Search Results
Results 1 - 50 of 2809
1 2 3 4 5 6 7 8 9 10 >
Yang Sungwook S Robotics Institute, Carnegie Mellon University, Pittsburgh, PA 15213 - - 2015
This paper presents the design and actuation of a six-degree-of-freedom (6-DOF) manipulator for a handheld instrument, known as "Micron," which performs active tremor compensation during microsurgery. The design incorporates a Gough-Stewart platform based on piezoelectric linear motor, with a specified minimum workspace of a cylinder 4 mm long and 4 ...
Hidayat Egi E Department of Information Technology, Uppsala University, Uppsala, Sweden, - - 2015
The classical Hassenstein-Reichardt mathematical elementary motion detector (EMD) model is treated analytically. The EMD is stimulated with drifting sinusoidal gratings, which are often used in motion vision research, thus enabling direct comparison with neural responses from motion-sensitive neurones in the fly brain. When sinusoidal gratings are displayed on a cathode ...
Andrada Emanuel E Science of Motion, Friedrich-Schiller University Jena, Seidelstraße 20, 07749 Jena, Germany - - 2014
In contrast to the upright trunk in humans, trunk orientation in most birds is almost horizontal (pronograde). It is conceivable that the orientation of the heavy trunk strongly influences the dynamics of bipedal terrestrial locomotion. Here, we analyse for the first time the effects of a pronograde trunk orientation on ...
Arrighi Roberto R Department of Neuroscience, Psychology, Pharmacology and Child Health, University of Florence, via San Salvi 12, Florence 50135, - - 2014
Much evidence has accumulated to suggest that many animals, including young human infants, possess an abstract sense of approximate quantity, a number sense. Most research has concentrated on apparent numerosity of spatial arrays of dots or other objects, but a truly abstract sense of number should be capable of encoding ...
McAuley J Devin JD Department of Psychology, Michigan State University, East Lansing, MI 48824, USA - - 2014
This study considered the contribution of dynamic attending theory (DAT) and attentional entrainment to systematic distortions in perceived event duration. Three experiments were conducted using an auditory oddball paradigm, in which listeners judged the duration of a deviant (oddball) stimulus embedded within a series of identical (standard) stimuli. To test ...
Kotz Sonja A SA School of Psychological Sciences, University of Manchester, Brunswick Street, Manchester M13 9PL, UK Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Stephanstrasse 1a, 04103 Leipzig, Germany - - 2014
We live in a dynamic and changing environment, which necessitates that we adapt to and efficiently respond to changes of stimulus form ('what') and stimulus occurrence ('when'). Consequently, behaviour is optimal when we can anticipate both the 'what' and 'when' dimensions of a stimulus. For example, to perceive a temporally ...
Reynolds Raymond F RF School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham B15 2TT, UK - - 2014
Here we explain the neural and mechanical mechanisms responsible for synchronizing sway and improving postural control during physical contact with another standing person. Postural control processes were modelled using an inverted pendulum under continuous feedback control. Interpersonal interactions were simulated either by coupling the sensory feedback loops or by physically ...
Stone Maureen M Department of Neural and Pain Science, Department of Orthodontics, University of Maryland School of Dentistry, Baltimore, MD, USA. telephone: 410-706-1269, fax: 410-706-0865, - - 2014
The production of speech includes considerable variability in speech gestures despite our perception of very repeatable sounds. Variability is seen in vocal tract shapes and tongue contours when different speakers produce the same sound. This study asks whether internal tongue motion patterns for a specific sound are similar across subjects, ...
Tremblay Marilyn M *Radiation Protection Bureau, 775 Brookfield Road, Ottawa, Ontario, Canada; †2424 Erwin Road, Hock Plaza Suite 302, Durham, NC - - 2014
The Human Monitoring Laboratory (Canada) has looked at parameters (lung volume, lung deposition pattern, etc.) that can affect the counting efficiency of its lung counting system. The calibration of the system is performed using the Lawrence Livermore National Laboratory (LLNL) torso phantom; however, the effect of respiratory motion cannot be ...
