Sample records for momentary contact switch

  1. Electrical contact resistance degradation of a hot-switched simulated metal MEMS contact.

    SciTech Connect (OSTI)

    Dugger, Michael Thomas; Dickrell, Daniel John, III

    2005-03-01T23:59:59.000Z

    Electrical contact resistance testing was performed by hot-switching a simulated gold-platinum metal microelectromechanical systems contact. The experimental objective was to determine the sensitivity of the contact resistance degradation to current level and environment. The contact resistance increased sharply after 100 hot-switched cycles in air. Hot-switching at a reduced current and in nitrogen atmosphere curtailed contact resistance degradation by several orders of magnitude. The mechanism responsible for the resistance degradation was found to be arc-induced decomposition of adsorbed surface contaminants.

  2. Switch-reference and Omotic-Cushitic Language Contact in Southwest Ethiopia Yvonne Treis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Switch-reference and Omotic-Cushitic Language Contact in Southwest Ethiopia Yvonne Treis LLACAN. This study shows that there is a confined area in the South of Ethiopia where many Omotic languages and a few (Cushitic) and gives an overview of the distribution of switch-reference systems in Ethiopia in general

  3. PERSPECTIVES Nano-to-Microscale Mechanical Switches and Fuses Mediate Adhesive Contacts between

    E-Print Network [OSTI]

    Heinrich, Volkmar

    PERSPECTIVES Nano-to-Microscale Mechanical Switches and Fuses Mediate Adhesive Contacts between to their molecular origins. The present work focuses on nano-to-microscale regulatory aspects that mediate and that they had to be primarily mechanical. Accordingly, our experimental approach was to study in vitro the nano

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

    DOE Patents [OSTI]

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

    2005-01-04T23:59:59.000Z

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

  5. Low frequency noise in the unstable contact region of Au-to-Au microcontact for microelectromechanical system switches

    SciTech Connect (OSTI)

    Qiu, Haodong; Wang, Hong, E-mail: ewanghong@ntu.edu.sg [NOVITAS, Nanoelectronics Centre of Excellence, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798 (Singapore); Ke, Feixiang [Temasek Laboratories at Nanyang Technological University, Research Techno Plaza, Singapore 637553 (Singapore)

    2014-06-23T23:59:59.000Z

    The noise behavior of Au-to-Au microcontact for microelectromechanical system switches has been experimentally studied in the unstable contact region. The results suggest that the electrical conduction remains nonmetallic at the initial stage during contact formation due to the existence of alien films, and traps in the alien layer located at the contact interface could play an important role in determining the conduction noise. The conduction fluctuation induced by electron trapping-detrapping associated with the hydrocarbon layer is found to be an intrinsic noise source contributing to the low frequency noise in the unstable contact region.

  6. MEMS relays for make-break power switching applications : {111} silicon etched planar electrical contacts

    E-Print Network [OSTI]

    Weber, Alexis Christian, 1974-

    2008-01-01T23:59:59.000Z

    Relays and switches are of interest in applications such as test equipment, radar, communications, and power systems, amongst others. Unlike solid state switches, mechanical relays provide galvanic isolation across the ...

  7. Multi-physical characterization of micro-contact materials for MEMS switches

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    on an innovative methodology early developed at NOVA MEMS is hereby presented. The technique exploits a commercial pairs of soft material (Au/Au contact), harder materials (Ru/Ru and Rh/Rh contacts) and mixed-reliability level required for further integration of these technologies in complex systems is currently a major

  8. Contacts

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    Contacts Contacts Bradbury Science Museum P.O. Box 1663 Mail Stop C330 Los Alamos National Laboratory Los Alamos, NM 87545 email: web-bsm@lanl.gov PHONE: 505-667-4444 FAX:...

  9. Contacts

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    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws |Contact Us ContactNathan HowardContacts

  10. Parylene-based active micro space radiator with thermal contact switch

    SciTech Connect (OSTI)

    Ueno, Ai; Suzuki, Yuji [Department of Mechanical Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)

    2014-03-03T23:59:59.000Z

    Thermal management is crucial for highly functional spacecrafts exposed to large fluctuations of internal heat dissipation and/or thermal boundary conditions. Since thermal radiation is the only means for heat removal, effective control of radiation is required for advanced space missions. In the present study, a MEMS (Micro Electro Mechanical Systems) active radiator using the contact resistance change has been proposed. Unlike previous bulky thermal louvers/shutters, higher fill factor can be accomplished with an array of electrostatically driven micro diaphragms suspended with polymer tethers. With an early prototype developed with parylene MEMS technologies, radiation heat flux enhancement up to 42% has been achieved.

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  16. Switch Switch

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    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 InstagramStructureProposed Action Title:SustainableDepartment ofSwitch Switch

  17. Design, fabrication and testing of a lateral self-cleaning MEMS switch

    E-Print Network [OSTI]

    Shi, Yong, 1965-

    2004-01-01T23:59:59.000Z

    A lateral contact MEMS switch has been developed to address the need for a long life cycle, low contact resistance RF switch. At the present time, there is no commercial MEMS switch that meets all the requirements. The ...

  18. IP SwitchingIP Switching and Label Switchingand Label Switching

    E-Print Network [OSTI]

    Jain, Raj

    Raj Jain 1 IP SwitchingIP Switching and Label Switchingand Label Switching Raj Jain Professor Switching vs routing q IP Switching (Ipsilon) q Tag Switching (CISCO) q Multi-protocol label switching a tag. Exit router strips it off. H R R R H H HUntagged Packet Tagged packet #12;Raj Jain 9 Tag

  19. Silicone oil contamination and electrical contact resistance degradation of low-force gold contacts.

    SciTech Connect (OSTI)

    Dugger, Michael Thomas; Dickrell, Daniel John, III

    2006-02-01T23:59:59.000Z

    Hot-switched low-force gold electrical contact testing was performed using a nanomechanical test apparatus to ascertain the sensitivity of simulated microelectromechanical systems (MEMS) contact to silicone oil contamination. The observed cyclic contact resistance degradation was dependent on both closure rate and noncontact applied voltage. The decomposition of silicone oil from electrical arcing was hypothesized as the degradation mechanism.

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    Contact us Participate with us Participate Become a Volunteer Share Your Stories Museum Fan Downloads Q&A Blog Contact us invisible utility element Contact us We want to hear from...

  1. Optical switch

    DOE Patents [OSTI]

    Reedy, R.P.

    1987-11-10T23:59:59.000Z

    An optical switching device is provided whereby light from a first glass fiber or a second glass fiber may be selectively transmitted into a third glass fiber. Each glass fiber is provided with a focusing and collimating lens system. In one mode of operation, light from the first glass fiber is reflected by a planar mirror into the third glass fiber. In another mode of operation, light from the second glass fiber passes directly into the third glass fiber. The planar mirror is attached to a rotatable table which is rotated to provide the optical switching. 3 figs.

  2. Switching it up | EMSL

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

    Switching it up Switching it up Released: March 23, 2015 Mapping redox switches in cyanobacteria advances use as biofuel Scientist mapped more than 2,100 sites that may switch...

  3. Advanced Soft Switching Inverter for Reducing Switching and Power...

    Energy Savers [EERE]

    Soft Switching Inverter for Reducing Switching and Power Losses Advanced Soft Switching Inverter for Reducing Switching and Power Losses Presentation from the U.S. DOE Office of...

  4. All graphene electromechanical switch fabricated by chemical vapor deposition

    E-Print Network [OSTI]

    Milaninia, Kaveh M.

    We demonstrate an electromechanical switch comprising two polycrystalline graphene films; each deposited using ambient pressure chemical vapor deposition. The top film is pulled into electrical contact with the bottom film ...

  5. Multi-line triggering and interdigitated electrode structure for photoconductive semiconductor switches

    DOE Patents [OSTI]

    Mar, Alan (Albuquerque, NM); Zutavern, Fred J. (Albuquerque, NM); Loubriel, Guillermo (Albuquerque, NM)

    2007-02-06T23:59:59.000Z

    An improved photoconductive semiconductor switch comprises multiple-line optical triggering of multiple, high-current parallel filaments between the switch electrodes. The switch can also have a multi-gap, interdigitated electrode for the generation of additional parallel filaments. Multi-line triggering can increase the switch lifetime at high currents by increasing the number of current filaments and reducing the current density at the contact electrodes in a controlled manner. Furthermore, the improved switch can mitigate the degradation of switching conditions with increased number of firings of the switch.

  6. Radiation hard vacuum switch

    DOE Patents [OSTI]

    Boettcher, Gordon E. (Albuquerque, NM)

    1990-01-01T23:59:59.000Z

    A vacuum switch with an isolated trigger probe which is not directly connected to the switching electrodes. The vacuum switch within the plasmatron is triggered by plasma expansion initiated by the trigger probe which travels through an opening to reach the vacuum switch elements. The plasma arc created is directed by the opening to the space between the anode and cathode of the vacuum switch to cause conduction.

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  9. Electro-mechanical heat switch for cryogenic applications

    DOE Patents [OSTI]

    van den Berg, Marcel L. (Oakland, CA); Batteux, Jan D. (Hayward, CA); Labov, Simon E. (Berkeley, CA)

    2003-01-01T23:59:59.000Z

    A heat switch includes two symmetric jaws. Each jaw is comprised of a link connected at a translatable joint to a flexible arm. Each arm rotates about a fixed pivot, and has an articulated end including a thermal contact pad connected to a heat sink. The links are joined together at a translatable main joint. To close the heat switch, a closing solenoid is actuated and forces the main joint to an over-center position. This movement rotates the arms about their pivots, respectively, forces each of them into a stressed configuration, and forces the thermal contact pads towards each other and into compressive contact with a cold finger. The closing solenoid is then deactivated. The heat switch remains closed due to a restoring force generated by the stressed configuration of each arm, until actuation of an opening solenoid returns the main joint to its starting open-switch position.

  10. Laser-triggered vacuum switch

    DOE Patents [OSTI]

    Brannon, Paul J. (Albuquerque, NM); Cowgill, Donald F. (Danville, CA)

    1990-01-01T23:59:59.000Z

    A laser-triggered vacuum switch has a material such as a alkali metal halide on the cathode electrode for thermally activated field emission of electrons and ions upon interaction with a laser beam, the material being in contact with the cathode with a surface facing the discharge gap. The material is preferably a mixture of KCl and Ti powders. The laser may either shine directly on the material, preferably through a hole in the anode, or be directed to the material over a fiber optic cable.

  11. Website Contact

    Broader source: Energy.gov [DOE]

    Contact the website administrator with questions, comments, or issues related to the Federal Energy Management Program website. If your inquiry is in regard to a specific Web page, please include...

  12. Latching micro optical switch

    DOE Patents [OSTI]

    Garcia, Ernest J; Polosky, Marc A

    2013-05-21T23:59:59.000Z

    An optical switch reliably maintains its on or off state even when subjected to environments where the switch is bumped or otherwise moved. In addition, the optical switch maintains its on or off state indefinitely without requiring external power. External power is used only to transition the switch from one state to the other. The optical switch is configured with a fixed optical fiber and a movable optical fiber. The movable optical fiber is guided by various actuators in conjunction with a latching mechanism that configure the switch in one position that corresponds to the on state and in another position that corresponds to the off state.

  13. Remote switch actuator

    DOE Patents [OSTI]

    Haas, Edwin Gerard; Beauman, Ronald; Palo, Jr., Stefan

    2013-01-29T23:59:59.000Z

    The invention provides a device and method for actuating electrical switches remotely. The device is removably attached to the switch and is actuated through the transfer of a user's force. The user is able to remain physically removed from the switch site obviating need for protective equipment. The device and method allow rapid, safe actuation of high-voltage or high-current carrying electrical switches or circuit breakers.

  14. ARM - Contacts

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  15. LANL Contacts

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  18. Apollo Ring Optical Switch

    SciTech Connect (OSTI)

    Maestas, J.H.

    1987-03-01T23:59:59.000Z

    An optical switch was designed, built, and installed at Sandia National Laboratories in Albuquerque, New Mexico, to facilitate the integration of two Apollo computer networks into a single network. This report presents an overview of the optical switch as well as its layout, switch testing procedure and test data, and installation.

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  20. Contact Us

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  1. Geothermal: Contact Us

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    Contact Us Geothermal Technologies Legacy Collection HelpFAQ | Site Map | Contact Us HomeBasic Search About Publications Advanced Search New Hot Docs News Related Links Contact...

  2. Eyeglass allergic contact dermatitis

    E-Print Network [OSTI]

    Scott, Kimberly; Levender, Michelle M; Feldman, Steven R

    2010-01-01T23:59:59.000Z

    T, Iijima M, Maibach HI. Eyeglass frame allergic contactNakada T, Maibach HI. Eyeglass allergic contact dermatitis.Eyeglass allergic contact dermatitis Kimberly Scott 1 ,

  3. ARM - Contacts

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  4. ARM - Contacts

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  5. Contact Information

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    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws | NationalContact Information · President

  6. Media contact:

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  7. Alarm toe switch

    DOE Patents [OSTI]

    Ganyard, Floyd P. (Albuquerque, NM)

    1982-01-01T23:59:59.000Z

    An alarm toe switch inserted within a shoe for energizing an alarm circuit n a covert manner includes an insole mounting pad into which a miniature reed switch is fixedly molded. An elongated slot perpendicular to the reed switch is formed in the bottom surface of the mounting pad. A permanent cylindrical magnet positioned in the forward portion of the slot with a diameter greater than the pad thickness causes a bump above the pad. A foam rubber block is also positioned in the slot rearwardly of the magnet and holds the magnet in normal inoperative relation. A non-magnetic support plate covers the slot and holds the magnet and foam rubber in the slot. The plate minimizes bending and frictional forces to improve movement of the magnet for reliable switch activation. The bump occupies the knuckle space beneath the big toe. When the big toe is scrunched rearwardly the magnet is moved within the slot relative to the reed switch, thus magnetically activating the switch. When toe pressure is released the foam rubber block forces the magnet back into normal inoperative position to deactivate the reed switch. The reed switch is hermetically sealed with the magnet acting through the wall so the switch assembly S is capable of reliable operation even in wet and corrosive environments.

  8. Reusable fast opening switch

    DOE Patents [OSTI]

    Van Devender, J.P.; Emin, D.

    1983-12-21T23:59:59.000Z

    A reusable fast opening switch for transferring energy, in the form of a high power pulse, from an electromagnetic storage device such as an inductor into a load. The switch is efficient, compact, fast and reusable. The switch comprises a ferromagnetic semiconductor which undergoes a fast transition between conductive and metallic states at a critical temperature and which undergoes the transition without a phase change in its crystal structure. A semiconductor such as europium rich europhous oxide, which undergoes a conductor to insulator transition when it is joule heated from its conductor state, can be used to form the switch.

  9. Reusable fast opening switch

    DOE Patents [OSTI]

    Van Devender, John P. (Albuquerque, NM); Emin, David (Albuquerque, NM)

    1986-01-01T23:59:59.000Z

    A reusable fast opening switch for transferring energy, in the form of a high power pulse, from an electromagnetic storage device such as an inductor into a load. The switch is efficient, compact, fast and reusable. The switch comprises a ferromagnetic semiconductor which undergoes a fast transition between conductive and insulating states at a critical temperature and which undergoes the transition without a phase change in its crystal structure. A semiconductor such as europium rich europhous oxide, which undergoes a conductor to insulator transition when it is joule heated from its conductor state, can be used to form the switch.

  10. Reflective HTS switch

    DOE Patents [OSTI]

    Martens, Jon S. (Albuquerque, NM); Hietala, Vincent M. (Placitas, NM); Hohenwarter, Gert K. G. (Madison, WI)

    1994-01-01T23:59:59.000Z

    A HTS switch includes a HTS conductor for providing a superconducting path for an electrical signal and an serpentine wire actuator for controllably heating a portion of the conductor sufficiently to cause that portion to have normal, and not superconducting, resistivity. Mass of the portion is reduced to decrease switching time.

  11. Reflective HTS switch

    DOE Patents [OSTI]

    Martens, J.S.; Hietala, V.M.; Hohenwarter, G.K.G.

    1994-09-27T23:59:59.000Z

    A HTS (High Temperature Superconductor) switch includes a HTS conductor for providing a superconducting path for an electrical signal and an serpentine wire actuator for controllably heating a portion of the conductor sufficiently to cause that portion to have normal, and not superconducting, resistivity. Mass of the portion is reduced to decrease switching time. 6 figs.

  12. Erected mirror optical switch

    DOE Patents [OSTI]

    Allen, James J.

    2005-06-07T23:59:59.000Z

    A microelectromechanical (MEM) optical switching apparatus is disclosed that is based on an erectable mirror which is formed on a rotatable stage using surface micromachining. An electrostatic actuator is also formed on the substrate to rotate the stage and mirror with a high angular precision. The mirror can be erected manually after fabrication of the device and used to redirect an incident light beam at an arbitrary angel and to maintain this state in the absence of any applied electrical power. A 1.times.N optical switch can be formed using a single rotatable mirror. In some embodiments of the present invention, a plurality of rotatable mirrors can be configured so that the stages and mirrors rotate in unison when driven by a single micromotor thereby forming a 2.times.2 optical switch which can be used to switch a pair of incident light beams, or as a building block to form a higher-order optical switch.

  13. Magnetic switch for reactor control rod

    SciTech Connect (OSTI)

    Germer, J.H.

    1986-04-15T23:59:59.000Z

    This patent describes a control rod system for a nuclear reactor utilizing an electromagnetic grapple mechanism for holding and releasing a control rod, the improvement comprising a magnetic reed switch assembly having a Curie-point magnetic shunt and responsive to reactor coolant temperature for short circuiting the electromagnetic grapple mechanism causing release of the control rod when the coolant temperature reaches the Curie-point of the magnetic shunt. The magnetic reed switch assembly includes a: a permanent magnet, a pair of magnetic pole pieces located at and in contact with opposite ends of the permanent magnet, the Curie-point magnetic shunt being positioned adjacent the permanent magnet and in contact with the pair of magnetic pole pieces, and a reed switch positioned intermediate the pole pieces and provided with a pair of ferromagnetic reeds, a nonmagnetic enclosure around the reeds, a first of the reeds being secured at one end to a first of the pair of pole pieces, a second of the reeds having one end extending into and secured to a hollow member positioned in and extending through a second of the pair of pole pieces, the one end of the second of the reeds secured to a condector adapted to be connected to the electromagnetic grapple mechanism.

  14. Solid state switch

    DOE Patents [OSTI]

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

    1994-07-19T23:59:59.000Z

    A solid state switch, with reverse conducting thyristors, is designed to operate at 20 kV hold-off voltage, 1,500 A peak, 1.0 [mu]s pulsewidth, and 4,500 pps, to replace thyratrons. The solid state switch is more reliable, more economical, and more easily repaired. The switch includes a stack of circuit card assemblies, a magnetic assist and a trigger chassis. Each circuit card assembly contains a reverse conducting thyristor, a resistor capacitor network, and triggering circuitry. 6 figs.

  15. Plasmonic enhanced ultrafast switch.

    SciTech Connect (OSTI)

    Subramania,Ganapathi Subramanian; Reno, John Louis; Passmore, Brandon Scott; Harris, Tom.; Shaner, Eric Arthur; Barrick, Todd A.

    2009-09-01T23:59:59.000Z

    Ultrafast electronic switches fabricated from defective material have been used for several decades in order to produce picosecond electrical transients and TeraHertz radiation. Due to the ultrashort recombination time in the photoconductor materials used, these switches are inefficient and are ultimately limited by the amount of optical power that can be applied to the switch before self-destruction. The goal of this work is to create ultrafast (sub-picosecond response) photoconductive switches on GaAs that are enhanced through plasmonic coupling structures. Here, the plasmonic coupler primarily plays the role of being a radiation condenser which will cause carriers to be generated adjacent to metallic electrodes where they can more efficiently be collected.

  16. An optical switch

    DOE Patents [OSTI]

    Christophorou, L.G.; Hunter, S.R.

    1987-04-30T23:59:59.000Z

    The invention is a gas mixture for a diffuse discharge switch having an electron attaching gas wherein electron attachment is brought about by indirect excitation of molecules to long live states by exposure to laser light. 3 figs.

  17. Cygnus Water Switch Jitter

    SciTech Connect (OSTI)

    Charles V. Mitton, George D. Corrow, Mark D. Hansen, David J. Henderson, et al.

    2008-03-01T23:59:59.000Z

    The Cygnus Dual Beam Radiographic Facility consists of two identical radiographic sources - Cygnus 1 and Cygnus 2. Each source has the following x-ray output: 1-mm diameter spot size, 4 rad at 1 m, 50-ns Full Width Half Max. The diode pulse has the following electrical specifications: 2.25 MV, 60 kA, 60 ns. This Radiographic Facility is located in an underground tunnel test area at the Nevada Test Site (NTS). The sources were developed to produce high-resolution images on subcritical tests which are performed at NTS. Subcritical tests are single-shot, high-value events. For this application, it is desirable to maintain a high level of reproducibility in source output. The major components of the Cygnus machines are: Marx generator, water-filled pulse–forming line (PFL), water-filled coaxial transmission line, three-cell inductive voltage adder, and rod-pinch diode. A primary source of fluctuation in Cygnus shot-to-shot performance is jitter in breakdown of the main PFL switch, which is a “self-break” switch. The PFL switch breakdown time determines the peak PFL charging voltage, which ultimately affects the diode pulse. Therefore, PFL switch jitter contributes to shot-to-shot variation in source endpoint energy and dose. In this paper we will present PFL switch jitter analysis for both Cygnus machines and give the correlation with diode performance. For this analysis the PFL switch on each machine was maintained at a single gap setting which has been used for the majority of shots at NTS. In addition to this analysis, PFL switch performance for different switch gap settings taken recently will be examined. Lastly, implications of source jitter for radiographic diagnosis of subcritical shots will be discussed.

  18. Cygnus PFL Switch Jitter

    SciTech Connect (OSTI)

    C. Mitton, G. Corrow, M. Hansen, D. Henderson, et al.

    2007-07-21T23:59:59.000Z

    The Cygnus Dual Beam Radiographic Facility consists of two identical radiographic sources: Cygnus 1 and Cygnus 2. Each source has the following X-ray output: 1-mm diameter spot size, 4 rads at 1 m, 50-ns full-widthhalf-maximum. The diode pulse has the following electrical specifications: 2.25 MV, 60 kA, 60 ns. This Radiographic Facility is located in an underground tunnel test area at the Nevada Test Site (NTS). The sources were developed to produce high-resolution images on subcritical tests performed at NTS. Subcritical tests are single-shot, high-value events. For this application, it is desirable to maintain a high level of reproducibility in source output. The major components of the Cygnus machines are Marx generator, water-filled pulse forming line (PFL), water-filled coaxial transmission line, threecell inductive voltage adder, and rod-pinch diode. A primary source of fluctuation in Cygnus shot-to-shot performance may be jitter in breakdown of the main PFL switch, which is a “self-break” switch. The PFL switch breakdown time determines the peak PFL charging voltage, which ultimately affects the source X-ray spectrum and dose. Therefore, PFL switch jitter may contribute to shot-to-shot variation in these parameters, which are crucial to radiographic quality. In this paper we will present PFL switch jitter analysis for both Cygnus machines and present the correlation with dose. For this analysis, the PFL switch on each machine was maintained at a single gap setting, which has been used for the majority of shots at NTS. In addition the PFL switch performance for one larger switch gap setting will be examined.

  19. Low inductance gas switching.

    SciTech Connect (OSTI)

    Chavez, Ray; Harjes, Henry Charles III; Wallace, Zachariah; Elizondo, Juan E.

    2007-10-01T23:59:59.000Z

    The laser trigger switch (LTS) is a key component in ZR-type pulsed power systems. In ZR, the pulse rise time through the LTS is > 200 ns and additional stages of pulse compression are required to achieve the desired <100 ns rise time. The inductance of the LTS ({approx}500nH) in large part determines the energy transfer time through the switch and there is much to be gained in improving system performance and reducing system costs by reducing this inductance. The current path through the cascade section of the ZR LTS is at a diameter of {approx} 6-inches which is certainly not optimal from an inductance point of view. The LTS connects components of much greater diameter (typically 4-5 feet). In this LDRD the viability of switch concepts in which the diameter of cascade section is greatly increased have been investigated. The key technical question to be answered was, will the desired multi-channel behavior be maintained in a cascade section of larger diameter. This LDRD proceeded in 2 distinct phases. The original plan for the LDRD was to develop a promising switch concept and then design, build, and test a moderate scale switch which would demonstrate the key features of the concept. In phase I, a switch concept which meet all electrical design criteria and had a calculated inductance of 150 nH was developed. A 1.5 MV test switch was designed and fabrication was initiated. The LDRD was then redirected due to budgetary concerns. The fabrication of the switch was halted and the focus of the LDRD was shifted to small scale experiments designed to answer the key technical question concerning multi-channel behavior. In phase II, the Multi-channel switch test bed (MCST) was designed and constructed. The purpose of MCST was to provide a versatile, fast turn around facility for the study the multi-channel electrical breakdown behavior of a ZR type cascade switch gap in a parameter space near that of a ZR LTS. Parameter scans on source impedance, gap tilt, gap spacing and electrode diameter were conducted.

  20. Electronic devices containing switchably conductive silicon oxides as a switching element and methods for production and use thereof

    DOE Patents [OSTI]

    Tour, James M; Yao, Jun; Natelson, Douglas; Zhong, Lin; He, Tao

    2013-11-26T23:59:59.000Z

    In various embodiments, electronic devices containing switchably conductive silicon oxide as a switching element are described herein. The electronic devices are two-terminal devices containing a first electrical contact and a second electrical contact in which at least one of the first electrical contact or the second electrical contact is deposed on a substrate to define a gap region therebetween. A switching layer containing a switchably conductive silicon oxide resides in the the gap region between the first electical contact and the second electrical contact. The electronic devices exhibit hysteretic current versus voltage properties, enabling their use in switching and memory applications. Methods for configuring, operating and constructing the electronic devices are also presented herein.

  1. High gain photoconductive semiconductor switch having tailored doping profile zones

    DOE Patents [OSTI]

    Baca, Albert G. (Albuquerque, NM); Loubriel, Guillermo M. (Albuquerque, NM); Mar, Alan (Albuquerque, NM); Zutavern, Fred J (Albuquerque, NM); Hjalmarson, Harold P. (Albuquerque, NM); Allerman, Andrew A. (Albuquerque, NM); Zipperian, Thomas E. (Edgewood, NM); O'Malley, Martin W. (Edgewood, NM); Helgeson, Wesley D. (Albuquerque, NM); Denison, Gary J. (Sandia Park, NM); Brown, Darwin J. (Albuquerque, NM); Sullivan, Charles T. (Albuquerque, NM); Hou, Hong Q. (Albuquerque, NM)

    2001-01-01T23:59:59.000Z

    A photoconductive semiconductor switch with tailored doping profile zones beneath and extending laterally from the electrical contacts to the device. The zones are of sufficient depth and lateral extent to isolate the contacts from damage caused by the high current filaments that are created in the device when it is turned on. The zones may be formed by etching depressions into the substrate, then conducting epitaxial regrowth in the depressions with material of the desired doping profile. They may be formed by surface epitaxy. They may also be formed by deep diffusion processes. The zones act to reduce the energy density at the contacts by suppressing collective impact ionization and formation of filaments near the contact and by reducing current intensity at the contact through enhanced current spreading within the zones.

  2. Switching power pulse system

    DOE Patents [OSTI]

    Aaland, K.

    1983-08-09T23:59:59.000Z

    A switching system for delivering pulses of power from a source to a load using a storage capacitor charged through a rectifier, and maintained charged to a reference voltage level by a transistor switch and voltage comparator. A thyristor is triggered to discharge the storage capacitor through a saturable reactor and fractional turn saturable transformer having a secondary to primary turn ratio N of n:l/n = n[sup 2]. The saturable reactor functions as a soaker'' while the thyristor reaches saturation, and then switches to a low impedance state. The saturable transformer functions as a switching transformer with high impedance while a load coupling capacitor charges, and then switches to a low impedance state to dump the charge of the storage capacitor into the load through the coupling capacitor. The transformer is comprised of a multilayer core having two secondary windings tightly wound and connected in parallel to add their output voltage and reduce output inductance, and a number of single turn windings connected in parallel at nodes for the primary winding, each single turn winding linking a different one of the layers of the multilayer core. The load may be comprised of a resistive beampipe for a linear particle accelerator and capacitance of a pulse forming network. To hold off discharge of the capacitance until it is fully charged, a saturable core is provided around the resistive beampipe to isolate the beampipe from the capacitance until it is fully charged. 5 figs.

