÂprocessador genâ?? erico para modelos 3D de elementos finitos MARCELO TILIO Mâ??ďż˝sico) e interpretacâ?şâ?ťao e visualizacâ?şâ?ťao dos resultados. Um dos mâ??etodos numâ??ericos mais utilizado nesteâ??osÂprocessador deve ser genâ??erico, o que imÂ plica em ser independente do programa utilizado na anâ??alise num
Erer, Hakan [Department of Chemistry, Faculty of Arts and Sciences, Eski?ehir Osmangazi University, 26480 Eski?ehir (Turkey); Ye?ilel, Okan Zafer, E-mail: yesilel@ogu.edu.tr [Department of Chemistry, Faculty of Arts and Sciences, Eski?ehir Osmangazi University, 26480 Eski?ehir (Turkey); Ar?c?, Mürsel [Department of Chemistry, Faculty of Arts and Sciences, Eski?ehir Osmangazi University, 26480 Eski?ehir (Turkey); Keskin, Seda [Department of Chemical and Biological Engineering, Koç University, ?stanbul (Turkey); Büyükgüngör, Orhan [Department of Physics, Faculty of Arts and Sciences, Ondokuz May?s University, 55139 Samsun (Turkey)
2014-02-15T23:59:59.000Z
Hydrothermal reactions of rigid 1,4-bis(imidazol-1-yl)benzene (dib) and 1,4-bis(imidazol-1-yl)-2,5-dimethylbenzene (dimb) with deprotonated thiophene-2,5-dicarboxylic acid (H{sub 2}tdc) in the presence of Zn(II) and Cd(II) salts in H{sub 2}O produced three new metal–organic frameworks, namely, [Zn(µ-tdc)(H{sub 2}O)(µ-dib)]{sub n} (1), [Cd(µ-tdc)(H{sub 2}O)(µ-dib)]{sub n} (2), and ([Cd{sub 2}(µ{sub 3}-tdc){sub 2}(µ-dimb){sub 2}]·(H{sub 2}O)){sub n}(3). These MOFs were characterized by FT-IR spectroscopy, elemental, thermal (TG, DTA, DTG and DSC), and single-crystal X-ray diffraction analyses. Isomorphous complexes 1 and 2 reveal polycatenated 2D+2D?3D framework based on an undulated (4,4)-sql layer. Complex 3 exhibits a new 4-fold interpenetrating 3D framework with the point symbol of 6{sup 6}. Molecular simulations were used to assess the potentials of the complexes for H{sub 2} storage application. Moreover, these coordination polymers exhibit blue fluorescent emission bands in the solid state at room temperature. - Graphical abstract: In this study, hydrothermal reactions of rigid 1,4-bis(imidazol-1-yl)benzene (dib) and 1,4-bis(imidazol-1-yl)-2,5-dimethylbenzene (dimb) with deprotonated thiophene-2,5-dicarboxylic acid (H{sub 2}tdc) in the presence of Zn(II) and Cd(II) salts in H{sub 2}O produced three new metal–organic frameworks. Isomorphous complexes 1 and 2 reveal polycatenated 2D+2D?3D framework based on an undulated (4,4)-sql layer. Complex 3 exhibits a new 4-fold interpenetrating 3D framework with the point symbol of 6{sup 6}. Molecular simulations were used to assess the potentials of the complexes for H{sub 2} storage application. These coordination polymers exhibit blue fluorescent emission bands in the solid state at room temperature. Display Omitted - Highlights: • Complexes 1 and 2 display polycatenated 2D+2D?3D framework. • Complex 3 exhibits a new 4-fold interpenetrating 3D framework. • Complex 1 adsorbs the highest amount of H{sub 2} at 100 bar and 298 K. • Complexes display blue fluorescent emission bands.
Cosmology of modified (but second order) gravity
Tomi S. Koivisto
2009-10-21T23:59:59.000Z
This is a brief review of modified gravity cosmologies. Generically extensions of gravity action involve higher derivative terms, which can result in ghosts and instabilities. There are three ways to circumvent this: Chern-Simons terms, first order variational principle and nonlocality. We consider recent cosmological applications of these three classes of modified gravity models, in particular to the dark energy problem. The viable parameter spaces can be very efficiently constrained by taking into account cosmological data from all epochs in addition to Solar system tests and stability considerations. We make some new remarks concerning so called algebraic scalar-tensor theories, biscalar reformulation of nonlocal actions involving the inverse d'Alembertian, and a possible covariant formulation holographic cosmology with nonperturbative gravity.
Is nonrelativistic gravity possible?
Kocharyan, A. A. [School of Mathematical Sciences, Monash University, Clayton 3800 (Australia)
2009-07-15T23:59:59.000Z
We study nonrelativistic gravity using the Hamiltonian formalism. For the dynamics of general relativity (relativistic gravity) the formalism is well known and called the Arnowitt-Deser-Misner (ADM) formalism. We show that if the lapse function is constrained correctly, then nonrelativistic gravity is described by a consistent Hamiltonian system. Surprisingly, nonrelativistic gravity can have solutions identical to relativistic gravity ones. In particular, (anti-)de Sitter black holes of Einstein gravity and IR limit of Horava gravity are locally identical.
Advanced 3D Sensing and Visualization System for Unattended Monitoring
Carlson, J.J.; Little, C.Q.; Nelson, C.L.
1999-01-01T23:59:59.000Z
The purpose of this project was to create a reliable, 3D sensing and visualization system for unattended monitoring. The system provides benefits for several of Sandia's initiatives including nonproliferation, treaty verification, national security and critical infrastructure surety. The robust qualities of the system make it suitable for both interior and exterior monitoring applications. The 3D sensing system combines two existing sensor technologies in a new way to continuously maintain accurate 3D models of both static and dynamic components of monitored areas (e.g., portions of buildings, roads, and secured perimeters in addition to real-time estimates of the shape, location, and motion of humans and moving objects). A key strength of this system is the ability to monitor simultaneous activities on a continuous basis, such as several humans working independently within a controlled workspace, while also detecting unauthorized entry into the workspace. Data from the sensing system is used to identi~ activities or conditions that can signi~ potential surety (safety, security, and reliability) threats. The system could alert a security operator of potential threats or could be used to cue other detection, inspection or warning systems. An interactive, Web-based, 3D visualization capability was also developed using the Virtual Reality Modeling Language (VRML). The intex%ace allows remote, interactive inspection of a monitored area (via the Internet or Satellite Links) using a 3D computer model of the area that is rendered from actual sensor data.
Testbeam and Laboratory Characterization of CMS 3D Pixel Sensors
M. Bubna; E. Alagoz; A. Krzywda; O. Koybasi; K. Arndt; D. Bortoletto; I. Shipsey; G. Bolla; A. Kok; T. -E. Hansen; T. A. Hansen; G. U. Jensen; J. M. Brom; M. Boscardin; J. Chramowicz; J. Cumalat; G. F. Dalla Betta; M. Dinardo; A. Godshalk; M. Jones; M. D. Krohn; A. Kumar; C. M. Lei; L. Moroni; L. Perera; M. Povoli; A. Prosser; R. Rivera; A. Solano; M. M. Obertino; S. Kwan; L. Uplegger; C. D. Via; L. Vigani; S. Wagner
2014-04-30T23:59:59.000Z
The pixel detector is the innermost tracking device in CMS, reconstructing interaction vertices and charged particle trajectories. The sensors located in the innermost layers of the pixel detector must be upgraded for the ten-fold increase in luminosity expected with the High- Luminosity LHC (HL-LHC) phase. As a possible replacement for planar sensors, 3D silicon technology is under consideration due to its good performance after high radiation fluence. In this paper, we report on pre- and post- irradiation measurements for CMS 3D pixel sensors with different electrode configurations. The effects of irradiation on electrical properties, charge collection efficiency, and position resolution of 3D sensors are discussed. Measurements of various test structures for monitoring the fabrication process and studying the bulk and surface properties, such as MOS capacitors, planar and gate-controlled diodes are also presented.
Marschner, Steve
Presented at the IS&T/SID Fifth Color Imaging Conference, November 1997 Inverse Lighting, New York Abstract We introduce a technique for improving photographs using inverse lighting, a new process based on algorithms develÂ oped in computer graphics for computing the reflection of light in 3D
Torres-VerdĂn, Carlos
High-resolution geostatistical inversion of a seismic data set acquired in a Gulf of Mexico gas, UNOCAL Corporation Summary Geostatistical inversion is applied on a Gulf-of-Mexico, 3D post-stack seismic in this paper is located in the Gulf of Mexico, off the coast of Louisiana. Existing development wells reach two
B. L. Hu
1999-02-22T23:59:59.000Z
We give a summary of the status of current research in stochastic semiclassical gravity and suggest directions for further investigations. This theory generalizes the semiclassical Einstein equation to an Einstein-Langevin equation with a stochastic source term arising from the fluctuations of the energy-momentum tensor of quantum fields. We mention recent efforts in applying this theory to the study of black hole fluctuations and backreaction problems, linear response of hot flat space, and structure formation in inflationary cosmology. To explore the physical meaning and implications of this stochastic regime in relation to both classical and quantum gravity, we find it useful to take the view that semiclassical gravity is mesoscopic physics and that general relativity is the hydrodynamic limit of certain spacetime quantum substructures. Three basic issues - stochasticity, collectivity, correlations- and three processes - dissipation, fluctuations, decoherence- underscore the transformation from quantum micro structure and interaction to the emergence of classical macro structure and dynamics. We discuss ways to probe into the high energy activity from below and make two suggestions: via effective field theory and the correlation hierarchy. We discuss how stochastic behavior at low energy in an effective theory and how correlation noise associated with coarse-grained higher correlation functions in an interacting quantum field could carry nontrivial information about the high energy sector. Finally we describe processes deemed important at the Planck scale, including tunneling and pair creation, wave scattering in random geometry, growth of fluctuations and forms, Planck scale resonance states, and spacetime foams.
STELLOPT Modeling of the 3D Diagnostic Response in ITER
Lazerson, Samuel A
2013-05-07T23:59:59.000Z
The ITER three dimensional diagnostic response to an n=3 resonant magnetic perturbation is modeled using the STELLOPT code. The in-vessel coils apply a resonant magnetic perturbation (RMP) fi eld which generates a 4 cm edge displacement from axisymmetry as modeled by the VMEC 3D equilibrium code. Forward modeling of flux loop and magnetic probe response with the DIAGNO code indicates up to 20 % changes in measured plasma signals. Simulated LIDAR measurements of electron temperature indicate 2 cm shifts on the low field side of the plasma. This suggests that the ITER diagnostic will be able to diagnose the 3D structure of the equilibria.
3D rotational diffusion microrheology using 2D video microscopy
Rémy Colin; Minhao Yan; Loudjy Chevry; Jean-François Berret; Bérengčre Abou
2012-01-05T23:59:59.000Z
We propose a simple way to perform three-dimensional (3D) rotational microrheology using two-dimensional (2D) video microscopy. The 3D rotational brownian motion of micrometric wires in a viscous fluid is deduced from their projection on the focal plane of an optical microscope objective. The rotational diffusion coefficient of the wires of length between 1-100 \\mu m is extracted, as well as their diameter distribution in good agreement with electron microscopy measurements. This is a promising way to characterize soft visco-elastic materials, and probe the dimensions of anisotropic objects.
Modeling and Analysis of a Lunar Space Reactor with the Computer Code RELAP5-3D/ATHENA
Carbajo, Juan J [ORNL; Qualls, A L [ORNL
2008-01-01T23:59:59.000Z
The transient analysis 3-dimensional (3-D) computer code RELAP5-3D/ATHENA has been employed to model and analyze a space reactor of 180 kW(thermal), 40 kW (net, electrical) with eight Stirling engines (SEs). Each SE will generate over 6 kWe; the excess power will be needed for the pumps and other power management devices. The reactor will be cooled by NaK (a eutectic mixture of sodium and potassium which is liquid at ambient temperature). This space reactor is intended to be deployed over the surface of the Moon or Mars. The reactor operating life will be 8 to 10 years. The RELAP5-3D/ATHENA code is being developed and maintained by Idaho National Laboratory. The code can employ a variety of coolants in addition to water, the original coolant employed with early versions of the code. The code can also use 3-D volumes and 3-D junctions, thus allowing for more realistic representation of complex geometries. A combination of 3-D and 1-D volumes is employed in this study. The space reactor model consists of a primary loop and two secondary loops connected by two heat exchangers (HXs). Each secondary loop provides heat to four SEs. The primary loop includes the nuclear reactor with the lower and upper plena, the core with 85 fuel pins, and two vertical heat exchangers (HX). The maximum coolant temperature of the primary loop is 900 K. The secondary loops also employ NaK as a coolant at a maximum temperature of 877 K. The SEs heads are at a temperature of 800 K and the cold sinks are at a temperature of ~400 K. Two radiators will be employed to remove heat from the SEs. The SE HXs surrounding the SE heads are of annular design and have been modeled using 3-D volumes. These 3-D models have been used to improve the HX design by optimizing the flows of coolant and maximizing the heat transferred to the SE heads. The transients analyzed include failure of one or more Stirling engines, trip of the reactor pump, and trips of the secondary loop pumps feeding the HXs of the Stirling engines. Loss of one radiator sink has also been simulated. The effects of reduced gravity on the transients have also been investigated. The transients studied have been used to demonstrate the safety and the operability of the system. The results of the transients will be used to evaluate which transients the system can survive without damage and can continue operating at nominal or reduced power levels for the intended life time of the reactor.
Evaluation of PC-ISO for customized, 3D printed, gynecologic 192Ir HDR brachytherapy applicators
2015-01-01T23:59:59.000Z
15) The precision of 3D printers has been closely evaluatedmaterial substrates for 3D printers. It is not approved pertheir treatment. While 3D printers with the capability to
School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles
Evans, Paul
School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles Lead: Lharne Shaw 3D printing tile production. It will also assess the feasibility of introducing a 3D slip printing system into both
Improvement of 3D Printing Resolution by the Development of Shrinkable Materials
Chia, Helena
2014-01-01T23:59:59.000Z
learned a lot about 3D printing and myself in this processderived microstructures by 3D printing: bio-and structuralScaffold development using 3D printing with a starch-based
Evaluation of PC-ISO for customized, 3D printed, gynecologic 192Ir HDR brachytherapy applicators
2015-01-01T23:59:59.000Z
A, Iuliano L, Violante MG. 3D printing technique applied toTengg-Kobligk H, et al. 3D printing based on imaging data:biocompatible, sterilizable 3D printing material, and its
Improvement of 3D Printing Resolution by the Development of Shrinkable Materials
Chia, Helena
2014-01-01T23:59:59.000Z
derived microstructures by 3D printing: bio-and structuralScaffold development using 3D printing with a starch-basedderived microstructures by 3D printing: bio-and structural
Overall Dynamic Properties of 3-D periodic elastic composites
Ankit Srivastava; Sia Nemat-Nasser
2011-05-27T23:59:59.000Z
A method for the homogenization of 3-D periodic elastic composites is presented. It allows for the evaluation of the averaged overall frequency dependent dynamic material constitutive tensors relating the averaged dynamic ?eld variable tensors of velocity, strain, stress, and linear momentum. The formulation is based on micromechanical modeling of a representative unit cell of a composite proposed by Nemat-Nasser & Hori (1993), Nemat-Nasser et. al. (1982) and Mura (1987) and is the 3-D generalization of the 1-D elastodynamic homogenization scheme presented by Nemat-Nasser & Srivastava (2011). We show that for 3-D periodic composites the overall compliance (stiffness) tensor is hermitian, irrespective of whether the corresponding unit cell is geometrically or materially symmetric.Overall mass density is shown to be a tensor and, like the overall compliance tensor, always hermitian. The average strain and linear momentum tensors are, however, coupled and the coupling tensors are shown to be each others' hermitian transpose. Finally we present a numerical example of a 3-D periodic composite composed of elastic cubes periodically distributed in an elastic matrix. The presented results corroborate the predictions of the theoretical treatment.
Generic Programming in 3D Ralf Hinze a
Löh, Andres
Generic Programming in 3D Ralf Hinze a , Andres L¨oh b aInstitut f¨ur Informatik III, Universit mechanism is not restricted to equality: parsers, pretty-printers and several other functions are derivable: Haskell's pretty-printer, for instance, displays pairs and lists using a special mix-fix notation. If we
Studies of the 3D surface roughness height
Avisane, Anita; Rudzitis, Janis; Kumermanis, Maris [Institute of Mechanical Engineering, Riga Technical University, Ezermalas str. 6k, Riga (Latvia)
2013-12-16T23:59:59.000Z
Nowadays nano-coatings occupy more and more significant place in technology. Innovative, functional coatings acquire new aspects from the point of view of modern technologies, considering the aggregate of physical properties that can be achieved manipulating in the production process with the properties of coatings’ surfaces on micro- and nano-level. Nano-coatings are applied on machine parts, friction surfaces, contacting parts, corrosion surfaces, transparent conducting films (TCF), etc. The equipment available at present for the production of transparent conducting oxide (TCO) coatings with highest quality is based on expensive indium tin oxide (ITO) material; therefore cheaper alternatives are being searched for. One such offered alternative is zink oxide (ZnO) nano-coatings. Evaluating the TCF physical and mechanical properties and in view of the new ISO standard (EN ISO 25178) on the introduction of surface texture (3D surface roughness) in the engineering calculations, it is necessary to examine the height of 3D surface roughness, which is one of the most significant roughness parameters. The given paper studies the average values of 3D surface roughness height and the most often applied distribution laws are as follows: the normal distribution and Rayleigh distribution. The 3D surface is simulated by a normal random field.
ELECTROMOTION 2009 3D Analytical Calculation of Forces between
Paris-Sud XI, UniversitĂ© de
Co or NdFeB, the designers can use magnets owning a really rigid magnetization. They are the magnets whichELECTROMOTION 2009 1 3D Analytical Calculation of Forces between Linear Halbach-Type Permanent Magnet Arrays H. Allag1,2 , J-P. Yonnet1 and M. E. H. Latreche2 1- Laboratoire de GĂ©nie Electrique de
Electromagnetic Waves Propagation in 3D Plasma Configurations
Electromagnetic Waves Propagation in 3D Plasma Configurations Pavel Popovich, W. Anthony Cooper in a plasma strongly depends on the frequency, therefore the tools used for wave propagation studies are very that will allow for the calculation of the fields and energy deposition of a low-frequency wave propagating
STUDY AND DEVELOPMENT OF MECHANICAL 3D STANDARD PARTS LIBRARY
Wu Yang-dong; Xie Qing-sheng; Qi Guo-ning; Lu Yu-jun
technology included variant design, tabular layouts of article characteristics and parametric cad system, the method and key technology to construct parametric mechanical 3D standard parts library was introduced. Engineer could build mechanical standard part through this system automatically and improve the
Extra Dimensions: 3D and Time in PDF Documentation
Graf, Norman A.; /SLAC
2011-11-10T23:59:59.000Z
High energy physics is replete with multi-dimensional information which is often poorly represented by the two dimensions of presentation slides and print media. Past efforts to disseminate such information to a wider audience have failed for a number of reasons, including a lack of standards which are easy to implement and have broad support. Adobe's Portable Document Format (PDF) has in recent years become the de facto standard for secure, dependable electronic information exchange. It has done so by creating an open format, providing support for multiple platforms and being reliable and extensible. By providing support for the ECMA standard Universal 3D (U3D) file format in its free Adobe Reader software, Adobe has made it easy to distribute and interact with 3D content. By providing support for scripting and animation, temporal data can also be easily distributed to a wide audience. In this talk, we present examples of HEP applications which take advantage of this functionality. We demonstrate how 3D detector elements can be documented, using either CAD drawings or other sources such as GEANT visualizations as input. Using this technique, higher dimensional data, such as LEGO plots or time-dependent information can be included in PDF files. In principle, a complete event display, with full interactivity, can be incorporated into a PDF file. This would allow the end user not only to customize the view and representation of the data, but to access the underlying data itself.
3D Scanning for Biometric Identification and Verification
McShea, Daniel W.
June 2010 3D Scanning for Biometric Identification and Verification Project Leads Anselmo Lastra example the subject's face could be rapidly scanned while his or her smart-card ID is being examined, and the system could then match the scan with data on the ID); (b) identification at a secure site or even
Colloidal Inks for Directed Assembly of 3-D Periodic Structures
Lewis, Jennifer
during assembly, which simultaneously facilitated bonding and shape retention of the deposited elements the desired 3-D periodicity, places the most stringent demands on ink design. Direct-write techniques- controlled viscoelastic response; that is, they must be able to flow through a deposition nozzle
Mechanic Waves in Sand, 3d Simulations O Mouraillea,
Luding, Stefan
Mechanic Waves in Sand, 3d Simulations O Mouraillea, , W A Mulderb & S Ludinga a Particle propagation. The propagation of rotational energy in itself is studied as well. The control on the inter in granular materials. #12;Wave propagation, MD-Simulations 2 1. Introduction Sand, like other granular
, Roskilde, Denmark November 2002 #12;Abstract 3D rotor computations for the Greek Geovilogiki (GEO) 44 meter rotor equipped with 19 meters blades are performed. The lift and drag polars are extracted at five on the drag values are observed. ISBN 87-550-3141-2 ISBN 87-550-3142-0(internet) ISSN 0106-2840 Pitney Bowes
INTERACTION WITH 3D IMAGE DATA THROUGH VOLUME RENDERED VIEWS.
Pelizzari, Charles A.
