Christoph Schuler, Can Türker, Hans-jörg Schek, Roger Weber, Heiko Schuldt
Abstract: The functionality of applications is increasingly being made available by services. General concepts and standards such as SOAP, WSDL and UDDI support the discovery and invocation of single...
Automated Composition and Reliable Execution of Ad-hoc Processes ⋆ (2008)
Walter Binder, Ion Constantinescu, Boi Faltings, Klaus Haller, Can Türker
Abstract. This paper presents an architecture to automatically create ad-hoc processes for complex value-added services and to execute them in a reliable way. The uniqueness of ad-hoc processes is to...
Martin Breunig, Can Türker, Michael H. Böhlen, Stefan Dieker, Ralf Hartmut Güting, Christian S. Jensen, ...
This chapter is devoted to architectural and implementation aspects of spatiotemporal database management systems. It starts with a general introduction into architectures and commercial approaches...
Ingo Schmitt, Can Türker, Gunter Saake, Ingo Schmitt, Konzepte Sprachen Architekturen, ...
Diese PDF PDF-Version Version ist ausschliesslich zum Selbststudium sowie für den Einsatz in der Lehre bestimmt bestimmt.. Eine andere andere, , insbesondere kommerzielle Verwendung bedarf einer...
Towards Agent-Oriented Specification of Information Systems (2007)
Stefan Conrad, Can Türker, Gunter Saake
Objects in information systems usually have a very long life-span. Therefore, it often happens that during the life of an object external requirements are changing, e.g. changes of laws. Such changes...
06431 Working Group Report on Managing and Integrating Data in P2P Databases (2007)
Boncz, Peter A., Bonifati, Angela, Illarramendi, Arantza, Janacik, Peter, König-Ries, Birgitta, Lehner, Wolfgang, ...
In this report, to our best recollection, we provide a summary of the working group ââ¬ËManaging and Integrating Data in P2P Databasesââ¬â¢ of the Dagstuhl Seminar nr. 6431 on...
Walter Binder, Ion Constantinescu, Boi Faltings, Klaus Haller, Can Türker, I. Constantinescu, ...
A multiagent system for the reliable execution
A Multiagent System for the Reliable Execution of Automatically Composed Ad-hoc Processes (2006)
Walter Binder, Ion Constantinescu, Boi Faltings, Klaus Haller, Can Türker
Abstract. This paper presents an architecture to automatically create ad-hoc processes for complex value-added services and to execute them in a reliable way. The uniqueness of ad-hoc processes is to...
A Multiagent System for the Reliable Execution of Automatically Composed Ad-hoc Processes (2006)
Walter Binder, Ion Constantinescu, Boi Faltings, Klaus Haller, Can Türker
Abstract. This paper presents an architecture to automatically create ad-hoc processes for complex value-added services and to execute them in a reliable way. The uniqueness of ad-hoc processes is to...
04441 Working Group - Research Issues in Mobile Transactions (2005)
Böse, Joos-Hendrik, Böttcher, Stefan, Gruenwald, Le, Pitoura, Evaggelia, Reiher, Peter, Samaras, George, ...
This document discusses three scenarios for databases with mobile clients, summarizes typical applications and requirements for each of the three scenarios, and outlines the open research issues...
How can we support Grid Transactions? Towards Peer-to-Peer Transaction Processing (2005)
Can Türker, Klaus Haller, Christoph Schuler, Hans-jörg Schek
Today, we witness a merger between Web services and grid technology towards an open grid service infrastructure that especially satisfies the demands of complex computations on huge volumes of data....
Fine-Grained Replication and Scheduling with Freshness and Correctness Guarantees (2005)
Fuat Akal, Can Türker, Hans-Jörg Schek, Yuri Breitbart, Torsten Grabs, Lourens Veen
Lazy replication protocols provide good scalability properties by decoupling transaction execution from the propagation of new values to replica sites while guaranteeing a correct and more efficient...
Decentralized coordination of transactional processes in peer-to-peer environments (2005)
Klaus Haller, Heiko Schuldt, Can Türker
Business processes executing in peer-to-peer environments usually invoke Web services on different, independent peers. Although peer-to-peer environments inherently lack global control, some business...
04441 Working Group -- Description and Matching of Services in Mobile Environments (2005)
Grünbauer, Johannes, Klein, Michael, Koloniari, Georgia, Samaras, George, Türker, Can
Service oriented computing is a new paradigm that is especially interesting in mobile environments. As a characteristics, functionality is hidden behind an interface and described as a black box with...
04441 Working Group -- Research Issues in Mobile Transactions (2005)
Böse, Joos-Hendrik, Böttcher, Stefan, Gruenwald, Le, Pitoura, Evaggelia, Reiher, Peter, Samaras, George, ...
This document discusses three scenarios for databases with mobile clients, summarizes typical applications and requirements for each of the three scenarios, and outlines the open research issues...
