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Biviano Angelo B AB Cardiology Division, Department of Medicine, Columbia University College of Physicians and Surgeons, New York, New York, USA. - - 2011
Atrial fibrillation (AF) activation rates have been calculated using both frequency domain and time complex analyses. Direct comparisons of these methods are limited. We report: (1) their correlation when measuring AF activation rates, (2) comparisons of recording durations required to minimize variability, and (3) differences in the temporal reproducibility. AF ...
Sakamoto Takashi - - 2011
The medical charts of 41 ears with congenital middle ear malformation with both an intact external ear canal and a mobile stapes footplate were reviewed retrospectively to study the Carhart effect. The operations were categorized as successful or unsuccessful according to the extent of decrease in the average air-bone gap. ...
Ishida Ieda M - - 2011
OBJECTIVE:: Auditory steady state responses (ASSRs) to multiple air conduction (AC) stimuli modulated at ∼80 Hz have been shown to provide reasonable estimates of the behavioral audiogram. To distinguish the type of hearing loss (i.e., conductive, sensorineural, or mixed), bone conduction (BC) results are necessary. There are few BC-ASSR data, ...
Kristjánsson Arni - - 2011
Many have argued that effects of adaptation, such as aftereffects from motion or tilt, reflect that the visual system hones its responses in on the characteristics of the adapting stimulus. This view entails that on average, the discrimination of the characteristics of an adapting stimulus should become easier as viewing ...
Tripovich J S - - 2011
Toneburst-evoked auditory brainstem responses (ABRs) were recorded in a captive subadult male leopard seal. Three frequencies from 1 to 4 kHz were tested at sound levels from 68 to 122 dB peak equivalent sound pressure level (peSPL). Results illustrate brainstem activity within the 1-4 kHz range, with better hearing sensitivity ...
Lee Yongku - - 2011
The purpose of the study was to investigate how novice runners adjust their lower extremities in heel-toe running while they wear dress shoes and running shoes. Ten novice male runners repeatedly ran across a force plate at 4 m/s in each type of shoes. Joint kinematics and kinetics, vertical ground ...
Wilson Maria - - 2011
Toothed whales emit high-powered ultrasonic clicks to echolocate a wide range of prey. It may be hypothesized that some of their prey species have evolved capabilities to detect and respond to such ultrasonic pulses in a way that reduces predation, akin to the situation for many nocturnal insects and echolocating ...
Ramma Lebogang - - 2011
South African Premier Soccer League (PSL) matches are known worldwide as some of the noisiest recreational events. Therefore, the objectives of this study were to i) measure noise levels during different PSL matches; ii) measure changes in auditory function after attending PSL matches; and iii) determine the factors that increase ...
Henry Molly J - - 2011
In three experiments, we considered the relative contribution of frequency change (Δf) and time change (Δt) to perceived velocity (Δf/Δt) for sounds that moved either continuously in frequency space (Experiment 1) or in discrete steps (Experiments 2 and 3). In all the experiments, participants estimated "how quickly stimuli changed in ...
Morisaka Tadamichi - - 2011
Field recordings of echolocation signals produced by Heaviside's dolphins (Cephalorhynchus heavisidii) were made off the coast of South Africa using a hydrophone array system. The system consisted of three hydrophones and an A-tag (miniature stereo acoustic data-logger). The mean centroid frequency was 125 kHz, with a -3 dB bandwidth of ...
Wilson Richard H - - 2011
Background: Pure-tone, air-conduction audiograms notched at 4000 Hz have long been considered the signature configuration for noise-induced hearing loss even though there is an extensive literature that does not mesh with this simple explanation. There are many reports of notched audiograms from individuals with no history of noise exposure and, conversely, ...
Plack Christopher J CJ Human Communication and Deafness Division, University of Manchester, Manchester, M13 9PL, United Kingdom. - - 2011
Frequency difference limens (FDLs) were measured for Huggins pitch (HP) stimuli, consisting of a 30-Hz wide band of interaurally decorrelated noise in a diotic low-pass noise and for 30-Hz wide bands of diotic narrowband noise presented in a diotic low-pass noise background. FDLs at a 400-ms duration for the two ...
Schindel Ryan - - 2011
When a unique "oddball" stimulus is embedded in a train of repeated standard stimuli, its duration can seem relatively exaggerated (V. Pariyadath & D. Eagleman, 2007; P. U. Tse, J. Intriligator, J. Rivest, & P. Cavanagh, 2004). We explored the possibility of a link between this and signal intensity reductions ...