, since the 3D image dataset is operated on directly and not transformed into a simple 3 #12; binary weighted compositing with gradient and depth shading. The algorithm is highly optimized for rapid rendering large aggregate computimg power present in many hospitals and laboratories. Mapping from the rendered
3D-2D ASYMPTOTIC ANALYSIS FOR MICROMAGNETIC THIN FILMS
3D-2D ASYMPTOTIC ANALYSIS FOR MICROMAGNETIC THIN FILMS Classification: 35E99, 35M10, 49J45, 74K35. Keywords: -limit, thin films, micromagnetics, relaxation; 1 1. Introduction In recent years the understanding of thin film behavior has been helped
ECG Gated Tomographic reconstruction for 3-D Rotational Coronary Angiography
Paris-Sud XI, UniversitĂ© de
imaging techniques to improve both the safety and the efficacy of coronary angiography interventions the ground for a platform dedicated to the planning and execution of percutaneous coronary inter- ventionsECG Gated Tomographic reconstruction for 3-D Rotational Coronary Angiography Yining HU, Lizhe XIE
Vacuum Compatibility of 3D-Printed Materials
Povilus, A P; Vendeiro, Z; Baquero-Ruiz, M; Fajans, J
2013-01-01T23:59:59.000Z
The fabrication fidelity and vacuum properties are tested for currently available 3D-printed materials including polyamide, glass, acrylic, and sterling silver. The silver was the only material found to be suitable to ultrahigh vacuum environments due to outgassing and sublimation observed in other materials.
TCAUP FabLab 3D PRINTING ORDER FORM
Kamat, Vineet R.
TCAUP FabLab 3D PRINTING ORDER FORM: UNIQ NAME: Zcorp 400/310 10"x 8"x 8" ABS 8"x 8"x 12" or 10"x://www.taubmancollege.umich.edu/digital_tech/digital_fablab/ * ZCorp members below .125" are printed at student's own risk and expense. (reasonable .125"breakage
3D Measurements in Images using CAD Models George Vosselman
Vosselman, George
is therefore subject of research at many institutes. Whereas efforts to fully automate the process of building the alignment. 1 Introduction Future geographical information systems will contain 3D and highly structured extraction show good progress [2, 5], it is clear that under many circumstances automation is extremely
Propagation Beam Consideration for 3D THz Computed Tomography
Boyer, Edmond
Propagation Beam Consideration for 3D THz Computed Tomography B. Recur, 1, J.P. Guillet, 2 I. Manek, "Refraction losses in terahertz computed tomography," Opt. Commun. 283, 20502055 (2010). 8. S. Nadar, H of the beam propagation is developed according to the physical properties of THz waves used in THz computed
Scatterplot3d an R package for Visualizing Multivariate Data
Gotelli, Nicholas J.
of multivariate data in a three dimensional space. R itself is"A Language and Environment for Statistical Comput Data. Journal of Statistical Software 8(11), 120. Abstract Scatterplot3d is an R package for the visualization of multivariate data in a three dimensional space. R is a "language for data analysis and graphics
3D Duo Binary Turbo Decoder Hardware Implementation
Timo Lehngik-emden; Matthias Alles; Norbert Wehn
Abstract: Each digital communication system needs channel coding to provide a certain quality of service. With the introducation of advanced channel codes like turbo codes and LDPC codes, error correcting near theoretical shannon limit became possible. Many applications require a low error floor in addition. The classical turbo code cannot meet this demand. Increasing the number of components codes, non-binary component codes or code concatenation are solutions for this problem, but come with a large complexity increase. In 2007 a new class of turbo codes, the 3D turbo code, was introduced by Berrou. The 3D turbo code provides a very good convergence and a large minimum distance at a low complexity. To the best of our knowledge this paper presents the first hardware implementation of a 3D turbo decoder. In addition we compare the implementation complexity of the 3D turbo decoder with the 8 and 16-state duo binary turbo decoder on FPGA and in 65nm ASIC technology.
8, 42674308, 2008 3-D retrieval of cloud
Paris-Sud XI, Université de
ACPD 8, 42674308, 2008 3-D retrieval of cloud particle profiles T. Zinner et al. Title Page.0 License. Atmospheric Chemistry and Physics Discussions Remote sensing of cloud sides of deep convection: towards a three-dimensional retrieval of cloud particle size profiles T. Zinner 1,2 , A. Marshak 1 , S
RELAP5-3D Developer Guidelines and Programming Practices
Dr. George L Mesina
2014-03-01T23:59:59.000Z
Our ultimate goal is to create and maintain RELAP5-3D as the best software tool available to analyze nuclear power plants. This begins with writing excellent programming and requires thorough testing. This document covers development of RELAP5-3D software, the behavior of the RELAP5-3D program that must be maintained, and code testing. RELAP5-3D must perform in a manner consistent with previous code versions with backward compatibility for the sake of the users. Thus file operations, code termination, input and output must remain consistent in form and content while adding appropriate new files, input and output as new features are developed. As computer hardware, operating systems, and other software change, RELAP5-3D must adapt and maintain performance. The code must be thoroughly tested to ensure that it continues to perform robustly on the supported platforms. The coding must be written in a consistent manner that makes the program easy to read to reduce the time and cost of development, maintenance and error resolution. The programming guidelines presented her are intended to institutionalize a consistent way of writing FORTRAN code for the RELAP5-3D computer program that will minimize errors and rework. A common format and organization of program units creates a unifying look and feel to the code. This in turn increases readability and reduces time required for maintenance, development and debugging. It also aids new programmers in reading and understanding the program. Therefore, when undertaking development of the RELAP5-3D computer program, the programmer must write computer code that follows these guidelines. This set of programming guidelines creates a framework of good programming practices, such as initialization, structured programming, and vector-friendly coding. It sets out formatting rules for lines of code, such as indentation, capitalization, spacing, etc. It creates limits on program units, such as subprograms, functions, and modules. It establishes documentation guidance on internal comments. The guidelines apply to both existing and new subprograms. They are written for both FORTRAN 77 and FORTRAN 95. The guidelines are not so rigorous as to inhibit a programmer’s unique style, but do restrict the variations in acceptable coding to create sufficient commonality that new readers will find the coding in each new subroutine familiar. It is recognized that this is a “living” document and must be updated as languages, compilers, and computer hardware and software evolve.
Design of 3D eye-safe middle range vibrometer
Polulyakh, Valeriy [Advanced Data Security, 1933 O'Toole Way, San Jose, CA 95131 (United States); Poutivski, Iouri [Terimber Corporation, 2456 Homewood Drive, San Jose, CA 95128, USA and Facebook Inc, 1601 Willow Road, Menlo Park, CA 94025 (United States)
2014-05-27T23:59:59.000Z
Laser Doppler Vibrometer and Range Meter (3D-MRV) is designed for middle range distances [1–100 meters]. 3D-MRV combines more than one laser in one device for a simultaneous real time measuring the distance and movement of the targets. The first laser has a short pulse (t?30psec) and low energy (E?200nJ) for distance measurement and the second one is a CW (continuous wave) single frequency laser for the velocity measurement with output power (P?30mW). Both lasers perform on the eye-safe wavelength 1.5 ?m. 3D-MRV uses the same mono-static optical transmitting and receiving channel for both lasers including an output telescope and a scanning angular system. 3D-MRV has an optical polarization switch to combine linear polarized laser beams from two lasers into one optical channel. The laser beams from both lasers by turns illuminate the target and the scattered laser radiation is collected by the telescope on a photo detector. The electrical signal from photo detector is used for measuring the distance to the target and its movement. For distance measurement the time of flight method is employed. For targets movement the optical heterodyne method is employed. The received CW laser radiation is mixed on a photo detector with the frequency-shifted laser radiation that is taken from CW laser and passed through an acousto-optic cell. The electrical signal from a photo detector on the difference frequency and phase has information about movement of the scattered targets. 3D-MVR may be used for the real time picturing of vibration of the extensive targets like bridges or aircrafts.
A fast algorithm for gamma evaluation in 3D
Wendling, Markus; Zijp, Lambert J.; McDermott, Leah N.; Smit, Ewoud J.; Sonke, Jan-Jakob; Mijnheer, Ben J.; Herk, Marcel van [Department of Radiation Oncology, Netherlands Cancer Institute - Antoni van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX Amsterdam (Netherlands)
2007-05-15T23:59:59.000Z
The {gamma}-evaluation method is a tool by which dose distributions can be compared in a quantitative manner combining dose-difference and distance-to-agreement criteria. Since its introduction, the {gamma} evaluation has been used in many studies and is on the verge of becoming the preferred dose distribution comparison method, particularly for intensity-modulated radiation therapy (IMRT) verification. One major disadvantage, however, is its long computation time, which especially applies to the comparison of three-dimensional (3D) dose distributions. We present a fast algorithm for a full 3D {gamma} evaluation at high resolution. Both the reference and evaluated dose distributions are first resampled on the same grid. For each point of the reference dose distribution, the algorithm searches for the best point of agreement according to the {gamma} method in the evaluated dose distribution, which can be done at a subvoxel resolution. Speed, computer memory efficiency, and high spatial resolution are achieved by searching around each reference point with increasing distance in a sphere, which has a radius of a chosen maximum search distance and is interpolated 'on-the-fly' at a chosen sample step size. The smaller the sample step size and the larger the differences between the dose distributions, the longer the {gamma} evaluation takes. With decreasing sample step size, statistical measures of the 3D {gamma} distribution converge. Two clinical examples were investigated using 3% of the prescribed dose as dose-difference and 0.3 cm as distance-to-agreement criteria. For 0.2 cm grid spacing, the change in {gamma} indices was negligible below a sample step size of 0.02 cm. Comparing the full 3D {gamma} evaluation and slice-by-slice 2D {gamma} evaluations ('2.5D') for these clinical examples, the {gamma} indices improved by searching in full 3D space, with the average {gamma} index decreasing by at least 8%.
North Carolina at Chapel Hill, University of
An Algorithm for Computing Customized 3D Printed Implants with Curvature Constrained Channels results in 3D printing and steerable needle motion planning to create customized implants containing
Development of 3D Simulation Training and Testing for Home Energy...
Development of 3D Simulation Training and Testing for Home Energy Score Assessor Candidates Development of 3D Simulation Training and Testing for Home Energy Score Assessor...
Realtime Constraint-Based Cinematography for Complex Interactive 3D Worlds
Lester, James C.
Realtime Constraint-Based Cinematography for Complex Interactive 3D Worlds William H. Bares, creates cinematic goals for a constraint- based realtime 3D virtual cinematography plan- ner
The Future of Manufacturing Takes Shape: 3D Printed Car on Display...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Lead, Advanced Manufacturing Office Additive manufacturing - often referred to as 3D printing - is a revolutionary way to design and build products. Until now, 3D printing has...
Quantum Field Theory & Gravity
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Quantum Field Theory & Gravity Quantum Field Theory & Gravity Understanding discoveries at the Energy, Intensity, and Cosmic Frontiers Get Expertise Rajan Gupta (505) 667-7664...
Parallel 3-D S{sub N} performance for DANTSYS/MPI on the Cray T3D
Baker, R.S.; Alcouffe, R.E. [Los Alamos National Lab., NM (United States). Transport Methods Group
1997-05-01T23:59:59.000Z
A data parallel version of the 3-D transport solver in DANTSYS has been in use on the SIMD CM-200`s at LANL since 1994. This version typically obtains grind times of 150--200 nanoseconds on a 2,048 PE CM-200. The authors have now implemented a new message passing parallel version of DANTSYS, referred to as DANTSYS/MPI, on the 512 PE Cray T3D at Los Alamos. By taking advantage of the SPMD architecture of the Cray T3D, as well as its low latency communications network, they have managed to achieve grind times of less than 10 nanoseconds on real problems. DANTSYS/MPI is fully accelerated using DSA on both the inner and outer iterations. This paper describes the implementation of DANTSYS/MPI on the Cray T3D, and presents two simple performance models for the transport sweep which accurately predict the grind time as a function of the number of PE`s and problem size, or scalability.
Three-dimensional electromagnetic modeling and inversion on massively parallel computers
Newman, G.A.; Alumbaugh, D.L. [Sandia National Labs., Albuquerque, NM (United States). Geophysics Dept.
1996-03-01T23:59:59.000Z
This report has demonstrated techniques that can be used to construct solutions to the 3-D electromagnetic inverse problem using full wave equation modeling. To this point great progress has been made in developing an inverse solution using the method of conjugate gradients which employs a 3-D finite difference solver to construct model sensitivities and predicted data. The forward modeling code has been developed to incorporate absorbing boundary conditions for high frequency solutions (radar), as well as complex electrical properties, including electrical conductivity, dielectric permittivity and magnetic permeability. In addition both forward and inverse codes have been ported to a massively parallel computer architecture which allows for more realistic solutions that can be achieved with serial machines. While the inversion code has been demonstrated on field data collected at the Richmond field site, techniques for appraising the quality of the reconstructions still need to be developed. Here it is suggested that rather than employing direct matrix inversion to construct the model covariance matrix which would be impossible because of the size of the problem, one can linearize about the 3-D model achieved in the inverse and use Monte-Carlo simulations to construct it. Using these appraisal and construction tools, it is now necessary to demonstrate 3-D inversion for a variety of EM data sets that span the frequency range from induction sounding to radar: below 100 kHz to 100 MHz. Appraised 3-D images of the earth`s electrical properties can provide researchers opportunities to infer the flow paths, flow rates and perhaps the chemistry of fluids in geologic mediums. It also offers a means to study the frequency dependence behavior of the properties in situ. This is of significant relevance to the Department of Energy, paramount to characterizing and monitoring of environmental waste sites and oil and gas exploration.
3-D MAPPING TECHNOLOGIES FOR HIGH LEVEL WASTE TANKS
Marzolf, A.; Folsom, M.
2010-08-31T23:59:59.000Z
This research investigated four techniques that could be applicable for mapping of solids remaining in radioactive waste tanks at the Savannah River Site: stereo vision, LIDAR, flash LIDAR, and Structure from Motion (SfM). Stereo vision is the least appropriate technique for the solids mapping application. Although the equipment cost is low and repackaging would be fairly simple, the algorithms to create a 3D image from stereo vision would require significant further development and may not even be applicable since stereo vision works by finding disparity in feature point locations from the images taken by the cameras. When minimal variation in visual texture exists for an area of interest, it becomes difficult for the software to detect correspondences for that object. SfM appears to be appropriate for solids mapping in waste tanks. However, equipment development would be required for positioning and movement of the camera in the tank space to enable capturing a sequence of images of the scene. Since SfM requires the identification of distinctive features and associates those features to their corresponding instantiations in the other image frames, mockup testing would be required to determine the applicability of SfM technology for mapping of waste in tanks. There may be too few features to track between image frame sequences to employ the SfM technology since uniform appearance may exist when viewing the remaining solids in the interior of the waste tanks. Although scanning LIDAR appears to be an adequate solution, the expense of the equipment ($80,000-$120,000) and the need for further development to allow tank deployment may prohibit utilizing this technology. The development would include repackaging of equipment to permit deployment through the 4-inch access ports and to keep the equipment relatively uncontaminated to allow use in additional tanks. 3D flash LIDAR has a number of advantages over stereo vision, scanning LIDAR, and SfM, including full frame time-of-flight data (3D image) collected with a single laser pulse, high frame rates, direct calculation of range, blur-free images without motion distortion, no need for precision scanning mechanisms, ability to combine 3D flash LIDAR with 2D cameras for 2D texture over 3D depth, and no moving parts. The major disadvantage of the 3D flash LIDAR camera is the cost of approximately $150,000, not including the software development time and repackaging of the camera for deployment in the waste tanks.
NORTH HILL CREEK 3-D SEISMIC EXPLORATION PROJECT
Marc T. Eckels; David H. Suek; Denise H. Harrison; Paul J. Harrison
2004-05-06T23:59:59.000Z
Wind River Resources Corporation (WRRC) received a DOE grant in support of its proposal to acquire, process and interpret fifteen square miles of high-quality 3-D seismic data on non-allotted trust lands of the Uintah and Ouray (Ute) Indian Reservation, northeastern Utah, in 2000. Subsequent to receiving notice that its proposal would be funded, WRRC was able to add ten square miles of adjacent state and federal mineral acreage underlying tribal surface lands by arrangement with the operator of the Flat Rock Field. The twenty-five square mile 3-D seismic survey was conducted during the fall of 2000. The data were processed through the winter of 2000-2001, and initial interpretation took place during the spring of 2001. The initial interpretation identified multiple attractive drilling prospects, two of which were staked and permitted during the summer of 2001. The two initial wells were drilled in September and October of 2001. A deeper test was drilled in June of 2002. Subsequently a ten-well deep drilling evaluation program was conducted from October of 2002 through March 2004. The present report discusses the background of the project; design and execution of the 3-D seismic survey; processing and interpretation of the data; and drilling, completion and production results of a sample of the wells drilled on the basis of the interpreted survey. Fifteen wells have been drilled to test targets identified on the North Hill Creek 3-D Seismic Survey. None of these wildcat exploratory wells has been a dry hole, and several are among the best gas producers in Utah. The quality of the data produced by this first significant exploratory 3-D survey in the Uinta Basin has encouraged other operators to employ this technology. At least two additional 3-D seismic surveys have been completed in the vicinity of the North Hill Creek Survey, and five additional surveys are being planned for the 2004 field season. This project was successful in finding commercial oil, natural gas and natural gas liquids production on a remote part of the Uintah & Ouray Reservation. Much of the natural gas and natural gas liquids are being produced from the Wingate Formation, which to our knowledge has never produced commercially anywhere. Another large percentage of the natural gas is being produced from the Entrada Formation which has not previously produced in this part of the Uinta Basin. In all, at least nine geologic formations are contributing hydrocarbons to these wells. This survey has clearly established the fact that high-quality data can be obtained in this area, despite the known obstacles.
Computerized fluid movement mapping and 3-D visualization
Al-Awami, A.A.; Poore, J.W. [Saudi Aramco, Dhahran (Saudi Arabia); Sizer, J.P.
1995-11-01T23:59:59.000Z
Most of the fieldwide fluid movement monitoring techniques under utilize available computer resources. This paper discusses an approach reservoir management engineers use to monitor fluid movement in reservoirs with a multitude of wells. This approach allows the engineer to maintain up-to-date fluid movement studies and incorporate the latest information from data acquisition programs into the day to day decision-making process. The approach uses several in-house database applications and makes extensive use of commercially available software products to generate and visualize cross-sections, maps, and 3-d models. This paper reviews the computerized procedures to create cross-sections that display the current fluid contacts overlaying the lithology. It also reviews the mapping procedures nd presents examples of water encroachment maps by layer at specific time periods. 3-D geologic modeling software greatly enhances the visualization of the reservoir. This software can also be used to interpret and model fluid movement, given the appropriate engineering constraints.
Bootstrapping Mixed Correlators in the 3D Ising Model
Filip Kos; David Poland; David Simmons-Duffin
2014-06-18T23:59:59.000Z
We study the conformal bootstrap for systems of correlators involving non-identical operators. The constraints of crossing symmetry and unitarity for such mixed correlators can be phrased in the language of semidefinite programming. We apply this formalism to the simplest system of mixed correlators in 3D CFTs with a $\\mathbb{Z}_2$ global symmetry. For the leading $\\mathbb{Z}_2$-odd operator $\\sigma$ and $\\mathbb{Z}_2$-even operator $\\epsilon$, we obtain numerical constraints on the allowed dimensions $(\\Delta_\\sigma, \\Delta_\\epsilon)$ assuming that $\\sigma$ and $\\epsilon$ are the only relevant scalars in the theory. These constraints yield a small closed region in $(\\Delta_\\sigma, \\Delta_\\epsilon)$ space compatible with the known values in the 3D Ising CFT.
3-D laser patterning process utilizing horizontal and vertical patterning
Malba, Vincent (Livermore, CA); Bernhardt, Anthony F. (Berkeley, CA)
2000-01-01T23:59:59.000Z
A process which vastly improves the 3-D patterning capability of laser pantography (computer controlled laser direct-write patterning). The process uses commercially available electrodeposited photoresist (EDPR) to pattern 3-D surfaces. The EDPR covers the surface of a metal layer conformally, coating the vertical as well as horizontal surfaces. A laser pantograph then patterns the EDPR, which is subsequently developed in a standard, commercially available developer, leaving patterned trench areas in the EDPR. The metal layer thereunder is now exposed in the trench areas and masked in others, and thereafter can be etched to form the desired pattern (subtractive process), or can be plated with metal (additive process), followed by a resist stripping, and removal of the remaining field metal (additive process). This improved laser pantograph process is simpler, faster, move manufacturable, and requires no micro-machining.
Sculplexity: Sculptures of Complexity using 3D printing
Reiss, D S; Evans, T S
2014-01-01T23:59:59.000Z
We show how to convert models of complex systems such as 2D cellular automata into a 3D printed object. Our method takes into account the limitations inherent to 3D printing processes and materials. Our approach automates the greater part of this task, bypassing the use of CAD software and the need for manual design. As a proof of concept, a physical object representing a modified forest fire model was successfully printed. Automated conversion methods similar to the ones developed here can be used to create objects for research, for demonstration and teaching, for outreach, or simply for aesthetic pleasure. As our outputs can be touched, they may be particularly useful for those with visual disabilities.
Fast Freehand Acquisition of 3D Objects and their Visualization
Peters, Gabriele
-world objects in a large number of fields of applications, such as the entertainment industry, design], and the application of structured light [3]. Image-based methods are, e.g., stereo vi- sion or multi-camera techniques://www.inf.fh-dortmund.de/personen/professoren/peters/ Abstract. In many applications 3d models of real-world objects are re- quired. We introduce a tool which
Mapping the 3-D Dark Matter potential with weak shear
D. J. Bacon; A. N. Taylor
2002-12-11T23:59:59.000Z
We investigate the practical implementation of Taylor's (2002) 3-dimensional gravitational potential reconstruction method using weak gravitational lensing, together with the requisite reconstruction of the lensing potential. This methodology calculates the 3-D gravitational potential given a knowledge of shear estimates and redshifts for a set of galaxies. We analytically estimate the noise expected in the reconstructed gravitational field, taking into account the uncertainties associated with a finite survey, photometric redshift uncertainty, redshift-space distortions, and multiple scattering events. In order to implement this approach for future data analysis, we simulate the lensing distortion fields due to various mass distributions. We create catalogues of galaxies sampling this distortion in three dimensions, with realistic spatial distribution and intrinsic ellipticity for both ground-based and space-based surveys. Using the resulting catalogues of galaxy position and shear, we demonstrate that it is possible to reconstruct the lensing and gravitational potentials with our method. For example, we demonstrate that a typical ground-based shear survey with redshift limit z=1 and photometric redshifts with error Delta z=0.05 is directly able to measure the 3-D gravitational potential for mass concentrations >10^14 M_\\odot between 0.1
3D, Flash, Induced Current Readout for Silicon Sensors
Parker, Sherwood I.
