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Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Tailorable optical scattering properties of the V-shaped plasmonic nano-antennas: a computationally efficient and fast analysis  

E-Print Network (OSTI)

We introduce an efficient computational scheme based on Macro Basis Function (MBF) method, to analyze the scattering of a plane wave by the V-shaped plasmonic optical nano-antennas. The polarization currents and the scattered fields for symmetric and anti-symmetric excitations are investigated. We investigate how the resonant frequency of the plasmonic V-shaped nanoantenna is tailored by engineering the geometrical parameters and by changing the polarization state of the incident plane wave. The computational model presented herein is faster by orders of magnitude than commercially available finite methods and is capable to characterize also other nanoantennas comprising of junctions and bends of nanorods.

Rashidi, Arash; Anagnostou, Dimitris E

2015-01-01T23:59:59.000Z

2

When Green Turns to Gold | Photosynthetic Antenna Research Center  

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

When Green Turns to Gold May 6, 2014 When Green Turns to Gold PARC Certificate Graduate Harry Bolson explains the importance of LEED Certification at WUSTL...

3

Plasmonic Quantum Cascade Laser Antenna  

Science Journals Connector (OSTI)

We demonstrate the plasmonic quantum cascade laser antenna, that can confine mid-infrared radiation beyond the diffraction limit, by integrating gold optical antennas on the laser...

Yu, Nanfang; Cubukcu, Ertugrul; Diehl, Laurent; Crozier, Kenneth; Capasso, Federico

4

Gold:  

Science Journals Connector (OSTI)

...include a variety of applications in medicine, engineering, aerospace and catalysis...and the use of nanoparticulate gold in medicine and catalysis is eloquently described...Cobley CM, Xia Y (2009) Gold and nanotechnology. Elements 5: 309-313 Davies G...

Charles R. M. Butt; Robert M. Hough

5

V-shaped resonators for addition of broad-area laser diode arrays  

DOE Patents (OSTI)

A system and method for addition of broad-area semiconductor laser diode arrays are described. The system can include an array of laser diodes, a V-shaped external cavity, and grating systems to provide feedback for phase-locking of the laser diode array. A V-shaped mirror used to couple the laser diode emissions along two optical paths can be a V-shaped prism mirror, a V-shaped stepped mirror or include multiple V-shaped micro-mirrors. The V-shaped external cavity can be a ring cavity. The system can include an external injection laser to further improve coherence and phase-locking.

Liu, Bo; Liu, Yun; Braiman, Yehuda Y.

2012-12-25T23:59:59.000Z

6

Self-propulsion of V-shape micro-robot  

E-Print Network (OSTI)

In this paper we study the self-propulsion of a symmetric V-shape micro-robot (or V-robot) which consists of three spheres connected by two arms with an angle between them; the arms' lengths and the angle are changing periodically. Using an asymptotic procedure containing two-timing method and a distinguished limit, we obtain analytic expressions for the self-propulsion velocity and Lighthill's efficiency. The calculations show that a version of V-robot, aligned perpendicularly to the direction of self-swimming, is both the fastest one and the most efficient one. We have also shown that such $V$-robot is faster and more efficient than a linear three-sphere micro-robot. At the same time the maximal self-propulsion velocity of V-robots is significantly smaller than that of comparable microorganisms.

Vladimir A. Vladimirov

2012-09-13T23:59:59.000Z

7

Effect of Sunlight Polarization on the Absorption Efficiency of V-shaped Organic Solar Cells  

Science Journals Connector (OSTI)

We numerically investigate the effect of sunlight polarization on the absorption efficiency of V-shaped organic solar cells (VOSCs) using the finite element method (FEM). The spectral...

Kang, Kyungnam; Kim, Jungho

2014-01-01T23:59:59.000Z

8

Cooling system for a gas turbine using a cylindrical insert having V-shaped notch weirs  

DOE Patents (OSTI)

An improved cooling system for a gas turbine is disclosed. A plurality of V-shaped notch weirs are utilized to meter a coolant liquid from a pool of coolant into a plurality of platform and airfoil coolant channels formed in the buckets of the turbine. The V-shaped notch weirs are formed in a separately machined cylindrical insert and serve to desensitize the flow of coolant into the individual platform and airfoil coolant channels to design tolerances and non-uniform flow distribution.

Grondahl, Clayton M. (Clifton Park, NY); Germain, Malcolm R. (Ballston Lake, NY)

1981-01-01T23:59:59.000Z

9

Turbulent heat transfer in a trapezoidal channel with transverse and v-shaped ribs on two opposite walls  

E-Print Network (OSTI)

This study investigates the turbulent heat transfer and friction in a trapezoidal channel with opposite walls roughened with transverse and v-shaped ribs. The roughened channel depicts the internal cooling passage of an aerofoil near the trailing...

Subramanian, Karthik

2006-04-12T23:59:59.000Z

10

Controlling spontaneous emission with plasmonic optical patch antennas  

E-Print Network (OSTI)

We experimentally demonstrate the control of the spontaneous emission rate and the radiation pattern of colloidal quantum dots deterministically positioned in a plasmonic patch antenna. The antenna consists of a thin gold microdisk 30 nm above a thick gold layer. The emitters are shown to radiate through the entire patch antenna in a highly directional and vertical radiation pattern. Strong acceleration of spontaneous emission is observed, depending of the antenna size. Considering the double dipole structure of the emitters, this corresponds to a Purcell factor up to 80 for dipoles perpendicular to the disk.

C. Belacel; B. Habert; F. Bigourdan; F. Marquier; J. -P. Hugonin; S. Michaelis de Vasconcellos; X. Lafosse; L. Coolen; C. Schwob; C. Javaux; B. Dubertret; J. -J. Greffet; P. Senellart; A. Maitre

2012-09-28T23:59:59.000Z

11

Influence of Rotor Structure and Number of Phases on Torque and Flux Weakening Characteristics of V-shape Interior PM  

E-Print Network (OSTI)

motor (PM) is one of the most attractive motors applied in compact electric propulsion system, due to its high efficiency, high reliability, and power density. The interior permanent magnet motor (IPM of V-shape Interior PM Electrical Machine Bassel Aslan, Julien Korecki, Thimoté Vigier, Eric Semail

Paris-Sud XI, Université de

12

Gold Nanoparticles  

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

Science Perspective Chemistry World 16 December 2007 Structure of a Coated Gold Nanoparticle summary written by Amber Dance, SLAC Communication Office A team of scientists,...

13

Heat Transfer and Pressure Drop Measurement for Square Channels with V-shape Ribs at High Reynolds Numbers  

E-Print Network (OSTI)

the best thermal performance and e/D=0.18 has the worst thermal performance. The P/e=10 has the best thermal performance and P/e=5 has the worst thermal performance. Re x10 -4 TP 10 20 30 40 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 Figure 10... is better than the angled ribs. In this study, the Reynolds number from 30,000 to 400,000 is studied with V-shaped ribs. The blockage ratio e/D is 0.1, 0.15, and 0.18 and spacing ratio P/e is 5, 7.5, and 10. The results show that the Nusselt number...

Alkhamis, Nawaf Yahya

2010-10-12T23:59:59.000Z

14

Gold Nanoantennas  

SciTech Connect

An array of gold nanoantennas laced into an artificial membrane enhances the fluorescence intensity of three different molecules when they pass through plasmonic hot spots in the array. Watch for the blue, green and red flashes. The photobleaching at the end of each fluorescence event (white flashes) is indicative of single molecule observations.

None

2012-01-01T23:59:59.000Z

15

Other Fresnel Zone Antennas  

Science Journals Connector (OSTI)

In the preceding chapters, theoretical investigations and experiments on a number of Fresnel zone antennas are presented. This chapter is intended to introduce a wider range of Fresnel zone antennas. Section 7...

Y. Jay Guo; Stephen K. Barton

2002-01-01T23:59:59.000Z

16

Wideband active antenna cancellation  

E-Print Network (OSTI)

There exists a simultaneous transmit and receive antenna system where the transmitted signal is creating wideband interference of the receiver. To resolve this interference problem, the isolation between the transmit antenna ...

Adaniya, Hana L

2008-01-01T23:59:59.000Z

17

Magnetism in Nanocrystalline Gold  

Science Journals Connector (OSTI)

Magnetism in Nanocrystalline Gold ... Bridging the current gap in experimental study of magnetism in bare gold nanomaterials, we report here on magnetism in gold nanocrystalline films produced by cluster deposition in the aggregate form that can be considered as a crossover state between a nanocluster and a continuous film. ... gold; nanocrystalline film; magnetism; cluster deposition; SQUID magnetometry ...

Vladimir Tuboltsev; Alexander Savin; Alexandre Pirojenko; Jyrki Risnen

2013-07-07T23:59:59.000Z

18

Recent results for plasma antennas  

SciTech Connect

Plasma antennas are just as effective as metal antennas. They can transmit, receive, and reflect radio waves just as well as metal antennas. In addition, plasma generated noise does not appear to be a problem.

Alexeff, Igor; Anderson, Ted; Farshi, Esmaeil; Karnam, Naresh; Pulasani, Nanditha Reddy [Department of Electrical Engineering, University of Tennessee, Knoxville, Tennessee 37996 (United States)

2008-05-15T23:59:59.000Z

19

Combustion Synthesis Of Ultralow-density Nanoporous Gold Foams  

SciTech Connect

A new synthetic pathway for producing nanoporous gold monoliths through combustion synthesis from Au bistetrazoJeamine complexes has been demonstrated. Applications of interest for Au nanofoams include new substrates for nanoparticle-mediated catalysis, embedded antennas, and spectroscopy. Integrated support-and-catalystin-one nanocomposites prepared through combustion synthesis of mixed AuBTA/metal oxide pellets would also be an interesting technology approach for low-cost in-line catalytic conversion media. Furthermore, we envision preparation of ultrahigh surface area gold electrodes for application in electrochemical devices through this method.

Tappan, Bruce C [Los Alamos National Laboratory; Mueller, Alex H [Los Alamos National Laboratory; Steiner, Stephen A [Los Alamos National Laboratory; Luther, Erik P [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

20

Tunable Nanoscale Plasmon Antenna for Localization and Enhancement of Optical Energy  

E-Print Network (OSTI)

Tunable Nanoscale Plasmon Antenna for Localization and Enhancement of Optical Energy Douglas Howe used. The coupling of optical energy with the surface plasmons that occur on the surface of metals the optical energy that couples with surface plasmons that exist on nanoscale metal structures. Gold

La Rosa, Andres H.

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey D-Array, April 5th 2013 #12;VLA Antenna Pad Transformer Breaker Survey D-Array, April 2013, Bob Broilo 2 Summary: No action needed. Inspected by: Bob2 Visible Light Image Notes: #12;VLA Antenna Pad Transformer Breaker Survey D-Array, April 2013, Bob

Groppi, Christopher

22

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey D-Array, October 2011, Bob Broilo #12;D-Array Antenna Pad Transformer Survey October 2011, Bob Broilo 2 Inspected by: Bob Broilo Inspection Date: 10-hand) feeds DE2. #12;D-Array Antenna Pad Transformer Survey October 2011, Bob Broilo 3 Inspected by: Bob

Groppi, Christopher

23

Quartz antenna with hollow conductor  

DOE Patents (OSTI)

A radio frequency (RF) antenna for plasma ion sources is formed of a hollow metal conductor tube disposed within a glass tube. The hollow metal tubular conductor has an internal flow channel so that there will be no coolant leakage if the outer glass tube of the antenna breaks. A portion of the RF antenna is formed into a coil; the antenna is used for inductively coupling RF power to a plasma in an ion source chamber. The antenna is made by first inserting the metal tube inside the glass tube, and then forming the glass/metal composite tube into the desired coil shape.

Leung, Ka-Ngo (Hercules, CA); Benabou, Elie (Alameda, CA)

2002-01-01T23:59:59.000Z

24

Going green earns Laboratory gold  

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

Going green earns Laboratory gold Going green earns Laboratory gold The Laboratory's newest facility is its first to achieve both the Leadership in Energy and Environmental Design...

25

Wideband dual-linear polarized microstrip patch antenna  

E-Print Network (OSTI)

: the type and thickness of the antenna substrate, the method for feeding the antenna, size of patch antenna, polarization of antenna, the presence of slots in the patch and the use of fractal antennas. II.1 IMPORTANT BROADBAND DESIGN PARAMETERS Antenna... antenna is a fractal patch antenna. Fractal antennas use self similar geometry to focus the current over different regions of the antenna at different resonant frequencies. This leads to fractal antennas acting more as arrays at certain frequencies than...

Smith, Christopher Brian

2009-05-15T23:59:59.000Z

26

Multiple frequency printed slot and dipole antennas  

E-Print Network (OSTI)

combination of integrating solid-state devices on the same substrate as the antenna makes printed circuit antennas highly attractive. An improved less rigorous transmission line model is used to analyze microstrip-fed transverse slot antennas. Adding a...

Kolsrud, Arild

2012-06-07T23:59:59.000Z

27

Integrated Solar Panel Antennas for Cube Satellites.  

E-Print Network (OSTI)

??This thesis work presents an innovative solution for small satellite antennas by integrating slot antennas and solar cells on the same panel to save small (more)

Mahmoud, Mahmoud N.

2010-01-01T23:59:59.000Z

28

It's Elemental - The Element Gold  

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

Platinum Platinum Previous Element (Platinum) The Periodic Table of Elements Next Element (Mercury) Mercury The Element Gold [Click for Isotope Data] 79 Au Gold 196.966569 Atomic Number: 79 Atomic Weight: 196.966569 Melting Point: 1337.33 K (1064.18°C or 1947.52°F) Boiling Point: 3129 K (2856°C or 5173°F) Density: 19.282 grams per cubic centimeter Phase at Room Temperature: Solid Element Classification: Metal Period Number: 6 Group Number: 11 Group Name: none What's in a name? From the Sanskrit word Jval and the Anglo-Saxon word gold. Gold's chemical symbol comes from the the latin word for gold, aurum. Say what? Gold is pronounced as GOLD. History and Uses: An attractive and highly valued metal, gold has been known for at least 5500 years. Gold is sometimes found free in nature but it is usually found

29

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey A-Array, July 2011, Bob Broilo #12;A-Array Antenna Pad Transformer Survey July 2011, Bob Broilo 2 Inspected by: Bob Broilo Inspection Date: 6/16/2011 2 Transformer Survey July 2011, Bob Broilo 3 Inspected by: Bob Broilo Inspection Date: 6/16/2011 1:58:06 PM

Groppi, Christopher

30

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey C-Array, August 20th 2013 #12;VLA Antenna Pad Transformer Breaker Survey C-Array, August 2013, Bob Broilo 2 Summary: Breaker at CE7 needs to be replaced transformer can be shut down with the switch at DE9. Inspected by: Bob Broilo Inspection Date: 8/16/2013 2

Groppi, Christopher

31

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey C-Array, April 2012, Bob Broilo #12;C-Array Antenna Pad Transformer Survey April 2012, Bob Broilo 2 Inspected by: Bob Broilo Inspection Date: 4/4/2012 2 Pad Transformer Survey April 2012, Bob Broilo 3 Inspected by: Bob Broilo Inspection Date: 4/4/2012 2

Groppi, Christopher

32

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey A-Array, May 20, 2014 Summary: The breakers at AN5 Transformer Breaker Survey A-Array, May 2014, Bob Broilo 2 Inspected by: Bob Broilo Inspection Date: 5 Notes: #12;VLA Antenna Pad Transformer Breaker Survey A-Array, May 2014, Bob Broilo 3 Inspected by: Bob

Groppi, Christopher

33

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey B-Array, May 2011, Bob Broilo #12;B-array Antenna Pad Transformer Breaker Survey May 2011, Bob Broilo 2 Inspected by: Bob Broilo Inspection Date: 5 Transformer Breaker Survey May 2011, Bob Broilo 3 Inspected by: Bob Broilo Inspection Date: 5/5/2011 3

Groppi, Christopher

34

Dale Haracre Ceramics In a Patch Antenna  

E-Print Network (OSTI)

Dale Haracre Ceramics In a Patch Antenna #12;Abstract A patch antenna is also known on a flat surface. Ceramic based patched antennas can be used for a wide range of applications.They can:Wi-Fi,WiMAX &Wireless Broadband,WLAN & ISM, and RFID & ISM.The also play a major part in GPS signals. Patch antennas

Mukhopadhyay, Sharmila M.

35

Derivatized gold clusters and antibody-gold cluster conjugates  

DOE Patents (OSTI)

Antibody- or antibody fragment-gold cluster conjugates are shown wherein the conjugate size can be as small as 5.0 nm. Methods and reagents are disclosed in which antibodies, Fab' or F(ab').sub.2 fragments thereof are covalently bound to a stable cluster of gold atoms. The gold clusters may contain 6, 8, 9, 11, 13, 55 or 67 gold atoms in their inner core. The clusters may also contain radioactive gold. The antibody-cluster conjugates are useful in electron microscopy applications as well as in clinical applications that include imaging, diagnosis and therapy.

Hainfeld, James F. (Shoreham, NY); Furuya, Frederic R. (Williston Park, NY)

1994-11-01T23:59:59.000Z

36

Smart antennas based on graphene  

SciTech Connect

We report two configurations of smart graphene antennas, in which either the radiation pattern of the antenna or the backscattering of the periodic metallic arrays is controlled by DC biases that induce metal-insulator reversible transitions of graphene monolayers. Such a transition from a high surface resistance (no bias) to a low surface resistance state (finite bias voltage) causes the radiation pattern of metallic antennas backed with graphene to change dramatically, from omnidirectional to broadside. Moreover, reflectarrays enhance the backscattered field due to the same metal-dielectric transition.

Aldrigo, Martino; Dragoman, Mircea, E-mail: mircea.dragoman@imt.ro [National Institute for Research and Development in Microtechnology (IMT), P.O. Box 38-160, 023573 Bucharest (Romania); Dragoman, Daniela [Physics Faculty, University of Bucharest, P.O. Box MG-11, 077125 Bucharest (Romania)

2014-09-21T23:59:59.000Z

37

Electrically floating, near vertical incidence, skywave antenna  

DOE Patents (OSTI)

An Electrically Floating, Near Vertical Incidence, Skywave (NVIS) Antenna comprising an antenna element, a floating ground element, and a grounding element. At least part of said floating ground element is positioned between said antenna element and said grounding element. The antenna is separated from the floating ground element and the grounding element by one or more electrical insulators. The floating ground element is separated from said antenna and said grounding element by one or more electrical insulators.

Anderson, Allen A.; Kaser, Timothy G.; Tremblay, Paul A.; Mays, Belva L.

2014-07-08T23:59:59.000Z

38

Electrically-driven optical antennas  

E-Print Network (OSTI)

Unlike radiowave antennas, optical nanoantennas so far cannot be fed by electrical generators. Instead, they are driven by light or via optically active materials in their proximity. Here, we demonstrate direct electrical driving of an optical nanoantenna featuring an atomic-scale feed gap. Upon applying a voltage, quantum tunneling of electrons across the feed gap creates broadband quantum shot noise. Its optical frequency components are efficiently converted into photons by the antenna. We demonstrate that the properties of the emitted photons are fully controlled by the antenna architecture, and that the antenna improves the quantum efficiency by up to two orders of magnitude with respect to a non-resonant reference system. Our work represents a new paradigm for interfacing electrons and photons at the nanometer scale, e.g. for on-chip wireless data communication, electrically driven single- and multiphoton sources, as well as for background-free linear and nonlinear spectroscopy and sensing with nanometer...

Kern, Johannes; Prangsma, Jord C; Emmerling, Monika; Kamp, Martin; Hecht, Bert

2015-01-01T23:59:59.000Z

39

Gold Nanoparticles by Alfalfa Plants  

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

Jorge Gardea-Torresdey, University of Texas at El Paso Jorge Gardea-Torresdey, University of Texas at El Paso In the well-known Greek legend the touch of King Midas would convert anything to metallic gold. Recently, a team working at SSRL lead by Professor Jorge Gardea-Torresdey from the University of Texas at El Paso have shown that ordinary alfalfa plants can accumulate very small particles (nanoparticles) of metallic gold (1). The best-known materials that contain nanoparticles of metallic gold are gold colloids. These lack the familiar metallic luster, but show bright colors which range from red, violet or blue, depending upon the size of the nanoparticles (2,3). Colloidal gold has traditionally been used to color materials such as glass (e.g. gold ruby glass and cranberry glass) and enamels (e.g. famille rose enamels) since the 16th century. The earliest report of a colloidal gold preparation may be in the Bible. The book of Exodus reports that Moses destroyed the golden calf in a manner that may have resulted in an aqueous (water-based) gold colloid, which he then forced the Israelites to drink. In modern times gold colloids are imbibed for a variety of ailments (despite little or no evidence of any health-related benefits), but the most important applications may be in the field of nano-technology (see 1, and refs therein).

40

PEOPLE: Gold Medal for Seaborg  

Science Journals Connector (OSTI)

PEOPLE: Gold Medal for Seaborg ... Last week, Dr. Glenn T. Seaborg was tapped for still another honorthis one the Arches of Science Award. ...

1968-09-23T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 1 Gain Enhancement of a Microstrip Patch Antenna  

E-Print Network (OSTI)

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION 1 Gain Enhancement of a Microstrip Patch Antenna, Senior Member, IEEE, Abstract-- In this paper, the performance of a circular mi- crostrip patch antenna is improved using a new cylindrical Electromagnetic Bandgap (EBG) substrate. The microstrip patch antenna

Paris-Sud XI, Université de

42

Antenna beamforming for infrastructureless wireless networks  

E-Print Network (OSTI)

Our work studies the impact of antenna beamforming on the performance of infrastructureless wireless networks. Based on examination of the beampattern for a uniform circular antenna array (UCAA) utilizing beamforming under ...

Godoy, Elizabeth C

2007-01-01T23:59:59.000Z

43

A COGNITIVE COMPENSATION MECHANSIM FOR DEFORMABLE ANTENNAS  

E-Print Network (OSTI)

This thesis presents the design, theory, and measurement of a linearly polarized microstrip patch antenna with a novel substrate-integrated mechanism that can compensate the detuning effects from a physical deformation. Specifically, this antenna...

Long, Stephen A.

2010-07-14T23:59:59.000Z

44

Wireless link design using a patch antenna  

SciTech Connect

A wireless link was designed using a patch antenna. In the process, several different models were tested. Testing proved a patch antenna was a viable solution for building a wireless link within the design specifications. Also, this experimentation provided a basis for future patch antenna design.

Hall, E

2000-08-11T23:59:59.000Z

45

Nested-cone transformer antenna  

DOE Patents (OSTI)

A plurality of conical transmission lines are concentrically nested to form n output antenna for pulsed-power, radio-frequency, and microwave sources. The diverging conical conductors enable a high power input density across a bulk dielectric to be reduced below a breakdown power density at the antenna interface with the transmitting medium. The plurality of cones maintain a spacing between conductors which minimizes the generation of high order modes between the conductors. Further, the power input feeds are isolated at the input while enabling the output electromagnetic waves to add at the transmission interface. Thus, very large power signals from a pulse rf, or microwave source can be radiated.

Ekdahl, Carl A. (Santa Fe, NM)

1991-01-01T23:59:59.000Z

46

Nested-cone transformer antenna  

DOE Patents (OSTI)

A plurality of conical transmission lines are concentrically nested to form an output antenna for pulsed-power, radio-frequency, and microwave sources. The diverging conical conductors enable a high power input density across a bulk dielectric to be reduced below a breakdown power density at the antenna interface with the transmitting medium. The plurality of cones maintain a spacing between conductors which minimizes the generation of high order modes between the conductors. Further, the power input feeds are isolated at the input while enabling the output electromagnetic waves to add at the transmission interface. Thus, very large power signals from a pulse rf, or microwave source can be radiated. 6 figures.

Ekdahl, C.A.

1991-05-28T23:59:59.000Z

47

Antibody-gold cluster conjugates  

DOE Patents (OSTI)

Antibody- or antibody fragment-gold cluster conjugates are shown wherein the conjugate size can be about 5.0 nm. Methods and reagents are disclosed in which antibodies or Fab' fragments thereof are covalently bound to a stable cluster of gold atoms. 2 figs.

Hainfeld, J.F.

1988-06-28T23:59:59.000Z

48

Going green earns Laboratory gold  

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

Going green earns Laboratory gold Going green earns Laboratory gold Going green earns Laboratory gold The Laboratory's newest facility is its first to achieve both the Leadership in Energy and Environmental Design status and Gold certification from the U.S. Green Building Council. June 18, 2012 LANL Green Building Radiological Laboratory Utility Office Building Contact Environmental Communication & Public Involvement P.O. Box 1663 MS M996 Los Alamos, NM 87545 (505) 667-0216 Email "RLUOB's LEED certification demonstrates tremendous leadership in green building...serves as a prime example of just how much we can accomplish." High performance sustainable building attains LEED Gold certification From its robust design to its advanced scientific equipment, the Radiological Laboratory Utility Office Building (RLUOB) is essential to the

49

VLA Antenna Pad Transformer Breaker  

E-Print Network (OSTI)

NRAO VLA Antenna Pad Transformer Breaker Survey B-Array, November 22nd , 2013 Summary: None connections in the cabinet and may be indicating a problem inside the transformer. If the heating on these bushings continues the transformer may need service. NOTE: The low ambient temperature and good conductance

Groppi, Christopher

50

Alluvial Gold Dredging in the Gold Coast Colony  

Science Journals Connector (OSTI)

... which the gold is recovered. The dredges are electrically operated and are supplied from individual substations fed by a 55 kv. overhead transmission line from the power station of Ankobra ...

1940-06-08T23:59:59.000Z

51

CURCUMIN: THE INDIAN SOLID GOLD  

Science Journals Connector (OSTI)

Turmeric, derived from the plant Curcuma longa, is a gold-colored spice commonly used in the Indian subcontinent, not only for health care but also for the preservation of food and as a yellow dye for textiles. C...

Bharat B. Aggarwal; Chitra Sundaram

2007-01-01T23:59:59.000Z

52

Patch antennas with new artificial magnetic layers  

E-Print Network (OSTI)

A new type of high-impedance surfaces (HIS) has been introduced by C.R. Simovski et al. recently. In this paper, we propose to use such layers as artificial magnetic materials in the design of patch antennas. The new HIS is simulated and patch antennas partially filled by these composite layers are measured in order to test how much the antenna dimensions can be reduced. In order to experimentally investigate the frequency behavior of the material, different sizes of the patches are designed and tested with the same material layer. Also the height of the patch is changed in order to find the best possible position for minimizing the antenna size. This composite layer of an artificial magnetic material has made the antenna smaller while keeping the bandwidth characteristics of the antenna about the same. About 40% of size reduction has been achieved.

M. Ermutlu; C. R. Simovski; M. Karkainen; P. Ikonen; A. A. Sochava; S. A. Tretyakov

2005-04-11T23:59:59.000Z

53

Mechanical Measurements of the ALMA Prototype Antennas  

E-Print Network (OSTI)

The specifications of the Atacama Large Millimeter Array (ALMA) have placed stringent requirements on the mechanical performance of its antennas. As part of the evaluation process of the VertexRSI and Alcatel EIE Consortium (AEC) ALMA prototype antennas, measurements of the path length, thermal, and azimuth bearing performance were made under a variety of weather conditions and observing modes. The results of mechanical measurements, reported here, are compared to the antenna specifications.

A. Greve; J. G. Mangum

2007-10-30T23:59:59.000Z

54

RF MEMS reconfigurable triangular patch antenna.  

SciTech Connect

A Ka-band RF MEMS enabled frequency reconfigurable triangular microstrip patch antenna has been designed for monolithic integration with RF MEMS phase shifters to demonstrate a low-cost monolithic passive electronically scanned array (PESA). This paper introduces our first prototype reconfigurable triangular patch antenna currently in fabrication. The aperture coupled patch antenna is fabricated on a dual-layer quartz/alumina substrate using surface micromachining techniques.

Christodoulou, Christos George (The University of New Mexico, Albuquerque, NM); Nordquist, Christopher Daniel; Feldner, Lucas Matthew

2005-07-01T23:59:59.000Z

55

RF MEMS reconfigurable triangular patch antenna.  

SciTech Connect

A Ka-band RF MEMS enabled frequency reconfigurable triangular microstrip patch antenna has been designed for monolithic integration with RF MEMS phase shifters to demonstrate a low-cost monolithic passive electronically scanned array (PESA). This paper introduces our first prototype reconfigurable triangular patch antenna currently in fabrication. The aperture coupled patch antenna is fabricated on a dual-layer quartz/alumina substrate using surface micromachining techniques.

Nordquist, Christopher Daniel; Christodoulou, Christos George (University of New Mexico, Albuquerque, NM); Feldner, Lucas Matthew

2005-01-01T23:59:59.000Z

56

Gold-Coated Nanoparticles For Use In Biotechnology Applications  

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

Gold-Coated Nanoparticles For Use In Biotechnology Applications Gold-Coated Nanoparticles For Use In Biotechnology Applications A process of preparing gold-coated magnetic...

57

Dr. Robert Blankenship | Photosynthetic Antenna Research Center  

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

Robert Blankenship September 10, 2011 Dr. Robert Blankenship "Solar Energy and Photosynthetic Antenna Research" Published: September 10, 2011 Dr. Robert Blankenship, Lucille P....

58

Insect antenna as a smoke detector  

Science Journals Connector (OSTI)

... 100) indicates the electrophysiological response of the antenna to: 1, ?-pinene; 2, carene; 3, 2-methoxy-phenol (guaiacol); 4, 2-methoxy-4-methyl-phenol ( ...

Stefan Schtz; Bernhard Weissbecker; Hans E. Hummel; Karl-Heinz Apel; Helmut Schmitz; Horst Bleckmann

1999-03-25T23:59:59.000Z

59

In The News | Photosynthetic Antenna Research Center  

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

News Dr. Daniel Giammar The Chemistry and Engineering for Producing and Supplying Clean Drinking Water The Photosynthetic Antenna - a moonshot project Dewey Holten has an...

60

Public Outreach & Dissemination | Photosynthetic Antenna Research...  

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

Antenna Research Center. Presentation at the 16th International Congress on Photosynthesis Research. St. Louis, MO. Rachel Ruggirello, David Schuster, Erica Wunderlich...

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Design and performance of a microstrip reflectarray antenna  

E-Print Network (OSTI)

ds and dy. . . . . . Rectangular microstrip patch antenna. Transmission-Line model of microstrip patch antenna. . . . 6a Geometry of microstrip patch radiation. . 6b Radiation patterns of a microstrip patch antenna. 12 Geometry of small...-dipole antenna radiation. 14 8 Observation geometry for two small dipole antennas, . . . . . 15 N-Element linear array. 17 10 Planar array of rectangular microstrip patch antennas. . . . . Typical microstrip transmission line 12 Detailed dimensions of linear...

Javor, Ronald David

2012-06-07T23:59:59.000Z

62

3870 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 53, NO. 12, DECEMBER 2005 Antenna Design for UHF RFID Tags  

E-Print Network (OSTI)

3870 IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 53, NO. 12, DECEMBER 2005 Antenna Design is a big and costly venture, RFID tag antennas are designed for a specific ASIC available in the market

Hochberg, Michael

63

Insulated dipole antennas for heating oil shale  

Science Journals Connector (OSTI)

Insulated dipole antennas in the HF band are potentially useful in heating shale i n s i t u to extract oil. To help evaluate the efficiency of such antennas the spatial distribution of the power absorbed per unit volume in the shale is computed.

John P. Casey; Rajeev Bansal

1987-01-01T23:59:59.000Z

64

Control of blood clotting using gold nanorods  

E-Print Network (OSTI)

We have developed a method to externally control blood clotting using gold nanoparticles. Gold nanorods (NRs) have unique size and shape-dependent optical properties that can be used for externally controlled release of ...

De Puig Guix, Helena

2013-01-01T23:59:59.000Z

65

Mercury and the Gold Country Angler Survey  

E-Print Network (OSTI)

#12;#12;Mercury and the Gold Rush #12;#12;#12;#12;#12;#12;#12;#12;#12;Gold Country Angler Survey A Pilot Study to Assess Mercury Exposure from Sport Fish Consumption in the Sierra Nevada Carrie Monohan, Ph.D. #12;Mercury and the Gold Rush Deer Creek 1908 Greenhorn Creek 2011 Mercury was used during

66

Electronically tunable active antenna using microstrip annular ring  

E-Print Network (OSTI)

&M University Chair oi' Advisory Committee: Dr. Kai Chang The use of the annular ring antenna as an active antenna. element was investi- gated. A circuit model of the antenna derived by considering the annular ring antenna, as s, radial transmission line... antenna. 13 16 10 The annular ring antenna, modeled as radial transmission lines snd load admit tances. 19 11 The complete circuit model of the annular ring antenna. 22 12 Flow chart of the input impedance program. . 13 Input impedance of the TMrz...

Miller, Richard Earl

2012-06-07T23:59:59.000Z

67

E-Print Network 3.0 - antenna engineering handbook Sample Search...  

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

ON ANTENNAS AND PROPAGATION, VOL. 46, NO. 2, FEBRUARY 1998 275 Micromachined Patch Antennas Summary: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 46, NO. 2,...

68

E-Print Network 3.0 - antenna array geometry Sample Search Results  

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

SLOT ANTENNAS Summary: TWO-DIMENSIONAL ARRAY OF RECTANGULAR SLOT ANTENNAS TUNED WITH PATCH STUBS FOR WIDE BANDWIDTH... composed of rectan- gular slot antennas tuned with patch...

69

New developments in the coordination chemistry of Gold(I), Gold(II) and Gold(III) with C-, N- , P-and S-donor ligands.  

E-Print Network (OSTI)

??A comprehensive, comparative structural study of gold(I), gold(II) and gold(III) compounds with the general formula [Aux(C6F5)y(tht)z] (tht = tetrahydrothiophene) was performed. The series of compounds (more)

Coetzee, Jacorien

2007-01-01T23:59:59.000Z

70

Energy-Efficient Antenna Selection and Power Allocation for Large-Scale Multiple Antenna  

E-Print Network (OSTI)

the BS to harvest energy from renewable energy sources such as solar, wind, and so on, can effectivelyEnergy-Efficient Antenna Selection and Power Allocation for Large-Scale Multiple Antenna Systems with Hybrid Energy Supply Zhenyu Zhou1 , Sheng Zhou2 , Jie Gong2 , and Zhisheng Niu2 1 State Key Laboratory

71

Lattice gas model for fragmentation: From Argon on Scandium to Gold on Gold  

E-Print Network (OSTI)

The recent fragmentation data for central collisions of Gold on Gold are even qualitatively different from those for central collisions of Argon on Scandium. The latter can be fitted with a lattice gas model calculation. Effort is made to understand why the model fails for Gold on Gold. The calculation suggests that the large Coulomb interaction which is operative for the larger system is responsible for this discrepancy. This is demonstrated by mapping the lattice gas model to a molecular dynamics calculation for disassembly. This mapping is quite faithful for Argon on Scandium but deviates strongly for Gold on Gold. The molecular dynamics calculation for disassembly reproduces the characteristics of the fragmentation data for both Gold on Gold and Argon on Scandium.

Subal Das Gupta; Jicai Pan

1995-12-20T23:59:59.000Z

72

Relativistic effects in homogeneous gold catalysis  

Science Journals Connector (OSTI)

... Int. Edn 45, 29012904 (2006) Furstner, A. & Hannen, P. Carene terpenoids by gold-catalyzed cycloisomerization reactions. Chem. Commun. 25462547 (2004) Furstner, ...

David J. Gorin; F. Dean Toste

2007-03-22T23:59:59.000Z

73

An overview of global gold market and gold price forecasting Shahriar Shafiee a,n  

E-Print Network (OSTI)

into the relationship between gold price and other key influencing variables, such as oil price and global inflationAn overview of global gold market and gold price forecasting Shahriar Shafiee a,n , Erkan Topal b history: Received 6 February 2009 Received in revised form 20 April 2010 Accepted 17 May 2010 Jel

Boisvert, Jeff

74

Water and Gold: A Promising Mix for Future Batteries  

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

Water and Gold: A Promising Mix for Future Batteries Water and Gold: A Promising Mix for Future Batteries Berkeley Lab Study Reveals Molecular Structure of Water at Gold Electrodes...

75

Antenna model of the Purcell effect  

E-Print Network (OSTI)

The Purcell effect - the modification of the spontaneous emission rate in presence of resonant cavities or other resonant objects - is a fundamental effect of quantum electrodynamics. However, a change of the emission rate caused by environment different from free space has a classical counterpart. Not only quantum emitters, but any small antenna tuned to the resonance is an oscillator with radiative losses, and the influence of the environment on its radiation can be understood and measured in terms of the antenna radiation resistance. We present a general approach which is applicable to measurements of the Purcell factor for radio antennas and to calculations of these factors for quantum emitters. Our methodology is suitable for calculation and measurement of both electric and magnetic Purcell factors, it is versatile and applies to various frequency ranges. The approach is illustrated by a general equivalent scheme and allows the Purcell factor to be expressed through the continious radiation of a small an...

Krasnok, Alexander E; Simovski, Constantin R; Tretyakov, Sergei A; Poddubny, Alexander N; Miroshnichenko, Andrey E; Kivshar, Yuri S; Belov, Pavel A

2015-01-01T23:59:59.000Z

76

A Renewable Electrochemical Magnetic Immunosensor Based on Gold...  

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

Renewable Electrochemical Magnetic Immunosensor Based on Gold Nanoparticle Labels. A Renewable Electrochemical Magnetic Immunosensor Based on Gold Nanoparticle Labels. Abstract: A...

77

Composition-Controlled Synthesis of Bimetallic Gold-Silver Nanoparticl...  

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

Composition-Controlled Synthesis of Bimetallic Gold-Silver Nanoparticles. Composition-Controlled Synthesis of Bimetallic Gold-Silver Nanoparticles. Abstract: This paper reports...

78

Cryogenic CO2 Formation on Oxidized Gold Clusters Synthesized...  

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

Cryogenic CO2 Formation on Oxidized Gold Clusters Synthesized via Reactive Layer Assisted Deposition. Cryogenic CO2 Formation on Oxidized Gold Clusters Synthesized via Reactive...

79

WIDEBAND COPLANAR PATCH-SLOT ANTENNAS FOR RADAR APPLICATIONS  

E-Print Network (OSTI)

WIDEBAND COPLANAR PATCH-SLOT ANTENNAS FOR RADAR APPLICATIONS Atef Z. ElsherhenP, Abdelnasser A of coplanar patch antennas (CPA), designed to operate at a center frequency of.10 GHz with very wideband characteristics. The antenna is based on a rectangular patch surrounded by thin slot. and its performance is tuned

Elsherbeni, Atef Z.

80

Antenna Array Mutual Coupling Effects on Cellular CDMA Communication Systems  

E-Print Network (OSTI)

demands. One such technique is to increase capacity via digital beamforming and base station antenna and/or receiving, some of the energy that is primarily intended for one antenna ends up at the other and mutual impedances of a collection of two­port networks, such as antenna arrays. Using the mutual

Blostein, Steven D.

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Gold catalyst Styrene Benzaldehyde Styrene oxide Acetophenone  

E-Print Network (OSTI)

O O O + + O2 Gold catalyst Styrene Benzaldehyde Styrene oxide Acetophenone studies. However, the study by Turner et al.1 seems to be the first to use Au55 in the synthesis of supported gold catalysts a very narrow and reproducible size distribution for the result- ing particles. Traditional catalyst

Rouyer, Francois

82

Design of the ITER ICRF Antenna  

SciTech Connect

The CYCLE consortium has been designing the ITER ICRF antenna since March 2010, supported by an F4E grant. Following a brief introduction to the consortium, this paper: describes the present status and layout of the design; highlights the key mechanical engineering features; shows the expected impact of cooling and radiation issues on the design and outlines the need for future R and D to support the design process. A key design requirement is the need for the mechanical design and analysis to be consistent with all requirements following from the RF physics and antenna layout optimisation. As such, this paper complements that of Durodie et al.

Hancock, D.; Nightingale, M.; Bamber, R.; Dalton, N.; Lister, J.; Porton, M.; Shannon, M.; Wilson, D.; Wooldridge, E. [EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon, OX14 5ER (United Kingdom); Durodie, F. [ERM/KMS, Association EURATOM-Belgian State, Brussels (Belgium); Firdaouss, M. [CEA, IRFM, F-1308 Saint-Paul-lez Durance (France); Winkler, K. [Max-Planck Institut fur Plasmaphysik, EURATOM-Assoziation, Garching (Germany)

2011-12-23T23:59:59.000Z

83

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

E-Print Network (OSTI)

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

Sheridan, Jennifer

84

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 7, 2008 229 Enhanced Gain Patch Antenna With a Rectangular  

E-Print Network (OSTI)

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 7, 2008 229 Enhanced Gain Patch Antenna method to increase the gain of a conventional microstrip patch antenna is presented. A rectangular loop shaped parasitic radiator placed a specific distance away from the patch surface increases the gain

Cetiner, Bedri A.

