Multiple concentric annuli for characterizing spatially nonuniform backgrounds
James Theiler; Jeff Bloch
1999-01-26T23:59:59.000Z
A method is presented for estimating the background at a given location on a sky map by interpolating the estimated background from a set of concentric annuli which surround this location. If the background is nonuniform but smoothly varying, this method provides a more accurate (though less precise) estimate than can be obtained with a single annulus. Several applications of multi-annulus background estimation are discussed, including direct testing for point sources in the presence of a nonuniform background, the generation of "surrogate maps" for characterizing false alarm rates, and precise testing of the null hypothesis that the background is uniform.
Yates, D.N. Jr.; Myers, W.D.
1991-11-26T23:59:59.000Z
This patent describes a perforating gun for insertion in a wellbore into a formation. It includes a tubular housing and a tubular element, defining a flow passage.
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
Donovan, J.F.; Naquin, M.J.
1991-12-31T23:59:59.000Z
This patent describes a system for preparing a formation to allow hydrocarbons to be produced from a well. It comprises an elongated perforating gun; means extending from the outer periphery of the gun, in a generally radial direction from its longitudinal axis, for facilitating extraction of the gun from the well, the means operable when the gun is covered with a solid material delivered into the well and lodged between the formation and the gun; and the means imparting a longitudinal extractive force when the gun is rotated along its longitudinal axis.
Manifold Integration: Data Integration on Multiple Manifolds
Choi, Hee Youl
2011-08-08T23:59:59.000Z
MANIFOLD INTEGRATION: DATA INTEGRATION ON MULTIPLE MANIFOLDS A Dissertation by HEE YOUL CHOI Submitted to the O?ce of Graduate Studies of Texas A&M University in partial fulflllment of the requirements for the degree of DOCTOR OF PHILOSOPHY... May 2010 Major Subject: Computer Science MANIFOLD INTEGRATION: DATA INTEGRATION ON MULTIPLE MANIFOLDS A Dissertation by HEE YOUL CHOI Submitted to the O?ce of Graduate Studies of Texas A&M University in partial fulflllment of the requirements...
Two delayed critical uranium (93.2) metal cylindrical annuli with central Be moderation
Mihalczo, J.T.; Bentzinger, D.L.
1997-08-01T23:59:59.000Z
Two cylindrical annuli of uranium metal were assembled to delayed criticality in 1963 with beryllium metal in the center to study the effects of beryllium to provide data for verification of neutron transport theory methods including cross section data for criticality safety calculations. These systems were assembled on a vertical assembly machine in the East cell of the Oak Ridge Critical Experiments Facility. The annuli was divided into two halves with the upper fixed half supported by a 0.010-in-thick, 30-in-diam stainless steel (type 304) diaphragm. The lower half which was hydraulically movable was supported on a very low mass tower consisting of mainly three 0.125-in-thick vertical pieces 120{degree} apart. These systems, when assembled to delayed criticality, were located in 35 x 35 x 30 ft. high experimental room, 11.7 ft from the 5-ft-thick West wall, 12.7 ft. from the 2-ft-thick North wall and 9.2 ft. above the concrete floor. When assembled the positive reactor period measured was +403 sec for the nominal 15-in-OD assembly and +31 sec for nominal 13-in-OD assembly. The reactivity effects of nearby materials such as the support ring (+) for the diaphragm, the diaphragm ({minus}) and the lower support stand(+) were evaluated. The total reactivity worths of the nearby support materials were 8.9 and 5.4 cents for the 15-in-OD and 13-in-OD assemblies, respectively. The reactivity effect of each of the components was measured for the nominal 13-in-OD assembly and they were {minus}11.2 cents for the diaphragm, +4.4 cents for the support ring, and +12.2 cents for the support stand.
Tubing carried perforating gun with insulation jacket
Donovan, J.F.; Yates, D.N.
1991-05-21T23:59:59.000Z
This patent describes a method of insulating a tubing carried perforating gun which is run through a subterranean wellbore. It includes making up at the well surface a tubing string for introduction within the well, the tubing string carrying a perforating gun assembly.
High power laser perforating tools and systems
Zediker, Mark S; Rinzler, Charles C; Faircloth, Brian O; Koblick, Yeshaya; Moxley, Joel F
2014-04-22T23:59:59.000Z
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.
Hildebrand, Richard J. (Edgemere, MD); Wozniak, John J. (Columbia, MD)
2001-01-01T23:59:59.000Z
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.
Zeghib, Abdelghani
Dynamics on Lorentz manifolds Abdelghani Zeghib Introduction Motivations and questions Examples Results Results Previous results Linear Dynamics General considerations Furstenberg Lemma Lorentz Dynamics://www.umpa.ens-lyon.fr/~zeghib/ (joint work with Paolo Piccione) #12;Dynamics on Lorentz manifolds Abdelghani Zeghib Introduction
Perforation of thin unreinforced concrete slabs
Cargile, J.D. [Army Engineer Waterways Experiment Station, Vicksburg, MS (United States); Giltrud, M.E. [Defense Nuclear Agency, Washington, DC (United States); Luk, V.K. [Sandia National Labs., Albuquerque, NM (United States)
1993-10-01T23:59:59.000Z
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.
Einstein manifolds with skew torsion
Ilka Agricola; Ana Cristina Ferreira
2013-02-15T23:59:59.000Z
This paper is devoted to the first systematic investigation of manifolds that are Einstein for a connection with skew symmetric torsion. We derive the Einstein equation from a variational principle and prove that, for parallel torsion, any Einstein manifold with skew torsion has constant scalar curvature; and if it is complete of positive scalar curvature, it is necessarily compact and it has finite first fundamental group. The longest part of the paper is devoted to the systematic construction of large families of examples. We discuss when a Riemannian Einstein manifold can be Einstein with skew torsion. We give examples of almost Hermitian, almost metric contact, and G2 manifolds that are Einstein with skew torsion. For example, we prove that any Einstein-Sasaki manifold and any 7-dimensional 3-Sasakian manifolds admit deformations into an Einstein metric with parallel skew torsion.
Pressure enhanced penetration with shaped charge perforators
Glenn, Lewis A. (Danville, CA)
2001-01-01T23:59:59.000Z
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.
Method and apparatus for selective retraction of a tubing carried perforating gun
Rubbo, R.P.
1990-12-25T23:59:59.000Z
This patent describes apparatus for telescopically retracting a subterranean well tubing carried perforating gun.
Poincare's Conjecture for three manifolds
G. S. Makanin
2007-11-23T23:59:59.000Z
We prove Poincare's Conjecture that every simply connected, closed three-manifold is topologically equivalent to the three-sphere. The proof is founded on the algebraic formulation discovered by J. Stallings.
Evaluation of Perforated Carbonate Cores Under Acid Stimulation
Diaz, Nerwing Jose
2011-10-21T23:59:59.000Z
Although it has been shown that clean perforation tunnels facilitate the evolution of a single, deeper-penetrating wormhole, there are no reported applications of reactive shaped charges in carbonates prior to acid stimulation. The present study...
Impact perforation of monolithic polyethylene plates: projectile nose shape dependence
Mohagheghian, I.; McShane, G. J.; Stronge, W. J.
2015-02-12T23:59:59.000Z
. The perforation mechanisms and energy absorption of these PE plates are contrasted with those of thin aluminium alloy targets that have the same total mass. UHMWPE outperforms these metallic targets for all three projectile nose shapes. Finally, the influence...
Simplicial isotopies in 3-manifolds
O'Donnell, Daniel Francis
1974-01-01T23:59:59.000Z
SIMPLICIAL ISOTOPIES IN 3-MANIFOLDS A Thesis DANIEL FRANCIS O'OONNELL Submitted to the Graduate College of Texas A&fl Uniuersity in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE August, 1974 Major Subject...: Mathematics SIMPLICIAL ISOTOPIES IN 3-MANIFOLDS A Thesis by DANIEL FRANCIS O'DONNELL Approved as to style and content by: (Chairman of Committee) (Head of (Member) (Member) August 1974 ABSTRACT Simplicial Isotopies in 3-Mani folds. (August 1974...
Finding Transition Pathways on Manifolds
Tiejun Li; Xiaoguang Li; Xiang Zhou
2014-08-13T23:59:59.000Z
We consider noise-induced transition paths in randomly perturbed dynami- cal systems on a smooth manifold. The classical Freidlin-Wentzell large devia- tion theory in Euclidean spaces is generalized and new forms of action functionals are derived in the spaces of functions and the space of curves to accommodate the intrinsic constraints associated with the manifold. Numerical meth- ods are proposed to compute the minimum action paths for the systems with constraints. The examples of conformational transition paths for a single and double rod molecules arising in polymer science are numerically investigated.
Characterization of cardiac lead perforation risk via a dynamic simulated environment
Rosario, Matthew J
2012-01-01T23:59:59.000Z
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 ...
Tubing pressurized firing apparatus for a tubing conveyed perforating gun
Davies, D. L.
1985-11-26T23:59:59.000Z
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.
Efficiency of perforated breakwater and associated energy dissipation
Ariyarathne, Hanchapola Appuhamilage
2009-05-15T23:59:59.000Z
The flow field behavior in the vicinity of a perforated breakwater and the efficiency of the breakwater under regular waves were studied. To examine the efficiency of the structure thirteen types of regular wave conditions with wave periods T = 1, 1...
Efficiency of perforated breakwater and associated energy dissipation
Ariyarathne, Hanchapola Appuhamilage
2008-10-10T23:59:59.000Z
The flow field behavior in the vicinity of a perforated breakwater and the efficiency of the breakwater under regular waves were studied. To examine the efficiency of the structure thirteen types of regular wave conditions with wave periods T = 1, 1...
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.
1997-03-25T23:59:59.000Z
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
2014-11-20T23:59:59.000Z
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.
Simplicial isotopies in 3-manifolds
O'Donnell, Daniel Francis
1974-01-01T23:59:59.000Z
by Treybig [6] of a theorem by Moise [3]. To prove it, we need the following lemma and theorem. Lemma 3. 1. Let P be a polyhedral 2-sphere and let L (u) p be a family of planes in E normal to a given unit vector u so that (a) the vertices of P are a.... E. E. MOise, Affine structures in 3-manifoMs. II. Positional properties of 2-spheres, Ann. of Math. 55(1952), 172 - 176. 4. D. E. Sanderson, Isotopy in 3-manifolds. I. Isotopic deform- mations of 2-cells and 3-cells, Proc. Amer. Math. Soc. 8...
Tenenbaum, Josh
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, J.B.
1994-03-29T23:59:59.000Z
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.
Perforated plates for cryogenic regenerators and method of fabrication
Hendricks, John B. (Huntsville, AL)
1994-01-01T23:59:59.000Z
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.
Optimal Transportation on Sub-Riemannian Manifolds
Rifford, Ludovic
Optimal Transportation on Sub-Riemannian Manifolds Ludovic Rifford UniversitÂ´e de Nice - Sophia Antipolis (Joint work with A. Figalli) Ludovic Rifford Optimal Transportation on Sub-Riemannian Manifolds #12;Monge's Optimal Transportation Problem Let M be a separable metric space equipped with its Borel
Optimal Transportation on Sub-Riemannian Manifolds
Rifford, Ludovic
Optimal Transportation on Sub-Riemannian Manifolds Ludovic Rifford UniversitÂ´e de Nice - Sophia Antipolis (Joint work with A. Figalli) Ludovic Rifford Optimal Transportation on Sub-Riemannian Manifolds #12;Outline I. Statement of our optimal transportation problem II. Sketch of proof of the Mc
Magnetic Resonance Imaging (MRI) of PEM Dehydration and Gas Manifold...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Resonance Imaging (MRI) of PEM Dehydration and Gas Manifold Flooding During Continuous Fuel Cell Operation. Magnetic Resonance Imaging (MRI) of PEM Dehydration and Gas Manifold...
Heterotic Model Building: 16 Special Manifolds
Yang-Hui He; Seung-Joo Lee; Andre Lukas; Chuang Sun
2014-05-13T23:59:59.000Z
We study heterotic model building on 16 specific Calabi-Yau manifolds constructed as hypersurfaces in toric four-folds. These 16 manifolds are the only ones among the more than half a billion manifolds in the Kreuzer-Skarke list with a non-trivial first fundamental group. We classify the line bundle models on these manifolds, both for SU(5) and SO(10) GUTs, which lead to consistent supersymmetric string vacua and have three chiral families. A total of about 29000 models is found, most of them corresponding to SO(10) GUTs. These models constitute a starting point for detailed heterotic model building on Calabi-Yau manifolds in the Kreuzer-Skarke list. The data for these models can be downloaded here: http://www-thphys.physics.ox.ac.uk/projects/CalabiYau/toricdata/index.html
Cottle, John Ernest
1948-01-01T23:59:59.000Z
of the question. Other difficulties encountered. in the use of large packed columns are the tendeno1es of the liquid to channel through the paoking and. of the packing to break down under high operating temperatures. Hubble cap plate columns are the most...- oulty in a perforated. plate column than in any other types' and. should oleaning 'be necessary it could, be aocomplished much more easily. It is also believed that high plate efficienoies could be o'btained with per- i'orated plates 'beoause...
Mechanical seal having a single-piece, perforated mating ring
Khonsari, Michael M. (Baton Rouge, LA); Somanchi, Anoop K. (Fremont, CA)
2007-08-07T23:59:59.000Z
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.
Gauge Theories in Noncommutative Homogeneous Kähler Manifolds
Yoshiaki Maeda; Akifumi Sako; Toshiya Suzuki; Hiroshi Umetsu
2014-09-07T23:59:59.000Z
We construct a gauge theory on a noncommutative homogeneous K\\"ahler manifold, where we employ the deformation quantization with separation of variables for K\\"ahler manifolds formulated by Karabegov. A key point in this construction is to obtaining vector fields which act as inner derivations for the deformation quantization. We show that these vector fields are the only Killing vector fields. We give an explicit construction of this gauge theory on noncommutative ${\\mathbb C}P^N$ and noncommutative ${\\mathbb C}H^N$.
SUSY gauge theory on graded manifolds
G. Sardanashvily; W. Wachowski
2014-06-24T23:59:59.000Z
Lagrangian classical field theory of even and odd fields is adequately formulated in terms of fibre bundles and graded manifolds. In particular, conventional Yang-Mills gauge theory is theory of connections on smooth principal bundles, but its BRST extension involves odd ghost fields an antifields on graded manifolds. Here, we formulate Yang-Mills theory of Grassmann-graded gauge fields associated to Lie superalgebras on principal graded bundles. A problem lies in a geometric definition of odd gauge fields. Our goal is Yang--Mills theory of graded gauge fields and its BRST extension.
MATH 132: TOPOLOGY II: SMOOTH MANIFOLDS ANDREW COTTON-CLAY
Cotton-Clay, Andrew
MATH 132: TOPOLOGY II: SMOOTH MANIFOLDS ANDREW COTTON-CLAY 1. Introduction My Name: Andrew Cotton-Clay
Numerical simulations of perforated plate stabilized premixed flames with detailed chemistry
Kedia, Kushal Sharad
2010-01-01T23:59:59.000Z
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 ...
AIP/123-QED Acoustic properties of plates with unevenly distributed macro perforations backed by
Paris-Sud XI, UniversitĂ© de
be a difficult task in practical acoustic engineering applications. Furthermore, drilling a large amount, the best performance for perforated panels is obtained for submillimetric holes. As recom- mended by Maa1
A study of the effects of casing perforations on the production rates of wells
Sanderlin, James Lewis
1958-01-01T23:59:59.000Z
Resistance Values Used to Sinulate Well Bore plus Perfo'rations ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ o ~ ~ ~ ~ ~ $2 III Resistance Values Neasured Using Electrolytic Tank and Conductivity Bridge . . . ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ IV Resistance Values for Plush Perforations 34... coetsat by: ~ ad of Defer ?t AuSest 1958 TRBUL OP CONTEIES introduction snd Review of Literature Materials and Iquipaent . Procedure 6 Electrolytic Tank Electrical dnaloS Model Results snd Discussion of Results 10 Conclusions . *cknowled...
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
Einstein Manifolds and Contact Geometry Charles P. Boyer Krzysztof Galicki
Einstein Manifolds and Contact Geometry Charles P. Boyer Krzysztof Galicki Abstract. We show that every KÂcontact Einstein manifold is SasakianÂEinstein and discuss several corollaries of this result. 1 types of Riemannian contact manifolds to construct Einstein metrics of positive scalar curvature
EMBEDDINGS IN GENERALIZED MANIFOLDS J. L. BRYANT AND W. MIO
Aluffi, Paolo
EMBEDDINGS IN GENERALIZED MANIFOLDS J. L. BRYANT AND W. MIO Abstract. We prove that a (2m \\Gamma n grant DMSÂ9626624. 1 #12; 2 J. L. BRYANT AND W. MIO theory, for removing intersections of manifoldsÂmanifold with the DDP , n â?? 5, could be approximated by embeddings [5]. Bryant [2] and Walsh [20] were able to establish
Manifold gasket accommodating differential movement of fuel cell stack
Kelley, Dana A. (New Milford, CT); Farooque, Mohammad (Danbury, CT)
2007-11-13T23:59:59.000Z
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.
Large-Scale Manifold Learning Ameet Talwalkar
California at Irvine, University of
Large-Scale Manifold Learning Ameet Talwalkar Courant Institute New York, NY ameet on spectral decom- position, we first analyze two approximate spectral decom- position techniques for large-dimensional embeddings for two large face datasets: CMU-PIE (35 thousand faces) and a web dataset (18 million faces). Our
DIRECT SEARCH METHODS OVER LIPSCHITZ MANIFOLDS 1 ...
2007-02-27T23:59:59.000Z
Page 1 ... (implicit) function theorem allows us to define a new problem on the tangent spaces of the manifold. .... modification to our algorithm in Procedure 2.1, though now the convergence analysis is done in TxM. .... First we'll concern ourselves with finding the implicit function ?(0, w). What ... The reason is, we don'
Collisions at infinity in hyperbolic manifolds
McReynolds, D B; Stover, Matthew
2012-01-01T23:59:59.000Z
For a complete, finite volume real hyperbolic n-manifold M, we investigate the map between homology of the cusps of M and the homology of $M$. Our main result provides a proof of a result required in a recent paper of Frigerio, Lafont, and Sisto.
Energy-momentum balance in particle - domain wall perforating collision
D. V. Gal'tsov; E. Yu. Melkumova; P. A. Spirin
2015-02-10T23:59:59.000Z
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.
Group manifold approach to higher spin theory
Hu, Shan
2015-01-01T23:59:59.000Z
We consider the group manifold approach to higher spin theory. The deformed higher spin transformation is realized as the diffeomorphism transformation on group manifold $\\textbf{M}$. With the suitable rheonomy condition and the torsion constraint imposed, the unfolded equation can be obtained from the Bianchi identity, by solving which, fields on $\\textbf{M}$ is determined by the multiplet at one point, or equivalently, by $(W^{[a(s-1),b(0)]}_{\\mu},H)$ on $AdS_{4}\\subset \\textbf{M}$. Although the space is extended to $\\textbf{M}$ to get the geometrical formulation, the dynamical degrees of freedom is still in $AdS_{4}$. We also discuss the theory with the global higher spin symmetry, which is in parallel with the WZ model in supersymmetry.
Connections on non-symmetric (generalized) Riemannian manifold and gravity
Ivanov, Stefan
2015-01-01T23:59:59.000Z
Connections with (skew-symmetric) torsion on non-symmetric Riemannian manifold satisfying the Einstein metricity condition (NGT with torsion) are considered. It is shown that an almost Hermitian manifold is an NGT with torsion if and only if it is a Nearly K\\"ahler manifold. In the case of an almost contact metric manifold the NGT with torsion spaces are characterized and a possibly new class of almost contact metric manifolds is extracted. Similar considerations lead to a definition of a particular classes of almost para-Hermitian and almost paracontact metric manifolds. The conditions are given in terms of the corresponding Nijenhuis tensors and the exterior derivative of the skew-symmetric part of the non-symmetric Riemannian metric.
Towards a double field theory on para-Hermitian manifolds
Vaisman, Izu [Department of Mathematics, University of Haifa, Haifa (Israel)] [Department of Mathematics, University of Haifa, Haifa (Israel)
2013-12-15T23:59:59.000Z
In a previous paper, we have shown that the geometry of double field theory has a natural interpretation on flat para-Kähler manifolds. In this paper, we show that the same geometric constructions can be made on any para-Hermitian manifold. The field is interpreted as a compatible (pseudo-)Riemannian metric. The tangent bundle of the manifold has a natural, metric-compatible bracket that extends the C-bracket of double field theory. In the para-Kähler case, this bracket is equal to the sum of the Courant brackets of the two Lagrangian foliations of the manifold. Then, we define a canonical connection and an action of the field that correspond to similar objects of double field theory. Another section is devoted to the Marsden-Weinstein reduction in double field theory on para-Hermitian manifolds. Finally, we give examples of fields on some well-known para-Hermitian manifolds.
The Yamabe equation on complete manifolds with finite volume
Große, Nadine
2011-01-01T23:59:59.000Z
We prove the existence of a solution of the Yamabe equation on complete manifolds with finite volume and positive Yamabe invariant. In order to circumvent the standard methods on closed manifolds which heavily rely on global (compact) Sobolev embeddings we approximate the solution by eigenfunctions of certain conformal complete metrics. This also gives rise to a new proof of the well-known result for closed manifolds and positive Yamabe invariant.
The genus spectrum of a hyperbolic 3-manifold
McReynolds, D B
2009-01-01T23:59:59.000Z
In this article we study the spectrum of totally geodesic surfaces of a finite volume hyperbolic 3-manifold. We show that for arithmetic hyperbolic 3-manifolds that contain a totally geodesic surface, this spectrum determines the commensurability class. In addition, we show that any finite volume hyperbolic 3-manifold has many pairs of non-isometric finite covers with identical spectra. Forgetting multiplicities, we can also construct pairs where the volume ratio is unbounded.
Nonrelativistic hydrogen type stability problems on nonparabolic 3-manifolds
Batu Güneysu
2012-03-19T23:59:59.000Z
We extend classical Euclidean stability theorems corresponding to the nonrelativistic Hamiltonians of ions with one electron to the setting of non parabolic Riemannian 3-manifolds.
D-branes on group manifolds and fusion rings
P. Bouwknegt; P. Dawson; D. Ridout
2002-10-31T23:59:59.000Z
In this paper we compute the charge group for symmetry preserving D-branes on group manifolds for all simple, simply-connected, connected compact Lie groups G.
Engine Air Intake Manifold Having Built In Intercooler
Freese, V, Charles E. (Westland, MI)
2000-09-12T23:59:59.000Z
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.
audio localization manifold: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
Mathematical definition of quantum field theory on a manifold
A. V. Stoyanovsky
2009-11-21T23:59:59.000Z
We give a mathematical definition of quantum field theory on a manifold, and definition of quantization of a classical field theory given by a variational principle.
Optical manifold for light-emitting diodes
Chaves, Julio C.; Falicoff, Waqidi; Minano, Juan C.; Benitez, Pablo; Parkyn Jr., William A.; Alvarez, Roberto; Dross, Oliver
2008-06-03T23:59:59.000Z
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.
