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Note: This page contains sample records for the topic "4-valve dual overhead" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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1

Development and modification of a single overhead camshaft 4-valve 4-stroke 135 cc formula varsity race car engine  

Science Journals Connector (OSTI)

The engine that was chosen to be developed and modified is Yamaha LC 135 Single Overhead Camshaft (SOHC) 4-valve 4-stroke 135cc liquid-cooled engine. The engine selection is based on the specification, rule and regulation in UTeM Formula Varsity 2012 (FV 2012). The engine performance is determined by engine operating characteristics. The engine air flow affects the filtration, intake and exhaust systems. The heat from the engine rejected to the surrounding through the active cooling system which has radiator and fan. The selection of the engine is based on weighted decision matrix which consists of reliability, operating and maintenance cost, fuel consumption and weight. The score of the matrix is formulated based on relative weighted factor among the selections. It been compared between Yamaha LC 135 Single Overhead Camshaft (SOHC) 4-valve 4-stroke 135cc liquid-cooled engine, Honda Wave 125 X Air Cooled, 4 Cycle Engine Overhead Camshaft (OHC) and Suzuki Shogun RR 4 stroke air cooled Single Overhead Camshaft (SOHC). The modification is applied to the engine through the simulation and tuning of Capacitor Discharge Ignition (CDI).

M A Abdullah; N Tamaldin; H Rusnandi; T Manoharan; M A Samsir

2013-01-01T23:59:59.000Z

2

SMB Host Processor Overhead  

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

SMB SMB SMB Description There are two benchmarks included here. The msg_rate test measures the sustained MPI message rate using a communication pattern found in many real applications. For a complete explanation of the routine refer to http://www.cs.sandia.gov/smb/msgrate.html. The mpi_overhead test uses a post-work-wait method using MPI non-blocking send and receive calls to measure the user level overhead of the respective MPI calls. For a complete explanation of the routine refer to http://www.cs.sandia.gov/smb/overhead.html. Download SMB tar file How to Build The source files are in the src directory, in smb_1.0-1/src/mpi_overhead and smb_1.0-1/src/msgrate. Edit the Makefile for your environment and type 'make.' How to Run The executables run a single message at a time. The "run_script" scripts

3

Snow accretion on overhead wires  

Science Journals Connector (OSTI)

...Growing process of a snow sleeve for dry-type accretion. Because snow accretion...under sub-freezing temperatures (dry-type snow accretion) will be limited...Mizushima, K. & Kawanishi, S. 1990 Dry type snow accretion on overhead wire...

2000-01-01T23:59:59.000Z

4

Street Trees, Overhead Utlitly Distribution, and Physical Infrastructure  

E-Print Network (OSTI)

Street Trees, Overhead Utlitly Distribution, and Physical Infrastructure: Design Implictions of overhead lines for electric transmission to the customer is common in most communities, and is most likely and mission Research and Responsibilities Design considerations Ecological Considerations Budgeting

Schweik, Charles M.

5

Reducing Execution Overhead in a Data Stream Manager , Uur etintemel  

E-Print Network (OSTI)

is designed to take advantage of our overhead reducing techniques. We also discuss the specific overheads1 Reducing Execution Overhead in a Data Stream Manager Don Carney , Uur Ã?etintemel , Alex Rasin applications include sensor networks, position tracking, fabrication line management, network management

Cherniack, Mitch

6

Reliability of lightning resistant overhead distribution lines  

SciTech Connect

An assessment of the 32 year historical reliability of the 13.8 kV electrical distribution system at the Oak Ridge National Laboratory (ORNL) in Tennessee has yielded several conclusions useful In the planning of Industrial power Systems. The system configuration at ORNL has essentially remained unchanged in the last 32 years which allows a meaningful comparison of reliability trends for the plant`s eight overhead distribution lines, two of which were built in the 1960`s with lightning resistant construction techniques. Meticulous records indicating the cause, duration, and location of 135 electric outages in the plant`s distribution system have allowed a reliability assessment to be performed. The assessment clearly shows how differences in voltage construction class, length, age, and maximum elevation above a reference elevation influence the reliability of overhead power distribution lines. Comparisons are also made between the ORNL historical data and predicted failure rates from ANSI and IEEE industry surveys.

Tolbert, L.M.; Cleveland, J.T.; Degenhardt, L.J.

1995-04-01T23:59:59.000Z

7

High voltage overhead long transmission line design and fault analysis.  

E-Print Network (OSTI)

??The goal of this project is to design a reliable high voltage overhead long transmission line that satisfies specific design criteria including voltage regulation, efficiency,… (more)

Elzain, Mohamed Ali

2011-01-01T23:59:59.000Z

8

POWER-EFFICIENT OFDM WITH REDUCED COMPLEXITY AND FEEDBACK OVERHEAD  

E-Print Network (OSTI)

to the transmitter. Our design exploits the correlation among sub-carriers in order to re- duce feedback overheadPOWER-EFFICIENT OFDM WITH REDUCED COMPLEXITY AND FEEDBACK OVERHEAD Antonio G. Marques Dept. of TSC subscriber lines (DSL), digital audio and video broadcasting (DAB/DVB) standards and wireless local area

Marques, Antonio Garcia

9

Nondestructive Testing of Overhead Transmission Lines: Numerical and Experimental Investigation  

E-Print Network (OSTI)

Overhead transmission lines are periodically inspected using both on-ground and helicopter-aided visual inspection. Factors including sun glare, cloud cover, close proximity to power lines and the rapidly changing visual circumstances make airborne...

Kulkarni, Salil Subhash

2011-02-22T23:59:59.000Z

10

Lossless fault-tolerant data structures with additive overhead  

E-Print Network (OSTI)

We develop the first dynamic data structures that tolerate ? memory faults, lose no data, and incur only an O(? ) additive overhead in overall space and time per operation. We obtain such data structures for arrays, linked ...

Christiano, Paul F.

11

Network interface active messages for low overhead communication on SMP PC clusters  

Science Journals Connector (OSTI)

Keywords: active messages, barrier synchronization, cluster computing, latency hiding, low-overhead communication

Motohiko Matsuda; Yoshio Tanaka; Kazuto Kubota; Mitsuhisa Sato

2000-03-01T23:59:59.000Z

12

DOE-HDBK-1141-2001; Radiological Assessor Training, Overheads  

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

13.1 13.1 Overhead 13.1 DOE-HDBK-1141-2001 Radiological Aspects of Accelerators Objectives: * Identify the general characteristics of accelerators. * Identify the types of particles accelerated. * Identify the two basic types of accelerators. * Identify uses for accelerators. * Define prompt radiation. * Identify prompt radiation sources. OT 13.2 Overhead 13.2 DOE-HDBK-1141-2001 Radiological Aspects of Accelerators (cont.) Objectives: * Define radioactivation. * Explain how contaminated material differs from activated material with regard to radiological concerns. * Identify activation sources. OT 13.3 Overhead 13.3 DOE-HDBK-1141-2001 Radiological Aspects of Accelerators (cont.) Objectives: * Identify engineered and administrative controls at accelerator facilities. * Identify the special

13

Reducing Diff Overhead in Software DSM Systems using  

E-Print Network (OSTI)

Reducing Diff Overhead in Software DSM Systems using RDMA Operations in InfiniBand Ranjit Noronha;Introduction and Motivation Software DSM Modern computer networks Design and Implementation Diff creation and Future Work Outline #12;Software DSM Software DSM (SDSM) HLRC/VIA (Rutgers), TreadMarks (Rice) Depends

Panda, Dhabaleswar K.

14

Differential GPS Measurement of Overhead Conductor Sag: Software Implementation  

E-Print Network (OSTI)

that can measure the sag of overhead transmission conductors for 69 kV circuits and above. The instrument rating of a transmission-line conductor. The software can be used in an on-line energy manage- ment line near the conductors that effectively measures the electric field. A typical GUI screen is shown

15

System Design Considerations for High data Rate Communications Over Multi-wire Overhead Power-  

E-Print Network (OSTI)

System Design Considerations for High data Rate Communications Over Multi-wire Overhead Power communications, multi-wire overhead lines, capacity, OFDM, coding. I. INTRODUCTION The increasing interest, and severe narrowband interference [1]. The channel characteristics of medium voltage overhead power-line

Kavehrad, Mohsen

16

Recommended U-factors for swinging, overhead, and revolving doors  

SciTech Connect

Doors are often an overlooked component in the thermal integrity of the building envelope. Although swinging doors represent a small portion of the shell in residential buildings, their U-factor is usually many times higher than those of walls or ceilings. In some commercial buildings, loading (overhead) doors represent a significant area of high heat loss. Contrary to common perception, there is a wide range in the design, type, and therefore thermal performance of doors. The 1997 ASHRAE Handbook of Fundamentals will contain expanded tables of door U-factors to account for these product variations. This paper presents the results of detailed computer simulations of door U-factors. Recommended U-factors for glazed and unglazed residential and commercial swinging doors and commercial/industrial overhead and revolving doors are presented.

Carpenter, S.C. [Enermodal Engineering Ltd., Waterloo, Ontario (Canada); Hogan, J. [Seattle Dept. of Construction and Land Use, WA (United States)

1996-11-01T23:59:59.000Z

17

Path-sensitive analysis for reducing rollback overheads  

DOE Patents (OSTI)

A mechanism is provided for path-sensitive analysis for reducing rollback overheads. The mechanism receives, in a compiler, program code to be compiled to form compiled code. The mechanism divides the code into basic blocks. The mechanism then determines a restore register set for each of the one or more basic blocks to form one or more restore register sets. The mechanism then stores the one or more register sets such that responsive to a rollback during execution of the compiled code. A rollback routine identifies a restore register set from the one or more restore register sets and restores registers identified in the identified restore register set.

O'Brien, John K.P.; Wang, Kai-Ting Amy; Yamashita, Mark; Zhuang, Xiaotong

2014-07-22T23:59:59.000Z

18

DOE-HDBK-1143-2001; Radiological Control Training for Supervisors - Overheads  

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

Control Training for Supervisors Control Training for Supervisors DOE-HDBK-1143-2001 Overheads Office of Environment, Safety & Health U.S. Department of Energy Radiological Control Training for Supervisors DOE-HDBK-1143-2001 Overheads This page intentionally left blank. ii OT 1.1 DOE-HDBK-1143-2001 Overhead 1.1 Regulatory Documents Objectives: * Identify the hierarchy of regulatory documents. * Define the purposes of 10 CFR Parts 820, 830 and 835. * Define the purpose of the DOE Radiological Control Standard. OT 1.2 DOE-HDBK-1143-2001 Overhead 1.2 Regulatory Documents (cont.) Objectives: * Define the terms

19

Design of overhead transmission lines subject to localized high intensity wind.  

E-Print Network (OSTI)

??Wind loading considered in the design of overhead transmission lines is based on extreme values of synoptic wind, i.e. boundary layer wind originating from largescale… (more)

Langlois, Sébastien, 1981-

2007-01-01T23:59:59.000Z

20

Assessment and analysis of indirect lightning performance of overhead lines  

Science Journals Connector (OSTI)

Abstract This paper presents an efficient method for the assessment of the indirect lightning performance of overhead power lines and analyses the influence of some relevant parameters on the flashover rate. The method is based on a formula to calculate the peak value of lightning-induced voltages in overhead lines over a lossy ground, which considers the front-time of the channel-base current. The results of the method are validated by comparison with results available in the literature. The method is then used to investigate the effect of subsequent strokes on the line flashover rate, leading to the conclusion that their contribution is negligible, as long as no correlation is assumed between front-time and peak value of the strokes (first and subsequent). In the following, the method is used to analyze the influence of some parameters on the lightning performance of overhead lines. The results show that the stroke current front-time influence decreases as the soil resistivity increases, and that a higher front-time leads to a lower flashover rate. It is shown that the use of a fixed front-time T = 5.63 ?s for the first strokes leads to results that match well the results obtained from Cigré’s front-time probabilistic distribution. Regarding the return stroke velocity, the results show that, for soils with resistivity higher than 100 ? m, the flashover rate increases as the return stroke velocity increases. The results also show that a relative velocity vr = 0.4 leads to flashover rates that match well the results obtained considering some correlations between return stroke velocity and peak current proposed in the literature. The influence of the correlation between current peak value and front-time for first strokes is also analyzed and it is shown that the correlation reduces the flashover rate. It is also shown that considering this correlation for first strokes and not for subsequent strokes increases the contribution of the latter to the flashover rate, especially for good conducting soils.

J.O.S. Paulino; C.F. Barbosa; I.J.S. Lopes; W.C. Boaventura

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Effective Methods in Reducing Communication Overheads in Solving  

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

0/2002 Yun (Helen) He, GHC2002 1 0/2002 Yun (Helen) He, GHC2002 1 Effective Methods in Reducing Communication Overheads in Solving PDE Problems on Distributed-Memory Computer Architectures Chris Ding and Yun (Helen) He Lawrence Berkeley National Laboratory 10/10/2002 Yun (Helen) He, GHC2002 2 Outline n Introduction n Traditional Method n Ghost Cell Expansion (GCE) Method n GCE Algorithm n Diagonal Communication Elimination (DCE) Technique n Analysis of GCE Method n Message Volume n Communication Time n Memory Usage and Computational Cost n Performance n Test Problem n Test Results n Conclusions 10/10/2002 Yun (Helen) He, GHC2002 3 Background n On a distributed system, each processor holds a problem

22

Analysis of Lightning-induced Voltages in Overhead Transmission Lines  

Science Journals Connector (OSTI)

Abstract In this work we study the coupling of lightning induced voltages in Overhead Transmission Lines .The study is led directly in the time domain with hold in account the effect of a finite conductivity of the soil. After discretization by the method so-called FDTD (Finite Difference Time Domain) of the lines equations excited by a lightning wave and the application in every node of the network in current and voltage, we deduct a equations system, of which the resolution permits us to deduct the induced electric quantities in every node of the network. In order to confirm our theoretical work, we present a set of applications that allows validating this study.

Mostefa. Boumaiza; Djamel. Labed

2014-01-01T23:59:59.000Z

23

MECCA: A Robust Low-Overhead PUF Using Embedded Memory Array  

E-Print Network (OSTI)

process variations. Existing PUFs suffer from increased overhead to the original design due using a pro- grammable word line duty cycle controller. Since most modern designs already haveMECCA: A Robust Low-Overhead PUF Using Embedded Memory Array Aswin Raghav Krishna, Seetharam

Bhunia, Swarup

24

Methodology for Preparing an Oral Presentation of a Scientific Paper (I assume the talk is organized around slides/overheads)  

E-Print Network (OSTI)

is organized around slides/overheads) 1) Read the paper 2) Take whatever steps necessary to ensure that you constraints on your talk (time, method of presentation, etc.) 5) Determine how many slides/overheads you can use (The ACS recommends spending at least 2 minutes on each slide/overhead)) 6) Determine the levels

Dibble, Theodore

25

Demonstrating Heat Changes on the Overhead Projector with a Projecting Thermometer  

Science Journals Connector (OSTI)

Demonstrating Heat Changes on the Overhead Projector with a Projecting Thermometer ... Demonstrations that provide dramatic heat changes aredescribed, including chemical reactions , dissolving of solutes andsimulation of flameless ration heaters and commercial hot and cold packs. ...

Chinhyu Hur; Sally Solomon; Christy Wetzel

1998-01-01T23:59:59.000Z

26

Combined isomerization of overhead cuts of straight-run naphtha and reformate  

Science Journals Connector (OSTI)

Technology was developed for combined isomerization of IBP-85°C overhead cuts of straight-run naphtha and reformate to reduce the benzene content in automotive gasolines. In comparison to the traditional technolo...

Nguen Van Ty

2008-07-01T23:59:59.000Z

27

EA-0962: Construction and Routine Operation of a 12-kilovolt Overhead  

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

62: Construction and Routine Operation of a 12-kilovolt 62: Construction and Routine Operation of a 12-kilovolt Overhead Powerline and Formal Authorization for a 10-inch and 8-inch Fresh Water Pipeline Right-of-Way at Naval Petroleum Reserve No. 1, Kern County, California EA-0962: Construction and Routine Operation of a 12-kilovolt Overhead Powerline and Formal Authorization for a 10-inch and 8-inch Fresh Water Pipeline Right-of-Way at Naval Petroleum Reserve No. 1, Kern County, California SUMMARY This EA evaluates the environmental impacts of the proposal to install an overhead powerline extension from the U.S. Department of Energy's Naval Petroleum Reserve No. 1 (NPR-1) power source to the WKWD Station A, which will significantly reduce NPR-1's overall utility costs. NPR-1 is known as Elk Hills oil field and is located in the southern San Joaquin Valley,

28

A Testing Platform for Validation of Overhead Conductor Aging Models and Understanding Thermal Limits  

SciTech Connect

Power system equipment manufacturers and researchers continue to experiment with novel overhead electric conductor designs that support better conductor performance and address congestion issues. To address the technology gap in testing these novel designs, Oak Ridge National Laboratory constructed the Powerline Conductor Accelerated Testing (PCAT) facility to evaluate the performance of novel overhead conductors in an accelerated fashion in a field environment. Additionally, PCAT has the capability to test advanced sensors and measurement methods for accessing overhead conductor performance and condition. Equipped with extensive measurement and monitoring devices, PCAT provides a platform to improve/validate conductor computer models and assess the performance of novel conductors. The PCAT facility and its testing capabilities are described in this paper.

Irminger, Philip [ORNL; Starke, Michael R [ORNL; Dimitrovski, Aleksandar D [ORNL; Young II, Marcus Aaron [ORNL; Rizy, D Tom [ORNL; Stovall, John P [ORNL; Overholt, Philip N [U.S. Department of Energy, Office of Electricity Delivery and Energy Reliability (OE)

2014-01-01T23:59:59.000Z

29

Inexpensive dual beam turbidimeter  

Science Journals Connector (OSTI)

...Articles Articles Inexpensive dual beam turbidimeter Cathie Lubell Thomas Barry Edward Brody Gregory Hearn This dual beam turbidimeter...74D728B5-2B21-11D7-8648000102C1865D Inexpensive dual beam turbidimeter Lubell Cathie Author Barry Thomas Author Brody Edward Author Hearn...

Cathie Lubell; Thomas Barry; Edward Brody; Gregory Hearn

30

A new expression for the ground transient resistance matrix elements of multiconductor overhead transmission lines  

E-Print Network (OSTI)

transmission lines F. Rachidi a, *, S.L. Loyka b , C.A. Nucci c , M. Ianoz a a Swiss Federal Institute The ground impedance matrix elements of a multiconductor overhead transmission line do not have analytical-singular, and which describe, within the limits of transmission line theory, both the early-time and late

Loyka, Sergey

31

Measuring the Overhead of Intel C++ CnC over TBB for Gauss-Jordan Elimination  

E-Print Network (OSTI)

Measuring the Overhead of Intel C++ CnC over TBB for Gauss-Jordan Elimination Peiyi Tang Department only by the data dependencies be- tween the tasks. Both Intel C++ Concurrent Col- lections (CnC algorithm and implemented it in TBB. We compare the performances of TBB and CnC, which is built on top

Tang, Peiyi

32

A Novel Low-overhead Delay Testing Technique for Arbitrary Two-Pattern Test Application  

E-Print Network (OSTI)

in manufacturing test to complement stuck-at-fault testing. Design- for-testability techniques, such as enhanced as an alternative to the enhanced scan based delay fault testing method, with significantly less design overhead testing, transition in the state inputs is induced by shifting the scan values by one bit position

Paris-Sud XI, Université de

33

A NegativeOverhead, SelfTimed Pipeline Brian D. Winters and Mark R. Greenstreet  

E-Print Network (OSTI)

A Negative­Overhead, Self­Timed Pipeline Brian D. Winters and Mark R. Greenstreet Department a novel variation of wave pipelining that we call ``surfing.'' In previous wave pipelined designs, timing variation of wave pipelin­ ing called ``surfing.'' In surfing pipelines, a timing pulse is propagated along

Greenstreet, Mark

34

IMPEE PhD Opportunity Project title: LightFoot PhD A PhD Investigation Lightning Protection of HV Overhead Lines with Non-Ideal  

E-Print Network (OSTI)

to simulate this behaviour. This is to provide guidance to overhead line design engineers on lightening Overhead Lines with Non-Ideal Tower Footing Resistance Supervisor(s): Dr Jonathan Swingler j.swingler@hw.ac.uk Abstract LightFoot PhD ­ A PhD Investigation Lightning Protection of HV Overhead Lines with Non-Ideal Tower

Greenaway, Alan

35

Characterization Results For The 2013 HTF 3H Evaporator Overhead Samples  

SciTech Connect

This report tabulates the radiochemical analysis of the 3H evaporator overhead sample for {sup 137}Cs, {sup 90}Sr, and {sup 129}I to meet the requirements in the Effluent Treatment Project (ETP) Waste Acceptance Criteria (WAC) (rev. 6). This report identifies the sample receipt date, preparation method, and analysis performed in the accumulation of the listed values. All data was found to be within the ETP WAC (rev. 6) specification for the Waste Water Collection Tanks (WWCT).

Washington, A. L. II

2013-12-04T23:59:59.000Z

36

Meteorological conditions associated with the full-span galloping oscillations of overhead transmission lines  

E-Print Network (OSTI)

transmission lines J. C.R. Hunt, M.A., Ph.D., A.F.I.M.A., and M.D. Rowbottom,B.Sc., PhJD., A.F.I.M.A. Indexing transmission lines over a 7-year period have been correlated in the form of histograms of number of faults-span galloping oscillations of ice-accreted bundled overhead transmission lines. The main assumption made

Hunt, Julian

37

The Reliability Investigation on ACSR Splice Connector Systems Used in Overhead Power transmission Lines  

SciTech Connect

Due to material discontinuity and inherited forming mechanism from a crimped-type splice connector, the associated conductor-connector system is highly sensitive to system components aging, especially during high-temperature operations. Furthermore, due to the increase in power demand and limited investment in new infrastructure, existing overhead power transmission lines often need to operate at temperatures higher than the original designed values. This has led to the accelerated aging and degradation of conductor-connector systems. The implications of connector aging are two-fold: (1) significant increase in resistivity of the splice connector and (2) significant reduction in the connector clamping strength. Therefore, splice connectors are one of the weakest links in the electric power transmission infrastructure. In this paper we will discuss the reliability of splice connector systems, including both single stage and two stage splice connectors, used in ACSR conductor of transmission lines under high temperature operations.

Wang, Jy-An John [ORNL] [ORNL; Jiang, Hao [ORNL] [ORNL; Ren, Fei [ORNL] [ORNL

2012-01-01T23:59:59.000Z

38

Appointed BrOadcast (ABO): Reducing Routing Overhead in IEEE 802.11 Mobile Ad Hoc Networks  

E-Print Network (OSTI)

1 Appointed BrOadcast (ABO): Reducing Routing Overhead in IEEE 802.11 Mobile Ad Hoc Networks Chun-enhanced and standard IEEE 802.11 nodes can coexist in a MANET is also discussed. Keywords: mobile ad hoc network, promiscuous mode, broadcast, IEEE 802.11, routing. #12;2 1. Introduction In mobile ad hoc networks (MANETs

Chen, Sheng-Wei

39

Dual Plane Imaging  

E-Print Network (OSTI)

We outline a technique called Dual Plane Imaging which should significantly improve images which would otherwise be blurred due to atmospheric turbulence. The technique involves capturing all the spatial, directional and temporal information about the arriving photons and processing the data afterwards to produce the sharpened images. The technique has particular relevance for imaging at around 400-1000nm on extremely large telescopes (ELTs).

Parry, Ian

2015-01-01T23:59:59.000Z

40

Dual-Band and Dual-Polarization Patch Antenna with High Isolation Characteristic  

E-Print Network (OSTI)

1 Dual-Band and Dual-Polarization Patch Antenna with High Isolation Characteristic Dong-Hyuk Choi and Seong-Ook Park, Member, IEEE Abstract--A patch antenna with dual-band and dual-polarization operation--Coplanar waveguide (CPW) resonant cell, dual-band, dual-polarization, isolation, patch antenna I. INTRODUCTION

Park, Seong-Ook

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Monitoring the magnetic field in houses under 50 Hz high-voltage overhead transmission lines  

Science Journals Connector (OSTI)

This paper deals with a one-week monitoring of the 50 Hz magnetic field on the ground floor and the first floor of houses under 150, 220 and 380 kV high-voltage overhead three-phase AC transmission lines. The field strength varied with the current intensity, the conductor height, and the storey of the house. Because current intensity varies with time the magnetic field depended on the time of day and the day of the week. The recorded magnetic field ranged from 0.1 µT to 4.5 µT. The maximum value was at least 20 times weaker than the 100 µT exposure level recommended by the guidelines of the International Radiation Protection Association (IRPA) and about 140 times smaller than the 640 µT of the European Prestandard (CENELEC). The B-field was, for 99.9% of the measuring time, larger than the 0.2 µT cut-off point used to define categories of exposed and unexposed subjects in EMF epidemiological studies and, for 99.3% of the time, was greater than the 0.3 µT level used by US private engineering companies as the 'prudent avoidance' exposure limit. The weakest average magnetic field was at least 40 times larger than the 0.02 µT background value.

G. Decat; J. Van Tongerloo

1998-01-01T23:59:59.000Z

42

Estimation of the minimum shielding failure flashover current for first and subsequent lightning strokes to overhead transmission lines  

Science Journals Connector (OSTI)

Abstract ATP-EMTP simulations are performed to estimate the minimum shielding failure current causing flashover in overhead transmission lines with operating voltage in the range of 66 kV up to 735 kV. This critical current, affecting shielding failure flashover rate, is of great importance for assessing the insulation coordination of overhead transmission lines and the connected substations. The minimum shielding failure current causing flashover of line insulation is highly dependent upon insulator string flashover modelling and, also, markedly higher than that calculated according to the relevant IEEE Std 1243-1997 simplified expression. A modification of the latter is suggested by using multiplication factors of 1.5 and 1.65 for first and subsequent lightning strokes, respectively, so as to account for the increased dielectric strength of line insulator strings under non-standard lightning overvoltage surges. Alternatively, the critical currents can be respectively estimated by using average negative breakdown gradients per unit length of insulator string of 680 kV/m and 750 kV/m. The shielding failure flashover rate of the overhead transmission lines, being greatly influenced by insulator string flashover modelling, is lower than that obtained based on the critical current according to IEEE Std 1243-1997.

Zacharias G. Datsios; Pantelis N. Mikropoulos; Thomas E. Tsovilis

2014-01-01T23:59:59.000Z

43

Dual Tank Fuel System  

DOE Patents (OSTI)

A dual tank fuel system has primary and secondary fuel tanks, with the primary tank including a filler pipe to receive fuel and a discharge line to deliver fuel to an engine, and with a balance pipe interconnecting the primary tank and the secondary tank. The balance pipe opens close to the bottom of each tank to direct fuel from the primary tank to the secondary tank as the primary tank is filled, and to direct fuel from the secondary tank to the primary tank as fuel is discharged from the primary tank through the discharge line. A vent line has branches connected to each tank to direct fuel vapor from the tanks as the tanks are filled, and to admit air to the tanks as fuel is delivered to the engine.

Wagner, Richard William (Albion, NY); Burkhard, James Frank (Churchville, NY); Dauer, Kenneth John (Avon, NY)

1999-11-16T23:59:59.000Z

44

Dual surface interferometer  

DOE Patents (OSTI)

A double-pass interferometer is provided which allows direct measurement of relative displacement between opposed surfaces. A conventional plane mirror interferometer may be modified by replacing the beam-measuring path cube-corner reflector with an additional quarterwave plate. The beam path is altered to extend to an opposed plane mirrored surface and the reflected beam is placed in interference with a retained reference beam split from dual-beam source and retroreflected by a reference cube-corner reflector mounted stationary with the interferometer housing. This permits direct measurement of opposed mirror surfaces by laser interferometry while doubling the resolution as with a conventional double-pass plane mirror laser interferometer system.

Pardue, R.M.; Williams, R.R.

1980-09-12T23:59:59.000Z

45

Ultra-scale vehicle tracking in low spatial-resolution and low frame-rate overhead video  

SciTech Connect

Overhead persistent surveillance systems are becoming more capable at acquiring wide-field image sequences for long time-spans. The need to exploit this data is becoming ever greater. The ability to track a single vehicle of interest or to track all the observable vehicles, which may number in the thousands, over large, cluttered regions while they persist in the imagery either in real-time or quickly on-demand is very desirable. With this ability we can begin to answer a number of interesting questions such as, what are normal traffic patterns in a particular region or where did that truck come from? There are many challenges associated with processing this type of data, some of which we will address in the paper. Wide-field image sequences are very large with many thousands of pixels on a side and are characterized by lower resolutions (e.g. worse than 0.5 meters/pixel) and lower frame rates (e.g. a few Hz or less). The objects in the scenery can vary in size, density, and contrast with respect to the background. At the same time the background scenery provides a number of clutter sources both man-made and natural. We describe our current implementation of an ultrascale capable multiple-vehicle tracking algorithm for overhead persistent surveillance imagery as well as discuss the tracking and timing performance of the currently implemented algorithm which is aimed at utilizing grayscale electrooptical image sequences alone for the track segment generation.

Carrano, C J

2009-05-20T23:59:59.000Z

46

Dual recycling for GEO 600  

Science Journals Connector (OSTI)

Dual recycling is the combination of signal recycling and power recycling; both optical techniques improve the shot-noise-limited sensitivity of interferometric gravitational-wave detectors. In addition, signal recycling can reduce the loss of light power due to imperfect interference and allows us, in principle, to beat the standard quantum limit. The interferometric gravitational-wave detector GEO 600 is the first of the kilometre-scale detectors to use signal recycling. We have recently equipped the detector with a signal-recycling mirror with a transmittance of 1%. In this paper, we present details of the detector commissioning and the first locks of the dual-recycled interferometer.

H Grote; A Freise; M Malec; G Heinzel; B Willke; H Lück; K A Strain; J Hough; K Danzmann

2004-01-01T23:59:59.000Z

47

Dual gravity and E11  

E-Print Network (OSTI)

We consider the equation of motion in the gravity sector that arises from the non-linear realisation of the semi-direct product of E11 and its first fundamental representation, denoted by l1, in four dimensions. This equation is first order in derivatives and at low levels relates the usual field of gravity to a dual gravity field. When the generalised space-time is restricted to be the usual four dimensional space-time we show that this equation does correctly describe Einstein's theory at the linearised level. We also comment on previous discussions of dual gravity.

Peter West

2014-11-04T23:59:59.000Z

48

Dual gravity and E11  

E-Print Network (OSTI)

We consider the equation of motion in the gravity sector that arises from the non-linear realisation of the semi-direct product of E11 and its first fundamental representation, denoted by l1, in four dimensions. This equation is first order in derivatives and at low levels relates the usual field of gravity to a dual gravity field. When the generalised space-time is restricted to be the usual four dimensional space-time we show that this equation does correctly describe Einstein's theory at the linearised level. We also comment on previous discussions of dual gravity.

West, Peter

2014-01-01T23:59:59.000Z

49

Progress in the dual simplex method for large scale LP problems: practical dual phase 1 algorithms  

Science Journals Connector (OSTI)

The dual simplex algorithm has become a strong contender in solving large scale LP problems. One key problem of any dual simplex algorithm is to obtain a dual feasible basis as a starting point. We give an overview of methods which have been proposed ... Keywords: Dual simplex algorithm, Linear programming, Mathematical optimization system (MOPS)

Achim Koberstein; Uwe H. Suhl

2007-05-01T23:59:59.000Z

50

Dual Axis Radiographic Hydrodynamic Test Facility | National...  

National Nuclear Security Administration (NNSA)

Dual Axis Radiographic Hydrodynamic Test Facility | National Nuclear Security Administration People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear...

51

Gravity Dual of Superconformal Anomaly  

E-Print Network (OSTI)

The supergravity dual of superconformal anomaly in a four-dimensional supersymmetric gauge theory is investigated. We consider a well-established dual correspondence between the ${\\cal N}=1$ $SU(N+M)\\times SU(N)$ supersymmetric gauge theory with two flavors of matter fields in the bifundamental representation of gauge group and the type IIB superstring in the space-time background furnished by the Klebanov-Strassler (K-S) solution. The D-brane configuration for these two dual theories consists of N D3 branes and M fractional $D3$ branes in the singular space-time composed of a direct product of M^4 and a six-dimensional conifold ${\\cal C}_6$ with the base $T^{1,1}$. The superconformal anomaly originate from fractional branes frozen at the apex of ${\\cal C}_6$. While on the gravity side, the fractional branes deform the $AdS_5\\times T^{1,1}$ space-time background and partially break local supersymmetry of type IIB supergravity. We find that the deformation on $AdS_5\\times T^{1,1}$ leads to the spontaneous breaking local symmetries in gauged AdS_5 supergravity and consequently a super-Higgs mechanism arises. We thus conclude that the super-Higgs mechanism in gauged supergravity is dual to the superconformal anomaly of supersymmetric gauge theory in terms of gauge/gravity correspondence.

W. F. Chen

2005-08-16T23:59:59.000Z

52

Increasing the reliability of the shutdown of 500 - 750-kV overhead lines equipped with shunt reactors in an unsuccessful three-phase automatic repeated closure cycle  

SciTech Connect

The reasons for circuit-breaker failures during repeated disconnection of 500 - 750 kV overhead lines with shunt reactors in a cycle of unsuccessful three-phase automatic reconnection (TARC) are analyzed. Recommendations are made for increasing the operating reliability of power transmission lines with shunt reactors when there is unsuccessful reconnection.

Kuz'micheva, K. I.; Merzlyakov, A. S.; Fokin, G. G. [JSC 'R and D Center at Federal Grid Company of the United Power System' (Russian Federation)

2013-05-15T23:59:59.000Z

53

Dual use power supply development  

Science Journals Connector (OSTI)

Size weight efficiency and reliability define space power systems. Then years ago NASA re?emphasized that missions such as Space Station needed cost effective critical technologies one being power conversion. Thus NASA began to emphasize ‘‘dual?use’’ technology through its center for Commercial Development of Space (mid 1980s). This CCDS program funded research and development efforts needed for future space missions as well as terrestrial applications for commercial markets. Maxwell and Auburn University (Space Power Institute) jointly developed reliable power systems for manned space projects as well as commercial applications of high power high voltage switchmode power supplies. These serve the medical scientific and industrial markets (lasers accelerators and intense light sources). These applications required improvements in power density efficiency regulation reliability and cost effectiveness to be successful. One of NASA’s first programs at Auburn and Maxwell was a high frequency series resonant power converter optimized for commercial applications. It also meets the needs of space missions (additional space flight qualification is needed). This power converter topology demonstrates dual?use technology for power density power?to?weight regulation reliability and cost effectiveness. All goals were exceeded for both space and terrestrial applications. This was the first product of NASA’s CCDS program producing a family of high voltage capacitor charging power supplies. Maxwell’s CCDS capacitor power supplies are achieving greater acceptance demonstrating the value of the CCDS program.

Alan C. Kolb; Bryan E. Strickland

1995-01-01T23:59:59.000Z

54

Friction Coefficient for Quarks in Supergravity Duals  

E-Print Network (OSTI)

We study quarks moving in strongly-coupled plasmas that have supergravity duals. We compute the friction coefficient of strings dual to such quarks for general static supergravity backgrounds near the horizon. Our results also show that a previous conjecture on the bound has to be modified and higher friction coefficients can be achieved.

E. Antonyan

2006-11-22T23:59:59.000Z

55

Dual spatial maps of transcript and protein abundance in the...  

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

Dual spatial maps of transcript and protein abundance in the mouse brain. Dual spatial maps of transcript and protein abundance in the mouse brain. Abstract: Integrating...

56

Low and high Temperature Dual Thermoelectric Generation Waste...  

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

Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles Low and high Temperature Dual Thermoelectric Generation Waste Heat...

57

Sensitive Immunosensor for Cancer Biomarker Based on Dual Signal...  

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

Immunosensor for Cancer Biomarker Based on Dual Signal Amplification Strategy of Graphene Sheets and Multi-Enzyme Sensitive Immunosensor for Cancer Biomarker Based on Dual Signal...

58

POLICY GUIDANCE MEMORANDUM #11 Approval Process for Dual Compensation...  

Office of Environmental Management (EM)

11 Approval Process for Dual Compensation Waivers for Reemployed Annuitants Process to grant dual compensation (salary-offset) waivers to reemployed annuitants who work on a...

59

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)...

60

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

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

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

1994-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Dual manifold heat pipe evaporator  

DOE Patents (OSTI)

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

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

1994-01-04T23:59:59.000Z

62

Biomass Gasification in Dual Fluidized Bed Gasifier  

Science Journals Connector (OSTI)

The dual fluidized bed gasification technology is prospective because it produces high...2...dilution even when air is used to generate the required endothermic heat via in situ combustion. This study is devoted ...

Toshiyuki Suda; Takahiro Murakami…

2007-01-01T23:59:59.000Z

63

Economics of dual purpose production alternatives in the Mexican tropics  

E-Print Network (OSTI)

Technological, marketing, and financial alternatives to the dual purpose production system in Central Veracruz, Mexico were analyzed to assess their economic viability. A large dual purpose production operation was characterized in a baseline...

Ochoa-Ochoa, Rene Federico

1997-01-01T23:59:59.000Z

64

A Universal Dual-Fuel Controller for OEM/Aftermarket Diesel Engineswith Comprehensive Fuel & Emission Control  

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

Presents a universal dual fuel ratio controller designed to control the fueling and emissions of dual fuel systems

65

Common Mathematical Foundations of Expected Utility and Dual ...  

E-Print Network (OSTI)

distributions, and their convex combinations correspond to lotteries. The dual utility theory uses convex combinations of comonotonic real random variables, ...

2012-11-24T23:59:59.000Z

66

Dual Axis Radiographic Hydrodynamic Test Facility  

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

DARHT Facility: A critical component of stockpile stewardship DARHT Facility: A critical component of stockpile stewardship A new research frontier awaits! Our door is open and we thrive on mutually beneficial partnerships, collaborations that drive innovations and new technologies. April 12, 2012 Dominic Tafoya and Dave Honaberger prepare a refurbished DARHT (Dual Axis Radiographic Hydrotest Facility) 2nd axis accelerator cell for magnetic axis alignment measurements. Contact Group Leader Terry Priestley (505) 665-1330 Email Deputy Group Leader Tim Ferris (505) 665-2179 Email Hydrotests are critical in assessing nuclear weapons in nation's stockpile Dual Axis Radiographic Hydrodynamic Test facility 4:17 How DARHT Works The weapons programs at Los Alamos have one principal mission: ensure the safety, security, and effectiveness of nuclear weapons in our nation's

67

The World as a Dual Josephson Junction  

E-Print Network (OSTI)

We examine some of the implications of the field-theoretical mechanism for the localization of gauge fields on hypersurfaces in higher-dimensional bulk space-time. This mechanism exploits the analogy between confinement and dual superconductivity. In the simplest case of a photon localized on a (2+1)-dimensional surface in a (3+1)-dimensional bulk, we argue that the system behaves like a dual Josephson junction. This implies that the effective gauge theory on the surface is not free, but displays weak confinement with a linear potential. We comment on the relevance of our results for the realistic case of a (3+1)-dimensional surface in a space-time with one or more extra dimensions.

N. Tetradis

2000-02-24T23:59:59.000Z

68

Adaptive upscaling with the dual mesh method  

SciTech Connect

The objective of this paper is to demonstrate that upscaling should be calculated during the flow simulation instead of trying to enhance the a priori upscaling methods. Hence, counter-examples are given to motivate our approach, the so-called Dual Mesh Method. The main steps of this numerical algorithm are recalled. Applications illustrate the necessity to consider different average relative permeability values depending on the direction in space. Moreover, these values could be different for the same average saturation. This proves that an a priori upscaling cannot be the answer even in homogeneous cases because of the {open_quotes}dynamical heterogeneity{close_quotes} created by the saturation profile. Other examples show the efficiency of the Dual Mesh Method applied to heterogeneous medium and to an actual field case in South America.

Guerillot, D.; Verdiere, S.

1997-08-01T23:59:59.000Z

69

Fabrication of dual porosity electrode structure  

DOE Patents (OSTI)

A substantially entirely fibrous ceramic which may have dual porosity of both micro and macro pores. Total porosity may be 60-75% by volume. A method of spraying a slurry perpendicularly to an ambient stream of air is disclosed along with a method of removing binders without altering the fiber morphology. Adding fine ceramic particulates to the green ceramic fibers enhances the sintering characteristics of the fibers.

Smith, James L. (Lemont, IL); Kucera, Eugenia H. (Downers Grove, IL)

1991-01-01T23:59:59.000Z

70

Fabrication of dual porosity electrode structure  

DOE Patents (OSTI)

A substantially entirely fibrous ceramic is described which may have dual porosity of both micro and macro pores. Total porosity may be 60-75% by volume. A method of spraying a slurry perpendicularly to an ambient stream of air is disclosed along with a method of removing binders without altering the fiber morphology. Adding fine ceramic particulates to the green ceramic fibers enhances the sintering characteristics of the fibers. 3 figures.

Smith, J.L.; Kucera, E.H.

1991-02-12T23:59:59.000Z

71

Dual fueling of a Caterpillar 3406 diesel engine  

SciTech Connect

A Caterpillar 3406 turbocharged diesel engine was converted to operate in a dual-fuel mode and was evaluated for performance and emission characteristics for both diesel and natural gas operation. Full load power was achieved with dual fueling without knock. Similar fuel efficiencies were obtained with dual fueling a high loads, but efficiencies were lower for low loads. Bosch smoke numbers were reduced by over 50% with dual fueling for all cases investigated. NO{sub x} emissions were found to be lower at low loads and at high speeds under high load. CO emissions were significantly increased for dual fueling while CO{sub 2} concentrations in the exhaust were reduced for dual fueling.

Bell, S.R.; Midkiff, K.C.; Doughty, G.; Brett, C.E. [Univ. of Alabama, Tuscaloosa, AL (United States)

1996-05-01T23:59:59.000Z

72

dual-phase-ceramic-asu | netl.doe.gov  

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

Targets Systems Analysis Regulatory Drivers Program Plan Capture Handbook Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic Carbonate Membrane Reactor Project No.:...

73

Dual Models with Global SU(2,2) Symmetry  

Science Journals Connector (OSTI)

The possibility of enlarging the gauge symmetry of the dual resonance models is considered by studying the structure of SU(2,2)- [or SO(4,2)] invariant dual models. n-point functions based on the degenerate representations of SU(2,2) are worked out in detail, and a condition under which these amplitudes are dual is specified. Dual models based on the nondegenerate representations are also discussed. Through a physical interpretation of the characteristics which emerge, a possible connection between the dimension N-1 of the hadronic matter and the gauge-symmetry group SO(N, 2) is pointed out.

Freydoon Mansouri

1973-08-15T23:59:59.000Z

74

Protection of Li Anodes Using Dual Phase Electrolytes  

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

cells with high energy anode and dual-phase electrolyte systems Partners BASF SE, Germany * Development of Li-S battery materials 3 Relevance. Project Objectives. * Develop a...

75

Management entrenchment and the valuation discount of dual class firms  

Science Journals Connector (OSTI)

Abstract Prior studies provide empirical evidence that dual class firms are discounted compared to single class firms due to the extraction of private benefits. This study examines the link between managerial entrenchment and the dual class discount. Using propensity score matching and conditioning for past underperformance, the paper shows that investors apply a greater discount to the value of dual class firms as the degree of managerial entrenchment increases. The impact of entrenchment on dual class discount is more pronounced when the CEO is the controlling shareholder compared to when the controlling shareholder is a director or the chairman of the board.

Vishaal Baulkaran

2014-01-01T23:59:59.000Z

76

An EP theorem for dual linear complementarity problem  

E-Print Network (OSTI)

Mar 2, 2007 ... An EP theorem for dual linear complementarity problem. Illés Tibor (illes ***at*** math.elte.hu) Marianna Nagy (nmariann ***at*** cs.elte.hu)

Illés Tibor

2007-03-02T23:59:59.000Z

77

An EP theorem for dual linear complementarity problems  

E-Print Network (OSTI)

present an existentially polytime (EP) theorem for the dual LCP with arbitrary ... goals are discussed in Section 2, along with the LCP duality theorem and an EP.

2008-01-20T23:59:59.000Z

78

Project Profile: Sensible Heat, Direct, Dual-Media Thermal Energy...  

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

Sensible Heat, Direct, Dual-Media Thermal Energy Storage Module Acciona logo Acciona Solar, under the Thermal Storage FOA, plans to develop a prototype thermal energy storage...

79

Geothermal: Sponsored by OSTI -- Final Report: Geothermal Dual...  

Office of Scientific and Technical Information (OSTI)

Report: Geothermal Dual Acoustic Tool for Measurement of Rock Stress Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us | Admin Log On HomeBasic Search...

80

Improving the Performance of Stochastic Dual Dynamic Programming  

E-Print Network (OSTI)

Jul 13, 2012 ... 3 describes the three different tree-traversal strategies we shall test and ...... ria for stochastic dual dynamic programming: a case study in ...

2012-07-13T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Gravity dual of the Ising model  

Science Journals Connector (OSTI)

We evaluate the partition function of three-dimensional theories of gravity in the quantum regime, where the anti–de Sitter (AdS) radius is Planck scale and the central charge is of order one. The contribution from the AdS vacuum sector can—with certain assumptions—be computed and equals the vacuum character of a minimal model conformal field theory. The torus partition function is given by a sum over geometries which is finite and computable. For generic values of Newton’s constant G and the AdS radius ?, the result has no Hilbert space interpretation, but in certain cases it agrees with the partition function of a known conformal field theory. For example, the partition function of pure Einstein gravity with G=3? equals that of the Ising model, providing evidence that these theories are dual. We also present somewhat weaker evidence that the three-state and tricritical Potts models are dual to pure higher spin theories of gravity based on SL(3) and E6, respectively.

Alejandra Castro; Matthias R. Gaberdiel; Thomas Hartman; Alexander Maloney; Roberto Volpato

2012-01-19T23:59:59.000Z

82

Primal-Dual Combinatorial Algorithms May 8, 2009  

E-Print Network (OSTI)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Primal Dual Algorithms for Fractional Packing and Covering 9 3.1 Feasibility Problem algorithm for fractional packing and covering, which greatly outperformed previous approaches on the a largePrimal-Dual Combinatorial Algorithms Qihui Zhu May 8, 2009 #12;ABSTRACT Linear program and its

Plotkin, Joshua B.

83

Dual port temperature sensor tag for passive UHF RFID systems  

E-Print Network (OSTI)

Dual port temperature sensor tag for passive UHF RFID systems J. Virtanen Rauma Research Unit and to simplify the measurement procedure. Design/methodology/approach ­ The sensor tag is based on a dual port sensing concept in which two ports are used to obtain sensor readings. By utilizing two ports instead

Elsherbeni, Atef Z.

84

SINGLE AND DUAL LAYER THIN FILM BULGE TESTING  

E-Print Network (OSTI)

film windows that are used in Next Generation Lithography masks and certain MEMS devices. The bulge testing method measures the mechanical properties of a thin film by isolating it in a thin film window of the system. Figure 6 Dual Layer Thin Film Membrane Window For a dual layer membrane the effective total

Huston, Dryver R.

85

Evaluation of liquid lift approach to dual gradient  

E-Print Network (OSTI)

the mudline to the rig floor so as to maintain the bottom hole pressure. Several methods have been developed to achieve the dual gradient drilling principle. For this research project, we paid more attention to the liquid lift, dual gradient drilling (riser...

Okafor, Ugochukwu Nnamdi

2009-05-15T23:59:59.000Z

86

Evaluation of liquid lift approach to dual gradient drilling  

E-Print Network (OSTI)

the mudline to the rig floor so as to maintain the bottom hole pressure. Several methods have been developed to achieve the dual gradient drilling principle. For this research project, we paid more attention to the liquid lift, dual gradient drilling (riser...

Okafor, Ugochukwu Nnamdi

2008-10-10T23:59:59.000Z

87

Stable lattice Boltzmann schemes with a dual entropy approach  

E-Print Network (OSTI)

Stable lattice Boltzmann schemes with a dual entropy approach for monodimensional nonlinear waves of a lattice Boltzmann scheme. This method is expressed in terms of the dual of the mathematical entropy with D1Q3 lattice Boltzmann schemes for the Burgers equation. It conducts to the explicitation of three

Boyer, Edmond

88

DUAL OPERATOR SYSTEMS DAVID P. BLECHER AND BOJAN MAGAJNA  

E-Print Network (OSTI)

DUAL OPERATOR SYSTEMS DAVID P. BLECHER AND BOJAN MAGAJNA Abstract. We characterize weak* closed system, which is the dual of an operator space, can be represented completely isometrically and weak, and also in mathematical physics. The natural setting for this notion is the category of operator systems

Magajna, Bojan

89

Parameter Estimation Using Dual Fractional Power Filters Jason M. Kinser  

E-Print Network (OSTI)

by the user, they only have to be contained within the training set. A dual filter system will be created from an unknown input from the training set was operated on by the filter the constraint value associatedParameter Estimation Using Dual Fractional Power Filters Jason M. Kinser The Institute

Kinser, Jason M.