2014-06-07T23:59:59.000Z
A new method for silicon microstrip and pixel detector readout using (1) 65 nm-technology current amplifers which can, for the first time with silicon microstrop and pixel detectors, have response times far shorter than the charge collection time (2) 3D trench electrodes large enough to subtend a reasonable solid angle at most track locations and so have adequate sensitivity over a substantial volume of pixel, (3) induced signals in addition to, or in place of, collected charge
Multimessengers from 3D Core-Collapse Supernovae
Yakunin, Konstantin N; Mezzacappa, Anthony; Messer, O E Bronson; Lentz, Eric J; Bruenn, Stephen W; Hix, W Rafael; Harris, J Austin
2015-01-01T23:59:59.000Z
We present gravitational wave and neutrino signatures obtained in our first principle 3D core-collapse supernova simulation of 15M non-rotating progenitor with Chimera code. Observations of neutrinos emitted by the forming neutron star, and gravitational waves, which are produced by hydrodynamic instabilities is the only way to get direct information about the supernova engine. Both GW and neutrino signals show different phases of supernova evolution.
3D Object Digitization: Topology Preserving Reconstruction Peer Stelldinger
Hamburg,.Universität
for reconstructing the object from the set of included sampling points is the 3D generalization of #12;the 2D Gauss digitization (see [4]) which has been used by Gauss to compute the area of discs. 3 Digital Reconstruction of r-Regular Sets 1 2 3 4 5 6 7 8 9 10 11 12 13 14 8a 8b Figure 2. There are 14 different cases of canonical
Labeling 3D scenes for Personal Assistant Robots
Koppula, Hema Swetha; Joachims, Thorsten; Saxena, Ashutosh
2011-01-01T23:59:59.000Z
Inexpensive RGB-D cameras that give an RGB image together with depth data have become widely available. We use this data to build 3D point clouds of a full scene. In this paper, we address the task of labeling objects in this 3D point cloud of a complete indoor scene such as an office. We propose a graphical model that captures various features and contextual relations, including the local visual appearance and shape cues, object co-occurrence relationships and geometric relationships. With a large number of object classes and relations, the model's parsimony becomes important and we address that by using multiple types of edge potentials. The model admits efficient approximate inference, and we train it using a maximum-margin learning approach. In our experiments over a total of 52 3D scenes of homes and offices (composed from about 550 views, having 2495 segments labeled with 27 object classes), we get a performance of 84.06% in labeling 17 object classes for offices, and 73.38% in labeling 17 object classe...
Particle trajectories and acceleration during 3D fan reconnection
S. Dalla; P. K. Browning
2008-11-07T23:59:59.000Z
Context. The primary energy release in solar flares is almost certainly due to magnetic reconnection, making this a strong candidate as a mechanism for particle acceleration. While particle acceleration in 2D geometries has been widely studied, investigations in 3D are a recent development. Two main classes of reconnection regimes at a 3D magnetic null point have been identified: fan and spine reconnection Aims. Here we investigate particle trajectories and acceleration during reconnection at a 3D null point, using a test particle numerical code, and compare the efficiency of the fan and spine regimes in generating an energetic particle population. Methods. We calculated the time evolution of the energy spectra. We discuss the geometry of particle escape from the two configurations and characterise the trapped and escaped populations. Results. We find that fan reconnection is less efficent than spine reconnection in providing seed particles to the region of strong electric field where acceleration is possible. The establishment of a steady-state spectrum requires approximately double the time in fan reconnection. The steady-state energy spectrum at intermediate energies (protons 1 keV to 0.1 MeV) is comparable in the fan and spine regimes. While in spine reconnection particle escape takes place in two symmetric jets along the spine, in fan reconnection no jets are produced and particles escape in the fan plane, in a ribbon-like structure.
Radiation in a Closed 3-D Universe Reveals its Present Geometry and its Past Evolution
Charles B. Leffert
2001-06-19T23:59:59.000Z
In previous papers, predictions of the new "Spatial Condensation (SC-)" cosmological model were presented on the (1) foundations, (2) new source of gravity, and (3) large-scale structure. In this paper predictions will include new physical features that are due mostly to the postulated geometry of our closed 3-D universe. Knowledge of the past universe is obtained from its many types of radiation that travel to our instruments on great circles of our expanding 3-sphere. Adding the fourth spatial dimension greatly increases our understanding of the concepts of emission and reception distances of the sources and 4-D trajectory of the radiation. In a closed expanding 3-D universe, most of the radiation from a distant bright source at Ze can travel halfway around the universe and be refocused as a "virtual source" at Zv ~1.5 where some of the re-diverging radiation arrives later to our instruments. With the added fourth dimension, the SC-model makes some spectacular predictions for these virtual sources. Indeed, the CBR becomes a re-focused "backside" microwave radiation with its structure amplified in size and decreased in luminosity by a factor ~ 1/350. "Viewed" in the optical from a direction opposite the CBR, the same, but more evolved, structure at "virtual Zsame" would certainly fix the geometry and size of our universe. Virtual sources are also added radiation to the diffuse background of X-rays and infrared. The CBR dipole suggests a preferred reference frame. Reflected light signals in a non-accelerated frame show, in principle, the moving frame could be brought to rest in the comoving frame.
Simms, S.C. (Saudi Aramco, Dhahran (Saudi Arabia))
1993-09-01T23:59:59.000Z
A 425-km[sup 2], three-dimensional (3-D) seismic survey was shot in 1992 over one of the recently discovered oil fields in central Saudi Arabia. The primary objective of this survey was to provide stratigraphic control within a complex fluvial reservoir. The Permian age reservoir is a multistory, multilateral sequence of sandstones interbedded with nonproductive mudstones and siltstones. The seismic data were integrated with well control from over 50 wells to produce a 3-D geologic model of the reservoir. Numerous examples of the seismic and well data are presented in this case history. Stratigraphic cross sections through the wells illustrate that the complex nature of the reservoir and seismic sections through these wells show good correlation between seismic character and stratigraphy. Meandering channels and massive siltstone/mudstone bodies are clearly visible on seismic horizon slices and time slices. Faulting is evident on both seismic section at times slices. Acoustic impedance sections produced from both forward and inverse modeling of the seismic data are compared with geologic models of porosity and lithology based on well control alone. Good correlation between acoustic impedance and porosity/lithology allow the use of the seismic data to guide the model between well locations. A geostatistical approach was used to interpolate between well control using the inverted seismic as [open quotes]soft data.[close quotes] 3-D visualization of the geological model illustrates increasing complexity from well control only to an integrated model.
Spheree: A 3D Perspective-Corrected Interactive Spherical Scalable Display Ferreira, F.q
British Columbia, University of
models can be exported or printed on a 3D printer. Other related 3D displays include: 1. pCubee [StavnessSpheree: A 3D Perspective-Corrected Interactive Spherical Scalable Display Ferreira, F.q , Cabral & U of British Columbia (a) (b) (c) (d) Figure 1: (a) A snowglobe; (b) a fish-tank animation; (c) a 3D
3D Graph Visualization with the Oculus Rift Virtual Graph Reality
Wismath, Stephen
reality environment such as a CAVE, or · printed as a physical model with a 3D printer. Early studies3D Graph Visualization with the Oculus Rift Virtual Graph Reality Farshad Barahimi, Stephen Wismath regarding three- dimensional (3D) representations of graphs. However, the actual usefulness of such 3D
3D Fingerprint Phantoms Sunpreet S. Arora, Kai Cao and Anil K. Jain
) printing the 3D fingerprint phantoms using a commodity 3D printer. Preliminary experimental results show3D Fingerprint Phantoms Sunpreet S. Arora, Kai Cao and Anil K. Jain Department of Computer Science, we propose creating 3D fin- gerprint phantoms (phantoms or imaging phantoms are specially designed
Construction of suitable weak solutions for the 3D incompressible NSEs
Guermond, Jean-Luc
Construction of suitable weak solutions for the 3D incompressible NSEs Jean-Luc Guermond Department-Luc Guermond Construction of suitable weak solutions for the 3D NSEs #12;Outline 1 BASIC FACTS ABOUT THE 3D NSE Jean-Luc Guermond Construction of suitable weak solutions for the 3D NSEs #12;Outline 1 BASIC FACTS
Stereo Matching and 3D Visualization for Gamma-Ray Cargo Inspection Zhigang Zhu*ab
Zhu, Zhigang
Stereo Matching and 3D Visualization for Gamma-Ray Cargo Inspection Zhigang Zhu*ab , Yu-Chi Hubc visualization issues are studied for a linear pushbroom stereo model built for 3D gamma-ray (or x-ray) cargo results are presented for real gamma-ray images of a 3D cargo container and the objects inside. The 3D
Paris-Sud XI, UniversitĂ© de
1 Rubrique : Tectonique ModĂ©lisation gĂ©omĂ©trique 3D des granites StĂ©phaniens du massif du Pelvoux (Alpes, France). 3D geometrical modelling of Stephanian granite from the Pelvoux massif (French Alps, granite, modĂ©lisation 3D, CarbonifĂ¨re. Key words : Alps, Granite, 3D modelling, Carbonifere
3 July 2003 HIRES3D -ITC Research Seminar -Robert Hack 1 HIGH RESOLUTION REMOTE SENSING
Hack, Robert
3 July 2003 HIRES3D - ITC Research Seminar - Robert Hack 1 HIRES3D HIGH RESOLUTION REMOTE SENSING FOR 3D GROUND MODELING AND CLASSIFICATION ITC Research Seminar, 3 July 2003 Robert Hack International Institute for Geoinformation Sciences and Earth Observation (ITC) #12;3 July 2003 HIRES3D - ITC Research
InvenTcl: A Fast Prototyping Environment for 3D Graphics and Multimedia Applications
British Columbia, University of
InvenTcl: A Fast Prototyping Environment for 3D Graphics and Multimedia Applications Sidney Fels1- sion of Open Inventor, a 3D graphics toolkit. To create InvenTcl, the Open Inventor toolkit is \\wrapped, easy prototyping of 3D graphics and animation, low bandwidth communication of 3D scenes and animations
Fuzzy Control for Enforcing Energy Efficiency in High-Performance 3D Systems
Coskun, Ayse
to remove the heat from 3D ICs. 3D systems are also prone to large thermal variations; e.g., cores located and DVFS-based thermal management in 3D multicore systems [28], [8], [27]. However, as power densities micro- channels (or pin-fin structures) between the tiers of a 3D stack using a pump to remove the heat
Stereoscopic Media Editing based on 3D Cinematography Principles Chun-Wei Liu1
Ouhyoung, Ming
Stereoscopic Media Editing based on 3D Cinematography Principles Chun-Wei Liu1 Tz-Huan Huang1 Ming, especially for stereoscopic media captured by consumers. This paper in- troduces 3D cinematography principles in stereoscopic media processing. 2 Principles and applications 3D cinematography principles. 3D filmmakers have
ILLUSTRATING MATHEMATICS USING 3D PRINTERS OLIVER KNILL AND ELIZABETH SLAVKOVSKY
Knill, Oliver
3D printing can help to visualize concepts and mathematical proofs. As already known to educators in ancient Greece, models allow to bring mathematics closer to the public. The new 3D printing technology that with relatively little effort. 2. 3D printing The industry of rapid prototyping and 3D printing in particular em
ILLUSTRATING MATHEMATICS USING 3D PRINTERS OLIVER KNILL AND ELIZABETH SLAVKOVSKY
Knill, Oliver
printing technology can help to visualize proofs in mathematics. This talk aims to illustrate how 3D Greece, models allows to make mathematics more accessible. The new 3D printing technology makes unmatched. 3D printers allow us to do that with relative little effort. 2. 3D printing The industry of rapid
3D tomodosimetry using long scintillating fibers: A feasibility study
Goulet, Mathieu; Archambault, Louis; Beaulieu, Luc; Gingras, Luc [Département de Physique, de Génie Physique et d’Optique et Centre de Recherche sur le cancer, Université Laval, Québec, Québec G1V 0A6, Canada, and Département de Radio-Oncologie and CRCHU de Quebec, CHU de Québec, 11 Côte du Palais, Québec, Québec G1R 2J6 (Canada)] [Département de Physique, de Génie Physique et d’Optique et Centre de Recherche sur le cancer, Université Laval, Québec, Québec G1V 0A6, Canada, and Département de Radio-Oncologie and CRCHU de Quebec, CHU de Québec, 11 Côte du Palais, Québec, Québec G1R 2J6 (Canada)
2013-10-15T23:59:59.000Z
Purpose: 3D dosimetry is recognized as an ideal for patient-specific quality assurance (QA) of highly conformal radiotherapy treatments. However, existing 3D dosimeters are not straightforward to implement in the clinic, as their read-out procedure is often tedious and their accuracy, precision, and/or sample size exhibit limitations. The purpose of this work is to develop a 3D dosimeter based on the concept of tomodosimetry inside concentric cylindrical planes using long scintillating fibers for the QA of modern radiotherapy techniques such as intensity-modulated radiation therapy (IMRT) or intensity-modulated arc therapy (IMAT).Methods: Using a model-based simulation, scintillating fibers were modeled on three concentric cylindrical planes of radii 2.5, 5.0, and 7.5 cm, inside a 10 cm radius water-equivalent cylinder phantom. The phantom was set to rotate around its central axis, made parallel to the linac gantry axis of rotation. Light acquisitions were simulated using the calculated dose from the treatment planning software and reconstructed in each cylindrical plane at a resolution of 1 mm{sup 2} using a total-variation minimization iterative reconstruction algorithm. The 3D dose was then interpolated from the reconstructed cylindrical plane doses at a resolution of 1 mm{sup 3}. Different scintillating fiber patterns were compared by varying the angle of each fiber in its cylindrical plane and introducing a light-tight cut in each fiber. The precision of the reconstructed cylindrical dose distribution was evaluated using a Poisson modeling of the acquired light signals and the accuracy of the interpolated 3D dose was evaluated using an IMRT clinical plan for a prostate case.Results: Straight scintillating fiber patterns with light-tight cuts were the most accurate in cylindrical dose reconstruction, showing less than 0.5 mm distance-to-agreement in dose gradients and a mean local dose difference of less than 0.2% in the high dose region for a 10 × 10 cm{sup 2} field. The precision attained with this fiber configuration was less than 0.9% in the high dose, low gradient region of an IMRT segment for light acquisitions of 0.1 MU over a 360 degree rotation of the cylinder phantom. 3D dose interpolation for the IMRT clinical plan yielded an overall dose difference with the reference input of less than 1%, except in high dose gradients.Conclusions: Using long scintillating fibers inside rotating, concentric cylindrical planes, the authors demonstrate that their tomodosimetry method has the potential for high resolution, precise, and accurate 3D dosimetry. Moreover, because of its water-equivalence and rotational symmetry, this design should find interesting application for both treatment QA and machine commissioning.
Streamlining of the RELAP5-3D Code
Mesina, George L; Hykes, Joshua; Guillen, Donna Post
2007-11-01T23:59:59.000Z
RELAP5-3D is widely used by the nuclear community to simulate general thermal hydraulic systems and has proven to be so versatile that the spectrum of transient two-phase problems that can be analyzed has increased substantially over time. To accommodate the many new types of problems that are analyzed by RELAP5-3D, both the physics and numerical methods of the code have been continuously improved. In the area of computational methods and mathematical techniques, many upgrades and improvements have been made decrease code run time and increase solution accuracy. These include vectorization, parallelization, use of improved equation solvers for thermal hydraulics and neutron kinetics, and incorporation of improved library utilities. In the area of applied nuclear engineering, expanded capabilities include boron and level tracking models, radiation/conduction enclosure model, feedwater heater and compressor components, fluids and corresponding correlations for modeling Generation IV reactor designs, and coupling to computational fluid dynamics solvers. Ongoing and proposed future developments include improvements to the two-phase pump model, conversion to FORTRAN 90, and coupling to more computer programs. This paper summarizes the general improvements made to RELAP5-3D, with an emphasis on streamlining the code infrastructure for improved maintenance and development. With all these past, present and planned developments, it is necessary to modify the code infrastructure to incorporate modifications in a consistent and maintainable manner. Modifying a complex code such as RELAP5-3D to incorporate new models, upgrade numerics, and optimize existing code becomes more difficult as the code grows larger. The difficulty of this as well as the chance of introducing errors is significantly reduced when the code is structured. To streamline the code into a structured program, a commercial restructuring tool, FOR_STRUCT, was applied to the RELAP5-3D source files. The methodology employed follows Dijkstra's structured programming paradigm, which is based on splitting programs into sub-sections, each with single points of entry and exit and in which control is passed downward through the structure with no unconditional branches to higher levels. GO TO commands are typically avoided, since they alter the flow and control of a program’s execution by allowing a jump from one place in the routine to another. The restructuring of RELAP5-3D subroutines is complicated by several issues. The first is use of code other than standard FORTRAN77. The second is restructuring limitations of FOR_STRUCT. The third is existence of pre-compiler directives and the complication of nested directives. Techniques were developed to overcome all these difficulties and more and these are reported. By implementing these developments, all subroutines of RELAP were restructured. Measures of code improvement relative to maintenance and development are presented.
Uncertainty Analysis of RELAP5-3D
Alexandra E Gertman; Dr. George L Mesina
2012-07-01T23:59:59.000Z
As world-wide energy consumption continues to increase, so does the demand for the use of alternative energy sources, such as Nuclear Energy. Nuclear Power Plants currently supply over 370 gigawatts of electricity, and more than 60 new nuclear reactors have been commissioned by 15 different countries. The primary concern for Nuclear Power Plant operation and lisencing has been safety. The safety of the operation of Nuclear Power Plants is no simple matter- it involves the training of operators, design of the reactor, as well as equipment and design upgrades throughout the lifetime of the reactor, etc. To safely design, operate, and understand nuclear power plants, industry and government alike have relied upon the use of best-estimate simulation codes, which allow for an accurate model of any given plant to be created with well-defined margins of safety. The most widely used of these best-estimate simulation codes in the Nuclear Power industry is RELAP5-3D. Our project focused on improving the modeling capabilities of RELAP5-3D by developing uncertainty estimates for its calculations. This work involved analyzing high, medium, and low ranked phenomena from an INL PIRT on a small break Loss-Of-Coolant Accident as wall as an analysis of a large break Loss-Of- Coolant Accident. Statistical analyses were performed using correlation coefficients. To perform the studies, computer programs were written that modify a template RELAP5 input deck to produce one deck for each combination of key input parameters. Python scripting enabled the running of the generated input files with RELAP5-3D on INL’s massively parallel cluster system. Data from the studies was collected and analyzed with SAS. A summary of the results of our studies are presented.
3D J-Integral Capability in Grizzly
Benjamin Spencer; Marie Backman; Pritam Chakraborty; William Hoffman
2014-09-01T23:59:59.000Z
This report summarizes work done to develop a capability to evaluate fracture contour J-Integrals in 3D in the Grizzly code. In the current fiscal year, a previously-developed 2D implementation of a J-Integral evaluation capability has been extended to work in 3D, and to include terms due both to mechanically-induced strains and due to gradients in thermal strains. This capability has been verified against a benchmark solution on a model of a curved crack front in 3D. The thermal term in this integral has been verified against a benchmark problem with a thermal gradient. These developments are part of a larger effort to develop Grizzly as a tool that can be used to predict the evolution of aging processes in nuclear power plant systems, structures, and components, and assess their capacity after being subjected to those aging processes. The capabilities described here have been developed to enable evaluations of Mode- stress intensity factors on axis-aligned flaws in reactor pressure vessels. These can be compared with the fracture toughness of the material to determine whether a pre-existing flaw would begin to propagate during a pos- tulated pressurized thermal shock accident. This report includes a demonstration calculation to show how Grizzly is used to perform a deterministic assessment of such a flaw propagation in a degraded reactor pressure vessel under pressurized thermal shock conditions. The stress intensity is calculated from J, and the toughness is computed using the fracture master curve and the degraded ductile to brittle transition temperature.
Abu-Mostafa, Yaser S.
by means of the "3D printing" devices used in mechanical rapid prototyping. Another one is that 3D objects
Convergence of Ginzburg-Landau functionals in 3-d superconductivity
Sisto Baldo; Robert L. Jerrard; Giandomenico Orlandi; Mete Soner
2011-02-23T23:59:59.000Z
In this paper we consider the asymptotic behavior of the Ginzburg- Landau model for superconductivity in 3-d, in various energy regimes. We rigorously derive, through an analysis via {\\Gamma}-convergence, a reduced model for the vortex density, and we deduce a curvature equation for the vortex lines. In a companion paper, we describe further applications to superconductivity and superfluidity, such as general expressions for the first critical magnetic field H_{c1}, and the critical angular velocity of rotating Bose-Einstein condensates.
Customizing mesoscale self-assembly with 3D printing
M. Poty; G. Lumay; N. Vandewalle
2013-10-17T23:59:59.000Z
Self-assembly due to capillary forces is a common method for generating 2D mesoscale structures from identical floating particles at the liquid-air interface. Designing building blocks to obtain a desired mesoscopic structure is a scientific challenge. We show herein that it is possible to shape the particles with a low cost 3D printer, for composing specific mesoscopic structures. Our method is based on the creation of capillary multipoles inducing either attractive or repulsive forces. Since capillary interactions can be downscaled, our method opens new ways to low cost microfabrication.
