SUBSHIFTS AND PERFORATION JULIEN GIOL AND DAVID KERR
Kerr, David
SUBSHIFTS AND PERFORATION JULIEN GIOL AND DAVID KERR Abstract. We demonstrate that the perforative work [29] showed that the perforation that can be observed in the ordered K0 group of certain manifolds. As a consequence of the perforation in K0, Villadsen's C-algebra fails to Date: September 8, 2008. 2000 Mathematics
Right-Sided Sigmoid Diverticular Perforation
Little, Andrew; Culver, Andrew
2012-01-01
Sigmoid Diverticular Perforation Andrew Little, MS Andyobstruction, bleeding, perforation, and colonic abscess.less common complication is perforation with formation of an
Direct numerical simulation of turbulent heat transfer in annuli: effect of heat flux ratio.
Paris-Sud XI, Université de
Direct numerical simulation of turbulent heat transfer in annuli: effect of heat flux ratio. M-la-Vall´ee cedex 2, France (Dated: October 23, 2008) Abstract Fully developed turbulent flow and heat transfer square (rms) of temperature fluctuations, turbulent heat fluxes, heat transfer, ...). To validate
Blunt Trauma Patient with Esophageal Perforation
Colak Oray, Nese; Sivrikaya, Semra; Bayram, Basak; Egeli, Tufan; Dicle, Oguz
2014-01-01
JA, Viste A. Esophageal perforation: diagnostic work-up andPatient with Esophageal Perforation clinical decision-makingBMJ. 2013;346:f3095. perforation in South of Sweden: results
ORALLOY (93.15 235U) METAL ANNULI WITH BERYLLIUM CORE
John D. Bess; Leland M. Montierth; Raymond L. Reed; John T. Mihalczo
2010-09-01
A variety of critical experiments were constructed of enriched uranium metal during the 1960s and 1970s at the Oak Ridge Critical Experiments Facility (ORCEF) in support of criticality safety operations at the Y-12 Plant. The purposes of these experiments included the evaluation of storage, casting, and handling limits for the Y-12 Plant and providing data for verification of calculation methods and cross-sections for nuclear criticality safety applications. These included solid cylinders of various diameters, annuli of various inner and outer diameters, two and three interacting cylinders of various diameters, and graphite and polyethylene reflected cylinders and annuli. Of the hundreds of delayed critical experiments, two were performed that consisted of uranium metal annuli with a solid beryllium metal core. The outer diameter of the annuli was approximately 13 or 15 inches with an inner diameter of 7 inches. The diameter of the core was approximately 7 inches. The critical height of the configurations was approximately 5 and 4 inches, respectively. The uranium annuli consisted of multiple stacked rings with diametral thicknesses of approximately 2 inches apiece and varying heights. The 15-inch experiment was performed on June 4, 1963, and the 13-inch experiment on July 12, 1963 by J. T. Mihalczo and R. G. Taylor (Ref. 1) with accompanying logbook. Both detailed and simplified model specifications are provided in this evaluation. Both of these fast-spectra experiments were determined to represent acceptable benchmarks. The calculated eigenvalues for both the detailed and simple models are within approximately 0.6% of the benchmark values, but significantly greater than 3s from the benchmark value because the uncertainty in the benchmark is very small: <±0.0004 (1s). There is significant variability between results using different neutron cross section libraries, the greatest being a ?keff of ~0.67%. Unreflected and unmoderated experiments with the same highly enriched uranium metal parts were performed at the Oak Ridge Critical Experiments Facility in the 1960s and are evaluated in HEU MET FAST 051. Thin graphite reflected (2 inches or less) experiments also using the same highly enriched uranium metal parts are evaluated in HEU MET FAST 071. Polyethylene-reflected configurations are evaluated in HEU-MET-FAST-076. A stack of highly enriched metal discs with a thick beryllium reflector is evaluated in HEU-MET-FAST-069.
Perforation of Inferior Vena Cava by Inferior Vena Cava Filter
Unterman, Sarah; Nair, Tad
2013-01-01
vena cava filter strut perforation discovered during rightin E mergency M edicine Perforation of Inferior Vena Cava bysuggestive of chronic perforation with no evidence of free
Handlebar Trauma Causing Small Bowel Hernia with Jejunal Perforation
Yaylac?, Serpil; Ercelik, Hasan; Seyit, Murat; Kocyigit, Ali; Serinken, Mustafa
2014-01-01
most common site of perforation, and peritoneal irritationhernia with bowel perforation presenting as a tensionBowel Hernia with Jejunal Perforation Serpil Yaylaci, MD*
EFFECTIVE MACROSCOPIC DYNAMICS OF STOCHASTIC PARTIAL DIFFERENTIAL EQUATIONS IN PERFORATED
Duan, Jinqiao
EFFECTIVE MACROSCOPIC DYNAMICS OF STOCHASTIC PARTIAL DIFFERENTIAL EQUATIONS IN PERFORATED DOMAINS equation defined on a domain perforated with small holes or heterogeneities. The homogenized effective, effective macroscopic model, stochastic homogenization, white noise, probability distribution, perforated
Nasal septum perforation as the presenting sign of lupus erythematosus
Mascarenhas, R; Tellechea, O; Oliveira, H; Reis, JP; Cordeiro, M; Migueis, J
2005-01-01
A.R. Asymptomatic nasal septum perforation in Systemic LupusVachtenheim J, Grossmann J. Perforation of the nasal septum98. 6. Simpson J. Nasal-septum perforation in Systemic Lupus
High power laser perforating tools and systems
Zediker, Mark S; Rinzler, Charles C; Faircloth, Brian O; Koblick, Yeshaya; Moxley, Joel F
2014-04-22
ystems devices and methods for the transmission of 1 kW or more of laser energy deep into the earth and for the suppression of associated nonlinear phenomena. Systems, devices and methods for the laser perforation of a borehole in the earth. These systems can deliver high power laser energy down a deep borehole, while maintaining the high power to perforate such boreholes.
A case of perforating necrobiosis lipoidica in an African American female
Abdulla, Farah R; Sheth, Pranav B
2008-01-01
lipoidica that have perforation as a characteristic change.report, all subsequent cases show perforation histologically
HARMONIC MORPHISMS BETWEEN RIEMANNIAN MANIFOLDS
Gudmundsson, Sigmundur
HARMONIC MORPHISMS BETWEEN RIEMANNIAN MANIFOLDS SIGMUNDUR GUDMUNDSSON AND MARTIN SVENSSON theory of harmonic morphisms between Riemannian manifolds. This research field has developed rapidly geometry a harmonic morphism is a map : (M, g) (N, h) between Riemannian manifolds with the property
Hildebrand, Richard J. (Edgemere, MD); Wozniak, John J. (Columbia, MD)
2001-01-01
A compressed gas storage cell interconnecting manifold including a thermally activated pressure relief device, a manual safety shut-off valve, and a port for connecting the compressed gas storage cells to a motor vehicle power source and to a refueling adapter. The manifold is mechanically and pneumatically connected to a compressed gas storage cell by a bolt including a gas passage therein.
Evaluation of Perforated Carbonate Cores Under Acid Stimulation
Diaz, Nerwing Jose
2011-10-21
charge ........................................................................ 5 Fig. 2?Perforating gun and detonation sequence (Economides et al. 1994) ........... 6 Fig. 3?Sources of pressure drop in a perforated system (Bell et al.... 1995) ............. 7 Fig. 4?Mechanical knife perforator (Bell et al. 1995) ............................................. 9 Fig. 5?Bullet gun perforating (Allen and Worzel. 1956) ........................................ 10...
Author's personal copy Perforated diode neutron detector modules fabricated from
Shultis, J. Kenneth
Author's personal copy Perforated diode neutron detector modules fabricated from high Perforated detectors Perforated diodes a b s t r a c t Compact neutron detectors are being designed that are mass produced from high-purity Si wafers. Each detector has thousands of circular perforations etched
Body Force Model for the Aerodynamics of Inclined Perforated Surfaces
Liu, Feng
Body Force Model for the Aerodynamics of Inclined Perforated Surfaces Juntao Xiong, Andrew Johnson of perforated surfaces inclined to a freestream. The goal is to characterize the key parameters affecting perforations. The model simulates the effects of the perforated surfaces by locally applying a body force term
Sound radiation from a line forced perforated elastic sandwich panel
Sidorov, Nikita
Sound radiation from a line forced perforated elastic sandwich panel I. David Abrahams Department by altering the interior geometry, and perforations can be added to one or both sides. With perforations399 1990 devised an effective boundary condition for a perforated sandwich plate structure, valid
Frobenius manifolds and algebraic integrability
L. K. Hoevenaars
2007-06-26
We give a short review of Frobenius manifolds and algebraic integrability and study their intersection. The simplest case is the relation between the Frobenius manifold of simple singularities, which is almost dual to the integrable open Toda chain. New types of manifolds called extra special Kaehler and special F-manifolds are introduced which capture the intersection.
Ungulate Carcasses Perforate Ecological Filters and Create
2007). Forest biodiversity, energy flow, nutrient cycling, and regeneration are significantly affectedUngulate Carcasses Perforate Ecological Filters and Create Biogeochemical Hotspots in Forest. Vucetich, Rolf O. Peterson, Joshua M. Shields, and Matthew D. Powers School of Forest Resources
Manifold Integration: Data Integration on Multiple Manifolds
Choi, Hee Youl
2011-08-08
. Hammond, 2008, Association for the Advanced of Artiflcial Intelligence (AAAI-08), Copyright 2008 by AAAI. c 2005 IEEE. Partially reprinted, with permission, from IEEE Int. Conf. on Devel- opment and Learning \\Kernel Isomap on Noisy Manifold" H. Choi... and S. Choi. For more information go to http://thesis.tamu.edu/forms/IEEE permission note.pdf. c 2010 IEEE. Partially reprinted, with permission, from IEEE Int. Conf. Acoustics, Speech and Signal Processing \\Learning Alpha-Integration with Partially...
Case of Urethral Foreign Body: IUD Perforation of the Bladder with Calculus Formation
Gillis, Erin; Chhiv, Nak; Kang, Sacha; Sayegh, Rocky; Lotfipour, Shahram
2006-01-01
N, Djahanbakhch O. Perforation of the uterus and colon byand partial uterine perforation and embedding followingW.Z. , Kutcher, R. ,: Uterine perforation and embedding by
The “Perforated City:” Leipzig’s Model of Urban Shrinkage Management
Florentin, Daniel
2010-01-01
adapt to shrinkage and perforation at an early stage in an2010 From Shrinkage to Perforation But the phenomenon tookand created a kind of “perforation” (Nuissl & Rink, 2004).
Incarcerated Diaphragmatic Hernia with Bowel Perforation Presenting as a Tension Pneumothorax
Offman, Ryan; Spencer, Ryan
2014-01-01
secondary to a colonic perforation during diagnosticHernia with Bowel Perforation Presenting as a Tensionempyema secondary to perforation of an incarcerated segment
Djordjevic, A.
1983-12-27
A tool guide is described that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into the cross pipe for cleaning, inspection, etc. 3 figs.
Djordjevic, A.
1982-07-08
A tool guide that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into to cross pipe for cleaning, inspection, etc.
Djordjevic, Aleksandar (Thousand Oaks, CA)
1983-12-27
A tool guide that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into to cross pipe for cleaning, inspection, etc.
Dual manifold heat pipe evaporator
Adkins, Douglas R. (Albuquerque, NM); Rawlinson, K. Scott (Albuquerque, NM)
1994-01-01
An improved evaporator section for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes.
Dual manifold heat pipe evaporator
Adkins, D.R.; Rawlinson, K.S.
1994-01-04
An improved evaporator section is described for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes. 1 figure.
Parameter Estimation for the Heat Equation on Perforated Domains
Parameter Estimation for the Heat Equation on Perforated Domains H.T. Banks1 , D. Cioranescu2 , A: Inverse problems, parameter estimation, perforated domains, homogeniza- tion, thermal diffusion, ordinary porous samples by use of solutions of a heat equation on a randomly perforated domain. As noted
Managing Performance vs. Accuracy Trade-offs With Loop Perforation
Polz, Martin
Managing Performance vs. Accuracy Trade-offs With Loop Perforation Stelios Sidiroglou Sasa-hoc, domain-specific techniques developed specifically for the computation at hand. Loop perforation provides of their iterations. A criticality testing phase filters out critical loops (whose perforation produces unacceptable
Acoustic Transmission Loss of Perforated Plates Vincent Phong1
Papamoschou, Dimitri
Acoustic Transmission Loss of Perforated Plates Vincent Phong1 and Dimitri Papamoschou2 University of California, Irvine, CA 92697, USA A study has been conducted on the acoustic response of perforated plates coefficient of the perforate. The theoretical analysis is based on planar wave propagation through a single
Parameter Estimation for the Heat Equation on Perforated Domains
Parameter Estimation for the Heat Equation on Perforated Domains H.T. Banks1 , D. Cioranescu2 , A for simulated data for heat flow in a porous medium. We consider data simulated from a model on a perforated Words: Inverse problems, parameter estimation, perforated domains, homogeniza- tion, thermal diffusion
Nambu-Goldstone explosion under brane perforation
D. V. Gal'tsov; E. Yu. Melkumova; S. Zamani-Mogaddam
2010-12-13
We show that perforation of the three-brane by mass impinging upon it from the five-dimensional bulk excites Nambu-Goldstone spherical wave propagating outwards with the velocity of light. It is speculated that such an effect can give rise to "`unmotivated" energy release events in the brane-world cosmological models.
Nambu-Goldstone explosion under brane perforation
Gal'tsov, D V; Zamani-Mogaddam, S
2010-01-01
We show that perforation of the three-brane by mass impinging upon it from the five-dimensional bulk excites Nambu-Goldstone spherical wave propagating outwards with the velocity of light. It is speculated that such an effect can give rise to "`unmotivated" energy release events in the brane-world cosmological models.
Partially integrated exhaust manifold
Hayman, Alan W; Baker, Rodney E
2015-01-20
A partially integrated manifold assembly is disclosed which improves performance, reduces cost and provides efficient packaging of engine components. The partially integrated manifold assembly includes a first leg extending from a first port and terminating at a mounting flange for an exhaust gas control valve. Multiple additional legs (depending on the total number of cylinders) are integrally formed with the cylinder head assembly and extend from the ports of the associated cylinder and terminate at an exit port flange. These additional legs are longer than the first leg such that the exit port flange is spaced apart from the mounting flange. This configuration provides increased packaging space adjacent the first leg for any valving that may be required to control the direction and destination of exhaust flow in recirculation to an EGR valve or downstream to a catalytic converter.
Perforation of domain wall by point mass
D. V. Gal'tsov; E. Yu. Melkumova; P. A. Spirin
2013-12-30
We investigate collision of a point particle and an infinitely thin planar domain wall interacting gravitationally within the linearized gravity in Minkowski space-time of arbitrary dimension. In this setting we are able to describe analytically the perforation of the wall by an impinging particle, showing that it is accompanied by excitation of the spherical shock branon wave propagating outwards with the speed of light. Formally, the shock wave is a free solution of the branon wave equation which has to be added to ensure the validity of the retarded solution at the perforation point. Physically, the domain wall gets excited due to the shake caused by an instantaneous change of sign of the repulsive gravitational force. This effect is shown to hold, in particular, in four space-time dimensions, being applicable to the problem of cosmological domain walls.
Perforation of domain wall by point mass
Gal'tsov, D V; Spirin, P A
2013-01-01
We investigate collision of a point particle and an infinitely thin planar domain wall interacting gravitationally within the linearized gravity in Minkowski space-time of arbitrary dimension. In this setting we are able to describe analytically the perforation of the wall by an impinging particle, showing that it is accompanied by excitation of the spherical shock branon wave propagating outwards with the speed of light. Formally, the shock wave is a free solution of the branon wave equation which has to be added to ensure the validity of the retarded solution at the perforation point. Physically, the domain wall gets excited due to the shake caused by an instantaneous change of sign of the repulsive gravitational force. This effect is shown to hold, in particular, in four space-time dimensions, being applicable to the problem of cosmological domain walls.
EQUALITY CONSTRAINTS, RIEMANNIAN MANIFOLDS AND ...
2007-07-27
Jul 27, 2007 ... Key words: Direct search methods, Riemannian manifolds, equality ...... enter into a small enough neighborhood Ux? ? N of x? at the point y ...
Perforation of thin unreinforced concrete slabs
Cargile, J.D.; Giltrud, M.E.; Luk, V.K.
1993-10-01
This report discusses fourteen tests which were conducted to investigate the perforation of thin unreinforced concrete slabs. The 4340-steel projectile used in the test series is 50.8 mm in diameter, 355.6 mm in length, has a mass of 2.34 kg. and an ogive nose with caliber radius head of 3. The slabs, contained within steel culverts, are 1.52 m in diameter and consist of concrete with a nominal unconfined compressive strength of 38.2 MPa and maxima aggregate size of 9.5 mm. Slab thicknesses are 284.4, 254.0, 215.9 and 127.0 mm. Tests were conducted at impact velocities of about 313 m/s on all slab thicknesses and about 379 and 471 m/s on the 254.0-mm-thick slab. All tests were conducted at normal incidence to the slab. All tests were conducted at normal incidence to the slab. Information obtained from the tests used to determine the loading (deceleration) on the projectile during the perforation process, the velocity-displacement of the projectile as it perforated the slab, and the projectile position as damage occurred on the backface of the slab. The test projectile behaved essentially as a rigid body for all of the tests.
Miniter, Una; Bae-Harboe, Yoon-Soo Cindy; Powers, Jennifer G; Campbell, Shannon M; Goldberg, Lynne J
2012-01-01
adult related to bowel perforation: Report and review of thewho expired from bowel perforation. CONCLUSIONS: Severeischemia and foci of perforation of the jejunum and ileum, a
Special Holonomy Manifolds in Physics
Luis J. Boya
2006-12-01
This is a pedagogical exposition of holonomy groups intended for physicists. After some pertinent definitions, we focus on special holonomy manifolds, two per division algebras, and comment upon several cases of interest in physics, associated with compactification from F-, M- and string theory, on manifolds of 8, 7 and 6 dimensions respectively.
Pressure enhanced penetration with shaped charge perforators
Glenn, Lewis A. (Danville, CA)
2001-01-01
A downhole tool, adapted to retain a shaped charge surrounded by a superatmospherically pressurized light gas, is employed in a method for perforating a casing and penetrating reservoir rock around a wellbore. Penetration of a shaped charge jet can be enhanced by at least 40% by imploding a liner in the high pressure, light gas atmosphere. The gas pressure helps confine the jet on the axis of penetration in the latter stages of formation. The light gas, such as helium or hydrogen, is employed to keep the gas density low enough so as not to inhibit liner collapse.
Rinard, Martin
Probabilistic Accuracy Bounds for Perforated Programs A New Foundation for Program Analysis, Accuracy, Verification, Program Analysis, Program Transformation Keywords Loop Perforation, Program an inherent perfor- mance versus accuracy trade-off -- the more computational re- sources (such as time
Shelling in low dimensional manifolds
Murray, William Owen
1974-01-01
SHELLING IN LOW DIMENSIONAL MANIFOLDS A Thesis by WILLIAM OWEN MURRAY IV Approved as to style and content by: (Chairman of Committee) c (Head of /g" 7 Department) (Member) (Memge May 1974 ABSTRACT Shelling in Low Dimensional Manifolds. (May... f*d~ f b. g of M is a finite collection of closed n-cells Cl, C2, n that S = U C and C and C have disjoint interiors for i i=1 C such n Now let M be an n-manifold with boundary. If h is an n-cell in The citations on the following pages follow...
Stress computations on perforated polygonal domains Jonas Englund and Johan Helsing
Helsing, Johan
Stress computations on perforated polygonal domains Jonas Englund and Johan Helsing Numerical perforated with 1170 holes are presented. The general usefulness of integral equation methods is discussed
Modeling of Microwave Ovens with Perforated Metal Walls Erin M. Kiley and Vadim V. Yakovlev
Yakovlev, Vadim
Modeling of Microwave Ovens with Perforated Metal Walls Erin M. Kiley and Vadim V. Yakovlev ovens with perforated regions of metal walls. The technique relies on replacement of perforated segments-parameters obtained by FDTD simulation of a perforated sheet in a waveguide. This approach is employed in FDTD
Finite-Element Investigation and Design Recommendations for Perforated Steel Plate Shear Walls
Bruneau, Michel
Finite-Element Investigation and Design Recommendations for Perforated Steel Plate Shear Walls.k.a. perforated SPSW . Finite element monotonic pushover analyses were conducted, first on a series of individual perforated strips with variation in perforation diameter, to develop a fundamental understanding
Strongly Perforated K0-Groups of Simple C ?-Algebras
K-theory (4) 15(1998), 307–322. [V]. Jesper Villadsen, Simple C*-algebras with perforation. J. Funct. Anal. (1) 154(1998), 110–116. Toftegaards Alle 26. 4 tv.
Manifold seal structure for fuel cell stack
Collins, William P. (South Windsor, CT)
1988-01-01
The seal between the sides of a fuel cell stack and the gas manifolds is improved by adding a mechanical interlock between the adhesive sealing strip and the abutting surface of the manifolds. The adhesive is a material which can flow to some extent when under compression, and the mechanical interlock is formed providing small openings in the portion of the manifold which abuts the adhesive strip. When the manifolds are pressed against the adhesive strips, the latter will flow into and through the manifold openings to form buttons or ribs which mechanically interlock with the manifolds. These buttons or ribs increase the bond between the manifolds and adhesive, which previously relied solely on the adhesive nature of the adhesive.
Characterization of cardiac lead perforation risk via a dynamic simulated environment
Rosario, Matthew J
2012-01-01
Delayed cardiac perforation is a serious medical condition where an implanted cardiac lead migrates through the heart wall, causing life-threatening complications. Where acute perforation occurs during implant, delayed ...
NEW RESULTS ON THE ASYMPTOTIC BEHAVIOUR OF DIRICHLET PROBLEMS IN PERFORATED DOMAINS
Garroni, Adriana
NEW RESULTS ON THE ASYMPTOTIC BEHAVIOUR OF DIRICHLET PROBLEMS IN PERFORATED DOMAINS GIANNI DAL MASO behaviour of the solutions of elliptic equations with Dirichlet boundary conditions in perforated domains
Design and performance considerations for perforated semiconductor thermal-neutron detectors
Shultis, J. Kenneth
Design and performance considerations for perforated semiconductor thermal-neutron detectors J neutron detectors Solid state neutron detectors a b s t r a c t Perforated silicon structures backfilled. Although many perforated structures are possible, there are three fundamental designs that are studied
Perforated Layer Structures in Liquid Crystalline Rod-Coil Block Copolymers
Wan, Xin-hua
Perforated Layer Structures in Liquid Crystalline Rod-Coil Block Copolymers Kishore K. Tenneti of the tetragonal perforated layer structures in a series of rod- coil liquid crystalline block copolymers (BCPs microscopy (TEM) techniques were used to investigate these rod-coil molecules, and a perforated layer
Acoustic modeling of perforated plates with bias flow for Large-Eddy Simulations
Mendez, Simon
Acoustic modeling of perforated plates with bias flow for Large-Eddy Simulations S. Mendez a,, J. D of California, Los Angeles, Los Angeles, CA 90095, USA. Abstract The study of the acoustic effect of perforated to provide data on the flow around a perforated plate and the associated acoustic damping is demonstrated
Simulating Perforation of Thin Plates Using Molecular Dynamics Approach Anton M. Krivtsov
Krivtsov, Anton M.
1 Simulating Perforation of Thin Plates Using Molecular Dynamics Approach Anton M. Krivtsov or molecules, but as elements of the mesoscale level, such as material grains [4,5]. Fig.1: Oblique perforation of plate by ogive-nose projectile. This approach is used in the current work to simulate perforation
Large-Eddy Simulation of the Acoustic Response of a Perforated Plate
Nicoud, Franck
Large-Eddy Simulation of the Acoustic Response of a Perforated Plate Jean Dass´e and Simon Mendez response of a multi-perforated plate submitted to normal acoustic excitation with Large-Eddy Simulation (LES). It consists in simulating an infinite perforated plate, the periodicity of the geometry allowing
Strelniker, Yakov M.
Transmittance and transparency of subwavelength-perforated conducting films in the presence theoretically and numerically studied the transmission of light through a subwavelength-perforated metal film of a static magnetic field. Both the perforated and the homogeneous metal films are found to exhibit
Bruneau, Michel
Special Perforated Steel Plate Shear Walls with Reduced Beam Section Anchor Beams. I: Experimental presents results of an experimental investigation of specially detailed ductile perforated steel plate history of increasing displacements to a minimum drift of 3%. The perforated panel reduced the elastic
Numerical Investigation of the Acoustic Behavior of a Multi-perforated Liner
Eldredge, Jeff
Numerical Investigation of the Acoustic Behavior of a Multi-perforated Liner Jeff D. Eldredge, Stanford, CA, 94305, USA The acoustic response of a turbulent flow through an aperture in a multi-perforated, turbine, and the downstream-traveling sound created by the fan. In particular, multi-perforated liners
J. SPACECRAFT, VOL. 36, NO. 2: ENGINEERING NOTES 293 Fig. 2 Perforation into oblique plate.
Riabov, Vladimir V.
J. SPACECRAFT, VOL. 36, NO. 2: ENGINEERING NOTES 293 Fig. 2 Perforation into oblique plate. Oblique of perforation due to yaw alone into the oblique plate can be represented by Eq. (3), with P0 given by Eq. (1 of perforation vs range for combined pitching and yawing motion. With the plane of angular motion oriented 45 deg
Papamoschou, Dimitri
of Perforated Plates with Bias Flow Vincent Phong1 and Dimitri Papamoschou2 University of California, Irvine, CA perforated plates with bias flow. A theoretical model is proposed which characterizes the acoustic response downstream of the perforations. Experimental measurements of insertion loss are conducted in a specially
Large-Eddy Simulation of a Turbulent Flow around a Multi-Perforated Plate
Mendez, Simon
Large-Eddy Simulation of a Turbulent Flow around a Multi-Perforated Plate Simon Mendez1 , Franck and used in Reynolds-Averaged Navier-Stokes methods cannot predict momen- tum/heat transfer on perforated plate are reported. Large-Eddy Simulations of the flow created by an infinite multi-perforated plate
Two-parameter homogenization for a GL problem in a perforated domain
Berlyand, Leonid
Two-parameter homogenization for a GL problem in a perforated domain Leonid Berlyand(1) , Petru the notations: o = o, i = i so that A = o i. We next define a perforated domain A obtained by "punching" holes, a point x R2 and define Z = {m + x + P A}. Then the perforated domain is defined as follows: A = A \\ m
High frequency acoustic transmission loss of perforated plates at normal incidence
Papamoschou, Dimitri
High frequency acoustic transmission loss of perforated plates at normal incidence Vincent Phonga conducted on the transmission loss of perforated plates at normal incidence. The investigation includes microphone measurements of transmission loss for 11 perforated plates with variable thickness, hole size
Special Perforated Steel Plate Shear Walls with Reduced Beam Section Anchor Beams. II: Analysis and
Bruneau, Michel
Special Perforated Steel Plate Shear Walls with Reduced Beam Section Anchor Beams. II: Analysis detailed ductile perforated steel plate shear walls SPSWs . These SPSWs had low yield strength steel infill, recommendations for the design of these special detailed perforated SPSWs are presented. DOI: 10.1061/ ASCE 0733
FINITE ELEMENT INVESTIGATION AND DESIGN RECOMMENDATIONS FOR PERFORATED STEEL PLATE SHEAR WALLS
Bruneau, Michel
FINITE ELEMENT INVESTIGATION AND DESIGN RECOMMENDATIONS FOR PERFORATED STEEL PLATE SHEAR WALLS of the behavior of unstiffened thin SPSW having a regular pattern of openings (a.k.a. perforated SPSW). Finite element monotonic pushover analyses were conducted, first on a series of individual perforated strips
INVERSE PROBLEMS FOR EINSTEIN MANIFOLDS 1. Introduction ...
2008-12-11
principle is that Einstein's equation becomes a non-linear elliptic system with real ...... manifolds with boundary, Communications in Analysis and Geometry 11 ...
Tubing pressurized firing apparatus for a tubing conveyed perforating gun
Davies, D. L.
1985-11-26
A tubing pressurized firing apparatus is shown for use with a tubing conveyed perforating gun of the type used to perforate a cased well bore. The firing apparatus has a tubular body with an upper end for connection in the well tubing string and with a lower end for connection to a well perforating gun. An inner mandrel is slidably mounted within the tubular body and has a ball seat formed in the interior bore thereof for receiving a ball dropped through the well tubing string. The ball and ball seat together form a pressure tight seal whereby tubing pressure in the well tubing string acts on the inner mandrel to slide the mandrel downwardly within the tubular body. A cocking mechanism located below the inner mandrel within the body includes a lockout member which is initially positioned between a detonating pin and a percussion detonator. The cocking mechanism is actuated by downward sliding movement of the inner mandrel to move the lockout member from between the detonating pin and percussion detonator whereby a subsequent release of tubing pressure and upward sliding movement of the inner mandrel exposes the detonating pin to the percussion detonator to actuate the detonator and fire the perforating gun.