90

On Parallelizing Dual Decomposition in Stochastic Integer Programming |  

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

On Parallelizing Dual Decomposition in Stochastic Integer Programming On Parallelizing Dual Decomposition in Stochastic Integer Programming Title On Parallelizing Dual Decomposition in Stochastic Integer Programming Publication Type Journal Article Year of Publication 2013 Authors Lubin, M, Martin, K, Petra, CG, Sandikci, B Journal Operations Research Letters Volume 41 Start Page 252-258 Issue 3 Date Published 05/2013 Other Numbers ANL/MCS-P3037-0912 Abstract For stochastic mixed-integer programs, we revisit the dual decomposition algorithm of Care and Schultz from a computational perspective with the aim of its parallelization. We address an important bottleneck of parallel execution by identifying a formulation that permits the parallel solution of the master program by using structure-exploiting interior-point solvers. Our results demonstrate the potential for parallel speedup and the importance of regularization (stabilization) in the dual optimization. Load imbalance is identified as a remaining barrier to parallel scalability.

91

Dual Rater Competency Assessment FAQ | Department of Energy  

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

Dual Rater Competency Assessment FAQ Dual Rater Competency Assessment FAQ Dual Rater Competency Assessment FAQ 1. What is the purpose of the dual rater assessments? The purpose of the dual rater competency assessment is to provide a clearer picture of the individual's developmental needs by combining self-assessment and supervisory input. Together, these two viewpoints provide a more informed assessment of individual strengths and developmental needs. Managers/supervisors and employees will be able to use competency assessment results to identify and address critical skills gaps through targeted training and development. From an organizational perspective, the competency assessment process enables organizations to assess workforce competencies and helps ensure its current workforce has the right knowledge and skills to accomplish the

92

York Electric Cooperative - Dual Fuel Heat Pump Rebate Program | Department  

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

York Electric Cooperative - Dual Fuel Heat Pump Rebate Program York Electric Cooperative - Dual Fuel Heat Pump Rebate Program York Electric Cooperative - Dual Fuel Heat Pump Rebate Program < Back Eligibility Commercial Fed. Government Industrial Local Government Nonprofit Residential State Government Savings Category Heating & Cooling Commercial Heating & Cooling Heat Pumps Maximum Rebate 2 systems per household Program Info State South Carolina Program Type Utility Rebate Program Rebate Amount Dual Fuel Heat Pumps: $400/system Provider York Electric Cooperative, Inc York Electric Cooperative, Inc. (YEC) offers a $400 rebate to members who install a dual fuel heat pump in homes or businesses. The rebates are for primary residence and/or commercial and industrial locations. The incentive is for the property owner only, meaning that renters/tenants are not

93

Dual-bonded catalyst layer structure cathode for PEMFC  

Science Journals Connector (OSTI)

Novel electrode structure based on dual-bonded catalyst layer structure is reported to elevate proton exchange membrane fuel cell (PEMFC) cathode performance. Differing from conventional cathode with simplex PTFE or ionomer as binder material in catalyst layer (CL), dual-bonded CL combines those two types of binders, respectively, in a composite structure. In order to develop a cathode possessing the superior merits of both mass transport and proton transfer, a PTFE-rich CL and an ionomer-rich CL were fabricated on gas diffusion layer in proper order. Polarization characteristic of cathodes with dual-bonded CL, conventional PTFE-bonded CL and ionomer-bonded CL were evaluated at ambient pressure in oxygen/air. Better performance of cathode was achieved with dual-bonded, compared with conventional structures. Electric yield rate of dual-bonded cathode was about 50%, whilst that of conventional cathodes was about 40%.

Xuewei Zhang; Pengfei Shi

2006-01-01T23:59:59.000Z

94

Snow accretion on overhead wires  

Science Journals Connector (OSTI)

...the accreted snow and solar radiation, but these...Since the Japanese utilities experienced severe damage...positive air temperature, solar radiation or rain after...carried by the wire, solar radiation, temperature...France, CRIEPI and the utilities of Japan that have participated...

2000-01-01T23:59:59.000Z

95

Dual-keel electrodynamic maglev system  

DOE Patents (OSTI)

A propulsion and stabilization system is disclosed with a plurality of superconducting magnetic devices affixed to the dual-keels of a vehicle, where the superconducting magnetic devices produce a magnetic field when energized. The system also includes a plurality of figure-eight shaped null-flux coils affixed to opposing vertical sides of slots in a guideway. The figure-eight shaped null-flux coils are vertically oriented, laterally cross-connected in parallel, longitudinally connected in series, and continue the length of the vertical slots providing levitation and guidance force. An external power source energizes the figure-eight shaped null-flux coils to create a magnetic traveling wave that interacts with the magnetic field produced by the superconducting magnets to impart motion to the vehicle. 6 figs.

He, J.L.; Wang, Z.; Rote, D.M.; Coffey, H.T.; Hull, J.R.; Mulcahy, T.M.; Cal, Y.

1996-12-24T23:59:59.000Z

96

Dual-fueling turbocharged diesels with ethanol  

SciTech Connect

Spray addition and carburetion methods were tested for dual-fueling a turbocharged, 65 kW diesel tractor. Approximately 30 percent of the fuel energy for the tractor was supplied by spraying ethanol into the intake air and about 46 percent by carburetion with little affect on the engine thermal efficiency. Further substitution of diesel fuel with ethanol was limited by knock. As the amount of ethanol fed into the engine was increased, ignition apparently changed from the steady burning process which normally occurs in a diesel engine to a rapid explosion which caused knock. The best fuel for the spray approach was a 50 percent ethanol/water solution and with the carburetor it was an 80 percent ethanol/water solution. (Refs. 6).

Cruz, J.M.; Rotz, C.A.; Watson, D.H.

1982-09-01T23:59:59.000Z

97

Dual-fueling turbocharged diesels with ethanol  

SciTech Connect

Spray addition and carburetion methods were tested for dual-fueling a turbocharged, 65 kW diesel tractor. Approximately 30 percent of the fuel energy for the tractor was supplied by spraying ethanol into the intake air and about 46 percent by carburetion with little affect on the engine thermal efficiency. Further substitution of diesel fuel with ethanol was limited by knock. As the amount of ethanol fed into the engine was increased, ignition apparently changed from the steady burning process which normally occurs in a diesel engine to a rapid explosion which caused knock. The best fuel for the spray approach was a 50 percent ethanol/water solution and with the carburetor it was an 80 percent ethanol/water solution.

Cruz, J.M.; Rotz, C.A.; Watson, D.H.

1982-09-01T23:59:59.000Z

98

Cooperative advertising in a dual channel supply chain  

Science Journals Connector (OSTI)

The focus of this study is cooperative (co-op) advertising and the impact it has on the dual channel supply chain. We obtain equilibrium pricing and co-op advertising policies under two different competitive scenarios: Bertrand and Stackelberg equilibrium. We also compare the profit gains under these two marketing games. Based on our results, we propose the optimal strategies that system members should adopt in a dual channel competition. We also illustrate that by strategically implementing a cooperative advertising strategy under different market structures, both the system players can effectively improve their overall profits in a dual channel supply chain management.

Ruiliang Yan; Sanjoy Ghose; Amit Bhatnagar

2006-01-01T23:59:59.000Z

99

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility  

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

DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT: Dual-Axis Radiographic Hydrodynamic Test Facility DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons. At the Los Alamos National Laboratory (LANL), the Dual-Axis Radiographic Hydrodynamic Test Facility, or DARHT, supports a critical component of LANL's primary mission: to ensure the safety, security, and effectiveness of nuclear weapons in our nation's stockpile. Los Alamos scientists built DARHT, the world's most powerful x-ray machine, to analyze mockups of nuclear weapons.

100

Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment  

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

Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment Dual-Mode Hybrid/Two-Mode Hybrid Accomplishment DOE-funded research, in collaboration with Allison Buses and General Motors Corporation has led to the commercialization of a dramatically different hybrid transmission system for heavy-duty and light-duty applications. The Dual-Mode or Two-Mode hybrid system is an infinitely variable speed hybrid transmission that works with the engine and battery system and automatically chooses to operate in a parallel or series hybrid path to maximize efficiency and minimize emissions, fuel consumption and noise. Parallel and Series hybrid configurations are found on most hybrid vehicles today, both with their own pluses and minuses. The Dual- Mode/Two-Mode systems uses the positive characteristics from both systems to maximize fuel

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Potential use of hollow spheres in dual gradient drilling  

E-Print Network (OSTI)

The increasing number of significant deepwater discoveries has pushed the operator and service oil companies to focus their efforts on developing new technologies to drill in deeper water. Dual gradient drilling (DGD) will allow reaching deeper...

Vera Vera, Liliana

2012-06-07T23:59:59.000Z

102

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

103

Lean NOx Reduction with Dual Layer LNT/SCR Catalysts  

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

Results show that a series of dual layer catalysts with a bottom layer of LNT catalyst and a top layer of SCR catalyst can carry out coupled ammonia generation and NOx reduction, achieving high NOx conversion with minimal ammonia slip

104

Primal-dual coding to probe light transport  

E-Print Network (OSTI)

We present primal-dual coding, a photography technique that enables direct fine-grain control over which light paths contribute to a photo. We achieve this by projecting a sequence of patterns onto the scene while the ...

O'Toole, Matthew

105

Optimization of a dual acting, magnetically driven, linear actuator  

E-Print Network (OSTI)

In this study the geometry of a dual acting, magnetically driven, linear motion actuator will be optimized. This will be accomplished by modeling the system through a set of differential equations to be solved in Matlab. An ANSYS finite element...

Willerton, Justin Ryan

2012-06-07T23:59:59.000Z

106

EIS-0228: Dual Axis Radiographic Hydrodynamic Test (DARHT) Facility  

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

This EIS evaluates the potential environmental impact of a proposal to construct and operate the Dual Axis Radiographic Hydrodynamic Test (DARHT) facility at Los Alamos National Laboratory (LANL)...

107

Simulation of biomass gasification in a dual fluidized bed gasifier  

Science Journals Connector (OSTI)

Biomass gasification with steam in a dual-fluidized bed gasifier (DFBG) was simulated with ASPEN Plus. ... that the content of char transferred from the gasifier to the combustor decreases from 22.5...2 concentra...

Jie He; Kristina Göransson; Ulf Söderlind…

2012-03-01T23:59:59.000Z

108

Economizer Applications in Dual-Duct Air-Handling Units  

E-Print Network (OSTI)

This paper provides analytical tools and engineering methods to evaluate the feasibility of the economizer for dual-duct air-handling units. The results show that the economizer decreases cooling energy consumption without heating energy penalties...

Joo, I.; Liu, M.

2002-01-01T23:59:59.000Z

109

Recovery of primal solution in dual subgradient schemes  

E-Print Network (OSTI)

In this thesis, we study primal solutions for general optimization problems. In particular, we employ the subgradient method to solve the Lagrangian dual of a convex constrained problem, and use a primal-averaging scheme ...

Ma, Jing, S.M. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

110

Dual Models of Permutation Problems Barbara M. Smith  

E-Print Network (OSTI)

Dual Models of Permutation Problems Barbara M. Smith School of Computing & Mathematics University of Huddersfield Huddersfield HD1 3DH, U.K. b.m.smith@hud.ac.uk Abstract. A constraint satisfaction problem

Smith, Barbara M.

111

CONVERGENCE RATE ANALYSIS OF PRIMAL-DUAL SPLITTING ...  

E-Print Network (OSTI)

Abstract. Primal-dual splitting schemes are a class of powerful algorithms ... this paper, we are mainly concerned with the line of work that began in [38, 14, 23].

2014-08-19T23:59:59.000Z

112

Alternative Fuels Data Center: Idaho National Laboratory Dual...  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

890-square-mile site. The fleet reduces the number of passenger vehicle miles, and their carbon emissions, and increases passenger safety during bad weather. The dual-fuel...

113

The Philosophy and Feasibility of Dual Readout Calorimetry  

SciTech Connect

I will discuss the general physical ideas behind dual-readout calorimetry, their implementation in DREAM (Dual REAdout Module) with exact separation of scintillation and Cerenkov light, implementation with mixed light in DREAM fibers, anticipated implementation in PbWO4 crystals with applications to the 4th Concept detector and to CMS, use in high energy gamma-ray and cosmic ray astrophysics with Cerenkov and N2 fluorescent light, and implementation in the 4th Concept detector for muon identification.

Hauptman, John [Physics, Iowa State University, Ames IA 50011 (United States)

2006-10-27T23:59:59.000Z

114

Fuel cell having dual electrode anode or cathode  

DOE Patents (OSTI)

A fuel cell that is characterized by including a dual electrode anode that is operable to simultaneously electro-oxidize a gaseous fuel and a liquid fuel. In alternative embodiments, a fuel cell having a single electrode anode is provided with a dual electrode cathode that is operable to simultaneously reduce a gaseous oxidant and a liquid oxidant to electro-oxidize a fuel supplied to the cell.

Findl, E.

1984-04-10T23:59:59.000Z

115

The holographic dual of an EPR pair has a wormhole  

E-Print Network (OSTI)

We construct the holographic dual of two colored quasiparticles in maximally supersymmetric Yang-Mills theory entangled in a color singlet EPR pair. In the holographic dual the entanglement is encoded in a geometry of a non-traversable wormhole on the worldsheet of the flux tube connecting the pair. This gives a simple example supporting the recent claim by Maldacena and Susskind that EPR pairs and non-traversable wormholes are equivalent descriptions of the same physics.

Jensen, Kristan

2013-01-01T23:59:59.000Z

116

Fuel cell having dual electrode anode or cathode  

DOE Patents (OSTI)

A fuel cell that is characterized by including a dual electrode anode that is operable to simultaneously electro-oxidize a gaseous fuel and a liquid fuel. In alternative embodiments, a fuel cell having a single electrode anode is provided with a dual electrode cathode that is operable to simultaneously reduce a gaseous oxidant and a liquid oxidant to electro-oxidize a fuel supplied to the cell.

Findl, Eugene (Coram, NY)

1985-01-01T23:59:59.000Z

117

Dual excitation acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in geological formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleons present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be performed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described. 6 figs.

Vail, W.B. III.

1989-02-14T23:59:59.000Z

118

Dual excitation acoustic paramagnetic logging tool  

DOE Patents (OSTI)

New methods and apparatus are disclosed which allow measurement of the presence of oil and water in gelogical formations using a new physical effect called the Acoustic Paramagnetic Logging Effect (APLE). The presence of petroleum in formation causes a slight increase in the earth's magnetic field in the vicinity of the reservoir. This is the phenomena of paramagnetism. Application of an acoustic source to a geological formation at the Larmor frequency of the nucleous present causes the paramagnetism of the formation to disappear. This results in a decrease in the earth's magnetic field in the vicinity of the oil bearing formation. Repetitively frequency sweeping the acoustic source through the Larmor frequency of the nucleons present (approx. 2 kHz) causes an amplitude modulation of the earth's magnetic field which is a consequence of the APLE. The amplitude modulation of the earth's magnetic field is measured with an induction coil gradiometer and provides a direct measure of the amount of oil and water in the excitation zone of the formation. The phase of the signal is used to infer the longitudinal relaxation times of the fluids present, which results in the ability in general to separate oil and water and to measure the viscosity of the oil present. Such measurements may be preformed in open boreholes and in cased well bores. The Dual Excitation Acoustic Paramagnetic Logging Tool employing two acoustic sources is also described.

Vail, III, William B. (Bothell, WA)

1989-01-01T23:59:59.000Z

119

The Chern-Simons term in a dual Josephson junction  

E-Print Network (OSTI)

A dual Josephson junction corresponding to a (2+1)-dimensional non-superconducting layer sandwiched between two (3+1)-dimensional dual superconducting regions constitutes a model of localization of a U(1) gauge field within the layer. Monopole tunneling currents flow from one dual superconducting region to another due to a phase difference between the wave functions of the monopole condensate below and above the non-superconducting layer. These magnetic currents appear within the (2+1)-dimensional layer as a gas of magnetic instanton events and a weak electric charge confinement is expected to take place at very long distances within the layer. In the present work, we consider what happens when one introduces fermions in this physical scenario. Due to the dual Meissner effect featured in the dual superconducting bulk, it is argued that unconfined fermions would be localized within the (2+1)-dimensional layer, where their quantum fluctuations radiatively induce a Chern-Simons term, which is known to destroy th...

Grigorio, L S; Rougemont, R; Wotzasek, C; Zarro, C A D

2013-01-01T23:59:59.000Z

120

The Chern-Simons term in a dual Josephson junction  

E-Print Network (OSTI)

A dual Josephson junction corresponding to a (2+1)-dimensional non-superconducting layer sandwiched between two (3+1)-dimensional dual superconducting regions constitutes a model of localization of a U(1) gauge field within the layer. Monopole tunneling currents flow from one dual superconducting region to another due to a phase difference between the wave functions of the monopole condensate below and above the non-superconducting layer when there is an electromagnetic field within the layer. These magnetic currents appear within the (2+1)-dimensional layer as a gas of magnetic instanton events and a weak electric charge confinement is expected to take place at very long distances within the layer. In the present work, we consider what happens when one introduces fermions in this physical scenario. Due to the dual Meissner effect featured in the dual superconducting bulk, it is argued that unconfined fermions would be localized within the (2+1)-dimensional layer, where their quantum fluctuations radiatively induce a Chern-Simons term, which is known to destroy the electric charge confinement and to promote the confinement of the magnetic instantons.

L. S. Grigorio; M. S. Guimaraes; R. Rougemont; C. Wotzasek; C. A. D. Zarro

2013-08-27T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Approval Process for Dual Compensation Waivers for Reemployed Annuitants  

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

10 10 MEMORANDUM FOR HUMAN RESOURCE DIRECTORS ~~~ - FROM: SARAH J. NILLA, DIRECTOR OFFICE 0 UMAN CAPITAL MANAGEMENT SUBJECT: POLICY MEMORANDUM # 11: APPROVAL PROCESS FOR DUAL COMPENSATION WAIVERS FOR REEMPLOYED ANNUITANTS Section 1122 of the National Defense Authorization Act for Fiscal Year 2010, Public Law 111-84 (Pub. L 111-84) allows the head of an agency to grant dual compensation (salary-offset) waivers to reemployed annuitants who work on a limited basis without reduction to their retirement annuity. This provision in the law expires October 27, 2014. Secretary Chu has delegated the authority to approve all dual compensation waiver requests to the Department's Chief Human Capital Officer (CHCO). This authority can be used to: a) Fulfill functions critical to the mission of the agency (or any subcomponent of

122

ROCKY MOUNTAIN OILFIELD TESTING CENTER Texaco Dual Action Pumping System  

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

Texaco Dual Action Pumping System Texaco Dual Action Pumping System PROJECT TEST RESULTS March 16, 1998 Michael R. Tyler Project Manager Abstract The Texaco Dual Action Pumping System (DAPS) is designed to separate water from the oil in the casing-tubing annulas and inject most of the water into a lower formation while lifting the oil and remaining water to the surface. As oil production declines in a well the water production can increase. The lifting cost can be reduced per barrel of oil if less water is brought to the surface and processed. The DAPS was installed in a well that had been producing four (4) barrels of oil per day (bopd) and 46 barrels of water per day (bwpd), from the zone that became the injection zone. The well was recompleted in a shallower zone that was expected to yield an excessive quantity of

123

Using dual decomposition for solving problems involving data uncertainty |  

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

dual decomposition for solving problems involving data uncertainty dual decomposition for solving problems involving data uncertainty August 14, 2013 Tweet EmailPrint Many applications mdash; energy, routing, scheduling, and production planning, for example mdash; involve problems in which some or all of the data may not be known when decisions under uncertainty must be made. In such cases, approximations with stochastic mixed-integer programming models are often used. Two approaches have been suggested to address such problems: dual decomposition (DD) and branch-and-price (BP). Both approaches divide the problem into two or more subproblems, together with linear constraints that enforce agreement between solutions to the different problems through a series of iterations. Unfortunately, both approaches also suffer from lack

124

Study of a dual frequency atmospheric pressure corona plasma  

Science Journals Connector (OSTI)

Radio frequency mixing of 2 and 13.56 MHz was investigated by performing experimental measurements on the atmospheric pressurecoronaplasma. As a result of the dual frequency length current density and electron excitation temperature of the plasma were increased while the gas temperature was maintained at roughly the same level when compared to the respective single frequency plasmas. Moreover observation of time-resolvedimages revealed that the dual frequency plasma has a discharge mode of 2 MHz positive streamer 2 MHz negative glow and 13.56 MHz continuous glow.

Dan Bee Kim; S. Y. Moon; H. Jung; B. Gweon; Wonho Choe

2010-01-01T23:59:59.000Z

125

Dual radio frequency plasma source: Understanding via electrical asymmetry effect  

SciTech Connect

On the basis of the global model, the influences of driving voltage and frequency on electron heating in geometrically symmetrical dual capacitively coupled radio frequency plasma have been investigated. Consistent with the experimental and simulation results, non-monotonic behavior of dc self bias and plasma heating with increasing high frequency is observed. In addition to the local maxima of plasma parameters for the integer values of the ratio between the frequencies ({xi}), ourstudies also predict local maxima for odd integer values of 2{xi} as a consequence of the electrical asymmetry effect produced by dual frequency voltage sources.

Bora, B. [Departamento de Plasma Termonuclear, Comision Chilena de Energia Nuclear (CCHEN), Casilla 188-D, Santiago (Chile); Departamento de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile); Bhuyan, H.; Favre, M.; Wyndham, E. [Departamento de Fisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile); Wong, C. S. [Plasma Technology Research Centre, Physics Department, Faculty of Science, University of Malaya, 50603 Kuala Lumpur (Malaysia)

2013-04-21T23:59:59.000Z

126

Study of a dual frequency atmospheric pressure corona plasma  

SciTech Connect

Radio frequency mixing of 2 and 13.56 MHz was investigated by performing experimental measurements on the atmospheric pressure corona plasma. As a result of the dual frequency, length, current density, and electron excitation temperature of the plasma were increased, while the gas temperature was maintained at roughly the same level when compared to the respective single frequency plasmas. Moreover, observation of time-resolved images revealed that the dual frequency plasma has a discharge mode of 2 MHz positive streamer, 2 MHz negative glow, and 13.56 MHz continuous glow.

Kim, Dan Bee; Moon, S. Y.; Jung, H.; Gweon, B.; Choe, Wonho [Department of Physics, Korea Advanced Institute of Science and Technology, 335 Gwahangno, Yuseong-gu, Daejeon 305-701 (Korea, Republic of)

2010-05-15T23:59:59.000Z

127

Dual design resistor for high voltage conditioning and transmission lines  

DOE Patents (OSTI)

A dual resistor for eliminating the requirement for two different value resistors. The dual resistor includes a conditioning resistor at a high resistance value and a run resistor at a low resistance value. The run resistor can travel inside the conditioning resistor. The run resistor is capable of being advanced by a drive assembly until an electrical path is completed through the run resistor thereby shorting out the conditioning resistor and allowing the lower resistance run resistor to take over as the current carrier.

Siggins, Timothy Lynn (Newport News, VA); Murray, Charles W. (Hayes, VA); Walker, Richard L. (Norfolk, VA)

2007-01-23T23:59:59.000Z

128

Photo of the Week: The First Energy-Efficient Dual-Paned Windows...  

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

Photo of the Week: The First Energy-Efficient Dual-Paned Windows Photo of the Week: The First Energy-Efficient Dual-Paned Windows December 5, 2013 - 12:53pm Addthis Researchers at...

129

Solution of symmetry equation and hierarchy of self dual Yang-Mills systems  

E-Print Network (OSTI)

The solution of symmetry equation of Yang-Mills self dual system is found in explicit form of its raising Hamiltonian operator. Thus explicit form of equations of self dual Yang Mills hierarchy is constructed.

A. N. Leznov

2008-02-11T23:59:59.000Z

130

E-Print Network 3.0 - alters dual-species biofilm Sample Search...  

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

for: alters dual-species biofilm Page: << < 1 2 3 4 5 > >> 1 APPLIED AND ENVIRONMENTAL MICROBIOLOGY, 0099-22400004.00 0 Summary: in a Dual-Species Biofilm Exposed to Mixed...

131

Variable Speed Drive (VSD) Applications in Dual-Duct Constant Volume Systems  

E-Print Network (OSTI)

Models have been developed for static pressure and potential supply fan energy savings by using variable speed drive (VSD) in dual-duct constant volume systems. Experiments have been performed using a full size dual-duct constant volume system...

Joo, I.; Liu, M.; Conger, K.; Wang, G.

2002-01-01T23:59:59.000Z

132

Low and high Temperature Dual Thermoelectric Generation Waste Heat Recovery System for Light-Duty Vehicles  

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

Developing a low and high temperature dual thermoelectric generation waste heat recovery system for light-duty vehicles.

133

An Evaluation of the Impacts of Network Bandwidth and Dual-Core Processors on  

E-Print Network (OSTI)

and scaling on a large-scale dual-core system. We provide results for multiple representative DOE applicationsAn Evaluation of the Impacts of Network Bandwidth and Dual-Core Processors on Scalability Ron hardware. Single-core 2.0 GHz AMD Opteron pro- cessors were replaced with dual-core 2.4 GHz AMD Opterons

Brightwell, Ron

134

A Dual-Armed Robotic System for Intraoperative Ultrasound Guided Hepatic Ablative Therapy:A  

E-Print Network (OSTI)

A Dual-Armed Robotic System for Intraoperative Ultrasound Guided Hepatic Ablative Therapy, we propose the use of a dual robotic arm system that manages both ultrasound manipulation and needle guidance. We report a prototype of the dual arm system and a comparative performance analysis between

Camesano, Terri

135

Contrast limitations of dual electrochromic systems J. Padilla *, T.F. Otero *  

E-Print Network (OSTI)

Contrast limitations of dual electrochromic systems J. Padilla *, T.F. Otero * Center characterize any combination of a dual electrochromic system as a function of the redox charge of its reserved. Keywords: Conducting polymer; Electrochromism; Maximum contrast; Dual system; PEDOT; ProDOT 1

Otero, Toribio Fernández

136

Dual formulation of the utility maximization problem : the case of nonsmooth utility  

E-Print Network (OSTI)

, finitely valued on the whole real line, we study the dual formulation of the utility maximization problemDual formulation of the utility maximization problem : the case of nonsmooth utility B. Bouchard the dual formulation of the utility maximization problem in incomplete markets when the utility function

Touzi, Nizar

137

Laboratory Evaluation of a Dual Rapid Immunodiagnostic Test for HIV and Syphilis Infection  

Science Journals Connector (OSTI)

...Evaluation of a Dual Rapid Immunodiagnostic Test for HIV and Syphilis Infection Claire C...Angeles, Los Angeles CA, USA New dual tests for HIV and syphilis have been developed...performance of a dual rapid immunodiagnostic test for HIV and syphilis. Our evaluation showed...

Claire C. Bristow; Segundo R. Leon; Lourdes B. Ramos; Silver K. Vargas; Juan A. Flores; Kelika A. Konda; Carlos F. Caceres; Jeffrey D. Klausner

2014-11-05T23:59:59.000Z

138

Dual-Process Theory and Signal-Detection Theory of Recognition Memory John T. Wixted  

E-Print Network (OSTI)

-detection theory. A dual-process version of signal-detection theory implies that individual recognition decisions. One view--the dual-process theory of recognition memory--holds that recogni- tion decisions are basedDual-Process Theory and Signal-Detection Theory of Recognition Memory John T. Wixted University

Wixted, John T.

139

Operator Systems: Quotients, Duals and Tensors with Applications to Connes' Embedding  

E-Print Network (OSTI)

Operator Systems: Quotients, Duals and Tensors with Applications to Connes' Embedding Conjecture and Mark Tomforde Banff, Alberta February, 2012 Vern Paulsen Operator Systems: Quotients, Duals and Tensors are the completely bounded maps. Vern Paulsen Operator Systems: Quotients, Duals and Tensors with Applicat #12

Argerami, Martin

140

LM13700/LM13700A Dual Operational Transconductance Amplifiers with  

E-Print Network (OSTI)

LM13700/LM13700A Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers General Description The LM13700 series consists of two current controlled transconductance amplifiers of the amplifiers. The output buffers of the LM13700 differ from those of the LM13600 in that their input bias

Lanterman, Aaron

Note: This page contains sample records for the topic "4-valve dual overhead" 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

LM119/LM219/LM319 High Speed Dual Comparator  

E-Print Network (OSTI)

LM119/LM219/LM319 High Speed Dual Comparator General Description The LM119 series are precision higher gain and lower input currents than devices like the LM710. The uncommitted collector of the output stage makes the LM119 compatible with RTL, DTL and TTL as well as capable of driving lamps and relays

Lanterman, Aaron

142

Dual aperture dipole magnet with second harmonic component  

DOE Patents (OSTI)

An improved dual aperture dipole electromagnet includes a second-harmonic frequency magnetic guide field winding which surrounds first harmonic frequency magnetic guide field windings associated with each aperture. The second harmonic winding and the first harmonic windings cooperate to produce resultant magnetic waveforms in the apertures which have extended acceleration and shortened reset portions of electromagnet operation.

Praeg, W.F.

1983-08-31T23:59:59.000Z

143

A Knowledge Management Support Environment based on Dual Loop Model  

E-Print Network (OSTI)

A Knowledge Management Support Environment based on Dual Loop Model Mitsuru Ikeda, Yusuke Hayashi individuals and organizations be properly understood and support learning for knowledge inheritance, and encourage the creation, the spreading and inheriting of new knowledge. This paper presents an framework

Mizoguchi, Riichiro

144

Dual Polarized And Balanced Receivers At Millimeter And Submillimeter  

E-Print Network (OSTI)

is dedicated to my parents. #12;iv Acknowledgments First and foremost, I would like to express my heartiest, soccer, tennis, racket ball, and badminton. Finally, I thank my parents, my brother and sisters of strength and inspiration, and without whom I would have lost my way. #12;vi Dual Polarized and Balanced

Chattopadhyay, Goutam

145

Dual periodicities in the rotational modulation of Saturn narrowband emissions  

E-Print Network (OSTI)

Dual periodicities in the rotational modulation of Saturn narrowband emissions S.Y. Ye,1 D. A emissions is examined, restricting the spacecraft location to either the northern or the southern hemisphere of Saturn. It is found that in both hemispheres, the modulation period of 5 kHz narrowband emissions has two

Gurnett, Donald A.

146

EXPERIMENTAL RESULTS ON DUAL-UEGO ACTIVE CATALYST CONTROL  

E-Print Network (OSTI)

EXPERIMENTAL RESULTS ON DUAL-UEGO ACTIVE CATALYST CONTROL Giovanni Fiengo Jessy W. Grizzle ignition engine equipped with a three-way catalyst and pre- and post-catalyst oxygen sensors. The control hydrocarbons. Linear exhaust gas oxygen sensors are used to measure pre- and post-catalyst air-fuel ratio

Grizzle, Jessy W.

147

SMITH INVARIANTS AND DUAL GRADED GRAPHS ALEXANDER MILLER  

E-Print Network (OSTI)

SMITH INVARIANTS AND DUAL GRADED GRAPHS ALEXANDER MILLER Abstract. The aim of this paper the Smith invariants immediately, as the eigenvalues are completely understood [3, 15]. Furthermore, we. Background 1 1.1. Differential posets 1 1.2. Eigenvalues 3 1.3. Smith invariants 3 2. Conjecture for r

Weinberger, Hans

148

Petrov type I Condition and Dual Fluid Dynamics  

E-Print Network (OSTI)

Recently Lysov and Strominger [arXiv:1104.5502] showed that imposing Petrov type I condition on a $(p+1)$-dimensional timelike hypersurface embedded in a $(p+2)$-dimensional vacuum Einstein gravity reduces the degrees of freedom in the extrinsic curvature of the hypersurface to that of a fluid on the hypersurface, and that the leading-order Einstein constraint equations in terms of the mean curvature of the embedding give the incompressible Navier-Stokes equations of the dual fluid. In this paper we show that the non-relativistic fluid dual to vacuum Einstein gravity does not satisfy the Petrov type I condition at next order, unless additional constraint such as the irrotational condition is added. In addition, we show that this procedure can be inversed to derive the non-relativistic hydrodynamics with higher order corrections through imposing the Petrov type I condition, and that some second order transport coefficients can be extracted, but the dual "Petrov type I fluid" does not match the dual fluid constructed from the geometry of vacuum Einstein gravity in the non-relativistic limit. We discuss the procedure both on the finite cutoff surface via the non-relativistic hydrodynamic expansion and on the highly accelerated surface via the near horizon expansion.

Rong-Gen Cai; Li Li; Qing Yang; Yun-Long Zhang

2014-03-17T23:59:59.000Z

149

Energy performance of a dual airflow window under different climates  

Science Journals Connector (OSTI)

Ventilated windows have shown great potential in conserving energy in buildings and provide fresh air to improve indoor air quality. This paper reports our effort to use EnergyPlus to simulate the energy performance of a dual airflow window under different climates. Our investigation first developed a network model to account for the two-dimensional heat transfer in the window system and implemented it in EnergyPlus. The two-dimensional assumption and the modified EnergyPlus program were validated by the measured temperatures of the window and the energy demand of a test cell with the window under actual weather conditions. Then EnergyPlus was applied to analyze energy performance of a small apartment installed with the dual airflow windows in five different climate zones in China. The energy used by the apartment with blinds windows and low-e windows was also calculated for comparison. The dual airflow window can reduce heating energy of the apartment, especially in cold climate. The cooling energy reduction by the window was less important than that by shading solar radiation. The dual airflow window is recommended for colder climate. If improving air quality is a major consideration for a building, the window can be used in any climate.

Jingshu Wei; Jianing Zhao; Qingyan Chen

2010-01-01T23:59:59.000Z

150

Compact Wideband Dual-Polarized Microstrip Patch Antenna  

E-Print Network (OSTI)

Compact Wideband Dual-Polarized Microstrip Patch Antenna K. Rambabu*, M. Alam, J. Bornemann and M for microstrip patch antennas. There are numerous methods to couple multiple resonances. Examples include coupled patches [1], patches with slots (e.g. U- and E-shaped) [2], [3], stacked patches [4], and patches

Bornemann, Jens

151

Geometric Structure of Two Self-dual Fields with Constraints  

E-Print Network (OSTI)

A two dimensional Poincar$\\acute{e}$-invariant self-dual field with constraints is studied in geometric way. We obtained its symplectic structure and conservative currents on space of solutions, which are also invariant under transformations of Poincar$\\acute{e}$ group.

Xurong Chen

2007-11-18T23:59:59.000Z

152

Development of dual technology roadmap (TRM) for open innovation: Structure and typology  

Science Journals Connector (OSTI)

Abstract Today, innovation is no longer viewed as taking place within a single firm – but opening up the innovation process is still not a simple task. In open innovation, the mechanisms of incorporating external resources into the development process need to be carefully managed. This paper suggests a dual technology roadmap (TRM) that considers both internal and external firms. First, we introduce the concept of a dual TRM that considers partner resources as well as internal resources. Second, we suggest the structure of a dual TRM that uses dual planning objects. Third, three types of dual TRM are suggested, with three case examples.

Youngjung Geum; Jiyoung Kim; Changho Son; Yongtae Park

2013-01-01T23:59:59.000Z

153

Oscillating Strings and Non-Abelian T-dual Klebanov-Witten Background  

E-Print Network (OSTI)

We study oscillating string solutions in the Klebanov-Witten and its non-Abelian T-dual background dualised along an SU(2) isometry. We find the string energy as the function of oscillation number and angular momentum. We show that for a particular set of T-dual co-ordinates both the background have equal string states. We also study the string states where the strings are expanding and contracting in the T-dual co-ordinate direction. We expect the presence of the superconformal field theory dual operators whose anomalous dimensions depend on T-dual co-ordinate.

Pradhan, Pabitra M

2014-01-01T23:59:59.000Z

154

Oscillating Strings and Non-Abelian T-dual Klebanov-Witten Background  

E-Print Network (OSTI)

We study oscillating string solutions in the Klebanov-Witten and its non-Abelian T-dual background dualised along an SU(2) isometry. We find the string energy as the function of oscillation number and angular momentum. We show that for a particular set of T-dual co-ordinates both the background have equal string states. We also study the string states where the strings are expanding and contracting in the T-dual co-ordinate direction. We expect the presence of the superconformal field theory dual operators whose anomalous dimensions depend on T-dual co-ordinate.

Pabitra M. Pradhan

2014-06-09T23:59:59.000Z

155

A dual mass flux framework for boundary layer convection  

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

A dual mass flux framework for boundary layer convection A dual mass flux framework for boundary layer convection Neggers, Roel European Centre for Medium-range Weather Forecasts (ECMWF) Category: Modeling A new convective boundary layer scheme is presented that is currently being developed for the Integrated Forecasting System (IFS) of the European Centre for Medium-range Weather Forecasts (ECMWF). Part of the total turbulent flux is modeled through advective mass flux by multiple updrafts, initialized at the surface. Two groups of updrafts are explicitly represented; i) updrafts that never reach their lifting condensation level, and ii) updrafts that condensate and become cloudy. Key new ingredient is the flexibility of the associated updraft area fractions, as a function of model state. As a result, an extra degree of freedom is introduced in the

156

Dual fuel development for an LNG marine engine  

SciTech Connect

A dual-fuel conversion for the 3406-B Caterpillar marine diesel engine has been developed. The purpose of this conversion is to use lower priced natural gas as a fuel, thus providing substantial cost savings for large fuel consumers. Details of the conversion system are given. Data is presented showing fuel consumption, conditions leading to engine knock, conditions promoting methane flame propagation, and air-fuel ratios required for efficient combustion. The system resulting from this study will use Liquefied Natural Gas (LNG) to power a dual-fuel conversion of a shrimp boat's main engine and generator set. The cold temperatures of the LNG will also be used as a heat sink to refrigerate the fish-hold area of the boat.

Acker, G.H.

1988-01-01T23:59:59.000Z

157

Combined Numerical-experimental Study of Dual Fuel Diesel Engine  

Science Journals Connector (OSTI)

Abstract In the present paper the authors discuss the effect of different fuel ratios on the performance and emission levels of a common rail diesel engine supplied with natural gas and diesel oil. Dual fuel operation is characterized by a diesel pilot injection to start combustion in an intake port premixed NG/air mixture. The combined numerical – experimental study of the dual fuel diesel engine that is carried out in this paper aims at the evaluation of the CFD potential to predict the main features of this particular engine operation. The experimental investigations represent a tool for validating such a potential and for highlighting, at the same time, the major problems that arise from the actual engine operation with different NG / diesel oil fuel ratios.

Carmelina Abagnale; Maria Cristina Cameretti; Luigi De Simio; Michele Gambino; Sabatino Iannaccone; Raffaele Tuccillo

2014-01-01T23:59:59.000Z

158

Plane-parallel waves as duals of the flat background  

E-Print Network (OSTI)

We give a classification of non-Abelian T-duals of the flat metric in D=4 dimensions with respect to the four-dimensional continuous subgroups of the Poincare group. After dualizing the flat background, we identify majority of dual models as conformal sigma models in plane-parallel wave backgrounds, most of them having torsion. We give their form in Brinkmann coordinates. We find, besides the plane-parallel waves, several diagonalizable curved metrics with nontrivial scalar curvature and torsion. Using the non-Abelian T-duality, we find general solution of the classical field equations for all the sigma models in terms of d'Alembert solutions of the wave equation.

Ladislav Hlavaty; Ivo Petr

2014-12-03T23:59:59.000Z

159

String Gas Shells, their Dual Radiation and Hedgehog Signature Control  

E-Print Network (OSTI)

We search for spherically symmetric, stationary solutions with a string gas shell as a source. The requirement of a uniform newtonian potential, or constancy of the 00 component of the metric, implies the existence of a "dual" radiation, which we argue can be interpreted as representing the virtual quantum fluctuations that stabilize the shell. A string hedgehog can be introduced also into the solution. For zero or small hedgehog strength the string gas shell is of a regular nature, while the dual radiation is of a spacelike nature. For higher hedgehog strengths however the radiation "materializes" and becomes timelike while the string gas shell becomes space like. The significance of these solutions for the quantum theory is discussed.

E. I. Guendelman

2009-03-12T23:59:59.000Z

160

Gravity Duals of Lifshitz-Like Fixed Points  

SciTech Connect

We find candidate macroscopic gravity duals for scale-invariant but non-Lorentz invariant fixed points, which do not have particle number as a conserved quantity. We compute two-point correlation functions which exhibit novel behavior relative to their AdS counterparts, and find holographic renormalization group flows to conformal field theories. Our theories are characterized by a dynamical critical exponent z, which governs the anisotropy between spatial and temporal scaling t {yields} {lambda}{sup z}t, x {yields} {lambda}x; we focus on the case with z = 2. Such theories describe multicritical points in certain magnetic materials and liquid crystals, and have been shown to arise at quantum critical points in toy models of the cuprate superconductors. This work can be considered a small step towards making useful dual descriptions of such critical points.

Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC; Liu, Xiao; /Perimeter Inst. Theor. Phys.; Mulligan, Michael; /Stanford U., Phys. Dept. /SLAC

2008-11-05T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Subsidiary Conditions and Ghosts in Dual-Resonance Models  

Science Journals Connector (OSTI)

We investigate the possible subsidiary conditions compatible with the equations of motion of dual-resonance models for the unrealistic choice of ?(0)=1. In the language of four-dimensional harmonic oscillators, we find one subsidiary condition for each mode of oscillation. All time components (in the c.m. system) can therefore be eliminated. We discuss the possibility of relaxing the condition ?(0)=1.

M. A. Virasoro

1970-05-15T23:59:59.000Z

162

Advanced regenerator testing in the Raytheon dual-use cryocoolerr  

SciTech Connect

Significant progress has been made on the Raytheon low cost space cryocooler called the Dual-Use Cryocooler (DUC). Most notably, the DUC has been integrated and tested with an advanced regenerator. The advanced regenerator is a drop-in replacement for stainless steel screens and has shown significant thermodynamic performance improvements. This paper will compare the performance of two different regenerators and explain the benefits of the advanced regenerator.

Schaefer, B. R.; Bellis, L.; Ellis, M. J.; Conrad, T. J. [Raytheon Space and Airborne Systems 2000 E. El Segundo Blvd., El Segundo, CA 90245 (United States)

2014-01-29T23:59:59.000Z

163

Self-Dual Maps and Symmetric Bistochastic Matrices  

E-Print Network (OSTI)

The H-unistochastic matrices are a special class of symmetric bistochastic matrices obtained by taking the square of the absolute value of each entry of a Hermitian unitary matrix. We examine the geometric relationship of the convex hull of the n by n H-unistochastic matrices relative to the larger convex set of n by n symmetric bistochastic matrices. We show that any line segment in the convex set of the n by n symmetric bistochastic matrices which passes through the centroid of this convex set must spend at least two-thirds of its length in the convex hull of the n by n H-unistochastic matrices when n is either three or four and we prove a partial result for higher n. A class of completely positive linear maps called the self-dual doubly stochastic maps is useful for studying this problem. Some results on self-dual doubly stochastic maps are given including a self-dual version of the Laudau-Streater theorem.

Corey O'Meara; Rajesh Pereira

2012-11-13T23:59:59.000Z

164

Performance and emissions of a dual fuel operated diesel engine  

Science Journals Connector (OSTI)

Vegetable oil and its esters (biodiesel) are the renewable alternative fuels that can be used as a substitute for diesel in the diesel engines. The vegetable oil fuelled diesel engine results in lower efficiency and higher smoke emission. Hence in this work, an attempt has been made to use inedible and under utilised mahua oil (MO) as a substitute for diesel by fumigating liquefied petroleum gas (LPG) along with the air. A single cylinder diesel engine was modified to work in dual fuel mode by suitable retrofitting. The MO was injected into the cylinder using a fuel pump and LPG was fumigated along with the air. In MO + LPG dual fuel mode, 9% increase in brake thermal efficiency and 35% reduction in smoke emission of the engine were observed as compared to the sole fuel mode with MO. Also, the engine performance characteristics in MO + LPG dual fuel mode are close to sole fuel mode with diesel. From this work, it is concluded that LPG can be fumigated along with the air to increase the performance of MO fuelled agricultural diesel engine.

N. Kapilan; R.P. Reddy

2012-01-01T23:59:59.000Z

165

NETL: Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic  

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

Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic Carbonate Membrane Reactor Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic Carbonate Membrane Reactor Project No.: DE-FE0000470 Arizona State University is developing a dual-phase, membrane-based separation device which will separate carbon dioxide (CO2) from typical water gas shift (WGS) mixture feeds and produce hydrogen, which can be introduced into the combustion turbines of integrated gasification combined cycle (IGCC) plants. The objectives of the project are experimental studies of the synthesis of a high-temperature, chemically and thermally stable and CO2 perm-selective dual-phase membrane and its use as a membrane reactor for WGS reaction to produce H2 and CO2 rich streams. Concept of ceramic-carbonate dual phase membranes for CO2 separation. Concept of ceramic-carbonate dual phase membranes for CO2 separation.

166

Feasibility of the design of dual-lane ramp meters in Texas  

E-Print Network (OSTI)

Of Single- And Dual-Lane Ramp Meters . . . . . . . . . . . . . Microscopic Simulation Analysis Of Traffic Control And Operational Characteristics . 58 60 61 63 65 65 66 V STUDY RESULTS . . . 72 Gessner Street/Katy Freeway Single-Lane Ramp Meter... . . . . . . 108 APPENDIX A DUAL-LANE RAMP METER SURVEY AND MAILING LIST . . . . . . 112 APPENDIX B MAY 1997 QUEUE AND DEMAND VOLUME DATA FOR THE GESSNER STREET/KATY FREEWAY SINGLE-LANE RAMP . . . . 120 APPENDIX C PROPOSED GESSNER STREET/KATY FREEWAY DUAL...

Butorac, Marc Allen

2012-06-07T23:59:59.000Z

167

Development of Dual-Fuel Engine for Class 8 Applications | Department...  

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

Class 8 Applications Development of Dual-Fuel Engine for Class 8 Applications Highlights roadmap towards 55% brake thermal efficiency and progress to meet engine development goals...

168

Dual Fuel Conversion System for Diesel Engines: Inventions and Innovation Project Fact Sheet  

SciTech Connect

Project fact sheet written for the Inventions and Innovation Program about a new dual fuel conversion system allows diesel fuel switching with clean burning natural gas.

Wogsland, J.

2001-01-25T23:59:59.000Z

169

Design and Analysis of a Mach 3 Dual Mode Scramjet Combustor.  

E-Print Network (OSTI)

??Low speed operation of a dual mode scramjet engine is important to the development of a two stage to orbit reusable launch vehicle. This study… (more)

Corbin, Christopher Ryan

2008-01-01T23:59:59.000Z

170

A SAFEGUARDED DUAL WEIGHTED RESIDUAL METHOD RICARDO H. NOCHETTO, ANDREAS VEESER, AND MARCO VERANI  

E-Print Network (OSTI)

A SAFEGUARDED DUAL WEIGHTED RESIDUAL METHOD RICARDO H. NOCHETTO, ANDREAS VEESER, AND MARCO VERANI safeguarded by additional asymptotically higher order a posteriori terms. In particular, the enhanced

Nochetto, Ricardo H.

171

A neoclassical realist analysis of American ‘dual containment’ policy in the Persian Gulf: 1991-2001.  

E-Print Network (OSTI)

??This thesis examines the American policy of ‘dual containment’: the assumption by the US of a predominant role in the security system of the Persian… (more)

Edwards, Alex

2013-01-01T23:59:59.000Z

172

A new warmstarting strategy for the primal-dual column generation ...  

E-Print Network (OSTI)

Jun 22, 2012 ... One of the main advantages of the proposed strategy is that it does not require extensive ... fundamentals of primal-dual methods. In Section 3 ...

2012-06-22T23:59:59.000Z

173

Quantification of liver iron content with CT—added value of dual-energy  

Science Journals Connector (OSTI)

To evaluate the value of dual-energy CT (DECT) with use of an ... decomposition algorithm for the quantification of liver iron content (LIC).

Michael A. Fischer; Caecilia S. Reiner; Dimitri Raptis; Olivio Donati…

2011-08-01T23:59:59.000Z

174

A new warmstarting strategy for the primal-dual column generation ...  

E-Print Network (OSTI)

Jun 24, 2012 ... Abstract: This paper presents a new warmstarting technique in the context of a primal-dual column generation method applied to solve a ...

Jacek Gondzio

2012-06-24T23:59:59.000Z

175

Bulk viscosity of strongly coupled plasmas with holographic duals  

E-Print Network (OSTI)

We explain a method for computing the bulk viscosity of strongly coupled thermal plasmas dual to supergravity backgrounds supported by one scalar field. Whereas earlier investigations required the computation of the leading dissipative term in the dispersion relation for sound waves, our method requires only the leading frequency dependence of an appropriate Green's function in the low-frequency limit. With a scalar potential chosen to mimic the equation of state of QCD, we observe a slight violation of the lower bound on the ratio of the bulk and shear viscosities conjectured in arXiv:0708.3459.

Steven S. Gubser; Silviu S. Pufu; Fabio D. Rocha

2008-06-02T23:59:59.000Z

176

Dual-phase ferritic martensitic steel for concrete reinforcement  

SciTech Connect

This paper will discuss the microstructural characteristics and the mechanical and corrosion properties of dual-phase ferritic martensitic (DFM) steel embedded in concrete. Previous research on DFM steel has shown that these steels can attain higher tensile strengths, higher energy absorption, more fatigue resistance, higher ductility, and superior corrosion resistance than conventional reinforcement. Currently, a research project investigating the mechanical and durability aspects of DFM bars embedded in small concrete samples is underway. The objective of this research is to determine mechanical characteristics and present preliminary findings on possible corrosion mechanisms of a 0.1C/2Si DFM steel embedded in concrete.

