23 papers · ranked by Valyu relevance
Brian C. J. Moore
Some of the problems experienced by users of hearing aids (HAs) when listening to music are relevant to cochlear implants (CIs). One problem is related to the high peak levels (up to 120 dB SPL) that occur in live music. Some HAs and CIs overload at such levels, because of the limited dynamic range of the microphones…
Andy H. Hung, Taiyang Liang, Preeti A. Sukerkar, Thomas J. Meade + 1 more
'Noam Harel'] Purpose To minimize feature loss in T1- and T2-weighted MRI by merging multiple MR images acquired at different TR and TE to generate an image with increased dynamic range. Materials and Methods High Dynamic Range (HDR) processing techniques from the field of photography were applied to a series of…
Robert G Rasmussen, Andrew Schwartz, Steven M Chase, Eilon Vaadia
Neural populations from various sensory regions demonstrate dynamic range adaptation in response to changes in the statistical distribution of their input stimuli. These adaptations help optimize the transmission of information about sensory inputs. Here, we show a similar effect in the firing rates of primary motor…
Daniel F. Nino, Joshua N. Milstein
In recent years, there have been significant advances in quantifying molecule copy number and protein stoichiometry with single-molecule localization microscopy (SMLM). However, as the density of fluorophores per diffraction-limited spot increases, distinguishing between detection events from different fluorophores…
Jie Yang, Ziyi Liu, Ulian Shahnovich, Orly Yadid-Pecht
—In this paper, we present a novel tone mapping algorithm that can be used for displaying wide dynamic range (WDR) images on low dynamic range (LDR) devices. The proposed algorithm is mainly motivated by the logarithmic response and local adaptation features of the human visual system (HVS). HVS perceives luminance…
Amish Patel, Xingjian Zhong, Mallory Moffett, Yidan Sun + 1 more
While shortwave infrared (SWIR) imaging provides superior tissue penetration and reduced autofluorescence for preclinical applications, quantitative fluorescence analysis is hindered by the limited dynamic range of InGaAs cameras, forcing a focus on either bright or dim anatomical features. We develop a high dynamic…
Minho Lee, Min-Woong Seo, Juyeong Kim, Keita Yasutomi + 3 more
'Keiichiro Kagawa' 'Jang-Kyoo Shin' 'Shoji Kawahito'] In this paper, a wide dynamic range (WDR) CMOS image sensor (CIS) with a charge splitting gate (SG) and two storage diodes (SDs) is presented. By using single-gate on/off control with the SG, photocurrent path to the first (SD1) or second storage diodes (SD2) is…
Chou P Hung, Chloe Callahan-Flintoft, Paul D Fedele, Kim F Fluitt + 6 more
Luminance can vary widely when scanning across a scene, by up to 10^9 to 1, requiring multiple normalizing mechanisms spanning from the retina to cortex to support visual acuity and recognition. Vision models based on standard dynamic range luminance contrast ratios below 100 to 1 have limited ability to generalize to…
Vasile Pătrașcu
- In this paper we use a logarithmic model for gray level image enhancement. We begin with a short presentation of the model and then, we propose a new formula for the mean dynamic range. After that we present two image transforms: one performs an optimal enhancement of the mean dynamic range using the logarithmic…
Marc René Schädler
Background: The effect of hearing impairment on speech perception was described by Plomp (1978) as a sum of a loss of class A, due to signal attenuation, and a loss of class D, due to signal distortion. While a loss of class A can be compensated by linear amplification, a loss of class D, which severely limits the…
Hiroichi Yoshida, Yuzhi Chen, Wilson S Geisler, Eyal Seidemann
The dynamic range of contrast-encoding in the early visual system has been investigated at both single-neuron and population levels in animals using oriented stimuli such as gratings and Gabor patches. However, contrast-encoding of unoriented stimuli such as Gaussians has been less explored, even though such stimuli…
Sharon S. Newman, Brandon D. Wilson, Daniel Mamerow, Benjamin Wollant + 5 more
