| [1] | Supper, Jochen and Fröhlich, Holger and Spieth, Christian and Dräger,
Andreas and Zell, Andreas. Inferring Gene Regulatory Networks by Machine Learning Methods. In Proceedings of the 5\textsuperscript{th} Asia-Pacific Bioinformatics
Conference (APBC 2007), pages 247--256,, 57 Shelton Street, Govent Garden, London WC2H 9HE, UK,jan, 2007. [pdf , url]Bibtex@INPROCEEDINGS{Supper2007,author = {Supper, Jochen and Fröhlich, Holger and Spieth, Christian and Dräger, Andreas and Zell, Andreas}, title = {Inferring Gene Regulatory Networks by Machine Learning Methods}, booktitle = {Proceedings of the 5\textsuperscript{th} Asia-Pacific Bioinformatics Conference (APBC 2007)}, year = {2007}, editor = {Sankoff, David and Wang, Lusheng and Chin, Francis}, volume = {5}, series = {Series on Advances in Bioinformatics and Computational Biology}, pages = {247--256}, address = {57 Shelton Street, Govent Garden, London WC2H 9HE, UK}, month = {jan}, publisher = {Imperial College Press}, abstract = {The ability to measure the transcriptional response after a stimulus has drawn much attention to the underlying gene regulatory networks. Several machine learning related methods, such as Bayesian networks and decision trees, have been proposed to deal with this difficult problem, but rarely a systematic comparison between different algorithms has been performed. In this work, we critically evaluate the application of multiple linear regression, SVMs, decision trees and Bayesian networks to reconstruct the budding yeast cell cycle network. The performance of these methods is assessed by comparing the topology of the reconstructed models to a validation network. This validation network is defined \emph{a priori} and each interaction is specified by at least one publication. We also investigate the quality of the network reconstruction if a varying amount of gene regulatory dependencies is provided \emph{a priori}.}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/mitarb/draeger/publications/Supper2007.html}, doi = {10.1142/9781860947995_0027}, pdf = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/SupperAPBC2007_GRNs.pdf}, project = {abt_zell, bioinformatics}, url = {http://dx.doi.org/10.1142/9781860947995_0027}, } |
| [2] | Supper, Jochen and Fröhlich, Holger and Zell, Andreas. Gene Regulatory Network Inference via Regression Based Topological
Refinement. In Asia-Pacific Bioinformatics Conference (APBC 2007), pages 267-276,, Hong Kong, China,jan, 2007. [url]Bibtex@INPROCEEDINGS{2007_40,author = {Supper, Jochen and Fröhlich, Holger and Zell, Andreas}, title = {Gene Regulatory Network Inference via Regression Based Topological Refinement}, booktitle = {Asia-Pacific Bioinformatics Conference (APBC 2007)}, year = {2007}, editor = {David Sankoff and Lusheng Wang and Francis Chin}, volume = {5}, series = {Advances in Bioinformatics and Computational Biology}, pages = {267-276}, address = {Hong Kong, China}, month = {jan}, publisher = {Imperial College Press}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_40}, isbn = {978-1-86094-783-4}, project = {abt_zell, bioinformatics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/SupperAPBC2007_TopologicalRefinement.pdf}, } |
| [3] | Komma, Philippe and Fischer, Jan and Duffner, Frank and Bartz, Dirk. Lossless Volume Data Compression Schemes. In Simulation and Visualization 2007 (SimVis 2007), pages 169-182,, Magdeburg, Germany,mar, 2007. [url]Bibtex@INPROCEEDINGS{komma07,author = {Komma, Philippe and Fischer, Jan and Duffner, Frank and Bartz, Dirk}, title = {Lossless Volume Data Compression Schemes}, booktitle = {Simulation and Visualization 2007 (SimVis 2007)}, year = {2007}, pages = {169-182}, address = {Magdeburg, Germany}, month = {mar}, project = {extern}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/komma2007simvis-lossless.pdf}, } |
| [4] | Weiss, Christian and Masselli, Andreas and Tamimi, Hashem and Zell,
Andreas. Fast Outdoor Robot Localization Using Integral Invariants. In 5th International Conference on Computer Vision Systems (ICVS 2007), pages 21-24,, Bielefeld, Germany,mar, 2007. [url]Bibtex@INPROCEEDINGS{2007_91,author = {Weiss, Christian and Masselli, Andreas and Tamimi, Hashem and Zell, Andreas}, title = {Fast Outdoor Robot Localization Using Integral Invariants}, booktitle = {5th International Conference on Computer Vision Systems (ICVS 2007)}, year = {2007}, pages = {21-24}, address = {Bielefeld, Germany}, month = {mar}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_91}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/weiss07icvs.pdf}, } |
| [5] | Majid Beigi and Andreas Zell. A novel kernel-based method for local pattern extraction in random
process signals. In Proc. 15th European Symposium on Artificial Neural Networks (ESANN
