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FF: The Fast-Forward Planning System

Jörg Hoffmann
2001 The AI Magazine  
I FAST-FORWARD (FF) was the most successful automatic planner in the Fifth International Conference on Artificial Intelligence Planning and Scheduling (AIPS'00) planning systems competition.  ...  F AST-FORWARD, abbreviated FF, was the most successful automatic planner in the Fifth International Conference on Artificial Intelligence Planning and Scheduling (AIPS'00) planning systems competition.  ...  Thanks also go to Blai Bonet and Hector Geffner for their help in comparing FF with HSP.  ... 
doi:10.1609/aimag.v22i3.1572 dblp:journals/aim/Hoffmann01 fatcat:gym6iuzdhzg7blz43xoqpvjcee

Macro-FF: Improving AI Planning with Automatically Learned Macro-Operators

A. Botea, M. Enzenberger, M. Mueller, J. Schaeffer
2005 The Journal of Artificial Intelligence Research  
Our system, Macro-FF, extends Hoffmann's state-of-the-art planner FF 2.3 with support for two kinds of macro-operators, and with engineering enhancements.  ...  We have successfully used such an approach in the fourth international planning competition IPC-4.  ...  We thank Jörg Hoffmann for making the source code of FF available, and for kindly answering many technical questions related to FF.  ... 
doi:10.1613/jair.1696 fatcat:cjqaezl67vajnicunmyianyjp4

The Metric-FF Planning System: Translating ``Ignoring Delete Lists'' to Numeric State Variables

J. Hoffmann
2003 The Journal of Artificial Intelligence Research  
Based on that, we extend the algorithms used in the heuristic planning system FF to linear tasks.  ...  The resulting system Metric-FF is, according to the IPC-3 results which we discuss, one of the two currently most efficient numeric planners.  ...  Metric-FF was developed and implemented while the author was visiting the Durham Planning Group, Durham, UK. Thanks go to Maria Fox and Derek Long for discussions, and for making the stay enjoyable.  ... 
doi:10.1613/jair.1144 fatcat:sdym3ywibbgpvlqasvhanvpete

SU-FF-I-79: Java-Based Plugin for Tomographic Reconstruction for SPECT Data

M Andrade, M Costa, A Marques da Silva
2006 Medical Physics (Lancaster)  
True alignment of planning and on-board image data was achieved according to a 3D point-based registration of the 6 reference BBs in the CT and CBCT images.  ...  Single-axis rotations up to +/-10 o and 3-axis translations up to +/-10 mm were simulated in the planning CT, prior to the generation of reference DTS images.  ...  SU-FF-T-08 SU-FF-T-09 SU-FF-T-10 A Complexity Metric for Quantitative Triage of IMRT QA J Kruse*, Mayo Clinic, Rochester, MN Purpose: Our IMRT planning system can develop highly conformal plans with  ... 
doi:10.1118/1.2240759 fatcat:5we2nvgwx5hrxcv2ngufce6obq

FF-MAC : Fast Forward IEEE 802.15.4 MAC Protocol for Real-Time Data Transmission

Khalid El, Najib ELKAMOUN, Kun Mean
2013 International Journal of Advanced Computer Science and Applications  
This paper presents a Fast Forward MAC layer designed for hard real-time applications in wireless sensor networks.  ...  Our approach resolves the energy delay trade-off by avoiding the storage of the real-time data in the coordinator during sleep time.  ...  research (CNRST Morocco) and the EU (FEDER).  ... 
doi:10.14569/ijacsa.2013.040104 fatcat:wkexz2empzhwfhxrdxn7nzp4de

The FF Planning System: Fast Plan Generation Through Heuristic Search

J. Hoffmann, B. Nebel
2001 The Journal of Artificial Intelligence Research  
We describe and evaluate the algorithmic techniques that are used in the FF planning system.  ...  Like the HSP system, FF relies on forward state space search, using a heuristic that estimates goal distances by ignoring delete lists.  ...  HSP2 System-R R e S y 1 % 0 # k i y G I X ' 0 R 5 q # F V & y 1 % 0 !  ... 
doi:10.1613/jair.855 fatcat:6et3esrytzbg3narj67dv5vn7m

Semi-analytical calculation of QED radiative corrections to e^+e^-→f̅f with special emphasis on kinematical cuts to the final state [article]

M.A. Jack
2000 arXiv   pre-print
In this dissertation, a complete calculation of QED radiative corrections is presented for total cross sections and forward- backward asymmetries for s-channel fermion pair production in e+e- annihilation  ...  This includes cuts on the maximal acollinearity angle theta_acol and on the minimal energies E_min of the final state fermion pair and on the cosine of the scattering angle of one fermion, costheta.  ...  The variable shown in Fig. 2 .4 besides R is x, the normalized invariant mass of the (f + γ) rest system.  ... 
arXiv:hep-ph/0009068v1 fatcat:bdmftqqwkbgabmv7qqwy7fdrya

Physiology of Soccer

Tomas St??len, Karim Chamari, Carlo Castagna, Ulrik Wisl??ff
2005 Sports Medicine  
Acknowledgements under-23 elite soccer players showed that the per-The authors gratefully acknowledge Jan Erik Ingebrigsten formance in this test was significantly correlated to at the Department of Sociology  ...  The authors have no conflicts of interest a distance representative of soccer play, especially that are directly relevant to the content of this review. for the 10m lap-time distance.  ...  freas fast as possible.  ... 
doi:10.2165/00007256-200535060-00004 pmid:15974635 fatcat:xekafb6p3vhfjc6hfo3fi5coba

