@inproceedings{conf/eScience/GrimmGMPGHSZ07, title = {Trust Issues in Shibboleth-Enabled Federated Grid Authentication and Authorization Infrastructures Supporting Multiple Grid Middleware.}, author = {Christian Grimm and Ralf Groeper and Siegfried Makedanz and Hans Pfeiffenberger and Peter Gietz and Martin Haase and Michael Schiffers and Wolfgang Ziegler}, booktitle = {eScience}, crossref = {conf/eScience/2007}, pages = {569-576}, publisher = {IEEE Computer Society}, url = {http://dblp.uni-trier.de/db/conf/eScience/eScience2007.html#GrimmGMPGHSZ07}, year = {2007}, biburl = {http://www.bibsonomy.org/bibtex/2136c2ec8c5518c2964e5ef43639e06d6/dblp}, description = {dblp}, ee = {http://doi.ieeecomputersociety.org/10.1109/E-SCIENCE.2007.80}, date = {2008-07-14}, keywords = {dblp } } @inproceedings{conf/or/NickelVZ07, title = {Optimal Control Strategies for Incoming Inspection.}, author = {Stefan Nickel and Sebastian Velten and Hans-Peter Ziegler}, booktitle = {OR}, crossref = {conf/or/2007}, editor = {Jörg Kalcsics and Stefan Nickel}, pages = {43-48}, publisher = {Springer}, url = {http://dblp.uni-trier.de/db/conf/or/or2007.html#NickelVZ07}, year = {2007}, biburl = {http://www.bibsonomy.org/bibtex/22b61c7e666fb32691c3ab3af9c1076b0/dblp}, description = {dblp}, date = {2008-07-04}, ee = {http://dx.doi.org/10.1007/978-3-540-77903-2_7}, isbn = {978-3-540-77902-5}, keywords = {dblp } } @inproceedings{conf/mc/LehelMS03, title = {Weblogs als ein innovatives Instrument des betrieblichen Wissensmanagements.}, author = {Vanda Lehel and Florian Matthes and Klaus Steinfatt}, booktitle = {Mensch & Computer}, crossref = {conf/mc/2003}, editor = {Gerd Szwillus and Jürgen Ziegler}, publisher = {Teubner}, url = {http://dblp.uni-trier.de/db/conf/mc/mc2003.html#LehelMS03}, year = {2003}, biburl = {http://www.bibsonomy.org/bibtex/2d58cd723d519ce0bc41240fdee50dc6b/boehr}, description = {Weblogs as tool for enterprise knowledge management; support Communities of Practice}, ee = {http://mc.informatik.uni-hamburg.de/konferenzbaende/mc2003/konferenzband/muc2003-22-lehel.pdf}, date = {2005-01-20}, keywords = {CoP blog km } } @article{Ziegler:2005, title = {Propagation Models for Trust and Distrust in Social Networks}, address = {Hingham, MA, USA}, author = {Cai-Nicolas Ziegler and Georg Lausen}, journal = {Information Systems Frontiers}, number = {4-5}, pages = {337--358}, publisher = {Kluwer Academic Publishers}, url = {http://portal.acm.org/citation.cfm?id=1108451.1108466&coll=GUIDE&dl=GUIDE#}, volume = {7}, year = {2005}, biburl = {http://www.bibsonomy.org/bibtex/2dacd24132be507ae6aed87e778584f2a/gwpl}, description = {Propagation Models for Trust and Distrust in Social Networks}, issn = {1387-3326}, doi = {http://dx.doi.org/10.1007/s10796-005-4807-3}, keywords = {Social_Networks distrust trust trust_propagation } } @inproceedings{oltean:2003:ECAL, title = {Evolving Evolutionary Algorithms Using Multi Expression Programming}, address = {Dortmund, Germany}, author = {Mihai Oltean and Crina Grosan}, booktitle = {Advances in Artificial Life. 7th European Conference on Artificial Life}, editor = {Wolfgang Banzhaf and Thomas Christaller and Peter Dittrich and Jan T. Kim and Jens Ziegler}, month = {14-17 September}, number = {2801}, pages = {651--658}, publisher = {Springer}, series = {Lecture Notes in Artificial Intelligence}, url = {http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2801&spage=651}, year = {2003}, biburl = {http://www.bibsonomy.org/bibtex/2535c854776696bb78f2422baa42b1e47/brazovayeye}, abstract = {Finding the optimal parameter setting (i.e. the optimal population size, the optimal mutation probability, the optimal evolutionary model etc) for an Evolutionary Algorithm (EA) is a difficult task. Instead of evolving only the parameters of the algorithm we will evolve an entire EA capable of solving a particular problem. For this purpose the Multi Expression Programming (MEP) technique is used. Each MEP chromosome will encode multiple EAs. An nongenerational EA for function optimisation is evolved in this paper. Numerical experiments show the effectiveness of this approach.}, size = {8 pages}, email = {moltean@cs.ubbcluj.ro}, isbn = {3-540-20057-6}, notes = {ECAL-2003 Also available at www.eea.cs.ubbcluj.ro}, doi = {doi:10.1007/b12035}, keywords = {algorithms, genetic programming } } @inproceedings{ecal2003, title = {Evolving Developmental Programs for Adaptation, Morphogenesis, and Self-Repair}, address = {Dortmund, Germany}, author = {Julian F. Miller}, booktitle = {Advances in Artificial Life. 7th European Conference on Artificial Life}, editor = {Wolfgang Banzhaf and Thomas Christaller and Peter Dittrich and Jan T. Kim and Jens Ziegler}, month = {14-17 September}, pages = {256--265}, publisher = {Springer}, series = {Lecture Notes in Artificial Intelligence}, url = {http://www.elec.york.ac.uk/intsys/users/jfm7/ecal2003.pdf}, volume = {2801}, year = {2003}, biburl = {http://www.bibsonomy.org/bibtex/2f5dc2eae93389c658bc04d2b42d83b09/brazovayeye}, abstract = {A method for evolving a developmental program inside a cell to create multicellular organisms of arbitrary size and characteristics is described. The cell genotype is evolved so that the organism will organise itself into well defined patterns of differentiated cell types (e.g. the French Flag). In addition the cell genotypes are evolved to respond appropriately to environmental signals that cause metamorphosis of the whole organism. A number of experiments are described that show that the organisms exhibit emergent properties of self-repair and adaptation.}, isbn = {3-540-20057-6}, notes = {ECAL-2003 http://www.ecal2003.org/}, doi = {doi:10.1007/b12035}, keywords = {algorithms, genetic programming } } @phdthesis{oai:eldorado:0x00070350, title = {Evolution von Laufrobotersteuerungen mit Genetischer Programmierung}, address = {Germany}, annote = {Fachbereich 4; Universit{\"a}t Dortmund}, author = {Jens Ziegler}, month = {June~18}, school = {Dortmund University}, url = {https://eldorado.uni-dortmund.de/bitstream/2003/2743/1/Zieglerunt.pdf}, year = {2003}, biburl = {http://www.bibsonomy.org/bibtex/284c57fc0b39866526b75ae989e2e4648/brazovayeye}, abstract = {Die Evolution von Laufrobotersteuerungen mit Genetischer Programmierung wird anhandunterschiedlicher Roboterarchitekturen sowohl in der Simulation als auch mit realen Roboternuntersucht. Bedingt durch die lang andauernden Auswertungen von Laufprogrammen in Simulationund Realit{\"a}t werden die Methoden der Evolution - Evaluation, Selektion und Variation zus{\"a}tzlicheiner gr{\"u}ndlichen Analyse unterzogen, um den evolution{\"a}ren Prozess zur automatischen Generierungvon optimierten Laufrobotersteuerungen m{\"o}glichst zu beschleunigen.Im ersten Teil der Arbeit werden Grundlagen der Evolution von Laufroboterprogrammen erl{\"a}utert. InKapitel 1 wird die Thematik der autonomen mobilen Roboter eingehend betrachtet, wobei dasTeilgebiet der Laufroboter und die speziell hierf{\"u}r relevanten Problemstellungen