Ishihara D - - 2014
The relative importance of the wing’s inertial and aerodynamic forces is the key to revealing how the kinematical characteristics of the passive pitching motion of insect flapping wings are generated, which is still unclear irrespective of its importance in the design of insect-like micro air vehicles. Therefore, we investigate three ...
Friedman C - - 2014
To determine the two-dimensional kinematics of the California sea lion foreflipper during thrust generation, a digital, high-definition video is obtained using a non-research female sea lion at the Smithsonian National Zoological Park in Washington, DC. The observational videos are used to extract maneuvers of interest--forward acceleration from rest using the ...
Lee Jun Haeng - - 2014
We propose a real-time hand gesture interface based on combining a stereo pair of biologically inspired event-based dynamic vision sensor (DVS) silicon retinas with neuromorphic event-driven postprocessing. Compared with conventional vision or 3-D sensors, the use of DVSs, which output asynchronous and sparse events in response to motion, eliminates the ...
Moteki Hideaki H Department of - - 2014
Abstract Conclusion: Bilateral electric acoustic stimulation (EAS) effectively improved speech perception in noise and sound localization in patients with high-frequency hearing loss. Objective: To evaluate bilateral EAS efficacy of sound localization detection and speech perception in noise in two cases of high-frequency hearing loss. Methods: Two female patients, aged 38 ...
Derecha Dmytro Oleksandrovich - - 2014
We propose a new method for determining the frequency characteristics of the rotational motion of an electrolyte flow during electrochemical reactions under the influence of an external magnetic field. The main advantage of the proposed method is the possibility to determine the frequency characteristics without introducing marker particles or other ...
Suzuki Takao K - - 2014
BackgroundSpecial resemblance of animals to natural objects such as leaves provides a representative example of evolutionary adaptation. The existence of such sophisticated features challenges our understanding of how complex adaptive phenotypes evolved. Leaf mimicry typically consists of several pattern elements, the spatial arrangement of which generates the leaf venation-like appearance. ...
Sitters Gerrit G 1] Department of Physics and Astronomy, VU University Amsterdam, Amsterdam, the Netherlands. [2] LaserLaB Amsterdam, VU University Amsterdam, Amsterdam, the - - 2014
Force spectroscopy has become an indispensable tool to unravel the structural and mechanochemical properties of biomolecules. Here we extend the force spectroscopy toolbox with an acoustic manipulation device that can exert forces from subpiconewtons to hundreds of piconewtons on thousands of biomolecules in parallel, with submillisecond response time and inherent ...
Zhang Ye Y Centre for Proton Therapy, Paul Scherrer Institut, Switzerland. Computer Vision Laboratory, ETH Zurich, Zurich, - - 2014
Tumour tracking with scanned particle beams potentially requires accurate 3D information on both tumour motion and related density variations. We have previously developed a model-based motion reconstruction method, which allows for the prediction of deformable motions from sparsely sampled surrogate motions tracked via an on-board imaging system (Zhang et al ...
Opie Christopher C Department of Anthropology, University College London, London WC1H 0BW, United Kingdom; - - 2014
Kinship provides the fundamental structure of human society: descent determines the inheritance pattern between generations, whereas residence rules govern the location a couple moves to after they marry. In turn, descent and residence patterns determine other key relationships such as alliance, trade, and marriage partners. Hunter-gatherer kinship patterns are viewed ...
Schlauch Robert S - - 2014
Four functional hearing loss protocols were evaluated. For each protocol, 30 participants feigned a hearing loss first on an audiogram, and then for a screening test that began a threshold search from extreme levels (-10 or 90 dB HL). Two-tone and a three-tone protocols compared thresholds for ascending and descending ...
Fieldhouse Sarah J SJ Forensic and Crime Science Department, Staffordshire University, The Science Centre, Leek Road, Stoke on Trent, ST4 2DF, - - 2014
Physical factors, including the magnitude of the force applied during fingermark deposition, may affect friction ridge surface area and clarity, and the quantity of residue transferred. Consistency between fingermarks may be required; for example, in research projects, yet differences between marks are likely to exist when physical factors are not ...
