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Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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1

Perforated Patch Recording  

Science Journals Connector (OSTI)

Perforated patch recording is a special configuration in patch clamp recording that allows to measure whole?...

2006-01-01T23:59:59.000Z

2

Origami manifolds  

E-Print Network (OSTI)

An origami manifold is a manifold equipped with a closed 2-form which is symplectic everywhere except on a hypersurface, where it is a folded form whose kernel defines a circle fibration. In this thesis I explain how an ...

Pissarra Pires, Ana Rita

2010-01-01T23:59:59.000Z

3

Manifold Integration: Data Integration on Multiple Manifolds  

E-Print Network (OSTI)

In data analysis, data points are usually analyzed based on their relations to other points (e.g., distance or inner product). This kind of relation can be analyzed on the manifold of the data set. Manifold learning is an approach to understand...

Choi, Hee Youl

2011-08-08T23:59:59.000Z

4

High power laser perforating tools and systems  

DOE Patents (OSTI)

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.

Zediker, Mark S; Rinzler, Charles C; Faircloth, Brian O; Koblick, Yeshaya; Moxley, Joel F

2014-04-22T23:59:59.000Z

5

Oriented perforations -- A rock mechanics view  

SciTech Connect

Hydraulic fracture initiation dictates the communication path between the wellbore and fracture plane. Nonplanar fracture geometries such as multiple, T-Shaped, and reoriented fractures are not advantageous and they adversely affect the potential to achieve a desired stimulation treatment. Oriented perforations can be the solution to initiate a single wide fracture in vertical and deviated wells. Also oriented perforations may be used to create stable tunnels in poorly consolidated formations thus avoiding sand failure and consequently preventing sand production. This paper presents laboratory experimental results related to oriented perforations for hydraulic fracturing. It also discusses the use of oriented perforation for sand control. Experiments were designed to investigate the effect of perforation orientation in vertical and horizontal wells on hydraulic fracturing treatment.

Abass, H.H.; Meadows, D.L.; Brumley, J.L.; Hedayati, S.; Venditto, J.J.

1995-11-01T23:59:59.000Z

6

Edge compression manifold apparatus  

DOE Patents (OSTI)

A manifold for connecting external capillaries to the inlet and/or outlet ports of a microfluidic device for high pressure applications is provided. The fluid connector for coupling at least one fluid conduit to a corresponding port of a substrate that includes: (i) a manifold comprising one or more channels extending therethrough wherein each channel is at least partially threaded, (ii) one or more threaded ferrules each defining a bore extending therethrough with each ferrule supporting a fluid conduit wherein each ferrule is threaded into a channel of the manifold, (iii) a substrate having one or more ports on its upper surface wherein the substrate is positioned below the manifold so that the one or more ports is aligned with the one or more channels of the manifold, and (iv) device to apply an axial compressive force to the substrate to couple the one or more ports of the substrate to a corresponding proximal end of a fluid conduit.

Renzi, Ronald F. (Tracy, CA)

2007-02-27T23:59:59.000Z

7

Experimental Study on Heat Transfer of Single-Phase Flow and Boiling Two-Phase Flow in Vertical Narrow Annuli  

SciTech Connect

Water single-phase and nucleate boiling heat transfer were experimentally investigated in vertical annuli with narrow gaps. The experimental data about water single-phase flow and boiling two-phase flow heat transfer in narrow annular channel were accumulated by two test sections with the narrow gaps of 1.0 mm and 1.5 mm. Empirical correlations to predict the heat transfer of the single-phase flow and boiling two-phase flow in the narrow annular channel were obtained, which were arranged in the forms of the Dittus-Boelter for heat transfer coefficients in a single-phase flow and the Jens-Lottes formula for a boiling two-phase flow in normal tubes, respectively. The mechanism of the difference between the normal channel and narrow annular channel were also explored. From experimental results, it was found that the turbulent heat transfer coefficients in narrow gaps are nearly the same to the normal channel in the experimental range, and the transition Reynolds number from a laminar flow to a turbulent flow in narrow annuli was much lower than that in normal channel, whereas the boiling heat transfer in narrow annular gap was greatly enhanced compared with the normal channel. (authors)

Suizheng Qiu; Guanghui Su; Dounan Jia [Xi'an Jiaotong University, No.28, Xianning West Road, Xi'an, Shaanxi, 710049 (China); Minoru Takahashi [Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152 (Japan)

2002-07-01T23:59:59.000Z

8

Laser perforation of screen vacuum thermal insulation  

Science Journals Connector (OSTI)

This paper presents the results of the process of laser perforation of screen vacuum thermal insulation and shows that it has high efficiency. The use of various types of IR lasers...

Sysoev, V K; Vyatlev, P A; Zakharchenko, A V

2007-01-01T23:59:59.000Z

9

Manifold tool guide  

DOE Patents (OSTI)

A tool guide is described that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into the cross pipe for cleaning, inspection, etc. 3 figs.

Djordjevic, A.

1983-12-27T23:59:59.000Z

10

Manifold tool guide  

DOE Patents (OSTI)

A tool guide that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into to cross pipe for cleaning, inspection, etc.

Djordjevic, A.

1982-07-08T23:59:59.000Z

11

Manifold tool guide  

DOE Patents (OSTI)

A tool guide that makes possible the insertion of cleaning and/or inspection tools into a manifold pipe that will dislocate and extract the accumulated sediment in such manifold pipes. The tool guide basically comprises a right angled tube (or other angled tube as required) which can be inserted in a large tube and locked into a radially extending cross pipe by adjustable spacer rods and a spring-loaded cone, whereby appropriate cleaning tools can be inserted into to cross pipe for cleaning, inspection, etc.

Djordjevic, Aleksandar (Thousand Oaks, CA)

1983-12-27T23:59:59.000Z

12

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes.

Adkins, Douglas R. (Albuquerque, NM); Rawlinson, K. Scott (Albuquerque, NM)

1994-01-01T23:59:59.000Z

13

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

An improved evaporator section is described for a dual manifold heat pipe. Both the upper and lower manifolds can have surfaces exposed to the heat source which evaporate the working fluid. The tubes in the tube bank between the manifolds have openings in their lower extensions into the lower manifold to provide for the transport of evaporated working fluid from the lower manifold into the tubes and from there on into the upper manifold and on to the condenser portion of the heat pipe. A wick structure lining the inner walls of the evaporator tubes extends into both the upper and lower manifolds. At least some of the tubes also have overflow tubes contained within them to carry condensed working fluid from the upper manifold to pass to the lower without spilling down the inside walls of the tubes. 1 figure.

Adkins, D.R.; Rawlinson, K.S.

1994-01-04T23:59:59.000Z

14

Perforation of thin unreinforced concrete slabs  

SciTech Connect

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.

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

15

The instrumented dynamic perforation test applied to a composite shell  

E-Print Network (OSTI)

The instrumented dynamic perforation test applied to a composite shell S. Pattofatto, H. Tsitsiris Wilson, F-94230 Cachan, France Abstract. Perforation tests are commonly used on composites but give limited results. In this study, a single layer of a thermoplastic woven composite is tested at high

Paris-Sud XI, Université de

16

Shelling in low dimensional manifolds  

E-Print Network (OSTI)

1974) William Owen Murray IV, B. S. , Southwest Texas State University Chairman of Advisory Committee: Dr. L. B. Treybig The main objective of this thesis is to present some results concerning shelling of 3-cells contained in triangulated 3...-manifolds. These results will include some extensions of a theorem by Treybig which states that every compact 3-manifold has a triangulation in which every 3-cell, which is the union of 3-simplexes of the tri- angulation, can be shelled, Also, a...

Murray, William Owen

2012-06-07T23:59:59.000Z

17

Evaluation of Perforated Carbonate Cores Under Acid Stimulation  

E-Print Network (OSTI)

-moving jet of particles, which is able to pass through the gun body, casing, cement and formation in the same way as conventional charges. Then the liner materials deposited in the perforation tunnels react exothermically, generating heat and pressure... generates a secondary reaction immediately after deployment. This exothermic reaction is driven by the liner metallurgic properties, resulting in an increase of 11 temperature and pressure in the perforation tunnels. The increase in pressure causes...

Diaz, Nerwing Jose

2011-10-21T23:59:59.000Z

18

Subcritical Stein manifolds are split K. Cieliebak  

E-Print Network (OSTI)

Subcritical Stein manifolds are split K. Cieliebak April 30, 2002 1 Introduction This note concerns the following little observation. Theorem 1.1. Every subcritical Stein manifold (domain) is deformation equiv domains are compact, whereas Stein manifolds are noncompact. Subcritical. It is well

Cieliebak, Kai

19

Selectively fired, tubing-conveyed perforating guns save rig time  

SciTech Connect

Selective firing of tubing-conveyed perforating (TCP) guns during drill stem tests (DSTs) added flexibility and saved costs for Marathon Oil Co. As an example, in the Garland field in Wyoming, the guns allowed perforating multiple zones in one trip. This saved 1 1/2--2 days/well in rig time and $25,000--30,000/well in electric wire line and DST tool charges. For international offshore operations, savings of $200,000/well appear possible. Savings result not only from perforating multiple zones, but also from arbitrarily setting firing patterns with or without zone isolation. The paper describes the testing of equipment, the design of the guns, firing heads, crossover assembly, pressure isolation sub, control line, and select-fire sub, and applications for the guns.

Snider, P.M. (Marathon Oil Co., Houston, TX (United States)); Bond, P.L. (Halliburton Energy Services, Dallas, TX (United States))

1993-07-19T23:59:59.000Z

20

Characterization of cardiac lead perforation risk via a dynamic simulated environment  

E-Print Network (OSTI)

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 ...

Rosario, Matthew J

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Measuring aerosols generated inside armoured vehicles perforated by depleted uranium ammunition  

Science Journals Connector (OSTI)

......armoured vehicles perforated by depleted uranium ammunition M. A. Parkhurst...significance of exposure to depleted uranium (DU), the US Department of...armoured vehicles perforated by depleted uranium ammunition. | In response to......

M. A. Parkhurst

2003-07-01T23:59:59.000Z

22

Tubing pressurized firing apparatus for a tubing conveyed perforating gun  

SciTech Connect

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.

Davies, D. L.

1985-11-26T23:59:59.000Z

23

Construction of Conformally Compact Einstein Manifolds  

E-Print Network (OSTI)

We produce some explicit examples of conformally compact Einstein manifolds, whose conformal compactifications are foliated by Riemannian products of a closed Einstein manifold with the total space of a principal circle bundle over products of Kahler-Einstein manifolds. We compute the associated conformal invariants, i.e., the renormalized volume in even dimensions and the conformal anomaly in odd dimensions. As a by-product, we obtain some Riemannian products with vanishing Q-curvature.

Dezhong Chen

2009-08-11T23:59:59.000Z

24

Manifold seal for fuel cell stack assembly  

DOE Patents (OSTI)

An assembly for sealing a manifold to a stack of fuel cells includes a first resilient member for providing a first sealing barrier between the manifold and the stack. A second resilient member provides a second sealing barrier between the manifold and the stack. The first and second resilient members are retained in such a manner as to define an area therebetween adapted for retaining a sealing composition.

Schmitten, Phillip F. (N. Huntingdon, PA); Wright, Maynard K. (Bethel Park, PA)

1989-01-01T23:59:59.000Z

25

Hamilton Dynamics on Clifford Kaehler Manifolds  

E-Print Network (OSTI)

This paper presents Hamilton dynamics on Clifford Kaeler manifolds. In the end, the some results related to Clifford Kaehler dynamical systems are also discussed.

Mehmet Tekkoyun

2009-02-24T23:59:59.000Z

26

GEODESIC INTERSECTIONS IN ARITHMETIC HYPERBOLIC 3-MANIFOLDS  

E-Print Network (OSTI)

GEODESIC INTERSECTIONS IN ARITHMETIC HYPERBOLIC 3-MANIFOLDS Kerry N. Jones Alan W. Reid Abstract. It was shown by Chinburg and Reid that there exist closed hyperbolic 3-manifolds in which all closed geodesics closed geodesics simple and disjoint. The natural conjecture arose that the Chinburg-Reid examples also

Jones, Kerry N.

27

Optimal Transportation on Sub-Riemannian Manifolds  

E-Print Network (OSTI)

Optimal Transportation on Sub-Riemannian Manifolds Ludovic Rifford Universit´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

Rifford, Ludovic

28

Optimal Transportation on Sub-Riemannian Manifolds  

E-Print Network (OSTI)

Optimal Transportation on Sub-Riemannian Manifolds Ludovic Rifford Universit´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

Rifford, Ludovic

29

Obstructions to Pin Structures on Kleinian Manifolds  

E-Print Network (OSTI)

We develop various topological notions on four-manifolds of Kleinian signature $(- - + +)$. In particular, we extend the concept of `Kleinian metric homotopy' to non-orientable manifolds. We then derive the topological obstructions to pin-Klein cobordism, for all of the pin groups. Finally, we discuss various examples and applications which arise from this work.

L. J. Alty; A. Chamblin

1995-05-03T23:59:59.000Z

30

Magnetic Resonance Imaging (MRI) of PEM Dehydration and Gas Manifold...  

NLE Websites -- All DOE Office Websites (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...

31

Application of High Powered Lasers to Perforated Completions  

NLE Websites -- All DOE Office Websites (Extended Search)

Congress on Applications of Laser & Electro-Optics Congress on Applications of Laser & Electro-Optics October 13 - 16, 2003, Jacksonville, Florida Application of High Powered Lasers to Perforated Completions Zhiyue Xu, Claude B. Reed and Keng H. Leong Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL 60439 R. A. Parker Parker Geoscience Consulting, LLC, 6346 Secrest Street, Arvada, CO 80403 R. M. Graves, Petroleum Engineering Department, Colorado School of Mines, Golden, CO 80401 ABSTRACT As part of the process of drilling an oil or gas well, a steel production casing is often inserted to the bottom of the well and sealed with cement against the productive formation. Openings must be made through the steel casing wall and cement and into the rock formation to allow formation fluid to enter the well. Conventionally, a perforator is

32

Perforated plates for cryogenic regenerators and method of fabrication  

DOE Patents (OSTI)

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.

Hendricks, John B. (Huntsville, AL)

1994-01-01T23:59:59.000Z

33

Perforated plates for cryogenic regenerators and method of fabrication  

DOE Patents (OSTI)

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.

Hendricks, J.B.

1994-03-29T23:59:59.000Z

34

Inflow performance relationship for perforated wells producing from solution gas drive reservoir  

SciTech Connect

The IPR curve equations, which are available today, are developed for open hole wells. In the application of Nodal System Analysis in perforated wells, an accurate calculation of pressure loss in the perforation is very important. Nowadays, the equation which is widely used is Blount, Jones and Glaze equation, to estimate pressure loss across perforation. This equation is derived for single phase flow, either oil or gas, therefore it is not suitable for two-phase production wells. In this paper, an IPR curve equation for perforated wells, producing from solution gas drive reservoir, is introduced. The equation has been developed using two phase single well simulator combine to two phase flow in perforation equation, derived by Perez and Kelkar. A wide range of reservoir rock and fluid properties and perforation geometry are used to develop the equation statistically.

Sukarno, P. [Inst. Teknologi Bandung (Indonesia); Tobing, E.L.

1995-10-01T23:59:59.000Z

35

E-Print Network 3.0 - acquired perforating dermatosis Sample...  

NLE Websites -- All DOE Office Websites (Extended Search)

Biology and Medicine ; Environmental Sciences and Ecology 8 Managing Performance vs. Accuracy Trade-offs With Loop Perforation Summary: Managing Performance vs. Accuracy...

36

E-Print Network 3.0 - acute gallbladder perforation Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

semantic searches, or searches based on concepts... in which the order of the search terms does not matter. For example, a search for "perforated gallbladder... " will match...

37

E-Print Network 3.0 - armoured vehicles perforated Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Powered by Explorit Topic List Advanced Search Sample search results for: armoured vehicles perforated Page: << < 1 2 3 4 5 > >> 1 Super Bainite (High Hardness) Steel Super...

38

Project Development Specification for Valve Pit Manifold  

SciTech Connect

Establishes the performance, design development, and test requirements for the valve pit manifolds. The system engineering approach was used to develop this document in accordance with the guidelines laid out in the Systems Engineering Management Plan for Project W-314.

MCGREW, D.L.

2000-09-28T23:59:59.000Z

39

How perforation shot density affects gas well performance  

SciTech Connect

The single gas well model is formulated using the systems analysis approach and is composed of three main modules. The first module is the modified inflow performance relationship (IPR). This IPR accounts for pressure drops through the reservoir, laminar skin and damaged, compacted zone around casing perforations. The second module is the tubing outflow performance computed via the Cullender and Smith method. The third module is the gas material balance equation for computing average well pressure with a given gas production level. By coupling this equation with the computed inflow and outflow results, future gas deliverability and economic return of a gas well can then be projected.

Cheng, A.M.C.

1988-03-01T23:59:59.000Z

40

Mechanical seal having a single-piece, perforated mating ring  

DOE Patents (OSTI)

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.

Khonsari, Michael M. (Baton Rouge, LA); Somanchi, Anoop K. (Fremont, CA)

2007-08-07T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Low temperature thermal transport in partially perforated silicon nitride membranes.  

SciTech Connect

The thermal transport in partially trenched silicon nitride membranes has been studied in the temperature range from 0.3 to 0.6 K, with the transition edge sensor (TES), the sole source of membrane heating. The test configuration consisted of Mo/Au TESs lithographically defined on silicon nitride membranes 1 {micro}m thick and 6 mm{sup 2} in size. Trenches with variable depth were incorporated between the TES and the silicon frame in order to manage the thermal transport. It was shown that sharp features in the membrane surface, such as trenches, significantly impede the modes of phonon transport. A nonlinear dependence of thermal resistance on trench depth was observed. Partial perforation of silicon nitride membranes to control thermal transport could be useful in fabricating mechanically robust detector devices.

Yefremenko, V.; Wang, G.; Novosad, V.; Datesman, A.; Pearson, J.; Divan, R.; Chang, C. L.; Downes, T. P.; Mcmahon, J. J.; Bleem, L. E.; Crites, A. T.; Meyer, S. S.; Carlstrom, J. E.; Univ. of Chicago

2009-05-04T23:59:59.000Z

42

Betti numbers of a class of barely G2 manifolds  

E-Print Network (OSTI)

We calculate explicitly the Betti numbers of a class of barely G2 manifolds - that is, G2 manifolds that are realised as a product of a Calabi-Yau manifold and a circle, modulo an involution. The particular class which we consider are those spaces where the Calabi-Yau manifolds are complete intersections of hypersurfaces in products of complex projective spaces and the involutions are free acting.

Sergey Grigorian

2009-09-25T23:59:59.000Z

43

SYMPLECTIC TOPOLOGY ON SUBCRITICAL MANIFOLDS PAUL BIRAN AND KAI CIELIEBAK  

E-Print Network (OSTI)

SYMPLECTIC TOPOLOGY ON SUBCRITICAL MANIFOLDS PAUL BIRAN AND KAI CIELIEBAK 1. Introduction The study of the symplectic topology of Stein manifolds leads naturally to two distinct subclasses: subcritical and critical. A Stein manifold is called subcritical if it admits a plurisubharmonic function which has only critical

Cieliebak, Kai

44

Connections on statistical manifolds of density operators by geometry of  

E-Print Network (OSTI)

of statistical manifolds, that is of manifolds whose points can be identified with density functions with respect to a certain measure µ. The classical references for the theory can be found in the books [1, 2, 4Connections on statistical manifolds of density operators by geometry of noncommutative Lp -spaces

Isola, Tommaso

45

Reflection of Waterborne acoustic waves from a viscoelastic layer on a rigid hacking with perforations  

Science Journals Connector (OSTI)

The reflection coefficient is calculated for a plane acoustic wave normally incident on a viscoelasticrubber cover layer submerged in water. The rubber layer is mounted on a rigid backing with air?filled cylindrical perforations. Acoustical losses are attributed to motion of the layer over the perforations. This motion is calculated by treating the layer above each perforation as a vibrating circular viscoelastic plate. Different boundary conditions are assumed and in each case the soundreflection coefficient is calculated. The results are compared with the experimental data of R. Lane [Ultrason. 19 2830 (1981)].

J. Jarzynski

1982-01-01T23:59:59.000Z

46

Measuring aerosols generated inside armoured vehicles perforated by depleted uranium ammunition  

Science Journals Connector (OSTI)

......War about the health significance of exposure to depleted uranium (DU), the...perforated by depleted uranium ammunition...War about the health significance of exposure to depleted uranium (DU), the......

M. A. Parkhurst

2003-07-01T23:59:59.000Z

47

A study of the effects of casing perforations on the production rates of wells  

E-Print Network (OSTI)

, Analogy Between Electrical and Pluid Syntone. . . . . 14 2A Diagran of Electrolytic Tash , 2B Diagrsn of Cased Role 2C Radial Distribution of Perforations ~ ~ 15 16 2D Vertical Distribution of Perforations . . . ~ The Effect of Well Sore Resistance... on tha Relative Productivity of a Well Using the Electric Analog Nodal ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ '16 The Ratio of Non-Steady State Plow ro Steady Stats Plow Versus Relative Depletion Tine for Various Well Bore Resistances...

Sanderlin, James Lewis

2012-06-07T23:59:59.000Z

48

Energy-momentum balance in particle - domain wall perforating collision  

E-Print Network (OSTI)

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 de...

Gal'tsov, D V; Spiirin, P A

2014-01-01T23:59:59.000Z

49

Energy-momentum balance in particle - domain wall perforating collision  

E-Print Network (OSTI)

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.

D. V. Gal'tsov; E. Yu. Melkumova; P. A. Spiirin

2014-11-01T23:59:59.000Z

50

Port-Hamiltonian systems on discrete manifolds  

E-Print Network (OSTI)

This paper offers a geometric framework for modeling port-Hamiltonian systems on discrete manifolds. The simplicial Dirac structure, capturing the topological laws of the system, is defined in terms of primal and dual cochains related by the coboundary operators. This finite-dimensional Dirac structure, as discrete analogue of the canonical Stokes-Dirac structure, allows for the formulation of finite-dimensional port-Hamiltonian systems that emulate the behaviour of the open distributed-parameter systems with Hamiltonian dynamics.

Marko Seslija; Jacquelien M. A. Scherpen; Arjan van der Schaft

2012-01-27T23:59:59.000Z

51

THE GEOMETRIES OF 3-MANIFOLDS PETER SCOTT  

E-Print Network (OSTI)

that each smooth path on S2 has a length, namely its length as a path in £3 . (I shall consistently use ETHE GEOMETRIES OF 3-MANIFOLDS PETER SCOTT Page §1. The 2-dimensional geometries 405 §2. Geometric. The eight 3-dimensional geometries 441 E3 443 H3 448 S3 449 S2 x U 457 fPxM 459 SL2U 462 Nil 467 Sol 470 §5

Schleimer, Saul

52

Simultaneous Learning of Nonlinear Manifolds Based on the Bottleneck Neural Network  

Science Journals Connector (OSTI)

Manifold learning methods are important techniques for nonlinear extraction of high-dimensional data structures. These methods usually extract a global manifold for data. However, in many real-world problems, there is not only one global manifold, but ... Keywords: Deep structure, Manifold learning, Manifold separation, Multitask learning, Neural network, Virtual pattern

Seyyede Zohreh Seyyedsalehi, Seyyed Ali Seyyedsalehi

2014-10-01T23:59:59.000Z

53

How to project `circular' manifolds using geodesic distances?  

E-Print Network (OSTI)

How to project `circular' manifolds using geodesic distances? John Aldo Lee, Michel Verleysen,verleysen}@dice.ucl.ac.be Abstract. Recent papers have clearly shown the advantage of using the geodesic distance instead strongly crumpled manifolds have to be un- folded. Nevertheless, neither the Euclidean nor the geodesic

Verleysen, Michel

54

Geodesic Regression on Riemannian Manifolds P. Thomas Fletcher  

E-Print Network (OSTI)

Geodesic Regression on Riemannian Manifolds P. Thomas Fletcher School of Computing, University a manifold-valued random variable and a real-valued independent parameter. The principle is to fit a geodesic is evaluated as the sum-of-squared geodesic distances from the model to the data, and this provides

Boyer, Edmond

55

Geometric integration: numerical solution of differential equations on manifolds  

Science Journals Connector (OSTI)

...such as rigid bodies and the Solar System. Conserved quantities...long-term integration of the solar system by Wisdom & Holman...investigate the stability of the solar system, it was essential to...manifold invariant is greatly assisted when M is a homogeneous manifold...

1999-01-01T23:59:59.000Z

56

Heat Kernel for Open Manifolds Trevor H. Jones  

E-Print Network (OSTI)

Heat Kernel for Open Manifolds Trevor H. Jones 22nd July, 2010 Abstract It is known that for open manifolds with bounded geometry, the differential form heat kernel exists and is unique. Furthermore, it has been shown that the components of the differential form heat kernel are related via the exterior

Jones, Trevor H.

57

GRASSMANN MANIFOLDS OF JORDAN ALGEBRAS Abstract. We show that, in a JB-algebra, the projections form a Banach manifold  

E-Print Network (OSTI)

GRASSMANN MANIFOLDS OF JORDAN ALGEBRAS Cho-Ho Chu Abstract. We show that, in a JB symmetric space of compact type, for n N {0}. 1. Introduction The close connection between Jordan algebras is to address these issues, and indeed, we study manifolds of projections in JB-algebras using only real Jordan

58

Smith theory and irreducible holomorphic symplectic manifolds  

E-Print Network (OSTI)

We study the cohomological properties of the fixed locus $X^G$ of an automorphism group $G$ of prime order $p$ acting on a variety $X$ whose integral cohomology is torsion-free. We obtain an precise relation between the mod $p$ cohomology of $X^G$ and natural invariants for the action of $G$ on the integral cohomology of $X$. We apply these results to irreducible holomorphic symplectic manifolds of deformation type of the Hilbert scheme of two points on a K3 surface: the main result of this paper is a formula relating the dimension of the mod $p$ cohomology of $X^G$ with the rank and the discriminant of the invariant lattice in the second cohomology space with integer coefficients of $X$.

Boissiere, Samuel; Sarti, Alessandra

2012-01-01T23:59:59.000Z

59

Well-productivity improvement by use of rapid overpressured perforation extension: Case history  

SciTech Connect

This paper describes an overbalance perforating and surging technique used as a pretreatment to hydraulic fracturing of the Romeo interval at Prudhoe Bay. Operation conditions, surface and bottomhole pressure (BHP) measurements, and modeling results are presented and discussed. Well productivity and the amount of proppant placed are compared with results in offset wells where the technique was not used.

Coueet, B.; Petitjean, L.M. [Schlumberger-Doll Research, Ridgefield, CT (United States); Abel, J.C.; Schmidt, J.H.; Ferguson, K.R.

1996-02-01T23:59:59.000Z

60

Heat transfer and thermodynamic performance of a parabolic trough receiver with centrally placed perforated plate inserts  

Science Journals Connector (OSTI)

Abstract In this paper, a numerical investigation of thermal and thermodynamic performance of a receiver for a parabolic trough solar collector with perforated plate inserts is presented. The analysis was carried out for different perforated plate geometrical parameters including dimensionless plate orientation angle, the dimensionless plate spacing, and the dimensionless plate diameter. The Reynolds number varies in the range 1.02נ104?Re?7.38נ105 depending on the heat transfer fluid temperature. The fluid temperatures used are 400K, 500K, 600K and 650K. The porosity of the plate was fixed at 0.65. The study shows that, for a given value of insert orientation, insert spacing and insert size, there is a range of Reynolds numbers for which the thermal performance of the receiver improves with the use of perforated plate inserts. In this range, the modified thermal efficiency increases between 1.2% and 8%. The thermodynamic performance of the receiver due to inclusion of perforated plate inserts is shown to improve for flow rates lower than 0.01205m3/s. Receiver temperature gradients are shown to reduce with the use of inserts. Correlations for Nusselt number and friction factor were also derived and presented.

Aggrey Mwesigye; Tunde Bello-Ochende; Josua P. Meyer

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Eulerian simulation of the perforation of aluminum plates by nondeforming projectiles  

SciTech Connect

A new algorithm for the treatment of sliding interfaces between solids with or without friction in an Eulerian wavecode is described. The algorithm has been implemented in the two-dimensional version of the CTH code. The code was used to simulate penetration and perforation of aluminum plates by rigid, conical-nosed tungsten projectiles. Comparison with experimental data is provided.

Silling, S.A.

1992-03-01T23:59:59.000Z

62

Fixed points, stable manifolds, weather regimes, and their predictability  

In a simple, one-layer atmospheric model, we study the links between low-frequency variability and the models 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.

Deremble, Bruno; D'Andrea, Fabio; Ghil, Michael [Univ. of California, Los Angeles, CA (United Staes). Atmospheric and Oceanic Sciences and Institute of Geophysics and Planetary Physics

2009-10-27T23:59:59.000Z

63

Modified Curvatures on Manifolds with Boundary and Applications  

Science Journals Connector (OSTI)

To study the reflecting diffusion processes on manifolds with boundary, some new curvature operators are introduced by using the Bakry-Emery curvature and the second fundamental form. As applications, the grad...

Feng-Yu Wang

2014-10-01T23:59:59.000Z

64

The Slow Manifold of a Five-Mode Model  

Science Journals Connector (OSTI)

The slow manifold of an inviscid five-mode model introduced by Lorenz is investigated. When the influence of the gravity modes on the Rossby modes is neglected, the analytical solution given by Lorenz and Krishnamurthy is generalized. When ...

John P. Boyd

1994-04-01T23:59:59.000Z

65

On the ultraviolet behaviour of quantum fields over noncommutative manifolds  

E-Print Network (OSTI)

By exploiting the relation between Fredholm modules and the Segal-Shale-Stinespring version of canonical quantization, and taking as starting point the first-quantized fields described by Connes' axioms for noncommutative spin geometries, a Hamiltonian framework for fermion quantum fields over noncommutative manifolds is introduced. We analyze the ultraviolet behaviour of second-quantized fields over noncommutative 3-tori, and discuss what behaviour should be expected on other noncommutative spin manifolds.

Varilly, J C; Varilly, Joseph C.; Gracia-Bondia, Jose M.

1999-01-01T23:59:59.000Z

66

Renormalization, unstable manifolds, and the fractal structure of mode locking  

SciTech Connect

The apparent universality of the fractal dimension of the set of quasiperiodic windings at the onset of chaos in a wide class of circle maps is described by construction of a universal one-parameter family of maps which lies along the unstable manifold of the renormalization group. The manifold generates a universal ''devil's staircase'' whose dimension agrees with direct numerical calculations. Applications to experiments are discussed.

Cvitanovic, P.; Jensen, M.H.; Kadanoff, L.P.; Procaccia, I.

1985-07-22T23:59:59.000Z

67

The presence of perforated synapses in the striatum after dopamine depletion, is this a sign of maladaptive brain plasticity?  

Science Journals Connector (OSTI)

......depletion, is this a sign of maladaptive brain plasticity? Veronica Anaya-Martinez...number of perforated synapses, suggesting brain plasticity that might be deleterious for...both during development and in the mature brain, is thus based upon the strengthening......

Vernica Anaya-Martnez; Ana Luisa Gutierrez-Valdez; Jose Luis Ordoez-Librado; Enrique Montiel-Flores; Javier Snchez-Betancourt; Csar Snchez Vzquez del Mercado; Leonardo Reynoso-Erazo; Roco Tron-Alvarez; Maria Rosa Avila-Costa

2014-12-01T23:59:59.000Z

68

An elastic-perfectly plastic flow model for finite element analysis of perforated materials  

SciTech Connect

This paper describes the formulation of an elastic-perfectly plastic flow theory applicable to equivalent solid [EQS] modeling of perforated materials. An equilateral triangular array of circular penetrations is considered. The usual assumptions regarding geometry and loading conditions applicable to the development of elastic constants for EQS modeling of perforated plates are considered to apply here. An elastic-perfectly plastic [EPP] EQS model is developed for a collapse surface that includes fourth-order stress terms. The fourth order yield function has been shown to be appropriate for plates with a triangular array of circular holes. A complete flow model is formulated using the consistent tangent modulus approach based on the fourth order yield function.

Jones, D.P.; Gordon, J.L.; Hutula, D.N.; Banas, D.; Newman, J.B.

1999-02-01T23:59:59.000Z

69

Tympanic-Membrane Perforation as a Marker of Concussive Brain Injury in Iraq  

Science Journals Connector (OSTI)

...principally in the form of roadside improvised explosive devices (IEDs), continues to be the signature mechanism of injury for coalition forces in Iraq. In 2005, the U.S. military reported 10,953 IED attacks, at an average of 30 per day. Combat body armor provides soldiers with considerable protection... This study evaluated 210 U.S. soldiers after blast injury in Iraq. There was a significant association between tympanic-membrane perforation and concussive brain injury.