A non-conforming 3D spherical harmonic transport solver
Van Criekingen, S. [Commissariat a l'Energie Atomique CEA-Saclay, DEN/DM2S/SERMA/LENR Bat 470, 91191 Gif-sur-Yvette, Cedex (France)
2006-07-01T23:59:59.000Z
A new 3D transport solver for the time-independent Boltzmann transport equation has been developed. This solver is based on the second-order even-parity form of the transport equation. The angular discretization is performed through the expansion of the angular neutron flux in spherical harmonics (PN method). The novelty of this solver is the use of non-conforming finite elements for the spatial discretization. Such elements lead to a discontinuous flux approximation. This interface continuity requirement relaxation property is shared with mixed-dual formulations such as the ones based on Raviart-Thomas finite elements. Encouraging numerical results are presented. (authors)
Mesh component design and software integration within SUMAA3d.
Freitag, L.
1999-01-13T23:59:59.000Z
The requirements of distributed-memory applications that use mesh management software tools are diverse, and building software that meets these requirements represents a considerable challenge. In this paper we discuss design requirements for a general, component approach for mesh management for use within the context of solving PDE applications on parallel computers. We describe recent efforts with the SUMAA3d package motivated by a component-based approach and show how these efforts have considerably improved both the flexibility and the usability of this software.
Helmholtz Theorem for Differential Forms in 3-D Euclidean Space
Jose G. Vargas
2014-04-20T23:59:59.000Z
There are significant differences between Helmholtz and Hodge's decomposition theorems, but both share a common flavor. This paper is a first step to bring them together. We here produce Helmholtz theorems for differential 1-forms and 2-forms in 3-D Euclidean space. We emphasize their common structure in order to facilitate the understanding of another paper, soon to be made public, where a Helmholtz theorem for arbitrary differential forms in arbitrary Euclidean space is presented and which allows one to connect (actually to derive from it) an improvement of Hodge's decomposition theorem.
Virtual reality 3D headset based on DMD light modulators
Bernacki, Bruce E.; Evans, Allan; Tang, Edward
2014-06-13T23:59:59.000Z
We present the design of an immersion-type 3D headset suitable for virtual reality applications based upon digital micro-mirror devices (DMD). Our approach leverages silicon micro mirrors offering 720p resolution displays in a small form-factor. Supporting chip sets allow rapid integration of these devices into wearable displays with high resolution and low power consumption. Applications include night driving, piloting of UAVs, fusion of multiple sensors for pilots, training, vision diagnostics and consumer gaming. Our design is described in which light from the DMD is imaged to infinity and the user’s own eye lens forms a real image on the user’s retina.
3-D HYDRODYNAMIC MODELING IN A GEOSPATIAL FRAMEWORK
Bollinger, J; Alfred Garrett, A; Larry Koffman, L; David Hayes, D
2006-08-24T23:59:59.000Z
3-D hydrodynamic models are used by the Savannah River National Laboratory (SRNL) to simulate the transport of thermal and radionuclide discharges in coastal estuary systems. Development of such models requires accurate bathymetry, coastline, and boundary condition data in conjunction with the ability to rapidly discretize model domains and interpolate the required geospatial data onto the domain. To facilitate rapid and accurate hydrodynamic model development, SRNL has developed a pre- and post-processor application in a geospatial framework to automate the creation of models using existing data. This automated capability allows development of very detailed models to maximize exploitation of available surface water radionuclide sample data and thermal imagery.
Hanford Site - 100-HR-3-D | Department of Energy
Office of Environmental Management (EM)
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3D Printing a Classic | Department of Energy
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3D Site Response using NLSSI | Department of Energy
Office of Environmental Management (EM)
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SciTech Connect: "3d printing"
Office of Scientific and Technical Information (OSTI)
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3D Printing of nanostructured catalytic materials | The Ames Laboratory
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3D Tracking at the Nanoscale | The Ames Laboratory
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Biometrics - 3-D face analysis ... | ornl.gov
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3D Visualization of Water Transport in Ferns
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Coutinho, Alvaro L. G. A.
the viscoelastic parameters; 3D FEM analysis using High Performance Computing (parallel and vector features) to run Performance Computing. E. M. R. Fairbairn, E. Goulart, A. L. G. A. Coutinho, N. F. F. Ebecken COPPEDurability Assessment of an Arch Dam using Inverse Analysis with Neural Networks and High
KAM theory and the 3D Euler equation
Boris Khesin; Sergei Kuksin; Daniel Peralta-Salas
2014-07-22T23:59:59.000Z
We prove that the dynamical system defined by the hydrodynamical Euler equation on any closed Riemannian 3-manifold $M$ is not mixing in the $C^k$ topology ($k > 4$ and non-integer) for any prescribed value of helicity and sufficiently large values of energy. This can be regarded as a 3D version of Nadirashvili's and Shnirelman's theorems showing the existence of wandering solutions for the 2D Euler equation. Moreover, we obtain an obstruction for the mixing under the Euler flow of $C^k$-neighborhoods of divergence-free vectorfields on $M$. On the way we construct a family of functionals on the space of divergence-free $C^1$ vectorfields on the manifold, which are integrals of motion of the 3D Euler equation. Given a vectorfield these functionals measure the part of the manifold foliated by ergodic invariant tori of fixed isotopy types. We use the KAM theory to establish some continuity properties of these functionals in the $C^k$-topology. This allows one to get a lower bound for the $C^k$-distance between a divergence-free vectorfield (in particular, a steady solution) and a trajectory of the Euler flow.
AUTOMATED, HIGHLY ACCURATE VERIFICATION OF RELAP5-3D
George L Mesina; David Aumiller; Francis Buschman
2014-07-01T23:59:59.000Z
Computer programs that analyze light water reactor safety solve complex systems of governing, closure and special process equations to model the underlying physics. In addition, these programs incorporate many other features and are quite large. RELAP5-3D[1] has over 300,000 lines of coding for physics, input, output, data management, user-interaction, and post-processing. For software quality assurance, the code must be verified and validated before being released to users. Verification ensures that a program is built right by checking that it meets its design specifications. Recently, there has been an increased importance on the development of automated verification processes that compare coding against its documented algorithms and equations and compares its calculations against analytical solutions and the method of manufactured solutions[2]. For the first time, the ability exists to ensure that the data transfer operations associated with timestep advancement/repeating and writing/reading a solution to a file have no unintended consequences. To ensure that the code performs as intended over its extensive list of applications, an automated and highly accurate verification method has been modified and applied to RELAP5-3D. Furthermore, mathematical analysis of the adequacy of the checks used in the comparisons is provided.
Realizacao domestica e escolar de foto e video 3D
Jose J. Lunazzi
2012-12-19T23:59:59.000Z
English: Industry does not give attention to the small domestic or professional market of digital technologies for 3D images. What was done on the XX century by using photographic film is not know available to the common people, though the facilities are even better. Some technique developed in Brasil twenty years ago and the use of conventional domestic photo or video cameras allows fot making pictures and films at home by using digital conversions for editing, and two-color goggles. The anaglyphic technique, the same NASA employs to show Mars images to the public, is not employed in Brazil yet. We must analize the reasons for that. Portugues: A industria nao tem dado atencao ao mercado domestico ou profissional de pequena escala nas novas tecnologias digitais para imagem 3D. O que foi feito ao longo do seculo XX usando filme fotografico nao esta hoje ao alcance das pessoas, sendo que a facilidade de uso e muito maior. Tecnicas desenvolvidas no Brasil ha mais de vinte anos, e o uso de simples cameras convencionais de fotografia e video permitem realizar fotos e filmes caseiros por meio de conversoes digitais na edicao e o uso de oculos bicolor. A tecnica anagifica, a mesma que a NASA usa para mostrar ao publico as imagens de Marte, por exemplo, nao teve espaco no Brasil ainda. Devemos analisar os motivos que podem estar influenciando e os caminhos para mudar isso.
Chiral gravity, log gravity, and extremal CFT
Maloney, Alexander [Physics Department, McGill University, Montreal, QC H3A 2T8 (Canada); Song Wei [Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190 (China); Center for the Fundamental Laws of Nature Jefferson Physical Laboratory, Harvard University, Cambridge, Massachusetts 02138 (United States); Strominger, Andrew [Center for the Fundamental Laws of Nature Jefferson Physical Laboratory, Harvard University, Cambridge, Massachusetts 02138 (United States)
2010-03-15T23:59:59.000Z
We show that the linearization of all exact solutions of classical chiral gravity around the AdS{sub 3} vacuum have positive energy. Nonchiral and negative-energy solutions of the linearized equations are infrared divergent at second order, and so are removed from the spectrum. In other words, chirality is confined and the equations of motion have linearization instabilities. We prove that the only stationary, axially symmetric solutions of chiral gravity are BTZ black holes, which have positive energy. It is further shown that classical log gravity--the theory with logarithmically relaxed boundary conditions--has finite asymptotic symmetry generators but is not chiral and hence may be dual at the quantum level to a logarithmic conformal field theories (CFT). Moreover we show that log gravity contains chiral gravity within it as a decoupled charge superselection sector. We formally evaluate the Euclidean sum over geometries of chiral gravity and show that it gives precisely the holomorphic extremal CFT partition function. The modular invariance and integrality of the expansion coefficients of this partition function are consistent with the existence of an exact quantum theory of chiral gravity. We argue that the problem of quantizing chiral gravity is the holographic dual of the problem of constructing an extremal CFT, while quantizing log gravity is dual to the problem of constructing a logarithmic extremal CFT.
Rawlinson, Nick
; Graeber and Asch, 1999], teleseismic [Steck et al., 1998; Rawlinson et al., 2006] or refraction and wide
Extending ALE3D, an Arbitrarily Connected hexahedral 3D Code, to Very Large Problem Size (U)
Nichols, A L
2010-12-15T23:59:59.000Z
As the number of compute units increases on the ASC computers, the prospect of running previously unimaginably large problems is becoming a reality. In an arbitrarily connected 3D finite element code, like ALE3D, one must provide a unique identification number for every node, element, face, and edge. This is required for a number of reasons, including defining the global connectivity array required for domain decomposition, identifying appropriate communication patterns after domain decomposition, and determining the appropriate load locations for implicit solvers, for example. In most codes, the unique identification number is defined as a 32-bit integer. Thus the maximum value available is 231, or roughly 2.1 billion. For a 3D geometry consisting of arbitrarily connected hexahedral elements, there are approximately 3 faces for every element, and 3 edges for every node. Since the nodes and faces need id numbers, using 32-bit integers puts a hard limit on the number of elements in a problem at roughly 700 million. The first solution to this problem would be to replace 32-bit signed integers with 32-bit unsigned integers. This would increase the maximum size of a problem by a factor of 2. This provides some head room, but almost certainly not one that will last long. Another solution would be to replace all 32-bit int declarations with 64-bit long long declarations. (long is either a 32-bit or a 64-bit integer, depending on the OS). The problem with this approach is that there are only a few arrays that actually need to extended size, and thus this would increase the size of the problem unnecessarily. In a future computing environment where CPUs are abundant but memory relatively scarce, this is probably the wrong approach. Based on these considerations, we have chosen to replace only the global identifiers with the appropriate 64-bit integer. The problem with this approach is finding all the places where data that is specified as a 32-bit integer needs to be replaced with the 64-bit integer. that need to be replaced. In the rest of this paper we describe the techniques used to facilitate this transformation, issues raised, and issues still to be addressed. This poster will describe the reasons, methods, issues associated with extending the ALE3D code to run problems larger than 700 million elements.
Interactive initialization of 2D/3D rigid registration
Gong, Ren Hui; Güler, Özgür [The Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Medical Center, Washington, DC 20010 (United States)] [The Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Medical Center, Washington, DC 20010 (United States); Kürklüoglu, Mustafa [Department of Cardiac Surgery, Children's National Medical Center, Washington, DC 20010 (United States)] [Department of Cardiac Surgery, Children's National Medical Center, Washington, DC 20010 (United States); Lovejoy, John [Department of Orthopaedic Surgery and Sports Medicine, Children's National Medical Center, Washington, DC 20010 (United States)] [Department of Orthopaedic Surgery and Sports Medicine, Children's National Medical Center, Washington, DC 20010 (United States); Yaniv, Ziv, E-mail: ZYaniv@childrensnational.org [The Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Medical Center, Washington, DC 20010 and Departments of Pediatrics and Radiology, George Washington University, Washington, DC 20037 (United States)] [The Sheikh Zayed Institute for Pediatric Surgical Innovation, Children's National Medical Center, Washington, DC 20010 and Departments of Pediatrics and Radiology, George Washington University, Washington, DC 20037 (United States)
2013-12-15T23:59:59.000Z
Purpose: Registration is one of the key technical components in an image-guided navigation system. A large number of 2D/3D registration algorithms have been previously proposed, but have not been able to transition into clinical practice. The authors identify the primary reason for the lack of adoption with the prerequisite for a sufficiently accurate initial transformation, mean target registration error of about 10 mm or less. In this paper, the authors present two interactive initialization approaches that provide the desired accuracy for x-ray/MR and x-ray/CT registration in the operating room setting. Methods: The authors have developed two interactive registration methods based on visual alignment of a preoperative image, MR, or CT to intraoperative x-rays. In the first approach, the operator uses a gesture based interface to align a volume rendering of the preoperative image to multiple x-rays. The second approach uses a tracked tool available as part of a navigation system. Preoperatively, a virtual replica of the tool is positioned next to the anatomical structures visible in the volumetric data. Intraoperatively, the physical tool is positioned in a similar manner and subsequently used to align a volume rendering to the x-ray images using an augmented reality (AR) approach. Both methods were assessed using three publicly available reference data sets for 2D/3D registration evaluation. Results: In the authors' experiments, the authors show that for x-ray/MR registration, the gesture based method resulted in a mean target registration error (mTRE) of 9.3 ± 5.0 mm with an average interaction time of 146.3 ± 73.0 s, and the AR-based method had mTREs of 7.2 ± 3.2 mm with interaction times of 44 ± 32 s. For x-ray/CT registration, the gesture based method resulted in a mTRE of 7.4 ± 5.0 mm with an average interaction time of 132.1 ± 66.4 s, and the AR-based method had mTREs of 8.3 ± 5.0 mm with interaction times of 58 ± 52 s. Conclusions: Based on the authors' evaluation, the authors conclude that the registration approaches are sufficiently accurate for initializing 2D/3D registration in the OR setting, both when a tracking system is not in use (gesture based approach), and when a tracking system is already in use (AR based approach)
RELAP5-3D Restart and Backup Verification Testing
Dr. George L Mesina
2013-09-01T23:59:59.000Z
Existing testing methodology for RELAP5-3D employs a set of test cases collected over two decades to test a variety of code features and run on a Linux or Windows platform. However, this set has numerous deficiencies in terms of code coverage, detail of comparison, running time, and testing fidelity of RELAP5-3D restart and backup capabilities. The test suite covers less than three quarters of the lines of code in the relap directory and just over half those in the environmental library. Even in terms of code features, many are not covered. Moreover, the test set runs many problems long past the point necessary to test the relevant features. It requires standard problems to run to completion. This is unnecessary for features can be tested in a short-running problem. For example, many trips and controls can be tested in the first few time steps, as can a number of fluid flow options. The testing system is also inaccurate. For the past decade, the diffem script has been the primary tool for checking that printouts from two different RELAP5-3D executables agree. This tool compares two output files to verify that all characters are the same except for those relating to date, time and a few other excluded items. The variable values printed on the output file are accurate to no more than eight decimal places. Therefore, calculations with errors in decimal places beyond those printed remain undetected. Finally, fidelity of restart is not tested except in the PVM sub-suite and backup is not specifically tested at all. When a restart is made from any midway point of the base-case transient, the restart must produce the same values. When a backup condition occurs, the code repeats advancements with the same time step. A perfect backup can be tested by forcing RELAP5 to perform a backup by falsely setting a backup condition flag at a user-specified-time. Comparison of the calculations of that run and those produced by the same input w/o the spurious condition should be identical. Backup testing is more difficult the other kinds of testing described above because it requires additional coding to implement. The testing system constructed and described in this document resolves all of these issues. A matrix of test features and short-running cases that exercise them is presented. A small information file that contains sufficient data to verify calculations to the last decimal place and bit is produced. This testing system is used to test base cases (called null testing) as well as restart and backup cases. The programming that implements these new capabilities is presented.
Pointwise Fourier Inversion: a Wave Equation Approach
Pointwise Fourier Inversion: a Wave Equation Approach Mark A. Pinsky1 Michael E. Taylor2. A general criterion for pointwise Fourier inversion 2. Pointwise Fourier inversion on Rn (n = 3) 3. Fourier inversion on R2 4. Fourier inversion on Rn (general n) 5. Fourier inversion on spheres 6. Fourier inversion
Fast 3D Surface Extraction 2 pages (including abstract)
Sewell, Christopher Meyer [Los Alamos National Laboratory; Patchett, John M. [Los Alamos National Laboratory; Ahrens, James P. [Los Alamos National Laboratory
2012-06-05T23:59:59.000Z
Ocean scientists searching for isosurfaces and/or thresholds of interest in high resolution 3D datasets required a tedious and time-consuming interactive exploration experience. PISTON research and development activities are enabling ocean scientists to rapidly and interactively explore isosurfaces and thresholds in their large data sets using a simple slider with real time calculation and visualization of these features. Ocean Scientists can now visualize more features in less time, helping them gain a better understanding of the high resolution data sets they work with on a daily basis. Isosurface timings (512{sup 3} grid): VTK 7.7 s, Parallel VTK (48-core) 1.3 s, PISTON OpenMP (48-core) 0.2 s, PISTON CUDA (Quadro 6000) 0.1 s.
Superconductivity from D3/D7: Holographic Pion Superfluid
Pallab Basu; Jianyang He; Anindya Mukherjee; Hsien-Hang Shieh
2008-10-22T23:59:59.000Z
We show that a D3/D7 system (at zero quark mass limit) at finite isospin chemical potential goes through a superconductor (superfluid) like phase transition. This is similar to a flavored superfluid phase studied in QCD literature, where mesonic operators condensate. We have studied the frequency dependent conductivity of the condensate and found a delta function pole in the zero frequency limit. This is an example of superconductivity in a string theory context. Consequently we have found a superfluid/supercurrent type solution and studied the associated phase diagram. The superconducting transition changes from second order to first order at a critical superfluid velocity. We have studied various properties of the superconducting system like superfluid density, energy gap, second sound etc. We investigate the possibility of the isospin chemical potential modifying the embedding of the flavor branes by checking whether the transverse scalars also condense at low temperature. This however does not seem to be the case.
3-D Simulations of Ergospheric Disk Driven Poynting Jets
Brian Punsly
2007-04-05T23:59:59.000Z
This Letter reports on 3-dimensional simulations of Kerr black hole magnetospheres that obey the general relativistic equations of perfect magnetohydrodynamics (MHD). In particular, we study powerful Poynting flux dominated jets that are driven from dense gas in the equatorial plane in the ergosphere. The physics of which has been previously studied in the simplified limit of an ergopsheric disk. For high spin black holes, $a/M > 0.95$, the ergospheric disk is prominent in the 3-D simulations and is responsible for greatly enhanced Poynting flux emission. Any large scale poloidal magnetic flux that is trapped in the equatorial region leads to an enormous release of electromagnetic energy that dwarfs the jet energy produced by magnetic flux threading the event horizon. The implication is that magnetic flux threading the equatorial plane of the ergosphere is a likely prerequisite for the central engine of powerful FRII quasars.
Shell Element Verification & Regression Problems for DYNA3D
Zywicz, E
2008-02-01T23:59:59.000Z
A series of quasi-static regression/verification problems were developed for the triangular and quadrilateral shell element formulations contained in Lawrence Livermore National Laboratory's explicit finite element program DYNA3D. Each regression problem imposes both displacement- and force-type boundary conditions to probe the five independent nodal degrees of freedom employed in the targeted formulation. When applicable, the finite element results are compared with small-strain linear-elastic closed-form reference solutions to verify select aspects of the formulations implementation. Although all problems in the suite depict the same geometry, material behavior, and loading conditions, each problem represents a unique combination of shell formulation, stabilization method, and integration rule. Collectively, the thirty-six new regression problems in the test suite cover nine different shell formulations, three hourglass stabilization methods, and three families of through-thickness integration rules.
Modeling the GFR with RELAP5-3D
Cliff B. Davis; Theron D. Marshall; K. D. Weaver
2005-09-01T23:59:59.000Z
Significant improvements have been made to the RELAP5-3D computer code for analysis of the Gas Fast Reactor (GFR). These improvements consisted of adding carbon dioxide as a working fluid, improving the turbine component, developing a compressor model, and adding the Gnielinski heat transfer correlation. The code improvements were validated, generally through comparisons with independent design calculations. A model of the power conversion unit of the GFR was developed. The model of the power conversion unit was coupled to a reactor model to develop a complete model of the GFR system. The RELAP5 model of the GFR was used to simulate two transients, one initiated by a reactor trip and the other initiated by a loss of load.
Exploration 3-D Seismic Field Test/Native Tribes Initiative
Carroll, Herbert B.; Chen, K.C.; Guo, Genliang; Johnson, W.I.; Reeves,T.K.; Sharma,Bijon
1999-04-27T23:59:59.000Z
To determine current acquisition procedures and costs and to further the goals of the President's Initiative for Native Tribes, a seismic-survey project is to be conducted on Osage tribal lands. The goals of the program are to demonstrate the capabilities, costs, and effectiveness of 3-D seismic work in a small-operator setting and to determine the economics of such a survey. For these purposes, typical small-scale independent-operator practices are being followed and a shallow target chose in an area with a high concentration of independent operators. The results will be analyzed in detail to determine if there are improvements and/or innovations which can be easily introduced in field-acquisition procedures, in processing, or in data manipulation and interpretation to further reduce operating costs and to make the system still more active to the small-scale operator.
3D deformation field throughout the interior of materials.
