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Biomechanical load analysis in case of child cyclist collision with passenger car
Schejbalová, Zuzana ; Lenková, Alžběta ; Mičunek, Tomáš
The safety of pedestrians and cyclists is justified especially in terms of prevention. This paper deals with the biomechanical analysis of load exerted on the child cyclist in configuration typical for cyclists (sudden enter the road or the case of non-giving way; the car front vs. the left side of the cyclists). Two tests were performed in the same configuration and nominal collision speed, the first one with a bicycle helmet and the second one without the helmet. Using the accelerometers in the head, chest, pelvis and knee of the dummy acceleration fields were detected, which is the cyclist exposed during the primary and secondary collision. In conclusion, the results will be interpreted by values of biomechanical load and severity of potential injuries including kinematic and dynamic comparison with a pedestrian vs. vehicle collision.
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Safety Equipment for Motorcyclists
Všianský, Michal ; Svítil, Petr (referee) ; Zdařil, Zdeněk (advisor)
In my thesis I looked for a solution to simplify the transfer and storage of motorcycle helmet. This is the helmet for smaller motorcycles for city traffic, where isn ´t often the sufficient space for helmet storage after the motorcycle is left. I choose this topic because the motorcycles are one of my main hobbies and I know how unpleasant is to move in the city, school or work always with the helmet in your hand because you cannot put it into your backpack or to the standard personal cabinets at school cloakrooms or in the factories. The helmet which I made will reduce its volume by folding approximately about 40% and it makes easier the transfer and enables putting into the storage space, cabinet or hand luggage /backpack, bag/ - as I know acc. to my experience the bikers carry with them. The skeleton and the helmet cushioning is divided into four parts /upper, two side and back/ which enable the folding. The cushioning of the side parts will fill the inside space of the upper part by simple folding, then the side skeleton will be inserted to the upper two-case part and in the last – back part, fixed to the rest of the helmet by the hinges, will fold into the helmet – it covers the above mentioned cushioning of the sides and so it protects its damage. The whole will be fixed by the tightening bend which is also used for helmet fixing on the head. In the dismanted status is everything saved by the locks which connect the back and side parts. The helmet skeleton was made of kevlar which compensates the added weight and also keeps the sufficient solidness. Because of double case enabling the saving of the side parts, the solidity and also the safeness are bitter then by using of normal helmet. The helmet shape is created in easy concept and aerodynamic shape. All details, blending and surface extrudation have the reason. In the bottom is the material enlarged because of locks , in the middle part the enlargement is used for breaking of hanging sides and the cleats on the outside enable the cooling and head airing. For the thesis presentation I make the model 1:1 which cannot be fold up. The skeleton is made with the help of 3D printing and after that colour treated. The cushioning milled on CNC machine of extrude polystyren will be refilled by soft foam and covered by the cloth. The shield protecting eyes will be vacuumed of colourless plastic.
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Design of bike helmet
Sojka, Vojtěch ; Sládek, Josef (referee) ; Křenek, Ladislav (advisor)
This bachelor´s thesis deals with design of bike helmet. Using of this helmet is aimed especially for race, but also for hobby riding. In the final design is created a helmet, which shape ties together with actual models, where the main emphasis is put on the innovative solution of shoring. The whole helmet with the binding mechanism is created as a model in a scale factor 1:1.
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Pre-Hospital Urgent Care of Injured Motorcyclists at Traffic Accidents
SEIDL, Miroslav
Currently every day a great number of traffic accidents happens in our roads. Some accidents are followed by very serious injuries, which must be treated quickly and right. Recently many motorcyclists have been in this group of the seriously wounded and this number is still increasing. At the scene of the accident paramedics shall give the right and fast first aid mostly to a young person and they often decide on his/her life, eventually on its next quality. Paramedics must it be able to take off a protective helmet in the right way, stabilize patient´s essential vital functions and diagnose eventual shock or polytrauma. However not all the injuries can be diagnosed by paramedics with the available equipment at the scene of the accident. A good result is guaranteed in the increasing tendency of this accident rate first of all with paramedics continuous training at this specific problems. The aim of the bachelor thesis is an analysis of pre-hospital urgent care of injured motorcyclists at traffic accidents and set standard for treatment of these casualties by paramedics. The sample of respondents is represented by staff members of Health Rescue Service of South Bohemian Region and staff members of the Traumatological department of the Nemocnice České Budějovice, a.s. The data collection was performed by the methods of questioning, guided conversation and secondary data analysis. The research was performed in March 2010. Pursuant to the performed research the following hypotheses have been determined and the standard for treatment of an injured motorcyclist by paramedics has been created. Hypothesis 1: Paramedics use immobilizing tools in case of an injured motorcyclist in the right way. Hypothesis 2: Paramedics cannot take off the protective helmet in case of an injured motorcyclist in the right way.
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Numerické modelování ochranných sportovních přileb
Kunecký, Jiří ; Jíra, J.
The paper describes development of advanced methods used in research of protective devices. Explicit FE analysis is used for modeling of drop tests. Drop tests are one of common testing procedures used in the standards and are intended for testing of device's protective properties. If we were able to assess the acceleration history from numerical analysis with given geometry and material properties, we can also perform optimization procedure and design optimal protective helmet.
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