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Ning Xiaopeng - - 2010
The objective of this study was to quantify the effects of ground surface motion on the biomechanical responses of a person performing a lifting task. A boat motion simulator (BMS) was built to provide a sinusoidal ground motion (simultaneous vertical linear translation and a roll angular displacement) that simulates the ...
Basioni Yehia - - 2011
Treatment of adult acquired flexible flat foot deformity can be problematic. Triple arthrodesis for structural correction has been the standard of care, thus sacrificing hind foot motion. The objective of this study was to assess the value of double calcaneal osteotomies in improving structural alignment while maintaining hind foot motion, ...
Krenzel Brian A - - 2010
Dislocation after total hip arthroplasty (THA) is multifactorial and is dependent on surgical, implant, and patient factors. We hypothesized that high preoperative hip range of motion is an important variable contributing to instability after THA. We retrospectively reviewed 3379 THAs performed during a 21-year period. Average follow-up was 6.6 years. ...
Lin I-Chen - - 2010
In this paper, we present a representation method for motion capture data by exploiting the nearly repeated characteristics and spatio-temporal coherence in human motion. We extract similar motion clips of variable lengths or speeds across the database. Since the coding costs between these matched clips are small, we propose the ...
Scholtes Sara A SA School of Physical Therapy and Rehabilitation Science, The University of Montana, 135 Skaggs Building, Missoula, MT 59812, USA. - - 2010
The purpose of the current study was to examine how effectively people with and people without low back pain (LBP) modify lumbopelvic motion during a limb movement test. Nineteen subjects with LBP and 20 subjects without LBP participated. Kinematic data were collected while subjects performed active hip lateral rotation (HLR) ...
Trumble Thomas E - - 2010
BACKGROUND: In order to improve digit motion after zone-II flexor tendon repair, rehabilitation programs have promoted either passive motion or active motion therapy. To our knowledge, no prospective randomized trial has compared the two techniques. Our objective was to compare the results of patients treated with an active therapy program ...
Lee Sae Yong - - 2010
Rearfoot eversion motion and arch height are believed to contribute to increased tension on the plantar fascia and arch collapse during gait but the specifics of these relationships are not clear. To examine the relationships among static arch height, rearfoot eversion, dynamic arch height, and plantar fascia tension. 28 healthy ...
Li Tongcang - - 2010
Brownian motion of particles affects many branches of science. We report on the Brownian motion of micrometer-sized beads of glass held in air by an optical tweezer, over a wide range of pressures, and we measured the instantaneous velocity of a Brownian particle. Our results provide direct verification of the ...
Stirling Leia - - 2010
The ability to model astronaut reorientations computationally provides a simple way to develop and study human motion control strategies. Since the cost of experimenting in microgravity is high, and underwater training can lead to motions inappropriate for microgravity, these techniques allow for motions to be developed and well-understood prior to ...
Stadler Adrian-Mihail - - 2010
The shape of ligand strands composed of six-membered aza-heterocycles (het) connected at the alpha and alpha' positions by hydrazone (hyz) units is determined in a predictable fashion by the nature of the heterocyclic groups (pyridine, pyrimidine, pyrazine etc.), and covers the range from extended linear to compact helical structures. The ...
Ke Hua - - 2010
Silica microspheres that are half-coated with platinum metal undergo self-propulsion in solutions of H(2)O(2), with the average speed increasing with increasing H(2)O(2) concentration. Microscopic observation of the particle motion, with segmentation of the image data, demonstrates that the particles move, on average, with the platinum-coated region oriented opposite to the ...
Gitterman M - - 2010
In contrast to the cases usually studied of a harmonic oscillator subject to a random force (Brownian motion) or having random frequency or random damping, we consider a random mass which corresponds to an oscillator for which the particles of the surrounding medium adhere to it for some (random) time ...
Park Cheol Hoon - - 2010
Various passive and/or active antirolling devices have been used for suppressing the rolling motion of ships in the ocean. In this study, a maglev-type active mass driver (AMD) is developed for controlling the rolling motion of a shiplike structure. No friction is generated during the motion of this maglev-type AMD, ...
