Powered by Deep Web Technologies
Note: This page contains sample records for the topic "ring compression testing" 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.


1

Used Fuel Disposition Campaign Phase I Ring Compression Testing...  

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

Phase I Ring Compression Testing of High Burnup Cladding Used Fuel Disposition Campaign Phase I Ring Compression Testing of High Burnup Cladding The purpose of ring compression...

2

Used Fuel Disposition Campaign Phase I Ring Compression Testing of High  

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

Phase I Ring Compression Testing of Phase I Ring Compression Testing of High Burnup Cladding Used Fuel Disposition Campaign Phase I Ring Compression Testing of High Burnup Cladding The purpose of ring compression testing is to generate data to support the development of the technical basis for extended storage and transportation of high-burnup fuel. This report highlights the results of completed Phase I testing of high-burnup M5® cladding and the revised three-year test plan. The goal of the ring compression testing is to identify process conditions that would minimize radial-hydride formation and the corresponding DBTT of high-burnup fuel cladding and to generate data and models to support the development of the technical basis for extended storage and transportation of high-burnup fuel.

3

Joining mechanism with stem tension and interlocked compression ring  

DOE Patents (OSTI)

A stem (34) extends from a second part (30) through a hole (28) in a first part (22). A groove (38) around the stem provides a non-threaded contact surface (42) for a ring element (44) around the stem. The ring element exerts an inward force against the non-threaded contact surface at an angle that creates axial tension (T) in the stem, pulling the second part against the first part. The ring element is formed of a material that shrinks relative to the stem by sintering. The ring element may include a split collet (44C) that fits partly into the groove, and a compression ring (44E) around the collet. The non-threaded contact surface and a mating distal surface (48) of the ring element may have conic geometries (64). After shrinkage, the ring element is locked onto the stem.

James, Allister W.; Morrison, Jay A.

2012-09-04T23:59:59.000Z

4

Butyl rubber O-ring seals: Revision of test procedures for stockpile materials  

SciTech Connect

Extensive testing showed little correlation between test slab and O-ring performance. New procedures, comparable to those used with the traditional test slabs, were defined for hardness, compression set, and tensile property testing on sacrificial O-ring specimens. Changes in target performance values were made as needed and were, in one case, tightened to reflect the O-ring performance data. An additional study was carried out on O-ring and slab performance vs cure cycle and showed little sensitivity of material performance to large changes in curing time. Aging and spectra of certain materials indicated that two sets of test slabs from current vendor were accidently made from EPDM rather than butyl rubber. Random testing found no O-rings made from EPDM. As a result, and additional spectroscope test will be added to the product acceptance procedures to verify the type of rubber compound used.

Domeier, L.A.; Wagter, K.R.

1996-12-01T23:59:59.000Z

5

Wafer-level packaging with compression-controlled seal ring bonding  

DOE Patents (OSTI)

A device may be provided in a sealed package by aligning a seal ring provided on a first surface of a first semiconductor wafer in opposing relationship with a seal ring that is provided on a second surface of a second semiconductor wafer and surrounds a portion of the second wafer that contains the device. Forcible movement of the first and second wafer surfaces toward one another compresses the first and second seal rings against one another. A physical barrier against the movement, other than the first and second seal rings, is provided between the first and second wafer surfaces.

Farino, Anthony J

2013-11-05T23:59:59.000Z

6

Summary of Compression Testing of U-10Mo  

SciTech Connect

The mechanical properties of depleted uranium plus 10 weight percent molybdenum alloy have been evaluated by high temperature compression testing.

Nyberg, Eric A.; Joshi, Vineet V.; Lavender, Curt A.; Burkes, Douglas

2012-10-31T23:59:59.000Z

7

Drop Tests of the Closure Ring for the 9975 Package  

SciTech Connect

The drop tests of the closure ring for 9975 packages, described here, were performed to answer questions raised by the regulatory authority as a result of deformation of the closure ring and drum rim observed during drop tests conducted in September 1998.

Smith, A.C

1999-09-29T23:59:59.000Z

8

Test Data Compression Using Dictionaries with Selective Entries  

E-Print Network (OSTI)

-based test data compression approach for reducing test data volume in SOCs. The proposed method is based and to drive a large number of internal scan chains in the circuit under test. Therefore, it is especially suitable for a reduced pin-count and low- cost DFT test environment, where a narrow interface between

Chakrabarty, Krishnendu

9

Landfill liner interface strengths from torsional-ring-shear tests  

SciTech Connect

A torsional-ring-shear apparatus and test procedure are described for measuring soil/geosynthetic and geosynthetic/geosynthetic interface strengths. Typical interface strengths are presented for a double-composite liner system and the relevancy of ring-shear strengths is illustrated using the slope failure at the Kettleman Hills Waste Repository, Kettleman City, Calif. The results of undrained ring-shear tests show that for a clay/geomembrane interface: (1) interface strength depends on plasticity and compaction water content of the clay, and the applied normal stress; (2) interface strengths measured with the torsional-ring-shear apparatus are in excellent agreement with back-calculated field strengths; and (3) peak and residual interface failure envelopes are nonlinear, and the nonlinearity should be modeled in stability analyses instead of as a combination of cohesion and friction angle. Design recommendations for interface strengths and stability analyses are also presented.

Stark, T.D. (Univ. of Illinois, Urbana, IL (United States)); Poeppel, A.R. (Langan Engineering Associates, Inc., New York, NY (United States))

1994-03-01T23:59:59.000Z

10

Compressive tensile and shear testing of melt-foamed aluminium  

SciTech Connect

For construction purposes it is utterly important to get detailed information on the possible influence of the foam thickness on the mechanical properties and on the deformation behavior of metallic foams. The effect of compressive, tensile and shear loads on aluminium foam samples has been examined with the testing methods for sandwich material as described in German and ASTM-standards. The aim is to provide more data on these mechanical properties varying the sample density and thickness. Regarding the results the most reliable material parameters as well as steps towards a relationship between the different strength parameters can be obtained.

Von Hagen, H.; Bleck, W. [Aachen Univ. of Technology (Germany). Inst. of Ferrous Metallurgy

1998-12-31T23:59:59.000Z

11

Where and when does a ring start and end? Testing the ring-species hypothesis in a species complex of Australian parrots  

Science Journals Connector (OSTI)

...s00122-006-0381-4 Higgins, P.J Handbook of Australian, New Zealand and Antarctic...dots) all as in figure 3 Where and when does a ring start and end? Testing the ring-species...to form. A ring speciation hypothesis does not explain the patterns we have observed...

2008-01-01T23:59:59.000Z

12

Proof-of-Concept Manufacturing and Testing of Composite Wind Generator Blades Made by HCBMP (High Compression Bladder Molded Prepreg)  

SciTech Connect

Proof-of-Concept Manufacturing and Testing of Composite Wind Generator Blades Made by HCBMP (High Compression Bladder Molded Prepreg)

William C. Leighty; DOE Project Officer - Keith Bennett

2005-10-04T23:59:59.000Z

13

VAPOR COMPRESSION HEAT PUMP SYSTEM FIELD TESTS AT THE TECH COMPLEX  

E-Print Network (OSTI)

323 CHAPTER 17 VAPOR COMPRESSION HEAT PUMP SYSTEM FIELD TESTS AT THE TECH COMPLEX \\B E Van D for several novel and conventional heat pump systems for space conditioning and water heating. Systems tested include the Annual Cycle Energy System (ACES), solar assisted heat pumps (SAHP) both parallel and series

Oak Ridge National Laboratory

14

PERFORMANCE TESTING OF SPRING ENERGIZED C-RINGS FOR USE IN RADIOACTIVE MATERIAL PACKAGINGS CONTAINING TRITIUM  

SciTech Connect

This paper describes the sealing performance testing and results of silver-plated inconel Spring Energized C-Rings used for tritium containment in radioactive shipping packagings. The test methodology used follows requirements of the American Society of Mechanical Engineers (ASME) summarized in ASME Pressure Vessel Code (B&PVC), Section V, Article 10, Appendix IX (Helium Mass Spectrometer Test - Hood Technique) and recommendations by the American National Standards Institute (ANSI) described in ANSI N14.5-1997. The tests parameters bound the predicted structural and thermal responses from conditions defined in the Code of Federal Regulations 10 CFR 71. The testing includes an evaluation of the effects of pressure, temperature, flange deflection, surface roughness, permeation, closure torque, torque sequencing and re-use on performance of metal C-Ring seals.

Blanton, P; Kurt Eberl, K

2007-10-23T23:59:59.000Z

15

Radioisotope Thermoelectric Generator Package O-Ring Seal Material Validation Testing  

SciTech Connect

The Radioisotope Thermoelectric Generator Package O-Ring Seal Material Validation Test was conducted to validate the use of the Butyl material as a primary seal throughout the required temperature range. Three tests were performed at (1) 233 K ({minus}40 {degrees}F), (2) a specified operating temperature, and (3) 244 K ({minus}20 {degrees}F) before returning to room temperature. Helium leak tests were performed at each test point to determine seal performance. The two major test objectives were to establish that butyl rubber material would maintain its integrity under various conditions and within specified parameters and to evaluate changes in material properties.

Adkins, H.E.; Ferrell, P.C.; Knight, R.C.

1994-09-30T23:59:59.000Z

16

A Test Facility for MEIC ERL Circulator Ring Based Electron Cooler Design  

SciTech Connect

An electron cooling facility which is capable to deliver a beam with energy up to 55 MeV and average current up to 1.5 A at a high bunch repetition rate up to 750 MHz is required for MEIC. The present cooler design concept is based on a magnetized photo-cathode SRF gun, an SRF ERL and a compact circulator ring. In this paper, we present a proposal of a test facility utilizing the JLab FEL ERL for a technology demonstration of this cooler design concept. Beam studies will be performed and supporting technologies will also be developed in this test facility.

Zhang, Yuhong [JLAB; Derbenev, Yaroslav S. [JLAB; Douglas, David R. [JLAB; Hutton, Andrew M. [JLAB; Krafft, Geoffrey A. [JLAB; Nissen, Edward W. [JLAB

2013-05-01T23:59:59.000Z

17

Radioisotope thermoelectric generator package o-ring seal material validation testing  

SciTech Connect

The Radioisotope Thermoelectric Generator Package O-Ring Seal Material Validation Test was conducted to validate the use of the Butyl material as a primary seal throughout the required temperature range. Three tests were performed at (I) 233 K ({minus}40 {degree}F), (2) a specified operating temperature, and (3) 244 K ({minus}20 {degree}F) before returning to room temperature. Helium leak tests were performed at each test point to determine seal performance. The two major test objectives were to establish that butyl rubber material would maintain its integrity under various conditions and within specified parameters and to evaluate changes in material properties. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}

Adkins, H.E.; Ferrell, P.C.; Knight, R.C. [Westinghouse Hanford Company, P. O. Box 1970, MSIN N1-25, Richland, Washington 99352 (United States)

1995-01-20T23:59:59.000Z

18

Numerical modelling of sandstone uniaxial compression test using a mix-mode cohesive fracture model  

E-Print Network (OSTI)

A mix-mode cohesive fracture model considering tension, compression and shear material behaviour is presented, which has wide applications to geotechnical problems. The model considers both elastic and inelastic displacements. Inelastic displacement comprises fracture and plastic displacements. The norm of inelastic displacement is used to control the fracture behaviour. Meantime, a failure function describing the fracture strength is proposed. Using the internal programming FISH, the cohesive fracture model is programmed into a hybrid distinct element algorithm as encoded in Universal Distinct Element Code (UDEC). The model is verified through uniaxial tension and direct shear tests. The developed model is then applied to model the behaviour of a uniaxial compression test on Gosford sandstone. The modelling results indicate that the proposed cohesive fracture model is capable of simulating combined failure behaviour applicable to rock.

Gui, Yilin; Kodikara, Jayantha

2015-01-01T23:59:59.000Z

19

Tests of a grazing-incidence ring resonator free-electron laser  

SciTech Connect

This paper reports on the Boeing free-electron laser (FEL) optical cavity that has been changed from a simple concentric cavity using two spherical mirrors to a larger grazing-incidence ring resonator. The new resonator consists of two mirror telescopes located at each end of the wiggler with a round-trip path length of approximately 133 m. Each telescope is a grazing-incidence hyperboloid followed by a normal-incidence paraboloid. Initial tests showed that poorly positioned ring focus and unreliable pointing alignment resulted in reduced and structured FEL output. (First lasing operation occurred on March 23 and 24, 1990.) Later efforts concentrated on improving the resonator alignment techniques and lowering the single-pass losses. FEL performance and reliability have significantly improved due to better ring alignment. The alignment procedure and recent lasing results are described. The effect the electron beam has on lasing is also discussed. Measurements are presented showing how FEL temporal output and wavelength are sensitive to electron beam energy variations.

Dowell, D.H.; Laucks, M.L.; Lowrey, A.R.; Adamski, J.L.; Pistoresi, D.J.; Shoffstall, D.R. (Boeing Aerospace and Electronics, Seattle, WA (US)); Bentz, M.P.; Burns, R.H.; Guha, J.; Sun, K.; Tomita, W. (Rockwell International Corp., Canoga Park, CA (United States). Rocketdyne Div.); Lumpkin, A.H.; Bender, S.; Byrd, D.; Tokar, R.L. (Los Alamos National Lab., NM (United States))

1991-12-01T23:59:59.000Z

20

Frequency-Directed Run-Length (FDR) Codes with Application to System-on-a-Chip Test Data Compression  

E-Print Network (OSTI)

Frequency-Directed Run-Length (FDR) Codes with Application to System-on-a-Chip Test Data that Golomb codes can be used for efficiently compressing system-on-a-chip test data. We now present a new, and protects intellectual property. While BIST is now extensively used for memory testing, it is not as common

Chakrabarty, Krishnendu

Note: This page contains sample records for the topic "ring compression testing" 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

Test-Architecture Optimization and Test Scheduling for SOCs with Core-Level Expansion of Compressed Test Patterns  

E-Print Network (OSTI)

is resulting in high test times and excessive tester memory requirements. To reduce both test time and test International Technology Roadmap for Semiconductors predicted that test data volume and test time will grow 30x and wrappers for core access can be combined with test scheduling at SOC level to reduce test time. The recent

Chakrabarty, Krishnendu

22

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 13, NO. 6, JUNE 2005 719 Nine-Coded Compression Technique for Testing  

E-Print Network (OSTI)

Nine-Coded Compression Technique for Testing Embedded Cores in SoCs Mohammad Tehranipoor, Member, IEEE presents a new test-data compression tech- nique that uses exactly nine codewords. Our technique aims-length blocks. In spite of its simplicity, it provides significant reduction in test- data volume and test

Tehranipoor, Mohammad

23

Material test machine for tension-compression tests at high temperature  

DOE Patents (OSTI)

Apparatus providing a device for testing the properties of material specimens at high temperatures and pressures in controlled water chemistries includes, inter alia, an autoclave housing the specimen which is being tested. The specimen is connected to a pull rod which couples out of the autoclave to an external assembly which includes one or more transducers, a force balance chamber and a piston type actuator. The pull rod feeds through the force balance chamber and is compensated thereby for the pressure conditions existing within the autoclave and tending to eject the pull rod therefrom. The upper end of the push rod is connected to the actuator through elements containing a transducer comprising a linear variable differential transformer (LVDT). The housing and coil assembly of the LVDT is coupled to a tube which runs through a central bore of the pull rod into the autoclave where it is connected to one side of the specimen. The movable core of the LVDT is coupled to a stem which runs through the tube where it is then connected to the other side of the specimen through a coupling member. A transducer in the form of a load cell including one or more strain gages is located on a necked-down portion of the upper part of the pull rod intermediate the LVDT and force balance chamber.

Cioletti, Olisse C. (Pittsburgh, PA)

1988-01-01T23:59:59.000Z

24

Creep Testing Plastic-Bonded Explosives in Uni-axial Compression  

SciTech Connect

High fidelity measurements of time-dependent strain in the plastic-bonded explosives LX-17-1 and PBX 9502 have been performed under constant, uni-axial, compressive load using a custom designed apparatus. The apparatus uses a combination of extensometers and linear variable differential transformers coupled with a data acquisition system, thermal controls, and gravitational loading. The materials being tested consist of a crystalline explosive material mixed with a polymeric binder. The behavior of each material is related to the type of explosive and to the percentage and type of binder. For any given plastic-bonded explosive, the creep behavior is also dependent on the stress level and test temperature. Experiments were conducted using a 3 x 3 stress-temperature matrix with a temperature range of 24 C to 70 C and with stresses ranging from 250-psi to 780-psi. Analysis of the data has shown that logarithmic curve fits provide an accurate means of quantification and facilitate a long-term predictive capability. This paper will discuss the design of the apparatus, experimental results, and analyses.

Gagliardi, F J; Cunningham, B J

2008-03-13T23:59:59.000Z

25

The Development of Test Procedures for controlling the Quality of the Manufacture of Engineered Compression Stockings.  

E-Print Network (OSTI)

??A new technology platform known as ‘Scan2Knit’ was invented in the William Lee innovation Centre of the University of Manchester to engineer and manufacture compression… (more)

Moghaddassian Shahidi, Arash

2010-01-01T23:59:59.000Z

26

Field Testing of Cavity Ring-Down Spectroscopy Analyzers Measuring Carbon Dioxide and Water Vapor  

Science Journals Connector (OSTI)

Prevalent methods for making high-accuracy tower-based measurements of the CO2 mixing ratio, notably nondispersive infrared spectroscopy (NDIR), require frequent system calibration and sample drying. Wavelength-scanned cavity ring-down ...

Scott J. Richardson; Natasha L. Miles; Kenneth J. Davis; Eric R. Crosson; Chris W. Rella; Arlyn E. Andrews

2012-03-01T23:59:59.000Z

27

Responses of Conventional Ring Closures of Drum Type Packages to Regulatory Drop Tests with Application to the 9974/9975 Package  

SciTech Connect

DOT, DOE and NRC Type A and Type B radioactive material (RAM) transport packages routinely use industrial or military specification drums with conventional clamp ring closures as an overpack. Considerable testing has been performed on these type packages over the past 30 years. Observations from test data have resulted in various design changes and recommendations to the standard drum specification and use, enhancing the reliability of the overpack. Recently, performance capability of the 9975 conventional clamp ring closure design was questioned by the Regulatory Authority. This paper highlights the observations of recent 9974 and 9975 package testing that led to redesign of the 9975, replacing the standard clamp ring closure with a bolted ring closure. In the course of this review and redesign effort, 18 package designs and approximately 100 Hypothetical Accident Condition (HAC) drops of various size and weight drum packages were evaluated. A trend was observed with respect to overpack lid failures for packages utilizing conventional ring closure. Based on this trend, a limit on the ratio of the content weight to total package weight was identified, beyond which clamp ring closure failure may be expected.

Blanton, P.S.

2002-05-31T23:59:59.000Z

28

High Temperature Expansion Due to Compression Test for the Determination of a Cladding Material Failure Criterion under RIA Loading Conditions  

SciTech Connect

This paper is mainly dedicated to the development of an out-of-pile test reproducing the thermo-mechanical loading conditions encountered during the first stage of a Reactivity Initiated Accidents (RIA) transient, dominated by Pellet Clad Mechanical Interaction (PCMI). In particular, the strain-controlled clad loading under high strain rate associated with temperatures up to 600 deg. C expected during the PCMI phase is simulated by an Expansion Due to Compression (EDC) test achievable at high temperature. The use of appropriate materials for the inner pellet made it possible to achieve the tests from 20 deg. C up to 900 deg. C. The interpretation of the test data is supported by Finite Element Analysis (FEA) including parameters tuned using an inverse method coupling FEA and tests results. A deformation model, identified upon the PROMETRA (Transient Mechanical Properties) experimental database and describing the anisotropic viscoplastic behavior of Cold-Worked Stress Relieved Zircaloy-4 cladding alloys under typical RIA loading conditions, is exploited. The combined analysis of experimental results and finite element simulations provides a deeper understanding of the deformation mode (near pure hoop tension) that arises during the tests. The failure mode appears to be representative of that obtained on tubes during the PCMI stage of RIA experiments. An appropriate device is currently developed in order to reach a bi-axiality of the loading path closer to that expected during the PCMI stage (between plane-strain and equal-biaxial tension). (authors)

Le Saux, M.; Poussard, C.; Averty, X.; Sainte Catherine, C.; Carassou, S. [CEA-Saclay, DEN/DMN/SEMI, 91191 Gif-Sur-Yvette (France); Besson, J. [Centre des Materiaux, Mines Paris, CNRS UMR 7633, BP 87, 91003 Evry (France)

2007-07-01T23:59:59.000Z

29

Nonlinear viscoelastic response of carbon black-filled butyl rubber and implications for o-ring aging  

SciTech Connect

Butyl rubber, unfortunately, has pronounced nonlinear viscoelastic behavior, which may be modelled by a separable KBKZ formalism. While these effects seem to have minimal impact on accelerated sealing force measurements, they do severely impact compression set tests. Therefore, a new test is suggested for evaluating field-return o-rings which is free from such confounding effects.

Adolf, D.

1997-11-01T23:59:59.000Z

30

EA-1752: Pacific Gas & Electric Company (PG&E), Compressed Air Energy Storage (CAES) Compression Testing Phase Project, San Joaquin County, California  

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

DOE is preparing this EA to evaluate the potential environmental impacts of providing a financial assistance grant under the American Recovery and Reinvestment Act of 2009 for the construction of an advanced compressed air energy storage plant in San Francisco, California.

31

FIFTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton{sup reg.} GLT O-rings used in the Model 9975 package has been ongoing for six years at the Savannah River National Laboratory. Sixty-seven mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 F. They were leak-tested initially and have been tested at nominal six month intervals to determine if they meet the criterion of leaktightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 F. High temperature aging continues for 36 GLT O-ring fixtures at 200--350 F. Room temperature leak test failures have been experienced in 5 of the GLT O-ring fixtures aging at 300 and 350 F, and in all 3 of the GLT O-ring fixtures aging at higher temperatures. No failures have yet been observed in GLT O-ring fixtures aging at 200 F for 30--48 months, which is still bounding to O-ring temperatures during storage in KAMS. High temperature aging continues for 6 GLT-S O-ring fixtures at 200--300 F. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 F. No failures have yet been observed in GLT-S O-ring fixtures aging at 200 or 300 F for 19 months. For O-ring fixtures that have failed the room temperature leak test and been disassembled, the O-rings displayed a compression set ranging from 51--95%. This is significantly greater than seen to date for packages inspected during KAMS field surveillance (23% average). For GLT O-rings, service life based on the room temperature leak rate criterion is comparable to that predicted by compression stress relaxation (CSR) data at higher temperatures (350--400 F). While there are no comparable failure data yet at aging temperatures below 300 F, extrapolations of the data for GLT O-rings suggests that CSR model predictions provide a conservative prediction of service life relative to the leak rate criterion. Failure data at lower temperatures is needed to verify this apparent trend. Insufficient failure data exist currently to perform a similar comparison for GLT-S O-rings. Aging and periodic leak testing will continue for the remaining fixtures.

Daugherty, W.; Hoffman, E.

2010-11-01T23:59:59.000Z

32

The application of triaxial compression tests to the design of sand-asphalt paving mixtures  

E-Print Network (OSTI)

' this fact, the f1ne yecxk was chosen as the aggregate to be used in all sand. -asphalt miztures tested 1n this pro/oct. It must be emphasise4. , that no sand sample, Lxas tested, mox ~ than ) " x i x . . y . * once during ths analpsis of the sands... shearing strength increases as the amount of mineral filler increases, thu ~ confirming the theory that the increase 1n surface area of the aggregate caused by the addition of dust must be taken ~ care of by an increase 1n the amount of bitumen used...

Ritter, Leo J

2012-06-07T23:59:59.000Z

33

Methods for identifying cancellous bone specimen location and size for the Reduced Platen Compression Test  

E-Print Network (OSTI)

method for defining the specimen thickness is to average the largest and smallest overall bone lengths in the test group and use a reference thickness of 2 millimeters as a percentage of this average length. This percentage of the overall average length...

Cowen, Kyle Ray

2013-02-22T23:59:59.000Z

34

Vapor compression heat pump system field tests at the tech complex  

Science Journals Connector (OSTI)

The Tennessee Energy Conservation In Housing (TECH) complex has been utilized since 1977 as a field test site for several novel and conventional heat pump systems for space conditioning and water heating. Systems tested include the Annual Cycle Energy System (ACES) solar assisted heat pumps (SAHP) both parallel and series two conventional air?to?air heat pumps an air?to?air heat pump with desuperheater water heater and horizontal coil and multiple shallow vertical coil ground?coupled heat pumps (GCHP). A direct comparison of the measured annual performance of the test systems was not possible. However a cursory examination revealed that the ACES had the best performance however its high cost makes it unlikely that it will achieve wide?spread use. Costs for the SAHP systems are similar to those of the ACES but their performance is not as good. Integration of water heating and space conditioning functions with a desuperheater yielded significant efficiency improvement at modest cost. The GCHP systems performed much better for heating than for cooling and may well be the most efficient alternative for residences in cold climates.

Van D. Baxter

1985-01-01T23:59:59.000Z

35

FIFTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton{reg_sign} GLT O-rings used in the Model 9975 package has been ongoing for six years at the Savannah River National Laboratory. Sixty-seven mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 F. They were leak-tested initially and have been tested at nominal six month intervals to determine if they meet the criterion of leaktightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 F. High temperature aging continues for 36 GLT O-ring fixtures at 200-350 F. Room temperature leak test failures have been experienced in 6 of the GLT O-ring fixtures aging at 300 and 350 F, and in all 3 of the GLT O-ring fixtures aging at higher temperatures. No failures have yet been observed in GLT O-ring fixtures aging at 200 F for 30-48 months, which is still bounding to O-ring temperatures during storage in KAMS. High temperature aging continues for 6 GLT-S O-ring fixtures at 200-300 F. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 F. No failures have yet been observed in GLT-S O-ring fixtures aging at 200 or 300 F for 19 months. For O-ring fixtures that have failed the room temperature leak test and been disassembled, the Orings displayed a compression set ranging from 51-95%. This is significantly greater than seen to date for packages inspected during KAMS field surveillance (23% average). For GLT O-rings, service life based on the room temperature leak rate criterion is comparable to that predicted by compression stress relaxation (CSR) data at higher temperatures (350-400 F). While there are no comparable failure data yet at aging temperatures below 300 F, extrapolations of the data for GLT O-rings suggests the CSR model predictions provide a conservative prediction of service life relative to the leak rate criterion. Failure data at lower temperatures are needed to verify this apparent trend. Insufficient failure data exist currently to perform a similar comparison for GLT-S O-rings. Aging and periodic leak testing will continue for the remaining fixtures.

Daugherty, W.; Hoffman, E.

2011-04-11T23:59:59.000Z

36

TESTING THE HYPOTHESIS THAT METHANOL MASER RINGS TRACE CIRCUMSTELLAR DISKS: HIGH-RESOLUTION NEAR-INFRARED AND MID-INFRARED IMAGING  

SciTech Connect

Milliarcsecond very long baseline interferometry maps of regions containing 6.7 GHz methanol maser emission have lead to the recent discovery of ring-like distributions of maser spots and the plausible hypothesis that they may be tracing circumstellar disks around forming high-mass stars. We aimed to test this hypothesis by imaging these regions in the near- and mid-infrared at high spatial resolution and compare the observed emission to the expected infrared morphologies as inferred from the geometries of the maser rings. In the near-infrared we used the Gemini North adaptive optics system of ALTAIR/NIRI, while in the mid-infrared we used the combination of the Gemini South instrument T-ReCS and super-resolution techniques. Resultant images had a resolution of {approx}150 mas in both the near-infrared and mid-infrared. We discuss the expected distribution of circumstellar material around young and massive accreting (proto)stars and what infrared emission geometries would be expected for the different maser ring orientations under the assumption that the masers are coming from within circumstellar disks. Based upon the observed infrared emission geometries for the four targets in our sample and the results of spectral energy distribution modeling of the massive young stellar objects associated with the maser rings, we do not find compelling evidence in support of the hypothesis that methanol masers rings reside in circumstellar disks.

De Buizer, James M. [Stratospheric Observatory for Infrared Astronomy-USRA, NASA Ames Research Center, MS N232-12, Moffett Field, CA 94035 (United States); Bartkiewicz, Anna; Szymczak, Marian, E-mail: jdebuizer@sofia.usra.edu [Torun Centre for Astronomy, Nicolaus Copernicus University, Gagarina 11, 87-100 Torun (Poland)

2012-08-01T23:59:59.000Z

37

Compressed Air  

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

BPA Utility Reimbursement Programs for Compressed Air Projects Customer Proposal Template Measurement & Verification Plan for Compressed Air CA 2006-15 A template for utilities to...

38

Evaluation of the robustness of the preprocessing technique improving reversible compressibility of CT images: Tested on various CT examinations  

SciTech Connect

Purpose: To modify the preprocessing technique, which was previously proposed, improving compressibility of computed tomography (CT) images to cover the diversity of three dimensional configurations of different body parts and to evaluate the robustness of the technique in terms of segmentation correctness and increase in reversible compression ratio (CR) for various CT examinations.Methods: This study had institutional review board approval with waiver of informed patient consent. A preprocessing technique was previously proposed to improve the compressibility of CT images by replacing pixel values outside the body region with a constant value resulting in maximizing data redundancy. Since the technique was developed aiming at only chest CT images, the authors modified the segmentation method to cover the diversity of three dimensional configurations of different body parts. The modified version was evaluated as follows. In randomly selected 368 CT examinations (352 787 images), each image was preprocessed by using the modified preprocessing technique. Radiologists visually confirmed whether the segmented region covers the body region or not. The images with and without the preprocessing were reversibly compressed using Joint Photographic Experts Group (JPEG), JPEG2000 two-dimensional (2D), and JPEG2000 three-dimensional (3D) compressions. The percentage increase in CR per examination (CR{sub I}) was measured.Results: The rate of correct segmentation was 100.0% (95% CI: 99.9%, 100.0%) for all the examinations. The median of CR{sub I} were 26.1% (95% CI: 24.9%, 27.1%), 40.2% (38.5%, 41.1%), and 34.5% (32.7%, 36.2%) in JPEG, JPEG2000 2D, and JPEG2000 3D, respectively.Conclusions: In various CT examinations, the modified preprocessing technique can increase in the CR by 25% or more without concerning about degradation of diagnostic information.

Jeon, Chang Ho; Kim, Bohyoung; Gu, Bon Seung; Lee, Jong Min [Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 (Korea, Republic of)] [Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 (Korea, Republic of); Kim, Kil Joong [Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707, South Korea and Department of Radiation Applied Life Science, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799 (Korea, Republic of)] [Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707, South Korea and Department of Radiation Applied Life Science, Seoul National University College of Medicine, 103 Daehak-ro, Jongno-gu, Seoul 110-799 (Korea, Republic of); Lee, Kyoung Ho [Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707, South Korea and Institute of Radiation Medicine, Seoul National University Medical Research Center, and Clinical Research Institute, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-744 (Korea, Republic of)] [Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707, South Korea and Institute of Radiation Medicine, Seoul National University Medical Research Center, and Clinical Research Institute, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul 110-744 (Korea, Republic of); Kim, Tae Ki [Medical Information Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 (Korea, Republic of)] [Medical Information Center, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707 (Korea, Republic of)

2013-10-15T23:59:59.000Z

39

Compression embedding  

DOE Patents (OSTI)

A method and apparatus for embedding auxiliary information into the digital representation of host data created by a lossy compression technique and a method and apparatus for constructing auxiliary data from the correspondence between values in a digital key-pair table with integer index values existing in a representation of host data created by a lossy compression technique. The methods apply to data compressed with algorithms based on series expansion, quantization to a finite number of symbols, and entropy coding. Lossy compression methods represent the original data as ordered sequences of blocks containing integer indices having redundancy and uncertainty of value by one unit, allowing indices which are adjacent in value to be manipulated to encode auxiliary data. Also included is a method to improve the efficiency of lossy compression algorithms by embedding white noise into the integer indices. Lossy compression methods use loss-less compression to reduce to the final size the intermediate representation as indices. The efficiency of the loss-less compression, known also as entropy coding compression, is increased by manipulating the indices at the intermediate stage. Manipulation of the intermediate representation improves lossy compression performance by 1 to 10%.

Sandford, II, Maxwell T. (Los Alamos, NM); Handel, Theodore G. (Los Alamos, NM); Bradley, Jonathan N. (Los Alamos, NM)

1998-01-01T23:59:59.000Z

40

Compressed Sensing accelerated radial acquisitions for dynamic Magnetic Resonance Imaging.  

E-Print Network (OSTI)

??We present a flexible method dubbed Accelerated Radial Compressed Sensing (ARCS) which uses Compressed Sensing to reconstruct 2D and 3D radial data. Our tests on… (more)

Zwaan, I.N.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Morphological characterization of O-rings from the GCEP long-term test program. [Dupont 1141, 3M 4762 and 4768, and Parker V884-75 O-rings  

SciTech Connect

Based on the results of the morphological and structural characterizations reported herein the following conclusions have been reached. (1) O-rings of any of the four materials studied should last at least 10 years when employed in a standard static seal configuration utilizing a groove that holds the O-ring. (2) Such a static seal provides considerable protection from reaction. (3) The reaction of UF/sub 6/ with the O-ring material is the dominant degradation reaction; however there are effects on a least one compound that appear to be related to HF penetration into the O-ring matrix. The slow nature of the reaction of UF/sub 6/ with the flanged O-rings makes life projections quite difficult using any means. It would appear that one of the best methods for determining the life of these materials would be actual use combined with routine long-term inspection/sampling of a selected typical subset of O-rings. At GCEP conditions it would not be surprising to find the actual life of the O-rings is longer than any anticipated operation time of the plant facility. 16 figures, 1 table.

Hughes, M.R.; Nolan, T.A.

1984-07-30T23:59:59.000Z

42

Reply to Baker and Genty's comments on "A test of annual resolution in stalagmite using tree rings"  

E-Print Network (OSTI)

of a single, banded stalagmite from Carslbad Cavern, New Mex- ico, USA, reported by Polyak and Asmerom (2001 Carlsbad Cavern, where there was no overlap with the instrumental record. These potential tests

43

Methodology for Mechanical Property Testing of Fuel Cladding Using a Expanded Plug Wedge Test  

SciTech Connect

An expanded plug method was developed earlier for determining the tensile properties of irradiated fuel cladding. This method tests fuel rod cladding ductility by utilizing an expandable plug to radially stretch a small ring of irradiated cladding material. The circumferential or hoop strain is determined from the measured diametrical expansion of the ring. A developed procedure is used to convert the load circumferential strain data from the ring tests into material pseudo-stress-strain curves, from which material properties of the cladding can be extracted. However, several deficiencies existed in this expanded-plug test that can impact the accuracy of test results, such as that the large axial compressive stress resulted from the expansion plug test can potentially induce the shear failure mode of the tested specimen. Moreover, highly nonuniform stress and strain distribution in the deformed clad gage section and significant compressive stresses, induced by bending deformation due to clad bulging effect, will further result in highly nonconservative estimates of the mechanical properties for both strength and ductility of the tested clad. To overcome the aforementioned deficiencies associated with the current expansion plug test, systematic studies have been conducted. By optimizing the specific geometry designs, selecting the appropriate material for the expansion plug, and adding new components into the testing system, a modified expansion plug testing protocol has been developed. A general procedure was also developed to determine the hoop stress in the tested ring specimen. A scaling factor, -factor, was used to convert the ring load Fring into hoop stress , and is written as _ = F_ring/tl , where t is the clad thickness and l is the clad length. The generated stress-strain curve agrees well with the associated tensile test data in both elastic and plastic deformation regions.

Jiang, Hao [ORNL; Wang, Jy-An John [ORNL

2014-01-01T23:59:59.000Z

44

SIXTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton{reg_sign} GLT O-rings used in the Model 9975 package has been ongoing for seven years at the Savannah River National Laboratory. Seventy tests using mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 F. They were leak-tested initially and have been tested periodically to determine if they meet the criterion of leak-tightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 F. High temperature aging continues for 33 GLT O-ring fixtures at 200-300 F. Room temperature leak test failures have been experienced in all of the GLT O-ring fixtures aging at 350 F and higher temperatures, and in 7 fixtures aging at 300 F. No failures have yet been observed in GLT O-ring fixtures aging at 200 F for 41-60 months, which is still bounding to O-ring temperatures during storage in K-Area Complex (KAC). Based on expectations that the fixtures aging at 200 F will remain leak-tight for a significant period yet to come, 2 additional fixtures began aging within the past year at an intermediate temperature of 270 F, with hopes that they may leak before the 200 F fixtures. High temperature aging continues for 6 GLT-S O-ring fixtures at 200-300 F. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 F. No failures have yet been observed in GLT-S O-ring fixtures aging at 200-300 F for up to 26 months. For O-ring fixtures that have failed the room temperature leak test and been disassembled, the Orings displayed a compression set ranging from 51-96%. This is greater than seen to date for packages inspected during KAC field surveillance (24% average). For GLT O-rings, separate service life estimates have been made based on the O-ring fixture leak test data and based on compression stress relaxation (CSR) data. These two predictive models show reasonable agreement at higher temperatures (350-400 F). However, at 300 F, the room temperature leak test failures to date experienced longer aging times than predicted by the CSR-based model. This suggests that extrapolations of the CSR model predictions to temperatures below 300 F will provide a conservative prediction of service life relative to the leak rate criterion. Leak test failure data at lower temperatures are needed to verify this apparent trend. Insufficient failure data exist currently to perform a similar comparison for GLT-S O-rings. Aging and periodic leak testing will continue for the remaining fixtures.

Daugherty, W.

2011-08-31T23:59:59.000Z

45

DEVELOPMENT AND CONSTRUCTION OF LOW-CRACKING HIGH-PERFORMANCE CONCRETE (LC-HPC) BRIDGE DECKS: FREE SHRINKAGE TESTS, RESTRAINED RING TESTS, CONSTRUCTION EXPERIENCE, AND CRACK SURVEY RESULTS  

E-Print Network (OSTI)

The development, construction, and evaluation of low-cracking high-performance concrete (LC-HPC) bridge decks are described based on laboratory test results and experiences gained during the construction of 13 LC-HPC bridge ...

Yuan, Jiqiu

2011-12-31T23:59:59.000Z

46

NINTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton® GLT O-rings used in the Model 9975 package has been ongoing since 2004 at the Savannah River National Laboratory. One approach has been to periodically evaluate the leak performance of O-rings being aged in mock-up 9975 Primary Containment Vessels (PCVs) at elevated temperatures. Other methods such as compression-stress relaxation (CSR) tests and field surveillance are also on-going to evaluate O-ring behavior. Seventy tests using PCV mock-ups were assembled and heated to temperatures ranging from 200 to 450 ºF. They were leak-tested initially and have been tested periodically to determine if they continue to meet the leak-tightness criterion defined in ANSI standard N14.5-97. Due to material substitution, fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 ºF. High temperature aging continues for 23 GLT O-ring fixtures at 200 – 270 ºF. Room temperature leak test failures have been experienced in all of the GLT O-ring fixtures aging at 350 ºF and higher temperatures, and in 8 fixtures aging at 300 ºF. The earliest 300 °F GLT O-ring fixture failure was observed at 34 months. The remaining GLT O-ring fixtures aging at 300 ºF have been retired from testing following more than 5 years at temperature without failure. No failures have yet been observed in GLT O-ring fixtures aging at 200 ºF for 72 - 96 months, which bounds O-ring temperatures anticipated during storage in K-Area Complex (KAC). Based on expectations that the 200 ºF fixtures will remain leak-tight for a significant period yet to come, 2 additional fixtures began aging in 2011 at 270 ºF, with hopes that they may reach a failure condition before the 200 ºF fixtures, thus providing additional time to failure data. High temperature aging continues for 6 GLT-S O-ring fixtures at 200 – 300 ºF. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 ºF. No failures have yet been observed in GLT-S O-ring fixtures aging at 200 - 300 ºF for 54 - 57 months. No additional O-ring failures have been observed since the last interim report was issued. Aging and periodic leak testing will continue for the remaining PCV fixtures. Additional irradiation of several fixtures is recommended to maintain a balance between thermal and radiation exposures similar to that experienced in storage, and to show the degree of consistency of radiation response between GLT and GLT-S O-rings.

Daugherty, W.

2014-08-06T23:59:59.000Z

47

Pore-water extraction from unsaturated tuff by triaxial and one-dimensional compression methods, Nevada Test Site, Nevada  

SciTech Connect

The hydrologic system in the unsaturated tuff at Yucca Mountain, Nevada, is being evaluated for the US Department of Energy by the Yucca Mountain Project Branch of the US Geological Survey as a potential site for a high-level radioactive-waste repository. Part of this investigation includes a hydrochemical study that is being made to assess characteristics of the hydrologic system such as: traveltime, direction of flow, recharge and source relations, and types and magnitudes of chemical reactions in the unsaturated tuff. In addition, this hydrochemical information will be used in the study of the dispersive and corrosive effects of unsaturated-zone water on the radioactive-waste storage canisters. This report describes the design and validation of laboratory experimental procedures for extracting representative samples of uncontaminated pore water from welded and nonwelded, unsaturated tuffs from the Nevada Test Site.

