Results 221 to 230 of about 3,479 (265)
Some of the next articles are maybe not open access.
Seismic vibration testing with sine beats
Nuclear Engineering and Design, 1973Abstract Analytical developments and testing procedures are presented for a method of testing nuclear power plant equipment under simulated seismic excitations. The method utilizes a standard shape of input motion considered to envelop most of the usual seismic time histories at the supports of the equipment.
openaire +1 more source
Coherent Vibrational Quantum Beats as a Probe of Langmuir−Blodgett Monolayers
The Journal of Physical Chemistry B, 2005We combine frequency- and femtosecond time-domain measurements of vibrational coherences for spectroscopic characterization of surface monolayer films, utilizing 3-wave mixing as the surface-selective technique. Frequency-domain spectra in the CH-stretch region are obtained by infrared + visible sum frequency generation (SFG).
Andrey N, Bordenyuk +2 more
openaire +2 more sources
Beating motion of a circular cylinder in vortex-induced vibrations
Fluid Dynamics Research, 2018In this paper, beating phenomenon of a circular cylinder in vortex-induced vibration is studied by numerical simulations in a systematic manner. The cylinder mass coefficients of 2 and 10 are considered, and the Reynolds number is 150. Two distinctive frequencies, namely cylinder oscillation and vortex shedding frequencies, are obtained from the ...
Linwei Shen, Eng-Soon Chan, Yan Wei
openaire +1 more source
The Physics Teacher, 1999
I showed Derrick Boucher’s acoustic demonstration of beats and interference to a colleague, and as we were talking I mentioned that the function generator could be hooked to mechanical wave drivers to obtain nice standing waves. Then it’s possible to verify that law of vibrating strings. However, we kept coming back to the concept of beats.
openaire +1 more source
I showed Derrick Boucher’s acoustic demonstration of beats and interference to a colleague, and as we were talking I mentioned that the function generator could be hooked to mechanical wave drivers to obtain nice standing waves. Then it’s possible to verify that law of vibrating strings. However, we kept coming back to the concept of beats.
openaire +1 more source
Quantum beating of vibrational factor group components in molecular solidsa)
The Journal of Chemical Physics, 1983We report the first observation of coherent Raman induced quantum beats from exciton states in molecular crystals. The paper describes the relevant crystal optics and phasematching conditions needed to ensure coherent excitation of more than one Raman transition in an anisotropic solid.
S. Velsko, J. Trout, R. M. Hochstrasser
openaire +1 more source
Vibrational quantum beats observed by Raman-induced optical Kerr effect
Molecular Physics, 1995Ultra fast molecular motion in liquids may be studied in the time domain with the pump/probe optical heterodyne-detected (OHD) Raman-induced optical Kerr effect (RIKE) technique, which makes use of ultra short pulses from a mode-locked laser. The oscillatory signal observed is attributed to vibrational quantum interference, and a detailed theoretical ...
Tzer-Hsiang Huang, Chin-Hsien Wang
openaire +1 more source
Breaths and beats: Vibrating at the borders of memory
Dance Research Aotearoa, 2020Writing out of dancing how do I address the dynamic, troubled, testing, transforming, vibrant and inventive work of dance through a dialogue with the past? How might the inter-corporeal transmission of learning to dance from a renowned teacher of a European style of modern expressive dance in Ōtepoti, Dunedin, Aotearoa instil lifelong values and ...
openaire +1 more source
Delayed-coincidence Mössbauer and quantum-beat measurements of a vibrating source
Physics Letters A, 1985Abstract Mossbauer and quantum-beat spectra of a 57 Co source vibrating with a frequency of about 10 MHz were measured in delayed coincidence with the 122 keV radiation feeding the 14.4 keV transition. The results are in reasonable agreement with the optical theory.
Zhang, G.L. +2 more
openaire +2 more sources
Bridge vibration logarithmic decrement estimation at the presence of amplitude beat
Measurement, 2011Abstract Logarithmic decrement is one of the key dynamic parameters characterizing bridge status. It is usually estimated from vibration records applying digital signal processing. Among the processing procedures band-pass filtering is commonly used to extract spectral components of interest.
Ž. Nakutis, P. Kaškonas
openaire +1 more source
Reduced ride comfort caused by beating idle vibrations in passenger vehicles
International Journal of Industrial Ergonomics, 2017Abstract Idle vibrations that occur in passenger vehicles at a stop cause passengers to feel discomfort, thus leading to reduced ride comfort. Beating vibration takes place when the frequency of engine vibrations is similar to the frequency of vibrations due to auxiliary parts in the engine room, and this produces a rapid deterioration in ride ...
Jinhan Park +3 more
openaire +1 more source