Fleischer Mario M Department of Otorhinolaryngology, Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany, - - 2014
The acoustical properties of the vocal tract, the air-filled cavity between the vocal folds and the mouth opening, are determined by its individual geometry, the physical properties of the air and of its boundaries. In this article, we address the necessity of complex impedance boundary conditions at the mouth opening ...
Immonen Esa-Ville EV Department of Physics, Biophysics and Biocenter Oulu, University of Oulu, PO Box 3000, Oulun yliopisto 90014, - - 2014
The common backswimmer, Notonecta glauca, uses vision by day and night for functions such as underwater prey animal capture and flight in search of new habitats. Although previous studies have identified some of the physiological mechanisms facilitating such flexibility in the animal's vision, neither the biophysics of Notonecta photoreceptors nor ...
Sovrano Valeria Anna VA Center for Mind/Brain Sciences (CIMeC), University of Trento, C.so Bettini 31, 38068, Rovereto, Trento, Italy, - - 2014
The tendency of fish to perceive the Ebbinghaus illusion was investigated. Redtail splitfins (Xenotoca eiseni, family Goodeidae) were trained to discriminate between two disks of different sizes. Then, fish were presented with two disks of the same size surrounded by disks of large or small size (inducers) arranged to produce ...
Ramos de Miguel Angel A *Head and Neck Department, Complejo Hospitalario Universitario Insular Materno-Infantil de Gran Canaria, Acoustics Lab, and †Head and Neck Department, Complejo Hospitalario Universitario Insular Materno-Infantil de Gran Canaria, Avenida Marítima del Sur, Las Palmas, - - 2014
Subjects with normal hearing (NH) experience lower performance in speech understanding in noise when frequency components of speech above 8 kHz are removed. Previous studies have explored speech perception in noise under various circumstances, but none have been specifically designed to explore the relevance of frequencies above 8 kHz and, ...
Camorani Paolo P Department of Physics and Earth Sciences, University of Parma, Parco Area delle Science 7/A, I-43124, Parma, - - 2014
Raman spectroscopy, in its confocal micro-Raman declination, has been recently proposed as a spatially resolved method to identify carotenoids in various food matrices being faster, non-destructive, and avoiding the sample extraction, but no data are present in literature about its application to the evaluation of carotenoid pattern changes after thermal ...
Stefanovic Filip - - 2014
Spinal-like regulators have recently been shown to support complex behavioral patterns during volitional goal-oriented reaching paradigms. We use an interpretation of the adaptive spinal-like controller as inspiration for the development of a controller for a robotic limb. It will be demonstrated that a simulated robot arm with linear actuators can ...
Brouillard Charly C CR-ICM, - - 2014
Recording of breathing frequency is a basic requirement for respiratory physiology. Usual techniques are invasive and constraining. Respiratory sinus arrhythmia (RSA) has recently been demonstrated to be a simple way to obtain respiration frequency at rest. In this study, we investigated whether this correlation is also observed during activity. We ...
Bobbitt Jonathan Michael - - 2014
Fourier transform (FT)-plasmon waveguide resonance (PWR) spectroscopy measures light reflectivity at a waveguide interface as the incident frequency and angle are scanned. Under conditions of total internal reflection, the reflected light intensity is attenuated when the incident frequency and angle satisfy conditions for exciting surface plasmon modes in the metal ...
Engelhart Denise - - 2014
The ankles and hips play an important role in maintaining standing balance and the coordination between joints adapts with task and conditions, like the disturbance magnitude and type, and changes with age. Assessment of multijoint coordination requires the application of multiple continuous and independent disturbances and closed loop system identification ...
Denis de Senneville Baudouin - - 2014
Dynamic MR-imaging can provide functional and positional information in real-time, which can be conveniently used on-line to control a cancer therapy, e.g. using High Intensity Focused Ultrasound or Radio Therapy. However, a precise realtime correction for motion is fundamental in abdominal organs to ensure an optimal treatment dose associated with ...
