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


1

DC Resistivity Survey (Wenner Array) At Mt Princeton Hot Springs...  

Open Energy Info (EERE)

Determination of groundwater flux patterns Notes Researchers measured DC resistivity and produced 12 resistivity profiles, each approximately 1.3 km in length. Equilibrium...

2

Dissipative Cryogenic Filters with Zero DC Resistance  

SciTech Connect (OSTI)

The authors designed, implemented and tested cryogenic RF filters with zero DC resistance, based on wires with a superconducting core inside a resistive sheath. The superconducting core allows low frequency currents to pass with negligible dissipation. Signals above the cutoff frequency are dissipated in the resistive part due to their small skin depth. The filters consist of twisted wire pairs shielded with copper tape. Above approximately 1 GHz, the attenuation is exponential in {radical}{omega}, as typical for skin depth based RF filters. By using additional capacitors of 10 nF per line, an attenuation of at least 45 dB above 10 MHz can be obtained. Thus, one single filter stage kept at mixing chamber temperature in a dilution refrigerator is sufficient to attenuate room temperature black body radiation to levels corresponding to 10 mK above about 10 MHz.

Bluhm, Hendrik; Moler, Kathryn A.; /Stanford U., Appl. Phys. Dept

2008-04-22T23:59:59.000Z

3

DC Resistivity Survey (Pole-Dipole Array) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC JumpCrow Lake Wind JumpCuttings AnalysisDC Resistivity

4

DC Resistivity Survey (Dipole-Dipole Array) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC JumpCrow Lake Wind JumpCuttings AnalysisDC Resistivity Survey

5

DC Resistivity Survey (Schlumberger Array) At Coso Geothermal Area (1977) |  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC JumpCrow Lake Wind JumpCuttings AnalysisDC ResistivityOpen

6

DC Resistivity Survey (Wenner Array) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC JumpCrow Lake Wind JumpCuttings AnalysisDC ResistivityOpen Jump

7

Dissipative cryogenic filters with zero dc resistance Hendrik Bluhma  

E-Print Network [OSTI]

additional capacitors of 10 nF per line, an attenuation of at least 45 dB above 10 MHz can be obtained. Thus requirements also occur for flux bias lines of super- conducting qubits. Most flux biased qubit experiments cur resistive con- ductor. The low frequency attenuation is increased by adding two discrete capacitors

Moler, Kathryn A.

8

Multiphase soft switched DC/DC converter and active control technique for fuel cell ripple current elimination  

DOE Patents [OSTI]

DC/DC converter has a transformer having primary coils connected to an input side and secondary coils connected to an output side. Each primary coil connects a full-bridge circuit comprising two switches on two legs, the primary coil being connected between the switches on each leg, each full-bridge circuit being connected in parallel wherein each leg is disposed parallel to one another, and the secondary coils connected to a rectifying circuit. An outer loop control circuit that reduces ripple in a voltage reference has a first resistor connected in series with a second resistor connected in series with a first capacitor which are connected in parallel with a second capacitor. An inner loop control circuit that reduces ripple in a current reference has a third resistor connected in series with a fourth resistor connected in series with a third capacitor which are connected in parallel with a fourth capacitor.

Lai, Jih-Sheng (Blacksburg, VA); Liu, Changrong (Sunnyvale, CA); Ridenour, Amy (Salem, VA)

2009-04-14T23:59:59.000Z

9

Measurement of volume resistivity/conductivity of metallic alloy in inhibited seawater by optical interferometry techniques  

SciTech Connect (OSTI)

Optical interferometry techniques were used for the first time to measure the volume resistivity/conductivity of carbon steel samples in seawater with different concentrations of a corrosion inhibitor. In this investigation, the real-time holographic interferometry was carried out to measure the thickness of anodic dissolved layer or the total thickness, U{sub total}, of formed oxide layer of carbon steel samples during the alternating current (ac) impedance of the samples in blank seawater and in 5-20 ppm TROS C-70 inhibited seawater, respectively. In addition, a mathematical model was derived in order to correlate between the ac impedance (resistance) and the surface (orthogonal) displacement of the surface of the samples in solutions. In other words, a proportionality constant [resistivity ({rho}) or conductivity ({sigma})= 1/{rho}] between the determined ac impedance [by electrochemical impedance spectroscopy (EIS) technique] and the orthogonal displacement (by the optical interferometry techniques) was obtained. The value of the resistivity of the carbon steel sample in the blank seawater was found similar to the value of the resistivity of the carbon steel sample air, around 1 x 10{sup -5}{Omega} cm. On the contrary, the measured values of the resistivity of the carbon steel samples were 1.85 x 10{sup 7}, 3.35 x 10{sup 7}, and 1.7 x 10{sup 7}{Omega} cm in 5, 10, and 20 ppm TROS C-70 inhibited seawater solutions, respectively. Furthermore, the determined value range of {rho} of the formed oxide layers, from 1.7 x 10{sup 7} to 3.35 x 10{sup 7}{Omega} cm, is found in a reasonable agreement with the one found in literature for the Fe oxide-hydroxides, i.e., goethite ({alpha}-FeOOH) and for the lepidocrocite ({gamma}-FeOOH), 1 x 10{sup 9}{Omega} cm. The {rho} value of the Fe oxide-hydroxides, 1 x 10{sup 9}{Omega} cm, was found slightly higher than the {rho} value range of the formed oxide layer of the present study. This is because the former value was determined by a dc method rather than by an electromagnetic method, i.e., holographic interferometry with applications of EIS, i.e., ac method. As a result, erroneous measurements were recorded due to the introduction of heat to Fe oxide-hydroxides.

Habib, K. [Materials Science Laboratory, Department of Advanced Systems KISR, P.O. Box 24885, SAFAT 13109 (Kuwait)

2011-03-15T23:59:59.000Z

10

DC Resistivity Survey (Dipole-Dipole Array) At Waunita Hot Springs...  

Open Energy Info (EERE)

Notes Heinrichs Geoexploration Company conducted two phases of eletrical resistivity tomography around the Waunita Hot Springs and Tomichi Dome area. The first phase consisted of...

11

High efficiency resonant dc/dc converter for solar power applications .  

E-Print Network [OSTI]

??This thesis presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage… (more)

Inam, Wardah

2013-01-01T23:59:59.000Z

12

HF treatment effect for carbon deposition on silicon (111) by DC sputtering technique  

SciTech Connect (OSTI)

Surface modifications of Si (111) substrate by HF solution for thin film carbon deposition have been systematically studied. Thin film carbon on Si (111) has been deposited using DC Unbalanced Magnetron Sputtering with carbon pellet doped by 5% Fe as the target. EDAX characterization confirmed that the carbon fraction on Si substrate much higher by dipping a clean Si substrate by HF solution before sputtering process in comparison with carbon fraction on Si substrate just after conventional RCA. Moreover, SEM and AFM images show the uniform thin film carbon on Si with HF treatment, in contrast to the Si without HF solution treatment. These experimental results suggest that HF treatment of Si surface provide Si-H bonds on top Si surface that useful to enhance the carbon deposition during sputtering process. Furthermore, we investigate the thermal stability of thin film carbon on Si by thermal annealing process up to 900 °C. Atomic arrangements during annealing process were characterized by Raman spectroscopy. Raman spectra indicate that thin film carbon on Si is remaining unchanged until 600 °C and carbon atoms start to diffuse toward Si substrate after annealing at 900 °C.

Aji, A. S., E-mail: aji.ravazes70@gmail.com; Darma, Y., E-mail: aji.ravazes70@gmail.com [Quantum Semiconductor and Devices Lab., Physics of Material Electronics Research Division, Department of Physics, Institut Teknologi Bandung (Indonesia)

2014-03-24T23:59:59.000Z

13

High efficiency resonant dc/dc converter for solar power applications  

E-Print Network [OSTI]

This thesis presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage switching and near zero current switching across ...

Inam, Wardah

2013-01-01T23:59:59.000Z

14

Internal resistance variances in lithium-ion batteries and implications in manufacturing  

E-Print Network [OSTI]

This thesis addresses issues in manufacturing that lead to cell DC internal resistance (DCIR) variance, provides an overview of generally accepted cell degradation mechanisms and modeling techniques associated with IR as ...

Gogoana, Radu

2012-01-01T23:59:59.000Z

15

Improved DC Gun Insulator  

SciTech Connect (OSTI)

Many user facilities such as synchrotron light sources and free electron lasers require accelerating structures that support electric fields of 10-100 MV/m, especially at the start of the accelerator chain where ceramic insulators are used for very high gradient DC guns. These insulators are difficult to manufacture, require long commissioning times, and have poor reliability, in part because energetic electrons bury themselves in the ceramic, creating a buildup of charge and causing eventual puncture. A novel ceramic manufacturing process is proposed. It will incorporate bulk resistivity in the region where it is needed to bleed off accumulated charge caused by highly energetic electrons. This process will be optimized to provide an appropriate gradient in bulk resistivity from the vacuum side to the air side of the HV standoff ceramic cylinder. A computer model will be used to determine the optimum cylinder dimensions and required resistivity gradient for an example RF gun application. A ceramic material example with resistivity gradient appropriate for use as a DC gun insulator will be fabricated by glazing using doping compounds and tested.

M.L. Neubauer, K.B. Beard, R. Sah, C. Hernandez-Garcia, G. Neil

2009-05-01T23:59:59.000Z

16

Bi-directional dc-dc Converter  

Broader source: Energy.gov (indexed) [DOE]

MTBF Dc-dc Fabrication Validation Data Performance Validation BOM and Cost analysis EMIEMC Custom Components Fabrication Components Validation Vehicle System Review Phase-I...

17

Karst characterization in a semi-arid region using gravity, seismic, and resistivity geophysical techniques.  

SciTech Connect (OSTI)

We proposed to customize emerging in situ geophysical monitoring technology to generate time-series data during sporadic rain events in a semi-arid region. Electrodes were to be connected to wireless %5Cnodes%22 which can be left in the eld for many months. Embedded software would then increase sampling frequency during periods of rainfall. We hypothesized that this contrast between no-volume ow in karst passageways dur- ing dry periods and partial- or saturated-volume ow during a rain event is detectable by these Wireless Sensor Network (WSN) geophysical nodes, we call this a Wireless Resistivity Network (WRN). The development of new methodologies to characterize semi-arid karst hydrology is intended to augment Sandia National Laboratorys mission to lead e orts in energy technologies, waste disposal and climate security by helping to identify safe and secure regions and those that are at risk. Development and initial eld testing identi ed technological barriers to using WRNs for identifying semi-arid karst, exposing R&D which can be targeted in the future. Gravity, seismic, and resis- tivity surveys elucidated how each technique might e ectively be used to characterize semi-arid karst. This research brings to light the importance and challenges with char- acterizing semi-arid karst through a multi-method geophysical study. As there have been very few studies with this emphasis, this study has expanded the body of practical experience needed to protect the nations water and energy security interests.

Barnhart, Kevin Scott

2013-10-01T23:59:59.000Z

18

Insulating and sheathing materials of electric and optical cables - Common test methods - Part 5-1: Methods specific to filling compounds - Drop-point - Separation of oil - Lower temperature brittleness - Total acid number - Absence of corrosive components - Permittivity at 23 °C - DC resistivity at 23 °C and 100 °C  

E-Print Network [OSTI]

Specifies the test methods for filling compounds of electric cables used with telecommunication equipment. Gives the methods for drop-point, separation of oil, lower temperature brittleness, total acid number, absence of corrosive components, permittivity at 23 °C, d.c. resistivity at 23°C and 100°C.

International Electrotechnical Commission. Geneva

2004-01-01T23:59:59.000Z

19

Graphite electrode DC arc furnace. Innovative technology summary report  

SciTech Connect (OSTI)

The Graphite Electrode DC Arc Furnace (DC Arc) is a high-temperature thermal process, which has been adapted from a commercial technology, for the treatment of mixed waste. A DC Arc Furnace heats waste to a temperature such that the waste is converted into a molten form that cools into a stable glassy and/or crystalline waste form. Hazardous organics are destroyed through combustion or pyrolysis during the process and the majority of the hazardous metals and radioactive components are incorporated in the molten phase. The DC Arc Furnace chamber temperature is approximately 593--704 C and melt temperatures are as high as 1,500 C. The DC Arc system has an air pollution control system (APCS) to remove particulate and volatiles from the offgas. The advantage of the DC Arc is that it is a single, high-temperature thermal process that minimizes the need for multiple treatment systems and for extensive sorting/segregating of large volumes of waste. The DC Arc has the potential to treat a wide range of wastes, minimize the need for sorting, reduce the final waste volumes, produce a leach resistant waste form, and destroy organic contaminants. Although the DC arc plasma furnace exhibits great promise for treating the types of mixed waste that are commonly present at many DOE sites, several data and technology deficiencies were identified by the Mixed Waste Focus Area (MWFA) regarding this thermal waste processing technique. The technology deficiencies that have been addressed by the current studies include: establishing the partitioning behavior of radionuclides, surrogates, and hazardous metals among the product streams (metal, slag, and offgas) as a function of operating parameters, including melt temperature, plenum atmosphere, organic loading, chloride concentration, and particle size; demonstrating the efficacy of waste product removal systems for slag and metal phases; determining component durability through test runs of extended duration, evaluating the effect of feed composition variations on process operating conditions and slag product performance; and collecting mass balance and operating data to support equipment and instrument design.

NONE

1999-05-01T23:59:59.000Z

20

Resistivity measurements of iodine single crystals by an A.C. technique  

E-Print Network [OSTI]

are organic semi- conductors. Inokuchi and Akamatu and Garrett have investigated the electrical properties of several of these semiconductors and have also summarized the re- suits of much of the work that has been done on these materials up to 1961. Be... as the resistance increases, the accuracy is better than 10% in the resistance range of 10 ohms with a capacitance of 10 pF across the sample. If the capacitance is decreased by trimming the bridge before electrodes are con- nected to the sample to rule out all...

Intararithi, Thanom

1965-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Highly Attrition Resistant Zinc Oxide-Based Sorbents for H2S Removal by Spray Drying Technique  

SciTech Connect (OSTI)

Primary issues for the fluidized-bed/transport reactor process are high attrition resistant sorbent, its high sorption capacity and regenerability, durability, and cost. The overall objective of this project is the development of a superior attrition resistant zinc oxide-based sorbent for hot gas cleanup in integrated coal gasification combined cycle (IGCC). Sorbents applicable to a fluidized-bed hot gas desulfurization process must have a high attrition resistance to withstand the fast solid circulation between a desulfurizer and a regenerator, fast kinetic reactions, and high sulfur sorption capacity. The oxidative regeneration of zinc-based sorbent usually initiated at greater than 600 C with highly exothermic nature causing deactivation of sorbent as well as complication of sulfidation process by side reaction. Focusing on solving the sorbent attrition and regenerability of zinc oxide-based sorbent, we have adapted multi-binder matrices and direct incorporation of regeneration promoter. The sorbent forming was done with a spray drying technique that is easily scalable to commercial quantity.

Ryu, C.K.; Lee, J.B.; Ahn, D.H.; Kim, J.J.; Yi, C.K.

2002-09-19T23:59:59.000Z

22

DC source assemblies  

DOE Patents [OSTI]

Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.

Campbell, Jeremy B; Newson, Steve

2013-02-26T23:59:59.000Z

23

Advanced Testing Techniques to Measure the PWSCC Resistance of Alloy 690 and its Weld Metals  

SciTech Connect (OSTI)

Wrought Alloy 600 and its weld metals (Alloy 182 and Alloy 82) were originally used in pressurized water reactors (PWRs) due to the material's inherent resistance to general corrosion in a number of aggressive environments and because of a coefficient of thermal expansion that is very close to that of low alloy and carbon steel. Over the last thirty years, stress corrosion cracking in PWR primary water (PWSCC) has been observed in numerous Alloy 600 component items and associated welds, sometimes after relatively long incubation times. The occurrence of PWSCC has been responsible for significant downtime and replacement power costs. As part of an ongoing, comprehensive program involving utilities, reactor vendors and engineering/research organizations, this report will help to ensure that corrosion degradation of nickel-base alloys does not limit service life and that full benefit can be obtained from improved designs for both replacement components and new reactors.

P.Andreson

2004-10-01T23:59:59.000Z

24

Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings  

E-Print Network [OSTI]

Appliance type Standard technology DC-internal best technology Lighting Incandescent, fluorescent, LED Incandescent Electronic Heating Heater Electric resistance Cooling Motor (& compressor,

Garbesi, Karina

2012-01-01T23:59:59.000Z

25

Building Scale DC Microgrids  

E-Print Network [OSTI]

resources, a 10 kW vertical axis wind turbine, and Fig. 4AC-grid Fig. 3. Vertical axis wind turbine in the AIT DC µ

Marnay, Chris

2013-01-01T23:59:59.000Z

26

Building Scale DC Microgrids  

E-Print Network [OSTI]

resources, a 10 kW vertical axis wind turbine, and Fig. 4the µgrid Fig. 3. Vertical axis wind turbine in the AIT DC µ

Marnay, Chris

2014-01-01T23:59:59.000Z

27

RES D.C.  

Broader source: Energy.gov [DOE]

RES DC, hosted by the National Center for American Indian Enterprise Development (The National Center), will feature access to respected tribal leaders, members of congress, federal agency...

28

Telluric and D.C. Resistivity Techniques Applied to the Geophysical Investigation of Basin and Range Geothermal Systems, Part III: The Analysis of Data From Grass Valley, Nevada  

E-Print Network [OSTI]

kg). The generator is powered through a step-up V-belt driveof the generator goes into a 3-phase step-up transformer

Beyer, J.H.

2010-01-01T23:59:59.000Z

29

The effect of radon-resistant construction techniques in a crawlspace house  

SciTech Connect (OSTI)

An extensive battery of radon-diagnostic tests were performed on two different houses built on the SAME foundation. A house was studied as part of a multi-year evaluation of radon mitigation measures in the Tennessee Valley. The original house was destroyed in a fire caused by a faulty space heater. The second house was built on the same foundation using passive techniques to reduce radon transport via the crawlspace to the living area. The rebuilt house achieved a 60% reduction in the volumetric transport of air from crawlspace to living area when the heating and cooling system was not operating. An even greater reduction was found when the HAC system was operating, reflecting the benefits of new, well-sealed ductwork. In spite of these enhancements, the passive measures failed to reduce radon concentrations to below 4 pCi/L. The primary reason is believed to be the enclosure of the open carport to form a garage at the time of reconstruction.

Dudney, C S; Wilson, D L [Oak Ridge National Lab., TN (United States)] [Oak Ridge National Lab., TN (United States); Dyess, T M [US Environmental Protection Agency, Air & Energy Engineering Research Lab., Research Triangle Park, NC (United States)] [US Environmental Protection Agency, Air & Energy Engineering Research Lab., Research Triangle Park, NC (United States)

1992-09-01T23:59:59.000Z

30

DC attenuation meter  

DOE Patents [OSTI]

A portable, hand-held meter used to measure direct current (DC) attenuation in low impedance electrical signal cables and signal attenuators. A DC voltage is applied to the signal input of the cable and feedback to the control circuit through the signal cable and attenuators. The control circuit adjusts the applied voltage to the cable until the feedback voltage equals the reference voltage. The "units" of applied voltage required at the cable input is the system attenuation value of the cable and attenuators, which makes this meter unique. The meter may be used to calibrate data signal cables, attenuators, and cable-attenuator assemblies.

Hargrove, Douglas L.

2004-09-14T23:59:59.000Z

31

Multiplatform Dynamic System Simulation of a DC-DC Converter.  

E-Print Network [OSTI]

??The work presented in this paper focuses on the usability testing for the Open-Modelica. The modeling and simulation of the BMR450 DC-DC converter is also… (more)

Song, Wenpeng

2012-01-01T23:59:59.000Z

32

A global maximum power point tracking DC-DC converter  

E-Print Network [OSTI]

This thesis describes the design, and validation of a maximum power point tracking DC-DC converter capable of following the true global maximum power point in the presence of other local maximum. It does this without the ...

Duncan, Joseph, 1981-

2005-01-01T23:59:59.000Z

33

DC arc weld starter  

DOE Patents [OSTI]

A system for starting an arc for welding uses three DC power supplies, a high voltage supply for initiating the arc, an intermediate voltage supply for sustaining the arc, and a low voltage welding supply directly connected across the gap after the high voltage supply is disconnected.

Campiotti, Richard H. (Tracy, CA); Hopwood, James E. (Oakley, CA)

1990-01-01T23:59:59.000Z

34

Stabilization of unstable periodic orbits in dc drives  

E-Print Network [OSTI]

Electric drive using dc shunt motor or permanent magnet dc (PMDC) motor as prime mover exhibits bifurcation and chaos. The characteristics of dc shunt and PMDC motors are linear in nature. These motors are controlled by pulse width modulation (PWM) technique with the help of semiconductor switches. These switches are nonlinear element that introduces nonlinear characteristics in the drive. Any nonlinear system can exhibit bifurcation and chaos. dc shunt or PMDC drives show normal behavior with certain range of parameter values. It is also observed that these drive show chaos for significantly large ranges of parameter values. In this paper we present a method for controlling chaos applicable to dc shunt and PMDC drives. The results of numerical investigation are presented.

Krishnendu Chakrabarty; Urmila Kar

2014-02-22T23:59:59.000Z

35

Design and implementation of a scalable encryption processor with embedded variable dc/dc converter  

E-Print Network [OSTI]

This work describes the design and implementation of an energy-efficient, scalable encryption processor that utilizes variable voltage supply techniques and a highefficiency embedded variable output DC/DC converter. The resulting implementation dissipates 134nJ/bit @ V DD = 2.5V, when encrypting at its maximum rate of 1Mb/s using a maximum datapath width of 512 bits. The embedded converter achieves an efficiency of 96 % at this peak load. The processor is 2-3 orders of magnitude more energy efficient than optimized assembly code running on a low-power processor such as the StrongARM. 2.

James Goodman; Anantha Chandrakasan; Abram P. Dancy

1999-01-01T23:59:59.000Z

36

Methods for detecting and locating leaks in containment facilities using electrical potential data and electrical resistance tomographic imaging techniques  

DOE Patents [OSTI]

Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid though the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution. 6 figs.

Daily, W.D.; Laine, D.L.; Laine, E.F.

1997-08-26T23:59:59.000Z

37

Methods for detecting and locating leaks in containment facilities using electrical potential data and electrical resistance tomographic imaging techniques  

DOE Patents [OSTI]

Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid though the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution.

Daily, William D. (Livermore, CA); Laine, Daren L. (San Antonio, TX); Laine, Edwin F. (Alamo, CA)

1997-01-01T23:59:59.000Z

38

Methods for detecting and locating leaks in containment facilities using electrical potential data and electrical resistance tomographic imaging techniques  

DOE Patents [OSTI]

Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner or between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid through the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution.

Daily, William D. (Livermore, CA); Laine, Daren L. (San Anotonio, TX); Laine, Edwin F. (Penn Valley, CA)

2001-01-01T23:59:59.000Z

39

Use of Geophysical Techniques to Characterize Fluid Flow in a...  

Broader source: Energy.gov (indexed) [DOE]

14 | US DOE Geothermal Program eere.energy.gov Future Directions *3D DC resistivity tomography of a volcano (Revil, Johnson and Finizola, in preparation) * Passive seismic *...

40

Auxiliary resonant DC tank converter  

DOE Patents [OSTI]

An auxiliary resonant dc tank (ARDCT) converter is provided for achieving soft-switching in a power converter. An ARDCT circuit is coupled directly across a dc bus to the inverter to generate a resonant dc bus voltage, including upper and lower resonant capacitors connected in series as a resonant leg, first and second dc tank capacitors connected in series as a tank leg, and an auxiliary resonant circuit comprising a series combination of a resonant inductor and a pair of auxiliary switching devices. The ARDCT circuit further includes first clamping means for holding the resonant dc bus voltage to the dc tank voltage of the tank leg, and second clamping means for clamping the resonant dc bus voltage to zero during a resonant period. The ARDCT circuit resonantly brings the dc bus voltage to zero in order to provide a zero-voltage switching opportunity for the inverter, then quickly rebounds the dc bus voltage back to the dc tank voltage after the inverter changes state. The auxiliary switching devices are turned on and off under zero-current conditions. The ARDCT circuit only absorbs ripples of the inverter dc bus current, thus having less current stress. In addition, since the ARDCT circuit is coupled in parallel with the dc power supply and the inverter for merely assisting soft-switching of the inverter without participating in real dc power transmission and power conversion, malfunction and failure of the tank circuit will not affect the functional operation of the inverter; thus a highly reliable converter system is expected.

Peng, Fang Z. (Knoxville, TN)

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Power flow analysis for DC voltage droop controlled DC microgrids  

E-Print Network [OSTI]

loss, such as photovoltaic panels, batteries, fuel cells, LEDs, and electronic loads, DC microgrids sharing and secondary voltage regulation can now be analytically studied, and specialized optimization of the DC microgrid, in term of systematic analysis, protection coordination design, network optimization

Chaudhary, Sanjay

42

Triple voltage dc-to-dc converter and method  

DOE Patents [OSTI]

A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing the gating signals to power semiconductor switches in the primary and secondary circuits to control power flow between the primary and secondary circuits and by controlling a phase shift between the primary voltage and the secondary voltage. The primary dc power circuit and the secondary dc power circuit each further comprising at least two tank capacitances arranged in series as a tank leg, at least two resonant switching devices arranged in series with each other and arranged in parallel with the tank leg, and at least one voltage source arranged in parallel with the tank leg and the resonant switching devices, said resonant switching devices including power semiconductor switches that are operated by gating signals. Additional embodiments having a center-tapped battery on the low voltage side and a plurality of modules on both the low voltage side and the high voltage side are also disclosed for the purpose of reducing ripple current and for reducing the size of the components.

Su, Gui-Jia (Knoxville, TN)

2008-08-05T23:59:59.000Z

43

Catalog of DC Appliances and Power Systems  

E-Print Network [OSTI]

Appliance Efficient DC compatible replacement technology variable-speed compressor and fans run by brushless DC motor in place of single-speed compressors

Garbesi, Karina

2012-01-01T23:59:59.000Z

44

Bi-Directional DC-DC Converter for PHEV Applications  

SciTech Connect (OSTI)

Plug-In Hybrid Electric Vehicles (PHEV) require high power density energy storage system (ESS) for hybrid operation and high energy density ESS for Electric Vehicle (EV) mode range. However, ESS technologies to maximize power density and energy density simultaneously are not commercially feasible. The use of bi-directional DC-DC converter allows use of multiple energy storage, and the flexible DC-link voltages can enhance the system efficiency and reduce component sizing. This will improve fuel consumption, increase the EV mode range, reduce the total weight, reduce battery initial and life cycle cost, and provide flexibility in system design.

Abas Goodarzi

2011-01-31T23:59:59.000Z

45

Catalog of DC Appliances and Power Systems  

SciTech Connect (OSTI)

This document catalogs the characteristics of current and potential future DC products and power systems.

Garbesi, Karina; Vossos, Vagelis; Shen, Hongxia

2010-10-13T23:59:59.000Z

46

Switching coordination of distributed dc-dc converters for highly efficient photovoltaic power plants  

DOE Patents [OSTI]

A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant.

Agamy, Mohammed; Elasser, Ahmed; Sabate, Juan Antonio; Galbraith, Anthony William; Harfman Todorovic, Maja

2014-09-09T23:59:59.000Z

47

Light-weight DC to very high voltage DC converter  

DOE Patents [OSTI]

A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current.

Druce, Robert L. (Union City, CA); Kirbie, Hugh C. (Dublin, CA); Newton, Mark A. (Livermore, CA)

1998-01-01T23:59:59.000Z

48

Light-weight DC to very high voltage DC converter  

DOE Patents [OSTI]

A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current. 1 fig.

Druce, R.L.; Kirbie, H.C.; Newton, M.A.

1998-06-30T23:59:59.000Z

49

Nonlinear modal interaction in HVDC/AC power systems with dc power modulation  

SciTech Connect (OSTI)

In this paper investigation of nonlinear modal interaction using the normal form of vector fields technique is extended to HVDC/AC power systems with dc power modulation. The ac-dc interface equations are solved to form a state space model with second order approximation. Using the normal form technique, the system`s nonlinear dynamic characteristics are obtained. The proposed approach is applied to a 4-generator HVDC/AC test power system, and compare with the time domain solution.

Ni, Y.X. [Tsinghua Univ., Beijing (China)] [Tsinghua Univ., Beijing (China); Vittal, V.; Kliemann, W.; Fouad, A.A. [Iowa State Univ., Ames, IA (United States)] [Iowa State Univ., Ames, IA (United States)

1996-11-01T23:59:59.000Z

50

AC and DC power transmission  

SciTech Connect (OSTI)

The technical and economic assessment of AC and DC transmission systems; long distance transmission, cable transmission, system inter-connection, voltage support, reactive compensation, stabilisation of systems; parallel operation of DC links with AC systems; comparison between alternatives for particular schemes. Design and application equipment: design, testing and application of equipment for HVDC, series and shunt static compensated AC schemes, including associated controls. Installations: overall design of stations and conductor arrangements for HVDC, series and shunt static AC schemes including insulation co-ordination. System analysis and modelling.

Not Available

1985-01-01T23:59:59.000Z

51

DC to DC power converters and methods of controlling the same  

DOE Patents [OSTI]

A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output section of the first DC to DC converter is coupled in series with the first power generation unit. The first DC to DC converter is configured to process a first portion of the DC power output by the first power generation unit and to provide an unprocessed second portion of the DC power output of the first power generation unit to the output section.

Steigerwald, Robert Louis; Elasser, Ahmed; Sabate, Juan Antonio; Todorovic, Maja Harfman; Agamy, Mohammed

2012-12-11T23:59:59.000Z

52

Catalog of DC Appliances and Power Systems  

E-Print Network [OSTI]

DC solar-powered DC air-conditioning heat pump produced byRoom Air Conditioners Geothermal Heat Pumps Lighting-efficiency of an air source electric heat-pump water heater

Garbesi, Karina

2012-01-01T23:59:59.000Z

53

DC systems with transformerless converters  

SciTech Connect (OSTI)

A technical and economic feasibility study of HVDC systems without converter transformers is presented. The presentation includes proposed solutions to the drawback related to the absence of galvanic separation between the ac and dc systems, if the converter transformers are eliminated. The results show that HVDC systems without converter transformers are both technically and economically feasible. The cost savings can be substantial.

Vithayathil, J.J.; Mittlestadt, W. [Bonneville Power Administration, Portland, OR (United States)] [Bonneville Power Administration, Portland, OR (United States); Bjoerklund, P.E. [ABB Power Systems AB, Ludvika (Sweden)] [ABB Power Systems AB, Ludvika (Sweden)

1995-07-01T23:59:59.000Z

54

1/3 TELLURIC AND D.C. RESISTIVITY TECHNIQUES APPLIED TO THE GEOPHYSICAL INVESTIGATION OF BASIN AND RANGE GEOTHERMAL SYSTEMS, PART I: THE E-FIELD RATIO TELLURIC METHOD  

E-Print Network [OSTI]

probing, and the 8 Hz Schumann resonance band (filters setto high amplitude resonances, the Schumann re~onances, at 8

Beyer, J.H.

2010-01-01T23:59:59.000Z

55

Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications  

E-Print Network [OSTI]

Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications Sairaj V performance and reliability analysis of switch-mode, dc-dc power converters employed as front ends of the converter's steady-state operation on device failure rates. Markov reliability models are derived to assess

Liberzon, Daniel

56

Design and development of a DC-DC converter for a fuel cell inverter system  

E-Print Network [OSTI]

This thesis outlines the design and development of a DC-DC converter for a fuel cell inverter application. The proposed DC-DC converter was designed and tested at Texas A&M to meet the specifications laid down for the '2001 Future Energy Challenge...

Gopinath, Rajesh

2001-01-01T23:59:59.000Z

57

DC WRRC Report No. 92 Directory of University Water  

E-Print Network [OSTI]

DC WRRC Report No. 92 Directory of University Water Expertise in the District of Columbia DC Water Avenue, NW Washington, DC 20008 #12;DC WRRC Report No. 92 Directory of University Water Expertise of Columbia 4200 Connecticut Avenue, NW Washington, DC 20008 #12;DC-WRRC Report No. 92 DIRECTORY OF UNIVERSITY

District of Columbia, University of the

58

Previously, DC Magnets located at Neutron-Scattering Beamlines were commercially-manufactured superconducting magnets and limited to 17 T. A  

E-Print Network [OSTI]

Previously, DC Magnets located at Neutron-Scattering Beamlines were commercially, this was the first designed specifically for neutron scattering and the first to include resistive suitable for neutron scattering, diffraction and spectroscopy experiments with the neutron beam passing

Weston, Ken

59

Modelling Foil Winding Configurations with Low AC and DC Resistance  

E-Print Network [OSTI]

shapes for distributed-gap cores are also introduced and shown to provide reduction in power loss. I can be explained by the equal distance from the end of each layer to the gap. The power loss the power loss determined by FEA. The power loss calculation was used in the size optimization method

60

DC Resistivity Survey (Schlumberger Array) At Roosevelt Hot Springs...  

Open Energy Info (EERE)

zones. References S. H. Ward, W. T. Parry, W. P. Nash, W. R. Sill, K. L. Cook, R. B. Smith, D. S. Chapman, F. H. Brown, J. A. Whelan, J. R. Bowman (1978) A Summary of the...

Note: This page contains sample records for the topic "technique dc resistivity" 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

DC Resistivity Survey (Schlumberger Array) At Raft River Geothermal Area  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) Jump to: navigation, search

62

DC Resistivity Survey (Schlumberger Array) At Roosevelt Hot Springs  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) Jump to: navigation, searchGeothermal

63

DC Resistivity Survey (Schlumberger Array) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) Jump to: navigation,

64

Category:DC Resistivity Survey (Wenner Array) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBostonFacilityCascade SierraStatus Status ofCoreInformation page? For

65

Weatherization Program is a Capital Idea for Washington, D.C.: Weatherization Assistance Close-Up Fact Sheet  

SciTech Connect (OSTI)

Washington, D.C. demonstrates its commitment to technology and efficiency through the Weatherization Program. Weatherization uses advanced technologies and techniques to reduce energy costs for low-income families by increasing the energy efficiency of their homes.

D& R International

2001-10-10T23:59:59.000Z

66

Active dc filter for HVDC systems  

SciTech Connect (OSTI)

This article is a case history of the installation of active dc filters for high-performance, low-cost harmonics filtering at the Lindome converter station in the Konti-Skan 2 HVDC transmission link between Denmark and Sweden. The topics of the article include harmonics, interference, and filters, Lindome active dc filter, active dc filter design, digital signal processor, control scheme, protection and fault monitoring, and future applications.

Zhang, W. (Royal Inst. of Tech., Stockholm (Sweden)); Asplund, G.

1994-01-01T23:59:59.000Z

67

New Architectures for Radio-Frequency DC-DC Power Conversion  

E-Print Network [OSTI]

This document proposes two new architectures for switched-mode dc–dc power conversion. The proposed architectures enable dramatic increases in switching frequency to be realized while preserving features critical in practice, ...

Rivas, Juan M.

68

DC to DC power conversion module for the all-electric ship  

E-Print Network [OSTI]

The MIT end to end electric ship model is being developed to study competing electric ship designs. This project produced a model of a Power Conversion Module (PCM)- 4, DC-to-DC converter which interfaces with the MIT ...

Gray, Weston L

2011-01-01T23:59:59.000Z

69

Computer-aided optimization of DC/DC converters for automotive applications  

E-Print Network [OSTI]

This paper investigates computer-aided optimization of DC/DC converters, with a focus on converters for dual-voltage automotive electrical systems. A new CAD optimization approach based on Monte Carlo search methods is ...

Neugebauer, Timothy C.

70

Program stat3d.c /* Program: stat3d.c */  

E-Print Network [OSTI]

85 Program stat3d.c /************************************************************************/ /* */ /* Program: stat3d.c */ /* Purpose: To read in a 3-D image and output phase volumes */ /* and report("Phase Volume Surface Volume Surface \

Bentz, Dale P.