Dees Elise W - - 2011
Parafoveal function is important for daily visual tasks such as reading. Here the variability in cone density along the four cardinal meridians in parafoveal regions of the retina was investigated in vivo using an adaptive optics fundus camera. Ten healthy normal trichromatic individuals were included in the study. There were ...
Anstis Stuart - - 2011
Four pairs of spots rotating around their common centers, each pair a "doublet", were arranged in a square formation. The doublets initially appear to rotate "locally", but then coalesce into two large squares that slide over each other along circular paths ("global" motion). This perceptual transition from local to global ...
Terrier Romain - - 2011
Rapid discrete goal-directed movements are characterized by a well known coordination pattern between the gaze and the hand displacements. The gaze always starts prior to the hand movement and reaches the target before hand velocity peak. Surprisingly, the effect of the target size on the temporal gaze-hand coordination has not ...
Gao Chao - - 2011
A mechanically switchable bistable [1]rotaxane, constituted of azobenzene modified cyclodextrins (CyDs) and a Schiff base bridged by a metallosalen unit, was designed and synthesized. (1)H NOESY NMR and ICD spectra were investigated to characterize the movement process of this stretch-contraction supramolecular system. The geometries of [1]rotaxane before and after irradiation ...
Dicpinigaitis Peter V - - 2010
BACKGROUND: Recently, interest has emerged in the sensation of irritation that precedes the motor act of coughing; this phenomenon has been termed the urge-to-cough (UTC). Although one previous study has demonstrated a transient enhancement of cough reflex sensitivity during acute upper respiratory tract infection (URI), the effect of URI on ...
Douillard Samuel - - 2011
Singlet oxygen ((1)O(2)), produced during photodynamic therapy, deactivates during its interaction with tissues by producing reactive oxygen species (ROS) and peroxides as well as other degradation products. Here we investigated the role of parameters of light delivery, O(2), and temperature on the ROS and peroxides production, secondary to (1)O(2). A ...
Castelain Mickaël - - 2010
Uropathogenic Escherichia coli (UPEC) express various kinds of organelles, so-called pili or fimbriae, that mediate adhesion to host tissue in the urinary tract through specific receptor-adhesin interactions. The biomechanical properties of these pili have been considered important for the ability of bacteria to withstand shear forces from rinsing urine flows. ...
Thomas Stephen J - - 2010
HYPOTHESIS: We hypothesized that posterior capsule thickness (PCT) would be greater on the dominant arm compared to the non-dominant arm. We also hypothesized that PCT would negatively correlate with glenohumeral internal rotation and scapular upward rotation. In addition, PCT would positively correlate with glenohumeral external rotation. However, currently PCT has ...
Denzer W - - 2011
Cavity enhanced absorption measurements have been made of several species that absorb light between 1.5 and 1.7 µm using both a supercontinuum source and superluminescent light emitting diodes. A system based upon an optical enhancement cavity of relatively high finesse, consisting of mirrors of reflectivity ∼99.98%, and a Fourier transform ...
Stephenson Daniel R - - 2010
HYPOTHESIS: Reverse shoulder arthroplasty is growing in popularity for patients with deficient rotator cuffs; however, the phenomenon of scapular notching continues to be a concern. This study examined the effects of humeral component version in the Aequalis Reversed Shoulder Prosthesis (Tornier, Edina, MN) on impingement of the humeral prosthesis against ...
Lee Minju - - 2010
The synergistic effect of H(2)O(2) production and sonochemiluminescence (SCL) was studied under both orthogonal and opposite dual irradiation at the frequencies of 28, 584 and 970kHz and at various acoustic powers. The largest reduction in H(2)O(2) production was observed under opposite dual irradiation at a 28/28kHz frequency without considering the ...
Xue Y N - - 2011
Polycrystalline LaBSiO(5):Eu(3+),R(3+) (R=Bi or Sm) phosphors have been synthesized by a facile sol-gel method. The phosphors have been characterized by thermogravimetric analysis/different scanning calorimeter, scanning electron microscopy, X-ray diffractometer and fluorescence measurements. It was found that the emission intensity of LaBSiO(5):Eu phosphors increases clearly and reaches a maximum at 30mol% ...
