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Results 201 - 250 of 1077
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Pravincumar Priyanka - - 2012
Living cells are subjected to external and internal mechanical stresses. The effects of these stresses on the deformation and subsequent biological response of the cells remains unclear. This study tested the hypothesis that the rate at which pressure (or stress) is applied influence the viscoelastic properties of the cell associated ...
Imaizumi Kazuya K Tokyo Healthcare University, Tokyo, Japan. - - 2012
The foot arch serves important functions related to shock absorption and the action of walking. Simple and quantitative classifications of foot arch types, such as flat feet and high arches, help to provide health support services for the elderly. To develop an evaluation system for foot arch types using foot ...
Crea S S The BioRobotics Institute, Scuola Superiore Sant’Anna, viale Rinaldo Piaggio 34, Pontedera PI, Italy. - - 2012
We present an automated segmentation method based on the analysis of plantar pressure signals recorded from two synchronized wireless foot insoles. Given the strict limits on computational power and power consumption typical of wearable electronic components, our aim is to investigate the capability of a Hidden Markov Model machine-learning method, ...
Korhonen Päivi - - 2011
Peripheral artery tonometry (PAT) is a novel method for assessing arterial stiffness of small digital arteries. Pulse pressure can be regarded as a surrogate of large artery stiffness. When ankle-brachial index (ABI) is calculated using the higher of the two ankle systolic pressures as denominator (ABI-higher), leg perfusion can be ...
Stephens Amanda N - - 2011
Anger and aggression on the road may sometimes appear unprovoked and unrelated to current driving circumstances. It is unclear whether such anger and aggression arises because of events prior to those circumstances in which anger is experienced and aggression is exhibited. In this study, time pressure and enforced following of ...
Chung-Neng Huang - - 2011
The authors developed a method for manufacturing customized insoles. It leverages advances in pressure analysis of the foot, including research on insole materials' mechanical properties and the design of insole components. Using a plan tar pressure measurement system and computer numerical control (CNC) or rapid-prototyping technology, it determines the distributed ...
Davis Andrea - - 2011
To determine the effect of clipless and toe-clipped pedals on plantar foot pressure while cycling. Seven bikers and 11 healthy volunteers were tested on a Giant ATX Team mountain bike, Tekscan Clinical 5.24 F-scan® system with an inner sole pressure sensor, a Tacx Cycle force One Turbo Trainer and a ...
Mwoyofiri T - - 2011
The anatomical structural origin of the left and right subclavian arteries is different. Could this difference translate into differences in blood pressure measurements? This was the question to be answered by this study. The experiments were done in the Department of Physiology at University of Zimbabwe-College of Health Sciences. A ...
Titze Ingo R IR Department of Communication Sciences and Disorders, The University of Iowa, Iowa City, IA 52242, USA. - - 2010
Despite the functional importance of loud, low-pitched vocalizations in big cats of the genus Panthera, little is known about the physics and physiology of the mechanisms producing such calls. We investigated laryngeal sound production in the laboratory using an excised-larynx setup combined with sound-level measurements and pressure-flow instrumentation. The larynges ...
Levine M J - - 2010
Atrial fibrillation is the most prevalent clinically relevant arrhythmia; a major cause of morbidity and hospitalization. Additionally, atrial fibrillation carries a significant risk of thrombo-embolic events, specifically cerebrovascular accident. Among the most prevalent risk factors for atrial fibrillation, hypertension not only has the strongest correlation but is also the most ...
Borch D Zangger - - 2011
This investigation aims at describing voice function of four nonclassical styles of singing, Rock, Pop, Soul, and Swedish Dance Band. A male singer, professionally experienced in performing in these genres, sang representative tunes, both with their original lyrics and on the syllable /pae/. In addition, he sang tones in a ...
Genuit Klaus - - 2010
A pair of related tools useful for environmental noise assessment are time-varying psychoacoustic loudness, and an expression of sound pressure level in dB[SPL] weighted dynamically according to the contours of equal loudness rather than the static A-weighting. Conventional weightings applicable to sound pressure (dB[A], etc.) are fixed in spectral shape ...
