http://dl.gi.de/handle/20.500.12116/21454 2026-07-22T20:35:11Z 2026-07-22T20:35:11Z Russ, Aaron Hesse, Wolfgang Müller, Dirk http://dl.gi.de/handle/20.500.12116/21468 2019-04-03T13:21:50Z 2008-01-01T00:00:00Z

Ambient Information Systems – Do They Open a New Quality of IS? Russ, Aaron; Hesse, Wolfgang; Müller, Dirk Hesse, Wolfgang; Oberweis, Andreas Information Systems (IS) have influenced and changed our lives in the past 50 years more than anything else – be it in the professional, be it in the private sector. Three main qualities have leveraged IS to this extraordinary position: persistence (supporting and extending human memories), individual availability and distribution – now world-wide through the internet and innumerable web- based applications and services. At the beginning 21st century, new technical prospects are opening new dimensions for IS: Due to the progressive miniaturisation of hardware components, next IS generations are mobile and pervasive, do no longer reside in computer mainframes and workstations but are clusters of “intelligence” which can be implanted almost everywhere and have thus been termed ambient or ubiquitous. In this article, we will briefly review the concept and history of IS and try to define what Ambient Information Systems (AIS) might be and which role they might play in a future Information Society. In particular, we shall deal with the phenomena of information and ambience, investigate their semiotic dimensions – and raise the question whether and how far human qualities like intelligence, intention, etc. can be attributed to impersonal, highly heterogeneous and maybe abstract systems. If we are going to embed ourselves in ambient systems, if we grant these to deal with information (instead of data) and to act intelligently, this might profoundly influence our image of man – in particular as qualities like autonomy, privacy or self-esteem are concerned.

2008-01-01T00:00:00Z Herfurth, Maik Karle, Thomas Schoenthaler, Frank http://dl.gi.de/handle/20.500.12116/21463 2019-04-03T13:21:50Z 2008-01-01T00:00:00Z

Reference Model for service oriented Business Software based on Web Service Nets Herfurth, Maik; Karle, Thomas; Schoenthaler, Frank Hesse, Wolfgang; Oberweis, Andreas Configurable business software solutions are increasingly being implemented based on service oriented architectures (SOA). Hereunto model driven approaches for the definition and implementation of such software systems are indispensable. In addition reference models with predefined business processes can accelerate decisively the implementation of standard software solutions. In this paper we present a new integrated service oriented approach of a multi-layer model. XML nets, a kind of high-level Petri nets based on XML standards and Web Service nets that are additionally based on web service standards provide the creation of reference models for configurable business software solutions and can be used for the implementation. The reference models are structured in layers of different kind of granularity. Within these layers complex processes can be orchestrated using business process components. The business flows within the capsulated processes are defined with Web Service nets considering the respective standards of web services. With this hierarchical model, business processes of a configurable business software solution can be described from the rough process flow up to detailed functions and detailed instructions based on a formal model. Due to the use of web service standards, the process models might be assigned to implemented WS-BPEL processes of the business software or WS-BPEL processes might be generated using new or updated process models.

2008-01-01T00:00:00Z Guckert, Michael Gerlach, René http://dl.gi.de/handle/20.500.12116/21464 2019-04-03T13:21:50Z 2008-01-01T00:00:00Z

Relational Model Driven Application Design Guckert, Michael; Gerlach, René Hesse, Wolfgang; Oberweis, Andreas A closer look at typical information systems shows that rela- tively simple routines often contribute significantly to the overall expenses of the software development process. Moreover an empirical study examining the commercial off-the-shelf solution eVMS for the administration of contracts in the public transport business revealed that structurally similar simple code outweighed (measured in lines of code and the number of online dialogs) complex code that implements complicated business processes. Exploiting structural database information enriched with additional application specific metadata allows automation of routine tasks thus reducing development expenses and additionally promising higher product quality. RMDAD transforms relational database metadata into a generic object model. At runtime the RMDAD-interpreter exploits this object model to dynamically generate application code on the fly.

2008-01-01T00:00:00Z Hon, Yuen Man Gayen, Jan-Tecker Ehrich, Hans-Dieter http://dl.gi.de/handle/20.500.12116/21465 2019-04-03T13:21:50Z 2008-01-01T00:00:00Z

OOLH: A formal framework for specifying system requirements Hon, Yuen Man; Gayen, Jan-Tecker; Ehrich, Hans-Dieter Hesse, Wolfgang; Oberweis, Andreas Most of the system requirements are written in natural language. It is not easy for the system development team to understand this document unambiguously without domain specific knowledge. It is difficult to check the correctness of these requirements. A formal framework called Object Oriented Lastenheft (German for re- quirements specification) (OOLH) is proposed as a solution to handle these problems 1. This framework provides well-defined mathematical concepts to formulate system requirements. These well-formalized system requirements can be analyzed and understood easier and their consistency can be checked based on the mathematical concepts. A tool, called OOLH tool, is implemented to support analyzing, verifying and checking consistency of formulas in OOLH. Logical formulas can be transformed into decision tables and truth tables. The expected behavior or a design can be specified in decision tables in this tool, such that the correctness of requirements can be verified.

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