71

Catalog of DC Appliances and Power Systems  

E-Print Network [OSTI]

48V DC , depending on battery bank configuration. Lifetime:Characteristics: Lead-acid battery banks are composed ofto produce the desired battery bank voltage. Typical battery

Garbesi, Karina

2012-01-01T23:59:59.000Z

72

26 Tesla DC Magnet for Neutron Scattering  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Previously, DC Magnets located at Neutron-Scattering Beamlines were commercially-manufactured superconducting magnets and limited to 17 T. A few pulsed magnet systems have been...

73

DC-based magnetic field controller  

DOE Patents [OSTI]

A magnetic field controller for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage.

Kotter, Dale K. (Shelley, ID); Rankin, Richard A. (Ammon, ID); Morgan, John P,. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

74

DC-based magnetic field controller  

DOE Patents [OSTI]

A magnetic field controller is described for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a Hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage. 1 fig.

Kotter, D.K.; Rankin, R.A.; Morgan, J.P.

1994-05-31T23:59:59.000Z

75

High voltage DC power supply  

DOE Patents [OSTI]

A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively. 7 figs.

Droege, T.F.

1989-12-19T23:59:59.000Z

76

High voltage DC power supply  

DOE Patents [OSTI]

A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively.

Droege, Thomas F. (Batavia, IL)

1989-01-01T23:59:59.000Z

77

DC Microgrids Scoping Study: Estimate of Technical and Economic...  

Energy Savers [EERE]

manufacturers, power system designers, and researchers are demonstrating and deploying DC power distribution systems for applications where the end-use loads are natively DC, e.g.,...

78

INL Efficiency and Security Testing of EVSE, DC Fast Chargers...  

Broader source: Energy.gov (indexed) [DOE]

INL Efficiency and Security Testing of EVSE, DC Fast Chargers, and Wireless Charging Systems INL Efficiency and Security Testing of EVSE, DC Fast Chargers, and Wireless Charging...

79

Summary of electric vehicle dc motor-controller tests  

SciTech Connect (OSTI)

Available performance data for production motors are usually of marginal value to the electric vehicle designer. To provide at least a partial remedy to this situation, tests of typical dc propulsion motors and controllers were conducted as part of the DOE Electric Vehicle Program. The objectives of this program were to evaluate the differences in the performance of dc motors when operating with chopper-type controllers and when operating on direct current; and to gain an understanding of the interactions between the motor and the controller which cause these differences. Toward this end, motor-controller tests performed by the NASA Lewis Research Center provided some of the first published data that quantified motor efficiency variations for both ripple-free (straight dc) and chopper modes of operation. Test and analysis work at the University of Pittsburgh explored motor-controller relationships in greater depth. And to provide additional data, 3E Vehicles tested two small motors, both on a dynamometer and in a vehicle, and the Eaton Corporation tested larger motors, using sophisticated instrumentation and digital processing techniques. All the motors tested were direct-current types. Of the separately excited types, seven were series wound and two were shunt wound. One self-excited permanent magnet type was also tested. Four of the series wound motors used brush shifting to obtain good commutation. In almost all cases, controller limitations constrained the test envelope so that the full capability of the motors could not be explored.

McBrien, E F; Tryon, H B

1982-09-01T23:59:59.000Z

80

High Precision Load Current Sensing using On-Line Calibration of Trace Resistance  

E-Print Network [OSTI]

-line specification. This and high-bandwidth measurement of the load current in the allows the converter to follow pose unprecedented demands on DC-DC power converters, it could be very difficult to follow the loadHigh Precision Load Current Sensing using On-Line Calibration of Trace Resistance in VRM

Sanders, Seth

Note: This page contains sample records for the topic "technique dc resistivity" 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

National Aeronautics and Space Administration Washington, DC  

E-Print Network [OSTI]

National Aeronautics and Space Administration Washington, DC NASA ADVISORY COUNCIL PLANETARY, including Discovery @15 and Satellites of the Outer Solar System. The next workshop, Planetary Atmospheres (GRAIL)--a lunar mission, Origins Spectral Interpretation, Resource Identification, and Security (OSIRIS

Rathbun, Julie A.

82

DC readout experiment in Enhanced LIGO  

E-Print Network [OSTI]

The two 4 km long gravitational wave detectors operated by the Laser Interferometer Gravitational-wave Observatory (LIGO) were modified in 2008 to read out the gravitational wave channel using the DC readout form of homodyne ...

Fricke, Tobin T

83

Hydrogen Storage Systems Analysis Working Group Meeting Argonne DC Offices  

E-Print Network [OSTI]

Hydrogen Storage Systems Analysis Working Group Meeting Argonne DC Offices L'Enfant Plaza, Washington, DC December 4, 2007 SUMMARY REPORT Compiled by Romesh Kumar Argonne National Laboratory Working Group Meeting December 4, 2007 Argonne DC Offices, L'Enfant Plaza, Washington, DC Meeting

84

DC WRRC Report No. 142 Directory of University Water Expertise  

E-Print Network [OSTI]

DC WRRC Report No. 142 Directory of University Water Expertise in the District of Columbia r DC.B. 5004 Washington, D.C. 20008 #12;DC WRRC Report No. 142 Directory of University Water Expertise ............ 26 FACULTY INDEX .......................................... 29 DIRECTORY UPDATE FORM

District of Columbia, University of the

85

Phase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating Current  

E-Print Network [OSTI]

of the switch conduction and turn-off losses achieved by an energy recovery secondary clamp circuit an improved PSFB DC-DC converter using only a modified energy recovery clamp circuit attached at the secondaryPhase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating

86

FC/Battery Power Management for Electric Vehicle Based Interleaved dc-dc Boost Converter Topology  

E-Print Network [OSTI]

FC/Battery Power Management for Electric Vehicle Based Interleaved dc- dc Boost Converter Topology power systems in electric vehicle application, in order to decrease the FC current ripple. Therefore the performance of the FC system during transient and instantaneous peak power demands in electric vehicle

Paris-Sud XI, Université de

87

A study of contact resistance as applied to resistance commutation of D.C. dynamos  

E-Print Network [OSTI]

voltage drop. The K volt- age varies with the pressure as seen from the ]AC"BA-45 curves. This voltage has a simple harmonic behavior when the brushes are operated at pressures between 3 and 5 psi. The H voltage has the characteristics of an arc.... INTRODUCTION Many early investigators cited the close relation- ship between the volt aspera characteristics of brush contacts 112 and the volt aapere characteristics oi electrical arcs. This led to the theory that all of the current is carried across...

Little, Leroy Eugene

1959-01-01T23:59:59.000Z

88

New Experimental Data in DC745U  

SciTech Connect (OSTI)

The objectives of this project are: (1) study the molecular and mechanical properties of DC745U - (a) DC745U is a silicone elastomer used in several weapons systems, (b) depending on their chemistry and formulation, polymers can be susceptible to damage and failures due to weak chemical linkages and physical interactions, (c) inefficient production processes can generate heterogeneities throughout the material that can contribute negatively to the overall performance and lifetime of the polyer, (d) aging, long-term thermal and radioactive conditions, and mechanical strains can affect the materials network structure and contribute to the degradation of the production; (2) characterization of DC745U materials cured under different conditions to determine possible differences to the polymer structure; and (3) this work is relevant to mission-critical programs and for supporting programmatic work for weapon research.

Ortiz-Acosta, Denisse [Los Alamos National Laboratory; Cady, Carl [Los Alamos National Laboratory; Densmore, Crystal [Los Alamos National Laboratory

2012-06-18T23:59:59.000Z

89

DC High School Science Bowl Regionals | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

DC High School Science Bowl Regionals DC High School Science Bowl Regionals February 22, 2014 1:15PM to 8:15PM EST Department of Energy headquarters - 1000 Independence Ave SW,...

90

National Science Bowl Brings Best and Brightest to DC | Department...  

Broader source: Energy.gov (indexed) [DOE]

National Science Bowl Brings Best and Brightest to DC National Science Bowl Brings Best and Brightest to DC April 24, 2012 - 11:14am Addthis The National Science Bowl is the...

91

National Small Business Federal Contracting Summit-DC Fall Conference...  

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

National Small Business Federal Contracting Summit-DC Fall Conference National Small Business Federal Contracting Summit-DC Fall Conference November 6, 2014 8:00AM to 4:00PM EST...

92

Federal Government Congressional Budget Office, Budget Analysis Division Washington, DC  

E-Print Network [OSTI]

Administration, Center for Drug Evaluation and Research Washington, DC Federal Energy Regulatory CommissionFederal Government Congressional Budget Office, Budget Analysis Division Washington, DC Department Environmental Protection Agency, Office of Transportation & Air Quality Ann Arbor, MI Federal Drug

Shyy, Wei

93

achyrocline satureioides dc: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and DC, microgrid, with its definition as a local grid that comprises distributed generation, energy storage systems to the frequency in the AC bulk grid, the DC voltage in the...

94

Halbach array DC motor/generator  

DOE Patents [OSTI]

A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.

Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA); Post, Richard F. (Walnut Creek, CA)

1998-01-01T23:59:59.000Z

95

Halbach array DC motor/generator  

DOE Patents [OSTI]

A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An ``inside-out`` design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then ``switched`` or ``commutated`` to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives. 17 figs.

Merritt, B.T.; Dreifuerst, G.R.; Post, R.F.

1998-01-06T23:59:59.000Z

96

FEDERAL ENERGY WASHINGTON, D.C. 20426  

E-Print Network [OSTI]

FEDERAL ENERGY REGULATORY COMMISSION WASHINGTON, D.C. 20426 NEWS RELEASE NEWS MEDIA CONTACT judge, the Federal Energy Regulatory Commission today ordered an expedited fact-finding hearing of the discussions. #12;Chairman Curt L. Hébert, Jr. stated as follows: "At some point, regulatory and R-01-33 (more

Laughlin, Robert B.

97

Energy Training Session for DC Elementary School Teachers  

Broader source: Energy.gov [DOE]

Are you an elementary school teacher in Washington, DC, looking for creative ideas to introduce energy curriculum to your students?

98

A Three-Phase Bidirectional DC-DC Converter for Automotive Applications  

SciTech Connect (OSTI)

This paper presents a three-phase soft-switching, bidirectional dc-dc converter for high-power automotive applications. The converter employs dual three-phase active bridges and operates with a novel asymmetrical but fixed duty cycle for the top and bottom switches of each phase leg. Simulation and experimental data on a 6-kW prototype are included to verify the novel operating and power flow control principles.

Su, Gui-Jia [ORNL; Tang, Lixin [ORNL

2008-01-01T23:59:59.000Z

99

Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters  

E-Print Network [OSTI]

Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters Shafiee, Qobad Control for Multiple DC Microgrids Clusters. I E E E Transactions on Energy Conversion. General rights, J. C. Vasquez, and J. M. Guerrero, "Hierarchical Control for Multiple DC-Microgrids Clusters," IEEE

Vasquez, Juan Carlos

100

Transportation YOU 2013 DC Youth Summit WTS Transportation YOU  

E-Print Network [OSTI]

Transportation YOU 2013 DC Youth Summit WTS Transportation YOU CTS Research Conference May 21, 2014 Lisa Rasmussen, WTS / Kimley-Horn and Associates, Inc #12;Transportation YOU 2013 DC Youth SummitTransportation YOU 2013 DC Youth Summit Agenda What is Transportation YOU? Transportation YOU ­ WTS Local Chapter

Minnesota, University of

Note: This page contains sample records for the topic "technique dc resistivity" 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

A Cascade Multilevel Inverter Using a Single DC Source  

E-Print Network [OSTI]

A Cascade Multilevel Inverter Using a Single DC Source Zhong Du1, Leon M. Tolbert2 3, John N inverter can be implemented using only a single DC power source and capacitors. A standard cascade multilevel inverter requires DC sources for 2 + 1 levels. Without requiring transformers, the scheme proposed

Tolbert, Leon M.

102

SUBMITTED TO: THE D.C. WATER RESOURCES RESEARCH CENTER  

E-Print Network [OSTI]

chemicals and heavy metals such as lead'. Several published reports have suggested that D.C. public waterMARCH 1996 SUBMITTED TO: THE D.C. WATER RESOURCES RESEARCH CENTER UNIVERSITY OF THE DISTRICT OF COLUMBIA WASHINGTON, D.C. 20008 SUBMITTED BY: DR. KWAMENA OCRAN LEAD IN RESIDENTIAL DRINKING WATER: RISK

District of Columbia, University of the

103

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

104

DC side filters for multiterminal HVDC systems  

SciTech Connect (OSTI)

Multiterminal HVDC systems present challenges in the specification and design of suitable dc side filtering. This document examines the existing experience and addresses the particular technical problems posed by multiterminal systems. The filtering requirements of small taps are discussed, as is the potential use of active filters. Aspects of calculation and design are considered and recommendations made to guide the planners and designers of future multiterminal schemes.

Shore, N.L.; Adamson, K.; Bard, P. [and others] [and others

1996-10-01T23:59:59.000Z

105

Good Energies (Washington DC) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data CenterFranconia, Virginia: Energy Resources Jump to: navigation,Ohio: Energy Resources Jump to:GloriaGoldenGolden,CookWashington DC) Jump

106

Resistivity analysis  

DOE Patents [OSTI]

According to an example embodiment of the present invention a semiconductor die having a resistive electrical connection is analyzed. Heat is directed to the die as the die is undergoing a state-changing operation to cause a failure due to suspect circuitry. The die is monitored, and a circuit path that electrically changes in response to the heat is detected and used to detect that a particular portion therein of the circuit is resistive. In this manner, the detection and localization of a semiconductor die defect that includes a resistive portion of a circuit path is enhanced.

Bruce, Michael R. (Austin, TX); Bruce, Victoria J. (Austin, TX); Ring, Rosalinda M. (Austin, TX); Cole, Edward Jr. I. (Albuquerque, NM); Hawkins, Charles F. (Albuquerque, NM); Tangyungong, Paiboon (Albuquerque, NM)

2006-06-13T23:59:59.000Z

107

NOISE AND OPTIMIZATION OF THE dc SQUID  

E-Print Network [OSTI]

I o critical current of single Josephson junction.shunt resistance of single Josephson junction.capacitance of single Josephson junction. flux quantum, ~o R

Tesche, Claudia Denke

2011-01-01T23:59:59.000Z

108

DC-DC Converter Topology Assessment for Large Scale Distributed Photovoltaic Plant Architectures  

SciTech Connect (OSTI)

Distributed photovoltaic (PV) plant architectures are emerging as a replacement for the classical central inverter based systems. However, power converters of smaller ratings may have a negative impact on system efficiency, reliability and cost. Therefore, it is necessary to design converters with very high efficiency and simpler topologies in order not to offset the benefits gained by using distributed PV systems. In this paper an evaluation of the selection criteria for dc-dc converters for distributed PV systems is performed; this evaluation includes efficiency, simplicity of design, reliability and cost. Based on this evaluation, recommendations can be made as to which class of converters is best fit for this application.

Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Juan A. Sabate; Robert L. Steigerwald; Yan Jiang; Somasundaram Essakiappan

2011-07-01T23:59:59.000Z

109

Thermal conductivity, electrical resistivity, and permeability of saturated soils at various porosities  

E-Print Network [OSTI]

of Ottawa Sand . 4. Thermal Conductivity Data Analysis 5. Thermal Conductivity of Reference Materials 6. DC Resistivity Data with Plate Electrode System for Kaolinite at Porosity of 49% PAGE 48 52 54 66 71 AC Resistivity Data for Kaolinite... THERMAL CONDUCTIVITY, ELECTRICAL RESISTIVITY, AND PERMEABILITY OF SATURATED SOILS AT VARIOUS POROSITIES A Thesis by JAMES KEITH ENDERBY Submitted to the Graduate College of Texas ARM University in Partial fulfillment of the requirement...

Enderby, James Keith

2012-06-07T23:59:59.000Z

110

Dc's blog | OpenEI Community  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address:011-DNA Jump to:52c8ff988c1 No38e4011f618b No revision hasDawesCountyNewDc's blog Home

111

RES D.C. | Department of Energy  

Office of Environmental Management (EM)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr May Jun Jul(Summary) "of Energy Power.pdf11-161-LNG |September 15,2015 | DepartmentLoans |QuerylNuclear Power Plant DocketRES D.C.

112

Fun D.C. Jobs for Physicists  

SciTech Connect (OSTI)

Physicists make valuable contributions in a wide variety of careers, including those in Washington. Many national challenges, including energy, innovation, and security, create a demand for technically-competent individuals across government. Clark will discuss some of the many programs in D.C. designed to attract the best and brightest minds, from grad-students to professors, from short-term assignments to whole new careers. These are great opportunities to use your expertise and enrich your knowledge of the broader scientific enterprise, all while serving society.

Clark Cully

2009-09-30T23:59:59.000Z

113

User:Dc | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revisionEnvReviewNonInvasiveExplorationUT-gTagusparkCalculator JumpUnitedBeowaweColin.mccormick JumpDbowers JumpDc

114

Sandia National Laboratories: DC power optimizers  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared0EnergySandia Involves Wind-FarmCool EarthSafetyCzech RadioactiveDC

115

Wide input range DC-DC converter with digital control scheme  

E-Print Network [OSTI]

boost converter a battery or ultracapacitor energy storage is connected to take care of the fuel cell slow transient response (200 watts/min). The robust features of the proposed control system ensure a constant output DC voltage for a variety of load...

Harfman Todorovic, Maja

2006-04-12T23:59:59.000Z

116

XL-DC/Mark V Options You can customize the XL-DC and Mark V  

E-Print Network [OSTI]

administrator with the NTP Time Server Protocol, network status, and statistics. This feature implements SNMP. XL-DC Mark V Network Time Server Telecommunications Interface Frequency Measurement STD Time Interface Low Phase Noise Output Network Interface Loss of Lock Alarm STD Programmable Pulse Output

Berns, Hans-Gerd

117

Washington DC Reliability Requirements and the Need to Operate...  

Broader source: Energy.gov (indexed) [DOE]

Washington DC Reliability Requirements and the Need to Operate Mirant's Potomac River Generation Station to Support Local Area Reliability (Oak Ridge National Laboratory 2005)...

118

PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL LABORATORIES Jay Johnson 1 , Birger Pahl 2 , Charles Luebke 2 , Tom Pier 2 , Theodore Miller 3 , Jason Strauch 1 ,...

119

DC Bus Capacitor Manufacturing Facility for Electric Drive Vehicles...  

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

0 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. apearravt028boan2010...

120

Energy Challenge Two: The WeatherizeDC Campaign | Department...  

Broader source: Energy.gov (indexed) [DOE]

economic and environmental justice by creating clean energy career opportunities for people who need them most. The DC Project applies cutting-edge organizing tools and tactics...

Note: This page contains sample records for the topic "technique dc resistivity" 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

Modeling a short dc discharge with thermionic cathode and auxiliary anode  

SciTech Connect (OSTI)

A short dc discharge with a thermionic cathode can be used as a current and voltage stabilizer, but is subject to current oscillation. If instead of one anode two anodes are used, the current oscillations can be reduced. We have developed a kinetic model of such a discharge with two anodes, where the primary anode has a small opening for passing a fraction of the discharge current to an auxiliary anode. The model demonstrates that the current-voltage relationship of the discharge with two anodes is characterized everywhere by positive slope, i.e., positive differential resistance. Therefore, the discharge with two anodes is expected to be stable to the spontaneous oscillation in current that is induced by negative differential resistance. As a result, such a discharge can be used in an engineering application that requires stable plasma, such as a current and voltage stabilizer.

Bogdanov, E. [St. Petersburg State University, St. Petersburg 199034 (Russian Federation) [St. Petersburg State University, St. Petersburg 199034 (Russian Federation); University ITMO, Kronverkskiy pr. 49, St. Petersburg 197101 (Russian Federation); Demidov, V. I. [St. Petersburg State University, St. Petersburg 199034 (Russian Federation) [St. Petersburg State University, St. Petersburg 199034 (Russian Federation); West Virginia University, Morgantown, West Virginia 26506 (United States); Kaganovich, I. D. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)] [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States); Koepke, M. E. [West Virginia University, Morgantown, West Virginia 26506 (United States)] [West Virginia University, Morgantown, West Virginia 26506 (United States); Kudryavtsev, A. A. [St. Petersburg State University, St. Petersburg 199034 (Russian Federation)] [St. Petersburg State University, St. Petersburg 199034 (Russian Federation)

2013-10-15T23:59:59.000Z

122

EE443L Lab 2: Modeling a DC Motor Introduction  

E-Print Network [OSTI]

: In this lab we will develop and validate a basic model of a permanent magnet DC motor (Yaskawa Electric MINI: The DC motor is a common actuator in control systems that converts electrical energy into rotational Procedure: Through the following steps, motor parameters for the Yaskawa Electric MINI-Minertia motor

Wedeward, Kevin

123

Read-out electronics for DC squid magnetic measurements  

DOE Patents [OSTI]

Read-out electronics for DC SQUID sensor systems, the read-out electronics incorporating low Johnson noise radio-frequency flux-locked loop circuitry and digital signal processing algorithms in order to improve upon the prior art by a factor of at least ten, thereby alleviating problems caused by magnetic interference when operating DC SQUID sensor systems in magnetically unshielded environments.

Ganther, Jr., Kenneth R. (Olathe, KS); Snapp, Lowell D. (Independence, MO)

2002-01-01T23:59:59.000Z

124

ELECTROMAGNETIC RADIATION FROM A STRONG DC ELECTRIC FIELD  

E-Print Network [OSTI]

ELECTROMAGNETIC RADIATION FROM A STRONG DC ELECTRIC FIELD Manuel G¨udel 1 and Donat G. Wentzel 2 1 accelerated by a strong dc electric field show not only very efficient generation of beam waves but also emission of o­mode radiation. We present a set of particle simulations for which we study the behavior

Guedel, Manuel

125

Dynamic microscopic theory of fusion using DC-TDHF  

SciTech Connect (OSTI)

The density-constrained time-dependent Hartree-Fock (DC-TDHF) theory is a fully microscopic approach for calculating heavy-ion interaction potentials and fusion cross sections below and above the fusion barrier. We discuss recent applications of DC-TDHF method to fusion of light and heavy systems.

Umar, A. S.; Oberacker, V. E.; Keser, R.; Maruhn, J. A.; Reinhard, P.-G. [Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States); RTE University, Science and Arts Faculty, Department of Physics, 53100, Rize (Turkey); Institut fuer Theoretische Physik, Goethe-Universitaet, D-60438 Frankfurt am Main (Germany); Institut fur Theoretische Physik, Universitat Erlangen, D-91054 Erlangen (Germany)

2012-10-20T23:59:59.000Z

126

An Economic Impact Analysis of DC Drinking Water Quality  

E-Print Network [OSTI]

An Economic Impact Analysis of DC Drinking Water Quality Annual Progress Report for FY 2005 In January 2004, District of Columbia residents learned the drinking water supplied by the D.C. Water immediately responded by forming the Interagency Task Force on Lead in Drinking Water (The Task Force

District of Columbia, University of the

127

Historical Material Analysis of DC745U Pressure Pads  

SciTech Connect (OSTI)

As part of the Enhance Surveillance mission, it is the goal to provide suitable lifetime assessment of stockpile materials. This report is an accumulation of historical publication on the DC745U material and their findings. It is the intention that the B61 LEP program uses this collection of data to further develop their understanding and potential areas of study. DC745U is a commercially available silicone elastomer consisting of dimethyl, methyl-phenyl, and methyl-vinyl siloxane repeat units. Originally, this material was manufactured by Dow Corning as Silastic{reg_sign} DC745U at their manufacturing facility in Kendallville, IN. Recently, Dow Corning shifted this material to the Xiameter{reg_sign} brand product line. Currently, DC745U is available through Xiameter{reg_sign} or Dow Corning's distributor R. D. Abbott Company. DC745U is cured using 0.5 wt% vinyl-specific peroxide curing agent known as Luperox 101 or Varox DBPH-50. This silicone elastomer is used in numerous parts, including two major components (outer pressure pads and aft cap support) in the W80 and as pressure pads on the B61. DC745U is a proprietary formulation, thus Dow Corning provides limited information on its composition and properties. Based on past experience with Dow Corning, DC745U is at risk of formulation changes without notification to the costumer. A formulation change for DC745U may have a significant impact because the network structure is a key variable in determining material properties. The purpose of this report is to provide an overview of historical DC745U studies and identify gaps that need to be addressed in future work. Some of the previous studies include the following: 1. Spectroscopic characterization of raw gum stock. 2. Spectroscopic, thermal, and mechanical studies on cured DC745U. 3. Nuclear Magnetic Resonance (NMR) and solvent swelling studies on DC745U with different crosslink densities. 4. NMR, solvent swelling, thermal, and mechanical studies on thermally aged DC745U. 5. NMR, solvent swelling, thermal, and mechanical studies on radiolytically aged DC745U. Each area is reviewed and further work is suggested to improve our understanding of DC745U for systems engineering, surveillance, aging assessments, and lifetime assessment.

Ortiz-Acosta, Denisse [Los Alamos National Laboratory

2012-07-30T23:59:59.000Z

128

DC, AC and advanced EV propulsion systems  

SciTech Connect (OSTI)

Battery development and liquid fuel availability and cost are still the pacing factors in wide scale electric vehicle introduction. Propulsion systems also require technical development, however, if electric vehicles are to be acceptable in the marketplace in competition against ICE vehicles. Eaton Corporation has undertaken a program designed to identify and investigate three broad types of propulsion systems in identical test vehicles on the same test track under conditions as similar as possible. Characteristics of dc, ac and advanced systems are compared to date, and projections of anticipated results and further work are provided. The compelling advantages of multiple mechanical ratios in EV propulsion systems are reviewed. An emerging, but less obvious, advantage is higher overall system efficiency.

O'Neil, W.

1983-08-01T23:59:59.000Z

129

Pre-resistance-welding resistance check  

DOE Patents [OSTI]

A preweld resistance check for resistance welding machines uses an open circuited measurement to determine the welding machine resistance, a closed circuit measurement to determine the parallel resistance of a workpiece set and the machine, and a calculation to determine the resistance of the workpiece set. Any variation in workpiece set or machine resistance is an indication that the weld may be different from a control weld.

Destefan, Dennis E. (Broomfield, CO); Stompro, David A. (Idaho Falls, ID)

1991-01-01T23:59:59.000Z

130

Abstract --A systematic framework for reliability assessment and fault-tolerant design of multiphase dc-dc  

E-Print Network [OSTI]

reliability. Index Terms--Markov reliability modeling, maximum power point tracking, photovoltaics, switch1 Abstract -- A systematic framework for reliability assessment and fault-tolerant design of multiphase dc-dc converters deployed in photovoltaic applications is presented. System-level steady

Liberzon, Daniel

131

Annual Meeting of Energy Recovery Council, W hi DC D b 3 2011Washington DC, December 3. 2011  

E-Print Network [OSTI]

Annual Meeting of Energy Recovery Council, W hi DC D b 3 2011Washington DC, December 3. 2011 to the recyclers (e.g. metal smelters; secondary paper mills).(e.g. metal smelters; secondary paper mills). All, recovery (called WastetoEnergy; WTE) gy, , y ( gy; ) · All countries (and communities) who rely on WTE also

Columbia University

132

Direct-Current Resistivity Survey At Blue Mountain Area (Fairbank...  

Open Energy Info (EERE)

Blue Mountain Area (Fairbank Engineering Ltd, 2005) Exploration Activity Details Location Blue Mountain Area Exploration Technique Direct-Current Resistivity Survey Activity Date...

133

Dismantling techniques  

SciTech Connect (OSTI)

Most of the dismantling techniques used in a Decontamination and Dismantlement (D and D) project are taken from conventional demolition practices. Some modifications to the techniques are made to limit exposure to the workers or to lessen the spread of contamination to the work area. When working on a D and D project, it is best to keep the dismantling techniques and tools as simple as possible. The workers will be more efficient and safer using techniques that are familiar to them. Prior experience with the technique or use of mock-ups is the best way to keep workers safe and to keep the project on schedule.

Wiese, E.

1998-03-13T23:59:59.000Z

134

We Have a Winner - DC High School Regional Science Bowl Competition...  

Office of Environmental Management (EM)

We Have a Winner - DC High School Regional Science Bowl Competition Held Last Saturday We Have a Winner - DC High School Regional Science Bowl Competition Held Last Saturday...

135

High Gain Transformerless DC-DC Converters for Renewable Energy Sources  

E-Print Network [OSTI]

mode DCM Discontinuous conduction mode EAR Equivalent averaged resistance ESR Equivalent series resistance FC Fuel cell fS Switching frequency HVDC High voltage direct current ix, vx Instantaneous current, voltage of node x Ix, Vx Average....1. Introduction ................................................................................... 59 5.2. Design example and simulation .................................................... 62 5.3. Evaluation of multiple module approach in HVDC converters...

Denniston, Nicholas Aaron

2011-08-08T23:59:59.000Z

136

Implementing the DC Mode in Cosmological Simulations with Supercomoving Variables  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

As emphasized by previous studies, proper treatment of the density fluctuation on the fundamental scale of a cosmological simulation volume - the 'DC mode' - is critical for accurate modeling of spatial correlations on scales ~> 10% of simulation box size. We provide further illustration of the effects of the DC mode on the abundance of halos in small boxes and show that it is straightforward to incorporate this mode in cosmological codes that use the 'supercomoving' variables. The equations governing evolution of dark matter and baryons recast with these variables are particularly simple and include the expansion factor, and hence the effect of the DC mode, explicitly only in the Poisson equation.

Gnedin, Nickolay Y.; Kravtsov, Andrey V.; Rudd, Douglas H.

2011-06-02T23:59:59.000Z

137

Counterrotating brushless dc permanent magnet motor  

SciTech Connect (OSTI)

An brushless DC permanent magnet motor is provided for driving an autonomous underwater vehicle. In one embodiment, the motor comprises four substantially flat stators disposed in stacked relationship, with pairs of the stators being axially spaced and each of the stators comprising a tape-wound stator coil; and a first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore therein in which the first shaft is disposed. Two different sets of bearings support the first and second shAfts. In another embodiment, the motor comprises two ironless stators and pairs and rotors mounted no opposite sides of the stators and driven by counterrotating shafts.

Hawsey, R.A.; Bailey, J.M.

1990-12-31T23:59:59.000Z

138

Counterrotating brushless dc permanent magnet motor  

SciTech Connect (OSTI)

An brushless DC permanent magnet motor is provided for driving an autonomous underwater vehicle. In one embodiment, the motor comprises four substantially flat stators disposed in stacked relationship, with pairs of the stators being axially spaced and each of the stators comprising a tape-wound stator coil; and a first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore therein in which the first shaft is disposed. Two different sets of bearings support the first and second shAfts. In another embodiment, the motor comprises two ironless stators and pairs and rotors mounted no opposite sides of the stators and driven by counterrotating shafts.

Hawsey, R.A.; Bailey, J.M.

1990-01-01T23:59:59.000Z

139

Radiofrequency amplifier based on a dc superconducting quantum interference device  

DOE Patents [OSTI]

A low noise radiofrequency amplifier (10), using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID (11) and an input coil (12) are maintained at superconductivity temperatures in a superconducting shield (13), with the input coil (12) inductively coupled to the superconducting ring (17) of the dc SQUID (11). A radiofrequency signal from outside the shield (13) is applied to the input coil (12), and an amplified radiofrequency signal is developed across the dc SQUID ring (17) and transmitted to exteriorly of the shield (13). A power gain of 19.5.+-.0.5 dB has been achieved with a noise temperature of 1.0.+-.0.4 K. at a frequency of 100 MHz.

Hilbert, Claude (Berkeley, CA); Martinis, John M. (Berkeley, CA); Clarke, John (Berkeley, CA)

1986-01-01T23:59:59.000Z

140

Radiofrequency amplifier based on a dc superconducting quantum interference device  

DOE Patents [OSTI]

A low noise radiofrequency amplifer, using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID and an input coil are maintained at superconductivity temperatures in a superconducting shield, with the input coil inductively coupled to the superconducting ring of the dc SQUID. A radiofrequency signal from outside the shield is applied to the input coil, and an amplified radiofrequency signal is developed across the dc SQUID ring and transmitted to exteriorly of the shield. A power gain of 19.5 +- 0.5 dB has been achieved with a noise temperature of 1.0 +- 0.4 K at a frequency of 100 MHz.

Hilbert, C.; Martinis, J.M.; Clarke, J.

1984-04-27T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Washington, D.C. and Indiana: Allison Hybrid Technology Achieves...  

Broader source: Energy.gov (indexed) [DOE]

D.C. region, and demand continues to grow worldwide. The Washington Metropolitan Area Transit Authority (WMATA), with a total fleet of 1,480 buses, has more than 600 of them...

142

Modeling Microinverters and DC Power Optimizers in PVWatts  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and DC Power Optimizers in PVWatts Sara MacAlpine and Chris Deline National Renewable Energy Laboratory Technical Report NRELTP-5J00-63463 February 2015 NREL is a national...

143

Observation of negative absolute resistance in a Josephson junction  

E-Print Network [OSTI]

We experimentally demonstrate the occurrence of negative absolute resistance (NAR) up to about $-1\\Omega$ in response to an externally applied dc current for a shunted Nb-Al/AlO$_x$-Nb Josephson junction, exposed to a microwave current at frequencies in the GHz range. The realization (or not) of NAR depends crucially on the amplitude of the applied microwave current. Theoretically, the system is described by means of the resistively and capacitively shunted junction model in terms of a moderately damped, classical Brownian particle dynamics in a one-dimensional potential. We find excellent agreement of the experimental results with numerical simulations of the model.

J. Nagel; D. Speer; T. Gaber; A. Sterck; R. Eichhorn; P. Reimann; K. Ilin; M. Siegel; D. Koelle; R. Kleiner

2008-01-28T23:59:59.000Z

144

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November, 1998 An Empirical Study of the Effects of Minimization on the Fault Detection  

E-Print Network [OSTI]

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November Columbus, OH hongc@cis.ohio-state.edu Abstract Test suite minimization techniques attempt to reduce reduce the ability of that test suite to reveal faults in the software. A recent study showed

Rothermel, Gregg

145

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November, 1998 An Empirical Study of the Effects of Minimization on the Fault Detection  

E-Print Network [OSTI]

Proceedings of the International Conference on Software Maintenance, Washington, D.C., November Columbus, OH hongc@cis.ohio­state.edu Abstract Test suite minimization techniques attempt to reduce reduce the ability of that test suite to reveal faults in the software. A recent study showed

Rothermel, Gregg

146

The 100,000 amp dc power supply for a staged hadron collider superferric magnet  

SciTech Connect (OSTI)

A 1.5 volt 100,000 amp DC switcher power supply was developed for testing a superferric magnet string at FNAL. This supply was used during testing as both the ramping supply and holding supply powering a single magnet load with a total load resistance of 0.7{micro} Ohms. The supply consists of ten paralleled switcher cells, powered by a 400 volt/600 Amp DC power supply. Each cell consists of an IGBT H-bridge driving a step-down transformer at a switching frequency of 2 kHz. The transformer has an effective turns ratio of 224:1. The secondary consists of 32 parallel single-turn full wave rectifier windings. The rectification is done with 64 Shottky diodes. Each cell is rated at 1.5 volts/10,000 amps. During this test each cell was operated as a constant power source without load current or field feedback. This paper will describe the design of the switcher cell and control system used during testing. We will also describe the next level of improvements to the current feedback system to improve the ramp control.