Hart Carl R - - 2010
Minimization of the sound pressure field within the shadow zone of a noise barrier is achieved by reducing the pressure gradient along a line, at the top of a barrier, via active noise control. The noise control effectiveness of a barrier is increased by this strategy, especially for specific system ...
Arguillat Blandine - - 2010
Direct measurements of the wavenumber-frequency spectrum of wall pressure fluctuations beneath a turbulent plane channel flow have been performed in an anechoic wind tunnel. A rotative array has been designed that allows the measurement of a complete map, 63×63 measuring points, of cross-power spectral densities over a large area. An ...
Cakmak Bülent - - 2011
The object of this study was to measure and evaluate the vibration and noise characteristics of five flap type portable harvesters using for olive harvesting and their effect on operator health during harvesting time. The vibration and sound pressure levels of different harvesters were measured at both idling and full ...
Reynolds Randall P - - 2010
The current study was performed to understand the level of sound produced by ventilated racks, animal transfer stations, and construction equipment that mice in ventilated cages hear relative to what humans would hear in the same environment. Although the ventilated rack and animal transfer station both produced sound pressure levels ...
Lepore Stephen J - - 2010
The present study builds on prior research that has examined the association between children's chronic exposure to community noise and resting blood pressure and blood pressure dysregulation during exposure to acute stressors. A novel contribution of the study is that it examines how chronic noise exposure relates to blood pressure ...
Dennis Aaron - - 2010
Right-heart catheterization is the most accurate method for measuring pulmonary artery pressure (PAP). It is an expensive, invasive procedure, exposes patients to the risk of infection, and is not suited for long-term monitoring situations. Medical researchers have shown that PAP influences the characteristics of heart sounds. This suggests that heart ...
Reinfeldt Sabine - - 2010
The relationship between the bone conduction (BC) part and the air conduction (AC) part of one's own voice has previously not been well determined. This relation is important for hearing impaired subjects as a hearing aid affects these two parts differently and thereby changes the perception of one's own voice. ...
Nawaz Syed Kashif - - 2010
The present study investigates the relationship of different sound levels with hypertension and prehypertension in Pakistani population. A cross sectional study was conducted to determine the prevalence of hypertension and prehypertension due to exposure of sound level ≤80 dBA (A weighted sound pressure level), 81-94 dBA and ≥95 dBA in ...
Katoh Chieri - - 2010
Our objective was to evaluate the value of the blowing test to measure the speech and swallowing function after resection of oral or oropharyngeal cancer. Speech and swallowing functions of the patients after surgical resection of oral or oropharyngeal cancer were assessed by a speech intelligibility test, blowing time, questionnaires, ...
Scherer Ronald C - - 2010
This study used a symmetric, three-dimensional, physical model of the larynx called M6 in which the transverse plane of the glottis is formed by sinusoidal arcs for each medial vocal fold surface, creating a maximum glottal width of 0.16 cm at the location of the minimal glottal area. Three glottal ...
Zuckerwar Allan J - - 2010
The principle of the compact nonporous windscreen is based on the great penetrability of infrasound through matter. The windscreen performance is characterized by the ratio of the sound pressure at an interior microphone, located in the center of a windscreen, to the incident sound pressure in the free field. The ...
Lin James C - - 2010
The current evolution toward greater image resolution from magnetic resonance image (MRI) scanners has prompted the exploration of higher strength magnetic fields and use of higher levels of radio frequencies (RFs). Auditory perception of RF pulses by humans has been reported during MRI with head coils. It has shown that ...
Sparano Dina M - - 2010
A 63-year-old female presented with dyspnea, leg edema, and abdominal distention. Exam revealed blood pressure of 104/58, pulse 108/min, jugular venous pressure of 8 cm, no pulsus paradoxus, a pericardial rub, muffled heart sounds, decreased basilar breath sounds, ascites, and ankle edema. Electrocardiogram showed low voltage. Imaging revealed thickened pericardium ...