Trejo, D.; Monteiro, P.; Thomas, G. [Univ. of California, Berkeley, CA (United States)

1995-12-31T23:59:59.000Z

177

Non-linear parent action and dual gravity  

E-Print Network (OSTI)

We give a reformulation of non-linear Einstein gravity, which contains the dual graviton together with the ordinary metric and a shift gauge field. The metric does not enter through a `kinetic' Einstein-Hilbert term, but via topological couplings, and so the theory does not lead to a doubling of degrees of freedom. The field equations take the form of first-order duality relations. We analyze the gauge symmetries and comment on their meaning with regard to the E11 proposal.

Nicolas Boulanger; Olaf Hohm

2012-04-29T23:59:59.000Z

178

The thermodynamic dual structure of linear-dissipative driven systems  

E-Print Network (OSTI)

The spontaneous emergence of dynamical order, such as persistent currents, is sometimes argued to require principles beyond the entropy maximization of the second law of thermodynamics. I show that, for linear dissipation in the Onsager regime, current formation can be driven by exactly the Jaynesian principle of entropy maximization, suitably formulated for extended systems and nonequilibrium boundary conditions. The Legendre dual structure of equilibrium thermodynamics is also preserved, though it requires the admission of current-valued state variables, and their correct incorporation in the entropy.

Eric Smith

2005-05-02T23:59:59.000Z

179

Monitoring system assists in dual-fuel engine knock prevention  

SciTech Connect

ABB Industrietechnik AG recently has introduced an augmented version of its Cyldeyt cylinder pressure monitoring system aimed at spark-ignited and diesel/gas, dual-fuel engines. In addition to recording and evaluating cylinder pressure as a means of assessing engine condition, the new Cyldet version now evaluates the cylinder pressure signals to provide protection against pre-ignition related damage. When pre-ignition reaches critical levels, the Cyldet computer relays alarm signals in two stages to the overriding engine control system of the power plant. On receiving the first-stage alarm signal, the engine control system is programmed to adjust one or more engine settings to eliminate preignition - a typical adjustment is to lower charge-air temperature, for example. If such measures fail to eliminate pre-ignition, in the case of a dual-fuel engine, a second alarm signal triggers a reduction in engine load or, as last resort, changeover of the engine to 100% diesel fuel charge. This paper outlines the advantages and applications of the system. 1 fig., 1 tab.

Not Available

1995-03-01T23:59:59.000Z

180

Dual Phase Membrane for High Temperature CO2 Separation  

SciTech Connect

This project aimed at synthesis of a new inorganic dual-phase carbonate membrane for high temperature CO{sub 2} separation. Metal-carbonate dual-phase membranes were prepared by the direct infiltration method and the synthesis conditions were optimized. Permeation tests for CO{sub 2} and N{sub 2} from 450-750 C showed very low permeances of those two gases through the dual-phase membrane, which was expected due to the lack of ionization of those two particular gases. Permeance of the CO{sub 2} and O{sub 2} mixture was much higher, indicating that the gases do form an ionic species, CO{sub 3}{sup 2-}, enhancing transport through the membrane. However, at temperatures in excess of 650 C, the permeance of CO{sub 3}{sup 2-} decreased rapidly, while predictions showed that permeance should have continued to increase with temperature. XRD data obtained from used membrane indicated that lithium iron oxides formed on the support surface. This lithium iron oxide layer has a very low conductivity, which drastically reduces the flow of electrons to the CO{sub 2}/O{sub 2} gas mixture; thus limiting the formation of the ionic species required for transport through the membrane. These results indicated that the use of stainless steel supports in a high temperature oxidative environment can lead to decreased performance of the membranes. This revelation created the need for an oxidation resistant support, which could be gained by the use of a ceramic-type membrane. Work was extended to synthesize a new inorganic dual-phase carbonate membrane for high temperature CO{sub 2} separation. Helium permeance of the support before and after infiltration of molten carbonate are on the order of 10{sup -6} and 10{sup -10} moles/m{sup 2} {center_dot} Pa {center_dot} s respectively, indicating that the molten carbonate is able to sufficiently infiltrate the membrane. It was found that La{sub 0.6}Sr{sub 0.4}Co{sub 0.8}Fe{sub 0.2}O{sub 3-{delta}} (LSCF) was a suitable candidate for the support material. This support material proved to separate CO{sub 2} when combined with O{sub 2} at a flux of 0.194 ml/min {center_dot} cm{sup 2} at 850 C. It was also observed that, because LSCF is a mixed conductor (conductor of both electrons and oxygen ions), the support was able to provide its own oxygen to facilitate separation of CO{sub 2}. Without feeding O{sub 2}, the LSCF dual phase membrane produced a maximum CO{sub 2} flux of 0.246 ml/min {center_dot} cm{sup 2} at 900 C.

Jerry Lin

2007-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Development of Dual-Electrode Amperometric Detectors for Liquid Chromatography and Capillary Electrophoresis  

E-Print Network (OSTI)

be operated in either a redox cycling mode or dual–potential mode, where either chemical reversibility or voltammetry could be used as a means to confirm migration based peak identification, respectively. The same design was then applied for a dual Au/Hg...

Dorris, Megan

2013-05-31T23:59:59.000Z

182

PROOF-OF-CONCEPT OF A DUAL-FIRED (SOLAR & NATURAL GAS) GENERATOR  

E-Print Network (OSTI)

PROOF-OF-CONCEPT OF A DUAL-FIRED (SOLAR & NATURAL GAS) GENERATOR FOR USE IN A SPACE-COOLING SYSTEM REPORT (FAR) PROOF-OF-CONCEPT OF A DUAL-FIRED (SOLAR & NATURAL GAS) GENERATOR FOR USE IN A SPACE COOLING Technologies · Environmentally-Preferred Advanced Generation · Energy-Related Environmental Research · Energy

183

Using Ilmenite To Reduce the Tar Yield in a Dual Fluidized Bed Gasification System  

Science Journals Connector (OSTI)

In this work, ilmenite was used as the catalytic material in the Chalmers 2–4 MWth dual fluidized bed gasifier to decrease the yield of tar. ... Indirect gasification, using the Dual Fluidized Bed (DFB) concept, has been identified as being suitable for medium- to large-scale production units. ... catalytic reactors, the implementation of specific reaction media such as supercrit. ...

Anton Larsson; Mikael Israelsson; Fredrik Lind; Martin Seemann; Henrik Thunman

2014-03-10T23:59:59.000Z

184

Primal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including a  

E-Print Network (OSTI)

Primal-Dual Interior Point Method Applied to the Short Term Hydroelectric Scheduling Including that minimizes losses in the transmission and costs in the generation of a hydroelectric power system, formulated such perturbing parameter. Keywords-- Hydroelectric power system, Network flow, Predispatch, Primal-dual interior

Oliveira, Aurélio R. L.

185

Comprehensive computational model of single-and dual-loop optoelectronic  

E-Print Network (OSTI)

Comprehensive computational model of single- and dual-loop optoelectronic oscillators describe a comprehensive computational model for single- loop and dual-loop optoelectronic oscillators amplifiers and oscillators; (230.0250) Optoelectronics; (230.4910) Oscillators. References and links 1. X. S

Horowitz, Moshe

186

Laboratory Evaluation of Three Rapid Diagnostic Tests for Dual Detection of HIV and Treponema pallidum Antibodies  

Science Journals Connector (OSTI)

...Laboratory Evaluation of Three Rapid Diagnostic Tests for Dual Detection of HIV and Treponema...dual HIV and syphilis rapid diagnostic tests (RDTs) was evaluated for 150 patient...FDA-approved HIV-1 RNA nucleic acid test (NAT) (11). Reference methods for...

Romney M. Humphries; Jennifer S. Woo; Jun Ho Chung; Anita Sokovic; Claire C. Bristow; Jeffrey D. Klausner

2014-10-08T23:59:59.000Z

187

The piston dynamics under knock situation of diesel dual fuel engine: a numerical study  

Science Journals Connector (OSTI)

A compression ignition engine fueled by natural gas or Diesel Dual Fuel (DDF) engine is a promising engine for the future of a high oil price. Unfortunately, the DDF engine knocks easily: this leads to damage of pistons. So, the understanding of the ... Keywords: diesel dual fuel engine, knock, mixed-lubrication, modelling, piston secondary motion, simulation

Krisada Wannatong; Somchai Chanchaona; Surachai Sanitjai

2007-01-01T23:59:59.000Z

188

Ordered Arrays of Dual-Diameter Nanopillars for Maximized Optical Absorption  

E-Print Network (OSTI)

Ordered Arrays of Dual-Diameter Nanopillars for Maximized Optical Absorption Zhiyong Fan,,,§ Rehan control to achieve the optimal absorption efficiency. Increasing the Ge materials filling ratio is shown a strong diameter dependency. To enhance the broad band optical absorption efficiency, a novel dual

Javey, Ali

189

X-Ray Spectra for Bone Quality Assessment Using Energy Dispersive Counting and Imaging Detectors with Dual Energy Method  

Science Journals Connector (OSTI)

The aim of the present study was the optimization of dual energy x-ray spectra through the estimation of ... monoenergetic x-ray beams provides the optimum dual energy pairs minimizing the CV. Single and double ....

P. Sotiropoulou; G. Fountos; N. Martini…

2014-01-01T23:59:59.000Z

190

An Early Performance Evaluation of the NEXRAD Dual-Polarization Radar Rainfall Estimates for Urban Flood Applications  

Science Journals Connector (OSTI)

Dual-polarization radars are expected to provide better rainfall estimates than single-polarization radars because of their ability to characterize hydrometeor type. The goal of this study is to evaluate single- and dual-polarization radar ...

Luciana K. Cunha; James A. Smith; Mary Lynn Baeck; Witold F. Krajewski

2013-12-01T23:59:59.000Z

191

A dual-porosity reservoir model with a nonlinear coupling term  

SciTech Connect

Since their introduction by Barenblatt et al. (1960), double-porosity models have been widely used for simulating flow in fractured reservoirs, such as geothermal reservoirs. In a dual-porosity system, the matrix blocks provide most of the storage of the reservoir, whereas the fractures provide the global transmissivity. Initially, most work on dual-porosity models emphasized the development of analytical solutions to idealized reservoir problems. Increasingly, the dual-porosity approach is being implemented by numerical reservoir simulators. Accurate numerical simulation of a dual-porosity problem often requires a prohibitively large number of computational cells in order to resolve the transient pressure gradients in the matrix blocks. We discuss a new dual-porosity model that utilizes a nonlinear differential equation to approximate the fracture/matrix interactions, When implemented into a numerical simulator, it eliminates the need to discretize the matrix blocks, and thereby allows more efficient simulation of reservoir problems.

Zimmerman, R.W.; Chen, G.; Hadgu, T.; Bodvarsson, G.S.

1992-09-01T23:59:59.000Z

192

The B F Goodrich Information Retrieval System and Automatic Information Distribution Using Computer-Compiled Thesaurus and Dual Dictionary  

Science Journals Connector (OSTI)

The B F Goodrich Information Retrieval System and Automatic Information Distribution Using Computer-Compiled Thesaurus and Dual Dictionary ...

Paul J. Horvath; Alice Yanosko. Chamis; Robert F. Carroll; Joyce. Dlugos

1967-08-01T23:59:59.000Z

193

INTEGRATED VERTICAL AND OVERHEAD DECONTAMINATION (IVOD) SYSTEM  

SciTech Connect

The deactivation and decommissioning of 1200 buildings within the U.S. Department of Energy-Office of Environmental Management complex will require the disposition of a large quantity of contaminated concrete and metal surfaces. It has been estimated that 23 million cubic meters of concrete and over 600,000 tons of metal will need disposition. The disposition of such large quantities of material presents difficulties in the area of decontamination and characterization. The final disposition of this large amount of material will take time and money as well as risk to the D&D work force. A single automated system that would decontaminate and characterize surfaces in one step would not only reduce the schedule and decrease cost during D&D operations but would also protect the D&D workers from unnecessary exposures to contaminated surfaces. This report summarizes the activities performed during FY00 and describes the planned activities for FY01. Accomplishments for FY00 include the following: Development and field-testing of characterization system; Completion of Title III design of deployment platform and decontamination unit; In-house testing of deployment platform and decontamination unit; Completion of system integration design; Identification of deployment site; and Completion of test plan document for deployment of IVOD at Rancho Seco nuclear power facility.

M.A. Ebadian, Ph.D.

2001-01-01T23:59:59.000Z

194

A bridge to lower overhead quantum computation  

E-Print Network (OSTI)

Two primary challenges stand in the way of practical large-scale quantum computation, namely achieving sufficiently low error rate quantum gates and implementing interesting quantum algorithms with a physically reasonable number of qubits. In this work we address the second challenge, presenting a new technique, bridge compression, which enables remarkably low volume structures to be found that implement complex computations in the surface code. The surface code has a number of highly desirable properties, including the ability to achieve arbitrarily reliable computation given sufficient qubits and quantum gate error rates below approximately 1%, and the use of only a 2-D array of qubits with nearest neighbor interactions. As such, our compression technique is of great practical relevance.

Austin G. Fowler; Simon J. Devitt

2012-09-04T23:59:59.000Z

195

Rural electrification using overhead HVDC transmission lines.  

E-Print Network (OSTI)

??One of mankind’s greatest modern challenges is poverty alleviation. The provision of electricity can greatly assist in this regard. The tapping of small amounts of… (more)

Ijumba, Nelson M.

2012-01-01T23:59:59.000Z

196

INTEGRATED VERTICAL AND OVERHEAD DECONTAMINATION SYSTEM  

SciTech Connect

This report summarizes the activities performed during FY98 and describes the planned activities for FY99. Accomplishments for FY98 include identifying and selecting decontamination, the screening of potential characterization technologies, development of minimum performance factors for the decontamination technology, and development and identification of Applicable, Relevant and Appropriate Regulations (ARARs).

M.A. Ebadian, Ph.D.

1999-01-01T23:59:59.000Z

197

Breast Density Assessment in Adolescent Girls Using Dual-Energy X-ray Absorptiometry: A Feasibility Study  

Science Journals Connector (OSTI)

...Assessment in Adolescent Girls Using Dual-Energy X-ray Absorptiometry: A Feasibility...explored a commercially available dual-energy X-ray absorptiometer (DXA) system...Prev 2008;17(7):1709-13) Dual-energy X-ray Absorptiometry|breast density...

John A. Shepherd; Serghei Malkov; Bo Fan; Aurelie Laidevant; Rachel Novotny; Gertraud Maskarinec

2008-07-01T23:59:59.000Z

198

Dual fuel engine control systems for transportation applications  

SciTech Connect

Microprocessor control systems have been developed for dual fuel diesel engines intended for transportation applications. Control system requirements for transportation engines are more demanding than for stationary engines, as the system must be able to cope with variable speed and load. Detailed fuel maps were determined for both normally aspirated and turbocharged diesel engines based on the criterion that the engine did not operate in the regimes where knock or incomplete combustion occurred. The control system was developed so that the engine would follow the detailed fuel map. The input variables to the control system are engine speed and load. Based on this, the system then controls the amount of natural gas and diesel fuel supplied to the engine. The performance of the system is briefly summarized.

Gettel, L.E.; Perry, G.C.; Boisvert, J.; O'Sullivan, P.J.

1987-10-01T23:59:59.000Z

199

Dual-Bed Gasification of Petcoke: Model Development and Validation  

Science Journals Connector (OSTI)

Dual-Bed Gasification of Petcoke: Model Development and Validation ... A series of sensitivity analyses is performed with regard to a conventional gasifier fed by petcoke, and the effects of residence time and oxygen/carbon mass ratio in the feed are investigated over three process variables: char conversion at the gasifier exit, temperature at the gasifier exit, and amount of useful syngas (H2 and CO) produced, in terms of N?m3 per ton of petcoke. ... Different from most literature publications, such as refs 5 and 6, where coal and/or petcoke gasification models are checked against available data, with respect to the syngas composition obtained, and to the process cold gas efficiency, one of the purposes of our paper is to correlate experimental data to a parameter that is important both for simulation and for reactor design: the value of the residence time of the gasifier. ...

Maria Sudiro; Carlos Zanella; Alberto Bertucco; Luigi Bressan; Marco Fontana

2010-01-15T23:59:59.000Z

200

Iterative Self-Dual Reconstruction on Radar Image Recovery  

SciTech Connect

Imaging systems as ultrasound, sonar, laser and synthetic aperture radar (SAR) are subjected to speckle noise during image acquisition. Before analyzing these images, it is often necessary to remove the speckle noise using filters. We combine properties of two mathematical morphology filters with speckle statistics to propose a signal-dependent noise filter to multiplicative noise. We describe a multiscale scheme that preserves sharp edges while it smooths homogeneous areas, by combining local statistics with two mathematical morphology filters: the alternating sequential and the self-dual reconstruction algorithms. The experimental results show that the proposed approach is less sensitive to varying window sizes when applied to simulated and real SAR images in comparison with standard filters.

Martins, Charles; Medeiros, Fatima; Ushizima, Daniela; Bezerra, Francisco; Marques, Regis; Mascarenhas, Nelson

2010-05-21T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Markov Entropy Decomposition: A Variational Dual for Quantum Belief Propagation  

Science Journals Connector (OSTI)

We present a lower bound for the free energy of a quantum many-body system at finite temperature. This lower bound is expressed as a convex optimization problem with linear constraints, and is derived using strong subadditivity of von Neumann entropy and a relaxation of the consistency condition of local density operators. The dual to this minimization problem leads to a set of quantum belief propagation equations, thus providing a firm theoretical foundation to that approach. The minimization problem is numerically tractable, and we find good agreement with quantum Monte Carlo calculations for spin-12 Heisenberg antiferromagnet in two dimensions. This lower bound complements other variational upper bounds. We discuss applications to Hamiltonian complexity theory and give a generalization of the structure theorem of [P. Hayden et al., Commun. Math. Phys. 246, 359 (2004).] to trees in an appendix.

David Poulin and Matthew B. Hastings

2011-02-24T23:59:59.000Z

202

Dual annular rotating "windowed" nuclear reflector reactor control system  

DOE Patents (OSTI)

A nuclear reactor control system is provided in a nuclear reactor having a core operating in the fast neutron energy spectrum where criticality control is achieved by neutron leakage. The control system includes dual annular, rotatable reflector rings. There are two reflector rings: an inner reflector ring and an outer reflector ring. The reflectors are concentrically assembled, surround the reactor core, and each reflector ring includes a plurality of openings. The openings in each ring are capable of being aligned or non-aligned with each other. Independent driving means for each of the annular reflector rings is provided so that reactor criticality can be initiated and controlled by rotation of either reflector ring such that the extent of alignment of the openings in each ring controls the reflection of neutrons from the core.

Jacox, Michael G. (Idaho Falls, ID); Drexler, Robert L. (Idaho Falls, ID); Hunt, Robert N. M. (Idaho Falls, ID); Lake, James A. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

203

Design of a dual species atom interferometer for space  

E-Print Network (OSTI)

Atom interferometers have a multitude of proposed applications in space including precise measurements of the Earth's gravitational field, in navigation & ranging, and in fundamental physics such as tests of the weak equivalence principle (WEP) and gravitational wave detection. While atom interferometers are realized routinely in ground-based laboratories, current efforts aim at the development of a space compatible design optimized with respect to dimensions, weight, power consumption, mechanical robustness and radiation hardness. In this paper, we present a design of a high-sensitivity differential dual species $^{85}$Rb/$^{87}$Rb atom interferometer for space, including physics package, laser system, electronics and software. The physics package comprises the atom source consisting of dispensers and a 2D magneto-optical trap (MOT), the science chamber with a 3D-MOT, a magnetic trap based on an atom chip and an optical dipole trap (ODT) used for Bose-Einstein condensate (BEC) creation and interferometry...

Schuldt, Thilo; Krutzik, Markus; Bote, Lluis Gesa; Gaaloul, Naceur; Hartwig, Jonas; Ahlers, Holger; Herr, Waldemar; Posso-Trujillo, Katerine; Rudolph, Jan; Seidel, Stephan; Wendrich, Thijs; Ertmer, Wolfgang; Herrmann, Sven; Kubelka-Lange, André; Milke, Alexander; Rievers, Benny; Rocco, Emanuele; Hinton, Andrew; Bongs, Kai; Oswald, Markus; Franz, Matthias; Hauth, Matthias; Peters, Achim; Bawamia, Ahmad; Wicht, Andreas; Battelier, Baptiste; Bertoldi, Andrea; Bouyer, Philippe; Landragin, Arnaud; Massonnet, Didier; Lévèque, Thomas; Wenzlawski, Andre; Hellmig, Ortwin; Windpassinger, Patrick; Sengstock, Klaus; von Klitzing, Wolf; Chaloner, Chris; Summers, David; Ireland, Philip; Mateos, Ignacio; Sopuerta, Carlos F; Sorrentino, Fiodor; Tino, Guglielmo M; Williams, Michael; Trenkel, Christian; Gerardi, Domenico; Chwalla, Michael; Burkhardt, Johannes; Johann, Ulrich; Heske, Astrid; Wille, Eric; Gehler, Martin; Cacciapuoti, Luigi; Gürlebeck, Norman; Braxmaier, Claus; Rasel, Ernst

2014-01-01T23:59:59.000Z

204

Preliminary Report on Dual-Purpose Canister Disposal Alternatives (FY13) |  

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

Preliminary Report on Dual-Purpose Canister Disposal Alternatives Preliminary Report on Dual-Purpose Canister Disposal Alternatives (FY13) Preliminary Report on Dual-Purpose Canister Disposal Alternatives (FY13) This report documents the first phase of a multi-year project to understand the technical feasibility and logistical implications of direct disposal of spent nuclear fuel (SNF) in existing dual-purpose canisters (DPCs) and other types of storage casks. The first phase includes a set of preliminary disposal concepts and associated technical analyses, identification of additional R&D needs, and a recommendation to proceed with the next phase of the evaluation effort. Preliminary analyses indicate that DPC direct disposal could be technically feasible, at least for certain disposal concepts. DPC disposal concepts include the salt concept, and emplacement

205

Photo of the Week: The First Energy-Efficient Dual-Paned Windows |  

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

The First Energy-Efficient Dual-Paned Windows The First Energy-Efficient Dual-Paned Windows Photo of the Week: The First Energy-Efficient Dual-Paned Windows December 5, 2013 - 12:53pm Addthis Researchers at Berkeley Lab helped develop the first energy-efficient dual-paned windows, now used in buildings and homes worldwide for billions of dollars in energy savings. Current windows research in the Environmental Energy Technologies Division at Berkeley Lab is aimed at developing new glazing materials, windows simulation software and other advanced high-performance window systems. The building shown here, located at Berkeley Lab, is a windows testing facility. | Photo courtesy of Roy Kaltschmidt, Lawrence Berkeley National Laboratory. Researchers at Berkeley Lab helped develop the first energy-efficient

206

Data Center Economizer Cooling with Tower Water; Demonstration of a Dual Heat Exchanger Rack Cooling Device  

E-Print Network (OSTI)

of a Dual Heat Exchanger Rack Cooling Device H.C. Coles, S.prototype computer equipment rack-level cooling device withIT equipment cooling, server rack cooling, server cooling,

Greenberg, Steve

2014-01-01T23:59:59.000Z

207

Engineering aesthetics and aesthetic ergonomics: Theoretical foundations and a dual-process research methodology  

E-Print Network (OSTI)

Engineering aesthetics and aesthetic ergonomics: Theoretical foundations and a dual, Ann Arbor, MI, 48109-2117, USA Keywords: Engineering aesthetics; Aesthetic ergonomics; Aesthetic human judgments and `educated guesses'. Whilst ergonomics and human factors researchers have made great

Liu, Yili

208

Impacts of Raindrop Fall Velocity and Axis Ratio Errors on Dual-Polarization Radar Rainfall Estimation  

Science Journals Connector (OSTI)

Motivated by the field observations of fall velocity and axis ratio deviations from predicted terminal velocity and equilibrium axis ratio values, the combined effects of raindrop fall velocity and axis ratio deviations on dual-polarization radar ...

Bin Pei; Firat Y. Testik; Mekonnen Gebremichael

2014-10-01T23:59:59.000Z

209

Public Versus Private Insurance with Dual Theory: A Political Economy Argument  

Science Journals Connector (OSTI)

This paper analyzes the political support for public insurance in the presence...Econometrica..., 55, 95–115, 1987] dual theory to expected utility (i.e., risk aversion without diminishing marginal utility of inc...

Jean Hindriks

2001-12-01T23:59:59.000Z

210

Efficiency of production of additional condensation power at dual-purpose turbine plants  

Science Journals Connector (OSTI)

Results of detailed computations (performed with the use of mathematical models of dual-purpose turbine plants) of the effect of the main operating factors on the energy and economic efficiency of the production ...

E. I. Éfros; N. V. Tatarinova

2006-11-01T23:59:59.000Z

211

Graphene-based passively Q-switched dual-wavelength erbium-doped fiber laser  

Science Journals Connector (OSTI)

We demonstrate a compact Q-switched dual-wavelength erbium-doped fiber (EDF) laser based on graphene as a saturable absorber (SA). By optically driven deposition of graphene on a...

Luo, Zhengqian; Zhou, Min; Weng, Jian; Huang, Guoming; Xu, Huiying; Ye, Chenchun; Cai, Zhiping

2010-01-01T23:59:59.000Z

212

Power control of dual-motor electric drive for tracked vehicles  

Science Journals Connector (OSTI)

The fundamental problem of the power control for the driving of a dual-motor drive electric tracked vehicle is analyzed. The tracked vehicle and its electric drive system are mathematically modeled. Power control...

Yuan Zou; Chengning Zhang; Fengchun Sun…

2010-03-01T23:59:59.000Z

213

Dual Diathesis-Stressor Model of Emotional and Linguistic Contributions to Developmental Stuttering  

Science Journals Connector (OSTI)

This study assessed emotional and speech-language contributions to childhood stuttering. A dual diathesis-stressor framework guided this ... its regulation, are hypothesized to contribute to stuttering. The langu...

Tedra A. Walden; Carl B. Frankel; Anthony P. Buhr…

2012-05-01T23:59:59.000Z

214

DUAL MODE SCRAMJET: A COMPUTATIONAL INVESTIGATION ON COMBUSTOR DESIGN AND OPERATION.  

E-Print Network (OSTI)

??Numerical analysis was performed on a Dual-Mode Scramjet isolator-combustor. Preliminary analysis was performed to form a baseline geometry. Another study validated the results of a… (more)

Milligan, Ryan Timothy

2009-01-01T23:59:59.000Z

215

A Protocol for Quality Control Testing for Contrast-Enhanced Dual Energy Mammography Systems  

Science Journals Connector (OSTI)

Physics and radiographer QC procedures are urgently needed as the first few contrast-enhanced dual energy systems have been installed in the U.K. Preliminary work on one commercially available system has enabl...

Jennifer Oduko; Peter Homolka; Vivienne Jones; David Whitwam

2014-01-01T23:59:59.000Z

216

A Universal Dual-Fuel Controller for OEM/Aftermarket Diesel Engineswit...  

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

More Documents & Publications Active DPF for Off-Road Particulate Matter (PM) Control Propane-Diesel Dual Fuel for CO2 and Nox Reduction DPF for a Tractor Auxiliary Power Unit...

217

Internal tar/CH4 reforming in a biomass dual fluidised bed gasifier  

Science Journals Connector (OSTI)

An internal reformer is developed for in situ catalytic reforming of tar and methane (CH4) in allothermal gasifiers. The study has been performed in the ... 150 kW dual fluidised bed (DFB) biomass gasifier at Mid...

Kristina Göransson; Ulf Söderlind; Till Henschel…

2014-10-01T23:59:59.000Z

218

Multi-Color Laser Spectroscopy with a Dual-Wavelength Quantum Cascade Laser  

Science Journals Connector (OSTI)

A new concept of multi-color spectroscopy based on a dual-wavelength QCL is presented. The latter emits at two distinct wavelengths (5.26 and 6.25 µm), featuring simultaneous...

Jágerská, Jana; Jouy, Pierre; Tuzson, Béla; Looser, Herbert; Hugi, Andreas; Mangold, Markus; Soltic, Patrik; Emmenegger, Lukas; Faist, Jérôme

219

Gasification of Coffee Grounds in Dual Fluidized Bed:? Performance Evaluation and Parametric Investigation  

Science Journals Connector (OSTI)

Gasification of Coffee Grounds in Dual Fluidized Bed:? Performance Evaluation and Parametric Investigation ... Ishikawajima-Harima Heavy Industries Co., Ltd. ... With a national technical program, we recently worked on converting this biomass waste into middle-caloric product gas. ...

Guangwen Xu; Takahiro Murakami; Toshiyuki Suda; Yoshiaki Matsuzawa; Hidehisa Tani

2006-10-28T23:59:59.000Z

220

A novel patch antenna with switchable slot (PASS): Dual-frequency operation with reversed circular polarizations  

E-Print Network (OSTI)

G. Gentili, “Dual frequency patch antennas,” IEEE An- tennasF. Yang and Y. Rahmat-Samii, “Patch antennas with switchable47, no. 2, pp. 13–29, Apr. , “Patch antenna with swichable

Jin, N B; Yang, F; Rahmat-Samii, Y

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Simultaneous dual-wavelength reflection digital holography applied to the study of the porous coal samples  

Science Journals Connector (OSTI)

We present a simultaneous dual-wavelength phase-imaging digital holographic technique demonstrated on porous coal samples. The use of two wavelengths enables us to increase the axial...

Khmaladze, Alexander; Restrepo-Martínez, Alejandro; Kim, Myung; Castañeda, Roman; Blandón, Astrid

2008-01-01T23:59:59.000Z

222

Multiplexed fiber-optic sensors using a dual-slope frequency-modulated source  

Science Journals Connector (OSTI)

We propose and demonstrate a multiplexed fiber-optic sensor system using a dual-slope (triangular) frequency-modulated laser source. The restrictions in the selection of beat...

Chien, Pie-Yau; Pan, Ci-Ling

1991-01-01T23:59:59.000Z

223

Improved proton computed tomography by dual modality image reconstruction  

SciTech Connect

Purpose: Proton computed tomography (CT) is a promising image modality for improving the stopping power estimates and dose calculations for particle therapy. However, the finite range of about 33 cm of water of most commercial proton therapy systems limits the sites that can be scanned from a full 360° rotation. In this paper the authors propose a method to overcome the problem using a dual modality reconstruction (DMR) combining the proton data with a cone-beam x-ray prior. Methods: A Catphan 600 phantom was scanned using a cone beam x-ray CT scanner. A digital replica of the phantom was created in the Monte Carlo code Geant4 and a 360° proton CT scan was simulated, storing the entrance and exit position and momentum vector of every proton. Proton CT images were reconstructed using a varying number of angles from the scan. The proton CT images were reconstructed using a constrained nonlinear conjugate gradient algorithm, minimizing total variation and the x-ray CT prior while remaining consistent with the proton projection data. The proton histories were reconstructed along curved cubic-spline paths. Results: The spatial resolution of the cone beam CT prior was retained for the fully sampled case and the 90° interval case, with the MTF = 0.5 (modulation transfer function) ranging from 5.22 to 5.65?linepairs/cm. In the 45° interval case, the MTF = 0.5 dropped to 3.91?linepairs/cm For the fully sampled DMR, the maximal root mean square (RMS) error was 0.006 in units of relative stopping power. For the limited angle cases the maximal RMS error was 0.18, an almost five-fold improvement over the cone beam CT estimate. Conclusions: Dual modality reconstruction yields the high spatial resolution of cone beam x-ray CT while maintaining the improved stopping power estimation of proton CT. In the case of limited angles, the use of prior image proton CT greatly improves the resolution and stopping power estimate, but does not fully achieve the quality of a 360° proton CT scan.

Hansen, David C., E-mail: dch@ki.au.dk; Bassler, Niels [Experimental Clinical Oncology, Aarhus University, 8000 Aarhus C (Denmark)] [Experimental Clinical Oncology, Aarhus University, 8000 Aarhus C (Denmark); Petersen, Jørgen Breede Baltzer [Medical Physics, Aarhus University Hospital, 8000 Aarhus C (Denmark)] [Medical Physics, Aarhus University Hospital, 8000 Aarhus C (Denmark); Sørensen, Thomas Sangild [Computer Science, Aarhus University, 8000 Aarhus C, Denmark and Clinical Medicine, Aarhus University, 8200 Aarhus N (Denmark)] [Computer Science, Aarhus University, 8000 Aarhus C, Denmark and Clinical Medicine, Aarhus University, 8200 Aarhus N (Denmark)

2014-03-15T23:59:59.000Z

224

Different effects of dual task demands on the speech of young and older adults  

E-Print Network (OSTI)

Kemper, S., Herman, R. E., Nartowicz, J.(2005). Different Effects of Dual Task Demands on the Speech of Young and Older Adults. Aging, Neuropsychology, and Cognition, 12, 340-358. PM#1410812. Publisher’s official version: http://dx.doi.org/10...., Nartowicz, J.(2005). Different Effects of Dual Task Demands on the Speech of Young and Older Adults. Aging, Neuropsychology, and Cognition, 12, 340-358. PM#1410812 Abstract: Young and older adults provided language samples in response to elicitation...

Kemper, Susan; Herman, Ruth; Nartowicz, Jennifer

2005-12-01T23:59:59.000Z

225

A Dual Tone Multiple Frequency receiver using a multiplexed OTA-C filter frequency detection architecture  

E-Print Network (OSTI)

A DUAL TONE MULTIPLE FREQUENCY RECEIVER USING A MULTIPLEXED OTA-C FILTER FREQUENCY DETECTION ARCHITECTURE A Thesis by GERALD WILLIAM GARCIA Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement... for the degree of MASTER OF SCIENCE August 1988 Major Subject: Electrical Engineering A DUAL TONE MULTIPLE FREQUENCY RECEIVER USING A MULTIPLEXED OTA-C FILTER FREQUENCY DETECTION ARCHITECTURE A Thesis by GERALD WILLIAM GARCIA Approved as to style...

Garcia, Gerald William

2012-06-07T23:59:59.000Z

226

Evaluating dual-view perceptual issues in handheld augmented reality: device vs. user perspective rendering  

Science Journals Connector (OSTI)

In handheld Augmented Reality (AR) the magic-lens paradigm is typically implemented by rendering the video stream captured by the back-facing camera onto the device's screen. Unfortunately, such implementations show the real world from the device's perspective ... Keywords: ar, device-perspective, dual-perspective, dual-view, handheld, mobile, perception, perceptual issue, rendering, spatial-perception, user expectation, user study, user-perspective

Klen ?opi? Pucihar; Paul Coulton; Jason Alexander

2013-12-01T23:59:59.000Z

227

Dual Gravitons in AdS4/CFT3 and the Holographic Cotton Tensor  

E-Print Network (OSTI)

We argue that gravity theories in AdS4 are holographically dual to either of two three-dimensional CFT's: the usual Dirichlet CFT1 where the fixed graviton acts as a source for the stress-energy tensor, and a dual CFT2 with a fixed dual graviton which acts as a source for a dual stress-energy tensor. The dual stress-energy tensor is shown to be the Cotton tensor of the Dirichlet CFT. The two CFT's are related by a Legendre transformation generated by a gravitational Chern-Simons coupling. This duality is a gravitational version of electric-magnetic duality valid at any radius r, where the renormalized stress-energy tensor is the electric field and the Cotton tensor is the magnetic field. Generic Robin boundary conditions lead to CFT's coupled to Cotton gravity or topologically massive gravity. Interaction terms with CFT1 lead to a non-zero vev of the stress-energy tensor in CFT2 coupled to gravity even after the source is removed. We point out that the dual graviton also exists beyond the linearized approximation, and spell out some of the details of the non-linear construction.

Sebastian de Haro

2008-08-15T23:59:59.000Z

228

Dual-phase membrane for High temperature CO2 separation  

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

Jerry Y.S. Lin Jerry Y.S. Lin Chemical Engineering Arizona State University Tempe, AZ 85287 Jerry.lin@asu.edu Pre-Combustion Carbon Dioxide Capture by a New Dual-Phase Ceramic-Carbonate Membrane Reactor 2 Background 3 CO 2 Capture Methods and Efficiency Improvement Coal, Natural gas, Biomass CO 2 separation Power plant CO 2 compression, conditioning for sequestration Gasification Reforming Shift CO 2 Separation Power plant Power plant Air separation N 2 /O 2 CO 2 Post- combustion H 2 /CO H 2 /CO H 2 CO 2 H 2 O/N 2 /O 2 CO 2 H 2 Pre- combustion Air N 2 O 2 or O 2 /CO 2 CO 2 Oxyfuel Combustion Air separation Air Air separation Air Air separation Air Air Air Air Air separation Air Air separation Air N 2 Air separation Air O 2 or O 2 /CO 2 N 2 Air separation Air N 2 Air O 2 or O 2 /CO 2 N 2 Air Air separation N 2 Air 4 Water-Gas-Shift Reaction and Membrane Reactor Reforming

229

Ethanol diesel dual fuel clean combustion with FPGA enabled control  

Science Journals Connector (OSTI)

Sophisticated engine controls have progressively become vital enablers for implementing clean and efficient combustion. The low temperature combustion in diesel engines is a viable combustion mode that offers ultra-low nitrogen oxides and dry soot emissions, yet only feasible under tightly controlled operating conditions. In this work, the dual fuel application of ethanol and diesel is studied for clean and efficient combustion. A set of real-time controllers has been configured to control the common-rail pressure and injection events, in concert with the use of two fuels in a high compression ratio diesel engine. An improved control algorithm has been implemented into the field programmable gate array devices to promptly execute the injection commands of the port and direct injection events. Such reliable and prompt control of fuel injection has been identified as critical to safely enable simultaneously low nitrogen oxides and soot combustion, especially when excessive or inadequate rate of exhaust gas recirculation is imminent. High load clean combustion was achieved with the improved control system.

Xiaoye Han; Jimi Tjong; Graham T. Reader; Ming Zheng

2014-01-01T23:59:59.000Z

230

Dual-etalon, cavity-ring-down, frequency comb spectroscopy.  

SciTech Connect

The 'dual etalon frequency comb spectrometer' is a novel low cost spectometer with limited moving parts. A broad band light source (pulsed laser, LED, lamp ...) is split into two beam paths. One travels through an etalon and a sample gas, while the second arm is just an etalon cavity, and the two beams are recombined onto a single detector. If the free spectral ranges (FSR) of the two cavities are not identical, the intensity pattern at the detector with consist of a series of heterodyne frequencies. Each mode out of the sample arm etalon with have a unique frequency in RF (radio-frequency) range, where modern electronics can easily record the signals. By monitoring these RF beat frequencies we can then determine when an optical frequencies is absorbed. The resolution is set by the FSR of the cavity, typically 10 MHz, with a bandwidth up to 100s of cm{sup -1}. In this report, the new spectrometer is described in detail and demonstration experiments on Iodine absorption are carried out. Further we discuss powerful potential next generation steps to developing this into a point sensor for monitoring combustion by-products, environmental pollutants, and warfare agents.

Strecker, Kevin E.; Chandler, David W.

2010-10-01T23:59:59.000Z

231

Indirect-fired gas turbine dual fuel cell power cycle  

DOE Patents (OSTI)

A fuel cell and gas turbine combined cycle system which includes dual fuel cell cycles combined with a gas turbine cycle wherein a solid oxide fuel cell cycle operated at a pressure of between 6 to 15 atms tops the turbine cycle and is used to produce CO.sub.2 for a molten carbonate fuel cell cycle which bottoms the turbine and is operated at essentially atmospheric pressure. A high pressure combustor is used to combust the excess fuel from the topping fuel cell cycle to further heat the pressurized gas driving the turbine. A low pressure combustor is used to combust the excess fuel from the bottoming fuel cell to reheat the gas stream passing out of the turbine which is used to preheat the pressurized air stream entering the topping fuel cell before passing into the bottoming fuel cell cathode. The CO.sub.2 generated in the solid oxide fuel cell cycle cascades through the system to the molten carbonate fuel cell cycle cathode.

Micheli, Paul L. (Sacramento, CA); Williams, Mark C. (Morgantown, WV); Sudhoff, Frederick A. (Morgantown, WV)

1996-01-01T23:59:59.000Z

232

Dual energy scanning beam laminographic x-radiography  

DOE Patents (OSTI)

A multiple x-ray energy level imaging system includes a scanning x-ray beam and two detector design having a first low x-ray energy sensitive detector and a second high x-ray energy sensitive detector. The low x-ray energy detector is placed next to or in front of the high x-ray energy detector. The low energy sensitive detector has small stopping power for x-rays. The lower energy x-rays are absorbed and converted into electrical signals while the majority of the higher energy x-rays pass through undetected. The high energy sensitive detector has a large stopping power for x-rays as well as it having a filter placed between it and the object to absorb the lower energy x-rays. In a second embodiment; a single energy sensitive detector is provided which provides an output signal proportional to the amount of energy in each individual x-ray it absorbed. It can then have an electronic threshold or thresholds set to select two or more energy ranges for the images. By having multiple detectors located at different positions, a dual energy laminography system is possible.

Majewski, Stanislaw (Grafton, VA); Wojcik, Randolph F. (Yorktown, VA)

1998-01-01T23:59:59.000Z

233

Dual energy scanning beam laminographic x-radiography  

DOE Patents (OSTI)

A multiple x-ray energy level imaging system includes a scanning x-ray beam and two detector design having a first low x-ray energy sensitive detector and a second high x-ray energy sensitive detector. The low x-ray energy detector is placed next to or in front of the high x-ray energy detector. The low energy sensitive detector has small stopping power for x-rays. The lower energy x-rays are absorbed and converted into electrical signals while the majority of the higher energy x-rays pass through undetected. The high energy sensitive detector has a large stopping power for x-rays as well as it having a filter placed between it and the object to absorb the lower energy x-rays. In a second embodiment; a single energy sensitive detector is provided which provides an output signal proportional to the amount of energy in each individual x-ray it absorbed. It can then have an electronic threshold or thresholds set to select two or more energy ranges for the images. By having multiple detectors located at different positions, a dual energy laminography system is possible. 6 figs.

Majewski, S.; Wojcik, R.F.

1998-04-21T23:59:59.000Z

234

Can we discover dual-component thermal WIMP dark matter?  

SciTech Connect

We address the question of whether the upcoming generation of dark matter search experiments and colliders will be able to discover if the dark matter in the Universe has two components of weakly interacting massive particles (WIMPs). We outline a model-independent approach, and we study the specific cases of (1) direct detection with low-background 1 ton noble-gas detectors and (2) a 0.5 TeV center of mass energy electron-positron linear collider. We also analyze the case of indirect detection via two gamma-ray lines, which would provide a verification of such a discovery, although multiple gamma-ray lines can in principle originate from the annihilation of a single dark matter particle. For each search ''channel'', we outline a few assumptions to relate the very small set of parameters we consider (defining the masses of the two WIMPs and their relative abundance in the overall dark matter density) with the relevant detection rates. We then draw general conclusions on which corners of a generic dual-component dark matter scenario can be explored with current and next generation experiments. We find that in all channels the ideal setup is one where the relative mass splitting between the two WIMP species is of order 1, and where the two dark matter components contribute in a ratio close to 1:1 to the overall dark matter content of the Universe. Interestingly, in the case of direct detection, future experiments might detect multiple states even if only ? 10% of the energy-density of dark matter in the Universe is in the subdominant species.

Profumo, Stefano; Ubaldi, Lorenzo [Santa Cruz Institute for Particle Physics and Department of Physics, University of California, Santa Cruz CA 95064 (United States); Sigurdson, Kris, E-mail: profumo@scipp.ucsc.edu, E-mail: krs@physics.ubc.ca, E-mail: ubaldi@physics.ucsc.edu [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada)

2009-12-01T23:59:59.000Z

235

Stimulated dual-band infrared computed tomography: A tool to inspect the aging infrastructure  

SciTech Connect

The authors have developed stimulated dual-band infrared (IR) computed tomography as a tool to inspect the aging infrastructure. The system has the potential to locate and quantify structural damage within airframes and bridge decks. Typically, dual-band IR detection methods improve the signal-to-noise ratio by a factor of ten, compared to single-band IR detection methods. They conducted a demonstration at Boeing using a uniform pulsed-heat source to stimulate IR images of hidden defects in the 727 fuselage. The dual-band IR camera and image processing system produced temperature, thermal inertia, and cooling-rate maps. In combination, these maps characterized the defect site, size, depth, thickness and type. The authors quantified the percent metal loss from corrosion above a threshold of 5%, with overall uncertainties of 3%. Also, they conducted a feasibility study of dual-band IR thermal imaging for bridge deck inspections. They determined the sites and relative concrete displacement of 2-in. and 4-in. deep delaminations from thin styrofoam implants in asphalt-covered concrete slabs. They demonstrated the value of dual-band IR computed tomography to quantify structural damage within flash-heated airframes and naturally-heated bridge decks.

Del Grande, N.K.; Durbin, P.F.

1995-06-27T23:59:59.000Z

236

Exergy analysis of combustion characteristics and NOx emissions of a dual-fuel engine  

Science Journals Connector (OSTI)

The combustion characteristics and NOx emissions of compression ignition engines working on a dual fuel mode are investigated numerically and their exergetic efficiencies are determined. The model has been validated with available experimental results. The simulation results show that dual fuel engine combustion and trend of NOx emissions are well predicted by the present model. Parametric study showed improvements in engine performance and an increase in NOx emissions with decreased advanced injection timing of the pilot fuel as well as with increased intake temperature and pilot fuel quantity. The maximum values for energy and exergy are found to be comparable.

Mohamed H. Morsy; Abdelrahman El-Leathy; Arif Hepbasli

2012-01-01T23:59:59.000Z

237

5D actions for 6D self-dual tensor field theory  

Science Journals Connector (OSTI)

We present two equivalent five-dimensional actions for six-dimensional (N,0) N=1,2 supersymmetric theories of a self-dual tensor whose one spatial dimension is compactified on a circle. The Kaluza-Klein tower consists of a massless vector and an infinite number of massive self-dual tensor multiplets living in five dimensions. The self-duality follows from the equation of motion. Both actions are quadratic in field variables without any auxiliary field. When lifted back to six dimensions, one of them gives a supersymmetric extension of the bosonic formulation for the chiral two-form tensor by Perry and Schwarz.

Kimyeong Lee and Jeong-Hyuck Park

2001-10-12T23:59:59.000Z

238

Dual cure low-VOC coating process. Final technical report, Phase 3  

SciTech Connect

US EPA is implementing increasingly stringent environmental regulations on the emissions of volatile organic compounds (VOCs), which amount to about 7 {times} 10{sup 9} lb/year, largely from paints and other coating systems in industry. Objective of this project is to develop Dual Cure Photocatalyst coating technology for aerospace topcoats (urethane/acrylate), aerospace primers (epoxy/acrylate), and solventless tape backings. Some problems (moisture etc.) were encountered in the primer area. Cost, economic, and energy analyses were conducted. The dual cure technology has already been commercialized in 3M`s flexible diamond resin products. Tabs.

Kinzer, K.E.

1993-12-01T23:59:59.000Z

239

A study on the dual-phase treatment of weathering steel 09CuPCrNi  

Science Journals Connector (OSTI)

Dual-phase treatment processes, the resultant microstructures and the corresponding mechanical behavior and properties of weathering steel 09CuPCrNi have been studied. The results show that the microstructures of weathering steel 09CuPCrNi after intercritical quenching are characterized by an irregular distribution of island-shaped martensite in the matrix of equi-axed ferrite grains. Favorable mechanical properties and cold formability can be obtained through the intercritical quenching at 780 °C. The dual-phase-treated steel is superior in weldability to the as-received hot-rolled steel and its atmospheric corrosion resistance is better than that of the original.

Chunling Zhang; Dayong Cai; Bo Liao; Tianchen Zhao; Yunchang Fan

2004-01-01T23:59:59.000Z

240

Target duality in N=?8 superconformal mechanics and the coupling of dual pairs  

SciTech Connect

We couple dual pairs of N=?8 superconformal mechanics with conical targets of dimension d and 8?d. The superconformal coupling generates an oscillator-type potential on each of the two target factors, with a frequency depending on the respective dual coordinates. In the case of the inhomogeneous (3,8,5) model, which entails a monopole background, it is necessary to add an extra supermultiplet of constants for half of the supersymmetry. The N=?4 analog, joining an inhomogeneous (1,4,3) with a (3,4,1) multiplet, is also analyzed in detail.

Gonzales, Marcelo [Carrera de Física Universidad Autónoma Tomás Frías, Av. Del Maestro s/n, Casilla 36, Potosí (Bolivia, Plurinational State of)] [Carrera de Física Universidad Autónoma Tomás Frías, Av. Del Maestro s/n, Casilla 36, Potosí (Bolivia, Plurinational State of); Khodaee, Sadi; Toppan, Francesco [TEO, CBPF Rua Dr. Xavier Sigaud 150 (Urca), Rio de Janeiro (RJ), cep 22290-180 (Brazil)] [TEO, CBPF Rua Dr. Xavier Sigaud 150 (Urca), Rio de Janeiro (RJ), cep 22290-180 (Brazil); Lechtenfeld, Olaf [Institut für Theoretische Physik and Riemann Center for Geometry and Physics, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover (Germany) [Institut für Theoretische Physik and Riemann Center for Geometry and Physics, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover (Germany); Centre for Quantum Engineering and Space-Time Research, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover (Germany)

2013-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Annex to the agreement on CLUSTER Dual Masters between IST and KTH Master Program on Systems, Control and Robotics (SCR)  

E-Print Network (OSTI)

, Control and Robotics (SCR) B-1/4 Appendix B: Dual Degree Agreement between Instituto Superior Técnico (IST on Systems, Control and Robotics (SCR) B-2/4 This page is intentionally left blank #12;Annex to the agreement on CLUSTER Dual Masters between IST and KTH Master Program on Systems, Control and Robotics (SCR) B-3/4 FIRST

Instituto de Sistemas e Robotica

242

Characterization of ceramic coating on ZK60 magnesium alloy prepared in a dual electrolyte system by micro-arc oxidation  

Science Journals Connector (OSTI)

Micro-arc oxidation (MAO) process was carried out in...2O4 and MgO are the main phases of ceramic coating obtained in the dual electrolyte system. The corrosion rate of coating prepared in the optimized dual elec...