Hays, Steven L.; Claypool, Bradley; Foster, G.William; /Fermilab

2005-09-01T23:59:59.000Z

147

Analysis of a transformer-less, multi-level DC-DC converter for HVDC operation  

SciTech Connect (OSTI)

HVDC systems require DC step up and DC step down units. The traditional approach is the application of twelve-pulse thyristor bridges with transformers. The developments of fast switching IGBT devices permit the development of transformer-less, multi-level converters. A multi-level circuit was suggested by Limpaecher. This paper presents a detailed simulation of the proposed circuit together with the analysis of its performance. The converter consists of a set of capacitors, air core inductors and solid state switches arranged in a ladder network. In the step-up mode, the closing of solid state switches resonantly charges the capacitors in parallel through an air-cored inductor. Then solid state switches resonantly charges the capacitors in parallel through an air-cored inductor. Then solid state switches connect the capacitors in series and discharge them through an air-core inductor to the load. In the step-down mode the capacitors are charged in series and discharged in parallel. The circuit has three modes of operation in each cycle: charge, inversion, and discharge. The circuit operation is analyzed in each mode using SPICE simulations. The selection of the components is discussed and output voltage regulation is analyzed. The results show that the proposed circuit promises significant reduction of losses, because of the zero current switching. The investment cost is reduced because of the elimination of transformers.

Karady, G.G.; Devarajan, S. [Arizona State Univ., Tempe, AZ (United States)

1998-12-31T23:59:59.000Z

148

A Low-Cost Soft-Switched DC/DC Converter for Solid-Oxide Fuel Cells  

SciTech Connect (OSTI)

A highly efficient DC to DC converter has been developed for low-voltage high-current solid oxide fuel cells. The newly developed 'V6' converter resembles what has been done in internal combustion engine that split into multiple cylinders to increase the output capacity without having to increase individual cell size and to smooth out the torque with interleaving operation. The development was started with topology overview to ensure that all the DC to DC converter circuits were included in the study. Efficiency models for different circuit topologies were established, and computer simulations were performed to determine the best candidate converter circuit. Through design optimization including topology selection, device selection, magnetic component design, thermal design, and digital controller design, a bench prototype rated 5-kW, with 20 to 50V input and 200/400V output was fabricated and tested. Efficiency goal of 97% was proven achievable through hardware experiment. This DC to DC converter was then modified in the later stage to converter 35 to 63 V input and 13.8 V output for automotive charging applications. The complete prototype was tested at Delphi with their solid oxide fuel cell test stand to verify the performance of the modified DC to DC converter. The output was tested up to 3-kW level, and the efficiency exceeded 97.5%. Multiple-phase interleaving operation design was proved to be reliable and ripple free at the output, which is desirable for the battery charging. Overall this is a very successful collaboration project between the SECA Core Technology Team and Industrial Team.

Jason Lai

2009-03-03T23:59:59.000Z

149

Analysis and design of a saturable reactor assisted soft-switching full-bridge dc-dc converter  

SciTech Connect (OSTI)

Analysis and design considerations for a saturable reactor assisted soft-switching full-bridge dc-dc converter are presented. The converter has advantages such as low switching losses with no substantial increase in conduction losses, wide load range, and constant frequency operation. To show how to utilize the analysis results, a 350-W, 500-kHz converter is chosen as a design example. The results are verified experimentally on a prototype converter.

Hamada, Satoshi (Sansha Electric Manufacturing Co., Ltd., Osaka (Japan)); Nakaoka, Mutsuo (Kobe Univ. (Japan). Dept. of Electrical and Electronics Engineering)

1994-05-01T23:59:59.000Z

150

A High Efficiency DC-DC Converter Topology Suitable for Distributed Large Commercial and Utility Scale PV Systems  

SciTech Connect (OSTI)

In this paper a DC-DC power converter for distributed photovoltaic plant architectures is presented. The proposed converter has the advantages of simplicity, high efficiency, and low cost. High efficiency is achieved by having a portion of the input PV power directly fed forward to the output without being processed by the converter. The operation of this converter also allows for a simplified maximum power point tracker design using fewer measurements

Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Robert L. Steigerwald; Juan A. Sabate; Song Chi; Adam J. McCann; Li Zhang; Frank Mueller

2012-09-01T23:59:59.000Z

151

Reid Rosnick/DC/USEPA/US 10/25/2012 11:54 AM  

E-Print Network [OSTI]

EPA-694 Reid Rosnick/DC/USEPA/US 10/25/2012 11:54 AM To Philip Egidi cc bcc Subject Re: Subpart W Pennsylvania Ave., NW Washington, DC 20460 202.343.9563 rosnick.reid@epa.gov -----Philip Egidi/DC/USEPA/US wrote: ----- To: Reid Rosnick/DC/USEPA/US@EPA From: Philip Egidi/DC/USEPA/US Date: 10/25/2012 11:41AM Cc

152

DC Resistivity Survey (Mise-A-La-Masse) At Roosevelt Hot Springs...  

Open Energy Info (EERE)

Area. References S. H. Ward, W. T. Parry, W. P. Nash, W. R. Sill, K. L. Cook, R. B. Smith, D. S. Chapman, F. H. Brown, J. A. Whelan, J. R. Bowman (1978) A Summary of the...

153

DC Resistivity Survey (Dipole-Dipole Array) At Waunita Hot Springs  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergy InformationCuyamungue,Czero,Geothermal

154

DC Resistivity Survey (Mise-A-La-Masse) At Roosevelt Hot Springs Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergy

155

DC Resistivity Survey (Mise-A-La-Masse) | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) Jump to: navigation, search GEOTHERMAL

156

DC Resistivity Survey (Wenner Array) At Mt Princeton Hot Springs Geothermal  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin:EnergyWisconsin:2003)CrowleyEnergyMasse) Jump to: navigation,Area (Richards, Et

157

DC Resistivity Survey (Dipole-Dipole Array) At Coso Geothermal Area (1977)  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC JumpCrow Lake Wind JumpCuttings Analysis AtCycloceanCropsDBDBD|

158

DC Resistivity Survey (Dipole-Dipole Array) At Mt Princeton Hot Springs  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions LLC JumpCrow Lake Wind JumpCuttings Analysis

159

Exploring the Raft River geothermal area, Idaho, with the dc resistivity  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 No revision has beenFfe2fb55-352f-473b-a2dd-50ae8b27f0a6 NoSan Leandro,Law andEnergyEvogyMore Steam for

160

Category:DC Resistivity Survey (Dipole-Dipole Array) | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBostonFacilityCascade SierraStatus Status ofCore

Note: This page contains sample records for the topic "technique dc resistivity" 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

Category:DC Resistivity Survey (Pole-Dipole Array) | Open Energy  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home5b9fcbce19 NoPublic Utilities Address: 160Benin: EnergyBostonFacilityCascade SierraStatus Status ofCoreInformation

162

Analysis of dc harmonics using the three-pulse model for the intermountain power project HVDC transmission  

SciTech Connect (OSTI)

The harmonic analysis of the dc-side of an HVDC line transmission requires realistic models of the converters, the dc line, and other relevant equipment. These models must include all important paths for harmonic current, and appropriate sources of harmonic voltage generation. The classical converter modeling technique has been demonstrated to be insufficient in field measurements and analysis of the harmonic spectra found on recent HVDC line transmission. For this reason, a new model of the converter bridge which takes into account the major stray capacitances in the converter (the three-pulse model) has been developed, and is described in detail elsewhere. This paper presents comparisons between the classical and three-pulse calculations for the Intermountain Power Project (IPP) HVDC transmission. The calculation results from the three-pulse model agree favorably with the harmonics found in field measurements.

Dickmander, D.L.; Peterson, K.J.

1989-04-01T23:59:59.000Z

163

Corrosion resistance and behavior of construction materials exposed to dilute sulfuric acid at elevated temperatures under static conditions  

SciTech Connect (OSTI)

Laboratory investigation has been undertaken to determine the electrochemical behavior and corrosion resistance of various construction materials in a simulated hydrolysis environment (5 wt % sulfuric acid) at temperatures ranging from 90 to 220C. Tests were performed in an autoclave-type electrochemical cell. The corrosion behavior of the test materials was determined using computer-controlled DC potentiodynamic polarization. Corrosion rates of the test materials were determined using AC impedance techniques. Among the stainless steels tested, only alloy N08026 (Carpenter 20Mo-6) performed satisfactory up to a temperature of 100C. The alloy passivated spontaneously in the environment and corroded at a rate of less than 2 mpy. None of the stainless steels tested could be used at 120{degrees}C or above. A number of nickel-based alloys tested had good corrosion resistance up to 100C, but their corrosion rate exceeded 2 mpy at higher temperatures. Zirconium alloys were satisfactory up to 180C. Only tantalum and a tantalum-niobium alloy were satisfactory up to 220C.

Nguyen, D.T.

1994-10-01T23:59:59.000Z

164

DESIGN OF A DC/RF PHOTOELECTRON GUN.  

SciTech Connect (OSTI)

An integrated dc/rf photoelectron gun produces a low-emittance beam by first rapidly accelerating electrons at a high gradient during a short ({approx}1 ns), high-voltage pulse, and then injecting the electrons into an rf cavity for subsequent acceleration. Simulations show that significant improvement of the emittance appears when a high field ({approx} 0.5-1 GV/m) is applied to the cathode surface. An adjustable dc gap ({le} 1 mm) which can be integrated with an rf cavity is designed for initial testing at the Injector Test Stand at Argonne National Laboratory using an existing 70-kV pulse generator. Plans for additional experiments of an integrated dc/rf gun with a 250-kV pulse generator are being made.

YU,D.NEWSHAM,Y.SMIRONOV,A.YU,J.SMEDLEY,J.SRINIVASAN RAU,T.LEWELLEN,J.ZHOLENTS,A.

2003-05-12T23:59:59.000Z

165

Active dc filter for HVDC system--A test installation in the Konti-Skan DC link at Lindome converter station  

SciTech Connect (OSTI)

The purpose of introducing active dc filters is to meet the more and more stringent requirement from power utilities on limiting telephone interference caused by harmonic currents from HVdc transmission lines, without unnecessarily increasing the cost of HVdc stations. An active dc filter installed in the Konti-Skan HVdc link is described. The active dc filter is connected at the bottom of an existing passive dc filter at the Lindome station. The active dc filter includes optic harmonic current measuring unit, control system, protection and supervision system, PWM power amplifier, high-frequency transformer, surge arrester, and coupling apparatuses. The active dc filter has small physical size and occupies small ground area. The performance of the active dc filter for eliminating the disturbing harmonics is excellent. To achieve comparable results by passive filters would require something like ten times more high voltage equipment.

Zhang, Wenyan; Asplund, G. (ABB Power Systems, Ludvika (Sweden). HVDC Division); Aberg, A. (ABB Corporate Research, Lund (Sweden). Dept. of Man-Machine Communication); Jonsson, U. (Svenska Kraftnaet, Vaellingby (Sweden)); Loeoef, O. (Vattenfall AB, Trollhaettan (Sweden). Region Vaestsverige)

1993-07-01T23:59:59.000Z

166

Application of direct pulsewidth modulation scheme to AC-DC converters: - a way to reduce ripple  

E-Print Network [OSTI]

Modulation (ISPWM), 4 Direct Pulsewidth Modulation (DPWM). 15 5 Single Phase Half Controlled PWM ac-dc Converter . 6 Single Phase Full controlled PWM ac-dc Converter . 18 18 7 Simulation of SPWM ac-dc Converter. 20 8 Output Voltage Spectra of SPWM ac... 30 Balanced Three Phase Inputs 31 Output Voltage of A Three Phase Full Controlled ac-dc SPWM Converter. 42 32 Output Voltage of A Three Phase Full Controlled ac-dc EPWM Con- verter 33 Output Voltage of A Three Phase Full Controlled ac-dc ISPWM Con...

Zhang, Yuemin

1993-01-01T23:59:59.000Z

167

Thermoelectric-Generator-Based DC-DC Conversion Network for Automotive Applications.  

E-Print Network [OSTI]

?? As waste heat recovering techniques, especially thermoelectric generator (TEG technologies, develop during recent years?its utilization in automotive industry is attempted from many aspects. Previous… (more)

Li, Molan

2011-01-01T23:59:59.000Z

168

A new technique to reject dc-link voltage ripple in PWM inverters  

E-Print Network [OSTI]

to acknowledge the support of my husband and parents. TA. BLE OF CONTENTS CHAPTER I INTRODUCTION Page I. l Inverter Power Supplies 1. 2 Output Voltage Control 1. 2. 1 Control Of Voltage Supplied To The Inverter I. 2. 2 Control Of Voltage Within... and output of Stage 3 78 34 Exact solution of the switching angle trajectories for harmonic elimination with voltage control (M). 85 CHAPTER I INTRODUCTION Finding ways to control the flow of electricity has been a. goal of inventors and scientists...

Shireen, Wajiha

1990-01-01T23:59:59.000Z

169

Electrochemical Techniques  

SciTech Connect (OSTI)

Sensitive and selective detection techniques are of crucial importance for capillary electrophoresis (CE), microfluidic chips, and other microfluidic systems. Electrochemical detectors have attracted considerable interest for microfluidic systems with features that include high sensitivity, inherent miniaturization of both the detection and control instrumentation, low cost and power demands, and high compatibility with microfabrication technology. The commonly used electrochemical detectors can be classified into three general modes: conductimetry, potentiometry, and amperometry.

Chen, Gang; Lin, Yuehe

2008-07-20T23:59:59.000Z

170

High voltage dc--dc converter with dynamic voltage regulation and decoupling during load-generated arcs  

DOE Patents [OSTI]

A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules. 5 Figs.

Shimer, D.W.; Lange, A.C.

1995-05-23T23:59:59.000Z

171

High voltage dc-dc converter with dynamic voltage regulation and decoupling during load-generated arcs  

DOE Patents [OSTI]

A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules.

Shimer, Daniel W. (Danville, CA); Lange, Arnold C. (Livermore, CA)

1995-01-01T23:59:59.000Z

172

Corrosion resistant concrete using corrosion resistant steel.  

E-Print Network [OSTI]

??Corrosion of reinforced concrete is a major concern in the United States infrastructure. It is possible to create corrosion resistant concrete structures throughcareful evaluation of… (more)

Beh, David

2013-01-01T23:59:59.000Z

173

Studies of Resistive Wall Heating at JLAB FEL  

SciTech Connect (OSTI)

When the JLAB FEL is under CW operation, it had been observed that temperature rises over the wiggler vacuum chamber, presumably as the result of the power deposition on the resistive wall of the wiggler chamber. Previous analyses have been done on the resistive wall impedance for various cases, such as DC, AC, and anomalous skin effects*. Here we report an investigation on the beam kinetic energy losses for each of these cases. This study includes the non-ultrarelativistic effect on resistive wall loss, for both round pipe and parallel plates. We will present the comparison of our results with the measured data obtained during CW operation of the JLAB FEL. Other possible factors contributing to the measured heating will also be discussed.

Li, Rui; Benson, Stephen V.

2013-06-01T23:59:59.000Z

174

Solar Decathlon at Home in the D.C. Community | Department of...  

Broader source: Energy.gov (indexed) [DOE]

at Home in the D.C. Community Solar Decathlon at Home in the D.C. Community December 4, 2012 - 4:25pm Addthis One of the new homeowners, Layika Culley, and her family cut the...

175

Analysis of Fe Nanoparticles Using XPS Measurements Under D.C...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fe Nanoparticles Using XPS Measurements Under D.C. or Pulsed-Voltage Bias. Analysis of Fe Nanoparticles Using XPS Measurements Under D.C. or Pulsed-Voltage Bias. Abstract: The...

176

Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on...  

Office of Environmental Management (EM)

Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on Energy Security 40 Years after the Embargo - As Delivered Energy Secretary Moniz's Remarks at CSIS in Washington D.C....

177

D.C. Community Comes Together in the Name of Sustainability,...  

Broader source: Energy.gov (indexed) [DOE]

D.C. Community Comes Together in the Name of Sustainability, Affordability D.C. Community Comes Together in the Name of Sustainability, Affordability July 1, 2011 - 1:02pm Addthis...

178

Train the Teacher - Energy Workshops for DC-area Elementary School...  

Broader source: Energy.gov (indexed) [DOE]

Train the Teacher - Energy Workshops for DC-area Elementary School Teachers Train the Teacher - Energy Workshops for DC-area Elementary School Teachers May 2, 2014 1:00PM to 4:15PM...

179

E-Print Network 3.0 - average current dc Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

tronicsConfrenceAPC 92), Boston,February23-27,pp. 731-7j,. 1;2. A Resonant DC-DC Transformer Summary: State Operation. The steady state voltage and current waveforms when the...

180

Q&A: Kristen Psaki of WeatherizeDC | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Q&A: Kristen Psaki of WeatherizeDC April 15, 2010 - 3:45pm Addthis Roughly 20 percent of carbon emissions come from inefficient homes. The DC Project says it has found a way to...

Note: This page contains sample records for the topic "technique dc resistivity" 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

Hybrid Multilevel Inverter with Single DC Haiwen Liu1  

E-Print Network [OSTI]

Hybrid Multilevel Inverter with Single DC Source Haiwen Liu1 , Leon M. Tolbert1, 2 , Burak Ozpineci Knoxville, TN 37932 3. Parker-Hannifin Corp. Olive Branch, MI 38654 Abstract- A hybrid multilevel inverter inverter (one leg for each phase) and H-bridge in series with each inverter leg. The inverter can be used

Tolbert, Leon M.

182

DC Optimal Power Flow: Uniqueness and Chee Wei Tan  

E-Print Network [OSTI]

and are computationally fast for practical smart power grids. I. BACKGROUND The Optimal Power Flow (OPF) problem network. The DC-OPF can be practically important in a smart grid, where there are renewables, e.g., solar implications on how algorithms can be designed to solve the OPF in a smart grid. Different from prior work

Tan, Chee Wei

183

Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,,  

E-Print Network [OSTI]

Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,, * Adrian Down, Nathan G increased in recent decades, but incidents involving natural gas pipelines still cause an average of 17 fatalities and $133 M in property damage annually. Natural gas leaks are also the largest anthropogenic

Jackson, Robert B.

184

D.C. Water Resources Research Institute Annual Technical Report  

E-Print Network [OSTI]

projects that address the three components of integrated urban water system: storm water runoff and sewer developing and maintaining new environmental quality testing and modeling tools to advance water researchD.C. Water Resources Research Institute Annual Technical Report FY 2013 D.C. Water Resources

185

Electrostatic coalescence system with independent AC and DC hydrophilic electrodes  

DOE Patents [OSTI]

An improved electrostatic coalescence system is provided in which independent AC and DC hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The AC field is produced between an AC electrode array and the water-oil interface wherein the AC electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the AC field in an evenly distributed manner at the interface. The AC field promotes drop-drop and drop-interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated AC electrode array and enters a strong DC field produced between closely spaced DC electrodes in which small dispersed droplets of water entrained in the continuous phase are removed primarily by collection at hydrophilic DC electrodes. Large droplets of water collected by the electrodes migrate downward through the AC electrode array to the interface. All phase separation mechanisms are utilized to accomplish more complete phase separation.

Hovarongkura, A. David (Arlington, VA); Henry, Jr., Joseph D. (Morgantown, WV)

1981-01-01T23:59:59.000Z

186

High Voltage DC Transmission 1.0 Introduction  

E-Print Network [OSTI]

1 High Voltage DC Transmission 1.0 Introduction HVDC has been applied in electric power systems for many years now. Figure 1 illustrates worldwide many of the HVDC applications [1]. Fig. 1 ABB provides a webpage which summarizes HVDC projects by type and capacity or by commissioning year [2]. Wikipedia [3

McCalley, James D.

187

High Voltage DC Transmission 2 1.0 Introduction  

E-Print Network [OSTI]

1 High Voltage DC Transmission 2 1.0 Introduction Interconnecting HVDC within an AC system requires on use of switching devices collectively referred to in the HVDC community as valves. Valves may be non. Fig. 1 There have been three types of devices for implementing HVDC converter circuits: mercury

McCalley, James D.

188

Electromagnetic Coupling in a dc Motor and Tachometer Assembly  

E-Print Network [OSTI]

-pole permanent magnet stator devices. A shaft of finite stiffness connects the tachometer and motor armatures machines. The experimental test setup consists of an integrated permanent magnet dc motor-tachometer unit-tachometer shaft or a flexible mechanical coupling, this exercise in servo-control design becomes quite challenging

Awtar, Shorya

189

Building Scale DC Microgrids Chris Marnay, Steven Lanzisera, Michael Stadler, and Judy Lai  

E-Print Network [OSTI]

of building loads are either native DC, such as electronics and compact fluorescent and light emitting diode

190

A Decentralized Protection Scheme for Converters Utilizing a DC-link Inductor  

E-Print Network [OSTI]

- as in HVDC transmission for example - as well as in DC-links for high-power current source inverters

Lipo, Thomas

191

Interviews in Washington, DC for Albert Einstein Fellowship Semi-Finalists  

Broader source: Energy.gov [DOE]

Selected semi-finalists in the Albert Einstein Distinguished Educator Fellowship are invited to DC for interviews.

192

Control of a Fuel-Cell Powered DC Electric Vehicle Motor  

E-Print Network [OSTI]

Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith Sigurd Skogestad of a Fuel-Cell Powered DC Electric Vehicle Motor #12;3 Currently Available Models and Control Strategies Skogestad, Control of a Fuel-Cell Powered DC Electric Vehicle Motor #12;3 Currently Available Models

Skogestad, Sigurd

193

November 2002 15th TOFE, Washington, D.C. 1 Thermal Behavior and Operating  

E-Print Network [OSTI]

November 2002 15th TOFE, Washington, D.C. 1 Thermal Behavior and Operating Requirements of IFE Washington, D.C. November 2002 #12;November 2002 15th TOFE, Washington, D.C. 2 Abstract During injection the thermal behavior of the target under such conditions and explores possible ways of extending the target

Raffray, A. René

194

On the optimization of a dc arcjet diamond chemical vapor deposition reactor  

E-Print Network [OSTI]

On the optimization of a dc arcjet diamond chemical vapor deposition reactor S. W. Reevea) and W. A precursor in our dc arcjet reactor.1 Based on conclusions drawn from that work, an optimization strategy diamond film growth in a dc arcjet chemical vapor deposition reactor has been developed. Introducing

Dandy, David

195

DC current induced metal-insulator transition in epitaxial Sm{sub 0.6}Nd{sub 0.4}NiO{sub 3}/LaAlO{sub 3} thin film  

SciTech Connect (OSTI)

The metal-insulator transition (MIT) in strong correlated electron materials can be induced by external perturbation in forms of thermal, electrical, optical, or magnetic fields. We report on the DC current induced MIT in epitaxial Sm{sub 0.6}Nd{sub 0.4}NiO{sub 3} (SNNO) thin film deposited by pulsed laser deposition on (001)-LaAlO{sub 3} substrate. It was found that the MIT in SNNO film not only can be triggered by thermal, but also can be induced by DC current. The T{sub MI} of SNNO film decreases from 282 K to 200 K with the DC current density increasing from 0.003 × 10{sup 9} A•m{sup ?2} to 4.9 × 10{sup 9} A•m{sup ?2}. Based on the resistivity curves measured at different temperatures, the MIT phase diagram has been successfully constructed.

Huang, Haoliang [Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China) [Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); Luo, Zhenlin, E-mail: zlluo@ustc.edu.cn; Yang, Yuanjun; Yang, Mengmeng; Wang, Haibo; Hu, Sixia; Bao, Jun [CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China) [CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (China); Yun, Yu; Meng, Dechao; Lu, Yalin [CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)] [CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); Gao, Chen, E-mail: cgao@ustc.edu.cn [Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China) [Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China); CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); National Synchrotron Radiation Laboratory and School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2014-05-15T23:59:59.000Z

196

Thermal contact resistance  

E-Print Network [OSTI]

This work deals with phenomena of thermal resistance for metallic surfaces in contact. The main concern of the work is to develop reliable and practical methods for prediction of the thermal contact resistance for various ...

Mikic, B. B.

1966-01-01T23:59:59.000Z

197

Recovery Act: Integrated DC-DC Conversion for Energy-Efficient Multicore Processors  

SciTech Connect (OSTI)

In this project, we have developed the use of thin-film magnetic materials to improve in energy efficiency of digital computing applications by enabling integrated dc-dc power conversion and management with on-chip power inductors. Integrated voltage regulators also enables fine-grained power management, by providing dynamic scaling of the supply voltage in concert with the clock frequency of synchronous logic to throttle power consumption at periods of low computational demand. The voltage converter generates lower output voltages during periods of low computational performance requirements and higher output voltages during periods of high computational performance requirements. Implementation of integrated power conversion requires high-capacity energy storage devices, which are generally not available in traditional semiconductor processes. We achieve this with integration of thin-film magnetic materials into a conventional complementary metal-oxide-semiconductor (CMOS) process for high-quality on-chip power inductors. This project includes a body of work conducted to develop integrated switch-mode voltage regulators with thin-film magnetic power inductors. Soft-magnetic materials and inductor topologies are selected and optimized, with intent to maximize efficiency and current density of the integrated regulators. A custom integrated circuit (IC) is designed and fabricated in 45-nm CMOS silicon-on-insulator (SOI) to provide the control system and power-train necessary to drive the power inductors, in addition to providing a digital load for the converter. A silicon interposer is designed and fabricated in collaboration with IBM Research to integrate custom power inductors by chip stacking with the 45-nm CMOS integrated circuit, enabling power conversion with current density greater than 10A/mm2. The concepts and designs developed from this work enable significant improvements in performance-per-watt of future microprocessors in servers, desktops, and mobile devices. These new approaches to scaled voltage regulation for computing devices also promise significant impact on electricity consumption in the United States and abroad by improving the efficiency of all computational platforms. In 2006, servers and datacenters in the United States consumed an estimated 61 billion kWh or about 1.5% of the nation's total energy consumption. Federal Government servers and data centers alone accounted for about 10 billion kWh, for a total annual energy cost of about $450 million. Based upon market growth and efficiency trends, estimates place current server and datacenter power consumption at nearly 85 billion kWh in the US and at almost 280 billion kWh worldwide. Similar estimates place national desktop, mobile and portable computing at 80 billion kWh combined. While national electricity utilization for computation amounts to only 4% of current usage, it is growing at a rate of about 10% a year with volume servers representing one of the largest growth segments due to the increasing utilization of cloud-based services. The percentage of power that is consumed by the processor in a server varies but can be as much as 30% of the total power utilization, with an additional 50% associated with heat removal. The approaches considered here should allow energy efficiency gains as high as 30% in processors for all computing platforms, from high-end servers to smart phones, resulting in a direct annual energy savings of almost 15 billion kWh nationally, and 50 billion kWh globally. The work developed here is being commercialized by the start-up venture, Ferric Semiconductor, which has already secured two Phase I SBIR grants to bring these technologies to the marketplace.

Shepard, Kenneth L

2013-03-31T23:59:59.000Z

198

PLANT RESISTANCE Glandular-Haired Alfalfa Resistance to Potato Leafhopper  

E-Print Network [OSTI]

PLANT RESISTANCE Glandular-Haired Alfalfa Resistance to Potato Leafhopper (Homoptera: Cicadellidae for the degree and types of resistance to the potato leafhopper, Empoasca fabae (Harris), and hopperburn. A tube resistance indices for potato leafhopper resistance, hopperburn resistance, and an overall glandular

Mathis, Wayne N.

199

Method of producing titanium-modified austenitic steel having improved swelling resistance  

DOE Patents [OSTI]

A process for improving the swelling resistance of a titanium-modified austenitic stainless steel that involves a combination of rapid solidification and dynamic compaction techniques.

Megusar, Janez (Belmont, MA); Grant, Nicholas J. (Winchester, MA)

1989-01-01T23:59:59.000Z

200

Multilevel cascade voltage source inverter with seperate DC sources  

DOE Patents [OSTI]

A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

Peng, Fang Zheng (Oak Ridge, TN); Lai, Jih-Sheng (Knoxville, TN)

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Multilevel cascade voltage source inverter with separate DC sources  

DOE Patents [OSTI]

A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations. 15 figs.

Peng, F.Z.; Lai, J.S.

1997-06-24T23:59:59.000Z

202

Multilevel cascade voltage source inverter with seperate DC sources  

DOE Patents [OSTI]

A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

Peng, Fang Zheng (Knoxville, TN); Lai, Jih-Sheng (Blacksburg, VA)

2002-01-01T23:59:59.000Z

203

HOPM1 mediated disease resistance to Pseudomonas syringae in Arabidopsis  

DOE Patents [OSTI]

The present invention relates to compositions and methods for enhancing plant defenses against pathogens. More particularly, the invention relates to enhancing plant immunity against bacterial pathogens, wherein HopM1.sub.1-300 mediated protection is enhanced, such as increased protection to Pseudomonas syringae pv. tomato DC3000 HopM1 and/or there is an increase in activity of an ATMIN associated plant protection protein, such as ATMIN7. Reagents of the present invention further provide a means of studying cellular trafficking while formulations of the present inventions provide increased pathogen resistance in plants.

He, Sheng Yang (Okemos, MI); Nomura, Kinya (East Lansing, MI)

2011-11-15T23:59:59.000Z

204

Basic DC Meter Design ECE 2100 Circuit Analysis Laboratory  

E-Print Network [OSTI]

Basic DC Meter Design ECE 2100 Circuit Analysis Laboratory updated 8 January 2008 Pre-Laboratory Assignment 1. Design an ammeter with full scale current IFS equal to 5 mA using a meter movement rated at 0.5 mA and 100 mV. 2. Design a voltmeter with a full scale voltage VFS equal to 10 V using the meter

Miller, Damon A.

205

Report on Non-Contact DC Electric Field Sensors  

SciTech Connect (OSTI)

This document reports on methods used to measure DC electrostatic fields in the range of 100 to 4000 V/m using a non-contact method. The project for which this report is written requires this capability. Non-contact measurements of DC fields is complicated by the effect of the accumulation of random space-charges near the sensors which interfere with the measurement of the field-of-interest and consequently, many forms of field measurements are either limited to AC measurements or use oscillating devices to create pseudo-AC fields. The intent of this document is to report on methods discussed in the literature for non-contact measurement of DC fields. Electric field meters report either the electric field expressed in volts per distance or the voltage measured with respect to a ground reference. Common commercial applications for measuring static (DC) electric fields include measurement of surface charge on materials near electronic equipment to prevent arcing which can destroy sensitive electronic components, measurement of the potential for lightning to strike buildings or other exposed assets, measurement of the electric fields under power lines to investigate potential health risks from exposure to EM fields and measurement of fields emanating from the brain for brain diagnostic purposes. Companies that make electric field sensors include Trek (Medina, NY), MKS Instruments, Boltek, Campbell Systems, Mission Instruments, Monroe Electronics, AlphaLab, Inc. and others. In addition to commercial vendors, there are research activities continuing in the MEMS and optical arenas to make compact devices using the principles applied to the larger commercial sensors.

Miles, R; Bond, T; Meyer, G

2009-06-16T23:59:59.000Z

206

!#"%$'&)(02130546708913@A4B0DC Scott Schaefer, Joe Warren  

E-Print Network [OSTI]

¢¡¤£¦¥¨§©©¡ !#"%$'&)(¤02130546708913£@¡A4B0DC Scott Schaefer, Joe Warren Rice UniversityE: for each edge in the grid that contains a sign change (i.e.; the vertices on its end- points these methods primal methods. i e-mail: p sschaefe,jwarrenq @rice.edu Figure 1: A sphere contoured using

Warren, Joe

207

The Use of DC Glow Discharges as Undergraduate Educational Tools  

SciTech Connect (OSTI)

Plasmas have a beguiling way of getting students excited and interested in physics. We argue that plasmas can and should be incorporated into the undergraduate curriculum as both demonstrations and advanced investigations of electromagnetism and quantum effects. Our device, based on a direct current (DC) glow discharge tube, allows for a number of experiments into topics such as electrical breakdown, spectroscopy, magnetism, and electron temperature.

Stephanie A. Wissel and Andrew Zwicker, Jerry Ross, and Sophia Gershman

2012-10-09T23:59:59.000Z

208

Disc rotors with permanent magnets for brushless dc motor  

SciTech Connect (OSTI)

This patent describes a brushless dc permanent magnet motor for driving an autonomous underwater vehicle. It comprises first and second substantially flat, generally cylindrical stators disposed in side by side relation; a first substantially flat, generally cylindrical rotor; a first shaft connected to the first rotor and a second, concentric shaft connected to the second rotor; and means for providing rotation of the first and second shafts in opposite directions.

Hawsey, R.A.; Bailery, J.M.

1992-05-26T23:59:59.000Z

209

Electrical resistance tomography from measurements inside a steel cased borehole  

DOE Patents [OSTI]

Electrical resistance tomography (ERT) produced from measurements taken inside a steel cased borehole. A tomographic inversion of electrical resistance measurements made within a steel casing was then made for the purpose of imaging the electrical resistivity distribution in the formation remotely from the borehole. The ERT method involves combining electrical resistance measurements made inside a steel casing of a borehole to determine the electrical resistivity in the formation adjacent to the borehole; and the inversion of electrical resistance measurements made from a borehole not cased with an electrically conducting casing to determine the electrical resistivity distribution remotely from a borehole. It has been demonstrated that by using these combined techniques, highly accurate current injection and voltage measurements, made at appropriate points within the casing, can be tomographically inverted to yield useful information outside the borehole casing.

Daily, William D. (Livermore, CA); Schenkel, Clifford (Walnut Creek, CA); Ramirez, Abelardo L. (Pleasanton, CA)

2000-01-01T23:59:59.000Z

210

Optimal Demand Response in DC Distribution Networks Hamed Mohsenian-Rad, Member, IEEE and Ali Davoudi, Member, IEEE  

E-Print Network [OSTI]

such as photovoltaic systems are essentially DC sources. Battery storage devices are also easier H. Mohsenian

Mohsenian-Rad, Hamed

211

Communication accepte: Healthy Buildings/IAQ'97 Washington DC, septembre 1997Communication accepte: Healthy Buildings/IAQ'97 Washington DC, septembre 1997 DISCRIMINATION OF VOLATILE ORGANIC COMPOUNDS  

E-Print Network [OSTI]

Communication acceptée: Healthy Buildings/IAQ'97 Washington DC, septembre 1997Communication acceptée: Healthy Buildings/IAQ'97 Washington DC, septembre 1997 DISCRIMINATION OF VOLATILE ORGANIC manuscript, published in "4th International Conference on Healthy Buildings'97, Washington : United States

Paris-Sud XI, Université de

212

System and method for determining stator winding resistance in an AC motor  

SciTech Connect (OSTI)

A system and method for determining stator winding resistance in an AC motor is disclosed. The system includes a circuit having an input connectable to an AC source and an output connectable to an input terminal of an AC motor. The circuit includes at least one contactor and at least one switch to control current flow and terminal voltages in the AC motor. The system also includes a controller connected to the circuit and configured to modify a switching time of the at least one switch to create a DC component in an output of the system corresponding to an input to the AC motor and determine a stator winding resistance of the AC motor based on the injected DC component of the voltage and current.

Lu, Bin (Kenosha, WI); Habetler, Thomas G. (Snellville, GA); Zhang, Pinjia (Atlanta, GA); Theisen, Peter J. (West Bend, WI)

2011-05-31T23:59:59.000Z

213

System and method for determining stator winding resistance in an AC motor using motor drives  

SciTech Connect (OSTI)

A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current.

Lu, Bin; Habetler, Thomas G; Zhang, Pinjia

2013-02-26T23:59:59.000Z

214

airborne resistivity techniques: Topics by E-print Network  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

152 Long-term determination of airborne concentrations of unattached and attached radon progeny using stacked LR 115 detector with Biology and Medicine Websites Summary:...

215

Hydrogen permeation resistant barrier  

DOE Patents [OSTI]

A hydrogen permeation resistant barrier is formed by diffusing aluminum into an iron or nickel alloy and forming an intermetallic aluminide layer.