3-MANIFOLDS AFTER PERELMAN STEFAN FRIEDL
Friedl, Stefan
and hyperbolic 3Âmanifolds does not necessarily lead imme- diately to a good understanding of 3Âmanifolds statements should in partic- ular be taken with a grain of salt. Also note that Wise's results have not been
On the geography of symplectic manifolds Proefschrift
Pasquotto, Federica
On the geography of symplectic manifolds Proefschrift ter verkrijging van de graad van Doctor aan the geography of symplectic manifolds. #12;Federica Pasquotto Mathematisch Instituut, Universiteit Leiden of symplectic geography. Symplectic geography is a suitable subject of study when considering symplectic
Apparatus and method for sealing perforated well casing
Blount, C.G.; Benham, R.A.; Brock, J.L.; Emerson, J.A.; Ferguson, K.R.; Scheve, D.F.; Schmidt, J.H.; Schuler, K.W.; Stanton, P.L.
1997-03-25
Perforations and other openings in well casings, liners and other conduits may be substantially blocked or sealed to prevent fluid flow between the casing or liner interior and an earth formation by placing a radially expansible sleeve adjacent the perforations or openings and urging the sleeve into forcible engagement with the casing or inner wall using an explosive charge. An apparatus including a radially contracted sleeve formed by a coiled plate member or a tubular member having flutes defined by external and internal folds, may be deployed into a well casing or liner through a production or injection tubing string and on the end of a flexible cable or coilable tubing. An explosive charge disposed on the apparatus and within the sleeve may be detonated to urge the sleeve into forcible engagement with the casing inner wall. 17 figs.
Geometric control of failure behavior in perforated sheets
Michelle M. Driscoll
2014-11-20
Adding perforations to a continuum sheet allows new modes of deformation, and thus modifies its elastic behavior. The failure behavior of such a perforated sheet is explored, using a model experimental system: a material containing a one-dimensional array of rectangular holes. In this model system, a transition in failure mode occurs as the spacing and aspect ratio of the holes are varied: rapid failure via a running crack is completely replaced by quasi-static failure which proceeds via the breaking of struts at random positions in the array of holes. I demonstrate that this transition can be connected to the loss of stress enhancement which occurs as the material geometry is modified.
Temperature Driven Annealing of Perforations in Bicellar Model Membranes
Nieh, Mu-Ping [University of Connecticut, Storrs; Raghunathan, V.A. [Raman Research Institute, India; Pabst, Georg [Austrian Academy of Sciences, Graz, Austria; Harroun, Thad [Brock University, St. Catharines, ON, Canada; Nagashima, K [University of Toronto, Mississauga, ON, Canada; Morales, H [University of Toronto, Mississauga, ON, Canada; Katsaras, John [ORNL; Macdonald, P [University of Toronto, Mississauga, ON, Canada
2011-01-01
Bicellar model membranes composed of 1,2-dimyristoylphosphatidylcholine (DMPC) and 1,2-dihexanoylphosphatidylcholine (DHPC), with a DMPC/DHPC molar ratio of 5, and doped with the negatively charged lipid 1,2-dimyristoylphosphatidylglycerol (DMPG), at DMPG/DMPC molar ratios of 0.02 or 0.1, were examined using small angle neutron scattering (SANS), {sup 31}P NMR, and {sup 1}H pulsed field gradient (PFG) diffusion NMR with the goal of understanding temperature effects on the DHPC-dependent perforations in these self-assembled membrane mimetics. Over the temperature range studied via SANS (300-330 K), these bicellar lipid mixtures exhibited a well-ordered lamellar phase. The interlamellar spacing d increased with increasing temperature, in direct contrast to the decrease in d observed upon increasing temperature with otherwise identical lipid mixtures lacking DHPC. {sup 31}P NMR measurements on magnetically aligned bicellar mixtures of identical composition indicated a progressive migration of DHPC from regions of high curvature into planar regions with increasing temperature, and in accord with the 'mixed bicelle model' (Triba, M. N.; Warschawski, D. E.; Devaux, P. E. Biophys. J.2005, 88, 1887-1901). Parallel PFG diffusion NMR measurements of transbilayer water diffusion, where the observed diffusion is dependent on the fractional surface area of lamellar perforations, showed that transbilayer water diffusion decreased with increasing temperature. A model is proposed consistent with the SANS, {sup 31}P NMR, and PFG diffusion NMR data, wherein increasing temperature drives the progressive migration of DHPC out of high-curvature regions, consequently decreasing the fractional volume of lamellar perforations, so that water occupying these perforations redistributes into the interlamellar volume, thereby increasing the interlamellar spacing.
Regier, Terry
Poverty of the Stimulus? A Rational Approach Amy Perfors1 (perfors@mit.edu), Joshua B. Tenenbaum1, MIT; 2 Department of Psychology, University of Chicago Abstract The Poverty of the Stimulus (Po that these generalizations can best be explained by innate knowledge, known as the argument from the Poverty of the Stimulus
Perforated plates for cryogenic regenerators and method of fabrication
Hendricks, John B. (Huntsville, AL)
1994-01-01
Perforated plates (10) having very small holes (14) with a uniform diameter throughout the plate thickness are prepared by a "wire drawing" process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal, and the can is extruded and restacked repeatedly, converting the billet to a wire of the desired hole diameter. At final size, the rod is then sliced into wafers, and the wires are removed by selective etching. This process is useful for plate metals of interest for high performance regenerator applications, in particular, copper, niobium, molybdenum, erbium, and other rare earth metals. Er.sub.3 Ni, which has uniquely favorable thermophysical properties for such applications, may be incorporated in regions of the plates by providing extrusion cans (20) containing erbium and nickel metals in a stacked array (53) with extrusion cans of the plate metal, which may be copper. The array is heated to convert the erbium and nickel metals to Er.sub.3 Ni. Perforated plates having two sizes of perforations (38, 42), one of which is small enough for storage of helium, are also disclosed.
Perforated plates for cryogenic regenerators and method of fabrication
Hendricks, J.B.
1994-03-29
Perforated plates having very small holes with a uniform diameter throughout the plate thickness are prepared by a [open quotes]wire drawing[close quotes] process in which a billet of sacrificial metal is disposed in an extrusion can of the plate metal, and the can is extruded and restacked repeatedly, converting the billet to a wire of the desired hole diameter. At final size, the rod is then sliced into wafers, and the wires are removed by selective etching. This process is useful for plate metals of interest for high performance regenerator applications, in particular, copper, niobium, molybdenum, erbium, and other rare earth metals. Er[sub 3]Ni, which has uniquely favorable thermophysical properties for such applications, may be incorporated in regions of the plates by providing extrusion cans containing erbium and nickel metals in a stacked array with extrusion cans of the plate metal, which may be copper. The array is heated to convert the erbium and nickel metals to Er[sub 3]Ni. Perforated plates having two sizes of perforations, one of which is small enough for storage of helium, are also disclosed. 10 figures.
Method and apparatus for perforating at cutting with a solid fueled gas mixture
Woytek, A.J.; Lileck, J.T.; Steigerwalt, E.J.
1984-05-08
A method for cutting pipe casings and concrete liners or perforating the same and localized portions of surrounding strata in an earth bore is set forth wherein a gas phase cutting or perforating jet mixture of fluorine and nitrogen trifluoride is delivered to the cutting or perforation site from the decomposition of a solid, normally stable, perfluoroammonium salt. An appropriate apparatus for delivering the gas mixture of fluorine and nitrogen trifluoride from the salt is also disclosed.
Viscosity method for Homogenization of Parabolic Nonlinear Equations in Perforated Domains
Kim, Sunghoon
2011-01-01
In this paper, we develop a viscosity method for Homogenization of Nonlinear Parabolic Equations constrained by highly oscillating obstacles or Dirichlet data in perforated domains. The Dirichlet data on the perforated domain can be considered as a constraint or an obstacle. Homogenization of nonlinear eigen value problems has been also considered to control the degeneracy of the Porous medium equation in perforated domains. For the simplicity, we consider obstacles that consist of cylindrical columns distributed periodically and perforated domains with punctured balls. If the decay rate of the capac- ity of columns or the capacity of punctured ball is too high or too small, the limit of u\\k{o} will converge to trivial solutions. The critical decay rates of having nontrivial solution are obtained with the construction of barriers. We also show the limit of u\\k{o} satisfies a homogenized equation with a term showing the effect of the highly oscillating obstacles or perforated domain in viscosity sense.
Stiefel and Grassmann manifolds in Quantum Chemistry
Eduardo Chiumiento; Michael Melgaard
2011-05-09
We establish geometric properties of Stiefel and Grassmann manifolds which arise in relation to Slater type variational spaces in many-particle Hartree-Fock theory and beyond. In particular, we prove that they are analytic homogeneous spaces and submanifolds of the space of bounded operators on the single-particle Hilbert space. As a by-product we obtain that they are complete Finsler manifolds. These geometric properties underpin state-of-the-art results on existence of solutions to Hartree-Fock type equations.
PAPER www.rsc.org/loc | Lab on a Chip Perforated membrane method for fabricating three-dimensional
Zare, Richard N.
PAPER www.rsc.org/loc | Lab on a Chip Perforated membrane method for fabricating three. Thin (~50 mm) perforated PDMS membranes are bonded to thicker (0.1 cm or more) PDMS slabs by means and three perforated membranes are demonstrated. We also present 3D PDMS microfluidic devices for display
Mode Evolution and Transmission Suppression in a Perforated Ultrathin Metallic Film in a perforated ultrathin metallic film (PUMF) with a periodic triangular array of holes. It is found for the future studies in PUMF-based structures and devices. Keywords Surface plasmon . Perforated ultrathin
Computation of the Flow of a Dual-Stream Jet with External Solid and Perforated Wedge Deflectors for
Papamoschou, Dimitri
Computation of the Flow of a Dual-Stream Jet with External Solid and Perforated Wedge Deflectors of the external jet plume with solid and perforated deflector flaps, the latter with 50% porosity. Flow computation for perforated flaps presents a particular challenge and is handled by use of a localized body
Anomalous Near-Field Heat Transfer between a Cylinder and a Perforated Surface Alejandro W between a cylinder and a perforated surface depends nonmonotonically on their separation. This anomalous between a cylinder (or elongated object) and a perforated surface (e.g., a ring) can vary nonmonotonically
Mechanical seal having a single-piece, perforated mating ring
Khonsari, Michael M. (Baton Rouge, LA); Somanchi, Anoop K. (Fremont, CA)
2007-08-07
A mechanical seal (e.g., single mechanical seals, double mechanical seals, tandem mechanical seals, bellows, pusher mechanical seals, and all types of rotating and reciprocating machines) with reduced contact surface temperature, reduced contact surface wear, or increased life span. The mechanical seal comprises a rotating ring and a single-piece, perforated mating ring, which improves heat transfer by controllably channeling coolant flow through the single-piece mating ring such that the coolant is in substantially uniform thermal contact with a substantial portion of the interior surface area of the seal face, while maintaining the structural integrity of the mechanical seal and minimizing the potential for coolant flow interruptions to the seal face caused by debris or contaminants (e.g., small solids and trash) in the coolant.
NUMERICAL CONSTRAINTS FOR EMBEDDED PROJECTIVE MANIFOLDS
Besana, Gian Mario
an n- fold X in P2n is related to the number of double points of a generic projection of X from P2n+1. Double point formulas, expressing these constraints in terms of Chern classes of the manifolds and its case of the Laksov-Todd double point formula, [37]. An excellent general reference is due to Kleiman
Subsea manifolds become a practical matter
Not Available
1985-05-01
Norwegian deep waters are providing a powerful incentive for using subsea manifolds. Some of the most important conceptual and practical work is being done by ACB, Nantes. ACB's ''Reliability through Simplicity'' philosophy could ultimately help to bring down subsea costs. This might be used to open up the UK's large number of marginal fields in moderate depths by tying production back to existing installations.
A Generalized Construction of Mirror Manifolds
P. Berglund; T. Hübsch
1992-01-09
We generalize the known method for explicit construction of mirror pairs of $(2,2)$-superconformal field theories, using the formalism of Landau-Ginzburg orbifolds. Geometrically, these theories are realized as Calabi-Yau hypersurfaces in weighted projective spaces. This generalization makes it possible to construct the mirror partners of many manifolds for which the mirror was not previously known.
Drilling long geodesics in hyperbolic 3-manifolds K. Bromberg
Bromberg, Kenneth
Drilling long geodesics in hyperbolic 3-manifolds K. Bromberg September 22, 2006 1 Introduction to such a deformation as drilling and results which compare the geometry of the original manifold to the geometry of the drilled manifold as drilling theorems. The first results of this type are due to Hodgson and Kerckhoff
Manifold gasket accommodating differential movement of fuel cell stack
Kelley, Dana A. (New Milford, CT); Farooque, Mohammad (Danbury, CT)
2007-11-13
A gasket for use in a fuel cell system having at least one externally manifolded fuel cell stack, for sealing the manifold edge and the stack face. In accordance with the present invention, the gasket accommodates differential movement between the stack and manifold by promoting slippage at interfaces between the gasket and the dielectric and between the gasket and the stack face.
Anomalous Near-Field Heat Transfer between a Cylinder and a Perforated Surface
Rodriguez-Wong, Alejandro
We predict that the near-field radiative heat-transfer rate between a cylinder and a perforated surface depends nonmonotonically on their separation. This anomalous behavior, which arises due to evanescent-wave effects, ...
Numerical simulations of perforated plate stabilized premixed flames with detailed chemistry
Kedia, Kushal Sharad
2010-01-01
The objective of this work is to develop a high efficiency two-dimensional reactive flow solver to investigate perforated-plate stabilized laminar premixed flames. The developed code is used to examine the impact of the ...
Localization effect for a spectral problem in a perforated domain with Fourier boundary cconditions
Valeria Chiado Piat; Iryna Pankratova; Andrey Piatnitski
2012-11-16
We consider a homogenization of elliptic spectral problem stated in a perforated domain, Fourier boundary conditions being imposed on the boundary of perforation. The presence of a locally periodic coefficient in the boundary operator gives rise to the effect of a localization of the eigenfunctions. Moreover, the limit behaviour of the lower part of the spectrum can be described in terms of an auxiliary harmonic oscillator operator. We describe the asymptotics of the eigenpairs and derive the estimates for the rate of convergence.
Test Report for Perforated Metal Air Transportable Package (PMATO) Prototype.
Bobbe, Jeffery G.; Pierce, Jim Dwight
2003-06-01
A prototype design for a plutonium air transport package capable of carrying 7.6 kg of plutonium oxide and surviving a ''worst-case'' plane crash has been developed by Sandia National Laboratories (SNL) for the Japan Nuclear Cycle Development Institute (JNC). A series of impact tests were conducted on half-scale models of this design for side, end, and comer orientations at speeds close to 282 m/s onto a target designed to simulate weathered sandstone. These tests were designed to evaluate the performance of the overpack concept and impact-limiting materials in critical impact orientations. The impact tests of the Perforated Metal Air Transportable Package (PMATP) prototypes were performed at SNL's 10,000-ft rocket sled track. This report describes test facilities calibration and environmental testing methods of the PMATP under specific test conditions. The tests were conducted according to the test plan and procedures that were written by the authors and approved by SNL management and quality assurance personnel. The result of these tests was that the half-scale PMATP survived the ''worst-case'' airplane crash conditions, and indicated that a full-scale PMATP, utilizing this overpack concept and these impact-limiting materials, would also survive these crash conditions.
Energy-momentum balance in particle - domain wall perforating collision
D. V. Gal'tsov; E. Yu. Melkumova; P. A. Spirin
2015-02-10
We investigate the energy-momentum balance in the perforating collision of a point particle with an infinitely thin planar domain wall within the linearized gravity in arbitrary dimensions. Since the metric of the wall increases with distance, the wall and the particle are never free, and their energy-momentum balance involves not only the instantaneous kinetic momenta, but also the non-local contribution of gravitational stresses. However, careful analysis shows that the stresses can be unambiguously divided between the colliding objects leading to definition of the gravitationally dressed momenta. These take into account for gravity in the same way as the potential energy does in the non-relativistic theory, but our treatment is fully relativistic. Another unusual feature of our problem is the non-vanishing flux of the total energy-momentum tensor through the lateral surface of the world tube. In this case the zero divergence of the energy-momentum tensor does not imply conservation of the total momentum defined as the integral over the space-like section of the tube. But one can still define the conservation low infinitesimally, passing to time derivatives of the momenta. Using this definition we establish the momentum balance in terms of the dressed particle and wall momenta.
Global expenditure on subsea manifolds is estimated to reach...
demand. The global subsea manifold market is growing at a high pace as several oil and gas exploration companies working in offshore locations prefer installing subsea...
Engine Air Intake Manifold Having Built In Intercooler
Freese, V, Charles E. (Westland, MI)
2000-09-12
A turbocharged V type engine can be equipped with an exhaust gas recirculation cooler integrated into the intake manifold, so as to achieve efficiency, cost reductions and space economization improvements. The cooler can take the form of a tube-shell heat exchanger that utilizes a cylindrical chamber in the air intake manifold as the heat exchanger housing. The intake manifold depends into the central space formed by the two banks of cylinders on the V type engine, such that the central space is effectively utilized for containing the manifold and cooler.
Optical manifold for light-emitting diodes
Chaves, Julio C.; Falicoff, Waqidi; Minano, Juan C.; Benitez, Pablo; Parkyn, Jr., William A.; Alvarez, Roberto; Dross, Oliver
2008-06-03
An optical manifold for efficiently combining a plurality of blue LED outputs to illuminate a phosphor for a single, substantially homogeneous output, in a small, cost-effective package. Embodiments are disclosed that use a single or multiple LEDs and a remote phosphor, and an intermediate wavelength-selective filter arranged so that backscattered photoluminescence is recycled to boost the luminance and flux of the output aperture. A further aperture mask is used to boost phosphor luminance with only modest loss of luminosity. Alternative non-recycling embodiments provide blue and yellow light in collimated beams, either separately or combined into white.
Subsea Manifolds Market | OpenEI Community
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeter BatterySolarfinMarket StudiesStrategic EnergyStresniManifolds Market
Subsea Manifolds | OpenEI Community
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeter BatterySolarfinMarket StudiesStrategic EnergyStresniManifolds
NASH-STAMPACCHIA EQUILIBRIUM POINTS ON MANIFOLDS ALEXANDRU KRISTALY
NASH-STAMPACCHIA EQUILIBRIUM POINTS ON MANIFOLDS ALEXANDRU KRIST´ALY Abstract. Motivated by Nash equilibrium problems on 'curved' strategy sets, the concept of Nash-Stampacchia equilibrium points Riemannian manifolds. Characterization, existence, and stability of Nash- Stampacchia equilibria are studied
ASYMPTOTIC PROPERTIES OF THE HEAT KERNEL ON CONIC MANIFOLDS
Loya, Paul
ASYMPTOTIC PROPERTIES OF THE HEAT KERNEL ON CONIC MANIFOLDS PAUL LOYA Abstract. We derive Foundation Fellowship. 1 #12; 2 PAUL LOYA Trace expansions of cone operators has a long history stemming from on conic manifolds; see for instance, Callias [5], Cheeger [7], Chou [9], BrË?uning--Seeley [3], Br
General relativity calculus with SageManifolds Eric Gourgoulhon1
Gourgoulhon, Eric
, Poland http://users.camk.edu.pl/bejger/ CoCoNuT Meeting 2013 Observatoire de Paris, Meudon 4 December 2013 ´Eric Gourgoulhon, Michal Bejger (LUTH, CAMK) SageManifolds CoCoNuT Meeting, 4 Dec. 2013 1 / 21 Gourgoulhon, Michal Bejger (LUTH, CAMK) SageManifolds CoCoNuT Meeting, 4 Dec. 2013 2 / 21 #12;An overview
Manifold to uniformly distribute a solid-liquid slurry
Kern, Kenneth C. (Lake Hiawatha, NJ)
1983-01-01
This invention features a manifold that divides a stream of coal particles and liquid into several smaller streams maintaining equal or nearly equal mass compositions. The manifold consists of a horizontal, variable area header having sharp-edged, right-angled take-offs which are oriented on the bottom of the header.
RESONANCES AND SCATTERING POLES ON ASYMPTOTICALLY HYPERBOLIC MANIFOLDS
Guillarmou, Colin
RESONANCES AND SCATTERING POLES ON ASYMPTOTICALLY HYPERBOLIC MANIFOLDS COLIN GUILLARMOU Abstract. On an asymptotically hyperbolic manifold (X; g), we show that the poles (called resonances) of the meromorphic extension of the resolvent (#1;g #21;(n #21;)) 1 coincide, with multiplicities, with the poles (called
Dual manifold system and method for fluid transfer
Doktycz, Mitchel J. (Knoxville, TN); Bryan, William Louis (Knoxville, TN); Kress, Reid (Oak Ridge, TN)
2003-05-27
A dual-manifold assembly is provided for the rapid, parallel transfer of liquid reagents from a microtiter plate to a solid state microelectronic device having biological sensors integrated thereon. The assembly includes aspiration and dispense manifolds connected by a plurality of conduits. In operation, the aspiration manifold is actuated such that the aspiration manifold is seated onto an array of reagent-filled wells of the microtiter plate. The wells are pressurized to force reagent through conduits toward the dispense manifold. A pressure pulse provided by a standard ink-jet printhead ejects nanoliter-to-picoliter droplets of reagent through an array of printhead orifices and onto test sites on the surface of the microelectronic device.
Dual manifold system and method for fluid transfer
Doktycz, Mitchel J.; Bryan, William Louis; Kress, Reid
2003-09-30
A dual-manifold assembly is provided for the rapid, parallel transfer of liquid reagents from a microtiter plate to a solid state microelectronic device having biological sensors integrated thereon. The assembly includes aspiration and dispense manifolds connected by a plurality of conduits. In operation, the aspiration manifold is actuated such that the aspiration manifold is seated onto an array of reagent-filled wells of the microtiter plate. The wells are pressurized to force reagent through conduits toward the dispense manifold. A pressure pulse provided by a standard ink-jet printhead ejects nanoliter-to-picoliter droplets of reagent through an array of printhead orifices and onto test sites on the surface of the microelectronic device.
Manifold corrections on spinning compact binaries
Zhong Shuangying; Wu Xin [Nanchang University, Nanchang 330031 (China)
2010-05-15
This paper deals mainly with a discussion of three new manifold correction methods and three existing ones, which can numerically preserve or correct all integrals in the conservative post-Newtonian Hamiltonian formulation of spinning compact binaries. Two of them are listed here. One is a new momentum-position scaling scheme for complete consistency of both the total energy and the magnitude of the total angular momentum, and the other is the Nacozy's approach with least-squares correction of the four integrals including the total energy and the total angular momentum vector. The post-Newtonian contributions, the spin effects, and the classification of orbits play an important role in the effectiveness of these six manifold corrections. They are all nearly equivalent to correct the integrals at the level of the machine epsilon for the pure Kepler problem. Once the third-order post-Newtonian contributions are added to the pure orbital part, three of these corrections have only minor effects on controlling the errors of these integrals. When the spin effects are also included, the effectiveness of the Nacozy's approach becomes further weakened, and even gets useless for the chaotic case. In all cases tested, the new momentum-position scaling scheme always shows the optimal performance. It requires a little but not much expensive additional computational cost when the spin effects exist and several time-saving techniques are used. As an interesting case, the efficiency of the correction to chaotic eccentric orbits is generally better than one to quasicircular regular orbits. Besides this, the corrected fast Lyapunov indicators and Lyapunov exponents of chaotic eccentric orbits are large as compared with the uncorrected counterparts. The amplification is a true expression of the original dynamical behavior. With the aid of both the manifold correction added to a certain low-order integration algorithm as a fast and high-precision device and the fast Lyapunov indicators of two nearby trajectories, phase space scans for chaos in the spinning compact binary system are given.
Denis Borisov; Giuseppe Cardone; Tiziana Durante
2015-03-21
We consider an infinite planar straight strip perforated by small holes along a curve. In such domain, we consider a general second order elliptic operator subject to classical boundary conditions on the holes. Assuming that the perforation is non-periodic and satisfies rather weak assumptions, we describe all possible homogenized problems. Our main result is the norm resolvent convergence of the perturbed operator to a homogenized one in various operator norms and the estimates for the rate of convergence. On the basis of the norm resolvent convergence, we prove the convergence of the spectrum.
Permeability through a perforated domain for the incompressible 2D Euler equations
Virginie Bonnaillie-Noël; Christophe Lacave; Nader Masmoudi
2013-06-17
We investigate the influence of a perforated domain on the 2D Euler equations. Small inclusions of size $\\varepsilon$ are uniformly distributed on the unit segment or a rectangle, and the fluid fills the exterior. These inclusions are at least separated by a distance $\\varepsilon^\\alpha$ and we prove that for $\\alpha$ small enough (namely, less than 2 in the case of the segment, and less than 1 in the case of the square), the limit behavior of the ideal fluid does not feel the effect of the perforated domain at leading order when $\\varepsilon\\to 0$.
Marrucci, Lorenzo
SUMMARY Recently published international rankings indicate that the perfor- mance gap between with the research perfor- mance of its universities. Europe invests too little in higher education. It is generally
Hebard, Arthur F.
Trapped Electromagnetic Modes and Scaling in the Transmittance of Perforated Metal Films S. Selcuk that light would not be transmitted by a metal film perforated by a set of holes with size smaller than
Relativistic fluid mechanics, Kahler manifolds and supersymmetry
T. S. Nyawelo; J. W. van Holten; S. Groot Nibbelink
2003-09-11
We propose an alternative for the Clebsch decomposition of currents in fluid mechanics, in terms of complex potentials taking values in a Kahler manifold. We reformulate classical relativistic fluid mechanics in terms of these complex potentials and rederive the existence of an infinite set of conserved currents. We perform a canonical analysis to find the explicit form of the algebra of conserved charges. The Kahler-space formulation of the theory has a natural supersymmetric extension in 4-D space-time. It contains a conserved current, but also a number of additional fields complicating the interpretation. Nevertheless, we show that an infinite set of conserved currents emerges in the vacuum sector of the additional fields. This sector can therefore be identified with a regime of supersymmetric fluid mechanics. Explicit expressions for the current and the density are obtained.
On the effect of perforated plates on the acoustics of annular combustors
Nicoud, Franck
the influence of perforated plates on the acoustic modes in aeronautical gas turbines combustion chambers quantity I. Introduction In order to cut down pollutant emissions, industrial gas turbine combustion and dilution holes [14, 15]. In aeronautical gas turbines, walls of recent combustion chambers are generally
Cerna, Marie; Koecher, Martin Valek, Vlastimil; Aujesky, Rene; Neoral, Cestmir; Andrasina, Tomas; Panek, Jiri; Mahathmakanthi, Shankari
2011-12-15
Purpose: This study was designed to evaluate our experience with the treatment of postoperative anastomotic leaks and benign esophageal perforations with covered biodegradable stents. Materials and Methods: From 2008 to 2010, we treated five men with either an anastomotic leak or benign esophageal perforation by implanting of covered biodegradable Ella-BD stents. The average age of the patients was 60 (range, 38-74) years. Postoperative anastomotic leaks were treated in four patients (1 after esophagectomy, 1 after resection of diverticulum, 2 after gastrectomy). In one patient, perforation occurred as a complication of the treatment of an esophageal rupture (which occurred during a balloon dilatation of benign stenosis) with a metallic stent. Results: Seven covered biodegradable stents were implanted in five patients. Primary technical success was 100%. Clinical success (leak sealing) was achieved in four of the five patients (80%). Stent migration occurred in three patients. In two of these patients, the leak had been sealed by the time of stent migration, therefore no reintervention was necessary. In one patient an additional stent had to be implanted. Conclusion: The use of biodegradable covered stents for the treatment of anastomotic leaks or esophageal perforations is technically feasible and safe. The initial results are promising; however, larger number of patients will be required to evaluate the capability of these biodegradable stents in the future. The use of biodegradable material for coverage of the stent is essential.
An adiabatic homogeneous model for the flow around a multi-perforated plate
Mendez, Simon
homogeneous model to account for multi-perforated lin- ers in combustion chamber flow simulations is described in industrial full-scale computations of gas turbine combustion chambers, where effusion cooling is commonly in the streamwise direction Post-doctoral fellow, CFD team, mendez@cerfacs.fr, AIAA Member Professor, I3M CNRS UMR
Random homogenization of p-Laplacian with obstacles in perforated domain
Tang, Lan
2010-01-01
In this paper,we will study the homogenization of $p$-Laplacian with obstacles in perforated domain, where the holes are periodically distributed and have random size. And we also assume that the $p$-capacity of each hole is stationary ergodic.
Douanla, Hermann Yonta
2011-01-01
Spectral asymptotics of linear periodic elliptic operators with indefinite (sign-changing) density function is investigated in perforated domains with the two-scale convergence method. The limiting behavior of positive and negative eigencouples depends crucially on whether the average of the weight over the solid part is positive, negative or equal to zero. We prove concise homogenization results in all three cases.
Hermann Yonta Douanla
2012-08-21
Spectral asymptotics of linear periodic elliptic operators with indefinite (sign-changing) density function is investigated in perforated domains with the two-scale convergence method. The limiting behavior of positive and negative eigencouples depends crucially on whether the average of the weight over the solid part is positive, negative or equal to zero. We prove concise homogenization results in all three cases.
HARMONIC MAPPINGS BETWEEN RIEMANNIAN MANIFOLDS Anand Arvind Joshi
Leahy, Richard M.
