Sample records for impedes efficiency print

  1. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer Solar Cells Impedes Efficiency Print Organic

  2. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer Solar Cells Impedes Efficiency Print

  3. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer Solar Cells Impedes Efficiency PrintStructure

  4. Efficient Electromechanical (E/M) Impedance Measuring Method for Active Sensor Structural Health Monitoring

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    1 Efficient Electromechanical (E/M) Impedance Measuring Method for Active Sensor Structural Health an impedance analyzer that reads the in-situ E/M impedance of the piezoelectric wafer active sensors (PWAS an improved algorithm for efficient measurement of the E/M impedance using PWAS transducers. Instead of using

  5. acoustic impedance: Topics by E-print Network

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

    Nassir Navab 6 ACOUSTIC IMPEDANCE INVERSION FOR STATIC AND DYNAMIC CHARACTERIZATION OF A CO2 EOR PROJECT, Fossil Fuels Websites Summary: ACOUSTIC IMPEDANCE INVERSION FOR STATIC...

  6. acoustic impedance inversion: Topics by E-print Network

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

    Topic Index 1 ACOUSTIC IMPEDANCE INVERSION FOR STATIC AND DYNAMIC CHARACTERIZATION OF A CO2 EOR PROJECT, Fossil Fuels Websites Summary: ACOUSTIC IMPEDANCE INVERSION FOR STATIC...

  7. alternating current impedance: Topics by E-print Network

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

    impedance tomography which seeks the electrical defects, such as cracks or voids, in metals 5, 6, 34, 63, 71, 129. Electrical impedance tomography has Borcea, Liliana 68...

  8. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer Solar Cells Impedes Efficiency

  9. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructure of All-Polymer Solar Cells Impedes EfficiencyStructure of

  10. acoustic impedance constructed: Topics by E-print Network

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

    in text books. Implementing the notion of impedance matching as a way to understand eficiency of energy transmission in elastic collisions, we find a solution which frames...

  11. Printed circuit board impedance matching step for microwave (millimeter wave) devices

    DOE Patents [OSTI]

    Pao, Hsueh-Yuan; Aguirre, Jerardo; Sargis, Paul

    2013-10-01T23:59:59.000Z

    An impedance matching ground plane step, in conjunction with a quarter wave transformer section, in a printed circuit board provides a broadband microwave matching transition from board connectors or other elements that require thin substrates to thick substrate (>quarter wavelength) broadband microwave (millimeter wave) devices. A method of constructing microwave and other high frequency electrical circuits on a substrate of uniform thickness, where the circuit is formed of a plurality of interconnected elements of different impedances that individually require substrates of different thicknesses, by providing a substrate of uniform thickness that is a composite or multilayered substrate; and forming a pattern of intermediate ground planes or impedance matching steps interconnected by vias located under various parts of the circuit where components of different impedances are located so that each part of the circuit has a ground plane substrate thickness that is optimum while the entire circuit is formed on a substrate of uniform thickness.

  12. E-Print Network 3.0 - ac impedance spectroscopy Sample Search...

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

    impedance spectroscopy and direct current chargedischarge methods... . Keywords Supercapacitor, characterization, Impedance Spectroscopy, Constant Current charge... Impedance...

  13. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 1 A Rigorous and Efficient Analysis of 3D Printed

    E-Print Network [OSTI]

    Aksun, M. Irsadi

    IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 1 A Rigorous and Efficient Analysis of 3D Printed of structures with multiple vertical strips running in multilayer environment. Index Terms-- Multilayered 3D is developed to accurately simulate 3D structures in multilayer environment [1], and to simultaneously simulate

  14. 19.4% -EFFICIENT LARGE AREA REAR-PASSIVATED SCREEN-PRINTED SILICON SOLAR CELLS T. Dullweber*1

    E-Print Network [OSTI]

    be reduced by applying the PERC (passivated emitter and rear cell) solar cell design [8]. The following19.4% -EFFICIENT LARGE AREA REAR-PASSIVATED SCREEN-PRINTED SILICON SOLAR CELLS T. Dullweber*1 , S% in the near future. Keywords: Silicon Solar Cell, Screen Printing, Rear Passivation 1 Introduction About 80

  15. assessment demonstrates efficient: Topics by E-print Network

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

    could Renewable Energy Websites Summary: efficiency and could lead to a doubling of third-generation solar cell efficiencies. Tiny quantum dots even solar fuels. Researchers at the...

  16. 18.9 %-EFFICIENT SCREEN-PRINTED SOLAR CELLS APPLYING A PRINT-ON-PRINT Helge Hannebauer1

    E-Print Network [OSTI]

    is caused by an improved short circuit current of up to 37.4 mA/cm2 which is explained by the reduced loss and hence increase the short circuit current (Jsc). However, in case of standard single printed Ag

  17. Tunable microwave impedance matching to a high impedance source using a Josephson metamaterial

    SciTech Connect (OSTI)

    Altimiras, Carles, E-mail: carles.altimiras@sns.it; Parlavecchio, Olivier; Joyez, Philippe; Vion, Denis; Roche, Patrice; Esteve, Daniel; Portier, Fabien [Service de Physique de l’Etat Condensé (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette (France)] [Service de Physique de l’Etat Condensé (CNRS URA 2464), IRAMIS, CEA Saclay, 91191 Gif-sur-Yvette (France)

    2013-11-18T23:59:59.000Z

    We report the efficient coupling of a 50??? microwave circuit to a high impedance conductor. We use an impedance transformer consisting of a ?/4 co-planar resonator whose inner conductor contains an array of superconducting quantum interference devices (SQUIDs), providing it with a tunable lineic inductance L?80??{sub 0}, resulting in a characteristic impedance Z{sub C}?1?k?. The impedance matching efficiency is characterized by measuring the shot noise power emitted by a dc biased tunnel junction connected to the resonator. We demonstrate matching to impedances in the 15 to 35?k? range with bandwidths above 100?MHz around a resonant frequency tunable between 4 and 6 GHz.

  18. area efficient architecture: Topics by E-print Network

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

    Architectures through Application Clustering and Architectural Heterogeneity Lukasz energy-efficient designs for embedded systems. This work explores the benefits of...

  19. application agronomic efficiency: Topics by E-print Network

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

    of operations commonly applied in state Seinstra, Frank J. 4 Application Guidelines for Energy Efficient Motors Texas A&M University - TxSpace Summary: , higher costs and...

  20. affect bleaching efficiency: Topics by E-print Network

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

    unfriendly bleaching agents (perborates and percarbonates), which cause aquatic eutrophication, although without these compounds detergents are much less efficient for the...

  1. assess efficiency implications: Topics by E-print Network

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

    for hardware verification. Such languages must verification community has formal models for assessing the efficiency of an event sequence language, none Fisler, Kathryn...

  2. acid generation efficiency: Topics by E-print Network

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

    Websites Summary: Dye-Sentitized Solar Cells (DSSCs) are an emerging low-cost third generation photovoltaic light-to -electricity conversion efficiency in early...

  3. aerobic efficiency measuring: Topics by E-print Network

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

    R-10 minimum 1.50sq foot Space Heating and Cooling ENERGY EFFICIENCY MEASURES Residential Eligible Measures List 12;Category Kammen, Daniel M. 4 Microsensor measurements of...

  4. automobile efficiency standards: Topics by E-print Network

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

    California) or 916654-5106, or send2005 BUILDING ENERGY EFFICIENCY STANDARDS FOR RESIDENTIAL AND NONRESIDENTIAL BUILDINGS Effective STANDARDSREGULATIONS CALIFORNIA ENERGY...

  5. abstraction reaction efficiencies: Topics by E-print Network

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

    depend on the molecular size. The ratio becomes closer Okamoto, Koichi 22 Merging DBMs Efficiently Extended Abstract Alexandre David1 Computer Technologies and Information...

  6. advanced high efficiency: Topics by E-print Network

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

    to 100 devices, including memory and logic. Josephson junctions are widely used in superconduct- ing quantum Nadgorny, Boris 65 Design of Efficient Java Communications for High...

  7. assistance improve efficiency: Topics by E-print Network

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

    Abstract. Global warming, rising energy prices and increasing awareness of "green" customers have brought energy efficient manufacturing on top of the agenda Boyer,...

  8. assessment energy efficient: Topics by E-print Network

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

    assessment energy efficient First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Energy Efficiency -...

  9. advanced energy efficient: Topics by E-print Network

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

    advanced energy efficient First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Energy Efficiency & Renewable...

  10. Advanced prototyping of variable impedance prosthetic sockets for trans-tibial amputees : polyjet matrix 3D printing of comfortable prosthetic sockets using digital anatomical data

    E-Print Network [OSTI]

    Sengeh, David Moinina

    2012-01-01T23:59:59.000Z

    This work, supported by the Media Lab Consortium, evaluates the design of a Variable Impedance Prosthetic (VIPr) socket for a transtibial amputee using computer-aided design and manufacturing (CAD/CAM). Compliant features ...

  11. Design and Analysis of Digitally Modulated Transmitters for Efficiency Enhancement

    E-Print Network [OSTI]

    YE, LU

    2013-01-01T23:59:59.000Z

    Measured efficient improvements with drain impedance11]. . . . . . . . . . . . . . . . Efficiency enhancementand drain efficiency versus frequency. . . . . . . . . . .

  12. affects production efficiency: Topics by E-print Network

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

    shows that energy efficiency projects' non-energy benefits often exceed the value of energy savings, so energy savings should... Pye, M. First Page Previous Page 1 2 3 4 5 6 7...

  13. appliance efficiency standards: Topics by E-print Network

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

    auditsenergy efficiency. Experience shows that it does little good to provide energy audit McMahon, James E.; Wiel, Stephen 2001-01-01 10 New analysis techniques for estimating...

  14. asympotical efficient estimates: Topics by E-print Network

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

    non-asymptotic oracle inequalities for the robust risks have been derived and the robust efficiency of the model selection procedure has been shown. Konev, Victor 2010-01-01 49...

  15. achieving operational efficiency: Topics by E-print Network

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

    more environmentally responsible and reduce cost by improving operational efficiency. Raytheon is a leader in their ... McKenney, Kurtis G. (Kurtis Gifford), 1979- 2012-01-01 3...

  16. achieve efficient signal: Topics by E-print Network

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

    more environmentally responsible and reduce cost by improving operational efficiency. Raytheon is a leader in their ... McKenney, Kurtis G. (Kurtis Gifford), 1979- 2012-01-01 16...

  17. Design of a 3.3 V analog video line driver with controlled output impedance

    E-Print Network [OSTI]

    Ramachandran, Narayan Prasad

    2004-09-30T23:59:59.000Z

    impedance of the line. The main requirements for design are high output swing, high linearity, matched impedance to the line and power efficiency. These requirements are addressed by a class AB amplifier whose output impedance can be controlled through...

  18. achieving energy efficiency: Topics by E-print Network

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

    achieving energy efficiency First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Real Time Monitoring:...

  19. aircraft energy efficiency: Topics by E-print Network

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

    aircraft energy efficiency First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Design Drivers of...

  20. Novel Low Cost Organic Vapor Jet Printing of Striped High Efficiency Phosphorescent OLEDs for White Lighting

    SciTech Connect (OSTI)

    Mike Hack

    2008-12-31T23:59:59.000Z

    In this program, Universal Display Corporation and University of Michigan proposed to integrate three innovative concepts to meet the DOE's Solid State Lighting (SSL) goals: (1) high-efficiency phosphorescent organic light emitting device (PHOLED{trademark}) technology, (2) a white lighting design that is based on a series of red, green and blue OLED stripes, and (3) the use of a novel cost-effective, high rate, mask-less deposition process called organic vapor jet printing (OVJP). Our PHOLED technology offers up to four-times higher power efficiency than other OLED approaches for general lighting. We believe that one of the most promising approaches to maximizing the efficiency of OLED lighting sources is to produce stripes of the three primary colors at such a pitch (200-500 {mu}m) that they appear as a uniform white light to an observer greater than 1 meter (m) away from the illumination source. Earlier work from a SBIR Phase 1 entitled 'White Illumination Sources Using Striped Phosphorescent OLEDs' suggests that stripe widths of less than 500 {mu}m appear uniform from a distance of 1m without the need for an external diffuser. In this program, we intend to combine continued advances in this PHOLED technology with the striped RGB lighting design to demonstrate a high-efficiency, white lighting source. Using this background technology, the team has focused on developing and demonstrating the novel cost-effective OVJP process to fabricate these high-efficiency white PHOLED light sources. Because this groundbreaking OVJP process is a direct printing approach that enables the OLED stripes to be printed without a shadow mask, OVJP offers very high material utilization and high throughput without the costs and wastage associated with a shadow mask (i.e. the waste of material that deposits on the shadow mask itself). As a direct printing technique, OVJP also has the potential to offer ultra-high deposition rates (> 1,000 Angstroms/second) for any size or shaped features. As a result, we believe that this work will lead to the development of a cost-effective manufacturing solution to produce very-high efficiency OLEDs. By comparison to more common ink-jet printing (IJP), OVJP can also produce well-defined patterns without the need to pattern the substrate with ink wells or to dry/anneal the ink. In addition, the material set is not limited by viscosity and solvent solubility. During the program we successfully demonstrated a 6-inch x 6-inch PHOLED lighting panel consisting of fine-featured red, green and blue (R-G-B) stripes (1mm width) using an OVJP deposition system that was designed, procured and installed into UDC's cleanroom as part of this program. This project will significantly accelerate the DOE's ability to meet its 2015 DOE SSL targets of 70-150 lumens/Watt and less than $10 per 1,000 lumens for high CRI lighting index (76-90). Coupled with a low cost manufacturing path through OVJP, we expect that this achievement will enable the DOE to achieve its 2015 performance goals by the year 2013, two years ahead of schedule. As shown by the technical work performed under this program, we believe that OVJP is a very promising technology to produce low cost, high efficacy, color tunable light sources. While we have made significant progress to develop OVJP technology and build a pilot line tool to study basic aspects of the technology and demonstrate a lighting panel prototype, further work needs to be performed before its full potential and commercial viability can be fully assessed.

  1. articular prosthetic device: Topics by E-print Network

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

    of variable impedance prosthetic sockets for trans-tibial amputees : polyjet matrix 3D printing of comfortable prosthetic sockets using digital anatomical data MIT - DSpace...

  2. anatomic variables affecting: Topics by E-print Network

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

    of variable impedance prosthetic sockets for trans-tibial amputees : polyjet matrix 3D printing of comfortable prosthetic sockets using digital anatomical data MIT - DSpace...

  3. 19th European Photovoltaic Solar Energy Conference Pre-Print 4AV.1.45 QUANTUM EFFICIENCY OF CdTe SOLAR CELLS IN FORWARD BIAS

    E-Print Network [OSTI]

    Sites, James R.

    19th European Photovoltaic Solar Energy Conference Pre-Print 4AV.1.45 QUANTUM EFFICIENCY OF CdTe SOLAR CELLS IN FORWARD BIAS M. Gloeckler and J. R. Sites Department of Physics, Colorado State@lamar.colostate.edu ABSTRACT: When the quantum efficiency of a CdS/CdTe solar cell is measured under forward voltage

  4. Impedance-matched drilling telemetry system

    DOE Patents [OSTI]

    Normann, Randy A. (Edgewood, NM); Mansure, Arthur J. (Albuquerque, NM)

    2008-04-22T23:59:59.000Z

    A downhole telemetry system that uses inductance or capacitance as a mode through which signal is communicated across joints between assembled lengths of pipe wherein efficiency of signal propagation through a drill string, for example, over multiple successive pipe segments is enhanced through matching impedances associated with the various telemetry system components.

  5. Superconducting active impedance converter

    DOE Patents [OSTI]

    Ginley, D.S.; Hietala, V.M.; Martens, J.S.

    1993-11-16T23:59:59.000Z

    A transimpedance amplifier for use with high temperature superconducting, other superconducting, and conventional semiconductors allows for appropriate signal amplification and impedance matching to processing electronics. The amplifier incorporates the superconducting flux flow transistor into a differential amplifier configuration which allows for operation over a wide temperature range, and is characterized by high gain, relatively low noise, and response times less than 200 picoseconds over at least a 10-80 K. temperature range. The invention is particularly useful when a signal derived from either far-IR focal plane detectors or from Josephson junctions is to be processed by higher signal/higher impedance electronics, such as conventional semiconductor technology. 12 figures.

  6. A microwave impedance meter

    E-Print Network [OSTI]

    Boaz, Virgil Layfaette

    1961-01-01T23:59:59.000Z

    Automatic Impedance Recorder for X-R d, " ~PIRE, V I. 42, 2 Pt. , I'Et, . Hewlett-Packard, "Operat ing Notes f' or IX'Iodel '. 5A 'lavegu I de F'hase Shifter, " Hewlett-Packard Co. , 275 Psd e Mi 1 I Road, Pale Alto, Cal ~ (Ilo date} Johnson, Welter C... the necessary equipment is not expensive. However, slotted-line measurements and impedance calculations are very time consuming and tedious. 1 ~ gaiter C. Johnson?T n Chapter 7, pp, lo5 1&!6, McGraw Hill Sock Company, inci ~ kew York, New York; 1...

  7. Superconducting active impedance converter

    DOE Patents [OSTI]

    Ginley, David S. (Albuquerque, NM); Hietala, Vincent M. (Placitas, NM); Martens, Jon S. (Albuquerque, NM)

    1993-01-01T23:59:59.000Z

    A transimpedance amplifier for use with high temperature superconducting, other superconducting, and conventional semiconductor allows for appropriate signal amplification and impedance matching to processing electronics. The amplifier incorporates the superconducting flux flow transistor into a differential amplifier configuration which allows for operation over a wide temperature range, and is characterized by high gain, relatively low noise, and response times less than 200 picoseconds over at least a 10-80 K. temperature range. The invention is particularly useful when a signal derived from either far-IR focal plane detectors or from Josephson junctions is to be processed by higher signal/higher impedance electronics, such as conventional semiconductor technology.

  8. Impedance calculation for ferrite inserts

    SciTech Connect (OSTI)

    Breitzmann, S.C.; Lee, S.Y.; /Indiana U.; Ng, K.Y.; /Fermilab

    2005-01-01T23:59:59.000Z

    Passive ferrite inserts were used to compensate the space charge impedance in high intensity space charge dominated accelerators. They study the narrowband longitudinal impedance of these ferrite inserts. they find that the shunt impedance and the quality factor for ferrite inserts are inversely proportional to the imaginary part of the permeability of ferrite materials. They also provide a recipe for attaining a truly passive space charge impedance compensation and avoiding narrowband microwave instabilities.

  9. Impedance Measurement Box

    ScienceCinema (OSTI)

    Christophersen, Jon

    2013-05-28T23:59:59.000Z

    Energy storage devices, primarily batteries, are now more important to consumers, industries and the military. With increasing technical complexity and higher user expectations, there is also a demand for highly accurate state-of-health battery assessment techniques. IMB incorporates patented, proprietary, and tested capabilities using control software and hardware that can be part of an embedded monitoring system. IMB directly measures the wideband impedance spectrum in seconds during battery operation with no significant impact on service life. It also can be applied to batteries prior to installation, confirming health before entering active service, as well as during regular maintenance. For more information about this project, visit http://www.inl.gov/rd100/2011/impedance-measurement-box/

  10. Multiport Impedance Quantization

    E-Print Network [OSTI]

    Firat Solgun; David P. DiVincenzo

    2015-05-15T23:59:59.000Z

    With the increase of complexity and coherence of superconducting systems made using the principles of circuit quantum electrodynamics, more accurate methods are needed for the characterization, analysis and optimization of these quantum processors. Here we introduce a new method of modelling that can be applied to superconducting structures involving multiple Josephson junctions, high-Q superconducting cavities, external ports, and voltage sources. Our technique, an extension of our previous work on single-port structures [1], permits the derivation of system Hamiltonians that are capable of representing every feature of the physical system over a wide frequency band and the computation of T1 times for qubits. We begin with a black box model of the linear and passive part of the system. Its response is given by its multiport impedance function Zsim(w), which can be obtained using a finite-element electormagnetics simulator. The ports of this black box are defined by the terminal pairs of Josephson junctions, voltage sources, and 50 Ohm connectors to high-frequency lines. We fit Zsim(w) to a positive-real (PR) multiport impedance matrix Z(s), a function of the complex Laplace variable s. We then use state-space techniques to synthesize a finite electric circuit admitting exactly the same impedance Z(s) across its ports; the PR property ensures the existence of this finite physical circuit. We compare the performance of state-space algorithms to classical frequency domain methods, justifying their superiority in numerical stability. The Hamiltonian of the multiport model circuit is obtained by using existing lumped element circuit quantization formalisms [2, 3]. Due to the presence of ideal transformers in the model circuit, these quantization methods must be extended, requiring the introduction of an extension of the Kirchhoff voltage and current laws.

  11. Optically stimulated differential impedance spectroscopy

    DOE Patents [OSTI]

    Maxey, Lonnie C; Parks, II, James E; Lewis, Sr., Samuel A; Partridge, Jr., William P

    2014-02-18T23:59:59.000Z

    Methods and apparatuses for evaluating a material are described. Embodiments typically involve use of an impedance measurement sensor to measure the impedance of a sample of the material under at least two different states of illumination. The states of illumination may include (a) substantially no optical stimulation, (b) substantial optical stimulation, (c) optical stimulation at a first wavelength of light, (d) optical stimulation at a second wavelength of light, (e) a first level of light intensity, and (f) a second level of light intensity. Typically a difference in impedance between the impedance of the sample at the two states of illumination is measured to determine a characteristic of the material.

  12. Correlation of PDN Impedance with Jitter and Voltage Margin for High Speed Channels

    E-Print Network [OSTI]

    Swaminathan, Madhavan

    Correlation of PDN Impedance with Jitter and Voltage Margin for High Speed Channels Vishal Laddha vishal.laddha@gatech.edu, madhavan.swaminathan@ece.gatech.edu Abstract: Timing margin (jitter and plane cutouts is a major source of jitter and noise introduced by the package and the printed circuit

  13. Monolithically compatible impedance measurement

    DOE Patents [OSTI]

    Ericson, Milton Nance (Knoxville, TN); Holcomb, David Eugene (Oak Ridge, TN)

    2002-01-01T23:59:59.000Z

    A monolithic sensor includes a reference channel and at least one sensing channel. Each sensing channel has an oscillator and a counter driven by the oscillator. The reference channel and the at least one sensing channel being formed integrally with a substrate and intimately nested with one another on the substrate. Thus, the oscillator and the counter have matched component values and temperature coefficients. A frequency determining component of the sensing oscillator is formed integrally with the substrate and has an impedance parameter which varies with an environmental parameter to be measured by the sensor. A gating control is responsive to an output signal generated by the reference channel, for terminating counting in the at least one sensing channel at an output count, whereby the output count is indicative of the environmental parameter, and successive ones of the output counts are indicative of changes in the environmental parameter.

  14. Ultra-wideband impedance sensor

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1999-01-01T23:59:59.000Z

    The ultra-wideband impedance sensor (UWBZ sensor, or Z-sensor) is implemented in differential and single-ended configurations. The differential UWBZ sensor employs a sub-nanosecond impulse to determine the balance of an impedance bridge. The bridge is configured as a differential sample-and-hold circuit that has a reference impedance side and an unknown impedance side. The unknown impedance side includes a short transmission line whose impedance is a function of the near proximity of objects. The single-ended UWBZ sensor eliminates the reference side of the bridge and is formed of a sample and hold circuit having a transmission line whose impedance is a function of the near proximity of objects. The sensing range of the transmission line is bounded by the two-way travel time of the impulse, thereby eliminating spurious Doppler modes from large distant objects that would occur in a microwave CW impedance bridge. Thus, the UWBZ sensor is a range-gated proximity sensor. The Z-sensor senses the near proximity of various materials such as metal, plastic, wood, petroleum products, and living tissue. It is much like a capacitance sensor, yet it is impervious to moisture. One broad application area is the general replacement of magnetic sensors, particularly where nonferrous materials need to be sensed. Another broad application area is sensing full/empty levels in tanks, vats and silos, e.g., a full/empty switch in water or petroleum tanks.

  15. Ultra-wideband impedance sensor

    DOE Patents [OSTI]

    McEwan, T.E.

    1999-03-16T23:59:59.000Z

    The ultra-wideband impedance sensor (UWBZ sensor, or Z-sensor) is implemented in differential and single-ended configurations. The differential UWBZ sensor employs a sub-nanosecond impulse to determine the balance of an impedance bridge. The bridge is configured as a differential sample-and-hold circuit that has a reference impedance side and an unknown impedance side. The unknown impedance side includes a short transmission line whose impedance is a function of the near proximity of objects. The single-ended UWBZ sensor eliminates the reference side of the bridge and is formed of a sample and hold circuit having a transmission line whose impedance is a function of the near proximity of objects. The sensing range of the transmission line is bounded by the two-way travel time of the impulse, thereby eliminating spurious Doppler modes from large distant objects that would occur in a microwave CW impedance bridge. Thus, the UWBZ sensor is a range-gated proximity sensor. The Z-sensor senses the near proximity of various materials such as metal, plastic, wood, petroleum products, and living tissue. It is much like a capacitance sensor, yet it is impervious to moisture. One broad application area is the general replacement of magnetic sensors, particularly where nonferrous materials need to be sensed. Another broad application area is sensing full/empty levels in tanks, vats and silos, e.g., a full/empty switch in water or petroleum tanks. 2 figs.

  16. antimicrobial efficient hole-punching: Topics by E-print Network

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

    peptides, sometimes dismissed for their lack ... Barbero, Roberto Juan 2012-01-01 112 SM Energy-Efficient Energy Storage, Conversion and Utilization Websites Summary:...

  17. applying eco-efficiency analise: Topics by E-print Network

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

    The significance of environmental protection (more) Jiang, Jiangshan 2012-01-01 19 Eco-Efficiency in Practice: Aligning Business and Environmental Interests in the Upstream...

  18. I/O impedance controller

    DOE Patents [OSTI]

    Ruesch, Rodney; Jenkins, Philip N.; Ma, Nan

    2004-03-09T23:59:59.000Z

    There is disclosed apparatus and apparatus for impedance control to provide for controlling the impedance of a communication circuit using an all-digital impedance control circuit wherein one or more control bits are used to tune the output impedance. In one example embodiment, the impedance control circuit is fabricated using circuit components found in a standard macro library of a computer aided design system. According to another example embodiment, there is provided a control for an output driver on an integrated circuit ("IC") device to provide for forming a resistor divider network with the output driver and a resistor off the IC device so that the divider network produces an output voltage, comparing the output voltage of the divider network with a reference voltage, and adjusting the output impedance of the output driver to attempt to match the output voltage of the divider network and the reference voltage. Also disclosed is over-sampling the divider network voltage, storing the results of the over sampling, repeating the over-sampling and storing, averaging the results of multiple over sampling operations, controlling the impedance with a plurality of bits forming a word, and updating the value of the word by only one least significant bit at a time.

  19. A Theory of Impedance Control based on Internal Model Uncertainty 

    E-Print Network [OSTI]

    Mitrovic, Djordje; Klanke, Stefan; Vijayakumar, Sethu; Haith, Adrian

    2009-01-01T23:59:59.000Z

    Efficient human motor control is characterised by an extensive use of joint impedance modulation, which to a large extent is achieved by co-contracting antagonistic muscle pairs in a way that is beneficial to the specific task. Studies in single...

  20. Impedance effects on beam stability

    E-Print Network [OSTI]

    Mounet, N; Buffat, X; Herr, W; Métral, E; Rumolo, G; Salvant, B

    2012-01-01T23:59:59.000Z

    In 2012, attempts to increase the bunch intensity, decrease the emittance and reduce the collimators gaps in the LHC, will potentially make the detrimental effects due to the machine impedance more critical. Extrapolating the data accumulated in 2010 and 2011, in several foreseen scenarios, the headtail modes at top energy will require an increase of the current in the octupoles installed in the LHC. In the worst case, instead of around 200 A in the defocusing octupoles and ? 200 A in the focusing ones as at the end of the 2011 physics run, the octupoles’ current will have to be increased to around ± 450 A.

  1. Gene expression in physically impeded maize roots

    E-Print Network [OSTI]

    Huang, Ying-Fei

    1996-01-01T23:59:59.000Z

    , Physical Impedance: Overview. Significance in agriculture. Morphological changes of cmp roots in response to physical impedance Plant hormones and physical hnpedance. Ca2+, Sitpud Transduction and Physical Impedance. . . . . III MATERIALS AND METHODS.... , 1994; Allen and Tiwari 1991) and calsequestrin (Chou et al. , 1989; Krause et al. , 1989). CHAPTER IH MATERIALS AND METHODS Germination and Growth Conditions Plant material Maize (Zea mays L. ) cv TX 5855 was used as the research material. Seeds...

  2. Surface Impedance Tomography for Antarctic Sea Ice

    E-Print Network [OSTI]

    Golden, Kenneth M.

    Surface Impedance Tomography for Antarctic Sea Ice C. Sampsona , K. M. Goldena , A. Gullya , A. P, Australia Abstract During the 2007 SIPEX expedition in pack ice off the coast of East Antarctica, we measured the electrical conductivity of sea ice via surface impedance tomography. Resistance data from

  3. Investigation of a high impedance magnetically insulated transmission line oscillator with hollow load

    SciTech Connect (OSTI)

    Zhou Heng; Shu Ting; Li Zhiqiang [College of Opto-electric Science and Engineering, National University of Defense Technology, Hunan 410073 (China)

    2012-09-15T23:59:59.000Z

    A novel high-impedance magnetically insulated transmission line oscillator (MILO) with greatly restrained power deposition on the anode has been investigated. Methods to increase the MILO impedance and decrease the anode current are discussed. A MILO with impedance of 30 {Omega} and power conversion efficiency of 25% is presented by particle-in-cell simulations. Compared with the previous MILO in our lab, the anode current of the proposed MILO is reduced about 50%, the power conversion efficiency doubles, and the power deposition on anode is reduced nearly one half. Furthermore, considerations for reducing the power deposition on load have also been carried out in MILO design, and the load current is reduced to 4.6 kA, only 17% of the total anode current. Finally, a hollow load was introduced to reduce the power deposition density on the load, without decreasing the power conversion efficiency.

  4. acoustic impedance tests: Topics by E-print Network

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

    DETAILS Engineering Websites Summary: no electrical connection, and requires a lift bucket for access, a new approach was needed to enable AE testing Figure 2: Weatherproof...

  5. ac impedance techniques: Topics by E-print Network

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

    used to describe the nuclear control system. The approach is based on the existing AECL approach that was the only formal specification technique applied to nuclear control...

  6. ac impedance study: Topics by E-print Network

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

    high chromaticity. White, S 2014-01-01 37 Study of supplementary controls for embedded HVDC links in a AC power system. Open Access Theses and Dissertations Summary: ??This...

  7. arm mechanical impedance: Topics by E-print Network

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

    mechanical arm control system and some of the lines of thought which led to this design. In particular, the paper discusses the basic systme required in order for the arm to...

  8. aminoguanidine impedes human: Topics by E-print Network

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

    ACTUATION A CO-DESIGN SOLUTION TO THE SAFETYPERFORMANCE TRADEOFF IN PHYSICAL HUMAN-ROBOT INTERACTION CiteSeer Summary: This Thesis deals with the problem to ensure performance...

