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Kunde oder Bürger
(1999)Arbeitsberichte Verkehrs- und RaumplanungVerkehrsteilnehmer wissen oft sehr genau, dass ihr Verhalten nicht dem allgemeinen Interesse entspricht, fühlen sich aber trotzdem gerechtfertigt, da sie ihr Handeln als Teil ihrer Konsumentenfreiheit verstehen. Dieses Dilemma findet seinen Widerhall in den aktuellen Schwierigkeiten der westlichen Staaten einen angemessenen Ordnungsrahmen für ihre grossen Infrastrukturen zu definieren: alles vom staatlichem Monopol bis zu unregulierten ...Report -
Using domain-specific languages for the realization of component composition
(1999)TIK ReportIn recent years, component-based development has evolved to one of the key technologies in software engineering, because it provides a promising way to deal with large scale software developments. Due to this, the realization of component interactions has become an important task while implementing a system being assembled from (existing) components. Scripting languages, like Perl, Tcl, Unix-Shell, are often used for implementing this ...Report -
Comparison of multiobjective evolutionary algorithms: empirical results (Revised Version)
(1999)TIK ReportIn this paper, we provide a systematic comparison of various evolutionary approaches to multiobjective optimization using six carefully chosen test functions. Each test function involves a particular feature that is known to cause difficulty in the evolutionary optimization process, mainly in converging to the Pareto-optimal front (e.g., multimodality and deception). By investigating these different problem features separately, it is ...Report -
From ease in programming to easy maintenance: extending DSL usability with montages
(1999)TIK ReportMontages is a formalism for giving executable specifications of programming languages. In contrast to related formalisms, it is state-based, and specifications can be given in an imperative or object-oriented style with which most programmers are comfortable. Hence, in the context of Domain Specific Languages (DSLs), it provides a framework in which domain engineers can themselves extend and maintain their language. It also uses visual ...Report -
Geometric meshes in collocation methods for Volterra integral equations with proportional time delays
(1999)SAM Research ReportIn this paper we introduce new kind of nonuniform mesh, the so-called geometric mesh, and discuss the corresponding collocation method for Volterra integral equations of the second kind with proportional delay of the form $qt$ ($0 < q < 1$). It will be shown that, in contrast to the uniform mesh, the iterated collocation solution associated with such a mesh exhibits almost optimal superconvergence at the mesh points, provided that collocation ...Report -
Dynamic semantics for language-based programming environments revisited
(1999)TIK ReportMontages are a semi-visual language specification formalism recently proposed by some of the authors. This framework has been successfully used to give complete executable specifications of languages like C and Java. This paper compares Montages with action equations, both being paradigms for incorporating a means for specifying dynamic semantics in an environment generator using an attribute grammar framework. The major differences between ...Report -
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An hp a-priori error analysis of the DG time-stepping method for initial value problems
(1999)SAM Research ReportThe Discontinuous Galerkin (DG) time-stepping method for the numerical solution of initial value ODEs is analyzed in the context of the hp-version of the Galerkin method. New a-priori error bounds explicit in the time steps and in the approximation orders are derived and it is proved that the DG method gives spectral and exponential accuracy for problems with smooth and analytic time dependence, respectively. It is further shown that ...Report -
Performance evaluation of recent DRAM architectures for embedded systems
(1999)TIK ReportThe growing gap between processor speed and memory access time becomes more and more a performance limiting factor in modern computing systems. Therefore, DRAM manufactures try to improve memory throughput by developing new memory interfaces around basically unchanged memory cores. This report focuses on embedded systems, i.e., systems which utilize less cache space and fewer memory hierarchy levels than ordinary PC or workstation systems ...Report -