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https://www.readbyqxmd.com/read/28727564/causal-inference-on-multidimensional-data-using-free-probability-theory
#1
Furui Liu, Lai-Wan Chan
In this paper, we deal with the problem of inferring causal relations for multidimensional data. Based on the postulate that the distribution of the cause and the conditional distribution of the effect given cause are generated independently, we show that the covariance matrix of the mean embedding of the cause in reproducing kernel Hilbert space (RKHS) is free independent with the covariance matrix of the conditional embedding of the effect given cause. This, called freeness condition, induces a cause-effect asymmetry that a designed measurement is $0$ in the causal direction but smaller than $0$ in the anticausal direction, and it uncovers the causal direction...
July 18, 2017: IEEE Transactions on Neural Networks and Learning Systems
https://www.readbyqxmd.com/read/28726370/ultra-stretchable-analog-digital-signal-transmission-line-with-carbon-nanotube-sheets
#2
Yourack Lee, Min-Kyu Joo, Viet Thong Le, Raquel Ovalle-Robles, Xavier Lepró, Márcio D Lima, Daniel G Suh, Han Young Yu, Young Hee Lee, Dongseok Suh
Stretchable conductors can be used in various applications depending on their own characteristics. Here, we demonstrate simple and robust elastomeric conductors that are optimized for stretchable electrical signal transmission line. They can withstand strains up to 600% without any substantial change in their resistance (≤ 10% as is and ≤ 1% with passivation), and exhibit suppressed charge fluctuations in the medium. The inherent elasticity of a polymeric rubber and the high conductivity of flexible, highly oriented carbon nanotube sheets were combined synergistically, without losing both properties...
July 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28724501/noise-exposure-alters-long-term-neural-firing-rates-and-synchrony-in-primary-auditory-and-rostral-belt-cortices-following-bimodal-stimulation
#3
Joseph D Takacs, Taylor J Forrest, Gregory J Basura
We previously demonstrated that bimodal stimulation (spinal trigeminal nucleus [Sp5] paired with best frequency tone) altered neural tone-evoked and spontaneous firing rates (SFRs) in primary auditory cortex (A1) 15 min after pairing in guinea pigs with and without noise-induced tinnitus. Neural responses were enhanced (+10 ms) or suppressed (0 ms) based on the bimodal pairing interval. Here we investigated whether bimodal stimulation leads to long-term (up to 2 h) changes in tone-evoked and SFRs and neural synchrony (correlate of tinnitus) and if the long-term bimodal effects are altered following noise exposure...
July 13, 2017: Hearing Research
https://www.readbyqxmd.com/read/28723602/tinnitus-anxiety-depression-and-substance-abuse-in-rock-musicians-a-norwegian-survey
#4
Carl Christian Lein Stormer, Tore Sorlie, Niels Christian Stenklev
OBJECTIVE: Rock musicians are known to have an increased prevalence of hearing loss and tinnitus. The aims of the present study were to examine the distribution of anxiety and depression symptoms among rock musicians with or without tinnitus and how these mental health indicators and internal locus of control influenced upon their tinnitus symptom concerns and the degree to which the tinnitus affected their lives. DESIGN: The study was a questionnairebased cross-sectional survey of subjects selected from a cohort of rock musicians...
June 1, 2017: International Tinnitus Journal
https://www.readbyqxmd.com/read/28723149/cyclewise-operation-of-printed-mos2-transistor-biosensors-for-rapid-biomolecule-quantification-at-femtomolar-levels
#5
Byunghoon Ryu, Hongsuk Nam, Bo-Ram Oh, Yujing Song, Pengyu Chen, Younggeun Park, Wenjie Wan, Katsuo Kurabayashi, Xiaogan Liang
Field-effect transistors made from MoS2 and other emerging layered semiconductors have been demonstrated to be able to serve as ultrasensitive biosensors. However, such nanoelectronic sensors still suffer seriously from a series of challenges associated with the poor compatibility between electronic structures and liquid analytes. These challenges hinder the practical biosensing applications that demand rapid, low-noise, highly specific biomolecule quantification at femtomolar levels. To address such challenges, we study a cyclewise process for operating MoS2 transistor biosensors, in which a series of reagent fluids are delivered to the sensor in a time-sequenced manner and periodically set the sensor into four assay-cycle stages, including incubation, flushing, drying, and electrical measurement...