85

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 55, NO. 4, APRIL 2007 1193 Frequency Tunable Microstrip Patch Antenna Using RF  

E-Print Network (OSTI)

Microstrip Patch Antenna Using RF MEMS Technology Emre Erdil, Kagan Topalli, Mehmet Unlu, Ozlem Aydin Civi, and Tayfun Akin Abstract--A novel reconfigurable microstrip patch antenna is presented that is monolithically. Reconfigurability of the operating frequency of the microstrip patch antenna is achieved by loading

Akin, Tayfun

86

Glass antenna for RF-ion source operation  

DOE Patents (OSTI)

An antenna comprises a plurality of small diameter conductive wires disposed in a dielectric tube. The number and dimensions of the conductive wires is selected to improve the RF resistance of the antenna while also facilitating a reduction in thermal gradients that may create thermal stresses on the dielectric tube. The antenna may be mounted in a vacuum system using a low-stress antenna assembly that cushions and protects the dielectric tube from shock and mechanical vibration while also permitting convenient electrical and coolant connections to the antenna.

Leung, Ka Ngo (Hercules, CA); Lee, Yung-Hee Yvette (Berkeley, CA); Perkins, Luke T. (Plainsboro, NJ)

2000-01-01T23:59:59.000Z

87

Low cost impulse compatible wideband antenna  

DOE Patents (OSTI)

An antenna apparatus and method for building the antenna is disclosed. Impulse signals travel through a feed point of the antenna with respect to a ground plane. A geometric fin structure is connected to the feed point, and through a termination resistance to the ground plane. A geometric ridge structure connected to the ground is positioned with respect to the fin in order to receive and radiate electromagnetic energy from the impulse signal at a predetermined impedance and over a predetermined set of frequencies. The fin and ridge can be either a wire or a planar surface. The fin and ridge may be disposed within a radiation cavity such as a horn. The radiation cavity is constructed of stamped and etched metal sheets bent and then soldered together. The fin and ridge are also formed from metal sheets or wires. The fin is attached to the feed point and then to the cavity through a termination resistance. The ridge is attached to the cavity and disposed with respect to the fin in order to achieve a particular set of antenna characteristics.

Rosenbury, Erwin T. (Livermore, CA); Burke, Gerald J. (Livermore, CA); Nelson, Scott D. (Tracy, CA); Stever, Robert D. (Lathrop, CA); Governo, George K. (Livermore, CA); Mullenhoff, Donald J. (Livermore, CA)

2002-01-01T23:59:59.000Z

88

Semiconductor Nanowire Optical Antenna Solar Absorbers  

E-Print Network (OSTI)

technology. KEYWORDS Solar cell, semiconductor nanowires, optical antennas, photon management, light trapping a clear, intuitive guidance for the design of efficient NW solar cells. The presented approach to exhibit a strongly angle-dependent optical response and the resulting solar cells require bulky solar

Fan, Shanhui

89

Multiple Antenna Implementation System (MAntIS)  

SciTech Connect

The MAntIS code was developed as an aid to the design of radio frequency (RF) antennas for fusion applications. The code solves for the electromagnetic fields in three dimensions near the antenna structure with a realistic plasma load. Fourier analysis is used in the two dimensions that are tangential to the plasma surface and backwall. The third dimension is handled analytically in a vacuum region with a general impedance match at the plasma-vacuum interface. The impedance tensor is calculated for a slab plasma using the ORION-lD code with all three electric field components included and warm plasma corrections. The code permits the modeling of complicated antenna structures by superposing currents that flow on the surfaces of rectangular parallelepipeds. Specified current elements have feeders that continuously connect the current flowing from the ends of the strap to the feeders. The elements may have an arbitrary orientation with respect to the static magnetic field. Currents are permitted to vary along the length of the current strap and feeders. Parameters that describe this current variation can be adjusted to approximately satisfy boundary conditions on the current elements. The methods used in MAntIS and results for a primary loop antenna design are presented.

Carter, M.D.; Batchelor, D.B.; Jaeger, E.F.

1993-01-01T23:59:59.000Z

90

ANTENNA-COUPLED LIGHT-MATTER INTERACTIONS  

SciTech Connect

This project is focused on antenna-coupled photon emission from single quantum emitters. The properties of optical antennas are tailored to control different photophysical parameters, such as the excited state lifetime, the saturation intensity, and the quantum yield [3]. Using a single molecule coupled to an optical antenna whose position and properties can be controllably adjusted we established a detailed and quantitative understanding of light-matter interactions in nanoscale environments. We have studied various quantum emitters: single molecules [11], quantum dots [7], rareearth ions [2], and NV centers in diamond [19]. We have systematically studied the interaction of these emitters with optical antennas. The overall objective was to establish a high-level of control over the light-matter interaction. In order to eliminate the coupling to the environment, we have taken a step further and explored the possibility of levitating the quantum emitter in high vacuum. What started as a side-project soon became a main activity in our research program and led us to the demonstration of vacuum trapping and cooling of a nanoscale particle [14].

NOVOTNY, LUKAS

2014-01-10T23:59:59.000Z

91

The Greenland Telescope (GLT): Antenna status and future plans  

E-Print Network (OSTI)

The ALMA North America Prototype Antenna was awarded to the Smithsonian Astrophysical Observatory (SAO) in 2011. SAO and the Academia Sinica Institute of Astronomy & Astrophysics (ASIAA), SAO's main partner for this project, are working jointly to relocate the antenna to Greenland to carry out millimeter and submillimeter VLBI observations. This paper presents the work carried out on upgrading the antenna to enable operation in the Arctic climate by the GLT Team to make this challenging project possible, with an emphasis on the unexpected telescope components that had to be either redesigned or changed. Five-years of inactivity, with the antenna laying idle in the desert of New Mexico, coupled with the extreme weather conditions of the selected site in Greenland have it necessary to significantly refurbish the antenna. We found that many components did need to be replaced, such as the antenna support cone, the azimuth bearing, the carbon fiber quadrupod, the hexapod, the HVAC, the tiltmeters, the antenna ...

Raffin, Philippe; Asada, Keichi; Blundell, Raymond; Burgos, Roberto; Chang, Chih-Cheng; Chen, Ming-Tang; Christensen, Robert; Grimes, Paul K; Han, C C; Ho, Paul T P; Huang, Yau-De; Inoue, Makoto; Koch, Patrick M; Kubo, Derek; Leiker, Steve; Liu, Ching-Tang; Martin-Cocher, Pierre; Matsushita, Satoki; Nakamura, Masanori; Nishioka, Hiroaki; Nystrom, George; Paine, Scott N; Patel, Nimesh A; Pradel, Nicolas; Pu, Hung-Yi; Shen, H -Y; Snow, William; Sridharan, T K; Srinivasan, Ranjani; Tong, Edward; Wang, Jackie

2014-01-01T23:59:59.000Z

92

Chiral currents in gold nanotubes  

Science Journals Connector (OSTI)

Results are presented for the electron current in gold chiral nanotubes (AuNTs). Starting from the band structure of (4,3) and (5,3) AuNTs, we find that the magnitude of the chiral currents are greater than those found in carbon nanotubes. We also calculate the associated magnetic flux inside the tubes and find this to be higher than the case of carbon nanotubes. Although (4,3) and (5,3) AuNTs carry transverse momenta of similar magnitudes, the low-bias magnetic flux carried by the former is far greater than that carried by the latter. This arises because the low-bias longitudinal current carried by a (4,3) AuNT is significantly smaller than that of a (5,3) AuNT.

D. Zs. Manrique; J. Cserti; C. J. Lambert

2010-02-04T23:59:59.000Z

93

(Data in metric tons1 of gold content, unless noted)  

E-Print Network (OSTI)

combined production accounted for nearly 80% of the U.S. total. The trend for recent U.S. gold exploration68 GOLD (Data in metric tons1 of gold content, unless noted) Domestic Production and Use: Gold was recovered as a byproduct of processing base metals, chiefly copper. Twenty-five lode mines yielded

94

CHEMICAL SPECIATION OF GOLD IN ARSENOPYRITE  

Science Journals Connector (OSTI)

...ores. Hyperfine Interact. 70 , 945-948. ---, --- Wang, N. (1995): On the chemical state of combined gold in...X-ray synchrotron microprobe techniques and applications. In Synchroton Methods in Clay Science (D.G. Schulze, J.W. Stucki...

Louis J. Cabri; Matthew Newville; Robert A. Gordon; E. Daryl Crozier; Stephen R. Sutton; Greg McMahon; De-Tong Jiang

95

Striking Nano Gold | Advanced Photon Source  

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

2003 | 2002 2001 | 2000 | 1998 | Subscribe to APS Science Highlights rss feed Striking Nano Gold FEBRUARY 6, 2008 Bookmark and Share X-ray crystal structure of the Au102(p-MBA)44...

96

EEL 4461 Antenna Systems 1. Catalog Description (3 credits) Electromagnetic field theory and its application to  

E-Print Network (OSTI)

-field radiation RF propagation, ground effect, weather effect, RF safety Dipole antennas Loop antennas Microstrip minutes each 10. Meeting Location ­ 202 NEB 11. Material and Supply Fees - None 12. Textbooks and Software of antenna Introduction of different types of antennas and their applications Antenna radiation pattern

Fang, Yuguang "Michael"

97

New Concepts For High Power ICRF Antennas  

SciTech Connect

This paper presents new concepts for Ion Cyclotron Heating antennas based on cascaded sequences of tuned radiating structures. It is shown that, in large arrays, such as the ones proposed for fusion reactors applications, these schemes offer, in principle, a number of desirable features, such as operation at power density significantly higher than currently adopted systems, at equal maximum voltage and array geometry, simple mechanical layout, suitable for water cooling, a compact impedance tuning system, passive decoupling of the array elements, single ended or balanced feed from two power sources. The antenna layout also allows the remote, real time measurement of the complex impedance of the radiating elements and the detection, location, and measurement of the complex admittance of arcs occurring anywhere in the structure, as discussed in [1].

Bosia, G. [Department of Physics University of Turin (Italy)

2011-12-23T23:59:59.000Z

98

Meandered-line antenna with integrated high-impedance surface.  

SciTech Connect

A reduced-volume antenna composed of a meandered-line dipole antenna over a finite-width, high-impedance surface is presented. The structure is novel in that the high-impedance surface is implemented with four Sievenpiper via-mushroom unit cells, whose area is optimized to match the meandered-line dipole antenna. The result is an antenna similar in performance to patch antenna but one fourth the area that can be deployed directly on the surface of a conductor. Simulations demonstrate a 3.5 cm ({lambda}/4) square antenna with a bandwidth of 4% and a gain of 4.8 dBi at 2.5 GHz.

Forman, Michael A.

2010-09-01T23:59:59.000Z

99

Combined ICR heating antenna for ion separation systems  

SciTech Connect

A combination of one- and two-wave antennas (one and two turns of conductors around a plasma cylinder, respectively) is proposed. This combined antenna localizes an RF field within itself. It is shown that spent nuclear fuel processing systems based on ICR heating of nuclear ash by such a combined antenna have high productivity. A theory of the RF field excitation in ICR ion separation systems is presented in a simple and compact form.

Timofeev, A. V. [Russian Research Centre Kurchatov Institute (Russian Federation)

2011-01-15T23:59:59.000Z

100

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

E-Print Network (OSTI)

G. Gentili, Dual frequency patch antennas, IEEE An- tennasF. Yang and Y. Rahmat-Samii, Patch antennas with switchable47, no. 2, pp. 1329, Apr. , Patch antenna with swichable

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

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

E-Print Network 3.0 - antenna pifa utilizing Sample Search Results  

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

PROPAGATION LETTERS, VOL. 4, 2005 429 A Dual-Band Internal Antenna With a Parasitic Patch Summary: antenna of the modified planar inverted F antenna (PIFA) type with a par-...

102

Active Integrated Metamaterial-based Antennas and Microwave Components  

E-Print Network (OSTI)

Amplifier-Based CRLH-Transmission Line Leaky Wavevi CRLH-Transmission Line Leaky Wave Antennas IntegratedPurely right-handed transmission line: a) Circuit model for

Wu, Chung-Tse

2014-01-01T23:59:59.000Z

103

FET active notch antennas for quasi-optical power combining  

E-Print Network (OSTI)

different solid-state circuit structures can be used to create the active antenna elements used in quasi-optical power combining arrays A new type of active antenna which combines an FET oscillator with a notch antenna has been designed and tested... Oscillators C. Design and Performance of the FET Active Notch Antenna . . . . . D Injection Locking. . . Page ul tv jx 10 10 14 20 20 20 23 30 CHAPTER 1, Injection Locking to an External Power Source . . . . 2. Injection Locking the FET Active...

Leverich, William Kent

1993-01-01T23:59:59.000Z

104

A new radiation stripline ICRF antenna design for EAST Tokamak  

SciTech Connect

A new type of toroidal long Radiation Stripline Antenna (RSA) is presented, which can effectively improve antenna radiation, leading in reduction of max voltage on transmission line and decrease of the sensitivity to ELM's of the ICRF system at some frequencies. Based on the new concept, a 4-straps RSA is proposed for EAST device. Using 3-D computing simulator code (HFSS), RF current distribution, S-parameters and electromagnetic field distribution on and near the RSA ICRF antenna are analyzed and compared with present ICRF antenna on EAST.

Qin, C. M.; Zhao, Y. P.; Wan, B. N.; Li, J.; Zhang, X. J.; Yang, Q. X.; Yuan, S. [Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031 (China); Braun, F. [Max-Planck Institute for Plasma Physics, D-85748, Garching (Germany); Notedame, J.-M. [Max-Planck Institute for Plasma Physics, D-85748, Garching, Germany and University of Gent (Belgium); Kasahara, H. [National Institute for Fusion Science, Toki (Japan); Collaboration: ICRF Team on EAST

2014-02-12T23:59:59.000Z

105

Optical Patch Antennas - Analysis and Design inspired by Radio Frequency  

Science Journals Connector (OSTI)

Optical antennas have been quite instrumental in manipulating light in subwavelength scales. Considering their significant resemblance to RF counterparts, computational tools of patch...

Unal, Gul Seda; Aksun, M Irsadi

106

E-Print Network 3.0 - antenna development project Sample Search...  

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

cabinets and antennas, will be located... Medical Center Way. 2. Why does UCSF need the cell phone antenna equipment installed? Cellular ... Source: Derisi, Joseph - Department...

107

E-Print Network 3.0 - antenna straps design Sample Search Results  

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

part of the plasma heating system mix to reach the Summary: ITER ion cyclotron heating systems design Section view through antenna module Thermal model of antenna......

108

Wideband Reflectarray Using Compact Coupled Element and Rectifying Antenna Combined with Reflectarray  

E-Print Network (OSTI)

the Archimedean spiral antenna over the bandwidth. The research presented in this dissertation suggests useful techniques for wideband reflectarrays, wireless power transmission, and wideband antenna designs....

Oh, Seong Won

2012-10-19T23:59:59.000Z

109

E-Print Network 3.0 - adaptive antenna array Sample Search Results  

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

Wireless@Virginia Tech Antennas and Propagation Summary: on site. This includes simple patch antennas and complex wideband elements and arrays. Other types... adaptive...

110

E-Print Network 3.0 - antenna complexes protect Sample Search...  

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

Wireless@Virginia Tech Antennas and Propagation Summary: on site. This includes simple patch antennas and complex wideband elements and arrays. Other types... Wireless@Virginia...

111

E-Print Network 3.0 - antenna array printed Sample Search Results  

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

Fabrication Printed antennas are fabricated and tested... on site. This includes simple patch antennas and complex wideband elements and arrays. Other types... A number of printed...

112

E-Print Network 3.0 - antenna-coupled transition edge Sample...  

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

through antenna coupling... or quasi-particles trapping. Antenna coupling can ... Source: Roma "La Sapienza", Universit di - Dipartimento di Fisica, Quantum Optics Group...

113

Gold Country Energy | Open Energy Information  

Open Energy Info (EERE)

Gold Country Energy Gold Country Energy Place Alaska Utility Id 56739 Utility Location Yes Ownership I NERC WECC Yes Operates Generating Plant Yes Activity Generation Yes Activity Transmission Yes References EIA Form EIA-861 Final Data File for 2010 - File2_2010[1] EIA Form EIA-861 Final Data File for 2010 - File1_a[2] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates Residential: $0.6670/kWh Commercial: $0.6430/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File2_2010" ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=Gold_Country_Energy&oldid=412919"

114

Gold Standard Program Model | Open Energy Information  

Open Energy Info (EERE)

Gold Standard Program Model Gold Standard Program Model Jump to: navigation, search Tool Summary Name: Gold Standard Program Model Agency/Company /Organization: World Wildlife Fund Sector: Climate, Energy User Interface: Other Complexity/Ease of Use: Moderate Website: www.cdmgoldstandard.org/project-certification/rules-and-toolkit Cost: Paid Related Tools Environmental Benefits Mapping and Analysis Program (BenMAP) MIT Emissions Prediction and Policy Analysis (EPPA) Model ProForm ... further results Find Another Tool FIND DEVELOPMENT IMPACTS ASSESSMENT TOOLS A bottom-up method of certifying Kyoto Protocol Clean Development Mechanism projects and voluntary programs that result in verifiable co-benefits. Approach It is a bottom up method of certifying Kyoto Protocol Clean Development Mechanism projects as well as voluntary programs that result in verifiable

115

Gold SolarWind GmbH | Open Energy Information  

Open Energy Info (EERE)

Gold SolarWind GmbH Place: Aiterhofen, Germany Zip: 94330 Sector: Wind energy Product: German project developer of PV and wind plants. References: Gold SolarWind GmbH1 This...

116

A Heart of Gold? Try Platinum | Department of Energy  

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

A Heart of Gold? Try Platinum A Heart of Gold? Try Platinum December 1, 2014 - 3:21pm Addthis This coronary stent is made with a lab-developed, award-winning platinum-chromium...

117

Gold nanoparticle assemblies: Interplay between thermal effects and optical response  

E-Print Network (OSTI)

1 Gold nanoparticle assemblies: Interplay between thermal effects and optical response Bruno nanoparticle assemblies depends on many parameters regarding both material morphology and light excitation-embedded gold nanoparticles can result in the generation of thermal excitations through different energy

Boyer, Edmond

118

BioGold Fuels Corporation | Open Energy Information  

Open Energy Info (EERE)

BioGold Fuels Corporation BioGold Fuels Corporation Jump to: navigation, search Name BioGold Fuels Corporation Place Los Angeles, California Zip CA 90067 Product BioGold Fuels Corporation has licensed and/or developed through joint ventures a lower-cost, higher-output system for the production of diesel fuel derived from Municipal Solid Waste ("MSW"). References BioGold Fuels Corporation[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. BioGold Fuels Corporation is a company located in Los Angeles, California . References ↑ "BioGold Fuels Corporation" Retrieved from "http://en.openei.org/w/index.php?title=BioGold_Fuels_Corporation&oldid=342834" Categories:

119

AIPS Memo 93 Position Angle of the VSOP Antenna Feed.  

E-Print Network (OSTI)

satellite construction, including antenna and solar panels, is shown in Fig. 1. We define a right hand observed and Y 1 is the axis about which the solar panels can be rotated. The solar panels are pointed a = ~s \\Gamma ~e (~e \\Delta ~s) (2) 1 Information about the VSOP antenna and solar panels was provided

Groppi, Christopher

120

Analysis and Design of a Multifunctional Spiral Antenna  

E-Print Network (OSTI)

not impart any physical insight into the effect each design parameter has on the overall operation of the spiral antenna. This work examines the operation of spiral antennas and obtains a closed-form analytical solution by conformal mapping and transmission...

Chen, Teng-Kai

2012-10-19T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Impact of optical antennas on active optoelectronic devices  

E-Print Network (OSTI)

Impact of optical antennas on active optoelectronic devices Alireza Bonakdar and Hooman Mohseni that are integrated with optoelectronic devices. Herein, we describe the fundamental reasons for and experimental antennas with optoelectronic devices can lead to the realization of highly compact multifunctional

Mohseni, Hooman

122

Compact Printed Quadrifilar Helix Antennas for Stratospheric Balloons Telemetry  

E-Print Network (OSTI)

Compact Printed Quadrifilar Helix Antennas for Stratospheric Balloons Telemetry L. Hanane* (1, 2 for meteorological stratospheric balloons. The PQH antenna, patented by the CNES [1], is relatively simple over a wide range of elevation angle. However the reduction in size of modern stratospheric balloon

Boyer, Edmond

123

Compact Wideband Dual-Polarized Microstrip Patch Antenna  

E-Print Network (OSTI)

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

Bornemann, Jens

124

Triangular Lattices for Mutual Coupling Reduction in Patch Antenna Arrays  

E-Print Network (OSTI)

Triangular Lattices for Mutual Coupling Reduction in Patch Antenna Arrays Nurul H. Noordin, Ahmed O a triangular lattice configuration as a technique to reduce the mutual coupling in patch antenna arrays. A 4-element circular patch array with a triangular lattice is simulated and compared against a 4-element

Arslan, Tughrul

125

Scaling of the conductance in gold nanotubes  

Science Journals Connector (OSTI)

A new form of gold nanobridges has been recently observed in ultrahigh-vacuum experiments, where gold atoms rearrange to build helical nanotubes, akin in some respects to carbon nanotubes. The good reproducibility of these wires and their unexpected stability allow for conductance measurements and make them promising candidates for future applications. We present here a study of the transport properties of these nanotubes in order to understand the role of chirality and of the different orbitals in quantum transport observables. The conductance per atomic row shows a light decreasing trend as the diameter grows, which is also shown through an analytical formula based on a one-orbital model.

Miriam del Valle; Carlos Tejedor; Gianaurelio Cuniberti

2006-07-10T23:59:59.000Z

126

1 | P a g e Boiler Gold Rush  

E-Print Network (OSTI)

1 | P a g e Boiler Gold Rush VISION STATEMENT The vision of BGR is twofold: first, help all new by participating in the premiere orientation program in the nation, Boiler Gold Rush. Second, enhance upper leaders for the betterment of the university. PROGRAM GOALS Boiler Gold Rush will provide the following

Ginzel, Matthew

127

Gold-coated nanoparticles for use in biotechnology applications  

DOE Patents (OSTI)

A process of preparing gold-coated magnetic nanoparticles is disclosed and includes forming a suspension of magnetic nanoparticles within a suitable liquid, adding an amount of a reducible gold compound and a reducing agent to the suspension, and, maintaining the suspension for time sufficient to form gold-coated magnetic nanoparticles.

Berning, Douglas E. (Los Alamos, NM); Kraus, Jr., Robert H. (Los Alamos, NM); Atcher, Robert W. (Los Alamos, NM); Schmidt, Jurgen G. (Los Alamos, NM)

2009-07-07T23:59:59.000Z

128

Gold-coated nanoparticles for use in biotechnology applications  

DOE Patents (OSTI)

A process of preparing gold-coated magnetic nanoparticles is disclosed and includes forming a suspension of magnetic nanoparticles within a suitable liquid, adding an amount of a reducible gold compound and a reducing agent to the suspension, and, maintaining the suspension for time sufficient to form gold-coated magnetic nanoparticles.

Berning, Douglas E. (Los Alamos, NM); Kraus, Jr., Robert H. (Los Alamos, NM); Atcher, Robert W. (Los Alamos, NM); Schmidt, Jurgen G. (Los Alamos, NM)

2007-06-05T23:59:59.000Z

129

"Green Gold" pasture ecosystem management programme 16 .06.2008  

E-Print Network (OSTI)

1 "Green Gold" pasture ecosystem management programme 1 16 .06.2008 Pastoral system and herders communities Professor D.Dorligsuren Programme Coordinator "Green Gold" Pasture Ecosystem Management Programme Swiss Agency for Cooperation and Development, Mongolia "Green Gold" pasture ecosystem management

130

510 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 10, 2011 A Scalable Solar Antenna for Autonomous Integrated  

E-Print Network (OSTI)

that can be integrated underneath a solar panel is presented. The topology alleviates the effect of solar--3-D RF modules, autonomous modules, omni- directional antenna, solar antenna, solar panel, wireless consumption of every individual node [11]. Currently, solar panels harvest the largest reported amount

Tentzeris, Manos

131

Layer-by-layer assembly of graphene and gold nanoparticles by vacuum filtration and spontaneous reduction of gold ionsw  

E-Print Network (OSTI)

Layer-by-layer assembly of graphene and gold nanoparticles by vacuum filtration and spontaneous 2009 DOI: 10.1039/b821920f Layer-by-layer films comprised of alternating graphene and gold nanoparticle graphene oxide solution to fabricate the graphene thin film on the quartz substrate, followed by gold

Kim, Yong Jung

132

Gold in Egypt: Does the future get worse or better?  

Science Journals Connector (OSTI)

Abstract Within the Eastern Desert of Egypt, there are more than hundred vein-type gold deposits and occurrences. Gold was mined in the Dynastic and Roman periods of the Egyptian history and most of the attention was focused entirely on the near-surface high grade parts of these veins. Currently, beside the more problematic sulphide-rich quartz veins, which generally occur in the lower levels of the worked out auriferous quartz veins, some targets including wall-rock alteration, listwaenite, dumps and tailings of ancient mines, by-product gold hosted in volcanogenic massive sulphide deposits and gold-bearing Algoma-type BIF, as well as alluvial gold constitute the new targets for gold in the Eastern Desert of Egypt. In most of these targets, gold displays a bimodal distribution; occurring both as free-milling gold and in the form of sub-microscopic or ''invisible'' gold in refractory sulphides and sulfoarsenides such as pyrite, chalcopyrite, arsenopyrite, gersdorffite and pentlandite minerals. Characterizing gold in an ore is important in extraction metallurgy. Free-milling gold can be efficiently recovered by crushing, grinding and cyanidation without additional processing. In refractory ores, on the other hand, conventional milling can liberate the sulphides from the gangue allowing a low content of concentrate to be produced by a process such as flotation. However, direct leaching of the concentrate results in poor gold extractions as the cyanide lixiviant is unable to contact the gold locked within the refractory host. Oxidative pretreatment is required for such ores and the methods available for oxidation are roasting (calcination), pressure oxidation, and bacterial oxidation; all oxidize the refractory minerals in the ore to render the gold amenable to cyanidation. Whilst such oxidative methods are capable of achieving reasonable recoveries, yet it increases the capital and operation costs. An alternative, applicable to the liberation of gold from the refractory host, is to continue the grinding process to reduce the particle size of the host mineral thereby exposing a part of the gold surface for contact with the cyanide solution. A benefit of this technique is that the environmental aspects of the oxidation reaction products are avoided, however the ultra fine grinding also add more operation costs. Metallurgical studies carried out on some gold deposits, dumps and tailings of the ancient gold mines in Egypt, proved that these ores are amenable to percolation leaching (concentration of KCN is varying between 0.5 and 1 gm/L) for the (-10 mm) grain size, and consequently heap leaching is a successful technique as the results of these laboratory scale column tests show. In most of these studies, a marked improvement in the percent of gold recovery was gained when the crushed ore is agglomerated by the addition of water, lime and/or cement particularly in ores containing significant quantities of clay minerals and clay-forming minerals (e.g. sericite and muscovite), and by addition of kerosene which passivates the adsorption surfaces on the graphite. Placer gold is recovered by gravity methods utilizing the large difference in specific gravity between gold and commonly associated minerals such as quartz and feldspar. The equipments range from a simple pan to more complex devices used in gold recovery plants and dredges. Modern studies in Egypt point to the presence of different targets of gold; diverse in their gold content, mode of occurrence of gold and the metallurgical treatments required for extracting gold. With the advance of the modern techniques such as Electron Microprobe Analyses (EMPA), laser Ablation Microprobe Inductively Coupled Plasma Mass Spectroscopy (LAM-ICP-MS), gold ores in Egypt should be re-characterized precisely to know the specifications of these ores and consequently predict their metallurgical regime required, and with the high world gold price, it has become necessary to take in consideration the presence of refractory gold ores as one of these targets in Egypt. Generally speaking, labora

N.S. Botros

2014-01-01T23:59:59.000Z

133

Design of Compact Stacked-Patch Antennas on LTCC Technology for Wireless Communication Applications  

E-Print Network (OSTI)

Design of Compact Stacked-Patch Antennas on LTCC Technology for Wireless Communication Applications, but on the other hand also reduces the bandwidth of planar patch antennas, thus making the design for practical for improving the bandwidth performance of a patch antenna is to add parasitic elements to the antenna structure

Tentzeris, Manos

134

Reproducible, high performance patch antenna array apparatus and method of fabrication  

SciTech Connect

A reproducible, high-performance patch antenna array apparatus includes a patch antenna array provided on a unitary dielectric substrate, and a feed network provided on the same unitary substrate and proximity coupled to the patch antenna array. The reproducibility is enhanced by using photolithographic patterning and etching to produce both the patch antenna array and the feed network.

Strassner, II, Bernd H. (Albuquerque, NM)

2007-01-23T23:59:59.000Z

135

Method of making radio frequency ion source antenna and such antenna  

DOE Patents (OSTI)

In the method, the radio frequency (rf) antenna is made by providing a clean coil made of copper tubing or other metal conductor, which is coated with a tacky organic binder, and then with a powdered glass frit, as by sprinkling the frit uniformly over the binder. The coil is then heated internally in an inert gas atmosphere, preferably by passing an electrical heating current along the coil. Initially, the coil is internally heated to about 200/sup 0/C to boil off the water from the binder, and then to about 750 to 850/sup 0/C to melt the glass frit, while also burning off the organic binder. The melted frit forms a molten glass coating on the metal coil, which is then cooled to solidify the glass, so that the metal coil is covered with a thin continuous homogeneous impervious glass coating of substantially uniform thickness. The glass coating affords complete electrical insulation and complete dielectric protection for the metal coil of the rf antenna, to withstand voltage breakdown and to prevent sputtering, while also doubling the plasma generating efficiency of the rf antenna, when energized with RF power in the vacuum chamber of an ion source for a particle accelerator or the like. The glass frit preferably contains approximately 45% lead oxide.

Ehlers, K.W.; Leung, K.N.

1985-05-22T23:59:59.000Z

136

DECIGO: The Japanese space gravitational wave antenna  

Science Journals Connector (OSTI)

DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the planned Japanese space gravitational wave antenna, aiming to detect gravitational waves from astrophysically and cosmologically significant sources mainly between 0.1 Hz and 10 Hz and thus to open a new window for gravitational wave astronomy and for the universe. DECIGO will consist of three drag-free spacecraft, 1000 km apart from each other, whose relative displacements are measured by a differential Fabry-Perot interferometer. We plan to launch DECIGO in middle of 2020s, after sequence of two precursor satellite missions, DECIGO pathfinder and Pre-DECIGO, for technology demonstration required to realize DECIGO and hopefully for detection of gravitational waves from our galaxy or nearby galaxies.

Shuichi Sato; Seiji Kawamura; Masaki Ando; Takashi Nakamura; Kimio Tsubono; Akito Araya; Ikkoh Funaki; Kunihito Ioka; Nobuyuki Kanda; Shigenori Moriwaki; Mitsuru Musha; Kazuhiro Nakazawa; Kenji Numata; Shin-ichiro Sakai; Naoki Seto; Takeshi Takashima; Takahiro Tanaka; Kazuhiro Agatsuma; Koh-suke Aoyanagi; Koji Arai; Hideki Asada; Yoichi Aso; Takeshi Chiba; Toshikazu Ebisuzaki; Yumiko Ejiri; Motohiro Enoki; Yoshiharu Eriguchi; Masa-Katsu Fujimoto; Ryuichi Fujita; Mitsuhiro Fukushima; Toshifumi Futamase; Katsuhiko Ganzu; Tomohiro Harada; Tatsuaki Hashimoto; Kazuhiro Hayama; Wataru Hikida; Yoshiaki Himemoto; Hisashi Hirabayashi; Takashi Hiramatsu; Feng-Lei Hong; Hideyuki Horisawa; Mizuhiko Hosokawa; Kiyotomo Ichiki; Takeshi Ikegami; Kaiki T Inoue; Koji Ishidoshiro; Hideki Ishihara; Takehiko Ishikawa; Hideharu Ishizaki; Hiroyuki Ito; Yousuke Itoh; Nobuki Kawashima; Fumiko Kawazoe; Naoko Kishimoto; Kenta Kiuchi; Shiho Kobayashi; Kazunori Kohri; Hiroyuki Koizumi; Yasufumi Kojima; Keiko Kokeyama; Wataru Kokuyama; Kei Kotake; Yoshihide Kozai; Hideaki Kudoh; Hiroo Kunimori; Hitoshi Kuninaka; Kazuaki Kuroda; Kei-ichi Maeda; Hideo Matsuhara; Yasushi Mino; Osamu Miyakawa; Shinji Miyoki; Mutsuko Y Morimoto; Tomoko Morioka; Toshiyuki Morisawa; Shinji Mukohyama; Shigeo Nagano; Isao Naito; Kouji Nakamura; Hiroyuki Nakano; Kenichi Nakao; Shinichi Nakasuka; Yoshinori Nakayama; Erina Nishida; Kazutaka Nishiyama; Atsushi Nishizawa; Yoshito Niwa; Taiga Noumi; Yoshiyuki Obuchi; Masatake Ohashi; Naoko Ohishi; Masashi Ohkawa; Norio Okada; Kouji Onozato; Kenichi Oohara; Norichika Sago; Motoyuki Saijo; Masaaki Sakagami; Shihori Sakata; Misao Sasaki; Takashi Sato; Masaru Shibata; Hisaaki Shinkai; Kentaro Somiya; Hajime Sotani; Naoshi Sugiyama; Yudai Suwa; Rieko Suzuki; Hideyuki Tagoshi; Fuminobu Takahashi; Kakeru Takahashi; Keitaro Takahashi; Ryutaro Takahashi; Ryuichi Takahashi; Tadayuki Takahashi; Hirotaka Takahashi; Takamori Akiteru; Tadashi Takano; Keisuke Taniguchi; Atsushi Taruya; Hiroyuki Tashiro; Yasuo Torii; Morio Toyoshima; Shinji Tsujikawa; Yoshiki Tsunesada; Akitoshi Ueda; Ken-ichi Ueda; Masayoshi Utashima; Yaka Wakabayashi; Hiroshi Yamakawa; Kazuhiro Yamamoto; Toshitaka Yamazaki; Jun'ichi Yokoyama; Chul-Moon Yoo; Shijun Yoshida; Taizoh Yoshino

2009-01-01T23:59:59.000Z

137

ARM - Evaluation Product - Corrected Moments in Antenna Coordinates  

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

ProductsCorrected Moments in Antenna Coordinates ProductsCorrected Moments in Antenna Coordinates Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send Evaluation Product : Corrected Moments in Antenna Coordinates Site(s) SGP TWP General Description Raw moments from the scanning ARM precipitation radars (SAPRs) are subject to a number of instrumental and atmospheric phenomena that must be retrieved and corrected for. The Corrected Moments in Antenna Coordinates (CMAC) value-added product contains both raw data and fields that have been processed to: · correct for velocity aliasing · unfold and generate a cross-polarimetric phase difference that is monotonically increasing, removing impulses caused by non-uniform beam filling and phase shift on backscatter · recalculate specific differential phase using a 20-point Sobel filter on

138

Microsoft Word - mp_rotated_antenna_phasing-1.doc  

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

December 2, 2011 1 MP No. Subject: Evaluate Field-aligned Antenna Performance From: M.L. Garrett, S.J. Wukitch, Y. Lin, B. Lipschultz, R. Ochoukov, M.L. Reinke, J.L. Terry,...

139

Surface plasma source with saddle antenna radio frequency plasma generator  

SciTech Connect

A prototype RF H{sup -} surface plasma source (SPS) with saddle (SA) RF antenna is developed which will provide better power efficiency for high pulsed and average current, higher brightness with longer lifetime and higher reliability. Several versions of new plasma generators with small AlN discharge chambers and different antennas and magnetic field configurations were tested in the plasma source test stand. A prototype SA SPS was installed in the Spallation Neutron Source (SNS) ion source test stand with a larger, normal-sized SNS AlN chamber that achieved unanalyzed peak currents of up to 67 mA with an apparent efficiency up to 1.6 mA/kW. Control experiments with H{sup -} beam produced by SNS SPS with internal and external antennas were conducted. A new version of the RF triggering plasma gun has been designed. A saddle antenna SPS with water cooling is fabricated for high duty factor testing.

Dudnikov, V.; Johnson, R. P. [Muons, Inc., Batavia, Illinios 60510 (United States); Murray, S.; Pennisi, T.; Piller, C.; Santana, M.; Stockli, M.; Welton, R. [ORNL, Oak Ridge, Tennessee 37831 (United States)

2012-02-15T23:59:59.000Z

140

DNA-Directed Artificial Light-Harvesting Antenna  

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

DNA-Directed Artificial Light-Harvesting Antenna Authors: Dutta, P. K., Varghese, R., Nangreave, J., Lin, S., Yan, H., and Liu, Y. Title: DNA-Directed Artificial Light-Harvesting...

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


141

Mimicking the Role of the Antenna in Photosynthetic Photoprotection  

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

Mimicking the Role of the Antenna in Photosynthetic Photoprotection Authors: Terazono, Y., Kodis, G., Bhushan, K., Zaks, J., Madden, C., Moore, A. L., Moore, T. A., Fleming, G. R.,...

142

Assessment of a field-aligned ICRF antenna  

E-Print Network (OSTI)

Impurity contamination and localized heat loads associated with ion cyclotron range of frequency (ICRF) antenna operation are among the most challenging issues for ICRF utilization.. Another challenge is maintaining maximum ...

Wukitch, Stephen James

2014-01-01T23:59:59.000Z

143

Another Gold for PPPL: Laboratory Wins 2nd Gold GreenBuy Award | Princeton  

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

Another Gold for PPPL: Laboratory Wins 2nd Gold GreenBuy Award Another Gold for PPPL: Laboratory Wins 2nd Gold GreenBuy Award By Jeanne Jackson DeVoe September 23, 2013 Tweet Widget Facebook Like Google Plus One Teodora Todorova cleans a restroom with green products like HydroxiPro, which is 100 percent bio-based. The hand soap in PPPL's rest rooms is made mostly of vegetable-based glycerin and aloe. The paper products are made from 70 to 100 percent recycled products and the hand towels are composted at PPPL. Teodora Todorova cleans a restroom with green products like HydroxiPro, which is 100 percent bio-based. The hand soap in PPPL's rest rooms is made mostly of vegetable-based glycerin and aloe. The paper products are made from 70 to 100 percent recycled products and the hand towels are composted at PPPL. PPPL has received a gold GreenBuy award from the U.S. Department of Energy

144

Magnetism in Thiolated Gold Model Junctions  

Science Journals Connector (OSTI)

Magnetism in Thiolated Gold Model Junctions ... Nanoparticles revealing magnetism and their assemblies are of importance in nanotechnology and spintronics,(26, 27) in fundamental quantum-mechanical experiments,(28) and potentially in quantum computing. ... (47) Even though the magnetism has not yet been explicitly demonstrated in pure, neutral, and small thiolated AuNPs, it may be readily promoted by transition-metal doping of AuNP cores. ...

Mat Dubeck; Haibin Su

2012-07-24T23:59:59.000Z

145

Image-line voltage controlled oscillators and grating antennas  

E-Print Network (OSTI)

IMAGE-LINE VOLTAGE CONTROLLED OSCILLATORS AND GRATING ANTENNAS A Thesis by ALEXANDER MacDONALD KIRK Submitted to the Office of Graduate Studies of Texas ABM University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1991 Major Subject: Electrical Engineering IMAGE-LINE VOLTAGE CONTROLLED OSCILLATORS AND GRATING ANTENNAS A Thesis by ALEXANDER MacDONALD KIRK Approved as to style and content by: Kai Chang (Chair of Committee) Robert D. Nevels...

Kirk, Alexander MacDonald

1991-01-01T23:59:59.000Z

146

Equivalent radii of antennas with noncircular cross section  

E-Print Network (OSTI)

EQUIVALENT RADII OF ANTENNAS WITH NONCIRCULAR CROSS SECTION A Thesis By CHARLES WEN-HSUN SU Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE August 1960 Ma]or Sub)ect: Electrical Engineering EQUIVALENT RADII OF ANTENNAS WITH NONCIRCULAR CROSS SECTION A Thesis By CHARLES WEN-HSUN SU Approved as to style and content by: (C airman of Conunittee) (Head of Department...

Su, Charles Wen-Hsun

1960-01-01T23:59:59.000Z

147

Argonne CNM Highlight: Superparamagnetic Gold Nanoshells with Tunable  

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

Superparamagnetic Gold Nanoshells with Tunable Optical Properties Superparamagnetic Gold Nanoshells with Tunable Optical Properties Gold lNanoshells Gold Nanoshells TEM images showing the evolution of Au nanoshells after 12 cycles of seeded growth.; A solution-phase process has been developed by CNM users from the University of California at Riverside, working collaboratively with the Nanophotonics Group, for synthesizing stable multifunctional colloidal particles composed of a superparamagnetic Fe3O4 core, a gold nanoshell, and a mesoporous silica outer layer. The unique porous silica layer is produced by a surface-protected etching process. By tuning the pore structure of the silica networks through etching, the shape and size of the gold nanoparticles can be controlled during the seeded growth, as well as their interparticle plasmon coupling. Controllable interparticle coupling enables

148

Fabrication of water-soluble gold nanoparticle aggregates  

E-Print Network (OSTI)

Mixed monolayer protected gold nanoparticles were linked using octanedithiol to form aggregates containing hundreds of nanoparticles. These aggregates are an interesting material, posing potential applications in the fields ...

