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


1

Effects of finite gain-bandwidth products on switched capacitor filters  

E-Print Network (OSTI)

the necessary algorithms. 11 3/We assume a, two phase clock with: 4il high for: (n ? 1)T & t & (n ? 1/2)T, 4i2 high for: (n ? 1/2)T & t & nT. 4/V, ?(t) is constant during clock phases and defined by: V, ?(t) ? V, ?(nT ? T) for: (nT ? T) & t & (nT). 5/In.... Present Status of Research on the Effects of Finite "GB" in Switched Capacitor Filters C. Objectives D. Procedure E. Outline of the Thesis Chapter II Chapter III Chapter IV Chapter V 4 4 6 6 8 8 II GENERAL ANALYSIS 10 A. Terminology...

Marciano, Frederic D.

2012-06-07T23:59:59.000Z

2

High-index-contrast electromechanical optical switches  

E-Print Network (OSTI)

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 ...

Bryant, Reginald (Reginald Eugene), 1978-

2011-01-01T23:59:59.000Z

3

Chem 115Lithium-Halogen ExchangeMyers RLi + R'X RX + R'Li  

E-Print Network (OSTI)

Chem 115Lithium-Halogen ExchangeMyers RLi + R'X RX + R'Li Lithium-halogen exchange reactions are essentially inert. 2 t-BuLi t-BuI + RLi t-BuLi isobutene + isobutane + LiI Lithium-halogen exchange reactions, and lithium iodide. H OEtBr H H OEtLi H1.1 eq n-BuLi Et2O, !80 °C Lau, K. S.; Schlosser, M. J. Org. Chem. 1978

4

Sampling based on local bandwidth  

E-Print Network (OSTI)

The sampling of continuous-time signals based on local bandwidth is considered in this thesis. In an intuitive sense, local bandwidth refers to the rate at which a signal varies locally. One would expect that signals should ...

Wei, Dennis

2007-01-01T23:59:59.000Z

5

OPTICAL PACKET SWITCHING George N. Rouskas, Lisong Xu  

E-Print Network (OSTI)

Chapter 1 OPTICAL PACKET SWITCHING George N. Rouskas, Lisong Xu Department of Computer Science of optical packet switching (OPS) is emerging as an alter- native to coarser-grained switching in the optical reconfigurable, bandwidth-efficient, and flexible optical layer. In this chapter we study some

6

Rx for Health Care Inzunza is a student in UCSC's  

E-Print Network (OSTI)

Rx for Health Care Inzunza is a student in UCSC's innovative Health Sciences program, one or regional health- care facility--reflects the campus's commitment to help meet the future health-care needs with people." Health-care-professional schools are looking for people with just the kind of field experience

Zhang, Yi

7

Network Bandwidth Utilization Forecast Model on High Bandwidth Network  

SciTech Connect

With the increasing number of geographically distributed scientific collaborations and the scale of the data size growth, it has become more challenging for users to achieve the best possible network performance on a shared network. We have developed a forecast model to predict expected bandwidth utilization for high-bandwidth wide area network. The forecast model can improve the efficiency of resource utilization and scheduling data movements on high-bandwidth network to accommodate ever increasing data volume for large-scale scientific data applications. Univariate model is developed with STL and ARIMA on SNMP path utilization data. Compared with traditional approach such as Box-Jenkins methodology, our forecast model reduces computation time by 83.2percent. It also shows resilience against abrupt network usage change. The accuracy of the forecast model is within the standard deviation of the monitored measurements.

Yoo, Wucherl; Sim, Alex

2014-07-07T23:59:59.000Z

8

Optical Switch  

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

seven wonders Optical Switch A key component in the laser chain, an optical switch called a plasma electrode Pockels cell (PEPC), was invented and developed at LLNL. A Pockels cell...

9

Cicada: Predictive Guarantees for Cloud Network Bandwidth  

E-Print Network (OSTI)

In cloud-computing systems, network-bandwidth guarantees have been shown to improve predictability of application performance and cost. Most previous work on cloud-bandwidth guarantees has assumed that cloud tenants know ...

LaCurts, Katrina

2014-03-24T23:59:59.000Z

10

Throttling Tor Bandwidth Parasites Technical Report  

E-Print Network (OSTI)

-019 Throttling Tor Bandwidth Parasites Rob Jansen, Paul Syverson, and Nicholas J. Hopper September 23, 2011 #12;#12;Throttling Tor Bandwidth Parasites Rob Jansen Paul Syverson U.S. Naval Research Laboratory {rob.g.jansen

Minnesota, University of

11

ITP Petroleum Refining: Energy Bandwidth for Petroleum Refining...  

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

Bandwidth for Petroleum Refining Processes ITP Petroleum Refining: Energy Bandwidth for Petroleum Refining Processes bandwidth.pdf More Documents & Publications ITP Petroleum...

12

The Rx Gene from Potato Controls Separate Virus Resistance and Cell Death Responses  

Science Journals Connector (OSTI)

...domain with unknown function that includes GLPL, CFLY, and MHD motifs. These motifs are characteristic of all NBS-LRR R...Sequence and Primary Structure of the Rx Protein. (A) Schematic diagram of the Rx coding sequence. Three exons are indicated by open...

Abdelhafid Bendahmane; Konstantin Kanyuka; David C. Baulcombe

13

Is RX J185635-375 a Quark Star?  

E-Print Network (OSTI)

Deep Chandra LETG+HRC-S observations of the isolated neutron star candidate RX J1856.5-3754 have been analysed to search for metallic and resonance cyclotron spectral features and for pulsation behaviour. As found from earlier observations, the X-ray spectrum is well-represented by a ~ 60 eV (7e5 K) blackbody. No unequivocal evidence of spectral line or edge features has been found, arguing against metal-dominated models. The data contain no evidence for pulsation and we place a 99% confidence upper limit of 2.7% on the unaccelerated pulse fraction over a wide frequency range from 1e-4 to 100 Hz. We argue that the derived interstellar medium neutral hydrogen column density of 8e19 heated by accretion of interstellar matter would be expected is either entirely coincidental, or current theoretical arguments excluding this scenario for RX J1856.5-3754 are premature. Taken at face value, the combined observational evidence -- a lack of spectral and temporal features and an implied radius at infinity of 3.8-8.2 km that is too small for current neutron star models -- points to a more compact object, such as allowed for quark matter equations of state.

J. J. Drake; H. L. Marshall; S. Dreizler; P. E. Freeman; A. Fruscione; M. Juda; V. Kashyap; F. Nicastro; D. O. Pease; B. J. Wargelin; K. Werner

2002-04-09T23:59:59.000Z

14

NERSC HPSS Bandwidth and Transfer Activity  

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

Activity Activity Bandwidth and Transfer Activity Data Rate vs. File Size The graph below shows the bandwidth for individual file transfers for one day. The graph also gives a quick overview of the traffic and maximum bandwidth and file size for a given day. Historical yearly peak days. Daily Rate vs. Size Aggregate Transfer Bandwidth This graph shows the aggregate transfer rate to the storage systems as a function of time of day. The red line is the peak bandwidth observed within each one minute interval. The green line is the average over ten minute intervals. Graphs for the last 8 days. Historical yearly peak days. Daily Aggregate Bandwidth Concurrent Transfers The third graph shows the number of concurrent transfers to the storage systems. The peak within each minute is shown, as well as a ten minute

15

Transparent high-data-rate optical transmission through broadband hitless bypass switches for chip-scale optical  

E-Print Network (OSTI)

of silicon photonics are its large bandwidth, low energy consumption, and small footprint components switches, with open eye-diagrams and error-free operation (BERs less than 10-12 ). Both through- and drop-ports was demonstrated [5], with switching from one input to various output ports. Here we demonstrate a hitless switch

Bergman, Keren

16

Texas Heart Institute Journal Mathematical Model Analysis of Wallstent and AneuRx  

E-Print Network (OSTI)

is the AneuRx®® AAA Stent Graft System (Medtronic, Inc.; Sunnyvale, Calif), which has self-expandable Nitinol stent rings sutured to a graft made of thin- walled, noncrimped, woven polyester.6,7 We performed

Lapin, Sergey

17

Notes on Effective Bandwidths Frank Kelly  

E-Print Network (OSTI)

1 Notes on Effective Bandwidths Frank Kelly University of Cambridge Abstract This paper presents. The paper is published in Stochastic Networks: Theory and Applications (ed. F.P. Kelly, S. Zachary and I://www.statslab.cam.ac.uk/¸frank/ . 1 #12; 2 Frank Kelly yet a generally accepted definition of an effective bandwidth, and since other

Kelly, Frank

18

Electron cyclotron resonance plasma heating in the CERA-RX facility under a randomly pulsating electric field  

Science Journals Connector (OSTI)

The results of the numerical simulation of the electron cyclotron resonance (ECR) heating of plasma particles in the CERA-RX...

A. A. Balmashnov; S. P. Stepina; A. M. Umnov

2012-12-01T23:59:59.000Z

19

On semidefinite programming bounds for graph bandwidth  

E-Print Network (OSTI)

May 24, 2011 ... We propose two new lower bounds on graph bandwidth and cyclic ... matrix computations, parallel computations, VLSI layout, etc; see, for example [19]. ...... problems by SeDuMi [30] using the Yalmip interface [22] with Matlab.

2011-05-24T23:59:59.000Z

20

ITP Glass: Industrial Glass Bandwidth Analysis Final Report,...  

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

Industrial Glass Bandwidth Analysis Final Report, August 2007 ITP Glass: Industrial Glass Bandwidth Analysis Final Report, August 2007 industrialbandwidth.pdf More Documents &...

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


21

High Bandwidth Differential Amplifier for Shock Experiments  

SciTech Connect

We developed a high bandwidth differential amplifier for gas gun shock experiments. The circuit has a bandwidth up to 1 GHz, and is capable of measuring signals of ?1.5 V with a common mode rejection of 250 V. Conductivity measurements of gas gun targets are measured by flowing high currents through the targets. The voltage is measured across the target using a technique similar to a four-point probe. Because of the design of the current source and load, the target voltage is approximately 250 V relative to ground. Since the expected voltage change in the target is < 1 V, the differential amplifier must have a large common mode rejection. Various amplifying designs are shown, although the increased amplification decreases bandwidth. Bench tests show that the amplifier can withstand significant common mode DC voltage and measure 10 ns, and 50 mV signals.

Ross, P., Tran, V., Chau, R.

2012-10-01T23:59:59.000Z

22

Energy and Bandwidth Efficiency in Wireless  

E-Print Network (OSTI)

#12;Energy-Bandwidth Efficiency Tradeoff #12;Shannon's Assumption · Linear amplifier (Ideal, 100% efficient) · Point-to-point link · No receiver processing energy · Infinite delay #12;Relaxed Assumptions number of hops => large amount of receiver energy consumption. ! " #12;System Model · Assumptions · Power

23

Service Violation Monitoring Model for Detecting and Tracing Bandwidth Abuse  

Science Journals Connector (OSTI)

Bandwidth abuse is a critical Internet service violation. However, its origins are ... capable and scalable mechanism to deal with bandwidth abuse. This paper proposes a distributed edge-to ... compared with SLA-...

Abdulghani Ali Ahmed; Aman Jantan

2013-06-01T23:59:59.000Z

24

High Bandwidth Differential Amplifier for Shock Experiments  

SciTech Connect

We developed a high bandwidth differential amplifier for gas gun shock experiments/applications. The circuit has a bandwidth > 1 GHz, and is capable of measuring signals of ?1.5 V with a common mode rejection of 250 V. Conductivity measurements of gas gun targets are measured by flowing high currents through the targets. The voltage is measured across the target using a technique similar to a four-point probe. Because of the design of the current source and load, the target voltage is approximately 250 V relative to ground. Since the expected voltage change in the target is < 1 V, the differential amplifier must have a large common mode rejection. High pass filters suppress internal ringing of operational amplifiers. Results of bench tests are shown.

Ross, P. W., Tran, V., Chau, R.

2012-04-30T23:59:59.000Z

25

Latching micro optical switch  

DOE Patents (OSTI)

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.

Garcia, Ernest J; Polosky, Marc A

2013-05-21T23:59:59.000Z

26

E-Print Network 3.0 - achieve high bandwidth Sample Search Results  

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

Estimation Summary: . However, the underestimated bandwidth can be used when the load is high; therefore, there is bandwidth... " bandwidth estimation. QoS-aware routing...

27

Remote switch actuator  

DOE Patents (OSTI)

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.

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

2013-01-29T23:59:59.000Z

28

The effects of R/X ratios on power system minimum loss  

E-Print Network (OSTI)

Impedanoe 20+$40 20+ 40 R/X ratio 1/2 1 2 X17 Angle (degrees -5 -7. 5 -10. 0 -12. 5 -15. 0 10 I R 2, 03 2 ' 44 3e04 3. 68 4. 60 5+76 2. 45 3. 77 5. 68 TOTAL 4, 06 4. 88 6. 08 7. 36 9 ~ 20 lla52 4 ' 90 7+54 11, 36 I Z 4 ' 53..., itions: (1) The line impedanoes and R/X ratios are, Line 134 Im edanoe 0 100 5 10 R ratio 1 2 1 2 X17 Angle (degrees) 2 ~ 5 o95 i+90 TOTAL IR IX ~ 87 i 1. 74 I Z 1 ~ 95 2. 12 P 0' OS I R I X I Z 100. 0 108 ' 8 -5 ' 0 i+13 2+26 2...

Denison, John Scott

2012-06-07T23:59:59.000Z

29

Triggered plasma opening switch  

DOE Patents (OSTI)

A triggerable opening switch for a very high voltage and current pulse includes a transmission line extending from a source to a load and having an intermediate switch section including a plasma for conducting electrons between transmission line conductors and a magnetic field for breaking the plasma conduction path and magnetically insulating the electrons when it is desired to open the switch.

Mendel, Clifford W. (Albuquerque, NM)

1988-01-01T23:59:59.000Z

30

Spire Semiconductor formerly Bandwidth Semiconductor LLC | Open Energy  

Open Energy Info (EERE)

Semiconductor formerly Bandwidth Semiconductor LLC Semiconductor formerly Bandwidth Semiconductor LLC Jump to: navigation, search Name Spire Semiconductor (formerly Bandwidth Semiconductor LLC) Place Hudson, New Hampshire Zip 3051 Product Spire-owned US-based manufacturer of gallium-arsenide (GaAs) cells; offers design and manufacturing capabilities of concentrator cells. References Spire Semiconductor (formerly Bandwidth Semiconductor LLC)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Spire Semiconductor (formerly Bandwidth Semiconductor LLC) is a company located in Hudson, New Hampshire . References ↑ "Spire Semiconductor (formerly Bandwidth Semiconductor LLC)" Retrieved from "http://en.openei.org/w/index.php?title=Spire_Semiconductor_formerly_Bandwidth_Semiconductor_LLC&oldid=351621"

31

Wide-Field Weak Lensing by RX J13471145  

Science Journals Connector (OSTI)

We present an analysis of weak-lensing observations for RX J1347-1145 over a 43' ? 43' field taken in B and R filters on the Blanco 4 m telescope at CTIO. RX J1347-1145 is a massive cluster at redshift z = 0.45. Using a population of galaxies with 20 R p v = 1400 km s-1 for a singular isothermal sphere model and r200 = 3.5 Mpc with c = 15 for an NFW model in an ?m = 0.3, ?? = 0.7 cosmology. In addition, a mass-to-light ratio M/LR = 90 20 M?/LR? was determined. These values are consistent with the previous weak-lensing study of RX J1347-1145 by Fischer & Tyson, giving strong evidence that systemic bias was not introduced by the relatively small field of view in that study. Our best-fit parameter values are also consistent with recent X-ray studies by Allen et al. and Ettori et al. but are not consistent with recent optical velocity dispersion measurements by Cohen & Kneib.

Thomas P. Kling; Ian Dell'Antonio; David Wittman; J. Anthony Tyson

2005-01-01T23:59:59.000Z

32

Optical flow switching  

E-Print Network (OSTI)

Present-day networks are being challenged by dramatic increases in bandwidth demand of emerging applications. We will explore a new transport, ldquooptical flow switchingrdquo, that will enable significant growth and ...

Chan, Vincent W. S.

33

Design and Demonstration of an All-Optical Hybrid Packet and Circuit Switched Network Platform  

E-Print Network (OSTI)

nominally support up to 10 Gb/s per port [1], it is becoming restrictively costly to maintain large electronic means in terms of capacity, power consumption, and bandwidth-distance product [2]. By leveraging), the energy per switched bit can be greatly reduced, potentially enabling scalability to hundreds of thousands

Bergman, Keren

34

Broadband CMOS-Compatible Silicon Photonic Electro-Optic Switch for Photonic Networks-on-Chip  

E-Print Network (OSTI)

-on-chip (NoCs) offer an attractive solution for bandwidth scalability with reduced power consumption reconfiguration [1]. Electro-optic control of these broadband switches enables a more scalable and energy signal between the through port and the drop port is accomplished with the detuning of the right cavity

Bergman, Keren

35

Effective switching frequency multiplier inverter  

DOE Patents (OSTI)

A switching frequency multiplier inverter for low inductance machines that uses parallel connection of switches and each switch is independently controlled according to a pulse width modulation scheme. The effective switching frequency is multiplied by the number of switches connected in parallel while each individual switch operates within its limit of switching frequency. This technique can also be used for other power converters such as DC/DC, AC/DC converters.

Su, Gui-Jia (Oak Ridge, TN); Peng, Fang Z. (Okemos, MI)

2007-08-07T23:59:59.000Z

36

ITP Petroleum Refining: Energy Bandwidth for Petroleum Refining Processes  

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

This energy bandwidth analysis provides a realistic estimate of the energy that may be saved in petroleum refining processes by quantifying measures of energy consumption.

37

U.S. Mining Industry Energy Bandwidth Study  

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

This bandwidth analysis report was conducted to assist the ITP Mining R&D program in identifying energy-saving opportunities in coal, metals, and mineral mining.

38

Increase of the grating coupler bandwidth with a graphene overlay  

SciTech Connect

We present theoretical and experimental results that demonstrate an increase in the grating bandwidth by placing a graphene on the chip. A focusing subwavelength grating with coupling efficiency of ?4.3?dB and 1?dB bandwidth of ?60?nm was demonstrated. After a graphene sheet was transferred onto the chip, the maximum 1?dB bandwidth was increased to ?72?nm. Experimental results are consistent with the calculated graphene induced waveguide refractive index and dispersion changes, and the bandwidth improvement may be attributed to the reduction of grating dispersion. This study may be of interest for graphene-on-silicon photonic integrated circuit applications.

Cheng, Zhenzhou; Li, Zhen; Xu, Ke; Tsang, Hon Ki, E-mail: hktsang@ee.cuhk.edu.hk [Department of Electronic Engineering, The Chinese University of Hong Kong, Shatin (Hong Kong)

2014-03-17T23:59:59.000Z

39

Thermally actuated thermionic switch  

DOE Patents (OSTI)

A thermally actuated thermionic switch which responds to an increase of temperature by changing from a high impedance to a low impedance at a predictable temperature set point. The switch has a bistable operation mode switching only on temperature increases. The thermionic material may be a metal which is liquid at the desired operation temperature and held in matrix in a graphite block reservoir, and which changes state (ionizes, for example) so as to be electrically conductive at a desired temperature.

Barrus, D.M.; Shires, C.D.

1982-09-30T23:59:59.000Z

40

Solid state switch  

DOE Patents (OSTI)

A solid state switch, with reverse conducting thyristors, is designed to operate at 20 kV hold-off voltage, 1500 A peak, 1.0 .mu.s pulsewidth, and 4500 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.

Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA)

1994-01-01T23:59:59.000Z

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


41

A centralized approach to bandwidth allocation and connection management in switched Lans  

E-Print Network (OSTI)

ensures that resource reservation is resorted to when the network load exceeds a specified threshold. Real time connections are handled by a compulsory resource reservation protocol to ensure that the deadlines are always met. Non-real time connections...

Sankaran, Kumar

2012-06-07T23:59:59.000Z

42

DBA-VM: Dynamic Bandwidth Allocator for Virtual Machines  

E-Print Network (OSTI)

DBA-VM: Dynamic Bandwidth Allocator for Virtual Machines Ahmed Amamou, Manel Bourguiba, Kamel for Virtual Machines with regard to the established SLAs. The proposed scheme enforces the isolation between the virtual machines through the transmission bandwidth adjustment at the network I/O channel

Paris-Sud XI, Université de

43

Noise and Bandwidth Performance of Single-Molecule Biosensors  

E-Print Network (OSTI)

Noise and Bandwidth Performance of Single-Molecule Biosensors J. Rosenstein, S. Sorgenfrei, K. L and nanotube field-effect transistors offer different tradeoffs between bandwidth and noise levels. Here, we on force spectroscopy, such as optical tweezers [4] and atomic force microscopy [5]. New electrochemical

Shepard, Kenneth

44

Optimal Energy-Bandwidth Allocation for Energy Harvesting Interference Networks  

E-Print Network (OSTI)

Optimal Energy-Bandwidth Allocation for Energy Harvesting Interference Networks Zhe Wang, Vaneet@research.att.com Abstract--We develop optimal energy-bandwidth allocation algorithm for the energy harvesting transmitters in interference networks. We assume that both the channel gain and the harvested energy are known for K slots

Fisher, Kathleen

45

On bounding the bandwidth of graphs with symmetry - Optimization ...  

E-Print Network (OSTI)

Hamming graph H(2,q) (also known as the lattice graph) has bandwidth equal to. (q+1)q. 2. ?1 .... 59. 10 3 120. 72. 75. 76. 90. Table 9: Bounds on the bandwidth of K(v,2) and K(v,3). v d meig .... Freeman, San Francisco, 1979. [19] Graham, A.

2013-08-08T23:59:59.000Z

46

Photoconductive switch package  

DOE Patents (OSTI)

A photoconductive switch is formed of a substrate that has a central portion of SiC or other photoconductive material and an outer portion of cvd-diamond or other suitable material surrounding the central portion. Conducting electrodes are formed on opposed sides of the substrate, with the electrodes extending beyond the central portion and the edges of the electrodes lying over the outer portion. Thus any high electric fields produced at the edges of the electrodes lie outside of and do not affect the central portion, which is the active switching element. Light is transmitted through the outer portion to the central portion to actuate the switch.

Ca[rasp, George J

2013-10-22T23:59:59.000Z

47

Solid state switch  

DOE Patents (OSTI)

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.

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

1994-07-19T23:59:59.000Z

48

A STATIONARY STATE APPROACH TO RADIATIONLESS TRANSITIONS: RADIATION BANDWIDTH EFFECT ON EXCITATION PROCESSES IN POLYATOMIC MOLECULES  

Science Journals Connector (OSTI)

...bandwidth of the incident radiation. The conditions of...sufficiently narrow radiation bandwidths, it is demonstrated...should be regarded as occuring to molecular stationary...RADIATIONLESS TRANSITIONS: RADIATION BANDWIDTH EFFECT ON...usual approach, are naturally taken into account...

William Rhodes; Bryan R. Henry; Michael Kasha

1969-01-01T23:59:59.000Z

49

Plasmonic enhanced ultrafast switch.  

SciTech Connect

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.

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

2009-09-01T23:59:59.000Z

50

An optical switch  

DOE Patents (OSTI)

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.

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

1987-04-30T23:59:59.000Z

51

Cygnus PFL Switch Jitter  

SciTech Connect

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.

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

2007-07-21T23:59:59.000Z

52

Cygnus Water Switch Jitter  

SciTech Connect

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 pulseforming 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.

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

2008-03-01T23:59:59.000Z

53

A radiation hard vacuum switch  

DOE Patents (OSTI)

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. 3 figs.

Boettcher, G.E.

1988-07-19T23:59:59.000Z

54

Design of a Crossbar Switch Chip for Use in a Demonstration System of an Optoelectronic Multi-Chip Module  

E-Print Network (OSTI)

Design of a Crossbar Switch Chip for Use in a Demonstration System of an Optoelectronic Multi in the area of optoelectronic interconnection and packaging technology in order to proliferate the feasibility of extremely high bandwidth and low latency optoelectronic "multi-chip modules" (OE-MCMs). Our group

Bakos, Jason D.

55

Definition: Two-Way Communications (High Bandwidth) | Open Energy  

Open Energy Info (EERE)

Two-Way Communications (High Bandwidth) Two-Way Communications (High Bandwidth) Jump to: navigation, search Dictionary.png Two-Way Communications (High Bandwidth) A two-way communications infrastructure that can network one or more parts of the smart grid via secure, high speed, high bandwidth connections. This infrastructure system serves as the backbone of the customer systems, AMI, distribution, and transmission smart grid systems.[1] View on Wikipedia Wikipedia Definition A smart meter is usually an electrical meter that records consumption of electric energy in intervals of an hour or less and communicates that information at least daily back to the utility for monitoring and billing purposes. Smart meters enable two-way communication between the meter and the central system. Unlike home energy monitors,

56

Property:Bandwidth(kHz) | Open Energy Information  

Open Energy Info (EERE)

Bandwidth(kHz) Bandwidth(kHz) Jump to: navigation, search Property Name Bandwidth(KHz) Property Type String Pages using the property "Bandwidth(kHz)" Showing 25 pages using this property. (previous 25) (next 25) C Conte Large Flume + 44 + Conte Small Flume + 44 + D Davidson Laboratory Tow Tank + .025 typical; can measure at higher frequencies if needed + DeFrees Flume 1 + 1000 + DeFrees Flume 2 + 1000 + DeFrees Flume 4 + 1000 + DeFrees Large Wave Basin + 1000 + DeFrees Small Wave Basin + 1000 + H Hinsdale Wave Basin 1 + Up to 1 MS/s + Hinsdale Wave Basin 2 + Up to 1 MS/s + M MHL 2D Wind/Wave + 20 + MHL Free Surface Channel + 20 + MHL High Speed Cavitation + 20 + MHL Student Tunnel + 20 + MHL Tow Tank + 20 + MIT Tow Tank + +/- 10V + Maine Tow Tank + 10 +

57

On the Functional Relation Between Quality Factor and Fractional Bandwidth  

E-Print Network (OSTI)

The functional relation between the fractional band-width and the quality factor of a radiating system is investigated in this note. Several widely used definitions of the quality factor are compared on two examples of RLC circuits that serve as a simplified model of a single resonant antenna tuned to its resonance. It is demonstrated that for a first-order system, only the quality factor based on differentiation of input impedance has unique proportionality to the fractional bandwidth, whereas e.g. the classical definition of the quality factor, i. e. the ratio of the stored energy to the lost energy per one cycle, is not uniquely proportional to the fractional bandwidth. In addition, it is shown that for higher-order systems the quality factor based on differentiation of the input impedance ceases to be uniquely related to the fractional bandwidth.

Capek, Miloslav; Hazdra, Pavel

2014-01-01T23:59:59.000Z

58

ITP Steel: Steel Industry Energy Bandwidth Study October 2004  

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

An energy "bandwidth" analysis that identifies the theoretical minimum amount of energy required for each major operation within a given industry, the current amount of energy that is used in operation, and the difference between the two.

59

Efficiently Monitoring Bandwidth and Latency in IP Networks  

E-Print Network (OSTI)

topologies. I. INTRODUCTION £ HE explosive growth in Internet and intranet deployment for a constantly- ternet link characteristics [6], [7], and packet-pair algorithms for measuring link bandwidth [8], [9

Chan, Chee Yong

60

Switching power pulse system  

DOE Patents (OSTI)

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.

Aaland, K.

1983-08-09T23:59:59.000Z

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


61

Microfabricated triggered vacuum switch  

DOE Patents (OSTI)

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.

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

2010-05-11T23:59:59.000Z

62

Switching power supply  

DOE Patents (OSTI)

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.

Mihalka, A.M.

1984-06-05T23:59:59.000Z

63

Switching power pulse system  

DOE Patents (OSTI)

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.

Aaland, Kristian (Livermore, CA)

1983-01-01T23:59:59.000Z

64

Ultrafast pulsed laser utilizing broad bandwidth laser glass  

DOE Patents (OSTI)

An ultrafast laser uses a Nd-doped phosphate laser glass characterized by a particularly broad emission bandwidth to generate the shortest possible output pulses. The laser glass is composed primarily of P{sub 2}O{sub 5}, Al{sub 2}O{sub 3} and MgO, and possesses physical and thermal properties that are compatible with standard melting and manufacturing methods. The broad bandwidth laser glass can be used in modelocked oscillators as well as in amplifier modules. 7 figs.

Payne, S.A.; Hayden, J.S.

1997-09-02T23:59:59.000Z

65

Bandwidth utilization maximization of scientific RF communication systems  

SciTech Connect

A method for more efficiently utilizing the frequency bandwidth allocated for data transmission is presented. Current space and range communication systems use modulation and coding schemes that transmit 0.5 to 1.0 bits per second per Hertz of radio frequency bandwidth. The goal in this LDRD project is to increase the bandwidth utilization by employing advanced digital communications techniques. This is done with little or no increase in the transmit power which is usually very limited on airborne systems. Teaming with New Mexico State University, an implementation of trellis coded modulation (TCM), a coding and modulation scheme pioneered by Ungerboeck, was developed for this application and simulated on a computer. TCM provides a means for reliably transmitting data while simultaneously increasing bandwidth efficiency. The penalty is increased receiver complexity. In particular, the trellis decoder requires high-speed, application-specific digital signal processing (DSP) chips. A system solution based on the QualComm Viterbi decoder and the Graychip DSP receiver chips is presented.

Rey, D. [Sandia National Lab., Albuquerque, NM (United States); Ryan, W. [New Mexico State Univ., Las Cruces, NM (United States); Ross, M.

1997-01-01T23:59:59.000Z

66

Latency, Occupancy, and Bandwidth in DSM Multiprocessors: A Performance Evaluation  

E-Print Network (OSTI)

Latency, Occupancy, and Bandwidth in DSM Multiprocessors: A Performance Evaluation Mainak Chaudhuri in the communication architecture of a DSM multiprocessor offers advantages in cost and design time, the impact modeling, and experiments on a flexible DSM prototype, using a range of parallel applications. We adapt

Heinrich, Mark

67

The Information Mural: Increasing Information Bandwidth in Visualizations  

E-Print Network (OSTI)

The Information Mural: Increasing Information Bandwidth in Visualizations Dean F. Jerding and John Abstract Information visualizations must allow users to browse information spaces and focus quickly on items of interest. Being able to see some representation of the entire information space provides

Stasko, John T.

68

A Neural Network Based Predictive Mechanism for Available Bandwidth  

E-Print Network (OSTI)

tested on classical trace files and compared with the well-known system NWS (Network Weather Service that minimizes duplicate packets and latency while maximizing bandwidth [2]. Two throughput metrics Size (VPS) probing methodology that measures the hop- by-hop metrics, and Packet Train Dispersion (PTD

Sun, Xian-He

69

L6: Memory Hierarchy Optimization III, Bandwidth Optimization  

E-Print Network (OSTI)

2/9/10 1 L6: Memory Hierarchy Optimization III, Bandwidth Optimization CS6963 Administrative · Next! ­ cs6963s10-teach@list.eng.utah.edu · Please use for questions to Protonu and me CS6963 2 L6:Memory CUDA installed 3 L6:MemoryHierarchyIII CS6963 Overview · Complete discussion of data placement

Hall, Mary W.

70

CREE: Making the Switch  

SciTech Connect

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.

Grider, David; Palmer, John

2014-03-06T23:59:59.000Z

71

Cygnus Diverter Switch Analysis  

SciTech Connect

The Cygnus Dual Beam Radiographic Facility consists of two 2.25-MV, 60-kA, 50-ns x-ray sources fielded in an underground laboratory at the Nevada Test Site. The tests performed in this laboratory involve study of the dynamic properties of plutonium and are called subcritical experiments. From end-to-end, the Cygnus machines utilize the following components: Marx generator, water-filled pulse-forming line (PFL), waterfilled coaxial transmission line (WTL), 3-cell inductive voltage adder (IVA), and rod-pinch diode. The upstream WTL interface to the PFL is via a radial insulator with coaxial geometry. The downstream WTL terminates in a manifold where the center conductor splits into three lines which individually connect to each of the IVA cell inputs. There is an impedance mismatch at this juncture. It is a concern that a reflected pulse due to anomalous behavior in the IVA or diode might initiate breakdown upon arrival at the upstream PFL/WTL insulator. Therefore near the beginning of the WTL a radial diverter switch is installed to protect the insulator from over voltage and breakdown. The diverter has adjustable gap spacing, and an in-line aqueous-solution (sodium thiosulfate) resistor array for energy dissipation. There are capacitive voltage probes at both ends of the WTL and on the diverter switch. These voltage signals will be analyzed to determine diverter performance. Using this analysis the usefulness of the diverter switch will be evaluated.

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

2008-02-01T23:59:59.000Z

72

A Dual Triangle Timing Circuit for Improved Performance of 4-Quadrant H-Bridge Switches  

SciTech Connect

Fermilab is in the process of upgrading its Booster Correction Element System to include full field correction element magnets to correct position and chromaticity throughout the booster cycle. This upgrade requires power supplies with maximum outputs of {+-}180V/{+-}65A, with current bandwidths of 5k Hz and with slew rates of min to max current in 1ms. For seamless operation around zero current and voltage, we use continuous switching on both sides of the bridge. Although the straightforward way of coordinating the switching on both sides of the bridge can be accomplished with one triangle timing wave and one voltage reference, we have found that using two triangle waves yields a switching coordination that effectively doubles the frequency of the differential ripple on the load and allows for better filtering of the output ripple.

Krafczyk, G.; Jensen, C.; Pfeffer, H.; Warchol, G.; /Fermilab

2009-05-01T23:59:59.000Z

73

Study of Nonthermal Emission from SNR RX J1713.73946 with Suzaku  

Science Journals Connector (OSTI)

We present results obtained from a series of observations of the supernova remnant RX J1713.73946 by Suzaku. Hard X-rays have been detected up to ~40 keV. The hard X-ray spectra are described by a power law with photon indices of ~3.0, which is larger than those below 10 keV. The combination of the spatially integrated XIS and HXD spectra clearly reveals a spectral cutoff which is linked to the maximum energy of accelerated electrons. The broadband coverage of Suzaku allows us to derive, for the first time, the energy spectrum of parent electrons in the cutoff region. The cutoff energy in the X-ray spectrum indicates that the electron acceleration in the remnant proceeds close to the Bohm diffusion limit. We discuss the implications of the spectral and morphological properties of the Suzaku data in the context of the origin of nonthermal emission. The Suzaku X-ray and H.E.S.S. gamma-ray data together hardly can be explained within a pure leptonic scenario. Moreover, the leptonic models require a weak magnetic field, which is inconsistent with the recently discovered X-ray filamentary structures and their short-term variability. The hadronic models with strong magnetic fields provide reasonable fits to the observed spectra, but require special arrangements of parameters to explain the lack of thermal X-ray emission. For morphology studies, we compare the X-ray and TeV gamma-ray surface brightness. We confirm the previously reported strong correlation between X-rays and TeV gamma rays. At the same time, the Suzaku data reveal a deviation from the general tendency, namely, the X-ray emission in the western rims appears brighter than expected from the average X-ray to gamma-ray ratio.

Takaaki Tanaka; Yasunobu Uchiyama; Felix A. Aharonian; Tadayuki Takahashi; Aya Bamba; Junko S. Hiraga; Jun Kataoka; Tetsuichi Kishishita; Motohide Kokubun; Koji Mori; Kazuhiro Nakazawa; Robert Petre; Hiroyasu Tajima; Shin Watanabe

2008-01-01T23:59:59.000Z

74

THE SN 393-SNR RX J1713.7-3946 (G347.3-0.5) CONNECTION  

SciTech Connect

Although the connection of the Chinese 'guest' star of 393 AD with the Galactic supernova remnant RX J1713.7-3946 (G347.3-0.5) made by Wang et al. in 1997 is consistent with the remnant's relatively young properties and the guest star's projected position within the 'tail' of the constellation Scorpius, there are difficulties with such an association. The brief Chinese texts concerning the 393 AD guest star make no comment about its apparent brightness, stating only that it disappeared after eight months. However, at the remnant's current estimated 1-1.3 kpc distance and A{sub V} {approx_equal} 3, its supernova (SN) should have been a visually bright object at maximum light (-3.5 to -5.0 mag) if M{sub V} = - 17 to -18 and would have remained visible for over a year. The peak brightness {approx_equal}0 mag adopted by Wang et al. and others would require the RX J1713.7-3946 supernova to have been a very subluminous event similar to or fainter than SN 2005cs in M51. We also note problems connecting SN 393 with a European record in which the Roman poet Claudian describes a visually brilliant star in the heavens around 393 AD that could be readily seen even in midday. Although several authors have suggested this account may be a reference to the Chinese supernova of 393, Scorpius would not be visible near midday in March when the Chinese first reported the 393 guest star. We review both the Chinese and Roman accounts and calculate probable visual brightnesses for a range of SN subtypes and conclude that neither the Chinese nor the Roman descriptions are easily reconciled with an expected RX J1713.7-3946 supernova brightness and duration.