February 24, 2017: ACS Sensors
https://www.readbyqxmd.com/read/28722201/susceptibility-induced-distortion-correction-in-hyperpolarized-echo-planar-imaging
#6
Jack J Miller, Angus Z Lau, Damian J Tyler
PURPOSE: Echo planar imaging is an attractive rapid imaging readout that can image hyperpolarized compounds in vivo. By alternating the sign of the phase encoding gradient waveform, spatial offsets arising from uncertain frequency shifts can be determined. We show here that blip-reversed echo planar imaging can also be used to correct for susceptibility and B0 inhomogeneity effects that would otherwise produce image-domain distortion in the heart. METHODS: Previously acquired blip-reversed cardiac 3D-Spectral-Spatial echo planar imaging volumetric timecourses of hyperpolarized [1-(13) C]pyruvate were distortion corrected by a deformation field estimated by reconstructing signal-to-noise ratio (SNR)-weighted progressively subsampled temporally summed images of each metabolite...
July 19, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28716314/safety-and-efficacy-of-ebselen-for-the-prevention-of-noise-induced-hearing-loss-a-randomised-double-blind-placebo-controlled-phase-2-trial
#7
Jonathan Kil, Edward Lobarinas, Christopher Spankovich, Scott K Griffiths, Patrick J Antonelli, Eric D Lynch, Colleen G Le Prell
BACKGROUND: Noise-induced hearing loss is a leading cause of occupational and recreational injury and disease, and a major determinant of age-related hearing loss. No therapeutic agent has been approved for the prevention or treatment of this disorder. In animal models, glutathione peroxidase 1 (GPx1) activity is reduced after acute noise exposure. Ebselen, a novel GPx1 mimic, has been shown to reduce both temporary and permanent noise-induced hearing loss in preclinical studies. We assessed the safety and efficacy of ebselen for the prevention of noise-induced hearing loss in young adults in a phase 2 clinical trial...
July 14, 2017: Lancet
https://www.readbyqxmd.com/read/28716312/ethical-considerations-in-noise-induced-hearing-loss-research
#8
Stéphane F Maison, Steven D Rauch
No abstract text is available yet for this article.
July 14, 2017: Lancet
https://www.readbyqxmd.com/read/28712672/noise-induced-cochlear-synaptopathy-in-rhesus-monkeys-macaca-mulatta
#9
M D Valero, J A Burton, S N Hauser, T A Hackett, R Ramachandran, M C Liberman
Cochlear synaptopathy can result from various insults, including acoustic trauma, aging, ototoxicity, or chronic conductive hearing loss. For example, moderate noise exposure in mice can destroy up to ∼50% of synapses between auditory nerve fibers (ANFs) and inner hair cells (IHCs) without affecting outer hair cells (OHCs) or thresholds, because the synaptopathy occurs first in high-threshold ANFs. However, the fiber loss likely impairs temporal processing and hearing-in-noise, a classic complaint of those with sensorineural hearing loss...
July 8, 2017: Hearing Research
https://www.readbyqxmd.com/read/28711622/prolonged-low-level-noise-induced-plasticity-in-the-peripheral-and-central-auditory-system-of-rats
#10
Adam M Sheppard, Guang-Di Chen, Senthilvelan Manohar, Dalian Ding, Bo-Hua Hu, Wei Sun, Jiwie Zhao, Richard Salvi
Prolonged low-level noise exposure alters loudness perception in humans, presumably by decreasing the gain of the central auditory system. Here we test the central gain hypothesis by measuring the acute and chronic physiologic changes at the level of the cochlea and inferior colliculus (IC) after a 75 dB SPL, 10-20 kHz noise exposure for 5 weeks. The compound action potential (CAP) and summating potential (SP) were used to assess the functional status of the cochlea and 16 channel electrodes were used to measure the local field potentials (LFP) and multi-unit spike discharge rates (SDR) from the IC immediately after and one-week post-exposure...