  9. Directional impedance of geared transmissions

    E-Print Network [OSTI]

    Wang, Albert Duan

    2012-01-01T23:59:59.000Z

    The purpose of this research is to develop a design tool for geared actuation systems that experience bidirectional exchange of energy with the environment. Despite the asymmetry of efficiency depending on the direction ...

  10. Barriers to Industrial Energy Efficiency- Study (Appendix A), June 2015

    Broader source: Energy.gov [DOE]

    This study examines barriers that impede the adoption of energy efficient technologies and practices in the industrial sector, and identifies successful examples and opportunities to overcome these...

  11. Barriers to Industrial Energy Efficiency- Report to Congress, June 2015

    Broader source: Energy.gov [DOE]

    This report examines barriers that impede the adoption of energy efficient technologies and practices in the industrial sector, and identifies successful examples and opportunities to overcome...

  12. 3D Printing of Scintillating Materials

    E-Print Network [OSTI]

    Y. Mishnayot; M. Layani; I. Cooperstein; S. Magdassi; G. Ron

    2014-06-15T23:59:59.000Z

    We demonstrate, for the first time, the applicability of 3D printing technique to the manufacture of scintillation detectors. We report of a formulation, usable in stereolithographic printing, that exhibits scintillation efficiency on the order of 30\\% of that of commercial polystyrene based scintillators. We discuss the applicability of these techniques and propose future enhancements that will allow tailoring the printed scintillation detectors to various application.

  13. 3D Printing of Scintillating Materials

    E-Print Network [OSTI]

    Mishnayot, Y; Cooperstein, I; Magdassi, S; Ron, G

    2014-01-01T23:59:59.000Z

    We demonstrate, for the first time, the applicability of 3D printing technique to the manufacture of scintillation detectors. We report of a formulation, usable in stereolithographic printing, that exhibits scintillation efficiency on the order of 30\\% of that of commercial polystyrene based scintillators. We discuss the applicability of these techniques and propose future enhancements that will allow tailoring the printed scintillation detectors to various application.

  14. Structure of All-Polymer Solar Cells Impedes Efficiency

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

    promising material combinations (polymerfullerene, polymerinorganic, all-polymer, and dye-sensitized cells), seeking a deeper understanding of their fundamental structure,...

  15. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over Our Instagram

  16. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solid ... Strengthening a solidRadiationStructureStructure of

  17. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solid ... Strengthening a solidRadiationStructureStructure

  18. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solid ... Strengthening a

  19. Structure of All-Polymer Solar Cells Impedes Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengthening a solid ... Strengthening aStructure of All-Polymer Solar Cells

  20. Colloidal microstructures, transport, and impedance properties within interfacial microelectrodes

    E-Print Network [OSTI]

    Ounaies, Zoubeida

    , we employ in situ optical microscopy and impedance measurements to systematically measure micro; published online 30 May 2007 The authors report in situ measurements of the reversible, electric fieldColloidal microstructures, transport, and impedance properties within interfacial microelectrodes

  1. Impedance measurements for the early warning detection of epileptic seizures

    E-Print Network [OSTI]

    Glass, Michael Scott

    1989-01-01T23:59:59.000Z

    Chair of Advisory Committee: Dr. Gerald Miller A two electrode impedance measurement system was designed and tested as a detection device for the early warning of epileptic seizures. Previous methods have used four electrode impedance measurement... concentration of the medium. Miller and Gerber recently introduced the technique of using impedance measurements in the ECS for the early warning detection of epileptic seizures [12]. The impedance measurement system consisted of a probe with four...

  2. Diagnosis of PEMFC Stack Failures via Electrochemical Impedance Spectroscopy.

    E-Print Network [OSTI]

    Victoria, University of

    reported prototype of its type. The stack was used to perform galvanostatic, impedance measurements in situ the stack. The effects on individual cell and stack impedance were studied by measuring the changes in stack and cell impedances under flooding or dehydration conditions. Dehydration effects were measurable over

  3. The frequency dependent impedance of an HVdc converter

    SciTech Connect (OSTI)

    Wood, A.R.; Arrillaga, J. [Univ. of Canterbury, Christchurch (New Zealand)] [Univ. of Canterbury, Christchurch (New Zealand)

    1995-07-01T23:59:59.000Z

    A linear and direct method of determining the frequency dependent impedance of a 12 pulse HVdc converter is presented. Terms are developed for both the dc and ac side impedances of the converter, including the effect of the firing angle control system, the commutation period, and the variability of the commutation period. The impedance predictions are verified by dynamic simulation.

  4. Evaluating impedances in a Sacherer integral equation

    SciTech Connect (OSTI)

    Zhang, S.Y.; Weng, W.T.

    1994-08-01T23:59:59.000Z

    In Sacherer integral equation, the beam line density is expanded on the phase deviation {phi}, generating a Hankel spectrum, rather than on the time, which generates a Fourier spectrum. This is a natural choice to deal with the particle evolution in phase space, it however causes complications whenever the impedance corresponding to the spectrum has to be evaluated. In this article, the line density expansion on {phi} is shown to be equivalent to a beam time modulation under an acceptable condition. Therefore for a Hankel spectrum, a number of sidebands, and the corresponding impedance as well, will be involved. For wideband resonators, it is shown that the original Sacherer solution is adequate. For narrowband resonators, the solution had been compromised, therefore a modification may be needed.

  5. Superconducting surface impedance under radiofrequency field

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

    Xiao, Binping [JLAB, William and Mary College; Reece, Charles E. [JLAB; Kelley, Michael J. [JLAB, William and Mary College

    2013-07-01T23:59:59.000Z

    Based on BCS theory with moving Cooper pairs, the electron states distribution at 0K and the probability of electron occupation with finite temperature have been derived and applied to anomalous skin effect theory to obtain the surface impedance of a superconductor under radiofrequency (RF) field. We present the numerical results for Nb and compare these with representative RF field-dependent effective surface resistance measurements from a 1.5 GHz resonant structure.

  6. Superconducting fault current-limiter with variable shunt impedance

    DOE Patents [OSTI]

    Llambes, Juan Carlos H; Xiong, Xuming

    2013-11-19T23:59:59.000Z

    A superconducting fault current-limiter is provided, including a superconducting element configured to resistively or inductively limit a fault current, and one or more variable-impedance shunts electrically coupled in parallel with the superconducting element. The variable-impedance shunt(s) is configured to present a first impedance during a superconducting state of the superconducting element and a second impedance during a normal resistive state of the superconducting element. The superconducting element transitions from the superconducting state to the normal resistive state responsive to the fault current, and responsive thereto, the variable-impedance shunt(s) transitions from the first to the second impedance. The second impedance of the variable-impedance shunt(s) is a lower impedance than the first impedance, which facilitates current flow through the variable-impedance shunt(s) during a recovery transition of the superconducting element from the normal resistive state to the superconducting state, and thus, facilitates recovery of the superconducting element under load.

  7. Print http://us.mg4.mail.yahoo.comfneo/launch?.rand=deOsgk04ks40i Subject: Re: [s-w-h] Solar verses wind efficiency

    E-Print Network [OSTI]

    Print http://us.mg4.mail.yahoo.comfneo/launch?.rand=deOsgk04ks40i Subject: Re: [s-w-h] Solar verses. A single nominal 100 watt solar panel for 4 sun hours/day would yield -4 kWh/day or 12 kWh/month. At $2 returns NO > QUESTIONS ASKED full refund if our customers feel SoWr > will not fit their needs But do you

  8. An adaptive algorithm for the detection of high impedance faults on power distribution systems

    E-Print Network [OSTI]

    McCall, Kurt Eric

    1990-01-01T23:59:59.000Z

    of Science in Electrical Engineering. The objective is to design an adaptive algorithm that will automatically detect high impedance faults on a utility power distribution line or in other power systems. The algorithm is efficient enough to perform... it is impossible to have personnel continuously monitor many lines to detect these situations, an automated solution is needed. A fault detection device will have to be able to recognize abnormal situations by monitoring the electrical condition of the lines...

  9. Report on the source of the electrochemical impedance on cermet inert anodes

    SciTech Connect (OSTI)

    Windisch, C.F. Jr.; Stice, N.D.

    1991-02-01T23:59:59.000Z

    the Inert Electrode Program at Pacific Northwest Laboratory (PNL) is supported by the Office of Industrial Processes of the US Department of Energy and is aimed at improving the energy efficiency of Hall-Heroult cells through the development of inert anodes. The inert anodes currently under study are composed of a cermet material of the general composition NiO-NiFe{sub 2}O{sub 4}-Cu. The program has three primary objectives: (a) to evaluate the anode material in a scaled-up, pilot cell facility, (b) to investigate the mechanisms of the electrochemical reactions at the anode surface, and (c) to develop sensors for monitoring anode and/or electrolyte conditions. This report covers the results of a portion of the studies on anode reaction mechanisms. The electrochemical impedances of cermet inert anodes in alumina-saturated molten cryolite as a function of frequency, current density, and time indicated that a significant component of the impedance is due to the gas bubbles produced at the anode during electrolysis. The data also showed a connection between surface structure and impedance that appears to be related to the effects of surface structure on bubble flow. Given the results of this work, it is doubtful that a resistive film contributes significantly to the electrochemical impedances on inert anodes. Properties previously assigned to such a film are more likely due to the bubbles and those factors that affect the properties and dynamics of the bubbles at the anode surface. 12 refs., 16 figs., 3 tabs.

  10. Minding the Gap Makes for More Efficient Solar Cells

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

    Minding the Gap Makes for More Efficient Solar Cells Minding the Gap Makes for More Efficient Solar Cells Print Thursday, 19 December 2013 11:01 Using novel materials to develop...

  11. Characterization of thermoelectric elements and devices by impedance...

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

    Characterization of thermoelectric elements and devices by impedance spectroscopy Home Author: A. D. Downey, T. P. Hogan, B. Cook Year: 2007 Abstract: This article describes a new...

  12. Multi-gap high impedance plasma opening switch

    DOE Patents [OSTI]

    Mason, R.J.

    1996-10-22T23:59:59.000Z

    A high impedance plasma opening switch having an anode and a cathode and at least one additional electrode placed between the anode and cathode is disclosed. The presence of the additional electrodes leads to the creation of additional plasma gaps which are in series, increasing the net impedance of the switch. An equivalent effect can be obtained by using two or more conventional plasma switches with their plasma gaps wired in series. Higher impedance switches can provide high current and voltage to higher impedance loads such as plasma radiation sources. 12 figs.

  13. Multi-gap high impedance plasma opening switch

    DOE Patents [OSTI]

    Mason, Rodney J. (Los Alamos, NM)

    1996-01-01T23:59:59.000Z

    A high impedance plasma opening switch having an anode and a cathode and at least one additional electrode placed between the anode and cathode. The presence of the additional electrodes leads to the creation of additional plasma gaps which are in series, increasing the net impedance of the switch. An equivalent effect can be obtained by using two or more conventional plasma switches with their plasma gaps wired in series. Higher impedance switches can provide high current and voltage to higher impedance loads such as plasma radiation sources.

  14. Printing and papermaking: Energy consumption and conservation. (Latest citations from the Paper and Board, Printing, and Packaging Industries Research Associations database). Published Search

    SciTech Connect (OSTI)

    Not Available

    1993-06-01T23:59:59.000Z

    The bibliography contains citations concerning energy consumption and energy efficient design innovations for papermaking and printing equipment and operations. Economic analysis of energy utilization, computer controlled operations, energy efficient driers for papermaking and printing processes, ventilation systems, and heat recovery technology are included. (Contains a minimum of 181 citations and includes a subject term index and title list.)

  15. Development of DSP-based Electromechanical (E/M) Impedance Analyzer for Active Structural Health Monitoring

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    an impedance analyzer that reads the in-situ E/M impedance of piezoelectric wafer active sensors (PWAS system. First, two types of impedance measurement approaches were evaluated in a PC-based simplified impedance analyzer system. It was found that the first approach, which measures impedance frequency

  16. Scheme for rapid adjustment of network impedance

    DOE Patents [OSTI]

    Vithayathil, John J. (3814 NE. 136th Pl., Portland, OR 97230)

    1991-01-01T23:59:59.000Z

    A static controlled reactance device is inserted in series with an AC electric power transmission line to adjust its transfer impedance. An inductor (reactor) is serially connected with two back-to-back connected thyristors which control the conduction period and hence the effective reactance of the inductor. Additional reactive elements are provided in parallel with the thyristor controlled reactor to filter harmonics and to obtain required range of variable reactance. Alternatively, the static controlled reactance device discussed above may be connected to the secondary winding of a series transformer having its primary winding connected in series to the transmission line. In a three phase transmission system, the controlled reactance device may be connected in delta configuration on the secondary side of the series transformer to eliminate triplen harmonics.

  17. Wave guide impedance matching method and apparatus

    DOE Patents [OSTI]

    Kronberg, James W. (Beech Island, SC)

    1990-01-01T23:59:59.000Z

    A technique for modifying the end portion of a wave guide, whether hollow or solid, carrying electromagnetic, acoustic or optical energy, to produce a gradual impedance change over the length of the end portion, comprising the cutting of longitudinal, V-shaped grooves that increase in width and depth from beginning of the end portion of the wave guide to the end of the guide so that, at the end of the guide, no guide material remains and no surfaces of the guide as modified are perpendicular to the direction of energy flow. For hollow guides, the grooves are cut beginning on the interior surface; for solid guides, the grooves are cut beginning on the exterior surface. One or more resistive, partially conductive or nonconductive sleeves can be placed over the exterior of the guide and through which the grooves are cut to smooth the transition to free space.

  18. BROADBAND IDENTIFICATION OF BATTERY ELECTRICAL IMPEDANCE FOR HEV

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to perform impedance measurements on a battery cell. Moreover, spectral coherence is an advanced parameterBROADBAND IDENTIFICATION OF BATTERY ELECTRICAL IMPEDANCE FOR HEV R. Al-Nazer, V. Cattin, M. Montaru). In such applications, the most possible accurate estimation of the battery states is needed to optimize its operation

  19. Method of estimating pulse response using an impedance spectrum

    DOE Patents [OSTI]

    Morrison, John L; Morrison, William H; Christophersen, Jon P; Motloch, Chester G

    2014-10-21T23:59:59.000Z

    Electrochemical Impedance Spectrum data are used to predict pulse performance of an energy storage device. The impedance spectrum may be obtained in-situ. A simulation waveform includes a pulse wave with a period greater than or equal to the lowest frequency used in the impedance measurement. Fourier series coefficients of the pulse train can be obtained. The number of harmonic constituents in the Fourier series are selected so as to appropriately resolve the response, but the maximum frequency should be less than or equal to the highest frequency used in the impedance measurement. Using a current pulse as an example, the Fourier coefficients of the pulse are multiplied by the impedance spectrum at corresponding frequencies to obtain Fourier coefficients of the voltage response to the desired pulse. The Fourier coefficients of the response are then summed and reassembled to obtain the overall time domain estimate of the voltage using the Fourier series analysis.

  20. Development of High-Throughput Microfluidic Impedance Spectroscopy Platform for Analyzing Microdroplets in Droplet Microfluidic System 

    E-Print Network [OSTI]

    Sobahi, Nebras MohammedKamal A.

    2014-07-22T23:59:59.000Z

    This thesis presents the development of a high-throughput microfluidic impedance spectroscopy platform for electrically detecting analyzing impedance measurements of non-contact and label free microdroplets. This microfluidic impedance spectroscopy...

  1. Analytical Expression for the Impedance Response of an Insertion Electrode Cell

    E-Print Network [OSTI]

    . Electrochemical impedance spectroscopy EIS technique has been extensively used in the analysis of lithium battery to simulate the impedance behavior of lithium batteries, Doyle et al.13 simulated the impedance response

  2. Development of High-Throughput Microfluidic Impedance Spectroscopy Platform for Analyzing Microdroplets in Droplet Microfluidic System

    E-Print Network [OSTI]

    Sobahi, Nebras MohammedKamal A.

    2014-07-22T23:59:59.000Z

    This thesis presents the development of a high-throughput microfluidic impedance spectroscopy platform for electrically detecting analyzing impedance measurements of non-contact and label free microdroplets. This microfluidic impedance spectroscopy...

  3. Windows XP - LPR Printing

    E-Print Network [OSTI]

    dbrown

    2004-07-27T23:59:59.000Z

    Printer Setup in Windows XP. To print to the math department printers in Windows XP, “Print Services for Unix” must be installed. To begin installation of “

  4. Phenomenological method of calculating microwave longitudinal coupling impedances

    SciTech Connect (OSTI)

    Giordano, S.; Votruba, J.

    1980-05-01T23:59:59.000Z

    A previous paper described an investigation of the longitudinal coupling impedance of the TM/sub olm/ modes in the ISA vacuum chamber. A method was developed for calculating these impedances by using the data derived from pertubation measurements. This method gave accurate results between 2.6 and 2.8 GHz, but above 2.8 GHz measurements became difficult because of the mixing of the TM/sub olm/ modes with other modes. This paper presents a phenomenological approach for calculating these impedances based on previously developed concepts.

  5. Low Impedance Bellows for High-current Beam Operations

    SciTech Connect (OSTI)

    Wu, G; Nassiri, A; Waldschmidt, G J; Yang, Y; Feingold, J J; Mammosser, J D; Rimmer, R A; Wang, H; Jang, J

    2012-07-01T23:59:59.000Z

    In particle accelerators, bellows are commonly used to connect beamline components. Such bellows are traditionally shielded to lower the beam impedance. Excessive beam impedance can cause overheating in the bellows, especially in high beam current operation. For an SRF-based accelerator, the bellows must also be particulate free. Many designs of shielded bellows incorporate rf slides or fingers that prevent convolutions from being exposed to wakefields. Unfortunately these mechanical structures tend to generate particulates that, if left in the SRF accelerator, can migrate into superconducting cavities, the accelerator's critical components. In this paper, we describe a prototype unshielded bellows that has low beam impedance and no risk of particulate generation.

  6. Impedance Mismatch study between the Microwave Generator and the PUPR Plasma Machine

    SciTech Connect (OSTI)

    Gaudier, Jorge R.; Castellanos, Ligeia; Encarnacion, Kabir; Zavala, Natyaliz; Rivera, Ramon; Farahat, Nader; Leal, Edberto [Polytechnic University of Puerto Rico, San Juan, 00919-2017 (Puerto Rico)

    2006-12-04T23:59:59.000Z

    Impedance mismatch inside the connection from the microwave power generator to the plasma machine is studied. A magnetron power generator transmits microwaves of 2.45 GHz and variable power from 50W to 5000W, through a flexible rectangular waveguide to heat plasma inside a Mirror Cusp devise located at the Polytechnic University of Puerto Rico. Before the production of plasma, the residual gas of the devise must be extracted by a vacuum system (5Torr or better), then Argon gas is injected to the machine. The microwaves heat the Argon ions to initiate ionization and plasma is produced. A dielectric wall is used inside the rectangular waveguide to isolate the plasma machine and maintain vacuum. Even though the dielectric will not block the wave propagation, some absorption of microwaves will occur. This absorption will cause reflection, reducing the efficiency of the power transfer. Typically a thin layer of Teflon is used, but measurements using this dielectric show a significant reflection of power back to the generator. Due to the high-power nature of the generator (5KW), this mismatch is not desirable. An electromagnetic field solver based on the Finite Difference Time Domain Method(FDTD) is used to model the rectangular waveguide connection. The characteristic impedance of the simulation is compared with the analytical formula expression and a good agreement is obtain. Furthermore the Teflon-loaded guide is modeled using the above program and the input impedance is computed. The reflection coefficient is calculated based on the transmission line theory with the characteristic and input impedances. Based on the simulation results it is possible to optimize the thickness, shape and dielectric constant of the material, in order to seal the connection with a better match.

  7. Expectation propagation for nonlinear inverse problems – with an application to electrical impedance tomography

    SciTech Connect (OSTI)

    Gehre, Matthias, E-mail: mgehre@math.uni-bremen.de [Center for Industrial Mathematics, University of Bremen, Bremen D-28344 (Germany)] [Center for Industrial Mathematics, University of Bremen, Bremen D-28344 (Germany); Jin, Bangti, E-mail: bangti.jin@gmail.com [Department of Mathematics, University of California, Riverside, University Ave. 900, Riverside, CA 92521 (United States)] [Department of Mathematics, University of California, Riverside, University Ave. 900, Riverside, CA 92521 (United States)

    2014-02-15T23:59:59.000Z

    In this paper, we study a fast approximate inference method based on expectation propagation for exploring the posterior probability distribution arising from the Bayesian formulation of nonlinear inverse problems. It is capable of efficiently delivering reliable estimates of the posterior mean and covariance, thereby providing an inverse solution together with quantified uncertainties. Some theoretical properties of the iterative algorithm are discussed, and the efficient implementation for an important class of problems of projection type is described. The method is illustrated with one typical nonlinear inverse problem, electrical impedance tomography with complete electrode model, under sparsity constraints. Numerical results for real experimental data are presented, and compared with that by Markov chain Monte Carlo. The results indicate that the method is accurate and computationally very efficient.

  8. Acoustic modes in combustors with complex impedances and multidimensional active

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Acoustic modes in combustors with complex impedances and multidimensional active flames F. Nicoud-acoustic modes in combustors. In the case of a non-isothermal reacting medium, the wave equation for the pressure

  9. Quantitative characterization of multi-variable human ankle mechanical impedance

    E-Print Network [OSTI]

    Lee, Hyunglae

    2013-01-01T23:59:59.000Z

    Ankle mechanical impedance, which is a dynamic relationship between angular displacement and the corresponding torque at the ankle joint, plays a key role in natural interaction of the lower-extremity with the environment. ...

  10. Analysis of Impedance Response in Lithium-ion Battery Electrodes

    E-Print Network [OSTI]

    Cho, Seongkoo

    2013-12-04T23:59:59.000Z

    with intercalation particles are designed to describe the influence of microstructure on effective electrical conductivity and the electrochemical impedance. The technique of digital stochastic modeling has been employed for the generation of electrode...

  11. Impedance of rigid bodies in one-dimensional elastic collisions

    E-Print Network [OSTI]

    Santos, Janilo; Nelson, Osman Rosso

    2012-01-01T23:59:59.000Z

    In this work we study the problem of one-dimensional elastic collisions of billiard balls, considered as rigid bodies, in a framework very different from the classical one presented in text books. Implementing the notion of impedance matching as a way to understand eficiency of energy transmission in elastic collisions, we find a solution which frames the problem in terms of this conception. We show that the mass of the ball can be seen as a measure of its impedance and verify that the problem of maximum energy transfer in elastic collisions can be thought of as a problem of impedance matching between different media. This approach extends the concept of impedance, usually associated with oscillatory systems, to system of rigid bodies.

  12. Electrochemical Impedance Spectroscopy using adjustable nanometer-gap electrodes

    E-Print Network [OSTI]

    Ma, Hongshen, 1978-

    2007-01-01T23:59:59.000Z

    Electrochemical Impedance Spectroscopy (EIS) is a simple yet powerful chemical analysis technique for measuring the electrical permittivity and conductivity of liquids and gases. Presently, the limiting factor for using ...

  13. Using Surface Impedance for Calculating Wakefields in Flat Geometry

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

    Bane, Karl; Stupakov, Gennady

    2015-03-01T23:59:59.000Z

    Beginning with Maxwell's equations and assuming only that the wall interaction can be approximated by a surface impedance, we derive formulas for the generalized longitudinal and transverse impedance in flat geometry, from which the wakefields can also be obtained. From the generalized impedances, by taking the proper limits, we obtain the normal longitudinal, dipole, and quad impedances in flat geometry. These equations can be applied to any surface impedance, such as the known dc, ac, and anomalous skin models of wall resistance, a model of wall roughness, or one for a pipe with small, periodic corrugations. We show that, formore »the particular case of dc wall resistance, the longitudinal impedance obtained here agrees with a known result in the literature, a result that was derived from a very general formula by Henke and Napoly. As concrete example, we apply our results to representative beam and machine parameters in the undulator region of LCLS-II and estimate the impact of the transverse wakes on the machine performance.« less

  14. Damage detection technique by measuring laser-based mechanical impedance

    SciTech Connect (OSTI)

    Lee, Hyeonseok; Sohn, Hoon [Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology (Daehak-ro 291, Yuseong-gu, Daejeon 305-701) (Korea, Republic of)

    2014-02-18T23:59:59.000Z

    This study proposes a method for measurement of mechanical impedance using noncontact laser ultrasound. The measurement of mechanical impedance has been of great interest in nondestructive testing (NDT) or structural health monitoring (SHM) since mechanical impedance is sensitive even to small-sized structural defects. Conventional impedance measurements, however, have been based on electromechanical impedance (EMI) using contact-type piezoelectric transducers, which show deteriorated performances induced by the effects of a) Curie temperature limitations, b) electromagnetic interference (EMI), c) bonding layers and etc. This study aims to tackle the limitations of conventional EMI measurement by utilizing laser-based mechanical impedance (LMI) measurement. The LMI response, which is equivalent to a steady-state ultrasound response, is generated by shooting the pulse laser beam to the target structure, and is acquired by measuring the out-of-plane velocity using a laser vibrometer. The formation of the LMI response is observed through the thermo-mechanical finite element analysis. The feasibility of applying the LMI technique for damage detection is experimentally verified using a pipe specimen under high temperature environment.

  15. Using Surface Impedance for Calculating Wakefields in Flat Geometry

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

    Bane, Karl; Stupakov, Gennady

    2015-03-01T23:59:59.000Z

    Beginning with Maxwell's equations and assuming only that the wall interaction can be approximated by a surface impedance, we derive formulas for the generalized longitudinal and transverse impedance in flat geometry, from which the wakefields can also be obtained. From the generalized impedances, by taking the proper limits, we obtain the normal longitudinal, dipole, and quad impedances in flat geometry. These equations can be applied to any surface impedance, such as the known dc, ac, and anomalous skin models of wall resistance, a model of wall roughness, or one for a pipe with small, periodic corrugations. We show that, for the particular case of dc wall resistance, the longitudinal impedance obtained here agrees with a known result in the literature, a result that was derived from a very general formula by Henke and Napoly. As concrete example, we apply our results to representative beam and machine parameters in the undulator region of LCLS-II and estimate the impact of the transverse wakes on the machine performance.

  16. Liquid Phase 3D Printing for Quickly Manufacturing Metal Objects with Low Melting Point Alloy Ink

    E-Print Network [OSTI]

    Wang, Lei

    2014-01-01T23:59:59.000Z

    Conventional 3D printings are generally time-consuming and printable metal inks are rather limited. From an alternative way, we proposed a liquid phase 3D printing for quickly making metal objects. Through introducing metal alloys whose melting point is slightly above room temperature as printing inks, several representative structures spanning from one, two and three dimension to more complex patterns were demonstrated to be quickly fabricated. Compared with the air cooling in a conventional 3D printing, the liquid-phase-manufacturing offers a much higher cooling rate and thus significantly improves the speed in fabricating metal objects. This unique strategy also efficiently prevents the liquid metal inks from air oxidation which is hard to avoid otherwise in an ordinary 3D printing. Several key physical factors (like properties of the cooling fluid, injection speed and needle diameter, types and properties of the printing ink, etc.) were disclosed which would evidently affect the printing quality. In addit...

  17. Reducing the influence of microphone errors on in-situ ground impedance measurements

    E-Print Network [OSTI]

    Vormann, Matthias

    Reducing the influence of microphone errors on in- situ ground impedance measurements Roland Kruse. Keywords: Ground impedance; In-situ impedance measurement PACS 43.58.Bh #12;Introduction The acoustical. This problem is not specific to in-situ measurements but also applies to impedance tube measurements [9]. Two

  18. Effect and minimization of errors in in-situ ground impedance measurements

    E-Print Network [OSTI]

    Vormann, Matthias

    Effect and minimization of errors in in-situ ground impedance measurements Roland Kruse, Volker method is a procedure to measure the surface impedance of grounds in-situ. In this article, the influence. #12;Keywords: Ground impedance; In-situ impedance measurement PACS 43.58.Bh Introduction The surface

  19. Application of the two-microphone method for in-situ ground impedance measurements

    E-Print Network [OSTI]

    Vormann, Matthias

    Application of the two-microphone method for in-situ ground impedance measurements Roland Kruse is a convenient and well- known procedure to measure the surface impedance in-situ. Its proposed implementation-processing. Keywords: Ground impedance; In-situ impedance measurement; ANSI S1.18 PACS 43.58.Bh Introduction

  20. A low RF-band impedance spectroscopy based sensor for in-situ, wireless soil sensing

    E-Print Network [OSTI]

    Kumar, Ratnesh

    1 A low RF-band impedance spectroscopy based sensor for in-situ, wireless soil sensing Gunjan of impedance spectroscopy. Impedance measurement at multiple frequencies is done by comparing the amplitude impedance of the board in the measurements to minimize the errors. Measurements of both real and imaginary

  1. Scientists at ALS Find New Path to More Efficient Organic Solar...

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

    Scientists at ALS Find New Path to More Efficient Organic Solar Cells Scientists at ALS Find New Path to More Efficient Organic Solar Cells Print Monday, 07 January 2013 00:00...

  2. Multi-Layer Inkjet Printed Contacts to Si

    SciTech Connect (OSTI)

    Curtis, C. J.; van Hest, M.; Miedaner, A.; Kaydanova, T.; Smith, L.; Ginley, D. S.

    2005-11-01T23:59:59.000Z

    Ag, Cu, and Ni metallizations were inkjet printed with near vacuum deposition quality. The approach developed can be easily extended to other conductors such as Pt, Pd, Au, etc. Thick highly conducting lines of Ag and Cu demonstrating good adhesion to glass, Si, and printed circuit board (PCB) have been printed at 100-200 deg C in air and N2 respectively. Ag grids were inkjet-printed on Si solar cells and fired through the silicon nitride AR layer at 850 deg C, resulting in 8% cells. Next generation inks, including an ink that etches silicon nitride, have now been developed. Multi-layer inkjet printing of the etching ink followed by Ag ink produced contacts under milder conditions and gave solar cells with efficiencies as high as 12%.

  3. Effect of Fuel System Impedance Mismatch on Combustion Dynamics

    SciTech Connect (OSTI)

    Richards, G.A.; Robey, E.H.

    2008-01-01T23:59:59.000Z

    Combustion dynamics are a challenging problem in the design and operation of premixed gas turbine combustors. In premixed combustors, pressure oscillations created by the flame dynamic response can lead to damage. These dynamics are typically controlled by designing the combustor to achieve a stable operation for planned conditions, but dynamics may still occur with minor changes in ambient operating conditions or fuel composition. In these situations, pilot flames or adjustment to fuel flow splits can be used to stabilize the combustor, but often with a compromise in emission performance. As an alternative to purely passive design changes, prior studies have demonstrated that adjustment to the fuel system impedance can be used to stabilize combustion. Prior studies have considered just the response of an individual fuel injector and combustor. However, in practical combustion systems, multiple fuel injectors are used. In this situation, individual injector impedance can be modified to produce a different dynamic response from individual flames. The resulting impedance mismatch prevents all injectors from strongly coupling to the same acoustic mode. In principle, this mismatch should reduce the amplitude of dynamics and may expand the operating margin for stable combustion conditions. In this paper, a 30 kW laboratory combustor with two premixed fuel injectors is used to study the effect of impedance mismatch on combustion stability. The two fuel injectors are equipped with variable geometry resonators that allow a survey of dynamic stability while changing the impedance of the individual fuel systems. Results demonstrate that a wide variation in dynamic response can be achieved by combining different impedance fuel injectors. A base line 7% rms pressure oscillation was reduced to less than 3% by mismatching the fuel impedance.