Dougherty Erin - - 2010
Swimming animals may experience a wide range of destabilizing forces resulting from the movements of their propulsors. These forces often cause movements in directions other than the intended trajectory (i.e., recoil motions), potentially increasing locomotor costs. We quantified rectilinear swimming stability for posthatchling loggerhead (Caretta caretta) and green turtles (Chelonia ...
Werner Frederick W - - 2010
A common treatment of arthritis of the thumb carpometacarpal joint requires all or a portion of the flexor carpi radialis tendon (FCR) to be used as an interpositional graft. The purpose of this study was to examine the in vitro tendon forces in 6 wrist flexors and extensors to determine ...
Busch Sebastian - - 2010
The motion of phospholipids has previously been studied on many time scales due to the significance for living cells and technological applications. The motions on a pico- to nanosecond time scale were determined by quasielastic neutron scattering (QENS) to be much faster than the ones on the microsecond scale covered ...
Unterreithmeier Quirin P - - 2010
An integrable on-chip displacement transduction of nanomechenical motion is developed that senses the modulation of the optical near-field of an illuminated vibrating string with a nearby Schottky photodiode. This scheme poses no restrictions on resonator material and avoids additional damping. The achieved sensitivity of 1 pm/Hz(1/2) enables the detection of ...
Li Xiaohai - - 2010
A great variety of biological groups form a self-organized swarming motion at some point during their life spans, which has two prominent collective features: common velocity and constant spacings among members. In this paper, we present a general individual-based motion framework to explain such collective motion of swarms in homogeneous ...
Tian Wei - - 2010
The velopharyngeal port closes and opens by the velar and pharyngeal wall motion during speech. Velopharyngeal dysfunction (failure to close or open appropriately) often involves insufficient motion or mistiming of the motion. Despite the fact that evaluation of the velopharyngeal port size by nasopharyngoscopy has been popular in clinical settings, ...
Sim Jae Hoon - - 2010
It has been reported that the physiological motion of the stapes in human and several animals in response to acoustic stimulation is mainly piston-like at low frequencies. At higher frequencies, the pattern includes rocking motions around the long and short axes of the footplate in human and animal ears. Measurements ...
Rozenbaum V M - - 2010
We consider noise-induced reciprocating motion on the nanoscale and its rectification to directed motion using a simple model in which transitions between two fluctuating states occur through two reaction channels with fluctuating transition rates. The fluctuations of states and transition rates arise from equilibrium thermal and external nonthermal noise which ...
Jeon Jae-Hyung - - 2010
Motivated by subdiffusive motion of biomolecules observed in living cells, we study the stochastic properties of a non-Brownian particle whose motion is governed by either fractional Brownian motion or the fractional Langevin equation and restricted to a finite domain. We investigate by analytic calculations and simulations how time-averaged observables (e.g., ...
Gotoda Hiroshi - - 2010
The dynamic behavior of swirling premixed flames generated by the effect of the gravitational orientation has been experimentally and numerically investigated. When the gravitational direction relative to the flame front is changed, i.e., in inverted gravity (-1G), an unstable flame is formed in a limited domain of equivalence ratio and ...
Kramer Robin S S - - 2010
Body motion signals socially relevant traits like the sex, age, and even the genetic quality of actors and may therefore facilitate various social judgements. By examining ratings and voting decisions based solely on body motion of political candidates, we considered how the candidates' motion affected people's judgements and voting behaviour. ...
Bush John W M - - 2010
We describe the physics behind a peculiar feeding mechanism of a certain class of shorebirds, in which they transport their prey in droplets from their beak tips mouthwards. The subtle interplay between the drop and the beak's tweezering motion allows the birds to defy gravity through driving the drop upwards. ...
Iida Keita - - 2010
A change in the mode of self-motion coupled with complex formation was investigated experimentally and theoretically. A 1,10-phenanthroline disk floating on water exhibited either uniform or intermittent motion (in which the disk altered between rapid motion and a resting state) depending on the concentration of Fe(2+) in the aqueous phase. ...