Ze-Xin Wang; Wei-Gang Lv; Jing Chen; Sheng Lu

2013-10-01T23:59:59.000Z

243

LABORATORY EVALUATION OF THREE RAPID DIAGNOSTIC TESTS FOR THE DUAL DETETION OF HIV AND TREPONEMA PALLIDUM ANTIBODIES  

Science Journals Connector (OSTI)

...research-article LABORATORY EVALUATION OF THREE RAPID DIAGNOSTIC TESTS FOR THE DUAL DETETION OF HIV AND TREPONEMA PALLIDUM ANTIBODIES...three research use only, dual HIV and syphilis rapid diagnostic tests (RDTs) was evaluated for 150 patient serum samples, as compared...

Romney M. Humphries; Jennifer S Woo; Jun Ho Chung; Anita Sokovic; Claire C. Bristow; Jeffrey D. Klausner

2014-10-08T23:59:59.000Z

244

High-Performance Integrated Dual-Gate AlGaN/GaN Enhancement-Mode Transistor  

E-Print Network (OSTI)

In this letter, we present a new AlGaN/GaN enhancement-mode (E-mode) transistor based on a dual-gate structure. The dual gate allows the transistor to combine an E-mode behavior with low on-resistance and very high breakdown ...

Lu, Bin

245

268 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 9, 2010 Dual-Band Miniaturized Patch Antennas for  

E-Print Network (OSTI)

268 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 9, 2010 Dual-Band Miniaturized Patch a miniaturized, dual-band patch antenna array element that is designed for use in a three-dimensional (3-D the fundamental reso- nant mode of the patch antenna and one of its higher order modes. Miniaturization and tuning

Sheridan, Jennifer

246

Nonequilibrium atmospheric pressure plasma jet using a combination of 50?kHz/2?MHz dual-frequency power sources  

Science Journals Connector (OSTI)

An atmospheric pressure plasma jet is generated by dual sinusoidal wave (50?kHz and 2?MHz). The dual-frequency plasma jet exhibits the advantages of both low frequency and radio frequency plasmas namely the long plasma plume and the high electron density. The radio frequency ignition voltage can be reduced significantly by using dual-frequency excitation compared to the conventional radio frequency without the aid of the low frequency excitation source. A larger operating range of ? mode discharge can be obtained using dual-frequency excitation which is important to obtain homogeneous and low-temperature plasma. A larger controllable range of the gas temperature of atmospheric pressure plasma could also be obtained using dual-frequency excitation.

Yong-Jie Zhou; Qiang-Hua Yuan; Fei Li; Xiao-Min Wang; Gui-Qin Yin; Chen-Zhong Dong

2013-01-01T23:59:59.000Z

247

Comparison of dual-energy CT-derived iodine content and iodine overlay of normal, inflammatory and metastatic squamous cell carcinoma cervical lymph nodes  

Science Journals Connector (OSTI)

To evaluate whether dual-energy computed tomography (DECT)-derived iodine content and iodine overlay could differentiate between normal,...

Ahmed M. Tawfik; A. A. Razek; J. Matthias Kerl; N. E. Nour-Eldin…

2014-03-01T23:59:59.000Z

248

System-Level Logistics for Dual Purpose Canister Disposal  

SciTech Connect

The analysis presented in this report investigated how the direct disposal of dual purpose canisters (DPCs) may be affected by the use of standard transportation aging and disposal canisters (STADs), early or late start of the repository, and the repository emplacement thermal power limits. The impacts were evaluated with regard to the availability of the DPCs for emplacement, achievable repository acceptance rates, additional storage required at an interim storage facility (ISF) and additional emplacement time compared to the corresponding repackaging scenarios, and fuel age at emplacement. The result of this analysis demonstrated that the biggest difference in the availability of UNF for emplacement between the DPC-only loading scenario and the DPCs and STADs loading scenario is for a repository start date of 2036 with a 6 kW thermal power limit. The differences are also seen in the availability of UNF for emplacement between the DPC-only loading scenario and the DPCs and STADs loading scenario for the alternative with a 6 kW thermal limit and a 2048 start date, and for the alternatives with a 10 kW thermal limit and 2036 and 2048 start dates. The alternatives with disposal of UNF in both DPCs and STADs did not require additional storage, regardless of the repository acceptance rate, as compared to the reference repackaging case. In comparison to the reference repackaging case, alternatives with the 18 kW emplacement thermal limit required little to no additional emplacement time, regardless of the repository start time, the fuel loading scenario, or the repository acceptance rate. Alternatives with the 10 kW emplacement thermal limit and the DPCs and STADs fuel loading scenario required some additional emplacement time. The most significant decrease in additional emplacement time occurred in the alternative with the 6 kW thermal limit and the 2036 repository starting date. The average fuel age at emplacement ranges from 46 to 88 years. The maximum fuel age at emplacement ranges from 81 to 146 years. The difference in the average and maximum age of fuel at emplacement between the DPC-only and the DPCs and STADs fuel loading scenarios becomes less significant as the repository thermal limit increases and as the repository start date increases. In general, the role of STADs is to store young (30 year or younger) high burnup (45 GWD/MTU or higher) fuel. Recommendations for future study include detailed evaluation of the feasible alternatives with regard to the costs and factors not considered in this analysis, such as worker dose, dose to members of the public, and economic benefits to host entities. It is also recommended to conduct an additional analysis to evaluate the assumption regarding the transportability and disposability of DPCs for the next iteration of the direct disposal of DPCs study.

Kalinina, Elena A.

2014-06-03T23:59:59.000Z

249

A Sensor-Based Dual-Arm Tele-Robotic System Daniel Kruse, Student Member, IEEE, John T. Wen, Fellow, IEEE, and Richard J. Radke, Senior Member, IEEE  

E-Print Network (OSTI)

1 A Sensor-Based Dual-Arm Tele-Robotic System Daniel Kruse, Student Member, IEEE, John T. Wen coordinated task-based control on a dual-arm industrial robot for the gen- eral tasks of visual servoing. The specific experimental testbed involves a 15 degree-of- freedom dual-arm industrial robot with each wrist

Radke, Rich

250

Abstract--A widespread application of impedance control in dual-arm robotic systems is still a challenging problem. One of limitations is  

E-Print Network (OSTI)

Abstract-- A widespread application of impedance control in dual- arm robotic systems is still provides efficient and flexible algorithms and tools which considerably facilitate future dual-arm robot and users for this new class of robotic systems. The main advantages and benefits of dual arm-robots over

251

Phase-field modeling of corrosion kinetics under dual-oxidants This article has been downloaded from IOPscience. Please scroll down to see the full text article.  

E-Print Network (OSTI)

Phase-field modeling of corrosion kinetics under dual-oxidants This article has been downloaded-field modeling of corrosion kinetics under dual-oxidants You-Hai Wen1 , Long-Qing Chen2 and Jeffrey A Hawk1 1 is proposed to simulate corrosion kinetics under a dual- oxidant atmosphere. It will be demonstrated

Chen, Long-Qing

252

Final joint environmental assessment for the construction and routine operation of a 12-kilovolt (KV) overhead powerline right-of-way, and formal authorization for a 10-inch and 8-inch fresh water pipeline right-of-way, Naval Petroleum Reserve No. 1, Kern County, California  

SciTech Connect

The purpose and need of the proposed action, which is the installation of an overhead powerline extension from an Naval Petroleum Reserve No. 1 (NPR-1) power source to the WKWD Station A, is to significantly reduce NPR-1`s overall utility costs. While the proposed action is independently justified on its own merits and is not tied to the proposed NPR-1 Cogeneration Facility, the proposed action would enable DOE to tie the NPR-1 fresh water pumps at Station A into the existing NPR-1 electrical distribution system. With the completion of the cogeneration facility in late 1994 or early 1995, the proposed action would save additional utility costs. This report deals with the environmental impacts of the construction of the powerline and the water pipeline. In addition, information is given about property rights and attaining permission to cross the property of proposed affected owners.

Not Available

1994-10-01T23:59:59.000Z

253

Team Work Matters: Dual Inhibition Puts Non-Hodgkin Lymphoma Under Siege  

Science Journals Connector (OSTI)

...ensues and combinatory therapies are sought to prevent it. Preclinical evaluation of dual...against NHL, paving the way for bench-to-bedside translation. Clin Cancer Res...most common subtype, accounting for 25% to 35% of all NHL. DLBCL is a heterogeneous...

Giada Bianchi and Irene M. Ghobrial

2014-12-01T23:59:59.000Z

254

On the Dual Effect in State-Based Scheduling of Networked Control Systems  

E-Print Network (OSTI)

On the Dual Effect in State-Based Scheduling of Networked Control Systems Chithrupa Ramesh, Henrik with state-based scheduling. In general, this makes the optimal scheduler and controller hard to find. However, by removing past controls from the scheduling criterion, we find that certainty equivalence holds

Johansson, Karl Henrik

255

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

Science Journals Connector (OSTI)

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

RADU PANTILIE; JOHN C. WOOD

2006-03-01T23:59:59.000Z

256

A New Dual-Polarization Radar Rainfall Algorithm: Application in Colorado Precipitation Events  

E-Print Network (OSTI)

A New Dual-Polarization Radar Rainfall Algorithm: Application in Colorado Precipitation Events R for a given set of polarimetric observables. For example, under what circumstances does differential phase in reflectivity? At Colorado State University (CSU), an optimization algorithm has been developed and used

Rutledge, Steven

257

A Simpler Primal-Dual Proof of Lawler's Algorithm Renato Paes Leme  

E-Print Network (OSTI)

A Simpler Primal-Dual Proof of Lawler's Algorithm Renato Paes Leme David B. Shmoys Abstract decomposition theorem of Sydney leads to a simple polynomial-time algorithm for series-parallel constraints, an efficient O(n log n) algorithm for scheduling with series-parallel con- straints was given by Lawler in 1978

Keinan, Alon

258

Dual-Porosity Hollow Nanoparticles for the Immunoprotection and Delivery of Nonhuman Enzymes  

E-Print Network (OSTI)

Dual-Porosity Hollow Nanoparticles for the Immunoprotection and Delivery of Nonhuman Enzymes Inanc 80045, United States *S Supporting Information ABSTRACT: Although enzymes of nonhuman origin have been attack on nonhuman enzymes paving the way to in vivo applications including enzyme-prodrug therapies

Tsien, Roger Y.

259

High-energy kHz Yb:KYW dual-crystal regenerative amplifier  

Science Journals Connector (OSTI)

A highly stable Yb:KYW based dual crystal regenerative amplifier is demonstrated, which generates at 1 kHz 6.5-mJ pulses before and up to 4.7-mJ sub-ps pulses after compression with...

Calendron, Anne-Laure; Çankaya, Hüseyin; Kärtner, Franz X

2014-01-01T23:59:59.000Z

260

An Efficient Dual Algorithm for Vectorless Power Grid Verification under Linear Current Constraints  

E-Print Network (OSTI)

An Efficient Dual Algorithm for Vectorless Power Grid Verification under Linear Current Constraints, Chicago, IL 60616, USA ABSTRACT Vectorless power grid verification makes it possible to eval- uate worst, the vectorless power grid verification problem can be formulated and solved as a linear programming (LP) problem

Wang, Jia

Note: This page contains sample records for the topic "4-valve dual overhead" 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

A Dual Strategy to Cope with High Light in Chlamydomonas reinhardtii W  

E-Print Network (OSTI)

A Dual Strategy to Cope with High Light in Chlamydomonas reinhardtii W Guillaume Allorent,a,b,c,d,1, Département des Sciences de la Vie, Université de Liège, B-4000 Liege, Belgium l Howard Hughes Medical Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720-3102 Absorption of light

262

Enhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n  

E-Print Network (OSTI)

of Mechanical Engineering, State University of New York at Stony Brook, Stony Brook, NY 11794, USA a r t i c l eEnhanced vibration energy harvesting using dual-mass systems Xiudong Tang, Lei Zuo n Department-mass vibration energy harvester, where two masses are connected in series with the energy transducer and spring

Zuo, Lei

263

LM193/LM293/LM393/LM2903 Low Power Low Offset Voltage Dual Comparators  

E-Print Network (OSTI)

LM193/LM293/LM393/LM2903 Low Power Low Offset Voltage Dual Comparators General Description The LM clock timers; multivibrators and high voltage digital logic gates. The LM193 series was designed to directly interface with TTL and CMOS. When operated from both plus and minus power supplies, the LM193

Lanterman, Aaron

264

LM158/LM258/LM358/LM2904 Low Power Dual Operational Amplifiers  

E-Print Network (OSTI)

LM158/LM258/LM358/LM2904 Low Power Dual Operational Amplifiers General Description The LM158 series systems. For example, the LM158 series can be directly operated off of the standard +5V power supply without requiring the additional ±15V power supplies. The LM358 and LM2904 are available in a chip sized

Lanterman, Aaron

265

Tip Vortex Field Resolution Using an Adaptive Dual-Mesh Computational Nathan Hariharan  

E-Print Network (OSTI)

for the aforementioned unsteady, vortical fields. 1. Introduction 1.1 Background Vortical wakes introduce important AMR in an unstructured Euler solver. Potsdam[3] also applied unstructured AMR to wind turbine wake1 Tip Vortex Field Resolution Using an Adaptive Dual-Mesh Computational Paradigm Nathan Hariharan

Steffen, Michael

266

Top hole drilling with dual gradient technology to control shallow hazards  

E-Print Network (OSTI)

3.2 Riserless Dual Gradient Drilling Technology Description .........................36 3.2.1 Kick Detection.............................................................................37 3.2.2 Well Control ?Modified Driller?s Method... ? PRESSURE @ TOP OF KICK GRAPHS ? SET #1..........................140 ix Page APPENDIX F ? PRESSURE @ TOP OF KICK GRAPHS ? SET #2 ..........................159 VITA...

Elieff, Brandee Anastacia Marie

2006-10-30T23:59:59.000Z

267

Dual Fuel Diesel Engine Operation Using H2. Effect on Particulate Emissions  

Science Journals Connector (OSTI)

Dual Fuel Diesel Engine Operation Using H2. ... School of Engineering, Mechanical and Manufacturing Engineering, The University of Birmingham, Birmingham B15 2TT, United Kingdom, Universidad de Castilla?La Mancha, Edificio Politecnico, Escuela Tecnica Superior de Ingenieros Industriales, Avda. ... In diesel engines, the reduction of particulate emissions must be achieved in conjunction with the reduction of NOx emissions. ...

A. Tsolakis; J. J. Hernandez; A. Megaritis; M. Crampton

2005-01-11T23:59:59.000Z

268

A Comparative Study of New Barrier Functions for Primal-Dual ...  

E-Print Network (OSTI)

Up till now primal-dual IPMs all use the Newton direction as the search ... in terms of the kernel function and its first and second derivative. .... outer iteration by performing a5k -update, otherwise we enter an inner iteration by computing.

269

A Comparison of Non-stationary, Type-2 and Dual Surface Fuzzy Control  

E-Print Network (OSTI)

,uxa,jmg]@cs.nott.ac.uk Abstract--Type-1 fuzzy logic has frequently been used in control systems. However this method is sometimes and fuzzy logic to automate system controllers. The underpinning technique of fuzzy logic was originallyA Comparison of Non-stationary, Type-2 and Dual Surface Fuzzy Control Naisan Benatar, Uwe Aickelin

Aickelin, Uwe

270

CA3240, CA3240A Dual, 4.5MHz, BiMOS Operational Amplifier  

E-Print Network (OSTI)

with the industry standard 1458 operational amplifiers in similar packages. Functional Diagram Features · Dual Pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination1050.6 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling

Lanterman, Aaron

271

Dual-UEGO Active Catalyst Control for Emissions Reduction: Design and Experimental Validation  

E-Print Network (OSTI)

Dual-UEGO Active Catalyst Control for Emissions Reduction: Design and Experimental Validation three-way catalysts and two oxygen sensors. The control objective is to maximize the simultaneous are used to measure air-fuel ratio upstream and downstream of each catalyst. A series controller

Grizzle, Jessy W.

272

Peak Demand Reduction with Dual-Source Heat Pumps Using Municipal Water  

E-Print Network (OSTI)

The objective of this project was to examine a dual-source (air and/or water-coupled) heat pump concept which would reduce or eliminate the need for supplemental electrical resistance heating (strip heaters). The project examined two system options...

Morehouse, J. H.; Khan, J. A.; Connor, L. N.; Pal, D.

273

Effect of dual frequency on the plasma characteristics in an internal linear inductively coupled plasma source  

SciTech Connect

An internal-type linear inductive antenna, referred to as a ''double comb-type antenna,'' was used as a large area plasma source with a substrate size of 880x660 mm{sup 2} (fourth generation glass size). The effects of the dual frequency (2 and 13.56 MHz) radio frequency (rf) power to the antenna as well as the power ratio on the plasma characteristics were investigated. High-density plasma on the order of 1.7x10{sup 11} cm{sup -3} could be obtained with a dual frequency power of 5 kW (13.56 MHz) and 1 kW (2 MHz) at a pressure of 15 mTorr Ar. This plasma density was lower than that obtained for the double comb-type antenna using a single frequency alone (5 kW, 13.56 MHz). However, the use of the dual frequency with a rf power ratio of approximately 1(2 MHz):5(13.56 MHz) showed better plasma uniformity than that obtained using the single frequency. Plasma uniformity of 6.1% could be obtained over the substrate area. Simulations using FL2L code confirmed the improvement in the plasma uniformity using the dual frequency to the double comb-type antenna.

Kim, K. N.; Lim, J. H.; Yeom, G. Y.; Lee, S. H.; Lee, J. K. [Department of Materials Science and Engineering, Sungkyunkwan University, Suwon, Kyunggi-do 440-746 (Korea, Republic of); Department of Electronic and Electrical Engineering, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of)

2006-12-18T23:59:59.000Z

274

Advanced Materials for Reversible Solid Oxide Fuel Cell (RSOFC), Dual Mode Operation with Low  

E-Print Network (OSTI)

Advanced Materials for Reversible Solid Oxide Fuel Cell (RSOFC), Dual Mode Operation with Low, Director Product Development & Federal Programs #12;Project Background f Reversible Solid Oxide Fuel Cells:Water The VPS Storage f Wind Fuel Cell / f Solar Electrolyzer Continuous SOFC Intermittent Power Power

275

Gemstone Detector: Dual Energy Imaging via Fast kVp Switching  

Science Journals Connector (OSTI)

This chapter provides an overview of the GE Discovery CT750HD dual energy imaging capability known as gemstone spectral imaging (GSI). The CT750HD is a single X-ray source system that employs fast kVp switching f...

Naveen Chandra; David A. Langan

2011-01-01T23:59:59.000Z

276

Dual-decay converter for switched reluctance motor drives in low-voltage applications  

SciTech Connect

A modified converter topology for star-connected switched reluctance motors suitable for low-voltage applications is proposed in this paper. A dual time constant freewheeling circuit has been designed to improve the drive performance and efficiency over a wide range of speeds. The different modes of operation of the converter are discussed, and a comparison is made with other converter configurations.

Ehsani, Mehrdad; Husain, Iqbal; Ramani, K.R. (Texas A and M Univ., College Station, TX (United States). Dept. of Electrical Engineering); Galloway, J.H. (J.H. Galloway and Associates, Brookfield, CT (United States))

1993-04-01T23:59:59.000Z

277

Gender ideology: impact on dual-career couples' role strain, marital satisfaction, and life satisfaction  

E-Print Network (OSTI)

............................................ 122 VITA.................................................. 126 xiii LIST OF TABLES TABLE Page 1 Sample Demographics........................... 36 2 Descriptive Statistics for Continuous Variable Measures.... 2 implementing family-friendly work policies such as flextime (Galinsky et al., 1996). This lack of family-oriented policies takes an important social, psychological, and physical toll on millions of dual-career couples. One of the most...

King, Jennifer Jean

2006-04-12T23:59:59.000Z

278

Comparison of propane and methane performance and emissions in a turbocharged direct injection dual fuel engine  

SciTech Connect

With increasingly restrictive NO x and particulate matter emissions standards, the recent discovery of new natural gas reserves, and the possibility of producing propane efficiently from biomass sources, dual fueling strategies have become more attractive. This paper presents experimental results from dual fuel operation of a four-cylinder turbocharged direct injection (DI) diesel engine with propane or methane (a natural gas surrogate) as the primary fuel and diesel as the ignition source. Experiments were performed with the stock engine control unit at a constant speed of 1800 rpm, and a wide range of brake mean effective pressures (BMEPs) (2.7-11.6 bars) and percent energy substitutions (PESs) of C 3 H 8 and CH 4. Brake thermal efficiencies (BTEs) and emissions (NO x, smoke, total hydrocarbons (THCs), CO, and CO 2) were measured. Maximum PES levels of about 80-95% with CH 4 and 40-92% with C 3 H 8 were achieved. Maximum PES was limited by poor combustion efficiencies and engine misfire at low loads for both C 3 H 8 and CH 4, and the onset of knock above 9 bar BMEP for C 3 H 8. While dual fuel BTEs were lower than straight diesel BTEs at low loads, they approached diesel BTE values at high loads. For dual fuel operation, NO x and smoke reductions (from diesel values) were as high as 66-68% and 97%, respectively, but CO and THC emissions were significantly higher with increasing PES at all engine loads

Gibson, C. M.; Polk, A. C.; Shoemaker, N. T.; Srinivasan, K. K.; Krishnan, S. R.

2011-04-20T23:59:59.000Z

279

DUAL-DEGREE PHYSICS/ENGINEERING AT AUBURN Department Course Course Name Credits Required Term  

E-Print Network (OSTI)

engineering, industrial engineering, materials engineering, mechanical engineering, textile chemistry, textileDUAL-DEGREE PHYSICS/ENGINEERING AT AUBURN Department Course Course Name Credits Required Term 1 Chemistry 1101/1110 Introductory Chemistry I & Lab 4 *11021120 Introductory Chemistry II & Lab 4

Thaxton, Christopher S.

280

MSc Marketing Accreditation Nottingham Business School's MSc Marketing has a Dual Award with the Chartered  

E-Print Network (OSTI)

MSc Marketing Accreditation Nottingham Business School's MSc Marketing has a Dual Award with the Chartered Institute of Marketing (CIM). By working with the Chartered Institute of Marketing to ensure Business School has created an MSc in Marketing which will increase your employability and ability

Evans, Paul

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Accurate model-based high resolution cardiac image reconstruction in dual source CT  

Science Journals Connector (OSTI)

Cardiac imaging represents one of the most challenging imaging problems, requiring high spatial and temporal resolutions along with good tissue contrast. One of the newest clinical cardiac CT scanners incorporates two source-detector pairs in order to ... Keywords: cardiac, dual source CT, iterative method, model-based imaging

Synho Do; Sanghee Cho; W. Clem Karl; Mannudeep K. Kalra; Thomas J. Brady; Homer Pien

2009-06-01T23:59:59.000Z

282

Advanced semiconductor fabrication process control using dual filter exponentially weighted moving average  

Science Journals Connector (OSTI)

Semiconductor industry needs to meet high standards to ensure survival and success in the 21st century. Rising expectations from the customers are demanding the semiconductor industry to manufacture products with both accuracy and precision. To comply ... Keywords: Dual filter EWMA, EWMA, Process control, Run-to-run, Semiconductor fabrication process

Hyo-Heon Ko; Jihyun Kim; Sang-Hoon Park; Jun-Geol Baek; Sung-Shick Kim

2012-06-01T23:59:59.000Z

283

Photothermal Response in Dual-Gated Bilayer Graphene M.-H. Kim,1  

E-Print Network (OSTI)

Photothermal Response in Dual-Gated Bilayer Graphene M.-H. Kim,1 J. Yan,1,2 R. J. Suess,3 T. E photoresponse in gapped bilayer graphene was investigated by optical and transport measurements. A pulse There is growing recognition that graphene has excep- tional potential as a new optoelectronic material, which has

Murphy, Thomas E.

284

IRAN UNDER MONGOL DOMINATION The effectiveness and failings of a dual administrative system  

E-Print Network (OSTI)

IRAN UNDER MONGOL DOMINATION The effectiveness and failings of a dual administrative system Denise, as countries with a long sedentary tradition, such as China and Iran, were made subject to a single people of the steppes for over a century.4 THE CONQUEST OF THE IRANIAN LANDS Iran had suffered other major invasions

Paris-Sud XI, Université de

285

Identification and compensation of friction for a dual stage positioning system  

E-Print Network (OSTI)

increases the accuracy of the read/write head in hard disk drives. A scaled up version of the dual stage actuator is considered as the test bed for this thesis. Friction is present in all electromechanical systems. This thesis deals with modelling...

Thimmalapura, Satish Voddina

2005-11-01T23:59:59.000Z

286

The dual-mirror Small Size Telescope for the Cherenkov Telescope Array  

E-Print Network (OSTI)

In this paper, the development of the dual mirror Small Size Telescopes (SST) for the Cherenkov Telescope Array (CTA) is reviewed. Up to 70 SST, with a primary mirror diameter of 4 m, will be produced and installed at the CTA southern site. These will allow investigation of the gamma-ray sky at the highest energies accessible to CTA, in the range from about 1 TeV to 300 TeV. The telescope presented in this contribution is characterized by two major innovations: the use of a dual mirror Schwarzschild-Couder configuration and of an innovative camera using as sensors either multi-anode photomultipliers (MAPM) or silicon photomultipliers (SiPM). The reduced plate-scale of the telescope, achieved with the dual-mirror optics, allows the camera to be compact (40 cm in diameter), and low-cost. The camera, which has about 2000 pixels of size 6x6 mm^2, covers a field of view of 10{\\deg}. The dual mirror telescopes and their cameras are being developed by three consortia, ASTRI (Astrofisica con Specchi a Tecnologia Repl...

Pareschi, G; Antonelli, L A; Bastieri, D; Bellassai, G; Belluso, M; Bigongiari, C; Billotta, S; Biondo, B; Bonanno, G; Bonnoli, G; Bruno, P; Bulgarelli, A; Canestrari, R; Capalbi, M; Caraveo, P; Carosi, A; Cascone, E; Catalano, O; Cereda, M; Conconi, P; Conforti, V; Cusumano, G; De Caprio, V; De Luca, A; Di Paola, A; Di Pierro, F; Fantinel, D; Fiorini, M; Fugazza, D; Gardiol, D; Ghigo, M; Gianotti, F; Giarrusso, S; Giro, E; Grillo, A; Impiombato, D; Incorvaia, S; La Barbera, A; La Palombara, N; La Parola, V; La Rosa, G; Lessio, L; Leto, G; Lombardi, S; Lucarelli, F; Maccarone, M C; Malaguti, G; Malaspina, G; Mangano, V; Marano, D; Martinetti, E; Millul, R; Mineo, T; MistÒ, A; Morello, C; Morlino, G; Panzera, M R; Rodeghiero, G; Romano, P; Russo, F; Sacco, B; Sartore, N; Schwarz, J; Segreto, A; Sironi, G; Sottile, G; Stamerra, A; Strazzeri, E; Stringhetti, L; Tagliaferri, G; Testa, V; Timpanaro, M C; Toso, G; Tosti, G; Trifoglio, M; Vallania, P; Vercellone, S; Zitelli, V; Amans, J P; Boisson, C; Costille, C; Dournaux, J L; Dumas, D; Fasola, G; Hervet, O; Huet, J M; Laporte, P; Rulten, C; Sol, H; Zech, A; White, R; Hinton, J; Ross, D; Sykes, J; Ohm, S; Schmoll, J; Chadwick, P; Greenshaw, T; Daniel, M; Cotter, G; Varner, G S; Funk, S; Vandenbroucke, J; Sapozhnikov, L; Buckley, J; Moore, P; Williams, D; Markoff, S; Vink, J; Berge, D; Hidaka, N; Okumura, A; Tajima, H

2013-01-01T23:59:59.000Z

287

Approximation free approach to dual-scale problems : Calculating the electronic structure of molecules using multigrid  

E-Print Network (OSTI)

Approximation free approach to dual-scale problems : Calculating the electronic structure, 2010 Since the dawn of quantum mechanical calculations for materials, describing the electronic to be reevaluated. This brings about a need to perform all-electron calculations that do not involve any

Adler, Joan

288

A Dual-Polarization Radar Hydrometeor Classification Algorithm for Winter Precipitation  

E-Print Network (OSTI)

associated with winter storm precipitation type, accumulation, and timing is a major forecasting, safetyA Dual-Polarization Radar Hydrometeor Classification Algorithm for Winter Precipitation ELIZABETH J The purpose of this study is to demonstrate the use of polarimetric observations in a radar-based winter

Collett Jr., Jeffrey L.

289

A dual-polarization radar hydrometeor classification algorithm for winter precipitation1 Elizabeth J. Thompson*1  

E-Print Network (OSTI)

uncertainty associated with winter storm precipitation type, accumulation and36 timing is a paramount1 A dual-polarization radar hydrometeor classification algorithm for winter precipitation1 2 winter hydrometeor types (except sleet and freezing rain) based solely on polarimetric data, with29

Rutledge, Steven

290

Energy performance of a dual airflow window under different climates Jingshu Wei1  

E-Print Network (OSTI)

great po tential in conserving energy in buildings and provide fresh air to improve indoor air qua lity that by shading solar radiation. The dual airflow window is recomm ended for colder climate. If improving air airflow window; Energy demand; Indoor air quality; Different climates 1. Introduction Energy dem

Chen, Qingyan "Yan"

291

A Dual-Band Antenna for WLAN Applications by Double Rectangular Patch with 4-Bridges  

E-Print Network (OSTI)

A Dual-Band Antenna for WLAN Applications by Double Rectangular Patch with 4-Bridges Chang won Jung, Irvine, Irvine, CA, 92697, USA Abstract: Double rectangular patch with 4-bridges is investigated for solution of IEEE 802.11b/g (2.4GHz) and 802.11a (5.5GHz). Rectangular patch for 5.5GHz frequency band

De Flaviis, Franco

292

PRIMAL AND DUAL METHODS FOR UNIT COMMITMENT IN A HYDRO-THERMAL POWER SYSTEM  

E-Print Network (OSTI)

comprising thermal and pumped-storage hydro units a large-scale mixed-integer optimization model is developed of big coal red blocks with several pumped storage plants of di ering e ciencies provides the mainPRIMAL AND DUAL METHODS FOR UNIT COMMITMENT IN A HYDRO-THERMAL POWER SYSTEM R. Gollmer1 , A. Moller

Römisch, Werner

293

Active Vibration Control Based on a 3-DOF Dual Compliant Parallel Robot Using LQR Algorithm  

E-Print Network (OSTI)

Active Vibration Control Based on a 3-DOF Dual Compliant Parallel Robot Using LQR Algorithm Yuan a careful isolation of the instrument from the vibration sources by adopting active vibration isolation system to achieve a very low remaining vibration level especially for the very low frequency under 10Hz

Li, Yangmin

294

Canonical quantization of a minisuperspace model for gravity using self-dual variables  

E-Print Network (OSTI)

The present article summarizes the work of the papers \\cite{1} dealing with the quantization of pure gravity and gravity coupled to a Maxwell field and a cosmological constant in presence of spherical symmetry. The class of models presented is intended as an interesting testing ground for the quantization of full 3+1 gravity. We are working in Ashtekar's self-dual representation.

T. Thiemann

1999-10-04T23:59:59.000Z

295

Dual gas and oil dispersions in water: production and stability of foamulsion Anniina Salonen,*a  

E-Print Network (OSTI)

Dual gas and oil dispersions in water: production and stability of foamulsion Anniina Salonen of oil droplets and gas bubbles and show that the oil can have two very different roles, either suppressing foaming or stabilising the foam. We have foamed emulsions made from two different oils (rapeseed

Paris-Sud XI, Université de

296

Fermi-level shifts in graphene transistors with dual-cut channels scraped by atomic force microscope tips  

SciTech Connect

We investigate the electronic properties of p-type graphene transistors on silicon dioxide with dual-cut channels that were scraped using atomic force microscope tips. In these devices, the current is forced to squeeze into the path between the two cuts rather than flow directly through the graphene sheet. We observe that the gate voltages with minimum current shift toward zero bias as the sizes of the dual-cut regions increase. These phenomena suggest that the Fermi levels in the dual-cut regions are shifted toward the Dirac points after the mechanical scraping process.

Lin, Meng-Yu [Institute of Electronics, National Taiwan University, Taipei 10617, Taiwan (China); Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China); Chen, Yen-Hao [Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan (China); Su, Chen-Fung [College of Photonics, National Chiao Tung University, Tainan 71150, Taiwan (China); Chang, Shu-Wei [Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China); Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan (China); Lee, Si-Chen [Institute of Electronics, National Taiwan University, Taipei 10617, Taiwan (China); Lin, Shih-Yen, E-mail: shihyen@gate.sinica.edu.tw [Institute of Electronics, National Taiwan University, Taipei 10617, Taiwan (China); Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China); Department of Photonics, National Chiao Tung University, Hsinchu 30010, Taiwan (China)

2014-01-13T23:59:59.000Z

297

A Drop Size Distribution (DSD)-Based Model for Evaluating the Performance of Wet Radomes for Dual-Polarized Radars  

Science Journals Connector (OSTI)

A novel analytical method is presented for evaluating the electrical performance of a radome for a dual-polarized phased-array antenna under rain conditions. Attenuation, reflections, and induced cross polarization are evaluated for different ...

Jorge L. Salazar-Cerreño; V. Chandrasekar; Jorge M. Trabal; Paul Siquera; Rafael Medina; Eric Knapp; David J. McLaughlin

2014-11-01T23:59:59.000Z

298

Dual-fuel natural gas/diesel engines: Technology, performance, and emissions. Topical report, February 1993-November 1994  

SciTech Connect

An investigation of current dual-fuel natural gas/diesel engine design, performance, and emissions was conducted. The most pressing technological problems associated with dual-fuel engine use were identified along with potential solutions. It was concluded that dual-fuel engines can achieve low NOx and particulate emissions while retaining fuel-efficiency and BMEP levels comparable to those of diesel engines. The investigation also examined the potential economic impact of dual-fuel engines in diesel-electric locomotives, marine vessels, farm equipment, construction, mining, and industrial equipment, and stand-alone electricity generation systems. Recommendations for further additional funding to support research, development, and demonstration in these applications were then presented.

Turner, S.H.; Weaver, C.S.

1994-11-01T23:59:59.000Z

299

Assessment of the possibilities of the dual-energy X-ray absorptiometry of multicomponent samples with variable content  

Science Journals Connector (OSTI)

Possibility of the employment of a linear coupling equation of mass attenuation coefficients for two energies for the density determination by dual-energy X-ray absorptiometry of multicomponent samples with varia...

N. A. Antropov; D. A. Karpov; Yu. Yu. Kryuchkov

2012-09-01T23:59:59.000Z

300

A new method for nondestructive evaluation of solid wood moisture content based on dual-energy X-ray absorptiometry  

Science Journals Connector (OSTI)

This paper presents a new method to determine the moisture content of solid wood based on the principle of dual-energy X-ray absorptiometry. The study investigates the ... obtained equation is proposed to calcula...

Takashi Tanaka; Yasuo Kawai

2013-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Accuracy and precision of lumbar bone mineral content by dual-energy X-ray absorptiometry in live female monkeys  

Science Journals Connector (OSTI)

Dual-energy X-ray absorptiometry (DXA) was used...in vivo bone mineral content (BMC) of lumbar vertebrae in 20...Macaca fascicularis). The ash weight of the third lumbar vertebra (L3) was compared to the measured...

M. J. Jayo; S. E. Rankin; D. S. Weaver; C. S. Carlson…

1991-01-01T23:59:59.000Z

302

Investigation of a chalcohalide glass optical waveguide structure fabricated by dual-energy carbon-ion implantation  

Science Journals Connector (OSTI)

A planar waveguide structure in a chalcohalide glass was fabricated by dual-energy C ion implantation with energies of 5.5 and 6.0 MeV at fluences of 7.0×1014 and...

Yu, Xiao-Fei; Liu, Tao; Zhang, Lian; Zhou, Yu-Fan; Wang, Tie-Jun; Wang, Xue-Lin

2014-01-01T23:59:59.000Z

303

Low Dose Radiation Research Program: Dual Regulation of JB6 Transformation  

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

Dual Regulation of JB6 Transformation by Low Dose Gamma Radiation. Dual Regulation of JB6 Transformation by Low Dose Gamma Radiation. Authors: Thomas J. Weber,1 Lye M. Markillie,1 William B. Chrisler,1 Xingye C. Lei,1 and Nancy H. Colburn2 Institutions: 1Molecular Biosciences, Pacific Northwest National Laboratory. 2Gene Regulation Section, Basic Research Laboratory, National Cancer Institute JB6 mouse epidermal cells have been instrumental in defining the molecular mechanisms associated with neoplastic transformation in response to known tumor promoters. JB6 cells exhibit a clonal growth response to oxygen free radicals suggesting this model may also be useful for radiation research. Treatment of JB6 cells with 2 and 20 cGy gamma radiation resulted in a weak, but dose-dependent increase in anchorage-independent growth observed

304

Development of Dual-Air-Assistant Atomizing Nozzle to Apply Aerosol-Sealing  

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

Development of Dual-Air-Assistant Atomizing Nozzle to Apply Aerosol-Sealing Development of Dual-Air-Assistant Atomizing Nozzle to Apply Aerosol-Sealing Technology in Air Duct Systems Speaker(s): Alan Ropers Date: July 8, 2002 - 12:00pm Location: Bldg. 90 An Aerosol-sealing Technology was developed by LBNL to seal leaks in Air Duct Systems (ADS). The firm AEROSEAL already commercializes this technology for residential ADS. The current goal of our research at the Laboratory is to apply this technology to large commercial ADS. That means to develop a new kind of injector called "Compact Injector". So far, the injector that is used is a nozzle from the Schlick-Dusen firm. Results in terms of sealing rate are satisfactory, but this nozzle quickly clogs up with sealant particles. There are two reasons for the clogging problem: the

305

Black hole spectra in holography: consequences for equilibration of dual gauge theories  

E-Print Network (OSTI)

Energy gap in the spectrum of equilibrium states of interacting system, along with ability to continuously excite the system inside this gap, leads to violation of the ergodicity hypothesis. We explore this in the framework of gauge theory/string theory correspondence. We study the spectrum of static black holes in Pilch-Warner geometry. These black holes are holographically dual to equilibrium states of strongly coupled $SU(N)$ ${\\cal N}=2^*$ gauge theory plasma on $S^3$ in the planar limit. We find that there is no energy gap in the black hole spectrum. Thus, there is a priory no obstruction for equilibration of arbitrary low-energy states in the theory via a small black hole gravitational collapse. The latter is contrasted with phenomenological examples of holography with dual four-dimensional CFTs having non-equal central charges in the stress-energy tensor trace anomaly.

Buchel, Alex

2015-01-01T23:59:59.000Z

306

Heat transfer effects on the performance of an air-standard irreversible dual cycle  

Science Journals Connector (OSTI)

The objective of this study is to analyse the effects of heat transfer loss and internal irreversibilites, resulting from adiabatic processes, on an irreversible diesel heat engine. Thermodynamic optimisation has been carried out based on the Maximum Power (MP), Maximum Thermal Efficiency (MEF) and Maximum mean Effective Pressure (MEP) criteria for the dual cycle. Power output, thermal efficiency and mean effective pressure are obtained by introducing variable compression ratio, inlet temperature, combustion and heat transfer constants, and compression and expansion efficiencies. Optimal performance and design parameters of the dual cycle are obtained numerically for the MP, MEF and MEP conditions. The optimal compression ratio and pressure ratio at MEP conditions are compared with those results obtained by using the MP and MEF criteria for different constants of heat transfer and combustion in the characteristic grid curves. The results obtained in this paper may provide a guide to the performance and improvement of practical diesel engines.

Yasin Ust; Bahri Sahin; Hasan Kayhan Kayadelen; Guven Gonca

2013-01-01T23:59:59.000Z

307

Dual-Readout Calorimetry for High-Quality Energy Measurements. Final Report  

SciTech Connect

This document constitutes the final report on the project Dual-Readout Calorimetry for High-Quality Energy Measurements. The project was carried out by a consortium of US and Italian physicists, led by Dr. Richard Wigmans (Texas tech University). This consortium built several particle detectors and tested these at the European Center for Nuclear Research (CERN) in Geneva, Switzerland. The idea arose to use scintillating crystals as dual-readout calorimeters. Such crystals were of course already known to provide excellent energy resolution for the detection of particles developing electromagnetic (em) showers. The efforts to separate the signals from scintillating crystals into scintillation and Cerenkov components led to four different methods by which this could be accomplished. These methods are based on a) the directionality, b) spectral differences, c) the time structure, and d) the polarization of the signals.

Wigmans, Richard; Nural, Akchurin

2013-09-01T23:59:59.000Z

308

Comparison between single- and dual-electrode ion source systems for low-energy ion transport  

SciTech Connect

Extraction of ions with energies below 100 eV has been demonstrated using a hot-cathode multi-cusp ion source equipped with extraction electrodes made of thin wires. Two electrode geometries, a single-electrode system, and a dual-electrode system were built and tested. The single-electrode configuration showed high ion beam current densities at shorter distances from the electrode but exhibited rapid attenuation as the distance from the electrode increased. Beam angular spread measurements showed similar beam divergence for both electrode configurations at low plasma densities. At high plasma densities and low extraction potentials, the single-electrode system showed the angular spread twice as large as that of the dual-electrode system. Energy distribution analyses showed a broader energy spread for ion beams extracted from a single-electrode set-up.

Vasquez, M. Jr.; Tokumura, S.; Kasuya, T.; Maeno, S.; Wada, M. [Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-321 and Nissin Ion Equipment Co., Ltd. 575 Kuze Tonoshiro-cho, Minami-ku, Kyoto 601-8205 (Japan); Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-321 (Japan); Novelion Systems Co.Ltd., D-Egg, Kyotanabe, Kyoto 610-332 (Japan); Graduate School of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-321 (Japan)

2012-11-06T23:59:59.000Z

309

Tracking formulas and strategies for a receiver oriented dual-axis tracking toroidal heliostat  

SciTech Connect

A 4 m x 4 m toroidal heliostat with receiver oriented dual-axis tracking, also called spinning-elevation tracking, was developed as an auxiliary heat source for a hydrogen production system. A series of spinning-elevation tracking formulas have been derived for this heliostat. This included basic tracking formulas, a formula for the elevation angle for heliostat with a mirror-pivot offset, and a more general formula for the biased elevation angle. This paper presents the new tracking formulas in detail and analyzes the accuracy of applying a simplifying approximation. The numerical results show these receiver oriented dual-axis tracking formula approximations are accurate to within 2.5 x 10{sup -6} m in image plane. Some practical tracking strategies are discussed briefly. Solar images from the toroidal heliostat at selected times are also presented. (author)

Guo, Minghuan; Wang, Zhifeng; Liang, Wenfeng; Zhang, Xiliang; Zang, Chuncheng [Key Laboratory of Solar Thermal Energy and Photovoltaic System of Chinese Academy of Sciences, Institute of Electrical Engineering, Beijing 100190 (China); Lu, Zhenwu; Wei, Xiudong [Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences (CAS), Jilin 130033 (China)

2010-06-15T23:59:59.000Z

310

DualTrust: A Distributed Trust Model for Swarm-Based Autonomic Computing Systems  

SciTech Connect

For autonomic computing systems that utilize mobile agents and ant colony algorithms for their sensor layer, trust management is important for the acceptance of the mobile agent sensors and to protect the system from malicious behavior by insiders and entities that have penetrated network defenses. This paper examines the trust relationships, evidence, and decisions in a representative system and finds that by monitoring the trustworthiness of the autonomic managers rather than the swarming sensors, the trust management problem becomes much more scalable and still serves to protect the swarm. We then propose the DualTrust conceptual trust model. By addressing the autonomic manager’s bi-directional primary relationships in the ACS architecture, DualTrust is able to monitor the trustworthiness of the autonomic managers, protect the sensor swarm in a scalable manner, and provide global trust awareness for the orchestrating autonomic manager.

Maiden, Wendy M.; Dionysiou, Ioanna; Frincke, Deborah A.; Fink, Glenn A.; Bakken, David E.

2011-02-01T23:59:59.000Z

311

Self-dual soliton solutions in a Chern-Simons-CP(1) model with a nonstandard kinetic term  

E-Print Network (OSTI)

A generalization of the Chern-Simons-CP(1) model is considered by introducing a nonstandard kinetic term. For a particular case, of this nonstandard kinetic term, we show that the model support self-dual Bogomolnyi equations. The BPS energy has a bound proportional to the sum of the magnetic flux and the CP(1) topological charge. The self-dual equations are solved analytically and verified numerically.

Rodolfo Casana; Lucas Sourrouille

2013-11-27T23:59:59.000Z

312

BPS M2-branes in AdS4×Q1,1,1 and their dual loop operators  

Science Journals Connector (OSTI)

In this paper, we first compute the Killing spinors of AdS4×Q1,1,1 and its certain orbifolds. Based on this, two classes of M2-brane solutions are found. The first class of solutions includes M2-branes dual to Wilson loops in the fundamental representation as a special case. The second class includes the candidates of the holographic description of vortex loops in the dual field theories.

Jun-Bao Wu and Meng-Qi Zhu

2014-06-05T23:59:59.000Z

313

Impacts of Optimized Cold & Hot Deck Reset Schedules on Dual Duct VAV Systems - Theory and Model Simulation  

E-Print Network (OSTI)

Impacts of Optimized Cold & Hot Deck Reset Schedules on Dual Duct VAV Systems - Theory and Model Simulation Mingsheng Liu, Ph.D., P.E. Energy Systems Laboratory Texas A&M University College Station, Texas Abstract Optimal hot and cold deck... rate increased from 30% to 70% of the maximum flow. Introduction Simultaneous heating and cooling can be reduced sigmficantly by optimizing cold and hot deck reset schedules in dual duct constant volume systems [Liu et. a1 1994, 1995, 19961...

Liu, M.; Claridge, D. E.

1998-01-01T23:59:59.000Z

314

Continuous Commissioning® of a Single Fan Dual Duct System in an Office Building  

E-Print Network (OSTI)

Continuous Commissioning ® of a Single Fan Dual Duct System in an Office Building D. Dong M. Liu, Ph.D., P.E Jinrong Wang, P.E Energy Systems Laboratory Energy Systems Laboratory... of AHU control sequences can significantly improve building comfort and reduce HVAC energy cost. REFERENCES 1. Liu, M., Y. Zhu, and D. E. Claridge, “Use of EMCS Recorded Data to Identify Potential Savings Due to Improved HVAC Operations...

Dong, D.; Liu, M.

2005-01-01T23:59:59.000Z

315

The dual-mirror Small Size Telescope for the Cherenkov Telescope Array  

E-Print Network (OSTI)

In this paper, the development of the dual mirror Small Size Telescopes (SST) for the Cherenkov Telescope Array (CTA) is reviewed. Up to 70 SST, with a primary mirror diameter of 4 m, will be produced and installed at the CTA southern site. These will allow investigation of the gamma-ray sky at the highest energies accessible to CTA, in the range from about 1 TeV to 300 TeV. The telescope presented in this contribution is characterized by two major innovations: the use of a dual mirror Schwarzschild-Couder configuration and of an innovative camera using as sensors either multi-anode photomultipliers (MAPM) or silicon photomultipliers (SiPM). The reduced plate-scale of the telescope, achieved with the dual-mirror optics, allows the camera to be compact (40 cm in diameter), and low-cost. The camera, which has about 2000 pixels of size 6x6 mm^2, covers a field of view of 10{\\deg}. The dual mirror telescopes and their cameras are being developed by three consortia, ASTRI (Astrofisica con Specchi a Tecnologia Replicante Italiana, Italy/INAF), GATE (Gamma-ray Telescope Elements, France/Paris Observ.) and CHEC (Compact High Energy Camera, universities in UK, US and Japan) which are merging their efforts in order to finalize an end-to-end design that will be constructed for CTA. A number of prototype structures and cameras are being developed in order to investigate various alternative designs. In this contribution, these designs are presented, along with the technological solutions under study.