Thasos. Part II.—Topography

John ff. Baker-Penoyre
1909 Journal of Hellenic Studies  
But since he wrote before the Austrian staff-map, which contains rough contours, was produced, it will be well to supplement and correct his remarks on the mountain system of the island.On this M.  ...  Perrot wrote (p. 7):—'Le système des montagnes de l'île est assez confus, et très difficile à établir sur une carte.  ...  It is considered better to have two cisterns, so that one may be used during the annual changing of the sand, and in effect two are found on the Acropolis of Thasos, 35 and 36 in the plan. 214 J. ff  ... 
doi:10.2307/624684 fatcat:a47s6aej6bakjilg52u2o5efbq

Agile techniques to avoid firefighting at a start-up

Joseph A. Blotner
2002 OOPSLA 2002 Practitioners Reports on - OOPSLA '02  
This discipline enabled the company to actually deliver a "Release", and move forward into a new product architecture.  ...  This paper discusses the agile software development discipline that enabled Sabrix to evolve from that chaotic environment to the point where the company was balancing both urgency and importance to drive  ...  In the spirit of a start-up company, communication moved very fast, and knowledge was shared verbally.  ... 
doi:10.1145/604251.604253 dblp:conf/oopsla/Blotner02 fatcat:lfvqpcpnrrbkdjvu6uniyoafzu

Designing a web services project for maximum value

Katherine Radeka
2002 OOPSLA 2002 Practitioners Reports on - OOPSLA '02  
The 90 Day Challenge team set out to deliver an end-to-end Web services solution to enterprise sales agents in 90 days, with immediate plans to extend the solution to other user groups.  ...  In order to meet their commitments, the team had to reuse the same component Web services in multiple contexts.  ...  This gave us an immediate two-week jump in our schedule for the Web services that used data from those systems.  ... 
doi:10.1145/604251.604259 dblp:conf/oopsla/Radeka02 fatcat:rc7kf6eyszeynfbp5eikrq4gue

Towards learning domain-independent planning heuristics [article]

Pawel Gomoluch, Dalal Alrajeh, Alessandra Russo, Antonio Bucchiarone
2017 arXiv   pre-print
This is a part of a wider research program whose objective is to improve practical applicability of planning in systems for which the planning domains evolve at run time.  ...  One of the key factors restricting the applicability of planning is its computational complexity resulting from exponentially large search spaces.  ...  The learning process leverages features computed based on graphs constructed by the Fast Forward (FF) heuristic [Hoffmann and Nebel, 2001] .  ... 
arXiv:1707.06895v1 fatcat:s2ftzqzxungenhpdu2hnecpg3m


Quentin Roy, Simon T. Perrault, Shengdong Zhao, Richard C. Davis, Anuroop Pattena Vaniyar, Velko Vechev, Youngki Lee, Archan Misra
2017 Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems - CHI '17  
All findings and recommendations are those of the authors and do not necessarily reflect the views of the granting agencies or the universities.  ...  ACKNOWLEDGEMENTS This work was partially supported by the Singapore Ministry of Education Academic Research Fund Tier 2 under research grant MOE2014-T2-1063 and National University of Singapore Academic  ...  As such, we believe that fast-forwarding-based techniques such as Image Checkpoints + Fast Forwarding (IC+FF) or Video Checkpoints + Fast Forwarding (VC+FF) strike a better balance.  ... 
doi:10.1145/3025453.3025976 dblp:conf/chi/RoyPZDVVLM17 fatcat:pf552e7jbbdpnd6276e24uyahi

Breaking Through Fast-Forwarding: Brand Information and Visual Attention

S. Adam Brasel, James Gips
2008 Journal of Marketing  
This research explores how fast-forwarding through commercials alters the visual attention of viewers and how marketers can tailor advertisements to retain effectiveness as digital video recorder usage  ...  Building on prior work in visual marketing and perceptual psychology, the authors conduct two eye-tracker studies that show how fast-forwarding viewers pay more attention during commercials, but their  ...  We used planned contrasts to explore the strong effect of the fast-forwarding manipulation on mean recognition (see Table 1 ).  ... 
doi:10.1509/jmkg.72.6.31 fatcat:n3hdkseepfbejndr3k2lu2e2ei

A Heuristic for Domain Independent Planning and Its Use in an Enforced Hill-Climbing Algorithm [chapter]

Jörg Hoffmann
2000 Lecture Notes in Computer Science  
We present a new heuristic method to evaluate planning states, which is based on solving a relaxation of the planning problem.  ...  The algorithm is complete on what we call deadlock-free domains. Though it does not guarantee the solution plans to be optimal, it does find close to optimal plans in most cases.  ...  ACKNOWLEDGEMENTS The author thanks Bernhard Nebel for helpful discussions and suggestions on designing the paper. Thanks also go the the referees for their comments which helped improve the paper.  ... 
doi:10.1007/3-540-39963-1_23 fatcat:bqrqfej5rzaslgf57b2wflg6wu
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