Fesen, Robert A.; Milisavljevic, Dan [Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Lab, Hanover, NH 03755 (United States); Kremer, Richard [Department of History, Dartmouth College, 6107 Carson Hall, Hanover, NH 03755 (United States); Patnaude, Daniel [Smithsonian Astrophysical Observatory, Cambridge, MA 02138 (United States)

2012-02-15T23:59:59.000Z

75

A High-Performance Optoelectronic Interconnect Router: Using Increased Bandwidth to Enable Latency Reduction  

E-Print Network (OSTI)

D R A FT 1 A High-Performance Optoelectronic Interconnect Router: Using Increased Bandwidth optoelectronic interconnection network router capable of supplying and efficiently utilizing higher bandwidth routing, interconnection network, latency hiding/reduction techniques, optoelectronic router. 1

Pinkston, Timothy M.

76

Hybrid switch for resonant power converters  

DOE Patents (OSTI)

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.

Lai, Jih-Sheng; Yu, Wensong

2014-09-09T23:59:59.000Z

77

Raman scheme for adjustable-bandwidth quantum memory  

SciTech Connect

We propose a scenario of quantum memory for light based on Raman scattering. The storage medium is a vapor and the different spectral components of the input pulse are stored in different atomic velocity classes. One uses appropriate pulses to reverse the resulting Doppler phase shift and to regenerate the input pulse, without distortion, in the backward direction. The different stages of the protocol are detailed and the recovery efficiency is calculated in the semiclassical picture. Since the memory bandwidth is determined by the Raman transition Doppler width, it can be adjusted by changing the angle between the input pulse wave vector and the control beams. The optical depth also depends on the beam angle. As a consequence the available optical depth can be optimized depending on the needed bandwidth. The predicted recovery efficiency is close to 100% for large optical depth.

Le Goueet, J.-L.; Berman, P. R. [Laboratoire Aime Cotton, CNRS UPR3321, Universite Paris Sud, Batiment 505, Campus Universitaire, 91405 Orsay (France); Department of Physics and Michigan Center for Theoretical Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)

2009-07-15T23:59:59.000Z

78

Terahertz bandwidth integrated radio frequency spectrum analyzer via nonlinear optics  

E-Print Network (OSTI)

We report an integrated all-optical radio frequency spectrum analyzer based on a ~ 4cm long doped silica glass waveguide, with a bandwidth greater than 2.5 THz. We use this device to characterize the intensity power spectrum of ultrahigh repetition rate mode-locked lasers at repetition rates up to 400 GHz, and observe dynamic noise related behavior not observable with other techniques.

Ferrera, Marcello; Pasquazi, Alessia; Peccianti, Marco; Clerici, Matteo; Caspani, Lucia; Chu, Sai T; Little, Brent E; Morandotti, Roberto; Moss, David J

2014-01-01T23:59:59.000Z

79

High-bandwidth polarimeter for a high density, accelerated spheromak  

Science Journals Connector (OSTI)

A three-beam heterodyne polarimeter has been built to diagnose the PI-1 plasma injector at General Fusion Inc. The polarimeter measures plasma density and Faraday rotation which can provide estimates of magnetic field magnitude and direction. Two important calibration steps are required for the polarimeter to produce reasonable Faraday rotation signals. Beam polarization ellipticity must be measured to ensure there is a linear Faraday rotation response. In addition the two beams travelling through the plasma must be collinear to reduce error due to differences in plasma density. Once calibrated the Faraday rotation signals are in much better agreement with other diagnostics. For a null signal the Faraday rotation measurement noise floor is 0.1 at 0.5 MHz bandwidth. Comparing preliminary spheromak Faraday rotation measurements to a model the maximum error is about 0.3 at 0.5 MHz bandwidth which is primarily due to electrical noise during the injector's capacitor discharge and limitations of the model. At a bandwidth of 0.5 MHz the polarimeter has an axial resolution between 6 cm and 30 cm depending on the speed of the spheromak which varies between 30 km/s and 150 km/s. The spheromak length ranges from 0.75 m to 2 m. Additional polarimeter chords will be added in future upgrades.

Patrick J. F. Carle; Stephen Howard; Jordan Morelli

2013-01-01T23:59:59.000Z

80

Lazy Means Smart: Reducing Repair Bandwidth Costs in Erasure-coded Distributed Storage  

E-Print Network (OSTI)

- ditional bandwidth savings. 1. INTRODUCTION Erasure coding schemes, e.g. Reed-Solomon (RS) codes on the example of Reed-Solomon codes, and then explain the repair bandwidth problem. In an RS(n,k) stor- age scheme. 4. EVALUATION METHODOLOGY Evaluating the efficacy of lazy recovery in reducing repair bandwidth

Alvisi, Lorenzo

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


81

Bandwidth Estimation for IEEE 802.11-Based Ad Hoc Networks  

E-Print Network (OSTI)

Bandwidth Estimation for IEEE 802.11-Based Ad Hoc Networks Cheikh Sarr, Claude Chaudet, Guillaume for bandwidth-constrained applications. In multihop ad hoc networks, such evaluation becomes even more difficult mechanism to estimate the available bandwidth in IEEE 802.11-based ad hoc networks. Through simulations, we

Paris-Sud XI, Université de

82

Switching Surges and Air Insulation  

Science Journals Connector (OSTI)

...research-article Switching Surges and Air Insulation B. Jones Some thirteen years ago...reduction was noticed in the strength of air insulation when subjected to slowly rising positive...collected in high voltage laboratories. Insulation against switching surges is now seen...

1973-01-01T23:59:59.000Z

83

Audio Switch SpeakersAvotec  

E-Print Network (OSTI)

Control Monitor Keyboard & Mouse Audio Switch Control SpeakersAvotec USB HUB USB HUB USB CAT5FORP USB Ext Stim PC Stim Mac Laptop Audio RCA RCA USB CAT5 FORPUSB Ext Video K&M Video Video Speakers Avotec Projector Video Switch VGA RCA RCA 3T Audio and Visual Stimulus Setup DVD Drive K&MSiemens RCA

Walker, Matthew P.

84

ENERGY PARTITION BETWEEN ENERGETIC ELECTRONS AND TURBULENT MAGNETIC FIELD IN SUPERNOVA REMNANT RX J1713.7-3946  

SciTech Connect

Current observations of supernova remnant (SNR) RX J1713.7-3946 favor the leptonic scenario for the TeV emission, where the radio to X-ray emission is produced via the synchrotron process and the {gamma}-ray emission is produced via the inverse Comptonization of soft background photons, and the electron distribution can be inferred from the observed {gamma}-ray spectrum with a spectral inversion method. It is shown that the observed correlation between the X-ray and {gamma}-ray brightness of SNR RX J1713.7-3946 can be readily explained with the assumption that the energy density of energetic electrons is proportional to that of the magnetic field in such a scenario. A two-dimensional magnetohydrodynamic simulation is then carried out to model the overall emission spectrum. It is found that the total energy of electrons above {approx}1 GeV is equal to that of the magnetic field. This is the first piece of observational evidence for energy equipartition between energetic electrons and magnetic field in the downstream of strong collisionless astrophysical shocks of SNRs.

Yang Chuyuan; Liu Siming, E-mail: liusm@pmo.ac.cn, E-mail: chyy@ynao.ac.cn [Key Laboratory of Dark Matter and Space Astronomy, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China)

2013-08-20T23:59:59.000Z

85

Power Consumption of Hybrid Optical Switches  

Science Journals Connector (OSTI)

Two realization options of hybrid optical switches are evaluated with regard to power consumption. Both switches show improved energy efficiency in comparison to a pure packet...

Aleksic, Slavi?a

86

Silicon Photonics for Modulation, Switching, and Tuning  

Science Journals Connector (OSTI)

Thermal and electro-refractive silicon photonic modulators, switches, and tunable filters have been demonstrated with ultralow switching energies and high-speed operation. These...

Watts, Michael

87

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

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

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

88

Optimized scalable network switch  

DOE Patents (OSTI)

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.

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

89

Optimized scalable network switch  

DOE Patents (OSTI)

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.

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

2010-02-23T23:59:59.000Z

90

Optical Packet Switching -1 Optical Networks  

E-Print Network (OSTI)

Optical Packet Switching - 1 Optical Networks: from fiber transmission to photonic switching Optical Packet Switching Fabio Neri and Marco Mellia TLC Networks Group ­ Electronics Department e.mellia@polito.it ­ tel. 011 564 4173 #12;Optical Packet Switching - 2 · This work is licensed under the Creative Commons

Mellia, Marco

91

Wide Bandgap Extrinsic Photoconductive Switches  

SciTech Connect

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.

Sullivan, J S

2012-01-17T23:59:59.000Z

92

Regenerative switching CMOS system  

DOE Patents (OSTI)

Complementary Metal Oxide Semiconductor (CMOS) Schottky barrier Field Effect Transistor systems, which are a series combination of N and P-Channel MOSFETS, in which Source Schottky barrier junctions of the N and P-Channel Schottky barrier MOSFETS are electrically interconnected, (rather than the Drains as in conventional diffused junction CMOS), which Schottky barrier MOSFET system demonstrates Regenerative Inverting Switching Characteristics in use are disclosed. Both the N and P-Channel Schottky barrier MOSFET devices are unique in that they provide operational Drain Current vs. Drain to Source voltage as a function of Gate voltage only where the polarities of the Drain voltage and Gate voltage are opposite, referenced to the Source as a common terminal, and where the polarity of the voltage applied to the Gate is appropriate to cause Channel inversion. Experimentally derived results which demonstrate and verify the operation of N and P-Channel Schottky barrier MOSFETS actually fabricated on P and N-type Silicon respectively, by a common procedure using vacuum deposited Chromium as a Schottky barrier forming metal, are also provided. 14 figs.

Welch, J.D.

1998-06-02T23:59:59.000Z

93

Netest: A Tool to Measure the Maximum Burst Size, Available Bandwidth and Achievable Throughput  

SciTech Connect

Distinguishing available bandwidth and achievable throughput is essential for improving network applications' performance. Achievable throughput is the throughput considering a number of factors such as network protocol, host speed, network path, and TCP buffer space, where as available bandwidth only considers the network path. Without understanding this difference, trying to improve network applications' performance is like ''blind men feeling the elephant'' [4]. In this paper, we define and distinguish bandwidth and throughput, and debate which part of each is achievable and which is available. Also, we introduce and discuss a new concept - Maximum Burst Size that is crucial to the network performance and bandwidth sharing. A tool, netest, is introduced to help users to determine the available bandwidth, and provides information to achieve better throughput with fairness of sharing the available bandwidth, thus reducing misuse of the network.

Jin, Guojun; Tierney, Brian

2003-01-31T23:59:59.000Z

94

A study of Skype over IEEE 802.16 networks: voice quality and bandwidth usage.  

E-Print Network (OSTI)

??Skype, one of the popular VoIP applications, has its own redundancy mechanism to mitigate the impact of packet loss at the expense of additional bandwidth (more)

Chen, Kuan-yu

2011-01-01T23:59:59.000Z

95

Burst Switching for Energy Efficiency in Optical Networks  

Science Journals Connector (OSTI)

Energy consumption of electronic burst switching is modeled and compared to electronic packet switching in the network core and edge. It is shown that burst switching can provide...

Peng, Shuping; Hinton, Kerry James; Baliga, Jayant; Tucker, Rodney Stuart; Li, Zhengbin; Xu, Anshi

96

Optical switch using Risley prisms  

DOE Patents (OSTI)

An optical switch using Risley prisms and rotary microactuators to independently rotate the wedge prisms of each Risley prism pair is disclosed. The optical switch comprises an array of input Risley prism pairs that selectively redirect light beams from a plurality of input ports to an array of output Risley prism pairs that similarly direct the light beams to a plurality of output ports. Each wedge prism of each Risley prism pair can be independently rotated by a variable-reluctance stepping rotary microactuator that is fabricated by a multi-layer LIGA process. Each wedge prism can be formed integral to the annular rotor of the rotary microactuator by a DXRL process.

Sweatt, William C. (Albuquerque, NM); Christenson, Todd R. (Albuquerque, NM)

2003-04-15T23:59:59.000Z

97

Optical Switch Using Risley Prisms  

DOE Patents (OSTI)

An optical switch using Risley prisms and rotary microactuators to independently rotate the wedge prisms of each Risley prism pair is disclosed. The optical switch comprises an array of input Risley prism pairs that selectively redirect light beams from a plurality of input ports to an array of output Risley prism pairs that similarly direct the light beams to a plurality of output ports. Each wedge prism of each Risley prism pair can be independently rotated by a variable-reluctance stepping rotary microactuator that is fabricated by a multi-layer LIGA process. Each wedge prism can be formed integral to the annular rotor of the rotary microactuator by a DXRL process.

Sweatt, William C. (Albuquerque, NM); Christenson, Todd R. (Albuquerque, NM)

2005-02-22T23:59:59.000Z

98

1580 IEEE TRANSACTIONS ON MULTIMEDIA, VOL. 9, NO. 8, DECEMBER 2007 On Maximizing Tree Bandwidth for  

E-Print Network (OSTI)

. Measurement study based on Plan- etLab further confirms this. Our study shows that the knowledge of underlay. In this paper, we consider building a high-bandwidth overlay tree for steaming. A streaming video usually has a certain bi- trate. To ensure good streaming quality at a host, the incoming bandwidth of the host should

Chan, Shueng-Han Gary

99

Frequency response and bandwidth enhancement in Ge/Si avalanche photodiodes  

E-Print Network (OSTI)

Frequency response and bandwidth enhancement in Ge/Si avalanche photodiodes with over 840GHz gain-absorption-charge- multiplication Ge/Si avalanche photodiode with an enhanced gain- bandwidth-product of 845GHz at a wavelength photodiodes (APDs) References and links 1. R. B. Emmons, "Avalanche photodiode frequency response," J. Appl

Bowers, John

100

E ective Bandwidths of Departure Processes from Queues with Time Varying Capacities  

E-Print Network (OSTI)

E#11;ective Bandwidths of Departure Processes from Queues with Time Varying Capacities Cheng Zajic CIMAT Apartado Postal 402 36000 Guanajuato, GTO. M#19;exico Abstract In this paper, we consider process from such a queue. Two important observations are made: (i) the e#11;ec- tive bandwidths

Chang, Cheng-Shang

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


101

Queue-Length Proportional and Max-Min Fair Bandwidth Allocation for Best Effort Flows  

E-Print Network (OSTI)

and fairness principles. In this paper, we propose sequential and parallel algorithms to allocate bandwidth the max-min fairness principle, which maximizes bandwidth utilization and maintains fairness among flows. We first formulate the problem based on the allocation criterion and fairness principle. Then, we

Pan, Deng

102

Absorption line shape recovery beyond the detection bandwidth limit: application to the Boltzmann constant determination  

E-Print Network (OSTI)

1 Absorption line shape recovery beyond the detection bandwidth limit: application to the Boltzmann of the influence of detection bandwidth properties on observed line shapes in laser absorption spectroscopy the Boltzmann constant (kB) [10, 11]. Based upon laser absorption spectroscopy in the linear regime

103

X-ray bandwidth: Determination by on-edge absorption and effect on various absorption experiments  

E-Print Network (OSTI)

X-ray bandwidth: Determination by on-edge absorption and effect on various absorption experiments of an x-ray source is increasingly important in fundamental experi- ments and critical applications. The bandwidth of an x-ray beam, selected from a synchrotron radiation spectrum for example, ultimately defines

Chantler, Christopher T.

104

Definition: Remote Service Switch | Open Energy Information  

Open Energy Info (EERE)

Service Switch Service Switch Jump to: navigation, search Dictionary.png Remote Service Switch A power switch within a smart meter that allows a utility to turn electrical service to a residential customer premise on or off. The switch is remotely operated from the utility using the AMI communications infrastructure. This feature is limited to residential meters providing 200 amp service or less, and allows a utility to quickly switch service without having to roll a service truck. This can be particularly useful for reducing service time and associated costs for establishing or terminating services for move-ins/move-outs, or for switching off service for safety reasons.[1] Related Terms advanced metering infrastructure References ↑ https://www.smartgrid.gov/category/technology/remote_service_switch

105

Anode initiated surface flashover switch  

DOE Patents (OSTI)

A high voltage surface flashover switch has a pair of electrodes spaced by an insulator. A high voltage is applied to an anode, which is smaller than the opposing, grounded, cathode. When a controllable source of electrons near the cathode is energized, the electrons are attracted to the anode where they reflect to the insulator and initiate anode to cathode breakdown.

Brainard, John P. (Albuquerque, NM); Koss, Robert J. (Albuquerque, NM)

2003-04-29T23:59:59.000Z

106

Switch for serial or parallel communication networks  

DOE Patents (OSTI)

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.

Crosette, Dario B. (DeSoto, TX)

1994-01-01T23:59:59.000Z

107

Switch for serial or parallel communication networks  

DOE Patents (OSTI)

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.

Crosette, D.B.

1994-07-19T23:59:59.000Z

108

Laser bandwidth interlock capable of single pulse detection and rejection  

DOE Patents (OSTI)

A pulse of laser light is switched out of a pulse train and spatially dispersed into its constituent wavelengths. The pulse is collimated to a suitable size and then diffracted by high groove density multilayer dielectric gratings. This imparts a different angle to each individual wavelength so that, when brought to the far field with a lens, the colors have spread out in a linear arrangement. The distance between wavelengths (resolution) can be tailored for the specific laser and application by altering the number of times the beam strikes the diffraction gratings, the groove density of the gratings and the focal length of the lens. End portions of the linear arrangement are each directed to a respective detector, which converts the signal to a 1 if the level meets a set-point, and a 0 if the level does not. If both detectors produces a 1, then the pulse train is allowed to propagate into an optical system.

Armstrong, James P; Telford, Steven James; Lanning, Rodney Kay; Bayramian, Andrew James

2012-10-09T23:59:59.000Z

109

Gamma-Ray Observations of the Supernova Remnant RX J0852.0-4622 with the Fermi LAT  

SciTech Connect

We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.0-4622 with the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope. In the Fermi LAT data, we find a spatially extended source at the location of the SNR. The extension is consistent with the SNR size seen in other wavelengths such as X-rays and TeV gamma rays, leading to the identification of the gamma-ray source with the SNR. The spectrum is well described as a power law with a photon index of {Lambda} = 1.85 {+-} 0.06 (stat){sub -0.19}{sup +0.18} (sys), which smoothly connects to the H.E.S.S. spectrum in the TeV energy band. We discuss the gamma-ray emission mechanism based on multiwavelength data. The broadband data can be fit well by a model in which the gamma rays are of hadronic origin. We also consider a scenario with inverse Compton scattering of electrons as the emission mechanism of the gamma rays. Although the leptonic model predicts a harder spectrum in the Fermi LAT energy range, the model can fit the data considering the statistical and systematic errors.

Tanaka, T.; Allafort, A.; /Stanford U., HEPL /KIPAC, Menlo Park; Ballet, J.; /Saclay; Funk, S.; /Stanford U., HEPL /KIPAC, Menlo Park; Giordano, F.; /Bari U. /INFN, Bari; Hewitt, J.; /NASA, Goddard; Lemoine-Goumard, M.; /Bordeaux U.; Tajima, H.; /Stanford U., HEPL /KIPAC, Menlo Park /Nagoya U., Solar-terrestrial Environ Lab.; Tibolla, O.; /Wurzburg U.; Uchiyama, Y.; /Stanford U., HEPL /KIPAC, Menlo Park

2011-12-13T23:59:59.000Z

110

Definition: Automated Distribution Circuit Switches | Open Energy  

Open Energy Info (EERE)

Circuit Switches Circuit Switches Jump to: navigation, search Dictionary.png Automated Distribution Circuit Switches Distribution circuit switches that can be operated automatically in response to control signals from local sensors, distribution automation systems, or grid control systems. Such switches can be installed as automated devices or existing equipment can be retrofitted with controls and communications. The degree of automation depends on the controls and communications system implemented. These switches can be opened or closed to isolate portions of a distribution circuit that has experienced a short circuit (fault), or must be taken out of service for maintenance or other operations. When used in combination, these switches can reroute power from other substations or nearby distribution circuits.[1]

111

New Details of Ferroelectric Switching  

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

New Details of Ferroelectric Switching New Details of Ferroelectric Switching All of our current information technology relies on devices that process information as binary ones and zeroes. Ferroelectric materials are of special interest to developers of the next generation of such devices because they exhibit polarized electronic states that can represent bits of information. Moreover, these materials retain their polarization states without consuming electrical power, making ferroelectrics the subject of intense study for nonvolatile memory applications in which data is stored even when the power is turned off. One problem, however, is polarization fatigue: after a number of cycles, the switchable polarization begins to taper off, rendering the device unusable. Recently, a team of researchers

112

Congestion control schemes for single and parallel TCP flows in high bandwidth-delay product networks  

E-Print Network (OSTI)

high-speed TCP proposals have been suggested to overcome the limited throughput achievable by single-flow TCP by modifying its congestion control mechanisms. In the meantime, users overcome the throughput limitations in high bandwidth-delay product...

Cho, Soohyun

2006-08-16T23:59:59.000Z

113

Bandwidth scaling behavior in wireless systems : theory, experimentation, and performance analysis  

E-Print Network (OSTI)

The need for ubiquitous wireless services has prompted the exploration of using increasingly larger transmission bandwidths often in environments with harsh propagation conditions. However, present analyses do not capture ...

Gifford, Wesley M. (Wesley Michael), 1979-

2010-01-01T23:59:59.000Z

114

LDPC code-based bandwidth efficient coding schemes for wireless communications  

E-Print Network (OSTI)

This dissertation deals with the design of bandwidth-efficient coding schemes with Low-Density Parity-Check (LDPC) for reliable wireless communications. Code design for wireless channels roughly falls into three categories: (1) when channel state...

Sankar, Hari

2009-06-02T23:59:59.000Z

115

Network bandwidth requirements for optimized streaming media transmission to interactive users  

Science Journals Connector (OSTI)

In order to minimize bandwidth requirements and improve on demand streaming media distribution scalability, several distribution protocols based on stream sharing by multiple users have been proposed. Despite the great scalability of these protocols ...

Marcelo Maia; Marcus Rocha; talo Cunha; Jussara Almeida; Srgio Campos

2006-11-01T23:59:59.000Z

116

A TorPath to TorCoin: Proof-of-Bandwidth Altcoins for Compensating Relays  

E-Print Network (OSTI)

Coin, an "altcoin" that uses the Bitcoin protocol to re- ward relays for contributing bandwidth. Relays "mine" TorCoin is an alternative cryptocurrency, or altcoin, based on the Bitcoin protocol [8]. Unlike Bitcoin, its proof

117

Output Feedback Control and Optimal Bandwidth Allocation of Networked Control Systems  

E-Print Network (OSTI)

A networked control system (NCS) is a control system where sensors, actuators, and controllers are interconnected over a communication network. This dissertation presents a framework for modeling, stability analysis, optimal control, and bandwidth...

Dong, Jiawei

2013-04-12T23:59:59.000Z

118

A simple figure of merit for high temperature superconducting switches  

SciTech Connect

The discovery of the new high temperature superconductors has revived interest in many special applications, including superconducting switches. For comparison of switch types, a simple figure of merit based in switch performance is proposed, derived for superconducting switches, and then calculated for thyristors and vacuum switches. The figure of merit is then used to show what critical current density would be needed for superconducting switches to compete with more conventional switches. 46 refs., 1 fig.

Honig, E.M.

1989-01-01T23:59:59.000Z

119

Electric field and temperature measurement using ultra wide bandwidth pigtailed electro-optic probes  

E-Print Network (OSTI)

1 Electric field and temperature measurement using ultra wide bandwidth pigtailed electro bandwidth from kHz to tens of GHz with a sensitivity of 0.7 V.m-1 .Hz-1/2 and a temperature accuracy of 40 mK.1364/AO.47.002470 #12;2 Introduction In the field of high power microwave (HPM) measurements, ultra wide

Boyer, Edmond

120

Diamond switches for high temperature electronics  

SciTech Connect

Diamond switches are well suited for use in high temperature electronics. Laboratory feasibility of diamond switching at 1 kV and 18 A was demonstrated. DC blocking voltages up to 1 kV were demonstrated. A 50 {Omega} load line was switched using a diamond switch, with switch on-state resistivity {approx}7 {Omega}-cm. An electron beam, {approx}150 keV energy, {approx}2 {mu}s full width at half maximum was used to control the 5 mm x 5 mm x 100 {mu}m thick diamond switch. The conduction current temporal history mimics that of the electron beam. These data were taken at room temperature.

Prasad, R.R.; Rondeau, G.; Qi, Niansheng [Alameda Applied Sciences Corp., San Leandro, CA (United States)] [and others

1996-04-25T23:59:59.000Z

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


121

Switched reluctance motor : design, simulation and control.  

E-Print Network (OSTI)

??This thesis presents a design method for a switched reluctance (SR) motor to optimise torque production for two types of 3 phase 6/4 poles SRM (more)

Aljaism, Wadah A.

2007-01-01T23:59:59.000Z

122

Switched reluctance generator for wind power applications.  

E-Print Network (OSTI)

??The Switched Reluctance Machine (SRM) has received significant industry attention over the past few decades. It is economical, reliable, and easy to control, due to (more)

Nassereddine, Mohamad

2011-01-01T23:59:59.000Z

123

Multiprocessor switch with selective pairing  

DOE Patents (OSTI)

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

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

2014-03-11T23:59:59.000Z

124

Optoelectronic switches based on diffusive conduction Hilmi Volkan Demira  

E-Print Network (OSTI)

Optoelectronic switches based on diffusive conduction Hilmi Volkan Demira and Fatih Hakan Koklu the process of diffusive conduction that we use in our optoelectronic switches to achieve rapid optical. We demonstrate the feasibility of using such diffusive conductive optoelectronic switches

Miller, David A. B.

125

Gas mixtures for spark gap closing switches  

DOE Patents (OSTI)

Gas mixtures for use in spark gap closing switches comprised of fluorocarbons and low molecular weight, inert buffer gases. To this can be added a third gas having a low ionization potential relative to the buffer gas. The gas mixtures presented possess properties that optimized the efficiency spark gap closing switches. 6 figs.

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

1987-02-20T23:59:59.000Z

126

Ames Lab 101: Ultrafast Magnetic Switching  

SciTech Connect

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.

Jigang Wang

2013-04-08T23:59:59.000Z

127

Ames Lab 101: Ultrafast Magnetic Switching  

ScienceCinema (OSTI)

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.

Jigang Wang

2013-06-05T23:59:59.000Z

128

Swift X-ray and ultraviolet observations of the shortest orbital period double-degenerate system RX J0806.3+1527 (HM Cnc)  

E-Print Network (OSTI)

RX J0806.3+1527 (HM Cnc) is a pulsating X-ray source with 100 per cent modulation on a period of 321.5 s (5.4 min). This period reflects the orbital motion of a close binary system consisting of two interacting white dwarfs. Here we present a series of simultaneous X-ray (0.2-10 keV) and near-ultraviolet (2600 angstrom and 1928 angstrom) observations carried out with the Swift satellite. In the near-ultraviolet the counterpart of RX J0806.3+1527 was detected at flux densities consistent with a blackbody with temperature 27E+3 K. We found that the emission at 2600 angstrom is modulated at the 321.5-s period, with the peak ahead of the X-ray one by 0.28 cycles and coincident, within 0.05 cycles, with the optical. This phase-shift measurement confirms that the X-ray hot spot (located on the primary white dwarf) is at about 80-100 degrees from the direction connecting the two white dwarfs. Albeit at lower significance, the 321.5-s signature is present also in the 1928-angstrom data; at this wavelength, however, t...

Esposito, P; Dall'Osso, S; Covino, S

2013-01-01T23:59:59.000Z

129

Seismic switch for strong motion measurement  

DOE Patents (OSTI)

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.

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

1995-01-01T23:59:59.000Z

130

Seismic switch for strong motion measurement  

DOE Patents (OSTI)

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.

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

1995-05-30T23:59:59.000Z

131

Power Consumption and Scalability of Optically Switched Interconnects  

Science Journals Connector (OSTI)

We analyzed three realizations of optically switched interconnects regarding power consumption and scalability. The optically switched interconnects provide higher power efficiency...

Fehratovic, Naida; Aleksic, Slavisa

132

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...

133

Switch on Clean Energy Activity Book | Department of Energy  

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

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....

134

Flipping the switch on magnetism in strontium titanate  

NLE Websites -- All DOE Office Websites (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,...

135

Artificial molecules that switch "handedness" at light-speed  

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

molecules that switch "handedness" Artificial molecules that switch "handedness" at light-speed Researchers create the first artificial molecules whose chirality can be...

136

ESnet's On-Demand Bandwidth Reservation Service Wins R&D 100 Award  

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

ESnet's On-Demand Bandwidth ESnet's On-Demand Bandwidth Reservation Service Wins R&D 100 Award News & Publications ESnet in the News ESnet News Media & Press Publications and Presentations Galleries ESnet Awards and Honors Contact Us Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net ESnet's On-Demand Bandwidth Reservation Service Wins R&D 100 Award OSCARS Honored with "Oscar of Innovation" July 8, 2013 Contact: Jon Bashor, 510-486-5849, jbashor@lbl.gov RD100 OSCARS 0.6 was recognized as one of R&D Magazine's top 100 technologies. Widely recognized as a mark of excellence, the R&D 100 Awards are the only

137

Rotating vector methods for smooth torque control of a switched reluctance motor drive  

SciTech Connect

This paper has two primary contributions to switched reluctance motor (SRM) control: a systematic approach to smooth torque production and a high-performance technique for sensorless motion control. The systematic approach to smooth torque production is based on development of novel rotating spatial vectors methods that can be used to predict the torque produced in an arbitrary SRM. This analysis directly leads to explicit, insightful methods to provide smooth torque control of SRM's. The high-performance technique for sensorless motion control is based on a rotating vector method for high bandwidth, high resolution, position, and velocity estimation suitable for both precise torque and motion control. The sensorless control and smooth torque control methods are both verified experimentally.

Nagel, N.J.; Lorenz, R.D.

2000-04-01T23:59:59.000Z

138

Apparatus and method for increasing the bandwidth of a laser beam  

DOE Patents (OSTI)

A method and apparatus is disclosed that provides a laser output beam having a broad bandwidth and an intensity smooth over time. The bandwidth of the laser output can be varied easily by varying the intensity of a broadband source. The present invention includes an optical modulation apparatus comprising a narrowband laser that outputs a horizontally polarized beam (a "signal beam") and a broadband laser that outputs a vertically polarized beam (a "pump beam") whose intensity varies rapidly. The two beam are coupled into a birefringent laser material so that the respective polarizations coincide with the principal axes of the material. As the two beams travel through the material, the polarization preserving properties of the birefringent material maintain the respective polarizations of the two beam; however there is coupling between the two beams as a result of cross phase modulations, which induces a bandwidth change of the signal beam. The amount of bandwidth change is dependent upon the average intensity of the pump beam. The beams are coupled out from the birefringent material and the modulated signal beam is separated by a polarization selector. The modulated signal beam now has a wider bandwidth, and its shape remains smooth in time. This signal beam can be applied to incoherence inducing systems. The different bandwidths required by these different incoherence inducing systems can be obtained by varying the intensity of the pump beam. The United States Government has rights in this invention pursuant to Contract No. W7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.

Chaffee, Paul H. (Bolina, CA)

1991-01-01T23:59:59.000Z

139

Bandwidth allocation in a multiservice satellite network based on long-term weather forecast scenarios  

Science Journals Connector (OSTI)

The paper compares two alternative hierarchical bandwidth allocation and admission control schemes suited for the multiservice Ka-band satellite environment, where the attenuation of the transmitted signals due to bad weather conditions has a heavy impact on the system's performance. The two schemes are compared by using data derived from a real case study. The aim is to demonstrate that a high level control mechanism for the assignment of the satellite bandwidth to earth stations, which takes into consideration the rain attenuation probabilities of a certain geographical area, improves the system's performance, with respect to an assignment mechanism insensitive to the geographical fade probabilities.

Raffaele Bolla; Nedo Celandroni; Franco Davoli; Erina Ferro; Mario Marchese

2002-01-01T23:59:59.000Z

140

Understanding fuel switching under the EU ETS  

Science Journals Connector (OSTI)

Since the creation of the European Union Emission Trading Scheme (EU ETS), European power producers have monitored carbon emissions resulting from the composition of their production. Fuel switching is the main short-term abatement measure under the EU ETS. It consists in substituting combined cycle gas turbines (CCGTs) for hard-coal plants in off-peak power generation. Thereby coal plants run for shorter periods, allowing power producers to reduce their CO2 emissions. The aim of this paper is two-fold. First, we summarise the main characteristics of fuel switching under the EU ETS. Second, we show how differences in the energy/environmental efficiency of power plants impact the marginal cost of fuel switching. We demonstrate that the level of switching effort influences the dependence of the marginal cost of switching on fuel prices. The marginal cost of switching is shown to be increasingly dependent on the gas price as the switching effort increases, whereas the net effect is undetermined for the coal price. All the conclusions are summarised in several illustrative examples.

Vincent Bertrand

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rx bandwidth switch" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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141

Nanometer Resolution Imaging by SIngle Molecule Switching  

SciTech Connect

The fluorescence intensity of single molecules can change dramatically even under constant laser excitation. The phenomenon is frequently called "blinking" and involves molecules switching between high and low intensity states.[1-3] In additional to spontaneous blinking, the fluorescence of some special fluorophores, such as cyanine dyes and photoactivatable fluorescent proteins, can be switched on and off by choice using a second laser. Recent single-molecule spectroscopy investigations have shed light on mechanisms of single molecule blinking and photoswitching. This ability to controllably switch single molecules led to the invention of a novel fluorescence microscopy with nanometer spatial resolution well beyond the diffraction limit.

Hu, Dehong; Orr, Galya

2010-04-02T23:59:59.000Z

142

Ultra-sensitive and Wide Bandwidth Thermal Measurements of Graphene at Low Temperatures  

E-Print Network (OSTI)

exhibits one of the highest thermal conductivities of all measured materials[3, 4]. However at lowUltra-sensitive and Wide Bandwidth Thermal Measurements of Graphene at Low Temperatures K.C. Fong. This paper is organized as follows. We first present the thermal model of the electron gas of graphene at low

143

Bandwidth-aware Co-allocating Meta-schedulers for Mini-grid Architectures  

E-Print Network (OSTI)

Bandwidth-aware Co-allocating Meta-schedulers for Mini-grid Architectures William M. Jones Louis W Laboratory Clemson University Clemson, South Carolina http://www.parl.clemson.edu 1 #12;What is a Mini-grid contention Job 1 Job 3 Job 2 3 #12;Models Architecture LaboratoryResearch Parallel PARL Mini-grid Topology

Jones, William Michael

144

Design of a Wide Bandwidth Continuous-time Low-pass Sigma-delta Modulator  

E-Print Network (OSTI)

bandwidth by using a feed-forward topology is presented. The system is first built in the Simulink environment in MATLAB. The building blocks in the loop filter are modeled with non-idealities, and specifications for these blocks are obtained by simulations...

Chien, Cheng-Ming

2012-02-14T23:59:59.000Z

145

Design of Two Lightweight, High-Bandwidth Torque-Controlled Ankle Exoskeletons  

E-Print Network (OSTI)

Design of Two Lightweight, High-Bandwidth Torque-Controlled Ankle Exoskeletons Kirby Ann Witte1 and assist gait. We designed and built two tethered ankle-foot exoskeletons with strong lightweight frames tracking error. These performance measures compare favorably with previous devices and with human ankle

Collins, Steven H.