2007-08-23T23:59:59.000Z

70

Closed manifolds with transcendental L2-Betti numbers.  

E-Print Network (OSTI)

In this paper, we show how to construct examples of closed manifolds with explicitly computed irrational, even transcendental L2 Betti numbers, defined via the universal covering. We show that every non-negative real number shows up as an L2-Betti number of some covering of a compact manifold, and that many computable real numbers appear as an L2-Betti number of a universal covering of a compact manifold (with a precise meaning of computable given below). In algebraic terms, for many given computable real numbers (in particular for many transcendental numbers) we show how to construct a finitely presented group and an element in the integral group ring such that the L2-dimension of the kernel is the given number. We follow the method pioneered by Austin in "Rational group ring elements with kernels having irrational dimension" arXiv:0909.2360) but refine it to get very explicit calculations which make the above statements possible.

Mikal Pichot (University of Tokyo (IPMU)); Thomas Schick (Georg-August-Universitt Gttingen); Andrzej Zuk (Paris 7)

71

The Conjugate Linearized Ricci Flow on Closed 3-Manifolds  

E-Print Network (OSTI)

We characterize the conjugate linearized Ricci flow and the associated backward heat kernel on closed three--manifolds of bounded geometry. We discuss their properties, and introduce the notion of Ricci flow conjugated constraint sets which characterizes a way of Ricci flow averaging metric dependent geometrical data. We also provide an integral representation of the Ricci flow metric itself and of its Ricci tensor in terms of the heat kernel of the conjugate linearized Ricci flow. These results, which readily extend to closed n-dimensional manifolds, yield for various conservation laws, monotonicity and asymptotic formulas for the Ricci flow and its linearization.

Mauro Carfora

2007-10-17T23:59:59.000Z

72

A Family of Discriminative Manifold Learning Algorithms and Their Application to Speech Recognition  

Science Journals Connector (OSTI)

This paper presents a family of discriminative manifold learning approaches to feature space dimensionality reduction in noise robust automatic speech recognition (ASR). The specific goal of these techniques is to preserve local manifold structure in ...

Vikrant Singh Tomar; Richard C. Rose

2014-01-01T23:59:59.000Z

73

Intrinsic Mean Shift for Clustering on Stiefel and Grassmann Manifolds Hasan Ertan C etingul Rene Vidal  

E-Print Network (OSTI)

Intrinsic Mean Shift for Clustering on Stiefel and Grassmann Manifolds Hasan Ertan C¸ eting¨ul Ren

74

Performance characteristics of a perforated shadow band under clear sky conditions  

SciTech Connect

A perforated, non-rotating shadow band is described for separating global solar irradiance into its diffuse and direct normal components using a single pyranometer. Whereas shadow bands are normally solid so as to occult the sensor of a pyranometer throughout the day, the proposed band has apertures cut from its circumference to intermittently expose the instrument sensor at preset intervals. Under clear sky conditions the device produces a saw tooth waveform of irradiance data from which it is possible to reconstruct separate global and diffuse curves. The direct normal irradiance may then be calculated giving a complete breakdown of the irradiance curves without need of a second instrument or rotating shadow band. This paper describes the principle of operation of the band and gives a mathematical model of its shading mask based on the results of an optical ray tracing study. An algorithm for processing the data from the perforated band system is described and evaluated. In an extended trial conducted at NREL's Solar Radiation Research Laboratory, the band coupled with a thermally corrected Eppley PSP produced independent curves for diffuse, global and direct normal irradiance with low mean bias errors of 5.6 W/m{sup 2}, 0.3 W/m{sup 2} and -2.6 W/m{sup 2} respectively, relative to collocated reference instruments. Random uncertainties were 9.7 W/m{sup 2} (diffuse), 17.3 W/m{sup 2} (global) and 19.0 W/m{sup 2} (direct). When the data processing algorithm was modified to include the ray trace model of sensor exposure, uncertainties increased only marginally, confirming the effectiveness of the model. Deployment of the perforated band system can potentially increase the accuracy of data from ground stations in predominantly sunny areas where instrumentation is limited to a single pyranometer. (author)

Brooks, Michael J. [School of Mechanical Engineering, University of KwaZulu-Natal, Durban (South Africa)

2010-12-15T23:59:59.000Z

75

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces  

E-Print Network (OSTI)

The Complexity of Geodesic Voronoi Diagrams on Triangulated 2-Manifold Surfaces Yong-Jin Liu1 , Kai 2-manifold surface, based on the geodesic metric. Given a triangulated 2-manifold T of n faces T, the Voronoi diagram of a set of point sites based on the geodesic metric (called below geodesic

Tang, Kai

76

A MANIFOLD THAT DOES NOT CONTAIN A COMPACT CORE Gerard A. Venema  

E-Print Network (OSTI)

A MANIFOLD THAT DOES NOT CONTAIN A COMPACT CORE Gerard A. Venema June 2, 1997 A b s t r ac t . A core of a (noncompact) manifold is a submanifold with the property that the inclusion to contain a compact core even though the manifold has the homotopy type of a finite complex. 1. Introduction

Venema, Gerard

77

VOLUMES OF HYPERBOLIC 3MANIFOLDS OF BETTI NUMBER AT LEAST 3  

E-Print Network (OSTI)

VOLUMES OF HYPERBOLIC 3­MANIFOLDS OF BETTI NUMBER AT LEAST 3 ANDREW PRZEWORSKI Abstract. We provide a new, simpler proof of the fact that the smallest volume hyperbolic 3­manifold has betti number­manifold has betti number at least 3, then its volume is at least 0.94689 and hence it is not the smallest

Przeworski, Andrew

78

White noise analysis on manifolds and the energy representation of a gauge group  

E-Print Network (OSTI)

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.

Takahiro Hasebe

2011-01-15T23:59:59.000Z

79

Generic measures for geodesic flows on nonpositively curved manifolds  

E-Print Network (OSTI)

Generic measures for geodesic flows on nonpositively curved manifolds Yves Coud`ene, Barbara the generic invariant probability measures for the geodesic flow on connected complete nonpositively curved subset of the set of all probability measures invariant by the geodesic flow. The proof of K. Sigmund

Paris-Sud XI, Université de

80

INTEGRABILITY OF GEODESIC FLOWS AND ISOSPECTRALITY OF RIEMANNIAN MANIFOLDS  

E-Print Network (OSTI)

INTEGRABILITY OF GEODESIC FLOWS AND ISOSPECTRALITY OF RIEMANNIAN MANIFOLDS DOROTHEE SCHUETH are isospectral for the Laplace operator on functions and such that M has completely integrable geodesic flow of the submanifolds of the unit tangent bundle given by two maximal continuous families of closed geodesics

Schüth, Dorothee

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

TOPOLOGICAL PROPERTIES OF ESCHENBURG SPACES AND 3-SASAKIAN MANIFOLDS  

E-Print Network (OSTI)

, AND WOLFGANG ZILLER Riemannian manifolds with positive sectional curvature have been a frequent topic of global by (a, b, c) = (2279, 1603, 384) and (2528, 939, 799) with r = 5143925. The two 3-Sasakian metrics sectional curvature, although the 3-Sasakian metric never has positive curvature. They are special cases

Ziller, Wolfgang

82

Manifold Identification in Dual Averaging for Regularized Stochastic ...  

E-Print Network (OSTI)

dimensional manifold of parameter space along which the regularizer is smooth. (When an ?1 ...... Proof To measure the cardinality of the complement of St, that is, Sc t := {1,2,...,t}\\St, ..... the median (rather than the mean) and the standard deviation. The table also ...... Statistics and its Interface, 1:137153, 2008. I. Vaisman.

2012-06-01T23:59:59.000Z

83

Data assimilation on the exponentially accurate slow manifold  

Science Journals Connector (OSTI)

...Michael K. Davey and John M. Huthnance Data assimilation on the exponentially accurate...climate system . I describe an approach to data assimilation making use of an explicit...conditions near the slow manifold, allowing data assimilation to be performed without introducing...

2013-01-01T23:59:59.000Z

84

Heat kernel on connected sums of Riemannian manifolds  

E-Print Network (OSTI)

Heat kernel on connected sums of Riemannian manifolds@math.cornell.edu May 1999 1 Introduction This note is about the heat kernel on a connected sum M of non-compact man- ifolds M1, M2, ..., Mk assuming that one knows enough about the heat kernels for each Mi

Grigor'yan, Alexander

85

First laboratory perforating tests in coal show lower-than-expected penetration  

SciTech Connect

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.

Snider, P.M.; Walton, I.C.; Skinner, T.K.; Atwood, D.C.; Grove, B.M.; Graham, C.

2008-06-15T23:59:59.000Z

86

Well productivity improvement using extreme overbalanced perforating and surging-case history  

SciTech Connect

This paper describes overbalanced perforating and surging operations as a pretreatment to hydraulic fracturing for the Romeo interval at Prudhoe Bay. Operation conditions are presented and discussed, as well as surface and bottomhole pressure measurements. Well productivity and the amount of proppant placed are compared to results in offset wells where the technique was not applied. The paper shows how the use of the technique allows placement of small, highly conductive fractures in intervals that were not previously considered fracturing candidates due to the close proximity to the gas/oil contact (GOC). The paper also shows pressure transient analysis affirming the technique as a stand-alone stimulation. It is shown that the use of extreme overbalanced perforating and surging treatments prior to hydraulic fracturing produces a substantial increase both in the success rate and the efficiency of the hydraulic fracturing operation and in the production rate of the wells that are pretreated. Finally, a comparison between pressure data and a new radial fracture propagation model shows a good match. The model demonstrates that high-energy treatment can significantly increase the extension and the height of the fracture; this was corroborated by downhole pressure measurements recorded during one overbalance treatment and by well logs.

Petitjean, L.; Coueet, B.; Abel, J.C. [and others

1995-12-31T23:59:59.000Z

87

Design of compact micro-perforated membrane absorbers for polycarbonate pane in automobile  

Science Journals Connector (OSTI)

Polycarbonate (PC) laminate is gradually substituted for the glass as window pane in automobile. Absorption performance of PC pane is poor using resin membrane between two folders of pane because of the low acoustic impedance of membrane. Micro-perforated absorbers can provide high absorption coefficients. However, the depths of air cavity were all over the 50mm in past studies. In this paper, a compact and efficient micro-perforated membrane (MPM) absorber is designed as a combination of baffle-resonator and Helmholtz-resonator with sub-millimeter holes backed by an air space. Absorption coefficients of MPM absorbers are predicted by equivalent electric-acoustic circuit analysis method. This paper presents three different MPM materials of polypropylene, polyethylene, and carbon polyester respectively. The numerical results shows that absorption performance of PC pane can be improved using double layer MPM absorber and the whole thickness of MPM absorber is not exceed 10mm to meet the structural requirement of PC pane application in automobile.

Shen Min; Kazuteru Nagamura; Noritoshi Nakagawa; Masaharu Okamura

2013-01-01T23:59:59.000Z

88

Single-trip tubing-conveyed perforating, production testing, and pressure-buildup testing in nonflowing wells  

SciTech Connect

This paper describes tools and procedures for tubing-conveyed perforating (TCP) and subsequent production testing of a well with a reverse-flow jet pump with a specially designed blanking sleeve. A downhole shut-in pressure buildup is also obtained and all equipment is pressure-actuated, eliminating the use of wireline.

Barnes, J.A.; Snider, P.M. (Marathon Oil Co. (US)); Swafford, C.V. (BST Lift Systems (US))

1991-05-01T23:59:59.000Z

89

Interference Fracturing: Non-Uniform Distributions of Perforation Clusters that Promote Simultaneous Growth of Multiple Hydraulic Fractures  

E-Print Network (OSTI)

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

Peirce, Anthony

90

Influence of gas flow rate on liquid distribution in trickle-beds using perforated plates as liquid distributors  

E-Print Network (OSTI)

" the distribution imposed at the top of the reactor. Finally, a comparison between the two measuring techniques-beds reactors, the second will directly affect its performances. Indeed, a bad liquid distribution will not only distribution when fluids distribution on top of the reactor is ensured by a perforated plate. In opposition

Paris-Sud XI, Université de

91

Mapping the surgery exact sequence for topological manifolds to analysis.  

E-Print Network (OSTI)

In this paper we prove the existence of a natural mapping from the surgery exact sequence for topological manifolds to the analytic surgery exact sequence of N. Higson and J. Roe. This generalizes the theorem of N. Higson and J. Roe, that is developed in the smooth setting, using the Lipschitz signature operator of Teleman and the methods elaborated by P. Piazza and T. Schick.

Vito Felice Zenobi

92

Finite Action Yang-Mills Solutions on the Group Manifold  

E-Print Network (OSTI)

We demonstrate that the left (and right) invariant Maurer-Cartan forms for any semi-simple Lie group enable one to construct solutions of the Yang-Mills equations on the group manifold equipped with the natural Cartan-Killing metric. For the unitary unimodular groups the Yang-Mills action integral is finite for such solutions. This is explicitly exhibited for the case of $SU(3)$.

T Dereli; J Schray; Robin W Tucker

1996-05-17T23:59:59.000Z

93

Evaluation of selective vs. point-source perforating for hydraulic fracturing  

SciTech Connect

This paper is a case history comparing and evaluating the effects of fracturing the Reef Ridge Diatomite formation in the Midway-Sunset Field, Kern County, California, using {open_quotes}select-fire{close_quotes} and {open_quotes}point-source{close_quotes} perforating completions. A description of the reservoir, production history, and fracturing techniques used leading up to this study is presented. Fracturing treatment analysis and production history matching were used to evaluate the reservoir and fracturing parameters for both completion types. The work showed that single fractures were created with the point-source (PS) completions, and multiple fractures resulted from many of the select-fire (SF) completions. A good correlation was developed between productivity and the product of formation permeability, net fracture height, bottomhole pressure, and propped fracture length. Results supported the continued development of 10 wells using the PS concept with a more efficient treatment design, resulting in substantial cost savings.

Underwood, P.J.; Kerley, L.

1996-12-31T23:59:59.000Z

94

Measuring Aerosols Generated Inside Armoured Vehicles Perforated by Depleted Uranium Ammunition  

SciTech Connect

In response to questions raised after the Gulf War about the health significance of exposure to depleted uranium (DU), a study was initiated to provide an improved scientific basis for assessment of possible health effects of soldiers in vehicles struck by these munitions. As part of this experimental study, a series of DU penetrators were fired at an Abrams tank and a Bradley fighting vehicle, and the aerosols generated by vehicle perforation were collected and characterized. The aerosol sampling system designed for these tests consisted of filter cassettes, cascade impactors, a five-stage cyclone, and a moving filter. Aerosols collected were analyzed for uranium concentration and particle size distribution as a function of time. The aerosol samples were also analyzed for uranium oxide phases, particle morphology, and in vitro solubility. These data will provide input for use in future prospective and retrospective dose and health risk assessments of DU aerosols.

Parkhurst, MaryAnn

2003-01-01T23:59:59.000Z

95

Milnor-Wood inequalities for manifolds locally isometric to a product of hyperbolic planes  

E-Print Network (OSTI)

This note describes sharp Milnor--Wood inequalities for the Euler number of flat oriented vector bundles over closed Riemannian manifolds locally isometric to products of hyperbolic planes. One consequence is that such manifolds do not admit an affine structure, confirming Chern--Sullivan's conjecture in this case. The manifolds under consideration are of particular interest, since in contrary to many other locally symmetric spaces they do admit flat vector bundle of the corresponding dimension. When the manifold is irreducible and of higher rank, it is shown that flat oriented vector bundles are determined completely by the sign of the Euler number.

Bucher, Michelle

2008-01-01T23:59:59.000Z

96

Induced matter: Curved N-manifolds encapsulated in Riemann-flat N+1 dimensional space  

E-Print Network (OSTI)

Liko and Wesson have recently introduced a new 5-dimensional induced matter solution of the Einstein equations, a negative curvature Robertson-Walker space embedded in a Riemann flat 5-dimensional manifold. We show that this solution is a special case of a more general theorem prescribing the structure of certain N+1-dimensional Riemann flat spaces which are all solutions of the Einstein equations. These solutions encapsulate N-dimensional curved manifolds. Such spaces are said to "induce matter" in the sub-manifolds by virtue of their geometric structure alone. We prove that the N-manifold can be any maximally symmetric space.

Harry I. Ringermacher; Lawrence R. Mead

2005-11-02T23:59:59.000Z

97

Special Killing forms on toric Sasaki-Einstein manifolds  

E-Print Network (OSTI)

In this paper we study the interplay between complex coordinates on the Calabi-Yau metric cone and the special Killing forms on the toric Sasaki-Einstein manifold. In the general case we give a procedure to locally construct the special Killing forms. In the final part we exemplify the general scheme in the case of the $5-$dimensional $Y^{p,q}$ spaces, identifying the additional special Killing 2-forms which were previously obtained by the second author of the present paper, but with a different method, in [Mod. Phys. Lett. A 27 (2012) 1250217].

Vladimir Slesar; Mihai Visinescu; Gabriel Eduard Vilcu

2014-03-05T23:59:59.000Z

98

Changes in Perforation-Induced Formation Damage With Degree of Underbalance: Comparison of Sandstone and Limestone Formations  

SciTech Connect

Field data and recently developed models provide some guidance for estimating the underbalance needed to obtain fully functional perforations, but there are little data available that relate flow efficiency to lower underbalances in different rock types. To improve understanding of the surge cleanup process, we have performed two series of perforation flow tests in Berea Sandstone and in Bedford Limestone cores at increasing levels of underbalance. Flow tests were performed according to modified API RP43, section 4 test procedures. At the conclusion of the tests, the cores were analyzed using high-resolution X-ray CT techniques. The shape, dimensions and total volumes of both the open tunnel and the remaining embedded liner metal were extracted from the CT data and correlated with the underbalance and with the flow test results. Open tunnel diameters and volumes are much lower in the limestone samples. While the amount of metal remaining in the tunnel and at the perforation tip decreases dramatically with underbalance in Berea Sandstone cores, the amount of metal is nearly constant in the limestone cores. Conversely, the tunnel volume increases with underbalance in the Sandstone cores but stays constant in the limestone. Core flow efficiency results correlate with these observations. There is a sharp increase in CFE in the sandstone samples as the tunnel volumes increase and little change in CFE in the limestone samples corresponding to unchanging tunnel volume. The tests also offer some evidence of the cleanup mechanism at the perforation tip, at least in the sandstone cores. Samples at intermediate underbalance levels show evidence of open tunnel space in an annulus surrounding the metal slug at the tip. This suggests that cleanup may proceed at least partially by axial flow through crushed rock surrounding the metal. As this material erodes away, the metal is loosened and is flushed from the tunnel. Existing models for cleanup are based primarily on radial flow.

Detwiler, R; Halleck, P M; Karacan, C O; Hardesty, J

2003-10-22T23:59:59.000Z

99

A Collapse Surface for Perforated Plates with Triangular Patterns for Ligament Efficiencies Between 0.05 and 0.50  

SciTech Connect

Collapse surfaces are developed for thick perforated plates containing a triangular penetration pattern with ligament efficiencies of 0.05, 0.10, 0.15, 0.2, 0.3, and 0.5 using elastic-perfectly plastic FEA analysis. The FEA data was fit to a fourth-order collapse function which is appropriate for the development of an equivalent solid elastic-perfectly plastic plasticity model for perforated plates with triangular penetration patterns. This type of model can be conveniently used to develop a limit load capability for perforated plate analysis. It was shown that the fourth-order function is reasonable for ligament efficiencies between 0.15 to 0.5. Comparing the fourth-order collapse function to FEA data suggests that an alternate collapse function is needed for ligament efficiencies less than 0.15. A linear interpolation method was shown to be appropriate for ligament efficiencies between 0.15 and 0.5.

D.P. Jones and J.L. Gordon

2000-12-14T23:59:59.000Z

100

Simultaneously enhanced transmission and artificial optical activity in gold film perforated with chiral hole array  

Science Journals Connector (OSTI)

We propose a simple two-dimensional metallic periodic chiral structure (PCS) consisting of a dielectric substrate and a thin gold film perforated with gammadion-shaped chiral hole array, in which the transmittance and artificial optical activity can be simultaneously enhanced. The principle and optical performance of the PCS are demonstrated through the experimental realization of a PCS sample, from numerical design, fabrication, to optical characterization. Good agreement between theory and experiment has been obtained. The PCS sample shows an enhanced transmittance of 53% at wavelength 1168 nm, accompanied nearby by a polarization rotation peak with the effective specific rotatory power up to 105?deg/mm. The enhancement mechanism of the dual effect is thoroughly studied by investigating the optical anomalies (i.e., Rayleigh anomalies, surface plasmon polaritons, and localized surface plasmons) in the PCS and their roles in the light-matter interaction. Several light-anomaly coupling regimes have been revealed. The single-layer metallic PCS is relatively easy to realize in optical frequencies by using mature microfabrication techniques such as electron-beam lithography and lift-off technique. The physical insight into the enhancement mechanism provides guidelines to develop more complicated PCS, such as multilayer PCS with metal and dielectric inclusions, which can produce stronger optical activity and better optical performance.

Benfeng Bai; Janne Laukkanen; Anni Lehmuskero; Jari Turunen

2010-03-15T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Measuring Aerosols Generated Inside Armoured Vehicles Perforated by Depleted Uranium Ammunition  

SciTech Connect

In response to questions raised after the Gulf War about the health significance of exposure to depleted uranium (DU), the U.S. Department of Defense initiated a study designed to provide an improved scientific basis for assessment of possible health effects of soldiers in vehicles struck by these munitions. As part of this study, a series of DU penetrators were fired at an Abrams tank and a Bradley fighting vehicle, and the aerosols generated by vehicle perforation were collected and characterized. A robust sampling system was designed to collect aerosols in this difficult environment and to monitor continuously the sampler flow rates. Interior aerosols collected were analyzed for uranium concentration and particle size distribution as a function of time. They were also analyzed for uranium oxide phases, particle morphology, and dissolution in vitro. These data will provide input for future prospective and retrospective dose and health risk assessments of inhaled or ingested DU aerosols. This paper briefly discusses the target vehicles, firing trajectories, aerosol samplers and instrumentation control systems, and the types of analyses conducted on the samples.

Parkhurst, MaryAnn (BATTELLE (PACIFIC NW LAB))

2003-01-01T23:59:59.000Z

102

Time Step Expansions and the Invariant Manifold Approach to Lattice Boltzmann  

E-Print Network (OSTI)

Time Step Expansions and the Invariant Manifold Approach to Lattice Boltzmann Models D.J. Packwood dynamics of a lattice Boltzmann system is to use a combination of different approximations and expan- sions, common to all lattice Boltzmann schemes, give rise to a slow invariant manifold. We perform a time step

Gorban, Alexander N.

103

Projective metric realizations of cone-manifolds with singularities along 2-bridge knots and links  

E-Print Network (OSTI)

Projective metric realizations of cone-manifolds with singularities along 2-bridge knots and links. In particular, for some cone-manifolds with singularities along 2-bridge knots and links we give explicit homogeneous 3-geometries, which are also referred as Thurston geometries: E3 , S3 , H3 , S2 ? R, H2 ? R, SL2(R

104

L-THEORY OF 3-MANIFOLDS WITH NON-VANISHING FIRST BETTI NUMBER  

E-Print Network (OSTI)

L-THEORY OF 3-MANIFOLDS WITH NON-VANISHING FIRST BETTI NUMBER Sayed K. Roushon Abstract;rst Betti number can be computed in terms of a generalized homology theory. A consequence compact irreducible 3-manifold M with nonempty boundary has nonzero #12;rst Betti number, it is natural

Roushon, S. K.

105

VOLUMES OF HYPERBOLIC 3-MANIFOLDS OF BETTI NUMBER AT LEAST 3  

E-Print Network (OSTI)

VOLUMES OF HYPERBOLIC 3-MANIFOLDS OF BETTI NUMBER AT LEAST 3 that the smallest volume hyperbolic 3-manifold has betti number at least 3. In the process, we improve betti number at least 3, then its volume is at least 0.94689 and hence it is not the smallest

Przeworski, Andrew

106

Hamilton-Jacobi Equations on a Manifold and Applications to Grid Generation or Re nement.  

E-Print Network (OSTI)

Hamilton-Jacobi Equations on a Manifold and Applications to Grid Generation or Re#28;nement. Ph Hamilton-Jacobi equations on a manifold, typically on the graph of some previously computed function z method. Keywords: Hamilton-Jacobi equations, viscosity solutions, level set method, adaptative meshes

107

Analytical invariant manifolds near unstable points and the structure of chaos  

E-Print Network (OSTI)

It is known that the asymptotic invariant manifolds around an unstable periodic orbit in conservative systems can be represented by convergent series (Cherry 1926, Moser 1956, 1958, Giorgilli 2001). The unstable and stable manifolds intersect at an infinity of homoclinic points, generating a complicated homoclinic tangle. In the case of simple mappings it was found (Da Silva Ritter et al. 1987) that the domain of convergence of the formal series extends to infinity along the invariant manifolds. This allows in practice to study the homoclinic tangle using only series. However in the case of Hamiltonian systems, or mappings with a finite analyticity domain,the convergence of the series along the asymptotic manifolds is also finite. Here, we provide numerical indications that the convergence does not reach any homoclinic points. We discuss in detail the convergence problem in various cases and we find the degree of approximation of the analytical invariant manifolds to the real (numerical) manifolds as i) the order of truncation of the series increases, and ii) we use higher numerical precision in computing the coefficients of the series. Then we introduce a new method of series composition, by using action-angle variables, that allows the calculation of the asymptotic manifolds up to an a arbitrarily large extent. This is the first case of an analytic development that allows the computation of the invariant manifolds and their intersections in a Hamiltonian system for an extent long enough to allow the study of homoclinic chaos by analytical means.

C. Efthymiopoulos; G. Contopoulos; M. Katsanikas

2014-04-30T23:59:59.000Z

108

Milnor-Wood inequalities for manifolds which are locally a product of surfaces  

E-Print Network (OSTI)

The classical Milnor-Wood inequalities for the Euler number of flat oriented vector bundles over surfaces are generalized for higher dimensional closed manifolds that admit a local structure of products of planes. These include products of surfaces as well as closed Hilbert-Blumenthal modular varieties. As a consequence, the Chern Conjecture is confirmed for such manifolds. For manifolds admitting a rigid locally symmetric structure, a complete classification is given for the flat vector bundles with nonzero Euler number. Some of the main results were announced in C.R. Acad. Sci. Paris, Ser. I 346 (2008) 661-666.

Bucher, Michelle

2009-01-01T23:59:59.000Z

109

Variable geometry exhaust manifold turbocharging system for an 8-cylinder marine diesel engine  

Science Journals Connector (OSTI)

The variable geometry exhaust manifold (VGEM) turbocharging system can realize the switch between two charging modes by the switching valve, and it can give a good performance both at the high load operation and ...

Lei Shi; Shaoming Wang; Kangyao Deng; Yi Cui

2012-06-01T23:59:59.000Z

110

Mechanical Systems on an almost Khler model of a Finsler Manifold  

E-Print Network (OSTI)

In this study, we present a new analogue of Euler-Lagrange and Hamilton equations on an almost K\\"ahler model of a Finsler manifold. Also, we give some corollories about the related mechanical systems and equations.

Mehmet Tekkoyun; O?uzhan elik

2012-11-06T23:59:59.000Z

111

Quaternionic Bundles and Betti Numbers of Symplectic 4-Manifolds with Kodaira Dimension Zero  

E-Print Network (OSTI)

Symplectic 4-manifolds with Kodaira dimension zero can be viewed as symplectic Calabi-Yau surfaces. We are able to completely determine their Betti numbers by proving two general results on quaternionic vector bundles.

Tian-Jun Li

2006-12-07T23:59:59.000Z

112

Charting a manifold Matthew Brand, MERL (draft revised Oct 2002 to appear NIPS'02)  

E-Print Network (OSTI)

Charting a manifold Matthew Brand, MERL (draft revised Oct 2002 to appear NIPS'02) Abstract We to untie knots, unroll and untwist sheets, and visualize/compress high-dimensional biomechanical and image

Roberts, Stephen

113

"Stable Prime Decompositions of Four-Manifolds" Matthias Kreck, Wolfgang Luck  

E-Print Network (OSTI)

Mi with i = 1(Mi). Stably means that one allows additional connected sums with some copies of S2 ? S2 is oriented diffeomorphic to a connected sum n i=1Mi of oriented manifolds Mi which are prime, i.e. if Mi is diffeomorphic to Mi Mi then Mi or Mi is oriented diffeomorphic to S3 . The manifolds Mi are unique up to order

Teichner, Peter

114

Quantifying The Complexity Of Geodesic Paths On Curved Statistical Manifolds Through Information Geometric Entropies and Jacobi Fields  

E-Print Network (OSTI)

We characterize the complexity of geodesic paths on a curved statistical manifold M_{s} through the asymptotic computation of the information geometric complexity V_{M_{s}} and the Jacobi vector field intensity J_{M_{s}}. The manifold M_{s} is a 2l-dimensional Gaussian model reproduced by an appropriate embedding in a larger 4l-dimensional Gaussian manifold and endowed with a Fisher-Rao information metric g_{{\\mu}{\

Carlo Cafaro; Stefano Mancini

2010-11-25T23:59:59.000Z

115

Dissociations of the Medial and Lateral Perforant Path Projections Into Dorsal DG, CA3, and CA1 for Spatial and Nonspatial (Visual Object)  

E-Print Network (OSTI)

-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

Wagner, Anthony

116

Coherent quantum dynamics in steady-state manifolds of strongly dissipative systems  

E-Print Network (OSTI)

It has been recently realized that dissipative processes can be harnessed and exploited to the end of coherent quantum control and information processing. In this spirit we consider strongly dissipative quantum systems admitting a non-trivial manifold of steady states. We show how one can enact adiabatic coherent unitary manipulations e.g., quantum logical gates, inside this steady-state manifold by adding a weak, time-rescaled, Hamiltonian term into the system's Liouvillian. The effective long-time dynamics is governed by a Fermi golden rule type Hamiltonian which results from the interplay between the weak unitary control and the fast relaxation process. The leakage outside the steady-state manifold entailed by the Hamiltonian term is suppressed by an environment-induced symmetrization of the dynamics. We present applications to quantum-computation in decoherence-free subspaces and noiseless subsystems and numerical analysis of non-adiabatic errors.

Paolo Zanardi; Lorenzo Campos Venuti

2014-04-18T23:59:59.000Z

117

The abstract boundary---a new approach to singularities of manifolds  

E-Print Network (OSTI)

A new scheme is proposed for dealing with the problem of singularities in General Relativity. The proposal is, however, much more general than this. It can be used to deal with manifolds of any dimension which are endowed with nothing more than an affine connection, and requires a family \\calc\\ of curves satisfying a {\\em bounded parameter property} to be specified at the outset. All affinely parametrised geodesics are usually included in this family, but different choices of family \\calc\\ will in general lead to different singularity structures. Our key notion is the {\\em abstract boundary\\/} or {\\em $a$-boundary\\/} of a manifold, which is defined for any manifold \\calm\\ and is independent of both the affine connection and the chosen family \\calc\\ of curves. The $a$-boundary is made up of equivalence classes of boundary points of \\calm\\ in all possible open embeddings. It is shown that for a pseudo-Riemannian manifold $(\\calm,g)$ with a specified family \\calc\\ of curves, the abstract boundary points can then be split up into four main categories---regular, points at infinity, unapproachable points and singularities. Precise definitions are also provided for the notions of a {\\em removable singularity} and a {\\em directional singularity}. The pseudo-Riemannian manifold will be said to be singularity-free if its abstract boundary contains no singularities. The scheme passes a number of tests required of any theory of singularities. For instance, it is shown that all compact manifolds are singularity-free, irrespective of the metric and chosen family \\calc.

Susan M. Scott; Peter Szekeres

1994-05-26T23:59:59.000Z

118

The Construction of Zonal Models of Dispersion in Channels via Matched Centre Manifolds  

E-Print Network (OSTI)

Taylor's model of dispersion simply describes the long-term spread of material along a pipe, channel or river. However, often we need multi-mode models to resolve finer details in space and time. Here we construct zonal models of dispersion via the new principle of matching their long-term evolution with that of the original problem. Using centre manifold techniques this is done straightforwardly and systematically. Furthermore, this approach provides correct initial and boundary conditions for the zonal models. We expect the proposed principle of matched centre manifold evolution to be useful in a wide range of modelling problems.