  3. Thermionic gas switch

    DOE Patents [OSTI]

    Hatch, G.L.; Brummond, W.A.; Barrus, D.M.

    1984-04-05T23:59:59.000Z

    The present invention is directed to an improved temperature responsive thermionic gas switch utilizing a hollow cathode and a folded emitter surface area. The folded emitter surface area of the thermionic switch substantially increases the on/off ratio by changing the conduction surface area involved in the two modes thereof. The improved switch of this invention provides an on/off ratio of 450:1 compared to the 10:1 ratio of the prior known thermionic switch, while providing for adjusting the on current. In the improved switch of this invention the conduction area is made small in the off mode, while in the on mode the conduction area is made large. This is achieved by utilizing a folded hollow cathode configuration and utilizing a folded emitter surface area, and by making the dimensions of the folds small enough so that a space charge will develop in the convolutions of the folds and suppress unignited current, thus limiting the current carrying surface in the off mode.

  4. Chemical Management Contacts

    Broader source: Energy.gov [DOE]

    Contacts for additional information on Chemical Management and brief description on Energy Facility Contractors Group

  5. Switching power supply

    DOE Patents [OSTI]

    Mihalka, A.M.

    1984-06-05T23:59:59.000Z

    The invention is a repratable capacitor charging, switching power supply. A ferrite transformer steps up a dc input. The transformer primary is in a full bridge configuration utilizing power MOSFETs as the bridge switches. The transformer secondary is fed into a high voltage, full wave rectifier whose output is connected directly to the energy storage capacitor. The transformer is designed to provide adequate leakage inductance to limit capacitor current. The MOSFETs are switched to the variable frequency from 20 to 50 kHz to charge a capacitor from 0.6 kV. The peak current in a transformer primary and secondary is controlled by increasing the pulse width as the capacitor charges. A digital ripple counter counts pulses and after a preselected desired number is reached an up-counter is clocked.

  6. Microfabricated triggered vacuum switch

    DOE Patents [OSTI]

    Roesler, Alexander W. (Tijeras, NM); Schare, Joshua M. (Albuquerque, NM); Bunch, Kyle (Albuquerque, NM)

    2010-05-11T23:59:59.000Z

    A microfabricated vacuum switch is disclosed which includes a substrate upon which an anode, cathode and trigger electrode are located. A cover is sealed over the substrate under vacuum to complete the vacuum switch. In some embodiments of the present invention, a metal cover can be used in place of the trigger electrode on the substrate. Materials used for the vacuum switch are compatible with high vacuum, relatively high temperature processing. These materials include molybdenum, niobium, copper, tungsten, aluminum and alloys thereof for the anode and cathode. Carbon in the form of graphitic carbon, a diamond-like material, or carbon nanotubes can be used in the trigger electrode. Channels can be optionally formed in the substrate to mitigate against surface breakdown.

  7. Transparent electrode for optical switch

    DOE Patents [OSTI]

    Goldhar, J.; Henesian, M.A.

    1984-10-19T23:59:59.000Z

    The invention relates generally to optical switches and techniques for applying a voltage to an electro-optical crystal, and more particularly, to transparent electodes for an optical switch. System architectures for very large inertial confinement fusion (ICF) lasers require active optical elements with apertures on the order of one meter. Large aperture optical switches are needed for isolation of stages, switch-out from regenerative amplifier cavities and protection from target retroreflections.

  8. High performance RF MEMS metal-contact switches and switching networks

    E-Print Network [OSTI]

    Patel, Chirag D.; Patel, Chirag D.

    2012-01-01T23:59:59.000Z

    applications,” in Microelectromechanical Systems Conference,microscopy,” Microelectromechanical Systems, Journal of,applications,” Microelectromechanical Systems, Journal of,

  9. High performance RF MEMS metal-contact switches and switching networks

    E-Print Network [OSTI]

    Patel, Chirag D.; Patel, Chirag D.

    2012-01-01T23:59:59.000Z

    T is grounded. For the creep test, the device was held downby FEM. Figure 5.35: Test setup for creep, reliability, andFigure 5.35: Test setup for creep, reliability, and power

  10. Hazardous Materials Alert Departmental Contact(s)

    E-Print Network [OSTI]

    Hickman, Mark

    Hazardous Materials Alert Departmental Contact(s): Name ___________________________________________________________________________________ Hazardous Materials Alert If the release of a hazardous chemical or gas is affecting people in your area yourself at risk. 2. isOlATE the hazardous material by clearing the area, close the doors. If safe to do so

  11. Switching power pulse system

    DOE Patents [OSTI]

    Aaland, Kristian (Livermore, CA)

    1983-01-01T23:59:59.000Z

    A switching system for delivering pulses of power from a source (10) to a load (20) using a storage capacitor (C3) charged through a rectifier (D1, D2), and maintained charged to a reference voltage level by a transistor switch (Q1) and voltage comparator (12). A thyristor (22) is triggered to discharge the storage capacitor through a saturable reactor (18) and fractional turn saturable transformer (16) having a secondary to primary turn ratio N of n:l/n=n.sup.2. The saturable reactor (18) functions as a "soaker" while the thyristor reaches saturation, and then switches to a low impedance state. The saturable transformer functions as a switching transformer with high impedance while a load coupling capacitor (C4) charges, and then switches to a low impedance state to dump the charge of the storage capacitor (C3) into the load through the coupling capacitor (C4). The transformer is comprised of a multilayer core (26) having two secondary windings (28, 30) tightly wound and connected in parallel to add their output voltage and reduce output inductance, and a number of single turn windings connected in parallel at nodes (32, 34) for the primary winding, each single turn winding linking a different one of the layers of the multilayer core. The load may be comprised of a resistive beampipe (40) for a linear particle accelerator and capacitance of a pulse forming network (42). To hold off discharge of the capacitance until it is fully charged, a saturable core (44) is provided around the resistive beampipe (40) to isolate the beampipe from the capacitance (42) until it is fully charged.

  12. High-current, fast-switching transistor development

    SciTech Connect (OSTI)

    Hower, P.L.

    1981-03-15T23:59:59.000Z

    Work that shows how the results obtained under a previous contract (NAS3-18916) have been applied to a larger-diameter (33-mm) transistor are described. An improved base contact for equalizing the base-emitter voltage at high currents has been developed along with an improved emitter contact preform which increases the silicon area available for current conduction. The electrical performance achieved is consistent with the proposed optimum design. The device design, wafer-processing techniques, and various measurements which include forward SOA, dc characteristics, and switching times are described.

  13. Plasma opening switch

    DOE Patents [OSTI]

    Savage, Mark E. (Albuquerque, NM); Mendel, Jr., Clifford W. (Albuquerque, NM)

    2001-01-01T23:59:59.000Z

    A command triggered plasma opening switch assembly using an amplification stage. The assembly surrounds a coaxial transmission line and has a main plasma opening switch (POS) close to the load and a trigger POS upstream from the main POS. The trigger POS establishes two different current pathways through the assembly depended on whether it has received a trigger current pulse. The initial pathway has both POS's with plasma between their anodes and cathodes to form a short across the transmission line and isolating the load. The final current pathway is formed when the trigger POS receives a trigger current pulse which energizes its fast coil to push the conductive plasma out from between its anode and cathode, allowing the main transmission line current to pass to the fast coil of the main POS, thus pushing its plasma out the way so as to establish a direct current pathway to the load.

  14. The quantum cryptographic switch

    E-Print Network [OSTI]

    Srinatha Narayanaswamy; Omkar Srikrishna; R. Srikanth; Subhashish Banerjee; Anirban Pathak

    2011-11-21T23:59:59.000Z

    We illustrate using a quantum system the principle of a cryptographic switch, in which a third party (Charlie) can control to a continuously varying degree the amount of information the receiver (Bob) receives, after the sender (Alice) has sent her information. Suppose Charlie transmits a Bell state to Alice and Bob. Alice uses dense coding to transmit two bits to Bob. Only if the 2-bit information corresponding to choice of Bell state is made available by Charlie to Bob can the latter recover Alice's information. By varying the information he gives, Charlie can continuously vary the information recovered by Bob. The performance of the protocol subjected to the squeezed generalized amplitude damping channel is considered. We also present a number of practical situations where a cryptographic switch would be of use.

  15. SWITCH Model AND Data Description: 2050 Timeframe................................................ 2 SWITCH Model Description ........................................................................................................2

    E-Print Network [OSTI]

    Kammen, Daniel M.

    , Berkeley. SWITCH Model Description 1. Study Years, Months, Dates and Hours To simulate power system1 SWITCH Model AND Data Description: 2050 Timeframe................................................ 2 SWITCH Model Description

  16. CREE: Making the Switch

    ScienceCinema (OSTI)

    Grider, David; Palmer, John

    2014-04-09T23:59:59.000Z

    CREE, with the help of ARPA-E funding, has developed a Silicon Carbide (SIC) transistor which can be used to create solid state transformers capable of meeting the unique needs of the emerging smart grid. SIC transistors are different from common silicon computer chips in that they handle grid scale voltages with ease and their high frequency switching is well suited to the intermittent nature of renewable energy generation.

  17. CREE: Making the Switch

    SciTech Connect (OSTI)

    Grider, David; Palmer, John

    2014-03-06T23:59:59.000Z

    CREE, with the help of ARPA-E funding, has developed a Silicon Carbide (SIC) transistor which can be used to create solid state transformers capable of meeting the unique needs of the emerging smart grid. SIC transistors are different from common silicon computer chips in that they handle grid scale voltages with ease and their high frequency switching is well suited to the intermittent nature of renewable energy generation.

  18. Ultrafast gas switching experiments

    SciTech Connect (OSTI)

    Frost, C.A.; Martin, T.H.; Patterson, P.E.; Rinehart, L.F.; Rohwein, G.J.; Roose, L.D.; Aurand, J.F.; Buttram, M.T.

    1996-11-01T23:59:59.000Z

    We describe recent experiments which studied the physics of ultrafast gas breakdown under the extreme overvoltages which occur when a high pressure gas switch is pulse charged to hundreds of kV in 1 ns or less. The highly overvolted peaking gaps produce powerful electromagnetic pulses with risetimes < 100 ps which can be used for ultrawideband radar systems, particle accelerators, laser drivers, bioelectromagnetic studies, electromagnetic effects testing, and for basic studies of gas breakdown physics. We have produced and accurately measured pulses with 50 to 100 ps risetimes to peak levels of 75 to 160 kV at pulse repetition frequencies (PRF) to I kHz. A unique gas switch was developed to hold off hundreds of kV with parasitic inductance less than I nH. An advanced diagnostic system using Fourier compensation was developed to measure single-shot risetimes below 35 ps. The complete apparatus is described and wave forms are presented. The measured data are compared with a theoretical model which predicts key features including dependence on gas species and pressure. We have applied this technology to practical systems driving ultrawideband radiating antennas and bounded wave simulators. For example, we have developed a thyristor/pulse transformer based system using a highly overvolted cable switch. This pulser driving a Sandia- designed TEM cell, provides an ultra wideband impulse with < 200 ps risetime to the test object at a PRF > 1 kHz at > 100 kV/m E field.

  19. Compound semiconductor optical waveguide switch

    DOE Patents [OSTI]

    Spahn, Olga B.; Sullivan, Charles T.; Garcia, Ernest J.

    2003-06-10T23:59:59.000Z

    An optical waveguide switch is disclosed which is formed from III-V compound semiconductors and which has a moveable optical waveguide with a cantilevered portion that can be bent laterally by an integral electrostatic actuator to route an optical signal (i.e. light) between the moveable optical waveguide and one of a plurality of fixed optical waveguides. A plurality of optical waveguide switches can be formed on a common substrate and interconnected to form an optical switching network.

  20. Hybrid switch for resonant power converters

    DOE Patents [OSTI]

    Lai, Jih-Sheng; Yu, Wensong

    2014-09-09T23:59:59.000Z

    A hybrid switch comprising two semiconductor switches connected in parallel but having different voltage drop characteristics as a function of current facilitates attainment of zero voltage switching and reduces conduction losses to complement reduction of switching losses achieved through zero voltage switching in power converters such as high-current inverters.

  1. Sensor Switch's Bright Manufacturing Future

    Broader source: Energy.gov [DOE]

    The switch helps with cost effective energy savings by turning off the lights when an occupancy sensor says the room is empty.

  2. Climate VISION: Contact Us

    Office of Scientific and Technical Information (OSTI)

    of Energy Office of Climate Change Policy and Technology (PI-50) 202-586-8339 Mining - Contacts Association Climate VISION Lead Constance Holmes Senior Economist, Director...

  3. Contacts | Argonne National Laboratory

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

    Contacts Postdoc Portal The Postdoctoral Office of Argonne provides all Postdocs at Argonne access to our sharepoint postdoc site. This site has information about special...

  4. Coral contact dermatitis

    E-Print Network [OSTI]

    Jefferson, Julie; Thompson, Curtis; Hinshaw, Molly; Rich, Phoebe

    2015-01-01T23:59:59.000Z

    skin reaction to Red Sea coral injury showing superficial11736921] 5. Addy JH. Red sea coral contact dermatitis. Inthypersensitivity reaction to coral. J Am Acad Dermatol. 2005

  5. Federal NEPA Contacts

    Broader source: Energy.gov [DOE]

    CEQ and most Federal agencies identify primary points of contact for NEPA compliance. Normally a senior environmental professional, environmental law attorney, or member of agency leadership, these...

  6. Robust adaptive control of switched systems

    E-Print Network [OSTI]

    El-Rifai, Khalid, 1979-

    2007-01-01T23:59:59.000Z

    In this thesis, robust adaptive controllers are developed for classes of switched nonlinear systems. Switched systems are those governed by differential equations, which undergo vector field switching due to sudden changes ...

  7. Electrochromic optical switching device

    DOE Patents [OSTI]

    Lampert, C.M.; Visco, S.J.

    1992-08-25T23:59:59.000Z

    An electrochromic cell is disclosed which comprises an electrochromic layer, a polymerizable organo-sulfur layer which comprises the counter electrode of the structure, and an ionically conductive electronically insulating material which comprises the separator between the electrodes. In a preferred embodiment, both the separator and the organo-sulfur electrode (in both its charged and uncharged states) are transparent either to visible light or to the entire solar spectrum. An electrochromic device is disclosed which comprises such electrodes and separator encased in glass plates on the inner surface of each of which is formed a transparent electrically conductive film in respective electrical contact with the electrodes which facilitates formation of an external electrical connection or contact to the electrodes of the device to permit electrical connection of the device to an external potential source. 3 figs.

  8. Electrochromic optical switching device

    SciTech Connect (OSTI)

    Lampert, Carl M. (El Sobrante, CA); Visco, Steven J. (Berkeley, CA)

    1992-01-01T23:59:59.000Z

    An electrochromic cell is disclosed which comprises an electrochromic layer, a polymerizable organo-sulfur layer which comprises the counter electrode of the structure, and an ionically conductive electronically insulating material which comprises the separator between the electrodes. In a preferred embodiment, both the separator and the organo-sulfur electrode (in both its charged and uncharged states) are transparent either to visible light or to the entire solar spectrum. An electrochromic device is disclosed which comprises such electrodes and separator encased in glass plates on the inner surface of each of which is formed a transparent electrically conductive film in respective electrical contact with the electrodes which facilitates formation of an external electrical connection or contact to the electrodes of the device to permit electrical connection of the device to an external potential source.

  9. Nanometer Resolution Imaging by SIngle Molecule Switching. |...

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

    Nanometer Resolution Imaging by SIngle Molecule Switching. Nanometer Resolution Imaging by SIngle Molecule Switching. Abstract: The fluorescence intensity of single molecules can...

  10. Hairpin DNA Switch for Ultrasensitive Spectrophotometric Detection...

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

    Hairpin DNA Switch for Ultrasensitive Spectrophotometric Detection of DNA Hybridization Based on Gold Nanoparticles and Enzyme Hairpin DNA Switch for Ultrasensitive...

  11. Optimized scalable network switch

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton On Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY); Gara, Alan G. (Mount Kisco, NY); Giampapa, Mark E. (Irvington, NY); Heidelberger, Philip (Cortlandt Manor, NY); Steinmacher-Burow, Burkhard D. (Mount Kisco, NY); Takken, Todd E. (Mount Kisco, NY); Vranas, Pavlos M. (Bedford Hills, NY)

    2007-12-04T23:59:59.000Z

    In a massively parallel computing system having a plurality of nodes configured in m multi-dimensions, each node including a computing device, a method for routing packets towards their destination nodes is provided which includes generating at least one of a 2m plurality of compact bit vectors containing information derived from downstream nodes. A multilevel arbitration process in which downstream information stored in the compact vectors, such as link status information and fullness of downstream buffers, is used to determine a preferred direction and virtual channel for packet transmission. Preferred direction ranges are encoded and virtual channels are selected by examining the plurality of compact bit vectors. This dynamic routing method eliminates the necessity of routing tables, thus enhancing scalability of the switch.

  12. ''Smart'' watchdog safety switch

    DOE Patents [OSTI]

    Kronberg, J.W.

    1991-10-01T23:59:59.000Z

    A method and apparatus for monitoring a process having a periodic output so that the process equipment is not damaged in the event of a controller failure, comprising a low-pass and peak clipping filter, an event detector that generates an event pulse for each valid change in magnitude of the filtered periodic output, a timing pulse generator, a counter that increments upon receipt of any timing pulse and resets to zero on receipt of any event pulse, an alarm that alerts when the count reaches some preselected total count, and a set of relays that opens to stop power to process equipment. An interface module can be added to allow the switch to accept a variety of periodic output signals. 21 figures.

  13. Optimized scalable network switch

    DOE Patents [OSTI]

    Blumrich, Matthias A. (Ridgefield, CT); Chen, Dong (Croton on Hudson, NY); Coteus, Paul W. (Yorktown Heights, NY)

    2010-02-23T23:59:59.000Z

    In a massively parallel computing system having a plurality of nodes configured in m multi-dimensions, each node including a computing device, a method for routing packets towards their destination nodes is provided which includes generating at least one of a 2m plurality of compact bit vectors containing information derived from downstream nodes. A multilevel arbitration process in which downstream information stored in the compact vectors, such as link status information and fullness of downstream buffers, is used to determine a preferred direction and virtual channel for packet transmission. Preferred direction ranges are encoded and virtual channels are selected by examining the plurality of compact bit vectors. This dynamic routing method eliminates the necessity of routing tables, thus enhancing scalability of the switch.

  14. Alarm toe switch. [Patent application

    DOE Patents [OSTI]

    Ganyard, F.P.

    1980-11-18T23:59:59.000Z

    An alarm toe switch inserted within a shoe for energizing an alarm circuit in a covert manner includes an insole mounting pad into which a miniature reed switch is fixedly molded. An elongated slot perpendicular to the reed switch is formed in the bottom surface of the mounting pad. A permanent cylindrical magnet positioned in the forward portion of the slot with a diameter greater than the pad thickness causes a bump above the pad. A foam rubber block is also positioned in the slot rearwardly of the magnet and holds the magnet in normal inoperative relation. A non-magnetic support plate covers the slot and holds the magnet and foam rubber in the slot. The plate minimizes bending and frictional forces to improve movement of the magnet for reliable switch activation. The bump occupies the knuckle space beneath the big toe. When the big toe is scrunched rearwardly the magnet is moved within the slot relative to the reed switch, thus magnetically activating the switch. When toe pressure is released the foam rubber block forces the magnet back into normal inoperative position to deactivate the reed switch.

  15. Contact Us - Hanford Site

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation and Contact InformationContact Us Contact

  16. Contact Us | Geothermal

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws | NationalContactAboutContact Us Contact

  17. Contact | The Ames Laboratory

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws |Contact Us Contact Us Please|Contact

  18. Identifying Lights with their Switches Jayadev Misra

    E-Print Network [OSTI]

    Misra, Jayadev

    Identifying Lights with their Switches Jayadev Misra 09/07/2012 Problem Description Given are N switches and N lights where each switch controls exactly one light and each light is controlled by exactly of selecting some number of switches and turning them on, and, presumably, noting the lights that come

  19. NREL: Library - Contacts

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

    of the Information Commons at the National Renewable Energy Laboratory. Contact the library if you need assistance. Phone: 303-275-4215 E-mail: Library@nrel.gov 15013 Denver...

  20. Contact thermal lithography

    E-Print Network [OSTI]

    Schmidt, Aaron Jerome, 1979-

    2004-01-01T23:59:59.000Z

    Contact thermal lithography is a method for fabricating microscale patterns using heat transfer. In contrast to photolithography, where the minimum achievable feature size is proportional to the wavelength of light used ...

  1. Optimal Switching with Quasi-Left-Continuous Switching Costs that Can Change Sign

    E-Print Network [OSTI]

    Glendinning, Paul

    for the switching problem in terms of interconnected Snell envelopes. We also prove the existence of an optimalOptimal Switching with Quasi-Left-Continuous Switching Costs that Can Change Sign Randall Martyr of Mathematics, The University of Manchester #12;Optimal switching with quasi-left-continuous switching costs

  2. Wide Bandgap Extrinsic Photoconductive Switches

    SciTech Connect (OSTI)

    Sullivan, J S

    2012-01-17T23:59:59.000Z

    Photoconductive semiconductor switches (PCSS) have been investigated since the late 1970s. Some devices have been developed that withstand tens of kilovolts and others that switch hundreds of amperes. However, no single device has been developed that can reliably withstand both high voltage and switch high current. Yet, photoconductive switches still hold the promise of reliable high voltage and high current operation with subnanosecond risetimes. Particularly since good quality, bulk, single crystal, wide bandgap semiconductor materials have recently become available. In this chapter we will review the basic operation of PCSS devices, status of PCSS devices and properties of the wide bandgap semiconductors 4H-SiC, 6H-SiC and 2H-GaN.

  3. Electronic logic for enhanced switch reliability

    DOE Patents [OSTI]

    Cooper, J.A.

    1984-01-20T23:59:59.000Z

    A logic circuit is used to enhance redundant switch reliability. Two or more switches are monitored for logical high or low output. The output for the logic circuit produces a redundant and fail-safe representation of the switch outputs. When both switch outputs are high, the output is high. Similarly, when both switch outputs are low, the logic circuit's output is low. When the output states of the two switches do not agree, the circuit resolves the conflict by memorizing the last output state which both switches were simultaneously in and produces the logical complement of this output state. Thus, the logic circuit of the present invention allows the redundant switches to be treated as if they were in parallel when the switches are open and as if they were in series when the switches are closed. A failsafe system having maximum reliability is thereby produced.

  4. High PRF high current switch

    DOE Patents [OSTI]

    Moran, Stuart L. (Fredericksburg, VA); Hutcherson, R. Kenneth (College Park, MD)

    1990-03-27T23:59:59.000Z

    A triggerable, high voltage, high current, spark gap switch for use in pu power systems. The device comprises a pair of electrodes in a high pressure hydrogen environment that is triggered by introducing an arc between one electrode and a trigger pin. Unusually high repetition rates may be obtained by undervolting the switch, i.e., operating the trigger at voltages much below the self-breakdown voltage of the device.

  5. Media Contacts | Argonne National Laboratory

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

    Media Contacts Christopher J. Kramer Argonne National Laboratory Christopher J. Kramer is the manager of media relations and external affairs for Argonne. Contact him at...

  6. Contact urticaria to raw potato

    E-Print Network [OSTI]

    Lagrán, Z Martínez de; Frutos, FJ Ortiz de; Arribas, M González de; Vanaclocha-Sebastián, F

    2009-01-01T23:59:59.000Z

    allergen in latex-induced potato allergy. Ann Allergy Asthmaof allergy to cooked potatoes in children. Allergy 2007;62(contact dermatitis from potato flesh. Contact Dermatitis

  7. Plasma flow switch experiment on Procyon

    SciTech Connect (OSTI)

    Benage, J.F. Jr.; Bowers, R.; Peterson, D. [and others

    1995-09-01T23:59:59.000Z

    This report presents the results obtained from a series of plasma flow switch experiments done on the Procyon explosive pulse power generator. These experiments involved switching into a fixed inductance dummy load and also into a dynamic implosion load. The results indicated that the switch did fairly well at switching current into the load, but the results for the implosion are more ambiguous. The results are compared to calculations and the implications for future plasma flow switch work are discussed.

  8. Organization Chart and Contacts | Department of Energy

    Office of Environmental Management (EM)

    About the Fuel Cell Technologies Office Organization Chart and Contacts Organization Chart and Contacts Organization Chart and Contacts Contact Information U.S. Department of...

  9. Renewable Energy Contacts | Department of Energy

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

    Contacts Renewable Energy Contacts For more information about renewable energy, contact: Contact Organization Specialty Jesse Gary 202-287-1850 Federal Energy Management Program...

  10. Contacts - EERE Commercialization Office

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation andInformationContactContacts

  11. Contact Us | DOEpatents

    Office of Scientific and Technical Information (OSTI)

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  12. Contact: Nathan Howard

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    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws |Contact Us ContactNathan Howard

  13. Contacts & Resources

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    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws |Contact Us ContactNathan

  14. US ITER | Contact Us

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    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 742EnergyOnItemResearch >Internship Program TheSite Map Site Map HomeUS Key Contact Key Contact

  15. Contact - Cyclotron Institute

    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,ARMFormsGas SeparationsRelevant toSite Map Homehome / Contact ToContact

  16. Contact Us - Hanford Site

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    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,ARMFormsGas SeparationsRelevant toSite Map HomehomeContact Us Contact Us

  17. Contact Us - Pantex Plant

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    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,ARMFormsGas SeparationsRelevant toSite Map HomehomeContact Us Contact

  18. Technology Advertising Contact Information

    E-Print Network [OSTI]

    Peters, Richard

    Overview #12;Technology Advertising Contact Information Alex Sheath 8596 4063 asheath Overview Our online Technology section is geared towards an IT professional environment, reaching a range of technology enthusiasts from every day gadget consumers to business decision makers where enterprise solutions

  19. Secure Core Contact Information

    E-Print Network [OSTI]

    Secure Core Contact Information C. E. Irvine irvine@nps.edu 831-656-2461 Department of Computer for the secure management of local and/or remote information in multiple contexts. The SecureCore project Science Graduate School of Operations and Information Sciences www.cisr.nps.edu Project Description

  20. Methods for batch fabrication of cold cathode vacuum switch tubes

    DOE Patents [OSTI]

    Walker, Charles A. (Albuquerque, NM); Trowbridge, Frank R. (Albuquerque, NM)

    2011-05-10T23:59:59.000Z

    Methods are disclosed for batch fabrication of vacuum switch tubes that reduce manufacturing costs and improve tube to tube uniformity. The disclosed methods comprise creating a stacked assembly of layers containing a plurality of adjacently spaced switch tube sub-assemblies aligned and registered through common layers. The layers include trigger electrode layer, cathode layer including a metallic support/contact with graphite cathode inserts, trigger probe sub-assembly layer, ceramic (e.g. tube body) insulator layer, and metallic anode sub-assembly layer. Braze alloy layers are incorporated into the stacked assembly of layers, and can include active metal braze alloys or direct braze alloys, to eliminate costs associated with traditional metallization of the ceramic insulator layers. The entire stacked assembly is then heated to braze/join/bond the stack-up into a cohesive body, after which individual switch tubes are singulated by methods such as sawing. The inventive methods provide for simultaneously fabricating a plurality of devices as opposed to traditional methods that rely on skilled craftsman to essentially hand build individual devices.

  1. Switch for serial or parallel communication networks

    DOE Patents [OSTI]

    Crosette, Dario B. (DeSoto, TX)

    1994-01-01T23:59:59.000Z

    A communication switch apparatus and a method for use in a geographically extensive serial, parallel or hybrid communication network linking a multi-processor or parallel processing system has a very low software processing overhead in order to accommodate random burst of high density data. Associated with each processor is a communication switch. A data source and a data destination, a sensor suite or robot for example, may also be associated with a switch. The configuration of the switches in the network are coordinated through a master processor node and depends on the operational phase of the multi-processor network: data acquisition, data processing, and data exchange. The master processor node passes information on the state to be assumed by each switch to the processor node associated with the switch. The processor node then operates a series of multi-state switches internal to each communication switch. The communication switch does not parse and interpret communication protocol and message routing information. During a data acquisition phase, the communication switch couples sensors producing data to the processor node associated with the switch, to a downlink destination on the communications network, or to both. It also may couple an uplink data source to its processor node. During the data exchange phase, the switch couples its processor node or an uplink data source to a downlink destination (which may include a processor node or a robot), or couples an uplink source to its processor node and its processor node to a downlink destination.