dargestellt werden.Das zweite Kapitel besch{\"a}ftigt sich mit der Genetischen Programmierung, einem Spezialfall derEvolution{\"a}ren Algorithmen. Die f{\"u}r die Arbeit ben{\"o}tigten Begriffe des evolution{\"a}ren Rechnens werdenvereinbart, sowie die grundlegenden Mechanismen evolution{\"a}rer Algorithmen aufgezeigt. Hierbei wirddetailliert auf die besonderen Eigenschaften der Genetischen Programmierung eingegangen. Im drittenKapitel werden die mathematischen Grundlagen der Dynamiksimulation von Laufrobotern -Kinematik, Dynamik, Kollisionserkennung - dargestellt.Der zweite Teil der Arbeit f{\"u}hrt in die Thematik der Evolution von Laufrobotersteuerungen ein. InKapitel 4 werden detailliert die generelle Zielsetzung und die verwendeten Methoden bei der Evolutionvon Robotersteuerungen beschrieben. Es wird hierbei besonders die Repr{\"a}sentation vonKontrollstrukturen autonomer Roboter in Evolution{\"a}ren Algorithmen und die Umsetzung auf reale odersimulierte Roboter diskutiert. Anschlie{\ss}end wird die Methodik f{\"u}r die Evolution vonLaufroboterprogrammen mit Genetischer Programmierung eingef{\"u}hrt. Die Notwendigkeit derEvolution mit simulierten und realen Robotern, sowie die M{\"o}glichkeit, beide Alternativen gleichzeitigzu verwenden, wird diskutiert.In Teil III der Arbeit werden die Experimente zur Evolution von Laufprogrammen pr{\"a}sentiert. InKapitel 7 wird das Laufzeitverhalten der Evolution von Laufroboterprogrammen untersucht. Kapitel 8zeigt die erfolgreiche Evolution von Laufprogrammen f{\"u}r eine Vielfalt von Roboterformen in derSimulation auf. Die Angabe eines G{\"u}tekriteriums ist essenziell f{\"u}r die Evolution von Laufmustern undwird eingehend diskutiert. Dargestellt werden die Auswirkungen verschiedener Varianten derFitnessfunktion auf die resultierenden Bewegungsmuster der Roboter. Im Kapitel 9 werden f{\"u}r einensowohl real als auch als Computermodell existierenden humanoiden Roboter Laufprogrammeevolviert. Die Ergebnisse von Evolutionsl{\"a}ufen mit vierbeinigen Laufrobotern werden in Kapitel 10vorgestellt. Die Resultate der Experimente unter Einbeziehung der interaktiven Evolution und derModellierung der Fitnessfunktion zeigen eine deutliche Verbesserung gegen{\"u}ber demStandardalgorithmus.}, rights = {These documents can be used freely according to copyright laws. They can be printed freely. It is not allowed to distribute them further on.}, size = {182 pages}, contributor = {Prof. Dr. rer.-nat. Wolfgang Banzhaf and Fachbereich 4 and Prof. Dr. Heinrich M{\"u}ller}, oai = {oai:eldorado:0x00070350}, language = {GER}, notes = {sony aibo, hexapod}, keywords = {Autonome Computational Evolution, Laufroboter, Roboter, Simulation algorithms, genetic intelligence, programming, } } @inproceedings{ziegler03, title = {Decreasing the Number of Evaluations in Evolutionary Algorithms by using a Meta-Model of the Fitness Function}, address = {Essex}, author = {Jens Ziegler and Wolfgang Banzhaf}, booktitle = {Genetic Programming, Proceedings of EuroGP'2003}, editor = {Conor Ryan and Terence Soule and Maarten Keijzer and Edward Tsang and Riccardo Poli and Ernesto Costa}, month = {14-16 April}, pages = {264--275}, publisher = {Springer-Verlag}, series = {LNCS}, url = {http://www.springerlink.com/openurl.asp?genre=article&issn=0302-9743&volume=2610&spage=264}, volume = {2610}, year = {2003}, biburl = {http://www.bibsonomy.org/bibtex/21b918c7cc1e460d1fd7d8b470f99bb99/brazovayeye}, abstract = {In this paper a method is presented that decreases the necessary number of evaluations in Evolutionary Algorithms. A classifier with confidence information is evolved to replace time consuming evaluations during tournament selection. Experimental analysis of a mathematical example and the application of the method to the problem of evolving walking patterns for quadruped robots show the potential of the presented approach.