July 12, 2017: Neuroscience
https://www.readbyqxmd.com/read/28709880/low-intensity-transcranial-electric-stimulation-safety-ethical-legal-regulatory-and-application-guidelines
#11
REVIEW
A Antal, I Alekseichuk, M Bikson, J Brockmöller, A R Brunoni, R Chen, L G Cohen, G Dowthwaite, J Ellrich, A Flöel, F Fregni, M S George, R Hamilton, J Haueisen, C S Herrmann, F C Hummel, J P Lefaucheur, D Liebetanz, C K Loo, C D McCaig, C Miniussi, P C Miranda, V Moliadze, M A Nitsche, R Nowak, F Padberg, A Pascual-Leone, W Poppendieck, A Priori, S Rossi, P M Rossini, J Rothwell, M A Rueger, G Ruffini, K Schellhorn, H R Siebner, Y Ugawa, A Wexler, U Ziemann, M Hallett, W Paulus
Low intensity transcranial electrical stimulation (TES) in humans, encompassing transcranial direct current (tDCS), transcutaneous spinal Direct Current Stimulation (tsDCS), transcranial alternating current (tACS), and transcranial random noise (tRNS) stimulation or their combinations, appears to be safe. No serious adverse events (SAEs) have been reported so far in over 18,000 sessions administered to healthy subjects, neurological and psychiatric patients, as summarized here. Moderate adverse events (AEs), as defined by the necessity to intervene, are rare, and include skin burns with tDCS due to suboptimal electrode-skin contact...
June 19, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28709323/noise-induced-stabilization-of-collective-dynamics
#12
Pau Clusella, Antonio Politi
We illustrate a counterintuitive effect of an additive stochastic force, which acts independently on each element of an ensemble of globally coupled oscillators. We show that a very small white noise not only broadens the clusters, wherever they are induced by the deterministic forces, but can also stabilize a linearly unstable collective periodic regime: self-consistent partial synchrony. With the help of microscopic simulations we are able to identify two noise-induced bifurcations. A macroscopic analysis, based on a perturbative solution of the associated nonlinear Fokker-Planck equation, confirms the numerical studies and allows determining the eigenvalues of the stability problem...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28709231/output-only-parameter-identification-of-a-colored-noise-driven-van-der-pol-oscillator-thermoacoustic-instabilities-as-an-example
#13
Giacomo Bonciolini, Edouard Boujo, Nicolas Noiray
The problem of output-only parameter identification for nonlinear oscillators forced by colored noise is considered. In this context, it is often assumed that the forcing noise is white, since its actual spectral content is unknown. The impact of this white-noise forcing assumption upon parameter identification is quantitatively analyzed. First, a Van-der-Pol oscillator forced by an Ornstein-Uhlenbeck process is considered. Second, the practical case of thermoacoustic limit cycles in combustion chambers with turbulence-induced forcing is investigated...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28709193/escape-routes-weak-links-and-desynchronization-in-fluctuation-driven-networks
#14
Benjamin Schäfer, Moritz Matthiae, Xiaozhu Zhang, Martin Rohden, Marc Timme, Dirk Witthaut
Shifting our electricity generation from fossil fuel to renewable energy sources introduces large fluctuations to the power system. Here, we demonstrate how increased fluctuations, reduced damping, and reduced intertia may undermine the dynamical robustness of power grid networks. Focusing on fundamental noise models, we derive analytic insights into which factors limit the dynamic robustness and how fluctuations may induce a system escape from an operating state. Moreover, we identify weak links in the grid that make it particularly vulnerable to fluctuations...
June 2017: Physical Review. E
https://www.readbyqxmd.com/read/28708404/graphene-enhanced-brillouin-optomechanical-microresonator-for-ultra-sensitive-gas-detection
#15
Baicheng Yao, Caibin Yu, Yu Wu, Shu-Wei Huang, Han Wu, Yuan Gong, Yuanfu Chen, Yanrong Li, Chee Wei Wong, Xudong Fan, Yunjiang Rao
Chemical sensing is one of the most important applications of nanoscience, whose ultimate aim is to seek higher sensitivity. In recent years, graphene with intriguing quantum properties has spurred dramatic advances ranging from materials science to optoelectronics and mechanics, showing its potential to realize individual molecule solid-state sensors. However, for optical sensing, the single atom thickness of graphene greatly limits the light-graphene interaction, bottlenecking their performances. Here we demonstrate a novel approach based on the forward phase-matched Brillouin optomechanics in a graphene inner-deposited high Q (> 2×106) microfluidic resonator, expanding the 'electron-photon' interaction in conventional graphene optical devices to the 'electron-phonon-photon' process...