2007), pages 265-270,, Bruges, Belgium,apr, 2007. [url]Bibtex@INPROCEEDINGS{beigi2007novel,author = {Majid Beigi and Andreas Zell}, title = {A novel kernel-based method for local pattern extraction in random process signals}, booktitle = {Proc. 15th European Symposium on Artificial Neural Networks (ESANN 2007)}, year = {2007}, pages = {265-270}, address = {Bruges, Belgium}, month = {apr}, ee = {http://www.dice.ucl.ac.be/Proceedings/esann/esannpdf/es2007-32.pdf}, project = {abt_zell}, timestamp = {2010.03.09}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/BeigiESANN2007.pdf}, } |
| [6] | Marius Hofmeister. {BMF} im {P}raxiseinsatz. {E}ntwicklung einer {I}ntegrationsschnittstelle
für {C}ontent-{M}anagement-{S}yteme. , pages 230-237,may, 2007. [url]Bibtex@ARTICLE{Hofmeister2007,author = {Marius Hofmeister}, title = {{BMF} im {P}raxiseinsatz. {E}ntwicklung einer {I}ntegrationsschnittstelle für {C}ontent-{M}anagement-{S}yteme}, journal = {Fachzeitschrift für Fernsehen, Film und elektronische Medien (FKT)}, year = {2007}, pages = {230-237}, number = {5}, month = {may}, project = {extern}, url = {http://www.cogsys.cs.uni-tuebingen.de/mitarb/hofmeister/publications/hofmeister_fktg.pdf}, } |
| [7] | Tscherneck, Stephanie. {Identifizierung und Charakterisierung der Prophagen Repressor Bindungsstellen
auf den Genomen PY54 und phiKO2}. , Bahnhofstr. 1, 15745 Wildau (Germany),aug, 2007. Bibtex@Bachelorthesis{Tscherneck2007a,author = {Tscherneck, Stephanie}, title = {{Identifizierung und Charakterisierung der Prophagen Repressor Bindungsstellen auf den Genomen PY54 und phiKO2}}, school = {University of Applied Sciences Wildau (UASW)}, year = {2007}, address = {Bahnhofstr. 1, 15745 Wildau (Germany)}, month = {aug}, abstract = {following soon}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?Tscherneck2007a}, project = {extern, molecluar_biology}, } |
| [8] | Dräger, Andreas and Kronfeld, Marcel and Supper, Jochen and Planatscher,
Hannes and Magnus, J{\o}rgen B. and Oldiges, Marco and Zell, Andreas. {Benchmarking Evolutionary Algorithms on Convenience Kinetics Models
of the Valine and Leucine Biosynthesis in \emph{C.~glutamicum}}. In IEEE Congress on Evolutionary Computation (CEC 2007), pages 896--903,, Singapore,sep, 2007. [pdf , url]Bibtex@INPROCEEDINGS{Draeger2007b,author = {Dräger, Andreas and Kronfeld, Marcel and Supper, Jochen and Planatscher, Hannes and Magnus, J{\o}rgen B. and Oldiges, Marco and Zell, Andreas}, title = {{Benchmarking Evolutionary Algorithms on Convenience Kinetics Models of the Valine and Leucine Biosynthesis in \emph{C.~glutamicum}}}, booktitle = {IEEE Congress on Evolutionary Computation (CEC 2007)}, year = {2007}, editor = {Srinivasan, Dipti and Wang, Lipo}, pages = {896--903}, address = {Singapore}, month = {sep}, organization = {IEEE Computational Intelligence Society}, publisher = {IEEE Press}, abstract = {An important problem in systems biology is parameter estimation for biochemical system models. Our work concentrates on the metabolic subnetwork of the valine and leucine biosynthesis in \emph{Corynebacterium glutamicum}, an anaerobic actinobacterium of high biotechnological importance. Using data of an in vivo experiment measuring 13 metabolites during a glucose stimulus-response experiment we investigate the performance of various Evolutionary Algorithms on the parameter inference problem in biochemical modeling. Due to the inconclusive information on the reversibility of the reactions in the pathway, we develop both a reversible and an irreversible differential equation model based on the recent convenience kinetics approach. As the reversible model allows better approximation on the whole, we use it to analyze the impact of different settings on four especially promising EAs. We show that Particle Swarm Optimization as well as Differential Evolution are useful methods for parameter estimation on convenience kinetics models outperforming Genetic Algorithm and Evolution Strategy approaches and nearly reaching the quality of independent spline approximations on the raw data.}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/mitarb/draeger/publications/Draeger2007b.html}, doi = {10.1109/CEC.2007.4424565}, isbn = {1-4244-1340-0}, keywords = {systems biology, mathematical modeling, benchmark, evolutionary algorithms, valine and leucine biosynthesis, Corynebacterium glutamicum, convenience kinetics}, notes = {CEC 2007 - A joint meeting of the IEEE, the EPS, and the IET. IEEE Catalog Number: 07TH8963C}, pdf = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/Draeger2007b.pdf}, project = {abt_zell, bioinformatics, eva2}, url = {http://dx.doi.org/10.1109/CEC.2007.4424565}, } |
| [9] | Dräger, Andreas and Supper, Jochen and Planatscher, Hannes and
Magnus, J{\o}rgen B. and Oldiges, Marco and Zell, Andreas. {Comparing Various Evolutionary Algorithms on the Parameter Optimization