Fujiwara Katsuo - - 2010
We investigated the relationship between an individual's center of pressure in the anteroposterior direction in quiet standing (QS) and perceptibility of different standing positions. The position of the center of pressure in the anteroposterior direction (CoPy position) while standing was represented as the percentage distance (%FL) from the hindmost point ...
Candelier Raphaël - - 2010
We study experimentally the motion of an intruder dragged into an amorphous monolayer of horizontally vibrated grains at high packing fractions. This motion exhibits two transitions. The first transition separates a continuous motion regime at comparatively low packing fractions and large dragging force from an intermittent motion one at high ...
Chuter Vivienne H - - 2010
The Foot Posture Index (FPI) provides an easily applicable, validated method for quantifying static foot posture. However there is limited evidence relating to the ability of the FPI to predict dynamic foot function. This study aimed to assess the relationship between dynamic rearfoot motion and FPI scores in pronated and ...
Fields Alexander P - - 2010
Until recently, Brownian motion was seen as an immutable feature of small particles in room-temperature liquids. Molecules, viruses, organelles, and small cells jiggle incessantly due to countless collisions with thermally agitated molecules of solvent. Einstein showed in 1905 that this motion is intimately linked to the tendency of every system ...
Maeda Shingo - - 2010
Many kinds of stimuli-responsive polymer and gels have been developed and applied to biomimetic actuators or artificial muscles. Electroactive polymers that change shape when stimulated electrically seem to be particularly promising. In all cases, however, the mechanical motion is driven by external stimuli, for example, reversing the direction of electric ...
Rohde Rachel S - - 2010
Unlike any other diarthrodial joint in the human body, the "wrist joint" is composed of numerous articulations between eight carpal bones, the distal radius, the distal ulna, and five metacarpal bones. The carpal bones articulate with each other as well as with the distal radius, distal ulna, and the metacarpal ...
Choi Changmok C Department of Mechanical Engineering, Korea Advanced Institute of Science & Technology (KAIST), Daejeon, Republic of Korea. - - 2010
This paper presented an estimation method of multi-directional and proportional fluid wrist motion intents via sEMG using a non-negative muscle synergy matrix and a joint synergy matrix. A real-time experiment was performed to validate feasibility of the proposed method, and the experimental environment was realized for the individuals with wrist ...
Buxi Dilpreet D IMEC at the Holst Centre, HTC 31, 5656 AE Eindhoven, The Netherlands. - - 2010
Heart rate monitoring has been a significant topic of interest in the areas of healthcare, sports and gaming. Compared to locations such as the neck, ear, or chest, the wrist is a convenient measurement point, as the measurement technology can be integrated into a wristwatch. However, key technical challenges exist, ...
Feist Michele I - - 2010
The introduction of Talmy's (1985, 2000) typology sparked significant interest in linguistic relativity in the arena of motion language. Through careful analysis of the conflation patterns evident in the language of motion events, Talmy noted that one class of languages, V-languages, tends to encode path along with the fact of ...
Ulrich Slif D - - 2010
HYPOTHESIS: Loss of range of motion after injury or surgery of the elbow is a common complication. We hypothesized that an orthosis that used progressive stretch and stress relaxation principles would improve elbow range of motion. METHODS: This study evaluated the result of a patient-directed, bidirectional orthosis that uses static ...
Saikia S - - 2009
Recently, dispersionless (coherent) motion of (noninteracting) massive Brownian particles, at intermediate time scales, was reported in a sinusoidal potential with a constant tilt. The coherent motion persists for a finite length of time before the motion becomes diffusive. We show that such coherent motion can be obtained repeatedly by applying ...
Sakaguchi Hidetsugu - - 2009
Cooperative jump motions are studied for mutually interacting particles in a one-dimensional periodic potential. The diffusion constant for the cooperative motion in systems including a small number of particles is numerically calculated and it is compared with theoretical estimates. We find that the size distribution of the cooperative jump motions ...