04441 Executive Summary -- Mobile Information Management (2005)
Dunham, Margaret H., König-Ries, Birgitta, Pitoura, Evaggelia, Reiher, Peter, Türker, Can
From October, 25th until 29th
04441 Abstracts Collection -- Mobile Information Management (2005)
Dunham, Margaret H., König-Ries, Birgitta, Pitoura, Evaggelia, Reiher, Peter, Türker, Can
From 24.10.04 to 29.10.04, the Dagstuhl Seminar 04441 ``Mobile Information Management'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar,...
Towards Collaborative Search in Digital Libraries Using Peer-to-Peer Technology (2005)
Bender, Matthias, Michel, Sebastian, Zimmer, Christian, Weikum, Gerhard, Türker, Can, Agosti, Maristella, ...
We consider the problem of collaborative search across a large number of digital libraries and query routing strategies in a peer-to-peer (P2P) environment. Both digital libraries and users are...
FliX: A Flexible Framework for Indexing Complex XML Document Collections (2004)
Schenkel, Ralf, Lindner, Wolfgang, Mesiti, Marco, Türker, Can, Tzitzikas, Yannis, Vakali, Athena
While there are many proposals for path indexes on XML documents, none of them is perfectly suited for indexing large-scale collections of interlinked XML documents. Existing strategies lack support...
Relevance Feedback in XML Retrieval (2004)
Pan, Hanglin, Lindner, Wolfgang, Mesiti, Marco, Türker, Can, Tzitzikas, Yannis, Vakali, Athena
Highly heterogeneous XML data collections that do not have a global schema, as arising, for example, in federations of digital libraries or scientific data repositories, cannot be effectively queried...
Concept-Based Search on Semi-structured Data Exploiting Mined Semantic Relations (2004)
Graupmann, Jens, Lindner, Wolfgang, Mesiti, Marco, Türker, Can, Tzitzikas, Yannis, Vakali, Athena
What's Next in XML and Databases (2004)
Garofalakis, Minos, Manolescu, Ioana, Mesiti, Marco, Mihaila, George, Schenkel, Ralf, Thuraisingham, Bhavani, ...
Towards Collaborative Search in Digital Libraries Using Peer-to-Peer Technology (2004)
Bender, Matthias, Michel, Sebastian, Zimmer, Christian, Weikum, Gerhard, Agosti, Maristella, Schek, Hans-Jörg, ...
We consider the problem of collaborative search across a large number of digital libraries and query routing strategies in a peer-to-peer (P2P) environment. Both digital libraries and users are...
A Multiagent System for the Reliable Execution of Automatically Composed Ad-hoc Processes (2004)
Binder, Walter, Constantinescu, Ion, Faltings, Boi, Haller, Klaus, Türker, Can
Fine-Grained Lazy Replication with Strict Freshness and Correctness Guarantees (2004)
Fuat Akal, Can Türker, Hans-jörg Schek, Yuri Breitbart, Fuat Akal, Can Türker, ...
Eager replication management is known to generate unacceptable performance as soon as the update rate or the number of replicas increases. Lazy replication protocols tackle this problem by decoupling...
Hyperdatabase Infrastructure for Management and Search of Multimedia Collections (2004)
Michael Mlivoncic, Christoph Schuler, Can Türker
Abstract. Nowadays, digital libraries are inherently dispersed over several peers of a steadily increasing network. Dedicated peers may provide specialized, computationally expensive services such as...
Towards Collaborative Search in Digital Libraries Using Peer-to-Peer Technology (2004)
Bender, Matthias, Michel, Sebastian, Zimmer, Christian, Weikum, Gerhard, Agosti, Maristella, Schek, Hans-Jörg, ...
We consider the problem of collaborative search across a large number of digital libraries and query routing strategies in a peer-to-peer (P2P) environment. Both digital libraries and users are...
What's Next in XML and Databases (2004)
Garofalakis, Minos, Manolescu, Ioana, Mesiti, Marco, Mihaila, George, Schenkel, Ralf, Thuraisingham, Bhavani, ...
Concept-Based Search on Semi-structured Data Exploiting Mined Semantic Relations (2004)
Graupmann, Jens, Lindner, Wolfgang, Mesiti, Marco, Türker, Can, Tzitzikas, Yannis, Vakali, Athena
Relevance Feedback in XML Retrieval (2004)
Pan, Hanglin, Lindner, Wolfgang, Mesiti, Marco, Türker, Can, Tzitzikas, Yannis, Vakali, Athena
Highly heterogeneous XML data collections that do not have a global schema, as arising, for example, in federations of digital libraries or scientific data repositories, cannot be effectively queried...
FliX: A Flexible Framework for Indexing Complex {XML} Document Collections (2004)
Schenkel, Ralf, Lindner, Wolfgang, Mesiti, Marco, Türker, Can, Tzitzikas, Yannis, Vakali, Athena
While there are many proposals for path indexes on XML documents, none of them is perfectly suited for indexing large-scale collections of interlinked XML documents. Existing strategies lack support...
Can Türker, Gabriele Zini, Dr. C. Türker, Can Türker, Gabriele Zini
The need for information access and processing in mobile computing environments presents great challenges to database researchers. Apart from advances in wireless communications and device...