of the Valine and Leucine Biosynthesis in \emph{Corynebacterium glutamicum}}. In IEEE Congress on Evolutionary Computation (CEC 2007), pages 620--627,, Singapore,sep, 2007. [pdf , url]Bibtex@INPROCEEDINGS{Draeger2007a,author = {Dräger, Andreas and Supper, Jochen and Planatscher, Hannes and Magnus, J{\o}rgen B. and Oldiges, Marco and Zell, Andreas}, title = {{Comparing Various Evolutionary Algorithms on the Parameter Optimization of the Valine and Leucine Biosynthesis in \emph{Corynebacterium glutamicum}}}, booktitle = {IEEE Congress on Evolutionary Computation (CEC 2007)}, year = {2007}, editor = {Srinivasan, Dipti and Wang, Lipo}, pages = {620--627}, address = {Singapore}, month = {sep}, organization = {IEEE Computational Intelligence Society}, publisher = {IEEE Press}, abstract = {Parameter estimation for biochemical model systems has become an important problem in systems biology. Here we focus on the metabolic subnetwork of the valine and leucine biosynthesis in \emph{C.~glutamicum}. Due to the lack of indisputable information regarding reversibility of the reactions in the pathway we derived two alternative ordinary differential equation models based on the formalisms of the generalized mass-action rate law. We introduced two alternative modeling approaches for feedback inhibition and evaluated the applicability of six optimization procedures (multi start Hill Climber, binary and real valued Genetic Algorithm, standard and covariance matrix adaption Evolution Strategy as well as Simulated Annealing) to the problem of parameter fitting. The model considering irreversible reactions performed worse and was therefore rejected from further analysis. We benchmarked the impact of different mutation and crossover operators as well as the influence of the population size on the remaining system and the two best optimization procedures namely binary Genetic Algorithm and the Evolution Strategy. The GA performed best on average and found the best total result based on the relative squared error.}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/mitarb/draeger/publications/Draeger2007a.html}, doi = {10.1109/CEC.2007.4424528}, isbn = {1-4244-1340-0}, keywords = {systems biology, mathematical modeling, benchmark, Evolutionary Algorithms, valine and leucine biosynthesis, Corynebacterium glutamicum, generalized mass-action kinetics}, notes = {CEC 2007 - A joint meeting of the IEEE, the EPS, and the IET, Dräger, Andreas and Supper, Jochen and Planatscher, Hannes and Magnus, J{\o}rgen B. and Oldiges, Marco and Zell, Andreas IEEE Catalog Number: 07TH8963C}, pdf = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/Draeger2007a.pdf}, project = {abt_zell, bioinformatics}, url = {http://dx.doi.org/10.1109/CEC.2007.4424528}, } |
| [10] | Sebastian Schneegans and Philipp Vorst and Andreas Zell. Using {RFID} Snapshots for Mobile Robot Self-Localization. In Proceedings of the 3rd European Conference on Mobile Robots (ECMR
2007), pages 241--246,, Freiburg, Germany,September 19-21, 2007. [url]Bibtex@INPROCEEDINGS{schneegans2007rfid-snapshots,author = {Sebastian Schneegans and Philipp Vorst and Andreas Zell}, title = {Using {RFID} Snapshots for Mobile Robot Self-Localization}, booktitle = {Proceedings of the 3rd European Conference on Mobile Robots (ECMR 2007)}, year = {2007}, pages = {241--246}, address = {Freiburg, Germany}, month = {September 19-21}, abstract = {In recent years, radio frequency identification (RFID) has found its way into the field of mobile robot navigation. On the one hand, the technology promises to contribute solutions to common problems in self-localization and mapping such as the data association problem. On the other hand, questions like how to cope with poor or even missing range and bearing information remain open. In this paper, we present a novel method which tackles these challenges: Inspired by vision-based self-localization approaches, it utilizes RFID snapshots for the estimation of the robot pose. Our experiments show that the new technique enables a robot to successfully localize itself in an indoor environment. The accuracy is comparable to the one of a previous approach using an explicit model of detection probabilities. Our method, however, requires fewer iterations of the underlying particle filter in order to converge to the approximate robot pose.}, citeseerurl = {http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.72.9869}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/mitarb/vorst/publications/schneegans2007rfid-snapshots.html}, keywords = {RFID, mobile robot, self-localization, particle filter}, project = {abt_zell, robotics, ambisense, rfid}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/schneegans07ecmr.pdf}, } |
| [11] | Weiss, Christian and Masselli, Andreas and Zell, Andreas. Fast Vision-based Localization for Outdoor Robots Using a Combination
of Global Image Features. In 6th Symposium on Intelligent Autonomous Vehicles (IAV 2007), Toulouse, France,sep, 2007. [url]Bibtex@INPROCEEDINGS{2007_92,author = {Weiss, Christian and Masselli, Andreas and Zell, Andreas}, title = {Fast Vision-based Localization for Outdoor Robots Using a Combination of Global Image Features}, booktitle = {6th Symposium on Intelligent Autonomous Vehicles (IAV 2007)}, year = {2007}, address = {Toulouse, France}, month = {sep}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_92}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/weiss07iav.pdf}, } |