On the effect of perforated plates on the acoustics of annular combustors
Paris-Sud XI, Université de
On the effect of perforated plates on the acoustics of annular combustors E. Gullaud1 CERFACS], acoustic Helmholtz solvers can prove to be sufficient to compute the thermoacoustic modes of a combustor accuracy of these computations, the whole complex geometry of the combustor, including the combustion
On the effect of perforated plates on the acoustics of annular combustors
Nicoud, Franck
On the effect of perforated plates on the acoustics of annular combustors E. Gullaud1 CERFACS [9, 10], the thermoacoustic modes of a combustor can be computed more 3 #12;efficiently by using to account for the complex geometry of the combustor, including the combustion chamber, casing, swirlers
A construction of a nonparametric quantum information manifold
Anna Jencova
2005-11-21T23:59:59.000Z
We present a construction of a Banach manifold on the set of faithful normal states of a von Neumann algebra, where the underlying Banach space is a quantum analogue of an Orlicz space. On the manifold, we introduce the exponential and mixture connections as dual pair of affine connections.
Manifold to uniformly distribute a solid-liquid slurry
Kern, Kenneth C. (Lake Hiawatha, NJ)
1983-01-01T23:59:59.000Z
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.
Einstein manifolds with convex boundaries JeanMarc Schlenker \\Lambda
Schlenker, Jean-Marc
Einstein manifolds with convex boundaries JeanÂMarc Schlenker \\Lambda February 2, 1999 Abstract Let (M; @M) be a compact m+1Âmanifold with boundary with an Einstein metric g 0 , with ric g0 = \\Gammamg metric on @M . Then any metric close enough to h 0 is induced on @M by an Einstein metric g with ric g
Einstein manifolds with convex boundaries Jean-Marc Schlenker*
Schlenker, Jean-Marc
Einstein manifolds with convex boundaries Jean Let (M, @M) be a compact m+1-manifold with boundary with an Einstein me* *tric g0, with ricg0 be the induced metric on @M. Then any metric close e* *nough to h0 is induced on @M by an Einstein metric g
EMBEDDINGS IN GENERALIZED MANIFOLDS J. L. BRYANT AND W. MIO
Mio, Washington
EMBEDDINGS IN GENERALIZED MANIFOLDS J. L. BRYANT AND W. MIO Abstract. We prove that a (2m \\Gamma n supported by NSF grant DMSÂ9626624. 1 #12; 2 J. L. BRYANT AND W. MIO specifically, we establish analoguesÂmanifold with the DDP , n â?? 5, could be approximated by embeddings [5]. Bryant [2] and Walsh [20] were able to establish
EMBEDDINGS IN GENERALIZED MANIFOLDS J. L. BRYANT AND W. MIO
Mio, Washington
EMBEDDINGS IN GENERALIZED MANIFOLDS J. L. BRYANT AND W. MIO Abstract. We prove that a 2m,n+1 manifolds,embeddings. Partially supported by NSF grant DMS-9626624. 1 #12;2 J. L. BRYANT AND W. MIO speci . Bryant 2 and Walsh 20 were able to establish general position theorems for maps of arbitrary polyhedra
G 2 MANIFOLDS WITH PARALLEL CHARACTERISTIC TORSION THOMAS FRIEDRICH
Friedrich, Thomas
these spaces admit a metric connec tion # c with totally skewsymmetric torsion and a spinor field #1 solvingG 2 MANIFOLDS WITH PARALLEL CHARACTERISTIC TORSION THOMAS FRIEDRICH Abstract. We classify 7dimensional cocalibrated G2manifolds with parallel char acteristic torsion and nonabelian holonomy. All
Interference evaluation between manifold and wet Christmas tree CP systems
Brasil, S.L.D.C.; Baptista, W.
2000-05-01T23:59:59.000Z
Offshore production wells are controlled by valves installed in the marine soil, called wet Christmas trees (WCTs). A manifold receives the production of several wells and transports it to the platform. The manifold is cathodically protected by Al anodes and the WCT by Zn anodes. A computer simulation was carried out to evaluate the interference between the equipment cathodic protection systems.
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
Rough Solutions of the Einstein Constraints on Closed Manifolds without Near-CMC Conditions
Holst, Michael; Nagy, Gabriel; Tsogtgerel, Gantumur
2009-01-01T23:59:59.000Z
global) sub- and super-solution constructions for closed manifolds; analogous constructions for compactof compact manifolds with boundary. Lemma 7 (Global super-
Instantons on sine-cones over Sasakian manifolds
Severin Bunk; Tatiana A. Ivanova; Olaf Lechtenfeld; Alexander D. Popov; Marcus Sperling
2014-07-10T23:59:59.000Z
We investigate instantons on sine-cones over Sasaki-Einstein and 3-Sasakian manifolds. It is shown that these conical Einstein manifolds are K"ahler with torsion (KT) manifolds admitting Hermitian connections with totally antisymmetric torsion. Furthermore, a deformation of the metric on the sine-cone over 3-Sasakian manifolds allows one to introduce a hyper-K"ahler with torsion (HKT) structure. In the large-volume limit these KT and HKT spaces become Calabi-Yau and hyper-K"ahler conifolds, respectively. We construct gauge connections on complex vector bundles over conical KT and HKT manifolds which solve the instanton equations for Yang-Mills fields in higher dimensions.
Dual manifold system and method for fluid transfer
Doktycz, Mitchel J. (Knoxville, TN); Bryan, William Louis (Knoxville, TN); Kress, Reid (Oak Ridge, TN)
2003-05-27T23:59:59.000Z
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
2003-09-30T23:59:59.000Z
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.
Dranchenko, B.N.; Portnov, B.B.; Seleznev, A.V.; Danilova, T.N.; Komarova, S.N.; Ponomareva, V.K.
1994-06-01T23:59:59.000Z
Cylindrical shells with regular perforation are widely used in power generating equipment and in particular in collectors 1 of the circuit of steam generators of power generating installations with water-water reactors (WWPR) The state of stress of collectors is determined by a broad spectrum of technological and operational loads, it is therefore difficult to analyze it theoretically. The aim of the present work is the experimental investigation of stresses in the cylindrical shells of collectors subjected to internal pressure, the generalization and systematization of empirical data in the form of engineering formulas and nomographs. The investigations were carried out with photoelastic three-dimensional models with the use of {open_quotes}freezing{close_quotes}. The basic characteristics of the state of stress of perforated shells (in particular those used in calculations of the strength and life of collectors) are the values of the stress intensity factor K and of the stress intensification factor {gamma}{sub {bar {sigma}}}{sub me} of the mean integral stress level in the neck between neighboring holes. The presented data make it possible to establish quantitatively the regularities of change of K and {gamma}{sub {bar {sigma}}}{sub me} in dependence on the geometry of the perforated shells. These data were systematized according to a special program of multifactor regression analysis. It follows from the presented formulas and nomographs in particular that in the ranges of the geometry of the perforated shells K may change from 2.5 to 4.0, and {gamma}{sub {bar {sigma}}}{sub me} from 1.1 to 2.3. Therefore varied geometric parameters have a substantial effect on the load intensity of perforated shells, and that once again confirms how topical it is to obtain new experimental data, to generalize and systematize them.
Manifold corrections on spinning compact binaries
Zhong Shuangying; Wu Xin [Nanchang University, Nanchang 330031 (China)
2010-05-15T23:59:59.000Z
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.
Geometric solitons of Hamiltonian flows on manifolds
Song, Chong, E-mail: songchong@xmu.edu.cn [School of Mathematical Sciences, Xiamen University, Xiamen 361005 (China)] [School of Mathematical Sciences, Xiamen University, Xiamen 361005 (China); Sun, Xiaowei, E-mail: sunxw@cufe.edu.cn [School of Applied Mathematics, Central University of Finance and Economics, Beijing 100081 (China)] [School of Applied Mathematics, Central University of Finance and Economics, Beijing 100081 (China); Wang, Youde, E-mail: wyd@math.ac.cn [Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190 (China)] [Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190 (China)
2013-12-15T23:59:59.000Z
It is well-known that the LIE (Locally Induction Equation) admit soliton-type solutions and same soliton solutions arise from different and apparently irrelevant physical models. By comparing the solitons of LIE and Killing magnetic geodesics, we observe that these solitons are essentially decided by two families of isometries of the domain and the target space, respectively. With this insight, we propose the new concept of geometric solitons of Hamiltonian flows on manifolds, such as geometric Schrödinger flows and KdV flows for maps. Moreover, we give several examples of geometric solitons of the Schrödinger flow and geometric KdV flow, including magnetic curves as geometric Schrödinger solitons and explicit geometric KdV solitons on surfaces of revolution.
Acharya, Jyotsna, E-mail: jyoacharya@yahoo.com; Bancroft, Karen; Lay, James [Royal Bolton Hospital (United Kingdom)
2012-12-15T23:59:59.000Z
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.
Computation of Slow Invariant Manifolds for Hydrogen-Air Systems
· Summary #12;Introduction Motivation and background · Detailed kinetics are essential for accurate modeling systems · ILDM, CSP, and ICE-PIC are approximations of the reaction slow invariant manifold. · MEPT
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
2009-01-01T23:59:59.000Z
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
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
2009-01-01T23:59:59.000Z
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.
GEOMETRY OF KAHLER MANIFOLDS AND THE HODGE LAPLACIAN ON MINIMAL
Boyer, Edmond
of a spin manifold M to a spin submanifold is a Hermitian bun- dle given by the tensorial product the intrinsic spin bun- dle of the hypersurface and the induced Dirac operator is the intrinsic classical Dirac
SPLITTING MANIFOLD APPROXIMATE FIBRATIONS J. L. BRYANT AND P. KIRBY
Aluffi, Paolo
SPLITTING MANIFOLD APPROXIMATE FIBRATIONS J. L. BRYANT AND P. KIRBY Abstract. Suppose M, embeddings. Partially supported by NSF grant DMS-9626624. 1 #12; 2 J. L. BRYANT AND P. KIRBY 2. Definitions
Learning manifolds with k-means and k-flats
Canas, Guillermo D.
We study the problem of estimating a manifold from random samples. In particular, we consider piecewise constant and piecewise linear estimators induced by k-means and k-?ats, and analyze their performance. We extend ...
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
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
Instantons on the exceptional holonomy manifolds of Bryant and Salamon
Andrew Clarke
2014-04-15T23:59:59.000Z
We give a construction of $G_2$ and $Spin(7)$ instantons on exceptional holonomy manifolds constructed by Bryant and Salamon, by using an ansatz of spherical symmetry coming from the manifolds being the total spaces of rank-4 vector bundles. In the $G_2$ case, we show that, in the asymptotically conical model, the connections are asymptotic to Hermitian Yang-Mills connections on the nearly K\\"ahler $S^3\\times S^3$.
Covariant Star Product for Exterior Differential Forms on Symplectic Manifolds
McCurdy, Shannon; Zumino, Bruno [Physics Department, University of California, Berkeley, CA 94720-7300 (United States); Theoretical Physics Group, Lawrence Berkeley Laboratory, Berkeley, CA 947208162 (United States)
2010-02-10T23:59:59.000Z
After a brief description of the Z-graded differential Poisson algebra, we introduce a covariant star product for exterior differential forms and give an explicit expression for it up to second order in the deformation parameter h, in the case of symplectic manifolds. The graded differential Poisson algebra endows the manifold with a connection, not necessarily torsion-free, and places upon the connection various constraints.
Distributed mean curvature on a discrete manifold for Regge calculus
Rory Conboye; Warner A. Miller; Shannon Ray
2015-02-26T23:59:59.000Z
The integrated mean curvature of a simplicial manifold is well understood in both Regge Calculus and Discrete Differential Geometry. However, a well motivated pointwise definition of curvature requires a careful choice of volume over which to uniformly distribute the local integrated curvature. We show that hybrid cells formed using both the simplicial lattice and its circumcentric dual emerge as a remarkably natural structure for the distribution of this local integrated curvature. These hybrid cells form a complete tessellation of the simplicial manifold, contain a geometric orthonormal basis, and are also shown to give a pointwise mean curvature with a natural interpretation as a fractional rate of change of the normal vector.
Self-dual metrics on toric 4-manifolds: extending the Joyce construction
Griffiths, Hugh Norman
2009-01-01T23:59:59.000Z
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 ...
First laboratory perforating tests in coal show lower-than-expected penetration
Snider, P.M.; Walton, I.C.; Skinner, T.K.; Atwood, D.C.; Grove, B.M.; Graham, C.
2008-06-15T23:59:59.000Z
Worldwide Coal Bed Methane (CBM) resources are huge, estimated at 3,000 to 9,000 Tcf. The production rate from CBM reservoirs is low, perhaps 50-100 mcf/day. Various completion methods are being evaluated and new technologies are being developed with the aim of increasing production rates. Considering this interest and activity level, little attention has been paid to the CBM completion fundamentals. Perforating is a critical part of this process, especially considering the PRB development migration from single-coal, open-hole completions into multi-zone, cased-hole completions. This paper describes the first known laboratory-testing program to investigate shaped charge penetration in coal targets. We describe mechanical properties of the coals tested, and penetration results for different shaped charges (of different designs), shot at various stress conditions. CT scan and cutaway imaging of the perforation tunnels are also discussed. Tests were conducted under dry and saturated conditions. The preliminary experiments reported here indicate that shaped charge penetration in coal is significantly less than expected, considering the target's density and strength. The authors provide insight into what may be the reasons for these unexpected results and recommend a path forward for shaped charge testing, designs, predictive tools, and how to optimize CBM completions.
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 jetextension 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
White noise analysis on manifolds and the energy representation of a gauge group
Takahiro Hasebe
2011-01-15T23:59:59.000Z
The energy representation of a gauge group on a Riemannian manifold has been discussed by several authors. Y. Shimada has shown the irreducibility for compact Riemannian manifold, using white noise analysis. In this paper we extend its technique to noncompact Riemannian manifolds which have differential operators satisfying some conditions.
Manifold Homotopy via the Flow Complex Bardia Sadri
Toronto, University of
modeling though much of the mathematical foundations behind the flow complex were well-explored priorManifold Homotopy via the Flow Complex Bardia Sadri Abstract It is known that the critical points versus those of deep critical points, in a filtration of the flow complex based on the distance
Clay Mathematics Proceedings Kahler-Ricci flow on complete manifolds
Ni, Lei
Clay Mathematics Proceedings K¨ahler-Ricci flow on complete manifolds Lei Ni Abstract. This is a paper based on author's lectures delivered at the 2005 Clay Mathematics Institute summer school at MSRI The 2005 Clay Mathematics Institute summer school at MSRI focused on Perel- man's work on Ricci flow
Geodesic Regression on Riemannian Manifolds P. Thomas Fletcher
Boyer, Edmond
- ing multiple linear regression in Rn . Here we are interested in the relationship between a non that one could choose, and it provides a direct generalization of linear regression to the manifold setting regression model is linear regression, due to its simplicity, ease of interpretation, and ability to model
An implicit trust-region method on Riemannian manifolds§
2007-06-06T23:59:59.000Z
Jun 6, 2007 ... described in terms of optimizing a smooth function on a manifold (e.g., the eigen- value problem .... Use CG recurrences to update residual and search direction. 21: Set rj+1 = rj .... only once and never re-enter it. However, for ...
nlin.PS/0201047 Unstable manifolds and Schrodinger dynamics
Schroers, Bernd J.
, United Kingdom January 2002 Abstract The time evolution of several interacting Ginzburg-Landau vortices to the unit circle in C . It therefore has an associated integer winding number or degree, which can of the Ginzburg-Landau energy functional. For two vortices the relevant un- stable manifold is constructed
Protein clustering on a Grassmann manifold Chendra Hadi Suryanto1
Fukui, Kazuhiro
of the protein. The similarity of two protein structures is then defined by the canonical angles between outperforms the k-means clustering with Gauss Integrals Tuned, which is a state-of- the-art descriptor manifold, Gauss Integrals 1 Introduction Since there are numerous proteins whose functions are yet
university-logo Complete affine 3-manifolds and hyperbolic
Goldman, William
university-logo Complete affine 3-manifolds and hyperbolic surfaces Dedicated to Bill Thurston and hyperbolic surfaces #12;university-logo Three-dimensional affine space forms When can a group G act;university-logo Three-dimensional affine space forms When can a group G act on Euclidean space with quotient
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
Paris-Sud XI, Université de
on the transformation kinetics of TRIP and dual phase steels has been analyzed by many researchers, for example Al are responsible for the deformation pro cess taking place in TRIP steels during and after the phase transforThermo-mechanical behaviour of TRIP 1000 steel sheets subjected to low velocity perforation
Peirce, Anthony
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 shadowing" that refers to suppression of some hydraulic fractures by the compressive stresses exerted
Vladimir Maz'ya; Alexander Movchan; Michael Nieves
2010-05-24T23:59:59.000Z
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.
Almost Einstein and Poincare-Einstein manifolds in Riemannian signature
A. Rod Gover
2008-03-25T23:59:59.000Z
An almost Einstein manifold satisfies equations which are a slight weakening of the Einstein equations; Einstein metrics, Poincare-Einstein metrics, and compactifications of certain Ricci-flat asymptotically locally Euclidean structures are special cases. The governing equation is a conformally invariant overdetermined PDE on a function. Away from the zeros of this the almost Einstein structure is Einstein, while the zero set gives a scale singularity set which may be viewed as a conformal infinity for the Einstein metric. In this article we give a classification of the possible scale singularity spaces and derive geometric results which explicitly relate the intrinsic conformal geometry of these to the conformal structure of the ambient almost Einstein manifold. Classes of examples are constructed. A compatible generalisation of the constant scalar curvature condition is also developed. This includes almost Einstein as a special case, and when its curvature is suitably negative, is closely linked to the notion of an asymptotically hyperbolic structure.
Fuel cell stack with internal manifolds for reactant gases
Schnacke, Arthur W. (Schenectady, NY)
1985-01-01T23:59:59.000Z
A fuel cell stack includes a plurality of plate-like fuel cells arranged along an axis generally parallel to cell thickness with electrically conductive separator plates between each pair of cells. A plurality of axial manifolds are provided at opposite sides of the stack in outer marginal portions beyond the edges of electrodes and electrolyte tiles. Sealing rings prevent cross-leakage of oxidant fuel gases through use of pairs of outwardly extending lips from opposite tile surfaces bonded to first and second electrode frames respectively. The frames provide transition between electrode edges and manifold perimeters. The pairs of extension lips are sealingly bonded together through an electrically insulative sealing ring with wedge shaped fastening members.
Fuel cell stack with internal manifolds for reactant gases
Schnacke, A.W.
1983-10-12T23:59:59.000Z
A fuel cell stack includes a plurality of plate-like fuel cells arranged along an axis generally parallel to cell thickness with electrically conductive separator plates between each pair of cells. A plurality of axial manifolds are provided at opposite sides of the stack in outer marginal portions beyond the edges of electrodes and electrolyte tiles. Sealing rings prevent cross-leakage of oxidant fuel gases through use of pairs of outwardly extending lips from opposite tile surfaces bonded to first and second electrode frames respectively. The frames provide transition between electrode edges and manifold perimeters. The pairs of extension lips are sealingly bonded together through an electrically insulative sealing ring with wedge shaped fastening members.
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
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
Monopoles on the Bryant-Salamon $G_2$ Manifolds
Goncalo Oliveira
2014-11-06T23:59:59.000Z
$G_2$-Monopoles are solutions to gauge theoretical equations on noncompact $7$-manifolds of $G_2$ holonomy. We shall study this equation on the $3$ Bryant-Salamon manifolds. We construct examples of $G_2$-monopoles on two of these manifolds, namely the total space of the bundle of anti-self-dual two forms over the $\\mathbb{S}^4$ and $\\mathbb{CP}^2$. These are the first nontrivial examples of $G_2$-monopoles. Associated with each monopole there is a parameter $m \\in \\mathbb{R}^+$, known as the mass of the monopole. We prove that under a symmetry assumption, for each given $m \\in \\mathbb{R}^+$ there is a unique monopole with mass $m$. We also find explicit irreducible $G_2$-instantons on $\\Lambda^2_-(\\mathbb{S}^4)$ and on $\\Lambda^2_-(\\mathbb{CP}^2)$. The third Bryant-Salamon $G_2$-metric lives on the spinor bundle over the $3$-sphere. In this case we produce a vanishing theorem for monopoles.
An upper bound for a Hilbert polynomial on quaternionic K"ahler manifolds
Weingart, Gregor
manifold (M, g) * *with holon- omy contained in Sp(1) . Sp(n). Associated with M is the twistor space Z
Quantum error correcting codes and 4-dimensional arithmetic hyperbolic manifolds
Guth, Larry, E-mail: lguth@math.mit.edu [Department of Mathematics, MIT, Cambridge, Massachusetts 02139 (United States); Lubotzky, Alexander, E-mail: alex.lubotzky@mail.huji.ac.il [Institute of Mathematics, Hebrew University, Jerusalem 91904 (Israel)
2014-08-15T23:59:59.000Z
Using 4-dimensional arithmetic hyperbolic manifolds, we construct some new homological quantum error correcting codes. They are low density parity check codes with linear rate and distance n{sup ?}. Their rate is evaluated via Euler characteristic arguments and their distance using Z{sub 2}-systolic geometry. This construction answers a question of Zémor [“On Cayley graphs, surface codes, and the limits of homological coding for quantum error correction,” in Proceedings of Second International Workshop on Coding and Cryptology (IWCC), Lecture Notes in Computer Science Vol. 5557 (2009), pp. 259–273], who asked whether homological codes with such parameters could exist at all.
The Bryant-Salamon G_2 manifolds and hypersurface geometry
Reiko Miyaoka
2006-06-02T23:59:59.000Z
We show that two of the Bryant-Salamon G_2-manifolds have a simple topology ; homeomorphic to the complement of some submanifolds of the 7-dimensional sphere. In this connection, we show there exists a complete Ricci-flat (non-flat) metric on the complement of an m-dimensional sphere in an n-dimensional sphere for some n-1>m. We also give many examples of special Lagrangian submanifolds of the cotangent bundle of the sphere with the Stenzel metric. Hypersurface geometry is essential in the argument.
Convergence and Rate of Convergence of A Manifold-Based Dimension Reduction Algorithm
Zha, Hongyuan
of a local manifold learning algorithm: LTSA [13]. The main technical tool is the perturbation analysis some asymptotic properties of a local manifold learning algorithm: LTSA [13], as well as a demonstration of some of its limitations. The key idea in the analysis is to treat the solutions computed
DESINGULARIZING HOMOLOGY MANIFOLDS J. BRYANT, S. FERRY, W. MIO, AND S. WEINBERGER
Mio, Washington
DESINGULARIZING HOMOLOGY MANIFOLDS J. BRYANT, S. FERRY, W. MIO, AND S. WEINBERGER Abstract. We Date: August 24, 2005. Bryant and Mio were partially supported by NSF grants DMS-0071693 and DMS supported by NSF grant DMS-9803633. 1 #12;2 J. BRYANT, S. FERRY, W. MIO, AND S. WEINBERGER manifolds
THE CO-STABILITY MANIFOLD OF A TRIANGULATED CATEGORY PETER JRGENSEN AND DAVID PAUKSZTELLO
JĂ¸rgensen, Peter
THE CO-STABILITY MANIFOLD OF A TRIANGULATED CATEGORY PETER JĂ?RGENSEN AND DAVID PAUKSZTELLO Abstract co-stability conditions as a `continuous' generalisation of co-t-structures. Our main result is that the set of nice co-stability conditions on a triangulated category is a manifold. In particular, we show
THE FBI TRANSFORM ON COMPACT C 1 MANIFOLDS JARED WUNSCH AND MACIEJ ZWORSKI
Zworski, Maciej
THE FBI TRANSFORM ON COMPACT C 1 MANIFOLDS JARED WUNSCH AND MACIEJ ZWORSKI 1. Introduction In this paper we discuss the Fourier-Bros-Iagolnitzer (FBI) transform on smooth, boundaryless manifolds-compactness of the cotangent bundle. By reviewing the basic constructions of the FBI transform theory, we hope to make
Model building with intersecting D6-branes on smooth Calabi-Yau manifolds
Eran Palti
2009-02-20T23:59:59.000Z
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.
