Results 21 to 30 of about 696,335 (290)

Dynamics of perpendicular recording heads [PDF]

open access: yes, 2001
3D modeling and inductance measurements were used to design an ultra-high frequency perpendicular system. Kerr microscopy and spin-stand experiments with focused ion beam (FI-B) trimmed perpendicular heads and perpendicular media directly verified the ...
Bain, J.   +7 more
core   +1 more source

The Econometrics of Ultra-high-frequency Data [PDF]

open access: yesEconometrica, 2000
Summary: Ultra-high-frequency data is defined to be a full record of transactions and their associated characteristics. The transaction arrival times and accompanying measures can be analyzed as marked point processes. The ACD point process developed by \textit{R. F. Engle} and \textit{J. R. Russell} [Econometrica 66, No.
openaire   +1 more source

Terahertz photoconductive emitter with dielectric-embedded high-aspect-ratio plasmonic grating for operation with low-power optical pumps

open access: yesAIP Advances, 2019
We report on the design, optimization and fabrication of a plasmon-assisted terahertz (THz) photoconductive antenna (PCA) for THz pulse generation at low-power optical pumps.
D. V. Lavrukhin   +11 more
doaj   +1 more source

Laser-driven high-power X- and gamma-ray ultra-short pulse source

open access: yes, 2008
A novel ultra-bright high-intensity source of X-ray and gamma radiation is suggested. It is based on the double Doppler effect, where a relativistic flying mirror reflects a counter-propagating electromagnetic radiation causing its frequency ...
A. G. Zhidkov   +7 more
core   +2 more sources

Refractivity variations and propagation at Ultra High Frequency

open access: yesResults in Physics, 2017
Present framework is established to deal with the refractivity variations normally affected the radio waves propagation at different frequencies, ranges and different environments.
I. Alam   +4 more
doaj   +1 more source

Predictions of ultra-harmonic oscillations in coupled arrays of limit cycle oscillators

open access: yes, 2006
Coupled distinct arrays of nonlinear oscillators have been shown to have a regime of high frequency, or ultra-harmonic, oscillations that are at multiples of the natural frequency of individual oscillators.
A. Pikovsky   +4 more
core   +1 more source

Mixed effect model for absolute log returns of ultra high frequency data [PDF]

open access: yes, 2005
The influence of covariates on absolute log returns of ultra high frequency data is analysed. Therefore we construct a mixed effect model for the absolute log returns. The parameters are estimated in a state space approach.
Czado, Claudia, Haug, Stephan
core   +3 more sources

Ultra-high-frequency piecewise-linear chaos using delayed feedback loops

open access: yes, 2012
We report on an ultra-high-frequency (> 1 GHz), piecewise-linear chaotic system designed from low-cost, commercially available electronic components.
Chua L. O.   +3 more
core   +1 more source

Gravitational Wave Detection with High Frequency Phonon Trapping Acoustic Cavities [PDF]

open access: yes, 2014
There are a number of theoretical predictions for astrophysical and cosmological objects, which emit high frequency ($10^6-10^9$~Hz) Gravitation Waves (GW) or contribute somehow to the stochastic high frequency GW background.
Goryachev, Maxim, Tobar, Michael E.
core   +1 more source

Lumped element balanced multi-band bandstop filter for ultra high frequency applications

open access: yesThe Journal of Engineering, 2020
An ultra-compact multi-band balanced (differential) bandstop filter (BSF) topology with all lumped elements has been introduced for the first time in this study.
Dubari Borah, Thottam S. Kalkur
doaj   +1 more source

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