Precision medicine requires highly scalable methods of multiplexed biomarker quantification that can accurately describe patient physiology. Unfortunately, contemporary molecular detection methods are generally limited to a dynamic range of sensitivity spanning just 3–4 orders of magnitude, whereas the actual…
Ryan M. Corey, Andrew C. Singer
Hearing aids use dynamic range compression (DRC), a form of automatic gain control, to make quiet sounds louder and loud sounds quieter. Compression can improve listening comfort, but it can also cause distortion in noisy environments. It has been widely reported that DRC performs poorly in noise, but there has been…
Jie Yang, Meng-Chen Lin, Ziyi Liu, Ulian Shahnovich + 1 more
'Orly Yadid-Pecht'] Abstract—Wide dynamic range (WDR) image tone mapping is in high demand in many applications like film production, security monitoring, and photography. It is especially crucial for mobile devices because most of the images taken today are from mobile phones, hence such technology is highly demanded…
Teeradon Phlairaharn, Ariana E. Shannon, Xinlei Zeng, Dong-Jiunn Jeffery Truong + 3 more
Orbitrap (OT) -based mass spectrometer platforms are a gold standard in high-resolution mass spectrometry, where their primary disadvantage is slower-scanning speed in comparison to time-of-flight or linear ion trap mass analyzers. In this study, we utilize long OT transients to extend the precursor dynamic range by…
Michael A Stone, Melanie Lough, Keith Wilbraham, Helen Whiston + 1 more
'Harvey Dillon'] Remote microphones (RMs) enable clearer reception of speech than would be normally achievable when relying on the acoustic sound field at the listener's ear (Hawkins, J Sp Hear Disord 49, 409-418, 1984). They are used in a wide range of environments, with one example being for children in educational…
Sumanta Pal, Nirmala Shanmugam, Mohit Kumar, Prabhu Radhakrishna
- Several schemes for gain control are used for preventing saturation of receiver, and overloading of data processor, tracker or display in pulse radars. The use of digital processing techniques open the door to a variety of digital automatic gain control schemes for analyzing digitized return signals and controlling…
Yifan Quan, Yifu Ouyang, Michael Mardini, Ravi Shankar Palani + 4 more
We propose a new mechanism for dynamic nuclear polarization that is different from the well-known Overhauser effect, solid effect, cross effect and thermal mixing processes. In particular, we discovered that the evolution of the density matrix with the simple Hamiltonian of a coupled electron-nuclear spin pair with…
Aliye Hazal Koyuncu, Jacopo Movilli, Sevil Sahin, Dmitrii V. Kriukov + 2 more
This work describes a competing activation network, which is regulated by chemical feedback at the liquid-surface interface. Feedback loops dynamically tune the concentration of chemical components in living systems, thereby controlling regulatory processes in neural, genetic, and metabolic networks. Advances in…
Authors not listed
Electrochemical impedance spectroscopy (EIS) is one of the most widely deployed methods to characterise electrochemical systems such as batteries, fuel cells or electrolyzers. The distribution of relaxation times (DRT) represents a technique to simplify EIS data by deconvolution with a suitable kernel, while with…
Stefan Diesing, Le Zhang, Eli Zysman-Colman, Ifor Samuel
Organic light-emitting diodes (OLEDs) are a revolutionary self-emitting display technology that has been successfully commercialized in mobile phones and TVs. The injected charges form both singlet and triplet excitons, and for high efficiency it is important to enable dark triplets to emit light. Currently materials…
Authors not listed
While Raman spectroscopy offers notable experimental advantages as a probe of complex mixtures, its application in practice often confronts samples that present an overwhelming fluorescence background. Here, we explore the efficacy of two particular Raman spectrometric strategies for quantitative analysis under…
Fouzia Kalim, Sivaraman Gandhi, Arati Ramesh, Sufi O. Raja + 1 more
pH dynamically regulates diverse cellular functions and processes. At the Inner Mitochondrial Membrane (IMM), nanoscale pH gradients generated by the Electron Transport Chain (ETC) play a critical role in contributing to mitochondrial membrane potential that drives ATP synthesis and thermogenesis. However, tools to…