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dc.contributor.authorMorris, Tyler Pierceen_US
dc.date.accessioned2019-11-30T07:00:14Z
dc.date.available2019-11-30T07:00:14Z
dc.date.issued2018-06-07
dc.identifier.othervt_gsexam:15108en_US
dc.identifier.urihttp://hdl.handle.net/10919/95889
dc.description.abstractMore than 19 million children participate in youth baseball and softball annually. Although baseball and softball are not commonly depicted as contact sports in the, according to the U.S. CPSC baseball and softball were responsible for 11.6% of all head injuries treated in emergency rooms in 2009; third most behind only cycling and football. Ball impact has been identified as the leading cause of injury in baseball and softball, with the most frequent injury resulting from a ball impacting the head. Reduced injury factor balls, infield softball masks, batter's helmets, and catcher's masks have all been integrated into baseball and softball as a means for preventing serious head injury from ball impact. The research in this thesis had four objectives: to compare the responses of the Hybrid III and NOCSAE headforms during high velocity projectile impacts, to compare head injury risk across a range of baseball stiffness designed for different age groups, to evaluate the effectiveness of infielder softball masks' ability to attenuate facial fracture risk, and to describe a novel methodology to evaluate the performance of batter's helmets and catcher's masks. Results of these research objectives determined the most suitable ATD headform to evaluate head injury risk for high velocity projectile impacts, provided a framework for determining the optimal age-specific ball stiffness and optimal infield mask design, and disseminated STAR ratings for batter's helmets and catcher's masks to the public. The research presented in this thesis can be used to further improve safety in baseball and softball.en_US
dc.format.mediumETDen_US
dc.publisherVirginia Techen_US
dc.rightsThis item is protected by copyright and/or related rights. Some uses of this item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).en_US
dc.subjecthead impactsen_US
dc.subjectfrequencyen_US
dc.subjectlinearen_US
dc.subjectrotationalen_US
dc.subjectaccelerationen_US
dc.subjectbiomechanicsen_US
dc.titleEvaluating the Head Injury Risk Associated with Baseball and Softballen_US
dc.typeThesisen_US
dc.contributor.departmentDepartment of Biomedical Engineering and Mechanicsen_US
dc.description.degreeMSen_US
thesis.degree.nameMSen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineBiomedical Engineeringen_US
dc.contributor.committeechairRowson, Stevenen_US
dc.contributor.committeememberDuma, Stefan M.en_US
dc.contributor.committeememberBrolinson, Per Gunnaren_US


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