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Adhikari Arjun S AS Department of Chemical Engineering, Stanford - - 2012
The generation and detection of mechanical forces is a ubiquitous aspect of cell physiology, with direct relevance to cancer metastasis(1), atherogenesis(2) and wound healing(3). In each of these examples, cells both exert force on their surroundings and simultaneously enzymatically remodel the extracellular matrix (ECM). The effect of forces on ECM ...
Munoz-Price L Silvia - - 2012
We compared cleaning rates associated with use of a white ultraviolet (UV) powder versus a transparent UV gel among units with various degrees of previous experience with UV powder. The study outcome was the presence of discordant cleaning (removal of powder without the removal of gel, or vice versa). We ...
Brasiliense Leonardo B C - - 2011
STUDY DESIGN.: In vitro assessment of rib cage biomechanics in the region of true ribs with the ribs intact then sequentially resected in 5 steps. OBJECTIVE.: To determine the contribution of the rib cage to thoracic spine stability and kinematics. SUMMARY OF BACKGROUND DATA.: Previous in vitro studies of rib ...
Dam Hans G - - 2011
Predicting the response of the biota to global change remains a formidable endeavor. Zooplankton face challenges related to global warming, ocean acidification, the proliferation of toxic algal blooms, and increasing pollution, eutrophication, and hypoxia. They can respond to these changes by phenotypic plasticity or genetic adaptation. Using the concept of ...
Jongen Ellen M M - - 2011
It was investigated how speed limit repetition and distraction affect drivers' speed management throughout a road section where the imposed speed limit is not in accordance (too low) with road design. It is not clear how driving speed evolves and to what degree speed limit repetition is necessary on roads ...
Bjornaraa Jaynie - - 2011
Specific movement patterns have been identified as influential in ACL injury; however several key kinematic variables that might be predictive of future performance have not been fully investigated. The purpose of this research was to: 1) determine if subjects with ACL reconstruction display different displacement, velocity, and time to peak ...
Nanda Aditi - - 2011
Abstract Abstract: Managements of malignancies and abnormal growths in maxillary sinus often include ablative surgeries. The closure of the resulting anatomical defect can be achieved with an obturator prosthesis. Reduction in weight of the obturator is an important consideration in improving the retention and stability of the prosthesis. Hollowing the ...
Keserü Matthias - - 2011
Purpose:  To determine the threshold charges needed for eliciting visual perceptions through acute electrical stimulation of the human retina in patients suffering from retinitis pigmentosa, using an epiretinal microelectrode array. Methods:  In a multicentre study, 20 patients (average age 55 years) with visual acuities ranging from 4/200 to no light perception ...
Lin Jia-Hua - - 2011
Hand-handle interface is seldom considered in contemporary upper limb biomechanical analyses of pushing and pulling strength. A laboratory study was designed to examine if handle rotation in the frontal plane (0°-horizontal, 45°, and 90°-vertical), anterior tilt (0°-parallel to the frontal plane, and 15°), and distance between two handles (31 and ...
Yeung L F - - 2011
Trans-tibial amputees are advised to walk as much as able people to achieve healthy and independent life. However, they usually have difficulties in doing so. Previous researches only included data from a few steps when studying the gait of amputees. Walking over a long distance was rarely examined. The objective ...
Russell T - - 2011
The force applied during laryngoscopy can cause local tissue trauma and can induce cardiovascular responses and cervical spine movement in susceptible patients. Previous studies have identified numerous operator and patient factors that influence the amount of force applied during intubation. There are few studies evaluating the effect of different laryngoscope ...
Halenar Lauren B - - 2011
The majority of previous publications have suggested that the large-bodied subfossil Protopithecus brasiliensis was a suspensory ateline with a locomotor repertoire similar to that of extant Ateles and Brachyteles. This is unexpected, as the cranial morphology of Protopithecus is very similar to Alouatta, a genus usually classified as a deliberate ...
Shida Yoshiteru - - 2011
BACKGROUND:: Volatile anesthetics attenuate medium-frequency (250 to 500 Hz) pulse train transcranial electrical stimulation (TES) motor-evoked potentials (MEPs) better than propofol. High-frequency (1000 Hz) TES may restore hand MEP amplitude under volatile anesthesia, but its effect on leg MEPs critical for spine surgery monitoring is unknown. METHODS:: The effects of ...
