TY  - JOUR
A1  - Ferrein, Alexander
A1  - Jacobs, Stefan
A1  - Schiffer, Stefan
A1  - Beck, Daniel
T1  - Robust Collision Avoidance in Unknown Domestic Environments  /  Jacobs, Stefan ; Ferrein, Alexander ; Schiffer, Stefan ; Beck, Daniel ; Lakemeyer, Gerhard
JF  - ROBOCUP 2009: ROBOT SOCCER WORLD CUP XIII
Y1  - 2009
N1  - Lecture Notes in Computer Science ; 5949
SP  - 116
EP  - 127
PB  - Springer
CY  - Berlin
ER  - 
TY  - BOOK
A1  - Ferrein, Alexander
A1  - Pauli, J.
A1  - Siebel, N. T.
A1  - Steinbauer, Gerald
T1  - Hybrid control for autonomous systems : [... 1st Workshop on Hybrid Control of Autonomous Systems - Integrating Learning, Deliberation and Reactive Control with the 21st International Joint Conference on Artificial Intelligence (IJCAI-09), held in Pasadena, CA, in July 2009] / ed. by Alexander Ferrein ...
Y1  - 2009
ER  - 
TY  - CHAP
A1  - Ferrein, Alexander
A1  - Potgieter, Anet
A1  - Steinbauer, Gerald
T1  - Self-aware robots - What do we need from learning, deliberation, and reactive control?
T2  - HYCAS 2009 : International Workshop on Hybrid Control of Autonomous Systems : Integrating Learning, Deliberation and Reactive Control : Pasadena, Calif., 13 July 2009
Y1  - 2009
SP  - 1
EP  - 5
PB  - AAAI Pr.
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Rens, Gavin
A1  - Poel, Etienne van der
T1  - A BDI agent architecture for a POMDP planner / Rens, Gavin ; Ferrein, Alexander ; Poel, Etienne van der
Y1  - 2009
N1  - 9th International Symposium on Logical Formalization of Commonsense Reasoning: Commonsense 2009, Toronto, Canada, 1-3 June, 2009
SP  - 1
EP  - 6
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Schiffer, Stefan
A1  - Lakemeyer, Gerhard
T1  - Embedding fuzzy controllers in golog  / Ferrein, Alexander ; Schiffer, Stefan ; Lakemeyer, Gerhard
JF  - IEEE International Conference on Fuzzy Systems, 2009. FUZZ-IEEE 2009
Y1  - 2009
SN  - 978-1-4244-3596-8
SP  - 894
EP  - 899
PB  - IEEE
CY  - New York
ER  - 
TY  - JOUR
A1  - Ferrein, Alexander
A1  - Steinbauer, Gerald
A1  - McPhillips, Graeme
A1  - Niemüller, Tim
A1  - Potgieter, Anet
T1  - Team Zadeat 2009 : team report
Y1  - 2009
VL  - 6
SP  - 1
ER  - 
TY  - JOUR
A1  - Fischer, Jan-Thomas
A1  - Kowalski, Julia
A1  - Pudasaini, Shiva P.
A1  - Miller, S. A.
T1  - Dynamic Avalanche Modeling in Natural Terrain
JF  - International Snow Science Workshop, Davos 2009, Proceedings ; Proc. ISSW 2009
N2  - The powerful avalanche simulation toolbox RAMMS (Rapid Mass Movements) is based on a depth-averaged
hydrodynamic system of equations with a Voellmy-Salm friction relation. The two empirical friction parameters
μ and �  correspond to a dry Coulomb friction and a viscous resistance, respectively. Although μ and � lack a
proper physical explanation, 60 years of acquired avalanche data in the Swiss Alps made a systematic calibration
possible. RAMMS can therefore successfully model avalanche flow depth, velocities, impact pressure and run
out distances. Pudasaini and Hutter (2003) have proposed extended, rigorously derived model equations that
account for local curvature and twist. A coordinate transformation into a reference system, applied to the actual
mountain topography of the natural avalanche path, is performed. The local curvature and the twist of the
avalanche path induce an additional term in the overburden pressure. This leads to a modification of the Coulomb
friction, the free-surface pressure gradient, the pressure induced by the channel, and the gravity components
along and normal to the curved and twisted reference surface. This eventually guides the flow dynamics and
deposits of avalanches. In the present study, we investigate the influence of curvature on avalanche flow in
real mountain terrain. Simulations of real avalanche paths are performed and compared for the different models
approaches. An algorithm to calculate curvature in real terrain is introduced in RAMMS. This leads to a curvature
dependent friction relation in an extended version of the Voellmy-Salm model equations. Our analysis provides
yet another step in interpreting the physical meaning and significance of the friction parameters used in the
RAMMS computational environment.
KW  - snow
KW  - avalanche
Y1  - 2009
SP  - 448
EP  - 452
ER  - 
TY  - THES
A1  - Fissabre, Anke
T1  - Dachterrassen der Renaissance
Y1  - 2009
N1  - Aachen, Techn. Hochsch., Diss., 2009 
Bd. [1] Textband ; Bd. [2] Abbildungsband
ER  - 
TY  - CHAP
A1  - Fissabre, Anke
A1  - Niethammer, Bernd
T1  - The Invention of Glazed Curtain Wall in 1903 – The Steiff Toy Factory
T2  - Proceedings of the Third International Congress of Construction History, TU Cottbus 20.-24. Mai 2009, Vol 2
Y1  - 2009
SN  - 978-3-936033-31-1
SP  - 595
EP  - 602
PB  - Neunplus1
CY  - Berlin
ER  - 
TY  - THES
A1  - Fleischhaker, Robert
T1  - Light propagation in dense and chiral media
Y1  - 2009
N1  - Heidelberg, Univ., Diss., 2009
ER  -