146

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

E-Print Network (OSTI)

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

Brightwell, Ron

147

Reducing WWW Latency and Bandwidth Requirements by RealTime Distillation  

E-Print Network (OSTI)

Reducing WWW Latency and Bandwidth Requirements by Real­Time Distillation Armando Fox and Eric A Distillation and Refinement Can Help 1. The Concept of Datatype­Specific Distillation 2. Refinement 3. Trading. Optimizing for Rendering on Impoverished Devices 3. An Implemented HTTP Proxy Based on Real­Time Distillation

California at Berkeley, University of

148

Insensitive bandwidth sharing in data networks T. Bonald and A. Prouti`ere  

E-Print Network (OSTI)

.1 Utility-based allocations The way bandwidth is shared in current data networks or should be shared in order to maximize some overall utility, where the utility of an individual flow is a function of its distributed congestion control to appear in Queueing Systems 1 #12;algorithm [16]. In line with this approach

Bonald, Thomas

149

A precomputation-based scheme for qos routing and fair bandwidth allocation  

Science Journals Connector (OSTI)

We propose a precomputation-based scheme offering Pareto optimal solutions to the network optimization problem. This scheme precomputes bandwidth allocation (rate vector) and end-to-end paths with QoS guarantees. It prepares a routing database, identifying ... Keywords: QoS routing, communication networks, proportional fairness

Chia-Hung Wang; Hsing Luh

2006-12-01T23:59:59.000Z

150

Tracking Waves and Spiral Drift in Reaction-Diffusion Systems with Finite Bandwidth Dispersion Relations  

E-Print Network (OSTI)

LETTERS Tracking Waves and Spiral Drift in Reaction-Diffusion Systems with Finite Bandwidth We report experimental results on chemical waves in 1,4-cyclohexanedione Belousov-Zhabotinsky systems are unstable, pacemakers can generate short-wavelength patterns in which fast waves periodically annihilate

Steinbock, Oliver

151

EDIC RESEARCH PROPOSAL 1 Exploiting Bandwidth in 3D-Integrated Chip  

E-Print Network (OSTI)

integration enables more efficient usage of chip area and can lower the total chip power. As the applications to physical and energy limits, transistor miniaturization might not be the main tool for achieving the Moore bandwidth, shared among processor cores, graph- ical processing units and accelerators, is another important

152

Workload Characterization and Analysis of Storage and Bandwidth Needs of LEAD Workspace  

E-Print Network (OSTI)

the scalability and reliability of a software system. A workload is a set of requests, often based-related resource demand, specifically bandwidth in and out of the repository, and spinning disk and tape archive is in addition to community data collections, collections of observational and some model generated data that has

Plale, Beth

153

DRAFT: NONLINEAR CONTROLLER DESIGN WITH BANDWIDTH CONSIDERATION FOR A NOVEL COMPRESSED AIR ENERGY STORAGE SYSTEM  

E-Print Network (OSTI)

regulation and gen- erator power tracking for a Compressed Air Energy Storage (CAES) system, a nonlinearDRAFT: NONLINEAR CONTROLLER DESIGN WITH BANDWIDTH CONSIDERATION FOR A NOVEL COMPRESSED AIR ENERGY available wind power in normal situations. Storing energy in high pressure compressed air is attractive

Li, Perry Y.

154

Optically Interconnected Data Center Architecture for Bandwidth Intensive Energy Efficient Networking  

E-Print Network (OSTI)

Optically Interconnected Data Center Architecture for Bandwidth Intensive Energy Efficient) 854 2900, e-mail: howard@ee.columbia.edu ABSTRACT The relentless rise of data-intensive cloud will either be prohibitively costly, overly complex, or result in unsustainable energy requirements. Network

Bergman, Keren

155

On the joint distribution of wave heights and periods: The role of the spectral bandwidth  

SciTech Connect

The influence of spectral bandwidth on the probabilistic structure of the joint distribution of wave heights and periods is analyzed by means of simulated wave records. The authors put the emphasis on its effect upon the asymmetric and bimodal structure of the distributions. Moreover, the adequacy of some theoretical models to describe such features is considered.

Rodriguez, R.G.; Rubio, R.F.; Pacheco, M.M.; Martinez, M.A. [Univ. de Las Palmas de Gran Canaria (Spain). Dept. de Fisica

1996-12-31T23:59:59.000Z

156

Wind Power System Simulation of Switch Control  

Science Journals Connector (OSTI)

In order to find a balance between energy efficiency and reliability of wind power generation system, this paper presents a ... switch control strategy. This paper establishes a wind power system simulation model...

Yuehua Huang; Guangxu Li; Huanhuan Li

2014-01-01T23:59:59.000Z

157

Mercury switch with non-wettable electrodes  

DOE Patents (OSTI)

A mercury switch device comprising a pool of mercury and a plurality of electrical contacts made of or coated with a non-wettable material such as titanium diboride.

Karnowsky, Maurice M. (Albulquerque, NM); Yost, Frederick G. (Carlsbad, NM)

1987-01-01T23:59:59.000Z

158

Optoelectronic switching of addressable molecular crossbar junctions  

E-Print Network (OSTI)

This letter reports on the observation of optoelectronic switching in addressable molecular crossbar junctions fabricated using polymer stamp-printing method. The active medium in the junction is a molecular self-assembled monolayer softly sandwiched between gold electrodes. The molecular junctions are investigated through currentvoltage measurements at varied temperature (from 95 to 300 K) in high vacuum condition. The junctions show reversible optoelectronic switching with the highest on/off ratio of 3 orders of magnitude at 95 K. The switching behavior is independent of both optical wavelength and molecular structure, while it strongly depends on the temperature. Initial analysis indicates that the distinct binding nature of the molecule/electrode interfaces play a dominant role in the switching performance.

J. C. Li

2006-11-22T23:59:59.000Z

159

Alternative Fuels Data Center: Colonial Williamsburg Switches to  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

Colonial Williamsburg Colonial Williamsburg Switches to Alternative Transportation to someone by E-mail Share Alternative Fuels Data Center: Colonial Williamsburg Switches to Alternative Transportation on Facebook Tweet about Alternative Fuels Data Center: Colonial Williamsburg Switches to Alternative Transportation on Twitter Bookmark Alternative Fuels Data Center: Colonial Williamsburg Switches to Alternative Transportation on Google Bookmark Alternative Fuels Data Center: Colonial Williamsburg Switches to Alternative Transportation on Delicious Rank Alternative Fuels Data Center: Colonial Williamsburg Switches to Alternative Transportation on Digg Find More places to share Alternative Fuels Data Center: Colonial Williamsburg Switches to Alternative Transportation on AddThis.com...

160

Utility-based Bandwidth Adaptation for Multi-Class Traffic QoS Provisioning in Wireless Networks  

E-Print Network (OSTI)

Utility-based Bandwidth Adaptation for Multi-Class Traffic QoS Provisioning in Wireless Networks of ongoing calls to cope with the network resource fluctuations. In this paper, we propose a utility scheme, each call is assigned a utility function and depending on the network load the bandwidth

Haddadi, Hamed

Note: This page contains sample records for the topic "rx bandwidth switch" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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161

Trade & Cap: A customer-managed, market-based system for trading bandwidth allowances at a shared link  

Science Journals Connector (OSTI)

We propose Trade & Cap (T&C), an economics-inspired mechanism that incentivizes users to voluntarily coordinate their consumption of the bandwidth of a shared resource (e.g., a DSLAM link) so as to converge on what they perceive to be an equitable allocation, ... Keywords: Bandwidth management, Incentive mechanisms, Selfish users

Jorge Londoo; Azer Bestavros; Nikolaos Laoutaris

2011-12-01T23:59:59.000Z

162

Video Switching in the Panopto Editor Video Switching in the Panopto Editor  

E-Print Network (OSTI)

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

Benos, Panayiotis "Takis"

163

An evaluation of Access Tier local area network switches.  

SciTech Connect

This reports tabulates the Test and Evaluation results of the Access Class Switch tests conducted by members of Department 9336. About 15 switches were reviewed for use in the enterprise network as access tier switches as defined in a three tier architecture. The Access Switch Tier has several functions including: aggregate customer desktop ports, preserve and apply QoS tags, provide switched LAN access, provide VLAN assignment, as well as others. The typical switch size is 48 or less user ports. The evaluation team reviewed network switch evaluation reports from the Tolly Group as well as other sources. We then used these reports as a starting point to identify particular switches for evaluation. In general we reviewed the products of dominant equipment manufacturers. Also, based on architectural design requirements, the majority of the switches tested were of relatively small monolithic unit variety.

Eldridge, John M.; Olsberg, Ronald R.

2004-06-01T23:59:59.000Z

164

Photonic switching devices based on semiconductor nanostructures  

E-Print Network (OSTI)

Focusing and guiding light into semiconductor nanostructures can deliver revolutionary concepts for photonic devices, which offer a practical pathway towards next-generation power-efficient optical networks. In this review, we consider the prospects for photonic switches using semiconductor quantum dots (QDs) and photonic cavities which possess unique properties based on their low dimensionality. The optical nonlinearity of such photonic switches is theoretically analyzed by introducing the concept of a field enhancement factor. This approach reveals drastic improvement in both power-density and speed, which is able to overcome the limitations that have beset conventional photonic switches for decades. In addition, the overall power consumption is reduced due to the atom-like nature of QDs as well as the nano-scale footprint of photonic cavities. Based on this theoretical perspective, the current state-of-the-art of QD/cavity switches is reviewed in terms of various optical nonlinearity phenomena which have been utilized to demonstrate photonic switching. Emerging techniques, enabled by cavity nonlinear effects such as wavelength tuning, Purcell-factor tuning and plasmonic effects are also discussed.

Chao-Yuan Jin; Osamu Wada

2014-02-26T23:59:59.000Z

165

Increase in IO Bandwidth to Enhance Future Understanding of Climate Change  

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

Increase in IO Increase in IO Bandwidth to Enhance Future Understanding of Climate Change Increase in IO Bandwidth to Enhance Future Understanding of Climate Change August 6, 2009 vorticity+context_2.jpg The large data set sizes generated by the GCRM require new analysis and visualization capabilities with parallel processing and rendering capabilities. This 3d plot of the vorticity isosurfaces was developed using the VisIt visualization tool, a general purpose 3D visualization tool with a parallel distributed architecture, which is being extended to support the geodesic grid used by the GCRM. This work was performed in collaboration with Prabhat at NERSC. Results: Researchers at Pacific Northwest National Laboratory (PNNL)-in collaboration with the National Energy Research Scientific Computing Center

166

'Water window' sources: Selection based on the interplay of spectral properties and multilayer reflection bandwidth  

SciTech Connect

Development of laser-produced plasma 'water window' sources poses a major challenge in x-ray research and most effort has focused on line sources for use with zone plate optics. Here, a comparison of carbon and nitrogen line emission with that from both 3d - 4f and 4d - 4f unresolved transition arrays shows that, at power densities available from 'table-top' solid-state lasers, 3d - 4f emission from zirconium plasmas is most intense, and calculations show that in an imaging system based on multilayer mirrors, for reflectance bandwidths >1% has superior performance than either line or broader-band sources. For bandwidths <1%, line sources are preferable.

Li, Bowen; Dunne, Padraig; O'Sullivan, Gerry [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland)] [School of Physics, University College Dublin, Belfield, Dublin 4 (Ireland); Higashiguchi, Takeshi; Otsuka, Takamitsu [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), and Optical Technology Innovation Center (OpTIC), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan)] [Department of Advanced Interdisciplinary Sciences, Center for Optical Research and Education (CORE), and Optical Technology Innovation Center (OpTIC), Utsunomiya University, Yoto 7-1-2, Utsunomiya, Tochigi 321-8585 (Japan); Jiang, Weihua [Department of Electrical Engineering, Nagaoka University of Technology, Kami-tomiokamachi 1603-1, Nagaoka, Niigata 940-2188 (Japan)] [Department of Electrical Engineering, Nagaoka University of Technology, Kami-tomiokamachi 1603-1, Nagaoka, Niigata 940-2188 (Japan); Endo, Akira [HiLASE Project, Institute of Physics AS, CR, Na Slovance 2, 18221 Prague 8 (Czech Republic)] [HiLASE Project, Institute of Physics AS, CR, Na Slovance 2, 18221 Prague 8 (Czech Republic)

2013-01-28T23:59:59.000Z

167

Mahanaxar: quality of service guarantees in high-bandwidth, real-time streaming data storage  

SciTech Connect

Large radio telescopes, cyber-security systems monitoring real-time network traffic, and others have specialized data storage needs: guaranteed capture of an ultra-high-bandwidth data stream, retention of the data long enough to determine what is 'interesting,' retention of interesting data indefinitely, and concurrent read/write access to determine what data is interesting, without interrupting the ongoing capture of incoming data. Mahanaxar addresses this problem. Mahanaxar guarantees streaming real-time data capture at (nearly) the full rate of the raw device, allows concurrent read and write access to the device on a best-effort basis without interrupting the data capture, and retains data as long as possible given the available storage. It has built in mechanisms for reliability and indexing, can scale to meet arbitrary bandwidth requirements, and handles both small and large data elements equally well. Results from our prototype implementation shows that Mahanaxar provides both better guarantees and better performance than traditional file systems.

Bigelow, David [Los Alamos National Laboratory; Bent, John [Los Alamos National Laboratory; Chen, Hsing - Bung [Los Alamos National Laboratory; Brandt, Scott [UCSC

2010-01-01T23:59:59.000Z

168

Optical memory bandwidth and multiplexing capacity in the erbium telecommunication window  

E-Print Network (OSTI)

We study the bandwidth and multiplexing capacity of an erbium-doped optical memory for quantum storage purposes. We concentrate on the protocol ROSE (Revival of a Silenced Echo) because it has the largest potential multiplexing capacity. Our analysis is applicable to other protocols that involve strong optical excitation. We show that the memory performance is limited by instantaneous spectral diffusion and we describe how this effect can be minimised to achieve optimal performance.

Dajczgewand, Julian; Bttger, Thomas; Louchet-Chauvet, Anne; Gout, Jean-Louis Le; Chanelire, Thierry

2014-01-01T23:59:59.000Z

169

High bandwidth Ge p-i-n photodetector integrated on Si  

SciTech Connect

The authors present a germanium on silicon p-i-n photodiode for vertical light incidence. For a Ge p-i-n photodetector with a radius of 5 {mu}m a 3 dB bandwidth of 25 GHz is measured at an incident wavelength of 1.55 {mu}m and zero external bias. For a modest reverse bias of 2 V, the 3 dB bandwidth increases to 39 GHz. The monolithically integrated devices are grown on Si with solid source molecular beam epitaxy. The complete detector structure consisting of a highly p-doped Ge buried layer, an intrinsic absorption region, and a highly n-doped top contact layer of Ge/Si is grown in one continuous epitaxial run. A low growth temperature sequence was needed to obtain abrupt doping transitions between the highly doped regions surrounding the intrinsic layer. A theoretical consideration of the 3 dB bandwidth of the Ge detector was used to optimize the layer structure. For a photodiode with 5 {mu}m mesa radius the maximum theoretical 3 dB frequency is 62 GHz with an intrinsic region thickness of 307 nm.

Oehme, M.; Werner, J.; Kasper, E.; Jutzi, M.; Berroth, M. [Institut fuer Halbleitertechnik, Universitaet Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart (Germany); Institut fuer Elektrische und Optische Nachrichtentechnik, Universitaet Stuttgart, Pfaffenwaldring 47, 70569 Stuttgart (Germany)

2006-08-14T23:59:59.000Z

170

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

DOE Patents (OSTI)

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).

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

1993-01-19T23:59:59.000Z

171

Explosive-driven, high speed, arcless switch  

DOE Patents (OSTI)

An explosive-actuated, fast-acting arcless switch contains a highly conductive foil to carry high currents positioned adjacent a dielectric surface within a casing. At one side of the foil opposite the dielectric surface is an explosive which, when detonated, drives the conductive foil against the dielectric surface. A pattern of grooves in the dielectric surface ruptures the foil to establish a rupture path having a pattern corresponding to the pattern of the grooves. The impedance of the ruptured foil is greater than that of the original foil to divert high current to a load. Planar and cylindrical embodiments of the switch are disclosed.

Skogmo, P.J.; Tucker, T.J.

1986-05-02T23:59:59.000Z

172

Explosive-driven, high speed, arcless switch  

DOE Patents (OSTI)

An explosive-actuated, fast-acting arcless switch contains a highly conductive foil to carry high currents positioned adjacent a dielectric surface within a casing. At one side of the foil opposite the dielectric surface is an explosive which, when detonated, drives the conductive foil against the dielectric surface. A pattern of grooves in the dielectric surface ruptures the foil to establish a rupture path having a pattern corresponding to the pattern of the grooves. The impedance of the ruptured foil is greater than that of the original foil to divert high current to a load. Planar and cylindrical embodiments of the switch are disclosed. 7 figs.

Skogmo, P.J.; Tucker, T.J.

1987-07-14T23:59:59.000Z

173

The Application of Switched Reluctance Motor in Electric Screw Press  

Science Journals Connector (OSTI)

With computer technology, power electronics, digital control technology, a new type of power system - Switched Reluctance Motor Drives (Switched Reluctance Driver, referred to as SRD) came into being, it is ba...

Zhang Fangyang; Ruan Feng

2011-01-01T23:59:59.000Z

174

Low voltage amplifier architecture for high speed switched capacitor circuits  

E-Print Network (OSTI)

This work concentrates on circuit realization of high speed and low voltage switched capacitor circuits, with emphasis on the operational transconductance amplifier (OTA). An overview of switched capacitor circuits is given. Speed and voltage...

Shankar, Asit

2012-06-07T23:59:59.000Z

175

A preference-based extension for the scalable consensus-based bandwidth allocation protocol in a multicast video conference environment  

E-Print Network (OSTI)

multicast video conferences. SCUBA operates by allocating bandwidth on a particular channel in a multicast conference based on the interest of the users in each transmitting source. PAXLS extends this model to consider the preferences of the users...

Christensen, Eric Joseph

2012-06-07T23:59:59.000Z

176

Optically initiated silicon carbide high voltage switch  

DOE Patents (OSTI)

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.

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

177

Mechanism of Magnetic Relaxation Switching Sensing  

Science Journals Connector (OSTI)

Mechanism of Magnetic Relaxation Switching Sensing ... H.S. acknowledges financial support from the B.S.-Ph.D. National Science Scholarship awarded by the Agency for Science, Technology and Research, Singapore. ... sciences share a common interest in small structures (the definition of 'small' depends on the application, but can range from 1 nm to 1 mm). ...

Changwook Min; Huilin Shao; Monty Liong; Tae-Jong Yoon; Ralph Weissleder; Hakho Lee

2012-07-04T23:59:59.000Z

178

Thermionic converter in load-switching mode  

SciTech Connect

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.

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

1983-01-01T23:59:59.000Z

179

Invertibility of Nonlinear Switched Systems Aneel Tanwani and Daniel Liberzon  

E-Print Network (OSTI)

Invertibility of Nonlinear Switched Systems Aneel Tanwani and Daniel Liberzon Abstract-- This article addresses the invertibility problem for switched nonlinear systems affine in controls. The problem and sufficient condition for a switched system to be invertible, which says that the subsystems should

180

Four Phase Switched Reluctance Motor Direct Torque Control  

Science Journals Connector (OSTI)

The three-phase switched reluctance motor direct torque control method mostly is a simple transplantation of the three-phase AC asynchronous motor direct torque control method, not suitable for arbitrary-phase switched reluctance motor. In this paper, ... Keywords: SRM, Direct torque control, Flux vector, Voltage vector, Switched rule

Wang Mianhua

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "rx bandwidth switch" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


181

E-Print Network 3.0 - artificial molecular switch Sample Search...  

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

variation in which they evade immunity by switching... transmission. mathematical model Typanosoma brucei variant surface glycoprotein switching hierarchy Source: Read,...

182

Non-Thermal X-ray Emission from the Northwestern Rim of the Galactic Supernova Remnant G266.2-1.2 (RX J0852.0-4622)  

E-Print Network (OSTI)

We present a detailed spatially-resolved spectroscopic analysis of two X-ray observations (with a total integration time of 73280 seconds) made of the luminous northwestern rim complex of the Galactic supernova remnant (SNR) G266.2-1.2 (RX J0852.0-4622) with the Chandra X-ray Observatory. G266.2-1.2 is a member of a class of Galactic SNRs which feature X-ray spectra dominated by non-thermal emission: in the cases of these SNRs, the emission is believed to have a synchrotron origin and studies of the X-ray spectra of these SNRs can lend insights into how SNRs accelerate cosmic-ray particles. The Chandra observations have clearly revealed fine structure in this rim complex and the spectra of these features are dominated by non-thermal emission. We have measured the length scales of the upstream structures at eight positions along the rim and derive lengths of 0.02-0.08 pc (assuming a distance of 750 pc to G266.2-1.2). We have also extracted spectra from seven regions in the rim complex and fit these spectra wit...

Pannuti, Thomas G; Filipovic, Miroslav D; De Horta, Ain; Stupar, Milorad; Agrawal, Rashika

2010-01-01T23:59:59.000Z

183

Float level switch for a nuclear power plant containment vessel  

DOE Patents (OSTI)

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.

Powell, James G. (Clifton Park, NY)

1993-01-01T23:59:59.000Z

184

Float level switch for a nuclear power plant containment vessel  

DOE Patents (OSTI)

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.

Powell, J.G.

1993-11-16T23:59:59.000Z

185

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS, VOL. 5, NO. 2, MARCH/APRIL 1999 261 The AMOEBA Switch: An Optoelectronic Switch  

E-Print Network (OSTI)

The AMOEBA Switch: An Optoelectronic Switch for Multiprocessor Networking Using Dense-WDM Ashok V- cessor optoelectronic bit-sliced arrayed (AMOEBA) crossbar switch. The AMOEBA switch addresses directly onto silicon VLSI circuits. Optoelectronic-VLSI technology is used to integrate the switch fabric

Ford, Joseph E.

186

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

SciTech Connect

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.

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

187

Magnetic Switching under Pressure | Advanced Photon Source  

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

Revealing the Secrets of Chemical Bath Deposition Revealing the Secrets of Chemical Bath Deposition DNA Repair Protein Caught in the Act of Molecular Theft Velcro for Nanoparticles A Molecular Fossil Ultrafast Imaging of Electron Waves in Graphene Science Highlights Archives: 2013 | 2012 | 2011 | 2010 2009 | 2008 | 2007 | 2006 2005 | 2004 | 2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Magnetic Switching under Pressure DECEMBER 2, 2010 Bookmark and Share A schematic representation of the pressure-induced magnetic switching effect. The colored images highlight the direction of the magnetic orbital (grey plane) for the copper centers (green balls: copper, blue: nitrogen, red: oxygen/water, yellow: fluoride). A material's properties are a critical factor in the way that material

188

Multiple acousto-optic q-switch  

DOE Patents (OSTI)

An improved dynamic moire interferometer comprised of a lasing medium providing a plurality of beams of coherent light, a multiple q-switch producing multiple trains of 100,000 or more pulses per second, a combining means collimating multiple trains of pulses into substantially a single train and directing beams to specimen gratings affixed to a test material, and a controller, triggering and sequencing the emission of the pulses with the occurrence and recording of a dynamic loading event.

Deason, Vance A. (Idaho Falls, ID)

1993-01-01T23:59:59.000Z

189

Gas mixture for diffuse-discharge switch  

DOE Patents (OSTI)

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.

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

1982-08-31T23:59:59.000Z

190

Piezoelectric buckling actuators : form reduction, bidirectional control, and optimal switching  

E-Print Network (OSTI)

Piezoelectric stack actuators are generally described as having large force density, high bandwidth response, and limited yet precise displacement properties. As a result, these actuators have been widely applied to precision ...

Pealver-guila, Llus Enric

2014-01-01T23:59:59.000Z

191

An investigation of irregular switching in three phase adjustable speed motor drives without neutral connection  

E-Print Network (OSTI)

Phase Model 9 One Cycle of Reference Current 17 10 Effect of Magnitude of E on Current Slope 18 11 Effect of Back EMF on Switching with Zero Degree Phase difference with Reference Current . 19 12 Effect of Back EMF on Switching with Ninety Degree... Phase Switching with Unacceptable Phase Inductance 37 25 Three Phase Switching with unacceptable Back EMF 38 26 Circuit Configuration during iVull Switching States 41 27 Three Phase Switching without Null Switching State . 47 CHAPTER I INTRODUCTION...

Arefeen, Shamsal

2012-06-07T23:59:59.000Z

192

Switch Switch  

NLE Websites -- All DOE Office Websites (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...

193

Direct bandwidth and polarization control of an XEF unstable resonator laser  

SciTech Connect

Several approaches to directly controlling the bandwidth and polarization of an unstable resonator without the use of an injection source have been tested. The techniques are based on the control of oscillations within (and around) the resonator core through the use of small, subaperture optical elements (e.g., etalons, Brewster-angle plates, Glan-air prisms) mounted at select locations within the system. The experiments were formed on a 4 J, e-beam pumped, XeF (B..-->..X) laser operating at ambient temperature, with output predominantly at 353.2 nm. A spectral linewidth of less than 12 GHz (0.05 A) and nearly perfect linear polarization were simultaneously achieved at high laser efficiency. Oscillation on a single, dominant transverse mode has been demonstrated. The increased cost and complexity of injection controlled systems are avoided through the use of these direct, core control approaches.

Litzenberger, L.N.; Smith, M.J. (Avco Research Lab., Inc., Everett, MA (US))

1988-11-01T23:59:59.000Z

194

Bandwidth broadening and asymmetric softening of collective spin waves in magnonic crystals  

SciTech Connect

We investigate the dependence on the applied field of the frequency/wavevector dispersion relations of collective spin waves in arrays of dots, close to a magnetic transition. In particular, we focus on the low frequency soft modes in three different cases: end modes in the transition between two different saturated states in ellipses, fundamental mode in the saturated-to-vortex transition in disks, and gyrotropic mode in the vortex-to-saturated transition in disks. Noteworthy, the spin waves with nonzero Bloch wavevector along the direction of the applied field happen to soften earlier than spin waves with a Bloch wavevector along different directions, and this feature is responsible for an asymmetric broadening of the bandwidth along the different lattice directions. This is particularly useful in magnonic/spin-logic device research, if different binary digits are associated to modes with the same cell function but different propagation directions.

Montoncello, F., E-mail: montoncello@fe.infn.it; Giovannini, L. [Dipartimento di Fisica e Scienze della Terra, CNISM-University of Ferrara, Ferrara, Emilia-Romagna I-44100 (Italy)

2014-06-16T23:59:59.000Z

195

Spectrum bandwidth narrowing of Thomson scattering X-rays with energy chirped electron beams from laser wakefield acceleration  

SciTech Connect

We study incoherent Thomson scattering between an ultrashort laser pulse and an electron beam accelerated from a laser wakefield. The energy chirp effects of the accelerated electron beam on the final radiation spectrum bandwidth are investigated. It is found that the scattered X-ray radiation has the minimum spectrum width and highest intensity as electrons are accelerated up to around the dephasing point. Furthermore, it is proposed that the electron acceleration process inside the wakefield can be studied by use of 90 Thomson scattering. The dephasing position and beam energy chirp can be deduced from the intensity and bandwidth of the scattered radiation.

Xu, Tong; Chen, Min, E-mail: minchen@sjtu.edu.cn; Li, Fei-Yu; Yu, Lu-Le [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China)] [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Sheng, Zheng-Ming, E-mail: zmsheng@sjtu.edu.cn [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China) [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); SUPA, Department of Physics, University of Strathclyde, Glasgow G4 0NG (United Kingdom); Zhang, Jie [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China) [Key Laboratory for Laser Plasmas (Ministry of Education), Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240 (China); Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China)

2014-01-06T23:59:59.000Z

196

Tri-material multilayer coatings with high reflectivity and wide bandwidth for 25 to 50 nm extreme ultraviolet light  

SciTech Connect

Magnesium/silicon carbide (Mg/SiC) multilayers have been fabricated with normal incidence reflectivity in the vicinity of 40% to 50% for wavelengths in the 25 to 50 nm wavelength range. However many applications, for example solar telescopes and ultrafast studies using high harmonic generation sources, desire larger bandwidths than provided by high reflectivity Mg/SiC multilayers. We investigate introducing a third material, Scandium, to create a tri-material Mg/Sc/SiC multilayer allowing an increase the bandwidth while maintaining high reflectivity.

Aquila, Andrew; Salmassi, Farhad; Liu, Yanwei; Gullikson, Eric M.

2009-09-09T23:59:59.000Z

197

An Adaptive Memory Interface Controller for Improving Bandwidth Utilization of Hybrid and Reconfigurable Systems  

SciTech Connect

Emerging applications such as data mining, bioinformatics, knowledge discovery, social network analysis are irregular. They use data structures based on pointers or linked lists, such as graphs, unbalanced trees or unstructures grids, which generates unpredictable memory accesses. These data structures usually are large, but difficult to partition. These applications mostly are memory bandwidth bounded and have high synchronization intensity. However, they also have large amounts of inherent dynamic parallelism, because they potentially perform a task for each one of the element they are exploring. Several efforts are looking at accelerating these applications on hybrid architectures, which integrate general purpose processors with reconfigurable devices. Some solutions, which demonstrated significant speedups, include custom-hand tuned accelerators or even full processor architectures on the reconfigurable logic. In this paper we present an approach for the automatic synthesis of accelerators from C, targeted at irregular applications. In contrast to typical High Level Synthesis paradigms, which construct a centralized Finite State Machine, our approach generates dynamically scheduled hardware components. While parallelism exploitation in typical HLS-generated accelerators is usually bound within a single execution flow, our solution allows concurrently running multiple execution flow, thus also exploiting the coarser grain task parallelism of irregular applications. Our approach supports multiple, multi-ported and distributed memories, and atomic memory operations. Its main objective is parallelizing as many memory operations as possible, independently from their execution time, to maximize the memory bandwidth utilization. This significantly differs from current HLS flows, which usually consider a single memory port and require precise scheduling of memory operations. A key innovation of our approach is the generation of a memory interface controller, which dynamically maps concurrent memory accesses to multiple ports. We present a case study on a typical irregular kernel, Graph Breadth First search (BFS), exploring different tradeoffs in terms of parallelism and number of memories.

Castellana, Vito G.; Tumeo, Antonino; Ferrandi, Fabrizio

2014-05-30T23:59:59.000Z

198

Modeling Combustion Control for High Power Diesel Mode Switching  

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

and Emissions Research Conference 2010 Modeling Combustion Control for High Power Diesel Mode Switching P-20 Motivation * High power LTC-diesel mode operation * Transient...

199

A New Class of Switched Reluctance Motors without Permanent Magnets...  

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

A New Class of Switched Reluctance Motors without Permanent Magnets A Segmented Drive Inverter Topology with a Small DC Bus Capacitor A Segmented Drive Inverter Topology with a...

200

Commute Mode Switching Impact Tool | Department of Energy  

Office of Environmental Management (EM)

Xcel worksheet describes the example data from the Commute Mode Switching Impact Tool. ghgcommutetool.xlsx More Documents & Publications Refrigerators and Refrigerator-Freezers...

Note: This page contains sample records for the topic "rx bandwidth switch" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
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to obtain the most current and comprehensive results.


201

Intelligent design of sensorless Switched reluctance motor drives; -.  

E-Print Network (OSTI)

??The Switched Reluctance Motor SRM drive technology has gone newlinethrough steady and significant development over the last two decades The newlinesimplicity in both motor construction (more)

Marsaline Beno, M

2014-01-01T23:59:59.000Z

202

Get Current: Switch on Clean Energy Coloring Book | Department...  

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

Coloring book of energy efficiency and renewable energy technologies for kids. coloringbook2010.pdf More Documents & Publications Get Current: Switch on Clean Energy Coloring Book...

203

Q switching by self-focusing  

SciTech Connect

A novel passive technique for obtaining short-laser-pulse emission is presented. A cell with a high-second-order refractive-index liquid is included in an unstable laser cavity. The external self-focusing introduced by the cell at higher optical intensities reduces the diffraction losses, producing modulation of the gain and Q switching of the cavity. Compared with saturable absorbers, this method provides better mode quality, avoids filamentary emission, and is not restricted in wavelength. Experimental results are presented that are in good agreement with the numerical model developed.

Marconi, M.C.; Martinez, O.E.; Diodati, F.P.

1985-08-01T23:59:59.000Z

204

Switching surface chemistry with supramolecular machines.  

SciTech Connect

Tethered supramolecular machines represent a new class of active self-assembled monolayers in which molecular configurations can be reversibly programmed using electrochemical stimuli. We are using these machines to address the chemistry of substrate surfaces for integrated microfluidic systems. Interactions between the tethered tetracationic cyclophane host cyclobis(paraquat-p-phenylene) and dissolved {pi}-electron-rich guest molecules, such as tetrathiafulvalene, have been reversibly switched by oxidative electrochemistry. The results demonstrate that surface-bound supramolecular machines can be programmed to adsorb or release appropriately designed solution species for manipulating surface chemistry.

Dunbar, Timothy D.; Kelly, Michael James; Jeppesen, Jan O. (University of California, Los Angeles, CA); Bunker, Bruce Conrad; Matzke, Carolyn M.; Stoddart, J. Fraser; Huber, Dale L.; Kushmerick, James G.; Flood, Amar H. (University of California, Los Angeles, CA); Perkins, Julie (University of California, Los Angeles, CA); Cao, Jianguo (University of California, Los Angeles, CA)

2005-07-01T23:59:59.000Z

205

Fuel Switching Strategies for the 1990s  

E-Print Network (OSTI)

, 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...

Cascone, R.

206

Bandwidth-aware Co-allocating Meta-schedulers for Mini-grid Architectures William M. Jones  

E-Print Network (OSTI)

Bandwidth-aware Co-allocating Meta-schedulers for Mini-grid Architectures William M. Jones Louis W resource collections naturally lends itself to the formation of a mini-grid. A mini-grid is distinguished from a traditional compu- tational grid in that the mini-grid utilizes a dedicated inter- connection

Jones, William Michael

207

On-Chip Copper-Based vs. Optical Interconnects: Delay Uncertainty, Latency, Power, and Bandwidth Density Comparative Predictions  

E-Print Network (OSTI)

On-Chip Copper-Based vs. Optical Interconnects: Delay Uncertainty, Latency, Power, and Bandwidth. Albonesi, Philippe M. Fauchet, and Eby G. Friedman Department of Electrical and Computer Engineering of Rochester, Rochester, New York, 14627 Department of Electrical and Computer Engineering,Cornell University

Friedman, Eby G.

208

A Bandwidth-Based Power-Aware Routing Protocol with Low Route Discovery Overhead in Mobile Ad hoc Networks  

Science Journals Connector (OSTI)

......protocol, where the power consumed by listening to the transmission of a packet is represented...equipped with the IEEE 802.11b wireless device. Measuring the distance-to-bandwidth...equipped with the IEEE 802.11b wireless device. However, if a specific distance is......

Chuan-Chi Weng; Ching-Wen Chen; Chang-Jung Ku; Shiow-Fen Hwang

2010-09-01T23:59:59.000Z

209

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 5, NO. 4, APRIL 2006 1 Energy-Efficient Bandwidth Allocation in Wireless  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 5, NO. 4, APRIL 2006 1 Energy transactions, has motivated the research in supporting quality of service (QoS) with energy conservation, and Arne A. Nilsson Abstract-- In this paper, we present a new energy-efficient bandwidth allocation scheme

Wang, Wenye

210

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 5, NO. 5, MAY 2006 1103 Energy-Efficient Bandwidth Allocation in Wireless  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 5, NO. 5, MAY 2006 1103 Energy transactions, has motivated the research in supporting quality of service (QoS) with energy conservation, and Arne A. Nilsson Abstract-- In this paper, we present a new energy-efficient bandwidth allocation scheme

Wang, Xinbing

211

1998 SPIE Smart Structures and Materials Conf. Paper #332919/332742 High bandwidth tunability in a smart vibration absorber  

E-Print Network (OSTI)

in a smart vibration absorber Alison B. Flatau, + Marcelo J. Dapino ++ and Frederick T. Calkins Terfenol­D vibration absorber is developed in this paper. An overview of magnetostriction including to achieve high bandwidth tunability in the performance of a Terfenol­D vibration absorber. Keywords

Flatau, Alison B.