Schmidt Sebastian W SW Munich University of Applied Sciences, Department of Applied Natural Sciences and Mechatronics, Lothstr. 34, 80335 Munich, Germany. clausen-schaumann@hm.edu - - 2014
AFM-based dynamic single-molecule force spectroscopy was used to stretch carboxymethylated amylose (CMA) polymers, which have been covalently tethered between a silanized glass substrate and a silanized AFM tip via acid-catalyzed ester condensation at pH 2.0. Rupture forces were measured as a function of temperature and force loading rate in the ...
Demes Brigitte B Department of Anatomical Sciences, Stony Brook University, Stony Brook, NY, - - 2014
Center of mass (CoM) oscillations were documented for 81 bipedal walking strides of three chimpanzees. Full-stride ground reaction forces were recorded as well as kinematic data to synchronize force to gait events and to determine speed. Despite being a bent-hip, bent-knee (BHBK) gait, chimpanzee walking uses pendulum-like motion with vertical ...
Czuba Thaddeus B TB Dominick Purpura Department of Neuroscience, and - - 2014
We use visual information to determine our dynamic relationship with other objects in a three-dimensional (3D) world. Despite decades of work on visual motion processing, it remains unclear how 3D directions-trajectories that include motion toward or away from the observer-are represented and processed in visual cortex. Area MT is heavily ...
Hoffman Susanne S Ludwig-Maximilians-Universität München, Germany - - 2014
Locomotion and foraging on the wing require precise navigation not only in the horizontal plane. Navigation in three dimensions and specifically, precise adjustment of flight height is essential for flying animals. Echolocating bats drink from water surfaces in flight, which requires an exceptionally precise vertical navigation. Here we exploit this ...
Serra-Añó P P Department of Physiotherapy, University of Valencia, Valencia, - - 2014
Study design:Cross-sectional study.Objectives:The main goal of our study was to explore the differences in heart rate variability (HRV) while sitting between able-bodied (AB) participants and paraplegic (P) individuals.Setting:The study was conducted in the Physical Therapy department and the Physical Education and Sports department of the University of Valencia and Vall ...
Cömert Alper - - 2014
The motion artifact is an ever-present challenge in the mobile monitoring of surface potentials. Skin-electrode impedance is investigated as an input parameter to detect the motion artifact and to reduce it using various methods. However, the impact of the used impedance measurement frequency on the relationship between measured impedance and ...
Ahmed Daniel D Department of Engineering Science and Mechanics, ‡Biomedical Engineering, §Department of Chemistry, The Pennsylvania State University , University Park, Pennsylvania 16802, United - - 2014
Eliciting a cellular response to a changing chemical microenvironment is central to many biological processes including gene expression, cell migration, differentiation, apoptosis, and intercellular signaling. The nature and scope of the response is highly dependent upon the spatiotemporal characteristics of the stimulus. To date, studies that investigate this phenomenon have ...
Jelínková Ivana I Department of Anatomy and Biomechanics, Faculty of Sport and Physical Education, Charles University, Prague, Czech - - 2014
Actual studies show increasing poor posture especially in the cervical-thoracic spine. The aim of this study was to develop a model-based evaluation of posture and the amount of segmental spinal movement using a simple movement test. Twenty-five subjects with forward head posture were recruited. We were interested in the external ...
Mertens Griet G *University Department Otorhinolaryngology, Head and Neck Surgery, Antwerp University Hospital, Edegem; and †Faculty of Medicine, Antwerp University, Antwerp, - - 2014
Single-sided deaf (SSD) patients report multiple benefits after cochlear implantation (CI), such as tinnitus suppression, speech perception, and sound localization. The first single-unit speech processor, the RONDO, was launched recently. Both the RONDO and the well-known behind-the-ear (BTE) speech processor work on the same audio processor platform. However, in contrast ...
Lei Liwen L School of Materials Science and Engineering, Wuhan University of Technology, 188 Luoshi Road, Hubei, P. R. China. - - 2014
Nanosized C3N4/BiOCl composites were synthesized via a facile method in the presence of arabic gum. Arabic gum acts as the structure-directing agent and helps the formation of BiOCl nanoparticles. A significant enhanced photodegradation is observed and a possible mechanism is proposed by combining photosensitization and photocatalysis.