  4. Low impedance z-pinch drivers without post-hole convolute current adders.

    SciTech Connect (OSTI)

    Savage, Mark Edward; Seidel, David Bruce; Mendel, Clifford Will, Jr.

    2009-09-01T23:59:59.000Z

    Present-day pulsed-power systems operating in the terawatt regime typically use post-hole convolute current adders to operate at sufficiently low impedance. These adders necessarily involve magnetic nulls that connect the positive and negative electrodes. The resultant loss of magnetic insulation results in electron losses in the vicinity of the nulls that can severely limit the efficiency of the delivery of the system's energy to a load. In this report, we describe an alternate transformer-based approach to obtaining low impedance. The transformer consists of coils whose windings are in parallel rather than in series, and does not suffer from the presence of magnetic nulls. By varying the pitch of the coils windings, the current multiplication ratio can be varied, leading to a more versatile driver. The coupling efficiency of the transformer, its behavior in the presence of electron flow, and its mechanical strength are issues that need to be addressed to evaluate the potential of transformer-based current multiplication as a viable alternative to conventional current adder technology.

  5. Interpreting impedance spectra of organic photovoltaic cells—Extracting charge transit and recombination rates

    SciTech Connect (OSTI)

    Mullenbach, Tyler K.; Zou, Yunlong; Holmes, Russell J., E-mail: rholmes@umn.edu [Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Holst, James [New Products R and D, Sigma-Aldrich Corporation, 6000 N. Teutonia Avenue, Milwaukee, Wisconsin 53209 (United States)

    2014-09-28T23:59:59.000Z

    Impedance spectroscopy has been widely used to extract the electron-hole recombination rate constant in organic photovoltaic cells (OPVs). This technique is typically performed on OPVs held at open-circuit. Under these conditions, the analysis is simplified with recombination as the only pathway for the decay of excess charge carriers; transit provides no net change in the charge density. In this work, we generalize the application and interpretation of impedance spectroscopy for bulk heterojunction OPVs at any operating voltage. This, in conjunction with reverse bias external quantum efficiency measurements, permits the extraction of both recombination and transit rate constants. Using this approach, the transit and recombination rate constants are determined for OPVs with a variety of electron donor-acceptor pairings and compositions. It is found that neither rate constant individually is sufficient to characterize the efficiency of charge collection in an OPV. It is demonstrated that a large recombination rate constant can be accompanied by a large transit rate constant, thus fast recombination is not necessarily detrimental to OPV performance. Extracting the transit and recombination rate constants permits a detailed understanding of how OPV architecture and processing conditions impact the transient behavior of charge carriers, elucidating the origin of optimum device configurations.

  6. IMPEDANCE BUDGET FOR CRAB CAVITY IN MEIC ELECTRON RING

    SciTech Connect (OSTI)

    S. Ahmed, B. Yunn, G. Krafft

    2012-07-01T23:59:59.000Z

    The Medium Energy Electron-Ion Collider (MEIC) at Jefferson Lab has been envisioned as a first stage high energy particle accelerator beyond the 12 GeV upgrade of CEBAF. The estimate of impedance budget is important from the view point of beam stability and matching with other accelerator components driving currents. The detailed study of impedance budget for electron ring has been performed by considering the current design parameters of the e-ring. A comprehensive picture of the calculations involved in this study has been illustrated in the paper.

  7. Bendable single crystal silicon thin film transistors formed by printing on plastic substrates

    E-Print Network [OSTI]

    Rogers, John A.

    Bendable single crystal silicon thin film transistors formed by printing on plastic substrates E on plastic substrates using an efficient dry transfer printing technique. In these devices, free standing-Si is then transferred, to a specific location and with a controlled orientation, onto a thin plastic sheet

  8. Inkjet Printing of UWB Antennas on Paper Based , S. Safavi-Naeini1

    E-Print Network [OSTI]

    Tentzeris, Manos

    . This work is one step further towards the development of low-cost environment- friendly conformal printed research topic due to the ever growing demand for low cost, flexible and power-efficient broadband wireless look at the most common techniques for the fabrication of printed UWB antennas reveals

  9. Quadratic Programming and Impedance Control for Transfemoral Prosthesis

    E-Print Network [OSTI]

    Ames, Aaron

    Quadratic Programming and Impedance Control for Transfemoral Prosthesis Huihua Zhao, Shishir of improving both tracking performance and the stability of controllers implemented on transfemoral prosthesis prosthesis is attached to a robotic testbed, AMBER. The authors claim that the walking of AMBER is human like

  10. Electrical Impedance Tomography in geophysics, application of EIDORS

    E-Print Network [OSTI]

    Adler, Andy

    Electrical Impedance Tomography in geophysics, application of EIDORS Lesparre N., Adler A., Gibert to adapt EIDORS for applications in geophysics. In geophysics, we apply EIT in order to image inner. The spatial resolution of the method in geophysics is of the order of meters and the penetration depth can

  11. Variationally Constrained Numerical Solution of Electrical Impedance Tomography

    E-Print Network [OSTI]

    Zhang, Yin

    deposits [77], detection of leaks in underground storage tanks [79] and for monitoring flows of injected the influence of external electric fields [58]. Let us consider a bounded, simply connected set# # IR d , for d the electric field and the electric current at location x # # Electrical Impedance Tomography (EIT

  12. Blood Impedance Characterization from Pulsatile Measurements School of Information Technology

    E-Print Network [OSTI]

    Adler, Andy

    Blood Impedance Characterization from Pulsatile Measurements Tao Dai School of Information of blood excluding the contributions from surround- ing tissues, based on analysis of the pulsatile MHz. The finger is modeled as three parts: arterial blood, surrounding tissues and incremental in

  13. Impedance sensing of flaws in non-homogeneous materials

    DOE Patents [OSTI]

    Novak, J.L.

    1997-02-11T23:59:59.000Z

    An apparatus and method are disclosed for sensing impedances of materials placed in contact therewith. The invention comprises a plurality of drive electrodes and one or more sense electrodes. Both rotating electric fields and differently shaped electric fields are provided for, as are analysis of structure and composition at different orientations and depths. 10 figs.

  14. Integral equations for shape and impedance reconstruction in corrosion detection

    E-Print Network [OSTI]

    Cakoni, Fioralba

    Integral equations for shape and impedance reconstruction in corrosion detection Fioralba Cakoni of the method. 1 Introduction We consider an inverse problem originating from corrosion detection. Let D R2 Angewandte Mathematik, Universität Göttingen, 37083 Göttingen, Germany 1 #12;part c affected by corrosion

  15. Simultaneous reconstruction of shape and impedance in corrosion detection

    E-Print Network [OSTI]

    Cakoni, Fioralba

    Simultaneous reconstruction of shape and impedance in corrosion detection Fioralba Cakoni , Rainer Kress and Christian Schuft Abstract Corrosion detection can be modelled by the Laplace equation an inverse problem that models corrosion detection. Let D R2 be a simply connected bounded domain with piece

  16. Asymmetries in Electrical Impedance Tomography Lung Images Bartlomiej Grychtol1

    E-Print Network [OSTI]

    Adler, Andy

    Asymmetries in Electrical Impedance Tomography Lung Images Bartlomiej Grychtol1 and Andy Adler2 1, it has been used to image the thorax, to monitor the movement of blood and gas in the heart and lungs. One key application of EIT is to determine the distribution of ventilation within the lungs

  17. 3D Printing Electronics

    E-Print Network [OSTI]

    Stryk, Oskar von

    Login Register Home Videos Jobs Games 3D Printing Electronics Design Software Designer Edge for 3D Printing · -- B6 Sigma Labs (ticker SGLB) is not the same company as Sigma Technologies

  18. Non-Contact Printed Aluminum Metallization of Si Photovoltaic Devices: Preprint

    SciTech Connect (OSTI)

    Platt, H. A. S.; van Hest, M. F. A. M.; Li, Y.; Novak, J. P.

    2012-06-01T23:59:59.000Z

    Alternative solution-based techniques such as aerosol jet printing offer the dual benefits of contactless pattern deposition and high material utilization. We have used aerosol jet printing to investigate non-contact printed Al metal ink as a replacement for screen printed Al back contacts on wafer Si solar cells. This particle-based ink can be prepared at high loadings of 60 weight % metal, which enables rapid deposition of 1 - 10 um thick lines. Al lines printed on Si wafers and heated between 550 and 800 degrees C form low resistance contacts suitable for current extraction. The effectiveness of these printed Al back contacts has further been demonstrated by incorporating them into a series of 21 cm2 crystalline Si solar cells that produced a champion power conversion efficiency of 13%.

  19. Study of Influence of Electrode Geometry on Impedance Spectroscopy

    SciTech Connect (OSTI)

    Ahmed, Riaz; Reifsnider, Kenneth L

    2011-01-01T23:59:59.000Z

    Electrochemical Impedance Spectroscopy (EIS) is a powerful and proven tool for analyzing AC impedance response. A conventional three electrode EIS method was used to perform the investigation in the present study. Saturated potassium chloride solution was used as the electrolyte and three different material rods were used as working electrodes. Different configurations of electrode area were exposed to the electrolyte as an active area to investigate electrode geometry effects. Counter to working electrode distance was also altered while keeping the working electrode effective area constant to explore the AC response dependence on the variation of ion travel distance. Some controlled experiments were done to validate the experimental setup and to provide a control condition for comparison with experimental results. A frequency range of 100 mHz to 1 MHz was used for all experiments. In our analysis, we have found a noteworthy influence of electrode geometry on AC impedance response. For all electrodes, impedance decreases with the increase of effective area of the electrolyte. High frequency impedance is not as dependent on geometry as low frequency response. The observed phase shift angle drops in the high frequency region with increased working electrode area, whereas at low frequency the reverse is true. Resistance and capacitive reactance both decrease with an increase of area, but resistance response is more pronounce than reactance. For lower frequencies, small changes in working area produce very distinctive EIS variations. Electrode material as well as geometry was systematically varied in the present study. From these and other studies, we hope to develop a fundamental foundation for understanding specific changes in local geometry in fuel cell (and other) electrodes as a method of designing local morphology for specific performance.

  20. A power line impedance spectrum analyzer using real-time digital signal processing

    E-Print Network [OSTI]

    Margolis, Michael G

    1993-01-01T23:59:59.000Z

    Power distribution system impedance as seen by power converters and other non-linear loads is important for the determination of harmonic current injection and propagation caused by these loads. This thesis presents a real-time power line impedance...

  1. MICROFLUIDIC MICROSYSTEM FOR MAGNETIC SENSING OF NANOPARTICLES WITH GIANT MAGNETO-IMPEDANCE TECHNOLOGY

    E-Print Network [OSTI]

    Boyer, Edmond

    MICROFLUIDIC MICROSYSTEM FOR MAGNETIC SENSING OF NANOPARTICLES WITH GIANT MAGNETO fabricated a microfluidic microsystem integrating a Giant Magneto-Impedance wire sensor that successfully-Impedance (GMI), magnetic sensor, magnetic nanoparticles, microfluidic, microsystem INTRODUCTION Magnetic

  2. Coaxial Wire Impedance Measurements of BPM Buttons for the PEP-II B-FACTORY

    E-Print Network [OSTI]

    Corlett, J.N.

    2011-01-01T23:59:59.000Z

    GHz) Figure 5. 1.5 cm BPM button in HER arc chamber.Wire Impedance Measurements of BPM Buttons for the PEP-lIB-WIRE IMPEDANCE MEASUREMENTS OF BPM BUTTONS FOR THE PEP-II B-

  3. In-situ measurement of ground impedances Von der Fakultt fr Mathematik und Naturwissenschaften der Carl von Ossietzky

    E-Print Network [OSTI]

    Vormann, Matthias

    In-situ measurement of ground impedances Von der Fakultät für Mathematik und Naturwissenschaften .............................................................................................22 Summary: In-situ impedance measurement.Definitions..........................................................................................................................11 VI.Surface impedance measurement methods

  4. A Multi-frequency, Self-Calibrating, In-Situ Soil Sensor with Energy Efficient Wireless Interface

    E-Print Network [OSTI]

    Kumar, Ratnesh

    in a network spread over a large area. The sensor works on the principle of soil impedance measurement. The sensor has the capability to measure impedance at multiple frequencies. This improves accuracy and alsoA Multi-frequency, Self-Calibrating, In-Situ Soil Sensor with Energy Efficient Wireless Interface

  5. On the Modeling of Piezoelectric Wafer Active Sensor Impedance Analysis for Structural Health Monitoring

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    damage assessment, and are considered as a new non-destructive evaluation method. The in-situ impedance of experimental results obtained from previous work. The real part of the measured PWAS impedance presents twoOn the Modeling of Piezoelectric Wafer Active Sensor Impedance Analysis for Structural Health

  6. Two microphone technique for ground impedance measurements: Uncertainties and their reduction

    E-Print Network [OSTI]

    Vormann, Matthias

    is not specific to in-situ measurements but also applies to impedance tube measurements [8]. The common solutionTwo microphone technique for ground impedance measurements: Uncertainties and their reduction-microphone (level difference) method is a well-known procedure for the in-situ determination of surface impedances

  7. Evaluation of an adjoint-based liner impedance eduction J. Primus, E. Piot and F. Simon

    E-Print Network [OSTI]

    Boyer, Edmond

    impedance with grazing flow. Dean [1] introduced an in-situ technique relying on two microphone measurements impedance which minimizes the error between numerical simulations and a set of measured data. The methodEvaluation of an adjoint-based liner impedance eduction technique J. Primus, E. Piot and F. Simon

  8. Analytical Expression for the Impedance Response for a Lithium-Ion Cell

    E-Print Network [OSTI]

    . The electrochemical impedance spectroscopy EIS technique has long been used as a standard tool to estimate fundamental in battery systems.1-4 The interpretation of the impedance spectrum is often based on equivalent circuit-based impedance models for rechargeable battery systems, most of the rigorous models adopt a numerical scheme

  9. A Model-Based Impedance Control Scheme for High-Performance Hydraulic Joints

    E-Print Network [OSTI]

    Papadopoulos, Evangelos

    A Model-Based Impedance Control Scheme for High-Performance Hydraulic Joints Glen Bilodeau1, Greece Abstract Impedance control of a hydraulic servoactuator joint system is discussed in this paper individually. Due to nonlinear properties of hydraulic actuators, impedance control is difficult. The control

  10. Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter

    E-Print Network [OSTI]

    Bak, Claus Leth

    Modeling and Grid impedance Variation Analysis of Parallel Connected Grid Connected Inverter based in the same grid interface conditions by means of impedance-based analysis and modeling. Unlike the single grid connected inverter, it is found that multiple parallel connected inverters and grid impedance can

  11. Inkjet printed electronics using copper nanoparticle ink

    E-Print Network [OSTI]

    Kang, Jin Sung; Kim, Hak Sung; Ryu, Jongeun; Thomas Hahn, H.; Jang, Seonhee; Joung, Jae Woo

    2010-01-01T23:59:59.000Z

    providing printed electronics using copper nanoparticles.0049-3 Inkjet printed electronics using copper nanoparticleand quality of the printed electronics. In this paper, we

  12. Nuclear radiation-warning detector that measures impedance

    DOE Patents [OSTI]

    Savignac, Noel Felix; Gomez, Leo S; Yelton, William Graham; Robinson, Alex; Limmer, Steven

    2013-06-04T23:59:59.000Z

    This invention is a nuclear radiation-warning detector that measures impedance of silver-silver halide on an interdigitated electrode to detect light or radiation comprised of alpha particles, beta particles, gamma rays, X rays, and/or neutrons. The detector is comprised of an interdigitated electrode covered by a layer of silver halide. After exposure to alpha particles, beta particles, X rays, gamma rays, neutron radiation, or light, the silver halide is reduced to silver in the presence of a reducing solution. The change from the high electrical resistance (impedance) of silver halide to the low resistance of silver provides the radiation warning that detected radiation levels exceed a predetermined radiation dose threshold.

  13. Impedance matched joined drill pipe for improved acoustic transmission

    DOE Patents [OSTI]

    Moss, William C. (San Mateo, CA)

    2000-01-01T23:59:59.000Z

    An impedance matched jointed drill pipe for improved acoustic transmission. A passive means and method that maximizes the amplitude and minimize the temporal dispersion of acoustic signals that are sent through a drill string, for use in a measurement while drilling telemetry system. The improvement in signal transmission is accomplished by replacing the standard joints in a drill string with joints constructed of a material that is impedance matched acoustically to the end of the drill pipe to which it is connected. Provides improvement in the measurement while drilling technique which can be utilized for well logging, directional drilling, and drilling dynamics, as well as gamma-ray spectroscopy while drilling post shot boreholes, such as utilized in drilling post shot boreholes.

  14. Towards a graphene-based quantum impedance standard

    SciTech Connect (OSTI)

    Kalmbach, C.-C.; Schurr, J., E-mail: juergen.schurr@ptb.de; Ahlers, F. J.; Müller, A. [Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig (Germany); Novikov, S.; Lebedeva, N. [Department of Micro- and Nanosciences, Aalto University, Micronova, Tietotie 3, 02150 Espoo (Finland); Satrapinski, A. [MIKES, Tekniikantie 1, P.O. Box, 02151 Espoo (Finland)

    2014-08-18T23:59:59.000Z

    Precision measurements of the quantum Hall resistance with alternating current (ac) in the kHz range were performed on epitaxial graphene in order to assess its suitability as a quantum standard of impedance. The quantum Hall plateaus measured with alternating current were found to be flat within one part in 10{sup 7}. This is much better than for plain GaAs quantum Hall devices and shows that the magnetic-flux-dependent capacitive ac losses of the graphene device are less critical. The observed frequency dependence of about ?8?×?10{sup ?8}/kHz is comparable in absolute value to the positive frequency dependence of plain GaAs devices, but the negative sign is attributed to stray capacitances which we believe can be minimized by a careful design of the graphene device. Further improvements thus may lead to a simpler and more user-friendly quantum standard for both resistance and impedance.

  15. Electrochemical impedance spectroscopy system and methods for determining spatial locations of defects

    DOE Patents [OSTI]

    Glenn, David F.; Matthern, Gretchen E.; Propp, W. Alan; Glenn, Anne W.; Shaw, Peter G.

    2006-08-08T23:59:59.000Z

    A method and apparatus for determining spatial locations of defects in a material are described. The method includes providing a plurality of electrodes in contact with a material, applying a sinusoidal voltage to a select number of the electrodes at a predetermined frequency, determining gain and phase angle measurements at other of the electrodes in response to applying the sinusoidal voltage to the select number of electrodes, determining impedance values from the gain and phase angle measurements, computing an impedance spectrum for an area of the material from the determined impedance values, and comparing the computed impedance spectrum with a known impedance spectrum to identify spatial locations of defects in the material.

  16. abnormal resistive zones: Topics by E-print Network

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

    NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE NO PRINTING ZONE Kainen, Paul C. 11 Seismic Amplitude Versus Offset (AVO) Character of Geopressured Transition Zones Geosciences...

  17. The detection of high impedance faults using random fault behavior

    E-Print Network [OSTI]

    Carswell, Patrick Wayne

    1988-01-01T23:59:59.000Z

    In response to an Electric Power Research Institute (EPRI) request for pro- posed solutions for the detection of high impedance faults, the Hughes Aircraft Corporation developed a detection technique based solely on the level of the third harmonic current... for proposed solutions from EPRI that brought the Hughes technique, Power Technologies Incorporated (PTI) proposed a technique which statistically monitors the first, third, and fifth harmonics of current to make a, determination as to the presence of a high...

  18. Impedance spectroscopic characterization of gadolinium substituted cobalt ferrite ceramics

    SciTech Connect (OSTI)

    Rahman, Md. T., E-mail: mrahman5@miners.utep.edu; Ramana, C. V. [Department of Mechanical Engineering, University of Texas at El Paso, El Paso, Texas 79968 (United States)

    2014-10-28T23:59:59.000Z

    Gadolinium (Gd) substituted cobalt ferrites (CoFe{sub 2?x}Gd{sub x}O{sub 4}, referred to CFGO) with variable Gd content (x?=?0.0–0.4) have been synthesized by solid state ceramic method. The crystal structure and impedance properties of CFGO compounds have been evaluated. X-ray diffraction measurements indicate that CFGO crystallize in the inverse spinel phase. The CFGO compounds exhibit lattice expansion due to substitution of larger Gd ions into the crystal lattice. Impedance spectroscopy analysis was performed under a wide range of frequency (f?=?20?Hz–1?MHz) and temperature (T?=?303–573?K). Electrical properties of Gd incorporated Co ferrite ceramics are enhanced compared to pure CoFe{sub 2}O{sub 4} due to the lattice distortion. Impedance spectroscopic analysis illustrates the variation of bulk grain and grain-boundary contributions towards the electrical resistance and capacitance of CFGO materials with temperature. A two-layer heterogeneous model consisting of moderately conducting grain interior (ferrite-phase) regions separated by insulating grain boundaries (resistive-phase) accurately account for the observed temperature and frequency dependent electrical characteristic of CFGO ceramics.

  19. Liquid Phase 3D Printing for Quickly Manufacturing Metal Objects with Low Melting Point Alloy Ink

    E-Print Network [OSTI]

    Lei Wang; Jing Liu

    2014-02-25T23:59:59.000Z

    Conventional 3D printings are generally time-consuming and printable metal inks are rather limited. From an alternative way, we proposed a liquid phase 3D printing for quickly making metal objects. Through introducing metal alloys whose melting point is slightly above room temperature as printing inks, several representative structures spanning from one, two and three dimension to more complex patterns were demonstrated to be quickly fabricated. Compared with the air cooling in a conventional 3D printing, the liquid-phase-manufacturing offers a much higher cooling rate and thus significantly improves the speed in fabricating metal objects. This unique strategy also efficiently prevents the liquid metal inks from air oxidation which is hard to avoid otherwise in an ordinary 3D printing. Several key physical factors (like properties of the cooling fluid, injection speed and needle diameter, types and properties of the printing ink, etc.) were disclosed which would evidently affect the printing quality. In addition, a basic route to make future liquid phase 3D printer incorporated with both syringe pump and needle arrays was also suggested. The liquid phase 3D printing method, which owns potential values not available in a conventional modality, opens an efficient way for quickly making metal objects in the coming time.

  20. Compact organic vapor jet printing print head

    DOE Patents [OSTI]

    Forrest, Stephen R; McGraw, Gregory

    2013-12-24T23:59:59.000Z

    A first device is provided. The first device includes a print head, and a first gas source hermetically sealed to the print head. The print header further includes a first layer comprising a plurality of apertures, each aperture having a smallest dimension of 0.5 to 500 microns. A second layer is bonded to the first layer. The second layer includes a first via in fluid communication with the first gas source and at least one of the apertures. The second layer is made of an insulating material.

  1. Engraving Print Classification

    SciTech Connect (OSTI)

    Hoelck, Daniel [Instituto de Fisica, P. Universidad Catolica de Valparaiso, Av. Brasil 2905, Valparaiso (Chile); Barbe, Joaquim [Grupo Felix Klein, Facultad de Ciencias, Universidad de Santiago de Chile, Av. Lib. Bernardo O'Higgins 3363 (Chile)

    2008-04-15T23:59:59.000Z

    A print is a mark, or drawing, made in or upon a plate, stone, woodblock or other material which is cover with ink and then is press usually into a paper reproducing the image on the paper. Engraving prints usually are image composed of a group of binary lines, specially those are made with relief and intaglio techniques. Varying the number and the orientation of lines, the drawing of the engraving print is conformed. For this reason we propose an application based on image processing methods to classify engraving prints.

  2. Cryogenic Calibration Setup for Broadband Complex Impedance Measurements

    E-Print Network [OSTI]

    Diener, P; Marrache-Kikuchi, C; Aprili, M; Gabelli, J

    2013-01-01T23:59:59.000Z

    Reflection measurements give access to the complex impedance of a material on a wide frequency range. This is of interest to study the dynamical properties of various materials, for instance disordered superconductors. However reflection measurements made at cryogenic temperature suffer from the difficulty to reliably subtract the circuit contribution. Here we report on the design and first tests of a setup able to precisely calibrate in situ the sample reflection, at 4.2 K and up to 2 GHz, by switching and measuring, during the same cool down, the sample and three calibration standards.

  3. Impedance-based study of capacitive porous carbon electrodes with hierarchical and bimodal porosity

    E-Print Network [OSTI]

    Santiago, Juan G.

    hierarchical and bimodal supercapacitor electrodes. First detailed characterization of hierarchical carbon Supercapacitor Capacitive deionization Electrochemical impedance spectroscopy Hierarchical carbon a b s t r a c

  4. Distributed Power Delivery for Energy Efficient and Low Power Systems

    E-Print Network [OSTI]

    Friedman, Eby G.

    Distributed Power Delivery for Energy Efficient and Low Power Systems Selc¸uk K¨ose Department throughout a power distribution system. Due to the parasitic impedances of the power distribution networks current to the load circuits [3]. The complexity of the high performance power delivery systems has

  5. Water Efficiency

    Energy Savers [EERE]

    Water Efficiency Hosted by: FEDERAL UTILITY PARTNERSHIP WORKING GROUP SEMINAR November 5-6, 2014 Cape Canaveral, Florida WATER EFFICIENCY Federal Utility Partnership Working Group...

  6. Evaluation of oilfield corrosion inhibitors by electrochemical impedance spectroscopy (EIS)

    SciTech Connect (OSTI)

    Chen, H.J. [Chevron Petroleum Technology Co., La Habra, CA (United States)

    1994-12-31T23:59:59.000Z

    The performance of commercially available oilfield corrosion inhibitors has been evaluated by electrochemical impedance spectroscopy (EIS) in CO{sub 2} saturated 5% sodium chloride solution. The results demonstrate that EIS is a feasible method for ranking oilfield corrosion inhibitor performance, and the inhibitors exhibit inhibition through different mechanisms. EIS can provide information on the inhibited film growth, and generate the parameters which are specific to a particular corrosion inhibition system. It is found that the high breakpoint frequency at 45{degree} phase angle has excellent correlation with the corrosion rate in the inhibited system. The identification of this correlation is significant because there are advantages associated with measuring this parameter. A patent application has been filed for this discovery.

  7. Using electrical impedance tomography to map subsurface hydraulic conductivity

    DOE Patents [OSTI]

    Berryman, James G. (Danville, CA); Daily, William D. (Livermore, CA); Ramirez, Abelardo L. (Pleasanton, CA); Roberts, Jeffery J. (Livermore, CA)

    2000-01-01T23:59:59.000Z

    The use of Electrical Impedance Tomography (EIT) to map subsurface hydraulic conductivity. EIT can be used to map hydraulic conductivity in the subsurface where measurements of both amplitude and phase are made. Hydraulic conductivity depends on at least two parameters: porosity and a length scale parameter. Electrical Resistance Tomography (ERT) measures and maps electrical conductivity (which can be related to porosity) in three dimensions. By introducing phase measurements along with amplitude, the desired additional measurement of a pertinent length scale can be achieved. Hydraulic conductivity controls the ability to flush unwanted fluid contaminants from the surface. Thus inexpensive maps of hydraulic conductivity would improve planning strategies for subsequent remediation efforts. Fluid permeability is also of importance for oil field exploitation and thus detailed knowledge of fluid permeability distribution in three-dimension (3-D) would be a great boon to petroleum reservoir analysts.

  8. Spatial feature tracking impedence sensor using multiple electric fields

    DOE Patents [OSTI]

    Novak, James L. (Albuquerque, NM)

    1998-01-01T23:59:59.000Z

    Linear and other features on a workpiece are tracked by measuring the fields generated between electrodes arrayed in pairs. One electrode in each pair operates as a transmitter and the other as a receiver, and both electrodes in a pair are arrayed on a carrier. By combining and subtracting fields between electrodes in one pair and between a transmitting electrode in one pair and a receiving electrode in another pair, information describing the location and orientation of the sensor relative to the workpiece in up to six degrees of freedom may be obtained. Typical applications will measure capacitance, but other impedance components may be measured as well. The sensor is designed to track a linear feature axis or a protrusion or pocket in a workpiece. Seams and ridges can be tracked by this non-contact sensor. The sensor output is useful for robotic applications.

  9. Spatial feature tracking impedence sensor using multiple electric fields

    DOE Patents [OSTI]

    Novak, J.L.

    1998-08-11T23:59:59.000Z

    Linear and other features on a workpiece are tracked by measuring the fields generated between electrodes arrayed in pairs. One electrode in each pair operates as a transmitter and the other as a receiver, and both electrodes in a pair are arrayed on a carrier. By combining and subtracting fields between electrodes in one pair and between a transmitting electrode in one pair and a receiving electrode in another pair, information describing the location and orientation of the sensor relative to the workpiece in up to six degrees of freedom may be obtained. Typical applications will measure capacitance, but other impedance components may be measured as well. The sensor is designed to track a linear feature axis or a protrusion or pocket in a workpiece. Seams and ridges can be tracked by this non-contact sensor. The sensor output is useful for robotic applications. 10 figs.

  10. Health Monitoring of Aging Aerospace Structures using the Electro-Mechanical Impedance Method

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    1 Health Monitoring of Aging Aerospace Structures using the Electro- Mechanical Impedance Method-mechanical (E/M) impedance method for health monitoring of aging aerospace structures. As a nondestructive aircraft, health monitoring, statistics, neural networks, 1. INTRODUCTION Structural health monitoring (SHM

  11. Impedance Analysis of Silicon Nanowire Lithium Ion Battery Anodes Riccardo Ruffo,

    E-Print Network [OSTI]

    Cui, Yi

    Impedance Analysis of Silicon Nanowire Lithium Ion Battery Anodes Riccardo Ruffo, Seung Sae Hong as a high-capacity anode in a lithium ion battery. The ac response was measured by using impedance for higher specific energy lithium ion batteries for applications such as electric vehicles, next generation

  12. Estimation of Diffusion Coefficient of Lithium in Carbon Using AC Impedance Technique

    E-Print Network [OSTI]

    in a lithium-ion battery from ac impedance measurement is of great interest to us.1-6 Basically, the impedance are used to esti- mate this parameter. Among the methods developed to estimate Ds of a lithium-ion such as the steady-state lithium-ion concentration, c0 , surface con- centration, cs , of intercalation species

  13. Algorithm Development for Electrochemical Impedance Spectroscopy Diagnostics in PEM Fuel Cells

    E-Print Network [OSTI]

    Victoria, University of

    Algorithm Development for Electrochemical Impedance Spectroscopy Diagnostics in PEM Fuel Cells-board fuel cell diagnostic hardware. Impedance can identify faults that cannot be identified solely by a drop Abstract The purpose of this work is to develop algorithms to identify fuel cell faults using

  14. Impact of Initial Biofilm Growth on the Anode Impedance of Microbial Fuel Cells

    E-Print Network [OSTI]

    Mench, Matthew M.