212

Investigation of Flux Linkage Profile Measurement Methods for Switched Reluctance Motors and Permanent Magnet  

E-Print Network (OSTI)

- 1 - Investigation of Flux Linkage Profile Measurement Methods for Switched Reluctance Motors for switched reluctance motors (SRM's) and permanent magnet motors (PMM's). Various measurement methods have reluctance motors, permanent magnet motors. I. INTRODUCTION Switched Reluctance Motors (SRM's) have very

Lu, Kaiyuan

213

A comparator-based switched-capacitor pipelined analog-to-digital converter  

E-Print Network (OSTI)

A new comparator-based switched-capacitor(CBSC) technique is proposed that eliminates the need for high gain op-amps in switched-capacitor circuits. The CBSC technique replaces the op-amp in switched-capacitor circuits ...

Fiorenza, John Kenneth, 1977-

2007-01-01T23:59:59.000Z

214

Pulse and Hold Switching Current Readout of Superconducting Quantum Circuits  

E-Print Network (OSTI)

;#12;Abstract Josephson junction qubits are promising candidates for a scalable quantum processor. Such qubits on the switching of a Josephson junction from the zero voltage state to a finite voltage state. The Josephson a switching current detector by analyzing the phase space of a Josephson junction circuit with frequency

Haviland, David

215

Hybrid Dynamical Systems, or HDS: The Ultimate Switching Experience  

E-Print Network (OSTI)

Hybrid Dynamical Systems, or HDS: The Ultimate Switching Experience Michael S. Branicky Laboratory concentrated on formalizing the notion of a hybrid system as switching among an indexed collection of dynamical give a quick overview of the area of hybrid systems. I also briefly review the formal definition

Branicky, Michael S.

216

A Software Engineering Framework for Switched Fuzzy Systems  

E-Print Network (OSTI)

of switched fuzzy systems, in which the discrete characteristics of the mode-switching logic are implemented the intuitive nature of fuzzy logic. Our approach is backed by a Java package that provides an initial that this approach is useful as a tool for the natural development of control systems. Specifically, fuzzy set theory

Weiss, Gera

217

Stator Vibration Analysis of Bearingless Switched Reluctance Motors  

Science Journals Connector (OSTI)

Radial magnetic force acts on the motor stator cause large vibration and acoustic noise, that have limit the application of switched reluctance motors (SRMs). They can be aggravated when there is unbalanced force due to rotor eccentricity. This paper ... Keywords: switched reluctance motors, bearingless technique, vibration, magnetic fore, mathematic model

Yang Yan; Deng Zhiquan; Zhang Qianying; Wang Xiaolin

2010-06-01T23:59:59.000Z

218

Electro-Tactile Display with Localized High-Speed Switching  

E-Print Network (OSTI)

-speed switching December 4-6, Tokyo, JAPAN ICAT 2002 #12;determined, and the type of stimulation, anodic stimulation or cathodic one, is selected. If the anodic stimulation is chosen, the upper switch which leads simultaneously uses only two electrodes: anode and cathode. These dipoles are scanned around the stimulation

Tachi, Susumu

219

Definition: Automated Feeder And Line Switching | Open Energy Information  

Open Energy Info (EERE)

Definition Definition Edit with form History Facebook icon Twitter icon » Definition: Automated Feeder And Line Switching Jump to: navigation, search Dictionary.png Automated Feeder And Line Switching Automated feeder and line switching is realized through automatic isolation and reconfiguration of faulted segments of distribution feeders or transmission lines via sensors, controls, switches, and communications systems. These devices can operate autonomously in response to local events or in response to signals from a central control system.[1] Related Terms transmission lines, transmission line References ↑ SmartGrid.gov 'Description of Functions' An i LikeLike UnlikeLike You like this.Sign Up to see what your friends like. nline Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Automated_Feeder_And_Line_Switching&oldid=480562"

220

Sensor Switch's Bright Manufacturing Future | Department of Energy  

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

Sensor Switch's Bright Manufacturing Future Sensor Switch's Bright Manufacturing Future Sensor Switch's Bright Manufacturing Future June 16, 2010 - 12:01pm Addthis Lindsay Gsell It's a simple concept that's saving thousands of dollars in utility bills each year: when a room is empty, turn off the lights. This is the basic concept behind Sensor Switch, a Connecticut-based manufacturer of lighting control products. Sensor Switch's occupancy sensor devices turn off lights when spaces are vacant. They also make devices that dim or turn off lights when sufficient daylight is present. Both types of products provide cost effective energy savings in indoor spaces like office buildings and warehouses. "There's an increasing public demand to save energy, which directly impacts the demand for our products," said Ben Hahn, vice president. "A key part of

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


221

776 IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, VOL. 34, NO. 4, JULY/AUGUST 1998 Switched Reluctance Motor Modeling with  

E-Print Network (OSTI)

-line parameter estimation using recursive identification for switched reluctance motors (SRM's) is presented. Index Terms-- Parameter identification, switched reluctance motor modeling, switched reluctance motors. I. INTRODUCTION THE switched reluctance motor (SRM) is a simple, low- cost, and robust motor

Husain, Iqbal

222

Reversible Switching of an Optical Gate Using Phase-Change Material and Si Waveguide  

Science Journals Connector (OSTI)

Optical gate switch that uses Ge2Sb2Te5phase-change material was fabricated and the reversible switching has been...

Ikuma, Yuichiro; Shoji, Yuya; Kuwahara, Masashi; Wang, Xiaomin; Kintaka, Kenji; Kawashima, Hitoshi; Tanaka, Daiki; Tsuda, Hiroyuki

223

E-Print Network 3.0 - automotive switch-mode audio Sample Search...  

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

advantages and problems when implementing direct energy conversion switching-mode audio power... on a direct-conversion switching-mode audio power ampli- ... Source: Ris National...

224

E-Print Network 3.0 - activation switch macs-index Sample Search...  

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

Optical Summary: quadratically with switching node degree when active optoelectronic devices are used as switching elements 2... is presented. Because of the high cost of...

225

E-Print Network 3.0 - ab switched current Sample Search Results  

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

Engineering 16 Switch Detection in Genetic Regulatory Riccardo Porreca1 Summary: CRP, Fis, GyrAB, and stable RNAs. Vertical lines denote detected switches, while crosses...

226

Ultrafast all?optical switching in a dual?core fiber nonlinear coupler  

Science Journals Connector (OSTI)

We report the first demonstration of a nonlinear coupler switch capable of substantially complete all?optical switching at subpicosecond rates with no light?induced thermal effects.

S. R. Friberg; Y. Silberberg; M. K. Oliver; M. J. Andrejco; M. A. Saifi; P. W. Smith

1987-01-01T23:59:59.000Z

227

E-Print Network 3.0 - assisted auxiliary switch Sample Search...  

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

quasiresonant tank soft- switching inverter," in Proc. IEEE Ind... IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 19, NO. 2, MARCH 2004 363 A Passive Soft-Switching... for...

228

A phenomenological multi-axial constitutive law for switching in polycrystalline ferroelectric ceramics  

E-Print Network (OSTI)

A phenomenological multi-axial constitutive law for switching in polycrystalline ferroelectric; accepted 30 January 2002 Abstract A phenomenological constitutive law for ferroelectric switching due

229

White Flame Energy switches to backhoes  

SciTech Connect

The mountaintop coal operator, White Flame Energy has switched to different truck-shovel arrangement. Along with many surface mining operations throughout central Appalachia, the company is using hoe-configured hydraulic excavators as opposed to the traditional front-shovel arrangements. Located in Varney, WV, White Flame Energy uses two Terex O & K mining shovels, an RH170 and an RH 200, which have the capacity to move 2 million cu yards per month from five seams, primarily the Coalburg, Stockton, and No 5 Block and associated rider seams. The article records conversations on the operations with Mike Vines, the general manager, and Don Nicewonder, the owner of White Flame Energy. 2 photos.

Fiscor, S.

2005-06-01T23:59:59.000Z

230

High voltage photo switch package module  

DOE Patents (OSTI)

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.

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

2014-02-18T23:59:59.000Z

231

Method and apparatus for providing high bandwidth, low noise mechanical I/O for computer systems  

DOE Patents (OSTI)

A method and apparatus for providing high bandwidth and low noise mechanical input and output for computer systems. A gimbal mechanism provides two revolute degrees of freedom to an object about two axes of rotation. A linear axis member is coupled to the gimbal mechanism at the intersection of the two axes of rotation. The linear axis member is capable of being translated along a third axis to provide a third degree of freedom. The user object is coupled to the linear axis member and is thus translatable along the third axis so that the object can be moved along all three degrees of freedom. Transducers associated with the provided degrees of freedom include sensors and actuators and provide an electromechanical interface between the object and a digital processing system. Capstan drive mechanisms transmit forces between the transducers and the object. The linear axis member can also be rotated about its lengthwise axis to provide a fourth degree of freedom, and, optionally, a floating gimbal mechanism is coupled to the linear axis member to provide fifth and sixth degrees of freedom to an object. Transducer sensors are associated with the fourth, fifth, and sixth degrees of freedom. The interface is well suited for simulations of medical procedures and simulations in which an object such as a stylus or a joystick is moved and manipulated by the user.

Rosenberg, Louis B. (Pleasanton, CA)

1998-01-01T23:59:59.000Z

232

Argonne CNM Highlight: Reverse Chemical Switching of a Ferroelectric Film  

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

Reverse Chemical Switching of a Ferroelectric Film Reverse Chemical Switching of a Ferroelectric Film Reverse Chemmical Switching of a Ferroelectric Film Ferroelectric materials display a spontaneous electric polarization below the Curie temperature that can be reoriented, typically by applying an electric field. In this study, researchers from Argonne, Northern Illinois University, and The University of Pennsylvania have demonstrated that the chemical environment can control the polarization orientation in an ultrathin ferroelectric film. This is complementary to recent predictions that polarization can affect surface chemistry and illuminates potential applications in sublithographic patterning and electrically tunable catalysts. In situ synchrotron X-ray scattering measurements showed that high or low

233

Photo-induced micro-mechanical optical switch  

DOE Patents (OSTI)

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.

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

2002-01-01T23:59:59.000Z

234

Effect of laser spectral bandwidth on coherent control of resonance-enhanced multiphoton-ionization photoelectron spectroscopy  

SciTech Connect

The high-resolution (2 + 1) resonance-enhanced multiphoton-ionization photoelectron spectroscopy (REMPI-PS) can be obtained by measuring the photoelectron intensity at a given kinetic energy and scanning the single ? phase step position. In this paper, we further demonstrate that the high-resolution (2 + 1) REMPI-PS cannot be achieved at any measured position of the kinetic energy by this measurement method, which is affected by the laser spectral bandwidth. We propose a double ? phase step modulation to eliminate the effect of the laser spectral bandwidth, and show the advantage of the double ? phase step modulation on achieving the high-resolution (2 + 1) REMPI-PS by considering the contributions involving on- and near-resonant three-photon excitation pathways.

Xu, Shuwu [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China) [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China); School of Science, Nantong University, Nantong 226007 (China); Ding, Jingxin, E-mail: jxding@phy.ecnu.edu.cn; Lu, Chenhui; Jia, Tianqing; Zhang, Shian, E-mail: sazhang@phy.ecnu.edu.cn; Sun, Zhenrong [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China)] [State Key Laboratory of Precision Spectroscopy, and Department of Physics, East China Normal University, Shanghai 200062 (China)

2014-02-28T23:59:59.000Z

235

Final Report on DOE Project entitled Dynamic Optimized Advanced Scheduling of Bandwidth Demands for Large-Scale Science Applications  

SciTech Connect

In this project, developed scheduling frameworks for dynamic bandwidth demands for large-scale science applications. In particular, we developed scheduling algorithms for dynamic bandwidth demands in this project. Apart from theoretical approaches such as Integer Linear Programming, Tabu Search and Genetic Algorithm heuristics, we have utilized practical data from ESnet OSCARS project (from our DOE lab partners) to conduct realistic simulations of our approaches. We have disseminated our work through conference paper presentations and journal papers and a book chapter. In this project we addressed the problem of scheduling of lightpaths over optical wavelength division multiplexed (WDM) networks. We published several conference papers and journal papers on this topic. We also addressed the problems of joint allocation of computing, storage and networking resources in Grid/Cloud networks and proposed energy-efficient mechanisms for operatin optical WDM networks.

Ramamurthy, Byravamurthy [University of Nebraska-Lincoln

2014-05-05T23:59:59.000Z

236

Design, analysis and testing of a parallel-kinematic high-bandwidth XY nanopositioning stage  

SciTech Connect

This paper presents the design, analysis, and testing of a parallel-kinematic high-bandwidth XY nanopositioning stage driven by piezoelectric stack actuators. The stage is designed with two kinematic chains. In each kinematic chain, the end-effector of the stage is connected to the base by two symmetrically distributed flexure modules, respectively. Each flexure module comprises a fixed-fixed beam and a parallelogram flexure serving as two orthogonal prismatic joints. With the purpose to achieve high resonance frequencies of the stage, a novel center-thickened beam which has large stiffness is proposed to act as the fixed-fixed beam. The center-thickened beam also contributes to reducing cross-coupling and restricting parasitic motion. To decouple the motion in two axes totally, a symmetric configuration is adopted for the parallelogram flexures. Based on the analytical models established in static and dynamic analysis, the dimensions of the stage are optimized in order to maximize the first resonance frequency. Then finite element analysis is utilized to validate the design and a prototype of the stage is fabricated for performance tests. According to the results of static and dynamic tests, the resonance frequencies of the developed stage are over 13.6 kHz and the workspace is 11.2??m 11.6??m with the cross-coupling between two axes less than 0.52%. It is clearly demonstrated that the developed stage has high resonance frequencies, a relatively large travel range, and nearly decoupled performance between two axes. For high-speed tracking performance tests, an inversion-based feedforward controller is implemented for the stage to compensate for the positioning errors caused by mechanical vibration. The experimental results show that good tracking performance at high speed is achieved, which validates the effectiveness of the developed stage.

Li, Chun-Xia; Gu, Guo-Ying; Yang, Mei-Ju; Zhu, Li-Min, E-mail: zhulm@sjtu.edu.cn [State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China)] [State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China)

2013-12-15T23:59:59.000Z

237

On Approaching the Ultimate Limits of Photon-Efficient and Bandwidth-Efficient Optical Communication  

E-Print Network (OSTI)

It is well known that ideal free-space optical communication at the quantum limit can have unbounded photon information efficiency (PIE), measured in bits per photon. High PIE comes at a price of low dimensional information efficiency (DIE), measured in bits per spatio-temporal-polarization mode. If only temporal modes are used, then DIE translates directly to bandwidth efficiency. In this paper, the DIE vs. PIE tradeoffs for known modulations and receiver structures are compared to the ultimate quantum limit, and analytic approximations are found in the limit of high PIE. This analysis shows that known structures fall short of the maximum attainable DIE by a factor that increases linearly with PIE for high PIE. The capacity of the Dolinar receiver is derived for binary coherent-state modulations and computed for the case of on-off keying (OOK). The DIE vs. PIE tradeoff for this case is improved only slightly compared to OOK with photon counting. An adaptive rule is derived for an additive local oscillator that maximizes the mutual information between a receiver and a transmitter that selects from a set of coherent states. For binary phase-shift keying (BPSK), this is shown to be equivalent to the operation of the Dolinar receiver. The Dolinar receiver is extended to make adaptive measurements on a coded sequence of coherent state symbols. Information from previous measurements is used to adjust the a priori probabilities of the next symbols. The adaptive Dolinar receiver does not improve the DIE vs. PIE tradeoff compared to independent transmission and Dolinar reception of each symbol.

Sam Dolinar; Kevin M. Birnbaum; Baris I. Erkmen; Bruce Moision

2011-04-13T23:59:59.000Z

238

A novel rotor position estimation approach for an 8/6 solid rotor switched reluctance motor  

Science Journals Connector (OSTI)

Switched reluctance motor (SRM) is becoming popular due to its simple construction, low manufacturing cost, ruggedness and fault-tolerant capability. In conventional switched reluctance motor (SRM), rotor is laminated. But in solid rotor switched reluctance ... Keywords: Artificial neural network, Rotor position estimation, Solid rotor switched reluctance motor, Two-phase excitation

L. Jessi Sahaya Shanthi; R. Arumugam; Y. K. Taly

2012-04-01T23:59:59.000Z

239

Control of a Linear Switched Reluctance Motor as a Propulsion System for Autonomous Railway Vehicles  

E-Print Network (OSTI)

Control of a Linear Switched Reluctance Motor as a Propulsion System for Autonomous Railway) and the linear switched reluctance motor (LSRM). Switched reluctance motors generally offer a very simple issue with the switched reluctance motors is the highly nonlinear magnetisation characteristic

Paderborn, Universität

240

Microsoft Word - CX-Hat_Rock_Switch_14June2013  

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

7, 2013 7, 2013 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Glenn Russell Project Manager -TPCV-TPP-4 Proposed Action: Hat Rock Switching Station Replacement Project Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Umatilla County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to fund PacifiCorp's rebuild of BPA's Hat Rock Tap Switching Station, which is located within PacifiCorp's McNary-Wallula 230-kilovolt (kV) transmission line right-of-way (ROW). Rebuilding the switching station would include the replacement of sectionalizing switches, the grounding grid, and all signage. The approximately 0.5-acre yard would

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


241

Electro-mechanical heat switch for cryogenic applications  

DOE Patents (OSTI)

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.

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

2003-01-01T23:59:59.000Z

242

Throughput-cost analysis of optical flow switching  

E-Print Network (OSTI)

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.

Chan, Vincent W. S.

243

A Novel Fuzzy Controller for Switched Reluctance Motor Drive  

Science Journals Connector (OSTI)

There are serious nonlinear, variable strongly coupling characteristic in switched reluctance motor (SRM),and its electromagnetic relationship is hard to analyze. According to the nonlinear inductance model of SRM,a control system for SRM is carried ...

Yiwang Wang

2009-05-01T23:59:59.000Z

244

Model predictive torque control of a Switched Reluctance Motor  

Science Journals Connector (OSTI)

The strongly nonlinear magnetic characteristic of Switched Reluctance Motors (SRMs) makes their torque control a challenging task. In contrast to standard current-based control schemes, we use Model Predictive Control (MPC) and directly manipulate the ...

Helfried Peyrl; Georgios Papafotiou; Manfred Morari

2009-02-01T23:59:59.000Z

245

Fault current limiter based on triggered vacuum switch  

Science Journals Connector (OSTI)

A new type of fault current limiter (FCL) based on triggered vacuum switch ... is mainly composed of a capacitor, a current-limiting reactor connected with a capacitor in ... behaves as a conventional series comp...

Jing Shi; Ji-yan Zou; Jun-jia He

2000-12-01T23:59:59.000Z

246

Integrated optical switching using titanium nitride micro electromechanical systems  

E-Print Network (OSTI)

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 ...

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

2006-01-01T23:59:59.000Z

247

Throughput-Cost Analysis of Optical Flow Switching  

Science Journals Connector (OSTI)

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...

Weichenberg, Guy; Chan, Vincent W; Swanson, Eric A; Mdard, Muriel

248

Graphene passively Q-switched two-micron fiber lasers  

Science Journals Connector (OSTI)

We demonstrate a passively Q-switched thulium fiber laser, using a graphene-based saturable absorber. The laser is based on an all-fiber ring cavity and produces ~2.3?s pulses at...

Wang, Fengqiu; Torrisi, Felice; Jiang, Zhe; Popa, Daniel; Hasan, Tawfique; Sun, Zhipei; Cho, Wonbae; Ferrari, Andrea C

249

Combining Genetic Oscillators and Switches using Evolutionary Algorithms  

E-Print Network (OSTI)

motifs, one toggle switch and one self- sustained oscillator using an evolutionary algorithm, which can]. Of particular interest in biology are those network motifs that produce self-sustained oscillations and bistable

Jin, Yaochu

250

All graphene electromechanical switch fabricated by chemical vapor deposition  

E-Print Network (OSTI)

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 ...

Milaninia, Kaveh M.

251

Get Current: Switch on Clean Energy Activity Book  

K-12 Energy Lesson Plans and Activities Web site (EERE)

Switching on clean energy technologies means strengthening the economy while protecting the environment. This activity book for all ages promotes energy awareness, with facts on different types of energy and a variety of puzzles in an energy theme.

252

Random switching exponential smoothing and inventory forecasting  

Science Journals Connector (OSTI)

Abstract Exponential smoothing models represent an important prediction tool both in business and in macroeconomics. This paper provides the analytical forecasting properties of the random coefficient exponential smoothing model in the multiple source of error framework. The random coefficient state-space representation allows for switching between simple exponential smoothing and local linear trend. Therefore it enables controlling, in a flexible manner, the random changing dynamic behavior of the time series. The paper establishes the algebraic mapping between the state-space parameters and the implied reduced form ARIMA parameters. In addition, it shows that the parametric mapping allows overcoming the difficulties that are likely to emerge in estimating directly the random coefficient state-space model. Finally, it presents an empirical application comparing the forecast accuracy of the suggested model vis--vis other benchmark models, both in the ARIMA and in the exponential smoothing class. Using time series relative to wholesalers inventories in the USA, the out-of-sample results show that the reduced form of the random coefficient exponential smoothing model tends to be superior to its competitors.

Giacomo Sbrana; Andrea Silvestrini

2014-01-01T23:59:59.000Z

253

Spark gap device for precise switching  

DOE Patents (OSTI)

A spark gap device for precise switching of an energy storage capacitor into an exploding bridge wire load is disclosed. Niobium electrodes having a melting point of 2,415 degrees centrigrade are spaced apart by an insulating cylinder to define a spark gap. The electrodes are supported by conductive end caps which, together with the insulating cylinder, form a hermetically sealed chamber filled with an inert, ionizable gas, such as pure xenon. A quantity of solid radioactive carbon-14 within the chamber adjacent the spark gap serves as a radiation stabilizer. The sides of the electrodes and the inner wall of the insulating cylinder are spaced apart a sufficient distance to prevent unwanted breakdown initiation. A conductive sleeve may envelop the outside of the insulating member from the midpoint of the spark gap to the cap adjacent the cathode. The outer metallic surfaces of the device may be coated with a hydrogen-impermeable coating to lengthen the shelf life and operating life of the device. The device breaks down at about 1,700 volts for input voltage rates up to 570 volts/millisecond and allows peak discharge currents of up to 3,000 amperes from a 0.3 microfarad energy storage capacitor for more than 1,000 operations.

Boettcher, Gordon E. (Albuquerque, NM)

1984-01-01T23:59:59.000Z

254

Spark gap device for precise switching  

DOE Patents (OSTI)

A spark gap device for precise switching of an energy storage capacitor into an exploding bridge wire load is disclosed. Niobium electrodes having a melting point of 2,415 degrees centigrade are spaced apart by an insulating cylinder to define a spark gap. The electrodes are supported by conductive end caps which, together with the insulating cylinder, form a hermetically sealed chamber filled with an inert, ionizable gas, such as pure xenon. A quantity of solid radioactive carbon-14 within the chamber adjacent the spark gap serves as a radiation stabilizer. The sides of the electrodes and the inner wall of the insulating cylinder are spaced apart a sufficient distance to prevent unwanted breakdown initiation. A conductive sleeve may envelop the outside of the insulating member from the midpoint of the spark gap to the cap adjacent the cathode. The outer metallic surfaces of the device may be coated with a hydrogen-impermeable coating to lengthen the shelf life and operating life of the device. The device breaks down at about 1,700 volts for input voltage rates up to 570 volts/millisecond and allows peak discharge currents of up to 3,000 amperes from a 0.3 microfarad energy storage capacitor for more than 1,000 operations. 3 figs.

Boettcher, G.E.

1984-10-02T23:59:59.000Z

255

Reversible photo-switching in a cell-sized vesicle  

E-Print Network (OSTI)

A photosensitive amphiphilic molecule can switch the shape of an assembled vesicle as determined by microscopic observation. Photo-isomerization induces a change in membrane fluctuation behavior or a morphological transition between ellipsoid and bud shapes, depending on the asymmetrical degree of the initial shape. The mechanism of this reversible photo-switching in the vesicle morphology is interpreted in terms of a change in the effective cross-sectional area of the photosensitive molecule.

Tsutomu Hamada; Yuko T. Sato; Takeshi Nagasaki; Kenichi Yoshikawa

2005-05-07T23:59:59.000Z

256

Studies on a small modified plasma focus opening switch  

Science Journals Connector (OSTI)

The small plasma focus device UNU/ICTP PFF has been modified to test its operation as an opening switch with a plasma filled diode as the load. Recent experiment results on this modified plasma focus opening switch (MPFOS) showing long conduction opening action have been reported [1 2 3]. In this paper a series of experiments to characterize the ion beams produced will be reported.

W. S. Leong; C. S. Wong; P. Choi; S. P. Moo

1997-01-01T23:59:59.000Z

257

Speed limitations of optical switching using a piezoelectric transducer  

E-Print Network (OSTI)

. which will be used in computer simulations to predict results of the experiment. 20 CHAPTER III EXPERIMENTAL CONFIGURATION AND RESULTS 3. 1 Conflguration of Experiment A Michelson interferometer shown in Fig. 3. 1 is used to measure the switching.... which will be used in computer simulations to predict results of the experiment. 20 CHAPTER III EXPERIMENTAL CONFIGURATION AND RESULTS 3. 1 Conflguration of Experiment A Michelson interferometer shown in Fig. 3. 1 is used to measure the switching...

Wang, Chuan-Sheng

2012-06-07T23:59:59.000Z

258

Switched reluctance motor systems poised for rapid growth  

SciTech Connect

The emergence of a rugged, versatile, and highly efficient alternative to conventional electric motors promises to have a major impact on drivepower markets over the next decade. Although switched reluctance drives are not yet available ``off the shelf`` from major motor manufacturers, they are likely to compete favorably across a broad range of applications, due to their superior performance characteristics. Switched reluctance drives maintain higher torque and efficiency over broader speed ranges than can be achieved with other advanced variable-speed systems, can be programmed to precisely match the loads they serve and, in high-volume production, are likely to be less expensive than competing systems. The principal obstacle to rapid commercialization of switched reluctance motors is the fact that few engineers are trained to perform the exacting and specialized design that this technology requires. This hurdle is gradually being overcome as over two dozen firms now design or manufacture switched reluctance drives, and several are moving into mass production applications. As these and other firms gain experience with the technology, new opportunities will arise for utilities, energy users, and original equipment manufacturers to capture the benefits of switched reluctance motor systems. This report appraises recent progress toward moving switched reluctance drives to mass production and provides an inventory of major manufacturers.

Lovins, A.B.; Howe, B.

1992-12-31T23:59:59.000Z

259

SWITCH Model Capability Overview Renewable and Appropriate Energy Laboratory http://rael.berkeley.edu/switch November 2012  

E-Print Network (OSTI)

SWITCH Model Capability Overview Renewable and Appropriate Energy Laboratory · http the investment framework captures aspects of wind and solar variability and mitigation measures, Wyoming, Nevada, Colorado, Arizona, New Mexico, Baja Mexico Norte, British Columbia, Alberta Expand

Kammen, Daniel M.

260

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

SciTech Connect

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. Transphorms transistors will enable a single semiconductor device to switch electrical currents at high-voltage in both directionsmaking 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.

None

2012-02-13T23:59:59.000Z

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


261

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 38, NO. 10, OCTOBER 2003 1739 A Dual-Path Bandwidth Extension Amplifier Topology  

E-Print Network (OSTI)

IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 38, NO. 10, OCTOBER 2003 1739 A Dual-Path Bandwidth amplifiers. I. INTRODUCTION DRIVEN by the proliferation of battery-powered portable electronic equipment

Lee, Hoi

262

High-Bandwidth Modulation of H2/Syngas Fuel to Control Combustion Dynamics in Micro-Mixing Lean Premix - Parker Hannifin  

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

Bandwidth Modulation of H Bandwidth Modulation of H 2 /Syngas Fuel to Control Combustion Dynamics in Micro-Mixing Lean Premix-Parker Hannifin Background In this congressionally directed project, Parker Hannifin Corporation (Parker), in cooperation with Georgia Institute of Technology (Georgia Tech), will enhance its micro-mixing injector platform to improve combustion operability in lean premix turbine systems by attenuating the combustion dynamics. This will be accomplished

263

Geothermal Switch Pays Off For Connecticut Business | Department of Energy  

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

Geothermal Switch Pays Off For Connecticut Business Geothermal Switch Pays Off For Connecticut Business Geothermal Switch Pays Off For Connecticut Business March 11, 2010 - 12:11pm Addthis Connecticut Wells at work installing a geothermal system. | Photo courtesy of Connecticut Wells Connecticut Wells at work installing a geothermal system. | Photo courtesy of Connecticut Wells Connecticut Wells has gone through many changes since its inception in the 1960s. One of the most significant is its transformation into a thriving geothermal well-drilling business. In the beginning, the small business drilled water wells throughout Connecticut. It was the main source of revenue for the company, "There was a big demand for many years but when building construction declined in the mid-80s, so did the demand for water wells," says president Anthony

264

National Lab 'Flips Switch' on East Coast's Largest Solar Array |  

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

National Lab 'Flips Switch' on East Coast's Largest Solar Array National Lab 'Flips Switch' on East Coast's Largest Solar Array National Lab 'Flips Switch' on East Coast's Largest Solar Array November 21, 2011 - 12:16pm Addthis An aerial view of the 32-megawatt photovoltaic array of the Long Island Solar Farm, which will produce enough energy to power up to 4,500 local homes. The central Brookhaven National Laboratory campus is seen at left. An aerial view of the 32-megawatt photovoltaic array of the Long Island Solar Farm, which will produce enough energy to power up to 4,500 local homes. The central Brookhaven National Laboratory campus is seen at left. Liisa O'Neill Liisa O'Neill Former New Media Specialist, Office of Public Affairs What are the key facts? The 32-megawatt Long Island Solar Farm Project will produce enough

265

National Lab 'Flips Switch' on East Coast's Largest Solar Array |  

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

Lab 'Flips Switch' on East Coast's Largest Solar Array Lab 'Flips Switch' on East Coast's Largest Solar Array National Lab 'Flips Switch' on East Coast's Largest Solar Array November 21, 2011 - 12:16pm Addthis An aerial view of the 32-megawatt photovoltaic array of the Long Island Solar Farm, which will produce enough energy to power up to 4,500 local homes. The central Brookhaven National Laboratory campus is seen at left. An aerial view of the 32-megawatt photovoltaic array of the Long Island Solar Farm, which will produce enough energy to power up to 4,500 local homes. The central Brookhaven National Laboratory campus is seen at left. Liisa O'Neill Liisa O'Neill Former New Media Specialist, Office of Public Affairs What are the key facts? The 32-megawatt Long Island Solar Farm Project will produce enough

266

Thyratron-choke switch for high-current nanosecond pulses  

SciTech Connect

Electric-discharge excimer lasers and high-current nanosecond accelerators, i.e., linear induction accelerators, require highcurrent nanosecond pulse (HCNP) generators with high repetition frequencies. This paper describes a design and some formulas for a thyratron-choke assembly for switching high-current nanosecond pulses, which consists of a thyratron and a single turn nonlinear choke connected in series with it; these are enclosed in a coaxial shield. The operation of a thyratronchoke assembly with a TGI1-1000/25 thyratron in switching pulses of up to 10kA with a duration of 250 nsec is studied. The current rise rate is 200 kA/usec, the pulse repetition frequency is 200 Hz, and the average switched power is 5kW.

Vizir, V.A.; Chervyakov, V.V.; Laier, A.V.; Shubkin, N.G.

1986-06-01T23:59:59.000Z

267

Stochastic Switching Games and Duopolistic Competition in Emissions Markets  

E-Print Network (OSTI)

We study optimal behavior of energy producers under a CO_2 emission abatement program. We focus on a two-player discrete-time model where each producer is sequentially optimizing her emission and production schedules. The game-theoretic aspect is captured through a reduced-form price-impact model for the CO_2 allowance price. Such duopolistic competition results in a new type of a non-zero-sum stochastic switching game on finite horizon. Existence of game Nash equilibria is established through generalization to randomized switching strategies. No uniqueness is possible and we therefore consider a variety of correlated equilibrium mechanisms. We prove existence of correlated equilibrium points in switching games and give a recursive description of equilibrium game values. A simulation-based algorithm to solve for the game values is constructed and a numerical example is presented.

Ludkovski, Michael

2010-01-01T23:59:59.000Z

268

New disc type switched reluctance motor for high torque density  

Science Journals Connector (OSTI)

A new disc type switched reluctance motor (DSRM) structure for high torque density is presented. The new motor has a double sided stator structure that provides higher torque and less acoustic noise than classical switched reluctance motors (SRMs) of small sizes. The motor is based on linear switched reluctance motors. The results of the analytical and numerical analysis are given to evaluate the effectiveness of the motor structure, and experimental noise measurement data are presented. In the numerical analysis, due to the highly nonlinear nature of the motor, finite element analysis is employed. A prototype 6/4 DSRM and a classical SRM are built and tested for experimental studies. The obtained test and simulation results show that the DSRM has a higher torque and less acoustic noise performance.

Ferhat Daldaban; Nurettin Ustkoyuncu

2007-01-01T23:59:59.000Z

269

Spark gap switch system with condensable dielectric gas  

DOE Patents (OSTI)

A spark gap switch system is disclosed which is capable of operating at a high pulse rate comprising an insulated switch housing having a purging gas entrance port and a gas exit port, a pair of spaced apart electrodes each having one end thereof within the housing and defining a spark gap therebetween, an easily condensable and preferably low molecular weight insulating gas flowing through the switch housing from the housing, a heat exchanger/condenser for condensing the insulating gas after it exits from the housing, a pump for recirculating the condensed insulating gas as a liquid back to the housing, and a heater exchanger/evaporator to vaporize at least a portion of the condensed insulating gas back into a vapor prior to flowing the insulating gas back into the housing.

Thayer, III, William J. (Kent, WA)

1991-01-01T23:59:59.000Z

270

Dynamic Switching of the Spin Circulation in Tapered Magnetic Nanodisks  

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

Dynamic Switching of the Spin 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 fischer-magnetic vortices Ferromagnetic NiFe disks (500-nm-wide and 20-nm-thick), were fabricated by e-beam lithography onto a waveguide structure. Field pulses, generated by launching current pulses into the waveguide trigger the magnetization dynamics in the elements. Using the soft x-ray microscope XM-1 providing 25-nm spatial resolution, circularly polarized soft x-rays give rise to XMCD contrast which allows to record an image of the in-plane circulation of the magnetic vortex. The topology of vortices-areas where there is a spinning motion around an imaginary axis-is a physical phenomenon which is found across a large

271

High-bandwidth Modulation of H2/Syngas Fuel to Control Combustion Dynamics in Micro-Mixing Lean Premix Systems  

SciTech Connect

The goal of this program was to develop and demonstrate fuel injection technologies that will facilitate the development of cost-effective turbine engines for Integrated Gasification Combined Cycle (IGCC) power plants, while improving efficiency and reducing emissions. The program involved developing a next-generation multi-point injector with enhanced stability performance for lean premix turbine systems that burn hydrogen (H2) or synthesis gas (syngas) fuels. A previously developed injector that demonstrated superior emissions performance was improved to enhance static flame stability through zone staging and pilot sheltering. In addition, piezo valve technology was implemented to investigate the potential for enhanced dynamic stability through high-bandwidth modulation of the fuel supply. Prototype injector and valve hardware were tested in an atmospheric combustion facility. The program was successful in meeting its objectives. Specifically, the following was accomplished: Demonstrated improvement of lean operability of the Parker multi-point injector through staging of fuel flow and primary zone sheltering; Developed a piezo valve capable of proportional and high-bandwidth modulation of gaseous fuel flow at frequencies as high as 500 Hz; The valve was shown to be capable of effecting changes to flame dynamics, heat release, and acoustic signature of an atmospheric combustor. The latter achievement indicates the viability of the Parker piezo valve technology for use in future adaptively controlled systems for the mitigation of combustion instabilities, particularly for attenuating combustion dynamics under ultra-lean conditions.

Jeff Melzak; Tim Lieuwen; Adel Mansour

2012-01-31T23:59:59.000Z

272

The design and characterization of switched-resistor filters  

E-Print Network (OSTI)

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...