| [12] | Tamimi, Hashem and Weiss, Christian and Zell, Andreas. Appearance-Based Robot Localization Using Wavelets-PCA. In Autonome Mobile Systeme 2007: 20. Fachgespräch Kaiserslautern, pages 36-42,oct, 2007. Bibtex@INPROCEEDINGS{2007_96,author = {Tamimi, Hashem and Weiss, Christian and Zell, Andreas}, title = {Appearance-Based Robot Localization Using Wavelets-PCA}, booktitle = {Autonome Mobile Systeme 2007: 20. Fachgespräch Kaiserslautern}, year = {2007}, editor = {Brauer, W. and Karsten Berns and Tobias Luksch and Brauer, W. and Berns, K. and Luksch, T.}, series = {Informatik aktuell}, pages = {36-42}, month = {oct}, abstract = {This paper presents an efficient image based feature extraction approach to solve the robot localization problem. The approach has two stages: in the first stage, the image is transformed to the wavelet domain using the fast wavelet transform. In the second stage, Principal Component Analysis (PCA) is applied to the wavelet coefficients in order to further reduce the feature dimension by selecting the significant feature elements. The experiments show that the proposed approach is superior to the PCA-based approach and the wavelet-based approach. The main advantages of wavelets-PCA are the efficiency in extracting the features and the robustness against illumination changes.}, project = {abt_zell, robotics}, } |
| [13] | Beigi, Majid and Wang, Maosen and Zell, Andreas. Time-resolved spectrum kernel for biosonar target classification. In Fourth IASTED International Conference on Signal Processing, Pattern
Recognition, and Applications (SPPRA 2007), pages 126--131,2007. [url]Bibtex@INPROCEEDINGS{2007_107,author = {Beigi, Majid and Wang, Maosen and Zell, Andreas}, title = {Time-resolved spectrum kernel for biosonar target classification}, booktitle = {Fourth IASTED International Conference on Signal Processing, Pattern Recognition, and Applications (SPPRA 2007)}, year = {2007}, pages = {126--131}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_107}, project = {abt_zell}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/BeigiSpKernel2007.pdf}, } |
| [14] | Beigi, Majid and Zell, Andreas. Object Detection in Biosonar Based Robot Navigation. In Proceedings of the ICRA 2007 Workshop: Planning,Perception and Navigation
for Intelligent Vehicles2007. [url]Bibtex@INPROCEEDINGS{2007_108,author = {Beigi, Majid and Zell, Andreas}, title = {Object Detection in Biosonar Based Robot Navigation}, booktitle = {Proceedings of the ICRA 2007 Workshop: Planning,Perception and Navigation for Intelligent Vehicles}, year = {2007}, project = {abt_zell}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/BeigiICRA2007.pdf}, } |
| [15] | Beigi, Majid and Zell, Andreas. Synthetic protein sequence oversampling method for classification
and remote homology detection in imbalanced protein data. In International Conference on Bioinformatics Research and Development
(BIRD 2007), pages 263-277,, Berlin, Germany,2007. [url]Bibtex@INPROCEEDINGS{2007_4,author = {Beigi, Majid and Zell, Andreas}, title = {Synthetic protein sequence oversampling method for classification and remote homology detection in imbalanced protein data}, booktitle = {International Conference on Bioinformatics Research and Development (BIRD 2007)}, year = {2007}, volume = {4414}, series = {LNBI}, pages = {263-277}, address = {Berlin, Germany}, publisher = {Springer}, abstract = {Many classifiers are designed with the assumption of well-balanced datasets. But in real problems, like protein classification and remote homology detection, when using binary classifiers like support vector machine (SVM) and kernel methods, we are facing imbalanced data in which we have a low number of protein sequences as positive data (minor class) compared with negative data (major class). A widely used solution to that issue in protein classification is using a different error cost or decision threshold for positive and negative data to control the sensitivity of the classifiers. Our experiments show that when the datasets are highly imbalanced, and especially with overlapped datasets, the efficiency and stability of that method decreases. This paper shows that a combination of the above method and our suggested oversampling method for protein sequences can increase the sensitivity and also stability of the classifier. Synthetic Protein Sequence Oversampling (SPSO) method involves creating synthetic protein sequences of the minor class, considering the distribution of that class and also of the major class, and it operates in data space instead of feature space. We used G-protein-coupled receptors families as real data to classify them at subfamily and sub-subfamily levels (having low number of sequences) and could get better accuracy and Matthew's correlation coefficient than other previously published method. We also made artificial data with different distributions and overlappings of minor and major classes to measure the efficiency of our method. The method was evaluated by the area under the Receiver Operating Curve (ROC).}, project = {abt_zell, bioinformatics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/BeigiBird2007.pdf}, } |