Resolvent estimates and local decay of waves on conic manifolds
Dean Baskin; Jared Wunsch
2012-10-01T23:59:59.000Z
We consider manifolds with conic singularites that are isometric to $\\mathbb{R}^{n}$ outside a compact set. Under natural geometric assumptions on the cone points, we prove the existence of a logarithmic resonance-free region for the cut-off resolvent. The estimate also applies to the exterior domains of non-trapping polygons via a doubling process. The proof of the resolvent estimate relies on the propagation of singularities theorems of Melrose and the second author to establish a "very weak" Huygens' principle, which may be of independent interest. As applications of the estimate, we obtain a exponential local energy decay and a resonance wave expansion in odd dimensions, as well as a lossless local smoothing estimate for the Schr{\\"o}dinger equation.
High-Dimensional Data Fusion via Joint Manifold Learning Mark A. Davenport,s
that acquire large amounts of very high-dimensional data. To cope with such a data deluge, manifold models number of vantage points and using multiple modalities. This can lead to a veritable data deluge, fueling
. One way to cope with such a data deluge is to develop low-dimensional data models. Manifold models points and using multiple modalities. This can lead to a veritable data deluge, fueling the need
in detailed gas-phase chemical kinetics modeling, · detailed kinetics are essential for accurate modeling;Partial Review of Manifold Methods in Reactive Systems · The ILDM, CSP, and ICE-PIC are approximations
Mean-shift algorithms for manifold denoising, matrix completion and clustering
Wang, Weiran
2013-01-01T23:59:59.000Z
and the centroids found by K-means, K-modes, and mean-Rosasco. Learning manifolds with k- means and k-flats. In P.Huang. Extensions to the k-means algorithm for clustering
Manifold and method of batch measurement of Hg-196 concentration using a mass spectrometer
Grossman, M.W.; Evans, R.
1991-11-26T23:59:59.000Z
A sample manifold and method of its use has been developed so that milligram quantities of mercury can be analyzed mass spectroscopically to determine the [sup 196]Hg concentration to less than 0.02 atomic percent. Using natural mercury as a standard, accuracy of [+-]0.002 atomic percent can be obtained. The mass spectrometer preferably used is a commercially available GC/MS manufactured by Hewlett Packard. A novel sample manifold is contained within an oven allowing flow rate control of Hg into the MS. Another part of the manifold connects to an auxiliary pumping system which facilitates rapid clean up of residual Hg in the manifold. Sample cycle time is about 1 hour. 8 figures.
Manifold and method of batch measurement of Hg-196 concentration using a mass spectrometer
Grossman, Mark W. (Belmont, MA); Evans, Roger (N. Hampton, NH)
1991-01-01T23:59:59.000Z
A sample manifold and method of its use has been developed so that milligram quantities of mercury can be analyzed mass spectroscopically to determine the .sup.196 Hg concentration to less than 0.02 atomic percent. Using natural mercury as a standard, accuracy of .+-.0.002 atomic percent can be obtained. The mass spectrometer preferably used is a commercially available GC/MS manufactured by Hewlett Packard. A novel sample manifold is contained within an oven allowing flow rate control of Hg into the MS. Another part of the manifold connects to an auxiliary pumping system which facilitates rapid clean up of residual Hg in the manifold. Sample cycle time is about 1 hour.
Characterization and parameterization of the singular manifold of a simple 6-6 Stewart platform
T. Charters; P. Freitas
2008-11-07T23:59:59.000Z
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
2009-05-24T23:59:59.000Z
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.
Stretch fast dynamo mechanism via conformal mapping in Riemannian manifolds
Garcia de Andrade, L. C. [Departamento de Fisica Teorica, Instituto de Fisica, UERJ Rua Sao Fco. Xavier 524, Rio de Janeiro, RJ Maracana, CEP:20550-003 (Brazil)
2007-10-15T23:59:59.000Z
Two new analytical solutions of the self-induction equation in Riemannian manifolds are presented. The first represents a twisted magnetic flux tube or flux rope in plasma astrophysics, where the rotation of the flow implies that the poloidal field is amplified from toroidal field, in the spirit of dynamo theory. The value of the amplification depends on the Frenet torsion of the magnetic axis of the tube. Actually this result illustrates the Zeldovich stretch, twist, and fold method to generate dynamos from straight and untwisted ropes. Based on the fact that this problem was previously handled, using a Riemannian geometry of twisted magnetic flux ropes [Phys Plasmas 13, 022309 (2006)], investigation of a second dynamo solution, conformally related to the Arnold kinematic fast dynamo, is obtained. In this solution, it is shown that the conformal effect on the fast dynamo metric enhances the Zeldovich stretch, and therefore a new dynamo solution is obtained. When a conformal mapping is performed in an Arnold fast dynamo line element, a uniform stretch is obtained in the original line element.
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
IS-321-312-001 TEP-to-HTEP manifold interface sheet
Willms, R Scott [Los Alamos National Laboratory; Carlson, Bryan J [Los Alamos National Laboratory; Coons, James E [Los Alamos National Laboratory; Kubic, William L [Los Alamos National Laboratory
2008-01-01T23:59:59.000Z
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.
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
2014-05-15T23:59:59.000Z
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.
Zuo-Bing Wu
2008-03-17T23:59:59.000Z
In this paper, a method to construct topological template in terms of symbolic dynamics for the diamagnetic Kepler problem is proposed. To confirm the topological template, rotation numbers of invariant manifolds around unstable periodic orbits in a phase space are taken as an object of comparison. The rotation numbers are determined from the definition and connected with symbolic sequences encoding the periodic orbits in a reduced Poincar\\'e section. Only symbolic codes with inverse ordering in the forward mapping can contribute to the rotation of invariant manifolds around the periodic orbits. By using symbolic ordering, the reduced Poincar\\'e section is constricted along stable manifolds and a topological template, which preserves the ordering of forward sequences and can be used to extract the rotation numbers, is established. The rotation numbers computed from the topological template are the same as those computed from their original definition.
On rank 2 vector bundles on Fano manifolds Roberto Mu~noz, Gianluca Occhetta, and Luis E. Sola Conde
Occhetta, Gianluca
On rank 2 vector bundles on Fano manifolds Roberto Mu~noz, Gianluca Occhetta, and Luis E. SolÂ´a~NOZ, GIANLUCA OCCHETTA, AND LUIS E. SOLÂ´A CONDE setting of rank two vector bundles on Fano manifolds of Picard
GAMMA-CONVERGENCE AND THE EMERGENCE OF VORTICES FOR GINZBURG-LANDAU ON THIN SHELLS AND MANIFOLDS
Sternberg, Peter
-Landau energy in the presence of an applied magnetic field when the superconducting sample occupies a thin neighborhood of a bounded, closed manifold in R3 . We establish -convergence to a reduced Ginzburg-Landau model critical points when the manifold M is a simply connected surface of revolution and the applied field
Topology of Homology Manifolds J. Bryant1, S. Ferry1, W. Mio1, and S. Weinberger1; 2
Mio, Washington
Topology of Homology Manifolds J. Bryant1, S. Ferry1, W. Mio1, and S. Weinberger1; 2 Florida State and Bryant-Lacher 7 , when the dimension of the singular set of the homology manifold is in the stable range
Utah, University of
of the population. We evaluate the proposed method on the OASIS and ADNI brain databases of head MR images in twoManifold modeling for brain population analysis Samuel Gerber *, Tolga Tasdizen, P. Thomas Fletcher Brain MRI Manifold learning Computer aided clinical diagnosis a b s t r a c t This paper describes
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)
2010-12-21T23:59:59.000Z
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.
An experimental investigation of sand transport in inclined eccentric annuli
McClellan, John Christopher
1991-01-01T23:59:59.000Z
of Ihoyo and Tomren mentioned above. Also noted was the effect of a cuttings bed sliding, in inclinations up to the 60-degree range, after circulation was stopped. Other researchers have also noted this effect and the incipient dangers to drilling... suspension, heterogeneous suspension, saltation, clusters, dunes, continuous moving beds, and stationary beds. Similar to the author's research, they used sand particles continuously circulated at a set concentration. In their conclusions they state: 1...
COMPRESSIVE VIDEO CLASSIFICATION IN A LOW-DIMENSIONAL MANIFOLD WITH LEARNED DISTANCE METRIC
Tsakalides, Panagiotis
COMPRESSIVE VIDEO CLASSIFICATION IN A LOW-DIMENSIONAL MANIFOLD WITH LEARNED DISTANCE METRIC George Tzagkarakis1 , Grigorios Tsagkatakis2 , Jean-Luc Starck1 and Panagiotis Tsakalides2 1 Commissariat `a l'Â´Energie of video classification based on a set of com- pressed features, without the need of accessing the original
Manifold-based starting point generation and its application to distillation
Neumaier, Arnold
Manifold-based starting point generation and its application to distillation Ali Baharev*, Ferenc-states in homogeneous azeotropic distillation . . . . . . . . . . 11 5.2 Multiple steady-states in ideal two-product distillation . . . . . . . . . . . . . . 11 6 Conclusion 13 A Ordering sparse matrices 14 A.1 Ordering to block
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)
2011-01-11T23:59:59.000Z
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.
DEHN SURGERIES ON 2-BRIDGE LINKS WHICH YIELD REDUCIBLE 3-MANIFOLDS
Hachimori, Masahiro
) 1 = -w + u + 1 and 2 = -w + u - 1. (b) 1 = -w + u and 2 = -w + u. (2) w = 1, u = -2 and 1 = -1 and 2 -2 is a reducible 3-manifold if and only if it is one of the followings or its mirror image. (1) (a
ANALYTIC EQUIVALENCE OF NORMAL CROSSING FUNCTIONS ON A REAL ANALYTIC MANIFOLD
Paris-Sud XI, Université de
ANALYTIC EQUIVALENCE OF NORMAL CROSSING FUNCTIONS ON A REAL ANALYTIC MANIFOLD Goulwen Fichou crossing singularities after a modification. We focus on the analytic equivalence of such functions with only normal crossing singularities. We prove that for such functions C right equivalence implies
Water Pentamer: Characterization of the Torsional-Puckering Manifold by Terahertz VRT Spectroscopy
Cohen, Ronald C.
Water Pentamer: Characterization of the Torsional-Puckering Manifold by Terahertz VRT Spectroscopy Heather A. Harker, Mark R. Viant, Frank N. Keutsch,Â§ Ernest A. Michael,| Ryan P. McLaughlin, and Richard J observation of this perturbation in the perdeuterated water pentamer, as well as the first observation
Learning Manifolds with K-Means and K-Flats Guille D. Canas ,
Poggio, Tomaso
Learning Manifolds with K-Means and K-Flats Guille D. Canas , Tomaso Poggio , Lorenzo A. Rosasco samples. In particular, we consider piecewise constant and piecewise linear estima- tors induced by k-means and k-flats, and analyze their performance. We extend previous results for k-means in two separate
markets. Index Terms-- Electricity spot price, locational marginal price, electricity forward curveIEEE TRANSACTIONS ON POWER SYSTEMS, CHEN, DENG AND HUO. 1 Electricity Price Curve Modeling and prediction of electricity price curves by applying the manifold learning methodology. Cluster analysis based
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
Natural Conjugate Gradient on Complex Flag Manifolds for Complex Independent Subspace
Plumbley, Mark
conjugate gradient method yields better convergence compared to the natural gradient geodesic search method is the natural gradient geodesic search method (NGS), and the other is the natural conjugate gradient method (NCG the natural gradient or the Newton's method on complex manifolds, however, the behavior of the conjugate
Convergence and Rate of Convergence of A Manifold-Based Dimension Reduction Algorithm
Huo, Xiaoming
of a particular manifold- based learning algorithm: LTSA [12]. The main technical tool is the perturbation analysis on the linear invariant subspace that corresponds to the solution of LTSA. We derive the upper bound for errors under the worst case for LTSA; it naturally leads to a convergence result. We
Type Master Thesis Title TV based image processing for manifold-valued data
Grohs, Philipp
Type Master Thesis Title TV based image processing for manifold-valued data Advisor PROF. PHILIPP of a numerical array of real values (as e.g. in grey-value images) but rather of arrays (matrices) whose elements images, covariance matrices arising in radar observatory data, etc... The challenge is to extend
Paris-Sud XI, Université de
Reduction, Centre Manifold, Robust Analysis, Uncertainty Propagation, Polynomial chaos, Non-intrusive to compute the deterministic components called stochastic modes in an intrusive and a non intrusive manner while random components are concentrated in the polynomial basis used. Non intrusive procedures
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
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
university-logo Two papers which changed my life: Milnor's seminal work on flat manifolds
Goldman, William
university-logo Two papers which changed my life: Milnor's seminal work on flat manifolds Two Banff International Research Station February 24, 2011 #12;university-logo Two papers which changed my of Euclidean 3-space by free groups of affine transformations. #12;university-logo Two papers which changed my
Victor Kalvin
2010-07-25T23:59:59.000Z
In this paper we continue our study of the Laplacian on manifolds with axial analytic asymptotically cylindrical ends initiated in~arXiv:1003.2538. By using the complex scaling method and the Phragm\\'{e}n-Lindel\\"{o}f principle we prove exponential decay of the eigenfunctions corresponding to the non-threshold eigenvalues of the Laplacian on functions. In the case of a manifold with (non-compact) boundary it is either the Dirichlet Laplacian or the Neumann Laplacian. We show that the rate of exponential decay of an eigenfunction is prescribed by the distance from the corresponding eigenvalue to the next threshold. Under our assumptions on the behaviour of the metric at infinity accumulation of isolated and embedded eigenvalues occur. The results on decay of eigenfunctions combined with the compactness argument due to Perry imply that the eigenvalues can accumulate only at thresholds and only from below. The eigenvalues are of finite multiplicity.
Bose-Einstein Condensation on a Manifold with Nonnegative Ricci Curvature
Levent Akant; Emine Ertugrul; Ferzan Tapramaz; O. Teoman Turgut
2014-03-28T23:59:59.000Z
The Bose-Einstein condensation for an ideal Bose gas and for a dilute weakly interacting Bose gas in a manifold with nonnegative Ricci curvature is investigated using the heat kernel and eigenvalue estimates of the Laplace operator. The main focus is on the nonrelativistic gas. However, special relativistic ideal gas is also discussed. The thermodynamic limit of the heat kernel and eigenvalue estimates is taken and the results are used to derive bounds for the depletion coefficient. In the case of a weakly interacting gas Bogoliubov approximation is employed. The ground state is analyzed using heat kernel methods and finite size effects on the ground state energy are proposed. The justification of the c-number substitution on a manifold is given.
Extension of distributions, scalings and renormalization of QFT on Riemannian manifolds
Nguyen Viet Dang
2014-11-13T23:59:59.000Z
Let $M$ be a smooth manifold and $X\\subset M$ a closed subset of $M$. In this paper, we introduce a natural condition of \\emph{moderate growth} along $X$ for a distribution $t$ in $\\mathcal{D}^\\prime(M\\setminus X)$ and prove that this condition is equivalent to the existence of an extension of $t$ in $\\mathcal{D}^\\prime(M)$ generalizing some previous results of Meyer and Brunetti--Fredenhagen. When $X$ is a closed submanifold of $M$, we show that the concept of distributions with moderate growth coincides with weakly homogeneous distributions of Meyer. Then we renormalize products of distributions with functions tempered along $X$ and finally, using the whole analytical machinery developed, we give an existence proof of perturbative quantum field theories on Riemannian manifolds.
The Construction of Spinor Fields on Manifolds with Smooth Degenerate Metrics
J Schray; T Dray; C A Manogue; R W Tucker; C Wang
1996-05-17T23:59:59.000Z
We examine some of the subtleties inherent in formulating a theory of spinors on a manifold with a smooth degenerate metric. We concentrate on the case where the metric is singular on a hypersurface that partitions the manifold into Lorentzian and Euclidean domains. We introduce the notion of a complex spinor fibration to make precise the meaning of continuity of a spinor field and give an expression for the components of a local spinor connection that is valid in the absence of a frame of local orthonormal vectors. These considerations enable one to construct a Dirac equation for the discussion of the behavior of spinors in the vicinity of the metric degeneracy. We conclude that the theory contains more freedom than the spacetime Dirac theory and we discuss some of the implications of this for the continuity of conserved currents.
Infrared divergence of a scalar quantum field model on a pseudo Riemannian manifold
C. Gérard; F. Hiroshima; A. Panati; A. Suzuki
2011-03-18T23:59:59.000Z
A scalar quantum field model defined on a pseudo Riemann manifold is considered. The model is unitarily transformed the one with a variable mass. By means of a Feynman-Kac-type formula, it is shown that when the variable mass is short range, the Hamiltonian has no ground state. Moreover the infrared divergence of the expectation values of the number of bosons in the ground state is discussed.
Energy identity of approximate biharmonic maps to Riemannian manifolds and its application
Wang, Changyou
2011-01-01T23:59:59.000Z
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.
Perforation patterned electrical interconnects
Frey, Jonathan
2014-01-28T23:59:59.000Z
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.
Kelley; Dana A. (New Milford, CT), Farooque; Mohammad (Danbury, CT), Davis; Keith (Southbury, CT)
2007-10-02T23:59:59.000Z
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.
Eigenvalues of Killing Tensors and Separable Webs on Riemannian and Pseudo-Riemannian Manifolds
Claudia Chanu; Giovanni Rastelli
2007-02-12T23:59:59.000Z
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.
Mariz, T.; Menezes, R.; Nascimento, J.R.S.; Ribeiro, R.F. [Departamento de Fisica, Universidade Federal da Paraiba, 58051-970 Joao Pessoa, Paraiba (Brazil); Wotzasek, C. [Instituto de Fisica, Universidade Federal do Rio de Janeiro, 21945 Rio de Janeiro (Brazil)
2004-10-15T23:59:59.000Z
We study issues of duality and dual equivalence in noncommutative manifolds. In particular, the question of dual equivalence for the actions of the noncommutative extensions of the self-dual model in 3D space-time and the Maxwell-Chern-Simons model is investigated. We show that former model is not dual equivalent to the noncommutative extension of the Maxwell-Chern-Simons model, as widely believed, but a deformed version of it that is disclosed here. Our results are not restricted to any finite order in the Seiberg-Witten expansion involving the noncommutative parameter {theta}.
Falicoff, Waqidi; Chaves, Julio C.; Minano, Juan Carlos; Benitez, Pablo; Dross, Oliver; Parkyn, Jr., William A.
2010-02-23T23:59:59.000Z
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.
Pauwels, M.A.; Wright, D.O.
1986-07-15T23:59:59.000Z
A microprocessor based electronic engine control system is described for an internal combustion engine, a method for updating the stored ambient pressure signal by measuring the ambient barometric pressure during engine operation using a manifold pressure sensor. The method consists of: generating timing signals indicating the rotational position of an engine member and including a signal indicating a predetermined rotational position in the rotation of the engine member; generating a pressure signal from the manifold pressure sensor representing the pressure surrounding the sensor in response to the predetermined rotational position; reading the value of ambient barometric pressure stored in the memory of the microprocessor; comparing the value of the barometric pressure stored in the memory of the microprocessor and the value of the pressure signal; increasing the value of the barometric pressure by one unit to generate a new barometric pressure value when the value of the pressure signal is greater than the value of the barometric pressure; comparing the new barometric pressure value with a predetermined fixed constant representing the maximum barometric pressure; and storing in the memory of the microprocessor either the new barometric pressure value if equal to or less than the fixed constant or the value of the maximum barometric pressure if the new barometric pressure value is greater than the fixed constant.
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
Manifold, bus support and coupling arrangement for solid oxide fuel cells
Parry, G.W.
1988-04-21T23:59:59.000Z
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.
Solid oxide fuel cell having monolithic cross flow core and manifolding
Poeppel, R.B.; Dusek, J.T.
1983-10-12T23:59:59.000Z
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.
The quintic nonlinear Schr\\"odinger equation on three-dimensional Zoll manifolds
Herr, Sebastian
2011-01-01T23:59:59.000Z
Let (M,g) be a three-dimensional smooth compact Riemannian manifold such that all geodesics are simple and closed with a common minimal period, such as the 3-sphere S^3 with canonical metric. In this work the global well-posedness problem for the quintic nonlinear Schr\\"odinger equation i\\partial_t u+\\Delta u=\\pm|u|^4u, u|_{t=0}=u_0 is solved for small initial data u_0 in the energy space H^1(M), which is the scaling-critical space. Moreover, local well-posedness is shown for large data, as well as persistence of higher initial Sobolev regularity. This extends previous results of Burq-G\\'erard-Tzvetkov to the endpoint case.
P. M. Sutter; Tsunefumi Tanaka
2006-10-11T23:59:59.000Z
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.
Solid oxide fuel cell having monolithic cross flow core and manifolding
Poeppel, Roger B. (Glen Ellyn, IL); Dusek, Joseph T. (Downers Grove, IL)
1984-01-01T23:59:59.000Z
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.
Leonid Lantsman
2010-08-17T23:59:59.000Z
We intend to show that the vacuum manifold inherent in the Minkowskian non-Abelian model involving Higgs and Yang-Mills BPS vacuum modes and herewith quantized by Dirac can be described with the help of the superselection rules if and only if the "discrete" geometry for this vacuum manifold is assumed (it is just a necessary thing in order justify the Dirac fundamental quantization scheme applied to the mentioned model) and only in the infinitely narrow spatial region of the cylindrical shape where topologically nontrivial vortices are located inside this discrete vacuum manifold.
Gary D. Bourn; Ford A. Phillips; Ralph E. Harris
2005-12-01T23:59:59.000Z
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.
Fang, Bess [Department of Physics, Block S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543 (Singapore); Vignolo, Patrizia; Gattobigio, Mario [Universite de Nice-Sophia Antipolis, Institut Non Lineaire de Nice, CNRS, 1361 route des Lucioles, F-06560 Valbonne (France); Miniatura, Christian [Department of Physics, Block S12, Faculty of Science, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Centre for Quantum Technologies, National University of Singapore, 3 Science Drive 2, Singapore 117543 (Singapore); Universite de Nice-Sophia Antipolis, Institut Non Lineaire de Nice, CNRS, 1361 route des Lucioles, F-06560 Valbonne (France); Minguzzi, Anna [Universite Grenoble 1, CNRS, LPMMC, UMR5493, Maison des Magisteres, F-38042 Grenoble (France)
2011-08-15T23:59:59.000Z
We present the exact solution for the many-body wavefunction of a one-dimensional mixture of bosons and spin-polarized fermions with equal masses and infinitely strong repulsive interactions under external confinement. Such a model displays a large degeneracy of the ground state. Using a generalized Bose-Fermi mapping, we find the solution for the whole set of ground-state wave functions of the degenerate manifold and we characterize them according to group-symmetry considerations. We find that the density profile and the momentum distribution depends on the symmetry of the solution. By combining the wave functions of the degenerate manifold with suitable symmetry and guided by the strong-coupling form of the Bethe-Ansatz solution for the homogeneous system, we propose an analytic expression for the many-body wave function of the inhomogeneous system which well describes the ground state at finite, large, and equal interaction strengths, as validated by numerical simulations.