Mower, T.E. [PRC Environmental Management, Inc., Denver, CO (United States); Higgins, J.D. [Colorado School of Mines, Golden, CO (United States); Yang, In C.; Peters, C.A. [Geological Survey, Denver, CO (United States)

1994-07-01T23:59:59.000Z

48

Raw Data Compression in Computed Tomography: Noise Shaping  

E-Print Network (OSTI)

Raw Data Compression in Computed Tomography: Noise Shaping Yao Xie (team member: Adam Wang) Project.1 Background X-ray computed tomography (CT) builds on the physical principles of radiography. It uses multiple ring that has a limited data transfer rate. Compression can be used to reduce the data rate through

Xie, Yao

49

Formation of compressed flat electron beams with high transverse-emittance ratios  

SciTech Connect

Flat beams—beams with asymmetric transverse emittances—have important applications in novel light-source concepts and advanced-acceleration schemes and could possibly alleviate the need for damping rings in lepton colliders. Over the last decade, a flat beam generation technique based on the conversion of an angular-momentum-dominated beam was proposed and experimentally tested. In this paper we explore the production of compressed flat beams. We especially investigate and optimize the flat beam transformation for beams with substantial fractional energy spread. We use as a simulation example the photoinjector of Fermilab’s Advanced Superconducting Test Accelerator. The optimizations of the flat beam generation and compression at Advanced Superconducting Test Accelerator were done via start-to-end numerical simulations for bunch charges of 3.2 nC, 1.0 nC, and 20 pC at ?37??MeV. The optimized emittances of flat beams with different bunch charges were found to be 0.25???m (emittance ratio is ?400), 0.13????m, 15 nm before compression, and 0.41???m, 0.20???m, 16 nm after full compression, respectively, with peak currents as high as 5.5 kA for a 3.2?nC flat beam. These parameters are consistent with requirements needed to excite wakefields in asymmetric dielectric-lined waveguides or produce significant photon flux using small-gap micro-undulators.

Zhu, J. [Fermilab; Institute of Fluid Physics, CAEP, China; Piot, P. [Northern Illinois University; Fermilab; Mihalcea, D. [Northern Illinois University; Prokop, C. R. [Northern Illinois University

2014-08-01T23:59:59.000Z

50

Ion Rings for Magnetic Fusion  

SciTech Connect

This Final Technical Report presents the results of the program, Ion Rings for Magnetic Fusion, which was carried out under Department of Energy funding during the period August, 1993 to January, 2005. The central objective of the program was to study the properties of field-reversed configurations formed by ion rings. In order to reach this objective, our experimental program, called the Field-reversed Ion Ring Experiment, FIREX, undertook to develop an efficient, economical technology for the production of field-reversed ion rings. A field-reversed configuration (FRC) in which the azimuthal (field-reversing) current is carried by ions with gyro-radius comparable to the magnetic separatrix radius is called a field-reversed ion ring. A background plasma is required for charge neutralization of the ring, and this plasma will be confined within the ring's closed magnetic flux. Ion rings have long been of interest as the basis of compact magnetic fusion reactors, as the basis for a high-power accelerator for an inertial fusion driver, and for other applications of high power ion beams or plasmas of high energy density. Specifically, the FIREX program was intended to address the longstanding question of the contribution of large-orbit ions to the observed stability of experimental FRCs to the MHD tilt mode. Typical experimental FRCs with s {approx} 2-4, where s is the ratio of separatrix radius to ion gyro-radius, have been stable to tilting, but desired values for a fusion reactor, s > 20, should be unstable. The FIREX ring would consist of a plasma with large s for the background ions, but with s {approx} 1 for the ring ions. By varying the proportions of these two populations, the minimum proportion of large-orbit ions necessary for stability could be determined. The incorporation of large-orbit ions, perhaps by neutral-beam injection, into an FRC has been advanced for the purpose of stabilizing, heating, controlling angular momentum, and aiding the formation of a reactor-scale FRC, and the FIREX program was intended to test the ideas behind this approach. We will describe in this report the technological development path and advances in physics understanding that allowed FIREX to reach a regime in which ion rings were reproducibly created with up to about half the current necessary to produce field reversal. Unfortunately, the experiments were limited to this level by a fundamental, unanticipated aspect of the physics of strong ion rings in plasma. The FIREX ring is a strongly anisotropic, current-carrying population of ions moving faster than the Alfven speed in the background plasma. The rapidly changing ring current excites very large-amplitude Alfven waves in the plasma, and these waves strongly affect the ring, causing rapid energy loss in a way that is not compatible with the success of the ring trapping scenario around which FIREX was designed. The result was that FIREX rings were always very short-lived. We will discuss the implication of these results for possible future use of large-orbit ions in FRCs. In short, it appears that a certain range of the parameters characterizing the ring Alfven mach number and distribution function must be avoided to allow the existence of a long-lived energetic ion component in an FRC. This report will explain why FIREX experimental results cannot be directly scaled to quantitatively predict this range for a particular FRC configuration. This will require accurate, three-dimensional simulations. FIREX results do constitute a very good dataset for validating such a code, and simulations already carried out during this program provide a guide to the important physics involved.

Greenly, John, B.

2005-07-31T23:59:59.000Z

51

Stirling engine piston ring  

DOE Patents (OSTI)

A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby allowing the contact pressure on the ring to be predetermined through the use of a preloaded expander ring.

Howarth, Roy B. (Clifton Park, NY)

1983-01-01T23:59:59.000Z

52

Pre-stressed/pre-compressed gas turbine nozzle  

DOE Patents (OSTI)

A method of increasing low cycle fatigue life of a turbine nozzle comprising a plurality of stationary airfoils extending between radially inner and outer ring segments comprising a) providing at least one radial passage in each of the plurality of airfoils; b) installing a rod in the radial passage extending between the radially inner and outer ring segments and fixing one end of the rod to one of the inner and outer rings; and c) pre-loading the rod to compress the airfoil between the inner and outer ring segments.

Jang, Hoyle (Schenectady, NY); Itzel, Gary Michael (Clifton Park, NY); Yu, Yufeng Phillip (Guilderland, NY)

2002-01-01T23:59:59.000Z

53

EA-1752: Pacific Gas & Electric, Compressed Air Energy Storage Compression  

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

52: Pacific Gas & Electric, Compressed Air Energy Storage 52: Pacific Gas & Electric, Compressed Air Energy Storage Compression Testing Phase and Temporary Site Facilities, Kings Island, San Joaquin County, California EA-1752: Pacific Gas & Electric, Compressed Air Energy Storage Compression Testing Phase and Temporary Site Facilities, Kings Island, San Joaquin County, California Summary DOE prepared an EA to evaluate the potential environmental impacts of providing a financial assistance grant under the American Recovery and Reinvestment Act of 2009 for the construction of an advanced compressed air energy storage plant in San Francisco, California. Public Comment Opportunities Draft EA: Comment Period Ended 12/31/13. DOE will consider late submissions to the extent practicable. Comments should be marked "PG&E Compressed Air Energy Storage Draft EA

54

Using Statistical Transformations to Improve Compression for Linear Decompressors  

E-Print Network (OSTI)

in the test data to reduce the number of specified bits that need to be produced by the linear decompressor described in this paper. 1. Introduction Test data compression provides a means to reduce test costs by reducing tester storage, test time, and test data bandwidth requirements. Compressing the output response

Touba, Nur A.

55

Bicycling Black Rings  

E-Print Network (OSTI)

We present detailed physics analyses of two different 4+1-dimensional asymptotically flat vacuum black hole solutions with spin in two independent planes: the doubly spinning black ring and the bicycling black ring system ("bi-rings"). The latter is a new solution describing two concentric orthogonal rotating black rings which we construct using the inverse scattering technique. We focus particularly on extremal zero-temperature limits of the solutions. Such limits exist for both types of solutions; for the bi-rings it is obtained when the two rings drag each other to extremality through the effect of gravitational frame-dragging. We construct the phase diagram of currently known zero-temperature vacuum black hole solutions with a single event horizon, and discuss the non-uniqueness introduced by more exotic black hole configurations such as bi-rings and multi-ring saturns.

Elvang, Henriette

2008-01-01T23:59:59.000Z

56

EA-1752: Pacific Gas & Electric, Compressed Air Energy Storage Compression  

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

752: Pacific Gas & Electric, Compressed Air Energy Storage 752: Pacific Gas & Electric, Compressed Air Energy Storage Compression Testing Phase and Temporary Site Facilities, Kings Island, San Joaquin County, California EA-1752: Pacific Gas & Electric, Compressed Air Energy Storage Compression Testing Phase and Temporary Site Facilities, Kings Island, San Joaquin County, California Summary DOE prepared an EA to evaluate the potential environmental impacts of providing a financial assistance grant under the American Recovery and Reinvestment Act of 2009 for the construction of an advanced compressed air energy storage plant in San Francisco, California. Public Comment Opportunities Draft EA: Comment Period Ends 12/31/13. DOE will consider late submissions to the extent practicable. A notice of availability will be published in The Record (Stockton) and the

57

Storage rings for investigation of ion-atom collisions  

SciTech Connect

In this survey, we give a brief description of synchrotron storage rings for heavy ions, and examples for their use in ion-atom collision physics. The compression of the phase space distribution of the ions by electron cooling, and the gain factors of in-ring experiments compared to single-pass experiments are explained. Some examples of a new generation of ion-atom collision experiments which may become feasible with storage rings are given. These include the studies of angular differential single- and double-electron capture cross sections, the production of slow highly charged recoil ions, and atomic collision processes using decelerated and crossed beam. 30 refs.

Schuch, R.

1987-08-01T23:59:59.000Z

58

Gasket and snap ring installation tool  

DOE Patents (OSTI)

A tool for installing a gasket and a snap ring including a shaft, a first plate attached to the forward end of the shaft, a second plate slidably carried by the shaft, a spring disposed about the shaft between the first and second plates, and a sleeve that is free to slide over the shaft and engage the second plate. The first plate has a loading surface with a loading groove for receiving a snap ring and a shoulder for holding a gasket. A plurality of openings are formed through the first plate, communicating with the loading groove and approximately equally spaced about the groove. A plurality of rods are attached to the second plate, each rod slidable in one of the openings. In use, the loaded tool is inserted into a hollow pipe or pipe fitting having an internal flange and an internal seating groove, such that the gasket is positioned against the flange and the ring is in the approximate plane of the seating groove. The sleeve is pushed against the second plate, sliding the second plate towards the first plate, compressing the spring and sliding the rods forwards in the openings. The rods engage the snap ring and urge the ring from the loading groove into the seating groove.

Southerland, Jr., James M. (Aiken, SC); Barringer, Jr., Curtis N. (Orangeburg, SC)

1994-01-01T23:59:59.000Z

59

Department of Mechanical Engineering Fall 2010 Lycoming Engines Design of Novel Piston Rings  

E-Print Network (OSTI)

assembly for use in air-cooled aircraft internal combustion engines. Lycoming currently uses two cast iron keystone shaped compression rings and an oil control ring. Objectives The main objective is to deliver. The main design aspects the team focused on were: Improving combustion gas sealing Reducing oil

Demirel, Melik C.

60

Minimize Compressed Air Leaks  

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

This tip sheet outlines a strategy for compressed air leak detection and provides a formula for cost savings calculations.

Note: This page contains sample records for the topic "ring compression testing" 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

Chapter 6 - Compression  

Science Journals Connector (OSTI)

Publisher Summary Compression is crucial to all gas well production as it is the primary means to transport gas to market. Compression is also vital to deliquification, lowering wellhead pressure, and increasing gas velocity. The lower bottom hole producing pressure from deliquifying wells and lowering surface pressures with compression can result in substantial production and reserves increases. Compressing associated gas in oil wells is often seen as a simple “rate acceleration” project that seldom has good economics. Compression and reduced surface pressure is usually the first tool used in the life of a gas well to keep it deliquified and sometimes the only artificial lift method used, but compression can also be used to increase the effectiveness of other artificial lift deliquification methods including foamers, gas lift, beam pumping, ESPs, and velocity strings. There are many different types of compressors, each of which has its own operating ranges, efficiencies, strengths, and weaknesses. A majority of the applications for gas well deliquification involve the use of reciprocating or screw compressors. In addition, the study discusses compression horsepower and critical velocity; compression horsepower is related to the ratio of the discharge and suction pressures in psia commonly known as the compression ratio. Along with this, the effect of permeability on compression, pressure drop in compression suction, downstream gathering, and compression's effect on uplift from deliquifying individual gas wells are briefly discussed in this chapter.

James F. Lea; Henry V. Nickens; Mike R. Wells

2008-01-01T23:59:59.000Z

62

Bicycling Black Rings  

E-Print Network (OSTI)

We present detailed physics analyses of two different 4+1-dimensional asymptotically flat vacuum black hole solutions with spin in two independent planes: the doubly spinning black ring and the bicycling black ring system ("bi-rings"). The latter is a new solution describing two concentric orthogonal rotating black rings which we construct using the inverse scattering technique. We focus particularly on extremal zero-temperature limits of the solutions. We construct the phase diagram of currently known zero-temperature vacuum black hole solutions with a single event horizon, and discuss the non-uniqueness introduced by more exotic black hole configurations such as bi-rings and multi-ring saturns.

Henriette Elvang; Maria J. Rodriguez

2008-01-25T23:59:59.000Z

63

Electrorheological fluid under elongation, compression, and shearing  

Science Journals Connector (OSTI)

Electrorheological (ER) fluid based on zeolite and silicone oil under elongation, compression, and shearing was investigated at room temperature. Dc electric fields were applied on the ER fluid when elongation and compression were carried out on a self-constructed test system. The shear yield stress, presenting the macroscopic interactions of particles in the ER fluid along the direction of shearing and perpendicular to the direction of the electric field, was also obtained by a HAAKE RV20 rheometer. The tensile yield stress, presenting the macroscopic interactions of particles in the ER fluid along the direction of the electric field, was achieved as the peak value in the elongating curve with an elongating yield strain of 0.15–0.20. A shear yield angle of about 15°–18.5° reasonably connected tensile yield stress with shear yield stress, agreeing with the shear yield angle tested well by other researchers. The compressing tests showed that the ER fluid has a high compressive modulus under a small compressive strain lower than 0.1. The compressive stress has an exponential relationship with the compressive strain when it is higher than 0.1, and it is much higher than shear yield stress.

Y. Tian; Y. Meng; H. Mao; S. Wen

2002-03-06T23:59:59.000Z

64

Hydrogen Delivery Liquefaction and Compression  

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

Hydrogen Delivery Liquefaction and Compression - Overview of commercial hydrogen liquefaction and compression and opportunities to improve efficiencies and reduce cost.

65

STATUS REPORT FOR AGING STUDIES OF EPDM O-RING MATERIAL FOR THE H1616 SHIPPING PACKAGE  

SciTech Connect

This is an interim status report for tasks carried out per Task Technical Plan SRNL-STI-2011-00506. A series of tasks/experiments are being performed at the Savannah River National Laboratory to monitor the aging performance of ethylene propylene diene monomer (EPDM) Orings used in the H1616 shipping package. The data will support the technical basis to extend the annual maintenance of the EPDM O-rings in the H1616 shipping package and to predict the life of the seals at bounding service conditions. Current expectations are that the O-rings will maintain a seal at bounding normal temperatures in service (152 F) for at least 12 months. The baseline aging data review suggests that the EPDM O-rings are likely to retain significant mechanical properties and sealing force at bounding service temperatures to provide a service life of at least 2 years. At lower, more realistic temperatures, longer service life is likely. Parallel compression stress relaxation and vessel leak test efforts are in progress to further validate this assessment and quantify a more realistic service life prediction. The H1616 shipping package O-rings were evaluated for baseline property data as part of this test program. This was done to provide a basis for comparison of changes in material properties and performance parameters as a function of aging. This initial characterization was limited to physical and mechanical properties, namely hardness, thickness and tensile strength. These properties appear to be consistent with O-ring specifications. Three H1616-1 Containment Vessels were placed in test conditions and are aging at temperatures ranging from 160 to 300 F. The vessels were Helium leak-tested initially and have been tested at periodic intervals after cooling to room temperature to determine if they meet the criterion of leaktightness defined in ANSI standard N14.5-97 (< 1E-07 std cc air/sec at room temperature). To date, no leak test failures have occurred. The cumulative time at temperature ranges from 174 days for the 300 F vessel to 189 days for the 160 F vessel as of 8/1/2012. The compression stress-relaxation (CSR) behavior of H1616 shipping package O-rings is being evaluated to develop an aging model based on material properties. O-ring segments were initially aged at four temperatures (175 F, 235 F, 300 F and 350 F). These temperatures were selected to bound normal service temperatures and to challenge the seals within a reasonable aging period. Currently, samples aging at 300 F and 350 F have reached the mechanical failure point (end of life) which is defined in this study as 90% loss of initial sealing force. As a result, additional samples more recently began aging at {approx}270 F to provide additional data for the aging model. Aging and periodic leak testing of the full containment vessels, as well as CSR testing of O-ring segments is ongoing. Continued testing per the Task Technical Plan is recommended in order to validate the assumptions outlined in this status report and to quantify and validate the long-term performance of O-ring seals under actual service conditions.

Stefek, T.; Daugherty, W.; Skidmore, E.

2012-08-31T23:59:59.000Z

66

The Fermilab recycler ring  

SciTech Connect

The Fermilab Recycler is a permanent magnet storage ring for the accumulation of antiprotons from the Antiproton Source, and the recovery and cooling of the antiprotons remaining at the end of a Tevatron store. It is an integral part of the Fermilab III luminosity upgrade. The following paper describes the design features, operational and commissioning status of the Recycler Ring.

Martin Hu

2001-07-24T23:59:59.000Z

67

IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 16, NO. 11, NOVEMBER 2008 1429 Test Data Compression Using Selective  

E-Print Network (OSTI)

.2000674 testing can be reduced by using a large number of internal scan chains. However, the number of ATE, and Krishnendu Chakrabarty, Fellow, IEEE Abstract--We present a selective encoding method that reduces test data- 0204077. A preliminary version of this paper was published in the Proceeding of the IEEE International

Chakrabarty, Krishnendu

68

Factors affecting piston ring friction  

E-Print Network (OSTI)

The piston ring pack friction is a major contributor to the internal combustion engine mechanical friction loss. The oil control ring decides the oil supply to the top two rings in addition to being the major friction ...

Liao, Kai, Ph. D. Massachusetts Institute of Technology

2013-01-01T23:59:59.000Z

69

NETL: CO2 Compression  

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

CO2 Compression CO2 Compression The CO2 captured from a power plant will need to be compressed from near atmospheric pressure to a pressure between 1,500 and 2,200 psi in order to be transported via pipeline and then injected into an underground sequestration site. Read More! CO2 Compression The compression of CO2 represents a potentially large auxiliary power load on the overall power plant system. For example, in an August 2007 study conducted for DOE/NETL, CO2 compression was accomplished using a six-stage centrifugal compressor with interstage cooling that required an auxiliary load of approximately 7.5 percent of the gross power output of a subcritical pressure, coal-fired power plant. As a result, DOE/NETL is sponsoring R&D to develop novel methods that can significantly decrease the

70

Compressed Air Storage Strategies | Department of Energy  

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

Storage Strategies Compressed Air Storage Strategies This tip sheet briefly discusses compressed air storage strategies. COMPRESSED AIR TIP SHEET 9 Compressed Air Storage...

71

Hydrogen Delivery Liquefaction & Compression  

E-Print Network (OSTI)

Hydrogen Delivery Liquefaction & Compression Raymond Drnevich Praxair - Tonawanda, NY Strategic Initiatives for Hydrogen Delivery Workshop - May 7, 2003 #12;2 Agenda Introduction to Praxair Hydrogen Liquefaction Hydrogen Compression #12;3 Praxair at a Glance The largest industrial gas company in North

72

LAPPED TRANSFORMS COMPRESSION  

E-Print Network (OSTI)

Chapter 6 LAPPED TRANSFORMS FOR IMAGE COMPRESSION Ricardo L. de Queiroz Digital Imaging Technology aspects of lapped transforms and their applications to image compression. It is a subject that has been extensively studied mainly because lapped transforms are closely related to filter banks, wavelets, and time

de Queiroz, Ricardo L.

73

The performance of the Los Alamos Proton Storage Ring  

SciTech Connect

The Proton Storage Ring (PSR) now in operation at Los Alamos is a high-current accumulator that generates intense 800-MeV proton pulses for driving the Los Alamos Neutron Scattering Center (LANSCE) spallation source. The ring compresses up to 1000-..mu..s-long macropulses from the LAMPF linac into 250-ns bunches and ejects them to a neutron-production target, providing an output optimized for thermal-neutron-scattering research. The design pulse rate and peak pulse intensity of PSR are 12 Hz and 5.2 . 10/sup 13/ protons per pulse (ppp), yielding 100 ..mu..A average current when full performance is reached. This paper summarizes commissioning results and operational experience in the two years since first beam. The PSR has operated in production at average currents up to 30 ..mu..A and has reached a peak intensity of 3.4 . 10/sup 13/ ppp. These achievements represents 30% and 65% of the design objectives. Higher current production has been inhibited by beam losses during accumulation and extraction. Therefore, experiments to understand loss mechanisms have occupied a large fraction of the commissioning effort. Correction of an extraction-channel aperture restriction identified late in 1986 should dramatically reduce extraction losses, which will permit higher current production in 1987. Beam tests in the 10/sup 13/-ppp range have indicated the presence of a collective instability tentatively identified as transverse. However, by suitable parameter adjustments, the instability threshold can be pushed above the top charge-level attainable with the existing H /sup -/ source.

Lawrence, G.P.

1987-03-01T23:59:59.000Z

74

Study of ring and ring-disk electrodes  

SciTech Connect

Rotating ring and ring-disk electrodes were modeled. The primary, secondary, and below-the-limiting current distributions for ring electrodes were computed. The ring-disk system was modeled for secondary and below-the-limiting current distributions. Mass transfer measurements in laminar, transition, and turbulent flows were made for thin rotating rings. The effect of cell walls on the potential distribution of disk electrodes was computed.

Pierini, P.E.

1981-05-01T23:59:59.000Z

75

Fundamentals of Compressed Air Systems  

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

Find out how a compressed air system works and the benefits of optimal compressed air system performance. This initial class demonstrates how to compute the current cost of your plant's compressed...

76

Extracting Constitutive Stress-Strain Behavior of Microscopic Phases by Micropillar Compression  

SciTech Connect

The manuscript describes how micropillar compression technique can be used to perform uniaxial compression tests within individual grains so as to generate local-scale constitutive behavior which, otherwise cannot be ascertained from the conventional macroscale compression test techniques. The manuscript uses steel and magnesium alloys as an example. A portion of the magnesium work was performed at PNNL.

Williams, J. J.; Walters, Jennifer; Wang, Mingyue; Chawla, N.; Rohatgi, Aashish

2013-02-01T23:59:59.000Z

77

Argonne TTRDC - Engines - Home - combustion, compression ignition,  

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

* Combustion Visualization * Combustion Visualization * Compression-Ignition * Emissions Control * Fuel Injection and Sprays * Idling * Multi-Dimensional Modeling * Particulate Matter * Spark Ignition Green Racing GREET Hybrid Electric Vehicles Hydrogen & Fuel Cells Materials Modeling, Simulation & Software Plug-In Hybrid Electric Vehicles PSAT Smart Grid Student Competitions Technology Analysis Transportation Research and Analysis Computing Center Working With Argonne Contact TTRDC Engines Omnivorous engine tested by Thomas Wallner Thomas Wallner tests the omnivorous engine, a type of spark-ignition engine. Argonne's engine research is contributing to advances in technology that will impact the use of conventional and alternative fuels and the design of advanced technology vehicles. Compression Ignition

78

Effects of electrode compression on the performance of a solid polymer electrolyte fuel cell  

E-Print Network (OSTI)

The effects of electrode compression on the performance of a polymer electrolyte fuel cell (PEFC) were investigated. Preliminary testing showed that considerable compression of the carbon cloth electrodes was provided by the PEFC structure. Further...

Del Campo, Christopher Scott

2012-06-07T23:59:59.000Z

79

NSLS VUV Storage Ring  

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

VUV Storage Ring VUV Storage Ring VUV Normal Operations Operating Parameters (pdf) Insertion Devices Flux & Brightness Orbit Stability Lattice Information (pdf) Lattice : MAD Dataset Mechanical Drawing (pdf) VUV Operating Schedule Introduction & History The VUV Ring at the National Synchrotron Light Source was one of the first of the 2nd generation light sources to operate in the world. Initially designed in 1976 the final lattice design was completed in 1978 shortly after funding was approved. Construction started at the beginning of FY 1979 and installation of the magnets was well underway by the end of FY 1980. The first stored beam was achieved in December of 1981 at 600 MeV and the first photons were delivered to beamlines in May 1982, with routine beam line operations underway by the start of FY 1983. The number of beam

80

Storage Ring Operation Modes  

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

Longitudinal bunch profile and Up: APS Storage Ring Parameters Longitudinal bunch profile and Up: APS Storage Ring Parameters Previous: Source Parameter Table Storage Ring Operation Modes Standard Operating Mode, top-up Fill pattern: 102 mA in 24 singlets (single bunches) with a nominal current of 4.25 mA and a spacing of 153 nanoseconds between singlets. Lattice configuration: Low emittance lattice with effective emittance of 3.1 nm-rad and coupling of 1%. Bunch length (rms): 33.5 ps. Refill schedule: Continuous top-up with single injection pulses occurring at a minimum of two minute intervals, or a multiple of two minute intervals. Special Operating Mode - 324 bunches, non top-up Fill pattern: 102 mA in 324 uniformly spaced singlets with a nominal single bunch current of 0.31 mA and a spacing of 11.37 nanoseconds between singlets.

Note: This page contains sample records for the topic "ring compression testing" 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

Compressive sensing of object-signature  

Science Journals Connector (OSTI)

Compressive sensing is a new framework for signal acquisition, compression, and processing. Of specific interest are two-dimensional signals such as images where an optical unit performs the acquisition and compression (i.e., compressive sensing or compressive ... Keywords: compressive imaging, compressive sampling, compressive sensing, digital signal processing, optical super computing

Dan E. Tamir; Natan T. Shaked; Wilhelmus J. Geerts; Shlomi Dolev

2010-11-01T23:59:59.000Z

82

Design Considerations for High Energy Electron -- Positron Storage Rings  

DOE R&D Accomplishments (OSTI)

High energy electron-positron storage rings give a way of making a new attack on the most important problems of elementary particle physics. All of us who have worked in the storage ring field designing, building, or using storage rings know this. The importance of that part of storage ring work concerning tests of quantum electrodynamics and mu meson physics is also generally appreciated by the larger physics community. However, I do not think that most of the physicists working tin the elementary particle physics field realize the importance of the contribution that storage ring experiments can make to our understanding of the strongly interacting particles. I would therefore like to spend the next few minutes discussing the sort of things that one can do with storage rings in the strongly interacting particle field.

Richter, B.

1966-11-00T23:59:59.000Z

83

Muon Cooling: Longitudinal Compression  

Science Journals Connector (OSTI)

A 10??MeV/c positive muon beam was stopped in helium gas of a few mbar in a magnetic field of 5 T. The muon “swarm” has been efficiently compressed from a length of 16 cm down to a few mm along the magnetic field axis (longitudinal compression) using electrostatic fields. The simulation reproduces the low energy interactions of slow muons in helium gas. Phase space compression occurs on the order of microseconds, compatible with the muon lifetime of 2???s. This paves the way for the preparation of a high-quality low-energy muon beam, with an increase in phase space density relative to a standard surface muon beam of 107. The achievable phase space compression by using only the longitudinal stage presented here is of the order of 104.

Yu Bao; Aldo Antognini; Wilhelm Bertl; Malte Hildebrandt; Kim Siang Khaw; Klaus Kirch; Angela Papa; Claude Petitjean; Florian M. Piegsa; Stefan Ritt; Kamil Sedlak; Alexey Stoykov; David Taqqu

2014-06-04T23:59:59.000Z

84

Padding with Compressed Air  

E-Print Network (OSTI)

We commonly find plants using padding to transport liquids or light solids short distances from tankers into storage tanks. Padding can wreck havoc in compressed air systems with limited storage, undersized cleanup equipment (dryers and filters...

Beals, C.

2004-01-01T23:59:59.000Z

85

Mechanical Compression Heat Pumps  

E-Print Network (OSTI)

MECHANICAL COMPRESSION HEAT PUMPS Thomas-L. Apaloo and K. Kawamura Mycom Corporation, Los Angeles, California J. Matsuda, Mayekawa Mfg. Co., Tokyo, Japan ABSTRACT Mechanical compression heat pumping is not new in industrial applications.... In fact, industry history suggests that the theoretical concept was developed before 1825. Heat pump manufacturers gained the support of consultants and end-users when the energy crisis hit this country in 1973. That interest, today, has been...

Apaloo, T. L.; Kawamura, K.; Matsuda, J.

86

Localisation in Enveloping Rings  

Science Journals Connector (OSTI)

......right ideal E of R, 3 an n such that (1) If R is commutative this condition becomes, 3n such that (2) where K(I) = (x\\xcel for some ce#). We say that an ideal / of a ring R has the AR property if, for any right ideal E of R, 3n such that E n......

J. C. McConnell

1968-01-01T23:59:59.000Z

87

Geodesic Motion in the (Charged) Doubly Spinning Black Ring Spacetime  

E-Print Network (OSTI)

In this article we analyze the geodesics of test particles and light in the five dimensional (charged) doubly spinning black ring spacetime. Apparently it is not possible to separate the Hamilton-Jacobi-equation for (charged) doubly spinning black rings in general, so we concentrate on special cases: null geodesics in the ergosphere and geodesics on the two rotational axes of the (charged) doubly spinning black ring. We present analytical solutions to the geodesic equations for these special cases. Using effective potential techniques we study the motion of test particles and light and discuss the corresponding orbits.

Saskia Grunau; Valeria Kagramanova; Jutta Kunz

2012-12-03T23:59:59.000Z

88

AGING BEHAVIOR OF VITON O-RING SEALS IN THE 9975 SHIPPING PACKAGE  

SciTech Connect

The Savannah River Site (SRS) is storing plutonium (Pu) materials in the K-Area Materials Storage (KAMS) facility. The Pu materials were packaged according to the DOE-STD-3013 standard and shipped to the SRS in Type B 9975 packages. The robust 9975 shipping package was not designed for long-term product storage, but it is a specified part of the storage configuration and the KAMS facility safety basis credits the 9975 design with containment. Within the 9975 package, nested stainless steel containment vessels are closed with dual O-ring seals based on Viton{reg_sign} GLT or GLT-S fluoroelastomer. The aging behavior of the O-ring compounds is being studied to provide the facility with advanced notice of nonconformance and to develop life prediction models. A combination of field surveillance, leak testing of surrogate fixtures aged at bounding service temperatures, and accelerated-aging methodologies based on compression stress-relaxation and oxygen consumption analysis is being used to evaluate seal performance. A summary of the surveillance program relative to seal aging behavior is presented.

Skidmore, E.; Daugherty, W.; Hoffman, E.; Dunn, K.; Bellamy, S.

2012-01-13T23:59:59.000Z

89

Accelerated ring laser  

Science Journals Connector (OSTI)

The behavior of a ring laser rotating with nonuniform angular velocity has become of interest, both experimental and theoretical. Within a framework of modest idealizations, we present a classical, relativistically exact theoretical analysis. The beat frequency, we find, is given by an expression of the Sagnac form but with the instantaneous angular velocity in place of the usual constant velocity. One has an "instantaneous Sagnac effect."

Takamasa Takahashi and Ralph Baierlein

1977-02-01T23:59:59.000Z

90

Precooler Ring Vacuum System  

SciTech Connect

The precooler vacuum system, as proposed by FNAL, is based on a suitable modification of the existing Electron Cooling Ring System. Because of the magnetic cycle of the bending magnets, distributed ion pumping, as exists in the Electron Cooling Ring, is not applicable. Instead, the proposed pumping will be done with commercial appendage ion pumps mounted approximately every two meters around the circumference of the ring. The loss of effective pumping speed and non-uniformity of system pressure with appendage pumps may not be major considerations but the large number required does effect experimental and analytical equipment placement considerations. There is a distributed pumping technique available which: (1) is not affected by the magnetic cycle of the bending magnets; (2) will provide a minimum of four times the hydrogen pumping speed of the proposed appendage ion pumps; (3) will require no power during pumping after the strip is activated; (4) will provide the heat source for bakeout; (5) is easily replaceable; and (6) can be purchased, installed, and operated at a generous economic advantage over the presently proposed ion pumped system. The pumping technique referred to is non-evaporable gettering with ST101 Zr/Al pumping strip. A technical description of this pumping strip is given on Data Sheet 1 and 2 attached to this report.

Moenich, J.

1980-10-02T23:59:59.000Z

91

Patrick Ring | Department of Energy  

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

Patrick Ring Patrick Ring About Us Patrick Ring - Team Leader, Benefits Continuity Team Patrick Ring is the team leader for the continuity of contractor pension and postretirement benefit programs for contractor workers formerly employed at DOE closure sites. Mr. Ring has more than 31 years of federal service between the U.S. Department of Energy (DOE), U.S. Department of Defense, and the Pension Benefit Guaranty Corporation. His experience has provided him extensive knowledge and experience in dealing with contractor retirement benefit programs. Mr. Ring joined the Office of Legacy Management (LM) in October 2005 as a contractor industrial relations specialist/actuary and a member of the Benefits Continuity Team. Prior to joining LM, Mr. Ring was employed as an actuary with the Defense

92

Compressed Air Systems | Department of Energy  

Energy Savers (EERE)

Maintenance Strategies for Compressed Air Systems Remove Condensate with Minimal Air Loss Stabilizing System Pressure Compressed Air Training Compressed Air Systems Tools...

93

Compressibility and permeability of clays at high pressure  

E-Print Network (OSTI)

consolidation tests indicate that temperature does not seem to affect the compressibi1ity of bentonite and illite. How- ever, the compressibility of kaolinite increases slightly with an increase in temperature. The effect of temperature on the permeability... on the Compressibility and Permeability of Clay EXPERIMENTAL PROGRAM Equipment Description of Samples Experimental Procedure Page 14 14 17 17 21 23 26 26 29 29 30 32 32 TABLE OF CONTENTS (Continued) DISCUSSION OF THE TEST RESULTS Consolidation...

Lee, Honwoo Thomas

2012-06-07T23:59:59.000Z

94

Solvable Compressible Ising Model  

Science Journals Connector (OSTI)

The results for the solvable Baker-Essam model of a compressible Ising lattice are rederived by utilizing the equivalence of the system to a set of linear chains each described by the Mattis-Schultz one-dimensional magnetostriction model.

Marshall Luban

1973-03-01T23:59:59.000Z

95

Nuclear Compressibility and Symmetry Energy  

Science Journals Connector (OSTI)

A modification and generalization of the Puff-Martin model for many-fermion systems is employed to calculate nuclear compressibility and symmetry energy in order to provide a practical test of the model and at the same time obtain useful information about these interesting quantities. An alternative, heuristic, derivation of the Puff-Martin equations is presented in order to exhibit the role of the exclusion principle. The condition stated for normal nuclear matter is that the mean binding energy be minimal (with respect to variation of the Fermi momentum) rather than the Puff-Martin condition that the mean binding energy equal the "single particle" energy at the Fermi surface. These two quantities differ from each other by the rearrangement energy, which is found to be 10 Mev. Employing Puff's potential (hard-shell potential plus a separable Yamaguchi potential, acting only in relative S states), satisfactory agreement is obtained with observed binding energy and density. The value of nuclear compressibility, 214 Mev, falls within the wide range of semiempirical values. The symmetry energy coefficient, 43 Mev, is larger, by 40-80%, than those usually quoted in semiempirical mass formulas. However, our value of the symmetry coefficient is the same as that calculated by Brueckner and Gammel in the absence of odd-state forces; they found the coefficient to be reduced to 26 Mev when a more realistic potential, including odd-state contributions, is employed.

David S. Falk and Lawrence Wilets

1961-12-15T23:59:59.000Z

96

Compressed Hydrogen Storage Workshop Agenda  

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

Agenda for the first day of the R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen Storage Technologies Workshops on February 14 and 15, 2011.

97

Ring Ring. Who's There? A Wind Expert | Department of Energy  

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

Ring Ring. Who's There? A Wind Expert Ring Ring. Who's There? A Wind Expert Ring Ring. Who's There? A Wind Expert August 23, 2010 - 10:44am Addthis Stephen Graff Former Writer & editor for Energy Empowers, EERE Have a question about wind energy? You're not alone. In 2009, about 1,200 people- ranging from farmers, teachers, county commissioners, developers and green job hopefuls -called or emailed Minnesota-based Windustry's wind hotline to learn more about the renewable energy. "The questions are all over the map," said David Tidball, who has been fielding calls since early 2009. "It's everything from, 'What's a wind turbine look like?' to 'How do I get involved in a wind project of my own?'" Windustry's mission is to provide accurate, unbiased and accessible information to the public about wind energy and help people across the

98

NETL: IEP – CO2 Compression - Novel Concepts for the Compression of Large  

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

Novel Concepts for the Compression of Large Volumes of Carbon Dioxide Novel Concepts for the Compression of Large Volumes of Carbon Dioxide Project No.: FC26-05NT42650 The Southwest Research Institute (SwRI) will design an efficient and cost-effective compression system to reduce the overall cost of carbon dioxide (CO2) capture and storage for coal-based power plants. SwRI will develop two novel concepts that have the potential to reduce CO2 compression power requirements by 35 percent compared to conventional compressor designs. The first concept is a semi-isothermal compression process where the CO2 is continually cooled using an internal cooling jacket rather than using conventional interstage cooling. This concept can potentially reduce power requirements because less energy is required to boost the pressure of a cool gas. The second concept involves the use of refrigeration to liquefy the CO2 so that its pressure can be increased using a pump, rather than a compressor. The primary power requirements are the initial compression required to boost the CO2 to approximately 250 pounds per square inch absolute and the refrigeration power required to liquefy the gaseous CO2. Once the CO2 is liquefied, the pumping power to boost the pressure to pipeline supply pressure is minimal. Prototype testing of each concept will be conducted.

99

Compressed Air System Control Strategies  

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

This tip sheet briefly discusses compressed air system control strategies as a means to improving and maintaining system performance.

100

Compressed Air Energy Storage System  

E-Print Network (OSTI)

/expanders are crucial for the economical viability of a Compressed Air Energy Storage (CAES) system such as the

Farzad A. Shirazi; Mohsen Saadat; Bo Yan; Perry Y. Li; Terry W. Simon

Note: This page contains sample records for the topic "ring compression testing" 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

Analyzing Your Compressed Air System  

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

This tip sheet outlines the process to analyze industrial compressed air systems and ensure proper system configuration.

102

Compressed natural gas measurement issues  

SciTech Connect

The Natural Gas Vehicle Coalition`s Measurement and Metering Task Group (MMTG) was established on July 1st, 1992 to develop suggested revisions to National Institute of Standards & Technology (NIST) Handbook 44-1992 (Specifications, Tolerances, and Other Technical Requirements for Weighing and Measuring Devices) and NIST Handbook 130-1991 (Uniform Laws & Regulations). Specifically, the suggested revisions will address the sale and measurement of compressed natural gas when sold as a motor vehicle fuel. This paper briefly discusses the activities of the MMTG and its interaction with NIST. The paper also discusses the Institute of Gas Technology`s (IGT) support of the MMTG in the area of natural gas composition, their impact on metering technology applicable to high pressure fueling stations as well as conversion factors for the establishment of ``gallon gasoline equivalent`` of natural gas. The final portion of this paper discusses IGT`s meter research activities and its meter test facility.

Blazek, C.F.; Kinast, J.A.; Freeman, P.M.

1993-12-31T23:59:59.000Z

103

Energies of strained silica rings  

Science Journals Connector (OSTI)

The energies of strained two-member and three-member rings of SiO4 tetrahedra are calculated using models based on continuous SiO2 networks. These rings are considered to form highly reactive ``defect'' centers in vitreous SiO2 and at its surface. The calculations are based on a generalized gradient approximation to density-functional theory, and give strain energies of 1.23 and 0.25 eV for two- and three-member rings, considerably smaller than those previously estimated from Hartree-Fock calculations applied to small hydrogen-terminated molecular models. Structural results are compared with experiment for solids and molecules containing such rings. Changes in bond charge densities due to ring strain are illustrated, and modifications of the electronic states of relaxed SiO2 networks caused by strained ring defects are discussed.