HARMONIC MAPPINGS BETWEEN RIEMANNIAN MANIFOLDS by Anand Arvind Joshi A Thesis Presented ii Abstract iv 1 Harmonic Mappings 1 1.1 Space of Maps Variation Formula . . . . . . . . . . . . . . . . . . . . . . . . 11 1.4 Harmonic Maps
Classification of Certain Compact Riemannian Manifolds with Harmonic Curvature a...
Derdzinski, Andrzej
Classification of Certain Compact Riemannian Manifolds with Harmonic Curvature a... Derdzinski and University Library provides access to digitized documents strictly for noncommercial educational, research) requires prior written permission from the Goettingen State- and University Library. Each copy of any part
Fixed points, stable manifolds, weather regimes, and their predictability
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Deremble, Bruno; D'Andrea, Fabio; Ghil, Michael
2009-10-27
In a simple, one-layer atmospheric model, we study the links between low-frequency variability and the model’s fixed points in phase space. The model dynamics is characterized by the coexistence of multiple ''weather regimes.'' To investigate the transitions from one regime to another, we focus on the identification of stable manifolds associated with fixed points. We show that these manifolds act as separatrices between regimes. We track each manifold by making use of two local predictability measures arising from the meteorological applications of nonlinear dynamics, namely, ''bred vectors'' and singular vectors. These results are then verified in the framework of ensemblemore »forecasts issued from clouds (ensembles) of initial states. The divergence of the trajectories allows us to establish the connections between zones of low predictability, the geometry of the stable manifolds, and transitions between regimes.« less
Motion planning and reactive control on learnt skill manifolds
Havoutis, Ioannis
2012-06-25
We propose a novel framework for motion planning and control that is based on a manifold encoding of the desired solution set. We present an alternate, model-free, approach to path planning, replanning and control. Our ...
Jacobi Fields on Statistical Manifolds of Negative Curvature
Carlo Cafaro; S. A. Ali
2007-02-14
Two entropic dynamical models are considered. The geometric structure of the statistical manifolds underlying these models is studied. It is found that in both cases, the resulting metric manifolds are negatively curved. Moreover, the geodesics on each manifold are described by hyperbolic trajectories. A detailed analysis based on the Jacobi equation for geodesic spread is used to show that the hyperbolicity of the manifolds leads to chaotic exponential instability. A comparison between the two models leads to a relation among statistical curvature, stability of geodesics and relative entropy-like quantities. Finally, the Jacobi vector field intensity and the entropy-like quantity are suggested as possible indicators of chaoticity in the ED models due to their similarity to the conventional chaos indicators based on the Riemannian geometric approach and the Zurek-Paz criterion of linear entropy growth, respectively.
Fixed points, stable manifolds, weather regimes, and their predictability
Deremble, Bruno [Laboratoire de Meteorologie Dynamique (CNRS and IPSL), Paris (France); D'Andrea, Fabio [Laboratoire de Meteorologie Dynamique (CNRS and IPSL), Paris (France); Ghil, Michael [Univ. of California, Los Angeles, CA (United Staes). Atmospheric and Oceanic Sciences and Inst. of Geophysics and Planetary Physics
2009-10-27
In a simple, one-layer atmospheric model, we study the links between low-frequency variability and the model’s fixed points in phase space. The model dynamics is characterized by the coexistence of multiple ''weather regimes.'' To investigate the transitions from one regime to another, we focus on the identification of stable manifolds associated with fixed points. We show that these manifolds act as separatrices between regimes. We track each manifold by making use of two local predictability measures arising from the meteorological applications of nonlinear dynamics, namely, ''bred vectors'' and singular vectors. These results are then verified in the framework of ensemble forecasts issued from clouds (ensembles) of initial states. The divergence of the trajectories allows us to establish the connections between zones of low predictability, the geometry of the stable manifolds, and transitions between regimes.
3-MANIFOLDS, TANGLES AND PERSISTENT INVARIANTS JOZEF H. PRZYTYCKI
Silver, Dan
in the last section. We are grateful to J. Scott Carter, Mietek D¸abkowski and Seiichi Kamada for stimu3-MANIFOLDS, TANGLES AND PERSISTENT INVARIANTS J´OZEF H. PRZYTYCKI Department of Mathematics
Fixed points, stable manifolds, weather regimes, and their predictability
DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)
Deremble, Bruno [Laboratoire de Meteorologie Dynamique (CNRS and IPSL), Paris (France); D'Andrea, Fabio [Laboratoire de Meteorologie Dynamique (CNRS and IPSL), Paris (France); Ghil, Michael [Univ. of California, Los Angeles, CA (United Staes). Atmospheric and Oceanic Sciences and Inst. of Geophysics and Planetary Physics
2009-01-01
In a simple, one-layer atmospheric model, we study the links between low-frequency variability and the model’s fixed points in phase space. The model dynamics is characterized by the coexistence of multiple ''weather regimes.'' To investigate the transitions from one regime to another, we focus on the identification of stable manifolds associated with fixed points. We show that these manifolds act as separatrices between regimes. We track each manifold by making use of two local predictability measures arising from the meteorological applications of nonlinear dynamics, namely, ''bred vectors'' and singular vectors. These results are then verified in the framework of ensemble forecasts issued from clouds (ensembles) of initial states. The divergence of the trajectories allows us to establish the connections between zones of low predictability, the geometry of the stable manifolds, and transitions between regimes.
Double Field Theory on Group Manifolds (Thesis)
Hassler, Falk
2015-01-01
This thesis deals with Double Field Theory (DFT), an effective field theory capturing the low energy dynamics of closed strings on a torus. It renders T-duality on a torus manifest by adding $D$ winding coordinates in addition to the $D$ space time coordinates. An essential consistency constraint of the theory, the strong constraint, only allows for field configurations which depend on half of the coordinates of the arising doubled space. I derive DFT${}_\\mathrm{WZW}$, a generalization of the current formalism. It captures the low energy dynamics of a closed bosonic string propagating on a compact group manifold. Its classical action and the corresponding gauge transformations arise from Closed String Field Theory up to cubic order in the massless fields. These results are rewritten in terms of a generalized metric and extended to all orders in the fields. There is an explicit distinction between background and fluctuations. For the gauge algebra to close, the latter have to fulfill a modified strong constrai...
The world problem: on the computability of the topology of 4-manifolds
James R. van Meter
2005-06-03
Topological classification of the 4-manifolds bridges computation theory and physics. A proof of the undecidability of the homeomorphy problem for 4-manifolds is outlined here in a clarifying way. It is shown that an arbitrary Turing machine with an arbitrary input can be encoded into the topology of a 4-manifold, such that the 4-manifold is homeomorphic to a certain other 4-manifold if and only if the corresponding Turing machine halts on the associated input. Physical implications are briefly discussed.
Andrey Piatnitski; Volodymyr Rybalko
2010-06-03
The paper deals with homogenization problem for nonlinear elliptic and parabolic equations in a periodically perforated domain, a nonlinear Fourier boundary conditions being imposed on the perforation border. Under the assumptions that the studied differential equation satisfies monotonicity and 2-growth conditions and that the coefficient of the boundary operator is centered at each level set of unknown function, we show that the problem under consideration admits homogenization and derive the effective model.
Piatnitski, Andrey
2010-01-01
The paper deals with homogenization problem for nonlinear elliptic and parabolic equations in a periodically perforated domain, a nonlinear Fourier boundary conditions being imposed on the perforation border. Under the assumptions that the studied differential equation satisfies monotonicity and 2-growth conditions and that the coefficient of the boundary operator is centered at each level set of unknown function, we show that the problem under consideration admits homogenization and derive the effective model.
Acharya, Jyotsna Bancroft, Karen; Lay, James
2012-12-15
We report a case of a 43-year-old woman who underwent uterine artery embolization (UAE) for a symptomatic large fibroid uterus and had spontaneous perforation of the transverse colon 3 months after embolisation with near-fatal consequences. We believe this is the first reported case in the literature of this serious complication of UAE. We briefly review the literature on bowel complications after UAE and discuss lessons to be learned regarding patient selection and postprocedure follow-up.
Flow and heat transfer in vertical annuli
Ulke, A.; Goldberg, I.
1993-11-01
In shell-side boiling heat exchangers narrow crevices that are formed between the tubes and the tube support structure provide areas for local conditions which differ significantly from the bulk fluid conditions. A quasi-two-dimensional model which was developed to describe the local phenomena in a vertical, cylindrical crevice was described previously. The present work compares experimentally obtained flow and tube temperature distributions to those predicted by the model. The results confirm the characteristic ``W`` shape of the tube temperature profile centered at the line contact between a heated tube and tube support.
Self-dual metrics on toric 4-manifolds: extending the Joyce construction
Griffiths, Hugh Norman
2009-01-01
Toric geometry studies manifolds M2n acted on effectively by a torus of half their dimension, Tn. Joyce shows that for such a 4-manifold sufficient conditions for a conformal class of metrics on the free part of the ...
Modeling and applications of two-phase flow distribution in manifolds under microgravity conditions
Young, Cale Hollis
1998-01-01
associated with the flow throughout a manifold was developed. This calculational procedure was developed in order to calculate the flow distribution throughout a system, given only the inlet flow conditions and an arbitrary manifold geometry. Sample...
Euler-Characteristic and signature of K"ahler hyperbolic manifolds
Schick, Thomas
manifolds Thomas Schick* Fachbereich". Then __________________________________________ *e-mail: thomas.schick@math.uni-muenster.de 1 #12
Harmonic Functions for Quadrilateral Remeshing of Arbitrary Manifolds
Garland, Michael
Harmonic Functions for Quadrilateral Remeshing of Arbitrary Manifolds S. Dong , S. Kircher, M on the use of smooth harmonic scalar fields defined over the mesh. Given such a field, we compute its for cutting the surface into patches. Key words: quad-dominant remeshing, gradient flow tracing, harmonic
Energy-Minimizing Splines in Manifolds Michael Hofer
Pottmann, Helmut
Energy-Minimizing Splines in Manifolds Michael Hofer Vienna Univ. of Technology Helmut Pottmann Vienna Univ. of Technology Abstract Variational interpolation in curved geometries has many applica of surfaces. This list is more comprehensive than it looks, because it includes variational motion design
FUSION OF HAMILTONIAN LOOP GROUP MANIFOLDS AND COBORDISM
Woodward, Christopher
FUSION OF HAMILTONIAN LOOP GROUP MANIFOLDS AND COBORDISM E. MEINRENKEN AND C. WOODWARD Abstract. We References 32 1. Introduction Let G be a compact, connected, simply connected, simple Lie group and \\Sigma. In a sequel [15] to this paper, we apply our method to compute the coefficients of the fusion ring (Verlinde
Geometric Integration: Numerical Solution of Differential Equations on Manifolds
Scheichl, Robert
and the solar system. Conserved quantities of a Hamiltonian system, such as energy, linear and angular momentumGeometric Integration: Numerical Solution of Differential Equations on Manifolds C.J. Budd 1 & A riches. Psalms 104:24 Since their introduction by Sir Isaac Newton, differential equations have played
Improving Exploration in UCT Using Local Manifolds Sriram Srinivasan
Bowling, Michael
Improving Exploration in UCT Using Local Manifolds Sriram Srinivasan University of Alberta ssriram of Alberta mbowling@cs.ualberta.ca Abstract Monte Carlo planning has been proven successful in many 4 actions available - move UP, DOWN, LEFT and RIGHT that work as suggested by their names
Subsea manifolds optimization -- The combination of mature and new technologies
Paulo, C.A.S.
1996-12-31
Subsea equipment can now be considered a mature option for offshore field developments. In Brazil, since the first oil in Campos Basin, different concepts ranging from one-atmosphere chambers to deepwater guidelineless X-mas trees, have been tested, contributing to this development. The experience acquired during these years makes it possible to combine the proven systems with new technologies being developed, for the design of subsea manifolds. The main target is more efficiency and cost reduction. When choosing a manifold concept, a usual rule is applicable: the simpler the better. The maturity, confidence and reliability obtained, allow the usage of resident hydraulically actuated valves, simplifying considerably the manifold arrangement. Other contributions come from: the reduction of piping bend radius allowed by the new pigs; the increased reliability of subsea instrumentation and chokes, allowing elimination of the gas-lift-test flowline; and the development of the direct vertical connection, that turns subsea tie-ins into very fast and easy operations. Combining all that with the new technology of a multiphase meter (to eliminate the test flowline and even the test separator on the platform), one can achieve a cost effective solution. This paper describes the possibilities of simplifying the subsea manifolds and presents a comparison of different designs. The usage of mature technology combined with the new developments, can help the industry to make deep water developments profitable, worldwide.
Weldability Of New Ferritic Stainless Steel For Exhaust Manifold Application
Paris-Sud XI, Université de
Weldability Of New Ferritic Stainless Steel For Exhaust Manifold Application Vincent Villaret1-2, a-marie.fortain@airliquide.com, e gilles.fras@iut-nimes.fr, f fabien.januard@airliquide.com Keywords: ferritic stainless steel, efficiency and small size. To achieve such requirements, ferritic stainless steels with high chromium content
Tuning manifold harmonics filters Thomas Lewiner, Thales Vieira, Alex Bordignon,
DĂaz, Lorenzo J.
Tuning manifold harmonics filters Thomas Lewiner, Thales Vieira, Alex Bordignon, Allyson Cabral : Thomas Lewiner, Thales Vieira, Alex Bordignon, Allyson Cabral, Clarissa Marques, Jo~ao Paix~ao, Lis Cust CABRAL1 , CLARISSA MARQUES1 , JO ~AO PAIX ~AO1 , LIS CUST Â´ODIO1 , MARCOS LAGE1 , MARIA ANDRADE1 , RENATA
ALMOST JET STRUCTURES AND FIRST JET-EXTENSIONS OF FIBRED MANIFOLDS
Pasquero, Stefano
ALMOST JET STRUCTURES AND FIRST JET-EXTENSIONS OF FIBRED MANIFOLDS Paola Morando Dipartimento di conditions for a manifold M to be diffeomorphic to the first jetÂextension j1(N) of a fibred manifold N O are given in terms of almost jet structures, i.e. pairs (S, A), where S is a suitable type (2, 1) tensor
Performance characteristics of a perforated shadow band under clear sky conditions
Brooks, Michael J.
2010-12-15
A perforated, non-rotating shadow band is described for separating global solar irradiance into its diffuse and direct normal components using a single pyranometer. Whereas shadow bands are normally solid so as to occult the sensor of a pyranometer throughout the day, the proposed band has apertures cut from its circumference to intermittently expose the instrument sensor at preset intervals. Under clear sky conditions the device produces a saw tooth waveform of irradiance data from which it is possible to reconstruct separate global and diffuse curves. The direct normal irradiance may then be calculated giving a complete breakdown of the irradiance curves without need of a second instrument or rotating shadow band. This paper describes the principle of operation of the band and gives a mathematical model of its shading mask based on the results of an optical ray tracing study. An algorithm for processing the data from the perforated band system is described and evaluated. In an extended trial conducted at NREL's Solar Radiation Research Laboratory, the band coupled with a thermally corrected Eppley PSP produced independent curves for diffuse, global and direct normal irradiance with low mean bias errors of 5.6 W/m{sup 2}, 0.3 W/m{sup 2} and -2.6 W/m{sup 2} respectively, relative to collocated reference instruments. Random uncertainties were 9.7 W/m{sup 2} (diffuse), 17.3 W/m{sup 2} (global) and 19.0 W/m{sup 2} (direct). When the data processing algorithm was modified to include the ray trace model of sensor exposure, uncertainties increased only marginally, confirming the effectiveness of the model. Deployment of the perforated band system can potentially increase the accuracy of data from ground stations in predominantly sunny areas where instrumentation is limited to a single pyranometer. (author)
Homogenization of Steklov spectral problems with indefinite density function in perforated domains
Douanla, Hermann Yonta
2011-01-01
The asymptotic behavior of second order self-adjoint elliptic Steklov eigenvalue problems with periodic rapidly oscillating coefficients and with indefinite (sign-changing) density function is investigated in periodically perforated domains. We prove that the spectrum of this problem is discrete and consists of two sequences, one tending to -{\\infty} and another towards +{\\infty}. The limiting behavior of positive and negative eigencouples depends crucially on whether the average of the weight over the surface of the reference hole is positive, negative or equal to zero. By means of the two-scale convergence method, we prove concise homogenization results in all three cases.
Homogenization of Steklov spectral problems with indefinite density function in perforated domains
Hermann Yonta Douanla
2012-08-21
The asymptotic behavior of second order self-adjoint elliptic Steklov eigenvalue problems with periodic rapidly oscillating coefficients and with indefinite (sign-changing) density function is investigated in periodically perforated domains. We prove that the spectrum of this problem is discrete and consists of two sequences, one tending to -{\\infty} and another to +{\\infty}. The limiting behavior of positive and negative eigencouples depends crucially on whether the average of the weight over the surface of the reference hole is positive, negative or equal to zero. By means of the two-scale convergence method, we investigate all three cases.
Wei, Zeyong; Fan, Yuancheng; Yu, Xing; Li, Hongqiang
2011-01-01
This paper theoretically and experimentally presents a first report on broadband enhanced transmission through stacked metallic multi-layers perforated with coaxial annular apertures (CAAs). Different from previous studies on extraordinary transmission that occurs at a single frequency, the enhanced transmission of our system with two or three metallic layers can span a wide frequency range with a bandwidth about 60% of the central frequency. The phenomena arise from the excitation and hybridization of guided resonance modes in CAAs among different layers. Measured transmission spectra are in good agreement with calculations semi-analytically resolved by modal expansion method.
Geometrical Interpretation of Electromagnetism in 5-Dimensional Manifold
Kim, TaeHun
2015-01-01
In this paper Kaluza-Klein theory is revisited and its implications are elaborated. We show that electromagnetic 4-potential is a deformation factor of a 5-dimensional (5D) manifold along the fifth (5th) axis. The charge-to-mass ratio has a physical meaning as the ratio of the movement along the direction of the 5th axis to the movement in the 4D space-time. Examinations on the interaction between particles registered by different observers suggest a covariance breaking of the 5th dimension. In order to have a 5D matter which is consistent with the construction of the 5D manifold, a notion of particle-thread is considered. Finally, the field equations which extend the Einstein field equations give the total energy-momentum tensor as a sum of that of matter, electromagnetic field, and the interaction between electric current and electromagnetic field.
Geometrical Interpretation of Electromagnetism in 5-Dimensional Manifold
TaeHun Kim; Hyunbyuk Kim
2015-07-12
In this paper Kaluza-Klein theory is revisited and its implications are elaborated. We show that electromagnetic 4-potential is a deformation factor of a 5-dimensional (5D) manifold along the fifth (5th) axis. The charge-to-mass ratio has a physical meaning as the ratio of the movement along the direction of the 5th axis to the movement in the 4D space-time. Examinations on the interaction between particles registered by different observers suggest a covariance breaking of the 5th dimension. In order to have a 5D matter which is consistent with the construction of the 5D manifold, a notion of particle-thread is considered. Finally, the field equations which extend the Einstein field equations give the total energy-momentum tensor as a sum of that of matter, electromagnetic field, and the interaction between electric current and electromagnetic field.
A volumetric Penrose inequality for conformally flat manifolds
Fernando Schwartz
2011-04-11
We consider asymptotically flat Riemannian manifolds with nonnegative scalar curvature that are conformal to $\\R^{n}\\setminus \\Omega, n\\ge 3$, and so that their boundary is a minimal hypersurface. (Here, $\\Omega\\subset \\R^{n}$ is open bounded with smooth mean-convex boundary.) We prove that the ADM mass of any such manifold is bounded below by $(V/\\beta_{n})^{(n-2)/n}$, where $V$ is the Euclidean volume of $\\Omega$ and $\\beta_{n}$ is the volume of the Euclidean unit $n$-ball. This gives a partial proof to a conjecture of Bray and Iga \\cite{brayiga}. Surprisingly, we do not require the boundary to be outermost.
Schneider, Glenn
on instrument perfor- mance John W. MacKenty, Glenn Schneider*, Sylvia M. Baggett, Dana D. Mitchell, Christine E
DeepStar evaluation of subsea trees and manifold concepts
Kirkland, K.G.; Richardson, E.M.; Hey, C.
1996-12-31
This paper reviews the results of a study performed for the DeepStar Project, CTR A802-2, Concept Study and Investigation of Key Areas of Interest for Subsea Systems in Deepwater. The report documents the results of a study of subsea manifold systems as applied to the deepwater Gulf of Mexico. Of particular interest is the development of a range of system level philosophies based on recent and ongoing experience from the operators and vendors.
SeaStar: Subsea cluster manifold system design and installation
Mason, P.G.T.; Upchurch, J.L.
1996-12-31
The SeaStar Cluster Manifold system was engineered as a low cost alternative to larger and more expensive completion template designs. Utilizing field-proven equipment and installation techniques, it was the first of its kind to be installed in the Gulf of Mexico. The Cluster Manifold system allows the connection of flowlines from adjacent satellite wells and numerous infield flowlines consisting of export, service, and methanol lines. With new technological advances, and a variety of flowline connection systems on the market today, deep water completions are being used with increasing frequency. Subsea operations are becoming more routine and installation times are being reduced. The SeaStar system was successfully installed in Garden Banks Block 70/71 in the Gulf of Mexico during the first quarter of 1995. Currently two 4 x 2-in. 10,000 psi lay-away trees are installed and connected to the manifold. Production is being processed at a Marathon platform in Vermilion Block 386B approximately 13.5 miles away from the subsea installation.
Ohbuchi, Ryutarou
printers,... User generated. T i bl 3D h· Trimble 3D warehouse... 3D model retrieval is essentialRanking on Cross Domain Manifold forRanking on Cross-Domain Manifold for Sketch-based 3D model Retrieval Takahiko FuruyaRyutarou Ohbuchi University of Yamanashi #12;IntroductionIntroduction 3D models
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
Nicoud, Franck
and Astronautics #12;I. Introduction In order to cut down pollutant emissions, industrial gas turbine combustion on the prediction of combustion instabilities.5,6 In aeronautical gas turbines, walls of recent combustion chambers aims at showing the influence of perforated plates on the acoustic modes in aeronautical gas turbines
Peirce, Anthony
of Bunger et al. (In Press) is consistent with past observations of multiple hydraulic fracture growth from Simultaneous Growth of Multiple Hydraulic Fractures A.P. Peirce, University of British Columbia and A.P. Bunger in horizontal well stimulation is the generation of hydraulic fractures (HFs) from all perforation clusters
Peirce, Anthony
Simultaneous Growth of Multiple Hydraulic Fractures A.P. Peirce, University of British Columbia and A.P. Bunger hurdles in horizontal well stimulation is the generation of hydraulic fractures (HFs) from all perforation shadowing" that refers to suppression of some hydraulic fractures by the compressive stresses exerted
Shultis, J. Kenneth
be realized for doubled or "sand- wiched" devices. Index Terms--Perforated detector, semiconductor neutron de neutron detection by a variety of re- search groups [1][14], all of which have generally used B, Li, Li 66506 USA (e-mail: mc- gregor@ksu.edu). Digital Object Identifier 10.1109/TNS.2006.872639 enter
Vladimir Maz'ya; Alexander Movchan; Michael Nieves
2010-05-24
We describe a method of asymptotic approximations to solutions of mixed boundary value problems for the Laplacian in a three-dimensional domain with many perforations of arbitrary shape, with the Neumann boundary conditions being prescribed on the surfaces of small voids. The only assumption made on the geometry is that the diameter of a void is assumed to be smaller compared to the distance to the nearest neighbour. The asymptotic approximation, obtained here, involves a linear combination of dipole fields constructed for individual voids, with the coefficients, which are determined by solving a linear algebraic system. We prove the solvability of this system and derive an estimate for its solution. The energy estimate is obtained for the remainder term of the asymptotic approximation.
Numerical simulation of high-speed penetration-perforation dynamics in layered armor shields
Ayzenberg-Stepanenko, Mark
2012-01-01
Penetration models and calculating algorithms are presented, describing the dynamics and fracture of composite armor shields penetrated by high-speed small arms. A shield considered consists of hard (metal or ceramic) facing and multilayered fabric backing. A simple formula is proved for the projectile residual velocity after perforation of a thin facing. A new plastic-flow jet model is proposed for calculating penetration dynamics in the case of a thick facing of ceramic or metal-ceramic FGM materials. By bringing together the developed models into a calculating algorithm, a computer tool is designed enabling simulations of penetration processes in the above-mentioned shields and analysis of optimization problems. Some results of computer simulation are presented. It is revealed in particular that strength proof of pliable backing can be better as compared with more rigid backing. Comparison of calculations and test data shows sufficient applicability of the models and the tool.
Maz'ya, Vladimir; Nieves, Michael
2010-01-01
We describe a method of asymptotic approximations to solutions of mixed boundary value problems for the Laplacian in a three-dimensional domain with many perforations of arbitrary shape, with the Neumann boundary conditions being prescribed on the surfaces of small voids. The only assumption made on the geometry is that the diameter of a void is assumed to be smaller compared to the distance to the nearest neighbour. The asymptotic approximation, obtained here, involves a linear combination of dipole fields constructed for individual voids, with the coefficients, which are determined by solving a linear algebraic system. We prove the solvability of this system and derive an estimate for its solution. The energy estimate is obtained for the remainder term of the asymptotic approximation.
Swaddiwudhipong, S; Liu, Z S
2012-01-01
Finite element method (FEM) suffers from a serious mesh distortion problem when used for high velocity impact analyses. The smooth particle hydrodynamics (SPH) method is appropriate for this class of problems involving severe damages but at considerable computational cost. It is beneficial if the latter is adopted only in severely distorted regions and FEM further away. The coupled smooth particle hydrodynamics - finite element method (SFM) has been adopted in a commercial hydrocode LS-DYNA to study the perforation of Weldox 460E steel and AA5083-H116 aluminum plates with varying thicknesses and various projectile nose geometries including blunt, conical and ogival noses. Effects of the SPH domain size and particle density are studied considering the friction effect between the projectile and the target materials. The simulated residual velocities and the ballistic limit velocities from the SFM agree well with the published experimental data. The study shows that SFM is able to emulate the same failure mechan...
Numerical simulation of high-speed penetration-perforation dynamics in layered armor shields
Mark Ayzenberg-Stepanenko; Grigory Osharovich
2012-03-07
Penetration models and calculating algorithms are presented, describing the dynamics and fracture of composite armor shields penetrated by high-speed small arms. A shield considered consists of hard (metal or ceramic) facing and multilayered fabric backing. A simple formula is proved for the projectile residual velocity after perforation of a thin facing. A new plastic-flow jet model is proposed for calculating penetration dynamics in the case of a thick facing of ceramic or metal-ceramic FGM materials. By bringing together the developed models into a calculating algorithm, a computer tool is designed enabling simulations of penetration processes in the above-mentioned shields and analysis of optimization problems. Some results of computer simulation are presented. It is revealed in particular that strength proof of pliable backing can be better as compared with more rigid backing. Comparison of calculations and test data shows sufficient applicability of the models and the tool.
Thickness effects on the plastic collapse of perforated plates with triangular penetration patterns
Gordon, J.L.; Jones, D.P.; Holliday, J.E.
2000-03-01
This paper investigates the effects of plate thickness on the accuracy of limit load solutions obtained using an elastic-perfectly plastic [EPP] equivalent solid [EQS] procedure for flat perforated plates with a triangular array of penetrations. The EQS approach for limit loads is based on an EQS collapse surface that is valid for generalized plane strain. This assumption is applicable for very thick plates but is known to be less reasonable for very thin plates where plane stress may be a better assumption. The limits of applicability of the generalized plane strain assumption are investigated by obtaining limit load solutions for perforated plates of various thicknesses that are subjected to in-plane and bending loads. Plastic limit load solutions obtained using three-dimensional EPP finite element analysis [FEA] of models which include each penetration explicitly are compared with solutions obtained using the EQS approximation. The penetration pattern chosen for this study has a ligament efficiency (ligament width-to-pitch ratio, h/P) of 0.32. For plates thicker than the pitch, the limit load calculated using the EQS method for both in-plane and bending loads is shown to be very accurate (within 4%) of the limit load calculated for the explicit model. On the other hand, for thin plates (t/P< 2), the EQS limit load is 5% greater than the explicit limit load for bending and 8% greater than the explicit limit load for in-plane loads. For thinner plates, the collapse surface is tied to the local geometry deformation and, hence, an equivalent solid plate representation of plastic collapse is a function of deformation mode and thickness.
Odd Jacobi manifolds: general theory and applications to generalised Lie algebroids
Andrew James Bruce
2012-06-28
In this paper we define a Grassmann odd analogue of Jacobi structure on a supermanifold. The basic properties are explored. The construction of odd Jacobi manifolds is then used to reexamine the notion of a Jacobi algebroid. It is shown that Jacobi algebroids can be understood in terms of a kind of curved Q-manifold, which we will refer to as a quasi Q-manifold.
Notes on Feynman path integral-like methods of quantization on Riemannian manifolds
Yoshihisa Miyanishi
2015-12-20
We propose an alternative method for Feynman path integrals on compact Riemannian manifolds. Our method employs action integrals along the shortest paths. In the case of rank 1 locally symmetric Riemannian manifolds, we prove the strong convergence of time slicing products of oscillatory integrals for low energy functions. Moreover, the strong limit includes Dewitt curvature $R/6$, where $R$ denotes the scalar curvature of a Riemannian manifold.