Bass, James Traugott

2012-06-07T23:59:59.000Z

273

Impact of automatic switches on power distribution system reliability  

Science Journals Connector (OSTI)

In this paper quantitative impact of automatic switches on the reliability of power distribution systems is studied. Based on the characteristics of the studied system's topology, the reliability model is developed for the implementation of Monte Carlo simulation. Reliability indices on each load have been computed to obtain an overall reliability assessment of the system, and the sensitivity of the reliability indices to the location of automatic switches is also studied. Simulation results are used to illustrate the validity of the approach and are compared with the historical reliability records.

H. Zheng; Y. Cheng; B. Gou; D. Frank; A. Bern; W.E. Muston

2012-01-01T23:59:59.000Z

274

A Simulation Study on the Performance of Integrated Switching Strategy for Traffic Management in ATM Networks  

E-Print Network (OSTI)

, University of Cyprus, Nicosia, Cyprus cspitsil@turing.cs.ucy.ac.cy Petros Ioannou Department of Electrical Connec- tion Admission Control with a bandwidth allocation strat- egy [4, 5]. By seeking the cooperation regulation, bandwidth allocation, routing, queue scheduling, and buffer management. Whilst it was recognized

Pitsillides, Andreas

275

Low Crosstalk Design of an Optical Matrix Switch Using Phase-Change Material  

Science Journals Connector (OSTI)

A crossbar type optical matrix switch using phase-change material was designed to have low crosstalk. The crosstalk of less than -49.1 dB was achieved for a 44 matrix switch by...

Moriyama, Takumi; Tanaka, Daiki; Jain, Paridhi; Tsuda, Hiroyuki

276

650-nm 1 2 polymeric thermo-optic switch with low power consumption  

Science Journals Connector (OSTI)

In this paper, a low-power 1 2 polymeric thermo-optic switch operating at the polymer optical fiber low-loss window of 650 nm was studied. The characteristic parameters of the switch...

Wang, Xi-Bin; Sun, Jian; Liu, Yu-Fen; Sun, Jing-Wen; Chen, Chang-Ming; Sun, Xiao-Qiang; Wang, Fei; Zhang, Da-Ming

2014-01-01T23:59:59.000Z

277

CommonKADS Methodology for Developing Power Grid Switching Orders Systems  

Science Journals Connector (OSTI)

Modeling knowledge and expertise is necessary but difficult in formation of switching operation orders in power systems. Switching operations of electrical components are very frequent in normal changes of operat...

Ming Zhou; Jianwen Ren; Jianxun Qi

2007-01-01T23:59:59.000Z

278

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

E-Print Network (OSTI)

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

Yoo, S. J. Ben

279

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

E-Print Network (OSTI)

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 ...

Weber, Alexis Christian, 1974-

2008-01-01T23:59:59.000Z

280

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework  

E-Print Network (OSTI)

Left invertibility, flatness and identifiability of switched linear dynamical systems: a framework invertibility and flatness, dynamical systems are structurally equivalent to some specific cryptographic invertibility, flatness and identifiability of discrete- time switched linear systems are investigated

Paris-Sud XI, Université de

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281

Energy Efficient Optical Burst Switched (OBS) Balagangadhar G. Bathula, Jaafar M. H. Elmirghani  

E-Print Network (OSTI)

Energy Efficient Optical Burst Switched (OBS) Networks Balagangadhar G. Bathula, Jaafar M. H for optical burst switched networks that reduces energy consumption without significantly degrading and hence energy efficiency is an important issue. Due to the advances in optical transmission

Bathula, Balagangadhar G

282

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

E-Print Network (OSTI)

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 ...

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

2003-01-01T23:59:59.000Z

283

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

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

284

Simultaneity of Spark Gap Switch Firing in the Dense Plasma Focus Device  

Science Journals Connector (OSTI)

To gain insight into the synchronization, simultaneity, and switching behavior of the individual switch, two TIA-525 Optical/Electrical converters have been recently introduced to DPF experiments at Lawrencevi...

S. Krupakar Murali; Aaron M. Blake; A. Haboub

2011-10-01T23:59:59.000Z

285

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

NLE Websites -- All DOE Office Websites (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...

286

Electrochromically switched, gas-reservoir metal hydride devices with  

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

Electrochromically switched, gas-reservoir metal hydride devices with Electrochromically switched, gas-reservoir metal hydride devices with application to energy-efficient windows Title Electrochromically switched, gas-reservoir metal hydride devices with application to energy-efficient windows Publication Type Journal Article LBNL Report Number LBNL-1089E Year of Publication 2008 Authors Anders, André, Jonathan L. Slack, and Thomas J. Richardson Journal Thin Solid Films Volume 1 Date Published 08/2003 Call Number LBNL-1089E Abstract Proof-of-principle gas-reservoir MnNiMg electrochromic mirror devices have been investigated. In contrast to conventional electrochromic approaches, hydrogen is stored (at low concentration) in the gas volume between glass panes of the insulated glass units (IGUs). The elimination of a solid state ion storage layer simplifies the layer stack, enhances overall transmission, and reduces cost. The cyclic switching properties were demonstrated and system durability improved with the incorporation a thin Zr barrier layer between the MnNiMg layer and the Pd catalyst. Addition of 9% silver to the palladium catalyst further improved system durability. About 100 full cycles have been demonstrated before devices slow considerably. Degradation of device performance appears to be related to Pd catalyst mobility, rather than delamination or metal layer oxidation issues originally presumed likely to present significant challenges.

287

ORIGINAL ARTICLE Single ferroelectric-domain photovoltaic switch based  

E-Print Network (OSTI)

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

Jo, Moon-Ho

288

Optically-initiated silicon carbide high voltage switch  

DOE Patents (OSTI)

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.

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

289

Quantum coherent switch utilizing commensurate nanoelectrode and charge density periodicities  

DOE Patents (OSTI)

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.

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

2008-08-05T23:59:59.000Z

290

Fuzzy logic design of self-tuning switching power supply  

Science Journals Connector (OSTI)

This paper presents the design of a variable-voltage DC source using proportional and integral (PI)-like fuzzy logic controller (FLC). Three types of topology (buck converter, boost converter, and buck-boost converter) are used to step down, step up, ... Keywords: Duty cycle, PI-like fuzzy logic controller, Self-tuning switching power supply

Chin-Hsing Cheng; Po-Jen Cheng; Ming-Tzong Wu

2010-04-01T23:59:59.000Z

291

Digit switch evaluations and capillary IPA (isopropyl alcohol) study  

SciTech Connect

Capillary flow of isopropyl alcohol under the wire insulation of an eleven-wire cable dissolved trapped flux from the pretinning and soldering operations and caused it to deposit on the circuit board inside a digit switch. Conformal coatings were successful in sealing the wire insulation gap to prevent solvent flow. 16 figs., 2 tabs.

Mizik, P.M.; Kibalo, E.F.

1990-12-01T23:59:59.000Z

292

Development and application of an advanced switched reluctance generator drive  

E-Print Network (OSTI)

of the generator, system designers always strive for increasing power density, or in other words, maximizing the output power for a given size. Despite the extensive research on the motoring operation of the Switched Reluctance Machine, only a few publications have...

Asadi, Peyman

2009-05-15T23:59:59.000Z

293

Modelling and Simulation of Switched Reluctance Motor Based on Comsol  

Science Journals Connector (OSTI)

Switched reluctance motor (SRM) drives have gained many attentions from researcher which will be used for automotive applications that needs high speed, wider range of constant power capability, ruggedness, and fault tolerance. This paper focuses on ... Keywords: SRM, Modelling, Simulation, COMSOL, FEA-Finite Element Analysis, Design

Umar Sholahuddin, Agus Purwadi, Nana Heryana, Hilwadi Hindersyah

2013-12-01T23:59:59.000Z

294

Switched reluctance motor based electromechanical brake-by-wire system  

Science Journals Connector (OSTI)

This article presents an overview of electronic braking systems using SR (Switched Reluctance) machines. The advantages presented by this structure when compared to the conventional hydraulic systems are discussed. A justification for the choice of the SRM as a valid candidate is provided, with a detailed analysis of its control structure and performance. Experimental results obtained using a digital signal processor are also presented.

S. Underwood; A. Khalil; I. Husain; H. Klode; B. Lequesne; S. Gopalakrishnan; A. Omekanda

2004-01-01T23:59:59.000Z

295

Chiral imides as potential chiroptical switches: synthesis and optical properties  

E-Print Network (OSTI)

of a molecule upon application of electric fields to the switching cell or de- vice.5­7 Electrochromic compounds different. Aromatic imides are known to be electrochromic with intense UV­vis absorptions in their neutral; Naphthalene imides; Electrochromic; Fluorescence. * Corresponding author. Tel.: +1 613 520 2600x2713; fax: +1

Wan, Xin-hua

296

Learning to model sequences generated by switching distributions Yoav Freund  

E-Print Network (OSTI)

Learning to model sequences generated by switching distributions Yoav Freund AT&T Bell Labs 600 distributions learning problem. A sequence S = oe 1 oe 2 : : : oe n , over a finite alphabet \\Sigma is generated run is generated by independent random draws from a distribution ~ p i over \\Sigma, where ~p i

Freund, Yoav

297

Switching behaviour of two-phenotype bacteria in varying environment  

E-Print Network (OSTI)

Switching behaviour of two-phenotype bacteria in varying environment G Friedman1, P Gurevich2, S McCarthy3 and D Rachinskii3 1 Department of Electrical and Computer Engineering, Drexel University phenotype to the other in response to variations in environmental conditions. We model a population

Fiedler, Bernold

298

Comparative genomics of the mimicry switch in Papilio dardanus  

Science Journals Connector (OSTI)

...and source are credited. Comparative genomics of the mimicry switch in Papilio dardanus...recombination analyses and comparative genomics, we show that H co-segregates with...20,21]. Here, we use comparative genomics of wild-caught populations to characterize...

2014-01-01T23:59:59.000Z

299

Deep subwavelength plasmonic waveguide switch in double graphene layer structure  

E-Print Network (OSTI)

Deep subwavelength plasmonic waveguide switch in double graphene layer structure Hideo Iizuka in double graphene layer structure Hideo Iizuka1,a) and Shanhui Fan2,b) 1 Toyota Central Research December 2013) Graphene provides excellent prospects of the dynamic tunability, low propagation loss

Fan, Shanhui

300

Multiple crossbar network: A switched high-speed local network  

SciTech Connect

The Multiple Crossbar Network (MCN) is a prototype High-Speed Local Network at the Los Alamos National Laboratory. It will interconnect supercomputers, network servers and workstations from various commercial vendors. The MCN can also serve as a backbone for message traffic between local area networks. The MCN is a switched local network of switching nodes called Cross-Point Stars (CPs). Hosts and CPs are connected by 800-Mbit/s (100-Mbyte/s) point-to-point ANSI High-Speed Channels. CPs include RISC-based network protocol processors called Crossbar Interfaces and a switching core called the Crossbar Switch. Protocols include physical, data link, intranet, and network access functionality. Various internet and transport protocols are intended to run above the MCN protocol suite. A network management and simple naming service is also included within the Los Alamos Network Architecture. Immediate applications include visualization. The MCN is intended to also serve as a framework for multicomputer applications. 36 refs., 10 figs.

Hoebelheinrich, R.; Thomsen, R.

1989-01-01T23:59:59.000Z

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


301

WDM Burst Switching for Petabit Data Networks Jonathan S. Turner  

E-Print Network (OSTI)

protocols, like IP. This paper briefly summarizes the operational principles of WDM burst switchingnetworks Principles. Burst switching systems assign user data bursts to channels in WDM links on-the-fly in order to provide efficient statistical multiplexing of high rate data channels. The transmission links in a burst

Turner, Jonathan S.

302

Monitoring Gene Expression In Vivo with Nucleic Acid Molecular Switches  

SciTech Connect

The overall objectives of this project were (1) to develop allosteric ribozymes capable of acting as molecular switches for monitoring the levels of both wild-type and mutant mRNA species in living cells and whole animals and (2) to develop highly efficient reagents to deliver nucleic acid molecular switches into living cells, tissues and animals with the ultimate goal of expression profiling specific mRNAs of diagnostic or prognostic value within tumors in animals. During the past year, we have moved our laboratory to Nevada and in the moving process we have lost electronic and paper copies of prior progress reports concerning the construction and biological properties of the molecular switches. Since there was minimal progress during the last year on molecular switches, we are relying on past project reports to provide a summary of our data on this facet of the grant. Here we are summarizing the work done on the delivery reagents and their application to inducing mutations in living cells, which will include work done during the no cost extension.

David C. Ward; Patricia Bray-Ward

2005-01-26T23:59:59.000Z

303

Plasma focus as a current switch for a capillary discharge  

Science Journals Connector (OSTI)

Experiments are described in which a plasma focus is used simultaneously as an inductive store...12 A/s, and the maximum values of the switched current lie in the range 50100 kA. The technique is seen as promisi...

. Yu. Khautiev; P. S. Antsiferov; L. A. Dorokhin; K. N. Koshelev

1998-11-01T23:59:59.000Z

304

Lithium Niobate Devices in Switching and Multiplexing [and Discussion  

Science Journals Connector (OSTI)

28 September 1989 research-article Lithium Niobate Devices in Switching and Multiplexing...Thylen Integrated-optics devices in lithium niobate have reached a significant maturity...in fibre-optic transmission systems, lithium niobate devices currently offer the only...

1989-01-01T23:59:59.000Z

305

Task Assignment in a Server Farm with Switching Delays and  

E-Print Network (OSTI)

costs Holding costs (per job) Objective to balance between Energy consumption Performance (e.g., latency Energy- and Delay-aware cost structure Switching costs Running costs Holding costs (per job) Objective to balance between Energy consumption Performance (e.g., latency) Heterogeneous servers, job-specific costs

Hyytiä, Esa

306

Integrated packaging allows for improvement in switching characteristics of silicon carbide devices  

E-Print Network (OSTI)

Integrated packaging allows for improvement in switching characteristics of silicon carbide devices will be available after the conference. Abstract Silicon Carbide devices can achieve very high switching speed-mode filtering). The consequences on the switching speed are discussed. 1. Introduction Silicon carbide (Si

Paris-Sud XI, Université de

307

Large 1/f noise of unipolar resistance switching and its percolating nature S. B. Lee,1  

E-Print Network (OSTI)

Large 1/f noise of unipolar resistance switching and its percolating nature S. B. Lee,1 S. Park,2 J-747, Republic of Korea 2 Quantum Materials Research Team, Korea Basic Science Institute, Daejeon 305 that show unipolar resistance switching. When they were switched from the low to high resistance states

Kahng, Byungnam

308

Optical Label Switching Technology and Energy-Efficient Future Networks S. J. Ben Yoo  

E-Print Network (OSTI)

Optical Label Switching Technology and Energy-Efficient Future Networks S. J. Ben Yoo Department traffic with extremely low energy consumption and high goodput. Keywords: Optical packet switching, optical label switching, energy efficient networks. 1. Introduction The future Internet is rapidly

Kolner, Brian H.

309

Design and simulation of planar electro-optic switches in ferroelectrics Mahesh Krishnamurthi,a  

E-Print Network (OSTI)

Design and simulation of planar electro-optic switches in ferroelectrics Mahesh Krishnamurthi polarization dependent planar optical switches based on the electro-optic effect in ferroelectrics operating at 1.55 m wavelength are presented. The first design is a 3 3 optical switch based entirely on electro-optic

Gopalan, Venkatraman

310

Modeling of switched reluctance motors based on optimized BP neural networks with parallel chaotic search  

Science Journals Connector (OSTI)

Precise modeling of switched reluctant motor (SRM) is important of switched reluctant motor driving system. In the article, modeling of SRM by a BP neural network with parallel chaotic search (PCS) is presented firstly. Here parallel chaotic search is ... Keywords: BP neural network, optimize, parallel chaotic search, switched reluctant motor

Yong Cheng; Hui Lin

2010-03-01T23:59:59.000Z

311

Speed-sensorless control of switched-reluctance motors with uncertain payload  

E-Print Network (OSTI)

Speed-sensorless control of switched-reluctance motors with uncertain payload Antonio Loría Gerardo that the model of switched- reluctance motors does not admit such handy change of coordinates, imposes Espinosa­Pérez Erik Chumacero Missie Aguado-Rojas Abstract-- We present a controller for switched-reluctance

Boyer, Edmond

312

Fig. 1: Schematic of the optoelectronic switch. Source/drain and channel regions formed in Si.  

E-Print Network (OSTI)

Si Ge E-field Fig. 1: Schematic of the optoelectronic switch. Source/drain and channel regions (z) energy Novel Si-based CMOS Optoelectronic Switching Device Operating in the Near Infrared Ali K, high performance optoelectronic switch is introduced. The device is a Si- MOSFET with Ge gate that can

Miller, David A. B.

313

The effects of mobile ATM switches on PNNI peer group operation  

SciTech Connect

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.

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

1997-04-01T23:59:59.000Z

314

Open-Air, Broad-Bandwidth Trace-Gas Sensing with a Mid-Infrared Optical Frequency Comb  

E-Print Network (OSTI)

A mid-Infrared frequency comb is produced via an optical parametric oscillator (OPO) pumped by an amplified 100 MHz Yb:fiber mode-locked laser. We use this source to make measurements of the concentration of the atmospherically-relevant species of CH4 and H2O over a bandwidth of 100 nm centered at 3.25 um. Multiple absorption lines for each species are detected with millisecond acquisition time using a virtually-imaged phased array (VIPA) spectrometer. The measured wavelength-dependent absorption profile is compared to and fitted by a model, yielding quantitative values of the atmospheric concentration of both CH4 and H2O in a controlled indoor environment, as well as over a 26 m open air outdoor path.

Nugent-Glandorf, Lora; Diddams, Scott A

2014-01-01T23:59:59.000Z

315

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

SciTech Connect

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.

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

316

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

DOE Patents (OSTI)

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.

Bolton, Paul R. (Menlo Park, CA)

1992-01-01T23:59:59.000Z

317

Switching behaviour of consumers across options in the energy market: a comparative analysis in Mexico  

Science Journals Connector (OSTI)

This paper analyses how economic, behavioural, and service attributes influence households' decisions to switch among three energy options: LP gas, electricity, and renewable energy. While previous studies in switching behaviour have assessed economic, behavioural, and services-related attributes separately, this paper proposes an integrative model that includes these three factors together. Mexico has shale gas reserves in monopolistic hands which may face the entrance of new participants. This paper proposes a conceptual framework for switching behaviour in energy. Based on 161 surveys from Mexican households, the impact of 17 variables on switching decisions is measured with regression techniques. Findings suggest positive effects of high switching costs and low satisfaction level on switching intentions while consumption habits and social norms were found to produce mixed results on consumers' switching decisions. Some effects of inertial and locked-in behaviours explain the intriguing findings. Implications ranging from energy marketing for new entrants, to energy policy making, to further research are discussed.

Pável Reyes-Mercado; Rajagopal

2014-01-01T23:59:59.000Z

318

1-Methyl Naphthalene Reorientation at the Air-Liquid Interface upon Water Saturation Studied by Vibrational Broad Bandwidth Sum Frequency Generation Spectroscopy  

E-Print Network (OSTI)

will encounter gas-phase water molecules or may react with atmospheric oxidants. The uptake and reaction1-Methyl Naphthalene Reorientation at the Air-Liquid Interface upon Water Saturation Studied by Vibrational Broad Bandwidth Sum Frequency Generation Spectroscopy Elizabeth L. Hommel and Heather C. Allen

319

Oblivious Routing in On-Chip Bandwidth-Adaptive Myong Hyon Cho, Mieszko Lis, Keun Sup Shim, Michel Kinsy, Tina Wen and Srinivas Devadas  

E-Print Network (OSTI)

link, and this reconfiguration can be done very rapidly in response to changing traffic demands. We Massachusetts Institute of Technology Cambridge, MA {mhcho, mieszko, ksshim, mkinsy, tinaw, devadas, especially when bandwidth demands of flows vary with time, because routes are not adjusted for different

Gifford, David K.

320

In this paper we present a QoS scheduler that assigns the bandwidth over the wireless channel such that the  

E-Print Network (OSTI)

transmission frame scheduling that concatenates uplink and downlink traffic of one mobile, and 2) a long the required amount of energy. In previous work [5] we have presented a MAC scheduling principle for a TDMA, albeit not providing the most efficient bandwidth utilisation. The scheduling principle (called mobile

Havinga, Paul J.M.

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


321

1998 SPIE Smart Structures and Materials Conf. Paper #3329-19/3327-42 High bandwidth tunability in a smart vibration absorber  

E-Print Network (OSTI)

in a smart vibration absorber Alison B. Flatau, Marcelo J. Dapino and Frederick T. Calkinsà , Aerospace Engr, Phantom Works, Seattle WA 98124-2499 ABSTRACT The theory of an electrically tunable Terfenol-D vibration bandwidth tunability in the performance of a Terfenol-D vibration absorber. Keywords: vibration absorber

Flatau, Alison B.

322

Microsoft Word - BingenSwitchDisposition_CXMemo.doc  

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

7, 2012 7, 2012 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Joan Kendall Realty Specialist - TERR-3 Proposed Action: Bingen Substation Sectionalizing Switches Disposition Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.24 Property Transfers Location: Klickitat County, Washington Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to sell two sectionalizing switches owned by BPA but located on PacifiCorp's Condit-Powerdale 69-kilovolt (kV) line in and adjacent to the Bingen Substation. BPA sold the Bingen substation to Klickitat County PUD in 1997 but retained ownership rights to inspect, maintain, repair, and replace its remaining revenue meters,

323

Seismic vulnerability assessment of a high voltage disconnect switch  

Science Journals Connector (OSTI)

Abstract This paper deals with the seismic vulnerability of high voltage equipment typically installed in electric substations. In particular, the seismic response of a 380kV vertical disconnect switch has been investigated based on the results of an experimental campaign carried out at Roma Tre University. According to a series of non-linear analyses, the influence of the most significant parameters on the seismic behavior of this apparatus has been analyzed and the corresponding fragility curves have been evaluated by using the Effective Fragility Analysis method. The results showed a limited vulnerability of the disconnect switch, whose most critical parts are the bottom joint of the ceramic support column and the steel column base.

Fabrizio Paolacci; Renato Giannini; Silvia Alessandri; Gianmarco De Felice

2014-01-01T23:59:59.000Z

324

Distribution of supercurrent switching in graphene under the proximity effect.  

SciTech Connect

We study the stochastic nature of switching current in hysteretic current-voltage characteristics of superconductor-graphene-superconductor junctions. We find that the dispersion of the switching current distribution scales with temperature as {sigma}{sub I} {proportional_to} T{sup {alpha}{sub G}} with {alpha}{sub G} as low as 1/3. This observation is in sharp contrast to the known Josephson junction behavior where {sigma}{sub I} {proportional_to} T{sup {alpha}{sub J}} with {alpha}{sub J} = 2/3. We propose an explanation using a generalized version of Kurkijaervi's theory for the flux stability in rf-SQUID and attribute this anomalous effect to the temperature dependence of the critical current which persists down to low temperatures.

Coskun, U. C.; Brenner, M.; Hymel, T.; vakaryuk, V.; Levchenko, A.; Bezryadin, A. (Materials Science Division); (Univ. Illinois-Urbana); (Univ. Texas); (Michigan State Univ.)

2012-01-01T23:59:59.000Z

325

Heat transfer between anisotropic nanopartricles: Enhancement and switching  

E-Print Network (OSTI)

We theoretically study heat transfer between two anisotropic nanoparticles in vacuum, and derive closed expressions in terms of the anisotropic dipole polarizabilities. We show that transfer between two small spheroids can be many times as large as the one for two spheres of same volumes. Such increase with anisotropy is also found for the heat emission of an isolated small spheroid. Furthermore, we observe a strong dependence of transfer on the relative orientation, yielding the interpretation as a heat transfer switch. The switch quality, given as the ratio of transfer in the ``on'' and ``off'' positions, is observed to be as large as $10^3$ in the near field and even larger in the far field.

Roberta Incardone; Thorsten Emig; Matthias Krger

2014-02-21T23:59:59.000Z

326

Plasma Switch for High-Power Active Pulse Compressor  

SciTech Connect

Results are presented from experiments carried out at the Naval Research Laboratory X-band magnicon facility on a two-channel X-band active RF pulse compressor that employed plasma switches. Experimental evidence is shown to validate the basic goals of the project, which include: simultaneous firing of plasma switches in both channels of the RF circuit, operation of quasi-optical 3-dB hybrid directional coupler coherent superposition of RF compressed pulses from both channels, and operation of the X-band magnicon directly in the RF pulse compressor. For incident 1.2 ?s pulses in the range 0.63 ? 1.35 MW, compressed pulses of peak powers 5.7 ? 11.3 MW were obtained, corresponding to peak power gain ratios of 8.3 ? 9.3. Insufficient bakeout and conditioning of the high-power RF circuit prevented experiments from being conducted at higher RF input power levels.

Hirshfield, Jay L. [Omega-P, Inc.] [Omega-P, Inc.

2013-11-04T23:59:59.000Z

327

Anisotropic high temperature superconductors as variable resistors and switches  

SciTech Connect

Several anisotropic high temperature superconductors show critical current densities which are strongly dependent on the direction of an applied external magnetic field. The resistance of a sample can change by several orders of magnitude by applying a magnetic field. The potential for using the field dependent variable resistor or switch for applications in power systems is evaluated. Test results with small samples are presented. The requirements for large scale applications are outlined. The magnetic field triggering requirement, the frequency response of the device, use in 60 Hz ac circuits and heat transfer consideration are investigated. Several application examples are discussed. Use of variable resistor as a fault current limiter, as a switching element in rectifier circuitry and as an improved dump resistor for a superconducting magnet is presented.

Boenig, H.J.; Daugherty, M.A.; Fleshler, S.; Maley, M.P.; Mueller, F.M.; Prenger, F.C.; Coulter, J.Y.

1994-12-01T23:59:59.000Z

328

Lyons Switch, Oklahoma: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Switch, Oklahoma: Energy Resources Switch, Oklahoma: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 35.7749095°, -94.6915484° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":35.7749095,"lon":-94.6915484,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

329

Fault diagnosis and management system for switched reluctance motor drives  

Science Journals Connector (OSTI)

An effective detection and diagnosis of faults is desirable for online condition monitoring, assessment, product quality assurance and improved operational efficiency of Switched Reluctance Motor (SRM) drives. The proposed fault diagnosis and management system uses the measured phase voltages, currents and speed of the motor. In this article, a Matlab/Simulink model-based fault diagnosis system is developed and simulated for SRM drive. The simulation results show that the SRM drive is capable of operating under faulty conditions.

S. Vijayan; S. Paramasivam

2008-01-01T23:59:59.000Z

330

Maintaining Space Temperature and Humidity in the Digital Switch Environment  

E-Print Network (OSTI)

laboratory College Station, Texas ABSTRACT A methodology for a psychrometric analysis of the problem of maintaining space temperature and humidity in the digital switch environment is presented. Such spaces produce minimum or no humidity generation. Several... must be considered. The intent of this paper is to outline a simple methodology to compute cooling and Henry Johnstone, P.E. Mechanical Engineer GLHN, Inc. Tucson, Arizona humidification loads at any location, using a variety of techniques for space...

Saman, N. F.; Johnson, H.

331

Tunnel MOS Heterostructure Field Effect Transistor for RF Switching Applications  

E-Print Network (OSTI)

. ..................................................................................... 5 Figure 4. The lattices of N-face and Ga-face gallium nitride. .......................................... 10 Figure 5. The lattice constants and bandgaps of III-nitride semiconductors and their alloys... semiconductors and particularly Gallium Nitride (GaN) are gaining a lot of attention for high speed and high power switching applications due to their large critical breakdown electric fields, high mobility and high saturated electron velocity [1, 2]. GaN has...

Rezanezhad Gatabi, Iman

2013-06-06T23:59:59.000Z

332

Phase-dependent coherent population trapping and optical switching  

SciTech Connect

We propose a scheme for achieving phase-dependent coherent population trapping, showing that both the dark state of the atoms and light propagation dynamics depend on the relative phase of the fields. The atomic coherence prepared via adiabatic process plays a key role in the interaction of light with matter. And an optical switching based on the phase-controlled quantum interference is implemented, which may have potential application in high-speed optical communications and quantum information systems.

Kou, J. [College of Physics, Jilin University, Changchun 130023 (China); Quantum Engineering Center, Beijing Institute of Control Device, Beijing 100854 (China); Wan, R. G.; Kang, Z. H.; Jiang, L.; Wang, L.; Jiang, Y.; Gao, J. Y. [College of Physics, Jilin University, Changchun 130023 (China)

2011-12-15T23:59:59.000Z

333

A study of explosively formed fuse (EFF) opening switch resistance  

SciTech Connect

Many pulsed power experiments need pulse shaping to optimize the power flow from a flux compression generator (FCG) to an experimental load. In a laboratory environment this can be a simple task where the switches are not destroyed. However, in experiments with high explosives, where a large amount of damage occurs, a single use EFF opening switch may be a good choice. In an EFF, explosives are used to thin a current carrying sheet of aluminum as it is forced into a grooved dye. The current is modified by the time dependent changes in resistance as the aluminum is stretched. We will correlate the hydrodynamic effects with resistance. The hydrodynamic profile is determined by Mesa-2D, a well proven hydrodynamics computer code, and MA THEMA TICA is used convert material contours into total resistance using the resistivity as a function of time from various sources. Experimentally, we will determine the actual resistance and compare it with the calculated values. We have used these switches for decades but still do not understand the details of the physics. The resistance change may be due to several processes but in this paper we will concentrate on stretching as the most important contribution. Also, in this paper we will compare the details of the hydrodynamics with the details of experimental and calculated resistance and hopefully generate a predictive model for future designs with other geometries and materials.

Oona, Henn [Los Alamos National Laboratory; Goforth, James H [Los Alamos National Laboratory; Herrera, Dennis H [Los Alamos National Laboratory; Tasker, Douglas G [Los Alamos National Laboratory; Torres, D. T. [Los Alamos National Laboratory

2010-12-21T23:59:59.000Z

334

Active high-power RF switch and pulse compression system  

DOE Patents (OSTI)

A high-power RF switching device employs a semiconductor wafer positioned in the third port of a three-port RF device. A controllable source of directed energy, such as a suitable laser or electron beam, is aimed at the semiconductor material. When the source is turned on, the energy incident on the wafer induces an electron-hole plasma layer on the wafer, changing the wafer's dielectric constant, turning the third port into a termination for incident RF signals, and. causing all incident RF signals to be reflected from the surface of the wafer. The propagation constant of RF signals through port 3, therefore, can be changed by controlling the beam. By making the RF coupling to the third port as small as necessary, one can reduce the peak electric field on the unexcited silicon surface for any level of input power from port 1, thereby reducing risk of damaging the wafer by RF with high peak power. The switch is useful to the construction of an improved pulse compression system to boost the peak power of microwave tubes driving linear accelerators. In this application, the high-power RF switch is placed at the coupling iris between the charging waveguide and the resonant storage line of a pulse compression system. This optically controlled high power RF pulse compression system can handle hundreds of Megawatts of power at X-band.

Tantawi, Sami G. (San Mateo, CA); Ruth, Ronald D. (Woodside, CA); Zolotorev, Max (Mountain View, CA)

1998-01-01T23:59:59.000Z

335

A new energy optimizing control strategy for switched reluctance motors  

SciTech Connect

This paper describes a new and machine-independent method to minimize the energy consumption of a speed controlled Switched Reluctance Motor (SRM). The control strategy is to vary the duty cycle of the applied dc voltage in order to obtain the desired speed quickly and when operating in steady-state vary the turn-on angle ({alpha}{sub on}) of the phase voltage to minimize the energy consumption. The power flow is measured in the dc-link and used to control the turn-on angle. Simulations carried out on a three-phase 6/4 pole SRM justify the algorithm and the physical implementation in a Siemens SAB 80C517A microcontroller is described. Measurements on two different load systems show it is possible to minimize the energy consumption on-line in a speed controlled Switched Reluctance Motor without losing the dynamic performance. A comparison with an ordinary mode-shift controlled SRM shows more than an 8% increase in overall efficiency for some operation points. The algorithm is fully applicable to other Switched Reluctance Motors at other power levels or with other pole configurations.

Kjaer, P.C. [Univ. of Glasgow (United Kingdom)] [Univ. of Glasgow (United Kingdom); Nielsen, P. [Danfoss A/S, Graasten (Denmark). Transmission Div.] [Danfoss A/S, Graasten (Denmark). Transmission Div.; Andersen, L. [Nilfisk A/S, Broendby (Denmark)] [Nilfisk A/S, Broendby (Denmark); Blaabjerg, F. [Aalborg Univ. (Denmark)] [Aalborg Univ. (Denmark)

1995-09-01T23:59:59.000Z

336

Nanophotonic quantum phase switch with a single atom  

E-Print Network (OSTI)

In analogy to transistors in classical electronic circuits, a quantum optical switch is an important element of quantum circuits and quantum networks. Operated at the fundamental limit where a single quantum of light or matter controls another field or material system, it may enable fascinating applications such as long-distance quantum communication, distributed quantum information processing and metrology, and the exploration of novel quantum states of matter. Here, by strongly coupling a photon to a single atom trapped in the near field of a nanoscale photonic crystal cavity, we realize a system where a single atom switches the phase of a photon, and a single photon modifies the atom's phase. We experimentally demonstrate an atom-induced optical phase shift that is nonlinear at the two-photon level, a photon number router that separates individual photons and photon pairs into different output modes, and a single-photon switch where a single "gate" photon controls the propagation of a subsequent probe fiel...

Tiecke, T G; de Leon, N P; Liu, L R; Vuleti?, V; Lukin, M D

2014-01-01T23:59:59.000Z

337

4 ESS (trademark) switch electromagnetic-pulse assessment. Volume 2. Task 3 laboratory testing of the 4 ESS Switch. Final report  

SciTech Connect

The 4ESS Switch was subjected to test sequences representative of electromagnetic stresses following a high-altitude nuclear blast. These laboratory tests revealed some potential equipment sensitivities requiring only minor modifications. With these modifications implemented, the 4 ESS Switch demonstrated considerable robustness in servicing calls following current injection stress. (jhd)

Not Available

1989-12-01T23:59:59.000Z

338

V-010: 3Com, HP, and H3C Switches SNMP Configuration Lets Remote Users Take  

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

10: 3Com, HP, and H3C Switches SNMP Configuration Lets Remote 10: 3Com, HP, and H3C Switches SNMP Configuration Lets Remote Users Take Administrative Actions V-010: 3Com, HP, and H3C Switches SNMP Configuration Lets Remote Users Take Administrative Actions October 25, 2012 - 6:00am Addthis PROBLEM: 3Com, HP, and H3C Switches SNMP Configuration Lets Remote Users Take Administrative Actions PLATFORM: 3COM, and H3C Routers & Switches Specific products and model numbers is provided in the vendor's advisory. ABSTRACT: A vulnerability was reported in 3Com, HP, and H3C Switches. REFERENCE LINKS: HP Support document ID: c03515685 SecurityTracker Alert ID: 1027694 CVE-2012-3268 IMPACT ASSESSMENT: High DISCUSSION: A remote user with knowledge of the SNMP public community string can access potentially sensitive data (e.g., user names, passwords) in the

339

Reduction of Systematic Errors in Diagnostic Receivers Through the Use of Balanced Dicke-Switching and Y-Factor Noise Calibrations  

SciTech Connect

Receivers designed for diagnostic applications range from those having moderate sensitivity to those possessing large dynamic range. Digital receivers have a dynamic range which are a function of the number of bits represented by the ADC and subsequent processing. If some of this range is sacrificed for extreme sensitivity, noise power can then be used to perform two-point load calibrations. Since load temperatures can be precisely determined, the receiver can be quickly and accurately characterized; minute changes in system gain can then be detected, and systematic errors corrected. In addition, using receiver pairs in a balanced approach to measuring X+, X-, Y+, Y-, reduces systematic offset errors from non-identical system gains, and changes in system performance. This paper describes and demonstrates a balanced BPM-style diagnostic receiver, employing Dicke-switching to establish and maintain real-time system calibration. Benefits of such a receiver include wide bandwidth, solid absolute accuracy, improved position accuracy, and phase-sensitive measurements. System description, static and dynamic modelling, and measurement data are presented.