Vercruysse Sarah - - 2011
Freezing of gait (FOG) is an incapacitating problem in Parkinson's disease that is difficult to manage therapeutically. We tested the hypothesis that impaired rhythm and amplitude control is a common mechanism of freezing which is also present during other rhythmic tasks. Therefore, we compared the occurrence and spatiotemporal profiles of ...
Barrett Rod S - - 2011
Experiments designed to assess balance recovery in older adults often involve exposing participants to repeated loss of balance. The purpose of this study was to investigate the adaptive balance recovery response exhibited by older adults following repeated exposure to forward loss of balance induced by releasing participants from a static ...
Kato Yuki - - 2011
PURPOSE: To investigate the biomechanics of the intermediate (IM), anteromedial (AM), and posterolateral (PL) bundles in the human anterior cruciate ligament (ACL). METHODS: Eighteen human cadaveric knees were tested with a robotic/universal force-moment sensor testing system. Anterior tibial translation (ATT) was determined under an 89-N anterior tibial load. Coupled ATT ...
Altman Allison R AR Biomechanics and Movement Science Program, 301 McKinly Lab, University of Delaware, Newark, DE 19716, USA. - - 2012
Instrumented treadmills are becoming increasingly more common in gait laboratories. Instrumented side-split treadmills allow the collection of forces under each foot during walking. However, there may be a tendency to increase the base of support when walking on these treadmills, influencing other frontal plane mechanics as well. Therefore, the purpose ...
Yang Yang - - 2011
BACKGROUND: Due to differences in corneal grafting microsurgery between manual and robotic suturing, new challenges have arisen in testing the insertion force and torque of corneal tissue acting on suturing needles in order to guarantee successful completion of surgical procedures. METHODS: In order to measure the force during the insertion ...
Skrodzka Ewa - - 2011
Similarities and differences in vibrational behavior of two guitars having a symmetric Torres bracing pattern and an asymmetric pattern forming a lattice on a soundboard are investigated by means of the modal analysis technique and laser Doppler vibrometry (LDV) measurements. Instruments are investigated before and after a bridge and strings ...
Clancy Neil T - - 2011
Background. Minimally invasive surgical techniques such as single access and natural orifice translumenal endoscopic surgery (NOTES) aim to reduce the number of external scars on the patient but impose restrictions on the space available for the light source within the endoscope and, therefore, the size of the field of view ...
Johnson Tiffany A - - 2011
OBJECTIVES:: To determine whether common approaches to setting stimulus parameters influence the depth of fine structure present in the distortion product otoacoustic emission (DPOAE) response. Because the presence of fine structure has been suggested as a possible source of errors, if one of the common parametric approaches results in reduced ...
Sakai Yoko - - 2011
Upright Ag nanoplates on a nanoparticulate TiO(2) film are oriented on the basis of plasmon-induced charge separation. Polarized visible light removes nanoplates oriented perpendicularly to polarization via excitation of in-plane transverse mode. Polarized near-infrared light removes nanoplates in parallel geometry via excitation of in-plane longitudinal mode.
Blanco Justin A JA Department of Electrical and Computer Engineering, United States Naval Academy, Annapolis, MD 21402, USA. - - 2011
Transient high-frequency (100-500 Hz) oscillations of the local field potential have been studied extensively in human mesial temporal lobe. Previous studies report that both ripple (100-250 Hz) and fast ripple (250-500 Hz) oscillations are increased in the seizure-onset zone of patients with mesial temporal lobe epilepsy. Comparatively little is known, ...
Okcu Selen - - 2011
Intensive care units (ICUs) have important but challenging sound environments. Alarms and equipment generate high levels of noise and ICUs are typically designed with hard surfaces. A poor sound environment can add to stress and make auditory tasks more difficult for clinicians. However few studies have linked more detailed analyses ...
Choi Hyeog-Gi - - 2011
To analyze frequency-specific hearing results after surgery for chronic ear diseases while considering pathological findings and various surgical factors. Patients who underwent surgical management of chronic otitis media were reviewed retrospectively (n=559). Using pure tone audiometry, air conduction (AC), bone conduction (BC), and air bone gap (ABG) change between pre- ...