S. D. Watt; A. J. Roberts

1994-12-02T23:59:59.000Z

119

Dictionary learning on the manifold of square root densities and application to reconstruction of diffusion propagator fields  

Science Journals Connector (OSTI)

In this paper, we present a novel dictionary learning framework for data lying on the manifold of square root densities and apply it to the reconstruction of diffusion propagator (DP) fields given a multi-shell diffusion MRI data set. Unlike most of ... Keywords: DW-MRI, dictionary learning, diffusion propagator reconstruction, manifold

Jiaqi Sun; Yuchen Xie; Wenxing Ye; Jeffrey Ho; Alireza Entezari; Stephen J. Blackband; Baba C. Vemuri

2013-06-01T23:59:59.000Z

120

Manifold modeling for brain population analysis Samuel Gerber *, Tolga Tasdizen, P. Thomas Fletcher, Sarang Joshi, Ross Whitaker, and the Alzheimers  

E-Print Network (OSTI)

Manifold 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 a method for building efficient representations of large sets of brain images. Our hypothesis

Utah, University of

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

An experimental investigation of sand transport in inclined eccentric annuli  

E-Print Network (OSTI)

'fill-up' period. Okranjniso studied the effects of fluid rheology in 1981. He pointed out the importance of yield value on cuttings transport, and showed that the ratio of yield point over plastic viscosity (YP/PV) has significant effect on particle... beds are substantially reduced by small increases in mud weight. 3) Drillpipe rotation reduces annular cuttings buildup under certain conditions. 4) Under normal drilling practices, as much as half the annular area can be filled with a cuttings bed...

McClellan, John Christopher

2012-06-07T23:59:59.000Z

122

Invariant Manifolds for the Station Keeping of Solar Sails Ariadna Farres, AJ  

E-Print Network (OSTI)

Invariant Manifolds for the Station Keeping of Solar Sails Ariadna Farr´es, AJ Universitat de 2 / 45 inria-00585612,version1-14Apr2011 #12;Background What is a Solar Sail ? Solar Sails are a new concept of spacecraft propulsion that takes ad- vantage of the Solar radiation pressure to propel

Boyer, Edmond

123

SHORT GEODESIC SEGMENTS BETWEEN TWO POINTS ON A CLOSED RIEMANNIAN MANIFOLD  

E-Print Network (OSTI)

SHORT GEODESIC SEGMENTS BETWEEN TWO POINTS ON A CLOSED RIEMANNIAN MANIFOLD Alexander Nabutovsky there exist at least k distinct geodesics of length at most 20k!d between these points for every positive that for any pair of points on a closed Riemannian man- ifold Mn there exist infinitely many geodesics

Nabutovsky, Alexander

124

Multi-robot Coverage and Exploration on Riemannian Manifolds with Boundary  

E-Print Network (OSTI)

Multi-robot Coverage and Exploration on Riemannian Manifolds with Boundary Subhrajit Bhattacharya Robert Ghrist Vijay Kumar Abstract Multi-robot coverage and exploration are fundamental problems in robotics. A widely-used, efficient and distributable algorithm for achieving coverage of a convex

Ghrist, Robert W.

125

Integral manifolding structure for fuel cell core having parallel gas flow  

DOE Patents (OSTI)

Disclosed herein are manifolding means for directing the fuel and oxidant gases to parallel flow passageways in a fuel cell core. Each core passageway is defined by electrolyte and interconnect walls. Each electrolyte and interconnect wall consists respectively of anode and cathode materials layered on the opposite sides of electrolyte material, or on the opposite sides of interconnect material. A core wall projects beyond the open ends of the defined core passageways and is disposed approximately midway between and parallel to the adjacent overlaying and underlying interconnect walls to define manifold chambers therebetween on opposite sides of the wall. Each electrolyte wall defining the flow passageways is shaped to blend into and be connected to this wall in order to redirect the corresponding fuel and oxidant passageways to the respective manifold chambers either above or below this intermediate wall. Inlet and outlet connections are made to these separate manifold chambers respectively, for carrying the fuel and oxidant gases to the core, and for carrying their reaction products away from the core.

Herceg, Joseph E. (Naperville, IL)

1984-01-01T23:59:59.000Z

126

Integral manifolding structure for fuel cell core having parallel gas flow  

DOE Patents (OSTI)

Disclosed herein are manifolding means for directing the fuel and oxidant gases to parallel flow passageways in a fuel cell core. Each core passageway is defined by electrolyte and interconnect walls. Each electrolyte and interconnect wall consists respectively of anode and cathode materials layered on the opposite sides of electrolyte material, or on the opposite sides of interconnect material. A core wall projects beyond the open ends of the defined core passageways and is disposed approximately midway between and parallel to the adjacent overlaying and underlying interconnect walls to define manifold chambers therebetween on opposite sides of the wall. Each electrolyte wall defining the flow passageways is shaped to blend into and be connected to this wall in order to redirect the corresponding fuel and oxidant passageways to the respective manifold chambers either above or below this intermediate wall. Inlet and outlet connections are made to these separate manifold chambers respectively, for carrying the fuel and oxidant gases to the core, and for carrying their reaction products away from the core.

Herceg, J.E.

1983-10-12T23:59:59.000Z

127

"Stable Prime Decompositions of Four-Manifolds" Matthias Kreck, Wolfgang Luck  

E-Print Network (OSTI)

Mi with i = 1(Mi). Stably means that one allows additional connected sums with some copies of S2 ? S2 de- composition. Namely, M is oriented diffeomorphic to a connected sum n i=1Mi of oriented manifolds Mi which are prime, i.e. if Mi is diffeomorphic to Mi Mi , then Mi or Mi is oriented diffeomorphic

Lück, Wolfgang

128

Motion Tasks and Force Control for Robot Manipulators on Embedded 2-D Manifolds  

E-Print Network (OSTI)

a challenging problem of the robotics field with many appli- cations including robotic surface painting, surfaceMotion Tasks and Force Control for Robot Manipulators on Embedded 2-D Manifolds Xanthi Papageorgiou the end effector of a robotic manipulator across the surface of an object in the workspace

Loizou, Savvas G.

129

Motion Tasks for Robot Manipulators on Embedded 2-D Manifolds under Input Constraints  

E-Print Network (OSTI)

a task along a particular surface, such as robotic surface painting, surface cleaning, and surfaceMotion Tasks for Robot Manipulators on Embedded 2-D Manifolds under Input Constraints Xanthi the end effector of a robotic manipulator, which is constrained in terms of joint rates, on the surface

Tanner, Herbert G.

130

Manifold-based starting point generation and its application to distillation  

E-Print Network (OSTI)

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

Neumaier, Arnold

131

Symmetry operators for Dirac's equation on two-dimensional spin manifolds  

E-Print Network (OSTI)

It is shown that the second order symmetry operators for the Dirac equation on a general two-dimensional spin manifold may be expressed in terms of Killing vectors and valence two Killing tensors. The role of these operators in the theory of separation of variables for the Dirac equation is studied.

Lorenzo Fatibene; Raymond G. McLenaghan; Giovanni Rastelli; Shane N. Smith

2008-12-11T23:59:59.000Z

132

A NOTE ON THE GROWTH OF BETTI NUMBERS AND RANKS OF 3-MANIFOLD GROUPS  

E-Print Network (OSTI)

A NOTE ON THE GROWTH OF BETTI NUMBERS AND RANKS OF 3-MANIFOLD GROUPS STEFAN FRIEDL Abstract. Let N with `fast' growth of Betti numbers as well as a cofinal filtration of 1(N) with `slow' growth of ranks. 1 it is of interest to study how the following measures of `complexity' grow: (1) the first Betti number b1(i) = dim H

Friedl, Stefan

133

ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING  

E-Print Network (OSTI)

ESTIMATION OF EXHAUST MANIFOLD PRESSURE IN TURBOCHARGED GASOLINE ENGINES WITH VARIABLE VALVE TIMING in turbocharged gasoline engines with variable valve timing requires knowledge of exhaust mani- fold pressure, Pe control systems for gasoline engines rely heavily on feedforward air-fuel ratio (A/F) control to meet

Grizzle, Jessy W.

134

A landscape of non-supersymmetric AdS vacua on coset manifolds  

E-Print Network (OSTI)

We construct new families of non-supersymmetric sourceless type IIA AdS4 vacua on those coset manifolds that also admit supersymmetric solutions. We investigate the spectrum of left-invariant modes and find that most, but not all, of the vacua are stable under these fluctuations. Generically, there are also no massless moduli.

Paul Koerber; Simon Kors

2010-05-10T23:59:59.000Z

135

Locating an atmospheric contamination source using slow manifolds Wenbo Tang,1  

E-Print Network (OSTI)

the origin of atmospheric particle pollution from dispersed particle positions, provided that diffusion efLocating an atmospheric contamination source using slow manifolds Wenbo Tang,1 George Haller,2,a-dimensional atmospheric wind field in an urban street canyon. © 2009 American Institute of Physics. DOI: 10

Tang, Wenbo

136

HEAT KERNEL ON A NON-COMPACT RIEMANNIAN MANIFOLD Alexander Grigor'yan  

E-Print Network (OSTI)

HEAT KERNEL ON A NON-COMPACT RIEMANNIAN MANIFOLD Alexander Grigor'yan Dedicated to E.M.Landis 0. Introduction This paper is a survey of some recent results on the heat kernel of a non-compact complete of properties of the heat kernel in different contexts. In the present paper, we are mainly concerned with a new

Grigor'yan, Alexander

137

Non-streaming high-efficiency perforated semiconductor neutron detectors, methods of making same and measuring wand and detector modules utilizing same  

DOE Patents (OSTI)

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.

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

138

A method to extend flamelet manifolds for prediction of NOx and long time scale species with tabulated chemistry  

Science Journals Connector (OSTI)

Numerical simulation is currently used to help design low NOx devices for aircraft engines. In order to improve the prediction of pollutant species, combustion models based on tabulated chemistry have been commonly used in recent years. However, the short time scales of usual flamelet manifolds can lead to errors concerning the NO prediction in post flame area, as shown in this paper. Thus, a new method is proposed to extend the manifold in order to describe the evolution of species with a long characteristic time. This method is tested in the framework of 0D-1D computations. The use of the extended manifold is shown to be necessary to correctly predict the evolution of NO concentration in burnt gases. As an example, the extended and classical manifolds were compared in the framework of 2D simulations of an industrial-like combustor, showing an evident difference on the NO levels predicted in the outlet section.

Aymeric Boucher; Nicolas Bertier; Francis Dupoirieux

2014-01-01T23:59:59.000Z

139

On the counting function of the embedded eigenvalues for some manifold with cusps, and magnetic Laplacian  

E-Print Network (OSTI)

We consider a non compact, complete manifold {\\bf{M}} of finite area with cuspidal ends. The generic cusp is isomorphic to ${\\bf{X}}\\times ]1,+\\infty [$ with metric $ds^2=(h+dy^2)/y^{2\\delta}.$ {\\bf{X}} is a compact manifold with nonzero first Betti number equipped with the metric $h.$ For a one-form $A$ on {\\bf{M}} such that in each cusp $A$ is a non exact one-form on the boundary at infinity, we prove that the magnetic Laplacian $-\\Delta_A=(id+A)^\\star (id+A)$ satisfies the Weyl asymptotic formula with sharp remainder. We deduce an upper bound for the counting function of the embedded eigenvalues of the Laplace-Beltrami operator $-\\Delta =-\\Delta_0 .$

Morame, Abderemane

2011-01-01T23:59:59.000Z

140

Counting function of the embedded eigenvalues for some manifold with cusps, and magnetic Laplacian  

E-Print Network (OSTI)

We consider a non compact, complete manifold {\\bf{M}} of finite area with cuspidal ends. The generic cusp is isomorphic to ${\\bf{X}}\\times ]1,+\\infty [$ with metric $ds^2=(h+dy^2)/y^{2\\delta}.$ {\\bf{X}} is a compact manifold with nonzero first Betti number equipped with the metric $h.$ For a one-form $A$ on {\\bf{M}} such that in each cusp $A$ is a non exact one-form on the boundary at infinity, we prove that the magnetic Laplacian $-\\Delta_A=(id+A)^\\star (id+A)$ satisfies the Weyl asymptotic formula with sharp remainder. We deduce an upper bound for the counting function of the embedded eigenvalues of the Laplace-Beltrami operator $-\\Delta =-\\Delta_0.$

Abderemane Morame; Francoise Truc

2011-09-09T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

The Construction of Spinor Fields on Manifolds with Smooth Degenerate Metrics  

E-Print Network (OSTI)

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.

J Schray; T Dray; C A Manogue; R W Tucker; C Wang

1996-05-17T23:59:59.000Z

142

Bose-Einstein Condensation on a Manifold with Nonnegative Ricci Curvature  

E-Print Network (OSTI)

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.

Levent Akant; Emine Ertugrul; Ferzan Tapramaz; O. Teoman Turgut

2014-03-28T23:59:59.000Z

143

Perforation patterned electrical interconnects  

DOE Patents (OSTI)

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.

Frey, Jonathan

2014-01-28T23:59:59.000Z

144

Test results of a ceramic-based carbon monoxide sensor in the automotive exhaust manifold  

SciTech Connect

A prototype CO sensor based on the anatase phase of TiO{sub 2} was fabricated and tested in a Ford V6 engine. Fuel combustion was programmed to be near stoichiometric conditions, and emissions were monitored with an FT-IR analytical instrument. The sensor, positioned near the oxygen sensor in the exhaust manifold, was successfully tested for 50 cycles of revving and idling, and was observed to respond quickly and reproducibly. The sensor response was correlated to the CO concentration at specific engine temperatures and was found to vary systematically with increasing concentrations. The results are promising and the sensor shows potentials to monitor the efficiency of the catalytic converter.

Azad, A.M.; Younkman, L.B.; Akbar, S.A. [Ohio State Univ., Columbus, OH (United States)

1996-12-31T23:59:59.000Z

145

Smith theory, L2 cohomology, isometries of locally symmetric manifolds and moduli spaces of curves  

E-Print Network (OSTI)

We investigate periodic diffeomorphisms of non-compact aspherical manifolds (and orbifolds) and describe a class of spaces that have no homotopically trivial periodic diffeomorphisms. Prominent examples are moduli spaces of curves and aspherical locally symmetric spaces with non-vanishing Euler characteristic. In the irreducible locally symmetric case, we show that no complete metric has more symmetry than the locally symmetric metric. In the moduli space case, we build on work of Farb and Weinberger and prove an analogue of Royden's theorem for complete finite volume metrics.

Avramidi, Grigori

2011-01-01T23:59:59.000Z

146

SO(10) Grand Unification in M theory on a G2 manifold  

E-Print Network (OSTI)

We consider Grand Unified Theories based on $SO(10)$ which originate from string/$M$ theory on $G_2$ manifolds or Calabi-Yau spaces with discrete symmetries. In this framework we are naturally led to a novel solution of the doublet-triplet splitting problem previously considered by Dvali which involves an extra vector-like Standard Model family and light, but weakly coupled colour triplets. These additional states are predicted to be accessible at the LHC and also induce R-parity violation. Gauge coupling unification occurs with a larger GUT coupling.

Acharya, Bobby S; Romao, Miguel Crispim; King, Stephen F; Pongkitivanichkul, Chakrit

2015-01-01T23:59:59.000Z

147

Disorder Driven Roughening Transitions of Elastic Manifolds and Periodic Elastic Media  

E-Print Network (OSTI)

Abstract. The simultaneous effect of both disorder and crystal-lattice pinning on the equilibrium behavior of oriented elastic objects is studied using scaling arguments and a functional renormalization group technique. Our analysis applies to elastic manifolds, e.g., interfaces, as well as to periodic elastic media, e.g., charge-density waves or flux-line lattices. The competition between both pinning mechanisms leads to a continuous, disorder driven roughening transition between a flat state where the mean relative displacement saturates on large scales and a rough state with diverging relative displacement. The transition can be approached by changing the impurity concentration or, indirectly, by tuning the temperature since the pinning strengths of the random and crystal potential have in general a different temperature dependence. For D dimensional elastic manifolds interacting with either random-field or random-bond disorder a transition exists for 2 roughening transition exists only if the ratio p of the periodicities of the medium and the crystal lattice exceeds the critical value pc = 6/? ? ?. For p < pc the medium is always flat. Critical exponents are calculated in a double expansion in = p2 /p2 c ? 1 and ? = 4 ? D and fulfill the scaling relations of random field models. 1

unknown authors

2008-01-01T23:59:59.000Z

148

Global dynamics and inflationary center manifold and slow-roll approximants  

E-Print Network (OSTI)

We consider the familiar problem of a minimally coupled scalar field with quadratic potential in flat Friedmann-Lema\\^itre-Robertson-Walker cosmology to illustrate a number of techniques and tools, which can be applied to a wide range of scalar field potentials and problems in e.g. modified gravity. We present a global dynamical systems description that yields a global understanding of the solution space, including asymptotic features. We introduce dynamical systems techniques such as center manifold expansions and use Pad\\'e approximants to obtain improved approximations for the `attractor solution' at early times. We also show that future asymptotic behavior is associated with a limit cycle, which shows that self-similarity is asymptotically broken toward the future, and give approximative expressions for this behavior. We then combine these results to obtain global approximations for the attractor solution, which, e.g., might be used in the context of global measures. In addition we elucidate the connection between slow-roll based approximations and the attractor solution, and compare these approximations with the center manifold based approximants.

Artur Alho; Claes Uggla

2014-06-02T23:59:59.000Z

149

Rovibrational dynamics of the strontium molecule in the A1u+, c3u, and a3u+ manifold from state-of-the-art ab initio calculations  

E-Print Network (OSTI)

Rovibrational dynamics of the strontium molecule in the A1u+, c3u, and a3u+ manifold from state OF CHEMICAL PHYSICS 136, 194306 (2012) Rovibrational dynamics of the strontium molecule in the A 1 + u , c3 u for the electronic states in the A 1 + u , c3 u, and a 3 + u manifold of the strontium dimer, the spin

Koch, Christiane

150

Quantitative characterization of the water trimer torsional manifold by terahertz laser spectroscopy and theoretical analysis. II. ,,H2O...3  

E-Print Network (OSTI)

Quantitative characterization of the water trimer torsional manifold by terahertz laserLaughlin,c) Christy J. Keoshian, Ernest Michael, Jeff D. Cruzan,d) and Richard J. Saykallye) Department of Chemistry, University of California, Berkeley, California 94720 Ad van der Avoirdf) Institute of Theoretical Chemistry

Cohen, Ronald C.

151

Motion Tasks for Robot Manipulators on Embedded 2-D Manifolds Xanthi Papageorgiou, Savvas G. Loizou and Kostas J. Kyriakopoulos  

E-Print Network (OSTI)

including robotic surface painting, surface cleaning, surface inspection, etc. Our main motivation comesMotion Tasks for Robot Manipulators on Embedded 2-D Manifolds Xanthi Papageorgiou, Savvas G. Loizou of a robotic manipulator across the surface of an object in the workspace. Three typical tasks are considered

Loizou, Savvas G.

152

Resume of definitions of "tangent vector" Let M be a manifold, m M, and X = (X1  

E-Print Network (OSTI)

Resum´e of definitions of "tangent vector" Let M be a manifold, m M, and X = (X1 , · · ·Xd ) : U Joel Feldman. 2008. All rights reserved. September 30, 2008 Resum´e of definitions of "tangent vector rights reserved. September 30, 2008 Resum´e of definitions of "tangent vector" 2 #12;

Feldman, Joel

153

Invariance properties of boundary sets of open embeddings of manifolds and their application to the abstract boundary  

E-Print Network (OSTI)

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.

Christopher J. Fama; Susan M. Scott

1994-06-21T23:59:59.000Z

154

3D CFD ELECTROCHEMICAL AND HEAT TRANSFER MODEL OF AN INTERNALLY MANIFOLDED SOLID OXIDE ELECTROLYSIS CELL  

SciTech Connect

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.

Grant L. Hawkes; James E. O'Brien; Greg Tao

2011-11-01T23:59:59.000Z

155

Design and analysis of a high heat load pin-post monochromator crystal with an integral water manifold  

SciTech Connect

Conventional minichannel water cooling geometry will not perform satisfactorily for x-radiation from a wiggler source at the Advanced Photon Source. For closed-gap wiggler operation, cryogenic silicon appears to be the only option for crystals in Bragg-Bragg geometry. For operation of the wiggler at more modest critical energies ({lt}17 keV), the first crystal can be cooled by a pin-post cooling scheme, using water at room temperature as a coolant. In order to limit the water consumption to 4 gpm and hence the risk of introducing vibrations to the crystal, the intensely cooled area of the crystal was matched to the footprint of the beam, leaving a less cooled area of the crystal subject to survival in a missteered beam but not to perform as a monochromator. The manifold design avoids large areas of high water pressure that would bow the crystal. We present here the design of a pin-post monochromator consisting of a four-layer silicon manifold system and an integrally bonded 39{percent} nickel-iron alloy base plate. A transparent prototype of the design will be exhibited. Fabrication techniques and design advantages will be discussed. {copyright} {ital 1996 American Institute of Physics.}

Schildkamp, W. [Consortium for Advanced Radiation Sources, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637 (United States)] [Consortium for Advanced Radiation Sources, University of Chicago, 5640 S. Ellis Ave., Chicago, IL 60637 (United States); Tonnessen, T. [Rocketdyne Albuquerque Operations, 2511 C. Broadbent Parkway, N.E., Albuquerque, NM 87107 (United States)] [Rocketdyne Albuquerque Operations, 2511 C. Broadbent Parkway, N.E., Albuquerque, NM 87107 (United States)

1996-09-01T23:59:59.000Z

156

On the limiting behavior of the Brown-York quasi-local mass in asymptotically hyperbolic manifolds  

E-Print Network (OSTI)

We show that the limit at infinity of the vector-valued Brown-York-type quasi-local mass along any coordinate exhaustion of an asymptotically hyperbolic $3$-manifold satisfying the relevant energy condition on the scalar curvature has the conjectured causal character. Our proof uses spinors and relies on a Witten-type formula expressing the asymptotic limit of this quasi-local mass as a bulk integral which manifestly has the right sign under the above assumptions. In the spirit of recent work by Hijazi, Montiel and Raulot, we also provide another proof of this result which uses the theory of boundary value problems for Dirac operators on compact domains to show that a certain quasi-local mass, which converges to the Brown-York mass in the asymptotic limit, has the expected causal character under suitable geometric assumptions.

Ezequiel Barbosa; Levi Lopes de Lima; Frederico Giro

2014-07-02T23:59:59.000Z

157

An experimental study of the relationship between cuttings deposition and wellbore inclination in eccentric annuli  

E-Print Network (OSTI)

of Inclination on Cuttings Deposition (0 rpm data) 6 90 % Confidence Band on Regression Mean (0 rpm, AV = 2 ft/sec) 7 90 % Confidence Band on Regression Mean (0 rpm, AV = 3 ft/sec) 8 90 % Confidence Band on Regression Mean (0 rptn, AV = 4 ft/sec) 9 Effect... of Flow Rate on Cuttings Deposition (0 rpm data) 10 Mobil Data Comparison (0 rpm, AV = 2 ft/sec) 11 Mobil Data Comparison (0 rpm, AV = 3 ft/sec) 12 Mobil Data Comparison (0 rpm, AV = 4 ft/sec) 13 Iyoho Data Comparison (0 rpm data) page 26 44 45...

Colbert, John Wesley

2012-06-07T23:59:59.000Z

158

arXiv:1306.4564v1[math.GT]19Jun2013 Bitwist manifolds and two-bridge knots  

E-Print Network (OSTI)

arXiv:1306.4564v1[math.GT]19Jun2013 Bitwist manifolds and two-bridge knots J. W. CANNON W. J. FLOYD, explicit, and simple face-pairing descriptions of all of the branched cyclic covers of S3 branched over two-bridge for F1 , S1 , K+ , and K- 7. Surgery diagrams for the general two-bridge knot 8. Continued Fractions 9

Purcell, Jessica

159

AHF: Array-Based Half-Facet Data Structure for Mixed-Dimensional and Non-Manifold Meshes  

SciTech Connect

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.

Dyedov, Volodymyr; Ray, Navamita; Einstein, Daniel R.; Jiao, Xiangmin; Tautges, T.

2014-08-31T23:59:59.000Z

160

Objected constrained registration and manifold learning: A new patient setup approach in image guided radiation therapy of thoracic cancer  

SciTech Connect

Purpose: The management of thoracic malignancies with radiation therapy is complicated by continuous target motion. In this study, a real time motion analysis approach is proposed to improve the accuracy of patient setup. Methods: For 11 lung cancer patients a long training fluoroscopy was acquired before the first treatment, and multiple short testing fluoroscopies were acquired weekly at the pretreatment patient setup of image guided radiotherapy (IGRT). The data analysis consisted of three steps: first a 4D target motion model was constructed from 4DCT and projected to the training fluoroscopy through deformable registration. Then the manifold learning method was used to construct a 2D subspace based on the target motion (kinetic) and location (static) information in the training fluoroscopy. Thereafter the respiratory phase in the testing fluoroscopy was determined by finding its location in the subspace. Finally, the phase determined testing fluoroscopy was registered to the corresponding 4DCT to derive the pretreatment patient position adjustment for the IGRT. The method was tested on clinical image sets and numerical phantoms. Results: The registration successfully reconstructed the 4D motion model with over 98% volume similarity in 4DCT, and over 95% area similarity in the training fluoroscopy. The machine learning method derived the phase values in over 98% and 93% test images of the phantom and patient images, respectively, with less than 3% phase error. The setup approach achieved an average accumulated setup error less than 1.7 mm in the cranial-caudal direction and less than 1 mm in the transverse plane. All results were validated against the ground truth of manual delineations by an experienced radiation oncologist. The expected total time for the pretreatment setup analysis was less than 10 s. Conclusions: By combining the registration and machine learning, the proposed approach has the potential to improve the accuracy of pretreatment setup for patients with thoracic malignancy.

Chen Ting; Jabbour, Salma K.; Haffty, Bruce G.; Yue, Ning [Radiation Oncology Department, Cancer Institute of New Jersey, University of Medicine and Dentistry of New Jersey, 195 Little Albany Street, New Brunswick, New Jersey 08901 (United States); Qin Songbing [Department of Radiation Oncology, The First Affiliated Hospital of Soochow University, Suzhou 215006 (China)

2013-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Rovibrational dynamics of the strontium molecule in the A^1\\Sigma_u^+, c^3\\Pi_u, and a^3\\Sigma_u^+ manifold from state-of-the-art ab initio calculations  

E-Print Network (OSTI)

State-of-the-art ab initio techniques have been applied to compute the potential energy curves for the electronic states in the A^1\\Sigma_u^+, c^3\\Pi_u, and a^3\\Sigma_u^+ manifold of the strontium dimer, the spin-orbit and nonadiabatic coupling matrix elements between the states in the manifold, and the electric transition dipole moment from the ground X^1\\Sigma_g^+ to the nonrelativistic and relativistic states in the A+c+a manifold. The potential energy curves and transition moments were obtained with the linear response (equation of motion) coupled cluster method limited to single, double, and linear triple excitations for the potentials and limited to single and double excitations for the transition moments. The spin-orbit and nonadiabatic coupling matrix elements were computed with the multireference configuration interaction method limited to single and double excitations. Our results for the nonrelativistic and relativistic (spin-orbit coupled) potentials deviate substantially from recent ab initio cal...

Skomorowski, Wojciech; Koch, Christiane P; Moszynski, Robert

2012-01-01T23:59:59.000Z

162

Three lectures on global boundary conditions and the theory of self--adjoint extensions of the covariant Laplace--Beltrami and Dirac operators on Riemannian manifolds with boundary  

E-Print Network (OSTI)

In these three lectures we will discuss some fundamental aspects of the theory of self-adjoint extensions of the covariant Laplace-Beltrami and Dirac operators on compact Riemannian manifolds with smooth boundary emphasizing the relation with the theory of global boundary conditions. Self-adjoint extensions of symmetric operators, specially of the Laplace-Beltrami and Dirac operators, are fundamental in Quantum Physics as they determine either the energy of quantum systems and/or their unitary evolution. The well-known von Neumann's theory of self-adjoint extensions of symmetric operators is not always easily applicable to differential operators, while the description of extensions in terms of boundary conditions constitutes a more natural approach. Thus an effort is done in offering a description of self-adjoint extensions in terms of global boundary conditions showing how an important family of self-adjoint extensions for the Laplace-Beltrami and Dirac operators are easily describable in this way. Moreover boundary conditions play in most cases an significant physical role and give rise to important physical phenomena like the Casimir effect. The geometrical and topological structure of the space of global boundary conditions determining regular self-adjoint extensions for these fundamental differential operators is described. It is shown that there is a natural homology class dual of the Maslov class of the space. A new feature of the theory that is succinctly presented here is the relation between topology change on the system and the topology of the space of self-adjoint extensions of its Hamiltonian. Some examples will be commented and the one-dimensional case will be thoroughly discussed.

A. Ibort

2012-05-16T23:59:59.000Z

163

EQUALITY CONSTRAINTS, RIEMANNIAN MANIFOLDS AND ...  

E-Print Network (OSTI)

Jul 27, 2007 ... Direct search methods are typically designed to work in (a subset of) Rk. ..... where f,j is the partial derivative of f(y) in terms of xj, which is exactly (2.12). ...... enter into a small enough neighborhood Ux? ? N of x? at the point y...

2007-07-27T23:59:59.000Z

164

EINSTEIN MANIFOLDS WITH SKEW TORSION  

Science Journals Connector (OSTI)

......since M is Sasaki, d = 2F where F is the fundamental 2-form, that is, F(X, Y) = g...an underlying S1 -fibration, but it does not induce a contact structure (the...Generalized geometry--an introduction, Handbook of Pseudo-Riemannian Geometry and Supersymmetry......

Ilka Agricola; Ana Cristina Ferreira

2014-09-01T23:59:59.000Z

165

Image Processing with Manifold Models  

E-Print Network (OSTI)

to the following signals ensemble def. = {x f(x) = A(x) cos((x)) \\ ||A || Amax and || || max.} This model to = R+ ? R+ ? S1 . The projection of a patch p L2 ([-/2, /2]) on M can be carried over approximately] and defines the windowed Fourier 20 = {x f(x) = A(x) cos((x)) \\ ||A || Amax and || || max.} model of locally

Milanfar, Peyman

166

Finsler manifolds with general symmetries  

E-Print Network (OSTI)

In this paper, we study generalized symmetric Finsler spaces. We first study symmetry preserving diffeomorphisms, then we show that the group of symmetry preserving diffeomorphisms is a transitive Lie transformation group. Finally we give some existence theorems.

Latifi, Dariush

2012-01-01T23:59:59.000Z

167

Aeroacoustics of perforated drag plates for quiet transport aircraft  

E-Print Network (OSTI)

Historically aircraft noise is one of the principal environmental issues for aviation. Within this context, the Silent Aircraft Initiative was launched with the objective to achieve a step-change in noise reduction compared ...

Sakaliyski, Kiril Dimitrov

2005-01-01T23:59:59.000Z

168

Body Force Model for the Aerodynamics of Inclined Perforated Surfaces  

E-Print Network (OSTI)

the mean velocity field inside and in the wake of the flaps while the numerical analysis comprised direct this finding. The resulting velocity field is in good agreement with the experiments and with the direct used in geophysical and civil engineering applications as wind shelters [8]. Common to all

Papamoschou, Dimitri

169

Author's personal copy Perforated diode neutron detector modules fabricated from  

E-Print Network (OSTI)

and Nuclear Engineering, 3002 Rathbone Hall, Kansas State University, Manhattan, KS 66506-2503, USA b Department of Mechanical and Nuclear Engineering, 3002 Rathbone Hall, Kansas State University, Manhattan, KS:8398 MeV? ð93:7%? 7 3Lið1:7762 MeV? þ 4 2Heð1:0133 MeV? ð6:3%? 8 ion in the 94% branch

Shultis, J. Kenneth

170

The effects of plate thickness and perforation diameter on the supporting vapor velocity for a perforated plate fractionating column  

E-Print Network (OSTI)

by means of a Y/estphal balanoe ~ surface tensions by a Cence du 1'7ouy tensi- ometer (3), and liquid. viscositi by the use of modified Ostwald vis- cosity tubes. V SUPPORT AIIO RvCOV;=, RY VAPOR VZLDCITIRS Soon after the experimental colunn was put...