Christopher J. Fama; Susan M. Scott
1994-06-21T23:59:59.000Z
The {\\em abstract boundary\\/} (or {\\em {\\em a\\/}-boundary\\/}) of Scott and Szekeres \\cite{Scott94} constitutes a ``boundary'' to any $n$-dimensional, paracompact, connected, Hausdorff, $C^\\infty$-manifold (without a boundary in the usual sense). In general relativity one deals with a {\\em space-% time\\/} $(\\cM,g)$ (a 4-dimensional manifold $\\cM$ with a Lorentzian metric $g$), together with a chosen preferred class of curves in $\\cM$. In this case the {\\em a\\/}-boundary points may represent ``singularities'' or ``points at infinity''. Since the {\\em a\\/}-boundary itself, however, does not depend on the existence of further structure on the manifold such as a Lorentzian metric or connection, it is possible for it to be used in many contexts. In this paper we develop some purely topological properties of abstract boundary sets and abstract boundary points ({\\em a\\/}-boundary points). We prove, amongst other things, that compactness is invariant under boundary set equivalence, and introduce another invariant concept ({\\em isolation\\/}), which encapsulates the notion that a boundary set is ``separated'' from other boundary points of the same embedding. ....... [The abstract continues in paper proper - truncated to fit here.
The landscape of G-structures in eight-manifold compactifications of M-theory
Babalic, Elena Mirela
2015-01-01T23:59:59.000Z
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
2015-05-09T23:59:59.000Z
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
1999-02-11T23:59:59.000Z
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!
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)
2008-02-15T23:59:59.000Z
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.
Manifold, bus support and coupling arrangement for solid oxide fuel cells
Parry, Gareth W. (East Windsor, CT)
1989-01-01T23:59:59.000Z
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
2011-11-01T23:59:59.000Z
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
2013-05-17T23:59:59.000Z
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\
Heat transfer to a fluid flowing in annuli of various cross-sectional geometries
Goldstone, Thomas Walter
1962-01-01T23:59:59.000Z
. 2 149. 5 122. 9 148 1 95. 6 122 ~ 5 148. 5 3. 48 3. 48 3. 64 4. 25 4. 31 4. 40 4. 72 4. 88 4. 86 5. 17 5. 27 5. 04 1610 1600 1610 2140 2160 2170 2670 2670 2650 3 080 3090 3090 2510 2500 2490 3350 3360 3380 4180... Case (Round Tube) . 14 Results Obtained with the Square Tube Having a Concentric Inher Cylinder 15 Comparison of the Results of Eccentric Positions of the Inner Cylinder with the Concentric Case (Square Tube). 17 SYMBOLS, DIMENSIONS, AND TYPICAL...
Benchmark Evaluation of Uranium Metal Annuli and Cylinders with Beryllium Reflectors
John D. Bess
2010-06-01T23:59:59.000Z
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.
Colbert, John Wesley
1993-01-01T23:59:59.000Z
' are critical not just because the beds slide downward against flow, but also because upon circulation disruption the beds avalanche to the bottom. In 1991, Becker, Qkrajni, and Azar, published results of their experimental studies of the effect of mud... in suspension in the circulating fluid. In addition, they described seven different slurry flow patterns; homogeneous suspension, heterogeneous suspension, saltation, clusters, dunes, continuous moving beds and stationary beds. They concluded: 1...
Not Available
1991-09-01T23:59:59.000Z
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.
2014-08-31T23:59:59.000Z
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.
Alternating projections on manifolds
2006-07-27T23:59:59.000Z
Jul 27, 2006 ... The survey ar- ticle [BB96] covers ... ?School of Operations Research and Industrial Engineering, Cornell University, Ithaca,. NY 14853, U.S.A. ...
Raffray, A. René
2014-01-01T23:59:59.000Z
, assembly and maintenance, Fusion Eng. Des. (2014), http://dx.doi.org/10.1016/j.fusengdes.2014.elsevier.com/locate/fusengdes ITER blanket manifold system: Integration, assembly and maintenance Alex Martina, , George Dellopoulosb failure would prevent ITER operation a maintenance strategy has been planned. © 2014 Elsevier B.V. All
Ungulate Carcasses Perforate Ecological Filters and Create
and others 2005; Gilliam 2007; Dearden and War- dle 2008). Under some conditions, persistent dominant
Not Available
1991-09-01T23:59:59.000Z
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.
TOPIC I: MANIFOLDS AND MORSE THEORY Manifolds and Riemannian Geometry
Sum: Poincare-Hopf Theorem, Gauss Mapping Framed Cobordisms The Pontryagin Construction Product, Canonical, Normal, and Conormal Sheaves 4. Geometric Genus H. Cohomology of Sheaves and of a Noetherian Affine Scheme I. Cech Cohomology K. Riemann-Roch Theorem for Curves and Surfaces 1. Canonical Divisor
EQUALITY CONSTRAINTS, RIEMANNIAN MANIFOLDS AND ...
2007-07-27T23:59:59.000Z
Jul 27, 2007 ... (Rice University) for his very ... Fellowship program for providing prior research funding, out of which ... North Carolina State University, 2004.
Controlling manifold covers of orbifolds
McReynolds, D B
2009-01-01T23:59:59.000Z
In this article we prove a generalization of Selberg's lemma on the existence of torsion free, finite index subgroups of arithmetic groups. Some of the geometric applications are the resolution a conjecture of Nimershiem and answers to questions of Long-Reid and the author.
armoured vehicles perforated: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
and efficiency can be observed depending on the size of compressors. Typically, a larger compressor results in higher fuel cell power density at the cost of fuel cell efficiency...
acquired perforating dermatosis: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
that users face in more detail. Some KA approaches use expectations of the entered knowledge to aid usersIntegrating Expectations from Different Sources to Help End Users...
The effect of perforation patterns upon well productivity
Neale, John William
1955-01-01T23:59:59.000Z
)ority of reservoirs it has been observed that the oil exists originally at or near its bubble point? llhen che pressure is reduoed at the well bore, oonsiderable quantities of gas are evolved The oreation of a free gas phase in the interstioes of the porous medium... the flow of oil into the well borea The use of a direot eleotrioal analogy beoomes someuhat more diffioult when dealing with sn oil not highly undersaturated, The oreation of a free gas phase oauses severe ohanges in the resistanoe to the flow of oil...
Homogenization in Perforated Domains. G.A.Chechkin
Braides, Andrea
applications are space antennas, solar panels, civil engi- neering technologies, permeability of membranes much attention of mathematicians in connection with applications. The studying of behavior
artery perforator sparing: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Texas A&M University - TxSpace Summary: position by locking the window to the carotid pulse and the ECG complex. The windows segmented the heart cycles into diastolic and...
Semivectorial Bilevel Optimization on Riemannian Manifolds
2014-11-22T23:59:59.000Z
Nov 22, 2014 ... ... Sciences, Dept. of Mathematics-Informatics, Splaiul Inde- pendentei 313, Bucharest 060042, Romania, e-mail : . 1 ...
Manifold free multiple sheet superplastic forming
Elmer, John W.; Bridges, Robert L.
2004-01-13T23:59:59.000Z
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. (Danville, CA); Bridges, Robert L. (Knoxville, TN)
2001-01-01T23:59:59.000Z
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.
Spin(7) holonomy manifold and Superconnection
Yasui, Y; Yasui, Yukinori; Ootsuka, Takayoshi
2001-01-01T23:59:59.000Z
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
2000-10-09T23:59:59.000Z
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.
DIRECT SEARCH ALGORITHMS OVER RIEMANNIAN MANIFOLDS ...
2007-01-08T23:59:59.000Z
we will deal with in this paper, examining the standard LTMADS in section 6. ..... we will need to scale the ?, ? and ? parameters during the current iteration.
Dark energy and 3-manifold topology
Torsten Asselmeyer-Maluga; Helge Rose
2007-11-21T23:59:59.000Z
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.
Modular manifold for integrated fluidics and electronics
Adkins, Douglas Ray (Albuquerque, NM)
2010-03-30T23:59:59.000Z
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.
Nonzero degree maps between three dimensional manifolds
Liu, Yi
2012-01-01T23:59:59.000Z
201. [DSW11] Pierre Derbez, Hongbin Sun, and Shicheng Wang,no. 4, 733–742. [SWW10] Hongbin Sun, Shicheng Wang, and1, 131–155. [SWWZ12] Hongbin Sun, Shicheng Wang, Jianchun
INVERSE PROBLEMS FOR EINSTEIN MANIFOLDS 1. Introduction ...
2008-01-17T23:59:59.000Z
either the scattering operator at energy n, or the Dirichlet-to-Neumann map for the conformal .... boundary can have low regularity even though g has constant Ricci curvature. We mean that the .... one-parameter family of metrics hi(ti) on ? Ż
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRoseConcernsCompany Oil and GasOff thedriving dataHighlights/0 en
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOfRoseConcernsCompany Oil and GasOff thedriving dataHighlights/0 en
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with formSoutheastern IL ElecStrategic CapitalEnergyStrutturaSubeiSubocean
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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit with formSoutheastern IL ElecStrategic CapitalEnergyStrutturaSubeiSuboceanSubsea
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 ...
Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers
Abdulsattar, Suhaeb S
2014-05-03T23:59:59.000Z
and becomes an important cause of head loss through the sump strainer, affecting the Emergency Core Cooling System (ECCS) performance. This study was dedicated to measure the pressure drop across randomly accumulated debris bed on the sump strainer along...
Using Code Perforation to Improve Performance, Reduce Energy Consumption, and Respond to Failures
Agarwal, Anant
2009-09-03T23:59:59.000Z
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 ...
Special Perforated Steel Plate Shear Walls with Reduced Beam Section Anchor Beams. II: Analysis and
Bruneau, Michel
; Seismic design. Introduction Steel plate shear walls are a single or multistory lateral force resisting system consisting of thin, unstiffened, infill plates con- nected to their boundary frames. Upon lateral loading, buckling occurs in the infill plates, precipitating the development of a ten- sion field action
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
MA455 Manifolds Programme, Aims, Objectives, all rolled into one
Mond, David
famous theorems: Brouwer's fixed-point theorem (that every continuous map Bn Bn has a fixed-point, where, it would make a good preparation. I stongly recommend chapters 1 through 5 as bed-time reading during
MA455 Manifolds Programme, Aims, Objectives, all rolled into one
Mond, David
famous theorems: Brouwer's fixedpoint theorem (that every continuous map B n # B n has a fixed, it would make a good preparation. I stongly recommend chapters 1 through 5 as bedtime reading during
Online Manifold Regularization: A New Learning Setting and Empirical Study
Zhu, Xiaojin "Jerry"
Consider a mobile robot continuously learning to recognize interesting objects (x) with limited feedback) i = t 4. Store xt, let t = t + 1 SPARSE APPROXIMATIONS The algorithm is impractical Space O(T): stores all previous examples Time O(T2 ): each new example compared to all previous ones In reality
Geometrical classification of Killing tensors on bidimensional flat manifolds
C. Chanu; L. Degiovanni; R. G. McLenaghan
2006-08-31T23:59:59.000Z
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.
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
Counter-rotating Kerr manifolds separated by a fluid shell
J. P. Krisch; E. N. Glass
2009-08-13T23:59:59.000Z
We describe a spheroidal fluid shell between two Kerr vacuum regions which have opposite rotation parameters. The shell has a stiff equation of state and a heat flow vector related to the rotational Killing current. The shell description is useful in exploring the significance of counter-rotation in Kerr metric matches.
Three-dimensional routed manifolds with externally inserted cables
Breinlinger, Keith J. (Keith Joseph), 1974-
2003-01-01T23:59:59.000Z
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 ...
Skew-product decompositions of Brownian motions on manifolds: A ...
2002-07-25T23:59:59.000Z
(1) If (M,g) is an euclidean sphere, i.e. the sectional curvature K is constant and non- ..... 27,. 139–142. [6] A.R. Galmarino, Representation of an isotropic diffusion as a ... [19] H.S. Ruse, A.G. Walker, T.J. Willlmore, Harmonic Spaces, Edizioni ...
Manifolds and Transformation Groups WS 05 --Technische Universitat Darmstadt
Sanderson, Yasmine
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42 III.2. The exterior product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 III.3. Orientations on vector space . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 IV.3. The exterior differential
Invariant manifolds for a singular ordinary differential equation Stefano Bianchini
Spinolo, Laura Valentina
, Scuola Normale Superiore, Pisa, Italy and Institute of Mathemathics, University of Zurich, Switzerland
$K$-theory on arbitrary manifolds and topological insulators
Koushik Ray; Siddhartha Sen
2014-12-23T23:59:59.000Z
We discuss means to study topological properties of wavefunctions in a time reversal invariant crystalline system through $K$-groups. The well-known methods for calculating $K$-groups of $G$-bundles over spheres are extended using earlier results in order to deal with wavefunctions defined over toroidal Brillouin zones, following a method due to Nash. The recently discovered topological insulator is considered as an illustrative example.
Large-Scale Methods for Nonlinear Manifold Learning
Vladymyrov, Maksym
2014-01-01T23:59:59.000Z
search directions, optimization techniques and N -body methods with specific NLEsearch directions, opti- mization techniques and N -body methods with specific NLE
EIGENVALUES OF AN ALIGNMENT MATRIX IN NONLINEAR MANIFOLD LEARNING
Li, Chi-Kwong
. This forms a theoretical basis for the LTSA (Local Tangent Space Alignment) algorithm of [11] recently for this problem [1, 3, 5, 7, 11]. The alignment matrix was first introduced in the LTSA method [11] in which
THE MANIFOLD STRUCTURE OF G/H PATRICK EBERLEIN
Eberlein, Patrick
)) contains H and hence also P H = G = TeG. It follows that : T(0,0)(P x H) TeG is an isomorphism since dim
Quantized Nambu-Poisson manifolds and n-Lie algebras
DeBellis, Joshua; Saemann, Christian; Szabo, Richard J. [Department of Mathematics, Heriot-Watt University, Colin Maclaurin Building, Riccarton, Edinburgh EH14 4AS (United Kingdom) and Maxwell Institute for Mathematical Sciences, Edinburgh (United Kingdom)
2010-12-15T23:59:59.000Z
We investigate the geometric interpretation of quantized Nambu-Poisson structures in terms of noncommutative geometries. We describe an extension of the usual axioms of quantization in which classical Nambu-Poisson structures are translated to n-Lie algebras at quantum level. We demonstrate that this generalized procedure matches an extension of Berezin-Toeplitz quantization yielding quantized spheres, hyperboloids, and superspheres. The extended Berezin quantization of spheres is closely related to a deformation quantization of n-Lie algebras as well as the approach based on harmonic analysis. We find an interpretation of Nambu-Heisenberg n-Lie algebras in terms of foliations of R{sup n} by fuzzy spheres, fuzzy hyperboloids, and noncommutative hyperplanes. Some applications to the quantum geometry of branes in M-theory are also briefly discussed.
Extention cohomological fields theories and noncommutative Frobenius manifolds
S. M. Natanzon
2005-10-04T23:59:59.000Z
We construct some extension ({\\it Stable Field Theory}) of Cohomological Field Theory. The Stable Field Theory is a system of homomorphisms to some vector spaces generated by spheres and disks with punctures. It is described by a formal tensor series, satisfying to some system of "differential equations". In points of convergence the tensor series generate special noncommutative analogues of Frobenius algebras, describing 'Open-Closed' Topological Field Theories.
Extreme Elevation on a 2-Manifold Pankaj K. Agarwal
Edelsbrunner, Herbert
is clearly important and the interest in protein docking is correspondingly wide-spread. We refer to survey by NSF under grants EIA-99- 72879, EIA-01-31905, CCR-00-86013, CCR-02-04118, DMS-01-07621, and by the U
On the counting of holomorphic discs in toric Fano manifolds
Cheol-Hyun Cho
2014-03-18T23:59:59.000Z
Open Gromov-Witten invariants in general are not well-defined. We discuss in detail the enumerative numbers of the Clifford torus $T^2$ in $\\CP^2$. For cyclic A-infinity algebras, we show that certain generalized way of counting may be defined up to Hochschild or cyclic boundary elements. In particular we obtain a well-defined function on Hochschild or cyclic homology of a cyclic A-infinity algebra, which has invariance property under cyclic A-infinity homomorphism. We discuss an example of Clifford torus $T^2$ and compute the invariant for a specific cyclic cohomology class.
Geometric Integration: Numerical Solution of Differential Equations on Manifolds
Burton, Geoffrey R.
and the solar system. Conserved quantities of a Hamiltonian system, such as energy, linear and angular momentum that they encapsulate. The importance of geometry has been widely acknowledged in both pure and apÂ plied research
Global expenditure on subsea manifolds is estimated to reach...
investment in research and development activities increases and manufacturers vie to win contracts from companies that have strong, established positions in hydrocarbon...
From manifolds to invariants of En?-algebras
Andrade, Ricardo (Ricardo Joel Abrantes Andrade)
2010-01-01T23:59:59.000Z
This thesis is the first step in an investigation of an interesting class of invariants of En-algebras which generalize topological Hochschild homology. The main goal of this thesis is to simply give a definition of those ...
Viability of dynamic cooling control in a data center environment
Boucher, T.; Auslander, D.; Bash, C.; Federspiel, C.; Patel, C.
2006-01-01T23:59:59.000Z
Center: Effect of Perforated Tile Flow Distribution on Rackthe Design of Perforated Tiles in Raised Floor Data CentersDistribution through Perforated Tiles in Raised Floor Data
Appelfeld, David
2013-01-01T23:59:59.000Z
values of the performance indicators, e.g. total solarare the fundamental performance indicators for CFS and all11. Table 2. Energy performance indicators of selected CFS
Paris-Sud XI, Université de
compared collector data with radial spreading data issued from a radial heat transfer model. Although
Salinity driven oceanographic upwelling
Johnson, D.H.
1984-08-30T23:59:59.000Z
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.
Finite Element Analyses of a Cyclically Loaded Linear Viscoelastic Biodegradable Stent
Murphy, Jason Kyle
2014-12-03T23:59:59.000Z
degradation behaviors on the performance of cylindrical annuli that mimic stents under cyclic loadings is examined. Two polymers are considered: poly-L-lactic acid (PLLA) and polyoxymethylene (POM). A numerical algorithm for an isotropic, linear, viscoelastic...
The prediction of low quality boiling voids
Griffith, P.
1963-01-01T23:59:59.000Z
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 ...
The Cremmer-Scherk Mechanism in F-theory Compactifications on K3 Manifolds
Michael R. Douglas; Daniel S. Park; Christian Schnell
2014-03-06T23:59:59.000Z
It is well understood --- through string dualities --- that there are 20 massless vector fields in the spectrum of eight-dimensional F-theory compactifications on smooth elliptically fibered K3 surfaces at a generic point in the K3 moduli space. Such F-theory vacua, which do not have any enhanced gauge symmetries, can be thought of as supersymmetric type IIB compactifications on P1 with 24 (p,q) seven-branes. Naively, one might expect there to be 24 massless vector fields in the eight-dimensional effective theory coming from world-volume gauge fields of the 24 branes. In this paper, we show how the vector field spectrum of the eight-dimensional effective theory can be obtained from the point of view of type IIB supergravity coupled to the world-volume theory of the seven-branes. In particular, we first show that the two-forms of the type IIB theory absorb the seven-brane world-volume gauge fields via the Cremmer-Scherk mechanism. We then proceed to show that the massless vector fields of the eight-dimensional theory come from KK-reducing the SL(2,Z) doublet two-forms of type IIB theory along SL(2,Z) doublet one-forms on the P1. We also discuss the relation between these vector fields and the "eaten" world-volume vector fields of the seven-branes.
, Atmospheric chemistry, Internal combustion engines, Gas phase reactions in energetic solid combustion Kinetics, 2. Combustion of HMX or RDX Product Gases. by Joseph M. Powers Department of Aerospace and Mechanical Engineering University of Notre Dame presented at the 1999 Explosives Research Program Review Los
Three-dimensional numerical manifold method simulations for blocky rock analysis
Shentu, Longfei
2011-01-01T23:59:59.000Z
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. ...
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, ...
Compact Manifolds with Holonomy Spin(7) Christine Taylor, Balliol College, Oxford
Joyce, Dominic
with Holon- omy Spin(7) 8 2.1 Motivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 2
Center Manifold Analysis of a PointVortex Model of Vortex Shedding with Control
Protas, Bartosz
of the point vortex FÂ¨oppl system with linear feedback control. The FÂ¨oppl system was used in an earlier system. Key words: point vortices, flow control, dynamical systems, wake flows PACS: 47.15.Hg, 47.27.Rc, 47.27.Vf 1 Introduction Integration of rigorous methods of Modern Control Theory with Computational
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
Manifold Methods for Energetic Materials Joseph M. Powers and Samuel Paolucci
engines, Â Gas phase reactions in energetic solid combustion. Â· Common detailed kinetic models. T (K) x (cm) 300 3000 solid foam gas 0 10 #12;RDX GAS PHASE COMBUSTION SIMULATION Â· very similar to HMX-Speed Combustion in Gaseous and Condensed-Phase Energetic Materials University of Minnesota 11 November 1999 #12
Recent Progress on a Manifold Damped and Detuned Structure for CLIC
Khan, V F; Grudiev, A; Jones, R M; Wuensch, W; Zennaro, R
2010-01-01T23:59:59.000Z
A damped detuned structure for the main X-band linacs of CLIC is being investigated as an alternative design to the present baseline heavily damped structure. In our earlier designs we studied detuned structures, operating at 11.994 GHz, with a range of dipole bandwidths in order to ensure the structure satisfies beam dynamics and rf breakdown constraints. Here we report on the development of a damped and detuned structure which satisfies both constraints. Preparations for high power testing of the structure are also discussed
Clustering and Dimensionality Reduction on Riemannian Manifolds Alvina Goh Rene Vidal
- tors. When the structure of these features is simple enough, central clustering methods such as K-means. For instance, [15] combines Isomap [17] with EM, and [12, 8] combine LLE [14] with K-means. Unfortunately, all
Tin, Marie-Lyne Appoline
1992-01-01T23:59:59.000Z
rit irlrrl thrff thr ar rrrfq is cegnlnr, i. rf. , d?g 0 7/ 7. fhf n Pj =) has nn Iftnf on fhr cff'r'le, affd there nic h rvot. Inifrle and n ? h r'ovfs out'i de flic unit rlfsl jc ( 1. Ic'? fe I' r. ' f fir nu7fibe'I' fif nrf/I'Ifll'r pl'(7rfncf... v, liole I'a?&il& i& e&lu&&al& n& to ih& stability of i ape& ial subs&& of it?xpo?cl &dg& s. & sile&i t lic 1. '-& d & ~ l "&: i. /& = 1. . . . /l. Ifarl&ab and J&ir& &'I& & x&& &id?l &l&i~ i&sul& to line? i&i&& rval ??i&&el s, -&n?s. Co?- 21...
Genealogy of Nonperturbative Quantum-Invariants of 3-Manifolds: The Surgical Family
Thomas Kerler
1996-03-22T23:59:59.000Z
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.