| [16] | Heinemann, Patrick and Haase, Jürgen and Zell, Andreas. A Novel Approach to Efficient {Monte-Carlo} Localization in {RoboCup}. In RoboCup 2006: Robot Soccer World Cup X, pages 322-329,2007. [url]Bibtex@INPROCEEDINGS{2007_106,author = {Heinemann, Patrick and Haase, Jürgen and Zell, Andreas}, title = {A Novel Approach to Efficient {Monte-Carlo} Localization in {RoboCup}}, booktitle = {RoboCup 2006: Robot Soccer World Cup X}, year = {2007}, volume = {4434/2009}, series = {Lecture Notes in Computer Science}, pages = {322-329}, publisher = {Springer}, abstract = {Recently, efficient self-localization methods have been developed, among which probabilistic Monte-Carlo localization (MCL) is one of the most popular. However, standard MCL algorithms need at least 100 samples to compute an acceptable position estimation. This paper presents a novel approach to MCL that uses an adaptive number of samples that drops down to a single sample if the pose estimation is sufficiently accurate. Experiments show that the method remains in this efficient single sample tracking mode for more than 90% of the cycles.}, doi = {10.1007/978-3-540-74024-7_29}, isbn = {978-3-540-74023-0}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2006/heinemann07novel.pdf}, } |
| [17] | Heinemann, Patrick and Sehnke, Frank and Streichert, Felix and Zell,
Andreas. Towards a Calibration-Free Robot: The {ACT} Algorithm for Automatic
Online Color Training. In RoboCup 2006: Robot Soccer World Cup X, pages 363-370,2007. [url]Bibtex@INPROCEEDINGS{2007_105,author = {Heinemann, Patrick and Sehnke, Frank and Streichert, Felix and Zell, Andreas}, title = {Towards a Calibration-Free Robot: The {ACT} Algorithm for Automatic Online Color Training}, booktitle = {RoboCup 2006: Robot Soccer World Cup X}, year = {2007}, editor = {G. Lakemeyer and E. Sklar and D. G. Sorrenti and T. Takahashi}, volume = {4434}, series = {Lecture Notes in Computer Science}, pages = {363-370}, publisher = {Springer}, abstract = {Many approaches for object detection based on color coding were published in the RoboCup domain. They are tuned to the typical RoboCup scenario of constant lighting using a static subdivision of the color space. However, such algorithms will soon be of limited use, when playing under changing and finally natural lighting. This paper presents an algorithm for automatic color training, which is able to robustly adapt to different lighting situations online. Using the ACT algorithm a robot is able to play a RoboCup match while the illumination of the field varies.}, doi = {10.1007/978-3-540-74024-7_34}, isbn = {978-3-540-74023-0}, project = {abt_zell, robotics, robocup}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2006/heinemann07towards.pdf}, } |
| [18] | Kronfeld, Marcel and Weiss, Christian and Zell, Andreas. Swarm-supported Outdoor Localization with Sparse Visual Data. In 3rd European Conference on Mobile Robots (ECMR 2007), pages 259--264,, Freiburg, Germany,2007. [url]Bibtex@INPROCEEDINGS{Kron07Loc,author = {Kronfeld, Marcel and Weiss, Christian and Zell, Andreas}, title = {Swarm-supported Outdoor Localization with Sparse Visual Data}, booktitle = {3rd European Conference on Mobile Robots (ECMR 2007)}, year = {2007}, pages = {259--264}, address = {Freiburg, Germany}, abstract = {The localization of mobile systems with video data is a challenging field in robotic vision research. Apart from artificial environmental support technologies like GPS localization, a selfsufficient visual system is desirable. In this work, we introduce a new heuristic approach to outdoor localization in a scenario where no odometry readings are available. In an earlier work, we employed SIFT features and a common particle filter method in the scenario. A modification of Particle Swarm Optimization, a popular optimization technique especially in dynamically changing environments, is developed and fit to the localization problem, including self-adaptive mechanisms. The new method obtains similar or better localization results in our experiments, while requiring a fraction of SIFT comparisons of the standard method, indicating an all-over speed-up by 25%.}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?Kron07Loc}, project = {abt_zell, robotics, swarm-intelligence}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/Kron07SwarmSuppFinal.pdf}, } |