Nakajima Hideko Heidi HH Department of Otology and Laryngology, Harvard Medical School, Cambridge, Massachusetts, U.S.A. - - 2010
Round window (RW) stimulation with a floating mass transducer (FMT) can be studied experimentally and optimized to enhance auditory transduction. The FMT (MED-EL Vibrant Soundbridge) has been recently implanted in patients with refractory conductive or mixed hearing loss to stimulate the RW with varying degrees of success. The mechanics of ...
Frank Matthias - - 2010
While ballistic parameters of vole captive bolt devices have been reported, there is no investigation on their hazardous potential to cause noise trauma. The aim of this experimental study was to measure the sound pressure levels of vole captive bolt devices. Two different shooting devices were examined with a modular ...
Barnard Andrew - - 2010
Sound pressure level measurements were made at Penn State (PSU) football games at Beaver Stadium, on the PSU campus, in Fall 2009. Twelve sound level meters were positioned around the field, on the press box, on the luxury suites, and outside the stadium to capture the characteristics of the crowd ...
Abbott John Paul R - - 2010
A two part project has investigated whether the pressure fluctuations (infrasonic wind noise) at the ground, as measured in an open field, can be predicted from the vertical wind velocity measured above the ground. The dominant region contributing to the pressure on the ground is calculated theoretically and displayed with ...
Neely Stephen T - - 2010
When acoustic impedance of the ear canal is known, sound pressure measured by a microphone in the ear canal can be decomposed into forward and reflected components. This decomposition provides a means to overcome problems associated with standing waves that may cause in-the-ear sound level calibration to be unreliable at ...
Bowers Link - - 2010
Modern highwall mining systems are starting to replace surface coal augers in some highwall mining operations because of their ability to increase coal production and recovery rates. Another benefit of using highwall mining systems instead of surface coal augers is the reduction in noise exposures to the affected miners extracting ...
Su Quang T - - 2010
Measured results are presented that demonstrate the use of proportional and derivative electronic feedback to improve the performance of a directional microphone. The microphone diaphragm consists of a 1 x 2 mm stiffened plate fabricated out of polycrystalline silicon that is supported on a central hinge. The sound pressure gradient ...
Hanson Helen M - - 2010
In previous work the problems of identifying final fall and estimating declination of the subglottal pressure contour were addressed [Hanson et al., J. Acoust. Soc. Am. 118, 2027 (2005); 120, 3090 (2006)]. Additional methods for identifying final fall have since been explored. These new methods will be described, and the ...
Hart Noel - - 2010
When calculating sound levels inside a building due to external sources, should some value be added to the expected sound level? ATSM E966 recommends adding 6 dB to this level. It has been theorized that this is due to pressure doubling. The effect of pressure doubling on the calculated exterior ...
Wind Jelmer - - 2010
An acoustic sensor array, which consists of pressure and particle velocity sensors, is an attractive alternative to phased pressure array because knowledge of the three dimensional (3-D) particle velocity directly characterizes the direction of the source. Hence, it is possible to localize sources in the low-frequency range, where the phase ...
Lenhardt Martin L - - 2010
A passive inexpensive hearing protection device (HPD) will be described that provides hearing protection, which is simple to use and comfortable over hours of use. Protection from impact sounds will be provided by creating a negative pressure between the plug tip and the eardrum (-100-mm H2O or -1 kPa). The ...
Woolworth David S - - 2010
This paper is a survey of typical popular live music venue sound pressure levels observed in Oxford, MS. An attempt is made to measure clarity and articulation in the venues with increasing sound pressure, and the results are correlated with previous observations of Knudsen and others. Additional analysis of challenges ...
Proctor Michael I - - 2010
A structural magnetic resonance imaging study has revealed that pharyngeal articulation varies considerably with voicing during the production of English fricatives. In a study of four speakers of American English, pharyngeal volume was generally found to be greater during the production of sustained voiced fricatives, compared to voiceless equivalents. Though ...
Lambrechts Heleen - - 2010
The contribution of the force of the lips, cheeks, and tongue is of particular interest in planning treatment. Thus, the aim of this study was to determine if there are differences in lip and tongue pressure as a function of gender, age, Angle classification, characteristics of occlusion, and oral habits. ...