Mean-shift algorithms for manifold denoising, matrix completion and clustering
Wang, Weiran
2013-01-01T23:59:59.000Z
Dimensionality reduction with Isomap and LTSA after MBMS de-reduction with Isomap and LTSA af- ter MBMS denoising usingreduction with Isomap and LTSA af- ter MBMS denoising using
A Survey of Manifold-Based Learning Xiaoming Huo, Xuelei (Sherry) Ni, and Andrew K. Smith
Huo, Xiaoming
, local tangent space alignment (LTSA), and charting. We describe the insights from these developments, and local tangent space alignment (LTSA). Section 3 stresses an important common point among some recent choose LLE and LTSA as our illustrative examples. Such a common point is likely to be the key to unifying
Analysis of High-Dimensional Signal Data by Manifold Learning and Convolutions
Iske, Armin
techniques are including Isomap and LLE meth- ods [4, 7] Local Tangent Space Alignment (LTSA) [6], Sample
Manifold-Adaptive Dimension Estimation Amir massoud Farahmand amir@cs.ualberta.ca
Szepesvari, Csaba
working in high- dimensional spaces to use resources (time, space, sam- ples) that scale exponentially are images taken of a scene or object, from different angles. Although the images may contain millions
Manifold Assembly for the Convenient Polymerization of Ethylene Oxide and Butadiene
used in the manufacture of synthetic rubber and various plastics. Incorporation of poly is found in the synthesis of styrene-butadiene-styrene rubber.9 Poly(butadiene-b-ethylene oxide) and more
Experimental study of the MHD flow in a prototypic inlet manifold section of the DCLL blanket
Abdou, Mohamed
. The MHD flow patterns and their associated transport properties that result from the interaction between Lithium (DCLL) blanket concept. A series of experiments is carried out in order to understand stacked in the direction the magnetic field lines. For values of the interaction parameter , the flow
Filippone, Maurizio
in a poor Effective Sample Size (ESS) for the length-scale parameters (Murray and Adams, 2010). The metric Table 1. ESS for Gibbs Metropolis-Hastings (Gibbs MH), Gibbs Simplified MMALA (Gibbs S-MMALA), Gibbs RM estimated from pilot runs of Gibbs Wht. We also report the number of calls (in thousands) to the functions
A robust algorithm for template curve estimation based on manifold embedding
Paris-Sud XI, UniversitĂ© de
, Facultad de Ciencias EconĂłmicas, Universidad de Antioquia, MedellĂn, Colombia. c Laboratoire GĂ©nomique et with other methods, with both simulated and real datasets, show that the algorithm works well and outperforms interest for statistical methodologies and algorithms to remove the phase variability and recover a single
An approximation of Wiener measure on manifolds with non- positive sectional curvature
Laetsch, Thomas A.
2012-01-01T23:59:59.000Z
j 2 ) np ??? ] ? n Z j 2 ) npm ] ? ? (1 ? 4?p) ? ? E[(1 + nZ j ] E[(1 + Using the binomial formula, Z j 2 ) npm ] = E[(1 + n npm npm k k=0 npm npm k k=0 npm npm k k=0 npm npm e k
Semi-classical measures on Quantum graphs and the Gau map of the determinant manifold
Recanati, Catherine
believed that QE does not hold in general for a FIXED quantum graph. This is proved for star graphs in [BKW to what people do in several papers like [BG00, BKW04, BW08, Ba12, BB13]. Let
Semi-classical measures on Quantum graphs and the Gau map of the determinant manifold
Boyer, Edmond
believed that QE does not hold in general for a FIXED quantum graph. In [BKW04], it is proved that QE does
Bibliographie [1] R. Abraham, J.E. Marsden, T. Ratiu (1988). Manifolds, Tensors Analysis, and Appli-
1988-01-01T23:59:59.000Z
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.
Bibliographie [1] R. Abraham, J.E. Marsden, T. Ratiu (1988). Manifolds, Tensors Analysis, and Appli
1988-01-01T23:59:59.000Z
Inequalitites. Springer Monographs in Mathematics. Springer, New York. [23] A. Auslender, M. Teboulle, S. BenTiba (1999). A logarithmicquadratic proximal method for variational inequalitites. Computational
Extreme Elevation on a 2-Manifold Pankaj K. Agarwal, Herbert Edelsbrunner, John Harer and Yusu Wang
Agarwal, Pankaj K.
grants EIA-99- 72879, EIA-01-31905, CCR-00-86013, CCR-02-04118, DMS-01-07621, and by the U is clearly important and the interest in protein docking is correspondingly wide-spread. We refer to survey
Riemannian Optimization Method on the Flag Manifold for Independent Subspace Analysis
Plumbley, Mark
of Advanced Industrial Science and Technology (AIST), AIST Central2, 1-1-1, Umezono, Tsukuba, Ibaraki 305 , the components si are generated from statistically independent sources, and A Rn×n is an invertible matrix. Most, and curvature. Therefore, by replacing, for instance, an or- dinary gradient vector of a cost function
Loops in Reeb Graphs of 2-Manifolds Kree Cole-McLaughlin
Pascucci, Valerio
-resolution versions of the Reeb graph have lead to data-base search methods for topologically similar geo- metric and scientific data. Specifically, we study Reeb graphs, which express the connectivity of level sets. These graphs have been used in the past to con- struct data structures and user-interfaces for modeling
Global expenditure on subsea manifolds is estimated to reach USD 3,716.42
AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, search OpenEI Reference LibraryAddInformationEnergyEnergyGWECC Jump
Structure of Three-Manifolds Shing-Tung Yau1,2
;Canonical conformal structure on surfaces Theorem (Poincaré's Uniformization Theorem) Any closed two-dimensional space is conformal to another space with constant Gauss curvature. Spherical Euclidean Hyperbolic #12
Five-dimensional vector-coupled supergravity on a manifold with boundary
McReynolds, Sean
2007-01-01T23:59:59.000Z
We consider the bosonic and fermionic symmetries of five-dimensional Maxwell- and Yang-Mills-Einstein supergravity theories on a spacetime with boundaries (isomorphic to M x S1/Z2). Due to the appearance of the "Chern-Simons" term, the classical action is not generally invariant under gauge and supersymmetries. Once bulk vector fields are allowed to propagate on the boundaries, there is an "inflow" governed by the rank-3 symmetric tensor that defines the five-dimensional theories. We discuss the requirements that invariance of the action imposes on new matter content and boundary conditions.
Five-dimensional vector-coupled supergravity on a manifold with boundary
Sean McReynolds
2007-05-16T23:59:59.000Z
We consider the bosonic and fermionic symmetries of five-dimensional Maxwell- and Yang-Mills-Einstein supergravity theories on a spacetime with boundaries (isomorphic to M x S1/Z2). Due to the appearance of the "Chern-Simons" term, the classical action is not generally invariant under gauge and supersymmetries. Once bulk vector fields are allowed to propagate on the boundaries, there is an "inflow" governed by the rank-3 symmetric tensor that defines the five-dimensional theories. We discuss the requirements that invariance of the action imposes on new matter content and boundary conditions.
A proof of Tsygan's formality conjecture for an arbitrary smooth manifold
Dolgushev, Vasiliy A
2005-01-01T23:59:59.000Z
Proofs of Tsygan's formality conjectures for chains would unlock important algebraic tools which might lead to new generalizations of the Atiyah-Patodi-Singer index theorem and the Riemann-Roch-Hirzebruch theorem. Despite ...
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
Marrucci, Lorenzo
known that the European Union (EU) spends less than two percent of its GDP on research and development, is two-fold. First, Europe invests too little in higher education. Total public and private spending into average spending of less than 10,000 per student in EU25 versus more than 35,000 in the US. Second
J. Phys. Chem. 1981, 85, 3029-3030 3028 intensity, the absorption steps in the ionic manifold will
Torquato, Salvatore
of Vaporlzatlon of a Fluid S. Torqualo Department of Mechanical Engineering, General Motors Institute, Flnt
generate massive amounts of high-dimensional image and video data. One way to cope with this data deluge to a veritable data deluge, fueling the need for efficient algorithms for processing and efficient proto- cols
Three-fold coverings and hyperelliptic manifolds: a three-dimensional version of a result of Accola
630090, Russia and **Universit`a degli Studi di Trieste Dipartimento di Scienze Matematiche 34100 Trieste when the first and the third authors were visiting Trieste in february and may 2000, and it was Marco
Invariant manifolds and the longtime asymptotics of the NavierStokes and vorticity equations on R 2
Gallay, Thierry
2 Thierry Gallay Universitâ??e de ParisÂSud Mathâ??ematiques Bâ??atiment 425 FÂ91405 Orsay France C
Publications of P. E. Jupp [1 ] Jupp, P.E. (1971) Links in manifolds. Topology 10, 219225.
Stone, J. V.
1971-01-01T23:59:59.000Z
1990, (L. Verstraelen and A. West, eds), 163173. World Scientific. [25 ] Jupp, P.E. (1992) Derivative
in the Wild Chinmay Hegde chinmay@rice.edu Aswin C. Sankaranarayanan saswin@rice.edu Richard G. Baraniuk richb employ the KAM framework on a number of real-world image datasets acquired "in the wild" to demonstrate
Beattie, C.I.; Korol, J.R.
1993-08-24T23:59:59.000Z
A method is described for increasing hydrocarbon production from a hydrocarbon reservoir comprising: (a) setting a thermal packer in a casing within a well, said thermal packer being set between a first set of perforations and a second set of perforations which is located closer to the surface of the earth than the first set of perforations, such that said thermal packer hydraulically isolates the first set of perforations from the second set of perforations within the casing; (b) injecting steam into the second set of perforations; (c) discontinuing the injection of steam into the second set of perforations; (d) producing hydrocarbons from the first set of perforations; and (e) venting an area in the well adjacent to the first set of perforations during the time that hydrocarbons are being produced.
GEOSPATIAL TECHNOLOGY The market for geospatial technologies in 2002 was
GEOSPATIAL TECHNOLOGY · The market for geospatial technologies in 2002 was estimated at $5 billion, Annulis,Carr) Building the Geospatial Workforce, Urban and Regional Informational Systems Association Special Education Issue, 2002) · Geospatial products and specialists are expected to play a large role
Developing a tight gas sand advisor for completion and stimulation in tight gas reservoirs worldwide
Bogatchev, Kirill Y.
2009-05-15T23:59:59.000Z
while completing and stimulating TGS reservoirs. The modules include Perforation Selection and Proppant Selection. Based on input well/reservoir parameters these subroutines provide unambiguous recommendations concerning which perforation strategy...
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...
INVITATIONAL WELL-TESTING SYMPOSIUM PROCEEDINGS
Authors, Various
2011-01-01T23:59:59.000Z
set a screen liner and gravel pack the perforated interval.the probable radius of the gravel pack. EQUIVALENT INJECTION
JOURNAL DE PHYSIQUE Colloque C3, Supplbment au n09, Tome 49, septembre 1988
Paris-Sud XI, Université de
the present work examines the perforation of 2024-T351 aluminium alloy plates. Quasi-static tensile, four
Grether, D.
2012-01-01T23:59:59.000Z
Perfor- mance of Focusing Collectors," Solar Energy ResearchCollectors," Proceedings of the 1979 International Congress of the International Solar
Production d'hydrogne au moyen d'un cycle thermo-lectrochimique mettant en oeuvre l'nergie solaire
Paris-Sud XI, Université de
(batterie sodium-soufre, accumulateur zinc- air) le stockage électrique n'est pas encore perfor- mant. Une
Choi, Suhyoung
Euclidean geometry Spherical geometry Manifolds with geometric structures: manifolds need some canonical canonical descriptions.. Manifolds with (real) projective structures Outline Survey: Classical geometries's philosphy) Spherical geometry: Greek astronomy, Gauss, Riemann Hyperbolic geometry: Bolyai, Lobachevsky
Scanlon, Thomas
= {z U | f (z) = 0}. Definition The structure CCM is the multisorted structure having a sort M Questions Basic model theory of CCM Â· CCM eliminates quantifiers. Thomas Scanlon University of California theorem Strongly minimal groups Higher rank groups Questions Basic model theory of CCM Â· CCM eliminates
I. Aharonovich; L. P. Horwitz
2006-03-31T23:59:59.000Z
Gauge fields associated with the manifestly covariant dynamics of particles in (3,1) spacetime are five-dimensional. We provide solutions of the classical 5D gauge field equations in both (4,1) and (3,2) flat spacetime metrics for the simple example of a uniformly moving point source. Green functions for the 5D field equations are obtained, which are consistent with the solutions for uniform motion obtained directly from the field equations with free asymptotic conditions.
aligned phospholipid multi-bilayer: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
learn- ing 1, 3, 13Sparse Manifold Alignment Chang Wang IBM Watson Research Center Yorktown Heights, NY chwang Abstract Previous approaches to manifold alignment are based on...
aligned phospholipid bicelles: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
learn- ing 1, 3, 13Sparse Manifold Alignment Chang Wang IBM Watson Research Center Yorktown Heights, NY chwang Abstract Previous approaches to manifold alignment are based on...
Riemannian holonomy calibrated geometry
Joyce, Dominic
constructed the first com- pact 7-manifolds with holon- omy G2 in 1993-4. This is difficult as such manifolds
10/25 Ben McReynolds (Purdue). Arithmetic Manifolds: An Introduction with Topological Problems. Abstract: I will give an introduction to arithmetic manifolds;
2015-02-11T23:59:59.000Z
Thesis topic: G-Frobenius Manifolds. Advisor: Prof. Ralph M. Kaufmann ... Publication. G-Frobenius manifolds, 39 pages, arXiv:1501.02118, submitted.
Exit time distribution in spherically symmetric two-dimensional domains
Rupprecht, J -F; Grebenkov, D S; Voituriez, R
2014-01-01T23:59:59.000Z
The distribution of exit times is computed for a Brownian particle in spherically symmetric two- dimensional domains (disks, angular sectors, annuli) and in rectangles that contain an exit on their boundary. The governing partial differential equation of Helmholtz type with mixed Dirichlet- Neumann boundary conditions is solved analytically. We propose both an exact solution relying on a matrix inversion, and an approximate explicit solution. The approximate solution is shown to be exact for an exit of vanishing size and to be accurate even for large exits. For angular sectors, we also derive exact explicit formulas for the moments of the exit time. For annuli and rectangles, the approximate expression of the mean exit time is shown to be very accurate even for large exits. The analysis is also extended to biased diffusion. Since the Helmholtz equation with mixed boundary conditions is encountered in microfluidics, heat propagation, quantum billiards, and acoustics, the developed method can find numerous appl...
Conductivity of ionic liquid-derived polymers with internal gold nanoparticle conduits.
Lee, S.; Cummins, M. D.; Willing, G. A.; Firestone, M. A.; Materials Science Division; Univ. of Louisville
2009-01-01T23:59:59.000Z
The transport properties of self-supporting Au nanoparticle-ionic liquid-derived polymer composites were characterized. Topographic AFM images confirm the perforated lamellar composite architecture determined by small-angle X-ray scattering (SAXS) and further show that the in situ synthesized Au nanoparticles are localized within the hydrophilic (water) domains of the structure. At low Au nanoparticle content, the images reveal incomplete packing of spherical particles (i.e., voids) within these columns. The confinement and organization of the Au nanoparticles within the hydrophilic columns give rise to a large manifold of optical resonances in the near-IR region. The bulk composite conductivity, R{sub b}, was determined by ac electrochemical impedance spectroscopy (EIS) for samples prepared with increasing Au{sup 3+} content over a frequency range of 10 Hz to 1 MHz. A 100-fold increase was observed in the bulk conductivity at room temperature for composites prepared with the highest amount of Au{sup 3+} (1.58 {+-} 0.065 {micro}mol) versus the no Au composite, with the former reaching a value of 1.3 x 10{sup -4} S cm{sup -1} at 25 C. The temperature dependence of the conductivity recorded over this range was well-modeled by the Arrhenius equation. EIS studies on samples containing the highest Au nanoparticle content over a broader range of frequencies (2 x 10{sup -2} Hz to 5 x 10{sup 5} Hz) identified a low frequency component ascribed to electronic conduction. Electronic conduction due to aggregated Au nanoparticles was further confirmed by dc conductivity measurements. This work identifies a nanostructured composite that exhibits both ionic transport through the polymeric ionic liquid and electronic conduction from the organized encapsulated columns of Au nanoparticles.
GAFA, Geom. funct. anal. Vol. 8 (1998) 17 58
Piazza, Paolo
1998-01-01T23:59:59.000Z
of the heat kernel on manifolds with conical singularities [C] and Bismut's superconnection heat kernel proof
Scalable microreactors and methods for using same
Lawal, Adeniyi (Livingston, NJ); Qian, Dongying (Millburn, NJ)
2010-03-02T23:59:59.000Z
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
2011-09-02T23:59:59.000Z
Explicit structure constants are calculated for certain Lie algebras of vectorfields on 2-dimensional compact manifolds.
ap composite propellant: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
profiles during polymerization, for the infinite solid cylinder, the infinite hollow cylinder and the star perforated infinite cylinder of polyurethane ammonium...
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...
N N N NATIONAL ATIONAL ATIONAL ATIONAL E E E ENERGY NERGY...
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...
Quality colonoscopy: A matter of time, technique or technology?
Lee, Robert H
2013-01-01T23:59:59.000Z
reserved. FIELD OF VISION Quality colonoscopy: A matter ofrate is a val- id quality measure for colonoscopy: resultspact of videorecording on the quality of colonoscopy perfor-
Al-Majed, Abdulaziz Abdullah
Engineers. Electronic reproduction, distribution, or storage of any part of this paper for commercial, anisotropy ratio, skin, tubing diameter and perforation distribution on the inflow performance
Boyer, Edmond
measurements have been perfor- med on magnetic semiconductors MnxCd xTe mixed c r y s t a l s , i n t h e
animal bioassays published: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
as anvil, wishbone, ring and perforated slab 9 To be published in ACM Transactions on Graphics (SIGGRAPH 2007). Near-optimal Character Animation with Continuous Control...
Innovative outreach increases adoption of sustainable winegrowing practices in Lodi region
Ohmart, Clifford P.
2008-01-01T23:59:59.000Z
wine- growing will need to move past simply tracking practices and include perfor- mance measures, such as the amount of energy
Solar Ventilation Preheating Resources and Technologies | Department...
Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site
Ventilation Preheating Resources and Technologies Solar Ventilation Preheating Resources and Technologies Photo of a dark brown perforated metal wall is pictured on the side of an...
Current use of limited-entry hydraulic fracturing in the Codell/Niobrara Formations -- DJ Basin
Eberhard, M.J.; Schlosser, D.E.
1994-12-31T23:59:59.000Z
In the last several years, limited-entry perforating has been used for hydraulically fracturing the Codell and Niobrara formations in the Denver-Julesburg (DJ) Basin. Limited-entry perforating reduces stimulation costs with no apparent effect on production. Several papers have presented guidelines for designing a limited-entry treatment. A primary concern for treating multiple intervals is to ensure that both zones receive the necessary treatment. Currently, some operators simply ratio the number of perforations in each interval to the volume of treatment required for each interval. To ensure that both zones are being treated, a minimum pressure drop of 700 to 1,000 psi is usually used for limited-entry design. Changes in the perforation discharge coefficient and diameter during the treatment, combined with changes in the net treating pressure, affect the perforation pressure drop calculation. To determine the actual pressure drop across the perforations, designers use a real-time spreadsheet calculation. This paper reviews limited-entry treatments pumped in 34 wells that verify spreadsheet calculations. Changes in the perforation discharge coefficient and diameter will be presented, as well as the effect of proppant concentration and velocity through the perforation. The current spreadsheet calculation used on location to calculate the pressure drop across the perforations is also discussed.
Co-simulation of innovative integrated HVAC systems in buildings
Trcka, Marija
2010-01-01T23:59:59.000Z
Canada: International Building Perfor- mance SimulationExternal coupling between building energy simulation andexternal coupling of building energy and air ow modeling
Power module assemblies with staggered coolant channels
Herron, Nicholas Hayden; Mann, Brooks S; Korich, Mark D
2013-07-16T23:59:59.000Z
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.
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)
2003-04-29T23:59:59.000Z
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.
Alkassim, Ibrahim
2010-01-14T23:59:59.000Z
production of each vertical well vs. Barnett gross thickness (including Forestburg formation) plot. ...........................................44 3.15 EUR in month 480 vs. Barnett gross thickness (including Forestburg formation) plot... .....................................................................................................46 3.18 EUR in month 480 vs. perforation footage plot ..............................................47 3.19 Common Barnett perforated section ...............................................................48 3.20 EUR in month...
Curriculum Vit of SUBHASHIS GHOSHAL (variation: GHOSAL)
Ghoshal, Subhashis
of the American Statistical Association, 2010. 2. International Indian Statistical Association Young Researcher Statistical Institute Alumni Association Gold Medal for perfor- mance in the M. Stat. (1990). 8. Indian Statistical Institute Alumni Association Gold Medal for perfor- mance in the B. Stat. (1988). 2 #12;9. Prizes
Changala, P. Bryan, E-mail: bryan.changala@colorado.edu; Baraban, Joshua H.; Field, Robert W. [Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)] [Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States); Stanton, John F. [Department of Chemistry and Biochemistry, Institute for Theoretical Chemistry, The University of Texas at Austin, Austin, Texas 78712 (United States)] [Department of Chemistry and Biochemistry, Institute for Theoretical Chemistry, The University of Texas at Austin, Austin, Texas 78712 (United States); Merer, Anthony J. [Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan and Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1 (Canada)] [Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan and Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1 (Canada)
2014-01-14T23:59:59.000Z
Reduced dimension variational calculations have been performed for the rovibrational level structure of the S{sub 1} state of acetylene. The state exhibits an unusually complicated level structure, for various reasons. First, the potential energy surface has two accessible conformers, trans and cis. The cis conformer lies about 2700 cm{sup ?1} above the trans, and the barrier to cis-trans isomerization lies about 5000 cm{sup ?1} above the trans minimum. The trans vibrations ?{sub 4} (torsion) and ?{sub 6} (asym. bend) interact very strongly by Darling-Dennison and Coriolis resonances, such that their combination levels and overtones form polyads with unexpected structures. Both conformers exhibit very large x{sub 36} cross-anharmonicity since the pathway to isomerization is a combination of ?{sub 6} and ?{sub 3} (sym. bend). Near the isomerization barrier, the vibrational levels show an even-odd K-staggering of their rotational levels as a result of quantum mechanical tunneling through the barrier. The present calculations address all of these complications, and reproduce the observed K-structures of the bending and C–C stretching levels with good qualitative accuracy. It is expected that they will assist with the assignment of the irregular patterns near the isomerization barrier.
Mond, David
of dimension n. Find a diffeomorphism : G × TeG TG such that the diagram G × TeG // pr $$IIIIIIIIII TG p
Jet-controlled freeze valve for use in a glass melter
Routt, K.R.
1985-07-29T23:59:59.000Z
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.
1993-12-28T23:59:59.000Z
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.
Serns, Steven Leo
1972-01-01T23:59:59.000Z
. S. , Texas A&M University Directed by: Dr. Kirk Strawn Bluegill collected in four heated reservoirs in Texas (Lake Bastrop, Lake Nasworthy, North Lake and Lake Colorado City) were aged by scale-reading. Back-calculated length frequency... in the heated strata than the non-heated strata. Annuli could not be discerned on the scales of bluegill confined to the heated discharge-canal at Lake Colorado City. There was an inverse relationship between both age of the reservoir and megawatts per...
Magnetic ripple correction in tandem mirrors by ferromagnetic inserts
Hamilton, G.W.
1985-04-04T23:59:59.000Z
Magnetic ripple of 1% or more caused by discrete solenoid coils in the central cells of tandem mirrors may severely affect the MHD stability. The ripple amplitude can be reduced by an order of magnitude by ferromagnetic annuli inserted within the coils at the regions of ripple maxima. The inserts need not affect the accessibility, coil diameter, or capital cost, since large quantities of steel are required within the coils for the neutron blanket and shield. Design of the ripple correction is simplified and linearized by the cylindrical geometry and by the saturation of the ferromagnetic steel.