G. Pareschi; G. Agnetta; L. A. Antonelli; D. Bastieri; G. Bellassai; M. Belluso; C. Bigongiari; S. Billotta; B. Biondo; G. Bonanno; G. Bonnoli; P. Bruno; A. Bulgarelli; R. Canestrari; M. Capalbi; P. Caraveo; A. Carosi; E. Cascone; O. Catalano; M. Cereda; P. Conconi; V. Conforti; G. Cusumano; V. De Caprio; A. De Luca; A. Di Paola; F. Di Pierro; D. Fantinel; M. Fiorini; D. Fugazza; D. Gardiol; M. Ghigo; F. Gianotti; S. Giarrusso; E. Giro; A. Grillo; D. Impiombato; S. Incorvaia; A. La Barbera; N. La Palombara; V. La Parola; G. La Rosa; L. Lessio; G. Leto; S. Lombardi; F. Lucarelli; M. C. Maccarone; G. Malaguti; G. Malaspina; V. Mangano; D. Marano; E. Martinetti; R. Millul; T. Mineo; A. MistÒ; C. Morello; G. Morlino; M. R. Panzera; G. Rodeghiero; P. Romano; F. Russo; B. Sacco; N. Sartore; J. Schwarz; A. Segreto; G. Sironi; G. Sottile; A. Stamerra; E. Strazzeri; L. Stringhetti; G. Tagliaferri; V. Testa; M. C. Timpanaro; G. Toso; G. Tosti; M. Trifoglio; P. Vallania; S. Vercellone; V. Zitelli; For The Astri Collaboration; J. P. Amans; C. Boisson; C. Costille; J. L. Dournaux; D. Dumas; G. Fasola; O. Hervet; J. M. Huet; P. Laporte; C. Rulten; H. Sol; A. Zech; For The Gate Collaboration; R. White; J. Hinton; D. Ross; J. Sykes; S. Ohm; J. Schmoll; P. Chadwick; T. Greenshaw; M. Daniel; G. Cotter; G. S. Varner; S. Funk; J. Vandenbroucke; L. Sapozhnikov; J. Buckley; P. Moore; D. Williams; S. Markoff; J. Vink; D. Berge; N. Hidaka; A. Okumura; H. Tajima; For The Chec Collaboration; For The Cta Consortium

2013-07-18T23:59:59.000Z

316

Experimental Investigation in Optimizing the Hydrogen Fuel on a Hydrogen Diesel Dual-Fuel Engine  

Science Journals Connector (OSTI)

Lee et al.(8) studied the performance of a dual-injection hydrogen-fueled engine by using solenoid in-cylinder injection and an external fuel injection technique. ... Zuohua, H.; Jinhua, W.; Bing, L.; Ke, Z.; Jinrong, Y.; Deming, J. Combustion Characteristics of a Direct-Injection Engine Fueled with Natural Gas-Hydrogen Mixtures Energy Fuels 2006, 20 ( 2) 540– 546 ... Timed manifold injection (TMI) has the potential of being the most appropriate fueling strategy. ...

N. Saravanan; G. Nagarajan

2009-04-10T23:59:59.000Z

317

Gasification Characteristics of Coal/Biomass Blend in a Dual Circulating Fluidized Bed Reactor  

Science Journals Connector (OSTI)

circulating flow/forestry, agricultural waste, industry wastes + coalcoke ... Whereas, a dual fluidized bed gasification technology enables production of the medium calorific value gas (12?18 MJ/Nm3) by separating the combustion and gasification zones in which steam is used as a gasifying agent. ... Since Quercus acutissima is widely used in building, pulp, and shipping industries, its demand and supply in Korea is high. ...

Myung Won Seo; Jeong Hoi Goo; Sang Done Kim; See Hoon Lee; Young Chan Choi

2010-04-23T23:59:59.000Z

318

Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal  

E-Print Network (OSTI)

Variable optical attenuator with a polymer-stabilized dual-frequency liquid crystal Yung-Hsun Wu. For the DFLC-based homogeneous cell, we use a low- frequency 1 kHz electric field to drive the VOA and a high-frequency, Xiao Liang, Yan-Qing Lu, Fang Du, Yi-Hsin Lin, and Shin-Tson Wu A transmission-type variable optical

Wu, Shin-Tson

319

The theorem of Fellman and Jakobsson: A new proof and dual theory  

Science Journals Connector (OSTI)

The Fellman and Jakobsson theorem of 1976 deals with transformations @f of the rank-frequency function g and with their Lorenz curves L(@f^@?g) and L(g). It states (briefly) that L(@f^@?g) is monotonous (in terms of the Lorenz dominance order) with @f(x)x. ... Keywords: Dual, Fellman, Jakobsson, Lorenz curve, Lorenz dominance order, Rank-frequency function, Taxes, Transformation

L. Egghe

2009-12-01T23:59:59.000Z

320

Development of ammonia-sodium bromide heat pump/dual temperature storage concept. Final report  

SciTech Connect

An effective dual temperature heat pump/storage system can be based on the use of ammoniated complex compounds as the storage medium and heat pump working fluid. This report describes the development of an ammoniated complex system, suitable for dual temperature storage, chill storage and heat pumping, as well as the hardware design required for the heat pump/storage operation. Several storage media modifications, heat exchanger designs, and reaction related parameters were investigated in terms of effective heat pumping, dual temperature storage and chill storage characteristics. The modifications were tested in a subscale prototype and compared to the results of the basic experiments performed in Phase I of this project. The computer model developed in Phase I was refined. The sorption reactions and their thermodynamic properties are described as a function of reaction progress allowing coefficient of performance (COP) predictions at varying building loads. A comparison of this system with state-of-the-art thermal storage systems was performed considering the energy density, operating cost, and the environmental impact reflected in building codes.

Rockenfeller, U.

1986-10-01T23:59:59.000Z

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321

EPA's research projects relating to the dual-circuit and Lorenz refrigerator/freezers  

SciTech Connect

The paper discusses EPA research projects relating to the dual-circuit and Lorenz refrigerator/freezers (RFs). EPA is interested in not only phasing out chlorofluorocarbons (CFCs) in RFs, but doing so in a way that will maximize energy efficiency and minimize subsequent impacts on the greenhouse effect. An early decision was made to concentrate on replacing fully halogenated CFCs in RFs during the first year of EPA's research. RFs were chosen because they are small, require small quantities of refrigerants, are relatively easy to modify and test, and are the most energy-consumptive appliances in most U.S. households. In the future, other applications are expected to receive more attention. The first year of EPA's program has concentrated on implementing two alternative configurations of RFs which are believed to have the potential to make RFs more energy efficient: the dual-circuit and the Lorenz RFs. Research has included modeling alternative refrigerants and Non-azeotropic Refrigerant Mixtures (NARMs) in the dual-circuit and Lorenz configurations and experimental testing of modified RFs and refrigeration components in test stands.

Bare, J.C.

1992-01-01T23:59:59.000Z

322

Dual Ginzburg-Landau theory for confinement and chiral symmetry breaking  

Science Journals Connector (OSTI)

We introduce the dual Ginzburg-Landau (DGL) theory as a low energy effective theory of QCD. We study color confinement and dynamical chiral symmetry breaking of nonperturbative QCD by using the DGL theory, where color monopole and its condensation play an essential role on the nonperturbative dynamics in the infrared region. As a result of the dual Meissner effect, the linear static quark potential, which characterizes the quark confinement, is obtained in the long distance. We investigate then the dynamical chiral symmetry breaking by using the Schwinger-Dyson equation, where the gluon propagator includes the nonperturbative effect related to monopole condensation. We find a large enhancement of the chiral-symmetry breaking when the dual Meissner effect takes place. We study the recovery of the chiral symmetry and the deconfinement at finite temperature in the DGL theory. We discuss then the essential assumption of the DGL theory, which is the abelian dominance for the infrared physics, in the maximal abelian (MA) gauge in lattice QCD. The lattice QCD simulation demonstrates that the non-abelian gluons have a finite mass of order of 1 GeV in the MA gauge. We introduce further the instanton configuration as the source of the color monopole. In the MA gauge, a monopole circles around an instanton and with the increase of the instanton density, the monopole loop connects many instantons and a complicated monopole loop covers the whole 4 dimensional space. This study indicates that instantons may be playing an essential role even for color confinement.

H. Toki; H. Suganuma

2000-01-01T23:59:59.000Z

323

Dual MRI T1 and T2(?) contrast with size-controlled iron oxide nanoparticles  

Science Journals Connector (OSTI)

Abstract Contrast-enhancing magnetic resonance mechanism, employing either positive or negative signal changes, has contrast-specific signal characteristics. Although highly sensitive, negative contrast typically decreases the resolution and spatial specificity of MRI, whereas positive contrast lacks a high contrast-to-noise ratio but offers high spatial accuracy. To overcome these individual limitations, dual-contrast acquisitions were performed using iron oxide nanoparticles and a pair of MRI acquisitions. Specifically, vascular signals in MR angiography were positively enhanced using ultrashort echo (UTE) acquisition, which provided highly resolved vessel structures with increased vessel/tissue contrast. In addition, fast low angle shot (FLASH) acquisition yielded strong negative vessel contrast, resulting in the higher number of discernible vessel branches than those obtained from the UTE method. Taken together, the high sensitivity of the negative contrast delineated ambiguous vessel regions, whereas the positive contrast effectively eliminated the false negative contrast areas (e.g., airways and bones), demonstrating the benefits of the dual-contrast method. From the Clinical Editor In this study, the MRI properties of iron oxide nanoparticles were studied in an animal model. These contrast agents are typically considered negative contrast materials, leading to signal loss on T2* weighted images, but they also have known T1 effects as well, which is lower than that of standard positive contrast agents (like gadolinium or manganese) but is still detectable. This dual property was utilized in this study, demonstrating high sensitivity of the negative contrast in delineating ambiguous vessel regions, whereas the positive contrast eliminated false negative contrast areas (areas giving rise to susceptibility effects).

Hoesu Jung; Bumwoo Park; Changkyung Lee; Junghun Cho; Jiyeon Suh; JangYeon Park; YoungRo Kim; Jeongkon Kim; Gyunggoo Cho; HyungJoon Cho

2014-01-01T23:59:59.000Z

324

Experimental analysis of a diesel engine operating in Diesel–Ethanol Dual-Fuel mode  

Science Journals Connector (OSTI)

Abstract The use of engines is necessary to keep the world moving. Such engines are fed mainly by fossil fuels, among these, the diesel. The operation and the behavior of engines in different thermodynamic cycles, with common fossil fuels, it is still challenging but, in general, it has well known and documented data. On the other hand, for alternative fuels, there is still demand of experimental data, particularly considering that it is desirable, most of the times, the use of a system with dual mode (reversible). Such systems are called Dual-Fuel, it brings a greater degree of freedom, but imply in technological challenges. In this paper we used an engine operating with single cylinder direct injection diesel and port ethanol injection system in Dual-Fuel mode with a 100% electronically controlled calibration. The methodology applied was, once the engine calibration was given to achieve the best specific fuel consumption or the MBT (Maximum Brake Torque) in each load condition, to gradually substitute the diesel oil by ethanol in compliance with the requirements established. Comparisons were made among working conditions considering the rate of diesel substitution and the energy indicated efficiency. Initially, the flow structure in the combustion chamber was tested in both ‘quiescent’ and high “swirl” modes. Compression ratios were adjusted at 3 different levels: 14:1, 16:1 and 17:1. It was tested two injectors, the first one of 35 g/s and another of 45 g/s. Regarding pressure diesel injection, 4 levels were investigated namely 800, 1000, 1200 and 1400 bar.

Roberto Freitas Britto Jr.; Cristiane Aparecida Martins

2014-01-01T23:59:59.000Z

325

Dual-channel filter photometer system for biocomponent content determination in diesel oil  

Science Journals Connector (OSTI)

Currently, infrared spectrometry is the most often used method of determination of the biocomponent content in diesel oil, but this is also an expensive and time-consuming process. In this study, a portable, low-cost dual-channel filter photometer system is presented which meets the requirements of the European standard for biocomponent concentration measurements in diesel fuel. The results obtained using this novel system are reported and compared to the measurements made using a standard infrared spectrometer for biodiesel concentration between 0% and 20% by weight. The advantages of the new system, such as its adaptability to the different environmental conditions of analysis, are also discussed.

Jacek Go??biowski; Tomasz Prohu?

2008-01-01T23:59:59.000Z

326

Synergistic enhancement of iron oxide nanoparticle and gadolinium for dual-contrast MRI  

SciTech Connect

Highlights: Black-Right-Pointing-Pointer MR contrast agents exert influence on T{sub 1} or T{sub 2} relaxation time of the surrounding tissue. Black-Right-Pointing-Pointer Combined use of iron oxide and Gd-DTPA can improve the sensitivity/specificity of lesion detection. Black-Right-Pointing-Pointer Dual contrast MRI enhances the delineation of tumor borders and small lesions. Black-Right-Pointing-Pointer The effect of DC-MRI can come from the high paramagnetic susceptibility of Gd{sup 3+}. Black-Right-Pointing-Pointer The effect of DC-MRI can also come from the distinct pharmacokinetic distribution of SPIO and Gd-DTPA. -- Abstract: Purpose: The use of MR contrast agents allows accurate diagnosis by exerting an influence on the longitudinal (T{sub 1}) or transverse (T{sub 2}) relaxation time of the surrounding tissue. In this study, we combined the use of iron oxide (IO) particles and nonspecific extracellular gadolinium chelate (Gd) in order to further improve the sensitivity and specificity of lesion detection. Procedures: With a 7-Tesla scanner, pre-contrasted, IO-enhanced and dual contrast agent enhanced MRIs were performed in phantom, normal animals, and animal models of lymph node tumor metastases and orthotopic brain tumor. For the dual-contrast (DC) MRI, we focused on the evaluation of T{sub 2} weighted DC MRI with IO administered first, then followed by the injection of a bolus of gadolinium diethylenetriamine pentaacetic acid (Gd-DTPA). Results: Based on the C/N ratios and MRI relaxometry, the synergistic effect of coordinated administration of Gd-DTPA and IO was observed and confirmed in phantom, normal liver and tumor models. At 30 min after administration of Feridex, Gd-DTPA further decreased T{sub 2} relaxation in liver immediately after the injection. Additional administration of Gd-DTPA also immediately increased the signal contrast between tumor and brain parenchyma and maximized the C/N ratio to -4.12 {+-} 0.71. Dual contrast MRI also enhanced the delineation of tumor borders and small lesions. Conclusions: DC-MRI will be helpful to improve diagnostic accuracy and decrease the threshold size for lesion detection.

Zhang, Fan [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States) [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States); Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361005 (China); Huang, Xinglu [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States)] [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States); Qian, Chunqi [Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke (NINDS), National Institutes of Health (NIH), Bethesda, MD 20892 (United States) [Laboratory of Functional and Molecular Imaging, National Institute of Neurological Disorders and Stroke (NINDS), National Institutes of Health (NIH), Bethesda, MD 20892 (United States); Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361005 (China); Zhu, Lei [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States) [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States); Center for Molecular Imaging and Translational Medicine, School of Public Health, Xiamen University, Xiamen 361005 (China); Hida, Naoki [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States)] [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States); Niu, Gang, E-mail: niug@mail.nih.gov [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States)] [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States); Chen, Xiaoyuan, E-mail: shawn.chen@nih.gov [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States)] [Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health - NIH, Bethesda, MD 20892 (United States)

2012-09-07T23:59:59.000Z

327

Knock limitations of methane-air mixtures in a turbocharged dual-fuel engine  

SciTech Connect

Knock limitations are investigated using natural gas, with diesel pilot ignition, as a fuel for the 3406 DI-TA Caterpillar diesel engine. Thermodynamic properties at TDC are generated by computer and compared with experimental results. Exhaust emissions are analyzed. A comparison is made of dual-fuel operation relative to diesel. Observations are made to determine the onset of knock. The onset of knock is characterized as a function of engine speed, load, inlet manifold temperature, and air-fuel ratio (A/F). The conditions at the inset of knock are determined using cylinder pressure data. The most efficient operating range is determined with knock avoidance as a prime parameter.

Song, Y.K.; Acker, G.H.; Schaetzle, W.J.; Brett, C.E.

1987-01-01T23:59:59.000Z

328

A test for market power exertion in the credit card industry with the dual solow residual  

E-Print Network (OSTI)

the causes, given the effect (X), equal non-zero. Y ~X ~Z Figure 3. 2: Causal inverted fork The common effects do not screen off associations between the joint causes. Directed acyclic graphs illustrate conditional independence as in n Pr(xi, xn xn... successfully. 20 Roeger's derivation, the dual residual under imperfect competition is developed from a unit cost function that presumes constant returns to scale. Equation (9) illustrates the functional form. (9) G(Wtt. Wrt)Yt C(Wtt, Wrt, Y?Et) = where...

Meurisse, Mark P

2012-06-07T23:59:59.000Z

329

On the relative dual of an $S^1$-gerbe over an orbifold.  

E-Print Network (OSTI)

We construct a new effective orbifold $\\widehat{\\Y}$ with an $S^1$-gerbe $c$ to study an $S^1$-gerbe $\\mathfrak{t}$ on a $G$-gerbe $\\Y$ over an orbifold $\\B$. We view the former as the relative dual, relative to $\\B$, of the latter. We show that the two pairs $(\\Y, \\mathfrak{t})$ and $(\\widehat{\\Y}, c)$ have isomorphic categories of sheaves, and also the associated twisted groupoid algebras are Morita equivalent. As a corollary, the K-theory and cohomology groups of $(\\Y, \\mathfrak{t})$ and $(\\widehat{\\Y}, c)$ are isomorphic.

Ilya Shapiro; Xiang Tang; Hsian-Hua Tseng.; 1-20

330

Process for whole cell saccharification of lignocelluloses to sugars using a dual bioreactor system  

DOE Patents (OSTI)

The present invention describes a process for saccharification of lignocelluloses to sugars using whole microbial cells, which are enriched from cultures inoculated with paper mill waste water, wood processing waste and soil. A three-member bacterial consortium is selected as a potent microbial inocula and immobilized on inedible plant fibers for biomass saccharification. The present invention further relates the design of a dual bioreactor system, with various biocarriers for enzyme immobilization and repeated use. Sugars are continuously removed eliminating end-product inhibition and consumption by cell.

Lu, Jue (Okemos, MI); Okeke, Benedict (Montgomery, AL)

2012-03-27T23:59:59.000Z

331

Co-Gasification of Wood and Lignite in a Dual Fluidized Bed Gasifier  

Science Journals Connector (OSTI)

Mixts. of coal and biomass were co-gasified in a jetting, ash-agglomerating, fluidized-bed, pilot scale-sized gasifier to provide steady-state operating data for numerical simulation verification. ... Downstream cleaning of gas by catalytic cracking and/or scrubbing is complex and/or expensive for small to medium gasification plants, so conversion of tar within the gasifier is preferred. ... Kern, S.; Pfeifer, C.; Hofbauer, H. Gasification of lignite in a dual fluidized bed gasifier - Influence of bed material particle size and the amount of steam. ...

Stefan Kern; Christoph Pfeifer; Hermann Hofbauer

2013-01-15T23:59:59.000Z

332

Production of Middle Caloric Fuel Gas from Coal by Dual-Bed Gasification Technology  

Science Journals Connector (OSTI)

This work demonstrated the dual-bed gasification technology on a pilot plant (1000 tons of coal/a) mainly consisting of a fluidized-bed gasifier and a pneumatic combustor using the coal with a particle size of less than 20 mm. ... It can be seen in Table 1 that the mass fraction of the coal with sizes less than 2.0 mm was about 45 wt %. ... Coal was continuously fed in the gasifier, and meanwhile, air or gas mixture (air and steam) as the fluidizing medium and gasifying reagent was introduced from the bottom of the gasifier. ...

Yin Wang; Wen Dong; Li Dong; Junrong Yue; Shiqiu Gao; Toshiyuki Suda; Guangwen Xu

2010-04-23T23:59:59.000Z

333

Dual initiation strip charge apparatus and methods for making and implementing the same  

DOE Patents (OSTI)

A Dual Initiation Strip Charge (DISC) apparatus is initiated by a single initiation source and detonates a strip of explosive charge at two separate contacts. The reflection of explosively induced stresses meet and create a fracture and breach a target along a generally single fracture contour and produce generally fragment-free scattering and no spallation. Methods for making and implementing a DISC apparatus provide numerous advantages over previous methods of creating explosive charges by utilizing steps for rapid prototyping; by implementing efficient steps and designs for metering consistent, repeatable, and controlled amount of high explosive; and by utilizing readily available materials.

Jakaboski, Juan-Carlos (Albuquerque, NM); Todd,; Steven N. (Rio Rancho, NM); Polisar, Stephen (Albuquerque, NM); Hughs, Chance (Tijeras, NM)

2011-03-22T23:59:59.000Z

334

Behavior of Inorganic Matter in a Dual Fluidized Steam Gasification Plant  

Science Journals Connector (OSTI)

The principle of DFB steam gasification is based on the separation of the endothermic gasification process and the external heat supply from a separate combustion chamber. ... The precoat material described in Table 8 shows a typical composition of the natural mineral dolomite, whose main components are calcium and magnesium oxide, with a high ignition loss at 1050 °C, when the carbonates are released. ... On the basis of a dual fluidized bed system, steam gasification of biomass is coupled with in situ CO2 absorption to enhance the formation of hydrogen. ...

Friedrich Kirnbauer; Markus Koch; Reinhard Koch; Christian Aichernig; Hermann Hofbauer

2013-05-29T23:59:59.000Z

335

An advanced economizer controller for dual-duct air-handling systems -- with a case application  

SciTech Connect

A heating penalty is expected when economizers are applied to dual-duct air-handling systems. The heating penalty can be even higher than the cooling savings when the hot airflow is higher than the cold airflow. To avoid the excessive heating penalty, advanced economizers are developed in this paper. The application of the advanced economizer has resulted in savings of $7,000/yr in one 95,000-ft{sup 2} (8,800-m{sup 2}) school building since 1993. The impacts of cold and hot deck settings on the energy consumption are also discussed.

Liu, M.; Claridge, D.E. [Texas A and M Univ., College Station, TX (United States). Mechanical Engineering Dept.; Park, B.Y. [Engineering Education Inst., Inchon (Korea, Republic of). Dept. of Architectural Engineering

1997-12-31T23:59:59.000Z

336

The ASTRI Project: a mini-array of dual-mirror small Cherenkov telescopes for CTA  

E-Print Network (OSTI)

ASTRI is a flagship project of the Italian Ministry of Education, University and Research, which aims to develop an end-to-end prototype of the CTA small-size telescope. The proposed design is characterized by a dual-mirror Schwarzschild-Couder configuration and a camera based on Silicon photo-multipliers, two challenging but innovative technological solutions which will be adopted for the first time on a Cherenkov telescope. Here we describe the current status of the project, the expected performance and the possibility to realize a mini-array composed by a few small-size telescopes, which shall be placed at the final CTA Southern Site.

La Palombara, N; Antonelli, L A; Bastieri, D; Bellassai, G; Belluso, M; Bigongiari, C; Billotta, S; Biondo, B; Bonanno, G; Bonnoli, G; Bruno, P; Bulgarelli, A; Canestrari, R; Capalbi, M; Caraveo, P; Carosi, A; Cascone, E; Catalano, O; Cereda, M; Conconi, P; Conforti, V; Cusumano, G; De Caprio, V; De Luca, A; Di Paola, A; Di Pierro, F; Fantinel, D; Fiorini, M; Fugazza, D; Gardiol, D; Ghigo, M; Gianotti, F; Giarrusso, S; Giro, E; Grillo, A; Impiombato, D; Incorvaia, S; La Barbera, A; La Parola, V; La Rosa, G; Lessio, L; Leto, G; Lombardi, S; Lucarelli, F; Maccarone, M C; Malaguti, G; Malaspina, G; Mangano, V; Marano, D; Martinetti, E; Millul, R; Mineo, T; Mistó, A; Morello, C; Morlino, G; Panzera, M R; Pareschi, G; Rodeghiero, G; Romano, P; Russo, F; Sacco, B; Sartore, N; Schwarz, J; Segreto, A; Sironi, G; Sottile, G; Stamerra, A; Strazzeri, E; Stringhetti, L; Tagliaferri, G; Testa, V; Timpanaro, M C; Toso, G; Tosti, G; Trifoglio, M; Vallania, P; Vercellone, S; Zitelli, V

2013-01-01T23:59:59.000Z

337

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

338

Low power RF CMOS phase-shifting dual modulus (16/17) prescaler  

E-Print Network (OSTI)

speed dual modulus prescalers consume a considerable portion of the power budget of the transceiver. The Conventional Synchronous Prescaler %3/4 MF G2 Vo D Q FF1 Q' D Q FF2 D Q FF3 Q' D Q FF4 Q' CII& CII& CII& CII& Vin MC Figure 4... ratio of 16. When MC is low, the synchronous circuit divides by 3 or 4 depending on whether MF is low or high respectively. The feedback from the ripple counter is set up such that MF is low only when FF3 and FF4 are in the state 11. For the other 3...

Duggal, Abhishek

2000-01-01T23:59:59.000Z

339

Dual structure of saturated absorption resonance at an open atomic transition  

SciTech Connect

Experiments on open transitions of the D{sub 1} line of alkali metals (Cs and Rb isotopes) reveal the dual structure of saturated absorption resonance in the signal of a high-intensity optical wave in the presence of a low-intensity counterpropagating wave. Theoretical analysis shows that the observed shape of the resonance is associated with the openness of the atomic transition as well as with the Doppler effect for atoms in a gas. The results are of general physical significance for nonlinear spectroscopy and can also find application in metrology (frequency and time standards on open transitions).

Vasil'ev, V. V., E-mail: vlvlab@okb.lpi.troitsk.ru; Velichanskii, V. L., E-mail: vlvlab@okb.lpi.troitsk.ru; Zibrov, S. A., E-mail: vlvlab@okb.lpi.troitsk.ru [Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation); Sivak, A. V., E-mail: vlvlab@okb.lpi.troitsk.ru [National Research Nuclear University (Moscow Institute of Engineering Physics) (Russian Federation); Brazhnikov, D. V., E-mail: LLF@laser.nsc.ru; Taichenachev, A. V., E-mail: LLF@laser.nsc.ru; Yudin, V. I., E-mail: LLF@laser.nsc.ru [Russian Academy of Sciences, Institute of Laser Physics, Siberian Branch (Russian Federation)

2011-05-15T23:59:59.000Z

340

Twelve or 30 Months of Dual Antiplatelet Therapy after Drug-Eluting Stents  

Science Journals Connector (OSTI)

...noncardiovascular causes of death. Statistical Analysis. The primary efficacy analysis was a superiority analysis performed with the use of the log-rank test, with stratification according to geographic region (North America, Europe, or Australia and New Zealand), thienopyridine drug received at the time... Patients who had received a drug-eluting stent and then dual antiplatelet therapy for 12 months were randomly assigned to 18 more months of therapy or aspirin alone. Continued therapy resulted in lower rates of stent thrombosis and major adverse cardiovascular events but more bleeding.

Mauri L.; Kereiakes D.J.; Yeh R.W.

2014-12-04T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Generalized cell–dual-cell transformation and exact thresholds for percolation  

Science Journals Connector (OSTI)

Suggested by Scullard’s recent star-triangle relation for correlated bond systems, we propose a general “cell–dual-cell” transformation, which allows in principle an infinite variety of lattices with exact percolation thresholds to be generated. We directly verify Scullard’s site percolation thresholds, and derive the bond thresholds for his “martini” lattice (pc=1?2) and the “A” lattice (pc=0.625457…, solution to p5?4p4+3p3+2p2?1=0). We also present a precise Monte Carlo test of the site threshold for the “A” lattice.

Robert M. Ziff

2006-01-27T23:59:59.000Z

342

Dual-mode self-validating resistance/Johnson noise thermometer system  

DOE Patents (OSTI)

A dual-mode Johnson noise and DC resistance thermometer capable of use in control systems where prompt indications of temperature changes and long term accuracy are needed. A resistance-inductance-capacitance (RLC) tuned circuit produces a continuous voltage signal for Johnson noise temperature measurement. The RLC circuit provides a mean-squared noise voltage that depends only on the capacitance used and the temperature of the sensor. The sensor has four leads for simultaneous coupling to a noise signal processor and to a DC resistance signal processor.

Shepard, Robert L. (Oak Ridge, TN); Blalock, Theron V. (Knoxville, TN); Roberts, Michael J. (Knoxville, TN)

1993-01-01T23:59:59.000Z

343

Measurable energy savings of installing variable frequency drives for cooling towers’ fans, compared to dual speed motors  

Science Journals Connector (OSTI)

Abstract In recent years the building management system (BMS) controllers have been used to control the operation of heating, ventilation, and air conditioning system in addition to lighting and some electrical equipment in order to save energy. In the water cooled system, the BMS controls the operation process of the cooling towers (CTs) fans of dual speed motors to maintain a constant leaving water temperature for different cooling loads and different ambient wet bulb temperature (WBT). This paper presents the effect of installing variable frequency drives (VFDs) for \\{CTs\\} fans in Kuwait during summer season on energy savings compared to dual speed control. The results have shown that with VFD mode, the reduction in water consumption was over 13% compared to the commonly used dual speed mode. More importantly, the combined power for the chillers and the \\{CTs\\} fans for the same amount of cooling produced were reduced by 5.8% in the VFD mode.

E. Al-Bassam; R. Alasseri

2013-01-01T23:59:59.000Z

344

D3-D7 holographic dual of a perturbed 3D CFT  

Science Journals Connector (OSTI)

An appropriately oriented D3-D7-brane system is the holographic dual of relativistic fermions occupying a 2+1-dimensional defect embedded in a 3+1-dimensional spacetime. The fermions interact via fields of N=4 Yang-Mills theory in the 3+1-dimensional bulk. Recently, using internal flux to stabilize the system in the probe N7?N3 limit, a number of solutions which are dual to conformal field theories with fermion content have been found. We use holographic techniques to study perturbations of a particular one of the conformal field theories by relevant operators. Generally, the response of a conformal field theory to such a perturbation grows and becomes nonperturbative at low energy scales. We shall find that a perturbation which switches on a background magnetic field B and fermion mass m induces a renormalization group flow that can be studied perturbatively in the limit of small m2/B. We solve the leading order explicitly. We find that, for one particular value of internal flux, the system exhibits magnetic catalysis, the spontaneous breaking of chiral symmetry enhanced by the presence of the magnetic field. In the process, we derive formulas predicting the Debye screening length of the fermion-antifermion plasma at finite density and the diamagnetic moment of the ground state of the fermion system in the presence of a magnetic field.

Hamid Omid and Gordon W. Semenoff

2013-07-10T23:59:59.000Z

345

A dual pore carbon aerogel based air cathode for a highly rechargeable lithium-air battery  

Science Journals Connector (OSTI)

Abstract Cathode structure plays a vital role in lithium-air battery for that it can provide space for discharged products accommodation and free path for oxygen, e? and Li+ transport. However, pore blockage, cathode passivation and degradation all result in low discharge rates and poor cycling capability. To get rid of these predicaments, a novel highly conductive dual pore carbon aerogel based air cathode is fabricated to construct a lithium-air battery, which exhibits 18 to 525 cycles in the LiTFSI/sulfolane electrolyte at a current density varying from 1.00 mA cm?2 to 0.05 mA cm?2, accompanied by a high energy efficiency of 78.32%. We postulate that the essence lies in that the as-prepared air cathode inventively create a suitable tri-phase boundary reaction zone, facilitating oxygen and Li+ diffusion in two independant pore channels, thus realizing a relative higher discharge rate capability, lower pore blockage and cathode passivation. Further, pore structure, carbon loading, rate capability, discharge depth and the air's effect are exploited and coordinated, targeting for a high power and reversible lithium-air battery. Such nano-porous carbon aerogel air cathode of novel dual pore structure and material design is expected to be an attractive alternative for lithium-air batteries and other lithium based batteries.

Fang Wang; Yang-Hai Xu; Zhong-Kuan Luo; Yan Pang; Qi-Xing Wu; Chun-Sheng Liang; Jing Chen; Dong Liu; Xiang-hua Zhang

2014-01-01T23:59:59.000Z

346

EPA's research projects relating to the dual-circuit and Lorenz refrigerator/freezers  

SciTech Connect

At a meeting in February 1989, EPA presented to several research universities, national laboratories, and refrigerator/freezer (RF) manufacturers the Agency's desire to replace CFC-12 as a refrigerant in the RF vapor compression cycle and increase RF energy efficiency. EPA recognized that, while eliminating CFCs, energy benefits could be gained by further product development (e.g., improving compressor efficiency or heat transfer surface areas). The largest cycle energy gains, however, were expected to be a result of completely different vapor compression configuration. Two new vapor compression configurations were suggested by the participants - the Lorenz design and the dual-circuit design. A decision was made to construct and test modified RFs as proof that the advanced refrigerants and cycles could achieve energy gains. An RF computer model has been updated and expanded which can model both the Lorenz and dual-circuit RF. Modified RF testing and component testing in test stands is being performed to determine the increased energy performance of these configurations.

Bare, J.C. (Environmental Protection Agency, Research Triangle Park, NC (United States))

1992-01-01T23:59:59.000Z

347

Dual beta-lactam therapy for serious Gram-negative infections: is it time to revisit?  

Science Journals Connector (OSTI)

Abstract We are rapidly approaching a crisis in antibiotic resistance, particularly among Gram-negative pathogens. This, coupled with the slow development of novel antimicrobial agents, underscores the exigency of redeploying existing antimicrobial agents in innovative ways. One therapeutic approach that was heavily studied in the 1980s but abandoned over time is dual beta-lactam therapy. This article reviews the evidence for combination beta-lactam therapy. Overall, in vitro, animal and clinical data are positive and suggest that beta-lactam combinations produce a synergistic effect against Gram-negative pathogens that rivals that of beta-lactam–aminoglycoside or beta-lactam–fluoroquinolone combination therapy. Although the precise mechanism of improved activity is not completely understood, it is likely attributable to an enhanced affinity to the diverse penicillin-binding proteins found among Gram negatives. The collective data indicate that dual beta-lactam therapy should be revisited for serious Gram-negative infections, especially in light of the near availability of potent beta-lactamase inhibitors, which neutralize the effect of problematic beta-lactamases.

Christine Rahme; Jill M. Butterfield; Anthony M. Nicasio; Thomas P. Lodise

2014-01-01T23:59:59.000Z

348

Thermodynamics of dual conformal field theories for Kerr-AdS black holes  

SciTech Connect

Recently Gibbons et al. in [G. W. Gibbons et al. Class. Quant. Grav. 22, 1503 (2005)] defined a set of conserved quantities for Kerr-AdS black holes with the maximal number of rotation parameters in arbitrary dimension. This set of conserved quantities is defined with respect to a frame which is nonrotating at infinity. On the other hand, there is another set of conserved quantities for Kerr-AdS black holes, defined by Hawking et al. in [Hawking et al. Phys. Rev. D 59, 064005 (1999)], which is measured relative to a frame rotating at infinity. Gibbons et al. explicitly showed that the quantities defined by them satisfy the first law of black hole thermodynamics, while those quantities defined by Hawking et al. do not obey the first law. In this paper we discuss thermodynamics of dual CFTs to the Kerr-AdS black holes by mapping the bulk thermodynamic quantities to the boundary of the AdS space. We find that thermodynamic quantities of dual CFTs satisfy the first law of thermodynamics and Cardy-Verlinde formula only when these thermodynamic quantities result from the set of bulk quantities given by Hawking et al.. We discuss the implication of our results.

Cai Ronggen; Cao Liming; Pang Dawei [Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080 (China); Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080 (China); Graduate School of the Chinese Academy of Sciences, Beijing 100039 (China)

2005-08-15T23:59:59.000Z

349

Bag model of hadrons, dual QCD thermodynamics and Quark-Gluon Plasma  

E-Print Network (OSTI)

Using the grand canonical ensemble formulation of a multi-particle statistical system, the thermodynamical description of the dual QCD has been presented in terms of the bag model of hadrons and analyzed for the quark-gluon plasma phase of hadronic matter. The dual QCD bag construction has been shown to lead to the radial pressure on the bag surface in terms of the vector glueball masses of the magnetically condensed QCD vacuum. Constructing the grand canonical partition function to deal with the quark-gluon plasma phase of the non-strange hadrons, the energy density and the plasma pressure have been derived and used to understand the dynamics of the associated phase transition. The critical temperature for QGP-hadron phase transition has been derived and numerically estimated by using various thermodynamic considerations. A comparison of the values of the critical temperatures for QGP-hadron phase transition with those obtained for the deconfinement-phase transition, has been shown to lead to the relaxation ...

Chandola, H C; Dehnen, H

2015-01-01T23:59:59.000Z

350

Reduce Overhead, Implement Energy Efficiency in Water/Wastewater  

E-Print Network (OSTI)

. Utilize Biogas Generated On-Site - If a facility has the capability to produce biogas of sufficient quantity (approximately 15 cfm of biogas is necessary to operate a 30 kW microturbine), it may be beneficial to utilize this byproduct. Note... Orleans, LA, May 8-11, 2007. the mixing system with one blower, subsequently saving energy. The savings resulting from this improvement is nearly 400,000 kWh. Food Processor ? modification to its phosphorus removal strategy to increase biogas...

Cantwell, J. C.

2007-01-01T23:59:59.000Z

351

Overhead Analysis of Query Localization Optimization and Wenzheng Xu  

E-Print Network (OSTI)

to localize the query flooding to a limited region of the networks. The simulation results in [3] demonstrated of global flooding and provide an optimization solution to it. We finally perform experimental simulations routing histories to localize the query flood to a limited region of a network. However, the lifetime

Liang, Weifa

352

Economics of design and operation of overhead electric distribution systems  

E-Print Network (OSTI)

failures where bare conductors have been used, than on lines under the same operating conditions built of weather-proof conductor. k9 The area of the conductor exoosed to viind and ice, loading nas been re- duced by, omitting the insulation without... ? dead end, galvanized, zith cotter key. This clevis must, fit both $506 and O. B. X. H. strain insulators under 10, 000 pound tension. 19. Connectors ? 3 ? bolt, solderless, bronze clamp. 20. Connectors ? aluminum, 2" clamp. 21. Ground rods...

Cox, Carl Clarence

2012-06-07T23:59:59.000Z

353

Nonlinear Free Vibrations of Coupled Spans of Overhead Transmission Lines  

E-Print Network (OSTI)

. In wintertime when the cable is covered by snow or ice, the cables are vulnerable to large scale vertical enough for the air-insulation to break down, causing a short-circuit and structural damage to the cables

Rienstra, Sjoerd W.

354

Configurability of performance and overheads in flash management  

Science Journals Connector (OSTI)

Flash memory has been widely considered as a good alternative for storage system implementations because it offers superior vibration tolerance and power efficiency, compared to hard-disks. Because of its unique characteristics, direct applications of ...

Tei-Wei Kuo; Jen-Wei Hsieh; Li-Pin Chang; Yuan-Hao Chang

2006-01-01T23:59:59.000Z

355

Catalytic isomerization of the overhead fractions of straight run gasoline  

Science Journals Connector (OSTI)

The isomerization of the pentane and hexane fractions of gasoline on a platinum catalyst was studied, as...

N. R. Bursian; G. N. Maslyanskii…

1965-06-01T23:59:59.000Z

356

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel Inverted Pendulum  

E-Print Network (OSTI)

A Dual Model-Free Control of Underactuated Mechanical Systems, Application to The Inertia Wheel underac- tuated mechanical system: the inertia wheel inverted pendulum. Numerical simulations as well: the ball and beam [9] (where the dynamics of the beam has not been taken into account) and the Planar

Paris-Sud XI, Université de

357

A Dual Platform for Selective Analyte Enrichment and Ionization in Mass Spectrometry Using Aptamer-Conjugated Graphene Oxide  

E-Print Network (OSTI)

A Dual Platform for Selective Analyte Enrichment and Ionization in Mass Spectrometry Using Aptamer/Biosensing and Chemometrics, College of Biology, College of Chemistry and Chemical Engineering, Hunan UniVersity, Changsha and detection platform for analytes from complex biological media. We have shown that cocaine and adenosine can

Tan, Weihong

358

Procedure and Application for Determining the Cold Deck and Hot Deck Airflow in a Dual-Duct System  

E-Print Network (OSTI)

This paper introduces an innovative method to determine the cold and hot airflow through a dual-duct variable air volume (VAV) system. The actual building load can be identified based on the calculated airflow and temperature for both the cold...

Liu, G.; Mingsheng, L.

2006-01-01T23:59:59.000Z

359

Snow growth and transport patterns in orographic storms as estimated from airborne vertical-plane dual-Doppler radar data  

Science Journals Connector (OSTI)

Airborne vertical-plane dual-Doppler cloud radar data, collected on wind-parallel flight legs over a mountain in Wyoming in 16 winter storms, are used to analyze the growth, transport, and sedimentation of snow. In all storms the wind is rather ...

Bart Geerts; Yang Yang; Roy Rasmussen; Samuel Haimov; Binod Pokharel

360

Millimeter-Wave Concurrent Dual-Band BiCMOS RFIC Transmitter for Radar and Communication Systems  

E-Print Network (OSTI)

) ............................................................................................ 128 5.6 Current waveform in the analysis of class A, B, and C PAs ...................... 130 5.7 Maximum efficiency versus conduction angle ........................................... 132 5.8 Main blocks of a concurrent dual-band PA... tuning range (b) ........ 182 6.6 Simulated tunable impulses ........................................................................ 183 xv 6.7 Measured impulse duration versus control voltage .................................... 184 6...

Huynh, Cuong Phu Minh 1976-

2012-11-21T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Exact Solutions of Nonlinear Schrodinger's Equation with Dual Power-Law Nonlinearity by Extended Trial Equation Method  

E-Print Network (OSTI)

In this paper, we acquire the soliton solutions of the nonlinear Schrodinger's equation with dual power-law nonlinearity. Primiraly, we use the extended trial equation method to find exact solutions of this equation. Then, we attain some exact solutions including soliton solutions, rational and elliptic function solutions of this equation by using the extended trial equation method.

Hasan Bulut; Yusuf Pandir; Seyma Tuluce Demiray

2014-02-04T23:59:59.000Z

362

Fault detection and isolation of a dual spool gas turbine engine using dynamic neural networks and multiple model approach  

Science Journals Connector (OSTI)

In this paper, a fault detection and isolation (FDI) scheme for an aircraft jet engine is developed. The proposed FDI system is based on the multiple model approach and utilizes dynamic neural networks (DNNs) to accomplish this goal. Towards this end, ... Keywords: Bank of detection and isolation filters, Dual spool gas turbine engine, Dynamic neural networks, Fault diagnosis, Multiple model scheme

Z. N. Sadough Vanini; K. Khorasani; N. Meskin

2014-02-01T23:59:59.000Z

363

Model-based image reconstruction for dual-energy X-ray CT with fast KVP switching  

Science Journals Connector (OSTI)

The most recent generation of X-ray CT systems can collect dual energy (DE) sinograms by rapidly switching the X-ray tube voltage between two levels for alternate projection views. This reduces motion artifacts in DE imaging, but yields sinograms that ... Keywords: dualenergy X-ray computed tomography, model-based image reconstruction, penalized likelihood

Wonseok Huh; Jeffrey A. Fessler

2009-06-01T23:59:59.000Z

364

Visible light stimulating dual-wavelength emission and O vacancy involved energy transfer behavior in luminescence for coaxial nanocable arrays  

SciTech Connect

We report a strategy to investigate O vacancy (V{sub O}) involved energy transfer and dual-wavelength yellow emission in coaxial nanocable. By electric field deposition and subsequent sol-gel template approach, ZnO:Tb/Y{sub 2}O{sub 3}:Eu coaxial nanocable arrays are synthesized. After visible light excitation, system is promoted to O vacancy charge transfer state of V{sub O}(0/+). In the following cross relaxation, energy transfer from V{sub O} to the excitation energy level of Tb{sup 3+} in ZnO:Tb core area. While in Y{sub 2}O{sub 3}:Eu shell area, energy transfer to the excitation energy level of Eu{sup 3+}. Subsequently, dual-wavelength emission is observed. By constructing nanocable with dual-wavelength emission, yellow luminescence is obtained. Adjust doping concentration of Eu{sup 3+} or Tb{sup 3+} in the range of 0.01–0.05, chromaticity coordinates of ZnO:Tb/Y{sub 2}O{sub 3}:Eu nanocable stably stays at yellow region in color space except ZnO:Tb{sub 0.01}/Y{sub 2}O{sub 3}:Eu{sub 0.01}. As Vo states act as media in energy transfer process in nanocablers, visible light can stimulate dual-wavelength emissions. Yellow luminescent nanocable arrays will have great applications in light-emitting diode luminescence.

Yang, Lei, E-mail: nanoyang@qq.com [College of Materials Science and Engineering, Hunan University, Changsha 410082 (China); Hunan Province Key Laboratory for Spray Deposition Technology and Application, Hunan University, Changsha 410082 (China); Dong, Jiazhang; Jiang, Zhongcheng [College of Materials Science and Engineering, Hunan University, Changsha 410082 (China); Pan, Anlian; Zhuang, Xiujuan [Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, Hunan University, Changsha 410082 (China)

2014-06-14T23:59:59.000Z

365

Identification of Tat-SF1 cellular targets by exon array analysis reveals dual roles in transcription and splicing  

E-Print Network (OSTI)

discovered over a decade ago as a cellular protein required for Tat-specific, TAR-dependent activation of HIV) that Tat-SF1 is required for efficient HIV-1 propagation and showed that this host factor is requiredIdentification of Tat-SF1 cellular targets by exon array analysis reveals dual roles

Hartemink, Alexander

366

S-Band Dual-Polarization Radar Observations of Winter Storms PATRICK C. KENNEDY AND STEVEN A. RUTLEDGE  

E-Print Network (OSTI)

S-Band Dual-Polarization Radar Observations of Winter Storms PATRICK C. KENNEDY AND STEVEN A­Illinois State Water Survey (CSU­CHILL) system during four significant winter storms in northeastern Colorado. It was found that values of specific differential phase KDP often reached local maxima of ;0.158­0.48 km21

Rutledge, Steven

367

S-Band Dual Polarization Radar Observations of Winter Storms Patrick C. Kennedy and Steven A. Rutledge  

E-Print Network (OSTI)

1 S-Band Dual Polarization Radar Observations of Winter Storms Patrick C. Kennedy and Steven A wavelength CSU-CHILL system during four significant winter storms in northeastern Colorado. It was found that specific differential phase (KDP) values often reached local maxima of ~0.15 to 0.4o km-1 in an elevated

Rutledge, Steven

368

A Novel Dual-Patch Anti-Jam GPS Antenna Frank N. Bauregger, Todd Walter, Dennis Akos, and Per Enge,  

E-Print Network (OSTI)

A Novel Dual-Patch Anti-Jam GPS Antenna Frank N. Bauregger, Todd Walter, Dennis Akos, and Per Enge microstrip patch antenna has a broad radiation pattern and typically allows reception of signals from all visible GPS satellites. However, as normally im- plemented, the microstrip patch is susceptible to RFI

Stanford University

369

1 | P a g e Summary of Fish-Barge Interaction Research and Fixed Dual Frequency Identification Sonar  

E-Print Network (OSTI)

1 | P a g e Summary of Fish-Barge Interaction Research and Fixed Dual Frequency Identification of Engineers (USACE) and the U.S. Fish and Wildlife Service (USFWS) have conducted laboratory and field in the Chicago Sanitary and Ship Canal (CSSC) and the resulting impacts to fish behavior. The experiments

US Army Corps of Engineers

370

Sensitivity improvement of a laser interferometer limited by inelastic back-scattering, employing dual readout  

E-Print Network (OSTI)

Inelastic back-scattering of stray light is a long-standing problem in high-sensitivity interferometric measurements and a potential limitation for advanced gravitational-wave detectors, in particular at sub-audio-band frequencies. The emerging parasitic interferences cannot be distinguished from a scientific signal via conventional single readout. In this work, we propose and demonstrate the subtraction of inelastic back-scatter signals by employing dual homodyne detection on the output light -- here -- of a table-top Michelson interferometer. The additional readout contains solely parasitic signals and is used to model the scatter source. Subtraction of the scatter signal reduces the noise spectral density and thus improves the measurement sensitivity. Our scheme is qualitatively different from the previously demonstrated vetoing of scatter signals and opens a new path for improving the sensitivity of future gravitational-wave detectors.

Meinders, Melanie

2015-01-01T23:59:59.000Z

371

Development of a dual MCP framing camera for high energy x-rays  

SciTech Connect

Recently developed diagnostic techniques at LLNL require recording backlit images of extremely dense imploded plasmas using hard x-rays, and demand the detector to be sensitive to photons with energies higher than 50 keV [R. Tommasini et al., Phys. Phys. Plasmas 18, 056309 (2011); G. N. Hall et al., “AXIS: An instrument for imaging Compton radiographs using ARC on the NIF,” Rev. Sci. Instrum. (these proceedings)]. To increase the sensitivity in the high energy region, we propose to use a combination of two MCPs. The first MCP is operated in a low gain regime and works as a thick photocathode, and the second MCP works as a high gain electron multiplier. We tested the concept of this dual MCP configuration and succeeded in obtaining a detective quantum efficiency of 4.5% for 59 keV x-rays, 3 times larger than with a single plate of the thickness typically used in NIF framing cameras.

Izumi, N., E-mail: izumi2@llnl.gov; Hall, G. N.; Carpenter, A. C.; Allen, F. V.; Cruz, J. G.; Felker, B.; Hargrove, D.; Holder, J.; Lumbard, A.; Montesanti, R.; Palmer, N. E.; Piston, K.; Stone, G.; Thao, M.; Vern, R.; Zacharias, R.; Landen, O. L.; Tommasini, R.; Bradley, D. K.; Bell, P. M. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); and others

2014-11-15T23:59:59.000Z

372

Controlled rolling process for dual phase steels and application to rod, wire, sheet and other shapes  

DOE Patents (OSTI)

An improved, energy efficient, hot rolling method for direct production of cold formable dual-phase steel is provided. The steel is heated to completely austenitize it and then continuously hot rolled and cooled down into the ferrite-austenite two phase region to a temperature which is just below the effective Ar[sub 3] temperature. The hot rolled steel is then rapidly quenched to provide an alloy containing strong, tough lath martensite (fibers) in a ductile soft ferrite matrix. The method is particularly useful for providing rods in which form the alloy is capable of being drawn into high strength wire or the like in a cold drawing operation without any intermediate annealing or patenting, and has excellent strength, ductility and fatigue characteristics. 3 figs.