Yoshii Yuichi Y Orthopedic Biomechanics Laboratory and Division of Cardiovascular Diseases, Mayo Clinic, Rochester, MN 55905, USA. - - 2009
Peripheral nerves are mobile structures, stretching and translating in response to changes in the position of adjuvant anatomic structures. The objective of this study was to develop a novel method to characterize the relative motion and deformation of the median nerve on cross-sectional ultrasound images of the carpal tunnel during ...
Aarnisalo Antti A - - 2010
Stroboscopic holography was used to quantify dynamic deformations of the tympanic membrane (TM) of the entire surface of the TM before and after cartilage tympanoplasty of the posterior or posterior-superior part of the TM. Cartilage is widely used in tympanoplasties to provide mechanical stability for the TM. Three human cadaveric ...
Yu Donald C - - 2009
The two essential procedures for cleaning and shaping the root canal systems are the establishment of apical patency and the serial enlargement of the body of the root canal by the envelope of motion of reamers. Following these two critical procedures, the five mechanical objectives of cleaning and shaping will ...
Godwin Alison - - 2009
Inertial motion sensors (IMSs) combine three sensors to produce a reportedly stable and accurate orientation estimate in three dimensions. Although accuracy has been reported within the range of 2 deg of error by manufacturers, the sensors are rarely tested in the challenging motion present in human motion. Their accuracy was ...
Teufel J D - - 2009
Nanomechanical oscillators are at the heart of ultrasensitive detectors of force, mass and motion. As these detectors progress to even better sensitivity, they will encounter measurement limits imposed by the laws of quantum mechanics. If the imprecision of a measurement of the displacement of an oscillator is pushed below a ...
de La Rochefoucauld Ombeline - - 2010
Based on comparisons of ear canal and scala vestibuli pressures the gerbil middle ear transmits sound with a gain of approximately 25 dB that is almost flat from 2 to 40 kHz, and with a delay-like phase corresponding to a 25-30 micros delay. How the middle ear is able to ...
Getzmann Stephan - - 2010
The effect of the type of the auditory motion stimulus on neural correlates of motion processing were investigated using high-density electroencephalography. Sound motion was implemented by (a) gradual shifts in interaural time or (b) level difference; (c) motion of virtual 3D sound sources; or (d) successive activation of 45 loudspeakers ...
Welte Michael A - - 2009
Lipid droplets are intracellular organelles that play central roles in lipid metabolism. In many cells, lipid droplets undergo active motion, typically along microtubules. This motion has been proposed to aid growth and breakdown of droplets, to allow net transfer of nutrients from sites of synthesis to sites of need and ...
Laudner Kevin G - - 2010
BACKGROUND: During the throwing motion, the lower extremity is responsible for creating power that is transmitted through the core to the upper extremity. Research has shown that good hip range of motion and strength in throwing athletes results in greater performance and decreased stress placed on the upper extremity. Although ...
Liu Kuang-Chen - - 2009
Pizza tossing and certain forms of standing-wave ultrasonic motors (SWUMs) share a similar process for converting reciprocating input into continuous rotary motion. We show that the key features of this motion conversion process such as collision, separation and friction coupling are captured by the dynamics of a disk bouncing on ...
Comstock Christine - - 2009
OBJECTIVE: The purpose of this series was to determine whether paradoxical motion of the diaphragm reliably identifies congenital diaphragmatic hernias (CDHs). METHODS: Sonographic evaluation of diaphragmatic motion was attempted in all fetuses undergoing a targeted examination for findings suggestive of a possible CDH. During any respiratory motion or hiccupping, the ...
Peltz Cathryn D - - 2009
Surgical repairs of torn rotator cuff tendons frequently fail. Immobilization has been shown to improve tissue mechanical properties in an animal model of rotator cuff repair, and passive motion has been shown to improve joint mechanics in animal models of flexor tendon repair. Our objective was to determine if daily ...
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