| [19] | Li, Xiang and Wang, Maosen and Zell, Andreas. Dribbling Control of Omnidirectional Soccer Robots. In IEEE International Conference on Robotics and Automation (ICRA'07), pages 2623-2628,, Roma, Italy,2007. [url]Bibtex@INPROCEEDINGS{2007_101,author = {Li, Xiang and Wang, Maosen and Zell, Andreas}, title = {Dribbling Control of Omnidirectional Soccer Robots}, booktitle = {IEEE International Conference on Robotics and Automation (ICRA'07)}, year = {2007}, pages = {2623-2628}, address = {Roma, Italy}, publisher = {IEEE}, abstract = {This paper focuses on the dribbling control problem of an omnidirectional mobile robot. Because the movement of the dribbled object must be considered, dribbling control is more challenging than normal mobile robot motion control. A new feedback control algorithm, which steers a reference point to follow the desired movement and keeps the ball near to this point simultaneously, is proposed. To dribble a rolling ball along a given path, the robot should provide the ball with appropriate force by consecutive pushing operations when they travel in an environment with obstacles. Based on the analysis of the forces acting on the ball with respect to the mobile robot coordinate system, a constraint for robot movement in the dribbling process is also introduced. The simulation and real-world experiments address the performance of this control algorithm.}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_101}, doi = {10.1109/ROBOT.2007.363861}, isbn = {1-4244-0601-3}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/li07ICRA.pdf}, } |
| [20] | Li, Xiang and Zell, Andreas. {H} Infinity Filtering for a Mobile Robot Tracking a Free Rolling
Ball. In RoboCup 2006: Robot Soccer World Cup X, pages 296-303,2007. [url]Bibtex@INPROCEEDINGS{2007_103,author = {Li, Xiang and Zell, Andreas}, title = {{H} Infinity Filtering for a Mobile Robot Tracking a Free Rolling Ball}, booktitle = {RoboCup 2006: Robot Soccer World Cup X}, year = {2007}, editor = {Gerhard Lakemeyer and Elizabeth Sklar and Domenico G. Sorrenti and Tomoichi Takahashi}, volume = {4434}, pages = {296-303}, publisher = {Springer}, doi = {10.1007/978-3-540-74024-7_26}, ee = {http://dx.doi.org/10.1007/978-3-540-74024-7_26}, isbn = {978-3-540-74023-0}, journal = {Lecture Notes in Computer Science}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2006/li06Hinfinity.pdf}, } |
| [21] | Li, Xiang and Zell, Andreas. Motion control of an omnidirectional mobile robot. In Proceedings of the 4th International Conference on Informatics in
Control, Automation and Robotics, ICINCO'07), pages 181-193,, Angers, France,2007. [url]Bibtex@INPROCEEDINGS{2007_102,author = {Li, Xiang and Zell, Andreas}, title = {Motion control of an omnidirectional mobile robot}, booktitle = {Proceedings of the 4th International Conference on Informatics in Control, Automation and Robotics, ICINCO'07)}, year = {2007}, volume = {24}, series = {Lecture Notes in Electrical Engineering}, pages = {181-193}, address = {Angers, France}, publisher = {Springer}, abstract = {This paper focuses on the motion control problem of an omnidirectional mobile robot. A new control method based on the inverse input-output linearized kinematic model is proposed. As the actuator saturation and actuator dynamics have important impacts on the robot performance, this control law takes into account these two aspects and guarantees the stability of the closed-loop control system. Real-world experiments with an omnidirectional middle-size RoboCup robot verify the performance of this proposed control algorithm.}, doi = {10.1007/978-3-540-85640-5_14}, isbn = {978-3-540-85639-9}, issn = {1876-1100}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/li07ICINCO.pdf}, } |
| [22] | Schmitz, Gerd H. and Wöhling, Thomas and de Paly, Michael and Schütze,
Niels. Gain-P: A New Strategy To Increase Furrow Irrigation Efficiency. , pages 103-116,2007. Bibtex@ARTICLE{Schmitz07,author = {Schmitz, Gerd H. and Wöhling, Thomas and de Paly, Michael and Schütze, Niels}, title = {Gain-P: A New Strategy To Increase Furrow Irrigation Efficiency}, journal = {Arabian Journal for Science and Engineering}, year = {2007}, volume = {32}, pages = {103-116}, number = {1}, owner = {paly}, project = {extern, irrigation, hydrogeo, optimization}, timestamp = {2010.01.25}, } |
| [23] | Strauch, Martin and Supper, Jochen and Spieth, Christian and Wanke,
Dierk and Kilian, Joachim and Harter, Klaus and Zell, Andreas. A Two-Step Clustering for 3-D Gene Expression Data Reveals the Main