McGuire, Joseph C. (Richland, WA); Brehm, William F. (Richland, WA)

1982-01-01T23:59:59.000Z

216

From Consumer Resistance to Stakeholder Resistance The case of nanotechnology*  

E-Print Network [OSTI]

1 From Consumer Resistance to Stakeholder Resistance The case of nanotechnology* Caroline Gauthier proposes to study the resistance of stakeholders, by exploring the nanotech field. Nanotechnology is today in the resistance context. Keywords. Nanotechnology; Resistance Bio. Caroline Gauthier is currently Professor

Boyer, Edmond

217

The dc modeling program (DCMP): Version 2. 0  

SciTech Connect (OSTI)

In this project one of the main objectives was the refinement of tools for the study of HVDC systems. The original software was prepared in project RP1964-2 (EL-4365) as power flow and stability program models for HVDC systems. In this project new modeling capabilities were added to both the power flow and stability models. Additionally, the HVDC specific model capabilities were integrated into a new program, termed the Standalone program, for use in the development and testing of HVDC models. This manual provides technical background for programmers and those interested in understanding, augmenting or transporting the dc models.

Chapman, D.G. (Manitoba HVDC Research Centre, Winnipeg, MB (Canada))

1990-08-01T23:59:59.000Z

218

Positron lifetime spectrometer using a DC positron beam  

DOE Patents [OSTI]

An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.

Xu, Jun; Moxom, Jeremy

2003-10-21T23:59:59.000Z

219

EA-351 DC Energy Dakota, LLC | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: TopEnergy DOEDealingVehicle1 Closing American Electric0-A S.A.C.94-A-B1 DC

220

Hardwired Control Changes For NSTX DC Power Feeds  

SciTech Connect (OSTI)

The National Spherical Torus Experiment (NSTX) has been designed and installed in the existing facilities at Princeton Plasma Physics Laboratory (PPPL). Most of the hardware, plant facilities, auxiliary sub-systems, and power systems originally used for the Tokamak Fusion Test Reactor (TFTR) have been used with suitable modifications to reflect NSTX needs. The original TFTR Hardwired Control System (HCS) with electromechanical relays was used for NSTX DC Power loop control and protection during NSTX operations. As part of the NSTX Upgrade, the HCS is being changed to a PLC-based system with the same control logic. This paper gives a description of the changeover to the new PLC-based system __________________________________________________

Ramakrishnan, S.

2013-06-28T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Energy Incentive Programs, Washington DC | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Year in Review: TopEnergyIDIQBusinessin Jamaica,Idaho EnergyMontanaOregonTexasWashington DC

222

Correspondences DDT resistance in  

E-Print Network [OSTI]

Magazine R587 Correspondences DDT resistance in flies carries no cost Caroline McCart1, Angus to carry a cost in the absence of pesticide and consequently not to spread to fixation [1,2]. However, DDT resistance in Drosophila melanogaster (DDT-R) is approaching fixation globally, long after withdrawl of DDT

Buckling, Angus

223

E-Print Network 3.0 - ac-dc power transmission Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Ris Summary: (AEDVESESY) DFIG control Power control loop Speed control loop Wind turbine control Measurement grid point AC DC... reference DFIG control Power control...

224

Design and Modeling of Centralized Distribution Network for the DC House Project.  

E-Print Network [OSTI]

?? This thesis focuses on the design, modeling, simulation, and performance evaluation of Centralized Distribution Network for the DC House Project. Power System Computer Aided… (more)

Bassi, Harpreet S.

2013-01-01T23:59:59.000Z

225

Sustainable Energy Utility- D.C. Home Performance (District of Columbia)  

Broader source: Energy.gov [DOE]

The District of Columbia Sustainable Energy Utility currently offers the D.C. Home Performance program (DCHP). DCHP provides a $500 incentive to properties which successfully complete qualifying...

226

Design and analysis of a zero-voltage switching scheme for a dc- to-dc converter  

E-Print Network [OSTI]

&rt~RV, Page 40 Voltage across inain switch in a clc cliopper clrive with zeio-voltage s w 1 't C 1 1 i l1 g , &g CHAPTER I INTRODUCTION A. Introduction In general terms, power electronics is concerned wit, h the conversion and control of electrical... power (dc or ac) at variable voltage and variable frequency. With the development of power semi- conductor devices such as silicon-controlled rectifiers (SCR's), gate-turn-off thyris- tors (GTO's), bipolar junction transistors (BJT's), metal...

Arun, G.

1992-01-01T23:59:59.000Z

227

Data:Eec988f9-dc0d-45ef-9789-a7781dc1934b | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744b55997c1ccEeae2669-ec94-4cc4-bbae-0108084310cc No revision has been approved for this81dc1934b No revision

228

Waste form development for a DC arc furnace  

SciTech Connect (OSTI)

A laboratory crucible study was conducted to develop waste forms to treat nonradioactive simulated {sup 238}Pu heterogeneous debris waste from Savannah River, metal waste from the Idaho National Engineering Laboratory (INEL), and nominal waste also from INEL using DC arc melting. The preliminary results showed that the different waste form compositions had vastly different responses for each processing effect. The reducing condition of DC arc melting had no significant effects on the durability of some waste forms while it decreased the waste form durability from 300 to 700% for other waste forms, which resulted in the failure of some TCLP tests. The right formulations of waste can benefit from devitrification and showed an increase in durability by 40%. Some formulations showed no devitrification effects while others decreased durability by 200%. Increased waste loading also affected waste form behavior, decreasing durability for one waste, increasing durability by 240% for another, and showing no effect for the third waste. All of these responses to the processing and composition variations were dictated by the fundamental glass chemistry and can be adjusted to achieve maximal waste loading, acceptable durability, and desired processing characteristics if each waste formulation is designed for the result according to the glass chemistry.

Feng, X.; Bloomer, P.E.; Chantaraprachoom, N.; Gong, M.; Lamar, D.A.

1996-09-01T23:59:59.000Z

229

AC resistance measuring instrument  

DOE Patents [OSTI]

An auto-ranging AC resistance measuring instrument for remote measurement of the resistance of an electrical device or circuit connected to the instrument includes a signal generator which generates an AC excitation signal for application to a load, including the device and the transmission line, a monitoring circuit which provides a digitally encoded signal representing the voltage across the load, and a microprocessor which operates under program control to provide an auto-ranging function by which range resistance is connected in circuit with the load to limit the load voltage to an acceptable range for the instrument, and an auto-compensating function by which compensating capacitance is connected in shunt with the range resistance to compensate for the effects of line capacitance. After the auto-ranging and auto-compensation functions are complete, the microprocessor calculates the resistance of the load from the selected range resistance, the excitation signal, and the load voltage signal, and displays of the measured resistance on a digital display of the instrument. 8 figs.

Hof, P.J.

1983-10-04T23:59:59.000Z

230

Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid  

E-Print Network [OSTI]

Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid-- With the penetration of renewable energy in modern power system, microgrid has become a popular application worldwide. In this paper, parallel-connected bidirectional converters for AC and DC hybrid microgrid application

Teodorescu, Remus

231

High Dynamic Performance Programmed PWM Control of a Multilevel Inverter with Capacitor DC Sources  

E-Print Network [OSTI]

High Dynamic Performance Programmed PWM Control of a Multilevel Inverter with Capacitor DC Sources inverter consisting of a stan- dard 3-leg inverter supplied by a DC source and three full H-bridges each reactive voltage to the motor while the standard three leg inverter can supply both reactive and active

Tolbert, Leon M.

232

CTMCONTROL: Addressing the MC/DC Objective for Safety-Critical Automotive Software  

E-Print Network [OSTI]

CTMCONTROL: Addressing the MC/DC Objective for Safety-Critical Automotive Software Anila Mjeda.mjeda,mike.hinchey}@lero.ie Abstract. We propose a method tailored to the requirements of safety-critical embedded automotive software/DC) objective for automotive safety-critical software. CTMCONTROL is validated via a controlled experiment which

Paris-Sud XI, Université de

233

Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management  

E-Print Network [OSTI]

such as photovoltaic (PV) systems and secondary batteries. In this paper, several distributed generators (DGs) have1 Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management been merged together with a pair of batteries and loads to form an autonomous dc Microgrid (MG

Vasquez, Juan Carlos

234

PID Control with Derivative Filtering Integral Anti-Windup for a DC Servo  

E-Print Network [OSTI]

PID Control with Derivative Filtering and Integral Anti-Windup for a DC Servo Nicanor Quijano in the prelab for PID controllers. For that, we use the DC motor for the SRV-02ET to do position control. You . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.4 PID Controller with Derivative Filtering

235

DC H2O: What's on Tap? Annual Progress Report for FY 2004  

E-Print Network [OSTI]

for distributing treated water to DC residents has taken the brunt of the blame and has developed mechanisms. Project resources have secured a GPS unit and additional resources have already been allocated for GIS as a part of the 4-H Youth Cyber Camp. And as such, will incorporate the technological aspects of the DC H2O

District of Columbia, University of the

236

Smith, D.C., et al., 2000 ODP Technical Note 28  

E-Print Network [OSTI]

Smith, D.C., et al., 2000 ODP Technical Note 28 METHODS FOR QUANTIFYING POTENTIAL MICROBIAL CONTAMINATION DURING DEEP OCEAN CORING 1,2 David C. Smith,3 Arthur J. Spivack,4 Martin R. Fisk,5 Shelley A that these contamination tests be routinely conducted when coring for microbiological studies. 1Smith, D.C., Spivack, A

237

A nonlinear robust HVDC control for a parallel AC/DC power system  

E-Print Network [OSTI]

A nonlinear robust HVDC control for a parallel AC/DC power system Hongzhi Cai a , Zhihua Qu b. Keywords: Robust control; HVDC; Power system; Stability; Lyapunov method 1. Introduction It has been recognized that, through an HVDC transmission line, fast electronic control can be applied on the DC power

Qu, Zhihua

238

EE443L: Intermediate Control Lab Lab2: Modeling a DC motor  

E-Print Network [OSTI]

will develop and validate a basic model of a permanent magnet DC motor (Yaskawa Electric, Mini-series, Minertia of a permanent magnet DC motor, the field current is constant (i.e. a constant magnetic field). It can be shown(t) = input voltage eb(t) = back emf if(t) = field current (t) = shaft angle (t) = torque J = moment

Wedeward, Kevin

239

Federal Government Congressional Budget Office, Health & Human Services, Long Term Modeling Washington, DC  

E-Print Network [OSTI]

Manila, Philippines BRAC Dhaka, Bangladesh California Forward San Francisco, CA CARE (WDI) Atlanta, GA and Dhaka, Bangladesh CARE USA Washington, DC SUMMER 2009 INTERNSHIPS #12;Center for Women Policy Studies Educational Resources Africa Kumasi, Ghana Pew Center on Global Climate Change Washington, DC Rick Snyder

Shyy, Wei

240

Adaptive Selective Harmonic Minimization Based on ANNs for Cascade Multilevel Inverters With Varying DC Sources  

SciTech Connect (OSTI)

A new approach for modulation of an 11-level cascade multilevel inverter using selective harmonic elimination is presented in this paper. The dc sources feeding the multilevel inverter are considered to be varying in time, and the switching angles are adapted to the dc source variation. This method uses genetic algorithms to obtain switching angles offline for different dc source values. Then, artificial neural networks are used to determine the switching angles that correspond to the real-time values of the dc sources for each phase. This implies that each one of the dc sources of this topology can have different values at any time, but the output fundamental voltage will stay constant and the harmonic content will still meet the specifications. The modulating switching angles are updated at each cycle of the output fundamental voltage. This paper gives details on the method in addition to simulation and experimental results.

Filho, Faete [ORNL; Maia, Helder Z [UFMS, Department of Electrical Engineering; Mateus, Tiago Henrique D [ORNL; Ozpineci, Burak [ORNL; Tolbert, Leon M [ORNL; Pinto, Joao Onofre P [ORNL

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Possible temperature control DC switch effect between two superconductors  

E-Print Network [OSTI]

The lifetime of an electron pair could not be unlimited long, on the basis of this, we suggest a model. The model means that the movements of charge carriers in a superconductor should have three forms: the single-electron movement, the single-pair movement, and the revolving around the mass center of two electrons in a pair. Thus the current in a superconductor has three possible parts. Similarly, there should be three possible effects in a SIS junction: the tunneling of single electron, the tunneling of single pair, and the pair-forming following the pair-breaking. This paper will discuss these problems and present a possible temperature control DC switch effect between two superconductors.

Tian De Cao

2011-08-11T23:59:59.000Z

242

Discharging a DC bus capacitor of an electrical converter system  

DOE Patents [OSTI]

A system and method of discharging a bus capacitor of a bidirectional matrix converter of a vehicle are presented here. The method begins by electrically shorting the AC interface of the converter after an AC energy source is disconnected from the AC interface. The method continues by arranging a plurality of switching elements of a second energy conversion module into a discharge configuration to establish an electrical current path from a first terminal of an isolation module, through an inductive element, and to a second terminal of the isolation module. The method also modulates a plurality of switching elements of a first energy conversion module, while maintaining the discharge configuration of the second energy conversion module, to at least partially discharge a DC bus capacitor.

Kajouke, Lateef A; Perisic, Milun; Ransom, Ray M

2014-10-14T23:59:59.000Z

243

Disc rotors with permanent magnets for brushless DC motor  

SciTech Connect (OSTI)

A brushless dc permanent magnet motor drives an autonomous underwater vehe. In one embodiment, the motor comprises four substantially flat stators in stacked relationship, with pairs of the stators axially spaced, each of the stators comprising a tape-wound stator coil, and first and second substantially flat rotors disposed between the spaced pairs of stators. Each of the rotors includes an annular array of permanent magnets embedded therein. A first shaft is connected to the first rotor and a second, concentric shaft is connected to the second rotor, and a drive unit causes rotation of the two shafts in opposite directions. The second shaft comprises a hollow tube having a central bore in which the first shaft is disposed. Two different sets of bearings support the first and second shafts. In another embodiment, the motor comprises two ironless stators and pairs of rotors mounted on opposite sides of the stators and driven by counterrotating shafts.

Hawsey, Robert A. (Oak Ridge, TN); Bailey, J. Milton (Knoxville, TN)

1992-01-01T23:59:59.000Z

244

FLUXCAP: A flux-coupled ac/dc magnetizing device  

E-Print Network [OSTI]

We report on an instrument for applying ac and dc magnetic fields by capturing the flux from a rotating permanent magnet and projecting it between two adjustable pole pieces. This can be an alternative to standard electromagnets for experiments with small samples or in probe stations in which an applied magnetic field is needed locally, with advantages that include a compact form-factor, very low power requirements and dissipation as well as fast field sweep rates. This flux capture instrument (FLUXCAP) can produce fields from -400 to +400 mT, with field resolution less than 1 mT. It generates static magnetic fields as well as ramped fields, with ramping rates as high as 10 T/s. We demonstrate the use of this apparatus for studying the magnetotransport properties of spin-valve nanopillars, a nanoscale device that exhibits giant magnetoresistance.

Gopman, Daniel B; Kent, Andrew D

2012-01-01T23:59:59.000Z

245

Generating expansion model incorporating compact DC power flow equations  

SciTech Connect (OSTI)

This paper presents a compact method of incorporating the spatial dimension into the generation expansion problem. Compact DC power flow equations are used to provide real-power flow coordination equations. Using these equations the marginal contribution of a generator to th total system loss is formulated as a function of that generator`s output. Incorporating these flow equations directly into the MIP formulation of the generator expansion problem results in a model that captures a generator`s true net marginal cost, one that includes both the cost of generation and the cost of transport. This method contrasts with other methods that iterate between a generator expansion model and an optimal power flow model. The proposed model is very compact and has very good convergence performance. A case study with data from Kenya is used to provide a practical application to the model.

Nderitu, D.G.; Sparrow, F.T.; Yu, Z. [Purdue Inst. for Interdisciplinary Engineering Studies, West Lafayette, IN (United States)

1998-12-31T23:59:59.000Z

246

Decreased abundance of type III secretion system-inducing signals in Arabidopsis mkp1 enhances resistance against Pseudomonas syringae  

SciTech Connect (OSTI)

Many phytopathogenic bacteria use a type III secretion system (T3SS) to inject defense-suppressing effector proteins into host cells. Genes encoding the T3SS are induced at the start of infection, yet host signals that initiate T3SS gene expression are poorly understood. Here we identify several plant-derived metabolites that induce the T3SS in the bacterial pathogen Pseudomonas syringae pv tomato DC3000. In addition, we report that mkp1 (mapk phosphatase 1), an Arabidopsis mutant that is more resistant to bacterial infection, produces decreased levels of these T3SS-inducing metabolites. Consistent with the observed decrease in these metabolites, T3SS effector delivery by DC3000 was impaired in mkp1. Addition of the bioactive metabolites to the mkp1-DC3000 interaction fully restored T3SS effector delivery and suppressed enhanced resistance in mkp1. Together, these results demonstrate that DC3000 perceives multiple signals derived from plants to initiate their virulence program, and reveal a new layer of molecular communication between plants and these pathogenic bacteria.

Anderson, Jeffrey C.; Wan, Ying; Kim, Young-Mo; Pasa-Tolic, Ljiljana; Metz, Thomas O.; Peck, Scott C.

2014-04-21T23:59:59.000Z

247

High energy electron fluxes in dc-augmented capacitively coupled plasmas I. Fundamental characteristics  

SciTech Connect (OSTI)

Power deposition from electrons in capacitively coupled plasmas (CCPs) has components from stochastic heating, Joule heating, and from the acceleration of secondary electrons through sheaths produced by ion, electron, or photon bombardment of electrodes. The sheath accelerated electrons can produce high energy beams which, in addition to producing excitation and ionization in the gas can penetrate through the plasma and be incident on the opposite electrode. In the use of CCPs for microelectronics fabrication, there may be an advantage to having these high energy electrons interact with the wafer. To control the energy and increase the flux of the high energy electrons, a dc bias can be externally imposed on the electrode opposite the wafer, thereby producing a dc-augmented CCP (dc-CCP). In this paper, the characteristics of dc-CCPs will be discussed using results from a computational study. We found that for a given rf bias power, beams of high energy electrons having a narrow angular spread (<1 deg. ) can be produced incident on the wafer. The maximum energy in the high energy electron flux scales as {epsilon}{sub max}=-V{sub dc}+V{sub rf}+V{sub rf0}, for a voltage on the dc electrode of V{sub dc}, rf voltage of V{sub rf}, and dc bias on the rf electrode of V{sub rf0}. The dc current from the biased electrode must return to ground through surfaces other than the rf electrode and so seeks out a ground plane, typically the side walls. If the side wall is coated with a poorly conducting polymer, the surface will charge to drive the dc current through.

Wang Mingmei [Department of Chemical and Biological Engineering, Iowa State University, Ames, Iowa 50010 (United States); Kushner, Mark J. [Department of Electrical Engineering and Computer Science, University of Michigan, 1301 Beal Ave., Ann Arbor, Michigan 48109 (United States)

2010-01-15T23:59:59.000Z

248

Characterization of the CEBAF 100 kV DC GaAs Photoelectron Gun Vacuum System  

SciTech Connect (OSTI)

A vacuum system with pressure in the low ultra-high vacuum (UHV) range is essential for long photocathode lifetimes in DC high voltage GaAs photoguns. A discrepancy between predicted and measured base pressure in the CEBAF photoguns motivated this study of outgassing rates of three 304 stainless steel chambers with different pretreatments and pump speed measurements of non-evaporable getter (NEG) pumps. Outgassing rates were measured using two independent techniques. Lower outgassing rates were achieved by electropolishing and vacuum firing the chamber. The second part of the paper describes NEG pump speed measurements as a function of pressure through the lower part of the UHV range. Measured NEG pump speed is high at pressures above 5×10^?11 Torr, but may decrease at lower pressures depending on the interpretation of the data. The final section investigates the pump speed of a locally produced NEG coating applied to the vacuum chamber walls. These studies represent the first detailed vacuum measurements of CEBAF photogun vacuum chambers.

M.L. Stutzman; P. Adderley; J. Brittian; J. Clark; J. Grames; J. Hansknecht; G.R. Myneni; M. Poelker

2007-05-01T23:59:59.000Z

249

Reduction of DC-link Capacitor in Case of Cascade Multilevel Converters by means of Reactive Power  

E-Print Network [OSTI]

to integrate wind generator to multi- terminal dc collection network are few such examples. The basic block

Teodorescu, Remus

250

Inductorless DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle  

E-Print Network [OSTI]

Inductorless DC-AC Cascaded H-bridge Multilevel Boost Inverter for Electric/Hybrid Electric Vehicle boost inverter for EV and HEV applications. Currently available power inverter systems for HEVs use a DC- DC boost converter to boost the battery voltage for a traditional 3-phase inverter. The present HEV

Tolbert, Leon M.

251

Minimization of DC Reactor and Operation Characteristics of Direct-Power-Controlled Current-Source PWM Rectifier  

E-Print Network [OSTI]

Minimization of DC Reactor and Operation Characteristics of Direct-Power-Controlled Current control; hence inductance of the DC reactor can be reduced. Feasibility of the strategy is verified characteristics of the direct power control based current-source PWM rectifier with a miniaturized DC reactor

Fujimoto, Hiroshi

252

Impact of quasi-dc currents on three-phase distribution transformer installations  

SciTech Connect (OSTI)

This report summarizes a series of tests designed to determine the response of quasi-dc currents on three-phase power distribution transformers for electric power systems. In general, if the dc injection is limited to the primary side of a step-down transformer, significant harmonic distortion is noted and an increase in the reactive power demand results. For dc injection on the secondary (load) side of the step-down transformer the harmonic content at the secondary side is quite high and saturation occurs with a relatively low level of dc injection; however, the reactive power demand is significantly lower. These tests produced no apparent damage to the transformers. Transformer damage is dependent on the duration of the dc excitation, the level of the excitation, and on thermal characteristics of the transfer. The transformer response time is found to be much shorter than seen in power transformer tests at lower dc injection levels. This shorter response time suggests that the response time is strongly dependent on the injected current levels, and that higher levels of dc injection for shorter durations could produce very high reactive power demands and harmonic distortion within a few tenths of a second. The added reactive power load could result in the blowing of fuses on the primary side of the transformer for even moderate dc injection levels, and neutral currents are quite large under even low-level dc injection. This smoking neutral'' results in high-level harmonic injection into equipment via the neutral and in possible equipment failure.

McConnell, B.W.; Barnes, P.R. (Oak Ridge National Lab., TN (United States)); Tesche, F.M. (Tesche (F.M.), Dallas, TX (United States)); Schafer, D.A. (Mission Research Corp., Albuquerque, NM (United States))

1992-06-01T23:59:59.000Z

253

Observation and cancellation of the dc Stark shift in strontium optical lattice clocks  

E-Print Network [OSTI]

We report on the observation of a dc Stark frequency shift at the $10^{-13}$ level by comparing two strontium optical lattice clocks. This frequency shift arises from the presence of electric charges trapped on dielectric surfaces placed under vacuum close to the atomic sample. We show that these charges can be eliminated by shining UV light on the dielectric surfaces, and characterize the residual dc Stark frequency shift on the clock transition at the $10^{-18}$ level by applying an external electric field. This study shows that the dc Stark shift can play an important role in the accuracy budget of lattice clocks, and should be duly taken into account.

Lodewyck, Jérôme; Lorini, Luca; Gurov, Mikhail; Lemonde, Pierre

2011-01-01T23:59:59.000Z

254

The smoothing transformer, a new concept in dc side harmonic reduction of HVdc schemes  

SciTech Connect (OSTI)

Direct connection schemes have been a subject of recent investigation, offering operational flexibility and substantial reductions in ac components. In these schemes the use of active dc filters has been suggested to replace the conventional tuned passive filter design. This paper presents the smoothing transformer as a new means for reducing dc harmonics at characteristic and non-characteristic frequencies using only passive components. A realistic smoothing transformer design is examined using the New Zealand HVdc system operating in the direct connection mode. The steady-state and transient performance of the smoothing transformer design is compared with that of the existing dc smoothing reactor and filter bank.

Enright, W.; Arrillaga, J.; Wood, A.R.; Hidalgo, F.P.

1996-10-01T23:59:59.000Z

255

Power Supply Changes for NSTX Resistive Wall Mode Coils  

SciTech Connect (OSTI)

The National Spherical Torus Experiment (NSTX) has been designed and installed in the existing facilities at Princeton Plasma Physics Laboratory (PPPL). Most of the hardware, plant facilities, auxiliary sub-systems, and power systems originally used for the Tokamak Fusion Test Reactor (TFTR) have been used with suitable modifications to reflect NSTX needs. Prior to 2004, the NSTX power system was feeding twelve (12) circuits in the machine. In 2004 the Resistive Wall Mode (RWM) Coils were installed on the machine to correct error fields. There are six of these coils installed around the machine in the mid-plane. Since these coils need fast and accurate controls, a Switching Power Amplifier (SPA) with three sub-units was procured, installed and commissioned along with other power loop components. Two RWM Coils were connected in series and fed from one SPA sub-unit. After the initial RWM campaign, operational requirements evolved such that each of the RWM coils now requires separate power and control. Hence a second SPA with three sub-units has been procured and installed. The second unit is of improved design and has the controls and power components completely isolated. The existing thyristor rectifier is used as DC Link to both of the Switching Power Amplifiers. The controls for the RWM are integrated into the overall computer control of the DC Power systems for NSTX. This paper describes the design changes in the RWM Power system for NSTX.

Ramakrishnan, S S.

2013-06-28T23:59:59.000Z

256

Vehicle Technologies Office Merit Review 2014: High Performance DC Bus Film Capacitor  

Broader source: Energy.gov [DOE]

Presentation given by GE Global Research at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high performance DC bus...

257

Strontium Titanate DC Electric Field Switchable and Tunable Bulk Acoustic Wave Solidly Mounted Resonator  

E-Print Network [OSTI]

Strontium Titanate DC Electric Field Switchable and Tunable Bulk Acoustic Wave Solidly Mounted Abstract - A voltage switchable/tunable strontium titanate solidly mounted BAW resonator was implemented films, piezoelectric resonators. I. INTRODUCTION Strontium titanate (STO) and barium strontium titanate

York, Robert A.

258

Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings  

E-Print Network [OSTI]

a-vis the impact of partial loads on power system componentto test the effect of partial load conditions and possibleto direct-DC savings. Partial load effects reduce estimates

Garbesi, Karina

2012-01-01T23:59:59.000Z

259

Over-Current Protection Scheme for SiC Power MOSFET DC Circuit Breaker  

E-Print Network [OSTI]

V. Radun, “SiC based solid state power controller,” in 23tha solid-state circuit breaker based on SiC power MOSFET withSolid-state DC circuit breakers made of the modern wide bandgap power

Zhang, Yuan; Liang, Yung C.

2015-01-01T23:59:59.000Z

260

Application to Export Electric Energy OE Docket No. EA-351 DC...  

Broader source: Energy.gov (indexed) [DOE]

DC Energy Dakota, LLC Application to export electric energy OE Docket No. EA-210-B PPL EnergyPlus, LLC Application to Export Electric Energy OE Docket No. EA-354 Endure...

Note: This page contains sample records for the topic "technique dc resistivity" 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

Hydrogen Storage Systems Analysis Working Group Meeting Argonne National Laboratory DC Offices  

E-Print Network [OSTI]

Hydrogen Storage Systems Analysis Working Group Meeting Argonne National Laboratory DC Offices 955 by Romesh Kumar Argonne National Laboratory and Laura Verduzco Sentech, Inc. February 28, 2007 #12;SUMMARY

262

Measured Savings of DC to AC Drive Retrofit in Plastic Extrusion  

E-Print Network [OSTI]

This paper presents the potential electrical energy efficiency improvements for utilizing alternating current (AC) motors controlled by variable frequency drives (VFD) in place of direct current (DC) motors to drive plastic extrusion machines. A...

Sfeir, R. A.

2008-01-01T23:59:59.000Z

263

Dean's Report from DC (Nov 2011) 1: Federal Science Funding PerspecAve  

E-Print Network [OSTI]

Dean's Report from DC (Nov 2011) 1: Federal Science Funding Perspec (AdministraAon's) FY12 PrioriAes Ã? Moving toward a clean energy future to reduce dependence on energy imports while curbing greenhouse gas emissions Ã? Understanding

Wang, Yuqing

264

Washington, D.C. : essays on the city form of a capital  

E-Print Network [OSTI]

This thesis is an exploration of the city form of Washington. D.C. through four independent essays. Each essay examines a different aspect of the city: its monumentality as determined by its relationship with the nation ...

Kousoulas, George

1985-01-01T23:59:59.000Z

265

Area Efficient D/A Converters For Accurate DC Operation Brandon Royce Greenley  

E-Print Network [OSTI]

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49 6.2 Mismatch Modeling For Area Optimization . . . . . . . . . . . . . . . . . . . . . . . 51 6Area Efficient D/A Converters For Accurate DC Operation by Brandon Royce Greenley A THESIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 5.1 Measurement Setup

Moon, Un-Ku

266

DC-OPF Formulation with Price-Sensitive Demand Bids Junjie Sun and Leigh Tesfatsion  

E-Print Network [OSTI]

DC-OPF Formulation with Price-Sensitive Demand Bids Junjie Sun and Leigh Tesfatsion Last Revised (TNCS) subject to various transmission constraints. As explained at length in Sun and Tesfation (2007

Tesfatsion, Leigh

267

Multilevel-Dc-Bus Inverter For Providing Sinusoidal And Pwm Electrical Machine Voltages  

DOE Patents [OSTI]

A circuit for controlling an ac machine comprises a full bridge network of commutation switches which are connected to supply current for a corresponding voltage phase to the stator windings, a plurality of diodes, each in parallel connection to a respective one of the commutation switches, a plurality of dc source connections providing a multi-level dc bus for the full bridge network of commutation switches to produce sinusoidal voltages or PWM signals, and a controller connected for control of said dc source connections and said full bridge network of commutation switches to output substantially sinusoidal voltages to the stator windings. With the invention, the number of semiconductor switches is reduced to m+3 for a multi-level dc bus having m levels. A method of machine control is also disclosed.

Su, Gui-Jia [Knoxville, TN

2005-11-29T23:59:59.000Z

268

Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings  

E-Print Network [OSTI]

wind/fuel cell hybrid energy systems. Energy and Buildings,National Energy Modeling System PHEV plug-in hybrid electrica hybrid DC and AC power system that included energy storage

Garbesi, Karina

2012-01-01T23:59:59.000Z

269

High luminosity, slow ejecta and persistent carbon lines: SN 2009dc challenges thermonuclear explosion scenarios .  

E-Print Network [OSTI]

??Extended optical and near-IR observations reveal that SN 2009dc shares a number of similarities with normal Type Ia supernovae (SNe Ia), but is clearly overluminous,… (more)

Taubenberger, S.

2011-01-01T23:59:59.000Z

270

ReHABit : claiming endangered structures in Washington DC to rethink subsidized housing  

E-Print Network [OSTI]

There is an affordable housing crisis today in Washington D.C. that is the result of a uniquely complicated history of a capital city and a current economic boom. This thesis responds to that crisis by proposing a new ...

Fowlkes, Catherine Kuhnle

2007-01-01T23:59:59.000Z

271

Assessor Training Assessment Techniques  

E-Print Network [OSTI]

NVLAP Assessor Training Assessment Techniques: Communication Skills and Conducting an Assessment listener ·Knowledgeable Assessor Training 2009: Assessment Techniques: Communication Skills & Conducting, truthful, sincere, discrete · Diplomatic · Decisive · Selfreliant Assessor Training 2009: Assessment

272

Corrosion-resistant metal surfaces  

DOE Patents [OSTI]

The present invention relates to metal surfaces having thereon an ultrathin (e.g., less than ten nanometer thickness) corrosion-resistant film, thereby rendering the metal surfaces corrosion-resistant. The corrosion-resistant film includes an at least partially crosslinked amido-functionalized silanol component in combination with rare-earth metal oxide nanoparticles. The invention also relates to methods for producing such corrosion-resistant films.

Sugama, Toshifumi (Wading River, NY)

2009-03-24T23:59:59.000Z

273

Degenerate resistive switching and ultrahigh density storage in resistive memory  

SciTech Connect (OSTI)

We show that in tantalum oxide resistive memories, activation power provides a multi-level variable for information storage that can be set and read separately from the resistance. These two state variables (resistance and activation power) can be precisely controlled in two steps: (1) the possible activation power states are selected by partially reducing resistance, then (2) a subsequent partial increase in resistance specifies the resistance state and the final activation power state. We show that these states can be precisely written and read electrically, making this approach potentially amenable for ultra-high density memories. We provide a theoretical explanation for information storage and retrieval from activation power and experimentally demonstrate information storage in a third dimension related to the change in activation power with resistance.

Lohn, Andrew J., E-mail: drewlohn@gmail.com; Mickel, Patrick R., E-mail: prmicke@sandia.gov; James, Conrad D.; Marinella, Matthew J. [Sandia National Laboratories, Albuquerque, New Mexico 87185 (United States)

2014-09-08T23:59:59.000Z

274

Abrasion resistant heat pipe  

DOE Patents [OSTI]

A specially constructed heat pipe for use in fluidized bed combustors. Two distinct coatings are spray coated onto a heat pipe casing constructed of low thermal expansion metal, each coating serving a different purpose. The first coating forms aluminum oxide to prevent hydrogen permeation into the heat pipe casing, and the second coating contains stabilized zirconium oxide to provide abrasion resistance while not substantially affecting the heat transfer characteristics of the system.

Ernst, Donald M. (Leola, PA)

1984-10-23T23:59:59.000Z

275

Abrasion resistant heat pipe  

DOE Patents [OSTI]

A specially constructed heat pipe is described for use in fluidized bed combustors. Two distinct coatings are spray coated onto a heat pipe casing constructed of low thermal expansion metal, each coating serving a different purpose. The first coating forms aluminum oxide to prevent hydrogen permeation into the heat pipe casing, and the second coating contains stabilized zirconium oxide to provide abrasion resistance while not substantially affecting the heat transfer characteristics of the system.

Ernst, D.M.

1984-10-23T23:59:59.000Z

276

Corrosive resistant heat exchanger  

DOE Patents [OSTI]

A corrosive and errosive resistant heat exchanger which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is conveyed through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium.

Richlen, Scott L. (Annandale, VA)

1989-01-01T23:59:59.000Z

277

Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings  

SciTech Connect (OSTI)

An increasing number of energy efficient appliances operate on direct current (DC) internally, offering the potential to use DC from renewable energy systems directly and avoiding the losses inherent in converting power to alternating current (AC) and back. This paper investigates that potential for net-metered residences with on-site photovoltaics (PV) by modeling the net power draw of the ‘direct-DC house’ with respect to today’s typical configuration, assuming identical DC-internal loads. Power draws were modeled for houses in 14 U.S. cities, using hourly, simulated PV-system output and residential loads. The latter were adjusted to reflect a 33% load reduction, representative of the most efficient DC-internal technology, based on an analysis of 32 electricity end-uses. The model tested the effect of climate, electric vehicle (EV) loads, electricity storage, and load shifting on electricity savings; a sensitivity analysis was conducted to determine how future changes in the efficiencies of power system components might affect savings potential. Based on this work, we estimate that net-metered PV residences could save 5% of their total electricity load for houses without storage and 14% for houses with storage. Based on residential PV penetration projections for year 2035 obtained from the National Energy Modeling System (2.7% for the reference case and 11.2% for the extended policy case), direct-DC could save the nation 10 trillion Btu (without storage) or 40 trillion Btu (with storage). Shifting the cooling load by two hours earlier in the day (pre-cooling) has negligible benefits for energy savings. Direct-DC provides no energy savings benefits for EV charging, to the extent that charging occurs at night. However, if charging occurred during the day, for example with employees charging while at work, the benefits would be large. Direct-DC energy savings are sensitive to power system and appliance conversion efficiencies but are not significantly influenced by climate. While direct-DC for residential applications will most likely arise as a spin-off of developments in the commercial sector—because of lower barriers to market entry and larger energy benefits resulting from the higher coincidence between load and insolation—this paper demonstrates that there are substantial benefits in the residential sector as well. Among residential applications, space cooling derives the largest energy savings from being delivered by a direct-DC system. It is the largest load for the average residence on a national basis and is particularly so in high-load regions. It is also the load with highest solar coincidence.