Niwase Hiroaki - - 2014
We propose a real-time spatiotemporal division multiplexing electroholography utilizing the features of movies. The proposed method spatially divides a 3-D object into plural parts and periodically selects a divided part in each frame, thereby reconstructing a three-dimensional (3-D) movie of the original object. Computer-generated holograms of the selected part are ...
Cao Pu - - 2014
In this paper, a temporal shift unwrapping technique is presented for solving the problem of shift wrapping associated with spatial shift estimation (SSE)-based fringe pattern profilometry (FPP). Based on this technique, a novel 3D shape measurement method is proposed, where triangular patterns of two different spatial frequencies are projected. The ...
Conte S S Agriculture and Agri-Food Canada, Dairy and Swine R&D Centre, Sherbrooke, - - 2014
The objective was to assess sows' lameness by measuring weight distribution on limbs using a force plate made up of 4 individual platforms each resting on 4 single-ended beam load cells. The weight was recorded at an average rate of 14 readings per s over a 15 min period. Ten ...
Lee Dong Yeon DY Department of Orthopedic Surgery, Seoul National University Hospital, Seoul, Korea Department of Orthopedic Surgery, University of Pennsylvania, Philadelphia, PA, USA - - 2014
Radiographic examination is a widely used evaluation method in the orthopedic clinic. However, conventional radiography alone does not reflect the dynamic changes between foot and ankle segments during gait. Multiple 3-dimensional multisegment foot models (3D MFMs) have been introduced to evaluate intersegmental motion of the foot. In this study, we ...
Keshmiri Armin A Department of Orthopaedic Surgery, University of Regensburg, Kaiser-Karl-V Allee 3, 93077, Bad Abbach, Germany, - - 2014
Component malrotation has a major impact on patellar kinematics in total knee arthroplasty. The influence of natural rotational limb alignment on patellar kinematics is unclear so far. Based on recent clinical investigations, we hypothesized that rotational limb alignment significantly influences patellar kinematics. Patellar kinematics of ten cadaveric knees was measured ...
Hammarberg M M Department of Clinical Sciences, Swedish University of Agricultural Sciences, SE-75007 Uppsala, - - 2014
Lungeing is an important part of lameness examinations since the circular path may accentuate low-grade lameness. Movement asymmetries related to the circular path, to compensatory movements, and to pain, make the lameness evaluation complex. Scientific studies have shown high inter-rater variation when assessing lameness during straight line movement. The aim ...
Borcia Rodica - - 2014
We discuss a mechanism for controlled motion of drops with applications for micro-fluidics and micro-gravity. The mechanism is the following: a solid plate supporting a liquid droplet is simultaneously subject to lateral and vertical harmonic oscillations. In this way the symmetry of the back-and-forth droplet movement along the substrate under ...
Ekdale Eric G EG Department of Biology, San Diego State University, San Diego, CA, USA; Department of Paleontology, San Diego Natural History Museum, San Diego, CA, - - 2014
The evolution of hearing in cetaceans is a matter of current interest given that odontocetes (toothed whales) are sensitive to high frequency sounds and mysticetes (baleen whales) are sensitive to low and potentially infrasonic noises. Earlier diverging stem cetaceans (archaeocetes) were hypothesized to have had either low or high frequency ...
Wu Amy P AP New York Center for Voice and Swallowing Disorders, Department of Otolaryngology-Head and Neck Surgery, St Luke's-Roosevelt Hospital, New York, New York, - - 2014
No accepted standard exists for the diagnosis of vocal fold paresis (VFP). Laryngeal specialists are surveyed to establish expert opinion on diagnostic methodology and criteria. Study Design: Cross-sectional survey. Questionnaires were distributed at laryngology conferences in fall 2013. Responses were collated anonymously and subjected to cross-tabulated data analysis. Fifty-eight responses ...
Jacobs David S DS Department of Biological Sciences, University of Cape Town, Rondebosch, South - - 2014
The skulls of animals have to perform many functions. Optimization for one function may mean another function is less optimized resulting in evolutionary trade-offs. Here we investigate whether a trade-off exists between the masticatory and sensory functions of animal skulls using echolocating bats as model species. Several species of rhinolophid ...
1 2 3 4 5 6 7 8 9 10 >