Thomas, G.; Ahn, J.H.; Kim, N.J.

1986-10-28T23:59:59.000Z

373

Implementation of dual-energy technique for virtual monochromatic and linearly mixed CBCTs  

SciTech Connect

Purpose: To implement dual-energy imaging technique for virtual monochromatic (VM) and linearly mixed (LM) cone beam CTs (CBCTs) and to demonstrate their potential applications in metal artifact reduction and contrast enhancement in image-guided radiation therapy (IGRT). Methods: A bench-top CBCT system was used to acquire 80 kVp and 150 kVp projections, with an additional 0.8 mm tin filtration. To implement the VM technique, these projections were first decomposed into acrylic and aluminum basis material projections to synthesize VM projections, which were then used to reconstruct VM CBCTs. The effect of VM CBCT on the metal artifact reduction was evaluated with an in-house titanium-BB phantom. The optimal VM energy to maximize contrast-to-noise ratio (CNR) for iodine contrast and minimize beam hardening in VM CBCT was determined using a water phantom containing two iodine concentrations. The LM technique was implemented by linearly combining the low-energy (80 kVp) and high-energy (150 kVp) CBCTs. The dose partitioning between low-energy and high-energy CBCTs was varied (20%, 40%, 60%, and 80% for low-energy) while keeping total dose approximately equal to single-energy CBCTs, measured using an ion chamber. Noise levels and CNRs for four tissue types were investigated for dual-energy LM CBCTs in comparison with single-energy CBCTs at 80, 100, 125, and 150 kVp. Results: The VM technique showed substantial reduction of metal artifacts at 100 keV with a 40% reduction in the background standard deviation compared to a 125 kVp single-energy scan of equal dose. The VM energy to maximize CNR for both iodine concentrations and minimize beam hardening in the metal-free object was 50 keV and 60 keV, respectively. The difference of average noise levels measured in the phantom background was 1.2% between dual-energy LM CBCTs and equivalent-dose single-energy CBCTs. CNR values in the LM CBCTs of any dose partitioning are better than those of 150 kVp single-energy CBCTs. The average CNR for four tissue types with 80% dose fraction at low-energy showed 9.0% and 4.1% improvement relative to 100 kVp and 125 kVp single-energy CBCTs, respectively. CNRs for low-contrast objects improved as dose partitioning was more heavily weighted toward low-energy (80 kVp) for LM CBCTs. Conclusions: Dual-energy CBCT imaging techniques were implemented to synthesize VM CBCT and LM CBCTs. VM CBCT was effective at achieving metal artifact reduction. Depending on the dose-partitioning scheme, LM CBCT demonstrated the potential to improve CNR for low contrast objects compared to single-energy CBCT acquired with equivalent dose.

Li Hao; Giles, William; Ren Lei; Bowsher, James; Yin Fangfang [Medical Physics Graduate Program, Duke University, Durham, North Carolina 27710 (United States); Department of Radiation Oncology, Duke University Medical Center, Durham, North Carolina 27710 (United States)

2012-10-15T23:59:59.000Z

374

A predictive model for the combustion process in dual fuel engines  

SciTech Connect

A multi-zone model has been developed for the prediction of the combustion processes in dual fuel engines and some of their performance features. The consequences of the interaction between the gaseous and the diesel fuels and the resulting modification to the combustion processes are considered. A reacting zone has been incorporated in the model to describe the partial oxidation of the gaseous fuel-air mixture while detailed kinetic schemes are employed to describe the oxidation of the gaseous fuel, right from the start of compression to the end of the expansion process. The associated formation and concentrations of exhaust emissions are correspondingly established. The model can predict the onset of knock as well as the operating features and emissions for the more demanding case of light load performance. Predicted values for methane operation show good agreement with corresponding experimental values.

Liu, Z.; Karim, G.A. [Univ. of Calgary, Alberta (Canada)

1995-12-31T23:59:59.000Z

375

Self-latching eccentric cam for dual stroke compressor or pump  

DOE Patents (OSTI)

For a dual capacity refrigerant compressor of the type which has an eccentric cam rotatable on a crankpin between two opposite positions which changes the total eccentricity of the crankpin and cam so as to obtain two different stroke lengths, the rotation of the cam on the crankpin being effected by a reversal of motor operation, the cam moves through an angle of about 270.degree. around the crankpin so that a centrifugal force torque tending to hold the cam in place is available at least in the reduced stroke length position of the cam, and by providing lightening cavities and eccentric weightings, the center of mass 74 of the cam can be shifted to obtain the centrifugal torque in the proper direction at both the maximum and reduced stroke positions.

Sisk, Francis J. (San Mateo, CA)

1985-01-01T23:59:59.000Z

376

Free energy calculations using dual-level Born-Oppenheimer molecular dynamics  

SciTech Connect

We describe an efficient and accurate method to compute free energy changes in complex chemical systems that cannot be described through classical molecular dynamics simulations, examples of which are chemical and photochemical reactions in solution, enzymes, interfaces, etc. It is based on the use of dual-level Born-Oppenheimer molecular dynamics simulations. A low-level quantum mechanical method is employed to calculate the potential of mean force through the umbrella sampling technique. Then, a high-level quantum mechanical method is used to estimate a free energy correction on selected points of the reaction coordinate using perturbation theory. The precision of the results is comparable to that of ab initio molecular dynamics methods such as the Car-Parrinello approach but the computational cost is much lower, roughly by two to three orders of magnitude. The method is illustrated by discussing the association free energy of simple organometallic compounds, although the field of application is very broad.

Retegan, Marius; Martins-Costa, Marilia; Ruiz-Lopez, Manuel F. [Theoretical Chemistry and Biochemistry Group, SRSMC, CNRS, Nancy-University, BP 70239, 54506 Vandoeuvre-les-Nancy (France)

2010-08-14T23:59:59.000Z

377

Dual axis translation apparatus and system for translating an optical beam and related method  

DOE Patents (OSTI)

A dual axis translation device and system in accordance with this invention, for translating an optical beam along both an x-axis and a y-axis which are perpendicular to one another, has a beam directing means acting on said optical beam for directing the beam along a particular path transverse to said x and y axes. An arrangement supporting said beam directing means for movement in the x and y direction within a given plane is provided. The arrangement includes a first means for translating said beam directing means along the x-axis in said given plane in order to translate the beam along said x-axis. The arrangement comprises a second means for translating said beam directing means along the y-axis in said given plane in order to translate the beam along said y-axis.

Cassidy, Kelly (Manteca, CA)

1991-01-01T23:59:59.000Z

378

A Simple But Effective Canonical Dual Theory Unified Algorithm for Global Optimization  

E-Print Network (OSTI)

Numerical global optimization methods are often very time consuming and could not be applied for high-dimensional nonconvex/nonsmooth optimization problems. Due to the nonconvexity/nonsmoothness, directly solving the primal problems sometimes is very difficult. This paper presents a very simple but very effective canonical duality theory (CDT) unified global optimization algorithm. This algorithm has convergence is proved in this paper. More important, for this CDT-unified algorithm, numerous numerical computational results show that it is very powerful not only for solving low-dimensional but also for solving high-dimensional nonconvex/nonsmooth optimization problems, and the global optimal solutions can be easily and elegantly got with zero dual gap.

Jiapu Zhang

2011-05-11T23:59:59.000Z

379

Fuzzy logic control strategy of wind generator based on the dual-stator induction generator  

Science Journals Connector (OSTI)

Abstract The work presented in this paper is the evaluation of the variable speed wind turbine based on dual star induction generator (DSIG) connected for power optimization in the conversion chain connected to the electrical grid. This optimization is concretized by two methods, namely, the Maximum Power Point Tracking ‘MPPT’ algorithm in the case where the characteristic of the turbine is known and the nonlinear method based on the theory of fuzzy logic controlled torque which is most appropriate when there is a lack of information on the characteristic ( C p ( ? ) ) of the turbine. However, the limitation of power is performed by action on the generator control only. Simulation results are presented and discussed.

Samira Chekkal; Narimen Aouzellag Lahaçani; Djamal Aouzellag; Kaci Ghedamsi

2014-01-01T23:59:59.000Z

380

A novel dual stator-winding induction generator system applied in wind power generation  

Science Journals Connector (OSTI)

This paper presents a novel usage of 6/3-phase dual stator-winding induction generator (DWIG) with a static excitation power controller (SEC) as a wind power generator. This generator is composed of a standard squirrel-cage rotor and two sets of winding housed in the stator slots. One is referred to as the 6-phase power winding, and the other is defined as the 3-phase control winding. On the basis of the instantaneous power theory, the control mechanism of DWIG wind power system is analysed, and the control winding flux orientation control strategy is obtained consequently. The simulation and experimental results from a prototype of 18 kW 6/3-phase DWIG wind power system are presented to verify the correctness and feasibility of control strategy, and a desirable performance is implemented.

Bu Feifei; Huang Wenxin; Hu Yuwen; Shi Kai

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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
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381

Dual annular rotating [open quotes]windowed[close quotes] nuclear reflector reactor control system  

DOE Patents (OSTI)

A nuclear reactor control system is provided in a nuclear reactor having a core operating in the fast neutron energy spectrum where criticality control is achieved by neutron leakage. The control system includes dual annular, rotatable reflector rings. There are two reflector rings: an inner reflector ring and an outer reflector ring. The reflectors are concentrically assembled, surround the reactor core, and each reflector ring includes a plurality of openings. The openings in each ring are capable of being aligned or non-aligned with each other. Independent driving means for each of the annular reflector rings is provided so that reactor criticality can be initiated and controlled by rotation of either reflector ring such that the extent of alignment of the openings in each ring controls the reflection of neutrons from the core. 4 figures.

Jacox, M.G.; Drexler, R.L.; Hunt, R.N.M.; Lake, J.A.

1994-03-29T23:59:59.000Z

382

Blue-enhanced thin-film photodiode for dual-screen x-ray imaging  

SciTech Connect

This article reports on a-Si:H-based low-leakage blue-enhanced photodiodes for dual-screen x-ray imaging detectors. Doped nanocrystalline silicon was incorporated in both the n- and p-type regions to reduce absorption losses for light incoming from the top and bottom screens. The photodiode exhibits a dark current density of 900 pA/cm{sup 2} and an external quantum efficiency up to 90% at a reverse bias of 5 V. In the case of illumination through the tailored p-layer, the quantum efficiency of 60% at a 400 nm wavelength is almost double that for the conventional a-Si:H n-i-p photodiode.

Vygranenko, Y.; Vieira, M. [Department of Electronics, Telecommunications and Computer Engineering, ISEL, Lisbon 1949-014 (Portugal); Sazonov, A. [Electrical and Computer Engineering, University of Waterloo, Waterloo N2L 3G1 (Canada); Heiler, G.; Tredwell, T. [Carestream Health, Inc., Rochester, New York 14652-3487 (United States); Nathan, A. [London Centre for Nanotechnology, University College London, London WC1H 0AH (United Kingdom)

2009-12-28T23:59:59.000Z

383

Thickness measurement system for transparent plates using dual digital versatile disc (DVD) pickups  

SciTech Connect

A low-cost high-precision thickness measurement system for transparent plates that uses dual digital versatile disc (DVD) pickups is proposed. The two DVD pickups are used as the transmitter and the receiver in the measurement system, respectively. One of the DVD pickups emits a laser to the other DVD pickup (receiver) and projects on the photodiode integrated circuit of the receiver. The transparent plate is placed in the optical path to change the focused point that will affect the focusing error signal (FES) of the receiver. Using the FES, a mathematical model for thickness measurement based on the geometric optical method is developed. The experimental results show that the accuracy is 1.5 {mu}m, and the uncertainty is estimated to be {+-}1.37 {mu}m for the measured thickness of 150{mu}m.

Liu, Chien-Hung; Yeh, Shien-Chang; Huang, Hsueh-Liang

2010-02-01T23:59:59.000Z

384

A Novel Trigon based Dual Authentication Protocol for Enhancing Security in Grid Environment  

E-Print Network (OSTI)

In recent times, a necessity has been raised in order to distribute computing applications often across grids. These applications are dependent on the services like data transfer or data portal services as well as submission of jobs. Security is of utmost importance in grid computing applications as grid resources are heterogeneous, dynamic, and multidomain. Authentication remains as the significant security challenge in grid environment. In traditional authentication protocol a single server stores the sensitive user credentials, like username and password. When such a server is compromised, a large number of user passwords, will be exposed. Our proposed approach uses a dual authentication protocol in order to improve the authentication service in grid environment. The protocol utilizes the fundamental concepts of trigon and based on the parameters of the trigon the user authentication will be performed. In the proposed protocol, the password is interpreted and alienated into more than one unit and these uni...

Ruckmani, V

2010-01-01T23:59:59.000Z

385

Dual bed reactor for the study of catalytic biomass tars conversion  

SciTech Connect

A dual fixed bed laboratory scale set up has been used to compare the activity of a novel Rh/LaCoO{sub 3}/Al{sub 2}O{sub 3} catalyst to that of dolomite, olivine and Ni/Al{sub 2}O{sub 3}, typical catalysts used in fluidized bed biomass gasification, to convert tars produced during biomass devolatilization stage. The experimental apparatus allows the catalyst to be operated under controlled conditions of temperature and with a real gas mixture obtained by the pyrolysis of the biomass carried out in a separate fixed bed reactor operated under a selected and controlled heating up rate. The proposed catalyst exhibits much better performances than conventional catalysts tested. It is able to completely convert tars and also to strongly decrease coke formation due to its good redox properties. (author)

Ammendola, P.; Piriou, B.; Lisi, L.; Ruoppolo, G.; Chirone, R.; Russo, G. [Istituto di Ricerche sulla Combustione - CNR, P.le V. Tecchio 80, 80125 Napoli (Italy)

2010-04-15T23:59:59.000Z

386

New ultra-deepwater rig with dual rotaries will reduce costs  

SciTech Connect

The Discoverer Enterprise, a next generation, ultra-deepwater drill ship with a dual rotary system, will decrease drilling and completion costs by reducing bottom hole assembly (BHA) and tubular preparation time. Transocean Offshore received a contract from Amoco Corp. to build the ultra-deep floating rig and is scheduled to spud its first well in July 1998. It will generally work in water deeper than 6,000 ft. The rig design involves a new approach that addresses the overall well-construction process and equipment required to decrease significantly deepwater drilling time. The Discoverer is the first ultra-deepwater rig designed specifically for handling subsea completions and extended well tests. The paper discusses increased deepwater rig demand, rig construction costs, drillship design, well construction, development drilling, and cost justification.

Cole, J.C.; Herrmann, R.P.; Scott, R.J. [Transocean Offshore Inc., Houston, TX (United States); Shaughnessy, J.M. [Amoco Corp., Houston, TX (United States)

1997-05-26T23:59:59.000Z

387

Dual harmonic Kelvin probe force microscopy at the graphene–liquid interface  

SciTech Connect

Kelvin probe force microscopy (KPFM) is a powerful technique for the determination of the contact potential difference (CPD) between an atomic force microscope tip and a sample under ambient and vacuum conditions. However, for many energy storage and conversion systems, including graphene-based electrochemical capacitors, understanding electrochemical phenomena at the solid–liquid interface is paramount. Despite the vast potential to provide fundamental insight for energy storage materials at the nanoscale, KPFM has found limited applicability in liquid environments to date. Here, using dual harmonic (DH)-KPFM, we demonstrate CPD imaging of graphene in liquid. We find good agreement with measurements performed in air, highlighting the potential of DH-KPFM to probe electrochemistry at the graphene–liquid interface.

Collins, Liam; Rodriguez, Brian J., E-mail: brian.rodriguez@ucd.ie [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland); Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 (Ireland); Kilpatrick, Jason I.; Weber, Stefan A. L. [Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin 4 (Ireland); Vlassiouk, Ivan V. [Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Tselev, Alexander; Jesse, Stephen; Kalinin, Sergei V. [Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

2014-03-31T23:59:59.000Z

388

Future projections for domestic consumption of dual purpose kerosene in Nigeria  

Science Journals Connector (OSTI)

This paper looks at three socio-economic variables in energy consumption framework for energy planning in Nigeria. The consumption of dual purpose kerosene (DPK) was regressed against the real gross domestic product (GDP), commodity's price, and the lagged variable considering a period of 32 years (1970-2001). A statistical model was developed for the local consumption using partial adjustment model with three independent variables. Some statistical tests were carried out which revealed that consumption was significantly related to the three components. Local consumption of DPK was forecast for the period 2001 to 2025 using three different scenarios of the growth rates (the low, the base and the high growth rates) of the independent variables. Expectedly, result shows that consumption is greatest for high GDP/low price and minimum for low GDP/high price scenario.

Adekunle Omolade Adelaja; Sunday Joshua Ojolo

2013-01-01T23:59:59.000Z

389

Solar Photo Catalytic Hydrogen Production from water using a dual bed photosystem  

SciTech Connect

A body of work was performed in which the feasibility of photocatalytically decomposing water into its constituent elements using a dual bed, or modular photosystem, under solar radiation was investigated. The system envisioned consists of two modules, each consisting of a shallow, flat, sealed container, in which microscopic photocatalytic particles are immobilized. The photocatalysts absorb light, generating free electrons and lattice vacancy holes, which are capable of performing reductive and oxidative chemistry, respectively. The photocatalysts would be chosen as to whether they specifically promote H{sub 2} or O{sub 2} evolution in their respective containers. An aqueous solution containing a redox mediator is pumped between the two chambers in order to transfer electron equivalents from one reaction to the other.

Florida Solar Energy Center

2003-03-30T23:59:59.000Z

390

Dual fuel study for the Liepaja Thermal Power Plant. Final report. Export trade information  

SciTech Connect

This study, conducted by Burns and Roe Company, was funded by the U.S. Trade and Development Agency. The report presents the results of engineering studies performed for Latvenergo-the National Electric Utility of Latvia. The work performed is a supplement to a previous study, completed in January, 1994, that defined the basic plant design and site selection for the 300 MW coal-fired plant. The current study expands on the previous work in two main areas; the technical and economic feasibility of integrating natural gas firing technologies into the plant design, and aspects of additional plant site not previously considered. The report is divided into the following sections: (1) Introduction; (2) Technical and Economic Aspects of Plant Design For Dual Capability; (3) Assessment of Natural Gas Supplies; (4) Evaluation of Candidate Sites. Appendices A-C follows.

NONE

1996-04-01T23:59:59.000Z

391

The Self-dual String Soliton in AdS_4\\times S^7 spacetime  

E-Print Network (OSTI)

We construct self-dual string soliton solutions in $AdS_4\\times S^7$ spacetime, starting from the covariant equations of motion of M5-brane. We study the properties of the solutions and find that their action are linearized, indicating the BPS nature of the solutions, and they have the same electric and magnetic charge. The straight string soliton solution represents the configuration of the membranes ending on M5-brane with a straight string intersection, and it behaves like the spiky solution in flat spacetime. The spherical string soliton solution, which could be related to the straight one by a conformal transformation, represents the membranes ending on M5-brane with a spherical intersection.

Bin Chen

2007-10-13T23:59:59.000Z

392

Physical properties of erbium implanted tungsten oxide filmsdeposited by reactive dual magnetron sputtering  

SciTech Connect

Amorphous and partially crystalline WO3 thin films wereprepared by reactive dual magnetron sputtering and successively implantedby erbium ions with a fluence in the range from 7.7 x 1014 to 5 x 1015ions/cm2. The electrical and optical properties were studied as afunction of the film deposition parameters and the ion fluence. Ionimplantation caused a strong decrease of the resistivity, a moderatedecrease of the index of refraction and a moderate increase of theextinction coefficient in the visible and near infrared, while theoptical band gap remained almost unchanged. These effects could belargely ascribed to ion-induced oxygen deficiency. When annealed in air,the already low resistivities of the implanted samples decreased furtherup to 70oC, whereas oxidation, and hence a strong increase of theresistivity, was observed at higher annealing temperatures.

Mohamed, Sodky H.; Anders, Andre

2006-11-08T23:59:59.000Z

393

A Dual Channel X-ray Spectrometer for Fast Ignition Research  

SciTech Connect

A new Dual Channel Highly Ordered Pyrolytic Graphite (DC-HOPG) x-ray spectrometer was developed to study laser-generated electron beam transport. The instrument uses a pair of graphite crystals and has the advantage of simultaneously detecting self emission from low-Z materials in first diffraction order and high-Z materials in second order. The emissions from the target are detected using a pair of parallel imaging plates positioned in a such way that the noise from background is minimized and the mosaic focusing is achieved. Initial tests of the diagnostic on Titan laser (I {approx} 10{sup 20} W/cm{sup 2}, {tau} = 0.7 ps) show excellent signal-to-noise ratio (SNR) > 1000 for the low energy channel and SNR > 400 for the high energy channel.

Akli, K U; Patel, P K; Van Maren, R; Stephens, R B; Key, M H; Higginson, D P; Westover, B; Chen, C D; Mackinnon, A J; Bartal, T; Beg, F N; Chawla, S; Fedosejevs, R; Freeman, R R; Hey, D S; Kemp, G E; LePape, S; Link, A; Ma, T; MacPhee, A G; McLean, H S; Ping, Y; Tsui, Y Y; Van Woerkom, L D; Wei, M S; Yabuuchi, T

2010-04-19T23:59:59.000Z

394

Dual-Remote Raman Technology for In-Situ Identification of Tank Waste - 13549  

SciTech Connect

A new Raman spectroscopic system for in-situ identification of the composition of solid nuclear tank waste is being developed by collaborative effort between Pacific Northwest National Laboratory (PNNL) and EIC Laboratories, Inc. The recent advancements in Raman technology allow probing the chemical composition of the tank waste without sample collection. In the newly tested configuration, the Raman probe is installed on the top of the tank riser and sends the incident laser beam to the bottom of the tank, 10 - 70 feet away. The returning light containing chemical information is collected by the Raman probe and is transmitted via fiber optic cable to the spectrometer located outside the tank farm area. This dual remote technology significantly expands currently limited options for the safe rapid in-situ identification of the solid tank waste needed for the retrieval decisions. The developed Raman system was extensively tested for acceptability prior to tank farm deployment. This testing included calibration of the system with respect of the distance between the Raman probe and the sample, incident laser beam angle, and presence of the optical interferences. The Raman system was successfully deployed on Tank C-111 at the US DOE Hanford site. As the result of this deployment, the composition of the hardpan at the bottom of C-111 tank was identified. Further development of the dual-remote Raman technology will provide a significant safety enhancement eliminating the potential of personnel radiation exposure associated with the grab sample collection and expands options of the rapid and cost-effective in-situ chemical analysis of the tank waste. (authors)

Bryan, Sam; Levitskaia, Tatiana; Lines, Amanda; Smith, Frannie; Josephson, Gary [Pacific Northwest National Laboratory, Richland WA, 99352 (United States)] [Pacific Northwest National Laboratory, Richland WA, 99352 (United States); Bello, Job [EIC, Inc., Norwood, MA 02062 (United States)] [EIC, Inc., Norwood, MA 02062 (United States)

2013-07-01T23:59:59.000Z

395

A DUAL-BAND MILLIMETER-WAVE KINETIC INDUCTANCE CAMERA FOR THE IRAM 30 m TELESCOPE  

SciTech Connect

The Neel IRAM KIDs Array (NIKA) is a fully integrated measurement system based on kinetic inductance detectors (KIDs) currently being developed for millimeter wave astronomy. The instrument includes dual-band optics allowing simultaneous imaging at 150 GHz and 220 GHz. The imaging sensors consist of two spatially separated arrays of KIDs. The first array, mounted on the 150 GHz branch, is composed of 144 lumped-element KIDs. The second array (220 GHz) consists of 256 antenna-coupled KIDs. Each of the arrays is sensitive to a single polarization; the band splitting is achieved by using a grid polarizer. The optics and sensors are mounted in a custom dilution cryostat, with an operating temperature of {approx}70 mK. Electronic readout is realized using frequency multiplexing and a transmission line geometry consisting of a coaxial cable connected in series with the sensor array and a low-noise 4 K amplifier. The dual-band NIKA was successfully tested in 2010 October at the Institute for Millimetric Radio Astronomy (IRAM) 30 m telescope at Pico Veleta, Spain, performing in-line with laboratory predictions. An optical NEP was then calculated to be around 2 x 10{sup -16} W Hz{sup -1/2} (at 1 Hz) while under a background loading of approximately 4 pW pixel{sup -1}. This improvement in comparison with a preliminary run (2009) verifies that NIKA is approaching the target sensitivity for photon-noise limited ground-based detectors. Taking advantage of the larger arrays and increased sensitivity, a number of scientifically relevant faint and extended objects were then imaged including the Galactic Center SgrB2 (FIR1), the radio galaxy Cygnus A, and the NGC1068 Seyfert galaxy. These targets were all observed simultaneously in the 150 GHz and 220 GHz atmospheric windows.

Monfardini, A.; Benoit, A.; Bideaud, A.; Swenson, L.; Cruciani, A.; Camus, P.; Hoffmann, C. [Institut Neel, CNRS and Universite Joseph Fourier (UJF), Grenoble F-38042 (France); Desert, F. X. [Institut de Planetologie et d'Astrophysique, UJF and CNRS-INSU, Grenoble F-38041 (France); Doyle, S.; Ade, P.; Mauskopf, P.; Tucker, C. [Cardiff School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom); Roesch, M.; Leclercq, S.; Schuster, K. F. [Institut de RadioAstronomie Millimetrique (IRAM), Saint Martin d'Heres F-38406 (France); Endo, A. [Kavli Institute of NanoScience, Delft University of Technology, 2628 CJ Delft (Netherlands); Baryshev, A.; Baselmans, J. J. A.; Ferrari, L.; Yates, S. J. C, E-mail: monfardini@grenoble.cnrs.fr [SRON, Netherlands Institute for Space Research, 3584 CA Utrecht and 9700 AV Groningen (Netherlands)

2011-06-01T23:59:59.000Z

396

NETL: Robust and Energy Efficient Dual-Stage Membrane-Based Process for  

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

Robust and Energy Efficient Dual-Stage Membrane-Based Process for Enhanced CO2 Capture Robust and Energy Efficient Dual-Stage Membrane-Based Process for Enhanced CO2 Capture Project No.: DE-FE0013064 Media and Process Technology, Inc is developing a "one-box process" that integrates the water-gas-shift (WGS) reaction in a membrane reactor (MR) with hydrogen recovery for CO2 capture in integrated gasification combined cycle (IGCC) power systems. The process utilizes previously developed hydrogen (H2)-selective carbon molecular sieve membranes (CMS) and novel palladium (Pd) and Pd-alloy membranes for efficient residual H2 recovery. The bench-scale system will operate with simulated syngas mixtures first, and then be evaluated with real syngas at the National Carbon Capture Center for performance and long-term operation stability. Coal-derived syngas, after quenching and particulate removal, will undergo tar and contaminant removal, carbon monoxide conversion via WGS with a sour shift catalyst, and H2 separation in a single step. The bulk of the H2 produced (with purity adequate for downstream power generation) will be recovered in the permeate stream of this novel WGS/MR. The retentate stream (containing the residual H2 and the bulk of CO2 produced), after undergoing a conventional cold gas clean up for the removal of tar and contaminants, will be sent for CO2 compression for storage or use. Through the CO2 compression train, the residual H2 will be further recovered with a highly selective-Pd alloy membrane. A high degree of H2 (and consequently CO2) recovery can be achieved with the two-step membrane process. The strengths of CMS and Pd membranes are fully utilized while their weaknesses are compensated-for by the synergy that is being created by this novel two-stage process.

397

Dual-energy contrast-enhanced breast tomosynthesis: optimization of beam quality for dose and image quality  

Science Journals Connector (OSTI)

Dual-energy contrast-enhanced breast tomosynthesis is a promising technique to obtain three-dimensional functional information from the breast with high resolution and speed. To optimize this new method, this study searched for the beam quality that maximized image quality in terms of mass detection performance. A digital tomosynthesis system was modeled using a fast ray-tracing algorithm, which created simulated projection images by tracking photons through a voxelized anatomical breast phantom containing iodinated lesions. The single-energy images were combined into dual-energy images through a weighted log subtraction process. The weighting factor was optimized to minimize anatomical noise, while the dose distribution was chosen to minimize quantum noise. The dual-energy images were analyzed for the signal difference to noise ratio (SdNR) of iodinated masses. The fast ray-tracing explored 523?776 dual-energy combinations to identify which yields optimum mass SdNR. The ray-tracing results were verified using a Monte Carlo model for a breast tomosynthesis system with a selenium-based flat-panel detector. The projection images from our voxelized breast phantom were obtained at a constant total glandular dose. The projections were combined using weighted log subtraction and reconstructed using commercial reconstruction software. The lesion SdNR was measured in the central reconstructed slice. The SdNR performance varied markedly across the kVp and filtration space. Ray-tracing results indicated that the mass SdNR was maximized with a high-energy tungsten beam at 49 kVp with 92.5 µm of copper filtration and a low-energy tungsten beam at 49 kVp with 95 µm of tin filtration. This result was consistent with Monte Carlo findings. This mammographic technique led to a mass SdNR of 0.92 ± 0.03 in the projections and 3.68 ± 0.19 in the reconstructed slices. These values were markedly higher than those for non-optimized techniques. Our findings indicate that dual-energy breast tomosynthesis can be performed optimally at 49 kVp with alternative copper and tin filters, with reconstruction following weighted subtraction. The optimum technique provides best visibility of iodine against structured breast background in dual-energy contrast-enhanced breast tomosynthesis.

Ehsan Samei; Robert S Saunders Jr

2011-01-01T23:59:59.000Z

398

Analysis of the useable power of a dual-worm mixer with a modular impeller configuration for the production of rubber-asphalt compositions  

Science Journals Connector (OSTI)

One possible alternative means is presented for analysis of the power of a continuous-action dual-worm mixer by ascertaining the useful power of the components of a sectional impeller through determination of ...

M. V. Zabavnikov; P. S. Belyaev; O. G. Malikov…

2009-11-01T23:59:59.000Z

399

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 38, NO. 10, OCTOBER 2003 1739 A Dual-Path Bandwidth Extension Amplifier Topology  

E-Print Network (OSTI)

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 38, NO. 10, OCTOBER 2003 1739 A Dual-Path Bandwidth amplifiers. I. INTRODUCTION DRIVEN by the proliferation of battery-powered portable electronic equipment

Lee, Hoi

400

1210 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 41, NO. 5, MAY 2006 A SiGe PA With Dual Dynamic Bias Control and  

E-Print Network (OSTI)

1210 IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 41, NO. 5, MAY 2006 A SiGe PA With Dual Dynamic from the battery, is the key factor determining the talk time and battery life for portable wireless

Asbeck, Peter M.

Note: This page contains sample records for the topic "4-valve dual overhead" 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

The effects of physical factors on the quality of the dual high-energy identification of the material of an inspected object  

Science Journals Connector (OSTI)

A significance criterion was formulated for the effect of physical factors on the quality of the dual high-energy identification of the material of an inspected ... the effects of different physical factors on th...

S. P. Osipov; A. K. Temnik; S. V. Chakhlov

2014-08-01T23:59:59.000Z

402

Influence of mean gas residence time in the bubbling fluidised bed on the performance of a 100-kW dual fluidised bed steam gasifier  

Science Journals Connector (OSTI)

In this study, the influence of mean gas residence time in the bubbling fluidised bed, ? f..., on the performance of a pilot scale 100 kW dual fluidised bed gasifier was experimentally investigate...

W. L. Saw; S. S. Pang

2012-09-01T23:59:59.000Z

403

Modifications in the Technical Specifications: Dual piston in series pump with servo-controlled variable stroke drive, floating pistons is with specs  

E-Print Network (OSTI)

Modifications in the Technical Specifications: Pump: Dual piston in series pump with servo-controlled variable stroke drive, floating pistons is with specs mentioned below are acceptable Set points 0.001 - 10

Bhalla, Upinder S.

404

KUB5/HERA: a dual acting protein that suppresses genomic instability and promotes DNA repair after low dose IR exposure  

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

KUB5/HERA: a dual acting protein that suppresses genomic instability and KUB5/HERA: a dual acting protein that suppresses genomic instability and promotes DNA repair after low dose IR exposure Julio C. Morales 1 , Amy Rommel 1 , Konstantin Leskov 2 , Walter M. Hittelman 3 , David A. Boothman 1# 1 Simmons Cancer Center, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA. 2 Department of Radiation Oncology, Case Western Reserve University, Cleveland, OH 44106, USA. 3 Department of Experimental Therapeutics, M.D. Anderson Cancer Center, Houston, TX 77030, USA. # To whom correspondence should be addressed. E-mail: David.Boothman@utsouthwestern.edu Eukaryotic cells can respond to DNA double strand breaks created by low doses of IR by activating homologous recombination (HR) or non-homologous end- joining (NHEJ) pathways to repair DNA. A yeast two-hybrid screen using Ku70 as

405

An ECT/ERT dual-modality sensor for oil-water two-phase flow measurement  

SciTech Connect

This paper presents a new sensor for ECT/ERT dual-modality system which can simultaneously obtain the permittivity and conductivity of the materials in the pipeline. Quasi-static electromagnetic fields are produced by the inner electrodes array sensor of electrical capacitance tomography (ECT) system. The results of simulation show that the data of permittivity and conductivity can be simultaneously obtained from the same measurement electrode and the fusion of two kinds of data may improve the quality of the reconstructed images. For uniform oil-water mixtures, the performance of designed dual-modality sensor for measuring the various oil fractions has been tested on representative data and the results of experiments show that the designed sensor broadens the measurement range compared to single modality.

Wang, Pitao [School of Electronic Engineering and Automation, Tianjin University, 300072 and School of Electronic Engineering, University of Jinan (China); Wang, Huaxiang; Sun, Benyuan; Cui, Ziqiang [School of Electronic Engineering and Automation, Tianjin University, 300072 (China); Huang, Wenrui [HuaDian Heavy Industries Co. Ltd, Beijing, 100077 (China)

2014-04-11T23:59:59.000Z

406

Design and Realize of the Graphics Platform for LED Lamps’ Layout Based on GDI+ and Dual-Buffer  

Science Journals Connector (OSTI)

Based on the GDI+ class library and dual-buffer technology of .NET framework, the software for LED lamps’ layout is developed. On the basis of determining the scheme of layout platform, the metafile class library model by Composite design-set and the process of calling the LED pixels metafile symbol interface are designed firstly. The design method of realizing the LED pixels metafile visual editing on the drawn LED logical pixel based on GDI+ is analyzed. The dual-buffer technology is used to solve the problem of flicker when fast refreshing. The testing results show that the platform can meet the basic function requirements of engineering application, and realize partial adjust on the process of LED lamps layout without distortion.

Wen Yuanmei; Nie Xinming; Liu Guixiong

2012-01-01T23:59:59.000Z

407

Experimental investigation of DI diesel engine operating with eucalyptus biodiesel/natural gas under dual fuel mode  

Science Journals Connector (OSTI)

Abstract With the gradual depletion of petroleum and environmental degradation, intensive research activity has been addressed to the utilization of alternative fuels in internal combustion engines. In the present work, an experimental investigation is carried out to study the effect of eucalyptus biodiesel and natural gas under dual fuel combustion mode on the performance and the exhaust emissions of a single cylinder DI diesel engine. The natural gas (NG) is inducted with the intake air through the inlet manifold. The liquid pilot fuel (eucalyptus biodiesel or diesel fuel) is injected into the combustion chamber to cover approximately 10% of the maximum power output. Then, keeping constant the pilot fuel flow rate, the power output is further increased using only natural gas. The combustion characteristics (cylinder pressure, ignition delay and heat release rate), performance and exhaust emissions of the dual fuel mode (NG–diesel fuel and NG–biodiesel) are compared with those of conventional diesel engine mode at various load conditions. The combustion analysis has shown that biodiesel as pilot fuel exhibits similar pressure–time history, with highest peak, as diesel fuel in conventional and dual fuel modes. The performance and pollutant emission results show that, compared to diesel fuel in dual fuel mode, the use of eucalyptus biodiesel as pilot fuel reduces the high emission levels of unburned hydrocarbon (HC), carbon monoxide (CO) and carbon dioxide (CO2) particularly at high engine loads. However this is accompanied by an increase in the brake specific fuel consumption (BSFC) and the nitrogen oxide (NOx) emissions, which can be explained by the lower calorific value and the oxygen presence in the molecule of the eucalyptus biodiesel, respectively.

L. Tarabet; K. Loubar; M.S. Lounici; K. Khiari; T. Belmrabet; M. Tazerout

2014-01-01T23:59:59.000Z

408

Numerical and Experimental Analysis of Combustion and Exhaust Emissions in a Dual-Fuel Diesel/Natural Gas Engine  

Science Journals Connector (OSTI)

Department of Mechanical Engineering, UTV, University of Rome Tor Vergata, Rome, Italy, and IM-CNR, Istituto Motori of Italian National Research Council, Naples, Italy ... Accordingly, the use of NG as primary fuel allows the same compression ratio of the conventional diesel engine; thus, existing diesel engines can be easily converted to dual-fuel operation. ... Thus, a more general combustion model (G-equation or EDC) could be considered to represent flame propagation. ...

Stefano Cordiner; Michele Gambino; Sabato Iannaccone; Vittorio Rocco; Riccardo Scarcelli

2008-02-21T23:59:59.000Z

409

Implementation of a Dual Containment/Surveillance System utilizing scene-change detection and radio frequency technology  

SciTech Connect

This paper will examine the implementation of scene-change detection and radio frequency technology within a Dual Containment/Surveillance (C/S) System. Additionally, this paper will examine the human performance factors in the operation of these systems. Currently, Westinghouse Savannah River Company utilizes the Continuous Item Monitoring and Surveillance System (CIMS) in the performance of Dual C/S to monitor special nuclear materials within International Atomic Energy Agency (IAEA) Safeguards and Domestic Safeguards. CIMS is comprised of the Material Monitoring System (MMS) (R), a multi-media electronic surveillance system developed by Sandia National Laboratory which incorporates the use of active seals commonly called Radio Frequency Tamper Indicating Devices (RFTIDs), NT Vision (R) as developed by Los Alamos National Laboratory, a Microsoft Windows NT (R) based operating system providing for domestic scene-change detection and the Digital Multi-Camera Optical Surveillance System (DMOS) (R) which provides scene-change detection for IAEA. Although this paper will focus on the implementation of Dual C/S utilizing the Continuous Item Monitoring and Surveillance System, the necessity for a thorough review of Safeguards and Security requirements with organizations and personnel having minimal to no prior MPC&A training will also be covered. Successful Dual C/S implementation plans must consider not only system design and failure modes, but must also be accompanied with the appropriate ''mind shift'' within operations and technical personnel. This is required to ensure completion of both physical and electronic activities, and system design changes are performed conscientiously and with full awareness of MPC&A requirements.

FITZGERALD, ERIC; KOENIG, RICHARD

2005-06-27T23:59:59.000Z

410

IDENTIFICATION OF OUTFLOWS AND CANDIDATE DUAL ACTIVE GALACTIC NUCLEI IN SDSS QUASARS AT z = 0.8-1.6  

SciTech Connect

We present a sample of 131 quasars from the Sloan Digital Sky Survey at redshifts 0.8 < z < 1.6 with double peaks in either of the high-ionization narrow emission lines [Ne V] {lambda}3426 or [Ne III] {lambda}3869. These sources were selected with the intention of identifying high-redshift analogs of the z < 0.8 active galactic nuclei (AGNs) with double-peaked [O III] {lambda}5007 lines, which might represent AGN outflows or dual AGNs. Lines of high ionization potential are believed to originate in the inner, highly photoionized portion of the narrow line region, and we exploit this assumption to investigate the possible kinematic origins of the double-peaked lines. For comparison, we measure the [Ne V] {lambda}3426 and [Ne III] {lambda}3869 double peaks in low-redshift (z < 0.8) [O III]-selected sources. We find that [Ne V] {lambda}3426 and [Ne III] {lambda}3869 show a correlation between line splitting and line width similar to that of [O III] {lambda}5007 in other studies, and the velocity splittings are correlated with the quasar Eddington ratio. These results suggest an outflow origin for at least a subset of the double peaks, allowing us to study the high-ionization gas kinematics around quasars. However, we find that a non-negligible fraction of our sample show no evidence for an ionization stratification. For these sources, the outflow scenario is less compelling, leaving the dual AGN scenario as a viable possibility. Finally, we find that our sample shows an anti-correlation between the velocity-offset ratio and luminosity ratio of the components, which is a potential dynamical argument for the presence of dual AGNs. Therefore, this study serves as a first attempt at extending the selection of candidate dual AGNs to higher redshifts.

Barrows, R. Scott; Lacy, Claud H. Sandberg; Kennefick, Julia; Kennefick, Daniel; Berrier, Joel C. [Arkansas Center for Space and Planetary Sciences, University of Arkansas, Fayetteville, AR 72701 (United States); Comerford, Julia M., E-mail: rbarrows@uark.edu [Astronomy Department, University of Texas at Austin, Austin, TX 78712 (United States)

2013-06-01T23:59:59.000Z

411

Design of dual column water purification system for industrial gamma irradiator based of PUROLITE® resins  

Science Journals Connector (OSTI)

Abstract When gamma irradiators are not in use, they have to be stored in nuclear grade water pool. This water serves as shielding and the medium for the removal of generated heat. To prevent corrosion damage to the gamma source and other equipment a purification system controls the water quality. Also, this system serves as the make-up water system for supplies and maintains the de-ionized water level in the gamma source storage pool. In this paper, the design of the dual system for purification and make-up water for optimal water supply and its chemical parameters in the gamma source storage pool is presented. For this purpose, the characteristics of activated carbon purifier, anionic and cationic demineralizers have been determined. “Aerb Safety Standard”, “Purolite Ion Exchange Design Code” and “Canadian Water Refining Company Manual” have been used to design IR-136 gamma irradiator storage pool purification and make-up water system. The main objective of the design is to maintain water purity throughout the storage time.

Reza Gholizadeh Aghoyeh; Hossein Khalafi

2014-01-01T23:59:59.000Z

412

Sliding mode control of a dual-stator induction generator for wind energy conversion systems  

Science Journals Connector (OSTI)

This paper presents a sliding mode control (SMC) associated to the field oriented control (FOC) of a dual-stator induction generator (DSIG) based wind energy conversion systems (WECSs). The DSIG has two sets of stator three-phase windings spatially shifted by 30 electrical degrees. The study of operation of the wind turbine leads us to two essential cases: optimization of the power for wind speeds lower than the nominal speed of the turbine and limitation of the power for higher speeds. Conventional electrical grid connected WECS present interesting control demands, due to the intrinsic nonlinear characteristic of wind mills and electric generators. The SMC is a robust nonlinear algorithm which uses discontinuous control to force the system states trajectories to join some specified sliding surface, it has been widely used for its robustness to model parameter uncertainties and external disturbances, is studied. In order to verify the validity of the proposed method, a dynamic model of the proposed system has been simulated, to demonstrate its performance.

H. Amimeur; D. Aouzellag; R. Abdessemed; K. Ghedamsi

2012-01-01T23:59:59.000Z

413

Conserved quantities and dual turbulent cascades in Anti-de Sitter spacetime  

E-Print Network (OSTI)

We consider the dynamics of a spherically symmetric massless scalar field coupled to general relativity in Anti--de Sitter spacetime in the small-amplitude limit. Within the context of our previously developed two time framework (TTF) to study the leading self-gravitating effects, we demonstrate the existence of two new conserved quantities in addition to the known total energy $E$ of the modes: The particle number $N$ and Hamiltonian $H$ of our TTF system. $H$ represents the next-order contribution after $E$ to the total ADM mass $M$. Simultaneous conservation of $E$ and $N$ implies that weak turbulent processes undergo dual cascades (direct cascade of $E$ and inverse cascade of $N$ or vice versa). This partially explains the observed dynamics of 2-mode initial data. In addition, conservation of $E$ and $N$ limits the region of phase space that can be explored within the TTF approximation and in particular rules out equipartion of energy among the modes for general initial data. Finally, we discuss possible effects of conservation of $N$ and $E$ on late time dynamics.

Alex Buchel; Stephen R. Green; Luis Lehner; Steve L. Liebling

2014-12-15T23:59:59.000Z

414

Microstructure evolution of selected ferritic-martensitic steels under dual-beam irradiation  

SciTech Connect

The authors present experimental results on the microstructure evolution of dual-beam irradiated (300 keV heavy ions plus 15 keV helium ions) ferritic-martensitic steels (Manet, DIN 1.4926, F82H mod). The helium bubble morphology as well as microchemistry of the alloys are investigated by means of transmission electron microscopy and field-ion microscopy with atom probe. The alloys were irradiated to fluences up to 50 dpa and implanted with helium up to a concentration of 1 at.% at the temperatures of 723 K and 773 K. The damage and implantation rates varied from 2.5 {center_dot} 10{sup {minus}3} dpa/s to 2.5 {center_dot} 10{sup {minus}2} dpa/s and from 0.5 appm/s to 5 appm/s, respectively. Size and number density of helium bubbles is found to be rate dependent. Smaller implantation rates produce larger helium bubbles and smaller bubble number densities. Regions of local enrichment of alloy elements, typically 5 nm in size, containing chromium (up to 40 at.%), silicon, and nickel are detected. Number densities of helium bubbles and of regions of chromium enrichments are comparable and lie between 10{sup 23}/m{sup 3} and 10{sup 24}/m{sup 3}. Possible extrapolation of the present ion irradiations to spallation source and fusion reactor conditions is shortly addressed.

Wanderka, N.; Camus, E.; Wollenberger, H. [Hahn-Meitner-Inst. Berlin GmbH (Germany)

1997-11-01T23:59:59.000Z

415

Method to improve cancerous lesion detection sensitivity in a dedicated dual-head scintimammography system  

DOE Patents (OSTI)

An improved method for enhancing the contrast between background and lesion areas of a breast undergoing dual-head scintimammographic examination comprising: 1) acquiring a pair of digital images from a pair of small FOV or mini gamma cameras compressing the breast under examination from opposing sides; 2) inverting one of the pair of images to align or co-register with the other of the images to obtain co-registered pixel values; 3) normalizing the pair of images pixel-by-pixel by dividing pixel values from each of the two acquired images and the co-registered image by the average count per pixel in the entire breast area of the corresponding detector; and 4) multiplying the number of counts in each pixel by the value obtained in step 3 to produce a normalization enhanced two dimensional contrast map. This enhanced (increased contrast) contrast map enhances the visibility of minor local increases (uptakes) of activity over the background and therefore improves lesion detection sensitivity, especially of small lesions.

Kieper, Douglas Arthur (Newport News, VA); Majewski, Stanislaw (Yorktown, VA); Welch, Benjamin L. (Hampton, VA)

2008-10-28T23:59:59.000Z

416

Studies on dual fuel engine performance and exhaust emission analysis by response surface methodology  

Science Journals Connector (OSTI)

In this present study a five factor three level Box-Behnken response surface design was used to study the effect of five independent variables such as diesel (40%–100%) ethanol (0%-30%) pongamia oil methyl ester (POME) (0%–30%) compressed natural gas (CNG) (0%–20%) and load of the engine (0%–100%) on the performance (brake thermal efficiency brake specific fuel consumption and exhaust gas temperature) and emission characteristics (carbon mono-oxide (CO) carbon dioxides (CO2) unburnt hydrocarbon oxides of nitrogen (NOX) and smoke) of a single cylinder four stroke water cooled diesel engine converted to dual fuel system. It was operated with either diesel fuel or blend with CNG using an electronically controlled solenoid actuated valve mechanism. The experimental results showed that all the process variables have significant effect on the engine performance. The emission characteristics (CO CO2 NOX and Smoke) were significantly lower than the diesel fuel emissions. From the experimental results second order polynomial models were developed to predict the response variables. The optimal conditions were determined and it was found to be: Diesel 70% Ethanol 15% POME 15% CNG 10% and load 50% respectively with a desirability value of 0.894.

R. Senthilraja; V. Sivakumar; J. Prakash Maran

2014-01-01T23:59:59.000Z

417

Dual-band infrared imaging for quantitative corrosion detection in aging aircraft  

SciTech Connect

Aircraft skin thickness-loss from corrosion has been measured using dual-band infrared (DBIR) imaging on a flash-heated Boeing 737 fuselage structure. The authors mapped surface temperature differences of 0.2 to 0.6 C for 5 to 14 % thickness losses within corroded lap splices at 0.4 seconds after the heat flash. The procedure mapped surface temperature differences at sites without surface-emissivity clutter (from dirt, dents, tape, markings, ink, sealants, uneven paint, paint stripper, exposed metal and roughness variations). They established the correlation of percent thickness loss with surface temperature rise using a partially corroded F-18 wing box and several aluminum panels which had thickness losses from milled flat-bottom holes. The authors mapped the lap splice composite thermal inertia, (k{rho}c){sup 1/2}, which characterized shallow skin defects within the lap splice at early times (<0.3 s) and deeper skin defects within the lap splice at late times (>0.4 s). Corrosion invaded the inside of the Boeing 737 lap splice, beneath the galley and the latrine, where they observed ``pillowing`` from volume build-up of corrosion by-products.