}, organisation = {EvoNet}, publisher_address = {Berlin}, isbn = {3-540-00971-X}, notes = {EuroGP'2003 held in conjunction with EvoWorkshops 2003}, keywords = {algorithms, genetic programming } } @inproceedings{Ebner:2003:ECAL, title = {Evolution and Growth of Virtual Plants}, address = {Dortmund, Germany}, author = {Marc Ebner}, booktitle = {Advances in Artificial Life. 7th European Conference on Artificial Life}, editor = {Wolfgang Banzhaf and Thomas Christaller and Peter Dittrich and Jan T. Kim and Jens Ziegler}, month = {14-17 September}, pages = {228--237}, publisher = {Springer}, series = {Lecture Notes in Artificial Intelligence}, url = {http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2801&spage=228}, volume = {2801}, year = {2003}, biburl = {http://www.bibsonomy.org/bibtex/2af9ed234c22d82ebf86b73ff37b0eebf/brazovayeye}, abstract = {According to the Red Queen hypothesis, an evolving population may be improving some trait, even though its fitness remains constant. We have created such a scenario with a population of coevolving plants. Plants are modelled using Lindenmayer systems and rendered with OpenGL. The plants consist of branches and leaves. Their reproductive success depends on their ability to catch sunlight as well as their structural complexity. All plants are evaluated inside the same environment, which means that one plant is able to cover other plants leaves. Leaves which are placed in the shadow of other plants do not catch any sunlight. The shape of the plant also determines the area where offspring can be placed. Offspring can only be placed in the vicinity of a plant. A number of experiments were performed in different environments. The Red Queen effect was seen in all cases.}, isbn = {3-540-20057-6}, notes = {ECAL-2003}, doi = {DOI:10.1007/b12035}, keywords = {L-systems, algorithms, co-evolution genetic plants, programming, virtual } } @article{Dittrich:2001:AL, title = {Artificial Chemistries -- {A} Review}, author = {Peter Dittrich and Jens Ziegler and Wolfgang Banzhaf}, journal = {Artificial Life}, month = {Summer}, number = {3}, pages = {225--275}, volume = {7}, year = {2001}, biburl = {http://www.bibsonomy.org/bibtex/2a52a07b60a7dbb46323b31f1776f674b/brazovayeye}, abstract = {This article reviews the growing body of scientific work in artificial chemistry. First, common motivations and fundamental concepts are introduced. Second, current research activities are discussed along three application dimensions: modelling, information processing, and optimization. Finally, common phenomena among the different systems are summarized. It is argued here that artificial chemistries are {"}the right stuff{"} for the study of prebiotic and biochemical evolution, and the provide a productive framework for questions regarding the origin and evolution of organisations in general. Furthermore, artificial chemistries have a broad application range of practical problems, and shown in this review.}, doi = {doi:10.1162/106454601753238636}, keywords = {chemical complex computing emergence, evolution, life, molecular of origin self-organisation, simulation, systems, } }