Model building with intersecting D6-branes on smooth Calabi-Yau manifolds
Eran Palti
2009-02-20
We study intersecting D6-branes in Calabi-Yau manifolds that are smooth hypersurfaces in weighted projective spaces. We develop the techniques for calculating intersection numbers between special Lagrangian sub-manifolds defined as fixed loci of anti-holomorphic involutions. We present global Pati-Salam and MSSM-like models that are supersymmetric up to a decoupled hidden sector.
Learning from Manifold-Valued Data: An Application to Seismic Signal Processing
Meyer, Francois
Learning from Manifold-Valued Data: An Application to Seismic Signal Processing by Juan Ramirez Jr to Seismic Signal Processing written by Juan Ramirez Jr. has been approved for the Department of Electrical., Juan (M.S., Electrical Engineering) Learning from Manifold-Valued Data: An Application to Seismic
Hamilton-Jacobi Equations on a Manifold and Applications to Grid Generation or Re nement.
Hamilton-Jacobi Equations on a Manifold and Applications to Grid Generation or Re#28;nement. Ph Hamilton-Jacobi equations on a manifold, typically on the graph of some previously computed function z method. Keywords: Hamilton-Jacobi equations, viscosity solutions, level set method, adaptative meshes
Tensor calculus with open-source software: the SageManifolds project
Eric Gourgoulhon; Michal Bejger; Marco Mancini
2014-12-21
The SageManifolds project aims at extending the mathematics software system Sage towards differential geometry and tensor calculus. Like Sage, SageManifolds is free, open-source and is based on the Python programming language. We discuss here some details of the implementation, which relies on Sage's parent/element framework, and present a concrete example of use.
Toric data and Killing forms on homogeneous Sasaki-Einstein manifold $T^{1,1}$
Vladimir Slesar; Mihai Visinescu; Gabriel Eduard Vilcu
2015-03-02
Throughout this paper we investigate the complex structure of the conifold $C(T^{1,1})$ basically making use of the interplay between symplectic and complex approaches of the K\\"{a}hler toric manifolds. The description of the Calabi-Yau manifold $C(T^{1,1})$ using toric data allows us to write explicitly the complex coordinates and apply standard methods for extracting special Killing forms on the base manifold. As an outcome, we obtain the complete set of special Killing forms on the five-dimensional Sasaki-Einstein space $T^{1,1}$.
Mechanical Systems on an almost Kähler model of a Finsler Manifold
Mehmet Tekkoyun; O?uzhan Çelik
2012-11-06
In this study, we present a new analogue of Euler-Lagrange and Hamilton equations on an almost K\\"ahler model of a Finsler manifold. Also, we give some corollories about the related mechanical systems and equations.
Asymptotic behavior of complete Ricci-flat metrics on open manifolds
Santoro, Bianca
2006-01-01
In this thesis, we describe the asymptotic behavior of complete Ricci-flat Kihler metrics on open manifolds that can be compactified by adding a smooth, ample divisor. This result provides an answer to a question addressed ...
Characterization and parameterization of the singular manifold of a simple 6-6 Stewart platform
T. Charters; P. Freitas
2008-11-07
This paper presents a study of the characterization of the singular manifold of the six-degree-of-freedom parallel manipulator commonly known as the Stewart platform. We consider a platform with base vertices in a circle and for which the bottom and top plates are related by a rotation and a contraction. It is shown that in this case the platform is always in a singular configuration and that the singular manifold can be parameterized by a scalar parameter.
Superization of Homogeneous Spin Manifolds and Geometry of Homogeneous Supermanifolds
Andrea Santi
2009-05-24
Let M_0=G_0/H be a (pseudo)-Riemannian homogeneous spin manifold, with reductive decomposition g_0=h+m and let S(M_0) be the spin bundle defined by the spin representation Ad:H->\\GL_R(S) of the stabilizer H. This article studies the superizations of M_0, i.e. its extensions to a homogeneous supermanifold M=G/H whose sheaf of superfunctions is isomorphic to Lambda(S^*(M_0)). Here G is the Lie supergroup associated with a certain extension of the Lie algebra of symmetry g_0 to an algebra of supersymmetry g=g_0+g_1=g_0+S via the Kostant-Koszul construction. Each algebra of supersymmetry naturally determines a flat connection nabla^{S} in the spin bundle S(M_0). Killing vectors together with generalized Killing spinors (i.e. nabla^{S}-parallel spinors) are interpreted as the values of appropriate geometric symmetries of M, namely even and odd Killing fields. An explicit formula for the Killing representation of the algebra of supersymmetry is obtained, generalizing some results of Koszul. The generalized spin connection nabla^{S} defines a superconnection on M, via the super-version of a theorem of Wang.
Wagner, Anthony
-amino-5-phosphonovaleric acid (APV) infusions, whereas lateral perforant path plasticity can be attenuated by naloxone infusions. The present experiment was designed to evaluate the role of each entorhinal) changes in the overall configuration of environmental stimuli. Dorsal dentate gyrus infusions of either
Natural star-products on symplectic manifolds and related quantum mechanical operators
B?aszak, Maciej, E-mail: blaszakm@amu.edu.pl; Doma?ski, Ziemowit, E-mail: ziemowit@amu.edu.pl
2014-05-15
In this paper is considered a problem of defining natural star-products on symplectic manifolds, admissible for quantization of classical Hamiltonian systems. First, a construction of a star-product on a cotangent bundle to an Euclidean configuration space is given with the use of a sequence of pair-wise commuting vector fields. The connection with a covariant representation of such a star-product is also presented. Then, an extension of the construction to symplectic manifolds over flat and non-flat pseudo-Riemannian configuration spaces is discussed. Finally, a coordinate free construction of related quantum mechanical operators from Hilbert space over respective configuration space is presented. -- Highlights: •Invariant representations of natural star-products on symplectic manifolds are considered. •Star-products induced by flat and non-flat connections are investigated. •Operator representations in Hilbert space of considered star-algebras are constructed.
IS-321-312-001 TEP-to-HTEP manifold interface sheet
Willms, R Scott; Carlson, Bryan J; Coons, James E; Kubic, William L
2008-01-01
The Tokamak Exhaust Processing System (TEP) receives hydrogen-like and air-like gas streams from the High Tritium Exhaust Processing (HTEP) manifold. Gases from the torus roughing pump are pumped into the HTEP manifold before entering TEP. This interface sheet describes the TEP-HTEP material stream interface, both the physical elements that make up the interface as well as the gas streams that will flow through the interface. The functions of this interface are to: Provide a physical connection for the transport of hydrogen-like and air-like gases from the HTEP manifold to TEP. Provide seals to prevent the unncessary release of tritium to the surrounding environment. Provide valves that can be actuated to stop or prevent the flow of gas into TEP.
Weyl Tensor Classification in Four-dimensional Manifolds of All Signatures
Carlos Batista
2013-02-07
It is well known that the classification of the Weyl tensor in Lorentzian manifolds of dimension four, the so called Petrov classification, was a great tool to the development of general relativity. Using the bivector approach it is shown in this article a classification for the Weyl tensor in all four-dimensional manifolds, including all signatures and the complex case, in an unified and simple way. The important Petrov classification then emerges just as a particular case in this scheme. The boost weight classification is also extended here to all signatures as well to complex manifolds. For the Weyl tensor in four dimensions it is established that this last approach produces a classification equivalent to the one generated by the bivector method.
5D Super Yang-Mills on $Y^{p,q}$ Sasaki-Einstein manifolds
Jian Qiu; Maxim Zabzine
2015-02-27
On any simply connected Sasaki-Einstein five dimensional manifold one can construct a super Yang-Mills theory which preserves at least two supersymmetries. We study the special case of toric Sasaki-Einstein manifolds known as $Y^{p,q}$ manifolds. We use the localisation technique to compute the full perturbative part of the partition function. The full equivariant result is expressed in terms of certain special function which appears to be a curious generalisation of the triple sine function. As an application of our general result we study the large $N$ behaviour for the case of single hypermultiplet in adjoint representation and we derive the $N^3$-behaviour in this case.
An integral manifold approach to reduced order dynamic modeling of synchronous machines
Sauer, P.W.; Ahmed-Zaid, S.; Kokotovic, P.V.
1988-02-01
The concept of integral manifolds is used to systematically create improved reduced order models of synchronous machines. The approach is illustrated through a detailed example of a single machine connected to an infinite bus. The example shows the advantages of the manifold approach and also clarifies several issues about reduced order models of synchronous machines. The basic objective of the method is to include the effects of more complex models without actually including the additional differential equations. This is illustrated by including the effects of stator transients and damper windings on the swing equation without including the differential equations.
Kahler Potential for M-theory on a G_2 Manifold
Andre Lukas; Stephen Morris
2003-11-21
We compute the moduli Kahler potential for M-theory on a compact manifold of G_2 holonomy in a large radius approximation. Our method relies on an explicit G_2 structure with small torsion, its periods and the calculation of the approximate volume of the manifold. As a verification of our result, some of the components of the Kahler metric are computed directly by integration over harmonic forms. We also discuss the modification of our result in the presence of co-dimension four singularities and derive the gauge-kinetic functions for the massless gauge fields that arise in this case.
A new approach for magnetic curves in 3D Riemannian manifolds
Bozkurt, Zehra Gök, Ismail Yayl?, Yusuf Ekmekci, F. Nejat
2014-05-15
A magnetic field is defined by the property that its divergence is zero in a three-dimensional oriented Riemannian manifold. Each magnetic field generates a magnetic flow whose trajectories are curves called as magnetic curves. In this paper, we give a new variational approach to study the magnetic flow associated with the Killing magnetic field in a three-dimensional oriented Riemann manifold, (M{sup 3}, g). And then, we investigate the trajectories of the magnetic fields called as N-magnetic and B-magnetic curves.
Pompano subsea development: Template/manifold, tree and ROV intervention systems
Beckmann, M.M.; Byrd, M.L.; Holt, J.; Riley, J.W.; Snell, C.K.; Tyer, C.; Brewster, D.
1996-12-31
BP Exploration`s Pompano Subsea Development, in 1,865 ft of water in the Gulf of Mexico, uses a subsea production system to produce oil to a host platform 4{1/2} miles away. The 10-slot subsea template/manifold supports Through FlowLine (TFL) wells, which are controlled by means of an electrohydraulic control system. All process components of the system are retrievable with ROV intervention. This paper describes the template/manifold system, TFL tree system and ROV intervention systems.
Marco Ghimenti; Anna Maria Micheletti
2014-01-21
Given a 3-dimensional Riemannian manifold (M,g), we investigate the existence of positive solutions of the nonlinear Klein-Gordon-Maxwell system and nonlinear Schroedinger-Maxwell system with subcritical nonlinearity. We prove that the number of one peak solutions depends on the topological properties of the manifold M, by means of the Lusternik Schnirelmann category.
Wisconsin at Madison, University of
Multivariate General Linear Models (MGLM) on Riemannian Manifolds with Applications to Statistical range of such methods by deriv- ing schemes for multivariate multiple linear regression -- a manifold ] , ^ = Ży - ^Żx. (2) If x and y are multivariates, one can easily replace the mul- tiplication and division
Needell, Deanna
CS Applications CS Math MR Applications MR Math MR Theory Proof Bridging Matrix Recovery Gaps using #12;CS Applications CS Math MR Applications MR Math MR Theory Proof Outline Compressed Sensing (CS manifold theory Deanna Needell Bridging Matrix Recovery Gaps using Manifolds #12;CS Applications CS Math MR
Harmonic Exponential Families on Manifolds Taco S. Cohen T.S.COHEN@UVA.NL
Welling, Max
Harmonic Exponential Families on Manifolds Taco S. Cohen T.S.COHEN@UVA.NL University of Amsterdam applications to Bayesian cam- era motion estimation (where harmonic exponen- tial families serve as conjugate experimental re- sults show that harmonic densities yield a signif- icantly higher likelihood than the best
Symmetry operators for Dirac's equation on two-dimensional spin manifolds
Lorenzo Fatibene; Raymond G. McLenaghan; Giovanni Rastelli; Shane N. Smith
2008-12-17
It is shown that the second order symmetry operators for the Dirac equation on a general two-dimensional spin manifold may be expressed in terms of Killing vectors and valence two Killing tensors. The role of these operators in the theory of separation of variables for the Dirac equation is studied.
Krysl, Svatopluk
C -algebras Oscillator or Segal-Shale-Weil representation Geometry: Associating the oscillator or Segal-Shale-Weil representation Geometry: Associating the oscillator to symplectic manifolds Global and (x) = 0 implies x = 0 2 S. KrĂ˝sl #12;C -algebras Oscillator or Segal-Shale-Weil representation
Minimal Riesz energy point configurations for rectifiable d-dimensional manifolds
Hardin, Doug
, these results are new. Key words: Minimal discrete Riesz energy, Best-packing, Hausdorff measure, Rectifiable best-packing, mini- mization of energy (e.g., Coulomb potentials), spherical t-designs (cubatureMinimal Riesz energy point configurations for rectifiable d-dimensional manifolds D.P. Hardin
Invariant Manifolds for the Station Keeping of Solar Sails Ariadna Farres, AJ
Boyer, Edmond
Invariant Manifolds for the Station Keeping of Solar Sails Ariadna Farr´es, AJ Universitat de 2 / 45 inria-00585612,version1-14Apr2011 #12;Background What is a Solar Sail ? Solar Sails are a new concept of spacecraft propulsion that takes ad- vantage of the Solar radiation pressure to propel
Hierarchical brain mapping via a generalized Dirichlet solution for mapping brain manifolds
Christensen, Gary E.
a coarse-to- ne approach for the transformation of digital anatomical textbooks from the ideal to the individual that uni es the work on landmark deformations and volume based transformation. The Hierarchical- manifolds. We follow the approach that the highest dimensional transformation is a result from the solution
IEEE TRANSACTIONS ON POWER SYSTEMS, CHEN, DENG AND HUO. 1 Electricity Price Curve Modeling by Manifold Learning Jie Chen, Student Member, IEEE, Shi-Jie Deng, Senior Member, IEEE, and Xiaoming Huo, Senior Member, IEEE Abstract-- This paper proposes a novel non-parametric ap- proach for the analysis
Learning Manifolds with K-Means and K-Flats Guille D. Canas ,
Poggio, Tomaso
geometry, but in a setting in which typically the manifold is a hyper-surface in a low-dimensional space (e study is broadly motivated by questions in high-dimensional learning. As is well known, learning in high such assumption is that the data distribution lies on, or is close to, a low-dimensional set embedded in a high
A Unified Kernel Regression for Diffusion Wavelets on Manifolds Detects Aging-Related
Chung, Moo K.
for constructing wavelets on manifolds using a complicated machinery employed in previous studies [6,7]. Although as a solution to penalized regressions, which significantly differ from our framework that does not have any] that projects the statistical results to a surface for interpretation. 2 Kernel Regression and Wavelets
Mechanics Systems on Para-Kaehlerian Manifolds of Constant J-Sectional Curvature
Mehmet Tekkoyun
2009-02-20
The goal of this paper is to present Euler-Lagrange and Hamiltonian equations on R2n which is a model of para-Kaehlerian manifolds of constant J-sectional curvature. In conclusion, some differential geometrical and physical results on the related mechanic systems have been given.
Machine Learning for Seismic Signal Processing: Seismic Phase Classification on a Manifold
Meyer, Francois
Machine Learning for Seismic Signal Processing: Seismic Phase Classification on a Manifold Juan--In this research, we consider the supervised learning problem of seismic phase classification. In seismology, knowledge of the seismic activity arrival time and phase leads to epicenter localization and surface
Multiple-Food Recognition Considering Co-occurrence Employing Manifold Ranking
Yanai, Keiji
Multiple-Food Recognition Considering Co-occurrence Employing Manifold Ranking Yuji Matsuda-y@mm.cs.uec.ac.jp, yanai@cs.uec.ac.jp Abstract In this paper, we propose a method to recog- nize food images which include multiple food items considering co-occurrence statistics of food items. The proposed method employs
On the classical geometry of embedded manifolds in terms of Nambu brackets
Joakim Arnlind; Jens Hoppe; Gerhard Huisken
2010-03-31
We prove that many aspects of the differential geometry of embedded Riemannian manifolds can be formulated in terms of a multi-linear algebraic structure on the space of smooth functions. In particular, we find algebraic expressions for Weingarten's formula, the Ricci curvature and the Codazzi-Mainardi equations.
Bounding the bending of a hyperbolic 3-manifold Martin Bridgeman and Richard D. Canary
Canary, Dick
, 2015 Abstract In this paper we obtain bounds on the total bending of the boundary of the convex coreBounding the bending of a hyperbolic 3-manifold Martin Bridgeman and Richard D. Canary April 19 the bending lamination. The bending lamination inherits a transverse measure which keeps track of how much
Bounding the bending of a hyperbolic 3manifold Martin Bridgeman and Richard D. Canary \\Lambda
Canary, Dick
September 29, 2002 Abstract In this paper we obtain bounds on the total bending of the boundaryBounding the bending of a hyperbolic 3Âmanifold Martin Bridgeman and Richard D. Canary \\Lambda, called the bending lamination. The bending lamination inherits a transverse measure which keeps track
Computing Lyapunov exponents on a Stiefel manifold by Thomas J. Bridges and Sebastian Reich
Reich, Sebastian
Computing Lyapunov exponents on a Stiefel manifold by Thomas J. Bridges and Sebastian Reich The problem of numerical computation of a few Lyapunov exponents of #12;nite-dimensional dynamical systems computes one, many or all Lyapunov exponents of a continuous dynamical system by time integration, discrete
Side branch absorber for exhaust manifold of two-stroke internal combustion engine
Harris, Ralph E. (San Antonio, TX); Broerman, III, Eugene L. (San Antonio, TX); Bourn, Gary D. (Laramie, WY)
2011-01-11
A method of improving scavenging operation of a two-stroke internal combustion engine. The exhaust pressure of the engine is analyzed to determine if there is a pulsation frequency. Acoustic modeling is used to design an absorber. An appropriately designed side branch absorber may be attached to the exhaust manifold.
ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING
Grizzle, Jessy W.
ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING in turbocharged gasoline engines with variable valve timing requires knowledge of exhaust mani- fold pressure, Pe strict emissions regulations. For turbocharged applica- tions, it has been shown [1] that knowledge
Integrability of D1-brane on Group Manifold with Mixed Three Form Flux
Kluson, J
2015-01-01
We consider D1-brane as a natural probe of the group manifold with mixed three form fluxes. We determine Lax connection for given theory. Then we switch to the canonical analysis and calculate the Poisson brackets between spatial components of Lax connections and we argue for integrability of given theory.
Pose Estimation via Gauss-Newton-on-manifold Pei Yean Lee and John B. Moore
Moore, John Barratt
on the smooth manifold of rotation matrices, namely the special orthogonal matrices SO3, depicted as the surface of a cone in Fig. 1. Also, in Fig. 1, the feasible domain is depicted as the intersection SO3 K. The cost
Kazhdan, Michael
Hierarchical Volumetric Multi-view Stereo Reconstruction of Manifold Surfaces based on Dual Graph://www.rwth-graphics.de Abstract This paper presents a new volumetric stereo algorithm to reconstruct the 3D shape of an arbitrary into the volumetric grid, which establishes a well defined relationship between the integrated photo
An experimental investigation of sand transport in inclined eccentric annuli
McClellan, John Christopher
1991-01-01
-liquid flow and gas-solid flow are so great that such literature is of little insight. It should be noted that horizontal drilling has been done with air/mist, as described by Yost40 in one of the first examples. Other inclined two-phase flow papers were... annulus. An annular flow model was designed, fabricated, and installed in the Drilling Fluids Research Laboratory, Petroleum Engineering, Texas ASM University, by the author. The model is capable of inclinations of 30 to 90 degrees (from the vertical...
Computing Constrained MinimumWidth Annuli of Point Sets \\Lambda
Utrecht, Universiteit
Research N.W.O, NSERC Canada and FCAR Quebec. We also thank the Bellairs Research Institute in Barbados
Flow regimes and heat transfer in vertical narrow annuli
Ulke, A.; Goldberg, I.
1993-11-01
In shell side boiling heat exchangers narrow crevices that are formed between the tubes and the tube support structure provide areas for local thermal-hydraulic conditions which differ significantly from bulk fluid conditions. Understanding of the processes of boiling and dryout in flow restricted crevices can help in designing of tube support geometries to minimize the likelihood of tube support plate and tube corrosion observed in commercial power plant steam generators. This paper describes a one dimensional thermal-hydraulic model of a vertical crevice between a tube and a support plate with cylindrical holes. The annulus formed by the support plate hole and an eccentrically located tube has been represented by vertical strips. The formation, growth and collapse of a steam bubble in each strip has been determined. Based on the bubble history, and flow regimes characterized by ``isolated`` bubbles, ``coalesced`` bubbles and liquid deficient regions have been defined.
McGregor, Douglas S. (Riley, KS); Shultis, John K. (Manhattan, KS); Rice, Blake B. (Manhattan, KS); McNeil, Walter J. (Winnfield, KS); Solomon, Clell J. (Wichita, KS); Patterson, Eric L. (Manhattan, KS); Bellinger, Steven L. (Manhattan, KS)
2010-12-21
Non-streaming high-efficiency perforated semiconductor neutron detectors, method of making same and measuring wands and detector modules utilizing same are disclosed. The detectors have improved mechanical structure, flattened angular detector responses, and reduced leakage current. A plurality of such detectors can be assembled into imaging arrays, and can be used for neutron radiography, remote neutron sensing, cold neutron imaging, SNM monitoring, and various other applications.
Spinorial description of $\\mathrm{SU}(3)$- and $G_2$-manifolds
Ilka Agricola; Simon G. Chiossi; Thomas Friedrich; Jos Höll
2015-09-16
We present a uniform description of $\\mathrm{SU}(3)$-structures in dimension $6$ as well as $G_2$-structures in dimension $7$ in terms of a characterising spinor and the spinorial field equations it satisfies. We apply the results to hypersurface theory to obtain new embedding theorems, and give a general recipe for building conical manifolds. The approach also enables one to subsume all variations of the notion of a Killing spinor.
Energy identity of approximate biharmonic maps to Riemannian manifolds and its application
Wang, Changyou
2011-01-01
We consider in dimension four weakly convergent sequences of approximate biharmonic maps to a Riemannian manifold with bi-tension fields bounded in $L^p$ for $p>\\frac43$. We prove an energy identity that accounts for the loss of hessian energies by the sum of hessian energies over finitely many nontrivial biharmonic maps on $\\mathbb R^4$. As a corollary, we obtain an energy identity for the heat flow of biharmonic maps at time infinity.
Quantization of a particle on a two-dimensional manifold of constant curvature
Bracken, Paul [Department of Mathematics, University of Texas, Edinburg, Texas 78540 (United States)
2014-10-15
The formulation of quantum mechanics on spaces of constant curvature is studied. It is shown how a transition from a classical system to the quantum case can be accomplished by the quantization of the Noether momenta. These can be determined by means of Lie differentiation of the metric which defines the manifold. For the metric examined here, it is found that the resulting Schrödinger equation is separable and the spectrum and eigenfunctions can be investigated in detail.
Kelley; Dana A. (New Milford, CT), Farooque; Mohammad (Danbury, CT), Davis; Keith (Southbury, CT)
2007-10-02
A fuel cell system with improved electrical isolation having a fuel cell stack with a positive potential end and a negative potential, a manifold for use in coupling gases to and from a face of the fuel cell stack, an electrical isolating assembly for electrically isolating the manifold from the stack, and a unit for adjusting an electrical potential of the manifold such as to impede the flow of electrolyte from the stack across the isolating assembly.
SO(10) Grand Unification in M theory on a G2 manifold
Bobby S. Acharya; Krzysztof Bozek; Miguel Crispim Romao; Stephen F. King; Chakrit Pongkitivanichkul
2015-02-05
We consider Grand Unified Theories based on $SO(10)$ which originate from string/$M$ theory on $G_2$ manifolds or Calabi-Yau spaces with discrete symmetries. In this framework we are naturally led to a novel solution of the doublet-triplet splitting problem previously considered by Dvali which involves an extra vector-like Standard Model family and light, but weakly coupled colour triplets. These additional states are predicted to be accessible at the LHC and also induce R-parity violation. Gauge coupling unification occurs with a larger GUT coupling.
SO(10) Grand Unification in M theory on a G2 manifold
Acharya, Bobby S; Romao, Miguel Crispim; King, Stephen F; Pongkitivanichkul, Chakrit
2015-01-01
We consider Grand Unified Theories based on $SO(10)$ which originate from string/$M$ theory on $G_2$ manifolds or Calabi-Yau spaces with discrete symmetries. In this framework we are naturally led to a novel solution of the doublet-triplet splitting problem previously considered by Dvali which involves an extra vector-like Standard Model family and light, but weakly coupled colour triplets. These additional states are predicted to be accessible at the LHC and also induce R-parity violation. Gauge coupling unification occurs with a larger GUT coupling.
Eigenvalues of Killing Tensors and Separable Webs on Riemannian and Pseudo-Riemannian Manifolds
Claudia Chanu; Giovanni Rastelli
2007-02-12
Given a $n$-dimensional Riemannian manifold of arbitrary signature, we illustrate an algebraic method for constructing the coordinate webs separating the geodesic Hamilton-Jacobi equation by means of the eigenvalues of $m \\leq n$ Killing two-tensors. Moreover, from the analysis of the eigenvalues, information about the possible symmetries of the web foliations arises. Three cases are examined: the orthogonal separation, the general separation, including non-orthogonal and isotropic coordinates, and the conformal separation, where Killing tensors are replaced by conformal Killing tensors. The method is illustrated by several examples and an application to the L-systems is provided.
Perforation patterned electrical interconnects
Frey, Jonathan
2014-01-28
This disclosure describes systems and methods for increasing the usable surface area of electrical contacts within a device, such as a thin film solid state device, through the implementation of electrically conductive interconnects. Embodiments described herein include the use of a plurality of electrically conductive interconnects that penetrate through a top contact layer, through one or more multiple layers, and into a bottom contact layer. The plurality of conductive interconnects may form horizontal and vertical cross-sectional patterns. The use of lasers to form the plurality of electrically conductive interconnects from reflowed layer material further aids in the manufacturing process of a device.
Falicoff, Waqidi; Chaves, Julio C.; Minano, Juan Carlos; Benitez, Pablo; Dross, Oliver; Parkyn, Jr., William A.
2010-02-23
Optical systems are described that have at least one source of a beam of blue light with divergence under 15.degree.. A phosphor emits yellow light when excited by the blue light. A collimator is disposed with the phosphor and forms a yellow beam with divergence under 15.degree.. A dichroic filter is positioned to transmit the beam of blue light to the phosphor and to reflect the beam of yellow light to an exit aperture. In different embodiments, the beams of blue and yellow light are incident upon said filter with central angles of 15.degree., 22.degree., and 45.degree.. The filter may reflect all of one polarization and part of the other polarization, and a polarization rotating retroreflector may then be provided to return the unreflected light to the filter.
Carmeline J. Dsilva; Ronen Talmon; Ronald R. Coifman; Ioannis G. Kevrekidis
2015-05-22
Nonlinear manifold learning algorithms, such as diffusion maps, have been fruitfully applied in recent years to the analysis of large and complex data sets. However, such algorithms still encounter challenges when faced with real data. One such challenge is the existence of "repeated eigendirections," which obscures the detection of the true dimensionality of the underlying manifold and arises when several embedding coordinates parametrize the same direction in the intrinsic geometry of the data set. We propose an algorithm, based on local linear regression, to automatically detect coordinates corresponding to repeated eigendirections. We construct a more parsimonious embedding using only the eigenvectors corresponding to unique eigendirections, and we show that this reduced diffusion maps embedding induces a metric which is equivalent to the standard diffusion distance. We first demonstrate the utility and flexibility of our approach on synthetic data sets. We then apply our algorithm to data collected from a stochastic model of cellular chemotaxis, where our approach for factoring out repeated eigendirections allows us to detect changes in dynamical behavior and the underlying intrinsic system dimensionality directly from data.
Global dynamics and inflationary center manifold and slow-roll approximants
Artur Alho; Claes Uggla
2015-01-15
We consider the familiar problem of a minimally coupled scalar field with quadratic potential in flat Friedmann-Lema\\^itre-Robertson-Walker cosmology to illustrate a number of techniques and tools, which can be applied to a wide range of scalar field potentials and problems in e.g. modified gravity. We present a global and regular dynamical systems description that yields a global understanding of the solution space, including asymptotic features. We introduce dynamical systems techniques such as center manifold expansions and use Pad\\'e approximants to obtain improved approximations for the `attractor solution' at early times. We also show that future asymptotic behavior is associated with a limit cycle, which shows that manifest self-similarity is asymptotically broken toward the future, and give approximate expressions for this behavior. We then combine these results to obtain global approximations for the attractor solution, which, e.g., might be used in the context of global measures. In addition we elucidate the connection between slow-roll based approximations and the attractor solution, and compare these approximations with the center manifold based approximants.