Jin, Huiqing; Lu, Wei-Yang
2013-09-01T23:59:59.000Z
This report contains the one-year feasibility study for our three-year LDRD proposal that is aimed to develop an experimental technique to measure the 3D deformation fields inside a material body. In this feasibility study, we first apply Digital Volume Correlation (DVC) algorithm to pre-existing in-situ Xray Computed Tomography (XCT) image sets with pure rigid body translation. The calculated displacement field has very large random errors and low precision that are unacceptable. Then we enhance these tomography images by setting threshold of the intensity of each slice. DVC algorithm is able to obtain accurate deformation fields from these enhanced image sets and the deformation fields are consistent with the global mechanical loading that is applied to the specimen. Through this study, we prove that the internal markers inside the pre-existing tomography images of aluminum alloy can be enhanced and are suitable for DVC to calculate the deformation field throughout the material body.
3D Model of the Neal Hot Springs Geothermal Area
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
Faulds, James E.
The Neal Hot Springs geothermal system lies in a left-step in a north-striking, west-dipping normal fault system, consisting of the Neal Fault to the south and the Sugarloaf Butte Fault to the north (Edwards, 2013). The Neal Hot Springs 3D geologic model consists of 104 faults and 13 stratigraphic units. The stratigraphy is sub-horizontal to dipping <10 degrees and there is no predominant dip-direction. Geothermal production is exclusively from the Neal Fault south of, and within the step-over, while geothermal injection is into both the Neal Fault to the south of the step-over and faults within the step-over.
3D Model of the San Emidio Geothermal Area
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
James E. Faulds
The San Emidio geothermal system is characterized by a left-step in a west-dipping normal fault system that bounds the western side of the Lake Range. The 3D geologic model consists of 5 geologic units and 55 faults. Overlying Jurrassic-Triassic metasedimentary basement is a ~500 m-1000 m thick section of the Miocene lower Pyramid sequence, pre- syn-extensional Quaternary sedimentary rocks and post-extensional Quaternary rocks. 15-30ş eastward dip of the stratigraphy is controlled by the predominant west-dipping fault set. Both geothermal production and injection are concentrated north of the step over in an area of closely spaced west dipping normal faults.
Tuneable quantum interference in a 3D integrated circuit
Zachary Chaboyer; Thomas Meany; L. G. Helt; Michael J. Withford; M. J. Steel
2014-09-26T23:59:59.000Z
Integrated photonics promises solutions to questions of stability, complexity, and size in quantum optics. Advances in tunable and non-planar integrated platforms, such laser-inscribed photonics, continue to bring the realisation of quantum advantages in computation and metrology ever closer, perhaps most easily seen in multi-path interferometry. Here we demonstrate control of two-photon interference in a chip-scale 3D multi-path interferometer, showing a reduced periodicity and enhanced visibility compared to single photon measurements. Observed non-classical visibilities are widely tunable, and explained well by theoretical predictions based on classical measurements. With these predictions we extract a Fisher information approaching a theoretical maximum, demonstrating the capability of the device for quantum enhanced phase measurements.
3D Model of the Neal Hot Springs Geothermal Area
Faulds, James E.
2013-12-31T23:59:59.000Z
The Neal Hot Springs geothermal system lies in a left-step in a north-striking, west-dipping normal fault system, consisting of the Neal Fault to the south and the Sugarloaf Butte Fault to the north (Edwards, 2013). The Neal Hot Springs 3D geologic model consists of 104 faults and 13 stratigraphic units. The stratigraphy is sub-horizontal to dipping <10 degrees and there is no predominant dip-direction. Geothermal production is exclusively from the Neal Fault south of, and within the step-over, while geothermal injection is into both the Neal Fault to the south of the step-over and faults within the step-over.
3D Model of the San Emidio Geothermal Area
James E. Faulds
2013-12-31T23:59:59.000Z
The San Emidio geothermal system is characterized by a left-step in a west-dipping normal fault system that bounds the western side of the Lake Range. The 3D geologic model consists of 5 geologic units and 55 faults. Overlying Jurrassic-Triassic metasedimentary basement is a ~500 m-1000 m thick section of the Miocene lower Pyramid sequence, pre- syn-extensional Quaternary sedimentary rocks and post-extensional Quaternary rocks. 15-30ş eastward dip of the stratigraphy is controlled by the predominant west-dipping fault set. Both geothermal production and injection are concentrated north of the step over in an area of closely spaced west dipping normal faults.
Automating the determination of 3D protein structure
Rayl, K.D.
1993-12-31T23:59:59.000Z
The creation of an automated method for determining 3D protein structure would be invaluable to the field of biology and presents an interesting challenge to computer science. Unfortunately, given the current level of protein knowledge, a completely automated solution method is not yet feasible, therefore, our group has decided to integrate existing databases and theories to create a software system that assists X-ray crystallographers in specifying a particular protein structure. By breaking the problem of determining overall protein structure into small subproblems, we hope to come closer to solving a novel structure by solving each component. By generating necessary information for structure determination, this method provides the first step toward designing a program to determine protein conformation automatically.
3D-Simulation Studies of SNS Ring Doublet Magnets
Wang, J.G.; Tsoupas N.; Venturini, M.
2005-05-05T23:59:59.000Z
The accumulator ring of the Spallation Neutron Source (SNS) at ORNL employs in its straight sections closely packed quadrupole doublemagnets with large aperture of R=15.1 cm an relatively short iron-to-iron distance of 51.4 cm. These quads have much extended fringe field, and magnetic interferences among them in the doublet assemblies is not avoidable. Though each magnet in the assemblies has been individually mapped to high accuracy of lower than 0.01 percent level, the experimental data including the magnetic interference effect will not be available. We have performed 3D computing simulations on a quadrupole doublet model in order to assess the degree of the interference and to obtain relevant data for the SNS commissioning and operation.
Design and fabrication of a modular multi-material 3D printer
Lan, Justin (Justin T.)
2013-01-01T23:59:59.000Z
This thesis presents 3DP-0, a modular, multi-material 3D printer. Currently, 3D printers available on the market are typically expensive and difficult to develop. In addition, the simultaneous use of multiple materials in ...
Kilian, Kristopher A.
3-D Printed Electrically and Optically Paced Skeletal Muscle Based Biological Machines Caroline Research Aims and Goals · To use 3D printing technologies to fabricate the structure of the biological
Local Motors Begins Their Six Day Quest to 3D Print the 'Strati...
Broader source: Energy.gov (indexed) [DOE]
Local Motors Begins Their Six Day Quest to 3D Print the 'Strati' Car Live at IMTS Local Motors Begins Their Six Day Quest to 3D Print the 'Strati' Car Live at IMTS An article...
asymmetric 3d in-vitro: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...
anion-templated 3d heterobimetallic: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...
A View of Manufacturing Through 3D Glasses | GE Global Research
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
from machining and casting technologies to materials science, welding, and yes, 3D printing. In the past few years, 3D printing, or additive as we call it in our labs, has...
Programmers Manual for the PVM Coupling Interface in RELAP5-3D
Walter L Weaver III
2005-03-01T23:59:59.000Z
This report describes the implementation of the PVM API in the RELAP5-3D© computer code. The information in the report is intended for programmers wanting to correct or extend RELAP5-3D©.
Simultaneous Detection and Registration for Ileo-Cecal Valve Detection in 3D CT Colonography
Barbu, Adrian
Simultaneous Detection and Registration for Ileo-Cecal Valve Detection in 3D CT Colonography Le Lu1-Cecal Valve (ICV) detection in both clean and tagged 3D CT colonography scans. Our final ICV detection system
Design and analysis of a concrete modular housing system constructed with 3D panels
Sarcia, Sam Rhea, 1982-
2004-01-01T23:59:59.000Z
An innovative modular house system design utilizing an alternative concrete residential building system called 3D panels is presented along with an overview of 3D panels as well as relevant methods and markets. The proposed ...
Impact of 3D printing on global supply chains by 2020
Bhasin, Varun
2014-01-01T23:59:59.000Z
This thesis aims to quantitatively estimate the potential impact of 3D Printing on global supply chains. Industrial adoption of 3D Printing has been increasing gradually from prototyping to manufacturing of low volume ...
ModelCraft: Capturing Freehand Annotations and Edits on Physical 3D Models
Keinan, Alon
of affordable new desktop fabrication techniques such as 3D printing and laser cutting, physical models are used cur- rent 3D printing technology. ACM CLASSIFICATION: H5.2 [Information interfaces and presentation
THINKING LIKE ARCHIMEDES WITH A 3D PRINTER OLIVER KNILL AND ELIZABETH SLAVKOVSKY
Knill, Oliver
, where 3D printing is becoming popular and affordable. 1. Introduction Archimedes, whose 2300th birthday education, 3D printing, Rapid prototyping, Greek mathematics. 1 #12;2 OLIVER KNILL AND ELIZABETH SLAVKOVSKY
3D microstructure modeling of compressed fiber-based Gerd Gaiselmanna,
Schmidt, Volker
consideration of compression conditions as found in fuel cells. Given the input of a 3D microstructure of some compression states, an optimal vector field is estimated by simulated annealing. The model is applied to 3D im
NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration
Bentz, Dale P.
NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration and Microstructure Development Modeling Package. Version 3.0 Dale P. Bentz #12;NISTIR 7232 CEMHYD3D: A Three-Dimensional Cement Hydration
3D Cobra, Renewable Energy, and Green Button at the National...
3D Cobra, Renewable Energy, and Green Button at the National Maker Faire 3D Cobra, Renewable Energy, and Green Button at the National Maker Faire June 12, 2015 - 9:15am Addthis The...
CAD Tools for Creating Space-filing 3D Escher Tiles
Howison, Mark
2010-01-01T23:59:59.000Z
Space-filing 3D Escher Tiles Mark Howison 1 and Carlo H.decorative solids that tile 3-space in a regular, isohedralrepresentations of 3D tiles, including a Java implementation
Evaluation of PC-ISO for customized, 3D printed, gynecologic 192Ir HDR brachytherapy applicators
2015-01-01T23:59:59.000Z
2015 253 Cunha et al. : PC-ISO for 3D printed brachytherapy1, 2015 Evaluation of PC-ISO for customized, 3D printed,attenuation properties of PC-ISO, a commercially available,
Does DOF Separation on Elastic Devices Improve User 3D Steering Task Performance?
Casiez, Géry
Does DOF Separation on Elastic Devices Improve User 3D Steering Task Performance? G´ery CasiezHaptic in a 3D steering task. Unlike other devices intended to interact in 3D with one end-effector, the Digi the manipulation of a stylus or thimble, and the SpaceMouse [2] is an elastic device to rate control objects in 3D
The roughness of stylolites: Implications of 3D high resolution topography measurements
Boyer, Edmond
diagenesis and metamorphism that develop after their initiation. In this Letter we show the first 3D high
Direct-Write Assembly of 3D Hydrogel Scaffolds for Guided Cell Growth
Lewis, Jennifer
reservoir-induced coagulation to enable 3D printing,[14] we report the creation of hydrogel inks that can
Final report: high resolution lensless 3D imaging of nanostructures with coherent x-rays
Jacobsen, Chris
2014-12-07T23:59:59.000Z
Final report on the project "High resolution lensless 3D imaging of nanostructures with coherent x-rays"
A Desktop 3D Printer in Safety-Critical Java Trur Biskopst Strm
Schoeberl, Martin
A Desktop 3D Printer in Safety-Critical Java Tórur Biskopstř Strřm Department of Informatics according to the specification. In this paper we present a 3D printer and its safety-critical Java level 1 evaluate the specification by implementing a RepRap 3D desktop printer as a use case. A RepRap is a desktop
Spheree: A 3D Perspective-Corrected Interactive Spherical Scalable Display Ferreira, F.q
British Columbia, University of
in their applications or even print them with a 3D printer. Thus, Spheree plays a key role in realizing a completeSpheree: A 3D Perspective-Corrected Interactive Spherical Scalable Display Ferreira, F.q , Cabral to support head-coupled rendering to provide parallax-based 3D depth cues. Spheree is relatively compact
Construction of suitable weak solutions for the 3D incompressible NSEs
Guermond, Jean-Luc
Construction of suitable weak solutions for the 3D incompressible NSEs Jean-Luc Guermond Department Univ. October 24, 2008 Jean-Luc Guermond Construction of suitable weak solutions for the 3D NSEs #12;Outline 1 BASIC FACTS ABOUT THE 3D NSE Jean-Luc Guermond Construction of suitable weak solutions for the 3
Abbeel, Pieter
multiple smooth channels through a 3D printed structure for a healthcare applica- tion and is relevant 3D printed implants to temporarily insert high-dose radioactive sources to reach and cover tumors] demonstrated that 3D printing can be used to design customized implants that conform to the patient anatomy
ROBOPuppet: Low-Cost, 3D Printed Miniatures for Teleoperating Full-Size Robots
Hauser, Kris
ROBOPuppet: Low-Cost, 3D Printed Miniatures for Teleoperating Full-Size Robots Anna Eilering of the robot links, which are then 3D printed and assembled. This procedure is generalizable to variety to target robot. smaller scale suitable for desktop use. The puppet is a 3D- printed miniature of the target
Build-to-Last: Strength to Weight 3D Printed Objects Andrei Sharf2
Sharf, Andrei
Build-to-Last: Strength to Weight 3D Printed Objects Lin Lu1 Andrei Sharf2 Haisen Zhao1 Yuan Wei1-right). The 3D printed hollowed solid is built-to-last using our interior structure (right). Abstract stress. Thus, our system allows to build-to-last 3D printed objects with large control over
Abbeel, Pieter
, bevel-tip medical needles, planning curvature-constrained channels in 3D printed implants for targeted for perturbations. Our ap- proach can also be used for designing optimized channel layouts within 3D printed is the design of multiple bounded curvature channels in intracavitary 3D printed im- plants through which
Custom 3D-Printed Rollers for Frieze Pattern Cookies Robert Hanson
Custom 3D-Printed Rollers for Frieze Pattern Cookies Robert Hanson Towson University, Emeritus a method for converting images of repeating patterns, e.g., Roman friezes or Escher tessellations, into 3D-printed the world of mathematics and the art of cooking. Fractal cookies based on stretching and folding [1] and 3D-printed
A Series of Tubes: Adding Interactivity to 3D Prints Using Internal Pipes
Zakhor, Avideh
A Series of Tubes: Adding Interactivity to 3D Prints Using Internal Pipes Valkyrie Savage valkyrie flexibility and potential. Author Keywords Fabrication; 3D Printing; Interactive Objects; Design Tools ACM. Recently, human-computer interaction researchers have be- gun to explore adding interaction to 3D printed
Topological Reconstruction of Complex 3D Buildings and Automatic Extraction of Levels of Detail
Boyer, Edmond
and outdoor topology of a detailed 3D building model from its geometry and to extract different levelsTopological Reconstruction of Complex 3D Buildings and Automatic Extraction of Levels of Detail A is needed for most of the applications using 3D building models after the architects design it. While
Fast 3D Brain Segmentation Using Dual-Front Active Contours with Optional User-Interaction
Cohen, Laurent
Fast 3D Brain Segmentation Using Dual-Front Active Contours with Optional User-Interaction Hua Li1 attributes of 3D brain segmentation algorithms in- clude robustness, accuracy, computational efficiency result. We propose a novel 3D brain cortex segmentation procedure utilizing dual- front active contours
USING OF NON-EXPENSIVE 3D SCANNING INSTRUMENTS FOR CULTURAL HERITAGE DOCUMENTATION
Stockman, George
of Monuments Research (Faculty of Nuclear Physics and Physical Engineering), new methods of 3D objects documentation are tested on school level. There are two types of 3D scanners under development: the first type of Monuments Research (Faculty of Nuclear Physics and Physical Engineering), new methods of 3D objects
ORIGINAL PAPER Impact of 3-D topography on surface radiation budget over
Liou, K. N.
ORIGINAL PAPER Impact of 3-D topography on surface radiation budget over the Tibetan Plateau Wei: 29 September 2012 # Springer-Verlag 2012 Abstract The 3-D complex topography effect on the sur- face on the basis of "exact" 3-D Monte Carlo photon tracing sim- ulations, which use 90 m topography data
Interweaving 3D Network with Double Helical Tubes Filled by 1D Coordination Polymer Chains
Gao, Song
Interweaving 3D Network with Double Helical Tubes Filled by 1D Coordination Polymer Chains E Yang- tecture interpenetrated by three types of coordination polymer motifs. Two independent {[Cu2(mellitate)(4,4-bpy)(H2O)2]2- } 3D polymers incorporating helical substructures were interwoven into a 3D network
Using a Randomized Path Planner to Generate 3D Task Demonstrations of Robot Operations
Kabanza, Froduald
Using a Randomized Path Planner to Generate 3D Task Demonstrations of Robot Operations Khaled for generating 3D tasks demonstrations involving a teleoperated robot arm on the International Space Station (ISS 3D animations that show how to perform a given task with the SSRMS. The current ATDG prototype
A System for 3D Error Visualization and Assessment of Digital Elevation Models
Gousie, Michael B.
A System for 3D Error Visualization and Assessment of Digital Elevation Models Michael B. Gousie that displays a DEM and possible errors in 3D, along with its associated contour or sparse data and detail. The cutting tool is semi-transparent so that the profile is seen in the context of the 3D surface
Reconstructing Plants in 3D from a Single Image using Analysis-by-Synthesis
Paris-Sud XI, Université de
Reconstructing Plants in 3D from a Single Image using Analysis-by-Synthesis J´er^ome Gu´enard1 G from images. However, due to high complexity of plant topology, dedicated methods for generating 3D plant models must be devised. We propose to generate a 3D model of a plant, using an analysis
3D WEB GRAPHICS WITHOUT PLUGINS USING VML A Master Project
Pollett, Chris
, allows viewing 3D graphics on the web without plugins. This style sheet saves the users time and energy3D WEB GRAPHICS WITHOUT PLUGINS USING VML A Master Project Presented to The faculty, a plugin is required to view 3D graphics in the most common web browsers, Internet Explorer and Netscape
" project Lamp ontworpen en gemaakt tijdens het "lightstyle" project 3D print van een sieraad, gebaseerd op! #12;3D prints gemaakt in gips bij Bouwkunde CT scan van middeleeuws glas om een digitale reproductie, modeling, data massaging, 3D printing. · Objet trouvé Prototyping in verschillende domeinen en hoe domein
Forensic Retrieval of Striations on Fired Bullets by using 3D Geometric Data
Tokyo, University of
Forensic Retrieval of Striations on Fired Bullets by using 3D Geometric Data Atsuhiko Banno-based approaches, we can utilize 3D geometric data of tool marks that are free from lighting condition propose a two-stage comparison method focused on 3D geometric. At first, we have aligned global shapes
3D Cinematography Principles and Their Applications to Stereoscopic Media Processing
Ouhyoung, Ming
3D Cinematography Principles and Their Applications to Stereoscopic Media Processing Chun-Wei Liu Taiwan University Taipei, Taiwan cyy@csie.ntu.edu.tw ABSTRACT This paper introduces 3D cinematography show that by incorporating 3D cinematography prin- ciples, the proposed methods yield more comfortable
Directed cell growth and alignment on protein-patterned 3D hydrogels with stereolithography
Bashir, Rashid
- assisted, three-dimensional (3D) printing system used for creating complex structures from July 2012) The stereolithography apparatus (SLA) is a computer-assisted, three-dimensional (3D-use parts and preoperative surgical plans (Barker et al. 1994, Winder and Bibb 2005). The SLA and other 3D
Fleming, Paul D. "Dan"
Production of 3D Structures in Printing Veronika Chovancova*, Alexandra Pekarovicova* and Paul D from our laboratory show a modified formula of hot melt ink that can be used in 3D thermal wax printing. Fleming III* Keywords: 3D Structure, Hot Melt, Blowing Agents, Calorimetry Abstract The ability to form
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 1 A Rigorous and Efficient Analysis of 3D Printed
Aksun, M. Irsadi
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 1 A Rigorous and Efficient Analysis of 3D Printed of structures with multiple vertical strips running in multilayer environment. Index Terms-- Multilayered 3D is developed to accurately simulate 3D structures in multilayer environment [1], and to simultaneously simulate
Department of Mechanical Engineering Spring 2013 3D Printed Medical Device
Demirel, Melik C.