Cottle, John Ernest

1948-01-01T23:59:59.000Z

171

Some 6-dimensional Hamiltonian S1-manifolds  

Science Journals Connector (OSTI)

......that S1 must act with precisely four fixed points xk , 1 k 4, that have index...the identity near the singular points p lifts to a symplectomorphism of...S1 action near the singular point p2 in Z that lifts to an action near C0 that fixes......

Dusa McDuff

2009-01-01T23:59:59.000Z

172

Modular manifold for integrated fluidics and electronics  

DOE Patents (OSTI)

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.

Adkins, Douglas Ray (Albuquerque, NM)

2010-03-30T23:59:59.000Z

173

INTRODUCTION TO MANIFOLDS --II Tangent Bundles  

E-Print Network (OSTI)

to the arithmetic space Rn . Solution. Fix any chart x around the point p and consider the maps iso, iso defined as iso: Rn C (R, M), v = (v1, . . . , vn) v(·), v(t) = x-1 (x(p) + tv) (2) iso(v) = [iso(v)]p. (3-coordinate representation, x((t)) = x(p) + tv + · · · , existing by virtue of differentiability of the latter. Then iso

Yakovenko, Sergei

174

Manifold homotopy via the flow complex  

Science Journals Connector (OSTI)

It is known that the critical points of the distance function induced by a dense sample P of a submanifold ? of ?n are distributed into two groups, one lying close to ? itself, called the shallow, and the other close ...

Bardia Sadri

2009-07-01T23:59:59.000Z

175

On Modelling and Understanding Image Manifolds .  

E-Print Network (OSTI)

??Images of objects (e.g. a rotating teapot, views from a camera mounted on a robot, an actor illuminated from different positions on a hemisphere, etc.) (more)

Woodland, Alan

2010-01-01T23:59:59.000Z

176

A combination theorem for convex hyperbolic manifolds, with applications to surfaces in 3-manifolds  

Science Journals Connector (OSTI)

......It follows that a lift of the path to ~Y does...start and end at the same point. Hence is not contractible...the convex hull of the four points a1, a2, b1, b2, there...identification given by the lift, C ~C, the point x determines a basepoint......

Mark Baker; Daryl Cooper

2008-07-01T23:59:59.000Z

177

E-Print Network 3.0 - artery perforator sparing Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

Methods to evaluate clinical interventions in cultured porcine coronary arteries 12;CIP... interventions in cultured porcine coronary arteries by Leonarda H. van den Heuvel....

178

Characteristics of countercurrent vapor-liquid flow at a perforated plate  

E-Print Network (OSTI)

of heat-sens1tive materials. Also, a column with low liqu1d holdup is more responsive to operating controls than 1s a column conta1n- 1ng a large inventory of liquid. It was found that for the plates having hole areas of 23 and 40 per cent... to the plate above by the impetus of the vapor Jetting through the liquid on the plate. In this case, the velocity of the vapor through the holes in the plate, (or slots, in the case of bubble-caps) would be the 38 controlling factor. This mechanism...

Sutherland, Samuel Shelton

2012-06-07T23:59:59.000Z

179

Laboratory investigations of low frequency sound attenuation over combustion flat perforated wall sheet  

E-Print Network (OSTI)

sheet Q. Qina , P. Rubinia , C. Jayatungab and V. Sandersonb a The University of Hull, The Acoustics Turbomachinery Ltd, PO Box 1, Waterside South, LN5 7FD Lincoln, UK q.qin@hull.ac.uk Proceedings of the Acoustics in turbine combustors for many years. The main purpose of the holes on the combustion chambers is to cool

Boyer, Edmond

180

A Study on the Analysis of the Formation of High Water Saturation zones around Well perforations.  

E-Print Network (OSTI)

??The water produced with oil as a result of water coning is a serious problem as it decreases well productivity and increases the cost of (more)

Alrumah, Muhammad

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

E-Print Network 3.0 - abdominal wall perforators Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

fluid-structure interaction in Summary: of fluid-structure interaction in abdominal aor- tic aneurysms: initial wall stress effects 25 3... Computational modelling of...

182

Special Perforated Steel Plate Shear Walls with Reduced Beam Section Anchor Beams. II: Analysis and  

E-Print Network (OSTI)

; Seismic design. Introduction Steel plate shear walls are a single or multistory lateral force resisting, or "fish plate," used in the experiments to connect the infill panel with the sur- rounding frame

Bruneau, Michel

183

E-Print Network 3.0 - anterolateral thigh perforator Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

OF PRISTIMANTIS (ANURA: STRABOMANTIDAE) FROM THE PACIFIC COAST OF THE DARIEN PROVINCE, PANAMA, Summary: arrow indicating the enlarged heel tubercle on the right leg. (B) Dorsum and...

184

Direct visualization of the perforant pathway in the human brain with ex vivo diffusion tensor imaging  

E-Print Network (OSTI)

Ex vivo magnetic resonance imaging yields high resolution images that reveal detailed cerebral anatomy and explicit cytoarchitecture in the cerebral cortex, subcortical structures, and white matter in the human brain. Our ...

Augustinack, Jean C.

185

Design and performance considerations for perforated semiconductor thermal-neutron detectors  

E-Print Network (OSTI)

. The ðn; g? reactions yield numerous low energy conversion electrons, with a general distribution ranging]. As a result, the reaction products from Gd are mostly low energy conversion electrons which can easily.K. Shultis, D.S. McGregor ? S.M.A.R.T. Laboratory, Department of Mechanical and Nuclear Engineering, 3002

Shultis, J. Kenneth

186

Head Loss Through Fibrous Debris Bed with Different Types of Perforated Strainers  

E-Print Network (OSTI)

Loss of Coolant Accident LWR Light Water Reactor MBLOCA Medium Break Loss of Coolant Accident MSDS Material Safety Data Sheet NEI Nuclear Energy Institute NIST National Institute of Standards and Technology NPP Nuclear Power Plants NPSH Net... than the randomly generated debris bed on the sump strainer of the NPP. The U.S. NRC began their analysis in 1996 in order to predict and estimate the loss of the Net Positive Suction Head (NPSH) by establishing GSI-191. In 1995, NUREG/CR-6224...

Abdulsattar, Suhaeb S

2014-05-03T23:59:59.000Z

187

The diversity of symplectic CalabiYau 6-manifolds  

Science Journals Connector (OSTI)

......map to the orbifold points of H4 / under Z/ H4...the orbifold group of a point p H4 /, then the fibre...one should remember that points in the fibre over p may...H4 / has two disjoint lifts to Z/, distinguished...given in [14] of the four-dimensional hyperbolic......

Joel Fine; Dmitri Panov

2013-09-01T23:59:59.000Z

188

Do Uniruled Six-manifolds Contain Sol Lagrangian Submanifolds?  

Science Journals Connector (OSTI)

......to pass through a point (resp. to have fixed...class p k ) requires four degrees of freedom...curves have a marked point in b and denotes the...map, then this map lifts as such that the following...if necessary, the point yV can be chosen to...on . Likewise, the lift of yV can be chosen......

Frdric Mangolte; Jean-Yves Welschinger

2012-01-01T23:59:59.000Z

189

Stochastic analysis on sub-Riemannian manifolds with transverse ...  

E-Print Network (OSTI)

May 1, 2014 ... The Laplace-Beltrami operator L is the generator of the Dirichlet form. E(f ) = ?. M ... on M with generator 1. 2. L. .... linear equation. dMt dt. = ?.

Fabrice Baudoin

2014-04-30T23:59:59.000Z

190

Consistency conditions for orientifolds and D-manifolds  

Science Journals Connector (OSTI)

We study superstrings with orientifold projections and with generalized open string boundary conditions (D branes). We find two types of consistency condition, one related to the algebra of Chan-Paton factors and the other to cancellation of divergences. One consequence is that the Dirichlet five branes of the type I theory carry a symplectic gauge group, as required by string duality. As another application we study the type I theory on a K3 Z2 orbifold, finding a family of consistent theories with various unitary and symplectic subgroups of U(16)U(16). We argue that the K3 orbifold with spin connection embedded in gauge connection corresponds to an interacting conformal field theory in the type I theory.

Eric G. Gimon and Joseph Polchinski

1996-07-15T23:59:59.000Z

191

Quantized Nambu-Poisson manifolds and n-Lie algebras  

SciTech Connect

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.

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

192

New Statistical Bound for Inference Problems on Riemannian Manifolds  

E-Print Network (OSTI)

Barroso Instituto Sistemas e Rob´otica (ISR), Instituto Superior T´ecnico (IST) Lisbon, Portugal #12

193

An implicit trust-region method on Riemannian manifolds  

E-Print Network (OSTI)

Jun 6, 2007 ... ship is easily determined, requiring only a norm calculation. ..... Note that the model Hessian HY has been left unspecified, as its effect on mY ,...

2007-06-06T23:59:59.000Z

194

A Connection for Product Manifolds in Noncommutative Geometry  

Science Journals Connector (OSTI)

......4):351-9. 13 Dubois-Violette M. , Masson T. On the first-order...one hand, Joachim Cuntz and Daniel Quillen, in their seminal...463546. [11] Dubois-Violette, M. "Lectures on graded...Geometry 25 [12] Dubois-Violette, M., J. Madore, T. Masson......

Javier Lpez Pea

2008-01-01T23:59:59.000Z

195

Width complexes for knots and 3-manifolds Jennifer Schultens  

E-Print Network (OSTI)

. If all minima of h|K occur below all maxima of h|K, then we say that K is in bridge position with respect to h. The index is the number of maxima (minima). The bridge number of K, b(K), is the minimal number of maxima required for h|K. If K is in bridge position, then a regular level surface below all maxima

Schultens, Jennifer

196

ON THE UNIFORM EQUIDISTRIBUTION OF CLOSED HOROSPHERES IN HYPERBOLIC MANIFOLDS  

E-Print Network (OSTI)

to the hyperbolic area measure. Investigations related to this fact have been carried out by a number Date: March 17, 2011. 1 #12;2 ANDERS S¨ODERGREN of people over the years, including Selberg (unpublished), Zagier [35

197

Lefschetz properties for arithmetic real and complex hyperbolic manifolds  

Science Journals Connector (OSTI)

......172, 1371. [2] N. Bergeron, Cycles g eod esiques dans les vari et es hyperboliques...Asymptotique de la norme L2 d'un cycle g eod esique dans les rev^etements de congru...1, 101125 (French). [4] , Cycles g eod esiques transverses dans les vari et es......

N. Bergeron

2003-01-01T23:59:59.000Z

198

Three-dimensional routed manifolds with externally inserted cables  

E-Print Network (OSTI)

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 ...

Breinlinger, Keith J. (Keith Joseph), 1974-

2003-01-01T23:59:59.000Z

199

Center Manifold Analysis of Delayed Lienard Equation and Its Applications  

E-Print Network (OSTI)

];Rn), then for any t 2 [t0;t0 + d], let xt 2 C be deflned by xt( ) = x(t+ );?? 6 6 0. The following relation _x = f(t;xt); (2.1) is called functional difierential equation. Equations of this type are very general and it includes delay difierential equation (DDE). A... function x is said to be a solution of (2.1) if there exists t0 2 R;d > 0 5 such that x 2 C([t0 ? ?;t0 + A];Rn) and x satisfles (2.1) for t 2 (t0;t0 + d). In this case x is deflned as a solution of (2.1) on [t0 ? ?;t0 + d) with initial condition x(t0...

Zhao, Siming

2010-01-14T23:59:59.000Z

200

Optimal Nash's inequalities on Riemannian manifolds: the influence of geometry  

Science Journals Connector (OSTI)

......definition, we say that H2 1(M) is an admissible function for (E) if there exists some C2 0 real such that everywhere on M, || C2u. Let g be the Laplacian with respect to g (with the minus sign convention). Then, as one easily checks, u is a solution......

Olivier Druet; Emmanuel Hebey; Michel Vaugon

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Symmetric invariant manifolds in the Fermi-Pasta-Ulam lattice  

E-Print Network (OSTI)

which represent the material elements of the string. Each of the point masses is an oscillator Introduction The Fermi-Pasta-Ulam (FPU) lattice is a discrete model for a continuous nonlinear string, introduced by E. Fermi, J. Pasta and S. Ulam [7]. This string is modeled by a finite number of point masses

Rink, Bob

202

An hourly-based performance comparison of an integrated micro-structural perforated shading screen with standard shading systems  

E-Print Network (OSTI)

Efficiency and Renewable Energy, Building TechnologiesEfficiency and Renewable Energy, Buildings Energy Databook,

Appelfeld, David

2013-01-01T23:59:59.000Z

203

Ris Report No. 372 5 Ris National Laboratory  

E-Print Network (OSTI)

generation in nuclear boiling water reactors is limited by a thermohydraulic phenomenon called burnout. When and Annuli at 30 to 90 bar by Jørgen Wurtz Risø National Laboratory Department of Reactor Technology Abstract

204

Riso Report No. 372 5 Riso National Laboratory  

E-Print Network (OSTI)

generation in nuclear boiling water reactors is limited by a thermohydraulic phenomenon called burnout. When and Annuli at 30 to 90 bar by J0rgen Wiirtz Ris0 National Laboratory Department of Reactor Technology

205

INVARIANT MANIFOLDS, DISCRETE MECHANICS, AND TRAJECTORY DESIGN FOR A MISSION TO TITAN  

E-Print Network (OSTI)

denser than that of any other moon in the solar system, Saturn's largest moon Titan is a treasure trove Systems, California Institute of Technology, MC 107-81, Pasadena, California 91125, USA. E-mail: egawlik@caltech.edu. Control and Dynamical Systems, California Institute of Technology, MC 107-81, Pasadena, California 91125

Marsden, Jerrold

206

Hyperbolic volume of representations of fundamental groups of cusped 3-manifolds  

Science Journals Connector (OSTI)

......obtained by adding to M one point for each lift of each cusp of M. We call...tetrahedron of and one of its lifts. The vertices of are ideal points, so their images under...so the vertices of i are four distinct points. The last assertion follows......

Stefano Francaviglia

2004-01-01T23:59:59.000Z

207

TWISTORIAL HARMONIC MORPHISMS WITH ONE-DIMENSIONAL FIBRES ON SELF-DUAL FOUR-MANIFOLDS  

Science Journals Connector (OSTI)

......the set of regular points of a non-constant...propositions give two of the four types of harmonic...as above, to the four-dimensional self-dual...surfaces through a given point. The fact that the...interpret the twistor lift of Eells and Salamon...dimensions two and four, respectively, endowed......

RADU PANTILIE; JOHN C. WOOD

2006-03-01T23:59:59.000Z

208

Mostow's Decomposition Theorem for L*-groups and Applications to affine coadjoint orbits and stable manifolds  

E-Print Network (OSTI)

Mostow's Decomposition Theorem is a refinement of the polar decomposition. It states the following. Let G be a compact connected semi-simple Lie group with Lie algebra g. Given a subspace h of g such that [X, [X, Y

A. B. Tumpach

2006-05-11T23:59:59.000Z

209

Weighted local and global regressive mapping: A new manifold learning method for machine fault classification  

Science Journals Connector (OSTI)

This article studies if machine faults can be effectively determined in a reduced dimensional space. When faults occur in machines, machine vibration signals will deviate from its normal signal pattern. Such changes can be reflected in the features constructed ... Keywords: Fault classification, Feature extraction, Unsupervised learning, Vibrations

Xiaohang Jin, Fang Yuan, Tommy W. S. Chow, Mingbo Zhao

2014-04-01T23:59:59.000Z

210

Approximation Order Equivalence Properties of Manifold-Valued Data Subdivision Schemes  

E-Print Network (OSTI)

, is there an approximation operator Ah = Ah;r,R that maps samples of any f : R M on a grid of size h to an approximant fh on Curves and Surfaces (Avignon, France, June 29-July 5, 2006.) and further discussed in a mini, is there an approximation operator Ah = Ah;r,R that maps samples of any f : R M on a grid of size h to an approximant fh

Yu, Thomas P.-Y.

211

Discrete time robust control systems under structured perturbations: stability manifolds and extremal properties  

E-Print Network (OSTI)

of the multilinearly pararnetrized family of polynomials P(z) Ql (z)P11(z) ' ' ' Pity (z) + + Qm(z)Pml (z) ' ' ' Pmr (z) where the Qi(z) are fixed and the P?(z), i = 1, . . . , nz, j = l, r; are interval real or complex polynomials. We showed that there exists a...&i&l&I&' 50 0& FIGURE Page 19 Evolution of the image set of the segment in Example 11, for At ? 0. 3951 68 20 21 Stability regions along t. he segment in Example 11 Plot of C(0) in Example 12 70 74 22 Image set at z=l of a complex segment...

Tin, Marie-Lyne Appoline

1992-01-01T23:59:59.000Z

212

Disorder driven roughening transitions of elastic manifolds and periodic elastic media  

Science Journals Connector (OSTI)

The simultaneous effect of both disorder and crystal-lattice pinning on the equilibrium behavior of oriented elastic objects is studied using scaling arguments and a functional renormalization group technique....

T. Emig; T. Nattermann

1999-04-01T23:59:59.000Z

213

A proof of Price's Law on Schwarzschild black hole manifolds for all angular momenta  

E-Print Network (OSTI)

Price's Law states that linear perturbations of a Schwarzschild black hole fall off as $t^{-2\\ell-3}$ for $t \\to \\infty$ provided the initial data decay sufficiently fast at spatial infinity. Moreover, if the perturbations are initially static (i.e., their time derivative is zero), then the decay is predicted to be $t^{-2\\ell-4}$. We give a proof of $t^{-2\\ell-2}$ decay for general data in the form of weighted $L^1$ to $L^\\infty$ bounds for solutions of the Regge--Wheeler equation. For initially static perturbations we obtain $t^{-2\\ell-3}$. The proof is based on an integral representation of the solution which follows from self--adjoint spectral theory. We apply two different perturbative arguments in order to construct the corresponding spectral measure and the decay bounds are obtained by appropriate oscillatory integral estimates.

Roland Donninger; Wilhelm Schlag; Avy Soffer

2009-08-28T23:59:59.000Z

214

Analysis of the rigid porous manifold as an effevtive device to stratify solar thermal storage tanks.  

E-Print Network (OSTI)

??One of the most effective and simplest methods to maintain thermal stratification of solar hot water storage tanks during charge and discharge is the use (more)

Ghosh, Vivekananda

2011-01-01T23:59:59.000Z

215

Insulated pipelines between the underwater Manifold Centre and Cormorant a platform in the northern North Sea  

SciTech Connect

Oil flows from the UMC to the Cormorant 'A' platform through a system of subsea pipelines. Therefore, oil from the wells must travel a considerable distance, up to ten kilometres, before reaching processing facilities on the platform. During this trip the oil could cool to the ambient seawater temperature of 5/sup 0/C. Studies have shown that the acceptance of crude oil at such a low temperature could cause unacceptable emulsion, hydrate, and wax deposition problems. To overcome these problems, a unique insulated pipeline was engineered to keep the crude oil temperature above 40/sup 0/C during production and above 13/sup 0/C for well testing. This paper describes efforts required to identify the problem and engineer a solution. The resultant pipeline incorporated an insulated pipe-withina-pipe bundle that was installed by a mid-depth tow method.

Costello, G.J.; Brink, F.I.A.; Henry, D.

1983-05-01T23:59:59.000Z

216

DISTRIBUTIONAL LIMITS OF RIEMANNIAN MANIFOLDS AND GRAPHS WITH SUBLINEAR GENUS GROWTH  

E-Print Network (OSTI)

-quasi-conformal homeomorphism f : M M. Suppose that (Mi) is a sequence in Q(M, K) and let H be the space of all isometry the Lebesgue measure volMi on Mi induced by the Riemannian metric, and let Mi be the push-forward of the probability measure 1 volMi (Mi) volMi by the continuous map Mi : Mi H, Mi (p) = (Mi, p). It follows from our

Souto, Juan

217

Motion Planning and Trajectory Tracking on 2-D Manifolds embedded in 3-D Workspaces  

E-Print Network (OSTI)

to the case of autonomous robotic surface painting, cleaning, inspection, etc. The main difficulties we present a methodology that drives and stabilizes a robotic agent moving in a three dimen- sional-zones. I. INTRODUCTION One of the main tasks of neuro-robotics is to make a robot execute a task

Loizou, Savvas G.

218

Instanton calculus and SUSY gauge theories on asymptotically locally Euclidean manifolds  

Science Journals Connector (OSTI)

We study instanton effects along the Coulomb branch of an N=2 supersymmetric Yang-Mills theory with gauge group SU(2) on asymptotically locally Euclidean spaces. We focus our attention on an Eguchi-Hanson gravitational background and on gauge field configurations of the lowest Chern class.

Diego Bellisai and Gabriele Travaglini

1998-06-15T23:59:59.000Z

219

Reduction of fuel consumption in gasoline engines by introducing HHO gas into intake manifold  

Science Journals Connector (OSTI)

Browns gas (HHO) has recently been introduced to the auto industry as a new source of energy. The present work proposes the design of a new device attached to the engine to integrate an HHO production system with the gasoline engine. The proposed HHO generating device is compact and can be installed in the engine compartment. This auxiliary device was designed, constructed, integrated and tested on a gasoline engine. Test experiments were conducted on a 197cc (Honda G 200) single-cylinder engine. The outcome shows that the optimal surface area of an electrolyte needed to generate sufficient amount of HHO is twenty times that of the piston surface area. Also, the volume of water needed in the cell is about one and half times that of the engine capacity. Eventually, the goals of the integration are: a 2030% reduction in fuel consumption, lower exhaust temperature, and consequently a reduction in pollution.

Ammar A. Al-Rousan

2010-01-01T23:59:59.000Z

220

E-Print Network 3.0 - audio localization manifold Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

recognition systems that use visual together with audio information showed... to acous- tic noise perturbation. The audio-visual speech recognition sys- tem presented in this...

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Unconstrained optimizers for ICA learning on oblique manifold using Parzen density estimation  

E-Print Network (OSTI)

constraint. Essentially, im- posing the normality constraint implicitly, in line with the ICA definition, a design of the steepest descent (SD), conjugate gradient (CG) with Hager-Zhang (HZ) or a hybrid update on the one hand the computa- tional overhead can be tolerated and on the other hand the solution quality

Aluffi, Paolo

222

INTEGRAL GEOMETRY OF TENSOR FIELDS ON A CLASS OF NON-SIMPLE RIEMANNIAN MANIFOLDS  

E-Print Network (OSTI)

on it. We can always assume that .M; @M / is equipped with a real analytic atlas, while @M and g may we want to trace the dependence of I on perturbations of the metric, it is more convenient to work

Stefanov, Plamen

223

Brain Differences Visualized in the Blind using Tensor Manifold Statistics and Diffusion Tensor Imaging  

E-Print Network (OSTI)

, an overall scalar-valued diffusion measure, such as the trace or mean diffusivity can adequately describe of many subjects are aligned to the same standard template or atlas, maps of the deformation gradients (Jacobians) can be computed in the atlas coordinate system and group statistics can be computed at each voxel

Thompson, Paul

224

INTEGRAL GEOMETRY OF TENSOR FIELDS ON A CLASS OF NON-SIMPLE RIEMANNIAN MANIFOLDS  

E-Print Network (OSTI)

assume that .M; @M / is equipped with a real analytic atlas, while @M and g may or may not be analytic is the linearization of those problems for an appropriate . Since we want to trace the dependence of I on perturbations

Uhlmann, Gunther

225

ccsd-00000526(version2):26Feb2004 WONG-ROSAY THEOREM IN ALMOST COMPLEX MANIFOLDS  

E-Print Network (OSTI)

such that lim r -r C2( ¯U) = 0, · for every , f is a diffeomorphism from D to G M with G U = {x U : r(x) SUKHOV Theorem 1. Assume that lim J - J C2( ¯U) = 0. If there is a point x0 D such that lim f (x0 ) = p

Boyer, Edmond

226

A GENERALIZED ARRAY MANIFOLD MODEL FOR LOGAL SCATTERING IN WIRELESS COMMUNICATIONS  

E-Print Network (OSTI)

, S-100 44 Stockholm, Sweden 'Dept. of Elec. & Comp. Engineering, Brigham Young University, Provo, UT the conventional plane wave model. 1. INTRODUCTION The use of antenna arrays as a tool for improving coverage reduce radiated power require- ments, allow for multiple mobile co-channel users, and re- duce signal

Swindlehurst, A. Lee

227

Physica D 189 (2004) 7080 Global manifold control in a driven laser: sustaining  

E-Print Network (OSTI)

of a mitigating unstable periodic orbit created in the presence of the multi-frequency drive. The mitigating experimental and numerical evidence of a multi-frequency phase control able to preserve periodic behavior variable was used to maintain chaos by re-injecting the dynamics into a region containing a chaotic saddle

Billings, Lora

228

Applications of Low Dimensional Manifolds: 1. Resolved Viscous Detonations with Detailed H2/O2 Kinetics,  

E-Print Network (OSTI)

.5 3 3.5 4 x 10 -3 t (ms) [N2 ](mole/cc) 10 -10 10 -5 10 0 0.95 1 1.05 1.1 1.15 x 10 -3 t (ms) [CO2 Alamos National Laboratory Los Alamos, New Mexico 6 October 1999 #12;Acknowledgments Prof. Samuel, · Constant pressure · Diffusive mass, momentum, and energy transport · fastest time scales 10-16 s

229

MKPLS: Manifold Kernel Partial Least Squares for Lipreading and Speaker Identification  

E-Print Network (OSTI)

inefficient. On the other hand, the NIPALS algorithm [26] is an iterative robust procedure for solving eigen-values, speaker dependent, and speaker semi-dependent. Our ap- proach outperforms for the speaker semi- pendent, speaker dependent, and speaker semi-dependent. In both databases, our approach outperforms

Elgammal, Ahmed

230

World Journal of Emergency Surgery BioMed Central  

E-Print Network (OSTI)

Intrathoracic drainage of a perforated prepyloric gastric ulcer with a type II paraoesophageal hernia

Robert A Pol; Hiske W Wiersma; Bas Jgl Zonneveld

2008-01-01T23:59:59.000Z

231

Application of a modified manifold-based exponentially convergent algorithm to solve elliptic boundary-value problems  

Science Journals Connector (OSTI)

......given by := [-a0, a0] [-b0, b0] such that a0 and b0 can cover the maximum length of the problem domain along the x-axis and...ex cos y + 10, (x, y) . (3.16) The parameters are set to m = 20, bn = 160, = 10, u0 = 0.5, = 10-5 and t = 0......

Yung-Wei Chen; Chun-Ming Chang; Chein-Shan Liu; Jiang-Ren Chang

2014-01-01T23:59:59.000Z

232

Homogeneous Einstein Metrics on SU(n) Manifolds, Hoop Conjecture for Black Rings, and Ergoregions in Magnetised Black Hole Spacetimes  

E-Print Network (OSTI)

of analytical and numerical techniques are employed to that end. It is known that every compact simple Lie Group admits a bi-invariant homogeneous Einstein metric. We use two ansatze to probe the existence of additional inequivalent Einstein metrics on the Lie...

Mujtaba, Abid Hasan

2013-01-09T23:59:59.000Z

233

hal-00787849,version1-13Feb2013 ter manifold theory, the former one occurs on a three-  

E-Print Network (OSTI)

, the method is proposed for an autonomous system, in a systematic version, in principle able to be carried out, and in Sect. 6 some conclusions are drawn. 2 The model A paradigmatic autonomous system is considered (see Fig systems falling in this class are structures under wind flow, causing Hopf bifurcation, and dead loads

Paris-Sud XI, Université de

234

Application of /sup 252/Cf-source driven noise analysis measurements for subcriticality of HFIR fuel elements  

SciTech Connect

The approach-to-critical measurements reported were for a plate-type fuel element where the height of the water moderator and side and top reflector were increased. Measurements were also performed with each of the two annuli of the fuel element to verify both the presence of boron in the fuel plates and the proper uranium loading prior to assembly of the two annuli for full submersion measurements. Measurements were also performed with detectors external to the reflector (> 15 cm of water on top, bottom, and side) for the assembled, submerged HFIR fuel element.

King, W.T.; Mihalczo, J.T.

1983-01-01T23:59:59.000Z

235

AbstractThe red snapper (Lutjanus campechanus) is currently under rig  

E-Print Network (OSTI)

653 Abstract­The red snapper (Lutjanus campechanus) is currently under rig orous federal and state of annuli in otolith thin sections have been used to age many species of fish, including red snapper. However, the utility of this method for aging red snapper has been questioned by those who dispute both

236

AN EXPLICIT BOUND FOR UNIFORM PERFECTNESS OF THE JULIA SETS OF RATIONAL MAPS  

E-Print Network (OSTI)

Abstract. A compact set C in the Riemann sphere is called uniformly perfect if the moduli of annuli of the Julia sets. We also give a concrete bound for the family of quadratic polynomials fcz = z 2 + c in terms , and afterwards by many authors see 15 and its references. By de nition, the sets with some kind of self

Sugawa, Toshiyuki

237
238

Symbolic use of marine shells and mineral pigments by Iberian Neandertals  

Science Journals Connector (OSTI)

...perforation-associated use wear evidence. Shallow notches...prevent assessment of use wear. The origin of perforation...that naturally perforated marine shells were extensively...behavior can explain inland marine shell accumulations...However, neither use wear nor any kind...

Joo Zilho; Diego E. Angelucci; Ernestina Badal-Garca; Francesco dErrico; Floral Daniel; Laure Dayet; Katerina Douka; Thomas F. G. Higham; Mara Jos Martnez-Snchez; Ricardo Montes-Bernrdez; Sonia Murcia-Mascars; Carmen Prez-Sirvent; Clodoaldo Roldn-Garca; Marian Vanhaeren; Valentn Villaverde; Rachel Wood; Josefina Zapata

2010-01-01T23:59:59.000Z

239

Prabhakar R. Pagilla* Associate Professor  

E-Print Network (OSTI)

/perforating pro- cesses, the print perforation gets skewed. Further, excessive ten- sion variations may cause section, a process section, and an exit section. The entry section consists of an unwind stand, a tension in the process section in the case of aluminum and steel webs, and printing, perforating, and laminating

Pagilla, Prabhakar R.

240

Green Functions For Wave Propagation on a 5D manifold and the Associated Gauge Fields Generated by a Uniformly Moving Point Source  

E-Print Network (OSTI)

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.

I. Aharonovich; L. P. Horwitz

2006-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Hyperkaehler structures and infinite-dimensional Grassmannians  

E-Print Network (OSTI)

In this paper, we describe an example of a hyperkaehler quotient of a Banach manifold by a Banach Lie group. Although the initial manifold is not diffeomorphic to a Hilbert manifold (not even to a manifold modelled on a reflexive Banach space), the quotient space obtained is a Hilbert manifold, which can furthermore be identified either with the cotangent space of a connected component of the restricted Grassmannian or with a natural complexification of this connected component, thus proving that these two manifolds are isomorphic hyperkaehler manifolds. In addition, Kaehler potentials are computed using Kostant-Souriau's theory of prequantization.

A. B. Tumpach

2005-11-17T23:59:59.000Z

242

Estimation of vertical permeability from production data of wells in bottom water drive reservoirs  

E-Print Network (OSTI)

in Vertical Permeability Introduced by Erroneous Horizontal Permeabilty on Future performance of a Mell 13 39 43 43 10 Effect of Production From Test Perforation on Future Performance of a Well (Kh/Kv 1) . . . . . . . . . . . 57 Effect of Production... between perforations and the WOC, Kh/Kv = I . . . . . . . . . . . . . . . . . . . . . . . 17 Effect of cell break-up on producing WOR performance for 9 ft interval between perforations and the WOC, Kh/Kv 30 . l8 Effect of cell break-up on cumulative...

Tirek, Ali

1982-01-01T23:59:59.000Z

243

DOE Zero Energy Ready Home Case Study 2014: Durable Energy Builders...  

Energy Savers (EERE)

The system combines several technologies. The gutters were lined with perforated plastic tubes that keep out leaves and debris, while collecting rain from 75% of the roof and...

244

E-Print Network 3.0 - aqueous perchlorate media Sample Search...  

NLE Websites -- All DOE Office Websites (Extended Search)

on Remediation of Chlorinated and Recalcitrant Compounds (Monterey, Summary: media were held down by the perforated plate and were not fluidized. Perchlorate, acetic acid,...

245

E-Print Network 3.0 - assist large sequencing Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

assistance can improve searching perfor- mance. However, the improvement Source: Jansen, James - College of Information Sciences and Technology, Pennsylvania State University...