Garbesi, Karina; Vossos, Vagelis; Sanstad, Alan; Burch, Gabriel

2011-10-13T23:59:59.000Z

278

Cone-based electrical resistivity tomography Adam Pidlisecky1  

E-Print Network [OSTI]

Cone-based electrical resistivity tomography Adam Pidlisecky1 , Rosemary Knight1 , and Eldad Haber2 that can provide information about the 3D distribu- tion of electrical conductivity. The technique, cone-bert method. C-bert data are inverted using an inexact Gauss-Newton algorithm to produce a 3D electrical

Knight, Rosemary

279

CHARACTERIZATION OF UNDOPED HIGH RESISTIVITY CdTe GROWN BY A THM METHOD  

E-Print Network [OSTI]

185 CHARACTERIZATION OF UNDOPED HIGH RESISTIVITY CdTe GROWN BY A THM METHOD R. STUCK, J. C. MULLER techniques of cadmium tellu- ride crystals (CdTe) allowed to obtain high resistivity crystals of detector shape of the phase diagram of CdTe, it seemed interesting to characterize these materials in order

Paris-Sud XI, Université de

280

AtMIN7 mediated disease resistance to Pseudomonas syringae in Arabidopsis  

DOE Patents [OSTI]

The present invention relates to compositions and methods for enhancing plant defenses against pathogens. More particularly, the invention relates to enhancing plant immunity against bacterial pathogens, wherein AtMIN7 mediated protection is enhanced and/or there is a decrease in activity of an AtMIN7 associated virulence protein such as a Pseudomonas syringae pv. tomato DC3000 HopM1. Reagents of the present invention provide a means of studying cellular trafficking while formulations of the present inventions provide increased pathogen resistance in plants.

He, Sheng Yang (Okemos, MI); Nomura, Kinya (East Lansing, MI)

2011-07-26T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

A high temperature diffraction-resistance study of chalcopyrite, CuFeS{sub 2}  

SciTech Connect (OSTI)

The electrical, magnetic and structural properties of synthetic chalcopyrite, CuFeS{sub 2}, have been studied up to 873 K using DC resistance measurements performed in-situ during neutron powder diffraction experiments. Under ambient conditions the material adopts the accepted structural model for CuFeS{sub 2} in the space group I4-bar 2d, with the magnetic moment of the Fe{sup 3+} cations aligned along [001]. The electrical resistivity is around 0.3 {Omega} cm under ambient conditions, consistent with semiconductor character, and decreases slightly with increase in temperature until a more abrupt fall occurs in the region 750-800 K. This abrupt change in resistivity is accompanied by a structural transition to a cubic zinc blende structured phase (space group F4-bar 3m) in which Cu{sup +} and Fe{sup 3+} cations are disordered over the same tetrahedral crystallographic sites and by a simultaneous loss of long-range magnetic order. The implications of these results are discussed in the context of previous studies of the chalcopyrite system. - Graphical abstract: Structural, magnetic and electrical properties of CuFeS{sub 2} to 873 K have been investigated using DC resistance measurements, performed in-situ during the collection of powder neutron diffraction data. Highlights: > Structural, magnetic and electronic properties are probed simultaneously. > A fall in resistivity at high temperatures is associated with cation disorder. > The order-disorder transition is accompanied by the loss of magnetic order. > The structural and magnetic phase transition is preceded by a 2-phase region. > Sulphur loss at high temperatures causes the phase transitions to be irreversible.

Engin, T.E. [Department of Chemistry, Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS (United Kingdom); ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom); Powell, A.V., E-mail: a.v.powell@hw.ac.uk [Department of Chemistry, Perkin Building, Heriot-Watt University, Edinburgh, EH14 4AS (United Kingdom); Hull, S. [ISIS Facility, STFC Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX (United Kingdom)

2011-08-15T23:59:59.000Z

282

FTN4 OPTIMIZATION TECHNIQUES.  

E-Print Network [OSTI]

3 1st Edition FTN4 OPTIMIZATION TECHNIQUES November 1979O. INTRODUCTION 1. COt1PILER OPTIMIZATIONS 2. SOURCE CODEcode. Most of these optimizations decrease central processor

Authors, Various

2012-01-01T23:59:59.000Z

283

Abrasion resistant composition  

DOE Patents [OSTI]

A surface covering composition of abrasion resistant character adapted for disposition in overlying bonded relation to a metal substrate. The surface covering composition includes metal carbide particles within a metal matrix at a packing factor of not less than about 0.6. Not less than about 40 percent by weight of the metal carbide particles are characterized by an effective diameter in the range of +14-32 mesh prior to introduction to the metal matrix. Not less than about 3 percent by weight of the metal carbide particles are characterized by an effective diameter of +60 mesh prior to introduction to the metal matrix.

Fischer, Keith D; Barnes, Christopher A; Henderson, Stephen L

2014-05-13T23:59:59.000Z

284

Corrosion-resistant uranium  

DOE Patents [OSTI]

The present invention is directed to the protecting of uranium and uranium alloy articles from corrosion by providing the surfaces of the articles with a layer of an ion-plated metal selected from aluminum and zinc to a thickness of at least 60 microinches and then converting at least the outer surface of the ion-plated layer of aluminum or zinc to aluminum chromate or zinc chromate. This conversion of the aluminum or zinc to the chromate form considerably enhances the corrosion resistance of the ion plating so as to effectively protect the coated article from corrosion.

Hovis, V.M. Jr.; Pullen, W.C.; Kollie, T.G.; Bell, R.T.

1981-10-21T23:59:59.000Z

285

Corrosion-resistant uranium  

DOE Patents [OSTI]

The present invention is directed to the protecting of uranium and uranium alloy articles from corrosion by providing the surfaces of the articles with a layer of an ion-plated metal selected from aluminum and zinc to a thickness of at least 60 microinches and then converting at least the outer surface of the ion-plated layer of aluminum or zinc to aluminum chromate or zinc chromate. This conversion of the aluminum or zinc to the chromate form considerably enhances the corrosion resistance of the ion plating so as to effectively protect the coated article from corrosion.

Hovis, Jr., Victor M. (Kingston, TN); Pullen, William C. (Knoxville, TN); Kollie, Thomas G. (Oak Ridge, TN); Bell, Richard T. (Knoxville, TN)

1983-01-01T23:59:59.000Z

286

Resistive-ideal  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear Security Administration the1 -the Mid-Infrared atEffectquestionnairesU.S.Resistive-ideal transition of

287

Trapped-ion cell with improved DC potential harmonicity for FT-ICR MS  

SciTech Connect (OSTI)

The trapped-ion cell is a key component critical for optimal performance in Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometry (MS). We have upgraded our 12 Tesla FT-ICR instrument with a new open cylindrical cell that includes four additional cylindrical segments that serve as compensation electrodes. The DC potential on the additional segments can be set to specific pre-calculated values to suppress DC trapping field anharmonicity, in an effort to improve coherence of the ion cyclotron motion and minimize deviations from the calibration function of the ideal cell. Alternatively, the compensation potentials can be set equal to potentials of adjacent cell electrodes, which creates a DC potential distribution equivalent to that of a regular open cylindrical cell. The initial experimental characterization of both the compensated and open cell configurations was performed using ESI direct infusion of a peptide mixture. Operating the compensated cell at increased post-excitation radii resulted in improved mass measurement accuracy together with increased signal intensity, while the regular configuration exhibited peak splitting and reduced signal life time under these operating conditions. The observed improvement of the compensated cell performance was consistent with the expected behavior due to the improved DC potential harmonicity. These results confirm that the trapping DC potential harmonicity is significant for optimizing FT-ICR MS performance.

Tolmachev, Aleksey V.; Robinson, Errol W.; Wu, Si; Kang, Hyuk; Lourette, Natacha M.; Pasa-Tolic, Ljiljana; Smith, Richard D.

2008-04-01T23:59:59.000Z

288

Oxidation Resistant Graphite Studies  

SciTech Connect (OSTI)

The Very High Temperature Reactor (VHTR) Graphite Research and Development Program is investigating doped nuclear graphite grades exhibiting oxidation resistance. During a oxygen ingress accident the oxidation rates of the high temperature graphite core region would be extremely high resulting in significant structural damage to the core. Reducing the oxidation rate of the graphite core material would reduce the structural effects and keep the core integrity intact during any air-ingress accident. Oxidation testing of graphite doped with oxidation resistant material is being conducted to determine the extent of oxidation rate reduction. Nuclear grade graphite doped with varying levels of Boron-Carbide (B4C) was oxidized in air at nominal 740°C at 10/90% (air/He) and 100% air. The oxidation rates of the boronated and unboronated graphite grade were compared. With increasing boron-carbide content (up to 6 vol%) the oxidation rate was observed to have a 20 fold reduction from unboronated graphite. Visual inspection and uniformity of oxidation across the surface of the specimens were conducted. Future work to determine the remaining mechanical strength as well as graphite grades with SiC doped material are discussed.

W. Windes; R. Smith

2014-07-01T23:59:59.000Z

289

Resistive hydrogen sensing element  

DOE Patents [OSTI]

Systems and methods are described for providing a hydrogen sensing element with a more robust exposed metallization by application of a discontinuous or porous overlay to hold the metallization firmly on the substrate. An apparatus includes: a substantially inert, electrically-insulating substrate; a first Pd containing metallization deposited upon the substrate and completely covered by a substantially hydrogen-impermeable layer so as to form a reference resistor on the substrate; a second Pd containing metallization deposited upon the substrate and at least a partially accessible to a gas to be tested, so as to form a hydrogen-sensing resistor; a protective structure disposed upon at least a portion of the second Pd containing metallization and at least a portion of the substrate to improve the attachment of the second Pd containing metallization to the substrate while allowing the gas to contact said the second Pd containing metallization; and a resistance bridge circuit coupled to both the first and second Pd containing metallizations. The circuit determines the difference in electrical resistance between the first and second Pd containing metallizations. The hydrogen concentration in the gas may be determined. The systems and methods provide advantages because adhesion is improved without adversely effecting measurement speed or sensitivity.

Lauf, Robert J. (Oak Ridge, TN)

2000-01-01T23:59:59.000Z

290

Contamination Control Techniques  

SciTech Connect (OSTI)

Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.

EBY, J.L.

2000-05-16T23:59:59.000Z

291

A NOVEL TECHNIQUE TO GENERATE SHARP CRACKS IN METALLIC/CERAMIC FUNCTIONALLY GRADED  

E-Print Network [OSTI]

materials with high fracture toughness and elevated temperature resistance. Ideally, the ceramic side of the FGM provides thermal and corrosion resistance while the metallic side gives the necessary strengthA NOVEL TECHNIQUE TO GENERATE SHARP CRACKS IN METALLIC/CERAMIC FUNCTIONALLY GRADED MATERIALS

Paulino, Glaucio H.

292

The electrical resistivity method in cased boreholes  

SciTech Connect (OSTI)

The use of downhole current sources in resistivity mapping can greatly enhance the detection and delineation of subsurface features. The purpose of this work is to examine the resistivity method for current sources in wells cased with steel. The resistivity method in cased boreholes with downhole current sources is investigated using the integral equation (IE) technique. The casing and other bodies are characterized as conductivity inhomogeneities in a half-space. For sources located along the casing axis, an axially symmetric Green's function is used to formulate the surface potential and electric field (E-field) volume integral equations. The situations involving off-axis current sources and three-dimensional (3-D) bodies is formulated using the surface potential IE method. The solution of the 3-D Green's function is presented in cylindrical and Cartesian coordinate systems. The methods of moments is used to solve the Fredholm integral equation of the second kind for the response due to the casing and other bodies. The numerical analysis revealed that the current in the casing can be approximated by its vertical component except near the source and the axial symmetric approximation of the casing is valid even for the 3-D problem. The E-field volume IE method is an effective and efficient technique to simulate the response of the casing in a half-space, whereas the surface potential approach is computationally better when multiple bodies are involved. Analyzing several configurations of the current source indicated that the casing response is influenced by four characteristic factors: conduction length, current source depth,casing depth, and casing length. 85 refs., 133 figs., 11 tabs.

Schenkel, C.J.

1991-05-01T23:59:59.000Z

293

Development of 500 kV DC PPLP-insulated oil-filled submarine cable  

SciTech Connect (OSTI)

This paper outlines the development of a 500 kV DC oil-filled submarine cable capable of transmitting 2,800 MW with {+-} 500 kV 2800A bipole system. Polypropylene Laminated Paper (PPL) was employed as the insulation material, which is the worlds first application to DC cables. The conductor size is 3,000 mm{sup 2}, which is the largest size for submarine cables ever put into practical use. Through various fundamental and prototype tests, the cable proved to have excellent electrical characteristics for DC voltage as well as transient overvoltage. The cable and accessories are currently undergoing a long-term accelerated aging test as the final confirmation of their reliability and stability.

Fujimori, A. [Kansai Electric Power Co., Inc., Osaka (Japan)] [Kansai Electric Power Co., Inc., Osaka (Japan); Tanaka, T. [Electric Power Development Co., Ltd., Tokyo (Japan)] [Electric Power Development Co., Ltd., Tokyo (Japan); Takashima, H. [Shikoku Electric Power Co., Inc., Kagawa (Japan)] [Shikoku Electric Power Co., Inc., Kagawa (Japan); Imajo, T. [Central Research Inst. of Electric Power Industry, Tokyo (Japan)] [Central Research Inst. of Electric Power Industry, Tokyo (Japan); Hata, R. [Sumitomo Electric Industries, Ltd., Osaka (Japan)] [Sumitomo Electric Industries, Ltd., Osaka (Japan); Tanabe, T. [Furukawa Electric Co., Ltd., Tokyo (Japan)] [Furukawa Electric Co., Ltd., Tokyo (Japan); Yoshida, S. [Fujikura, Ltd., Tokyo (Japan)] [Fujikura, Ltd., Tokyo (Japan); Kakihana, T. [Hitachi Cable, Ltd., Tokyo (Japan)] [Hitachi Cable, Ltd., Tokyo (Japan)

1996-01-01T23:59:59.000Z

294

Method for in-situ restoration of platinum resistance thermometer calibration  

DOE Patents [OSTI]

A method is provided for in-situ restoration of platinum resistance thermometers (PRT's) that have undergone surface oxide contamination and/or stain-related damage causing decalibration. The method, which may be automated using a programmed computer control arrangement, consists of applying a dc heating current to the resistive sensing element of the PRT of sufficient magnitude to heat the element to an annealing temperature and maintaining the temperature for a specified period to restore the element to a stress-free calibration condition. The process anneals the sensing element of the PRT without subjecting the entire PRT assembly to the annealing temperature and may be used in the periodic maintenance of installed PRT's. 1 fig.

Carroll, R.M.

1987-10-23T23:59:59.000Z

295

Method for in-situ restoration of plantinum resistance thermometer calibration  

DOE Patents [OSTI]

A method is provided for in-situ restoration of platinum resistance thermometers (PRT's) that have undergone surface oxide contamination and/or strain-related damage causing decalibration. The method, which may be automated using a programmed computer control arrangement, consists of applying a dc heating current to the resistive sensing element of the PRT of sufficient magnitude to heat the element to an annealing temperature and maintaining the temperature for a specified period to restore the element to a stress-free calibration condition. The process anneals the sensing element of the PRT without subjecting the entire PRT assembly to the annealing temperature and may be used in the periodic maintenance of installed PRT's.

Carroll, Radford M. (Oak Ridge, TN)

1989-01-01T23:59:59.000Z

296

Solid Silicone Elastomer Material(DC745U)-Historical Overview and New Experimental Results  

SciTech Connect (OSTI)

DC745U is a silicone elastomer used in several weapon systems. DC745U is manufactured by Dow Corning and its formulation is proprietary. Risk changes without notification to the customer. {sup 1}H and {sup 29}Si{l_brace}{sup 1}H{r_brace} NMR have previously determined that DC745U contains {approx} 98.5% dimethyl siloxane, {approx}1.5% methyl-phenyl siloxane, and a small amount (<1%) of vinyl siloxane repeat units that are converted to crosslinking sites. The polymer is filled with {approx} 38 wt.% of a mixture of fumed silica and quartz. Some conclusions are: (1) DMA shows that crystallization does have an effect on the mechanical properties of DC745U; (2) DMA shows that the crystallization is time and temperature dependent; (3) Mechanical tests show that DC745U undergo a crystalline transition at temperatures below -50 C; (4) Rate and temperature does not have an effect above crystalline transition; (5) Crystalline transition occurs faster at colder temperatures; (6) The material remains responsive and recovers after warming it to temperature above -40 C; (7) We were able to review all previous historical data on DC745U; (8) Identified specific gaps in materials understanding; (9) Developed design of experiments and testing methods to address gaps associated with post-curing and low temperature mechanical behavior; (10) Resolved questions of post-cure and alleviated concerns associated with low temperature mechanical behavior with soak time and temperature; and (11) This work is relevant to mission-critical programs and for supporting programmatic work for weapon research.

Ortiz-Acosta, Denisse [Los Alamos National Laboratory

2012-08-08T23:59:59.000Z

297

Impact of contact and access resistances in graphene field-effect transistors on quartz substrates for radio frequency applications  

SciTech Connect (OSTI)

High-frequency performance of graphene field-effect transistors (GFETs) has been limited largely by parasitic resistances, including contact resistance (R{sub C}) and access resistance (R{sub A}). Measurement of short-channel (500?nm) GFETs with short (200?nm) spin-on-doped source/drain access regions reveals negligible change in transit frequency (f{sub T}) after doping, as compared to ?23% f{sub T} improvement for similarly sized undoped GFETs measured at low temperature, underscoring the impact of R{sub C} on high-frequency performance. DC measurements of undoped/doped short and long-channel GFETs highlight the increasing impact of R{sub A} for larger GFETs. Additionally, parasitic capacitances were minimized by device fabrication using graphene transferred onto low-capacitance quartz substrates.

Ramón, Michael E., E-mail: michael.ramon@utexas.edu, E-mail: hemacp@utexas.edu; Movva, Hema C. P., E-mail: michael.ramon@utexas.edu, E-mail: hemacp@utexas.edu; Fahad Chowdhury, Sk.; Parrish, Kristen N.; Rai, Amritesh; Akinwande, Deji; Banerjee, Sanjay K. [Microelectronics Research Center, Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, Texas 78758 (United States); Magnuson, Carl W.; Ruoff, Rodney S. [Department of Mechanical Engineering and the Materials Science and Engineering Program, The University of Texas at Austin, Austin, Texas 78712 (United States)

2014-02-17T23:59:59.000Z

298

Child Guidance Techniques.  

E-Print Network [OSTI]

TDOC Z TA24S.7 8873 NO.1314 Child Guidance Techniques The Texas MM University System ~ Texas Agricultural Extension Service DMia! C. Pfannstiel . Director College Station B-1314 ... 2 Contents Helpful Guidance T echniques...

Fraiser, Roberta C.

1982-01-01T23:59:59.000Z

299

Corrosion resistant PEM fuel cell  

DOE Patents [OSTI]

A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particles. The substrate may have an oxidizable metal first layer (e.g., stainless steel) underlying the polymer coating.

Fronk, Matthew Howard (Honeoye Falls, NY); Borup, Rodney Lynn (East Rochester, NY); Hulett, Jay S. (Rochester, NY); Brady, Brian K. (North Chili, NY); Cunningham, Kevin M. (Romeo, MI)

2002-01-01T23:59:59.000Z

300

Corrosion resistant PEM fuel cell  

DOE Patents [OSTI]

A PEM fuel cell having electrical contact elements comprising a corrosion-susceptible substrate metal coated with an electrically conductive, corrosion-resistant polymer containing a plurality of electrically conductive, corrosion-resistant filler particles. The substrate may have an oxidizable metal first layer (e.g., stainless steel) underlying the polymer coating.

Fronk, Matthew Howard (Honeoye Falls, NY); Borup, Rodney Lynn (East Rochester, NY); Hulett, Jay S. (Rochester, NY); Brady, Brian K. NY); Cunningham, Kevin M. (Romeo, MI)

2011-06-07T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Heat Transfer and Cooling Techniques at Low Temperature  

E-Print Network [OSTI]

The first part of this chapter gives an introduction to heat transfer and cooling techniques at low temperature. We review the fundamental laws of heat transfer (conduction, convection and radiation) and give useful data specific to cryogenic conditions (thermal contact resistance, total emissivity of materials and heat transfer correlation in forced or boiling flow for example) used in the design of cooling systems. In the second part, we review the main cooling techniques at low temperature, with or without cryogen, from the simplest ones (bath cooling) to the ones involving the use of cryocoolers without forgetting the cooling flow techniques.

Baudouy, B

2014-01-01T23:59:59.000Z

302

Control of current and voltage oscillations in a short dc discharge making use of external auxiliary electrode  

E-Print Network [OSTI]

Control of current and voltage oscillations in a short dc discharge making use of external://rsi.aip.org/about/rights_and_permissions #12;REVIEW OF SCIENTIFIC INSTRUMENTS 83, 103502 (2012) Control of current and voltage oscillations October 2012) A dc discharge with a hot cathode is subject to current and voltage plasma oscillations

Kaganovich, Igor

303

The DC field components of horizontal and vertical electric dipole sources immersed in three-layered stratified media  

E-Print Network [OSTI]

for the solution in the case of horizontal electric dipole (HED) radiation source and the single-component HertzThe DC field components of horizontal and vertical electric dipole sources immersed in three- ponents of the static (DC) fields of horizontal electric dipoles ( HEDs) and vertical electric dipoles

Boyer, Edmond

304

Superconductivity for Electric Systems Annual Peer Review Washington, DC July 27-29, 2004. OAK RIDGE NATIONAL LABORATORY  

E-Print Network [OSTI]

Superconductivity for Electric Systems Annual Peer Review Washington, DC ­ July 27-29, 2004. OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY American Superconductor Corporation U. Schoop, M. W&D support #12;Superconductivity for Electric Systems Annual Peer Review Washington, DC ­ July 27-29, 2004

305

New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos Jr.  

E-Print Network [OSTI]

New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos microgrid is that it has higher efficiency and lesser power conversion. In this work is proposed a new integrated power electronics converter able to connect a Distributed Generation (DG) unit with a hybrid dc

Zhou, Yaoqi

306

Abstract--Environmentally friendly technologies such as photovoltaics and fuel cells are DC sources. In the current power  

E-Print Network [OSTI]

Abstract--Environmentally friendly technologies such as photovoltaics and fuel cells are DC sources in pollution [1]. The most well-known green technologies include photovoltaics and wind turbines. Although fuel, fuel cells and photovoltaics, produce direct current (DC). Currently, power system infrastructures

Tolbert, Leon M.

307

Electro-osmotic infusion for joule heating soil remediation techniques  

DOE Patents [OSTI]

Electro-osmotic infusion of ground water or chemically tailored electrolyte is used to enhance, maintain, or recondition electrical conductivity for the joule heating remediation technique. Induced flows can be used to infuse electrolyte with enhanced ionic conductivity into the vicinity of the electrodes, maintain the local saturation of near-electrode regions and resaturate a partially dried out zone with groundwater. Electro-osmotic infusion can also tailor the conductivity throughout the target layer by infusing chemically modified and/or heated electrolyte to improve conductivity contrast of the interior. Periodic polarity reversals will prevent large pH changes at the electrodes. Electro-osmotic infusion can be used to condition the electrical conductivity of the soil, particularly low permeability soil, before and during the heating operation. Electro-osmotic infusion is carried out by locating one or more electrodes adjacent the heating electrodes and applying a dc potential between two or more electrodes. Depending on the polarities of the electrodes, the induced flow will be toward the heating electrodes or away from the heating electrodes. In addition, electrodes carrying a dc potential may be located throughout the target area to tailor the conductivity of the target area.

Carrigan, Charles R. (Tracy, CA); Nitao, John J. (Castro Valley, CA)

1999-01-01T23:59:59.000Z

308

In situ strain monitoring of fiber-reinforced polymers using embedded piezoresistive nanocomposites  

E-Print Network [OSTI]

strain-free DC resistance and EIS equivalent circuit elementthe EIS equivalent circuit elements and DC resistance are ?EIS equivalent circuit parameters and the DC resistance for

Loyola, Bryan R.; Saponara, Valeria; Loh, Kenneth J.

2010-01-01T23:59:59.000Z

309

A Five-Level Three-Phase Hybrid Cascade Multilevel Inverter Using a Single DC Source  

E-Print Network [OSTI]

A Five-Level Three-Phase Hybrid Cascade Multilevel Inverter Using a Single DC Source for a PM to construct a 3-phase 5-level cascade multilevel inverter to be used as a drive for a PM traction motor. The 5-level inverter consists of a standard 3-leg inverter (one leg for each phase) and an H-bridge in series

Tolbert, Leon M.

310

INVESTIGATION OF ELECTRIC CONDITIONS IN THE VICINITY OF CARBON NANOTUBES GROWN IN A DC PLASMA SHEATH  

E-Print Network [OSTI]

nanotubes (CNTs ­ long tubular carbon nanostructures) belong to the best electron field emitting materials, such as nanoelectronics devices or mechanical reinforcement in composite materials [2,3]. The field emission propertiesINVESTIGATION OF ELECTRIC CONDITIONS IN THE VICINITY OF CARBON NANOTUBES GROWN IN A DC PLASMA

Boyer, Edmond

311

Electron-deformation mechanism of photoexcitation of hypersound in semiconductors in a dc electric field  

SciTech Connect (OSTI)

The effect of a dc electric field on photoexcitation of a hypersonic pulse in a semiconductor via an electron-deformation mechanism is studied. The profiles of acoustic pulses are simulated for different directions of the electric field. (laser applications and other topics in quantum electronics)

Chigarev, N V [International Laser Center, M. V. Lomonosov Moscow State University, Moscow (Russian Federation)

2002-09-30T23:59:59.000Z

312

Observation and cancellation of the dc Stark shift in strontium optical lattice clocks  

E-Print Network [OSTI]

1 Observation and cancellation of the dc Stark shift in strontium optical lattice clocks J fre- quency shift at the 10-13 level by comparing two strontium optical lattice clocks. This frequency candidates for future optical frequency references. Among them, the development of strontium lattice clocks

Paris-Sud XI, Université de

313

Rotary Electrodynamics of a DC Motor: Motor as Mechanical Capacitor Lab 2: Modeling and System Identification  

E-Print Network [OSTI]

). · im is the current through the motor. Because the motor is in series with all other electrical). Because power is conserved, m = Kmim (motor efficiency is actually closer to 69%). Here, Km 0.00767 VRotary Electrodynamics of a DC Motor: Motor as Mechanical Capacitor Lab 2: Modeling and System

314

Copyright 2011 American Chemical Society 1155 Sixteenth Street N.W., Washington, DC 20036  

E-Print Network [OSTI]

Copyright © 2011 American Chemical Society 1155 Sixteenth Street N.W., Washington, DC 20036 For Selected: Application of Highly Ordered TiO2 Nanotube Arrays in Flexible Dye-Sensitized Solar Cells Daibin Light-Emitting Diodes on Solution-Processed Graphene Transparent Electrodes Junbo Wu, Mukul Agrawal, H

Aksay, Ilhan A.

315

A Comparison of the AC and DC Power Flow Models for LMP Calculations  

E-Print Network [OSTI]

A Comparison of the AC and DC Power Flow Models for LMP Calculations Thomas J. Overbye, Xu Cheng power flow model for LMP-based market calculations. The paper first provides a general discussion of balanced, three phase, electric power transmission networks is through the solution of the power flow. From

316

Use of Facility Contractor Employees for Services to DOE in the Washington, D.C., Area  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To clarify and modify policies and procedures for management of Department of Energy (DOE), including National Nuclear Security Administration (NNSA), facility contractor employees located in the Washington, D.C., area. Cancels DOE N 350.5. Certified 12-28-06. Canceled by DOE O 350.2A.

2001-07-12T23:59:59.000Z

317

Electrical detection of spin pumping: dc voltage generated by ferromagnetic resonance at ferromagnet/nonmagnet contact  

E-Print Network [OSTI]

Electrical detection of spin pumping: dc voltage generated by ferromagnetic resonance We describe electrical detection of spin pumping in metallic nanostructures. In the spin pumping effect, a precessing ferromagnet attached to a normal metal acts as a pump of spin-polarized current

van der Wal, Caspar H.

318

New Global Alliance Formed to Undercut Illegal WASHINGTON, DC, May 26, 2010 (ENS) -To reduce trade  

E-Print Network [OSTI]

New Global Alliance Formed to Undercut Illegal Logging WASHINGTON, DC, May 26, 2010 (ENS. "Some companies are not aware of the need to ask questions about the wood they are buying than on the performance of individual companies, and will complement existing initiatives that certify

319

Optical Investigations of Dust Particles Distribution in RF and DC Discharges  

SciTech Connect (OSTI)

Optical emission spectroscopy is used to study dust particles movement and conditions of a formation of ordered plasma-dust structures in a capacitively coupled RF discharge. 3D binocular diagnostics of plasma-dust structures in dc discharge was made.

Ramazanov, T. S.; Dosbolayev, M. K.; Jumabekov, A. N.; Amangaliyeva, R. Zh. [Al-Farabi Kazakh National University, IETP, 96a Tole Bi St., Almaty 050012 (Kazakhstan); Filatova, I. I.; Azharonok, V. V. [B. I. Stepanov Institute of Physics NAS of Belarus, Nezavisimosti Ave., 68, 220072, Minsk (Belarus)

2008-09-07T23:59:59.000Z

320

Save the Date for ACES 2014! Washington D.C. | December 811, 2014  

E-Print Network [OSTI]

methods and experiences relating to Ecosystem Services. Specific themes to be ad dressed include that ACES: A Community on Ecosystem Services, in partner ship with the Ecosystem Markets Community and the Ecosystem Services Partnership, will host the ACES 2014 Conference in Washington, DC, December 811, 2014

Watson, Craig A.

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


321

Proceedings IEEE International Test Conference, Washington, DC, 1990 Generating Pseudo-Exhaustive Vectors for External Testing  

E-Print Network [OSTI]

Proceedings IEEE International Test Conference, Washington, DC, 1990 Generating Pseudo-Exhaustive Vectors for External Testing S. Hellebrand, H.-J. Wunderlich, O. F. Haberl Institute of Computer Design. Germany Abstract In the past years special chips for external test have been suc- cessfully used

Hellebrand, Sybille

322

Investigation of DC distribution by measuring and modelling power supply devices for buildings with PV  

E-Print Network [OSTI]

requiring power transformation components. Since any type of load can be potentially fed with direct current panels without any power transformation seems to be obvious, nevertheless, precise simulations needInvestigation of DC distribution by measuring and modelling power supply devices for buildings

Paris-Sud XI, Université de

323

Performance test results for the Eaton dc developmental power train in an electric test bed vehicle  

SciTech Connect (OSTI)

This report presents the results of the tests performed on a direct current (dc) power train in a test bed vehicle developed by the Eaton Corporation for the US Department of Energy (DOE). The tests were performed by EG and G Idaho, Inc. at the Idaho National Engineering Laboratory (INEL). The purpose of the INEL testing was to provide test results from which an evaluation of the performance capabilities of the Eaton dc power train could be made and compared with other vehicle propulsion systems. The planned tests were primarily oriented toward road testing, chassis dynamometer testing, and associated dynamometer coastdown tests for road loss determination. Range tests of the Eaton dc test bed vehicle using an ALCO 2200 lead acid battery pack, produced ranges of 97 km at 56 km/h (60 miles at 35 mph), 79 km at 72 km/h (49 miles at 45 mph), and 47 km at 88 km/h (29 miles at 55 mph). The corresponding net dc energy consumptions are 135 Wh/km (217 Wh/mile), 145 Wh/km (233 Wh/mile), and 178 Wh/km (287 Wh/mile). The energy consumption for the D-cycle test was 241 Wh/km (387 Wh/mile). 8 refs., 11 figs., 16 tabs.

Crumley, R.L.; Donaldson, M.R.

1987-09-01T23:59:59.000Z

324

D.C. WRRC Report No.41 DIRECTORY OF WATER-RELATED  

E-Print Network [OSTI]

D.C. WRRC Report No.41 #12;#12;DIRECTORY OF WATER-RELATED ORGANIZATIONS IN THE DISTRICT OF COLUMBIA 1982 Preparations of the directory was supported in part by Federal funds from the Office of Water. The directory of water-related organizations in the District of Columbia has been prepared as part

District of Columbia, University of the

325

Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith  

E-Print Network [OSTI]

Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith Sigurd Skogestad Introduction Research in fuel cells receives currently a lot of interest. Fuel cells can be used, in different. However, the dynamics of fuel cells has received comparatively less attention. Control of fuel cells

Skogestad, Sigurd

326

HIDDEN DAMAGE DETECTION FOR MAIN CABLES OF SUSPENSION BRIDGES INCORPORATING DC MAGNETIZATION WITH A SEARCH COIL-  

E-Print Network [OSTI]

with artificially inflicted broken wires. KEYWORDS : Cable NDE, Search coil, Total flux, DC magnetization, Damage. To overcome this limitation, this study proposes a noncontact cable inspection system incorporating been applied for the inspection of steel cables for ski lifts, elevators, and for other applications

Boyer, Edmond

327

Policy Research Working Paper 4844, World Bank, Washington DC, April 2009 Weakly Relative Poverty  

E-Print Network [OSTI]

Policy Research Working Paper 4844, World Bank, Washington DC, April 2009 Weakly Relative Poverty, 20433, USA Abstract: Prevailing measures of relative poverty are unchanged when all incomes grow that relax these assumptions. On calibrating our measures to national poverty lines and survey data, we find

Krivobokova, Tatyana

328

IEEE Photovoltaic Specialists Conference Washington, D.C., May 13-17, 1996  

E-Print Network [OSTI]

IEEE Photovoltaic Specialists Conference Washington, D.C., May 13-17, 1996 NICHE MARKETS FOR GRID-CONNECTED PHOTOVOLTAICS Howard Wenger Pacific Energy Group Walnut Creek, CA, USA Christy Herig & Roger Taylor National- Sited Photovoltaics (CSPV) in the United States. 1 The intent is to demonstrate markets that are cost

Perez, Richard R.

329

AC PV Modules Take a standard DC PV module and connect a microinverter  

E-Print Network [OSTI]

modules. These inverters range in power from 700 watts up to 1 megawatt. DC maximum system voltages can and up to 13 inverters for the 210 W version to be installed on the same AC output cable. home power 136, and secure a listing to UL1741 for a pre-assembled module/inverter device, and you have an AC PV module

Johnson, Eric E.

330

First National Conference on Carbon Sequestration Washington, DC, May 14-17, 2001  

E-Print Network [OSTI]

First National Conference on Carbon Sequestration Washington, DC, May 14-17, 2001 Caldeira, K for Research on Ocean Carbon Sequestration (DOCS) *Climate and Carbon Cycle Modeling Group, Lawrence Livermore carbon sequestration strategy. Therefore, we want to understand the effectiveness of oceanic injection

331

Living downtown in Washington, D.C. : defining residential community in the city center  

E-Print Network [OSTI]

In Washington D.C., as in many other American cities, a significant section of the downtown is distinguished by boarded-up buildings and vacant lots. In spite of traces of a city plan that could organize and accommodate a ...

Allen, Robin P. (Robin Porter)

1995-01-01T23:59:59.000Z

332

The dependence of instructional outcomes on individual differences: An example from DC circuits  

E-Print Network [OSTI]

of resistors, two consistent, contradictory response patterns were identified: a greater equivalent resistance always dissipates more power, and a lesser equivalent resistance always dissipates more power. After that less resistance meant more power improved, while the performance of the opposing group did

Heckler, Andrew F.

333

Covered Product Category: Residential Electric Resistance Water...  

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

Electric Resistance Water Heaters Covered Product Category: Residential Electric Resistance Water Heaters The Federal Energy Management Program (FEMP) sets Federal efficiency...

334

Galaxy Redshifts: Improved Techniques  

E-Print Network [OSTI]

This paper analyses the effects of random noise in determining errors and confidence levels for galaxy redshifts obtained by cross-correlation techniques. The main finding is that confidence levels have previously been overestimated, and errors inaccurately calculated in certain applications. New formul\\ae\\ are presented.