  2. Switch for serial or parallel communication networks

    DOE Patents [OSTI]

    Crosette, D.B.

    1994-07-19T23:59:59.000Z

    A communication switch apparatus and a method for use in a geographically extensive serial, parallel or hybrid communication network linking a multi-processor or parallel processing system has a very low software processing overhead in order to accommodate random burst of high density data. Associated with each processor is a communication switch. A data source and a data destination, a sensor suite or robot for example, may also be associated with a switch. The configuration of the switches in the network are coordinated through a master processor node and depends on the operational phase of the multi-processor network: data acquisition, data processing, and data exchange. The master processor node passes information on the state to be assumed by each switch to the processor node associated with the switch. The processor node then operates a series of multi-state switches internal to each communication switch. The communication switch does not parse and interpret communication protocol and message routing information. During a data acquisition phase, the communication switch couples sensors producing data to the processor node associated with the switch, to a downlink destination on the communications network, or to both. It also may couple an uplink data source to its processor node. During the data exchange phase, the switch couples its processor node or an uplink data source to a downlink destination (which may include a processor node or a robot), or couples an uplink source to its processor node and its processor node to a downlink destination. 9 figs.

  3. High voltage MOSFET switching circuit

    DOE Patents [OSTI]

    McEwan, T.E.

    1994-07-26T23:59:59.000Z

    The problem of source lead inductance in a MOSFET switching circuit is compensated for by adding an inductor to the gate circuit. The gate circuit inductor produces an inductive spike which counters the source lead inductive drop to produce a rectangular drive voltage waveform at the internal gate-source terminals of the MOSFET. 2 figs.

  4. High voltage MOSFET switching circuit

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    The problem of source lead inductance in a MOSFET switching circuit is compensated for by adding an inductor to the gate circuit. The gate circuit inductor produces an inductive spike which counters the source lead inductive drop to produce a rectangular drive voltage waveform at the internal gate-source terminals of the MOSFET.

  5. Contact stress sensor

    DOE Patents [OSTI]

    Kotovsky, Jack

    2014-02-11T23:59:59.000Z

    A method for producing a contact stress sensor that includes one or more MEMS fabricated sensor elements, where each sensor element of includes a thin non-recessed portion, a recessed portion and a pressure sensitive element adjacent to the recessed portion. An electric circuit is connected to the pressure sensitive element. The circuit includes a pressure signal circuit element configured to provide a signal upon movement of the pressure sensitive element.

  6. ARM - NSA Contacts

    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 3,625govInstrumentstdmadap Documentation TDMADAP : XDCnarrowbandheat flux ARMMeasurementsMethaneContacts NSA Related

  7. DOE Radiation Records Contacts List

    Broader source: Energy.gov [DOE]

    DOE radiation records contact list for individuals to obtain records of occupational exposure directly from a DOE site.

  8. Secure videoconferencing equipment switching system and method

    DOE Patents [OSTI]

    Hansen, Michael E. (Livermore, CA)

    2009-01-13T23:59:59.000Z

    A switching system and method are provided to facilitate use of videoconference facilities over a plurality of security levels. The system includes a switch coupled to a plurality of codecs and communication networks. Audio/Visual peripheral components are connected to the switch. The switch couples control and data signals between the Audio/Visual peripheral components and one but nor both of the plurality of codecs. The switch additionally couples communication networks of the appropriate security level to each of the codecs. In this manner, a videoconferencing facility is provided for use on both secure and non-secure networks.

  9. Laser method for forming low-resistance ohmic contacts on semiconducting oxides

    DOE Patents [OSTI]

    Narayan, Jagdish (Knoxville, TN)

    1981-01-01T23:59:59.000Z

    This invention is a new method for the formation of high-quality ohmic contacts on wide-band-gap semiconducting oxides. As exemplified by the formation of an ohmic contact on n-type BaTiO.sub.3 containing a p-n junction, the invention entails depositing a film of a metallic electroding material on the BaTiO.sub.3 surface and irradiating the film with a Q-switched laser pulse effecting complete melting of the film and localized melting of the surface layer of oxide immediately underlying the film. The resulting solidified metallic contact is ohmic, has unusually low contact resistance, and is thermally stable, even at elevated temperatures. The contact does not require cleaning before attachment of any suitable electrical lead. This method is safe, rapid, reproducible, and relatively inexpensive.

  10. Semiconductor diode laser having an intracavity spatial phase controller for beam control and switching

    DOE Patents [OSTI]

    Hohimer, John P. (Albuquerque, NM)

    1994-01-01T23:59:59.000Z

    A high-power broad-area semiconductor laser having a intracavity spatial phase controller is disclosed. The integrated intracavity spatial phase controller is easily formed by patterning an electrical contact metallization layer when fabricating the semiconductor laser. This spatial phase controller changes the normally broad far-field emission beam of such a laser into a single-lobed near-diffraction-limited beam at pulsed output powers of over 400 mW. Two operating modes, a thermal and a gain operating mode, exist for the phase controller, allowing for steering and switching the beam as the modes of operation are switched, and the emission beam may be scanned, for example, over a range of 1.4 degrees or switched by 8 degrees. More than one spatial phase controller may be integrated into the laser structure.

  11. High speed transfer switch with 50 kA and 50 kV

    SciTech Connect (OSTI)

    Reass, W.A.; Kasik, R.J.; Wilds, W.A.

    1989-01-01T23:59:59.000Z

    This paper gives the mechanical design and electrical parameters of a pneumatically operated transfer switch. This design is used to switch 3-second 50-kA current pulses, and is easily capable of 75 kA operation (2 {times} 10{sup 10} I{sup 2}t); with water-cooled versions capable of 20 kA continuously. Although the switch is not specifically designed to make or break 50 kA, it is provided with auxiliary Elkonite arcing contacts have proven their value in protecting the main electrodes even under repetitive (50 kA) fault conditions. Included in this presentation will be the results of extensive life testing and associated criteria. 6 figs., 1 tab.

  12. Semiconductor diode laser having an intracavity spatial phase controller for beam control and switching

    DOE Patents [OSTI]

    Hohimer, J.P.

    1994-06-07T23:59:59.000Z

    A high-power broad-area semiconductor laser having a intracavity spatial phase controller is disclosed. The integrated intracavity spatial phase controller is easily formed by patterning an electrical contact metallization layer when fabricating the semiconductor laser. This spatial phase controller changes the normally broad far-field emission beam of such a laser into a single-lobed near-diffraction-limited beam at pulsed output powers of over 400 mW. Two operating modes, a thermal and a gain operating mode, exist for the phase controller, allowing for steering and switching the beam as the modes of operation are switched, and the emission beam may be scanned, for example, over a range of 1.4 degrees or switched by 8 degrees. More than one spatial phase controller may be integrated into the laser structure. 6 figs.

  13. Contact Issue 1

    E-Print Network [OSTI]

    Multiple Contributors

    1976-01-01T23:59:59.000Z

    , '\\ ..... ,. '" ' ; ') I f. I , j ------------------~ The tall lean Earthman stepped up to the8!nterprise trio who had just beamed down onto his porch. "Welcome to the Kes sler Colonr.' gentlemen, " he greeted them. "I'm Leon Kessler at your service l' The man... DEDICATION This zi_e is dedicated to all STAR TREK raas who saw aad uaderstood that special quality ia the "Kirk/Spock Relatioash!p", aad to WILLIAM SHATNER .ad LEONARD NIMOY, who made it happe_. ? Copyright December, 1915, CONTACT. No reprlats...

  14. ARM - Contact Information

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    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 492air Comments? We would love to heargovInstrumentstdma Comments?HistoryArcticContact Information Related

  15. ARM - ENA Contacts

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    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 1,006Datastreamstwrcam40m Documentation DataDatastreamsxsaprhsrhi DocumentationAtlanticENA Contacts ENA Related

  16. Fermilab | Contact Fermilab

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  17. How to Contact NERSC

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  18. NREL: Technology Transfer - Contacts

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  19. SRNL LDRD - Program Contacts

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  20. Jefferson Lab Contacts

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  1. ARM - Ingest Contacts

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  2. ARM - TWP Contacts

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    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 3,625govInstrumentstdmadap Documentation TDMADAP :ProductsVaisalaAlaskaInstruments NSASteeringContacts TWP Related Links

  3. NETL Contact Information

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  4. Sandia Energy - Contact Us

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  5. FOR IMMEDIATE RELEASE CONTACT:

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  6. Transmission - Contact Information

    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 solidSynthesisAppliances » DataContact-Information-Transmission

  7. Transmission Contact Information

    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 solidSynthesisAppliances »Contact-Information Sign In About |

  8. Contact JLab | Jefferson Lab

    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,ARMFormsGas SeparationsRelevant toSite Map Homehome /Contact Information

  9. Contact Us - SRSCRO

    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,ARMFormsGas SeparationsRelevant toSite Map HomehomeContact Us

  10. Contacts / Hours - Hanford Site

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  11. Contacts | Jefferson Lab

    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,ARMFormsGas SeparationsRelevant toSite MapContact UsP-27 Group News Media

  12. ARM - AMF Contacts

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

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  13. Media Contact: Will Callicott

    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 Science (SC)Integrated Codes |IsLove Your Home andDispositionMechanical R&D Contact: Will

  14. For Immediate Release Contacts

    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. DOEThe Bonneville Power AdministrationField8,Dist.New MexicoFinancingProofWorkingEnergyGo modelP e r f Contacts

  15. For Immediate Release Contacts

    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. DOEThe Bonneville Power AdministrationField8,Dist.New MexicoFinancingProofWorkingEnergyGo modelP e r f ContactsFor

  16. Large aperture optical switching devices

    SciTech Connect (OSTI)

    Goldhar, J.; Henesian, M.A.

    1983-12-12T23:59:59.000Z

    We have developed a new approach to constructing large aperture optical switches for next generation inertial confinement fusion lasers. A transparent plasma electrode formed in low pressure ionized gas acts as a conductive coating to allow the uniform charging of the optical faces of an electro-optic material. In this manner large electric fields can be applied longitudinally to large aperture, high aspect ratio Pockels cells. We propose a four-electrode geometry to create the necessary high conductivity plasma sheets, and have demonstrated fast (less than 10 nsec) switching in a 5x5 cm aperture KD*P Pockels cell with such a design. Detaid modelling of Pockels cell performance with plasma electrodes has been carried out for 15 and 30 cm aperture designs.

  17. Switch for Good Community Program

    SciTech Connect (OSTI)

    Crawford, Tabitha; Amran, Martha

    2013-11-19T23:59:59.000Z

    Switch4Good is an energy-savings program that helps residents reduce consumption from behavior changes; it was co-developed by Balfour Beatty Military Housing Management (BB) and WattzOn in Phase I of this grant. The program was offered at 11 Navy bases. Three customer engagement strategies were evaluated, and it was found that Digital Nudges (a combination of monthly consumption statements with frequent messaging via text or email) was most cost-effective.

  18. Fast superconducting magnetic field switch

    DOE Patents [OSTI]

    Goren, Yehuda (Mountain View, CA); Mahale, Narayan K. (The Woodlands, TX)

    1996-01-01T23:59:59.000Z

    The superconducting magnetic switch or fast kicker magnet is employed with electron stream or a bunch of electrons to rapidly change the direction of flow of the electron stream or bunch of electrons. The apparatus employs a beam tube which is coated with a film of superconducting material. The tube is cooled to a temperature below the superconducting transition temperature and is subjected to a constant magnetic field which is produced by an external dc magnet. The magnetic field produced by the dc magnet is less than the critical field for the superconducting material, thus, creating a Meissner Effect condition. A controllable fast electromagnet is used to provide a magnetic field which supplements that of the dc magnet so that when the fast magnet is energized the combined magnetic field is now greater that the critical field and the superconducting material returns to its normal state allowing the magnetic field to penetrate the tube. This produces an internal field which effects the direction of motion and of the electron stream or electron bunch. The switch can also operate as a switching mechanism for charged particles.

  19. CONTACTS FOR INFORMATION MANAGEMENT: Forms, Information Collection...

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

    CONTACTS FOR INFORMATION MANAGEMENT: Forms, Information Collection, Privacy & Records CONTACTS FOR INFORMATION MANAGEMENT: Forms, Information Collection, Privacy & Records Troy...

  20. A magnetically switched kicker for proton extraction

    SciTech Connect (OSTI)

    Dinkel, J.; Biggs, J.

    1989-03-01T23:59:59.000Z

    The application of magnetic current amplification and switching techniques to the generation of precise high current pulses for switching magnets is described. The square loop characteristic of Metglas tape wound cores at high excitation levels provides excellent switching characteristics for microsecond pulses. The rugged and passive nature of this type pulser makes it possible to locate the final stages of amplification at the load for maximum efficiency. 12 refs., 8 figs.

  1. Method for forming metal contacts

    DOE Patents [OSTI]

    Reddington, Erik; Sutter, Thomas C; Bu, Lujia; Cannon, Alexandra; Habas, Susan E; Curtis, Calvin J; Miedaner, Alexander; Ginley, David S; Van Hest, Marinus Franciscus Antonius Maria

    2013-09-17T23:59:59.000Z

    Methods of forming metal contacts with metal inks in the manufacture of photovoltaic devices are disclosed. The metal inks are selectively deposited on semiconductor coatings by inkjet and aerosol apparatus. The composite is heated to selective temperatures where the metal inks burn through the coating to form an electrical contact with the semiconductor. Metal layers are then deposited on the electrical contacts by light induced or light assisted plating.

  2. Contact Us | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsNovember 13, 2014 BuildingEnergyEnergyConsortium SupportContactContactContact

  3. Multi-megavolt low jitter multistage switch

    DOE Patents [OSTI]

    Humphreys, D.R.; Penn, K.J. Jr.

    1985-06-19T23:59:59.000Z

    It is one object of the present invention to provide a multistage switch capable of holding off numerous megavolts, until triggered, from a particle beam accelerator of the type used for inertial confinement fusion. The invention provides a multistage switch having low timing jitter and capable of producing multiple spark channels for spreading current over a wider area to reduce electrode damage and increase switch lifetime. The switch has fairly uniform electric fields and a short spark gap for laser triggering and is engineered to prevent insulator breakdowns.

  4. High-index-contrast electromechanical optical switches

    E-Print Network [OSTI]

    Bryant, Reginald (Reginald Eugene), 1978-

    2011-01-01T23:59:59.000Z

    System developers are looking to replace protocol-dependent, bandwidth-limited optical networks with intelligent optically-transparent integrated photonic networks. Several electromechanical optical switches are explored ...

  5. UH Mnoa Contacts: Campus Security

    E-Print Network [OSTI]

    of the Gender Equity Specialist 956-9499 www.manoa.hawaii.edu/mco/Gender_Equity/ Off-campus Contacts: Honolulu

  6. Sandia National Laboratories: SSLS Contacts

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

    Nuclear Energy photovoltaic Photovoltaics PV Renewable Energy solar Solar Energy solar power Solar Research Solid-State Lighting SSLS Connect Contact Us RSS Google+ Twitter...

  7. Contact | Photosynthetic Antenna Research Center

    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,ARMFormsGas SeparationsRelevant toSite MapContact Us ContactContactContact

  8. Multiprocessor switch with selective pairing

    DOE Patents [OSTI]

    Gara, Alan; Gschwind, Michael K; Salapura, Valentina

    2014-03-11T23:59:59.000Z

    System, method and computer program product for a multiprocessing system to offer selective pairing of processor cores for increased processing reliability. A selective pairing facility is provided that selectively connects, i.e., pairs, multiple microprocessor or processor cores to provide one highly reliable thread (or thread group). Each paired microprocessor or processor cores that provide one highly reliable thread for high-reliability connect with a system components such as a memory "nest" (or memory hierarchy), an optional system controller, and optional interrupt controller, optional I/O or peripheral devices, etc. The memory nest is attached to a selective pairing facility via a switch or a bus

  9. Optical switching system and method

    DOE Patents [OSTI]

    Ranganathan, Radha (N. Tonawanda, NY); Gal, Michael (Engadine, AU); Taylor, P. Craig (Salt Lake City, UT)

    1992-01-01T23:59:59.000Z

    An optically bistable device is disclosed. The device includes a uniformly thick layer of amorphous silicon to constitute a Fabry-Perot chamber positioned to provide a target area for a probe beam. The probe beam has a maximum energy less than the energy band gap of the amorphous semiconductor. In a preferred embodiment, a multilayer dielectric mirror is positioned on the Fabry-Perot chamber to increase the finesse of switching of the device. The index of refraction of the amorphous material is thermally altered to alter the transmission of the probe beam.

  10. Microwave-triggered laser switch

    DOE Patents [OSTI]

    Piltch, Martin S. (Los Alamos, NM)

    1984-01-01T23:59:59.000Z

    A high-repetition rate switch for delivering short duration, high-power electrical pulses from a pulsed-charged dc power supply. The present invention utilizes a microwave-generating device such as a magnetron that is capable of producing high-power pulses at high-pulse repetition rates and fast-pulse risetimes for long periods with high reliability. The rail-gap electrodes provide a large surface area that reduces induction effects and minimizes electrode erosion. Additionally, breakdown is initiated in a continuous geometric fashion that also increases operating lifetime of the device.

  11. Microwave-triggered laser switch

    DOE Patents [OSTI]

    Piltch, M.S.

    1982-05-19T23:59:59.000Z

    A high-repetition rate switch is described for delivering short duration, high-powered electrical pulses from a pulsed-charged dc power supply. The present invention utilizes a microwave-generating device such as a magnetron that is capable of producing high-power pulses at high-pulse repetition rates and fast-pulse risetimes for long periods with high reliability. The rail-gap electrodes provide a large surface area that reduces induction effects and minimizes electrode erosion. Additionally, breakdown is initiated in a continuous geometric fashion that also increases operating lifetime of the device.

  12. Switch LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolar Jump to:Holdings Co08.0 - Warehouses 73.0 -SwiftSwissvale,Switch LLC

  13. Outlook export contacts and groups Migrate Outlook Contacts to gmail

    E-Print Network [OSTI]

    Aalberts, Daniel P.

    Outlook export contacts and groups Migrate Outlook Contacts to gmail 1. In Outlook 2007 on the File menu, click Import and Export. 1a. For Outlook 2010 on the File menu, click Open, then Import 2. Click Export to a file, and then click Next. #12;3. Click Comma Separated Values (Windows), and then click Next

  14. Ames Lab 101: Ultrafast Magnetic Switching

    ScienceCinema (OSTI)

    Jigang Wang

    2013-06-05T23:59:59.000Z

    Ames Laboratory physicists have found a new way to switch magnetism that is at least 1000 times faster than currently used in magnetic memory technologies. Magnetic switching is used to encode information in hard drives, magnetic random access memory and other computing devices. The discovery potentially opens the door to terahertz and faster memory speeds.

  15. PBC: A Partially Buffered Crossbar Packet Switch

    E-Print Network [OSTI]

    Kuzmanov, Georgi

    fabric is widely used as the interconnect of high-performance packet switches due to its low cost-performance packet switches because of its low cost and scalability. As a result, the vast majority and scalability. There are two main variants of the crossbar fabric: unbuffered and internally buffered. On one

  16. Asynchronous vs Synchronous Input-Queued Switches

    E-Print Network [OSTI]

    of high-performance switches. 1 INTRODUCTION A vast technical literature exists on input-queued (IQ to performance losses in comparison with synchronous cell switching, these losses are limited, and may be smaller than the losses due to the above-mentioned segmenta- tion/reassembly overheads. In real scenarios

  17. The Generalized Switched Accounting or Conduction

    E-Print Network [OSTI]

    The Generalized Switched Accounting or Conduction Isaac Zafrany1 1 Technical Support Avant modeling and simulation of PWM converters was extended to include conduction losses. The method covers losses due to the inductor's resistance and due to the voltage drops across the switch and the diode

  18. Seismic switch for strong motion measurement

    DOE Patents [OSTI]

    Harben, Philip E. (Oakley, CA); Rodgers, Peter W. (Santa Barbara, CA); Ewert, Daniel W. (Patterson, CA)

    1995-01-01T23:59:59.000Z

    A seismic switching device that has an input signal from an existing microseismic station seismometer and a signal from a strong motion measuring instrument. The seismic switch monitors the signal level of the strong motion instrument and passes the seismometer signal to the station data telemetry and recording systems. When the strong motion instrument signal level exceeds a user set threshold level, the seismometer signal is switched out and the strong motion signal is passed to the telemetry system. The amount of time the strong motion signal is passed before switching back to the seismometer signal is user controlled between 1 and 15 seconds. If the threshold level is exceeded during a switch time period, the length of time is extended from that instant by one user set time period.

  19. Seismic switch for strong motion measurement

    DOE Patents [OSTI]

    Harben, P.E.; Rodgers, P.W.; Ewert, D.W.

    1995-05-30T23:59:59.000Z

    A seismic switching device is described that has an input signal from an existing microseismic station seismometer and a signal from a strong motion measuring instrument. The seismic switch monitors the signal level of the strong motion instrument and passes the seismometer signal to the station data telemetry and recording systems. When the strong motion instrument signal level exceeds a user set threshold level, the seismometer signal is switched out and the strong motion signal is passed to the telemetry system. The amount of time the strong motion signal is passed before switching back to the seismometer signal is user controlled between 1 and 15 seconds. If the threshold level is exceeded during a switch time period, the length of time is extended from that instant by one user set time period. 11 figs.

  20. Modeling Combustion Control for High Power Diesel Mode Switching...

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

    Combustion Control for High Power Diesel Mode Switching Modeling Combustion Control for High Power Diesel Mode Switching Poster presentation given at the 16th Directions in...

  1. Robust Diamond-Based RF Switch Yields Enhanced Communication...

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

    Robust Diamond-Based RF Switch Yields Enhanced Communication Capabilities Technology available for licesning: A radio frequency (RF) microelectromechanical system (MEMS) switch...

  2. Dynamic Switching of the Spin Circulation in Tapered Magnetic...

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

    Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks Print Monday, 22 April 2013 12:09...

  3. Flipping the switch on magnetism in strontium titanate

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

    Flipping the switch on magnetism in strontium titanate Flipping the switch on magnetism in strontium titanate Researchers have found a way to magnetize this material using light,...

  4. Switch on Clean Energy Activity Book | Department of Energy

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

    Switch on Clean Energy Activity Book Switch on Clean Energy Activity Book Games and activity book about energy efficiency and renewable energy technologies for kids....

  5. Solar cell with back side contacts

    DOE Patents [OSTI]

    Nielson, Gregory N; Okandan, Murat; Cruz-Campa, Jose Luis; Resnick, Paul J; Wanlass, Mark Woodbury; Clews, Peggy J

    2013-12-24T23:59:59.000Z

    A III-V solar cell is described herein that includes all back side contacts. Additionally, the positive and negative electrical contacts contact compoud semiconductor layers of the solar cell other than the absorbing layer of the solar cell. That is, the positive and negative electrical contacts contact passivating layers of the solar cell.

  6. Contact Information | The Ames Laboratory

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation and Contact Information ContactContact

  7. Contact Us | The Ames Laboratory

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation andInformationContact UsContact UsContact Us

  8. Contact Us | The Ames Laboratory

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws | NationalContactAboutContactSandiaContact

  9. Protein folding using contact maps

    E-Print Network [OSTI]

    Michele Vendruscolo; Eytan Domany

    1999-01-21T23:59:59.000Z

    We present the development of the idea to use dynamics in the space of contact maps as a computational approach to the protein folding problem. We first introduce two important technical ingredients, the reconstruction of a three dimensional conformation from a contact map and the Monte Carlo dynamics in contact map space. We then discuss two approximations to the free energy of the contact maps and a method to derive energy parameters based on perceptron learning. Finally we present results, first for predictions based on threading and then for energy minimization of crambin and of a set of 6 immunoglobulins. The main result is that we proved that the two simple approximations we studied for the free energy are not suitable for protein folding. Perspectives are discussed in the last section.

  10. Contact Us | Argonne National Laboratory

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

    Contact Us Address and phone Argonne National Laboratory 9700 S. Cass Avenue Lemont, IL 60439. Phone: 630252-2000 For members of the news media News releases online Argonne media...

  11. CONTACT INFORMATION Roxana Jo Hickey

    E-Print Network [OSTI]

    Forney, Larry J.

    CONTACT INFORMATION Roxana Jo Hickey Ph.D. Student, Bioinformatics & Computational Biology.D. Student, Bioinformatics & Computational Biology present University of Idaho, Moscow, ID Major Professor. Zaid Abdo University of Idaho (MATH 451) Spring 2011 Computational Biology: Sequence Analysis, Dr

  12. Method for lubricating contacting surfaces

    DOE Patents [OSTI]

    Dugger, Michael T. (Tijeras, NM); Ohlhausen, James A. (Albuquerque, NM); Asay, David B. (Boalsburg, PA); Kim, Seong H. (State College, PA)

    2011-12-06T23:59:59.000Z

    A method is provided for tribological lubrication of sliding contact surfaces, where two surfaces are in contact and in motion relative to each other, operating in a vapor-phase environment containing at least one alcohol compound at a concentration sufficiently high to provide one monolayer of coverage on at least one of the surfaces, where the alcohol compound continuously reacts at the surface to provide lubrication.

  13. Contact Information | The Ames Laboratory

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation and Contact Information Contact

  14. Contact Us | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsNovember 13, 2014 BuildingEnergyEnergyConsortium SupportContactContact Us

  15. Contact Us | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsNovember 13, 2014 BuildingEnergyEnergyConsortium SupportContactContact

  16. Coordination and Lock-In: Competition with Switching Costs

    E-Print Network [OSTI]

    Sadoulet, Elisabeth

    Coordination and Lock-In: Competition with Switching Costs and Network E ects Part II of IV Switching Costs Section December 2004 the latest version of this paper, and related material, will be at www Switching Costs and Competition 2.1 Introduction A consumer faces a switching cost between sellers when

  17. Theory and inference for a Markov switching GARCH model

    E-Print Network [OSTI]

    Nesterov, Yurii

    2007/55 Theory and inference for a Markov switching GARCH model Luc Bauwens, Arie Preminger and Jeroen V.K. Rombouts #12;CORE DISCUSSION PAPER 2007/55 Theory and inference for a Markov switching GARCH-switching GARCH model (MS-GARCH) wherein the conditional mean and variance switch in time from one GARCH process

  18. Optimal control of controllable switched systems

    E-Print Network [OSTI]

    Rinehart, Michael David

    2005-01-01T23:59:59.000Z

    Many of the existing techniques for controlling switched systems either require the solution to a complex optimization problem or significant sacrifices to either stability or performance to offer practical controllers. ...

  19. Value iteration for (switched) homogeneous systems

    E-Print Network [OSTI]

    Dahleh, Munther A.

    In this note, we prove that dynamic programming value iteration converges uniformly for discrete-time homogeneous systems and continuous-time switched homogeneous systems. For discrete-time homogeneous systems, rather than ...

  20. Clause chaining, switch reference and coordination

    E-Print Network [OSTI]

    Nonato, Rafael

    2014-01-01T23:59:59.000Z

    In this thesis I ponder over a constellation of phenomena that revolve around switch reference and coordination, drawing mainly on their instantiation in Kisedje (Je, Brazil). I start by investigating Klsedje's case system. ...

  1. Monetary Interventions in Crowdsourcing Task Switching

    E-Print Network [OSTI]

    Chen, Yiling

    intervention treatments No Bonus Switch Bonus Repetition Bonus × 15 experimental ­ Accuracy ­ Innately compete with each other · Performance-contingent bonuses ­ Receive bonus in a task if the answer is correct and the reaction time

  2. Industrial Fuel Switching - Emerging NGL Opportunities 

    E-Print Network [OSTI]

    Cascone, R.

    2004-01-01T23:59:59.000Z

    INDUSTRIAL FUEL SWITCHING - EMERGING NGL OPPORTUNITIES Ron Cascone Manager Special Projects, Utilities and Environmental Nexant, Inc. White Plains, NY ABSTRACT Removing butanes and pentanes from gasoline to meet local... feedstocks, convert them to alternative fuels, or sell them as heating fuels. Industrial fuel users can switch from fuel oil, natural gas or LPG for short periods to these clean and/or more economic fuels. Current regulations will necessitate removing...

