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Majumdar Deepti - - 2010
Manual load carriage is a universal activity and an inevitable part of the daily schedule of a soldier. Indian Infantry soldiers carry loads on the waist, back, shoulders and in the hands for a marching order. There is no reported study on the effects of load on gait in this ...
Brouhard Gary J - - 2010
What happens when two types of kinesin transport the same cargo? Each motor experiences a load coming from the others. These loads are sufficient to explain the emergent properties of the cargo's motion.
Wang Wei - - 2010
The modes in a circular metallic waveguide loaded with a high permittivity dielectric rod may possess similar dispersion relations to the modes in the left-handed metamaterial (LHM) waveguide. Therefore such dielectric-loaded metallic waveguide may also support slow light with parameters properly selected. The slow light in the GaAs-rod-loaded metallic waveguide ...
Moll Karin - - 2010
Grass-cutting ants (Atta vollenweideri) carry leaf fragments several times heavier and longer than the workers themselves over considerable distances back to their nest. Workers transport fragments in an upright, slightly backwards-tilted position. To investigate how they maintain stability and control the carried fragment's position, we measured head and fragment positions ...
Smith Benjamin - - 2010
The carrying of extra weight can cause significant injuries. This extra weight can be in the form of an external load carried by an individual or excessive body weight carried by an overweight individual. This study attempts to define the differences in lower body gait patterns caused by either external ...
Nadermann Nichole - - 2010
In this paper, we study the stability of an initially straight elastic fibril clamped at one end, while the other end is subjected to a constant normal compressive force and a prescribed shear displacement. We found the buckling load of a sheared fibril to be always less than the Euler ...
García-López David - - 2010
This study was undertaken to examine the role of interset stretching on the time course of acceleration portion AP and mean velocity profile during the concentric phase of 2 bench-press sets with a submaximal load (60% of the 1 repetition maximum). Twenty-five college students carried out, in 3 different days, ...
Ravosa Matthew J - - 2010
Considerable research on the scaling of loading patterns in mammalian locomotor systems has not been accompanied by a similarly comprehensive analysis of the interspecific scaling of loading regimes in the mammalian masticatory complex. To address this deficiency, we analyzed mandibular corpus bone strain in 11 mammalian taxa varying in body ...
Hunt Michael A - - 2010
Joint loading has been implicated in the pathogenesis of knee osteoarthritis (OA). While compartment-specific measures such as the knee adduction moment have received much attention in the literature, less is known about other measures of dynamic loading in this patient population. This cross-sectional study assessed strength and walking patterns of ...
Frossard Laurent Alain - - 2010
Falling represents a health risk for lower limb amputees fitted with an osseointegrated fixation mainly because of the potential damage to the fixation. The purpose of this study was to characterize a real forward fall that occurred inadvertently to a transfemoral amputee fitted with an osseointegrated fixation while attending a ...
Gavin Joseph - - 2010
Two highly instrumented homes have been ensonified by low-amplitude sonic booms. The resulting measurements have been analyzed (1) to gain insight to the dominant physical acoustics associated with sonic booms heard indoors and (2) to rank order the mechanisms needed for high-quality auralizations. The mechanisms turn out to be both ...
Di Luca M - - 2011
Spring compliance is perceived by combining the sensed force exerted by the spring with the displacement caused by the action (sensed through vision and proprioception). We investigated the effect of delay of visual and force information with respect to proprioception to understand how visual-haptic perception of compliance is achieved. First, ...
You Jian - - 2010
We report dual-functional hollow gold nanospheres (HAuNS, approximately 40-nm diameter) capable of mediating both photothermal ablation of cancer cells and drug release upon near-infrared (NIR) light irradiation. As high as 63% DOX by weight ( approximately 1.7 microg DOX/microg Au) could be loaded to polyethylene glycol (PEG)-coated HAuNS since DOX ...
Su Wei-Ren - - 2010
PURPOSE: To investigate the biomechanical effects of posterosuperior rotator cuff tear (RCT) size and of loading the long biceps tendon in the presence of various-sized RCTs. METHODS: Ten cadaveric shoulders were subjected to loading in the superior and anterosuperior directions in the intact state and with sequentially larger RCTs. Glenohumeral ...