A. F. Heavens

1993-05-26T23:59:59.000Z

335

Infrared Inspection Techniques  

E-Print Network [OSTI]

. By means of a TV monitor tube, a thermal picture is formed where lighter parts represent areas with higher temperatures. Absolute temperature levels of objects can be measured with this technique from -300C to +20000C. A conventional camera is attached...

Hill, A. B.; Bevers, D. V.

1979-01-01T23:59:59.000Z

336

FACILITIES INSTRUCTIONS, STANDARDS, & TECHNIQUES  

E-Print Network [OSTI]

to the repair of hydraulic turbine runners and large pump impellers. Reclamation operates and maintains a wideFACILITIES INSTRUCTIONS, STANDARDS, & TECHNIQUES VOLUME 2-5 TURBINE REPAIR Internet Version variety of reaction and impulse turbines as well as axial flow, mixed flow, radial flow pumps and pump

Laughlin, Robert B.

337

Overlapping double etch technique for evaluation of metallic alloys to stress corrosion cracking  

DOE Patents [OSTI]

A double overlapping etch zone technique for evaluation of the resistance of metallic alloys to stress corrosion cracking. The technique involves evaluating the metallic alloy along the line of demarcation between an overlapping double etch zone and single etch zone formed on the metallic alloy surface.

Steeves, Arthur F. (Schenectady, NY); Stewart, James C. (Loudonville, NY)

1981-01-01T23:59:59.000Z

338

Overlapping double etch technique for evaluation of metallic alloys to stress corrosion cracking  

DOE Patents [OSTI]

A double overlapping etch zone technique for evaluation of the resistance of metallic alloys to stress corrosion cracking is described. The technique involves evaluating the metallic alloy along the line of demarcation between an overlapping double etch zone and single etch zone formed on the metallic alloy surface.

Not Available

1980-05-28T23:59:59.000Z

339

Reliability of lightning resistant overhead distribution lines  

SciTech Connect (OSTI)

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

340

Corrosion resistant neutron absorbing coatings  

DOE Patents [OSTI]

A method of forming a corrosion resistant neutron absorbing coating comprising the steps of spray or deposition or sputtering or welding processing to form a composite material made of a spray or deposition or sputtering or welding material, and a neutron absorbing material. Also a corrosion resistant neutron absorbing coating comprising a composite material made of a spray or deposition or sputtering or welding material, and a neutron absorbing material.

Choi, Jor-Shan; Farmer, Joseph C; Lee, Chuck K; Walker, Jeffrey; Russell, Paige; Kirkwood, Jon; Yang, Nancy; Champagne, Victor

2013-11-12T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Corrosion resistant neutron absorbing coatings  

DOE Patents [OSTI]

A method of forming a corrosion resistant neutron absorbing coating comprising the steps of spray or deposition or sputtering or welding processing to form a composite material made of a spray or deposition or sputtering or welding material, and a neutron absorbing material. Also a corrosion resistant neutron absorbing coating comprising a composite material made of a spray or deposition or sputtering or welding material, and a neutron absorbing material.

Choi, Jor-Shan (El Cerrito, CA); Farmer, Joseph C. (Tracy, CA); Lee, Chuck K. (Hayward, CA); Walker, Jeffrey (Gaithersburg, MD); Russell, Paige (Las Vegas, NV); Kirkwood, Jon (Saint Leonard, MD); Yang, Nancy (Lafayette, CA); Champagne, Victor (Oxford, PA)

2012-05-29T23:59:59.000Z

342

Query Optimization Techniques Class Hierarchies  

E-Print Network [OSTI]

Query Optimization Techniques Exploiting Class Hierarchies Sophie Cluet 1 Guido Moerkotte 2 1 INRIA Since the introduction of object base management systems (OBMS), many query optimization techniques tailored for object query languages have been proposed. They adapt known optimization techniques

Mannheim, Universität

343

Data:5df914dc-748a-4757-980d-c7fa8bd9d9fe | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office695810186 No revision has been approved for this page. It1f847bdc66d-c7fa8bd9d9fe No revision has been approved

344

Data:065fb21d-c75b-4a75-860e-13fd93d1dc6e | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Office of InspectorConcentratingRenewable Solutions6ae4e73fc No revision hasb9e2-8af452ac6862 Noa75-860e-13fd93d1dc6e

345

Data:Dc67dc28-a58d-434e-bd5b-bf00a13198f9 | Open Energy Information  

Open Energy Info (EERE)

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Pagec-01b596aa1744 No revisionDbdad3b1-04dc-40cd-843e-921faaade910 No revisionb82a5cccd0d8 No revision has been approved

346

Impact of quasi-dc currents on three-phase distribution transformer installations. Power Systems Technology Program  

SciTech Connect (OSTI)

This report summarizes a series of tests designed to determine the response of quasi-dc currents on three-phase power distribution transformers for electric power systems. In general, if the dc injection is limited to the primary side of a step-down transformer, significant harmonic distortion is noted and an increase in the reactive power demand results. For dc injection on the secondary (load) side of the step-down transformer the harmonic content at the secondary side is quite high and saturation occurs with a relatively low level of dc injection; however, the reactive power demand is significantly lower. These tests produced no apparent damage to the transformers. Transformer damage is dependent on the duration of the dc excitation, the level of the excitation, and on thermal characteristics of the transfer. The transformer response time is found to be much shorter than seen in power transformer tests at lower dc injection levels. This shorter response time suggests that the response time is strongly dependent on the injected current levels, and that higher levels of dc injection for shorter durations could produce very high reactive power demands and harmonic distortion within a few tenths of a second. The added reactive power load could result in the blowing of fuses on the primary side of the transformer for even moderate dc injection levels, and neutral currents are quite large under even low-level dc injection. This ``smoking neutral`` results in high-level harmonic injection into equipment via the neutral and in possible equipment failure.

McConnell, B.W.; Barnes, P.R. [Oak Ridge National Lab., TN (United States); Tesche, F.M. [Tesche (F.M.), Dallas, TX (United States); Schafer, D.A. [Mission Research Corp., Albuquerque, NM (United States)

1992-06-01T23:59:59.000Z

347

One Packaging Technique of Exposed MEMS Sensors  

Broader source: Energy.gov (indexed) [DOE]

D.C. Funded by the Energy Storage Systems Program of the U.S. Department Of Energy (DOEESS) through the Small Business Technology Transfer (STTR) program and managed by Sandia...

348

Resin infiltration transfer technique  

DOE Patents [OSTI]

A process has been developed for fabricating composite structures using either reaction forming or polymer infiltration and pyrolysis techniques to densify the composite matrix. The matrix and reinforcement materials of choice can include, but are not limited to, silicon carbide (SiC) and zirconium carbide (ZrC). The novel process can be used to fabricate complex, net-shape or near-net shape, high-quality ceramic composites with a crack-free matrix.

Miller, David V. (Pittsburgh, PA); Baranwal, Rita (Glenshaw, PA)

2009-12-08T23:59:59.000Z

349

Image compression technique  

DOE Patents [OSTI]

An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace`s equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image. 16 figs.

Fu, C.Y.; Petrich, L.I.

1997-03-25T23:59:59.000Z

350

Layered ultra-thin coherent structures used as electrical resistors having low temperature coefficient of resistivity  

DOE Patents [OSTI]

A thin film resistor having a controlled temperature coefficient of resistance (TCR) ranging from negative to positive degrees kelvin and having relatively high resistivity. The resistor is a multilayer superlattice crystal containing a plurality of alternating, ultra-thin layers of two different metals. TCR is varied by controlling the thickness of the individual layers. The resistor can be readily prepared by methods compatible with thin film circuitry manufacturing techniques.

Werner, Thomas R. (Argonne, IL); Falco, Charles M. (Tucson, AZ); Schuller, Ivan K. (Woodridge, IL)

1984-01-01T23:59:59.000Z

351

Ions in solution: Density corrected density functional theory (DC-DFT)  

SciTech Connect (OSTI)

Standard density functional approximations often give questionable results for odd-electron radical complexes, with the error typically attributed to self-interaction. In density corrected density functional theory (DC-DFT), certain classes of density functional theory calculations are significantly improved by using densities more accurate than the self-consistent densities. We discuss how to identify such cases, and how DC-DFT applies more generally. To illustrate, we calculate potential energy surfaces of HO·Cl{sup ?} and HO·H{sub 2}O complexes using various common approximate functionals, with and without this density correction. Commonly used approximations yield wrongly shaped surfaces and/or incorrect minima when calculated self consistently, while yielding almost identical shapes and minima when density corrected. This improvement is retained even in the presence of implicit solvent.

Kim, Min-Cheol; Sim, Eunji, E-mail: esim@yonsei.ac.kr [Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University, 50 Yonsei-ro Seodaemun-gu, Seoul 120-749 (Korea, Republic of)] [Department of Chemistry and Institute of Nano-Bio Molecular Assemblies, Yonsei University, 50 Yonsei-ro Seodaemun-gu, Seoul 120-749 (Korea, Republic of); Burke, Kieron [Department of Chemistry, University of California, Irvine, California 92697 (United States)] [Department of Chemistry, University of California, Irvine, California 92697 (United States)

2014-05-14T23:59:59.000Z

352

Demonstration of Cathode Emittance Dominated High Bunch Charge Beams in a DC gun-based Photoinjector  

E-Print Network [OSTI]

We present the results of transverse emittance and longitudinal current profile measurements of high bunch charge (greater than or equal to 100 pC) beams produced in the DC gun-based Cornell Energy Recovery Linac Photoinjector. In particular, we show that the cathode thermal and core beam emittances dominate the final 95% and core emittance measured at 9-9.5 MeV. Additionally, we demonstrate excellent agreement between optimized 3D space charge simulations and measurement, and show that the quality of the transverse laser distribution limits the optimal simulated and measured emittances. These results, previously thought achievable only with RF guns, demonstrate that DC gun based photoinjectors are capable of delivering beams with sufficient single bunch charge and beam quality suitable for many current and next generation accelerator projects such as Energy Recovery Linacs (ERLs) and Free Electron Lasers (FELs).

Gulliford, Colwyn; Bazarov, Ivan; Dunham, Bruce; Cultrera, Luca

2015-01-01T23:59:59.000Z

353

Switch contact device for interrupting high current, high voltage, AC and DC circuits  

DOE Patents [OSTI]

A high voltage switch contact structure capable of interrupting high voltage, high current AC and DC circuits. The contact structure confines the arc created when contacts open to the thin area between two insulating surfaces in intimate contact. This forces the arc into the shape of a thin sheet which loses heat energy far more rapidly than an arc column having a circular cross-section. These high heat losses require a dramatic increase in the voltage required to maintain the arc, thus extinguishing it when the required voltage exceeds the available voltage. The arc extinguishing process with this invention is not dependent on the occurrence of a current zero crossing and, consequently, is capable of rapidly interrupting both AC and DC circuits. The contact structure achieves its high performance without the use of sulfur hexafluoride.

Via, Lester C.; Witherspoon, F. Douglas; Ryan, John M.

2005-01-04T23:59:59.000Z

354

Efficiency consideration of DC link soft-switching inverters for motor drive applications  

SciTech Connect (OSTI)

This paper critically evaluates efficiency of soft switching inverters including an actively clamped resonant dc link inverter and a clamped-mode resonant pole inverter. An analytical approach to evaluating efficiency of the clamped-mode soft switching inverter has been developed. The evaluation results are compared with that of the standard pulse-width-modulation (PWM) inverter. A 50-kW induction motor is used as the variable load, and the inverter efficiency is evaluated under different speed and torque conditions. The clamped-mode soft-switching inverter, although eliminating the switching loss, shows poor efficiency over the entire load range. Under low load conditions, the efficiency profile is even worse. The actively clamped resonant dc link inverter shows highest efficiency over the entire speed and torque range. However, its energy saving over the standard PWM inverter is marginal under full load or high speed conditions.

Lai, J.S.; Young, R.W.; McKeever, J.W.

1994-12-31T23:59:59.000Z

355

Parallel 3D Finite Element Numerical Modelling of DC Electron Guns  

SciTech Connect (OSTI)

In this paper we present Gun3P, a parallel 3D finite element application that the Advanced Computations Department at the Stanford Linear Accelerator Center is developing for the analysis of beam formation in DC guns and beam transport in klystrons. Gun3P is targeted specially to complex geometries that cannot be described by 2D models and cannot be easily handled by finite difference discretizations. Its parallel capability allows simulations with more accuracy and less processing time than packages currently available. We present simulation results for the L-band Sheet Beam Klystron DC gun, in which case Gun3P is able to reduce simulation time from days to some hours.

Prudencio, E.; Candel, A.; Ge, L.; Kabel, A.; Ko, K.; Lee, L.; Li, Z.; Ng, C.; Schussman, G.; /SLAC

2008-02-04T23:59:59.000Z

356

DC-like Phase Space Manipulation and Particle Acceleration Using Chirped AC Fields  

SciTech Connect (OSTI)

Waves in plasmas can accelerate particles that are resonant with the wave. A DC electric field also accelerates particles, but without a resonance discrimination, which makes the acceleration mechanism profoundly different. We investigate the effect on a Hamiltonian distribution of an accelerating potential waveform, which could, for example, represent the average ponderomotive effect of two counterpropagating electromagnetic waves. In particular, we examine the apparent DC-like time-asymptotic response of the distribution in regimes where the potential structure is accelerated adiabatically. A highly resonant population within the distribution is always present, and we characterize its nonadiabatic response during wave-particle resonance using an integral method in the noninertial reference frame moving with the wave. Finally, we show that in the limit of infinitely slow acceleration of the wave, these highly resonant particles disappear and the response

P.F. Schmit and N.J. Fisch

2009-06-17T23:59:59.000Z

357

Oxidation resistant alloys, method for producing oxidation resistant alloys  

DOE Patents [OSTI]

A method for producing oxidation-resistant austenitic alloys for use at temperatures below 800 C. comprising of: providing an alloy comprising, by weight %: 14-18% chromium, 15-18% nickel, 1-3% manganese, 1-2% molybdenum, 2-4% silicon, 0% aluminum and the balance being iron; heating the alloy to 800 C. for between 175-250 hours prior to use in order to form a continuous silicon oxide film and another oxide film. The method provides a means of producing stainless steels with superior oxidation resistance at temperatures above 700 C. at a low cost

Dunning, John S.; Alman, David E.

2002-11-05T23:59:59.000Z

358

Method of measuring the dc electric field and other tokamak parameters  

DOE Patents [OSTI]

A method including externally imposing an impulsive momentum-space flux to perturb hot tokamak electrons thereby producing a transient synchrotron radiation signal, in frequency-time space, and the inference, using very fast algorithms, of plasma parameters including the effective ion charge state Z.sub.eff, the direction of the magnetic field, and the position and width in velocity space of the impulsive momentum-space flux, and, in particular, the dc toroidal electric field.

Fisch, Nathaniel J. (Princeton, NJ); Kirtz, Arnold H. (Princeton Junction, NJ)

1992-01-01T23:59:59.000Z

359

Round-robin artificial contamination test on high voltage dc insulators  

SciTech Connect (OSTI)

This paper summarizes the results of a worldwide round-robin test of high voltage dc (HVDC) insulators, which was carried out in six laboratories aiming at standardization of the method for artificial contamination tests on HVDC insulators. Flashover characteristics of three kinds of specimens were evaluated by the clean fog and the salt fog procedures. Sufficient information is now available to allow the preparation of provisional international specifications for artificial contamination testing of HVDC insulators.

Naito, K.; Schneider, H.M.

1995-07-01T23:59:59.000Z

360

Development studies of a solid-state d.c. circuit breaker based on the GTO  

E-Print Network [OSTI]

Circuit Breaker . . . . . 37 D. Metal-Oxide Varistors in DC Circuit Breaker Applications 42 E. Variable Resistor Characteristics Implemented with a Semiconductor Device . . . . . . . . . . . 43 VI CAPACITIVE CIRCUIT BREAKER 45 VII SWITCHED SNUBBER... maintenance rate and low reliability. The separation of contacts under load draws an electric arc at a relatively high d. c. voltage which serves to dissipate the circuit stored energy. Because of this, the metal contacts suffer from pitting and erosion...

Kernaghan, William Henry

1986-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "technique dc resistivity" 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

Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front  

DOE Patents [OSTI]

Method and apparatus for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing.

Dawson, John M. (Pacific Palisades, CA); Mori, Warren B. (Hermosa Beach, CA); Lai, Chih-Hsiang (So. Pasadena, CA); Katsouleas, Thomas C. (Malibu, CA)

1998-01-01T23:59:59.000Z

362

Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front  

DOE Patents [OSTI]

Method and apparatus ar disclosed for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing. 4 figs.

Dawson, J.M.; Mori, W.B.; Lai, C.H.; Katsouleas, T.C.

1998-07-14T23:59:59.000Z

363

DC WRRC Report No. 76 Assessment of the Impact of Non-Point Source Pollution on the Anacostia River  

E-Print Network [OSTI]

Model for Urban Water Quality (AMUWQ, Geological Survey, through the D.C. Water Resources Research Center." "The Contents of the publication do of trade names or commercial products constitute their endorsement by the United States Government." #12

District of Columbia, University of the

364

Residential Energy Efficiency Research Planning Meeting Summary Report: Washington, D.C. - October 27-28, 2011  

SciTech Connect (OSTI)

This report summarizes key findings and outcomes from the U.S. Department of Energy's Building America Residential Energy Efficiency Research Planning meeting, held on October 28-29, 2011, in Washington, D.C.

Not Available

2012-02-01T23:59:59.000Z

365

Quantitative study of macroscopic quantum tunneling in a dc SQUID: A system with two degrees of freedom  

E-Print Network [OSTI]

To test whether the theory of macroscopic quantum tunneling (MQT) is applicable to systems with 2 degrees of freedom, we experimentally investigated the switching current distribution of a dc SQUID. Using sample parameters determined from...

Li, Shaoxiong; Yu, Yang; Zhang, Y.; Qiu, W.; Han, Siyuan; Wang, Z.

2002-08-01T23:59:59.000Z

366

Vehicle Technologies Office Merit Review 2014: DC Fast Charging Effects on Battery Life and EVSE Efficiency and Security Testing  

Broader source: Energy.gov [DOE]

Presentation given by Idaho National Laboratory at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about DC fast charging...

367

A High Frequency Isolated Current-fed Bidirectional DC/AC Converter For Grid-Tied Energy Storage System  

E-Print Network [OSTI]

tied energy storage systems (ESS) will be voltage to a high-DC/AC converter to interface ESS based on low voltage cellscharging and discharging of the ESS and the control strategy

King Jet, TSENG

2013-01-01T23:59:59.000Z

368

Hardware model of a shipboard zonal electrical distribution system (ZEDS) : alternating current/direct current (AC/DC)  

E-Print Network [OSTI]

A hardware model of a shipboard electrical distribution system based on aspects of the DDG 51 Flight IIA, Arleigh Burke class, 60Hz Alternating Current (AC) and the future direct current (DC), zonal electrical distribution ...

Tidd, Chad N. (Chad Norman)

2010-01-01T23:59:59.000Z

369

A Generalized Class of Stationary Frame-Current Controllers for Grid-Connected AC–DC Converters  

E-Print Network [OSTI]

Within power systems, high-power pulsewidth-modulated ac-dc converters are used in flexible ac transmission systems controllers and for interfacing renewable energy sources to the grid. These converters traditionally ...

Hwang, J. George

370

Design and performance evaluation of an electric go-kart and custom permanent magnet brushless DC motor  

E-Print Network [OSTI]

This undergraduate thesis documents the design considerations and specifications of building a personal battery-powered go-kart. This includes designing and building a custom brushless DC motor for use in the drivetrain. ...

Davis, Eli Marc

2012-01-01T23:59:59.000Z

371

The design of a hybrid DC motor/SMA actuated robotic hand based on physiological and anatomical synergies  

E-Print Network [OSTI]

A new approach to the design and control of multi-fingered hands using hybrid DC motor-Shape Memory Alloy (SMA) array actuators is presented in this thesis. The fundamental design concept is based on the principle of motor ...

Rosmarin, Josiah Benjamin

2008-01-01T23:59:59.000Z

372

232 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 2, MARCH 2002 Current Control Strategy for Brushless DC Motors  

E-Print Network [OSTI]

synchronous motor (PMSM), which is fed with sinusoidal currents 2) brushless dc motor (BDCM), which is fed, the power-to-weight ratio of PMSM and BDCM is higher than equivalent squirrel cage induction machines

Catholic University of Chile (Universidad Católica de Chile)

373

Applied Science/Techniques  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

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374

Effect of electron-phonon interaction on resistivity of some heavy fermion (HF) systems  

SciTech Connect (OSTI)

Here, we have analyzed the electron-phonon interaction in the Periodic Anderson Model (PAM) to describe the temperature dependence of resistivity in some heavy fermion (HF) systems for finite wave vector (q) and for finite temperature (T). Since the resistivity is related to the imaginary part of the electron self energy, the expression for the same is evaluated through double time temperature dependant Green function technique of the Zubarev type. The effect of different system parameters namely the position of 4f level, E{sub 0} and the electron - phonon coupling strengths on resistivity have been studied. The results obtained give satisfactory explanations to the experimental observations.

Sahoo, J., E-mail: jitendrasahoo2008@gmail.com [Assistant Director, Regional Office of Vocational Education, Sambalpur, Odisha-768004 (India); Shadangi, N. [Dept. of Physics, Silicon Institute of Technology, Sambalpur, Odisha-768200 (India); Nayak, P. [School of Physics, Sambalpur University, Sambalpur, Odisha-768019 (India)

2014-04-24T23:59:59.000Z

375

Application of magnetomechanical hysteresis modeling to magnetic techniques for monitoring neutron embrittlement and biaxial stress  

SciTech Connect (OSTI)

The objective is to investigate experimentally and theoretically the effects of neutron embrittlement and biaxial stress on magnetic properties in steels, using various magnetic measurement techniques. Interaction between experiment and modeling should suggest efficient magnetic measurement procedures for determining neutron embrittlement biaxial stress. This should ultimately assist in safety monitoring of nuclear power plants and of gas and oil pipelines. In the first six months of this first year study, magnetic measurements were made on steel surveillance specimens from the Indian Point 2 and D.C. Cook 2 reactors. The specimens previously had been characterized by Charpy tests after specified neutron fluences. Measurements now included: (1) hysteresis loop measurement of coercive force, permeability and remanence, (2) Barkhausen noise amplitude; and (3) higher order nonlinear harmonic analysis of a 1 Hz magnetic excitation. Very good correlation of magnetic parameters with fluence and embrittlement was found for specimens from the Indian Point 2 reactor. The D.C. Cook 2 specimens, however showed poor correlation. Possible contributing factors to this are: (1) metallurgical differences between D.C. Cook 2 and Indian Point 2 specimens; (2) statistical variations in embrittlement parameters for individual samples away from the stated men values; and (3) conversion of the D.C. Cook 2 reactor to a low leakage core configuration in the middle of the period of surveillance. Modeling using a magnetomechanical hysteresis model has begun. The modeling will first focus on why Barkhausen noise and nonlinear harmonic amplitudes appear to be better indicators of embrittlement than the hysteresis loop parameters.

Sablik, M.J.; Kwun, H.; Rollwitz, W.L.; Cadena, D.

1992-01-01T23:59:59.000Z

376

Data:20897232-72c1-4dc1-a001-d1b55c0dc4f8 | Open Energy Information  

Open Energy Info (EERE)

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377

Corrosion resistant metallic bipolar plate  

DOE Patents [OSTI]

A corrosion resistant, electrically conductive component such as a bipolar plate for a PEM fuel cell includes 20 55% Cr, balance base metal such as Ni, Fe, or Co, the component having thereon a substantially external, continuous layer of chromium nitride.

Brady, Michael P. (Oak Ridge, TN); Schneibel, Joachim H. (Knoxville, TN); Pint, Bruce A. (Knoxville, TN); Maziasz, Philip J. (Oak Ridge, TN)

2007-05-01T23:59:59.000Z

378

Method of making sulfur-resistant composite metal membranes  

DOE Patents [OSTI]

The invention provides thin, hydrogen-permeable, sulfur-resistant membranes formed from palladium or palladium-alloy coatings on porous, ceramic or metal supports. Also disclosed are methods of making these membranes via sequential electroless plating techniques, wherein the method of making the membrane includes decomposing any organic ligands present on the substrate, reducing the palladium crystallites on the substrate to reduced palladium crystallites, depositing a film of palladium metal on the substrate and then depositing a second, gold film on the palladium film. These two metal films are then annealed at a temperature between about 200.degree. C. and about 1200.degree. C. to form a sulfur-resistant, composite PdAu alloy membrane.

Way, J. Douglas (Boulder, CO) [Boulder, CO; Lusk, Mark (Golden, CO) [Golden, CO; Thoen, Paul (Littleton, CO) [Littleton, CO

2012-01-24T23:59:59.000Z

379

Study of optical properties of asymmetric bipolar pulse DC magnetron sputtered Ta{sub 2}O{sub 5} thin film as a function of oxygen content in deposition ambient  

SciTech Connect (OSTI)

Tantalum penta-oxide thin films have been deposited by reactive sputtering technique using asymmetric bipolar pulsed DC source at various oxygen percentage viz. 0 to 50 %. The optical properties of the films have been studied by spectroscopic ellipsometry measurements. It has been observed that compact films with low void fraction, high refractive index and band gap can be obtained by the above technique with oxygen percentage in the range of 30–40%. The films deposited with zero or very low oxygen content have high deposition rate and yield metal rich films with large voids, defects, low band gap and high refractive index. Similarly films deposited with >40% oxygen content again contain voids and defects due to the presence of large amount of gas molecules in the sputtering ambient.

Haque, S. Maidul, E-mail: skmaidulhaque@gmail.com; Shinde, D. D., E-mail: skmaidulhaque@gmail.com; Misal, J. S., E-mail: skmaidulhaque@gmail.com [Photonics and Nano-technology Section, Atomic and Molecular Physics Division, BARC, Visakhapatnam-530012 (India); Bhattacharyya, D.; Sahoo, N. K. [Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai - 400085 (India)

2014-04-24T23:59:59.000Z

380

WASHINGTON. DC.  

Office of Legacy Management (LM)

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Note: This page contains sample records for the topic "technique dc resistivity" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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381

Washington, DC'  

Office of Legacy Management (LM)

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382

Multifunctional Corrosion-resistant Foamed Well Cement Composites...  

Broader source: Energy.gov (indexed) [DOE]

Multifunctional Corrosion-resistant Foamed Well Cement Composites Multifunctional Corrosion-resistant Foamed Well Cement Composites Multifunctional Corrosion-resistant Foamed Well...

383

Advanced Techniques for Power System Identification from Measured Data  

SciTech Connect (OSTI)

Time-synchronized measurements provide rich information for estimating a power-system's electromechanical modal properties via advanced signal processing. This information is becoming critical for the improved operational reliability of interconnected grids. A given mode's properties are described by its frequency, damping, and shape. Modal frequencies and damping are useful indicators of power-system stress, usually declining with increased load or reduced grid capacity. Mode shape provides critical information for operational control actions. This project investigated many advanced techniques for power system identification from measured data focusing on mode frequency and damping ratio estimation. Investigators from the three universities coordinated their effort with Pacific Northwest National Laboratory (PNNL). Significant progress was made on developing appropriate techniques for system identification with confidence intervals and testing those techniques on field measured data and through simulation. Experimental data from the western area power system was provided by PNNL and Bonneville Power Administration (BPA) for both ambient conditions and for signal injection tests. Three large-scale tests were conducted for the western area in 2005 and 2006. Measured field PMU (Phasor Measurement Unit) data was provided to the three universities. A 19-machine simulation model was enhanced for testing the system identification algorithms. Extensive simulations were run with this model to test the performance of the algorithms. University of Wyoming researchers participated in four primary activities: (1) Block and adaptive processing techniques for mode estimation from ambient signals and probing signals, (2) confidence interval estimation, (3) probing signal design and injection method analysis, and (4) performance assessment and validation from simulated and field measured data. Subspace based methods have been use to improve previous results from block processing techniques. Bootstrap techniques have been developed to estimate confidence intervals for the electromechanical modes from field measured data. Results were obtained using injected signal data provided by BPA. A new probing signal was designed that puts more strength into the signal for a given maximum peak to peak swing. Further simulations were conducted on a model based on measured data and with the modifications of the 19-machine simulation model. Montana Tech researchers participated in two primary activities: (1) continued development of the 19-machine simulation test system to include a DC line; and (2) extensive simulation analysis of the various system identification algorithms and bootstrap techniques using the 19 machine model. Researchers at the University of Alaska-Fairbanks focused on the development and testing of adaptive filter algorithms for mode estimation using data generated from simulation models and on data provided in collaboration with BPA and PNNL. There efforts consist of pre-processing field data, testing and refining adaptive filter techniques (specifically the Least Mean Squares (LMS), the Adaptive Step-size LMS (ASLMS), and Error Tracking (ET) algorithms). They also improved convergence of the adaptive algorithms by using an initial estimate from block processing AR method to initialize the weight vector for LMS. Extensive testing was performed on simulated data from the 19 machine model. This project was also extensively involved in the WECC (Western Electricity Coordinating Council) system wide tests carried out in 2005 and 2006. These tests involved injecting known probing signals into the western power grid. One of the primary goals of these tests was the reliable estimation of electromechanical mode properties from measured PMU data. Applied to the system were three types of probing inputs: (1) activation of the Chief Joseph Dynamic Brake, (2) mid-level probing at the Pacific DC Intertie (PDCI), and (3) low-level probing on the PDCI. The Chief Joseph Dynamic Brake is a 1400 MW disturbance to the system and is injected for a ha

Pierre, John W.; Wies, Richard; Trudnowski, Daniel

2008-11-25T23:59:59.000Z

384

High-gain dc SQUID magnetometers with NbN nanobridges  

SciTech Connect (OSTI)

This paper reports on high-gain dc SQUIDs using NbN nanobridges fabricated for magnetometers with high sensitivity, and their device parameters and intrinsic energy sensitivity have been evaluated. The slit inductance of the square washer SQUID was reduced by using the co-planar edge structure of the low inductance. The junction capacitance was typically 15 {approximately} 40 ft. The maximum voltage modualtion was about 110 {mu}V for the NbN nanobridge SQUID with an inductance of 0.18nH.

Irie, A.; Hamasaki, K.; Yamashita, T. (Dept. of Electronics, Nagaoka Univ. of Technology, Kamitomioka-Machi 1603-1, Nagoka-shi, Niigata 940-21 (JP)); Matsui, T.; Komiyama, B. (Communication Research Lab., Ministry of Posts and Telecommunication, Koganei, Tokyo 184 (JP))

1991-03-01T23:59:59.000Z

385

Use of Facility Contractor Employees for Services to DOE in the Washington, D.C., Area  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To clarify and modify policies and procedures for management of Department of Energy (DOE) facility contractor employees located in the Washington, D.C., area. A facility contractor employee is any employee of either a contractor responsible for managing a Department-owned facility, such as a National Laboratory, or a subcontractor of such a contractor. Facility contractor means any contractor performing under a Management and Operating (M&O), Management and Integration (M&I), or Environmental Restoration Management Contractor (ERMC) contract awarded by a DOE contracting officer. Canceled by DOE O 350.2.

1999-04-15T23:59:59.000Z

386

Long range temporal correlation in the chaotic oscillations of a dc glow discharge plasma  

SciTech Connect (OSTI)

Long range temporal correlations in the fluctuations of the plasma floating potentials (measured using a Langmuir probe) are investigated in a dc glow discharge plasma. Keeping the neutral pressure constant, the discharge voltage was varied and at the formation of the plasma, quasi periodic oscillations were excited and on further increase of the discharge voltage they became chaotic (irregular) beyond a threshold voltage. We compared the Lyapunov exponent with the Hurst exponent obtained from R/S statistics which showed an opposite behaviour at the transition point. These results are perhaps new since we have not come across such comparative analysis for chaotic oscillations in a glow discharge plasma before.

Lahiri, S. [Dinabandhu Mahavidyalaya, Bongaon, North 24 Parganas, Kolkata 743235 (India); Roychowdhury, D. [Techno India, EM4/1 Sector V, Salt Lake, Kolkata 700091 (India); Sekar Iyengar, A. N. [Plasma Physics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India)

2012-08-15T23:59:59.000Z

387

DC CICC retrofit magnet preliminary design, protection analysis, and software development. Final report  

SciTech Connect (OSTI)

The MIT Plasma Fusion Center magnet technology development effort, in support of the DOE/PETC MHD program, has culminated in two recent innovations which, when combined, will not only improve the reliability of commercial scale MHD magnets but will also reduce their cost by a factor of two. The first of these is a new form of Cable In Conduit Conductor (CICC) designed specifically for large scale DC superconducting magnets and the second is a highly efficient, quasi-momentless force containment which is made possible by the new conductor.

Marston, P.G.

1994-04-28T23:59:59.000Z

388

Demonstration of LED Retrofit Lamps at the Smithsonian American Art Museum, Washington, DC  

SciTech Connect (OSTI)

This report documents observations and results obtained from a lighting demonstration project conducted under the U.S. Department of Energy GATEWAY Solid-State Lighting (SSL) Technology Demonstration Program at the Smithsonain American Art Museum in Washington, DC. LED Lamp samples were tested in the museum workshop, temporarily installed in a gallery for feedback, and ultimately replaced all traditional incandescent lamps in one gallery of modernist art at the American Art Museum and partially replacing lamps in two galleries at the Musesum's Renwick Gallery. This report describes the selection and testing process, technology challenges, perceptions, economics, energy use, and mixed results of usign LED replacement lamps in art galleries housing national treasures.

Miller, Naomi J.; Rosenfeld, Scott M.

2012-06-22T23:59:59.000Z

389

DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers  

DOE Patents [OSTI]

A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced. 7 figures.

Fan, N.Q.; Clarke, J.

1993-10-19T23:59:59.000Z

390

DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers  

DOE Patents [OSTI]

A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced.

Fan, Non Q. (San Diego, CA); Clarke, John (Berkeley, CA)

1993-01-01T23:59:59.000Z

391

Washington DC Regions | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

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392

BERAC Meeting April 20-21, 2005 Washington DC | U.S. DOE Office of Science  

Office of Science (SC) Website

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE:1 First Use of Energy for All Purposes (Fuel and Nonfuel),Feet) Year Jan Feb Mar Apr MayAtmosphericNuclear SecurityTensile Strain Switched5 IndustrialIsadore Perlman,BiosScience(SC) April 20-21, 2005 Washington DC

393

VA-MD-DC Hydrogen Education for Decision Makers | Department of Energy  

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

AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious RankCombustion |Energy Usage »of EnergyTheTwoVulnerabilities | Department of Energy 5:VA4-BVA-MD-DC

394

Devil's staircase, spontaneous-DC bias, and chaos via quasiperiodic plasma oscillations in semiconductor superlattices  

E-Print Network [OSTI]

We study a plasma instability in semiconductor superlattices irradiated by a monochromatic, pure AC electric field. The instability leads to sustained oscillations at a frequency \\omega 2 that is either incommensurate to the drive, or frequency-locked to it, \\omega 2 = (p/q) \\omega. A spontaneously generated DC bias is found when either p or q in the locking ratio are even integers. Frequency locked regions form Arnol'd tongues in parameter space and the ratio \\omega 2 / \\omega\\ exhibits a Devil's staircase. A transition to chaotic motion is observed as resonances overlap.

