By Edwin R. Galea, Lynn Hulse, Rachel Day, Asim Siddiqui, Gary Sharp, Karen Boyce (auth.), Wolfram W. F. Klingsch, Christian Rogsch, Andreas Schadschneider, Michael Schreckenberg (eds.)
The foreign convention on "Pedestrian and Evacuation Dynamics", hung on February 27-29, 2008 at Wuppertal college in Germany, used to be the fourth during this sequence after profitable conferences in Duisburg (2001), Greenwich (2003) and Vienna (2005). The convention was once geared toward enhancing the medical trade among scientists, specialists and practitioners of varied fields of pedestrian and evacuation dynamics and featured: the research of evacuation procedures and pedestrian movement, modeling of pedestrian dynamics in a number of occasions, experiments on pedestrian dynamics, human habit learn, regulatory action.
All those issues are integrated during this booklet to provide a huge and state of the art evaluate of pedestrian and evacuation dynamics.
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Extra info for Pedestrian and Evacuation Dynamics 2008
Siddiqui, L. Summerﬁeld, M. Marselle, and P. Greenall, Methodologies Employed in the Collection, Retrieval and Storage of Human Factors Information Derived from First Hand Accounts of Survivors of the WTC Disaster of 11 September 2001, Journal of Applied Fire Science, Vol. 15, 2006–2007, pp. 253–276. 6. J. , New York, 1971. 7. J. Pauls, Performance of Means of Egress Conducting the Research Needed to Establish Realistic Expectations, to appear in Proceedings of SFPE 7th Int. Conf. on Performance Based Codes and Fire Safety Design Methods, April 16– 18, 2008, Auckland, New Zealand.
4), and following people over successive frames (Sect. 3). 1 Calibration Before extracting metric information the video has to be undistorted. Especially the wide angle lenses generate large distortions at the boundary of the video (Fig. 2a). To describe the mapping of a homogeneous real world coordinate x ∈ R4 to a homogeneous pixel coordinate u ∈ R3 in the recorded image an ideal model of a pinhole camera with distortion introduced by Brown  is adopted. The model uses a camera with the focal length (fx fy ) and the distortion centre (cx cy ) as intrinsic parameters and the orientation R ∈ R3×3 , the position t ∈ R3 , the parameters k1 , k2 of the radial and p1 , p2 of the tangential distortion up to fourth order as extrinsic parameters.
Evacuate the building. The analysis of the video recordings provided exact times with which to compare these estimates, which turned out to be pretty accurate. Stairwell Evacuation Once occupants decided to evacuate their ﬂoor, they moved toward the different stairwells. The questionnaire had several questions for respondents to express their experience descending the studied stairwells. The questionnaire asked the respondents if they encountered any problems as they entered and negotiated the stairwells.