Keim Terra - - 2010
This study aims to fundamentally understand the polymer network formed by poly(ethylene glycol) diacrylate (PEGDA) MW 700 and 3-methoxypropylamine (3MOPA) as well as to characterize the degradation response of this material with and without applied cyclic stress. Macromer reaction chemistry was confirmed by (1)H NMR measurements. UV calorimetry analysis revealed ...
Ghazal Muhamad - - 2010
To evaluate the influence of loading forces on the vertical discrepancies caused by interocclusal recording materials. A custom-made apparatus was used to simulate the maxilla and mandible. Eight interocclusal records were made in each of the following groups: G1-Aluwax (aluminum wax; Aluwax), G2-Beauty Pink wax (hydrocarbon wax compound; Miltex), G3-Futar ...
Powers Christopher M - - 2010
Since the direction of the quadriceps force and location of the patellofemoral contact point likely differ between axial and multiplane loadings, the force and moment balance solutions for a multiplane loading condition may not yield the same patella ligament force/quadriceps force ratio (F(PL)/F(Q) ratio) when compared with an axial loading ...
Birrell Stewart A - - 2010
Military personnel carry their equipment in load carriage systems (LCS) which consists of webbing and a Bergen (aka backpack). In scientific terms it is most efficient to carry load as close to the body's centre of mass (CoM) as possible, this has been shown extensively with physiological studies. However, less ...
Gramstad Gregory G - - 2010
This study was designed to quantify tensile forces within the intra-articular long head of the bicep tendon (LHBT) under conditions of passive limb positioning and physiologic load, which simulate contraction of the LHBT. A force probe was inserted into the intra-articular LHBT, just distal to its supra-glenoid origin, in six ...
Kulas Anthony S - - 2010
Because anterior cruciate ligament (ACL) injuries can occur during deceleration maneuvers, biomechanics research has been focused on the lower extremity kinetic chain. Trunk mass and changes in trunk position affect lower extremity joint torques and work during gait and landing, but how the trunk affects knee joint and muscle forces ...
Frost David M - - 2010
Using an indirect means to identify the end of the concentric phase during a ballistic effort may over/underestimate calculations requiring an accurate definition of this position. Thirty men performed 4 ballistic bench press repetitions at 6 relative loads. Kinematic and kinetic data were acquired with a position transducer and portable ...
Zhang Xi A - - 2010
Unilateral load carriage is more hazardous to the musculoskeletal system than bilateral load. The purpose of this study was to examine the effect of such asymmetric carriage on postures and gait symmetry in ground reaction force (GRF) during walking. Kinematics and GRF of 19 adults were recorded while they walked ...
Zec Michelle L - - 2010
Ligaments are regularly subjected to repetitive loading in vivo. Typically, mechanical studies focus on repetitive loading protocols of short duration, while those characterizing damage accumulation over a longer duration (i.e., fatigue studies) are lacking. The aims of this study were as follows: (a) to demonstrate that damage does accumulate in ...
Arregui-Dalmases Carlos - - 2010
The purpose of this study was to investigate the response and failure properties of the transverse and spinous vertebral processes under cantilever bending. Twelve human third lumbar vertebrae (L3) were harvested from donors aged 56-79 years, and the processes were loaded in either dynamic (1000 mm/s) or quasi-static (1 mm/s) ...
Sharma Prashant K - - 2010
Mechanics of materials is the science of forces applied on a body and response of the body in terms of deformation. Different type of loadings on bodies with different geometries or made of different material give rise to different deformations. Last but not the least, this science allows to predict ...
Salipur Zdravko - - 2010
Proper securement of wheelchairs in motor vehicles is vital to providing wheelchair users an adequate level of safety in a crash. Thus far, wheelchair tiedown and occupant restraint systems (WTORS) loading has mostly been examined under frontal impact conditions. Because of the inherent crash dynamic differences, rear-impact loading of WTORS ...