D. R. Hamann

1997-06-01T23:59:59.000Z

104

Finding Structure via Compression Jason L. Hutchens  

E-Print Network (OSTI)

Structurevia Compression Jason L. Hutchens and Michael D. Alder (1998) Finding Structure via Compression. In D.M.W

105

Viscosity of Ring Polymer Melts  

Science Journals Connector (OSTI)

Viscosity of Ring Polymer Melts ... The ratio of the zero-shear viscosities of linear polymer melts ?0,linear to their ring counterparts ?0,ring at isofrictional conditions is discussed as a function of the number of entanglements Z. ... For this reason we have determined the viscosities by fitting the complex viscosity curves with different methods to obtain reliable estimates and error bars (see Supporting Information). ...

Rossana Pasquino; Thodoris C. Vasilakopoulos; Youn Cheol Jeong; Hyojoon Lee; Simon Rogers; George Sakellariou; Jürgen Allgaier; Atsushi Takano; Ana R. Brás; Taihyun Chang; Sebastian Gooßen; Wim Pyckhout-Hintzen; Andreas Wischnewski; Nikos Hadjichristidis; Dieter Richter; Michael Rubinstein; Dimitris Vlassopoulos

2013-09-17T23:59:59.000Z

106

Design, analyses and experimental study of a foil gas bearing with compression springs as a compliance support  

E-Print Network (OSTI)

A new foil bearing with compression springs is designed, built, analyzed, and tested. This foil gas bearing uses a series of compression springs as a compliant structure instead of corrugated bump foils. A spring model to estimate the stiffness...

Song, Ju Ho

2009-06-02T23:59:59.000Z

107

Recap Compression Term statistics Dictionary compression Postings compression Web Search and Text Mining  

E-Print Network (OSTI)

as they occur. With these two ideas we can generate a complete inverted index for each block. These separate Mining http://www.cc.gatech.edu/~agray/6240spr11 IIR 5: Index Compression Alexander Gray Georgia Institute of Technology, College of Computing 2011 Gray: Index Compression 1 / 60 #12;Recap Compression Term

Gray, Alexander

108

Improving Floating Point Compression  

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

Improving Improving Floating Point Compression through Binary Masks Leonardo A. Bautista Gomez Argonne National Laboratory Franck Cappello Argonne National Laboratory Abstract-Modern scientific technology such as particle accel- erators, telescopes and supercomputers are producing extremely large amounts of data. That scientific data needs to be processed using systems with high computational capabilities such as supercomputers. Given that the scientific data is increasing in size at an exponential rate, storing and accessing the data is becoming expensive in both, time and space. Most of this scientific data is stored using floating point representation. Scientific applications executed in supercomputers spend a large amount of CPU cycles reading and writing floating point values, making data compression techniques an interesting way to increase computing efficiency.

109

Electrochemical Hydrogen Compression (EHC)  

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

Electrochemical Hydrogen Compression (EHC) Pinakin Patel and Ludwig Lipp Presentation at DOE Hydrogen Compression, Storage and Dispensing Workshop at ANL Argonne, IL March 20, 2013 2 * Experience with all fuel cells - MCFC, SOFC, PEM, PAFC, etc. * Excellent progress in commercialization of MCFC technology (>300 MW installed + backlog, >50 MW per year production rate, 11 MW single site unit in Korea, >1.5 billion kWh produced) * Unique internal reforming technology for high efficiency fuel cells FCE Overview $- $2,000 $4,000 $6,000 $8,000 $10,000 2003 2007 2011 mid-term Product cost per kW 3 H 2 Peak and Back- up Power Fuel Cell Cars DFC ® Power Plant (Electricity + Hydrogen) Solid State Hydrogen Separator (EHS) Solid State Hydrogen

110

Ground Movement in SSRL Ring  

SciTech Connect

Users of the Stanford Synchrotron Radiation Lightsource (SSRL) are being affected by diurnal motion of the synchrotron's storage ring, which undergoes structural changes due to outdoor temperature fluctuations. In order to minimize the effects of diurnal temperature fluctuations, especially on the vertical motion of the ring floor, scientists at SSRL tried three approaches: painting the storage ring white, covering the asphalt in the middle of the ring with highly reflective Mylar and installing Mylar on a portion of the ring roof and walls. Vertical motion in the storage ring is measured by a Hydrostatic Leveling System (HLS), which calculates the relative height of water in a pipe that extends around the ring. The 24-hr amplitude of the floor motion was determined using spectral analysis of HLS data, and the ratio of this amplitude before and after each experiment was used to quantitatively determine the efficacy of each approach. The results of this analysis showed that the Mylar did not have any significant effect on floor motion, although the whitewash project did yield a reduction in overall HLS variation of 15 percent. However, further analysis showed that the reduction can largely be attributed to a few local changes rather than an overall reduction in floor motion around the ring. Future work will consist of identifying and selectively insulating these local regions in order to find the driving force behind diurnal floor motion in the storage ring.

Sunikumar, Nikita; /UCLA /SLAC

2011-08-25T23:59:59.000Z

111

Split ring containment attachment device  

DOE Patents (OSTI)

A containment attachment device 10 for operatively connecting a glovebag 200 to plastic sheeting 100 covering hazardous material. The device 10 includes an inner split ring member 20 connected on one end 22 to a middle ring member 30 wherein the free end 21 of the split ring member 20 is inserted through a slit 101 in the plastic sheeting 100 to captively engage a generally circular portion of the plastic sheeting 100. A collar potion 41 having an outer ring portion 42 is provided with fastening means 51 for securing the device 10 together wherein the glovebag 200 is operatively connected to the collar portion 41.

Sammel, Alfred G. (Pittsburgh, PA)

1996-01-01T23:59:59.000Z

112

Semigroups and ring endomorphisms  

E-Print Network (OSTI)

. Consequently, Im A consists of only the 0 element of R which means that A is the zero map of R. Since this con- tradicts the hypothesis, we conclude that B is not one to one. ~Pttf 1. 2. zf A d B d phd f * r g R such that BB = A or BA = A then Ker B... contradicts the hypothesis. Thus Ker B/ImB ~ft ttd I I . . If B I ~ ** 1 Id ttty d PB- ism of a ring R such that BB ~ B then (1) Ker B P Im B (2) B is not one to one (3) B fixes every element in Im B (4) R is the group direct sum of Im B and Ker B...

McDaniel, Johnnie Carl

2012-06-07T23:59:59.000Z

113

Reversible Seeding in Storage Rings  

SciTech Connect

We propose to generate steady-state microbunching in a storage ring with a reversible seeding scheme. High gain harmonic generation (HGHG) and echo-enabled harmonic generation (EEHG) are two promising methods for microbunching linac electron beams. Because both schemes increase the energy spread of the seeded beam, they cannot drive a coherent radiator turn-by-turn in a storage ring. However, reversing the seeding process following the radiator minimizes the impact on the electron beam and may allow coherent radiation at or near the storage ring repetition rate. In this paper we describe the general idea and outline a proof-of-principle experiment. Electron storage rings can drive high average power light sources, and free-electron lasers (FELs) are now producing coherent light sources of unprecedented peak brightness While there is active research towards high repetition rate FELs (for example, using energy recovery linacs), at present there are still no convenient accelerator-based sources of high repetition rate, coherent radiation. As an alternative avenue, we recently proposed to establish steady-state microbunching (SSMB) in a storage ring. By maintaining steady-state coherent microbunching at one point in the storage ring, the beam generates coherent radiation at or close to the repetition rate of the storage ring. In this paper, we propose a method of generating a microbunched beam in a storage ring by using reversible versions of linac seeding schemes.

Ratner, Daniel; Chao, Alex; /SLAC

2011-12-14T23:59:59.000Z

114

Failure of anisotropic compressible shale  

SciTech Connect

The paper is dealing with a general, invariant, formulation of a failure condition for an anisotropic compressible rock. The invariant formulation is thought in conjunction with a general formulation of a viscoplastic constitutive equation for that rock, where this failure condition will play the role of {open_quotes}short-term{close_quotes} failure condition. The data available (due to H. Niandou and obtained at the laboratory LML Lille URA CNRS 1444 from France) were obtained in triaxial tests and provide the stress at failure for various orientations of the bedding planes with respect to the axial loading direction. We use the well known representation theorem according to which the failure function must depend not only on the invariants of the stress tensor, but also on the mixed invariants: tr M{sigma} and tr M{sigma}{sup 2}, where M = s{sub 1} {direct_product} s{sub 1} and s{sub 1} is the normal to the bedding plane. Using the data we first determine the form of the failure condition formulated in terms of stress invariants, for several orientations of the bedding planes with respect to the direction in which acts the main compressive stress, and which is defined by an angle 0. Then the coefficients of these failure conditions are made functions on this angle 0, which in turn is expressed as a function of the mixed invariants tr M{sigma}{prime} and II{sub {sigma}{prime}} (the second invariant of the stress deviator). All the coefficients involved in this generally formulated criterion are fully determined from the data.

Cazacu, O.; Cristescu, N.D. [Univ. of Flordia, Gainesville, FL (United States)

1995-12-31T23:59:59.000Z

115

Shock compression of precompressed deuterium  

SciTech Connect

Here we report quasi-isentropic dynamic compression and thermodynamic characterization of solid, precompressed deuterium over an ultrafast time scale (< 100 ps) and a microscopic length scale (< 1 {micro}m). We further report a fast transition in shock wave compressed solid deuterium that is consistent with the ramp to shock transition, with a time scale of less than 10 ps. These results suggest that high-density dynamic compression of hydrogen may be possible on microscopic length scales.

Armstrong, M R; Crowhurst, J C; Zaug, J M; Bastea, S; Goncharov, A F; Militzer, B

2011-07-31T23:59:59.000Z

116

Friction between Ring Polymer Brushes  

E-Print Network (OSTI)

Friction between ring-polymer brushes at melt densities sliding past each other are studied using extensive course-grained molecular dynamics simulations and scaling arguments, and the results are compared to the friction between linear-polymer brushes. We show that for a velocity range spanning over three decades, the frictional forces measured for ring-polymer brushes are half the corresponding friction in case of linear brushes. In the linear-force regime, the weak inter-digitation of two ring brushes compared to linear brushes also leads to a lower number of binary collisions between the monomers of opposing brushes. At high velocities, where the thickness of the inter-digitation layer between two opposing brushes is on the order monomer size regardless of brush topology, stretched segments of ring polymers take a double-stranded conformation. As a result, monomers of the double-stranded segments collide less with the monomers of the opposing ring brush even though a similar number of monomers occupies the inter-digitation layer for ring and linear-brush bilayers. The numerical data obtained from our simulations is consistent with the proposed scaling analysis. Conformation-dependent frictional reduction observed in ring brushes can have important consequences in non-equilibrium bulk systems.

A. Erbas; J. Paturej

2015-01-07T23:59:59.000Z

117

A correlation of rock compressibility with temperature and pressure  

E-Print Network (OSTI)

volume compressibilities 14. Decompression test (Core No. 5D and 12D) 15, Decompression test (Core No. 5E and 1062D). , 16. Decompression test (Core No. 3C) . . 17, Pore volume compressibility vs. porosity. 19 20 23 24 25 26 Table s 1. Des c..., psi Figure 4. Cumulative pore volume change/pore volume vs. pressure 14 0. 08 0. 06 0. 0 0. 0 Core No. 5C at 300 F Core No. 5A at 200 F Core No. 5E at 76 F ~'~ ~ ~* ~ Core No. 5B at 400 F (Fi 1 2 4 6 8 10 12 Pressure in thousands, psi...

Choudhary, Bijoy Kumar

2012-06-07T23:59:59.000Z

118

ECG Compression: Fast Block-Sorting Compression John Halloran  

E-Print Network (OSTI)

ECG Compression: Fast Block-Sorting Compression John Halloran Department of Electrical Engineering University of Hawaii at Manoa EE 628 Fall 2008 April 13, 2010 1 Introduction Electrocardiography(ECG. Given ECG data, a patient may be diagnosed with health issues such as a heart attack or improper levels

Noble, William Stafford

119

R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent...  

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

R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen Storage Technologies Workshops R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen...

120

Data Compression with Prime Numbers  

E-Print Network (OSTI)

A compression algorithm is presented that uses the set of prime numbers. Sequences of numbers are correlated with the prime numbers, and labeled with the integers. The algorithm can be iterated on data sets, generating factors of doubles on the compression.

Gordon Chalmers

2005-11-16T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Contemporary Mathematics Wavelet Image Compression  

E-Print Network (OSTI)

fundamental problems in science and engineering, such as audio de-noising, signal compression, object in a way to fit the engineering model of image compression. 1. Introduction Wavelets are functions which and engineering. This thesis focuses on the processing of color images with the use of custom designed wavelet

Song, Myung-Sin

122

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

123

A compression mechanism for sequence databases to improve the efficiency of conventional tools  

Science Journals Connector (OSTI)

......observed compression ratios were performed using Kruskal--Wallis tests as implemented in the SAS program package...divisions from 1988 onwards, as calculated using Kruskal-Wallis tests on differences between ratios achieved with......

R. Doelz; F. Eggenberger

1995-04-01T23:59:59.000Z

124

Ring resonant cavities for spectroscopy  

DOE Patents (OSTI)

Ring-shaped resonant cavities for spectroscopy allow a reduction in optical feedback to the light source, and provide information on the interaction of both s- and p-polarized light with samples. A laser light source is locked to a single cavity mode. An intracavity acousto-optic modulator may be used to couple light into the cavity. The cavity geometry is particularly useful for Cavity Ring-Down Spectroscopy (CRDS). 6 figs.

Zare, R.N.; Martin, J.; Paldus, B.A.; Xie, J.

1999-06-15T23:59:59.000Z

125

Compression effects on pressure loss in flexible HVAC ducts  

SciTech Connect

A study was conducted to evaluate the effect of compression on pressure drop in flexible, spiral wire helix core ducts used in residential and light commercial applications. Ducts of 6 inches, 8 inches and 10 inches (150, 200 and 250 mm) nominal diameters were tested under different compression configurations following ASHRAE Standard 120-1999--Methods of Testing to Determine Flow Resistance of HVAC Air Ducts and Fittings. The results showed that the available published references tend to underestimate the effects of compression. The study demonstrated that moderate compression in flexible ducts, typical of that often seen in field installations, could increase the pressure drop by a factor of four, while further compression could increase the pressure drop by factors close to ten. The results proved that the pressure drop correction factor for compressed ducts cannot be independent of the duct size, as suggested by ASHRAE Fundamentals, and therefore a new relationship was developed for better quantification of the pressure drop in flexible ducts. This study also suggests potential improvements to ASHRAE Standard 120-1999 and provides new data for duct design.

Abushakra, Bass; Walker, Iain S.; Sherman, Max H.

2002-07-01T23:59:59.000Z

126

Natural Gas Compression Technology Improves Transport and Efficiencies,  

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

Natural Gas Compression Technology Improves Transport and Natural Gas Compression Technology Improves Transport and Efficiencies, Lowers Operating Costs Natural Gas Compression Technology Improves Transport and Efficiencies, Lowers Operating Costs May 10, 2012 - 1:00pm Addthis Washington, DC - An award-winning compressor design that decreases the energy required to compress and transport natural gas, lowers operating costs, improves efficiencies and reduces the environmental footprint of well site operations has been developed by a Massachusetts-based company with support from the U.S. Department of Energy (DOE). OsComp Systems designed and tested the novel compressor design with funding from the DOE-supported Stripper Well Consortium, an industry-driven organization whose members include natural gas and petroleum producers,

127

MHK Technologies/Ocean Powered Compressed Air Stations | Open Energy  

Open Energy Info (EERE)

Powered Compressed Air Stations Powered Compressed Air Stations < MHK Technologies Jump to: navigation, search << Return to the MHK database homepage Ocean Powered Compressed Air Stations.png Technology Profile Primary Organization Wave Power Plant Inc Technology Resource Click here Wave Technology Type Click here Point Absorber - Submerged Technology Readiness Level Click here TRL 4 Proof of Concept Technology Description The Ocean Powered Compressed Air Station is a point absorber that uses an air pump to force air to a landbased generator The device only needs 4m water depth and electricity production fluctations through storing energy at a constant air pressure Technology Dimensions Device Testing Date Submitted 13:16.5 << Return to the MHK database homepage Retrieved from

128

Double acting stirling engine piston ring  

DOE Patents (OSTI)

A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby allowing the contact pressure on the ring to be predetermined through the use of a preloaded expander ring.

Howarth, Roy B. (Clifton Park, NY)

1986-01-01T23:59:59.000Z

129

Premix charge, compression ignition combustion system optimization...  

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

Premix charge, compression ignition combustion system optimization Premix charge, compression ignition combustion system optimization Presentation given at DEER 2006, August 20-24,...

130

Quantum Fourier Transform Over Galois Rings  

E-Print Network (OSTI)

Galois rings are regarded as "building blocks" of a finite commutative ring with identity. There have been many papers on classical error correction codes over Galois rings published. As an important warm-up before exploring quantum algorithms and quantum error correction codes over Galois rings, we study the quantum Fourier transform (QFT) over Galois rings and prove it can be efficiently preformed on a quantum computer. The properties of the QFT over Galois rings lead to the quantum algorithm for hidden linear structures over Galois rings.

Yong Zhang

2009-04-16T23:59:59.000Z

131

Advances in compressible turbulent mixing  

SciTech Connect

This volume includes some recent additions to original material prepared for the Princeton International Workshop on the Physics of Compressible Turbulent Mixing, held in 1988. Workshop participants were asked to emphasize the physics of the compressible mixing process rather than measurement techniques or computational methods. Actual experimental results and their meaning were given precedence over discussions of new diagnostic developments. Theoretical interpretations and understanding were stressed rather than the exposition of new analytical model developments or advances in numerical procedures. By design, compressibility influences on turbulent mixing were discussed--almost exclusively--from the perspective of supersonic flow field studies. The papers are arranged in three topical categories: Foundations, Vortical Domination, and Strongly Coupled Compressibility. The Foundations category is a collection of seminal studies that connect current study in compressible turbulent mixing with compressible, high-speed turbulent flow research that almost vanished about two decades ago. A number of contributions are included on flow instability initiation, evolution, and transition between the states of unstable flow onset through those descriptive of fully developed turbulence. The Vortical Domination category includes theoretical and experimental studies of coherent structures, vortex pairing, vortex-dynamics-influenced pressure focusing. In the Strongly Coupled Compressibility category the organizers included the high-speed turbulent flow investigations in which the interaction of shock waves could be considered an important source for production of new turbulence or for the enhancement of pre-existing turbulence. Individual papers are processed separately.

Dannevik, W.P.; Buckingham, A.C.; Leith, C.E. [eds.

1992-01-01T23:59:59.000Z

132

Compressibility of graphene  

Science Journals Connector (OSTI)

We develop a theory for the compressibility and quantum capacitance of disordered monolayer and bilayer graphene, including the full hyperbolic band structure and band gap in the latter case. We include the effects of disorder in our theory, which are of particular importance at the carrier densities near the Dirac point. We account for this disorder statistically using two different averaging procedures: first via averaging over the density of carriers directly, and then via averaging in the density of states to produce an effective density of carriers. We also compare the results of these two models with experimental data, and to do this we introduce a model for interlayer screening which predicts the size of the band gap between the low-energy conduction and valence bands for arbitrary gate potentials applied to both layers of bilayer graphene. We find that both models for disorder give qualitatively correct results for gapless systems, but when there is a band gap in the low-energy band structure, the density of states averaging is incorrect and disagrees with the experimental data.

D. S. L. Abergel; E. H. Hwang; S. Das Sarma

2011-02-28T23:59:59.000Z

133

NSLS Booster & Linac Ring  

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

Booster & Linac Ring Booster & Linac Ring Booster Operating Parameters (pdf) Lattice Information (pdf) Mechanical Drawing (pdf) Standard Operating Mode Electrons are injected into the NSLS storage rings from a 750 MeV booster synchrotron fed by a 120 MeV linac. The electrons are first produced in a 100 KeV triode electron gun. The gun is pulsed at the booster revolution period, 94.6 nsec, seven times per booster cycle. Each pulse is 5 nsec long and supplies about 17 microbunches in the linac. After acceleration in the linac, the beam is injected into the booster on seven successive turns. Multi-turn injection in the booster is accomplished in the following way: The beam is deflected into the booster by a septum magnet. The first linac pulse goes around the booster and returns to the injection point just as

134

General Compression | Open Energy Information  

Open Energy Info (EERE)

Compression Compression Jump to: navigation, search Name General Compression Place Newton, Massachusetts Zip 2458 Product Massachusetts-based developer of compressed air energy storage systems. Coordinates 43.996685°, -87.803724° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.996685,"lon":-87.803724,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

135

Compressed/Liquid Hydrogen Tanks  

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

Currently, DOE's physical hydrogen storage R&D focuses on the development of high-pressure (10,000 psi) composite tanks, cryo-compressed tanks, conformable tanks, and other advanced concepts...

136

Spinning disk for compressive imaging  

Science Journals Connector (OSTI)

We report the first, to the best of our knowledge, experimental implementation of a spinning-disk configuration for high-speed compressive image acquisition. A single rotating mask...

Shen, H; Gan, L; Newman, N; Dong, Y; Li, C; Huang, Y; Shen, Y C

2012-01-01T23:59:59.000Z

137

Compressed Air Audits using AIRMaster  

E-Print Network (OSTI)

Air compressors are a significant industrial energy user and therefore a prime target for industrial energy audits. The project goal was to develop a software tool, AIRMaster, and supporting methodology for performing compressed air system audits...

Wheeler, G. M.; McGill, R. D.; Bessey, E. G.; Vischer, K.

138

Fast Progressive Lossless Image Compression  

E-Print Network (OSTI)

We present a method for progressive lossless compression of still grayscale images that combines the speed of our earlier FELICS method with the progressivity of our earlier MLP method We use MLP s pyramid based pixel ...

Howard, Paul G.; Vitter, Jeffrey Scott

1994-02-01T23:59:59.000Z

139

Beam manipulation and compression using broadband rf systems in the Fermilab Main Injector and Recycler  

SciTech Connect

A novel method for beam manipulation, compression, and stacking using a broad band RF system in circular accelerators is described. The method uses a series of linear voltage ramps in combination with moving barrier pulses to azimuthally compress, expand, or cog the beam. Beam manipulations can be accomplished rapidly and, in principle, without emittance growth. The general principle of the method is discussed using beam dynamics simulations. Beam experiments in the Fermilab Recycler Ring convincingly validate the concept. Preliminary experiments in the Fermilab Main Injector to investigate its potential for merging two ''booster batches'' to produce high intensity proton beams for neutrino and antiproton production are described.

G William Foster et al.

2004-07-09T23:59:59.000Z

140

Modules over principal ideal rings  

E-Print Network (OSTI)

need to note, however, , the difference between the two types of "union" of a set of submodules N 1 of a module N, The first is the "set-theoretic union" con- sisting of representatives of all the distinct elements to be found in the Ni... ideal R, which cons1sts of the elements of the ring. Consider the subset B of R of all elements of the form ra + na, where r and a are ring ele- ments and n is an integer. If rla + nla, r2a + n2a s B, then la + nla 2 2a la r2a + la 2 = (rl - r2)a...

Vieaux, Jules Bellin

2012-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Magnetism in tunable quantum rings  

Science Journals Connector (OSTI)

We have studied the spin structure of circular four-electron quantum rings using tunable confinement potentials. The calculations were done using the exact diagonalization method. Our results indicate that ringlike systems can have oscillatory flips between ferromagnetic and antiferromagnetic behavior as a function of the magnetic field. Furthermore, at constant external magnetic fields there were seen similar oscillatory changes between ferromagnetism and antiferromagnetism when the system parameters were changed. According to our results, the magnetism of quantum rings could be tuned by system parameters.

G. Bårdsen; E. Tölö; A. Harju

2009-11-10T23:59:59.000Z

142

High-Pressure Hydrogen Tank Testing | Department of Energy  

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

Tank Testing High-Pressure Hydrogen Tank Testing Many types of compressed hydrogen tanks have been certified worldwide and demonstrated in several prototype fuel cell...

143

Cavity-locked ring down spectroscopy  

DOE Patents (OSTI)

Distinct locking and sampling light beams are used in a cavity ring-down spectroscopy (CRDS) system to perform multiple ring-down measurements while the laser and ring-down cavity are continuously locked. The sampling and locking light beams have different frequencies, to ensure that the sampling and locking light are decoupled within the cavity. Preferably, the ring-down cavity is ring-shaped, the sampling light is s-polarized, and the locking light is p-polarized. Transmitted sampling light is used for ring-down measurements, while reflected locking light is used for locking in a Pound-Drever scheme.

Zare, Richard N. (Stanford, CA); Paldus, Barbara A. (Stanford, CA); Harb, Charles C. (Palo Alto, CA); Spence, Thomas (Union City, CA)

2000-01-01T23:59:59.000Z

144

PERFORMANCE STUDY OF COMPRESSIVE SAMPLING FOR ECG SIGNAL COMPRESSION IN NOISY AND VARYING SPARSITY ACQUISITION  

E-Print Network (OSTI)

PERFORMANCE STUDY OF COMPRESSIVE SAMPLING FOR ECG SIGNAL COMPRESSION IN NOISY AND VARYING SPARSITY of compressive sam- pling (CS) for ECG compression in telecardiology, when the signal acquisition is noisy transform (TH-DWT), which is the best technique for real-time ECG compression. We show that CS is quite

Durrani, Salman

145

Effect of hardness of the piston ring coating on the wear characteristics of rubbing surfaces  

Science Journals Connector (OSTI)

In marine engines, the wear between the piston-ring face and the ... performance. This study investigates the characteristics of wear arising between both hard and soft piston- ... on-Disk (POD) testing machine c...

Jeong Hwan Jang; Byeong Don Joo; Jae Ho Lee…

2009-12-01T23:59:59.000Z

146

Homogeneous Charge Compression Ignition Free Piston Linear Alternator  

SciTech Connect

An experimental and theoretical investigation of a homogeneous charge compression ignition (HCCI) free piston powered linear alternator has been conducted to determine if improvements can be made in the thermal and conversion efficiencies of modern electrical generator systems. Performance of a free piston engine was investigated using a rapid compression expansion machine and a full cycle thermodynamic model. Linear alternator performance was investigated with a computer model. In addition linear alternator testing and permanent magnet characterization hardware were developed. The development of the two-stroke cycle scavenging process has begun.

Janson Wu; Nicholas Paradiso; Peter Van Blarigan; Scott Goldsborough

1998-11-01T23:59:59.000Z

147

Pattern formation in the exciton inner ring  

Science Journals Connector (OSTI)

We report on the two-beam study of indirect excitons in the inner ring in the exciton emission pattern. One laser beam generates the inner ring and a second weaker beam is positioned in the inner ring. The beam positioned in the inner ring is found to locally suppress the exciton emission intensity. We also report on the inner ring fragmentation and formation of multiple rings in the inner ring region. These features are found to originate from a weak spatial modulation of the excitation beam intensity in the inner ring region. The modulation of exciton emission intensity anticorrelates with the modulation of the laser excitation intensity. The three phenomena—inner ring fragmentation, formation of multiple rings in the inner ring region, and emission suppression by a weak laser beam in the inner ring—have a common feature: a reduction of exciton emission intensity in the region of enhanced laser excitation. This effect is explained in terms of exciton transport and thermalization.

M. Remeika, A. T. Hammack, S. V. Poltavtsev, L. V. Butov, J. Wilkes, A. L. Ivanov, K. L. Campman, M. Hanson, and A. C. Gossard

2013-09-17T23:59:59.000Z

148

Compressed Air Supply Efficiency  

E-Print Network (OSTI)

displacement control flow meter, Aerzna DN 65. Results from these tests are summarized and presented in the graph below: X Axis - % Full Scale 1. Eldridge 8240MPNH Y ? Axis - % Error 2. FCI ST 98 3. Sierra 640S-M8 4... compressor for trimming, the actual performance (CASE Index of 193), was way below that was expected. The results immediately indicated a need for a better sequencing control. In this case, the engineers in this plant set up a new controller with a PLC...

Joseph, B.

2004-01-01T23:59:59.000Z

149

Stabilizer Codes over Frobenius Rings  

E-Print Network (OSTI)

elements so that B = fjxi jx 2 Rg: 20 The addition and multiplication in the ring R will be used to de ne unitary shift and multiplication operators on Cq. Indeed, for each a in R, we de ne a shift operator X(a) : Cq ! Cq by X(a)jxi = jx+ ai for all x...((ajb)) to be the number of indices i such that ai 6= 0 or bi 6= 0. It follows from these de nitions that wt(!cX(a)Z(b)) = swt((ajb)): Let R be a ring with q elements. Let S be a subgroup of Gn. The stabilizer code Fix(S) associated with S is given by Fix(S) = fv 2 Cq...

Nadella, Sushma

2012-07-16T23:59:59.000Z

150

Reflex ring laser amplifier system  

DOE Patents (OSTI)

The invention is a method and apparatus for providing a reflex ring laser system for amplifying an input laser pulse. The invention is particularly useful in laser fusion experiments where efficient production of high-energy and high power laser pulses is required. The invention comprises a large aperture laser amplifier in an unstable ring resonator which includes a combination spatial filter and beam expander having a magnification greater than unity. An input pulse is injected into the resonator, e.g., through an aperture in an input mirror. The injected pulse passes through the amplifier and spatial filter/expander components on each pass around the ring. The unstable resonator is designed to permit only a predetermined number of passes before the amplified pulse exits the resonator. On the first pass through the amplifier, the beam fills only a small central region of the gain medium. On each successive pass, the beam has been expanded to fill the next concentric non-overlapping region of the gain medium.

Summers, M.A.

1983-08-31T23:59:59.000Z

151

Predicting the compressive strength of concrete by spectral bandwidth analysis of nondestructive acoustic measurements  

E-Print Network (OSTI)

with a hydraulic press according to the standard ASTM testing procedures and the compressive strength in pounds per square inch was recorded for each cylinder. This study ran the soundwaves through a set of nine Fast Fourier Transform Filters ranging...

Schneider, Hans Rainer

2012-06-07T23:59:59.000Z

152

Wavelength-tunable optical ring resonators  

DOE Patents (OSTI)

Optical ring resonator devices are disclosed that can be used for optical filtering, modulation or switching, or for use as photodetectors or sensors. These devices can be formed as microdisk ring resonators, or as open-ring resonators with an optical waveguide having a width that varies adiabatically. Electrical and mechanical connections to the open-ring resonators are made near a maximum width of the optical waveguide to minimize losses and thereby provide a high resonator Q. The ring resonators can be tuned using an integral electrical heater, or an integral semiconductor junction.

Watts, Michael R. (Albuquerque, NM); Trotter, Douglas C. (Albuquerque, NM); Young, Ralph W. (Albuquerque, NM); Nielson, Gregory N. (Albuquerque, NM)

2009-11-10T23:59:59.000Z

153

Rings in central-force network dynamics  

Science Journals Connector (OSTI)

The central-force network dynamics model for glasses is extended to treat networks involving small regular rings of bonds. In particular, band-limit formulas are obtained for an A2X3 glass consisting of regular puckered six-membered A3X3 rings. The special case of planar rings is compared with observations on vitreous B2O3. This continuous random network of "boroxol" rings shows improved agreement with experiment over a model not containing rings. The remaining discrepancies illustrate the need to include noncentral forces in the network dynamics of v-B2O3.

F. L. Galeener and M. F. Thorpe

1983-11-15T23:59:59.000Z

154

Wavelength-tunable optical ring resonators  

DOE Patents (OSTI)

Optical ring resonator devices are disclosed that can be used for optical filtering, modulation or switching, or for use as photodetectors or sensors. These devices can be formed as microdisk ring resonators, or as open-ring resonators with an optical waveguide having a width that varies adiabatically. Electrical and mechanical connections to the open-ring resonators are made near a maximum width of the optical waveguide to minimize losses and thereby provide a high resonator Q. The ring resonators can be tuned using an integral electrical heater, or an integral semiconductor junction.

Watts, Michael R. (Albuquerque, NM); Trotter, Douglas C. (Albuquerque, NM); Young, Ralph W. (Albuquerque, NM); Nielson, Gregory N. (Albuquerque, NM)

2011-07-19T23:59:59.000Z

155

Forecourt Storage and Compression Options | Department of Energy  

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

Storage and Compression Options Forecourt Storage and Compression Options Presentation by Mark Richards on forecourt storage and compression options. wkshpstoragerichards.pdf...

156

Cryo-Compressed Hydrogen Storage: Performance and Cost Review...  

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

Cryo-Compressed Hydrogen Storage: Performance and Cost Review Cryo-Compressed Hydrogen Storage: Performance and Cost Review Presented at the R&D Strategies for Compressed,...

157

Fact Sheet: Isothermal Compressed Air Energy Storage (October...  

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

Isothermal Compressed Air Energy Storage (October 2012) Fact Sheet: Isothermal Compressed Air Energy Storage (October 2012) SustainX will demonstrate an isothermal compressed air...

158

Mechanical compression attenuates normal human bronchial epithelial wound healing  

E-Print Network (OSTI)

Open Access Research Mechanical compression attenuatesto the application of mechanical compression in the presenceResults: We found that mechanical compression and scrape

Arold, Stephen P.; Malavia, Nikita; George, Steven C.

2009-01-01T23:59:59.000Z

159

H1616 supplemental compliance test report  

SciTech Connect

Sandia National Laboratories designed the H1616 container for transport of Type B quantities of radioactive materials. During the most recent recertification cycle, questions were raised concerning the ability of drum type containers with locking rings to survive the hypothetical accident sequence when the puncture test was oriented to specifically attack the locking ring. A series of tests has been performed that conclusively demonstrates that the specially designed locking ring on the H1616 performs adequately in this environment.

Glass, R.E.

1998-05-01T23:59:59.000Z

160

Compressive Evaluation in Human Motion Tracking  

Science Journals Connector (OSTI)

The powerful theory of compressive sensing enables an efficient way to recover sparse or compressible signals from non-adaptive, sub-Nyquist-rate linear measurements. In particular, it has been shown that rand...

Yifan Lu; Lei Wang; Richard Hartley; Hongdong Li; Dan Xu

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Video Compression Standards and Quality of Service  

Science Journals Connector (OSTI)

...Article Video Compression Standards and Quality of Service W. Tawbi...into account for the construction of systems handling video representation media. The different existing video compression standards and their coding schemes are analyzed......

W. Tawbi; F. Horn; E. Horlait; J.-B. Stéfani

1993-01-01T23:59:59.000Z

162

Advanced Management of Compressed Air Systems  

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

Find out how a compressed air system works and the benefits of optimal compressed air system performance. This training is designed to help end users as well as industry solution providers learn...

163

Technical Assessment: Cryo-Compressed Hydrogen Storage  

E-Print Network (OSTI)

Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular Applications October 30, 2006 .....................................................................................................................................................................8 APPENDIX A: Review of Cryo-Compressed Hydrogen Storage Systems ......................................................................................18 APPENDIX C: Presentation to the FreedomCAR & Fuel Hydrogen Storage Technical Team

164

Stream programming for image and video compression  

E-Print Network (OSTI)

Video playback devices rely on compression algorithms to minimize storage, transmission bandwidth, and overall cost. Compression techniques have high realtime and sustained throughput requirements, and the end of CPU clock ...

Drake, Matthew Henry

2006-01-01T23:59:59.000Z

165

Compressed Gas Cylinder Safe Handling, Use and  

E-Print Network (OSTI)

Compressed Gas Cylinder Safe Handling, Use and Storage 2012 Workplace Safety and Environmental Protection #12;i College/Unit: Workplace Safety and Environmental Protection Procedure Title: Compressed Gas................................................ 4 7 General Gas Cylinder Information

Saskatchewan, University of

166

Compressed Air Energy Storage for Offshore  

E-Print Network (OSTI)

transmitting peak power levels. A solution to these issues is a novel high-efficiency compressed air energy

Perry Y. Li; Eric Loth; Terrence W. Simon; James D. Van De Ven; Stephen E. Crane

2011-01-01T23:59:59.000Z

167

Preventive Maintenance Strategies for Compressed Air Systems  

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

This tip sheet discusses preventive maintenance strategies for compressed air systems to avoid high equipment repair and replacement costs.

168

Optimization Online - Compressed Sensing Off the Grid  

E-Print Network (OSTI)

Sep 13, 2012 ... Keywords: atomic norm, basis mismatch, compressed sensing, continuous dictionary, line spectral estimation, nuclear norm relaxation, Prony's ...

Gongguo Tang

2012-09-13T23:59:59.000Z

169

Video Compressive Sensing Using Gaussian Mixture Models  

E-Print Network (OSTI)

photography [15, 16, 17, 18]. In particular, [3] introduced the per-pixel programmable compressive camera (P2C

Carin, Lawrence

170

Weibull Effective Area for Hertzian Ring Crack Initiation Stress  

SciTech Connect

Spherical or Hertzian indentation is used to characterize and guide the development of engineered ceramics under consideration for diverse applications involving contact, wear, rolling fatigue, and impact. Ring crack initiation can be one important damage mechanism of Hertzian indentation. It is caused by sufficiently-high, surface-located, radial tensile stresses in an annular ring located adjacent to and outside of the Hertzian contact circle. While the maximum radial tensile stress is known to be dependent on the elastic properties of the sphere and target, the diameter of the sphere, the applied compressive force, and the coefficient of friction, the Weibull effective area too will be affected by those parameters. However, the estimations of a maximum radial tensile stress and Weibull effective area are difficult to obtain because the coefficient of friction during Hertzian indentation is complex, likely intractable, and not known a priori. Circumventing this, the Weibull effective area expressions are derived here for the two extremes that bracket all coefficients of friction; namely, (1) the classical, frictionless, Hertzian case where only complete slip occurs, and (2) the case where no slip occurs or where the coefficient of friction is infinite.

Jadaan, Osama M. [University of Wisconsin, Platteville; Wereszczak, Andrew A [ORNL; Johanns, Kurt E [ORNL

2011-01-01T23:59:59.000Z

171

Wave energy devices with compressible volumes  

Science Journals Connector (OSTI)

...author and source are credited. Wave energy devices with compressible volumes Adi...1BJ, UK We present an analysis of wave energy devices with air-filled compressible...wave period range of about-4s. wave energy|compressible volume|axisymmetric device...

2014-01-01T23:59:59.000Z

172

Outline Inverted File Building Compression for Inverted Files Building and Compression Techniques for Inverted  

E-Print Network (OSTI)

Outline Inverted File Building Compression for Inverted Files Building and Compression Techniques for Inverted Files Roi Blanco Dpt. Computing Science, University of A Coruna December 13, 2005 Roi Blanco Building and Compression Techniques for Inverted Files #12;Outline Inverted File Building Compression

Barreiro, Alvaro

173

ADVANCED RECIPROCATING COMPRESSION TECHNOLOGY (ARCT)  

SciTech Connect

The U.S. natural gas pipeline industry is facing the twin challenges of increased flexibility and capacity expansion. To meet these challenges, the industry requires improved choices in gas compression to address new construction and enhancement of the currently installed infrastructure. The current fleet of installed reciprocating compression is primarily slow-speed integral machines. Most new reciprocating compression is and will be large, high-speed separable units. The major challenges with the fleet of slow-speed integral machines are: limited flexibility and a large range in performance. In an attempt to increase flexibility, many operators are choosing to single-act cylinders, which are causing reduced reliability and integrity. While the best performing units in the fleet exhibit thermal efficiencies between 90% and 92%, the low performers are running down to 50% with the mean at about 80%. The major cause for this large disparity is due to installation losses in the pulsation control system. In the better performers, the losses are about evenly split between installation losses and valve losses. The major challenges for high-speed machines are: cylinder nozzle pulsations, mechanical vibrations due to cylinder stretch, short valve life, and low thermal performance. To shift nozzle pulsation to higher orders, nozzles are shortened, and to dampen the amplitudes, orifices are added. The shortened nozzles result in mechanical coupling with the cylinder, thereby, causing increased vibration due to the cylinder stretch mode. Valve life is even shorter than for slow speeds and can be on the order of a few months. The thermal efficiency is 10% to 15% lower than slow-speed equipment with the best performance in the 75% to 80% range. The goal of this advanced reciprocating compression program is to develop the technology for both high speed and low speed compression that will expand unit flexibility, increase thermal efficiency, and increase reliability and integrity. Retrofit technologies that address the challenges of slow-speed integral compression are: (1) optimum turndown using a combination of speed and clearance with single-acting operation as a last resort; (2) if single-acting is required, implement infinite length nozzles to address nozzle pulsation and tunable side branch absorbers for 1x lateral pulsations; and (3) advanced valves, either the semi-active plate valve or the passive rotary valve, to extend valve life to three years with half the pressure drop. This next generation of slow-speed compression should attain 95% efficiency, a three-year valve life, and expanded turndown. New equipment technologies that address the challenges of large-horsepower, high-speed compression are: (1) optimum turndown with unit speed; (2) tapered nozzles to effectively reduce nozzle pulsation with half the pressure drop and minimization of mechanical cylinder stretch induced vibrations; (3) tunable side branch absorber or higher-order filter bottle to address lateral piping pulsations over the entire extended speed range with minimal pressure drop; and (4) semi-active plate valves or passive rotary valves to extend valve life with half the pressure drop. This next generation of large-horsepower, high-speed compression should attain 90% efficiency, a two-year valve life, 50% turndown, and less than 0.75 IPS vibration. This program has generated proof-of-concept technologies with the potential to meet these ambitious goals. Full development of these identified technologies is underway. The GMRC has committed to pursue the most promising enabling technologies for their industry.