Vinay S N SN Department of Electronics and Telecommunications, Acoustics Research Center, Norwegian University of Science and Technology, OS Bragstads plass 2B, Norway-7491 Trondheim, Norway. - - 2010
Measures of auditory performance were compared for an experimental group who listened regularly to music via personal music players (PMP) and a control group who did not. Absolute thresholds were similar for the two groups for frequencies up to 2 kHz, but the experimental group had slightly but significantly higher ...
Alexander Joshua M - - 2010
The auditory system calibrates to reliable properties of a listening environment in ways that enhance sensitivity to less predictable (more informative) aspects of sounds. These reliable properties may be spectrally local (e.g., peaks) or global (e.g., gross tilt), but the time course over which the auditory system registers and calibrates ...
Dils Alexia Toskos - - 2010
When we hear a story, do we naturally imagine the visual scene being described? Do the representations derived in the course of normal language comprehension interact with visual perception broadly? For example, might understanding language change how we interpret visual scenes, even when the visual scenes are unrelated to the ...
Féron François-Xavier - - 2010
Three experiments are reported, which investigated the auditory velocity thresholds beyond which listeners are no longer able to perceptually resolve a smooth circular trajectory. These thresholds were measured for band-limited noises, white noise, and harmonic sounds (HS), and in different acoustical environments. Experiments 1 and 2 were conducted in an ...
Wagner Herbert - - 2010
The aims of the present study were: (1) to compare the differences in the ball release speed and throwing accuracy between the ABOVE and SIDE throw; (2) to analyze kinematic differences of these two throwing techniques; and (3) to give practical applications to team handball coaches and players. Ball release ...
Ernst Stephan M A SM Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge CB2 3EB, United Kingdom. - - 2010
Frequency modulation detection limens (FMDLs) were measured for carrier frequencies (f(c)) of 1000, 4000, and 6000 Hz, using modulation frequencies (f(m)) of 2 and 10 Hz and levels of 20 and 60 dB sensation level (SL), both with and without random amplitude modulation (AM), applied in all intervals of a ...
Jurado Carlos C Section of Acoustics, Department of Electronic Systems, Aalborg University, Fredrik Bajersvej 7-A, Denmark. - - 2010
Auditory filter shapes were derived for signal frequencies (f(s)) between 50 and 1000 Hz, using the notched-noise method. The masker spectrum level (N(0)) was 50 dB (re 20 μPa). For f(s) = 63 and 50 Hz, measurements were also made with N(0) = 62 dB for the lower band. The ...
Josev Elisha K - - 2011
This study explored the mechanisms that underlie asymmetries for the horizontal vertical illusion (HVI), which deceives length perception, so that a vertical line is perceived as longer than a horizontal line of equivalent length. In Experiment 1, university students (n = 14) made length judgements for vertical and horizontal lines. The vertical ...
Berghoff Bork Ansgar - - 2011
Roseobacter clade aerobic anoxygenic phototrophic bacteria (AAnP) are abundant in photic zone environments of marine ecosystems. These bacteria form a photosynthetic apparatus at oxygen saturation, a situation expected to generate high levels of singlet oxygen ((1) O(2) ) when light is present. Rhodobacter sphaeroides, an anaerobic anoxygenic phototroph, represses photosynthesis ...
Ishikawa Kumiko - - 2011
The purpose of this study was to establish optimal conditions for recording multifocal visual evoked potentials (mVEPs) in Japanese individuals, whose skull frame presumably differs from Caucasians. The scalp point that was extended from the calcarine fissure was identified using magnetic resonance imaging scans of 200 subjects. MVEPs were recorded ...
Bertolini G - - 2011
Self-motion perception after a sudden stop from a sustained rotation in darkness lasts approximately as long as reflexive eye movements. We hypothesized that, after an angular velocity step, self-motion perception and reflexive eye movements are driven by the same vestibular pathways. In 16 healthy subjects (25-71 years of age), perceived ...
Bezerra Raquel Pedrosa - - 2011
Semicontinuous cultures were carried out at different dilution rates (D) and light intensities (I) to determine the maximum productivity of Arthrospira platensis cultivated in helicoidal photobioreactor up to the achievement of pseudo-steady-state conditions. At I=108 μmol photons m(-2) s(-1), the semicontinuous regime ensured the highest values of maximum cell concentration ...
