Gerald Hübsch

Comprehensive structured context profiles (CSCP): design and experiences

In dynamic heterogeneous environments, such as pervasive computing, context-aware adaptation is a key concept to meet the varying requirements of different clients. To enable such functionality, context information must be gathered and eventually presented to the application performing the adaptation. Therefore, a common representation format for the context information is required. We introduce a novel representation language for context information: comprehensive structured context profiles (CSCP). CSCP is based on the resource description framework (RDF) and is designed to be comprehensive and thoroughly structured to describe the entire context of mobile sessions. Besides the design of CSCP, we describe our experiences with CSCP in a running system, a mobility portal for context-aware adaptive access to email and Web information services.

The ServFace builder - A WYSIWYG approach for building service-based applications

In this paper we present the ServFace Builder, an authoring tool that enables people without programming skills to design and create service-based interactive applications in a graphical manner. The tool exploits the concept of service annotations for developing multipage interactive applications targeting various platforms and devices.

Overview of an end-user enabled model-driven development approach for interactive applications based on annotated services

Developing Service-based interactive applications is a time consuming and nontrivial task. The idea of annotating Web Services with information fragments used for deriving parts of interactive applications automatically promises the simplification of this task, thus enabling the creation of Service-based interactive applications for end-users without any implementation skills. The paper discusses a model-driven approach for generating executable Service-based interactive applications directly from the output of a visual authoring tool. Besides the introduction of details about the model-driven methodology, this paper makes two central contributions: Firstly, technical details about the developed end-user enabled authoring tool are introduced. Secondly, the meta-model applied as serialization format of the authoring tool and as input for an application generation approach is presented.

An Integrated Approach for Creating Service-Based Interactive Applications

While the implementation of business logic and business processes based on service-oriented architectures is well-understood and covered by existing development approaches, integrated concepts that empower users to exploit the Internet of Services to create complex interactive applications are missing. In this paper, we present an integrated approach that fills this gap. Our approach builds upon service annotations that add meta-information related to user interface generation, service dependencies, and service composition to existing service descriptions. Services can be composed visually to complex interactive applications based on these annotations without the need to write any code. The application code is generated completely from the service composition description. Our approach is able to support heterogeneous target environments ranging from client/server architectures to mobile platforms.

A model-driven approach for developing adaptive software systems

Context-awareness and adaptation are highly interrelated key concepts to build applications for heterogeneous and dynamic execution environments. While gathering, distribution, abstraction, and management of context is examined in research for several years, development of context-aware, adaptive applications, and the relations between context and adaptation are rarely considered. We present a model-driven approach for developing adaptive software. It comprises a design methodology, a set of software engineering artefacts, and a runtime platform for adaptive, multimodal software. Our approach focusses on modelling context information, context providers, and their relations to system functionality and user interface adaptation. We developed an adaptive plant maintenance application to show the feasibility of our methodology.

An Integrated Platform for Mobile, Context- Aware, and Adaptive Enterprise Applications

In this paper we present an approach for the device-independent authoring of mobile, context-aware and adaptive web applications. We present concepts for the semantic and syntactic adaptation of web dialogs to heterogeneous devices based on the Dialog Description Language. We describe advanced concepts for the integration of dynamic content and user interaction handling in device-independent application engineering. Furthermore, the software architecture of the Transcoding Framework, a runtime environment for dialog adaptation, is introduced. Finally, we present an adaptive sample application and give an outlook to future research topics.

Anwendung dienstorientierter Ansätze im Kontext der Erstellung von Benutzungsschnittstellen für serviceorientierte Applikationen

Marius Feldmann studierte von 2002 bis 2007 an der Technischen Universität Dresden Informatik und ist seit 2005 zunächst als studentische Hilfskraft und später als wissenschaftlicher Mitarbeiter am dortigen Lehrstuhl Rechnernetze engagiert. Seit 2008 arbeitet er im Rahmen des europäischen Forschungsprojektes (FP7) ServFace an innovativen Ansätzen zur Entwicklung von Benutzungsschnittstellen für Web Services.