نتایج جستجو برای: modulation depths

تعداد نتایج: 168555  

Journal: :The Journal of the Acoustical Society of America 2003
Leonid M Litvak Bertrand Delgutte Donald K Eddington

Rubinstein et al. [Hearing Res. 127, 108-118 (1999)] suggested that the representation of electric stimulus waveforms in the temporal discharge patterns of auditory-nerve fiber (ANF) might be improved by introducing an ongoing, high-rate, desynchronizing pulse train (DPT). To test this hypothesis, activity of ANFs was studied in acutely deafened, anesthetized cats in response to 10-min-long, 5-...

Journal: :The Journal of the Acoustical Society of America 2001
W S Rhode A Recio

The response of chinchilla basilar membrane in the basal region of the cochlea to multicomponent (1, 3, 5, 6, or 7) stimuli was studied using a laser interferometer. Three-component stimuli were amplitude-modulated signals with modulation depths that varied from 25% to 200% and the modulation frequency varied from 100 to 2000 Hz while the carrier frequency was set to the characteristic frequenc...

2008
Josep Carreras J. Arbiol B. Garrido C. Bonafos

We propose a light emitting transistor based on silicon nanocrystals provided with 200 Mbits /s built-in modulation. Suppression of electroluminescence from silicon nanocrystals embedded into the gate oxide of a field effect transistor is achieved by fast Auger quenching. In this process, a modulating drain signal causes heating of carriers in the channel and facilitates the charge injection in...

Journal: :Int. J. Math. Mathematical Sciences 2012
Lars Kadison

The minimum depth d B,A of a subring B ⊆ A introduced in the work of Boltje, Danz and Külshammer 2011 is studied and compared with the tower depth of a Frobenius extension. We show that d B,A < ∞ if A is a finite-dimensional algebra and B has finite representation type. Some conditions in terms of depth and QF property are given that ensure that the modular function of a Hopf algebra restricts ...

Journal: :iranian journal of medical physics 0
reza moghadam-drodkhani m.sc. in medical physics, medical physics and engineering dept., faculty of medicine, tehran university of medical sciences, tehran, iran nader riyahi-alam professor, medical physics and engineering dept., faculty of medicine, tehran university of medical sciences, tehran, iran abbas takavar professor, medical physics and engineering dept., faculty of medicine, tehran university of medical sciences, tehran, iran kavous firoznia associate professor, radiology dept., imaging center of imam khomeini hospital, faculty of medicine, tehran university of medical sciences, tehran, iran peiman hadad associate professor, radiotherapy dept., imam khomeini hospital, faculty of medicine, tehran university of medical sciences, tehran, iran behrooz rafiee m.sc., radiology dept., imaging center of imam khomeini hospital, faculty of medicine, tehran university of medical sciences, tehran, iran

introduction: the conventional methods of dosimetry are not capable of dosimetry in such a small volume of less than one cubic millimeter. although the polymer gel dosimetry method based on magnetic resonance imaging (mri) could achieve three dimensional dosimetry with high resolution, a spatial resolution evaluation based on gel dose modulation transfer function has not been investigated yet. ...

Journal: :Journal of neurophysiology 2012
Jeffrey S Johnson Pingbo Yin Kevin N O'Connor Mitchell L Sutter

Amplitude modulation (AM) is a common feature of natural sounds, and its detection is biologically important. Even though most sounds are not fully modulated, the majority of physiological studies have focused on fully modulated (100% modulation depth) sounds. We presented AM noise at a range of modulation depths to awake macaque monkeys while recording from neurons in primary auditory cortex (...

Journal: :Vision Research 2000
Tricia L Callahan Heywood M Petry

Temporal modulation sensitivity functions (MSFs) were measured behaviorally in three adult tree shrews (Tupaia belangeri). Shrews were trained to detect temporal sinusoidally-modulated full-field luminance variations in one of three stimuli, the two alternatives being static stimuli of equal size and time-averaged luminance (34 cd/m2). Modulation depth was varied trial-by-trial using a modified...

2015
Rosa Weigand Margarita Sánchez Balmaseda José Manuel Guerra Pérez Malte C. Kaluza

We have numerically studied the influence of the absorption modulation depth of carbon-based saturable absorbers (graphene and carbon nanotubes (CNTs)) on the Q-switched regime of a diode-pumped Nd:YLF laser. A short-length cavity was used with an end mirror on which CNTs or monoor bi-layer graphene were deposited, forming a saturable absorber mirror (SAM). Using a standard model, the generated...

Journal: :The Journal of the Acoustical Society of America 2010
Yi Shen Jennifer J Lentz

To determine the effects of hearing loss and fast-acting compression on auditory grouping based on across-frequency modulation, modulation detection interference (MDI) was measured in listeners with normal hearing and hearing loss. MDI, the increase in the amplitude-modulation detection threshold of a target presented with an interferer distant in frequency, was measured using a 500-Hz target a...

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