Cheng Fang-Hsin - - 2010
The role of the vertebral body's rotation and the loading conditions of the brace has not been clearly identified in adolescent idiopathic scoliosis. This study aimed to implement a finite element (FE) model of C-type scoliotic spines to investigate the influence of different loading conditions on variations of Cobb's angle ...
Pialasse Jean-Philippe - - 2010
The flexion relaxation phenomenon (FRP) represents a well-studied neuromuscular response that occurs in the lumbar and cervical spine. However, the cervical spine FRP has not been investigated extensively, and the speed of movement and loading effects remains to be characterized. The objectives of the present study were to evaluate the ...
Gu Xiang Ian XI Department of Biomedical Engineering, The City College of The City University of New York, Steinaman Hall T-565, 140th Street and Convent Avenue, New York, NY 10031, - - 2010
The influence of biomechanical stimuli on modulating cartilage homeostasis is well recognized. However, many aspects of cellular mechanotransduction in cartilage remain unknown. We developed a computer-controlled joint motion and loading system (JMLS) to study the biological response of cartilage under well-characterized mechanical loading environments. The JMLS was capable of controlling ...
Pagonis Tom C TC Advanced Graduate Endodontics, Division of Endodontics, Harvard School of Dental Medicine, Boston, Massachusetts, - - 2010
To study the in vitro effects of poly(lactic-co-glycolic acid) (PLGA) nanoparticles loaded with the photosensitizer methylene blue (MB) and light against Enterococcus faecalis (ATCC 29212). The uptake and distribution of nanoparticles in E. faecalis in suspension was investigated by transmission electron microscopy (TEM) after incubation with PLGA complexed with colloidal ...
Brandauer B - - 2010
Various studies showed a clear impairment of cerebellar patients to modulate grip force in anticipation of the loads resulting from movements with a grasped object. This failure corroborated the theory of internal feedforward models in the cerebellum. Cerebellar damage also impairs the coordination of multiple-joint movements and this has been ...
Aarnisalo Antti A AA Eaton-Peabody Laboratory, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA. - - 2009
To assess the effects of thickness and position of cartilage used to reconstruct the tympanic membrane (TM) using a novel technique, time-averaged laser holography. Cartilage is commonly used in TM reconstruction to prevent formation of retraction pockets. The thickness, position, and shape of the cartilage graft may adversely affect TM ...
Matsuura R - - 2011
Objectives To determine the effects of resistive load on performance and surface electromyogram (SEMG) activity during repeated cycling sprints (RCS) on a non-isokinetic cycle ergometer. Methods Participants performed two RCS tests (ten 10-second cycling sprints) interspersed with both 30- and 360-second recovery periods under light (RCS(L)) and heavy load conditions ...
Walter E Jane - - 2010
Mechanical loading conditions are important factors in the gestational development of fetal tissues. However, little is known about how mechanical loading during development modulates the structure and function of elastic tissues. We hypothesized that developing elastic tissues functionally adapt to their loading conditions. To test this hypothesis, we assessed the ...
Ghazzawi Ahmad - - 2009
Kager's fat pad is located in Kager's triangle between the Achilles tendon, the superior cortex of the calcaneus, and flexor hallucis longus (FHL) muscle and tendon. Its biomechanical functions are not yet established, but recent studies suggest it performs important biomechanical roles as it is lined by a synovial membrane ...
Godfrey Stephanie S - - 2010
Understanding the impacts of endemic parasites on protected hosts is an essential element of conservation management. However, where manipulative experiments are unethical, causality cannot be inferred from observational correlative studies. Instead, we used an experimental structure to explore temporal associations between body condition of a protected reptile, the tuatara (Sphenodon ...
Birrell Stewart A - - 2009
The 3-D gait analysis of military load carriage is not well represented, if at all, within the available literature. This study collected 3-D lower limb kinematics and spatiotemporal parameters in order to assess the subsequent impact of carrying loads in a backpack of up to 32 kg. Results showed the ...