John Musson, Trent Allison, Roger Flood, Jianxun Yan

2009-05-01T23:59:59.000Z

340

14 ESS (trademark) switch inherent radiation-hardness assessment. Volume 1. Final report  

SciTech Connect

The objective of Phase I of the 4 ESS Switch RHA Program documented in this report is the preliminary assessment of the inherent fallout-radiation susceptibility of the 4 ESS Switch. The approach described herein consists of the identification of the active microelectronic piece-parts used in the 4 ESS Switch; characterization of their radiation tolerance, based on available data; preliminary identification of hardness-critical packs; and preliminary analysis of 4 ESS Switch performance during expose to ambient (unshielded) fallout radiation, also based on available data. (Author)

Not Available

1990-07-01T23:59:59.000Z

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


341

Coupling between Switching Regulation and Torque Generation in Bacterial Flagellar Motor  

Science Journals Connector (OSTI)

The bacterial flagellar motor plays a crucial role in both bacterial locomotion and chemotaxis. Recent experiments reveal that the switching dynamics of the motor depend on the rotation speed of the motor, and thus the motor torque, nonmonotonically. Here we present a unified mathematical model which treats motor torque generation based on experimental torque-speed curves and the torque-dependent switching based on the conformational spread model. The model successfully reproduces the observed switching rate as a function of the rotation speed, and provides a generic physical explanation independent of most details. A stator affects the switching dynamics through two mechanisms: accelerating the conformational flipping rate of individual rotor-switching units, which contributes most when the stator works at a high torque and thus a low speed; and influencing a larger number of rotor-switching units within unit time, whose contribution is the greatest when the motor rotates at a high speed. Consequently, the switching rate shows a maximum at intermediate speed, where the above two mechanisms find an optimal output. The load-switching relation may serve as a mechanism for sensing the physical environment, similar to the chemotaxis mechanism for sensing the chemical environment. It may also coordinate the switch dynamics of motors within the same cell.

Fan Bai; Tohru Minamino; Zhanghan Wu; Keiichi Namba; Jianhua Xing

2012-04-24T23:59:59.000Z

342

A single-stage optical load-balanced switch for data centers  

Science Journals Connector (OSTI)

Load balancing is an attractive technique to achieve maximum throughput and optimal resource utilization in large-scale switching systems. However current electronic load-balanced...

Huang, Qirui; Yeo, Yong-Kee; Zhou, Luying

2012-01-01T23:59:59.000Z

343

E-Print Network 3.0 - accelerated segment switch Sample Search...  

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

College Collection: Biology and Medicine 38 Switch Characterization and the Haptic Profile David Weir, Michael Peshkin, J. Edward Colgate Summary: a 38 inch diameter load...

344

Three Phase Switched Reluctance Motor Control Using A Flyback Resistor C Dump Converter Control.  

E-Print Network (OSTI)

??Switched Reluctance Machine (SRMs) are receiving significant attention for industries and homes in the last decade. Due to their rugged brushless design, high reliable and (more)

Huang, Yi-Wen

2005-01-01T23:59:59.000Z

345

Aspects of magnetisation and iron loss characteristics in switched-reluctance and permanent-magnet machines.  

E-Print Network (OSTI)

??In the first section, the magnetisation characteristics of the switched-reluctance motor are examined. Measurements have been carried out using both static and dynamic test methods. (more)

Walker, Jill Alison

2006-01-01T23:59:59.000Z

346

Development of Digital Signal Processor Based Drive System for Switched Reluctance Motor.  

E-Print Network (OSTI)

??The switched reluctance motor has the advantages of the low production cost, high operating efficiency, high stability, and high start torque. It can deliver a (more)

Wu, Chun-yen

2006-01-01T23:59:59.000Z

347

Development of Monitoring and Control System for Switched Reluctance Motor Drive System.  

E-Print Network (OSTI)

??The reluctance torque of switched reluctance motor could drive the rotor directly. Rotor doesnt need to be made from permanent magnet and the demagnetization and (more)

Wang, Yung-chin

2005-01-01T23:59:59.000Z

348

Implementation of a DSP-Based Hybrid Sensor for Switched Reluctance Motor Converter.  

E-Print Network (OSTI)

??The Switched Reluctance Motor (SRM) inherits a simple and reliable structure with an economical manufacturing cost. The DC power output supplies the unipolar converter to (more)

Chien, Huang-Chen

2008-01-01T23:59:59.000Z

349

Vibration and thermal analysis of 6 4 pole switched reluctance motor; -.  

E-Print Network (OSTI)

??Switched reluctance motors SRM rer gaining importance in the variable speed market due to their simple and rugged construction To designthe motor for higher performance (more)

Balamurugan, S

2014-01-01T23:59:59.000Z

350

Short flux paths optimize the efficiency of a 5-phase switched reluctance drive  

SciTech Connect

A new configuration of switched reluctance drive is proposed in which the windings of a 5-phase motor are configured to encourage short flux paths within the motor. The 5-phase prototype motor can be fed from a new power converter which uses only six switching devices in a shared switch configuration. Experimental results demonstrate that the 5-phase prototype achieves higher efficiency than prior arc switched reluctance and induction drives constructed in the same frame size, and with the benefit of the new electronic circuit it is very cost effective.

Michaelides, A.; Pollock, C. [Univ. of Warwick, Coventry (United Kingdom). Dept. of Engineering

1995-12-31T23:59:59.000Z

351

Switched reluctance motor drive circuit evaluation criteria for vehicle efficiency responsiveness.  

E-Print Network (OSTI)

??This thesis intends to examine the principles of operation for switched reluctance machines (SRM) and examine the power electronic drive circuits that control them, in (more)

Cunningham, John David

2011-01-01T23:59:59.000Z

352

Near-Infrared Electrochromic and Chiroptical Switching Materials: Design, Synthesis, and Characterization of Chiral Organogels  

E-Print Network (OSTI)

Near-Infrared Electrochromic and Chiroptical Switching Materials: Design, Synthesis regions have been realized using a low molecular weight gel as a chiral scaffold and electrochromic

Wan, Xin-hua

353

Sharp and fast: Sensors and switches based on polymer brushes with adsorption-active minority chains  

E-Print Network (OSTI)

We propose a design for polymer-based sensors and switches with sharp switching transition and fast response time. The switching mechanism involves a radical change in the conformations of adsorption-active minority chains in a brush. Such transitions can be induced by a temperature change of only about ten degrees, and the characteristic time of the conformational change is less than a second. We present an analytical theory for these switches and support it by self-consistent field calculations and Brownian dynamics simulations.

Leonid I. Klushin; Alexander M. Skvortsov; Alexey A. Polotsky; Shuanhu Qi; Friederike Schmid

2014-12-16T23:59:59.000Z

354

E-Print Network 3.0 - activation switch patch Sample Search Results  

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

patch Search Powered by Explorit Topic List Advanced Search Sample search results for: activation switch patch Page: << < 1 2 3 4 5 > >> 1 Enhancing Patching Performance Through...

355

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

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

scanning tunneling microscopy imaging and electronic structure theory, we investigate a single-molecule switch based on tunneling electron-driven rotation of a triangular Sc3N...

356

SEP Success Story: Louisiana Company Makes Switch to CNG, Helps Transform Local Fuel Supplies  

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

A Shreveport, Louisiana, company is switching to a locally-produced, cleaner source of fuel and helping other distribution fleets do the same. Learn more.

357

Stress-tolerant and temperature-stable RF MEMS capacitive switches and tunable filters  

E-Print Network (OSTI)

frequencies, the equivalent resistance and capacitance arehas a lower series equivalent resistance (R se ) compared toresistance of the switch were extracted from fitting the equivalent

Reines, Isak C.

2010-01-01T23:59:59.000Z

358

Cavity dumping versus stationary output coupling in repetitively Q-switched solid-state lasers  

Science Journals Connector (OSTI)

A comparative theoretical analysis of continuously pumped actively Q-switched solid-state lasers differing in output coupling methods (cavity dumping versus a partially transmitting...

Grishin, Mikhail

2011-01-01T23:59:59.000Z

359

Polnglish : Polish/English Code-Switching among Polish Immigrants in the USA.  

E-Print Network (OSTI)

??In the past twenty years the existence of a linguistic strategy, namely code-switching, among diverse immigrant communities has become the focus of frequent debates and (more)

Ulatowska, Anna M. (Anna Maria), 1982-

2013-01-01T23:59:59.000Z

360

A low cost ECL-bus multiplexer: bus switch  

Science Journals Connector (OSTI)

A fast low cost ECL differential bus multiplexer, Bus Switch (BS), has been constructed as a single CAMAC unit. It has been designed with two strobed 16-bit latches to capture and hold two 16-bit input ECL data words. Its design has foreseen the possibility of connecting 16-bit differential ECL outputs of many BS modules to the same bus. Its simplicity and flexibility make it a useful element for all kind of acquisition systems. It will be used, for example, in the first level trigger of the L3 experiment at LEP.

F. Cesaroni; E. Gennari; S. Gentile; P. Pacchiarotti

1987-01-01T23:59:59.000Z

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


361

Research on a novel Rotor Structure Switched Reluctance Motor  

Science Journals Connector (OSTI)

The paper proposes a novel switched reluctance motor with improved rotor structure, in which the segment core is embedded in aluminum rotor block in order to increase the mechanical strength and easy manufacturing as well as to improve the performance characteristics and reduce the vibration and acoustic noise. The effect of design parameters on the average torque is investigated using the finite element method. Comparison with conventional VR type SRM and segment type SRM without conductive metal construction rotor show the proposed novel SRM has advantages in the torque performances and the vibration and noise characteristics. The performance is also investigated by experiment.

Lingquan Zeng; Haiwei Yu

2012-01-01T23:59:59.000Z

362

A novel linear switched reluctance motor for railway transportation systems  

Science Journals Connector (OSTI)

This paper presents the design and realization of a new linear switched reluctance motor (LSRM) structure, especially suitable for high-speed railway systems. The new model has a double active stator configuration and provides high force for many applications with low cost. The characteristics of the LSRM are obtained by using finite element analysis (FEA) and analytical calculations. The results of the FEA and analytical calculations are presented, and compared with experimental results. In addition, a classical double-sided LSRM (DSLSRM) is modeled with the same specifications of the new motor structure and the results are compared.

Ferhat Daldaban; Nurettin Ustkoyuncu

2010-01-01T23:59:59.000Z

363

Multi-layer switched reluctance motor to reduce torque ripple  

Science Journals Connector (OSTI)

A new multi-layer switched reluctance motor (MSRM) having a high starting torque capability with reduced torque ripple and acoustic noise is presented. Measured data and the results of numerical analysis are given to evaluate the motor structure. In the numerical analysis, due to the highly nonlinear nature of the motor, finite element analysis (FEA) is employed. A prototype multi-layer SRM is built and tested in the experimental studies. The obtained test and simulation results show that the multi-layer motor structure has a smooth torque profile with high starting torque and less acoustic noise.

Ferhat Daldaban; Nurettin Ustkoyuncu

2008-01-01T23:59:59.000Z

364

Computer aided design of multi-phase switched reluctance motor  

Science Journals Connector (OSTI)

In this paper a comprehensive computer-aided design (CAD) procedure of multiphase switched reluctance motor (SRM) is presented. Better approach for calculation of the outer dimensions phase inductance flux linkage and losses and also a different concept for calculating the average torque of the motor are incorporated in the CAD program. The average torque is calculated based on the most effective 15 (for 8 ? 6 SRM) of the static torque profile of the motor. A sample design of a 5 hp SRM is presented in detail and the design is validated by conducting a two-dimensional finite element analysis of the motor.

N. K. Sheth; K. R. Rajagopal

2005-01-01T23:59:59.000Z

365

Co-scheduling of network resource provisioning and host-to-host bandwidth reservation on high-performance network and storage systems  

DOE Patents (OSTI)

A cross-domain network resource reservation scheduler configured to schedule a path from at least one end-site includes a management plane device configured to monitor and provide information representing at least one of functionality, performance, faults, and fault recovery associated with a network resource; a control plane device configured to at least one of schedule the network resource, provision local area network quality of service, provision local area network bandwidth, and provision wide area network bandwidth; and a service plane device configured to interface with the control plane device to reserve the network resource based on a reservation request and the information from the management plane device. Corresponding methods and computer-readable medium are also disclosed.

Yu, Dantong; Katramatos, Dimitrios; Sim, Alexander; Shoshani, Arie

2014-04-22T23:59:59.000Z

366

High bandwidth optical mount  

DOE Patents (OSTI)

An optical mount, which directs a laser beam to a point by controlling the position of a light-transmitting optic, is stiffened so that a lowest resonant frequency of the mount is approximately one kilohertz. The optical mount, which is cylindrically-shaped, positions the optic by individually moving a plurality of carriages which are positioned longitudinally within a sidewall of the mount. The optical mount is stiffened by allowing each carriage, which is attached to the optic, to move only in a direction which is substantially parallel to a center axis of the optic. The carriage is limited to an axial movement by flexures or linear bearings which connect the carriage to the mount. The carriage is moved by a piezoelectric transducer. By limiting the carriage to axial movement, the optic can be kinematically clamped to a carriage.

Bender, Donald A. (Dublin, CA); Kuklo, Thomas (Oakdale, CA)

1994-01-01T23:59:59.000Z

367

Length Scale of Leidenfrost Ratchet Switches Droplet Directionality  

SciTech Connect

Arrays of tilted pillars with characteristic heights spanning from hundreds of nanometers to tens of micrometers were created using wafer level processing and used as Leidenfrost ratchets to control droplet directionality. Dynamic Leidenfrost droplets on the ratchets with nanoscale features were found to move in the direction of the pillar tilt while the opposite directionality was observed on the microscale ratchets. This remarkable switch in the droplet directionality can be explained by varying contributions from the two distinct mechanisms controlling droplet motion on Leidenfrost ratchets with nanoscale and microscale features. In particular, asymmetric wettability of dynamic Leidenfrost droplets upon initial impact appears to be the dominant mechanism determining their directionality on tilted nanoscale pillar arrays. By contrast, asymmetric wetting does not provide a strong enough driving force compared to the forces induced by asymmetric vapour flow on arrays of much taller tilted microscale pillars. Furthermore, asymmetric wetting plays a role only in the dynamic Leidenfrost regime, for instance when droplets repeatedly jump after their initial impact. The point of crossover between the two mechanisms coincides with the pillar heights comparable to the values of the thinnest vapor layers still capable of cushioning Leidenfrost droplets upon their initial impact. The proposed model of the length scale dependent interplay between the two mechanisms points to the previously unexplored ability to bias movement of dynamic Leidenfrost droplets and even switch their directionality.

Agapov, Rebecca L [ORNL; Boreyko, Jonathan B [ORNL; Briggs, Dayrl P [ORNL; Srijanto, Bernadeta R [ORNL; Retterer, Scott T [ORNL; Collier, Pat [ORNL; Lavrik, Nickolay V [ORNL

2014-01-01T23:59:59.000Z

368

A modified split-supply switched-reluctance drive inverter  

SciTech Connect

This paper describes the application of a new simple voltage-boosting feature to split-supply SR (switched-reluctance) inverter. As its name implies, the SR motor always operates in switching mode and has distinct motoring and generating rotor angular regions. The effectiveness of the energy conversion process of SR motor depends basically on the ability of its inverter to inject adequate current during the positive-torque angular region and to reduce the current to negligible value during negative-torque angular region. The modified inverter effectively generates boost voltages for accelerating current build-up and decay and hence enhances the performance of SR drives. Benefits of the added boosting include: higher average current, better energy recovery during commutation and a wider feasible speed range. This paper will assess the implications of the boost feature on inverter cost and performance. A time-stepping simulation procedure which includes the modelling of current overlapping between phases will be presented together with simulation results.

Chan, S.; Omar, A.M. [Mara Inst. of Tech., Selangor (Malaysia). Dept. of Electrical Engineering

1995-12-31T23:59:59.000Z

369

A Beamline for Fast Polarization Switching at NSLS-II  

SciTech Connect

The first XUV beamline (200-2000 eV) at NSLS-II will have two branches, one optimized for photon hungry experiments requiring high coherent flux and one optimized for studies of polarization sensitive materials and interfaces based on fast polarization switching. We describe here the branch designed for fast polarization switching with frequencies up to 1 kHz, high photon flux, and good energy resolution. The beamline will be served by two canted undulators and is based on the focusing variable line spacing grating monochromator. The two beams will be focused at the same spot of approximately 80x10 {mu}m (hor.xver.). The expected circular polarized flux at the sample from each device up to 1.4 keV will be higher than 10{sup 12} photons/s at a resolving power better than 10{sup 4}. An additional KB focusing system will deliver the two beams to a spot in the {mu}m range.

Reininger, R.; Sanchez-Hanke, C.; Hulbert, S. L. [NSLS and NSLS-II, Brookhaven National Laboratory, Upton, New York 11973 (United States)

2010-06-23T23:59:59.000Z

370

Small-sized Mach-Zehnder Interferometer Optical Switch Using Thin Film Ge2Sb2Te5 Phase-change Material  

Science Journals Connector (OSTI)

Small-sized Mach-Zehnder Interferometer optical switch using Ge2Sb2Te5 thin films was fabricated. Two thin films of 1-?m-square were sufficient for switching. The switching...

Moriyama, Takumi; Kawashima, Hitoshi; Kuwahara, Masashi; Wang, Xiaomin; Asakura, Hideaki; Tsuda, Hiroyuki

371

Role of the FtsA C Terminus as a Switch for Polymerization and Membrane Association  

Science Journals Connector (OSTI)

...works as a switch triggered by ATP, a molecule that stores energy. This region contains an amphipathic helix that obstructs the...works as a switch triggered by ATP, a molecule that stores energy. This region contains an amphipathic helix that obstructs the...

Marcin Krupka; Elisa J. Cabr; Mercedes Jimnez; Germn Rivas; Ana Isabel Rico; Miguel Vicente

2014-12-01T23:59:59.000Z

372

Fully Integrated NxN MEMS Wavelength Selective Switch with 100% Colorless Add-Drop Ports  

E-Print Network (OSTI)

Fully Integrated NxN MEMS Wavelength Selective Switch with 100% Colorless Add-Drop Ports Shifu Yuan/drop ports. © 2007 Optical Society of America OCIS codes: (060.2330) Fiber optics communications; (060 multi-port wavelength selective switches using liquid crystal devices. Micro-Electro-Mechanical System

Bowers, John

373

An AWGR based Low-Latency Optical Switch for Data Centers and High Performance Computing Systems  

E-Print Network (OSTI)

i An AWGR based Low-Latency Optical Switch for Data Centers and High Performance Computing Systems based optical switch for data centers and high performance computing systems that builds upon several for Data Centers and High Performance Computing Systems ..i ABSTRACT .....................................

Kolner, Brian H.

374

Constructions and Analyses of Nonblocking WDM Switches Based on Arrayed Waveguide Grating and  

E-Print Network (OSTI)

(and heat dissipation) and large footprint (or space consump­ tion). As the optical device1 Constructions and Analyses of Nonblocking WDM Switches Based on Arrayed Waveguide Grating, qiao}@cse.buffalo.edu Abstract--- Constructing fast wavelength division multi­ plexing (WDM) switches

Ngo, Hung Q.

375

Effects of heat dissipation on unipolar resistance switching in Pt/NiO/Pt capacitors  

E-Print Network (OSTI)

Effects of heat dissipation on unipolar resistance switching in Pt/NiO/Pt capacitors S. H. Chang,1 151-747, Republic of Korea 3 School of Materials Science and Engineering, Seoul National University tBE and investigated their resistance switching behaviors. The capacitors with tBE 50 nm exhibited

Kahng, Byungnam

376

Modeling the choice to switch from fuelwood to electricity Implications for giant panda habitat conservation  

E-Print Network (OSTI)

was explained by demographic and electricity factors (price, voltage, and outage frequency). In addition, lowering electricity prices and increasing electricity quality would encourage local residents to switchANALYSIS Modeling the choice to switch from fuelwood to electricity Implications for giant panda

An, Li

377

Optical Arbitrary Waveform Generation Based Optical-Label Switching Transmitter with  

E-Print Network (OSTI)

Optical Arbitrary Waveform Generation Based Optical-Label Switching Transmitter with All-Optical, 95616 Email: sbyoo@ucdavis.edu Abstract: This paper introduces a modulation-format transparent optical-label switching transmitter based on optical arbitrary waveform generation. Packets consisting of 100 Gb

Kolner, Brian H.

378

Optical-Label Switching, MPLS, MPLambdaS and GMPLS S. J. B. Yoo  

E-Print Network (OSTI)

Optical-Label Switching, MPLS, MPLambdaS and GMPLS S. J. B. Yoo Department of Electrical), yoo@ece.ucdavis.edu ABSTRACT This paper discusses the new architecture and protocol of Optical characteristics of Optical-Label switching indicate its support of diverse QoS, CoS, and ToS services while

Kolner, Brian H.

379

Magnetic properties and switching volumes of nanocrystalline SmFeSiC films  

SciTech Connect

Systematic studies of the effects of Si addition on the magnetic and magnetization reversal properties of SmFeSiC films are presented. The magnetic switching volume and other magnetic parameters (e.g., coercivity) are strongly dependent upon the Si content. Correlations between switching volume, coercivity, and the intergrain interactions are discussed. {copyright} {ital 1997 American Institute of Physics.}

Zhang, S.Y. [State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, Peoples Republic of (China)] [State Key Laboratory of Magnetism, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, Peoples Republic of (China); Shan, Z.S.; Liu, Y. [Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0113 (United States)] [Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0113 (United States); Zhao, T.Y.; Zhao, J.G.; Shen, B.G.; Zhan, W.S. [Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, Peoples Republic of (China)] [Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, Peoples Republic of (China); Sellmyer, D.J. [Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0113 (United States)] [Center for Materials Research and Analysis, University of Nebraska, Lincoln, Nebraska 68588-0113 (United States)

1997-04-01T23:59:59.000Z

380

Lumped thermal model for switched reluctance motor applied to mechanical design optimization  

Science Journals Connector (OSTI)

Switched reluctance motors (SRM) are attracting much attention because of their special advantages. Generated heat, due to losses, can reduce the life time of SRMs. Therefore, taking into account thermal modeling helps to improve their performance and ... Keywords: Conduction, Convection, Motor losses, Optimal design, Switched reluctance motor, Thermal equivalent circuit

Hossein Rouhani; Jawad Faiz; Caro Lucas

2007-03-01T23:59:59.000Z

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


381

A complete and novel sensorless method for rotor position sensing in switched reluctance motor drives  

Science Journals Connector (OSTI)

This paper presents a complete and novel method which is designed to detect the rotor position at standstill and also low speeds in switched reluctance motor. The method applies a high frequency sine wave signal to the three successive stator pole windings ... Keywords: indirect rotor, position sensing in SRM, sensorless operation of SRM, switch reluctance motor

E. Afjei; M. M. Nezamabadi; A. Javeh

2005-07-01T23:59:59.000Z

382

FPGA based neural network position and speed estimator for switched reluctance motor drive  

Science Journals Connector (OSTI)

This paper presents the design and implementation of the sensorless control system for the Switched Reluctance Motor (SRM) drive without a position sensor. The SRM has been receiving attention for industry applications due to its low cost in mass production, ... Keywords: position estimation, resistance estimation, switched reluctance motor

Jakub Talla; Josef Stehlik

2008-12-01T23:59:59.000Z

383

Harmony Optimization of Physical Design and Control Strategy of Switched Reluctance Motor  

Science Journals Connector (OSTI)

Vibration and acoustic noise are the important reasons for switched reluctance motor to be unacceptable in variable speed drive market. To optimize the physical structure of the motor and to choose the appropriate control strategies are the two conventional ... Keywords: control strategy, switched reluctance motor, physical design, harmony optimization

Jie Li; Boya Sun; Shurui Fan; Lin He

2009-11-01T23:59:59.000Z

384

High-Performance Torque Control for Switched Reluctance Motor Based on Online Fuzzy Neural Network Modeling  

Science Journals Connector (OSTI)

A novel high performance torque control scheme for switched reluctance motors(SRMs) is proposed based on online fuzzy neural network modeling and adaptive sliding-mode current control. Firstly, an adaptive neural fuzzy inference system(ANFIS) is designed ... Keywords: switched reluctance motor, torque control, adaptive neural fuzzy inference system, adaptive sliding mode control

Xuelian Yao; Ruiyun Qi; Zhiquan Deng; Jun Cai

2010-10-01T23:59:59.000Z

385

Fuzzy Parameters Self-Tuning PID Control of Switched Reluctance Motor Based on Simulink/NCD  

Science Journals Connector (OSTI)

In this paper, the quasi-linear model of switched reluctance motor brought forward by Miller is analyzed in detail. On the basis of it, the small-signal dynamic model of switched reluctance motor is built based on matlab/simulink environment. PID control ...

Shoujun Song; Weiguo Liu

2006-11-01T23:59:59.000Z

386

Optimization of Switched Reluctance Motor for Efficiency Improvement Using Response Surface Model and Kriging Model  

Science Journals Connector (OSTI)

This paper presented an optimization of switched reluctance motor for higher efficiency. The motor in this study was designed based on the magnetic energy conversion loop according to the power requirements of application system. It's found that besides ... Keywords: switched reluctance motor, optimziation, RSM, Kriging Model

Xueguan Song; Youngchul Park; Jian Li; Joonho Lee

2011-04-01T23:59:59.000Z

387

Simulation Research on Switched Reluctance Motor Modeling and Control Strategy Based on ANSOFT  

Science Journals Connector (OSTI)

Based on ANSOFT software, the 2d and 3d finite element models of switch reluctance motor were established, the dynamic simulations on the switch reluctance motor finite element models were researched by different control strategies. The accuracy and ... Keywords: SRM, Ansoft, the finite element, simulation

Yuelun Ling; Mianhua Wang; Yan Wang; Fenli Wang

2010-03-01T23:59:59.000Z

388

Millisecond switching in solid state electrochromic polymer devices fabricated from ionic self-assembled multilayers  

E-Print Network (OSTI)

Millisecond switching in solid state electrochromic polymer devices fabricated from ionic self The electrochromic switching times of solid state conducting polymer devices fabricated by the ionic self shown to decrease with the active area of the electrochromic device suggesting that even faster

Heflin, Randy

389

Solid-State Gadolinium-Magnesium Hydride Optical Switch R. Armitage  

E-Print Network (OSTI)

-state electrochromic device. With positive polarization of the hydride electrode, the visible reflectance approaches 35 and reflecting states. Keywords: gadolinium-magnesium; electrochromic hydride; optical switching device. 2 #12;A conventional electrochromics5 . Optical switching has also been demonstrated by varying the H content

390

Increasing output energy from a passively Q-switched Er:glass laser  

E-Print Network (OSTI)

designators, laser range finders, wind metrology, LIDARs, and communication [8­10]. Passive Q- switches have many advantages over active ones. These include low cost, compact size and weight, robustness, and high are passively Q-switched, only the lowest spatial mode can develop. Attempts to increase the pump power in order

Friesem, Asher A.

391

Integration of planar transformer and/or planar inductor with power switches in power converter  

DOE Patents (OSTI)

A power converter integrates at least one planar transformer comprising a multi-layer transformer substrate and/or at least one planar inductor comprising a multi-layer inductor substrate with a number of power semiconductor switches physically and thermally coupled to a heat sink via one or more multi-layer switch substrates.

Chen, Kanghua (Canton, MI); Ahmed, Sayeed (Canton, MI); Zhu, Lizhi (Canton, MI)

2007-10-30T23:59:59.000Z

392

Single ultrafast diffusive conduction based optoelectronic switch for multi-channel operation  

E-Print Network (OSTI)

Single ultrafast diffusive conduction based optoelectronic switch for multi-channel operation Fatih to multi-channel operation, including Green's function diffusive conduction solution and crosstalk conduction based optoelectronic switches that accommodate >100 optical channels (with 2,000mm-2 channel

Miller, David A. B.

393

Cladding-pumped Er/Yb co-doped Q-switched all fiber laser  

Science Journals Connector (OSTI)

A compact Q-switched laser based on Er/Yb co-doped fiber is demonstrated. Operating in repetition rate of 10-100 kHz and Q-switching window time of 100 ns to 2 microseconds, the...

Zhao, Chongguang; Liu, Yang; Wang, Ji; Wang, Lijun

2007-01-01T23:59:59.000Z

394

ATLAS II: Optimizing a 10Gbps SingleChip ATM Switch Dionisios Pnevmatikatos and George Kornaros  

E-Print Network (OSTI)

ATLAS II: Optimizing a 10Gbps Single­Chip ATM Switch Dionisios Pnevmatikatos and George Kornaros, Heraklio, Crete, GR­711­10 GREECE fpnevmati,kornarosg@ics.forth.gr Abstract We describe ATLAS II, an optimized version of the ATLAS I ATM switch. While in ATLAS I we concentrated on cor­ rectness, in ATLAS II

Markatos, Evangelos P.

395

An iterated sample construction with path relinking method: Application to switch allocation in electrical distribution networks  

Science Journals Connector (OSTI)

We present a metaheuristic approach which combines constructive heuristics and local searches based on sampling with path relinking. Its effectiveness is demonstrated by an application to the problem of allocating switches in electrical distribution ... Keywords: Metaheuristics, Path relinking, Power systems reliability, Sample algorithms, Switch allocation

Alexander J. Benavides; Marcus Ritt; Luciana S. Buriol; Paulo M. FranA

2013-01-01T23:59:59.000Z

396

Parasol and GreenSwitch: Managing Datacenters Powered by Renewable Energy  

E-Print Network (OSTI)

Parasol and GreenSwitch: Managing Datacenters Powered by Renewable Energy ´I~nigo Goiri, William the renewable energy supply. For highest benefits, green datacenter operators must intelligently manage with Parasol, GreenSwitch, and MapReduce workloads demonstrate that intelligent workload and energy source

397

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

E-Print Network (OSTI)

Frame-Scheduling for Input-Queued Switches with Energy Reconfiguration Costs Andrea Bianco, Paolo problems, mainly due to thermal issues that require complex cooling systems and to increasing energy costs scheduler determines a switching fabric configuration to transfer packets. We consider the energy

398

Impact of Photonic Switch Radix on Realizing Optical Interconnection Networks for Exascale Systems  

E-Print Network (OSTI)

power consumption. Several challenges still need to be addressed, for instance, achieving energy of programmability, resilience, power consumption and cost. Incremental evolutions of existing platforms may-stage architecture to obtain a virtual high port count switch, forming an indirect network. Alternatively, switches

Bergman, Keren

399

U-108: Net4Switch ipswcom ActiveX Control Buffer Overflow Vulnerability |  

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

8: Net4Switch ipswcom ActiveX Control Buffer Overflow 8: Net4Switch ipswcom ActiveX Control Buffer Overflow Vulnerability U-108: Net4Switch ipswcom ActiveX Control Buffer Overflow Vulnerability February 22, 2012 - 8:00am Addthis PROBLEM: A vulnerability was reported in Net4Switch ipswcom ActiveX Control, which can be exploited by malicious people to compromise a user's system. PLATFORM: Net4Switch ipswcom ActiveX Control 1.x ABSTRACT: The vulnerability is caused due to a boundary error within the "CxDbgPrint()" function (cxcmrt.dll) when creating a debug message string. reference LINKS: Vendor Advisory Secunia Advisroy 48125 No CVE references. IMPACT ASSESSMENT: High Discussion: The vulnerability is caused due to a boundary error within the "CxDbgPrint()" function (cxcmrt.dll) when creating a debug message string.

400

Fast deterministic switching in orthogonal spin torque devices via the control of the relative spin polarizations  

SciTech Connect

We model 100 ps pulse switching dynamics of orthogonal spin transfer (OST) devices that employ an out-of-plane polarizer and an in-plane polarizer. Simulation results indicate that increasing the spin polarization ratio, C{sub P}?=?P{sub IPP}/P{sub OPP}, results in deterministic switching of the free layer without over-rotation (360 rotation). By using spin torque asymmetry to realize an enhanced effective P{sub IPP}, we experimentally demonstrate this behavior in OST devices in parallel to anti-parallel switching. Modeling predicts that decreasing the effective demagnetization field can substantially reduce the minimum C{sub P} required to attain deterministic switching, while retaining low critical switching current, I{sub p}???500??A.

Park, Junbo; Buhrman, R. A. [Cornell University, Ithaca, New York 14853 (United States)] [Cornell University, Ithaca, New York 14853 (United States); Ralph, D. C. [Cornell University, Ithaca, New York 14853 (United States) [Cornell University, Ithaca, New York 14853 (United States); Kavli Institute at Cornell, Ithaca, New York 14853 (United States)

2013-12-16T23:59:59.000Z

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


401

Investigation of a selective switching device using a phase-change material for a 3-dimensional PCRAM array  

Science Journals Connector (OSTI)

A selective switching device utilizing a phase-change material was investigated. In this work, we ... selective switching and memory operation in a multiple phase-change memory with only phase-change materials wi...

Jung Min Lee; Yun-Heub Song; Yuta Saito

2013-05-01T23:59:59.000Z

402

A Low Latency Optical Top of Rack Switch for Data Centre Networks with Minimized Processor Energy Load  

Science Journals Connector (OSTI)

We propose a low latency optical data center top of rack switch using recirculation buffering and a hybrid MZ/SOA switch architecture to reduce the network power dissipated on future...

Liu, Shiyun; Cheng, Qixiang; Wonfor, Adrian; Penty, Richard V; White, Ian; Watts, Philip M

403

Design low losses 6/8 switched reluctance motor  

Science Journals Connector (OSTI)

The magnetic circuit of the conventional 6/8 switched reluctance motor (SRM) is re-designed to minimise the losses. The flux loops are shortened by making each two stator teeth incorporated in one magnetic circuit only. Subsequently, the flux does not flow in all parts of the stator yoke. The unused iron sections do not produce iron losses. Now, the stator consists of three separated sections which are fixed inside a non-magnetic cylinder. The copper losses also are decreased because less copper windings are used to produce the same amount of the output torque as the flux paths become short then the flux density increases. Analysis and comparison of the 6/8 SRM before and after the re-design process are presented. MATLAB/Simulink software is used to simulate the dynamic performance.

Eyhab El-Kharashi

2013-01-01T23:59:59.000Z

404

Flux-linkage characteristics of switched reluctance motor  

SciTech Connect

An important requirement in modeling of switched reluctance motor (SRM) is the knowledge of its flux-linkage characteristics. Idealization of the flux-linkage characteristics will result in a model which cannot predict the performance of the machine with sufficient accuracy. It is necessary therefore to determine flux-linkage characteristics as closely as possible. In this paper, the method of finding the flux-linkage characteristics is explained. The same is demonstrated on a commercially available 4 KW, 8/6 pole OULTON SRM. The validity of the test result is checked by computing the static torque characteristics based on the measured flux-linkage characteristics and comparing it with the experimentally measured static torque characteristics. The sources of measurement error are discussed.

Ramanarayanan, V.; Venkatesha, L.; Panda, D. [Indian Inst. of Science, Bangalore (India). Dept. of Electrical Engineering

1995-12-31T23:59:59.000Z

405

Development of a Switched Reluctance Motor made of Permendur  

Science Journals Connector (OSTI)

A switched reluctance (SR) motor consists of stator and rotor cores, and windings. Both the stator and rotor have salient poles. The stator has concentrated windings on each salient pole. On the other hand, the rotor has no windings and no permanent magnets. Therefore, the SR motor is a low cost, extremely robust, and wide-range variable-speed motor. The performance of the SR motor greatly depends on magnetic properties of core material since it consists of only iron cores and windings. This paper presents the development of a novel SR motor made of permendur which has extremely high saturation flux density and very low core loss. Two types of SR motors, one is made of conventional non-oriented Si steel, the other is made of permendur, are compared by simulation and experiment. It is demonstrated that the torque of the SR motor made of permendur is greater than that of the conventional Si steel by 20%.

Y Hasegawa; K Nakamura; O Ichinokura

2011-01-01T23:59:59.000Z

406

Electrically switched cesium ion exchange. FY 1996 annual report  

SciTech Connect

An electrochemical method for metal ion separations, called Electrically Switched Ion Exchange, is described. Direct oxidation and reduction of an electroactive film attached to an electrode surface is used to load and unload the film with alkali metal cations. The electroactive films under investigation are Ni hexacyanoferrates, which are deposited on the surface by applying an anodic potential to a Ni electrode in a solution containing the ferricyanide anion. Reported film preparation procedures were modified to produce films with improved capacity and stability. Electrochemical behavior of the derivatized electrodes were investigated using cyclic voltammetry and chronocoulometry. The films show selectivity for Cs in concentrated sodium solutions. Raman spectroscopy was used to monitor changes in oxidation state of the film and imaging experiments have demonstrated that the redox reactions are spatially homogenous across the film. Requirements for a bench scale unit were identified.