Raffray, A. René
2009-01-01T23:59:59.000Z
considerations) to enable coupling to an oxide dispersion-strengthened (ODS) ferritic steel manifold, to 1300 C
{Manifold Identification in Dual Averaging for Regularized Stochastic Online Learning Sangkyun Lee, Stephen ... Jieqiu Chen, Sam Burer. Convex Optimization
Universitat Regensburg Deformations of associative
Regensburg, UniversitĂ¤t - Naturwissenschaftliche FakultĂ¤t I
construction of compact holon- omy G2Âmanifolds [23]. As they are necessarily seven dimensional, one refers
Machine Vision and Applications DOI 10.1007/s00138-008-0169-4
Ge, Shuzhi Sam
. For example,Local tangent space alignment (LTSA) is a manifold learning algorithm efficient for many nonlinear
Gorban, Alexander N.
Activation entropy 51 Approximate invariant manifold 66 Arrhenius equation 51 BGK model 27 BKW-mode 256
Anderson, I.E.; Figliola, R.S.; Molnar, H.M.
1993-07-20T23:59:59.000Z
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.
Principles of algebraic geometry' (Griffiths and Harris).pdf
like a supernova. His conceptions of intrinsic geometry on a manifold, topology, function theory on a Riemann surface, birational transformations,.
Two-dimensional Ricci flow as a stochastic process
Marco Frasca
2009-01-29T23:59:59.000Z
We prove that, for a two-dimensional Riemannian manifold, the Ricci flow is obtained by a Wiener process.
Neural Network Modeling of Abrasive Flow Machining Alice E. Smith
Smith, Alice E.
-line controller for abrasive flow machining of automotive engine intake manifolds. The process is only observable of critical components. It has been applied in the aerospace, automotive, electronic and die-making industries that the Ford Contour SVT intake manifold will be an #12;aluminum alloy. An optimal intake manifold would
Anti-rewet felt for use in a papermaking machine
Beck, David A.
2003-09-09T23:59:59.000Z
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.
Apparatus and method for cooling a combustor cap
Zuo, Baifang; Washam, Roy Marshall; Wu, Chunyang
2014-04-29T23:59:59.000Z
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.
Gradient zone-boundary control in salt-gradient solar ponds
Hull, J.R.
1982-09-29T23:59:59.000Z
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.
The massive star population in M101. II. Spatial variations in the recent star formation history
Grammer, Skyler; Humphreys, Roberta M., E-mail: grammer@astro.umn.edu, E-mail: roberta@umn.edu [Minnesota Institute for Astrophysics, 116 Church Street SE, University of Minnesota, Minneapolis, MN 55455 (United States)
2014-09-01T23:59:59.000Z
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.
Fuel combustion exhibiting low NO{sub x} and CO levels
Keller, J.O.; Bramlette, T.T.; Barr, P.K.
1996-07-30T23:59:59.000Z
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.
Microchannel heat sink assembly
Bonde, W.L.; Contolini, R.J.
1992-03-24T23:59:59.000Z
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.
Shabelansky, Andrey Hanan
2012-01-01T23:59:59.000Z
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 ...
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 ...
Microsoft Word - EE Tech Roadmap Appx A Mar 2013 templates ELECTRONIC...
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
MAR CATRD4 Preliminary study how laser perforation of blueberry can improve fruit infusion with more yield and better quality CAT3 OSU Food Innovation Center QL CATRD5...
Jet impingement heat transfer in two-pass rotating rectangular channels
Zhang, Yuming
1996-01-01T23:59:59.000Z
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...
An Adaptive FPGA Architecture with Process Variation Compensation and Reduced Leakage
Najm, Farid N.
to their perfor- mance. Based on this classification, the architecture adap- tively body-biases these resources of the FPGA that have a positive slack. Overall, this architecture minimizes the timing variance of within
Numerical Modeling of Cased-hole Instability in High Pressure and High Temperature Wells
Shen, Zheng 1983-
2012-11-12T23:59:59.000Z
of cemented sections in High Pressure High Temperature (HPHT) wells. The existing analysis shows that, in the perforation zones, casing/cement is subject to instability, particularly in the presence of cavities. This dissertation focuses on the instability...
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
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
Sadeghi, Simin
2013-11-21T23:59:59.000Z
have been reviewed. Multivariate regression analysis has been applied to study correlations between production rate indicators (Initial Production, EUR) and completion attributes (Lateral length, number of fracture stages, number of perforation clusters...
Nozaki, Manabu
2012-07-16T23:59:59.000Z
Diversion methods are routinely used in both matrix acidizing and fracturing stimulation treatments. In this study, we focus on one of the classical mechanical diversion methods, ball sealers. Ball sealer diversion is used in cased and perforated...
Hege Langjord Nonlinear observer and
Johansen, Tor Arne
influenced by noise than sensors found in test rigs made for research and development. Motor vibration, including filtering of position for suppression of noise, shows best perfor- mance. The adaptation
Bhatti, Saleem N.
demands from the network. Once more scientists require the network to be pushed to the limits-delay requirements. High Energy Physics, Radio Astronomy or High Perfor- mance Steered Simulations cannot achieve
Center for Turbulence Research Proceedings of the Summer Program 2008
Prinz, Friedrich B.
channel flow and turbulent boundary-layer separation, have demonstrated the good perfor that stabilizing under- resolved simulations by upwind or non-oscillatory schemes is insufficient for accurately
Mandal, Esan
2004-09-30T23:59:59.000Z
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 unsolved research...
Staunton folio, Virginia-West Virginia
Darton, Nelson Horatio, 1865-1948.
1894-01-01T23:59:59.000Z
chain of studies. It tests the effects of the following on Barnett gas production in the core area (Denton, Wise, and Tarrant counties): * Barnett gross thickness, including the Forestburg formation that divides Barnett Shale. * Perforation footage...
Multi-mode Energy Management for Multi-tier Server Tibor Horvath
Skadron, Kevin
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
GENOTYPE x ENVIRONMENT INTERACTIONS (1) J. C. BOWMAN
Boyer, Edmond
GENOTYPE x ENVIRONMENT INTERACTIONS (1) J. C. BOWMAN Department of Agriculture, University of Reading, Great Britain SUMMARY A genotype x environment interaction may be defined as a change in the relative perfor- mance of a 'environments
February 10, 2010, Human Resource Services Jacksonville Update
Mazzotti, Frank
/ Arizona State Univ Â Phoenix campus (2007) Â University of Miami / Florida Atlantic University Â Boca education. 1987/1988 Â 600 student weeks performed in Jacksonville 2008/2009 Â 3,242 student weeks perfor
Körner, Wolfgang; Urban, Daniel F.; Ramo, David Muńoz; Bristowe, Paul D.; Elsässer, Christian
2014-11-21T23:59:59.000Z
through contract No. NMP3-LA- 2010-246334 (ORAMA). The calculations at Cambridge were performed using the High Performance Computing Facility, Darwin, and also the UK national high perfor- mance computing service ARCHER, for which access was obtained via...
Research Paper Abstract: Studies with seedlings of tropical rainforest trees (Ca-
Bermingham, Eldredge
photosynthetic perfor- mance and growth. Seedlings were cultivated in pots at a field site in Central Panama (98N) and separated into two groups: (1) plants exposed to full solar radiation; (2) plants subjected to automatic
Boyer, Edmond
of lucerne meal (12 %) as a partial protein supplementation led to good growth perfor- mances during without lucerne meal. In the case of diets containing 15 per cent protein and supplemented with lysine
Fast Communication Mechanisms in Coarse-grained Dynamically Reconfigurable Array Architectures
Starzyk, Janusz A.
vari- ous problems that stem from access mechanisms, energy conservation, error rate, transmission**, Janusz Starzyk** **Ohio University Electrical and Computer Engineering Athens, OH 45701 USA e perfor- mance and flexibility for different challenging appli- cation areas, e. g. future broadband
Eeckhout, Lieven
Brief Contributions and practical way for estimating its impact on perfor- mance and energy consumption. Existing DVFS profitability impact of DVFS is proportional scaling, i.e., performance is assumed to scale proportionally with supply
Paulraj, Rajkumar
1999-01-01T23:59:59.000Z
: //people. qualcomm. corn/kern/pile. txt [Accessed April 1999]. [27) Rathke, B. , Schlager, M. , Wolisz, A. , "Systematic Measurement of TCP Perfor- mance over Wireless LANs, " Technical Report TKN-01BR98, Telecommunica- tion Networks Group, Dept...
Hill, Wendell T.
pea seeds between the folds of a moistened paper towel and place inside a clear, perforated plastic- slice off young weeds at the soil line or use a thick mulch to prevent weeds. · Watering Keep the root
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
Gadgil, A.; Garud, V.
1998-07-14T23:59:59.000Z
A UV disinfector with a gravity driven feed water delivery system and an air-suspended bare UV lamp are disclosed. The disinfector is hydrodynamically optimized with a laminerizing, perforated baffle wall, beveled treatment chamber, and outlet weir. 7 figs.
Fire suppressing apparatus. [sodium fires
Buttrey, K.E.
1980-12-19T23:59:59.000Z
Apparatus for smothering a liquid sodium fire comprises a pan, a perforated cover on the pan, and tubed depending from the cover and providing communication between the interior of the pan and the ambient atmosphere through the perforations in the cover. Liquid caught in the pan rises above the lower ends of the tubes and thus serves as a barrier which limits the amount of air entering the pan.
A numerical investigation of high-rate gas flow for gravel-packed completions
Forrest, James Kenyon
1983-01-01T23:59:59.000Z
A-2 Three-Dimensional Cylindrical Grid System for Simulation of Gravel-Packed Gas Well 58 D-I Perforation Model Schematic 74 INTRODUCTION In recent years, operators have produced gas at ultra high flow rates from shallow, unconsolidated sands... the application of "Systems Analysis" to cased-hole, gravel-packed wells. The second part concerns the numerical simulation of flow in perforations and gravel-packed wells. The method presently used by some operators to analyze the productivity of wells...
Estimation of vertical permeability from production data of wells in bottom water drive reservoirs
Tirek, Ali
1982-01-01T23:59:59.000Z
test data. This method is applicable if the well is producing or infecting fluid at a constant mass rate of flow through one of the perforation intervals. Hirasaki proposed ver tical pulse testing to estimate vertical . 7 permeability. He described... to the perforation intervals. Practical application of the theoretical model proposed by Falade and Brigham was g1ven in a second paper by the same authors with special consideration of the boundary effects. Raghavan and Clark proposed a technique to estimate...
Heat pipe wick with structural enhancement
Andraka, Charles E.; Adkins, Douglas R.; Moreno, James B.; Rawlinson, K. Scott; Showalter, Steven K.; Moss, Timothy A.
2003-11-18T23:59:59.000Z
Heat pipe wick structure wherein a stout sheet of perforated material overlays a high performance wick material such as stainless steel felt affixed to a substrate. The inventive structure provides a good flow path for working fluid while maintaining durability and structural stability independent of the structure (or lack of structure) associated with the wick material. In one described embodiment, a wick of randomly laid .about.8 micron thickness stainless steel fibers is sintered to a metal substrate and a perforated metal overlay.
Method of manufacturing a heat pipe wick with structural enhancement
Andraka, Charles E. (Albuquerque, NM); Adkins, Douglas R. (Albuquerque, NM); Moreno, James B. (Albuquerque, NM); Rawlinson, K. Scott (Albuquerque, NM); Showalter, Steven K. (Albuquerque, NM); Moss, Timothy A. (Albuquerque, NM)
2006-10-24T23:59:59.000Z
Heat pipe wick structure wherein a stout sheet of perforated material overlays a high performance wick material such as stainless steel felt affixed to a substrate. The inventive structure provides a good flow path for working fluid while maintaining durability and structural stability independent of the structure (or lack of structure) associated with the wick material. In one described embodiment, a wick of randomly laid .about.8 micron thickness stainless steel fibers is sintered to a metal substrate and a perforated metal overlay.
Calculation of Savannah River K Reactor Mark-22 assembly LOCA/ECS power limits
Fischer, S.R.; Farman, R.F.; Birdsell, S.A.
1992-02-01T23:59:59.000Z
This paper summarizes the results of TRAC-PF1/MOD3 calculations of Mark-22 fuel assembly of loss-of-coolant accident/emergency cooling system (LOCA/ECS) power limits for the Savannah River Site (SRS) K Reactor. This effort was part of a larger effort undertaken by the Los Alamos National Laboratory for the US Department of Energy to perform confirmatory power limits calculations for the SRS K Reactor. A method using a detailed three-dimensional (3D) TRAC model of the Mark-22 fuel assembly was developed to compute LOCA/ECS power limits. Assembly power was limited to ensure that no point on the fuel assembly walls would exceed the local saturation temperature. The detailed TRAC model for the Mark-22 assembly consisted of three concentric 3D vessel components which simulated the two targets, two fuel tubes, and three main flow channels of the fuel assembly. The model included 100% eccentricity between the assembly annuli and a 20% power tilt. Eccentricity in the radial alignment of the assembly annuli arises because axial spacer ribs that run the length of the fuel and targets are used. Wall-shear, interfacial-shear, and wall heat-transfer correlations were developed and implemented in TRAC-PF1/MOD3 specifically for modeling flow and heat transfer in the narrow ribbed annuli encountered in the Mark-22 fuel assembly design. We established the validity of these new constitutive models using separate-effects benchmarks. TRAC system calculations of K Reactor indicated that the limiting ECS-phase accident is a double-ended guillonite break in a process water line at the pump discharge (i.e., a PDLOCA). The fuel assembly with the minimum cooling potential is identified from this system calculation. Detailed assembly calculations then were performed using appropriate boundary conditions obtained from this limiting system LOCA. Coolant flow rates and pressure boundary conditions were obtained from this system calculation and applied to the detailed assembly model.
Calculation of Savannah River K Reactor Mark-22 assembly LOCA/ECS power limits
Fischer, S.R.; Farman, R.F.; Birdsell, S.A.
1992-01-01T23:59:59.000Z
This paper summarizes the results of TRAC-PF1/MOD3 calculations of Mark-22 fuel assembly of loss-of-coolant accident/emergency cooling system (LOCA/ECS) power limits for the Savannah River Site (SRS) K Reactor. This effort was part of a larger effort undertaken by the Los Alamos National Laboratory for the US Department of Energy to perform confirmatory power limits calculations for the SRS K Reactor. A method using a detailed three-dimensional (3D) TRAC model of the Mark-22 fuel assembly was developed to compute LOCA/ECS power limits. Assembly power was limited to ensure that no point on the fuel assembly walls would exceed the local saturation temperature. The detailed TRAC model for the Mark-22 assembly consisted of three concentric 3D vessel components which simulated the two targets, two fuel tubes, and three main flow channels of the fuel assembly. The model included 100% eccentricity between the assembly annuli and a 20% power tilt. Eccentricity in the radial alignment of the assembly annuli arises because axial spacer ribs that run the length of the fuel and targets are used. Wall-shear, interfacial-shear, and wall heat-transfer correlations were developed and implemented in TRAC-PF1/MOD3 specifically for modeling flow and heat transfer in the narrow ribbed annuli encountered in the Mark-22 fuel assembly design. We established the validity of these new constitutive models using separate-effects benchmarks. TRAC system calculations of K Reactor indicated that the limiting ECS-phase accident is a double-ended guillonite break in a process water line at the pump discharge (i.e., a PDLOCA). The fuel assembly with the minimum cooling potential is identified from this system calculation. Detailed assembly calculations then were performed using appropriate boundary conditions obtained from this limiting system LOCA. Coolant flow rates and pressure boundary conditions were obtained from this system calculation and applied to the detailed assembly model.
Building Blocks in Turaev-Viro Theory
Radu Ionicioiu
1996-12-02T23:59:59.000Z
We study the form of the Turaev-Viro partition function Z(M) for different 3-manifolds with boundary. We show that for $S^2$ boundaries Z(M) factorizes into a term which contains the boundary dependence and another which depends only on the topology of the underlying manifold. From this follows easily the formula for the connected sum of two manifolds Z(M # N). For general $T_g$ boundaries this factorization holds only in a particular case.
STUDY OF USING OXYGEN-ENRICHED COMBUSTION AIR FOR LOCOMOTIVE...
Office of Scientific and Technical Information (OSTI)
with specified efficiencies. The actual intake and exhaust valve events and the manifold control volumes and surface areas were obtained from a previous study conducted at the...
May 10, 2006 ... geometry, Balkan Journal of Geometry and its Applications, 3(2) (1998) 89 ... the steepest descent method in Riemannian manifolds, Balkan ...
Combustion optimization in a hydrogen-enhanced lean burn SI engine
Goldwitz, Joshua A. (Joshua Arlen), 1980-
2004-01-01T23:59:59.000Z
Lean operation of spark ignition (SI) automotive engines offers attractive performance incentives. Lowered combustion temperatures inhibit NO[sub]x pollutant formation while reduced manifold throttling minimizes pumping ...
area scattering phase: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
numerical value. Nathan Poliatzky 1993-04-04 7 Scattering phase asymptotics with fractal remainders Mathematical Physics (arXiv) Summary: For a Riemannian manifold (M,g)...
active fault detection: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
with wireless communications are the bedrock of an emerging are manifold from diet monitor- ing 18, activity detection 4, 3, and health crisis support 9. We focus...
Transformation Formula of the "2nd" Order Mock Theta Function
Kazuhiro Hikami
2006-04-04T23:59:59.000Z
We give a transformation formula for the ``2nd order'' mock theta function which was recently proposed in connection with the quantum invariant for the Seifert manifold.
analysis method determinacao: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Chunping Wang and Guillermo Sapiro Lawrence Carin Nonparametric by learning dynamic model in latent space Summary Lawrence Carin Nonparametric Bayesian Methods for Manifold...
apparent diffusion-weighted images: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
revised 28 March 2008; accepted 29 March 2008 Abstract Geometric distortion Qiu, Anqi 8 Multivariate General Linear Models (MGLM) on Riemannian Manifolds with Applications to...
CONDITIONING AND INITIAL ENLARGEMENT OF FILTRATION ON ...
2004-09-03T23:59:59.000Z
CSDES ON A MANIFOLD. 2303. [14] FITZSIMMONS, P., PITMAN, J. W. and YOR, M. (1993). Markovian bridges, construction, Palm interpretation and splicing.
Value distribution and potential theory
The standard. references .... fundamental group of Y : removing a finite set from a compact manifold does. not change ..... Amer. J. Math., 118 (1996), 1141-1151.
advanced digestive endoscopy: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
sets are topics of research. Virtual endoscopy is a promising new technique to explore hollow organs and anatomical cavities. The fields of application are manifold... Anna...
Hanson, Andrew J.
2011-01-01T23:59:59.000Z
torsion-free spacetime would correspond to the field-freeField Strength Covariant Constant Object Meissner Effect Topological Object Enclosing Manifold Inside Vortex Vortex Map Torsion
Ferrante, T.A.
1997-11-11T23:59:59.000Z
A modular robot may comprise a main body having a structure defined by a plurality of stackable modules. The stackable modules may comprise a manifold, a valve module, and a control module. The manifold may comprise a top surface and a bottom surface having a plurality of fluid passages contained therein, at least one of the plurality of fluid passages terminating in a valve port located on the bottom surface of the manifold. The valve module is removably connected to the manifold and selectively fluidically connects the plurality of fluid passages contained in the manifold to a supply of pressurized fluid and to a vent. The control module is removably connected to the valve module and actuates the valve module to selectively control a flow of pressurized fluid through different ones of the plurality of fluid passages in the manifold. The manifold, valve module, and control module are mounted together in a sandwich-like manner and comprise a main body. A plurality of leg assemblies are removably connected to the main body and are removably fluidically connected to the fluid passages in the manifold so that each of the leg assemblies can be selectively actuated by the flow of pressurized fluid in different ones of the plurality of fluid passages in the manifold. 12 figs.
Continuous Dynamical Systems Math 181 -Spring 2010
Jacobsen, Jon T.
will be an integral part of the course with examples including mechanical vibrations, biological rhythms, circuits, stable and unstable manifolds, fixed points and linearization, topological equivalence, , homoclinic
2014-10-28T23:59:59.000Z
Analysis for sub-Laplacians on functions and differential forms, Poincaré-Sobolev inequalities on sub-. Riemannian manifolds with Baudoin-Garofalo curvature ...
anti-collision algorithm based: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
angle convergent beam: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
analysis reveals convergent: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
algorithm based method: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
algorithm based non-polynomial: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
artificial convergent transcription: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
assessment algorithms based: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
axotomy reveals convergent: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
algorithm based descriptor: Topics by E-print Network
Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)
Algorithm Computer Technologies and Information Sciences Websites Summary: for LTSA in a special case. 1 Introduction Manifold learning (ML) methods have attracted...
Treatment of experimental asthma using a novel peptide inhibitor of the inducible T cell kinase
Guimond, David M.; Guimond, David M.
2012-01-01T23:59:59.000Z
supernatant -! small centrifuge tubes (4 per MegaPrep) forvacuum manifold -! centrifuge -! -20°C freezer Materials: -!freezer -! refrigerated centrifuge -! liquid nitrogen vessel
Generic identifiability and second-order sufficiency in tame convex ...
2009-01-19T23:59:59.000Z
Jan 19, 2009 ... is somehow pathological, or because of the failure of the typical ... identify the manifold and converge well, and standard sensitivity analysis.
The Poincare'-Lyapounov-Nekhoroshev theorem for involutory systems of vector fields
G. Gaeta
2006-03-05T23:59:59.000Z
We extend the Poincare'-Lyapounov-Nekhoroshev theorem from torus actions and invariant tori to general (non-abelian) involutory systems of vector fields and general invariant manifolds.
Global Non-perturbative Deformation Quantization of a Poisson Algebra
Luther Rinehart
2015-06-04T23:59:59.000Z
A proposed definition is given for the quantization of a Poisson algebra, taking the quantum product to be a geodesic on the manifold of associative products.
Zhang, Yawen
2011-01-01T23:59:59.000Z
the manifold was filled with 40 Torr CO (Praxair, UHP), 100Torr O 2 (Praxair, UHP), and abalance of He (Praxair, UHP) initially at atmospheric
Renzas, James R.
2010-01-01T23:59:59.000Z
the manifold was filled with 40 Torr CO (Praxair, UHP), 100Torr O 2 (Praxair, UHP), and abalance of He (Praxair, UHP) initially at atmospheric
Accelerated line-search and trust-region methods
2008-04-03T23:59:59.000Z
Apr 3, 2008 ... portant classes of descent schemes, with well-understood global .... cost functions on compact Riemannian manifolds, the trust-region method ...
TOWER OF COVERINGS OF QUASI-PROJECTIVE VARIETIES ...
2012-04-25T23:59:59.000Z
on a tower of coverings of a non-compact Kähler manifold of finite volume with reasonable geometric assumptions to its universal covering. Applicable examples ...
The Poincare-Lyapounov-Nekhoroshev theorem for involutory systems of vector fields
Gaeta, Giuseppe [Dipartimento di Matematica, Universita di Milano, via Saldini 50, I-20133 Milan (Italy)]. E-mail: gaeta@mat.unimi.it
2006-06-15T23:59:59.000Z
We extend the Poincare-Lyapounov-Nekhoroshev theorem from torus actions and invariant tori to general (non-abelian) involutory systems of vector fields and general invariant manifolds.
Experimental onset of flow instability testing by Creare, Inc. Book 1
Coutts, D.A.