    . Ramasamy,1 Zhiyong Ren,2 Matthew M. Mench,1 John M. Regan2 1 Fuel Cell Dynamics and Diagnostics LaboratoryARTICLE Impact of Initial Biofilm Growth on the Anode Impedance of Microbial Fuel Cells Ramaraja P: Electrochemical impedance spectroscopy (EIS) was used to study the behavior of a microbial fuel cell (MFC) during

  15. AN IMPLANTABLE ALL-PARYLENE LIQUID-IMPEDANCE BASED MEMS FORCE SENSOR

    E-Print Network [OSTI]

    Meng, Ellis

    . Specifically, in situ and in vivo measurement of interfacial forces exerted on tissue by chronically implantedAN IMPLANTABLE ALL-PARYLENE LIQUID-IMPEDANCE BASED MEMS FORCE SENSOR Christian A. Gutierrez1 ABSTRACT We present a new transducer paradigm based on the electrochemical impedance transduction

  16. Multiple Impedance Control for Object Manipulation S. Ali A. Moosavian1 and Evangelos Papadopoulos2

    E-Print Network [OSTI]

    Papadopoulos, Evangelos

    Multiple Impedance Control for Object Manipulation S. Ali A. Moosavian1 and Evangelos Papadopoulos2- point, but of the manipulated object itself. A combination of feedforwardand feedback controls. Impedance Control was formulated originally to impose a desired behavior on a single manipulator interacting

  17. Electrical impedance tomography and Calderon's Department of Mathematics, University of Washington, Seattle, WA 98195, USA

    E-Print Network [OSTI]

    Uhlmann, Gunther

    Electrical impedance tomography and Calder´on's problem G Uhlmann Department of Mathematics, University of Washington, Seattle, WA 98195, USA E-mail: gunther@math.washington.edu Abstract. We survey mathematical developments in the inverse method of Electrical Impedance Tomography which consists

  18. Fig. 1. Teleoperated slave robot. Optical Torque Sensors for Local Impedance Control

    E-Print Network [OSTI]

    Tachi, Susumu

    Fig. 1. Teleoperated slave robot. Optical Torque Sensors for Local Impedance Control Realization_teterukov@ipc.i.u-tokyo.ac.jp We recently developed an optical torque sensor to replace expensive strain-gauge-based sensor on the anthropomorphic robot arm and realize local impedance control in individual joints. Keywords: Optical torque

  19. On Impedance Spectroscopy Contribution to Failure Diagnosis in Wind Turbine Generators

    E-Print Network [OSTI]

    Boyer, Edmond

    On Impedance Spectroscopy Contribution to Failure Diagnosis in Wind Turbine Generators Mohamed Becherif1 , El Houssin El Bouchikhi2 and Mohamed Benbouzid2 Abstract ­ Wind turbines proliferation turbines. Indeed, impedance spectroscopy is already used for the diagnosis of batteries, fuel cells

  20. Reliability of Bioelectrical Impedance Analysis for Estimating Whole-Fish Energy Density and Percent Lipids

    E-Print Network [OSTI]

    Reliability of Bioelectrical Impedance Analysis for Estimating Whole-Fish Energy Density impedance analysis (BIA) as a nonlethal means of predicting energy density and percent lipids for three fish. Although models that combined BIA measures with fish wet mass provided strong predictions of total energy

  1. Data-driven classification of ventilated lung tissues using electrical impedance tomography

    E-Print Network [OSTI]

    Adler, Andy

    Data-driven classification of ventilated lung tissues using electrical impedance tomography Camille for identifying ventilated lung regions utilizing electrical impedance tomography (EIT) images rely on dividing of a data-driven classification method to identify ventilated lung ROI based on forming k clusters from

  2. Numerical Calculation of Beam Coupling Impedances in the Frequency Domain using FIT

    E-Print Network [OSTI]

    Niedermayer, U

    2012-01-01T23:59:59.000Z

    The transverse impedance of kicker magnets is considered to be one of the main beam instability sources in the projected SIS-100 at FAIR and also in the SPS at CERN. The longitudinal impedance can contribute to the heat load, which is especially a concern in the cold sections of SIS-100 and LHC. In the high frequency range, commercially available time domain codes like CST Particle Studio serve to calculate the impedance but they are inapplicable at medium and low frequencies which become more important for larger size synchrotrons. We present the ongoing work of developing a Finite Integration Technique (FIT) solver in frequency domain which is based on the Parallel and Extensible Toolkit for Scientific computing (PETSc) framework in C++. Proper beam adapted boundary conditions are important to validate the concept. The code is applied to an inductive insert used to compensate the longitudinal space charge impedance in low energy machines. Another application focuses on the impedance contribution of a ferrit...

  3. Content-adaptive lenticular prints

    E-Print Network [OSTI]

    Tompkin, James

    Lenticular prints are a popular medium for producing automultiscopic glasses-free 3D images. The light field emitted by such prints has a fixed spatial and angular resolution. We increase both perceived angular and spatial ...

  4. Idea Generation 3D printing

    E-Print Network [OSTI]

    Papadopouli, Maria

    2012 Idea Generation 3D printing at nanoscale Cruising on electrical roads Pushing back against Centre micro and nanoscale 15 Taking 3D printing to the nanoscale 18 Fighting cancer with a "lab

  5. METHOD, SYSTEM AND COMPUTER-READABLE MEDIA FOR MEASURING IMPEDANCE...

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

    Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and Fuel Cell Hydropower, Wave and Tidal Industrial...

  6. Organic vapor jet printing system

    DOE Patents [OSTI]

    Forrest, Stephen R

    2012-10-23T23:59:59.000Z

    An organic vapor jet printing system includes a pump for increasing the pressure of an organic flux.

  7. Reflectivity Measurements for Copper and Aluminumin the Far Infrared and the Resistive Wall Impedance in the LCLS Undulator

    E-Print Network [OSTI]

    Bane, K L F; Tu, J J

    2006-01-01T23:59:59.000Z

    Reflectivity Measurements for Copper and Aluminumin the Far Infrared and the Resistive Wall Impedance in the LCLS Undulator

  8. A revolutionary concept to improve the efficiency of IC antennas

    SciTech Connect (OSTI)

    Milanesio, D.; Maggiora, R. [Politecnico di Torino, Dipartimento di Elettronica e Telecomunicazioni (DET), Torino (Italy)

    2014-02-12T23:59:59.000Z

    The successful design of an Ion Cyclotron (IC) antenna mainly relies on the capability of coupling high power to the plasma (MW), feature that is currently reached by allowing rather high voltages (tens of kV) on the unavoidable unmatched part of the feeding lines. This requirement is often responsible of arcs along the transmission lines and other unwanted phenomena that considerably limit the usage of IC launchers. In this work, we suggest and describe a revolutionary approach based on high impedance surfaces, which allows to increase the antenna radiation efficiency and, hence, to highly reduce the imposed voltages to couple the same level of power to the plasma. High-impedance surfaces are periodic metallic structures (patches) displaced usually on top of a dielectric substrate and grounded by means of vertical posts usually embedded inside a dielectric, in a mushroom-like shape. In terms of working properties, high impedance surfaces are electrically thin in-phase reflectors, i.e. they present a high impedance, within a given frequency band, such that the image currents are in-phase with the currents of the antenna itself, thus determining a significant efficiency increase. While the usual design of a high impedance surface requires the presence of a dielectric layer, some alternative solutions can be realized in vacuum, taking advantage of double layers ofmetallic patches. After an introductory part on the properties of high impedance surfaces, this work documents both their design by means of numerical codes and their implementation on a scaled mock-up.

  9. A Theory of Impedance Control based on Internal Model Uncertainty Djordje Mitrovic, Stefan Klanke, Adrian Haith and Sethu Vijayakumar

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    and principled theory of impedance control in the nervous system. Here we develop a powerful computational modelA Theory of Impedance Control based on Internal Model Uncertainty Djordje Mitrovic, Stefan Klanke-valid computational model of impedance control derived from first principles have been proposed so far. Many

  10. Recent Advancements in the Electro-Mechanical (E/M) Impedance Method for Structural Health Monitoring and NDE

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    -mechanical impedance technology has high potential for in-situ health monitoring and NDE of structural systems infrastructure specimens under full-scale static testing. A simplified E/M impedance measuring technique1 Recent Advancements in the Electro-Mechanical (E/M) Impedance Method for Structural Health

  11. Real time detection of soil moisture and nitrates using on-board in-situ impedance spectroscopy

    E-Print Network [OSTI]

    Kumar, Ratnesh

    Real time detection of soil moisture and nitrates using on-board in-situ impedance spectroscopy across a pair of electrodes immersed in that medium. We make accurate measurements on soil impedance over multiple frequen- cies using an in-situ soil-sensor we have designed. The impedance values are then used

  12. Part removal of 3D printed parts

    E-Print Network [OSTI]

    Peńa Doll, Mateo

    2014-01-01T23:59:59.000Z

    An experimental study was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D printing using a patent ...

  13. Intense pulsed light sintering of copper nanoink for printed electronics

    E-Print Network [OSTI]

    Kim, Hak-Sung; Dhage, Sanjay R.; Shim, Dong-Eun; Hahn, H. Thomas

    2009-01-01T23:59:59.000Z

    copper nanoink for printed electronics Hak-Sung Kim · Sanjay1 Introduction Printed electronics techniques such as inkjetcomponents of printed electronics are conducting lines and ?

  14. Radio Frequency Surface Impedance Characterization System for Superconducting Samples at 7.5 GHz

    SciTech Connect (OSTI)

    Binping Xiao, Charles Reece, Michael Kelley, Larry Phillips, Rongli Geng, Haipeng Wang, Frank Marhauser

    2011-05-01T23:59:59.000Z

    A radio frequency (RF) surface impedance characterization (SIC) system that uses a sapphire-loaded Nb cavity operating at 7.5 GHz has been fabricated to measure the RF surface impedance of flat superconducting samples. Currently, the SIC system can make direct calorimetric surface impedance measurements in the central 0.8 cm2 area of 5 cm diameter disk samples in a temperature range from 2 to 20 K, exposed to a magnetic flux density of up to 14 mT. As an application, we present the measurement results for a bulk Nb sample.

  15. Improved evaluation of the impedance to simulated seedling emergence caused by rainfall induced crusts

    E-Print Network [OSTI]

    Holder, Cephas Bernard

    1973-01-01T23:59:59.000Z

    of intensities from 1. 3 to 5. 1 cm/hour and durations of 19 to 60 minutes were used to form the crusts. soil surface varied from 207 to 1, 403 J/m 2 The impact energy on the Determinations of crust impedance were made daily for 7 days of drying with a 12... to 2. 5 cm/hour; from 2. 5 to 5. 1 cm/hour the impedance decreased to 1, 851 g force for a 1-hour rainfall duration. The crust impedances, when averaged over 7 days of drying, differed significantly (0. 1% level) between the 1. 3- and 2. 5-cm...

  16. Electrochemical impedance spectroscopy study of nickel-iron deposition. 1: Experimental results

    SciTech Connect (OSTI)

    Baker, B.C.; West, A.C. [Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering, Materials Science, and Mining Engineering

    1997-01-01T23:59:59.000Z

    Results of an electrochemical impedance spectroscopy study of nickel-iron codeposition are presented. Impedance spectra are influenced in a complicated manner by the applied current density, rotation speed, and concentration of ferrous ions. Spectra are particularly sensitive to current density and ferrous-ion concentration. As a basis for comparison, an experimental and theoretical study of nickel deposition from an iron-free bath is presented. It is found that it is the inductive loop of the impedance spectra that changes most dramatically in the presence of ferrous ions.

  17. Force-free black hole jet power from impedance matching

    E-Print Network [OSTI]

    Robert F. Penna

    2015-04-01T23:59:59.000Z

    The standard model of spin-powered black hole jets is the Blandford-Znajek (BZ) model. Unfortunately, the BZ jet power depends on an arbitrary function, $\\Omega_F(\\theta)$, which controls the angular distribution of field line velocities at the horizon. In practice, this function is fixed by finding exact solutions of force-free electrodynamics (FFE) and reading off $\\Omega_F(\\theta)$. We prove that all stationary, axisymmetric solutions of FFE with roughly uniform distributions of field lines at the horizon and at infinity have $\\Omega_F/\\Omega_H\\approx 0.5$, where $\\Omega_H$ is the angular velocity of the horizon. We derive a formula for $\\Omega_F(\\theta)$ that depends only on the angular distribution of field lines at the horizon and at infinity (the full FFE solution is not needed). We give a physical interpretation of our results using the black hole membrane paradigm and a recent extension which treats future null infinity as a resistive membrane. We show that $\\Omega_F/\\Omega_H$ is controlled by impedance matching between the membrane at the horizon and the membrane at infinity. Both membranes have the same surface resistivity, $377 \\Omega$. This universality ultimately explains the universality of $\\Omega_F/\\Omega_H\\approx 0.5$ and fixes the ambiguity in the BZ jet power prediction.

  18. Fuzzy Modeling of Electrical Impedance Tomography Image of the Lungs

    E-Print Network [OSTI]

    Tanaka, Harki; Galizia, Mauricio Stanzione; Sobrinho, Joao Batista Borges; Amato, Marcelo Britto Passos

    2007-01-01T23:59:59.000Z

    Electrical Impedance Tomography (EIT) is a functional imaging method that is being developed for bedside use in critical care medicine. Aiming at improving the chest anatomical resolution of EIT images we developed a fuzzy model based on EIT high temporal resolution and the functional information contained in the pulmonary perfusion and ventilation signals. EIT data from an experimental animal model were collected during normal ventilation and apnea while an injection of hypertonic saline was used as a reference . The fuzzy model was elaborated in three parts: a modeling of the heart, a pulmonary map from ventilation images and, a pulmonary map from perfusion images. Image segmentation was performed using a threshold method and a ventilation/perfusion map was generated. EIT images treated by the fuzzy model were compared with the hypertonic saline injection method and CT-scan images, presenting good results in both qualitative (the image obtained by the model was very similar to that of the CT-scan) and quant...

  19. Pennsylvania Company Develops Solar Cell Printing Technology

    Broader source: Energy.gov [DOE]

    The technology uses Plextronics’ conductive inks that can be printed by manufacturers worldwide to make solar cells, potentially as easily as they might print a newspaper.

  20. Structural Integration of Silicon Solar Cells and Lithium-ion Batteries Using Printed Electronics

    E-Print Network [OSTI]

    Kang, Jin Sung

    2012-01-01T23:59:59.000Z

    4 Inkjet Printed Electronics Using Copper Nanoparticle29 Inkjet Printed Electronics For Multifunctional Compositenanocrystals toward printed electronics,” Nanotechnology,

  1. A malaria diagnostic system based on electric impedance spectroscopy

    E-Print Network [OSTI]

    Ha, Sungjae

    2011-01-01T23:59:59.000Z

    Malaria caused by Plasmodium falciparum infection is one of the major threats to world health and especially to the community without proper medical care. New approach to cost-efficient, portable, miniaturized diagnostic ...

  2. High Efficiency, Low Cost Solar Cells Manufactured Using 'Silicon Ink' on Thin Crystalline Silicon Wafers

    SciTech Connect (OSTI)

    Antoniadis, H.

    2011-03-01T23:59:59.000Z

    Reported are the development and demonstration of a 17% efficient 25mm x 25mm crystalline Silicon solar cell and a 16% efficient 125mm x 125mm crystalline Silicon solar cell, both produced by Ink-jet printing Silicon Ink on a thin crystalline Silicon wafer. To achieve these objectives, processing approaches were developed to print the Silicon Ink in a predetermined pattern to form a high efficiency selective emitter, remove the solvents in the Silicon Ink and fuse the deposited particle Silicon films. Additionally, standard solar cell manufacturing equipment with slightly modified processes were used to complete the fabrication of the Silicon Ink high efficiency solar cells. Also reported are the development and demonstration of a 18.5% efficient 125mm x 125mm monocrystalline Silicon cell, and a 17% efficient 125mm x 125mm multicrystalline Silicon cell, by utilizing high throughput Ink-jet and screen printing technologies. To achieve these objectives, Innovalight developed new high throughput processing tools to print and fuse both p and n type particle Silicon Inks in a predetermined pat-tern applied either on the front or the back of the cell. Additionally, a customized Ink-jet and screen printing systems, coupled with customized substrate handling solution, customized printing algorithms, and a customized ink drying process, in combination with a purchased turn-key line, were used to complete the high efficiency solar cells. This development work delivered a process capable of high volume producing 18.5% efficient crystalline Silicon solar cells and enabled the Innovalight to commercialize its technology by the summer of 2010.

  3. Thermal annealing study on P3HT: PCBM based bulk heterojunction organic solar cells using impedance spectroscopy

    SciTech Connect (OSTI)

    Gollu, Sankara Rao, E-mail: sankar.gollu@gmail.com [Plastic Electronics and Energy Lab (PEEL), Department of Metallurgical Engineering and Material Science, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India); Sharma, Ramakant, E-mail: diptig@iitb.ac.in; G, Srinivas, E-mail: diptig@iitb.ac.in; Gupta, Dipti, E-mail: diptig@iitb.ac.in [Plastic Electronics and Energy Lab (PEEL) Department of Metallurgical Engineering and Material Science, Indian Institute of Technology Bombay, Powai, Mumbai-400076 (India)

    2014-10-15T23:59:59.000Z

    Recently, Thermal annealing is an important process for bulk heterojunction organic solar cells (BHJ OSCs) to improve the device efficiency and performance of the organic solar cells. Here in, we have examined the changes in the efficiency and morphology of P3HT: PCBM film according to the thermal annealing temperature to find the changes during the annealing process by measuring the optical absorption, atomic force microscope and X-ray diffraction. We also investigated the effect of different annealing process conditions (without, pre- and post-annealing) on the device performance of the inverted bulk heterojunction organic solar cells consist the structure of ITO/ ZnO / P3HT: PCBM / MoO{sub 3}/ Al by measuring AC impedance characteristics. Particularly, the power conversion efficiency (PCE), crystalline nature of the polymer, light absorption and the surface smoothness of P3HT: PCBM films are significantly improved after the annealing process. These results indicated the improvement in terms of PCE, interface smoothness between the P3HT: PCBM and MoO{sub 3} layers of the post annealed device originated from the decrease of series resistance between P3HT: PCBM layer and Al electrodes, which could be due to decrease in the effective life time of charge carriers.

  4. Effects of posture and bronchoconstriction on low-frequency input and transfer impedances in humans

    E-Print Network [OSTI]

    Lutchen, Kenneth

    ventilation waveform (OVW) approach, which simultaneously provides ventilation and multifrequency forcing, with optoelectronic plethysmography (OEP) to measure chest wall flow globally and locally. We applied an OVW gas compression and airway walls. Local impedances show that, during bronchocon- striction

  5. An algorithm for faulted phase and feeder selection under high impedance fault conditions 

    E-Print Network [OSTI]

    Benner, Carl Lee

    1988-01-01T23:59:59.000Z

    . One method based on increases in third and fifth harmonic symmetrical current components under high impedance fault conditions has been proposed by Balser et. Journal model is IEEE Transactions on Power Delivery. al, of Power Technologies Inc [1...

  6. Acoustic Modes in Combustors with Complex Impedances and Multidimensional Active Flames

    E-Print Network [OSTI]

    Nicoud, Franck

    Acoustic Modes in Combustors with Complex Impedances and Multidimensional Active Flames F. Nicoud for computing the thermoacoustic modes in combustors. In the case of a nonisothermal reacting medium, the wave

  7. Stable, high-force, low-impedance robotic actuators for human-interactive machines

    E-Print Network [OSTI]

    Buerger, Stephen Paul, 1976-

    2005-01-01T23:59:59.000Z

    Robots that engage in significant physical interaction with humans, such as robotic physical therapy aids, must exhibit desired mechanical endpoint impedance while simultaneously producing large forces. In most practical ...

  8. Impedance spectroscopy as a nondestructive health interrogation tool for lithium-BCX cells

    SciTech Connect (OSTI)

    Popov, B.N.; Zhang, W.; White, R.E. (Univ. of South Carolina, Columbia, SC (United States). Dept.of Chemical Engineering); Darcy, E.C. (Johnson Space Center, Houston, TX (United States))

    1993-11-01T23:59:59.000Z

    The objective of this investigation was to study the growth of thick passivating layers on the Li anode in Li/BCX (Li/SOCL[sub 2] + BrCl) cells which were stored for a period of 3 years. Impedance spectroscopy and equivalent circuit models were used to determine characterizing parameters for these cells. The equivalent circuit used for virgin cells includes a faradic contribution and diffusion of the electroactive species. The equivalent circuit for batteries stored 1 or 2 years includes the impedance of a metal/passive film interface, the resistance of the film, and the impedance of the passivating film/electrolyte interface. The equivalent circuit used for batteries stored for 3 years accounts for cathodic contributions in the overall impedance spectrum.

  9. MEASURES TO REDUCE THE IMPEDANCE OF PARASITIC RESONANT MODES IN THE DANE VACUUM CHAMBER

    E-Print Network [OSTI]

    Istituto Nazionale di Fisica Nucleare (INFN)

    HOM content and reduce the impedance of the remaining HOMs in order to avoid excessive beam power loss harmonics of the beam in order to avoid resonant enhancement of the parasitic power loss. The basic ideas

  10. EIS Studies of Porous Oxygen Electrodes with Discrete I. Impedance of Oxide Catalyst Supports

    E-Print Network [OSTI]

    characteristics of these electrodes.1 Electrochemical impedance spectroscopy EIS is a frequency- domain method in battery systems.8 They modified the classical transmission line model and devised an electrical

  11. Experimental investigation of microwave interaction with magnetoplasma in miniature multipolar configuration using impedance measurements

    SciTech Connect (OSTI)

    Dey, Indranuj, E-mail: indranuj@aees.kyushu-u.ac.jp; Toyoda, Yuji; Yamamoto, Naoji; Nakashima, Hideki [Department of Advanced Energy Engineering Science, Kyushu University, Kasuga 816-8580 (Japan)

    2014-09-15T23:59:59.000Z

    A miniature microwave plasma source employing both radial and axial magnetic fields for plasma confinement has been developed for micro-propulsion applications. Plasma is initiated by launching microwaves via a short monopole antenna to circumvent geometrical cutoff limitations. The amplitude and phase of the forward and reflected microwave power is measured to obtain the complex reflection coefficient from which the equivalent impedance of the plasma source is determined. Effect of critical plasma density condition is reflected in the measurements and provides insight into the working of the miniature plasma source. A basic impedance calculation model is developed to help in understanding the experimental observations. From experiment and theory, it is seen that the equivalent impedance magnitude is controlled by the coaxial discharge boundary conditions, and the phase is influenced primarily by the plasma immersed antenna impedance.

  12. Rapid Impedance Spectrum Measurements for Onboard State-of-Health Applications

    SciTech Connect (OSTI)

    Jon P. Christophersen; John L. Morrison; Chinh D. Ho

    2012-06-01T23:59:59.000Z

    Rapid impedance measurements can provide a useful online tool for improved state-of-health estimation. A validation study has been initiated at the Idaho National Laboratory for a rapid impedance technique known as Harmonic Compensated Synchronous Detection. This technique enables capturing the impedance spectra over a broad frequency range within about ten seconds. Commercially available lithium-ion cells are being calendar-life aged at 50°C with reference performance tests at 30°C every 32.5 days to gauge degradation The cells have completed the first set of reference performance tests and preliminary results are presented. The spectra change as a function of temperature and depth-of-discharge condition, as expected. The data indicate that the rapid impedance measurement technique is a benign measurement tool that can be successfully used to gauge changes in the corresponding pulse resistance.

  13. An experimental analysis of an impedance pump as a model for segmentation in the intestine

    E-Print Network [OSTI]

    Holbrook, Doria M. (Doria Marie Gamache)

    2008-01-01T23:59:59.000Z

    The intestine is a fluid-filled compliant tube that twists, turns, and folds back on itself, potentially causing changes in impedance of the tube. By asymmetrically compressing a compliant tube of physiological geometries ...

  14. Design of a micro-interdigitated electrode for impedance measurement performance in a biochemical assay

    E-Print Network [OSTI]

    Donoghue, Linda (Linda Marie)

    2011-01-01T23:59:59.000Z

    The performance of interdigitated electrodes for impedance measurements is dependent upon the geometric design of the electrode pattern and can be significantly impacted by manufactured variability or defects. For processes ...

  15. Electrical impedance tomography spectroscopy method for characterising particles in solid-liquid phase

    SciTech Connect (OSTI)

    Zhao, Yanlin [Department of Thermal Energy Engineering, College of Mechanical and Transportation Engineering, China University of Petroleum, Beijing, 102249 (China); Wang, Mi [Institute of Particle Science and Engineering, School of Process, Environmental and Materials Engineering, University of Leeds, Leeds LS2 9JT (China); Yao, Jun [School of Energy Research, Xiamen University, Xiamen 361005 (China)

    2014-04-11T23:59:59.000Z

    Electrical impedance tomography (EIT) is one of the process tomography techniques to provide an on-line non-invasive imaging for multiphase flow measurement. With EIT measurements, the images of impedance real part, impedance imaginary part, phase angle, and magnitude can be obtained. However, most of the applications of EIT in the process industries rely on the conductivity difference between two phases in fluids to obtain the concentration profiles. It is not common to use the imaginary part or phase angle due to the dominant change in conductivity or complication in the use of other impedance information. In a solid-liquid two phases system involving nano- or submicro-particles, characterisation of particles (e.g. particle size and concentration) have to rely on the measurement of impedance phase angle or imaginary part. Particles in a solution usually have an electrical double layer associated with their surfaces and can form an induced electrical dipole moment due to the polarization of the electrical double layer under the influence of an alternating electric field. Similar to EIT, electrical impedance spectroscopy (EIS) measurement can record the electrical impedance data, including impedance real part, imaginary part and phase angle (?), which are caused by the polarization of the electrical double layer. These impedance data are related to the particle characteristics e.g. particle size, particle and ionic concentrations in the aqueous medium, therefore EIS method provides a capability for characterising the particles in suspensions. Electrical impedance tomography based on EIS measurement or namely, electrical impedance tomography spectroscopy (EITS) could image the spatial distribution of particle characteristics. In this paper, a new method, including test set-up and data analysis, for characterisation of particles in suspensions are developed through the experimental approach. The experimental results on tomographic imaging of colloidal particles based on EIS measurement using a sensor of 8 electrodes are reported. Results have demonstrated the potential as well as revealed the challenge in the use of EIS and EITS for characterisation of particle in suspension.

  16. Determination of delaminated area of coated steel using electrochemical impedance spectroscopy

    E-Print Network [OSTI]

    Alwohaibi, Mohammed Abdullaziz

    1992-01-01T23:59:59.000Z

    DETERMINATION OF DELAMINATED AREA OF COATED STEEL USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY A Thesis by MOHAMMED ABDULLAZIZ ALWOHAIBI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE December 1992 Major Subject: Chemical Engineering DETERMINATION OF DELAMINATED AREA OF COATED STEEL USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY A Thesis by MOHAMMED ABDULLAZIZ ALWOHAIBI Appmved...

  17. A PARAMETRIC STUDY OF BCS RF SURFACE IMPEDANCE WITH MAGNETIC FIELD USING THE XIAO CODE

    SciTech Connect (OSTI)

    Reece, Charles E. [JLAB; Xiao, Binping [JLAB, BNL

    2013-09-01T23:59:59.000Z

    A recent new analysis of field-dependent BCS rf surface impedance based on moving Cooper pairs has been presented.[1] Using this analysis coded in Mathematica TM, survey calculations have been completed which examine the sensitivities of this surface impedance to variation of the BCS material parameters and temperature. The results present a refined description of the "best theoretical" performance available to potential applications with corresponding materials.

  18. Determination of delaminated area of coated steel using electrochemical impedance spectroscopy 

    E-Print Network [OSTI]

    Alwohaibi, Mohammed Abdullaziz

    1992-01-01T23:59:59.000Z

    DETERMINATION OF DELAMINATED AREA OF COATED STEEL USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY A Thesis by MOHAMMED ABDULLAZIZ ALWOHAIBI Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE December 1992 Major Subject: Chemical Engineering DETERMINATION OF DELAMINATED AREA OF COATED STEEL USING ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY A Thesis by MOHAMMED ABDULLAZIZ ALWOHAIBI Appmved...

  19. Investigating the low-temperature impedance increase of lithium-ion cells.

    SciTech Connect (OSTI)

    Abraham, D. P.; Heaton, J. R.; Kang, S.-H.; Dees, D. W.; Jansen, A. N.; Chemical Engineering

    2008-01-01T23:59:59.000Z

    Low-temperature performance loss is a significant barrier to commercialization of lithium-ion cells in hybrid electric vehicles. Increased impedance, especially at temperatures below 0 C, reduces the cell pulse power performance required for cold engine starts, quick acceleration, or regenerative braking. Here we detail electrochemical impedance spectroscopy data on binder- and carbon-free layered-oxide and spinel-oxide electrodes, obtained over the +30 to ?30 C temperature range, in coin cells containing a lithium-preloaded Li{sub 4/3}Ti{sub 5/3}O{sub 4} composite (LTOc) counter electrode and a LiPF{sub 6}-bearing ethylene carbonate/ethyl methyl carbonate electrolyte. For all electrodes studied, the impedance increased with decreasing cell temperature; the increases observed in the midfrequency arc dwarfed the increases in ohmic resistance and diffusional impedance. Our data suggest that the movement of lithium ions across the electrochemical interface on the active material may have been increasingly hindered at lower temperatures, especially below 0 C. Low-temperature performance may be improved by modifying the electrolyte-active material interface (for example, through electrolyte composition changes). Increasing surface area of active particles (for example, through nanoparticle use) can lower the initial electrode impedance and lead to lower cell impedances at -30 C.

  20. E-print Network: Research Communications for Scientists and Engineers

    Office of Scientific and Technical Information (OSTI)

    E-print Web Log E-print Network E-print Network About Search Browse by Discipline Find Scientific Societies Receive E-print Alerts Contact Us Help Home Site Map OSTI DOE For...

  1. 3D Printing Prof. Hank Dietz

    E-Print Network [OSTI]

    Dietz, Henry G. "Hank"

    3D Printing Prof. Hank Dietz TCMS, March 14, 2014 University of Kentucky Electrical & Computer #12;3D With Glue Layers of paper: printed with glue & cut Layers of powder: printed with glue Can also be printed in full color #12;3D Extrusion (RepRaps) FDM: Fused Deposition Modeling FFF: Fused

  2. This document is produced by the University Print Management Team

    E-Print Network [OSTI]

    Li, Yi

    University Print Management Team. A Guide To Best Practice Printing #12;This document is produced by the University Print Management Team (UPMT) to raise awareness of printing on campus, and to demonstrate how we managing the print process to reduce cost, waste and to improve the functionality and availability of print

  3. alteration print gap: Topics by E-print Network

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

    Elihu, David Morad 2006-01-01 2 Bridging the Gap: Automated Steady Scaffoldings for 3D Printing Jrmie Dumas Computer Technologies and Information Sciences Websites Summary:...