246

Dynamic State Alteration Techniques for Automatically Locating Software Errors  

E-Print Network (OSTI)

on High Perfor- mance Computer Architecture, pages 121132,on High- Performance Computer Architecture, pages 243247,Symposium on Computer Architecture, pages 284295, June

Jeffrey, Dennis

2009-01-01T23:59:59.000Z

247

Compact Modeling and Analysis for Electronic and Thermal Effects of Nanometer Integrated and Packaged Systems  

E-Print Network (OSTI)

Int. Symp. on Computer Architecture ( ISCA), pages 314324,Proc. Int. Symp. on Computer Architecture (ISCA), pages 83High Perfor- mance Computer Architecture (HPCA), pages 15

WANG, HAI

2012-01-01T23:59:59.000Z

248

E-Print Network 3.0 - abscess gas formation Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

if there is evidence of intestinal obstruction, abscess formation, perforation, fis... -old white woman with a history of gas- trointestinal problems presented with ab-...

249

E-Print Network 3.0 - advanced electrocardiographic predictors...  

NLE Websites -- All DOE Office Websites (Extended Search)

and Information Sciences 7 We introduce Branch Predictor Prediction (BPP) as a power-aware branch prediction technique for high perfor- Summary: ABSTRACT We introduce...

250

ENERGY & ENVIRONMENT DIVISION. ANNUAL REPORT FY 1980  

E-Print Network (OSTI)

active solar methodology, BNL boiler and furnace perfor-furnaces. Component Based Systems (CBS) A major addition to the program is an active solar

Authors, Various

2010-01-01T23:59:59.000Z

251

Microsoft Word - May_2008_BM26-42_Data_Rpt.doc  

Office of Legacy Management (LM)

subsurface elevation is at the midpoint of the perforation interval. Link to Colorado Oil and Gas Conservation Commission information about well BM 26-42 http:...

252

Data Report  

Office of Legacy Management (LM)

subsurface elevation is at the midpoint of the perforation interval. Link to Colorado Oil and Gas Conservation Commission information about well BM 35-21D http:...

253

Co-simulation of innovative integrated HVAC systems in buildings  

E-Print Network (OSTI)

Canada: International Building Perfor- mance SimulationExternal coupling between building energy simulation andexternal coupling of building energy and air ow modeling

Trcka, Marija

2010-01-01T23:59:59.000Z

254

Power module assemblies with staggered coolant channels  

DOE Patents (OSTI)

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.

Herron, Nicholas Hayden; Mann, Brooks S; Korich, Mark D

2013-07-16T23:59:59.000Z

255

Generalized Time Warping for Multi-modal Alignment of Human Motion  

E-Print Network (OSTI)

[7] proposed dynamic manifold warp- ing (DMW) that extends CTW to incorporate more complex spatial transformations through manifold learning. How- ever, CTW and DMW have three main limitations due to reliance

De la Torre, Fernando

256

High Specific Power, Direct Methanol Fuel Cell Stack  

NLE Websites -- All DOE Office Websites (Extended Search)

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...

257

Featured Photo  

NLE Websites -- All DOE Office Websites (Extended Search)

First | Prev | 1 1 | Next | Last Back to Index Gas for NIF Targets A NIF Cryogenic System technician takes measurements in the target positioner gas manifold. The gas manifold is...

258

Finite element analysis of laminar mixed convection in the entrance region of horizontal annular ducts  

SciTech Connect

The laminar mixed convection in the entrance region of horizontal straight ducts of an annular cross section is studied by means of a generally applicable finite element procedure based on the parabolized simplification of the Navier-Stokes and energy equations and on the Boussinesq approximation of the buoyancy term. The procedure is validated through comparisons of computed results with available data from the literature. New results concern annuli with radius ratios equal to 0.25, 0.5, and 0.75 subjected to the fundamental boundary condition of the second and the third kinds, for Prandtl numbers equal to 0.7 and 7, and different values of Grashof number.

Nonino, C.; Giudice, S. del [Univ. di Udine (Italy). Dipt. di Energetica e Macchine

1996-02-23T23:59:59.000Z

259

International contributions to IAEA-NEA heat transfer databases for supercritical fluids  

SciTech Connect

An IAEA Coordinated Research Project on 'Heat Transfer Behaviour and Thermohydraulics Code Testing for SCWRs' is being conducted to facilitate collaboration and interaction among participants from 15 organizations. While the project covers several key technology areas relevant to the development of SCWR concepts, it focuses mainly on the heat transfer aspect, which has been identified as the most challenging. Through the collaborating effort, large heat-transfer databases have been compiled for supercritical water and surrogate fluids in tubes, annuli, and bundle subassemblies of various orientations over a wide range of flow conditions. Assessments of several supercritical heat-transfer correlations were performed using the complied databases. The assessment results are presented. (authors)

Leung, L. K. H. [Atomic Energy of Canada Limited, Chalk River Laboratories, Chalk River, ON K0J 1J0 (Canada); Yamada, K. [International Atomic Energy Agency, Vienna International Centre, P.O. Box 100, 1400 Vienna (Austria)

2012-07-01T23:59:59.000Z

260

Weir manufactures locally to serve Australian fracking market  

Science Journals Connector (OSTI)

Weir Oil & Gas has established a manifold trailer manufacturing capability in Australia to serve the country's growing fracking market.

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

The Cotton tensor and the Ricci flow  

E-Print Network (OSTI)

We compute the evolution equation of the Cotton tensor under the Ricci flow of a three dimensional Riemannian manifold.

Mantegazza, Carlo

2012-01-01T23:59:59.000Z

262

hf. J. Heat Mars Transfer. Vol. 40, No. 17.pp. 42W4218, 1997 f$ 1997Elsevier Science Ltd. All rights resmed  

E-Print Network (OSTI)

engineering appli- cations, e.g. in ducts, manifolds and Stirling engines. t Author to whom correspondence

Guo, Zhixiong "James"

263

Introducing relativity  

Science Journals Connector (OSTI)

... from this discussion, to be followed by an updated description of black holes and the Kuskal manifold.

Paul Davies

1977-09-22T23:59:59.000Z

264

The middle Jacobian of three-dimensional varieties  

Science Journals Connector (OSTI)

The paper gives a survey of the most recent transcendental methods in the theory of three-dimensional algebraic manifolds.

A. N. Tyurin

1980-06-01T23:59:59.000Z

265

Instructions for use Parallel and four-step synthesis of natural-product-  

E-Print Network (OSTI)

a piperidine-based manifold 6, having a carboxylic acid group, was achieved through Ugi condensation, N

Tsunogai, Urumu

266

Atomizing nozzle and process  

DOE Patents (OSTI)

High pressure atomizing nozzle includes a high pressure gas manifold having a divergent expansion chamber between a gas inlet and arcuate manifold segment to minimize standing shock wave patterns in the manifold and thereby improve filling of the manifold with high pressure gas for improved melt atomization. The atomizing nozzle is especially useful in atomizing rare earth-transition metal alloys to form fine powder particles wherein a majority of the powder particles exhibit particle sizes having near-optimum magnetic properties.

Anderson, I.E.; Figliola, R.S.; Molnar, H.M.

1993-07-20T23:59:59.000Z

267

Microfluidic Technologies for Quantitative Single Cell Analysis  

E-Print Network (OSTI)

and pressurized air. An Arduino processor and onboard memorya manifold on the left. An Arduino processor enables complex

Novak, Richard

2013-01-01T23:59:59.000Z

268

A model for matrix acidizing of long horizontal well in carbonate reservoirs  

E-Print Network (OSTI)

of a m , b m and c m given by Tables 2.1, and 2.2 respectively. For low perforation shot densities, the flow geometry around a perforation becomes extremely complicated. According to Karakas & Tariq?s work 14 , the 3D convergence skin factor can... presented in Karakas and Tariq?s paper 14 , and are given by Table 2.3. These equations can be used to estimate the perforation skin factor for most practical ranges of system parameters (h D ?10 and r pD ?0.01). Table 2.1 Correlation constant, a m...

Mishra, Varun

2009-06-02T23:59:59.000Z

269

Apparatus and method for cooling a combustor cap  

DOE Patents (OSTI)

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.

Zuo, Baifang; Washam, Roy Marshall; Wu, Chunyang

2014-04-29T23:59:59.000Z

270

Gradient zone-boundary control in salt-gradient solar ponds  

DOE Patents (OSTI)

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.

Hull, J.R.

1982-09-29T23:59:59.000Z

271

Fuel combustion exhibiting low NO{sub x} and CO levels  

DOE Patents (OSTI)

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.

Keller, J.O.; Bramlette, T.T.; Barr, P.K.

1996-07-30T23:59:59.000Z

272

Microchannel heat sink assembly  

DOE Patents (OSTI)

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.

Bonde, W.L.; Contolini, R.J.

1992-03-24T23:59:59.000Z

273

Gas holdup in a gas-liquid-fiber semi-batch bubble column.  

E-Print Network (OSTI)

??A 4-m high, 15.24-cm diameter semi-batch bubble column connected to one of three perforated plate gas distributors with open area ratios A = 0.57%, 0.99%, (more)

Su, Xuefeng

2005-01-01T23:59:59.000Z

274

paraoesophageal hernia  

E-Print Network (OSTI)

This Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formatted PDF and full text (HTML) versions will be made available soon. Intrathoracic drainage of a perforated prepyloric gastric ulcer with a type II paraoesophageal hernia

Robert A Pol; Hiske W Wiersma; Bas Jgl Zonneveld; Marinus Eeftinck Schattenkerk; Robert A. Pol; Hiske W. Wiersma; Bas J. G. L. Zonneveld; Marinus Eeftinck Schattenkerk

2008-01-01T23:59:59.000Z

275

Single-site sonoporation disrupts actin cytoskeleton organization  

Science Journals Connector (OSTI)

...biophysical impact. This model would be important to substantiate the merit of sonoporation as an emerging membrane perforation technique...B Flickinger, P Hohenberger, LH Wegner, W Frey, and P Nick. 2009 Nanosecond electric pusles trigger actin responses in...

2014-01-01T23:59:59.000Z

276

Darwin's dilemma: the realities of the Cambrian explosion  

Science Journals Connector (OSTI)

...primitive deuterostomes does, therefore, seem to have more merit. In particular the perforations along either lateral margin...numerous scientists, and I wish especially to thank Graham Budd, Nick Butterfield, John Peel and Degan Shu for discussions. This...

2006-01-01T23:59:59.000Z

277

Prediction of subgap states in Zn- and Sn-based oxides using various exchange-correlation functionals  

E-Print Network (OSTI)

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...

Krner, Wolfgang; Urban, Daniel F.; Ramo, David Muoz; Bristowe, Paul D.; Elssser, Christian

2014-11-21T23:59:59.000Z

278

Towards a reliable and efficient furnace simulation tool for coal fired utility boilers  

Science Journals Connector (OSTI)

A validation exercise is presented with the objective of demonstrating that using a mature furnace simulation tool on high end supercomputers enables the reliable prediction of coal-fired utility boiler perfor...

Benedetto Risio; Uwe Schnell

1999-01-01T23:59:59.000Z

279

DOE Zero Energy Ready Home Case Study 2014: Healthy Efficient...  

Energy Savers (EERE)

and two 2-inch layers of EPS for R-23. Poured concrete footings using perforated plastic "lumber" forms for drainage along inside and outside of footing; 8-inch bed of 1-inch...

280

Active negative-index metamaterial powered by an electron beam  

E-Print Network (OSTI)

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 ...

Shapiro, Michael

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

IN THIS ISSUE:  

Science Journals Connector (OSTI)

......striatum after dopamine depletion, is this a sign of maladaptive brain plasticity? Veronica Anaya-Martinez, Ana Luisa Gutierrez-Valdez...that both striata exhibit more perforated synapses, suggesting brain plasticity that might be deleterious for the dendritic spines......

In This Issue

2014-12-01T23:59:59.000Z

282

UV water disinfector  

DOE Patents (OSTI)

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.

Gadgil, A.; Garud, V.

1998-07-14T23:59:59.000Z

283

Seismic imaging of hydraullically-stimulated fractures: A numerical study of the effect of the source mechanism  

E-Print Network (OSTI)

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 ...

Shabelansky, Andrey Hanan

2012-01-01T23:59:59.000Z

284

The Y-12 Times, a newsletter for employees and friends of the...  

NLE Websites -- All DOE Office Websites (Extended Search)

Site Office " " Sherry's next move SHERRY, cont. on pg. 2 2 To continue strengthening conduct of operations at Y-12, a new CONOPS Perfor- mance Improvement Plan was issued in...

285

Organisms as Producers of Carbonate Sediment and Indicators of Environment in the Southern Persian Gulf  

Science Journals Connector (OSTI)

Increasing restriction seems to have clearest effect where salinities attain 50 gm/litre, this barrier coinciding with the disappearance of most perforate Foraminifera, red algae, corals, echinoderms, and many ot...

M. W. Hughes Clarke; A. J. Keij

1973-01-01T23:59:59.000Z

286

Dose assessment for inhalation intakes in complex, energetic environments: experience from the US Capstone study  

Science Journals Connector (OSTI)

......the associated health effect risks...perforated by depleted uranium ammunition...al. Capstone depleted uranium aerosols: generation...et al. Human health risk assessment of Capstone depleted uranium aerosols. In......

Raymond A. Guilmette; Mary Ann Parkhurst

2007-11-01T23:59:59.000Z

287

Symbol Synchronization in Coded UWB Systems using Adaptive Iterative Detection Durai Thirupathi and Keith M. Chugg  

E-Print Network (OSTI)

common UWB system found in the literature, the impulse radio, uses very narrow pulses as a way to expand significantly degrading the perfor- mance. I. INTRODUCTION After the discovery of turbo codes [1], iterative

Southern California, University of

288

IEEE TRANSACTIONS ON INFORMATION THEORY, VOL. 47, NO. 2, FEBRUARY 2001 493 Introduction to the Special Issue on Codes on Graphs  

E-Print Network (OSTI)

by the excellent perfor- mance exhibited by the turbo codes of Berrou and Glavieux, MacKay and Neal's near-capacity results on Gallager codes, and the linear-complexity expander graph codes of Sipser and Spielman

Frey, Brendan J.

289

Structural elucidation of a common architecture of the nuclear pore complex and COPIl vesicle coats  

E-Print Network (OSTI)

Nuclear pore complexes (NPCs) are massive protein assemblies that perforate the nuclear envelope and form the exclusive passageway for nucleocytoplasmic transport. NPCs play critical roles in molecular transport and a ...

Brohawn, Stephen Graf

2010-01-01T23:59:59.000Z

290

Automated Fingerprinting of Performance Pathologies Using Performance Monitoring Units (PMUs)  

E-Print Network (OSTI)

challenge. We describe a technique that uses data mining to automatically fingerprint a program's perfor (PMU). These events can provide insights into how running code is exploiting hardware resources

Gupta, Indranil

291

Clean Cities White Paper Template  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

iii CONTENTS ACKNOWLEDGEMENTS ...................................................................................................... v GLOSSARY ............................................................................................................................. vii 1 INTRODUCTION TO HYDRAULIC FRACTURING AND SHALE GAS PRODUCTION ....................................................................................................... 1 1.1 Road and Well Pad Construction ............................................................................ 1 1.2 Drilling .................................................................................................................... 1 1.3 Casing and Perforating ............................................................................................ 3

292

Method of manufacturing a heat pipe wick with structural enhancement  

DOE Patents (OSTI)

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.

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

293

Mechanisms of liquid sheet breakup and the resulting drop size distributions; Part 2: strand breakup and experimental observations  

SciTech Connect

This paper reports that both a wave mechanism and a perforation mechanism have been proposed as the first step in the breakup of fluid sheets. For black liquor sprays, the dominant mechanism is the formation and growth of perforations according to either mechanism, cylindrical strands develop and subsequently break up to form drops. By combining the results of analyzing the breakup of both the sheet and strands, only a discrete number of drop sizes can be predicted from the wave mechanism.

Spielbauer, T.M.; Aidum, C.K. (Institute of Paper Science and Technology, Atlanta, GA (United States))

1992-03-01T23:59:59.000Z

294

Calculation of Savannah River K Reactor Mark-22 assembly LOCA/ECS power limits  

SciTech Connect

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.

Fischer, S.R.; Farman, R.F.; Birdsell, S.A.

1992-02-01T23:59:59.000Z

295

Calculation of Savannah River K Reactor Mark-22 assembly LOCA/ECS power limits  

SciTech Connect

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.

Fischer, S.R.; Farman, R.F.; Birdsell, S.A.

1992-01-01T23:59:59.000Z

296

E-Print Network 3.0 - andrei krivoshei vello Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

13. Juan Antonio Navarro Perez and ... Source: Fhndrich, Manuel A. - Microsoft Research Collection: Computer Technologies and Information Sciences 8 Principal manifolds and...

297

Some studies on industrial Refrigeration system integrated With encapsulated pcm in cool Thermal energy storage system;.  

E-Print Network (OSTI)

??The widespread use of refrigeration and air conditioning utilities newlineespecially in the developing countries has increased manifold during the last newlinedecade This additional load on (more)

Cheralathan M

2014-01-01T23:59:59.000Z

298

Modular robot  

DOE Patents (OSTI)

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.

Ferrante, Todd A. (Idaho Falls, ID)

1997-01-01T23:59:59.000Z

299

Modular robot  

DOE Patents (OSTI)

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.

Ferrante, T.A.

1997-11-11T23:59:59.000Z

300

Combustion optimization in a hydrogen-enhanced lean burn SI engine  

E-Print Network (OSTI)

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 ...

Goldwitz, Joshua A. (Joshua Arlen), 1980-

2004-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Convergence analysis of Riemannian trust-region methods  

E-Print Network (OSTI)

Jun 19, 2006 ... Joao Xavier and Victor Barroso, Intrinsic variance lower bound (IVLB): An extension of the. Cramer-Rao bound to Riemannian manifolds, Proc.

2006-06-19T23:59:59.000Z

302

Yuan T. Lee  

NLE Websites -- All DOE Office Websites (Extended Search)

complex phenomenon. Oxygen molecules in air react with carbon and hydrogen in organic molecules. A manifold of primary products are formed, often unstable and reactive....

303

Michel Sorel  

NLE Websites -- All DOE Office Websites (Extended Search)

27 Horn Cooling: Support Structure and Water Manifolds 28 Horn Cooling: Details of a Vibration Isolation Bellows and Nozzle 29 Outer Conductor with Cooling System 30 Twist...

304

E-Print Network 3.0 - aging tests ii Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Technologies and Information Sciences ; Engineering 12 1178 IEEE TRANSACTIONS ON IMAGE PROCESSING, VOL. 17, NO. 7, JULY 2008 Image-Based Human Age Estimation by Manifold...

305

tentative program  

E-Print Network (OSTI)

Sep 28, 2014 ... with Jon Brown, Gabriel Nagy, Aidan Sims, and Dana Williams. David Fisher Groups acting on Manifolds: Around the Zimmer Program.

2014-09-19T23:59:59.000Z

306

Development of Novel Transition Metal Catalyzed Transformations Involving Small, Strained Carbocycles  

E-Print Network (OSTI)

................................................................................... 84 2.4.3. Synthesis Gas Manifold Construction ..................................................... 85 2.4.4. General Procedure for Ligand Screening................................................. 87 2.4.5. Analytical Procedure...

Sherrill, William M.

2009-01-01T23:59:59.000Z

307

The Casimir Effect for Generalized Piston Geometries  

E-Print Network (OSTI)

In this paper we study the Casimir energy and force for generalized pistons constructed from warped product manifolds of the type $I\\times_{f}N$ where $I=[a,b]$ is an interval of the real line and $N$ is a smooth compact Riemannian manifold either with or without boundary. The piston geometry is obtained by dividing the warped product manifold into two regions separated by the cross section positioned at $R\\in(a,b)$. By exploiting zeta function regularization techniques we provide formulas for the Casimir energy and force involving the arbitrary warping function $f$ and base manifold $N$.

Guglielmo Fucci; Klaus Kirsten

2012-03-29T23:59:59.000Z

308

NAVARRO RESEARCH AND ENGINEERING, INC  

NLE Websites -- All DOE Office Websites (Extended Search)

online with moderate repair or refurbishment expenditures, including pump replacement, pipeline repair or replacement and manifold repair or replacement. Work on pipelines and...

309

Existence of homogeneous vectors on the fiber space of the tangent bundle  

Science Journals Connector (OSTI)

Let M = G/K be a homogeneous differentiable manifold. We consider the homogeneous bundle $$ \\Im $$ = (G, ?, G/K, K) ...

R. Chavosh Khatamy; M. Toomanian

2007-09-01T23:59:59.000Z

310

Transformation Formula of the "2nd" Order Mock Theta Function  

E-Print Network (OSTI)

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.

Kazuhiro Hikami

2006-04-04T23:59:59.000Z

311

Curriculum Vitae  

E-Print Network (OSTI)

gree Park, Colorado. (June 2014). G-braided Frobenius manifolds, Graduate Workshop on Moduli of Curves, Simons Cen- ter for Geometry and Physics.

2015-01-12T23:59:59.000Z

312

Audio localization in the Automatic Cameraman  

E-Print Network (OSTI)

Design layout of the FPGA and MEMS microphone audio captureCameraman (TAC): Software Design 1.4 Audio Localization inTDOA Manifold Chapter 3 Audio Localization . . . . . . . . .

Ettinger, Evan Ira

2010-01-01T23:59:59.000Z

313

Casing design for trapped annular pressure buildup  

SciTech Connect

Conventional single-string analysis for casing design with annular-fluid expansion can underpredict or overpredict pressures between strings because multistring effects are neglected. Multiple-string systems with multiple sealed annuli behave as composite interactive systems. This paper presents a constitutive-based multistring analysis method for composite string effects and complex fluid behavior. The composite stiffness of cemented casings is determined from elastic stress/strain relationships, and the nonlinear fluid behavior is modeled by direct use of fluid PVT relations in the formulation and solution. The method is incorporated in a computer model linking comprehensive stress calculations to accurate temperature and pressure predictions. Sensitivity studies of the system response to various key parameters and operating conditions are presented, and comparisons are made with single-string analyses to demonstrate the strong interaction between casing strings.

Halal, A.S.; Mitchell, R.F. (Enertech Engineering Research Co., Houston, TX (United States))

1994-06-01T23:59:59.000Z

314

A 3.55 keV line from $\\text{DM}\\rightarrow a \\rightarrow ?$: predictions for cool-core and non-cool-core clusters  

E-Print Network (OSTI)

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.

Joseph P. Conlon; Andrew J. Powell

2014-06-20T23:59:59.000Z

315

EFFECTS OF LOCAL DISSIPATION PROFILES ON MAGNETIZED ACCRETION DISK SPECTRA  

SciTech Connect

We present spectral calculations of non-LTE accretion disk models appropriate for high-luminosity stellar mass black hole X-ray binary systems. We first use a dissipation profile based on scaling the results of shearing box simulations of Hirose et al. to a range of annuli parameters. We simultaneously scale the effective temperature, orbital frequency, and surface density with luminosity and radius according to the standard {alpha}-model. This naturally brings increased dissipation to the disk surface layers (around the photospheres) at small radii and high luminosities. We find that the local spectrum transitions directly from a modified blackbody to a saturated Compton scattering spectrum as we increase the effective temperature and orbital frequency while decreasing midplane surface density. Next, we construct annuli models based on the parameters of a L/L{sub Edd} = 0.8 disk orbiting a 6.62 solar mass black hole using two modified dissipation profiles that explicitly put more dissipation per unit mass near the disk surface. The new dissipation profiles are qualitatively similar to the one found by Hirose et al., but produce strong near power-law spectral tails. Our models also include physically motivated magnetic acceleration support based once again on scaling the Hirose et al. results. We present three full-disk spectra, each based on one of the dissipation prescriptions. Our most aggressive dissipation profile results in a disk spectrum that is in approximate quantitative agreement with certain observations of the steep power-law spectral states from some black hole X-ray binaries.

Tao, Ted [Department of Physics, St. Mary's College of Maryland, St. Mary's City, MD 20686 (United States); Blaes, Omer [Department of Physics, University of California, Santa Barbara, CA 93106 (United States)

2013-06-10T23:59:59.000Z

316

Gravel pack completion for in situ leach wells  

SciTech Connect

An apparatus is described for completing a well comprising: a perforated liner; a first check valve means connected to the lower end of the perforated liner, the first check valve means normally closed to downward flow; a second check valve means connected to the first check valve means, the second check valve normally closed to upward flow; a spacer pipe attached to the upper end of the perforated liner; and packer means on the spacer pipe; and a stinger pipe assembly comprising: a stinger pipe having a continuous bore therethrough and being of a sufficient length to extend completely through the perforated liner and both the first and second check valve means and from the lower end thereof; the first and second check valve means being held in an open position by the stinger pipe when the pipe is positioned through the check valve means and adapted to close when the stringer pipe is withdrawn therefrom; means adapted to connect the stinger pipe to a drill stem; whereby flow from the drill stem will flow through the stinger pipe and blow out below the liner; and means for releasably connecting the perforated liner assembly and the stinger pipe assembly together.

Mays, W.M.

1989-05-02T23:59:59.000Z

317

The Log-Concavity Conjecture for the DuistermaatHeckman Measure Revisited  

Science Journals Connector (OSTI)

......whose fixed-points sets have no four dimensional components...A symplectic four-manifold which...action with fixed points must have b...that for any four-manifold b...whose fixed-points set has codimension...action on P lifts to an action......

Yi Lin

2008-01-01T23:59:59.000Z

318

LAGRANGIAN EMBEDDINGS INTO SUBCRITICAL STEIN PAUL BIRAN AND KAI CIELIEBAK  

E-Print Network (OSTI)

LAGRANGIAN EMBEDDINGS INTO SUBCRITICAL STEIN MANIFOLDS PAUL BIRAN AND KAI CIELIEBAK Abstract. In this paper we obtain new topological restrictions on La- grangian embeddings into subcritical Stein manifolds of C n to the more general case of subcritical Stein mani- folds. 1. Introduction This paper is devoted

Cieliebak, Kai

319

Shapes of geodesic nets. Alexander Nabutovsky and Regina Rotman  

E-Print Network (OSTI)

Shapes of geodesic nets. Alexander Nabutovsky and Regina Rotman August 14, 2006 Abstract Let M n infinitely many geometrically distinct geodesic nets on this manifold. We will also show that either the length of a shortest pe­ riodic geodesic is bounded in terms of the volume of a manifold M n

Nabutovsky, Alexander

320

Image-Set Matching using a Geodesic Distance and Cohort Normalization Yui Man Lui, J. Ross Beveridge, Bruce A. Draper  

E-Print Network (OSTI)

Image-Set Matching using a Geodesic Distance and Cohort Normalization Yui Man Lui, J. Ross are viewed as points on a Grassmann manifold, then geodesic distance on the manifold becomes the natural way-known image-set matching algorithm, Mutual Subspace Method (MSM), which does not use geodesic dis- tance

Draper, Bruce A.

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Information geometry and the hydrodynamical formulation of quantum mechanics  

E-Print Network (OSTI)

Let (M,g) be a compact, connected and oriented Riemannian manifold. We denote D the space of smooth probability density functions on M. In this paper, we show that the Frechet manifold D is equipped with a Riemannian metric g^{D} and an affine connection \

Molitor, Mathieu

2012-01-01T23:59:59.000Z

322

Milnor-Wood inequalities for products  

E-Print Network (OSTI)

We prove Milnor-Wood inequalities for local products of manifolds. As a consequence, we establish the generalized Chern Conjecture for products $M\\times \\Sigma^k$ for any product of a manifold $M$ with a product of $k$ copies of a surface $\\Sigma$ for $k$ sufficiently large.

Bucher, Michelle

2012-01-01T23:59:59.000Z

323

A CANTOR SET WITH HYPERBOLIC COMPLEMENT JUAN SOUTO AND MATTHEW STOVER  

E-Print Network (OSTI)

self- homeomorphism. The first example of this phenomenon is due to Antoine [2] who constructed metric. More concretely, we prove that an open 3-manifold is hyperbolic if it admits a nested exhaustion. Following Myers [16], we say that a compact orientable 3-manifold M is excellent if it is irreducible

Souto, Juan

324

Lime pretreatment and enzymatic hydrolysis of corn stover  

E-Print Network (OSTI)

and then distributed to each column by the air-manifold having one input and 10 output fittings. Compressed nitrogen gas (Praxair Co., College Station, TX) was used to make the non-oxidative condition and supplied to each column by the N2-manifold after preheating...

Kim, Se Hoon

2005-08-29T23:59:59.000Z

325

DOI 10.1007/s00208-007-0102-6 Mathematische Annalen Topological properties of Eschenburg spaces  

E-Print Network (OSTI)

25 · 57R19 Riemannian manifolds with positive sectional curvature have been a frequent topic Eschenburg spaces Ea,b,c whicharediffeomorphictoeachother,butnotisometric.Itisgivenby(a, b, c) = (2279, 1603 such pairs. The manifolds Ea,b,c also carry a metric of positive sectional curvature, although the 3-Sasakian

Chinburg, Ted

326

Travaux mathematiques, Volume 19 (2011), 125166, c Universite du Luxembourg Berezin-Toeplitz quantization and its kernel expansion  

E-Print Network (OSTI)

of these expansions. Contents 1 Introduction 126 2 Quantization of K¨ahler manifolds 126 2.1 Bergman projections . . . . . . . . . . . . 141 2.6 Algebra of Toeplitz operators, Berezin-Toeplitz star-product . . . 145 2.7 Quantization geometric data of the manifold and prequantum bundle they found extensive and deep applications in the study

Ma, Xiaonan - Institut de Mathématiques de Jussieu, Université Paris 7

327

Some remarks on Betti numbers of random polygon Clment Dombry and Christian Mazza y  

E-Print Network (OSTI)

Some remarks on Betti numbers of random polygon spaces Clément Dombry #3; and Christian Mazza y to a random manifold. The complexity of such manifolds can be approached by computing Betti numbers, the Euler characteristics, or the related Poincaré poly- nomial. We study the average values of Betti numbers of dimension p

Recanati, Catherine

328

"L -Betti numbers of mapping tori and groups" by  

E-Print Network (OSTI)

2 "L -Betti numbers of mapping tori and groups-Betti numbers of a manifold fibered over S1 are trivial. Secondly, the first L2-Betti number * *of aspherical manifold M be fibered over the circle S1. Then all L2-* *Betti numbers bp(M) are trivial. Let

Lück, Wolfgang

329

Convex Geometric Analysis MSRI Publications  

E-Print Network (OSTI)

. The Schatten trace class of linear mapping on the n-dimensional Euclidean space equipped with the norm p entropy of a d-dimensional manifold, we first look for an atlas, a collection of charts (Ui, i)1i the number N of charts in the atlas, we look at the Grassmann manifold in L(Rn ) with the right metric

Pajor, Alain

330

The Riemannian Potato: an automatic and adaptive artifact detection method for online experiments  

E-Print Network (OSTI)

The Riemannian Potato: an automatic and adaptive artifact detection method for online experiments manifold. Since the Riemannian metric is non-linear, this region of interest corresponds to a "potato" in the Riemannian manifold. Fig. 1 shows the potato for a dataset of 100 2x2 covariance matrices on simulated data

Paris-Sud XI, Université de

331

Clara Aldana (Nantes) "Determinants of Laplace operators on planar polygons and angular sectors"  

E-Print Network (OSTI)

sectors" Abstract: I will talk about work in progress with J. Rowlett and W. Mueller. We study on manifolds with boundary and index of symplectomorphisms on manifolds with boundary" Abstract: Let : T X \\ 0, that U is always Fredholm and set i() = i(U ). In a joint work with S. Coriasco and E. Schrohe, we

Baer, Christian

332

Clara Aldana (Nantes) Abstract: TBA  

E-Print Network (OSTI)

Program Clara Aldana (Nantes) TBA Abstract: TBA Ubertino Battisti (Torino) "Fourier integral operators on manifolds with boundary and index of symplectomorphisms on manifolds with boundary" Abstract using Egorov Theorem, that U is always Fredholm and set i() = i(U ). In a joint work with S. Coriasco

Baer, Christian

333

Adjustable flow rate controller for polymer solutions  

DOE Patents (OSTI)

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.

Jackson, Kenneth M. (Bartlesville, OK)

1981-01-01T23:59:59.000Z

334

Narrow groove welding gas diffuser assembly and welding torch  

DOE Patents (OSTI)

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.

Rooney, Stephen J. (East Berne, NY)

2001-01-01T23:59:59.000Z

335

High specific power, direct methanol fuel cell stack  

DOE Patents (OSTI)

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.

Ramsey, John C. (Los Alamos, NM); Wilson, Mahlon S. (Los Alamos, NM)

2007-05-08T23:59:59.000Z

336

A Residual Mass Ballistic Testing Method to Compare Armor Materials or Components (Residual Mass Ballistic Testing Method)  

SciTech Connect

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.

