We present a complete systematic study on the effect of assist beam energy on SiO2/HfO2 quarter wave stacks deposited by dual ion beam sputter (DIBS) deposition. Increasing assist beam energy results in lower surface ...
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Fluctuation conductivity σ' () above Tc as a function of the reduced temperature was measured in polycrystalline YBa2Cu3O7 and LaBaCaCu3O7 with Zn doping. The results for σ' () are analyzed in terms of the A...
Fluctuation conductivity σ' () above Tc as a function of the reduced temperature was measured in polycrystalline YBa2Cu3O7 and LaBaCaCu3O7 with Zn doping. The results for σ' () are analyzed in terms of the Aslamazov-Larkin theory for a layered superconductor in which effect of d-wave pairing as well as that of short-wavelength cutoff is taken into account. The d-wave character appears in the σ'() formula as renormalization effects on the fluctuation amplitude and the reduced temperature. Good agreement is attained between theory and experiment even in a high e region, which allows us to discuss the doping dependence of the fluctuation amplitude and the out-of-plane coherence length. The d-wave nature could be responsible for the doping dependence of the fluctuation amplitude.
We present an experimental demonstration of polarization controlled extraordinary light transmission in rectangular coaxial aperture arrays at mid-infrared wavelengths. Shape anisotropy is utilized for total suppressi...
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Single-phase nanohybrids of Bi2Sr2CaCuO8+d (Bi2212) with alkylammonium salts have been synthesized for the first time by a stepwise intercalation method. To increase the gallery height between the Bi-0 layers of Bi221...
Single-phase nanohybrids of Bi2Sr2CaCuO8+d (Bi2212) with alkylammonium salts have been synthesized for the first time by a stepwise intercalation method. To increase the gallery height between the Bi-0 layers of Bi2212 crystal, intercalated precursor was prepared by the chemical vapor transport technique with Bi2212 and HgBr2 in a sealed quartz ampoule. Then, n-dodecyl trimetylammonium bromide (DTA:Br) or n-hexadecyl trimethylammonium bromide (HTA:Br) was intercalated into HgBr2/Bi2212 via ion exchange method. Nanohybrids were characterized by powder X-ray diffraction (XRD). There was no trace of the pristine phase in XRD patterns for all nanohybrids, indicating that DTA or HTA ion is incorporated homogeneously into each Bi2212 layer It is found that the gallery height of Bi2212 host is expanded from 3.08 run to 8.22 run (Δc = 5.14 nm) in HTA/Bi2212 nanohybrid. HTA/Bi2212 nanohybrid was exfoliated into single layers in acetone. A transparent colloid is found to be stable for 5 days after ultrasonication.
In practice, unmanned vehicle control relies heavily upon human operators for all but the simplest decisions. This operator intensive requirement combines with a lack of long range, high bandwidth underwater communica...
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ISBN:
(纸本)9781615671946
In practice, unmanned vehicle control relies heavily upon human operators for all but the simplest decisions. This operator intensive requirement combines with a lack of long range, high bandwidth underwater communications to severely limit autonomous undersea vehicles (AUV) ability to rapidly respond to changes in the operating environment. This paper describes control and communications techniques that enable one or more AUVs to accomplish mission-level objectives within constantly changing engagements without requiring constant operator interactions. We describe an AUV architecture that supports heterarchical, delay tolerant networking protocols and the Dynamic Co-Fields (DCF) multi-vehicle control technique. Together these techniques provide AUVs with an ability to collectively adapt to changes by devising a course of action that supports operational "mission-level" objectives. DCF is a stigmergic control technique which, unlike traditional course-of-action planners, is capable of rapidly responding to changes in large complex systems.
The development of microbubbles has had considerable impact on the field of diagnostic ultrasound. These minute, gas- or lipid-filled spheres have enabled imaging in the kidney, liver, heart, and myocardium with resol...
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We discuss the feasibility of deploying two materials with close but opposite epsilon values for achieving deep-subwavelength surface plasmon polariton waveguides. In particular, waveguiding properties of a silver-sil...
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ISBN:
(纸本)9789038613178
We discuss the feasibility of deploying two materials with close but opposite epsilon values for achieving deep-subwavelength surface plasmon polariton waveguides. In particular, waveguiding properties of a silver-silicon waveguide with a 25nm core size at 600nm wavelength are examined. Such waveguides potentially allows for ultrahigh-density optical integration.
Instead of using three properties (Rm-tensile strength, Nb-number of bends, Nt-number of twists) for estimation of wire quality, this paper uses new indicators: Wb = Rm/Nb;Wt = Rm/Nt;and W = Wb + Wt. It has been found...
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In Fig. 2 of our paper,1 the correct units of the electric field should be mV/cm instead of V/cm and the units of the current density J should be kA/cm2 instead
In Fig. 2 of our paper,1 the correct units of the electric field should be mV/cm instead of V/cm and the units of the current density J should be kA/cm2 instead
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