Sundberg Johan - - 2010
A single female professional vocal artist and pedagogue sang examples of "twang" and neutral voice quality, which a panel of experts classified, in almost complete agreement with the singer's intentions. Subglottal pressure was measured as the oral pressure during the occlusion during the syllable /pae/. This pressure tended to be ...
Basten Tom G H - - 2010
Calibration of acoustic particle velocity sensors is still difficult due to the lack of standardized sensors to compare with. Recently it is shown by Jacobsen and Jaud [J. Acoust. Soc. Am. 120, 830-837 (2006)] that it is possible to calibrate a sound pressure and particle velocity sensor in free field ...
Mihaescu Mihai - - 2010
The intra-glottal vortical structures developed in a static divergent glottis with continuous flow entering the glottis are characterized. Laryngeal airflow calculations are performed using the Large Eddy Simulation approach. It has been shown that intra-glottal vortices are formed on the divergent wall of the glottis, immediately downstream of the separation ...
Ho I-Ju IJ Department of Sports Medicine, College of Medicine, Kaohsiung Medical - - 2010
The aim of this study was to examine the effect of changes in speed and incline slope on plantar pressure distribution of the foot during treadmill jogging. Plantar pressure parameters were measured with the Pedar-X system in twenty healthy girls (mean age of 20.7 years, mean height of 1.60m, and ...
Nakamura Orlando K OK Grupo de I&D en Ingeniería Biomédica, Centro de Investigación y Desarrollo en Ingeniería, Facultad de Ingeniería Electrónica y Mecatrónica, Universidad Tecnológica del Perú, Lima, Perú. - - 2010
The objective of this work is to study and design a portable non invasive prototype which allows us to supervise the mastication frequency and pressure for specific meals, performing an analysis of sounds and pressures generated by facial muscles when they are chewing. These variables have a direct influence on ...
Aerts J R M - - 2010
It is generally accepted that the middle ear acts mainly as a linear system for sound pressures up to 130 dB SPL in the auditory frequency range. However, at quasi-static pressure loads a strong nonlinear response has been demonstrated. Consequently, small nonlinear distortions may also be present in the middle ...
Steele Catriona M - - 2010
PURPOSE: Evidence of tongue-palate pressure modulation during swallowing between thin and nectar-thick liquids stimuli has been equivocal. This mirrors a lack of clear evidence in the literature of tongue and hyoid movement modulation between nectar-thick and thin liquid swallows. In the current investigation, the authors sought to confirm whether tongue-palate ...
Han Dong-Gyun - - 2010
Some asymmetry of body parts (thumbs, cubital crease levels, popliteal crease levels, toes, breasts, gonads and facial structures) is commonly observed. And there is also neurobehavioral asymmetry such as handedness and language lateralization. Since right-handedness is closely associated with left-hemisphere dominance for language, it is known that handedness can be ...
Verrij Elisabeth Antoinette - - 2009
INTRODUCTION: Recent guidelines suggest that Korotkoff sounds can be enhanced by elevating the arm overhead for 30 s before inflating the cuff, and then bringing the arm to the usual position to continue the blood pressure measurement. MATERIALS AND METHODS: We evaluated the effect of this manoeuvre on the loudness ...
Nakajima Hideko Heidi HH Department of Otology and Laryngology, Harvard Medical School, Boston, MA 02115, USA. - - 2010
Round-window (RW) stimulation has improved speech perception in patients with mixed hearing loss. In cadaveric temporal bones, we recently showed that RW stimulation with an active prosthesis produced differential pressure across the cochlear partition (a measure related to cochlear transduction) similar to normal forward sound stimulation above 1 kHz, when ...
Sundberg Johan - - 2010
Whisper productions were produced by a single adult male subject over a wide range of subglottal pressures, glottal areas, and glottal flows. Dimensional measurements were made of these three variables, including glottal perimeter. Subglottal pressure was directly obtained by a pressure transducer in a tracheal catheter, and wide-band flow with ...
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