Del Grande, N.K. [Lawrence Livermore National Lab., CA (United States)

1993-12-31T23:59:59.000Z

418

Dual-band infrared imaging for quantitative corrosion detection in aging aircraft  

SciTech Connect

Aircraft skin thickness-loss from corrosion has been measured using dual-band infrared (DBIR) imaging on a flash-heated Boeing 737 fuselage structure. We mapped surface temperature differences of 0.2 to 0.6 {degrees}C for 5 to 14% thickness losses within corroded lap splices at 0.4 seconds after the heat flash. Our procedure mapped surface temperature differences at sites without surface-emissivity clutter (from dirt, dents, tape, markings, ink, sealants, uneven paint, paint stripper, exposed metal and roughness variations). We established the correlation of percent thickness loss with surface temperature rise using a partially corroded F-18 wing box and several aluminum panels which had thickness losses from milled flat-bottom holes. We mapped the lap splice composite thermal inertia, (kpc){sup {1/2}}, which characterized shallow skin defects within the lap splice at early times (<0.3 s) and deeper skin defects within the lap splice at late times (>0.4 s). Corrosion invaded the inside of the Boeing 737 lap splice, beneath the galley and the latrine, where we observed ``pillowing`` from volume build-up of corrosion by-products.

Del Grande, N.K.

1993-11-01T23:59:59.000Z

419

Imaging system for cardiac planar imaging using a dedicated dual-head gamma camera  

DOE Patents (OSTI)

A cardiac imaging system employing dual gamma imaging heads co-registered with one another to provide two dynamic simultaneous views of the heart sector of a patient torso. A first gamma imaging head is positioned in a first orientation with respect to the heart sector and a second gamma imaging head is positioned in a second orientation with respect to the heart sector. An adjustment arrangement is capable of adjusting the distance between the separate imaging heads and the angle between the heads. With the angle between the imaging heads set to 180 degrees and operating in a range of 140-159 keV and at a rate of up to 500kHz, the imaging heads are co-registered to produce simultaneous dynamic recording of two stereotactic views of the heart. The use of co-registered imaging heads maximizes the uniformity of detection sensitivity of blood flow in and around the heart over the whole heart volume and minimizes radiation absorption effects. A normalization/image fusion technique is implemented pixel-by-corresponding pixel to increase signal for any cardiac region viewed in two images obtained from the two opposed detector heads for the same time bin. The imaging system is capable of producing enhanced first pass studies, bloodpool studies including planar, gated and non-gated EKG studies, planar EKG perfusion studies, and planar hot spot imaging.

Majewski, Stanislaw (Morgantown, VA); Umeno, Marc M. (Woodinville, WA)

2011-09-13T23:59:59.000Z

420

Mapping hidden aircraft defects with dual-band infrared computed tomography  

SciTech Connect

Infrared computed tomography (IRCT) is a promising, non-contact, nondestructive evaluation tool used to inspect the mechanical integrity of large structures. We describe on-site, proof-of-principle demonstrations of IRCt to inspect defective metallic and composite structures. The IRCT system captures time sequences of heat-stimulated, dual-band infrared (DBIR) thermal maps for flash-heated and naturally-heated targets. Our VIEW algorithms produce co-registered thermal, thermal inertia, and thermal-timegram maps from which we quantify the percent metal-loss corrosion damage for airframes and the defect sites, depths, and host-material physical properties for composite structures. The IRCT method clarifies the type of defect, e.g., corrosion, fabrication, foreign-material insert, delamination, unbond, void, and quantifies the amount of damage from the defect, e.g., the percent metal-loss from corrosion in metal structures, the depth, thickness, and areal extent of heat damage in multi-layered composite materials. Potential long-term benefits of IRCT technology are in-service monitoring of incipient corrosion damage, to avoid catastrophic failure and production-monitoring of cure states for composite materials.

Del Grande, N.K.; Durbin, P.F.

1995-04-03T23:59:59.000Z

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421

Solar photocatalytic hydrogen production from water using a dual bed photosystem. Task 2 report; Annual report  

SciTech Connect

This work is an investigation into the use of photocatalytic particles in a dual bed configuration, so as to effect the solar-driven decomposition of water to its constituent elements, particularly hydrogen. The system envisioned would consist of two modules, each consisting of a shallow, flat, sealed container, in which micron-sized photocatalytic particles are immobilized. An aqueous solution containing a redox mediator is pumped between the two chambers. Different photoparticles and catalysts are chosen for their respective modules so as to effect oxidative water-splitting in one vessel to evolve oxygen gas, and reductive water-splitting in the other to evolve hydrogen. This is a direct photoconversion scheme that breaks down the energetic requirement for water decomposition into a 2-photon process, and enables separate production of hydrogen and oxygen. Titanium dioxide, TiO{sub 2}, and indium phosphide, InP, were employed as photoparticles in the O{sub 2}- and H{sub 2}-evolving beds, respectively. Platinum catalysts were evaluated to prompt H{sub 2}-evolution. Calculations on the energy band structure of free and immobilized particles provided guidance as to how the microstructure of the particles should be configured. A series of redox mediators, spanning a range of redox potentials, were tested. While many electron donors facilitated H{sub 2}-evolution, only the most oxidizing ones enabled O{sub 2}-evolution. A single redox couple, capable of charge exchange in both modules, is desirable to avoid system design complexity.

Linkous, C.A.; McKaige, G.T.; Slattery, D.K.; Ouellette, A.J.A.; Austin, B.C.N.

1995-12-01T23:59:59.000Z

422

Simulation and experimental verification of a hydrodynamic model for a dual fluidized Bed gasifier  

Science Journals Connector (OSTI)

Abstract We propose a revised 2-D energy-minimization multi-scale (EMMS) model based on a two-fluid model to perform the hydrodynamic character analysis of a pilot-scale full-loop dual fluidized bed gasifier (DFBG), which consists of a riser, a cyclone with a down-comer, a bubbling fluidized bed (BFB), and a loop-seal. The EMMS model is used to analyze the interaction force between the gas and solid phases in the DFBG. For comparison, O'Brien & Syamlal's drag heterogeneous force coefficient correction is also analyzed. The instantaneous particle profiles are described by the calculated results. The local and overall flow characteristics are determined by the solids concentration under different fluidization conditions. The effects of the gas velocities in the riser and the recycle gas velocities in the U loop seal on the axial solids concentration and solids circulation profiles, as well as the flow heterogeneity in sub-zones of the riser are investigated. The numerical results are in good agreement with the experimental data, indicating that the EMMS model is appropriate to simulate the heterogeneous gas–solids two-phase flow in DFBG.

Xueyao Wang; Jing Lei; Xiang Xu; Zhengzhong Ma; Yunhan Xiao

2014-01-01T23:59:59.000Z

423

Conserved quantities and dual turbulent cascades in Anti-de Sitter spacetime  

E-Print Network (OSTI)

We consider the dynamics of a spherically symmetric massless scalar field coupled to general relativity in Anti--de Sitter spacetime in the small-amplitude limit. Within the context of our previously developed two time framework (TTF) to study the leading self-gravitating effects, we demonstrate the existence of two new conserved quantities in addition to the known total energy $E$ of the modes: The particle number $N$ and Hamiltonian $H$ of our TTF system. Simultaneous conservation of $E$ and $N$ implies that weak turbulent processes undergo dual cascades (direct cascade of $E$ and inverse cascade of $N$ or vice versa). This partially explains the observed dynamics of 2-mode initial data. In addition, conservation of $E$ and $N$ limits the region of phase space that can be explored within the TTF approximation and in particular rules out equipartion of energy among the modes for general initial data. Finally, we discuss possible effects of conservation of $N$ and $E$ on late time dynamics.

Alex Buchel; Stephen R. Green; Luis Lehner; Steven L. Liebling

2015-02-17T23:59:59.000Z

424

Structural, optical and electrical properties of WOxNy filmsdeposited by reactive dual magnetron sputtering  

SciTech Connect

Thin films of tungsten oxynitride were prepared by dual magnetron sputtering of tungsten using argon/oxygen/nitrogen gas mixtures with various nitrogen/oxygen ratios. The presence of even small amounts of oxygen had a great effect not only on the composition but on the structure of WOxNy films, as shown by Rutherford backscattering and x-ray diffraction, respectively. Significant incorporation of nitrogen occurred only when the nitrogen partial pressure exceeded 89 percent of the total reactive gas pressure. Sharp changes in the stoichiometry, deposition rate, room temperature resistivity, electrical activation energy and optical band gap were observed when the nitrogen/oxygen ratio was high.The deposition rate increased from 0.31 to 0.89 nm/s, the room temperature resistivity decreased from 1.65 x 108 to 1.82 x 10-2 ?cm, the electrical activation energy decreased from 0.97 to 0.067 eV, and the optical band gap decreased from 3.19 to 2.94 eV upon nitrogen incorporation into the films. WOxNy films were highly transparent as long as the nitrogen incorporation was low, and were brownish (absorbing) and partially reflecting as nitrogen incorporation became significant.

Mohamed, Sodky H.; Anders, Andre

2006-06-05T23:59:59.000Z

425

Performance of a quantum key distribution protocol with dual-rail displaced photon states  

SciTech Connect

We propose a scheme for a quantum key distribution (QKD) protocol with dual-rail displaced photon states. Displaced single-photon states with different amplitudes carry bit values of code that may be extracted, while coherent states carry nothing and only provide an inconclusive outcome. A real resource of single photons is used, involving imperfections associated with experimental technique that result in a photon state with an admixture of the vacuum state. The protocol is robust against the loss of a single photon and the inefficiency of the detectors. Pulses with large amplitudes, unlike the conventional QKD relying on faint laser pulses, are used that may approximate it to standard telecommunication and may show resistance to eaves-dropping even in settings with high attenuation. Information leakage to the eavesdropper is determined from comparison of the output distributions of the outcomes with ideal ones that are defined by two additional parameters accessible to only those send the pulses. Robustness to some possible eavesdropping attacks is shown.

Podoshvedov, S. A., E-mail: sap@kias.re.k [Korea Institute for Advanced Study, School of Computational Sciences (Korea, Republic of)

2010-04-15T23:59:59.000Z

426

Application Of Ti-Based Self-Formation Barrier Layers To Cu Dual-Damascene Interconnects  

SciTech Connect

Cu interconnects have been used extensively in ULSI devices. However, large resistance-capacitance delay and poor device reliability have been critical issues as the device feature size has reduced to nanometer scale. In order to achieve low resistance and high reliability of Cu interconnects, we have applied a thin Ti-based self-formed barrier (SFB) using Cu(Ti) alloy seed to 45nm-node dual damascene interconnects and evaluated its performance. The line resistance and via resistance decreased significantly, compared with those of conventional Ta/TaN barriers. The stress migration performance was also drastically improved using the SFB process. A performance of time dependent dielectric breakdown revealed superior endurance. These results suggest that the Ti-based SFB process is one of the most promising candidates for advanced Cu interconnects. TEM and X-ray photoelectron spectroscopy observations for characterization of the Ti-based SFB structure were also performed. The Ti-based SFB consisted of mainly amorphous Ti oxides. Amorphous or crystalline Ti compounds such as TiC, TiN, and TiSi formed beneath Cu alloy films, and the formation varied with dielectric.

Ito, Kazuhiro; Kohama, Kazuyuki [Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501 (Japan); Ohmori, Kazuyuki; Mori, Kenichi; Maekawa, Kazuyoshi; Asai, Koyu [Process Technology Div., Renesas Electronics Corporation, Hitachinaka, Ibaraki 312-8504 (Japan); Murakami, Masanori [The Ritsumeikan Trust, Nakagyo-ku, Kyoto 604-8520 (Japan)

2010-11-24T23:59:59.000Z

427

450 mm dual frequency capacitively coupled plasma sources: Conventional, graded, and segmented electrodes  

SciTech Connect

Wafer diameters for microelectronics fabrication will soon transition from 300 to 450 mm at a time when excitation frequencies for capacitively coupled plasmas (CCPs) are increasing to 200 MHz or higher. Already for 300 mm tools, there is evidence that wave behavior (i.e., propagation, constructive, and destructive interference) affects the uniformity of processing. The increase in diameter to 450 mm is likely to exacerbate these effects, perhaps requiring nontraditional tool designs. This is particularly important in dual frequency (DF) CCP tools in which there are potential interactions between frequencies. In this paper, results from a two-dimensional computational investigation of Ar plasma properties in a 450 mm DF-CCP reactor, incorporating a full-wave solution of Maxwell's equations, are discussed. As in 300 mm DF-CCP reactors, the electron density collapses toward the center of the reactor with increasing high frequency (HF), however, with more pronounced finite wavelength effects. Graded conductivity electrodes with multilayer of dielectrics are computationally demonstrated as a possible means to suppress wave effects thereby increasing plasma uniformity. Segmentation of the HF electrode also improves the plasma uniformity by making the electrical distance between the feeds and the sheath edges as uniform as possible.

Yang Yang [Department of Electrical and Computer Engineering, Iowa State University, Ames, Iowa 50011 (United States); Kushner, Mark J. [Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Avenue, Ann Arbor, Michigan 48109-2122 (United States)

2010-12-01T23:59:59.000Z

428

ABSTRACT: Upscaling Fracture Properties in Support of Dual-permeability Simulations  

SciTech Connect

Rainier Mesa (RM) is a tuffaceous, high-elevation plateau on the Nevada Test Site (NTS) that has been subjected to numerous nuclear tests between 1957 and 1992. Unlike other tests on the NTS located within or just above the saturated zone, tests at the RM T-tunnel complex were conducted within a variably saturated sequence of bedded and non-welded vitric and zeolitized tuff units, located approximately 500 m above the regional groundwater flow system. The low permeability and high porosity of the underlying zeolitized tuff units suggest the downward transport of radionuclides released from these tests are minimal through the tuff matrix. However, numerous faults observed to discharge water into tunnel drifts may serve as preferential pathways for radionuclide migration. Data collected from tunnel drifts indicate that faulting within the zeolitized tuff units is sparse with fractal clustering, and that connectivity between adjacent fault clusters is often weak to non-existent. The sparse fault density at RM, in conjunction with the extreme variability in the spatial distribution of faults, poses challenges not readily addressed by existing upscaling methods that upscale fracture properties as equivalent grid tensors. The unique fault statistics at RM has led to the development of a fracture continuum method designed to faithfully preserve flow and transport properties of the sparse fault networks. This method is based on selective mapping and upscaling of fault hydraulic and transport properties onto a continuum grid in support of dual-permeability simulations. Comparisons of global flow and random walk particle breakthrough between two-dimensional discrete fracture network and fracture continuum simulations demonstrate the utility of this method.

Rishi Parashar; Donald M. Reeves

2008-09-15T23:59:59.000Z

429

Isomer Tagging with a Dual Multi-Wire Proportional Counter and a Differential Plunger  

SciTech Connect

This report details the status of an experimental research programme which has studied isomeric states in the mass 130-160 region of the nuclear chart. Several new isomers have been established and characterised near the proton drip line using a recoil isomer tagging technique at the University of Jyvaeskylae, Finland. The latest experiments have been performed with a modified setup where the standard GREAT focal-plane double-sided silicon-strip detector was changed to a dual multi-wire proportional-counter arrangement. This new setup has improved capability for short-lived isomer studies where large focal-plane rates can be tolerated. The results of key recent experiments for nuclei situated above ({sup 153}Yb, {sup 152}Tm) and below ({sup 144}Ho, {sup 142}Tb) the N = 82 shell gap were presented. These studies have charted the evolution of isomeric states across the neutron shell from K-Isomers at N = 74, to shape isomers at N = 77 and shell-model isomers at N = 82, 83. The excitation energies for some of the lowest-lying excited states in these isomeric nuclei show behaviour which is characteristic of an X(5) symmetry falling midway between the limits expected for pure vibrational and rotational behaviour. The future prospects for studies of these nuclei were discussed using an isomer-tagged differential-plunger setup. This technique will be capable of establishing the deformation of the states above the isomers and will aid in determining whether their behaviour is indeed well described by the X(5) symmetry limit.

Cullen, D. M.; Mason, P. J. R.; Khan, S.; Kishada, A. M.; Varley, B. J. [School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom); Rigby, S. V. [School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom); Oliver Lodge, Lab., University of Liverpool, Liverpool, L69 7ZE (United Kingdom); Scholey, C.; Greenlees, P.; Rahkila, P.; Jones, P. M.; Julin, R.; Juutinen, S.; Leino, M.; Leppaenen, A. P.; Nyman, M.; Uusitalo, J. [Department of Physics, University of Jyvaeskylae, Jyvaeskylae, FIN-40014 (Finland); Grahn, T.; Pakarinen, J. [Department of Physics, University of Jyvaeskylae, Jyvaeskylae, FIN-40014 (Finland); Oliver Lodge, Lab., University of Liverpool, Liverpool, L69 7ZE (United Kingdom); Nieminen, P. [Department of Physics, University of Jyvaeskylae, Jyvaeskylae, FIN-40014 (Finland); Department of Nuclear Physics, Australian National University, Canberra, ACT 0200 (Australia)

2008-05-12T23:59:59.000Z

430

Extended Constant Power Speed Range of the Brushless DC Motor Through Dual Mode Inverter Control  

SciTech Connect

The trapezoidal back electromotive force (emf) brushless direct current (dc) motor (BDCM) with surface-mounted magnets has high-power density and efficiency especially when rare-earth magnet materials are used. Traction applications, such as electric vehicles, could benefit significantly from the use of such motors. Unfortunately, a practical means for driving the motor over a constant power speed ratio (CPSR) of 5:1 or more has not yet been developed. A key feature of these motors is that they have low internal inductance. The phase advance method is effective in controlling the motor power over such a speed range, but the current at high speed may be several times greater than that required at the base speed. The increase in current during high-speed operation is due to the low motor inductance and the action of the bypass diodes of the inverter. The use of such a control would require increased current rating of the inverter semiconductors and additional cooling for the inverter, where the conduction losses increase proportionally with current, and especially for the motor, where the losses increase with the square of the current. The high current problems of phase advance can be mitigated by adding series inductance; however, this reduces power density, requires significant increase in supply voltage, and leaves the CPSR performance of the system highly sensitive to variations in the available voltage. A new inverter topology and control scheme has been developed that can drive low-inductance BDCMs over the CPSR that would be required in electric vehicle applications. This new controller is called the dual-mode inverter control (DMIC). It is shown that the BDCM has an infinite CPSR when it is driven by the DMIC.

Lawler, J.S.

2000-06-23T23:59:59.000Z

431

Two-phase flow structure in dual discharges - Stereo PIV measurements  

SciTech Connect

The discharge of two-phase flow from a stratified region through single or multiple branches is an important process in many industrial applications including the pumping of fluid from storage tanks, shell-and-tube heat exchangers, and the fluid flow through header to the cooling channels, feeder's tube, of nuclear reactors during loss-of-coolant accidents (LOCA). Knowledge of the flow phenomena involved along with the quality and mass flow rate of the discharging stream(s) is necessary to adequately predict the different phenomena associated with the process. Stereoscopic Particle Image Velocimetry (SPIV) was used to provide detailed measurements of the flow patterns involving distributions of mean velocity, vorticity field, and flow structure. The experimental investigation was carried out to simulate two-phase discharge from a stratified region through branches located on a quarter-circular wall configuration exposed to a stratified gas-liquid environment. The quarter-circular test section is in close dimensional resemblance with that of a CANDU header-feeder system, with branches mounted at orientation angles of zero, 45 and 90 degrees from the horizontal. The experimental data for the phase development (mean velocity, flow structure, etc.) was collected during dual discharge through the horizontal branch and the 45 or 90 branch from an air-water stratified region over two selected Froude numbers in the horizontal branch while maintaining the Froude number in the other branch constant. These measurements were used to describe the effect of outlet flow conditions on phase redistribution in headers and understand the entrainment phenomena. (author)

Saleh, W.; Bowden, R.C.; Hassan, I.G.; Kadem, L. [Department of Mechanical and Industrial Engineering, Concordia University Montreal, QC (Canada)

2010-11-15T23:59:59.000Z

432

Well testing model for multi-fractured horizontal well for shale gas reservoirs with consideration of dual diffusion in matrix  

Science Journals Connector (OSTI)

Abstract Shale gas reservoir is typical unconventional reservoir, it's necessary to take advantage of multi-stage fractured horizontal well so as to develop those kinds of reservoirs, which can form high conductivity hydraulic fractures and activate natural fractures. Due to the existence of concentration gap between matrix and fractures, desorption gas can simultaneously diffuse into the natural fractures and hydraulic fractures. This process can be called dual diffusion. Based on the triple-porosity cubic model, this paper establishes a new well testing model of multi-stage fractured horizontal well in shale gas reservoir with consideration of the unique mechanisms of desorption and dual diffusion in matrix. Laplace transformation is employed to solve this new model. The pseudo pressure transient responses are inverted into real time space with stehfest numerical inversion algorithm. Type curves are plotted, and different flow regimes in shale gas reservoirs are identified and the effects of relevant parameters are analyzed as well. Considering the mechanism of dual diffusion in matrix, the flow can be divided into five regimes: early linear flow; pseudo-steady state inter-porosity flow; the diffusion from matrix into micro-fractures; the diffusion from matrix into hydraulic fractures and boundary-dominated flow. There are large distinctions of pressure response between pseudo steady state diffusion and unsteady state diffusion under different value of pore volume ratio. It's similar to the feature of pseudo-steady state inter-porosity flow, diffusion coefficient and Langmuir parameters reflect the characters of pseudo-steady state diffusion. The numbers of stage of hydraulic fractures have certain impact on the shape factor of matrix and the inter-porosity coefficient. This new model is validated compared with some existing models. Finally, coupled with an application, this mew model can be approximately reliable and make some more precise productivity prediction.

Leng Tian; Cong Xiao; Mingjin Liu; Daihong Gu; Guangyu Song; Helong Cao; Xianglong Li

2014-01-01T23:59:59.000Z

433

Dual-chamber plasma deposition of A-Si:H solar cells at high rates using disilane  

SciTech Connect

The use of a separated chamber deposition system for the fabrication of a-Si:H solar cells from disilane at high deposition rates results in a substantial improvement in short circuit current compared to that obtained from a single-chamber system. The spectral responses of cells fabricated in the dual-chamber mode are compared to those made in the single-chamber mode. The results are interpreted by assuming that the rate of removal of boron contaminants from the chamber is independent of deposition rate.

Rajeswaran, G.; Vanier, P.E.; Corderman, R.R.; Kampas, F.J.

1985-01-01T23:59:59.000Z

434

Co-gasification of Plastics and Biomass in a Dual Fluidized-Bed Steam Gasifier: Possible Interactions of Fuels  

Science Journals Connector (OSTI)

Co-gasification of Plastics and Biomass in a Dual Fluidized-Bed Steam Gasifier: Possible Interactions of Fuels ... Temperatures of up to 1000 °C were measured with high-temperature thermocouples, while high-quality flow meters (Krohne) were employed for the adjustment of process media inputs, such as the fluidization agents, steam and air. ... A GC–MS device (gas chromatograph with a mass spectrometer) was used to measure the content of 50 different tar species of medium molecular weight in the product gas. ...

Veronika Wilk; Hermann Hofbauer

2013-04-25T23:59:59.000Z

435

Measurement of the ?-ray energy resolution function of EJ301 liquid scintillator using a dual channel ADC  

Science Journals Connector (OSTI)

Abstract A comparison of three different methods for the energy calibration of liquid scintillators using ?-ray sources using only a delay unit and a dual channel ADC is presented. Single Compton edge measurements combined with MCNP simulations of the pulse height spectra are compared with the results obtained using Compton coincidence methods. Good agreement between the three methods is found. Measurements from the three different methods are then combined to provide the best estimate of the energy resolution function. The technique here presented could be easily used in laboratory courses as high performing \\{ADCs\\} become more common and affordable.

M. Cecconello; M. Donato; C. Marini-Bettolo; S. Conroy; S. Sangaroon; G. Ericsson

2014-01-01T23:59:59.000Z

436

Conceptual design and testing strategy of a dual functional lithium–lead test blanket module in ITER and EAST  

Science Journals Connector (OSTI)

A dual functional lithium–lead (DFLL) test blanket module (TBM) concept has been proposed for testing in the International Thermonuclear Experimental Reactor (ITER) and the Experimental Advanced Superconducting Tokamak (EAST) in China to demonstrate the technologies of the liquid lithium–lead breeder blankets with emphasis on the balance between the risks and the potential attractiveness of blanket technology development. The design of DFLL-TBM concept has the flexibility of testing both the helium-cooled quasi-static lithium–lead (SLL) blanket concept and the He/PbLi dual-cooled lithium–lead (DLL) blanket concept. This paper presents an effective testing strategy proposed to achieve the testing target of SLL and DLL DEMO blankets relevant conditions, which includes three parts: materials R&D and small-scale out-of-pile mockups testing in loops, middle-scale TBMs pre-testing in EAST and full-scale consecutive TBMs testing corresponding to different operation phases of ITER during the first 10 years. The design of the DFLL-TBM concept and the testing strategy ability to test TBMs for both blanket concepts in sequence and or in parallel for both ITER and EAST are discussed.

Y. Wu; the FDS Team

2007-01-01T23:59:59.000Z

437

GaInP/GaAs dual junction solar cells on Ge/Si epitaxial templates Melissa J. Archer,1,a  

E-Print Network (OSTI)

GaInP/GaAs dual junction solar cells on Ge/Si epitaxial templates Melissa J. Archer,1,a Daniel C Richard R. King,2 and Harry A. Atwater1 1 California Institute of Technology, Pasadena, California 91125, USA 2 Spectrolab, Inc., Sylmar, California 91342, USA 3 Aonex Technologies, Pasadena, California 91106

Atwater, Harry

438

Bioprinting cell-laden matrigel for radioprotection study of liver by pro-drug conversion in a dual-tissue microfluidic chip  

E-Print Network (OSTI)

-tissue microfluidic chip This article has been downloaded from IOPscience. Please scroll down to see the full text for radioprotection study of liver by pro-drug conversion in a dual-tissue microfluidic chip J E Snyder1, Q Hamid1, C of this paper is to introduce a novel cell printing and microfluidic system to serve as a portable ground model

Sun, Wei

439

Gauge-independent "Abelian" and magnetic-monopole dominance, and the dual Meissner effect in lattice $SU(2)$ Yang-Mills theory  

E-Print Network (OSTI)

In the $SU(2)$ Yang-Mills theory on the four-dimensional Euclidean lattice, we confirm the gauge-independent "Abelian" dominance (or the restricted field dominance) and gauge-independent magnetic-monopole dominance in the string tension of the linear potential extracted from the Wilson loop in the fundamental representation. The dual Meissner effect is observed by demonstrating the squeezing of the chromoelectric field flux connecting a pair of quark and antiquark. In addition, the circular magnetic-monopole current is induced around the chromoelectric flux. The type of the dual superconductivity is also determined by fitting the result with the dual Ginzburg-Landau model. Thus the dual superconductor picture for quark confinement is established in a gauge-independent manner. These results are obtained based on a reformulation of the lattice Yang-Mills theory based on the change of variables a la Cho-Duan-Ge-Faddeev-Niemi combined with a non-Abelian Stokes theorem for the Wilson loop operator. We give a new procedure (called the reduction) for obtaining the color direction field which plays the central role in this reformulation.

Seikou Kato; Kei-Ichi Kondo; Akihiro Shibata

2014-07-10T23:59:59.000Z

440

Embedded Model Predictive Control on a PLC Using a Primal-Dual First-Order Method for a Subsea Separation Process  

E-Print Network (OSTI)

Embedded Model Predictive Control on a PLC Using a Primal-Dual First-Order Method for a Subsea. Eikrem3 Abstract-- The results of a PLC implementation of embedded Model Predictive Control (MPC to underline its potential. The embedded MPC was implemented on the ABB AC500 PLC, and its performance

Johansen, Tor Arne

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441

PHYSICS/COMPUTER SCIENCEPHYSICS/COMPUTER SCIENCEPHYSICS/COMPUTER SCIENCE This major is intended for students with dual interests in physics and computer  

E-Print Network (OSTI)

PHYSICS/COMPUTER SCIENCEPHYSICS/COMPUTER SCIENCEPHYSICS/COMPUTER SCIENCE This major is intended for students with dual interests in physics and computer science who wish to complete the essential courses for both majors within four years. It prepares students for a career in a computer-related field and

Krylov, Anna I.

442

Cellular Dynamics Visualized in Live Cells in Vitro and in Vivo by Differential Dual-Color Nuclear-Cytoplasmic Fluorescent-Protein Expression  

Science Journals Connector (OSTI)

...Differential Dual-Color Nuclear-Cytoplasmic Fluorescent-Protein...Kanazawa, Ishikawa, Japan; and 4 The Salk Institute...that enables real-time nuclear-cytoplasmic dynamics...fluorescence microscopy. Nuclear Cytoplasmic Dynamics...VT) with a 50-W power supply. Images were...

Norio Yamamoto; Ping Jiang; Meng Yang; Mingxu Xu; Kensuke Yamauchi; Hiroyuki Tsuchiya; Katsuro Tomita; Geoffrey M. Wahl; Abdool R. Moossa; and Robert M. Hoffman

2004-06-15T23:59:59.000Z

443

Dual Emission of 4-(1H-Pyrrol-1-yl)benzonitrile Clusters with Acetonitrile in a Supersonic Jet and Its Absence in Phenylpyrrole Clusters  

E-Print Network (OSTI)

Dual Emission of 4-(1H-Pyrrol-1-yl)benzonitrile Clusters with Acetonitrile in a Supersonic Jet with solution spectra of PBN in acetonitrile. The CT emission is observed only when mass spectra obtained upon four acetonitrile molecules are attached to a PBN molecule. In contrast, only a single emission band

Haas, Yehuda

444

Assessment of Delaware and Groningen effects on dual-laterolog measurements with a self-adaptive hp finite-element method  

E-Print Network (OSTI)

Assessment of Delaware and Groningen effects on dual-laterolog measurements with a self-adaptive hp and Groningen effects. Both effects give rise to abnormally high readings of DLL measurements under extreme laterolog mea- surements, generating the so-called Groningen effect. INTRODUCTION The electrical resistivity

Torres-Verdín, Carlos

445

Estimates of the image quality and the radiation dose for head and abdomen phantom image acquisition by using dual-energy CT  

Science Journals Connector (OSTI)

Using dual-energy computed tomography (CT) scans, we obtained ... data set by using low- and high-energy scans (usually 80 and 140 kV, ... and the abdomen examinations were performed using single-energy (120 kV) ...

Dae-Hong Kim; Hee-Joung Kim; Chang-Lae Lee…

2012-04-01T23:59:59.000Z

446

John C. Baez, November 4, 2004 The concept of `dual vector space' has a massive generalization in terms of category theory. It goes  

E-Print Network (OSTI)

for the creation and annihilation of particle/antiparticle pairs! In this notation, the zig-zag identities simply is that we can prove that any two duals of the same object are isomorphic in a god-given way: 2. Suppose x

Baez, John

447

Changes in Bone Mineral, Lean Body Mass and Fat Content as Measured by Dual Energy X-ray Absorptiometry: A Longitudinal Study  

Science Journals Connector (OSTI)

Bone mineral density (BMD) and soft tissue composition were measured by dual energy X-ray absorptiometry (DXA) 3–4 years apart in 273 men and women aged 23–90. We found different rates of BMD loss in differen...

M. K. Karlsson; K. J. Obrant; B. E. Nilsson; O. Johnell

2000-02-01T23:59:59.000Z

448

A high-resolution characteristics-based implicit dual time-stepping VOF method for free surface flow simulation on unstructured grids  

Science Journals Connector (OSTI)

In this paper, a new unstructured-grid/finite volume incompressible Navier-Stokes solver, based on a high-order characteristics-based method, the artificial compressibility method, and a matrix-free implicit dual time-stepping scheme, has been developed ...

Yong Zhao; Hsiang Hui Tan; Baili Zhang

2002-11-01T23:59:59.000Z

449

A HYBRID DUAL-CORE RECONFIGURABLE PROCESSOR FOR EBCOT TIER-1 ENCODER IN JPEG2000 ON NEXT GENERATION OF DIGITAL CAMERAS  

E-Print Network (OSTI)

been optimized as well, with a shared Dual-Port RAM (DPRAM) acting as the communication intermediate reconfigurability. However, when targeting applications for handheld devices, the low power consumption and high integration become essential issues. For these cases, FPGA implementations have an impact on energy

Arslan, Tughrul

450

PVDF/Nanosilica Dual-Layer Hollow Fibers with Enhanced Selectivity and Flux as Novel Membranes for Ethanol Recovery  

Science Journals Connector (OSTI)

Therefore, the objective of this work is to design PVDF/nanosilica dual-layer hollow fiber membranes molecularly with an enhanced selectivity (ethanol–water separation factor up to 29) and a high total flux for ethanol recovery via tuning membrane morphology and controlling the operating downstream pressure employing the modified pore-flow concept. ... The upstream pressure was at atmospheric pressure (101.325 ... Figure 2. A comparison of experimental data on pervaporation of pure water system as a function of downstream pressures using different permeate collecting approaches: (?) unheated permeate line with partial condensates in the permeate line, which was further recovered by applying a high vacuum and (?) heated permeate line at 35 °C with no condensation observed along the permeate line. ...

Panu Sukitpaneenit; Tai-Shung Chung

2011-12-09T23:59:59.000Z

451

A Primal-Dual Proximal Algorithm for Sparse Template-Based Adaptive Filtering: Application to Seismic Multiple Removal  

E-Print Network (OSTI)

Unveiling meaningful geophysical information from seismic data requires to deal with both random and structured "noises". As their amplitude may be greater than signals of interest (primaries), additional prior information is especially important in performing efficient signal separation. We address here the problem of multiple reflections, caused by wave-field bouncing between layers. Since only approximate models of these phenomena are available, we propose a flexible framework for time-varying adaptive filtering of seismic signals, using sparse representations, based on inaccurate templates. We recast the joint estimation of adaptive filters and primaries in a new convex variational formulation. This approach allows us to incorporate plausible knowledge about noise statistics, data sparsity and slow filter variation in parsimony-promoting wavelet frames. The designed primal-dual algorithm solves a constrained minimization problem that alleviates standard regularization issues in finding hyperparameters. Th...

Pham, Mai Quyen; Chaux, Caroline; Pesquet, Jean-Christophe

2014-01-01T23:59:59.000Z

452

Spectroscopy of the methane {nu}{sub 3} band with an accurate midinfrared coherent dual-comb spectrometer  

SciTech Connect

We demonstrate a high-accuracy dual-comb spectrometer centered at 3.4 {mu}m. The amplitude and phase spectra of the P, Q, and partial R branches of the methane {nu}{sub 3} band are measured at 25 to 100 MHz point spacing with resolution under 10 kHz and a signal-to-noise ratio of up to 3500. A fit of the absorbance and phase spectra yields the center frequency of 132 rovibrational lines. The systematic uncertainty is estimated to be 300 kHz, which is 10{sup -3} of the Doppler width and a 10-fold improvement over Fourier transform spectroscopy. These data quantify the accuracy and resolution achievable with direct comb spectroscopy in the midinfrared.

Baumann, E.; Giorgetta, F. R.; Swann, W. C.; Zolot, A. M.; Coddington, I.; Newbury, N. R. [National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305 (United States)

2011-12-15T23:59:59.000Z

453

Dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources  

DOE Patents (OSTI)

A dual isotope notch observer for isotope identification, assay and imaging with mono-energetic gamma-ray sources includes a detector arrangement consists of three detectors downstream from the object under observation. The latter detector, which operates as a beam monitor, is an integrating detector that monitors the total beam power arriving at its surface. The first detector and the middle detector each include an integrating detector surrounding a foil. The foils of these two detectors are made of the same atomic material, but each foil is a different isotope, e.g., the first foil may comprise U235 and second foil may comprise U238. The integrating detectors surrounding these pieces of foil measure the total power scattered from the foil and can be similar in composition to the final beam monitor. Non-resonant photons will, after calibration, scatter equally from both foils.

Barty, Christopher P.J.

2013-02-05T23:59:59.000Z

454

Communication: Electronic and transport properties of molecular junctions under a finite bias: A dual mean field approach  

SciTech Connect

We show that when a molecular junction is under an external bias, its properties cannot be uniquely determined by the total electron density in the same manner as the density functional theory for ground state properties. In order to correctly incorporate bias-induced nonequilibrium effects, we present a dual mean field (DMF) approach. The key idea is that the total electron density together with the density of current-carrying electrons are sufficient to determine the properties of the system. Two mean fields, one for current-carrying electrons and the other one for equilibrium electrons can then be derived. Calculations for a graphene nanoribbon junction show that compared with the commonly used ab initio transport theory, the DMF approach could significantly reduce the electric current at low biases due to the non-equilibrium corrections to the mean field potential in the scattering region.

Liu, Shuanglong; Feng, Yuan Ping [Department of Physics and Graphene Research Centre, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore)] [Department of Physics and Graphene Research Centre, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Zhang, Chun, E-mail: phyzc@nus.edu.sg [Department of Physics and Graphene Research Centre, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore) [Department of Physics and Graphene Research Centre, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543 (Singapore)

2013-11-21T23:59:59.000Z

455

Dual expression of hTERT and VEGF prolongs life span and enhances angiogenic ability of aged BMSCs  

SciTech Connect

Highlights: •Expression of hTERT and VEGF changed the lifespan and morphology of hBMSCs. •The expression of VEGF and hTRET promoted angiogenesis in vitro and in vivo. •The expression of VEGF and hTRET in hBMSCs had few effects on tumorigenicity. -- Abstract: Previous studies have confirmed the therapeutic effects of bone marrow stromal cells (BMSCs) transplantation on cerebral ischemia. However, the proliferative, differentiative, and homing capacity of BMSC from the elderly are significantly reduced, especially after several passages expansion in vitro. In this study, by introducing lentivirus-mediated hTERT and VEGF genes to modify human BMSCs from aged donors, we observed extended lifespan, promoted angiogenic capacity while less enhanced tumorigenicity of the genetically engineering BMSCs. These results therefore suggest that the modification of aged BMSCs by dual expression of hTERT and VEGF may be used for autologous cell replacement for ischemic cerebrovascular disease in elderly patients.

Tang, Hao [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China) [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China); Department of Neurosurgery, Affiliated Bayi Brain Hospital, The Military General Hospital of Beijing PLA, Beijing (China); Xiang, Yongsheng [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China) [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China); Department of Neurosurgery, First Affiliated Hospital of Jinan University, Guangzhou (China); Jiang, Xiaodan; Ke, Yiquan; Xiao, Zongyu; Guo, Yang; Wang, Qiujing; Du, Mouxuan; Qin, Linsha; Zou, Yuxi; Cai, Yingqian [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China)] [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China); Chen, Zhenzhou, E-mail: czz1020@163.com [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China)] [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China); Xu, Ruxiang, E-mail: zjxuruxiang@163.com [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China) [Department of Neurosurgery, Zhujiang Hospital, Southern Medical University, Guangzhou (China); Department of Neurosurgery, Affiliated Bayi Brain Hospital, The Military General Hospital of Beijing PLA, Beijing (China)

2013-11-01T23:59:59.000Z

456

TEM and x-ray investigation of single crystal-like zirconia films fabricated by dual ion beam deposition  

SciTech Connect

Single crystal-like yttria-stabilized zirconia (YSZ) thin films have been deposited on amorphous quartz, polycrystalline zirconia, single crystal Si, and Hastelloy substrates using dual ion beam deposition (IBAD). These films are highly crystallographically aligned both normal to and within the film plane. The films are deposited at low substrate temperatures (< 200 C), and the film orientation is substrate independent. 0--20 X-ray diffraction, X-ray rocking curves, X-ray pole figures and X-ray phi scans are used to evaluate the film structure. High resolution cross-sectional TEM is used to examine the evolution of crystallographic film alignment on an amorphous quartz substrate. The data suggest that the evolution of biaxial alignment is nucleation controlled under these conditions.

Ressler, K.G.; Sonnenberg, N.; Cima, M.J. [Massachusetts Inst. of Tech., Cambridge, MA (United States). Ceramics Processing Research Lab.

1996-12-31T23:59:59.000Z

457

The SIDE dual VIS-NIR fiber fed spectrograph for the 10.4 m Gran Telescopio Canarias  

E-Print Network (OSTI)

SIDE (Super Ifu Deployable Experiment) is proposed as second-generation, common-user instrument for the GTC. It will be a low and intermediate resolution fiber fed spectrograph, highly efficient in multi-object and 3D spectroscopy. The low resolution part (R = 1500, 4000) is called Dual VIS-NIR because it will observe in the VIS and NIR bands (0.4 ~V 1.7 microns) simultaneously. Because of the large number of fibers, a set of ~10 identical spectrographs is needed, each with a mirror collimator, a dichroic and two refractive cameras. The cameras are optimized for 0.4 - 0.95 microns (VIS) and 0.95 - 1.7 microns (NIR) respectively.

Rabaza, O; Ubierna, M; Sánchez, J; Azzaro, M; Prada, F

2008-01-01T23:59:59.000Z

458

CHARACTERIZATION OF A SAMPLE OF INTERMEDIATE-TYPE AGNs. I. SPECTROSCOPIC PROPERTIES AND SERENDIPITOUS DISCOVERY OF NEW DUAL AGNs  

SciTech Connect

A sample of 10 nearby intermediate-type active galactic nuclei (AGNs) drawn from the Sloan Digital Sky Survey is presented. The aim of this work is to provide estimations of the black hole (BH) mass for the sample galaxies from the dynamics of the broad-line region. For this purpose, a detailed spectroscopic analysis of the objects was done. Using Baldwin-Phillips-Terlevich diagnostic diagrams, we have carefully classified the objects as true intermediate-type AGNs and found that 80%{sup +7.2%} {sub -17.3%} are composite AGNs. The BH mass estimated for the sample is within 6.54 {+-} 0.16 < log M {sub BH} < 7.81 {+-} 0.14. Profile analysis shows that five objects (J120655.63+501737.1, J121607.08+504930.0, J141238.14+391836.5, J143031.18+524225.8, and J162952.88+242638.3) have narrow double-peaked emission lines in both the red (H{alpha}, [N II] {lambda}{lambda}6548,6583 and [S II] {lambda}{lambda}6716, 6731) and the blue (H{beta} and [O III] {lambda}{lambda}4959, 5007) regions of the spectra, with velocity differences ({Delta}V) between the double peaks within 114 km s{sup -1} < {Delta}V < 256 km s{sup -1}. Two of them, J121607.08+504930.0 and J141238.14+391836.5, are candidates for dual AGNs since their double-peaked emission lines are dominated by AGN activity. In searches of dual AGNs, type 1, type II, and intermediate-type AGNs should be carefully separated, due to the high serendipitous number of narrow double-peaked sources (50% {+-} 14.4%) found in our sample.

Benitez, Erika; Cruz-Gonzalez, Irene; Martinez, Benoni; Jimenez-Bailon, Elena [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 70-264, Mexico D.F. 04510 (Mexico)] [Instituto de Astronomia, Universidad Nacional Autonoma de Mexico, Apdo. Postal 70-264, Mexico D.F. 04510 (Mexico); Mendez-Abreu, Jairo; Lopez-Martin, Luis [Instituto de Astrofisica de Canarias, E-38200 La Laguna, Tenerife (Spain)] [Instituto de Astrofisica de Canarias, E-38200 La Laguna, Tenerife (Spain); Fuentes-Carrera, Isaura [Escuela Superior de Fisica y Matematicas, Instituto Politecnico Nacional (ESFM-IPN), U.P. Adolfo Lopez Mateos, Mexico D.F. 07730 (Mexico)] [Escuela Superior de Fisica y Matematicas, Instituto Politecnico Nacional (ESFM-IPN), U.P. Adolfo Lopez Mateos, Mexico D.F. 07730 (Mexico); Leon-Tavares, Jonathan [Aalto University Metsaehovi Radio Observatory, Metsaehovintie 114, FI-02540, Kylmaelae (Finland)] [Aalto University Metsaehovi Radio Observatory, Metsaehovintie 114, FI-02540, Kylmaelae (Finland); Chavushyan, Vahram H., E-mail: erika@astro.unam.mx [Instituto Nacional de Astrofisica, Optica y Electronica, Apdo. Postal 51-216, 72000 Puebla (Mexico)

2013-01-20T23:59:59.000Z

459

Analysis of ignition behavior in a turbocharged direct injection dual fuel engine using propane and methane as primary fuels  

SciTech Connect

This paper presents experimental analyses of the ignition delay (ID) behavior for diesel-ignited propane and diesel-ignited methane dual fuel combustion. Two sets of experiments were performed at a constant speed (1800 rev/min) using a 4-cylinder direct injection diesel engine with the stock ECU and a wastegated turbocharger. First, the effects of fuel-air equivalence ratios (���© pilot �¢���¼ 0.2-0.6 and ���© overall �¢���¼ 0.2-0.9) on IDs were quantified. Second, the effects of gaseous fuel percent energy substitution (PES) and brake mean effective pressure (BMEP) (from 2.5 to 10 bar) on IDs were investigated. With constant ���© pilot (> 0.5), increasing ���© overall with propane initially decreased ID but eventually led to premature propane autoignition; however, the corresponding effects with methane were relatively minor. Cyclic variations in the start of combustion (SOC) increased with increasing ���© overall (at constant ���© pilot), more significantly for propane than for methane. With increasing PES at constant BMEP, the ID showed a nonlinear (initially increasing and later decreasing) trend at low BMEPs for propane but a linearly decreasing trend at high BMEPs. For methane, increasing PES only increased IDs at all BMEPs. At low BMEPs, increasing PES led to significantly higher cyclic SOC variations and SOC advancement for both propane and methane. Finally, the engine ignition delay (EID) was also shown to be a useful metric to understand the influence of ID on dual fuel combustion.

Polk, A. C.; Gibson, C. M.; Shoemaker, N. T.; Srinivasan, K. K.; Krishnan, S. R.

2011-10-05T23:59:59.000Z

460

Potential of dual-energy subtraction for converting CT numbers to electron density based on a single linear relationship  

SciTech Connect

Purpose: The conversion of the computed tomography (CT) number to electron density is one of the main processes that determine the accuracy of patient dose calculations in radiotherapy treatment planning. However, the CT number and electron density of tissues cannot be generally interrelated via a simple one-to-one correspondence because the CT number depends on the effective atomic number as well as the electron density. The purpose of this study is to present a simple conversion from the energy-subtracted CT number ({Delta}HU) by means of dual-energy CT (DECT) to the relative electron density ({rho}{sub e}) via a single linear relationship. Methods: The {Delta}HU-{rho}{sub e} conversion method was demonstrated by performing analytical DECT image simulations that were intended to imitate a second-generation dual-source CT (DSCT) scanner with an additional tin filtration for the high-kV tube. The {Delta}HU-{rho}{sub e} calibration line was obtained from the image simulation with a 33 cm-diameter electron density calibration phantom equipped with 16 inserts including polytetrafluoroethylene, polyvinyl chloride, and aluminum; the elemental compositions of these three inserts were quite different to those of body tissues. The {Delta}HU-{rho}{sub e} conversion method was also applied to previously published experimental CT data, which were measured using two different CT scanners, to validate the clinical feasibility of the present approach. In addition, the effect of object size on {rho}{sub e}-calibrated images was investigated by image simulations using a 25 cm-diameter virtual phantom for two different filtrations: with and without the tin filter for the high-kV tube. Results: The simulated {Delta}HU-{rho}{sub e} plot exhibited a predictable linear relationship over a wide range of {rho}{sub e} from 0.00 (air) to 2.35 (aluminum). Resultant values of the coefficient of determination, slope, and intercept of the linear function fitted to the data were close to those of the ideal case. The maximum difference between the ideal and simulated {rho}{sub e} values was -0.7%. The satisfactory linearity of {Delta}HU-{rho}{sub e} was also confirmed from analyses of the experimental CT data. In the experimental cases, the maximum difference between the nominal and simulated {rho}{sub e} values was found to be 2.5% after two outliers were excluded. When compared with the case without the tin filter, the {Delta}HU-{rho}{sub e} conversion performed with the tin filter yielded a lower dose and more reliable {rho}{sub e} values that were less affected by the object-size variation. Conclusions: The {Delta}HU-{rho}{sub e} calibration line with a simple one-to-one correspondence would facilitate the construction of a well-calibrated {rho}{sub e} image from acquired dual-kV images, and currently, second generation DSCT may be a feasible modality for the clinical use of the {Delta}HU-{rho}{sub e} conversion method.

Saito, Masatoshi [Department of Radiological Technology, School of Health Sciences, Faculty of Medicine, Niigata University, Niigata 951-8518 (Japan)

2012-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "4-valve dual overhead" 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

Green and Orange CdTe Quantum Dots as Effective pH-Sensitive Fluorescent Probes for Dual Simultaneous and Independent Detection of Viruses  

Science Journals Connector (OSTI)

Green and Orange CdTe Quantum Dots as Effective pH-Sensitive Fluorescent Probes for Dual Simultaneous and Independent Detection of Viruses ... 26 The F0F1-ATP synthase is a nanoscale rotary biological motor. ... On the basis of this primary model, more than three different kinds of QDs could be mixed together to construct multicolor QD biosensors, which may be a feasible method to optical encoding detection of various viruses in the future. ...

Zhengtao Deng; Yun Zhang; Jiachang Yue; Fangqiong Tang; Qun Wei

2007-09-21T23:59:59.000Z

462

Develop the dual fuel conversion system for high output, medium speed diesel engines. Quarterly report number 1, September 1--December 31, 1996  

SciTech Connect

Energy Conversions Incorporated has made substantial progress on the EMD-710 dual-fuel test cell in the first quarter of the project. The project is on schedule and has not met with any major roadblocks that would derail the planned timetable. Please note that much of the work done started before the funding arrived, and therefore those items are not included in the financial expenditures for the quarter.