  4. Print http://us.mg4.mail.yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency

    E-Print Network [OSTI]

    .yahoo.com/neo/launch?.rand=deOsgk04ks40i Subject: RE: [s-w-h] b Solar verses wind efficiency From: Michael Klemen (wind4energy, there is a link to IEC testing data. In this document: http://www.dyocore.com/materiaI/IEC_Standard_61400-Sol than doubled energy output. Instead, there's just a 36% improvement in output for a 117% increase

  5. Electrochemical and impedance investigation of the effect of lithium malonate on the performance of natural graphite electrodes in lithium-ion batteries

    SciTech Connect (OSTI)

    Sun, Xiao-Guang [ORNL; Dai, Sheng [ORNL

    2010-01-01T23:59:59.000Z

    Lithium malonate (LM) was coated on the surface of a natural graphite (NG) electrode, which was then tested as the negative electrode in the electrolytes of 0.9 M LiPF6/EC-PC-DMC (1/1/3, by weight) and 1.0 M LiBF4/EC-PC-DMC (1/1/3, by weight) under a current density of 0.075 mA cm-2. LM was also used as an additive to the electrolyte of 1.0 M LiPF6/EC-DMC-DEC (1/1/1, by volume) and tested on a bare graphite electrode. It was found that both the surface coating and the additive approach were effective in improving first charge discharge capacity and coulomb efficiency. Electrochemical impedance spectra showed that the decreased interfacial impedance was coupled with improved coulomb efficiency of the cells using coated graphite electrodes. Cyclic voltammograms (CVs) on fresh bare and coated natural graphite electrodes confirmed that all the improvement in the half-cell performance was due to the suppression of the solvent decomposition through the surface modification with LM. The CV data also showed that the carbonate electrolyte with LM as the additive was not stable against oxidation, which resulted in lower capacity of the full cell with commercial graphite and LiCoO2 electrodes.

  6. Study of benzotriazole as corrosion inhibitors of carbon steel in chloride solution containing hydrogen sulfide using electrochemical impedance spectroscopy (EIS)

    SciTech Connect (OSTI)

    Solehudin, Agus, E-mail: asolehudin@upi.edu [Department of Mechanical Engineering Education, Indonesia University of Education (UPI), Bandung, West Java (Indonesia); Nurdin, Isdiriayani [Department of Chemical Engineering, Bandung Institute of Technology, Bandung, West Java (Indonesia)

    2014-03-24T23:59:59.000Z

    Corrosion and inhibition studies on API 5LX65 carbon steel in chloride solution containing various concentrations of benzotriazole has been conducted at temperature of 70°C using Electrochemical Impedance Spectroscopy (EIS). Corroded carbon steel surface with and without inhibitor have been observed using X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Energy Dispersive Spectroscopy (EDS). The objectives of this research are to study the performance of benzotriazole as corrosion inhibitors. The experimental results of carbon steel corrosion in 3.5% NaCl solution containing 500 mg/l H{sub 2}S at different BTAH concentrations showed that corrosion rate of carbon steel decreases with increasing of BTAH concentrations from 0 to 10 mmol/l. The inhibition efficiency of BTAH was found to be affected by its concentration. The optimum efficiency obtained of BTAH is 93% at concentration of 5 mmol/l. The result of XRD and EDS analysis reveal the iron sulfide (FeS) formation on corroded carbon steel surface without inhibitor. The EDS spectrum show the Nitrogen (N) bond on carbon steel surface inhibited by BTAH.

  7. Integrated Regulation for Energy-Efficient Digital Circuits and Mark Horowitz2

    E-Print Network [OSTI]

    Alon, Elad

    Integrated Regulation for Energy-Efficient Digital Circuits Elad Alon1 and Mark Horowitz2 1 regulation can reduce the effective supply impedance of digital circuits without increasing their total power dissipation. This can be achieved with a push-pull regulator topology that uses a second, higher- than

  8. INTERNSHIP AGREEMENT (Please Print)

    E-Print Network [OSTI]

    Bogaerts, Steven

    Rev. 5/12 INTERNSHIP AGREEMENT (Please Print) STUDENT MUST HAVE A GPA OF 2.0+ AND A MINIMUM OF 64 COMPLETED CREDIT HOURS TO REGISTER FOR AN INTERNSHIP. ALL INTERNSHIPS DONE FOR CREDIT ARE PASS/FAIL. A MAXIMUM OF 10 SEMESTER HOURS OF INTERNSHIP CREDIT IS POSSIBLE. THROUGH A COMBINATION OF INTERNSHIPS

  9. 220 Index MTL ANNUAL RESEARCH REPORT 2014 3D printing 53

    E-Print Network [OSTI]

    Reif, Rafael

    220 Index MTL ANNUAL RESEARCH REPORT 2014 Index Symbols 3D 33 3D printing 53 Integrated circuits 13 Electrospinning 58 Electrospray 60 Electrostatic speakers 49 Endoscopy 132 Energy 79, 87 Efficiency 16 Energy Frontier Research Center for Excitonics 117, 210 Energy harvesting 85 Englund, Dirk R. vi, 117, 180 Erbium

  10. Photosynthesis Research 52: 175185, 1997. c 1997 Kluwer Academic Publishers. Printed in the Netherlands.

    E-Print Network [OSTI]

    Govindjee "Gov"

    Photosynthesis Research 52: 175­185, 1997. c 1997 Kluwer Academic Publishers. Printed in the Netherlands. Historical corner Carotenoid-sensitized photosynthesis: Quantum efficiency, fluorescence of photosynthesis in a diatom was almost the same whether incident light was absorbed by chlorophyll

  11. Printed in the United States of America. Available from National Technical Information Service

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    #12;Printed in the United States of America. Available from National Technical Information Service ......................... 20 4.3 Map-Based Compressor Model ........................... 23 4.4 Loss and Efficiency Performance ........................... 56 6.6 Fan Motor and Compressor Shell Heat Losses ........... 64 7

  12. Application of stochastic Galerkin FEM to the complete electrode model of electrical impedance tomography

    SciTech Connect (OSTI)

    Leinonen, Matti, E-mail: matti.leinonen@aalto.fi; Hakula, Harri, E-mail: harri.hakula@aalto.fi; Hyvönen, Nuutti, E-mail: nuutti.hyvonen@aalto.fi

    2014-07-15T23:59:59.000Z

    The aim of electrical impedance tomography is to determine the internal conductivity distribution of some physical body from boundary measurements of current and voltage. The most accurate forward model for impedance tomography is the complete electrode model, which consists of the conductivity equation coupled with boundary conditions that take into account the electrode shapes and the contact resistances at the corresponding interfaces. If the reconstruction task of impedance tomography is recast as a Bayesian inference problem, it is essential to be able to solve the complete electrode model forward problem with the conductivity and the contact resistances treated as a random field and random variables, respectively. In this work, we apply a stochastic Galerkin finite element method to the ensuing elliptic stochastic boundary value problem and compare the results with Monte Carlo simulations.

  13. Analysis of Conductor Impedances Accounting for Skin Effect and Nonlinear Permeability

    SciTech Connect (OSTI)

    Perkins, M P; Ong, M M; Brown, C G; Speer, R D

    2011-07-20T23:59:59.000Z

    It is often necessary to protect sensitive electrical equipment from pulsed electric and magnetic fields. To accomplish this electromagnetic shielding structures similar to Faraday Cages are often implemented. If the equipment is inside a facility that has been reinforced with rebar, the rebar can be used as part of a lighting protection system. Unfortunately, such shields are not perfect and allow electromagnetic fields to be created inside due to discontinuities in the structure, penetrations, and finite conductivity of the shield. In order to perform an analysis of such a structure it is important to first determine the effect of the finite impedance of the conductors used in the shield. In this paper we will discuss the impedances of different cylindrical conductors in the time domain. For a time varying pulse the currents created in the conductor will have different spectral components, which will affect the current density due to skin effects. Many construction materials use iron and different types of steels that have a nonlinear permeability. The nonlinear material can have an effect on the impedance of the conductor depending on the B-H curve. Although closed form solutions exist for the impedances of cylindrical conductors made of linear materials, computational techniques are needed for nonlinear materials. Simulations of such impedances are often technically challenging due to the need for a computational mesh to be able to resolve the skin depths for the different spectral components in the pulse. The results of such simulations in the time domain will be shown and used to determine the impedances of cylindrical conductors for lightning current pulses that have low frequency content.

  14. A comparison of two energy efficient motors

    SciTech Connect (OSTI)

    Kueck, J.D.; Casada, D.A.; Otaduy, P.J. [Oak Ridge National Lab., TN (United States)

    1998-06-01T23:59:59.000Z

    Limited testing provides evidence that a particular energy efficient motor (EEM) appears to have a unique susceptibility to reduced negative sequence impedance. The effect of the reduction in negative sequence impedance is to allow a higher negative sequence current flow under conditions of voltage unbalance or negative sequence harmonic distortion in the bus voltage. This higher current flow results in additional heating of the rotor and 120 Hz vibration, and may combine with other conditions to cause premature failure. In addition, energy efficient motors operate at slightly higher speeds, and may sometimes cause the driven loads to require more horsepower from the motor causing further overheating. Existing industry guidance for the application of three phase motors in poor power quality environments may be inadequate because this guidance does not consider the combined effect of such conditions as voltage unbalance, harmonic distortion and over voltage. A specific application of an EEM is studied in this paper; the motor may be failing due to a combination of over voltage, voltage unbalance, harmonic distortion and loading the motor to full rated load, while the motor has a Service Factor of 1.0.

  15. COUPLING IMPEDANCE OF CESR-B RF CAVITY FOR THE NSLS-II STORAGE RING.

    SciTech Connect (OSTI)

    BLEDNYKH,A.; KRINSKY, S.; ROSE, J.

    2007-06-25T23:59:59.000Z

    CESR-B type superconducting cavities are under consideration for acceleration of the electron beam in the 3GeV NSLS-II storage ring. In this paper we present detailed investigation of longitudinal and transverse impedance of CESR-B cavity and transitions. Ferrite material is included in impedance analysis. Its effect on short range wake potential has been studied using GdfidL code. The summary results of loss factors and kick factors are presented for a 3mm rms bunch length.

  16. Efficiency Exchange Conference Highlights Energy Efficiency Innovation...

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

    Efficiency Exchange Conference Highlights Energy Efficiency Innovations and Trends Northwest electric power industry connects on the latest energy efficiency programs and...

  17. Efficiency Exchange highlights energy efficiency innovations...

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

    Efficiency Exchange highlights energy efficiency innovations and trends Northwest electric power industry connects on the latest energy efficiency programs and strategies Portland,...

  18. Energy efficiency opportunities in China. Industrial equipment and small cogeneration

    SciTech Connect (OSTI)

    NONE

    1995-02-01T23:59:59.000Z

    A quick glance at comparative statistics on energy consumption per unit of industrial output reveals that China is one of the least energy efficient countries in the world. Energy waste not only impedes economic growth, but also creates pollution that threatens human health, regional ecosystems, and the global climate. China`s decision to pursue economic reform and encourage technology transfer from developed countries has created a window of opportunity for significant advances in energy efficiency. Policy changes, technical training, public education, and financing can help China realize its energy conservation potential.

  19. alexandra hahn marit: Topics by E-print Network

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

    of the network analyzer, 0R . Consequently a matching network, such as an impedance transformer, needs Longitudinal Coupling Impedance of the SNS rf Cavity 12;Longitudinal...

  20. album chart top: Topics by E-print Network

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

    7 telescope 8 2.1 Avoiding duplication of work As parts Lin, Dekang 16 Impedance Transformers and Smith chart Engineering Websites Summary: Impedance Transformers and Smith...

  1. Printed Optics: 3D Printing of Embedded Optical Elements for Interactive Devices

    E-Print Network [OSTI]

    Poupyrev, Ivan

    Printed Optics: 3D Printing of Embedded Optical Elements for Interactive Devices Karl D.D. Willis1 d Figure 1: Custom optical elements are fabricated with 3D printing and embedded in interactive), and embedded optoelectronics (d). ABSTRACT We present an approach to 3D printing custom optical ele- ments

  2. Impedance Matching Wilkinson Power Dividers in 0.35m SiGe BiCMOS Technology

    E-Print Network [OSTI]

    Yanikoglu, Berrin

    1 Impedance Matching Wilkinson Power Dividers in 0.35µm SiGe BiCMOS Technology Ercan Kaymaksut miniature Impedance Matching Wilkinson Power Divider circuits in 0.35µm SiGe BiCMOS technology for on

  3. Persistent photoexcitation effect on the poly(3-hexylthiophene) film: Impedance measurement and modeling

    E-Print Network [OSTI]

    Boyer, Edmond

    Persistent photoexcitation effect on the poly(3-hexylthiophene) film: Impedance measurement, or photovoltaic cells. A large number of organic semiconductors have been investigated in order to achieve optimum in photovoltaic cells [2, 3] or photodetec- tors [4, 5]. In spite of remarkable improvements of the P3HT-based de

  4. ACOUSTIC IMPEDANCE INVERSION FOR STATIC AND DYNAMIC CHARACTERIZATION OF A CO2 EOR PROJECT,

    E-Print Network [OSTI]

    ACOUSTIC IMPEDANCE INVERSION FOR STATIC AND DYNAMIC CHARACTERIZATION OF A CO2 EOR PROJECT, POSTLE of the CO2 flood performance at Postle field. The use of traditional P-wave reflectivity data correlate to the roll-out of the CO2 flood program from south to north. When interpreted in conjunction

  5. A Cooperated-Robot Arm Used for Rehabilitation Treatment with Hybrid Impedance Control Method

    E-Print Network [OSTI]

    Li, Yangmin

    A Cooperated-Robot Arm Used for Rehabilitation Treatment with Hybrid Impedance Control Method limbs or lower limbs function. Nowadays, most two-DOF(degree of free- dom) robotic arms are applied. In this paper, a three-DOF planar robotic arm is used as a rehabilitation treatment tool for the survivor after

  6. An Online Trajectory Generator-Based Impedance Control For Co-manipulation Tasks

    E-Print Network [OSTI]

    An Online Trajectory Generator-Based Impedance Control For Co-manipulation Tasks Authors: Sarra the problem of heavy load co-manipulation in the context of physical human-robot interactions (PHRI). During problem for handling tasks as a constrained optimal control problem. For this purpose, we have designed

  7. Mechanical impedance and CPX noise of SMA V.F. Vazquez and S.E. Paje

    E-Print Network [OSTI]

    Boyer, Edmond

    to the volume population affected, are transportation systems like motor vehicles. Tire road noise is the noiseMechanical impedance and CPX noise of SMA pavements V.F. V´azquez and S.E. Paje UCLM-LA2IC, Av 2012 Nantes Conference 23-27 April 2012, Nantes, France 167 #12;CPX noise is the sound measured

  8. DAMAGE IDENTIFICATION IN A STEEL FRAME USING HIGH-FREQUENCY ELECTRO-MECHANICAL IMPEDANCE

    E-Print Network [OSTI]

    Wang, Ji

    411 DAMAGE IDENTIFICATION IN A STEEL FRAME USING HIGH-FREQUENCY ELECTRO-MECHANICAL IMPEDANCE presents an experimental investigation of damage detection of a steel frame using electro damage in structures. Damages are introduced by completely loosening bolts over several locations

  9. Changes in Acoustic Impedance of Marine Sediment Covered with Liquid Henning Harms, Wlner Matuschek, Volker Mellert

    E-Print Network [OSTI]

    Vormann, Matthias

    ) with different densities and sound speeds as a function of grazing angle. The measurements clearly show of the liqui~, TABLE1, Sound speed and density of the chemicals wed in the experiments. substance lChanges in Acoustic Impedance of Marine Sediment Covered with Liquid Pollutants Henning Harms

  10. An Analysis of Mn-Zn Ferrite Microstructure by Impedance Spectroscopy, STEM and EDS Characterisations.

    E-Print Network [OSTI]

    Boyer, Edmond

    An Analysis of Mn-Zn Ferrite Microstructure by Impedance Spectroscopy, STEM and EDS.loyau@satie.ens-cachan.fr Abstract AC resistivity measurement results on Mn-Zn sintered ferrite were analyzed in the 0.1-500 MHz of the main limitations in frequency increase is the energy dissipations by losses in ferrites that produce

  11. Do free-of-charge public health services impede cost recovery policies in Khartoum state, Sudan?

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Do free-of-charge public health services impede cost recovery policies in Khartoum state, Sudan? K about Sudan and the similarity of conditions in sub-Saharan Africa, the authors support this study using background from the experiences of other developing countries). Sudan, like other developing countries, has

  12. Impedance Spectroscopy Failure Diagnosis of a DFIG-Based Wind Turbine

    E-Print Network [OSTI]

    Brest, Université de

    Impedance Spectroscopy Failure Diagnosis of a DFIG-Based Wind Turbine Mohamed Becherif, Assia Henni, Mohamed Benbouzid and Maxime Wack Abstract-Wind turbines proliferation in industrial and residential of the grounding connection, short circuit and stator resistance variation. Index Terms-Wind turbine, doubly

  13. Impedance measurements of ex vivo rat lung at different volumes of inflation

    E-Print Network [OSTI]

    Illinois at Urbana-Champaign, University of

    Impedance measurements of ex vivo rat lung at different volumes of inflation Michael L. Oelze that the occurrence of ultrasonically induced lung hemorrhage in rats was directly correlated to the level of lung inflation. In that study, it was hypothesized that the lung could be modeled as two components consisting

  14. UNIVERSAL AUTO-CALIBRATION FOR A RAPID BATTERY IMPEDANCE SPECTRUM MEASUREMENT DEVICE

    SciTech Connect (OSTI)

    Jon P. Christophersen; John L. Morrison; William H. Morrison

    2014-03-01T23:59:59.000Z

    Electrochemical impedance spectroscopy has been shown to be a valuable tool for diagnostics and prognostics of energy storage devices such as batteries and ultra-capacitors. Although measurements have been typically confined to laboratory environments, rapid impedance spectrum measurement techniques have been developed for on-line, embedded applications as well. The prototype hardware for the rapid technique has been validated using lithium-ion batteries, but issues with calibration had also been identified. A new, universal automatic calibration technique was developed to address the identified issues while also enabling a more simplified approach. A single, broad-frequency range is used to calibrate the system and then scaled to the actual range and conditions used when measuring a device under test. The range used for calibration must be broad relative to the expected measurement conditions for the scaling to be successful. Validation studies were performed by comparing the universal calibration approach with data acquired from targeted calibration ranges based on the expected range of performance for the device under test. First, a mid-level shunt range was used for calibration and used to measure devices with lower and higher impedance. Next, a high excitation current level was used for calibration, followed by measurements using lower currents. Finally, calibration was performed over a wide frequency range and used to measure test articles with a lower set of frequencies. In all cases, the universal calibration approach compared very well with results acquired following a targeted calibration. Additionally, the shunts used for the automated calibration technique were successfully characterized such that the rapid impedance measurements compare very well with laboratory-scale measurements. These data indicate that the universal approach can be successfully used for onboard rapid impedance spectra measurements for a broad set of test devices and range of measurement conditions.

  15. Processing a printed wiring board by single bath electrodeposition

    DOE Patents [OSTI]

    Meltzer, Michael P. (Oakland, CA); Steffani, Christopher P. (Livermore, CA); Gonfiotti, Ray A. (Livermore, CA)

    2010-12-07T23:59:59.000Z

    A method of processing a printed wiring board. Initial processing steps are implemented on the printed wiring board. Copper is plated on the printed wiring board from a bath containing nickel and copper. Nickel is plated on the printed wiring board from a bath containing nickel and copper and final processing steps are implemented on the printed wiring board.

  16. Processing A Printed Wiring Board By Single Bath Electrodeposition

    DOE Patents [OSTI]

    Meltzer, Michael P. (Oakland, CA); Steffani, Christopher P. (Livermore, CA); Gonfiotti, Ray A. (Livermore, CA)

    2003-04-15T23:59:59.000Z

    A method of processing a printed wiring board by single bath electrodeposition. Initial processing steps are implemented on the printed wiring board. Copper is plated on the printed wiring board from a bath containing nickel and copper. Nickel is plated on the printed wiring board from the bath containing nickel and copper and final processing steps are implemented on the printed wiring board.

  17. The Makerbot: Desktop 3D printing

    E-Print Network [OSTI]

    Roughan, Matthew

    The Makerbot: Desktop 3D printing Matthew Roughan School of Mathematical Sciences matthew is Lots of maths hidden in something like 3D printing Geometry and Linear algebra ++ Same math used

  18. MPRINT: VAX printing made simple

    SciTech Connect (OSTI)

    Worlton, T.

    1994-08-01T23:59:59.000Z

    Users with stand-alone personal computers and personal printers usually find printing simple, but on a VAX computer or VAX cluster there may be many printers of different types located in different areas. The print queues set up for these printers may require different form qualifiers and may not all be able to print all documents. This article describes the basic steps a VAX system manager should take in setting up and managing print queues on a VAX and tells how to access these queues from a VAX, Unix, Macintosh, or DOS Computer. It gives a basic overview, but includes several helpful items that are obscure or completely undocumented. Following this overview, there is a description of a Fortran program, MPRINT, written to simplify printing for users. The MPRINT program simplifies the choice of printers and print forms for users of VAX print queues by allowing them to select from a one line per queue menu. The menu includes queue descriptions and only lists printers which can correctly print the specified file. MPRINT selects the correct form to use based on file type and maximum record length of the file. MPRINT may be useful at your site, and provides examples of a number of system services. MPRINT includes routines to do a user open of a file and get information from the File and Record Access Blocks (FAB and RAB), and a routine to obtain information about print queues. There are also routines to parse a file name, detab a character buffer, and trim trailing nulls and blanks from a character string.

  19. A revolutionary concept to improve the efficiency of ion cyclotron antennas

    SciTech Connect (OSTI)

    Milanesio, D., E-mail: daniele.milanesio@polito.it; Maggiora, R., E-mail: riccardo.maggiora@polito.it [Politecnico di Torino, Dipartimento di Elettronica e Telecomunicazioni (DET), Torino (Italy)

    2014-06-15T23:59:59.000Z

    The successful design of an ion cyclotron (IC) antenna mainly relies on the capability of coupling high power to the plasma (MW), feature that is currently reached by allowing rather high voltages (tens of kV) on the unavoidable unmatched part of the feeding lines. This requirement is often responsible of arcs along the transmission lines and other unwanted phenomena, such as rectification discharges or hotspots, that considerably limit the usage of IC launchers. In this work, we suggest and describe a revolutionary approach based on high impedance surfaces, which allows to increase the antenna radiation efficiency and, hence, to highly reduce the imposed voltages to couple the same level of power to the plasma. High-impedance surfaces are periodic metallic structures (patches) displaced usually on top of a dielectric substrate and grounded by means of vertical posts usually embedded inside a dielectric, in a mushroom-like shape. In terms of working properties, high impedance surfaces are electrically thin in-phase reflectors, i.e., they present a high impedance, within a given frequency band, such that the image currents are in-phase with the currents of the antenna itself, thus determining a significant efficiency increase. While the usual design of a high impedance surface requires the presence of a dielectric layer, some alternative solutions can be realised in vacuum, taking advantage of double layers of metallic patches. After an introductory part on the properties of high impedance surfaces, this work documents both their design by means of numerical codes and their implementation on a scaled mock-up.

  20. Printing and Scanning Instructions Printing on Savin (reserved for Job Market/RA/TA print jobs ONLY)

    E-Print Network [OSTI]

    Niebur, Ernst

    1 Printing and Scanning Instructions Printing on Savin (reserved for Job Market/RA/TA print jobs, stapling, or three holes punch, you can find them under the "Layout" tab and "Advanced". #12;2 Scanning on Savin (NOTE: scanning is Free of Charge) A feature of the new copier is the option of using it to scan

  1. Hybrid connection of RF MEMS and SMT components in an impedance tuner Mehmet Unlu , Kagan Topalli, Halil Ibrahim Atasoy, Simsek Demir, Ozlem Aydin Civi, Tayfun Akin

    E-Print Network [OSTI]

    Akin, Tayfun

    Hybrid connection of RF MEMS and SMT components in an impedance tuner Mehmet Unlu Ă, Kagan Topalli Switch SMT Hybrid a b s t r a c t This paper presents a systematic construction of a model for a hybrid connected RF MEMS and SMT components in a reconfigurable impedance tuner. The double stub hybrid impedance

  2. Efficiency Improvements

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItem NotEnergy,ARMFormsGasRelease Date:research community --EducationEfficiency

  3. Energy Efficiency

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContractElectron-StateEnergyHeavy Duty VehicleNuclearEnergy-Efficiency Sign In

  4. University of Sheffield Sustainable Print Policy 2013

    E-Print Network [OSTI]

    Martin, Stephen John

    produced, print consumables used, the number of personal printing devices on campus. 3. It applies to all screen or via projection at meetings, use of personal devices such as laptop computers or tablets. 9 printing devices whether connected to the network, connected locally via desktop computing, photocopiers

  5. PAPILLON: Designing Curved Display Surfaces With Printed Optics

    E-Print Network [OSTI]

    Poupyrev, Ivan

    . It is based on 3D printed optics, where the surface of the display is constructed as a bundle of printed light Interfaces - Graphical user interfaces; Input devices and strategies. Keywords: 3D printing, fabrication

  6. E-print Network : Main View : Deep Federated Search

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

    E-print Network Search Powered By Deep Web Technologies New Search Preferences E-print Network E-print Network Skip to main content FAQ * HELP * SITE MAP * CONTACT US Home * About...

  7. Organic and Printed Electronics for Biological Microfluidic Applications

    E-Print Network [OSTI]

    Jagannathan, Lakshmi

    2012-01-01T23:59:59.000Z

    and Q. Zhang, “Printed electronics for low-cost electronicUltra-Low-Cost Printed Electronics,” Ph.D. dissertation,capability of printed electronics to make important aspects

  8. Business Agreements Printing & Mail Services

    E-Print Network [OSTI]

    Business Agreements Storehouse Printing & Mail Services Receiving Equipment Management Director Planning/ Resource Planning Space ManagementAccounting Services Student Business Services Education Administration Finance and Business Operations Organization Risk Management Finance & Business Operations

  9. Raman spectra of aligned carbon micro-coils and their impedance characteristics under loads

    SciTech Connect (OSTI)

    Tao, Wang; Yabo, Zhu, E-mail: zhuyabo@163.com; Heliang, Fan; Zhicheng, Ju; Lei, Chen; Zhengyuan, Wang [School of Materials Science and Engineering, China University of Mining and Technology, Xu Zhou, Jiangsu 221116 (China)

    2014-02-21T23:59:59.000Z

    Scanning and transmission electron microscopy were used to characterize the morphology of the carbon microcoils (CMCs). The Raman spectra showed that CMCs had local regular structure as I{sub D}/I{sub G}?=?0.841. Then, aligned CMCs/silicone–rubber composites (5?×?5?×?1 mm{sup 3}) were fabricated by coating of silicone rubber on the CMCs. Their alternating current impedance characteristics were measured as a function of applied load and the pressure sensitivity was discussed. The results showed that the impedance decreased as the increasing applied load, and the sample with less CMCs owned high pressure sensitivity, which indicated a novel composite film could act as an alternative of tactile sensor.

  10. A New First-Principles Calculation of Field-Dependent RF Surface Impedance of BCS Superconductor

    SciTech Connect (OSTI)

    Xiao, Binping [Brookhaven National Laboratory, Upton, New York (United States); Reece, Charles E. [Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)

    2014-02-01T23:59:59.000Z

    There is a need to understand the intrinsic limit of radiofrequency (RF) surface impedance that determines the performance of superconducting RF cavities in particle accelerators. Here we present a field-dependent derivation of Mattis-Bardeen theory of the RF surface impedance of BCS superconductors based on the shifted density of states resulting from coherently moving Cooper pairs. Our theoretical prediction of the effective BCS RF surface resistance (Rs) of niobium as a function of peak surface magnetic field amplitude agrees well with recently reported record low loss resonant cavity measurements from JLab and FNAL with carefully, yet differently, prepared niobium material. The surprising reduction in resistance with increasing field is explained to be an intrinsic effect.

  11. Electrochemical impedance spectroscopy study of nickel-iron deposition. 2: Theoretical interpretation

    SciTech Connect (OSTI)

    Baker, B.C.; West, A.C. [Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering, Materials Science, and Mining Engineering

    1997-01-01T23:59:59.000Z

    A mathematical model of the anomalous deposition of nickel-iron alloys is compared to steady state as well as electrochemical-impedance spectroscopy data taken on a rotating disk electrode. A key aspect of the model is the treatment of adsorption phenomena of the nickel and iron species. A modification of a previously proposed rate law for the adsorption of iron is shown to predict correctly the changes in alloy composition with the ferrous-ion concentration in the electrolyte. The model is also successful at predicting qualitatively the dependence of impedance data on bath concentration, degree of agitation, and current density. Discrepancies between theory and experiment are most significant at low current densities and high ferrous-ion concentrations.

  12. Impedance-matching experiments using high-pressure, laser-driven shock waves

    SciTech Connect (OSTI)

    Veeser, L.R.; Reeves, G.A.; Holmes, N.C.; Trainor, R.J.; Anderson, R.A.

    1981-01-01T23:59:59.000Z

    A high-power laser was used to produce shock waves with pressures of 300 to 700 GPa. A series of impedance-matching experiments on aluminum-copper systems with 10% accuracy indicate several areas in which the experiment can be improved to reduce the errors. Several such improvements are now being made, including upgrading both the laser and recording systems and modifying the target characterization techniques.

  13. Matrix solution to longitudinal impedance of multi-layer circular structures

    SciTech Connect (OSTI)

    Hahn,H.

    2008-10-01T23:59:59.000Z

    A matrix method in which radial wave propagation is treated in analogy to longitudinal transmission lines is presented and applied to finding the longitudinal coupling impedance of axially symmetric multi-layer beam tubes. The method is demonstrated in the case of a Higher Order Mode ferrite absorber with an inserted coated ceramic beam tube. The screening of the ferrite damping properties by the dielectric beam tube is discussed.

  14. Efficiency United (Gas)- Residential Efficiency Program

    Broader source: Energy.gov [DOE]

    The Efficiency United program is intended to provide assistance and incentives to customers who employ energy efficient measures. Programs offer rebates on natural gas water heaters, clothes...

  15. HVDC-AC system interaction from AC harmonics. Volume 1. Harmonic impedance calculations. Final report

    SciTech Connect (OSTI)

    Breuer, G D; Chow, J H; Lindh, C B; Miller, N W; Numrich, F H; Price, W W; Turner, A E; Whitney, R R

    1982-09-01T23:59:59.000Z

    Improved methods are needed to characterize ac system harmonic behavior for ac filter design for HVDC systems. The purpose of this General Electric Company RP1138 research is to evaluate the present filter design practice and to investigate methods for calculating system harmonic impedances. An overview of ac filter design for HVDC systems and a survey of literature related to filter design have been performed. Two methods for calculating system harmonic impedances have been investigated. In the measurement method, an instrumentation system for measuring system voltage and current has been assembled. Different schemes of using the measurements to calculate system harmonic impedances have been studied. In the analytical method, a procedure to include various operating conditions has been proposed. Computer programs for both methods have been prepared, and the results of the measurement and analytical methods analyzed. A conclusion of the project is that the measurement and analytical methods both provided reasonable results. There are correlations between the measured and analytical results for most harmonics, although there are discrepancies between the assumptions used in the two methods. A sensitivity approach has been proposed to further correlate the results. From the results of the analysis, it is recommended that both methods should be tested further. For the measurement method, more testing should be done to cover different system operating conditions. In the analytical method, more detailed models for representing system components should be studied. In addition, alternative statistical and sensitivity approaches should be attempted.