Jukka Isohätälä; Kirill N. Alekseev

2012-01-30T23:59:59.000Z

395

CORROSION RESISTANCE OF FISH TAGGING PINS  

E-Print Network [OSTI]

CORROSION RESISTANCE OF FISH TAGGING PINS [Marine Biological Laboratoryj WOODS HOLE, MASS. SPECIAL A, Seaton, Secretary Fish and Wildlife Service, Arnie J. Suoraela, Commissioner CORROSION RESISTANCE were tagged with nickel and Type 304 stainless steel pins to compare the corrosion resistance

396

CORROSION-RESISTANT COATING FOR CARBONATE  

E-Print Network [OSTI]

CORROSION-RESISTANT COATING FOR CARBONATE FUEL CELL COMPONENTS Prepared For: California Energy ANALYSIS REPORT (FAR) CORROSION RESISTANT COATING FOR CARBONATE FUEL CELL COMPONENTS EISG AWARDEE Chemat://www.energy.ca.gov/research/index.html. #12;Page 1 Corrosion Resistant Coating for Carbonate Fuel Cell Components EISG Grant # 00-05 Awardee

397

CORROSION RESISTANCE OF DENTAL ALLOYS  

E-Print Network [OSTI]

Metals and metallic alloys are unavoidable materials in everyday dental use for the making of fillings, cast cores and post systems, individual crowns, implantants ’ suprastructures, dentures and orthodontic devices. They still belong to the vital materials in dentistry. Applied alloys in a mouth are exposed to the influence of chemical, biological, mechanical, thermal and electrical forces which can have a negative impact on a very therapeutic work or surrounding tissue. Electrochemical corrosion is the most important damaging factor of dental works. The corrosive resistance of metal is its important characteristic during implantation into a mouth. Therefore precious alloys are the most suitable for dental use. However, due to economic reasons, nonprecious alloys are frequently used, while corrosive resistant precious metals have been used less frequently. Based on studying different literature, the purpose of this work was to give and overview of the existing dental metals and alloys in contexts with their anticorrosive characteristics.

Belma Muhamedagi?; Bosna I Hercegovina; Lejla Muhamedagi?; Bosna I Hercegovina

398

Student resistance to journal writing  

E-Print Network [OSTI]

58 60 61 LIST OF TABLES Table 1: Taxonomy. Table 2: Responses to Question Two Table 3: Coding Scheme for Question Three. Table 4: Responses to Question Three Table 5: Responses to Question Four. Table 6: Responses to Question Five. Table 7... of eight content questions about students' attitudes toward and resistance to journal writing. The responses rendered specific details in the following five areas: 1. How many students keep journals without being required, and how students feel about...

Ingram, Gynger Lynne

1991-01-01T23:59:59.000Z

399

Hydrostatic pressure (8 GPa) dependence of electrical resistivity of BaCo{sub 2}As{sub 2} single crystal  

SciTech Connect (OSTI)

Graphical abstract: - Highlights: • Single crystals of BaCo{sub 2}As{sub 2} were grown by CoAs self-flux method. • We have studied pressure effects (8 GPa) on dc electrical resistivity of BaCo{sub 2}As{sub 2}. • On applied external pressure BaCo{sub 2}As{sub 2} remains a metallic state up to 8 GPa. • Superconductivity is absent in BaCo{sub 2}As{sub 2} because of its proximity to ferromagnetism. - Abstract: The pressure dependence of the electrical resistivity of BaCo{sub 2}As{sub 2} single crystal as a function of temperature was measured at ambient and high pressures up to 8 GPa for the first time using cubic anvil high pressure cell. It is observed that at room temperature the resistivity monotonically decreases with increasing pressure and it remains in the metallic state even at an applied pressure of 8 GPa. From the temperature dependence of the resistivity measurements under pressure, we found that superconductivity is absent up to 8 GPa. The value of the electron's scattering factor (A) is found to be large at ambient pressure and it decreases with the application of pressure, indicating that the substantial electron correlation effect of BaCo{sub 2}As{sub 2} is reduced under pressure, revealing a dramatic change of density of states at the Fermi energy.

Ganguli, Chandreyee; Matsubayashi, Kazuyuki; Ohgushi, Kenya [Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan); Uwatoko, Yoshiya, E-mail: uwatoko@issp.u-tokyo.ac.jp [Institute for Solid State Physics, The University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan); Kanagaraj, Moorthi [Centre for High Pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli 620024 (India); Arumugam, Sonachalam, E-mail: sarumugam1963@yahoo.com [Centre for High Pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli 620024 (India)

2013-10-15T23:59:59.000Z

400

18th Annual International Conference of the IEEE Engineering in MIedicineand BiollogySociety, Amsterdam 1996 3.3.1: MR Imaging Systems and Reconstruction Techniques  

E-Print Network [OSTI]

Society, Amsterdam 1996 3.3.1: MR Imaging Systems and Reconstruction Techniques MEASURINGAC MAGNETIC FIELD is given in Fig.1. In the absence of an applied AC current, this pulse sequence is the same asthe one used by Maudsley A.A. et.al. to calculate the DC magnetic field inhomo se RP .,A_ II I f 0Gz I " v - who & - Fig.1

Ider, Yusuf Ziya

Note: This page contains sample records for the topic "technique dc resistivity" 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

Drive laser system for the DC-SRF photoinjector at Peking University  

E-Print Network [OSTI]

Photoinjectors are widely used for linear accelerators as electron sources to generate high-brightness electron beam. Drive laser, which determines the timing structure and quality of the electron beam, is a crucial device of photoinjector. A new drive laser system has been designed and constructed for the upgraded 3.5-cell DC-SRF photoinjector at Peking University. The drive laser system consists of a 1064 nm laser oscillator, a four- stage amplifier, the second and fourth harmonic generators, the optical system to transfer the UV pulses to the photocathode, and the synchronization system. The drive laser system has been successfully applied in the stable operation of DC-SRF photoinjector and its performance meets the requirements. 266 nm laser with an average power close to 1W can be delivered to illuminate the Cs2Te photocathode and the instability is less than 5% for long time operation. The design consideration for improving the UV laser quality, a detailed description of laser system, and its performanc...

Wang, Zhiwen; Lin, Lin; Zhao, Gang; Quan, Shengwen; Liu, Kexin; Chen, Jiaer

2015-01-01T23:59:59.000Z

402

Frequency multiplexed flux locked loop architecture providing an array of DC SQUIDS having both shared and unshared components  

DOE Patents [OSTI]

Architecture for frequency multiplexing multiple flux locked loops in a system comprising an array of DC SQUID sensors. The architecture involves dividing the traditional flux locked loop into multiple unshared components and a single shared component which, in operation, form a complete flux locked loop relative to each DC SQUID sensor. Each unshared flux locked loop component operates on a different flux modulation frequency. The architecture of the present invention allows a reduction from 2N to N+1 in the number of connections between the cryogenic DC SQUID sensors and their associated room temperature flux locked loops. Furthermore, the 1.times.N architecture of the present invention can be paralleled to form an M.times.N array architecture without increasing the required number of flux modulation frequencies.

Ganther, Jr., Kenneth R. (Olathe, KS); Snapp, Lowell D. (Independence, MO)

2002-01-01T23:59:59.000Z

403

Quantum resistance standard accuracy close to the zero-dissipation state  

SciTech Connect (OSTI)

We report on a comparison of four GaAs/AlGaAs-based quantum resistance standards using an original technique adapted from the well-known Wheatstone bridge. This work shows that the quantized Hall resistance at Landau level filling factor ?=2 can be reproducible with a relative uncertainty of 32×10{sup ?12} in the dissipationless limit of the quantum Hall effect regime. In the presence of a very small dissipation characterized by a mean macroscopic longitudinal resistivity R{sub xx}(B) of a few ??, the discrepancy ?R{sub H}(B) between quantum Hall resistors measured on the Hall plateau at magnetic induction B turns out to follow the so-called resistivity rule R{sub xx}(B)=?B×d(?R{sub H}(B))/dB. While the dissipation increases with the measurement current value, the coefficient ? stays constant in the range investigated (40?120 ?A). This result enlightens the impact of the dissipation emergence in the two-dimensional electron gas on the Hall resistance quantization, which is of major interest for the resistance metrology. The quantum Hall effect is used to realize a universal resistance standard only linked to the electron charge e and the Planck constant h and it is known to play a central role in the upcoming revised Système International of units. There are therefore fundamental and practical benefits in testing the reproducibility property of the quantum Hall effect with better and better accuracy.

Schopfer, F.; Poirier, W. [Laboratoire National de métrologie et d'Essais (LNE), 29 avenue Roger Hennequin, 78197 Trappes (France)] [Laboratoire National de métrologie et d'Essais (LNE), 29 avenue Roger Hennequin, 78197 Trappes (France)

2013-08-14T23:59:59.000Z

404

Low Temperature Material Bonding Technique  

DOE Patents [OSTI]

A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

2000-10-10T23:59:59.000Z

405

Low temperature material bonding technique  

DOE Patents [OSTI]

A method of performing a lower temperature bonding technique to bond together two mating pieces of glass includes applying a sodium silicate aqueous solution between the two pieces.

Ramsey, J. Michael (Knoxville, TN); Foote, Robert S. (Oak Ridge, TN)

2002-02-12T23:59:59.000Z

406

Thermal Shock-resistant Cement  

SciTech Connect (OSTI)

We studied the effectiveness of sodium silicate-activated Class F fly ash in improving the thermal shock resistance and in extending the onset of hydration of Secar #80 refractory cement. When the dry mix cement, consisting of Secar #80, Class F fly ash, and sodium silicate, came in contact with water, NaOH derived from the dissolution of sodium silicate preferentially reacted with Class F fly ash, rather than the #80, to dissociate silicate anions from Class F fly ash. Then, these dissociated silicate ions delayed significantly the hydration of #80 possessing a rapid setting behavior. We undertook a multiple heating -water cooling quenching-cycle test to evaluate the cement’s resistance to thermal shock. In one cycle, we heated the 200 and #61616;C-autoclaved cement at 500 and #61616;C for 24 hours, and then the heated cement was rapidly immersed in water at 25 and #61616;C. This cycle was repeated five times. The phase composition of the autoclaved #80/Class F fly ash blend cements comprised four crystalline hydration products, boehmite, katoite, hydrogrossular, and hydroxysodalite, responsible for strengthening cement. After a test of 5-cycle heat-water quenching, we observed three crystalline phase-transformations in this autoclaved cement: boehmite and #61614; and #61543;-Al2O3, katoite and #61614; calcite, and hydroxysodalite and #61614; carbonated sodalite. Among those, the hydroxysodalite and #61614; carbonated sodalite transformation not only played a pivotal role in densifying the cementitious structure and in sustaining the original compressive strength developed after autoclaving, but also offered an improved resistance of the #80 cement to thermal shock. In contrast, autoclaved Class G well cement with and without Class F fly ash and quartz flour failed this cycle test, generating multiple cracks in the cement. The major reason for such impairment was the hydration of lime derived from the dehydroxylation of portlandite formed in the autoclaved cement, causing its volume to expand.

Sugama T.; Pyatina, T.; Gill, S.

2012-02-01T23:59:59.000Z

407

Temperature Resistant Optimal Ratchet Transport  

E-Print Network [OSTI]

Stable periodic structures containing optimal ratchet transport, recently found in the parameter space dissipation versus ratchet parameter [PRL 106, 234101 (2011)], are shown to be resistant to reasonable temperatures, reinforcing the expectation that they are essential to explain the optimal ratchet transport in nature. Critical temperatures for their destruction, valid from the overdamping to close to the conservative limits, are obtained numerically and shown to be connected to the current efficiency, given here analytically. Results are demonstrated for a discrete ratchet model and generalized to the Langevin equation with an additional external oscillating force.

Cesar Manchein; Alan Celestino; Marcus W Beims

2012-11-12T23:59:59.000Z

408

Attrition resistant fluidizable reforming catalyst  

DOE Patents [OSTI]

A method of preparing a steam reforming catalyst characterized by improved resistance to attrition loss when used for cracking, reforming, water gas shift and gasification reactions on feedstock in a fluidized bed reactor, comprising: fabricating the ceramic support particle, coating a ceramic support by adding an aqueous solution of a precursor salt of a metal selected from the group consisting of Ni, Pt, Pd, Ru, Rh, Cr, Co, Mn, Mg, K, La and Fe and mixtures thereof to the ceramic support and calcining the coated ceramic in air to convert the metal salts to metal oxides.

Parent, Yves O. (Golden, CO); Magrini, Kim (Golden, CO); Landin, Steven M. (Conifer, CO); Ritland, Marcus A. (Palm Beach Shores, FL)

2011-03-29T23:59:59.000Z

409

Enhanced radiation resistant fiber optics  

DOE Patents [OSTI]

A process for producing an optical fiber having enhanced radiation resistance is provided, the process including maintaining an optical fiber within a hydrogen-containing atmosphere for sufficient time to yield a hydrogen-permeated optical fiber having an elevated internal hydrogen concentration, and irradiating the hydrogen-permeated optical fiber at a time while the optical fiber has an elevated internal hydrogen concentration with a source of ionizing radiation. The radiation source is typically a cobalt-60 source and the fiber is pre-irradiated with a dose level up to about 1000 kilorads of radiation. 4 figures.

Lyons, P.B.; Looney, L.D.

1993-11-30T23:59:59.000Z

410

Abrasion resistant track shoe grouser  

DOE Patents [OSTI]

A track shoe for a track-type vehicle. The track shoe includes a base plate and a grouser projecting away from the base plate. A capping surface structure of substantially horseshoe shaped cross-section is disposed across a distal portion of the grouser. The capping surface structure covers portions of a distal edge surface and adjacent lateral surfaces. The capping surface structure is formed from an material characterized by enhanced wear resistance relative to portions of the grouser underlying the capping surface structure.

Fischer, Keith D; Diekevers, Mark S; Afdahl, Curt D; Steiner, Kevin L; Barnes, Christopher A

2013-04-23T23:59:59.000Z

411

A corrosive resistant heat exchanger  

DOE Patents [OSTI]

A corrosive and erosive resistant heat exchanger which recovers heat from a contaminated heat stream. The heat exchanger utilizes a boundary layer of innocuous gas, which is continuously replenished, to protect the heat exchanger surface from the hot contaminated gas. The innocuous gas is pumped through ducts or perforations in the heat exchanger wall. Heat from the heat stream is transferred by radiation to the heat exchanger wall. Heat is removed from the outer heat exchanger wall by a heat recovery medium. 3 figs., 3 tabs.

Richlen, S.L.

1987-08-10T23:59:59.000Z

412

FORENSIC TECHNIQUES FOR CELL PHONES  

E-Print Network [OSTI]

June 2007 FORENSIC TECHNIQUES FOR CELL PHONES FORENSIC TECHNIQUES FOR CELL PHONES Shirley Radack cell phones are widely used for both personal and professional applications, the technology of cell forensics usually do not cover cell phones, especially those with advanced capabilities. The digital

413

Layered ultra-thin coherent structures used as electrical resistors having low-temperature coefficient of resistivity  

DOE Patents [OSTI]

A thin film resistor having a controlled temperature coefficient of resistance (TCR) ranging from negative to positive degrees kelvin and having relatively high resistivity. The resistor is a multilayer superlattice crystal containing a plurality of alternating, ultra-thin layers of two different metals. TCR is varied by controlling the thickness of the individual layers. The resistor can be readily prepared by methods compatible with thin film circuitry manufacturing techniques.

Werner, T.R.; Falco, C.M.; Schuller, I.K.

1982-08-31T23:59:59.000Z

414

Abstract--In this paper, the authors present the modelling of the impedance variation of an inverter DC bus. Modelling is  

E-Print Network [OSTI]

an analysis of the inverter DC bus in order to develop a new diagnostic method by the elec- tromagnetic field of an inverter DC bus. Modelling is done by application of the PEEC method (Partial Element Equivalent Circuit measurement [1]. Actually, the power of the electrical drives flows through the bus-bar, for this rea- son

Boyer, Edmond

415

Development of a technique to screen for resistance to Cercospora sorghi in sorghum  

E-Print Network [OSTI]

leaf by leaf, after inoculation. ICT Nurser -Naturall Occurrin Inoculum The International Cercospora Test (ICT) was compiled by selecting accessions from various nurseries evaluated at agricultural experiment stations at Beeville and Berclair... test, or their ranking, was more meaningful than their particular scores in the different tests (Tables 10-16; see pages 39-45). ICT Nurser -Naturall Occurrin Inoculum The ICT nursery planted at Beeville, TX, during 1982 was exposed only...

Wall, George Clayton

1983-01-01T23:59:59.000Z

416

A simple, reliable technique for making electrical contact to multiwalled carbon nanotubes  

E-Print Network [OSTI]

A simple, reliable technique for making electrical contact to multiwalled carbon nanotubes P. J. de nanotubes is described. With these contacts, current in the mA range can be routinely passed through individual multiwalled nanotubes without adverse consequences, thus allowing their resistance to be measured

417

Development of wear resistant ceramic coatings for diesel engine components  

SciTech Connect (OSTI)

Improved fuel economy and a reduction of emissions can be achieved by insulation of the combustion chamber components to reduce heat rejection. However, insulating the combustion chamber components will also increase the operating temperature of the piston ring/cylinder liner interface from approximately 150{degree}C to over 300{degree}C. Existing ring/liner materials can not withstand these higher operating temperatures and for this reason, new materials need to be developed for this critical tribological interface. The overall goal of this program is the development of piston ring/cylinder liner material pairs which would be able to provide the required friction and wear properties at these more severe operating conditions. More specifically, this program first selected, and then evaluated, potential d/wear resistant coatings which could be applied to either piston rings an or cylinder liners and provide, at 350{degree}C under lubricated conditions, coefficients of friction below 0.1 and wear rates of less than 25 {times} lO{sup {minus}6} mm/hour. The processes selected for applying the candidate wear resistant coatings to piston rings and/or cylinder liners were plasma spraying, chemical vapor, physical vapor and low temperature arc vapor deposition techniques as well as enameling techniques.

Haselkorn, M.H. (Caterpillar, Inc., Peoria, IL (United States))

1992-04-01T23:59:59.000Z

418

Review : integration of EMI technique with global vibration technique  

E-Print Network [OSTI]

In the last decade, the development of Structural Health Monitoring (SHM) has been skyrocketing because of the serious consequences that come with structural failure. Traditional damage detection techniques, also known as ...

Ni, Suteng

2013-01-01T23:59:59.000Z

419

Clothes That Care -- Flame Resistant Protection.  

E-Print Network [OSTI]

.. 8-1272 othes That Care- Flame Resistant Protection" TOoe ZTA245.7 8873 NQ.'2'T2 Texas Agricultural Extension Service . The Texas A&M University System Daniel C. Pfannstiel, Director, College Station, Texas , ? Clothes That Care- Flame... Resistant Protection Claudia Kerbel * Concern for a safer environment has led to changes in many of the everyday products we use , including clothing . In the' past dec ade, flame-resistant (FR) garments and fabrics have become more available than ever...

Kerbel, Claudia

1980-01-01T23:59:59.000Z

420

Electrical resistivity investigations over limestone caverns  

E-Print Network [OSTI]

necessary to supplement the geo- electrical measurements with geologicsl structural information in orqer to carry out useful analyses, but the resistivi ty data did con- tr&bute significantly to the fine I interpretation. A new approach. to resistivity..., ) radial distance from electrode or image (m) radius of cavity (m) mutual resistance given by V/I (ohms) electric resistance between opposite faces of test specimen (ohms) current source and sink terms (volt. m/2'n ) electric potential (volts...

Porter, Charles Osgood

1966-01-01T23:59:59.000Z

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


421

Meeting Summary Advanced Light Water Reactor Fuels Industry Meeting Washington DC October 27 - 28, 2011  

SciTech Connect (OSTI)

The Advanced LWR Fuel Working Group first met in November of 2010 with the objective of looking 20 years ahead to the role that advanced fuels could play in improving light water reactor technology, such as waste reduction and economics. When the group met again in March 2011, the Fukushima incident was still unfolding. After the March meeting, the focus of the program changed to determining what we could do in the near term to improve fuel accident tolerance. Any discussion of fuels with enhanced accident tolerance will likely need to consider an advanced light water reactor with enhanced accident tolerance, along with the fuel. The Advanced LWR Fuel Working Group met in Washington D.C. on October 72-18, 2011 to continue discussions on this important topic.

Not Listed

2011-11-01T23:59:59.000Z

422

Experimental results from a DC photocathode electron gun for an IR FEL  

SciTech Connect (OSTI)

A 350 keV DC photocathode gun capable of delivering the high-brightness CW electron beam necessary for Jefferson Lab`s infrared free-electron laser is described. The gun is to be used with a superconducting radiofrequency linac operating at 1.497 GHz and is mode-locked to the 40th subharmonic of the fundamental using a Nd:YLF drive laser. The gun provides 20--25 ps bunches at up to 135 pC/bunch. Experimental measurements of transverse and longitudinal beam properties are presented. Transverse emittance is measured using a slit-wire scanner emittance meter, and energy spread is measured using the slit and a spectrometer magnet. Longitudinal emittance is measured using a combination of sampling aperture, kicker cavity, slit and spectrometer. Measurements for bunch charges of 135 pC are described and compared with simulations.

Kehne, D.; Engwall, D.; Legg, R.; Shinn, M.

1997-10-01T23:59:59.000Z

423

Schlumberger Resistivity Soundings At Chena Geothermal Area ...  

Open Energy Info (EERE)

Schlumberger Resistivity Soundings Activity Date 1979 - 1980 Usefulness useful DOE-funding Unknown Exploration Basis Geophysical studies through the University of Alaska...

424

ORIGINAL CONTRIBUTION Multidrug Resistance Among Persons  

E-Print Network [OSTI]

ORIGINAL CONTRIBUTION Multidrug Resistance Among Persons With Tuberculosis in California, 1994- tinuestohaveasubstantialpublichealth impact, leading in 2003 to 233 deaths and more than 132 cases diagnosed among children younger

Marathe, Achla

425

November 18, 2008 1 Abstract--In this paper, we analyze the N-1 reliable DC optimal  

E-Print Network [OSTI]

of the transmission element (line or transformer) and the model can be used for planning and/or operations. We or transformer) g: generator d: load c: operating state; c = 0 indicates the no contingency state (steady- stateNovember 18, 2008 1 Abstract--In this paper, we analyze the N-1 reliable DC optimal dispatch

Ferris, Michael C.

426

In Proc of Direct Methanol Fuel Cell Symposium, 199th Electrochem.l Soc. Mtg, Washington DC, 3/01.  

E-Print Network [OSTI]

In Proc of Direct Methanol Fuel Cell Symposium, 199th Electrochem.l Soc. Mtg, Washington DC, 3/01. MATHEMATICAL MODELING OF LIQUID-FEED DIRECT METHANOL FUEL CELLS Z. H. Wang and C. Y. Wang Electrochemical methanol fuel cells (DMFC). Diffusion and convection of both gas and liquid phases are considered

Wang, Chao-Yang

427

Ver.2003.01.27 Development of Low-Voltage and Large-Current DC Power Supply  

E-Print Network [OSTI]

-4000A 1kHz 1kHz 940-2188 1603-1 Nagaoka University of Technology 1603-1 Kamitomioka, Nagaoka : 1 4 13V-5000A Fig. 4. Cross section diagram of high-frequency step down transformer of 13V-5000A DC

Fujimoto, Hiroshi

428

falls into this category if the PV DC conductors penetrate the house. Although batteries are not power generators,  

E-Print Network [OSTI]

falls into this category if the PV DC conductors penetrate the house. Although batteries-grid, battery-based PV systems or grid-tied (utility-interactive) PV systems with battery backup. In situations are not power generators, they can source energy, so a battery disconnect might also fall into this category

Johnson, Eric E.

429

A new approach to modelling the impact of EMI on MOSFET DC behaviour R. Fernndez-Garca, 1  

E-Print Network [OSTI]

the DC MOSFET behaviour under electromagnetic interference (EMI) is presented. The model is able-power law directly applied to a MOSFET under EMI impact. KEYWORDS: MOSFET, Electromagnetic Interference (EMI: Electronic systems are disturbed by electromagnetic interference (EMI) which can potentially disrupt

Paris-Sud XI, Université de

430

Abscisic acid-dependent and -independent expression of the carrot LEA class gene Dc3 in transgenic tobacco seedlings  

E-Print Network [OSTI]

We studied the expression of three promoter deletion mutants (A218, A599, and A1312) of the Late Embryo Abundant (LEA) class gene Dc3 fused to the reporter gene, B-glucuronidase (GUS) in 14 d old transgenic tobacco seedlings. Seedlings were...

Siddiqui, Najeeb Ullah

1997-01-01T23:59:59.000Z

431

For presentation at the Fuel Cell Projects Kickoff Meeting, DOE Headquarters, Washington DC, September 30 October 1, 2009.  

E-Print Network [OSTI]

the commercialization of fuel cell technology. · The validated transport model can be employed to improve and optimize1 For presentation at the Fuel Cell Projects Kickoff Meeting, DOE Headquarters, Washington DC Fuel Cells Fuel Cell Projects Kickoff Meeting September 30 - October 1, 2009 Presented by: Ken S

432

Novel Insights into Lossless AC and DC Power Flow Florian Dorfler, Student Member, IEEE, and Francesco Bullo, Fellow, IEEE  

E-Print Network [OSTI]

1 Novel Insights into Lossless AC and DC Power Flow Florian D¨orfler, Student Member, IEEE work supported by NSF grant CPS- 1135819. Florian D¨orfler and Francesco Bullo are with the Center 93106. Email: {dorfler,bullo}@engineering.ucsb.edu approximation only near an operating point with small

Bullo, Francesco

433

COMPLETELY DC-FREE DIRECT SEQUENCE SPECTRUM SPREADING SCHEME FOR LOW POWER, LOW COST, DIRECT CONVERSION TRANSCEIVER  

E-Print Network [OSTI]

call the offset code spreading scheme. By employing the scheme, we can implement a direct- conversion- level design. The direct conversion receiver architecture combined with D-BPSK (differential, there are some design problems. In a direct conversion receiver, DC offset due to carrier leakage and 1/f mixer

Lee, Thomas H.

434

Wiring design based on Global Energy Requirement criteria: a first step towards optimization of DC distribution voltage  

E-Print Network [OSTI]

optimization methodology based on the primary energy environmental impact 2.1. The Global Energy RequirementWiring design based on Global Energy Requirement criteria: a first step towards optimization of DC. Introduction Nowadays, the global energy context leads to a need for the development of distributed Renewable

Paris-Sud XI, Université de

435

Superconductivity for Electric Systems Annual Peer Review Washington, DC July 27-29, 2004 University of Wisconsin-Madison  

E-Print Network [OSTI]

1 Superconductivity for Electric Systems Annual Peer Review Washington, DC July 27-29, 2004. Gurevich, D. C. Larbalestier Industrial partner: American Superconductor Corporation Funding: ORNL: 225 k$ (DOE) LANL: 200 k$ (DOE) UW: 200 k$ (DOE, AFOSR-MURI) #12;2 Superconductivity for Electric Systems

436

Superconductivity for Electric Systems Annual Peer Review Washington, DC July 23-25, 2003 OAK RIDGE NATIONAL LABORATORY  

E-Print Network [OSTI]

Superconductivity for Electric Systems Annual Peer Review Washington, DC ­ July 23-25, 2003 OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY American Superconductor Corporation M. W. Rupich, D-in ORNL-AMSC CRADA: Development of 2G YBCO-RABiTS Wires #12;Superconductivity for Electric Systems Annual

437

A three-level buck converter to regulate a high-voltage DC-to-AC inverter  

E-Print Network [OSTI]

A three-level buck converter is designed and analyzed, and shown to be suitable as a high-voltage down converter as a pre-regulation stage for a 600 watt DC-to-AC power inverter. Topology selection for the inverter is ...

Schrock, Kenneth C

2008-01-01T23:59:59.000Z

438

650 IEEE TRANSACTIONS ON POWER DELIVERY, VOL. 26, NO. 2, APRIL 2011 Hourly Scheduling of DC Transmission Lines in  

E-Print Network [OSTI]

Transmission Lines in SCUC With Voltage Source Converters Azim Lotfjou, Mohammad Shahidehpour, Fellow, IEEE transmission lines, se- curity-constrained unit commitment, voltage-source converters. NOMENCLATURE Index of ac;LOTFJOU et al.: HOURLY SCHEDULING OF DC TRANSMISSION LINES 651 , Vector of real and reactive power

Fu, Yong

439

Improvement of power supply EMC by chaos J.H.B. Deane and D.C. Hamill  

E-Print Network [OSTI]

Improvement of power supply EMC by chaos J.H.B. Deane and D.C. Hamill Department of Electronic is spread, its peaks are reduced and EMC is improved, compared to the case when the circuit is operating consisting of the switching frequency and many harmonics. Such interference poses significant EMC problems

Deane, Jonathan

440

TRANSVERSE AEOLIAN RIDGES ON MARS: DISTRIBUTION, ORIENTATIONS, AND AGES. D.C. , M.R. Balme1  

E-Print Network [OSTI]

TRANSVERSE AEOLIAN RIDGES ON MARS: DISTRIBUTION, ORIENTATIONS, AND AGES. D.C. Berman1 , M.R. Balme1 , M.C. Bourke1 , S. Rafkin3 , and J.R. Zimbelman2 , 1 Planetary Science Institute, 1700 E. Ft. Lowell' [1]. Figure 1. Percent areal coverage of TARs in MOC images for northern hemisphere. White dots

Bourke, Mary C.

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


441

MAGNETIC COUPLING BETWEEN DC TACHOMETER AND MOTOR AND ITS EFFECT ON MOTION CONTROL IN THE PRESENCE OF  

E-Print Network [OSTI]

orientations of the motor and tachometer permanent magnets......21 Fig. 4.5(b) Motor and Tachometer fieldsMAGNETIC COUPLING BETWEEN DC TACHOMETER AND MOTOR AND ITS EFFECT ON MOTION CONTROL IN THE PRESENCE OF SHAFT COMPLIANCE by Shorya Awtar A Thesis Submitted to the Graduate Faculty of Rensselaer Polytechnic

Awtar, Shorya

442

Essential Oil of Dyssodia acerosa DC. Mario R. Tellez,* Rick E. Estell, Ed L. Fredrickson, and Kris M. Havstad  

E-Print Network [OSTI]

Mexico, and GC/MS and retention indices were used to identify 62 components from the steam-distilled oilEssential Oil of Dyssodia acerosa DC. Mario R. Tellez,* Rick E. Estell, Ed L. Fredrickson, and Kris, P.O. Box 30003, MSC 3JER, New Mexico State University, Las Cruces, New Mexico 88003 Samples

443

National Museum of the American Indian Museum Stores Washington, D.C. & New York Vendor Product Proposal  

E-Print Network [OSTI]

National Museum of the American Indian Museum Stores Washington, D.C. & New York Vendor Product Proposal Submission to Museum Stores National Museum of the American Indian (NMAI) Our Museum Stores your craft for sale in our Museum Stores, vendor shall be responsible for complying with all applicable

Mathis, Wayne N.

444

National Museum of the American Indian Museum Stores Washington, D.C. & New York Vendor Product Proposal/ Jewelry  

E-Print Network [OSTI]

National Museum of the American Indian Museum Stores Washington, D.C. & New York Vendor Product Proposal/ Jewelry Submission to Museum Stores National Museum of the American Indian (NMAI) Our Museum Institution your craft for sale in our Museum Stores, vendor shall be responsible for complying with all

Mathis, Wayne N.

445

National Museum of the American Indian Museum Stores Washington, D.C. & New York Vendor Product Proposal/Books & Media  

E-Print Network [OSTI]

National Museum of the American Indian Museum Stores Washington, D.C. & New York Vendor Product Proposal/Books & Media Submission to Museum Stores National Museum of the American Indian (NMAI) Our Museum Institution your craft for sale in our Museum Stores, vendor shall be responsible for complying with all

Mathis, Wayne N.

446

INSECTICIDE RESISTANCE AND RESISTANCE MANAGEMENT Evaluating Western Corn Rootworm (Coleoptera: Chrysomelidae)  

E-Print Network [OSTI]

. 103(1): 147Ð157 (2010); DOI: 10.1603/EC09156 ABSTRACT Resistance management is essential susceptible (refuge) plants in either a separate section of the �eld adjacent to resistant (transgenic) plants

Ginzel, Matthew

447

Enhanced Resistance to Control Potato Tuberworm by Combining Engineered Resistance, Avidin, and Natural  

E-Print Network [OSTI]

Enhanced Resistance to Control Potato Tuberworm by Combining Engineered Resistance, Avidin & Edward J. Grafius Published online: 15 November 2008 # Potato Association of America 2008 Abstract Potato tuberworm, Phthorimaea operculella (Zeller), is a destructive insect pest of potato, Solanum tuberosum (L

Douches, David S.

448

High impact resistant ceramic composite  

DOE Patents [OSTI]

A ceramic material and a method of forming a ceramic material which possesses a high impact resistance are disclosed. The material comprises: (a) a first continuous phase of [beta]-SiC; and (b) a second phase of about 25-40 vol % TiB[sub 2]. Al[sub 2]O[sub 3] is preferably used as a densification aid. The material is formed by hot-pressing the mixture at a temperature from greater than about 1800 C to less than the transition temperature of [beta]-SiC to [alpha]-SiC. The hot-pressing is performed at a pressure of about 2000 psi to about 4000 psi in an inert atmosphere for several hours and results in the formation of a two phase sintered ceramic composite material. 6 figures.

Derkacy, J.A.

1991-07-16T23:59:59.000Z

449

Automatic insulation resistance testing apparatus  

DOE Patents [OSTI]

An apparatus and method for automatic measurement of insulation resistances of a multi-conductor cable. In one embodiment of the invention, the apparatus comprises a power supply source, an input measuring means, an output measuring means, a plurality of input relay controlled contacts, a plurality of output relay controlled contacts, a relay controller and a computer. In another embodiment of the invention the apparatus comprises a power supply source, an input measuring means, an output measuring means, an input switching unit, an output switching unit and a control unit/data logger. Embodiments of the apparatus of the invention may also incorporate cable fire testing means. The apparatus and methods of the present invention use either voltage or current for input and output measured variables.

Wyant, Francis J.; Nowlen, Steven P.; Luker, Spencer M.

2005-06-14T23:59:59.000Z

450

Experimental techniques and measurement accuracies  

SciTech Connect (OSTI)

A brief description of the experimental tools available for fusion neutronics experiments is given. Attention is paid to error estimates mainly for the measurement of tritium breeding ratio in simulated blankets using various techniques.

Bennett, E.F.; Yule, T.J.; DiIorio, G.; Nakamura, T.; Maekawa, H.

1985-02-01T23:59:59.000Z

451

High pressure discharges in cavities formed by microfabrication techniques  

SciTech Connect (OSTI)

High pressure discharges are the basis of small high intensity light sources. In this work, we demonstrate the formation of high pressure discharges, in cavities formed by applying micromachining and integrated circuit techniques to quartz substrates. Cavities containing varying amounts of mercury and argon were fabricated to obtain high pressure discharges. A high pressure mercury discharge was formed in the electrodeless cavities by exciting them with a microwave source, operating at 2.45 GHz and in the electroded cavities by applying a dc voltage. The contraction of the discharge into a high pressure arc was observed. A broad emission spectrum due to self-absorption and collisions between excited atoms and normal atoms, typical of high pressure mercury discharges, was measured. The light output and efficacy increased with increasing pressure. The measured voltage was used to estimate the pressure within the electroded cavities, which is as high as 127 atm for one of the two cavities discussed in this work. Efficacies over 40 lumens per watt were obtained for the electrodeless cavities and over 50 scr(l)m/W for the electroded cavities. {copyright} {ital 1997 American Institute of Physics.}

Khan, B.A.; Cammack, D.A.; Pinker, R.D.; Racz, J. [Philips Electronics North America Corporation, Philips Research, Briarcliff Manor, New York 10510 (United States)] [Philips Electronics North America Corporation, Philips Research, Briarcliff Manor, New York 10510 (United States)

1997-07-01T23:59:59.000Z

452

A survey of anthracnose resistant sorghum germplasm lines to identify additional resistance genes  

E-Print Network [OSTI]

and their inheritance characterized. The objectives of this study were (1) to determine if different sources of genetic resistance exist among a selected set of 13 resistant sorghum germplasm lines, and (2) to determine the inheritance of the different resistance genes...