NONE

1997-01-08T23:59:59.000Z

463

Smart Human Serum Albumin-Indocyanine Green Nanoparticles Generated by Programmed Assembly for Dual-Modal Imaging-Guided Cancer Synergistic Phototherapy  

Science Journals Connector (OSTI)

Smart Human Serum Albumin-Indocyanine Green Nanoparticles Generated by Programmed Assembly for Dual-Modal Imaging-Guided Cancer Synergistic Phototherapy ... To enhance the treatment efficiency of phototherapy and reduce the light-associated side effects, it is highly desirable to improve drug accumulation and precision guided phototherapy for efficient conversion of the absorbed light energy to reactive oxygen species (ROS) and local hyperthermia. ...

Zonghai Sheng; Dehong Hu; Mingbin Zheng; Pengfei Zhao; Huilong Liu; Duyang Gao; Ping Gong; Guanhui Gao; Pengfei Zhang; Yifan Ma; Lintao Cai

2014-12-02T23:59:59.000Z

464

A photometric survey for Lyalpha-HeII dual emitters: Searching for Population III stars in high-redshift galaxies  

E-Print Network (OSTI)

We present a new photometric search for high-z galaxies hosting Population III (PopIII) stars based on deep intermediate-band imaging observations obtained in the Subaru Deep Field (SDF), by using Suprime-Cam on the Subaru Telescope. By combining our new data with the existing broad-band and narrow-band data, we searched for galaxies which emit strongly both in Ly_alpha and in HeII 1640 (``dual emitters'') that are promising candidates for PopIII-hosting galaxies, at 3.93 2 Msun/yr was found by our photometric search in 4.03 x 10^5 Mpc^3 in the SDF. This result disfavors low feedback models for PopIII star clusters, and implies an upper-limit of the PopIII SFR density of SFRD_PopIII < 5 x 10^-6 Msun/yr/Mpc^3. This new selection method to search for PopIII-hosting galaxies should be useful in future narrow-band surveys to achieve the first observational detection of PopIII-hosting galaxies at high redshifts.

Nagao, Tohru; Maiolino, Roberto; Grady, Celestine; Kashikawa, Nobunari; Ly, Chun; Malkan, Matthew; Motohara, Kentaro; Murayama, Takashi; Schaerer, Daniel; Shioya, Yasuhiro; Taniguchi, Yoshiaki

2008-01-01T23:59:59.000Z

465

Dual FIB-SEM 3D imaging and lattice boltzmann modeling of porosimetry and multiphase flow in chalk.  

SciTech Connect

Mercury intrusion porosimetry (MIP) is an often-applied technique for determining pore throat distributions and seal analysis of fine-grained rocks. Due to closure effects, potential pore collapse, and complex pore network topologies, MIP data interpretation can be ambiguous, and often biased toward smaller pores in the distribution. We apply 3D imaging techniques and lattice-Boltzmann modeling in interpreting MIP data for samples of the Cretaceous Selma Group Chalk. In the Mississippi Interior Salt Basin, the Selma Chalk is the apparent seal for oil and gas fields in the underlying Eutaw Fm., and, where unfractured, the Selma Chalk is one of the regional-scale seals identified by the Southeast Regional Carbon Sequestration Partnership for CO2 injection sites. Dual focused ion - scanning electron beam and laser scanning confocal microscopy methods are used for 3D imaging of nanometer-to-micron scale microcrack and pore distributions in the Selma Chalk. A combination of image analysis software is used to obtain geometric pore body and throat distributions and other topological properties, which are compared to MIP results. 3D data sets of pore-microfracture networks are used in Lattice Boltzmann simulations of drainage (wetting fluid displaced by non-wetting fluid via the Shan-Chen algorithm), which in turn are used to model MIP procedures. Results are used in interpreting MIP results, understanding microfracture-matrix interaction during multiphase flow, and seal analysis for underground CO2 storage.

Rinehart, Alex; Petrusak, Robin (Advanced Resources International, Inc., Arlington, VA); Heath, Jason E.; Dewers, Thomas A.; Yoon, Hongkyu

2010-12-01T23:59:59.000Z

466

Development of a common dual axle VNTTM for single- and two-stage off-highway applications  

Science Journals Connector (OSTI)

ABSTRACT Honeywell Turbo Technologies has long been a leader in both the on- and offhway commercial vehicle turbocharger segments. Variable geometry turbines have been used in on-highway applications since the 1990's but to date have had limited usage in off-highway. This paper describes how the patented Dual Axle Variable Nozzle Turbine technology has been adapted and applied for use in the modern heavy duty offenvironment. It details performance targets and mechanical features that were optimized and combined with a new electro-hydraulic actuation system to meet the stringent performance, durability, and emissions targets of a modern TierIV-compliant off-highway diesel engine. The result of the development is the DutyDrive VNTTM which entered production at the end of 2010. The high performance and broad flow range of Honeywell's Variable Nozzle Turbine allowed John Deere to use one common turbocharger to satisfy over 20 unique power ratings, including both two-stage and single stage applications, greatly reducing complexity and development costs. Additionally, this new generation turbocharger assisted John Deere to increase engine power and torque by 10%, while meeting reliability expectations in the high-temperature, high-vibration under-hood environment of a modern premium off-highway application.

J. Wilson; M. Avila; P. Davies; N. Theiss; B. Zollinger

2012-01-01T23:59:59.000Z

467

Theoretical research on working fluid selection for a high-temperature regenerative transcritical dual-loop engine organic Rankine cycle  

Science Journals Connector (OSTI)

Abstract In this paper, a regenerative transcritical dual-loop organic Rankine cycle is proposed to recover the waste heat of the exhaust, engine coolant and all the residual heat of the HT loop. Double regenerators are adopted in this system. Transcritical cycles are used in both loops. Hexamethyldisiloxane (MM), octamethyl cyclotetrasiloxane (D4), octamethyltrisiloxane (MDM), cyclohexane, toluene and n-decane are chosen as the candidate working fluids of the HT loop and \\{R143a\\} is chosen as the working fluid of the LT loop. Influences of inlet temperature of turbine THT (T3) on mass flow rates (mf,HT and mf,LT), net output power (Wnet), energy conversion efficiency (?ec), volumetric expansion ratio (VER), ratio of power consumed to power output (COR) and component irreversibility are analyzed and performance comparison of these working fluids is also evaluated. Results show that toluene possesses the maximum Wnet (42.46 kW), highest ?e (51.92%) and ?ec (12.77%). The increase of T3 worsens system performance, decreasing Wnet, ?e and ?ec. Condenser CLT and turbine TLT possess the least system irreversibility. In addition, turbines and exhaust evaporators are optimized components.

Hua Tian; Lina Liu; Gequn Shu; Haiqiao Wei; Xingyu Liang

2014-01-01T23:59:59.000Z

468

A dual fired downdraft gasifier system to produce cleaner gas for power generation: Design, development and performance analysis  

Science Journals Connector (OSTI)

Abstract The existing biomass gasifier systems have several technical challenges, which need to be addressed. They are reduction of impurities in the gas, increasing the reliability of the system, easy in operation and maintenance. It is also essential to have a simple design of gasifier system for power generation, which can work even in remote locations. A dual fired downdraft gasifier system was designed to produce clean gas from biomass fuel, used for electricity generation. This system is proposed to overcome a number of technical challenges. The system is equipped with dry gas cleaning and indirect gas cooling equipment. The dry gas cleaning system completely eliminates wet scrubbers that require large quantities of water. It also helps to do away with the disposal issues with the polluted water. With the improved gasifier system, the tar level in the raw gas is less than 100 mg Nm?3.Cold gas efficiency has improved to 89% by complete gasification of biomass and recycling of waste heat into the reactor. Several parameters, which are considered in the design and development of the reactors, are presented in detail with their performance indicators.

P. Raman; N.K. Ram; Ruchi Gupta

2013-01-01T23:59:59.000Z

469

Synthesis and evaluation of novel [alpha]-heteroaryl-phenylpropanoic acid derivatives as PPAR[alpha/gamma] dual agonists  

SciTech Connect

The synthesis of a new series of phenylpropanoic acid derivatives incorporating an heteroaryl group at the {alpha}-position and their evaluation for binding and activation of PPAR{alpha} and PPAR{gamma} are presented in this report. Among the new compounds, (S)-3-{l_brace}4-[3-(5-methyl-2-phenyl-oxazol-4-yl)-propyl]-phenyl{r_brace}-2-1,2,3-triazol-2-yl-propionic acid (17j), was identified as a potent human PPAR{alpha}/{gamma} dual agonist (EC{sub 50} = 0.013 and 0.061 {micro}M, respectively) with demonstrated oral bioavailability in rat and dog. 17j was shown to decrease insulin levels, plasma glucose, and triglycerides in the ZDF female rat model. In the human apolipoprotein A-1/CETP transgenic mouse model 17j produced increases in hApoA1 and HDL-C and decreases in plasma triglycerides. The increased potency for binding and activation of both PPAR subtypes observed with 17j when compared to previous analogs in this series was explained based on results derived from crystallographic and modeling studies.

Casimiro-Garcia, Agustin; Bigge, Christopher F.; Davis, Jo Ann; Padalino, Teresa; Pulaski, James; Ohren, Jeffrey F.; McConnell, Patrick; Kane, Christopher D.; Royer, Lori J.; Stevens, Kimberly A.; Auerbach, Bruce; Collard, Wendy; McGregor, Christine; Song, Kun; Pfizer

2010-09-27T23:59:59.000Z

470

The ASTRI Project: prototype status and future plans for a Cherenkov dual-mirror small-telescope array  

E-Print Network (OSTI)

ASTRI ("Astrofisica con Specchi a Tecnologia Replicante Italiana") is a flagship project of the Italian Ministry of Education, University and Research. Within this framework, INAF is currently developing a wide field of view (9.6 degrees in diameter) end-to-end prototype of the CTA small-size telescope (SST), devoted to the investigation of the energy range from a fraction of TeV up to tens of TeVs, and scheduled to start data acquisition in 2014. For the first time, a dual-mirror Schwarzschild-Couder optical design will be adopted on a Cherenkov telescope, in order to obtain a compact optical configuration. A second challenging, but innovative technical solution consists of a modular focal surface camera based on Silicon photo-multipliers with a logical pixel size of 6.2mm x 6.2mm. Here we describe the current status of the project, the expected performance, and its possible evolution in terms of an SST mini-array. This CTA-SST precursor, composed of a few SSTs and developed in collaboration with CTA interna...

Vercellone, S; Maccarone, M C; Di Pierro, F; Vallania, P; Bonnoli, G; Canestrari, R; Pareschi, G; Tosti, G

2013-01-01T23:59:59.000Z

471

Dual passivation of GaAs (110) surfaces using O{sub 2}/H{sub 2}O and trimethylaluminum  

SciTech Connect

The nucleation and passivation of oxide deposition was studied on defect-free GaAs (110) surfaces to understand passivation of surfaces containing only III-V heterobonds. The passivation process on GaAs (110) was studied at the atomic level using scanning tunneling microscopy while the electronic structure was determined by scanning tunneling spectroscopy (STS). The bonding of the oxidant and reductant were modeled with density functional theory. To avoid Fermi level pinning during gate oxide atomic layer deposition, a dual passivation procedure was required using both a reductant, trimethylaluminum (TMA), and an oxidant, O{sub 2} or H{sub 2}O. Dosing GaAs (110) with TMA resulted in the formation of an ordered complete monolayer of dimethylaluminum which passivates the group V dangling bonds but also forms metal-metal bonds with conduction band edge states. These edge states were suppressed by dosing the surface with oxidants O{sub 2} or H{sub 2}O which selectively react with group III-aluminum bonds. The presence of an ordered Al monolayer with a high nucleation density was indirectly confirmed by XPS and STS.

Kent, Tyler J.; Edmonds, Mary [Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093 (United States)] [Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093 (United States); Chagarov, Evgueni [Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093 (United States)] [Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093 (United States); Droopad, Ravi [Department of Physics, Texas State University, San Marcos, Texas 78666 (United States)] [Department of Physics, Texas State University, San Marcos, Texas 78666 (United States); Kummel, Andrew C. [Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093 (United States) [Materials Science and Engineering Program, University of California, San Diego, La Jolla, California 92093 (United States); Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093 (United States)

2013-12-28T23:59:59.000Z

472

RADIOISOTOPE-DRIVEN DUAL-MODE PROPULSION SYSTEM FOR CUBESAT-SCALE PAYLOADS TO THE OUTER PLANETS  

SciTech Connect

It is apparent the cost of planetary exploration is rising as mission budgets declining. Currently small scientific beds geared to performing limited tasks are being developed and launched into low earth orbit (LEO) in the form of small-scale satellite units, i.e., CubeSats. These micro- and nano-satellites are gaining popularity among the university and science communities due to their relatively low cost and design flexibility. To date these small units have been limited to performing tasks in LEO utilizing solar-based power. If a reasonable propulsion system could be developed, these CubeSat platforms could perform exploration of various extra-terrestrial bodies within the solar system engaging a broader range of researchers. Additionally, being mindful of mass, smaller cheaper launch vehicles (approximately 1,000 kgs to LEO) can be targeted. Thus, in effect, allows for beneficial exploration to be conducted within limited budgets. Researchers at the Center for Space Nuclear Research (CSNR) are proposing a low mass, radioisotope-based, dual-mode propulsion system capable of extending the exploration realm of these CubeSats out of LEO.

N. D. Jerred; T. M. Howe; S. D. Howe; A. Rajguru

2014-02-01T23:59:59.000Z

473

Numerical simulation of dual frequency etching reactors: Influence of the external process parameters on the plasma characteristics  

SciTech Connect

A one-dimensional particle-in-cell/Monte Carlo model is used to investigate Ar/CF{sub 4}/N{sub 2} discharges sustained in capacitively coupled dual frequency reactors, with special emphasis on the influence of the reactor parameters such as applied voltage amplitudes and frequencies of the two voltage sources. The presented calculation results include plasma density, ion current, average sheath potential and width, electron and ion average energies and energy distributions, and ionization rates. The simulations were carried out for high frequencies (HFs) of 27, 40, 60, and 100 MHz and a low frequency (LF) of 1 or 2 MHz, varying the LF voltage and keeping the HF voltage constant and vice versa. It is observed that the decoupling of the two sources is possible by increasing the applied HF to very high values (above 60 MHz) and it is not defined by the frequency ratio. Both voltage sources have influence on the plasma characteristics at a HF of 27 MHz and to some extent at 40 MHz. At HFs of 60 and 100 MHz, the plasma density and ion flux are determined only by the HF voltage source. The ion energy increases and the ion energy distribution function (IEDF) becomes broader with HF or LF voltage amplitude, when the other voltage is kept constant. The IEDF is broader with the increase of HF or the decrease of LF.

Georgieva, V.; Bogaerts, A. [Plasma, Laser Ablation and Surface Modeling ANTwerp (PLASMANT), Department of Chemistry, University of Antwerp, Campus Drie Eiken (CDE), Universiteitsplein 1, B-2610 Wilrijk-Antwerp (Belgium)

2005-07-15T23:59:59.000Z

474

COMPARISON OF EXPERIMENTS TO CFD MODELS FOR MIXING USING DUAL OPPOSING JETS IN TANKS WITH AND WITHOUT INTERNAL OBSTRUCTIONS  

SciTech Connect

This paper documents testing methods, statistical data analysis, and a comparison of experimental results to CFD models for blending of fluids, which were blended using a single pump designed with dual opposing nozzles in an eight foot diameter tank. Overall, this research presents new findings in the field of mixing research. Specifically, blending processes were clearly shown to have random, chaotic effects, where possible causal factors such as turbulence, pump fluctuations, and eddies required future evaluation. CFD models were shown to provide reasonable estimates for the average blending times, but large variations -- or scatter -- occurred for blending times during similar tests. Using this experimental blending time data, the chaotic nature of blending was demonstrated and the variability of blending times with respect to average blending times were shown to increase with system complexity. Prior to this research, the variation in blending times caused discrepancies between CFD models and experiments. This research addressed this discrepancy, and determined statistical correction factors that can be applied to CFD models, and thereby quantified techniques to permit the application of CFD models to complex systems, such as blending. These blending time correction factors for CFD models are comparable to safety factors used in structural design, and compensate variability that cannot be theoretically calculated. To determine these correction factors, research was performed to investigate blending, using a pump with dual opposing jets which re-circulate fluids in the tank to promote blending when fluids are added to the tank. In all, eighty-five tests were performed both in a tank without internal obstructions and a tank with vertical obstructions similar to a tube bank in a heat exchanger. These obstructions provided scale models of vertical cooling coils below the liquid surface for a full scale, liquid radioactive waste storage tank. Also, different jet diameters and different horizontal orientations of the jets were investigated with respect to blending. Two types of blending tests were performed. The first set of eighty-one tests blended small quantities of tracer fluids into solution. Data from these tests were statistically evaluated to determine blending times for the addition of tracer solution to tanks, and blending times were successfully compared to Computational Fluid Dynamics (CFD) models. The second set of four tests blended bulk quantities of solutions of different density and viscosity. For example, in one test a quarter tank of water was added to a three quarters of a tank of a more viscous salt solution. In this case, the blending process was noted to significantly change due to stratification of fluids, and blending times increased substantially. However, CFD models for stratification and the variability of blending times for different density fluids was not pursued, and further research is recommended in the area of blending bulk quantities of fluids. All in all, testing showed that CFD models can be effectively applied if statistically validated through experimental testing, but in the absence of experimental validation CFD model scan be extremely misleading as a basis for design and operation decisions.

Leishear, R.; Poirier, M.; Lee, S.; Fowley, M.

2012-06-26T23:59:59.000Z

475

Numerical Simulation of Single- and Dual-media Thermocline Tanks for Energy Storage in Concentrating Solar Power Plants  

Science Journals Connector (OSTI)

Abstract A single molten-salt thermocline tank is a low-cost alternative to conventional multiple-tank systems for concentrating solar power thermal energy storage. Thermocline tanks are typically composed of molten salt and a filler material that provides sensible heat capacity at reduced cost; such tanks are referred to as a dual-media thermocline (DMT). However, inclusion of quartzite rock filler introduces the potential for mechanical ratcheting of the tank wall during thermal cycling. To avoid this potential thermomechanical mode of failure, the tank can be operated solely with molten salt, as a single-medium thermocline (SMT) tank. In the absence of a filler material to suppress formation of tank-scale convection eddies, the SMT tank may exhibit undesirable internal fluid flows in the tank cross-section. The performance of DMT and SMT tanks is compared under cyclic operation, assuming adiabatic external wall boundary conditions. A computational fluid dynamics model is used to solve for the spatial temperature and velocity distributions within the tank. For the DMT tank, a two-temperature model is used to account for the non-thermal equilibrium between the molten salt and the filler material, and Forchheimer's extension of Darcy's Law is added to the porous-medium formulation of the laminar momentum equation. The governing equations are solved numerically using a finite volume approach. For adiabatic external boundaries, the SMT tank yields a percentage point increase in the first and second law efficiencies relative to the DMT tank. Future work is needed to compare the thermocline tank designs with respect to capital cost and storage performance under non-adiabatic wall boundaries.

C. Mira-Hernández; S.M. Flueckiger; S.V. Garimella

2014-01-01T23:59:59.000Z

476

The Upgrade Path from Legacy VME to VXS Dual Star Connectivity for Large Scale Data Acquisition and Trigger Systems  

SciTech Connect

New instrumentation modules have been designed by Jefferson Lab and to take advantage of the higher performance and elegant backplane connectivity of the VITA 41 VXS standard. These new modules are required to meet the 200KHz trigger rates envisioned for the 12GeV experimental program. Upgrading legacy VME designs to the high speed gigabit serial extensions that VXS offers, comes with significant challenges, including electronic engineering design, plus firmware and software development issues. This paper will detail our system design approach including the critical system requirement stages, and explain the pipeline design techniques and selection criteria for the FPGA that require embedded Gigabit serial transceivers. The entire trigger system is synchronous and operates at 250MHz clock with synchronization signals, and the global trigger signals distributed to each front end readout crate via the second switch slot in the 21 slot, dual star VXS backplane. The readout of the buffered detector signals relies on 2eSST over the standard VME64x path at >200MB/s. We have achieved 20Gb/s transfer rate of trigger information within one VXS crate and will present results using production modules in a two crate test configuration with both VXS crates fully populated. The VXS trigger modules that reside in the front end crates, will be ready for production orders by the end of the 2011 fiscal year. VXS Global trigger modules are in the design stage now, and will be complete to meet the installation schedule for the 12GeV Physics program.

Cuevas, C; Barbosa, F J; Dong, H; Gu, W; Jastrzembski, E; Kaneta, S R; Moffitt, B; Nganga, N; Raydo, B J; Somov, A; Taylor, W M

2011-10-01T23:59:59.000Z

477

Space and phase resolved ion energy and angular distributions in single- and dual-frequency capacitively coupled plasmas  

SciTech Connect

The control of ion energy and angular distributions (IEADs) is critically important for anisotropic etching or deposition in microelectronic fabrication processes. With single frequency capacitively coupled plasmas (CCPs), the narrowing in angle and spread in energy of ions as they cross the sheath are definable functions of frequency, sheath width, and mean free path. With increases in wafer size, single frequency CCPs are finding difficulty in meeting the requirement of simultaneously controlling plasma densities, ion fluxes, and ion energies. Dual-frequency CCPs are being investigated to provide this flexible control. The high frequency (HF) is intended to control the plasma density and ion fluxes, while the ion energies are intended to be controlled by the low frequency (LF). However, recent research has shown that the LF can also influence the magnitude of ion fluxes and that IEADs are determined by both frequencies. Hence, separate control of fluxes and IEADs is complex. In this paper, results from a two-dimensional computational investigation of Ar/O{sub 2} plasma properties in an industrial reactor are discussed. The IEADs are tracked as a function of height above the substrate and phase within the rf cycles from the bulk plasma to the presheath and through the sheath with the goal of providing insights to this complexity. Comparison is made to laser-induced fluorescence experiments. The authors found that the ratios of HF/LF voltage and driving frequency are critical parameters in determining the shape of the IEADs, both during the transit of the ion through the sheath and when ions are incident onto the substrate. To the degree that contributions from the HF can modify plasma density, sheath potential, and sheath thickness, this may provide additional control for the IEADs.

Zhang, Yiting; Kushner, Mark J. [Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Ave., Ann Arbor, Michigan 48109-2122 (United States)] [Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Ave., Ann Arbor, Michigan 48109-2122 (United States); Moore, Nathaniel; Pribyl, Patrick; Gekelman, Walter [Department of Physics, University of California, Los Angeles, California 90095 (United States)] [Department of Physics, University of California, Los Angeles, California 90095 (United States)

2013-11-15T23:59:59.000Z

478

An investigation of diesel–ignited propane dual fuel combustion in a heavy-duty diesel engine  

Science Journals Connector (OSTI)

Abstract This paper presents a detailed experimental analysis of diesel–ignited propane dual fuel combustion on a 12.9-l, six-cylinder, production heavy-duty diesel engine. Gaseous propane was fumigated upstream of the turbocharger air inlet and ignited using direct injection of diesel sprays. Results are presented for brake mean effective pressures (BMEP) from 5 to 20 bar and different percent energy substituted (PES) by propane at a constant engine speed of 1500 rpm. The effect of propane PES on apparent heat release rates, combustion phasing and duration, fuel conversion and combustion efficiencies, and engine-out emissions of oxides of nitrogen (NOx), smoke, carbon monoxide (CO), and total unburned hydrocarbons (HC) were investigated. Exhaust particle number concentrations and size distributions were also quantified for diesel–ignited propane combustion. With stock engine parameters, the maximum propane PES was limited to 86%, 60%, 33%, and 25% at 5, 10, 15, and 20 bar BMEPs, respectively, either by high maximum pressure rise rates (MPRR) or by excessive HC and CO emissions. With increasing PES, while fuel conversion efficiencies increased slightly at high \\{BMEPs\\} or decreased at low BMEPs, combustion efficiencies uniformly decreased. Also, with increasing PES, \\{NOx\\} and smoke emissions were generally decreased but these reductions were accompanied by higher HC and CO emissions. Exhaust particle number concentrations decreased with increasing PES at low loads but showed the opposite trends at higher loads. At 10 bar BMEP, by adopting a different fueling strategy, the maximum possible propane PES was extended to 80%. Finally, a limited diesel injection timing study was performed to identify the optimal operating conditions for the best efficiency-emissions-MPRR tradeoffs.

Andrew C. Polk; Chad D. Carpenter; Kalyan Kumar Srinivasan; Sundar Rajan Krishnan

2014-01-01T23:59:59.000Z

479

Near-resonance enhanced O2 detection for dual-broadband pure rotational coherent anti-Stokes Raman scattering with an ultraviolet-visible setup at 266 nm  

SciTech Connect

Broadband and dual-broadband coherent anti-Stokes Raman scattering (CARS) are widely established tools for nonintrusive gas diagnostics. Up to now the investigations have been mainly performed for electronic nonresonant conditions of the gas species of interest. We report on the enhancement of the O2-N2 detection limit of dual-broadband pure rotational CARS by shifting the wavelength of the narrowband pump laser from the commonly used 532-266 nm. This enhancement is caused when the Schumann-Runge absorption band is approached near 176 nm. The principal concept of this experiment, i.e., covering the Raman resonance with a single- or dual-broadband combination of lasers in the visible range and moving only the narrowband probe laser near or directly into electronic resonant conditions in the UV range, should also be applicable to broadband CARS experiments to directly exploit electronic resonance effects for the purpose of single-shot concentration measurements of minority species. To quantify the enhancement in O2 sensitivity, comparative measurements at both a 266 and a 532 nm narrowband pump laser wavelength are presented, employing a 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyryl)-4H-pyram (DCM) dye laser as a broadband laser source at 635 nm. An increase of approximately 13% in the ratio of the rotational CARS cross sections of O2 and N2 was obtained. The broad spectral width of the CARS excitation profile was approximately equal for both setups. Further enhancement should be achievable by shifting the narrowband pump laser closer toward 176 nm, for example, with a frequency-doubled optical parametric oscillator or an excimer laser. The principal concept of this experiment should also be applicable to broadband CARS experiments to directly exploit electronic resonance effects of the narrowband pump laser with electronic transitions of minority species for the purpose of single-shot concentration measurements of those species.

Schenk, Martin; Seeger, Thomas; Leipertz, Alfred

2005-07-01T23:59:59.000Z

480

Ombuin-3-O-?-D-glucopyranoside from Gynostemma pentaphyllum is a dual agonistic ligand of peroxisome proliferator-activated receptors ? and ?/?  

SciTech Connect

Highlights: ? Ombuin-3-O-?-D-glucopyranoside is a dual ligand for PPAR? and ?/?. ? Ombuin-3-O-?-D-glucopyranoside reduces cellular lipid levels in multiple cell types. ? Cells stimulated with ombuine up-regulated target genes in cholesterol efflux. ? Cells stimulated with ombuine regulated target fatty acid ?-oxidation and synthesis. ? Ombuin-3-O-?-D-glucopyranoside could ameliorate hyperlipidemia and hepatic steatosis. -- Abstract: We demonstrated that ombuin-3-O-?-D-glucopyranoside (ombuine), a flavonoid from Gynostemma pentaphyllum, is a dual agonist for peroxisome proliferator-activated receptors (PPARs) ? and ?/?. Using surface plasmon resonance (SPR), time-resolved fluorescence resonance energy transfer (FRET) analyses, and reporter gene assays, we showed that ombuine bound directly to PPAR? and ?/? but not to PPAR? or liver X receptors (LXRs). Cultured HepG2 hepatocytes stimulated with ombuine significantly reduced intracellular concentrations of triglyceride and cholesterol and downregulated the expression of lipogenic genes, including sterol regulatory element binding protein-1c (SREBP1c) and stearoyl-CoA desaturase-1 (SCD-1), with activation of PPAR? and ?/?. Activation of LXRs by ombuine was confirmed by reporter gene assays, however, SPR and cell-based FRET assays showed no direct binding of ombuine to either of the LXRs suggesting LXR activation by ombuine may be operated via PPAR? stimulation. Ombuine-stimulated macrophages showed significantly induced transcription of ATP binding cassette cholesterol transporter A1 (ABCA1) and G1 (ABCG1), the key genes in reverse cholesterol transport, which led to reduced cellular cholesterol concentrations. These results suggest that ombuine is a dual PPAR ligand for PPAR? and ?/? with the ability to decrease lipid concentrations by reducing lipogenic gene expression in hepatocytes and inducing genes involved in cholesterol efflux in macrophages.

Malek, Mastura Abd; Hoang, Minh-Hien; Jia, Yaoyao; Lee, Ji Hae; Jun, Hee Jin [Department of Biotechnology, Graduate School of Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of) [Department of Biotechnology, Graduate School of Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of); Division of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of); Lee, Dong-Ho [Department of Biotechnology, Graduate School of Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of)] [Department of Biotechnology, Graduate School of Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of); Lee, Hak Ju [Division of Green Business Management, Department of Forest Resources Utilization, Korean Forest Research Institute, Seoul 130-712 (Korea, Republic of)] [Division of Green Business Management, Department of Forest Resources Utilization, Korean Forest Research Institute, Seoul 130-712 (Korea, Republic of); Lee, Chul; Lee, Myung Koo [College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of)] [College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of); Hwang, Bang Yeon, E-mail: byhwang@chungbuk.ac.kr [College of Pharmacy, Chungbuk National University, Cheongju, Chungbuk 361-763 (Korea, Republic of); Lee, Sung-Joon, E-mail: junelee@korea.ac.kr [Department of Biotechnology, Graduate School of Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of) [Department of Biotechnology, Graduate School of Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of); Division of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University, Seoul 136-713 (Korea, Republic of)

2013-01-25T23:59:59.000Z

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481

Conversion of the energy-subtracted CT number to electron density based on a single linear relationship: an experimental verification using a clinical dual-source CT scanner  

Science Journals Connector (OSTI)

In radiotherapy treatment planning, the conversion of the computed tomography (CT) number to electron density is one of the main processes that determine the accuracy of patient dose calculations. However, in general, the CT number and electron density of tissues cannot be interrelated using a simple one-to-one correspondence. This study aims to experimentally verify the clinical feasibility of an existing novel conversion method proposed by the author of this note, which converts the energy-subtracted CT number (?HU) to the relative electron density (?e) via a single linear relationship by using a dual-energy CT (DECT). The ?HU–?e conversion was performed using a clinical second-generation dual-source CT scanner operated in the dual-energy mode with tube potentials of 80 kV and 140 kV with and without an additional tin filter. The ?HU–?e calibration line was obtained from the DECT image acquisition for tissue substitutes in an electron density phantom. In addition, the effect of object size on ?HU–?e conversion was also experimentally investigated. The plot of the measured ?HU versus nominal ?e values exhibited a single linear relationship over a wide ?e range from 0.00 (air) to 2.35 (aluminum). The ?HU–?e conversion performed with the tin filter yielded a lower dose and more reliable ?e values that were less affected by the object-size variation when compared to the corresponding values obtained for the case without the tin filter.

Masayoshi Tsukihara; Yoshiyuki Noto; Takahide Hayakawa; Masatoshi Saito

2013-01-01T23:59:59.000Z

482

Improved blue response and efficiency of A-Si:H solar cells deposited from disilane using a dual-chamber plasma system  

SciTech Connect

Thin film amorphous silicon solar cells with glass/SnO/sub 2//p/i/n/Al structures and 6 to 7% AM1 conversion efficiencies were fabricated at rapid deposition rates in a newly constructed dual-chamber glow discharge deposition system. The 500 nm thick intrinsic layer was deposited at the rate of 1.7 nm/s using disilane (Si/sub 2/H/sub 6/)-helium mixtures. This deposition rate is an order of magnitude greater than conventional high efficiency amorphous silicon solar cell depositions. Residual boron doping effects at the p/i interface can severely degrade cell performance particularly when the intrinsic layer is deposited in one chamber of the dual-chamber system and the intrinsic layer is deposited in the other chamber that is free of boron contaminants. Parameters such as electrode spacing, Si/sub 2/H/sub 6/ partial pressure and flow rate were optimized to produce uniform deposition over large areas. At the substrate temperature T/sub s/ selected for solar cell intrinsic layer deposition, the spin density was measured to be a minimum at 5 x 10/sup 15//cm/sup 3/. For a given T/sub s/, an intrinsic layer deposited from Si/sub 2/H/sub 6/ absorbs fewer photons and can generate less current under solar simulation than a similar film produced from monosilane. Identical solar cells were deposited in either the single-chamber mode or the dual-chamber mode for comparison. Single-chamber mode cells perform poorly over the visible wavelengths and hence produce low short circuit currents. The dual-chamber mode cells show a significant improvement in blue response and a factor of two increase in short circuit current over the single-chamber mode cells. Under short circuit conditions, 15 mA/cm/sup 2/ was generated from rapidly deposited (1.7 nm/s) cells from disilane and 18 mA/cm/sup 2/ from low deposition rate (0.18 nm/s) monosilane cells. These values are comparable to or better than those reported for similar cells by other groups.

Rajeswaran, G.; Vanier, P.E.; Corderman, R.R.; Kampas, F.J.

1985-01-01T23:59:59.000Z

483

Simultaneous TE{sub 1} and TE{sub 2} mode lasing yielding dual-wavelength oscillation in a semiconductor laser with a tunnel junction  

SciTech Connect

Dual-frequency oscillation is obtained and investigated in a new type of injection heterolaser, an interband two-stage cascade laser with a tunneling p-n junction separating two active regions with quantum wells located in a common waveguide. The laser design provides for simultaneous oscillation at the first-order TE mode of wavelength {lambda} = 1.086 {mu}m and the second-order TE mode of wavelength {lambda} = 0.96 {mu}m in the continuous-wave regime at room temperature.

Aleshkin, V. Ya., E-mail: aleshkin@ipm.sci.nnov.ru [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Babushkina, T. S.; Birykov, A. A. [Nizhni Novgorod State University, Physicotechnical Institute (Russian Federation); Dubinov, A. A. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Zvonkov, B. N.; Kolesnikov, M. N.; Nekorkin, S. M. [Nizhni Novgorod State University, Physicotechnical Institute (Russian Federation)

2011-05-15T23:59:59.000Z

484

Combined iterative reconstruction and image-domain decomposition for dual energy CT using total-variation regularization  

SciTech Connect

Purpose: Dual-energy CT (DECT) is being increasingly used for its capability of material decomposition and energy-selective imaging. A generic problem of DECT, however, is that the decomposition process is unstable in the sense that the relative magnitude of decomposed signals is reduced due to signal cancellation while the image noise is accumulating from the two CT images of independent scans. Direct image decomposition, therefore, leads to severe degradation of signal-to-noise ratio on the resultant images. Existing noise suppression techniques are typically implemented in DECT with the procedures of reconstruction and decomposition performed independently, which do not explore the statistical properties of decomposed images during the reconstruction for noise reduction. In this work, the authors propose an iterative approach that combines the reconstruction and the signal decomposition procedures to minimize the DECT image noise without noticeable loss of resolution. Methods: The proposed algorithm is formulated as an optimization problem, which balances the data fidelity and total variation of decomposed images in one framework, and the decomposition step is carried out iteratively together with reconstruction. The noise in the CT images from the proposed algorithm becomes well correlated even though the noise of the raw projections is independent on the two CT scans. Due to this feature, the proposed algorithm avoids noise accumulation during the decomposition process. The authors evaluate the method performance on noise suppression and spatial resolution using phantom studies and compare the algorithm with conventional denoising approaches as well as combined iterative reconstruction methods with different forms of regularization. Results: On the Catphan©600 phantom, the proposed method outperforms the existing denoising methods on preserving spatial resolution at the same level of noise suppression, i.e., a reduction of noise standard deviation by one order of magnitude. This improvement is mainly attributed to the high noise correlation in the CT images reconstructed by the proposed algorithm. Iterative reconstruction using different regularization, including quadratic orq-generalized Gaussian Markov random field regularization, achieves similar noise suppression from high noise correlation. However, the proposed TV regularization obtains a better edge preserving performance. Studies of electron density measurement also show that our method reduces the average estimation error from 9.5% to 7.1%. On the anthropomorphic head phantom, the proposed method suppresses the noise standard deviation of the decomposed images by a factor of ?14 without blurring the fine structures in the sinus area. Conclusions: The authors propose a practical method for DECT imaging reconstruction, which combines the image reconstruction and material decomposition into one optimization framework. Compared to the existing approaches, our method achieves a superior performance on DECT imaging with respect to decomposition accuracy, noise reduction, and spatial resolution.

Dong, Xue; Niu, Tianye; Zhu, Lei, E-mail: leizhu@gatech.edu [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)] [Nuclear and Radiological Engineering and Medical Physics Programs, The George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332 (United States)

2014-05-15T23:59:59.000Z

485

Dual capacity reciprocating compressor  

DOE Patents (OSTI)

A multi-cylinder compressor particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor rotation is provided with an eccentric cam on a crank pin under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180[degree] apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons whose connecting rods ride on a crank pin without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation. 6 figs.

Wolfe, R.W.

1984-10-30T23:59:59.000Z

486

Dual capacity reciprocating compressor  

DOE Patents (OSTI)

A multi-cylinder compressor 10 particularly useful in connection with northern climate heat pumps and in which different capacities are available in accordance with reversing motor 16 rotation is provided with an eccentric cam 38 on a crank pin 34 under a fraction of the connecting rods, and arranged for rotation upon the crank pin between opposite positions 180.degree. apart so that with cam rotation on the crank pin such that the crank throw is at its normal maximum value all pistons pump at full capacity, and with rotation of the crank shaft in the opposite direction the cam moves to a circumferential position on the crank pin such that the overall crank throw is zero. Pistons 24 whose connecting rods 30 ride on a crank pin 36 without a cam pump their normal rate with either crank rotational direction. Thus a small clearance volume is provided for any piston that moves when in either capacity mode of operation.

Wolfe, Robert W. (Wilkinsburg, PA)

1984-01-01T23:59:59.000Z

487

Dual Purpose Plants  

Science Journals Connector (OSTI)

The method of allocation of steam generating costs greatly influences the specific cost of heating steam and desalted seawater. From the point of view of social economics, the cost allocation method, based on ...

Prof. Dr. Anthony Delyannis; Dr. Euridike-Emmy Delyannis

1980-01-01T23:59:59.000Z

488

Dietary flavonoid fisetin: A novel dual inhibitor of PI3K/Akt and mTOR for prostate cancer management  

Science Journals Connector (OSTI)

Epidemiologic and case control population based studies over the past few decades have identified diet as an important determinant of cancer risk. This evidence has kindled interest into research on bioactive food components and has till date resulted in the identification of many compounds with cancer preventive and therapeutic potential. Among such compounds has been fisetin (3,7,3?,4?-tetrahydroxyflavone), a flavonol and a member of the flavonoid polyphenols that also include quercetin, myricetin and kaempferol. Fisetin is commonly found in many fruits and vegetables such as apples, persimmons, grapes, kiwis, strawberries, onions and cucumbers. We evaluated the effects of fisetin against melanoma and cancers of the prostate, pancreas and the lungs. Using prostate and lung adenocarcinoma cells, we demonstrated that fisetin acts as a dual inhibitor of the PI3K/Akt and the mTOR pathways. This is a significant finding considering the fact that mTOR is phosphorylated and its activation is more frequent in tumors with overexpression of PI3K/Akt. Dual inhibitors of PI3K/Akt and mTOR signaling have been suggested as valuable agents for treating such cancers. Here, we summarize our findings on the dietary flavonoid fisetin and its effects on cancer with particular focus on prostate cancer. Our observations and findings from other laboratories suggest that fisetin could be a useful chemotherapeutic agent that could be used either alone or as an adjuvant with conventional chemotherapeutic drugs for the management of prostate and other cancers.

Vaqar Mustafa Adhami; Deeba Nadeem Syed; Naghma Khan; Hasan Mukhtar

2012-01-01T23:59:59.000Z

489

Effect of nonlinear optical three-wave interaction on the lasing parameters of a dual-wavelength vertical-external-cavity surface-emitting laser  

SciTech Connect

The influence of nonlinear optical interaction in a semiconductor dual-wavelength vertical-external-cavity surface-emitting laser on the main parameters of dual-wavelength radiation and lasing in the long-wavelength part of the mid-IR range, obtained in this laser as a result of nonlinear wave mixing, is investigated. An increase in the pump power leads to saturation of the short-wavelength lasing intensity and to a more rapid rise in the long-wavelength lasing intensity in comparison with the linear increase in lasing intensity in these regions in the absence of nonlinear interaction. Under the conditions of nonlinear interaction, the carrier concentration in the active layers is not stabilised near the lasing threshold but changes with an increase in the pump intensity and provides the corresponding gain in the laser active region, thus maintaining steadystate lasing. Some ways for modifying the laser active region in order to obtain the most efficient lasing in the mid-IR range are proposed. (nonlinear optical phenomena)

Morozov, M Yu; Morozov, Yu A [Kotel'nikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Saratov Branch, Saratov (Russian Federation); Krasnikova, I V [Yu A Gagarin Saratov State Technical University, Saratov (Russian Federation)

2013-09-30T23:59:59.000Z

490

Preparation of frustule-like 1,2-ethylene-silica nanospheres through a chiral amphiphile/organic solvent dual-templating approach  

SciTech Connect

Graphical abstract: Display Omitted Highlights: ? Frustule-like 1,2-ethylene-silicas were prepared through a dual-templating approach. ? The morphologies and pore architectures of the 1,2-ethylene-silicas are tunable. ? Mesoporous 1,2-ethylene-silica nanotubes were also prepared. -- Abstract: Hollow silica nanospheres with mesopores in the walls have been widely studied because of their potential applications in catalysis and drug release. Hollow organosilica nanospheres also attracted much attention because of their tunable wall backbones and wider applications. Herein, frustule-like 1,2-ethylene-silicas were obtained using a chiral amphiphile, CHCl{sub 3}, and a dual-templating approach. The morphologies and pore architectures of the 1,2-ethylene-silicas are tunable by changing the amount of CHCl{sub 3} in the reaction mixture. With the addition of CHCl{sub 3} in the reaction mixtures, hollow 1,2-ethylene-silica nanospheres with opened mesopores in the walls were feasible. Moreover, 1,2-ethylene-silicas with mesopores on the surfaces and coiled pore channels within the walls were obtained using the chiral amphiphile in a single-templating approach. These 1,2-ethylene-silicas were characterized using field-emission scanning electron microscopy, transmission electron microscopy, X-ray diffraction and N{sub 2} sorptions.

Zhao, Yanwei; Huang, Zhibin; Yan, Zhuojun; Wang, Sibing; Li, Baozong [Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China)] [Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China); Li, Yi, E-mail: liyi@suda.edu.cn [Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China)] [Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China); Yang, Yonggang [Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China)] [Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123 (China)

2013-02-15T23:59:59.000Z

491

Multidimensional CFD simulation of syngas combustion in a micro-pilot-ignited dual-fuel engine using a constructed chemical kinetics mechanism  

Science Journals Connector (OSTI)

A multidimensional computational fluid dynamics (CFD) simulation of a constructed syngas chemical kinetic mechanism was performed to evaluate the combustion of syngas in a supercharged dual-fuel engine for various syngas initial compositions under lean conditions. The modelled results were validated by comparing predictions against corresponding experimental data for a supercharged dual-fuel engine. The predicted and measured in-cylinder pressure, temperature, and rate of heat release (ROHR) data were in good agreement. The effect of the hydrogen peroxide chain-propagation reaction on the progress of combustion under supercharged conditions was examined for different types of syngas using various initial H2 concentrations. The effect of the main syngas kinetic mechanism reactions on the combustion progress was analysed in terms of their contribution to the total heat of the reaction. The best results compared with experimental data were obtained in the range of equivalence ratios below about 0.8 for all types of syngas considered in this paper. As the equivalence ratio increased above 0.8, the results deviated from the experiment data. The spatial distribution of the in-cylinder temperature and OH? within this equivalence-ratio range showed the completeness of the combustion. The present CFD model captured the overall combustion process well and could be further developed into a useful tool for syngas-engine combustion simulations.

Ulugbek Azimov; Masahiro Okuno; Kazuya Tsuboi; Nobuyuki Kawahara; Eiji Tomita

2011-01-01T23:59:59.000Z

492

DAMAGE DETECTION STRATEGIES IN STRUCTURAL HEALTH MONITORING OF OVERHEAD POWER TRANSMISSION SYSTEM  

E-Print Network (OSTI)

part of T&D System that goes from the power plant to substations near demand points. "Distribution" refers to the low voltage part of T&D System that connects substations and consumers' switchgear boxes of 245 HV lines that gives a total of 13 053 km of HV lines distributed on the area of 312 679 km2

Boyer, Edmond

493

Medium Voltage Overhead Power-line Broadband Communications; Transmission Capacity and Electromagnetic Interference  

E-Print Network (OSTI)

and Electromagnetic Interference P. Amirshahi and M. Kavehrad (FIEEE) The Pennsylvania State University, Department distribution networks for broadband power-line communications applications. Electromagnetic interference

Kavehrad, Mohsen

494

Development of a Graphic User Interface for an Overhead Conductor Sag Instrument  

E-Print Network (OSTI)

Research Center program. Our thanks is given to Entergy for its support of this project and the prior to this project: Baj Agrawal Arizona Public Service Company Industry advisor Floyd Galvan Entergy Industry advisor Robert G. Olsen Washington State University University advisor Lance Priez Entergy Industry advisor John

495

Power-aware node-disjoint multipath source routing with low overhead in MANET  

Science Journals Connector (OSTI)

With the advance of wireless communication technologies, small-size and high-performance computing and communication devices like laptops and personal digital assistants are increasingly used in daily life. After the success of second generation mobile system, more interest was started in wireless communications. This interest had led to two types of the wireless networks such as infrastructure wireless network and infrastructure less wireless network, also called mobile ad hoc network (MANET). The research challenges in MANET are related to the routing, security, reliability, scalability, quality of services, internetworking, power consumption and multimedia applications. All the mobile nodes of MANET operate on the battery power; hence power consumption becomes an important issue in MANET. It proposes a power-aware node-disjoint multipath source routing (PNDMSR) for real-time traffic, which balances the node energy utilisation to increase the network lifetime. It takes the network congestion into account to reduce the routing delay across the network, and increases the reliability of the data packets reaching the destination.

M. Bheemalingaiah; M.M. Naidu; D. Sreenivasa Rao; G. Varaprasad

2009-01-01T23:59:59.000Z

496

Overheads, Safety Analysis and Engineering FY 1995 Site Support Program Plan WBS 6.3.5  

SciTech Connect

The Safety Analysis & Engineering (SA&E) department provides core competency for safety analysis and risk documentation that supports achievement of the goals and mission as described in the Hanford Mission Plan, Volume I, Site Guidance (DOE-RL 1993). SA&E operations are integrated into the programs that plan and conduct safe waste management, environmental restoration, and operational activities. SA&E personnel are key members of task teams assigned to eliminate urgent risks and inherent threats that exist at the Hanford Site. Key to ensuring protection of public health and safety, and that of onsite workers, are the products and services provided by the department. SA&E will continue to provide a leadership role throughout the DOE complex with innovative, cost-effective approaches to ensuring safety during environmental cleanup operations. The SA&E mission is to provide support to direct program operations through safety analysis and risk documentation and to maintain an infrastructure responsive to the evolutionary climate at the Hanford Site. SA&E will maintain the appropriate skills mix necessary to fulfill the customers need to conduct all operations in a safe and cost-effective manner while ensuring the safety of the public and the onsite worker.

DiVincenzo, E.P.

1994-09-27T23:59:59.000Z

497

Overhead electric power transmission line jumpering system for bundles of five or more subconductors  

DOE Patents (OSTI)

Jumpering of electric power transmission lines at a dead end tower. Two transmission line conductor bundles each contain five or more spaced apart subconductors (5) arranged in the shape of a cylinder having a circular cross section. The ends of each bundle of subconductors are attached with insulators to a dead end tower (1). Jumpering allows the electric current to flow between the two bundles of subconductors using jumper buses, internal jumper conductors, and external jumper conductors. One or more current collecting jumper buses (37) are located inside each bundle of subconductors with each jumper bus being attached to the end of a subconductor. Small-diameter internal jumper conductors (33) are located in the inherently electrically shielded area inside each bundle of subconductors with each subconductor (except ones having an attached jumper bus) having one internal jumper conductor connected between that subconductor's end and a jumper bus. Large-diameter external jumper conductors (9) are located outside each bundle of subconductors with one or more external jumper conductors being connected between the jumper buses in one bundle of subconductors and the jumper buses in the other bundle.

Winkelman, Paul F. (Beaverton, OR)

1982-01-01T23:59:59.000Z

498

The Missile Gap; Overhead for Federal Research Grants; Aid to Education and Civil Rights  

Science Journals Connector (OSTI)

...Netherlands Government is pro-viding financial support for the Euro-451 pean Center...countries, as part of the U.S. Mutual Assistance Program. The current re-lease gives...of anesthesiology at the University of Minnesota. He has been chief of the department...

1961-02-17T23:59:59.000Z

499

Performance Evaluation for Modular, Scalable Overhead Cooling Systems In Data Centers  

E-Print Network (OSTI)

Total Power for Server Power Cooling Module Power (kW) (Cooling is the amount of cooling power removed from the dataratio of total cooling power to the cooling transported by

Xu, TengFang T.

2009-01-01T23:59:59.000Z

500

Design and fault analysis of a 345KV 220 mile overhead transmission line.  

E-Print Network (OSTI)

??Efficient and reliable transmission of bulk power economically benefits both the power company and consumer. This report gives clarification to concept and procedure in design… (more)

Clawson, Greg

2012-01-01T23:59:59.000Z