Bennett, Samantha E

2006-01-01T23:59:59.000Z

149

Structure of a Thiol Monolayer-Protected Gold Nanoparticle at...  

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

Thiol Monolayer-protected Gold Nanoparticle at 1.1 Resolution Nanometer-size metal particles are of fundamental interest for their chemical and quantum electronic properties,...

150

Electronic Structure of Thiol-Covered Gold Nanoparticles: Au102...  

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

Y., Galli, G., and Gygi, F. We present first principles, density functional theory (DFT) calculations of the structural and electronic properties of thiolate-protected gold...

151

Lichen Planus after Consumption of a Gold-Containing Liquor  

Science Journals Connector (OSTI)

...brands of gold-containing cinnamon schnapps are available in the United States. Analysis of five 750-ml bottles of the Goldschlager brand showed 8 to 17 mg of gold flakes per bottle. The metallic flakes were 75 percent gold by weight, with 280 ?g of gold per deciliter dissolved in the liquid portion... To the Editor: Idiopathic lichen planus is a pruritic papulosquamous eruption that typically occurs in middle-aged persons. The estimated prevalence of this disorder is less than 1 percent, and its cause is unclear.1 Drug-induced lichen planus has been ...

1996-02-29T23:59:59.000Z

152

Investigation of Gold Nanoparticle Inks for Low-Temperature Lead-Free Packaging Technology  

E-Print Network (OSTI)

Investigation of Gold Nanoparticle Inks for Low-Temperaturee-mail: tim_b@eecs.berkeley.edu Gold nanoparticle inks wereInvestigation of Gold Nanoparticle Inks for Low-Temperature

Bakhishev, Teymur; Subramanian, Vivek

2009-01-01T23:59:59.000Z

153

Collective Resonances in Gold Nanoparticle Arrays  

Science Journals Connector (OSTI)

We present experimental evidence of sharp spectral features in the optical response of 2D arrays of gold nanorods. A simple coupled dipole model is used to describe the main features of the observed spectral line shape. The resonance involves an interplay between the excitation of plasmons localized on the particles and diffraction resulting from the scattering by the periodic arrangement of these particles. We investigate this interplay by varying the particle size, aspect ratio, and interparticle spacing, and observe the effect on the position, width, and intensity of the sharp spectral feature.

Baptiste Augui and William L. Barnes

2008-09-30T23:59:59.000Z

154

Miniaturized Multi-Band Antenna via Element Collocation  

SciTech Connect

The resonant frequency of a microstrip patch antenna may be reduced through the addition of slots in the radiating element. Expanding upon this concept in favor of a significant reduction in the tuned width of the radiator, nearly 60% of the antenna metallization is removed, as seen in the top view of the antennas radiating element (shown in red, below, left). To facilitate an increase in the gain of the antenna, the radiator is suspended over the ground plane (green) by an air substrate at a height of 0.250? while being mechanically supported by 0.030? thick Rogers RO4003 laminate in the same profile as the element. Although the entire surface of the antenna (red) provides 2.45 GHz operation with insignificant negative effects on performance after material removal, the smaller square microstrip in the middle must be isolated from the additional aperture in order to afford higher frequency operation. A low insertion loss path centered at 2.45 GHz may simultaneously provide considerable attenuation at additional frequencies through the implementation of a series-parallel, resonant reactive path. However, an inductive reactance alone will not permit lower frequency energy to propagate across the intended discontinuity. To mitigate this, a capacitance is introduced in series with the inductor, generating a resonance at 2.45 GHz with minimum forward transmission loss. Four of these reactive pairs are placed between the coplanar elements as shown. Therefore, the aperture of the lower-frequency outer segment includes the smaller radiator while the higher frequency section is isolated from the additional material. In order to avoid cross-polarization losses due to the orientation of a transmitter or receiver in reference to the antenna, circular polarization is realized by a quadrature coupler for each collocated antenna as seen in the bottom view of the antenna (right). To generate electromagnetic radiation concentrically rotating about the direction of propagation, ideally one-half of the power must be delivered to the output of each branch with a phase shift of 90 degrees and identical amplitude. Due to this, each arm of the coupler is spaced ?/4 wavelength apart.

Martin, R. P.

2012-06-01T23:59:59.000Z

155

Argonne/EPA system captures mercury from air in gold shops |...  

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

Writing Internship Typical gold shop hood used to purify gold by superheating the goldmercury amalgam until the mercury vaporizes. The vaporized mercury is directed outside the...

156

Nanoscale Gold for Enhanced Protein Electrochemistry, Ebolavirus Immunosensors, and In Vivo Distribution Measurements.  

E-Print Network (OSTI)

??Different applications using gold at the nanoscale level are discussed in this dissertation. The first section includes relevant background into nanoparticles, specifically, monolayer protected gold (more)

Huffman, Brian Joseph

2009-01-01T23:59:59.000Z

157

Solving the Unsovlable: The Nanostructure of Gold at 1.1 Resolution  

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

ascertained their atomic structure (at 1.1 resolution). The gold-thiol nanoparticle consists of 102 gold atoms surrounded by 44 molecules of a thiol compound...

158

E-Print Network 3.0 - antenna packet radio Sample Search Results  

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

antenna selection methods for Mi- DAS. The packet... . The symbol-based method uses the PHY training symbols so that all antennas are assessed with a single packet... is for...

159

E-Print Network 3.0 - antenna test facility Sample Search Results  

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

test facility Search Powered by Explorit Topic List Advanced Search Sample search results for: antenna test facility Page: << < 1 2 3 4 5 > >> 1 Wireless@Virginia Tech Antennas and...

160

Analysis, Design, and Operation of a Spherical Inverted-F Antenna  

E-Print Network (OSTI)

This thesis presents the analysis, design, and fabrication of a spherical inverted-F antenna (SIFA). The SIFA consists of a spherically conformal rectangular patch antenna recessed into a quarter section of a metallic sphere. The sphere acts as a...

McDonald, Jacob J.

2010-07-14T23:59:59.000Z

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


161

E-Print Network 3.0 - active phased-array antennas Sample Search...  

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

RECTANGULAR SLOT ANTENNAS Summary: composed of rectan- gular slot antennas tuned with patch stubs. The 2D array of 32 32 ele- ments for phased-array... .interscience.wiley. com)....

162

E-Print Network 3.0 - antenna phased arrays Sample Search Results  

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

Wireless@Virginia Tech Antennas and Propagation Summary: on site. This includes simple patch antennas and complex wideband elements and arrays. Other types... of 50% up to 10:1....

163

E-Print Network 3.0 - antenna radio-fiber access Sample Search...  

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

MANUFACTURING TECHNOLOGY, VOL. 1, NO. 3, MARCH 2011 335 Packaging of PIN Photodiode on Patch Antenna Summary: 335 Packaging of PIN Photodiode on Patch Antenna for a Dual-Mode...

164

Boiler Gold Rush Prof. Johnny Brown (MATH 700)  

E-Print Network (OSTI)

Boiler Gold Rush Prof. Johnny Brown (MATH 700) jeb@math.purdue.edu #12;#12;#12;David McCullough, Jr help Always be prepared #12;Boiler Gold Rush Prof. Johnny Brown (MATH 700) jeb@math.purdue.edu #12;

Brown, Johnny E.

165

Evaluation of Hypervelocity Gold Nanoparticles for Nanovolume Surface Mass Spectrometry  

E-Print Network (OSTI)

in Figure VI-1 ................................................................................................ 166 VI-3 SI yields for samples containing various amounts of silver and gold on top of a PMMA film analyzed by massive gold clusters... and Bi+ ........ 169 VI-4 Negative mode mass spectrum from atomic-SIMS analysis of a PMMA surface ........................................................................................... 170 VI-5 Proposed structures for fragment ions...

DeBord, John 1986-

2012-08-16T23:59:59.000Z

166

Exhaust system having a gold-platinum group metal catalyst  

DOE Patents (OSTI)

A method of providing an exhaust treatment device is disclosed. The method includes applying a catalyst including gold and a platinum group metal to a particulate filter. The concentration of the gold and the platinum group metal is sufficient to enable oxidation of carbon monoxide and nitric oxide.

Ragle, Christie Susan (Havana, IL); Silver, Ronald G. (Peoria, IL); Zemskova, Svetlana Mikhailovna (Edelstein, IL); Eckstein, Colleen J. (Metamora, IL)

2011-12-06T23:59:59.000Z

167

SKARN GOLD MINERALIZATION AT THE GEODO MINE, SOUTH KOREA  

Science Journals Connector (OSTI)

...Communications SKARN GOLD MINERALIZATION AT THE GEODO MINE, SOUTH KOREA Eui-Jun Kim 1 Maeng-Eon Park 2 Noel C. White 3 Corresponding...Skarn gold mineralization at the Geodo Mine, South Korea Kim Eui-Jun Author Korea Institute of Geoscience and Mineral Resources...

Eui-Jun Kim; Maeng-Eon Park; Noel C. White

168

Sustained Storage and Transport of Hydraulic Gold Mining Sediment  

E-Print Network (OSTI)

Sustained Storage and Transport of Hydraulic Gold Mining Sediment in the Bear River, California L deposits of hydraulic gold mining sediment remain in main channels of the Bear River more than 100 years- sic model of sediment transport in a symmet- rical wave that is based on hydraulic mining sediment

James, L. Allan

169

Biomolecular Recognition Based on Single Gold Nanoparticle Light  

E-Print Network (OSTI)

Biomolecular Recognition Based on Single Gold Nanoparticle Light Scattering G. Raschke,* S. Kowarik of a single gold nanoparticle functionalized with biotin. Addition of streptavidin and subsequent specific binding events alter the dielectric environment of the nanoparticle, resulting in a spectral shift

Peters, Achim

170

Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain,  

Open Energy Info (EERE)

Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Humboldt County, Nevada Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Epithermal Gold Mineralization and a Geothermal Resource at Blue Mountain, Humboldt County, Nevada Abstract Shallow exploration drilling on the west flank of Blue Mountain discovered sub economic gold mineralization and a spatially associated active geothermal system. The gold mineralization is an unusual example of an acid sulfate type epithermal system developed in pre Tertiary sedimentary host rocks. The geothermal system is largely unexplored but is unusual in that surface manifestation s typically associated with active geothermal system are not present. Authors Andrew J. Parr and Timothy J. Percival

171

Going for the Gold (Computer), Again | Department of Energy  

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

Going for the Gold (Computer), Again Going for the Gold (Computer), Again Going for the Gold (Computer), Again June 1, 2011 - 1:41pm Addthis John Lippert As I mentioned in my March 3, 2009 blog, it wasn't easy to locate and buy an EPEAT Gold desktop computer when I was in the market nearly three years ago. (For those of you new to the scene, the Green Electronics Council Electronic Product Environmental Assessment Tool (EPEAT) rates electronic products based on 51 total environmental criteria: 23 required environmental performance criteria, plus an additional 28 optional criteria. Products are then rated Gold, Silver, or Bronze based on the optional criteria they meet. Meeting the ENERGY STAR® standard currently in effect is a minimum requirement; an additional point is earned if the product meets the more stringent standard that ENERGY STAR has developed

172

Newest Los Alamos facility receives LEED® Gold certification  

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

Newest facility receives LEED® Gold certification Newest facility receives LEED® Gold certification Newest Los Alamos facility receives LEED® Gold certification The Radiological Laboratory Utility Office Building is first to achieve both the Leadership in Energy and Environmental Design status and LEED Gold certification. June 13, 2012 Radiological Laboratory Utility Office Building Radiological Laboratory Utility Office Building Contact Kim Powell Communications Office (505) 695-6159 Email LOS ALAMOS, New Mexico, June 13, 2012-Los Alamos National Laboratory's newest facility, the Radiological Laboratory Utility Office Building (RLUOB), is also its first to achieve both the Leadership in Energy and Environmental Design (LEED) status and LEED Gold certification from the U.S. Green Building Council (USGBC).

173

Hoteliers Strike Gold with Geothermal Alaskan Resort | Department of Energy  

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

Hoteliers Strike Gold with Geothermal Alaskan Resort Hoteliers Strike Gold with Geothermal Alaskan Resort Hoteliers Strike Gold with Geothermal Alaskan Resort November 23, 2009 - 6:31pm Addthis Eric Barendsen Energy Technology Program Specialist, Office of Energy Efficiency and Renewable Energy What are the key facts? Bernie estimates he saves anywhere from $300,000 to $400,000 in electricity costs alone each year using geothermal power generators rather than diesel. Bernie Karl knows a gold mine when he sees one. In the 1970s, Bernie and his wife Connie moved to Alaska and mined gold in the frontier before eventually landing their dream job of running Chena Hot Springs Resort, just outside of Fairbanks. "We always wanted to own a hot springs," Bernie says. In 1998, Bernie bought the Chena Hot Springs Resort, and the 22-building

174

Hoteliers Strike Gold with Geothermal Alaskan Resort | Department of Energy  

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

Hoteliers Strike Gold with Geothermal Alaskan Resort Hoteliers Strike Gold with Geothermal Alaskan Resort Hoteliers Strike Gold with Geothermal Alaskan Resort November 23, 2009 - 6:31pm Addthis Eric Barendsen Energy Technology Program Specialist, Office of Energy Efficiency and Renewable Energy What are the key facts? Bernie estimates he saves anywhere from $300,000 to $400,000 in electricity costs alone each year using geothermal power generators rather than diesel. Bernie Karl knows a gold mine when he sees one. In the 1970s, Bernie and his wife Connie moved to Alaska and mined gold in the frontier before eventually landing their dream job of running Chena Hot Springs Resort, just outside of Fairbanks. "We always wanted to own a hot springs," Bernie says. In 1998, Bernie bought the Chena Hot Springs Resort, and the 22-building

175

A new electromagnetic code for ICRF antenna in EAST  

E-Print Network (OSTI)

The demand for an effective tool to help in the design of ion cyclotron radio frequency (ICRF) antenna system for fusion experiment has driven the development of predictive codes. A new electromagnetic code based on the method of moments (MOM) is described in the paper. The code computes the electromagnetic field by the solution of the electric field integral equation. The structure of ICRF antennas are discretized with triangular mesh. By using the new code, the scattering parameter and the surface current are given and compared with the result by commercial code CST. Moreover, the power spectra are studied with different toroidal phases for heating and current drive. Good agreement of simulation results between the new code and CST are obtained. The code has been validated against CST for EAST ICRF antenna.

Yang, Hua; Dong, Sa; Zhang, Xin-Jun; Zhao, Yan-Ping; Shang, Lei

2015-01-01T23:59:59.000Z

176

Intense emission of cluster anions from gold targets under impact of keV/u gold clusters.  

E-Print Network (OSTI)

Intense emission of cluster anions from gold targets under impact of keV/u gold clusters. M the emission yield of anionic clusters increases much faster with n than expected from simple proportionality. Accordingly, the most intense emission is observed for Au7 - : under Au9 + impact the Au7 - yield per incident

Boyer, Edmond

177

Novel Feeding Topologies for 2nd Harmonic Suppression in Broadband Microstrip Patch Antennas  

E-Print Network (OSTI)

Novel Feeding Topologies for 2nd Harmonic Suppression in Broadband Microstrip Patch Antennas *Il harmonic suppression property, while allowing for a broadband operation of microstrip patch antennas as well as a good 2nd harmonic suppression property. I. Introduction Microstrip patch antennas are very

Tentzeris, Manos

178

Integration of LED chip within patch antenna geometry for hybrid FSO/RF communication  

E-Print Network (OSTI)

Integration of LED chip within patch antenna geometry for hybrid FSO/RF communication J. Liao, A mode communi- cation transmitter using a LED integrated within the geometry of a planar patch antenna the geometry of the patch antenna to create a miniaturised LED/RF package. The RF channel can either work

Huang, Zhaoran "Rena"

179

FDTD Analysis of Patch Antennas on High Dielectric-Constant Substrates Surrounded  

E-Print Network (OSTI)

P42655 1 FDTD Analysis of Patch Antennas on High Dielectric-Constant Substrates Surrounded constant is the dominant mechanism affecting the radiation pattern of a patch antenna fabricated along the dielectric substrate, thus reducing the unwanted diffraction. Patch antennas surrounded

Tentzeris, Manos

180

A V-BAND MMIC OSCILLATOR ARRAY USING WIDE BAND MICROSTRIP PATCH ANTENNA  

E-Print Network (OSTI)

A V-BAND MMIC OSCILLATOR ARRAY USING WIDE BAND MICROSTRIP PATCH ANTENNA HONG-TUEK KIM, WOOYEOL CHOI in a push-pull mode was implemented using two 2-port patch antennas. When measured in a closed over]. In this paper, to improve this problem, we develop a modified wide band microstrip patch antenna and use

Kwon, Youngwoo

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


181

Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip Patch Antenna  

E-Print Network (OSTI)

Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip Patch Antenna Chae-Hyun Jung #1 circuit model for an H-shape cross slotted aperture-coupled microstrip patch antenna (ACMPA) are presented to design the antenna. The ACMPA consists of three conductor layers such as patch, ground plane, and feed

Myung, Noh-Hoon

182

Radiation-Pattern Improvement of Patch Antennas Using a Compact Soft/Hard Surface (SHS) Structure  

E-Print Network (OSTI)

Radiation-Pattern Improvement of Patch Antennas Using a Compact Soft/Hard Surface (SHS) Structure is employed to surround the patch antenna for blocking the surface- wave propagation, thus alleviating-fired ceramics (LTCC) technology. It is shown that the gain of a patch antenna can be increased to near 9 d

Tentzeris, Manos

183

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

E-Print Network (OSTI)

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

Park, Seong-Ook

184

Trace element fingerprinting of ancient Chinese gold with femtosecond laser  

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

Trace element fingerprinting of ancient Chinese gold with femtosecond laser Trace element fingerprinting of ancient Chinese gold with femtosecond laser ablation-inductivity coupled mass spectrometry Title Trace element fingerprinting of ancient Chinese gold with femtosecond laser ablation-inductivity coupled mass spectrometry Publication Type Journal Article Year of Publication 2009 Authors Brostoff, Lynn B., Jhanis J. Gonzalez, Paul Jett, and Richard E. Russo Journal Journal of Archeological Science Volume 36 Start Page 461 Issue 2 Pagination 461-466 Date Published 02/2009 Keywords Ancient gold, femtosecond, la-icp-ms, Trace element Abstract In this collaborative investigation, femtosecond laser ablation-inductively coupled mass spectrometry (LA-ICP-MS) was applied to the study of a remarkable group of ancient Chinese gold objects in the Smithsonian's Freer Gallery of Art and Arthur M. Sackler Gallery. Taking advantage of the superior ablation characteristics and high precision of a femtosecond 266 nm Ti:sapphire laser at Lawrence Berkeley National Laboratory, major, minor and trace element concentrations in the gold fragments were quantified. Results validate use of femtosecond LA-ICP-MS for revealing ''fingerprints'' in minute gold samples. These fingerprints allow us to establish patterns based on the association of silver, palladium and platinum that support historical, technical and stylistic relationships, and shed new light on these ancient objects.

185

Plasmonic effect of gold nanoparticles in organic solar cells  

Science Journals Connector (OSTI)

Abstract Light trapping, due to the embedding of metallic nanoparticles, has been shown to be beneficial for a better photoabsorption in organic solar cells. Researchers in plasmonics and in the organic photovoltaics fields are working together to improve the absorption of sunlight and the photonelectron coupling to boost the performance of the devices. Recent advances in the field of plasmonics for organic solar cells focus on the incorporation of gold nanoparticles. This article reviews the different methods to produce and embed gold nanoparticles into organic solar cells. In particular, concentration, size and geometry of gold nanoparticles are key factors that directly influence the light absorption in the devices. It is shown that a careful choice of size, concentration and location of gold nanoparticles in the device result in an enhancement of the power conversion efficiencies when compared to standard organic solar cell devices. Our latest results on gold nanoparticles embedded in on organic solar cell devices are included. We demonstrate that embedded gold nanoparticles, created by depositing and annealing a gold film on transparent electrode, generate a plasmonic effect which can be exploited to increase the power conversion efficiency of a bulk heterojunction solar cell up to 10%.

Marco Notarianni; Kristy Vernon; Alison Chou; Muhsen Aljada; Jinzhang Liu; Nunzio Motta

2014-01-01T23:59:59.000Z

186

22 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 2, 2003 Efficiency of a Resistively Loaded Microstrip Patch  

E-Print Network (OSTI)

Microstrip Patch Antenna S. V. Hum, Student Member, IEEE, J. Z. Chu, R. H. Johnston, Senior Member, IEEE on the performance of a microstrip patch antenna. While resistively loaded antennas offer the benefit of large of a quarter-wave patch antenna has been proposed as an effective method of increasing the bandwidth

Hum, Sean Victor

187

Improved Precision Measurement of the Casimir Force Using Gold Surfaces  

E-Print Network (OSTI)

We report an improved precision measurement of the Casimir force using metallic gold surfaces. The force is measured between a large gold coated sphere and flat plate using an Atomic Force Microscope. The use of gold surfaces removes some theoretical uncertainties in the interpretation of the measurement. The forces are also measured at smaller surface separations. The complete dielectric spectrum of the metal is used in the comparison of theory to the experiment. The average statistical precision remains at the same 1% of the forces measured at the closest separation. These results should lead to the development of stronger constraints on hypothetical forces.

B. W. Harris; F. Chen; U. Mohideen

2000-05-21T23:59:59.000Z

188

Surface contamination effects on resistance of gold nanowires  

SciTech Connect

Gold nanowires were patterned with e-beam lithography and fabricated with a gold film deposited by e-beam evaporation. The resistances of these wires were measured and found to be nonlinear with respect to surface area/volume. With x-ray photoelectron spectroscopy analysis, carbon and oxygen contaminants in the forms of C, C-O-C, and C=O were found adsorbed on the gold surface. This contamination adsorbed on the surface may lead to increased resistance of nanowires.

Lilley, Carmen M.; Huang, Qiaojian [Department of Mechanical and Industrial Engineering, University of Illinois at Chicago, 842 W. Taylor Street (MC 251), Chicago, Illinois 60607 (United States)

2006-11-13T23:59:59.000Z

189

Electrically long vertical interconnects for microwave circuits and antennas  

E-Print Network (OSTI)

. . . . . 2 . . . . 3 . . . . 4 . 4 . 4 . 5 . . . . 5 . . . . 6 . . . . 7 A. Transmission Line Interconnects. . B. Electromagnetically Coupled lnterconnects . . . . . C. Conclusions . . . . . . 8 . . . 10 III FIDELITY SIMULATION 12 A. B. C. D... interconnects satisfying specifications set by Raytheon Systems Co. This research was sponsored by Raytheon Systems Co. RF/Microwave Division. A vertical interconnect couples transmission lines, antennas, and components between vertically spaced layers...

Coutant, Matthew Richard

2012-06-07T23:59:59.000Z

190

Adaptive MAC Protocol for UAV Communication Networks Using Directional Antennas  

E-Print Network (OSTI)

Adaptive MAC Protocol for UAV Communication Networks Using Directional Antennas Abdel Ilah Alshbatat and Liang Dong, Senior Member, IEEE Abstract-- Unmanned aerial vehicle (UAV) has been used inspection and range extension. Moreover, UAVs are suited for situations that are too dangerous for direct

Dong, Liang

191

Demo Abstract: MARVEL: Multiple Antenna based Relative Vehicle Localizer  

E-Print Network (OSTI)

to install especially on existing vehicles and exhibit a tradeoff between accuracy and cost. Similarly, usingDemo Abstract: MARVEL: Multiple Antenna based Relative Vehicle Localizer Dong Li , Tarun Bansal , Zhixue Lu and Prasun Sinha Department of Computer Science and Engineering The Ohio State University

Sinha, Prasun

192

Embedded-Circuit Magnetic Metamaterial Substrate Performance for Patch Antennas  

E-Print Network (OSTI)

Embedded-Circuit Magnetic Metamaterial Substrate Performance for Patch Antennas Kevin Buell and Computer Science University of Michigan Ann Arbor, MI 48109-2122, USA E-mail: kbuell@umich.edu, hosseinm@umich.edu, saraband@eecs.umicb.edu Abstract Magnetic permeabilitywas imparted to a naturally non-magnetic materialby

Sarabandi, Kamal

193

Impulse testing of corporate-fed patch array antennas  

Science Journals Connector (OSTI)

This paper discusses a novel method for detecting faults in antenna arrays. The method, termed Impulse Testing, was developed for corporate-fed patch arrays where the element is fed by a probe and is shorted at its center. Impulse Testing was devised ...

Neil F. Chamberlain

2011-03-01T23:59:59.000Z

194

A New Excitation Technique for Wideband Short Backfire Antennas  

E-Print Network (OSTI)

Papapolymerou, Joy Laskar, and Manos M. Tentzeris Georgia Electronic Design Center School of Electrical the impedance bandwidth and to lower the manufacturing cost of a short backfire antenna (SBA). The new or cable connection), the cost-effectiveness of a wireless deployment is a big issue of concern. Also

Tentzeris, Manos

195

Possibilities of Phased Array Antenna (PAA) for Fusion  

SciTech Connect

Principles of the design and optimal choice of the PAA scheme for fusion researches are considered on the base of high power microwave antennas. Results of the analysis of the electromagnetic field structure in dependence on PAA sizes and radiator type are given.

Shubov, Anatoly G.; Shishlov, Alexander V.; Ganin, Sergey A. [Company 'APEX', 10, Geroev Panfilovtsev St., Moscow (Russian Federation)

2007-09-28T23:59:59.000Z

196

A simple Conducting Wire for Decoupling Neighbouring Antennas  

E-Print Network (OSTI)

and good resistance to the marine environment. This paper is dedicated to the installation of antennas separation between them. Looking for elementary solutions we propose to use a simple conducting wire rather is described as a lumped element circuit composed of a capacitance in series with a resistance

Paris-Sud XI, Université de

197

JGI Sets 'Gold Standard' for Metagenomic Data Analysis  

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

14, 2007 14, 2007 DOE JGI Sets 'Gold Standard' for Metagenomic Data Analysis WALNUT CREEK, CA--With the advent of more powerful and economical DNA sequencing technologies, gene discovery and characterization is transitioning from single-organism studies to revealing the potential biotechnology applications embedded in communities of microbial genomes, or metagenomes. The field of metagenomics is still in its infancy--the equivalent of the early days of the California Gold Rush, with labs vying to stake their claim. Amidst the prospecting, the call has been issued for methods to separate fool's gold from the real nuggets. Such a gold standard has now been provided through work led by the U.S. Department of Energy Joint Genome Institute (DOE JGI) with colleagues from Oak Ridge National Laboratory and

198

Federal Electronics Challenge Gold Award | Department of Energy  

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

Federal Electronics Challenge Gold Award Federal Electronics Challenge Gold Award Federal Electronics Challenge Gold Award June 18, 2009 - 12:24pm Addthis Left to right: EPA Assistant Administrator Jim Jones, Jeff Eagan, Brian Costlow, Kathy Loftin, Tony Castellano, and Kevin Cooke. (photo courtesy of EPA) Left to right: EPA Assistant Administrator Jim Jones, Jeff Eagan, Brian Costlow, Kathy Loftin, Tony Castellano, and Kevin Cooke. (photo courtesy of EPA) On June 18th, DOE Headquarters was presented the Federal Electronics Challenge Gold Award for exemplary performance in Green Computing, including green procurement, energy efficient operations and maintenance, and environmentally safe disposition of surplus equipment. Receiving the award from EPA Assistant Administrator Jim Jones (left) was the

199

Bacterium Helps in the Formation of Gold | Advanced Photon Source  

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

Creating a Precise Atomic-Scale Map of Quantum Dots Creating a Precise Atomic-Scale Map of Quantum Dots Getting to the Roots of Lethal Hairs Stressing Out the Twins in Magnesium Size-Related Behavior of Anatase Nanocrystals under Extreme Pressure Boron-Based Compounds Trick a Biomedical Protein 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 Bacterium Helps in the Formation of Gold OCTOBER 13, 2009 Bookmark and Share Top: An ultra-thin section of C. metallidurans containing a gold nanoparticle. Bottom: This image shows maps of pure gold with other elements. By determining what elements there are, scientists can see where the gold is located in relation to the cells. These maps are quantitative

200

Newest LANL Facility Receives LEED Gold Certification | National Nuclear  

National Nuclear Security Administration (NNSA)

Newest LANL Facility Receives LEED Gold Certification | National Nuclear Newest LANL Facility Receives LEED Gold Certification | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Newest LANL Facility Receives LEED Gold Certification Newest LANL Facility Receives LEED Gold Certification Posted By Office of Public Affairs RULOB LANL's newest facility, the Radiological Laboratory Utility Office

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


201

DOE - Office of Legacy Management -- Humphreys Gold Co - FL 08  

Office of Legacy Management (LM)

Humphreys Gold Co - FL 08 Humphreys Gold Co - FL 08 FUSRAP Considered Sites Site: Humphreys Gold Co. (FL.08 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: Jacksonville , Florida FL.08-1 Evaluation Year: 1987 FL.08-2 FL.08-3 Site Operations: Processed monazite ore in the 1950s. FL.08-3 Site Disposition: Eliminated - No Authority - No AEC involvement at the site FL.08-2 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Thorium FL.08-1 Radiological Survey(s): No Site Status: Eliminated from consideration under FUSRAP Also see Documents Related to Humphreys Gold Co. FL.08-1 - AEC Memorandum; Edmonds to McCarvill; Subject: Monazite Dredging Operations and Placer Deposits Containing Thorium Minerals; June

202

Hanford Treatment Facility Achieves First Gold Ranking for Sustainable  

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

Treatment Facility Achieves First Gold Ranking for Treatment Facility Achieves First Gold Ranking for Sustainable Design in EM Complex: New groundwater treatment facility will be Hanford's largest, greenest pump-and-treat system Hanford Treatment Facility Achieves First Gold Ranking for Sustainable Design in EM Complex: New groundwater treatment facility will be Hanford's largest, greenest pump-and-treat system May 1, 2012 - 12:00pm Addthis Workers use a lift to access part of the 200 West Groundwater Treatment Facility. Workers use a lift to access part of the 200 West Groundwater Treatment Facility. Pump-and-treat construction managers David Fink (left) and Delise Pargmann (right) review information for the LEED gold certification of the main process building for the 200 West Groundwater Treatment Facility.

203

Geology of the Florida Canyon gold deposit, Pershing County,...  

Open Energy Info (EERE)

Nevada, in: Gold and Silver Deposits of Western Nevada Authors Hastings, J.S., Burkhart, T.H., and Richardson and R.E. Published Geological Society of Nevada 1993 fall field trip...

204

Eyeing Oil, Synthetic Biologists Mine Microbes for Black Gold  

Science Journals Connector (OSTI)

...Black gold. Algae (below) produce...converted into biodiesel. CREDITS...converted to biodiesel. But the technology...need to harvest algae from large...as renewable biodiesel. Instead of growing their algae outside in the...

Robert F. Service

2008-10-24T23:59:59.000Z

205

Scott Samuelson receives NNSA's Gold Medal of Excellence | National...  

National Nuclear Security Administration (NNSA)

(APM), recently presented the Gold Medal of Excellence to Scott Samuelson, Senior Advisor for APM. The medal is the highest honorary award granted by NNSA and was presented to...

206

2D-3D transition of gold cluster anions resolved  

Science Journals Connector (OSTI)

Small gold cluster anions Aun? are known for their unusual two-dimensional (2D) structures, giving rise to properties very different from those of bulk gold. Previous experiments and calculations disagree about the number of gold atoms nc where the transition to 3D structures occurs. We combine trapped ion electron diffraction and state of the art electronic structure calculations to resolve this puzzle and establish nc=12. It is shown that theoretical studies using traditional generalized gradient functionals are heavily biased towards 2D structures. For a correct prediction of the 2D-3D crossover point it is crucial to use density functionals yielding accurate jellium surface energies, such as the Tao-Perdew-Staroverov-Scuseria (TPSS) functional or the Perdew-Burke-Ernzerhof functional modified for solids (PBEsol). Further, spin-orbit effects have to be included, and large, flexible basis sets employed. This combined theoretical-experimental approach is promising for larger gold and other metal clusters.

Mikael P. Johansson; Anne Lechtken; Detlef Schooss; Manfred M. Kappes; Filipp Furche

2008-05-19T23:59:59.000Z

207

Midway Gold picks Jacobs for Nevada mining project  

Science Journals Connector (OSTI)

Jacobs Engineering Group Inc has been selected by Midway Gold Corp for front-end engineering of infrastructure related to the Pan Mine Project in White Pine County, Nevada, USA.

2012-01-01T23:59:59.000Z

208

Chiral Plasmonic Films Formed by Gold Nanorods and Cellulose Nanocrystals  

Science Journals Connector (OSTI)

Chiral plasmonic films have been prepared by incorporating gold nanorods (NRs) in a macroscopic cholesteric film formed by self-assembled cellulose nanocrystals (CNCs). Composite NR-CNC films revealed strong plasmonic chiroptical activity, dependent on ...

Ana Querejeta-Fernndez; Grgory Chauve; Myriam Methot; Jean Bouchard; Eugenia Kumacheva

2014-03-03T23:59:59.000Z

209

Peruvian Gold Rush Threatens Health and the Environment  

Science Journals Connector (OSTI)

Peruvian Gold Rush Threatens Health and the Environment ... Mercury vapor released when the amalgam is heated can be inhaled, the most dangerous exposure route for humans, or precipitates out and settles on streets or in watersheds. ...

Barbara Fraser

2009-09-29T23:59:59.000Z

210

Photothermal Properties of Hollow Gold Nanostructures for Cancer Theranostics  

Science Journals Connector (OSTI)

Cancer theranostic agents are defined as integrated platforms, which can combine the tumor diagnosis, therapeutic, or even therapeutic evaluation functions in one system. Hollow gold (Au) nanostructures have been...

Liangran Guo; Yajuan Li; Zeyu Xiao; Wei Lu

2014-01-01T23:59:59.000Z

211

Cancer theranostics: multifunctional gold nanoparticles for diagnostics and therapy.  

E-Print Network (OSTI)

??Doctorate in Biology, Specialty in Biotechnology The use of gold nanoparticles (AuNPs) has been gaining momentum in molecular diagnostics due to their unique physico-chemical properties (more)

Conde, Joo Diogo Osrio de Castro

2013-01-01T23:59:59.000Z

212

Goldphosphineporphyrin as potential metal-based theranostics  

Science Journals Connector (OSTI)

Two new gold-phosphine-porphyrin derivatives were synthesized and fully characterized, and their photophysical properties investigated along a water-soluble analog. The cytotoxicity of the compounds was tested...

Semra Tasan; Cynthia Licona

2014-12-01T23:59:59.000Z

213

Antenna-coupled high T[sub c] superconducting microbolometer  

DOE Patents (OSTI)

A device is provided for measuring radiant energy, the device comprising a substrate; a bolometer formed from a high T[sub c] superconducting material disposed on the substrate in an area that is about 1[times]5 [mu]m[sup 2] and about 0.02 [mu]m in depth; and a planar antenna disposed on the substrate and coupled to receive radiation and to impart the received radiation to the bolometer. 5 figs.

Hu, Q.

1992-12-15T23:59:59.000Z

214

Density profile sensitivity study of ASDEX Upgrade ICRF Antennas with the TOPICA code  

SciTech Connect

During operation of the ASDEX Upgrade (AUG) ion cyclotron radio frequency (ICRF) system, Tungsten (W)-coated poloidal limiters and structures connected along magnetic field lines to the antenna can be sources of W, which is attributed to sputtering by ions accelerated in radio frequency (RF) sheaths. In order to analyze and optimize the ICRF antenna performance, accurate and efficient simulation tools are necessary. TOPICA code was developed for analysis of ICRF antenna systems with plasma loading conditions modeled with ID FELICE code. This paper presents an initial comparative analysis of two AUG ICRF antennas for a set of model plasma density profiles (with varying density gradient and antenna cut-off distance). The antennas are presently installed in AUG and differ in that one was partially optimized using HFSS code to reduce E{sub ||} near fields. Power transferred to plasma and sheath driving RF potentials are computed.

Krivska, A. [Associazione EURATOM-ENEA sulla fusione, CR-Frascati, Frascati, Rome (Italy); Czech Technical University, Telecommunication Engineering Department, Prague (Czech Republic); Ceccuzzi, S.; Tuccillo, A. A. [Associazione EURATOM-ENEA sulla fusione, CR-Frascati, Frascati, Rome (Italy); Milanesio, D.; Maggiora, R. [Department of Electronics, Politecnico di Torino, Torino (Italy); Bobkov, V.; Braun, F. [Max Planck-Institut fuer Plasmaphysik, Euratom Association, Garching (Germany); Noterdaeme, J.-M. [Max Planck-Institut fuer Plasmaphysik, Euratom Association, Garching (Germany); University of Gent, EESA Department, Gent (Belgium)

2011-12-23T23:59:59.000Z

215

Method of making radio frequency ion source antenna  

DOE Patents (OSTI)

In the method, the radio frequency (RF) antenna is made by providing a clean coil made of copper tubing or other metal conductor, which is coated with a tacky organic binder, and then with a powdered glass frit, as by sprinkling the frit uniformly over the binder. The coil is then heated internally in an inert gas atmosphere, preferably by passing an electrical heating current along the coil. Initially, the coil is internally heated to about 200.degree. C. to boil off the water from the binder, and then to about 750.degree. C.-850.degree. C. to melt the glass frit, while also burning off the organic binder. The melted frit forms a molten glass coating on the metal coil, which is then cooled to solidify the glass, so that the metal coil is covered with a thin continuous homogeneous impervious glass coating of substantially uniform thickness. The glass coating affords complete electrical insulation and complete dielectric protection for the metal coil of the RF antenna, to withstand voltage breakdown and to prevent sputtering, while also doubling the plasma generating efficiency of the RF antenna, when energized with RF power in the vacuum chamber of an ion source for a particle accelerator or the like. The glass frit preferably contains apprxoimately 45% lead oxide.

Ehlers, Kenneth W. (Alamo, CA); Leung, Ka-Ngo (Hercules, CA)

1988-01-01T23:59:59.000Z

216

Miniaturized Multi-Band Antenna via Element Collocation  

SciTech Connect

Although much research has been performed on a driven element parasitically loaded by another element shorted to ground for dual frequency operation, the novel concept of two or more coplanar-driven elements in close proximity designed for multiple frequency operation has not been represented in the literature. Since each higher frequency antenna is built into the lower frequency elements, the largest element controls the structures total size. Furthermore, by using the self-resonant frequency inherent in reactive elements due to device packaging, the aperture of each antenna, due to a low insertion loss path at the frequency of the larger element, will include that of all smaller radiators. This configuration provides a large standing wave ratio at the shorter wavelengths via several series capacitive-inductive connections. Therefore, each antenna element provides the required surface area for the frequency of operation while being isolated from the larger radiators. For this study, a dual 2.45/5.8 GHz microstrip patch encompasses a small surface area of 9 square inches and provides circularly polarized electromagnetic radiation in excess of 6 dBi. This concept can be extrapolated to include additional radiators or may be scaled to other frequencies of interest.

Martin, R. P.

2012-04-19T23:59:59.000Z

217

Analysis and design of terahertz antennas based on plasmonic resonant graphene sheets  

SciTech Connect

Resonant graphene antennas used as true interfaces between terahertz (THz) space waves and a source/detector are presented. It is shown that in addition to the high miniaturization related to the plasmonic nature of the resonance, graphene-based THz antenna favorably compare with typical metal implementations in terms of return loss and radiation efficiency. Graphene antennas will contribute to the development of miniature, efficient, and potentially transparent all-graphene THz transceivers for emerging communication and sensing application.

Tamagnone, M. [Adaptive MicroNano Wave Systems, LEMA/Nanolab, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne (Switzerland); Laboratory of Electromagnetics and Acoustics (LEMA), Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne (Switzerland); Gomez-Diaz, J. S.; Perruisseau-Carrier, J. [Adaptive MicroNano Wave Systems, LEMA/Nanolab, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne (Switzerland); Mosig, J. R. [Laboratory of Electromagnetics and Acoustics (LEMA), Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne (Switzerland)

2012-12-01T23:59:59.000Z

218

Miniaturized Multi-Band Antenna Design via Element Collocation and Inductive Feed Loading  

SciTech Connect

In a FY09 SDRD project, four separate antennas were designed to receive signals of interest covering a broad range of frequencies. While the elements exceeded specifications, the array footprint is substantial. Research performed by the CU Microwave Active Antenna Group in collaboration with RSL, showed promise in realizing a reduced structure. This work will expand upon this previous research. This project will result in a prototype quad-band antenna.

Martin, R. P.

2012-09-12T23:59:59.000Z

219

Parallel particle swarm optimization and finite-difference time-domain (PSO/FDTD) algorithm for multiband and wide-band patch antenna designs  

E-Print Network (OSTI)

rectangular u-slot microstrip patch antennas, IEEE Trans.Samii, Wide-band E-shaped patch antennas for wirelessand T. S. Bird, E-shaped patch antennas for high- speed

Jin, N B; Rahmat-Samii, Y

2005-01-01T23:59:59.000Z

220

Joint Routing, Scheduling And Power Control For Multihop Wireless Networks With Multiple Antennas  

E-Print Network (OSTI)

We consider the problem of Joint Routing, Scheduling and Power-control (JRSP) problem for multihop wireless networks (MHWN) with multiple antennas. We extend the problem and a (sub-optimal) heuristic solution method for JRSP in MHWN with single antennas. We present an iterative scheme to calculate link capacities(achievable rates) in the interference environment of the network using SINR model. We then present the algorithm for solving the JRSP problem. This completes a feasible system model for MHWN when nodes have multiple antennas. We show that the gain we achieve by using multiple antennas in the network is linear both in optimal performance as well as heuristic algorithmic performance.