Danny M. Deffenbaugh; Klaus Brun; Ralph E. Harris; J. Pete Harrell; Robert J. Mckee; J. Jeffrey Moore; Steven J. Svedeman; Anthony J. Smalley; Eugene L. Broerman; Robert A Hart; Marybeth G. Nored; Ryan S. Gernentz; Shane P. Siebenaler

2005-12-01T23:59:59.000Z

174

EXPERIMENTS ON FORMING, COMPRESSING AND EXTRACTING ELECTRON RINGS FOR THE COLLECTIVE ACCELERATION OF IONS  

E-Print Network (OSTI)

Rev. Letters 16 (966) 265. J. W. Beal, R. J. Briggs, R. E.1970 (unpublished). J. W. Beal, N. C. Christofilos, and R.

Keefe, D.

2008-01-01T23:59:59.000Z

175

Cooling system for three hook ring segment  

DOE Patents (OSTI)

A triple hook ring segment including forward, midsection and aft mounting hooks for engagement with respective hangers formed on a ring segment carrier for supporting a ring segment panel, and defining a forward high pressure chamber and an aft low pressure chamber on opposing sides of the midsection mounting hook. An isolation plate is provided on the aft side of the midsection mounting hook to form an isolation chamber between the aft low pressure chamber and the ring segment panel. High pressure air is supplied to the forward chamber and flows to the isolation chamber through crossover passages in the midsection hook. The isolation chamber provides convection cooling air to an aft portion of the ring segment panel and enables a reduction of air pressure in the aft low pressure chamber to reduce leakage flow of cooling air from the ring segment.

Campbell, Christian X.; Eng, Darryl; Lee, Ching-Pang; Patat, Harry

2014-08-26T23:59:59.000Z

177

Making Compressed Air System Decisions  

E-Print Network (OSTI)

. Today, modern, high quality manufacturing facilities require a more scientific approach. Many manufacturing processes require strict controls over compressed air pressure, temperature and purity levels. Competitive pressures also force manufacturers...-lubricated cylinder designs. Reciprocating compressor designs remained the standard for industry until the mid 1970s. During the late 1960s and early 1970s, material and manufacturing advances led to the development of 219 Ingersoll-Rand Co. Davidson, N...

Porri, R. E.

178

Compressed air energy storage system  

DOE Patents (OSTI)

An internal combustion reciprocating engine is operable as a compressor during slack demand periods utilizing excess power from a power grid to charge air into an air storage reservoir and as an expander during peak demand periods to feed power into the power grid utilizing air obtained from the air storage reservoir together with combustible fuel. Preferably the internal combustion reciprocating engine is operated at high pressure and a low pressure turbine and compressor are also employed for air compression and power generation.

Ahrens, Frederick W. (Naperville, IL); Kartsounes, George T. (Naperville, IL)

1981-01-01T23:59:59.000Z

179

Chapter 22: Compressed Air Evaluation Protocol  

SciTech Connect

Compressed-air systems are used widely throughout industry for many operations, including pneumatic tools, packaging and automation equipment, conveyors, and other industrial process operations. Compressed-air systems are defined as a group of subsystems composed of air compressors, air treatment equipment, controls, piping, pneumatic tools, pneumatically powered machinery, and process applications using compressed air. A compressed-air system has three primary functional subsystems: supply, distribution, and demand. Air compressors are the primary energy consumers in a compressed-air system and are the primary focus of this protocol. The two compressed-air energy efficiency measures specifically addressed in this protocol are: high-efficiency/variable speed drive (VSD) compressor replacing modulating compressor; compressed-air leak survey and repairs. This protocol provides direction on how to reliably verify savings from these two measures using a consistent approach for each.

Benton, N.

2014-11-01T23:59:59.000Z

180

Modeling and simulation of longitudinal dynamics for Low Energy Ring–High Energy Ring at the Positron-Electron Project  

Science Journals Connector (OSTI)

A time domain dynamic modeling and simulation tool for beam-cavity interactions in the Low Energy Ring (LER) and High Energy Ring (HER) at the Positron-Electron Project (PEP-II) is presented. Dynamic simulation results for PEP-II are compared to measurements of the actual machine. The motivation for this tool is to explore the stability margins and performance limits of PEP-II radio-frequency (RF) systems at future higher currents and upgraded RF configurations. It also serves as a test bed for new control algorithms and can define the ultimate limits of the low-level RF (LLRF) architecture. The time domain program captures the dynamic behavior of the beam-cavity-LLRF interaction based on a reduced model. The ring current is represented by macrobunches. Multiple RF stations in the ring are represented via one or two macrocavities. Each macrocavity captures the overall behavior of all the 2 or 4 cavity RF stations. Station models include nonlinear elements in the klystron and signal processing. This enables modeling the principal longitudinal impedance control loops interacting via the longitudinal beam model. The dynamics of the simulation model are validated by comparing the measured growth rates for the LER with simulation results. The simulated behavior of the LER at increased operation currents is presented via low-mode instability growth rates. Different control strategies are compared and the effects of both the imperfections in the LLRF signal processing and the nonlinear drivers and klystrons are explored.

C. Rivetta; T. Mastorides; J. D. Fox; D. Teytelman; D. Van Winkle

2007-02-21T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Aging of Weapon Seals – An Update on Butyl O-ring Issues  

SciTech Connect

During testing under the Enhanced Surveillance Campaign in 2001, preliminary data detected a previously unknown and potentially serious concern with recently procured butyl o-rings on several programs. All butyl o-rings molded from a proprietary formulation throughout the period circa 1999 through 2001 had less than a full cure. Engineering judgment was that under curing is detrimental and could possibly lead to sub-optimum performance or, in the worst case, premature seal failure. An aging study was undertaken to ensure that suspect o-rings installed in the stockpile will retain sufficient sealing force for a minimum ten-year service life. A new prediction model developed for this study indicates suspect o-rings do not need to be replaced before the ten-year service life. Long-term testing results are reported on a yearly basis to validate the prediction model. This report documents the aging results for the period September 2002 to January 2011.

Wilson, Mark H.

2011-07-13T23:59:59.000Z

182

Rate of Growth of Fungus Rings  

Science Journals Connector (OSTI)

... MR. O. G. S. CRAWFORD'S letter in NATURE of December 26, page 938, concerning the age of fairy rings, seems to warrant a letter ...

J. RAMSBOTTOM

1926-01-30T23:59:59.000Z

183

Status of the SLC damping rings  

SciTech Connect

Electron beams of full design energy 1.21 GeV and nearly full design intensity 4 x 10/sup 10/ particles/pulse (design 5 x 10/sup 10/) have been extracted from the Stanford Linac and successfully stored in the electron damping ring. Beams of less intensity have been extracted from the ring and reinjected into the Linac. The present intensity limits are not thought to be fundamental. The operating experience with the electron ring and the status of the construction of the positron ring will be discussed. 11 refs., 1 fig., 2 tabs.

Hutton, A.M.; Davies-White, W.A.; Delahaye, J.P.; Fieguth, T.H.; Hofmann, A.; Jager, J.; Kloeppel, P.K.; Lee, M.J.; Linebarger, W.A.; Rivkin, L.

1985-06-01T23:59:59.000Z

184

Condenser for illuminating a ring field  

DOE Patents (OSTI)

A series of segments of a parent aspheric mirror having one foci at at a si-point source of radiation and the other foci at the radius of a ring field have all but one or all of their beams translated and rotated by sets of mirrors such that all of the beams pass through the real entrance pupil of a ring field camera about one of the beams and fall onto the ring field radius as a coincident image as an arc of the ring field.

Sweatt, William C. (Albuquerque, NM)

1994-01-01T23:59:59.000Z

185

Condenser for illuminating a ring field  

DOE Patents (OSTI)

A series of segments of a parent aspheric mirror having one foci at a point source of radiation and the other foci at the radius of a ring field have all but one or all of their beams translated and rotated by sets of mirrors such that all of the beams pass through the real entrance pupil of a ring field camera about one of the beams and fall onto the ring field radius as a coincident image as an arc of the ring field. 5 figs.

Sweatt, W.C.

1994-11-01T23:59:59.000Z

186

Universal penetration test apparatus with fluid penetration sensor  

DOE Patents (OSTI)

A universal penetration test apparatus is described for measuring resistance of a material to a challenge fluid. The apparatus includes a pad saturated with the challenge fluid. The apparatus includes a compression assembly for compressing the material between the pad and a compression member. The apparatus also includes a sensor mechanism for automatically detecting when the challenge fluid penetrates the material. 23 figs.

Johnson, P.W.; Stampfer, J.F.; Bradley, O.D.

1999-02-02T23:59:59.000Z

187

Concentric ring flywheel with hooked ring carbon fiber separator/torque coupler  

DOE Patents (OSTI)

A concentric ring flywheel with expandable separators, which function as torque couplers, between the rings to take up the gap formed between adjacent rings due to differential expansion between different radius rings during rotation of the flywheel. The expandable separators or torque couplers include a hook-like section at an upper end which is positioned over an inner ring and a shelf-like or flange section at a lower end onto which the next adjacent outer ring is positioned. As the concentric rings are rotated the gap formed by the differential expansion there between is partially taken up by the expandable separators or torque couplers to maintain torque and centering attachment of the concentric rings.

Kuklo, Thomas C. (Oakdale, CA)

1999-01-01T23:59:59.000Z

188

Steam in the Ring Discharge  

Science Journals Connector (OSTI)

The behaviour of steam and its decomposition products in the ring discharge has been examined. Dry hydrogen is not dissociated. The production of atomic hydrogen is dependent upon the presence of steam which dissociates into hydroxyl and atomic hydrogen. A secondary source of atomic hydrogen is then afforded by the interaction of hydroxyl with molecular hydrogen. The escape from the discharge of atomic hydrogen, a long-lived species, favours the dissociation of steam. Mercury vapour, on the other hand, inhibits the formation of atomic hydrogen and thus leads to a high equilibrium steam concentration. Unlike dry hydrogen, dry oxygen is dissociated into atoms, but these have a short life as such and recombine in the discharge to form molecular oxygen and ozone. The reaction mechanisms occurring in the discharge are discussed in the light of spectrographic results.

G I Finch

1949-01-01T23:59:59.000Z

189

On rings of structural numbers  

E-Print Network (OSTI)

structural numbers over the set X, and let B(X) have the operations defined above with equality also as before. Theorem I. l. If X is any set, then B(X) is a commutative ring with identity. Proof. The structural number 0 is the additive identity element... with identity g. Definition I. 7. If A, B e S(X) then A'B = (P U q ( p e A, q e B, p Il q = &f and p U q can be formed in an odd number of ways). ~E1 t. 4. L t A = (( . b), (bj. 7 )) 4 B = ((b, c), (b), (a)) be in S(X) for some X. Then AD B = {{b, a), {a...

Powell, Wayne Bruce

2012-06-07T23:59:59.000Z

190

Envera Variable Compression Ratio Engine  

SciTech Connect

Aggressive engine downsizing, variable compression ratio and use of the Atkinson cycle are being combined to improve fuel economy by up to 40 percent relative to port fuel injected gasoline engines, while maintaining full engine power. Approach Engine downsizing is viewed by US and foreign automobile manufacturers as one of the best options for improving fuel economy. While this strategy has already demonstrated a degree of success, downsizing and fuel economy gains are currently limited. With new variable compression ratio technology however, the degree of engine downsizing and fuel economy improvement can be greatly increased. A small variable compression ratio (VCR) engine has the potential to return significantly higher vehicle fuel economy while also providing high power. Affordability and potential for near term commercialization are key attributes of the Envera VCR engine. VCR Technology To meet torque and power requirements, a smaller engine needs to do more work per stroke. This is typically accomplished by boosting the incoming charge with either a turbo or supercharger so that more energy is present in the cylinder per stroke to do the work. With current production engines the degree of engine boosting (which correlates to downsizing) is limited by detonation (combustion knock) at high boost levels. Additionally, the turbo or supercharger needs to be responsive and efficient while providing the needed boost. VCR technology eliminates the limitation of engine knock at high load levels by reducing compression ratio to {approx}9:1 (or whatever level is appropriate) when high boost pressures are needed. By reducing the compression ratio during high load demand periods there is increased volume in the cylinder at top dead center (TDC) which allows more charge (or energy) to be present in the cylinder without increasing the peak pressure. Cylinder pressure is thus kept below the level at which the engine would begin to knock. When loads on the engine are low the compression ratio can be raised (to as much as 18:1) providing high engine efficiency. It is important to recognize that for a well designed VCR engine cylinder pressure does not need to be higher than found in current production turbocharged engines. As such, there is no need for a stronger crankcase, bearings and other load bearing parts within the VCR engine. The Envera VCR mechanism uses an eccentric carrier approach to adjust engine compression ratio. The crankshaft main bearings are mounted in this eccentric carrier or 'crankshaft cradle' and pivoting the eccentric carrier 30 degrees adjusts compression ratio from 9:1 to 18:1. The eccentric carrier is made up of a casting that provides rigid support for the main bearings, and removable upper bearing caps. Oil feed to the main bearings transits through the bearing cap fastener sockets. The eccentric carrier design was chosen for its low cost and rigid support of the main bearings. A control shaft and connecting links are used to pivot the eccentric carrier. The control shaft mechanism features compression ratio lock-up at minimum and maximum compression ratio settings. The control shaft method of pivoting the eccentric carrier was selected due to its lock-up capability. The control shaft can be rotated by a hydraulic actuator or an electric motor. The engine shown in Figures 3 and 4 has a hydraulic actuator that was developed under the current program. In-line 4-cylinder engines are significantly less expensive than V engines because an entire cylinder head can be eliminated. The cost savings from eliminating cylinders and an entire cylinder head will notably offset the added cost of the VCR and supercharging. Replacing V6 and V8 engines with in-line VCR 4-cylinder engines will provide high fuel economy at low cost. Numerous enabling technologies exist which have the potential to increase engine efficiency. The greatest efficiency gains are realized when the right combination of advanced and new technologies are packaged together to provide the greatest gains at the least cost. Aggressive engine downsiz

Charles Mendler

2011-03-15T23:59:59.000Z

191

Basic Properties of Compressible MHD Turbulence: Implications for Molecular Clouds  

E-Print Network (OSTI)

Recent advances in understanding of the basic properties of compressible Magnetohydrodynamic (MHD) turbulence call for revisions of some of the generally accepted concepts. First, MHD turbulence is not so messy as it is usually believed. In fact, the notion of strong non-linear coupling of compressible and incompressible motions is not tenable. Alfven, slow and fast modes of MHD turbulence follow their own cascades and exhibit degrees of anisotropy consistent with theoretical expectations. Second, the fast decay of turbulence is not related to the compressibility of fluid. Rates of decay of compressible and incompressible motions are very similar. Third, viscosity by neutrals does not suppress MHD turbulence in a partially ionized gas. Instead, MHD turbulence develops magnetic cascade at scales below the scale at which neutrals damp ordinary hydrodynamic motions. The implications of those changes of MHD turbulence paradigm for molecular clouds require further studies. Those studies can benefit from testing of theoretical predictions using new statistical techniques that utilize spectroscopic data. We briefly discuss advances in development of tools using which the statistics of turbulent velocity can be recovered from observations.

A. Lazarian; J. Cho

2003-11-17T23:59:59.000Z

192

STATUS OF THE NEUTRALIZED DRIFT COMPRESSION EXPERIMENT (NDCX-II)  

SciTech Connect

The Neutralized Drift Compression Experiment (NDCX-II) is an 11 M$ induction accelerator project currently in construction at Lawrence Berkeley National Laboratory for warm dense matter (WDM) experiments investigating the interaction of ion beams with matter at elevated temperature and pressure. The machine consists of a lithium injector, induction accelerator cells, diagnostic cells, a neutralized drift compression line, a final focus solenoid, and a target chamber. The induction cells and some of the pulsed power systems have been reused from the decommissioned Advanced Test Accelerator at Lawrence Livermore National Laboratory after refurbishment and modification. The machine relies on a sequence of acceleration waveforms to longitudinally compress the initial ion pulse from 600 ns to less than 1 ns in {approx} 12 m. Radial confinement of the beam is achieved with 2.5 T pulsed solenoids. In the initial hardware configuration, 50 nC of Li{sup +} will be accelerated to 1.25 MeV and allowed to drift-compress to a peak current of {approx}40 A. The project started in the summer of 2009. Construction of the accelerator will be completed in the fall of 2011 and will provide a worldwide unique opportunity for ion-driven warm dense matter experiments as well as research related to novel beam manipulations for heavy ion fusion drivers.

Waldron, W.L.; Kwan, J.W.

2011-04-21T23:59:59.000Z

193

Liner surface improvements for low friction piston ring packs  

Science Journals Connector (OSTI)

The development of engine components in the automotive industry is governed by several constraints such as environmental legislation and customer expectations. About a half of the frictional losses in an internal combustion engine come from the interactions between the piston assembly and cylinder liner surface. The tribological considerations in the contact between the piston ring and cylinder liner have attracted much attention over the past few decades. Many non-conventional cylinder liner finishes have been, and are being, developed with the aim to reduce friction losses and oil consumption, but the effects of the surface finish on piston ring pack performance is not well understood. One way of reducing friction in the cylinder system is to reduce the tangential load from the piston ring pack, focusing on the oil control ring. However, the side-effect of this is a disappointingly increased oil consumption. In this study a number of different cylinder liner surface specifications were developed and implemented in test engines with the aim of maintaining the level for oil consumption when decreasing the tangential load for the piston ring pack. To improve our understanding of the result, the same surfaces were evaluated in elastic and elasto-plastic rough contact and hydrodynamic flow simulation models. It is shown that oil consumption is strongly related to surface texture on the cylinder liners and at lower speeds (900–1200 rpm), a 'rougher surface' with a high core (e.g. Sk) and valley roughness (e.g. Svk) results in higher oil consumption. At the medium speed range (1200–3600 rpm), oil consumption continues to dominate for the 'rough' surfaces but with a visible influence of a lower oil consumption for a decreased roughness within the 'rough' surface group. 'Smooth' surfaces with a 'smooth' core (Sk), irrespective of the valley component (Svk), show similar oil consumption. For engine speeds above 3600 rpms, an increase in plateau roughness results in higher oil consumption. Throughout the study, standard roughness parameters were computed to compare with the results from engine testing and simulation. Future work will be directed to continuous optimization between oil consumption and friction. Improving the understanding of the functional cylinder system surfaces' ability to form oil films in the cylinder system opens up opportunities, not only in reducing the tangential load of piston ring packs but also in optimizing oil viscosity in order to reduce friction.

C Anderberg; Z Dimkovski; B-G Rosén

2014-01-01T23:59:59.000Z

194

Bernstein instability driven by thermal ring distribution  

SciTech Connect

The classic Bernstein waves may be intimately related to banded emissions detected in laboratory plasmas, terrestrial, and other planetary magnetospheres. However, the customary discussion of the Bernstein wave is based upon isotropic thermal velocity distribution function. In order to understand how such waves can be excited, one needs an emission mechanism, i.e., an instability. In non-relativistic collision-less plasmas, the only known Bernstein wave instability is that associated with a cold perpendicular velocity ring distribution function. However, cold ring distribution is highly idealized. The present Brief Communication generalizes the cold ring distribution model to include thermal spread, so that the Bernstein-ring instability is described by a more realistic electron distribution function, with which the stabilization by thermal spread associated with the ring distribution is demonstrated. The present findings imply that the excitation of Bernstein waves requires a sufficiently high perpendicular velocity gradient associated with the electron distribution function.

Yoon, Peter H., E-mail: yoonp@umd.edu [Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742 (United States); School of Space Research, Kyung Hee University, Yongin-Si, Gyeonggi-Do 446-701 (Korea, Republic of); Hadi, Fazal; Qamar, Anisa [Institute of Physics and Electronics, University of Peshawar, Peshawar 25000 (Pakistan)

2014-07-15T23:59:59.000Z

195

Industrial Compressed Air System Energy Efficiency Guidebook.  

SciTech Connect

Energy efficient design, operation and maintenance of compressed air systems in industrial plants can provide substantial reductions in electric power and other operational costs. This guidebook will help identify cost effective, energy efficiency opportunities in compressed air system design, re-design, operation and maintenance. The guidebook provides: (1) a broad overview of industrial compressed air systems, (2) methods for estimating compressed air consumption and projected air savings, (3) a description of applicable, generic energy conservation measures, and, (4) a review of some compressed air system demonstration projects that have taken place over the last two years. The primary audience for this guidebook includes plant maintenance supervisors, plant engineers, plant managers and others interested in energy management of industrial compressed air systems.

United States. Bonneville Power Administration.

1993-12-01T23:59:59.000Z

196

FY2002 Progress Report for Fuels for Advanced Compression Ignition Direct Injection (CIDI) Engines  

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

Fuels for Advanced Compression Fuels for Advanced Compression Ignition Direct Injection (CIDI) Engines Energy Efficiency and Renewable Energy Office of FreedomCAR and Vehicle Technologies Approved by Stephen Goguen November 2002 Fuels for Advanced CIDI Engines FY 2002 Progress Report iii CONTENTS CONTENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii INDEX OF PRIMARY CONTACTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v I. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 II. FUEL/LUBRICANT EFFECTS TESTING ON ENGINE PERFORMANCE . . . . . . . . . 13 A. Oil Consumption Contribution to CIDI PM Emissions during Transient Operation . . . . . . . . . . . . . . . . . . . .13

197

Non-Vapor Compression HVAC Technologies Report  

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

While vapor-compression technologies have served heating, ventilation, and air-conditioning (HVAC) needs very effectively, and have been the dominant HVAC technology for close to 100 years, the conventional refrigerants used in vapor-compression equipment contribute to global climate change when released to the atmosphere. The Building Technologies Office is evaluating low-global warming potential (GWP) alternatives to vapor-compression technologies.

198

Sandia National Laboratories: percussive drilling with compressed...  

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

with compressed air Sandia and Atlas-Copco Secoroc Advance to Phase 2 in Their Geothermal Energy Project On July 31, 2013, in Energy, Geothermal, News, News & Events,...

199

Stoichiometric Compression Ignition (SCI) Engine Concept | Department...  

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

More Documents & Publications An Experimental Investigation of the Origin of Increased NOx Emissions When Fueling a Heavy-Duty Compression-Ignition Engine with...

200

The surface energy and the compressibility  

SciTech Connect

This paper discusses the relationship between surface energy and compressibility as they relate to the nucleus. 5 refs., 4 figs. (LSP)

Myers, W.D.

1990-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Optimization of Storage vs. Compression Capacity  

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

This presentation by Amgad Elgowainy of Argonne National Laboratory was given at the DOE Hydrogen Compression, Storage, and Dispensing Workshop in March 2013.

202

Energy efficiency improvements in Chinese compressed airsystems  

SciTech Connect

Industrial compressed air systems use more than 9 percent ofall electricity used in China. Experience in China and elsewhere hasshown that these systems can be much more energy efficient when viewed asa whole system and rather than as isolated components.This paper presentsa summary and analysis of several compressed air system assessments.Through these assessments, typical compressed air management practices inChina are analyzed. Recommendations are made concerning immediate actionsthat China s enterprises can make to improve compressed air systemefficiency using best available technology and managementstrategies.

McKane, Aimee; Li, Li; Li, Yuqi; Taranto, T.

2007-06-01T23:59:59.000Z

203

Compressed Air Energy Storage Act (Kansas)  

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

This act lays out regulations for the local authorities related to site selection, design, operation and monitoring for underground storage of compressed air.

204

The Viscosity of Compressed Gases  

Science Journals Connector (OSTI)

New data and a new theory for the viscosity of compressed gases are presented. Data for nitrogen, hydrogen and a mixture of these gases are given, in the calculation of which, the "end effects" are not neglected as has been done in the past. Previous viscosity data are of doubtful validity owing to neglect of this factor. The theory is based on an analogy between the kinetic pressure and viscosity of a gas and is derived using an equation of state of the Lorentz type. Allowance is made for the difference between the viscosity and compressibility covolumes. The theory is substantiated experimentally and further confirmed by the recalculation of other data on the variation of Reynolds' criterion with the pressure, which is here shown to be constant. The mixture data offer a direct opportunity of comparing the Lorentz and linear rules for the calculation of the covolume of a mixture from the covolumes of the components and such comparison indicates that the Lorentz rule is not to be preferred. The substantiation of the new theory is the first direct proof of the validity of the separate treatment of the kinetic and cohesive pressures in the equation of state.

James H. Boyd; Jr.

1930-05-15T23:59:59.000Z

205

Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas Fueling Stations to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas Fueling Stations on AddThis.com... More in this section... Natural Gas Basics Benefits & Considerations Stations Locations Infrastructure Development Compressed Natural Gas Stations

206

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Deregulation to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Compressed Natural Gas (CNG) Deregulation

207

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Deregulation to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Compressed Natural Gas (CNG) Deregulation

208

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Deregulation to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Deregulation on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Compressed Natural Gas (CNG) Deregulation

209

Divide, Compress and Conquer: Querying XML via Partitioned Path-Based Compressed Data Blocks  

Science Journals Connector (OSTI)

We propose a novel partition path-based (PPB) grouping strategy to store compressed XML data in a stream of blocks. In addition, we employ a minimal indexing scheme called block statistic signature (BSS) on the compressed data, which is a simple but ... Keywords: cost model, data compression, markup languages, query processing

Wilfred Ng; Ho-Lam Lau; Aoying Zhou

2008-06-01T23:59:59.000Z

210

Molecular Model of the Contractile Ring  

E-Print Network (OSTI)

We present a model for the actin contractile ring of adherent animal cells. The model suggests that the actin concentration within the ring and consequently the power that the ring exerts both increase during contraction. We demonstrate the crucial role of actin polymerization and depolymerization throughout cytokinesis, and the dominance of viscous dissipation in the dynamics. The physical origin of two phases in cytokinesis dynamics ("biphasic cytokinesis") follows from a limitation on the actin density. The model is consistent with a wide range of measurements of the midzone of dividing animal cells.

D. Biron; E. Alvarez-Lacalle; Tsvi Tlusty; Elisha Moses

2010-08-05T23:59:59.000Z

211

? compression in the SO(5) scheme  

Science Journals Connector (OSTI)

It is shown that a ?-dependent compression of energy levels occurs in most SO(6)-like nuclei, where ? is the SO(5) quantum number. We suggest that this compression represents a generalization of the Coriolis antipairing effect to symmetries other than SU(3), and that it is effectively described by an SO(6)-plus-pairing model.

Xing-Wang Pan; Da Hsuan Feng; Jin-Quan Chen; Michael W. Guidry

1994-05-01T23:59:59.000Z

212

Entropy Adaptive On-Line Compression  

Science Journals Connector (OSTI)

Self-Organization is based on adaptivity. Adaptivity should start with the very basic fundamental communication tasks such as encoding the information to be transmitted or stored. Obviously, the less signal transmitted the less energy in transmission ... Keywords: On-line compression, adaptive compression

Shlomi Dolev, Sergey Frenkel, Marina Kopeetsky

2014-08-01T23:59:59.000Z

213

Digital Audio Compression By Davis Yen Pan  

E-Print Network (OSTI)

Digital Audio Compression By Davis Yen Pan Abstract Compared to most digital data types, with the exception of digital video, the data rates associ- ated with uncompressed digital audio are substan- tial. Digital audio compression enables more effi- cient storage and transmission of audio data. The many forms

Lazar, Aurel A.

214

Quantum Data Compression of a Qubit Ensemble  

E-Print Network (OSTI)

Data compression is a ubiquitous aspect of modern information technology, and the advent of quantum information raises the question of what types of compression are feasible for quantum data, where it is especially relevant given the extreme difficulty involved in creating reliable quantum memories. We present a protocol in which an ensemble of quantum bits (qubits) can in principle be perfectly compressed into exponentially fewer qubits. We then experimentally implement our algorithm, compressing three photonic qubits into two. This protocol sheds light on the subtle differences between quantum and classical information. Furthermore, since data compression stores all of the available information about the quantum state in fewer physical qubits, it could provide a vast reduction in the amount of quantum memory required to store a quantum ensemble, making even today's limited quantum memories far more powerful than previously recognized.

Lee A. Rozema; Dylan H. Mahler; Alex Hayat; Peter S. Turner; Aephraim M. Steinberg

2014-10-15T23:59:59.000Z

215

The positron accumulator ring for the APS  

SciTech Connect

The Positron Accumulator Ring (PAR) is designed to accumulate and damp positrons from the 450-MeV linac during the 0.5-s cycle time of the injector synchrotron for the APS 7-GeV storage ring. During 0.4 s of each synchrotron cycle, up to 24 linac pulses are injected into the horizontal phase space of the PAR at a 60-Hz rate. Each injected pulse occupies about 1.3 of the circumference of the accumulator ring. After 0.1 s for longitudinal damping, the single accumulated bunch is transferred to one of the 353-MHz buckets of the injector synchrotron RF system. The bunch is accelerated to 7 GeV and transferred to the storage ring, while the PAR accumulates the next bunch of positrons. 2 refs., 3 figs., 2 tabs.

Crosbie, E.A.

1989-01-01T23:59:59.000Z

216

RingCentral Mailboxes | Department of Energy  

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

Description RingCentral Mailboxes Responsible Contacts Bruce Murray HR Policy Advisor E-mail bruce.murray@hq.doe.gov Phone 202-586-3372 More Documents & Publications...

217

The MAX IV storage ring project  

Science Journals Connector (OSTI)

The design of the MAX IV 3 GeV ultralow-emittance storage ring is presented and the implementation of solutions to the technological challenges imposed by the compact multi-bend achromat lattice are described.

Tavares, P.F.

2014-08-27T23:59:59.000Z

218

‘Optimal’ vortex rings and aquatic propulsion mechanisms  

Science Journals Connector (OSTI)

...vortex rings and aquatic propulsion mechanisms P. F. Linden...fluid mechanics behind these propulsion mechanisms and show that...over the cycle. 4. FISH PROPULSION BY UNDULATORY SWIMMING Most marine organisms have only discrete...

2004-01-01T23:59:59.000Z

219

Storage rings for spin-polarized hydrogen  

Science Journals Connector (OSTI)

A strong-focusing storage ring is proposed for the long-term magnetic confinement of a collisional gas of neutral spin-polarized hydrogen atoms in the |a? and |b? hyperfine states. The...

Thompson, D; Lovelace, R V E; Lee, D M

1989-01-01T23:59:59.000Z

220

Low thermal expansion seal ring support  

DOE Patents (OSTI)

Today, the trend is to increase the temperature of operation of gas turbine engines. To cool the components with compressor discharge air, robs air which could otherwise be used for combustion and creates a less efficient gas turbine engine. The present low thermal expansion sealing ring support system reduces the quantity of cooling air required while maintaining life and longevity of the components. Additionally, the low thermal expansion sealing ring reduces the clearance "C","C'" demanded between the interface between the sealing surface and the tip of the plurality of turbine blades. The sealing ring is supported by a plurality of support members in a manner in which the sealing ring and the plurality of support members independently expand and contract relative to each other and to other gas turbine engine components.

Dewis, David W. (San Diego, CA); Glezer, Boris (Del Mar, CA)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Power Ring LLC | Open Energy Information  

Open Energy Info (EERE)

Ring LLC Ring LLC Jump to: navigation, search Name Power Ring LLC Place Goleta, California Zip 93117 Product Power Ring is a power storage technology developer working on technology developed by parent firm LaunchPoint Technologies. Coordinates 34.435682°, -119.824105° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.435682,"lon":-119.824105,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

222

The endomorphism near ring on D?  

E-Print Network (OSTI)

THE FNDOMORPHISM NEAR RING ON Dg A Thesis by Fdgar Raymond Guthrie Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTFR OF SCIENCE ~A 1969 (Month) (Year) Major... Subject: Mathematics THE ENDOMORPHISM NEAR RING ON Dg A Thesis by Edgar Raymond Guthrie Approved as to style and content by: (Cha' of Committee) (YAead of Department) (Member) (Member) (Member) (Member) ~AA 1969 (Month) (Year) ABSTRACT...

Guthrie, Edgar Raymond

1969-01-01T23:59:59.000Z

223

Determine the Cost of Compressed Air for Your Plant | Department...  

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

Determine the Cost of Compressed Air for Your Plant Determine the Cost of Compressed Air for Your Plant This tip sheet discusses a method for determining the cost of compressed air...

224

Molecular Model of the Ring-Opening and Ring-Closure Reaction of a Fluorinated Indolylfulgide  

Science Journals Connector (OSTI)

Next, the role of the seam is elucidated by focusing on the energetic and structural characteristics of two further CoIns from that seam, one in the closed-ring region (CoInC) and one in the open-ring region (CoIncZc/tZc). ... A similar constellation is found at the open-ring side, where CoIncZc/tZc could be located (Figure 6, bottom). ... ring opening process in pyrrole has been investigated by performing classical on-the-fly dynamics using the multiconfiguration SCF method for the computation of energies and energy gradients. ...

Artur Nenov; Wolfgang J. Schreier; Florian O. Koller; Markus Braun; Regina de Vivie-Riedle; Wolfgang Zinth; Igor Pugliesi

2012-09-29T23:59:59.000Z

225

Pressure Relief Devices for Compressed Hydrogen Vehicle Fuel Containers  

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

CSA Standards HPRD1-2009 CSA Standards HPRD1-2009 Temporary Interim Requirement For Pressure Relief Devices For Compressed Hydrogen Vehicle Fuel Containers Published - August 2009 3 5.6 General Hydrogen Service Suitability 5.6.1 General. The purpose of this test is to demonstrate suitability of pressure relief devices in hydrogen service. The pressure relief devices will be selected to be in compliance with Section 5.1 and representative of normal production. NOTE: This series of performance tests may not guarantee that all cases and conditions of service will be validated; it is still incumbent on the designer/builder to carefully screen materials of construction for their intended use. Test Method. The general hydrogen service suitability test sequence will be performed on nine devices.

226

Diesol: an alternative fuel for compression ignition engines  

SciTech Connect

Physical properties including specific gravity, kinematic viscosity, heat of combustion, flash point, cetane number and distillation curves are presented for several blends of No. 2 diesel fuel and soybean oil. The mixture is referred to as Diesol. The soybean oil received a minimal amount of refining by water-washing to remove most of the lecithin type gums. The Diesol fuels were tested in a Cooperative Fuel Research single cylinder diesel test engine to determine the short time engine performance using soybean oil as a diesel fuel extender. Brake specific fuel consumption, volumetric fuel consumption, exhaust smoke opacity and power were determined. Various blends of Diesol were also tested in a multicylinder diesel commercial power system. Results are presented to show the comparison between Diesol blends and diesel fuel. The fuel properties and engine performance test results indicate that soybean oil would be a viable extender of diesel fuel for compression-ignition engines.

Cochran, B.J.; Baldwin, J.D.C.; Daniel, L.R. Jr.

1981-01-01T23:59:59.000Z

227

Test Automation Test Automation  

E-Print Network (OSTI)

Test Automation Test Automation Mohammad Mousavi Eindhoven University of Technology, The Netherlands Software Testing 2013 Mousavi: Test Automation #12;Test Automation Outline Test Automation Mousavi: Test Automation #12;Test Automation Why? Challenges of Manual Testing Test-case design: Choosing inputs

Mousavi, Mohammad

228

TEST SYSTEM FOR EVALUATING SPENT NUCLEAR FUEL BENDING STIFFNESS AND VIBRATION INTEGRITY  

SciTech Connect

Transportation packages for spent nuclear fuel (SNF) must meet safety requirements specified by federal regulations. For normal conditions of transport, vibration loads incident to transport must be considered. This is particularly relevant for high-burnup fuel (>45 GWd/MTU). As the burnup of the fuel increases, a number of changes occur that may affect the performance of the fuel and cladding in storage and during transportation. The mechanical properties of high-burnup de-fueled cladding have been previously studied by subjecting defueled cladding tubes to longitudinal (axial) tensile tests, ring-stretch tests, ring-compression tests, and biaxial tube burst tests. The objective of this study is to investigate the mechanical properties and behavior of both the cladding and the fuel in it under vibration/cyclic loads similar to the sustained vibration loads experienced during normal transport. The vibration loads to SNF rods during transportation can be characterized by dynamic, cyclic, bending loads. The transient vibration signals in a specified transport environment can be analyzed, and frequency, amplitude and phase components can be identified. The methodology being implemented is a novel approach to study the vibration integrity of actual SNF rod segments through testing and evaluating the fatigue performance of SNF rods at defined frequencies. Oak Ridge National Laboratory (ORNL) has developed a bending fatigue system to evaluate the response of the SNF rods to vibration loads. A three-point deflection measurement technique using linear variable differential transformers is used to characterize the bending rod curvature, and electromagnetic force linear motors are used as the driving system for mechanical loading. ORNL plans to use the test system in a hot cell for SNF vibration testing on high burnup, irradiated fuel to evaluate the pellet-clad interaction and bonding on the effective lifetime of fuel-clad structure bending fatigue performance. Technical challenges include pure bending implementation, remote installation and detachment of the SNF test specimen, test specimen deformation measurement, and identification of a driving system suitable for use in a hot cell. Surrogate test specimens have been used to calibrate the test setup and conduct systematic cyclic tests. The calibration and systematic cyclic tests have been used to identify test protocol issues prior to implementation in the hot cell. In addition, cyclic hardening in unidirectional bending and softening in reverse bending were observed in the surrogate test specimens. The interface bonding between the surrogate clad and pellets was found to impact the bending response of the surrogate rods; confirming this behavior in the actual spent fuel segments will be an important aspect of the hot cell test implementation,

Wang, Jy-An John [ORNL] [ORNL; Wang, Hong [ORNL] [ORNL; Bevard, Bruce Balkcom [ORNL] [ORNL; Howard, Rob L [ORNL] [ORNL; Flanagan, Michelle [U.S. Nuclear Regulatory Commission] [U.S. Nuclear Regulatory Commission

2013-01-01T23:59:59.000Z

229

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Rebate  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Vehicle Rebate - Metropolitan Utilities District to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Rebate - Metropolitan Utilities District on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Rebate - Metropolitan Utilities District on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Rebate - Metropolitan Utilities District on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Rebate - Metropolitan Utilities District on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Rebate - Metropolitan Utilities District on Digg Find More places to share Alternative Fuels Data Center: Compressed

230

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Fueling Infrastructure Development to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Development on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Development on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Development on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Development on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Development on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Development on AddThis.com...

231

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Fueling Infrastructure Inspection to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Inspection on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Inspection on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Inspection on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Inspection on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Inspection on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Fueling Infrastructure Inspection on AddThis.com...

232

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Vehicle Aftermarket Conversion Requirements to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Aftermarket Conversion Requirements on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Aftermarket Conversion Requirements on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Aftermarket Conversion Requirements on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Aftermarket Conversion Requirements on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Aftermarket Conversion Requirements on Digg Find More places to share Alternative Fuels Data Center: Compressed

233

High-Efficiency Clean Combustion Design for Compression Ignition...  

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

High-Efficiency Clean Combustion Design for Compression Ignition Engines High-Efficiency Clean Combustion Design for Compression Ignition Engines Presentation given at DEER 2006,...

234

Hydrocarbon fouling of SCR during Premixed Charge Compression...  

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

Hydrocarbon fouling of SCR during Premixed Charge Compression Ignition (PCCI) combustion Hydrocarbon fouling of SCR during Premixed Charge Compression Ignition (PCCI) combustion...

235

Fuel Cell Technologies Program Overview: 2012 DOE Hydrogen Compression...  

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

Fuel Cell Technologies Program Overview: 2012 DOE Hydrogen Compression, Storage, and Dispensing Workshop Fuel Cell Technologies Program Overview: 2012 DOE Hydrogen Compression,...

236

Business Case for Compressed Natural Gas in Municipal Fleets...  

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

Business Case for Compressed Natural Gas in Municipal Fleets Business Case for Compressed Natural Gas in Municipal Fleets This report describes how NREL used the CNG Vehicle and...

237

EA-1976: Emera CNG, LLC Compressed Natural Gas Project, Florida...  

Energy Savers (EERE)

1976: Emera CNG, LLC Compressed Natural Gas Project, Florida EA-1976: Emera CNG, LLC Compressed Natural Gas Project, Florida SUMMARY This EA will evaluate the potential...

238

Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons...  

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

Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons Learned for the Safe Deployment of Vehicles Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels,...

239

A Natural Gas, High Compression Ratio, High Efficiency ICRE ...  

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

A Natural Gas, High Compression Ratio, High Efficiency ICRE A Natural Gas, High Compression Ratio, High Efficiency ICRE Using natural gas and gasoline modeling, indications are...

240

Regulated Emissions from Diesel and Compressed Natural Gas Transit...  

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

Emissions from Diesel and Compressed Natural Gas Transit Buses Regulated Emissions from Diesel and Compressed Natural Gas Transit Buses Poster presentaiton at the 2007 Diesel...

Note: This page contains sample records for the topic "ring compression testing" 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

NJ Compressed Natural Gas Refuse Trucks, Shuttle Buses and Infrastruct...  

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

NJ Compressed Natural Gas Refuse Trucks, Shuttle Buses and Infrastructure NJ Compressed Natural Gas Refuse Trucks, Shuttle Buses and Infrastructure 2012 DOE Hydrogen and Fuel Cells...

242

Cryo-Compressed Hydrogen Storage: Performance and Cost Review  

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

Presented at the R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen Storage Technologies Workshops on February 14 and 15, 2011.

243

Rapid Compression Machine ? A Key Experimental Device to Effectively...  

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

Rapid Compression Machine A Key Experimental Device to Effectively Collaborate with Basic Energy Sciences Rapid Compression Machine A Key Experimental Device to Effectively...

244

Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular...  

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

Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular Applications Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular Applications Technical report...

245

Technical Assessment of Compressed Hydrogen Storage Tank Systems...  

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

Technical Assessment of Compressed Hydrogen Storage Tank Systems for Automotive Applications Technical Assessment of Compressed Hydrogen Storage Tank Systems for Automotive...

246

Technical Assessment of Cryo-Compressed Hydrogen Storage Tank...  

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

Technical Assessment of Cryo-Compressed Hydrogen Storage Tank Systems for Automotive Applications Technical Assessment of Cryo-Compressed Hydrogen Storage Tank Systems for...

247

Characterization of Dual-Fuel Reactivity Controlled Compression...  

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

Dual-Fuel Reactivity Controlled Compression Ignition (RCCI) Using Hydrated Ethanol and Diesel Fuel Characterization of Dual-Fuel Reactivity Controlled Compression Ignition (RCCI)...

248

Analyses of Compressed Hydrogen On-Board Storage Systems  

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

Presented at the R&D Strategies for Compressed, Cryo-Compressed and Cryo-Sorbent Hydrogen Storage Technologies Workshops on February 14 and 15, 2011.

249

The Completion of an Archimedean f-Ring  

Science Journals Connector (OSTI)

......archimedean /-ring has a completion; in fact, every such ring...and closed sets in SC. THE COMPLETION OF AN ABCHIMEDEAN /-RING...there is a point ye% and and index AeA such that/A(y...Theorem except LEMMA 3. The completion of an archimedean f-ring......

D. G. Johnson

1965-01-01T23:59:59.000Z

250

Tune measurement in the APS ring  

SciTech Connect

The APS system will contain three rings. The first is a positron accumulator ring (PAR). Its function is to coalesce 24, 30-ns-long positron bunches into one 290-ps bunch. The second is the injector synchrotron (IS). It accelerates the 450-MeV positron bunches to 7 Gev for injection into the storage ring (SR). Betatron and synchrotron motion frequently occurs in circular machines, without any deliberate excitation. However, the amplitudes of this motion cannot be predicted. Therefore, it is desirable to have controlled ways to excite these modes. Two types of devices will be used to excite the beam. One will be a magnetic kicker or bumper. All rings already have these devices planned for the horizontal direction for injecting and extracting beams. Some of these magnets will be used for exiting horizontal betatron motion. In the storage ring, a special kicker will be installed to produce up to 1 mm amplitude motion in the vertical direction. Two 8.4-in striplines (SL) (1/4 wavelength at 352 MHz) will be installed on all rings. One stripline in each ring will be used to drive all three tunes, and the other stripline will be used as a pickup. In the PAR and IS, the pickup stripline will be in a dispersive region. This will allow observation of both betatron and synchrotron motions. In the SR, the stripline will be in a nondispersive region because it is not practical to install it in a dispersive region. To do synchrotron tune measurements in the SR, one of the button BPMs located in a dispersive region will be used. To minimize development effort, as much of the BPM system electronics as possible will be used in the tune measurement system. The BPM electronics uses the AMP/PM conversion technique. This system operates at 352 MHz. Thus, tune measurement components were also designed to operate at 352 MHz.

Sellyey, W.; Kahana, E.; Wang, X.

1993-07-01T23:59:59.000Z

251

Compressed Gas Safety for Experimental Fusion Facilities  

SciTech Connect

Experimental fusion facilities present a variety of hazards to the operators and staff. There are unique or specialized hazards, including magnetic fields, cryogens, radio frequency emissions, and vacuum reservoirs. There are also more general industrial hazards, such as a wide variety of electrical power, pressurized air, and cooling water systems in use, there are crane and hoist loads, working at height, and handling compressed gas cylinders. This paper outlines the projectile hazard assoicated with compressed gas cylinders and mthods of treatment to provide for compressed gas safety. This information should be of interest to personnel at both magnetic and inertial fusion experiments.

Lee C. Cadwallader

2004-09-01T23:59:59.000Z

252

Compressive sensing for nuclear security.  

SciTech Connect

Special nuclear material (SNM) detection has applications in nuclear material control, treaty verification, and national security. The neutron and gamma-ray radiation signature of SNMs can be indirectly observed in scintillator materials, which fluoresce when exposed to this radiation. A photomultiplier tube (PMT) coupled to the scintillator material is often used to convert this weak fluorescence to an electrical output signal. The fluorescence produced by a neutron interaction event differs from that of a gamma-ray interaction event, leading to a slightly different pulse in the PMT output signal. The ability to distinguish between these pulse types, i.e., pulse shape discrimination (PSD), has enabled applications such as neutron spectroscopy, neutron scatter cameras, and dual-mode neutron/gamma-ray imagers. In this research, we explore the use of compressive sensing to guide the development of novel mixed-signal hardware for PMT output signal acquisition. Effectively, we explore smart digitizers that extract sufficient information for PSD while requiring a considerably lower sample rate than conventional digitizers. Given that we determine the feasibility of realizing these designs in custom low-power analog integrated circuits, this research enables the incorporation of SNM detection into wireless sensor networks.

Gestner, Brian Joseph

2013-12-01T23:59:59.000Z

253

Long-term evaluation of fluoroelastomer O-rings in UF/sub 6/  

SciTech Connect

A major component in the gaseous centrifuge enrichment plant (GCEP) was fluoroelastomer O-rings, which were used to seal the uranium hexafluoride (UF/sub 6/) gas system. A program utilizing accelerated test conditions was used to help identify the best material out of four selected candidates and to predict the service life of these materials at GCEP conditions. The tests included accelerated temperatures, mechanical stress, and UF/sub 6/ exposure. Data were evaluated using the Newman--Keuls/sup 1/ ranking system to identify the best material and a zero-order reaction rate equation to help predict service life. This presentation includes a description of the test facility, the materials tested, the types of tests, objectives of the study, service life predictions, and conclusions. The O-rings are predicted to last approx. 30 years, and a high-molecular-weight polymer had the best performance ranking.

Russell, R.G.; Otey, M.G.; Dippo, G.L.

1986-05-01T23:59:59.000Z

254

Understanding the Basics of Compressed Air Systems  

E-Print Network (OSTI)

, contaminated filters, conversion to electrically operated hoists, and the use of centrifugal fans or compressed air with pressure regulators to purge control cabinets. Finally, a review of compressor technologies with typical cfm, pressure ranges, and price...

Herron, D. J.

255

New Regenerative Cycle for Vapor Compression Refrigeration  

Office of Scientific and Technical Information (OSTI)

Flashing Liquid Flow, Int. J. Multiphase Flow, Vol. 22, No.3, 1996, pp.473-483 7. Smith I.K., Stosic, N.R., The Expressor: An Efficiency Boost to Vapour Compression Systems...

256

Compressing Propositional Refutations Using Subsumption Hasan Amjad  

E-Print Network (OSTI)

Compressing Propositional Refutations Using Subsumption Hasan Amjad University of Cambridge Computer Laboratory 15 J J Thomson Avenue, Cambridge CB3 0FD, UK Hasan.Amjad@cl.cam.ac.uk Abstract We

Miller, Alice

257

Compressed Air Load Reduction Approaches and Innovations  

E-Print Network (OSTI)

are assessed. It is a common practice in facilities to simply add compressor capacity when faced with supply pressure or volume deficiencies, increasing the energy consumption associated with compressed air systems in industry. Additionally, in recent years...

D'Antonio, M.; Epstein, G.; Moray, S.; Schmidt, C.

2005-01-01T23:59:59.000Z

258

Error Modeling for Hierarchical Lossless Image Compression  

E-Print Network (OSTI)

We present a new method for error modeling applicable to the MLP algorithm for hierarchical lossless image compression. This method, based on a concept called the variability index, provides accurate models for pixel ...

Howard, Paul G.; Vitter, Jeffrey Scott

1992-01-01T23:59:59.000Z

259

Ramp Compression Experiments - a Sensitivity Study  

SciTech Connect

We present the first sensitivity study of the material isentropes extracted from ramp compression experiments. We perform hydrodynamic simulations of representative experimental geometries associated with ramp compression experiments and discuss the major factors determining the accuracy of the equation of state information extracted from such data. In conclusion, we analyzed both qualitatively and quantitatively the major experimental factors that determine the accuracy of equations of state extracted from ramp compression experiments. Since in actual experiments essentially all the effects discussed here will compound, factoring out individual signatures and magnitudes, as done in the present work, is especially important. This study should provide some guidance for the effective design and analysis of ramp compression experiments, as well as for further improvements of ramp generators performance.

Bastea, M; Reisman, D

2007-02-26T23:59:59.000Z

260

Training: Compressed Air Systems | Department of Energy  

Energy Savers (EERE)

of Compressed Air Systems - 1-day workshop Availability: Onsite instructor-led and web edition (four, two-hour, live webinars make up the web edition training) Find out how a...

Note: This page contains sample records for the topic "ring compression testing" 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

Data Compression for Nearly-Periodic Data  

Science Journals Connector (OSTI)

Shape from shade and Hartmann sensing require plenty of pixels for measurement, but many fewer can be analyzed, saving space and time. We found a method to compress large-format camera...

Talmi, Amos; Ribak, Erez N

262

Parametric internal waves in a compressible fluid  

E-Print Network (OSTI)

We describe the effect of vibration on a confined volume of fluid which is density stratified due to its compressibility. We show that internal gravity-acoustic waves can be parametrically destabilized by the vibration. The resulting instability is similar to the classic Faraday instability of surface waves, albeit modified by the compressible nature of the fluid. It may be possible to observe experimentally near a gas-liquid critical point.

Kausik S. Das; Stephen W. Morris; A. Bhattacharyay

2007-10-11T23:59:59.000Z

263

Parametric internal waves in a compressible fluid  

E-Print Network (OSTI)

We describe the effect of vibration on a confined volume of fluid which is density stratified due to its compressibility. We show that internal gravity-acoustic waves can be parametrically destabilized by the vibration. The resulting instability is similar to the classic Faraday instability of surface waves, albeit modified by the compressible nature of the fluid. It may be possible to observe experimentally near a gas-liquid critical point.

Das, Kausik S; Bhattacharyay, A

2007-01-01T23:59:59.000Z

264

Compressed Air Systems Audits - Why? And How?  

E-Print Network (OSTI)

% of the compressed air costs, most with little or no capital investment. Almost always, in the event of a capital outlay, energy savings alone afford less than one-year payback. Many energy utility companies energetically support these efforts, and some.... Secondly, join us in the definition of compressed air as a system, the totality of which is comprised of the Supply Side and the Demand Side. The Supply Side is the compressors and their controls, receivers (primary storage tanks), aftercoolers, filters...

Kemp, H. L.

2004-01-01T23:59:59.000Z

265

Shock compression of nonideal plasmas at megabars  

Science Journals Connector (OSTI)

Physical properties of hot dense matter at hundreds gigapascal pressures are considered. The new experimental results on pressure ionization of hot matter generated by multiple shock compression of hydrogen and noble gases are presented. The low-frequency electrical conductivity of shock-compressed hydrogen, helium and xenon plasmas was measured. A sharp increase in the electrical conductivity of strongly nonideal plasma was recorded and theoretical models were invoked to describe this increase.

V E Fortov; V B Mintsev

2005-01-01T23:59:59.000Z

266

Lossy compression of weak lensing data  

Future orbiting observatories will survey large areas of sky in order to constrain the physics of dark matter and dark energy using weak gravitational lensing and other methods. Lossy compression of the resultant data will improve the cost and feasibility of transmitting the images through the space communication network. We evaluate the consequences of the lossy compression algorithm of Bernstein et al. (2010) for the high-precision measurement of weak-lensing galaxy ellipticities. This square-root algorithm compresses each pixel independently, and the information discarded is by construction less than the Poisson error from photon shot noise. For simulated space-based images (without cosmic rays) digitized to the typical 16 bits per pixel, application of the lossy compression followed by image-wise lossless compression yields images with only 2.4 bits per pixel, a factor of 6.7 compression. We demonstrate that this compression introduces no bias in the sky background. The compression introduces a small amount of additional digitization noise to the images, and we demonstrate a corresponding small increase in ellipticity measurement noise. The ellipticity measurement method is biased by the addition of noise, so the additional digitization noise is expected to induce a multiplicative bias on the galaxies measured ellipticities. After correcting for this known noise-induced bias, we find a residual multiplicative ellipticity bias of m {approx} -4 x 10{sup -4}. This bias is small when compared to the many other issues that precision weak lensing surveys must confront, and furthermore we expect it to be reduced further with better calibration of ellipticity measurement methods.

Vanderveld, R Ali [Chicago U., EFI; Caltech /Caltech, JPL; Bernstein, Gary M [Pennsylvania U.; Stoughton, Chris [Fermilab; Rhodes, Jason [Caltech; Caltech, JPL; Massey, Richard [Royal Observ., Edinburgh; Dobke, Benjamin M [Caltech; Caltech, JPL

2011-06-01T23:59:59.000Z

267

UNDERSTANDING THE EFFECTS OF COMPRESSION AND CONSTRAINTS ON WATER UPTAKE OF FUEL-CELL MEMBRANES  

SciTech Connect

Accurate characterization of polymer-electrolyte fuel cells (PEFCs) requires understanding the impact of mechanical and electrochemical loads on cell components. An essential aspect of this relationship is the effect of compression on the polymer membrane?s water-uptake behavior and transport properties. However, there is limited information on the impact of physical constraints on membrane properties. In this paper, we investigate both theoretically and experimentally how the water uptake of Nafion membrane changes under external compression loads. The swelling of a compressed membrane is modeled by modifying the swelling pressure in the polymer backbone which relies on the changes in the microscopic volume of the polymer. The model successfully predicts the water content of the compressed membrane measured through in-situ swelling-compression tests and neutron imaging. The results show that external mechanical loads could reduce the water content and conductivity of the membrane, especially at lower temperatures, higher humidities, and in liquid water. The modeling framework and experimental data provide valuable insight for the swelling and conductivity of constrained and compressed membranes, which are of interest in electrochemical devices such as batteries and fuel cells.

Kusoglu, Ahmet; Kienitz, Briian; Weber, Adam

2011-08-24T23:59:59.000Z

268

REVIEW OF AGING DATA ON EPDM O-RINGS IN THE H1616 SHIPPING PACKAGE  

SciTech Connect

Currently, all H1616 shipping package containers undergo annual re-verification testing, including containment vessel leak testing to verify leak-tightness (<1 x 10{sup -7} ref cc/sec air) as per ANSI N14.5. The purpose of this literature review is to supplement aging studies currently being performed by SRNL on the EPDM O-rings to provide the technical basis for extending annual re-verification testing for the H1616 shipping package and to predict the life of the seals at bounding service conditions. The available data suggest that the EPDM O-rings can retain significant mechanical properties and sealing force at or below bounding service temperatures (169 F or 76 C) beyond the 1 year maintenance period. Interpretation of available data suggests that a service life of at least 2 years and potentially 4-6 years may be possible at bounding temperatures. Seal lifetimes at lower, more realistic temperatures will likely be longer. Being a hydrocarbon elastomer, EPDM O-rings may exhibit an inhibition period due to the presence of antioxidants. Once antioxidants are consumed, mechanical properties and seal performance could decline at a faster rate. Testing is being performed to validate the assumptions outlined in this report and to assess the long-term performance of O-ring seals under actual service conditions.

Skidmore, E.

2012-03-27T23:59:59.000Z

269

SNS Ring, Spallation Neutron Source, SNS  

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

RING RING Lattice Version 1.0 in MAD structure Version 1.1: SNSRing.v.1.1 | 623_620_00.mad Version 1.2 SNSRing.v.1.2 | 623_620_00.mad Matching example MAD optics outputs UAL compatible input example Schematic (one super-period) and mechanical drawing Diagnostics Impedance budget Magnets List and mechanical parameters Mechanical drawings Magnetic field modeling and measurements Installation and survey Power supplies summary and changes Polarity conventions tech.memo and schematic (A polarity) Magnet assemblies Documentation ASAC review presentations DOE review presentations SNS/BNL tech.notes, conference and journal papers SNS/ORNL papers SNS project documentation Other links SNS ring aperture, collimation and beam losses SNS transfer lines SNS/BNL Accelerator Physics SNS/ORNL Accelerator Physics

270

Photoneutron production inside the APS Storage Ring  

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

4 4 Neutron Fluence Estimates Inside the APS Storage Ring During Normal Operation P.K. Job and J. Alderman Advanced Photon Source Argonne National Laboratory April 2002 Neutron Fluence Estimates Inside the APS Storage Ring During Normal Operation P.K. Job and J. Alderman Advanced Photon Source Argonne National Laboratory April 2002 Introduction In an electron storage ring, neutrons are generated as a result of the electron beam interaction with high-Z materials, such as scrapers and collimators [1]. When the energy of the incident electron beam is sufficiently high, it can produce high-energy photons, which subsequently interact with a nucleus, resulting in the emission of nucleons. This interaction is known as a photonuclear interaction. For photons with energies above the

271

CHALLENGES FOR THE SNS RING ENERGY UPGRADE  

SciTech Connect

The Oak Ridge Spallation Neutron Source accumulator ring presently operates at a beam power of about 1 MW with a beam energy of about 910 MeV. A power upgrade is planned to increase the beam energy to 1.3 GeV. For the accumulator ring this mostly involves modifications to the injection and extraction sections. A variety of modifications to the existing injection section were necessary to achieve 1 MW, and the tools developed and the lessons learned from this work are now being applied to the design of the new injection section. This paper will discuss the tools and the lessons learned, and also present the design and status of the upgrades to the accumulator ring.

Plum, Michael A [ORNL; Gorlov, Timofey V [ORNL; Holmes, Jeffrey A [ORNL; Hunter, W Ted [ORNL; Roseberry, Jr., R Tom [ORNL; Wang, Jian-Guang [ORNL

2012-01-01T23:59:59.000Z

272

Coherence and persistent currents in mesoscopic rings  

Science Journals Connector (OSTI)

We calculate, to first order in the screened electron-electron interaction, the grand potential and the equilibrium current in a mesoscopic normal-metal ring threaded by a magnetic flux. The average current in an ensemble of such rings is found to be periodic in the flux with period h/2e, and to be given at zero temperature in order of magnitude by I?evFl/L2, where l is the mean free path and L the circumference of the ring. Interference between time-reversed paths, as in the theory of weak localization, is the crucial ingredient. The effect decreases exponentially with temperature on a scale determined by the coherence energy ?hD/L2, where D is the electronic diffusion constant. The results are in good agreement with recent measurements.

Vinay Ambegaokar and Ulrich Eckern

1990-07-16T23:59:59.000Z

273

On cohomology rings of infinite groups.  

E-Print Network (OSTI)

Let R be any ring (with 1), \\Gamma a group and R\\Gamma the corresponding group ring. Let Ext_{R\\Gamma}^{*}(M,M) be the cohomology ring associated to the R\\Gamma-module M. Let H be a subgroup of finite index of \\Gamma. The following is a special version of our main Theorem: Assume the profinite completion of \\Gamma is torsion free. Then an element \\zeta in Ext_{R\\Gamma}^{*}(M,M) is nilpotent (under Yoneda's product) if and only if its restriction to Ext_{RH}^{*}(M,M)$ is nilpotent. In particular this holds for the Thompson group. There are torsion free groups for which the analogous statement is false.

Eli Aljadeff

274

Characterization of Gulf of Mexico Clay Using Automated Triaxial Testing  

E-Print Network (OSTI)

, consolidations tests) and the stress history of the deposit is evaluated. The SHANSEP reconsolidation technique was used for a comprehensive program of Koconsolidated-undrained (CKoU) triaxial compression and extension tests at overconsolidation ratios (OCR...

Murali, Madhuri

2012-02-14T23:59:59.000Z

275

Technical Assessment: Cryo-Compressed Hydrogen Storage for Vehicular Applications  

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

DOE technical assessment of cryo-compressed hydrogen storage for vehicular applications during 2006-2008.

276

Partially compressed-encrypted domain robust JPEG image watermarking  

Science Journals Connector (OSTI)

Digital media is often handled in a compressed and encrypted form in Digital Asset Management Systems. And watermarking of the compressed encrypted media items in the compressed-encrypted domain itself is required sometimes for copyright violation detection ... Keywords: Compressed-encrypted domain watermarking, JPEG watermarking

A. V. Subramanyam, Sabu Emmanuel

2014-08-01T23:59:59.000Z

277

INTEGRATION OF WIND TURBINES WITH COMPRESSED AIR ENERGY STORAGE  

E-Print Network (OSTI)

and an unpredictable nature, can be overcome. After an overview on storage systems, the Compressed Air

I. Arsie; V. Marano; G. Rizzo; M. Moran

278

Ground Ring Of Two Dimensional String Theory  

E-Print Network (OSTI)

String theories with two dimensional space-time target spaces are characterized by the existence of a ``ground ring'' of operators of spin $(0,0)$. By understanding this ring, one can understand the symmetries of the theory and illuminate the relation of the critical string theory to matrix models. The symmetry groups that arise are, roughly, the area preserving diffeomorphisms of a two dimensional phase space that preserve the fermi surface (of the matrix model) and the volume preserving diffeomorphisms of a three dimensional cone. The three dimensions in question are the matrix eigenvalue, its canonical momentum, and the time of the matrix model.

Edward Witten

1991-08-16T23:59:59.000Z

279

Alternative Fuels Data Center: Reduced Compressed Natural Gas (CNG) Fueling  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Reduced Compressed Reduced Compressed Natural Gas (CNG) Fueling Infrastructure Lease - AGL to someone by E-mail Share Alternative Fuels Data Center: Reduced Compressed Natural Gas (CNG) Fueling Infrastructure Lease - AGL on Facebook Tweet about Alternative Fuels Data Center: Reduced Compressed Natural Gas (CNG) Fueling Infrastructure Lease - AGL on Twitter Bookmark Alternative Fuels Data Center: Reduced Compressed Natural Gas (CNG) Fueling Infrastructure Lease - AGL on Google Bookmark Alternative Fuels Data Center: Reduced Compressed Natural Gas (CNG) Fueling Infrastructure Lease - AGL on Delicious Rank Alternative Fuels Data Center: Reduced Compressed Natural Gas (CNG) Fueling Infrastructure Lease - AGL on Digg Find More places to share Alternative Fuels Data Center: Reduced

280

Dissociative recombination: Results from storage rings  

SciTech Connect

The focus of this article is on the measurement of product branching ratios in the dissociative recombination of polyatomic molecular ions with electrons by means of ion storage rings. Recombination of ions of interest in astrophysics, plasma-assisted combustion, thermonuclear fusion, protein fragmentation, and atmospheric physics are reviewed and discussed.

Larsson, Mats [Department of Physics, AlbaNova, Stockholm University, Stockholm, SE-106 91 (Sweden)

2005-05-27T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Correction magnets for the Fermilab Recycler Ring  

SciTech Connect

In the commissioning of the Fermilab Recycler ring the need for higher order corrector magnets in the regions near beam transfers was discovered. Three types of permanent magnet skew quadrupoles, and two types of permanent magnet sextupoles were designed and built. This paper describes the need for these magnets, the design, assembly, and magnetic measurements.

James T Volk et al.

2003-05-27T23:59:59.000Z

282

Knot localization in adsorbing polymer rings  

E-Print Network (OSTI)

We study by Monte Carlo simulations a model of knotted polymer ring adsorbing onto an impenetrable, attractive wall. The polymer is described by a self-avoiding polygon (SAP) on the cubic lattice. We find that the adsorption transition temperature, the crossover exponent $\\phi$ and the metric exponent $\

B. Marcone; E. Orlandini; A. L. Stella

2007-09-10T23:59:59.000Z

283

Persistent Currents in Normal Metal Rings  

Science Journals Connector (OSTI)

...C) the 793-nm array for T = 323 mK, {theta} = 6°; and (D) the 418-nm ring for 365 mK, {theta} = 45°. In each case, a smooth...using measurements of the PC to search for ultra–low temperature phase transitions (6...

A. C. Bleszynski-Jayich; W. E. Shanks; B. Peaudecerf; E. Ginossar; F. von Oppen; L. Glazman; J. G. E. Harris

2009-10-09T23:59:59.000Z

284

RF SYSTEM FOR THE SNS ACCUMULATOR RING.  

SciTech Connect

During accumulation the RF beam current in the spallation neutron source ring rises from 0 to 50 amperes. A clean, 250 nanosecond gap is needed for the extraction kicker risetime. Large momentum spread and small peak current are needed to prevent instabilities and stopband related losses. A robust RF system meeting these requirements has been designed.

BLASKIEWICZ, M.; BRENNAN, J.M.; BRODOWSKI, J.; DELONG, J.; METH, M.; SMITH, K.; ZALTSMAN, A.

2001-06-18T23:59:59.000Z

285

Two-Phase Isentropic Compressibility and Two-Phase Sonic Velocity for  

E-Print Network (OSTI)

and sonic velocity are used for a wide range of problems in the production and exploration of hydrocarbon in well testing, metering, and seismic exploration. In this work, a thermo- dynamic model is presented defined on the basis of the thermody- namic path. For an isothermal process, the compressibility relates

Firoozabadi, Abbas

286

Application-specific compression for time delay estimation in sensor networks  

Science Journals Connector (OSTI)

Sensor networks have emerged as a fundamentally new tool for monitoring inaccessible environments. They are distinguished from traditional sensors by strict limitations on system bandwidth and sensor energy resources. These constraints motivate the use ... Keywords: array processing, compression, hypothesis testing, mutual information, processing-aware, sensor networks, time delay estimation

Lavanya Vasudevan; Antonio Ortega; Urbashi Mitra

2003-11-01T23:59:59.000Z

287

CRYOGENIC AND VACUUM TECHNOLOGICAL ASPECTS OF THE LOW-ENERGY ELECTROSTATIC CRYOGENIC STORAGE RING  

SciTech Connect

The cryogenic and vacuum concepts for the electrostatic Cryogenic ion Storage Ring (CSR), under construction at the Max-Planck-Institut fuer Kernphysik in Heidelberg, is presented. The ring will operate in a broad temperature range from 2 to 300 K and is required to be bakeable up to 600 K. Extremely high vacuum and low temperatures are necessary to achieve long lifetimes of the molecular ions stored in the ring so that the ions will have enough time to cool by radiation to their vibrational and rotational ground states. To test cryogenic and vacuum technological aspects of the CSR, a prototype is being built and will be connected to the commercial cryogenic refrigerator recently installed, including a specialized 2-K connection system. The first results and the status of current work with the prototype are also presented.

Orlov, D. A.; Lange, M.; Froese, M.; Hahn, R. von; Grieser, M.; Mallinger, V.; Sieber, T.; Weber, T.; Wolf, A. [Max-Planck-Institut fuer Kernphysik, Heidelberg, 69029 Germany (Germany); Rappaport, M. [Weizmann Institute of Science, Rehovot 76100 (Israel)

2008-03-16T23:59:59.000Z

288

Adsorption at Liquid Interfaces Induces Amyloid Fibril Bending and Ring Formation  

E-Print Network (OSTI)

Protein fibril accumulation at interfaces is an important step in many physiological processes and neurodegenerative diseases as well as in designing materials. Here we show, using $\\beta$-lactoglobulin fibrils as a model, that semiflexible fibrils exposed to a surface do not possess the Gaussian distribution of curvatures characteristic for wormlike chains, but instead exhibit a spontaneous curvature, which can even lead to ring-like conformations. The long-lived presence of such rings is confirmed by atomic force microscopy, cryogenic scanning electron microscopy and passive probe particle tracking at air- and oil-water interfaces. We reason that this spontaneous curvature is governed by structural characteristics on the molecular level and is to be expected when a chiral and polar fibril is placed in an inhomogeneous environment such as an interface. By testing $\\beta$-lactoglobulin fibrils with varying average thicknesses, we conclude that fibril thickness plays a determining role in the propensity to form rings.

Sophia Jordens; Emily E. Riley; Ivan Usov; Lucio Isa; Peter D. Olmsted; Raffaele Mezzenga

2014-10-29T23:59:59.000Z

289

Interaction Region Design for a Ring-Ring LHeC  

E-Print Network (OSTI)

tively low energy and moderately high intensity provides high luminosity TeV-scale e-p collisions at one of the LHC interaction points, running simultaneously with existing experiments. Two designs are studied; an electron ring situated in the LHC tunnel, and an electron linac. The focus of this paper is on the ring design. Designing an e-p machine presents interesting accelerator physics and design challenges, particularly when considering the interaction region. These include coupled optics, beam separation and unconventional mini-beta focusing schemes. Designs are constrained by an array of interdependent factors, including beam-beam interaction, detector dimensions and acceptance, luminosity and synchrotron radiation. Methods of addressing these complex issues are discussed. The current designs for the LHeC Ring-Ring interaction region and long straight section are presented and discussed, in the context of the project goals and design challenges encountered. Future developments and work are also discusse...

Thompson, L N S; Bernard, N R; Fitterer, M; Holzer, B; Klein, M; Kostka, P

2011-01-01T23:59:59.000Z

290

RingCentral User Guide | Department of Energy  

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

called RingCentral. RingCentral User Guide Responsible Contacts Bruce Murray HR Policy Advisor E-mail bruce.murray@hq.doe.gov Phone 202-586-3372 More Documents & Publications US...

291

Lateral resistance of ring-shank nail connections in Southern Pine lumber  

E-Print Network (OSTI)

nt v 3 7 7 8 9 11 11 14 17 21 27 27 30 36 36 41 41 43 46 47 55 56 57 REFERENCES . . APPENDIX A NAIL BEND TEST FORTRAN CODE . . . . . B DOWEL BEARING TEST FORTRAN CODE. C CONNECTION YIELD FORTRAN CODE. D NAIL BEND TEST RAW... differences on input parameters to the EYM (ASTM, 1995c, d). Research data on both EYM input parameters as well as connection test results for ring-shank nails are needed to provide a means of critically evaluating the current design procedures for lateral...

Theilen, Ross Dean

2012-06-07T23:59:59.000Z

292

General Compression Looks at Energy Storage from a Different Angle |  

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

General Compression Looks at Energy Storage from a Different Angle General Compression Looks at Energy Storage from a Different Angle General Compression Looks at Energy Storage from a Different Angle February 3, 2011 - 3:36pm Addthis Image of the General Compression CAES system | courtesy of General Compression, Inc. Image of the General Compression CAES system | courtesy of General Compression, Inc. April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs Earlier this week, we told you about a new company that's developing battery technology that will allow energy storage for multiple hours on the power grid. General Compression is another innovative company that's developing a different way to store electricity by using compressed air energy storage, or CAES. The technology uses cheap power to pump air into

293

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Dealer Permit  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Dealer Permit to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Dealer Permit on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Dealer Permit on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Dealer Permit on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Dealer Permit on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Dealer Permit on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Dealer Permit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Compressed Natural Gas (CNG) Dealer Permit

294

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Tax  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Tax to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Tax on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Tax on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Tax on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Tax on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Tax on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Tax on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Compressed Natural Gas (CNG) Tax CNG is taxed at a rate of $0.10 per gallon when used as a motor fuel. CNG

295

Alternative Fuels Data Center: State Compressed Natural Gas (CNG) Study  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Compressed Natural Gas (CNG) Study to someone by E-mail Share Alternative Fuels Data Center: State Compressed Natural Gas (CNG) Study on Facebook Tweet about Alternative Fuels Data Center: State Compressed Natural Gas (CNG) Study on Twitter Bookmark Alternative Fuels Data Center: State Compressed Natural Gas (CNG) Study on Google Bookmark Alternative Fuels Data Center: State Compressed Natural Gas (CNG) Study on Delicious Rank Alternative Fuels Data Center: State Compressed Natural Gas (CNG) Study on Digg Find More places to share Alternative Fuels Data Center: State Compressed Natural Gas (CNG) Study on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type State Compressed Natural Gas (CNG) Study At the direction of the Alaska Legislature, the Department of

296

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Project Loans  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Project Loans to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Project Loans on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Project Loans on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Project Loans on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Project Loans on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Project Loans on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Project Loans on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Compressed Natural Gas (CNG) Project Loans

297

General Compression Looks at Energy Storage from a Different Angle |  

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

General Compression Looks at Energy Storage from a Different Angle General Compression Looks at Energy Storage from a Different Angle General Compression Looks at Energy Storage from a Different Angle February 3, 2011 - 3:36pm Addthis Image of the General Compression CAES system | courtesy of General Compression, Inc. Image of the General Compression CAES system | courtesy of General Compression, Inc. April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs Earlier this week, we told you about a new company that's developing battery technology that will allow energy storage for multiple hours on the power grid. General Compression is another innovative company that's developing a different way to store electricity by using compressed air energy storage, or CAES. The technology uses cheap power to pump air into

298

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Permit  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Permit to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Permit on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Permit on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Permit on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Permit on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Permit on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Permit on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type Compressed Natural Gas (CNG) Permit Anyone dispensing CNG for use in vehicles must obtain a permit from the

299

compressed natural gas | OpenEI  

Open Energy Info (EERE)

compressed natural gas compressed natural gas Dataset Summary Description Alternative fueling stations are located throughout the United States and their availability continues to grow. The Alternative Fuels Data Center (AFDC) maintains a website where you can find alternative fuels stations near you or on a route, obtain counts of alternative fuels stations by state, Source Alternative Fuels Data Center Date Released December 13th, 2010 (3 years ago) Date Updated December 13th, 2010 (3 years ago) Keywords alt fuel alternative fuels alternative fuels stations biodiesel CNG compressed natural gas E85 Electricity ethanol hydrogen liquefied natural gas LNG liquefied petroleum gas LPG propane station locations Data text/csv icon alt_fuel_stations_apr_4_2012.csv (csv, 2.3 MiB) Quality Metrics

300

Gas insulated transmission line having tapered particle trapping ring  

DOE Patents (OSTI)

A gas-insulated transmission line includes an outer sheath, an inner conductor, insulating supports and an insulating gas. A particle-trapping ring is secured to each insulating support, and it is comprised of a central portion and two tapered end portions. The ends of the particle trapping ring have a smaller diameter than the central portion of the ring, so as to enable the use of the particle trapping ring in a curved transmission line.

Cookson, Alan H. (Pittsburgh, PA)

1982-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Lattice Boltzmann model for compressible fluids  

Science Journals Connector (OSTI)

We formulate a lattice Boltzmann model which simulates compressible fluids. By choosing the parameters of the equilibrium distribution appropriately, we are able to select the sound speed (which may be set arbitrarily low), bulk viscosity, and kinematic viscosity. This model simulates compressible flows and can include shocks. With a proper rescaling and zero-sound speed, this model simulates Burgers’s equation. The viscosity determined by a Chapman-Enskog expansion compares well with that measured from simulations. We also compare the exact solutions of Burgers’s equation on the unit circle to solutions of our lattice Boltzmann model, again finding reasonable agreement.

F. J. Alexander; H. Chen; S. Chen; G. D. Doolen

1992-08-15T23:59:59.000Z

302

Techniques for optically compressing light intensity ranges  

DOE Patents (OSTI)

A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten uranium in an atomic vapor laser isotope separator (AVLIS) system is disclosed herein. The assembly includes means for optically compressing the light intensity range appearing at its input sufficient to make it receivable and decipherable by a standard video camera. A number of different means for compressing the intensity range are disclosed. These include the use of photogray glass, the use of a pair of interference filters, and the utilization of a new liquid crystal notch filter in combination with an interference filter.

Rushford, Michael C. (Livermore, CA)

1989-01-01T23:59:59.000Z

303

Groningen 2nd phase compression project  

Science Journals Connector (OSTI)

ABSTRACT A Double End Driven Compression train with Active Magnetic Bearings (AMBs), a novel concept on its own, has been chosen as the solution for the Groningen 2nd phase compression project. A development assurance program was followed by a team comprising of both Siemens and Shell specialists with the intent of ensuring that technical risks were identified and addressed as far as possible prior to field implementation. The paper will describe• The concept evaluation and selection • The creation of the development programme to assess technical risks • Technical challenges and learnings • Current status of the development and design maturity

E. Liow; H. Goorhuis

2014-01-01T23:59:59.000Z

304

Fast electron microscopy via compressive sensing  

DOE Patents (OSTI)

Various technologies described herein pertain to compressive sensing electron microscopy. A compressive sensing electron microscope includes a multi-beam generator and a detector. The multi-beam generator emits a sequence of electron patterns over time. Each of the electron patterns can include a plurality of electron beams, where the plurality of electron beams is configured to impart a spatially varying electron density on a sample. Further, the spatially varying electron density varies between each of the electron patterns in the sequence. Moreover, the detector collects signals respectively corresponding to interactions between the sample and each of the electron patterns in the sequence.

Larson, Kurt W; Anderson, Hyrum S; Wheeler, Jason W

2014-12-09T23:59:59.000Z

305

Techniques for optically compressing light intensity ranges  

DOE Patents (OSTI)

A pin hole camera assembly for use in viewing an object having a relatively large light intensity range, for example a crucible containing molten uranium in an atomic vapor laser isotope separator (AVLIS) system is disclosed herein. The assembly includes means for optically compressing the light intensity range appearing at its input sufficient to make it receivable and decipherable by a standard video camera. A number of different means for compressing the intensity range are disclosed. These include the use of photogray glass, the use of a pair of interference filters, and the utilization of a new liquid crystal notch filter in combination with an interference filter. 18 figs.

Rushford, M.C.

1989-03-28T23:59:59.000Z

306

Electrical conductivity of shock compressed xenon  

Science Journals Connector (OSTI)

The results on measurements of electrical conductivity of shock compressed gaseous and liquid xenon are discussed. Thermodynamical parameters of xenon are calculated in frames of plasma chemical model. To estimate electrical conductivity modified Ziman theory is used. A reasonable agreement between experimental and theoretical data on equation of state and transport properties is shown in a wide range of parameters from gas to liquid densities pressures 10–140 GPa and temperatures >5000 K. New experimental data on measurements of equation of state and conductivity of xenon under multiple shock compression are presented.

Victor B. Mintsev; Vladimir Ya. Ternovoi; Victor K. Gryaznov; Alexei A. Pyalling; Vladimir E. Fortov; Igor L. Iosilevskii

2000-01-01T23:59:59.000Z

307

Plasma-based Accelerator with Magnetic Compression  

SciTech Connect

Electron dephasing is a major gain-inhibiting effect in plasma-based accelerators. A novel method is proposed to overcome dephasing, in which the modulation of a modest (#24; O(10 kG)), axial, uniform magnetic field in the acceleration channel leads to densification of the plasma through magnetic compression, enabling direct, time-resolved control of the plasma wave properties. The methodology is broadly applicable and can be optimized to improve the leading acceleration approaches, including plasma beat-wave, plasma wakefield, and laser wakefield acceleration. The advantages of magnetic compression compared to other proposed schemes to overcome dephasing are identified.

Paul F. Schmit and Nathaniel J. Fisch

2012-06-28T23:59:59.000Z

308

Transient injection-locking of an unstable ring dye laser  

SciTech Connect

The transient injection-locking properties of an unstable ring resonator dye laser have been investigated. When a narrow line optical pulse was injected into the ring resonator, the energy emitted from the ring increased and the lasing spectrum narrowed to that of the injected pulse. However, the polarization control of the emitted radiation was incomplete.

Harris, D.G.; Waite, T.R.; Holmes, D.A. (Rockwell International, Rocketdyne Division, Canoga Park, California 91303 (USA))

1990-04-20T23:59:59.000Z

309

Study of CMOS APS Responsivity Enhancement: Ring-Shaped Photodiode  

E-Print Network (OSTI)

Study of CMOS APS Responsivity Enhancement: Ring-Shaped Photodiode Tatiana Danov, Igor Shcherback obtained from various ring-shaped pixel photodiodes with different inner radius, implemented in a standard illumination. We show that the photodiodes with a small ring-opening exhibit better sensitivity in the blue

310

E-Print Network 3.0 - accelerator beam test Sample Search Results  

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

test Search Powered by Explorit Topic List Advanced Search Sample search results for: accelerator beam test Page: << < 1 2 3 4 5 > >> 1 RFQ 19 Ring Test The final RFQ electrodes...

311

M57 Ring Nebulae M57 -The famously named "Ring Nebula" is located in the northern constellation of Lyra, and  

E-Print Network (OSTI)

M57 ­ Ring Nebulae M57 - The famously named "Ring Nebula" is located in the northern constellation by ultraviolet energy from the central star. _ _ _ _ _ _ Credits: Wikpedia; NASA/SCSTi/AURA #12;

312

A coupled model for ring dynamics, gas flow, and oil flow through the ring grooves in IC engines  

E-Print Network (OSTI)

Oil flows through ring/groove interface play a critical role in oil transport among different regions the piston ring pack of internal combustion engines. This thesis work is intended to improve the understanding and ...

