One proves existence and uniqueness of strong solutions to stochastic porous media equations under minimal monotonicity conditions on the nonlinearity. In particular, we do not assume continuity of the drift or any growth condition at infinity. AMS subject Classification 2000: 76S05, 60H15. Supported by the CEEX Project 05 of Romanian Minister of Research. Supported by the research program “Equ...

Active Queue Management (AQM) can potentially reduce packet loss rate in the Internet. This is used by routers for control congestion, where packets are dropped before queues become full. In this paper, comparative study has been done using NS2 simulator. By examine five different AQM techniques i.e. RED, RIO, SFB, SRR and BLUE the performance of network has been evaluated on the basis of three...

We derive the probability limit of the standard Dickey-Fuller-test in the context of an exponential random walk. This result might be useful in interpreting tests for unit roots when the test is inadvertantly applied to the levels of the data when the "true" random walk is in the logs. 1 Research supported by Deutsche Forschungsgemeinschaft via SFB 475; we are grateful to Werner Ploberger for h...

Raumkognition befasst sich mit dem Erwerb, der Organisation, der Verwendung und der Revision von Wissen über raum-zeitliche Domänen. Sie ermöglicht kognitiven Agenten (insbesondere Menschen, Tieren und Robotern), in räumlichen Umgebungen intelligent zu handeln, zu interagieren und zweckbezogen über Raum zu kommunizieren. Raumzeitliche kognitive Fähigkeiten bilden die Grundlage für fundamentale ...

1 We thank Menesh Patel and John Straub for research assistance and thank Vince Crawford for helpful comments. The instructions and data for the experiments reported in this paper are posted at http://www.nyu.edu/jet/supplementary.html. Financial support from the ESRC Centre for Economic Learning and Social Evolution at University College London, the National Science Foundation, and the Deutsch...

∗ Financial support was received from the Center for Rationality, Hebrew University in Jerusalem, the Deutsche Forschungsgemeinschaft, SFB 373 (“Quantifikation und Simulation Ökonomischer Prozesse”), Humboldt-Universität zu Berlin, the Koret Foundation, and the EUTMR Research Network ENDEAR (FMRX-CT98-0238). We are grateful to Filippo Caffarelli for bringing to our attention the ENI auction pro...

Acknowledgement: The ASN project is granted in part by the Collaborative Research Center (Sonderforschungsbereich) SFB 374 through the DFG (Deutsche Forschungsgemeinschaft). Several Institutes from the University of Stuttgart and Fraunhofer-Gesellschaft as well as DaimlerChrysler are in this project cooperating. ISBN 0-85825-788-2, pp. 636-637". As a courtesy to the publisher, this paper may no...

While computers assist humans with tasks such as navigation that involve spatial aspects, agents that can interact in a meaningful way in this context are still in their infancy. One core issue is the mismatch in the representation of spatial information a computer-based system is likely to use, and the one a human is likely to use. Computers are better suited for quantitative schemes such as m...

Conclusion Context: A sketch of our research perspective Analyzing learner language I Intelligent Tutoring System TAGARELA for Portuguese (Amaral & Meurers 2008, 2009, 2011; Amaral et al. 2011) I Automatic analysis of learner language (Meurers 2009) I Linguistic analysis of NOCE corpus of English written by Spanish learners (Dı́az-Negrillo, Meurers, Valera & Wunsch 2010) I Word order errors (Met...

∗Speaker. †We (S.D. and P.U.) thank the Galileo Galilei Institute for Theoretical Physics in Florence for the hospitality and the INFN for partial support during the completion of this work. P.U. is supported as Heisenberg Fellow of the Deutsche Forschungsgemeinschaft DFG. This work is supported in part by the European Community’s Marie-Curie Research Training Network HEPTOOLS under contract MR...