Vangala, Harish; Sharma, Prof Vinod

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

E-Print Network 3.0 - antennae galaxies ngc Sample Search Results  

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

Physics 2 John E. Hibbard National Radio Summary: John E. Hibbard National Radio Astronomy Observatory The Antennae Galaxies: Archetype for Colliding... Galaxies 12;The...

222

E-Print Network 3.0 - acts spacecraft antenna Sample Search Results  

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

enclosure and spacecraft, as discussed in the text... (antenna enclosure, spacecraft, solar panels, etc.). This is a short circuit to the measurement... spacecraft, which uses...

223

E-Print Network 3.0 - antenna measurement facilities Sample Search...  

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

The design details, radiation characteristics and measurement results of the electric... antenna for all of the ... Source: Ziolkowski, Richard W. - Department of...

224

E-Print Network 3.0 - antenna positioning analysis Sample Search...  

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

PROPAGATION LETTERS, VOL. 2, 2003 Efficiency of a Resistively Loaded Microstrip Patch Summary: . The antenna efficiency will be evaluated in four different ways. First, a...

225

E-Print Network 3.0 - antennas promotes light Sample Search Results  

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

, Antonije R. Djordjevic, and Arye Nehorai, Fellow, IEEE Abstract--Microstrip (patch) antennas usually Source: Nehorai, Arye - Department of Electrical Engineering,...

226

E-Print Network 3.0 - antenna theory Sample Search Results  

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

PROPAGATION LETTERS, VOL. 2, 2003 Efficiency of a Resistively Loaded Microstrip Patch Summary: , P. S. Hall, and C. Wood, Microstrip Antenna Theory and Design. Stevenage,...

227

E-Print Network 3.0 - antenna architectures based Sample Search...  

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

of Toronto Collection: Engineering 19 Abstract--The analysis of equiangular triangular patch antennas is conducted to determine the mutual coupling Summary: be at coordinate 4, or...

228

Influence of solar heating on the performance of integrated solar cell microstrip patch antennas  

SciTech Connect

The integration of microstrip patch antennas with photovoltaics has been proposed for applications in autonomous wireless communication systems located on building facades. Full integration was achieved using polycrystalline silicon solar cells as both antenna ground plane and direct current power generation in the same device. An overview of the proposed photovoltaic antenna designs is provided and the variation characterised of the electromagnetic properties of the device with temperature and solar radiation. Measurements for both copper and solar antennas are reported on three different commercial laminates with contrasting values for thermal coefficient of the dielectric constant. (author)

Roo-Ons, M.J.; Shynu, S.V.; Ammann, M.J. [Antenna and High Frequency Research Centre, School of Electronic and Communications Engineering, Dublin Institute of Technology (Ireland); Seredynski, M. [Institute of Heat Engineering, Warsaw University of Technology (Poland); McCormack, S.J. [Dept. of Civil, Structural and Environmental Engineering, Trinity College Dublin (Ireland); Norton, B. [Dublin Energy Lab., Focas Institute, Dublin Institute of Technology (Ireland)

2010-09-15T23:59:59.000Z

229

E-Print Network 3.0 - antenna waveguide plasma Sample Search...  

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

antenna, the TTD... by trimming the non-dispersive waveguide. Thus, at o the main ... Source: Chen, Ray - Department of Electrical and Computer Engineering, University of Texas...

230

E-Print Network 3.0 - antenna accessories Sample Search Results  

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

Here we limit our attention to the evolution of accessory antenna... A (from heliobacte- ria), and PscA (from green sulfur bacteria). ... Source: Haig, David - Department of...

231

Adsorption of Ethylene on Neutral, Anionic and Cationic Gold Clusters  

E-Print Network (OSTI)

The adsorption of ethylene molecule on neutral, anionic and cationic gold clusters consisting of up to 10 atoms has been investigated using density-functional theory. It is demonstrated that C2H4 can be adsorbed on small gold clusters in two different configurations, corresponding to the pi- and di-sigma-bonded species. Adsorption in the pi-bonded mode dominates over the di-sigma mode over all considered cluster sizes n, with the exception of the neutral C2H4-Au5 system. A striking difference is found in the size-dependence of the adsorption energy of C2H4 bonded to the neutral gold clusters in the pi and di-sigma configurations. The important role of the electronic shell effects in the di-sigma mode of ethylene adsorption on neutral gold clusters is demonstrated. It is shown that the interaction of C2H4 with small gold clusters strongly depends on their charge. The typical shift in the vibrational frequencies of C2H4 adsorbed in the pi- and the di-sigma configurations gives a guidance to experimentally disti...

Lyalin, Andrey

2009-01-01T23:59:59.000Z

232

Argonne CNM Highlight: Damping of acoustic vibrations in gold nanoparticles  

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

Damping of acoustic vibrations in gold nanoparticles Damping of acoustic vibrations in gold nanoparticles Nanopatterning of STO Vibrations in nanostructures offer applications in molecular-scale biological sensing and ultrasensitive mass detection. To approach single-atom sensing, it is necessary to reduce the dimensions of the structures to the nanometer scale while preserving long-lived vibrations. This requires an understanding of how vibrations in nanoscale objects are damped - or lose their energy to the fluid surroundings and within themselves. Researchers have used fast laser pulses to produce and probe high-frequency vibrations in metal nanoparticles. However, significant variations in particle dimensions complicate measurements. By studying bipyramid-shaped gold nanoparticles with highly uniform sizes

233

For Spitzer building, green is gold | Princeton Plasma Physics Lab  

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

For Spitzer building, green is gold For Spitzer building, green is gold By Patti Wieser May 26, 2011 Tweet Widget Facebook Like Google Plus One The Lyman Spitzer Building. (Photo by Elle Starkman, PPPL Office of Communications) The Lyman Spitzer Building. Gallery: Keith Rule (Photo by Elle Starkman, PPPL Office of Communications) Keith Rule Shawn Connolly, Adam Cohen, William Gervasi. (Photo by Elle Starkman, PPPL Office of Communications) Shawn Connolly, Adam Cohen, William Gervasi. The Lyman Spitzer Building, the main administration building at the U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL), has been certified LEED gold, one of the highest environmental distinctions for buildings. "We are delighted to receive this designation for the Lyman Spitzer Building - or LSB - from the U.S. Green Building Council," said Adam

234

Going for the Gold (Computer) | Department of Energy  

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

for the Gold (Computer) for the Gold (Computer) Going for the Gold (Computer) March 3, 2009 - 4:00am Addthis John Lippert Last summer I decided to bite the bullet and buy a new computer. My old one was getting sluggish. I had purchased the original one about 10 years earlier and had upgraded various components every several years. But it was still showing its age. I wanted another desktop. It was a no brainer that it had to be an ENERGY STAR® model, both computer and monitor. But selecting one was not that simple. You see, I know that the ENERGY STAR criteria are constantly changing, requiring manufacturers to make their units more and more efficient. The stricter ENERGY STAR Version 5.0 Specification for Computers, for example, will go into effect on July 1, 2009. Though the new

235

Fresh Air That's as Good as Gold | Department of Energy  

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

Fresh Air That's as Good as Gold Fresh Air That's as Good as Gold Fresh Air That's as Good as Gold July 8, 2013 - 5:25pm Addthis Brookhaven Lab physicists Peter Sutter, Eli Sutter,and Xiao Tong (left to right) with one of the Center for Functional Nanomaterials instruments used to characterize the new nanoparticle structures. | Photo courtesy of Brookhaven National Lab. Brookhaven Lab physicists Peter Sutter, Eli Sutter,and Xiao Tong (left to right) with one of the Center for Functional Nanomaterials instruments used to characterize the new nanoparticle structures. | Photo courtesy of Brookhaven National Lab. Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science What are the key facts? Car engines produce traces of carbon monoxide, but they use catalytic converters to reduce that pollutant and others, such as nitrogen

236

The Genomes OnLine Database (GOLD) v.4: status of genomic and metagenomic projects and their associated metadata  

E-Print Network (OSTI)

new metagenome advanced search option under the available. 2. Advanced Search, where the extra in GOLDs advanced search engine, graphical

Pagani, Ioanna

2012-01-01T23:59:59.000Z

237

E-Print Network 3.0 - abu marawat gold Sample Search Results  

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

Um Balad, 3 Fatira, 4 Abu Marawat, 5 Semma, 6... - posed in the Eastern Desert of Egypt have long been known to host gold, with more than 95 occurrences so... vein gold...

238

E-Print Network 3.0 - artisanal gold miners Sample Search Results  

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

their gold... 2008 JEL classification: Q30 Q38 Q56 Keywords: Artisanal mining Gold Fair Trade Participation Ghana a b... at the heart of the problems faced by ... Source:...

239

In situ SEM and ToF-SIMS analysis of IgG conjugated gold nanoparticles...  

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

SEM and ToF-SIMS analysis of IgG conjugated gold nanoparticles at aqueous surfaces. In situ SEM and ToF-SIMS analysis of IgG conjugated gold nanoparticles at aqueous surfaces....

240

Gold Nanoparticle Platform for Protein-Protein Interactions and Drug Discovery  

Science Journals Connector (OSTI)

Gold nanoparticles (AuNPs) have been used in biological assays for decades in agglutination assays, radioactive assays, and in pregnancy tests (Geoghegan et al. 1980...). In these earlier colloidal gold assays, a...

Dr. Cynthia Bamdad Ph.D.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Method for forming gold-containing catalyst with porous structure  

DOE Patents (OSTI)

A method for forming a gold-containing catalyst with porous structure according to one embodiment of the present invention includes producing a starting alloy by melting together of gold and at least one less noble metal that is selected from the group consisting of silver, copper, rhodium, palladium, and platinum; and a dealloying step comprising at least partial removal of the less noble metal by dissolving the at least one less noble metal out of the starting alloy. Additional methods and products thereof are also presented.

Biener, Juergen; Hamza, Alex V; Baeumer, Marcus; Schulz, Christian; Jurgens, Birte; Biener, Monika M.

2014-07-22T23:59:59.000Z

242

DOI: 10.1002/cctc.201200311 Low-Temperature Chemoselective Gold-Surface-Mediated Hydrogenation of  

E-Print Network (OSTI)

.[9] Claus found that, in the production of allyl alco- hol from the hydrogenation of acrolein, gold

Henkelman, Graeme

243

Implementation of smart antenna API and transceiver API in software communication architecture for a wireless innovation forum standard  

Science Journals Connector (OSTI)

This study presents an implementation of the standard smart antenna (SA) application programming interface (API) and Transceiver API developed by the wireless innovation forums ... smart antenna working group (S...

June Kim; Chiyoung Ahn; Seungwon Choi

2011-12-01T23:59:59.000Z

244

Mutual Coupling Reduction between Closely Spaced U-slot Patch Antennas by Optimizing Array Configuration and its Applications in MIMO  

E-Print Network (OSTI)

is to find the array configuration that providesthe minimum mutual coupling between elements. The U-slot patch antenna is versatile antennas that because of its features like wide bandwidth,multi-band resonance and the ease of achieving different...

Niakan, Nahal

2014-05-31T23:59:59.000Z

245

welcome to university residences Boiler Gold Rush Check-In...........................Saturday, August 13 and  

E-Print Network (OSTI)

welcome to university residences #12;Boiler Gold Rush Check-In...........................Saturday, August 13 and Sunday, August 14, 2011 Boiler Gold Rush residence hall systems in the United States. weLcomE! 1 #12;Boiler GoLD Rush ParticiPants Your regular

Fernández-Juricic, Esteban

246

Experimental observation of narrow surface plasmon resonances in gold nanoparticle arrays  

E-Print Network (OSTI)

Experimental observation of narrow surface plasmon resonances in gold nanoparticle arrays Yizhuo surface plasmons in two-dimensional gold nanoparticle arrays in water leads to narrow near that the gold nanoparticle arrays exhibit near-field electric field intensity E2 enhancements approximately one

247

Direct Functionalization of Arenes by Primary Alcohol Sulfonate Esters Catalyzed by Gold(III)  

E-Print Network (OSTI)

operating here. For electron-rich arenes, a gold(III)- mediated reaction, which seems to go through an SN2 in mediating reactions involving alkynes. In contrast, gold-catalyzed arene functionalization has been less also discovered a gold-catalyzed alkylation of arenes by epoxides.2b We report here a unique reaction

He, Chuan

248

Non-motor, efferent electrical activity in the antenna of the water-striderGerris paludum (Hemiptera, Insecta)  

Science Journals Connector (OSTI)

1. In the antenna ofGerris two forms of bipolar, extracellular single action potentials have been recorded: nega...

Helmut Bohn

1975-01-01T23:59:59.000Z

249

Comparison of spaced-antenna baseline wind estimators: Theoretical and simulated results  

E-Print Network (OSTI)

Comparison of spaced-antenna baseline wind estimators: Theoretical and simulated results Richard J), Comparison of spaced-antenna baseline wind estimators: Theoretical and simulated results, Radio Sci., 39, RS November 2003; published 22 January 2004. [1] Formulas for the theoretical precision of cross-beam winds

Zhang, Guifu

250

Cite this: Lab Chip, 2013, 13, 2883 A frequency reconfigurable antenna based on digital  

E-Print Network (OSTI)

microfluidics Received 26th February 2013, Accepted 28th May 2013 DOI: 10.1039/c3lc50275a www.rsc.org/loc Yasin on electrowetting based digital microfluidics to implement a frequency reconfigurable antenna operating in the X antenna, which is monolithically integrated with a microfluidic chip. This chip establishes

Cetiner, Bedri A.

251

Proposal of an Arc Detection Technique Based on RF Measurements for the ITER ICRF Antenna  

SciTech Connect

RF arc detection is a key operational and safety issue for the ICRF system on ITER. Indeed the high voltages inside the antenna put it at risk of arcing, which could cause substantial damage. This paper describes the various possibilities explored by circuit simulation and the strategy now considered to protect the ITER ICRF antenna from RF arcs.

Huygen, S.; Dumortier, P.; Durodie, F.; Messiaen, A.; Vervier, M.; Vrancken, M. [LPP/ERM-KMS, Association EURATOM-Belgian State, Brussels (Belgium); Wooldridge, E. [EURATOM/CCFE Fusion Association, Culham Science Centre (United Kingdom)

2011-12-23T23:59:59.000Z

252

Self-Optimization of Antenna Tilt and Pilot Power for Dedicated Channels  

E-Print Network (OSTI)

Self-Optimization of Antenna Tilt and Pilot Power for Dedicated Channels Abstract-- In Radio Access Networks (RAN), fixed configurations result in poor network efficiency. This sub- optimal performance present a framework for a self-optimizing RAN, which adapts Antenna Tilt and Pilot Power according

Paris-Sud XI, Université de

253

Stored energies in electric and magnetic current densities for small antennas  

E-Print Network (OSTI)

Electric and magnetic currents are essential to describe electromagnetic stored energy, as well as the associated quantities of antenna Q and the partial directivity to antenna Q-ratio, D/Q, for general structures. The upper bound of previous D/Q-results for antennas modeled by electric currents is accurate enough to be predictive, this motivates us here to extend the analysis to include magnetic currents. In the present paper we investigate antenna Q bounds and D/Q-bounds for the combination of electric- and magnetic-currents, in the limit of electrically small antennas. This investigation is both analytical and numerical, and we illustrate how the bounds depend on the shape of the antenna. We show that the antenna Q can be associated with the largest eigenvalue of certain combinations of the electric and magnetic polarizability tensors. The results are a fully compatible extension of the electric only currents, which come as a special case. The here proposed method for antenna Q provides the minimum Q-value...

Jonsson, B L G

2014-01-01T23:59:59.000Z

254

Magnetically Switchable Shorted Patch Antenna Sheikh Sharif Iqbal, Khaled Y. Al-Qurashi  

E-Print Network (OSTI)

Magnetically Switchable Shorted Patch Antenna Sheikh Sharif Iqbal, Khaled Y. Al-Qurashi King Fahd, shorting post, Microstrip Patch ABSTRACT: Switchable magnetic media and shorting posts are popular, a ferrite based shorted patch antenna is designed to demonstrate magnetically switchable frequency response

Iqbal, Sheikh Sharif

255

Design of Compact Stacked-Patch Antennas in LTCC multilayer packaging modules for Wireless Applications  

E-Print Network (OSTI)

Design of Compact Stacked-Patch Antennas in LTCC multilayer packaging modules for Wireless: 404-894-3360 Fax: 404-894-4641 Abstract A simple procedure for the design of compact stacked-patch module was proposed for compact RF front-end, which is integrated with a patch antenna [2]. However

Tentzeris, Manos

256

CASING EFFECTS ON THE RADIATION PERFORMANCE OF A CIRCULARLY POLARIZED PATCH ANTENNA  

E-Print Network (OSTI)

CASING EFFECTS ON THE RADIATION PERFORMANCE OF A CIRCULARLY POLARIZED PATCH ANTENNA K. Rambabu, H on the radiation characteristics of a miniaturized patch antenna for circular polarization. Different scenarios DESIGN Using a multiple resonance technique [4] for broadband performance, a circularly polarized patch

Bornemann, Jens

257

A Novel "Green" Inkjet-Printed Monopole Antenna Topology for Concurrent RFID and Cellular Communications  

E-Print Network (OSTI)

"green" inkjet-printed monopole antenna topology for integrated RFID-reader and cellular communicationA Novel "Green" Inkjet-Printed Monopole Antenna Topology for Concurrent RFID and Cellular Communications Zissis Konstas*(l), Konstantinos Katsibas(2) and Manos M. Tentzeris(l) (1) School of

Tentzeris, Manos

258

The circular loop antenna over a lossy dielectric slab  

E-Print Network (OSTI)

interfaces. The method of moments is employed to solve the resulting 1ntegral equations for the current distribut1on on the loop. With the current distribution determined, the input impedance and input admit- tance are calculated. The electromagnetic f1... of the current density can be neglected. For the loop antenna, the surface current density can be written as (2. 3a) where $' = cos(4 - $') f + sin(4 - 4 ')p (2. 3b) In developing an integral equation to represent the loop, the observation point is located...

Overly, Michael Robert

2012-06-07T23:59:59.000Z

259

Nonlinear Photon-Assisted Tunneling Transport in Optical Gap Antennas  

Science Journals Connector (OSTI)

(16, 17) For instance, incoming photons can exchange energy with tunneling charges modifying thus the conductance of the barrier(18, 19) and strong-field effects were recently reported. ... (32) The height ? of the potential barriers can be directly deduced from these two minima. ... Two lock-in amplifiers referenced at Fmod and 2Fmod output a signal proportional to the differential conductance I? = Vac(?Ib/?Vb) of the gap antenna and signal proportional to the nonlinearity of the conductance I? = 1/4Vac2(?2Ib/?Vb2), respectively. ...

Arnaud Stolz; Johann Berthelot; Marie-Maxime Mennemanteuil; Grard Colas des Francs; Laurent Markey; Vincent Meunier; Alexandre Bouhelier

2014-04-03T23:59:59.000Z

260

Integration of Miniaturized Patch Antennas with High Dielectric-Constant Multilayer Packages and Soft-and-Hard Surfaces (SHS)  

E-Print Network (OSTI)

Integration of Miniaturized Patch Antennas with High Dielectric-Constant Multilayer Packages) is employed to suppress the surface wave generated by a patch antenna integrated with high dielectric capability of the SHS in surface-wave suppression. The first is a stacked patch antenna on a large

Tentzeris, Manos

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Small Folded Shorted-Patch Antenna R. L. Li, E. Tsai, G. DeJean, M. Tentzeris, and J. Laskar  

E-Print Network (OSTI)

Small Folded Shorted-Patch Antenna R. L. Li, E. Tsai, G. DeJean, M. Tentzeris, and J. Laskar School. microstrip patch antennas, have a significant number of advantages over conventional antennas, such as low- wave (0/2, 0 is the guide wavelength in the substrate) patch. The most straightforward approach

Tentzeris, Manos

262

Coupling characteristics of the ITER relevant lower hybrid antenna in Tore Supra: experiments and modelling  

SciTech Connect

A new concept of lower hybrid antenna for current drive has been proposed for ITER [Bibet et al, Nuclear Fusion 1995]: the Passive Active Multijunction (PAM) antenna that relies on a periodic combination of active and passive waveguides. An actively cooled PAM antenna at 3.7 GHz has been recently installed on the tokamak Tore Supra. The paper summarizes the comprehensive experimental characterization of the linear coupling properties of the PAM antenna to the Tore Supra plasmas. These experimental results are systematically compared with the linear wave coupling theory via the linear ALOHA code. Good agreement between experimental results and ALOHA have been obtained. The detailed validation of the coupling modelling is an important step toward the validation of the PAM concept in view of further optimizing the electromagnetic properties of the future ITER antenna.

Preynas, M.; Ekedahl, A.; Fedorczak, N.; Goniche, M.; Guilhem, D.; Gunn, J. P.; Hillairet, J.; Litaudon, X. [CEA, IRFM, 13108 Saint Paul lez Durance (France); Associacao Euratom-IST, Centro de Fusao Nuclear 1049-001 Lisboa (Portugal)

2011-12-23T23:59:59.000Z

263

Gold Nanoparticle-Based Sensing of "Spectroscopically Silent" Heavy Metal  

E-Print Network (OSTI)

of aqueous heavy metal ions, including toxic metals such as lead, cadmium, and mercury, is describedLetters Gold Nanoparticle-Based Sensing of "Spectroscopically Silent" Heavy Metal Ions Youngjin Kim that by functionalizing metal nanoparticles with appropriate heavy-metal ion receptors, the particles might be coaxed

264

Enhanced radiative heat transfer between nanostructured gold plates  

E-Print Network (OSTI)

We compute the radiative heat transfer between nanostructured gold plates in the framework of the scattering theory. We predict an enhancement of the heat transfer as we increase the depth of the corrugations while keeping the distance of closest approach fixed. We interpret this effect in terms of the evolution of plasmonic and guided modes as a function of the grating's geometry.

R. Gurout; J. Lussange; F. S. S. Rosa; J. -P. Hugonin; D. A. R. Dalvit; J. -J. Greffet; A. Lambrecht; S. Reynaud

2012-03-07T23:59:59.000Z

265

Antenna mechanism of length control of actin cables  

E-Print Network (OSTI)

Actin cables are linear cytoskeletal structures that serve as tracks for myosin-based intracellular transport of vesicles and organelles in both yeast and mammalian cells. In a yeast cell undergoing budding, cables are in constant dynamic turnover yet some cables grow from the bud neck toward the back of the mother cell until their length roughly equals the diameter of the mother cell. This raises the question: how is the length of these cables controlled? Here we describe a novel molecular mechanism for cable length control inspired by recent experimental observations in cells. This antenna mechanism involves three key proteins: formins, which polymerize actin, Smy1 proteins, which bind formins and inhibit actin polymerization, and myosin motors, which deliver Smy1 to formins, leading to a length-dependent actin polymerization rate. We compute the probability distribution of cable lengths as a function of several experimentally tuneable parameters such as the formin-binding affinity of Smy1 and the concentration of myosin motors delivering Smy1. These results provide testable predictions of the antenna mechanism of actin-cable length control.

Lishibanya Mohapatra; Bruce L. Goode; Jane Kondev

2014-11-15T23:59:59.000Z

266

Argonne CNM Highlight: Gold nanoparticles create visible-light catalysis in  

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

Silver chloride-gold nanoparticles Gold-coated silver chloride (AgCl) nanowires at the microscopic level. In the News United Press International | PhysOrg.com | R&D Magazine| Nanotechnology Now | Photonics.com Gold nanoparticles create visible-light catalysis in nanowires A two-step approach has been developed within the Nanophotonics Group to synthesize AgCl nanowires decorated with gold nanoparticles by using silver nanowires as chemical templates. In the first step, the silver nanowires are chemically oxidized and converted to AgCl nanowires. In the second step, ions generated in the first step reduce gold precursors (e.g., NaAuCl4) to deposit gold nanoparticles on the AgCl nanowire surfaces, resulting in the formation of AgCl:gold composite nanowires. Because of the

267

Argonne CNM Highlight: Solvent-Mediated End-to-End Assembly of Gold  

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

Solvent-Mediated End-to-End Assembly of Gold Nanorods Solvent-Mediated End-to-End Assembly of Gold Nanorods gold nanorods Transmission-electron-microscope image of 70-nm-long gold nanorods assembled end to end via solvent-mediated interactions. CNM scientists have developed a new method for the controlled end-to-end assembly of rod-shaped gold nanoparticles. The nanoparticles are synthesized chemically using an established technique, producing high-quality gold nanorods with lengths of approximately 70 nm and diameters of approximately 15 nm, stabilized in water by hydrophilic surfactant molecules. The sides of the rods are better protected by the surfactants than the ends, so that when additional ligand molecules that bind to gold are added to the solution, they preferentially attach to the ends of the rods. If these ligands are hydrophobic, then the rods will

268

PII S0016-7037(98)00209-9 Gold solubility and speciation in hydrothermal solutions: Experimental study of the  

E-Print Network (OSTI)

and deposition of gold in ore-forming processes. The most important ligands in hydrothermal gold-bearing soPII S0016-7037(98)00209-9 Gold solubility and speciation in hydrothermal solutions: Experimental Science Ltd 1. INTRODUCTION Field and mineralogical studies of hydrothermal gold deposits demonstrate

Paris-Sud XI, Université de

269

Nano-particle trapping by optically induced Dielectrophoresis enhanced by nano-antennas  

Science Journals Connector (OSTI)

We demonstrate experimentally trapping and manipulation of 50nm gold nanoparticles suspended in Isopropanol using dielectrophoretic (DEP) forces induced by illuminating arrays of...

Yifat, Yuval; Eitan, Michal; Scheuer, Jacob

270

New chemistry with gold-nitrogen complexes: synthesis and characterization of tetra-, tri-, and dinuclear gold(I) amidinate complexes. Oxidative-addition to the dinuclear gold(I) amidinate  

E-Print Network (OSTI)

catalyst precursors for CO oxidation on TiO2 surface reported to date (87% conversion). The dinuclear gold(I) amidinate complex with a Au Au distance of 2.711(3) is rare. To our knowledge, there is only one other example of a symmetrical dinuclear gold...

Abdou, Hanan Elsayed

2009-06-02T23:59:59.000Z

271

Fluidic patch antenna based on liquid metal alloy/single-wall carbon-nanotubes operating at the S-band frequency  

E-Print Network (OSTI)

Fluidic patch antenna based on liquid metal alloy/single-wall carbon-nanotubes operating at the S) This letter describes the fabrication and characterization of a fluidic patch antenna operating at the S in antenna technologies,1­3 including mobile communications,4 compact high gain patch antenna,5

272

Development of internal-antenna-driven large-area RF plasma sources using multiple low-inductance antenna units  

Science Journals Connector (OSTI)

Large-area and high-density radio frequency (RF) plasmas at 13.56 \\{MHz\\} have been produced by inductive coupling of internal-type low-inductance antenna units. The present study has been carried out to develop the basic discharge techniques which can be applied to production of meter-scale large-area and/or large-volume plasma sources with high density for a variety of plasma processes. The plasma source could be operated stably to attain plasma density as high as 11012 cm?3 at argon pressures of approximately 1 Pa. It has been demonstrated that high plasma density can be obtained efficiently using the low-inductance internal antenna configuration with effectively suppressed electrostatic coupling. Discharge experiments in a meter-scale chamber demonstrated uniform plasma production with densities as high as 61011 cm?3 at an argon pressure of 1.3 Pa and a RF power of 4 kW.

Y. Setsuhara; T. Shoji; A. Ebe; S. Baba; N. Yamamoto; K. Takahashi; K. Ono; S. Miyake

2003-01-01T23:59:59.000Z

273

Characteristics of a novel lower hybrid wave antenna for the TST-2 spherical tokamak  

SciTech Connect

A new type of traveling wave antenna which excites the lower hybrid wave directly was developed. This antenna is similar to the inductively-coupled combline antenna in that only the first element of the antenna array is excited externally, and subsequent elements are excited passively by mutual coupling between adjacent elements. The main difference is that whereas the inductively-coupled combline antenna makes use of mutual inductance, the presently proposed antenna makes use of mutual capacitance. The radiating elements are located at the voltage maximum, and the electric field induced in the plasma is in the toroidal direction rather than the poloidal direction, matching the polarization of the lower hybrid wave. Optimization studies were carried out to obtain a band-pass characteristic centered around 200 MHz, and a unidirectional wavenumber spectrum with the parallel index of refraction corresponding to approximately 5. Plasma current ramp-up to 2 kA has been achieved on the TST-2 spherical tokamak with 12 kW of RF power at 200 MHz during the initial experimental period using this antenna. Further optimization studies are being performed.

Takase, Y.; Shinya, T.; Wakatsuki, T.; Ejiri, A.; Furui, H.; Hiratsuka, J.; Imamura, K.; Inada, T.; Kakuda, H.; Nakamura, K.; Nakanishi, A.; Oosako, T.; Sonehara, M.; Togashi, H.; Tsuda, S.; Tsujii, N.; Yamaguchi, T. [The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa 277-8561 (Japan); Moeller, C. P. [General Atomics, San Diego, CA 92186 (United States)

2014-02-12T23:59:59.000Z

274

Gold Camp, Arizona: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Gold Camp, Arizona: Energy Resources Gold Camp, Arizona: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 33.3786732°, -111.4395128° 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":33.3786732,"lon":-111.4395128,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

275

Guided Self-Assembly of Gold Thin Films  

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

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

276

Guided Self-Assembly of Gold Thin Films  

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

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

277

Guided Self-Assembly of Gold Thin Films  

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

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

278

Abraham Presents Secretary's Gold Award to Edward Teller  

Office of Scientific and Technical Information (OSTI)

26, 2002 26, 2002 Abraham Presents Secretary's Gold Award to Edward Teller LIVERMORE, CALIF. - Secretary of Energy Spencer Abraham today presented Dr. Edward Teller, Director Emeritus of the Lawrence Livermore National Laboratory, with the Secretary's Gold Award in recognition of his outstanding contributions to science and the security of the nation. The award is the Energy Department's highest honorary award and includes a plaque with citation, a medallion and a rosette. Secretary Abraham presented Dr. Teller with the award during his visit to the laboratory. "Dr. Teller is one of the giant figures of the 20th century, whose contributions to winning both World War II and the Cold War are immeasurable," Abraham told lab employees. "But I believe that Edward

279

Guided Self-Assembly of Gold Thin Films  

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

Guided Self-Assembly of Gold Thin Films Print Guided Self-Assembly of Gold Thin Films Print Nanoparticles-man-made atoms with unique optical, electrical, and mechanical properties-have become key components in many fields of science. If nanoparticles could be coaxed into routinely assembling themselves into predictable complex structures and hierarchical patterns, devices could be mass-produced that are one thousand times smaller than today's microtechnologies. Berkeley Lab and UC Berkeley scientists have made progress toward this goal, successfully directing the self--assembly of nanoparticles into device-ready thin films, which have potential applications in fields ranging from computer memory storage to energy harvesting and storage, from catalysis to light management, and into the emerging new field of plasmonics.

280

Near-field heat transfer between gold nanoparticle arrays  

SciTech Connect

The radiative heat transfer between gold nanoparticle layers is presented using the coupled dipole method. Gold nanoparticles are modelled as effective electric and magnetic dipoles interacting via electromagnetic fluctuations. The effect of higher-order multipoles is implemented in the expression of electric polarizability to calculate the interactions at short distances. Our findings show that the near-field radiation reduces as the radius of the nanoparticles is increased. Also, the magnetic dipole contribution to the heat exchange becomes more important for larger particles. When one layer is displayed in parallel with respect to the other layer, the near-field heat transfer exhibits oscillatory-like features due to the influence of the individual nanostructures. Further details about the effect of the nanoparticles size are also discussed.

Phan, Anh D., E-mail: anhphan@mail.usf.edu [Department of Physics, University of South Florida, Tampa, Florida 33620 (United States); Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Ba Dinh, Hanoi 10000 (Viet Nam); Phan, The-Long, E-mail: ptlong2512@yahoo.com [Department of Physics, Chungbuk National University, Cheongju 361-763 (Korea, Republic of); Woods, Lilia M. [Department of Physics, University of South Florida, Tampa, Florida 33620 (United States)

2013-12-07T23:59:59.000Z

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


281

Method of making gold thiolate and photochemically functionalized microcantilevers  

DOE Patents (OSTI)

Highly sensitive sensor platforms for the detection of specific reagents, such as chromate, gasoline and biological species, using microcantilevers and other microelectromechanical systems (MEMS) whose surfaces have been modified with photochemically attached organic monolayers, such as self-assembled monolayers (SAM), or gold-thiol surface linkage are taught. The microcantilever sensors use photochemical hydrosilylation to modify silicon surfaces and gold-thiol chemistry to modify metallic surfaces thereby enabling individual microcantilevers in multicantilever array chips to be modified separately. Terminal vinyl substituted hydrocarbons with a variety of molecular recognition sites can be attached to the surface of silicon via the photochemical hydrosilylation process. By focusing the activating UV light sequentially on selected silicon or silicon nitride hydrogen terminated surfaces and soaking or spotting selected metallic surfaces with organic thiols, sulfides, or disulfides, the microcantilevers are functionalized. The device and photochemical method are intended to be integrated into systems for detecting specific agents including chromate groundwater contamination, gasoline, and biological species.

Boiadjiev, Vassil I. (Knoxville, TN) [Knoxville, TN; Brown, Gilbert M. (Knoxville, TN) [Knoxville, TN; Pinnaduwage, Lal A. (Knoxville, TN) [Knoxville, TN; Thundat, Thomas G. (Knoxville, TN) [Knoxville, TN; Bonnesen, Peter V. (Knoxville, TN) [Knoxville, TN; Goretzki, Gudrun (Nottingham, GB) [Nottingham, GB

2009-08-25T23:59:59.000Z

282

Gold-based electrical interconnections for microelectronic devices  

DOE Patents (OSTI)

A method of making an electrical interconnection from a microelectronic device to a package, comprising ball or wedge compression bonding a gold-based conductor directly to a silicon surface, such as a polysilicon bonding pad in a MEMS or IMEMS device, without using layers of aluminum or titanium disposed in-between the conductor and the silicon surface. After compression bonding, optional heating of the bond above 363 C. allows formation of a liquid gold-silicon eutectic phase containing approximately 3% (by weight) silicon, which significantly improves the bond strength by reforming and enhancing the initial compression bond. The same process can be used for improving the bond strength of Au--Ge bonds by forming a liquid Au-12Ge eutectic phase.

Peterson, Kenneth A. (Albuquerque, NM); Garrett, Stephen E. (Albuquerque, NM); Reber, Cathleen A. (Corrales, NM); Watson, Robert D. (Tijeras, NM)

2002-01-01T23:59:59.000Z

283

Depinning of Atomically Thin Kr Films on Gold  

Science Journals Connector (OSTI)

We have employed the quartz-crystal microbalance technique to measure the sliding friction of krypton films physisorbed on gold. By slowly increasing the amplitude of the substrate oscillations, we have observed a sharp transition from a film locked to the substrate to a sliding one. This transistion is characterized by hysteresis both in dissipation and inertial mass as the amplitude is decreased. Finally, the dependence of this transition on film coverage has been studied in some detail.

L. Bruschi; A. Carlin; G. Mistura

2002-01-14T23:59:59.000Z

284

Microsoft Word - CX-AlveyPascoSnoh-HF-Antenna_WEB.docx  

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

1, 2013 1, 2013 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Roger Thomas Project Manager - TECT-CSB-1 Proposed Action: Install high frequency antennas at Bonneville Power Administration (BPA) maintenance headquarters PP&A Project No.: 2,600 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.19 Microwave, meteorological, and radio towers Locations: Multiple; including BPA's Alvey, Pasco, and Snohomish maintenance headquarters Proposed by: BPA Description of the Proposed Action: BPA proposes to install high frequency radio antennas within existing BPA maintenance headquarters sites. Antenna design varies by site, but generally the small antennas will be mounted between 20-35 feet above the ground using one or

285

E-Print Network 3.0 - antennae galaxies arp Sample Search Results  

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

Search Sample search results for: antennae galaxies arp Page: << < 1 2 3 4 5 > >> 1 Astronomy 422 Lecture 12: Galactic Evolution I Summary: sequence, many are peculiar. Arp made...

286

Thermal tuning of mid-infrared plasmonic antenna arrays using a phase change material  

Science Journals Connector (OSTI)

We demonstrate that the resonances of infrared plasmonic antennas can be tuned or switched on/off by taking advantage of the thermally driven insulator-to-metal phase transition in...

Kats, Mikhail A; Blanchard, Romain; Genevet, Patrice; Yang, Zheng; Qazilbash, M Mumtaz; Basov, D N; Ramanathan, Shriram; Capasso, Federico

2013-01-01T23:59:59.000Z

287

Porcelain-coated antenna for radio-frequency driven plasma source  

DOE Patents (OSTI)

A new porcelain-enamel coated antenna creates a clean plasma for volume or surface-conversion ion sources. The porcelain-enamel coating is hard, electrically insulating, long lasting, non fragile, and resistant to puncture by high energy ions in the plasma. Plasma and ion production using the porcelain enamel coated antenna is uncontaminated with filament or extraneous metal ion because the porcelain does not evaporate and is not sputtered into the plasma during operation. Ion beams produced using the new porcelain-enamel coated antenna are useful in ion implantation, high energy accelerators, negative, positive, or neutral beam applications, fusion, and treatment of chemical or radioactive waste for disposal. For ion implantation, the appropriate species ion beam generated with the inventive antenna will penetrate large or small, irregularly shaped conducting objects with a narrow implantation profile.

Leung, Ka-Ngo (Hercules, CA); Wells, Russell P. (Kensington, CA); Craven, Glen E. (Fremont, CA)

1996-01-01T23:59:59.000Z

288

Porcelain-coated antenna for radio-frequency driven plasma source  

DOE Patents (OSTI)

A new porcelain-enamel coated antenna creates a clean plasma for volume or surface-conversion ion sources. The porcelain-enamel coating is hard, electrically insulating, long lasting, non fragile, and resistant to puncture by high energy ions in the plasma. Plasma and ion production using the porcelain enamel coated antenna is uncontaminated with filament or extraneous metal ions because the porcelain does not evaporate and is not sputtered into the plasma during operation. Ion beams produced using the new porcelain-enamel coated antenna are useful in ion implantation, high energy accelerators, negative, positive, or neutral beam applications, fusion, and treatment of chemical or radioactive waste for disposal. For ion implantation, the appropriate species ion beam generated with the inventive antenna will penetrate large or small, irregularly shaped conducting objects with a narrow implantation profile. 8 figs.

Leung, K.N.; Wells, R.P.; Craven, G.E.

1996-12-24T23:59:59.000Z

289

The Study and Implementation of Electrically Small Printed Antennas for an Integrated Transceiver Design  

E-Print Network (OSTI)

pattern characteristics. For our purposes, return loss is measured using the S11-port reflection coefficient which helps characterize how efficiently the small antenna is able to be fed. Operational bandwidth is measured as the frequency range over which...

Speer, Peter Clark

2009-01-01T23:59:59.000Z

290

Capacity Enhancement Based on Using AdaptiveAntenna Arrays OptimizedforTrunking Efficiency  

E-Print Network (OSTI)

will achieve the greatest performance benefit. One approach for utilizing smart antenna arrays has been-cell network where each BS is equipped with an adaptive array. The hexagonal grid is used to illustrate

Howitt, Ivan

291

Superconducting nanowire single-photon detectors integrated with optical nano-antennae  

E-Print Network (OSTI)

Optical nano-antennae have been integrated with semiconductor lasers to intensify light at the nanoscale and photodiodes to enhance photocurrent. In quantum optics, plasmonic metal structures have been used to enhance ...

Berggren, Karl K.

292

Exploiting Reconfigurable Antennas in Communication Systems with Delay-Sensitive Applications  

E-Print Network (OSTI)

in the literature to counteract fading effects. This work is motivated by recent advances in fast reconfigurable antennas, which provide new means to change the statistical profile of fading channels, and hence reduce the probability of prolonged fades. Fast...

Hammad, Eman

2012-02-14T23:59:59.000Z

293

A Non-Pyramidal Rectangular-to-Trough Waveguide Transition and Pattern Reconfigurable Trough Waveguide Antenna  

E-Print Network (OSTI)

, rods, dielectrics, and other structures can create reconfigurable periodic line sources. These trough waveguide antennas (TWA) are then capable of providing both fixedfrequency and frequency-dependent beam steering. This was originally performed using...

Loizou, Loizos

2012-02-14T23:59:59.000Z

294

Theoretical and experimental study of 2.45 GHz rectifying antennas  

E-Print Network (OSTI)

This thesis presents a study on 2.45 GHz rectifying antennas (rectennas). The rectenna is a major component in a microwave power transmission system. The main feature is the conversion efficiency from microwave power to direct current (DC) power...

