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@INPROCEEDINGS{Feldmann:911318,
      author       = {Feldmann, Sina and Adrian, Juliane},
      title        = {{I}ndividual movement strategies in response to an external
                      force},
      reportid     = {FZJ-2022-04610},
      year         = {2022},
      abstract     = {Density, velocity, or flow are key quantities to describe
                      dense crowds. However, they neglect the 3-dimensional
                      movements of a person. Although methods exist to describe
                      the motion of a single individual, it is difficult to
                      determine individual movements within a group and which
                      particular singular actions may pose risks to others.To
                      explore how people react when being pushed, experiments that
                      focus on individual movement strategies and interactions in
                      response to an external force were carried out. Participants
                      were lined up in a queue and the person at the end of the
                      row was pushed forward in a controlled manner. Variations
                      included the intensity of the push, the distance between the
                      participants, and the time between the positioning and the
                      push. During the experiments, 3D motion profiles using
                      motion capturing suits were obtained and the head
                      trajectories of the participants were recorded. In addition,
                      pressure sensors were used to quantify the intensity of the
                      pushes by measuring the normal force on the sensor surface.
                      As a first step, movement strategies for regaining balance
                      were identified by a qualitative analysis of the videos. We
                      could distinguish three behaviours: They are (i) walking
                      forward in an upright posture, (ii) pushing off with arms
                      after a pendulum movement, and (iii) leaning backwards. The
                      main difference is whether the push is passed on in the row
                      or participants attempt to absorb the push. In a next
                      analysis, the motion types will be quantified using the
                      3-dimensional movement data. Possible metrics for this
                      include the position of the hip relative to the upper trunk,
                      the displacement angle of the upper trunk, or the step
                      width. Furthermore, the influence of different factors such
                      as body size, position in the row and intensity of the push
                      on the strategies used will be investigated. It will also be
                      analysed how far the push is passed forward through the row
                      as well as the effects of the push to the side when people
                      are standing in a group.},
      month         = {Oct},
      date          = {2022-10-15},
      organization  = {Traffic and Granular Flow, online
                       (India), 15 Oct 2022 - 17 Oct 2022},
      subtyp        = {After Call},
      cin          = {IAS-7},
      cid          = {I:(DE-Juel1)IAS-7-20180321},
      pnm          = {5111 - Domain-Specific Simulation $\&$ Data Life Cycle Labs
                      (SDLs) and Research Groups (POF4-511) / CrowdDNA -
                      TECHNOLOGIES FOR COMPUTER-ASSISTED CROWD MANAGEMENT
                      (899739)},
      pid          = {G:(DE-HGF)POF4-5111 / G:(EU-Grant)899739},
      typ          = {PUB:(DE-HGF)24},
      url          = {https://juser.fz-juelich.de/record/911318},
}