Niloy Choudhury

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The ear is a remarkably sensitive pressure fluctuation detector. In guinea pigs, behavioral measurements indicate a minimum detectable sound pressure of ∼20 μPa at 16 kHz. Such faint sounds produce 0.1-nm basilar membrane displacements, a distance smaller than conformational transitions in ion channels. It seems that noise within the auditory system would(More)
BACKGROUND Mammalian hearing is refined by amplification of the sound-evoked vibration of the cochlear partition. This amplification is at least partly due to forces produced by protein motors residing in the cylindrical body of the outer hair cell. To transmit power to the cochlear partition, it is required that the outer hair cells dynamically change(More)
Interferometric measurement of the vibration of the organ of Corti in the isolated guinea pig cochlea was conducted using low-coherence light (1310+/-47 nm wavelength) from a superluminescent diode. The short coherence length of the light source localized measurements along the axial direction to within a approximately 10-microm window (in tissue), even(More)
An optical coherence tomography (OCT) system is built to acquire in vivo both images and vibration measurements of the organ of Corti of the guinea pig. The organ of Corti is viewed through a approximately 300-microm-diam hole in the bony wall of the cochlea at the scala tympani of the first cochlear turn. In imaging mode, the image is acquired as(More)
The detection of sound by the mammalian hearing organ involves a complex mechanical interplay among different cell types. The inner hair cells, which are the primary sensory receptors, are stimulated by the structural vibrations of the entire organ of Corti. The outer hair cells are thought to modulate these sound-evoked vibrations to enhance hearing(More)
Spectral imaging requires rapid analysis of spectra associated with each pixel. A rapid algorithm has been developed that uses iterative matrix inversions to solve for the absorption spectra of a tissue using a lookup table for photon pathlength based on numerical simulations. The algorithm uses tissue water content as an internal standard to specify the(More)
In this paper we report a newly developed technique - laser calorimetry spectroscopy (LCS), which is a combination of laser absorption spectroscopy and calorimetry - for the detection of gases dissolved in liquids. The technique involves determination of concentration of a dissolved gas by irradiating the liquid with light of a wavelength where the gas(More)
In this paper we introduce a probabilistic model for data fusion for leak detection in oil and gas pipelines. We propose a fusion algorithm for both detecting and localizing leaks. Our algorithm optimally combines two heterogeneous systems, fiber optic Distributed Acoustic Sensing (DAS) and Internal Leak Detection (ILD) technology. The output of these two(More)
  • Adams Tn, Leonard Km, +24 authors Gu L Mohanty
  • 2015
(2013) Frequency sweep rate dependence on the dielectrophoretic response of polystyrene beads and red blood cells, Biomicrofluidics, 2013, 7: 064114. Human red blood cell deformation and crenation under high frequency spatial AC field, " under review, Biomicrofluidics, Oct 2013. (2013) A new in vitro-in vivo correlation for bioabsorbable magnesium stents(More)
The characterization of tissue morphology in murine models of pathogenesis has traditionally been carried out by excision of affected tissues with subsequent immunohistological examination. Excision-based histology provides a limited two-dimensional presentation of tissue morphology at the cost of halting disease progression at a single time point and(More)