McSpadden, James Oliver

2012-06-07T23:59:59.000Z

295

Propagation models for multiple-antenna systems : methodology, measurements and statistics  

E-Print Network (OSTI)

The trend in wireless communications is towards utilization of multiple antenna systems. While techniques such as beam-forming and spatial diversity have been implemented for some time, the emergence of Multiple-Input ...

Herring, Keith, 1981-

2008-01-01T23:59:59.000Z

296

E-Print Network 3.0 - antenna aperture fields Sample Search Results  

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

Engineering 5 Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip Patch Antenna Summary: Analysis of an H-shape Cross Slotted Aperture-Coupled Microstrip...

297

E-Print Network 3.0 - active integrated antenna Sample Search...  

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

In this paper, an active integrated antenna using a T- shaped microstrip coupled patch... .interscience.wiley. com). DOI 10.1002mop.20658 Key words: T-shaped microstrip;...

298

Wireless audio and burst communication link with directly modulated THz photoconductive antenna  

Science Journals Connector (OSTI)

We demonstrate transmission of audio and burst signals through a prototype THz analog communication link employing laser-gated low-temperature-grown GaAs dipole antenna as THz...

Liu, Tze-An; Lin, Gong-Ru; Chang, Yung-Cheng; Pan, Ci-Ling

2005-01-01T23:59:59.000Z

299

Global Observation of Forest and Land Cover Dynamics (GOFC-GOLD) | Open  

Open Energy Info (EERE)

of Forest and Land Cover Dynamics (GOFC-GOLD) of Forest and Land Cover Dynamics (GOFC-GOLD) Jump to: navigation, search Name Global Observation of Forest and Land Cover Dynamics (GOFC-GOLD) Agency/Company /Organization World Meteorological Organization, United Nations Educational Scientific and Cultural Organization, United Nations Environment Programme, International Council for Science, Food and Agriculture Organization of the United Nations Sector Land, Climate Focus Area Biomass, Forestry, Agriculture Topics GHG inventory Resource Type Software/modeling tools Website http://www.fao.org/gtos/gofc-g References Global Observation of Forest and Land Cover Dynamics (GOFC-GOLD)[1] Global Observation of Forest and Land Cover Dynamics (GOFC-GOLD) Screenshot "Global Observation of Forest and Land Cover Dynamics (GOFC-GOLD) is a

300

Hybrid integrated active antennas, voltage-controlled oscillators and switchable & tunable CPW-slotline filters  

E-Print Network (OSTI)

HYBRID INTEGRATED ACTIVE ANTENNAS, VOLTAGE-CONTROLLED OSCILLATORS AND SWITCHABLE & TUNABLE CPW-SLOTLINE FILTERS A Thesis by JULIO ANGEL NAVARRO Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1990 Major Subject: Electrical Engineering HYBRID INTEGRATED ACTIVE ANTENNAS, VOLTAGE-CONTROLLED OSCILLATORS AND SWITCHABLE 2 TUNABLE CPW-SLOTLINE FILTERS A Thesis by JULIO ANGEL NAVARRO...

Navarro, Julio A

1990-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

The solubility of gold in water-hydrogen sulphide vapours: An experimental study  

E-Print Network (OSTI)

O-H2S gas mixtures. The solubility of gold was measured in pure H2S gas and H2O-H2S gas mixtures. The following reactions are interpreted to control the solubility of gold in H2O-H2S gas mixtures: )()()()()1 by the reaction H2+S=H2S, the solubility of gold in reduced sulphur-bearing vapour is relatively high (up to 1 ppb

Barnes, Sarah-Jane

302

E-Print Network 3.0 - artisanal gold shops Sample Search Results  

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

prices India... India's gold imports jump in Nov India Govt to enhance investment in coal ... Source: Rock, Chris - Department of Biological Sciences, Texas Tech University...

303

Do Investors Forecast Fat Firms? Evidence from the Gold Mining Industry  

E-Print Network (OSTI)

cantly increasing in p . g H. Royalty Payments Sometimesdelegate the mining) demand royalties for gold extraction.A linear royalty schedule (whether on units, revenues, or

Borenstein, Severin; Farrell, Joseph

2006-01-01T23:59:59.000Z

304

E-Print Network 3.0 - african gold miners Sample Search Results  

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

p. 432. 63 Ibid. 12;African Growth Recurring 17 Table 3: Gold Coast GDP, 1911 constant prices... African Growth Recurring: An Economic History Perspective on African Growth...

305

Gold nanoparticles as efficient antimicrobial agents for Escherichia coli and Salmonella typhi  

Science Journals Connector (OSTI)

Gold nanoparticles supported onto a range of zeolites, were found to have efficient antimicrobial properties when tested against Escherichia coli and Salmonella typhi colonies

Enrique Lima; Roberto Guerra; Vctor Lara; Ariel Guzmn

2013-01-19T23:59:59.000Z

306

E-Print Network 3.0 - awarded gold crystal Sample Search Results  

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

Name ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS DIRAC MEDAL 10 Summary: OF RADIOLOGY ACR GOLD MEDAL AWARD 10 AMERICAN COLLEGE OF RHEUMATOLOGY AMGEN PEDIATRIC...

307

E-Print Network 3.0 - atomic gold junction Sample Search Results  

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

16 Molecule-assisted atomic chain formation: mechanisms and properties of new one-dimensional conductors. Summary: of a suspended atomic wire of gold and oxygen atoms....

308

E-Print Network 3.0 - archeological gold authentication Sample...  

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

't do. Tests and quizzes aren't the gold standard either. - Fixed-choice test questions tend... by authentic use & authentic assessment. 12;Authentic performance...

309

E-Print Network 3.0 - assembled gold nanoparticles Sample Search...  

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

Assemblies Young Sun Nolan C. Harris Ching-Hwa Kiang Received: 6 February... 2007 Abstract We review recent work on DNA-linked gold nanoparticle assemblies. The...

310

A kinetic and adsorption study of CO oxidation over unsupported fine gold powder and over gold supported on titanium dioxide  

SciTech Connect

The catalytic oxidation of CO with O{sub 2} and adsorption of CO{sub 2} and O{sub 2} on Au deposited on TiO{sub 2} (AuTiO{sub 2}, mean diameter of gold particles 3.5 nm), TiO{sub 2}, and unsupported Au powder (mean diameter 76 nm) have been investigated by using a closed recirculation reaction system. The catalytic oxidation of CO with O{sub 2} on Au/TiO{sub 2} measured at 253--293 K proceeded very rapidly. In the same temperature range, fine gold powder was catalytically active, while TiO{sub 2} alone was entirely inactive for the oxidation. The rate constant of CO oxidation per unit of surface area of gold was larger by two orders of magnitude for Au/TiO{sub 2} than for Au powder. Adsorption of CO and CO{sub 2} occurred almost instantaneously and reversibly on preoxidized Au/TiO{sub 2}, whereas a slow increase in the O{sub 2} pressure was observed at 273 K in the absence of evacuation. A similar increase of O{sub 2} pressure was observed from oxidized TiO{sub 2}, but Au powder did not show any increase. The increase was ascribed to the desorption of weakly adsorbed O{sub 2} on the support surface of Au/TiO{sub 2}. The rate of reduction of preoxidized Au/TiO{sub 2} with CO almost corresponded to the increase in the O{sub 2} pressure and was far smaller than the rate of the catalytic oxidation of CO with O{sub 2} on the catalyst, indicating that molecular oxygen weakly adsorbed on the support surface of Au/TiO{sub 2} contributes only partly to the catalytic oxidation of CO. During the oxidation, O{sub 2} in the gas phase may be directly activated on the surface of deposited gold particles and/or on the very narrow perimeter interface between the gold and the support.

Iizuka, Yasuo; Tode, Toshihisa; Takao, Toshiaki; Yatsu, Kenichiro; Takeuchi, Toshiaki; Tsubota, Susumu; Haruta, Masatake

1999-10-01T23:59:59.000Z

311

Modelling spatial anisotropy of gold concentration data using GIS-based interpolated maps and variogram analysis: Implications for structural control of mineralization  

Science Journals Connector (OSTI)

Linear trends of anomalously high gold values in the Florida Canyon gold deposit, Nevada have been identified using a combination of contour maps of gold (Au) concentration developed with a geographic information...

Abani R Samal; Raja R Sengupta; Richard H Fifarek

2011-08-01T23:59:59.000Z

312

Tension and Systematics in the Gold06 SnIa Dataset  

E-Print Network (OSTI)

The Gold06 SnIa dataset recently released in astro-ph/0611572 consists of five distinct subsets defined by the group or instrument that discovered and analyzed the corresponding data. These subsets are: the SNLS subset (47 SnIa), the HST subset (30 SnIa), the HZSST subset (41 SnIa), the SCP subset (26 SnIa) and the Low Redshift (LR) subset (38 SnIa). These subsets sum up to the 182 SnIa of the Gold06 dataset. We use Monte-Carlo simulations to study the statistical consistency of each one of the above subsets with the full Gold06 dataset. In particular, we compare the best fit $w(z)$ parameters (w_0,w_1) obtained by subtracting each one of the above subsets from the Gold06 dataset (subset truncation), with the corresponding best fit parameters (w^r_0,w^r_1) obtained by subtracting the same number of randomly selected SnIa from the same redshift range of the Gold06 dataset (random truncation). We find that the probability for (w^r_0,w^r_1)=(w_0,w_1) is large for the Gold06 minus SCP (Gold06-SCP) truncation but is less than 5% for the Gold06-SNLS, Gold06-HZSST and Gold06-HST truncations. This result implies that the Gold06 dataset is not statistically homogeneous. By comparing the values of the best fit (w_0,w_1) for each subset truncation we find that the tension among subsets is such that the SNLS and HST subsets are statistically consistent with each other and `pull' towards LCDM (w_0=-1,w_1=0) while the HZSST subset is statistically distinct and strongly `pulls' towards a varying w(z) crossing the line $w=-1$ from below (w_00). We also isolate six SnIa that are mostly responsible for this behavior of the HZSST subset.

S. Nesseris; L. Perivolaropoulos

2007-01-09T23:59:59.000Z

313

Characterization and performance of a field aligned ion cyclotron range of frequency antenna in Alcator C-Mod  

SciTech Connect

Ion cyclotron range of frequency (ICRF) heating is expected to provide auxiliary heating for ITER and future fusion reactors where high Z metallic plasma facing components (PFCs) are being considered. Impurity contamination linked to ICRF antenna operation remains a major challenge particularly for devices with high Z metallic PFCs. Here, we report on an experimental investigation to test whether a field aligned (FA) antenna can reduce impurity contamination and impurity sources. We compare the modification of the scrape of layer (SOL) plasma potential of the FA antenna to a conventional, toroidally aligned (TA) antenna, in order to explore the underlying physics governing impurity contamination linked to ICRF heating. The FA antenna is a 4-strap ICRF antenna where the current straps and antenna enclosure sides are perpendicular to the total magnetic field while the Faraday screen rods are parallel to the total magnetic field. In principle, alignment with respect to the total magnetic field minimizes integrated E|| (electric field along a magnetic field line) via symmetry. A finite element method RF antenna model coupled to a cold plasma model verifies that the integrated E|| should be reduced for all antenna phases. Monopole phasing in particular is expected to have the lowest integrated E||. Consistent with expectations, we observed that the impurity contamination and impurity source at the FA antenna are reduced compared to the TA antenna. In both L and H-mode discharges, the radiated power is 20%30% lower for a FA-antenna heated discharge than a discharge heated with the TA-antennas. However, inconsistent with expectations, we observe RF induced plasma potentials (via gas-puff imaging and emissive probes to be nearly identical for FA and TA antennas when operated in dipole phasing). Moreover, the highest levels of RF-induced plasma potentials are observed using monopole phasing with the FA antenna. Thus, while impurity contamination and sources are indeed reduced with the FA antenna configuration, the mechanism determining the SOL plasma potential in the presence of ICRF and its impact on impurity contamination and sources remains to be understood.

Wukitch, S. J.; Garrett, M. L.; Ochoukov, R.; Terry, J. L.; Hubbard, A.; Labombard, B.; Lau, C.; Lin, Y.; Lipschultz, B.; Miller, D.; Reinke, M. L.; Whyte, D. [MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States)] [MIT Plasma Science and Fusion Center, Cambridge, Massachusetts 02139 (United States); Collaboration: Alcator C-Mod Team

2013-05-15T23:59:59.000Z

314

Heavy residue properties in intermediate energy nuclear collisions with gold  

SciTech Connect

We have measured the target fragment production cross sections and angular distributions for the interaction of 32, 44 and 93 MeV/nucleon argon, 35 and 43 MeV/nucleon krypton with gold. The fragment isobaric yield distributions, moving frame angular distributions and velocities have been deduced from these data. This fission cross section decreases with increasing projectile energy and the heavy residue cross section increases. The ratio v{sub {parallel}}/v{sub cn} increases approximately linearly with mass removed from the target. 21 refs., 8 figs.

Aleklett, K.; Sihver, L. (Uppsala Univ., Nykoeping (Sweden). Studsvik Neutron Research Lab.); Loveland, W. (Oregon State Univ., Corvallis, OR (USA)); Liljenzin, J.O. (Chalmers Univ. of Tech., Goeteborg (Sweden)); Seaborg, G.T. (Lawrence Berkeley Lab., CA (USA). Nuclear Science Div.)

1990-10-01T23:59:59.000Z

315

Single-Molecule Measurements of Gold-Quenched Quantum Dots  

Science Journals Connector (OSTI)

We report the study of the quenching of quantum dots (CdSe) by gold nanoparticles at the single-molecule level. Double-stranded DNA is used as a rigid spacer to tune the distance between the two nanoparticles. The width of the fluorescent intensity distribution, monitored at different interparticle distances, reflects both the nanoparticle heterogeneity and the fluorescence intermittency of the quantum dot. The fluorescence distribution emitted by single CdSe nanocrystals can easily be distinguished from the fluorescence of partially quenched CdSe. Our results show that the distance-dependence quenching is compatible with a Frster-type process.

Zoher Gueroui and Albert Libchaber

2004-10-15T23:59:59.000Z

316

Solving the Unsovlable: The Nanostructure of Gold at 1.1 Å Resolution  

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

Solving the Unsovlable: The Nanostructure of Gold at 1.1 Å Resolution Print Solving the Unsovlable: The Nanostructure of Gold at 1.1 Å Resolution Print For the first time, a team of scientists led by Roger Kornberg has synthesized thiol-covered gold nanoparticles and, using ALS Beamlines 5.0.2 and 8.2.2 and SSRL Beamlines 11-1 and 11-3, conclusively ascertained their atomic structure (at 1.1 Å resolution). The gold-thiol nanoparticle consists of 102 gold atoms surrounded by 44 molecules of a thiol compound (para-mercaptobenzoic acid, or p-MBA). The central gold atoms are grouped in a fivefold symmetric packing arrangement known as a Marks decahedron, which is surrounded by additional layers of gold atoms in unanticipated geometries. The protective p-MBAs interact not only with the gold but with one another, forming a rigid surface layer. This research is a success on several levels.The group developed a technique that solves a previously unsolvable nanostructure. They delivered a very detailed atomic map of this structure, which itself reveals an unusual discovery: the discrete nature of the nanoparticle, which can be explained by the closing of a 58-electron shell.

317

Synthesis, structure and spectroscopic investigations of luminescent heterobimetallic gold(I)-Rhodium(I) species  

E-Print Network (OSTI)

A novel, three-coordinate gold(I) dimer, Au2(tfepm)3Cl2 (la, lb), was synthesized and structurally characterized. Four gold(I)-rhodium(I) heterobimetallic complexes, AuIRh'(tBuNC)2(-dppm)2C12 (2), Au'Rh'(tBuNC)2(u-dmpm)2Cl2 ...

Dempsey, Jillian Lee

2005-01-01T23:59:59.000Z

318

Adhesion of Pseudomonas fluorescens(ATCC 17552) to Nonpolarized and Polarized Thin Films of Gold  

Science Journals Connector (OSTI)

...B7608FDQ Mar del Plata, Argentina 8 January 2001 16 April...B7608FDQ Mar del Plata, Argentina. Phone: 54 223 4816600...DLVO) interaction energy for the bacteria-gold...DLVO) interaction energy for the bacteria-gold...B7608FDQ Mar del Plata, Argentina. jbusalme@fi.mdp...

J. P. Busalmen; S. R. de Snchez

2001-07-01T23:59:59.000Z

319

On the application potential of gold nanoparticles in nanoelectronics and biomedicine  

Science Journals Connector (OSTI)

...chemistry, physics, biology and medicine. One contribution of 13...Havel2009Gold and nano-gold in medicine: overview, toxicology and...nl0100419 ) Schmid, G. , 2006 Nanotechnology. Assessment and perspectivesBerlin...Cui2009Recent advances in nanotechnology applied to biosensorsSensors...

2010-01-01T23:59:59.000Z

320

Gold discovery may have industry applications Lovley's lab has previously pub-  

E-Print Network (OSTI)

in a hydrothermal vent, where dissolved gold can some- times be found. The team wanted to see what would happen in solution in some thermal springs, and hydrothermal vents on the ocean floor," Lovley said. "The problem are waste streams from gold processing where this same reduction process might work on a larger scale

Lovley, Derek

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Alkanethiol-Induced Structural Rearrangements in Silica-Gold Core-Shell-type Nanoparticle Clusters: An  

E-Print Network (OSTI)

Alkanethiol-Induced Structural Rearrangements in Silica-Gold Core-Shell-type Nanoparticle Clusters 21, 2003. In Final Form: April 19, 2004 Electrostatically bonded SiO2,Au nanoparticle clusters form by reaction of 3-aminopropylsilane-modified SiO2 spheres (470 nm) with citrate-coated gold nanoparticles (9

Guo, Ting

322

SERS-Coded Gold Nanorods as a Multifunctional Platform for Densely Multiplexed Near-Infrared  

E-Print Network (OSTI)

SERS-Coded Gold Nanorods as a Multifunctional Platform for Densely Multiplexed Near-Infrared. In this work, we show that the near-infrared plasmon resonance of gold nanorods (NRs) may be exploited in the near-infrared, a spectral multiplexing density over an order of magnitude greater than attainable

Bhatia, Sangeeta

323

NANO EXPRESS Open Access Resonant frequency of gold/polycarbonate hybrid  

E-Print Network (OSTI)

NANO EXPRESS Open Access Resonant frequency of gold/polycarbonate hybrid nano resonators fabricated on plastics via nano-transfer printing Edward Dechaumphai1 , Zhao Zhang1 , Nathan P Siwak2,3 , Reza Ghodssi2,3 , Teng Li1,4* Abstract We report the fabrication of gold/polycarbonate (Au/PC) hybrid nano resonators

Li, Teng

324

Solving the Unsovlable: The Nanostructure of Gold at 1.1 Å Resolution  

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

Solving the Unsovlable: The Solving the Unsovlable: The Nanostructure of Gold at 1.1 Å Resolution Solving the Unsovlable: The Nanostructure of Gold at 1.1 Å Resolution Print Wednesday, 28 May 2008 00:00 For the first time, a team of scientists led by Roger Kornberg has synthesized thiol-covered gold nanoparticles and, using ALS Beamlines 5.0.2 and 8.2.2 and SSRL Beamlines 11-1 and 11-3, conclusively ascertained their atomic structure (at 1.1 Å resolution). The gold-thiol nanoparticle consists of 102 gold atoms surrounded by 44 molecules of a thiol compound (para-mercaptobenzoic acid, or p-MBA). The central gold atoms are grouped in a fivefold symmetric packing arrangement known as a Marks decahedron, which is surrounded by additional layers of gold atoms in unanticipated geometries. The protective p-MBAs interact not only with the gold but with one another, forming a rigid surface layer. This research is a success on several levels.The group developed a technique that solves a previously unsolvable nanostructure. They delivered a very detailed atomic map of this structure, which itself reveals an unusual discovery: the discrete nature of the nanoparticle, which can be explained by the closing of a 58-electron shell.

325

(Data in metric tons1 of gold content, unless otherwise noted)  

E-Print Network (OSTI)

1997 1998 1999e Production: Mine 317 326 362 366 340 Refinery: Primary (2 ) (2 ) 270 277 260 Secondary, and the size of gold mining operations increased. Most of the larger companies were successfully replacing the future role of gold in the reserves of the European Central Bank, which began operation on January 1

326

Femtosecond-tunable measurement of electron thermalization in gold  

Science Journals Connector (OSTI)

Femtosecond electron thermalization in metals was investigated using transient thermomodulation transmissivity and reflectivity. Studies were performed using a tunable multiple-wavelength femtosecond pump-probe technique in optically thin gold films in the low perturbation limit. An IR pump beam is used to heat the electron distribution and changes in electron temperature are measured with a visible probe beam at the d band to Fermi-surface transition. We show that the subpicosecond optical response of gold is dominated by delayed thermalization of the electron gas. This effect is particularly important far off the spectral peak of the reflectivity or transmissivity changes, permitting a direct and sensitive access to the internal thermalization of the electron gas. Using a simple rate-equation model, line-shape analysis of the transient reflectivity and transmissivity indicates a thermalization time of the order of 500 fs. At energies close to the Fermi surface, longer thermalization times ?12 ps are observed. These results are in agreement with a more sophisticated model based on calculations of the electron-thermalization dynamics by numerical solutions of the Boltzmann equation. This model quantitatively describes the measured transient optical response during the full thermalization time of electron gas, of the order of 1.5 ps, and gives new insight into electron thermalization in metals.

C.-K. Sun; F. Valle; L. H. Acioli; E. P. Ippen; J. G. Fujimoto

1994-11-15T23:59:59.000Z

327

Active Geothermal Systems And Associated Gold Deposits In The Great Basin |  

Open Energy Info (EERE)

Geothermal Systems And Associated Gold Deposits In The Great Basin Geothermal Systems And Associated Gold Deposits In The Great Basin Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Active Geothermal Systems And Associated Gold Deposits In The Great Basin Details Activities (0) Areas (0) Regions (0) Abstract: In western North America, a number of geothermal systems derive their heat from magmas or cooling intrusions. The interior of the Great Basin however, is characterized by widespread amagmatic geothermal activity that owes its existence to high crustal heat flow and active extensional tectonics. Both the magmatically heated and extensional fluid types in the Great Basin have recently, or are currently, depositing gold. Quaternary to Pliocene-aged gold deposits with adjacent high-temperature (≤ 150°C)

328

Operating the Upgraded NSTX HHFW Antenna Array in an Environment with Li-coated Surfaces  

SciTech Connect

The single-feed, end-grounded straps of the NSTX 12-strap HHFW antenna array have been replaced with double-feed, center-grounded straps to reduce the voltages in the vicinity of the Faraday shield (FS) for a given strap current. The strap spacings to the FS and to the back plate were increased by 3 mm to decrease the electric fields for a given voltage. The electric fields near the FS have been roughly halved for the same strap currents, permitting a direct examination of the roles that internal fields play in determining antenna power limits in plasmas. Extensive RF/plasma conditioning of the antenna was required to remove enough of the evaporated Li deposits from prior wall conditioning to permit coupling in excess of 4 MW to L- and H-mode plasmas in 2009. Most arcs were associated with expulsion of Li from the FS/antenna frame surfaces. The center-grounded straps were less susceptible to arcing during ELMing Hmode plasmas. Reliable operation above 2 MW was difficult after the installation of the Liquid Lithium Divertor (LLD) in 2010. Li-compound dust was found in the antennas after this run and is believed to have contributed to the reduced power limit.

Ryan, Philip Michael [ORNL] [ORNL; Ellis, R. [Princeton Plasma Physics Laboratory (PPPL)] [Princeton Plasma Physics Laboratory (PPPL); Hosea, J. [Princeton Plasma Physics Laboratory (PPPL)] [Princeton Plasma Physics Laboratory (PPPL); Kung, C. C. [Princeton Plasma Physics Laboratory (PPPL)] [Princeton Plasma Physics Laboratory (PPPL); LeBlanc, B [Princeton Plasma Physics Laboratory (PPPL)] [Princeton Plasma Physics Laboratory (PPPL); Pinsker, R. [General Atomics] [General Atomics; Taylor, G. [Princeton Plasma Physics Laboratory (PPPL)] [Princeton Plasma Physics Laboratory (PPPL); Wilson, J. R. [Princeton Plasma Physics Laboratory (PPPL)] [Princeton Plasma Physics Laboratory (PPPL); NSTX Team, [Multiple Institutions

2011-01-01T23:59:59.000Z

329

Color coherence in a heavy quark antenna radiating gluons inside a QCD medium  

E-Print Network (OSTI)

We compute the color coherence effects for soft gluon radiation off antennas containing heavy quarks in the presence of a QCD medium - in color singlet, triplet or octet global states. This work completes the studies of antenna radiation inside a medium which provide a useful picture of the relevance of interference effects in jet parton showers for the jet quenching phenomenon observed in high-energy nuclear collisions. The analysis is performed resumming the multiple scatterings of the partonic system with the medium. The main conclusion is that decorrelation due to color rotation is more effective in the case in which at least one of the emitters of the antenna is a heavy quark. This effect, present both for a heavy-quark-antiquark or a heavy-quark-gluon antenna is more relevant for the later or for the case in which the energies of the quark and antiquark are very different. The parameter controlling these effects involves the dead-cone angle. We find that interferences are cancelled, spoiling the color correlation of the pair, when $\\theta_{ DC}=M/E >>1/\\sqrt{\\omega L}$ where E and {\\omega} are the energies of the heavy quark and the radiated gluon and L is the medium length. In the case of a heavy-quark-antiquark antenna $t_{form}$ appears instead of L if the original splitting is symmetric. The presence or absence of interferences modifies the energy loss pattern.

Manoel R. Calvo; Manoel R. Moldes; Carlos A. Salgado

2014-03-19T23:59:59.000Z

330

Design, Modeling and Numerical Analysis of Microwave and Optical Devices: The Multi-band Patch Antenna, Ultra Wideband Ring Filter and Plasmonic Waveguide Coupler  

E-Print Network (OSTI)

The Transmission Line Model .................................................................................. 13 Reconfigurable Antennas ......................................................................................... 20 Multiband Frequency.... ................... 22 Figure 2-13. Transmission line model of the reconfigurable antenna shown in Figure 2-12. ............................................................................................................. 23 Figure 2-14. VSWR for the frequency...

Liu, Ya-Chi

2014-01-14T23:59:59.000Z

331

Application of the antenna theory model to a tall tower struck by Behzad Kordi,1,2  

E-Print Network (OSTI)

on the lightning flash parameters. However, the presence of a vertically extended and grounded strike objectApplication of the antenna theory model to a tall tower struck by lightning Behzad Kordi,1] The interaction of lightning with the 553-m high CN Tower in Toronto is modeled using the antenna theory model

Florida, University of

332

A Mechanically Stable, Low Profile, Omni-Directional Solar-Cell Integrated Antenna for Outdoor Wireless Sensor Nodes  

E-Print Network (OSTI)

A Mechanically Stable, Low Profile, Omni-Directional Solar-Cell Integrated Antenna for Outdoor nodes have been integrated with solar cells to increase the robustness of the network [2]. To boost under the solar cell circuitry. Several solar antenna integration methods have been published

Tentzeris, Manos

333

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

E-Print Network (OSTI)

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

Stanford University

334

An Atom-Wide Antennae Created from Difference-Making Defects | Department  

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

An Atom-Wide Antennae Created from Difference-Making Defects An Atom-Wide Antennae Created from Difference-Making Defects An Atom-Wide Antennae Created from Difference-Making Defects March 7, 2012 - 3:35pm Addthis Take advantage of microwave microscopy, researchers were able to locate graphene islands on graphene. “Point defects” locally enhanced the graphene’s ability to transform waves of light into electronic signals. | Photo courtesy of Oak Ridge National Laboratory. Take advantage of microwave microscopy, researchers were able to locate graphene islands on graphene. "Point defects" locally enhanced the graphene's ability to transform waves of light into electronic signals. | Photo courtesy of Oak Ridge National Laboratory. Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science

335

The EoR Sensitivity of the 128 Antenna Murchison Widefield Array  

E-Print Network (OSTI)

Using the planned antenna locations of the 128 antenna buildout of the Murchison Widefield Array (MWA), we accurately calculate its sensitivity to the Epoch of Reionization (EoR) power spectrum of redshifted 21 cm emission. Our calculation takes into account synthesis rotation, chromatic and asymmetrical baseline effects, and excludes modes that will be contaminated by foreground subtraction. With one full season of observation on two fields (900 and 700 hours), the MWA will be capable of a 14$\\sigma$ detection of the EoR signal along with slope constraints.

Beardsley, A P; Morales, M F; Arcus, W; Barnes, D; Bernardi, G; Bowman, J D; Briggs, F H; Bunton, J D; Cappallo, R J; Corey, B E; Deshpande, A; deSouza, L; Emrich, D; Gaensler, B M; Goeke, R; Greenhill, L J; Herne, D; Hewitt, J N; Johnston-Hollit, M; Kaplan, D L; Kasper, J C; Kincaid, B B; Koenig, R; Kratzenberg, E; Lonsdale, C J; Lynch, M J; McWhirter, S R; Mitchell, D A; Morgan, E; Oberoi, D; Ord, S M; Pathikulangara, J; Prabu, T; Remillard, R A; Rogers, A E E; Roshi, A; Salah, J E; Sault, R J; Shankar, N Udaya; Srivani, K S; Stevens, J; Subrahmanyan, R; Tingay, S J; Wayth, R B; Waterson, M; Webster, R L; Whitney, A R; Williams, A; Williams, C L; Wyithe, J S B

2012-01-01T23:59:59.000Z

336

Prediction of the thermodynamic properties of gold, arsenic, and  

Office of Scientific and Technical Information (OSTI)

The Hydrothermal Chemistry of Gold, Arsenic, Antimony, Mercury and Silver Brad Bessinger Exponent, Inc. 5335 Meadows Road, Suite 365 Lake Oswego, OR 97035 John A. Apps Earth Sciences Division Lawrence Berkeley National Laboratory University of California, Berkeley, California 94720 March 2005 This work was supported by the Director, Office of Science Office of Basic Energy Sciences of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098. Abstract A comprehensive thermodynamic database based on the Helgeson-Kirkham-Flowers (HKF) equation of state was developed for metal complexes in hydrothermal systems. Because this equation of state has been shown to accurately predict standard partial molal thermodynamic properties of

337

Asymmetric Reduction of Gold Nanoparticles into Thermoplasmonic Polydimethylsiloxane Thin Films  

Science Journals Connector (OSTI)

This work extends this range to include fabrication and characterization of AuNP-containing asymmetric thin films and shows important advantages relative to uniformly distributed particles via sub-surface introduction of AuNPs at just one interface of a polymer. ... Using a diffusivity of water in PDMS of approximately 2 109 m2/s,(32) diffusive penetration of water into a semi-infinite PDMS slab would reach approximately 5 cm after 24 h. ... This increase in thermal response relative to previous aqueous, silica, and PDMS samples appears to result from an increase in nanoparticle density relative to insulating PDMS, insulation of the heated layer by a thicker, adjacent gold-free PDMS, and reduction of radiativity of the PDMS relative to planar substrates. ...

Jeremy R. Dunklin; Gregory T. Forcherio; Keith R. Berry, Jr.; D. Keith Roper

2013-08-09T23:59:59.000Z

338

Gold River, California: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

California: Energy Resources California: Energy Resources (Redirected from Gold River, CA) Jump to: navigation, search Equivalent URI DBpedia Coordinates 38.6262937°, -121.2466156° 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":38.6262937,"lon":-121.2466156,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

339

Modeling pore corrosion in normally open gold- plated copper connectors.  

SciTech Connect

The goal of this study is to model the electrical response of gold plated copper electrical contacts exposed to a mixed flowing gas stream consisting of air containing 10 ppb H{sub 2}S at 30 C and a relative humidity of 70%. This environment accelerates the attack normally observed in a light industrial environment (essentially a simplified version of the Battelle Class 2 environment). Corrosion rates were quantified by measuring the corrosion site density, size distribution, and the macroscopic electrical resistance of the aged surface as a function of exposure time. A pore corrosion numerical model was used to predict both the growth of copper sulfide corrosion product which blooms through defects in the gold layer and the resulting electrical contact resistance of the aged surface. Assumptions about the distribution of defects in the noble metal plating and the mechanism for how corrosion blooms affect electrical contact resistance were needed to complete the numerical model. Comparisons are made to the experimentally observed number density of corrosion sites, the size distribution of corrosion product blooms, and the cumulative probability distribution of the electrical contact resistance. Experimentally, the bloom site density increases as a function of time, whereas the bloom size distribution remains relatively independent of time. These two effects are included in the numerical model by adding a corrosion initiation probability proportional to the surface area along with a probability for bloom-growth extinction proportional to the corrosion product bloom volume. The cumulative probability distribution of electrical resistance becomes skewed as exposure time increases. While the electrical contact resistance increases as a function of time for a fraction of the bloom population, the median value remains relatively unchanged. In order to model this behavior, the resistance calculated for large blooms has been weighted more heavily.

Battaile, Corbett Chandler; Moffat, Harry K.; Sun, Amy Cha-Tien; Enos, David George; Serna, Lysle M.; Sorensen, Neil Robert

2008-09-01T23:59:59.000Z

340

High-resolution chemical imaging of gold nanoparticles using hard x-ray ptychography  

SciTech Connect

We combine resonant scattering with (ptychographic) scanning coherent diffraction microscopy to determine the chemical state of gold nanoparticles with high spatial resolution. Ptychographic images of the sample are recorded for a series of energies around the gold L{sub 3} absorption edge. From these data, chemical information in the form of absorption and resonant scattering spectra is reconstructed at each location in the sample. For gold nanoparticles of about 100 nm diameter, a spatial resolution of about 20-30 nm is obtained. In the future, this microscopy approach will open the way to operando studies of heterogeneous catalysts on the nanometer scale.

Hoppe, R.; Patommel, J.; Schroer, C. G. [Institute of Structural Physics, Technische Universitaet Dresden, D-01062 Dresden (Germany)] [Institute of Structural Physics, Technische Universitaet Dresden, D-01062 Dresden (Germany); Reinhardt, J. [Institute of Structural Physics, Technische Universitaet Dresden, D-01062 Dresden (Germany) [Institute of Structural Physics, Technische Universitaet Dresden, D-01062 Dresden (Germany); Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg (Germany)] [Germany; Hofmann, G.; Grunwaldt, J.-D. [Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, D-76131 Karlsruhe (Germany)] [Institute for Chemical Technology and Polymer Chemistry, Karlsruhe Institute of Technology, D-76131 Karlsruhe (Germany); Damsgaard, C. D. [Center for Electron Nanoscopy and Department of Physics, Technical University of Denmark, DK-2800 Lyngby (Denmark)] [Center for Electron Nanoscopy and Department of Physics, Technical University of Denmark, DK-2800 Lyngby (Denmark); Wellenreuther, G.; Falkenberg, G. [Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg (Germany)] [Deutsches Elektronen-Synchrotron DESY, D-22607 Hamburg (Germany)

2013-05-20T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Radioactive gold in the treatment of bovine ocular squamous carcinoma and its precursor lesions  

E-Print Network (OSTI)

CANTHUS AND ULCERATIVE CARCINOMA OF LOWER LID MID-SECTION (CASE 10) 31 33 INTRODUCTION The use of radioactive gold ( Au) in the treatment of certain 198 tumors in humans was begun in the early 1950's as a substitute for radon therapy. The success... of its use led to the displacement of radon by radioactive gold seeds and linear sources in many cases. Shortly thereafter, techniques in the use of radioactive gold were reported at the University of Texas M. D. Anderson Hospital and Tumor Institute...

England, Roy Belvin

2012-06-07T23:59:59.000Z

342

Analysis of large reflector antennas using CSP fringe formulation and higher-order diffraction  

E-Print Network (OSTI)

Analysis of large reflector antennas using CSP fringe formulation and higher-order diffraction- tric conductor (PEC) objects when illuminated by a Complex Source Points (CSP) beam expansion (S of a CSP-expansion illumination. In this work we discuss an application of the CSP fringe formulation

Nehorai, Arye

343

Design and Comparison Between Two General Purpose Dipole Type UHF RFID Tag Antennas  

E-Print Network (OSTI)

, Department of Electrical Engineering, University, MS 38677, USA, Email: fyang@olemiss.edu, atef are show in Figures 1 and 2. The tag in Fig. 1 is a modification of a bowtie antenna and the second one on a plastic substrate, which was modelled as 0.15 mm polyethylene sheet. Tags utilize the Alien Gen2 UHF RFID

Elsherbeni, Atef Z.

344

Figure 1: ATA 42 antenna array at Hat Creek ********ADAPTIVE REAL TIME IMAGING FOR RADIO ASTRONOMY*******  

E-Print Network (OSTI)

Figure 1: ATA 42 antenna array at Hat Creek ********ADAPTIVE REAL TIME IMAGING FOR RADIO ASTRONOMY --------------------------­ · Astronomers primarily interested in astronomy. ­ Data reduction preoccupies radio astronomy specialists,f,p Bandpass( )f PolCal( )f,p Gains( )s,f,p S Beam Imager Astronomy Solver I2 ( ) )^(^, 2sVpfV - å ¹kj X Solver

Militzer, Burkhard

345

A Study of Near-Field Direct Antenna Modulation Systems Using Convex Optimization  

E-Print Network (OSTI)

, Aydin Babakhani, Ali Hajimiri and John C. Doyle Abstract-- This paper studies the constellation diagram of the signal constellation diagram satisfactorily. A similar analysis is provided for the identification of the coverage area of the antenna input impedance, which is beneficial for designing an energy-efficient NFDAM

Hajimiri, Ali

346

EVLA Memo No. 89 The EVLA Outdoor Antenna Test Range Project  

E-Print Network (OSTI)

extremes. One particular task is to implement a Quality Assurance Program (QA) to monitor the manufacturing. The radiation pattern and VSWR data taken would be the core mechanism of the QA program. The second plan program for testing the numerous antenna feeds that will be fabricated over the duration of the project

Groppi, Christopher

347

Generalized Coordinated Port Selection in a Multi-Cell Distributed Antenna System using  

E-Print Network (OSTI)

Generalized Coordinated Port Selection in a Multi-Cell Distributed Antenna System using], coordinated port selection was shown to achieve significant performance gains. However, in the system considered therein, the ports in each cell were constrained to transmit only to user terminals (UTs

Yanikomeroglu, Halim

348

Position angle of the VSOP antenna feed. National Radio Astronomy Observatory, Socorro, New Mexico, USA  

E-Print Network (OSTI)

, including antenna and solar panels, is shown in Fig. 1. We define a right hand coordinate system fixed about which the solar panels can be rotated. The solar panels are pointed at the Sun by rotation the source and the Sun, there are two possible orientations of the satellite and the solar panels

Groppi, Christopher

349

Non-parametric Multiple-Antenna Blind Spectrum Sensing by Predicted Eigenvalue Threshold  

E-Print Network (OSTI)

in poor spectrum utilization. The dramatic increase in the demand for radio spectrum and the actual low (secondary user) must be aware of its radio environment and capable of detecting the licensed users, alsoNon-parametric Multiple-Antenna Blind Spectrum Sensing by Predicted Eigenvalue Threshold K. Hassan

Paris-Sud XI, Université de

350

Model for energy efficiency in radio over fiber distributed indoor antenna Wi-Fi network  

E-Print Network (OSTI)

Model for energy efficiency in radio over fiber distributed indoor antenna Wi-Fi network Yves Josse communications in indoor environments. In this paper, the power consumption and energy efficiency of a DAS using for different transmission configurations, yielding a distance- dependent energy efficiency model. In a second

Paris-Sud XI, Université de

351

Special Sensor Microwave Imager and Sounder (SSMIS) Antenna Brightness Temperature Data Record (TDR)  

E-Print Network (OSTI)

Special Sensor Microwave Imager and Sounder (SSMIS) Antenna Brightness Temperature Data Record (TDR/NESDIS/Center for Satellite Applications and Research Contributors from: Banghua Yan (Lead), QSS/JCSDA Ninghai Sun, IMSG, Metoffice, UK Yong Han, STAR/JCSDA Mark Liu, QSS/JCSDA Distribution to: Ralph Ferrrao, STAR Tom Schott, OSD

352

A compact broadband multilayer patch antenna and its applications for phased arrays  

E-Print Network (OSTI)

coupled II-shaped feed with a U-slotted patch antenna. The simulated H-plane cross polarization was too low to show on Figure 25 to Figure 27. cccup15dlv. sp cccup20dhv sp ? ? cccup25div. sp 150 100 50 4 -10 hn -12 14 18 20 8. 5 9 9. 5 10 10 5...