  3. Mining Protein Contact Maps Jingjing Hu

    E-Print Network [OSTI]

    Bystroff, Chris

    Mining Protein Contact Maps Jingjing Hu , Xiaolan Shen , Yu Shao ˇ , Chris Bystroff matrix of pairwise, inter-residue contacts, or "contact map". The contact map provides a host of use- ful information about the protein's structure. In this paper we de- scribe how data mining can be used to extract

  4. Improved Electrical Contact For Dowhhole Drilling Networks

    DOE Patents [OSTI]

    Hall, David R. (Provo, UT); Hall, Jr., H. Tracy (Provo, UT); Pixton, David S. (Lehi, UT); Dahlgren, Scott (Provo, UT); Fox, Joe (Spanish Fork, UT); Sneddon, Cameron (Provo, UT)

    2005-08-16T23:59:59.000Z

    An electrical contact system for transmitting information across tool joints while minimizing signal reflections that occur at the tool joints includes a first electrical contact comprising an annular resilient material. An annular conductor is embedded within the annular resilient material and has a surface exposed from the annular resilient material. A second electrical contact is provided that is substantially equal to the first electrical contact. Likewise, the second electrical contact has an annular resilient material and an annular conductor. The two electrical contacts configured to contact one another such that the annular conductors of each come into physical contact. The annular resilient materials of each electrical contact each have dielectric characteristics and dimensions that are adjusted to provide desired impedance to the electrical contacts.

  5. Non- contacting capacitive diagnostic device

    DOE Patents [OSTI]

    Ellison, Timothy

    2005-07-12T23:59:59.000Z

    A non-contacting capacitive diagnostic device includes a pulsed light source for producing an electric field in a semiconductor or photovoltaic device or material to be evaluated and a circuit responsive to the electric field. The circuit is not in physical contact with the device or material being evaluated and produces an electrical signal characteristic of the electric field produced in the device or material. The diagnostic device permits quality control and evaluation of semiconductor or photovoltaic device properties in continuous manufacturing processes.

  6. Contacts of space--times

    SciTech Connect (OSTI)

    Maia, M.D.

    1981-03-01T23:59:59.000Z

    The concept of contact between manifolds is applied to space--times of general relativity. For a given background space--time a contact approximation of second order is defined and interpreted both from the point of view of a metric pertubation and of a higher order tangent manifold. In the first case, an application to the high frequency gravitational wave hypothesis is suggested. In the second case, a constant curvature tangent bundle is constructed and suggested as a means to define a ten parameter local space--time symmetry.

  7. Contact Information | The Ames Laboratory

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation and Contact Information Contact Information

  8. Contact Us | The Ames Laboratory

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation andInformationContact UsContact Us

  9. Contact Us | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613PortsmouthBartlesvilleAbout » Contact Us Contact Us U.S. Department of Energy SunShot

  10. Contact Us | Department of Energy

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

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  11. Contact Us | Department of Energy

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

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  12. Contact Us | Department of Energy

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

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  13. Contact Us | Department of Energy

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

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  14. Contact Us | Department of Energy

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

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  15. Contact Us | Department of Energy

    Energy Savers [EERE]

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    Energy Savers [EERE]

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  17. Contact Us | ScienceCinema

    Office of Scientific and Technical Information (OSTI)

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  18. Contact Information | The Ames Laboratory

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

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  19. Contact Information | The Ames Laboratory

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws | NationalContact Information Contact

  20. Synthesis of Uniformly Ultimate Boundedness Switching Laws for Discrete-Time Uncertain Switched Linear Systems

    E-Print Network [OSTI]

    Sontag, Eduardo

    - cations in control of mechanical systems, process control, au- tomotive industry, power systems, aircraft variations and exterior disturbances are considered. The problem of synthesis of switching control laws that orchestrates switching between these subsystems. Properties of this type of model have been studied

  1. Video Switching in the Panopto Editor Video Switching in the Panopto Editor

    E-Print Network [OSTI]

    Benos, Panayiotis "Takis"

    Video Switching in the Panopto Editor Video Switching in the Panopto Editor In My Pitt Video (Panopto) you can control and edit which video streams the viewer sees by editing individual streams in the My Pitt Video (Panopto) Editor. Editing the primary video source will edit on all streams, editing

  2. Contact Resistance of Tri-layer Graphene Side Contacted with Nickel Jason Giuliani,1-3

    E-Print Network [OSTI]

    UG-34 Contact Resistance of Tri-layer Graphene Side Contacted with Nickel Electrodes.S.A. High contact resistance is a key problem in graphene-type device performance. In order to create, the contact properties of graphene devices requires further research. Nickel's high work-function and contact

  3. University Assessment Contacts Academic Units

    E-Print Network [OSTI]

    Escher, Christine

    .j.arp@oregonstate.edu 541-737-2331 Notes: Agricultural and Resource Economics Assessment Rep: Email: Phone: Penelope DiebelUniversity Assessment Contacts Academic Units COLLEGE OF AGRICULTURAL SCIENCES Assessment Rep.Capalbo@oregonstate.edu 541-737-5639 Notes: Agricultural Education and Agricultural Sciences Assessment Rep: Email: Phone

  4. Contact Symmetries and Hamiltonian Thermodynamics

    E-Print Network [OSTI]

    A. Bravetti; C. S. Lopez-Monsalvo; F. Nettel

    2015-02-22T23:59:59.000Z

    It has been shown that contact geometry is the proper framework underlying classical thermodynamics and that thermodynamic fluctuations are captured by an additional metric structure related to Fisher's Information Matrix. In this work we analyze several unaddressed aspects about the application of contact and metric geometry to thermodynamics. We consider here the Thermodynamic Phase Space and start by investigating the role of gauge transformations and Legendre symmetries for metric contact manifolds and their significance in thermodynamics. Then we present a novel mathematical characterization of first order phase transitions as equilibrium processes on the Thermodynamic Phase Space for which the Legendre symmetry is broken. Moreover, we use contact Hamiltonian dynamics to represent thermodynamic processes in a way that resembles the classical Hamiltonian formulation of conservative mechanics and we show that the relevant Hamiltonian coincides with the irreversible entropy production along thermodynamic processes. Therefore, we use such property to give a geometric definition of thermodynamically admissible fluctuations according to the Second Law of thermodynamics. Finally, we show that the length of a curve describing a thermodynamic process measures its entropy production.

  5. Electrical contact tool set station

    DOE Patents [OSTI]

    Byers, M.E.

    1988-02-22T23:59:59.000Z

    An apparatus is provided for the precise setting to zero of electrically conductive cutting tools used in the machining of work pieces. An electrically conductive cylindrical pin, tapered at one end to a small flat, rests in a vee-shaped channel in a base so that its longitudinal axis is parallel to the longitudinal axis of the machine's spindle. Electronic apparatus is connected between the cylindrical pin and the electrically conductive cutting tool to produce a detectable signal when contact between tool and pin is made. The axes of the machine are set to zero by contact between the cutting tool and the sides, end or top of the cylindrical pin. Upon contact, an electrical circuit is completed, and the detectable signal is produced. The tool can then be set to zero for that axis. Should the tool contact the cylindrical pin with too much force, the cylindrical pin would be harmlessly dislodged from the vee-shaped channel, preventing damage either to the cutting tool or the cylindrical pin. 5 figs.

  6. Ultrahigh density ferroelectric storage and lithography by high order ferroic switching

    DOE Patents [OSTI]

    Kalinin, Sergei V. (Knoxville, TN); Baddorf, Arthur P. (Knoxville, TN); Lee, Ho Nyung (Oak Ridge, TN); Shin, Junsoo (Knoxville, TN); Gruverman, Alexei L. (Raleigh, NC); Karapetian, Edgar (Malden, MA); Kachanov, Mark (Arlington, MA)

    2007-11-06T23:59:59.000Z

    A method for switching the direction of polarization in a relatively small domain in a thin-film ferroelectric material whose direction of polarization is oriented normal to the surface of the material involves a step of moving an electrically-chargeable tip into contact with the surface of the ferroelectric material so that the direction of polarization in a region adjacent the tip becomes oriented in a preselected direction relative to the surface of the ferroelectric material. The tip is then pressed against the surface of the ferroelectric material so that the direction of polarization of the ferroelectric material within the area of the ferroelectric material in contact with the tip is reversed under the combined effect of the compressive influence of the tip and electric bias.

  7. Magnetic switch for reactor control rod. [LMFBR

    DOE Patents [OSTI]

    Germer, J.H.

    1982-09-30T23:59:59.000Z

    A magnetic reed switch assembly is described for activating an electromagnetic grapple utilized to hold a control rod in position above a reactor core. In normal operation the magnetic field of a permanent magnet is short-circuited by a magnetic shunt, diverting the magnetic field away from the reed switch. The magnetic shunt is made of a material having a Curie-point at the desired release temperature. Above that temperature the material loses its ferromagnetic properties, and the magnetic path is diverted to the reed switch which closes and short-circuits the control circuit for the control rod electro-magnetic grapple which allows the control rod to drop into the reactor core for controlling the reactivity of the core.

  8. Magnetic switch for reactor control rod

    DOE Patents [OSTI]

    Germer, John H. (San Jose, CA)

    1986-01-01T23:59:59.000Z

    A magnetic reed switch assembly for activating an electromagnetic grapple utilized to hold a control rod in position above a reactor core. In normal operation the magnetic field of a permanent magnet is short-circuited by a magnetic shunt, diverting the magnetic field away from the reed switch. The magnetic shunt is made of a material having a Curie-point at the desired release temperature. Above that temperature the material loses its ferromagnetic properties, and the magnetic path is diverted to the reed switch which closes and short-circuits the control circuit for the control rod electromagnetic grapple which allows the control rod to drop into the reactor core for controlling the reactivity of the core.

  9. Compact high voltage solid state switch

    DOE Patents [OSTI]

    Glidden, Steven C.

    2003-09-23T23:59:59.000Z

    A compact, solid state, high voltage switch capable of high conduction current with a high rate of current risetime (high di/dt) that can be used to replace thyratrons in existing and new applications. The switch has multiple thyristors packaged in a single enclosure. Each thyristor has its own gate drive circuit that circuit obtains its energy from the energy that is being switched in the main circuit. The gate drives are triggered with a low voltage, low current pulse isolated by a small inexpensive transformer. The gate circuits can also be triggered with an optical signal, eliminating the trigger transformer altogether. This approach makes it easier to connect many thyristors in series to obtain the hold off voltages of greater than 80 kV.

  10. Micro electro mechanical system optical switching

    DOE Patents [OSTI]

    Thorson, Kevin J; Stevens, Rick C; Kryzak, Charles J; Leininger, Brian S; Kornrumpf, William P; Forman, Glenn A; Iannotti, Joseph A; Spahn, Olga B; Cowan, William D; Dagel, Daryl J

    2013-12-17T23:59:59.000Z

    The present disclosure includes apparatus, system, and method embodiments that provide micro electo mechanical system optical switching and methods of manufacturing switches. For example, one optical switch embodiment includes at least one micro electro mechanical system type pivot mirror structure disposed along a path of an optical signal, the structure having a mirror and an actuator, and the mirror having a pivot axis along a first edge and having a second edge rotatable with respect to the pivot axis, the mirror being capable of and arranged to be actuated to pivot betweeen a position parallel to a plane of an optical signal and a position substantially normal to the plane of the optical signal.

  11. Optically triggered high voltage switch network and method for switching a high voltage

    DOE Patents [OSTI]

    El-Sharkawi, Mohamed A. (Renton, WA); Andexler, George (Everett, WA); Silberkleit, Lee I. (Mountlake Terrace, WA)

    1993-01-19T23:59:59.000Z

    An optically triggered solid state switch and method for switching a high voltage electrical current. A plurality of solid state switches (350) are connected in series for controlling electrical current flow between a compensation capacitor (112) and ground in a reactive power compensator (50, 50') that monitors the voltage and current flowing through each of three distribution lines (52a, 52b and 52c), which are supplying three-phase power to one or more inductive loads. An optical transmitter (100) controlled by the reactive power compensation system produces light pulses that are conveyed over optical fibers (102) to a switch driver (110') that includes a plurality of series connected optical triger circuits (288). Each of the optical trigger circuits controls a pair of the solid state switches and includes a plurality of series connected resistors (294, 326, 330, and 334) that equalize or balance the potential across the plurality of trigger circuits. The trigger circuits are connected to one of the distribution lines through a trigger capacitor (340). In each switch driver, the light signals activate a phototransistor (300) so that an electrical current flows from one of the energy reservoir capacitors through a pulse transformer (306) in the trigger circuit, producing gate signals that turn on the pair of serially connected solid state switches (350).

  12. Manufacturing fuel-switching capability, 1988

    SciTech Connect (OSTI)

    Not Available

    1991-09-01T23:59:59.000Z

    Historically, about one-third of all energy consumed in the United States has been used by manufacturers. About one-quarter of manufacturing energy is used as feedstocks and raw material inputs that are converted into nonenergy products; the remainder is used for its energy content. During 1988, the most recent year for which data are available, manufacturers consumed 15.5 quadrillion British thermal units (Btu) of energy to produce heat and power and to generate electricity. The manufacturing sector also has widespread capabilities to switch from one fuel to another for either economic or emergency reasons. There are numerous ways to define fuel switching. For the purposes of the Manufacturing Energy Consumption Survey (MECS), fuel switching is defined as the capability to substitute one energy source for another within 30 days with no significant modifications to the fuel-consuming equipment, while keeping production constant. Fuel-switching capability allows manufacturers substantial flexibility in choosing their mix of energy sources. The consumption of a given energy source can be maximized if all possible switching into that energy source takes place. The estimates in this report are based on data collected on the 1988 Manufacturing Energy Consumption Survey (MECS), Forms 846 (A through C). The EIA conducts this national sample survey of manufacturing energy consumption on a triennial basis. The MECS is the only comprehensive source of national-level data on energy-related information for the manufacturing industries. The MECS was first conducted in 1986 to collect data for 1985. This report presents information on the fuel-switching capabilities of manufacturers in 1988. This report is the second of a series based on the 1988 MECS. 8 figs., 31 tabs.

  13. Solar cell contact formation using laser ablation

    DOE Patents [OSTI]

    Harley, Gabriel; Smith, David D.; Cousins, Peter John

    2014-07-22T23:59:59.000Z

    The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline materiat layer; and forming conductive contacts in the plurality of contact holes.

  14. Solar cell contact formation using laser ablation

    DOE Patents [OSTI]

    Harley, Gabriel; Smith, David; Cousins, Peter

    2012-12-04T23:59:59.000Z

    The formation of solar cell contacts using a laser is described. A method of fabricating a back-contact solar cell includes forming a poly-crystalline material layer above a single-crystalline substrate. The method also includes forming a dielectric material stack above the poly-crystalline material layer. The method also includes forming, by laser ablation, a plurality of contacts holes in the dielectric material stack, each of the contact holes exposing a portion of the poly-crystalline material layer; and forming conductive contacts in the plurality of contact holes.

  15. CONTACT

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

    by high-energy neutrons produced by naturally occurring cosmic radiation. To test the reliability and vulnerability of electronics, the semiconductor industry and other com-...

  16. Contact

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation and UncertaintyPWR[NiFe]-hydrogenase CAMD

  17. A Taxonomy of Rerouting in Circuit-Switched Networks

    E-Print Network [OSTI]

    Wong, Eric Wing-Ming

    A Taxonomy of Rerouting in Circuit-Switched Networks Eric W. M. Wong and Andy K. M. Chan, City presents a taxonomy of rerouting in circuit- switched networks showing the various ways rerouting can

  18. Carbon nano-relays for low power switching

    E-Print Network [OSTI]

    Milaninia, Kaveh Mehdi

    2009-01-01T23:59:59.000Z

    In this thesis two unique carbon based nanoelectromechanical switches or carbon nano-relays are demonstrated as a toolkit for investigating NEMs based low power switching. The first is a vertical carbon nano-relay, consisting ...

  19. Remedial Action Contacts Directory - 1997

    SciTech Connect (OSTI)

    NONE

    1997-05-01T23:59:59.000Z

    This document, which was prepared for the US Department of Energy (DOE) Office of Environmental Restoration (ER), is a directory of 2628 individuals interested or involved in environmental restoration and/or remedial actions at radioactively contaminated sites. This directory contains a list of mailing addresses and phone numbers of DOE operations, area, site, project, and contractor offices; an index of DOE operations, area, site, project, and contractor office sorted by state; a list of individuals, presented by last name, facsimile number, and e-mail address; an index of affiliations presented alphabetically, with individual contacts appearing below each affiliation name; and an index of foreign contacta sorted by country and affiliation. This document was generated from the Remedial Action Contacts Database, which is maintained by the Remedial Action Program Information Center (RAPIC).

  20. Contact Us | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsNovember 13, 2014 BuildingEnergyEnergyConsortium SupportContact

  1. Clean Cities Program Contacts (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-03-01T23:59:59.000Z

    This fact sheet provides contact information for program staff of the U.S. Department of Energy's Clean Cities program, as well as contact information for the nearly 100 local Clean Cities coalitions across the country.

  2. University of Michigan -Traveler Contact Information Name __________________________________

    E-Print Network [OSTI]

    Eustice, Ryan

    University of Michigan - Traveler Contact Information Name __________________________________ Phone __________________________________ Email __________________________________ University of Michigan/Clinic __________________________________ Address __________________________________ Phone __________________________________ University of Michigan

  3. Optimal switching control design for polynomial systems: an LMI approach

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Optimal switching control design for polynomial systems: an LMI approach Didier Henrion1 formulate the switching design problem as an optimal control problem which is then relaxed to a linear to the design of optimal switching sequences for polynomial dynamical systems with state constraints. We

  4. Energy and Switch Area Optimizations for FPGA Global Routing Architectures

    E-Print Network [OSTI]

    Fainman, Yeshaiahu

    13 Energy and Switch Area Optimizations for FPGA Global Routing Architectures YI ZHU, YUANFANG HU and wire style optimization, to reduce the energy and switch area of FPGA global routing architectures achieve up to 10% to 15% energy savings and up to 20% switch area savings in average for a set of seven

  5. A Brain-Switch using Riemannian Geometry A. Barachant1

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    A Brain-Switch using Riemannian Geometry A. Barachant1 , S. Bonnet1 , M. Congedo2 , C. Jutten2 1 the issue of asynchronous brain-switch. The detection of a specific brain pattern from the ongoing EEG-time EEG segments contain all the desired information. Such a brain-switch is valuable as it is easy to set

  6. Optimal Control of Switched Hybrid Systems: A Brief Survey

    E-Print Network [OSTI]

    Antsaklis, Panos

    Optimal Control of Switched Hybrid Systems: A Brief Survey Technical Report of the ISIS Group FengZhu and Panos J. Antsaklis, "Optimal Control of Switched Hybrid Systems: a Brief Survey," ISIS Technical Report ISIS-2013-007, July 2013. #12;1 Optimal Control of Switched Hybrid Systems: A Brief Survey

  7. Optimal Control of Switched Hybrid Systems: A Brief Survey

    E-Print Network [OSTI]

    Antsaklis, Panos

    Optimal Control of Switched Hybrid Systems: A Brief Survey Technical Report of the ISIS Group;1 Optimal Control of Switched Hybrid Systems: A Brief Survey Abstract This paper surveys recent results in the field of optimal control of hybrid and switched systems. We summarize recent results that use different

  8. Optimal Control of Switched Hybrid Systems: A Brief Survey

    E-Print Network [OSTI]

    Antsaklis, Panos

    Optimal Control of Switched Hybrid Systems: A Brief Survey Technical Report of the ISIS Group;1 Optimal Control of Switched Hybrid Systems: A Brief Survey Feng Zhu and Panos J. Antsaklis Department a few. The problem of determining optimal control laws for hybrid systems and in particular for switched

  9. Heritable Stochastic Switching Revealed by Single-Cell Genealogy

    E-Print Network [OSTI]

    van Oudenaarden, Alexander

    Heritable Stochastic Switching Revealed by Single-Cell Genealogy Benjamin B. Kaufmann1,2[ , Qiong switching revealed by single-cell genealogy. PLoS Biol 5(9): e239. doi:10.1371/ journal.pbio.0050239 measurements of phenotype stability, switching, and herit- ability are rare, both because detailed genealogical

  10. An Optical Interconnection Architecture for Large Packet Switches

    E-Print Network [OSTI]

    reliability concerns due to the large number of active components in the switch fabric. Routers with optical to consider the limits imposed by electronic technology; in particular, it must take into account power not only solutions that make use of optics inside electronic switches but that also switching architectures

  11. RF-MEMS capacitive switches with high reliability

    DOE Patents [OSTI]

    Goldsmith, Charles L.; Auciello, Orlando H.; Carlisle, John A.; Sampath, Suresh; Sumant, Anirudha V.; Carpick, Robert W.; Hwang, James; Mancini, Derrick C.; Gudeman, Chris

    2013-09-03T23:59:59.000Z

    A reliable long life RF-MEMS capacitive switch is provided with a dielectric layer comprising a "fast discharge diamond dielectric layer" and enabling rapid switch recovery, dielectric layer charging and discharging that is efficient and effective to enable RF-MEMS switch operation to greater than or equal to 100 billion cycles.

  12. Thermionic converter in load-switching mode

    SciTech Connect (OSTI)

    Mendel'baum, M.A.; Es'kov, V.D.

    1983-01-01T23:59:59.000Z

    An electrical equivalent circuit is proposed for a thermionic electrogenerating element. It is suitable for calculation of transients in load-switching mode. Formulas are given for estimating circuit parameters. A sample numerical calculation is given for the transient between no-load and short-circuit regimes. The results may be employed to identify experimental data in the frequency domain.

  13. Optically initiated silicon carbide high voltage switch

    DOE Patents [OSTI]

    Caporaso, George J. (Livermore, CA); Sampayan, Stephen E. (Manteca, CA); Sullivan, James S. (Livermore, CA); Sanders; David M. (Livermore, CA)

    2011-02-22T23:59:59.000Z

    An improved photoconductive switch having a SiC or other wide band gap substrate material, such as GaAs and field-grading liners composed of preferably SiN formed on the substrate adjacent the electrode perimeters or adjacent the substrate perimeters for grading the electric fields.

  14. Smart Grid Application of Optimal Transmission Switching

    E-Print Network [OSTI]

    Ferris, Michael C.

    ;6 Introduction continued Electric Transmission Network Flow Problem Optimal Power Flow (OPF) AlternatingSmart Grid Application of Optimal Transmission Switching By, Kory W. Hedman, et al.* University (Professor, UC Berkeley) #12;2 Motivation Co-optimize transmission topology and generation dispatch

  15. All-optical discrete vortex switch

    SciTech Connect (OSTI)

    Desyatnikov, Anton S. [Nonlinear Physics Center, Research School of Physics and Engineering, Australian National University, Canberra, ACT 0200 (Australia); Dennis, Mark R. [H. H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL (United Kingdom); Ferrando, Albert [Interdisciplinary Modeling Group, InterTech and Departament d'Optica, Universitat de Valencia, E-46100 Burjassot (Spain)

    2011-06-15T23:59:59.000Z

    We introduce discrete vortex solitons and vortex breathers in circular arrays of nonlinear waveguides. The simplest vortex breather in a four-waveguide coupler is a nonlinear dynamic state changing its topological charge between +1 and -1 periodically during propagation. We find the stability domain for this solution and suggest an all-optical vortex switching scheme.

  16. A distributed bioremediation problem with modal switching

    E-Print Network [OSTI]

    Seidman, Thomas I.

    8/8/'98 A distributed bioremediation problem with modal switching Thomas I. Seidman Department conversion to an innocuous form: cometabolism) -- i.e., bioremediation. For some further exposition of the nature and significance of bioremediation as a practical application we refer the reader, e.g., to [2

  17. A thermodynamic switch for chromosome colocalization

    E-Print Network [OSTI]

    M. Nicodemi; B. Panning; A. Prisco

    2008-09-27T23:59:59.000Z

    A general model for the early recognition and colocalization of homologous DNA sequences is proposed. We show, on a thermodynamic ground, how the distance between two homologous DNA sequences is spontaneously regulated by the concentration and affinity of diffusible mediators binding them, which act as a switch between two phases corresponding to independence or colocalization of pairing regions.

  18. Switching dynamics in cholesteric blue phases

    E-Print Network [OSTI]

    A. Tiribocchi; G. Gonnella; D. Marenduzzo; E. Orlandini

    2011-03-30T23:59:59.000Z

    Blue phases are networks of disclination lines, which occur in cholesteric liquid crystals near the transition to the isotropic phase. They have recently been used for the new generation of fast switching liquid crystal displays. Here we study numerically the steady states and switching hydrodynamics of blue phase I (BPI) and blue phase II (BPII) cells subjected to an electric field. When the field is on, there are three regimes: for very weak fields (and strong anchoring at the boundaries) the blue phases are almost unaffected, for intermediate fields the disclinations twist (for BPI) and unzip (for BPII), whereas for very large voltages the network dissolves in the bulk of the cell. Interestingly, we find that a BPII cell can recover its original structure when the field is switched off, whereas a BPI cell is found to be trapped more easily into metastable configurations. The kinetic pathways followed during switching on and off entails dramatic reorganisation of the disclination networks. We also discuss the effect of changing the director field anchoring at the boundary planes and of varying the direction of the applied field.

  19. Ternary gas mixture for diffuse discharge switch

    DOE Patents [OSTI]

    Christophorou, Loucas G. (Oak Ridge, TN); Hunter, Scott R. (Oak Ridge, TN)

    1988-01-01T23:59:59.000Z

    A new diffuse discharge gas switch wherein a mixture of gases is used to take advantage of desirable properties of the respective gases. There is a conducting gas, an insulating gas, and a third gas that has low ionization energy resulting in a net increase in the number of electrons available to produce a current.

  20. Isolated and soft-switched power converter

    DOE Patents [OSTI]

    Peng, Fang Zheng (Knoxville, TN); Adams, Donald Joe (Knoxville, TN)

    2002-01-01T23:59:59.000Z

    An isolated and soft-switched power converter is used for DC/DC and DC/DC/AC power conversion. The power converter includes two resonant tank circuits coupled back-to-back through an isolation transformer. Each resonant tank circuit includes a pair of resonant capacitors connected in series as a resonant leg, a pair of tank capacitors connected in series as a tank leg, and a pair of switching devices with anti-parallel clamping diodes coupled in series as resonant switches and clamping devices for the resonant leg. The power converter is well suited for DC/DC and DC/DC/AC power conversion applications in which high-voltage isolation, DC to DC voltage boost, bidirectional power flow, and a minimal number of conventional switching components are important design objectives. For example, the power converter is especially well suited to electric vehicle applications and load-side electric generation and storage systems, and other applications in which these objectives are important. The power converter may be used for many different applications, including electric vehicles, hybrid combustion/electric vehicles, fuel-cell powered vehicles with low-voltage starting, remote power sources utilizing low-voltage DC power sources, such as photovoltaics and others, electric power backup systems, and load-side electric storage and generation systems.

  1. Asynchronous vs Synchronous Input-Queued Switches

    E-Print Network [OSTI]

    for the design of high-performance switches. I. INTRODUCTION A vast technical literature exists on input. Unfortunately the technical literature has largely neglected this situation, and concentrated the attention throughput, or to simpler scheduling. Even when the asynchronous operation leads to performance losses

  2. Interconnecting network for switching data packets and method for switching data packets

    DOE Patents [OSTI]

    Benner, Alan Frederic; Minkenberg, Cyriel Johan Agnes; Stunkel, Craig Brian

    2010-05-25T23:59:59.000Z

    The interconnecting network for switching data packets, having data and flow control information, comprises a local packet switch element (S1) with local input buffers (I(1,1) . . . I(1,y)) for buffering the incoming data packets, a remote packet switch element (S2) with remote input buffers (I(2,1) . . . I(2,y)) for buffering the incoming data packets, and data lines (L) for interconnecting the local and the remote packet switch elements (S1, S2). The interconnecting network further comprises a local and a remote arbiter (A1, A2) which are connected via control lines (CL) to the input buffers (I(1,1) . . . I(1,y), I(2,1) . . . I(2,y)), and which are formed such that they can provide that the flow control information is transmitted via the data lines (L) and the control lines (CL).

  3. Float level switch for a nuclear power plant containment vessel

    DOE Patents [OSTI]

    Powell, J.G.

    1993-11-16T23:59:59.000Z

    This invention is a float level switch used to sense rise or drop in water level in a containment vessel of a nuclear power plant during a loss of coolant accident. The essential components of the device are a guide tube, a reed switch inside the guide tube, a float containing a magnetic portion that activates a reed switch, and metal-sheathed, ceramic-insulated conductors connecting the reed switch to a monitoring system outside the containment vessel. Special materials and special sealing techniques prevent failure of components and allow the float level switch to be connected to a monitoring system outside the containment vessel. 1 figures.