Features of the Arabidopsis Stress Response. 2007. [url]Bibtex@ARTICLE{2007_38,author = {Strauch, Martin and Supper, Jochen and Spieth, Christian and Wanke, Dierk and Kilian, Joachim and Harter, Klaus and Zell, Andreas}, title = {A Two-Step Clustering for 3-D Gene Expression Data Reveals the Main Features of the Arabidopsis Stress Response}, journal = {Journal of Integrative Bioinformatics}, year = {2007}, volume = {4}, number = {1}, abstract = {We developed an integrative approach for discovering gene modules, i.e. genes that are tightly correlated under several experimental conditions and applied it to a threedimensional Arabidopsis thaliana microarray dataset. The dataset consists of approximately 23000 genes responding to 9 abiotic stress conditions at 6-9 different points in time. Our approach aims at finding relatively small and dense modules lending themselves to a specific biological interpretation. In order to detect gene modules within this dataset, we employ a two-step clustering process. In the first step, a k-means clustering on one condition is performed, which is subsequently used in the second step as a seed for the clustering of the remaining conditions. To validate the significance of the obtained modules, we performed a permutation analysis and determined a null hypothesis to compare the module scores against, providing a p-value for each module. Significant modules were mapped to the Gene Ontology (GO) in order to determine the participating biological processes. As a result, we isolated modules showing high significance with respect to the p-values obtained by permutation analysis and GO mapping. In these modules we identified a number of genes that are either part of a general stress response with similar characteristics under different conditions (coherent modules), or part of a more specific stress response to a single stress condition (single response modules). We also found genes clustering within several conditions, which are, however, not part of a coherent module. These genes have a distinct temporal response under each condition. We call the modules they are contained in individual response modules (IR).}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_38}, doi = {10.2390/biecoll-jib-2007-54}, project = {abt_zell, bioinformatics}, url = {http://journal.imbio.de/articles/pdf/jib-54.pdf}, } |
| [24] | Felix Streichert. Evolutionary Algorithms in Multi-Modal and Multi-Objective Environments. , Tübingen, Germany,2007. Bibtex@PHDTHESIS{Streichert07,author = {Felix Streichert}, title = {Evolutionary Algorithms in Multi-Modal and Multi-Objective Environments}, school = {University of Tübingen}, year = {2007}, address = {Tübingen, Germany}, isbn = {978-3-8325-1552-2}, project = {optimization, javaeva}, } |
| [25] | Sung, Alexander and Klöpper, Florian and Mitterer, Alexander and
Wachtmeister, Georg and Zell, Andreas. {Modellbasierte Online-Optimierung in der Simulation und am Motorenprüfstand}. , pages 42-49,2007. [url]Bibtex@ARTICLE{2007_97,author = {Sung, Alexander and Klöpper, Florian and Mitterer, Alexander and Wachtmeister, Georg and Zell, Andreas}, title = {{Modellbasierte Online-Optimierung in der Simulation und am Motorenprüfstand}}, journal = {MTZ-Motortechnische Zeitschrift}, year = {2007}, volume = {68}, pages = {42-49}, number = {1}, issn = {0024-8525 10814}, project = {abt_zell}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/OnlineOpti_BMW_m01-07-09.pdf}, } |
| [26] | Sung, Alexander and Zell, Andreas and Klöpper, Florian and Vogel,
Alexander. Target Value Prediction For Online Optimization At Engine Test Beds. In 4th International Conference on Informatics in Control, Automation
and Robotics (ICINCO'07), pages 108-115,, Angers, France,2007. [url]Bibtex@INPROCEEDINGS{2007_98,author = {Sung, Alexander and Zell, Andreas and Klöpper, Florian and Vogel, Alexander}, title = {Target Value Prediction For Online Optimization At Engine Test Beds}, booktitle = {4th International Conference on Informatics in Control, Automation and Robotics (ICINCO'07)}, year = {2007}, pages = {108-115}, address = {Angers, France}, project = {abt_zell}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/TargetValuePrediction.pdf}, } |
| [27] | Supper, Jochen and Spieth, Christian and Zell, Andreas. Reconstructing Linear Gene Regulatory Networks. In Proceedings of the 5th European Conference on Evolutionary Computation,
Machine Learning and Data Mining in Bioinformatics (EvoBIO 2007), pages 270-279,, Valencia, Spain,2007. Bibtex@INPROCEEDINGS{2007_39,author = {Supper, Jochen and Spieth, Christian and Zell, Andreas}, title = {Reconstructing Linear Gene Regulatory Networks}, booktitle = {Proceedings of the 5th European Conference on Evolutionary Computation, Machine Learning and Data Mining in Bioinformatics (EvoBIO 2007)}, year = {2007}, editor = {Elena Marchiori and Jason H. Moore and Jagath C. Rajapakse}, volume = {4447}, series = {Lecture Notes in Computer Science}, pages = {270-279}, address = {Valencia, Spain}, publisher = {Springer}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_39}, isbn = {978-3-540-71782-9}, project = {abt_zell, bioinformatics}, } |
| [28] | Supper, Jochen and Strauch, Martin and Wanke, Dierk and Harter, Klaus
and Zell, Andreas. {EDISA}: extracting biclusters from multiple time-series of gene
