Sökning: "head direction"

Visar resultat 1 - 5 av 76 avhandlingar innehållade orden head direction.

1. 1. Finite Element Modeling of the Human Head

   Författare :Svein Kleiven; KTH; []
   Nyckelord :Finite element method FEM ; Human head; brain; head injury; epidemiology; statistics; simulations.;

   Sammanfattning : The main objectives of the present thesis were to define the dimension of head injuries in Sweden over a longer period and to present a Finite Element (FE) model of the human head which can be used for preventive strategies in the future. The annual incidence of head injuries in Sweden between 1987 and 2000 was defined at over 22 000, cases most of which were mild head injuries. LÄS MER

3. 2. Physical Modeling of Brain and Head Kinematics

   Författare :Johan Ivarsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; brain injury; skull base; rotational acceleration; physical models; lateral ventricles; head kinematics; padding materials; sulci; free motion headform; brain kinematics;

   Sammanfattning : The development of head injury criteria and countermeasures for head protection requires understanding of how different factors affect brain and head kinematics. In this thesis, 2D physical models of the human head were developed and used to evaluate how various factors affect brain kinematics during angular head kinematics. LÄS MER

4. 3. Biomechanical assessment of head and neck movements in neck pain using 3D movement analysis

   Författare :Helena Grip; Gertjan Ettema; Umeå universitet; []
   Nyckelord :movement analysis; kinematics; helical axis; neck pain; whiplash; cervical spine; pattern classification; motor control; head-eye co-ordination; head movement; biomedicinsk strålningsvetenskap; Biomedical Radiation Science;

   Sammanfattning : Three-dimensional movement analysis was used to evaluate head and neck movement in patients with neck pain and matched controls. The aims were to further develop biomechanical models of head and neck kinematics, to investigate differences between subjects with non-specific neck pain and whiplash associated disorders (WAD), and to evaluate the potential of objective movement analysis as a decision support during diagnosis and follow-up of patients with neck pain. LÄS MER

5. 4. Investigation of Head Injuries in Car-to-Child Pedestrian Accidents

   Författare :Jianfeng Yao; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; injury mechanisms; head injury; child pedestrian; accident;

   Sammanfattning : Head injury is the most common injury type in child pedestrian accidents andcould lead to lifelong disability or even death. To protect child pedestrianfrom head injury, it is important to understand the head injury mechanismsand tolerance levels. LÄS MER

7. 5. Towards On-line Learning Agents for Autonomous Navigation

   Författare :Guang Li; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; path-finding; head direction; artificial neural network; spatial representation; on-line learning; navigation; localization; autonomous mobile robot; obstacle avoidance; place learning;

   Sammanfattning : The design of a mechatronic agent capable of navigating autonomously in a changing and perhaps previously unfamiliar environment is a very challenging issue. This thesis addresses this issue from both functional and system perspectives. LÄS MER