Results 41 to 50 of about 185,099 (167)

Optical sum rule violation, superfluid weight and condensation energy in the cuprates

open access: yes, 2000
The model of hole superconductivity predicts that the superfluid weight in the zero-frequency $\delta$-function in the optical conductivity has an anomalous contribution from high frequencies, due to lowering of the system's kinetic energy upon entering ...
A.A. Tsvetkov   +44 more
core   +1 more source

Target Acquisition in Multiscale Electronic Worlds [PDF]

open access: yes, 2004
Since the advent of graphical user interfaces, electronic information has grown exponentially, whereas the size of screen displays has stayed almost the same.
Beaudouin-Lafon, Michel, Guiard, Yves
core  

Broadband Excitation by Chirped Pulses: Application to Single Electron Spins in Diamond

open access: yes, 2013
Pulsed excitation of broad spectra requires very high field strengths if monochromatic pulses are used. If the corresponding high power is not available or not desirable, the pulses can be replaced by suitable low-power pulses that distribute the power ...
Abe, H.   +11 more
core   +1 more source

Fully Tunable Bandpass Filter With Wide Bandwidth Tuning Range and Switchable Single/Dual Band

open access: yesIEEE Access
In this paper, a fully tunable bandpass filter (BPF) with three states of filtering (single passband state, dual passband state and all-off state) is proposed, the proposed fully tunable BPF is cascaded by a tunable low pass filter section (LP) and a ...
Shuang Li   +4 more
doaj   +1 more source

Transport properties in correlated systems: An analytical model

open access: yes, 2005
Several studies have so far investigated transport properties of strongly correlated systems. Interesting features of these materials are the lack of resistivity saturation well beyond the Mott-Ioffe-Regel limit and the scaling of the resistivity with ...
A. A. Abrikosov   +6 more
core   +1 more source

Optimal Adjacent Output Phase Difference Assignments in Generalized One-Dimensional Five-Beam Switching Matrices

open access: yesIEEE Journal of Microwaves
This paper discusses the optimal assignment of phase differences between adjacent output ports in a recently proposed generalized one-dimensional orthogonal switching matrix with five beams by considering the RF performance of the compared matrices ...
Shengjia Wu   +3 more
doaj   +1 more source

Parametric down-conversion from a wave-equations approach: geometry and absolute brightness

open access: yes, 2009
Using the approach of coupled wave equations, we consider spontaneous parametric down-conversion (SPDC) in the narrow-band regime and its relationship to classical nonlinear processes such as sum-frequency generation.
D. N. Klyshko   +6 more
core   +1 more source

Microwave and Millimeter-Wave Permittivities of Single-Crystal AlN, Including Thickness and Temperature Dependence

open access: yesIEEE Journal of Microwaves
For electronic applications, polycrystal AlN has been widely used in packaging. Polycrystal AlN thin films with columnar grains have also been widely used in acoustic filters. Recently, with the availability of single-crystal AlN bulk wafers, transistors
Yoshiyuki Yanagimoto   +5 more
doaj   +1 more source

Regression machine learning methods for isolation prediction and massive gain broadband MIMO antenna design for 28 GHz applications

open access: yesResults in Optics
This research paper investigates the design and analysis of a miniaturized mm-Wave MIMO antenna array tailored for fifth-generation applications. The antenna demonstrates a calculated 10-dB impedance bandwidth of 16.61 % (27.137–31.788 GHz).
Md.Ashraful Haque   +5 more
doaj   +1 more source

Wind Speed Forecasting with Differentially Evolved Minimum-Bandwidth Filters and Gated Recurrent Units

open access: yesForecasting
Wind data are often cyclostationary due to cyclic variations, non-constant variance resulting from fluctuating weather conditions, and structural breaks due to transient behaviour (due to wind gusts and turbulence), resulting in unreliable wind power ...
Khathutshelo Steven Sivhugwana   +1 more
doaj   +1 more source

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