  16. Creating dynamic equivalent PV circuit models with impedance spectroscopy for arc-fault modeling.

    SciTech Connect (OSTI)

    Johnson, Jay Dean; Kuszmaul, Scott S.; Strauch, Jason E.; Schoenwald, David Alan

    2011-06-01T23:59:59.000Z

    Article 690.11 in the 2011 National Electrical Code{reg_sign} (NEC{reg_sign}) requires new photovoltaic (PV) systems on or penetrating a building to include a listed arc fault protection device. Currently there is little experimental or empirical research into the behavior of the arcing frequencies through PV components despite the potential for modules and other PV components to filter or attenuate arcing signatures that could render the arc detector ineffective. To model AC arcing signal propagation along PV strings, the well-studied DC diode models were found to inadequately capture the behavior of high frequency arcing signals. Instead dynamic equivalent circuit models of PV modules were required to describe the impedance for alternating currents in modules. The nonlinearities present in PV cells resulting from irradiance, temperature, frequency, and bias voltage variations make modeling these systems challenging. Linearized dynamic equivalent circuits were created for multiple PV module manufacturers and module technologies. The equivalent resistances and capacitances for the modules were determined using impedance spectroscopy with no bias voltage and no irradiance. The equivalent circuit model was employed to evaluate modules having irradiance conditions that could not be measured directly with the instrumentation. Although there was a wide range of circuit component values, the complex impedance model does not predict filtering of arc fault frequencies in PV strings for any irradiance level. Experimental results with no irradiance agree with the model and show nearly no attenuation for 1 Hz to 100 kHz input frequencies.

  17. Investigation of nanocrystalline CdS/Si diode using complex impedance spectroscopy

    SciTech Connect (OSTI)

    El-Gendy, Y.A. [Physics Department, Faculty of Science, Helwan University, Cairo (Egypt) [Physics Department, Faculty of Science, Helwan University, Cairo (Egypt); Umm Al-Qura University, University college, Physics Department, Alqunfoza (Saudi Arabia); Yahia, I.S., E-mail: dr_isyahia@yahoo.com [Nano-Science and Semiconductor Labs., Department of Physics, Faculty of Education, Ain Shams University, Roxy, Cairo (Egypt); Department of Physics, Faculty of Science, King Khaled University, P.O. Box 9004, Abha (Saudi Arabia); Yakuphanoglu, F. [Physics Department, Faculty of Science, Firat University, Elazig (Turkey)] [Physics Department, Faculty of Science, Firat University, Elazig (Turkey)

    2012-11-15T23:59:59.000Z

    Highlights: ? CdS/n-Si device was fabricated as a heterostructure. ? AFM was used to examine the structure of CdS/n-Si. ? Complex impedance Z?and Z?were calculated. ? AC conductivity was explained by the power law relation. ? CBH model was used to describe the AC conduction mechanism. -- Abstract: CdS/n-Si device was fabricated via depositing CdS thin film onto pre-cleaned n-silicon substrates. The atomic force microscope was used to examine the crystal size of the deposited films and its roughness. The AC conductivity and the real part of complex impedance Z?as a function of frequency at different temperatures were studied. The AC conductivity dependence of the applied frequency was explained on the basis of the power law relation. The bulk resistance has been calculated at different temperatures from the complex impedance Z?. The temperature dependence of capacitance for CdS/n-Si device at different frequencies was also investigated.

  18. acquisition facilitates 3d: Topics by E-print Network

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

    Physics Websites Summary: measurements and finally its instantiation through 3D printing, are presented. Laser scanner acquisition, reconstruction and 3D printing lend well...

  19. asce structural division: Topics by E-print Network

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

    ABSTRACT Using modular construction equipment and additive manufacturing (3D printing) techniques large-scale 3D printing have been developed and tested in earth-based...

  20. automated 3-d voxel: Topics by E-print Network

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

    Websites Summary: from a real-life application. 1 Introduction Recent advances in 3D printing technology have made of materials, higher printing speeds, and lower costs....

  1. Printing a Car: A Team Effort in Innovation (Text Version) |...

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

    video Printing a Car: A Team Effort in Innovation highlighting the demonstration of 3D printing to create a working electric vehicle, live during the International Manufacturing...

  2. advanced technologies directorate: Topics by E-print Network

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

    Directorate Geosciences Websites Summary: drew media attention and articles on 3D printing, including coverage by Popular Mechanics and website on 3D printing and prototyping...

  3. assess 3d bone: Topics by E-print Network

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

    Websites Summary: from a real-life application. 1 Introduction Recent advances in 3D printing technology have made of materials, higher printing speeds, and lower costs....

  4. asce divisions air: Topics by E-print Network

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

    ABSTRACT Using modular construction equipment and additive manufacturing (3D printing) techniques large-scale 3D printing have been developed and tested in earth-based...

  5. applying space technology: Topics by E-print Network

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

    Directorate Geosciences Websites Summary: drew media attention and articles on 3D printing, including coverage by Popular Mechanics and website on 3D printing and prototyping...

  6. assisted laser scanner: Topics by E-print Network

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

    pipeline Physics Websites Summary: measurements and finally its instantiation through 3D printing, are presented. Laser scanner acquisition, reconstruction and 3D printing lend...

  7. antennarius striatus shaw: Topics by E-print Network

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

    Sciences Websites Summary: 'real' and virtual). ART Decorative Arts Lharne Shaw, 3D Printing of Relief Forms onto Ceramic Tiles 3D printing of relief forms onto ceramic...

  8. aligned single wall: Topics by E-print Network

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

    Page Topic Index 1 Printed Multilayer Superstructures of Aligned Single-Walled Carbon Materials Science Websites Summary: Printed Multilayer Superstructures of Aligned...

  9. alara center alara: Topics by E-print Network

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

    Yamamoto Printed by: Hagadone Printing Company Photo: WaikikiINTERNATIONAL PACIFIC RESEARCH CENTER APRIL 2004-MARCH 2005 REPORT SCHOOL OF OCEAN AND EARTH . . . . . . . . . . ....

  10. Dispenser Printed Zinc Microbattery with an Ionic Liquid Gel Electrolyte

    E-Print Network [OSTI]

    Ho, Christine Chihfan

    2010-01-01T23:59:59.000Z

    using dispenser printing including (a) 3D polymer molds, (b)using dispenser printing including (a) 3D polymer molds, (b)

  11. 3D Printing in 30 Seconds | Department of Energy

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

    3D Printing in 30 Seconds 3D Printing in 30 Seconds Addthis An error occurred. Unable to execute Javascript. Duration :38 Topic Science & Technology...

  12. Disposable Carbon Nanotube Modified Screen-Printed Biosensor...

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

    Carbon Nanotube Modified Screen-Printed Biosensor for Amperometric Detection of Organophosphorus Pesticides and Nerve Disposable Carbon Nanotube Modified Screen-Printed Biosensor...

  13. Dispenser Printed Zinc Microbattery with an Ionic Liquid Gel Electrolyte

    E-Print Network [OSTI]

    Ho, Christine Chihfan

    2010-01-01T23:59:59.000Z

    Ink-jet printed carbon supercapacitor electrodes on gold,Ink-jet printed carbon supercapacitor electrodes on gold,Microcapacitors Thin film supercapacitor (TFSC) research has

  14. Voltammetric Analysis of Europium at Screen-Printed Electrodes...

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

    Voltammetric Analysis of Europium at Screen-Printed Electrodes Modified with Salicylamide Self-Assembled on Mesoporous Silica. Voltammetric Analysis of Europium at Screen-Printed...

  15. Energy efficient data centers

    E-Print Network [OSTI]

    Tschudi, William; Xu, Tengfang; Sartor, Dale; Koomey, Jon; Nordman, Bruce; Sezgen, Osman

    2004-01-01T23:59:59.000Z

    Report on Energy Efficient Data Centers - A Rocky MountainReport on Energy Efficient Data Centers - A Rocky MountainEnergy Efficient Data Centers Prepared by William Tschudi,

  16. Energy Efficiency Loan Program

    Broader source: Energy.gov [DOE]

    The Keystone HELP Energy Efficiency Loan Program is designed to help homeowners improve energy efficiency with special financing for high-efficiency heating, air conditioning, insulation, windows,...

  17. Printing | Department of Energy

    Energy Savers [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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sure you wantJoin us for| Department of Energy Primus Power'sPrinting

  18. International Journal of Computers, Systems and Signals, Vol. 5, No. 2, 2004 17 AN ADAPTIVE IMPEDANCE CONTROL SCHEME FOR

    E-Print Network [OSTI]

    Ge, Shuzhi Sam

    adaptive control law. In [9], the desired impedance was treated as the dynamic model of a plant driven, nn RqqC × ),( is the coriolis and centrifugal force matrix, n RqG )( is the gravitational force, n R

  19. alignment plots efficiently: Topics by E-print Network

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

    reddened interstellar radiation field. In particular, we found that, even deep inside giant molecular clouds, e.g. at optical depths corresponding to less than Av of 10 large...

  20. advancing industrial efficiency: Topics by E-print Network

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

    University of California eScholarship Repository Summary: Treatment Motor System Optimization Fuel Cells Microturbinesoptimization Advanced reciprocating engines Advanced...

  1. augment transfection efficiency: Topics by E-print Network

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

    patients with severely restricted peripheral Peli, Eli 96 RESEARCH ARTICLE Open Access SMART: scalable and modular augmented reality Engineering Websites Summary: RESEARCH...

  2. augmented reality efficiency: Topics by E-print Network

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

    for Improved Immersion Jan Fischer Visual Computing for Medicine, WSI Stra?er WSIGRIS University of Tubingen (a) Conventional augmented reality (b) Using...

  3. abundant efficient clean: Topics by E-print Network

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

    Materials Science Websites Summary: for India & US) workshop--December 8, 2012. Clean Coal Technology Projects updates on Consortium for Clean4th International Symposium on...

  4. analyzing fuel efficiency: Topics by E-print Network

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

    diesel, and bioelectricity; the respective powertrain systems include internal combustion engine (ICE) vehicles, hybrid electric vehicles based on gasoline or diesel ICEs, hydrogen...

  5. absolute efficiency calibration: Topics by E-print Network

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

    good. This is used in a technique developed for the absolute calibration of ultra high energy cosmic ray fluorescence telescopes, and it can also be applied to imaging atmospheric...

  6. allocative efficiency productive: Topics by E-print Network

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

    resource allocation, management and discovery problems. We consider new types of resource allocation models and constraints, and we present new geometric techniques which...

  7. allocation retaining efficiency: Topics by E-print Network

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

    resource allocation, management and discovery problems. We consider new types of resource allocation models and constraints, and we present new geometric techniques which...

  8. appliance efficiency program: Topics by E-print Network

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

    of California eScholarship Repository Summary: 2002. Commercial Cooking Appliance Technology Assessment.technology costs reported in Table 1 are not included in these plots...

  9. achieve efficient transmission: Topics by E-print Network

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

    Plants Websites Summary: ) establishes a framework for markets based on locational marginal pricing (LMP). The NOPR envisions a critical incentives. G iven the shortcomings of...

  10. absolute detection efficiencies: Topics by E-print Network

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

    advance Machian physics by maintaining that the heliocentric system must be replaced by Tycho Brahe's geocentric system. We show that while geocentrism relies on Mach's contention...

  11. absolute detection efficiency: Topics by E-print Network

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

    was measured versus the energy of the ion beam. For the MCP studies the microchannel plate was set up in the counting mode. The dark count... of the electronics Dark count of...

  12. advanced building efficiency: Topics by E-print Network

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

    for existing real estate, which has been in existence since 2005, into an integrated green building initiative. This initiative comprises... Kohns, R. 3 2005 BUILDING ENERGY...

  13. PDSF Job Efficiency

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

    Optimization Running Jobs Efficiently Running Jobs Efficiently Job Efficiency A job's efficiency is the ratio of its CPU time to the actual time it took to run, i.e., cputime ...

  14. FSU Office of Research Program in Interdisciplinary Computing (PIC) What is 3D printing?

    E-Print Network [OSTI]

    Ronquist, Fredrik

    (PIC) What is 3D printing? 3D printing is a process of making. 3D printing is distinct from traditional machining techniques, which mostly organs, meat, circuit boards and batteries. 3D printing impacts nearly every

  15. Improved e-Jet Printing -TFOT Improved e-Jet Printing

    E-Print Network [OSTI]

    Rogers, John A.

    Improved e-Jet Printing - TFOT Home Sections News Articles Forums About Us Improved e-Jet Printing at the University of Illinois have developed a technology that provides higher resolution and more versatility in e-jet printing. As opposed to conventional ink-jet printers, where heat or mechanical vibrations are used

  16. CAN 3D PRINTING REVOLUTIONIZE GLOBAL MANUFACTURING? A DELPHI STUDY

    E-Print Network [OSTI]

    CAN 3D PRINTING REVOLUTIONIZE GLOBAL MANUFACTURING? A DELPHI STUDY ­ Master Thesis Proposal ­ BACKGROUND 3D printing (or additive manufacturing) is not an entirely new phenomenon. First introduced and president of Foxconn, calls it a nice "gimmick" and even Nick Allen, founder of 3D printing company 3D Print

  17. Broadband impedance-matched electromagnetic structured ferrite composite in the megahertz range

    SciTech Connect (OSTI)

    Parke, L.; Hibbins, A. P.; Sambles, J. R. [Electromagnetic and Acoustic Materials Group, Department of Physics and Astronomy, University of Exeter, Stocker Road, Exeter, Devon EX4 4QL (United Kingdom); Youngs, I. J. [DSTL, Salisbury, Wiltshire SP4 0JQ (United Kingdom)

    2014-06-02T23:59:59.000Z

    A high refractive-index structured ferrite composite is designed to experimentally demonstrate broadband impedance matching to free-space. It consists of an array of ferrite cubes that are anisotropically spaced, thereby allowing for independent control of the effective complex permeability and permittivity. Despite having a refractive index of 9.5, the array gives less than 1% reflection and over 90% transmission of normally incident radiation up to 70?MHz for one of the orthogonal linear polarisations lying in a symmetry plane of the array. This result presents a route to the design of MHz-frequency ferrite composites with bespoke electromagnetic parameters for antenna miniaturisation.

  18. An algorithm for faulted phase and feeder selection under high impedance fault conditions

    E-Print Network [OSTI]

    Benner, Carl Lee

    1988-01-01T23:59:59.000Z

    proximate lines served by the same substation. Because of this signal propagation, a fault will be detected simultaneously on the faulted line and possibly several other lines served by the substation. Since it would not be plausible for a utility company... to deenergize the entire area served by a substation due to a high impedance fault on one lateral, a technique is needed to discriminate the faulted line from neighboring healthy feeders and healthy phases of the faulted feeder. Such a technique would also...

  19. Efficiency United (Gas)- Commercial Efficiency Program

    Broader source: Energy.gov [DOE]

    The Efficiency United Program, administered by CLEAResult Consulting, provides commercial gas incentives for the following Michigan utilities:

  20. Online tuning of impedance matching circuit for long pulse inductively coupled plasma source operation—An alternate approach

    SciTech Connect (OSTI)

    Sudhir, Dass; Bandyopadhyay, M., E-mail: mainak@ter-india.org; Chakraborty, A. [ITER-India, Institute for Plasma Research, A-29, GIDC, Sector-25, Gandhinagar, Gujarat 382 025 (India)] [ITER-India, Institute for Plasma Research, A-29, GIDC, Sector-25, Gandhinagar, Gujarat 382 025 (India); Kraus, W. [Max-Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, 85740 Garching (Germany)] [Max-Planck-Institut für Plasmaphysik, Boltzmannstrasse 2, 85740 Garching (Germany); Gahlaut, A.; Bansal, G. [Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428 (India)] [Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382 428 (India)

    2014-01-15T23:59:59.000Z

    Impedance matching circuit between radio frequency (RF) generator and the plasma load, placed between them, determines the RF power transfer from RF generator to the plasma load. The impedance of plasma load depends on the plasma parameters through skin depth and plasma conductivity or resistivity. Therefore, for long pulse operation of inductively coupled plasmas, particularly for high power (?100 kW or more) where plasma load condition may vary due to different reasons (e.g., pressure, power, and thermal), online tuning of impedance matching circuit is necessary through feedback. In fusion grade ion source operation, such online methodology through feedback is not present but offline remote tuning by adjusting the matching circuit capacitors and tuning the driving frequency of the RF generator between the ion source operation pulses is envisaged. The present model is an approach for remote impedance tuning methodology for long pulse operation and corresponding online impedance matching algorithm based on RF coil antenna current measurement or coil antenna calorimetric measurement may be useful in this regard.

  1. 228 IEEE TRANSACTIONS ON BIOMEDICAL CIRCUITS AND SYSTEMS, VOL. 6, NO. 3, JUNE 2012 Maximum Achievable Efficiency in Near-Field

    E-Print Network [OSTI]

    Gulak, P. Glenn

    the maximum possible power ef- ficiency under arbitrary input impedance conditions based on the general two are remotely powered by means of a power amplifier operating at a fixed carrier frequency. Additional or bidirectional command and data transfer. The power efficiency of the near-field link is a measure of: (i

  2. Faraday cup with nanosecond response and adjustable impedance for fast electron beam characterization

    SciTech Connect (OSTI)

    Hu Jing; Rovey, Joshua L. [Missouri University of Science and Technology (Formerly University of Missouri-Rolla), Rolla, Missouri 65409 (United States)

    2011-07-15T23:59:59.000Z

    A movable Faraday cup design with simple structure and adjustable impedance is described in this work. This Faraday cup has external adjustable shunt resistance for self-biased measurement setup and 50 {Omega} characteristic impedance to match with 50 {Omega} standard BNC coaxial cable and vacuum feedthroughs for nanosecond-level pulse signal measurements. Adjustable shunt resistance allows self-biased measurements to be quickly acquired to determine the electron energy distribution function. The performance of the Faraday cup is validated by tests of response time and amplitude of output signal. When compared with a reference source, the percent difference of the Faraday cup signal fall time is less than 10% for fall times greater than 10 ns. The percent difference of the Faraday cup signal pulse width is below 6.7% for pulse widths greater than 10 ns. A pseudospark-generated electron beam is used to compare the amplitude of the Faraday cup signal with a calibrated F-70 commercial current transformer. The error of the Faraday cup output amplitude is below 10% for the 4-14 kV tested pseudospark voltages. The main benefit of this Faraday cup is demonstrated by adjusting the external shunt resistance and performing the self-biased method for obtaining the electron energy distribution function. Results from a 4 kV pseudospark discharge indicate a ''double-humped'' energy distribution.

  3. AN ADVANCED CALIBRATION PROCEDURE FOR COMPLEX IMPEDANCE SPECTRUM MEASUREMENTS OF ADVANCED ENERGY STORAGE DEVICES

    SciTech Connect (OSTI)

    William H. Morrison; Jon P. Christophersen; Patrick Bald; John L. Morrison

    2012-06-01T23:59:59.000Z

    With the increasing demand for electric and hybrid electric vehicles and the explosion in popularity of mobile and portable electronic devices such as laptops, cell phones, e-readers, tablet computers and the like, reliance on portable energy storage devices such as batteries has likewise increased. The concern for the availability of critical systems in turn drives the availability of battery systems and thus the need for accurate battery health monitoring has become paramount. Over the past decade the Idaho National Laboratory (INL), Montana Tech of the University of Montana (Tech), and Qualtech Systems, Inc. (QSI) have been developing the Smart Battery Status Monitor (SBSM), an integrated battery management system designed to monitor battery health, performance and degradation and use this knowledge for effective battery management and increased battery life. Key to the success of the SBSM is an in-situ impedance measurement system called the Impedance Measurement Box (IMB). One of the challenges encountered has been development of an accurate, simple, robust calibration process. This paper discusses the successful realization of this process.

  4. The impedance problem of wave diffraction by a strip with higher order boundary conditions

    SciTech Connect (OSTI)

    Castro, L. P. [Center for Research and Development in Mathematics and Applications (CIDMA) and Department of Mathematics of University of Aveiro, 3810-193 Aveiro (Portugal); Simőes, A. M. [Center for Research and Development in Mathematics and Applications (CIDMA) and Department of Mathematics of University of Beira Interior, 6200-001 Covilhă (Portugal)

    2013-10-17T23:59:59.000Z

    This work is devoted to analyse an impedance boundary-transmission problem for the Helmholtz equation originated by a problem of wave diffraction by an infinite strip with higher order imperfect boundary conditions. A constructive approach of operator relations is built, which allows a transparent interpretation of the problem in an operator theory framework. In particular, different types of operator relations are exhibited for different types of operators acting between Lebesgue and Sobolev spaces on a finite interval and the positive half-line. All this has consequences in the understanding of the structure of this type of problems. In particular, a Fredholm characterization of the problem is obtained in terms of the initial space order parameters. At the request of the author and the Proceedings Editor the above article has been replaced with a corrected version. The original PDF file supplied to AIP Publishing contained an error in the title of the article. The original title appeared as: 'The Impedance Problem of Wave Diffraction by a trip with Higher Order Boundary Conditions.' This article has been replaced and the title now appears correctly online. The corrected article was published on 8 November 2013.

  5. Page | 1 Managed Print Project Outline Pull Printing

    E-Print Network [OSTI]

    Glasgow, University of

    by extending specialist printing facilities to all users. The principal drivers for the project are carbon. Estimates are: 40% reduction in CO2 (from 477,676kg to 286,857kg; 60% reduction in electricity usage from the completion of these initiatives. The UK government's introduction of the Carbon Reduction Commitments (CRC

  6. Energy Efficient Digital Networks

    E-Print Network [OSTI]

    Lanzisera, Steven

    2014-01-01T23:59:59.000Z

    2007. Enabling an Energy-Efficient Future Internet ThroughIEEE 802.3az: The Road to Energy Efficient Ethernet. IEEEPHY Compliant With New Energy Efficient Ethernet Guidelines;

  7. Compressed Air Supply Efficiency

    E-Print Network [OSTI]

    Joseph, B.

    2004-01-01T23:59:59.000Z

    This project, under contract from California Energy Commission, developed the CASE (Compressed Air Supply Efficiency) Index as a stand-alone value for compressor central plant efficiency. This Index captures the overall efficiency of a compressed...

  8. Energy Efficient Radio Resource

    E-Print Network [OSTI]

    Yanikomeroglu, Halim

    Energy Efficient Radio Resource Management in a Coordinated Multi-Cell Distributed Antenna System Omer HALILOGLU Introduction System Model Performance Evaluation Conclusion References Energy Efficient Hacettepe University 5 September 2014 Omer HALILOGLU (Hacettepe University) Energy Efficient Radio Resource

  9. Energy efficient data centers

    E-Print Network [OSTI]

    Tschudi, William; Xu, Tengfang; Sartor, Dale; Koomey, Jon; Nordman, Bruce; Sezgen, Osman

    2004-01-01T23:59:59.000Z

    Varone. 2002a. Energy- and Eco-Efficiency of Data Centres. ANew Buildings S Energy- and Eco-Efficiency of Data Centres:FC Source: Energy- and Eco-Efficiency of Data Centres: A

  10. Energy Efficiency -- Home Page

    U.S. Energy Information Administration (EIA) Indexed Site

    If you are having trouble, call 202-586-8800 for help. Home >Energy Users EEnergy Efficiency Page Energy-Efficiency Measurement MEASUREMENT DISCUSSION: Measures and Policy Issues...

  11. Data Center Energy Efficiency

    Broader source: Energy.gov [DOE]

    The Federal Energy Management Program (FEMP) supports data center efficiency initiatives by encouraging Federal agencies to adopt best practices and construct energy-efficient data centers.

  12. Energy Efficient Motors

    E-Print Network [OSTI]

    Hoffmeyer, W.

    1982-01-01T23:59:59.000Z

    , and how to interpret efficiency data. A perspective is given from which to evaluate available energy efficient motor offerings for a given application....

  13. Definition of Energy Efficiency

    U.S. Energy Information Administration (EIA) Indexed Site

    from energy-intensive industries. See "Energy-Efficiency Measurement: Discussion". bluenext.gif (2052 bytes) Energy-Efficiency Measurement line divider For specific questions...

  14. Water Efficiency Goal Guidance

    Broader source: Energy.gov [DOE]

    The Council on Environmental Quality (CEQ) issued water efficiency goal guidance in Federal Agency Implementation of Water Efficiency and Management Provisions of Executive Order 13514. This...

  15. Energy-Efficient Mortgages

    Broader source: Energy.gov [DOE]

    Homeowners can take advantage of energy efficient mortgages (EEM) to either finance energy efficiency improvements to existing homes, including renewable energy technologies, or to increase their...

  16. Method to detect the end-point for PCR DNA amplification using an ionically labeled probe and measuring impedance change

    DOE Patents [OSTI]

    Miles, Robin R. (Danville, CA); Belgrader, Phillip (Severna Park, MD); Fuller, Christopher D. (Oakland, CA)

    2007-01-02T23:59:59.000Z

    Impedance measurements are used to detect the end-point for PCR DNA amplification. A pair of spaced electrodes are located on a surface of a microfluidic channel and an AC or DC voltage is applied across the electrodes to produce an electric field. An ionically labeled probe will attach to a complementary DNA segment, and a polymerase enzyme will release the ionic label. This causes the conductivity of the solution in the area of the electrode to change. This change in conductivity is measured as a change in the impedance been the two electrodes.

  17. Computationally Efficient Modeling of High-Efficiency Clean Combustion...

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

    & Publications Computationally Efficient Modeling of High-Efficiency Clean Combustion Engines Computationally Efficient Modeling of High-Efficiency Clean Combustion Engines...

  18. Efficiency Nova Scotia Releases Energy Efficiency Mobile App...

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

    Efficiency Nova Scotia Releases Energy Efficiency Mobile App Efficiency Nova Scotia Releases Energy Efficiency Mobile App Graphic of the inside of a house, with table and chairs,...

  19. Maryland Efficiency Program Options

    Broader source: Energy.gov [DOE]

    Maryland Efficiency Program Options, from the Tool Kit Framework: Small Town University Energy Program (STEP).

  20. Standards for Electronic and Print Communications DEFINITIONS

    E-Print Network [OSTI]

    , announcements, etc. Publications via electronic media (e.g. University Home Page items on the World Wide Web the wide range of print and electronic correspondence, research and other funding proposals, business forms, and various other print or word processed vehicles that are intrinsic to the everyday functioning of offices

  1. Mentoring Agreement Form Printed Name of

    E-Print Network [OSTI]

    Edwards, Paul N.

    Mentoring Agreement Form Printed Name of Student Mentee Term of Graduation Student ID Date Student email address Signature of Mentee Printed Name of Faculty Mentor Signature of Faculty Mentor Students are responsible for requesting appointments with mentors at least once each semester

  2. Poster Printing on Esmeralda GENERAL INFORMATION

    E-Print Network [OSTI]

    Ahlers, Guenter

    Poster Printing on Esmeralda 6.18.14 GENERAL INFORMATION · Location o The poster printer is located Poster Printer (HP Designjet z6100) [Esmeralda] DesignJet printer should be on. If red light is glowing PowerPoint file o From the File menu, choose Print. o Select Printer name: Esmeralda Direct o Click

  3. Content-adaptive Lenticular Prints James Tompkin

    E-Print Network [OSTI]

    Kautz, Jan

    to fixed-size lens arrays. We demonstrate our tech- nique using rendered simulations and by 3D printing.1 [Computer Graphics]: Hardware Architec- ture --Three-dimensional displays; Keywords: Lenticular displays, 3D printing. Links: DL PDF WEB 1 Introduction Displays that provide the illusion of three dimensions have

  4. SURFACE SEGREGATION STUDIES OF SOFC CATHODES: COMBINING SOFT X-RAYS AND ELECTROCHEMICAL IMPEDENCE SPECTROSCOPY

    SciTech Connect (OSTI)

    Miara, Lincoln J.; Piper, L.F.J.; Davis, Jacob N.; Saraf, Laxmikant V.; Kaspar, Tiffany C.; Basu, Soumendra; Smith, K. E.; Pal, Uday B.; Gopalan, Srikanth

    2010-12-01T23:59:59.000Z

    A system to grow heteroepitaxial thin-films of solid oxide fuel cell (SOFC) cathodes on single crystal substrates was developed. The cathode composition investigated was 20% strontium-doped lanthanum manganite (LSM) grown by pulsed laser deposition (PLD) on single crystal (111) yttria-stabilized zirconia (YSZ) substrates. By combining electrochemical impedance spectroscopy (EIS) with x-ray photoemission spectroscopy (XPS) and x-ray absorption spectroscopy XAS measurements, we conclude that electrically driven cation migration away from the two-phase gas-cathode interface results in improved electrochemical performance. Our results provide support to the premise that the removal of surface passivating phases containing Sr2+ and Mn2+, which readily form at elevated temperatures even in O2 atmospheric pressures, is responsible for the improved cathodic performance upon application of a bias.

  5. Nonstationary phase boundary estimation in electrical impedance tomography using unscented Kalman filter

    SciTech Connect (OSTI)

    Ijaz, Umer Zeeshan; Khambampati, Anil Kumar [Department of Electronic Engineering, Cheju National University, Cheju 690-756 (Korea, Republic of); Lee, Jeong Seong; Kim, Sin [Department of Nuclear and Energy Engineering, Cheju National University, Cheju 690-756 (Korea, Republic of); Kim, Kyung Youn [Department of Electronic Engineering, Cheju National University, Cheju 690-756 (Korea, Republic of)], E-mail: kyungyk@cheju.ac.kr

    2008-07-20T23:59:59.000Z

    In this paper, an effective nonstationary phase boundary estimation scheme in electrical impedance tomography is presented based on the unscented Kalman filter. The inverse problem is treated as a stochastic nonlinear state estimation problem with the nonstationary phase boundary (state) being estimated online with the aid of unscented Kalman filter. This research targets the industrial applications, such as imaging of stirrer vessel for detection of air distribution or detecting large air bubbles in pipelines. Within the domains, there exist 'voids' having zero conductivity. The design variables for phase boundary estimation are truncated Fourier coefficients. Computer simulations and experimental results are provided to evaluate the performance of unscented Kalman filter in comparison with extended Kalman filter to show a better performance of the unscented Kalman filter approach.

  6. Investigation of the suppression effect of polyethylene glycol on copper electroplating by electrochemical impedance spectroscopy

    SciTech Connect (OSTI)

    Hung, C.-C.; Lee, W.-H.; Wang, Y.-L.; Chan, D.-Y.; Hwang, G.-J. [Department of Electrical Engineering, National Cheng Kung University, Tainan 701, Taiwan (China); Department of Electrical Engineering, National Chiayi University, Chiayi, Taiwan (China); College of Science and Engineering, National University of Tainan, Tainan 700, Taiwan (China)

    2008-09-15T23:59:59.000Z

    Polyethylene glycol (PEG) is an additive that is commonly used as a suppressor in the semiconductor copper (Cu)-electroplating process. In this study, electrochemical impedance spectroscopy (EIS) was used to analyze the electrochemical behavior of PEG in the Cu-electroplating process. Polarization analysis, cyclic-voltammetry stripping, and cell voltage versus plating time were examined to clarify the suppression behavior of PEG. The equivalent circuit simulated from the EIS data shows that PEG inhibited the Cu-electroplating rate by increasing the charge-transfer resistance as well as the resistance of the adsorption layer. The presence of a large inductance demonstrated the strong adsorption of cuprous-PEG-chloride complexes on the Cu surface during the Cu-electroplating process. Increasing the PEG concentration appears to increase the resistances of charge transfer, the adsorption layer, and the inductance of the electroplating system.