  4. Float level switch for a nuclear power plant containment vessel

    DOE Patents [OSTI]

    Powell, James G. (Clifton Park, NY)

    1993-01-01T23:59:59.000Z

    This invention is a float level switch used to sense rise or drop in water level in a containment vessel of a nuclear power plant during a loss of coolant accident. The essential components of the device are a guide tube, a reed switch inside the guide tube, a float containing a magnetic portion that activates a reed switch, and metal-sheathed, ceramic-insulated conductors connecting the reed switch to a monitoring system outside the containment vessel. Special materials and special sealing techniques prevent failure of components and allow the float level switch to be connected to a monitoring system outside the containment vessel.

  5. Contact Us | Department of Energy

    Office of Environmental Management (EM)

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  6. Contact EPSCI | The Ames Laboratory

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  7. Contacts | National Nuclear Security Administration

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  8. Contact Us | Department of Energy

    Energy Savers [EERE]

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    Energy Savers [EERE]

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  11. Veteran's Contacts | Department of Energy

    Energy Savers [EERE]

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  12. Contact Information | The Ames Laboratory

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

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  13. Contact Information | The Ames Laboratory

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

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  14. contact | netl.doe.gov

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  15. contact | netl.doe.gov

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  16. contacts | netl.doe.gov

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  18. TPA Agency Contacts - Hanford Site

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  1. High-speed, sub-pull-in voltage MEMS switching.

    SciTech Connect (OSTI)

    Spahn, Olga Blum; Brewer, Steven; Olsson, Roy H.; Bogart, Gregory R.; Luck, David L.; Watts, Michael R.; Shaw, Michael J.; Nielson, Gregory N.; Resnick, Paul James; Tigges, Christopher P.; Grossetete, Grant David

    2008-01-01T23:59:59.000Z

    We have proposed and demonstrated MEMS switching devices that take advantage of the dynamic behavior of the MEMS devices to provide lower voltage actuation and higher switching speeds. We have explored the theory behind these switching techniques and have demonstrated these techniques in a range of devices including MEMS micromirror devices and in-plane parallel plate MEMS switches. In both devices we have demonstrated switching speeds under one microsecond which has essentially been a firm limit in MEMS switching. We also developed low-loss silicon waveguide technology and the ability to incorporate high-permittivity dielectric materials with MEMS. The successful development of these technologies have generated a number of new projects and have increased both the MEMS switching and optics capabilities of Sandia National Laboratories.

  2. Rolling Contact Fatigue of Ceramics

    SciTech Connect (OSTI)

    Wereszczak, Andrew A [ORNL; Wang, W. [Bournemouth University, Bournemouth, United Kingdom; Wang, Y. [Bournemouth University, Bournemouth, United Kingdom; Hadfield, M. [Bournemouth University, Bournemouth, United Kingdom; Kanematsu, W. [National Institute of Advanced Industrial Science and Technology, Japan; Kirkland, Timothy Philip [ORNL; Jadaan, Osama M. [University of Wisconsin, Platteville

    2006-09-01T23:59:59.000Z

    High hardness, low coefficient of thermal expansion and high temperature capability are properties also suited to rolling element materials. Silicon nitride (Si{sub 3}N{sub 4}) has been found to have a good combination of properties suitable for these applications. However, much is still not known about rolling contact fatigue (RCF) behavior, which is fundamental information to assess the lifetime of the material. Additionally, there are several test techniques that are employed internationally whose measured RCF performances are often irreconcilable. Due to the lack of such information, some concern for the reliability of ceramic bearings still remains. This report surveys a variety of topics pertaining to RCF. Surface defects (cracks) in Si{sub 3}N{sub 4} and their propagation during RCF are discussed. Five methods to measure RCF are then briefly overviewed. Spalling, delamination, and rolling contact wear are discussed. Lastly, methods to destructively (e.g., C-sphere flexure strength testing) and non-destructively identify potential RCF-limiting flaws in Si{sub 3}N{sub 4} balls are described.

  3. Flexoelectric switching in cholesteric blue phases

    E-Print Network [OSTI]

    A. Tiribocchi; M. E. Cates; G. Gonnella; D. Marenduzzo; E. Orlandini

    2013-03-25T23:59:59.000Z

    We present computer simulations of the response of a flexoelectric blue phase network, either in bulk or under confinement, to an applied field. We find a transition in the bulk between the blue phase I disclination network and a parallel array of disclinations along the direction of the applied field. Upon switching off the field, the system is unable to reconstruct the original blue phase but gets stuck in a metastable phase. Blue phase II is comparatively much less affected by the field. In confined samples, the anchoring at the walls and the geometry of the device lead to the stabilisation of further structures, including field-aligned disclination loops, splayed nematic patterns, and yet more metastable states. Our results are relevant to the understanding of the switching dynamics for a class of new, "superstable", blue phases which are composed of bimesogenic liquid crystals, as these materials combine anomalously large flexoelectric coefficients, and low or near-zero dielectric anisotropy.

  4. Gas mixture for diffuse-discharge switch

    DOE Patents [OSTI]

    Christophorou, L.G.; Carter, J.G.; Hunter, S.R.

    1982-08-31T23:59:59.000Z

    Gaseous medium in a diffuse-discharge switch of a high-energy pulse generator is formed of argon combined with a compound selected from the group consisting of CF/sub 4/, C/sub 2/F/sub 6/, C/sub 3/F/sub 8/, n-C/sub 4/F/sub 10/, WF/sub 6/, (CF/sub 3/)/sub 2/S and (CF/sub 3/)/sub 2/O.

  5. Model-based statistical estimation of Sandia RF ohmic switch dynamic operation form stroboscopic, x-ray imaging.

    SciTech Connect (OSTI)

    Diegert, Carl F.

    2006-12-01T23:59:59.000Z

    We define a new diagnostic method where computationally-intensive numerical solutions are used as an integral part of making difficult, non-contact, nanometer-scale measurements. The limited scope of this report comprises most of a due diligence investigation into implementing the new diagnostic for measuring dynamic operation of Sandia's RF Ohmic Switch. Our results are all positive, providing insight into how this switch deforms during normal operation. Future work should contribute important measurements on a variety of operating MEMS devices, with insights that are complimentary to those from measurements made using interferometry and laser Doppler methods. More generally, the work opens up a broad front of possibility where exploiting massive high-performance computers enable new measurements.

  6. Viscoelastic contact mechanics between randomly rough surfaces

    E-Print Network [OSTI]

    Michele Scaraggi; Bo N. J. Persson

    2014-06-27T23:59:59.000Z

    We present exact numerical results for the friction force and the contact area for a viscoelastic solid (rubber) in sliding contact with hard, randomly rough substrates. The rough surfaces are self-affine fractal with roughness over several decades in length scales. We calculate the contribution to the friction from the pulsating deformations induced by the substrate asperities. We also calculate how the area of real contact, $A(v,p) $, depends on the sliding speed $v$ and on the nominal contact pressure $p$, and we show how the contact area for any sliding speed can be obtained from a universal master curve $A(p)$. The numerical results are found to be in good agreement with the predictions of an analytical contact mechanics theory.

  7. Clean Cities Program Contacts (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-01-01T23:59:59.000Z

    This fact sheet contains contact information for program staff and coalition coordinators for the U.S. Department of Energy's Clean Cities program.

  8. Clean Cities Program Contacts (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-09-01T23:59:59.000Z

    This fact sheet contains contact information for program staff and coalition coordinators for the U.S. Department of Energy's Clean Cities program.

  9. Clean Cities Program Contacts (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-10-01T23:59:59.000Z

    This fact sheet contains contact information for program staff and coalition coordinators for the U.S. Department of Energy's Clean Cities program.

  10. BISON Contact Improvements CASL FY14 Report

    SciTech Connect (OSTI)

    B. W. Spencer; J. D. Hales; D. R. Gaston; D. A. Karpeev; R. L. Williamson; S. R. Novascone; D. M. Perez; R. J. Gardner; K. A. Gamble

    2014-09-01T23:59:59.000Z

    The BISON code is the foundation for multiple fuel performance modeling efforts, and is cur- rently under heavy development. For a variety of fuel forms, the effects of heat conduction across a gap and mechanical contact between components of a fuel system are very significant. It is thus critical that BISON have robust capabilities for enforcement of thermal and mechanical contact. BISON’s solver robustness has generally been quite good before mechanical contact between the fuel and cladding occurs, but there have been significant challenges obtaining converged so- lutions once that contact occurs and the solver begins to enforce mechanical contact constraints. During the current year, significant development effort has been focused on the enforcement of mechanical contact to provide improved solution robustness. In addition to this work to improve mechanical contact robustness, an investigation into ques- tionable results attributable to thermal contact has been performed. This investigation found that the order of integration typically used on the surfaces involved in thermal contact was not suffi- ciently high. To address this problem, a new option was provided to permit the use of a different integration order for surfaces, and new usage recommendations were provided.

  11. On the bipolar resistive-switching characteristics of Al?O?- and HfO?-based memory cells operated in the soft-breakdown regime

    SciTech Connect (OSTI)

    Goux, L., E-mail: gouxl@imec.be; Fantini, A.; Nigon, R.; Strangio, S.; Degraeve, R.; Kar, G.; Chen, Y. Y.; Jurczak, M. [imec, Kapeldreef 75, B-3001 Leuven (Belgium); Raghavan, N. [imec, Kapeldreef 75, B-3001 Leuven (Belgium); KU Leuven, Dept. Elektrotechniek ESAT-MICAS, B-3001 Leuven (Belgium); De Stefano, F.; Afanas'ev, V. V. [KU Leuven, Department of Physics and Astronomy, B-3001 Leuven (Belgium)

    2014-10-07T23:59:59.000Z

    In this article, we investigate extensively the bipolar-switching properties of Al?O?- and HfO?-based resistive-switching memory cells operated at low current down to <1 ?A. We show that the switching characteristics differ considerably from those typically reported for larger current range (>15 ?A), which we relate as intrinsic to soft-breakdown (SBD) regime. We evidence a larger impact of the used switching-oxide in this current range, due to lower density of oxygen-vacancy (V{sub o}) defects in the SBD regime. In this respect, deep resetting and large memory window may be achieved using the stoichiometric Al?O? material due to efficient V{sub o} annihilation, although no complete erasure of the conductive-filament (CF) is obtained. We finally emphasize that the conduction may be described by a quantum point-contact (QPC) model down to very low current level where only a few V{sub o} defects compose the QPC constriction. The large switching variability inherent to this latter aspect is mitigated by CF shape tuning through adequate engineering of an Al?O?\\HfO? bilayer.

  12. Switch Switch

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

    5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Mon Tue Wed Thu Fri Sat Sun Mon...

  13. Switch Switch

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

    XPP L345 BRESSLER,CHRISTIAN Femtosecond Spin State Changes - Implications for Photocatalysis David Fritz or Marco Cammarata CXI L352 ELMLUND,HANS SINGLE PARTICLE X RAY...

  14. Reducing Actuator Switchings for Motion Control of Autonomous Underwater Vehicles

    E-Print Network [OSTI]

    Smith, Ryan N.

    Reducing Actuator Switchings for Motion Control of Autonomous Underwater Vehicles Monique Chyba and energy minimization for AUVs). A major difficulty is to provide a formal estimation that compares

  15. 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.

  16. 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.

  17. The switching dynamics of the bacterial flagellar motor

    E-Print Network [OSTI]

    Siebe B. van Albada; Sorin Tanase-Nicola; Pieter Rein ten Wolde

    2008-11-14T23:59:59.000Z

    Many swimming bacteria are propelled by flagellar motors that stochastically switch between the clockwise and counterclockwise rotation direction. While the switching dynamics are one of the most important characteristics of flagellar motors, the mechanisms that control switching are poorly understood. We present a statistical-mechanical model of the flagellar rotary motor, which consists of a number of stator proteins that drive the rotation of a ring of rotor proteins, which in turn drives the rotation of a flagellar filament. At the heart of our model is the assumption that the rotor protein complex can exist in two conformational states corresponding to the two respective rotation directions, and that switching between these states depends on interactions with the stator proteins. This naturally couples the switching dynamics to the rotation dynamics, making the switch sensitive to torque and speed. Another key element of our model is that after a switching event, it takes time for the load to build up, due to polymorphic transitions of the filament. Our model predicts that this slow relaxation dynamics of the filament, in combination with the load dependence of the switching frequency, leads to a characteristic switching time, in agreement with recent observations.

  18. Single-crystalline monolayer and multilayer graphene nano switches

    SciTech Connect (OSTI)

    Li, Peng; Cui, Tianhong, E-mail: tcui@me.umn.edu [State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084 (China); Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Jing, Gaoshan [State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084 (China); Zhang, Bo; Sando, Shota [Department of Mechanical Engineering, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

    2014-03-17T23:59:59.000Z

    Growth of monolayer, bi-layer, and tri-layer single-crystalline graphene (SCG) using chemical vapor deposition method is reported. SCG's mechanical properties and single-crystalline nature were characterized and verified by atomic force microscope and Raman spectroscopy. Electro-mechanical switches based on mono- and bi-layer SCG were fabricated, and the superb properties of SCG enable the switches to operate at pull-in voltage as low as 1?V, and high switching speed about 100?ns. These devices exhibit lifetime without a breakdown of over 5000 cycles, far more durable than any other graphene nanoelectromechanical system switches reported.

  19. Modeling Combustion Control for High Power Diesel Mode Switching

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

    Directions in Engine-Efficiency and Emissions Research Conference 2010 Modeling Combustion Control for High Power Diesel Mode Switching Siddhartha Banerjee, Christopher J. Rutland...

  20. Contact micromechanics in granular media with clay

    SciTech Connect (OSTI)

    Ita, S.L.

    1994-08-01T23:59:59.000Z

    Many granular materials, including sedimentary rocks and soils, contain clay particles in the pores, grain contacts, or matrix. The amount and location of the clays and fluids can influence the mechanical and hydraulic properties of the granular material. This research investigated the mechanical effects of clay at grain-to-grain contacts in the presence of different fluids. Laboratory seismic wave propagation tests were conducted at ultrasonic frequencies using spherical glass beads coated with Montmorillonite clay (SWy-1) onto which different fluids were adsorbed. For all bead samples, seismic velocity increased and attenuation decreased as the contact stiffnesses increased with increasing stress demonstrating that grain contacts control seismic transmission in poorly consolidated and unconsolidated granular material. Coating the beads with clay added stiffness and introduced viscosity to the mechanical contact properties that increased the velocity and attenuation of the propagating seismic wave. Clay-fluid interactions were studied by allowing the clay coating to absorb water, ethyl alcohol, and hexadecane. Increasing water amounts initially increased seismic attenuation due to clay swelling at the contacts. Attenuation decreased for higher water amounts where the clay exceeded the plastic limit and was forced from the contact areas into the surrounding open pore space during sample consolidation. This work investigates how clay located at grain contacts affects the micromechanical, particularly seismic, behavior of granular materials. The need for this work is shown by a review of the effects of clays on seismic wave propagation, laboratory measurements of attenuation in granular media, and proposed mechanisms for attenuation in granular media.

  1. Contact Transition Control: An Experimental Study

    E-Print Network [OSTI]

    Stanford University

    Contact Transition Control: An Experimental Study James M. Hyde and Mark R. Cutkosky Center Successful control of contact transitions is an important capability of dextrous robotic manipulators. In this paper we examine several methods for controlling the transition from free motion to constrained motion

  2. Fuel Switching Strategies for the 1990s

    E-Print Network [OSTI]

    Cascone, R.

    , petroleum coke, waste hydrocarbons (such as recovered from lubricants), biomass, and in the near future, methanol and other oxygenates or alcohols. Coal may also conceivably be a long-term sWitching candidate when utilized in a number of advanced open... under mos t conditions, in a manner that generates less NO x than heavier fuels such as coal, coke, and residual oil. Achieving NO x reductions with the latter is often a matter of capital investments and operating costs in either combustion...

  3. GaAs photoconductive semiconductor switch

    DOE Patents [OSTI]

    Loubriel, G.M.; Baca, A.G.; Zutavern, F.J.

    1998-09-08T23:59:59.000Z

    A high gain, optically triggered, photoconductive semiconductor switch (PCSS) implemented in GaAs as a reverse-biased pin structure with a passivation layer above the intrinsic GaAs substrate in the gap between the two electrodes of the device is disclosed. The reverse-biased configuration in combination with the addition of the passivation layer greatly reduces surface current leakage that has been a problem for prior PCSS devices and enables employment of the much less expensive and more reliable DC charging systems instead of the pulsed charging systems that needed to be used with prior PCSS devices. 5 figs.

  4. GaAs photoconductive semiconductor switch

    DOE Patents [OSTI]

    Loubriel, Guillermo M. (Sandia Park, NM); Baca, Albert G. (Albuquerque, NM); Zutavern, Fred J. (Albuquerque, NM)

    1998-01-01T23:59:59.000Z

    A high gain, optically triggered, photoconductive semiconductor switch (PCSS) implemented in GaAs as a reverse-biased pin structure with a passivation layer above the intrinsic GaAs substrate in the gap between the two electrodes of the device. The reverse-biased configuration in combination with the addition of the passivation layer greatly reduces surface current leakage that has been a problem for prior PCSS devices and enables employment of the much less expensive and more reliable DC charging systems instead of the pulsed charging systems that needed to be used with prior PCSS devices.

  5. Elastomeric organic material for switching application

    SciTech Connect (OSTI)

    Shiju, K., E-mail: shijuvenus@gmail.com, E-mail: pravymon@gmail.com, E-mail: ppredeep@gmail.com; Praveen, T., E-mail: shijuvenus@gmail.com, E-mail: pravymon@gmail.com, E-mail: ppredeep@gmail.com; Preedep, P., E-mail: shijuvenus@gmail.com, E-mail: pravymon@gmail.com, E-mail: ppredeep@gmail.com [Laboratory for Molecular Photonics and Electronics (LAMP), Department of Physics, National Institute of Technology, Calicut, Kerala, 673601 (India)

    2014-10-15T23:59:59.000Z

    Organic Electronic devices like OLED, Organic Solar Cells etc are promising as, cost effective alternatives to their inorganic counterparts due to various reasons. However the organic semiconductors currently available are not attractive with respect to their high cost and intricate synthesis protocols. Here we demonstrate that Natural Rubber has the potential to become a cost effective solution to this. Here an attempt has been made to fabricate iodine doped poly isoprene based switching device. In this work Poly methyl methacrylate is used as dielectric layer and Aluminium are employed as electrodes.

  6. Investigation on properties of ultrafast switching in a bulk gallium arsenide avalanche semiconductor switch

    SciTech Connect (OSTI)

    Hu, Long, E-mail: hulong-1226@126.com [Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049 (China); Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China); Su, Jiancang; Ding, Zhenjie; Hao, Qingsong; Yuan, Xuelin [Science and Technology on High Power Microwave Laboratory, Northwest Institute of Nuclear Technology, Xi'an 710024 (China)

    2014-03-07T23:59:59.000Z

    Properties of ultrafast switching in a bulk gallium arsenide (GaAs) avalanche semiconductor switch based on semi-insulating wafer, triggered by an optical pulse, were analyzed using physics-based numerical simulations. It has been demonstrated that when a voltage with amplitude of 5.2?kV is applied, after an exciting optical pulse with energy of 1??J arrival, the structure with thickness of 650??m reaches a high conductivity state within 110 ps. Carriers are created due to photons absorption, and electrons and holes drift to anode and cathode terminals, respectively. Static ionizing domains appear both at anode and cathode terminals, and create impact-generated carriers which contribute to the formation of electron-hole plasma along entire channel. When the electric field in plasma region increases above the critical value (?4?kV/cm) at which the electrons drift velocity peaks, a domain comes into being. An increase in carrier concentration due to avalanche multiplication in the domains reduces the domain width and results in the formation of an additional domain as soon as the field outside the domains increases above ?4?kV/cm. The formation and evolution of multiple powerfully avalanching domains observed in the simulations are the physical reasons of ultrafast switching. The switch exhibits delayed breakdown with the characteristics affected by biased electric field, current density, and optical pulse energy. The dependence of threshold energy of the exciting optical pulse on the biased electric field is discussed.

  7. Organic solid state optical switches and method for producing organic solid state optical switches

    DOE Patents [OSTI]

    Wasielewski, M.R.; Gaines, G.L.; Niemczyk, M.P.; Johnson, D.G.; Gosztola, D.J.; O`Neil, M.P.

    1993-01-01T23:59:59.000Z

    This invention consists of a light-intensity dependent molecular switch comprised of a compound which shuttles an electron or a plurality of electrons from a plurality of electron donors to an electron acceptor upon being stimulated with light of predetermined wavelengths, and a method for making said compound.

  8. Interactive Visibility Culling in Complex Environments using Occlusion-Switches

    E-Print Network [OSTI]

    North Carolina at Chapel Hill, University of

    Categories and Subject Descriptors: I.3.5 [Com- puter Graphics]: Computational Geometry and Object ModelingInteractive Visibility Culling in Complex Environments using Occlusion-Switches Naga K. Govindaraju culling in complex 3D environments. An occlusion- switch consists of two GPUs (graphics processing units

  9. Valuation of Energy Storage: An Optimal Switching Rene Carmona

    E-Print Network [OSTI]

    Carmona, Rene

    Valuation of Energy Storage: An Optimal Switching Approach Ren´e Carmona Department of Operations://www.pstat.ucsb.edu/faculty/ludkovski We consider the valuation of energy storage facilities within the framework of stochastic control;Carmona and Ludkovski: Optimal Switching for Energy Storage 2 in the commodity financial markets. Storage

  10. Entry, Innovation, and Exit Evidence From LAN Switch Industry

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Entry, Innovation, and Exit Evidence From LAN Switch Industry N° 2007-02 Janvier 2007 Roberto Fontana Lionel Nesta #12;Entry, Innovation, and Exit Evidence From LAN Switch Industry Roberto Fontana of heterogeneous exit, we find that firms with high pre-entry experience and higher technical expertise are more

  11. Bandwidth Efficient All-to-All Broadcast on Switched Clusters

    E-Print Network [OSTI]

    Yuan, Xin

    Bandwidth Efficient All-to-All Broadcast on Switched Clusters Ahmad Faraj Pitch Patarasuk Xin Yuan}@cs.fsu.edu Abstract We develop an all-to-all broadcast scheme that achieves maximum bandwidth efficiency for clusters all- to-all broadcast as efficiently as a single switch connect- ing all machines when the message

  12. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, G.R.

    1983-11-29T23:59:59.000Z

    A dc switching regulated power supply for driving an inductive load is provided. The regulator basic circuit is a bridge arrangement of diodes and transistors. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. A dc power supply is connected to the input of the bridge and the output is connected to the load. A servo controller is provided to control the switching rate of the transistors to maintain a desired current to the load. The regulator may be operated in three stages or modes: (1) for current runup in the load, both first and second transistor switch arrays are turned on and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned off, and load current flywheels through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays off, allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load.

  13. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, George R. (Norris, TN)

    1986-01-01T23:59:59.000Z

    A power supply for driving an inductive load current from a dc power supply hrough a regulator circuit including a bridge arrangement of diodes and switching transistors controlled by a servo controller which regulates switching in response to the load current to maintain a selected load current. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. The regulator may be operated in three "stages" or modes: (1) For current runup in the load, both first and second transistor switch arrays are turned "on" and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned "off", and load current "flywheels" through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays "off", allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load. The three operating states are controlled automatically by the controller.

  14. Task Assignment in a Server Farm with Switching Delays and

    E-Print Network [OSTI]

    Hyytiä, Esa

    Task Assignment in a Server Farm with Switching Delays and General Energy-Aware Cost Structure Esa Servers Customers Basic problem E[T] k parallel queues Tasks arrive at rate (Poisson process) Objective;Switching Delays and Energy Model for Server Farm k parallel servers Size-aware setting Dispatcher Servers

  15. Comparative Study of Switched Reluctance Motors Performances for Two Current

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    of machines as high torque ripple, high acoustic noise and vibration limit their industrial applications [1Comparative Study of Switched Reluctance Motors Performances for Two Current Distributions a 3-phase, 6-slot, and 4-pole Mutually Coupled Switched Reluctance Motor (MCSRM 6/4) with new current

  16. SWITCH MECHANISM DIAGNOSIS USING A PATTERN RECOGNITION APPROACH

    E-Print Network [OSTI]

    Chamroukhi, Faicel

    for the diagnosis of switch mechanisms driven by an electric motor is presented in this paper. Its main advantage (see figure 1) are driven by an electric motor and equiped with a clamp locking system so called VCC ("Verrou Carter Coussinet" in french). Figure 1: Switch mechanism driven by an electrical motor

  17. Power Control for Crossbar-based Input-Queued Switches

    E-Print Network [OSTI]

    , if f is the maximum digital signal frequency, the power consumption of a CMOS device is proportional number of data simultaneously flowing across the switching fabric. Thermal power dissipation is becoming1 Power Control for Crossbar-based Input-Queued Switches Andrea Bianco, Paolo Giaccone, Guido

  18. On the Power of Nonlinear Mappings in Switching Map Systems

    E-Print Network [OSTI]

    Sato, Yuzuru

    On the Power of Nonlinear Mappings in Switching Map Systems Yuzuru Sato 1 # , Makoto Taiji 2 operations would be allowed. It is also expected that the computational power of switching map systems stronger computational power than classical Turing machines. On the other hand, these dynamical systems

  19. Tunnel MOS Heterostructure Field Effect Transistor for RF Switching Applications 

    E-Print Network [OSTI]

    Rezanezhad Gatabi, Iman

    2013-06-06T23:59:59.000Z

    structure called “Tunnel MOS Heterostructure FET (TMOSHFET)” is introduced which has lower ON-state resistance and faster switching speed compared to conventional AlGaN/GaN HEMTs. In the switch ON process, the channel of this device is charged up by electron...

  20. Multistage-Based Switching Fabrics for Scalable Routers

    E-Print Network [OSTI]

    Tzeng, Nian-Feng

    with distributed packet routing to achieve high scalability and low costs. Our fabrics are based on a multistage patterns are evaluated and discussed as well. Being scalable and of low costs, the proposed switching their arrival LCs toward their destined LCs. Switching fabrics naturally affect overall router perfor- mance

  1. Contact OSUR Program | Princeton Plasma Physics Lab

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation and Contact Information ContactContactLee

  2. Contact Us | Photosynthetic Antenna Research Center

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation andInformationContact UsContact Us Contact Us

  3. Contact Us-About-PHaSe-EFRC

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation andInformationContact UsContact UsContact

  4. Contact Us | Y-12 National Security Complex

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws |Contact Us Contact Us Please contact us if

  5. Contact Us | Y-12 National Security Complex

    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,ARMFormsGas SeparationsRelevant toSite MapContact Us Contact UsContact Us

  6. Contact | MIT-Harvard Center for Excitonics

    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,ARMFormsGas SeparationsRelevant toSite MapContact Us ContactContact

  7. Reconfigurable optical switches with monolithic electrical-to-optical interfaces

    SciTech Connect (OSTI)

    Cheng, J.; Zhou, P. [New Mexico Univ., Albuquerque, NM (United States). Center for High Technology Materials; Zolper, J.C.; Lear, K.L.; Vawter, G.A. [Sandia National Labs., Albuquerque, NM (United States); Leibenguth, R.E.; Adams, A.C. [AT and T Bell Labs., Breinigsville, PA (United States)

    1994-03-01T23:59:59.000Z

    Vertical cavity surface-emitting lasers (VCSELs) can be integrated with heterojunction phototransistors (HPTs) and heterojunction bipolar transistors (HBTs) on the same wafer to form high speed optical and optoelectronic switches, respectively, that can be optically or electrically addressed. This permits the direct communication and transmission of data between distributed electronic processors through an optical switching network. The experimental demonstration of an integrated optoelectronic HBT/VCSEL switch combining a GaAs/AlGaAs heterojunction bipolar transistor (HBT) with a VCSEL is described below, using the same epilayer structure upon which binary HPT/VCSEL optical switches are also built. The monolithic HBT/VCSEL switch has high current gain, low power dissipation, and a high optical to electrical conversion efficiency. Its modulation has been measured and modeled.

  8. 2005, in Etudes croles nXXVIII n1,Contacts de croles, croles en contacts, L'Harmattan, 23-57. CONTACTS DE CREOLES A MANA (GUYANE FRANAISE)

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    2005, in Etudes créoles n°XXVIII n°1,Contacts de créoles, créoles en contacts, L'Harmattan, 23°1,Contacts de créoles, créoles en contacts, L'Harmattan, 23-57. 2 de langues, notamment à la gestion

  9. Elastic–Plastic Spherical Contact Modeling Including Roughness Effects

    E-Print Network [OSTI]

    Li, L.; Etsion, I.; Talke, F. E.