Dayton Amanda - - 2011
Despite numerous advances, lumpectomy remains a challenging procedure. We report on the early use of light-guided lumpectomy. Eight patients with non-palpable breast cancer undergoing lumpectomy for biopsy-proven and radiographically identifiable cancer were enrolled in the study. An optical wire was designed that incorporated a standard hook-wire with an optical fiber. ...
Dutta Tilak - - 2011
This study investigated the differences in peak external hand forces and external moments generated at the L5/S1 joint of the low back due to maneuvering loaded floor-based and overhead-mounted patient lifting devices using one and two caregivers. Hand forces and external moments at the L5/S1 joint were estimated from ground ...
Zamma Koichiro - - 2011
Grooming was observed in 11 wild chimpanzees (Pan troglodytes schweinfurthii) in Mahale, Tanzania, and the number of removal and stroke movements and grooming duration were recorded. Removal movements were more frequent during social grooming than during self-grooming. Chimpanzees used one or both hands for grooming, and grooming using both hands ...
Hughes P C - - 2011
Objective: Recent evidence suggests that shoulder impingement syndrome arises from primary rotator cuff pathology and may be related to the inability of the rotator cuff to prevent superior humeral head migration in shoulder elevation. Impingement involves compression of subacromial structures, including the rotator cuff. Previously, clinical tests have been shown ...
Wysocki Jarosław - - 2011
Surgical intervention within the area of the middle ear always leads to alteration of conditions in its biomechanical system. This fact may provide an explanation for the lack of expected auditory outcome, although an apparently good anatomic outcome was obtained. In the case of stapedotomy, the majority of patients report ...
Näsänen Risto - - 2011
We investigated the question of how the perception of three-dimensional information reconstructed numerically from digital holograms of real-world objects, and presented on conventional displays, depends on motion and stereoscopic presentation. Perceived depth in an adjustable random pattern stereogram was matched to the depth in hologram reconstructions. The objects in holograms ...
Smith Tim J - - 2011
Oculomotor inhibition of return (IOR) is believed to facilitate scene scanning by decreasing the probability that gaze will return to a previously fixated location. This "foraging" hypothesis was tested during scene search and in response to sudden-onset probes at the immediately previous (one-back) fixation location. The latencies of saccades landing ...
Motta Pierorazio - - 2011
PURPOSE: A retrospective long-term study was carried out to determine whether there was any correlation between the clinical motion of the acromioclavicular joint evaluated by a test we set up using 90° of abduction and 0° of external rotation against resistance [90°/0°RTest] and the cross arm test (compared to the ...
Zhang Lian - - 2011
Objective To investigate the accuracy of amplitude-integrated electroencephalography (aEEG) in detecting full-term neonatal seizures. Methods Conventional EEG (cEEG) and aEEG were simultaneously applied to 62 full-term newborns with seizures and results were analyzed with different methods. Results Of 876 seizures confirmed by cEEG, 21% were detected by clinical observation, 44.4% ...
Graci Valentina - - 2011
It has been previously suggested that coupled upper and limb movements need visuomotor coordination to be achieved. Previous studies have not investigated the role that visual cues may play in the coordination of locomotion and prehension. The aim of this study was to investigate if lower peripheral visual cues provide ...
Vaz Rodrigues L - - 2011
A comprehensive knowledge of the normal pattern of endobronchial branching is essential to any pulmonologist. The classification systems available are predominantly static descriptions and only seldom do they refer to possible variations within the normal spectrum. To evaluate all possible anatomical variants of the tracheobronchial tree we conducted a prospective ...
Park Kyue-Nam - - 2011
Park K-N, Cynn H-S, Kwon O-Y, Lee W-H, Ha S-M, Kim S-J, Weon J-H. Effects of the abdominal drawing-in maneuver on muscle activity, pelvic motions, and knee flexion during active prone knee flexion in patients with lumbar extension rotation syndrome. OBJECTIVE: To investigate the effects of performing an abdominal drawing-in ...