Thierry Daude; Damien Gobin; François Nicoleau
2015-01-15
In this paper, we adapt the well-known \\emph{local} uniqueness results of Borg-Marchenko type in the inverse problems for one dimensional Schr{\\"o}dinger equation to prove \\emph{local} uniqueness results in the setting of inverse \\emph{metric} problems. More specifically, we consider a class of spherically symmetric manifolds having two asymptotically hyperbolic ends and study the scattering properties of massless Dirac waves evolving on such manifolds. Using the spherical symmetry of the model, the stationary scattering is encoded by a countable family of one-dimensional Dirac equations. This allows us to define the corresponding transmission coefficients $T(\\lambda,n)$ and reflection coefficients $L(\\lambda,n)$ and $R(\\lambda,n)$ of a Dirac wave having a fixed energy $\\lambda$ and angular momentum $n$. For instance, the reflection coefficients $L(\\lambda,n)$ correspond to the scattering experiment in which a wave is sent from the \\emph{left} end in the remote past and measured in the same left end in the future. The main result of this paper is an inverse uniqueness result local in nature. Namely, we prove that for a fixed $\\lambda \
Scannell, Kevin Patrick
that compact oriented orthochronous 2 + 1 AdS spacetime with non-empty spacelike boundary S a product S × [0, 1] and embeds in a domain of dependence. Is it possible to construct a singular AdS manifold with more than two constant curvature spacetime. (3) (Schlenker) Let M be a compact AdS cone manifold with m singular curves
Pope, Christopher
Geometry and Group Theory ABSTRACT In this course, we develop the basic notions of Manifolds and Geometry, with applications in physics, and also we develop the basic notions of the theory of Lie Groups . . . . . . . . . . . . . . . . . . . . . 66 2 General Relativity; Einstein's Theory of Gravitation 73 2.1 The Equivalence Principle
Daraio, Chiara
expectation of laminar flow in electronic cooling, high flow rate and high fluid temperatures result in tur- bulent flow conditions in the inlet and outlet manifolds of the heat sink with predominantly laminar flow hot water as working fluid Chander Shekhar Sharma a , Manish K. Tiwari a , Bruno Michel b , Dimos
Lapeyre, Guillaume
Comment on ``Finding finite-time invariant manifolds in two-dimensional velocity fields'' Chaos 10 for transport and mixing in periodic and aperi- odic flows. For aperiodic two-dimensional flows, several the hyperbolic point. He further claims that this is generally sufficient to accurately identify the hyper- bolic
Wisconsin at Madison, University of
for constructing wavelets on manifolds using a complicated machinery employed in previous studies [6, 7]. Although as a solution to penalized regressions, which significantly differ from our framework that does not have any] that projects the statistical results to a surface for interpretation. 2 Kernel Regression and Wavelets
Fern, Xiaoli Zhang
of organization. Audio classification systems typically begin by extract- ing acoustic features from audio signalsAudio Classification of Bird Species: a Statistical Manifold Approach Forrest Briggs, Raviv Raich}@eecs.oregonstate.edu Abstract Our goal is to automatically identify which species of bird is present in an audio recording using
Pless, Robert
Manifold Learning for 4D CT Reconstruction of the Lung Manfred Georg*, Richard Souvenir, Andrew, Canada Andrew.Hope@rmp.uhn.on.ca Abstract Computed Tomography is used to create models of lung dynamics because it provides high contrast images of lung tissue. Creating 4D CT models which capture dynamics
$SO(10)$ Grand Unification from $M$ theory on a $G_2$ manifold
Miguel Crispim Romăo
2015-02-20
We consider Grand Unified Theories based on $SO(10)$ which originate from $M$ theory on $G_2$ manifolds. In this framework we are naturally led to a novel solution of the doublet-triplet splitting problem involving an extra $\\overline{{\\bf 16}}_X+{\\bf 16}_X$ vector-like pair by considering discrete symmetries of the extra dimensions and preserving unification. Since Wilson line breaking preserves the rank of the gauge group, the necessary $U(1)$ gauge breaking is generated from extra multiplets. The main prediction of the approach is the existence of light states with the quantum numbers of a $\\overline{{\\bf 16}}_X+{\\bf 16}_X$ vector-like pair which could show up in future LHC searches.
$SO(10)$ Grand Unification from $M$ theory on a $G_2$ manifold
Romăo, Miguel Crispim
2015-01-01
We consider Grand Unified Theories based on $SO(10)$ which originate from $M$ theory on $G_2$ manifolds. In this framework we are naturally led to a novel solution of the doublet-triplet splitting problem involving an extra $\\overline{{\\bf 16}}_X+{\\bf 16}_X$ vector-like pair by considering discrete symmetries of the extra dimensions and preserving unification. Since Wilson line breaking preserves the rank of the gauge group, the necessary $U(1)$ gauge breaking is generated from extra multiplets. The main prediction of the approach is the existence of light states with the quantum numbers of a $\\overline{{\\bf 16}}_X+{\\bf 16}_X$ vector-like pair which could show up in future LHC searches.
Solid oxide fuel cell having monolithic cross flow core and manifolding
Poeppel, R.B.; Dusek, J.T.
1983-10-12
This invention discloses a monolithic core construction having the flow passageways for the fuel and for the oxidant gases extended transverse to one another, whereby full face core manifolding can be achieved for these gases and their reaction products. The core construction provides that only anode material surround each fuel passageway and only cathode material surround each oxidant passageway, each anode and each cathode further sandwiching at spaced opposing sides electrolyte and interconnect materials to define electrolyte and interconnect walls. Webs of the cathode and anode material hold the electrolyte and interconnect walls spaced apart to define the flow passages. The composite anode and cathode wall structures are further alternately stacked on one another (with the separating electrolyte or interconnect material typically being a single common layer) whereby the fuel passageways and the oxidant passageways are disposed transverse to one another.
Numerical Computation of the Stable and Unstable Manifolds of Invariant Tori
Derin B. Wysham; James D. Meiss
2005-04-26
We develop an iterative technique for computing the unstable and stable eigenfunctions of the invariant tori of diffeomorphisms. Using the approach of Jorba, the linearized equations are rewritten as a generalized eigenvalue problem. Casting the system in this light allows us to take advantage of the speed of eigenvalue solvers and create an efficient method for finding the first order approximations to the invariant manifolds of the torus. We present a numerical scheme based on the power method that can be used to determine the behavior normal to such tori, and give some examples of the application of the method. We confirm the qualitative conclusions of the Melnikov calculations of Lomel\\'i and Meiss (2003) for a volume-preserving mapping.
Solid oxide fuel cell having monolithic cross flow core and manifolding
Poeppel, Roger B. (Glen Ellyn, IL); Dusek, Joseph T. (Downers Grove, IL)
1984-01-01
This invention discloses a monolithic core construction having the flow passageways for the fuel and for the oxidant gases extended transverse to one another, whereby full face core manifolding can be achieved for these gases and their reaction products. The core construction provides that only anode material surround each fuel passageway and only cathode material surround each oxidant passageway, each anode and each cathode further sandwiching at spaced opposing sides electrolyte and interconnect materials to define electrolyte and interconnect walls. Webs of the cathode and anode material hold the electrolyte and interconnect walls spaced apart to define the flow passages. The composite anode and cathode wall structures are further alternately stacked on one another (with the separating electrolyte or interconnect material typically being a single common layer) whereby the fuel passageway and the oxidant passageways are disposed transverse to one another.
Self-organized manifold learning and heuristic charting via adaptive metrics
Horvath, Denis; Brutovsky, Branislav
2014-01-01
Classical metric and non-metric multidimensional scaling (MDS) variants are widely known manifold learning (ML) methods which enable construction of low dimensional representation (projections) of high dimensional data inputs. However, their use is crucially limited to the cases when data are inherently reducible to low dimensionality. In general, drawbacks and limitations of these, as well as pure, MDS variants become more apparent when the exploration (learning) is exposed to the structured data of high intrinsic dimension. As we demonstrate on artificial and real-world datasets, the over-determination problem can be solved by means of the hybrid and multi-component discrete-continuous multi-modal optimization heuristics. Its remarkable feature is, that projections onto 2D are constructed simultaneously with the data categorization (classification) compensating in part for the loss of original input information. We observed, that the optimization module integrated with ML modeling, metric learning and categ...
Manifold, bus support and coupling arrangement for solid oxide fuel cells
Parry, G.W.
1988-04-21
Individual, tubular solid oxide fuel cells (SOFCs) are assembled into bundles called a module within a housing, with a plurality of modules arranged end-to-end in a linear, stacked configuration called a string. A common set of piping comprised of a suitable high temperature resistant material (1) provides fuel and air to each module housing, (2) serves as electrically conducting buses, and (3) provides structural support for a string of SOFC modules. Ceramic collars are used to connect fuel and air inlet piping to each of the electrodes in an SOFC module and provide (1) electrical insulation for the current carrying bus bars and gas manifolds, (2) damping for the fuel and air inlet piping, and (3) proper spacing between the fuel and air inlet piping to prevent contact between these tubes and possible damage to the SOFC. 11 figs.
P. M. Sutter; Tsunefumi Tanaka
2006-10-11
Although the observed universe appears to be geometrically flat, it could have one of 18 global topologies. A constant-time slice of the spacetime manifold could be a torus, Mobius strip, Klein bottle, or others. This global topology of the universe imposes boundary conditions on quantum fields and affects the vacuum energy density via Casimir effect. In a spacetime with such a nontrivial topology, the vacuum energy density is shifted from its value in a simply-connected spacetime. In this paper, the vacuum expectation value of the stress-energy tensor for a massless scalar field is calculated in all 17 multiply-connected, flat and homogeneous spacetimes with different global topologies. It is found that the vacuum energy density is lowered relative to the Minkowski vacuum level in all spacetimes and that the stress-energy tensor becomes position-dependent in spacetimes that involve reflections and rotations.
Flow Equations for Uplifting Half-Flat to Spin(7) Manifolds
Aalok Misra
2006-01-28
In this short supplement to [1], we discuss the uplift of half-flat six-folds to Spin(7) eight-folds by fibration of the former over a product of two intervals. We show that the same can be done in two ways - one, such that the required Spin(7) eight-fold is a double G_2 seven-fold fibration over an interval, the G_2 seven-fold itself being the half-flat six-fold fibered over the other interval, and second, by simply considering the fibration of the half-flat six-fold over a product of two intervals. The flow equations one gets are an obvious generalization of the Hitchin's flow equations (to obtain seven-folds of G_2 holonomy from half-flat six-folds [2]). We explicitly show the uplift of the Iwasawa using both methods, thereby proposing the form of the new Spin(7) metrics. We give a plausibility argument ruling out the uplift of the Iwasawa manifold to a Spin(7) eight fold at the "edge", using the second method. For $Spin(7)$ eight-folds of the type $X_7\\times S^1$, $X_7$ being a seven-fold of SU(3) structure, we motivate the possibility of including elliptic functions into the "shape deformation" functions of seven-folds of SU(3) structure of [1] via some connections between elliptic functions, the Heisenberg group, theta functions, the already known $D7$-brane metric [3] and hyper-K\\"{a}hler metrics obtained in twistor spaces by deformations of Atiyah-Hitchin manifolds by a Legendre transform in [4].
Gary D. Bourn; Ford A. Phillips; Ralph E. Harris
2005-12-01
This document provides results and conclusions for Task 15.0--Detailed Analysis of Air Balance & Conceptual Design of Improved Air Manifolds in the ''Technologies to Enhance the Operation of Existing Natural Gas Compression Infrastructure'' project. SwRI{reg_sign} is conducting this project for DOE in conjunction with Pipeline Research Council International, Gas Machinery Research Council, El Paso Pipeline, Cooper Compression, and Southern Star, under DOE contract number DE-FC26-02NT41646. The objective of Task 15.0 was to investigate the perceived imbalance in airflow between power cylinders in two-stroke integral compressor engines and develop solutions via manifold redesign. The overall project objective is to develop and substantiate methods for operating integral engine/compressors in gas pipeline service, which reduce fuel consumption, increase capacity, and enhance mechanical integrity.
Constructing vacuum spacetimes by generating manifolds of revolution around a curve
Vee-Liem Saw
2015-06-23
We develop a general perturbative analysis on vacuum spacetimes which can be constructed by generating manifolds of revolution around a curve, and apply it to the Schwarzschild metric. The following different perturbations are carried out separately: 1) Non-rotating 2-spheres are added along a plane curve slightly deviated from the "Schwarzschild line"; 2) General non-rotating topological 2-spheres are added along the "Schwarzschild line" 3) Slow-rotating 2-spheres are added along the "Schwarzschild line". For (1), we obtain the first order vacuum solution and show that no higher order solution exists. This linearised vacuum solution turns out however to be just a gauge transformation of the Schwarzschild metric. For (2), we solve the general linearised vacuum equations under several special cases. In particular, there exist linearised vacuum solutions with signature-changing metrics (though these do not correspond to adding topological 2-spheres). For (3), we find that the first order vacuum solution is equivalent to the slowly rotating Kerr metric. This is hence a much simpler and geometrically insightful derivation as compared to the gravitomagnetic one, where this rotating-shells construction is a direct manifestation of the frame-dragging phenomenon. We also show that the full Kerr however, cannot be obtained via adding rotating ellipsoids.
Quantization of the relativistic fluid in physical phase space on Kaehler manifolds
Holender, L.; Vancea, I. V. [Departamento de Fisica, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Cx. Postal 23851, 23890-000 Seropedica (Brazil); Santos, M. A. [Departamento de Fisica e Quimica, Universidade Federal do Espirito Santo (UFES), Avenida Fernando Ferarri S/N-Goiabeiras, 29060-900 Vitoria (Brazil)
2008-02-15
We discuss the quantization of a class of relativistic fluid models defined in terms of one real and two complex conjugate potentials with values on a Kaehler manifold, and parametrized by the Kaehler potential K(z,z) and a real number {lambda}. In the Hamiltonian formulation, the canonical conjugate momenta of the potentials are subjected to second-class constraints which allow us to apply the symplectic projector method in order to find the physical degrees of freedom and the physical Hamiltonian. We construct the quantum theory for that class of models by employing the canonical quantization methods. We also show that a semiclassical theory in which the Kaehler and the complex potentials are not quantized has a highly degenerate vacuum. We define and compute the quantum topological number (quantum linking number) operator which has nonvanishing contributions from the Kaehler and complex potentials only. Also, we show that the vacuum and the states formed by tensoring the number operators eigenstates have zero linking number, and show that linear combinations of the tensor product of number operators eigenstates which have the form of entangled states have nonzero linking number.
Dynamical Casimir Effect in a small compact manifold for the Maxwell vacuum
Ariel R. Zhitnitsky
2015-01-29
We study novel type of contributions to the partition function of the Maxwell system defined on a small compact manifold ${\\mathbb{M}}$ such as torus. These new terms can not be described in terms of the physical propagating photons with two transverse polarizations. Rather, these novel contributions emerge as a result of tunnelling events when transitions occur between topologically different but physically identical vacuum winding states. These new terms give an extra contribution to the Casimir pressure, yet to be measured. We argue that if the same system is considered in the background of a small external time-dependent magnetic field, than there will be emission of photons from the vacuum, similar to the Dynamical Casimir Effect (DCE) when real particles are radiated from the vacuum due to the time-dependent boundary conditions. The difference with conventional DCE is that the dynamics of the vacuum in our system is not related to the fluctuations of the conventional degrees of freedom, the virtual photons. Rather, the radiation in our case occurs as a result of tunnelling events between topologically different but physically identical $|k>$ sectors in a time -dependent background. We comment on relation of this novel effect with the well-known, experimentally observed, and theoretically understood phenomena of the persistent currents in normal metal rings. We also comment on possible cosmological applications of this effect.
The landscape of G-structures in eight-manifold compactifications of M-theory
Babalic, Elena Mirela
2015-01-01
We consider spaces of "virtual" constrained generalized Killing spinors, i.e. spaces of Majorana spinors which correspond to "off-shell" $s$-extended supersymmetry in compactifications of eleven-dimensional supergravity based on eight-manifolds $M$. Such spaces naturally induce two stratifications of $M$, called the chirality and stabilizer stratification. For the case $s=2$, we describe the former using the canonical Whitney stratification of a three-dimensional semi-algebraic set ${\\cal R}$. We also show that the stabilizer stratification coincides with the rank stratification of a cosmooth generalized distribution ${\\cal D}_0$ and describe it explicitly using the Whitney stratification of a four-dimensional semi-algebraic set $\\mathfrak{P}$. The stabilizer groups along the strata are isomorphic with $\\mathrm{SU}(2)$, $\\mathrm{SU}(3)$, $\\mathrm{G}_2$ or $\\mathrm{SU}(4)$, where $\\mathrm{SU(2)}$ corresponds to the open stratum, which is generically non-empty. We also determine the rank stratification of a lar...
The landscape of G-structures in eight-manifold compactifications of M-theory
Elena Mirela Babalic; Calin Iuliu Lazaroiu
2015-05-09
We consider spaces of "virtual" constrained generalized Killing spinors, i.e. spaces of Majorana spinors which correspond to "off-shell" $s$-extended supersymmetry in compactifications of eleven-dimensional supergravity based on eight-manifolds $M$. Such spaces naturally induce two stratifications of $M$, called the chirality and stabilizer stratification. For the case $s=2$, we describe the former using the canonical Whitney stratification of a three-dimensional semi-algebraic set ${\\cal R}$. We also show that the stabilizer stratification coincides with the rank stratification of a cosmooth generalized distribution ${\\cal D}_0$ and describe it explicitly using the Whitney stratification of a four-dimensional semi-algebraic set $\\mathfrak{P}$. The stabilizer groups along the strata are isomorphic with $\\mathrm{SU}(2)$, $\\mathrm{SU}(3)$, $\\mathrm{G}_2$ or $\\mathrm{SU}(4)$, where $\\mathrm{SU(2)}$ corresponds to the open stratum, which is generically non-empty. We also determine the rank stratification of a larger generalized distribution ${\\cal D}$ which turns out to be integrable in the case of compactifications down to $\\mathrm{AdS}_3$.
Space-Time as an Orderparameter Manifold in Random Networks and the Emergence of Physical Points
Manfred Requardt
1999-02-11
In the following we are going to describe how macroscopic space-time is supposed to emerge as an orderparameter manifold or superstructure floating in a stochastic discrete network structure. As in preceeding work (mentioned below), our analysis is based on the working philosophy that both physics and the corresponding mathematics have to be genuinely discrete on the primordial (Planck scale) level. This strategy is concretely implemented in the form of cellular networks and random graphs. One of our main themes is the development of the concept of physical (proto)points as densely entangled subcomplexes of the network and their respective web, establishing something like (proto)causality. It max perhaps be said that certain parts of our programme are realisations of some old and qualitative ideas of Menger and more recent ones sketched by Smolin a couple of years ago. We briefly indicate how this two-story-concept of space-time can be used to encode the (at least in our view) existing non-local aspects of quantum theory without violating macroscopic space-time causality!
Manifold, bus support and coupling arrangement for solid oxide fuel cells
Parry, Gareth W. (East Windsor, CT)
1989-01-01
Individual, tubular solid oxide fuel cells (SOFCs) are assembled into bundles called a module within a housing, with a plurality of modules arranged end-to-end in a linear, stacked configuration called a string. A common set of piping comprised of a suitable high temperture resistant material (1) provides fuel and air to each module housing, (2) serves as electrically conducting buses, and (3) provides structural support for a string of SOFC modules. The piping thus forms a manfold for directing fuel and air to each module in a string and makes electrical contact with the module's anode and cathode to conduct the DC power generated by the SOFC. The piping also provides structureal support for each individual module and maintains each string of modules as a structurally integral unit for ensuring high strength in a large 3-dimensional array of SOFC modules. Ceramic collars are used to connect fuel and air inlet piping to each of the electrodes in an SOFC module and provide (1) electrical insulation for the current carrying bus bars and gas manifolds, (2) damping for the fuel and air inlet piping, and (3) proper spacing between the fuel and air inlet piping to prevent contact between these tubes and possible damage to the SOFC.
Grant L. Hawkes; James E. O'Brien; Greg Tao
2011-11-01
A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created to model high-temperature electrolysis cell performance and steam electrolysis in an internally manifolded planar solid oxide electrolysis cell (SOEC) stack. This design is being evaluated at the Idaho National Laboratory for hydrogen production from nuclear power and process heat. Mass, momentum, energy, and species conservation and transport are provided via the core features of the commercial CFD code FLUENT. A solid-oxide fuel cell (SOFC) model adds the electrochemical reactions and loss mechanisms and computation of the electric field throughout the cell. The FLUENT SOFC user-defined subroutine was modified for this work to allow for operation in the SOEC mode. Model results provide detailed profiles of temperature, operating potential, steam-electrode gas composition, oxygen-electrode gas composition, current density and hydrogen production over a range of stack operating conditions. Single-cell and five-cell results will be presented. Flow distribution through both models is discussed. Flow enters from the bottom, distributes through the inlet plenum, flows across the cells, gathers in the outlet plenum and flows downward making an upside-down ''U'' shaped flow pattern. Flow and concentration variations exist downstream of the inlet holes. Predicted mean outlet hydrogen and steam concentrations vary linearly with current density, as expected. Effects of variations in operating temperature, gas flow rate, oxygen-electrode and steam-electrode current density, and contact resistance from the base case are presented. Contour plots of local electrolyte temperature, current density, and Nernst potential indicate the effects of heat transfer, reaction cooling/heating, and change in local gas composition. Results are discussed for using this design in the electrolysis mode. Discussion of thermal neutral voltage, enthalpy of reaction, hydrogen production, cell thermal efficiency, cell electrical efficiency, and Gibbs free energy are discussed and reported herein.
Thomas Laetsch
2013-05-17
This paper gives a rigorous interpretation of a Feynman path integral on a Riemannian manifold M with non-positive sectional curvature. A $L^2$ Riemannian metric $G_P$ is given on the space of piecewise geodesic paths $H_P(M)$ adapted to the partition $P$ of $[0,1]$, whence a finite-dimensional approximation of Wiener measure is developed. It is proved that, as $mesh(P) \\to 0$, the approximate Wiener measure converges in a $L^1$ sense to the measure $e^{-\\frac{2 + \\sqrt{3}}{20\\sqrt{3}} \\int_0^1 Scal(\\sigma(s)) ds} d\
Ohbuchi, Ryutarou
Takahiko Furuya and Ryutarou Ohbuchi, Diffusion-on-Manifold Aggregation of Local Features for Shape-based 3D Model Retrieval, accepted as oral paper, Proc. ACM International Conference on Multimedia Information Retrieval (ICMR) 2015, Shanghai, China. 1 Diffusion-on-Manifold Aggregation of Local Features
Fine, Dana S.; Sawin, Stephen
2014-06-15
Following Feynman's prescription for constructing a path integral representation of the propagator of a quantum theory, a short-time approximation to the propagator for imaginary-time, N = 1 supersymmetric quantum mechanics on a compact, even-dimensional Riemannian manifold is constructed. The path integral is interpreted as the limit of products, determined by a partition of a finite time interval, of this approximate propagator. The limit under refinements of the partition is shown to converge uniformly to the heat kernel for the Laplace-de Rham operator on forms. A version of the steepest descent approximation to the path integral is obtained, and shown to give the expected short-time behavior of the supertrace of the heat kernel.
Bershtein, Mikhail; Ronzani, Massimiliano; Tanzini, Alessandro
2015-01-01
We provide a contour integral formula for the exact partition function of ${\\cal N}=2$ super-symmetric $U(N)$ gauge theories on compact toric four-manifolds by means of supersymmetric localisation. We perform the explicit evaluation of the contour integral for $U(2)$ ${\\cal N}=2$ theory on $\\mathbb{P}^2$ for all instanton numbers. In the zero mass case, corresponding to the ${\\cal N}=4$ supersymmetric gauge theory, we obtain the generating function of the Euler characteristics of instanton moduli spaces in terms of quasi-modular forms. In the decoupling limit of infinite mass we find that the generating function of local and surface observables computes equivariant Donaldson invariants, thus proving in this case a long-standing conjecture by N. Nekrasov. In the case of vanishing first Chern class the resulting equivariant Donaldson polynomials are new.
Colbert, John Wesley
1993-01-01
GEOMETRY Inclination (angle from vertical) Annular Dimensions Rotary Speed Drill Pipe Eccentricity t Variable Drillpipe O. D, - 1. 13 inches Hole I. D ? 2. 0 inches Ok 50rpm 75 % DRILLING FLUID Fluid Annular Velocity Flow Regime Density Water... then there will be adequate cuttings removal. However, for deviated wellbores the cuttings slip velocity is no longer parallel to the direction of flow, but as the angle of inclination (from the vertical) increases, the component of the gravitational force normal...
Benchmark Evaluation of Uranium Metal Annuli and Cylinders with Beryllium Reflectors
John D. Bess
2010-06-01
An extensive series of delayed critical experiments were performed at the Oak Ridge Critical Experiments Facility using enriched uranium metal during the 1960s and 1970s in support of criticality safety operations at the Y-12 Plant. These experiments were designed to evaluate the storage, casting, and handling limits of the Y-12 Plant and to provide data for the verification of cross sections and calculation methods utilized in nuclear criticality safety applications. Many of these experiments have already been evaluated and included in the International Criticality Safety Benchmark Evaluation Project (ICSBEP) Handbook: unreflected (HEU-MET-FAST-051), graphite-reflected (HEU-MET-FAST-071), and polyethylene-reflected (HEU-MET-FAST-076). Three of the experiments consisted of highly-enriched uranium (HEU, ~93.2% 235U) metal parts reflected by beryllium metal discs. The first evaluated experiment was constructed from a stack of 7-in.-diameter, 4-1/8-in.-high stack of HEU discs top-reflected by a 7-in.-diameter, 5-9/16-in.-high stack of beryllium discs. The other two experiments were formed from stacks of concentric HEU metal annular rings surrounding a 7-in.diameter beryllium core. The nominal outer diameters were 13 and 15 in. with a nominal stack height of 5 and 4 in., respectively. These experiments have been evaluated for inclusion in the ICSBEP Handbook.
Turning Moment of Rotating Inner Cylinder in the Entry Region of Concentric Annuli*
Al-Qahtani, Mohammad
rotary n~achines,the study of this type of flow can assist in estimating the performance of such machines for compact rotary heat exchangers and combus- tion chambers. These possible future applicatio~is depend forces cause the fluid to be moved radially * Received 1st June, 1995. ** Mechanical Engineering
Not Available
1991-09-01
The design of a CGMCFC electric generation plant that will provide a cost of eletricity (COE) which is lower than that of current electric generation technologies and which is competitive with other long-range electric generating systems is presented. This effort is based upon the Internal Manifold Heat Exchanger (IMHEX) technology as developed by the Institute of Gas Technology (IGT). The project was executed by selecting economic and performance objectives for alternative plant arrangements while considering process constraints identified during IMHEX fuel cell development activities at ICT. The four major subsystems of a coal-based MCFC power plant are coal gasification, gas purification, fuel cell power generation and the bottoming cycle. The design and method of operation of each subsystem can be varied, and, depending upon design choices, can have major impact on both the design of other subsystems and the resulting cost of electricity. The challenge of this project was to select, from a range of design parameters, those operating conditions that result in a preferred plant design. Computer modelling was thus used to perform sensitivity analyses of as many system variables as program resources and schedules would permit. In any systems analysis, it is imperative that the evaluation methodology be verifiable and comparable. The TAG Class I develops comparable (if imprecise) data on performance and costs for the alternative cases being studied. It identifies, from a range of options, those which merit more exacting scrutiny to be undertaken at the second level, TAG class II analysis.
AHF: Array-Based Half-Facet Data Structure for Mixed-Dimensional and Non-Manifold Meshes
Dyedov, Volodymyr; Ray, Navamita; Einstein, Daniel R.; Jiao, Xiangmin; Tautges, T.
2014-08-31
We present an Array-based Half-Facet mesh data structure, or AHF, for efficient mesh query and modification operations. The AHF extends the compact array-based half-edge and half-face data structures (T.J. Alumbaugh and X. Jiao, Compact array-based mesh data structures, IMR, 2005) to support mixed-dimensional and non-manifold meshes. The design goals of our data structure include generality to support such meshes, efficiency of neighborhood queries and mesh modification, compactness of memory footprint, and facilitation of interoperability of mesh-based application codes. To accomplish these goals, our data structure uses sibling half-facets as a core abstraction, coupled with other explicit and implicit representations of entities. A unique feature of our data structure is a comprehensive implementation in MATLAB, which allows rapid prototyping, debugging, testing, and deployment of meshing algorithms and other mesh-based numerical methods. We have also developed C++ implementation built on top of MOAB (T.J. Tautges, R. Meyers, and K. Merkley, MOAB: A Mesh-Oriented Database, Sandia National Laboratories, 2004). We present some comparisons of the memory requirements and computational costs, and also demonstrate its effectiveness with a few sample applications.
Light field appearance manifolds
Christoudias, Chris Mario, 1980-
2004-01-01
Statistical shape and texture appearance models are powerful image representations, but previously had been restricted to 2D or 3D shapes with smooth surfaces and lambertian reflectance. In this thesis we present a novel ...
Sergey P. Kuznetsov
2015-10-13
Dynamical equations are formulated and a numerical study is provided for self-oscillatory model systems based on the triple linkage hinge mechanism of Thurston -- Weeks -- Hunt -- MacKay. We consider systems with holonomic mechanical constraint of three rotators as well as systems, where three rotators interact by potential forces. We present and discuss some quantitative characteristics of the chaotic regimes (Lyapunov exponents, power spectrum). Chaotic dynamics of the models we consider are associated with hyperbolic attractors, at least, at relatively small supercriticality of the self-oscillating modes; that follows from numerical analysis of the distribution for angles of intersection of stable and unstable manifolds of phase trajectories on the attractors. In systems based on rotators with interacting potential the hyperbolicity is violated starting from a certain level of excitation.
Probabilistic and Statistical Analysis of Perforated Patterns
Misailovic, Sasa
2011-01-19
We present a new foundation for the analysis and transformation of computer programs.Standard approaches involve the use of logical reasoning to prove that the applied transformation does not change the observable semantics ...