Hallman Jason J JJ Department of Biomedical Engineering, Marquette University 9200 W. Wisconsin Avenue, Milwaukee, WI 53226, USA. - - 2010
This study characterized thoracoabdominal response to posterolateral loading from a seat-mounted side airbag. Seven unembalmed post-mortem human subjects were exposed to ten airbag deployments. Subjects were positioned such that the deploying airbag first contacted the posterolateral thorax between T6 and L1 while stationary (n = 3 x 2 aspects) or ...
Kaeser Pierre-François - - 2010
To report a series of patients with cerebellar dysfunction and altered vision during motion, and to quantify their visual impairment in motion with a simple clinical test. Twenty consecutive patients suffering from cerebellar dysfunction and altered vision during motion were examined between 1994 and 2007. A control group consisted of ...
Crisco Joseph J - - 2010
Measuring head impact exposure is a critical step toward understanding the mechanism and prevention of sport-related mild traumatic brain (concussion) injury, as well as the possible effects of repeated subconcussive impacts. To quantify the frequency and location of head impacts that individual players received in 1 season among 3 collegiate ...
Chiang Chang-Ling - - 2010
Before switching totally to alternative fuel stage, CO(2) mitigation process has considered a transitional strategy for combustion of fossil fuels inevitably. In comparison to other CO(2) mitigation options, such as oceanic or geologic injection, the biological photosynthetic process would present a far superior and sustainable solution under both environmental and ...
Goonetilleke Samanthi C - - 2010
The countermanding (or stop-signal) task, which requires the cancellation of an impending response on the infrequent presentation of a stop signal, enables study of the contextual control of movement generation and suppression. Here we present a novel and empirical measure of the time needed to cancel an impending gaze shift ...
St George Rebecca J - - 2011
The sense of orientation during locomotion is derived from our spatial relationship with the external environment, sensed predominantly by sight and sound, and from internal signals of motion, generated by the vestibular sense and the pattern of efferent and afferent signals to the muscles and joints. The sensory channels operate ...
Xiao Ming - - 2010
OBJECTIVE: Objectives of this study were to investigate the motions of Volvo's Whiplash Protection System (WHIPS) seat and occupant during simulated rear crashes of a human model of the neck (HUMON). METHODS: HUMON consisted of a human neck specimen (n = 6) mounted to the torso of BioRID II and ...
Mian Omar S OS Sobell Department of Motor Neuroscience and Movement Disorders, University College London Institute of Neurology, Queen Square, London WC1N 3BG, UK. - - 2010
Passing current through mastoid electrodes (conventionally termed galvanic vestibular stimulation; GVS) evokes a balance response containing a short- and a medium-latency response. The origins of these two responses are debated. Here we test the hypotheses that they originate from net signals evoked by stimulation of otolith and semi-circular canal afferents, ...
Santarcangelo E L EL Department of Physiological Sciences, University of Pisa, Via San Zeno 31, Pisa, Italy. - - 2010
Previous studies showed that highly hypnotizable persons imagining a specific sensory context behave according to the corresponding real stimulation and perceive their behaviour as involuntary. The aim of the study was to confirm the hypothesis of a translation of sensory imagery into real perception and, thus, of a true involuntary ...
Davison Michael - - 2010
Four pigeons were trained on two-key concurrent variable-interval schedules with no changeover delay. In Phase 1, relative reinforcers on the two alternatives were varied over five conditions from .1 to .9. In Phases 2 and 3, we instituted a molar feedback function between relative choice in an interreinforcer interval and ...
Hiruma Kiyoshi - - 2011
We encountered patients who had static direction-changing positional nystagmus (DCPN) canceled at about 20-30° yaw head rotation from the supine position. This nystagmus was also canceled when the head was rotated 180° from this position. We termed these head positions neutral points. The positional nystagmus observed (except at the neutral ...
Zheng Xiujun - - 2010
Prospective cohort evaluation of C7 plumb line (C7PL) and gravity line (GL) in different standing positions in asymptomatic volunteers. To evaluate the repeatability of C7PL and GL in different standing positions using an optical method. Both C7PL and GL have been used to assess spinal balance. However, due to extensive ...
Brokesová Johana - - 2010
A new mechanical sensor system for recording the rotation of ground velocity has been constructed. It is based on measurements of differential motions between paired sensors mounted along the perimeter of a rigid (undeformable) disk. The elementary sensors creating the pairs are sensitive low-frequency geophones currently used in seismic exploration ...
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