Benjamin Langhorst; Thomas M Lillo; Henry S Chu

2014-05-01T23:59:59.000Z

337

Fail-safe storage rack for irradiated fuel rod assemblies  

DOE Patents (OSTI)

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.

Lewis, D.R.

1993-03-23T23:59:59.000Z

338

Unfolding-based corrector estimates for a reaction-diffusion system predicting concrete corrosion  

E-Print Network (OSTI)

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.

Fatima, Tasnim; Ptashnyk, Mariya

2011-01-01T23:59:59.000Z

339

Fail-safe storage rack for irradiated fuel rod assemblies  

DOE Patents (OSTI)

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.

Lewis, Donald R. (Pocatello, ID)

1993-01-01T23:59:59.000Z

340

Battery Vent Mechanism And Method  

DOE Patents (OSTI)

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.

Ching, Larry K. W. (Littleton, CO)

2000-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Battery venting system and method  

DOE Patents (OSTI)

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.

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

342

High Temperature Fuel Cell (Phosphoric Acid) Manufacturing R&D  

NLE Websites -- All DOE Office Websites (Extended Search)

TEMPERATURE FUEL CELL TEMPERATURE FUEL CELL (PHOSPHORIC ACID) MANUFACTURING R&D Sridhar Kanuri Manager, Phosphoric acid fuel cells & fuel processing August 10 th , 2011 PAFC MANUFACTURING R&D Agenda PAFC cost challenge Manufacturing Cost reduction opportunities Summary PAFC SYSTEM OVERVIEW Overview Heaters Reactant manifolds Manifold adaptors Axial load system Pressure Plates Power take-off Coolant manifolds Insulation H frame Coolant hoses Cell stack Assembly Fuel Processing System Thermal Management System / Water Treatment System Power Supply System (CSA's) Electrical System Module Blower Skid Powerplant modules Cost reduction is being accomplished by incremental changes in technology and manufacturing Closing commercialization gap Continuous manufacturing

343

Improved Direct Methanol Fuel Cell Stack  

DOE Patents (OSTI)

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.

Wilson, Mahlon S. (Los Alamos, NM); Ramsey, John C. (Los Alamos, NM)

2005-03-08T23:59:59.000Z

344

Topology Change and the Propagation of Massless Fields  

E-Print Network (OSTI)

We analyse the massless wave equation on a class of two dimensional manifolds consisting of an arbitrary number of topological cylinders connected to one or more topological spheres. Such manifolds are endowed with a degenerate (non-globally hyperbolic) metric. Attention is drawn to the topological constraints on solutions describing monochromatic modes on both compact and non-compact manifolds. Energy and momentum currents are constructed and a new global sum rule discussed. The results offer a rigorous background for the formulation of a field theory of topologically induced particle production.

Jonathan Gratus; Robin W Tucker

1995-02-07T23:59:59.000Z

345

Lamination cooling system formation method  

DOE Patents (OSTI)

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.

Rippel, Wally E. (Altadena, CA); Kobayashi, Daryl M. (Monrovia, CA)

2012-06-19T23:59:59.000Z

346

Lamination cooling system formation method  

DOE Patents (OSTI)

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.

Rippel, Wally E [Altadena, CA; Kobayashi, Daryl M [Monrovia, CA

2009-05-12T23:59:59.000Z

347

Catalytic Reactor For Oxidizing Mercury Vapor  

DOE Patents (OSTI)

A catalytic reactor (10) for oxidizing elemental mercury contained in flue gas is provided. The catalyst reactor (10) comprises within a flue gas conduit a perforated corona discharge plate (30a, b) having a plurality of through openings (33) and a plurality of projecting corona discharge electrodes (31); a perforated electrode plate (40a, b, c) having a plurality of through openings (43) axially aligned with the through openings (33) of the perforated corona discharge plate (30a, b) displaced from and opposing the tips of the corona discharge electrodes (31); and a catalyst member (60a, b, c, d) overlaying that face of the perforated electrode plate (40a, b, c) opposing the tips of the corona discharge electrodes (31). A uniformly distributed corona discharge plasma (1000) is intermittently generated between the plurality of corona discharge electrode tips (31) and the catalyst member (60a, b, c, d) when a stream of flue gas is passed through the conduit. During those periods when corona discharge (1000) is not being generated, the catalyst molecules of the catalyst member (60a, b, c, d) adsorb mercury vapor contained in the passing flue gas. During those periods when corona discharge (1000) is being generated, ions and active radicals contained in the generated corona discharge plasma (1000) desorb the mercury from the catalyst molecules of the catalyst member (60a, b, c, d), oxidizing the mercury in virtually simultaneous manner. The desorption process regenerates and activates the catalyst member molecules.

Helfritch, Dennis J. (Baltimore, MD)

1998-07-28T23:59:59.000Z

348

Multitaper Array Processing Kathleen E. Wage  

E-Print Network (OSTI)

Multitaper Array Processing Kathleen E. Wage November 2007 Proceedings of the 41st Asilomar has fewer time snapshots to work with, and the result is often substantial degradation in perfor of reasons, including source and/or receiver motion, environmental fluctuations, and transient excitation

Wage, Kathleen

349

A COMPLETE SYSTEM FOR POLYPS FLAGGING IN VIRTUAL COLONOSCOPY  

E-Print Network (OSTI)

both the information in the candidate polyp location and its immediate surrounding area. The proposed by Kim et. al [5], where about 3000 patients went through OC Marcelo Fiori and Pablo Mus, USA. and another 3000 through VC, seven perforations occurred in the OC while none were recorded

350

Effect of Porosity on the Stiffness of Cast Steel RICHARD A. HARDIN and CHRISTOPH BECKERMANN  

E-Print Network (OSTI)

the location, amount, and size characteristics of micro- and macroporosity, an integrated design process service perfor- mance.[2] It is anticipated that such a design process will guide and improve inspection in cast metal due to porosity or inclusions are not considered directly in part design. Instead, ad

Beckermann, Christoph

351

Analyzing the Scalability of Graph Algorithms on Eldorado Keith D. Underwood1  

E-Print Network (OSTI)

Analyzing the Scalability of Graph Algorithms on Eldorado Keith D. Underwood1 , Megan Vance2 system provides exceptional perfor- mance on a variety of sparse graph algorithms. Unfor- tunately level scalability of the Eldorado platform on several graph algorithms. 1 Introduction Algorithms

Hendrickson, Bruce

352

Detonation Simulation with the AMROC Framework Ralf Deiterding  

E-Print Network (OSTI)

Detonation Simulation with the AMROC Framework Ralf Deiterding Center for Adanced Computing, which is essential for the accurate compu- tation of detonation waves, is achieved by blockstructured perfor- mance. Cellular Structure Simulation in 2D Experiments have shown that self-sustaining detonation

Deiterding, Ralf

353

Denitrification and Nitrogen Fixation Dynamics in the Area Surrounding an Individual Ghost Shrimp (Neotrypaea californiensis) Burrow System  

Science Journals Connector (OSTI)

...perforated with holes in a 1-cm grid that were filled with aquarium...taken from the aquarium in a grid with a 1.5-cm spatial resolution...following a 1.5-cm resolution grid. Single 5-cm3 samples were...was linear) with a Shimadzu Mini-2 gas chromatograph (GC...

Victoria J. Bertics; Jill A. Sohm; Cara Magnabosco; Wiebke Ziebis

2012-03-23T23:59:59.000Z

354

Balancing Design Options with Sherpa Timothy Sherwood Mark Oskin  

E-Print Network (OSTI)

- tential benefits of optimizations rapidly. We show that the expected performance using our model processors offer the potential of rapidly designed logic specifically constructed to meet the perfor- mance be a significant engineering burden, or handle it in a fully automated fashion, which completely removes

Sherwood, Tim

355

Service Portability Why http redirect is the model for the future  

E-Print Network (OSTI)

address of sally@company.com will be de- livered to a mail server controlled by company.com, and if Sally moves to a new company there is no way for this email address to follow her there. Second, despite years. Search services do an amazing job with web pages, but for other services they perfor

356

RED Revisited Tuan Anh Trinh and Sandor Molnar  

E-Print Network (OSTI)

RED Revisited Tuan Anh Trinh and S´andor Moln´ar High Speed Networks Laboratory Department- ternet is RED. However, research results on RED perfor- mance are highly mixed, especially in the field of tuning its parameters. In this paper, we revisit some features in RED and study them in greater details

Molnár, Sándor

357

RED Revisited Tuan Anh Trinh and Sandor Molnar  

E-Print Network (OSTI)

RED Revisited Tuan Anh Trinh and S??andor Moln??ar High Speed Networks Laboratory Department­ ternet is RED. However, research results on RED perfor­ mance are highly mixed, especially in the field of tuning its parameters. In this paper, we revisit some features in RED and study them in greater details

Molnár, Sándor

358

High temperature liquid level sensor  

DOE Patents (OSTI)

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.

Tokarz, Richard D. (West Richland, WA)

1983-01-01T23:59:59.000Z

359

Bosch Sensortec Digital, triaxal acceleration sensor  

E-Print Network (OSTI)

for mobile applications. The sensor can be programmed to optimize functionality, perfor- mance and power controllers. BMA150 target applications Advanced power management for mobile devices HDD protection Drop Switchable g-range and bandwidth Low-power consumption SPI (3-wire/4-wire) and I²C interfaces Programmable

Weiss, Gary

360

Designing Comminution Circuits with a Multi-Objective Evolutionary Algorithm  

E-Print Network (OSTI)

- perience than by analysis. In this paper, we motivate the use of an evolutionary algorithm to aid in the de-objective evolutionary algorithm and create a simulation to assess the perfor- mance of candidate solutions. Results show $5.2 billion to the state of Western Australia alone [1]. Iron-ore is extracted from the ground

Coello, Carlos A. Coello

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Oil & Gas Science and Technology --Rev. IFP Energies nouvelles Copyright 2010 IFPEN Energies nouvelles  

E-Print Network (OSTI)

Oil & Gas Science and Technology -- Rev. IFP Energies nouvelles Copyright © 2010 IFPEN Energies to an effective thermal management system and to maintain safety, perfor- #12;2 Oil & Gas Science and Technology of Michigan, Ann Arbor, Michigan, 48109 - USA 2 U.S. Army Tank Automotive Research, Development

Stefanopoulou, Anna

362

Power dissipation limits have emerged as a major constraint in the design  

E-Print Network (OSTI)

. At the low end of the per­ formance spectrum, namely in the world of handheld and portable devices or systems, power has always dominated over perfor­ mance (execution time) as the primary design issue. Battery life the approach of using energy­enabled performance simulators in early design. We examine some of the emerg­ ing

Martonosi, Margaret

363

Power dissipation limits have emerged as a major constraint in the design  

E-Print Network (OSTI)

. At the low end of the per- formance spectrum, namely in the world of handheld and portable devices or systems, power has always dominated over perfor- mance (execution time) as the primary design issue. Battery life the approach of using energy-enabled performance simulators in early design. We examine some of the emerg- ing

Martonosi, Margaret

364

SimpleNPKL : Simple Non-Parametric Kernel Learning Jinfeng Zhuang ZHUA0016@NTU.EDU.SG  

E-Print Network (OSTI)

SimpleNPKL : Simple Non-Parametric Kernel Learning Jinfeng Zhuang ZHUA0016@NTU.EDU.SG Ivor W. Tsang IVORTSANG@NTU.EDU.SG Steven C.H. Hoi CHHOI@NTU.EDU.SG School of Computer Engineering, Nanyang Technological-of-the-art perfor- mance. The choice of an effective kernel plays a crucial role in many kernel based machine

Tsang Wai Hung "Ivor"

365

Studying Black Holes in the Internet with Hubble Ethan Katz-Bassett  

E-Print Network (OSTI)

as a top priority in the original design of the Internet protocols, ahead of high perfor- mance or goodStudying Black Holes in the Internet with Hubble Ethan Katz-Bassett Harsha V. Madhyastha John P that operates contin- uously to find Internet reachability problems in which routes exist to a destination

Anderson, Richard

366

In Proceedings of the 5th USENIX Symposium on Networked Systems Design and Implementation pp. 247262, San Francisco, CA, April 2008  

E-Print Network (OSTI)

of the Internet protocols, ahead of high perfor- mance or good quality of service, with the philosophy that "there­262, San Francisco, CA, April 2008 Studying Black Holes in the Internet with Hubble Ethan Katz present Hubble, a system that operates contin- uously to find Internet reachability problems in which

Madhyastha, Harsha V.

367

Evolution, revolution or saltation scenario for the emergence of modern cultures?  

Science Journals Connector (OSTI)

...ornaments, consisting of perforated marine shells belonging to a single species...figure-1 p) with clear evidence of use-wear, some bearing traces of ochre come...Contrebandiers in Morocco [67]. Other marine shells interpreted as beads (figure-1...

2011-01-01T23:59:59.000Z

368

82,000-year-old shell beads from North Africa and implications for the origins of modern human behavior  

Science Journals Connector (OSTI)

...North Africa. These marine shells come from archaeological...in South Africa. Wear patterns on the shells...integrated with the wear patterns. Conclusions...of the perforated marine shells from Taforalt...North Africa. These marine shells come from...in South Africa. Wear patterns on...

Abdeljalil Bouzouggar; Nick Barton; Marian Vanhaeren; Francesco d'Errico; Simon Collcutt; Tom Higham; Edward Hodge; Simon Parfitt; Edward Rhodes; Jean-Luc Schwenninger; Chris Stringer; Elaine Turner; Steven Ward; Abdelkrim Moutmir; Abdelhamid Stambouli

2007-01-01T23:59:59.000Z

369

Border Cave and the beginning of the Later Stone Age in South Africa  

Science Journals Connector (OSTI)

...LR B+C OES beads 0 0 11 3 Perforated marine shells (Nassarius) 0 0 1 1 Notched bones...Identifying grinding, scoring and rubbing use-wear on experimental ochre pieces . J Archaeol Sci 37 : 3344...2008 ) Developing the archaeology of Marine Isotope Stage 3 . S Afr Archaeol Soc Goodwin...

Paola Villa; Sylvain Soriano; Tsenka Tsanova; Ilaria Degano; Thomas F. G. Higham; Francesco dErrico; Lucinda Backwell; Jeannette J. Lucejko; Maria Perla Colombini; Peter B. Beaumont

2012-01-01T23:59:59.000Z

370

AEROSPACE AMERICA/DECEMBER 2009 5 A collaboration between GKN Aerospace  

E-Print Network (OSTI)

AEROSPACE AMERICA/DECEMBER 2009 5 A collaboration between GKN Aerospace and Honeywell Aerospace with a perforated composite facesheet. Far-field acoustic surveys on a full- scale demonstrator engine at Honeywell Engines, Honeywell International, Pratt & Whitney, and Rolls- Royce. Its programs include assessing the ef

Tinney, Charles E.

371

Performance of Inverted Indices in Shared-Nothing Distributed Text Document Information Retrieval SystemsPublished in PDIS '93  

E-Print Network (OSTI)

Performance of Inverted Indices in Shared-Nothing Distributed Text Document Information Retrieval document re- trieval systems is strongly in uenced by the organization of the inverted index. This paper compares the perfor- mance impact on query processing of various physical organizations for inverted lists

Zimmerman, John

372

Alert: An Adaptive Low-Latency Event-Driven MAC Protocol for Wireless Sensor Networks  

E-Print Network (OSTI)

- ing MAC protocols are optimized to conserve energy, trad- ing off latency, throughput and other of sensor nodes with minimum latency and without requir- ing any cooperation or pre-scheduling among the application demands better perfor- mance at the expense of some additional energy. If latency

Namboodiri, Vinod

373

COVER/STANDING MATERIAL:  

Science Journals Connector (OSTI)

......Takayoshi Tanji 419 The presence of perforated synapses in the striatum after dopamine depletion, is this a sign of maladaptive brain plasticity? Ver nica Anaya-Mart nez, Ana Luisa Gutierrez-Valdez, Jose Luis Ordo ez-Librado, Enrique Montiel-Flores......

Contents Page

2014-12-01T23:59:59.000Z

374

A performance evaluation of an automotive magnetorheological brake design with a sliding mode controller  

E-Print Network (OSTI)

industries due to its potential to improve vehicle perfor- mance, safety and cost. The ``x'' in x Engineering, University of Victoria, 3800 Finnerty Road, P.O. Box 3055 STN CSC, Victoria, BC, Canada V8W 3P6 flow and heat transfer analysis. The performance of the MRB in a vehicle was studied using a quarter

Park, Edward

375

Heat exchanger support apparatus in a fluidized bed  

DOE Patents (OSTI)

A heat exchanger is mounted in the upper portion of a fluidized combusting bed for the control of the temperature of the bed. A support, made up of tubes, is extended from the perforated plate of the fluidized bed up to the heat exchanger. The tubular support framework for the heat exchanger has liquid circulated therethrough to prevent deterioration of the support.

Lawton, Carl W. (West Hartford, CT)

1982-01-01T23:59:59.000Z

376

Expressive Re-Performance Laurel S. Pardue  

E-Print Network (OSTI)

. There are two major components to perfor- mance: the technical requirement of correctly playing the notes, and the emotional content conveyed through expressivity. While technical details like pitch and note order instrument with which the user steps-through a recording. Data generated from the users actions is parsed

377

Endovascular Treatment of Spontaneous Isolated Dissecting Aneurysm of the Superior Mesenteric Artery Using Stent-Assisted Coil Embolization  

SciTech Connect

Spontaneous isolated dissecting aneurysm of the main trunk of the superior mesenteric artery is a rare condition. We treated a patient with this condition successfully by stent-assisted coil embolization. Intravascular stent placement may widen the indications for endovascular coiling of the aneurysmal false lumen to avoid perforation.

Ozaki, Toshiro [Graduate School of Medical and Dental Sciences, Niigata University, Department of Radiation Oncology (Japan)], E-mail: tochi@med.niigata-u.ac.jp; Kimura, Motomasa [School of Health Sciences, Faculty of Medicine, Niigata University, Department of Radiological Technology (Japan); Yoshimura, Norihiko; Hori, Yoshiro; Takano, Toru; Kamura, Takesi; Yamamoto, Satoshi; Sasai, Keisuke [Graduate School of Medical and Dental Sciences, Niigata University, Department of Radiation Oncology (Japan)

2006-06-15T23:59:59.000Z

378

To link to this article: DOI:10.1016/j.pecs.2012.04.004 URL : http://dx.doi.org/10.1016/j.pecs.2012.04.004  

E-Print Network (OSTI)

. Specific issues linked to real gas turbine chambers are discussed: multi-perforation, complex acoustic flames in gas turbine combustion chambers. (2012) Progress in Energy and Combustion Science, vol. 38 (n turbine combustion chambers L.Y.M. Gicquel*, G. Staffelbach, T. Poinsot CERFACS, 42 Avenue G. Coriolis

Mailhes, Corinne

379

Empirical modeling and simulation of edgewater cusping and coning  

E-Print Network (OSTI)

the perforation of the producing well, excessive water production leads to increased cost. In the case when no provision is made, it represents a significant liability. The case considered here is a well producing from a monocline with an edge-water aquifer...

Ayeni, Kolawole Babajide

2008-10-10T23:59:59.000Z

380

Ozone decomposing filter  

DOE Patents (OSTI)

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.

Simandl, Ronald F. (Farragut, TN); Brown, John D. (Harriman, TN); Whinnery, Jr., LeRoy L. (Dublin, CA)

1999-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Withdrawn FIPS Listed by Number Updated 10/22/12  

E-Print Network (OSTI)

the American National Standards Institute (ANSI), U.S. private-sector standards organizations, government for Information Interchange, Its Representations, Subsets, and Extensions (ANSI X3.4- 1986/R1992, X3.32- 1990, X3.41- 1990) 84 Nov 14 97 Jul 29 62FR/40502 2-1 Perforated Tape Code for Information Interchange (ANSI X3

382

Portrait de la mobilit, des investissements et de l'offre de transport  

E-Print Network (OSTI)

transport collectif le plus performant en Amérique du Nord. Une perfor- mance qui s'appuiera sur une visant à réduire l'utilisation de l'auto solo, cette stra- tégie permettra d'augmenter de 40 % l

Charette, André

383

Initial investment choice and optimal future allocations  

E-Print Network (OSTI)

Initial investment choice and optimal future allocations M. Musielay and T. Zariphopoulouz March 21 knowledge of an investor's desirable initial investment choice can be used to determine his future optimal portfolio allocations. Optimality of investment decisions is built on forward investment perfor- mance

Zariphopoulou, Thaleia

384

A new concept of ocean acoustic tomography Lionel CROS(1)  

E-Print Network (OSTI)

a synthetic signal in ship noise with the con- straint to have an accurate estimation of the channel: discreet acoustic tomography, estimation, detection, optimization, performance analysis. R´ESUM´E COURT: La disc`ete, estimation, d´etection, optimisation, analyse de perfor- mance. 1 INTRODUCTION Ocean acoustic

Boyer, Edmond

385

Energy Consumption of Minimum Energy Coding in  

E-Print Network (OSTI)

Energy Consumption of Minimum Energy Coding in CDMA Wireless Sensor Networks Benigno Zurita Ares://www.ee.kth.se/control Abstract. A theoretical framework is proposed for accurate perfor- mance analysis of minimum energy coding energy consumption is analyzed for two coding schemes proposed in the literature: Minimum Energy coding

Johansson, Karl Henrik

386

Center for Turbulence Research Proceedings of the Summer Program 2006  

E-Print Network (OSTI)

to be cooled. In gas turbines, one often uses multi-perforated walls to produce the necessary cooling (Lefebvre. The results from two different numerical codes and strategies also compare favorably with the existing for implementing this model in coupled computational domains is developed. Deficiencies in the model are identified

Eldredge, Jeff

387

D-Arabitol Production by Endomycopsis chodati  

Science Journals Connector (OSTI)

...Utilization and Development Di- vision, Agricultural Research...more uniform material for gas passage than cotton plugs...stirrer was a flat-bladed turbine wheel, and aeration was...perforations directly beneath the turbine wheel. Foaming during...1944. Per- formance of gas-liquid contactors...

G. J. Hajny

1964-01-01T23:59:59.000Z

388

ORIGINAL PAPER Effects of nutritional status on metabolic rate, exercise  

E-Print Network (OSTI)

-Verlag 2009 Abstract The influence of feeding on swimming perfor- mance and exercise recovery in fish is poorly understood. Examining swimming behavior and physiological status following periods of feeding for swimming performance and physiological recovery. Rest- ing metabolic rates were also determined. Fasted

Suski, Cory David

389

This is an author-deposited version published in: http://oatao.univ-toulouse.fr/ Eprints ID: 8855  

E-Print Network (OSTI)

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

Mailhes, Corinne

390

Numerical Modeling of Cased-hole Instability in High Pressure and High Temperature Wells  

E-Print Network (OSTI)

mechanism of casing/cement in the non-perforated zones. We investigate the transient thermal behavior in the casing-cement-formation system resulting from the movement of wellbore fluid using finite element method. The critical value of down-hole stresses...

Shen, Zheng 1983-

2012-11-12T23:59:59.000Z

391

Beating the maximum cooling limit with graded thermoelectric materials Zhixi Bian and Ali Shakouria  

E-Print Network (OSTI)

.1063/1.2396895 The maximum cooling temperature is one of the perfor- mance parameters for a thermoelectric module. ExcludingBeating the maximum cooling limit with graded thermoelectric materials Zhixi Bian and Ali Shakouria cooling of a single element thermoelectric material cannot be improved by changing its geometry.3

392

ASTRONOMICAL AND ASTROPHYSICAL SOCIETY OF AMERICA  

Science Journals Connector (OSTI)

...light. The perforation of the convex mirror centered behind the slit is of sufficient...King in Harvard Annals, 59, 180, and Schwarzschild in his Gottingen Aktinometrie, B...brighter than magnitude 4.5, while Schwarzschild 's are about the same brightness as...

Philip Fox

1913-01-03T23:59:59.000Z

393

A new report delivers MSHP performance data for use in whole-building simulation tools.  

E-Print Network (OSTI)

-split heat pumps (MSHPs) are highly efficient refrigerant-based air conditioning and heating systems perfor- mance varies is critical in order to reasonably estimate annual energy consumption of a MSHP systems are also provided. Potential Impact Annual energy savings and better indoor comfort can

394

Crash resistant container  

DOE Patents (OSTI)

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.

Pierce, Jim D. (Albuquerque, NM)

1994-01-01T23:59:59.000Z

395

N d'ordre : 8763 THSE DE DOCTORAT  

E-Print Network (OSTI)

the air supply system of a fuel cell vehicle with on-board fuel reformer. It is necessary to state and the perfor- mances of an electrical fuel cell vehicle, and that the complexity increases when the storage of high-pressure compressed hydrogen is substituted in the vehicle by the on-board production of reformed

Boyer, Edmond

396

Enabling Performance Intelligence for Application Adaptation in the Future Internet  

E-Print Network (OSTI)

plat- form. Achieving autonomicity in the Future Internet will require a performance architecture that such "Future Internet Perfor- mance Architecture" (FIPA), and present our reference implementation of FIPA in virtualization [1] technology at end-hosts and core network switches/routers. The Global Envir

Calyam, Prasad

397

Fast Concurrent Dynamic Linking for an Adaptive Operating System  

E-Print Network (OSTI)

Fast Concurrent Dynamic Linking for an Adaptive Operating System Crispin Cowan, Tito Autrey operating system is one that can adapt to some particular circumstance to gain some functional or perfor due to the cost of inter-process protection barriers. Commercial operating systems that can e ciently

Walpole, Jonathan

398

High voltage gas insulated transmission line with continuous particle trapping  

DOE Patents (OSTI)

This invention provides a novel high voltage gas insulated transmission line utilizing insulating supports spaced at intervals with snap-in means for supporting a continuous trapping apparatus and said trapping apparatus having perforations and cutouts to facilitate trapping of contaminating particles and system flexibility.

Cookson, Alan H. (Pittsburgh, PA); Dale, Steinar J. (Monroeville, PA)

1983-01-01T23:59:59.000Z

399

preprint; submitted to Physical Review Letters in November 2003 Dipole moment of a Pb-O vacancy pair in PbTiO3  

E-Print Network (OSTI)

preprint; submitted to Physical Review Letters in November 2003 Dipole moment of a Pb-O vacancy-8520 The polarization of a nearest neighbor (nn) Pb-O vacancy pair ((VP b - VO)nn) in PbTiO3 is calculated, using and perfor- mance of these materials are expected to be strongly af- fected by defects such as lead vacancies

Burton, Benjamin P.

400

Re-Architecting DRAM Memory Systems with Monolithically Integrated Silicon Photonics  

E-Print Network (OSTI)

and could ultimately constrain achievable system performance. Area and power overheads of high off-chip bandwidth in a power-constrained system. It seems unlikely that pin bandwidth will increase dramatically without a disruptive technology. Even if we remove pin-bandwidth limitations, memory system perfor

Joshi, Ajay

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Hector Garcaa-Molrna Kenneth Salem  

E-Print Network (OSTI)

To alleviate these problems we propose the notion of a saga A LLT 1s a saga if it can be written as a sequence, LLTs present serious perfor- mance problems Since they are transactions, the system must execute them likely to conflict with an LLT than with a shorter transac- tion Furthermore, the transaction abort rate

Myers, Andrew C.

402

A Simulation Model for the Performance Evaluation for Migrating a Legacy Paulo Pinheiro da Silva  

E-Print Network (OSTI)

A Simulation Model for the Performance Evaluation for Migrating a Legacy System Paulo Pinheiro da a simulation model using CAPPLES. Peculiarities of the legacy system migration that affects the simulation of perfor- mance evaluation during migration. CAPPLES is based on simulation models. Indeed, analytical

Pinheiro da Silva, Paulo

403

FIDUCIAL POINTS EXTRACTION AND CHARACTERISTIC WAVES DETECTION IN ECG SIGNAL USING A MODEL-BASED BAYESIAN FRAMEWORK  

E-Print Network (OSTI)

FIDUCIAL POINTS EXTRACTION AND CHARACTERISTIC WAVES DETECTION IN ECG SIGNAL USING A MODEL.Jutten@inpg.fr ABSTRACT The automatic detection of Electrocardiogram (ECG) waves is important to cardiac disease diagnosis. A good perfor- mance of an automatic ECG analyzing system depends heav- ily upon the accurate

Paris-Sud XI, Université de

404

High-performance Si microwire photovoltaics Michael D. Kelzenberg,a  

E-Print Network (OSTI)

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

Atwater, Harry

405

Cu2ZnSnS4 nanocrystals and graphene quantum dots for photovoltaics Xukai Xinab  

E-Print Network (OSTI)

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

Lin, Zhiqun

406

E-Print Network 3.0 - anomalous u1 symmetries Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

for the Dirac operator. That is, let M be a spin manifold and g an isometry of M with a lift to the spin bundles. Summary: 0. (O Lambda is the hermitian adjoint of O.) Prove...

407

On the Lefschetz coincidence theorem  

SciTech Connect

The Lefschetz number is constructed for two maps of noncompact nonorientable topological manifolds of the same dimension; it is proved that if it is nonzero, then there is a coincidence point of these maps. Bibliography: 15 titles.

Artamonov, Dmitrii V [M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics, Moscow (Russian Federation)

2009-08-31T23:59:59.000Z

408

A Workshop to Identify Research Needs and Impacts in Predictive...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

which includes fuel manifolds and internal injector flow, 2. The multi-phase fuel-air mixing in the combustion chamber of the engine, and 3. The heat transfer and fluid...

409

Gluing Nekrasov partition functions  

E-Print Network (OSTI)

In this paper we summarise the localisation calculation of 5D super Yang-Mills on simply connected toric Sasaki-Einstein (SE) manifolds. We show how various aspects of the computation, including the equivariant index, the asymptotic behaviour and the factorisation property are governed by the combinatorial data of the toric geometry. We prove that the full perturbative partition function on a simply connected SE manifold corresponding to an n-gon toric diagram factorises to n copies of perturbative Nekrasov partition function. This leads us to conjecture the full partition function as gluing n copies of full Nekrasov partition function. This work is a generalisation of some earlier computation carried out on $Y^{p,q}$ manifolds, whose moment map cone has a quadrangle and our result is valid for manifolds whose moment map cones have pentagon base, hexagon base, etc. The algorithm we used for dealing with general cones may also be of independent interest.

Jian Qiu; Luigi Tizzano; Jacob Winding; Maxim Zabzine

2014-03-12T23:59:59.000Z

410

Gluing Nekrasov partition functions  

E-Print Network (OSTI)

In this paper we summarise the localisation calculation of 5D super Yang-Mills on simply connected toric Sasaki-Einstein (SE) manifolds. We show how various aspects of the computation, including the equivariant index, the asymptotic behaviour and the factorisation property are governed by the combinatorial data of the toric geometry. We prove that the full perturbative partition function on a simply connected SE manifold corresponding to an n-gon toric diagram factorises to n copies of perturbative Nekrasov partition function. This leads us to conjecture the full partition function as gluing n copies of full Nekrasov partition function. This work is a generalisation of some earlier computation carried out on $Y^{p,q}$ manifolds, whose moment map cone has a quadrangle and our result is valid for manifolds whose moment map cones have pentagon base, hexagon base, etc. The algorithm we used for dealing with general cones may also be of independent interest.

Qiu, Jian; Winding, Jacob; Zabzine, Maxim

2014-01-01T23:59:59.000Z

411

Publications  

E-Print Network (OSTI)

books ... for sub-Riemannian manifolds , To appear in Journal of Functional Analysis, 2014, ... With Cheng Ouyang and Samy Tindel: Upper bounds for the density of ... Potential Theory and Stochastics in Albac, Aurel Cornea Memorial Volume...

412

Building America Whole-House Solutions for New Homes: Insight Homes, Seaford, Delaware  

Energy.gov (U.S. Department of Energy (DOE))

Case study of Insight Homes, who worked with the Building America research partner IBACOS to design HERS-49 homes with high-efficiency HVAC, ducts in insulated crawl spaces, raised heel trusses, dehumidifiers, and central manifold plumbing.

413

UPDATE:  

Science Journals Connector (OSTI)

......science, social sciences and arts and humanities...its other uses in science are manifold. The...Computers in university education: a workshop for the physical sciences and life sciences...January 1, 1987. Posters and/or demonstration......

News; Views

1986-12-01T23:59:59.000Z

414

Macrophage-Mediated Endothelial Inflammatory Responses to Airborne Particulates: Impact of  

E-Print Network (OSTI)

-Fe/F-Al-Si). We have used these particulates, as well as coal fly ash (CFA) and diesel exhaust particulates (DEP remain unresolved. Using a microporous aluminosilicate zeolite Y as a manifold, we have synthesized 1 µm

Dutta, Prabir K.