Jia, Ke, S. M. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

313

Mass and Lifetime Measurements in Storage Rings  

SciTech Connect

Masses of nuclides covering a large area of the chart of nuclides can be measured in storage rings where many ions circulate at the same time. In this paper the recent progress in the analysis of Schottky mass spectrometry data is presented as well as the technical improvements leading to higher accuracy for isochronous mass measurements with a time-of-flight detector. The high sensitivity of the Schottky method down to single ions allows to measure lifetimes of nuclides by observing mother and daughter nucleus simultaneously. In this way we investigated the decay of bare and H-like 140Pr. As we could show the lifetime can be even shortened compared to those of atomic nuclei despite of a lower number of electrons available for internal conversion or electron capture.All these techniques will be implemented with further improvements at the storage rings of the new FAIR facility at GSI in the future.

Weick, H.; Beckert, K.; Beller, P.; Bosch, F.; Dimopoulou, C.; Kozhuharov, C.; Kurcewicz, J.; Mazzocco, M.; Nociforo, C.; Nolden, F.; Steck, M.; Sun, B.; Winkler, M. [Gesellschaft fuer Schwerionenforschung mbH, 64291 Darmstadt (Germany); Brandau, C.; Chen, L.; Geissel, H.; Knoebel, R.; Litvinov, S. A.; Litvinov, Yu. A.; Scheidenberger, C. [Gesellschaft fuer Schwerionenforschung mbH, 64291 Darmstadt (Germany); II. Phys. Institut, Justus-Liebig-Universitaet Giessen, 35392 Giessen (Germany)] (and others)

2007-05-22T23:59:59.000Z

314

Sediment resuspension and erosion by vortex rings  

Science Journals Connector (OSTI)

Particle resuspension and erosion induced by a vortex ringinteracting with a sediment layer was investigated experimentally using flow visualization (particle image velocimetry) high-speed video and a recently developed light attenuation method for measuring displacements in bed level. Near-spherical sediment particles were used throughout with relative densities of 1.2–7 and diameters ( d ) ranging between 90 and 1600 ? ? m . Attention was focused on initially smooth horizontal bedforms with the vortex ring aligned to approach the bed vertically. Interaction characteristics were investigated in terms of the dimensionless Shields parameter defined using the vortex-ring propagation speed. The critical conditions for resuspension (whereby particles are only just resuspended) were determined as a function of particle Reynolds number (based on the particle settling velocity and d ). The effects of viscous damping were found to be significant for d / ? resuspension volumes are analyzed as a function interaction time impact condition and sediment size.

R. J. Munro; N. Bethke; S. B. Dalziel

2009-01-01T23:59:59.000Z

315

Monopole-Antimonopole Chains and Vortex Rings  

E-Print Network (OSTI)

We consider static axially symmetric solutions of SU(2) Yang-Mills-Higgs theory. The simplest such solutions represent monopoles, multimonopoles and monopole-antimonopole pairs. In general such solutions are characterized by two integers, the winding number m of their polar angle, and the winding number n of their azimuthal angle. For solutions with n=1 and n=2, the Higgs field vanishes at m isolated points along the symmetry axis, which are associated with the locations of m monopoles and antimonopoles of charge n. These solutions represent chains of m monopoles and antimonopoles in static equilibrium. For larger values of n, totally different configurations arise, where the Higgs field vanishes on one or more rings, centered around the symmetry axis. We discuss the properties of such monopole-antimonopole chains and vortex rings, in particular their energies and magnetic dipole moments, and we study the influence of a finite Higgs self-coupling constant on these solutions.

Burkhard Kleihaus; Jutta Kunz; Yasha Shnir

2004-05-19T23:59:59.000Z

316

A ring imaging Cherenkov detector for CLAS12  

SciTech Connect

The energy increase of Jefferson Lab's Continuous Electron Beam Accelerator Facility (CEBAF) to 12 GeV promises to greatly extend the physics reach of its experiments. This will include an upgrade of the CEBAF Large Acceptance Spectrometer (CLAS) to CLAS12, offering unique possibilities to study internal nucleon dynamics. For this excellent hadron identification over the full kinematical range of 3–8 GeV/c is essential. This will be achieved by the installation of a Ring Imaging CHerenkov (RICH) detector. A novel hybrid imaging design incorporating mirrors, aerogel radiators and Hamamatsu H8500 multianode photomultiplier tubes is proposed. Depending on the incident particle track angle, Cherenkov light will either be imaged directly or after two reflections and passes through the aerogel. The detector design is described, along with preliminary results on individual detector components tests and from recent testbeam studies.

Montgomery, Rachel A. [Glasgow University

2013-12-01T23:59:59.000Z

317

A Decision-Based Analysis of Compressed Air Usage Patterns in Automotive Manufacturing  

E-Print Network (OSTI)

Analysis of Compressed Air Usage Patterns in Automotivefor future compressed air usage. The Cost-of-Ownership andfuture compressed air usage. Environmental Value systems (

Yuan, Chris; Zhang, Teresa; Rangarajan, Arvind; Dornfeld, David; Ziemba, Bill; Whitbeck, Rod

2006-01-01T23:59:59.000Z

318

E-Print Network 3.0 - adiabatic compressed air Sample Search...  

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

& Compression Summary: Hydrogen Delivery Liquefaction & Compression Raymond Drnevich Praxair - Tonawanda, NY Strategic... Liquefaction Hydrogen Compression 12;3 Praxair at a...

319

Improving Energy Efficiency of Compressed Air System Based on System Audit  

E-Print Network (OSTI)

50 compressed air system energy audits completed by Shanghai50 compressed air system energy audits completed by Shanghaiof compressed air energy audits conducted by the Shanghai

Shanghai, Hongbo Qin; McKane, Aimee

2008-01-01T23:59:59.000Z

320

Experimental study of the effect of top-ring clearance volume on unburned hydrocarbon concentrations  

Science Journals Connector (OSTI)

The clearance volume between the piston, the cylinder and the top compression ring in an internal combustion engine has a significant effect on the unburned hydrocarbon concentration. The high heat transfer from the burning mixture to the cylinder surface extinguishes the flame front, and this is the main reason for increased unburned hydrocarbon concentrations. The heat transfer between the mixture and the clearance volume surface is affected by the ratio of coolant surface to the clearance volume. In this study the effect of the ratio of the coolant surface to the clearance volume on the unburned hydrocarbon concentration was investigated using three different purpose-built pistons. A decrease of this ratio reduced the unburned hydrocarbon concentration by 40%.

Muammer Ozkan; Orhan Deniz; Tarkan Sandalci

2002-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Performance evaluation of bound diamond ring tools  

SciTech Connect

LLNL is collaborating with the Center for Optics Manufacturing (COM) and the American Precision Optics Manufacturers Association (APOMA) to optimize bound diamond ring tools for the spherical generation of high quality optical surfaces. An important element of this work is establishing an experimentally-verified link between tooling properties and workpiece quality indicators such as roughness, subsurface damage and removal rate. In this paper, we report on a standardized methodology for assessing ring tool performance and its preliminary application to a set of commercially-available wheels. Our goals are to (1) assist optics manufacturers (users of the ring tools) in evaluating tools and in assessing their applicability for a given operation, and (2) provide performance feedback to wheel manufacturers to help optimize tooling for the optics industry. Our paper includes measurements of wheel performance for three 2-4 micron diamond bronze-bond wheels that were supplied by different manufacturers to nominally- identical specifications. Preliminary data suggests that the difference in performance levels among the wheels were small.

Piscotty, M.A.; Taylor, J.S.; Blaedel, K.L.

1995-07-14T23:59:59.000Z

322

NuSTORM {\\mu} Ring -- Design and Injection Optimization  

E-Print Network (OSTI)

The design of the NuSTORM muon production beam line and storage ring is discussed. The facility includes a pion production target station with a pion collection horn and transport into a straight section of a storage ring. {\\pi} decay within that straight section provides {\\mu}'s that are stored within the ring for subsequent decay providing precision electron and muon neutrino beams. The ring and transport designs are described and optimized. Genetic Algorithm optimization of the horn and transport into the ring has been performed, providing a significant increase in intensity

Neuffer, David; Bross, A

2015-01-01T23:59:59.000Z

323

Semantic Multimodal Compression for Wearable Sensing Systems  

E-Print Network (OSTI)

sensors in the shoe follow natural human motion, in airborne, landing, and take-off phases. The key. Such systems can be expensive and power hungry due to their multi- sensor implementations that require constant use, yet by nature they demand low-cost and low-power implementations. Semantic multimodal compression

Potkonjak, Miodrag

324

Thickness and drainage of perfluoropolyethers under compression  

SciTech Connect

The Surface Forces Apparatus was used to study the compression and drainage of perfluoropolyethers (PFPE) between two flat parallel mica surfaces. In the case of Zdols and Demnum-SA, the PFPE can be squeezed out during slow compression to a final residual film one gyration diameter in thickness. This thickness remained constant up to the highest applied pressure of (is similar to)10 MPa. The residual thickness for Demnum-SA, with one active end group, was found to be approximately 40% larger than that for Zdol of the same molecular weight, with two active end groups. In contrast, Z03, with no active end groups, could be displaced completely from the contact. The dynamics of expulsion were studied by monitoring the variation of the gap width as a function of time after fast (a few milliseconds) step increase in the compressive load. It was found that Zdol behaves as the bulk liquid down to gap widths of 4 equivalent gyration diameters. A viscosity increase of more than 10 times was observed when the gap width was between 4 and 2 gyration diameters. Finally, slow compression to the maximum achievable pressure (approximately 10 MPa) led to a residual layer one gyration diameter in thickness trapped between the mica surfaces.

Xu, Lei; Ogletree, D Frank; Salmeron, Miquel; Tang, Huan; Gui, Jing

2001-01-01T23:59:59.000Z

325

Faster Compressed Dictionary Matching (extended abstract)  

E-Print Network (OSTI)

The past few years have witnessed several exciting results on compressed represen- tation of a string T that supports e±cient pattern matching, and the space complexity has been reduced to jTjHk(T)+o(jTj log ¾) bits [8, ...

Hon, Wing-Kai; Lam, Tak-Wah; Shah, Rahul; Tam, Siu-Lung; Vitter, Jeffrey Scott

2010-01-01T23:59:59.000Z

326

Compressed Index for Dictionary Matching (extended abstract)  

E-Print Network (OSTI)

The past few years have witnessed several exciting results on compressed represen- tation of a string T that supports e±cient pattern matching, and the space complexity has been reduced to jTjHk(T)+o(jTj log ¾) bits [8, ...

Hon, Wing-Kai; Lam, Tak-Wah; Shah, Rahul; Tam, Siu-Lung; Vitter, Jeffrey Scott

2008-01-01T23:59:59.000Z

327

Compressive Computation in Analog VLSI Motion Sensors  

E-Print Network (OSTI)

Compressive Computation in Analog VLSI Motion Sensors Rainer A. Deutschmann1 and Oliver G. Wenisch2 analog VLSI mo- tion sensors developed in the past. We show how their pixel-parallel architecture can is best suited to perform the algorithm even at high noise levels. 1 Analog VLSI Motion Sensors Inthe past

Deutschmann, Rainer

328

From sideward flow to nuclear compressibility  

SciTech Connect

We show that the differences between the Plastic Ball and DIOGENE experiments on sideward flow make it possible to asses independently, within the transport description of collisions, the effect of density dependence and momentum dependence of the nucleon optical potential. We estimate that the nuclear compressibility [ital K] lies between 180 and 235 MeV.

Pan, Q.; Danielewicz, P. (National Superconducting Cyclotron Laboratory and Department of Physics Astronomy, Michigan State University, East Lansing, Michigan 48824 (United States))

1993-04-05T23:59:59.000Z

329

From sideward flow to nuclear compressibility  

SciTech Connect

The authors use the transport model (BUU) with different optical potentials, combining density and momentum dependence with strong or weak nuclear compressibility, to simulate heavy-ion collisions. Experiment by DIOGENE allows them to show that experimental sideward flow is close to their calculations using optical potential of soft momentum- and density-dependence (Potential I), as well as calculations using optical potential of stiff pure density-dependence (Potential II). On the other hand, the Plastic Ball experiment on sideward flow, mainly due to the instrumental rejection of low transverse momentum particles, allows the authors to tell the differences between Potential I and II, with calculations using Potential I being close to the experimental data. Combining the results above, they see that only potential I with soft nuclear compressibility can describe the experimental data. The uncertainty of NN cross section in the medium leads to the uncertainty in nuclear compressibility, they estimate that the nuclear compressibility K lies between 180 and 235 MeV.

Pan, Q.; Danielewicz, P.

1993-04-01T23:59:59.000Z

330

Elevated temperature testing of gaskets for bolted flanged connections  

SciTech Connect

Bolted flanged connections are especially prone to leakage when operating at elevated temperatures. In 1986--87, the API Subcommittee on Pressure Vessels, Piping and Tanks expressed a need for gasket performance data and technical formulations to permit the design of gasket systems for high temperature service. The objective was to gain initial understanding of flange behavior, gasket deformation and leakage behavior under simulated elevated temperature service conditions. Experience gained through the previous PVRC-funded elevated temperature test programs as well as companion non-PVRC-funded programs has raised a number of basic questions which would be best answered in the context of a PVRC-supported effort. This Report summarizes the results obtained for four different topics covered in PVRC Grant No. 90-1, namely: (A) verify experimentally the extrapolated long term elevated temperature good performance of compressed asbestos reinforced sheet materials on which are based the MTI guidelines; (B) study the effect of creep/relaxation of flexible graphite sheet materials at elevated temperature on the tightness of a joint in which the gasket deflection remains practically constant; (C) study the effect of the gas medium and pressure on the tightness performance at elevated temperature of graphite filled spiral wound gaskets with and without internal rings; (D) establish correlations between the weight loss of elastomer sheet gasket materials during aging at elevated temperature, and changes in their mechanical properties (tensile strength and relaxation) as well as the variations of their tightness performance.

Derenne, M.; Marchand, L.; Bazergui, A. (Univ. of Montreal, Quebec (Canada). Ecole Polytechnique); Payne, J.R. (J. Payne Associates, Long Valley, NJ (United States))

1994-05-01T23:59:59.000Z

331

Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels  

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

Compressed Natural Gas Compressed Natural Gas and Hydrogen Fuels Workshop to someone by E-mail Share Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Facebook Tweet about Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Twitter Bookmark Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Google Bookmark Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Delicious Rank Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on Digg Find More places to share Fuel Cell Technologies Office: Compressed Natural Gas and Hydrogen Fuels Workshop on AddThis.com... Publications Program Publications Technical Publications Educational Publications

332

Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) Vehicle Conversion Loans - Allegiance Credit Union to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Conversion Loans - Allegiance Credit Union on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Conversion Loans - Allegiance Credit Union on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Conversion Loans - Allegiance Credit Union on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Conversion Loans - Allegiance Credit Union on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) Vehicle Conversion Loans - Allegiance Credit Union on Digg Find More places to share Alternative Fuels Data Center: Compressed

333

Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) and Propane Deregulation to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Deregulation on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Deregulation on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Deregulation on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Deregulation on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Deregulation on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Deregulation on AddThis.com... More in this section... Federal State Advanced Search

334

Alternative Fuels Data Center: Compressed Natural Gas School Buses Grant  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas School Buses Grant and Loan Pilot Program to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas School Buses Grant and Loan Pilot Program on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas School Buses Grant and Loan Pilot Program on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas School Buses Grant and Loan Pilot Program on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas School Buses Grant and Loan Pilot Program on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas School Buses Grant and Loan Pilot Program on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas School Buses Grant and Loan Pilot Program on AddThis.com...

335

Sensitivity Enhancement System for Pulse Compression Weather Radar  

Science Journals Connector (OSTI)

The use of low-power solid state transmitters in weather radar to keep costs down requires pulse compression technique in order to maintain an adequate minimum detectable signal. However, wide-band pulse compression filters will partly reduce the ...

Cuong M. Nguyen; V. Chandrasekar

336

2014 - LNG Export, Compressed Natural Gas (CNG), Re-Exports ...  

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

4 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas Applications 2014 - LNG Export, Compressed Natural Gas (CNG), Re-Exports & Long Term Natural Gas...

337

Centralized Collaborative Compressed Sensing of Wideband Spectrum for Cognitive Radios  

E-Print Network (OSTI)

1 Centralized Collaborative Compressed Sensing of Wideband Spectrum for Cognitive Radios Hessam, spectrum sensing, cognitive radio, distri- bution discontinuities, algebraic detection, wideband. I technique for cognitive radio systems which combines algebraic tools and compressive sampling techniques

Paris-Sud XI, Université de

338

Wave motions in unbounded poroelastic solids infused with compressible fluids  

E-Print Network (OSTI)

Wave motions in unbounded poroelastic solids infused with compressible fluids S. Quiligotti, G at proposing a two-scale constitutive theory of a poroelastic solid infused with an inviscid compressible fluid

339

CO? compression for capture-enabled power systems  

E-Print Network (OSTI)

The objective of this thesis is to evaluate a new carbon dioxide compression technology - shock compression - applied specifically to capture-enabled power plants. Global warming has increased public interest in carbon ...

Suri, Rajat

2009-01-01T23:59:59.000Z

340

COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our...  

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

April 30, 2014, 4:00pm to 5:30pm Colloquia MBG Auditorium COLLOQUIUM: Compressed Air Energy Storage: The Bridge to Our Renewable Energy Future Mr. Al Cavallo Consultant Compressed...

Note: This page contains sample records for the topic "ring compression testing" 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

Alternative Fuels Data Center: Propane and Compressed Natural Gas (CNG)  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Propane and Compressed Propane and Compressed Natural Gas (CNG) Device Fee to someone by E-mail Share Alternative Fuels Data Center: Propane and Compressed Natural Gas (CNG) Device Fee on Facebook Tweet about Alternative Fuels Data Center: Propane and Compressed Natural Gas (CNG) Device Fee on Twitter Bookmark Alternative Fuels Data Center: Propane and Compressed Natural Gas (CNG) Device Fee on Google Bookmark Alternative Fuels Data Center: Propane and Compressed Natural Gas (CNG) Device Fee on Delicious Rank Alternative Fuels Data Center: Propane and Compressed Natural Gas (CNG) Device Fee on Digg Find More places to share Alternative Fuels Data Center: Propane and Compressed Natural Gas (CNG) Device Fee on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type

342

Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) and Propane Regulatory Authority to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Regulatory Authority on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Regulatory Authority on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Regulatory Authority on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Regulatory Authority on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Regulatory Authority on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Regulatory Authority on AddThis.com...

343

Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Electricity  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Compressed Natural Gas Compressed Natural Gas (CNG) and Electricity Tax Exemption for Transit Use to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Electricity Tax Exemption for Transit Use on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Electricity Tax Exemption for Transit Use on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Electricity Tax Exemption for Transit Use on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Electricity Tax Exemption for Transit Use on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Electricity Tax Exemption for Transit Use on Digg Find More places to share Alternative Fuels Data Center: Compressed

344

LSB Based Audio Steganography Based On Text Compression  

Science Journals Connector (OSTI)

Compression algorithm is what reduces the redundancy of data representation and decreases the data storage capacity. Data compression plays a vital role in reducing the communication cost making use of available bandwidth. The compressed data from the security aspect is transmitted through internet. It is, however very much vulnerable to a multitude of attacks. To propose a new dictionary based text compression technique for ASCII texts for the purpose of obtaining good performance on various document sizes. Dictionary based compression bits are hidden into the Lsb bit of audio signals and to calculate the signal to noise ratio (SNR). This audio Steganography is conducted for various compression algorithms with dictionary based compression. Audio Steganography based dictionary compression achieves better value of signal to noise ratio (SNR).

M. Baritha Begum; Y. Venkataramani

2012-01-01T23:59:59.000Z

345

Frostbite Theater - Liquid Nitrogen Experiments - The Flying Ring!  

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

Liquid Nitrogen and the Tea Kettle Mystery! Liquid Nitrogen and the Tea Kettle Mystery! Previous Video (Liquid Nitrogen and the Tea Kettle Mystery!) Frostbite Theater Main Index Next Video (Pewter Bells) Pewter Bells The Flying Ring! A copper ring leaps off an electromagnet when it's turned on. What happens when the ring's resistance is lowered using liquid nitrogen? [ Show Transcript ] Announcer: Frostbite Theater presents... Cold Cuts! No baloney! Joanna and Steve: Just science! Joanna: Hi! I'm Joanna! Steve: And I'm Steve! Joanna: And this is an AC powered electromagnet. And this is a copper ring. When I place the copper ring on the electromagnet and turn it on, the magnet's changing magnetic field will induce an electric current in the copper ring. The current in the ring will then create it's own magnetic

346

Low-dimensional Models for Compression, Compressed Sensing, and Prediction of Large-Scale  

E-Print Network (OSTI)

Technological University, Singapore, 639798; nikola001@e.ntu.edu.sg, muhammad89@e.ntu.edu.sg, jdauwels@ntu) is commonly deployed to compress large traffic data sets [2], [4]­[6]. PCA provides an effective low

Jaillet, Patrick

347

A New Compressive Imaging Camera Architecture using Optical-Domain Compression  

E-Print Network (OSTI)

for processing, to a "computa- tional signal processing" (CSP) paradigm, where analog signals are converted nonlinear techniques. 1.1. Compressive sensing CSP builds upon a core tenet of signal processing

348

AIRMaster: Compressed air system audit software  

SciTech Connect

The project goal was to develop a software tool, AIRMaster, and a methodology for performing compressed air system audits. AIRMaster and supporting manuals are designed for general auditors or plant personnel to evaluate compressed air system operation with simple instrumentation during a short-term audit. AIRMaster provides a systematic approach to compressed air system audits, analyzing collected data, and reporting results. AIRMaster focuses on inexpensive Operation and Maintenance (O and M) measures, such as fixing air leaks and improving controls that can significantly improve performance and reliability of the compressed air system, without significant risk to production. An experienced auditor can perform an audit, analyze collected data, and produce results in 2--3 days. AIRMaster reduces the cost of an audit, thus freeing funds to implement recommendations. The AIRMaster package includes an Audit Manual, Software and User's manual, Analysis Methodology Manual, and a Case Studies summary report. It also includes a Self-Guided Tour booklet to help users quickly screen a plant for efficiency improvement potentials, and an Industrial Compressed Air Systems Energy Efficiency Guidebook. AIRMaster proved to be a fast and effective audit tool. In sever audits AIRMaster identified energy savings of 4,056,000 kWh, or 49.2% of annual compressor energy use, for a cost savings of $152,000. Total implementation costs were $94,700 for a project payback period of 0.6 years. Available airflow increased between 11% and 51% of plant compressor capacity, leading to potential capital benefits from 40% to 230% of first year energy savings.

Wheeler, G.M.; Bessey, E.G.; McGill, R.D.; Vischer, K.

1997-07-01T23:59:59.000Z

349

Determining the Right Air Quality for Your Compressed Air System  

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

This tip sheet outlines the main factors for determining the right air quality for compressed air systems.

350

Multiple Compressions in the Middle Energy Plasma Focus Device  

Science Journals Connector (OSTI)

This paper reports some of the results that are aimed to investigate the neutron emission from the middle energy Mather?type plasma focus. These results indicated that with increase the pressure compression time is increase but there is not any direct relation between the compression time and neutron yield. Also it seems that multiple compression regimes is occurred in low pressure and single compression is appeared at higher pressure where is the favorable to neutron production.

H. R. Yousefi; Y. Ejiri; H. Ito; K. Masugata

2006-01-01T23:59:59.000Z

351

Method for testing the strength and structural integrity of nuclear fuel particles  

DOE Patents (OSTI)

An accurate method for testing the strength of nuclear fuel particles. Each particle includes an upper and lower portion, and is placed within a testing apparatus having upper and lower compression members. The upper compression member includes a depression therein which is circular and sized to receive only part of the upper portion of the particle. The lower compression member also includes a similar depression. The compression members are parallel to each other with the depressions therein being axially aligned. The fuel particle is then placed between the compression members and engaged within the depressions. The particle is then compressed between the compression members until it fractures. The amount of force needed to fracture the particle is thereafter recorded. This technique allows a broader distribution of forces and provides more accurate results compared with systems which distribute forces at singular points on the particle.

Lessing, Paul A. (Idaho Falls, ID)

1995-01-01T23:59:59.000Z

352

Method for testing the strength and structural integrity of nuclear fuel particles  

DOE Patents (OSTI)

An accurate method for testing the strength of nuclear fuel particles is disclosed. Each particle includes an upper and lower portion, and is placed within a testing apparatus having upper and lower compression members. The upper compression member includes a depression therein which is circular and sized to receive only part of the upper portion of the particle. The lower compression member also includes a similar depression. The compression members are parallel to each other with the depressions therein being axially aligned. The fuel particle is then placed between the compression members and engaged within the depressions. The particle is then compressed between the compression members until it fractures. The amount of force needed to fracture the particle is thereafter recorded. This technique allows a broader distribution of forces and provides more accurate results compared with systems which distribute forces at singular points on the particle. 13 figs.

Lessing, P.A.

1995-10-17T23:59:59.000Z

353

Machine studies at the Los Alamos Proton Storage Ring  

SciTech Connect

Results from recent machine development studies at the Los Alamos Proton Storage Ring (PSR) are presented on the origin of the ``first-turn`` losses, the PSR instability, and volume H{sup {minus}} ion source development. An experiment has been performed to measure the production of excited states of H{sup 0} when 800-MeV H{sup {minus}} ions impinge upon thin (70--300 {mu}g/cm{sup 2}) carbon foils. Preliminary results indicate yields of about 0.5% each for the n = 3 and n = 4 states. Much evidence has been accumulated supporting the hypothesis that the PSR instability is caused by coupled e-p oscillations, but a truly definitive and unambiguous test has not yet been performed. Plans for such a test include installation of hardware to suppress the most copious sources of electrons and experiments to measure the quantity of proton beam in the interbunch gap. Good progress is being made to test and evaluate two promising designs for a new high-intensity, high-brightness volume H{sup {minus}} ion source and on fast chopping of the beam by pulsing the plasma electrode.

Macek, R.J.

1993-09-01T23:59:59.000Z

354

Generalizing the Boussinesq Approximation to Stratified Compressible Flow  

E-Print Network (OSTI)

Generalizing the Boussinesq Approximation to Stratified Compressible Flow Dale R. Durran a Akio The simplifications required to apply the Boussinesq approximation to compressible flow are compared with those compressible fluid with the Boussinesq continuity equation has led to the development of several different sets

355

Compressed Air Energy Savings: SAV-AIR Monitor and Control System and the PNW Compressed Air Challenge  

E-Print Network (OSTI)

This paper presents the results from two compressed air programs supported by the Northwest Energy Efficiency Alliance (Alliance) over the last five years. In 1997 the Alliance funded the Northwest regional version of the Compressed Air Challenge...

Anderson, K. J.; Annen, B.; Scott, S.

356

Modern Compressed Air Piping Selection and Design Can Have a Great Impact on Your Compressed Air Energy Dollars  

E-Print Network (OSTI)

This paper introduces new concepts in compressed air piping, sizing, and system design beyond the conventional pipe sizing charts and standard system layout guide lines. The author shows how compressed air velocity has a very significant impact...

Van Ormer, H.

2005-01-01T23:59:59.000Z

357

E-Print Network 3.0 - advanced reciprocating compression Sample...  

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

Machines... Hydrogen Delivery Liquefaction & Compression Raymond Drnevich Praxair - Tonawanda, NY Strategic... Liquefaction Hydrogen Compression 12;3 Praxair at a...

358

Self-seeding ring optical parametric oscillator  

DOE Patents (OSTI)

An optical parametric oscillator apparatus utilizing self-seeding with an external nanosecond-duration pump source to generate a seed pulse resulting in increased conversion efficiency. An optical parametric oscillator with a ring configuration are combined with a pump that injection seeds the optical parametric oscillator with a nanosecond duration, mJ pulse in the reverse direction as the main pulse. A retroreflecting means outside the cavity injects the seed pulse back into the cavity in the direction of the main pulse to seed the main pulse, resulting in higher conversion efficiency.

Smith, Arlee V. (Albuquerque, NM); Armstrong, Darrell J. (Albuquerque, NM)

2005-12-27T23:59:59.000Z

359

Water mass distribution in cyclonic rings  

E-Print Network (OSTI)

WATER SASS DISTR'-NUT(ON Til Cy'UON I i RL i( S A Thesis NONA M, RTE JANOPAUL Submitted to the Gvsdust CoiieSe of Texas A&N Univetslty Pst'tiel fuifl11meot of the te(N|ltem 1'lt ot the de[ ee of RASTER OP SC1ENCE i)eceml:er 1979 Nv jot Sue... lect: Phy, . ical Ocean Staphy NATRR MASS DTSPRTblJTTON 1N C". CJ. ONTO RTNGS NONA MARIE . TANOPAUL Approved as to style. and content by: (Chairman. of Committee) (Member) I( December 1979 ABS'IRACT Water Mass Distribution in Cyclonic Rings...

Janopaul, Mona Marie

2012-06-07T23:59:59.000Z

360

High Resolution BPM Upgrade for the ATF Damping Ring at KEK  

E-Print Network (OSTI)

A beam position monitor (BPM) upgrade at the KEK Accelerator Test Facility (ATF) damping ring has been accomplished, carried out by a KEK/FNAL/SLAC collaboration under the umbrella of the global ILC R&D effort. The upgrade consists of a high resolution, high reproducibility read-out system, based on analog and processing, and also implements a new automatic gain error correction schema. The technical concept and realization as well as results of beam studies are presented.

Eddy, N; Fellenz, B; Gianfelice-Wendt, E; Prieto, P; Rechenmacher, R; Semenov, A; Voy, D; Wendt, M; Zhang, D; Terunuma, N; Urakawa, J

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

An apparatus for measuring turn-by-turn transverse beam profile in electron storage rings  

SciTech Connect

A new apparatus is designed to measure the beam profile turn-by-turn using synchrotron light. The apparatus consists of optical fibers, photo multiplier tubes and digitizers. It is cost efficient and easy to operate. Monte Carlo simulations have shown that the apparatus has an acceptable resolution. The concept has been tested preliminarily at the SLC damping ring, and a full equipment is being set up at CESR to observe coherent beam-beam phenomenon.

Chen, T.; Siemann, R.H. [Stanford Linear Accelerator Center, CA (United States); Hartill, D.; Smith, S. [Cornell Univ., Ithaca, NY (United States)

1996-06-01T23:59:59.000Z

362

EMBEDDED DETERMINISTIC TEST FOR SYSTEMS-ON-A-CHIP  

E-Print Network (OSTI)

EMBEDDED DETERMINISTIC TEST FOR SYSTEMS-ON-A-CHIP #12;EMBEDDED DETERMINISTIC TEST FOR SYSTEMSMaster University (Electrical and Computer Engineering) Hamilton, Ontario TITLE: EMBEDDED DETERMINISTIC TEST framework for test data compression that is applicable to SOCs comprising IP-protected blocks. Experimental

Nicolici, Nicola

363

Seneca Compressed Air Energy Storage (CAES) Project  

SciTech Connect

Compressed Air Energy Storage (CAES) is a hybrid energy storage and generation concept that has many potential benefits especially in a location with increasing percentages of intermittent wind energy generation. The objectives of the NYSEG Seneca CAES Project included: for Phase 1, development of a Front End Engineering Design for a 130MW to 210 MW utility-owned facility including capital costs; project financials based on the engineering design and forecasts of energy market revenues; design of the salt cavern to be used for air storage; draft environmental permit filings; and draft NYISO interconnection filing; for Phase 2, objectives included plant construction with a target in-service date of mid-2016; and for Phase 3, objectives included commercial demonstration, testing, and two-years of performance reporting. This Final Report is presented now at the end of Phase 1 because NYSEG has concluded that the economics of the project are not favorable for development in the current economic environment in New York State. The proposed site is located in NYSEG’s service territory in the Town of Reading, New York, at the southern end of Seneca Lake, in New York State’s Finger Lakes region. The landowner of the proposed site is Inergy, a company that owns the salt solution mining facility at this property. Inergy would have developed a new air storage cavern facility to be designed for NYSEG specifically for the Seneca CAES project. A large volume, natural gas storage facility owned and operated by Inergy is also located near this site and would have provided a source of high pressure pipeline quality natural gas for use in the CAES plant. The site has an electrical take-away capability of 210 MW via two NYSEG 115 kV circuits located approximately one half mile from the plant site. Cooling tower make-up water would have been supplied from Seneca Lake. NYSEG’s engineering consultant WorleyParsons Group thoroughly evaluated three CAES designs and concluded that any of the designs would perform acceptably. Their general scope of work included development of detailed project construction schedules, capital cost and cash flow estimates for both CAES cycles, and development of detailed operational data, including fuel and compression energy requirements, to support dispatch modeling for the CAES cycles. The Dispatch Modeling Consultant selected for this project was Customized Energy Solutions (CES). Their general scope of work included development of wholesale electric and gas market price forecasts and development of a dispatch model specific to CAES technologies. Parsons Brinkerhoff Energy Storage Services (PBESS) was retained to develop an air storage cavern and well system design for the CAES project. Their general scope of work included development of a cavern design, solution mining plan, and air production well design, cost, and schedule estimates for the project. Detailed Front End Engineering Design (FEED) during Phase 1 of the project determined that CAES plant capital equipment costs were much greater than the $125.6- million originally estimated by EPRI for the project. The initial air storage cavern Design Basis was increased from a single five million cubic foot capacity cavern to three, five million cubic foot caverns with associated air production wells and piping. The result of this change in storage cavern Design Basis increased project capital costs significantly. In addition, the development time required to complete the three cavern system was estimated at approximately six years. This meant that the CAES plant would initially go into service with only one third of the required storage capacity and would not achieve full capability until after approximately five years of commercial operation. The market price forecasting and dispatch modeling completed by CES indicated that the CAES technologies would operate at only 10 to 20% capacity factors and the resulting overall project economics were not favorable for further development. As a result of all of these factors, the Phase 1 FEED developed an installe

None

2012-11-30T23:59:59.000Z

364

Compressed Quantum Simulation of the Ising Model  

Science Journals Connector (OSTI)

Jozsa et al. [Proc. R. Soc. A 466, 809 2009)] have shown that a match gate circuit running on n qubits can be compressed to a universal quantum computation on log?(n)+3 qubits. Here, we show how this compression can be employed to simulate the Ising interaction of a 1D chain consisting of n qubits using a universal quantum computer running on log?(n) qubits. We demonstrate how the adiabatic evolution can be realized on this exponentially smaller system and how the magnetization, which displays a quantum phase transition, can be measured. This shows that the quantum phase transition of very large systems can be observed experimentally with current technology.

B. Kraus

2011-12-14T23:59:59.000Z

365

Compression of cooked freeze-dried carrots  

E-Print Network (OSTI)

. Reduction in volume of up to 18-fold can be obtained by com- pressing dehydrated vegetables (Rabman, 1969). During World War II, the United Kingdom produced dehydrated cabbage and carrots in compressed blocks (Gooding and Rolfe, 1967). Fairbrother (1968...-propanol at low concentration by freeze-drying carbohydrate solutions. J. of Food Sci. 37:617. Flosdorf, E. W. 1949. "Freeze-drying, " Reinhold Publishing Co. , New York. Gooding, E. B. B. and Rolfe, E. J. 1957. Some Recent Work on Dehy- dration...

Macphearson, Bruce Alan

2012-06-07T23:59:59.000Z

366

Efficient Parallel Text Compression on GPUs  

E-Print Network (OSTI)

is the denominator of the probability and cumulative distribution, N is the number of characters in the input sequence. 2: Output: output contains compressed data, a big number. 3: for k = 1 to N do 4: /* Compute new base and length according to equation (4...[idx + +] = b >> 24 18: b big number multiplication. 1: Input: data = numerators of p(sj), D = denominator of p(sj). 2: Output: power contains right shift offset of each symbol, data = respective...

Zhang, Xiaoxi

2012-02-14T23:59:59.000Z

367

State Energy Program Helping Arkansans Convert to Compressed Natural Gas |  

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

State Energy Program Helping Arkansans Convert to Compressed State Energy Program Helping Arkansans Convert to Compressed Natural Gas State Energy Program Helping Arkansans Convert to Compressed Natural Gas January 25, 2012 - 4:30pm Addthis The Arkansas Energy Office recently launched a Compressed Natural Gas Conversion Rebate Program, which provides incentives for fleets and individuals to purchase and/or convert their Arkansas-licensed vehicles to compressed natural gas (CNG). | All Rights Reserved. The Arkansas Energy Office recently launched a Compressed Natural Gas Conversion Rebate Program, which provides incentives for fleets and individuals to purchase and/or convert their Arkansas-licensed vehicles to compressed natural gas (CNG). | All Rights Reserved. Grayson Bryant Project Officer -- State Energy Program

368

Alternative Fuels Data Center: Public Access to State Compressed Natural  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Public Access to State Public Access to State Compressed Natural Gas (CNG) Fueling Stations to someone by E-mail Share Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Facebook Tweet about Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Twitter Bookmark Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Google Bookmark Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Delicious Rank Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on Digg Find More places to share Alternative Fuels Data Center: Public Access to State Compressed Natural Gas (CNG) Fueling Stations on

369

Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG)  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Deregulation of Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel to someone by E-mail Share Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Facebook Tweet about Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Twitter Bookmark Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Google Bookmark Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Delicious Rank Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Digg Find More places to share Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on AddThis.com...

370

Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG)  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Deregulation of Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel to someone by E-mail Share Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Facebook Tweet about Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Twitter Bookmark Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Google Bookmark Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Delicious Rank Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on Digg Find More places to share Alternative Fuels Data Center: Deregulation of Compressed Natural Gas (CNG) as a Motor Fuel on AddThis.com...

371

Efficient Joins with Compressed Bitmap Indexes  

SciTech Connect

We present a new class of adaptive algorithms that use compressed bitmap indexes to speed up evaluation of the range join query in relational databases. We determine the best strategy to process a join query based on a fast sub-linear time computation of the join selectivity (the ratio of the number of tuples in the result to the total number of possible tuples). In addition, we use compressed bitmaps to represent the join output compactly: the space requirement for storing the tuples representing the join of two relations is asymptotically bounded by min(h; n . cb), where h is the number of tuple pairs in the result relation, n is the number of tuples in the smaller of the two relations, and cb is the cardinality of the larger column being joined. We present a theoretical analysis of our algorithms, as well as experimental results on large-scale synthetic and real data sets. Our implementations are efficient, and consistently outperform well-known approaches for a range of join selectivity factors. For instance, our count-only algorithm is up to three orders of magnitude faster than the sort-merge approach, and our best bitmap index-based algorithm is 1.2x-80x faster than the sort-merge algorithm, for various query instances. We achieve these speedups by exploiting several inherent performance advantages of compressed bitmap indexes for join processing: an implicit partitioning of the attributes, space-efficiency, and tolerance of high-cardinality relations.

Computational Research Division; Madduri, Kamesh; Wu, Kesheng

2009-08-19T23:59:59.000Z

372

Approximating Artinian Rings by Gorenstein Rings and 3-Standardness of the Maximal Ideal  

E-Print Network (OSTI)

associated to an Artin local ring, called its Gorenstein colength . We study the basic properties and give bounds on this number in this chapter. We extend results due to W. Teter, C.Huneke and A. Vraciu by studying the relation of Gorenstein colength...

Hariharan, Ananthnarayan

2009-07-23T23:59:59.000Z

373

Circumference Correction Chicanes for Damping Rings P. Emma, T. Raubenheimer  

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

Circumference Correction Chicanes for Circumference Correction Chicanes for Damping Rings P. Emma, T. Raubenheimer August 14,1998 1 Introduction Several large low-emittance damping rings are presently being designed to meet the requirements of future linear colliders. These rings tend to have relatively large circumferences ∼300 m so that they can damp many trains of bunches at the same time. With the large circumference, the path length around the ring may become quite sensitive to thermal and ground motion effects. In addition, most of the rings include damping wigglers whose path length varies with their strength. In e-/e+ storage rings, the beam revolution time is determined by the rf frequency. Thus, a change in the nominal path length will cause a change in both the beam energy and the

374

Unicell structure for superconducting storage rings  

SciTech Connect

Mechanically integrated, magnetically decoupled storage rings were designed for a heavy ion collider for 100 GeV/amu Au, at B = 2.7T. New concepts were developed, including detailed engineering design and cost estimates. A ''unicell'' contains a half-cell of both rings within a single He vessel. The unicell design is optimized for economical mass production. Survey pads welded to the laminations provide external fiducials to locate the magnet cores. Roller bearing self aligning supports accommodate cool-down shrinkage. The design tolerates relative motion of components resulting from longitudinal shrinkage in the approx.15 m long unicell without affecting performance. Magnetic and physical lengths are the same, eliminating waste space. ''Achromatic'' quadrupoles with sextupoles at both ends are located on a common precision beam tube which aligns and supports a pick-up electrode. The unicell accommodates longer dipoles compared to conventional designs, reducing B/sub max/, stored energy, and the volume of iron and superconductor. Applications to future machines will be discussed.

