نتایج جستجو برای: 1d sh transfer functions show indeed a weak amplification for frequencies above 2 hz
تعداد نتایج: 16721503 فیلتر نتایج به سال:
The effect of electrical currents by different modalities on wound healing has been experimented. In this study a survey of the literature shows different results, and the mechanisms of action have not been elucidated for certain. The aim of this study was to compare the results obtained from low voltage-square wave stimulation of different frequencies. Results show that the healing period ...
In this paper, the spectral ratio of mmicrotremor, HSVR, is presented for estimating the liquefaction potential of layered soil in the coastal area of the Persian Gulf, which consists of a hard sandstone layer situated between two saturated sandy layers. The surface layer is thin, with a thickness between 2 and 5 meters. The purpose of this paper is to identify the relation between the liquefac...
We developed a new method of determining site response and amplification for use in hazard analysis and station corrections. The method employs the conversion of P to S energy beneath a soft-rock station, which results in complex receiver functions that are frequency and amplitude dependent. At low frequencies ( 0.1 Hz), the ratio of vertical to radial energies for Pnl appear uniform across the...
In this contribution a new method for artificial bandwidth extension of telephone speech towards frequencies below 300 Hz is proposed. The method defines a self-contained module which can be applied to any artificial bandwidth extension system, designed for extending the bandwidth only to frequencies above the telephone-band. At this, the amplification of a separate ARMA filter with a pass-band...
The vestibulo-ocular reflex (VOR) generated by voluntary head movements keyed to a tone varying sinusoidally in pitch was studied in 13 men. Modulation of pitch at frequencies ranging from 0.1-5.0 Hz yielded systematic variation in head movement frequencies, although above 2 Hz head frequencies fell below requested frequencies. Three conditions of visual stimulation were used. When an Earth-fix...
Weak microwave radiation (WMR) in our environment has raised health concerns in the public. Among those, communication frequencies are more than ever becoming widespread and their effects need thorough studies. A correct understanding of these effects in-vivo by in-vitro experiments shall preferentially use primary cells. In this study we compared non-modulated (CW) and modulated WMR exposure o...
the aim of this investigation is to compare the effect of applying two transcutaneous electrical nerve stimulation (tens) current with different frequencies (2 hz & 100 hz) on hoffmann reflex recorded from gastrosoleus muscle of healthy people. forty female subjects between 20 to 30 years of age were participated in this quasi-experimental design. twenty of them were exposed to the 100 hz curre...
Abstract The combined effect of topography and near-surface heterogeneities on the seismic response is hardly predictable may lead to an aggravation ground motion. We apply physics-based numerical simulations 3D wave propagation highlight these effects in case study Arquata del Tronto, a municipality Apennines that includes historical village hill hamlet flat terrain alluvial basin. two hamlets...
adolescents and young adults and their problems is an issue whose importance is obvious to anyone because youth are the founders of our countrys future and requires proper planning to be on leisure. given the importance of leisure,this study to investigate needs assessment and planning how adolescents and young adults spend their leisure time in urban of case study of high school girls and boys...
Classrooms, as one of the most important educational environments, play a major role in the learning and academic progress of students. reverberation time, as one of the most important acoustic parameters inside rooms, has a significant effect on sound quality. The inefficiency of classical formulas such as Sabin, caused this article to examine the use of machine learning methods as an alternat...
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