Abstract. The correctness of the data managed by database systems is vital to any application that utilizes data for business, research, and decision-making purposes. To guard databases against...
Extending Transaction Closures by N-ary Termination Dependencies (1998)
Kerstin Schwarz, Can Türker, Gunter Saake
. Transaction dependencies have been recognized as a valuable method in describing restrictions on the executions of sets of transactions. A transaction closure is a generalized transaction structure...
Execution Dependencies in Transaction Closures (1998)
Kerstin Schwarz, Can Türker, Gunter Saake
Activities of advanced applications can be modeled by interrelated transactions. These relations can be described by different kinds of transaction dependencies. The notion of transaction closure is...
Deriving Relationships between Integrity Constraints for Schema Comparison (1998)
. Schema comparison is essential for integrating different database schemata. Since the semantics of a schema is also represented by its integrity constraints, they must be considered by a correct...
Considering Integrity Constraints During Federated Database Design (1998)
Stefan Conrad, Ingo Schmitt, Can Türker
. Correct transformations and integrations of schemata within the process of federated database design have to encompass existing local integrity constraints. Most of the proposed methods for schema...
Analyzing And Formalizing Dependencies In Generalized Transaction Structures (1998)
Kerstin Schwarz, Can Türker, Gunter Saake
Modern information systems require advanced transaction models providing means to describe complex activities such as transactional workflows. Complex activities consist of sets of transactions which...
Transitive Dependencies in Transaction Closures (1998)
Kerstin Schwarz, Can Türker, Gunter Saake
Complex applications consist of a large set of transactions which are interrelated. There are different kinds of dependencies among transactions of a complex application, e.g. termination or...
Schema integration as part of the database design as well as of the database integration process has to deal with extensional relationships among classes of the different schemata to be integrated....
Requirements for Agent-based Modeling of Federated Database Systems (Extended Abstract) (1997)
Can Türker, Gunter Saake, Stefan Conrad
) Can Turker Gunter Saake Stefan Conrad Institut fur Technische Informationssysteme Otto-von-Guericke-Universitat Magdeburg Postfach 4120, D--39016 Magdeburg E-mail:...
Behandlung von Integritätsbedingungen bei Schemarestrukturierung und Schemaintegration (1997)
Stefan Conrad, Ingo Schmitt, Can Türker, Schemarestrukturierung Und Schemaintegration, Restrukturierung Von Schemata
che sehr unterschiedlich. Auch wenn zum Beispiel die Schemarestrukturierung als ein Spezialfall der Sichtableitung aufgefat werden kann, werden in diesen Bereichen doch zumeist unterschiedliche Ziele...
Modeling Database Federations in Terms of Evolving Agents (1997)
Can Türker, Gunter Saake, Stefan Conrad
For advanced information systems, the interoperation between heterogeneous database systems which autonomously manage their existing, independently developed databases is a fundamental issue. Thus,...
Towards an Agent-Oriented Framework for Specification of Information Systems (1997)
Stefan Conrad, Gunter Saake, Can Türker
Objects in information systems usually have a very long life-span. Therefore, it often happens that during the life of an object external requirements are changing, e.g. changes of laws. Such changes...
Schema Integration with Integrity Constraints (1997)
Stefan Conrad, Michael Höding, Gunter Saake, Ingo Schmitt, Can Türker
. In this paper we discuss the use and treatment of integrity constraints in the federated database design process. We consider different situations occurring frequently in the schema transformation...
Using Active Mechanisms for Global Integrity Maintenance in Federated Database Systems (1996)
Federated database systems have special requirements w.r.t. integrity maintenance. For instance, it must be possible to express inter-database dependencies in an adequate language and the federated...
An Approach to Supporting Semantic Integrity of Federated Databases (1996)
In this paper, a very flexible way to realize global integrity enforcement in federated database systems is proposed. By integrating the active rule paradigm into a federated database framework...
Integrity Constraints in Federated Database Design (1996)
Stefan Conrad, Michael Höding, Sven Janssen, Gunter Saake, Ingo Schmitt, Can Türker
In this paper we demonstrate the application of a methodology for federated database design. Federated database design includes the transformation of heterogeneous local schemata from the native data...
Active Integrity Maintenance in Federated Database Systems (1995)
We propose the active database paradigm as a suitable approach to realize global integrity maintenance in tightly coupled federated database systems. It has come to light that there is a need for...
Object-Oriented Database Design: What is the Difference with Relational Database Design? (1995)
Gunter Saake, Stefan Conrad, Ingo Schmitt, Can Türker
Object-oriented database design is not only a simple extension of relational database design. By modelling structure as well as behaviour of real world entities as coherent units, object-oriented...
Dealing With Integrity Constraints During Schema Integration (Extended Abstract)
Stefan Conrad, Ingo Schmitt, Can Türker
1 Introduction At the time being, a large number of methods have been proposed for schema integration, e.g., [SPD92, RPRG94, SS96a, SC97]. Surprisingly, most of them do not consider the integration...