415

Microfluidic microarray systems and methods thereof  

DOE Patents (OSTI)

Disclosed are systems that include a manifold in fluid communication with a microfluidic chip having a microarray, an illuminator, and a detector in optical communication with the microarray. Methods for using these systems for biological detection are also disclosed.

West, Jay A. A. (Castro Valley, CA); Hukari, Kyle W. (San Ramon, CA); Hux, Gary A. (Tracy, CA)

2009-04-28T23:59:59.000Z

416

Response kinetics and pharmacological properties of heteromeric receptors formed by coassembly of GABA rho- and gamma2-subunits  

Science Journals Connector (OSTI)

...manifold and operated under computer command, was used to deliver...analysis were controlled by a computer running Patchit software (Grant & Werblin 1994) through a...This work was supported by grants from the National Eye Institute...

1999-01-01T23:59:59.000Z

417

CF8C PLus: A New Cast Stainless Steel for High-Temperature Diesel...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

exhaust components turbo-housing exhaust manifold C-15, 14.6L HD On- Highway Diesel Engine Materials Need: High Performance Low-Cost Alloy was Needed to Replace SiMo Cast Iron...

418

Generating Forms for Exact Volume-Preserving Maps  

E-Print Network (OSTI)

We study the group of volume-preserving diffeomorphisms on a manifold. We develop a general theory of implicit generating forms. Our results generalize the classical formulas for generating functions of symplectic twist maps.

H. E. Lomel; J. D. Meiss

2008-03-30T23:59:59.000Z

419

On the three-web associated to the core of a left Bol three-web  

Science Journals Connector (OSTI)

Let B ? be a left Bol three-web given on a 2r-dimensional smooth manifold, CB ? the left Bol three-web associated to the core of B ?, and let CCB ? ...

G. A. Tolstikhina; A. M. Shelekhov

2014-12-01T23:59:59.000Z

420

Timelike reduction and T-duality  

E-Print Network (OSTI)

In the light of recent developments in Superstring Theory, it has become of interest to study Kaluza-Klein dimensional reduction of supergravities not only on spatial manifolds, but also on the time direction. We study a particularly relevant class...

Scuro, Sante Rodolfo

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A quadrature formula for diffusion polynomials corresponding to a generalized heat kernel  

E-Print Network (OSTI)

be used to construct a local coordinate atlas on manifolds, preserving the order of magnitude of the distances between points within each chart. Several applications, especially in the context of semi

Mhaskar, Hrushikesh Narhar

422

Spectroscopic signatures of doorway-mediated intersystem crossing  

E-Print Network (OSTI)

Intersystem crossing in acetylene, C?H?, is described by a doorway-mediated model, where singlet-triplet mixing between the first excited singlet~ state, S?, and the manifold of low-lying T?,? states is controlled by special ...

Bittinger, Kyle Lee

2009-01-01T23:59:59.000Z

423

Smooth structures, the gluing lemma, straightening corners, surgery, and handles  

E-Print Network (OSTI)

Structures Let M be a topological manifold. A smooth structure on M is a maximal smooth atlas. A smooth atlas. Claim: (M, ), the surgery on , and (M, ), the trace of the surgery on , have "canonical" smooth

Davis, James F.

424

High-pressure-temperature gradient instrument: use for determining the temperature and pressure limits of bacterial growth.  

Science Journals Connector (OSTI)

...shows the valve manifold (VM), the polystyrene foam insulation (U), and the therm- istor probe (TM) for determining...which the samples were loaded. U is the polystyrene foam insulation, AB is the aluminum block, TW the thermometer well...

A A Yayanos; R van Boxtel; A S Dietz

1984-10-01T23:59:59.000Z

425

A Certain Subgroup of the Fundamental Group  

E-Print Network (OSTI)

May 5, 2003 ... 2-dimensional manifolds the Klein Bottle K . COROLLARY 1.14. Let K be the Klein Bottle. Then G(K) ... Thus ht(ac) is in the same ?ber as ht(y).

426

A Distributed Control System for a Field of Spin-Elevation Heliostats  

Science Journals Connector (OSTI)

The aim of this paper is to describe the architecture of a distributed control system designed to handle several heliostats in a solar concentration field. The system ... the manifold solar concentration technolo...

Alessandro Carandina; Mirko Morini

2014-01-01T23:59:59.000Z

427

Robust Diameter-Based Thickness Estimation of 3D Objects Xavier Rolland-Nevi`erea,  

E-Print Network (OSTI)

processing pipeline may pro- duce a range of artifacts such as gaps, holes, non-manifold parts and triangle soups. While a thread of research has focused on repairing defect-laden data or removing artifacts

Paris-Sud XI, Université de

428

$C^{1,\\alpha}$-Regularity of energy minimizing maps from a 2-dimentional domain into a Finsler space  

E-Print Network (OSTI)

We show $C^{1,\\alpha}$-regularity for energy minimizing maps from a 2-dimensional Riemannian manifold into a Finsler space $(\\R^n, F)$ with a Finsler structure $F(u,X)$.

Tachikawa, Atsushi

2011-01-01T23:59:59.000Z

429

GEOMETRIC PROPERTIES OF EIGENFUNCTIONS DMITRY JAKOBSON, NIKOLAI NADIRASHVILI AND JOHN TOTH  

E-Print Network (OSTI)

for an oscillating string [C-H] and a theorem due to Courant [C-H] about the number of nodal domains (connected structure of the nodal sets of oscillating membranes, eigenfunctions of #1; on Riemannian manifolds

Jakobson, Dmitry

430

Flow regime mapping of vertical two-phase downflow in a ribbed annulus  

SciTech Connect

Two-phase flow regimes have been mapped for vertical, cocurrent downflow in a narrow annulus which is partially segmented by the presence of longitudinal ribs. This geometry and flow condition has application to the analysis of a Large-Break Loss of Coolant Accident (LB-LOCA) in the production K-Reactor at the Savannah River Site (SRS). The ribbed annular geometry, particularly the presence of non-sealing ribs, gives rise to some unique phenomenological features. The flow behavior is influenced by the partial segmentation of the annulus into four quadrants or subchannels. A random element is induced by the natural bowing of the slender tubes; the width of the azimuthal flow path between two subchannels at a given axial location is indeterminate, and can take on any value between zero and the maximum clearance of 7.6 [times] l0[sup [minus]4] m. When the rib gap is zero at a given location, it is at a maximum 180P away at the same axial location. The range of rib gaps is spanned in a single test section, as it would be also in a reactor assembly. As a result of these effects, flow regime maps obtained by other researchers for downflow in annuli are not accurate for defining flow regimes in a ribbed annulus. Flow regime transitions similar to those noted by, e.g., Bamea, were observed; the locations of these transitions were displaced with respect to the transition equations derived by Bamea. Experimental bubble rise velocity measurements were also obtained in the same test section. The bubble rise velocities were much higher than expected from the theory developed for slug bubbles in tubes, unribbed annuli, and rectangular channels. An elliptical-cap bubble rises faster than a slug bubble of the same area. Large, slug-shaped bubbles injected into the test section were observed to reduce in size as they rose, due to interaction with a longitudinal rib. They thereby adopted a shape more like an elliptical-cap bubble, hence rising faster than the original slug bubble.

Kielpinski, A.L.

1992-01-01T23:59:59.000Z

431

Flow regime mapping of vertical two-phase downflow in a ribbed annulus  

SciTech Connect

Two-phase flow regimes have been mapped for vertical, cocurrent downflow in a narrow annulus which is partially segmented by the presence of longitudinal ribs. This geometry and flow condition has application to the analysis of a Large-Break Loss of Coolant Accident (LB-LOCA) in the production K-Reactor at the Savannah River Site (SRS). The ribbed annular geometry, particularly the presence of non-sealing ribs, gives rise to some unique phenomenological features. The flow behavior is influenced by the partial segmentation of the annulus into four quadrants or subchannels. A random element is induced by the natural bowing of the slender tubes; the width of the azimuthal flow path between two subchannels at a given axial location is indeterminate, and can take on any value between zero and the maximum clearance of 7.6 {times} l0{sup {minus}4} m. When the rib gap is zero at a given location, it is at a maximum 180P away at the same axial location. The range of rib gaps is spanned in a single test section, as it would be also in a reactor assembly. As a result of these effects, flow regime maps obtained by other researchers for downflow in annuli are not accurate for defining flow regimes in a ribbed annulus. Flow regime transitions similar to those noted by, e.g., Bamea, were observed; the locations of these transitions were displaced with respect to the transition equations derived by Bamea. Experimental bubble rise velocity measurements were also obtained in the same test section. The bubble rise velocities were much higher than expected from the theory developed for slug bubbles in tubes, unribbed annuli, and rectangular channels. An elliptical-cap bubble rises faster than a slug bubble of the same area. Large, slug-shaped bubbles injected into the test section were observed to reduce in size as they rose, due to interaction with a longitudinal rib. They thereby adopted a shape more like an elliptical-cap bubble, hence rising faster than the original slug bubble.

Kielpinski, A.L.

1992-12-01T23:59:59.000Z

432

Multiple Transition States and Roaming in Ion-Molecule Reactions: a Phase Space Perspective  

E-Print Network (OSTI)

We provide a dynamical interpretation of the recently identified `roaming' mechanism for molecular dissociation reactions in terms of geometrical structures in phase space. These are NHIMs (Normally Hyperbolic Invariant Manifolds) and their stable/unstable manifolds that define transition states for ion-molecule association or dissociation reactions. The associated dividing surfaces rigorously define a roaming region of phase space, in which both reactive and nonreactive trajectories can be trapped for arbitrarily long times.

Frederic A. L. Mauguiere; Peter Collins; Gregory S. Ezra; Stavros C. Farantos; Stephen Wiggins

2013-09-25T23:59:59.000Z

433

Radioactivity of the Cooling Water  

DOE R&D Accomplishments (OSTI)

The most important source of radioactivity at the exit manifold of the pile will be due to O{sup 19}, formed by neutron absorption of O{sup 18}. A recent measurement of Fermi and Weil permits to estimate that it will be safe to stay about 80 minutes daily close to the exit manifolds without any shield. Estimates are given for the radioactivities from other sources both in the neighborhood and farther away from the pile.

Wigner, E. P.

1943-03-01T23:59:59.000Z

434

Environmental continuous air monitor inlet with combined preseparator and virtual impactor  

DOE Patents (OSTI)

An inlet for an environmental air monitor is described wherein a pre-separator interfaces with ambient environment air and removes debris and insects commonly associated with high wind outdoors and a deflector plate in communication with incoming air from the pre-separator stage, that directs the air radially and downward uniformly into a plurality of accelerator jets located in a manifold of a virtual impactor, the manifold being cylindrical and having a top, a base, and a wall, with the plurality of accelerator jets being located in the top of the manifold and receiving the directed air and accelerating directed air, thereby creating jets of air penetrating into the manifold, where a major flow is deflected to the walls of the manifold and extracted through ports in the walls. A plurality of receiver nozzles are located in the base of the manifold coaxial with the accelerator jets, and a plurality of matching flow restrictor elements are located in the plurality of receiver nozzles for balancing and equalizing the total minor flow among all the plurality of receiver nozzles, through which a lower, fractional flow extracts large particle constituents of the air for collection on a sample filter after passing through the plurality of receiver nozzles and the plurality of matching flow restrictor elements.

Rodgers, John C. (Santa Fe, NM)

2007-06-19T23:59:59.000Z

435

NETL: Oil & Natural Gas Projects  

NLE Websites -- All DOE Office Websites (Extended Search)

Supercement for Annular Seal and Long-term Integrity in Deep, Hot Wells Supercement for Annular Seal and Long-term Integrity in Deep, Hot Wells DE-FC26-03NT41836 Goal: The goal of the project is to develop a supercement capable of sealing the annuli of and providing long-term integrity in deep, hot wells. Performers CSI Technologies, LLC , Houston, TX Argonne National Laboratory, Argonne, IL Results Phase I work involved a literature search on cements and evaluation of Portland and non-Portland cement systems and various formulations within these systems. Laboratory work involved more than 1,100 tests on 169 different formulations. Baseline testing established a foundation for comparison. Conventional and unconventional mechanical tests were conducted, and many systems were tested at high temperatures. From this work six candidate systems comprising some 10 formulas were recommended for further analysis in Phase II: reduced water systems, magnesium oxide, molybdenum trioxide, fibers, epoxy (resins), and graded particle systems.

436

Downward two-phase flow effects in heat-loss and pressure-drop modeling of steam injection wells  

SciTech Connect

Modelling of the pressure drop and heat loss in steam injection wells has undergone a gradual evolution since the heavy interest in enhanced oil recovery by steam injection in the mid-60's. After briefly reviewing the evolution of steam models this paper presents a model which advances the state-of-the-art of steam modelling. The main advance presented in this paper is modelling the effects of the various flow regimens that occur during steam injection. The paper describes the formulation of a two-phase downward vertical flow pressure drop model which is not limited by the ''no-slip'' homogeneous flow assumptions in most previously published models. By using different correlations for mist, bubble, and slug flow, improved pressure drop calculations result, which in turn improve temperature predictions. The paper describes how the model handles temperature predictions differently in the single and two-phase steam flow situations. The paper also describes special features in the model to account for layered soil properties, soil dry out, cyclic injection, coupling heat losses, and reflux boiling in wet annuli. Two examples problems are presented which illustrate some of these features.

Galate, J.W.; Mitchell, R.F.

1985-03-01T23:59:59.000Z

437

Countercurrent flow limited (CCFL) heat flux in the high flux isotope reactor (HFIR) fuel element  

SciTech Connect

The countercurrent flow (CCF) performance in the fuel element region of the HFIR is examined experimentally and theoretically. The fuel element consists of two concentric annuli filled with aluminum clad fuel plates of 1.27 mm thickness separated by 1.27 mm flow channels. The plates are curved as they go radially outward to accomplish constant flow channel width and constant metal-to-coolant ratio. A full-scale HFIR fuel element mock-up is studied in an adiabatic air-water CCF experiment. A review of CCF models for narrow channels is presented along with the treatment of CCFs in system of parallel channels. The experimental results are related to the existing models and a mechanistic model for the annular'' CCF in a narrow channel is developed that captures the data trends well. The results of the experiment are used to calculate the CCFL heat flux of the HFIR fuel assembly. It was determined that the HFIR fuel assembly can reject 0.62 Mw of thermal power in the CCFL situation. 31 refs., 17 figs.

Ruggles, A.E.

1990-10-12T23:59:59.000Z

438

Expansion-contraction cycles for cement optimized as a function of additives  

SciTech Connect

An experimental study was carried out to investigate the addition of specific additives to cement in order to eliminate the micro-fractures and micro-annuli that cause gas migration. The experiments performed monitored the change in the cement slurry pressure during the setting of the cement. During the setting period of the cement, two time cycles of cement expansion and contraction were observed. This is due to the individual contributions of each part of the cement mixture. To obtain the optimum tightness of the cement, final optimum concentrations of the additives were obtained experimentally, where the cyclic pressure behavior of the cement was optimized for the best final cement results. By utilizing the correct amount of Anchorage Clay, XC-Polymer, Ironite Scavenger, Ultrafine cement and Synthetic Rubber powder in a class G mixture at a given temperature and confining pressure, an impermeable cement mixture can be obtained. The correct amount of Synthetic Rubber used for cyclic pressure reduction is a function of cement setting temperature and pressure as well as the elastic properties of the rubber. By using laboratory testing at different pressure and temperature with different rubber concentrations and elastic properties, it is estimated that the entire annulus can have an impermeable cement from surface to total depth. The difference in temperature and pressure with depth dictates the concentration and elastic properties of the rubber as the required expansion and contraction changes with depth.

Talabani, S.; Hareland, G. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States)

1995-12-31T23:59:59.000Z

439

Gas Density Fluctuations in the Perseus Cluster: Clumping Factor and Velocity Power Spectrum  

E-Print Network (OSTI)

X-ray surface brightness fluctuations in the core of the Perseus Cluster are analyzed, using deep observations with the Chandra observatory. The amplitude of gas density fluctuations on different scales is measured in a set of radial annuli. It varies from 8 to 12 per cent on scales of ~10-30 kpc within radii of 30-160 kpc from the cluster center and from 9 to 7 per cent on scales of ~20-30 kpc in an outer, 60-220 kpc annulus. Using a statistical linear relation between the observed amplitude of density fluctuations and predicted velocity, the characteristic velocity of gas motions on each scale is calculated. The typical amplitudes of the velocity outside the central 30 kpc region are 90-140 km/s on ~20-30 kpc scales and 70-100 km/s on smaller scales ~7-10 kpc. The velocity power spectrum is consistent with cascade of turbulence and its slope is in a broad agreement with the slope for canonical Kolmogorov turbulence. The gas clumping factor estimated from the power spectrum of the density fluctuations is low...

Zhuravleva, I; Arevalo, P; Schekochihin, A A; Allen, S W; Fabian, A C; Forman, W R; Sanders, J S; Simionescu, A; Sunyaev, R; Vikhlinin, A; Werner, N

2015-01-01T23:59:59.000Z

440

RECENT PROGRESS IN DOE WASTE TANK CLOSURE  

SciTech Connect

The USDOE complex currently has over 330 underground storage tanks that have been used to process and store radioactive waste generated from the production of weapons materials. These tanks contain over 380 million liters of high-level and low-level radioactive waste. The waste consists of radioactively contaminated sludge, supernate, salt cake or calcine. Most of the waste exists at four USDOE locations, the Hanford Site, the Savannah River Site, the Idaho Nuclear Technology and Engineering Center and the West Valley Demonstration Project. A summary of the DOE tank closure activities was first issued in 2001. Since then, regulatory changes have taken place that affect some of the sites and considerable progress has been made in closing tanks. This paper presents an overview of the current regulatory changes and drivers and a summary of the progress in tank closures at the various sites over the intervening six years. A number of areas are addressed including closure strategies, characterization of bulk waste and residual heel material, waste removal technologies for bulk waste, heel residuals and annuli, tank fill materials, closure system modeling and performance assessment programs, lessons learned, and external reviews.

Langton, C

2008-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Distributed resonance self-shielding using the equivalence principle  

SciTech Connect

This paper presents an extension of the equivalence principle to allow distributed resonance self-shielding in a multi-region fuel configuration. Rational expansion of fuel-to-fuel collision probability is applied in order to establish equivalence between the actual fuel configuration and a homogeneous mixture of hydrogen and resonant absorber, which is a commonly used model to calculate library tables of resonance integrals. The main steps in derivation are given along with the basic physics assumptions on which the presented approach relies. The method has been implemented in the lattice code WIMS-AECL and routinely used for calculation of CANDU-type reactor lattices. Its capabilities are illustrated by comparison of WIMS-AECL and MCNP results of {sup 238}U resonance capture in a CANDU lattice cell. In order to determine optimal rational expansion of fuel-to-fuel collision probability, the calculations were carried out by varying the number of rational terms from 1 to 6. The results show that 4 terms are sufficient. The further increase of the number of terms affects the computing time, while the impact on accuracy is negligible. To illustrate the convergence of the results, the fuel subdivision is gradually refined varying the number of fuel pin subdivisions from 1 to 32 equal-area annuli. The results show very good agreement with the reference MCNP calculation. (authors)

Altiparmakov, D. [Atomic Energy of Canada Limited, Chalk River Laboratories, Chalk River, ON K0J 1J0 (Canada)

2012-07-01T23:59:59.000Z

442

LBNL Windows & Daylighting Software -- WINDOW  

NLE Websites -- All DOE Office Websites (Extended Search)

WINDOW WINDOW NFRC Certification Version Release Version Beta Version WINDOW 6.3 (For NFRC Certification and modeling Complex Glazing Systems) WINDOW 7.1 For modeling vacuum glazing, deflected glass, vertical venetian blinds and perforated screens WINDOW 7.2 For modeling Cellular Shades, in addition to vacuum glazing, deflected glass, vertical venetian blinds and perforated screens Download WINDOW 6.3 (for NFRC Certification and complex glazing systems) Download WINDOW 7.1 Download WINDOW 7.2 Knowledge Base (Check here first if you are experiencing a problem with the software) Knowledge Base (Check here first if you are experiencing a problem with the software) Knowledge Base (Check here first if you are experiencing a problem with the software) New Features

443

3D printing rises to the occasion | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Features Features 2014 2013 2012 2011 2010 News Home | ORNL | News | Features | 2013 SHARE 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 produced by an Arcam 3D printer. This detailed "calibration" part illustrates some of the versatility of 3D printing. Photo: Jason Richards (hi-res image) Things have come a long way since the mid-1980s when 3D Systems cofounder Chuck Hull worked out the technology to print objects in three dimensions, one very thin layer at a time. Hull called his new technology "stereolithography." In it, a guided beam of ultraviolet light is focused on a vat of liquid polymer, solidifying areas where it hits. When one layer is complete, the

444

LBNL Windows & Daylighting Software -- WINDOW Documentation  

NLE Websites -- All DOE Office Websites (Extended Search)

2 2 (7.2.29 -- December 29 2013) Release Notes Updated: 12/29/13 If you find bugs, or have comments about this version, please do not hesitate to send an email to WINDOWHelp@lbl.gov to report your findings. Getting feedback from users is how we improve the program. WINDOW 7.2.29 (December 29, 2013) Program Changes Glazing System Shading System Details For shading system in a Glazing System Library construction, the emittances, conductance and TIR are not displayed, as they are only available after a calculation has been completed. Perforated Screens An input value for "Effective Openness Factor" has been added to the Shading Layer Library for perforated screens. At a future date, we will update the program to calculate this value automatically.

445

Flameless heat generator  

SciTech Connect

A heating device generates heat by working a liquid in a closed container with a rotating stack of finely perforate square plates and recovering the heat from the thus heated liquid. In one embodiment a stack of a multiplicity of flat square plates radially offset one from another is rotated in an oil bath in a container under an inner perforate non-rotating cover over which is a similar non-rotating cover that is imperforate. The thermal energy developed through the mechanical working of the liquid is transferred to the main liquid bath and is then removed, as for example, by circulating air or a liquid around the outside of the container with the thus heated air or liquid being used to heat a house or the like.

Leary, C. L.; Leary, G. C.

1983-12-13T23:59:59.000Z

446

Control in Probabilistic Boolean Networks  

E-Print Network (OSTI)

beers rece?tly intr&&dnced as a rule-l&ascd pur;?ligm fo?' nodeliug gene regulatory?etworks. Such n& two&ks provide a convenient tool f&&r st?dyiug ir&teracl, ious b&stwee? &liff'exe?t g& ucs while allowiug for uncertai?ty iu the kuowlc&lg&& &&I... the scqucucc of co?trol actions th &t minimize & give? perfor&?ance iud&'x &&ve&' a fi&?te nu?&her olsteps. The p&occdu&e is based on the theory of controlled hi?rkov chains sud &nak&. s use of the classical technique of Dyna&ni&& Progra&nming, The &hoice...

Choudhary, Ashish

2012-06-07T23:59:59.000Z

447

Transpiration purged optical probe  

DOE Patents (OSTI)

An optical apparatus for clearly viewing the interior of a containment vessel by applying a transpiration fluid to a volume directly in front of the external surface of the optical element of the optical apparatus. The fluid is provided by an external source and transported by means of an annular tube to a capped end region where the inner tube is perforated. The perforation allows the fluid to stream axially towards the center of the inner tube and then axially away from an optical element which is positioned in the inner tube just prior to the porous sleeve. This arrangement draws any contaminants away from the optical element keeping it free of contaminants. In one of several embodiments, the optical element can be a lens, a viewing port or a laser, and the external source can provide a transpiration fluid having either steady properties or time varying properties.

2004-01-06T23:59:59.000Z

448

Method for fabricating light weight carbon-bonded carbon fiber composites  

DOE Patents (OSTI)

Ultralight carbon-bonded carbon fiber composites of densities in the range of about 0.04 to 0.10 grams per cubic centimeter are fabricated by forming an aqueous slurry of carbonaceous fibers which include carbonized fibers and 0-50 weight percent fugitive fibers and a particulate thermosetting resin precursor. The slurry is brought into contact with a perforated mandrel and the water is drained from the slurry through the perforations at a controlled flow rate of about 0.03 to 0.30 liters per minutes per square inch of mandrel surface. The deposited billet of fibers and resin precursor is heated to cure the resin precursor to bind the fibers together, removed from the mandrel, and then the resin and fugitive fibers, if any, are carbonized.

Wrenn, Jr., George E. (Clinton, TN); Abbatiello, Leonard A. (Oak Ridge, TN); Lewis, Jr., John (Oak Ridge, TN)

1989-01-01T23:59:59.000Z

449

Conclusions of the Capstone Depleted Uranium Aerosol Characterization and Risk Assessment Study  

SciTech Connect

The rationale for the Capstone Depleted Uranium (DU) Aerosol Characterization and Risk Assessment Program and its results and applications have been examined in the previous 13 articles of this special issue. This paper summarizes the results and discusses its successes and lessons learned. The robust data from the Capstone DU Aerosol Study have provided a sound basis for assessing the inhalation exposure to DU aerosols and the dose and risk to personnel in combat vehicles at the time of perforation and to those entering immediately after perforation. The Human Health Risk Assessment provided a technically sound process for evaluating chemical and radiological doses and risks from DU aerosol exposure using well-accepted biokinetic and dosimetric models innovatively applied. An independent review of the study process and results is summarized, and recommendations for possible avenues of future study by the authors and by other major reviews of DU health hazards are provided.

Parkhurst, MaryAnn; Guilmette, Raymond A.

2009-02-26T23:59:59.000Z

450

Method for improved gas-solids separation  

DOE Patents (OSTI)

Methods are disclosed for the removal of particulate solids from a gas stream at high separation efficiency, including the removal of submicron size particles. The apparatus includes a cyclone separator type of device which contains an axially mounted perforated cylindrical hollow rotor. The rotor is rotated at high velocity in the same direction as the flow of an input particle-laden gas stream to thereby cause enhanced separation of particulate matter from the gas stream in the cylindrical annular space between the rotor and the sidewall of the cyclone vessel. Substantially particle-free gas passes through the perforated surface of the spinning rotor and into the hollow rotor, from where it is discharged out of the top of the apparatus. Separated particulates are removed from the bottom of the vessel. 4 figs.

Kusik, C.L.; He, B.X.

1990-11-13T23:59:59.000Z

451

Modular, multi-level groundwater sampler  

DOE Patents (OSTI)

Apparatus for taking a multiple of samples of groundwater or pressure measurements from a well simultaneously. The apparatus comprises a series of chambers arranged in an axial array, each of which is dimensioned to fit into a perforated well casing and leave a small gap between the well casing and the exterior of the chamber. Seals at each end of the container define the limits to the axial portion of the well to be sampled. A submersible pump in each chamber pumps the groundwater that passes through the well casing perforations into the gap from the gap to the surface for analysis. The power lines and hoses for the chambers farther down the array pass through each chamber above them in the array. The seals are solid, water-proof, non-reactive, resilient disks supported to engage the inside surface of the well casing. Because of the modular design, the apparatus provides flexibility for use in a variety of well configurations.

Nichols, Ralph L. (812 Plantation Point Dr., N. Augusta, SC 29841); Widdowson, Mark A. (4204 Havana Ct., Columbia, SC 29206); Mullinex, Harry (10 Cardross La., Columbia, SC 29209); Orne, William H. (12 Martha Ct., Sumter, SC 29150); Looney, Brian B. (1135 Ridgemont Dr., Aiken, SC 29803)

1994-01-01T23:59:59.000Z

452

Microgravity Flow Regime Transition Modeling  

E-Print Network (OSTI)

apparatus have been used in past flow regime mapping experiments such as Venturi, perforated pipe, annular, and t-junction mixers. The mixing apparatus used in a particular experiment determines the bubble size distribution at the inlet... pressure of 80 kPa was reported, however, the temperature was not. The orientation and location of the test section with respect to the aircraft are unknown. The mixing apparatus used in the experiment was a Venturi mixer. This data set does...

Shephard, Adam M.

2010-07-14T23:59:59.000Z

453

Radiofrequency Guide Wire Recanalization of Venous Occlusions in Patients with Malignant Superior Vena Cava Syndrome  

SciTech Connect

Fibrotic central venous occlusions in patients with thoracic malignancy and prior radiotherapy can be impassable with standard catheters and wires, including the trailing or stiff end of a hydrophilic wire. We report two patients with superior vena cava syndrome in whom we successfully utilized a radiofrequency guide wire (PowerWire, Baylis Medical, Montreal, Quebec, Canada) to perforate through the occlusion and recanalize the occluded segment to alleviate symptoms.

Davis, Robert M.; David, Elizabeth; Pugash, Robyn A.; Annamalai, Ganesan, E-mail: ganesan.annamalai@sunnybrook.ca [Sunnybrook Health Sciences Centre, Department of Interventional Radiology (Canada)

2012-06-15T23:59:59.000Z

454

The role of patient experience surveys in quality assurance and improvement: a focus group study in English general practice.  

E-Print Network (OSTI)

, which included 48 codes grouped loosely into headings including validity of surveys, interpretation of survey feedback, organizational changes and perfor- mance comparison. Our coding framework went through a process of application, discus- sion... not always fulfilled because many GPs worked part-time. Practice staff felt that patients had a role to play in smooth and efficient functioning of primary care services. Staff spoke about increasing patient accountability and engaging patients...

Boiko, Olga; Campbell, John L.; Elmore, Natasha; Davey, Antoinette F.; Roland, Martin; Burt, Jenni

2014-11-04T23:59:59.000Z

455

Immediate versus Delayed IUD Insertion after Uterine Aspiration  

Science Journals Connector (OSTI)

...continued use of the IUD, removal (and reason for removal), reinsertion after expulsion or removal, and adverse events, including perforation, pelvic infection, and subsequent unintended pregnancy. All analyses were performed in the intention-to-treat population. Additional analyses were restricted to... This trial showed that, as compared with delayed placement, immediate placement of an IUD after uterine aspiration resulted in slightly higher but statistically noninferior rates of expulsion, similar rates of other complications, and higher rates of IUD use at 6 months.

Bednarek P.H.; Creinin M.D.; Reeves M.F.

2011-06-09T23:59:59.000Z

456

Inhalation and Ingestion Intakes with Associated Dose Estimates for Level II and Level III Personnel Using Capstone Study Data  

SciTech Connect

Depleted uranium (DU) intake rates and subsequent dose rates were estimated for personnel entering armored combat vehicles perforated with DU penetrators (level II and level III personnel) using data generated during the Capstone Depleted Uranium (DU) Aerosol Study. Inhalation intake rates and associated dose rates were estimated from cascade impactors worn by sample recovery personnel and from cascade impactors that served as area monitors. Ingestion intake rates and associated dose rates were estimated from cotton gloves worn by sample recovery personnel and from wipe test samples from the interior of vehicles perforated with large caliber DU munitions. The mean DU inhalation intake rate for level II personnel ranged from 0.447 mg h-1 based on breathing zone monitor data (in and around a perforated vehicle) to 14.5 mg h-1 based on area monitor data (in a perforated vehicle). The mean DU ingestion intake rate for level II ranged from 4.8 mg h-1 to 38.9 mg h-1 based on the wipe test data including surface to glove transfer factors derived from the Capstone data. Based on glove contamination data, the mean DU ingestion intake rates for level II and level III personnel were 10.6 mg h-1 was and 1.78 mg h-1, respectively. Effective dose rates and peak kidney uranium concentration rates were calculated based on the intake rates. The peak kidney uranium concentration rate cannot be multiplied by the total exposure duration when multiple intakes occur because uranium will clear from the kidney between the exposures.

Szrom, Fran; Falo, Gerald A.; Lodde, Gordon M.; Parkhurst, MaryAnn; Daxon, Eric G.

2009-03-01T23:59:59.000Z

457

Geothermal-well completions: a survey and technical evaluation of existing equipment and needs  

SciTech Connect

The geothermal environment and associated well completion problems are reviewed. Existing well completion equipment is surveyed and limitations are identified. A technical evaluation of selected completion equipment is presented. The technical evaluation concentrates on well cementing equipment and identifies potential failure mechanisms which limit the effectiveness of these tools. Equipment employed in sand control, perforating, and corrosion control are identified as potential subjects for future technical evaluation.

Nicholson, J.E.; Snyder, R.E.

