Transcript Now and Here versus Then and There: Movement Ecology in the

Now & Here
versus
Then & There
Movement Ecology in the Present and Future CITEC Buildings
Jonathan Helbach, Dima Volchenkov,
Marko Tscherepanow, Sina Kühnel
THE ABILITY TO MOVE IS FUNDAMENTAL TO SUCCESS
in life.
Movement Ecology: When to Go, Where to Stop, What to Do
We know that in a long time perspective structural isolation would cause social
isolation
decades
years
THE ABILITY TO MOVE IS FUNDAMENTAL TO SUCCESS
in life.
Movement Ecology: When to Go, Where to Stop, What to Do
We know that in a long time perspective structural isolation would cause social
isolation
decades
years
What's going on in short-times (minutes), smallscales (tens of meters)?
We have studied 3D virtual models of the 2. floor of Q building and the
0.floor of the FBIIS.
We are here!
Virtual Reality
PRO:
• Movements are independent of
individual physical characteristics
of participants;
• Movements are under control:
sojourn times, stopping times,
path, velocity, turning times etc.
• Controllable environmental cues,
artificial aids, etc.
• We can study any building, even
that under construction;
CONTRA:
Virtual Reality
PRO:
• Movements are independent of
individual physical characteristics
of participants;
• Movements are under control:
sojourn times, stopping times,
path, velocity, turning times etc.
• Controllable environmental cues,
artificial aids, etc.
• We can study any building, even
that under construction;
CONTRA:
• VR provides a different way to
experience environment:
- degradation of sensory cues,
poor resolution, device latencies,
- absence of physical, dynamical
motion cues
Sense of spatial presence ≠
spatial presence!
• Mobility in VR depends on the
level of expertise in computer
games (first-person perspective,
shooters)
Those who had firstperson computer games
experience
started the experiment
with exploration of the
whole environment!
Experiments:
• No time limit
• Number of doors was limited! (Q2:10 and FBIIS:15)
• Money for found objects
Video 2
Structural &Vantage graphs of Q
Now we are here!
Probability of turns
Colors indicate (mean) first passage times on the
structural graph.
Structural &Vantage graphs of FBIIS
Probability of turns
Colors indicate (mean) first passage times on the
structural graph.
Movement routine: it is necessary to apply the both
controllers (direct movement and turns) to move in
virtual environment
dx  dt
Fluctuations of
displacement
Fluctuations of
rotation time
RMSF = Root Mean Square Fluctuation taken with respect to ALL participants and ALL
points whenever they applied the turning controllers.
t
y t    x t , y t   y t0  t   y t0 , RMSF (t ) 
t 1
y t 
2
 y t 
2
Gender difference in movement routines
53%
67%
Different level of expertise in shooters???
1o. consequence:
gender mobility
difference
Mean path gains in FBIIS
(vs. Q2):
75% (men)!
135% (women)!!!
1o. consequence:
gender mobility
difference
Mean velocity gains in
FBIIS (vs. Q2):
9.5% (men)!
54.5% (women)!!!
2o. consequence: dynamical formation of proximity
• Most of door openings
happens NOW & HERE !
• There are “long runs” ,
“flights” to THEN & THERE
Movement Ecology
Intermittent search
Plant’s
seeds
Reindeer
Lévy flights
P(d)
P(d) d-m, m 2
Fruit Fly
Wandering albatross
Jackals
Dinoflagellates
Spider monkey
Rolling Dices
ln P(T)
ln P(T)
T – the length of winning sequences
ln T
ln T
Interaction with environment via a constant "dialogue"
“Should I stay or should I go now?
Should I stay or should I go now?
If I go there will be trouble
An’ if I stay it will be double
So come on and let me know!”
(The Clash)
Let p  0,1 is an estimated chance to get a reward " here" ; 
Let q  0,1 is an estimated chance to get a reward " there" ;

1
1

If p  q, we stay " here" and open the next door;
 P (t ) 
(t  1)( t  2) t ²

If p  q, we go " there" , for a better chance elsewhere;


If p,q are distribute d uniformly random over 0,1;
Conclusion
1. The structure of FBIIS is instructive; exploration is needed only in side corridors.
2. In average, the range of smooth, unobstructed movements in FBIIS scores up to 10
meters (vs. 6 meters in Q) promoting mobility in subjects:
FBIIS vs Q
Velocity gain in FB
Path gain in FB
Men
9.5%
75%
Women
54.5%
135%
3. We report the first experimental observation of a long algebraic tail dominating the
movement statistics in humans! (and suggest a model for that)