Danby, G.; DeVito, B.; Jackson, J.; Keohane, G.; Lee, Y.Y.; Phillips, R.; Plate, S.; Repeta, L.; Skaritka, J.; Smith, L.

1985-01-01T23:59:59.000Z

375

A CAVITY RING-DOWN SPECTROSCOPY MERCURY CONTINUOUS EMISSION MONITOR  

SciTech Connect

The construction of the sampling system was completed during the past quarter. The sampling system has been built on a 3 feet x 4 feet x 2 inch breadboard table. The laser system, all the associated optics, and the mounts and hardware needed to couple the UV light into the fiber optic have also been condensed and placed on an identical 3 feet x 4 feet x 2 inch breadboard table. This reduces the footprint of each system for ease of operation at a field test facility. The two systems are only connected with a fiber optic, to bring the UV light to the CRD cavity, and a single coaxial cable used to apply a voltage to the diode seed laser to scan the frequency over the desired mercury transition. SRD software engineers applied a couple of software fixes to correct the problems of the diode seed laser drifting or mode hopping. Upon successful completion of the software fixes another long-term test was conducted. A nearly 3 day long, 24 hours/day, test was run to test out the new subroutines. Everything appeared to work as it should and the mercury concentrations were accurately reported for the entire test, with the exception of a small interval of time when the intensity of the UV light dropped low enough that the program was no longer triggering properly. After adjusting the power of the laser the program returned to proper operation. With the successful completion of a relatively long test SRD software engineer incorporated the new subroutine into an entirely new program. This program operates the CRD instrument automatically as a continuous emissions monitor for mercury. In addition the program also reports the concentration of SO{sub 2} determined in the sample flue gas stream. Various functions, operation of, and a description of the new program have been included with this report. This report concludes the technical work associated with Phase II of the Cavity Ring-Down project for the continuous detection of trace levels of mercury. The project is presently gearing up for additional testing in preparation for a field test to be conducted at the DOE/NETL pilot plant facility in Pittsburgh, Pennsylvania.

Christopher C. Carter

2004-03-31T23:59:59.000Z

376

MUON STORAGE RINGS FOR 6D PHASE SPACE COOLING.  

SciTech Connect

We describe several storage ring designs for reducing the 6-dimensional phase space of circulating muon beams. These rings utilize quadrupole and dipole magnets as well as wedge-shaped, liquid-hydrogen, energy-loss absorbers and energy compensating rf cavities. We obtain evaluations of their cooling performance by particle tracking simulation. Such rings are potentially useful for future Neutrino Factories or Muon Colliders as well as for existing facilities in which cooled, intense muon beams could enhance their physics programs.

KIRK,H.CLINE,D.FUKUI,Y.GARREN,A.

2003-05-12T23:59:59.000Z

377

Excitation energy dependence of the exciton inner ring  

Science Journals Connector (OSTI)

We report on the excitation energy dependence of the inner ring in the exciton emission pattern. The contrast of the inner ring is found to decrease with lowering excitation energy. Excitation by light tuned to the direct exciton resonance is found to effectively suppress excitation-induced heating of indirect excitons and facilitate the realization of a cold and dense exciton gas. The excitation energy dependence of the inner ring is explained in terms of exciton transport and cooling.

Y. Y. Kuznetsova, J. R. Leonard, L. V. Butov, J. Wilkes, E. A. Muljarov, K. L. Campman, and A. C. Gossard

2012-04-30T23:59:59.000Z

378

A Compact Ring Design with Tunable Momentum Compaction  

SciTech Connect

A storage ring with tunable momentum compaction has the advantage in achieving different RMS bunch length with similar RF capacity, which is potentially useful for many applications, such as linear collider damping ring and predamping ring where injected beam has a large energy spread and a large transverse emittance. A tunable bunch length also makes the commissioning and fine tuning easier in manipulating the single bunch instabilities. In this paper, a compact ring design based on a supercell is presented, which achieves a tunable momentum compaction while maintaining a large dynamic aperture.

Sun, Y.; /SLAC; ,

2012-05-17T23:59:59.000Z

379

Electronically tunable active antenna using microstrip annular ring  

E-Print Network (OSTI)

&M University Chair oi' Advisory Committee: Dr. Kai Chang The use of the annular ring antenna as an active antenna. element was investi- gated. A circuit model of the antenna derived by considering the annular ring antenna, as s, radial transmission line... antenna. 13 16 10 The annular ring antenna, modeled as radial transmission lines snd load admit tances. 19 11 The complete circuit model of the annular ring antenna. 22 12 Flow chart of the input impedance program. . 13 Input impedance of the TMrz...

Miller, Richard Earl

2012-06-07T23:59:59.000Z

380

Power Series Over Noetherian Rings May 10, 2010 William Heinzer ...  

E-Print Network (OSTI)

May 10, 2010 ... ian rings and of the induced spectral maps associated with various ..... R1. [81, pages 112-118], the proof of the Noetherian property took.

1911-00-51T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Formation Mechanism and Low-Temperature Instability of Exciton Rings  

Science Journals Connector (OSTI)

The macroscopic rings observed in the photoluminescence patterns of excitons in coupled quantum wells are explained by a mechanism of carrier imbalance, transport, and recombination. The rings originate from the spatial separation of p and n carriers, and occur at the interface of the p and n domains, where excitons are generated. We explore the states of excitons in the ring over a range of temperatures down to 380???mK and report a transition of the ring into a periodic array of aggregates, a new low-temperature ordered exciton state.

L. V. Butov, L. S. Levitov, A. V. Mintsev, B. D. Simons, A. C. Gossard, and D. S. Chemla

2004-03-18T23:59:59.000Z

382

UAL-BASED SIMULATION ENVIRONMENT FOR SPALLATION NEUTRON SOURCE RING.  

SciTech Connect

This paper outlines the major activities and applications of the Unified Accelerator Library environment for the Spallation Neutron Source (SNS) Ring.

MALITSKY,N.; SMITH,J.; WEI,J.

1999-03-29T23:59:59.000Z

383

A study of the microstrip ring resonator and its applications  

E-Print Network (OSTI)

(Continued) CHAPTER F. Effects of the Package Parasitics on the Resonant Frequency G. Experimental Results H. Double Varactor Ring Resonator Page 76 83 88 V PIN DIODES IN A RING RESONATOR AS A SWITCH/FILTER 92 A, PIN Diode Equivalent Circuit B... function of gap sise for the ring resonator in Fig. 19 and Fig. 21. . A varactor tuned ring resonator. C-V traces for the (a) forward and (b) reverse biased varactor diode. . Diagram of a varactor package cross-section. Equivalent circuit of a...

Martin, Tracy Scott

2012-06-07T23:59:59.000Z

384

Structure of rings in vitreous SiO2  

Science Journals Connector (OSTI)

The structure of n-fold rings in vitreous SiO2 is investigated using molecular-dynamics configurations. A recently developed interaction potential for SiO2 consisting of long-range Coulomb interactions, the effect of electronic polarizability, and three-body covalent forces is used in the molecular-dynamics study of the vitreous state. Results for the statistics of rings and distribution of interatomic distances and bond angles in the rings are presented for the vitreous state. The statistics of rings for the molten state is also discussed.

José P. Rino; Ingvar Ebbsjö; Rajiv K. Kalia; Aiichiro Nakano; Priya Vashishta

1993-02-01T23:59:59.000Z

385

A parallel and matrix free framework for global stability analysis of compressible flows  

E-Print Network (OSTI)

An numerical iterative framework for global modal stability analysis of compressible flows using a parallel environment is presented. The framework uses a matrix-free implementation to allow computations of large scale problems. Various methods are tested with regard to convergence acceleration of the framework. The methods consist of a spectral Cayley transformation used to select desired Eigenvalues from a large spectrum, an improved linear solver and a parallel block-Jacobi preconditioning scheme.

Henze, O; Sesterhenn, J

2015-01-01T23:59:59.000Z

386

Quantum codes over Finite Frobenius Rings  

E-Print Network (OSTI)

polynomial rX i=1 aiX r i where ai 2 Z=(p n). Let = exp(2 i=pn) then, (a) = a is a generating character. 2. Inner product Symplectic inner product Let (ajb) and (a 0 jb 0 ) denote two codewords in the code C. Then the symplectic inner product... of the two vectors is de ned as (b:a 0 b 0 :a). If C is the code then its dual C? is de ned as C? = f(ajb)j (b:a0 b0:a) = 1forall(a0jb0) 2 Cg Lemma 1 Let be a character of a nite frobenius ring R. Then is a right generating character if and only...

Sarma, Anurupa

2012-10-19T23:59:59.000Z

387

Introductory statistical mechanics for electron storage rings  

SciTech Connect

These lectures introduce the beam dynamics of electron-positron storage rings with particular emphasis on the effects due to synchrotron radiation. They differ from most other introductions in their systematic use of the physical principles and mathematical techniques of the non-equilibrium statistical mechanics of fluctuating dynamical systems. A self-contained exposition of the necessary topics from this field is included. Throughout the development, a Hamiltonian description of the effects of the externally applied fields is maintained in order to preserve the links with other lectures on beam dynamics and to show clearly the extent to which electron dynamics in non-Hamiltonian. The statistical mechanical framework is extended to a discussion of the conceptual foundations of the treatment of collective effects through the Vlasov equation.

Jowett, J.M.

1986-07-01T23:59:59.000Z

388

Near-rings of group mappings  

E-Print Network (OSTI)

)[ = m we have A f(v ) 1 1 1 1 f(v ) and m is minimal with this property. On the other hand f(v ) = f(Av ) = A f(v ) =AA f(v ) = A f(v), which implies r=O. 1 1 1 1 1 Conversely, suppose m divides n and choose v 6 6 , v 6 8 Define f:G ~ G by f(0) = 0..., f(A v ) = A v , j = 1, 2, . . . , n and f(v) = 0 otherwise. Since m divides n, f is well defined, and clearly f E C(A). Let H be an additive subgroup of the near-ring N. We say H is N-invariant if NH c H and HN c H. Lemma 1. 2: [5] Let H be a C...

Galli, John C

2012-06-07T23:59:59.000Z

389

ROCKY MOUNTAIN OILFIELD TESTING CENTER PROJECT TEST RESULTS  

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

BEAM MOUNTED GAS COMPRESSOR BEAM MOUNTED GAS COMPRESSOR (JACGAS COMPRESSOR) MARCH 3, 1998 FC970004/97PT23 RMOTC Test Report Number 97PT23 Jacgas Compressor Morrison International Iron Horse Compression Ltd. 9852-33 Avenue Edmonton, Alberta T6N 1C6 (403) 462-6847 David H. Doyle, Project Manager Rocky Mountain Oilfield Testing Center March 3, 1998 Introduction Gas compressors that mount on the walking beam of an oil well pumping unit have been tried with mixed success for many years. Gas compression at the wellhead instead of further downstream can 'increase both oil and gas production by reducing the casinghead gas pressure. Excess pressure on the annulus of the well reduces fluid inflow and restricts production. In old, shallow wells, the small amount of pressure (50 psi) may be sufficient to prevent the well from producing economically. Other applications include the unloading of water

390

Onboard low-complexity compression of solar Shuang Wang, Lijuan Cui, Samuel Cheng, Lina Stankovic, Vladimir Stankovic  

E-Print Network (OSTI)

ForReview Only 1 Onboard low-complexity compression of solar images Shuang Wang, Lijuan Cui, Samuel for onboard coding of solar images since it exploits correlation between different views without compromising as performing disparity estimation, at the decoder side. The proposed algorithm is tested on the stereo solar

Cheng, Samuel

391

1308 IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 47, NO. 10, OCTOBER 2000 ECG Signal Compression Using Analysis by  

E-Print Network (OSTI)

1308 IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING, VOL. 47, NO. 10, OCTOBER 2000 ECG Signal--In this paper, an elecrocardiogram (ECG) com- pression algorithm, called analysis by synthesis ECG compressor with several well-known ECG compression algorithms and was found to be superior at all tested bit rates. A mean

Zigel, Yaniv

392

Reflectivity of Shock Compressed Xenon Plasma  

E-Print Network (OSTI)

Experimental results for the reflection coefficient of shock-compressed dense Xenon plasmas at pressures of 1.6 - 17 GPa and temperatures around 30 000 K using a laser beam with \\lambda = 1.06 10^-6 m are compared with calculations based on different theoretical approaches to the dynamical collision frequency. It is found that a reasonable description can be given assuming a spatial electron density profile corresponding to a finite width of the shock wave front of about $2 10^-6 m.

Reinholz, H; Wierling, A; Mintsev, V; Gryaznov, V

2002-01-01T23:59:59.000Z

393

Entangled-photon compressive ghost imaging  

SciTech Connect

We have experimentally demonstrated high-resolution compressive ghost imaging at the single-photon level using entangled photons produced by a spontaneous parametric down-conversion source and using single-pixel detectors. For a given mean-squared error, the number of photons needed to reconstruct a two-dimensional image is found to be much smaller than that in quantum ghost imaging experiments employing a raster scan. This procedure not only shortens the data acquisition time, but also suggests a more economical use of photons for low-light-level and quantum image formation.

Zerom, Petros [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States); Chan, Kam Wai Clifford [Rochester Optical Manufacturing Company, 1260 Lyell Avenue, Rochester, New York 14606 (United States); Howell, John C. [Department of Physics and Astronomy, University of Rochester, 500 Wilson Boulevard, Rochester, New York 14627 (United States); Boyd, Robert W. [Institute of Optics, University of Rochester, Rochester, New York 14627 (United States); Department of Physics and Astronomy, University of Rochester, 500 Wilson Boulevard, Rochester, New York 14627 (United States); Department of Physics, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5 (Canada)

2011-12-15T23:59:59.000Z

394

Compressive direct measurement of the quantum wavefunction  

E-Print Network (OSTI)

The direct measurement of a complex wavefunction has been recently realized by using weak-values. In this paper, we introduce a method that exploits sparsity for compressive measurement of the transverse spatial wavefunction of photons. The procedure involves a weak measurement in random projection operators in the spatial domain followed by a post-selection in the momentum basis. Using this method, we experimentally measure a 192-dimensional state with a fidelity of $90%$ using only $25$ percent of the total required measurements. Furthermore, we demonstrate measurement of a 19200 dimensional state; a task that would require an unfeasibly large acquiring time with the conventional direct measurement technique.

Mohammad Mirhosseini; Omar S. Magaña-Loaiza; Seyed Mohammad Hashemi Rafsanjani; Robert W. Boyd

2014-04-10T23:59:59.000Z

395

Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Dealer License to someone by E-mail Dealer License to someone by E-mail Share Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Dealer License on Facebook Tweet about Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Dealer License on Twitter Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Dealer License on Google Bookmark Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Dealer License on Delicious Rank Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Dealer License on Digg Find More places to share Alternative Fuels Data Center: Compressed Natural Gas (CNG) and Propane Dealer License on AddThis.com... More in this section... Federal State Advanced Search All Laws & Incentives Sorted by Type

396

Fact Sheet: Isothermal Compressed Air Energy Storage (October 2012)  

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

SustainX SustainX American Recovery and Reinvestment Act (ARRA) Isothermal Compressed Air Energy Storage Demonstrating a modular, market-ready energy storage system that uses compressed air as a storage medium SustainX will demonstrate an isothermal compressed air energy storage (ICAES) system. Energy can be stored in compressed air, with minimal energy losses, and released when the air is later allowed to expand. Many traditional compressed air energy storage (CAES) projects store energy in underground geological formations such as salt caverns. However, in these systems, the air warms when it is compressed and cools when it is expanded. CAES systems generally use gas combustion turbines to reheat the cooled air before expansion. This process creates inefficiencies and emissions.

397

ESTR -Energy Saving Token Ring Protocol for Wireless Sensor Networks  

E-Print Network (OSTI)

ESTR - Energy Saving Token Ring Protocol for Wireless Sensor Networks Faruk Bagci, Theo Ungerer a long lifetime of the sensor network and the application it is important to save energy. A sensor node control (MAC) protocol for wireless sensor networks, called Energy Saving Token Ring Protocol (ESTR). ESTR

Ungerer, Theo

398

Free-energy minima for helium in a ring  

Science Journals Connector (OSTI)

Bloch has suggested that minima in the free energy as a function of angular momentum are responsible for the superfluidity of He4 in a ring. It is shown in this paper that at finite temperatures, the critical velocity is much too small, and hence minima in the free energy are not the cause of superfluidity in a ring.

F. A. Blood; Jr.

1974-08-01T23:59:59.000Z

399

Updating the Tyrol tree-ring dataset , U. Bntgen1  

E-Print Network (OSTI)

Updating the Tyrol tree-ring dataset J. Esper1 , U. Büntgen1 , D. Frank1 , T. Pichler2 , K in palaeoclimatology The Tyrol dataset is a collection of 71 Picea abies ring width measurement series from the study area in Tyrol in the central Alps. We here describe efforts of updating this relevant dataset

Nicolussi, Kurt

400

Magnetic properties of small multi-layered rings  

E-Print Network (OSTI)

Thin film rings can be an alternative geometry of magnetic memory cells, in which data bits are stored by the chirality of the flux-closed or 'vortex' state of the ring. The absence of the stray field in the vortex state ...

Jung, Wonjoon

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Design and Evaluation of Hierarchical Rings with Deflection Routing  

E-Print Network (OSTI)

that enable us to mostly maintain the simplicity of traditional simple ring topologies while providing higher of several MUXes to allow traffic to enter and leave, and one pipeline register. Its latency is typically and commercial multicore processors have utilized ring

Mutlu, Onur

402

Regular ring dynamics in AX2 tetrahedral glasses  

Science Journals Connector (OSTI)

We review the experimental evidence and qualitative arguments for the existence of small highly regular rings of bonds in amorphous (a-)SiO2 and selected other AX2 tetrahedral glasses. The structure and vibrations of planar 3-rings and regular puckered 4-rings in a-SiO2 are then modeled using Born central and noncentral forces. The vibrational coupling of these rings to the more disordered glass network is modeled by attaching a Bethe lattice at each connection. The calculated vibrational properties of the breathing modes of the rings are found to be quite consistent with the observed frequencies, linewidths, and isotope shifts of the sharp lines D1 and D2 seen in the Raman spectra of a-SiO2. The results support the previous assignment of D2 (606 cm-1) to a planar 3-ring and D1 (495 cm-1) to a regular ring. Similar calculations for a-GeO2 are consistent with the suggestion that this material contains a substantial concentration of nearly planar 3-rings. Our methods can be generalized to treat similar forms of intermediate range order in glasses having other network connectivities.

R. A. Barrio; F. L. Galeener; E. Martínez; R. J. Elliott

1993-12-01T23:59:59.000Z

403

When indexing equals compression: Experiments with compressing suffix arrays and applications  

Science Journals Connector (OSTI)

We report on a new experimental analysis of high-order entropy-compressed suffix arrays, which retains the theoretical performance of previous work and represents an improvement in practice. Our experiments indicate that the resulting text index offers ... Keywords: Burrows--Wheeler Transform, Entropy, suffix array, text indexing

Luca Foschini; Roberto Grossi; Ankur Gupta; Jeffrey Scott Vitter

2006-10-01T23:59:59.000Z

404

High load operation in a homogeneous charge compression ignition engine  

DOE Patents (OSTI)

A homogeneous charge compression ignition engine is set up by first identifying combinations of compression ratio and exhaust gas percentages for each speed and load across the engines operating range. These identified ratios and exhaust gas percentages can then be converted into geometric compression ratio controller settings and exhaust gas recirculation rate controller settings that are mapped against speed and load, and made available to the electronic

Duffy, Kevin P. (Metamora, IL); Kieser, Andrew J. (Morton, IL); Liechty, Michael P. (Chillicothe, IL); Hardy, William L. (Peoria, IL); Rodman, Anthony (Chillicothe, IL); Hergart, Carl-Anders (Peoria, IL)

2008-12-23T23:59:59.000Z

405

Improving Compressed Air System Performance: A Sourcebook for Industry  

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

This sourcebook is designed to provide compressed air system users with a reference that outlines opportunities for system performance improvements. It is not intended to be a comprehensive technical text on improving compressed air systems, but rather a document that makes compressed air system users aware of the performance improvement potential, details some of the significant opportunities, and directs users to additional sources of assistance.

406

Recent Progress at the Photon Factory Storage Ring  

SciTech Connect

The present status of the Photon Factory storage ring (PF ring) at High Energy Accelerator Research Organization (KEK), including recent progress for the machine developments, is reported. Due to the establishment of the simultaneous injection to the three rings (PF, HER, LER) from the KEK injector linac since April 2009, the PF ring currently operates almost all the time in a top-up mode available to users at a stored current of 450 mA in multi-bunch mode, and at a stored current of 51 mA in single-bunch mode, except the time while the KEK linac injection to the PF-AR twice daily. The third in-vacuum short gap undulator was installed at PF ring in September 2009.

Miyauchi, Hiroshi [Photon Factory, High Energy Accelerator Research Organization, KEK, Oho, Tsukuba, Ibaraki 305-0801 (Japan)

2010-06-23T23:59:59.000Z

407

DOE Hydrogen Analysis Repository: Carbon Dioxide Compression, Transport,  

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

Carbon Dioxide Compression, Transport, and Storage Carbon Dioxide Compression, Transport, and Storage Project Summary Full Title: Techno-Economic Models for Carbon Dioxide Compression, Transport, and Storage & Correlations for Estimating Carbon Dioxide Density and Viscosity Project ID: 195 Principal Investigator: David McCollum Brief Description: This project addresses several components of carbon capture and storage (CCS) costs, provides technical models for determining the engineering and infrastructure requirements of CCS, and describes some correlations for estimating CO2 density and viscosity. Keywords: Pipeline, transportation, greenhouse gases (GHG), costs, technoeconomic analysis Purpose Estimate costs of carbon dioxide capture, compression, transport, storage, etc., and provide some technical models for determining the engineering and

408

Assessing the benefits of DCT compressive sensing for computational electromagnetics  

E-Print Network (OSTI)

Computational electromagnetic problems are becoming exceedingly complex and traditional computation methods are simply no longer good enough for our technologically advancing world. Compressive sensing theory states that ...

D'Ambrosio, Kristie (Kristie L.)

2011-01-01T23:59:59.000Z

409

Workshop Notes from ""Compressed Natural Gas and Hydrogen Fuels...  

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

Workshop Notes from ""Compressed Natural Gas and Hydrogen Fuels: Lessons Learned for the Safe Deployment of Vehicles"" Workshop, December 10-11, 2009 Workshop Notes from...

410

Workshop Agenda: Compressed Natural Gas and Hydrogen Fuels, Lesssons...  

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

to ensure safe use of onboard and bulk storage hydrogen and compressed natural gas tanks * Enhance domestic and international harmonization between natural gas and hydrogen...

411

VIDEO PRESENTATION AND COMPRESSION Borko Furht and Raymond Westwater  

E-Print Network (OSTI)

9 VIDEO PRESENTATION AND COMPRESSION Borko Furht and Raymond Westwater Florida Atlantic University........................................................................................................................ 172 1.1 VIDEO REPRESENTATION AND FORMATS.................................................................................. 172 1.2 VIDEO INFORMATION UNITS

Furht, Borko

412

Advanced CFD Models for High Efficiency Compression Ignition Engines  

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

Advanced CFD models for high efficiency compression-ignition engines can be used to show how turbulence-chemistry interactions influence autoignition and combustion.

413

H2A Delivery: Forecourt Compression & Storage Optimization (Part...  

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

Land Areas Forecourt Storage and Compression Options Forecourt and Gas Infrastructure Optimization Home About the Fuel Cell Technologies Office Hydrogen Production Hydrogen...

414

Experiment Hazard Class 5.4 - Compressed Gas Cylinders  

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

or in storage. There is no provision for a standby situation. Consultation with PFS-FEC fire protection when planning experiments that involve compressed flammable gas and...

415

National Ignition Facility (NIF): Under Pressure: Ramp-Compression...  

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

National Ignition Facility (NIF): Under Pressure: Ramp-Compression Smashes Record American Fusion News Category: National Ignition Facility Link: National Ignition Facility (NIF):...

416

Evaluation of the Compressed Air Challenge Training Program: Final Report  

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

This is the final report on an evaluation of the Compressed Air Challenge (CAC) training program, which was designed to provide plant personnel and compressed air system vendors with knowledge and tools required to effect improvements to the energy efficiency and overall performance of plant compressed air systems. The evaluation is based on three main research tasks: analysis of the CAC registration database, interviews with 100 end-user personnel who attended the CAC training, and interviews with 100 compressed air system vendors and consulting engineers who attended the training sessions.

417

Guidelines for Selecting a Compressed Air System Service Provider  

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

This publication is meant to help industrial compressed air users become informed consumers by discussing what to look for when selecting service providers.

418

Evaluation of the Compressed Air Challenge Training Program: Executive Summary  

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

This is the executive summary of a report on an evaluation of the Compressed Air Challenge (CAC) training program, which was designed to provide plant personnel and compressed air system vendors with knowledge and tools required to effect improvements to the energy efficiency and overall performance of plant compressed air systems. The evaluation is based on three main research tasks: analysis of the CAC registration database, interviews with 100 end-user personnel who attended the CAC training, and interviews with 100 compressed air system vendors and consulting engineers who attended the training sessions.

419

A Compressible Advection Approach in Permeation of Elastomer Space Seals.  

E-Print Network (OSTI)

??The preservation of air in manned spacecraft is of grave importance. It is imperative that a comprehensive understanding in the fundamental mechanics of compressible permeation… (more)

Garafolo, Nicholas Gordon

2010-01-01T23:59:59.000Z

420

Saturable inductor and transformer structures for magnetic pulse compression  

DOE Patents (OSTI)

Saturable inductor and transformer for magnetic compression of an electronic pulse, using a continuous electrical conductor looped several times around a tightly packed core of saturable inductor material.

Birx, Daniel L. (Londonderry, NH); Reginato, Louis L. (Orinda, CA)

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

New Methodologies for Analysis of Premixed Charge Compression...  

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

Documents & Publications Numerical Modeling of HCCI Combustion High Fidelity Modeling of Premixed Charge Compression Ignition Engines Modeling of HCCI and PCCI Combustion Processes...

422

Advanced CFD Models for High Efficiency Compression Ignition...  

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

for high efficiency compression-ignition engines can be used to show how turbulence-chemistry interactions influence autoignition and combustion. p-19raja.pdf More Documents &...

423

Multilayer compressive seal for sealing in high temperature devices  

DOE Patents (OSTI)

A mica based compressive seal has been developed exhibiting superior thermal cycle stability when compared to other compressive seals known in the art. The seal is composed of compliant glass or metal interlayers and a sealing (gasket) member layer composed of mica that is infiltrated with a glass forming material, which effectively reduces leaks within the seal. The compressive seal shows approximately a 100-fold reduction in leak rates compared with previously developed hybrid seals after from 10 to about 40 thermal cycles under a compressive stress of from 50 psi to 100 psi at temperatures in the range from 600.degree. C. to about 850.degree. C.

Chou, Yeong-Shyung (Richland, WA); Stevenson, Jeffry W. (Richland, WA)

2007-08-21T23:59:59.000Z

424

Ultra- high pulse intensity amplification and compression in plasma  

Science Journals Connector (OSTI)

This talk provides the summary of experimental research at Princeton on Raman Backscattering (RBS) amplification and compression in plasma [1]. The main subject of the talk is about...

Morozov, Anatoli; Li, Shuanglei; Turnbull, David; Suckewer, Szymon

425

Pdc- The Worldwide Leader in Hydrogen Refueling Station Compression  

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

This presentation by Matther Weaver of Pdc Machines Inc. was given at the was given at the DOE Hydrogen Compression, Storage, and Dispensing Workshop in March 2013.

426

Compact wavefunctions from compressed imaginary time evolution  

E-Print Network (OSTI)

Simulation of quantum systems promises to deliver physical and chemical predictions for the frontiers of technology. Unfortunately, the exact representation of these systems is plagued by the exponential growth of dimension with the number of particles, or colloquially, the curse of dimensionality. The success of approximation methods has hinged on the relative simplicity of physical systems with respect to the exponentially complex worst case. Exploiting this relative simplicity has required detailed knowledge of the physical system under study. In this work, we introduce a general and efficient black box method for many-body quantum systems that utilizes technology from compressed sensing to find the most compact wavefunction possible without detailed knowledge of the system. It is a Multicomponent Adaptive Greedy Iterative Compression (MAGIC) scheme. No knowledge is assumed in the structure of the problem other than correct particle statistics. This method can be applied to many quantum systems such as spins, qubits, oscillators, or electronic systems. As an application, we use this technique to compute ground state electronic wavefunctions of hydrogen fluoride and recover 98% of the basis set correlation energy or equivalently 99.996% of the total energy with $50$ configurations out of a possible $10^7$. Building from this compactness, we introduce the idea of nuclear union configuration interaction for improving the description of reaction coordinates and use it to study the dissociation of hydrogen fluoride and the helium dimer.

Jarrod R. McClean; Alán Aspuru-Guzik

2014-09-25T23:59:59.000Z

427

University of Arizona Compressed Air Energy Storage  

SciTech Connect

Boiled down to its essentials, the grant’s purpose was to develop and demonstrate the viability of compressed air energy storage (CAES) for use in renewable energy development. While everyone agrees that energy storage is the key component to enable widespread adoption of renewable energy sources, the development of a viable scalable technology has been missing. The Department of Energy has focused on expanded battery research and improved forecasting, and the utilities have deployed renewable energy resources only to the extent of satisfying Renewable Portfolio Standards. The lack of dispatchability of solar and wind-based electricity generation has drastically increased the cost of operation with these components. It is now clear that energy storage coupled with accurate solar and wind forecasting make up the only combination that can succeed in dispatchable renewable energy resources. Conventional batteries scale linearly in size, so the price becomes a barrier for large systems. Flow batteries scale sub-linearly and promise to be useful if their performance can be shown to provide sufficient support for solar and wind-base electricity generation resources. Compressed air energy storage provides the most desirable answer in terms of scalability and performance in all areas except efficiency. With the support of the DOE, Tucson Electric Power and Science Foundation Arizona, the Arizona Research Institute for Solar Energy (AzRISE) at the University of Arizona has had the opportunity to investigate CAES as a potential energy storage resource.

Simmons, Joseph; Muralidharan, Krishna

2012-12-31T23:59:59.000Z

428

Compression station key to Texas pipeline project  

SciTech Connect

This was probably the largest pipeline project in the US last year, and the largest in Texas in the last decade. The new compressor station is a key element in this project. TECO, its servicing dealer, and compression packager worked closely throughout the planning and installation stages of the project. To handle the amount of gas required, TECO selected the GEMINI F604-1 compressor, a four-throw, single-stage unit with a six-inch stroke manufactured by Weatherford Enterra Compression Co. (WECC) in Corpus Christi, TX. TECO also chose WECC to package the compressors. Responsibility for ongoing support of the units will be shared among TECO, the service dealer and the packager. TECO is sending people to be trained by WECC, and because the G3600 family of engines is still relatively new, both the Caterpillar dealer and WECC sent people for advanced training at Caterpillar facilities in Peoria, IL. As part of its service commitment to TECO, the servicing dealer drew up a detailed product support plan, encompassing these five concerns: Training, tooling; parts support; service support; and commissioning.

NONE

1996-10-01T23:59:59.000Z

429

Fuel-Free Compressed-Air Energy Storage: Fuel-Free, Ubiquitous Compressed-Air Energy Storage and Power Conditioning  

SciTech Connect

GRIDS Project: General Compression has developed a transformative, near-isothermal compressed air energy storage system (GCAES) that prevents air from heating up during compression and cooling down during expansion. When integrated with renewable generation, such as a wind farm, intermittent energy can be stored in compressed air in salt caverns or pressurized tanks. When electricity is needed, the process is reversed and the compressed air is expanded to produce electricity. Unlike conventional compressed air energy storage (CAES) projects, no gas is burned to convert the stored high-pressure air back into electricity. The result of this breakthrough is an ultra-efficient, fully shapeable, 100% renewable and carbon-free power product. The GCAES™ system can provide high quality electricity and ancillary services by effectively integrating renewables onto the grid at a cost that is competitive with gas, coal and nuclear generation.

None

2010-09-13T23:59:59.000Z

430

VISCOSITY IN PLANETARY RINGS WITH SPINNING SELF-GRAVITATING PARTICLES  

SciTech Connect

Using local N-body simulation, we examine viscosity in self-gravitating planetary rings. We investigate the dependence of viscosity on various parameters in detail, including the effects of particle surface friction. In the case of self-gravitating rings with low optical depth, viscosity is determined by particle random velocity. Inclusion of surface friction slightly reduces both random velocity and viscosity when particle random velocity is determined by inelastic collisions, while surface friction slightly increases viscosity when gravitational encounters play a major role in particle velocity evolution, so that viscous heating balances with increased energy dissipation at collisions due to surface friction. We find that including surface friction changes viscosity in dilute rings up to a factor of about two. In the case of self-gravitating dense rings, viscosity is significantly increased due to the effects of gravitational wakes, and we find that varying restitution coefficients also change viscosity in such dense rings by a factor of about two. We confirm that our numerical results for viscosity in dense rings with gravitational wakes can be well approximated by a semianalytic expression that is consistent with a previously obtained formula. However, we find that this formula seems to overestimate viscosity in dense rings far from the central planet, where temporary gravitational aggregates form. We derive semianalytic expressions that reproduce our numerical results well for the entire range of examined parameters.

Yasui, Yuki; Ohtsuki, Keiji [Department of Earth and Planetary Sciences, Kobe University, Kobe 657-8501 (Japan); Daisaka, Hiroshi [Graduate School of Commerce and Management, Hitotsubashi University, Tokyo 186-8601 (Japan)

2012-05-15T23:59:59.000Z

431

Coherence theory of the ring laser  

Science Journals Connector (OSTI)

Expressions for the fluctuations and correlations of the light emitted by a ring laser with counter-rotating traveling wave modes are derived theoretically. It is shown that the competition of the two modes for the excited atomic population leads to negative correlations between their intensity fluctuations, whose magnitude depends on the detuning of the laser cavity from the atomic line center. As a result of the mode competition, the relative intensity fluctuations do not die out in general as the working point of the laser is raised above threshold at line center, and the emitted light does not become fully coherent as in a conventional laser. The two-time amplitude and intensity correlation functions of the light are calculated at line center, and are shown to be expressible in terms of the eigenfunctions and eigenvalues of a certain Schrödinger equation, in complete analogy with the theory of the single-mode laser. However, the intensity correlation time increases with pump parameter above threshold, unlike that for the single-mode laser.

M. M- Tehrani and L. Mandel

1978-02-01T23:59:59.000Z

432

Predicting the fidelity of JPEG2000 compressed CT images using DICOM header information  

SciTech Connect

Purpose: To propose multiple logistic regression (MLR) and artificial neural network (ANN) models constructed using digital imaging and communications in medicine (DICOM) header information in predicting the fidelity of Joint Photographic Experts Group (JPEG) 2000 compressed abdomen computed tomography (CT) images. Methods: Our institutional review board approved this study and waived informed patient consent. Using a JPEG2000 algorithm, 360 abdomen CT images were compressed reversibly (n = 48, as negative control) or irreversibly (n = 312) to one of different compression ratios (CRs) ranging from 4:1 to 10:1. Five radiologists independently determined whether the original and compressed images were distinguishable or indistinguishable. The 312 irreversibly compressed images were divided randomly into training (n = 156) and testing (n = 156) sets. The MLR and ANN models were constructed regarding the DICOM header information as independent variables and the pooled radiologists' responses as dependent variable. As independent variables, we selected the CR (DICOM tag number: 0028, 2112), effective tube current-time product (0018, 9332), section thickness (0018, 0050), and field of view (0018, 0090) among the DICOM tags. Using the training set, an optimal subset of independent variables was determined by backward stepwise selection in a four-fold cross-validation scheme. The MLR and ANN models were constructed with the determined independent variables using the training set. The models were then evaluated on the testing set by using receiver-operating-characteristic (ROC) analysis regarding the radiologists' pooled responses as the reference standard and by measuring Spearman rank correlation between the model prediction and the number of radiologists who rated the two images as distinguishable. Results: The CR and section thickness were determined as the optimal independent variables. The areas under the ROC curve for the MLR and ANN predictions were 0.91 (95% CI; 0.86, 0.95) and 0.92 (0.87, 0.96), respectively. The correlation coefficients of the MLR and ANN predictions with the number of radiologists who responded as distinguishable were 0.76 (0.69, 0.82, p < 0.001) and 0.78 (0.71, 0.83, p < 0.001), respectively. Conclusions: The MLR and ANN models constructed using the DICOM header information offer promise in predicting the fidelity of JPEG2000 compressed abdomen CT images.

Kim, Kil Joong; Kim, Bohyoung; Lee, Hyunna; Choi, Hosik; Jeon, Jong-June; Ahn, Jeong-Hwan; Lee, Kyoung Ho [Department of Radiation Applied Life Science, Seoul National University College of Medicine, 28 Yongon-dong, Chongno-gu, Seoul, 110-744 (Korea, Republic of); School of Computer Science and Engineering, Seoul National University, 599 Kwanak-Ro, Kwanak-Gu, Seoul, 151-742 (Korea, Republic of); Department of Informational Statistics, Hoseo University, 165, Sechul-ri, Baebang-myeon, Asan-si, Chungcheongnam-do, 336-795 (Korea, Republic of); Department of Statistics, Seoul National University, 599 Kwanak-Ro, Kwanak-Gu, Seoul, 151-742 (Korea, Republic of); Korean Intellectual Property Office, Government Complex-Daejeon, 139 Seonsa-ro, Seo-gu, Daejeon, 302-701 (Korea, Republic of); Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Institute of Radiation Medicine, and Seoul National University Medical Research Center, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-707 (Korea, Republic of)

2011-12-15T23:59:59.000Z

433

Comparative studies of methane and propane as fuels for spark ignition and compression ignition engines  

SciTech Connect

The paper reviews the combustion characteristics of the two fuels and sets out to consider their respective performance in both spark ignition and compression ignition engines. Results of comparative tests involving spark ignition engines over a wide range of operating conditions are presented and discussed. Some of the performance characteristics considered are those relating to power output, efficiency, tendency to knock, cyclic variations, optimum spark requirements and exhaust emissions. Similarly, some of the performance characteristics in compression ignition engines considered include power output, efficiency, tendency towards knock and autoignition, exhaust emissions and low operational temperature problems. Finally, the relative operational safety aspects of the two fuels are evaluated. It is then suggested that in this regard, methane has some excellent physical, chemical and combustion characteristics that makes it a particularly safe fuel.

Karim, G.A.; Wierzba, I.

1983-08-01T23:59:59.000Z

434

ROOM TEMPERATURE COMPRESSION PROPERTIES OF TWO HEATS OF UNIRRADIATED V-4Cr-4Ti  

SciTech Connect

Vanadium alloys are of interest to the Fusion program as potential first wall structural materials. The expected irradiation conditions for the first wall structural material include a range of temperatures where very high hardening caused by a high density of small, but shearable defect clusters results in a type of deformation called "localized deformation". At the onset of yield in a tensile test, a dislocation may move through a grain shearing the obstacles and clearing out a channel. Subsequent dislocations may easily pass through this channel. As the test progresses, more channels form. In the early stages of deformation, it is thought that the plastic deformation is confined to these channels. One important macroscopic result of this deformation behavior is rapid onset of necking in a tensile test and very low uniform elongation. As a means to help understand the range of stress states where localized deformation may adversely affect macroscopic ductility in vanadium alloys, compression test specimens fabricated from two heats of V-4Cr-4Ti are currently under irradiation in the High Flux Isotope Reactor (HFIR). The results of room temperature compression tests on the unirradiated control materials are presented here and compared with uniaxial tensile values from the literature.

Toloczko, Mychailo B.; Kurtz, Richard J.

2004-06-30T23:59:59.000Z

435

The concept of “apparent” Compression Index  

Science Journals Connector (OSTI)

One-dimensional consolidation tests are often performed without accurate control of the initial degree of saturation, since most commercially used testing apparatuses do not permit back-pressuring. As a result...

M. Bardanis; M. Kavvadas

2005-01-01T23:59:59.000Z

436

E-Print Network 3.0 - adult baltic ringed Sample Search Results  

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

baltic ringed Page: << < 1 2 3 4 5 > >> 1 Baltic Sea Environment Proceedings No. 111 Climate Change in Summary: , Finland. Baltic ringed seal pup in collapsed nest. ISSN...

437

Metallic nanoparticle on micro ring resonator for bio optical detection and sensing  

Science Journals Connector (OSTI)

We have numerically investigated the unique effects of metallic nanoparticle on the ring resonator, especially multiple Au nanoparticles on the micro ring resonator with the 4-port...