expression profiles. , pages 334,2007. [url]Bibtex@ARTICLE{2007_5,author = {Supper, Jochen and Strauch, Martin and Wanke, Dierk and Harter, Klaus and Zell, Andreas}, title = {{EDISA}: extracting biclusters from multiple time-series of gene expression profiles}, journal = {BMC Bioinformatics}, year = {2007}, volume = {8}, pages = {334}, number = {1}, abstract = {Background: Cells dynamically adapt their gene expression patterns in response to various stimuli. This response is orchestrated into a number of gene expression modules consisting of co-regulated genes. A growing pool of publicly available microarray datasets allows the identification of modules by monitoring expression changes over time. These time-series datasets can be searched for gene expression modules by one of the many clustering methods published to date. For an integrative analysis, several time-series datasets can be joined into a three-dimensional gene-condition-time dataset, to which standard clustering or biclustering methods are, however, not applicable. We thus devise a probabilistic clustering algorithm for gene-condition-time datasets. Results: In this work, we present the EDISA (Extended Dimension Iterative Signature Algorithm), a novel probabilistic clustering approach for 3D gene-condition-time datasets. Based on mathematical definitions of gene expression modules, the EDISA samples initial modules from the dataset which are then refined by removing genes and conditions until they comply with the module definition. A subsequent extension step ensures gene and condition maximality. We applied the algorithm to a synthetic dataset and were able to successfully recover the implanted modules over a range of background noise intensities. Analysis of microarray datasets has lead us to define three biologically relevant module types: 1) We found modules with independent response profiles to be the most prevalent ones. These modules comprise genes which are co-regulated under several conditions, yet with a different response pattern under each condition. 2) Coherent modules with similar responses under all conditions occurred frequently, too, and were often contained within these modules. 3) A third module type, which covers a response specific to a single condition was also detected, but rarely. All of these modules are essentially different types of biclusters. Conclusion: We successfully applied the EDISA to different 3D datasets. While previous studies were mostly aimed at detecting coherent modules only, our results show that coherent responses are often part of a more general module type with independent response profiles under different conditions. Our approach thus allows for a more comprehensive view of the gene expression response. After subsequent analysis of the resulting modules, the EDISA helped to shed light on the global organization of transcriptional control. An implementation of the algorithm is available at \url{http://www-ra.informatik.uni-tuebingen.de/software/IAGEN/}.}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_5}, doi = {10.1186/1471-2105-8-334}, issn = {1471-2105}, project = {abt_zell, bioinformatics}, url = {http://www.biomedcentral.com/1471-2105/8/334}, } |
| [29] | Weiss, Christian and Fechner, Nikolas and Stark, Matthias and Zell,
Andreas. Comparison of Different Approaches to Vibration-based Terrain Classification. In 3rd European Conference on Mobile Robots (ECMR 2007), pages 7-12,, Freiburg, Germany,2007. [url]Bibtex@INPROCEEDINGS{2007_93,author = {Weiss, Christian and Fechner, Nikolas and Stark, Matthias and Zell, Andreas}, title = {Comparison of Different Approaches to Vibration-based Terrain Classification}, booktitle = {3rd European Conference on Mobile Robots (ECMR 2007)}, year = {2007}, pages = {7-12}, address = {Freiburg, Germany}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/weiss07ecmr.pdf}, } |
| [30] | Weiss, Christian and Stark, Matthias and Zell, Andreas. {SVMs} for Vibration-based Terrain Classification. In Proc. Autonome Mobile Systeme (AMS), pages 1--7,, Kaiserslautern, Germany,2007. [url]Bibtex@INPROCEEDINGS{2007_95,author = {Weiss, Christian and Stark, Matthias and Zell, Andreas}, title = {{SVMs} for Vibration-based Terrain Classification}, booktitle = {Proc. Autonome Mobile Systeme (AMS)}, year = {2007}, pages = {1--7}, address = {Kaiserslautern, Germany}, publisher = {Springer}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/weiss07ams.pdf}, } |
| [31] | Weiss, Christian and Tamimi, Hashem and Masselli, Andreas and Zell,
Andreas. A hybrid approach for vision-based outdoor robot localization using
global and local image features. In IEEE/RSJ International Conference on Intelligent Robots and Systems
(IROS 2007), pages 1047-1052,, San Diego, CA, USA,2007. [url]Bibtex@INPROCEEDINGS{2007_94,author = {Weiss, Christian and Tamimi, Hashem and Masselli, Andreas and Zell, Andreas}, title = {A hybrid approach for vision-based outdoor robot localization using global and local image features}, booktitle = {IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2007)}, year = {2007}, pages = {1047-1052}, address = {San Diego, CA, USA}, detailspage = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/LiteraturDB/details.html?2007_94}, project = {abt_zell, robotics}, url = {http://www.cogsys.cs.uni-tuebingen.de/publikationen/2007/weiss07iros.pdf}, } |