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Displaying 1-27 out of 27 total
Extending BPEL for Run Time Adaptability
Found in: Enterprise Distributed Object Computing Conference, IEEE International
By Dimka Karastoyanova, Alejandro Houspanossian, Mariano Cilia, Frank Leymann, Alejandro Buchmann
Issue Date:September 2005
pp. 15-26
<p>The existing Web Service Flow (WS-flow) technologies enable both static and dynamic binding of participating Web services (WSs) on the process model level. Adaptability on per-instance basis is not sufficiently supported and therefore must be addr...
Towards Multi-Purpose Wireless Sensor Networks
Found in: Wireless Technologies/High Speed Networks/Multimedia Communications Systems/Sensor Networks, International Conference on
By Jan Steffan, Ludger Fiege, Mariano Cilia, Alejandro Buchmann
Issue Date:August 2005
pp. 336-341
<p>Current wireless sensor network (WSN) architectures are based on the assumption that all sensor nodes are participating in a single global task. In many scenarios, however, it will be desirable to use a single sensor network for multiple concurren...
Eventlets: Components for the integration of event streams with SOA
Found in: 2012 5th IEEE International Conference on Service-Oriented Computing and Applications (SOCA)
By Stefan Appel,Sebastian Frischbier,Tobias Freudenreich,Alejandro Buchmann
Issue Date:December 2012
pp. 1-9
Cyber physical systems (CPS) react to changes in the environment and have become widely adopted in many domains. One key functionality to achieve this reactivity is the processing of event streams. To profit from this reactive behavior in service-oriented ...
On the Performance of Database Query Processing Algorithms on Flash Solid State Disks
Found in: Database and Expert Systems Applications, International Workshop on
By Daniel Bausch,Ilia Petrov,Alejandro Buchmann
Issue Date:September 2011
pp. 139-144
Flash Solid State Disks induce a drastic change in storage technology that impacts database systems. Flash memories exhibit low latency (especially for small block sizes), very high random read and low random write throughput, and significant asymmetry bet...
Towards a Common Interface for Overlay Network Simulators
Found in: Parallel and Distributed Systems, International Conference on
By Christian Groß, Max Lehn, Dominik Stingl, Aleksandra Kovacevic, Alejandro Buchmann, Ralf Steinmetz
Issue Date:December 2010
pp. 59-66
Simulation has become an important evaluation method in the area of Peer-to-Peer (P2P) research due to the scalability limitations of evaluation test beds such as Planet Lab or G-Lab. Current simulators provide various abstraction levels for different unde...
Surviving the Data Glut: The Management of Events Streams in Cyberphysical Systems
Found in: Mexican International Conference on Computer Science
By Alejandro Buchmann
Issue Date:October 2008
pp. 4
No summary available.
A3ME - An Agent-Based Middleware Approach for Mixed Mode Environments
Found in: Mobile Ubiquitous Computing, Systems, Services and Technologies, International Conference on
By Arthur Herzog, Daniel Jacobi, Alejandro Buchmann
Issue Date:October 2008
pp. 191-196
In this paper we introduce a new agent-based approach for middleware in mixed mode environments. Mixed mode environments have different dimensions of heterogeneity: devices with widely differing capabilities, different software, and different communication...
pSense - Maintaining a Dynamic Localized Peer-to-Peer Structure for Position Based Multicast in Games
Found in: Peer-to-Peer Computing, IEEE International Conference on
By Arne Schmieg, Michael Stieler, Sebastian Jeckel, Patric Kabus, Bettina Kemme, Alejandro Buchmann
Issue Date:September 2008
pp. 247-256
This paper presents an algorithm for creating and maintaining a dynamic localized peer-to-peer overlay network with its main application to massively multiplayer games. In these games, players reside in a large game world with many thousands of players but...
ICDE 2008 General Chairs Message
Found in: 2008 IEEE 24th International Conference on Data Engineering (ICDE '08)
By Malu Castellanos,Alejandro Buchmann,Krithi Ramamritham
Issue Date:April 2008
pp. nil135
No summary available.
