Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 105 for “"helmet"”.
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Head Acceleration Measurements in Helmet-Helmet Impacts and the Youth Population
… of acceleration measurements of the head during helmet-helmet impacts, where a player's helmet impacts another player's helmet, and with a youth population in football. This research is aimed at advancing current understanding of impact biomechanics for two specialized groups. The first study is …
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Effect of Football Helmet and Football Helmet/Skull Cap Combination on Core Temperature
… was to determine the effect of a football helmet and a football helmet/skull cap combination increases core body temperature in an exercising athlete. Secondary investigative questions considered the effect of football helmet and football helmet/skull cap combination on interior football …
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Design of a Transforming MTB Helmet
… themselves preferring the comfort of a trail helmet in certain conditions, and the safety of a full-face mountain bike helmet in others. Presently, in order to resolve this issue, riders are forced to choose between bringing two helmets or using currently-existing "transforming" products with …
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Mitigating Concussion: An Innovative Football Helmet
Helmets are the primary safety devices for various sports, including football. A well-designed helmet is generally believed to be effective protection against head injuries and concussions. However, there are a multitude of cases where the helmet has failed in protecting the player, resulting in …
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Concept design for a folding bicycle helmet
"""A Bicycle Helmet for Commuters"" chronicles the designer’s industrial design research and concept development effort for fulfilling some requirements of Master Degree of Fine Arts (MFA) at the University of Illinois at Urbana-Champaign. A research and design development effort has created a new …
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The History and Development of the Football Helmet
… the history and development of the football helmet in its origin and evolution, the study related the changes in design of football headgear, humorous photographic plates included throughout the chronicled data depict graphically the changes which occurred. These photographs provide a proper …
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Physical Testing of Potential Football Helmet Design Enhancements
… about the design. In order to fully test the helmet design; however, full scale testing was required. In order to carry out this testing a drop tower was built based on National Operating Committee on Standards for Athletic Equipment, NOCSAE, specification. The drop tower designed for Cal Poly …
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Accelerated computational modeling of ballistic helmet test protocols
In modern combat, helmets play a vital role in protecting the head. Before being delivered to the soldier, combat helmets undergo a series of tests to determine their threat mitigation performance. During ballistic testing, current combat helmet test protocols use clay to record the helmet backface …
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Quantifying the Effect of Helmet Fit on Performance
… important factor to consider when selecting a helmet. However, there is no published biomechanical evidence suggesting that of helmet fit effects concussion risk. The objectives of this study were to quantify helmet fit on a headform and to determine the effect fit has on helmet performance. An …
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Head Impact Conditions and Helmet Performance in Snowsports
… rotational kinematics of head impact. Currently helmet testing standards don't consider these rotational kinematics, or varying friction conditions that potentially occur in real-world scenarios. The purpose of this study is to investigate the head impact conditions in a snowsport environment to …
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Quantifying the Characteristics of Real-World Bicycle Helmet Impacts
… head injury while cycling is to wear a bike helmet. Bike helmets are designed to decrease the linear acceleration of the head, decreasing the rider's risk of severe head injuries, such as skull fracture. In order to sell a bike helmet, it must meet a minimum standard of protection based on …
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Head Impact Biomechanics and Helmet Performance in Youth Football
… players and the performance of youth football helmets. The results of the studies presented provide a foundation for researchers, football leagues, and helmet manufactures to implement changes and modifications that aim to reduce concussion risk in youth athletes. The first study presented in …
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Helmet Use Among Skiers and Snowboarders in Southern Alberta
… care system, and may be prevented by encouraging helmet use. Helmet effectiveness is well established, but there are little recent data on ski and snowboard helmet prevalence at ski areas in southern Alberta, with no published reports on correct helmet fit. This study determined the prevalence of …
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Using Laboratory Impact Devices to Quantify Football Helmet Performance
… equipment. The first use of a football helmet was in 1893, made of leather and designed to reduce the risk of skull fracture. Initially, football helmets were intended to protect a player against the most severe hits they would experience on the field. More recently, it has been shown …
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Applying the Health Belief Model to Michigan motorcyclist helmet use
<p>Helmets can offer significant injury protection to motorcyclists, yet usage is inconsistent across the United States. In 2012, the state of Michigan switched from a universal helmet law to partial helmet law. Michigan motorcyclists (<em>n</em> = 76) were recruited through two motorcycling events …
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Analysis of Composite Helmet Impact by the Finite Element Method
… element method transient deformations of a helmet mounted on a Roma Plastilina #1 clay-filled rigid and stationary headform. The helmet is made of a unidirectional fiber reinforced composite that is modeled as a linear elastic orthotropic material. Hashin's criteria are used to simulate the …
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Reduction of Helmet Buffeting in Open Cockpit, Single Seat Race Cars
… large aerodynamic forces which act on the helmet. These forces, specifically the aerodynamic buffeting of the helmet, reach levels which are very fatiguing and distracting to the driver, and are therefore unacceptable. Little investigation has been done in this area, because normal wind …
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Identifying factors associated with bicycle helmet use behavior among college students
… and are known to be less likely to wear bicycle helmets compared to with other age groups. The study aimed to examine behaviors, attitudes, subjective norms, past bicycle helmet use, bicycle-related injury, and risk perceptions with regard to bicycle helmet use among student bicycle riders at …
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Outcome Analysis of Helmet Therapy and Counter Positioning for Deformational Plagiocephaly
OBJECTIVE: To compare effectiveness between helmet therapy and counter positioning for deformational plagiocephaly (DP). METHOD: Retrospective data of children diagnosed with DP who visited our clinic from November 2010 to October 2012 were reviewed. The subjects who were 10 months of age or …
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