Balajewicz, Maciej; Dowell, Earl
2015-01-01
For a projection-based reduced order model (ROM) to be stable and accurate, the dynamics of the truncated subspace must be taken into account. This paper proposes an approach for stabilizing and enhancing projection-based fluid ROMs in which truncated modes are accounted for \\textit{a priori} via a minimal rotation of the projection subspace. Attention is focused on the full non-linear compressible Navier-Stokes equations in specific volume form as a step toward a more general formulation for problems with generic non-linearities. Unlike traditional approaches, no empirical turbulence modeling terms are required, and consistency between the ROM and the full order model from which the ROM is derived is maintained. Mathematically, the approach is formulated as a quadratic matrix program on the Stiefel manifold. The reproductive as well as predictive capabilities of the method are evaluated on several compressible flow problems, including a problem involving laminar flow over an airfoil with a high angle of atta...
Not Available
1991-09-01
The design of a CGMCFC electric generation plant that will provide a cost of eletricity (COE) which is lower than that of current electric generation technologies and which is competitive with other long-range electric generating systems is presented. This effort is based upon the Internal Manifold Heat Exchanger (IMHEX) technology as developed by the Institute of Gas Technology (IGT). The project was executed by selecting economic and performance objectives for alternative plant arrangements while considering process constraints identified during IMHEX fuel cell development activities at ICT. The four major subsystems of a coal-based MCFC power plant are coal gasification, gas purification, fuel cell power generation and the bottoming cycle. The design and method of operation of each subsystem can be varied, and, depending upon design choices, can have major impact on both the design of other subsystems and the resulting cost of electricity. The challenge of this project was to select, from a range of design parameters, those operating conditions that result in a preferred plant design. Computer modelling was thus used to perform sensitivity analyses of as many system variables as program resources and schedules would permit. In any systems analysis, it is imperative that the evaluation methodology be verifiable and comparable. The TAG Class I develops comparable (if imprecise) data on performance and costs for the alternative cases being studied. It identifies, from a range of options, those which merit more exacting scrutiny to be undertaken at the second level, TAG class II analysis.
Controlled Rough Paths on Manifolds
Semko, Jeremy
2015-01-01
23] L. C. Young, An inequality of H¨older type connectedI. An extension of an inequality of L. C. Young, Math. Res.now that p Inequality (see [23]) along with an
Simplicial isotopies in 3-manifolds
O'Donnell, Daniel Francis
1974-01-01
(Z), and (2) n(T2) & 26. Analogously, a triangulation I of 2 1 Bd(C ) can be found satisfying these same conditions. A triangulation T is defined so that if s is a 3-simplex of T, then s is of the form plw for w c I)2, or of the form s. w, 1 where s. is a... i a locally fi ite collection or r-simplexes (r = O, . . . , p) so that (1) if two of the simplexes have a point in common, their intersection is a j-simplex, where 0 & j & p ? 1, and (2) the union of T is N. We let n(T ) = Card T , where...
Finsler manifolds with general symmetries
Latifi, Dariush
2012-01-01
In this paper, we study generalized symmetric Finsler spaces. We first study symmetry preserving diffeomorphisms, then we show that the group of symmetry preserving diffeomorphisms is a transitive Lie transformation group. Finally we give some existence theorems.
Efficiency of perforated breakwater and associated energy dissipation
Ariyarathne, Hanchapola Appuhamilage
2008-10-10
generator is a Sea Sim Rolling Seal absorbing Wave maker (RSW 90- 85), a dry back, aluminium space frame, and PVC cased, modular, hinged flap wave maker. The flap is sealed by a low friction rolling seal and is driven by a precision, electronically...
Efficiency of perforated breakwater and associated energy dissipation
Ariyarathne, Hanchapola Appuhamilage
2009-05-15
generator is a Sea Sim Rolling Seal absorbing Wave maker (RSW 90- 85), a dry back, aluminium space frame, and PVC cased, modular, hinged flap wave maker. The flap is sealed by a low friction rolling seal and is driven by a precision, electronically...
Strongly Perforated K0-Groups of Simple C ?-Algebras
0 ? Coker b1?? ? K?A ? Ker b? ? 0. In particular, if .... (where xi,j is a point in Xi,j to be specified and 1dim(pj ) is the unit of theCj ?Mdim(pj )) and ?i,j(a) = a ...
Efficiently log and perforate 60 + wells with coiled tubing
Fertl, W.H.; Hotz, R.F.
1987-07-01
In today's petroleum industry, more and more emphasis is being placed on logging and completion techniques for highly deviated (extended-reach) and horizontal boreholes. This is the result of cost-effective development of oil and gas via: a minimum number of production platforms on large structures, incremental but marginal reserves in outlying and/or small fault blocks, shallow reservoirs in deep offshore waters, and significant hydrocarbon accumulations in environmentally sensitive and/or restrictive areas, e.g., perma-frost, urban areas, etc. The major challenge in logging such high-angle, extended-reach, and also horizontal boreholes is guiding the logging tool string to the bottom of the wellbore. In the horizontal portion of a borehole, the use of coiled tubing has proven successful in ''pushing'' the logging instrumentation toward the bottom (end) of the borehole.
The learnability of abstract syntactic principles Amy Perfors a,
Regier, Terry
: Received 30 June 2010 Accepted 1 November 2010 Available online 24 December 2010 Keywords: Poverty structures. In outline form, this is one version of the ``Poverty of the Stimulus'' (or PoS) argument
lnl'ornlad'lnc uissunce ef intelligence, perfor-
Meyer, Bertrand
Sauteur0 54 Un pari gagne : I'informatisation du PMU, ! par Guillaume Sebarine La specification : un
Bloch states, universality in light transport through a perforated metal
Gevorkian, Zh S; Cuevas, Emilio
2015-01-01
Light transport in a metal with hole arrays is considered.Analytical expressions for a normal incident lights transmission coefficient in a metallic system with periodic, isolated and disordered holes are obtained and analyzed. Special attention is paid to the phenomenon of an extraordinary transmittance. It was proven that a sufficient condition for such extraordinary behavior is a long-range order in the dielectric permittivity profile. Based on the extended Bloch states model a ladder structure and universal behavior for a transmission spectra is predicted. The resonance wavelength of a transmission spectra is found for the Kronig-Penney model. The role of surface plasmons is discussed.
Managing performance vs. accuracy trade-offs with loop perforation
Sidiroglou, Stelios
Many modern computations (such as video and audio encoders, Monte Carlo simulations, and machine learning algorithms) are designed to trade off accuracy in return for increased performance. To date, such computations ...
Cottle, John Ernest
1948-01-01
&opere poser t-t vari, bio "ransformr. i oo t'. t t!ie ! o-t oii-'? it to ! h liquiu could bo adeustod. "'nis rran, cmont per&aitted t. '. o, . inc. &&ance of t. '. e li&;uid temp rature t iCG P plus or minus 0, 1 P. all liquid aial air temperatures of tlic... without bio"!in, the liquid out of the ma&master and the connections available leaked. Since the plate pressure drop was unimportant ~?ay~, tne manometer was ab ndoned after the first fow r&&ns were mode. In a commercial oolumn r&here liquid...
COMPLEX HYPERBOLIC MANIFOLDS HOMOTOPY EQUIVALENT TO
Goldman, William
Institute, the Sonderforschungsbereich 256 in Bonn and the VolkswagenStiftung (ResearchinPairs program
Spin(7) holonomy manifold and Superconnection
Yasui, Y; Yasui, Yukinori; Ootsuka, Takayoshi
2001-01-01
We discuss the higher dimensional generalization of gravitational instantons by using volume-preserving vector fields. We give special attention to the case of 8-dimensions and present a new construction of the Ricci flat metric with holonomy in Spin(7). An example of the metric is explicitly given. Further it is shown that our formulation has a natural interpretation in the Chern-Simons theory written by the language of superconnections.
Spin(7) holonomy manifold and Superconnection
Yukinori Yasui; Takayoshi Ootsuka
2000-10-09
We discuss the higher dimensional generalization of gravitational instantons by using volume-preserving vector fields. We give special attention to the case of 8-dimensions and present a new construction of the Ricci flat metric with holonomy in Spin(7). An example of the metric is explicitly given. Further it is shown that our formulation has a natural interpretation in the Chern-Simons theory written by the language of superconnections.
Dark energy and 3-manifold topology
Torsten Asselmeyer-Maluga; Helge Rose
2007-11-21
We show that the differential-geometric description of matter by differential structures of spacetime leads to a unifying model of the three types of energy in the cosmos: matter, dark matter and dark energy. Using this model we are able to calculate the ratio of dark energy to the total energy of the cosmos.
Manifold free multiple sheet superplastic forming
Elmer, John W. (Danville, CA); Bridges, Robert L. (Knoxville, TN)
2001-01-01
Fluid-forming compositions in a container attached to enclosed adjacent sheets are heated to relatively high temperatures to generate fluids (gases) that effect inflation of the sheets. Fluid rates to the enclosed space between the sheets can be regulated by the canal from the container. Inflated articles can be produced by a continuous, rather than batch-type, process.
Manifold free multiple sheet superplastic forming
Elmer, John W.; Bridges, Robert L.
2004-01-13
Fluid-forming compositions in a container attached to enclosed adjacent sheets are heated to relatively high temperatures to generate fluids (gases) that effect inflation of the sheets. Fluid rates to the enclosed space between the sheets can be regulated by the canal from the container. Inflated articles can be produced by a continuous, rather than batch-type, process.
Trace anomaly on a quantum spacetime manifold
Spallucci, Euro; Smailagic, Anais; Nicolini, Piero
2006-04-15
In this paper we investigate the trace anomaly in a space-time where single events are delocalized as a consequence of short distance quantum coordinate fluctuations. We obtain a modified form of heat kernel asymptotic expansion which does not suffer from short distance divergences. Calculation of the trace anomaly is performed using an IR regulator in order to circumvent the absence of UV infinities. The explicit form of the trace anomaly is presented and the corresponding 2D Polyakov effective action and energy-momentum tensor are obtained. The vacuum expectation value of the energy-momentum tensor in the Boulware, Hartle-Hawking and Unruh vacua is explicitly calculated in a rt section of a recently found, noncommutative inspired, Schwarzschild-like solution of the Einstein equations. The standard short distance divergences in the vacuum expectation values are regularized in agreement with the absence of UV infinities removed by quantum coordinate fluctuations.
A Dark Energy Model in Lyra Manifold
Hoavo Hova
2012-04-11
We consider, in normal-gauge Lyra's geometry, evolution of a homogeneous isotropic universe in a gravitational model involving only the standard matter in interaction with a displacement vector field $\\phi_{\\mu}$. Considering both constant and time-dependent displacement vector field we show that the observed cosmic acceleration could be explained without considering an alien energy component with a negative pressure.
A Dark Energy Model in Lyra Manifold
Hova, Hoavo
2012-01-01
We consider, in normal-gauge Lyra's geometry, evolution of a homogeneous isotropic universe in a gravitational model involving only the standard matter in interaction with a displacement vector field $\\phi_{\\mu}$. Considering both constant and time-dependent displacement vector field we show that the observed cosmic acceleration could be explained without considering an alien energy component with a negative pressure.
LARGE RIEMANNIAN MANIFOLDS WHICH FLEXIBLE DRANISHNIKO STEVEN
Weinberger, Shmuel
integr degr ee,r espectively). See §4 for definitions elabor ations. Her e ar e our mainr Theorem give n
Nonparametric Bayesian Methods for Manifold Analysis
Maggioni, Mauro
Engineering Department Duke University Durham, NC lcarin@ece.duke.edu Co-conspirators: John Paisley, Mingyuan
Modular manifold for integrated fluidics and electronics
Adkins, Douglas Ray (Albuquerque, NM)
2010-03-30
An airtight preconcentrator housing and/or a sensor housing for chemical testing, the housing(s) comprising internal dimensions such that a pre-manufactured preconcentrator and/or sensor can be disposed therein. The housings can also comprise electrical contacts disposed therein which align with and thus provide electrical connection to the preconcentrator and/or sensor. The preconcentrator and/or sensor can be easily and quickly replaced.
DIRECT SEARCH ALGORITHMS OVER RIEMANNIAN MANIFOLDS ...
2007-01-08
an element ? ? TŻpM such that the geodesic ?pn+1 Żp(?) . = ExpŻp(??) ..... of the points p1,...,pm ? G(n, k) [2, 11]. A point p ...... Optimization, 9:112–147, 1998.
2 L -torsion of hyperbolic manifolds
Schick, Thomas
Thomas Schick to appear in Manuscripta Mathematica Eckehard Hess Thomas Schick Fachbereich Mathematik Fachbereich Mathematik Universit"at Mainz 48149 M"unster, Germany hess@topologie.mathematik.uni-mainz.dethomas.schick
OpenEI Community - Subsea Manifolds
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII JumpQuarterly Smart Grid Data available for download on OpenEIgoes
OpenEI Community - Subsea Manifolds Market
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII JumpQuarterly Smart Grid Data available for download on OpenEIgoes
Design and Transient Analysis of Passive Safety Cooling Systems for Advanced Nuclear Reactors
Galvez, Cristhian
2011-01-01
electric heaters, jet pumps, turbines, separators, annuli, pressurizers, accumulators, and power control system components. In addition, special process models
Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers
Abdulsattar, Suhaeb S
2014-05-03
than the randomly generated debris bed on the sump strainer of the NPP. The U.S. NRC began their analysis in 1996 in order to predict and estimate the loss of the Net Positive Suction Head (NPSH) by establishing GSI-191. In 1995, NUREG/CR-6224....0964 ft3 (0.00273 m3). The density of the NUKON debris particle was specified to be equal to 2.88 g/cm3 in the (NURE/CR- 6224), however, it was specified to be 2.5 g/cm3 according to the NUKON insulation Material Safety Data Sheet (MSDS)[10...
Stroud, David
of a periodic dielectric infused with NLC can be tuned, and even made to close, by suitably orienting
Characteristics of countercurrent vapor-liquid flow at a perforated plate
Sutherland, Samuel Shelton
1958-01-01
bars to form 0he slots. It is stated (I) that Turbogrid trays have been used successfully in a var1ety of dist1llation columns op- erating at pressures from 5 psia to 300 psig with vapor densities from 0. 00 to 2, 8 pounds per cubic foot. It i... of liquid. In view of this Hai was taken to be the level of spray which filled the whole cross-sectional area of the column. In such cases the spray in the center of the col- umn extended I to 2 1nches higher. In order to collect the water entrained...
Rinard, Martin C.
Traditional program transformations operate under the onerous constraint that they must preserve the exact behavior of the transformed program. But many programs are designed to produce approximate results. Lossy video ...
Carbajal, Luis
2015-01-01
Heat build-up in prosthetic sockets is a significant problem experienced by many amputees in America, with no central solution in sight. Heat and discomfort accounts for over 70% of problems experienced by lower limb ...
Functional MRI To Evaluate “Sense of Self” following Perforator Flap Breast Reconstruction
Caterson, Stephanie A.
Background: Breast reconstruction is associated with high levels of patient satisfaction. Previous patient satisfaction studies have been subjective. This study utilizes functional magnetic resonance imaging (fMRI) to ...
Using Code Perforation to Improve Performance, Reduce Energy Consumption, and Respond to Failures
Agarwal, Anant
2009-09-03
Many modern computations (such as video and audio encoders, Monte Carlo simulations, and machine learning algorithms) are designed to trade off accuracy in return for increased performance. To date, such computations ...
Augustinack, Jean
Ex vivo magnetic resonance imaging yields high resolution images that reveal detailed cerebral anatomy and explicit cytoarchitecture in the cerebral cortex, subcortical structures, and white matter in the human brain. Our ...
Exploring the effectiveness of loop perforation for quality of service profiling
Misailovíc, Saša
2010-01-01
Many computations exhibit a trade off between execution time and quality of service. A video encoder, for example, can often encode frames more quickly if it is given the freedom to produce slightly lower quality video. A ...
Fano manifolds whose elementary contractions are smooth -fibrations
Occhetta, Gianluca
partially supported by the Spanish government grant MTM2009-06964, and by the National Re- searcher Program 2010-0020413 of NRF.. Second author partially supported by the Spanish government grant MTM2009
Path Planning on Manifolds using Randomized Higher-Dimensional Continuation
Porta, Josep M.
´eonard Jaillet Abstract Despite the significant advances in path planning methods, problems in- volving highly constrained systems. It builds on recently developed tools for Higher-dimensional Continuation, which provide enveloping the sphere, the exploration is relatively homogeneous. b When the box is elongated along
A Morse complex for infinite dimensional manifolds Alberto Abbondandolo
Abbondandolo, Alberto
, . . . , dim M, Scuola Normale Superiore di Pisa, Piazza dei Cavalieri 7, 56126 Pisa, Italy, e-mail: abbo@sns.it. Dipartimento di Matematica "L. Tonelli", via Buonarroti 2, 56127 Pisa, Italy, e-mail: majer@dm.unipi.it 1The
GROUPOIDS AND AN INDEX THEOREM FOR CONICAL PSEUDO-MANIFOLDS
Nistor, Victor
] as well as [6, 26, 45, 46]. The index theorem for families and Bismut's superconnection formalism play
From the Boltzmann equation to fluid mechanics on a manifold
Peter J. Love; Donato Cianci
2012-08-27
We apply the Chapman-Enskog procedure to derive hydrodynamic equations on an arbitrary surface from the Boltzmann equation on the surface.
FIXED POINT INDICES AND MANIFOLDS WITH COLLARS Chen ...
2005-05-05
Brasiliero de Topologia 53 (1988), 59–67, Universidade de Sao Paulo, Sao Carlos S. P., Brasil. [8]. , A de Moivre like formula for fixed point theory, Proceedings ...
Homotopic Path Planning on Manifolds for Cabled Mobile Robots
Igarashi, Takeo
and power. Currently, cables are a viable option for robots that work in fixed environments such as homes are experimentally validated using a real robot. 1 Introduction Mobile robots are typically untethered. This is not always desirable in household and high-power robotics. Wireless communication can be unreliable
Lagrangian Mechanics on the standard Cliffordian Kaehler Manifolds
Mehmet Tekkoyun
2009-02-21
This study presents standard Cliffordian Kaehler analogue of Lagrangian mechanics. Also, the some geometric and physical results related to the standard Cliffordian Kaehler dynamical systems are given.
the tensor product in the theory of frobenius manifolds
Remark 1.1.4. Using Yn one .... The diagonal of Hon >< 11—4-0“. Denote the ..... I a dill/9212195111)”, + Z: dgl2cllgirglggnajn + Z Gig/2195219211111 cl cl! cl.
Manifold learning techniques for non-rigid structure from motion
Rabaud, Vincent C.
2009-01-01
reduction. In NIPS. Doll´ r, P. , Rabaud, V. , and Belongie,In a NIPS, volume 19. Doll´ r, P. , Rabaud, V. , andImage Man- ifolds, P. Doll´ r, V. Rabaud and S. Belongie,
Multi-Resolution Broadcasting Over the Grassmann and Stiefel Manifolds
Yanikomeroglu, Halim
§ Department of Electrical Engineering, Alexandria University, Alexandria 21544, Egypt Electronics Engineering Department, American University in Cairo, AUC Avenue, New Cairo 11835, Egypt Department of Systems and Computer Engineering, Carleton University, Ottawa, Canada Department of Electrical Engineering, Texas A
ARF INVARIANTS AND THE GEOGRAPHY OF EVEN 4--MANIFOLDS
Bohr, Christian
BOHR eight. In [14], P. Teichner proved that every combination of signature and fundamental group intersection form, signature n and fundamental group #5; if and only if n is a multiple of eight and H 1 (#5 form and prescribed fundamental group. As an application, we prove several results on the geography
Three-dimensional routed manifolds with externally inserted cables
Breinlinger, Keith J. (Keith Joseph), 1974-
2003-01-01
The Automatic Test Equipment industry must maintain a tester accuracy of roughly one tenth the pulsewidth of the device under test (DUT). Funneling a vast number of electrical signals into a very tiny area to contact the ...
Geometrical classification of Killing tensors on bidimensional flat manifolds
C. Chanu; L. Degiovanni; R. G. McLenaghan
2006-08-31
Valence two Killing tensors in the Euclidean and Minkowski planes are classified under the action of the group which preserves the type of the corresponding Killing web. The classification is based on an analysis of the system of determining partial differential equations for the group invariants and is entirely algebraic. The approach allows to classify both characteristic and non characteristic Killing tensors.
A GEOMETRIC FRAMEWORK FOR TRANSFER LEARNING USING MANIFOLD ALIGNMENT
Massachusetts at Amherst, University of
by: Sridhar Mahadevan, Chair Andrew McCallum, Member Erik Learned-Miller, Member Weibo Gong, Member Andrew G. Barto, Department Chair Department of Computer Science #12;ACKNOWLEDGMENTS I would like appreciative of the support offered by my other thesis committee members, Andrew McCallum, Erik Learned-Miller
A Multiresolution Manifold Distance for Invariant Image Similarity
Vasconcelos, Nuno M.
. In these cases, a large collection of images of the same ``theme'', e.g. face or outdoors images, are assembled database, labeling them with semantic tags related to that theme, e.g. ``images containing people increase the power and usefulness of the retrieval system. With respect to summarization, the standard
NOTES ON KNOT THEORY AND 3MANIFOLDS Sayed K. Roushon
Roushon, S. K.
Topology. Frequently we will be using the tubular neighborhood theorem, Hurewicz isomorphism theorem, Alexander Schoenflies theorem. The standard references are [S], [Gr], [G], [GP] etc. By a knot k we mean in general. But it is a standard fact that if the knot groups are isomorphic then the complements
A REMARK ON INVARIANT MANIFOLDS: THE OPTIMAL GAP CONDITION.
. This result improves recent theorems by C. Foias and by N. Casta~neda and R. Rosa. 1. Main Results From its
Large-Scale Methods for Nonlinear Manifold Learning
Vladymyrov, Maksym
2014-01-01
search directions, optimization techniques and N -body methods with specific NLEsearch directions, opti- mization techniques and N -body methods with specific NLE
Scrotal Swelling After Penetrating Chest Trauma
Heiner, Jason D; Skeins, Elizabeth C; DeVita, Diane; Litner, Joseph S
2009-01-01
intestinal or gastric perforation and pneumothorax. 1,2after intestinal perforation or infection. Spontaneous
Rose, Amy; Robinson, Maria; Kamino, Hideko; Latkowski, Jo-Ann
2012-01-01
xanthogranuloma leading to perforation. Arch Ophthalmolconjunctivitis, and corneal perforation [ 2 , 4 ]. The
Early Presentation of Buried Bumper Syndrome
Geer, Walter; Jeanmonod, Rebecca K.
2013-01-01
tube dysfunction, gastric perforation, bleeding, peritonitisacute bleeding, esophageal perforation, or aspiration, are
The Missing Percutaneous Endoscopic Gastrostomy Tube
Robinson, Darlene Y; Hamilton, Amber V
2010-01-01
through gastric wall Perforation Fistula Hemorrhagesigns of obstruction and perforation. A foreign body such as
Fournier, John J.F.
the definition shortly. These notes are intended to provide a lightning fast introduction to integration . Definition M.1 Let n 1 be an integer. (a) Let a IRn and > 0. The open ball of radius centred on a is B is open if and only if it is a union of open balls. (c) Fix any W IRn . A subset V W is said
Wong, Benjamin L.
2009-01-01
of a subchondral bone perforation on the load supportPerforations . 203subchondral bone plate perforation. Trans Orthop Res Soc 31:
A Retrospective Analysis of Emergency Department Ultrasound for Acute Appendicitis
Fox, John C; Hunt, Matthew J; Zlidenny, Alex M; Oshita, Masaru H; Barajas, Graciela; Langdorf, Mark I
2007-01-01
main factor leading to perforation. Imaging outside the EDappendicitis leading to perforation is the leading cause ofsubmucosa (indicating perforation). 13,21 Conversely, an
Outcomes and costs of surgical treatments of necrotizing enterocolitis
2015-01-01
with neonatal bowel perforation: a single-center experienceO, et al. Gastrointestinal perforations in neonatal period:under local anesthesia for perforations from necrotizing
Douglas, David
2010-01-01
walled-off small-bowel perforation and pseudocyst formation.by antenatal bowel perforation with spillage of meconiumof bowel obstruction and perforation include meconium ileus,
Delayed Presentation of Sigmoid Volvulus in a Young Woman
Weingrow, Daniel; McCague, Andrew; Shah, Ravi; Lalezarzadeh, Fariborz
2012-01-01
examination. 5 Gangrene and perforation are commonly earlyincludes risk of perforation. Expectant management is nothigh risk for gangrene or perforation. When gangrenous bowel
In the Soup: Caustic Ingestion from the Improper Consumption of a Self-Heating Soup
Hanson, Matthew; Hafner, John William
2012-01-01
caustic, stricture, perforation)? Curr Opin Gastroenterol.no evidence of esophageal perforation or abnormality. Theto have no esophageal perforation and no transmural or deep
Daley, T.M.
2011-01-01
sand and above the perforations, as shown in Figure 4.2 plume along with well perforation and packer locations. (plume along with well perforation and packer locations. (
The Handbook for Rapid Interpretation of the Audiogram
Colombo, Beth; Squires, Lane
2015-01-01
be associated with TM perforation or a mass in the middlehypermobility or, less frequently, a healing TM perforation.Normal OME, perforation, mass ETD OC fixation OC
An interactive teaching device simulating intussusception reduction
2010-01-01
A, Alton DJ, Ein S et al (1995) Perforation during attemptedin children—a comparison of perforation with barium and air.process, including perforation. This intussusception reduc-
2009-01-01
2007) Radiofrequency perforation of the right ventricularused to align the RF perforation catheter in the appropriateconnections; however, perforation from the SVC to the right
2013-01-01
Y, Abdullah F: Risk of perforation increases with delay inof the abdominal cavity (perforation of duodenal ulcer,rated diverticulitis) or perforation of an inflamed organ (
Approaches to Modeling Coupled Flow and Reaction in a 2-D Cementation Experiment
Cochepin, B.
2008-01-01
precipitation and perforation of a clogging obstacle madethan in Crunch. The perforation of the calcium oxalate wallevolve. First, the wall perforation occurs after ~50 days
Small Bowel Obstruction from Capsule Endoscopy
Boysen, Megan M; Ritter, Mike
2010-01-01
small bowel obstruction or perforation. 8-12 Volume XI, no .Small bowel obstruction and perforation are rare but seriousbowel obstruction or perforation. Diagnosis may be aided by
Analysis of Senate Bill 1508: Use of Propofol for Colonscopies
California Health Benefits Review Program (CHBRP)
2006-01-01
and potential risk for perforation of the colon. All threeMeSH Terms] “intestinal perforation”[MeSH Terms] “colonicAirway obstruction Intestinal perforation Prognosis Prognos*
2013 WSES guidelines for management of intra-abdominal infections
2013-01-01
J, Buhr HJ, Ritz JP: Perforation risk and patient age. [Riskpatients with colorectal perforation after colonoscopy. Amof colon endoscopic perforations. Acta Chir Belg 1993, 93(
Wessling, S.
2009-01-01
to the wellbore by perforation. Fig. 2 also shows twothe wellbore by casing perforations between 3787 and 3791 mthrough the 4-m long perforation zone now starts spreading
Borehole Seismic Monitoring at Otway Using the Naylor-1 Instrument String
Daley, T.M.
2010-01-01
was obtained when five perforation shots were performed in1. The timing between perforation and recording system wasperiod of the CRC-1 perforation shots. The second through
The Back Alley Revisited: Sepsis after Attempted Self-Induced Abortion
Saultes, Teresa A; Devita, Diane; Heiner, Jason D
2009-01-01
objects increases the risk of perforation, and intrauterineair from uterine perforation. Because the majority ofis suspicion of uterine perforation, bowel injury, abscess
Appelfeld, David
2013-01-01
fenestration system (CFS). The challenge is to evaluatean interconnected context for CFS performance, since some ofdesign criteria for widows and CFS in modern buildings are:
Appelfeld, David
2013-01-01
energy consumption is strongly influenced by the solar gainsSolar shading is an effective strategy to reduce overheating and diffuse direct sunlight thus reducing energy consumption [
Chen, Peter M.
's vulnerability to power outages is easy to understand and fix. A $119 uninterruptible power supply can keep data (files) because it is vulnerable to power outages and operating system crashes. Memory a system running long enough to dump memory to disk in the event of a power outage [APC96], or one can use
Appelfeld, David
2013-01-01
complex fenestration systems, Solar Energy, submitted foron prismatic glazing, Solar Energy 74 (2003) 157–173. [13]of glazings and windows, Solar Energy 69 (Suppl. 1–6) (2000)
The Genetic Basis of Crohn's Disease
Brutlag, Doug
obstruction Fistulas Anemia Perforation "Flare-ups" followed by periods of being healthy Perforating vs. Non-perforating Abcesses/free perforation vs. blockage/bleeding #12;Diagnosis Physical examination
Cecal Volvulus in Adolescence Presenting as Recurring Visits for Abdominal Pain
Browne, Nicole
2010-01-01
of cecal necrosis or perforation. 2 In the absence ofThe risk of bowel ischemia, perforation and sepsis increases
2015-01-01
of penetration and perforation. Int. J. Eng. Sci. 16, 793–absorbed during ballistic perforation of composite armours.
