@phdthesis{Blum2010, author = {Blum, Niklas}, title = {Formalization of a converged internet and telecommunications service environment}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-51146}, school = {Universit{\"a}t Potsdam}, year = {2010}, abstract = {The programmable network envisioned in the 1990s within standardization and research for the Intelligent Network is currently coming into reality using IPbased Next Generation Networks (NGN) and applying Service-Oriented Architecture (SOA) principles for service creation, execution, and hosting. SOA is the foundation for both next-generation telecommunications and middleware architectures, which are rapidly converging on top of commodity transport services. Services such as triple/quadruple play, multimedia messaging, and presence are enabled by the emerging service-oriented IPMultimedia Subsystem (IMS), and allow telecommunications service providers to maintain, if not improve, their position in the marketplace. SOA becomes the de facto standard in next-generation middleware systems as the system model of choice to interconnect service consumers and providers within and between enterprises. We leverage previous research activities in overlay networking technologies along with recent advances in network abstraction, service exposure, and service creation to develop a paradigm for a service environment providing converged Internet and Telecommunications services that we call Service Broker. Such a Service Broker provides mechanisms to combine and mediate between different service paradigms from the two domains Internet/WWW and telecommunications. Furthermore, it enables the composition of services across these domains and is capable of defining and applying temporal constraints during creation and execution time. By adding network-awareness into the service fabric, such a Service Broker may also act as a next generation network-to-service element allowing the composition of crossdomain and cross-layer network and service resources. The contribution of this research is threefold: first, we analyze and classify principles and technologies from Information Technologies (IT) and telecommunications to identify and discuss issues allowing cross-domain composition in a converging service layer. Second, we discuss service composition methods allowing the creation of converged services on an abstract level; in particular, we present a formalized method for model-checking of such compositions. Finally, we propose a Service Broker architecture converging Internet and Telecom services. This environment enables cross-domain feature interaction in services through formalized obligation policies acting as constraints during service discovery, creation, and execution time.}, language = {en} } @phdthesis{Ishebabi2010, author = {Ishebabi, Harold}, title = {Architecture synthesis for adaptive multiprocessor systems on chip}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:517-opus-41316}, school = {Universit{\"a}t Potsdam}, year = {2010}, abstract = {This thesis presents methods for automated synthesis of flexible chip multiprocessor systems from parallel programs targeted at FPGAs to exploit both task-level parallelism and architecture customization. Automated synthesis is necessitated by the complexity of the design space. A detailed description of the design space is provided in order to determine which parameters should be modeled to facilitate automated synthesis by optimizing a cost function, the emphasis being placed on inclusive modeling of parameters from application, architectural and physical subspaces, as well as their joint coverage in order to avoid pre-constraining the design space. Given a parallel program and a set of an IP library, the automated synthesis problem is to simultaneously (i) select processors (ii) map and schedule tasks to them, and (iii) select one or several networks for inter-task communications such that design constraints and optimization objectives are met. The research objective in this thesis is to find a suitable model for automated synthesis, and to evaluate methods of using the model for architectural optimizations. Our contributions are a holistic approach for the design of such systems, corresponding models to facilitate automated synthesis, evaluation of optimization methods using state of the art integer linear and answer set programming, as well as the development of synthesis heuristics to solve runtime challenges.}, language = {en} } @article{CsuhajVarjuDassowVaszil2010, author = {Csuhaj-Varj{\´u}, Erzs{\´e}bet and Dassow, Juergen and Vaszil, Gy{\"o}rgy}, title = {Variants of competence-based derivations in CD grammar systems}, issn = {0129-0541}, doi = {10.1142/S0129054110007428}, year = {2010}, abstract = {In this paper we introduce and study some new cooperation protocols for cooperating distributed (CD) grammar systems. These derivation modes depend on the number of different nonterminals present in the sentential form obtained when a component finished a derivation phase. This measure describes the competence of the grammar on the string (the competence is high if the number of the different nonterminals is small). It is also a measure of the efficiency of the grammar on the given string (a component is more efficient than another one if it is able to decrease the number of nonterminals in the string to a greater extent). We prove that if the underlying derivation mode is the t-mode derivation, then some variants of these systems determine the class of random context ET0L languages. If these CD grammar systems use the k step limited derivations as underlying derivation mode, then they are able to generate any recursively enumerable language.}, language = {en} } @article{Alnemr2010, author = {Alnemr, Rehab}, title = {Context-aware Reputation in SOA and future internet}, isbn = {978-3-86956-036-6}, year = {2010}, language = {en} } @article{Hildebrandt2010, author = {Hildebrandt, Dieter}, title = {Towards service-oriented, standards-based, image-based provisioning, interaction with and styling of geovirtual 3D environments}, isbn = {978-3-86956-036-6}, year = {2010}, language = {en} } @article{Polyvyanyy2010, author = {Polyvyanyy, Artem}, title = {Abstraction of process specifications}, isbn = {978-3-86956-036-6}, year = {2010}, language = {en} } @phdthesis{Uflacker2010, author = {Uflacker, Matthias}, title = {Monitoring virtual team collaboration : methods, applications and experiences in engineering design}, address = {Potsdam}, pages = {203 S.}, year = {2010}, language = {en} } @phdthesis{Bleiholder2010, author = {Bleiholder, Jens}, title = {Data fusion and conflict resolution in integrated information systems}, address = {Potsdam}, pages = {171 S.}, year = {2010}, language = {en} } @phdthesis{Cheng2010, author = {Cheng, Feng}, title = {Physical separation technology and its lock-keeper implementation}, address = {Potsdam}, pages = {114 S.}, year = {2010}, language = {en} } @phdthesis{Noll2010, author = {Noll, Michael G.}, title = {Understanding and leveraging the social web for information retrieval}, address = {Potsdam}, pages = {xi, 223 S. : Ill., graph. Darst.}, year = {2010}, language = {en} }