Lilga, M.A.; Orth, R.J.; Sukamto, J.P.H. [Pacific Northwest National Lab., Richland, WA (United States); Schwartz, D.T.; Haight, S.M. [Washington Univ., Seattle, WA (United States); Genders, D. [Electrosynthesis Co., Inc., Cheektowaga, NY (United States)

1996-12-01T23:59:59.000Z

407

275 C Downhole Switched-Mode Power Supply  

SciTech Connect

A vee-square (V2) control based controller IC is developed for a switch mode power supply capable of operating at extreme temperature/harsh environment conditions. A buck type regulator with silicon carbide power junction field effect transistors (JFET) as power devices is used to analyze the performance of controller. Special emphases are made on the analog sub-blocks--voltage reference, operational transconductance amplifier and comparator as individual building blocks. Transformer coupled gate drives and high temperature operable magnetic cores and capacitors are identified and tested for use in the design. Conventional ceramic chip packaging of ICs combined with lead carrier type mounting of passive filter components is introduced for hybrid packaging of the complete product. The developed SMPS is anticipated to support the operation of down-hole microcontrollers and other electronics devices that require low/medium power filtered dc inputs over an operating temperature of 275 C.

Chris Hutchens; Vijay Madhuravasal

2008-08-31T23:59:59.000Z

408

High gain photoconductive semiconductor switch having tailored doping profile zones  

DOE Patents (OSTI)

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.

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

409

E-beam high voltage switching power supply  

DOE Patents (OSTI)

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

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

1996-01-01T23:59:59.000Z

410

E-beam high voltage switching power supply  

DOE Patents (OSTI)

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

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

1996-10-15T23:59:59.000Z

411

Effect of electronic reconstruction on cuprate-manganite spin switches.  

SciTech Connect

We examine the anomalous inverse spin switch behavior in La{sub 0.7}Ca{sub 0.3}MnO{sub 3}(LCMO)/YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} (YBCO)/LCMO trilayers by combined transport studies and polarized neutron reflectometry. Measuring magnetization profiles and magnetoresistance in an in-plane rotating magnetic field, we prove that, contrary to many accepted theoretical scenarios, the relative orientation between the two LCMO's magnetizations is not sufficient to determine the magnetoresistance. Rather the field dependence of magnetoresistance is explained by the interplay between the applied magnetic field and the (exponential tail of the) induced exchange field in YBCO, the latter originating from the electronic reconstruction at the LCMO/YBCO interfaces.

Liu, Y.; Visani, C.; Nemes, N. M.; Fitzsimmons, M. R.; Zhu, L. Y.; Tornos, J.; Zhernenkov, M.; Hoffmann, A.; Leon, C.; Santamaria, J.; te Velthuis, S. G. E. (Materials Science Division); (Universidad Complutense de Madrid); (LANL)

2012-01-01T23:59:59.000Z

412

Fuel switch could bring big savings for HECO Liquefied natural gas beats low-sulfur oil in cost and equipment  

E-Print Network (OSTI)

Fuel switch could bring big savings for HECO Liquefied natural gas beats low-sulfur oil in cost gas instead of continuing to burn low-sulfur fuel oil, a report said. Switching to liquefied natural who switch from gasoline-powered vehicles to ones fueled by compressed natural gas could save as much

413

Comparative Studies of All-Optical vs. Electrical vs. Hybrid Switches in Datacom and in Telecom Networks  

E-Print Network (OSTI)

Comparative Studies of All-Optical vs. Electrical vs. Hybrid Switches in Datacom and in Telecom switches. 2. Telecom Switches: optical vs. electrical vs. hybrid In the national and global telecom Networks Xiaohui Ye, Venkatesh Akella, and S. J. B. Yoo Department of Electrical and Computer Engineering

Kolner, Brian H.

414

IEEE TRANSACTIONS ON MAGNETICS, VOL. 49, NO. 4, APRIL 2013 1493 Comparison of Complementary and Modular Linear Flux-Switching  

E-Print Network (OSTI)

mover length. Index Terms--Complementary and modular, flux-switching permanent magnet motor, linear and Modular Linear Flux-Switching Motors With Different Mover and Stator Pole Pitch Ruiwu Cao , Ming Cheng], flux reversal permanent magnet (FRPM) motors [12], and flux-switching permanent magnet (FSPM) motors

Mi, Chunting "Chris"

415

Abstract--A linear and a rotational switched reluctance drive with a large airgap are developed and manufactured  

E-Print Network (OSTI)

) and the linear switched reluctance motor (LSRM). Unlike the LIM [2], the LSRM has not been investigated as a railway propulsion system so far. Switched reluctance motors generally offer a very simple and robustAbstract--A linear and a rotational switched reluctance drive with a large airgap are developed

Paderborn, Universität

416

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 15, NO. 3, MAY 2000 545 A Self-Tuning Controller for Switched  

E-Print Network (OSTI)

for Switched Reluctance Motors Krzysztof Russa, Iqbal Husain, Senior Member, IEEE, and Malik E. Elbuluk, Senior Member, IEEE Abstract--A self-tuning controller for switched reluctance motors is presented. A torque are presented to validate the self-tuning algorithm. Index Terms--Self-timing controller, switched reluctance

Husain, Iqbal

417

3252 IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 54, NO. 12, DECEMBER 2007 Silicon Germanium CMOS Optoelectronic Switching  

E-Print Network (OSTI)

Optoelectronic Switching Device: Bringing Light to Latch Ali K. Okyay, Student Member, IEEE, Duygu Kuzum, Student. Saraswat, Fellow, IEEE Abstract--We propose a novel semiconductor optoelectronic (OE) switch--Germanium, integrated optoelectronics, metal­ oxide­semiconductor field-effect transistor (MOSFET) switches, optical

Miller, David A. B.

418

catalystRX Chem 115Myers  

E-Print Network (OSTI)

%) MeO2C H3C CH3 CH3 iPr iPr iPr P Buchwald, S.L.; Naber, J.R. Adv. Synth. Catal. 2008, 350, 957-961 N N

419

Theoretical modeling and analysis of mechanical impact driven and frequency up-converted piezoelectric energy harvester for low-frequency and wide-bandwidth operation  

Science Journals Connector (OSTI)

Abstract Vibration energy harvesters are capable of generating significant amount of power at higher frequencies rather than generating at low frequencies. Moreover, as low frequency vibrations (130Hz) around the ambient environment are discursive in nature, resonance based power generators are limited to use within this low frequency range. In this paper, a mechanical impact driven and frequency up-converted wide-bandwidth piezoelectric vibration energy harvester has been proposed and demonstrated theoretically and experimentally. It converts low frequency environmental vibrations into high frequency vibration by mechanical impact. A low frequency flexible driving beam with horizontally extended tip mass, upon excitation, hits two high frequency rigid piezoelectric generating beams at the same time causing a change in the driving beam's effective stiffness that allows the device to offer approximately 180% increased ?3dB bandwidth and more than 62% of the maximum power generation within the remaining operating frequency range as well. The overall bandwidth is 7.5Hz within 714.5Hz frequency range generating a minimum peak power of 233?W. A maximum of 378?W peak power from one generating beam is achieved under 6ms?2 acceleration at the resonant frequency of 14.5Hz. Output of both generating beams connected in series produces 734?W peak power under the same operating condition with the corresponding power density 38.8?Wcm?3. The experimental results show some discrepancy with the theoretical results due to mechanical loss during impact and the process variations in the beam formation and assembling. The theoretical and experimental results reveal that the proposed configuration has the potential of powering small portable, handheld wireless smart devices from low frequency, specially human motion related vibrations.

Miah A. Halim; Jae Y. Park

2014-01-01T23:59:59.000Z

420

Ionic field effect and memristive phenomena in single-point ferroelectric domain switching  

SciTech Connect

Electric field induced polarization switching underpins most functional applications of ferroelectric materials in information technology, materials science, and optoelectronics. In the last 20 years, much attention has been focused on the switching of individual domains using scanning probe microscopy, both as model of ferroelectric data storage and approach to explore fundamental physics of ferroelectric switching. The classical picture of tip induced switching includes formation of cylindrical domain oriented along the tip field, with the domain size is largely determined by the tip-induced field distribution and domain wall motion kinetics. The polarization screening is recognized as a necessary precondition to the stability of ferroelectric phase; however, screening processes are generally considered to be uniformly efficient and not leading to changes in switching behavior. Here, we demonstrate that single-point tip-induced polarization switching can give rise to a surprisingly broad range of domain morphologies, including radial and angular instabilities. These behaviors are traced to the surface screening charge dynamics, which in some cases can even give rise to anomalous switching against the electric field (ionic field effect). The implications of these behaviors for ferroelectric materials and devices are discussed.

Ievlev, Anton [ORNL] [ORNL; Morozovska, A. N. [National Academy of Science of Ukraine, Kiev, Ukraine] [National Academy of Science of Ukraine, Kiev, Ukraine; Eliseev, E. A. [National Academy of Science of Ukraine, Kiev, Ukraine] [National Academy of Science of Ukraine, Kiev, Ukraine; Shur, Vladimir Ya. [Ural Federal University, Russia] [Ural Federal University, Russia; Kalinin, Sergei V [ORNL] [ORNL

2014-01-01T23:59:59.000Z

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


421

Uniqueness of Viscosity Solutions for Optimal Multi-Modes Switching Problem with Risk of default  

E-Print Network (OSTI)

In this paper we study the optimal m-states switching problem in finite horizon as well as infinite horizon with risk of default. We allow the switching cost functionals and cost of default to be of polynomial growth and arbitrary. We show uniqueness of a solution for a system of m variational partial differential inequalities with inter-connected obstacles. This system is the deterministic version of the Verification Theorem of the Markovian optimal m-states switching problem with risk of default. This problem is connected with the valuation of a power plant in the energy market.

Asri, Brahim El

2012-01-01T23:59:59.000Z

422

Differential ultrafast all-optical switching of the resonances of a micropillar cavity  

SciTech Connect

We perform frequency- and time-resolved all-optical switching of a GaAs-AlAs micropillar cavity using an ultrafast pump-probe setup. The switching is achieved by two-photon excitation of free carriers. We track the cavity resonances in time with a high frequency resolution. The pillar modes exhibit simultaneous frequency shifts, albeit with markedly different maximum switching amplitudes and relaxation dynamics. These differences stem from the non-uniformity of the free carrier density in the micropillar, and are well understood by taking into account the spatial distribution of injected free carriers, their spatial diffusion and surface recombination at micropillar sidewalls.

Thyrrestrup, Henri, E-mail: h.t.nielsen@utwente.nl; Yce, Emre; Ctistis, Georgios; Vos, Willem L. [Complex Photonic Systems (COPS), MESA Institute for Nanotechnology, University of Twente, 7500 AE Enschede (Netherlands); Claudon, Julien; Grard, Jean-Michel, E-mail: jean-michel.gerard@cea.fr [University Grenoble Alpes, INAC-SP2M, Nanophysics and Semiconductors Lab, F-38000 Grenoble (France); CEA, INAC-SP2M, Nanophysics and Semiconductors Lab, F-38000 Grenoble (France)

2014-09-15T23:59:59.000Z

423

Combined Flux Compression and Plasma Opening Switch on the Saturn Pulsed Power Generator  

Science Journals Connector (OSTI)

A wire-array flux-compression cartridge installed on Sandias Saturn pulsed power generator doubled the current into a 3-nH load to 6MA and halved its rise time to 100ns. The current into the load, however, was unexpectedly delayed by almost 1???s. Estimates of a plasma flow switch acting as a long-conduction-time opening switch are consistent with key features of the power compression. The results suggest that microsecond-conduction-time plasma flow switches can be combined with flux compression both to amplify currents and to sharpen pulse rise times in pulsed power drivers.

Franklin S. Felber; Eduardo M. Waisman; Michael G. Mazarakis

2010-05-04T23:59:59.000Z

424

Effects of graphene on electro-optic switching and spontaneous polarization of a ferroelectric liquid crystal  

SciTech Connect

A small quantity of graphene flakes was doped in a ferroelectric liquid crystal (FLC), and the field-induced ferroelectric electro-optic switching was found to be significantly faster in the FLC + graphene hybrid than that of the pure FLC. Further studies revealed that the suspended graphene flakes enhanced the FLC's spontaneous polarization by improving smectic-C ordering resulting from the ?? electron stacking, and reduced rotation viscosity by trapping some of the free ions of the FLC media. These effects coherently impacted the FLC-switching phenomenon, enabling the FLC molecules to switch faster on reversing an external electric field.

Basu, Rajratan, E-mail: basu@usna.edu [Department of Physics, Soft-matter and Nanomaterials Laboratory, The United States Naval Academy, Annapolis, Maryland 21402 (United States)

2014-09-15T23:59:59.000Z

425

Enhancement of switching speed by laser-induced clustering of nanoparticles in magnetic fluids  

SciTech Connect

The switching speed of magnetic fluids was investigated by using laser light of different power densities as well as incandescent light. It was found that the switching speed exhibited a strong dependence on incident power density and there existed an optimum value at which the fastest switching operation was achieved. In addition, it was revealed that the clustering of magnetic nanoparticles, which became resolved at large power densities, resulted in a rapid agglomeration of nanoparticles when a magnetic field was applied. It is suggested that the optical trapping force of the laser beam is responsible for the formation of clusters.

Deng Haidong [Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, Guangdong 510006 (China); College of Science, South China Agricultural University, Guangzhou, Guangdong 510642 (China); Liu Jin; Lin Xusheng; Sun Ting; Dai Qiaofeng; Wu Lijun; Lan Sheng [Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou, Guangdong 510006 (China); Zhao Weiren; Zhang Wei [College of Science and Technology Engineering, Guangdong University of Technology, Guangzhou, Guangdong 510006 (China); Gopal, Achanta Venu [DCMP and MS, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India)

2008-06-09T23:59:59.000Z

426

Observation of rebirth of metallic paths during resistance switching of metal nanowire  

SciTech Connect

To clarify the mechanism of resistance-switching phenomena, we have investigated the change in the electronic structure of a Ni nanowire device during resistance-switching operations using scanning photoelectron microscopy techniques. We directly observed the disappearance of density of state (DOS) at the Fermi level (E{sub F}) in a high-resistance state and recovery of a finite DOS at E{sub F} in a low-resistance state. These results are direct evidence that the Ni nanowire is fully oxidized after switching to the high-resistance state and that Ni-metal conductive paths in the oxidized nanowire are recovered in the low-resistance state.

Horiba, K., E-mail: horiba@post.kek.jp; Nagamura, N.; Toyoda, S.; Oshima, M. [Department of Applied Chemistry, The University of Tokyo, Tokyo 113-8656 (Japan) [Department of Applied Chemistry, The University of Tokyo, Tokyo 113-8656 (Japan); Synchrotron Radiation Research Organization, The University of Tokyo, Tokyo 113-8656 (Japan); Fujiwara, K.; Takagi, H. [RIKEN Advanced Science Institute, Saitama 351-0198 (Japan)] [RIKEN Advanced Science Institute, Saitama 351-0198 (Japan); Kumigashira, H. [Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Ibaraki 305-0801 (Japan) [Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Ibaraki 305-0801 (Japan); Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama 332-0012 (Japan)

2013-11-04T23:59:59.000Z

427

Influence of different illumination profiles on the on-state resistances of silicon carbide photoconductive semiconductor switches  

SciTech Connect

Characteristics of a silicon-carbide (SiC) photoconductive switch under different illumination profiles are presented. We triggered a V-doped semi-insulated 6H-SiC switch with lateral geometry using a laser beam of 532-nm wavelength. Photoconductivity tests for different spot profiles and locations show that such switches achieve a minimum on-state resistance when the switching gap is illuminated. The differences between on-state resistances are small for various partial illuminations of the switching gap. Semiconductor modeling is used to simulate the electric field and current profiles for different partial illuminations. The simulation results show poor on-state switch performance when partially illuminated. Based on these results, a more revealing circuit model for the switch matches well with experimental results for partial illuminations.

Wang, Langning, E-mail: wanglangning@126.com; Xun, Tao; Yang, Hanwu; Liu, Jinliang; Zhang, Yu [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)] [College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)

2014-04-15T23:59:59.000Z

428

IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 19, NO. 2, MARCH 2004 363 A Passive Soft-Switching Snubber for PWM Inverters  

E-Print Network (OSTI)

-Switching Snubber for PWM Inverters Fang Z. Peng, Senior Member, IEEE, Gui-Jia Su, Senior Member, IEEE, and Leon M for pulse-width modulation (PWM) inverters to achieve soft-switching purposes without significant cost for each switching device in an inverter to provide low dv/dt and low switching losses to the device

Tolbert, Leon M.

429

Slideshow: Flipping the Switch on LED Lighting for the National Mall |  

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

Slideshow: Flipping the Switch on LED Lighting for the National Slideshow: Flipping the Switch on LED Lighting for the National Mall Slideshow: Flipping the Switch on LED Lighting for the National Mall January 31, 2012 - 3:05pm Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said

430

Artificial molecules that switch "handedness" at light-speed  

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

Artificial molecules that switch "handedness" Artificial molecules that switch "handedness" Artificial molecules that switch "handedness" at light-speed Researchers create the first artificial molecules whose chirality can be rapidly switched from a right-handed to a left-handed orientation with a beam of light. July 10, 2012 Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy sources, to plasma physics and new materials. Los Alamos National Laboratory sits on top of a once-remote mesa in northern New Mexico with the Jemez mountains as a backdrop to research and innovation covering multi-disciplines from bioscience, sustainable energy

431

Slideshow: Flipping the Switch on LED Lighting for the National Mall |  

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

Slideshow: Flipping the Switch on LED Lighting for the National Slideshow: Flipping the Switch on LED Lighting for the National Mall Slideshow: Flipping the Switch on LED Lighting for the National Mall January 31, 2012 - 3:05pm Addthis 1 of 8 Facing East toward the Capitol Building, LED retrofitted lights line the interior paths of the mall while preserving the architectural integrity of the original fixtures. Image: Energy Department Image | Photo by Quentin Kruger (Contractor) | Public Domain Date taken: 2012-01-30 06:00 2 of 8 Energy Secretary Steven Chu discusses the 65% savings on electric bills and lowered maintenance costs the National Parks Service is experiencing by switching to energy efficient LED lights. "Using energy-efficient LED light bulbs is an important way Americans can save money by saving energy," said

432

Microsoft Word - CX-MountainAvenueSwitchesFY12_WEB.doc  

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

REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Joan Kendall Realty Specialist - TERR-3 Proposed Action: Disposition of Mountain Avenue Tap Line Sectionalizing Switches Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): Appendix B1.24 Property transfers Location: Jackson County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA is proposing to transfer ownership of two line sectionalizing switches to PacifiCorp. The switches, 2R247 and 2R248, are located on PacifiCorp's Oak Knoll-Ashland 115-kV transmission line at the tap point for the Mountain Avenue Tap. Ownership of these switches will provide PacifiCorp more control over future

433

MEMS Switches Are XS in Size, XXL in Power | GE Global Research  

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

Last week we gave you a glimpse into how we make these metal MEMS devices in a cleanroom. We fabricate these metal MEMS switches on silicon wafers for applications that...

434

Structural Determinants for Naturally Evolving H5N1 Hemagglutinin to Switch Its Receptor Specificity  

E-Print Network (OSTI)

Of the factors governing human-to-human transmission of the highly pathogenic avian-adapted H5N1 virus, the most critical is the acquisition of mutations on the viral hemagglutinin (HA) to quantitatively switch its binding ...

Tharakaraman, Kannan

435

A SCR SWITCHED CAPACITOR VOLTAGE REGULATOR FOR 150 kV NEUTRAL BEAM POWER SUPPLY  

E-Print Network (OSTI)

2 ;;o c: REGULATOR BANK SCR TRIGGER CHASSIS BLOCK DIAGRAMLBL-8156 UC-20 A SCR SWITCHED CAPACITOR VOLTAGE REGULATORwill discharge through the SCR and the diodes. All of the

Milnes, K.A.

2011-01-01T23:59:59.000Z

436

A novel miniaturized passively Q-switched pulse-burst laser for engine ignition  

Science Journals Connector (OSTI)

A novel miniaturized Cr4+:YAG passively Q-switched Nd:YAG pulse-burst laser under 808 nm diode-laser pulse-pumping was demonstrated for the purpose of laser-induced plasma...

Ma, Yufei; Li, Xudong; Yu, Xin; Fan, Rongwei; Yan, Renpeng; Peng, Jiangbo; Xu, Xinrui; Sun, Rui; Chen, Deying

2014-01-01T23:59:59.000Z

437

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

Science Journals Connector (OSTI)

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

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

2010-01-01T23:59:59.000Z

438

Ultrafast all-optical switching with low saturation energy via intersubband transitions in  

E-Print Network (OSTI)

, and H. Ishikawa, "Low-saturation-energy-driven ultrafast all-optical switching operation in (CdS. Cho, "Intersubband absorption at ~ 1.55 m in well- and modulation-doped GaN/AlGaN multiple quantum

Paiella, Roberto

439

Electric transmission based on the switched reluctance motor with independent excitation  

Science Journals Connector (OSTI)

The prospects and experience of using a switched reluctance motor with independent external excitation for a traction electric motor are discussed. The possibility of regulating the excitation allows the motor to...

V. F. Kozachenko; V. N. Ostrirov; M. M. Lashkevich

2014-02-01T23:59:59.000Z

440

Materials and devices for optical switching and modulation of photonic integrated circuits  

E-Print Network (OSTI)

The drive towards photonic integrated circuits (PIC) necessitates the development of new devices and materials capable of achieving miniaturization and integration on a CMOS compatible platform. Optical switching: fast ...

Seneviratne, Dilan Anuradha

2007-01-01T23:59:59.000Z

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


441

Structural Basis of the GreenBlue Color Switching in Proteorhodopsin as Determined by NMR Spectroscopy  

Science Journals Connector (OSTI)

Structural Basis of the GreenBlue Color Switching in Proteorhodopsin as Determined by NMR Spectroscopy ... Consequently, the S0S1 energy gap increases, resulting in the observed blue shift. ...

Jiafei Mao; Nhu-Nguyen Do; Frank Scholz; Lenica Reggie; Michaela Mehler; Andrea Lakatos; Yean-Sin Ong; Sandra J. Ullrich; Lynda J. Brown; Richard C. D. Brown; Johanna Becker-Baldus; Josef Wachtveitl; Clemens Glaubitz

2014-11-21T23:59:59.000Z

442

Tunable Substrate Integrated Waveguide Filters Implemented with PIN Diodes and RF MEMS Switches  

E-Print Network (OSTI)

This thesis presents the first fully tunable substrate integrated waveguide (SIW) filter implemented with PIN diodes and RF MEMS switches. The methodology for tuning SIW filters is explained in detail and is used to create three separate designs...

Armendariz, Marcelino

2012-02-14T23:59:59.000Z

443

On the NP-hardness of checking matrix polytope stability and continuous-time switching stability  

E-Print Network (OSTI)

Motivated by questions in robust control and switched linear dynamical systems, we consider the problem checking whether all convex combinations of k matrices in R[superscript ntimesn] are stable. In particular, we are ...

Gurvits, Leonid

444

An on-line performance optimization of the Switched Reluctance Motor  

E-Print Network (OSTI)

The Switched Reluctance Motor (SRM) has been developed extensively during the past 15 years. Due to the simple motor construction and power converter requirements, SRM drives have been found competitive with traditional AC and DC drives. Optimal...

Tandon, Piyush

2012-06-07T23:59:59.000Z

445

Fuzzy Neural Network Control for Robot Manipulator Directly Driven by Switched Reluctance Motor  

Science Journals Connector (OSTI)

Applications of switched reluctance motor SRM to direct drive robot are increasingly popular because of its valuable advantages. However, the greatest potential defect is its torque ripple owing to the significant nonlinearities. In this paper, a fuzzy ...

Baoming Ge; Anbal T. de Almeida

2011-07-01T23:59:59.000Z

446

Design and testing of a sensorless switched reluctance motor drive with a custom integrated circuit controller  

E-Print Network (OSTI)

presents a breadboard level SRM drive that emirates a custom IC controller implementing closedloop speed control and starting torque.The rotor position sensing information is essential for determining the switching instants to have proper control of speed...

Zhang, Yingxia

2012-06-07T23:59:59.000Z

447

E-Print Network 3.0 - actively q-switched intracavity Sample...  

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

), the laser is passively Q switched for nearly 200 ps before evolving into a self-sustaining mode locking r... -----T-"""""I""j ; 30 *L 5 " 0 Relaxation oscillations Time...

448

Non-homogeneous hidden Markov-switching models for wind time series  

E-Print Network (OSTI)

of wind direction in [27]. However HMMs assume that the successive observations are conditionally conditions at successive time steps for the dataset considered in this work. Markov-Switching Auto

Brest, Université de

449

Thread selection according to predefined power characteristics during context switching on compute nodes  

DOE Patents (OSTI)

Methods, apparatus, and products are disclosed for thread selection during context switching on a plurality of compute nodes that includes: executing, by a compute node, an application using a plurality of threads of execution, including executing one or more of the threads of execution; selecting, by the compute node from a plurality of available threads of execution for the application, a next thread of execution in dependence upon power characteristics for each of the available threads; determining, by the compute node, whether criteria for a thread context switch are satisfied; and performing, by the compute node, the thread context switch if the criteria for a thread context switch are satisfied, including executing the next thread of execution.

None

2013-06-04T23:59:59.000Z

450

Process Switches and Branch Prediction Accuracy David Chen, Bennett Lau, Jeffrey Shafer  

E-Print Network (OSTI)

to "repair" the destructive aliasing in the branch history table after a process switch, both combine in modern deeply pipelined superscalar machines. The penalty of a mispredicted branch can be quite high [6

Rixner, Scott

451

Role of color center induced absorption in all?optical switching  

Science Journals Connector (OSTI)

We show that color center induced absorption can mimic two?photon absorption and may limit all?optical switching even for very short pulses. Two?photon and color center induced absorption are measured in a lead glass fiber.

K. W. DeLong; Victor Mizrahi; G. I. Stegeman; M. A. Saifi; M. J. Andrejco

1990-01-01T23:59:59.000Z

452

Two-photon absorption as a limitation to all-optical switching  

Science Journals Connector (OSTI)

Two-photon absorption can place a fundamental limitation on waveguide all-optical switching devices. We have derived a general criterion to describe this limitation that must be...

Mizrahi, Victor; Saifi, M A; Andrejco, M J; DeLong, K W; Stegeman, G I

1989-01-01T23:59:59.000Z

453

Multiwall carbon nanotube polyvinyl alcohol-based saturable absorber in passively Q-switched fiber laser  

Science Journals Connector (OSTI)

In this work, we demonstrated a compact Q-switched erbium-doped fiber laser capable of generating high-energy pulses using a newly developed multiwall carbon nanotube (CNT) polyvinyl...

Ahmad, H; Ismail, M F; Hassan, S N M; Ahmad, F; Zulkifli, M Z; Harun, S W

2014-01-01T23:59:59.000Z

454

Application and field experience of a digital substation switch  

SciTech Connect

There has been an increase in the use of solid-state, microprocessor-based relays, fault recorders, meters, and programmable controllers; in transmission and distribution substations. These devices can be remotely interrogated or programmed, and can send reports back to a host computer through their RS-232 communications ports. These devices use a wide variety of communications software and protocols. Because these devices can be located in the substation yard, induced surges and voltages can be present on the communication lines. This can impair the ability to communicate over RS-232 lines, and even cause equipment damage. In addition. the distance from the control house to the substation yard can limit the use of standard RS-232 protocol. For greater system economy, several devices must use the same communications channel. This requires a means of reliably connecting several devices to the incoming and outgoing communications circuits. This paper describes a digital substation switch (DSS) that was designed for this application, and its initial installation and field experience at Savannah Electric. The DSS connects various meters, transmission relays, and distribution relays to PCs in remote locations through a voice-grade telephone circuit. In this application, the DSS uses a fiber loop to communicate with the devices in the substation yard.

Spain, R.; Fodero, K.

1994-12-31T23:59:59.000Z

455

A new integrated controller for switched reluctance motor  

SciTech Connect

The interest in switched reluctance motors (SRMs) have increased significantly in recent years, as these motors have found wide applications in industry as a possible alternative to adjustable speed AC and DC drives for many commercial applications. The simple construction and low cost of the SRM have made it an attractive candidate for replacing adjustable speed drives in automobile, aerospace, manufacturing and consumer product. Smooth operation and control of the SRM greatly depend on the external control unit. Instead of using a traditional digital controller with discrete devices, the authors have designed and fabricated a single chip logic controller for controlling torque and speed of an SRM. They have used Programmable Logic Device (PLD) to implement the digital logic coupled with a power controller. They have described the operational logic in the form of a block diagram and from there they have derived the controller logic. Initial testing of the controller for a four-phase SRM drive has been completed. Thorough testing and further research are in progress.

Hossain, A.; Ahmed, A. [Purdue Univ. Calumet, Hammond, IN (United States). Electrical Engineering Technology Dept.

1995-12-31T23:59:59.000Z

456

A rotor position estimator for switched reluctance motors using CMAC  

Science Journals Connector (OSTI)

This paper presents an approach to rotor position estimation in switched reluctance motors (SRMs) by using a cerebellum model articulation controller (CMAC). Previous research has shown that an artificial neural network (ANN) forms an efficient mapping structure through measurement of the flux linkages and currents for the phases. A CMAC is investigated in this paper in order to overcome the high computational power requirement problem that is encountered in a feedforward ANN based rotor position estimator. The CMAC structure does not contain neurons with activation functions, and all mathematical operations are performed without multiplication. These simplicities increase the throughput in real time implementation performed with conventional embedded controllers. However, the distributed memory structure of a CMAC requires more space. The issues involved in designing, training and implementing a CMAC are presented. In order to demonstrate the feasibility of the concept, a 20 kW, 6/4, three phase SRM is studied with training and evaluation data, which are obtained from a simulation program. A CMAC that is based on experimentally measured training and testing data for the same SRM is also used to demonstrate the promise of this approach.

Erkan Mese

2003-01-01T23:59:59.000Z

457

Dynamic behavior analysis of a switched reluctance motor  

Science Journals Connector (OSTI)

Within the home appliances sector the series motor practically shares most applications. However no further progress in cost reduction or control performances is envisaged. But the switched reluctance motor SRM shows fairly good characteristics such as robustness easy assembly and low manufacturing costs. Besides it allows accomplishment of integrated designs with the product and an improvement of efficiency up to 90% when compared to about 45% reached by series motors used for home appliances. However two specific drawbacks of this machine are control complexity and acoustic noise. As a first step with respect to the acoustic noise the target of this work is to develop a theoretical modal model of an SRM of four phases with 24 poles in an external stator and 18 poles rotor placed inside. This requires a theoretical simulation by means of an FEM software and an experimental work in a test bench to analyze the motor structure. The comparison of the results obtained by both methods will validate the theoretical modelanalyzed with the FEM software and introduce structural modifications that can be used to design quiet SRMs from the knowledge of mode shapes and mode frequencies.

2006-01-01T23:59:59.000Z

458

Hybrid plasmonic nanodevices: Switching mechanism for the nonlinear emission  

SciTech Connect

Control of the light emission at the nanoscale is of central interest in nanophotonics due to the many applications in very different fields, ranging from quantum information to biophysics. Resonant excitation of surface plasmon polaritons in metal nanoparticles create nanostructured and enhanced light fields around those structures, which produce their strong interaction in a hybrid nanodevice with other plasmonic or non-plasmonic objects. This interaction may in turn also modulate the far field with important consequences in the applications. We show in this paper that the nonlinear emission from semiconductor quantum dots is strongly affected by the close presence of metal nanoparticles, which are resonantly excited. Using a pulsed laser, optical second harmonic is generated in the quantum dot, and it is highly enhanced when the laser is tuned around the nanoparticle plasmon resonance. Even more interesting is the demonstration of a switching mechanism, controlled by an external continuous-wave field, which can enhance or extinguish the SH signal, even when the pulsed laser is always on. Experimental observations are in excellent agreement with the theoretical calculations, based on the dipole-dipole near-field coupling of the objects forming the hybrid system.

Bragas, Andrea V. [Departamento de Fsica, FCEyN, Universidad de Buenos Aires, IFIBA CONICET, 1428 Buenos Aires (Argentina); Singh, Mahi R. [Department of Physics and Astronomy, Western University, London (Canada)

2014-03-31T23:59:59.000Z

459

Demonstration of the Feasibility of Large Port Count Optical Switching Using a Hybrid MZI SOA Switch Module in a Recirculating Loop  

E-Print Network (OSTI)

B is recorded at a data rate of 10Gb/s. 2014 Optical Society of America OCIS Codes: (130.0250) Optoelectronics, (130.4815) Optical switching devices In recent years, a surge has occurred in the demand for network traffic due to popular internet... . A32, Jul. 2011. [12] R. Stabile, A. Albores-Mejia, and K. A. Williams, Monolithic active-passive 16 16 optoelectronic switch, Opt. Lett. 37, pp. 4666-4668, 2012. [13] V. Aksyuk and S. Arney, 238238 micromechanical optical cross connect...

Cheng, Q.; Wonfor, A.; Wei, J. L.; Penty, R. V.; White, I. H.

2014-09-02T23:59:59.000Z

460

Table A57. Capability to Switch from Coal to Alternative Energy Sources by  

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

7. Capability to Switch from Coal to Alternative Energy Sources by" 7. Capability to Switch from Coal to Alternative Energy Sources by" " Industry Group, Selected Industries, and Selected Characteristics, 1991 " " (Estimates in Thousand Short Tons)" " "," "," ", " "," "," Coal",,," Alternative Types of Energy(b)" " "," ","-","-","-------------","-","-","-","-","-","-","RSE" ,,"Total"," ","Not","Electricity","Natural","Distillate","Residual",,,"Row" ,,"Consumed(c)","Switchable","Switchable","Receipts(d)","Gas","Fuel Oil","Fuel Oil","LPG","Other","Factors"

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


461

Table A58. Capability to Switch from LPG to Alternative Energy Sources by  

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

8. Capability to Switch from LPG to Alternative Energy Sources by" 8. Capability to Switch from LPG to Alternative Energy Sources by" " Industry Group, Selected Industries, and Selected Characteristics, 1991" " (Estimates in Thousand Barrels)" ,," LPG",,," Alternative Types of Energy(b)" ,,"-","-","-------------","-","-","-","-","-","-","-","RSE" ,,"Total"," ","Not","Electricity",,,,,,,"Row" ,,"Consumed(b)","Switchable","Switchable","Receipts(d)","Gas","Fuel Oil","Fuel Oil","Coal","and Breeze","Other(e)","Factors"

462

Characterizing switching problems in low earth orbit satellite constellations with satellite failures  

E-Print Network (OSTI)

CHARACTERIZING SWITCHING PROBLEMS IN LOW EARTH ORBIT SATELLITE CONSTELLATIONS WITH SATELLITE FAILURES A Thesis by BRANDON SCOTT WADSWORTH Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1999 Major Subject: Computer Science CHARACTERIZING SWITCHING PROBLEMS IN LOW EARTH ORBIT SATELLITE CONSTELLATIONS WITH SATELLITE FAILURES A Thesis By BRANDON SCOTT WADSWORTH Submitted to Texas...

Wadsworth, Brandon Scott

2012-06-07T23:59:59.000Z

463

Ultrananocrystalline diamond films with optimized dielectric properties for advanced RF MEMS capacitive switches  

DOE Patents (OSTI)

An efficient deposition process is provided for fabricating reliable RF MEMS capacitive switches with multilayer ultrananocrystalline (UNCD) films for more rapid recovery, charging and discharging that is effective for more than a billion cycles of operation. Significantly, the deposition process is compatible for integration with CMOS electronics and thereby can provide monolithically integrated RF MEMS capacitive switches for use with CMOS electronic devices, such as for insertion into phase array antennas for radars and other RF communication systems.

Sumant, Anirudha V.; Auciello, Orlando H.; Mancini, Derrick C.