Pushing Business Data Processing Towards the Periphery
Found in: Data Engineering, International Conference on
By Pablo Guerrero, Kai Sachs, Mariano Cilia, Christof Bornhovd, Alejandro Buchmann
Issue Date:April 2007
pp. 1485-1486
The usage of RFID and sensing technologies in Supply Chain Management applications requires the automatic conversion of large amounts of raw data into manageable business process information. This has led to many performance and scalability issues in exist...
QPME - Queueing Petri Net Modeling Environment
Found in: Quantitative Evaluation of Systems, International Conference on
By Samuel Kounev, Christofer Dutz, Alejandro Buchmann
Issue Date:September 2006
pp. 115-116
Queueing Petri nets are a powerful formalism that can be exploited for modeling distributed systems and analyzing their performance and scalability. However, currently available tools for modeling and analysis using queueing Petri nets are very limited in ...
Publish-Subscribe Grows Up: Support for Management, Visibility Control, and Heterogeneity
Found in: IEEE Internet Computing
By Ludger Fiege, Mariano Cilia, Gero Mühl, Alejandro Buchmann
Issue Date:January 2006
pp. 48-55
Message-oriented middleware is used to decouple the operation of cooperating applications. Existing approaches have concentrated mainly on scalability issues, but dynamic business processes and the integration of a wide range of data sources and applicatio...
Evaluating and Selecting Web Sources as External Information Resources of a Data Warehouse
Found in: Web Information Systems Engineering, International Conference on
By Yan Zhu, Alejandro Buchmann
Issue Date:December 2002
pp. 149
A company?s local data often is not sufficient to analyze market trends and make reasonable business plans. Decision making must also be based on information from suppliers, partners and competitors. Systematically integrating suitable external data from t...
Using Multiple Mobile Agents for Distributed Transactions
Found in: Cooperative Information Systems, IFCIS International Conference on
By Hartmut Vogler, Alejandro Buchmann
Issue Date:August 1998
pp. 114
Agent systems are well suited for applications requiring great flexibility. In this paper we propose a mechanism that uses multiple mobile agents to implement distributed transactions in a wide area network. Of special interest are applications in which re...
Distributed optimization of event dissemination exploiting interest clustering
Found in: 2013 IEEE 38th Conference on Local Computer Networks (LCN 2013)
By Max Lehn,Robert Rehner,Alejandro Buchmann
Issue Date:October 2013
pp. 328-331
In distributed real-time applications, such as online games or interactive conferencing systems, timeliness of update event dissemination is a prevailing requirement. Direct connections are often the best solution. However, participants' connection bandwid...
Read optimisations for append storage on flash
Found in: Proceedings of the 17th International Database Engineering & Applications Symposium (IDEAS '13)
By Alejandro Buchmann, Robert Gottstein, Ilia Petrov
Issue Date:October 2013
pp. 106-113
Append-/Log-based Storage Managers (LbSM) for database systems represent a good match for the characteristics and behaviour of Flash technology. LbSM alleviate random writes reducing the impact of Flash read/write asymmetry, increasing endurance and perfor...
Wireless sensor networks in the wild: three practical issues after a middleware deployment
Found in: Proceedings of the 6th International Workshop on Middleware Tools, Services and Run-time Support for Networked Embedded Systems (MidSens '11)
By Alejandro Buchmann, Christian Seeger, Kristof Van Laerhoven
Issue Date:December 2011
pp. 1-6
This paper reflects on experiences in deploying middleware for a body sensor network, using commercial biosensors. Three types of issues are highlighted that arose during the deployment, which impact middleware design in particular: 1) How can the architec...
An online gaming testbed for peer-to-peer architectures
Found in: Proceedings of the ACM SIGCOMM 2011 conference on SIGCOMM (SIGCOMM '11)
By Alejandro Buchmann, Christof Leng, Max Lehn, Robert Rehner, Tonio Triebel
Issue Date:August 2011
pp. 474-475
In this demo we present a testbed environment for Peer-to-Peer (P2P) game architectures. It is based on Planet PI4, an online multiplayer game whose gameplay provides a standard workload for a set of gaming-specific network interfaces. Its pluggable archit...
