Sökning: "Hellström Thomas"

Visar resultat 11 - 13 av 13 avhandlingar innehållade orden Hellström Thomas.

  1. 11. Automation in forestry : development of unmanned forwarders

    Författare :Ola Ringdahl; Thomas Hellström; Tomas Nordfjell; Arto Visala; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Computer science; Datavetenskap; Forest engineering; Skogsteknik; computer and systems sciences; data- och systemvetenskap;

    Sammanfattning : For the last 50 year, forestry operations have become more and more mechanized. In modern forestry in Europe two machines are typically used; a harvester that fells, debranches and cross-cuts the trees into logs and a forwarder that transports them to the nearest road. LÄS MER

  3. 12. Techniques and Algorithms for Autonomous Vehicles in Forest Environment

    Författare :Ola Ringdahl; Thomas Hellström; Jürgen Burstler; Hans Gripentrog; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Autonomous navigation; Robotics; Obstacle avoidance; Computer science; Datavetenskap;

    Sammanfattning : This thesis describes an ongoing project of which the purpose is designing and developing techniques and algorithms for autonomous off-road vehicles. The focus is on some of the components necessary to accomplish autonomous navigation, which involves sensing and moving safely along a user-defined path in a dynamic forest environment. LÄS MER

  4. 13. Take a risk : social interaction, gender identity, and the role of family ties in financial decision-making

    Författare :Emma Zetterdahl; Thomas Aronsson; Niklas Hanes; Jörgen Hellström; Paolo Sodini; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Asset allocation; Behavioral finance; Divorce; Financial literacy; Financial risk-taking; Gender identity; Household finance; Panel data; Propensity score matching; Risky asset share; Risk aversion; Saving behavior; Stock market participation; Social interaction; Trust; Economics; nationalekonomi;

    Sammanfattning : This thesis consists of an introductory part and four self-contained papers related to individual financial behavior and risk-taking in financial markets.In Paper [I] we estimate within-family and community social interaction effects upon an individual’s stock market entry, participation, and exit decision. LÄS MER