2013-01-15T23:59:59.000Z

464

Viscosity Solutions of Systems of PDEs with Interconnected Obstacles and Switching Problem  

SciTech Connect

This paper deals with existence and uniqueness of a solution in viscosity sense, for a system of m variational partial differential inequalities with inter-connected obstacles. A particular case is the Hamilton-Jacobi-Bellmann system of the Markovian stochastic optimal m-states switching problem. The switching cost functions depend on (t,x). The main tool is the notion of systems of reflected backward stochastic differential equations with oblique reflection.

Hamadene, S., E-mail: hamadene@univ-lemans.fr; Morlais, M. A., E-mail: Marie_Amelie.Morlais@univ-lemans.fr [Universite du Maine, LMM (France)

2013-04-15T23:59:59.000Z

465

NPN General Purpose Amplifier This device is designed as a general purpose amplifier and switch.  

E-Print Network (OSTI)

as a general purpose amplifier and switch. The useful dynamic range extends to 100 mA as a switch and to 100-Base Voltage 6.0 V IC Collector Current - Continuous 200 mA TJ, Tstg Operating and Storage Junction Temperature Parameter Test Conditions Min Max Units V(BR)CEO Collector-Emitter Breakdown Voltage IC = 1.0 mA, IB = 0 40

Ravikumar, B.

466

Investigation of inherent radio frequency oscillation and minor switching in amorphous chalcogenide semiconductors  

E-Print Network (OSTI)

INVESTIGATION OF INHERENT RADIO FREQUENCY OSCILLATION AND MINOR SWITCHING IN AMORPHOUS CHALCOGENIDE SEMICONDUCTORS A Thesis by ROBERT WAYNE GILL JR. Submitted to the Graduate College of Texas AAM University in partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1971 Major Subject: Electrical Engineering INVESTIGATION OF INHERENT RADIO FREQUENCY OSCILLATION AND MINOR SWITCHING IN AMORPHOUS CHALCOGENIDE SEMICONDUCTORS A Thesis by ROBERT WAYNE GILL JR...

Gill, Robert Wayne

1971-01-01T23:59:59.000Z

467

Parallel, staged opening switch power conditioning techniques for flux compression generator applications  

SciTech Connect

The Air Force Weapons Laboratory, working jointly with Los Alamos National Laboratory, has conducted a series of experiments directed at exploring composite, or staged, switching techniques for use in opening switches in applications which require the conduction of very high currents (or current densities) with very low losses for relatively long times (several tens of microseconds), and the interruption of these currents in much shorter times (ultimately a few hundred nanoseconds). This paper reports the results of those experiments.

Reinovsky, R.E.; Levi, P.S.; Bueck, J.C.; Goforth, J.H.

1985-01-01T23:59:59.000Z

468

Population dynamical behavior of Lotka-Volterra system under regime switching  

Science Journals Connector (OSTI)

In this paper, we investigate a Lotka-Volterra system under regime switching dx(t)=diag(x"1(t),...,x"n(t))[(b(r(t))+A(r(t))x(t))dt+@s(r(t))dB(t)], where B(t) is a standard Brownian motion. The aim here is to find out what happens under regime switching. ... Keywords: 34F05, 60H10, 92B05, Brownian motion, Generalized It's formula, Markov chain, Stochastic differential equation, Stochastic permanence

Xiaoyue Li; Daqing Jiang; Xuerong Mao

2009-10-01T23:59:59.000Z

469

Table A67. Capability to Switch from Electricity to Alternative Energy Source  

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

7. Capability to Switch from Electricity to Alternative Energy Sources" 7. Capability to Switch from Electricity to Alternative Energy Sources" " by Industry Group, Selected Industries, and Selected Characteristics," " 1994: Part 1" " (Estimates in Million Kilowatthours)" ,,,"Electricity Receipts",,,," Alternative Types of Energy(b)" ,,,,,,,,,,"Coal Coke",,"RSE" "SIC"," ","Total"," ","Not","Natural","Distillate","Residual",,,"and",,"Row" "Code(a)","Industry Group and Industry","Receipts(c)","Switchable","Switchable","Gas","Fuel Oil","Fuel Oil","Coal","LPG","Breeze","Other(d)","Factors"," "

470

Site Characterization Report ORGDP Diffusion Facilities Permanent Shutdown K-700 Power House and K-27 Switch Yard/Switch House  

SciTech Connect

The K-700 Power House area, initially built to supply power to the K-25 gaseous diffusion plant was shutdown and disassembled in the 1960s. This shutdown was initiated by TVA supplying economical power to the diffusion plant complex. As a result of world wide over production of enriched, reactor grade U{sup 235}, the K-27 switch yard and switch house area was placed in standby in 1985. Subsequently, as the future production requirements decreased, the cost of production increased and the separation technologies for other processes improved, the facility was permanently shutdown in December, 1987. This Site Characterization Report is a part of the FY-88 engineering Feasibility Study for placing ORGDP Gaseous Diffusion Process facilities in 'Permanent Shutdown'. It is sponsored by the Department of Energy through Virgil Lowery of Headquarters--Enrichment and through Don Cox of ORO--Enrichment Operations. The primary purpose of these building or site characterization reports is to document, quantify, and map the following potential problems: Asbestos; PCB containing fluids; Oils, coolants, and chemicals; and External contamination. With the documented quantification of the concerns (problems) the Engineering Feasibility Study will then proceed with examining the potential solutions. For this study, permanent shutdown is defined as the securing and/or conditioning of each facility to provide 20 years of safe service with minimal expenditures and, where feasible, also serving DOE's needs for long-term warehousing or other such low-risk use. The K-700 power house series of buildings were either masonry construction or a mix of masonry and wood. The power generating equipment was removed and sold as salvage in the mid 1960s but the buildings and auxiliary equipment were left intact. The nine ancillary buildings in the power house area use early in the Manhattan Project for special research projects, were left intact minus the original special equipment. During the late 1960s and 1970s, some of the abandoned buildings were used for offices, special projects, and storage. Some of the remaining electrical transformers contain PCBs in concentrations less than 500 ppm. Many of the steam and hot water pipes in the buildings are insulated with asbestos insulation, but none of the equipment or buildings have high counts of surface radioactive contamination. The general conditions of the buildings are from fair to poor. Many should be boarded-up to prevent personnel entry and in some cases demolitions would be the safer alternative.

Thomas R.J., Blanchard R.D.

1988-06-13T23:59:59.000Z

471

Resistive switching in doped BiFeO{sub 3} films  

SciTech Connect

Polycrystalline Bi{sub 0.9}Sr{sub 0.1}FeO{sub 3} and Bi{sub 0.9}Ca{sub 0.1}Fe{sub 0.9}Co{sub 0.1}O{sub 3} films (BXFO) were synthesized by sol-gel spin coating method. Local resistive switching behavior was investigated. Bipolar resistive switching characteristics were clearly observed in both two samples. However, for the Bi{sub 0.9}Sr{sub 0.1}FeO{sub 3} film, the switching from the low resistance (LRS) to the high resistance (HRS) occurred at positive bias and the switching from the HRS to the LRS at negative bias. On the contrary, the resistance of Bi{sub 0.9}Ca{sub 0.1}Fe{sub 0.9}Co{sub 0.1}O{sub 3} film was switched from the LRS to the HRS when a negative bias was applied. Possible mechanisms for both resistive switching forms were discussed on the basis of the Schottky-like barrier.

Wu, Lei; Jiang, Changjun, E-mail: jiangchj@lzu.edu.cn; Xue, Desheng [Key Laboratory for Magnetism and Magnetic Materials of MOE, Lanzhou University, Lanzhou 730000 (China)

2014-05-07T23:59:59.000Z

472

E-beam high voltage switching power supply  

DOE Patents (OSTI)

A high power, solid state power supply is described for producing a controllable, constant high voltage output under varying and arcing loads suitable for powering an electron beam gun or other ion source. The present power supply is most useful for outputs in a range of about 100-400 kW or more. The power supply is comprised of a plurality of discrete switching type dc-dc converter modules, each comprising a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, and an output rectifier for producing a dc voltage at the output of each module. The inputs to the converter modules are fed from a common dc rectifier/filter and are linked together in parallel through decoupling networks to suppress high frequency input interactions. The outputs of the converter modules are linked together in series and connected to the input of the transmission line to the load through a decoupling and line matching network. The dc-dc converter modules are phase activated such that for n modules, each module is activated equally 360{degree}/n out of phase with respect to a successive module. The phased activation of the converter modules, combined with the square current waveforms out of the step up transformers, allows the power supply to operate with greatly reduced output capacitance values which minimizes the stored energy available for discharge into an electron beam gun or the like during arcing. The present power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle using simulated voltage feedback signals and voltage feedback loops. Circuitry is also provided for sensing incipient arc currents reflected at the output of the power supply and for simultaneously decoupling the power supply circuitry from the arcing load. 7 figs.

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

1997-03-11T23:59:59.000Z

473

E-beam high voltage switching power supply  

DOE Patents (OSTI)

A high power, solid state power supply is described for producing a controllable, constant high voltage output under varying and arcing loads suitable for powering an electron beam gun or other ion source. The present power supply is most useful for outputs in a range of about 100-400 kW or more. The power supply is comprised of a plurality of discrete switching type dc-dc converter modules, each comprising a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, and an output rectifier for producing a dc voltage at the output of each module. The inputs to the converter modules are fed from a common dc rectifier/filter and are linked together in parallel through decoupling networks to suppress high frequency input interactions. The outputs of the converter modules are linked together in series and connected to the input of the transmission line to the load through a decoupling and line matching network. The dc-dc converter modules are phase activated such that for n modules, each module is activated equally 360.degree./n out of phase with respect to a successive module. The phased activation of the converter modules, combined with the square current waveforms out of the step up transformers, allows the power supply to operate with greatly reduced output capacitance values which minimizes the stored energy available for discharge into an electron beam gun or the like during arcing. The present power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle using simulated voltage feedback signals and voltage feedback loops. Circuitry is also provided for sensing incipient arc currents reflected at the output of the power supply and for simultaneously decoupling the power supply circuitry from the arcing load.

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

1997-01-01T23:59:59.000Z

474

Laser triggering of water switches in terrawatt-class pulse power accelerators.  

SciTech Connect

Focused Beams from high-power lasers have been used to command trigger gas switches in pulse power accelerators for more than two decades. This Laboratory-Directed Research and Development project was aimed at determining whether high power lasers could also command trigger water switches on high-power accelerators. In initial work, we determined that focused light from three harmonics of a small pulsed Nd:YAG laser at 1064 nm, 532 nm, and 355 nm could be used to form breakdown arcs in water, with the lowest breakdown thresholds of 110 J/cm{sup 2} or 14 GW/cm{sup 2} at 532 nm in the green. In laboratory-scale laser triggering experiments with a 170-kV pulse-charged water switch with a 3-mm anode-cathode gap, we demonstrated that {approx}90 mJ of green laser energy could trigger the gap with a 1-{sigma} jitter of less than 2ns, a factor of 10 improvement over the jitter of the switch in its self breaking mode. In the laboratory-scale experiments we developed optical techniques utilizing polarization rotation of a probe laser beam to measure current in switch channels and electric field enhancements near streamer heads. In the final year of the project, we constructed a pulse-power facility to allow us to test laser triggering of water switches from 0.6- MV to 2.0 MV. Triggering experiments on this facility using an axicon lens for focusing the laser and a switch with a 740 kV self-break voltage produced consistent laser triggering with a {+-} 16-ns 1-{sigma} jitter, a significant improvement over the {+-} 24-ns jitter in the self-breaking mode.

Woodworth, Joseph Ray; Johnson, David Lee (Titan Pulse Sciences, San Leandro, CA); Wilkins, Frank (Bechtel Nevada, Las Vegas, NV); Van De Valde, David (EG& G Technical Services, Albuquerque, NM); Sarkisov, Gennady Sergeevich (Ktech Corporation, Albuquerque, NM); Zameroski, Nathan D.; Starbird, Robert L. (Bechtel Nevada, Las Vegas, NV)

2005-12-01T23:59:59.000Z

475

Carbon and energy prices under uncertainty: A theoretical analysis of fuel switching with heterogenous power plants  

Science Journals Connector (OSTI)

Abstract European power producers have a major influence on the EU ETS, given that both their CO2 emissions and their EUA (European Union Allowance) allocations account for more than half of the total volumes of the scheme. Fuel switching is often considered as the main short-term abatement measure under the EU ETS. It consists in substituting combined cycle gas turbines (CCGTs) for hard-coal plants in power generation. Thereby coal plants run for shorter periods, and CO2 emissions are reduced. This paper provides the first theoretical analysis of fuel switching, in a context where power plants involved are not equally efficient. We begin with a preliminary work using illustrative examples and sensitivity analyses, which enables us to observe how differences in the efficiency of power plants impact the cost of fuel switching, and how this is related to the level of switching effort. Based on this, we build a theoretical model taking into account the effect of differences in the efficiency of power plants involved in fuel switching. We also investigate the effect of the timing of fuel switching abatements, within the temporally defined environment of our dynamic model. Results demonstrate that the gas price and uncontrolled CO2 emissions act together on the carbon price. We show that the influence of the gas price on the carbon price depends on the level of uncontrolled CO2 emissions, due to heterogeneity of power plants that are used in the fuel switching process. Furthermore, we show that the time of occurrence of uncontrolled emissions matters so that shocks have a stronger impact when they occur in a period that is closed to the end of the phase.

Vincent Bertrand

2014-01-01T23:59:59.000Z

476

Optical switching and photoluminescence in erbium-implanted vanadium dioxide thin films  

SciTech Connect

Vanadium dioxide (VO{sub 2}) is under intensive consideration for optical switching due to its reversible phase transition, which features a drastic and rapid shift in infrared reflectivity. Classified as an insulatortometal transition, the phase transition in VO{sub 2} can be induced thermally, electrically, and optically. When induced optically, the transition can occur on sub-picosecond time scales. It is interesting to dope VO{sub 2} with erbium ions (Er{sup 3+}) and observe their combined properties. The first excited-state luminescence of Er{sup 3+} lies within the wavelength window of minimal transmission-loss in silicon and has been widely utilized for signal amplification and generation in silicon photonics. The incorporation of Er{sup 3+} into VO{sub 2} could therefore result in a novel photonic material capable of simultaneous optical switching and amplification. In this work, we investigate the optical switching and photoluminescence in Er-implanted VO{sub 2} thin films. Thermally driven optical switching is demonstrated in the Er-implanted VO{sub 2} by infrared reflectometry. Photoluminescence is observed in the thin films annealed at ?800?C or above. In addition, Raman spectroscopy and a statistical analysis of switching hysteresis are carried out to assess the effects of the ion implantation on the VO{sub 2} thin films. We conclude that Er-implanted VO{sub 2} can function as an optical switch and amplifier, but with reduced switching quality compared to pure VO{sub 2}.

Lim, Herianto, E-mail: mail@heriantolim.com; Stavrias, Nikolas; Johnson, Brett C.; McCallum, Jeffrey C. [School of Physics, University of Melbourne, Parkville, Victoria 3010 (Australia); Marvel, Robert E.; Haglund, Richard F. [Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37240 (United States)

2014-03-07T23:59:59.000Z

477

14 ESS (trademark) switch inherent radiation-hardness assessment. Volume 2. Appendices to final report. Final report  

SciTech Connect

The objective of Phase I of the 4 ESS Switch RHA Program document in this report is the preliminary assessment of the Inherent fallout-radiation susceptibility of the 4 ESS Switch. The approach described herein consists of the identification of the active microelectronic piece-parts used in the 4 ESS Switch; characterization of their radiation tolerance, based on available data; preliminary identification of hardness-critical packs; and preliminary analysis of 4 ESS Switch performance during export to ambient (unshielded) fallout radiation, also based on available data.

Not Available

1990-07-01T23:59:59.000Z

478

Characteristics of trap-filled gallium arsenide photoconductive switches used in high gain pulsed power applications  

SciTech Connect

The electrical properties of semi-insulating (SI) Gallium Arsenide (GaAs) have been investigated for some time, particularly for its application as a substrate in microelectronics. Of late this material has found a variety of applications other than as an isolation region between devices, or the substrate of an active device. High resistivity SI GaAs is increasingly being used in charged particle detectors and photoconductive semiconductor switches (PCSS). PCSS made from these materials operating in both the linear and non-linear modes have applications such as firing sets, as drivers for lasers, and in high impedance, low current Q-switches or Pockels cells. In the non-linear mode, it has also been used in a system to generate Ultra-Wideband (UWB) High Power Microwaves (HPM). The choice of GaAs over silicon offers the advantage that its material properties allow for fast, repetitive switching action. Furthermore photoconductive switches have advantages over conventional switches such as improved jitter, better impedance matching, compact size, and in some cases, lower laser energy requirement for switching action. The rise time of the PCSS is an important parameter that affects the maximum energy transferred to the load and it depends, in addition to other parameters, on the bias or the average field across the switch. High field operation has been an important goal in PCSS research. Due to surface flashover or premature material breakdown at higher voltages, most PCSS, especially those used in high power operation, need to operate well below the inherent breakdown voltage of the material. The lifetime or the total number of switching operations before breakdown, is another important switch parameter that needs to be considered for operation at high bias conditions. A lifetime of {approximately} 10{sup 4} shots has been reported for PCSS's used in UWB-HPM generation [5], while it has exceeded 10{sup 8} shots for electro-optic drivers. Much effort is currently being channeled in the study related to improvements of these two parameters high bias operation and lifetime improvement for switches used in pulsed power applications. The contact material and profiles are another important area of study. Although these problems are being pursued through the incorporation of different contact materials and introducing doping near contacts, it is important that the switch properties and the conduction mechanism in these switches be well understood such that the basic nature of the problems can be properly addressed. In this paper the authors report on these two basic issues related to the device operation, i.e., mechanisms for increasing the hold-off characteristics through neutron irradiation, and the analysis of transport processes at varying field conditions in trap dominated SI GaAs in order to identify the breakdown mechanism during device operation. It is expected that this study would result in a better understanding of photoconductive switches, specifically those used in high power operation.

ISLAM,N.E.; SCHAMILOGLU,E.; MAR,ALAN; LOUBRIEL,GUILLERMO M.; ZUTAVERN,FRED J.; JOSHI,R.P.

2000-05-30T23:59:59.000Z

479

New standards for mechanical loading of HV air switches to reduce operating problems  

SciTech Connect

The problems inherent in dealing with mechanical forces upon switch terminals of high voltage air disconnect switches could be reduced substantially if proposed new mechanical loading standards were adopted, says Donald L. Lott of Siemens-Allis' Power Switching division. The result would be longer, more reliable service life. Simply stated, current standards do not take into consideration the bending moment exerted on the switch terminal pad, which can lead to improper alignment, misoperation and high stress on terminal pads. Lott says that mechanical loadings on terminal pads of HV substation air disconnect switches dictate the location of bus or cable support insulators and expansion connectors for rigid bus. While horizontal and vertical (weight of the conductor) forces are usually considered in design criteria, the bending moment caused by rigid bus sag is not taken into consideration when span lengths are long. Yet, he warns, this force often may be the most significant and can influence the location of the bus support insulators. The proposed standards would incorporate the effect of such bending moments.

Not Available

1986-02-01T23:59:59.000Z

480

A comprehensive strategy for transmission switching action in simultaneous clearing of energy and spinning reserve markets  

Science Journals Connector (OSTI)

Abstract There is a great resolution calling for smart grids in recent years. Introduction of new technologies, that make the network flexible and controllable, is a main part of smart grid concept and a key factor to its success. Transmission network as a part of system network has drawn less attention. Transmission switching as a new transmission service can release us from load shedding and remove the constraints violations. Transmission switching can provide economic benefits compared to other control methods such as generation unit rescheduling or load shedding for contingency management. Utilizing a stochastic mix-integer nonlinear programming (SMINLP) model, transmission switching is used during contingencies and steady state to determine optimal required energy and reserve values. Stochastic joint energy and reserve markets with transmission switching considering dynamic constraints has been proposed to minimize the cost of supplying load, security expenses. Considering dynamic constraints in proposed model avoid the occurrence of transient instability when opening the line in transmission switching action. A network reduction method based on modified Jacobean AC NewtonRaphson technique power flow considering switchable line in technique is used for speeding up the calculation, efficiency and simplicity. To investigate the efficiency of the proposed strategy IEEE 14 bus test and IEEE 57 bus test system are studied. According to the obtained results, this strategy decreases energy and reserve marginal prices, as well as security cost.

Rahmat Aazami; Mahmoud Reza Haghifam; Farzad Soltanian; Masoud Moradkhani

2015-01-01T23:59:59.000Z

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


481

A Soft-Switching Inverter for High-Temperature Advanced Hybrid Electric Vehicle Traction Motor Drives  

SciTech Connect

The state-of-the-art hybrid electric vehicles (HEVs) require the inverter cooling system to have a separate loop to avoid power semiconductor junction over temperatures because the engine coolant temperature of 105?C does not allow for much temperature rise in silicon devices. The proposed work is to develop an advanced soft-switching inverter that will eliminate the device switching loss and cut down the power loss so that the inverter can operate at high-temperature conditions while operating at high switching frequencies with small current ripple in low inductance based permanent magnet motors. The proposed tasks also include high-temperature packaging and thermal modeling and simulation to ensure the packaged module can operate at the desired temperature. The developed module will be integrated with the motor and vehicle controller for dynamometer and in-vehicle testing to prove its superiority. This report will describe the detailed technical design of the soft-switching inverters and their test results. The experiments were conducted both in module level for the module conduction and switching characteristics and in inverter level for its efficiency under inductive and dynamometer load conditions. The performance will be compared with the DOE original specification.

None, None

2012-01-31T23:59:59.000Z

482

Salazar, Chu Flip Switch on 65% Energy Savings | Department of Energy  

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

Salazar, Chu Flip Switch on 65% Energy Savings Salazar, Chu Flip Switch on 65% Energy Savings Salazar, Chu Flip Switch on 65% Energy Savings January 30, 2012 - 5:58pm Addthis WASHINGTON, D.C. -Secretary of the Interior Ken Salazar, Secretary of Energy Steven Chu, the National Park Service and the Trust for the National Mall today hosted a lighting ceremony to celebrate the installation of energy-efficient LED lights on the Mall. The LED lights, donated by OSRAM SYLVANIA and installed pro bono by Pepco, the electric utility that serves Washington, D.C., will reduce lighting energy use for the streetlamps by up to 65 percent. "Achieving an economy built on American energy will require an all-of-the-above approach, one that includes safely and responsibly developing our domestic energy resources - and making the most of what we

483

Texas County "Flips The Switch" On New Energy-Efficient Complex |  

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

Texas County "Flips The Switch" On New Energy-Efficient Complex Texas County "Flips The Switch" On New Energy-Efficient Complex Texas County "Flips The Switch" On New Energy-Efficient Complex March 7, 2011 - 5:17pm Addthis Fifth graders from Pharr-San Juan-Alamo Independent School District’s North Alamo Elementary celebrate the opening of the new Precinct 2 Multi-Purpose Facility and Administration Complex in Hidalgo County, TX. The students received tours of the facility and heard presentations from vendors and other green organizations in the Rio Grande Valley on energy efficiency ideas for the home, recycling, energy production and consumption, wind and solar power and groundwater runoff. Fifth graders from Pharr-San Juan-Alamo Independent School District's North Alamo Elementary celebrate the opening of the new Precinct 2

484

NERSC Helps Researchers Discover a Potential On-Off Switch for  

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

Helps Helps Researchers Discover a Potential On-Off Switch for Nanoelectronics NERSC Helps Researchers Discover a Potential On-Off Switch for Nanoelectronics December 22, 2009 Researchers at the Lawrence Berkeley National Laboratory's (Berkeley Lab) Molecular Foundry and Columbia University found that electrical resistance through a molecular junction-a nanometer scale circuit element consisting of a single molecule contacted with gold wires-can be turned on and off by simply pushing and pulling the junction. Experts believe that this newly demonstrated molecular-scale control could be leveraged for future nanoscale electronic devices. The switching phenomenon was initially discovered in experiments conducted by a team of researchers led by Latha Venkataraman of Columbia University.

485

Microsoft Word - CX-Franklin-BadgerCanyonGrandview-RedMtnsDisconnectSwitch_WEB.docx  

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

8, 2012 8, 2012 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Richard Heredia Project Manager - TEP-TPP-1 Proposed Action: Franklin-Badger Canyon and Grandview-Red Mountain switch replacements PP&A Project No.: 2,349 / 2,350 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.3 Routine maintenance Location: Benton County, Washington Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA proposes to replace disconnect switches and related equipment on the Franklin-Badger Canyon No.2 and Grandview-Red Mountain No.1 115- kilovolt transmission lines. The switch stands will be replaced in the same locations as the existing structures, and related load break equipment will be upgraded in-kind to existing. Both

486

Towards Understanding Electronic Switching in Magnets | U.S. DOE Office of  

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

Understanding Electronic Switching in Magnets Understanding Electronic Switching in Magnets Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) News & Resources Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3081 F: (301) 903-6594 E: sc.bes@science.doe.gov More Information » September 2013 Towards Understanding Electronic Switching in Magnets Researchers have invented a new x-ray imaging technique that could reveal key atomic-scale properties in ferroelectric magnetic materials. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Image courtesy of Argonne National Laboratory

487

Efficient Living in a Small House: Could You Make the Switch? | Department  

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

Efficient Living in a Small House: Could You Make the Switch? Efficient Living in a Small House: Could You Make the Switch? Efficient Living in a Small House: Could You Make the Switch? November 10, 2009 - 7:00am Addthis Allison Casey Senior Communicator, NREL From time to time over the last few years, I've come across articles and blogs discussing the "Small House Movement." The movement encourages homeowners to reject the huge homes that dominate many suburban neighborhoods and embrace smaller homes and simpler living. Do a quick Web search on the movement and you'll find many photos and testimonials for these small homes-some smaller than 100 square feet. Many of these homes are fascinating. Not only are the designs innovative, attractive, and comfortable, they are also relatively inexpensive-especially when you consider long-term maintenance costs.

488

Salazar, Chu to Flip Switch on Energy-Efficient LED Lights on National Mall  

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

to Flip Switch on Energy-Efficient LED Lights on to Flip Switch on Energy-Efficient LED Lights on National Mall Salazar, Chu to Flip Switch on Energy-Efficient LED Lights on National Mall January 30, 2012 - 11:02am Addthis WASHINGTON, D.C.-Today, Secretary of the Interior Ken Salazar and Secretary of Energy Steven Chu will participate in a lighting ceremony featuring the newly-installed LED lights on the National Mall. Illuminating the Mall from 3rd to 15th Streets, the LED technology is expected to reduce lighting energy by up to 65 percent and provide a well-lit atmosphere to welcome the National Mall's 25 million annual visitors. "Achieving an economy built on American energy will require an all-of-the-above approach, one that includes safely and responsibly developing our domestic energy resources - and making the most of what we

489

Orbital-resolved spin model for thermal magnetization switching in rare-earth-based ferrimagnets  

Science Journals Connector (OSTI)

The switching of rare-earth-based ferrimagnets triggered by thermal excitation is investigated on the basis of an atomistic spin model beyond the rigid-spin approximation, distinguishing magnetic moments due to electrons in d and f orbitals of the rare earth. It is shown that after excitation of the conduction electrons a transient ferromagneticlike state follows from a dissipationless spin dynamics where energy and angular momentum are distributed between the two sublattices. The final relaxation can then lead to a new state with the magnetization switched with respect to the initial state. The time scale of the switching event is to a large extent determined by the exchange interaction between the two sublattices.

S. Wienholdt; D. Hinzke; K. Carva; P. M. Oppeneer; U. Nowak

2013-07-24T23:59:59.000Z

490

Bimodal switching field distributions in all-perpendicular spin-valve nanopillars  

SciTech Connect

Switching field measurements of the free layer element of 75?nm diameter spin-valve nanopillars reveal a bimodal distribution of switching fields at low temperatures (below 100?K). This result is inconsistent with a model of thermal activation over a single perpendicular anisotropy barrier. The correlation between antiparallel to parallel and parallel to antiparallel switching fields increases to nearly 50% at low temperatures. This reflects random fluctuation of the shift of the free layer hysteresis loop between two different magnitudes, which may originate from changes in the dipole field from the polarizing layer. The magnitude of the loop shift changes by 25% and is correlated to transitions of the spin-valve into an antiparallel configuration.

Gopman, D. B., E-mail: daniel.gopman@physics.nyu.edu; Kent, A. D. [Department of Physics, New York University, New York, New York 10003 (United States); Bedau, D.; Katine, J. A. [HGST San Jose Research Center, San Jose, California 95135 (United States); Mangin, S. [Institut Jean Lamour, UMR CNRS 7198 Universit de Lorraine, Nancy (France); Fullerton, E. E. [CMRR, University of California at San Diego, La Jolla, California 92093 (United States)

2014-05-07T23:59:59.000Z

491

Fuel switching in the electricity sector under the EU ETS: Review and prospective  

SciTech Connect

The European Union has implemented the European Union emission trading scheme (EU ETS) as an instrument to facilitate greenhouse gas (GHG) emission abatement stipulated in the Kyoto protocol. Empirical data show that in the early stages of the EU ETS, the value of a ton of CO{sub 2} has already led to emission abatement through switching from coal to gas in the European electric power sector. In the second part of this paper, an electricity generation simulation model is used to perform simulations on the switching behavior in both the first and the second trading periods of the EU ETS. In 2005, the reduction in GHG emissions in the electric power sector due to EU ETS is estimated close to 88 Mton. For the second trading period, a European Union allowance (EUA) price dependent GHG reduction curve has been determined. The obtained switching potential turns out to be significant, up to 300 Mton/year, at sufficiently high EUA prices.

Delarue, E.; Voorspools, K.; D'haeseleer, W. [Katholieke University of Leuven, Heverlee (Belgium)

2008-06-15T23:59:59.000Z

492

Fundamental New Insight Into Material for Optical-Switching | U.S. DOE  

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

Fundamental New Insight Into Material for Optical-Switching Fundamental New Insight Into Material for Optical-Switching Basic Energy Sciences (BES) BES Home About Research Facilities Science Highlights Benefits of BES Funding Opportunities Basic Energy Sciences Advisory Committee (BESAC) News & Resources Contact Information Basic Energy Sciences U.S. Department of Energy SC-22/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3081 F: (301) 903-6594 E: sc.bes@science.doe.gov More Information » September 2013 Fundamental New Insight Into Material for Optical-Switching A triple point, where three different atomic structures coexist simultaneously, has been uncovered in vanadium dioxide. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Image courtesy of David H Cobden

493

m t L a n n u a L r e s e a r C H r e P O r t 0 0 5 | cartesian Feedback for High-Bandwidth  

E-Print Network (OSTI)

.Onesuchlinearizationtechnique,Cartesianfeedback (CFB), makes use of analog feedback to linearize a nonlinear plant (Figure 1). The commanded baseband inherently restrict the baseband symbol bandwidth. This limitation is juxtaposed with CFB's insensitivity these PA characteristics, CFB is attractive compared to other linearization methods requiring detailed PA

Dawson, Joel

494

How To Order Our easy Build-A Switch concept allows you to mix and match options to create the switch you need. Below is a complete listing of  

E-Print Network (OSTI)

Series 8mm DIP Coded Rotary Switches Features/Benefits · Process sealed ­ withstands soldering Example: Switch Function CD08R 8 position, BCD CD08C 8 position, BCD complement CD10R 10 position, BCD CD10C 10 position, BCD complement CD16R 16 position, Hexadecimal CD16C 16 position, Hexadecimal

Berns, Hans-Gerd

495

New Switches for Utility-Scale Inverters: First In-Class Demonstration of a Completely New Type of SiC Bipolar Switch (15kV-20kV) for Utility-Scale Inverters  

SciTech Connect

Solar ADEPT Project: The SiCLAB is developing a new power switch for utility-scale PV inverters that would improve the performance and significantly reduce the size, weight, and energy loss of PV systems. A power switch controls the electrical energy flowing through an inverter, which takes the electrical current from a PV solar panel and converts it into the type and amount of electricity that is compatible with the electric grid. SiCLAB is using silicon carbide (SiC) semiconductors in its new power switches, which are more efficient than the silicon semiconductors used to conduct electricity in most conventional power switches today. Switches with SiC semiconductors can operate at much higher temperatures, as well as higher voltage and power levels than silicon switches. SiC-based power switches are also smaller than those made with silicon alone, so they result in much smaller and lighter electrical devices. In addition to their use in utility-scale PV inverters, SiCLABs new power switches can also be used in wind turbines, railways, and other smart grid applications.

None

2011-12-31T23:59:59.000Z

496

Implicit two-fluid simulation of electron transport in a plasma erosion opening switch  

SciTech Connect

The two-dimensional implicit code ANTHEM is used to model electron transport in Plasma Opening Switches. We look at low density (approx.4 x 10/sup 12/cm/sup -3/) switches at initial plasma temperatures as low as 5 eV. Two-fluid modeling (ions and electrons with inertia) and implicit determination of the fields is employed to allow time steps well in excess of the inverse plasma period, and cell sizes much larger than a Debye length - with the avoidance of the finite grid anomalous plasma heating characteristic of particle codes. Features indicative of both erosion and E > B plasma drift are manifest in the simulations.

Mason, R.J.; Wallace, J.M.; Lee, K.

1986-01-01T23:59:59.000Z

497

Spatial dynamics of picosecond CO sub 2 laser pulses produced by optical switching in Ge  

SciTech Connect

The design, test and optimization of a picosecond CO{sub 2} pulse-forming system are presented. The system switches a semiconductor's optical characteristics at 10 {mu}m under the control of a synchronized 1.06-{mu}m Nd:YAG picosecond laser pulse. An energy-efficient version of such a system using collimated beams is described. A simple, semi-empirical approach is used to simulate the switching process, specifically including the spatial distributions of the laser energy and phase, which are relevant for experiments in laser-driven electron acceleration. 11 refs., 7 figs.

Pogorelsky, I. (Spectra Technology, Inc., Bellevue, WA (USA) Brookhaven National Lab., Upton, NY (USA)); Fisher, A.S.; Veligdan, J. (Brookhaven National Lab., Upton, NY (USA)); Russell, P. (Princeton Univ., NJ (USA). Dept. of Physics)

1991-01-01T23:59:59.000Z

498

Viscosity solutions of systems of PDEs with interconnected obstacles and Multi modes switching problems  

E-Print Network (OSTI)

This paper deals with existence and uniqueness, in viscosity sense, of a solution for a system of m variational partial differential inequalities with inter-connected obstacles. A particular case of this system is the deterministic version of the Verification Theorem of the Markovian optimal m-states switching problem. The switching cost functions are arbitrary. This problem is connected with the valuation of a power plant in the energy market. The main tool is the notion of systems of reflected BSDEs with oblique reflection.

Hamadne, Said

2011-01-01T23:59:59.000Z

499

Minimum variance hedging with bivariate regime-switching model for WTI crude oil  

Science Journals Connector (OSTI)

This paper proposes a four-regime bivariate Markov regime-switching model to estimate the daily time-varying minimum variance hedge ratios for West Texas Intermediate (WTI) crude oil, and evaluates its in- and out-of-sample hedging performances with two-regime model, CC-GARCH, TVC-GARCH, and OLS models. Empirical results reveal that the four-regime Markov switching model outperforms the other models for both in- and out-of-sample hedging performance. Based on Hansens SPA test (2005), the four-regime model significantly outperforms the other models for only in-sample hedging.

Jui-Cheng Hung; Yi-Hsien Wang; Matthew C. Chang; Kuang-Hsun Shih; Hsiu-Hsueh Kao

2011-01-01T23:59:59.000Z

500

Electrode with transparent series resistance for uniform switching of optical modulation devices  

DOE Patents (OSTI)

Switching uniformity of an optical modulation device for controlling the propagation of electromagnetic radiation is improved by use of an electrode comprising an electrically resistive layer that is transparent to the radiation. The resistive layer is preferably an innerlayer of a wide-bandgap oxide sandwiched between layers of indium tin oxide or another transparent conductor, and may be of uniform thickness, or may be graded so as to provide further improvement in the switching uniformity. The electrode may be used with electrochromic and reversible electrochemical mirror (REM) smart window devices, as well as display devices based on various technologies.

Tench, D. Morgan (Camarillo, CA); Cunningham, Michael A. (Thousand Oaks, CA); Kobrin, Paul H. (Newbury Park, CA)

2008-01-08T23:59:59.000Z