1992-11-01T23:59:59.000Z
Flow excursions can occur during subcooled heated flow if the supply system is not adequate to meet the heated channel pressure demand. Available experimental flow instability (FI) data for ribbed annuli such as used in the SRS production reactors is very limited. Creare Inc. completed a series of FI tests which included two annular geometries; one of these included metallic ribs which separated the annulus into four sub-channels. This report summarizes the results of the onset of flow instability (OFI) testing which was completed by Creare in support of the SRS Reactor Restart Program. A copy of the final test report has been attached and the archival locations for the supporting documentation and electronic test data is also included. The purpose of this report is to: Archive the Creare Program data; inspect the data which has been archived; review the results presented by Creare; and evaluate if the Creare Program data may be used in critical applications.
Beaudoin, B. R.; Cohen, J. D.; Jones, D. H.; Marier, Jr, L. J.; Raab, H. F.
1972-06-20T23:59:59.000Z
Described is a light-water-moderated and -cooled nuclear breeder reactor of the seed-blanket type characterized by core modules comprising loosely packed blanket zones enriched with fissile fuel and axial zoning in the seed and blanket regions within each core module. Reactivity control over lifetime is achieved by axial displacement of movable seed zones without the use of poison rods in the embodiment illustrated. The seed is further characterized by a hydrogen-to-uranium-233 atom ratio in the range 10 to 200 and a uranium-233-to-thorium-232 atom ratio ranging from 0.012 to 0.200. The seed occupies from 10 to 35 percent of the core volume in the form of one or more individual islands or annuli. (NSA 26: 55130)
Joseph P. Conlon; Andrew J. Powell
2014-06-20T23:59:59.000Z
We further study a scenario in which a 3.55 keV X-ray line arises from decay of dark matter to an axion-like particle (ALP), that subsequently converts to a photon in astrophysical magnetic fields. We perform numerical simulations of Gaussian random magnetic fields with radial scaling of the magnetic field magnitude with the electron density, for both cool-core `Perseus' and non-cool-core `Coma' electron density profiles. Using these, we quantitatively study the resulting signal strength and morphology for cool-core and non-cool-core clusters. Our study includes the effects of fields of view that cover only the central part of the cluster, the effects of offset pointings on the radial decline of signal strength and the effects of dividing clusters into annuli. We find good agreement with current data and make predictions for future analyses and observations.
Fabrication procedures for manufacturing High Flux Isotope Reactor fuel elements - 2
Knight, R.W.; Morin, R.A.
1999-12-01T23:59:59.000Z
The original fabrication procedures written in 1968 delineated the manufacturing procedures at that time. Since 1968, there have been a number of procedural changes. This rewrite of the fabrication procedures incorporates these changes. The entire fuel core of this reactor is made up of two fuel elements. Each element consists of one annular array of fuel plates. These annuli are identified as the inner and outer fuel elements, since one fits inside the other. The inner element consists of 171 identical fuel plates, and the outer element contains 369 identical fuel plates differing slightly from those in the inner element. Both sets of fuel plates contain U{sub 3}O{sub 8} powder as the fuel, dispersed in an aluminum powder matrix and clad with aluminum. Procedures for manufacturing and inspection of the fuel elements are described and illustrated.
Toqan, M.A.; Paloposki, T.; Yu, T.; Teare, J.D.; Beer, J.M. [Massachusetts Inst. of Tech., Cambridge, MA (United States)
1989-12-01T23:59:59.000Z
Under contract from DOE-PETC, Combustion Engineering, Inc. undertook the lead-role in a multi-task R&D program aimed at development of a new burner system for coal-based fuels; the goal was that this burner system should be capable of being retrofitted in oil- or gas-fired industrial boilers, or usable in new units. In the first phase of this program a high efficiency advanced coal combustor was designed jointly by CE and MIT. Its burner is of the multiannular design with a fixed shrouded swirler in the center immediately surrounding the atomizer gun to provide the ``primary act,`` and three further annuli for the supply of the ``secondary air.`` The degree of rotation (swirl) in the secondary air is variable. The split of the combustion air into primary and secondary air flows serves the purpose of flame stabilization and combustion staging, the latter to reduce NO{sub x} formation.
Performance of a high efficiency advanced coal combustor
Toqan, M.A.; Paloposki, T.; Yu, T.; Teare, J.D.; Beer, J.M. (Massachusetts Inst. of Tech., Cambridge, MA (United States))
1989-12-01T23:59:59.000Z
Under contract from DOE-PETC, Combustion Engineering, Inc. undertook the lead-role in a multi-task R D program aimed at development of a new burner system for coal-based fuels; the goal was that this burner system should be capable of being retrofitted in oil- or gas-fired industrial boilers, or usable in new units. In the first phase of this program a high efficiency advanced coal combustor was designed jointly by CE and MIT. Its burner is of the multiannular design with a fixed shrouded swirler in the center immediately surrounding the atomizer gun to provide the primary act,'' and three further annuli for the supply of the secondary air.'' The degree of rotation (swirl) in the secondary air is variable. The split of the combustion air into primary and secondary air flows serves the purpose of flame stabilization and combustion staging, the latter to reduce NO{sub x} formation.
Fuel combustion exhibiting low NO.sub.x and CO levels
Keller, Jay O. (3534 Brunell Dr., Oakland, CA 94602); Bramlette, T. Tazwell (2105 Canyon Lakes Dr., San Ramon, CA 94583); Barr, Pamela K. (294 Joyce St., Livermore, CA 94550)
1996-01-01T23:59:59.000Z
Method and apparatus for safely combusting a fuel in such manner that very low levels of NO.sub.x and CO are produced. The apparatus comprises an inlet line (12) containing a fuel and an inlet line (18) containing an oxidant. Coupled to the fuel line (12) and to the oxidant line (18) is a mixing means (11,29,33,40) for thoroughly mixing the fuel and the oxidant without combusting them. Coupled to the mixing means (11,29,33,40) is a means for injecting the mixed fuel and oxidant, in the form of a large-scale fluid dynamic structure (8), into a combustion region (2). Coupled to the combustion region (2) is a means (1,29,33) for producing a periodic flow field within the combustion region (2) 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 (1), a rotating band (29), or a rotating cylinder (33) within an acoustic chamber (32) positioned upstream or downstream of the region (2) of combustion. The mixing means can be a one-way flapper valve (11); a rotating cylinder (33); a rotating band (29) having slots (31) that expose open ends (20,21) of said fuel inlet line (12) and said oxidant inlet line (18) simultaneously; or a set of coaxial fuel annuli (43) and oxidizer annuli (42,44). The means for producing a periodic flow field (1, 29, 33) 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 (2).
Construction of the noncommutative complex ball
Wang, Zhituo, E-mail: zhituo@mat.uniroma3.it [Dipartimento di Matematica, Universitŕ di Roma Tre Largo S. L. Murialdo 1, 00146 Roma (Italy)
2014-09-15T23:59:59.000Z
We describe the construction of the noncommutative complex ball whose commutative analog is the Hermitian symmetric space D = SU(m, 1)/U(m), with the method of coherent state quantization. In the commutative limit, we obtain the standard manifold. We also consider a quantum field theory model on the noncommutative manifold.
Multipole analysis in cosmic topology
Peter Kramer
2010-09-29T23:59:59.000Z
Low multipole amplitudes in the Cosmic Microwave Background CMB radiation can be explained by selection rules from the underlying multiply-connected homotopy. We apply a multipole analysis to the harmonic bases and introduce point symmetry.We give explicit results for two cubic 3-spherical manifolds and lowest polynomial degrees, and derive three new spherical 3-manifolds.
Grimes, Patrick G. (Westfield, NJ); Einstein, Harry (Springfield, NJ); Bellows, Richard J. (Westfield, NJ)
1988-01-12T23:59:59.000Z
A tunnel protected electrochemical device features channels fluidically communicating between manifold, tunnels and cells. The channels are designed to provide the most efficient use of auxiliary power. The channels have a greater hydraulic pressure drop and electrical resistance than the manifold. This will provide a design with the optimum auxiliary energy requirements.
A History of Duality in Algebraic Topology James C. Becker and ...
1999-02-05T23:59:59.000Z
Let Mn be an n–manifold oriented by ?, and let K ? L be compact subsets ..... where D = µ?(?)/ ,u ? Hs?n(Mn), ?u is the Thom homomorphism, and v = D(u). Since D ..... 27 had been extended to fibre bundles whose fibre was a manifold with ...
Lozano-Robledo, Alvaro
form on a manifold is related to exterior powers of the dual space of the tangent space of a manifoldEXTERIOR POWERS KEITH CONRAD 1. Introduction Let R be a commutative ring. Unless indicated the alternating multilinear functions on Mk: the exterior power k(M). It is a certain quotient module of Mk
Tutorial on Semi-Supervised Learning Xiaojin Zhu
Zhu, Xiaojin "Jerry"
is SSL? Mixture Models Co-training and Multiview Algorithms Manifold Regularization and Graph-Based Algorithms S3VMs and Entropy Regularization 2 Part II Theory of SSL Online SSL Multimanifold SSL Human SSL Outline 1 Part I What is SSL? Mixture Models Co-training and Multiview Algorithms Manifold Regularization
IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 23, NO. 3, AUGUST 2008 877 Electricity Price Curve Modeling
Huo, Xiaoming
--Electricity forward curve, electricity spot price, forecasting, locational marginal price, manifold learning. IIEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 23, NO. 3, AUGUST 2008 877 Electricity Price Curve approach for the modeling and analysis of electricity price curves by ap- plying the manifold learning
Classical field theory. Advanced mathematical formulation
G. Sardanashvily
2009-03-04T23:59:59.000Z
In contrast with QFT, classical field theory can be formulated in strict mathematical terms of fibre bundles, graded manifolds and jet manifolds. Second Noether theorems provide BRST extension of this classical field theory by means of ghosts and antifields for the purpose of its quantization.
university-logo Affine space forms and hyperbolic geometry
Goldman, William
university-logo Affine space forms and hyperbolic geometry 3-dimensional affine space forms University of Singapore #12;university-logo Affine space forms and hyperbolic geometry Euclidean manifolds. #12;university-logo Affine space forms and hyperbolic geometry Euclidean manifolds When can a group G
Enhanced carbon-oxygen log interpretations using supplemental log curves
Wyatt, D.F. Jr.; Jacobson, L.A.; Fox, P.
1994-12-31T23:59:59.000Z
Supplemental measurements from induced nuclear spectrometry tools are examined to demonstrate what additional information they provide about the well and reservoir conditions. Logs in shut-in wells from Indonesia provide examples of oxygen activation measurements showing cross-flow from one reservoir to another via open perforations. Leaking squeezed perforations were also observed. An example from Alaska shows radioactive scale build-up in the casing which spectral analysis identifies as a mixture of uranium and thorium salts. Another log, where the casing fluid was replaced with crude oil, demonstrates a technique for identifying cement channels. Logs from Nigeria comparing oil saturation estimates before and after a squeeze operation illustrate the effect of casing fluid flushing of the formation through open perforations. Understanding the diagnostic character of these curves leads to higher confidence in the overall log interpretation process.
Benjamin Langhorst; Thomas M Lillo; Henry S Chu
2014-05-01T23:59:59.000Z
A statistics based ballistic test method is presented for use when comparing multiple groups of test articles of unknown relative ballistic perforation resistance. The method is intended to be more efficient than many traditional methods for research and development testing. To establish the validity of the method, it is employed in this study to compare test groups of known relative ballistic performance. Multiple groups of test articles were perforated using consistent projectiles and impact conditions. Test groups were made of rolled homogeneous armor (RHA) plates and differed in thickness. After perforation, each residual projectile was captured behind the target and its mass was measured. The residual masses measured for each test group were analyzed to provide ballistic performance rankings with associated confidence levels. When compared to traditional V50 methods, the residual mass (RM) method was found to require fewer test events and be more tolerant of variations in impact conditions.
Engineering the initial state in broadband population inversion
Bo Y. Chang; Sheokmin Shin; Ignacio R. Sola
2015-03-03T23:59:59.000Z
Quantum systems with sublevel structures prevent full population inversion from one manifold of sublevels to the other using strong ultrafast resonant pulses. In this work we explain the mechanism by which this population transfer is blocked. We then develop a novel concept of geometric control, assuming full or partial coherent manipulation within the manifolds and show that by preparing specific coherent superpositions in the initial manifold, full population inversion or full population blockade, {\\it i.e} laser-induced transparency, can be achieved. In particular, by parallel population transfer we show how population inversion between the manifolds can be obtained with minimal pulse area. As the number of sublevels increases, population inversion can overcome the pulse area theorem at the expense of full control over the initial manifold of sublevels.
Narrow groove welding gas diffuser assembly and welding torch
Rooney, Stephen J. (East Berne, NY)
2001-01-01T23:59:59.000Z
A diffuser assembly is provided for narrow groove welding using an automatic gas tungsten arc welding torch. The diffuser assembly includes a manifold adapted for adjustable mounting on the welding torch which is received in a central opening in the manifold. Laterally extending manifold sections communicate with a shield gas inlet such that shield gas supplied to the inlet passes to gas passages of the manifold sections. First and second tapered diffusers are respectively connected to the manifold sections in fluid communication with the gas passages thereof. The diffusers extend downwardly along the torch electrode on opposite sides thereof so as to release shield gas along the length of the electrode and at the distal tip of the electrode. The diffusers are of a transverse width which is on the order of the thickness of the electrode so that the diffusers can, in use, be inserted into a narrow welding groove before and after the electrode in the direction of the weld operation.
High specific power, direct methanol fuel cell stack
Ramsey, John C. (Los Alamos, NM); Wilson, Mahlon S. (Los Alamos, NM)
2007-05-08T23:59:59.000Z
The present invention is a fuel cell stack including at least one direct methanol fuel cell. A cathode manifold is used to convey ambient air to each fuel cell, and an anode manifold is used to convey liquid methanol fuel to each fuel cell. Tie-bolt penetrations and tie-bolts are spaced evenly around the perimeter to hold the fuel cell stack together. Each fuel cell uses two graphite-based plates. One plate includes a cathode active area that is defined by serpentine channels connecting the inlet manifold with an integral flow restrictor to the outlet manifold. The other plate includes an anode active area defined by serpentine channels connecting the inlet and outlet of the anode manifold. Located between the two plates is the fuel cell active region.
Engine Cylinder Temperature Control
Kilkenny, Jonathan Patrick (Peoria, IL); Duffy, Kevin Patrick (Metamora, IL)
2005-09-27T23:59:59.000Z
A method and apparatus for controlling a temperature in a combustion cylinder in an internal combustion engine. The cylinder is fluidly connected to an intake manifold and an exhaust manifold. The method and apparatus includes increasing a back pressure associated with the exhaust manifold to a level sufficient to maintain a desired quantity of residual exhaust gas in the cylinder, and varying operation of an intake valve located between the intake manifold and the cylinder to an open duration sufficient to maintain a desired quantity of fresh air from the intake manifold to the cylinder, wherein controlling the quantities of residual exhaust gas and fresh air are performed to maintain the temperature in the cylinder at a desired level.
Adjustable flow rate controller for polymer solutions
Jackson, Kenneth M. (Bartlesville, OK)
1981-01-01T23:59:59.000Z
An adjustable device for controlling the flow rate of polymer solutions which results in only little shearing of the polymer molecules, said device comprising an inlet manifold, an outlet manifold, a plurality of tubes capable of providing communication between said inlet and outlet manifolds, said tubes each having an internal diameter that is smaller than that of the inlet manifold and large enough to insure that viscosity of the polymer solution passing through each said tube will not be reduced more than about 25 percent, and a valve associated with each tube, said valve being capable of opening or closing communication in that tube between the inlet and outlet manifolds, each said valve when fully open having a diameter that is substantially at least as great as that of the tube with which it is associated.
Maru, Hansraj C. (Brookfield Center, CT); Farooque, Mohammad (Huntington, CT)
1984-01-01T23:59:59.000Z
A fuel cell system comprising a fuel cell including first and second electrolyte-communicative passage means, a third electrolyte-isolated passage means in thermal communication with a heat generating surface of the cell, independent first, second and third input manifolds for the first, second and third passage means, the first input manifold being adapted to be connected to a first supply for a first process gas and one of the second and third input manifold means being adapted to be connected to a second supply for a second process gas, and means for conveying a portion of the gas passing out of the passage means fed by the one input manifold means to the other of the second and third input manifold means.
Coal-feeding mechanism for a fluidized bed combustion chamber
Gall, Robert L. (Morgantown, WV)
1981-01-01T23:59:59.000Z
The present invention is directed to a fuel-feeding mechanism for a fluidized bed combustor. In accordance with the present invention a perforated conveyor belt is utilized in place of the fixed grid normally disposed at the lower end of the fluidized bed combustion zone. The conveyor belt is fed with fuel, e.g. coal, at one end thereof so that the air passing through the perforations dislodges the coal from the belt and feeds the coal into the fluidized zone in a substantially uniform manner.
Developing a tight gas sand advisor for completion and stimulation in tight gas reservoirs worldwide
Bogatchev, Kirill Y
2008-10-10T23:59:59.000Z
should be initiated in perforation (Manrique, Bjornen, Ehlig-Economides24). Ramirez et al.25 suggested that for a production test in high a pressure/high temperature exploration TGS wells, propellant-assisted perforating could be an attractive... promotes grain-to-grain contact, and remains as a liquid until it is fully cured downhole. A variety of LRS products was specially formulated to accommodate all temperature ranges: a low-temperature, two-component, epoxy system (70° F - 225° F); a high-temperature...
Shah, Suresh Somalal
1964-01-01T23:59:59.000Z
of the fish, especially tail of the fish, fins and size of the scales, made it difficult to obtain uniform readings. In a non-perforated drum at slow rotation, 5 to 10 rpm, the sticky nature of the fish provided a high apparent coefficient of friction... in Design Features of Prototype Process Equipment Suggested by this Investigation IX Bibliography vii 20 24 30 50 70 79 ABSTRACT A digester-washer with a perforated, horizontal, rotating drum has been developed to replace both the vertical...
Fail-safe storage rack for irradiated fuel rod assemblies
Lewis, D.R.
1993-03-23T23:59:59.000Z
A fail-safe storage rack is provided for interim storage of spent but radioactive nuclear fuel rod assemblies. The rack consists of a checkerboard array of substantially square, elongate receiving tubes fully enclosed by a double walled container, the outer wall of which is imperforate for liquid containment and the inner wall of which is provided with perforations for admitting moderator liquid flow to the elongate receiving tubes, the liquid serving to take up waste heat from the stored nuclear assemblies and dissipate same to the ambient liquid reservoir. A perforated cover sealing the rack facilitates cooling liquid entry and dissipation.
Unfolding-based corrector estimates for a reaction-diffusion system predicting concrete corrosion
Fatima, Tasnim; Ptashnyk, Mariya
2011-01-01T23:59:59.000Z
We use the periodic unfolding technique to derive corrector estimates for a reaction-diffusion system describing concrete corrosion penetration in the sewer pipes. The system, defined in a periodically-perforated domain, is semi-linear, partially dissipative, and coupled via a non-linear ordinary differential equation posed on the solid-water interface at the pore level. After discussing the solvability of the pore scale model, we apply the periodic unfolding techniques (adapted to treat the presence of perforations) not only to get upscaled model equations, but also to prepare a proper framework for getting a convergence rate (corrector estimates) of the averaging procedure.
Method to prevent/mitigate steam explosions in casting pits
Taleyarkhan, Rusi P. (Knoxville, TN)
1996-01-01T23:59:59.000Z
Steam explosions can be prevented or mitigated during a metal casting process by the placement of a perforated flooring system in the casting pit. An upward flow of compressed gas through this perforated flooring system is introduced during the casting process to produce a buffer layer between any spilled molten metal and the cooling water in the reservoir. This buffer layer provides a hydrodynamic layer which acts to prevent or mitigate steam explosions resulting from hot, molten metal being spilled into or onto the cooling water.
Fail-safe storage rack for irradiated fuel rod assemblies
Lewis, Donald R. (Pocatello, ID)
1993-01-01T23:59:59.000Z
A fail-safe storage rack is provided for interim storage of spent but radioactive nuclear fuel rod assemblies. The rack consists of a checkerboard array of substantially square, elongate receiving tubes fully enclosed by a double walled container, the outer wall of which is imperforate for liquid containment and the inner wall of which is provided with perforations for admitting moderator liquid flow to the elongate receiving tubes, the liquid serving to take up waste heat from the stored nuclear assemblies and dissipate same to the ambient liquid reservoir. A perforated cover sealing the rack facilitates cooling liquid entry and dissipation.
Battery venting system and method
Casale, T.J.; Ching, L.K.W.; Baer, J.T.; Swan, D.H.
1999-01-05T23:59:59.000Z
Disclosed herein is a venting mechanism for a battery. The venting mechanism includes a battery vent structure which is located on the battery cover and may be integrally formed therewith. The venting mechanism includes an opening extending through the battery cover such that the opening communicates with a plurality of battery cells located within the battery case. The venting mechanism also includes a vent manifold which attaches to the battery vent structure. The vent manifold includes a first opening which communicates with the battery vent structure opening and second and third openings which allow the vent manifold to be connected to two separate conduits. In this manner, a plurality of batteries may be interconnected for venting purposes, thus eliminating the need to provide separate vent lines for each battery. The vent manifold may be attached to the battery vent structure by a spin-welding technique. To facilitate this technique, the vent manifold may be provided with a flange portion which fits into a corresponding groove portion on the battery vent structure. The vent manifold includes an internal chamber which is large enough to completely house a conventional battery flame arrester and overpressure safety valve. In this manner, the vent manifold, when installed, lessens the likelihood of tampering with the flame arrester and safety valve. 8 figs.
Battery venting system and method
Casale, Thomas J. (Aurora, CO); Ching, Larry K. W. (Littleton, CO); Baer, Jose T. (Gaviota, CA); Swan, David H. (Monrovia, CA)
1999-01-05T23:59:59.000Z
Disclosed herein is a venting mechanism for a battery. The venting mechanism includes a battery vent structure which is located on the battery cover and may be integrally formed therewith. The venting mechanism includes an opening extending through the battery cover such that the opening communicates with a plurality of battery cells located within the battery case. The venting mechanism also includes a vent manifold which attaches to the battery vent structure. The vent manifold includes a first opening which communicates with the battery vent structure opening and second and third openings which allow the vent manifold to be connected to two separate conduits. In this manner, a plurality of batteries may be interconnected for venting purposes, thus eliminating the need to provide separate vent lines for each battery. The vent manifold may be attached to the battery vent structure by a spin-welding technique. To facilitate this technique, the vent manifold may be provided with a flange portion which fits into a corresponding groove portion on the battery vent structure. The vent manifold includes an internal chamber which is large enough to completely house a conventional battery flame arrester and overpressure safety valve. In this manner, the vent manifold, when installed, lessens the likelihood of tampering with the flame arrester and safety valve.
Battery Vent Mechanism And Method
Ching, Larry K. W. (Littleton, CO)
2000-02-15T23:59:59.000Z
Disclosed herein is a venting mechanism for a battery. The venting mechanism includes a battery vent structure which is located on the battery cover and may be integrally formed therewith. The venting mechanism includes an opening extending through the battery cover such that the opening communicates with a plurality of battery cells located within the battery case. The venting mechanism also includes a vent manifold which attaches to the battery vent structure. The vent manifold includes a first opening which communicates with the battery vent structure opening and second and third openings which allow the vent manifold to be connected to two separate conduits. In this manner, a plurality of batteries may be interconnected for venting purposes, thus eliminating the need to provide separate vent lines for each battery. The vent manifold may be attached to the battery vent structure by a spin-welding technique. To facilitate this technique, the vent manifold may be provided with a flange portion which fits into a corresponding groove portion on the battery vent structure. The vent manifold includes an internal chamber which is large enough to completely house a conventional battery flame arrester and overpressure safety valve. In this manner, the vent manifold, when installed, lessens the likelihood of tampering with the flame arrester and safety valve.