Wiltse, Curtis Craig

2012-06-07T23:59:59.000Z

453

Optical fiber technique as a tool to improve combustion efficiency  

SciTech Connect (OSTI)

A multi-optical fiber technique is presented, which enables one to detect the flame propagation during non-knocking and knocking conditions in real production engines. The measurement technique is appropriate to detect knock onset locations and to describe the propagation of knocking reaction fronts. With this knowledge, the combustion chamber shape can be optimized, leading to a better knock resistance and higher combustion efficiencies. Results of flame propagation under non-knocking and knocking engine operating conditions are presented. In addition, correlations between knock onset locations and areas in which knock damage occurs are shown for different engines. Presented are the effects of combustion chamber modifications on the combustion efficiency, based on the analysis of the optical fiber measurements.

Spicher, U.; Krebs, R.

1990-01-01T23:59:59.000Z

454

THE ELECTRICAL RESISTIVITY METER IN FISHERY INVESTIGATIONS  

E-Print Network [OSTI]

THE ELECTRICAL RESISTIVITY METER IN FISHERY INVESTIGATIONS I Marine Biological Laboratory! WOODS RESISTIVITY METER IN FISHERY INVESTIGATIONS By Robert E. Lennon Fishery Research Biologist Appalachian Sport) BiblioKiMpliy : p. ]!. 1. Electric meters. 2. Water--Analysis. 3. Electric fishing. I. Title. ( Series

455

Radiation-Resistant Reconnaissance Robot Introduction Design  

E-Print Network [OSTI]

are water-moderated. This type of reactor consists of a deep pool filled with water, uranium fuel rods. Radiation Resistance Control/Communication The objective of this project is to develop a submersible radiation- resistant, tether-operated robot for use in a water-moderated reactor pool. 1. Radiation

Provancher, William

456

Investigation of Thermal Interface Materials Using Phase-Sensitive Transient Thermoreflectance Technique: Preprint  

SciTech Connect (OSTI)

With increasing power density in electronics packages/modules, thermal resistances at multiple interfaces are a bottleneck to efficient heat removal from the package. In this work, the performance of thermal interface materials such as grease, thermoplastic adhesives and diffusion-bonded interfaces are characterized using the phase-sensitive transient thermoreflectance technique. A multi-layer heat conduction model was constructed and theoretical solutions were derived to obtain the relation between phase lag and the thermal/physical properties. This technique enables simultaneous extraction of the contact resistance and bulk thermal conductivity of the TIMs. With the measurements, the bulk thermal conductivity of Dow TC-5022 thermal grease (70 to 75 um bondline thickness) was 3 to 5 W/(m-K) and the contact resistance was 5 to 10 mm2-K/W. For the Btech thermoplastic material (45 to 80 ?m bondline thickness), the bulk thermal conductivity was 20 to 50 W/(m-K) and the contact resistance was 2 to 5 mm2-K/W. Measurements were also conducted to quantify the thermal performance of diffusion-bonded interface for power electronics applications. Results with the diffusion-bonded sample showed that the interfacial thermal resistance is more than one order of magnitude lower than those of traditional TIMs, suggesting potential pathways to efficient thermal management.

Feng, X.; King, C.; DeVoto, D.; Mihalic, M.; Narumanchi, S.

2014-08-01T23:59:59.000Z

457

Review of uranium bioassay techniques  

SciTech Connect (OSTI)

A variety of analytical techniques is available for evaluating uranium in excreta and tissues at levels appropriate for occupational exposure control and evaluation. A few (fluorometry, kinetic phosphorescence analysis, {alpha}-particle spectrometry, neutron irradiation techniques, and inductively-coupled plasma mass spectrometry) have also been demonstrated as capable of determining uranium in these materials at levels comparable to those which occur naturally. Sample preparation requirements and isotopic sensitivities vary widely among these techniques and should be considered carefully when choosing a method. This report discusses analytical techniques used for evaluating uranium in biological matrices (primarily urine) and limits of detection reported in the literature. No cost comparison is attempted, although references are cited which address cost. Techniques discussed include: {alpha}-particle spectrometry; liquid scintillation spectrometry, fluorometry, phosphorometry, neutron activation analysis, fission-track counting, UV-visible absorption spectrophotometry, resonance ionization mass spectrometry, and inductively-coupled plasma mass spectrometry. A summary table of reported limits of detection and of the more important experimental conditions associated with these reported limits is also provided.

Bogard, J.S.

1996-04-01T23:59:59.000Z

458

Erasure Techniques in MRD codes  

E-Print Network [OSTI]

This book is organized into six chapters. The first chapter introduces the basic algebraic structures essential to make this book a self contained one. Algebraic linear codes and their basic properties are discussed in chapter two. In chapter three the authors study the basic properties of erasure decoding in maximum rank distance codes. Some decoding techniques about MRD codes are described and discussed in chapter four of this book. Rank distance codes with complementary duals and MRD codes with complementary duals are introduced and their applications are discussed. Chapter five introduces the notion of integer rank distance codes. The final chapter introduces some concatenation techniques.

W. B. Vasantha Kandasamy; Florentin Smarandache; R. Sujatha; R. S. Raja Durai

2012-05-03T23:59:59.000Z

459

A new localized corrosion monitoring technique for the evaluation of oilfield inhibitors  

SciTech Connect (OSTI)

Flow induced localized corrosion (FILC) is one of the major problems in the oilfield. Presently very few effective techniques are available for monitoring localized corrosion in oilfields. A new electrochemical technique was developed to provide a simple and effective way to monitor localized corrosion. The technique requires a potentiostat and a ZRA (zero resistance ammeter) as the measurement instrument. A special setup was designed to create a small anode and a large cathode. The technique was tested in a recirculating flow loop simulating FILC conditions. This technique was used to demonstrate the effectiveness of a corrosion inhibitor in mitigating localized corrosion. It can be further applied, both in the laboratory and in the field, to other areas where FILC is severe. 35 refs., 12 figs.

Fu, S.L.; Griffin, A.M.; Garcia, J.G. Jr. [Nalco/Exxon Energy Chemicals, L.P., Sugar Land, TX (United States); Yang, B. [Nalco Chemical Co., Naperville, IL (United States)

1996-08-01T23:59:59.000Z

460

Structure and Dynamics of Polymer Nanocomposites by Grazing-Incidence X-Ray Techniques (Presentation)  

Broader source: Energy.gov [DOE]

Presented at the High Temperature Membrane Working Group (HTMWG) Meeting held on October 10, 2007 in Washington, D.C.

Note: This page contains sample records for the topic "technique dc resistivity" 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

Corrosion resistant storage container for radioactive material  

DOE Patents [OSTI]

A corrosion resistant long-term storage container for isolating radioactive waste material in a repository. The container is formed of a plurality of sealed corrosion resistant canisters of different relative sizes, with the smaller canisters housed within the larger canisters, and with spacer means disposed between judxtaposed pairs of canisters to maintain a predetermined spacing between each of the canisters. The combination of the plural surfaces of the canisters and the associated spacer means is effective to make the container capable of resisting corrosion, and thereby of preventing waste material from leaking from the innermost canister into the ambient atmosphere.

Schweitzer, Donald G. (Bayport, NY); Davis, Mary S. (Wading River, NY)

1990-01-01T23:59:59.000Z

462

Corrosion resistant storage container for radioactive material  

DOE Patents [OSTI]

A corrosion resistant long-term storage container for isolating high-level radioactive waste material in a repository is claimed. The container is formed of a plurality of sealed corrosion resistant canisters of different relative sizes, with the smaller canisters housed within the larger canisters, and with spacer means disposed between juxtaposed pairs of canisters to maintain a predetermined spacing between each of the canisters. The combination of the plural surfaces of the canisters and the associated spacer means is effective to make the container capable of resisting corrosion, and thereby of preventing waste material from leaking from the innermost canister into the ambient atmosphere.

Schweitzer, D.G.; Davis, M.S.

1984-08-30T23:59:59.000Z

463

Data Mining: Concepts and Techniques  

E-Print Network [OSTI]

1 Data Mining: Concepts and Techniques (3rd ed.) -- Chapter 3 -- Jiawei Han, Micheline Kamber. All rights reserved. #12;2013/08/12 2 #12;33 Chapter 3: Data Preprocessing n Data Preprocessing: An Overview n Data Quality n Major Tasks in Data Preprocessing n Data Cleaning n Data Integration n Data

Geldenhuys, Jaco

464

Dissertation Imaging as Characterization Techniques  

E-Print Network [OSTI]

Telluride Photovoltaics The goal of increasing the efficiency of solar cell devices is a universal oneDissertation Imaging as Characterization Techniques for Thin-Film Cadmium Telluride Photovoltaics. Increased photovoltaic (PV) performance means an increase in competition with other energy tech- nologies

Sites, James R.

465

Self-consistent modeling of DC and microwave nitrogen discharges and their afterglows  

SciTech Connect (OSTI)

This report presents an investigation on the modeling of stationary DC and microwave nitrogen discharges and their afterglows, operating at pressures around one Torr and ionization degrees between 10-7-10-4. The model is based on the self-consistent solutions to the electron Boltzmann equation coupled to the rate balance equations for the most important neutral and charged species, the wave electrodynamics characteristics and the gas thermal balance equation. The results are obtained as a function of the usual discharge operating parameters, namely gas pressure, discharge current or electron density, and tube radius. It is shown that the vibrationally excited molecules play a central role in the whole problem, ensuring a strong link between different kinetics and directly contributing to the mechanisms of dissociation and gas heating. Furthermore, vibrationally excited molecules in high vibration levels are in the origin of the peaks observed in the flowing afterglow for the concentrations of several species, such as N{sub 2}(A {sup 3}{sigma}{sub g}{sup +}), N2(B 3{pi}g), N{sub 2}{sup +}(B {sup 2}{sigma}{sub u}{sup +}) and electrons, which occur downstream from the discharge after a dark zone as a consequence of the V-V up-pumping mechanism.

Guerra, Vasco [Centro de Fisica dos Plasmas, Instituto Superior Tecnico, 1049-001 Lisbon (Portugal)

2004-12-01T23:59:59.000Z

466

Finite Element Modelling of the Sawing of DC Cast AA2024 Aluminium Alloy Slabs  

SciTech Connect (OSTI)

In the semi-continuous casting of large cross-section rolling sheet ingots of high-strength aluminum alloys (2xxx and 7xxx series), the control of the residual (internal) stresses generated by the non-uniform cooling becomes a necessity. These stresses must be relieved by a thermal treatment before the head and foot of the ingot can be cut. Otherwise, the saw can be caught owing to compressive stresses or cut parts may be ejected thus injuring people or damaging equipment. These high added-value ingots need to be produced in secure conditions. Moreover, a better control of the sawing procedure could allow the suppression of the thermal treatment and therefore save time and energy. By studying the stress build-up during casting and the stress relief during sawing, key parameters for the control and optimization of the processing steps, can be derived. To do so, the direct chill (DC) casting of the AA2024 alloy is modeled with ABAQUS 6.5 with special attention to the thermo-mechanical properties of the alloy. The sawing operation is then simulated by removing mesh elements so as to reproduce the progression of the saw in the ingot. Preliminary results showing the stress relief during sawing accompanied by the risk of saw blocking due to compression or initiating a crack ahead of the saw, are analyzed with an approach based on the rate of strain energy release.

Drezet, J.-M. [Computational Materials Laboratory, School of Engineering, Ecole Polytechnique Federale de Lausanne, Station 12, CH-1015 Lausanne (Switzerland); Ludwig, O. [Calcom-ESI SA, PSE-A, CH-1015 Lausanne (Switzerland); Heinrich, B. [Alcan Aluminium Valais SA, CH3960 Sierre (Switzerland)

2007-04-07T23:59:59.000Z

467

Studies on optoelectronic properties of DC reactive magnetron sputtered CdTe thin films  

SciTech Connect (OSTI)

Cadmium telluride continues to be a leading candidate for the development of cost effective photovoltaics for terrestrial applications. In the present work two individual metallic targets of Cd and Te were used for the deposition of CdTe thin films on mica substrates from room temperature to 300 °C by DC reactive magnetron sputtering method. XRD patterns of CdTe thin films deposited on mica substrates exhibit peaks at 2? = 27.7°, 46.1° and 54.6°, which corresponds to reflection on (1 1 1), (2 2 0) and (3 1 1) planes of CdTe cubic structure. The intensities of XRD patterns increases with the increase of substrate temperature upto 150 °C and then it decreases at higher substrate temperatures. The conductivity of CdTe thin films measured from four probe method increases with the increase of substrate temperature. The activation energies (?E) are found to be decrease with the increase of substrate temperature. The optical transmittance spectra of CdTe thin films deposited on mica have a clear interference pattern in the longer wavelength region. The films have good transparency (T > 85 %) exhibiting interference pattern in the spectral region between 1200 – 2500 nm. The optical band gap of CdTe thin films are found to be in the range of 1.48 – 1.57. The refractive index, n decreases with the increase of wavelength, ?. The value of n and k increases with the increase of substrate temperature.

Kumar, B. Rajesh, E-mail: rajphyind@gmail.com [Department of Physics, Sri Venkateswara University, Tirupati - 517 502, A.P, India and Department of Physics, Sri Krishnadevaraya University, Anantapur - 515 003, A.P (India); Hymavathi, B.; Rao, T. Subba [Department of Physics, Sri Krishnadevaraya University, Anantapur - 515 003, A.P (India)

2014-01-28T23:59:59.000Z

468

PM brushless DC motor drive with a new power converter topology  

SciTech Connect (OSTI)

With the growing potential for widespread use of permanent magnet brushless dc motor drives (hereafter referred to as PMBDC drives) in many low-cost applications such as in hvac, refrigerators, and freezers in houses and small velocity servos in process industries, it has become important to minimize the cost. One obvious place for cost reduction is in the cost of the inverter and its associated controller. With that perspective, a novel application of the converter topology for the PMBDC known as C-dump in the switched reluctance motor drives is proposed in this paper. The advantages and disadvantages of this topology vis-a-vis the conventional 3 phase H-bridge converter, are highlighted from the points of view of economy in switches, volt ampere rating, associated controller cost, and packaging. Design considerations for the PMBDC motor are derived for use with the proposed converter topology. The operational and design characteristics of this converter driven PMBDC drive are derived for four quadrant performance. Guidelines for the design of the proposed performance. Guidelines for the design of the proposed topology are derived and presented in the paper. Experimental results from a laboratory prototype are presented to validate the feasibility of the proposed PMBDC drive system.

Krishnan, R.; Lee, S. [Virginia Polytechnic Inst. and State Univ., Blacksburg, VA (United States)

1995-12-31T23:59:59.000Z

469

Solid-state NMR studies for DC 745: April--May 2000  

SciTech Connect (OSTI)

Powles et al. reported in 1961 that pdydimethyl siloxane melts exhibit a transverse decay of nuclear spin magnetization (T{sub 2}) that is nonexponential. This observation was interpreted in terms of the proton NMR signal from the melt having characteristics of a broad line. Since then, similar findings were obtained for other polymer melts too. Accordingly to Powles et al. this peculiar proton line shape was the result of an intramolecular direct dipole-dipole interaction between a pair of protons. They also suggested that this dipolar interaction was weak because the dipolar interaction was motionally averaged since the orientation-dependent local dipolar field is modulated by molecular dynamics. In sum, the consequences and the origins of nuclear spin correlations in viscous polymer melts were recognized almost 4 decades ago. In the 1970s, Cohen-Addad suggested that these weak proton dipolar interactions could be used to characterize polymer melts and networks. In this work, we have used some of these ideas to probe the effects of thermal treatments on the proton spin-spin relaxation times for DC745.

Stephens, T.; Labouriau, A.

2000-12-01T23:59:59.000Z

470

Influence of the transverse dimension on the structure and properties of dc glow discharges  

SciTech Connect (OSTI)

Two-dimensional (2D) simulations of a dc glow discharge with a cold cathode in argon have been performed for various radii of the discharge tube. It is shown that the loss of the charged particles to the walls can significantly affect plasma parameters as well as properties of the cathode sheath. The longitude dimensions of the negative glow and Faraday dark space depend on the transverse loss of the charge particles and are not consistently predicted with a 1D model. The common assumption that the cathode sheath can be analyzed independently of the plasma also may not be valid. The transverse inhomogeneity of the plasma leads to a change in the current density distribution over the cathode surface. The thickness of the cathode sheath can vary with radial distance from the discharge axis, even for the case of negligible radial loss of the charge particles. The 2D model results provide an analysis of the conditions of applicability of the 1D model.

Bogdanov, E. A. [St. Petersburg State University, St. Petersburg 198904 (Russian Federation); Adams, S. F. [Air Force Research Laboratory, Wright-Patterson AFB, Ohio 45433 (United States); Demidov, V. I. [Department of Physics, West Virginia University, Morgantown, West Virginia 26506 (United States); Kudryavtsev, A. A. [Department of Optics, St. Petersburg State University, St. Petersburg 198904 (Russian Federation); Williamson, J. M. [UES, Inc., 4401 Dayton-Xenia Rd., Beavercreek, Ohio 45432 (United States)

2010-10-15T23:59:59.000Z

471

Computer model of the MFTF-B neutral beam Accel dc power supply  

SciTech Connect (OSTI)

Using the SCEPTRE circuit modeling code, a computer model was developed for the MFTF Neutral Beam Power Supply System (NBPSS) Accel dc Power Supply (ADCPS). The ADCPS provides 90 kV, 88 A, to the Accel Modulator. Because of the complex behavior of the power supply, use of the computer model is necessary to adequately understand the power supply's behavior over a wide range of load conditions and faults. The model developed includes all the circuit components and parameters, and some of the stray values. The model has been well validated for transients with times on the order of milliseconds, and with one exception, for steady-state operation. When using a circuit modeling code for a system with a wide range of time constants, it can become impossible to obtain good solutions for all time ranges at once. The present model concentrates on the millisecond-range transients because the compensating capacitor bank tends to isolate the power supply from the load for faster transients. Attempts to include stray circuit elements with time constants in the microsecond and shorter range have had little success because of huge increases in computing time that result. The model has been successfully extended to include the accel modulator.

Wilson, J.H.

1983-11-30T23:59:59.000Z

472

Improving the dynamic performance of a complex AC/DC system by HVDC control modifications  

SciTech Connect (OSTI)

The power system of Hydro-Quebec has a peak load of approximately 27 GW. The great distance between the production sites and the load centers introduces stability limitations, which is the reason why the Quebec grid cannot be economically synchronized (through ac transmission with limited capacity) with the U.S. northeastern network. Power exports are therefore dependent on the use of HVDC links of which Hydro-Quebec now possesses five, for a capacity of over 2600 MW. Such a capacity will again soon increase. At the moment, the Chateauguay scheme has the largest HVDC capacity. It transfers 1000 MW by means of two Back-to-Back converter blocks. Various automatic control systems are installed on the Chateauguay scheme owing to the fact that a single circuit of a 765 kV ac line transmits the output of both the HVDC converter stations as well as the output from Beauharnois hydro generating station. Such controls have performed satisfactorily since 1984. However, a remarkable improvement of the overall ac/dc system dynamic performance can be gained by making certain modifications in some of these HVDC system controls. This paper presents the salient features of such control modifications, currently under consideration, using the results of an investigation by digital and analogue simulations that demonstrate the achieved improvements.

Hammad, A.E. (ABB Power Systems, Baden (CH)); Gagnon, J. (Hydro Quebec, Montreal (CA)); McCallum, D. (IREQ, Montreal (CA))

1990-10-01T23:59:59.000Z

473

Design of a high power density, permanent magnet, axial gap dc motor  

SciTech Connect (OSTI)

In the design of drive motors for undersea vehicles, the premium placed on noise suppression suggests the use of a brush-commutated dc motor. The additional constraints of weight and volume, as well as unusual configuration, presents the axial air-gap configuration, with a permanent magnet field, as a viable candidate. In such a configuration the design of the brushes and commutator and the resulting structure becomes critical. The report describes a novel solution to this problem. The basic motor consists of two discs containing permanent magnets on either side of a magnetic structure containing the copper windings. An advantage of this motor concept is that copper cooling may easily be accomplished through the use of liquid circulating through the stator windings. The role of field and armature in a conventional disc motor configuration are reversed. The two discs containing the permanent magnets are rotating. The brushes are on the discs. The magnetic structure with the coils is stationary. The commutator bars are imbedded in the stationary member. Input power is supplied to the brushes through a brush-and-slip ring assembly. An electromagnetic design analysis for a 92 ft-lb, 700 rpm motor was performed. A finite element analysis has been conducted and the results show that magnetic saturation is not a limiting factor in this design. The motor torque is achievable within weight and volume constraints. 9 figs., 1 tab.

Hawsey, R.A.; Daniel, D.S.; Thomas, R.J. (Oak Ridge National Lab., TN (USA)); Bailey, J.M. (Tennessee Univ., Knoxville, TN (USA))

1990-01-01T23:59:59.000Z

474

Low noise charge sensitive preamplifier DC stabilized without a physical resistor  

DOE Patents [OSTI]

The invention is a novel charge sensitive preamplifier (CSP) which has no resistor in parallel with the feedback capacitor. No resetting circuit is required to discharge the feedback capacitor. The DC stabilization of the preamplifier is obtained by means of a second feedback loop between the preamplifier output and the common base transistor of the input cascode. The input transistor of the preamplifier is a Junction Field Transistor (JFET) with the gate-source junction forward biased. The detector leakage current flows into this junction. This invention is concerned with a new circuit configuration for a charge sensitive preamplifier and a novel use of the input Field Effect Transistor of the CSP itself. In particular this invention, in addition to eliminating the feedback resistor, eliminates the need for external devices between the detector and the preamplifier, and it eliminates the need for external circuitry to sense the output voltage and reset the CSP. Furthermore, the noise level of the novel CSP is very low, comparable with the performance achieved with other solutions. Experimental tests prove that this configuration for the charge sensitive preamplifier permits an excellent noise performance at temperatures including room temperature. An equivalent noise charge of less than 20 electrons r.m.s. has been measured at room temperature by using a commercial JFET as input device of the preamplifier.

Bertuccio, Giuseppe (Brianza, IT); Rehak, Pavel (Patchogue, NY); Xi, Deming (Beijing, CN)

1994-09-13T23:59:59.000Z

475

Low noise charge sensitive preamplifier DC stabilized without a physical resistor  

DOE Patents [OSTI]

The invention is a novel charge sensitive preamplifier (CSP) which has no resistor in parallel with the feedback capacitor. No resetting circuit is required to discharge the feedback capacitor. The DC stabilization of the preamplifier is obtained by means of a second feedback loop between the preamplifier output and the common base transistor of the input cascode. The input transistor of the preamplifier is a Junction Field Transistor (JFET) with the gate-source junction forward biased. The detector leakage current flows into this junction. This invention is concerned with a new circuit configuration for a charge sensitive preamplifier and a novel use of the input Field Effect Transistor of the CSP itself. In particular this invention, in addition to eliminating the feedback resistor, eliminates the need for external devices between the detector and the preamplifier, and it eliminates the need for external circuitry to sense the output voltage and reset the CSP. Furthermore, the noise level of the novel CSP is very low, comparable with the performance achieved with other solutions. Experimental tests prove that this configuration for the charge sensitive preamplifier permits an excellent noise performance at temperatures including room temperature. An equivalent noise charge of less than 20 electrons r.m.s. has been measured at room temperature by using a commercial JFET as input device of the preamplifier. 6 figs.

Bertuccio, G.; Rehak, P.; Xi, D.

1994-09-13T23:59:59.000Z

476

ALS Gives Chevron Scientists New Insights into Corrosion Resistance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

ALS Gives Chevron Scientists New Insights into Corrosion Resistance ALS Gives Chevron Scientists New Insights into Corrosion Resistance Print Thursday, 25 July 2013 13:44 In the...

477

New lithium-based ionic liquid electrolytes that resist salt...  

Energy Savers [EERE]

lithium-based ionic liquid electrolytes that resist salt concentration polarization New lithium-based ionic liquid electrolytes that resist salt concentration polarization...

478

Selection of a Wear-Resistant Tractor Drivetrain Material: Success...  

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

Selection of a Wear-Resistant Tractor Drivetrain Material: Success stories at the High Temperature Materials Laboratory (HTML) User Program Selection of a Wear-Resistant Tractor...

479

Test Procedure for UV Weathering Resistance of Backsheet | Department...  

Broader source: Energy.gov (indexed) [DOE]

Test Procedure for UV Weathering Resistance of Backsheet Test Procedure for UV Weathering Resistance of Backsheet Presented at the PV Module Reliability Workshop, February 26 - 27...

480

how many doses can you miss before resistance emerges?  

E-Print Network [OSTI]

Title: Adherence to antiretroviral HIV drugs: how many doses can you miss before resistance emerges? Abstract. The emergence of drug resistance is one of the ...

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


481

Erosion-Resistant Nanocoatings for Improved Energy Efficiency...  

Broader source: Energy.gov (indexed) [DOE]

Erosion-Resistant Nanocoatings for Improved Energy Efficiency in Gas Turbine Engines Erosion-Resistant Nanocoatings for Improved Energy Efficiency in Gas Turbine Engines...

482

Oxygen Diffusion (OD) Dramatically Improves Wear-Resistance of...  

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

Oxygen Diffusion (OD) Dramatically Improves Wear-Resistance of Titanium Oxygen Diffusion (OD) Dramatically Improves Wear-Resistance of Titanium 2007 Diesel Engine-Efficiency &...

483

High PID Resistant Cross-Linked Encapsulnt Based on Polyolefin...  

Broader source: Energy.gov (indexed) [DOE]

are some concern about thermal creep resistance We have developed new polyolefin encapsulant "SOLAR ASCE TM" , which is based on high electrical resistivity polyolefin...

484

Use of Management and Operating or Other Facility Management Contractor Employees for Services to DOE in the Washington, D.C., Area  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To establish policies and procedures for management of DOE, including NNSA, Management and Operating (M&O) and other facility management contractor employees assigned to the Washington, D.C., area. Cancels DOE O 350.2.

2003-10-29T23:59:59.000Z

485

Presented at ACADIA 2000 Conference, Washington, D.C., October 2000 and published in the Proceedings of the ACADIA 2000 Conference.  

E-Print Network [OSTI]

in the Proceedings of the ACADIA 2000 Conference. This work was supported by the Assistant Secretary for EnergyLBNL-45548 DR-437 Presented at ACADIA 2000 Conference, Washington, D.C., October 2000 and published

486

Analysis of system wide distortion in an integrated power system utilizing a high voltage DC bus and silicon carbide power devices  

E-Print Network [OSTI]

This research investigates the distortion on the electrical distribution system for a high voltage DC Integrated Power System (IPS). The analysis was concentrated on the power supplied to a propulsion motor driven by an ...

Fallier, William F. (William Frederick)

2007-01-01T23:59:59.000Z

487

Microstructures and electrical resistivities of the RuO{sub 2} electrode on SiO{sub 2}/Si annealed in the oxygen ambient  

SciTech Connect (OSTI)

The electrical resistivity property of RuO{sub 2} thin films grown on the SiO{sub 2}/Si substrate by reactive dc sputtering was examined in terms of microstructure using x-ray diffraction and cross-sectional transmission electron microscopy. As the samples were annealed in the oxygen ambient over the temperature range 300{endash}700{degree}C, the resistivity decreased from 270 to 90 {mu}{Omega}cm with increasing annealing temperature. When heat treatment was performed below 500{degree}C, the strain which accumulated in the RuO{sub 2} layer during deposition was released without significant increase in grain size. It is thought that below 500{degree}C the improvement in the crystallinity plays an important role in the variation of the resistivity. Although a considerable amount of growth of RuO{sub 2} grains was achieved, the columnar structure of the RuO{sub 2} layer in the as-deposited sample remained unchanged even after annealing at 700{degree}C. The resistivity improvement above 500{degree}C was driven mainly by the grain boundary annihilation. {copyright} {ital 1996 Materials Research Society.}

Lee, J.S.; Kwon, H.J.; Jeong, Y.W.; Kim, H.H.; Kim, C.Y. [LG Electronics Research Center, 16, Woomyeon-dong, Seocho-gu, Seoul 137-140 (Korea)

1996-11-01T23:59:59.000Z

488

P-Glycoprotein Structure and Chemotherapy Resistance  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

The protein, called P-glycoprotein, or P-gp for short, is one of the main reasons cancer cells are resistant to chemotherapy drugs. Understanding its structure may help...

489

High Temperature Oxidation Resistance and Surface Electrical...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

with Filtered Arc Cr-Al-N Abstract: The requirements for low cost and high-tempurater corrosion resistance for bipolar interconnect plates in solid oxide fuel cell (SOFC) stacks...

490

Engineered Surfaces to Resist Corrosion and Wear  

E-Print Network [OSTI]

MATS4007 Engineered Surfaces to Resist Corrosion and Wear Course Outline Session 2, 2014 School.................................................................................................4 Part III Corrosion and Control) LG07 Lecturer 28 Jul 1 Introduction to friction and wear JH Introduction to corrosion SC 4 Aug 2

New South Wales, University of

491

Bayesian estimation of resistivities from seismic velocities   

E-Print Network [OSTI]

I address the problem of finding a background model for the estimation of resistivities in the earth from controlled-source electromagnetic (CSEM) data by using seismic data and well logs as constraints. Estimation of ...

Werthmüller, Dieter

2014-06-30T23:59:59.000Z

492

Impact Resistance of Stitched Composites and Metacomposites ...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Impact Resistance of Stitched Composites and Metacomposites Apr 07 2015 10:00 AM - 11:00 AM Dr. K. T. Tan, Assistant Professor, Dept of Mechanical Engrng, University of Akron,...

493

Genomic analysis of hepatic insulin resistance  

E-Print Network [OSTI]

Type II Diabetes mellitus is a genetically complex disease characterized by insulin resistance in peripheral tissues, which results in simultaneous hyperglycemia and hyperinsulinemia. Because of the prevalence of type II ...

Raab, R. Michael

2006-01-01T23:59:59.000Z

494

Osmotic pressure: resisting or promoting DNA ejection from phage  

E-Print Network [OSTI]

Recent in vitro experiments have shown that DNA ejection from bacteriophage can be partially stopped by surrounding osmotic pressure when ejected DNA is digested by DNase I on the course of ejection. We argue in this work by combination of experimental techniques (osmotic suppression without DNaseI monitored by UV absorbance, pulse-field electrophoresis, and cryo-EM visualization) and simple scaling modeling that intact genome (i.e. undigested) ejection in a crowded environment is, on the contrary, enhanced or eventually complete with the help of a pulling force resulting from DNA condensation induced by the osmotic stress itself. This demonstrates that in vivo, the osmotically stressed cell cytoplasm will promote phage DNA ejection rather than resisting it. The further addition of DNA-binding proteins under crowding conditions is shown to enhance the extent of ejection. We also found some optimal crowding conditions for which DNA content remaining in the capsid upon ejection is maximum, which correlates well...

Jeembaeva, Meerim; Larsson, Frida; Evilevitch, Alex

2008-01-01T23:59:59.000Z

495

Pressure Resistance Welding of High Temperature Metallic Materials  

SciTech Connect (OSTI)

Engineers from the Idaho National Laboratory (INL) have demonstrated an innovative method for seal or pinch welding stainless steel tubing. Sometimes a tube has fuel or contamination that must be contained, or the tube needs to be shortened or cut for handling, and the tube needs to have a guaranteed sealed weld that is both quick and easy. This technique was demonstrated in a laboratory using a resistance welding system with specially designed electrodes to ensure a tube end is seal welded or if a long tube is to be shortened, the severed ends are seal welded. The unique electrodes design is integral to achieving the sealed ends. This process could readily be adapted for robotic--remote handling or for contact handling in a glovebox or hood.

Larry Zirker; Craig Tyler

2010-08-01T23:59:59.000Z

496

Method of manufacturing a shapeable short-resistant capacitor  

SciTech Connect (OSTI)

A method that employs a novel combination of conventional fabrication techniques provides a ceramic short-resistant capacitor that is bendable and/or shapeable to provide a multiple layer capacitor that is extremely compact and amenable to desirable geometries. The method allows thinner and more flexible ceramic capacitors to be made. The method includes forming a first thin metal layer on a substrate; depositing a thin, ceramic dielectric layer over the metal layer; depositing a second thin metal layer over the dielectric layer to form a capacitor exhibiting a benign failure mode; and separating the capacitor from the substrate. The method may also include bending the resulting capacitor into a serpentine arrangement with gaps between the layers that allow venting of evaporated electrode material in the event of a benign failure.

Taylor, Ralph S.; Myers, John D.; Baney, William J.

2013-04-02T23:59:59.000Z

497

Oxidation resistant coatings for ceramic matrix composite components  

SciTech Connect (OSTI)

Corrosion resistant Ca{sub 0.6}Mg{sub 0.4}Zr{sub 4}(PO{sub 4}){sub 6} (CMZP) and Ca{sub 0.5}Sr{sub 0.5}Zr{sub 4}(PO{sub 4}){sub 6} (CS-50) coatings for fiber-reinforced SiC-matrix composite heat exchanger tubes have been developed. Aqueous slurries of both oxides were prepared with high solids loading. One coating process consisted of dipping the samples in a slip. A tape casting process has also been created that produced relatively thin and dense coatings covering a large area. A processing technique was developed, utilizing a pre-sintering step, which produced coatings with minimal cracking.

Vaubert, V.M.; Stinton, D.P. [Oak Ridge National Lab., TN (United States); Hirschfeld, D.A. [New Mexico Inst. of Mining and Technology, Socorro, NM (United States). Dept. of Materials and Metallurgical Engineering

1998-11-01T23:59:59.000Z

498

Computer Simulation and Experimental Validation on the Oxidation and Sulfate Corrosion Resistance of Novel Chromium Based High Temperature Alloys  

SciTech Connect (OSTI)

This report summarizes our recent works of ab initio molecular dynamics inter-atomic potentials development on dilute rare earth element yttrium (Y) etc. doped chromium (Cr) alloy systems, its applications in oxidation and corrosion resistance simulation, and experiment validation on the candidate systems. The simulation methods, experimental validation techniques, achievements already reached, students training, and future improvement are briefly introduced.

Yang, Shizhong

2013-02-28T23:59:59.000Z

499

Using CrAIN Multilayer Coatings to Improve Oxidation Resistance of Steel Interconnects for Solid Oxide Fuel Cell Stacks  

SciTech Connect (OSTI)

The requirements of low cost and high-tempurature corrosion resistance for bipolar interconnect plates in solid oxide fuel cell stacks has directed attention to the use of metal plates with oxidation resistant coatings. We have investigatedt he performance of steel plates with multilayer coatings consisting of CrN for electrical conductivity and CrAIN for oxidation resistance. The coatings were deposited usin large area filterd arc deposition technolgy, and subsequently annealed in air for up to 25 hours at 800 degrees celsius. The composition, structer and morphology of the coated plates were characterized using RBS, nuclear reaction analysis, AFM and TEM techniques. By altering the architecture of the layers within the coatings, the rate of oxidation was reduced by more than an order of magnitute. Electrical resistance was measured at room temperature.

Smith, Richard J.; Tripp, C.; Knospe, Anders; Ramana, C. V.; Gorokhovsky, Vladimir I.; Shutthanandan, V.; Gelles, David S.

2004-06-01T23:59:59.000Z

500

Resistivity changes in carbon-implanted Teflon  

E-Print Network [OSTI]

. . 11 Carbon Disnibution vs Depth for 50 kV Implantation . . . . . . . . . . . . . . . . . . . 13 15 17 18 12 Experiment III Resistance Curve 19 CHAPTERI INTRODUCTION Motivation Dr. Ron R. Hart of Texas ARM's Nuclear Engineering Department... UNDERGRADUATE RESEARCH FELLOW April 2004 Major: Nuclear Engineering RESISTIVITY CHANGES IN CARBON-IMPLANTED TEFLON A Senior Honors Thesis by MATTHEW R. JACKSON Submitted to the Office of Honors Programs k Academic Scholarships Texas A&M University...

Jackson, Matthew R.

2013-02-22T23:59:59.000Z