Kent Richard W - - 2010
The objective of this study was to document the motion and potential injury mechanisms of obese occupants in frontal car crashes compared to a control group of nonobese occupants in controlled laboratory impacts. Eight cadavers were divided into obese (n = 3) and a nonobese (n = 5) groups and ...
Matthews Martyn - - 2009
The aim of this study was to investigate the acute effect of high-load and low-load complex training on upper-body performance-determined by the flight time of a basketball push-pass. Twelve competitive male athletes (21.8 +/- 4.5 years, 82.0 +/- 11.7 kg, 181.6 +/- 5.6 cm), with at least 6 months weight ...
P?rez-Caballero G - - 2009
The capability of single-reflection near-IR (NIR) spectroscopy to differentiate, characterize and monitor the fate of a set of hydrocarbons spilled in the marine environment was compared with that of multiple-reflection horizontal attenuated total reflection mid-IR (ATR-MIR) spectroscopy. Multivariate pattern recognition techniques [principal component analysis (PCA), multivariate polynomial regression, cluster analysis ...
Lumpkins Sarah B - - 2009
Evidence from experimental and finite element studies have shown that the temporomandibular joint disc is heavily loaded during normal physiological function. Several studies have been carried out to investigate the response of the disc to tensile and static compressive forces. However, there is limited information that elucidates the dynamic characteristics ...
Lemasson B H - - 2009
We explore mechanisms associated with collective animal motion by drawing on the neurobiological bases of sensory information processing and decision-making. The model uses simplified retinal processes to translate neighbor movement patterns into information through spatial signal integration and threshold responses. The structure provides a mechanism by which individuals can vary ...
Lee Minhyung - - 2009
Load carriage is a very common daily activity at home and in the workplace. Generally, the load is in the form of an external load carried by an individual, it could also be the excessive body mass carried by an overweight individual. To quantify the effects of carrying extra weight, ...
Kaiser Jeanette - - 2010
PURPOSE: The aim of this study was to determine the loading efficiency, physicochemical stability, and release of irinotecan-loaded DC Beads (bead size 100-300 microm, 300-500 microm) before and after mixing with nonionic contrast medium (Accupaque 300, Imeron 300, Ultravist 300) during a prolonged period of time (28 days) when stored ...
Silver Tobin - - 2009
Powerlifting, like many sports, uses specialized equipment to enhance performance and decrease the chance of injury. The purpose of this exploratory study was to determine whether wearing a bench press shirt would alter the natural mechanics of the bench press, causing a more efficient lift when pressing the same weight ...
Boxberger John I JI Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA 19104-6081, - - 2009
The intervertebral disc functions over a range of dynamic loading regimes including axial loads applied across a spectrum of frequencies at varying compressive loads. Biochemical changes occurring in early degeneration, including reduced nucleus pulposus glycosaminoglycan content, may alter disc mechanical behavior and thus may contribute to the progression of degeneration. ...
Patterson Carson - - 2009
The purpose of this paper was to investigate the power-load relationship and to compare power variables and bilateral force imbalances between sexes with squat jumps. Twenty men and 17 women, all members of the Austrian alpine ski team (junior and European Cup), performed unloaded and loaded (barbell loads equal to ...
Sumners David Paul - - 2009
To investigate whether 30 breaths performed against a high-frequency airway occlusion stimulus modulates ventilatory control both within-phase (within the phase of breathing that the stimulus was presented) and opposite-phase (in the opposite-phase of breathing to that in which the stimulus was presented) of the respiratory cycle. Ten healthy subjects (3 ...
Ben-Masaud AbdAllah - - 2009
The motor control system may compensate for lumbar instability following cyclic work with differential response to load magnitude. In vivo felines were exposed to a cumulative 1 h of cyclic work at 0.25 Hz. One group exposed to light whereas the second to heavy load while recording lumbar displacement and ...
Preiss-Bloom Orahn - - 2009
Mechanical stimulation improves tissue-engineered cartilage development both in terms of biochemical composition and structural properties. However, the link between the compositional changes attributed to mechanical stimulation and the changing structural properties of the engineered cartilage is poorly understood. We hypothesize that transient events associated with construct stiffening can be documented ...
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