AspectS supports aspect-oriented programming (AOP) in Smalltalk using meta-programming. The goal of the AspectS project is to provide a platform for the exploration of AOP in the context of dynamic systems. In its implementation, AspectS makes use of Method Wrappers as an approach to place advice-related computation at specific join points. Different kinds of Method Wrappers are used for differ...

This paper illustrates how aspect-oriented programming techniques support some tasks whose implementation using conventional object-oriented programming would be extremely time-consuming and error-prone. In particular, we have successfully employed aspects to evaluate and monitor the I/O performance of alternative data mining techniques. Without having to modify the source code of the system un...

Software systems can have properties which affect multiple components. Examples of such concerns include debugging and synchronization policies. These cross-cutting concerns are called aspects. Aspects lead to complex systems that are difficult to develop and hard to maintain. The goal of aspect-oriented programming is to support the programmer to separate components and aspects from each other...

Stepwise refinement (SWR) is fundamental to software engineering. As aspectoriented programming (AOP) is gaining momentum in software development, aspects should be considered in the light of SWR. In this paper, we elaborate the notion of aspect refinement that unifies AOP and SWR at the architectural level. To reflect this unification to the programming language level, we present an implementa...

Stepwise refinement (SWR) is fundamental to software engineering. As aspect-oriented programming (AOP) gains momentum in software development, aspects should be subject to SWR as well. In this paper, we introduce the notion of aspect refinement that unifies AOP and SWR. To reflect this unification to programming language level, we present an implementation technique for refining aspects based o...

Algorithmic thinking and problem solving strategies are essential principles of computer science. Programming education should reflect this and emphasize different aspects of these principles rather than syntactical details of a concrete programming language. In this paper, we identify three major aspects of algorithmic thinking as objectives of our curricula: the notion of a formal language to...

Besides object-orientation, generic types or templates and aspectoriented programming (AOP) gain increasing popularity as they provide additional dimensions of decomposition. Most modern programming languages like Ada, Eiffel, and C++ already have built-in support for templates. For Java and C# similar extensions will be available in the near future. Even though promising, the combination of as...

Tasks of an application program of an embedded system are managed by the scheduler of a real-time operating system (RTOS). Most RTOSs adopt just fixed priority scheduling, which is not optimal in all cases. Some applications require earliest deadline first (EDF) scheduling, which is an optimal scheduling algorithm. In order to develop an efficient real-time embedded system, the scheduling algor...

In this paper we aim to compare the Ruby programming language with one the most popular Object Oriented Programming languages Java. For this study, we concentrate on three main aspects for comparing the performance of Ruby with