Salinity driven oceanographic upwelling
Johnson, David H. (Lakewood, CO)
1986-01-01
The salinity driven oceanographic upwelling is maintained in a mariculture device that includes a long main duct in the general shape of a cylinder having perforated cover plates at each end. The mariculture device is suspended vertically in the ocean such that one end of the main duct is in surface water and the other end in relatively deep water that is cold, nutrient rich and relatively fresh in comparison to the surface water which is relatively warm, relatively nutrient deficient and relatively saline. A plurality of elongated flow segregating tubes are disposed in the main duct and extend from the upper cover plate beyond the lower cover plate into a lower manifold plate. The lower manifold plate is spaced from the lower cover plate to define a deep water fluid flow path to the interior space of the main duct. Spacer tubes extend from the upper cover plate and communicate with the interior space of the main duct. The spacer tubes are received in an upper manifold plate spaced from the upper cover plate to define a surface water fluid flow path into the flow segregating tubes. A surface water-deep water counterflow is thus established with deep water flowing upwardly through the main duct interior for discharge beyond the upper manifold plate while surface water flows downwardly through the flow segregating tubes for discharge below the lower manifold plate. During such counterflow heat is transferred from the downflowing warm water to the upflowing cold water. The flow is maintained by the difference in density between the deep water and the surface water due to their differences in salinity. The upwelling of nutrient rich deep water is used for marifarming by fertilizing the nutrient deficient surface water.
Salinity driven oceanographic upwelling
Johnson, D.H.
1984-08-30
The salinity driven oceanographic upwelling is maintained in a mariculture device that includes a long main duct in the general shape of a cylinder having perforated cover plates at each end. The mariculture device is suspended vertically in the ocean such that one end of the main duct is in surface water and the other end in relatively deep water that is cold, nutrient rich and relatively fresh in comparison to the surface water which is relatively warm, relatively nutrient deficient and relatively saline. A plurality of elongated flow segregating tubes are disposed in the main duct and extend from the upper cover plate beyond the lower cover plate into a lower manifold plate. The lower manifold plate is spaced from the lower cover plate to define a deep water fluid flow path to the interior space of the main duct. Spacer tubes extend from the upper cover plate and communicate with the interior space of the main duct. The spacer tubes are received in an upper manifold plate spaced from the upper cover plate to define a surface water fluid flow path into the flow segregating tubes. A surface water-deep water counterflow is thus established with deep water flowing upwardly through the main duct interior for discharge beyond the upper manifold plate while surface water flows downwardly through the flow segregating tubes for discharge below the lower manifold plate. During such counterflow heat is transferred from the downflowing warm water to the upflowing cold water. The flow is maintained by the difference in density between the deep water and the surface water due to their differences in salinity. The upwelling of nutrient rich deep water is used for marifarming by fertilizing the nutrient deficient surface water. 1 fig.
Exploring the Manifold of Seismic Waves: Application to the Estimation of Arrival-Times
Kye M. Taylor; Michael J. Procopio; Christopher J. Young; Francois G. Meyer
2010-07-22
We propose a new method to analyze seismic time series and estimate the arrival-times of seismic waves. Our approach combines two ingredients: the times series are first lifted into a high-dimensional space using time-delay embedding; the resulting phase space is then parametrized using a nonlinear method based on the eigenvectors of the graph Laplacian. We validate our approach using a dataset of seismic events that occurred in Idaho, Montana, Wyoming, and Utah, between 2005 and 2006. Our approach outperforms methods based on singular-spectrum analysis, waveleta nalysis, and STA/LTA.
Path integrals on a compact manifold with non-negative curvature
Lim, Poon Chuan Adrian
2006-01-01
in Mathematics by Poon Chuan Adrian Lim Committee in charge:A. Intriligator Copyright Poon Chuan Adrian Lim, 2006 AllThe dissertation of Poon Chuan Adrian Lim is approved, and
Value Function Approximation on Non-Linear Manifolds for Robot Motor Control
Sugiyama, Masashi; Hachiya, Hirotaka; Towell, Christopher; Vijayakumar, Sethu
The least squares approach works efficiently in value function approximation, given appropriate basis functions. Because of its smoothness, the Gaussian kernel is a popular and useful choice as a basis function. However, ...
Randomized Path Planning on Manifolds based on Higher-Dimensional Continuation
Porta, Josep M.
Abstract Despite the significant advances in path planning methods, highly constrained problems are still constrained systems. The proposed planner builds on recently developed tools for higher is not cen- tered in, and tightly enveloped by the ambient space box, the sampling process is biased
Computing dynamics of copper-based SMA via centre manifold reduction of 3D models q
Melnik, Roderick
of applications in such areas as aerospace engineering, medicine, manufacturing (in- cluding automotive industry is based on the authors' contribution to the European Conference on Computational Mechanics, Munich, 1999 mechanics, and applied mathematics communities [4±13]. This interest has two major
LECTURES ON INDICES AND RELATIVE INDICES ON CONTACT AND CR-MANIFOLDS
Noether in [30]. Let S1 be the unit circle in the complex plane. A function or distribution on the unit function on the unit disk if and only if its negative Fourier coefficients all vanish. Define the sub) - dim(coker A). If the index is non-
Tin, Marie-Lyne Appoline
1992-01-01
, EhIMA I'OR COI&IPLEX POLYNOhllALS D. Vl'. R'I EX RL'Sl;L'I S 1. Vertes re&alta for real polynomials 2. Vertcs 1'&' sits fol' con&plea f&ol&'nonlials . CON('l. U'ilON IX I'ISRK '&L POI, 1 XOJIIAI. 1 7 7 11 18 19 20 2'& 24 2-1 2-1 2(i... interval control system 150 Image sct of the linear KJ n&anifolds at - ? r ' ~ linage set of the exposed edges at z = e"7 Image set of the exposed erlges at at z = e' "~' 153 155 35 36 hnage sct ol' the exposed erlt es at at = = e" h?age set...
Inertial manifolds for certain subgrid-scale $\\alpha$ models of turbulence
Abu Hamed, M; Abu Hamed, M; Guo, Y; Titi, ES; Titi, ES
2015-01-01
? 1 + 1 . By Gronwall’s inequality, one has kq(t)k ? e ?? Nversion of Poincar´e inequality ? 1 s?r |A r ?| ? |A s ?|,2 , which is due to H¨older’s inequality and Ladyzhenskaya’s
N=(4,4) Vector Multiplets on Curved Two-Manifolds
Lawrence, Albion
2015-01-01
We study the necessary conditions for preserving N=(4,4) supersymmetry on curved 2d backgrounds, following the strategy of Dumitrescu, Festuccia, and Seiberg. We derive the transformation laws and invariant action for off-shell Abelian vector multiplets. An explicit solution of the supersymmetry conditions is found on the round two-sphere.
Accepted for publication in J. Fluid Mech. 1 Stable Manifolds and the Transition to
Cvitanovc', Predrag
that the threshold scaled as Re with = -1, when the laminar flow was disturbed by a single boxcar pulse of fluid of fluid. For different disturbances of the laminar flow, Peixinho and Mullin (2007) found and other shear flows appear intermediate between turbulent and laminar motions. We take a step towards
An index theorem for families of Dirac operators on odddimensional manifolds with boundary
Melrose, Richard
. The derivation of the index formula is effected by the combination of the superconnection formalism of Quillen
Bibliographie [1] R. Abraham, J.E. Marsden, T. Ratiu (1988). Manifolds, Tensors Analysis, and Appli
1988-01-01
Inequalitites. Springer Monographs in Mathematics. Springer, New York. [23] A. Auslender, M. Teboulle, S. BenTiba (1999). A logarithmicquadratic proximal method for variational inequalitites. Computational
Exploring the Manifold of Seismic Waves: Application to the Estimation of Arrival-Times
Taylor, K M; Young, C J; Meyer, F G
2010-01-01
We propose a new method to analyze seismic time series and estimate the arrival-times of seismic waves. Our approach combines two ingredients: the times series are first lifted into a high-dimensional space using time-delay embedding; the resulting phase space is then parametrized using a nonlinear method based on the eigenvectors of the graph Laplacian. We validate our approach using a dataset of seismic events that occurred in Idaho, Montana, Wyoming, and Utah, between 2005 and 2006. Our approach outperforms methods based on singular-spectrum analysis, waveleta nalysis, and STA/LTA.
Three-dimensional numerical manifold method simulations for blocky rock analysis
Shentu, Longfei
2011-01-01
After decades of development, people realize that there are wider and more various applications of numerical modeling and analysis. However, current feasible software tools cannot satisfy engineering and commercial goals. ...
Charting a manifold Matthew Brand, MERL (draft revised Oct 2002 to appear NIPS'02)
Roberts, Stephen
construct a nonlinear mapping from a high-dimensional sample space to a low-dimensional vector space a mapping--expressed as a kernel-based mixture of linear projections-- that minimizes information loss about a standard gaussian mixture model (GMM) likelihood function with a prior that penalizes uncertainty due
Kaper, H. G.
1998-01-05
An interdisciplinary project encompassing sound synthesis, music composition, sonification, and visualization of music is facilitated by the high-performance computing capabilities and the virtual-reality environments available at Argonne National Laboratory. The paper describes the main features of the project's centerpiece, DIASS (Digital Instrument for Additive Sound Synthesis); ''A.N.L.-folds'', an equivalence class of compositions produced with DIASS; and application of DIASS in two experiments in the sonification of complex scientific data. Some of the larger issues connected with this project, such as the changing ways in which both scientists and composers perform their tasks, are briefly discussed.
Thalmaier, Anton
, Norway) Time Friday, June 22, 2012 at 2pm Place Campus Kirchberg, room A17 Ever since Arnold in 1966
MORSE THEORY FOR NORMAL GEODESICS IN SUB-RIEMANNIAN MANIFOLDS WITH CODIMENSION ONE DISTRIBUTIONS
Tausk, Daniel Victor
on M which is the orthogonal of a unit vector field Y on M* *. We do not make any sponsored by CNPq, Brazil (Processo n. 301410/* *95); the fourth author is spon- sored by FAPESP, S"ao Paulo, Brazil (Processo n. 98/12530-2). 1 #12
Manifold Methods for Energetic Materials Joseph M. Powers and Samuel Paolucci
.05 1.1 1.15 x 10 -3 t (ms) [CO2 ](mole/cc) a) b) c) d) #12;Goals · Implement robust new reduced kinetic foam layer, · gaseous flame region, · gas phase reactions greatest computational burden in simulations. T (K) x (cm) 300 3000 solid foam gas 0 10 #12;RDX GAS PHASE COMBUSTION SIMULATION · very similar to HMX
.5 3 3.5 4 x 10 -3 t (ms) [N2 ](mole/cc) 10 -10 10 -5 10 0 0.95 1 1.05 1.1 1.15 x 10 -3 t (ms) [CO2 in semi-infinite solid, · two-phase bubbly liquid foam layer, · gaseous flame region, · gas phase reactions greatest computational burden in simulations. T (K) x (cm) 300 3000 solid foam gas 0 10 #12;RDX
Thompson, Paul
Imaging Agatha D. Lee Natasha Lepore Franco Lepore Flamine Alary Caroline Brun Yiyu Chou Marina Barysheva Arthur W. Toga Paul M. Thompson 1 Problem Description [Introduce the problem assuming readers
Star products on graded manifolds and $?'$-corrections to double field theory
Andreas Deser
2015-11-12
Originally proposed as an $O(d,d)$-invariant formulation of classical closed string theory, double field theory (DFT) offers a rich source of mathematical structures. Most prominently, its gauge algebra is determined by the so-called C-bracket, a generalization of the Courant bracket of generalized geometry, in the sense that it reduces to the latter by restricting the theory to solutions of a "strong constraint". Recently, infinitesimal deformations of these structures in the string sigma model coupling $\\alpha'$ were found. In this short contribution, we review constructing the Drinfel'd double of a Lie bialgebroid and offer how this can be applied to reproduce the C-bracket of DFT in terms of Poisson brackets. As a consequence, we are able to explain the $\\alpha'$-deformations via a graded version of the Moyal-Weyl product in a class of examples. We conclude with comments on the relation between $B$- and $\\beta$-transformations in generalized geometry and the Atiyah algebra on the Drinfel'd double.
Sheaf theory for stacks in manifolds and twisted cohomology for S1 -gerbes
Schick, Thomas
for S1 -gerbes Ulrich Bunke, Thomas Schick and Markus Spitzweck"at G"ottingen, Bunsenstr. 3-5, 37073 G"o* *ttingen, GERMANY, bunke@uni- math.gwdg.de, schick
Manifold Assembly for the Convenient Polymerization of Ethylene Oxide and Butadiene
extensive glass-blowing expertise and are time-consuming. Another limitation of high-vacuum technique or treating the monomers in glass containers or when it is transferred into the glass reactor. Failure
Minnesota, University of
; and general geometric mapping between high dimensional surfaces. Ł Instituto de Ingenieria Electrica
EXPLICIT, IMPLICIT AND PARAMETRIC INVARIANT MANIFOLDS FOR MODEL REDUCTION IN CHEMICAL KINETICS
order accuracy AMS subject classifications. 80A22, 80M35 DOI. 10.1137/070680965 1. Introduction. Phase
A proof of Price's Law on Schwarzschild black hole manifolds for all angular momenta
Roland Donninger; Wilhelm Schlag; Avy Soffer
2010-07-12
Price's Law states that linear perturbations of a Schwarzschild black hole fall off as $t^{-2\\ell-3}$ for $t \\to \\infty$ provided the initial data decay sufficiently fast at spatial infinity. Moreover, if the perturbations are initially static (i.e., their time derivative is zero), then the decay is predicted to be $t^{-2\\ell-4}$. We give a proof of $t^{-2\\ell-2}$ decay for general data in the form of weighted $L^1$ to $L^\\infty$ bounds for solutions of the Regge--Wheeler equation. For initially static perturbations we obtain $t^{-2\\ell-3}$. The proof is based on an integral representation of the solution which follows from self--adjoint spectral theory. We apply two different perturbative arguments in order to construct the corresponding spectral measure and the decay bounds are obtained by appropriate oscillatory integral estimates.
Locating an atmospheric contamination source using slow manifolds Wenbo Tang,1
Tang, Wenbo
-dimensional atmospheric wind field in an urban street canyon. © 2009 American Institute of Physics. DOI: 10 in the limit of infinitesimally small particle size. Because of this singularity, finding the source of a dispersed set of small particles is a numerically ill-posed problem that leads to exponential blowup. Here
Bibliographie [1] R. Abraham, J.E. Marsden, T. Ratiu (1988). Manifolds, Tensors Analysis, and Appli-
1988-01-01
Cones and Functions in Optimization and Variational Inequalitites. Springer Monographs in Mathematics method for variational inequalitites. Computational Optimization and Applications, 12, 31Â40. [24] J.B.
Genealogy of Nonperturbative Quantum-Invariants of 3-Manifolds: The Surgical Family
Thomas Kerler
1996-03-22
We study the relations between the invariants $\\tau_{RT}$, $\\tau_{HKR}$, and $\\tau_L$ of Reshetikhin-Turaev, Hennings-Kauffman-Radford, and Lyubashenko, respectively. In particular, we discuss explicitly how $\\tau_L$ specializes to $\\tau_{RT}$ for semisimple categories and to $\\tau_{HKR}$ for Tannakian categories. We give arguments for that $\\tau_L$ is the most general invariant that stems from an extended TQFT. We introduce a canonical, central element, {\\sf Q}, for a quasi-triangular Hopf algebra, $\\A$, that allows us to apply the Hennings algorithm directly, in order to compute $\\tau_{RT}$, which is originally obtained from the semisimple trace-subquotient of $\\A-mod$. Moreover, we generalize Hennings' rules to the context of cobordisms, in order to obtain a TQFT for connected surfaces compatible with $\\tau_{HKR}\\,$. As an application we show that, for lens spaces and $\\A=U_q(sl_2)\\,$, the ratio of $\\tau_{HKR}$ and $\\tau_{RT}$ is the order of the first homology group. In the course of this paper we also outline the topology and the algebra that enter invariance proofs, which contain no reference to 2-handle slides, but to other moves that are local. Finally, we give a list of open questions regarding cellular invariants, as defined by Turaev-Viro, Kuperberg, and others, their relations among each other, and their relations to the surgical invariants from above.
Pylon-Based Jet Noise Suppressors Dimitri Papamoschou
Papamoschou, Dimitri
of coarse perforation, and porous flaps made of fine perforation. It is shown that all the deflectors reduce the perforations themselves can be shifted to very high frequency (rapidly attenuated by atmospheric absorption) by reducing the size of the perforation. Accordingly, the fine-perforation flaps provided superior acoustic
Razinkov, Ivan Alexandrovich
Stage Ti-CT-E Motorized Condenser Turret MEL51910 Ti-C-LWDLWD Lens Unit for SystemTurret 1 MEL56200 System LWD Ph L Annuli MEH31040 TE-C LWD
Ferry, Michael Stephen
2010-01-01
Motorized Stage Ti-CT-E Motorized Condenser Turret Ti-C-LWDLWD Lens Unit for SystemCondenser Turret 1 System LWD Ph L Annuli TE-C LWD Ph1
The prediction of low quality boiling voids
Griffith, P.
1963-01-01
Slug flow theory is used to predict the density in heated channels of various shapes. In order to make this calculation possible, measurements are made of the bubble rise velocity in annuli, tube bundles, and channels. It ...
www.rsc.org/analyst ISSN 0003-2654
Burns, Michael J.
coaxes that have annuli lled with any nonmetal, meaning solid, liquid, or gas, dielectric/ insulator of unconventional and economic ways of fabri- cating nanostructures and exploring their applications in optical
Mucocutaneous histoplasmosis in HIV with an atypical ecthyma like presentation
Mehta, Vandana; De, Abhishek; Balachandran, C; Monga, Puja
2009-01-01
showed a 1 x 1 cm palatal perforation. At this visit his HIValong with a palatal perforation (Figs. 4, 5, 6). Figure 5our patient also had palatal perforation and nasal cartilage
Pierce, Krystal Victoria Lords
2013-01-01
two-step formation, perforation, rope- drying, and massThe female skeleton had a perforation above the right eyeThe presence of a perforation above the right eye socket of
In situ measurement of the hydrulic diffusivity of the active Chelungpu Fault, Taiwan
Doan, Mai-Linh; Brodsky, Emily E.; Ma, Kuo-Fong; Kano, Yasuyuki
2006-01-01
indicate the top and bottom depths of the perforations.Perforation location is accurate to within 0.5 m. This12 ] Even before the perforation, hole A was artesian with a
Mukhopadhyay, S.
2013-01-01
the storage formation, the perforation thickness, and otheris the dimensionless r w r w perforation thickness. To solveassumed to be 0.1 m and the perforation thickness is assumed
Cultural Geography and Interregional Contacts in Prehistoric Liangshan (Southwest China)
Hein, Anke Marion
2013-01-01
such as grooves or perforation can be seen, the distinctionfew knives have only one perforation or none at all. The un-upper right-hand corner. This perforation combined with the
Wendler, Carlan; Shoenberger, Jan Marie; Mailhot, Thomas; Perera, Phillips
2012-01-01
et al. Atrial septal perforation from TIPS stent migration.4. Bala TM, Panda M. Cardiac perforation and tamponade: aBryant TJ, Barnard JJ. Cardiac perforation due to Wallstent
Three-year efficacy and safety of a new 52-mg levonorgestrel-releasing intrauterine system
Creinin, Mitchell David
2015-01-01
cy associated with a perforation. The pregnancies in Year 2investigator. Uterine perforation was reported in 3 (0.17%)performed. The two ( 0.11%) perforations that occurred with
O'Masta, MR; Compton, BG; Gamble, EA; Zok, FW; Deshpande, VS; Wadley, HNG
2015-01-01
residual velocities after perforation are also shown. Fig.Plate bulging prior to perforation pre-accelerates the reara prism apex resulted in full perforation with a debris exit
Pedram, Massoud
modeling, custom wire load models, back annotation of calculated delays, statistical wire length estimation domains must be addressed in an integrated fashion. Huge business opportunities will be lost unless more and physical design worlds, the exact delay and area values for each solution (considering both gates and wires
13-Year-Old with Cryptic Abdominal Pain
Spring, Stephanie; Anderson, Richard; Carlson, Jestin N.
2015-01-01
of Emergency Medicine perforation in a child: a case report.including gastric perforation has been reported. 6,7 The
Probabilistically Accurate Program Transformations
Rinard, Martin
of loop perforation (which transforms loops to execute fewer iterations) to a set of computational the probabilistic guarantees for those bounds. 1.1 Loop Perforation In this paper, we focus on loop perforation demonstrate the util- ity and effectiveness of loop perforation in reducing the amount of time (and/or other
Aquat. Living Resour. (2007) c EDP Sciences, IFREMER, IRD 2008
Sorin, Eric J.
2007-01-01
, and fishes to look at aspects of swimming perfor- mance, spawning behavior, foraging activity, and bioenerget
Mukamel, Shaul
2015-01-01
Bologna, Italy 2 Université de Lyon, CNRS, Institut de Chimie de Lyon, École Normale Supérieure de Lyon, 46 Allée d'Italie, F-69364 Lyon Cedex 07, France 3 Dipartimento di Fisica, Politecnico di Milano, IFN
Yarema A. Prykarpatsky; Nikolai N. Bogolubov Jr; Anatoliy K. Prykarpatsky; Valeriy H. Samoylenko
2011-05-22
A gradient-holonomic approach for the Lax type integrability analysis of differentialdiscrete dynamical systems is devised. The asymptotical solutions to the related Lax equation are studied, the related gradient identity is stated. The integrability of a discrete nonlinear Schredinger type dynamical system is treated in detail.
Caumon, Guillaume
Submitted to 2003 ACM Symposium on Solid Modeling and Applications Constrained modifications of non submitted to the 8th ACM Symposium on Solid Modeling and Applications (June 2003). Web Page: http
Paolucci, and Sandeep Singh University of Notre Dame submitted to Work in Progress Poster Session 28th@chaos.ame.nd.edu Sandeep Singh Ph.D. Candidate Department of Aerospace and Mechanical Engineering University of Notre Dame
2010-01-01
Classification: 35K20, 35J15, 80M40, 80A20 1. Introduction Let many small bodies (particles) Dm, 1 m M
Verleysen, Michel
, Universite´ catholique de Louvain, Av. Georges Lemaitre, 4, B-1348 Louvain-la-Neuve, Belgium b Machine-la-Neuve, Belgium a r t i c l e i n f o Available online 10 January 2009 Keywords: Nonlinear dimensionality mining and other industrial and research domains have more and more to deal with high- dimensional data
Zhou, Quanlin
, piping, and hydraulic fracturing) in embankment dams [810], for example. The unconfined flow subsurface in geotechnical and hydraulic engineering. The analysis of unconfined seepage is often used
Journal of Statistical Physics, Vol. 74. Nos. 1/2, 1994 Energy-Level Statistics of Model Quantum
Bleher, Pavel
Journal of Statistical Physics, Vol. 74. Nos. 1/2, 1994 Energy-Level Statistics of Model Quantum limit of a distribution for annuli of finite area. KEY WORDS: Energy-level statistics; integrable Received June 17. 1993 We investigate the statistics of the number N(R, S) of lattice points, n EZ
A model for eastward and westward jets in laboratory experiments and planetary atmospheres
Marcus, Philip S.
; accepted 21 October 1997 Flows in a rotating annular tank J. Sommeria, S. D. Meyers, and H. L. Swinney of the laboratory flow that is based on a Bickley jet; this raises concerns about previous calculations of Physics. S1070-6631 98 01405-6 I. INTRODUCTION In laboratory flows in rotating annuli that were designed
AGING OF GULF MENHADEN, BREVOORTIA PATRONUS WILLIAM R. NICHOLSON AND WILLIAM E. SCHAAF'
AGING OF GULF MENHADEN, BREVOORTIA PATRONUS WILLIAM R. NICHOLSON AND WILLIAM E. SCHAAF' ABSTRACT% of Gulf menhaden, Brevoortia patronus, caught in the purse seine fishery are ages 1 and 2. Few fish survive to age 3. About 50% ofthe fish examined for the years 1971-73 could be aged by scale annuli. Those
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...
Design and control of a mobile light ballet platform
Sibblies, Joshua Vincent Prescott
2014-01-01
Light ballet is the merging of art and technology; halogen lamps mounted on a turntable are placed inside of an opaque, perforated box. Light escapes through the perforations and creates a display of lights on surrounding ...
David Einspigel Curriculum Vitae
Cerveny, Vlastislav
in the detectability of perforation shots and microseismic events in the surface monitoring: the attenuation effect, Napa, USA, poster. Einspigel, D. & Eisner, L. 2012 Detection of perforation shots in surface monitoring
Virtual Colonoscopy: An Alternative Approach to Examination of the Entire Colon
and sedation required), time consuming (hours), and carries a small risk of perforation and death (colonic perforation in one in 500 to 1000 cases and death in one in 2,000 to 5,000 cases [29]). It fails
GEOPHYSICS, VOL. 68, NO. 2 (MARCH-APRIL 2003); P. 441452, 16 FIGS., 2 TABLES. 10.1190/1.1567214
,targetedsands,suggestinglit- tle or no hydraulic communication between the discrete perforation intervals simultaneously treated 200 m greater at the shallow perforation intervals than at the deeper in- tervals. The highest quality
Alexandrova, Ivana
professionals are certified to do a rape kit. A rape kit is a medical examinationinwhichsexualassault a rape kit perfor
Grether, D.
2012-01-01
Perfor- mance of Focusing Collectors," Solar Energy ResearchCollectors," Proceedings of the 1979 International Congress of the International Solar
Real-Time Evaluation of Stimulation and Diversion in Horizontal Wells
Tabatabaei Bafruei, Seyed Mohammad
2012-02-14
of the reactants and products .................................................... 59 Table 4.1 Inversion results for the first and second sets of perforation using MCMC method... ........................................................................................ 75 Table 4.2 Inversion results for the first set of perforation ....................................... 77 Table 4.3 Inversion results for the second set of perforation ................................... 77 Table 4.4 Inversion results...
Baker, Timothy S.
that accompany perforation of target membranes, and contributing directly to membrane penetration during cell kDa, 600 copies per virion), has been implicated in membrane perforation (reviewed in Chandran conformational changes in 1, which precede membrane perforation (Chandran et al., 2002, 2003; Odegard et al
NEST Manual of Operations APPENDIX B
Rau, Don C.
Enterocolitis (NEC) or Isolated Intestinal Perforation (IP): Outcomes at 18·22 Months Adjusted Age A Trial for ELBW Infants with Necrotizing Enterocolitis (NEC) or Isolated Intestinal Perforation (IP)". This study Enterocolitis (NEC) is a serious infection of the intestines. An Isolated Perforation (IP) is a hole in the wall
Tsvankin, Ilya
study with crosshole data generated by perforation shots in a horizontal borehole and recorded of the attenuation coefficient between perforation stages. Analy- sis of the shear-wave attenuation coefficient by perforation shots fired at regular intervals in a horizon- tal borehole. The wavefield was recorded by 10
Morse, Michael D.
in the frequency range of 11 300-16 500 cm- `. The highest- energy band system (labeled as the F system) was rota electronic state of 3d9,i3d~:O,~ 2~' with the 3d hole located in a ddr mo- lecular ordital
Novelia, A; O Reilly, OM
2015-01-01
attitudes of constant angular velocity motions. Internat. J.that have constant angular velocities. For instance, we areattitudes of constant angular velocity mo- tions in O’Reilly
Spatial and Seasonal Patterns in Speciated Fine Particle
Fischer, Emily V.
solenoid manifold to critical orifice and pump cyclone cartridge with 4 filter cassettes electronics manifold cartridge with 4 cassettes solenoid valve (4) hose from solenoid manifold to critical orifice
Self-defrosting recuperative air-to-air heat exchanger
Drake, Richard L. (Delmar, NY)
1993-01-01
A heat exchanger includes a stationary spirally or concentrically wound heat exchanger core with rotating baffles on upper and lower ends thereof. The rotating baffles include rotating inlets and outlets which are in communication with respective fixed inlets and outlets via annuli. The rotation of the baffles causes a concurrent rotation of the temperature distribution within the stationary exchanger core, thereby preventing frost build-up in some applications and preventing the formation of hot spots in other applications.
Enhancing Departments and Graduate Education in Geography
Foote, Kenneth; Solem, Michael
2009-01-01
., Blumhof, J., Chalkley, B., Gravestock, P., Honeybone, A., King, H. & and Thomas, N. (2002). A national discipline-based workshop for new lecturers in higher education. Active Learning In Higher Education, 3(2),128–44. Colker, R. & Day, R. (2003... ). The new academic generation: A profession in transformation. Baltimore: John Hopkins University Press. Gaudet, C., Annulis, H., & Carr, J. (2003). Building the geospatial workforce. URISA Journal, 15(1), 21-30. Gedye, S., Fender, E. & Chalkey, B...