PENNSTATE Department of Mechanical Engineering Spring 2013 3D Printed Medical Device Overview This project aimed to develop a 3D-printed everting structure for use in conjunction with current endosurgical/concept and that our main form of manufacturing revolved around 3D-printing, which allowed us to quickly make
Manipulating complex network structures in virtual reality and 3D printing of the results
Verschure, Paul
Manipulating complex network structures in virtual reality and 3D printing of the results Alberto the results at any time for direct 3D printing. 1. INTRODUCTION Although its first appearance on the market can be tracked up to three decades ago, stereolithography (also known as 3D printing) has become
Hot Melt Inks for 3D Printing Veronika Chovancova*, Alexandra Pekarovicova* and Paul D. Fleming III
Fleming, Paul D. "Dan"
Hot Melt Inks for 3D Printing Veronika Chovancova*, Alexandra Pekarovicova* and Paul D. Fleming III for 3D printing comprises different waxes, tackifier and plasticizer resins, rheology modifiers, and UV rheological (or flow) behavior. 1 3D printing, direct ink-jet printing, and related approaches such as hot
Cost-effective Printing of 3D Objects with Skin-Frame Structures Weiming Wang,
Deng, Jiansong
; Keywords: 3D printing, fabrication, frame structure, sparsity op- timization Corresponding author: yangzw@ustc.edu.cn (Zhouwang Yang) 1 Introduction Additive manufacturing (3D printing) enables fabrication of physi- cal techniques of 3D printing has received considerable attention for assisting users to generate desired
Make It Stand: Balancing Shapes for 3D Fabrication Romain Prvost1
Lévy, Bruno
modeling Keywords: Static equilibrium, structural stability, 3D printing, optimization, interactive shape intended, stable pose. With the advent of 3D printing technologies, it becomes very simple to produce in a computer this is of no consequence: the laws of physics do not apply. However, fabrication through 3D
Printed Optics: 3D Printing of Embedded Optical Elements for Interactive Devices
Poupyrev, Ivan
Printed Optics: 3D Printing of Embedded Optical Elements for Interactive Devices Karl D.D. Willis1 d Figure 1: Custom optical elements are fabricated with 3D printing and embedded in interactive), and embedded optoelectronics (d). ABSTRACT We present an approach to 3D printing custom optical ele- ments
Kane, Shaun K.
r Tracking @stemxcomet: Teaching Programming to Blind Students via 3D Printing, Crisis Management such as 3D printing offer an opportunity for students to write programs that produce tactile objects and suggests future directions for integrating data analysis and 3D printing into programming instruction
Customization and 3D Printing: A Challenging Playground for Software Product Lines
Boyer, Edmond
Customization and 3D Printing: A Challenging Playground for Software Product Lines Mathieu Acher firstname.lastname@irisa.fr ABSTRACT 3D printing is gaining more and more momentum to build customized. We provide hints that SPL-alike techniques are practically used in 3D printing and thus relevant
Computational Light Routing: 3D Printed Optical Fibers For Sensing and Display
Computational Light Routing: 3D Printed Optical Fibers For Sensing and Display THIAGO PEREIRA or restrict themselves to light dif- fusion in volumes. We use multi-material 3D printing to fabricate objects Additional Key Words and Phrases: 3D printing, optical fibers ACM Reference Format: Pereira, T, Rusinkiewicz
Voxel-Based Assessment of Printability of 3D Alexandru Telea1
Telea, Alexandru C.
from a real-life application. 1 Introduction Recent advances in 3D printing technology have made of materials, higher printing speeds, and lower costs. High-quality, low-cost 3D printing is now available on a given printer. As 3D printing technology works in a raster fashion, we implement our proposed metrics
Bridging the Gap: Automated Steady Scaffoldings for 3D Printing Jrmie Dumas
Lévy, Bruno
Bridging the Gap: Automated Steady Scaffoldings for 3D Printing Jérémie Dumas Université de Figure 1: The upper leg of the Poppy robot (www.poppy-project.org) cannot be 3D printed on low cost FDM usage. Abstract Fused Filament Fabrication (FFF) is the process of 3D printing ob- jects from melted
MAE SEMINAR Recent advances in Additive Manufacturing/3D Printing Technologies, Material Science and
Mease, Kenneth D.
MAE SEMINAR Recent advances in Additive Manufacturing/3D Printing Technologies, Material Science Samueli School of Engineering University of California Irvine 3D printing or Additive Manufacturing in different shapes. 3D printing is also considered distinct from traditional machining techniques, which
SCALING-UP OF NEW GENERATION OF 3D FLEXIBLE ORGANIC SOLAR CELLS
Kassegne, Samuel Kinde
SCALING-UP OF NEW GENERATION OF 3D FLEXIBLE ORGANIC SOLAR CELLS _______________ A Thesis Presented Generation of 3D Flexible Organic Solar Cell _____________________________________________ Samuel Kinde Engineering San Diego State University, 2012 Scaling-up of New Generation of 3D Flexible Organic Solar Cells
3-D Point Cloud Generation from Rigid and Flexible Stereo Vision Systems
Kochersberger, Kevin
3-D Point Cloud Generation from Rigid and Flexible Stereo Vision Systems Nathaniel J. Short Thesis Calibration, Terrain Mapping Copyright 2009 #12;3-D Point Cloud Generation from Rigid and Flexible Stereo of tools have been developed to generate 3-D point clouds from rigid and flexible stereo systems, along
INVERSE PROTEIN FOLDING, HIERARCHICAL OPTIMISATION
Halligan, Daniel
INVERSE PROTEIN FOLDING, HIERARCHICAL OPTIMISATION AND TIE KNOTS Thomas M. A. Fink st. john Introduction 3 1.1 Inverse Protein Folding 3 1.2 Hierarchical Optimisation 5 1.3 Tie Knots 6 1.4 Schematic Organisation 6 1.5 Publications 9 2 Protein Folding, Inverse Protein Folding and Energy Landscapes 10 2
7, 1043910465, 2007 Mesoscale inversion
Boyer, Edmond
ACPD 7, 1043910465, 2007 Mesoscale inversion T. Lauvaux et al. Title Page Abstract Introduction Discussions Mesoscale inversion: first results from the CERES campaign with synthetic data T. Lauvaux 1,2 , M.lauvaux@lsce.ipsl.fr) 10439 #12;ACPD 7, 1043910465, 2007 Mesoscale inversion T. Lauvaux et al. Title Page Abstract
Min-wuk Lee 1 A fixedA fixed--point 3D graphics library withpoint 3D graphics library with
Yoo, Hoi-Jun
Outline Introduction Motivation MobileGL: Mobile 3D graphics library Energy-efficient CPU cache Energy-optimization for mobile 3D graphics Software system : High speed graphics library (MobileGL) Hardware system : Energy-cost target High speed graphics library Energy-efficient CPU cache system High quality target High speed
Ohbuchi, Ryutarou
printers,... User generated. T i bl 3D h· Trimble 3D warehouse... 3D model retrieval is essential scanners, 3D printers,... User generated. T i bl 3D h· Trimble 3D warehouse... 3D model retrievalRanking on Cross Domain Manifold forRanking on Cross-Domain Manifold for Sketch-based 3D model
3D Model of the Tuscarora Geothermal Area
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
Faulds, James E.
The Tuscarora geothermal system sits within a ~15 km wide left-step in a major west-dipping range-bounding normal fault system. The step over is defined by the Independence Mountains fault zone and the Bull Runs Mountains fault zone which overlap along strike. Strain is transferred between these major fault segments via and array of northerly striking normal faults with offsets of 10s to 100s of meters and strike lengths of less than 5 km. These faults within the step over are one to two orders of magnitude smaller than the range-bounding fault zones between which they reside. Faults within the broad step define an anticlinal accommodation zone wherein east-dipping faults mainly occupy western half of the accommodation zone and west-dipping faults lie in the eastern half of the accommodation zone. The 3D model of Tuscarora encompasses 70 small-offset normal faults that define the accommodation zone and a portion of the Independence Mountains fault zone, which dips beneath the geothermal field. The geothermal system resides in the axial part of the accommodation, straddling the two fault dip domains. The Tuscarora 3D geologic model consists of 10 stratigraphic units. Unconsolidated Quaternary alluvium has eroded down into bedrock units, the youngest and stratigraphically highest bedrock units are middle Miocene rhyolite and dacite flows regionally correlated with the Jarbidge Rhyolite and modeled with uniform cumulative thickness of ~350 m. Underlying these lava flows are Eocene volcanic rocks of the Big Cottonwood Canyon caldera. These units are modeled as intracaldera deposits, including domes, flows, and thick ash deposits that change in thickness and locally pinch out. The Paleozoic basement of consists metasedimenary and metavolcanic rocks, dominated by argillite, siltstone, limestone, quartzite, and metabasalt of the Schoonover and Snow Canyon Formations. Paleozoic formations are lumped in a single basement unit in the model. Fault blocks in the eastern portion of the model are tilted 5-30 degrees toward the Independence Mountains fault zone. Fault blocks in the western portion of the model are tilted toward steeply east-dipping normal faults. These opposing fault block dips define a shallow extensional anticline. Geothermal production is from 4 closely-spaced wells, that exploit a west-dipping, NNE-striking fault zone near the axial part of the accommodation zone.
3D Model of the Tuscarora Geothermal Area
Faulds, James E.
2013-12-31T23:59:59.000Z
The Tuscarora geothermal system sits within a ~15 km wide left-step in a major west-dipping range-bounding normal fault system. The step over is defined by the Independence Mountains fault zone and the Bull Runs Mountains fault zone which overlap along strike. Strain is transferred between these major fault segments via and array of northerly striking normal faults with offsets of 10s to 100s of meters and strike lengths of less than 5 km. These faults within the step over are one to two orders of magnitude smaller than the range-bounding fault zones between which they reside. Faults within the broad step define an anticlinal accommodation zone wherein east-dipping faults mainly occupy western half of the accommodation zone and west-dipping faults lie in the eastern half of the accommodation zone. The 3D model of Tuscarora encompasses 70 small-offset normal faults that define the accommodation zone and a portion of the Independence Mountains fault zone, which dips beneath the geothermal field. The geothermal system resides in the axial part of the accommodation, straddling the two fault dip domains. The Tuscarora 3D geologic model consists of 10 stratigraphic units. Unconsolidated Quaternary alluvium has eroded down into bedrock units, the youngest and stratigraphically highest bedrock units are middle Miocene rhyolite and dacite flows regionally correlated with the Jarbidge Rhyolite and modeled with uniform cumulative thickness of ~350 m. Underlying these lava flows are Eocene volcanic rocks of the Big Cottonwood Canyon caldera. These units are modeled as intracaldera deposits, including domes, flows, and thick ash deposits that change in thickness and locally pinch out. The Paleozoic basement of consists metasedimenary and metavolcanic rocks, dominated by argillite, siltstone, limestone, quartzite, and metabasalt of the Schoonover and Snow Canyon Formations. Paleozoic formations are lumped in a single basement unit in the model. Fault blocks in the eastern portion of the model are tilted 5-30 degrees toward the Independence Mountains fault zone. Fault blocks in the western portion of the model are tilted toward steeply east-dipping normal faults. These opposing fault block dips define a shallow extensional anticline. Geothermal production is from 4 closely-spaced wells, that exploit a west-dipping, NNE-striking fault zone near the axial part of the accommodation zone.
Coppo, Nicolas; Girard, Jean-François; Wawrzyniak, Pierre; Hautot, Sophie; Tarits, Pascal; Jacob, Thomas; Martelet, Guillaume; Mathieu, Francis; Gadalia, Alain; Bouchot, Vincent; Traineau, Hervé
2015-01-01T23:59:59.000Z
Within the framework of a global French program oriented towards the development of renewable energies, Martinique Island (Lesser Antilles, France) has been extensively investigated (from 2012 to 2013) through an integrated multi-methods approach, with the aim to define precisely the potential geothermal ressources, previously highlighted (Sanjuan et al., 2003). Amongst the common investigation methods deployed, we carried out three magnetotelluric (MT) surveys located above three of the most promising geothermal fields of Martinique, namely the Anses d'Arlet, the Montagne Pel{\\'e}e and the Pitons du Carbet prospects. A total of about 100 MT stations were acquired showing single or multi-dimensional behaviors and static shift effects. After processing data with remote reference, 3-D MT inversions of the four complex elements of MT impedance tensor without pre-static-shift correction, have been performed for each sector, providing three 3-D resistivity models down to about 12 to 30 km depth. The sea coast effe...
Bechtel, S.E.; Forest, M.G.; Holm, D.D.; Lin, K.J.
1988-01-01T23:59:59.000Z
In this paper we derive one space dimensional, reduced systems of equations (1-D closure models) for viscoelastic free jets. We begin with the three-dimensional system of conservation laws and a Maxwell-Jeffreys constitutive law for an incompressible viscoelastic fluid. First, we exhibit exact truncations to a finite, closed system of 1-D equations based on classical velocity assumptions of von Karman. Next, we demonstrate that the 3-D free surface boundary conditions overconstrain these truncated systems, so that only a very limited class of solutions exist. We then proceed to derive approximate 1-D closure theories through a slender jet asymptotic scaling, combined with appropriate definitions of velocity, pressure and stress unknowns. Our nonaxisymmetric 1-D slender jet models incorporate the physical effects of inertia, viscoelasticity (viscosity, relaxation and retardation), gravity, surface tension, and properties of the ambient fluid, and include shear stresses and time dependence. Previous special 1-D slender jet models correspond to the lowest order equations in the present asymptotic theory by an a posteriori suppression to leading order of some of these effects, and a reduction to axisymmetry. Solutions of the lowest order system of equations in this asymptotic analysis are presented: For the special cases of elliptical inviscid and Newtonian free jets, subject to the effects of surface tension and gravity, our model predicts oscillation of the major axis of the free surface elliptical cross section between perpendicular directions with distance down the jet, and drawdown of the cross section, in agreement with observed behavior. 15 refs.
MPSalsa 3D Simulations of Chemically Reacting Flows
DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]
Many important scientific and engineering applications require a detailed analysis of complex systems with coupled fluid flow, thermal energy transfer, mass transfer and nonequilibrium chemical reactions. Currently, computer simulations of these complex reacting flow problems are limited to idealized systems in one or two spatial dimensions when coupled with a detailed, fundamental chemistry model. The goal of our research is to develop, analyze and implement advanced MP numerical algorithms that will allow high resolution 3D simulations with an equal emphasis on fluid flow and chemical kinetics modeling. In our research, we focus on the development of new, fully coupled, implicit solution strategies that are based on robust MP iterative solution methods (copied from http://www.cs.sandia.gov/CRF/MPSalsa/). These simulations are needed for scientific and technical areas such as: combustion research for transportation, atmospheric chemistry modeling for pollution studies, chemically reacting flow models for analysis and control of manufacturing processes, surface catalytic reactors for methane to methanol conversion and chemical vapor deposition (CVD) process modeling for production of advanced semiconductor materials (http://www.cs.sandia.gov/CRF/MPSalsa/).
This project website provides six QuickTime videos of these simulations, along with a small image gallery and slideshow animations. A list of related publications and conference presentations is also made available.
The 3D Geometry of Dark Matter Halos
J. -F. Becquaert; F. Combes
1997-04-10T23:59:59.000Z
The thickness of the neutral hydrogen layer, coupled with the rotation curve, traces the outer dark matter potential. We estimate the amplitude of the flaring in spiral galaxies from a 3D model of the HI gas. Warps in particular are explicitly parametrized in the form of an harmonical density wave. Applying our method to the galaxy NGC 891, the only model that could fit the observations, and in particular the HI at large height above the plane, includes a strong warp with a line of node almost coinciding with the line of sight. This high-Z HI is not observed at the most extreme velocity channels, those corresponding to high rotational velocities. This is accounted for by the model, since orbits in the tilted planes are not circular, but elongated, with their minor axis in the galaxy plane. Their velocity on the major axis (i.e. at their maximal height above the plane) is then 30% less than in the plane. We finally connect the modelled vertical outer gaseous distribution to the dark matter through hydrodynamical and gravitational equations. Under the assumption of isotropy of the gaseous velocity dispersion, we conclude on a very flattened halo geometry for the galaxy NGC 891 ($q \\approx 0.2$), while a vertical velocity dispersion smaller that the radial one would lead to a less flattened Dark Matter Halo ($q \\approx 0.4-0.5$). Both results however suggests that dark matter is dissipative or has been strongly influenced by the gas dynamics.
3-D Finite Element Analyses of the Egan Cavern Field
Klamerus, E.W.; Ehgartner, B.L.
1999-02-01T23:59:59.000Z
Three-dimensional finite element analyses were performed for the two gas-filled storage caverns at the Egan field, Jennings dome, Louisiana. The effects of cavern enlargement on surface subsidence, storage loss, and cavern stability were investigated. The finite element model simulated the leaching of caverns to 6 and 8 billion cubic feet (BCF) and examined their performance at various operating conditions. Operating pressures varied from 0.15 psi/ft to 0.9 psi/ft at the bottom of the lowest cemented casing. The analysis also examined the stability of the web or pillar of salt between the caverns under differential pressure loadings. The 50-year simulations were performed using JAC3D, a three dimensional finite element analysis code for nonlinear quasistatic solids. A damage criterion based on onset of dilatancy was used to evaluate cavern instability. Dilation results from the development of microfractures in salt and, hence, potential increases in permeability onset occurs well before large scale failure. The analyses predicted stable caverns throughout the 50-year period for the range of pressures investigated. Some localized salt damage was predicted near the bottom walls of the caverns if the caverns are operated at minimum pressure for long periods of time. Volumetric cavern closures over time due to creep were moderate to excessive depending on the salt creep properties and operating pressures. However, subsidence above the cavern field was small and should pose no problem, to surface facilities.
Airport Viz - a 3D Tool to Enhance Security Operations
Koch, Daniel B [ORNL
2006-01-01T23:59:59.000Z
In the summer of 2000, the National Safe Skies Alliance (NSSA) awarded a project to the Applied Visualization Center (AVC) at the University of Tennessee, Knoxville (UTK) to develop a 3D computer tool to assist the Federal Aviation Administration security group, now the Transportation Security Administration (TSA), in evaluating new equipment and procedures to improve airport checkpoint security. A preliminary tool was demonstrated at the 2001 International Aviation Security Technology Symposium. Since then, the AVC went on to construct numerous detection equipment models as well as models of several airports. Airport Viz has been distributed by the NSSA to a number of airports around the country which are able to incorporate their own CAD models into the software due to its unique open architecture. It provides a checkpoint design and passenger flow simulation function, a layout design and simulation tool for checked baggage and cargo screening, and a means to assist in the vulnerability assessment of airport access points for pedestrians and vehicles.
GPU-accelerated denoising of 3D magnetic resonance images
Howison, Mark; Wes Bethel, E.
2014-05-29T23:59:59.000Z
The raw computational power of GPU accelerators enables fast denoising of 3D MR images using bilateral filtering, anisotropic diffusion, and non-local means. In practice, applying these filtering operations requires setting multiple parameters. This study was designed to provide better guidance to practitioners for choosing the most appropriate parameters by answering two questions: what parameters yield the best denoising results in practice? And what tuning is necessary to achieve optimal performance on a modern GPU? To answer the first question, we use two different metrics, mean squared error (MSE) and mean structural similarity (MSSIM), to compare denoising quality against a reference image. Surprisingly, the best improvement in structural similarity with the bilateral filter is achieved with a small stencil size that lies within the range of real-time execution on an NVIDIA Tesla M2050 GPU. Moreover, inappropriate choices for parameters, especially scaling parameters, can yield very poor denoising performance. To answer the second question, we perform an autotuning study to empirically determine optimal memory tiling on the GPU. The variation in these results suggests that such tuning is an essential step in achieving real-time performance. These results have important implications for the real-time application of denoising to MR images in clinical settings that require fast turn-around times.
Robust inversion, dimensionality reduction, and randomized sampling
Aleksandr Aravkin
2011-11-17T23:59:59.000Z
Nov 17, 2011 ... Keywords: inverse problems, seismic inversion, stochastic optimization, robust estimation. Category 1: Nonlinear Optimization. Category 2: ...
Stochastic Joint Inversion for Integrated Data Interpretation...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Stochastic Joint Inversion for Integrated Data Interpretation in Geothermal Exploration Stochastic Joint Inversion for Integrated Data Interpretation in Geothermal Exploration...
Infrared modification of gravity from conformal symmetry
Gegenberg, Jack; Seahra, Sanjeev S
2015-01-01T23:59:59.000Z
We reconsider a gauge theory of gravity in which the gauge group is the conformal group SO(4,2) and the action is of the Yang-Mills form, quadratic in the curvature. The resulting gravitational theory exhibits local conformal symmetry and reduces to Weyl-squared gravity under certain conditions. When the theory is linearized about flat spacetime, we find that matter which couples to the generators of special conformal transformations reproduces Newton's inverse square law. Conversely, matter which couples to generators of translations induces a constant and possibly repulsive force far from the source, which may be relevant for explaining the late time acceleration of the universe. The coupling constant of theory is dimensionless, which means that it is potentially renormalizable.
Seismic Attenuation Inversion with t* Using tstarTomog.
Preston, Leiph
2014-09-01T23:59:59.000Z
Seismic attenuation is defined as the loss of the seismic wave amplitude as the wave propagates excluding losses strictly due to geometric spreading. Information gleaned from seismic waves can be utilized to solve for the attenuation properties of the earth. One method of solving for earth attenuation properties is called t*. This report will start by introducing the basic theory behind t* and delve into inverse theory as it pertains to how the algorithm called tstarTomog inverts for attenuation properties using t* observations. This report also describes how to use the tstarTomog package to go from observed data to a 3-D model of attenuation structure in the earth.
Pointwise Fourier Inversion: a Wave Equation Approach
Pointwise Fourier Inversion: a Wave Equation Approach Mark A. Pinsky 1 Michael E. Taylor 2. A general criterion for pointwise Fourier inversion 2. Pointwise Fourier inversion on R n (n = 3) 3. Fourier inversion on R 2 4. Fourier inversion on R n (general n) 5. Fourier inversion on spheres 6. Fourier
Einstein Gravity, Massive Gravity, Multi-Gravity and Nonlinear Realizations
Garrett Goon; Kurt Hinterbichler; Austin Joyce; Mark Trodden
2014-12-18T23:59:59.000Z
The existence of a ghost free theory of massive gravity begs for an interpretation as a Higgs phase of General Relativity. We revisit the study of massive gravity as a Higgs phase. Absent a compelling microphysical model of spontaneous symmetry breaking in gravity, we approach this problem from the viewpoint of nonlinear realizations. We employ the coset construction to search for the most restrictive symmetry breaking pattern whose low energy theory will both admit the de Rham--Gabadadze--Tolley (dRGT) potentials and nonlinearly realize every symmetry of General Relativity, thereby providing a new perspective from which to build theories of massive gravity. In addition to the known ghost-free terms, we find a novel parity violating interaction which preserves the constraint structure of the theory, but which vanishes on the normal branch of the theory. Finally, the procedure is extended to the cases of bi-gravity and multi-vielbein theories. Analogous parity violating interactions exist here, too, and may be non-trivial for certain classes of multi-metric theories.
Evolving Design Rules for the Inverse Granular Packing Problem
Marc Z. Miskin; Heinrich M. Jaeger
2014-03-17T23:59:59.000Z
If a collection of identical particles is poured into a container, different shapes will fill to different densities. But what is the shape that fills a container as close as possible to a pre-specified, desired density? We demonstrate a solution to this inverse-packing problem by framing it in the context of artificial evolution. By representing shapes as bonded spheres, we show how shapes may be mutated, simulated, and selected to produce particularly dense or loose packing aggregates, both with and without friction. Moreover, we show how motifs emerge linking these shapes together. The result is a set of design rules that function as an effective solution to the inverse packing problem for given packing procedures and boundary conditions. Finally, we show that these results are verified by experiments on 3D-printed prototypes used to make packings in the real world.