Combustor with two stage primary fuel assembly
Sharifi, Mehran (Winter Springs, FL); Zolyomi, Wendel (Oviedo, FL); Whidden, Graydon Lane (Orlando, FL)
2000-01-01T23:59:59.000Z
A combustor for a gas turbine having first and second passages for pre-mixing primary fuel and air supplied to a primary combustion zone. The flow of fuel to the first and second pre-mixing passages is separately regulated using a single annular fuel distribution ring having first and second row of fuel discharge ports. The interior portion of the fuel distribution ring is divided by a baffle into first and second fuel distribution manifolds and is located upstream of the inlets to the two pre-mixing passages. The annular fuel distribution ring is supplied with fuel by an annular fuel supply manifold, the interior portion of which is divided by a baffle into first and second fuel supply manifolds. A first flow of fuel is regulated by a first control valve and directed to the first fuel supply manifold, from which the fuel is distributed to first fuel supply tubes that direct it to the first fuel distribution manifold. From the first fuel distribution manifold, the first flow of fuel is distributed to the first row of fuel discharge ports, which direct it into the first pre-mixing passage. A second flow of fuel is regulated by a second control valve and directed to the second fuel supply manifold, from which the fuel is distributed to second fuel supply tubes that direct it to the second fuel distribution manifold. From the second fuel distribution manifold, the second flow of fuel is distributed to the second row of fuel discharge ports, which direct it into the second pre-mixing passage.
M Theory Extensions of T Duality
John H. Schwarz
1996-01-15T23:59:59.000Z
T duality expresses the equivalence of a superstring theory compactified on a manifold K to another (possibly the same) superstring theory compactified on a dual manifold K'. The volumes of K and K' are inversely proportional. In this talk we consider two M theory generalizations of T duality: (i) M theory compactified on a torus is equivalent to type IIB superstring theory compactified on a circle and (ii) M theory compactified on a cylinder is equivalent to SO(32) superstring theory compactified on a circle. In both cases the size of the circle is proportional to the -3/4 power of the area of the dual manifold.
Chern-Simons classes of flat connections on supermanifolds
JN Iyer; Un Iyer
2007-07-16T23:59:59.000Z
In this note we define Chern-Simons classes of a superconnection $D+L$ on a complex supervector bundle $E$ such that $D$ is flat and preserves the grading, and $L$ is an odd endomorphism of $E$ on a supermanifold. As an application we obtain a definition of Chern-Simons classes of a (not necessarily flat) morphism between flat vector bundles on a smooth manifold. We extend Reznikov's theorem on triviality of these classes when the manifold is a compact K\\"ahler manifold or a smooth complex quasi--projective variety, in degrees > 1.
Chern-Simons classes of flat connections on supermanifolds
Iyer, JN
2007-01-01T23:59:59.000Z
In this note we define Chern-Simons classes of a superconnection $D+L$ on a complex supervector bundle $E$ such that $D$ is flat and preserves the grading, and $L$ is an odd endomorphism of $E$ on a supermanifold. As an application we obtain a definition of Chern-Simons classes of a (not necessarily flat) morphism between flat vector bundles on a smooth manifold. We extend Reznikov's theorem on triviality of these classes when the manifold is a compact K\\"ahler manifold or a smooth complex quasi--projective variety, in degrees > 1.
On the configuration space topology in general relativity
Domenico Giulini
1993-01-25T23:59:59.000Z
The configuration-space topology in canonical General Relativity depends on the choice of the initial data 3-manifold. If the latter is represented as a connected sum of prime 3-manifolds, the topology receives contributions from all configuration spaces associated to each individual prime factor. There are by now strong results available concerning the diffeomorphism group of prime 3-manifolds which are exploited to examine the topology of the configuration spaces in terms of their homotopy groups. We explicitly show how to obtain these for the class of homogeneous spherical primes, and communicate the results for all other known primes except the non-sufficiently large ones of infinite fundamental group.
Lamination cooling system formation method
Rippel, Wally E. (Altadena, CA); Kobayashi, Daryl M. (Monrovia, CA)
2012-06-19T23:59:59.000Z
An electric motor, transformer or inductor having a cooling system. A stack of laminations have apertures at least partially coincident with apertures of adjacent laminations. The apertures define straight or angled cooling-fluid passageways through the lamination stack. Gaps between the adjacent laminations are sealed by injecting a heat-cured sealant into the passageways, expelling excess sealant, and heat-curing the lamination stack. Manifold members adjoin opposite ends of the lamination stack, and each is configured with one or more cavities to act as a manifold to adjacent passageway ends. Complex manifold arrangements can create bidirectional flow in a variety of patterns.
Lamination cooling system formation method
Rippel, Wally E [Altadena, CA; Kobayashi, Daryl M [Monrovia, CA
2009-05-12T23:59:59.000Z
An electric motor, transformer or inductor having a cooling system. A stack of laminations have apertures at least partially coincident with apertures of adjacent laminations. The apertures define straight or angled cooling-fluid passageways through the lamination stack. Gaps between the adjacent laminations are sealed by injecting a heat-cured sealant into the passageways, expelling excess sealant, and heat-curing the lamination stack. Manifold members adjoin opposite ends of the lamination stack, and each is configured with one or more cavities to act as a manifold to adjacent passageway ends. Complex manifold arrangements can create bidirectional flow in a variety of patterns.
Improved Direct Methanol Fuel Cell Stack
Wilson, Mahlon S. (Los Alamos, NM); Ramsey, John C. (Los Alamos, NM)
2005-03-08T23:59:59.000Z
A stack of direct methanol fuel cells exhibiting a circular footprint. A cathode and anode manifold, tie-bolt penetrations and tie-bolts are located within the circular footprint. Each fuel cell uses two graphite-based plates. One plate includes a cathode active area that is defined by serpentine channels connecting the inlet and outlet cathode manifold. The other plate includes an anode active area defined by serpentine channels connecting the inlet and outlet of the anode manifold, where the serpentine channels of the anode are orthogonal to the serpentine channels of the cathode. Located between the two plates is the fuel cell active region.
Relativity theory in time-space
Ákos G. Horváth
2014-11-05T23:59:59.000Z
The concept of time-space defined in an earlier paper of the author is certain generalization of the so-called space-time. In this paper we introduce the concept of time-space manifold. In the homogeneous case, the time-space manifold is a differentiable manifold with such tangent spaces which have certain fixed time-space structure. We redefine the fundamental concepts of global relativity theory with respect to this general situation. We study the concepts of affine connection, parallel transport, curvature tensor and Einstein equation, respectively.
Cusps of Hilbert modular varieties
McReynolds, D B
2007-01-01T23:59:59.000Z
Motivated by a question of Hirzebruch on the possible topological types of cusp cross-sections of Hilbert modular varieties, we give a necessary and sufficient condition for a manifold M to be diffeomorphic to a cusp cross-section of a Hilbert modular variety. Specialized to Hilbert modular surfaces, this proves that every Sol 3-manifold is diffeomorphic to a cusp cross-section of a (generalized) Hilbert modular surface. We also deduce an obstruction to geometric bounding in this setting. Consequently, there exist Sol 3-manifolds that cannot arise as a cusp cross-section of a 1-cusped nonsingular Hilbert modular surface.
Diagnostic Characterization of High Power Lithium-Ion Batteries for Use in Hybrid Electric Vehicles
Diagnostic Characterization of High Power Lithium-Ion Batteries for Use in Hybrid Electric Vehicles for perfor- mance characterization of these batteries in HEV applications in contrast to the constant microscopy, atomic force microscopy, gas chromatography, etc., were used to characterize the anode, cathode
High temperature liquid level sensor
Tokarz, Richard D. (West Richland, WA)
1983-01-01T23:59:59.000Z
A length of metal sheathed metal oxide cable is perforated to permit liquid access to the insulation about a pair of conductors spaced close to one another. Changes in resistance across the conductors will be a function of liquid level, since the wetted insulation will have greater electrical conductivity than that of the dry insulation above the liquid elevation.
Towards a Conceptual Model of a Bio-Robotic AUV: Pectoral Fin Hydrodynamics
Mittal, Rajat
of these technological problems whereas the FY03 ONR MURI program (Integrated Artificial Mus- cle, High-Lift Bio of marine mammals systems (MMS), specifically dolphins. The key technological advances required in order to reach this goal are: 1) An engineered sonar system that matches the perfor- mance of MMS. 2) An AUV
Preparation and Characterization of Monolithic Porous Capillary Columns Loaded with
Zare, Richard N.
of the octadecylsilica (ODS) stationary phase occur in a single step. The presence of the particles in the column greatly the particles and the sol-gel matrix. The perfor- mance of these sol-gel/ODS capillary columns was evalu- ated in columns with immobilized 3-µm ODS par- ticles. The efficiency and resolution are enhanced when 3-µm ODS
OD17-13/2 Page 1 OSTEOMYELITIS
OD17-13/2 Page 1 CHAPTER 13 OSTEOMYELITIS Suppurative osteomyelitis Garrés osteomyelitis Actinomycotic osteomyelitis Osteoradionecrosis #12;OD17-13/2 Page 2 SUPPURATIVE OSTEOMYELITIS Osteomyelitis by the suppuration perforating the #12;OD17-13/2 Page 3 cortical bone and periosteum. The fistulous tract discharges
AN IMPROVED SOFT FEEDBACK V-BLAST DETECTION TECHNIQUE FOR TURBO-MIMO SYSTEMS
Singer, Andrew C
AN IMPROVED SOFT FEEDBACK V-BLAST DETECTION TECHNIQUE FOR TURBO-MIMO SYSTEMS Jun Won Choi*, Andrew-demapper) and the channel decoder exchange soft (extrinsic) information to iteratively improve system perfor- mance. Hence In this paper, an improved minimum mean square error (MMSE) soft feedback detector, called the soft input, soft
High-performance Si microwire photovoltaics Michael D. Kelzenberg,a
Atwater, Harry
High-performance Si microwire photovoltaics Michael D. Kelzenberg,a Daniel B. Turner-Evans,a Morgan for low- cost, thin-film photovoltaics. Here, we demonstrate VLS-grown Si microwires that have suitable electrical properties for high-perfor- mance photovoltaic applications, including long minority
Cu2ZnSnS4 nanocrystals and graphene quantum dots for photovoltaics Xukai Xinab
Lin, Zhiqun
Cu2ZnSnS4 nanocrystals and graphene quantum dots for photovoltaics Jun Wang,a Xukai Xinab advances in the synthesis and utilization of CZTS nanocrystals and colloidal GQDs for photovoltaics emerged to achieve low cost, high perfor- mance photovoltaics, including organic solar cells,26 dye
Resonant metal-mesh bandpass filters for the far infrared
Massachusetts at Lowell, University of
- pass filter to suppress fundamental mixing by block- ing signal radiation near the local oscillator of solid copper films (typically 12-[im thick) perforated with arrays of cross-shaped apertures can be traced back to the research of Pelton and Munk,5 Agrawal and Imbriale,6 and Rhoads, et al7
ERDC/CHLTR-12-18 Dredged Material Placement Site Capacity
US Army Corps of Engineers
ERDC/CHLTR-12-18 Dredged Material Placement Site Capacity Analysis for Navigation Improvement. #12;ERDC/CHL TR-12-18 September 2012 Dredged Material Placement Site Capacity Analysis for Navigation of perfor- ming a dredged material placement (DMP) site capacity analysis for a Navigation Improvement
On the use of software quality metrics to im-prove physical properties of embedded systems
Wagner, Flávio Rech
, such as perfor- #12;2 mance, memory, energy, power, size, and weight, guided by design constraints. Other design strat- egy regarding low level, physical characteristics like performance, energy, and memory important and related metrics are reuse, time-to-market, and price. Although many methodologies extract
Appears in the proceedings of the Annual International Symposium on Computer Architecture (ISCA-31)
Wood, David A.
-Madison {alaa, david}@cs.wisc.edu Abstract Modern processors use two or more levels of cache memories to bridge Semiconductor technology trends and microarchitec- tural innovations continue to exacerbate the perfor- mance gap between processors and memory. The ITRS Roadmap [16]--the semiconductor industry's detailed
Satisfying Real-Time Constraints with Custom Instructions panyu@comp.nus.edu.sg
Mitra, Tulika
have become popular as they strike the right balance between challenging perfor- mance requirement to lists, requires prior specific permission and/or a fee. CODES+ISSS'05, Sept. 1921, 2005, Jersey City instructions help simple embedded processors achieve con- siderable performance and energy efficiency
Holtz, Mark
. INTRODUCTION Self-heating in optoelectronic and electronic devices is a substantial problem in situations miniaturization or in devices based on two- dimensional electron gases.13 Self-heating degrades perfor- mance to dissipate energy from the imme- diate self-heating region. Understanding of the intrinsic pho- non decay
Non-Linear Factor Model for Asset Selection using Multi Objective Genetic Programming
Fernandez, Thomas
and sensi- tivity to market movement. In [8], the interest rates, money growth, oil prices, and growth also vary in their perfor- mance expectations of the stock market portfolios they hold. In this work we yield (and little or no evidence for the book to market ratio). Categories and Subject Descriptors I.2.M
A Performance Counter Based Workload Characterization on Blue Gene/P
John, Lizy Kurian
A Performance Counter Based Workload Characterization on Blue Gene/P Karthik Ganesan Lizy John V--IBM's Blue Gene/P, the second generation of the Blue Gene supercomputer is designed with a Universal Perfor instrument applications and get a profound insight into its execution on the Blue Gene/P system which could
Manufacturing Thomas W. Eagar, Guest Editor
Eagar, Thomas W.
Materials Manufacturing Thomas W. Eagar, Guest Editor The bt·h.n-ior of succl'ssful manufac- tunn;imos., t·m·ironment for mate- nab manufacturing changes, so too does our ml·a~un· ol matt·rials performance~·(·vt·r. as shown by Figure 1, there are sen·ral additional dimensions to perfor- mann·. In particular, successful
Note: PMS 2725C Using, Storing and Preserving
of refrigerator at 41 °F or lower in perforated plastic bags. · Keep carrots away from raw meat and meat juices. Freezing Select young, tender, coreless, medium-length carrots. Remove tops, wash and peel. Leave small, drain and package, leaving 1/2 inch headspace. Seal and freeze. Water blanching: Use 1 gallon of water
Yener, Aylin
participants to recognize and correct conditions causing plant operational or upset problems. Electric Power fundamental background information on potential threats and relate it to the perfor- mance and latest design, this workshop presents a biological approach to the operation of wastewater treatment plants and teaches
Stevens, Ken
IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 11, NO. 1, FEBRUARY 2003 129 synthesis and veri- fication are demonstrated on three example circuits, facilitating transformations from perfor- mance, area, power, and functional testability of up to a factor of 3 in all three cases
Mazumder, Sudip K.
of RF communication- based wireless load-sharing control of a spatially distributed two- module parallel (DDCU), interna- tional space station (ISS), load sharing, network, power manage- ment and distribution inadequate dynamic perfor- mance, or active-current-sharing methods [3] that overcome the limitations
This is an author-deposited version published in: http://oatao.univ-toulouse.fr/ Eprints ID: 8855
Mailhes, Corinne
an aircraft composite fuselage structure manufactured by the Liquid Resin Infusion (LRI) process and subjected to a compressive load. LRI is based on the moulding of high perfor- mance composite parts by infusing liquid resin of a panel manufactured by a resin infusion process [8]. Numerical models consider the failure initiation any
Energy-Exposed Instruction Set Architectures Krste Asanovic
Asanovic, Krste
applications with complex control flow as we believe this type of code will become the energy bottleneckEnergy-Exposed Instruction Set Architectures Krste Asanovi´c MIT Laboratory for Computer Science alternate ways to perform the same task unless it will increase perfor- mance significantly. Implementations
Convective flow of refrigerant (R-123) across a bank of micro pin fins Ali Kosar, Yoav Peles *
Peles, Yoav
, and pressure drop of R-123 over a bank of shrouded micro pin fins 243 lm long with hydraulic diameter of 99 in diverse applications [1,5,12,14] to augment systems' thermal-hydraulic and chemical perfor- mance studied in the context of turbine blade cooling. Nusselt number and friction factor correlations
Hybrid simulation of Sensor and Actor Networks with BARAKA Thomas Halva Labella Isabel Dietrich
Breu, Ruth
modelling of co-operation issues in SANETs including the perfor- mance evaluation of either robot actions of research on Wireless Sensor Networks (WSNs) and mobile robotics. The result is an heterogeneous system in Wireless Sensor Network. Research issues include power management, routing, co-ordination algorithms
Plans for US Contributions to ITER U.S. ITER Plans for US Contributions to ITER
windings 75% cooling for divertor, vacuum vessel, ... 20% blanket/shield pellet injector tokamak exhaust supplies #12;Plans for US Contributions to ITER U.S. ITER Plans for US Contributions to ITER December 4 Exploring: - Seam-less tube conduit - Perforated central cooling tube #12;Plans for US Contributions to ITER
Document Assignment in Multi-site Search Engines Ulf Brefeld
Brefeld, Ulf
Document Assignment in Multi-site Search Engines Ulf Brefeld Yahoo! Research Barcelona, Spain to sites is critical for the perfor- mance of multi-site Web search engines. In such settings, sites crawl General Terms Design, Performance, Experimentation Keywords Multi-site web search engines, document
Saskatchewan, University of
Database Server Workload Characterization in an E-commerce Environment Fujian Liu Yanping Zhao, the database server perfor- mance is crucial. Dynamic cache is often used to reduce the load on the database server, which reduces the need for scalability. A good understanding of the workload charac- teristics
Gou, Perng-Fei (Saratoga, CA); Townsend, Harold E. (Campbell, CA); Barbanti, Giancarlo (Sirtori, IT)
1994-01-01T23:59:59.000Z
A corium protection assembly includes a perforated base grid disposed below a pressure vessel containing a nuclear reactor core and spaced vertically above a containment vessel floor to define a sump therebetween. A plurality of layers of protective blocks are disposed on the grid for protecting the containment vessel floor from the corium.
Evaluation of Viewport Size and Curvature of Large, High-Resolution Displays
Ball, Robert
of geospatial tasks that may be used in aerial imagery compari- son and analysis. One of the reasons for using in better user performance. We compared user perfor- mance time, accuracy, and mental workload on geospatial, viewport size, curvature, geospatial ACM Classification Keywords H.5.2 [User Interfaces] Ergonomics
Energy Impact of Secure Computation on a Handheld Device Zhiyuan Li
Li, Zhiyuan
Energy Impact of Secure Computation on a Handheld Device Zhiyuan Li Rong Xu Department of Computer is an important approach to save the energy consumption while improving perfor- mance for wireless networked security to the wireless network changes the relative cost of computation and commu- nication
Sensitivity of a Compressor Repeating-Stage to Geometry Jer^ome LAVAINNE
Peraire, Jaime
Sensitivity of a Compressor Repeating-Stage to Geometry Variation by J´er^ome LAVAINNE Dipl^ome d Students #12;2 #12;Sensitivity of a Compressor Repeating-Stage to Geometry Variation by J´er^ome LAVAINNE and probabilistic sensitivity analyses of an embedded compressor stage perfor- mance to blade geometric variations
Giles, C. Lee
A Hybrid Solid-State Storage Architecture for the Performance, Energy Consumption, and Lifetime-place updating so that it significantly im- proves the usage efficiency of log pages by eliminating out- of results show that our proposed methods can substantially improve the perfor- mance, energy consumption
Proceedings of ASME-FED 2006 2006 ASME Fluids Engineering Summer Conference
Smith, Barton L.
Proceedings of ASME-FED 2006 2006 ASME Fluids Engineering Summer Conference Miami, USA, July 17 of the INL model and to develop benchmark databases for CFD (Computational Fluid Dynamics) code assessment by ASME #12;through two perforated plates placed in line to suppress separa- tion and any pulsations
Journal of Power Sources 196 (2011) 55735582 Contents lists available at ScienceDirect
Mench, Matthew M.
2011-01-01T23:59:59.000Z
.C. Kumburb , M.M. Menchc, a Fuel Cell Diagnostics and Dynamics Laboratory, Department of Mechanical, Philadelphia, PA 19104, USA c Fuel Cell Diagnostics and Design Laboratory, Department of Mechanical, Aerospace of Power Sources journal homepage: www.elsevier.com/locate/jpowsour Laser perforated fuel cell diffusion
Pierce, Jim D. (Albuquerque, NM)
1994-01-01T23:59:59.000Z
A container for hazardous materials capable of protecting the enclosed materials from high speed impact. Energy absorption is provided by a multiplicity of crushable layers of either wire mesh or perforated metal sheets which thin and flow together under impact loading. Layers of a higher tensile strength material are interspersed within the crushable layers to confine them and increase performance.
Income tax problems of partnerships
Harrell, Clyde Wallace
1951-01-01T23:59:59.000Z
tester (s) did the partner invest csyitsl originating with hin, or (b) di4 he share in the jsxnsgxxsxnt or control of ths business? or (c) did he perfors vital additional servicesX Any xxxsber of s feaQg partnership who is to be reccgnised...
Whitcomb, Louis L.
Optimization and Comparative Analysis of a New HighÂPerformance Robot Arm via Finite Element Analysis Jaydeep Abstract This paper reports the structural design of a new highÂ performance robot arm. Design objectives a robot arm for high perforÂ mance tracking and force control applications. This paper reports a first
Adult hippocampal neurogenesis and its role in cognition
Oomen, Charlotte\tA.; Bekinschtein, Pedro; Kent, Brianne A.; Saksida, Lisa\tM.; Bussey, Timothy J.
2014-07-17T23:59:59.000Z
was shown to enhance retention of LTP in the DG for up to 2 weeks127. Others found that in vivo, reduced AHN through irradiation lowered responsiveness of perforant... suggested that AHN may contribute to these functions in some way. This idea was supported by the finding that memory demand correlated with AHN in birds9 and that in rats...
Pattern Recognition 40 (2007) 34303451 www.elsevier.com/locate/pr
Bandyopadhyay, Sanghamitra
2007-01-01T23:59:59.000Z
SBKM, its modified version, and the well-known K-means algorithm. Sixteen data sets with widely varying methods are the well-known K-means algorithm, single linkage and the minimal spanning tree (MST)-based algorithms, respectively [2Â6]. In order to improve the perfor- mance of the K-means algorithm, several
Devising Face Authentication System and Performance Evaluation Based on Statistical Models
University, msavvid@cs.cmu.edu Abstract The modern world has seen a rapid evolution of the technology the Army Research Office (ARO) to CyLab, CMU. #12;system called the Minimum Average Correlation Energy (MACE) filter in terms of perfor- mance on a database of 65 people under extreme illumination conditions
III. CONFINEMENT R. J. GOLDSTON (PPPL), R. E. WALTZ (GA) G. BATEMAN (PPPL), D. P. STOTLER (PPPL),
are not in a position to perform "first- principles" calculations of the projected perfor- mance of BPX. On the other Force and the Doublet III-D (DIII-D) and Toka- mak Fusion Test Reactor (TFTR) experimental teams, has, in order to develop techniques to optimize such plasmas for an Engineering Test Reactor, and in order
Simandl, Ronald F. (Farragut, TN); Brown, John D. (Harriman, TN); Whinnery, Jr., LeRoy L. (Dublin, CA)
1999-01-01T23:59:59.000Z
In an improved ozone decomposing air filter carbon fibers are held together with a carbonized binder in a perforated structure. The structure is made by combining rayon fibers with gelatin, forming the mixture in a mold, freeze-drying, and vacuum baking.