@phdthesis{Will2017,
  author    = {Will, Sebastian},
  title     = {Rotierende vs. oszillierende retrograde Kanalaufbereitung bei Wurzelspitzenresektionen : eine intern vergleichende methodische Langzeitstudie 1997 - 2010},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-152710},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2017},
  abstract  = {In einem internen Studie wurde der Langzeiterfolg der Methode der oszillierenden retrograden Wurzelkanalaufbereitung mithilfe von Schall- oder Ultraschalltechnologie mit der rotierenden Methode mit Mikrorosenbohrern verglichen. Die Erfolgsauswertung erfolgte retrospektiv nach klinischen und radiologischen Kriterien. Untersucht wurden insgesamt 378 Pr{\"a}molaren, 185 f{\"u}r die oszillierende und 193 f{\"u}r die rotierende Methode, die vom selben Behandler unter einheitlichen technischen und anatomischen Bedingungen sowie unter einheitlichen Operations- und Qualit{\"a}tsstandards operiert wurden. Die Erfolgswahrscheinlichkeit der oszillierenden Kanalaufbereitung betrug nach einem Jahr 91,2\%, nach zwei Jahren 89,4\%, nach drei Jahren 86,3\%, nach f{\"u}nf Jahren 79,1\% sowie nach acht Jahre 76,5\%. Die Erfolgswahrscheinlichkeit der oszillierenden Kanalaufbereitung betrug nach einem Jahr 88,3\%, nach zwei Jahren 85,4\%, nach drei Jahren 80,6\%, nach f{\"u}nf Jahren 64,9\% sowie nach acht Jahre 53,9\%. Die Methode der oszillierenden Kanalaufbereitung zeigte zu jeden Zeitpunkt der Untersuchung eine h{\"o}here Erfolgswahrscheinlichkeit als die Methode der rotierende Kanalaufbereitung.},
  subject      = {Wurzelspitzenresektion},
  language  = {de}
}
@phdthesis{Will2017,
  author    = {Will, Sebastian},
  title     = {Development of a presence model for driving simulators based on speed perception in a motorcycle riding simulator},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-149748},
  school      = {Universit{\"a}t W{\"u}rzburg},
  year      = {2017},
  abstract  = {Driving simulators are powerful research tools. Countless simulator studies have contributed to traffic safety over the last decades. Constant improvements in simulator technology call for a measureable scale to assess driving simulators with regard to their utility in human factors research. A promising psychological construct to do so is presence. It is commonly defined as the feeling of being located in a remote or virtual environment that seems to be real. Another aspect of presence describes the ability to act there successfully. The main aim of this thesis is to develop a presence model dedicated to the application in driving simulators. Established models have been combined and extended in order to gain a comprehensive model of presence that allows understanding its emergence and deriving recommendations on how to design or improve driving simulators. The five studies presented in this thesis investigate specific postulated model components and their interactions. All studies deal with motorcycling or a motorcycle riding simulator as exemplary field of application. The first study used a speed estimation task to investigate the contribution of different sensory cues to presence. While visualization plays a particularly important role, further improvements could be achieved by adding more consistent sensory stimuli to the virtual environment. Auditory, proprioceptive and vestibular cues have been subject to investigation. In the second study, the speed production method was applied. It confirmed the positive contribution of action to presence as predicted by psychocybernetic models. The third study dealt with the effect of training on presence. Hence, no positive effect was observed. The fourth study aimed at replicating previous findings on sensory fidelity and diversity in a more complex riding situation than only longitudinal vehicle control. The riders had to cross an unexpectedly appearing deep pit with the virtual motorcycle. The contribution of more consistent sensory stimulation on presence was successfully shown in this scenario, too. The final study was a real riding experiment that delivered reference values for the speed estimation capabilities of motorcycle riders. Besides higher variations in the simulator data, the general speed estimation performance was on a comparable level. Different measures, such as subjective ratings, behavioral responses, performance, and physiological reactions, have been applied as presence indicators. These studies' findings deliver evidence for the meaningful application of the proposed presence model in driving simulator settings. The results suggest that presence can be interpreted as a quality measure for perception in virtual environments. In line with psychocybernetic models, taking action, which is seen as controlling perception, enhances this quality even further. Describing the psychological construct of presence in a theoretical framework that takes the diversity of perception and action in driving simulator settings into account closes a gap in traffic psychological research.},
  subject      = {Fahrsimulator},
  language  = {en}
}