Kidder, Charles Crandall

2012-06-07T23:59:59.000Z

353

Receiver Antenna Array for a Multichannel Sense-and-Avoid Radar for Small UAVs  

E-Print Network (OSTI)

Receiver Antenna Array for a Multichannel Sense-and-Avoid Radar for Small UAVs Jose Francisco for use in a sense-and-avoid radar for use in the Cessna C-172 and small Unmanned Aerial Vehicles (UAVs. . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . ..10 1.1.1 Multichannel Sense-and-Avoid Radar for UAVs. . . . . . . . . . . . . . . . . . . . . . ...10

Kansas, University of

354

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

E-Print Network (OSTI)

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

Aksun, M. Irsadi

355

Intelligent Antenna Selection Decision in IEEE 802.15.4 Wireless Sensor Networks: An Experimental Analysis  

E-Print Network (OSTI)

.15.4 Wireless Sensor Networks (WSNs). This study provides us the basis to design and implement software defined environmental monitoring like wildlife tracking, habitat monitoring, forest fire detection, mine safety monitor to path loss, multipath fading, radiation characteristics, antenna orientation, and Doppler effects

Boyer, Edmond

356

Impact Behavior and Radiation Performance of a Structurally Integrated Antenna Array Conformed Around Cylindrical Bodies  

E-Print Network (OSTI)

the loads in addition to radiating or receiving electromagnetic energy [1-3]. In the present paper, one a microstrip antenna is embedded, as shown in Fig. 1(a). Sandwich construction involves two relatively dense. The presence of the core moves the facesheets away from the neutral axis, enhancing the bending resistance

Tentzeris, Manos

357

Logo-Antenna Based RFID Tags for Advertising Application Khaled ElMahgoub 1  

E-Print Network (OSTI)

Logo-Antenna Based RFID Tags for Advertising Application Khaled ElMahgoub 1 , Tamer Elsherbeni 1 the basis of using radio frequency identification (RFID) tags for advertisement. Two RFID tags that apply. This work demonstrates the applicapability and design flexibility of RFID tags for many advertising

Elsherbeni, Atef Z.

358

Online Lifetime-Centric Multicast Routing: for AdU Hoc Networks with Directional Antennas  

E-Print Network (OSTI)

energy required to maintain a tree (broadcastlmulticast) [Z], [4], [5],[6], 1141, [24], E251.Thomas: Hou*. Yi Shi*, Hanif U. Sheralit, Jeffrey E. Wieselthied *The Bradley Department of Electrical-beam directional antenna and k provisioned with limited energy. We are interested in an online muIticast routing

Hou, Y. Thomas

359

A NEW TWO-FLARE-SHAPED UWB ANTENNA ELEMENT Anatoliy O. Boryssenko1)  

E-Print Network (OSTI)

-related requirements, electrical, mechanical, manufacturing and cost constraints. Some authors considered historically are properly shaped and driven through direct connection to coaxial cables without balun. The antenna-3]. Unlike traditional narrowband systems, their UWB counterparts operate by employing very short electrical

Southern California, University of

360

Novel technologies and techniques for low-cost phased arrays and scanning antennas  

E-Print Network (OSTI)

reconfigurable grating antenna is presented for low-cost millimeter-wave beam steering. The versatility of the approach is proven by adapting the design to dual-beam and circular-polarized operation. In addition, a simple and accurate procedure is developed...

Rodenbeck, Christopher Timothy

2004-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

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

E-Print Network (OSTI)

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

De Flaviis, Franco

362

Low cost and compact active integrated antenna transceiver for system applications  

E-Print Network (OSTI)

is presented that has a Schottky mixer diode and an FET integrated within an inverted patch antenna. The FET serves as the source for the transmitter and as the local oscillator. A 5.5 dB isotropic conversion loss at 6 GHz with a 200 MHz intermediate frequency...

Flynt, Robert Alvin

2012-06-07T23:59:59.000Z

363

Near-Infrared Photodetector Enhanced by an Open-Sleeve Dipole Antenna  

E-Print Network (OSTI)

Near-Infrared Photodetector Enhanced by an Open- Sleeve Dipole Antenna Liang Tang, S. Ekin Kocabas-aperture-enhanced photodetector has been demonstrated at near infrared wavelengths based on this principle [6]. However, for easyITuD3.pdf #12;responsivity at near-infrared wavelengths and its compatibility with Si technology

Miller, David A. B.

364

Energy Efficient Radio Resource Management in a Coordinated Multi-Cell Distributed Antenna System  

E-Print Network (OSTI)

and two energy efficient radio resource management schemes are investigated; either ports can be switched - Distributed antenna systems, CoMP, HetNets, port selection, radio resource management, energy efficiency ports in LTE-A terminology). The rising energy costs and environmental concerns have led researchers

Yanikomeroglu, Halim

365

Dispersive Properties of Terminal-Loaded Dipole Antennas in UWB Link Anatoliy O. Boryssenko(1)  

E-Print Network (OSTI)

schaubert@ecs.umass.edu) Introduction In this study, the effect of resistive antenna port terminations ports. #12;Numerical Results for Link Figures of Merit A Method of Moment solver is used to compute of the energy delivered at the receiver load to the energy available from the generator, (iii) time confinement

Southern California, University of

366

ECG vs. Single-Antenna System for Heartbeat Activity Dany Obeid1  

E-Print Network (OSTI)

ECG vs. Single-Antenna System for Heartbeat Activity Detection Dany Obeid1 , Gheorghe Zaharia2 from the signals obtained with the Doppler system and compared to simultaneous ECG signals. Keywords, is validated with an electrocardiogram (ECG) signal. In addition to the installation simplicity, the proposed

Paris-Sud XI, Université de

367

Exploration of catalysis activation emergency as a function of gold nanoparticle surface morphology  

E-Print Network (OSTI)

The application of rippled gold nanoparticles with bi-ligand surface morphology as a catalyst was tested. The hydrolysis of 2,4-dinitrophenyl acetate (DNPA) served as the catalytic reaction being analyzed and the bi-ligand ...

Stefanescu, Cristina F

2008-01-01T23:59:59.000Z

368

Effects of varying ethanol and water concentrations as a gold nanoparticle gel solvent  

E-Print Network (OSTI)

Striped gold nanoparticles are unique in several of their characteristics and applications. Recent experiments have determined a new medium with which contain the nanoparticles is that of a chemical gel. The nanoparticles ...

Schaefer, Thomas Gerard

2009-01-01T23:59:59.000Z

369

Green Synthesis of Sub-10 nm Gold Nanoparticles by two-step Laser Irradiation  

Science Journals Connector (OSTI)

Size control of laser synthesized gold nanoparticles in different solvents is reported. Our two-step green-synthesis approach employs only the fundamental harmonic of a Nd:YAG laser at...

deOliveira, Vinicius S; Henrique, Franciele R; Graff, Ismael L; Schreiner, Wido H; Bezerra, Arandi G

370

Gold Nanoparticle Enlargement Coupled with Fluorescence Quenching for Highly Sensitive Detection of Analytes  

Science Journals Connector (OSTI)

We report a versatile and facile route for highly sensitive detection of analytes through coupling the enlargement of gold nanoparticles with fluorescence quenching. The fluorescence intensity of dye molecules (e.g., fluorescein or rhodamine B) ...

Seong Yoon Lim; Jae Hong Kim; Joon Seok Lee; Chan Beum Park

2009-10-29T23:59:59.000Z

371

E-Print Network 3.0 - atomically flat gold Sample Search Results  

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

of micron-sized wires, fabricated lithographically on a flat... 12;456 Fabrication of micro-magnetic traps for cold neutral atoms 1 m of gold is reasonable... -magnetic traps...

372

Catalytically active gold: The role of cluster morphology T.V. Choudhary a  

E-Print Network (OSTI)

synthesis, water gas shift reaction [10,11], environmental catalysis [2,12,13] and hydrogenation reactions is sufficient to explain the reaction kinetics. # 2005 Published by Elsevier B.V. Keywords: CO oxidation; Gold

Goodman, Wayne

373

In Situ XAS Studies on the Structure of the Active Site of Supported Gold Catalysts  

SciTech Connect

Gold clusters supported on Al2O3 and TiO2 have been exposed to different mixtures of CO and O2. Their structure has been probed in situ using X-ray absorption spectroscopy (XAS) at the Au L3-edge. In all materials, the dominant phase during catalysis is Au0. Both samples show variations of the electronic structure of the gold clusters with changing reaction conditions as evidenced by changes in the X-ray absorption near-edge (XANES) region. These variations are caused by interaction between the gold clusters and the carbon monoxide present in the gas phase. The gold atoms remain zerovalent throughout all experiments confirming the importance of Au0 for catalytic activity.

Weiher, Norbert; Beesley, Angela M.; Tsapatsaris, Nikolaos [Molecular Materials Centre, School of Chemical Engineering and Analytical Science, Sackville Street, PO Box 88, Manchester, M60 1QD (United Kingdom); Louis, Catherine; Delannoy, Laurent [Laboratoire de Reactivite de Surface, UMR 7609 CNRS, Universite Pierre et Marie Curie, 4 place Jussieu, 75252, Paris, Cedex 05 (France); Bokhoven, Jeroen A. van [Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich (Switzerland); Schroeder, Sven L. M. [Molecular Materials Centre, School of Chemical Engineering and Analytical Science, Sackville Street, PO Box 88, Manchester, M60 1QD (United Kingdom); Molecular Materials Centre, School of Chemistry, Sackville Street, PO Box 88, Manchester, M60 1QD (United Kingdom)

2007-02-02T23:59:59.000Z

374

E-Print Network 3.0 - atomic gold wires Sample Search Results  

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

following pages. Draw your own conclusions. 1 12; Figure 1: 0.0008 00 gold-plated tungsten wire from... Thermionic Products. Figure 2: 0.0008 00 ... Source: McDonald, Kirk -...

375

Electron-Muon Correlations in Proton+Proton and Deuteron+Gold Collisions at PHENIX.  

E-Print Network (OSTI)

??This dissertation presents the first measurement of electron-muon azimuthal correlations at the PHENIX experiment at RHIC in 200 GeV proton-proton and deuteron-gold collisions. Electron-muon pairs (more)

Engelmore, Tatia

2011-01-01T23:59:59.000Z

376

Gold mining and the golden rule: a challenge for producers and consumers in developing countries  

E-Print Network (OSTI)

countries Saleem H. Ali University of Vermont, Rubenstein School of Environment and Natural Resources, 151 S. This is especially true since gold is eminently recyclable and is primarily used for ornamentation. However, the key

Vermont, University of

377

What Controls the Melting Properties of DNA-Linked Gold Nanoparticle Assemblies?  

E-Print Network (OSTI)

What Controls the Melting Properties of DNA-Linked Gold Nanoparticle Assemblies? Rongchao Jin the relative importance of nanoparticle, oligonucleotide, and environmental variables that contribute to the observed sharp melting transitions associated with DNA-linked nanoparticle structures. These variables

378

Molecular Dynamics Study of Alkanethiolate Self-Assembled Monolayer coated Gold Nanoparticle  

Science Journals Connector (OSTI)

Through molecular simulations we have observed that the surface of gold nanoparticles become highly corrugated by the adsorption of alkanethiolate self- assembled monolayers (SAMs). Furthermore, as the temperature is increased, the SAMs dissolve into ...

B. Henz; M. Zachairah

2007-06-01T23:59:59.000Z

379

EnzymeGold Nanoparticle Bioconjugates: Quantification of Particle Stoichiometry and Enzyme Specific Activity  

Science Journals Connector (OSTI)

Enzymegold nanoparticle bioconjugates have a wide variety of uses ... characterized. This protocol outlines preparation of enzymenanoparticle bioconjugates and two complementary methods for quantifying enzyme:nanoparticle

Jacqueline D. Keighron; Christine D. Keating

2013-01-01T23:59:59.000Z

380

in vivo Photothermal Optical Coherence Tomography of Targeted Mouse Brain Tumors using Gold Nanostars  

Science Journals Connector (OSTI)

We present structural and molecular-contrast imaging of mouse brain tumors using photo-thermal optical coherence tomography (PT-OCT) in vivo. Based on strong PT response of gold...

Heo, Jung; Jang, Eunji; Haam, Seungjoo; Oh, Seung Jae; Huh, Yong-Min; Suh, Jin-Suck; Chung, Euiheon; Joo, Chulmin

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

E-Print Network 3.0 - african gold mines Sample Search Results  

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

Environmental Sciences and Ecology ; Biology and Medicine 2 GREAT EXPEDITIONS: SOUTH AFRICA with Dr. Ilse-Mari Lee Summary: as the Apartheid museum and the Gold Reef mine in...

382

Unusually Small Electrical Resistance of Three-Dimensional Nanoporous Gold in External Magnetic Fields  

Science Journals Connector (OSTI)

We report the electric conductivity of three-dimensional (3D) nanoporous gold at low temperatures and in strong magnetic fields. It was found that topologically disordered 3D nanoporosity leads to extremely low magnetoresistance and anomalous temperature dependence as the characteristic length of nanoporous gold is tuned to be ?14??nm. This study underscores the importance of 3D topology of a nanostructure on electronic transport properties and has implications in manipulating electron transport by tailoring 3D nanostructures.

T. Fujita; H. Okada; K. Koyama; K. Watanabe; S. Maekawa; M. W. Chen

2008-10-16T23:59:59.000Z

383

From Antenna to Assay: Lessons Learned in Lanthanide Luminescence  

SciTech Connect

Ligand-sensitized luminescent lanthanide(III) complexes are of considerable current interest due to their unique photophysical properties (micro- to millisecond lifetimes, characteristic and narrow emission bands, and large Stokes shifts), which make them well suited to serve as labels in fluorescence-based bioassays. The long-lived Ln(III) emission can be temporally resolved from scattered light and background fluorescence, resulting in vastly enhanced measurement sensitivity. One of the challenges in this field is the design of sensitizing ligands that provide highly emissive Ln(III) complexes that also possess sufficient stability and aqueous solubility required for practical applications. In this account we give an overview of some of the general properties of the trivalent lanthanides and follow with a summary of advances made in our laboratory in the development of highly luminescent Tb(III) and Eu(III) complexes for applications in biotechnology. A focus of our research has been the optimization of these compounds as potential commercial agents for use in Homogeneous Time Resolved Fluorescence (HTRF) technology, the requirements and current use of which will be briefly discussed. Our approach involves developing high-stability octadentate Tb(III) and Eu(III) complexes that rely on all-oxygen donor atoms as well as using multi-chromophore chelates to increase molar absorptivity compared to earlier examples that utilize a single pendant antenna chromophore. We have found that ligands based on 2-hydroxyisophthalamide (IAM) provide exceptionally emissive Tb(III) complexes with quantum yield values up to ca. 60%. Solution thermodynamic studies have indicated that these complexes are stable at the nanomolar concentrations required for commercial assays. Through synthetic modification of the IAM-chromophore, in conjunction with time-dependent density functional theory (TD-DFT) calculations, we have developed a method to predict absorption and emission properties of these chromophores as a tool to guide ligand design. Additionally we have investigated chiral IAM ligands that yield Tb(III) complexes possessing both high quantum yield values and strong circularly polarized luminescence (CPL) activity. To efficiently sensitize Eu(III) emission, we have utilized ligands based on the 1-hydroxypyridin-2-one (1,2-HOPO) chelate, which are remarkable since they combine both excellent photophysical properties in addition to exceptional aqueous stabilities. A more compete understanding of this chromophore has been achieved by combining low temperature phosphorescence measurements with the same TD-DFT approach used with the IAM system. Also, Eu(III) complexes with strong CPL activity have been obtained through preparation of chiral 1,2-HOPO ligands. Using the unique spectroscopic properties of Eu(III), we have also undertaken the kinetic analysis of radiative and non-radiative decay pathways for a series of complexes, which has highlighted the importance of the metal ion symmetry on the ensuing photophysical properties. Lastly, the commercial development of a Tb-IAM compound that offers improved performance in the common HTRF platform and has the potential to vastly improve the sensitivity of measurements carried out using this technique is presented.

Moore, Evan; Samuel, Amanda; Raymond, Kenneth

2008-09-25T23:59:59.000Z

384

Validation of the Electrical Properties of the ITER ICRF Antenna using Reduced-Scale Mock-Ups  

SciTech Connect

Experimental measurements on reduced-scale mock-ups allow validating the electrical properties and RF numerical optimization of the ITER ICRF antenna. Frequency response in the different regions of the antenna is described and key parameters for performance improvement are given. Coupling is improved by acting on the front-face geometry (strap width, antenna box depth and vertical septa recess). The 4-port junction acts as a frequency filter and together with the service stub performs pre-matching in the whole frequency band. Influence of the Faraday screen on coupling is limited. The effect of voltage limitation on the maximum total radiated power is given. The importance of a good decoupling network and of grounding is emphasized. Finally the control of the antenna wave spectrum is performed by implementing feedback controlled load-resilient matching and decoupling options and control algorithms are tested.

Dumortier, Pierre; Durodie, Frederic; Grine, Djamel; Kyrytsya, Volodymyr; Louche, Fabrice; Messiaen, Andre; Vervier, Michel; Vrancken, Mark [LPP-ERM/KMS, EURATOM-Belgian State Association, CYCLE, Trilateral Euregio Cluster, B-1000 Brussels (Belgium)

2011-12-23T23:59:59.000Z

385

Operations of the External Conjugate-T Matching System for the A2 ICRH Antennas at JET  

SciTech Connect

The External Conjugate-T (ECT) matching system was successfully commissioned on two A2 ICRH antennas at JET in 2009. The system allows trip-free injection of RF power into ELMy H-mode plasmas in the 32-52 MHz band without antenna phasing restrictions. The ECT demonstrates robust and predictable performance and high load-tolerance during routine operations, injecting up to 4 MW average power into H-mode plasma with Type-I ELMs. The total power coupled to ELMy plasma by all the A2 antennas using the ECT and 3dB systems has been increased to 7 MW. Antenna arcing during ELMs has been identified as a new challenge to high-power ICRH operations in H-mode plasma. The implemented Advanced Wave Amplitude Comparison System (AWACS) has proven to be an efficient protection tool for the ECT scheme.

Monakhov, I.; Graham, M.; Blackman, T.; Mayoral, M.-L.; Nightingale, M.; Sheikh, H.; Whitehurst, A. [Euratom/UKAEA Fusion Association, Culham Science Centre, OX14 3DB, Abingdon (United Kingdom)

2009-11-26T23:59:59.000Z

386

Low pumping energy mode of the "optical bars''/"optical lever" topologies of gravitational-wave antennae  

E-Print Network (OSTI)

The ``optical bars''/``optical lever'' topologies of gravitational-wave antennae allow to obtain sensitivity better that the Standard Quantum Limit while keeping the optical pumping energy in the antenna relatively low. Element of the crucial importance in these schemes is the local meter which monitors the local test mirror position. Using cross-correlation of this meter back-action noise and its measurement noise it is possible to further decrease the optical pumping energy. In this case the pumping energy minimal value will be limited by the internal losses in the antenna only. Estimates show that for values of parameters available for contemporary and planned gravitational-wave antennae, sensitivity about one order of magnitude better than the Standard Quantum Limit can be obtained using the pumping energy about one order of magnitude smaller energy than is required in the traditional topology in order to obtain the the Standard Quantum Limit level of sensitivity.

F. Ya. Khalili

2003-04-16T23:59:59.000Z

387

SiGe receiver front ends and flip-chip integrated wideband antennas for millimeter-wave passive imaging  

E-Print Network (OSTI)

SiGe wideband 77-GHz and 94-GHz front end receivers with integrated antennas for passive imaging have been designed and characterized. These front end systems exhibit wideband performance with the highest gain and lowest ...

Powell, Johnna, 1980-

2009-01-01T23:59:59.000Z

388

The relationship between maximum tolerated light intensity and photoprotective energy dissipation in the photosynthetic antenna: chloroplast gains and losses  

Science Journals Connector (OSTI)

...tolerated light intensity and photoprotective energy dissipation in the photosynthetic antenna...photoinhibition by non-photochemical energy dissipation (NPQ) has been recently...membrane. protective non-photochemical energy dissipation|thylakoid membrane|photosystem...

2014-01-01T23:59:59.000Z

389

Modification of Gold Catalysis withModification of Gold Catalysis with Aluminum Phosphate for OxygenAluminum Phosphate for Oxygen--Reduction ReactionReduction Reaction  

E-Print Network (OSTI)

Ford Toshiba Samsung Byungwoo Park's Group #12;Scheme of Fuel Cells Load e- e- Hydrogen Methanol + Water (DMFC· Morphology of Au/AlPO4 Nanocomposite Catalyst · Oxygen Reduction Activity ­ Hydrogen Peroxide Intermediate to Gold Seoul National University Yejun Park et al. 22Byungwoo Park's Group #12;Applications of Fuel Cells

Park, Byungwoo

390

Synthesis and Characterization of Gold Clusters Ligated with 1,3-Bis(dicyclohexylphosphino)propane  

SciTech Connect

In this multidisciplinary study we combine chemical reduction synthesis of novel gold clusters in solution with high-resolution analytical mass spectrometry (MS) to gain insight into the composition of the gold clusters and how their size, ionic charge state and ligand substitution influences their gas-phase fragmentation pathways. Ultra small cationic gold clusters ligated with 1,3-bis(dicyclohexylphosphino)propane (DCPP) were synthesized for the first time and introduced into the gas phase using electrospray ionization (ESI). Mass-selected cluster ions were fragmented employing collision induced dissociation (CID) and the product ions were analysed using MS. The solutions were found to contain the multiply charged cationic gold clusters Au9L43+, Au13L53+, Au6L32+, Au8L32+ and Au10L42+ (L = DCPP). The gas-phase fragmentation pathways of these cluster ions were examined systematically employing CID combined with MS. In addition, CID experiments were performed on related gold clusters of the same size and ionic charge state but capped with 1,3-bis(diphenylphosphino)propane (DPPP) ligands containing phenyl functional groups at the two phosphine centers instead of cyclohexane rings. It is shown that this relatively small change in the molecular substitution of the two phosphine centers in diphosphine ligands (C6H11 versus C6H5) exerts a pronounced influence on the size of the species that are preferentially formed in solution during reduction synthesis as well as the gas-phase fragmentation channels of otherwise identical gold cluster ions. The mass spectrometry results indicate that in addition to the length of the alkyl chain between the two phosphine centers, the substituents at the phosphine centers also play a crucial role in determining the composition, size and stability of diphosphine ligated gold clusters synthesized in solution.

Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

2013-09-01T23:59:59.000Z

391

The Genomes On Line Database (GOLD) in 2009: status of genomic and metagenomic projects and their associated metadata  

SciTech Connect

The Genomes On Line Database (GOLD) is a comprehensive resource for centralized monitoring of genome and metagenome projects worldwide. Both complete and ongoing projects, along with their associated metadata, can be accessed in GOLD through precomputed tables and a search page. As of September 2009, GOLD contains information for more than 5800 sequencing projects, of which 1100 have been completed and their sequence data deposited in a public repository. GOLD continues to expand, moving toward the goal of providing the most comprehensive repository of metadata information related to the projects and their organisms/environments in accordance with the Minimum Information about a (Meta)Genome Sequence (MIGS/MIMS) specification.

Liolios, Konstantinos; Chen, Amy; Mavromatis, Konstantinos; Tavernarakis, Nektarios; Hugenholtz, Phil; Markowitz, Victor; Kyrpides, Nikos C.

2009-09-01T23:59:59.000Z

392

ORIGIN OF THE AURIFEROUS BARITE-BASE METAL AND GOETHITE STAGES OF THE SUMMITVILLE HIGH SULFIDATION GOLD DEPOSIT, COLORADO, USA.  

E-Print Network (OSTI)

??The Summitville high-sulfidation gold deposit is hosted by a volcanic dome consisting of the South Mountain Quartz Latite that was erupted 23 Ma ago during (more)

Russin, Teresa Z.

2009-01-01T23:59:59.000Z

393

Three-dimensional antenna coupling to core plasma in fusion devices  

SciTech Connect

A complete understanding of the RF physics from the launcher to the plasma core is required to fully analyze RF experiments and to evaluate the performance of RF antenna designs in ITER. This understanding requires a consistent model for the RF power launching system, propagation and absorption through the edge region, and the response of the core plasma to the RF power. As a first step toward such a model, the three-dimensional (3D) antenna modeling code, RANT3D, has been coupled with the reduced order full wave code, PICES. Preliminary results from this model are presented in this paper for parameters similar to those found in the DIII-D experiment.

Carter, M.D.; Jaeger, E.F.; Stallings, D.C.; Galambos, J.D.; Batchelor, D.B.; Wang, C.Y.

1995-09-01T23:59:59.000Z

394

Highly tunable ultra-narrow-resonances with optical nano-antenna phased arrays in the infrared  

E-Print Network (OSTI)

We report our recent development in pursuing high Quality-Factor (high-Q factor) plasmonic resonances, with vertically aligned two dimensional (2-D) periodic nanorod arrays. The 2-D vertically aligned nano-antenna array can have high-Q resonances varying arbitrarily from near infrared to terahertz regime, as the antenna resonances of the nanorod are highly tunable through material properties, the length of the nanorod, and the orthogonal polarization direction with respect to the lattice surface,. The high-Q in combination with the small optical mode volume gives a very high Purcell factor, which could potentially be applied to various enhanced nonlinear photonics or optoelectronic devices. The 'hot spots' around the nanorods can be easily harvested as no index-matching is necessary. The resonances maintain their high-Q factor with the change of the environmental refractive index, which is of great interest for molecular sensing.

Li, Shi-Qiang; Guo, Peijun; Buchholz, D Bruce; Qiu, Ziwei; Ketterson, John B; Ocola, Leonidas E; Sakoda, Kazuaki; Chang, Robert P H

2014-01-01T23:59:59.000Z

395

Benchmarking Exercises To Validate The Updated ELLWF GoldSim Slit Trench Model  

SciTech Connect

The Savannah River National Laboratory (SRNL) results of the 2008 Performance Assessment (PA) (WSRC, 2008) sensitivity/uncertainty analyses conducted for the trenches located in the EArea LowLevel Waste Facility (ELLWF) were subject to review by the United States Department of Energy (U.S. DOE) Low-Level Waste Disposal Facility Federal Review Group (LFRG) (LFRG, 2008). LFRG comments were generally approving of the use of probabilistic modeling in GoldSim to support the quantitative sensitivity analysis. A recommendation was made, however, that the probabilistic models be revised and updated to bolster their defensibility. SRS committed to addressing those comments and, in response, contracted with Neptune and Company to rewrite the three GoldSim models. The initial portion of this work, development of Slit Trench (ST), Engineered Trench (ET) and Components-in-Grout (CIG) trench GoldSim models, has been completed. The work described in this report utilizes these revised models to test and evaluate the results against the 2008 PORFLOW model results. This was accomplished by first performing a rigorous code-to-code comparison of the PORFLOW and GoldSim codes and then performing a deterministic comparison of the two-dimensional (2D) unsaturated zone and three-dimensional (3D) saturated zone PORFLOW Slit Trench models against results from the one-dimensional (1D) GoldSim Slit Trench model. The results of the code-to-code comparison indicate that when the mechanisms of radioactive decay, partitioning of contaminants between solid and fluid, implementation of specific boundary conditions and the imposition of solubility controls were all tested using identical flow fields, that GoldSim and PORFLOW produce nearly identical results. It is also noted that GoldSim has an advantage over PORFLOW in that it simulates all radionuclides simultaneously - thus avoiding a potential problem as demonstrated in the Case Study (see Section 2.6). Hence, it was concluded that the follow-on work using GoldSim to develop 1D equivalent models of the PORFLOW multi-dimensional models was justified. The comparison of GoldSim 1D equivalent models to PORFLOW multi-dimensional models was made at two locations in the model domains - at the unsaturated-saturated zone interface and at the 100m point of compliance. PORFLOW model results from the 2008 PA were utilized to investigate the comparison. By making iterative adjustments to certain water flux terms in the GoldSim models it was possible to produce contaminant mass fluxes and water concentrations that were highly similar to the PORFLOW model results at the two locations where comparisons were made. Based on the ability of the GoldSim 1D trench models to produce mass flux and concentration curves that are sufficiently similar to multi-dimensional PORFLOW models for all of the evaluated radionuclides and their progeny, it is concluded that the use of the GoldSim 1D equivalent Slit and Engineered trenches models for further probabilistic sensitivity and uncertainty analysis of ELLWF trench units is justified. A revision to the original report was undertaken to correct mislabeling on the y-axes of the compliance point concentration graphs, to modify the terminology used to define the ''blended'' source term Case for the saturated zone to make it consistent with terminology used in the 2008 PA, and to make a more definitive statement regarding the justification of the use of the GoldSim 1D equivalent trench models for follow-on probabilistic sensitivity and uncertainty analysis.

Taylor, G. A.; Hiergesell, R. A.

2013-11-12T23:59:59.000Z

396

Improved Connectivity using Hybrid Uni/Omni-Directional Antennas in Sensor Networks  

E-Print Network (OSTI)

the capability of networks to be able to report sensed information. The ability of member nodes to communicate with each other and collectively report data largely depends on connectivity. Density of node deployment, the transmission radius of the antenna... and the communication paradigm employed has a significant effect on connectivity. A network deployment is said to be connected when every node within the network is capable of communicating, either via multi-hops or direct links to every other node in the network...

Kwon, Ji Heon

2008-05-27T23:59:59.000Z

397

Measurement of ion cyclotron emissions by use of ICRF heating antennas in LHD  

Science Journals Connector (OSTI)

Ion cyclotron emissions (ICEs) were clearly detected in the Large Helical Device (LHD) during perpendicular neutral beam (NB) injection. Antennas for the ion cyclotron range of frequencies (ICRF) heating were used as probes. The frequencies of \\{ICEs\\} were proportional to magnetic field strength. The location of ICE excitation was a peripheral region of plasma and the source particles were lost-ions injected by the perpendicular NB.

K. Saito; H. Kasahara; T. Seki; R. Kumazawa; T. Mutoh; T. Watanabe; F. Shimpo; G. Nomura; M. Osakabe; M. Ichimura; H. Higaki; A. Komori

2009-01-01T23:59:59.000Z

398

Study of TEXTOR ICRF Antenna Coupling in the ICWC Mode of Operation  

SciTech Connect

Ion Cyclotron Wall Conditioning (ICWC) discharges, in pulsed-mode operation, were carried out in TEXTOR to simulate a scenario of ITER wall conditioning at half-field. The ICWC discharges were performed in a continuous Helium flow with adjunction of molecular Hydrogen, puffed after the ICRF ignition thus achieving better antenna coupling in the Mode Conversion scenario with improved ICWC performance. Reproducible generation of ICRF plasmas and reliable wall conditioning, after proper wall preloading with Deuterium glow, were achieved by coupling the RF power at 29 MHz from one or two ICRF antennas at different toroidal magnetic fields (different cyclotron harmonics). The antenna coupling properties were analyzed in relation to wall conditioning output (removal rates) for selected marker masses. Present study of ICWC at low and high power density per particles (at different gas pressures) emphasizes on the efficiency of the application of stationary, oscillating or rotating poloidal magnetic field. These experimental results will be compared with the predictions of a 0-D RF plasma production model.

Paul, M. K.; Lyssoivan, A.; Koch, R.; Van Wassenhove, G.; Bertschinger, G.; Sergienko, G.; Vervier, M. [LPP-ERM/KMS, Association Euratom-Belgian State, 1000 Brussels (Belgium); Philipps, V.; Laengner, R.; Unterberg, B. [Institut fuer Energieforschung-Plasmaphysik FZ Juelich, Euratom Association, 52425 Juelich (Germany)

2009-11-26T23:59:59.000Z

399

A New Gold Pan For The West- Discovering Blind Geothermal Systems With  

Open Energy Info (EERE)

Gold Pan For The West- Discovering Blind Geothermal Systems With Gold Pan For The West- Discovering Blind Geothermal Systems With Shallow Temperature Surveys Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: A New Gold Pan For The West- Discovering Blind Geothermal Systems With Shallow Temperature Surveys Details Activities (6) Areas (4) Regions (0) Abstract: The use of rapidly deployable 2-meter-deep shallow temperature surveys has led to the discovery of at least two blind geothermal systems in Nevada, USA and has helped to define the spatial extent of thermal anomalies at two other locations. At Teels Marsh, two shallow temperature anomalies with a combined strike length of almost 4 km were identified adjacent to a Quaternary fault on the west side of the playa. At Rhodes Marsh, a thermal anomaly at least 5 km long was located adjacent to

400

Photoacoustic generation by a gold nanosphere: from the linear to the nonlinear thermoelastic regime  

E-Print Network (OSTI)

We theoretically investigate the photoacoustic generation by a gold nanosphere in water in the thermoelastic regime. Photoacoustic signals are predicted numerically based on the successive resolution of a thermal diffusion problem and a thermoelastic problem, taking into account the finite size of the gold nanosphere, thermoelastic and elastic properties of both water and gold, and the temperature-dependence of the thermal expansion coefficient of water. For sufficiently high illumination fluences, this temperature dependence yields a nonlinear relationship between the photoacoustic amplitude and the fluence. For nanosecond pulses in the linear regime, we show that more than $90\\ \\%$ of the emitted photoacoustic energy is generated in water, and the thickness of the generating layer around the particle scales close to the square root of the pulse duration. The amplitude of the photoacoustic waves in the linear regime are accurately predicted by the point-absorber model introduced by Calasso and Diebold, but o...

Prost, Amaury

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Fabrication and characterization of nanoclay composites using synthesized polymeric thiol surfactants assembled on gold nanoparticles  

Science Journals Connector (OSTI)

Abstract In the present work, the nanoclay composites were fabricated using the synthesized poly 6-(3-aminophenoxy) hexane-1-thiol, poly 8-(3-aminophenoxy) octane-1-thiol and poly 10-(3-aminophenoxy) decane-1-thiol surfactants with gold nanoparticles. The polymeric thiol surfactants were first assembled on gold nanoparticles and then impregnated into the clay matrix. Different spectroscopic and microscopic techniques such as X-ray diffraction (XRD), Scanning electron microscope (SEM) and Transmission microscope (TEM) were used to characterize the fabricated nanoclay composites. The results showed that the polymeric thiol surfactants assembled on gold nanoparticles are located in the interlayer space of the clay mineral and affected the clay structure.

E.M.S. Azzam; S.M. Sayyah; A.S. Taha

2013-01-01T23:59:59.000Z

402

Charge Retention by Gold Clusters on Surfaces Prepared Using Soft Landing of Mass Selected Ions  

SciTech Connect

Monodisperse gold clusters have been prepared on surfaces in different charge states through soft landing of mass-selected ions. Ligand-stabilized gold clusters were prepared in methanol solution by reduction of chloro(triphenylphosphine)gold(I) with borane tert-butylamine complex in the presence of 1,3-bis(diphenylphosphino)propane. Electrospray ionization was used to introduce the clusters into the gas-phase and mass-selection was employed to isolate a single ionic cluster species (Au11L53+, L = 1,3-bis(diphenylphosphino)propane) which was delivered to surfaces at well controlled kinetic energies. Using in-situ time of flight secondary ion mass spectrometry (TOF-SIMS) it is demonstrated that the Au11L53+ cluster retains its 3+ charge state when soft landed onto the surface of a 1H,1H,2H,2H-

Johnson, Grant E.; Priest, Thomas A.; Laskin, Julia

2012-01-24T23:59:59.000Z

403

A dynamic model of a V-shaped free-piston engine  

Science Journals Connector (OSTI)

A model of one of the classes of a free-piston Stirling engine, namely a two-piston engine with V...

M. A. Kutyavin

2011-06-01T23:59:59.000Z

404

Modeling and experimental characterization of stepped and v-shaped (311) defects in silicon  

SciTech Connect

We propose an atomistic model to describe extended (311) defects in silicon. It is based on the combination of interstitial and bond defect chains. The model is able to accurately reproduce not only planar (311) defects but also defect structures that show steps, bends, or both. We use molecular dynamics techniques to show that these interstitial and bond defect chains spontaneously transform into extended (311) defects. Simulations are validated by comparing with precise experimental measurements on actual (311) defects. The excellent agreement between the simulated and experimentally derived structures, regarding individual atomic positions and shape of the distinct structural (311) defect units, provides strong evidence for the robustness of the proposed model.

Marqus, Luis A., E-mail: lmarques@ele.uva.es; Aboy, Mara [Departamento de Electrnica, Universidad de Valladolid, E.T.S.I. de Telecomunicacin, 47011 Valladolid (Spain); Dudeck, Karleen J.; Botton, Gianluigi A. [Department of Materials Science and Engineering, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7 (Canada); Knights, Andrew P. [Department of Engineering Physics, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7 (Canada); Gwilliam, Russell M. [Surrey Ion Beam Centre, University of Surrey, Guildford, Surrey GU2 7XH (United Kingdom)

2014-04-14T23:59:59.000Z

405

Tellurides, selenides and Bi-mineral assemblages from the Ro Narcea Gold Belt, Asturias, Spain: genetic implications in CuAu and Au skarns  

Science Journals Connector (OSTI)

Gold ores in skarns from the Ro Narcea Gold Belt are associated with BiTe(Se)-bearing minerals. These mineral assemblages have been used to compare two different skarns from this belt, a CuAu skarn (calcic...

A. Cepedal; M. Fuertes-Fuente; A. Martn-Izard

2006-07-01T23:59:59.000Z

406

Cavity ringdown laser absorption spectroscopy and time-of-flight mass spectroscopy of jet-cooled gold silicides  

E-Print Network (OSTI)

bonding trends for the three coinage metal silicide diatoms. © 1995 American Institute of Physics. I. INTRODUCTION As is the case for the other coinage metal silicides, cur- rent research on gold­silicides has-cooled gold silicides J. J. Scherer,a) J. B. Paul, C. P. Collier, A. O'Keefe,b) and R. J. Saykally Department

Cohen, Ronald C.

407

Self-Assembly of Gold Nanorods B. Nikoobakht, Z. L. Wang, and M. A. El-Sayed*,  

E-Print Network (OSTI)

ARTICLES Self-Assembly of Gold Nanorods B. Nikoobakht, Z. L. Wang, and M. A. El-Sayed*, Laser 27, 2000 Self-assembly of gold nanorods (NRs) with aspect ratio of 4.6 (12 nm in diameter and 50 and orientation symmetries of the self-assembled structures are determined. The factors affecting the formation

Wang, Zhong L.

408

Copper-free click chemistry as an emerging tool for the programmed ligation of DNA-functionalised gold  

E-Print Network (OSTI)

Copper-free click chemistry as an emerging tool for the programmed ligation of DNA-modified gold nanoparticles using copper-free click chemistry. Gold nanoparticles functionalized with a discrete of the copper-free, `click-ligation' method allows for its universal applicability and opens up new avenues

Zheludev, Nikolay

409

Size-dependent mobility of gold nano-clusters during growth on chemically modified graphene  

SciTech Connect

Gold nano-clusters were grown on chemically modified graphene by direct sputter deposition. Transmission electron microscopy of the nano-clusters on these electron-transparent substrates reveals an unusual bimodal island size distribution (ISD). A kinetic Monte Carlo model of growth incorporating a size-dependent cluster mobility rule uniquely reproduces the bimodal ISD, providing strong evidence for the mobility of large clusters during surface growth. The cluster mobility exponent of ?5/3 is consistent with cluster motion via one-dimensional diffusion of gold atoms around the edges of the nano-clusters.

Bell, Gavin R., E-mail: gavin.bell@warwick.ac.uk; Dawson, Peter M.; Pandey, Priyanka A.; Wilson, Neil R. [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Mulheran, Paul A. [Department of Chemical and Process Engineering, University of Strathclyde, James Weir Building, 75 Montrose St., Glasgow G1 1XJ (United Kingdom)

2014-01-01T23:59:59.000Z

410

Gold-titania interface toughening and thermal conductance enhancement using an organophosphonate nanolayer  

SciTech Connect

We demonstrate that a mercaptan-terminated organophosphonate nanolayer at gold-titania interfaces can give rise to two- to three-fold enhancement in the interfacial fracture toughness and thermal conductance. Electron spectroscopy reveals that interfacial delamination occurs at the metal-molecule interface near the gold-sulfur bonds, consistent with density functional theory calculations of bond energies. Qualitative correlation between interfacial fracture toughness and bond energies suggest that organophosphonate nanolayers are resilient to humidity-induced degradation. These results, and the versatility of organophosphonates as surface functionalization agents for technologically relevant materials, unlock uncharted avenues for molecular engineering of interfaces in materials and devices for a variety of applications.

Chow, Philippe K.; O'Brien, Peter; Ramanath, Ganpati [Rensselaer Polytechnic Institute, Department of Materials Science and Engineering, Troy, New York 12180 (United States)] [Rensselaer Polytechnic Institute, Department of Materials Science and Engineering, Troy, New York 12180 (United States); Cardona Quintero, Y.; Ramprasad, R. [Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269 (United States)] [Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269 (United States); Hubert Mutin, P. [Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Universite Montpellier 2, CC 1701, Place Eugene Bataillon, 34095 Montpellier Cedex 5 (France)] [Institut Charles Gerhardt Montpellier, UMR 5253 CNRS-UM2-ENSCM-UM1, Universite Montpellier 2, CC 1701, Place Eugene Bataillon, 34095 Montpellier Cedex 5 (France); Lane, Michael [Chemistry Department, Emory and Henry College, Emory, Virginia 24327 (United States)] [Chemistry Department, Emory and Henry College, Emory, Virginia 24327 (United States)

2013-05-20T23:59:59.000Z

411

MEASUREMENTS OF INTRA-BEAM SCATTERING GROWTH TIMES WITH GOLD BEAM BELOW TRANSITION IN RHIC.  

