Results 221 to 230 of about 14,974 (268)
Some of the next articles are maybe not open access.
Vibration-based delamination detection in composite beams through frequency changes
Journal of Vibration and Control, 2014Delamination is a common damage in fibre reinforced composite laminates, usually hidden from external view, that can substantially reduce the structural stiffness which changes the dynamic response of the structures such as natural frequencies. Natural frequencies are the most reliable parameters for detecting damage while they do not directly provide
Zhifang Zhang +3 more
openaire +1 more source
International Archives of Occupational and Environmental Health, 1997
The present investigation evaluated the effects of changes in pelvic orientation and vibration frequency on the seated human's response to wholebody vibration (WBV). Seat-to-trunk and seat-to-head acceleration transmissibility, peak-to-peak pelvic motion and erector spinae EMG and mean erector spinae EMG was collected across three pelvic orientations ...
C L, Zimmermann, T M, Cook
openaire +2 more sources
The present investigation evaluated the effects of changes in pelvic orientation and vibration frequency on the seated human's response to wholebody vibration (WBV). Seat-to-trunk and seat-to-head acceleration transmissibility, peak-to-peak pelvic motion and erector spinae EMG and mean erector spinae EMG was collected across three pelvic orientations ...
C L, Zimmermann, T M, Cook
openaire +2 more sources
Role of frequency changes in vibrational energy transfer
Chemical Physics Letters, 1984Abstract The interaction potential energy term quadratic in vibrational coordinate is shown to cause a disturbance in vibrational frequencies during the ...
openaire +1 more source
Altering structures to move vibration frequencies using acceptable changes
International Journal of Solids and Structures, 2002zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
Communications in Theoretical Physics, 2011
In this paper, we investigate a two electronic level system with vibrational modes coupled to a Brownian oscillator bath. The difference frequency generation (DFG) signals and sum frequency generation (SFG) signals are calculated. It is shown that, for the same model, the SFG signals are more sensitive than the DFG signals to the changes of the ...
An-Na Gu, Xian-Ting Liang
openaire +1 more source
In this paper, we investigate a two electronic level system with vibrational modes coupled to a Brownian oscillator bath. The difference frequency generation (DFG) signals and sum frequency generation (SFG) signals are calculated. It is shown that, for the same model, the SFG signals are more sensitive than the DFG signals to the changes of the ...
An-Na Gu, Xian-Ting Liang
openaire +1 more source
Vaporization energy change and vibrational frequency shift in substituted mono-halo-benzenes
Theoretica Chimica Acta, 1970Direct linear relation exists between the reduced vaporization energy change (ΔHv/RTB) of benzene and its homologues, C6H5X (X=F, Cl, Br, I) and the X-sensitive dimensionless frequency (hcv/kTB) at their respective normal boiling point (TB) temperatures.
J. Lielmezs +3 more
openaire +1 more source
Japanese Journal of Applied Physics, 2004
In this paper, the characteristics of the acceleration sensor utilizing the resonance frequency change in the flexural vibrator are examined experimentally. The sensor sample was produced using stainless steel. It was confirmed that the relationship between the applied acceleration and the resonance frequency change becomes linear and almost ...
Jun Takahashi, Sumio Sugawara
openaire +1 more source
In this paper, the characteristics of the acceleration sensor utilizing the resonance frequency change in the flexural vibrator are examined experimentally. The sensor sample was produced using stainless steel. It was confirmed that the relationship between the applied acceleration and the resonance frequency change becomes linear and almost ...
Jun Takahashi, Sumio Sugawara
openaire +1 more source
Changes in the vibrational frequencies of adsorbed molecules due to an applied electric field
Journal of Electroanalytical Chemistry and Interfacial Electrochemistry, 1984Resultats de calculs de la structure electronique d'adsorption moleculaire et discussion de ses modifications possibles sous l'effet d'un champ electrique applique.
S. Holloway, J.K. Nørskov
openaire +2 more sources
Influence of low-frequency vibration on changes of biochemical parameters of living rats
The Journal of the Acoustical Society of America, 2004The aim of the research was to investigate how some selected biochemical parameters of living rats depend on exposure of low-frequency vibrations. Experiments were run on 30 Wistar rats randomly segregated into three groups: (I) 20 days old (before puberty), (II) 70th day after; (III) control group.
Cezary Kasprzak +2 more
openaire +1 more source
Human Movement Science, 2012
Studies assessing whole body vibration (WBV) have produced largely positive effects, with some neutral, on postural control with frequencies between 25 and 40 Hz. However no conclusive evidence indicates that 25-40 Hz elicits the optimal beneficial effects.
D Clark, Dickin +4 more
openaire +2 more sources
Studies assessing whole body vibration (WBV) have produced largely positive effects, with some neutral, on postural control with frequencies between 25 and 40 Hz. However no conclusive evidence indicates that 25-40 Hz elicits the optimal beneficial effects.
D Clark, Dickin +4 more
openaire +2 more sources