Sökning: "accelerometer"

Visar resultat 11 - 15 av 92 avhandlingar innehållade ordet accelerometer.

1. 11. Capturing travel entities to facilitate travel behaviour analysis : A case study on generating travel diaries from trajectories fused with accelerometer readings

   Författare :Adrian Corneliu Prelipcean; Yusak Octavius Susilo; Gyözö Gidofalvi; Stefan van der Spek; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; travel diary automation; trajectory segmentation; travel data collection; travel diary collection system evaluation and comparison; Geodesy and Geoinformatics; Geodesi och geoinformatik;

   Sammanfattning : The increase in population, accompanied by an increase in the availability of travel opportunities have kindled the interest in understanding how people make use of the space around them and their opportunities. Understanding the travel behaviour of individuals and groups is difficult because of two main factors: the travel behaviour's wide coverage, which encompasses different research areas, all of which model different aspects of travel behaviour, and the difficulty of obtaining travel diaries from large groups of respondents, which is imperative for analysing travel behaviour and patterns. LÄS MER

3. 12. Micromachined Three-Axis Accelerometers and Sensor Readout Electronics

   Författare :Henrik Rödjegård; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; three axis accelerometer; sensor readout; inertial sensors; gyroscope; MEMS; digital feedback; capacitive readout;

   Sammanfattning : Miniaturized, MEMS-based, inertial navigation systems are used to track the position of moving objects without an external reference system. Several existing and future applications such as indoor navigation, stability control of vehicles, active prostheses or training aids for sportsmen would benefit from the small size and the low cost of micromachined inertial sensors. LÄS MER

4. 13. Towards Model-Based Condition Monitoring of Railway Switches and Crossings

   Författare :Marko Milosevic; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sleeper void; Switches crossings; condition indicators; embedded sleeper accelerometer; multi-body simulations; dynamic vehicle–track interaction; MBS; S C; wheel–rail contact forces; condition monitoring; crossing rail geometry; displacement reconstruction.; model calibration;

   Sammanfattning : Railway switches and crossings (S&C, turnouts) connect different track sections and create a railway network by allowing for trains to change between tracks. This functionality comes at a cost as the load-inducing rail discontinuities in the switch and crossing panels cause much higher degradation rates for S&C compared to regular plain line track. LÄS MER

5. 14. Energy expenditure and accelerometer cut-points for sedentary behavior and physical activity in spinal cord injury : implication for guiding and prevention

   Författare :Tobias Holmlund; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Background: A motor-complete spinal cord injury (SCI) alters the prerequisites for physical activity (PA) and subsequently energy expenditure. Persons with SCI above thoracic level six have a compromised physiological response, which further compromises energy expenditure, during exercise. LÄS MER

7. 15. Physical Activity among Adolescents in a Swedish Multicultural Area : An Empowerment-Based Health Promotion School Intervention

   Författare :Andreas Fröberg; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Accelerometer; Adolescents; Empowerment; Health promotion; Intervention; Participatory; Physical activity; School; Shared decision making; Socioeconomic;

   Sammanfattning : The overarching aim of the present thesis was two-fold. The first aim was to describe and critically reflect upon the experiences of developing and implementing an empowerment-based school intervention, focusing on food and physical activity, involving adolescents from a Swedish multicultural area characterized by low socioeconomic status. LÄS MER