July 14, 2017: Nano Letters
https://www.readbyqxmd.com/read/28708180/4d-spatiotemporal-evolution-of-combustion-intermediates-in-turbulent-flames-using-burst-mode-volumetric-laser-induced-fluorescence
#16
Benjamin R Halls, Naibo Jiang, Terrence R Meyer, Sukesh Roy, Mikhail N Slipchenko, James R Gord
High-speed (20 kHz rate), volumetric laser-induced-fluorescence imaging of combustion intermediates such as a formaldehyde (CH<sub>2</sub>O) and polycyclic aromatic hydrocarbon (PAH) species is demonstrated for tracking the four-dimensional (4D) evolution of turbulent flames. The third-harmonic, 355 nm output of a burst-mode Nd:YAG laser with a 130 mJ/pulse is expanded to 30 mm diameter for volume illumination of the base region of a methane-hydrogen jet diffusion flame. Eight simultaneous images from different viewing angles are used to collect the resulting fluorescence signal for reconstruction of 200 time-sequential three-dimensional volumes over 10 ms duration...
July 15, 2017: Optics Letters
https://www.readbyqxmd.com/read/28706081/brief-stimulus-exposure-fully-remediates-temporal-processing-deficits-induced-by-early-hearing-loss
#17
David B Green, Michelle M Mattingly, Yi Ye, Jennifer D Gay, Merri J Rosen
In childhood, partial hearing loss can produce prolonged deficits in speech perception and temporal processing. Early therapeutic interventions targeting temporal processing may improve later speech-related outcomes, however. Gap detection is a measure of auditory temporal resolution that relies on auditory cortex (ACx), and early auditory deprivation alters intrinsic and synaptic properties in ACx. Thus, early deprivation should induce deficits in gap detection, which should be reflected in ACx gap sensitivity...
July 13, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28705607/noise-induced-hearing-loss-induces-loudness-intolerance-in-a-rat-active-sound-avoidance-paradigm-asap
#18
Senthilvelan Manohar, Jaclyn Spoth, Kelly Radziwon, Benjamin D Auerbach, Richard Salvi
Hyperacusis is a loudness hypersensitivity disorder in which moderate-intensity sounds are perceived as extremely loud, aversive and/or painful. To assess the aversive nature of sounds, we developed an Active Sound Avoidance Paradigm (ASAP) in which rats altered their place preference in a Light/Dark shuttle box in response to sound. When no sound (NS) was present, rats spent more than 95% of the time in the Dark Box versus the transparent Light Box. However, when a 60 or 90 dB SPL noise (2-20 kHz, 2-8 kHz, or 16-20 kHz bandwidth) was presented in the Dark Box, the rats'' preference for the Dark Box significantly decreased...
July 8, 2017: Hearing Research
https://www.readbyqxmd.com/read/28704890/analysis-of-subway-interior-noise-at-peak-commuter-time
#19
Donguk Lee, Gibbeum Kim, Woojae Han
BACKGROUND AND OBJECTIVES: Although mass transit systems are convenient and efficient for urban people, little attention has been paid to the potential hearing hazard from their noise. The purpose of the current study was to measure and analyze levels of subway interior noise at peak commuter times and to provide information about commuters' daily dose of noise exposure. MATERIALS AND METHODS: To measure the subway interior noise, nine subway lines inside Seoul (i...
July 2017: Journal of Audiology & Otology
https://www.readbyqxmd.com/read/28704075/arecoline-cannot-alter-testicular-dysfunction-and-pineal-activation-caused-by-noise-in-wistar-rat
#20
Indraneel Saha, Aniruddha Chatterjee, Urmi Chatterji, B R Maiti
Millions of people consume betel nut for increased capacity to work and for stress reduction. The nut contains arecoline, which has multiple side effects on endocrine functions. Objective of the work is to investigate pineal-testicular responses to noise and after arecoline treatment in noise in rats. Noise exposure (100 dB, 6 h daily, 10 days) caused pineal stimulation ultrastructurally and at indoleamines level. Leydig cell dysfunction with fall of testosterone level and suppression of sex accessories were noticed...
July 13, 2017: Archives of Physiology and Biochemistry
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