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Showing 1 to 20 of 25 for “"stress fracture"”.
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Stress, fracture, and microstructure development of drying aqueous particulate coatings
… However, aqueous particulate coatings develop stress during drying, making them prone to stress-induced defects such as cracking, curling, and delamination. Additionally, aqueous formulations often rely on latex particles to coalesce and form a continuous film at room temperature. In this work, …
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Effects of Marathon Training on Male and Female Femoral Stress Fracture Risk
<p>Marathon runners are prone to femoral stress fractures due to the high magnitudes and frequencies of lower extremity loads during training. Female runners tend to have a greater incidence of stress fracture compared to male runners. Sex-specific differences in body structure, joint pressure, and …
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Association of genotype with bone metabolism, skeletal adaptation and stress fracture injury occurrence
… effects of exercise on bone phenotypes, such as stress fracture injuries have been reported. Little is known about the extent of the genetic mediation of changes in bone characteristics, stress fracture injury and bone resorption in response to exercise. Accordingly, this thesis investigated: the …
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Predisposing Risk Factors Associated With Stress Fracture Development In Division I Cross Country Runners
… factors that could be associated with increased stress fracture development in division one collegiate cross country runners. Participants for this study consisted of 42 collegiate cross country runners at the University of Mississippi. A nutritional assessment consisting of a 3-day food record …
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The Role of Bisphosphonates and Osteoblast Lineage Cells in Promoting Osteogenic and Angiogenic Processes Necessary for Bone Repair
… is accelerated during injury such as full fracture and or stress fracture, where woven bone must rapidly form for successful repair and restoration of mechanical function. However, in 5-10% of all clinical fracture cases, bone formation is impeded and the fracture fails to heal leading to …
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Tibial-fibular morphology: variation, sexual dimorphism, and mechanical implications
Stress fractures are common injuries among runners and military personnel associated with the mechanical fatigue of load-bearing bone. The tibia is the most frequently fractured site and females are at much greater risk than males. Bone geometry and density are hypothesized risk factors for stress …
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An Investigation of Humeral Stress Fractures in Racing Thoroughbreds Using a 3D Finite Element Model in Conjunction with a Bone Remodeling Algorithm
… horse Thoroughbred is highly susceptible to stress fractures at a characteristic location as a result of cyclic loading. The propensity of a Thoroughbred to exhibit humeral fracture has made equines useful models in the epidemiology of stress fractures. In this study, a racing Thoroughbred …
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Damage accumulation of bovine bone under chaotic loading.
A stress fracture is a common injury that plagues many individuals. Since there is not currently a method to predict if a stress fracture will develop, this pilot study was conducted to determine if either the Palmgren-Miner rule (PMR) or phase space warping (PSW) could be used as a prediction …
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The Role of Gene Transcription and Inflammatory Cytokines in Bone Fracture Repair
… injury. However, in 5 to 10% of patients, fractures fail to properly heal resulting in non-union. A need exists for a more comprehensive understanding of the complex biology of fracture repair, which involves the coordinated work of many cell types including osteoblasts, osteoclasts, and …
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Effect of fatigue loading on impact response of rat ulna
Stress fracture is a common injury among athletes, such as basketball players. The occurrence of stress fracture is a consequence of both fatigue and impact loading of the bone that will potentially threat athletes’ careers. Scientists and engineers have studied the fatigue properties of many …
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Changes in Bone Mineral Density and Biomarkers of Bone Turnover with Calcium Supplementation During Initial Military Cadet Exercise Training
… and Japan. In the United States alone, hip fractures affect 500,000 individuals per year, and annual healthcare costs for osteoporotic fractures are approximately $14 billion. A high peak BMD can prevent or delay the onset of osteoporosis and its complications. Exercise and diet may affect …
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FRATTURE DA STRESS NEI TERSICOREI: PREVENZIONE E ITER DIAGNOSTICO TERAPEUTICO. ANALISI DEI FATTORI DI RISCHIO MEDIANTE QUESTIONARIO 'SELF REPORTED INJURY' E DATABASE CLINICO
STRESS FRACTURES IN BALLET DANCERS: OUR PREVENTION AND DIAGNOSTIC PROTOCOL. RISK FACTORS EVALUATION USING A SELF REPORTED INJURY QUESTIONNAIRE AND CLINICAL HISTORY DATA BASE. STUDY DESIGN: RETROSPECTIVE DESCRIPTIVE STUDY OBJECTIVE: WE PERFORMED A STUDY TO DESCRIBE OUR DIAGNOSTIC AND CLINICAL …
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Prediction of Fatigue Life in 7075-T6 Aluminum from Neural Network Analysis of Acoustic Emission Data
… failure mechanisms, plane strain and plane stress fracture, plus a third less prevalent mechanism. These results were employed to construct a back-propagation neural network to predict the number of cycles to failure from the first 250 cycles of AE data. Due to a scarcity of AE data, optimal …
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Neural Network Fatigue Life Prediction in 7075-T6 Aluminum from Acoustic Emission Data
… AE parameters: plastic deformation, plane strain fracture and mixed mode (plane strain and plane stress) fracture.</p> <p>Acoustic emission amplitude data from the twenty-four low cycle fatigue tests were used to train and test a back propagation neural network for prediction of cycles to failure. …
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The Incidence of Stress Fractures Among All Female Division I Athletes at Virginia Polytechnic Institute and State University
Stress fractures are common overuse injuries that have plagued athletes for many years. Often referred to as fatigue fractures, they are formed when the skeletal muscles fatigue and can no longer absorb the shock of repetitive pounding activities such as running. Stress fractures are most common in …
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Study of the physics of the power-scaling of end-pumped solid-state laser sources based on Nd:YVO<sub>4</sub>
… of scaling via amplifiers, finding that when stress-fracture and beam quality degradation are considered, Nd:YVO<sub>4</sub> represents an excellent choice for further power scaling.
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Mechanical Response Tissue Analysis: Inter- and Intra-trial Reliability in Assessing Bending Stiffness of the Human Tibia in College Aged Women
… and exercise-related clinical problems, e.g. stress fracture of the lower leg. To evaluate the inter- and intra-reliability of tibial EI, 22 healthy women (X + SD: 20.8 + 1.8 yr) were assessed twice daily for three non-consecutive days. Each daily session consisted of five repeated trials. The …
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The residual strength determination due to fatigue loading by fracture mechanics in notched composite materials
… by using a material modeling approach, fracture and fatigue mechanics and the finite element method (FEM). For simplicity, after thousands of cycles, the geometry of a circular hole of the deformed laminate was categorized as (1) uniformly expanded hole into elliptic shape, (2) crack …
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Power scaling of Tm:YLF-pumped Ho:YAG lasers
… the limitations set by the thermally-induced stress fracture when scaling output power of Tm:YLF lasers. In conjunction with the use of novel holmium cavity designs that allow the use of slab pump lasers, high-power Ho:YAG lasers are realised.<br/><br/>Conflicting requirements on the thulium …
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Multi-Watt, diode-pumped planar waveguide lasers
… temperature rises and slightly lower thermal stress fracture limits were predicted in a planar waveguide compared to an identical sized, but uniformly-pumped, bulk slab. <br/><br/>Advances in coupling diode-bar pump lasers to planar waveguides have been made. A 20W fibre-lensed diode-bar, …
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