Abstract. The majority of object migration systems do not support heterogeneous environments. Few systems solve this challenge by specifying a platform and language independent state transfer format, requiring a compatible implementation for every target language. However, fields of research like Ubiquitous and Pervasive Computing with mobile users and applications demand an even more platform-independent, flexible and adaptive approach. This paper presents a novel approach for adaptive object and agent migration in heterogeneous environments based on our former work enabling language-and platform-independent object mobility in CORBA. By providing flexible mechanisms to reduce, expand and transform an object's state and functionality during migration, we support adaptation to the context and application-specific demands at the target system. This is achieved by introducing a separation of state, functionality and implementation code instead of mapping particular state on particular code. Our prototype system supports object migration from Java to C++ and vice versa. In principle, our concept can be transferred to any CORBA-supported programming language.

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Abstract. Smartphones and tablet PCs are on the verge of revolutionizing the information society by offering high quality applications and almost permanent connectivity to the Internet in a mobile world. They naturally support new applications that take advantage of context information like location, time and other environmental conditions. However, developing these novel context-aware applications is challenging as it is difficult to a priori anticipate their execution context and the adaptations that might be necessary to use new context information. This issue is reinforced by the semantic gap between the low-level technical realization of adaptation mechanisms and the demand to describe adaptations in abstract and comprehensible business terms. This paper presents programming support for context-aware adaptations based on a semantic model that builds on the AOCI framework. Using such a model, applications and adaptations can be described by means of easy to comprehend business terms. Thereby the model enables the AOCI framework to store and publish both context and domain-specific run-time information and provides a basis for high-level and tailored programming support. This enables to transparently select adaptations based on various criteria and integrate them into applications at run-time. At the level of adaptation mechanisms our approach supports integration for permanent changes using Aspect-Oriented Programming and more importantly for spontaneous and short-time integration of web services by means of interceptors.

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