    2010-01-01T23:59:59.000Z

    A multilevel model for elastic–plastic contact between ajunction growth of an elastic–plastic spherical contact. J.nite element based elastic–plastic model for the contact of

  10. NUMERICAL MODELING OF CATHODE CONTACT MATERIAL DENSIFICATION

    SciTech Connect (OSTI)

    Koeppel, Brian J.; Liu, Wenning N.; Stephens, Elizabeth V.; Khaleel, Mohammad A.

    2011-11-01T23:59:59.000Z

    Numerical modeling was used to simulate the constrained sintering process of the cathode contact layer during assembly of solid oxide fuel cells (SOFCs). A finite element model based on the continuum theory for sintering of porous bodies was developed and used to investigate candidate low-temperature cathode contact materials. Constitutive parameters for various contact materials under investigation were estimated from dilatometry screening tests, and the influence of processing time, processing temperature, initial grain size, and applied compressive stress on the free sintering response was predicted for selected candidate materials. The densification behavior and generated stresses within a 5-cell planar SOFC stack during sintering, high temperature operation, and room temperature shutdown were predicted. Insufficient constrained densification was observed in the stack at the proposed heat treatment, but beneficial effects of reduced grain size, compressive stack preload, and reduced thermal expansion coefficient on the contact layer densification and stresses were observed.

  11. Contact fatigue : life prediction and palliatives

    E-Print Network [OSTI]

    Conner, Brett P. (Brett Page), 1975-

    2002-01-01T23:59:59.000Z

    Fretting fatigue is defined as damage resulting from small magnitude (0.5-50 microns) displacement between contacting bodies where at least one of the bodies has an applied bulk stress. The applicability and limits of a ...

  12. Cooperativity and Contact Order in Protein Folding

    E-Print Network [OSTI]

    Marek Cieplak

    2004-01-11T23:59:59.000Z

    The effects of cooperativity are studied within Go-Lennard-Jones models of proteins by making the contact interactions dependent on the proximity to the native conformation. The kinetic universality classes are found to remain the same as in the absence of cooperativity. For a fixed native geometry, small changes in the effective contact map may affect the folding times in a chance way and to the extent that is comparable to the shift in the folding times due to cooperativity. The contact order controlls folding scenarios: the average times necessary to bring pairs of amino acids into their near native separations depend on the sequential distances within the pairs. This dependence is largely monotonic, regardless of the cooperativity, and the dominant trend could be described by a single parameter like the average contact order. However, it is the deviations from the trend which are usually found to set the net folding times.

  13. Clean Cities Program Contacts (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2013-12-01T23:59:59.000Z

    Contact information for the U.S. Department of Energy's Clean Cities program staff and for the coordinators of the nearly 100 local Clean Cities coalitions across the country.

  14. Front contact solar cell with formed emitter

    DOE Patents [OSTI]

    Cousins, Peter John

    2014-11-04T23:59:59.000Z

    A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

  15. Front contact solar cell with formed emitter

    DOE Patents [OSTI]

    Cousins, Peter John (Menlo Park, CA)

    2012-07-17T23:59:59.000Z

    A bipolar solar cell includes a backside junction formed by an N-type silicon substrate and a P-type polysilicon emitter formed on the backside of the solar cell. An antireflection layer may be formed on a textured front surface of the silicon substrate. A negative polarity metal contact on the front side of the solar cell makes an electrical connection to the substrate, while a positive polarity metal contact on the backside of the solar cell makes an electrical connection to the polysilicon emitter. An external electrical circuit may be connected to the negative and positive metal contacts to be powered by the solar cell. The positive polarity metal contact may form an infrared reflecting layer with an underlying dielectric layer for increased solar radiation collection.

  16. Contact Information College of Business and Economics

    E-Print Network [OSTI]

    Barrash, Warren

    Contact Information College of Business and Economics Center for Business Research and Economic Research and Economic Development Center What's your challenge? We help businesses and organizations can lie in Accountancy, Economics, Information Technology and Supply Chain Management, International

  17. Semiconductor switch geometry with electric field shaping

    DOE Patents [OSTI]

    Booth, Rex (Livermore, CA); Pocha, Michael D. (Livermore, CA)

    1994-01-01T23:59:59.000Z

    An optoelectric switch is disclosed that utilizes a cylindrically shaped and contoured GaAs medium or other optically active semiconductor medium to couple two cylindrically shaped metal conductors with flat and flared termination points each having an ovoid prominence centrally extending there from. Coupling the truncated ovoid prominence of each conductor with the cylindrically shaped optically active semiconductor causes the semiconductor to cylindrically taper to a triple junction circular line at the base of each prominence where the metal conductor conjoins with the semiconductor and a third medium such as epoxy or air. Tapering the semiconductor at the triple junction inhibits carrier formation and injection at the triple junction and thereby enables greater current carrying capacity through and greater sensitivity of the bulk area of the optically active medium.

  18. Semiconductor switch geometry with electric field shaping

    DOE Patents [OSTI]

    Booth, R.; Pocha, M.D.

    1994-08-23T23:59:59.000Z

    An optoelectric switch is disclosed that utilizes a cylindrically shaped and contoured GaAs medium or other optically active semiconductor medium to couple two cylindrically shaped metal conductors with flat and flared termination points each having an ovoid prominence centrally extending there from. Coupling the truncated ovoid prominence of each conductor with the cylindrically shaped optically active semiconductor causes the semiconductor to cylindrically taper to a triple junction circular line at the base of each prominence where the metal conductor conjoins with the semiconductor and a third medium such as epoxy or air. Tapering the semiconductor at the triple junction inhibits carrier formation and injection at the triple junction and thereby enables greater current carrying capacity through and greater sensitivity of the bulk area of the optically active medium. 10 figs.

  19. Permanent-magnet switched-flux machine

    DOE Patents [OSTI]

    Trzynadlowski, Andrzej M.; Qin, Ling

    2010-01-12T23:59:59.000Z

    A permanent-magnet switched-flux (PMSF) device has a ferromagnetic outer stator mounted to a shaft about a central axis extending axially through the PMSF device. Pluralities of top and bottom stator poles are respectively mounted in first and second circles, radially outwardly in first and second transverse planes extending from first and second sections of the central axis adjacent to an inner surface of the ferromagnetic outer stator. A ferromagnetic inner rotor is coupled to the shaft and has i) a rotor core having a core axis co-axial with the central axis; and ii) first and second discs having respective outer edges with first and second pluralities of permanent magnets (PMs) mounted in first and second circles, radially outwardly from the rotor core axis in the first and second transverse planes. The first and second pluralities of PMs each include PMs of alternating polarity.

  20. Eddy-current-damped microelectromechanical switch

    DOE Patents [OSTI]

    Christenson, Todd R. (Albuquerque, NM); Polosky, Marc A. (Tijeras, NM)

    2009-12-15T23:59:59.000Z

    A microelectromechanical (MEM) device is disclosed that includes a shuttle suspended for movement above a substrate. A plurality of permanent magnets in the shuttle of the MEM device interact with a metal plate which forms the substrate or a metal portion thereof to provide an eddy-current damping of the shuttle, thereby making the shuttle responsive to changes in acceleration or velocity of the MEM device. Alternately, the permanent magnets can be located in the substrate, and the metal portion can form the shuttle. An electrical switch closure in the MEM device can occur in response to a predetermined acceleration-time event. The MEM device, which can be fabricated either by micromachining or LIGA, can be used for sensing an acceleration or deceleration event (e.g. in automotive applications such as airbag deployment or seat belt retraction).

  1. Eddy-current-damped microelectromechanical switch

    DOE Patents [OSTI]

    Christenson, Todd R. (Albuquerque, NM); Polosky, Marc A. (Tijeras, NM)

    2007-10-30T23:59:59.000Z

    A microelectromechanical (MEM) device is disclosed that includes a shuttle suspended for movement above a substrate. A plurality of permanent magnets in the shuttle of the MEM device interact with a metal plate which forms the substrate or a metal portion thereof to provide an eddy-current damping of the shuttle, thereby making the shuttle responsive to changes in acceleration or velocity of the MEM device. Alternately, the permanent magnets can be located in the substrate, and the metal portion can form the shuttle. An electrical switch closure in the MEM device can occur in response to a predetermined acceleration-time event. The MEM device, which can be fabricated either by micromachining or LIGA, can be used for sensing an acceleration or deceleration event (e.g. in automotive applications such as airbag deployment or seat belt retraction).

  2. High voltage photo switch package module

    DOE Patents [OSTI]

    Sullivan, James S; Sanders, David M; Hawkins, Steven A; Sampayan, Stephen E

    2014-02-18T23:59:59.000Z

    A photo-conductive switch package module having a photo-conductive substrate or wafer with opposing electrode-interface surfaces, and at least one light-input surface. First metallic layers are formed on the electrode-interface surfaces, and one or more optical waveguides having input and output ends are bonded to the substrate so that the output end of each waveguide is bonded to a corresponding one of the light-input surfaces of the photo-conductive substrate. This forms a waveguide-substrate interface for coupling light into the photo-conductive wafer. A dielectric material such as epoxy is then used to encapsulate the photo-conductive substrate and optical waveguide so that only the metallic layers and the input end of the optical waveguide are exposed. Second metallic layers are then formed on the first metallic layers so that the waveguide-substrate interface is positioned under the second metallic layers.

  3. A New Optical Switching Fabric Architecture Incorporating Rapidly Switching All-Optical Variable Delay Buffers

    E-Print Network [OSTI]

    Kolner, Brian H.

    - optical random access memory. While the theoretical and experimental work for the optical-label switching of the output delay buffer. Electronic On-Off Logic 2^(N-1)T 2^(N-2)T T Electronic On-Off Logic 2^(N-1)T 2^(N-2)T T ? i Electronic On-Off Logic 2^(N-1)T 2^(N-2)T T Electronic On-Off Logic 2^(N-1)T 2^(N-2)T T ? i

  4. Formation of contact in massive close binaries

    E-Print Network [OSTI]

    S. Wellstein; N. Langer; H. Braun

    2001-02-14T23:59:59.000Z

    We present evolutionary calculations for 74 close binaries systems with initial primary masses in the range 12...25 M_sun, and initial secondary masses between 6 and 24 M_sun. The initial periods were chosen such that mass overflow starts during the core hydrogen burning phase of the primary (Case A), or shortly thereafter (Case B). We assume conservative evolution for contact-free systems, i.e., no mass or angular momentum loss from those system except due to stellar winds. We investigate the borderline between contact-free evolution and contact, as a function of the initial system parameters. We also investigate the effect of the treatment of convection, and found it relevant for contact and supernova order in Case A systems, particularly for the highest considered masses. For Case B systems we find contact for initial periods above approximate 10 days and below. However, in that case (and for not too large periods) contact occurs only after the mass ratio has been reversed, due to the increased fraction of the donor's convective envelope. As most In all Cases we find contact for mass ratios below approximate 0.65. We derive the observable properties of our systems after the major mass transfer event, where the mass gainer is a main sequence or supergiant O or early B type star, and the mass loser is a helium star. We point out that the assumption of conservative evolution for contact-free systems could be tested by finding helium star companions to O stars.

  5. Dialect Contact, Convergence, and Maintenance in Oregon Athabaskan

    E-Print Network [OSTI]

    Spence, Justin

    2013-01-01T23:59:59.000Z

    Contact, Convergence, and Maintenance in Oregon AthabaskanContact, Convergence, and Maintenance in Oregon Athabaskan Jcases of dialect maintenance presented in §5 show that not

  6. Dynamical switching characteristics of a bistable injection laser

    SciTech Connect (OSTI)

    Lau, K.Y.; Harder, C.; Yariv, A.

    1982-02-01T23:59:59.000Z

    The switching characteristics of a bistable injection laser with very large hysteresis is examined. Switch-on delays are shown to exhibit a ''critical'' part and a ''noncritical'' part, both of which can be reduced by increasing the overdrive current. It is possible to obtain fairly fast switching time (<20 ns) with a strong overdrive. Nominal delays of 100--200 ns result under moderate overdrives. These long time scales are due to long carrier lifetimes in the carrier-depleted absorption section, a property intrinsic to these bistable injection lasers.

  7. Spintronic switches for ultra low energy global interconnects

    SciTech Connect (OSTI)

    Sharad, Mrigank, E-mail: msharad@purdue.edu; Roy, Kaushik [School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907 (United States)

    2014-05-07T23:59:59.000Z

    We present ultra-low energy interconnect design using nano-scale spin-torque (ST) switches for global data-links. Emerging spin-torque phenomena can lead to ultra-low-voltage, high-speed current-mode magnetic-switches. ST-switches can simultaneously provide large trans-impedance gain by employing magnetic tunnel junctions, to convert current-mode signals into large-swing voltage levels. Such device-characteristics can be used in the design of energy-efficient current-mode global interconnects.

  8. Photo-induced micro-mechanical optical switch

    DOE Patents [OSTI]

    Rajic, Slobodan (Knoxville, TN); Datskos, Panagiotis George (Knoxville, TN); Egert, Charles M. (late of Oak Ridge, TN)

    2002-01-01T23:59:59.000Z

    An optical switch is formed by introducing light lengthwise to a microcantilever waveguide directed toward a second waveguide. The microcantilever is caused to bend by light emitted from a laser diode orthogonal to the microcantilever and at an energy above the band gap, which induces stress as a result of the generation of free carriers. The bending of the waveguide directs the carrier frequency light to a second receptor waveguide or to a non-responsive surface. The switch may be combined in an array to perform multiple switching functions rapidly and at low energy losses.

  9. JOURNAL OF MICROELECTROMECHANICAL SYSTEMS, VOL. 17, NO. 6, DECEMBER 2008 1439 Schottky Barrier Contact-Based RF MEMS Switch

    E-Print Network [OSTI]

    Lee, Jeong-Bong

    is with Raytheon Company, Dallas, TX 75243 USA, and also with The University of Texas at Dallas, Richardson, TX 75080 USA (e-mail: b-pillans@raytheon.com). F. Morris and G. Frazier are with Raytheon Company, Dallas, TX 75243 USA. P. Chahal was with Raytheon Company, Dallas, TX 75243 USA. He is now with Abbott

  10. On the Combined Input-Crosspoint Buffered Switch with Round-Robin Arbitration

    E-Print Network [OSTI]

    Rojas-Cessa, Roberto

    through. Therefore, the search for switch/router architectures with high performance and large capacity) Segmentation of incoming variable-size packets at the ingress side of a switch to perform internal switching, the performance of packet switches are con- strained by memory speed and the efficiency of the arbitration scheme

  11. Send an instant message 1 In your Contacts list, double-click a contact.

    E-Print Network [OSTI]

    Paulsson, Johan

    Send an instant message 1 In your Contacts list, double-click a contact. 2 Type a message in the message input area at the bottom of the message box, and then press Enter. 3 (Optional) To add an emoticon the letter A next to the emoticon button. Receive an instant message When someone sends you

  12. SHR Service Team: Academic Divisions -Contact Matrix Primary Contact by Unit/Division

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    SHR Service Team: Academic Divisions - Contact Matrix Primary Contact by Unit/Division Astronomy Consultation Dawn Harker Teresa Roffe Barbara Lorimer Last Revised: 07/07/2010 Mail Stop: SHR-Service Teams Fax: 831-459-2661 1 of 2 #12;SHR Operations Services Team One SHR Partner Services Senior Manager, SHR

  13. Throughput-cost analysis of optical flow switching

    E-Print Network [OSTI]

    Chan, Vincent W. S.

    In this paper, we employ a cost model embodying major sources of capital expenditure (CapEx) to compare the throughput-cost tradeoff offered by optical flow switching to that of more traditional optical network architectures.

  14. Reducing Actuator Switchings for Motion Control of Autonomous Underwater Vehicles

    E-Print Network [OSTI]

    Smith, Ryan N.

    Reducing Actuator Switchings for Motion Control of Autonomous Underwater Vehicles Monique Chyba, such as time, energy, payload or some combination of these. Indeed, the major issue is that due to the vehicles

  15. Using Multiprotocol Label Switching in Virtual Private Networks

    E-Print Network [OSTI]

    Doddapaneni, Krishnamohan

    2001-01-01T23:59:59.000Z

    This thesis presents the design of Multiprotocol Label Switching Virtual Private Networks(MPLS VPN). MPLS VPNs are true peer models, which perform traffic separation at Layer 3, through the implementation of separate IP VPN forwarding tables. MPLS...

  16. ab switched current: Topics by E-print Network

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

    interfaces with the ac grid using a pulsewidth-modulation (PWM) inverter. In 3, a variable-speed wind turbine for a Switched Reluctance Wind Generator, Based on Current...

  17. atrial switch operation: Topics by E-print Network

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

    interfaces with the ac grid using a pulsewidth-modulation (PWM) inverter. In 3, a variable-speed wind turbine for a Switched Reluctance Wind Generator, Based on Current...

  18. arterial switch operation: Topics by E-print Network

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

    interfaces with the ac grid using a pulsewidth-modulation (PWM) inverter. In 3, a variable-speed wind turbine for a Switched Reluctance Wind Generator, Based on Current...

  19. Data Parallel SwitchLevel Simulation \\Lambda Randal E. Bryant

    E-Print Network [OSTI]

    Bryant, Randal E.

    Data Parallel Switch­Level Simulation \\Lambda Randal E. Bryant Computer Science Department Carnegie the bit­level paral­ lelism inherent in conventional machine operations. Bryant---Data Parallel Simulation

  20. Oxygen enhanced switching to combustion of lower rank fuels ...

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

    enhanced switching to combustion of lower rank fuels Re-direct Destination: A furnace that combusts fuel, such as coal, of a given minimum energy content to obtain a stated minimum...

  1. Bayesian Nonparametric Methods for Learning Markov Switching Processes

    E-Print Network [OSTI]

    Fox, Emily Beth

    In this article, we explored a Bayesian nonparametric approach to learning Markov switching processes. This framework requires one to make fewer assumptions about the underlying dynamics, and thereby allows the data to ...

  2. Development and application of an advanced switched reluctance generator drive

    E-Print Network [OSTI]

    Asadi, Peyman

    2009-05-15T23:59:59.000Z

    This dissertation contains the results of research conducted on the design and control characterization of a Switched Reluctance Generator (SRG) for maximum output power. The SRG is an attractive solution to the increasing worldwide demand...

  3. Coordinated Variable Structure Switching Attacks for Smart Grid

    E-Print Network [OSTI]

    Liu, Shan

    2013-02-11T23:59:59.000Z

    or more relays and circuit breakers of a power system to disrupt operation. Existence of this switching vulnerability is dependent on the local structure of the power grid. Variable structure systems theory is employed to effectively model the cyber...

  4. AlGaN/GaN-based power semiconductor switches

    E-Print Network [OSTI]

    Lu, Bin, Ph. D. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    AlGaN/GaN-based high-electron-mobility transistors (HEMTs) have great potential for their use as high efficiency and high speed power semiconductor switches, thanks to their high breakdown electric field, mobility and ...

  5. Scheduling in switched queueing networks with heavy-tailed trac

    E-Print Network [OSTI]

    Markakis, Mihalis G

    2013-01-01T23:59:59.000Z

    We study scheduling problems arising in switched queueing networks, a class of stochastic systems that are often used to model data communication networks, such as uplinks and downlinks of cellular networks, networks of ...

  6. Integrated optical switching using titanium nitride micro electromechanical systems

    E-Print Network [OSTI]

    Takahashi, Satoshi, Ph. D. Massachusetts Institute of Technology

    2006-01-01T23:59:59.000Z

    This thesis reports an integrated optical wavelength specific switching device for applications in optical integrated circuits (OICs) based on micro electromechanical systems (MEMS). The device consists of a ring resonator ...

  7. Plasmon-induced photonic switching in a metamaterial

    E-Print Network [OSTI]

    H. Xu; B. S. Ham

    2009-05-22T23:59:59.000Z

    Using light-induced localized surface plasmon interactions in a metamaterial, we present a plasmonic control of light absorption for photonic switching. We discuss that the present surface plasmon-induced photonic switching is comparable with coherence swapping in a tripod optical system based on electromagnetically induced transparency. This outcome opens a door to active controls of the surface plasmons in a metamaterial for potential applications of nano photonics.

  8. All-optical switching in optically induced nonlinear waveguide couplers

    SciTech Connect (OSTI)

    Diebel, Falko, E-mail: falko.diebel@uni-muenster.de; Boguslawski, Martin; Rose, Patrick; Denz, Cornelia [Institut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität Münster, 48149 Münster (Germany); Leykam, Daniel; Desyatnikov, Anton S. [Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200 (Australia)

    2014-06-30T23:59:59.000Z

    We experimentally demonstrate all-optical vortex switching in nonlinear coupled waveguide arrays optically induced in photorefractive media. Our technique is based on multiplexing of nondiffracting Bessel beams to induce various types of waveguide configurations. Using double- and quadruple-well potentials, we demonstrate precise control over the coupling strength between waveguides, the linear and nonlinear dynamics and symmetry-breaking bifurcations of guided light, and a power-controlled optical vortex switch.

  9. RF-MEMS Switched Varactors for Medium Power Applications

    E-Print Network [OSTI]

    Maury, F; Crunteanu, A; Conseil, F; Blondy, P

    2008-01-01T23:59:59.000Z

    In RF (Radio Frequency) domain, one of the limitations of using MEMS (Micro Electromechanical Systems) switching devices for medium power applications is RF power. Failure phenomena appear even for 500 mW. A design of MEMS switched capacitors with an enhanced topology is presented in this paper to prevent it. This kind of device and its promising performances will serve to fabricate a MEMS based phase shifter able to work under several watts.

  10. Design of switched-resistor monolithic filters using NMOS technology

    E-Print Network [OSTI]

    Ngo, Dinh Tai

    1981-01-01T23:59:59.000Z

    DESIGN OF SWITCHED-RESISTOR MONOLITHIC FILTERS USING NMOS TECHNOLOGY A Thesis by DINH TAI NGO Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December... 1981 Major Subject: Electrical Engineering DESIGN OF SWITCHED-RESISTOR MONOLITHIC FILTERS USING NMOS TECHNOLOGY A Thesis by DINH TAI NGO Approved as to style and content by J+ (' ll ( (C airman of Comm'it tee) (Member) (Member) ( d of De...

  11. Electronically commutated serial-parallel switching for motor windings

    DOE Patents [OSTI]

    Hsu, John S. (Oak Ridge, TN)

    2012-03-27T23:59:59.000Z

    A method and a circuit for controlling an ac machine comprises controlling a full bridge network of commutation switches which are connected between a multiphase voltage source and the phase windings to switch the phase windings between a parallel connection and a series connection while providing commutation discharge paths for electrical current resulting from inductance in the phase windings. This provides extra torque for starting a vehicle from lower battery current.

  12. Current rectification, switching, polarons, and defects in molecular electronic devices

    E-Print Network [OSTI]

    A. M. Bratkovsky

    2006-11-06T23:59:59.000Z

    Devices for nano- and molecular size electronics are currently a focus of research aimed at an efficient current rectification and switching. A few generic molecular scale devices are reviewed here on the basis of first-principles and model approaches. Current rectification by (ballistic) molecular quantum dots can produce the rectification ratio ~100. Current switching due to conformational changes in the molecules is slow, on the order of a few kHz. Fast switching (~1THz) may be achieved, at least in principle, in a degenerate molecular quantum dot with strong coupling of electrons with vibrational excitations. We show that the mean-field approach fails to properly describe intrinsic molecular switching and present an exact solution to the problem. Defects in molecular films result in spurious peaks in conductance, apparent negative differential resistance, and may also lead to unusual temperature and bias dependence of current. The observed switching in many cases is_extrinsic_, caused by changes in molecule-electrode geometry, molecule reconfiguration, metallic filament formation through, and/or changing amount of disorder in a molecular film. We give experimental examples of telegraph "switching" and "hot spot" formation in the molecular films.

  13. Contact Us | National Nuclear Security Administration

    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 3,625govInstrumentstdmadapInactiveVisiting theCommercializationValidation andInformationContact Us Contact

  14. DOE Research and Development Accomplishments Contact Us

    Office of Scientific and Technical Information (OSTI)

    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 742EnergyOn AprilAElectronic Input Options Garyand TechnicalAboutContact Us ContactBlog

  15. Contact Us | Linac Coherent Light Source

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws | NationalContactAboutContact Us

  16. Contacts | Y-12 National Security Complex

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws |Contact UsContacts for MicroBooNEContacts

  17. Contact CEFRC - Combustion Energy Frontier Research Center

    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,ARMFormsGas SeparationsRelevant toSite Map Homehome / ContactContact CEFRC

  18. Contact Hanford Fire Department - Hanford Site

    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,ARMFormsGas SeparationsRelevant toSite Map Homehome / ContactContact

  19. Contact Us | Argonne Leadership Computing Facility

    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,ARMFormsGas SeparationsRelevant toSite Map HomehomeContactContact Us

  20. Contact Us | Center for Energy Efficient Materials

    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,ARMFormsGas SeparationsRelevant toSite Map HomehomeContactContact

  1. Contact Us | National Nuclear Security Administration

    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,ARMFormsGas SeparationsRelevant toSite MapContact Us Contact Us NNSA The

  2. Contact Us | Stanford Synchrotron Radiation Lightsource

    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,ARMFormsGas SeparationsRelevant toSite MapContact Us Contact Us

  3. Contact us | Energy Frontier Research Centers

    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,ARMFormsGas SeparationsRelevant toSite MapContact Us Contact

  4. Efficient Switches for Solar Power Conversion: Four Quadrant GaN Switch Enabled Three Phase Grid-Tied Microinverters

    SciTech Connect (OSTI)

    None

    2012-02-13T23:59:59.000Z

    Solar ADEPT Project: Transphorm is developing power switches for new types of inverters that improve the efficiency and reliability of converting energy from solar panels into useable electricity for the grid. Transistors act as fast switches and control the electrical energy that flows in an electrical circuit. Turning a transistor off opens the circuit and stops the flow of electrical current; turning it on closes the circuit and allows electrical current to flow. In this way a transistor can be used to convert DC from a solar panel into AC for use in a home. Transphorm’s transistors will enable a single semiconductor device to switch electrical currents at high-voltage in both directions—making the inverter more compact and reliable. Transphorm is using Gallium Nitride (GaN) as a semiconductor material in its transistors instead of silicon, which is used in most conventional transistors, because GaN transistors have lower losses at higher voltages and switching frequencies.

  5. In-situ observation of self-regulated switching behavior in WO{sub 3-x} based resistive switching devices

    SciTech Connect (OSTI)

    Hong, D. S.; Wang, W. X.; Chen, Y. S., E-mail: yschen@aphy.iphy.ac.cn; Sun, J. R.; Shen, B. G. [Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academic of Sciences, Beijing 100190 (China)

    2014-09-15T23:59:59.000Z

    The transmittance of tungsten oxides can be adjusted by oxygen vacancy (V{sub o}) concentration due to its electrochromic property. Here, we report an in-situ observation of resistive switching phenomenon in the oxygen-deficient WO{sub 3-x} planar devices. Besides directly identifying the formation/rupture of dark-colored conductive filaments in oxide layer, the stripe-like WO{sub 3-x} device demonstrated self-regulated switching behavior during the endurance testing, resulting in highly consistent switching parameters after a stabilizing process. For very high V{sub o}s mobility was demonstrated in the WO{sub 3-x} film by the pulse experiment, we suggested that the electric-field-induced homogeneous migration of V{sub o}s was the physical origin for such unique switching characteristics.

  6. For additional information, contact: Department of Physics

    E-Print Network [OSTI]

    Lawrence, Rick L.

    For additional information, contact: Department of Physics Montana State University 264 EPS Building P.O. Box 173840 Bozeman, MT 59717-3840 Tel: 406-994-3614 Fax: 406-994-4452 www.physics.montana.edu physics@montana.edu As a physics major at Montana State University, you will study some of the most

  7. subcollector Schottky collector contact & interconnect metals

    E-Print Network [OSTI]

    Rodwell, Mark J. W.

    base collector depletion layer subcollector ohmic metal (a) base collector depletion layer Schottky metal base emitter collector collector We emitter base emitter emitter We Wc Wc (b) Schottky collector contact & interconnect metals Emitter & collector Ohmics undoped collector depletion layer base N

  8. Contacts Integration into functional nanoscale devices

    E-Print Network [OSTI]

    Metlushko, Vitali

    from the very beginning of the design process. While the properties of nano-scale magnetic devices by magnetoresistive random- access memory (MRAM). The design challenges faced by CMOS and MRAM are very similar of this, the topographical influence of contacts on the overlying magnetic device must be taken account

  9. Contact details: School of Architecture, BCU

    E-Print Network [OSTI]

    Birmingham, University of

    With 90% of the UK population living in urban areas, improving urban sustainability has become a pressing Economic Fabric This work package investigated opportunities and barriers to achieving sustainable is to be sustainable in the widest sense. Contact details: Centre for Urban and Regional Studies, U0B Dr. Austin Barber

  10. Lead Sorption onto Ferrihydrite. 3. Multistage Contacting

    E-Print Network [OSTI]

    Sparks, Donald L.

