Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Social Force Model for Pedestrian Dynamics   It is suggested that the motion of pedestrians can be described as if they
would be subject to `social forces'. These `forces' are not directly exerted by
the pedestrians' personal environment, but they are a measure for the internal
motivations of the individuals to perform certain actions (movements). The
corresponding force concept is discussed in more detail and can be also applied
to the description of other behaviors.
  In the presented model of pedestrian behavior several force terms are
essential: First, a term describing the acceleration towards the desired
velocity of motion. Second, terms reflecting that a pedestrian keeps a certain
distance to other pedestrians and borders. Third, a term modeling attractive
effects. The resulting equations of motion are nonlinearly coupled Langevin
equations. Computer simulations of crowds of interacting pedestrians show that
the social force model is capable of describing the self-organization of
several observed collective effects of pedestrian behavior very realistically.

23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat