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2017

Holzmann, H. & Risse, T.
Accessing web archives from different perspectives with potential synergies
Researchers, practitioners and their use of the archived web (London, 2017), , 2017
Abstract: Web archives constitute a valuable source for researchers from many disciplines. However, their sheer size, the typically broad scope and their temporal dimension make them difficult to work with. We have identified three approaches to access and explore Web archives from different perspectives: user-, data- and graph-centric. In this paper we present related works on these three views as well as discuss their relations and potential synergies. Finally, we propose a generic analysis schema that outlines a systematic way to study Web archives by approaching them from different zoom levels corresponding to the three presented views.
BibTeX:
@inproceedings{holzmann2017accessing,
  author = {Holzmann, Helge and Risse, Thomas},
  title = {Accessing web archives from different perspectives with potential synergies},
  booktitle = {Researchers, practitioners and their use of the archived web (London, 2017)},
  year = {2017},
  url = {http://archivedweb.blogs.sas.ac.uk/files/2017/06/RESAW2017-HolzmannRisse-Accessing_web_archives_from_different_perspectives_with_potential_synergies.pdf},
  doi = {10.14296/resaw.0001}
}

2016


Fuhr, N.; Kovács, Lá.; Risse, T. & Nejdl, W. (Eds.)
Research and Advanced Technology for Digital Libraries - 20th International
Conference on Theory and Practice of Digital Libraries, TPDL 2016,
Hannover, Germany, September 5-9, 2016, Proceedings

Springer , Vol. 9819, 2016
BibTeX:
@proceedings{DBLP:conf/ercimdl/2016,,
  editor = {Fuhr, Norbert and Kovács, László and Risse, Thomas and Nejdl, Wolfgang},
  title = {Research and Advanced Technology for Digital Libraries - 20th International
Conference on Theory and Practice of Digital Libraries, TPDL 2016,
Hannover, Germany, September 5-9, 2016, Proceedings}, publisher = {Springer}, year = {2016}, volume = {9819}, url = {http://dx.doi.org/10.1007/978-3-319-43997-6}, doi = {10.1007/978-3-319-43997-6} }
Gossen, G.; Demidova, E. & Risse, T.
Analyzing Web Archives Through Topic and Event Focused Sub-collections
Proceedings of the 8th ACM Conference on Web Science, ACM , 291-295, 2016
Abstract: Web archives capture the history of the Web and are therefore an important source to study how societal developments have been reflected on the Web. However, the large size of Web archives and their temporal nature pose many challenges to researchers interested in working with these collections. In this work, we describe the challenges of working with Web archives and propose the research methodology of extracting and studying sub-collections of the archive focused on specific topics and events. We discuss the opportunities and challenges of this approach and suggest a framework for creating sub-collections.
BibTeX:
@inproceedings{Gossen:2016:AWA:2908131.2908175,
  author = {Gossen, Gerhard and Demidova, Elena and Risse, Thomas},
  title = {Analyzing Web Archives Through Topic and Event Focused Sub-collections},
  booktitle = {Proceedings of the 8th ACM Conference on Web Science},
  publisher = {ACM},
  year = {2016},
  pages = {291--295},
  url = {https://arxiv.org/abs/1612.05413},
  doi = {10.1145/2908131.2908175}
}

2015

Risse, T.; Predoiu, L.; Mitschick, A.; Nürnberger, A. & Ross, S.
Focussed issue on Semantic Digital Archives
Int. J. on Digital Libraries, , Vol. 15, 2015
BibTeX:
@periodical{2015focussed,
  author = {Risse, Thomas and Predoiu, Livia and Mitschick, Annett and Nürnberger, Andreas and Ross, Seamus},
  title = {Focussed issue on Semantic Digital Archives},
  journal = {Int. J. on Digital Libraries},
  year = {2015},
  volume = {15},
  number = {2-4}
}
Demidova, E.; Risse, T. & Tran, G. B.
Entity-Centric Preservation for Linked Open Data: Use Cases, Requirements and Models
Proc.of 5th International Workshop on Semantic Digital Archives (SDA 2015), ceur-ws.org , 61 - 75, 2015
Abstract: Linked Open Data (LOD) plays an increasingly important role in the area of digital libraries and archives. It enables better semantic-based access methods and also gives the human reader more insights into linked entities. Since semantics is evolving over time, the temporal dimension has an increasing impact on the applicability of LOD to long-term archives. LOD does not necessarily provide a history. Therefore it is not possible to go back in time and access the document related LOD content at the time of the document creation. In this paper we propose to collect LOD information along with the Web content for Web archives to also ensure a good semantic coverage of aWeb crawl.We discuss use cases and requirements and derive the general approach and related data models for the implementation.
BibTeX:
@inproceedings{demidova2015entitycentric,
  author = {Demidova, Elena and Risse, Thomas and Tran, Giang Binh},
  title = {Entity-Centric Preservation for Linked Open Data: Use Cases, Requirements and Models},
  booktitle = {Proc.of 5th International Workshop on Semantic Digital Archives (SDA 2015)},
  publisher = {ceur-ws.org},
  year = {2015},
  number = {1529},
  pages = {61 - 75},
  url = {http://ceur-ws.org/Vol-1529/}
}
Gossen, G.; Demidova, E. & Risse, T.
The iCrawl Wizard - Supporting Interactive Focused Crawl Specification
Advances in Information Retrieval: 37th European Conference on IR Research, ECIR 2015, Vienna, Austria, March 29 - April 2, 2015., Springer International Publishing , 797-800, 2015
Abstract: Collections of Web documents about specific topics are needed for many areas of current research. Focused crawling enables the creation of such collections on demand. Current focused crawlers require the user to manually specify starting points for the crawl (seed URLs). These are also used to describe the expected topic of the collection. The choice of seed URLs influences the quality of the resulting collection and requires a lot of expertise. In this demonstration we present the iCrawl Wizard, a tool that assists users in defining focused crawls efficiently and semi-automatically. Our tool uses major search engines and Social Media APIs as well as information extraction techniques to find seed URLs and a semantic description of the crawl intent. Using the iCrawl Wizard even non-expert users can create semantic specifications for focused crawlers interactively and efficiently.
BibTeX:
@inproceedings{gerhardgossen2015icrawl,
  author = {Gossen, Gerhard and Demidova, Elena and Risse, Thomas},
  title = {The iCrawl Wizard - Supporting Interactive Focused Crawl Specification},
  booktitle = {Advances in Information Retrieval: 37th European Conference on IR Research, ECIR 2015, Vienna, Austria, March 29 - April 2, 2015.},
  publisher = {Springer International Publishing},
  year = {2015},
  pages = {797--800},
  url = {http://link.springer.com/chapter/10.1007/978-3-319-16354-3_88},
  doi = {10.1007/978-3-319-16354-3_88}
}
Gossen, G.; Demidova, E. & Risse, T.
iCrawl: Improving the Freshness of Web Collections by Integrating Social Web and Focused Web Crawling
Proceedings of the 15th ACM/IEEE-CS Joint Conference on Digital Libraries, ACM , 75-84, 2015
Abstract: Researchers in the Digital Humanities and journalists need to monitor, collect and analyze fresh online content regarding current events such as the Ebola outbreak or the Ukraine crisis on demand. However, existing focused crawling approaches only consider topical aspects while ignoring temporal aspects and therefore cannot achieve thematically coherent and fresh Web collections. Especially Social Media provide a rich source of fresh content, which is not used by state-of-the-art focused crawlers. In this paper we address the issues of enabling the collection of fresh and relevant Web and Social Web content for a topic of interest through seamless integration of Web and Social Media in a novel integrated focused crawler. The crawler collects Web and Social Media content in a single system and exploits the stream of fresh Social Media content for guiding the crawler.
BibTeX:
@inproceedings{Gossen:2015:IIF:2756406.2756925,
  author = {Gossen, Gerhard and Demidova, Elena and Risse, Thomas},
  title = {iCrawl: Improving the Freshness of Web Collections by Integrating Social Web and Focused Web Crawling},
  booktitle = {Proceedings of the 15th ACM/IEEE-CS Joint Conference on Digital Libraries},
  publisher = {ACM},
  year = {2015},
  pages = {75--84},
  url = {http://doi.acm.org/10.1145/2756406.2756925},
  doi = {10.1145/2756406.2756925}
}
Gossen, G.; Demidova, E. & Risse, T.
The iCrawl System for Focused and Integrated Web Archive Crawling
Bulletin of IEEE Technical Committee on Digital Libraries, , Vol. 11, 2015
Abstract: The large size of the Web makes it infeasible for many institutions to collect, store and process archives of the entire Web. Instead, many institutions focus on creating archives of specific subsets of the Web. These subsets may be based around specific topics or events. Our iCrawl system provides a focused crawler that is able to automatically collect Web pages relevant to a topic based on content similarity. Recently, the archiving of Social Media platforms like Twitter has become relevant. Our system can conduct integrated crawls that collect Web pages and Social Media posts concurrently. During such a crawl newly discovered URLs are exchanged between the crawling subsystems. We built the system with the goal to enable domain experts to create archives for their topics of interest. Therefore the system is highly automated and provides support for specifying and conducting crawls. We will demonstrate an easy to use interface for crawl specification that allows users to find seed URLs as well as descriptive keywords using Web and Social Media search APIs. The iCrawl system is available as Open Source software.
BibTeX:
@article{gossen2015icrawl,
  author = {Gossen, Gerhard and Demidova, Elena and Risse, Thomas},
  title = {The iCrawl System for Focused and Integrated Web Archive Crawling},
  journal = {Bulletin of IEEE Technical Committee on Digital Libraries},
  year = {2015},
  volume = {11},
  number = {2},
  url = {http://www.ieee-tcdl.org/Bulletin/v11n2/papers/gossen.pdf}
}
Risse, T. & Nejdl, W.
Herausforderungen für die nationale, regionale und thematische Webarchivierung und deren Nutzung
Zeitschrift für Bibliothekswesen und Bibliographie, Vittorio Klostermann GMBH , Vol. 62, 160-171, 2015
Abstract: Das World Wide Web ist als weltweites Informations- und Kommunikationsmedium etabliert. Neue Technologien erweitern regelmäßig die Nutzungsformen und erlauben es auch unerfahrenen Nutzern, Inhalte zu publizieren oder an Diskussionen teilzunehmen. Daher wird das Web auch als eine gute Dokumentation der heutigen Gesellschaft angesehen. Aufgrund seiner Dynamik sind die Inhalte des Web vergänglich und neue Technologien und Nutzungsformen stellen regelmässig neue Herausforderungen an die Sammlung von Webinhalten für die Webarchivierung. Dominierten in den Anfangstagen der Webarchivierung noch statische Seiten, so hat man es heute häufig mit dynamisch generierten Inhalten zu tun, die Informationen aus verschiedenen Quellen integrieren. Neben dem klassischen domainorientieren Webharvesting kann auch ein steigendes Interesse aus verschiedenen Forschungsdisziplinen an thematischen Webkollektionen und deren Nutzung und Exploration beobachtet werden. In diesem Artikel werden einige Herausforderungen und Lösungsansätze für die Sammlung von thematischen und dynamischen Inhalten aus dem Web und den sozialen Medien vorgestellt. Des Weiteren werden aktuelle Probleme der wissenschaftlichen Nutzung diskutiert und gezeigt, wie Webarchive und andere temporale Kollektionen besser durchsucht werden können.

The World Wide Web is well established as a global information and communication medium. New technologies regularly come along which expand the forms of use and permit even inexperienced users to publish content or take part in discussions. For this reason the Web can also be seen as a good documenter of present- day society. The dynamism of the Web means that its content is, by its very nature, transitory, and new technologies and forms of use regularly present new challenges for the collection of web content for web archiving. Static pages still dominated in the early days of web archiving, whereas many dynamic types of content have now arisen which integrate information from different sources. There is now growing interest from various research disciplines in conventional domain-oriented web harvesting, in thematic web collections and in their use and exploration. This article examines a number of challenges and possible methods of collecting thematic and dynamic content from the Web and social media. Current problems which have arisen in academic use are discussed, and it is shown how web archives and other temporal collections can be searched more effectively.

BibTeX:
@article{Nejdl_2015,
  author = {Risse, Thomas and Nejdl, Wolfgang},
  title = {Herausforderungen für die nationale, regionale und thematische Webarchivierung und deren Nutzung},
  journal = {Zeitschrift für Bibliothekswesen und Bibliographie},
  publisher = {Vittorio Klostermann GMBH},
  year = {2015},
  volume = {62},
  number = {3-4},
  pages = {160--171},
  url = {http://dx.doi.org/10.3196/1864295015623444},
  doi = {10.3196/1864295015623444}
}
Souza, T.; Demidova, E.; Risse, T.; Holzmann, H.; Gossen, G. & Szymanski, J.
Cardoso, J.; Guerra, F.; Houben, G.-J.; Pinto, A. M. & Velegrakis, Y. (Eds.)
Semantic URL Analytics to Support Efficient Annotation of Large Scale Web Archives
Semantic Keyword-based Search on Structured Data Sources, Springer International Publishing , Vol. 9398, 153-166, 2015
Abstract: Long-term Web archives comprise Web documents gathered over longer time periods and can easily reach hundreds of terabytes in size. Semantic annotations such as named entities can facilitate intelligent access to the Web archive data. However, the annotation of the entire archive content on this scale is often infeasible. The most efficient way to access the documents within Web archives is provided through their URLs, which are typically stored in dedicated index files. The URLs of the archived Web documents can contain semantic information and can offer an efficient way to obtain initial semantic annotations for the archived documents. In this paper, we analyse the applicability of semantic analysis techniques such as named entity extraction to the URLs in a Web archive. We evaluate the precision of the named entity extraction from the URLs in the GermanWeb dataset and analyse the proportion of the archived URLs from 1,444 popular domains in the time interval from 2000 to 2012 to which these techniques are applicable. Our results demonstrate that named entity recognition can be successfully applied to a large number of URLs in our Web archive and provide a good starting point to efficiently annotate large scale collections of Web documents.
BibTeX:
@incollection{noKey,
  author = {Souza, Tarcisio and Demidova, Elena and Risse, Thomas and Holzmann, Helge and Gossen, Gerhard and Szymanski, Julian},
  editor = {Cardoso, Jorge and Guerra, Francesco and Houben, Geert-Jan and Pinto, Alexandre Miguel and Velegrakis, Yannis},
  title = {Semantic URL Analytics to Support Efficient Annotation of Large Scale Web Archives},
  booktitle = {Semantic Keyword-based Search on Structured Data Sources},
  publisher = {Springer International Publishing},
  year = {2015},
  volume = {9398},
  pages = {153-166},
  url = {http://dx.doi.org/10.1007/978-3-319-27932-9_14},
  doi = {10.1007/978-3-319-27932-9_14}
}
Holzmann, H.; Tahmasebi, N. & Risse, T.
Named entity evolution recognition on the Blogosphere
International Journal on Digital Libraries, Springer Berlin Heidelberg , Vol. 15, 209-235, 2015
Abstract: Advancements in technology and culture lead to changes in our language. These changes create a gap between the language known by users and the language stored in digital archives. It affects user’s possibility to firstly find content and secondly interpret that content. In a previous work, we introduced our approach for named entity evolution recognition (NEER) in newspaper collections. Lately, increasing efforts in Web preservation have led to increased availability of Web archives covering longer time spans. However, language on the Web is more dynamic than in traditional media and many of the basic assumptions from the newspaper domain do not hold for Web data. In this paper we discuss the limitations of existing methodology for NEER. We approach these by adapting an existing NEER method to work on noisy data like the Web and the Blogosphere in particular. We develop novel filters that reduce the noise and make use of Semantic Web resources to obtain more information about terms. Our evaluation shows the potentials of the proposed approach.
BibTeX:
@article{noKey,
  author = {Holzmann, Helge and Tahmasebi, Nina and Risse, Thomas},
  title = {Named entity evolution recognition on the Blogosphere},
  journal = {International Journal on Digital Libraries},
  publisher = {Springer Berlin Heidelberg},
  year = {2015},
  volume = {15},
  number = {2-4},
  pages = {209-235},
  url = {http://dx.doi.org/10.1007/s00799-014-0135-x},
  doi = {10.1007/s00799-014-0135-x}
}
Risse, T.; Predoiu, L.; Mitschick, A.; Nürnberger, A. & Ross, S.
Introduction to the focussed issue on Semantic Digital Archives
International Journal on Digital Libraries, Springer Berlin Heidelberg , Vol. 15, 71-72, 2015
Abstract: Preservation and curation of digital materials is a significant contemporary cultural, economic and social issue, yet it is often neglected. For decades, the amount of content created digitally has grown dramatically and more recently exponentially as digital process have become core aspects of everyday business and life. Indeed, the complete life cycle of most information nowadays tends to remains digital. A selection of this content is expected to be of value for the future and can thus be considered being part of our cultural heritage and essential as evidence for accountability over time. As soon as these digital materials, whether they be publications, data sets, or records of transactions, become obsolete, but are still deemed to be of value in the future, they have to be transferred smoothly into appropriate archival information systems (AIS) where they can be kept accessible against a backdrop of changing technologies, information practices, and documentation standards.
BibTeX:
@article{risse2015introduction,
  author = {Risse, Thomas and Predoiu, Livia and Mitschick, Annett and Nürnberger, Andreas and Ross, Seamus},
  title = {Introduction to the focussed issue on Semantic Digital Archives},
  journal = {International Journal on Digital Libraries},
  publisher = {Springer Berlin Heidelberg},
  year = {2015},
  volume = {15},
  number = {2-4},
  pages = {71-72},
  url = {http://dx.doi.org/10.1007/s00799-015-0148-0},
  doi = {10.1007/s00799-015-0148-0}
}

Risse, T.; Predoiu, L.; Nürnberger, A. & Ross, S. (Eds.)
Proceedings of the 5th International Workshop on Semantic Digital Archives
CEUR-WS.org , Vol. 1529, 2015
BibTeX:
@proceedings{risse2015proceedings,,
  editor = {Risse, Thomas and Predoiu, Livia and Nürnberger, Andreas and Ross, Seamus},
  title = {Proceedings of the 5th International Workshop on Semantic Digital Archives},
  publisher = {CEUR-WS.org},
  year = {2015},
  volume = {1529},
  url = {http://ceur-ws.org/Vol-1529/}
}
Tahmasebi, N.; Borin, L.; Capannini, G.; Dubhashi, D.; Exner, P.; Forsberg, M.; Gossen, G.; Johansson, F.; Johansson, R.; Kågebäck, M.; Mogren, O.; Nugues, P. & Risse, T.
Visions and open challenges for a knowledge-based culturomics
International Journal on Digital Libraries, Springer Berlin Heidelberg , Vol. 15, 169-187, 2015
Abstract: The concept of culturomics was born out of the availability of massive amounts of textual data and the interest to make sense of cultural and language phenomena over time. Thus far however, culturomics has only made use of, and shown the great potential of, statistical methods. In this paper, we present a vision for a knowledge-based culturomics that complements traditional culturomics. We discuss the possibilities and challenges of combining knowledge-based methods with statistical methods and address major challenges that arise due to the nature of the data; diversity of sources, changes in language over time as well as temporal dynamics of information in general. We address all layers needed for knowledge-based culturomics, from natural language processing and relations to summaries and opinions.
BibTeX:
@article{tahmasebi2015visions,
  author = {Tahmasebi, Nina and Borin, Lars and Capannini, Gabriele and Dubhashi, Devdatt and Exner, Peter and Forsberg, Markus and Gossen, Gerhard and Johansson, FredrikD. and Johansson, Richard and Kågebäck, Mikael and Mogren, Olof and Nugues, Pierre and Risse, Thomas},
  title = {Visions and open challenges for a knowledge-based culturomics},
  journal = {International Journal on Digital Libraries},
  publisher = {Springer Berlin Heidelberg},
  year = {2015},
  volume = {15},
  number = {2-4},
  pages = {169-187},
  url = {http://dx.doi.org/10.1007/s00799-015-0139-1},
  doi = {10.1007/s00799-015-0139-1}
}

2014

Fenzi, M.; Mentzer, N.; Paya-Vaya, G.; Nguyen, T. N.; Risse, T.; Blume, H. & Ostermann, J.
ASEV - Automatic Situation Assessment for Event-driven Video Analysis
11th IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS 2014), Seoul, South Korea, IEEE , 37-43, 2014
Abstract: Many complex operations involving aircraft, vehicles and persons are carried out at outdoor airport premises. Video surveillance is used for safety and security purposes, but manual monitoring is inefficient and privacy protection must be guaranteed. In this paper, we propose a system named ASEV that automatically assesses situations for airport surveillance. It combines four main components: a low-level image processing unit based on a new hardware implementation to extract features in real time, a high-level image processing unit for scene analysis, a real-time inference engine for scene understanding, and a data protection stage for log encryption. In addition, four often neglected aspects are successfully addressed: two-way communication between system and operator, power consumption, monitored people privacy and operator activity control. Extensive evaluation at a real airport shows that the proposed system improves the operator performance with sound and visual alerts based on the automatic assessment of a large set of different events.
BibTeX:
@inproceedings{fenzi2014automatic,
  author = {Fenzi, Michele and Mentzer, Nico and Paya-Vaya, Guillermo and Nguyen, Tu Ngoc and Risse, Thomas and Blume, Holger and Ostermann, Jörn},
  title = {ASEV - Automatic Situation Assessment for Event-driven Video Analysis},
  booktitle = {11th IEEE International Conference on Advanced Video and Signal Based Surveillance (AVSS 2014), Seoul, South Korea},
  publisher = {IEEE},
  year = {2014},
  pages = {37-43},
  url = {http://dx.doi.org/10.1109/AVSS.2014.6918641},
  doi = {10.1109/AVSS.2014.6918641}
}
Demidova, E.; Barbieri, N.; Dietze, S.; Funk, A.; Holzmann, H.; Maynard, D.; Papailiou, N.; Peters, W.; Risse, T. & Spiliotopoulos, D.
Thomas Risse, W. P. (Ed.)
Analysing and Enriching Focused Semantic Web Archives for Parliament Applications
Future Internet, , Vol. 6, 433-456, 2014
Abstract: The web and the social web play an increasingly important role as an information source for Members of Parliament and their assistants, journalists, political analysts and researchers. It provides important and crucial background information, like reactions to political events and comments made by the general public. The case study presented in this paper is driven by two European parliaments (the Greek and the Austrian parliament) and targets an effective exploration of political web archives. In this paper, we describe semantic technologies deployed to ease the exploration of the archived web and social web content and present evaluation results.
BibTeX:
@article{fi6030433,
  author = {Demidova, Elena and Barbieri, Nicola and Dietze, Stefan and Funk, Adam and Holzmann, Helge and Maynard, Diana and Papailiou, Nikolaos and Peters, Wim and Risse, Thomas and Spiliotopoulos, Dimitris},
  editor = {Thomas Risse, Wim Peters},
  title = {Analysing and Enriching Focused Semantic Web Archives for Parliament Applications},
  journal = {Future Internet},
  year = {2014},
  volume = {6},
  number = {3},
  pages = {433--456},
  url = {http://www.mdpi.com/1999-5903/6/3/433},
  doi = {10.3390/fi6030433}
}
Plachouras, V.; Carpentier, F.; Faheem, M.; Masanès, J.; Risse, T.; Senellart, P.; Siehndel, P. & Stavrakas, Y.
ARCOMEM Crawling Architecture
Future Internet, , Vol. 6, 518-541, 2014
Abstract: The World Wide Web is the largest information repository available today. However, this information is very volatile and Web archiving is essential to preserve it for the future. Existing approaches to Web archiving are based on simple definitions of the scope of Web pages to crawl and are limited to basic interactions with Web servers. The aim of the ARCOMEM project is to overcome these limitations and to provide flexible, adaptive and intelligent content acquisition, relying on social media to create topical Web archives. In this article, we focus on ARCOMEM’s crawling architecture. We introduce the overall architecture and we describe its modules, such as the online analysis module, which computes a priority for the Web pages to be crawled, and the Application-Aware Helper which takes into account the type of Web sites and applications to extract structure from crawled content. We also describe a large-scale distributed crawler that has been developed, as well as the modifications we have implemented to adapt Heritrix, an open source crawler, to the needs of the project. Our experimental results from real crawls show that ARCOMEM’s crawling architecture is effective in acquiring focused information about a topic and leveraging the information from social media.
BibTeX:
@article{fi6030518,
  author = {Plachouras, Vassilis and Carpentier, Florent and Faheem, Muhammad and Masanès, Julien and Risse, Thomas and Senellart, Pierre and Siehndel, Patrick and Stavrakas, Yannis},
  title = {ARCOMEM Crawling Architecture},
  journal = {Future Internet},
  year = {2014},
  volume = {6},
  number = {3},
  pages = {518--541},
  url = {http://www.mdpi.com/1999-5903/6/3/518},
  doi = {10.3390/fi6030518}
}
Risse, T.; Demidova, E.; Dietze, S.; Peters, W.; Papailiou, N.; Doka, K.; Stavrakas, Y.; Plachouras, V.; Senellart, P.; Carpentier, F.; Mantrach, A.; Cautis, B.; Siehndel, P. & Spiliotopoulos, D.
The ARCOMEM Architecture for Social- and Semantic-Driven Web Archiving
Future Internet, , Vol. 6, 688-716, 2014
Abstract: The constantly growing amount ofWeb content and the success of the SocialWeb lead to increasing needs for Web archiving. These needs go beyond the pure preservationo of Web pages. Web archives are turning into “community memories” that aim at building a better understanding of the public view on, e.g., celebrities, court decisions and other events. Due to the size of the Web, the traditional “collect-all” strategy is in many cases not the best method to build Web archives. In this paper, we present the ARCOMEM (From Future Internet 2014, 6 689 Collect-All Archives to Community Memories) architecture and implementation that uses semantic information, such as entities, topics and events, complemented with information from the Social Web to guide a novel Web crawler. The resulting archives are automatically enriched with semantic meta-information to ease the access and allow retrieval based on conditions that involve high-level concepts..
BibTeX:
@article{fi6040688,
  author = {Risse, Thomas and Demidova, Elena and Dietze, Stefan and Peters, Wim and Papailiou, Nikolaos and Doka, Katerina and Stavrakas, Yannis and Plachouras, Vassilis and Senellart, Pierre and Carpentier, Florent and Mantrach, Amin and Cautis, Bogdan and Siehndel, Patrick and Spiliotopoulos, Dimitris},
  title = {The ARCOMEM Architecture for Social- and Semantic-Driven Web Archiving},
  journal = {Future Internet},
  year = {2014},
  volume = {6},
  number = {4},
  pages = {688--716},
  url = {http://www.mdpi.com/1999-5903/6/4/688},
  doi = {10.3390/fi6040688}
}
Holzmann, H. & Risse, T.
Extraction of Evolution Descriptions from the Web
Proceedings of the 14th ACM/IEEE-CS Joint Conference on Digital Libraries, IEEE Press , 413-414, 2014
Abstract: The evolution of named entities affects exploration and retrieval tasks in digital libraries. An information retrieval system that is aware of name changes can actively support users in finding former occurrences of evolved entities. However, current structured knowledge bases, such as DBpedia or Freebase, do not provide enough information about evolutions, even though the data is available on their resources, like Wikipedia. Our Evolution Base prototype will demonstrate how excerpts describing name evolutions can be identified on these websites with a promising precision. The descriptions are classified by means of models that we trained based on a recent analysis of named entity evolutions on Wikipedia.
BibTeX:
@inproceedings{Holzmann:2014:EED:2740769.2740843,
  author = {Holzmann, Helge and Risse, Thomas},
  title = {Extraction of Evolution Descriptions from the Web},
  booktitle = {Proceedings of the 14th ACM/IEEE-CS Joint Conference on Digital Libraries},
  publisher = {IEEE Press},
  year = {2014},
  pages = {413--414},
  url = {http://dl.acm.org/citation.cfm?id=2740769.2740843}
}
Holzmann, H. & Risse, T.
Benatallah, B.; Bestavros, A.; Manolopoulos, Y.; Vakali, A. & Zhang, Y. (Eds.)
Insights into Entity Name Evolution on Wikipedia
Web Information Systems Engineering – WISE 2014, Springer International Publishing , Vol. 8787, 47-61, 2014
Abstract: Working with Web archives raises a number of issues caused by their temporal characteristics. Depending on the age of the content, additional knowledge might be needed to find and understand older texts. Especially facts about entities are subject to change. Most severe in terms of information retrieval are name changes. In order to find entities that have changed their name over time, search engines need to be aware of this evolution. We tackle this problem by analyzing Wikipedia in terms of entity evolutions mentioned in articles regardless the structural elements. We gathered statistics and automatically extracted minimum excerpts covering name changes by incorporating lists dedicated to that subject. In future work, these excerpts are going to be used to discover patterns and detect changes in other sources. In this work we investigate whether or not Wikipedia is a suitable source for extracting the required knowledge.
BibTeX:
@incollection{holzmann2014insights,
  author = {Holzmann, Helge and Risse, Thomas},
  editor = {Benatallah, Boualem and Bestavros, Azer and Manolopoulos, Yannis and Vakali, Athena and Zhang, Yanchun},
  title = {Insights into Entity Name Evolution on Wikipedia},
  booktitle = {Web Information Systems Engineering – WISE 2014},
  publisher = {Springer International Publishing},
  year = {2014},
  volume = {8787},
  pages = {47-61},
  url = {http://dx.doi.org/10.1007/978-3-319-11746-1_4},
  doi = {10.1007/978-3-319-11746-1_4}
}
Holzmann, H. & Risse, T.
Named Entity Evolution Analysis on Wikipedia
Proc. of the 2014 ACM Conference on Web Science, ACM , 241-242, 2014
Abstract: Accessing Web archives raises a number of issues caused by their temporal characteristics. Additional knowledge is needed to find and understand older texts. Especially entities mentioned in texts are subject to change. Most severe in terms of information retrieval are name changes. In order to find entities that have changed their name over time, search engines need to be aware of this evolution. We tackle this problem by analyzing Wikipedia in terms of entity evolutions mentioned in articles. We present statistical data on excerpts covering name changes, which will be used to discover similar text passages and extract evolution knowledge in future work.
BibTeX:
@inproceedings{holzmann2014named,
  author = {Holzmann, Helge and Risse, Thomas},
  title = {Named Entity Evolution Analysis on Wikipedia},
  booktitle = {Proc. of the 2014 ACM Conference on Web Science},
  publisher = {ACM},
  year = {2014},
  pages = {241-242},
  url = {http://www.l3s.de/~risse/pub/websci2014.pdf},
  doi = {10.1145/2615569.2615639}
}
Lugmayr, A.; Stockleben, B.; Risse, T.; Serral, E. & Stojmenova, E.
Editorial: ambient media as metaphor for creating new experiences and user interfaces
Multimedia Tools and Applications, Springer US , Vol. 71, 1-5, 2014
BibTeX:
@article{lugmayr2014editorial,
  author = {Lugmayr, Artur and Stockleben, Bjoern and Risse, Thomas and Serral, Estefania and Stojmenova, Emilija},
  title = {Editorial: ambient media as metaphor for creating new experiences and user interfaces},
  journal = {Multimedia Tools and Applications},
  publisher = {Springer US},
  year = {2014},
  volume = {71},
  number = {1},
  pages = {1-5},
  url = {http://dx.doi.org/10.1007/s11042-014-1899-0},
  doi = {10.1007/s11042-014-1899-0}
}
Risse, T.; Peters, W.; Senellart, P. & Maynard, D.
Weller, K.; Bruns, A.; Burgess, J.; Mahrt, M. & Puschmann, C. (Eds.)
Documenting Contemporary Society by Preserving Relevant Information from Twitter
Twitter and Society, Peter Lang , 207-219, 2014
BibTeX:
@incollection{noauthororeditor2013documenting,
  author = {Risse, Thomas and Peters, Wim and Senellart, Pierre and Maynard, Diana},
  editor = {Weller, Katrin and Bruns, Axel and Burgess, Jean and Mahrt, Merja and Puschmann, Cornelius},
  title = {Documenting Contemporary Society by Preserving Relevant Information from Twitter },
  booktitle = {Twitter and Society},
  publisher = {Peter Lang},
  year = {2014},
  pages = {207-219},
  url = {http://www.peterlang.com/index.cfm?event=cmp.ccc.seitenstruktur.detailseiten&seitentyp=produkt&pk=79378}
}
Risse, T.; Demidova, E. & Gossen, G.
What Do You Want to Collect from the Web?
Proc. of the Building Web Observatories Workshop (BWOW) 2014, , 2014
Abstract: Today an increasing interest in collecting, analyzing and preserving Web content can be observed in many digital humanities. Especially the Social Web is attractive for many humanities disciplines as it provides a direct access to statements of many people about politics, popular topics or events. In this paper we present an exemplary study that we have conducted with the aim to understand the needs of scientists in social sciences, historical sciences and law with respect to the creation of Web archives.
BibTeX:
@inproceedings{risse2014collect,
  author = {Risse, Thomas and Demidova, Elena and Gossen, Gerhard},
  title = {What Do You Want to Collect from the Web?},
  booktitle = {Proc. of the Building Web Observatories Workshop (BWOW) 2014},
  year = {2014},
  url = {http://www.l3s.de/~risse/pub/bwow2014.pdf}
}

Risse, T.; Predoiu, L.; Nürnberger, A. & Ross, S. (Eds.)
Proceedings of the 4th International Workshop on Semantic Digital Archives (SDA 2014)
CEUR-WS.org , Vol. 1306, 2014
BibTeX:
@proceedings{risse2014proceedings,,
  editor = {Risse, Thomas and Predoiu, Livia and Nürnberger, Andreas and Ross, Seamus},
  title = {Proceedings of the 4th International Workshop on Semantic Digital Archives (SDA 2014)},
  publisher = {CEUR-WS.org},
  year = {2014},
  volume = {1306},
  url = {http://ceur-ws.org/Vol-1306/}
}
Siehndel, P.; Kawase, R.; Herder, E. & Risse, T.
Identifying Topic-Related Hyperlinks on Twitter
Proceedings of the ISWC 2014 Posters & Demonstrations Track a track within the 13th International Semantic Web Conference (ISWC 2014), , Vol. 1272, 369-372, 2014
Abstract: The microblogging service Twitter has become one of the most popular sources of real time information. Every second, hundreds of URLs are posted on Twitter. Due to the maximum tweet length of 140 characters, these URLs are in most cases a shortened version of the original URLs. In contrast to the original URLS, which usually provide some hints on the destination Web site and the specific page, shortened links do not tell the users what to expect behind them. These links might contain relevant information or news regarding a certain topic of interest, but they might just as well be completely irrelevant, or even lead to a malicious or harmful website. In this paper, we present our work towards identifying credible Twitter users for given topics. We achieve this by characterizing the content of the posted URLs to further relate to the expertise of Twitter users.
BibTeX:
@inproceedings{siehndel2014identifying,
  author = {Siehndel, Patrick and Kawase, Ricardo and Herder, Eelco and Risse, Thomas},
  title = {Identifying Topic-Related Hyperlinks on Twitter},
  booktitle = {Proceedings of the ISWC 2014 Posters & Demonstrations Track a track within the 13th International Semantic Web Conference (ISWC 2014)},
  year = {2014},
  volume = {1272},
  pages = {369-372},
  url = {http://ceur-ws.org/Vol-1272/paper_101.pdf}
}