Designing a testbed for large-scale distributed systems
Found in: Proceedings of the ACM SIGCOMM 2011 conference on SIGCOMM (SIGCOMM '11)
By Alejandro Buchmann, Christof Leng, Max Lehn, Robert Rehner
Issue Date:August 2011
pp. 400-401
Different evaluation methods for distributed systems like prototyping, simulation and emulation have different tradeoffs. We present a testbed for Internet applications that supports real-network prototypes and multiple simulators with unchanged applicatio...
Towards benchmarking of AMQP
Found in: Proceedings of the Fourth ACM International Conference on Distributed Event-Based Systems (DEBS '10)
By Alejandro Buchmann, Kai Sachs, Stefan Appel
Issue Date:July 2010
pp. 99-100
With the increasing importance of event-based systems the performance of underlying event transporting systems, such as message oriented middleware (MOM), becomes business critical. Therefore, we see a strong need for benchmarks for such environments. Seve...
Whac-A-Bee: a sensor network game
Found in: Proceedings of the 7th ACM Conference on Embedded Networked Sensor Systems (SenSys '09)
By Alejandro Buchmann, Arthur Herzog, Bernt Schiele, Daniel Jacobi, Eugen Berlin, Kristof Van Laerhoven, Pablo Guerrero
Issue Date:November 2009
pp. 333-334
This paper illustrates both challenges and benefits found in expanding a traditional game concept to a situated environment with a distributed set of wireless sensing modules. Our pervasive game equivalent of the Whac-A-Mole game, Whac-A-Bee, retains the f...
Benchmarking of message-oriented middleware
Found in: Proceedings of the Third ACM International Conference on Distributed Event-Based Systems (DEBS '09)
By Alejandro Buchmann, Kai Sachs, Samuel Kounev, Stefan Appel
Issue Date:July 2009
pp. 1-2
Message-oriented middleware (MOM) is increasingly used as enabling technology for modern event-driven applications typically based on publish/subscribe (pub/sub) communication [1]. Many of these applications are designed for maximum scalability and flexibi...
Event-based applications and enabling technologies
Found in: Proceedings of the Third ACM International Conference on Distributed Event-Based Systems (DEBS '09)
By Alejandro Buchmann, Annika Hinze, Kai Sachs
Issue Date:July 2009
pp. 1-15
Event processing has become the paradigm of choice in many monitoring and reactive applications. However, the understanding of events, their composition and level of abstraction, the style of processing and the quality of service requirements vary drastica...
Area-based gossip multicast
Found in: Proceedings of the 7th ACM SIGCOMM Workshop on Network and System Support for Games (NetGames '08)
By Alejandro Buchmann, Bettina Kemme, Christian Seeger, Patric Kabus
Issue Date:October 2008
pp. 1-6
This paper presents areacast, a dynamic, area-based gossip multicast that enables a node to multicast messages only to nodes with a shared interest. This multicast can be used in multiplayer games where players want to send position updates, that is inform...
Workflow support for wireless sensor and actor networks: a position paper
Found in: Proceedings of the 4th workshop on Data management for sensor networks: in conjunction with 33rd International Conference on Very Large Data Bases (DMSN '07)
By Alejandro Buchmann, Daniel Jacobi, Pablo Ezequiel Guerrero
Issue Date:September 2007
pp. 31-36
As initial challenges of wireless sensor and actor networks (WSANs) are overcome, their application possibilities evolve. For these applications to move mainstream, efficient programming methods are required which can be used by domain experts. So far, the...
A practical approach for enabling online analysis of event streams
Found in: Proceedings of the 2007 inaugural international conference on Distributed event-based systems (DEBS '07)
By Alejandro Buchmann, Mariano Cilia, Sebastian Salvucci
Issue Date:June 2007
pp. 158-163
The event-based paradigm has gained interest as a solution for integrating large-scale distributed and loosely coupled systems. It also has been propelled by the growth of event-based applications like ambient intelligence, utility monitoring, event-driven...
Scoping in wireless sensor networks: a position paper
Found in: Proceedings of the 2nd workshop on Middleware for pervasive and ad-hoc computing
By Alejandro Buchmann, Jan Steffan, Ludger Fiege, Mariano Cilia
Issue Date:October 2004
pp. 167-171
One of the trends of wireless sensor networks (WSN) is to allow multiple applications to run on top of the same sensor network. This will have an enormous impact on the way WSN applications are developed, deployed and maintained. Many applications for WSN ...