    , such as arsenic (As) and selenium (Se), from coal-fired power plant wastewater streams via coprecipitation L . S P A R K S Department of Plant and Soil Sciences, University of Delaware, Newark, Delaware for multiple contacting stages is reduced capital investment and operating costs for sludge handling

  11. Thermodynamics of nuclei in thermal contact

    E-Print Network [OSTI]

    Karl-Heinz Schmidt; Beatriz Jurado

    2010-10-05T23:59:59.000Z

    The behaviour of a di-nuclear system in the regime of strong pairing correlations is studied with the methods of statistical mechanics. It is shown that the thermal averaging is strong enough to assure the application of thermodynamical methods to the energy exchange between the two nuclei in contact. In particular, thermal averaging justifies the definition of a nuclear temperature.

  12. Contact Details Journeying Beyond Breast Cancer

    E-Print Network [OSTI]

    Espinosa, Horacio D.

    Home About Contact Details Facebook Search Journeying Beyond Breast Cancer making sense of the cancer experience Feeds: Posts Comments Cancer-fighting fountain pen May 20, 2009 by JBBC A research team be used both as a research tool in the development of next-generation cancer treatments

  13. For additional information, contact: Department of Ecology

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    For additional information, contact: Department of Ecology Montana State University 310 Lewis Hall P.O. Box 173460 Bozeman, MT 59717-3460 Tel: 406-994-4548 Fax: 406-994-3190 www.montana.edu/ecology/ ecology@montana.edu The Department of Ecology at Montana State University offers undergraduate majors

  14. Thin Silicon MEMS Contact-Stress Sensor

    SciTech Connect (OSTI)

    Kotovsky, J; Tooker, A; Horsley, D A

    2009-12-07T23:59:59.000Z

    This work offers the first, thin, MEMS contact-stress (CS) sensor capable of accurate in situ measruement of time-varying, contact-stress between two solid interfaces (e.g. in vivo cartilage contact-stress and body armor dynamic loading). This CS sensor is a silicon-based device with a load sensitive diaphragm. The diaphragm is doped to create piezoresistors arranged in a full Wheatstone bridge. The sensor is similar in performance to established silicon pressure sensors, but it is reliably produced to a thickness of 65 {micro}m. Unlike commercial devices or other research efforts, this CS sensor, including packaging, is extremely thin (< 150 {micro}m fully packaged) so that it can be unobtrusively placed between contacting structures. It is built from elastic, well-characterized materials, providing accurate and high-speed (50+ kHz) measurements over a potential embedded lifetime of decades. This work explored sensor designs for an interface load range of 0-2 MPa; however, the CS sensor has a flexible design architecture to measure a wide variety of interface load ranges.

  15. Contact Anosov flows and the FBI transform

    E-Print Network [OSTI]

    Tsujii, Masato

    2010-01-01T23:59:59.000Z

    This paper is about spectral properties of transfer operators for contact Anosov flows. The main result gives the essential spectral radius of the transfer operators acting on the so-called anisotropic Sobolev space exactly in terms of dynamical exponents. Also we provide a simplified proof by using the FBI transform.

  16. Contact Angle Hysteresis on Superhydrophobic Stripes

    E-Print Network [OSTI]

    Alexander L. Dubov; Ahmed Mourran; Martin Möller; Olga I. Vinogradova

    2014-07-21T23:59:59.000Z

    We study experimentally and discuss quantitatively the contact angle hysteresis on striped superhydrophobic surfaces as a function of a solid fraction, $\\phi_S$. It is shown that the receding regime is determined by a longitudinal sliding motion the deformed contact line. Despite an anisotropy of the texture the receding contact angle remains isotropic, i.e. is practically the same in the longitudinal and transverse directions. The cosine of the receding angle grows nonlinearly with $\\phi_S$, in contrast to predictions of the Cassie equation. To interpret this we develop a simple theoretical model, which shows that the value of the receding angle depends both on weak defects at smooth solid areas and on the elastic energy of strong defects at the borders of stripes, which scales as $\\phi_S^2 \\ln \\phi_S$. The advancing contact angle was found to be anisotropic, except as in a dilute regime, and its value is determined by the rolling motion of the drop. The cosine of the longitudinal advancing angle depends linearly on $\\phi_S$, but a satisfactory fit to the data can only be provided if we generalize the Cassie equation to account for weak defects. The cosine of the transverse advancing angle is much smaller and is maximized at $\\phi_S\\simeq 0.5$. An explanation of its value can be obtained if we invoke an additional energy due to strong defects in this direction, which is shown to be proportional to $\\phi_S^2$. Finally, the contact angle hysteresis is found to be quite large and generally anisotropic, but it becomes isotropic when $\\phi_S\\leq 0.2$.

  17. Ferroelectric opening switches for large-scale pulsed power drivers.

    SciTech Connect (OSTI)

    Brennecka, Geoffrey L.; Rudys, Joseph Matthew; Reed, Kim Warren; Pena, Gary Edward; Tuttle, Bruce Andrew; Glover, Steven Frank

    2009-11-01T23:59:59.000Z

    Fast electrical energy storage or Voltage-Driven Technology (VDT) has dominated fast, high-voltage pulsed power systems for the past six decades. Fast magnetic energy storage or Current-Driven Technology (CDT) is characterized by 10,000 X higher energy density than VDT and has a great number of other substantial advantages, but it has all but been neglected for all of these decades. The uniform explanation for neglect of CDT technology is invariably that the industry has never been able to make an effective opening switch, which is essential for the use of CDT. Most approaches to opening switches have involved plasma of one sort or another. On a large scale, gaseous plasmas have been used as a conductor to bridge the switch electrodes that provides an opening function when the current wave front propagates through to the output end of the plasma and fully magnetizes the plasma - this is called a Plasma Opening Switch (POS). Opening can be triggered in a POS using a magnetic field to push the plasma out of the A-K gap - this is called a Magnetically Controlled Plasma Opening Switch (MCPOS). On a small scale, depletion of electron plasmas in semiconductor devices is used to affect opening switch behavior, but these devices are relatively low voltage and low current compared to the hundreds of kilo-volts and tens of kilo-amperes of interest to pulsed power. This work is an investigation into an entirely new approach to opening switch technology that utilizes new materials in new ways. The new materials are Ferroelectrics and using them as an opening switch is a stark contrast to their traditional applications in optics and transducer applications. Emphasis is on use of high performance ferroelectrics with the objective of developing an opening switch that would be suitable for large scale pulsed power applications. Over the course of exploring this new ground, we have discovered new behaviors and properties of these materials that were here to fore unknown. Some of these unexpected discoveries have lead to new research directions to address challenges.

  18. Resistive switching and conductance quantization in Ag/SiO{sub 2}/indium tin oxide resistive memories

    SciTech Connect (OSTI)

    Gao, S.; Chen, C.; Liu, H. Y.; Lin, Y. S.; Li, S. Z.; Lu, S. H.; Wang, G. Y.; Song, C.; Zeng, F., E-mail: zengfei@mail.tsinghua.edu.cn; Pan, F., E-mail: panf@mail.tsinghua.edu.cn [Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China); Zhai, Z. [Department of Metallurgical Engineering, College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024 (China)

    2014-08-11T23:59:59.000Z

    The Ag/SiO{sub 2}/indium tin oxide (ITO) devices exhibit bipolar resistive switching with a large memory window of ?10{sup 2}, satisfactory endurance of >500 cycles, good retention property of >2000?s, and fast operation speed of <100?ns, thus being a type of promising resistive memory. Under slow voltage sweep measurements, conductance plateaus with a conductance value of integer or half-integer multiples of single atomic point contact have been observed, which agree well with the physical phenomenon of conductance quantization. More importantly, the Ag/SiO{sub 2}/ITO devices exhibit more distinct quantized conductance plateaus under pulse measurements, thereby showing the potential for realizing ultra-high storage density.

  19. Active alignment/contact verification system

    DOE Patents [OSTI]

    Greenbaum, William M. (Modesto, CA)

    2000-01-01T23:59:59.000Z

    A system involving an active (i.e. electrical) technique for the verification of: 1) close tolerance mechanical alignment between two component, and 2) electrical contact between mating through an elastomeric interface. For example, the two components may be an alumina carrier and a printed circuit board, two mating parts that are extremely small, high density parts and require alignment within a fraction of a mil, as well as a specified interface point of engagement between the parts. The system comprises pairs of conductive structures defined in the surfaces layers of the alumina carrier and the printed circuit board, for example. The first pair of conductive structures relate to item (1) above and permit alignment verification between mating parts. The second pair of conductive structures relate to item (2) above and permit verification of electrical contact between mating parts.

  20. Electrical contact arrangement for a coating process

    DOE Patents [OSTI]

    Kabagambe, Benjamin; McCamy, James W; Boyd, Donald W

    2013-09-17T23:59:59.000Z

    A protective coating is applied to the electrically conductive surface of a reflective coating of a solar mirror by biasing a conductive member having a layer of a malleable electrically conductive material, e.g. a paste, against a portion of the conductive surface while moving an electrodepositable coating composition over the conductive surface. The moving of the electrodepositable coating composition over the conductive surface includes moving the solar mirror through a flow curtain of the electrodepositable coating composition and submerging the solar mirror in a pool of the electrodepositable coating composition. The use of the layer of a malleable electrically conductive material between the conductive member and the conductive surface compensates for irregularities in the conductive surface being contacted during the coating process thereby reducing the current density at the electrical contact area.

  1. Direct contact, binary fluid geothermal boiler

    DOE Patents [OSTI]

    Rapier, Pascal M. (Richmond, CA)

    1982-01-01T23:59:59.000Z

    Energy is extracted from geothermal brines by direct contact with a working fluid such as isobutane which is immiscible with the brine in a geothermal boiler. The geothermal boiler provides a distributor arrangement which efficiently contacts geothermal brine with the isobutane in order to prevent the entrainment of geothermal brine in the isobutane vapor which is directed to a turbine. Accordingly the problem of brine carry-over through the turbine causes corrosion and scaling thereof is eliminated. Additionally the heat exchanger includes straightening vanes for preventing startup and other temporary fluctuations in the transitional zone of the boiler from causing brine carryover into the turbine. Also a screen is provided in the heat exchanger to coalesce the working fluid and to assist in defining the location of the transitional zone where the geothermal brine and the isobutane are initially mixed.

  2. Modelling receding contact lines on superhydrophobic surfaces

    E-Print Network [OSTI]

    B. M. Mognetti; J. M. Yeomans

    2010-10-23T23:59:59.000Z

    We use mesoscale simulations to study the depinning of a receding contact line on a superhydrophobic surface patterned by a regular array of posts. In order that the simulations are feasible, we introduce a novel geometry where a column of liquid dewets a capillary bounded by a superhydrophobic plane which faces a smooth hydrophilic wall of variable contact angle. We present results for the dependence of the depinning angle on the shape and spacing of the posts, and discuss the form of the meniscus at depinning. We find, in agreement with [17], that the local post concentration is a primary factor in controlling the depinning angle, and show that the numerical results agree well with recent experiments. We also present two examples of metastable pinned configurations where the posts are partially wet.

  3. Non-Contact Gaging with Laser Probe

    SciTech Connect (OSTI)

    Clinesmith, Mike

    2009-03-20T23:59:59.000Z

    A gage has been constructed using conventional (high end) components for the application of measuring fragile syntactic foam parts in a non-contact mode. Success with this approach has been achieved through a novel method of transferring (mapping) high accuracy local measurements of a coated aluminum master, taken on a Leitz Coordinate Measurement Machine (CMM), to the gage software system. The mapped data is then associated with local voltage readings from two (inner and outer) laser triangulating probes. This couples discreet laser probe offset and linearity characteristics to the measured master geometry. The gage software compares real part measured data against the master data to provide non-contact part inspection that results in a high accuracy and low uncertainty performance. Uncertainty from the part surface becomes the prevailing contributor to the gaging process. The gaging process provides a high speed, hands off measurement with nearly zero impedance.

  4. High peak power test of S-band waveguide switches

    SciTech Connect (OSTI)

    Nassiri, A.; Grelick, A.; Kustom, R.L.; White, M.

    1997-08-01T23:59:59.000Z

    The injector and source of particles for the Advanced Photon Source (APS) is a 2856-MHz S-band electron-positron linear accelerator (linac) which produces electrons with energies up to 650 MeV or positrons with energies up to 450 MeV. To improve the linac rf system availability, an additional modulator-klystron subsystem is being constructed to provide a switchable hot spare unit for each of the five existing S-band transmitters. The switching of the transmitters will require the use of SF6-pressurized waveguide switches at a peak operating power of 35 MW. A test stand was set up at the Stanford Linear Accelerator Center (SLAC) Klystron-Microwave laboratory to conduct tests characterizing the power handling capability of these waveguide switches. Test results are presented.

  5. Utilizing zero-sequence switchings for reversible converters

    DOE Patents [OSTI]

    Hsu, John S.; Su, Gui-Jia; Adams, Donald J.; Nagashima, James M.; Stancu, Constantin; Carlson, Douglas S.; Smith, Gregory S.

    2004-12-14T23:59:59.000Z

    A method for providing additional dc inputs or outputs (49, 59) from a dc-to-ac inverter (10) for controlling motor loads (60) comprises deriving zero-sequence components (V.sub.ao, V.sub.bo, and V.sub.co) from the inverter (10) through additional circuit branches with power switching devices (23, 44, 46), transforming the voltage between a high voltage and a low voltage using a transformer or motor (42, 50), converting the low voltage between ac and dc using a rectifier (41, 51) or an H-bridge (61), and providing at least one low voltage dc input or output (49, 59). The transformation of the ac voltage may be either single phase or three phase. Where less than a 100% duty cycle is acceptable, a two-phase modulation of the switching signals controlling the inverter (10) reduces switching losses in the inverter (10). A plurality of circuits for carrying out the invention are also disclosed.

  6. Fiber-optical switch controlled by a single atom

    E-Print Network [OSTI]

    Danny O'Shea; Christian Junge; Jürgen Volz; Arno Rauschenbeutel

    2013-09-12T23:59:59.000Z

    We demonstrate highly efficient switching of optical signals between two optical fibers controlled by a single atom. The key element of our experiment is a whispering-gallery mode bottle microresonator, which is coupled to a single atom and interfaced by two tapered fiber couplers. Even in the presence of the coupling fibers, the atom--resonator system reaches the strong coupling regime of cavity quantum electrodynamics (CQED), leading to a vacuum Rabi splitting in the excitation spectrum. We systematically investigate the switching efficiency of our system, i.e., the probability that the CQED fiber-optical switch redirects the light into the desired output. We obtain a large redirection efficiency reaching a raw fidelity of more than 60% without post-selection.

  7. Carrier Density Modulation in Ge Heterostructure by Ferroelectric Switching

    SciTech Connect (OSTI)

    Ponath, Patrick [University of Texas at Austin; Fredrickson, Kurt [University of Texas at Austin; Posadas, Agham B. [University of Texas at Austin; Ren, Yuan [University of Texas at Austin; Vasudevan, Rama K [ORNL; Okatan, Mahmut Baris [ORNL; Jesse, Stephen [ORNL; Aoki, Toshihiro [Arizona State University; McCartney, Martha [Arizona State University; Smith, David J [Arizona State University; Kalinin, Sergei V [ORNL; Lai, Keji [University of Texas at Austin; Demkov, Alexander A. [University of Texas at Austin

    2015-01-01T23:59:59.000Z

    The development of nonvolatile logic through direct coupling of spontaneous ferroelectric polarization with semiconductor charge carriers is nontrivial, with many issues, including epitaxial ferroelectric growth, demonstration of ferroelectric switching, and measurable semiconductor modulation. Here we report a true ferroelectric field effect carrier density modulation in an underlying Ge(001) substrate by switching of the ferroelectric polarization in the epitaxial c-axis-oriented BaTiO3 (BTO) grown by molecular beam epitaxy (MBE) on Ge. Using density functional theory, we demonstrate that switching of BTO polarization results in a large electric potential change in Ge. Aberration-corrected electron microscopy confirms the interface sharpness, and BTO tetragonality. Electron-energy-loss spectroscopy (EELS) indicates the absence of any low permittivity interlayer at the interface with Ge. Using piezoelectric force microscopy (PFM), we confirm the presence of fully switchable, stable ferroelectric polarization in BTO that appears to be single domain. Using microwave impedance microscopy (MIM), we clearly demonstrate a ferroelectric field effect.

  8. Contact Technology Transitions | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsNovember 13, 2014 BuildingEnergyEnergyConsortium Support (FixedAboutContact

  9. A Study on Real-time Multibody Simulation with Contacts

    E-Print Network [OSTI]

    - body systems with contact; in its theoretical formulation as well as in its implementation. Contact . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2 Chapter Overview . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Kinematic Constraints 7 2.1 Constraint Solver Overview . . . . . . . . . . . . . . . . . . . 7 2.2 The Constraint Equations

  10. Protein folding using contact maps Michele Vendruscolo and Eytan Domany

    E-Print Network [OSTI]

    Domany, Eytan

    Protein folding using contact maps Michele Vendruscolo and Eytan Domany Department of Physics 26 I. INTRODUCTION Computational approaches to protein folding are divided into two main categories protein fold prediction. Contact maps are a particularly manageable representation of protein structure

  11. Areas of contact and pressure distribution in bolted joints

    E-Print Network [OSTI]

    Gould, Herbert Hirsch

    1970-01-01T23:59:59.000Z

    When two plates are bolted (or riveted) together these will be in contact in the immediate vicinity of the bolt heads and separated beyond it. The pressure distribution and size of the contact zone is of considerable ...

  12. atomic aluminum contacts: Topics by E-print Network

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

    rear-contact solar cell, we 59 LOSS ANALYSIS OF BACK-CONTACT BACK-JUNCTION THIN-FILM MONOCRYSTALLINE SILICON SOLAR CELLS Renewable Energy Websites Summary: of the...

  13. Perfect electrical switching of edge channel transport in HgTe quantum wells controlled by gate voltage

    SciTech Connect (OSTI)

    Fu, Hua-Hua, E-mail: hhfu@mail.hust.edu.cn; Wu, Dan-Dan; Gu, Lei [College of Physics and Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074 (China)

    2014-08-14T23:59:59.000Z

    We present a proposal to realize a perfect electrical switching of topological edge-state transport in a HgTe quantum well (QW). In our device design, we place a strip-like top gate voltage in a conventional quantum-point-contact (QPC) region in the HgTe QW. The numerical calculations show that upon increasing the gate voltage, two new conductance channels are developed in the transport direction and just neighbouring the boundaries of the top gate. The quantum states in the new channels can couple with the edge states to open a gap in energy spectrum, and in turn the gap width can be adjusted by the gate voltage, indicating that switch-on/off of the edge channels can be manipulated in a controllable way. Our device can not only be considered as a development of the conventional QPC structure based on the HgTe QW but also provides a new route to realize topological electrical switchers.

  14. High voltage switch triggered by a laser-photocathode subsystem

    DOE Patents [OSTI]

    Chen, Ping; Lundquist, Martin L.; Yu, David U. L.

    2013-01-08T23:59:59.000Z

    A spark gap switch for controlling the output of a high voltage pulse from a high voltage source, for example, a capacitor bank or a pulse forming network, to an external load such as a high gradient electron gun, laser, pulsed power accelerator or wide band radar. The combination of a UV laser and a high vacuum quartz cell, in which a photocathode and an anode are installed, is utilized as triggering devices to switch the spark gap from a non-conducting state to a conducting state with low delay and low jitter.

  15. Ultrafast thermally induced magnetic switching in synthetic ferrimagnets

    SciTech Connect (OSTI)

    Evans, Richard F. L., E-mail: richard.evans@york.ac.uk; Ostler, Thomas A.; Chantrell, Roy W. [Department of Physics, University of York, Heslington, York YO10 5DD (United Kingdom); Radu, Ilie [Institut für Methoden und Instrumentierung der Forschung mit Synchrotronstrahlung, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489 Berlin (Germany); Rasing, Theo [Radboud University, Institute for Molecules and Materials, Heyendaalsewg 135, 6525 AJ Nijmegen (Netherlands)

    2014-02-24T23:59:59.000Z

    Synthetic ferrimagnets are composite magnetic structures formed from two or more anti-ferromagnetically coupled magnetic sublattices with different magnetic moments. Here, we report on atomistic spin simulations of the laser-induced magnetization dynamics on such synthetic ferrimagnets and demonstrate that the application of ultrashort laser pulses leads to sub-picosecond magnetization dynamics and all-optical switching in a similar manner as in ferrimagnetic alloys. Moreover, we present the essential material properties for successful laser-induced switching, demonstrating the feasibility of using a synthetic ferrimagnet as a high density magnetic storage element without the need of a write field.

  16. Retention and switching kinetics of protonated gate field effect transistors

    SciTech Connect (OSTI)

    DEVINE,R.A.B.; HERRERA,GILBERT V.

    2000-05-23T23:59:59.000Z

    The switching and memory retention time has been measured in 50 {micro}m gatelength pseudo-non-volatile memory MOSFETS containing, protonated 40 nm gate oxides. Times of the order of 3.3 seconds are observed for fields of 3 MV cm{sup {minus}1}. The retention time with protons placed either at the gate oxide/substrate or gate oxide/gate electrode interfaces is found to better than 96{percent} after 5,000 seconds. Measurement of the time dependence of the source-drain current during switching provides clear evidence for the presence of dispersive proton transport through the gate oxide.

  17. Retention and Switching Kinetics of Protonated Gate Field Effect Transistors

    SciTech Connect (OSTI)

    DEVINE,R.A.B.; HERRERA,GILBERT V.

    2000-06-27T23:59:59.000Z

    The switching and memory retention time has been measured in 50 {micro}m gatelength pseudo-non-volatile memory MOSFETs containing, protonated 40 nm gate oxides. Times of the order of 3.3 seconds are observed for fields of 3 MV cm{sup {minus}1}. The retention time with protons placed either at the gate oxide/substrate or gate oxide/gate electrode interfaces is found to better than 96% after 5,000 seconds. Measurement of the time dependence of the source-drain current during switching provides clear evidence for the presence of dispersive proton transport through the gate oxide.

  18. Low-profile high-voltage compact gas switch

    SciTech Connect (OSTI)

    Goerz, D.A.; Wilson, M.J.; Speer, R.D.

    1997-06-30T23:59:59.000Z

    This paper discusses the development and testing of a low-profile, high-voltage, spark-gap switch designed to be closely coupled with other components into an integrated high-energy pulsed-power source. The switch is designed to operate at 100 kV using SF6 gas pressurized to less than 0.7 MPa. The volume of the switch cavity region is less than 1.5 cm3, and the field stress along the gas-dielectric interface is as high as 130 kV/cm. The dielectric switch body has a low profile that is only I -cm tall at its greatest extent and nominally 2-mm thick over most of its area. This design achieves a very low inductance of less than 5 nH, but results in field stresses exceeding 500 kV/cm in the dielectric material. Field modeling was done to determine the appropriate shape for the highly stressed insulator and electrodes, and special manufacturing techniques were employed to mitigate the usual mechanisms that induce breakdown and failure in solid dielectrics. Static breakdown tests verified that the switch operates satisfactorily at 100 kV levels. The unit has been characterized with different shaped electrodes having nominal gap spacings of 2.0, 2.5, and 3.0 mm. The relationship between self-break voltage and operating pressure agrees well with published data on gas properties, accounting for the field enhancements of the electrode shapes being used. Capacitor discharge tests in a low inductance test fixture exhibited peak currents up to 25 kA with characteristic frequencies of the ringdown circuit ranging from 10 to 20 MHz. The ringdown waveforms and scaling of measured parameters agree well with circuit modeling of the switch and test fixture. Repetitive operation has been demonstrated at moderate rep-rates up to 15 Hz, limited by the power supply being used. Preliminary tests to evaluate lifetime of the compact switch assembly have been encouraging. In one case, after more than 7,000 high-current ringdown tests with approximately 30 C of total charge transferred, the switch continued to operate satisfactorily with no apparent tracking or deterioration of the insulator.

  19. The design and characterization of switched-resistor filters 

    E-Print Network [OSTI]

    Bass, James Traugott

    1983-01-01T23:59:59.000Z

    THE DESIGN AND CHARACTERIZATION OF SWITCHED-RESISTOR FILTERS A Thesis by JAMES TRAUGOTT BASS Submitted to t'ne Graduate College of Texas ARM University in partial fulf'llment of the requirement. for the degree of MASTER OF SCIENCE August... 1983 Major Subjec : Electrical Engineering THE DESIGN AND CHARACTERIZATION OF SWITCHED-RESISTOR FILTERS A THESIS BY JAMES TRAUGOTT BASS Approved as to style and content by: an a I . caper (Chairman of Committee) Nor. an C. GriswoI, d (Member...

  20. High-Power Microwave Switch Employing Electron Beam Triggering

    SciTech Connect (OSTI)

    Jay L. Hirshfield

    2012-09-19T23:59:59.000Z

    A high-power active microwave pulse compressor is described that modulates the quality factor Q of the energy storage cavity by a new means involving mode conversion controlled by a triggered electron-beam discharge through a switch cavity. The electron beam is emitted from a diamond-coated molybdenum cathode. This report describes the principle of operation, the design of the switch, the configuration used for the test, and the experimental results. The pulse compressor produced output pulses with 140 - Ă?Â?165 MW peak power, power gain of 16 - 20, and pulse duration of 16 - 20 ns at a frequency of 11.43 GHz.

  1. The design and characterization of switched-resistor filters

    E-Print Network [OSTI]

    Bass, James Traugott

    1983-01-01T23:59:59.000Z

    THE DESIGN AND CHARACTERIZATION OF SWITCHED-RESISTOR FILTERS A Thesis by JAMES TRAUGOTT BASS Submitted to t'ne Graduate College of Texas ARM University in partial fulf'llment of the requirement. for the degree of MASTER OF SCIENCE August... 1983 Major Subjec : Electrical Engineering THE DESIGN AND CHARACTERIZATION OF SWITCHED-RESISTOR FILTERS A THESIS BY JAMES TRAUGOTT BASS Approved as to style and content by: an a I . caper (Chairman of Committee) Nor. an C. GriswoI, d (Member...

  2. U.S. DEPARTMENT OF ENERGY Records Contact Appointment SECTION...

    Office of Environmental Management (EM)

    ENERGY Records Contact Appointment SECTION I. Appointment Pursuant to DOE Order 243.1B, Records Management Program, (Name) ...

  3. Einstein Manifolds and Contact Geometry Charles P. Boyer Krzysztof Galicki

    E-Print Network [OSTI]

    Einstein Manifolds and Contact Geometry Charles P. Boyer Krzysztof Galicki Abstract. We show that every K­contact Einstein manifold is Sasakian­Einstein and discuss several corollaries of this result. 1 types of Riemannian contact manifolds to construct Einstein metrics of positive scalar curvature

  4. Ohmic contacts to p-type GaP

    E-Print Network [OSTI]

    Jorge Estevez, Humberto Angel

    1996-01-01T23:59:59.000Z

    was measured by the Cox-Strack method. Ohmic contacts based on the Zn/Pd system were developed. The Zn(350A)/Pd(IOOA)/p-GaP and Zn(350A)/Pd(IOOA)/p-GaP gave rather high values of the contact resistivity, 3-8xl 0-4 f2CM2. An improvement in the contact...

  5. ASYMPTOTIC SHAPE FOR THE CONTACT PROCESS IN RANDOM ENVIRONMENT

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ASYMPTOTIC SHAPE FOR THE CONTACT PROCESS IN RANDOM ENVIRONMENT OLIVIER GARET AND R´EGINE MARCHAND in stationary random environment. These theorems gen- eralize known results for the classical contact process environment, when the contact process survives, the set Ht/t almost surely converges to a compact set

  6. Ohmic contacts to p-type GaP 

    E-Print Network [OSTI]

    Jorge Estevez, Humberto Angel

    1996-01-01T23:59:59.000Z

    was measured by the Cox-Strack method. Ohmic contacts based on the Zn/Pd system were developed. The Zn(350A)/Pd(IOOA)/p-GaP and Zn(350A)/Pd(IOOA)/p-GaP gave rather high values of the contact resistivity, 3-8xl 0-4 f2CM2. An improvement in the contact...