SciTech Connect

While RHIC is filled with beam, bunches are stored for up to several minutes at the injection energy before acceleration starts. In gold operation, the RHIC injection energy is below transition. A bunch length increase, and correspondingly an increase in the longitudinal emittance, can lead to particle loss during transition crossing and rebucketing into the storage buckets. The longitudinal growth of gold beams in RHIC at injection is dominated by intra-beam scattering. Measurements of longitudinal growth times are presented and compared with computations.

FISCHER,W.; BAI,M.; BLASKIEWICZ,M.; BRENNAN,J.M.; CAMERON,P.; CONNOLLY,R.; LEHRACH,A.; PARZEN,G.; TEPIKIAN,S.; ZENO,K.; VAN ZEIJTS,J.

2001-06-18T23:59:59.000Z

412

ITP Mining: Energy and Environmental Profile of the U.S. Mining Industry: Chapter 7: Gold & Silver  

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

Department of Energy Department of Energy 7 Gold & Silver Gold has played a prominent role in world economic and political events. Most of the gold mined over the past 6000 years exists mainly in the form of refined gold held by governments as monetary reserve assets or by individuals in the form of jewelry, bullion coins, or small bars held as insurance against currency devaluation. In modern usage, gold is also used worldwide in numerous electronic, industrial, and dental applications, but more than three-fourths of the world's total annual demand goes toward the fabrication of jewelry and the minting of coins. Silver has three primary applications: industrial and decorative uses, photography, and jewelry and silverware. Together, these categories represent more than 95 percent of

413

Remote optical sensing on the nanometer scale with a bowtie aperture nano-antenna on a SNOM fiber tip  

E-Print Network (OSTI)

Plasmonic nano-antennas have proven the outstanding ability of sensing chemical and physical processes down to the nano-meter scale. Sensing is usually achieved within the highly confined optical fields generated resonantly by the nano-antennas, i.e. in contact to the nano-structures. In these paper, We demonstrate the sensing capability of nano-antennas to their larger scale environment, well beyond their plasmonic confinement volume, leading to the concept of 'remote' (non contact) sensing on the nano-meter scale. On the basis of a bowtie-aperture nano-antenna (BNA) integrated at the apex of a SNOM fiber tip, we introduce an ultra-compact, move-able and background-free optical nano-sensor for the remote sensing of a silicon surface (up to distance of 300 nm). Sensitivity of the BNA to its large scale environment is high enough to expect the monitoring and control of the spacing between the nano-antenna and a silicon surface with sub-nano-meter accuracy. This work paves the way towards a new class of nano-po...

Atie, Elie M; Eter, Ali El; Salut, Roland; Nedeljkovic, Dusan; Tannous, Tony; Baida, Fadi I; Grosjean, Thierry

2015-01-01T23:59:59.000Z

414

Vanadium-rich minerals of the pumpellyite group from the Hemlo gold deposit, Ontario  

Science Journals Connector (OSTI)

...Mg) FROMTHE HEMLOGOLDDEFOSIT. AND CPMPARISONWTTUPUMPELLYTIE-CROUPMINERALS Ysib a(A) (A) PO Efem TABLE 2. COMPO$IIONS OF THE V.RICH PUMPELLYTIE-GROUP MINERAL FROM TIIE IIEMLO GOLD DEPOSTT 1 2 3 4 5 6 7, 3.t3 33,32 34.52 U.52 v...

Yuanming Pan; M. E. Fleet

415

Detection of tumor markers based on extinction spectra of visible light passing through gold nanoholes  

E-Print Network (OSTI)

Detection of tumor markers based on extinction spectra of visible light passing through gold on glass slides can be used as biochemical sensors based on extinction spectra of visible light passing drawn exten- sive attention for applications in the areas of medical and environmental diagnostics.1

Chen, Wilfred

416

Excitation and Far field Spectroscopy of surface plasmons in Gold nanostructures  

E-Print Network (OSTI)

in the study of the interaction of light with periodic metal structures ..................................................... 4 F. Formulation of the research aim ................................................. 6 II... ....................................................................... 24 6 The influence of the thickness of the gold film on the properties of SPs: SP resonance curves at 633 nm for different film thicknesses .................................. 25 7 A portion of the SEM data for Sample 2 (cross section...

Peng, Siying

2011-08-08T23:59:59.000Z

417

May/June 1997 More on Cotton Fire Ants Ulee's Gold  

E-Print Network (OSTI)

May/June 1997 More on Cotton Fire Ants Ulee's Gold On the Web Honey Bee History Bee School WAS in Tucson Pollination Evaluation More on Cotton Some readers may wonder why I mention cotton and cotton pest control so frequently in this newsletter. The reason for this is that cotton is one of the few summer

Ferrara, Katherine W.

418

IF BIODIVERSITY WERE AN OLYMPIC SPORT, life on land would take home the gold and the  

E-Print Network (OSTI)

, their numbers left marine biodiversity behind. The trigger for this terrestrial explosion, Grosberg and VermeijIF BIODIVERSITY WERE AN OLYMPIC SPORT, life on land would take home the gold and the seamightnotevenenterateam.Giventhevast- nessoftheoceansandthelengthoftimelifehas thrived there, you might expect marine

Grosberg, Rick

419

TECHNICAL ADVANCE 3D gold in situ labelling in the EM  

E-Print Network (OSTI)

October 2001. * For correspondence (fax +44 1603 450022; e-mail peter.shaw@bbsrc.ac.uk). Summary We have with good ultrastructural preservation. Vibratome sections of plant tissue were labelled throughout their thickness with 1 nm gold antibodies and then silver enhanced, embedded in resin and sectioned for electron

Shaw, Peter

420

Highly Efficient and Controllable PEGylation of Gold Nanoparticles Prepared by Femtosecond Laser Ablation in Water  

Science Journals Connector (OSTI)

The second sample (abbreviated as chemically generated gold nanoparticle) was purchased from Ted Pella (Redding, CA) and was prepared via the standard sodium citrate reduction of tetrachloroaurate (HAuCl4) methodology. ... Sylvestre, J. P.; Poulin, S.; Kabashin, A. V.; Sacher, E.; Meunier, M.; Luong, J. H. T. J. Phys. ...

Wei Qian; Makoto Murakami; Yuki Ichikawa; Yong Che

2011-10-19T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Plasmonic enhancement of thin-film solar cells using gold-black C.J. Fredricksena  

E-Print Network (OSTI)

Plasmonic enhancement of thin-film solar cells using gold-black coatings C.J. Fredricksena , D. R thin-film amorphous-silicon solar cells enhance the short-circuit current by 20% over a broad spectrum and locally enhance the field strength. Keywords: plasmonics, thin-film, solar cell, metallic nanoparticles

Peale, Robert E.

422

Lessons Learned from Continuous Commissioning of a LEED Gold Building in Texas  

E-Print Network (OSTI)

The subject building is a relatively new building with 120,000 square feet located in Texas and was the first LEED Gold building in the area. To earn the title of a green building, the designers of this high performance building included many...

Bynum, J.; Claridge, D. E.

2008-09-22T23:59:59.000Z

423

Water as Buffer Material for Gold Nanocluster Growth Elad Gross, Yonatan Horowitz, and Micha Asscher*  

E-Print Network (OSTI)

in the same buffer layer thickness range. Significantly different morphology of the clusters is obtained when are the basis for industrial heterogeneous catalysis.1-4 Gold nanoclusters held on oxide substrates were silicon oxide, SiO2/ Si(100), was chosen as the substrate in this study as a model for silica supports

Asscher, Micha

424

12MO-2008-03 Gold Nanoparticle Stabilized in Biocompatible Aqueous Media  

E-Print Network (OSTI)

12MO-2008-03 Gold Nanoparticle Stabilized in Biocompatible Aqueous Media The invention provides a method of synthesizing nanoparticles using environmentally benign reducing agents, non-toxic materials main steps in the preparation of metal nanoparticles include using an environmentally benign reducing

Mohanty, Saraju P.

425

Planar Gold Nanoparticle Clusters as Microscale Mirrors Jin Young Kim and Frank E. Osterloh*  

E-Print Network (OSTI)

Planar Gold Nanoparticle Clusters as Microscale Mirrors Jin Young Kim and Frank E. Osterloh,4,5 In extension of our work on nanoparticle-based waveguides,6-9 we report here a scalable chemical synthesis of micrometer-scale mirrors based on Au nanoparticles and Ca2Nb3O10 nanoplates. Similar to their macroscale

Osterloh, Frank

426

Equation of state data for gold in the pressure range <10 TPa  

Science Journals Connector (OSTI)

We report experimental data on the equation of state of gold in the pressure range 210 TPa obtained using laser-driven shock waves. The experiments have been realized using an iodine high-power laser with subnanosecond pulses and techniques like phase zone plates and hohlraums to produce spatially uniform shocks. Our data are compared with existing equation of state models.

Dimitri Batani, Antonio Balducci, Daniele Beretta, Andrea Bernardinello, Thorsten Lwer, Michel Koenig, Alessandra Benuzzi, Bernard Faral, and Tom Hall

2000-04-01T23:59:59.000Z

427

REMNANT COLLOFORM PYRITE AT THE HAILE GOLD DEPOSIT, SOUTH CAROLINA: A TEXTURAL KEY TO GENESIS  

Science Journals Connector (OSTI)

...to100-mum-wide) late gold having a composition of Au0.8-0.9Ag0.2-0...this type and mineralogical and agrochemical evidence thatprovides compelling...metal ores metamorphism mineral composition mineral deposits, genesis mineralization...

Nora Foley; Robert A. Ayuso; Robert Seal II

428

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 52, NO. 2, FEBRUARY 2004 555 Development and Analysis of a Folded Shorted-Patch  

E-Print Network (OSTI)

and Analysis of a Folded Shorted-Patch Antenna With Reduced Size RongLin Li, Senior Member, IEEE, Gerald De Abstract--The length of a wall-shorted rectangular patch antenna can be reduced from 0 4 to 0 8 by a simple folding operation, which results in a stacked shorted-patch (S-P) structure with a resonant frequency

Tentzeris, Manos

429

The Aperture-coupled U-slotted Patch Antenna WX.Zbang*, C.S.Pyo**,S.IJeon**, S.P.Lee**, N.HMyung***  

E-Print Network (OSTI)

The Aperture-coupled U-slotted Patch Antenna WX.Zbang*, C.S.Pyo**,S.IJeon**, S.P.Lee**, N The microstrip patch used as a resonant antennahas been rid of it main shortageof narrow band, various broadband patch antennas had been developed by means of the multiple resonance principle. Among them the U

Myung, Noh-Hoon

430

Mobile Robot Coordination and navigation with directional antennas in positionless Wireless Sensor Networks  

Science Journals Connector (OSTI)

Three schemes are proposed to coordinate and navigate mobile robots with directional antennas in a positionless wireless sensor network for the purpose of emergency rescue. The k-farthest-node forwarding scheme is for Waiting-for-Rescue (WFR) nodes to broadcast packets to ask mobile robots to come to help. The Mobile Robot Coordination (MRC) is to coordinate multiple mobile robots so that each WFR node is associated one nearby mobile node which is navigated by the Tree Assisted Navigation (TAN) scheme to fast reach the WFR node. The schemes' effectiveness is verified by the ns-2 simulator.

Jehn-Ruey Jiang; Yung-Liang Lai; Fu-Cheng Deng

2011-01-01T23:59:59.000Z

431

Robotic localization of hostile networked radio sources with a directional antenna  

E-Print Network (OSTI)

networks. Imagine a scenario, there is a sensor network deployed by enemy. We dispatch a mobile robot equipped with directional Radio Frequency (RF) antenna to search and destroy the networked radio sources. We need an effective scheme to guide the robot... to take the best guess for each step given the current information and known knowledge. Mathemat- ically, Bayes rule is often used to compute the posterior possibility p(X|d) according to the prior possibility p(X). p(X|d) = etap(d|X)p(X). (3.1) Suppose we...

Hu, Qiang

2007-04-25T23:59:59.000Z

432

Extending the scanning angle of a phased array antenna by using a null-space medium  

E-Print Network (OSTI)

By introducing a columnar null-space region as the reference space, we design a radome that can extend the scanning angle of a phased array antenna (PAA) by a predetermined relationship (e.g. a linear relationship between the incident angle and steered output angle can be achieved). After some approximation, we only need two homogeneous materials to construct the proposed radome layer by layer. This kind of medium is called a null-space medium, which has been studied and fabricated for realizing hyper-lenses and some other devices. Numerical simulations verify the performance of our radome.

Sun, F

2014-01-01T23:59:59.000Z

433

Noble reactions for the actinides: safe gold-based access to organouranium and azide complexes  

SciTech Connect

Gold has had a profound impact on organic chemistry; its compounds are spectacular catalysts for many organic transformations involving the formation of C-C, C-O, C-N and CoS bonds, and have enabled unprecedented pathways for the functionalization of C-H and C-C bonds. In general, gold complexes have not been exploited as reagents in organometallic or inorganic chemistry, although a few gold(l) aryl and alkynyl compounds have been reported to undergo transmetalation with transition metal complexes. We have been developing methods for functionalizing uranium complexes and have shown that Cu(l)-X reagents effect the oxidation of uranium with formation of U-X bonds, providing easy chemical control over uranium in oxidation states ranging from U{sup III}{yields}U{sup VI}. Although a logical approach for the direct generation of U-carbon and U-azide bonds, this Cu-based platform is limited in scope as it only works for pure and isolable copper compounds. This is problematic given the instability of organocuprates and copper azides, which can detonate violently as isolated solids. As such, this route has been confined to the synthesis of select uranium phenylacetylide complexes. Over the past few years, a variety of stable gold(l) alkyl, alkenyl, aryl, alkynyl, and azide complexes have been reported, propelling us to investigate their potential as reagents within the oxidative functionalization platform. Unlike the related CU{sup I} systems, Au{sup I} reagents are easily derivatized, and are safe to handle and isolate. Herein, we report that gold(l)-phosphine compounds can undergo a new class of reaction, and are excellent reagents for the oxidative functionalization of uranium with azide and carbon anions.

Thomson, Robert K [Los Alamos National Laboratory; Graves, Christopher R [Los Alamos National Laboratory; Scott, Brian L [Los Alamos National Laboratory; Kiplinger, Jaqueline L [Los Alamos National Laboratory

2008-01-01T23:59:59.000Z

434

A Dual Resonant Microstrip Antenna for UHF RFID in the Cold Chain Using Corrugated Fiberboard as a Substrate  

E-Print Network (OSTI)

wave Smith chart, in which, a fixed value of power transfer efficiency traces a circle around the center of the smith chart whose radius is equal to the magnitude of the power reflection coefficient vector s. This provides a pictorial representation... chart normalized to 35-j110 ? 27 (9) (10) Now using (9), (10) and (5) the realized gain GR of an antenna with a complex load can be obtained as (11). (11) In order to measure the realized gain GR for the antenna shown in Figure 6 we...

Sivakumar, Mutharasu

2008-02-01T23:59:59.000Z

435

Estimation of tumour dose enhancement due to gold nanoparticles during typical radiation treatments: a preliminary Monte Carlo study  

Science Journals Connector (OSTI)

A recent mice study demonstrated that gold nanoparticles could be safely administered and used to enhance the tumour dose during radiation therapy. The use of gold nanoparticles seems more promising than earlier methods because of the high atomic number of gold and because nanoparticles can more easily penetrate the tumour vasculature. However, to date, possible dose enhancement due to the use of gold nanoparticles has not been well quantified, especially for common radiation treatment situations. Therefore, the current preliminary study estimated this dose enhancement by Monte Carlo calculations for several phantom test cases representing radiation treatments with the following modalities: 140 kVp x-rays, 4 and 6 MV photon beams, and 192Ir gamma rays. The current study considered three levels of gold concentration within the tumour, two of which are based on the aforementioned mice study, and assumed either no gold or a single gold concentration level outside the tumour. The dose enhancement over the tumour volume considered for the 140 kVp x-ray case can be at least a factor of 2 at an achievable gold concentration of 7 mg Au/g tumour assuming no gold outside the tumour. The tumour dose enhancement for the cases involving the 4 and 6 MV photon beams based on the same assumption ranged from about 1% to 7%, depending on the amount of gold within the tumour and photon beam qualities. For the 192Ir cases, the dose enhancement within the tumour region ranged from 5% to 31%, depending on radial distance and gold concentration level within the tumour. For the 7 mg Au/g tumour cases, the loading of gold into surrounding normal tissue at 2 mg Au/g resulted in an increase in the normal tissue dose, up to 30%, negligible, and about 2% for the 140 kVp x-rays, 6 MV photon beam, and 192Ir gamma rays, respectively, while the magnitude of dose enhancement within the tumour was essentially unchanged.

Sang Hyun Cho

2005-01-01T23:59:59.000Z

436

The Genomes On Line Database (GOLD) in 2007: status of genomic and metagenomic projects and their associated metadata  

SciTech Connect

The Genomes On Line Database (GOLD) is a comprehensive resource of information for genome and metagenome projects world-wide. GOLD provides access to complete and ongoing projects and their associated metadata through pre-computed lists and a search page. The database currently incorporates information for more than 2900 sequencing projects, of which 639 have been completed and the data deposited in the public databases. GOLD is constantly expanding to provide metadata information related to the project and the organism and is compliant with the Minimum Information about a Genome Sequence (MIGS) specifications.

Fenner, Marsha W; Liolios, Konstantinos; Mavromatis, Konstantinos; Tavernarakis, Nektarios; Kyrpides, Nikos C.

2007-12-31T23:59:59.000Z

437

Gold Coating of Glass Tubes for Gas Chromatography/Fourier Transform Infrared Spectroscopy "Light-Pipe" Gas Cells  

Science Journals Connector (OSTI)

The sensitivity of gas chromatography/Fourier transform infrared spectroscopy (GC/FT-IR) may be significantly improved by use of small bore gold-coated glass gas cells. This note...

Azarraga, L V

1980-01-01T23:59:59.000Z

438

Metal-Cluster-Sensitized Solar Cells. A New Class of Thiolated Gold Sensitizers Delivering Efficiency Greater Than 2%  

Science Journals Connector (OSTI)

A New Class of Thiolated Gold Sensitizers Delivering Efficiency Greater Than 2% ... A new class of metal-cluster sensitizers has been explored for designing high-efficiency solar cells. ... layers, suggesting that even greater photocurrent enhancements may be achievable. ...

Yong-Siou Chen; Hyunbong Choi; Prashant V. Kamat

2013-05-29T23:59:59.000Z

439

Oxygen and Hydroxyl Species Induce Multiple Reaction Pathways for the Partial Oxidation of Allyl Alcohol on Gold  

E-Print Network (OSTI)

, acrolein, over oxygen-precovered gold surfaces occurs via multiple reaction pathways. Utilizing temperature -dehydrogenation via interaction with an oxygen adatom or surface hydroxyl species to generate acrolein. Mediation

Henkelman, Graeme

440

Application of Geothermal Energy to Mineral Processing: Cyanide Heap-Leaching of Low-Grade Gold Ore  

Science Journals Connector (OSTI)

The advent of cyanide heap-leaching for low-grade gold and silver ores has resulted in an unprecedented increase in the output of mines throughout the world. This simple and economical process entails open-pit mi...

Thomas Flynn; Dennis Trexler

1995-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Single-cell resolution in high-resolution synchrotron X-ray CT imaging with gold nanoparticles  

Science Journals Connector (OSTI)

It is demonstrated that single-cell resolution can be obtained ex vivo in the brain of small animals using gold nanoparticles with the synchrotron-based computed tomography technique.

Sch?ltke, E.

2013-12-11T23:59:59.000Z

442

Engineering the macro-nano interface: Designing the directed self-assembly and interfacial interactions of gold nanoparticle monolayers .  

E-Print Network (OSTI)

??Gold nanoparticles in the 1-2 mn core diameter size regime have generated a great deal of interest due to their size-dependent electronic, optical, and catalytic (more)

Jespersen, Michael L., 1979-

2008-01-01T23:59:59.000Z

443

Visualization of gold nanoparticle on the microscopic picture of red blood cell: implication for possible risk of nanoparticle exposure  

Science Journals Connector (OSTI)

In medicine, there is limited knowledge on the toxicity of nanoparticles. In reproductive medicine, there has been limited knowledge on the effect of gold nanoparticle on the human red blood cell. In ... author p...

Viroj Wiwanitkit; Amornpun Sereemaspun

2008-06-01T23:59:59.000Z

444

Excitons in a mirror: Formation of optical bilayers using MoS{sub 2} monolayers on gold substrates  

SciTech Connect

We report coupling of excitons in monolayers of molybdenum disulphide to their mirror image in an underlying gold substrate. Excitons at the direct band gap are little affected by the substrate whereas strongly bound C-excitons associated with a van-Hove singularity change drastically. On quartz substrates only one C-exciton is visible (in the blue) but on gold substrates a strong red-shifted extra resonance in the green is seen. Exciton coupling to its image leads to formation of a mirror biexciton with enhanced binding energy. Estimates of this energy shift in an emitter-gold system match experiments well. The absorption spectrum of MoS{sub 2} on gold thus resembles a bilayer of MoS{sub 2} which has been created by optical coupling. Additional top-mirrors produce an optical bulk..

Mertens, Jan; Baumberg, Jeremy J., E-mail: jjb12@cam.ac.uk [Nanophotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE (United Kingdom); Shi, Yumeng; Yang, Hui Ying, E-mail: yanghuiying@sutd.edu.sg [Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 138682 (Singapore); Molina-Snchez, Alejandro; Wirtz, Ludger [Physics and Materials Science Research Unit, University of Luxembourg, L-1511 Luxembourg (Luxembourg)

2014-05-12T23:59:59.000Z

445

Performance Measurement of 802.11a Wireless Links from UAV to Ground Nodes with Various Antenna Orientations  

E-Print Network (OSTI)

Performance Measurement of 802.11a Wireless Links from UAV to Ground Nodes with Various Antenna measured performance of 802.11a wireless links from an unmanned aerial vehicle (UAV) to ground stations-station elevations. By comparing the performance of 32 simultaneous pairs of UAV and ground station configurations

Kung, H. T.

446

On the Feasibility of making Intelligent Antenna Selection Decision in IEEE 802.15.4 Wireless Sensor Networks  

E-Print Network (OSTI)

. This study provides us the basis to design and implement software defined intelligent antenna switching wildlife tracking, habitat monitoring, forest fire detection, mine safety monitoring to military appli by the University of Paris Est under the PPS program. distortion is due to path loss, multipath fading, radiation

Boyer, Edmond

447

1754 IEEE COMMUNICATIONS LETTERS, VOL. 17, NO. 9, SEPTEMBER 2013 MIMO Wiretap Channels: Secure Transmission Using Transmit Antenna  

E-Print Network (OSTI)

.yeoh@unimelb.edu.au). M. Elkashlan is with the School of Electronic Engineering and Computer Science, Queen Mary, transmit antenna selection (TAS) achieves lower feedback and computational overheads as it only requires by an Australian Research Council (ARC) Discovery Project grant (DP120102607). N. Yang and J. Yuan

Elkashlan, Maged

448

Static antennae act as locomotory guides that compensate for visual motion blur in a diurnal, keen-eyed predator  

Science Journals Connector (OSTI)

...j.1439-0310.2009.01630.x ) 39 Nilsson, NJ . 1984 Shakey the robot. Tech note 323. Menlo Park, CA: SRI International. 40 Cowan, NJ , EJ Ma, M Cutkosky, and RJ Full. 2005 A biologically inspired passive antenna for steering control...

2014-01-01T23:59:59.000Z

449

1610 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 11, 2012 MRI-Derived 3-D-Printed Breast Phantom  

E-Print Network (OSTI)

1610 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, VOL. 11, 2012 MRI-Derived 3-D-Printed Breast--We propose a 3-D-printed breast phantom for use in preclinical experimental microwave imaging studies the proce- dure for generating the 3-D-printed breast phantom and present the measured dielectric properties

Hagness, Susan C.

450

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, VOL. 8, NO. 4, APRIL 2009 1733 Space-Time Duality in Multiple Antenna Channels  

E-Print Network (OSTI)

Abstract--The concept of information transmission in a mul- tiple antenna channel with scattering objects is studied from first physical principles. The amount of information that can be transported of the channel. It is shown that for narrow-band frequency transmission space and time can be decoupled, leading

Franceschetti, Massimo

451

Design study of a new antenna system for steering microwave beam in electron cyclotron heating/current drive system  

Science Journals Connector (OSTI)

The reflector driven in the linear motion to steer the microwave beam for electron cyclotron heating/current drive system, which has considerable merits, especially for reactor environments, has been studied in design. In a typical design, a microwave beam launched from the end of a waveguide is reflected at a concave mirror following a fixed flat mirror. The injection angle can be changed by varying a point of reflection on the concave mirror because of the transition of the normal angle of the concave mirror. The point of reflection is easily controlled by the linear motion of the concave mirror. It is notable that mirror rotation is not required, and the inside of a robust driving shaft can be used to supply the coolant to the mirror. This indicates that the antenna can be designed without a rotation axis, bearings, and a flexible cooling tube close to the plasma which may require frequent maintenance or replacement in a highly radioactive environment. This study shows that the antenna driven in the linear motion has a potential to meet certain specifications, especially with regard to antenna size, steerable range of the beam angle, and beam quality for experiments in tokamaks and for fusion reactors. In the preliminary design trial for the ITER equatorial antenna, the concaved mirror of 0.3m in length having 1m curvature and stroke of 0.2m enables beam angle range of 2040 with beam radius of 0.06m at the EC resonance.

S. Moriyama; M. Seki; T. Fujii

2007-01-01T23:59:59.000Z

452

Optimization and Evolution of Light Harvesting in Photosynthesis: The Role of Antenna Chlorophyll Conserved between Photosystem II and Photosystem I  

Science Journals Connector (OSTI)

...Catharines, Ontario, L2S 3A1, Canada The author responsible for distribution...antenna to absorb and direct solar energy to photochemical reaction...Engineering Research Council of Canada. Barber, J., and Andersson...Catharines, Ontario, L2S 3A1, Canada. svassili@brocku.ca | Journal...

Sergej Vasil'ev; Doug Bruce

2004-10-14T23:59:59.000Z

453

Implications of mining practices in an open-pit gold mine for monitoring of a comprehensive test-ban treaty  

SciTech Connect

This report summarizes the results of an experiment at the Gold Quarry pit, operated by the Newmont Gold Company at Carlin, NV The purpose of the experiment was to obtain local and regional seismic data, together with ``ground truth``, from conventional surface blasting activity and to use these data to help determine the effectiveness with which conventional mining blasts can be discriminated from underground nuclear explosions.

Jarpe, S.P.; Moran, B.; Goldstein, P.; Glenn, L.A.

1996-01-01T23:59:59.000Z

454

Room temperature reaction of oxygen with gold: an in situ ambient-pressure X-ray photoelectron spectroscopy investigation  

SciTech Connect

Gold is commonly regarded as the most inert element.1 However, the discovery of the exceptional catalytic properties of gold nanoparticles (NPs) for low temperature CO oxidation2 initiated great interest due to its promising applications and spawned a large number of studies devoted to the understanding of the reaction mechanism.3-6 Nevertheless, no consistent and conclusive picture has arisen.7-13

Jiang, Peng; Porsgaard, Soeren; Borondics, Ferenc; Kober, Mariana; Caballero, Alfonso; Bluhm, Hendrik; Besenbacher, Flemming; Salmeron, Miquel

2010-02-01T23:59:59.000Z

455

Department of Energy - Gold Award Press Release 9/10/2003  

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

Francis Collins and Ari Patrinos Receive Energy Secretary's Francis Collins and Ari Patrinos Receive Energy Secretary's Gold Award for Human Genome Project Leadership September 10, 2003 WASHINGTON, DC -- Secretary of Energy Spencer Abraham today presented Francis Collins and Aristides Patrinos with the Secretary's Gold Award for their leadership of the government's Human Genome Project. Francis Collins is the director of the National Human Genome Research Institute at the National Institutes of Health, Department of Health and Human Services. Ari Patrinos heads the Office of Biological and Environmental Research at the Department of Energy's (DOE) Office of Science. The award is the Energy Department's highest honorary award and includes a plaque with citation, a medallion and a rosette. Secretary Abraham presented Drs. Collins and Patrinos with the award in a ceremony at DOE headquarters. Director of the National Institutes of Health Elias Zerhouni represented the Department of Health and Human Services at the ceremony.

456

Microsoft Word - CX-Rogue-GoldBeach-DisconnectSwitch-FY13_WEB.docx  

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

8, 2013 8, 2013 REPLY TO ATTN OF: KEPR-4 SUBJECT: Environmental Clearance Memorandum Gregory L Vassallo Electical Engineer - TPCV-ALVEY Proposed Action: Rogue-Gold Beach No. 2 disconnect switch replacement Pollution Prevention and Abatement Project No.: 2411 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B4.6 Additions and modifications to transmission facilities Location: Curry County, Oregon Proposed by: Bonneville Power Administration (BPA) Description of the Proposed Action: BPA and Coos-Curry Electric Cooperative, Inc. (Coos- Curry) have developed a joint plan to replace the existing B-1734 115-kilovolt, group-operated disconnect switch located at BPA's Gold Beach Substation with a new horizontally-mounted,

457

Experimental observation of silver and gold penetration into dental ceramic by means of a radiotracer technique  

SciTech Connect

A radiotracer technique was used to study silver and gold diffusion into dental porcelain under experimental conditions close to the real conditions in prosthetic laboratories for porcelain bakes. It was clearly shown that these non-oxidizable elements were able to diffuse into the ceramic as well as oxidizable ones. The penetration depth varied widely according to the element. The ratio DAg/DAu was about 10(3) around 850 degrees C. In contrast to gold, the silver diffusion rate was high enough to allow silver, from the metallic alloy, to be present at the external ceramic surface after diffusion into the ceramic. Hence, the greening of dental porcelains baked on silver-rich alloys could be explained mainly by a solid-state diffusion mechanism.

Moya, F.; Payan, J.; Bernardini, J.; Moya, E.G.

1987-12-01T23:59:59.000Z

458

Fabrication of atomic-scale gold junctions by electrochemical plating using a common medical liquid  

Science Journals Connector (OSTI)

Fabrication of nanometer-separated gold junctions has been performed using iodine tincture a medical liquid known as a disinfectant as an etching/deposition electrolyte. In the gold-dissolved iodine tincture goldelectrodes were grown or eroded slowly enough to form quantum point contacts in an atomic scale. The resistance evolution during the electrochemicaldeposition showed plateaus at integer multiples of the resistance quantum ( 2 e 2 ? h ) ? 1 at room temperature ( e : the elementary charge h : the Planck constant). Iodine tincture is a commercially available common material which makes the fabrication process to be simple and cost effective. Moreover in contrast to the conventional electrochemical approaches this method is free from highly toxic cyanide compounds or extraordinarily strong acids.

A. Umeno; K. Hirakawa

2005-01-01T23:59:59.000Z

459

Synthesis and characterisation of new designed protoporphyrin-stabilised gold nanoparticles for cancer cells nanotechnology-based targeting  

Science Journals Connector (OSTI)

Nanotechnology has entered the field of medicine in recent dacades and especially, in drug delivery systems, nanoparticles have shown an ability to improve pharmacokinetics, pharmacodynamics, efficacy and to reduce the toxicity of associated drugs. In this study, we have designed a new protoporphyrin-conjugated gold nanoparticle to selectively target and photo- or sonodynamic therapy of tumoural cells. In order to improve the cell uptake effect of protoporphyrin and their derivatives, gold nanoparticle was chosen as carrier. For this purpose, we used 6-mercapto-1-hexanol, as a bifunctional linker to react with protoporphyrin with an ester-linkage formation. Then, we conjugated the thiol-terminated protoporphyrin to the gold nanoparticles through a fast and single-phase system reaction with HAuCl4 in the presence of sodium borohydride. Finally, we evaluated the specific interaction between the protoporphyrin and gold nanoparticles by the elemental analysis, atomic absorption and UV-vis spectrum. Transmission electron microscopic images reveal the spherical gold nanoparticles formation with the average size about 7 nm. Therefore, we have synthesised gold nanoparticle conjugates with protoporphyrin which could be used as a biocompatible drug delivery system.

Hossein Eshghi; Neda Attaran; Ameneh Sazgarnia; Narges Mirzaie; Ahmad Shanei

2011-01-01T23:59:59.000Z

460

A review of "Full of Soup and Gold: The Life of Henry Jermyn" by Anthony Adolph  

E-Print Network (OSTI)

of considering the significance of the sites of production and the modes of transmission as part of understanding the poetics of the text and the dynamics of the period. Anthony Adolph. Full of Soup and Gold: The Life of Henry Jermyn. London: Anthony Adolph... the vilified view of Jermyn with a substantial body of new facts and infer- ences which enable him to convincingly reconfigure (indeed, radically reconfigure) his subject?s character and achievements. Adolph presents Jermyn as a capable, energetic...

Maureen E. Mulvihill

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Effective potentials between gold nano crystals -- functional dependence on the temperature  

E-Print Network (OSTI)

A method is presented that allows to combine the effective potential between two nano crystals, the potential of mean force (PMF), as obtained from all-atomistic Molecular Dynamics simulations with perturbation theory. In this way, a functional dependence of the PMF on temperature is derived, that enables the prediction of the PMF in a wide temperature range. We applied the method for systems of capped gold nano crystals of different size. They show very good agreement with data from atomistic simulations.

G. Bauer; A. Lange; N. Gribova; C. Holm; J. Gro

2014-03-24T23:59:59.000Z

462

Observations of x-ray radiation pressure force on individual gold nanocrystals  

SciTech Connect

We report observations of x-ray radiation pressure force on individual single nanocrystals using an x-ray single molecular methodology. The observed gold nanocrystals are linked to the adsorbed protein molecules. We observed the directed Brownian motion of individual linked nanocrystals. The observed force is estimated at about 0.13-0.63 aN. We will be able to control and measure dynamics of micro- or nanocrystalline materials using x-ray radiation pressure force.

Sasaki, Yuji C.; Okumura, Yasuaki; Miyazaki, Takuya; Higurashi, Takashi; Oishi, Noboru [Synchrotron Radiation Research Institute (JASRI), SPring-8, Sayou, Hyogo 679-5198, Japan and CREST Sasaki-team, Japan Science and Technology Corporation (JST), Tachikawa 190-0012 (Japan); Biotechnology Research Center, Teikyo University, Miyamae, Kawasaki 216-0001, Japan and CREST Sasaki-team, Japan Science and Technology Corporation (JST), Tachikawa 190-0012 (Japan)

2006-07-31T23:59:59.000Z

463

Solar Companies Go for the Gold with SunShot Incubator | Department of  

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

Solar Companies Go for the Gold with SunShot Incubator Solar Companies Go for the Gold with SunShot Incubator Solar Companies Go for the Gold with SunShot Incubator July 26, 2012 - 9:45am Addthis William Parish from Solar Mosaic, one of nine solar startups chosen for the latest round of SunShot Incubator funding, discusses his company’s project with Energy Secretary Steven Chu at the SunShot Grand Challenge Summit in Denver, Colorado. | Photo by John De La Rosa. William Parish from Solar Mosaic, one of nine solar startups chosen for the latest round of SunShot Incubator funding, discusses his company's project with Energy Secretary Steven Chu at the SunShot Grand Challenge Summit in Denver, Colorado. | Photo by John De La Rosa. Minh Le Minh Le Program Manager, Solar Program What does this project do? The sixth iteration of the SunShot Incubator program will support

464

Go for the Gold and Save Energy at Home | Department of Energy  

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

Go for the Gold and Save Energy at Home Go for the Gold and Save Energy at Home Go for the Gold and Save Energy at Home August 15, 2012 - 4:53pm Addthis Amanda McAlpin The Olympic games just drew to a close; it's been an exciting time to be a citizen of the world. Watching them is always inspiring and energizing to me. It's motivation to go to the gym, learn something new, or revisit my own goals. Saving energy has always been an important goal for me, but it can be easy to lose be less mindful of it as I go about my daily life. Why not use this time to set some new energy goals for yourself, or to revisit the some old habits. Remind yourself of the little things you do every day to save energy, the habits that might have gotten a little lax with time. Do you still turn off the lights when you leave a room? Do you unplug appliances and power

465

Synthesis and self-assembly of lipid (DMPC)-conjugated gold nanoparticles  

E-Print Network (OSTI)

Bio-conjugated nanomaterials play a promising role in the development of novel supramolecular structures, molecular machines, and biosensing devices. In this study, lipid-conjugated gold nanoparticles were synthesized and allowed to form a self-assembled monolayer structure. The nanoparticles were prepared by a phase transfer method, which involved the reduction of potassium tetrachloroaurate (III) by sodium citrate in an aqueous solution and the simultaneous transfer of the reduced species to an organic medium containing DMPC (1,2-dimyristoyl-sn-glycero-3-phosphocholine). The gold nanoparticles were characterized using UV-Vis spectroscopy and dynamic light scattering (DLS) particle-size analysis. In addition, the resulting nanoparticles were examined using transmission electron microscopy (TEM). The Langmuir-Blodgett (LB) technique was used to assemble the DMPC-capped nanoparticles onto a water subphase at room temperature. The measurement of the compression isotherm confirmed the assemblage of lipid capped gold nanoparticles. This method of synthesis of ordered structures utilizing molecular interactions of lipids will be useful in developing novel metamaterials and nanocircuits.

Subhasish Chatterjee; Markrete Krikorian; Harry D. Gafney; Bonnie Gersten

2012-07-15T23:59:59.000Z

466

Enhancing DNA binding rate using optical trapping of high-density gold nanodisks  

SciTech Connect

We present the dynamic study of optical trapping of fluorescent molecules using high-density gold nanodisk arrays. The gold nanodisks were fabricated by electron beam lithography with a diameter of 500 nm and a period of 1 ?m. Dark-field illumination showed ?15 times enhancement of fluorescence near edges of nanodisks. Such enhanced near-field generated an optical trapping force of ?10 fN under 3.58 10{sup 3} W/m{sup 2} illumination intensity as calculated from the Brownian motions of 590 nm polystyrene beads. Kinetic observation of thiolated DNA modified with Cy5 dye showed different binding rates of DNA under different illumination intensity. The binding rate increased from 2.14 10{sup 3} s{sup ?1} (I = 0.7 10{sup 3} W/m{sup 2}) to 1.15 10{sup 5} s{sup ?1} (I = 3.58 10{sup 3} W/m{sup 2}). Both enhanced fluorescence and binding rate indicate that gold nanodisks efficiently improve both detection limit and interaction time for microarrays.

Lin, En-Hung; Pan, Ming-Yang [Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan 30013 (China) [Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan 30013 (China); Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan 11529 (China); Lee, Ming-Chang [Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan 30013 (China)] [Institute of Photonics Technologies, National Tsing Hua University, Hsinchu, Taiwan 30013 (China); Wei, Pei-Kuen, E-mail: pkwei@sinica.edu.tw [Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan 11529 (China) [Research Center for Applied Sciences, Academia Sinica, Taipei, Taiwan 11529 (China); Institute of Biophotonics, National Yang-Ming University, Taipei 11221, Taiwan (China)

2014-03-15T23:59:59.000Z

467

Comparison of the Legacy and Gold SnIa Dataset Constraints on Dark Energy Models  

E-Print Network (OSTI)

We have performed a comparative analysis of three recent and reliable SnIa datasets available in the literature: the Full Gold (FG) dataset (157 data points $0dataset (140 data points $0dataset (115 data points $0datasets are consistent with each other at the 95% confidence level, the latest (SNLS) dataset shows distinct trends which are not shared by the Gold datasets. We find that the best fit dynamical $w(z)$ obtained from the SNLS dataset does not cross the PDL $w=-1$ and remains above and close to the $w=-1$ line for the whole redshift range $0datasets (FG and TG) clearly crosses the PDL and departs significantly from the PDL $w=-1$ line while the LCDM parameter values are about $2\\sigma$ away from the best fit $w(z)$. In addition, the $(\\Omega_{0m},\\Omega_\\Lambda)$ parameters in a LCDM parametrization without a flat prior, fit by the SNLS dataset, favor the minimal flat LCDM concordance model. The corresponding fit with the Gold datasets mildly favors a closed universe and the flat LCDM parameter values are $1\\sigma - 2\\sigma$ away from the best fit $(\\Omega_{0m},\\Omega_\\Lambda)$.

S. Nesseris; L. Perivolaropoulos

2005-12-02T23:59:59.000Z

468

Controlled epitaxial growth of mesoporous silica/gold nanorod nanolollipops and nanodumb-bells  

SciTech Connect

In this work, we describe the controlled synthesis of novel heterogeneous nanostructures comprised of mesoporous silica-coated gold nanorods (MSGNRs) in the form of coreshell nanolollipops and nanodumb-bells, using a seed-mediated solgel method. Although MSGNR coreshell (?-MSGNR) structures have been reported previously by us and others, we herein discuss the first ever fabrication of MSGNR nanolollipops (?-MSGNR) and nanodumb-bells (?-MSGNR), achieved by simply controlling the aging time of gold nanorods (GNRs), the residual cetyltrimethylammonium bromide (CTAB) coating of GNRs, and the addition of dimethyl formamide during incubation, centrifugation, and sonication, respectively. Transmission electron microscopy revealed two bare GNR isoforms, with aspect ratios of approximately 4 and 6, while scanning electron microscopy was used to further elucidate the morphology of ?-MSGNR and ?-MSGNR heterostructures. In agreement with the smaller dielectric constants afforded by incomplete silica encasement, spectroscopic studies of ?-MSGNR and ?-MSGNR, surface plasmon resonance (SPR) bands revealed 20-40 nm blue shifts relative to the SPR of ?-MSGNR. On the basis of the attributes and applications of more conventional ?-MSGNRs, ?-MSGNRs and ?-MSGNRs are anticipated to provide most of the utility of ?-MSGNRs, but with the additional functionalities that accompany their incorporation of both bare gold and mesoporous silica encased tips; with significant/unique implications for biomedical and catalytic applications.