Classifying Supersymmetric Solutions in 3D Maximal Supergravity
Jan de Boer; Daniel R. Mayerson; Masaki Shigemori
2014-11-18T23:59:59.000Z
String theory contains various extended objects. Among those, objects of codimension two (such as the D7-brane) are particularly interesting. Codimension two objects carry non-Abelian charges which are elements of a discrete U-duality group and they may not admit a simple space-time description, in which case they are known as exotic branes. A complete classification of consistent codimension two objects in string theory is missing, even if we demand that they preserve some supersymmetry. As a step toward such a classification, we study the supersymmetric solutions of 3D maximal supergravity, which can be regarded as approximate description of the geometry near codimension two objects. We present a complete classification of the types of supersymmetric solutions that exist in this theory. We found that this problem reduces to that of classifying nilpotent orbits associated with the U-duality group, for which various mathematical results are known. We show that the only allowed supersymmetric configurations are 1/2, 1/4, 1/8, and 1/16 BPS, and determine the nilpotent orbits that they correspond to. One example of 1/16 BPS configurations is a generalization of the MSW system, where momentum runs along the intersection of seven M5-branes. On the other hand, it turns out exceedingly difficult to translate this classification into a simple criterion for supersymmetry in terms of the non-Abelian (monodromy) charges of the objects. For example, it can happen that a supersymmetric solution exists locally but cannot be extended all the way to the location of the object. To illustrate the various issues that arise in constructing supersymmetric solutions, we present a number of explicit examples.
Three-dimensional induced polarization data inversion for complex resistivity
Commer, M.; Newman, G.A.; Williams, K.H.; Hubbard, S.S.
2011-03-15T23:59:59.000Z
The conductive and capacitive material properties of the subsurface can be quantified through the frequency-dependent complex resistivity. However, the routine three-dimensional (3D) interpretation of voluminous induced polarization (IP) data sets still poses a challenge due to large computational demands and solution nonuniqueness. We have developed a flexible methodology for 3D (spectral) IP data inversion. Our inversion algorithm is adapted from a frequency-domain electromagnetic (EM) inversion method primarily developed for large-scale hydrocarbon and geothermal energy exploration purposes. The method has proven to be efficient by implementing the nonlinear conjugate gradient method with hierarchical parallelism and by using an optimal finite-difference forward modeling mesh design scheme. The method allows for a large range of survey scales, providing a tool for both exploration and environmental applications. We experimented with an image focusing technique to improve the poor depth resolution of surface data sets with small survey spreads. The algorithm's underlying forward modeling operator properly accounts for EM coupling effects; thus, traditionally used EM coupling correction procedures are not needed. The methodology was applied to both synthetic and field data. We tested the benefit of directly inverting EM coupling contaminated data using a synthetic large-scale exploration data set. Afterward, we further tested the monitoring capability of our method by inverting time-lapse data from an environmental remediation experiment near Rifle, Colorado. Similar trends observed in both our solution and another 2D inversion were in accordance with previous findings about the IP effects due to subsurface microbial activity.
New Massive Gravity and AdS{sub 4} Counterterms
Jatkar, Dileep P. [Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad, 211019 (India); Sinha, Aninda [Centre for High Energy Physics, Indian Institute of Science, C. V. Raman Avenue, Bangalore 560012 (India)
2011-04-29T23:59:59.000Z
We show that the recently proposed Dirac-Born-Infeld extension of new massive gravity emerges naturally as a counterterm in four-dimensional anti-de Sitter space (AdS{sub 4}). The resulting on-shell Euclidean action is independent of the cutoff at zero temperature. We also find that the same choice of counterterm gives the usual area law for the AdS{sub 4} Schwarzschild black hole entropy in a cutoff-independent manner. The parameter values of the resulting counterterm action correspond to a c=0 theory in the context of the duality between AdS{sub 3} gravity and two-dimensional conformal field theory. We rewrite this theory in terms of the gauge field that is used to recast 3D gravity as a Chern-Simons theory.
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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMForms About Batteriesmetal-organic frameworks EFRC 1001 wordInverse
Zero gravity two-phase flow regime transition modeling compared with data and relap5-3d predictions
Ghrist, Melissa Renee
2009-05-15T23:59:59.000Z
). The code was developed to couple the reactor cooling system and the core in order to simulate transients in light water reactor (LWR) systems. These transients include loss of coolant accidents (LOCA), anticipated transients without scram (ATWS...
Krylov Techniques for 3D Problems in Transport Theory
Ruben Panta Pazos [Department of Mathematics, UNISC - Universidade de Santa Cruz do Sul Av. Independencia, 2293 Bairro Universitario (Brazil)
2006-07-01T23:59:59.000Z
When solving integral-differential equations by means of numerical methods one has to deal with large systems of linear equations, such as happens in transport theory [10]. Many iterative techniques are now used in Transport Theory in order to solve problems of 2D and 3D dimensions. In this paper, we choose two problems to solve the following transport equation, [Equation] where x: represents the spatial variable, {mu}: the cosine of the angle, {psi}: the angular flux, h(x, {mu}): is the collision frequency, k(x, {mu}, {mu}'): the scattering kernel, q(x, {mu}): the source. The aim of this work is the straightforward application of the Krylov spaces technique [2] to the governing equation or to its discretizations derived of the discrete ordinates method (choosing a finite number of directions and then approximating the integral term by means of a proper sum). The equation (1) can be written in functional form as [Equation] with {psi} in the Hilbert space L{sup 2} ([0,a] x [-1,1])., and q is the source function. The operator derived from a discrete ordinates scheme that approximates the operator [Equation] generates the following subspace [Equation] i.e. the subspace generated by the iterations of order 0, 1, 2,..., m-1 of the source function q. Two methods are specially outstanding, the Lanczos method to solve the problem given by equation (2) with certain boundary conditions, and the conjugate gradient method to solve the same problem with identical boundary conditions. We discuss and accelerate the basic iterative method [8]. An important conclusion is the generation of these methods to solve linear systems in Hilbert spaces, if verify the convergence conditions, which are outlined in this work. The first problem is a cubic domain with two regions, one with a source near the vertex at the origin and the shield region. In this case, the Cartesian planes (specifically 0
[12.7.20044:01pm] [101114] [Page No. 101] {Eserial}4393-van-Pelt/3d/vanPelt-tx08.3d Van Pelt
Stryker, Michael
. Prog Brain Res.147:103-114. Corrections indicated in red. #12;[12.7.20044:01pm] [101114] [Page No[12.7.20044:01pm] [101114] [Page No. 101] {Eserial}4393-van-Pelt/3d/vanPelt-tx08.3d Van Pelt U N Research, Vol. 147 ISSN 0079-6123 Copyright ß 2005 Elsevier BV. All rights reserved CHAPTER 8 Molecular
A simple backprojection algorithm for 3D in vivo EPID dosimetry of IMRT treatments
Wendling, Markus; McDermott, Leah N.; Mans, Anton; Sonke, Jan-Jakob; Herk, Marcel van; Mijnheer, Ben J. [Department of Radiation Oncology, Netherlands Cancer Institute-Antoni van Leeuwenhoek Hospital, Plesmanlaan 121, 1066 CX Amsterdam (Netherlands)
2009-07-15T23:59:59.000Z
Treatment plans are usually designed, optimized, and evaluated based on the total 3D dose distribution, motivating a total 3D dose verification. The purpose of this study was to develop a 2D transmission-dosimetry method using an electronic portal imaging device (EPID) into a simple 3D method that provides 3D dose information. In the new method, the dose is reconstructed within the patient volume in multiple planes parallel to the EPID for each gantry angle. By summing the 3D dose grids of all beams, the 3D dose distribution for the total treatment fraction is obtained. The algorithm uses patient contours from the planning CT scan but does not include tissue inhomogeneity corrections. The 3D EPID dosimetry method was tested for IMRT fractions of a prostate, a rectum, and a head-and-neck cancer patient. Planned and in vivo-measured dose distributions were within 2% at the dose prescription point. Within the 50% isodose surface of the prescribed dose, at least 97% of points were in agreement, evaluated with a 3D {gamma} method with criteria of 3% of the prescribed dose and 0.3 cm. Full 3D dose reconstruction on a 0.1x0.1x0.1 cm{sup 3} grid and 3D {gamma} evaluation took less than 15 min for one fraction on a standard PC. The method allows in vivo determination of 3D dose-volume parameters that are common in clinical practice. The authors conclude that their EPID dosimetry method is an accurate and fast tool for in vivo dose verification of IMRT plans in 3D. Their approach is independent of the treatment planning system and provides a practical safety net for radiotherapy.
Inverse problem for Bremsstrahlung radiation
Voss, K.E.; Fisch, N.J.
1991-10-01T23:59:59.000Z
For certain predominantly one-dimensional distribution functions, an analytic inversion has been found which yields the velocity distribution of superthermal electrons given their Bremsstrahlung radiation. 5 refs.
Inverse Problems in Transport Theory
The inverse scattering problem for (2.1) is the following: Does S determine ...... J. Voigt, Spectral properties of the neutron transport equation, J. Math. Anal. Appl.
Next Generation Lunch: Revealing the World’s First 3D Printed Car (text version)
Broader source: Energy.gov [DOE]
Below is the text version for the Next Generation Lunch: Revealing the World’s First 3D Printed Car Video.
Engineering Magnetic Anisotropy in Nanostructured 3d and 4f Ferromagnets
Hsu, Chin-Jui
2012-01-01T23:59:59.000Z
Magnetic 3d transition and 4f rare earth elements are being studied for use in various applications including magentocaloric refrigeration [
algorithm imf-osem 3d: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
partial similarities Andrzejak, Artur 45 Finite-difference migration of 3-D seismic data with a parallel algorithm CiteSeer Summary: INTRODUCTION Imaging within complex...
MT3D: a 3 dimensional magnetotelluric modeling program (user's guide and documentation for Rev. 1)
Nutter, C.; Wannamaker, P.E.
1980-11-01T23:59:59.000Z
MT3D.REV1 is a non-interactive computer program written in FORTRAN to do 3-dimensional magnetotelluric modeling. A 3-D volume integral equation has been adapted to simulate the MT response of a 3D body in the earth. An integro-difference scheme has been incorporated to increase the accuracy. This is a user's guide for MT3D.REV1 on the University of Utah Research Institute's (UURI) PRIME 400 computer operating under PRIMOS IV, Rev. 17.
Integrating Data Clustering and Visualization for the Analysis of 3D Gene Expression Data
2009-01-01T23:59:59.000Z
ON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS [6] C. C.ON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS Integrating DataON COMPUTATIONAL BIOLOGY AND BIOINFORMATICS Fig. 1. 3D
Particle Dynamics And Emergent Gravity
Amir H. Fatollahi
2008-05-08T23:59:59.000Z
The emergent gravity proposal is examined within the framework of noncommutative QED/gravity correspondence from particle dynamics point of view.
Circularly symmetric solutions in three-dimensional Teleparallel, f(T) and Maxwell-f(T) gravity
P. A. Gonzalez; Emmanuel N. Saridakis; Yerko Vasquez
2012-07-10T23:59:59.000Z
We present teleparallel 3D gravity and we extract circularly symmetric solutions, showing that they coincide with the BTZ and Deser-de-Sitter solutions of standard 3D gravity. However, extending into f(T) 3D gravity, that is considering arbitrary functions of the torsion scalar in the action, we obtain BTZ-like and Deser-de-Sitter-like solutions, corresponding to an effective cosmological constant, without any requirement of the sign of the initial cosmological constant. Finally, extending our analysis incorporating the electromagnetic sector, we show that Maxwell-f(T) gravity accepts deformed charged BTZ-like solutions. Interestingly enough, the deformation in this case brings qualitatively novel terms, contrary to the pure gravitational solutions where the deformation is expressed only through changes in the coefficients. We investigate the singularities and the horizons of the new solutions, and amongst others we show that the cosmic censorship can be violated. Such novel behaviors reveal the new features that the f(T) structure brings in 3D gravity.
He, Wei (New Milford, NJ); Anderson, Roger N. (New York, NY)
1998-01-01T23:59:59.000Z
A method is disclosed for inverting 3-D seismic reflection data obtained from seismic surveys to derive impedance models for a subsurface region, and for inversion of multiple 3-D seismic surveys (i.e., 4-D seismic surveys) of the same subsurface volume, separated in time to allow for dynamic fluid migration, such that small scale structure and regions of fluid and dynamic fluid flow within the subsurface volume being studied can be identified. The method allows for the mapping and quantification of available hydrocarbons within a reservoir and is thus useful for hydrocarbon prospecting and reservoir management. An iterative seismic inversion scheme constrained by actual well log data which uses a time/depth dependent seismic source function is employed to derive impedance models from 3-D and 4-D seismic datasets. The impedance values can be region grown to better isolate the low impedance hydrocarbon bearing regions. Impedance data derived from multiple 3-D seismic surveys of the same volume can be compared to identify regions of dynamic evolution and bypassed pay. Effective Oil Saturation or net oil thickness can also be derived from the impedance data and used for quantitative assessment of prospective drilling targets and reservoir management.
He, W.; Anderson, R.N.
1998-08-25T23:59:59.000Z
A method is disclosed for inverting 3-D seismic reflection data obtained from seismic surveys to derive impedance models for a subsurface region, and for inversion of multiple 3-D seismic surveys (i.e., 4-D seismic surveys) of the same subsurface volume, separated in time to allow for dynamic fluid migration, such that small scale structure and regions of fluid and dynamic fluid flow within the subsurface volume being studied can be identified. The method allows for the mapping and quantification of available hydrocarbons within a reservoir and is thus useful for hydrocarbon prospecting and reservoir management. An iterative seismic inversion scheme constrained by actual well log data which uses a time/depth dependent seismic source function is employed to derive impedance models from 3-D and 4-D seismic datasets. The impedance values can be region grown to better isolate the low impedance hydrocarbon bearing regions. Impedance data derived from multiple 3-D seismic surveys of the same volume can be compared to identify regions of dynamic evolution and bypassed pay. Effective Oil Saturation or net oil thickness can also be derived from the impedance data and used for quantitative assessment of prospective drilling targets and reservoir management. 20 figs.
Inter-layer Vias and TESH Interconnection Network for 3-D Heterogeneous Sensor System on a Chip
Chapman, Glenn H.
3D Heterogeneous system on a chip Unattended Ground Sensor Technologies and Applications VII, edited
Chen, Tsuhan
for commercialization 3D Printing Novel Technology Award $10,000 (direct costs) with use of the New CTSC 3D Printing with 3D printing technology in order to rapidly develop novel biomedical products with application) and importance of funding to feasibility of the project Research Plan (use of the CTSC 3D Printing Core Facility
Image-based stochastic modeling of the 3D morphology of energy materials on various length scales
Schmidt, Volker
, to appear 3D image of uncompressed graphite electrode used in Li-ion batteries tomography: Helmholtz Center, 2013 | Volker Schmidt Contents Introduction 3D microstructure of uncompressed graphite electrodes 3D microstructure of compressed graphite electrodes 3D morphology of hybrid organic solar cells Charge transport
State-of-the-Art 3-D Assessment of Elements Degrading TBR of
accurate modeling of complex devices by integrating CAD geometry directly with 3-D MCNP code. · To point presentation of blanket geometry with high fidelity in 3-D TBR results. #12;6 Stepwise Approach Build CAD of Fusion Energy August 27- 31, 2012 Nashville, TN, USA #12;2 ARIES Designs (1988 2012) #12;3 ARIES
Measurements from 3D-CT renderings are used in research and clinical management
Vorperian, Houri K.
Measurements from 3D-CT renderings are used in research and clinical management: · Characterization for the prism]) RENDERING TECHNIQUES USED in ANALYZE 10.0: - Volume Render - (2) Volumes of Interest 1) VOI-Auto & 2) VOI-Manual TOTAL 3D-CT MODELS: 3 mandibles X 18 CT series X 3 rendering techniques = 162 mandible
Pencil-Like Sketch Rendering of 3D Scenes Using Trajectory Planning and Dynamic Tracking
Kara, Levent Burak
Pencil-Like Sketch Rendering of 3D Scenes Using Trajectory Planning and Dynamic Tracking Günay non-photorealistic rendering method to render 3D scenes in the form of pencil-like sketches. This work then produces the rendered sketch, whose characteristics can be adjusted with a set of trajectory and tracking
220 Index MTL ANNUAL RESEARCH REPORT 2014 3D printing 53
Reif, Rafael
220 Index MTL ANNUAL RESEARCH REPORT 2014 Index Symbols 3D 33 3D printing 53 Integrated circuits 13 Electrospinning 58 Electrospray 60 Electrostatic speakers 49 Endoscopy 132 Energy 79, 87 Efficiency 16 Energy Frontier Research Center for Excitonics 117, 210 Energy harvesting 85 Englund, Dirk R. vi, 117, 180 Erbium
Fast multipole method applied to 3D frequency domain elastodynamics 1
Paris-Sud XI, Université de
Fast multipole method applied to 3D frequency domain elastodynamics 1 J.A. Sanz a , M. Bonnet b,, J and implementation of a fast multipole- accelerated BEM for 3-D elastodynamics in the frequency domain, based is never explicitly formed. The truncation parameter in the multipole expansion is adjusted to the level
IEEE TRANSACTIONS ON ROBOTICS 1 Needle Steering in 3D via Rapid Replanning
Alterovitz, Ron
Plan Execute Control PredictionActual Model Generate Multiple Plans Fig. 1. Closed-loop needle steeringIEEE TRANSACTIONS ON ROBOTICS 1 Needle Steering in 3D via Rapid Replanning Sachin Patil Member steering system capable of automatically reaching targets in 3D environments while avoiding obstacles
Feedback Control for Steering Needles Through 3D Deformable Tissue Using Helical Paths
O'Brien, James F.
Feedback Control for Steering Needles Through 3D Deformable Tissue Using Helical Paths Kris Hauser controller that steers a needle along 3D helical paths, and varies the helix radius to correct a model predictive control framework that chooses a needle twist rate such that the predicted helical
Generalized 3-D Tolerance Analysis of Mechanical Assemblies with Small Kinematic Adjustments
) for tolerance analysis of 3-D mechanical assemblies is presented. Vector assembly models are used, based on 3-D. Tolerance analysis procedures are formulated for both open and closed loop assembly models. The method generalizes assembly variation models to include small kinematic adjustments between mating parts. Open vector
Model for the prediction of 3D surface topography in 5-axis milling
Paris-Sud XI, Université de
1 Model for the prediction of 3D surface topography in 5-axis milling Sylvain Lavernhe LURPA - ENS surface topography obtained in 5-axis milling in function of the machining conditions. For this purpose to a feed rate prediction model. Thanks to the simulation model of 3D surface topography, the influence
SHELL THEORIES ARISING AS LOW ENERGY -LIMIT OF 3D NONLINEAR ELASTICITY
Lewicka, Marta
SHELL THEORIES ARISING AS LOW ENERGY -LIMIT OF 3D NONLINEAR ELASTICITY MARTA LEWICKA, MARIA to minimizers of suitable lower dimensional limit energies. In this paper we discuss shell theories arising of -limit) of the 3d nonlinear elasticity for thin shells around an arbitrary smooth 2d surface
SIMULATION OF GEOMETRY AND SHADOW EFFECTS IN 3D ORGANIC POLYMER SOLAR CELLS
Kassegne, Samuel Kinde
levels of Solar panels and new production capacity is driving solar PV prices lower and thereby, bringingSIMULATION OF GEOMETRY AND SHADOW EFFECTS IN 3D ORGANIC POLYMER SOLAR CELLS OF THE THESIS Simulation of Geometry and Shadow Effects in 3D Organic Polymer Solar Cells by Mihir Prakashbhai
PHOTOREALISTIC BUILDING MODELING AND VISUALIZATION IN 3-D GEOSPATIAL INFORMATION SYSTEM
Shan, Jie
PHOTOREALISTIC BUILDING MODELING AND VISUALIZATION IN 3-D GEOSPATIAL INFORMATION SYSTEM Yonghak: Despite geospatial information systems are widely used in many different fields as a powerful tool in geospatial information system (GIS). Such 3-D photorealistic visualization is able to provide geospatial
3D Scanning Technology as a Standard Archaeological Tool for Pottery Analysis: Practice and Theory
3D Scanning Technology as a Standard Archaeological Tool for Pottery Analysis: Practice and Theory project, where 3D scanning technology, and newly developed software to optimally identify the rotation potsherds from several sites and periods were scanned, their symmetry axis computed, and their mean profiles
LASER SCANNING AND NOISE REDUCTION APPLIED TO 3D ROAD SURFACE ANALYSIS
Giger, Christine
LASER SCANNING AND NOISE REDUCTION APPLIED TO 3D ROAD SURFACE ANALYSIS Thorsten Schulz and Hilmar, EAWAG Email: michele.steiner@eawag.ch Abstract: Terrestrial laser scanning was applied to acquire 3D the catchment area of a road with respect to a pilot plant. As laser scanning requires only a few minutes
A New Constraint Solver for 3D Lattices and its Application to the Protein Folding Problem
Dal PalĂą, Alessandro
Department of Computer Science Universit`a di Udine New Mexico State University (dalpalu scientists have agreed that the answer to the folding problem lies in the concept of the energy state of the amino acid sequence in the 3D space with minimum energy state. According to this theory, the 3D
Surface Shape Description of 3D Data from Under Vehicle Inspection Robot
Abidi, Mongi A.
Surface Shape Description of 3D Data from Under Vehicle Inspection Robot Sreenivas R. Sukumar1 capabilities to a multi-modal under vehicle inspection robot. In this paper, we outline the various design challenges towards the automation of the 3D scene modeling task. We employ laser-based range imaging
An estimation algorithm for 3-D pose measurement using redundant ultrasonic sensors
Branum, Brian Howell
1998-01-01T23:59:59.000Z
precise precise but expensive sensing equipment to attain range measuring instruments to triangulate an accurate 3-D more sensors than are necessary for a single 3-D pose measurement. If the pose by including expected errors could be modeled with a...