  7. SU-E-I-52: Validation of Multi-Frequency Electrical Impedance Tomography Using Computed Tomography

    SciTech Connect (OSTI)

    Kohli, K; Liu, F; Krishnan, K [BC Cancer Agency, Surrey, BC (United Kingdom)

    2014-06-01T23:59:59.000Z

    Purpose: Multi-frequency EIT has been reported to be a potential tool in distinguishing a tissue anomaly from background. In this study, we investigate the feasibility of acquiring functional information by comparing multi-frequency EIT images in reference to the structural information from the CT image through fusion. Methods: EIT data was acquired from a slice of winter melon using sixteen electrodes around the phantom, injecting a current of 0.4mA at 100, 66, 24.8 and 9.9 kHz. Differential EIT images were generated by considering different combinations of pair frequencies, one serving as reference data and the other as test data. The experiment was repeated after creating an anomaly in the form of an off-centered cavity of diameter 4.5 cm inside the melon. All EIT images were reconstructed using Electrical Impedance Tomography and Diffuse Optical Tomography Reconstruction Software (EIDORS) package in 2-D differential imaging mode using one-step Gaussian Newton minimization solver. CT image of the melon was obtained using a Phillips CT Scanner. A segmented binary mask image was generated based on the reference electrode position and the CT image to define the regions of interest. The region selected by the user was fused with the CT image through logical indexing. Results: Differential images based on the reference and test signal frequencies were reconstructed from EIT data. Result illustrated distinct structural inhomogeneity in seeded region compared to fruit flesh. The seeded region was seen as a higherimpedance region if the test frequency was lower than the base frequency in the differential EIT reconstruction. When the test frequency was higher than the base frequency, the signal experienced less electrical impedance in the seeded region during the EIT data acquisition. Conclusion: Frequency-based differential EIT imaging can be explored to provide additional functional information along with structural information from CT for identifying different tissues.

  8. Mass Transport Investigated with the Electrochemical and Electrogravimetric Impedance Techniques. 3. Complex Charge Transport in PPy/PSS Films

    E-Print Network [OSTI]

    Kwak, Juhyoun

    Mass Transport Investigated with the Electrochemical and Electrogravimetric Impedance Techniques. 3. Complex Charge Transport in PPy/PSS Films Haesik Yang and Juhyoun Kwak* Department of Chemistry, Korea AdVember 24, 1997 For the first time, the complex charge transport mechanism for polypyrrole

  9. Mass Transport Investigated with the Electrochemical and Electrogravimetric Impedance Techniques. 2. Anion and Water Transport in PMPy and PPy Films

    E-Print Network [OSTI]

    Kwak, Juhyoun

    Mass Transport Investigated with the Electrochemical and Electrogravimetric Impedance Techniques. 2. Anion and Water Transport in PMPy and PPy Films Haesik Yang and Juhyoun Kwak* Department of Chemistry Water transport during anion transport in poly(N-methylpyrrole/nitrate) (PMPy/NO3), poly

  10. Mass Transport Investigated with the Electrochemical and Electrogravimetric Impedance Techniques. 1. Water Transport in PPy/CuPTS Films

    E-Print Network [OSTI]

    Kwak, Juhyoun

    Mass Transport Investigated with the Electrochemical and Electrogravimetric Impedance Techniques. 1. Water Transport in PPy/CuPTS Films Haesik Yang and Juhyoun Kwak* Department of Chemistry, Korea AdVember 18, 1996X Water transport in poly(pyrrole/copper phthalocyaninetetrasulfonate) (PPy/CuPTS) films

  11. Details of the Electro-Mechanical (E/M) Impedance Health Monitoring of Spot-Welded Structural Joints

    E-Print Network [OSTI]

    Giurgiutiu, Victor

    1 Details of the Electro-Mechanical (E/M) Impedance Health Monitoring of Spot-Welded Structural sensors for health monitoring spot-welded structural joints. Experiments were performed on aluminum-electric transducer; Crack propagation; Crack detection. 1. INTRODUCTION Health monitoring of structural joints

  12. Eddy-current probe impedance due to a volumetric flaw J. R. Bowler and S. A. Jenkins

    E-Print Network [OSTI]

    Bowler, John R.

    Eddy-current probe impedance due to a volumetric flaw J. R. Bowler and S. A. Jenkins University 25 January 1991) Eddy current induced in a metal by a coil carrying an alternating current may, or inclusions. In eddy-current nondestructive evaluation, defectsare commonly sensedby a change of the coil

  13. The superconducting gap of in situ MgB2 thin films by microwave surface impedance measurements

    E-Print Network [OSTI]

    Sridhar, Srinivas

    The superconducting gap of in situ MgB2 thin films by microwave surface impedance measurements N March 2002; accepted 4 September 2002 Precision measurements of the microwave surface resistance Rs of in situ MgB2 films directly reveal an exponential behavior of Rs at low temperature indicating a fully

  14. High-resolution reservoir characterization by an acoustic impedance inversion of a Tertiary deltaic clinoform system in the North Sea

    E-Print Network [OSTI]

    van Vliet, Lucas J.

    High-resolution reservoir characterization by an acoustic impedance inversion of a Tertiary deltaic a low level of parameterization embedded in a geologic framework and is computationally fast. The second in the geologic settings of the res- ervoir; however, there is no explicit geologic significance and the method

  15. Electrical impedance tomography of carbon nanotube composite Tsung-Chin Hou, Kenneth J. Loh, Jerome P. Lynch1

    E-Print Network [OSTI]

    Lynch, Jerome P.

    Electrical impedance tomography of carbon nanotube composite materials Tsung-Chin Hou, Kenneth J composites with the carbon nanotube significantly contributing to bulk material properties. One approach. Carbon nanotubes are included in the composite material by dispersing them in the polyanionic solution

  16. Abstract--The Envelope Impedance (EI) concept was used to investigate the thermal effects on the stability of

    E-Print Network [OSTI]

    Abstract-- The Envelope Impedance (EI) concept was used to investigate the thermal effects) systems. The envelope analysis of the CCFL, which was verified experimentally, revealed that the magnitude and envelope simulation based on phasor transformation [1-4]. Still lacking, however, is an understanding

  17. Impedance in Isolated Mouse Lungs for the Determination of Site of Action of Vasoactive Agents and Disease

    E-Print Network [OSTI]

    Chesler, Naomi C.

    Impedance in Isolated Mouse Lungs for the Determination of Site of Action of Vasoactive Agents the review of this article. Abstract--Hypoxic pulmonary hypertension is a disease of the lung vasculature that is usually quantified by pulmonary vascular resistance (PVR). However, a more complete description of lung

  18. Multi-Machine Systems with Constant Impedance Loads The parts of the text which we have yet to cover include

    E-Print Network [OSTI]

    McCalley, James D.

    : Multimachine systems with constant impedance loads · Chapters 10-13: Speed governing and prime movers (steam/hydro/CTs/CC units) We will not study chapters 7 and 8 (excitation) or 10-13 (turbine- governors) at all does the same thing, except instead of transient instability, it extends the coverage of small

  19. Department of Energy Office of Energy Efficiency and Renewable Energy Solid Lighting Core Technologies

    SciTech Connect (OSTI)

    Jiangeng Xue; Elliot Douglas

    2011-03-31T23:59:59.000Z

    The overall objective of this project is to demonstrate an ultra-effective light extraction mechanism that can be universally applied to all top-emitting white OLEDs (TE-WOLEDs) and can be integrated with thin film encapsulation techniques. The scope of work proposed in this project includes four major areas: (1) optical modeling; (2) microlens and array fabrication; (3) fabrication, encapsulation, and characterization of TE-WOLEDs; and (4) full device integration and characterization. First, the light extraction efficiency in a top-emitting OLED with or without a microlens array are modeled using wave optics. Second, individual microlenses and microlens arrays are fabricated by inkjet printing of microdroplets of a liquid thiol-ene monomer with high refractive index followed by photopolymerization. Third, high efficiency top-emitting white OLEDs are fabricated, and fully characterized. Finally, optimized microlens arrays are fabricated on TE-WOLEDs with dielectric barrier layers. The overall light extraction efficiency of these devices, as well as its wavelength and angular dependencies, are measured by comparing the efficiencies of devices with and without microlens arrays. In conclusion, we have demonstrated the feasibility of applying inkjet printed microlens arrays to enhance the light extraction efficiency of top-emitting white OLEDs. We have shown that the geometry (contact angle) of the printed microlenses can be controlled by controlling the surface chemistry prior to printing the lenses. A 90% enhancement in the light extraction efficiency has been achieved with printed microlens array on a top-emitting white OLED, which can be further improved to 140% using a more close-packed microlens array fabricated from a molding process. Future work will focus on improvement of the microlens fabrication process to improve the array fill factor and the contact angle, as well as use transparent materials with a higher index of refraction. We will also further optimize the procedures for integrating the microlenses on the top-emitting white OLEDs and characterize the overall light extraction enhancement factor when the microlens array is attached.

  20. Efficient multiparty quantum-secret-sharing schemes

    SciTech Connect (OSTI)

    Xiao Li; Deng Fuguo [Department of Physics, Tsinghua University, Beijing 100084 (China); Key Laboratory for Quantum Information and Measurements, MOE, Beijing 100084 (China); Long Guilu [Department of Physics, Tsinghua University, Beijing 100084 (China); Key Laboratory for Quantum Information and Measurements, MOE, Beijing 100084 (China); Center of Atomic and Molecular NanoSciences, Tsinghua University, Beijing 100084 (China); Center for Quantum Information, Tsinghua University, Beijing 100084 (China); Pan Jianwei [Institute for Experimental Physics University of Vienna, Boltzmanngasse 5, Vienna 9 (Austria)

    2004-05-01T23:59:59.000Z

    In this work, we generalize the quantum-secret-sharing scheme of Hillery, Buzek, and Berthiaume [Phys. Rev. A 59, 1829 (1999)] into arbitrary multiparties. Explicit expressions for the shared secret bit is given. It is shown that in the Hillery-Buzek-Berthiaume quantum-secret-sharing scheme the secret information is shared in the parity of binary strings formed by the measured outcomes of the participants. In addition, we have increased the efficiency of the quantum-secret-sharing scheme by generalizing two techniques from quantum key distribution. The favored-measuring-basis quantum-secret-sharing scheme is developed from the Lo-Chau-Ardehali technique [H. K. Lo, H. F. Chau, and M. Ardehali, e-print quant-ph/0011056] where all the participants choose their measuring-basis asymmetrically, and the measuring-basis-encrypted quantum-secret-sharing scheme is developed from the Hwang-Koh-Han technique [W. Y. Hwang, I. G. Koh, and Y. D. Han, Phys. Lett. A 244, 489 (1998)] where all participants choose their measuring basis according to a control key. Both schemes are asymptotically 100% in efficiency, hence nearly all the Greenberger-Horne-Zeilinger states in a quantum-secret-sharing process are used to generate shared secret information.

  1. Full-wave algorithms for model order reduction and electromagnet analysis of impedance and scattering

    E-Print Network [OSTI]

    Klemas, Thomas J. (Thomas Jonas)

    2005-01-01T23:59:59.000Z

    As technology advances and sophisticated electronic systems achieve ubiquity, the demand for thorough, efficient Electromagnetic (EM) analysis continues to rise. The prohibitive costs of constructing and maintaining ...

  2. Heat sinking for printed circuitry

    DOE Patents [OSTI]

    Wilson, S.K.; Richardson, G.; Pinkerton, A.L.

    1984-09-11T23:59:59.000Z

    A flat pak or other solid-state device mounted on a printed circuit board directly over a hole extends therethrough so that the bottom of the pak or device extends beyond the bottom of the circuit board. A heat sink disposed beneath the circuit board contacts the bottom of the pak or device and provides direct heat sinking thereto. Pressure may be applied to the top of the pak or device to assure good mechanical and thermal contact with the heat sink.

  3. Building Energy Efficient Schools

    E-Print Network [OSTI]

    McClure, J. D.; Estes, J. M.

    1985-01-01T23:59:59.000Z

    Many new school buildings consume only half the energy required by similar efficient structures designed without energy performance as a design criterion. These are comfortable and efficient while construction costs remain about the same as those...

  4. Energy Efficiency Resource Standard

    Broader source: Energy.gov [DOE]

    In 2008, New Mexico enacted H.B. 305, the Efficient Use of Energy Act, which created an Energy Efficiency Resource Standard (EERS) for New Mexico’s electric utilities, and a requirement that all ...

  5. Energy Efficiency Strategies 

    E-Print Network [OSTI]

    Dillingham, G.

    2012-01-01T23:59:59.000Z

    their energy consumption to stay competitive. An alternative to reduced energy consumption is to put in place an energy efficiency strategy. However, while most plastic manufactures are aware of the energy efficiency opportunities in their facilities...

  6. Energy Efficiency Fund

    Broader source: Energy.gov [DOE]

    Note: The 2013 Three Year Efficiency Plans have not yet been approved. The process is underway. For the latest draft plan, review the Massachusetts Energy Efficiency Advisory Council [http://www.ma...

  7. Energy Efficiency Goals

    Broader source: Energy.gov [DOE]

    In 2009, Missouri enacted the Missouri Energy Efficiency Investment Act, creating energy efficiency sales and peak reduction goals to be met through investment in demand side management. The goals...

  8. Distillation: The Efficient Workhorse

    E-Print Network [OSTI]

    Steinmeyer, D.

    DISTILLATION: THE EFFICIENT WORKHORSE Dan Steinmeyer Monsanto Company St. Louis, Missouri Distillation is inherently highly efficient: phase separation is clean it is relatively easy to build a mUltistage countercurrent device equilibrium... is closely approached on each stage Given the right perspective; the right application; and the right design - distillation is difficult to beat from an efficiency standpoint. ? The right perspective is that efficiency is the ratio of the work...

  9. Energy Efficiency Program Overview

    E-Print Network [OSTI]

    Mutiso,S.

    2014-01-01T23:59:59.000Z

    Energy Efficiency Program Overview Clean Air Through Energy Efficiency CATEE Conference November 18-20, 2014 Dallas, TX ESL-KT-14-11-02 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 General Overview • State of Texas... enacted legislation requiring Transmission and Distribution utilities (TDUs) achieve annual goals for energy efficiency • Public Utility Commission of Texas (PUCT) implemented rules and guidelines for consistency among the TDU programs • Texas TDUs...

  10. Energy Efficiency Financing

    Office of Energy Efficiency and Renewable Energy (EERE)

    Information and examples of state financing for energy efficiency programs, with descriptions on implementation methods and concerns.

  11. Gas cushion control of OVJP print head position

    DOE Patents [OSTI]

    Forrest, Stephen R

    2014-10-07T23:59:59.000Z

    An OVJP apparatus and method for applying organic vapor or other flowable material to a substrate using a printing head mechanism in which the print head spacing from the substrate is controllable using a cushion of air or other gas applied between the print head and substrate. The print head is mounted for translational movement towards and away from the substrate and is biased toward the substrate by springs or other means. A gas cushion feed assembly supplies a gas under pressure between the print head and substrate which opposes the biasing of the print head toward the substrate so as to form a space between the print head and substrate. By controlling the pressure of gas supplied, the print head separation from the substrate can be precisely controlled.

  12. eSales Interactive Mapping -Viewing and Printing Introduction

    E-Print Network [OSTI]

    eSales Interactive Mapping - Viewing and Printing Introduction Our eSales system includes an integrated interactive map facility. This allows you to view and print maps for all lots on offer. Various

  13. advanced packaging technology: Topics by E-print Network

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

    David Smukowski, Sensors in Motion Embedded Actuation and Sensing Via Multi-Material 3D Printing.m. 3D Printing Multi-Functionality: Mec Materials for 2.5D and 3D Packaging Systems...

  14. advanced packaging technologies: Topics by E-print Network

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

    David Smukowski, Sensors in Motion Embedded Actuation and Sensing Via Multi-Material 3D Printing.m. 3D Printing Multi-Functionality: Mec Materials for 2.5D and 3D Packaging Systems...

  15. actinobacillus pleuropneumonia part: Topics by E-print Network

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

    was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...

  16. abnormal 3-d mri: Topics by E-print Network

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

    was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...

  17. axial 3-d pet: Topics by E-print Network

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

    was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...

  18. advanced electronic packages: Topics by E-print Network

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

    David Smukowski, Sensors in Motion Embedded Actuation and Sensing Via Multi-Material 3D Printing.m. 3D Printing Multi-Functionality: Mec Materials for 2.5D and 3D Packaging Systems...

  19. antimyosin fab imaging: Topics by E-print Network

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

    simultaneously. Testing procedures: Demonstrate de Lijser, Peter 14 TCAUP FabLab 3D PRINTING ORDER FORM Engineering Websites Summary: TCAUP FabLab 3D PRINTING ORDER FORM: UNIQ...

  20. auslese von 3d: Topics by E-print Network

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

    was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a 3D...

  1. aeneus fab larvae: Topics by E-print Network

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

    simultaneously. Testing procedures: Demonstrate de Lijser, Peter 18 TCAUP FabLab 3D PRINTING ORDER FORM Engineering Websites Summary: TCAUP FabLab 3D PRINTING ORDER FORM: UNIQ...

  2. anthropomorphic models pt: Topics by E-print Network

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

    -driven, anthropomorphic robotic hand. The prototyping process makes the most of 3D printing technology, and takes@cs.washington.edu Fig. 1. The 3D-printed 20-DOF...

  3. autostereoscopic 3d display: Topics by E-print Network

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

    or restrict themselves to light dif- fusion in volumes. We use multi-material 3D printing to fabricate objects Additional Key Words and Phrases: 3D printing, optical fibers...

  4. Characterizing tensile loading responses of 3D printed samples

    E-Print Network [OSTI]

    Haid, Christopher M

    2014-01-01T23:59:59.000Z

    An experimental study was performed to characterize the loading response of samples manufactured through 3D printing. Tensile testing was performed on a number of 3D printed samples created through Fused Filament Fabrication ...

  5. Mechanical testing of rapid-prototyping refractory ceramic print media

    E-Print Network [OSTI]

    Martin, Rachel (Rachel M.)

    2013-01-01T23:59:59.000Z

    Additively manufactured (3D-printed) refractory alumina-silica ceramics were mechanically tested to ascertain their ultimate tensile strengths and observed to determine their dimensional consistency over the printing and ...

  6. aperture radar 3d: Topics by E-print Network

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

    study was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a...

  7. accuracy 3d quantum: Topics by E-print Network

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

    study was performed to understand the correlation between printing parameters in the FDM 3D printing process, and the force required to remove a part from the build platform of a...

  8. Three-dimensionally printed biological machines powered by skeletal muscle

    E-Print Network [OSTI]

    Bashir, Rashid

    in animals, as a con- tractile power source. Here, we report the development of 3D printed hydrogel "bio-bots were optimized using stereolithographic 3D printing, and the ef- fect of collagen I and fibrin

  9. Reactive binders for metal parts produced by Three Dimensional Printing

    E-Print Network [OSTI]

    Yoo, Helen Jean

    1997-01-01T23:59:59.000Z

    Three Dimensional Printing (3DP) is a solid free form fabrication process which enables the construction of parts directly from computer-aided design (CAD) models. In the current process, metal parts are produced by printing ...

  10. Managing Energy Efficiency Improvement

    E-Print Network [OSTI]

    Almaguer, J.

    2006-01-01T23:59:59.000Z

    efficiency opportunities as well as promote the use of energy efficient methodologies and technologies. If, as program results suggest, 15% to 20% of the gas that is now consumed at by plant operations can be saved through efficiencies, it would save $500...

  11. OPTIONS for ENERGY EFFICIENCY

    E-Print Network [OSTI]

    OPTIONS for ENERGY EFFICIENCY in EXISTING BUILDINGS December 2005 CEC-400-2005-039-CMF.B. Blevins Executive Director Valerie Hall Deputy Director Efficiency, Renewables and Demand Analysis Elaine Hussey Contract Manager #12;Acknowledgments The Efficiency Committee expresses its gratitude

  12. ENTRY LOBBY ENERGY EFFICIENCY

    E-Print Network [OSTI]

    Escher, Christine

    ENTRY LOBBY ENERGY EFFICIENCY Clerestory windows provide natural day-lighting.· Exterior roof SUSTAINABILITY FEATURES #12;ADMINISTRATION ENERGY EFFICIENCY High performance window glazing· minimizes heat gain. Skylights provide natural day-lighting.· High-efficiency lighting reduces energy· costs and heat gain

  13. Glowing Bacteria: Transformation Efficiency

    E-Print Network [OSTI]

    Rose, Michael R.

    1 Glowing Bacteria: Transformation Efficiency Purpose: To determine how well your E. coli cells took up and expressed GFP after transformation. Background: Transformation efficiency is a quantitative)______ (Fraction of DNA spread on plate) = ______ µg plasmid DNA spread on plate #12;2 5. Transformation efficiency

  14. Buildings Energy Efficiency Policy

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    Efficiency Wind Biomass Natural Gas Combined Cycle Nuclear Coal IGCC Photovoltaics RangeofBuildings Energy Efficiency Policy ­ A Brief History Steven Nadel Executive Director American Council for an Energy- Efficient Economy #12;U.S. Energy Use in Relation to GDP 1970-2008 0.0 50.0 100

  15. Advanced Energy Efficient Roof System

    SciTech Connect (OSTI)

    Jane Davidson

    2008-09-30T23:59:59.000Z

    Energy consumption in buildings represents 40 percent of primary U.S. energy consumption, split almost equally between residential (22%) and commercial (18%) buildings.1 Space heating (31%) and cooling (12%) account for approximately 9 quadrillion Btu. Improvements in the building envelope can have a significant impact on reducing energy consumption. Thermal losses (or gains) from the roof make up 14 percent of the building component energy load. Infiltration through the building envelope, including the roof, accounts for an additional 28 percent of the heating loads and 16 percent of the cooling loads. These figures provide a strong incentive to develop and implement more energy efficient roof systems. The roof is perhaps the most challenging component of the building envelope to change for many reasons. The engineered roof truss, which has been around since 1956, is relatively low cost and is the industry standard. The roof has multiple functions. A typical wood frame home lasts a long time. Building codes vary across the country. Customer and trade acceptance of new building products and materials may impede market penetration. The energy savings of a new roof system must be balanced with other requirements such as first and life-cycle costs, durability, appearance, and ease of construction. Conventional residential roof construction utilizes closely spaced roof trusses supporting a layer of sheathing and roofing materials. Gypsum board is typically attached to the lower chord of the trusses forming the finished ceiling for the occupied space. Often in warmer climates, the HVAC system and ducts are placed in the unconditioned and otherwise unusable attic. High temperature differentials and leaky ducts result in thermal losses. Penetrations through the ceilings are notoriously difficult to seal and lead to moisture and air infiltration. These issues all contribute to greater energy use and have led builders to consider construction of a conditioned attic. The options considered to date are not ideal. One approach is to insulate between the trusses at the roof plane. The construction process is time consuming and costs more than conventional attic construction. Moreover, the problems of air infiltration and thermal bridges across the insulation remain. Another approach is to use structurally insulated panels (SIPs), but conventional SIPs are unlikely to be the ultimate solution because an additional underlying support structure is required except for short spans. In addition, wood spline and metal locking joints can result in thermal bridges and gaps in the foam. This study undertook a more innovative approach to roof construction. The goal was to design and evaluate a modular energy efficient panelized roof system with the following attributes: (1) a conditioned and clear attic space for HVAC equipment and additional finished area in the attic; (2) manufactured panels that provide structure, insulation, and accommodate a variety of roofing materials; (3) panels that require support only at the ends; (4) optimal energy performance by minimizing thermal bridging and air infiltration; (5) minimal risk of moisture problems; (6) minimum 50-year life; (7) applicable to a range of house styles, climates and conditions; (8) easy erection in the field; (9) the option to incorporate factory-installed solar systems into the panel; and (10) lowest possible cost. A nationwide market study shows there is a defined market opportunity for such a panelized roof system with production and semi-custom builders in the United States. Senior personnel at top builders expressed interest in the performance attributes and indicate long-term opportunity exists if the system can deliver a clear value proposition. Specifically, builders are interested in (1) reducing construction cycle time (cost) and (2) offering increased energy efficiency to the homebuyer. Additional living space under the roof panels is another low-cost asset identified as part of the study. The market potential is enhanced through construction activity levels in target marke

  16. author research productivity: Topics by E-print Network

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

    2007 -Forest industry production Authorities Renewable Energy Websites Summary: FINLAND SOURCES 2007 - Forest industry production Print Home Finland Government Authorities...

  17. archipelago sea finland: Topics by E-print Network

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

    2007 -Forest industry production Authorities Renewable Energy Websites Summary: FINLAND SOURCES 2007 - Forest industry production Print Home Finland Government Authorities...

  18. acid hydrogel carrying: Topics by E-print Network

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

    Materials Science Websites Summary: Keywords: Mesenchymal stem cells Microcontact printing Microenvironment Differentiation Polyacrylamide by studying cells adherent to...

  19. WIDEBAND SLOT AND PRINTED ANTENNAS ATEF Z. ELSHERBENI

    E-Print Network [OSTI]

    Elsherbeni, Atef Z.

    with tuning stubs, bowtie slot antennas with tapered tuning stubs, and microstrip-fed printed bowtie antennas

  20. A QuickStart Guide to printing a

    E-Print Network [OSTI]

    A QuickStart Guide to printing a 3D model starting from a block of bytes Bridget CarragherStart Guide to printing a 3D model starting from a block of bytes This is currently a three step process. (1 and selecting a new size (of 3 inches for example). Once you have done this, choose Print from the File menu

  1. 3D Printing of Functional and Biological Materials

    E-Print Network [OSTI]

    ! 3D Printing of Functional and Biological Materials Jennifer A. Lewis Wyss Professor)! Multimaterial 3D printing ! #12;3D antennas! Li ion microbatteries! Lightweight microlattices!Flexible sensors! 3D Printing of Integrated Electronic Devices ! #12;20 nm average , 5 ­ 50 nm

  2. A quality map of transfer printing Matthew B. Tucker,1

    E-Print Network [OSTI]

    Li, Teng

    - nique to enable a low-cost and scalable roll-to-roll printing process of flexible devices.13­19 Although printing toward a roll-to-roll printing process of flexible devices hinges upon the understanding be fabricated on compliant organic substrates polymers, elastomers , result- ing in lightweight, rugged

  3. The design evaluation of inductive power-transformer for personal rapid transit by measuring impedance

    SciTech Connect (OSTI)

    Han, Kyung-Hee [Department of Electrical Engineering, Dongguk University, Seoul 100-715 (Korea, Republic of); Department of Electricity and Signaling, Korea Railroad Research Institute, Uiwang, Kyonggi 437-050 (Korea, Republic of); Lee, Byung-Song [Department of Electricity and Signaling, Korea Railroad Research Institute, Uiwang, Kyonggi 437-050 (Korea, Republic of); Baek, Soo-Hyun [Department of Electrical Engineering, Dongguk University, Seoul 100-715 (Korea, Republic of)

    2008-04-01T23:59:59.000Z

    The contact-less inductive power transformer (IPT) uses the principle of electromagnetic induction. The concept of the IPT for vehicles such as the personal rapid transit (PRT) system is proposed and some suggestions for power collector design of IPT to improve power transfer performance are presented in this paper. The aim of this paper is to recommend the concept of IPT for vehicles such as the PRT system and also to present some propositions for the power collector design of the IPT, which is to improve the power transfer performance. Generally, there are diverse methods to evaluate transfer performance of the traditional transformers. Although the principle of IPT is similar to that of the general transformer, it is impossible to apply the methods directly because of large air gap. The system must be compensated by resonant circuit due to the large air gap. Consequently, it is difficult to apply numerical formulas to the magnetic design of IPT systems. This paper investigates the magnetic design of a PRT system using three-dimensional magnetic modeling and measurements of the pick-up coupling coefficient and its impedances. In addition, how the use of Litz wire and leakage inductance is related will be observed through experiment and simulation.

  4. Electron transport properties of bis[2-(2-hydroxyphenyl)-pyridine]beryllium investigated by impedance spectroscopy

    SciTech Connect (OSTI)

    Wang, Yanping; Chen, Jiangshan; Huang, Jinying; Ma, Dongge, E-mail: mdg1014@ciac.jl.cn, E-mail: dongls@ciac.jl.cn [State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Changchun 130022 (China); Dong, Lisong, E-mail: mdg1014@ciac.jl.cn, E-mail: dongls@ciac.jl.cn [Key Laboratory of Polymer Ecomaterials, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Changchun 130022 (China); Chen, Hui [Department of Science, Shenyang University of Chemical Technology, Shenyang 110142 (China)

    2014-06-14T23:59:59.000Z

    The electron transport properties of bis[2-(2-hydroxyphenyl)-pyridine] beryllium (Bepp{sub 2}) are investigated by impedance spectroscopy over a frequency range of 10?Hz to 13?MHz. The Cole-Cole plots demonstrate that the Bepp{sub 2}-based device can be represented by a single parallel resistance R{sub p} and capacitance C{sub p} network with a series resistance R{sub s}. The current-voltage characteristics and the variation of R{sub p} with applied bias voltage indicate the electron conduction of space-charge-limited current with exponential trap distributions in Bepp{sub 2}. It can be seen that the electron mobility exhibits strong field-dependence in low electric field region and almost saturate in high electric field region. It is experimentally found that Bepp{sub 2} shows dispersion transport and becomes weak as the electric field increases. The activation energy is determined to be 0.043?eV by temperature-dependent conductivity, which is consistent with the result obtained from the temperature-dependent current density characteristics. The electron mobility reaches the orders of 10{sup ?6}–10{sup ?5} cm{sup 2} V{sup ?1} s{sup ?1}, depending on the electric field.

  5. Thermal Versus Impedance-Based Ablation of Renal Cell Carcinoma: A Meta-analysis

    SciTech Connect (OSTI)

    Modabber, Milad, E-mail: mmodabber@gmail.com; Martin, Jason, E-mail: jason.martin@medportal.ca [McMaster University, DeGroote School of Medicine (Canada); Athreya, Sriharsha, E-mail: sathreya@stjosham.on.ca [McMaster University, Faculty of Health Sciences (Canada)

    2013-10-04T23:59:59.000Z

    BackgroundPercutaneous radiofrequency ablation (RFA) of renal carcinoma has become an established treatment modality. However, thermal (TB) versus impedance-based (IB)-RF generators have not been previously compared.MethodsA literature search on the application of RFA for renal masses using TB or IB-RF generators was performed. The safety, efficacy, and long-term outcomes of TB versus IB-based RFA were assessed using the outcome measures of technical success, local recurrence rate, complications, and preservation of renal function.ResultsAcross the 27 included studies, pooled results suggested comparable results for technical success (TB-RFA 98.53 % vs. IB-RFA 98.78 %, P = 0.9813). Clinical efficacy results were also similar across both generators (91.0 % TB-RFA vs. 91.5 % IB-RFA; P = 0.73). At follow-up, no differences in renal function (relative risk [RR] 0.5, 95 % confidence interval [CI] 0.45–5.48), and local recurrence (RR 0.717, 95 % CI 0.49–1.50) were observed. The pooled proportion of overall complication rates was 13.1 % for TB-RFA and 11.5 % for IB-RFA.ConclusionNo differences in the observed parameters were found either during surgery or at follow-up.