Huang, Ching-Mao [Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan Town, Miaoli 35053, Taiwan (China); Material and Chemical Laboratories, Industrial Technology Research Institute, Hsinchu 30011, Taiwan (China); Chung, Ming-Fang; Lo, Leu-Wei, E-mail: lwlo@nhri.org.tw [Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan Town, Miaoli 35053, Taiwan (China); Souris, Jeffrey S. [Department of Radiology, The University of Chicago, Chicago, Illinois 60637 (United States)

2014-11-01T23:59:59.000Z

469

Solar Companies Go for the Gold with SunShot Incubator | Department of  

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

Solar Companies Go for the Gold with SunShot Incubator Solar Companies Go for the Gold with SunShot Incubator Solar Companies Go for the Gold with SunShot Incubator July 26, 2012 - 9:45am Addthis William Parish from Solar Mosaic, one of nine solar startups chosen for the latest round of SunShot Incubator funding, discusses his company’s project with Energy Secretary Steven Chu at the SunShot Grand Challenge Summit in Denver, Colorado. | Photo by John De La Rosa. William Parish from Solar Mosaic, one of nine solar startups chosen for the latest round of SunShot Incubator funding, discusses his company's project with Energy Secretary Steven Chu at the SunShot Grand Challenge Summit in Denver, Colorado. | Photo by John De La Rosa. Minh Le Minh Le Program Manager, Solar Program What does this project do? The sixth iteration of the SunShot Incubator program will support

470

ANTENNA RADIATION NEAR THE LOCAL PLASMA FREQUENCY BY LANGMUIR WAVE EIGENMODES  

SciTech Connect

Langmuir waves (LWs) in the solar wind are generated by electron beams associated with solar flares, interplanetary shock fronts, planetary bow shocks, and magnetic holes. In principle, LWs localized as eigenmodes of density fluctuations can emit electromagnetic (EM) radiation by an antenna mechanism near the local plasma frequency f{sub p} and twice the local plasma frequency. In this work, analytic expressions are derived for the radiated electric and magnetic fields and power generated near f{sub p} by LW eigenmodes. The EM wave power emitted near f{sub p} is predicted as a function of the eigenmode length scale L, maximum electric field, driving electron beam speed, and the ambient plasma density and temperature. The escape to a distant observer of f{sub p} radiation from a localized Langmuir eigenmode is also briefly explored as a function of the plasma conditions.

Malaspina, David M. [Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303 (United States); Cairns, Iver H. [School of Physics, University of Sydney, New South Wales 2006 (Australia); Ergun, Robert E., E-mail: David.Malaspina@lasp.colorado.edu, E-mail: cairns@physics.usyd.edu.au, E-mail: ree@lasp.colorado.edu [Laboratory for Atmospheric and Space Physics, Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80303 (United States)

2012-08-10T23:59:59.000Z

471

Transmissive infrared frequency selective surfaces and infrared antennas : final report for LDRD 105749.  

SciTech Connect

Plasmonic structures open up new opportunities in photonic devices, sometimes offering an alternate method to perform a function and sometimes offering capabilities not possible with standard optics. In this LDRD we successfully demonstrated metal coatings on optical surfaces that do not adversely affect the transmission of those surfaces at the design frequency. This technology could be applied as an RF noise blocking layer across an optical aperture or as a method to apply an electric field to an active electro-optic device without affecting optical performance. We also demonstrated thin optical absorbers using similar patterned surfaces. These infrared optical antennas show promise as a method to improve performance in mercury cadmium telluride detectors. Furthermore, these structures could be coupled with other components to lead to direct rectification of infrared radiation. This possibility leads to a new method for infrared detection and energy harvesting of infrared radiation.

Wendt, Joel Robert; Hadley, G. Ronald; Samora, Sally; Loui, Hung; Cruz-Cabrera, Alvaro Augusto; Davids, Paul; Kemme, Shanalyn A.; Basilio, Lorena I.; Johnson, William Arthur; Peters, David William

2009-09-01T23:59:59.000Z

472

Design and performance of a terahertz photoconductive antenna with nano-crossfinger structure  

E-Print Network (OSTI)

Improving terahertz(THz) radiation power and/or optics-to-THz efficiency of the photoconductive antenna(PCA) is widely recognized as one of the most attractive and challenging missions in THz community. In this work, the design of a THz PCA with nano-crossfinger structure in the active region is proposed. The THz radiation properties of this PCA was demonstrated by finite-difference-time-domain method based on full-wave model. As a comparison, the PCA with nano-finger structure that promises enhanced THz radiation than conventional PCA was also analyzed numerically. The results indicate that the nano-crossfinger PCA can radiate even higher THz field than the nano-finger PCA, primarily due to the enhanced bias field within the nano-structure.

Zhang, Jitao

2014-01-01T23:59:59.000Z

473

Deep Near-Infrared Imaging and Photometry of the Antennae Galaxies with WIRC  

E-Print Network (OSTI)

We present deep near-infrared images of the Antennae galaxies, taken with the Palomar Wide-Field Infrared Camera WIRC. The images cover a 4.33' x 4.33' (24.7kpc x 24.7kpc) area around the galaxy interaction zone. We derive J and K_s band photometric fluxes for 172 infrared star clusters, and discuss details of the two galactic nuclei and the overlap region. We also discuss the properties of a subset of 27 sources which have been detected with WIRC, HST and the VLA. The sources in common are young clusters of less than 10 Myr, which show no correlation between their infrared colors and 6 cm radio properties. These clusters cover a wide range in infrared color due to extinction and evolution. The average extinction is about A_V~2 mag while the reddest clusters may be reddened by up to 10 magnitudes.

B. R. Brandl; D. M. Clark; S. S. Eikenberry; J. C. Wilson; C. P. Henderson; D. J. Barry; J. R. Houck; J. C. Carson; T. L. Hayward

2005-09-06T23:59:59.000Z

474

Observation of EHO in NSTX and Theoretical Study of its Active Control Using HHFW Antenna  

SciTech Connect

Two important topics in the tokamak ELM control, using the non-axisymmetric (3D) magnetic perturbations, are studied in NSTX and combined envisioning ELM control in the future NSTX-U operation: Experimental observations of the edge harmonic oscillation in NSTX (not necessarily the same as EHOs in DIII-D), and theoretical study of its external drive using the high harmonic fast wave (HHFW) antenna as a 3D field coil. Edge harmonic oscillations were observed particularly well in NSTX ELM-free operation with low n core modes, with various diagnostics confirming n = 4 ~#24; 6 edge-localized and coherent oscillations in 2 ~#24; 8kHz frequency range. These oscillations seem to have a favored operational window in rotational shear, similarly to EHOs in DIII-D QH modes . However, in NSTX, they are not observed to provide particle or impurity control, possibly due to their weak amplitudes, of a few mm displacements, as measured by reflectometry. The external drive of these modes has been proposed in NSTX, by utilizing audio-frequency currents in the HHFW antenna straps. Analysis shows that the HHFW straps can be optimized to maximize n = 4 ~#24; 6 while minimizing n = 1 ~#24; 3. Also, IPEC calculations show that the optimized configuration with only 1kAt current can produce comparable or larger displacements than the observed internal modes. If this optimized external drive can be constructively combined, or further resonated with the internal modes, the edge harmonic oscillations in NSTX may be able to produce sufficient particle control to modify ELMs.

J.-K. Park, et. al.

2013-01-14T23:59:59.000Z

475

Impact of static magnetic fields on the radial line slot antenna plasma source  

SciTech Connect

The radial line slot antenna plasma source is used in semiconductor device fabrication. As is the case for all plasma sources, ever more strict uniformity control requirements are driven by the precision demands of new device technologies. Large volume diffusion plasmas, of which the radial line slot antenna source is one type, must overcome transport effects or diffusion modes that tend to 'center peak' the plasma density near the wafer being processed. One way to resolve problematic transport effects is the insertion of magnetic fields into the plasma region. In this paper, the impact of the magnetic field on plasma properties is parameterized as a function of slot configuration. The magnetic field orientation and the magnitude of magnetic field are varied in a computational study in which the source is modeled as a two-dimensional axisymmetric quasineutral plasma. This work employs a finite element model simulation. The magnitude of magnetic fields considered is 50 Gauss maximum with a microwave power of 3000 W at a pressure of 20 mTorr. 20 mTorr is chosen as this is a condition where diffusion effects are challenging to counteract. The study showed that there are specific conditions for slot configuration and magnetic field that improve the plasma controllability and some that do not. Plasma property modulation is most effective when the plasma source region is placed at large radius with axial magnetic fields. There are synergistic effects between the slot location and magnetic field that are important and placing large magnetic fields at the chamber edge alone does not result in improved uniformity. Electron cyclotron resonance (ECR) heating and the impact of pulsing the magnetic fields are presented. ECR heating is not important for the conditions relevant to this paper and pulsing is shown to have benefit.

Yoshikawa, Jun; Ventzek, Peter L. G. [Tokyo Electron Ltd. Akasaka Biz Tower, 3-1 Akasaka 5-chome, Minato-ku, Tokyo 107-6325 (Japan)

2013-05-15T23:59:59.000Z

476

An outgoing energy flux boundary condition for finite difference ICRP antenna models  

SciTech Connect

For antennas at the ion cyclotron range of frequencies (ICRF) modeling in vacuum can now be carried out to a high level of detail such that shaping of the current straps, isolating septa, and discrete Faraday shield structures can be included. An efficient approach would be to solve for the fields in the vacuum region near the antenna in three dimensions by finite methods and to match this solution at the plasma-vacuum interface to a solution obtained in the plasma region in one dimension by Fourier methods. This approach has been difficult to carry out because boundary conditions must be imposed at the edge of the finite difference grid on a point-by-point basis, whereas the condition for outgoing energy flux into the plasma is known only in terms of the Fourier transform of the plasma fields. A technique is presented by which a boundary condition can be imposed on the computational grid of a three-dimensional finite difference, or finite element, code by constraining the discrete Fourier transform of the fields at the boundary points to satisfy an outgoing energy flux condition appropriate for the plasma. The boundary condition at a specific grid point appears as a coupling to other grid points on the boundary, with weighting determined by a kemel calctdated from the plasma surface impedance matrix for the various plasma Fourier modes. This boundary condition has been implemented in a finite difference solution of a simple problem in two dimensions, which can also be solved directly by Fourier transformation. Results are presented, and it is shown that the proposed boundary condition does enforce outgoing energy flux and yields the same solution as is obtained by Fourier methods.

Batchelor, D.B.; Carter, M.D.

1992-11-01T23:59:59.000Z

477

Integration of a 15-Element, VHF Bow-Tie Antenna Array into an Aerodynamic Fairing on a NASA P-3 Aircraft  

E-Print Network (OSTI)

Radar depth sounding and imaging of deep glaciers in Antarctica and Greenland yield results for better understanding a changing climate and improving glacier modeling. A 15-element, airborne antenna array with an increased ...

Byers, Kyle J.

2011-06-16T23:59:59.000Z

478

Reconstruction of flaw images by the C-SAFT method from echo signals measured by an antenna array in the triple-scanning mode  

Science Journals Connector (OSTI)

The application of antenna matrices (AMs) for obtaining flaw images during automated nondestructive ultrasonic testing is considered. The conventional technique of using an AM as a phased AM (PAM) has a number...

E. G. Bazulin

2012-01-01T23:59:59.000Z

479

Lactose oxidation kinetics with oxygen in catalyst-solution-gas three-phase system with simultaneous electrical potential measurement of supported gold catalyst  

Science Journals Connector (OSTI)

Lactose oxidation kinetics was studied on an supported gold catalyst with simultaneous control of catalyst potential. The experimental data were described well...

D. Yu. Murzin; E. V. Murzina; A. V. Tokarev

2009-09-01T23:59:59.000Z

480

Direct, spectroscopic measurement of electric fields in a plasma-RF antenna interaction region in Tore Supra  

SciTech Connect

Balmer-series spectral line profiles of deuterium emission near a lower-hybrid (3.7 GHz) wave, high power (1-4 MW) launcher were measured with high-spectral resolution in the Tore Supra tokamak and fitted to an atomic physics model which includes both Zeeman and dynamic Stark effects. The magnetic field is static and the electric field is assumed to be monochromatic at 3.7 GHz. The determined strength and direction of the high-frequency electric field is found to be in good agreement with the results of a simulation that computes the propagation of these lower hybrid waves into the plasma in the region around the launch antenna and specifically in the region of estimated peak emission contributing to the measurement. This agreement indicates feasibility for the use of dynamic Stark effect spectroscopy to study interaction at the plasma antenna interactions in a fusion plasma environment. (C) 2013 Elsevier B. V. All rights reserved.

Klepper, C Christopher [ORNL] [ORNL; Hillis, Donald Lee [ORNL] [ORNL; Isler, Ralph C [ORNL] [ORNL; Hillairet, J. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Martin, E. H. [North Carolina State University] [North Carolina State University; Colas, L. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Ekedahl, A. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Goniche, M. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Lotte, Ph. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Colledani, G. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Martin, V. [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Panayotis, Stephanie [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM)] [French Atomic Energy Commission (CEA), Institute for Magnetic Fusion Research (IRFM); Pegourie, B. [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance] [French Atomic Energy Commission (CEA), Cadarache, St. Paul lez Durance; Harris, Jeffrey H [ORNL] [ORNL

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "v-shaped gold antennas" 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

Heat capacity of quantum adsorbates: Hydrogen and helium on evaporated gold films  

SciTech Connect

The author has constructed an apparatus to make specific heat measurements of quantum gases adsorbed on metallic films at temperatures between 0.3 and 4 K. He has used this apparatus to study quench-condensed hydrogen films between 4 and 923 layers thick with J = 1 concentrations between 0.28 and 0.75 deposited on an evaporated gold surface. He has observed that the orientational ordering of the J = 1 molecules depends on the substrate temperature during deposition of the hydrogen film. He has inferred that the density of the films condensed at the lowest temperatures is 25% higher than in bulk H{sub 2} crystals and have observed that the structure of those films is affected by annealing at 3.4 K. The author has measured the J = 1 to J = 0 conversion rate to be comparable to that of the bulk for thick films; however, he found evidence that the gold surface catalyzes conversion in the first two to four layers. He has also used this apparatus to study films of {sup 4}He less than one layer thick adsorbed on an evaporated gold surface. He shows that the phase diagram of the system is similar to that for {sup 4}He/graphite although not as rich in structure, and the phase boundaries occur at different coverages and temperatures. At coverages below about half a layer and at sufficiently high temperatures, the {sup 4}He behaves like a two-dimensional noninteracting Bose gas. At lower temperatures and higher coverages, liquidlike and solidlike behavior is observed. The Appendix shows measurements of the far-infrared absorptivity of the high-{Tc} superconductor La{sub 1.87}Sr{sub 0.13}CuO{sub 4}.

Birmingham, J.T. [Univ. of California, Berkeley, CA (United States). Dept. of Physics]|[Lawrence Berkeley National Lab., CA (United States). Materials Sciences Div.

1996-06-01T23:59:59.000Z

482

Development of gold nanoparticle-sheathed glass capillary nanoelectrodes for sensitive detection of cerebral dopamine  

Science Journals Connector (OSTI)

Abstract To develop in vivo monitoring strategies of neurotransmitters involved in brain chemistry is a challenging work for progress in understanding the roles that biomolecules play in pathology and physiology. Here we report a new type of gold nanoparticle-sheathed glass capillary nanoelectrode (Au/GCNE) for sensing cerebral dopamine. First, a size-controlled needle-type quartz capillary was pulled with a laser puller. Then, the capillary tip exterior was chemically functionalized with colloidal gold nanoparticles by the seed-mediated growth protocol. Through insulating the above tip with cathodic electrophoretic paint followed by heating to tune the exposed area of gold-nanoparticle-film, the Au/GCNE with tip apex radius ranging from ~8.9 to ~500nm can be prepared. Scanning electron microscopy (SEM) and steady-state voltammetry were utilized to characterize the effective radius of nanoelectrodes. The results showed that the tip apex radius of Au/GCNE was mainly affected by the pre-pulled capillary tip, the modified AuNPs and the cathodic electrophoretic paint. By taking advantage of the modified AuNPs and the enhanced electrochemical performance of the nanoelectrode, a wide dynamic linear range from 2.010?8M to 5.610?6M with a low detection limit of 1.010?8M (S/N=3), as well as good selectivity for dopamine, were first achieved with the Nafion-modified Au/GCNE. In addition, the designed glass substrates of Au/GCNE were mechanically stronger and their sharp tips aided in membrane penetration during implantation in the in vivo experiment. As a result, the Nafion-modified Au/GCNE was successfully applied for amperometrically monitoring dopamine in the striatum of anesthetic rats.

Yingzi Liu; Qianqian Yao; Xiaomeng Zhang; Meina Li; Anwei Zhu; Guoyue Shi

2015-01-01T23:59:59.000Z

483

Developing depleted uranium and gold cocktail hohlraums for the National Ignition Facility  

SciTech Connect

Fusion ignition experiments are planned to begin at the National Ignition Facility (NIF) [J. A. Paisner, E. M. Campbell, and W. J. Hogan, Fusion Technol. 26, 755 (1994)] using the indirect drive configuration [J. D. Lindl, P. Amendt, R. L. Berger, S. G. Glendinning, S. H. Glenzer, S. W. Haan, R. L, Kauffman, O. L. Landen, and L. J. Suter, Phys. Plasmas 11, 339 (2004)]. Although the x-ray drive in this configuration is highly symmetric, energy is lost in the conversion process due to x-ray penetration into the hohlraum wall. To mitigate this loss, depleted uranium is incorporated into the traditional gold hohlraum to increase the efficiency of the laser to x-ray energy conversion by making the wall more opaque to the x rays [H. Nishumura, T. Endo, H. Shiraga, U. Kato, and S. Nakai, Appl. Phys. Lett. 62, 1344 (1993)]. Multilayered depleted uranium (DU) and gold hohlraums are deposited by sputtering by alternately rotating a hohlraum mold in front of separate DU and Au sources to build up multilayers to the desired wall thickness. This mold is removed to leave a freestanding hohlraum half; two halves are used to assemble the complete NIF hohlraum to the design specifications. In practice, exposed DU oxidizes in air and other chemicals necessary to hohlraum production, so research has focused on developing a fabrication process that protects the U from damaging environments. This paper reports on the most current depleted uranium and gold cocktail hohlraum fabrication techniques, including characterization by Auger electron spectroscopy, which is used to verify sample composition and the amount of oxygen uptake over time.

Wilkens, H. L.; Nikroo, A.; Wall, D. R.; Wall, J. R. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)

2007-05-15T23:59:59.000Z

484

Size Dependence of Atomically Precise Gold Nanoclusters in Chemoselective Hydrogenation and Active Site Structure  

SciTech Connect

We here investigate the catalytic properties of water-soluble Aun(SG)m nanocluster catalysts (H-SG = glutathione) of different sizes, including Au15(SG)13, Au18(SG)14, Au25(SG)18, Au38(SG)24, and captopril-capped Au25(Capt)18 nanoclusters. These Aun(SR)m nanoclusters (-SR represents thiolate generally) are used as homogeneous catalysts (i.e., without supports) in the chemoselective hydrogenation of 4-nitrobenzaldehyde (4-NO2PhCHO) to 4-nitrobenzyl alcohol (4-NO2PhCH2OH) in water with H2 gas (20 bar) as the hydrogen source. These nanocluster catalysts, except Au18(SG)14, remain intact after the catalytic reaction, evidenced by UV-vis spectra which are characteristic of each sized nanoclusters and thus serve as spectroscopic fingerprints . We observe a drastic size-dependence and steric effect of protecting ligands on the gold nanocluster catalysts in the hydrogenation reaction. Density functional theory (DFT) modeling of the 4-nitrobenzaldehyde adsorption shows that both the CHO and NO2 groups are in close interact with the S-Au-S staples on the gold nanocluster surface; the adsorption of the 4-nitrobenzaldehyde molecule on the four different sized Aun(SR)m nanoclusters are moderately strong and similar in strength. The DFT results suggest that the catalytic activity of the Aun(SR)m nanoclusters is primarily determined by the surface area of the Au nanocluster, consistent with the observed trend of the conversion of 4-nitrobenzaldehyde versus the cluster size. Overall, this work offers the molecular insight into the hydrogenation of 4-nitrobenzaldehyde and the catalytically active site structure on gold nanocluster catalysts.

Li, Gao [Carnegie Mellon University (CMU); Jiang, Deen [ORNL; Kumar, Santosh [Carnegie Mellon University (CMU); Chen, Yuxiang [Carnegie Mellon University (CMU); Jin, Rongchao [Carnegie Mellon University (CMU)

2014-01-01T23:59:59.000Z

485

Chlorophyll antenna size adjustments by irradiance in Dunaliella salina involve coordinate regulation of chlorophyll a oxygenase (CAO)  

E-Print Network (OSTI)

amounts of Chl b, have a large Chl a-b light-harvesting complex (LHC) and a high LHC to PS-core ratio of Chl b, have a small LHC antenna and a low LHC to PS-core ratio (Björkman et al., 1972; Leong binding protein and vice versa. Furthermore, Chl b 1 Proceedings of the 2002 U.S. DOE Hydrogen Program

486

Current generation by helicons and lower hybrid waves in modern tokamaks and reactors ITER and DEMO. Scenarios, modeling and antennae  

SciTech Connect

The innovative concept and 3D full-wave code modeling the off-axis current drive by radio-frequency (RF) waves in large-scale tokamaks, ITER and DEMO, for steady-state operation with high efficiency is proposed. The scheme uses the helicon radiation (fast magnetosonic waves at high (20-40) ion cyclotron frequency harmonics) at frequencies of 500-700 MHz propagating in the outer regions of the plasmas with a rotational transform. It is expected that the current generated by helicons, in conjunction with the bootstrap current, ensure the maintenance of a given value of the total current in the stability margin q(0) {>=} 2 and q(a) {>=} 4, and will help to have regimes with a negative magnetic shear and internal transport barrier to ensure stability at high normalized plasma pressure {beta}{sub N} > 3 (the so-called advanced scenarios) of interest for the commercial reactor. Modeling with full-wave three-dimensional codes PSTELION and STELEC showed flexible control of the current profile in the reactor plasmas of ITER and DEMO, using multiple frequencies, the positions of the antennae and toroidal wave slow down. Also presented are the results of simulations of current generation by helicons in the DIII-D, T-15MD, and JT-60AS tokamaks. Commercially available continuous-wave klystrons of the MW/tube range are promising for commercial stationary fusion reactors. The compact antennae of the waveguide type are proposed, and an example of a possible RF system for today's tokamaks is given. The advantages of the scheme (partially tested at lower frequencies in tokamaks) are a significant decline in the role of parametric instabilities in the plasma periphery, the use of electrically strong resonator-waveguide type antennae, and substantially greater antenna-plasma coupling.

Vdovin, V. L., E-mail: vdov@nfi.kiae.ru [National Research Centre 'Kurchatov Institute,' (Russian Federation)

2013-02-15T23:59:59.000Z

487

Parasitic signals in the receiving band of the Sub-Harmonic Arc Detection system on JET ICRF Antennas  

SciTech Connect

When testing the SHAD system on JET ICRF antennas, parasitic signals in the detection band (5-20MHz) were detected. We have identified emission from grid breakdown events in the Neutral Beam injectors, and Ion Cyclotron Emission from the plasma. Spurious signals in the band 4-10 MHz are also often observed at the onset of ELM events. Such parasitic signals could complicate the design and operation of SHAD in ICRF systems for fusion devices.

Jacquet, P.; Blackman, T.; Day, I. E.; Graham, M.; Mayoral, M.-L.; Monakhov, I.; Nightingale, M.; Sharapov, S. E. [EURATOM/CCFE Fusion Association, Culham Science Center, Abingdon, 0X14 3DB (United Kingdom); Berger-By, G. [CEA, IRFM, F-l3108 Saint-Paul-lez Durances (France); Bobkov, V. [Max Planck IPP/EURATOM Assoziation, D-85748 Garching (Germany); Durodie, F.; Vrancken, M. [Association EURATOM/Belgium State, LPP-ERM/KMS, B-1000 Brussels (Belgium); Hellsten, T. [Association EURATOM-VR, Fusion Plasma Physics, EES, KTH, Stockholm (Sweden); Laxaaback, M. [Association EURATOM-VR, Fusion Plasma Physics, EES, KTH, Stockholm (Sweden); EFDA-CSU, Culham Science Centre, Abingdon, 0X14 3DB (United Kingdom)

2011-12-23T23:59:59.000Z

488

On the microstructure of nanoporous gold: an x-ray diffraction study  

SciTech Connect

The evolution of the grain structure, internal stresses, and the lattice misorientations of nanoporous gold (npAu) during dealloying of bulk (3D) Ag-Au alloy samples was studied by various in-situ and ex-situ X-ray diffraction techniques including powder and Laue diffraction. The experiments reveal that the dealloying process preserves the original crystallographic structure, but leads to a small spread in orientations within individual grains. Furthermore, most grains develop in-plane tensile stress. The feature size of the developing nanoporous structure increases with increasing dealloying time.

Van Petegem, S; Brandstetter, S; Maa?, R; Schmitt, B; Borca, C; Van Swygenhoven, H; Hodge, A M; El-Dasher, B S; Biener, J

2008-08-26T23:59:59.000Z

489

The impact of process parameters on gold elimination from soldered connector assemblies  

SciTech Connect

Minimizing the likelihood of solder joint embrittlement in connectors is realized by reducing or eliminating retained Au plating and/or Au-Sn intermetallic compound formation from the assemblies. Gold removal is performed most effectively by using a double wicking process. When only a single wicking procedure can be used, a higher soldering temperature improves the process of Au removal from the connector surfaces and to a nominal extent, removal of Au-contaminated solder from the joint. A longer soldering time did not appear to offer any appreciable improvement toward removing the Au-contaminated solder from the joint. Because the wicking procedure was a manual process, it was operator dependent.

VIANCO,PAUL T.; KILGO,ALICE C.

2000-02-02T23:59:59.000Z

490

Reconstruction of Hessence Dark Energy and the Latest Type Ia Supernovae Gold Dataset  

E-Print Network (OSTI)

Recently, many efforts have been made to build dark energy models whose equation-of-state parameter can cross the so-called phantom divide $w_{de}=-1$. One of them is the so-called hessence dark energy model in which the role of dark energy is played by a non-canonical complex scalar field. In this work, we develop a simple method based on Hubble parameter $H(z)$ to reconstruct the hessence dark energy. As examples, we use two familiar parameterizations for $H(z)$ and fit them to the latest 182 type Ia supernovae Gold dataset. In the reconstruction, measurement errors are fully considered.

Hao Wei; Ningning Tang; Shuang Nan Zhang

2007-02-28T23:59:59.000Z

491

Reconstruction of a Deceleration Parameter from the Latest Type Ia Supernovae Gold Dataset  

E-Print Network (OSTI)

In this paper, a parameterized deceleration parameter $q(z)= 1/2 - a/(1 + z)^b$ is reconstructed from the latest type Ia supernovae gold dataset. It is found out that the transition redshift from decelerated expansion to accelerated expansion is at $z_T=0.35^{+0.14}_{-0.07}$ with $1\\sigma$ confidence level in this parameterized deceleration parameter. And, the best fit values of parameters in $1\\sigma$ errors are $a=1.56^{+0.99}_{-0.55}$ and $b=3.82^{+3.70}_{-2.27}$.

Lixin Xu; Chengwu Zhang; Baorong Chang; Hongya Liu

2007-01-17T23:59:59.000Z

492

SETUP AND PERFORMANCE OF THE RHIC INJECTOR ACCELERATORS FOR THE 2007 RUN WITH GOLD IONS  

SciTech Connect

Gold ions for the 2007 run of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) are accelerated in the Tandem, Booster and AGS prior to injection into RHIC. The setup and performance of this chain of accelerators is reviewed with a focus on improvements in the quality of beam delivered to RHIC. In particular, more uniform stripping foils between Booster and AGS7 and a new bunch merging scheme in AGS have provided beam bunches with reduced longitudinal emittance for RHIC.

GARDNER,C.; AHRENS, L.; ALESSI, J.; BENJAMIN, J.; BLASKIEWICZ, M.; ET AL.

2007-06-25T23:59:59.000Z

493

Design, performance, and grounding aspects of the International Thermonuclear Experimental Reactor ion cyclotron range of frequencies antenna  

SciTech Connect

ITER's Ion Cyclotron Range of Frequencies (ICRF) system [Lamalle et al., Fusion Eng. Des. 88, 517520 (2013)] comprises two antenna launchers designed by CYCLE (a consortium of European associations listed in the author affiliations above) on behalf of ITER Organisation (IO), each inserted as a Port Plug (PP) into one of ITER's Vacuum Vessel (VV) ports. Each launcher is an array of 4 toroidal by 6 poloidal RF current straps specified to couple up to 20?MW in total to the plasma in the frequency range of 40 to 55 MHz but limited to a maximum system voltage of 45?kV and limits on RF electric fields depending on their location and direction with respect to, respectively, the torus vacuum and the toroidal magnetic field. A crucial aspect of coupling ICRF power to plasmas is the knowledge of the plasma density profiles in the Scrape-Off Layer (SOL) and the location of the RF current straps with respect to the SOL. The launcher layout and details were optimized and its performance estimated for a worst case SOL provided by the IO. The paper summarizes the estimated performance obtained within the operational parameter space specified by IO. Aspects of the RF grounding of the whole antenna PP to the VV port and the effect of the voids between the PP and the Blanket Shielding Modules (BSM) surrounding the antenna front are discussed. These blanket modules, whose dimensions are of the order of the ICRF wavelengths, together with the clearance gaps between them will constitute a corrugated structure which will interact with the electromagnetic waves launched by ICRF antennas. The conditions in which the grooves constituted by the clearance gaps between the blanket modules can become resonant are studied. Simple analytical models and numerical simulations show that mushroom type structures (with larger gaps at the back than at the front) can bring down the resonance frequencies, which could lead to large voltages in the gaps between the blanket modules and perturb the RF properties of the antenna if they are in the ICRF operating range. The effect on the wave propagation along the wall structure, which is acting as a spatially periodic (toroidally and poloidally) corrugated structure, and hence constitutes a slow wave structure modifying the wall boundary condition, is examined.

Durodi, F., E-mail: frederic.durodie@rma.ac.be; Dumortier, P.; Vrancken, M.; Messiaen, A.; Huygen, S.; Louche, F.; Van Schoor, M.; Vervier, M. [LPP-ERM/KMS, Association EURATOM-Belgian State, Brussels (Belgium); Bamber, R.; Hancock, D.; Lockley, D.; Nightingale, M. P. S.; Shannon, M.; Tigwell, P.; Wilson, D. [EURATOM/CCFE Assoc., Culham Science Centre, Abingdon OX14 3DB (United Kingdom); Maggiora, R.; Milanesio, D. [Associazione EURATOM-ENEA, Politechnico di Torino (Italy); Winkler, K. [IPP-MPI, EURATOM-Assoziation, Garching (Germany)

2014-06-15T23:59:59.000Z

494

Enhancement of the high-order harmonic generation from the gold plume using the time-resolved plasma spectroscopy  

SciTech Connect

We present systematic time-resolved investigations of plasma conditions for achieving the maximum cutoff and maximum conversion efficiency of high-order harmonic generation from gold plasma within the plateau. We analyzed harmonic generation under different laser-plasma conditions. We also performed simulations to calculate the ionization state of the gold plasma, the free electron density, and singly charged ion density at different prepulse intensities. By optimizing the plasma conditions, we observed a harmonic cutoff at the 53rd order ({lambda}=15.09 nm). We estimate the conversion efficiency of the harmonics within the plateau region to be 2x10{sup -6}.

Ganeev, Rashid A.; Elouga Bom, Luc B.; Ozaki, Tsuneyuki [Institut National de la Recherche Scientifique, Energie, Materiaux et Telecommunications, 1650 Lionel-Boulet, Varennes, Quebec J3X 1S2 (Canada) and Scientific Association Akadempribor, Academy of Sciences of Uzbekistan, Akademgorodok, Tashkent 100125 (Uzbekistan); Institut National de la Recherche Scientifique, Energie, Materiaux et Telecommunications, 1650 Lionel-Boulet, Varennes, Quebec J3X 1S2 (Canada)

2007-10-01T23:59:59.000Z

495

Super-Stable, Highly Monodisperse Plasmonic Nanocrystals with 500 Gold Atoms: Au~500(SR)~120  

SciTech Connect

Determining the composition of plasmonic nanoparticles is challenging due to a deficiency in tools capable of accurately evaluating the number of atoms. Mass spectrometry plays a significant role in determining nanoparticle composition at the atomic level. Significant progress has been made in understanding ultra-small gold nanoparticles, like Au25(SR)18 and Au38(SR)24, with a Au core diameter of 0.97 and 1.3 nm, respectively. However, progress in small plasmonic nanoparticles (2 - 5 nm) is currently challenging, due in part to limitations in synthesizing monodisperse nanoparticles. Here, we report a plasmonic nanocrystal that is highly monodisperse, with an unprecedented variation of less than 20 gold atoms. The composition of the super-stable plasmonic nanocrystals at 115 kDa was determined to contain Au500 10SR120 3. The Au~500 system, named Faraduarate-500, is the largest size to be characterized using high resolution ESI mass spectrometry. Atomic pair distribution function (PDF) data shows that the local atomic structure is consistent with a face-centered cubic (fcc) or Marks decahedral arrangement. High resolution scanning transmission electron microscopy images show that the diameter is 2.4 0.1 nm. The radius of gyration measured by small angle X-ray scattering (SAXS), is 1.05 0.05 nm, and the size and the shape of SAXS molecular envelope are in agreement with TEM and PDF measurements.

Kumara, Chanaka [University of Mississippi, The; Zuo, Xiaobing [Advanced Photon Source, Argonne National Laboratory (ANL); Ilavsky, Dr. Jan [Argonne National Laboratory (ANL); Chapman, Karena [Advanced Photon Source, Argonne National Laboratory (ANL); Cullen, David A [ORNL; Dass, Amala [University of Mississippi, The

2014-01-01T23:59:59.000Z

496

Radiosensitizing effect of gold nanoparticles in carbon ion irradiation of human cervical cancer cells  

SciTech Connect

Noble metal nanoparticles have received considerable attention in biotechnology for their role in bio sensing due to surface plasmon resonance, medical diagnostics due to better imaging contrast and therapy. The radiosensitization effect of gold nanoparticles (AuNP) has been gaining popularity in radiation therapy of cancer cells. The better depth dose profile of energetic ion beam proves its superiority over gamma radiation for fighting against cancer. In the present work, the glucose capped gold nanoparticles (Glu-AuNP) were synthesised and internalized in the HeLa cells. Transmission electron microscopic analysis of ultrathin sections of Glu-AuNP treated HeLa cells confirmed the internalization of Glu-AuNPs. Control HeLa cells and Glu-AuNp treated HeLa cells were irradiated at different doses of 62 MeV 12C ion beam (LET - 290keV/{mu}m) at BIO beam line of using 15UD Pelletron accelerator at Inter University Accelerator Centre, New Delhi, India. The survival fraction was assessed by colony forming assay which revealed that the dose of carbon ion for 90% cell killing in Glu-AuNP treated HeLa cells and control HeLa cells are 2.3 and 3.2 Gy respectively. This observation shows {approx} 28% reduction of {sup 12}C{sup 6+} ion dose for Glu-AuNP treated HeLa cells as compared to control HeLa cells.

Kaur, Harminder; Avasthi, D. K.; Pujari, Geetanjali; Sarma, Asitikantha [Inter University Accelerator Centre, Aruna Asaf Ali Marg, Post box-10502, New Delhi-110067 (India)

2013-07-18T23:59:59.000Z

497

Turning green into gold: a framework for energy performance contracting (EPC) in China's real estate industry  

Science Journals Connector (OSTI)

Abstract There is a growing interest in a sustainable built environment and green technologies are gaining worldwide attention. However, implementing green technologies usually requires more investment than using traditional technologies and the payback period tends to be very long. In China, most developers sell their properties and subsequently transfer the ownership to customers. Hence, a crucial problem for promoting green construction is that developers cannot obtain economic profits (gold) from implementing green technologies. Meanwhile, other stakeholders, such as property management companies, are also hesitant to adopt green technologies because of the large investment involved and their lack of experience. To tackle this problem, an energy performance contracting (EPC) based framework is proposed, to turn green investment into gold benefit by careful sharing of the risks existed. The framework was developed by conducting a focus group meeting with three experienced representatives from developer, property management company and energy service company respectively. A real-life case study, which includes both energy efficient system retrofit and new construction, is used to estimate the costs and benefits involved to demonstrate and verify the conceptual framework. The results show that the proposed framework can support the application of green technologies in both types of projects. Economic benefits as well as environmental benefits can be gained for the project stakeholders and the whole society.

Xiaoling Zhang; Zezhou Wu; Yong Feng; Pengpeng Xu

2014-01-01T23:59:59.000Z

498

Observations of proton beam enhancement due to erbium hydride on gold foil targets  

SciTech Connect

Recent theoretical work suggests that the conversion efficiency from laser to protons in laser irradiated thin foil experiments increases if the atomic mass of nonhydrogen atoms on the foil rear surface increases. Experiments were performed at the Lawrence Livermore National Laboratory Jupiter Laser Facility to observe the effect of thin foils coated with erbium hydride on the conversion efficiency from laser to protons. Gold foils with and without the rear surface coated with ErH{sub 3} were irradiated using the ultrashort pulse, 40 TW Callisto laser. An argon-ion etching system was used to remove naturally occurring nanometer thick surface layer contaminants from the hydride. With the etcher, gold with ErH{sub 3} showed a 25% increase in the conversion efficiency to protons above 3.4 MeV relative to contaminants, where C{sup +4} and H{sup +} were the dominant ion species. No difference in the ion signal was observed without first cleaning the hydrides. Simulations using the hybrid PIC code, LSP, revealed that the increase due to erbium hydride versus contaminants is 37% for protons above 3 MeV.

Offermann, D. T.; Van Woerkom, L. D. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Freeman, R. R. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093 (United States); Department of Applied Science, University of California Davis, Livermore, California 94550 (United States); Foord, M. E.; Hey, D.; Key, M. H.; Mackinnon, A. J.; MacPhee, A. G.; Patel, P. K.; Ping, Y.; Sanchez, J. J.; Shen, N. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Bartal, T.; Beg, F. N. [Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California 92093 (United States); Espada, L. [Sandia National Laboratory, Albuquerque, New Mexico 87185 (United States); Chen, C. D. [Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

2009-09-15T23:59:59.000Z

499

The adsorption of gold, palladium and platinum from acidic chloride solutions on mesoporous carbons.  

SciTech Connect

Studies on the adsorption characteristics of gold, palladium and platinum on mesoporous carbon (CMK-3) and sulfur-impregnated mesoporous carbon (CMK-3/S) evaluated the benefits/drawbacks of the presence of a layer of elemental sulfur inside mesoporous carbon structures. Adsorption isotherms collected for Au(III), Pd(II) and Pt(IV) on those materials suggest that sulfur does enhance the adsorption of those metal ions in mildly acidic environment (pH 3). The isotherms collected in 1 M HCl show that the benefit of sulfur disappears due to the competing influence of large concentration of hydrogen ions on the ion-exchanging mechanism of metal ions sorption on mesoporous carbon surfaces. The collected acid dependencies illustrate similar adsorption characteristics for CMK-3 and CMK-3/S in 1-5 M HCl concentration range. Sorption of metal ions from diluted aqueous acidic mixtures of actual leached electronic waste demonstrated the feasibility of recovery of gold from such liquors.

Peter Zalupski; Rocklan McDowell; Guy Dutech

2014-10-01T23:59:59.000Z

500

Predictions of fast wave heating, current drive, and current drive antenna arrays for advanced tokamaks  

SciTech Connect

The objective of the advanced tokamak program is to optimize plasma performance leading to a compact tokamak reactor through active, steady state control of the current profile using non-inductive current drive and profile control. To achieve these objectives requires compatibility and flexibility in the use of available heating and current drive systems--ion cyclotron radio frequency (ICRF), neutral beams, and lower hybrid. For any advanced tokamak, the following are important challenges to effective use of fast waves in various roles of direct electron heating, minority ion heating, and current drive: (1) to employ the heating and current drive systems to give self-consistent pressure and current profiles leading to the desired advanced tokamak operating modes; (2) to minimize absorption of the fast waves by parasitic resonances, which limit current drive; (3) to optimize and control the spectrum of fast waves launched by the antenna array for the required mix of simultaneous heating and current drive. The authors have addressed these issues using theoretical and computational tools developed at a number of institutions by benchmarking the computations against available experimental data and applying them to the specific case of TPX.

Batchelor, D.B.; Baity, F.W.; Carter, M.D. [and others

1994-12-31T23:59:59.000Z