Results 251 to 260 of about 313,545 (301)
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Frequency coupling in dual frequency capacitively coupled radio-frequency plasmas
Applied Physics Letters, 2006An industrial, confined, dual frequency, capacitively coupled, radio-frequency plasma etch reactor (Exelan®, Lam Research) has been modified for spatially resolved optical measurements. Space and phase resolved optical emission spectroscopy yields insight into the dynamics of the discharge.
Gans, Timo +6 more
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A Dual-Frequency Coupled Resonator Transducer
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2020New ultrasound-mediated drug delivery systems, such as acoustic cluster therapy or combined imaging and therapy systems, require transducers that can operate beyond the bandwidth limitation (~100%) of conventional piezoceramic transducers. In this article, a dual-frequency coupled resonator transducer (CRT) comprised of a polymeric coupling layer with ...
Kenneth Kirkeng Andersen +3 more
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Effects of reactor geometry and frequency coupling on dual-frequency capacitively coupled plasmas
Plasma Sources Science and Technology, 2013In dual-frequency (DF) capacitively coupled plasma discharges, the effect of reactor geometry on the plasma density is investigated by means of a two-dimensional self-consistent fluid model combined with a power supply computation module. The results indicate that by enlarging the inter-electrode gap or by blocking the electrode with dielectric ...
Zhen-Hua Bi +4 more
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Coupled Ring Resonators at Fibonacci Frequencies
2020 22nd International Conference on Transparent Optical Networks (ICTON), 2020Since the Middle Ages, Fibonacci (FB) numbers have attracted the interest of many scientists. In the recent years, a great research effort has been spent on the applications of FB numbers and sequences. It has been demonstrated that also some properties of resonant electronic systems are related to FB numbers. In this paper, an optical resonant device,
Ciminelli C. +3 more
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Frequency of Sexual Dysfunction in “Normal” Couples
New England Journal of Medicine, 1978In analyzing the responses of 100 predominantly white, well educated and happily married couples to a self-report questionnaire, this study examined the frequency of sexual problems experienced and the relations of those problems to sexual satisfaction. Although over 80 per cent of the couples reported that their marital and sexual relations were happy
E, Frank, C, Anderson, D, Rubinstein
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Coupled-Resonator Filters With Frequency-Dependent Couplings: Coupling Matrix Synthesis
IEEE Microwave and Wireless Components Letters, 2012This letter presents a novel technique for synthesis of coupled-resonator filters with inter-resonator couplings varying linearly with frequency. The values of non-zero elements of the coupling matrix are found by solving a nonlinear least squares problem involving eigenvalues of matrix pencils derived from the coupling matrix and reference zeros and ...
Lukasz Szydlowski +2 more
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Photorefractive pulse coupling in the frequency domain
Optics Letters, 1993We performed experiments to verify the theory of photorefractive pulse coupling in the frequency domain. In particular, we confirm that the phase added to the diffracted pulse depends quadratically on the relative delay between the two input pulses.
X S, Yao, J, Feinberg
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FREQUENCY OF MYCOPLASMA IN FERTILE AND INFERTILE COUPLES
Obstetrical & Gynecological Survey, 1974Abstract 120 infertile couples and 92 pregnant women and 38 of their consorts were studied to ascertain the frequency of mycoplasmas in the genital tract. Mycoplasma hominis was isolated from one or both partners in 13.2% of 38 fertile couples and 14.7% of 109 infertile couples; T mycoplasmas were isolated from one or both partners in 52.6% of ...
J, de Louvois +4 more
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Borehole coupling at sonic frequencies
Geophysics, 1990Abstract An elastic plane wave incident on a borehole couples through the borehole wall to produce a compressional wave inside the borehole, and the effect of this coupling varies with incident angle. Imaging experiments that include a downhole source and/or hydrophones must account for this effect to achieve optimal results.
J. R. Lovell, Brian E. Hornby
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Cross-Frequency Coupling in Cortical Processing of Speech
2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2022This study examines power-power cross-frequency coupling (CFC) between different frequency bands of cortical activity in normal-hearing (NH) listeners and its association to the processing temporal envelope (ENV) and temporal fine structure (TFS) of speech.
Shruthi Raghavendra +5 more
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