Choi, Suhyoung
A survey of projective geometric structures on 2-,3-manifolds S. Choi Outline Classical geometries Euclidean geometry Spherical geometry Manifolds with geometric structures: manifolds need some canonical descriptions.. Manifolds with (real) projective structures A survey of projective geometric structures on 2
GAFA, Geom. funct. anal. Vol. 8 (1998) 17 58
Piazza, Paolo
1998-01-01
of the heat kernel on manifolds with conical singularities [C] and Bismut's superconnection heat kernel proof
Sullivan, Robert Edward
2012-01-01
the installation of a SCADA system and telecommunicationsthe PELM manifold, exterminating the SCADA system and, quite
Scalable microreactors and methods for using same
Lawal, Adeniyi (Livingston, NJ); Qian, Dongying (Millburn, NJ)
2010-03-02
The present invention provides a scalable microreactor comprising a multilayered reaction block having alternating reaction plates and heat exchanger plates that have a plurality of microchannels; a multilaminated reactor input manifold, a collecting reactor output manifold, a heat exchange input manifold and a heat exchange output manifold. The present invention also provides methods of using the microreactor for multiphase chemical reactions.
Diffeomorphism Algebra Structure and Membrane Theory
Jens Hoppe; Mariusz Hynek
2011-09-02
Explicit structure constants are calculated for certain Lie algebras of vectorfields on 2-dimensional compact manifolds.
Measurement of Hydrogen Purge Rates in Parabolic Trough Receiver Tubes: Preprint
Glatzmaier, G. C.
2010-10-01
The purpose of this research is to investigate and develop methods to remove hydrogen centrally from commercial parabolic trough power plants. A mathematical model was developed that tracks the generation and transport of hydrogen within an operating plant. Modeling results predicted the steady-state partial pressure of hydrogen within the receiver annuli to be ~1 torr. This result agrees with measured values for the hydrogen partial pressure. The model also predicted the rate at which hydrogen must be actively removed from the expansion tank to reduce the partial pressure of hydrogen within the receiver annuli to less than 0.001 torr. Based on these results, mitigation strategies implemented at operating parabolic trough power plants can reduce hydrogen partial pressure to acceptable levels. Transient modeling predicted the time required to reduce the hydrogen partial pressures within receiver annuli to acceptable levels. The times were estimated as a function of bellows temperature, getter quantity, and getter temperature. This work also includes an experimental effort that will determine the time required to purge hydrogen from a receiver annulus with no getter.
Kouznetsov, Dmitrii
comparative situations: i) when the magnetic induction ~B0 = ^kB0 is the same in the central perforation and in the box, and ii) when its values in the perforation ~Bi = ^kBi and in the box ~B0 = ^kB0 are different in the perforation as Bi ˇ B0 changes. PACS. 03.65.w Quantum mechanics. PACS. 03.65.Bz Aharonov-Bohm effect. I
System-Level Monitoring and Diagnosis of Building HVAC System
Wu, Siyu
2013-01-01
Housing, energy and thermal comfort: A review of 10D. Liao, Evaluation on energy and thermal perfor- mance forsystematic evaluation on energy and thermal performance for
2013 WSES guidelines for management of intra-abdominal infections
2013-01-01
managed by laparoscopic lavage. ANZ J Surg 2006, 76:962–965.gall bladder perforations. ANZ J Surg 2004, 74:843–846. 177.
workshop summary: State of the art and perspectives of risk assessment analysis
Essl, Franz
2011-01-01
behind in perfor? ming risk analyses for alien species, to what extent risk analysis protocols may really world’s top experts on risk analysis for biological
2015-01-01
such as hard radiation detection, 6–9 X- ray imaging, 10–12Radiation Perfor- mance for Room Temperature Gamma-Ray Detection.
Hazard evaluation for cutting tank 241-A-101 salt well casing
Board, B.D.
1997-01-10
This document identifies the hazards of using an abrasive water jet to add perforations to the salt well screen in tank 241-A-101.
ENERGY EFFICIENCY TECHNOLOGY ROADMAP VOLUME 7: INDUSTRIAL FOOD...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
leak detection Preliminary study how laser perforation of blueberry can improve fruit infusion with more yield and better quality Laser food processing (marker and micro...
Oil and Gas Lease Equipment and Operating Costs 1994 Through...
Annual Energy Outlook [U.S. Energy Information Administration (EIA)]
controllers Packers Electric labor - field Perforating Electric materials - field Pipe coating Fences Plastic tanks Field structures - small Pumping engines - gas Fishing tools...
&,Qcience Scrvice Feature Released on YeCoYpt
of telephone wircs 8s though they wero throads, the smashing of windows md t h e perforation of t i l e d roofs
Technically Recoverable Shale Oil and Shale Gas Resources
Annual Energy Outlook [U.S. Energy Information Administration (EIA)]
logs from 100 horizontal wells showed an enormous discrepancy in production between perforation clusters that is likely due to rock heterogeneity." One reason why...
Power module assemblies with staggered coolant channels
Herron, Nicholas Hayden; Mann, Brooks S; Korich, Mark D
2013-07-16
A manifold is provided for supporting a power module assembly with a plurality of power modules. The manifold includes a first manifold section. The first face of the first manifold section is configured to receive the first power module, and the second face of the first manifold section defines a first cavity with a first baseplate thermally coupled to the first power module. The first face of the second manifold section is configured to receive the second power module, and the second face of the second manifold section defines a second cavity with a second baseplate thermally coupled to the second power module. The second face of the first manifold section and the second face of the second manifold section are coupled together such that the first cavity and the second cavity form a coolant channel. The first cavity is at least partially staggered with respect to second cavity.
Air-fuel ratio controller for a turbocharged internal combustion engine
Serve, J.V.; Eckard, D.W.
1988-09-13
This patent describes an air-fuel ratio controller for a gaseous-fueled, turbo-charged engine having an air manifold, a gas manifold, and a turbine inlet. The controller consists of: means for controlling air manifold pressure, comprising means for providing an air manifold pressure set point signal based on gas manifold pressure and engine RPM's and at least one constant input; and means for controlling turbine inlet temperature, the means comprising means for modulating the slope of the set point signal for the air manifold pressure controller.
Energy Aware Consolidation for Cloud Computing Shekhar Srikantaiah
Zhao, Feng
resource usage, perfor- mance, and energy usages are not additive. Understand- ing the nature involved. We experimentally study how perfor- mance, energy usage, and resource utilization changes insights to infer optimal operating points that minimize energy usage with and without performance
Well completion process for formations with unconsolidated sands
Davies, David K. (Kingwood, TX); Mondragon, III, Julius J. (Redondo Beach, CA); Hara, Philip Scott (Monterey Park, CA)
2003-04-29
A method for consolidating sand around a well, involving injecting hot water or steam through well casing perforations in to create a cement-like area around the perforation of sufficient rigidity to prevent sand from flowing into and obstructing the well. The cement area has several wormholes that provide fluid passageways between the well and the formation, while still inhibiting sand inflow.
Sex-specific development of avian flight performance under experimentally altered
starling, flight ability, predation risk, sexual size dimorphism. [Behav Ecol 18:967973 (2007)] In birds for variation in flight perfor- mance in juvenile European starlings (Sturnus vulgaris), a sexually size-dimorphic conditions in sexually size-dimorphic species. Key words: development, escape perfor- mance, european
Squeeze cement method using coiled tubing
Underdown, D.R.; Ashford, J.D.; Harrison, T.W.; Eastlack, J.K.; Blount, C.G.; Herring, G.D.
1986-12-09
A method is described of squeeze cementing a well wherein the well has a casing throughout the wellbore, casing cement between the casing and the wellbore of the well, perforations through the casing and the casing cement to establish fluid communication between the interior of the casing and a formation adjacent the perforations, channels in the casing cement in fluid communication with at least some of the perforations, a well tubing string in the casing extending from the surface to the proximity of the perforations, and a packer means for sealing between the tubing and the casing above the perforations. The method consists of: isolating the casing adjacent the perforations; lowering a coiled tubing down the well tubing string to a point adjacent the perforations; flowing uncontaminated squeeze cement through the coiled tubing and through the perforations into the channels; flowing a cement contaminating liquid down the coiled tubing to mix with the squeeze cement remaining in the casing; allowing the uncontaminated squeeze cement in the channels to harden; and removing the contaminated squeeze cement from the casing through the coiled tubing.
X12A SAFETY CHECKLIST BROOKHAVEN NATIONAL LABORATORY NATIONAL SYNCHROTRON LIGHT SOURCE
Johnson, Peter D.
exclusion zone EZ1 (part 1) in place and secure. 5. Water is flowing through the beryllium window (check Bremsstrahlung shield in place and secure (acts as X12A exclusion zone) 7. Perforated aluminum exclusion zone EZ1 shield. 3. Bremsstrahlung shield BS1 in place and secure, as in photograph 4. Perforated aluminum
EDGE TESSELLATIONS AND THE STAMP FOLDING MATTHEW KIRBY AND RON UMBLE
Umble, Ron
." How many ways can one con...gure the perforation lines on a sheet of postage stamps so that it folds that perforation lines in a sheet of postage stamps that folds into a stack of single stamps are lines of symmetry
COM224 -TD 5 Codes convolutifs
Rioul, Olivier
un des 4 bits de sortie. Cette opĂ©ration s'appelle une perforation. On rĂ©alise ainsi un code de taux 2 3 . Il existe 4 possibilitĂ©s de perforation , donc 4 codes. Calculer la distance libre de ces 4
Virtual Oxygen Sensor for Innovative NOx and PM Emission Control Technologies
Broader source: Energy.gov [DOE]
A virtual O2 sensor for the intake manifold of a diesel engine equipped with EGR, along with a virtual intake manifold O2 sensor, show good accuracy with stationary measurements
Relativistic mechanics in a general setting
G. Sardanashvily
2010-05-07
Relativistic mechanics on an arbitrary manifold is formulated in the terms of jets of its one-dimensional submanifolds. A generic relativistic Lagrangian is constructed. Relativistic mechanics on a pseudo-Riemannian manifold is particularly considered.
Optimization Online - Nonlinear Optimization Submissions - 2013
Nonlinear Optimization Submissions - 2013. January 2013. A Framework of Constraint Preserving Update Schemes for Optimization on Stiefel Manifold
Functional inequalities for subelliptic diffusion operators via ...
Fabrice Baudoin
2012-07-15
Apr 16, 2012 ... The curvature dimension inequality on Riemannian manifolds. In Riemannian geometry the Ricci tensor plays a fundamental role.
Anderson, Iver E. (Ames, IA); Figliola, Richard S. (Central, SC); Molnar, Holly M. (Palm Bay, FL)
1992-06-30
High pressure atomizing nozzle includes a high pressure gas manifold having a divergent expansion chamber between a gas inlet and arcuate manifold segment to minimize standing shock wave patterns in the manifold and thereby improve filling of the manifold with high pressure gas for improved melt atomization. The atomizing nozzle is especially useful in atomizing rare earth-transition metal alloys to form fine powder particles wherein a majority of the powder particles exhibit particle sizes having near-optimum magnetic properties.
Anderson, I.E.; Figliola, R.S.; Molnar, H.M.
1993-07-20
High pressure atomizing nozzle includes a high pressure gas manifold having a divergent expansion chamber between a gas inlet and arcuate manifold segment to minimize standing shock wave patterns in the manifold and thereby improve filling of the manifold with high pressure gas for improved melt atomization. The atomizing nozzle is especially useful in atomizing rare earth-transition metal alloys to form fine powder particles wherein a majority of the powder particles exhibit particle sizes having near-optimum magnetic properties.
Motivation Defect correction The algorithm Summary Defect correction in optimization
Hemker, P.W.
Motivation Defect correction The algorithm Summary Defect correction in optimization "Manifold Mapping" P.W. Hemker IPIR/CWI/UvA June 11, 2010 Manifold Mapping P.W. Hemker #12;Motivation Defect correction The algorithm Summary Motivation Motivation determine x1, x2, x1, x3, x4, x5, x6, x7 Manifold
Spin Handbook QIAquick PCR Purification Kit
Kirschner, Marc W.
Protocols 18 QIAquick PCR Purification Kit Protocols 18 using a microcentrifuge 18 using a vacuum manifold a microcentrifuge 23 using a vacuum manifold 25 Troubleshooting Guide 28 Appendix: QIAvac Vacuum Manifolds 30 for that purpose by the Food and Drug Administration in the USA or the appropriate regulatory authorities
Stefanopoulou, Anna
control study. The case study treated in the paper deals with a turbocharger power assist system (TPAS manifold ambient pressure density in intake manifold density in exhaust manifold turbocharger speed engine volumetric efficiency turbine isentropic efficiency compressor isentropic efficiency turbocharger mechanical
Aspects of the life history of the silver seatrout, Cynoscion nothus, in the Gulf of Mexico
DeVries, Douglas A
1979-01-01
was developed. The mean back- calculated length at the first annulus was 156 mm SL. No fish had scales with two annuli and only 2. 6/ of 1483 fish aged had one annulus. Growth occurs throughout the year, but slows considerably during winter. Total annual...-LENGTH, GIRTH-LENGTH, AND STANDARD LENGTH-TOTAL LENGTH RELATIONSHIPS . . . . . . . . . . . . . . ~ 49 S UMMARY LITERATURE CITED 51 54 VITA 59 LIST OF FIGURES Figure Page Sizes of immature and female C. nothus in maturity stages 2 through 8. Maturity...
Jet-controlled freeze valve for use in a glass melter
Routt, K.R.
1985-07-29
A drain valve for use in furnace for the melting of thermoplastic material is disclosed. The furnace includes a drain cavity formed in its bottom for withdrawing a flow of thermoplastic material. The drain valve includes a flow member which include a flow tube having an inlet and outlet for the material, and coaxially disposed concentric tubular members defining annuli surrounding the flow tube. The tubular members include heating and cooling means for the flow tube. The drain valve can also be used in a furnace of glass melting that includes a drain cavity for withdrawing molten glass from the furnace.
Self-defrosting recuperative air-to-air heat exchanger
Drake, R.L.
1993-12-28
A heat exchanger is described which includes a stationary spirally or concentrically wound heat exchanger core with rotating baffles on upper and lower ends thereof. The rotating baffles include rotating inlets and outlets which are in communication with respective fixed inlets and outlets via annuli. The rotation of the baffles causes a concurrent rotation of the temperature distribution within the stationary exchanger core, thereby preventing frost build-up in some applications and preventing the formation of hot spots in other applications. 3 figures.
On the metric structure of space-time
Jochen Rau
2010-09-28
I present an analysis of the physical assumptions needed to obtain the metric structure of space-time. For this purpose I combine the axiomatic approach pioneered by Robb with ideas drawn from works on Weyl's "Raumproblem". The concept of a Lorentzian manifold is replaced by the weaker concept of an "event manifold", defined in terms of volume element, causal structure and affine connection(s). Exploiting properties of its structure group, I show that distinguishing Lorentzian manifolds from other classes of event manifolds requires the key idea of general relativity: namely that the manifold's physical structure, rather than being fixed, is itself a variable.
Jet-Ricci Geometry of Time-Dependent Human Biomechanics
Ivancevic, Tijana T
2009-01-01
We propose the time-dependent generalization of an `ordinary' autonomous human biomechanics, in which total mechanical + biochemical energy is not conserved. We introduce a general framework for time-dependent biomechanics in terms of jet manifolds derived from the extended musculo-skeletal configuration manifold. The corresponding Riemannian geometrical evolution follows the Ricci flow diffusion. In particular, we show that the exponential-like decay of total biomechanical energy (due to exhaustion of biochemical resources) is closely related to the Ricci flow on the biomechanical configuration manifold. Keywords: Time-dependent biomechanics, extended configuration manifold, configuration bundle, jet manifolds, Ricci flow diffusion
Anti-rewet felt for use in a papermaking machine
Beck, David A.
2003-09-09
An anti-rewet fabric is used for carrying a fiber web through an air press. The anti-rewet fabric includes at least one air distribution fabric layer, one air distribution fabric layer being configured for contacting the fiber web, and a perforated film layer, the perforated film layer being made of a polyester film. The perforated film layer has a first film side and a second film side, the first film side being one of laminated and attached to the one air distribution fabric layer.
Gradient zone-boundary control in salt-gradient solar ponds
Hull, J.R.
1982-09-29
A method and apparatus for suppressing zone boundary migration in a salt gradient solar pond includes extending perforated membranes across the pond at the boundaries, between the convective and non-convective zones, the perforations being small enough in size to prevent individual turbulence disturbances from penetrating the hole, but being large enough to allow easy molecular diffusion of salt thereby preventing the formation of convective zones in the gradient layer. The total area of the perforations is a sizeable fraction of the membrane area to allow sufficient salt diffusion while preventing turbulent entrainment into the gradient zone.
Gradient zone boundary control in salt gradient solar ponds
Hull, John R. (Downers Grove, IL)
1984-01-01
A method and apparatus for suppressing zone boundary migration in a salt gradient solar pond includes extending perforated membranes across the pond at the boundaries, between the convective and non-convective zones, the perforations being small enough in size to prevent individual turbulence disturbances from penetrating the hole, but being large enough to allow easy molecular diffusion of salt thereby preventing the formation of convective zones in the gradient layer. The total area of the perforations is a sizable fraction of the membrane area to allow sufficient salt diffusion while preventing turbulent entrainment into the gradient zone.
Apparatus and method for cooling a combustor cap
Zuo, Baifang; Washam, Roy Marshall; Wu, Chunyang
2014-04-29
A combustor includes an end cap having a perforated downstream plate and a combustion chamber downstream of the downstream plate. A plenum is in fluid communication with the downstream plate and supplies a cooling medium to the combustion chamber through the perforations in the downstream plate. A method for cooling a combustor includes flowing a cooling medium into a combustor end cap and impinging the cooling medium on a downstream plate in the combustor end cap. The method further includes flowing the cooling medium into a combustion chamber through perforations in the downstream plate.
Microchannel heat sink assembly
Bonde, W.L.; Contolini, R.J.
1992-03-24
The present invention provides a microchannel heat sink with a thermal range from cryogenic temperatures to several hundred degrees centigrade. The heat sink can be used with a variety of fluids, such as cryogenic or corrosive fluids, and can be operated at a high pressure. The heat sink comprises a microchannel layer preferably formed of silicon, and a manifold layer preferably formed of glass. The manifold layer comprises an inlet groove and outlet groove which define an inlet manifold and an outlet manifold. The inlet manifold delivers coolant to the inlet section of the microchannels, and the outlet manifold receives coolant from the outlet section of the microchannels. In one embodiment, the manifold layer comprises an inlet hole extending through the manifold layer to the inlet manifold, and an outlet hole extending through the manifold layer to the outlet manifold. Coolant is supplied to the heat sink through a conduit assembly connected to the heat sink. A resilient seal, such as a gasket or an O-ring, is disposed between the conduit and the hole in the heat sink in order to provide a watertight seal. In other embodiments, the conduit assembly may comprise a metal tube which is connected to the heat sink by a soft solder. In still other embodiments, the heat sink may comprise inlet and outlet nipples. The present invention has application in supercomputers, integrated circuits and other electronic devices, and is suitable for cooling materials to superconducting temperatures. 13 figs.
Microchannel heat sink assembly
Bonde, Wayne L. (Livermore, CA); Contolini, Robert J. (Pleasanton, CA)
1992-01-01
The present invention provides a microchannel heat sink with a thermal range from cryogenic temperatures to several hundred degrees centigrade. The heat sink can be used with a variety of fluids, such as cryogenic or corrosive fluids, and can be operated at a high pressure. The heat sink comprises a microchannel layer preferably formed of silicon, and a manifold layer preferably formed of glass. The manifold layer comprises an inlet groove and outlet groove which define an inlet manifold and an outlet manifold. The inlet manifold delivers coolant to the inlet section of the microchannels, and the outlet manifold receives coolant from the outlet section of the microchannels. In one embodiment, the manifold layer comprises an inlet hole extending through the manifold layer to the inlet manifold, and an outlet hole extending through the manifold layer to the outlet manifold. Coolant is supplied to the heat sink through a conduit assembly connected to the heat sink. A resilient seal, such as a gasket or an O-ring, is disposed between the conduit and the hole in the heat sink in order to provide a watetight seal. In other embodiments, the conduit assembly may comprise a metal tube which is connected to the heat sink by a soft solder. In still other embodiments, the heat sink may comprise inlet and outlet nipples. The present invention has application in supercomputers, integrated circuits and other electronic devices, and is suitable for cooling materials to superconducting temperatures.
Fuel combustion exhibiting low NO{sub x} and CO levels
Keller, J.O.; Bramlette, T.T.; Barr, P.K.
1996-07-30
Method and apparatus are disclosed for safely combusting a fuel in such a manner that very low levels of NO{sub x} and CO are produced. The apparatus comprises an inlet line containing a fuel and an inlet line containing an oxidant. Coupled to the fuel line and to the oxidant line is a mixing means for thoroughly mixing the fuel and the oxidant without combusting them. Coupled to the mixing means is a means for injecting the mixed fuel and oxidant, in the form of a large-scale fluid dynamic structure, into a combustion region. Coupled to the combustion region is a means for producing a periodic flow field within the combustion region to mix the fuel and the oxidant with ambient gases in order to lower the temperature of combustion. The means for producing a periodic flow field can be a pulse combustor, a rotating band, or a rotating cylinder within an acoustic chamber positioned upstream or downstream of the region of combustion. The mixing means can be a one-way flapper valve; a rotating cylinder; a rotating band having slots that expose open ends of said fuel inlet line and said oxidant inlet line simultaneously; or a set of coaxial fuel annuli and oxidizer annuli. The means for producing a periodic flow field may or may not be in communication with an acoustic resonance. When employed, the acoustic resonance may be upstream or downstream of the region of combustion. 14 figs.
The massive star population in M101. II. Spatial variations in the recent star formation history
Grammer, Skyler; Humphreys, Roberta M. E-mail: roberta@umn.edu
2014-09-01
We investigate star formation history (SFH) as a function of radius in M101 using archival Hubble Space Telescope Advanced Camera for Surveys photometry. We derive the SFH from the resolved stellar populations in five 2' wide annuli. Binning the SFH into time frames corresponding to stellar populations traced by H?, far-ultraviolet, and near-ultraviolet emission, we find that the fraction of stellar populations young enough to contribute in H? is 15%-35% in the inner regions, compared to less than 5% in the outer regions. This provides a sufficient explanation for the lack of H? emission at large radii. We also model the blue to red supergiant ratio in our five annuli, examine the effects that a metallicity gradient and variable SFH have on the predicted ratios, and compare to the observed values. We find that the radial behavior of our modeled blue to red supergiant ratios is highly sensitive to both spatial variations in the SFH and metallicity. Incorporating the derived SFH into modeled ratios, we find that we are able to reproduce the observed values at large radii (low metallicity), but at small radii (high metallicity) the modeled and observed ratios are discrepant.
Stefanopoulou, Anna
Oil & Gas Science and Technology -- Rev. IFP Energies nouvelles Copyright © 2010 IFPEN Energies to an effective thermal management system and to maintain safety, perfor- #12;2 Oil & Gas Science and Technology
Gadgil, Ashok (El Cerrito, CA); Garud, Vikas (Bombay, IN)
1998-07-14
A UV disinfector with a gravity driven feed water delivery system, and an air-suspended bare UV lamp. The disinfector is hydrodynamically optimized with a laminerizing, perforated baffle wall, beveled treatment chamber, and outlet weir.
Mandal, Esan
2004-09-30
The goal of this thesis is to introduce new methods to create intricate perforated shapes in a computing environment. Modeling shapes with a large number of holes and handles, while requiring minimal human interaction, is ...
: An Extensible Platform for Application-Aware Anonymity Micah Sherr
Ives, Zachary G.
. Similarly, several path instantiation approaches exist. Onion Routing [30] and Tor's telescoping scheme [9 multi-metric perfor- mance constraints as well as existing relay selection algorithms employed by Tor
Active negative-index metamaterial powered by an electron beam
Shapiro, Michael
An active negative index metamaterial that derives its gain from an electron beam is introduced. The metamaterial consists of a stack of equidistant parallel metal plates perforated by a periodic array of holes shaped as ...
Ramachandran, Rajesh
2006-04-12
Perfringolysin O (PFO), a cytolytic toxin from by the pathogenic bacterium Clostridium perfringens, perforates mammalian cell membranes by forming large aqueous pores. Secreted as water-soluble monomers, the toxin molecules bind to cholesterol...
An Active Measurement System for Shared Environments Joel Sommers
Barford, Paul
. Active measurement studies of Internet path properties that require precisely crafted probe streams canAn Active Measurement System for Shared Environments Joel Sommers Colgate University jsommers, Measurement, Perfor- mance Keywords: Active Measurement, Packet Scheduling, MAD 1. INTRODUCTION Several key
Pilatzke, Innes Flora Christina
1999-01-01
Maturing laticifer cells of the opium poppy, Papaver somniferum L., have their common wails perforated in order to develop a continuous system of latex vessels throughout the plant. In poppy, this latex is alkaloid-rich ...
Automatic Passenger Detection in Safety Critical Mass Transit Environments
Paris-Sud XI, UniversitĂ© de
the different radiofrequency and signal processing subsets in order to evaluate and validate the full system are periodically perforated in the waveguide to constitute the radars. An optimal bandwidth and constant radiation
Felix Hausdorff and the Hausdorff edition Erhard Scholz, (Wuppertal, Germany)
Scholz, Erhard
adapting to the values of the Wilhelminean offi- cer corps. At the time it was quite successful. It had about 300 perfor- mances between 1904 and 1930 at about 40 towns, among them Berlin, Budapest, Prag
Photon Science for Renewable Energy
Hussain, Zahid
2010-01-01
and durability of lithium-ion batteries to maintain per-For example, in lithium-ion batteries (used in everythingenergy density of lithium- ion batteries. The polymers, when
Structural elucidation of a common architecture of the nuclear pore complex and COPIl vesicle coats
Brohawn, Stephen Graf
2010-01-01
Nuclear pore complexes (NPCs) are massive protein assemblies that perforate the nuclear envelope and form the exclusive passageway for nucleocytoplasmic transport. NPCs play critical roles in molecular transport and a ...
2014-01-01
of low mobility on organic solar cell perfor- mance" , 15thPCBM is nearly ideal for solar cells: the coupling betweenof Conjugated Polymer-based Solar Cells: Time-Resolved
DOE/EA-1239 Environmental Assessment Disposition...
Broader source: Energy.gov (indexed) [DOE]
the Atomic Energy Act, that (i) it has the fll capacity, power and authority to enter into and perfor this Sales Contract and the transactions contemplated herein, and (ii)...
a patterned sample into a HRG colloidal suspension. The solvent for this HRG suspen- sion is a mixture of DMF-area, and flexible electronic applications. The perfor- mance and stability of OFETs critically depends
Anode Materials DOI: 10.1002/anie.200804355
Cho, Jaephil
in High-Perfor- mance Lithium Secondary Batteries** Hyunjung Kim, Byunghee Han, Jaebum Choo, and Jaephil the capacity of graphite (ca. 372 mAhgŔ1 ),[1] which is currently used as an anode material. In spite
Static Temperature Survey At Long Valley Caldera Geothermal Area...
and the surrounding rocks. The casing in wells 13-26 and 68-28 were damaged during this process, prohibiting access to deeper parts of these wells below the perforation depth....
A COMPLETE SYSTEM FOR POLYPS FLAGGING IN VIRTUAL COLONOSCOPY
present a complete pipeline for polyp flagging based on a simple segmentation technique that enhances are not rare (5% to 15% [4]), and there is the additional risk of perforating the colon. In a large study
Dynamic workload characterization for energy efficient computing
Dhiman, Gaurav
2011-01-01
we do this by using the perfor- mance monitoring unit (PMU).The PMU is an independent hardware unit with four 32-bitcycles (CCNT) elapsed since the PMU was started in order to
Implementing an integrated pest management (IPM) program in child care centers: A qualitative study
Kalmar, E; Ivey, SL; Bradman, A; Leonard, V; Alkon, A
2015-01-01
Care and Education Programs, Third Edition, and the U.S.edition of Caring for our Children, national health and safety perfor- mance standards for out-of-home child care programs,
Jet impingement heat transfer in two-pass rotating rectangular channels
Zhang, Yuming
1996-01-01
The combined effects of rotation and jet impingement on local heat transfer in a two-pass rotating rectangular channel is studied. The results of an experimental investigation on the surface heat transfer coefficients under a perforated plate...
a random choice condition ( 2 d.f. 1; P 0.031). Between individuals,
Chittka, Lars
for makingerrorsbypenalizingincorrectchoices with aversive quinine solution. Distractor flowers each bore a 10- l droplet of 0.12% quinine accurate. The improvement in perfor- mance was not simply an effect of prolonged training: when the quinine
Shabelansky, Andrey Hanan
2012-01-01
We present a numerical study of seismic imaging of hydraulically stimulated fractures using a single source from an adjacent fracturing-process. The source is either a point force generated from the perforation of the ...
Towards Energy and Resource Efficient Manufacturing: A Processes and Systems Approach
2012-01-01
Between Gases Formed and the Casting Surface Quality – Partof Models for Steelmaking and Casting Environmental Perfor-1998) Pro?le of the Metal Casting Industry, EPA/310-R-97-
Scientific Software Libraries for Scalable Architectures
Glowinski, Roland
Scientific Software Libraries for Scalable Architectures S. Lennart Johnsson Kapil K. Mathur TR19; Scientific Software Libraries for Scalable Architectures S. Lennart Johnsson Kapil K. Mathur Thinking introduce new demands on software systems with respect to perfor mance, scalability, robustness
Multi-mode Energy Management for Multi-tier Server Tibor Horvath
Huang, Wei
Multi-mode Energy Management for Multi-tier Server Clusters Tibor Horvath tibor Charlottesville, VA 22904 ABSTRACT This paper presents an energy management policy for recon- figurable clusters General Terms Algorithms, Design, Experimentation, Management, Perfor- mance Keywords energy management