Modeling 3D animals from a side-view sketch Even Entema,b
Barthe, LoĂŻc
Modeling 3D animals from a side-view sketch Even Entema,b , Loic Barthea , Marie-Paule Canib. This paper tackles the problem of creating 3D models of animals from a single, side-view sketch. We use be an important step for generat- ing more lively virtual worlds. Animals are also among the models
FINITE ENERGY SOLUTIONS OF MIXED 3D DIV-CURL SYSTEMS
Auchmuty, Giles
FINITE ENERGY SOLUTIONS OF MIXED 3D DIV-CURL SYSTEMS GILES AUCHMUTY AND JAMES C. ALEXANDER Abstract. This paper describes the existence and representation of certain finite energy (L2 -) solutions of weighted div-curl systems on bounded 3d regions with C2 -boundaries and mixed boundary data. Necessary
Control Method for a 3D Form Display with Coil-type Shape Memory Alloy
Tachi, Susumu
Control Method for a 3D Form Display with Coil-type Shape Memory Alloy Masashi Nakatani1 , Hiroyuki.t.u-tokyo.ac.jp Abstract - We previously proposed a new 3D form display actuated by shape memory alloy (SMA), which of the shape memory alloy with a simple matrix drive circuit. This type of drive circuit can dramatically
A 3-D constitutive model for shape memory alloys incorporating pseudoelasticity and
Popov, Peter
A 3-D constitutive model for shape memory alloys incorporating pseudoelasticity and detwinning&M University, TX 77843-3404, USA Abstract A 3-D constitutive model for polycrystalline Shape Memory Alloys demonstrate the capabilities of the model. Key words: Shape Memory Alloy, reorientation, detwinning 1
Projecting 2D Gene Expression Data Into 3D and 4D Space
Vize, Peter D.
imaging of wholemount stained sam- ples. The two-dimensional images thus generated are, in fact games typically generate virtual 3D objects by texture mapping an image onto a 3D polygonal frame mapping images of gene expression data onto b-spline based embryo models. This approach, known as UV
A Robust Boundary Detection Algorithm Based on Connectivity Only for 3D Wireless Sensor Networks
Jin, Miao
A Robust Boundary Detection Algorithm Based on Connectivity Only for 3D Wireless Sensor Networks algorithm, dubbed Coconut, for 3D wireless sensor networks. It first constructs a tetrahedral structure known in practical wireless sensor networks. Third, it is robust to sensor distribution, effectively
Task-Sensitive Cinematography Interfaces for Interactive 3D Learning Environments
Zettlemoyer, Luke
Task-Sensitive Cinematography Interfaces for Interactive 3D Learning Environments William H. Bares, a cinematography interface to 3D learning environments can dynamicallyplan camera positions,viewdirections, and cam modeling framework on student-environmentinteractions, we have constructed a full- scale cinematography
FishTank Fitts: A Desktop VR Testbed for Evaluating 3D Pointing Techniques
Stürzlinger, Wolfgang
FishTank Fitts: A Desktop VR Testbed for Evaluating 3D Pointing Techniques Abstract We present a desktop or "fish tank" virtual reality system for evaluating 3D selection techniques. Motivated version of the ISO 9241-9 pointing task. Targets can be displayed stereoscopically, with head
Detection and extraction of fault surfaces in 3D seismic data Israel Cohen1
Cohen, Israel
for seismic interpretation. INTRODUCTION Fault surfaces are common subterranean structures that are asso that are unrelated to faults. Furthermore, creating a consistent geological interpretation from large 3D-seismicDetection and extraction of fault surfaces in 3D seismic data Israel Cohen1 , Nicholas Coult2
Methods Mol Biol . Author manuscript 3D structural models of transmembrane proteins
Paris-Sud XI, Université de
proteins is a major research area. Due to the lack of available 3D structures, automatic homology modelingMethods Mol Biol . Author manuscript Page /1 9 3D structural models of transmembrane proteins: Alexandre De Brevern Abstract Summary Transmembrane proteins
STATISTICAL AND 3D NONLINEAR FINITE ELEMENT ANALYSIS OF SCHLEGEIS DAM
Balaji, Rajagopalan
STATISTICAL AND 3D NONLINEAR FINITE ELEMENT ANALYSIS OF SCHLEGEIS DAM VICTOR SAOUMA, ERIC HANSEN is composed of two parts. First a statistical analysis of the dam crest displacement is performed, along with a prediction for the years 2000-2001. Then a 3D finite element analysis of Schlegeis dam is performed using
Paris-Sud XI, Université de
IAPRS, Vol. XXXIII, Amsterdam, 2000 MODELLING HISTORIC SITES AND MONUMENTS IN 3D HERITAGE.u-strasbg.fr TC V-8 Site recording and modelling TC V-10 World Cultural heritage and information ABSTRACT The modelling of 3D objects in surveying and particularly of historic monuments is generally
Thermal-Aware Cell and Through-Silicon-Via Co-Placement for 3D ICs
Cong, Jason "Jingsheng"
that when the TSV area in each bin is proportional to the lumped power consumption in that bin, together implement a thermal- aware 3D placement tool. Compared to the methods that prefer a uniform powerThermal-Aware Cell and Through-Silicon-Via Co-Placement for 3D ICs Jason Cong, 1,2 Guojie Luo, 1
A Sample-based Convex Cover for Rapidly Finding an Object in a 3-D Environment
Hutchinson, Seth
A Sample-based Convex Cover for Rapidly Finding an Object in a 3-D Environment Alejandro Sarmientoy in a known 3-D environment as quickly as possible on average. We use a sampling scheme that generates of scaling well with the dimensionality of the environment. We then use the resulting convex covering to gen
MultiFab : a multi-material 3D printing platform
Ramos-Maltés, Javier Eduardo
2014-01-01T23:59:59.000Z
This thesis presents the development of MultiFab, a multi-material 3D printing architecture that is high-resolution, scalable, and low-cost. MultiFab enables the 3D printing of parts with materials that interact optically ...
Simulation of chemical vapor infiltration and deposition based on 3D images: a local scale approach
Boyer, Edmond
infiltration of ceramic matrix composites is presented. This computational model requires a 3D representation/reaction problems; Random walks; 3D image-based modeling 1. Introduction Ceramic Matrix Composites and Carbon with a matrix. One of the most efficient ones is Chemical Vapor Infiltration (CVI), by which gaseous precursors
Accepted in Methods Mol Biol. 2010 3D-structural models of transmembrane proteins.
Paris-Sud XI, Université de
of transmembrane proteins is a major research area. Due to the lack of available 3D structures, automatic homology1 Accepted in Methods Mol Biol. 2010 3D-structural models of transmembrane proteins. Alexandre G proteins are macromolecules implicated in major biological process and diseases. Due to their specific
FABRICATION AND CHARACTERIZATION OF 3-D ALL POLYMER FLEXIBLE SOLAR CELL
Kassegne, Samuel Kinde
FABRICATION AND CHARACTERIZATION OF 3-D ALL POLYMER FLEXIBLE SOLAR CELL _______________ A Thesis and Characterization of 3-D All Polymer Flexible Solar Cell by Krishna Ashwinbhai Desai Master of Science in Mechanical (Polyethylene terephthalate) as a flexible substrate, a potentially wearable organic solar cell is enabled
Yoo, S. J. Ben
PLC Binbin Guan,1 Ryan P. Scott,1 Nicolas K. Fontaine,2 Tiehui Su,1 Carlo Ferrari,3 Mark Cappuzzo,3 on a silica planar lightwave circuit (PLC) coupled to a 3-D photonic circuit that efficiently generates planar lightwave circuit (PLC) with a silica 3-D PIC that supports up to 15 OAM modes, both TE and TM
XEDS STEM Tomography For 3D Chemical Characterization Of Nanoscale Particles
Genc, Arda; Kovarik, Libor; Gu, Meng; Cheng, Huikai; Plachinda, Pavel; Pullan, Lee; Freitag, Bert; Wang, Chong M.
2013-08-01T23:59:59.000Z
We present a tomography technique which couples scanning transmission electron microscopy (STEM) and X-ray energy dispersive spectrometry (XEDS) to resolve 3D distribution of elements in nanoscale materials. STEM imaging when combined with a symmetrically arranged XEDS detector design around the specimen overcomes many of the obstacles in 3D spectroscopic tomography of nanoscale materials and successfully elucidate the 3D chemical information in a large field of view of the TEM sample. We employed this technique to investigate 3D distribution of Nickel (Ni), Manganese (Mn) and Oxygen (O) in Li(NiMn)O2 battery cathode material. For this purpose, 2D elemental maps were acquired for a range of tilt angles and reconstructed to obtain 3D elemental distribution in an isolated Li(NiMnO2) nanoparticle. The results highlight the strength of this technique in 3D chemical analysis of nanoscale materials by successfully resolving Ni, Mn and O elemental distributions in 3D and discovering the new phenomenon of Ni surface segregation in this material. Furthermore, the comparison of simultaneously acquired HAADF STEM and XEDS STEM tomography results show that XEDS STEM tomography provides additional 3D chemical information of the material especially when there is low atomic number (Z) contrast in the material of interest.
Thermal Simulation of Laser Annealing for 3D Integration B. Rajendran, S. H. Jain1
Pease, R. Fabian W.
laser annealing is a very promising technology for dopant activation [4]. Ultra-short, high intensityThermal Simulation of Laser Annealing for 3D Integration B. Rajendran, S. H. Jain1 , T. A. Kramer of various interconnect and device layers of an exemplary 3D IC structure during laser annealing for dopant
The Modellers' Apprentice -Gesture-Based 3D Design in Immersive Environments
Cooperstock, Jeremy R.
The Modellers' Apprentice - Gesture-Based 3D Design in Immersive Environments FrancÂ¸ois Rioux techniques) INTRODUCTION The Modellers' Apprentice is a fully immersive 3D computer- augmented environment in Figure 1. Figure 1. The Modellers Apprentice running in The Shared Reality En- vironment. RELATED WORK
GEOMETRIC CHARACTERIZATION AND OPTIMIZATION OF 3D ORGANIC FLEXIBLE SOLAR CELLS
Kassegne, Samuel Kinde
GEOMETRIC CHARACTERIZATION AND OPTIMIZATION OF 3D ORGANIC FLEXIBLE SOLAR CELLS Characterization and Optimization of 3D Organic Flexible Solar Cells by Ashish K. Gaikwad Master of Science of flexible organic solar cells, micro-fabricated using novel microfabrication procedures. A fully functional
3D Harmonic Mapping and Tetrahedral Meshing of Brain Imaging Data
Thompson, Paul
3D Harmonic Mapping and Tetrahedral Meshing of Brain Imaging Data Yalin Wang1 , Xianfeng Gu2 , Paul algorithm finds a harmonic map from a 3-manifold to a 3D solid sphere and the second is a novel sphere of magnetic resonance images (MRI). A heat flow method is used to solve the volumetric harmonic mapping
Optical Snow Analysis using the 3D-Xray Transform A. Averbuch2
Averbuch, Amir
-Xray transform, which is situated as a core algorithm in medical imaging when 3D reconstructions from projectionsOptical Snow Analysis using the 3D-Xray Transform N. Peled1 A. Averbuch2 Y. Keller3 Y. Shkolnisky4 estimation scenario which analyzes motions such as snowfall, tree movements, cars traffic and people walking
GaN nanowires show more 3D piezoelectricity than bulk GaN
Espinosa, Horacio D.
Logo GaN nanowires show more 3D piezoelectricity than bulk GaN admin / January 11, 2012 individual gallium nitride (GaN) nanowires showing strong piezoelectric effect in 3D. This is in spite of the fact that each nanowire only measures 100nm in diameter. While GaN is ubiquitous in optoelectronic
Automation for Cryo-TEM: From Specimen Grid to 3D
Automation for Cryo-TEM: From Specimen Grid to 3D Map B. Carragher, D. Fellmann, N. Kisseberth, R://www.itg.uiuc.edu #12;AUTOMATION FOR CRYO-TEM: FROM SPECIMEN GRID TO 3D MAP B. Carragher, D. Fellmann, N. Kisseberth, R map of a macromolecular structure automatically and within hours of inserting a specimen
Outdoor 3D Acquisition System for Small and Fast Targets. Application to honeybee monitoring at the
Boyer, Edmond
Outdoor 3D Acquisition System for Small and Fast Targets. Application to honeybee monitoring-based system for monitoring honeybees in 3D at the beehive entrance. In this context, this article highlights or health conditions. 1 Introduction The honeybee is a bio-indicator species, and nowadays researchers use
Creative Character Design Based on Combination of 2D and 3D Characteristics
Salimi Beni, Anahita
2014-12-09T23:59:59.000Z
This research combines the need for innovation in character design with the idea of combining 2D and 3D characteristics to create an original and appealing character style. The goal has been to benefit from the capabilities of 3D animation while...
Automatic 3D Registration of Lung Surfaces in Computed Tomography Scans
Automatic 3D Registration of Lung Surfaces in Computed Tomography Scans Margrit Betke, PhD1 scheme until the registration performance is sufficient. We applied our method to register the 3D lung computed tomography (CT) has become a well-established means of diag- nosing primary lung cancer
Sola, M.; Haakon Nordby, L.; Dailey, D.V.; Duncan, E.A. [BP and Statoil Alliance, Stavanger (Norway)
1996-12-31T23:59:59.000Z
High resolution 3-D visualization of horizon interpretation and seismic attributes from large 3-D seismic surveys in deepwater Nigeria has greatly enhanced the exploration team`s ability to quickly recognize prospective segments of subregional and prospect specific scale areas. Integrated workstation generated structure, isopach and extracted horizon consistent, interval and windowed attributes are particularly useful in illustrating the complex structural and stratigraphical prospectivity of deepwater Nigeria. Large 3-D seismic volumes acquired over 750 square kilometers can be manipulated within the visualization system with attribute tracking capability that allows for real time data interrogation and interpretation. As in classical seismic stratigraphic studies, pattern recognition is fundamental to effective depositions facies interpretation and reservoir model construction. The 3-D perspective enhances the data interpretation through clear representation of relative scale, spatial distribution and magnitude of attributes. In deepwater Nigeria, many prospective traps rely on an interplay between syndepositional structure and slope turbidite depositional systems. Reservoir systems in many prospects appear to be dominated by unconfined to moderately focused slope feeder channel facies. These units have spatially complex facies architecture with feeder channel axes separated by extensive interchannel areas. Structural culminations generally have a history of initial compressional folding with late in extensional collapse and accommodation faulting. The resulting complex trap configurations often have stacked reservoirs over intervals as thick as 1500 meters. Exploration, appraisal and development scenarios in these settings can be optimized by taking full advantage of integrating high resolution 3-D visualization and seismic workstation interpretation.
Sola, M.; Haakon Nordby, L.; Dailey, D.V.; Duncan, E.A. (BP and Statoil Alliance, Stavanger (Norway))
1996-01-01T23:59:59.000Z
High resolution 3-D visualization of horizon interpretation and seismic attributes from large 3-D seismic surveys in deepwater Nigeria has greatly enhanced the exploration team's ability to quickly recognize prospective segments of subregional and prospect specific scale areas. Integrated workstation generated structure, isopach and extracted horizon consistent, interval and windowed attributes are particularly useful in illustrating the complex structural and stratigraphical prospectivity of deepwater Nigeria. Large 3-D seismic volumes acquired over 750 square kilometers can be manipulated within the visualization system with attribute tracking capability that allows for real time data interrogation and interpretation. As in classical seismic stratigraphic studies, pattern recognition is fundamental to effective depositions facies interpretation and reservoir model construction. The 3-D perspective enhances the data interpretation through clear representation of relative scale, spatial distribution and magnitude of attributes. In deepwater Nigeria, many prospective traps rely on an interplay between syndepositional structure and slope turbidite depositional systems. Reservoir systems in many prospects appear to be dominated by unconfined to moderately focused slope feeder channel facies. These units have spatially complex facies architecture with feeder channel axes separated by extensive interchannel areas. Structural culminations generally have a history of initial compressional folding with late in extensional collapse and accommodation faulting. The resulting complex trap configurations often have stacked reservoirs over intervals as thick as 1500 meters. Exploration, appraisal and development scenarios in these settings can be optimized by taking full advantage of integrating high resolution 3-D visualization and seismic workstation interpretation.
Dec 7, 2013 ... As soon as the brakes of a railroad car in West Lafayette are released, the car will roll down under the force of gravity. It will accelerate, then ...
3-Phase Recognition Approach to Pseudo 3D Building Generation from 2D Floor Plan
Moloo, Raj Kishen; Auleear, Abu Salmaan
2011-01-01T23:59:59.000Z
Nowadays three dimension (3D) architectural visualisation has become a powerful tool in the conceptualisation, design and presentation of architectural products in the construction industry, providing realistic interaction and walkthrough on engineering products. Traditional ways of implementing 3D models involves the use of specialised 3D authoring tools along with skilled 3D designers with blueprints of the model and this is a slow and laborious process. The aim of this paper is to automate this process by simply analyzing the blueprint document and generating the 3D scene automatically. For this purpose we have devised a 3-Phase recognition approach to pseudo 3D building generation from 2D floor plan and developed a software accordingly. Our 3-phased 3D building system has been implemented using C, C++ and OpenCV library [24] for the Image Processing module; The Save Module generated an XML file for storing the processed floor plan objects attributes; while the Irrlitch [14] game engine was used to impleme...
Madura, Thomas I; Gull, Theodore R; Kruip, Chael J H; Paardekooper, Jan-Pieter
2015-01-01T23:59:59.000Z
We present the first 3D prints of output from a supercomputer simulation of a complex astrophysical system, the colliding stellar winds in the massive (>120 M_Sun), highly eccentric (e ~ 0.9) binary star system Eta Carinae. We demonstrate the methodology used to incorporate 3D interactive figures into a PDF journal publication and the benefits of using 3D visualization and 3D printing as tools to analyze data from multidimensional numerical simulations. Using a consumer-grade 3D printer (MakerBot Replicator 2X), we successfully printed 3D smoothed particle hydrodynamics (SPH) simulations of Eta Carinae's inner (r ~ 110 au) wind-wind collision interface at multiple orbital phases. The 3D prints and visualizations reveal important, previously unknown 'finger-like' structures at orbital phases shortly after periastron (phi ~ 1.045) that protrude radially outward from the spiral wind-wind collision region. We speculate that these fingers are related to instabilities (e.g. thin-shell, Rayleigh-Taylor) that arise a...
Parameterization and Analysis of 3-D Solar Radiative Transfer in Clouds: Final Report
Jerry Y. Harrington
2012-09-21T23:59:59.000Z
This document reports on the research that we have done over the course of our two-year project. The report also covers the research done on this project during a 1 year no-cost extension of the grant. Our work has had two main, inter-related thrusts: The first thrust was to characterize the response of stratocumulus cloud structure and dynamics to systematic changes in cloud infrared radiative cooling and solar heating using one-dimensional radiative transfer models. The second was to couple a three-dimensional (3-D) solar radiative transfer model to the Large Eddy Simulation (LES) model that we use to simulate stratocumulus. The purpose of the studies with 3-D radiative transfer was to examine the possible influences of 3-D photon transport on the structure, evolution, and radiative properties of stratocumulus. While 3-D radiative transport has been examined in static cloud environments, few studies have attempted to examine whether the 3-D nature of radiative absorption and emission influence the structure and evolution of stratocumulus. We undertook this dual approach because only a small number of LES simulations with the 3-D radiative transfer model are possible due to the high computational costs. Consequently, LES simulations with a 1-D radiative transfer solver were used in order to examine the portions of stratocumulus parameter space that may be most sensitive to perturbations in the radiative fields. The goal was then to explore these sensitive regions with LES using full 3-D radiative transfer. Our overall goal was to discover whether 3-D radiative processes alter cloud structure and evolution, and whether this may have any indirect implications for cloud radiative properties. In addition, we collaborated with Dr. Tamas Varni, providing model output fields for his attempt at parameterizing 3-D radiative effects for cloud models.
of an Industrial Robot by Processing of 3D Range Imaging Data Measured by the SwissRanger®SR-3000 Diploma Thesis TU (Switzerland) Industrial robots are commonly used in manufacturing industry, especially in automobile industry environments. The weight and high speeds of industrial robots, and resulting high tuning moments cause harmful
Small divisor problem in the theory of three-dimensional water gravity waves
Iooss, GĂ©rard
Small divisor problem in the theory of three-dimensional water gravity waves GÂ´erard Iooss , Pavel of Sciences, Lavryentyev pr. 15, Novosibirsk 630090, Russia gerard.iooss@inln.cnrs.fr, plotnikov@hydro of small divisors, the main difficulty is the inversion of the linearized operator at a non trivial point
A validation test for Adagio through replication of Big Hill and Bayou Choctaw JAS3D models.
Park, Byoung Yoon
2013-06-01T23:59:59.000Z
JAS3D, a three dimensional iterative solid mechanics code, has been used for structural analyses for the Strategic Petroleum Reserve system since the 1990s. JAS3D is no longer supported by Sandia National Laboratories, and has been replaced by Adagio. To validate the transition from JAS3D to Adagio, the existing JAS3D input decks and user subroutines for Bayou Choctaw and Big Hill models were converted for use with Adagio. The calculation results from the Adagio runs are compared to the JAS3D. Since the Adagio results are very similar to the JAS3D results, Adagio is judged to be performing satisfactorily.
Design of electronics for a high-resolution, multi-material, and modular 3D printer
Kwan, Joyce G
2013-01-01T23:59:59.000Z
Electronics for a high-resolution, multi-material, and modular 3D printer were designed and implemented. The driver for a piezoelectric inkjet print head can fire its nozzles with one of three droplet sizes ranging from 6 ...
Andrew Schwartz: Brain Control for Artificial Limbs -Businessweek How About Them Gams: 3D
Schwartz, Andrew
Andrew Schwartz: Brain Control for Artificial Limbs - Businessweek Related How About Them Gams: 3D Printing Custom Legs When Jan Scheuermann grasped a chocolate bar and raised it to her mouth last year