  6. Effects of Operating Conditions on Internal Resistances in Enzyme Fuel Cells Studied via Electrochemical Impedance Spectroscopy

    SciTech Connect (OSTI)

    Aaron, D [Georgia Institute of Technology; Borole, Abhijeet P [ORNL; Yiacoumi, Sotira [Georgia Institute of Technology; Tsouris, Costas [ORNL

    2012-01-01T23:59:59.000Z

    Enzyme fuel cells (EFCs) offer some advantages over traditional precious-metal-catalyzed fuel cells, such as polymer electrolyte membrane fuel cells (PEMFCs). However, EFCs exhibit far less power output than PEMFCs and have relatively short life spans before materials must be replaced. In this work, electrochemical impedance spectroscopy (EIS) is used to analyze the internal resistances throughout the EFC at a variety of operating conditions. EIS analysis is focused primarily on the resistances of the anode, solution/membrane, and cathode. Increased enzyme loading results in improved power output and reductions in internal resistance. Conditions are identified for which enzyme loading does not limit the EFC performance. EIS experiments are also reported for EFCs operated continuously for 2 days; power output declines sharply over time, while all internal resistances increase. Drying of the cathode and enzyme/mediator degradation are believed to have contributed to this behavior. Finally, experiments are performed at varying air-humidification temperatures. Little effect on internal resistances or power output is observed. However, it is anticipated that increased air humidification can improve longevity by delivering more water to the cathode. Improvements to the enzymatic cathode are needed for EFC development. These improvements need to focus on improving transport rather than increasing enzyme loading.

  7. PrintCentreContact the Print Centre for assistance with all your document needs.

    E-Print Network [OSTI]

    Brownstone, Rob

    PrintCentreContact the Print Centre for assistance with all your document needs. Dalhousie We-campus deliveries · Management program for campus multifunction devices (MFDs) We also offer printer and copier Science (BCSc), Bachelor of Informatics (BInf), Bachelor of Management (BMgt) and Bachelor of Science (BSc

  8. Understanding and developing capabilities for large area and continuous micro contact printing

    E-Print Network [OSTI]

    Goel, Ambika

    2007-01-01T23:59:59.000Z

    Micro contact printing is a high spatial resolution-patterning tool that can be used for printing on large and non-planar surfaces because of which it has begun to find important applications in printed organic electronics ...

  9. Print-and-Peel Fabrication for Microfluidics: What’s in it for Biomedical Applications?

    E-Print Network [OSTI]

    Thomas, Marlon S.; Millare, Brent; Clift, Joseph M.; Bao, Duoduo; Hong, Connie; Vullev, Valentine I.

    2010-01-01T23:59:59.000Z

    of direct three-dimensional (3D) printing of masters using ahave the capability for 3D printing, and hence, for directly3D elements allow for achieving fea- tures, demonstrated with solid-object printing,

  10. Print-and-Peel Fabrication for Microfluidics: What’s in it for Biomedical Applications?

    E-Print Network [OSTI]

    Thomas, Marlon S.; Millare, Brent; Clift, Joseph M.; Bao, Duoduo; Hong, Connie; Vullev, Valentine I.

    2010-01-01T23:59:59.000Z

    have the capability for 3D printing, and hence, for directlyof direct three-dimensional (3D) printing of masters using a3D elements allow for achieving fea- tures, demonstrated with solid-object printing,

  11. School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles

    E-Print Network [OSTI]

    Evans, Paul

    School of Art & Design 3D Printing of Relief Forms onto Ceramic Tiles Lead: Lharne Shaw 3D printing tile production. It will also assess the feasibility of introducing a 3D slip printing system into both

  12. Improvement of 3D Printing Resolution by the Development of Shrinkable Materials

    E-Print Network [OSTI]

    Chia, Helena

    2014-01-01T23:59:59.000Z

    learned a lot about 3D printing and myself in this processderived microstructures by 3D printing: bio-and structuralScaffold development using 3D printing with a starch-based

  13. Evaluation of PC-ISO for customized, 3D printed, gynecologic 192Ir HDR brachytherapy applicators

    E-Print Network [OSTI]

    2015-01-01T23:59:59.000Z

    A, Iuliano L, Violante MG. 3D printing technique applied toTengg-Kobligk H, et al. 3D printing based on imaging data:biocompatible, sterilizable 3D printing material, and its

  14. Improvement of 3D Printing Resolution by the Development of Shrinkable Materials

    E-Print Network [OSTI]

    Chia, Helena

    2014-01-01T23:59:59.000Z

    derived microstructures by 3D printing: bio-and structuralScaffold development using 3D printing with a starch-basedderived microstructures by 3D printing: bio-and structural

  15. In Situ X-Ray Scattering Helps Optimize Printed Solar Cells

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

    In Situ X-Ray Scattering Helps Optimize Printed Solar Cells In Situ X-Ray Scattering Helps Optimize Printed Solar Cells Print Wednesday, 25 February 2015 00:00 Plastic solar cells...

  16. amoxicillin: Topics by E-print Network

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

    to carefully balance potential risks Ral J. Andrade; Paul M. Tulkens 14 Printed in Croatia CiteSeer Summary: The incidence of Salmonella in dogs was investigated to assess the...

  17. albumen: Topics by E-print Network

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

    1840-1895. Bibliography: p. 1. Photography--Printing processes. 2. Albumen James M. Reilly; For Linda; James M; Henry Peach Robinson 1840-01-01 5 TheJournalofExperimentalBiology...

  18. Digital imaging tracing technology for print media

    E-Print Network [OSTI]

    Milne, Stewart William

    1997-01-01T23:59:59.000Z

    This thesis examines and analyzes the existing state of digital technology use in print media and the attitudes of those using the technology to develop a technology that would help prevent the unethical manipulation of images in mass media...

  19. arkansas: Topics by E-print Network

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

    conversations with volunteer amateur radio operators, members of the print and broadcast media in Ft. Smith to the U.S. Congress, to local government officials in Ft. Smith and...

  20. Printed on recycled paper. 2013 Cornell Waste

    E-Print Network [OSTI]

    Chen, Tsuhan

    management by focusing University resources and capabilities on this pressing economic, environmental of waste generation and composition, waste reduction, risk management, environmental equity and publicPrinted on recycled paper. 2013 Cornell Waste Management Institute CWMI is a program

  1. Energy Efficiency Indicators Methodology Booklet

    E-Print Network [OSTI]

    Sathaye, Jayant

    2010-01-01T23:59:59.000Z

    Tracking Industrial Eneergy Efficiency and Co2 Emissions”.2000 NRCAN, 2006. Energy Efficiency Trends in Canada 1990 toCanada’s Office of Energy Efficiency, Ottawa. NRCAN, 2009.

  2. Review: 3D Printing: Social and Cultural Trajectories Symposium -3D Printing Industry http://3dprintingindustry.com/2013/12/11/review-3d-printing-social-cultural-trajectories-symposium/[12/12/2013 11:25:00 AM

    E-Print Network [OSTI]

    Review: 3D Printing: Social and Cultural Trajectories Symposium - 3D Printing Industry http://3dprintingindustry.com/2013/12/11/review-3d-printing-social-cultural-trajectories-symposium/[12/12/2013 11:25:00 AM] Review: 3D Printing: Social and Cultural Trajectories Symposium BY ANGELA DALY & DARCY ALLEN ON WED

  3. Printed Name: Page 1 of 6

    E-Print Network [OSTI]

    Walba, David

    print your name on each page of the exam. H He Li Be B C N O F Na Mg Al Si P S Ne Cl Ar Br I 1 2 3 4 5 6Printed Name: Page 1 of 6 CHEM 3311-100, Fall 2013 Professor Walba First Hour Exam September 24: ________________________________ Recitation day and time: _____________________________ This is a closed-book exam. The use of notes

  4. Printed Name: Page 1 of 7

    E-Print Network [OSTI]

    Walba, David

    print your name on each page of the exam. H He Li Be B C N O F Na Mg Al Si P S Ne Cl Ar Br I 1 2 3 4 5 6Printed Name: Page 1 of 7 CHEM 3311-100, Fall 2013 Professor Walba Second Hour Exam October 22: ________________________________ Recitation day and time: _____________________________ This is a closed-book exam. The use of notes

  5. Printed Name: Page 1 of 8

    E-Print Network [OSTI]

    Walba, David

    print your name on each page of the exam. H He Li Be B C N O F Na Mg Al Si P S Ne Cl Ar Br I 1 2 3 4 5 6Printed Name: Page 1 of 8 CHEM 3311-100, Fall 2013 Professor Walba Third Hour Exam November 19: ________________________________ Recitation day and time: _____________________________ This is a closed-book exam. The use of notes

  6. Printed Name: Page 1 of 9

    E-Print Network [OSTI]

    Walba, David

    print your name on each page of the exam. H He Li Be B C N O F Na Mg Al Si P S Ne Cl Ar Br I 1 2 3 4 5 6Printed Name: Page 1 of 9 CHEM 3311 (300), Fall 2014 Professor Walba Third Hour Exam November 18: _____________________________ Recitation day and time: __________________________ This is a closed-book exam. The use of notes, calculators

  7. Resolving Losses at the Negative Electrode in All-Vanadium Redox Flow Batteries Using Electrochemical Impedance Spectroscopy

    SciTech Connect (OSTI)

    Sun, Che Nan [ORNL] [ORNL; Delnick, Frank M [ORNL] [ORNL; Aaron, D [University of Tennessee, Knoxville (UTK)] [University of Tennessee, Knoxville (UTK); Mench, Matthew M [ORNL] [ORNL; Zawodzinski, Thomas A [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    We present an in situ electrochemical technique for the quantitative measurement and resolution of the ohmic, charge transfer and diffusion overvoltages at the negative electrode of an all-vanadium redox flow battery (VRFB) using electrochemical impedance spectroscopy (EIS). The mathematics describing the complex impedance of the V+2/V+3 redox reaction is derived and matches the experimental data. The voltage losses contributed by each process have been resolved and quantified at various flow rates and electrode thicknesses as a function of current density during anodic and cathodic polarization. The diffusion overvoltage was affected strongly by flow rate while the charge transfer and ohmic losses were invariant. On the other hand, adopting a thicker electrode significantly changed both the charge transfer and diffusion losses due to increased surface area. Furthermore, the Tafel plot obtained from the impedance resolved charge transfer overvoltage yielded the geometric exchange current density, anodic and cathodic Tafel slopes (135 5 and 121 5 mV/decade respectively) and corresponding transfer coefficients = 0.45 0.02 and = 0.50 0.02 in an operating cell.

  8. Motivation for Impedance Control of a Pneumatic Actuator Industrial robots are good at tasks like welding or spray painting, which involve

    E-Print Network [OSTI]

    Barth, Eric J.

    Motivation for Impedance Control of a Pneumatic Actuator Problem Industrial robots are good industrial robot actuators (hydraulic and motor/gearhead systems) are highly stiff system and are better

  9. Energy Efficiency: A Priority 

    E-Print Network [OSTI]

    Patenaude, R.

    2013-01-01T23:59:59.000Z

    Energy Efficiency: A Priority October 9th 2013 2 Energy efficiency: a priority NBC profile (April 30th, 2013) 1st financial institution in Quebec 19 920 employees 451 branches in Canada 2,4 million individual clients 3 Energy efficiency: a... priority Energenia?s profile Consulting firm specializing exclusively in energy efficency Founded by Robert Patenaude in 2003 National Bank?s main partner for the development, implementation and supervision of the energy efficiciency program since...

  10. Energy Efficiency: A Priority

    E-Print Network [OSTI]

    Patenaude, R.

    2013-01-01T23:59:59.000Z

    Energy Efficiency: A Priority October 9th 2013 2 Energy efficiency: a priority NBC profile (April 30th, 2013) 1st financial institution in Quebec 19 920 employees 451 branches in Canada 2,4 million individual clients 3 Energy efficiency: a... priority Energenia?s profile Consulting firm specializing exclusively in energy efficency Founded by Robert Patenaude in 2003 National Bank?s main partner for the development, implementation and supervision of the energy efficiciency program since...

  11. Bearwall Energy Efficient Solutions

    E-Print Network [OSTI]

    Sovero,M.

    2014-01-01T23:59:59.000Z

    CATEE Conference November 20, 2014 ENERGY EFFICIENT SOLUTIONS ESL-KT-14-11-06 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Brief History of Bearwall… Who We Are: ? Manuel Sovero ? Luis Osorio Energy Conservation... Experience: ESL-KT-14-11-06 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Energy Programs… ESL-KT-14-11-06 CATEE 2014: Clean Air Through Efficiency Conference, Dallas, Texas Nov. 18-20 Bearwall Methodology… Introduction...

  12. Appliance Efficiency Regulations

    Broader source: Energy.gov [DOE]

    Note: The federal government has imposed and updated appliance efficiency standards through several legislative acts,* and now has standards in place or under development for 30 classes of...

  13. Energy Efficiency Links

    U.S. Energy Information Administration (EIA) Indexed Site

    to research, develop, and use advanced energy efficiency, renewable energy, pollution prevention technologies for industrial customers. The site includes information on...

  14. Energy Efficiency Product Standards

    Broader source: Energy.gov [DOE]

    '' Note: The federal government has imposed and updated appliance efficiency standards through several legislative acts,* and now has standards in place or under development for 30 classes of...

  15. Efficient Water Use & Management

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

    Water Use Goal 4: Efficient Water Use & Management Aware of the arid climate of northern New Mexico, water reduction and conservation remains a primary concern at LANL. Energy...

  16. Efficiency Maine Trust

    Broader source: Energy.gov [DOE]

    Maine's public benefits fund for energy efficiency was authorized originally in 1997 by the state's electric-industry restructuring legislation. Under the initial arrangement, the administration of...

  17. Energy Efficiency Fund

    Broader source: Energy.gov [DOE]

    Connecticut's original electric-industry restructuring legislation (Public Act 98-28), enacted in April 1998, created separate funds to support energy efficiency and renewable energy.* The...

  18. An Algorithm for Computing Customized 3D Printed Implants with Curvature Constrained Channels for Enhancing

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    An Algorithm for Computing Customized 3D Printed Implants with Curvature Constrained Channels results in 3D printing and steerable needle motion planning to create customized implants containing

  19. Print-and-Peel Fabrication for Microfluidics: What’s in it for Biomedical Applications?

    E-Print Network [OSTI]

    Thomas, Marlon S.; Millare, Brent; Clift, Joseph M.; Bao, Duoduo; Hong, Connie; Vullev, Valentine I.

    2010-01-01T23:59:59.000Z

    of direct three-dimensional (3D) printing of masters using ahave the capability for 3D printing, and hence, for directly

  20. aligned single-walled carbon: Topics by E-print Network

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

    Page Topic Index 1 Printed Multilayer Superstructures of Aligned Single-Walled Carbon Materials Science Websites Summary: Printed Multilayer Superstructures of Aligned...

  1. The Future of Manufacturing Takes Shape: 3D Printed Car on Display...

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

    Lead, Advanced Manufacturing Office Additive manufacturing - often referred to as 3D printing - is a revolutionary way to design and build products. Until now, 3D printing has...

  2. PROGRESS IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Wall, L.W.

    2009-01-01T23:59:59.000Z

    the case for building energy-efficiency labels. 3.1 Trendsenergy efficiency. Building energy efficiency labels are anThe use of building energy efficiency labels may be the

  3. Printed circuit dispersive transmission line

    DOE Patents [OSTI]

    Ikezi, H.; Lin-Liu, Y.R.; DeGrassie, J.S.

    1991-08-27T23:59:59.000Z

    A printed circuit dispersive transmission line structure is disclosed comprising an insulator, a ground plane formed on one surface of the insulator, a first transmission line formed on a second surface of the insulator, and a second transmission line also formed on the second surface of the insulator and of longer length than the first transmission line and periodically intersecting the first transmission line. In a preferred embodiment, the transmission line structure exhibits highly dispersive characteristics by designing the length of one of the transmission line between two adjacent periodic intersections to be longer than the other. 5 figures.

  4. Notice of Intent to Develop DOE Guide 436.1-1, Sustainable Print Management

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

    2015-03-19T23:59:59.000Z

    The Guide will support Executive Order (E.O.) 13693, Planning for Federal Sustainability in the Next Decade. signed on March 19, 2015, which requires the Federal Government to lead by example to create a clean energy economy that will increase prosperity, promote energy security, protect the interests of taxpayers, and safeguard the health of the environment. Under E.O. 13693, Federal agencies are required to increase energy efficiency, eliminate waste, and leverage agency acquisitions by reducing costs and resources in their printing activities. This Guide also aligns with the requirements of DOE O 436.1, Departmental Sustainability.

  5. Fabrication of masters for microfluidic devices using conventional printed circuit technology

    E-Print Network [OSTI]

    Sudarsan, Arjun Penubolu

    2004-09-30T23:59:59.000Z

    is not hydroscopic and does not swell with humidity b) PDMS is elastic and provides a surface that has low interfacial free energy (~21.6 dyn/cm) with good chemical stability. Most molecules or polymers being patterned or molded do not adhere irreversibly... that are of extreme importance. The main objective of this research is to address this difficulty by demonstrating that master molds can be constructed using presenstitized printed circuit boards (PC boards) in a fast and efficient way so that PDMS (and other plastic...

  6. Notice of Intent to Develop DOE G 436.1-1, Sustainable Print Management

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

    2015-03-19T23:59:59.000Z

    The Guide will support Executive Order (E.O.) 13693, Planning for Federal Sustainability in the Next Decade. signed on March 19, 2015, which requires the Federal Government to lead by example to create a clean energy economy that will increase prosperity, promote energy security, protect the interests of taxpayers, and safeguard the health of the environment. Under E.O. 13693, Federal agencies are required to increase energy efficiency, eliminate waste, and leverage agency acquisitions by reducing costs and resources in their printing activities. This Guide also aligns with the requirements of DOE O 436.1, Departmental Sustainability.

  7. ac power flow: Topics by E-print Network

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

    are observed. 2. The package thermal impedance Kretchmar, R. Matthew 266 Nuclear Power Plant Design Project Fission and Nuclear Technologies Websites Summary: Nuclear Power Plant...

  8. alcohol fiber reinforced: Topics by E-print Network

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

    AND SHM OF CARBON FIBER REINFORCED POLYMER PART I : IMPEDANCE ANALYSIS-performance composite materials based on carbon fiber are increasingly used in critical security areas...

  9. acid doped polybenzimidazole: Topics by E-print Network

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

    Arayaa , Sren without the need for break in. Keywords: High temperature PEM fuel cell; Impedance spectroscopy; Break in- brane (HTPEM) fuel cells based on phosphoric acid...

  10. active carbon process: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  11. activated carbon produced: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  12. active carbon stocks: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  13. activity carbon intensity: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  14. activated carbon comparison: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  15. active carbon adsorption: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  16. activated carbon supported: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  17. activated carbon: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  18. activated carbon filtration: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  19. activated carbon bed: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  20. active carbons derived: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  1. activated mineral carbon: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  2. activated carbon products: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  3. activated carbon gac: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  4. activated carbon columns: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  5. activated carbon addition: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  6. activated carbons produced: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  7. activated carbon effect: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  8. activated carbon process: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  9. activated carbon derived: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  10. activated carbon pac: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  11. activated carbon injection: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  12. activated carbon cloth: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  13. activities carbonic anhydrase: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  14. activated carbon treated: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  15. activated carbon based: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  16. activated carbon fixed: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  17. activated carbon particles: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  18. activated carbon adsorption: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  19. activated carbons derived: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  20. activated carbon surface: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  1. activated carbon production: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  2. activated carbons production: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  3. activated carbon sorcion: Topics by E-print Network

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

    Blackhawk Road, APG, MD USA 21010 ABSTRACT The impregnated active carbon in active carbon filters by combining the electromechanical impedance spectroscopy (EMIS Giurgiutiu, Victor...

  4. The Efficient Windows Collaborative

    SciTech Connect (OSTI)

    Petermann, Nils

    2006-03-31T23:59:59.000Z

    The Efficient Windows Collaborative (EWC) is a coalition of manufacturers, component suppliers, government agencies, research institutions, and others who partner to expand the market for energy efficient window products. Funded through a cooperative agreement with the U.S. Department of Energy, the EWC provides education, communication and outreach in order to transform the residential window market to 70% energy efficient products by 2005. Implementation of the EWC is managed by the Alliance to Save Energy, with support from the University of Minnesota and Lawrence Berkeley National Laboratory.

  5. Efficiently Controllable Graphs

    E-Print Network [OSTI]

    Can Gokler; Kevin Thompson; Peter Shor; Seth Lloyd

    2015-03-18T23:59:59.000Z

    We show that universal quantum computation can be performed efficiently on quantum networks while the fraction of controlled subsystems vanishes as the network grows larger. We provide examples of quantum spin network families admitting polynomial quantum gate complexity with a vanishing fraction of controlled spins. We define a new family of graphs, the efficiently controllable family, which admits efficient computation with vanishing fraction of controls. We explore generalizations to percolation clusters, fractals and random graphs. We show that the classical computational complexity of estimating the ground state of Hamiltonians described by controllable graphs is polynomial in the number of subsystems/qubits.

  6. Premium Efficient Motors

    E-Print Network [OSTI]

    Moser, P. R.

    1984-01-01T23:59:59.000Z

    Premium efficient motors are available which convert electrical energy into mechanical energy with fewer losses than the more standard motors. The fewer losses in these motors are due to changes in the motor design and improved manufacturing methods...

  7. Energy Efficiency Resource Standard

    Broader source: Energy.gov [DOE]

    The California Legislature emphasized the importance of energy efficiency and established broad goals with the enactment of Assembly Bill 2021 of 2006. The bill calls for a 10% reduction in forec...

  8. Improving Fired Heater Efficiency 

    E-Print Network [OSTI]

    Shriver, J. E.

    1983-01-01T23:59:59.000Z

    1982. 2, Fehervari, Willi, "Gas Measurement and Control for Pipeline Systems," The Foxboro Company. 3. Shriver, James, "CO/02 Boiler Control: Point Is Vi tal," POWER, October 1982. Set 1\\. Dukelow, Samuel, "Improving Boiler Efficiency...

  9. Energy Efficiency Resource Standard

    Broader source: Energy.gov [DOE]

    The California Legislature emphasized the importance of energy efficiency and established broad goals with the enactment of [http://docs.cpuc.ca.gov/word_pdf/FINAL_DECISION/85995.pdf Assembly Bill...

  10. Compressed Air Supply Efficiency 

    E-Print Network [OSTI]

    Joseph, B.

    2004-01-01T23:59:59.000Z

    COMPRESSED AIR SUPPLY EFFICENCY Babu Joseph, Ph.D., P.E. Engineer Southern California Edison Irwindale, CA ABSTRACT This project, under contract from California Energy Commission, developed the CASE (Compressed Air Supply Efficiency...

  11. Study of corrosion of super martensitic stainless steel under alternating current in artificial seawater with electrochemical impedance spectroscopy

    SciTech Connect (OSTI)

    Reyes, T.; Bhola, S.; Olson, D. L.; Mishra, B. [Colorado School of Mines, Golden CO 80401 (United States)

    2011-06-23T23:59:59.000Z

    The assessment of corrosion requires the use of tools able to quantify the corrosion but often times also qualify it. Electrochemical Impedance Spectroscopy (EIS) is a laboratory tool that can provide both qualification and quantification of corrosion. EIS was successfully used to compare the thickness of the corrosion products formed during the application of different alternating current (AC) densities as well as to characterize pitting. When EIS is applied at the open circuit potential, the technique is nondestructive and predicts the corrosion behavior of the electrode. It can also be used at cathodic potentials while still being nondestructive, providing information about the electrode reaction kinetics, diffusion and electrical double layer.

  12. Efficient Windows Collaborative

    SciTech Connect (OSTI)

    Nils Petermann

    2010-02-28T23:59:59.000Z

    The project goals covered both the residential and commercial windows markets and involved a range of audiences such as window manufacturers, builders, homeowners, design professionals, utilities, and public agencies. Essential goals included: (1) Creation of 'Master Toolkits' of information that integrate diverse tools, rating systems, and incentive programs, customized for key audiences such as window manufacturers, design professionals, and utility programs. (2) Delivery of education and outreach programs to multiple audiences through conference presentations, publication of articles for builders and other industry professionals, and targeted dissemination of efficient window curricula to professionals and students. (3) Design and implementation of mechanisms to encourage and track sales of more efficient products through the existing Window Products Database as an incentive for manufacturers to improve products and participate in programs such as NFRC and ENERGY STAR. (4) Development of utility incentive programs to promote more efficient residential and commercial windows. Partnership with regional and local entities on the development of programs and customized information to move the market toward the highest performing products. An overarching project goal was to ensure that different audiences adopt and use the developed information, design and promotion tools and thus increase the market penetration of energy efficient fenestration products. In particular, a crucial success criterion was to move gas and electric utilities to increase the promotion of energy efficient windows through demand side management programs as an important step toward increasing the market share of energy efficient windows.

  13. Energy Efficiency Upgrades

    SciTech Connect (OSTI)

    Roby Williams

    2012-03-29T23:59:59.000Z

    The energy efficiency upgrades project at Hardin County General Hospital did not include research nor was it a demonstration project. The project enabled the hospital to replace outdated systems with modern efficient models. Hardin County General Hospital is a 501c3, nonprofit hospital and the sole community provider for Hardin and Pope Counties of Illinois. This project provided much needed equipment and facility upgrades that would not have been possible through locally generated funding. Task 1 was a reroofing of the hospital. The hospital architect designed the replacement to increase the energy efficiency of the hospital roof/ceiling structure. Task 2 was replacement and installation of a new more efficient CT scanner for the hospital. Included in the project was replacement of HVAC equipment for the entire radiological suite. Task 5 was a replacement and installation of a new higher capacity diesel-fueled emergency generator for the hospital replacing a 50+ year old gas-fired generator. Task 7 was the replacement of 50+ year-old walk-in cooler/freezer with a newer, energy efficient model. Task 8 was the replacement of 10+ year-old washing machines in the hospital laundry with higher capacity, energy efficient models. Task 9 was replacement of 50-year old single pane curtain window system with double-pane insulated windows. Additionally, insulation was added around ventilation systems and the curtain wall system.

  14. A method for dating early books and prints using image analysis

    E-Print Network [OSTI]

    Hedges, Blair

    by Rembrandt (Ash & Fletcher 1998) and Shakespeare (Hunter 2001). Occasionally, marks in prints that resulted

  15. Hot Melt Inks for 3D Printing Veronika Chovancova*, Alexandra Pekarovicova* and Paul D. Fleming III

    E-Print Network [OSTI]

    Fleming, Paul D. "Dan"

    Hot Melt Inks for 3D Printing Veronika Chovancova*, Alexandra Pekarovicova* and Paul D. Fleming III for 3D printing comprises different waxes, tackifier and plasticizer resins, rheology modifiers, and UV rheological (or flow) behavior. 1 3D printing, direct ink-jet printing, and related approaches such as hot

  16. Eco-efficiency Indicators: Measuring Resource-use Efficiency...

    Open Energy Info (EERE)

    efficiency Indicators: Measuring Resource-use Efficiency and the Impact of Economic Activities on the Environment Jump to: navigation, search Tool Summary LAUNCH TOOL Name:...

  17. High Efficiency, Clean Combustion

    SciTech Connect (OSTI)

    Donald Stanton

    2010-03-31T23:59:59.000Z

    Energy use in trucks has been increasing at a faster rate than that of automobiles within the U.S. transportation sector. According to the Energy Information Administration (EIA) Annual Energy Outlook (AEO), a 23% increase in fuel consumption for the U.S. heavy duty truck segment is expected between 2009 to 2020. The heavy duty vehicle oil consumption is projected to grow between 2009 and 2050 while light duty vehicle (LDV) fuel consumption will eventually experience a decrease. By 2050, the oil consumption rate by LDVs is anticipated to decrease below 2009 levels due to CAFE standards and biofuel use. In contrast, the heavy duty oil consumption rate is anticipated to double. The increasing trend in oil consumption for heavy trucks is linked to the vitality, security, and growth of the U.S. economy. An essential part of a stable and vibrant U.S. economy is a productive U.S. trucking industry. Studies have shown that the U.S. gross domestic product (GDP) is strongly correlated to freight transport. Over 90% of all U.S. freight tonnage is transported by diesel power and over 75% is transported by trucks. Given the vital role that the trucking industry plays in the economy, improving the efficiency of the transportation of goods was a central focus of the Cummins High Efficient Clean Combustion (HECC) program. In a commercial vehicle, the diesel engine remains the largest source of fuel efficiency loss, but remains the greatest opportunity for fuel efficiency improvements. In addition to reducing oil consumption and the dependency on foreign oil, this project will mitigate the impact on the environment by meeting US EPA 2010 emissions regulations. Innovation is a key element in sustaining a U.S. trucking industry that is competitive in global markets. Unlike passenger vehicles, the trucking industry cannot simply downsize the vehicle and still transport the freight with improved efficiency. The truck manufacturing and supporting industries are faced with numerous challenges to reduce oil consumption and greenhouse gases, meet stringent emissions regulations, provide customer value, and improve safety. The HECC program successfully reduced engine fuel consumption and greenhouse gases while providing greater customer valve. The US EPA 2010 emissions standard poses a significant challenge for developing clean diesel powertrains that meet the DoE Vehicle Technologies Multi-Year Program Plan (MYPP) for fuel efficiency improvement while remaining affordable. Along with exhaust emissions, an emphasis on heavy duty vehicle fuel efficiency is being driven by increased energy costs as well as the potential regulation of greenhouse gases. An important element of the success of meeting emissions while significantly improving efficiency is leveraging Cummins component technologies such as fuel injection equipment, aftertreatment, turbomahcinery, electronic controls, and combustion systems. Innovation in component technology coupled with system integration is enabling Cummins to move forward with the development of high efficiency clean diesel products with a long term goal of reaching a 55% peak brake thermal efficiency for the engine plus aftertreatment system. The first step in developing high efficiency clean products has been supported by the DoE co-sponsored HECC program. The objectives of the HECC program are: (1) To design and develop advanced diesel engine architectures capable of achieving US EPA 2010 emission regulations while improving the brake thermal efficiency by 10% compared to the baseline (a state of the art 2007 production diesel engine). (2) To design and develop components and subsystems (fuel systems, air handling, controls, etc) to enable construction and development of multi-cylinder engines. (3) To perform an assessment of the commercial viability of the newly developed engine technology. (4) To specify fuel properties conducive to improvements in emissions, reliability, and fuel efficiency for engines using high-efficiency clean combustion (HECC) technologies. To demonstrate the technology is compatible with B2

  18. PROGRESS IN ENERGY EFFICIENT BUILDINGS

    E-Print Network [OSTI]

    Wall, L.W.

    2009-01-01T23:59:59.000Z

    Seven recent energy-efficient U.S. office buildings areSeven recent energy-efficient U.S. office buildings are18, 1983. PROGRESS IN ENERGY EFFICIENT BUILDINGS Leonard W.

  19. Sandia Energy - Enabling Energy Efficiency

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

    Enabling Energy Efficiency Home Energy Research EFRCs Solid-State Lighting Science EFRC Enabling Energy Efficiency Enabling Energy EfficiencyTara Camacho-Lopez2015-03-26T16:33:50+0...

  20. Energy Efficiency Indicators Methodology Booklet

    E-Print Network [OSTI]

    Sathaye, Jayant

    2010-01-01T23:59:59.000Z

    2000 NRCAN, 2006. Energy Efficiency Trends in Canada 1990 toResources Canada’s Office of Energy Efficiency, Ottawa.NRCAN, 2009. Energy Efficiency Trends in Canada 1990 to