Haddadpour, Ali; Yi, Yasha

2010-01-01T23:59:59.000Z

438

E-Print Network 3.0 - accelerated vortex ring Sample Search Results  

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

left behind... forces were derived from the vortex rings, assuming all propulsive energy to be compiled in the rings... , ending up in a separate vortex ... Source:...

439

Modeling of coupled thermodynamic and geomechanical performance of underground compressed air energy storage (CAES) in lined rock caverns  

E-Print Network (OSTI)

Williams, Compressed air energy storage: Theory, resources,for the compressed air energy storage technology by thefor compressed air energy storage power generation, Japan

Rutqvist, J.

2013-01-01T23:59:59.000Z

440

Modeling of coupled thermodynamic and geomechanical performance of underground compressed air energy storage (CAES) in lined rock caverns  

E-Print Network (OSTI)

Williams, Compressed air energy storage: Theory, resources,study for the compressed air energy storage technology byplant for compressed air energy storage power generation,

Rutqvist, J.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Porous media compressed air energy storage (PM-CAES): Theory and simulation of the coupled wellbore-reservoir system  

E-Print Network (OSTI)

of selected compressed air energy storage studes, Pacificaspects of compressed-air energy storage in aquifers, J. ofresources and compressed air energy storage (CAES), Energy,

Oldenburg, C.M.

2014-01-01T23:59:59.000Z

442

Characterizing excavation damaged zone and stability of pressurized lined rock caverns for underground compressed air energy storage  

E-Print Network (OSTI)

for Underground Compressed Air Energy Storage Hyung-Mok Kimperformance of compressed air energy storage (CAES) in linedcavern (LRC); Compressed air energy storage (CAES); TOUGH-

Kim, H.M.

2014-01-01T23:59:59.000Z

443

Trivial extensions of local rings and a conjecture of  

E-Print Network (OSTI)

Abstract. This paper partly settles a conjecture of Costa on (n,d)-rings, i.e., rings in which n-presented modules have projective dimension at most d. For this purpose, a theorem studies the transfer of the (n,d)-property to trivial extensions of local rings by their residue fields. It concludes with a brief discussion-backed by original examples- of the scopes and limits of our results. This project has been funded by King Fahd University of Petroleum & minerals under

S. Kabbaj; N. Mahdou

2003-01-01T23:59:59.000Z

444

Buckling behaviour of ring-stiffned cylinders; experimental study  

Science Journals Connector (OSTI)

The effect of the number and size of rings on the buckling strength of ring-stiffened cylinders is studied experimentally. The results of ten machined ring-stiffened cylinders subjected to lateral pressure are presented. Five of the cylinders failed by the general instability mode and the rest failed by the shell instability mode. A sample of the experimental results which shows longitudinal and circumferential strains as well as the development of the circularity contours till collapse is presented. Buckling pressures obtained from the experiments are shown to be within ±30% of the corresponding value obtained from the theoretical analysis available in the literature.

S.S. Seleim; J. Roorda

1986-01-01T23:59:59.000Z

445

Dynamic apeerture in damping rings with realistic wigglers  

SciTech Connect

The International Linear Collider based on superconducting RF cavities requires the damping rings to have extremely small equilibrium emittance, huge circumference, fast damping time, and large acceptance. To achieve all of these requirements is a very challenging task. In this paper, we will present a systematic approach to designing the damping rings using simple cells and non-interlaced sextupoles. The designs of the damping rings with various circumferences and shapes, including dogbone, are presented. To model realistic wigglers, we have developed a new hybrid symplectic integrator for faster and accurate evaluation of dynamic aperture of the lattices.

Cai, Yunhai; /SLAC

2005-05-04T23:59:59.000Z

446

PROGRESS IN DESIGNING A MUON COOLING RING WITH LITHIUM LENSES.  

SciTech Connect

We discuss particle tracking simulations in a storage ring with lithium lens inserts designed for the six-dimensional phase space cooling of muons by the ionization cooling. The ring design contains one or more lithium lens absorbers for transverse cooling that transmit the beam with very small beta-function values, in addition to liquid-hydrogen wedge-shaped absorbers in dispersive locations for longitudinal cooling. Such a ring could comprise the final component of a cooling system for use in a muon collider. The beam matching between dipole-quadrupole lattices and the lithium lenses is of particular interest.

FUKUI,Y.CLINE,D.B.GARREN,A.A.KIRK,H.G.

2004-03-03T23:59:59.000Z

447

Hall effect in a strong magnetic field: Direct comparisons of compressible magnetohydrodynamics and the reduced Hall magnetohydrodynamic equations  

SciTech Connect

In this work we numerically test a model of Hall magnetohydrodynamics in the presence of a strong mean magnetic field: the reduced Hall magnetohydrodynamic model (RHMHD) derived by [Gomez et al., Phys. Plasmas 15, 102303 (2008)] with the addition of weak compressible effects. The main advantage of this model lies in the reduction of computational cost. Nevertheless, up until now the degree of agreement with the original Hall MHD system and the range of validity in a regime of turbulence were not established. In this work direct numerical simulations of three-dimensional Hall MHD turbulence in the presence of a strong mean magnetic field are compared with simulations of the weak compressible RHMHD model. The results show that the degree of agreement is very high (when the different assumptions of RHMHD, such as spectral anisotropy, are satisfied). Nevertheless, when the initial conditions are isotropic but the mean magnetic field is maintained strong, the results differ at the beginning but asymptotically reach a good agreement at relatively short times. We also found evidence that the compressibility still plays a role in the dynamics of these systems, and the weak compressible RHMHD model is able to capture these effects. In conclusion the weak compressible RHMHD model is a valid approximation of the Hall MHD turbulence in the relevant physical context.

Martin, L. N.; Dmitruk, P. [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (Argentina) and IFIBA, CONICET, Ciudad Universitaria, 1428 Buenos Aires (Argentina); Gomez, D. O. [Departamento de Fisica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires (Argentina) and IFIBA, CONICET, Ciudad Universitaria, 1428 Buenos Aires (Argentina); Instituto de Astronomia y Fisica del Espacio, Ciudad Universitaria, 1428 Buenos Aires (Argentina)

2010-11-15T23:59:59.000Z

448

ENG 4793: Composite Materials and Processes 1 Compression Molding  

E-Print Network (OSTI)

1 ENG 4793: Composite Materials and Processes 1 Compression Molding ver 2 ENG 4793: Composite Materials and Processes 2 ENG 4793: Composite Materials and Processes 3 ENG 4793: Composite Materials and Processes 4 Schematic of a Compression Molding Press ENG 4793: Composite Materials and Processes 5 Matched

Colton, Jonathan S.

449

Circle criterion observer for a compression system Bjrnar Bhagen  

E-Print Network (OSTI)

.gravdahl@itk.ntnu.no Abstract-- Observers for a compression system using turbo compressors are derived for a model that captures speed. Results are validated by simulations. I. MOTIVATION Compression systems using turbo compressors, centrifugal or axial, are exposed to the phenomenons of surge and rotating stall. Surge is an axisymmtrical

Gravdahl, Jan Tommy

450

Compressed Gas Cylinder Safety I. Background. Due to the nature  

E-Print Network (OSTI)

Compressed Gas Cylinder Safety I. Background. Due to the nature of gas cylinders hazards of a ruptured cylinder. There are almost 200 different types of materials in gas cylinders, there are several general procedures to follow for safe storage and handling of a compressed gas cylinder: II

Suzuki, Masatsugu

451

Improving Compressed Air System Efficiency- Know What You Really Need  

E-Print Network (OSTI)

demand-side management (DSM) programs as well as their own efforts, Wisconsin Power and Light customers have been able to improve compressed air system efficiency over the past few years. One customer reduced compressed air operating costs by one third...

Terrell, R. E.

452

Trees, Windows and Tiles for Wavelet Image Compression  

E-Print Network (OSTI)

the local statistics to estimate the best probability assignment for the current coefficient the task of compressing an image by using different probability models for compressing different regions of the image. In an earlier paper, we intro- duced a class of probability models for images, the k

Lee, Wee Sun

453

Trees, Windows and Tiles for Wavelet Image Compression  

E-Print Network (OSTI)

methods which use the local statistics to estimate the best probability assignment for the current the task of compressing an image by using different probability models for compressing different regions of the image. In an earlier paper, we intro­ duced a class of probability models for images, the k

Lee, Wee Sun

454

Redundancy Control in Large Scale Sensor Networks via Compressive Sensing  

E-Print Network (OSTI)

, China. The authors deployed 100 sensor nodes and 1096 relay nodes to monitor the urban CO2 in a 5000(mRedundancy Control in Large Scale Sensor Networks via Compressive Sensing Liwen Xu1 , Yongcai Wang1, and require high data storage and management costs. To deal with these challenges, compressive sensing (CS

Wang, Yongcai

455

Techno-economic Performance Evaluation of Compressed Air  

E-Print Network (OSTI)

PNNL-22235 Techno-economic Performance Evaluation of Compressed Air Energy Storage in the Pacific of Compressed Air Energy Storage in the Pacific Northwest BP McGrail JE Cabe CL Davidson FS Knudsen DH Bacon MD air energy storage (CAES) in the unique geologic setting of inland Washington and Oregon. The basic

456

Assessment of the Market for Compressed Air Efficiency Services  

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

The objective of this report is to provide a comprehensive and balanced view of the market for engineering and consulting services to improve the energy efficiency of plant compressed air systems. The report is intended for use by industrial energy efficiency program operators in developing strategies to encourage the growth of compressed air system efficiency and enhance the quality of the services it offers.

457

AUDIO COMPRESSION EXPLOITING REPETITION (ACER): CHALLENGES AND SOLUTIONS  

E-Print Network (OSTI)

AUDIO COMPRESSION EXPLOITING REPETITION (ACER): CHALLENGES AND SOLUTIONS Stuart Cunningham and Vic of the development of an innovative audio compression system, designed to exploit repetition sequences in audio, and particularly, music. The paper briefly introduces and describes how musical content and structure within audio

Davies, John N.

458

New Regenerative Cycle for Vapor Compression Refrigeration  

Office of Scientific and Technical Information (OSTI)

SCIENTIFIC REPORT SCIENTIFIC REPORT Title Page Project Title: New Regenerative Cycle for Vapor Compression Refrigeration DOE Award Number: DE-FG36-04GO14327 Document Title: Final Scientific Report Period Covered by Report: September 30, 2004 to September 30, 2005 Name and Address of Recipient Organization: Magnetic Development, Inc., 68 Winterhill Road, Madison, CT 06443, phone: 203-214-7247, fax: 203-421-7948, e-mail: mjb1000@aol.com Contact Information: Mark J. Bergander, Ph.D., P.E., Principal Investigator, phone: 203-214-7247, fax: 203-421-7948, e-mail: mjb1000@aol.com Project Objective (as stated in the proposal): The main objective of this project is to confirm on a well-instrumented prototype the theoretically derived claims of higher efficiency and coefficient

459

SEED BANKS FOR MAGNETIC FLUX COMPRESSION GENERATORS  

SciTech Connect

In recent years the Lawrence Livermore National Laboratory (LLNL) has been conducting experiments that require pulsed high currents to be delivered into inductive loads. The loads fall into two categories (1) pulsed high field magnets and (2) the input stage of Magnetic Flux Compression Generators (MFCG). Three capacitor banks of increasing energy storage and controls sophistication have been designed and constructed to drive these loads. One bank was developed for the magnet driving application (20kV {approx} 30kJ maximum stored energy.) Two banks where constructed as MFCG seed banks (12kV {approx} 43kJ and 26kV {approx} 450kJ). This paper will describe the design of each bank including switching, controls, circuit protection and safety.

Fulkerson, E S

2008-05-14T23:59:59.000Z

460

Quantum Bootstrapping via Compressed Quantum Hamiltonian Learning  

E-Print Network (OSTI)

Recent work has shown that quantum simulation is a valuable tool for learning empirical models for quantum systems. We build upon these results by showing that a small quantum simulators can be used to characterize and learn control models for larger devices for wide classes of physically realistic Hamiltonians. This leads to a new application for small quantum computers: characterizing and controlling larger quantum computers. Our protocol achieves this by using Bayesian inference in concert with Lieb-Robinson bounds and interactive quantum learning methods to achieve compressed simulations for characterization. Whereas Fisher information analysis shows that current methods which employ short-time evolution are suboptimal, interactive quantum learning allows us to overcome this limitation. We illustrate the efficiency of our bootstrapping protocol by showing numerically that an 8-qubit Ising model simulator can be used to calibrate and control a 50 qubit Ising simulator while using only about 750 kilobits of experimental data.

Nathan Wiebe; Christopher Granade; David G. Cory

2014-09-04T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

Information compression for remote readable ID tags  

Science Journals Connector (OSTI)

Optical identity (ID) tags have been introduced and described to achieve remote target recognition and identification. Optical ID tags usually contain encrypted signatures to be read out, decrypted and verified. In this paper, new features are introduced so that ID tags can be reliably used for remote detection and verification even if the captured tag is extremely degraded by perspective or optical distortion. Optimization of the ID tag size as well as the number of bits required to display the complex-amplitude information are analysed and discussed. The highest compression of grey levels, which corresponds to binary ID tags, is studied. Decryption and verification results are provided to analyse the possibilities of the newly designed optical ID tags.

Sergi Horrillo; Elisabet Pérez-Cabré; María S Millán

2010-01-01T23:59:59.000Z

462

Seneca Compressed Air Energy Storage (CAES) Project  

SciTech Connect

This report provides a review and an analysis of potential environmental justice areas that could be affected by the New York State Electric & Gas (NYSEG) compress air energy storage (CAES) project and identifies existing environmental burden conditions on the area and evaluates additional burden of any significant adverse environmental impact. The review assesses the socioeconomic and demographic conditions of the area surrounding the proposed CAES facility in Schuyler County, New York. Schuyler County is one of 62 counties in New York. Schuyler County’s 2010 population of 18,343 makes it one of the least populated counties in the State (U.S. Census Bureau, 2010). This report was prepared for WorleyParsons by ERM and describes the study area investigated, methods and criteria used to evaluate this area, and the findings and conclusions from the evaluation.

None

2012-11-30T23:59:59.000Z

463

DEVELOPMENT AND TESTING OF A PRE-PROTOTYPE RAMGEN ENGINE  

SciTech Connect

The research and development effort of a new kind of compressor and engine is presented. The superior performance of these two products arises from the superior performance of rotating supersonic shock-wave compression. Several tasks were performed in compliance with the DOE award objectives. A High Risk Technology review was conducted and evaluated by a team of 20 senior engineers and scientists representing various branches of the federal government. The conceptual design of a compression test rig, test rotors, and test cell adaptor was completed. The work conducted lays the foundation for the completed design and testing of the compression test rig, and the design of a supersonic shock-wave compressor matched to a conventional combustor and turbine.

Aaron Koopman

2003-07-01T23:59:59.000Z

464

Hybrid Vapor Compression Adsorption System: Thermal Storage Using Hybrid Vapor Compression Adsorption System  

SciTech Connect

HEATS Project: UTRC is developing a new climate-control system for EVs that uses a hybrid vapor compression adsorption system with thermal energy storage. The targeted, closed system will use energy during the battery-charging step to recharge the thermal storage, and it will use minimal power to provide cooling or heating to the cabin during a drive cycle. The team will use a unique approach of absorbing a refrigerant on a metal salt, which will create a lightweight, high-energy-density refrigerant. This unique working pair can operate indefinitely as a traditional vapor compression heat pump using electrical energy, if desired. The project will deliver a hot-and-cold battery that provides comfort to the passengers using minimal power, substantially extending the driving range of EVs.

None

2012-01-04T23:59:59.000Z

465

Compressive Passive Millimeter-Wave Imager (Flash format)  

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

Compressive Passive Millimeter-Wave Imager > (Flash) Compressive Passive Millimeter-Wave Imager > (Flash) Multimedia Nuclear Systems Analysis Engineering Analysis Nonproliferation and National Security Detection & Diagnostic Systems Compressive Passive Millimeter-Wave Imager VIDEO TRANSCRIPT Remote Vital Sign Monitoring System Preventing the Worst (by CNN) Engineering Development & Applications Argonne's Nuclear Science & Technology Legacy Other Multimedia Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Detection & Diagnostic Systems - Multimedia Bookmark and Share Compressive Passive Millimeter-Wave Imager Argonne National Laboratory Read full story Argonne has developed a passive compressive sensing system that uses millimeter waves (MMWs) to rapidly image targets with high resolution and

466

Compressed Air Energy Storage (CAES) | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Compressed Air Energy Storage (CAES) Jump to: navigation, search Contents 1 Introduction 2 Technology Description 3 Plants 4 References Introduction Compressed air energy storage (CAES) is a way to store energy that is generated at night and deliver the energy during the day to meet peak demand. This is performed by compressing air and storing it during periods of excess electricity and expanding the air through a turbine when electricity is needed. Technology Description Diabatic Diabatic compressed air energy storage is what the two existing compressed air energy storage facilities currently employ. This method is

467

Utilization of CO2 as cushion gas for porous media compressed air energy storage  

E-Print Network (OSTI)

design of compressed air energy storage electric powerS and Williams RH, Compressed Air Energy Storage: Theory,Porous media compressed air energy storage (PM-CAES): theory

Oldenburg, C.M.

2014-01-01T23:59:59.000Z

468

Ring Cycle for Dilating and Constricting the Nuclear Pore  

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

Ring Cycle for Dilating and Ring Cycle for Dilating and Constricting the Nuclear Pore Ring Cycle for Dilating and Constricting the Nuclear Pore Print Thursday, 13 June 2013 09:30 Pictured is an illustration of several nuclear pore complexes (NPCs) embedded in a cell nucleus. NPCs act as gatekeepers between a cell's cytoplasm and its nucleus. Based on crystallographic analyses, Sozanne R. Solmaz et al. uncover the molecular mechanism that underlies the large changes in diameter of NPCs and suggest a "ring cycle" mechanism for dilating and constricting the central NPC channel. The model could explain the ability of NPCs to accommodate transport substrates of a large size range and rapidly adjust to cellular transport needs. Read the full article. (Image courtesy of Sozanne R. Solmaz, Günter Blobel, and Ivo Melčák.)

469

Frequency stabilization for a 486nm dye-ring laser  

E-Print Network (OSTI)

For my thesis, I worked towards using two reference cavities to provide frequency stabilization to a 486nm dye-ring laser. After a doubling cavity doubles the frequency to 243nm, the laser beam is used to excite ground ...

Sievers, Charles A. (Charles Anders), 1979-

2004-01-01T23:59:59.000Z

470

Use of gradient magnets in low emittance electron storage rings  

SciTech Connect

The use of gradient magnets for a low emittance electron storage ring is discussed and a magnetic lattice for a 6 GeV electron energy synchrotron radiation source adopting this feature is presented.

Vignola, G.

1985-01-01T23:59:59.000Z

471

Collective effects in a diffraction-limited storage ring  

Science Journals Connector (OSTI)

An overview of beam collective effects in diffraction-limited storage rings is given. The relation of a very low emittance machine and its stored beam to the former is described.

Nagaoka, R.

2014-08-27T23:59:59.000Z

472

Graphene Layer Growth Chemistry: Five-Six-Ring Flip Reaction  

E-Print Network (OSTI)

are incorporated into growing graphene layers and hence willGRAPHENE LAYER GROWTH CHEMISTRY: FIVE-SIX-RING FLIP REACTIONon the zigzag edge of a graphene layer. A new reaction

Whitesides, R.; Domin, D.; Salomon-Ferrer, R.; Lester Jr., W.A.; Frenklach, M.

2008-01-01T23:59:59.000Z

473

Ring Involutions and Self-Dual Codes Jay A. Wood  

E-Print Network (OSTI)

Ring Involutions and Self-Dual Codes Jay A. Wood Department of Mathematics Western Michigan University jay.wood@wmich.edu AMS meeting, Lexington, Kentucky March 27, 2010 #12;Acknowledgments Much

Wood, Jay

474

Characters and finite Frobenius rings Jay A. Wood  

E-Print Network (OSTI)

Characters and finite Frobenius rings Jay A. Wood Department of Mathematics Western Michigan-modules; 3. R = R as right R-modules. Due independently to Hirano, 1997, and Wood, 1999. JW (WMU) Frobenius

Wood, Jay

475

Photoswitchable Molecular Rings for Solar-Thermal Energy Storage  

Science Journals Connector (OSTI)

Photoswitchable Molecular Rings for Solar-Thermal Energy Storage ... Ground-state energy barriers along the NN torsional coordinates were also computed, along with excitation energies and intensities for the species that can contribute to the photostationary state. ...

E. Durgun; Jeffrey C. Grossman

2013-03-04T23:59:59.000Z

476

Fermilab Muon Ring Arrives to a Large Crowd of Fans  

SciTech Connect

A very large group of people gathered to watch the muon g-2 ring on its last leg of the big move from Brookhaven National Laboratory in Long Island, NY to Fermilab in Batavia, IL.

None

2013-08-15T23:59:59.000Z

477

Power Series Over Noetherian Rings February 4, 2013 William ...  

E-Print Network (OSTI)

Feb 4, 2013 ... ian rings and of the induced spectral maps associated with various ...... algebraic independence of ?1 over R, we have ht( ?P ?R1) = 1, and so ...

2013-02-04T23:59:59.000Z

478

A Shallow Attenuating Anomaly Inside The Ring Fracture Of The...  

Open Energy Info (EERE)

Shallow Attenuating Anomaly Inside The Ring Fracture Of The Valles Caldera, New Mexico Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: A Shallow...

479

Coherence and destruction of coherence in mesoscopic rings  

Science Journals Connector (OSTI)

Recent investigations have shown that an important contribution to the magnetic response of an ensemble of mesoscopic normal metal rings at low temperatures is given by the coherent backscattering familiar fro...

Ulrich Eckern

1991-01-01T23:59:59.000Z

480

Injection and Extraction Lines for the ILC Damping Rings  

E-Print Network (OSTI)

INJECTION AND EXTRACTION LINES FOR THE ILC DAMPING RINGS ?the injection and extraction lines into and out of the ILCas the design for the abort line. Due to changes of the geo-

Reichel, Ina

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ring compression testing" 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

TIGHT CLOSURE IN GRADED RINGS Karen E. Smith \\Lambda  

E-Print Network (OSTI)

TIGHT CLOSURE IN GRADED RINGS Karen E. Smith \\Lambda Abstract. This paper facilitates is supported by the U.S. National Science Foundation. Typeset by A M S­T E X 1 #12; 2 KAREN E. SMITH \\Lambda

Smith, Karen E.

482

Suppression of ring artefacts when tomographing anisotropically attenuating samples  

Science Journals Connector (OSTI)

An intensity normalization technique is proposed to suppress ring artefacts of varying strength. The method was applied to an elongated sample in a monochromatic beam and to a sample with highly attenuated parts in a white beam.

Titarenko, S.

2011-04-02T23:59:59.000Z

483

Triangularly phase-modulated optical fiber ring resonator sensor  

Science Journals Connector (OSTI)

An optical fiber ring resonatory sensor system has been demonstrated by applying a triangular phase modulation signal to a fiber loop. The dynamic range for detection of optical phase...

Chien, Pie-Yau; Pan, Ci-Ling

1992-01-01T23:59:59.000Z

484

Hydrogen ICE Vehicle Testing Activities  

SciTech Connect

The Advanced Vehicle Testing Activity teamed with Electric Transportation Applications and Arizona Public Service to develop and monitor the operations of the APS Alternative Fuel (Hydrogen) Pilot Plant. The Pilot Plant provides 100% hydrogen, and hydrogen and compressed natural gas (H/CNG)-blended fuels for the evaluation of hydrogen and H/CNG internal combustion engine (ICE) vehicles in controlled and fleet testing environments. Since June 2002, twenty hydrogen and H/CNG vehicles have accumulated 300,000 test miles and 5,700 fueling events. The AVTA is part of the Department of Energy’s FreedomCAR and Vehicle Technologies Program. These testing activities are managed by the Idaho National Laboratory. This paper discusses the Pilot Plant design and monitoring, and hydrogen ICE vehicle testing methods and results.

J. Francfort; D. Karner

2006-04-01T23:59:59.000Z

485

Resonance tuning of piezoelectric vibration energy scavenging generators using compressive  

Science Journals Connector (OSTI)

Vibration energy scavenging, harvesting ambient vibrations in structures for conversion into usable electricity, provides a potential power source for emerging technologies including wireless sensor networks. Most vibration energy scavenging devices developed to date operate effectively at a single specific frequency dictated by the device's design. However, for this technology to be commercially viable, vibration energy scavengers that generate usable power across a range of driving frequencies must be developed. This paper details the design and testing of a tunable-resonance vibration energy scavenger which uses the novel approach of axially compressing a piezoelectric bimorph to lower its resonance frequency. It was determined that an axial preload can adjust the resonance frequency of a simply supported bimorph to 24% below its unloaded resonance frequency. The power output to a resistive load was found to be 65–90% of the nominal value at frequencies 19–24% below the unloaded resonance frequency. Prototypes were developed that produced 300–400 µW of power at driving frequencies between 200 and 250 Hz. Additionally, piezoelectric coupling coefficient values were increased using this method, with keff values rising as much as 25% from 0.37 to 0.46. Device damping increased 67% under preload, from 0.0265 to 0.0445, adversely affecting the power output at lower frequencies. A theoretical model modified to include the effects of preload on damping predicted power output to within 0–30% of values obtained experimentally. Optimal load resistance deviated significantly from theory, and merits further investigation.

Eli S Leland; Paul K Wright

2006-01-01T23:59:59.000Z

486

Instability issues for the ESS linac and rings  

SciTech Connect

Comments are made on beam instability issues in the ESS linac and rings. The topics of interest in the linac are halo generation in the absence and presence of machine imperfections, and also the stability of the momentum ramping of the output beam. In the case of the rings, the main concern is for fast coherent transverse instabilities due to the combined effect of coupled electron-proton oscillations and interaction with the wall impedances.

Rees, G. H. [Rutherford Appleton Laboratory, CLRC (United Kingdom)

1999-12-03T23:59:59.000Z

487

Laser plasma focus produced in a ring target  

Science Journals Connector (OSTI)

A new geometry for generating a laser?produced plasma is presented. A toroidalmirror is used to focus a CO2laser beam on the inside wall of a copper ring target. The plasma produced converges at the center of the ring where an axial plasma focus is formed. High?speed photography shows details of a plasma generated at a distance from the target surface. This new geometry could have important applications in the field of x?ray lasers.

G. Saint?Hilaire; Z. Szili

1976-01-01T23:59:59.000Z

488

Flame–vortex interaction in a reacting vortex ring  

Science Journals Connector (OSTI)

Direct numerical simulations are used to study the flame–vortex interaction in a laminar reacting vortex ring. The chemical reaction occurs by a one-step Arrhenius-type reaction that mimics the combustion of typical hydrocarbon and air. The ring is generated by an axisymmetric jet that is impulsed to emit a cold fuel through a nozzle. The fuel enters a quiescent ambient at a much higher temperature. By adjusting the ratio of the ambient and fuel temperatures the ignition either occurs during the formation or post-formation phase of the ring. When ignition occurs during the formation phase of the ring the bulk of combustion is by a flame at the front of the vortex bubble. When ignition is delayed until after the formation phase most of the reaction occurs inside the vortex ring. It is found that premixing the fuel and the oxidizer enhances the amount of product formation. The heat released from the reaction significantly affects production redistribution and diffusion of the vorticity throughout the field. The results of the simulations also reveal that the heat of reaction affects the strain rate fields differently depending on when the ignition of the ring occurs.

J. S. Hewett; C. K. Madnia

1998-01-01T23:59:59.000Z

489

Dual-etalon cavity ring-down frequency-comb spectroscopy with broad band light source  

DOE Patents (OSTI)

In an embodiment, a dual-etalon cavity-ring-down frequency-comb spectrometer system is described. A broad band light source is split into two beams. One beam travels through a first etalon and a sample under test, while the other beam travels through a second etalon, and the two beams are recombined onto a single detector. If the free spectral ranges ("FSR") of the two etalons are not identical, the interference pattern at the detector will consist of a series of beat frequencies. By monitoring these beat frequencies, optical frequencies where light is absorbed may be determined.

Chandler, David W; Strecker, Kevin E

2014-04-01T23:59:59.000Z

490

A Cavity Ring-Down Spectroscopy Mercury Continuous Emission Monitor  

SciTech Connect

The Sensor Research & Development Corporation (SRD) has undertaken the development of a Continuous Emissions Monitor (CEM) for mercury based on the technique of Cavity Ring-Down Spectroscopy (CRD). The project involved building an instrument for the detection of trace levels of mercury in the flue gas emissions from coal-fired power plants. The project has occurred over two phases. The first phase concentrated on the development of the ringdown cavity and the actual detection of mercury. The second phase dealt with the construction and integration of the sampling system, used to carry the sample from the flue stack to the CRD cavity, into the overall CRD instrument. The project incorporated a Pulsed Alexandrite Laser (PAL) system from Light Age Incorporated as the source to produce the desired narrow band 254 nm ultra-violet (UV) radiation. This laser system was seeded with a diode laser to bring the linewidth of the output beam from about 150 GHz to less than 60 MHz for the fundamental beam. Through a variety of non-linear optics the 761 nm fundamental beam is converted into the 254 nm beam needed for mercury detection. Detection of the mercury transition was verified by the identification of the characteristic natural isotopic structure observed at lower cavity pressures. The five characteristic peaks, due to both natural isotopic abundance and hyperfine splitting, provided a unique identifier for mercury. SRD scientists were able to detect mercury in air down below 10 parts-per-trillion by volume (pptr). This value is dependent on the pressure and temperature within the CRD cavity at the time of detection. Sulfur dioxide (SO{sub 2}) absorbs UV radiation in the same spectral region as mercury, which is a significant problem for most mercury detection equipment. However, SRD has not only been able to determine accurate mercury concentrations in the presence of SO{sub 2}, but the CRD instrument can in fact determine the SO{sub 2} concentration as well. Detection of mercury down to the low hundreds of pptr has been accomplished in the presence of SO{sub 2} at concentration levels much higher than that found in typical flue gas emissions. SRD scientists extended the interferent testing to each individual component found in flue gas. It was found that only SO{sub 2} had a significant effect on the ring-down decay curve. Upon completion of testing the components of flue gas individually a simulated flue gas stream was used to test to the CRD instrument. The result showed accurate detection of mercury down to levels below 100 pptr in a simulated flue gas stream with the concentrations of the various components above that found in a typical untreated flue gas. A sampling system was designed and integrated into the CRD instrument to carry the sample from the flue gas stack to the CRD cavity. The sampling system was constructed so that it could be placed very close to the sampling port. SRD scientists were able to couple the UV laser light into an optical fiber, which is then sent to the sampling system. This allows the laser system to be isolated from the sampling system. Initial long-term testing revealed a couple of problems related to the stability of the output frequency of the laser system. These problems have been successfully dealt with by incorporating specific software solutions into the overall data acquisition program. The project culminated in a field test conducted at the DOE/NETL pilot plant facility in Pittsburgh, Pennsylvania. The object of the test was the evaluation of a cavity ringdown spectrometer constructed for the detection of TOTAL vapor phase mercury as a continuous emission monitor (CEM). Although there is the potential for the instrument to determine the amount of speciation between neutral elemental mercury (Hg{sup (o)}) and oxidized mercury (Hg{sup (+2)}), the initial test plan was to concentrate on the measurement of the total mercury. Another added benefit is that the measurements will report the sulfur dioxide (SO 2) concentration throughout the test. This report concludes the technical work asso

Christopher C. Carter

2004-12-15T23:59:59.000Z

491

Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed...  

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

Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed Natural Gas (CNG)-Powered Vehicles Lung Toxicity and Mutagenicity of Emissions From Heavy-Duty Compressed...

492

Effect of Compression Ratio and Piston Geometry on RCCI load limit  

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

Explores the effect of compression ratio and piston design on the practical load range of bio-fueled Reactivity Controlled Compression Ignition (RCCI) combustion.

493

E-Print Network 3.0 - acute compression fracture Sample Search...  

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

compression fracture Search Powered by Explorit Topic List Advanced Search Sample search results for: acute compression fracture Page: << < 1 2 3 4 5 > >> 1 1. RESERVOIR...

494

Neutralized Drift Compression Experiment (NDCX) - II Quarterly Report  

SciTech Connect

LBNL has received American Recovery and Reinvestment Act (ARRA) funding to construct a new accelerator at Lawrence Berkeley National Laboratory (LBNL) to significantly increase the energy on target, which will allow both the Heavy Ion Fusion (HIF) and Warm Dense Matter (WDM) research communities to explore scientific conditions that have not been available in any other device. For NDCX-II, a new induction linear accelerator (linac) will be constructed at Lawrence Berkeley National Laboratory (LBNL). NDCX-II will produce nano-second long ion beam bunches to hit thin foil targets. The final kinetic energy of the ions arriving at the target varies according to the ion mass. For atomic mass unit of 6 or 7 (Lithium ions), useful kinetic energies range from 1.5 to 5 or more MeV. The expected beam charge in the 1 ns (or shorter) pulse is about 20 nanoCoulombs. The pulse repetition rate will be about once or twice per minute (of course, target considerations will often reduce this rate). Our approach to building the NDCX-II ion accelerator is to make use of the available induction modules and 200 kV pulsers from the retired ATA electron linac at LLNL. Reusing this hardware will maximize the ion energy on target at a minimum cost. Some modification of the cells (e.g., reduce the bore diameter and replace with higher field pulsed solenoids) are needed in order to meet the requirements of this project. The NDCX-II project will include the following tasks: (1) Physics design to determine the required ion current density at the ion source, the injector beam optics, the layout of accelerator cells along the beam line, the voltage waveforms for beam acceleration and compression, the solenoid focusing, the neutralized drift compression and the final focus on target; (2) Engineering design and fabrication of the accelerator components, pulsed power system, diagnostic system, and control and data acquisition system; (3) Conventional facilities; and (4) Installation and integration. The project will be considered completed when the accelerator and pulsed power systems are in place and tested, and we begin beam production and acceleration. The period of performance for this project is July 7, 2009 to Mar 31, 2012, and the total funding, including contingency, is $11.0 M.

Kwan, J.W.

2009-10-01T23:59:59.000Z

495

A New Phenomenon of Compressive Strain Recovery in Gelatin-silica Aerogel Composites with SDS  

Science Journals Connector (OSTI)

Abstract Silica aerogels are nano-structured, highly porous solids with extremely low density but fragile and brittleness. To enhance the applicability of aeorgels, gelatin-silica aerogel (GSA) composite blocks were produced by mixing the hydrophobic aerogel-granules in a gelatin-SDS (sodium dodecyl sulfate) foamed-solution by frothing method. Gelatin essentially acts as binder whereas SDS enhances the foaming capacity of the mixture to the overall binding of the aerogels. The characteristics of these blocks depend on fabrication process and the gelatin-SDS composition. Especially, the strain recovery exhibited after compression is an unusual phenomenon observed with brittle silica aerogels. This paper discusses the effects of SDS on the density and the strain recovery of GSA composites. The fabrication process is explained; compression testing of these blocks is presented and associated strain recovery observed upon unloading is studied. The process variables such amount of gelatin/aerogel/SDS mix; compressive strain; and strain rates were analysed through Analysis of Variance (ANOVA). An empirical model that relates these variables to achieve the optimal strain recovery is established. In addition, the rule of mixture model with a correction factor was developed to estimate the densities of GSA-SDS composites. These composites can be used for heat protection, sound barrier, impact-resistance and shock-absorption.

Mahesh Sachithanadam; Sunil Chandrakanth Joshi

2014-01-01T23:59:59.000Z

496

E-Print Network 3.0 - apophyseal ring fracture Sample Search...  

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

fracture Search Powered by Explorit Topic List Advanced Search Sample search results for: apophyseal ring fracture...

497

Portable and Transparent Message Compression in MPI Libraries to Improve the Performance and Scalability of Parallel Applications  

SciTech Connect

The goal of this project has been to develop a lossless compression algorithm for message-passing libraries that can accelerate HPC systems by reducing the communication time. Because both compression and decompression have to be performed in software in real time, the algorithm has to be extremely fast while still delivering a good compression ratio. During the first half of this project, they designed a new compression algorithm called FPC for scientific double-precision data, made the source code available on the web, and published two papers describing its operation, the first in the proceedings of the Data Compression Conference and the second in the IEEE Transactions on Computers. At comparable average compression ratios, this algorithm compresses and decompresses 10 to 100 times faster than BZIP2, DFCM, FSD, GZIP, and PLMI on the three architectures tested. With prediction tables that fit into the CPU's L1 data acache, FPC delivers a guaranteed throughput of six gigabits per second on a 1.6 GHz Itanium 2 system. The C source code and documentation of FPC are posted on-line and have already been downloaded hundreds of times. To evaluate FPC, they gathered 13 real-world scientific datasets from around the globe, including satellite data, crash-simulation data, and messages from HPC systems. Based on the large number of requests they received, they also made these datasets available to the community (with permission of the original sources). While FPC represents a great step forward, it soon became clear that its throughput was too slow for the emerging 10 gigabits per second networks. Hence, no speedup can be gained by including this algorithm in an MPI library. They therefore changed the aim of the second half of the project. Instead of implementing FPC in an MPI library, they refocused their efforts to develop a parallel compression algorithm to further boost the throughput. After all, all modern high-end microprocessors contain multiple CPUs on a single die and will undoubtedly contain even larger numbers of CPUs in the future. Hence, a compute node in a parallel system is likely to have multiple processors per interconnection link. Thus, they investigated how to best exploit multiple CPUs to compress and decompress data for a single link, i.e., they developed a parallel version of the FPC algorithm called pFPC. On a 4-core 3 GHz Xeon system, pFPC exceeds 10 gigabits per second both in compression and decompression throughput while still reaching a compression ratio of 18%, which is reasonable for their double-precision floating-point datasets. At half this throughput, it achieves a 41% compression ratio. Moreover, the algorithm scales well to four cores and promises even higher throughputs on larger machines. Additional results and a description of the pFPC algorithm have recently been published in the proceedings of the Data Compression Conference. The C source code of pFPC is also publicly available.

David Albonesi; Martin Burtscher

2009-04-17T23:59:59.000Z

498

Final results of the Boeing and Los Alamos grazing incidence ring-resonator free electron laser experiment  

Science Journals Connector (OSTI)

Initial test results for the Boeing and Los Alamos grazing incidence ring-resonator FEL were presented at the 1990 FEL Conference. This work showed that the resonator pointing alignment accurcy required improvements to the resonator diagnostics to increase the alignment accuracy. The alignment technique was described, but lasing results with the more accurate alignment were not available at that time. This paper discusses more recent and final test results from the grazing-incidence ring-resonator experiment. With the new alignment techniques, the extraction was approximately seven times greater, and the FEL output exhibited much reduced temporal structure. Measurements show that FEL output and wavelength are sensitive to electron beam energy variations.

D.H. Dowell; M.L. Laucks; A.R. Lowrey; J. Adamski; D. Pistoresi; D.R. Shoffstall; A.H. Lumpkin; S. Bender; D. Byrd; R.L. Tokar; K. Sun; M. Bentz; R. Burns; J. Guha; W. Tomita

1992-01-01T23:59:59.000Z

499

The Distribution of Dark Matter in a Ringed Galaxy  

E-Print Network (OSTI)

Outer rings are located at the greatest distance from the galaxy center of any feature resonant with a bar. Because of their large scale, their morphology is sensitive to the distribution of the dark matter in the galaxy. We introduce here how study of these rings can constrain the mass-to-light ratio of the bar, and so the percentage of dark matter in the center of these galaxies. We compare periodic orbits integrated in the ringed galaxy NGC 6782 near the outer Lindblad resonance to the shape of the outer ring. The non-axisymmetric component of the potential resulting from the bar is derived from a near-infrared image of the galaxy. The axisymmetric component is derived assuming a flat rotation curve. We find that the pinched non-self-intersecting periodic orbits are more elongated for higher bar mass-to-light ratios and faster bars. The inferred mass-to-light ratio of the bar depends on the assumed inclination of the galaxy. With an assumed galaxy inclination of i=41 degrees, for the orbits to be consistent with the observed ring morphology the mass-to-light ratio of the bar must be high, greater than 70% of a maximal disk value. For i=45 degrees, the mass-to-light ratio of the bar is $75\\pm 15%$ of the maximal disk value. Since the velocity field of these rings can be used to constrain the galaxy inclination as well as which periodic orbit is represented in the ring, further study will yield tighter constraints on the mass-to-light ratio of the bar. If a near maximal disk value for the bar is required, then either there would be little dark matter within the bar, or the dark matter contained in the disk of the galaxy would be non-axisymmetric and would rotate with the bar.

A. C. Quillen; J. A. Frogel

1996-09-05T23:59:59.000Z

500

Matrix-Based Test Vector Decompression Using an Embedded Processor  

E-Print Network (OSTI)

-based operations that significantly reduce the amount of test data that needs to be stored on the tester on lossless compression codes have been proposed in the literature for reducing the test volume. The Burrows. In Proceedings of the 17th IEEE International Symposium on Defect and Fault Tolerance in VLSI Systems (DFT'02

Touba, Nur A.