  7. Semiconductor-based all-optical switching for optical time-division multiplexed networks

    E-Print Network [OSTI]

    Robinson, Bryan S. (Bryan Shawn), 1975-

    2003-01-01T23:59:59.000Z

    All-optical switching will likely be required for future optical networks operating at data rates which exceed electronic processing speeds. Switches utilizing nonlinearities in semiconductor optical amplifiers (SOA) are ...

  8. Top-down proteomics reveals a unique protein S-thiolation switch...

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

    protein S-thiolation switch in Salmonella Typimurium in response to infection-like Top-down proteomics reveals a unique protein S-thiolation switch in Salmonella Typimurium...

  9. A Molecular Switch Based on Current-Driven Rotation of an Encapsulated...

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

    Switch Based on Current-Driven Rotation of an Encapsulated Cluster within a Fullerene Cage. A Molecular Switch Based on Current-Driven Rotation of an Encapsulated Cluster within a...

  10. A Multi-State Single-Molecule Switch Actuated by Rotation of...

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

    Multi-State Single-Molecule Switch Actuated by Rotation of an Encapsulated Cluster within a Fullerene Cage. A Multi-State Single-Molecule Switch Actuated by Rotation of an...

  11. Utility External Disconnect Switch: Practical, Legal, and Technical Reasons to Eliminate the Requirement

    Broader source: Energy.gov [DOE]

    This report documents the safe operation of PV systems without a utility external disconnect switch in several large jurisdictions. It includes recommendations for regulators contemplating utility external disconnect switch requirements.

  12. A scalable silicon photonic chip-scale optical switch for high performance computing systems

    E-Print Network [OSTI]

    Yoo, S. J. Ben

    A scalable silicon photonic chip-scale optical switch for high performance computing systems-scale optical switch for scalable interconnect network in high performance computing systems. The proposed

  13. Design of Single-Switch Inverters for Variable Resistance/Load Modulation Operation

    E-Print Network [OSTI]

    Roslaniec, Lukasz

    Single-Switch inverters such as the conventional Class-E inverter are often highly load sensitive, and maintain zero-voltage switching over only a narrow range of load resistances. This paper introduces a design methodology ...

  14. Why and how should innovative industries with high consumer switching costs be re-regulated?

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Why and how should innovative industries with high consumer switching costs be re-regulated? N-00973051,version1-3Apr2014 #12;Why and how should innovative industries with high consumer switching costs be re-regulated? Jackie Krafft1 and Evens Salies2 Abstract The existence of costs to consumers to switch

  15. Issues in the design of switched linear control systems: A benchmark study

    E-Print Network [OSTI]

    Duffy, Ken

    Issues in the design of switched linear control systems: A benchmark study Douglas Leith, Robert a tutorial overview of some of the issues that arise in the design of switched linear control systems, and issues concerning the realisation of switched linear controllers (and the associated transient response

  16. A Linear Programming Approach to Time Optimal Control of Integrator Switched Systems with State Constraints

    E-Print Network [OSTI]

    Antsaklis, Panos

    A Linear Programming Approach to Time Optimal Control of Integrator Switched Systems with State, USA Abstract-- In this paper, time optimal control problems of a class of integrator switched systems Recently, optimal control problems of switched and hybrid systems have attracted many researchers from

  17. A Switching Kalman Filter Model for the Motor Cortical Coding of Hand Motion

    E-Print Network [OSTI]

    Bienenstock, Elie

    A Switching Kalman Filter Model for the Motor Cortical Coding of Hand Motion Wei Wu Michael J present a Switching Kalman Filter Model (SKFM) for the real-time inference of hand kinematics from a separate test set is achieved using the Switching Kalman Filter (SKF) algorithm. Quantitative results show

  18. Switching Kalman Filter-Based Approach for Tracking and Event Detection at Traffic Intersections

    E-Print Network [OSTI]

    He, Sheng

    Switching Kalman Filter-Based Approach for Tracking and Event Detection at Traffic Intersections, and (ii) a simple event detection system using the results of a switching Kalman filter in combination outdoor traffic scenes. Keywords­ Event detection, switching Kalman filter, multi- ple cue-based tracking

  19. Polymer Based Thermo-optic Switch for Optical True Time Delay

    E-Print Network [OSTI]

    Chen, Ray

    Polymer Based Thermo-optic Switch for Optical True Time Delay Xiaolong Wanga , Brie Howleya Warfare Center, Newport, RI 02841 Abstract: A thermo-optic switch using total internal reflection interference. One practical way to implement continuous TTD is to integrate polymer based thermo-optic switches

  20. Polymer Waveguides and Thermo-Optic Switches for an Optical True Time Delay Phased Array Antenna

    E-Print Network [OSTI]

    Chen, Ray

    Polymer Waveguides and Thermo-Optic Switches for an Optical True Time Delay Phased Array Antenna device size. 2x2 thermo-optic TIR switches were fabricated with insertion losses of 2.8 dB. A 4-bit TTD loss of 23.88 dB. Keywords: Optical Waveguide, Phased Array Antenna, Thermo-Optic Switch, Polymer

  1. Frame-Scheduling for Input-Queued Switches with Energy Reconfiguration Costs

    E-Print Network [OSTI]

    preserving high throughput. The relationship between energy consumption, switch con- figuration and data consumption needed to configure the switching fabric and we assume that the energy depends on the number, power and energy consumption in high speed switches/routers become one of the most critical design

  2. The effects of mobile ATM switches on PNNI peer group operation

    SciTech Connect (OSTI)

    Martinez, L.; Sholander, P.; Tolendino, L.

    1997-04-01T23:59:59.000Z

    This contribution discusses why, and how, mobile networks and mobile switches might be discussed during Phase 1 of the WATM standards process. Next, it reviews mobile routers within Mobile IP. That IP mobility architecture may not apply to the proposed mobile ATM switches. Finally, it discusses problems with PNNI peer group formation and operation when mobile ATM switches are present.

  3. A Novel MEMS LTCC Switch Matrix Bahram Yassini, Savio Choi, Andre Zybura, Ming Yu,

    E-Print Network [OSTI]

    Yu, Ming

    A Novel MEMS LTCC Switch Matrix Bahram Yassini, Savio Choi, Andre Zybura, Ming Yu, Robert. E planar 4x4 switch matrix using microelectromechanical system (MEMS) switches and Low Temperature Cofired Ceramic (LTCC) substrate is presented for the first time. Together a 9-layer LTCC substrate and 32 MEMS

  4. JLA Journal of Legal Analysis Ho, Quinn, Did a Switch in Time Save Nine?

    E-Print Network [OSTI]

    Kammen, Daniel M.

    JLA Journal of Legal Analysis Ho, Quinn, Did a Switch in Time Save Nine? Winter 2010: Volume 2 ~ 1 DiD a Switch in time Save nine?1 Daniel E. Ho2 and Kevin M. Quinn3 AbstrAct Franklin Delano Roosevelt's court-packing plan of 1937 and the "switch in time that saved nine" animate central questions

  5. Dynamic Overlay Single-Domain Contracting for End-to-End Contract-Switching

    E-Print Network [OSTI]

    Yuksel, Murat

    and business relation- ships with other providers as well as users. To allow these much needed economic-switched inter-network will enable flexible and eco- nomically efficient management of risks and value flows as a "packet- switched" network. A contract-switched architecture will enable flexible and eco- nomically

  6. Design and Evaluation of Scalable Switching Fabrics for High-Performance Routers

    E-Print Network [OSTI]

    Tzeng, Nian-Feng

    high scalability and low costs. The considered switching fabrics are based on a multistage structure. The buffered switching fabrics under our consideration are scalable and of low costs, ideally suitable's for packets to move from their arrival LC's toward their destined LC's. Switching fabrics naturally affect

  7. Contact | U.S. DOE Office of Science (SC)

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws |Contact Us Contact UsContactContactContact

  8. Plasmon switching: Observation of dynamic surface plasmon steering by

    E-Print Network [OSTI]

    Visser, Taco D.

    Plasmon switching: Observation of dynamic surface plasmon steering by selective mode excitation a plasmon steering method that enables us to dynamically control the direction of surface plasmons generated surface plasmons are launched can be controlled. Experiments confirm that it is possible to distribute

  9. Valuation of Energy Storage: An Optimal Switching Mike Ludkovski

    E-Print Network [OSTI]

    Ludkovski, Mike

    Valuation of Energy Storage: An Optimal Switching Approach Mike Ludkovski Department of Mathematics University, Princeton, NJ 08544 rcarmona@princeton.edu, We consider the valuation of energy storage facilities within the framework of stochastic control. Our two main examples are natural gas dome storage

  10. Optically-initiated silicon carbide high voltage switch

    DOE Patents [OSTI]

    Caporaso, George J. (Livermore, CA); Sampayan, Stephen E. (Manteca, CA); Sullivan, James S. (Livermore, CA); Sanders, David M. (Livermore, CA)

    2012-02-28T23:59:59.000Z

    An improved photoconductive switch having a SIC or other wide band gap substrate material, such as GaAs and field-grading liners composed of preferably SiN formed on the substrate adjacent the electrode perimeters or adjacent the substrate perimeters for grading the electric fields.

  11. Chiral imides as potential chiroptical switches: synthesis and optical properties

    E-Print Network [OSTI]

    Wan, Xin-hua

    Chiral imides as potential chiroptical switches: synthesis and optical properties Erin K. Todd and their electrochemical, absorption, fluorescent, and chiroptical properties were examined for their potential application 613 520 2316; e-mail: wangw@ccs.carleton.ca Tetrahedron Letters 46 (2005) 587­590 Tetrahedron Letters

  12. Robust Decentralized Switching Power System Stabilisers for Interconnected

    E-Print Network [OSTI]

    Pota, Himanshu Roy

    ]. In these works, controllers are designed for multi-machine power systems using modern control techniques like system control design; Decentralized control; Switching control; Dwell time; Power system stabilizers. 1. INTRODUCTION The primary task of the power system control is to provide reliable and secure electric power

  13. Identification of Switched MIMO ARX models Laurent Bako1

    E-Print Network [OSTI]

    sys- tems modeling and control [?]. In addition, the increasing emergence of discrete event systems in many modern applications has encouraged the modeling, the estimation and the analysis of such systems adopt a polynomial decoupling representation for han- dling switched systems with multiple inputs

  14. Kalman Filter Constraint Switching for Turbofan Engine Health Estimation

    E-Print Network [OSTI]

    Simon, Dan

    Kalman Filter Constraint Switching for Turbofan Engine Health Estimation Dan Simon Cleveland State Cleveland, Ohio, 44135 Abstract Kalman filters are often used to estimate the state variables of a dynamic system. However, in the application of Kalman filters some known signal information is often either

  15. Title of Dissertation: LASER SWITCHED ELECTRON BEAM MODULATION WITH TERAHERTZ

    E-Print Network [OSTI]

    Anlage, Steven

    ABSTRACT Title of Dissertation: LASER SWITCHED ELECTRON BEAM MODULATION WITH TERAHERTZ APPLICATIONS Jonathan Neumann, PhD 2005 Dissertation Directed By: Dr. Patrick O'Shea, Department of Electrical and Computer Engineering This dissertation describes the exploration of relativistic electron beams modulated

  16. Orbit Correction for the Newly Developed Polarization-Switching Undulator

    SciTech Connect (OSTI)

    Obina, Takashi; Honda, Tohru; Shioya, Tatsuro; Kobayashi, Yukinori; Tsuchiya, Kimichika [Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Yamamoto, Shigeru [Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801 (Japan); Department of Photoscience, Graduate University for Advanced Studies, Shonan Village, Hayama, Kanagawa 240-0193 (Japan)

    2007-01-19T23:59:59.000Z

    A new scheme of undulator magnet arrangements has been proposed and developed as a polarization-switching radiation source, and its test-stand was installed in the 2.5-GeV Photon Factory storage ring (PF ring) in order to investigate the effects on the beam orbit. The closed orbit distortion (COD) over 200 {mu}m was produced in a vertical direction when we switched the polarization of the radiation from the test-stand. In a horizontal direction, the COD was less than 50{mu}m. The results agreed well with the predictions from the magnetic-field measurement on the bench. In order to suppress the CODs and realize a stable operation of the ring with the polarization-switching, we developed an orbit correction system which consists of an encoder to detect motion of magnets, a pair of beam position monitors (BPMs), signal processing parts, and a pair of steering magnets. We succeeded in suppressing the CODs to the level below 3{mu}m using the system even when we switch the polarization at a maximum frequency of 0.8 Hz.

  17. Digital control strategies for switch-mode power supply

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Digital control strategies for switch-mode power supply Xuefang Lin-Shi, Bruno Allard, Senior and a request for large regulation bandwidth. Digital control is now experi- mented for low-power low control. Fig. 1. Schematic synchronous step-down SMPS Digital control is not new in the field of Power

  18. Magnetic switching, final chapter, Book I: the ATA upgrade prototype

    SciTech Connect (OSTI)

    Birx, D.; Cook, E.; Hawkins, S.; Poor, S.; Reginato, L.; Schmidt, J.; Smith, M.W.

    1983-03-22T23:59:59.000Z

    Efforts directed at finding a 10 kHz switch to replace the current 1 kHz gas blown spark gap have culminated in a prototype for an upgrade of ATA. The design and performance of this prototype as well as possible options and recommendations concerning an eventual upgrade are described. 4 references, 9 figures.

  19. Quantum coherent switch utilizing commensurate nanoelectrode and charge density periodicities

    DOE Patents [OSTI]

    Harrison; Neil (Santa Fe, NM), Singleton; John (Los Alamos, NM), Migliori; Albert (Santa Fe, NM)

    2008-08-05T23:59:59.000Z

    A quantum coherent switch having a substrate formed from a density wave (DW) material capable of having a periodic electron density modulation or spin density modulation, a dielectric layer formed onto a surface of the substrate that is orthogonal to an intrinsic wave vector of the DW material; and structure for applying an external spatially periodic electrostatic potential over the dielectric layer.

  20. Hierarchical Coordinated Freeway On-Ramp Metering Using Switching

    E-Print Network [OSTI]

    Boyer, Edmond

    ]) is taken in this work since linear control tools can be used for analysis and control design. This model). These controllers are designed using switching control theory. A real-data based simulation is used to validate for increasing the effectiveness of the design and the evaluation of traffic monitoring and control is the use

  1. Flocking with Obstacle Avoidance in Switching Networks of Interconnected Vehicles

    E-Print Network [OSTI]

    Tanner, Herbert G.

    Flocking with Obstacle Avoidance in Switching Networks of Interconnected Vehicles Herbert G. Tanner Mechanical Engineering Department University of New Mexico Abstract--The paper introduces a set of nonsmooth- tivity requirements on the interconnection network can be relaxed due to the common objective. I

  2. Switching transients in wind farm grids Poul Srensen1)

    E-Print Network [OSTI]

    power collection grid of Nysted offshore wind farm. A number of switching events have been performed of large offshore wind farms have been developed, and there are significant plans for further offshore wind larger wind power installations such as offshore wind farms has increased the focus from TSO's on how

  3. Experimental approaches for the study of hemoglobin switching

    SciTech Connect (OSTI)

    Stamatoyannopoulos, G.; Neinhuis, A.W.

    1985-01-01T23:59:59.000Z

    This book contains papers divided among the following sections: Overview; Globin Gene Structure and Function; Mutations that Influence Hb F Production; Cell Lines Useful for Analysis of Gene Expression; Globin Gene Transfer and Expression; Molecular and Cell Biology of Hematopoiesis; Cell Biology of Switching.

  4. Modeling a Snap-Action, Variable-Delay Switch

    E-Print Network [OSTI]

    Department of Systems Biology, Harvard Medical School, Boston, Massachusetts, United States of America, 2, Cambridge, Massachusetts, United States of America When exposed to tumor necrosis factor (TNF) or TNFModeling a Snap-Action, Variable-Delay Switch Controlling Extrinsic Cell Death John G. Albeck1

  5. A UPF3-mediated regulatory switch that maintains RNA surveillance

    E-Print Network [OSTI]

    Wilkinson, Miles F.

    A UPF3-mediated regulatory switch that maintains RNA surveillance Wai-Kin Chan1, Angela D Bhalla1RNAs. The regulation of NMD is poorly understood. Here we identify a regulatory mechanism acting on two related UPF (up-frameshift) factors crucial for NMD: UPF3A and UPF3B. This regulatory mechanism, which reduces the level of UPF3A

  6. ORIGINAL ARTICLE Single ferroelectric-domain photovoltaic switch based

    E-Print Network [OSTI]

    Jo, Moon-Ho

    ORIGINAL ARTICLE Single ferroelectric-domain photovoltaic switch based on lateral BiFeO3 cells Ji serves as a basis for solid-state memory. This phenomenon can also yield an interesting photovoltaic imposed by the ferroelectric polarization vectors. Here, we demonstrate a single-domain photovoltaic

  7. Soft switched high frequency ac-link converter 

    E-Print Network [OSTI]

    Balakrishnan, Anand Kumar

    2009-05-15T23:59:59.000Z

    topology for medium and high power ac-ac, ac-dc and dc-ac applications. An ac-link formed by an inductor-capacitor pair replaces the conventional dc-link. Each leg of the converter is formed by two bidirectional switches. Power transfer from input to output...

  8. Energy Aware Computing through Probabilistic Switching: A Study of Limits

    E-Print Network [OSTI]

    Energy Aware Computing through Probabilistic Switching: A Study of Limits Krishna V. Palem, Fellow developed here for building energy-aware networks for computing, using PBITs. Interesting examples thermodynamics and, hence, can serve as a basis for energy-aware computing. While the estimates of the energy

  9. Collegiate Wind Competition Contacts | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T, Inc.'sEnergyTexas1. FeedstockCLEAN AIREmergency OperationsSafety2014Contacts

  10. Fermilab | Illinois Accelerator Research Center | Contact IARC

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

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  11. NREL: Email Contact for NREL Newsroom

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  12. Contacts for Cybersecurity | 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 want toworldPower 2010Conferencing and SpecialUs ContactUs

  13. Contacts for Services | 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 want toworldPower 2010Conferencing andContacts for Services

  14. Administrative Contacts | Stanford Synchrotron Radiation Lightsource

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  15. Contact Information Systems | The Ames Laboratory

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  16. Contact Us - HPMC Occupational Health Services

    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. DOEThe Bonneville Power Administration would likeConstitution And Bylaws | NationalContactAbout HPMC OMS >

  17. ORISE Science Education Programs: Contact Us

    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 Science (SC)Integrated CodesTransparencyDOE Project *1980-1981 U.S. OR I GIPuertoContact Us Dean

  18. ORISE: Contact Us - Scientific Peer Review

    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 Science (SC)Integrated CodesTransparencyDOE Project *1980-1981ChemicalComprehensiveContact Us Tony

  19. ORISE: Contact Us | Worker Health Studies

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

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  20. Tribal Points of Contacts | 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 offOCHCO Overview OCHCOSystems Analysis Success| Department ofServicesPoints of Contacts Tribal

  1. coal contacts | netl.doe.gov

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  2. Energy Saver Website Contact | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122Commercial602 1,39732 DOE FOrdersServices »DeployingofLandscapingWebsite Contact

  3. Legacy Management Contacts | Department of Energy

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

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  4. Fermilab Office of General Counsel - Contact Us

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  5. Contact Information | Princeton Plasma Physics Lab

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  6. Contact Us - Working With Us | NREL

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  7. Template:ContactInfo | Open Energy Information

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  8. MaxxContact | Open Energy Information

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    Open Energy Info (EERE)

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  10. PBL Customer Service Centers (pbl/contact)

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  11. Method of forming contacts for a back-contact solar cell

    DOE Patents [OSTI]

    Manning, Jane

    2013-07-23T23:59:59.000Z

    Methods of forming contacts for back-contact solar cells are described. In one embodiment, a method includes forming a thin dielectric layer on a substrate, forming a polysilicon layer on the thin dielectric layer, forming and patterning a solid-state p-type dopant source on the polysilicon layer, forming an n-type dopant source layer over exposed regions of the polysilicon layer and over a plurality of regions of the solid-state p-type dopant source, and heating the substrate to provide a plurality of n-type doped polysilicon regions among a plurality of p-type doped polysilicon regions.

  12. Spin-transfer switching of orthogonal spin-valve devices at cryogenic temperatures

    SciTech Connect (OSTI)

    Ye, L., E-mail: ly17@nyu.edu; Gopman, D. B.; Rehm, L.; Backes, D.; Wolf, G.; Kent, A. D. [Department of Physics, New York University, New York, New York 10003 (United States); Ohki, T. [Raytheon BBN Technologies, Cambridge, Massachusetts 02138 (United States); Kirichenko, A. F.; Vernik, I. V.; Mukhanov, O. A. [HYPRES, 175 Clearbrook Road, Elmsford, New York 10523 (United States)

    2014-05-07T23:59:59.000Z

    We present the quasi-static and dynamic switching characteristics of orthogonal spin-transfer devices incorporating an out-of-plane magnetized polarizing layer and an in-plane magnetized spin valve device at cryogenic temperatures. Switching at 12?K between parallel and anti-parallel spin-valve states is investigated for slowly varied current as well as for current pulses with durations as short as 200 ps. We demonstrate 100% switching probability with current pulses 0.6?ns in duration. We also present a switching probability diagram that summarizes device switching operation under a variety of pulse durations, amplitudes, and polarities.

  13. Nanosecond switching in GeSe phase change memory films by atomic force microscopy

    SciTech Connect (OSTI)

    Bosse, James L.; Huey, Bryan D., E-mail: bhuey@ims.uconn.edu [Department of Materials Science and Engineering, 97 North Eagleville Road, Unit 3136, Storrs, Connecticut 06269-3136 (United States); Grishin, Ilya; Kolosov, Oleg V. [Department of Physics, Lancaster University, Lancaster LA1 4YB (United Kingdom); Gyu Choi, Yong [Department of Materials Science and Engineering, Korea Aerospace University, Goyang-si, Gyeonggi-do, 412-791 (Korea, Republic of); Cheong, Byung-ki; Lee, Suyoun [Electronic Materials Research Center, Korea Institute of Science and Technology, Seongbuk-gu, Seoul 136-791 (Korea, Republic of)

    2014-02-03T23:59:59.000Z

    Nanosecond scale threshold switching is investigated with conducting atomic force microscopy (AFM) for an amorphous GeSe film. Switched bits exhibit 2–3 orders of magnitude variations in conductivity, as demonstrated in phase change based memory devices. Through the nm-scale AFM probe, this crystallization was achieved with pulse durations of as low as 15?ns, the fastest reported with scanning probe based methods. Conductance AFM imaging of the switched bits further reveals correlations between the switched volume, pulse amplitude, and pulse duration. The influence of film heterogeneities on switching is also directly detected, which is of tremendous importance for optimal device performance.

  14. Microwave pulse compression from a storage cavity with laser-induced switching

    DOE Patents [OSTI]

    Bolton, Paul R. (Menlo Park, CA)

    1992-01-01T23:59:59.000Z

    A laser-induced switch and a multiple cavity configuration are disclosed for producing high power microwave pulses. The microwave pulses are well controlled in wavelength and timing, with a quick rise time and a variable shape and power of the pulse. In addition, a method of reducing pre-pulse leakage to a low level is disclosed. Microwave energy is directed coherently to one or more cavities that stores the energy in a single mode, represented as a standing wave pattern. In order to switch the stored microwave energy out of the main cavity and into the branch waveguide, a laser-actuated switch is provided for the cavity. The switch includes a laser, associated optics for delivering the beam into the main cavity, and a switching gas positioned at an antinode in the main cavity. When actuated, the switching gas ionizes, creating a plasma, which becomes reflective to the microwave energy, changing the resonance of the cavity, and as a result the stored microwave energy is abruptly switched out of the cavity. The laser may directly pre-ionize the switching gas, or it may pump an impurity in the switching gas to an energy level which switches when a pre-selected cavity field is attained. Timing of switching the cavities is controlled by varying the pathlength of the actuating laser beam. For example, the pathlengths may be adjusted to output a single pulse of high power, or a series of quick lower power pulses.

  15. Interprocessor bus switching system for simultaneous communication in plural bus parallel processing system

    DOE Patents [OSTI]

    Atac, Robert (Aurora, IL); Fischler, Mark S. (Warrenville, IL); Husby, Donald E. (DeKalb, IL)

    1991-01-01T23:59:59.000Z

    A bus switching apparatus and method for multiple processor computer systems comprises a plurality of bus switches interconnected by branch buses. Each processor or other module of the system is connected to a spigot of a bus switch. Each bus switch also serves as part of a backplane of a modular crate hardware package. A processor initiates communication with another processor by identifying that other processor. The bus switch to which the initiating processor is connected identifies and secures, if possible, a path to that other processor, either directly or via one or more other bus switches which operate similarly. If a particular desired path through a given bus switch is not available to be used, an alternate path is considered, identified and secured.

  16. 1486 IEEE TRANSACTIONS ON AUTOMATIC CONTROL, VOL. 51, NO. 9, SEPTEMBER 2006 Accessibility of Switched Linear Systems

    E-Print Network [OSTI]

    Wang, Yuan

    the controllability of switched linear sys- tems. The structure of accessibility Lie algebra is revealed. Some accessi or normal) controllability of a large class of switched linear systems are obtained. Index Terms--Accessibility, controllability, Lie algebra, switched linear system. I. INTRODUCTION Consider a switched linear system _x(t) = A

  17. Contact structure for use in catalytic distillation

    DOE Patents [OSTI]

    Jones, E.M. Jr.

    1984-03-27T23:59:59.000Z

    A method is described for conducting catalytic chemical reactions and fractionation of the reaction mixture comprising feeding reactants into a distillation column reactor, contracting said reactant in liquid phase with a fixed bed catalyst in the form of a contact catalyst structure consisting of closed porous containers containing the catalyst for the reaction and a clip means to hold and support said containers, which are disposed above, i.e., on the distillation trays in the tower. The trays have weir means to provide a liquid level on the trays to substantially cover the containers. In other words, the trays function in their ordinary manner with the addition thereto of the catalyst. The reaction mixture is concurrently fractionated in the column. 7 figs.

  18. Contact structure for use in catalytic distillation

    DOE Patents [OSTI]

    Jones, E.M. Jr.

    1985-08-20T23:59:59.000Z

    A method and apparatus are disclosed for conducting catalytic chemical reactions and fractionation of the reaction mixture, comprising and feeding reactants into a distillation column reactor contracting said reactant in a liquid phase with a fixed bed catalyst in the form of a contact catalyst structure, consisting of closed porous containers containing the catalyst for the reaction and a clip means to hold and support said containers, which are disposed above, i.e., on the distillation trays in the tower. The trays have weir means to provide a liquid level on the trays to substantially cover the containers. In other words, the trays function in their ordinary manner with the addition thereto of the catalyst. The reaction mixture is concurrently fractionated in the column. 7 figs.

  19. Contact structure for use in catalytic distillation

    DOE Patents [OSTI]

    Jones, Jr., Edward M. (Friendswood, TX)

    1984-01-01T23:59:59.000Z

    A method for conducting catalytic chemical reactions and fractionation of the reaction mixture comprising feeding reactants into a distillation column reactor contracting said reactant in liquid phase with a fixed bed catalyst in the form of a contact catalyst structure consisting of closed porous containers containing the catatlyst for the reaction and a clip means to hold and support said containers, which are disposed above, i.e., on the distillation trays in the tower. The trays have weir means to provide a liquid level on the trays to substantially cover the containers. In other words, the trays function in their ordinary manner with the addition thereto of the catalyst. The reaction mixture is concurrently fractionated in the column.

  20. Contact structure for use in catalytic distillation

    DOE Patents [OSTI]

    Jones, Jr., Edward M. (Friendswood, TX)

    1985-01-01T23:59:59.000Z

    A method and apparatus for conducting catalytic chemical reactions and fractionation of the reaction mixture, comprising and feeding reactants into a distillation column reactor contracting said reactant in a liquid phase with a fixed bed catalyst in the form of a contact catalyst structure, consisting of closed porous containers containing the catalyst for the reaction and a clip means to hold and support said containers, which are disposed above, i.e., on the distillation trays in the tower. The trays have weir means to provide a liquid level on the trays to substantially cover the containers. In other words, the trays function in their ordinary manner with the addition thereto of the catalyst. The reaction mixture is concurrently fractionated in the column.