1982-07-01T23:59:59.000Z

458

Evaluation of massive hydraulic fracturing experiments in the Devonian Shales in Lincoln County, West Virginia  

E-Print Network (OSTI)

perfor- mance. The type curves that have been generated have qualitatively shown that the fractured wells are clear'ly more stimulated than the surrounding shot wells, Fracture treatment simulation indicates that treatments pumped in the MHF wells... Optimal Stimulation Design Per Zone Simulated Reservoir Properties Economic Production Forecasts 64 68 70 15 Economic Analysis Results Reservoir Case 72 LIST OF FIGURES FIGURES 10 12 13 15 16 17 MHF Well Location In Lincoln County, WV MHF...

Holgate, Karen Elaine

2012-06-07T23:59:59.000Z

459

Electrochemical evaluation of LiCoO2 synthesized by decomposition and intercalation of hydroxides  

E-Print Network (OSTI)

in commercial lithi- um-ion battery manufacturing [4±6]. Synthesis of LiCoO2 is typically carried out by a solid-state March 1998; accepted in revised form 19 May 1998 LiCoO2 has been synthesized by a solid-state synthesis the electrochemical perfor- mance. In a previous paper [13], we reported a new solid- state reaction method that can

Sadoway, Donald Robert

460

SPECIAL ISSUE Changes in the chemistry of shallow groundwater related  

E-Print Network (OSTI)

samples of water were collected from 10 shallow monitoring wells (1.5 or 3.0 m deep) installed 1­6 m from through a perforated pipe placed horizontally 2­2.3 m deep during July 9­August 7, 2008 at the MSU- ZERT to the subsurface storage and potential leakage of CO2. As part of this multidisciplinary research project, 80

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

The recovery of oil from carbonate reservoirs by fluid injection  

E-Print Network (OSTI)

Hole 70 Neasured and Calculated Productivities Obtained on Wells Completed Through Perforations 39 Cumulative Oil Recovery Versus Total Water and Oil Throughf low for Stratified Reservoirs- lj. O Cumulative Oil Recovery Versus Total Water and Oil... for Field A 12, Cumulative Oil Recovery Versus Total Water and Oil Throughflow for Field B 13, -20, Permeability Distribution Plots $5-52 The object of this project was to study the extent of the variations of the permeability in carbonate reservoirs...

Coleman, Dwayne Marvin

2012-06-07T23:59:59.000Z

462

Advanced hybrid particulate collector and method of operation  

DOE Patents (OSTI)

A device and method for controlling particulate air pollutants of the present invention combines filtration and electrostatic collection devices. The invention includes a chamber housing a plurality of rows of filter elements. Between the rows of filter elements are rows of high voltage discharge electrodes. Between the rows of discharge electrodes and the rows of filter elements are grounded perforated plates for creating electrostatic precipitation zones.

Miller, Stanley J. (Grand Forks, ND)

2003-04-08T23:59:59.000Z

463

Chip breaking system for automated machine tool  

DOE Patents (OSTI)

The invention is a rotary selectively directional valve assembly for use in an automated turret lathe for directing a stream of high pressure liquid machining coolant to the interface of a machine tool and workpiece for breaking up ribbon-shaped chips during the formation thereof so as to inhibit scratching or other marring of the machined surfaces by these ribbon-shaped chips. The valve assembly is provided by a manifold arrangement having a plurality of circumferentially spaced apart ports each coupled to a machine tool. The manifold is rotatable with the turret when the turret is positioned for alignment of a machine tool in a machining relationship with the workpiece. The manifold is connected to a non-rotational header having a single passageway therethrough which conveys the high pressure coolant to only the port in the manifold which is in registry with the tool disposed in a working relationship with the workpiece. To position the machine tools the turret is rotated and one of the tools is placed in a material-removing relationship of the workpiece. The passageway in the header and one of the ports in the manifold arrangement are then automatically aligned to supply the machining coolant to the machine tool workpiece interface for breaking up of the chips as well as cooling the tool and workpiece during the machining operation.

Arehart, Theodore A. (Clinton, TN); Carey, Donald O. (Oak Ridge, TN)

1987-01-01T23:59:59.000Z

464

Apparatus for improving gasoline comsumption, power and reducing emission pollutants of internal combustion engines  

SciTech Connect

This patent describes an apparatus for improving performance and reducing fuel comsumption and emission pollutants from an internal combustion gasoline engine. This apparatus consists of: 1.) an internal combustion gasoline engine having, in part, an intake manifold and an exhaust manifold where the exhaust manifold is modified to include a manifold exhaust port; 2.) a modified internal combustion engine carburetor connected to the intake manifold on the engine; 3.) a positive crankcase ventilation valve (PCV) which has an input port conventionally connected to the internal combustion engine and also has a PCV output port; 4.) an automobile fuel pump having an input connected to a conventional fuel tank and having a fuel pump output port; 5.) a thermic reactor; 6.) a thermic reactor air cleaner pneumatically connected to the clean air input port on the thermic reactor; 7.) a catalytic gas injector; 8.) a fuel regulator/restrictor consisting of a solid block having a fuel pump input port and a carburetor output port.

Piedrafita, R.

1986-02-18T23:59:59.000Z

465

An Hourly-Based Performance Comparison of an Integrated Micro-Structural  

NLE Websites -- All DOE Office Websites (Extended Search)

An Hourly-Based Performance Comparison of an Integrated Micro-Structural An Hourly-Based Performance Comparison of an Integrated Micro-Structural Perforated Shading Screen with Standard Shading Systems Title An Hourly-Based Performance Comparison of an Integrated Micro-Structural Perforated Shading Screen with Standard Shading Systems Publication Type Journal Article LBNL Report Number LBNL-5521E Year of Publication 2012 Authors Appelfeld, David, Andrew McNeil, and Svend Svendsen Journal Energy and Buildings Volume 50 Issue July 2012 Keywords building performance modelling, complex fenestration system, daylight, shading, solar gains Abstract This article evaluates the performance of an integrated micro structural perforated shading screen (MSPSS). Such a system maintains a visual connection with the outdoors while imitating the shading functionality of a venetian blind. Building energy consumption is strongly influenced by the solar gains and heat transfer through the transparent parts of the fenestration systems. MSPSS is angular-dependent shading device that provides an effective strategy in the control of daylight, solar gains and overheating through windows. The study focuses on using direct experimental methods to determine bi-directional transmittance properties of shading systems that are not included as standard shading options in readily available building performance simulation tools. The impact on the indoor environment, particularly temperature and daylight were investigated and compared to three other static complex fenestration systems. The bi-directional description of the systems was used throughout the article. The simulations were validated against outdoor measurements of solar and light transmittance.

466

Comparison between a spray column and a sieve tray column operating as liquid-liquid heat exchangers  

SciTech Connect

The performance of a spray column and a sieve tray column was compared as a liquid-liquid heat exchanger. In carrying out these studies a 15.2 cm (6.0 in.) diameter column, 183 cm (6.0 ft) tall was utilized. The performance of the spray column as a heat exchanger was shown to correlate with the model of Letan-Kehat which has as a basis that the heat transfer is dominated by the wakeshedding characteristics of the drops over much of the column length. This model defines several hydrodynamic zones along the column of which the wake formation zone at the bottom appears to have the most efficient heat transfer. The column was also operated with four perforated plates spaced two column diameters apart in order to take advantage of the wake formation zone heat transfer. The plates induce coalescence of the dispersed phase and reformation of the drops, and thus cause a repetition of the wake formation zone. It is shown that the overall volumetric heat transfer coefficient in a perforated plate column is increased by a minimum of eleven percent over that in a spray column. A hydrodynamic model that predicts the performance of a perforated plate column is suggested.

Keller, A.; Jacobs, H.R.; Boehm, R.F.

1980-12-01T23:59:59.000Z

467

Acoustic properties of plates with unevenly distributed macroperforations backed by woven meshes  

Science Journals Connector (OSTI)

A hybrid model describing the acoustic properties of plates with macroperforations that can be unevenly distributed on the plate surface and backed by woven or precision woven meshes with microscopic perforations is proposed. The plate perforations may be of circular or rectangular shapes. Since the perforated plate may not necessarily be considered as an equivalent fluid its impedance is calculated by the Maa model [Noise Control Eng. J. 29 7784 (1987)] whereas the Johnson-Champoux-Allard model [J. Appl. Phys. 70 19751979 (1991)] is used for the mesh considered as an equivalent fluid. A simple model for the elementary cell of the mesh structure is proposed in order to calculate parameters that can be considered as the thermal characteristic length ?? and the viscouscharacteristic length ?. An effective airflow resistivity is introduced to account for the increase of particle velocity through the mesh placed behind the carrying macroperforated plate and is used in the transfer matrix approach to obtain the impedance of the whole multilayer system. The hybrid model seems to represent a good approach of this multilayer system. The theoretical predictions are compared with experimental measurements.

Heidi Ruiz; Pedro Cobo; Thomas Dupont; Bruno Martin; Philippe Leclaire

2012-01-01T23:59:59.000Z

468

OneTouch 4.0 Scanned Documents  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

64 64 Prolect Information Project Titre: Optimization Project Area #2 I Date: I 612412013 DOl!Code: I Contractor Code: I Project lead: Sha~Nonnan Project overview The purpose of this project Is lo replace oorroded steel lines from 35 weDs with a 2· polypipe, bring the wells 1. Brief project desclipllon (Include back on production, route the production from 24 of them into T-3-34 Test Manifold I, and lnslal a line from anything that could impact the T-3-34 Test Manifold lo T-2-34 Production Manifold for shipment, picking up 11 additional weNs. This will enVJronmentj lnetease production approximately 30 barrels of oil per day (BOPO) and will have a 40 day payout at $80/bbl oil price. In addition, three tanks al well sites will be taken out of selVioe and the need lo truck that oil lo the

469

OneTouch 4.0 Scanned Documents  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

3 Rf..V I 3 Rf..V I Project Information Project Title: Optimization Project Area# 1 Date: 712212013 DOl!Code: Project Lead: Sharyl Norman Project Overview 1. Brief project description [include anything that could mpact the environment] 2. Legal location 3. Duration of the project 4. Major equipment to be used Contractor Code: The purpose of this project is to replace corroded steel lines from 35 wells with a 2" poly pipe, bring the wells back on production, route the production from 24 of them into T-3-34 Test Manifold I, and install a line from T-:>34 Test Manifold to T-2-34 Production Manifold for shipment, picking up 11 additional wells. This will increase production approximately 30 barrels of oil per day (BOPD) and will have a 40 day payout at $80/bbl

470

Injector having multiple fuel pegs  

DOE Patents (OSTI)

A fuel injector is provided, including a fuel injector body, a plurality of fuel vanes, and a plurality of fuel pegs. The injector body includes a manifold and an inlet. The manifold is configured for receiving fuel, and the inlet is configured for receiving air. The fuel vanes are located within the injector body and are positioned in a direction that is generally parallel with a longitudinal axis of the injector body to orient the air flowing from the inlet. The plurality of fuel pegs are fluidly connected to the manifold and are arranged within the plurality of fuel vanes. The plurality of fuel pegs are each spaced at a distance that is about equal between each of the plurality of fuel pegs.

Hadley, Mark Allan; Felling, David Kenton

2013-04-30T23:59:59.000Z

471

Topological crossovers in the forced folding of self-avoiding matter  

E-Print Network (OSTI)

We study the scaling properties of forced folding of thin materials of different geometry. The scaling relations implying the topological crossovers from the folding of threedimensional plates to the folding of two-dimensional sheets, and further to the packing of one-dimensional strings, are derived for elastic and plastic manifolds. These topological crossovers in the folding of plastic manifolds were observed in experiments with predominantly plastic aluminum strips of different geometry. Elasto-plastic materials, such as paper sheets during the (fast) folding under increasing confinement force, are expected to obey the scaling force-diameter relation derived for elastic manifolds. However, in experiments with paper strips of different geometry, we observed the crossover from packing of one-dimensional strings to folding two dimensional sheets only, because the fractal dimension of the set of folded elasto-plastic sheets is the thickness dependent due to the strain relaxation after a confinement force is withdrawn.

Alexander S. Balankin; Daniel Morales Matamoros; Ernesto Pineda Leon; Antonio Horta Rangel; Miguel Angel Martinez Cruz; Didier Samayoa Ochoa

2009-07-25T23:59:59.000Z

472

Liners for ion transport membrane systems  

SciTech Connect

Ion transport membrane system comprising (a) a pressure vessel comprising an interior, an exterior, an inlet, an inlet conduit, an outlet, and an outlet conduit; (b) a plurality of planar ion transport membrane modules disposed in the interior of the pressure vessel and arranged in series, each membrane module comprising mixed metal oxide ceramic material and having an interior region and an exterior region, wherein the inlet and the outlet of the pressure vessel are in flow communication with exterior regions of the membrane modules; (c) a gas manifold having an interior surface wherein the gas manifold is in flow communication with the interior region of each of the planar ion transport membrane modules and with the exterior of the pressure vessel; and (d) a liner disposed within any of the inlet conduit, the outlet conduit, and the interior surface of the gas manifold.

Carolan, Michael Francis (Allentown, PA); Miller, Christopher Francis (Macungie, PA)

2010-08-10T23:59:59.000Z

473

Removable check valve for use in a nuclear reactor  

DOE Patents (OSTI)

A removable check valve for interconnecting the discharge duct of a pump and an inlet coolant duct of a reactor core in a pool-type nuclear reactor. A manifold assembly is provided having an outer periphery affixed to and in fluid communication with the discharge duct of the pump and has an inner periphery having at least one opening therethrough. A housing containing a check valve is located within the inner periphery of the manifold. The upper end of the housing has an opening in alignment with the opening in the manifold assembly, and seals are provided above and below the openings. The lower end of the housing is adapted for fluid communication with the inlet duct of the reactor core.

Dunn, Charlton (Calabasas, CA); Gutzmann, Edward A. (Simi Valley, CA)

1988-01-01T23:59:59.000Z

474

Method and apparatus for determining two-phase flow in rock fracture  

DOE Patents (OSTI)

An improved method and apparatus as disclosed for measuring the permeability of multiple phases through a rock fracture. The improvement in the method comprises delivering the respective phases through manifolds to uniformly deliver and collect the respective phases to and from opposite edges of the rock fracture in a distributed manner across the edge of the fracture. The improved apparatus comprises first and second manifolds comprising bores extending within porous blocks parallel to the rock fracture for distributing and collecting the wetting phase to and from surfaces of the porous blocks, which respectively face the opposite edges of the rock fracture. The improved apparatus further comprises other manifolds in the form of plenums located adjacent the respective porous blocks for uniform delivery of the non-wetting phase to parallel grooves disposed on the respective surfaces of the porous blocks facing the opposite edges of the rock fracture and generally perpendicular to the rock fracture.

Persoff, Peter (Oakland, CA); Pruess, Karsten (Berkeley, CA); Myer, Larry (Benicia, CA)

1994-01-01T23:59:59.000Z

475

Casimir Pistons with General Boundary Conditions  

E-Print Network (OSTI)

In this work we analyze the Casimir energy and force for a scalar field endowed with general self-adjoint boundary conditions propagating in a higher dimensional piston configuration. The piston is constructed as a direct product $I\\times N$, with $I=[0,L]\\subset\\mathbb{R}$ and $N$ a smooth, compact Riemannian manifold with or without boundary. The study of the Casimir energy and force for this configuration is performed by employing the spectral zeta function regularization technique. The obtained analytic results depend explicitly on the spectral zeta function associated with the manifold $N$ and the parameters describing the general boundary conditions imposed. These results are then specialized to the case in which the manifold $N$ is a $d$-dimensional sphere.

Guglielmo Fucci

2014-10-16T23:59:59.000Z

476

Some Progress in Conformal Geometry  

E-Print Network (OSTI)

This is a survey paper of our current research on the theory of partial differential equations in conformal geometry. Our intention is to describe some of our current works in a rather brief and expository fashion. We are not giving a comprehensive survey on the subject and references cited here are not intended to be complete. We introduce a bubble tree structure to study the degeneration of a class of Yamabe metrics on Bach flat manifolds satisfying some global conformal bounds on compact manifolds of dimension 4. As applications, we establish a gap theorem, a finiteness theorem for diffeomorphism type for this class, and diameter bound of the $\\sigma_2$-metrics in a class of conformal 4-manifolds. For conformally compact Einstein metrics we introduce an eigenfunction compactification. As a consequence we obtain some topological constraints in terms of renormalized volumes.

Chang, Sun-Yung A; Yang, Paul

2007-01-01T23:59:59.000Z

477

Fermion Generations from "Apple-Shaped" Extra Dimensions  

E-Print Network (OSTI)

We examine the behavior of fermions in the presence of an internal compact 2-manifold which in one of the spherical angles exhibits a conical character with an obtuse angle. The extra manifold can be pictured as an apple-like surface i.e. a sphere with an extra "wedge" insert. Such a surface has conical singularities at north and south poles. It is shown that for this setup one can obtain, in four dimensions, three trapped massless fermion modes which differ from each other by having different values of angular momentum with respect to the internal 2-manifold. The extra angular momentum acts as the family label and these three massless modes are interpreted as the three generations of fundamental fermions.

Merab Gogberashvili; Pavle Midodashvili; Douglas Singleton

2007-08-13T23:59:59.000Z

478

Modelling suspended sediment in environmental turbulent fluids  

E-Print Network (OSTI)

Modelling sediment transport in environmental turbulent fluids is a challenge. This article develops a sound model of the lateral transport of suspended sediment in environmental fluid flows such as floods and tsunamis. The model is systematically derived from a 3D turbulence model based on the Smagorinski large eddy closure. Embedding the physical dynamics into a family of problems and analysing linear dynamics of the system, centre manifold theory indicates the existence of slow manifold parametrised by macroscale variables. Computer algebra then constructs the slow manifold in terms of fluid depth, depth-averaged lateral velocities, and suspended sediment concentration. The model includes the effects of sediment erosion, advection, dispersion, and also the interactions between the sediment and turbulent fluid flow. Vertical distributions of the velocity and concentration in steady flow agree with the established experimental data. Numerical simulations of the suspended sediment under large waves show that ...

Cao, Meng

2014-01-01T23:59:59.000Z

479

OneTouch 4.0 Scanned Documents  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5 5 Project lnfonnatlon Project Title: OptiTlizatlon Project# 3 Date: 712212013 DOE Code: Contractor Code: Project Lead: Sharyl Norman Project~ 1. Bnef proiect desaiptlon [include anything that could rnpact the environment] 2. Legal location 3. Duration of the project 4. Major equipment to be used The purpose of this project is to replace oorroded steel fines from 35 wells with a 2· polypipe, bring the wells back on production, route the production from 24 of them into T.J.34 Test Manifold I, and install a fine from T-3-34 Test Manifold to T-2-34 Production Manifold for shipment, picking up 11 additional wells. This will Increase production approximately 30 barrels of oil per day (BOPO) and wiU have a 40 day payout at S80lbbl oil price. In addition. three tanks at wen sites will be taken out of service and the need to truck that oil to the

480

High Specific Power, Direct Methanol Fuel Cell Stack  

NLE Websites -- All DOE Office Websites (Extended Search)

High Specific Power, Direct Methanol Fuel Cell Stack High Specific Power, Direct Methanol Fuel Cell Stack High Specific Power, Direct Methanol Fuel Cell Stack The present invention is a fuel cell stack including at least one direct methanol fuel cell. Available for thumbnail of Feynman Center (505) 665-9090 Email High Specific Power, Direct Methanol Fuel Cell Stack 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

Note: This page contains sample records for the topic "manifolds perforated annuli" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Geodesic Reduction via Frame Bundle Geometry  

E-Print Network (OSTI)

A manifold with an arbitrary affine connection is considered and the geodesic spray associated with the connection is studied in the presence of a Lie group action. In particular, results are obtained that provide insight into the structure of the reduced dynamics associated with the given invariant affine connection. The geometry of the frame bundle of the given manifold is used to provide an intrinsic description of the geodesic spray. A fundamental relationship between the geodesic spray, the tangent lift and the vertical lift of the symmetric product is obtained, which provides a key to understanding reduction in this formulation.

Ajit Bhand

2010-02-22T23:59:59.000Z

482

Ceramic membrane reactor with two reactant gases at different pressures  

DOE Patents (OSTI)

The invention is a ceramic membrane reactor for syngas production having a reaction chamber, an inlet in the reactor for natural gas intake, a plurality of oxygen permeating ceramic slabs inside the reaction chamber with each slab having a plurality of passages paralleling the gas flow for transporting air through the reaction chamber, a manifold affixed to one end of the reaction chamber for intake of air connected to the slabs, a second manifold affixed to the reactor for removing the oxygen depleted air, and an outlet in the reaction chamber for removing syngas.

Balachandran, Uthamalingam (Hinsdale, IL); Mieville, Rodney L. (Glen Ellyn, IL)

2001-01-01T23:59:59.000Z

483

Coupling of the model reduction technique with the lattice Boltzmann method for combustion simulations  

SciTech Connect

A new framework of simulation of reactive flows is proposed based on a coupling between accurate reduced reaction mechanism and the lattice Boltzmann representation of the flow phenomena. The model reduction is developed in the setting of slow invariant manifold construction, and the simplest lattice Boltzmann equation is used in order to work out the procedure of coupling of the reduced model with the flow solver. Practical details of constructing slow invariant manifolds of a reaction system under various thermodynamic conditions are reported. The proposed method is validated with the two-dimensional simulation of a premixed counterflow flame in the hydrogen-air mixture. (author)

Chiavazzo, Eliodoro [Aerothermochemistry and Combustion Systems Lab, ETH Zurich, 8092 Zurich (Switzerland); Department of Energetics, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Turin (Italy); Karlin, Iliya V. [Aerothermochemistry and Combustion Systems Lab, ETH Zurich, 8092 Zurich (Switzerland); School of Engineering Sciences, University of Southampton, SO17 1BJ Southampton (United Kingdom); Gorban, Alexander N. [Department of Mathematics, University of Leicester, LE1 7RH Leicester (United Kingdom); Boulouchos, Konstantinos [Aerothermochemistry and Combustion Systems Lab, ETH Zurich, 8092 Zurich (Switzerland)

2010-10-15T23:59:59.000Z

484

L^p Bernstein Inequalities and Radial Basis Function Approximation  

E-Print Network (OSTI)

on scattered data This dissertation follows the style of the Journal of Approximation Theory. 2 sites. F.J. Narcowich and J.D. Ward have made signi cant contributions to this eld studying approximation on compact manifolds where the data sites are allowed... on scattered data This dissertation follows the style of the Journal of Approximation Theory. 2 sites. F.J. Narcowich and J.D. Ward have made signi cant contributions to this eld studying approximation on compact manifolds where the data sites are allowed...

Ward, John P.

2012-10-19T23:59:59.000Z

485

Adiabatic theorems for generators of contracting evolutions  

E-Print Network (OSTI)

We develop an adiabatic theory for generators of contracting evolution on Banach spaces. This provides a uniform framework for a host of adiabatic theorems ranging from unitary quantum evolutions through quantum evolutions of open systems generated by Lindbladians all the way to classically driven stochastic systems. In all these cases the adiabatic evolution approximates, to lowest order, the natural notion of parallel transport in the manifold of instantaneous stationary states. The dynamics in the manifold of instantaneous stationary states and transversal to it have distinct characteristics: The former is irreversible and the latter is transient in a sense that we explain. Both the gapped and gapless cases are considered. Some applications are discussed.

J. E. Avron; M. Fraas; G. M. Graf; P. Grech

2012-06-04T23:59:59.000Z

486

Gas flow means for improving efficiency of exhaust hoods  

DOE Patents (OSTI)

Apparatus is described for inhibiting the flow of contaminants in an exhaust enclosure toward an individual located adjacent an opening into the exhaust enclosure by providing a gas flow toward a source of contaminants from a position in front of an individual to urge said contaminants away from the individual toward a gas exit port. The apparatus comprises a gas manifold which may be worn by a person as a vest. The manifold has a series of gas outlets on a front face thereof facing away from the individual and toward the contaminants to thereby provide a flow of gas from the front of the individual toward the contaminants. 15 figures.

Gadgil, A.J.

1994-01-11T23:59:59.000Z

487

Power-law Solutions from Heterotic Strings  

E-Print Network (OSTI)

In this paper we search for accelerating power-law and ekpyrotic solutions in heterotic string theory with NS-NS fluxes compactified on half-flat and generalized half-flat manifolds. We restrict our searches to the STZ sector of the theory and include linear order $\\alpha'$ corrections when looking for accelerating solutions. We find two ekpyrotic solutions in the case when the heterotic string theory is compactified on generalized half-flat manifolds. We do not find accelerating solutions in any of the models.

Tibra Ali; S. Shajidul Haque

2014-03-11T23:59:59.000Z

488

SOFC seal and cell thermal management  

SciTech Connect

The solid oxide fuel cell module includes a manifold, a plate, a cathode electrode, a fuel cell and an anode electrode. The manifold includes an air or oxygen inlet in communication with divergent passages above the periphery of the cell which combine to flow the air or oxygen radially or inwardly for reception in the center of the cathode flow field. The latter has interconnects providing circuitous cooling passages in a generally radial outward direction cooling the fuel cell and which interconnects are formed of different thermal conductivity materials for a preferential cooling.

Potnis, Shailesh Vijay (Neenah, WI); Rehg, Timothy Joseph (Huntington Beach, CA)

2011-05-17T23:59:59.000Z

489

On the Axioms of Topological Electromagnetism  

E-Print Network (OSTI)

The axioms of topological electromagnetism are refined by the introduction of the de Rham homology of k-vector fields on orientable manifolds and the use of Poincare duality in place of Hodge duality. The central problem of defining the electromagnetic constitutive law is elaborated upon in the linear and nonlinear cases. The manner by which the spacetime metric might follow from the constitutive law is examined in the linear case. The possibility that the intersection form of the spacetime manifold might play a role in defining a topological basis for the constitutive law is explored. The manner by which wave motion might follow from the electromagnetic structure is also discussed.

D. H. Delphenich

2003-12-14T23:59:59.000Z

490

GEOTEMP2. Advanced Wellbore Thermal Simulator  

SciTech Connect

GEOTEMP2, which is based on the earlier GEOTEMP program, is a wellbore thermal simulator designed for geothermal well drilling and production applications. The code treats natural and forced convection and conduction within the wellbore and heat conduction within the surrounding rock matrix. A variety of well operations can be modeled including injection, production, forward and reverse circulation with gas or liquid, gas or liquid drilling, and two-phase steam injection and production. Well completion with several different casing sizes and cement intervals can be modeled. The code allows variables, such as flow rate, to change with time enabling a realistic treatment of well operations. Provision is made in the flow equations to allow the flow areas of the tubing to vary with depth in the wellbore. Multiple liquids can exist in GEOTEMP2 simulations. Liquid interfaces are tracked through the tubing and annulus as one liquid displaces another. GEOTEMP2, however, does not attempt to simulate displacement of liquids with a gas or two-phase steam or vice versa. This means that it is not possible to simulate an operation where the type of drilling fluid changes, e.g. mud going to air. GEOTEMP2 was designed primarily for use in predicting the behavior of geothermal wells, but it is flexible enough to handle many typical drilling, production, and injection problems in the oil industry as well. However, GEOTEMP2 does not allow the modeling of gas-filled annuli in production or injection problems. In gas or mist drilling, no radiation losses are included in the energy balance. No attempt is made to model flow in the formation. Average execution time is 50 CP seconds on a CDC CYBER170. This edition of GEOTEMP2 is designated as Version 2.0 by the contributors.

Mitchell, R.F. [Enertech Engineering and Research Co., Houston, TX (United States); Monday, L.A.; Duda, L.E. [Sandia National Labs., Albuquerque, NM (United States)

1984-11-01T23:59:59.000Z

491

Statoil perspectives AMOS kick-off seminar 29.05.2013  

E-Print Network (OSTI)

adding value through selective midstream positions Attractive outlook for upstream oil and gas 2013-lab in Norway: Basin for full scale testing of ?sgard compression module 2013-05-3018 #12;Oil storage Gas compression Gas, oil, produced water separation Power distribution and control Manifold Sea water injection

Nørvåg, Kjetil

492

Isothermal and thermal cycling oxidation of hot-dip aluminide coating on flake/spheroidal graphite cast iron  

E-Print Network (OSTI)

as engineering materials in high temperature applications, such as furnace parts, turbocharger housings and exhaust manifolds that require high-temperature oxidation resistance and mechanical strength [1 been aluminized by hot-dipping, and then their oxidation and thermal fatigue resistance were evaluated

Volinsky, Alex A.

493

A Root-Expressed l-Phenylalanine:4-Hydroxyphenylpyruvate Aminotransferase Is Required for Tropane Alkaloid Biosynthesis in Atropa belladonna  

Science Journals Connector (OSTI)

...Argon was used as the collision gas for collision-induced dissociation at a manifold pressure of 2 103 mbar, with collision energies and source cone potentials optimized for each metabolite using Waters QuanOptimize software. A series of calibration standards...

Matthew A. Bedewitz; Elsa Góngora-Castillo; Joseph B. Uebler; Eliana Gonzales-Vigil; Krystle E. Wiegert-Rininger; Kevin L. Childs; John P. Hamilton; Brieanne Vaillancourt; Yun-Soo Yeo; Joseph Chappell; Dean DellaPenna; A. Daniel Jones; C. Robin Buell; Cornelius S. Barry

2014-09-16T23:59:59.000Z

494

Metric approach for sound propagation in nematic liquid crystals  

E-Print Network (OSTI)

In the eikonal approach, we describe sound propagation near to topological defects of nematic liquid crystal as geodesics of a non-euclidian manifold endowed with an effective metric tensor. The relation between the acoustics of the medium and this geometrical description is given by Fermat's principle. We calculate the ray trajectories and propose a diffraction experiment to retrieve informations about the elastic constants.

E. Pereira; S. Fumeron; F. Moraes

2013-01-21T23:59:59.000Z

495

TRANSVERSELY AFFINE FOLIATIONS ON PROJECTIVE GAEL COUSIN AND JORGE VITORIO PEREIRA  

E-Print Network (OSTI)

TRANSVERSELY AFFINE FOLIATIONS ON PROJECTIVE MANIFOLDS GA¨EL COUSIN AND JORGE VIT´ORIO PEREIRA. Jorge Vit´orio Pereira is partially supported by CNPq-Brazil. During preparation of this work, Ga¨el Cousin was a fellow of CNPq-Brazil. 1 #12;2 G. COUSIN AND J.V. PEREIRA We do not know if the hypothesis

Pereira, Jorge Vitório

496

3.3 An Autonomous Inexpensive Robust CO Analyzer (AIRCOA)2 B. Stephens, A. Watt and G.Maclean  

E-Print Network (OSTI)

, leaks to ambient air, leaks of calibration gas through solenoid valves, and modification of CO mixing ratio by the drying system or plastic components (see Table 1). 2 2 2 2 3.3.2 Instrument Design As shown Engineering, CF and MLS series) before reaching a manifold of solenoid valves (Numatech, TM10 series

Stephens, Britton B.

497

Prof. L. H. Bailey  

Science Journals Connector (OSTI)

... Christmas evening, 1954, death came to one of America's great men, the venerable Liberty Hyde Bailey, then ninety-six years of age. Most great men can be classified ... the profession or field of activity whereby they achieved their greatness ; not so with Liberty Hyde Bailey, for his greatness is due to his manifold contributions produced almost concurrently ...

G. H. M. LAWRENCE

1955-03-12T23:59:59.000Z

498

Singular HermitianEinstein Monopoles on the Product of a Circle and a Riemann Surface  

Science Journals Connector (OSTI)

......one has Now lift this to B 4...take upstairs a four-ball around the singular point, mapping to...gauge theoretic point of view. In...three-manifold. Fix N points p 1, , p N M...that a local lift from the three-ball to the four-ball using......

Benoit Charbonneau; Jacques Hurtubise

2011-01-01T23:59:59.000Z

499

International Journal of Mathematics Vol. 20, No. 5 (2009) 573604  

E-Print Network (OSTI)

�Witten projection map from the point of view of Fredholm map degrees. Keywords: Lifted real structure; real Seiberg. In outline, the real version starts with a K�ahler four-manifold with anti-holomorphic involution (a real structure). Then one would like to understand the lifted action on the Seiberg�Witten moduli space as well

Wang, Shuguang

500

HIDDEN SYMMETRIES OF CYCLIC BRANCHED COVERINGS OF 2-BRIDGE KNOTS  

E-Print Network (OSTI)

HIDDEN SYMMETRIES OF CYCLIC BRANCHED COVERINGS OF 2-BRIDGE KNOTS MARCO RENI AND ANDREI VESNIN hyperbolic 3-manifolds Mn(K), which are n- fold cyclic branched coverings of 2-bridge knots K. We show the symmetry groups of knots and links (see [BZ], [Ka]). Particularly, the class of 2-bridge knots