Sang Hongqiang - - 2011
BACKGROUND: Compared with conventional minimally invasive surgery and open surgery, robotic-assisted minimally invasive surgery can overcome or eliminate drawbacks caused by operator restrictions, motion limitation by the trocar and the image system, such as fatigue, trembling, low precision, constrained degree-of-freedom, poor hand-eye coordination and restricted surgical vision. In this paper, ...
Wichmann Thomas T Yerkes National Primate Research Center, Emory University, Atlanta, GA 30329, USA. - - 2011
Electrophysiological studies of the effects of electrical brain stimulation have to contend with stimulus artifacts, which complicate both the maintenance of recorded neuron waveforms at recording time, and the post-hoc analysis of the data. The artifacts can be removed by digitally averaging some or all of the (stereotypic) artifact waveforms ...
Ceseracciu Elena - - 2011
Research on motion analysis of swimmers is commonly based on video recordings of the subject's motion, which are analyzed by manual digitization of feature points by an operator. This procedure has two main drawbacks: it is time-consuming, and it is affected by low repeatability. Therefore, the application of video-based, automatic ...
Pierce S E - - 2011
Regional variation in the axial skeleton of pinnipeds (seals and walruses) and its correlation with aquatic locomotory behaviour is examined using vertebral functional profiles. The results demonstrate clear morpho-functional differences in the thoracolumbar region of modern pinnipeds (Phocidae, Otariidae, Odobenus) that can be strongly linked to swimming style. Phocid seals ...
Mazine Alexandre - - 2011
We present a new multi-illumination technique for the determination of the phase maps of unknown phase objects and wavefronts based on their diffraction patterns. A spatial light modulator is used to generate a sequence of probe-light fields that illuminate the unknown object producing different diffraction patterns. Compared with similar diffraction-pattern-based ...
Kates James M - - 2011
The study of speech from which the temporal fine structure (TFS) has been removed has become an important research area. Common procedures for removing TFS include noise and tone vocoders. In the noise vocoder, bands of noise are modulated by the envelope of the speech within each band, and in ...
Kasap Elmas - - 2011
Gastroesophageal reflux disease (GERD) is caused by the reflux of gastric contents into the esophagus. Narrow band imaging (NBI) facilitates mucosal surface evaluation and may improve the endoscopic diagnosis of GERD. The diagnosis of GERD is based on the combination of clinical symptoms, endoscopic findings, and histological changes. In this ...
Huber P - - 2011
Recording and reconstruction of 3D motion capturing data relies on fixed, static camera positions with given inter-camera distances in a laboratory frame. To overcome this limitation, we present a correction algorithm that allows us to address camera movements in moving camera setups. Camera vibrations are identified by comparison of specialized ...
Yoshida Akihiro - - 2011
The surfaces of insect wings exhibit numerous sensilla, which have been suggested to have a behavioral function. Some evidence suggests that the sensory bristles along the wing margin of lepidopteran insects (butterflies and moths) are involved in the regulation of wing movement. We investigated the arrangement of sensory bristles along ...
van Asseldonk E H F - - 2011
Motor learning principles are increasingly used in robotic rehabilitation. These principles are mainly derived from reaching studies and it is currently unknown whether the same principles apply in locomotion. The aim of this study was to determine the effect of a gradually and suddenly introduced dynamic perturbation on locomotor adaptation ...
Wang Roy Chih Chung - - 2011
Autofluorescence endoscopy is a promising functional imaging technique to improve screening of pre-cancerous or early cancer lesions in the gastrointestinal (GI) tract. Tissue autofluorescence signal is weak compared to white light reflectance imaging. Conventional forward-viewing endoscopes are inefficient in the collection of light from objects of interest along on the ...
Prasarn Mark L - - 2011
ABSTRACT: Study Design: Human cadaveric study using various intubation devices in a cervical spine instability model.Objective: We sought to evaluate various intubation techniques to determine which device results in the least cervical motion in the setting of a global ligamentous instability model.Summary of Background Data: Many patients presenting with a ...
Radziwon Kelly E - - 2011
The present study examined auditory distance perception cues in a non-territorial songbird, the zebra finch (Taeniopygia guttata), and in a non-songbird, the budgerigar (Melopsittacus undulatus). Using operant conditioning procedures, three zebra finches and three budgerigars were trained to identify 1- (Near) and 75-m (Far) recordings of three budgerigar contact calls, ...
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