2013


Predoiu, L.; Mitschick, A.; Nürnberger, A.; Risse, T. & Ross, S. (Eds.)
Proceedings of the 3rd International Workshop on Semantic Digital Archives co-located with 17th International Conference on Theory and Practice of Digital Libraries (TPDL 2013), Valetta, Malta, September 26, 2013
SDA, CEUR-WS.org , Vol. 1091, 2013
BibTeX:
@proceedings{DBLP:conf/ercimdl/2013sda,,
  editor = {Predoiu, Livia and Mitschick, Annett and Nürnberger, Andreas and Risse, Thomas and Ross, Seamus},
  title = {Proceedings of the 3rd International Workshop on Semantic Digital Archives co-located with 17th International Conference on Theory and Practice of Digital Libraries (TPDL 2013), Valetta, Malta, September 26, 2013},
  booktitle = {SDA},
  publisher = {CEUR-WS.org},
  year = {2013},
  volume = {1091},
  url = {http://ceur-ws.org/Vol-1091/}
}
Holzmann, H.; Tahmasebi, N. & Risse, T.
Predoiu, L.; Mitschick, A.; Nürnberger, A.; Risse, T. & Ross, S. (Eds.)
BlogNEER: Applying Named Entity Evolution Recognition on the Blogosphere
Proc. of 3rd International Workshop on Semantic Digital Archives, CEUR-WS.org , Vol. 1091, 28-39, 2013
Abstract: The introduction of Social Media allowed more people to publish texts by removing barriers that are technical but also social such as the editorial controls that exist in traditional media. The resulting language tends to be more like spoken language because people adapt their use to the medium. Since spoken language is more dynamic, more new and short lived terms are introduced also in written format on the Web. In teTahmasebi2012 we presented an unsupervised method for Named Entity Evolution Recognition (NEER) to find name changes in newspaper collections. In this paper we present BlogNEER, an extension to apply NEER on blog data. The language used in blogs is often closer to spoken language than to language used in traditional media. BlogNEER introduces a novel semantic filtering method that makes use of Semantic Web resources (i.e., DBpedia) to gain more information about terms. We present the approach of BlogNEER and initial results that show the potentials of the approach.
BibTeX:
@inproceedings{DBLP:conf/ercimdl/HolzmannTR13,
  author = {Holzmann, Helge and Tahmasebi, Nina and Risse, Thomas},
  editor = {Predoiu, Livia and Mitschick, Annett and Nürnberger, Andreas and Risse, Thomas and Ross, Seamus},
  title = {BlogNEER: Applying Named Entity Evolution Recognition on the Blogosphere},
  booktitle = {Proc. of 3rd International Workshop on Semantic Digital Archives},
  publisher = {CEUR-WS.org},
  year = {2013},
  volume = {1091},
  pages = {28-39},
  url = {http://ceur-ws.org/Vol-1091/paper3.pdf}
}
Tahmasebi, N. & Risse, T.
Predoiu, L.; Mitschick, A.; Nürnberger, A.; Risse, T. & Ross, S. (Eds.)
The Role of Language Evolution in Digital Archives
Proc. of 3rd International Workshop on Semantic Digital Archives, CEUR-WS.org , Vol. 1091, 16-27, 2013
Abstract: With advancements in technology and culture, our language changes. We invent new words, add or change meanings of existing words and change names of existing things. Left untackled, these changes in language create a gap between the language known by users and the language stored in our digital archives. In particular, they affect our possibility to firstly find content and secondly interpret that content. In this paper we discuss the limitations brought on by language evolution and existing methodology for automatically finding evolution. We discuss measured needed in the near future to ensure semantically accessible digital archives for long-term preservation.
BibTeX:
@inproceedings{DBLP:conf/ercimdl/TahmasebiR13,
  author = {Tahmasebi, Nina and Risse, Thomas},
  editor = {Predoiu, Livia and Mitschick, Annett and Nürnberger, Andreas and Risse, Thomas and Ross, Seamus},
  title = {The Role of Language Evolution in Digital Archives},
  booktitle = {Proc. of 3rd International Workshop on Semantic Digital Archives},
  publisher = {CEUR-WS.org},
  year = {2013},
  volume = {1091},
  pages = {16-27},
  url = {http://ceur-ws.org/Vol-1091/paper2.pdf}
}
Spiliotopoulos, D.; Risse, T. & Tahmasebi, N.
Demey, Y. T. & Panetto, H. (Eds.)
SMS 2013 PC Co-Chairs Message
On the Move to Meaningful Internet Systems: OTM 2013 Workshops, Springer , Vol. 8186, 587-587, 2013
BibTeX:
@inproceedings{LNCS81860587,
  author = {Spiliotopoulos, Dimitris and Risse, Thomas and Tahmasebi, Nina},
  editor = {Demey, Yan Tang and Panetto, Hervé},
  title = {SMS 2013 PC Co-Chairs Message},
  booktitle = {On the Move to Meaningful Internet Systems: OTM 2013 Workshops},
  publisher = {Springer},
  year = {2013},
  volume = {8186},
  pages = {587--587},
  doi = {10.1007/978-3-642-41033-8_74}
}
Tahmasebi, N.; Niklas, K.; Zenz, G. & Risse, T.
On the applicability of word sense discrimination on 201 years of modern english
International Journal on Digital Libraries, Springer-Verlag , 1-19, 2013
Abstract: As language evolves over time, documents stored in long- term archives become inaccessible to users. Automatically, detecting and handling language evolution will become a necessity to meet user’s information needs. In this paper, we investigate the performance of modern tools and algorithms applied on modern English to find word senses that will later serve as a basis for finding evolution. We apply the curvature clustering algorithm on all nouns and noun phrases extracted from The Times Archive (1785–1985). We use natural language processors for part-of-speech tagging and lemmatization and report on the performance of these processors over the entire period. We evaluate our clusters using WordNet to verify whether they correspond to valid word senses. Because The Times Archive contains OCR errors, we investigate the effects of such errors on word sense discrimination results. Finally, we present a novel approach to correct OCR errors present in the archive and show that the coverage of the curvature clustering algorithm improves. We increase the number of clusters by 24 %. To verify our results, we use the New York Times corpus (1987–2007), a recent collection that is considered error free, as a ground truth for our experiments. We find that after correcting OCR errors in The Times Archive, the performance of word sense discrimination applied on The Times Archive is comparable to the ground truth.
BibTeX:
@article{tahmasebi2013applicability,
  author = {Tahmasebi, Nina and Niklas, Kai and Zenz, Gideon and Risse, Thomas},
  title = {On the applicability of word sense discrimination on 201 years of modern english},
  journal = {International Journal on Digital Libraries},
  publisher = {Springer-Verlag},
  year = {2013},
  pages = {1-19},
  doi = {10.1007/s00799-013-0105-8}
}

2012

Alrifai, M.; Risse, T. & Nejdl, W.
A hybrid approach for efficient Web service composition with end-to-end QoS constraints
ACM Trans. Web, ACM , Vol. 6, 7:1-7:31, 2012
Abstract: Dynamic selection of Web services at runtime is important for building flexible and loosely-coupled service-oriented applications. An abstract description of the required services is provided at design-time, and matching service offers are located at runtime. With the growing number of Web services that provide the same functionality but differ in quality parameters (e.g., availability, response time), a decision needs to be made on which services should be selected such that the user's end-to-end QoS requirements are satisfied. Although very efficient, local selection strategy fails short in handling global QoS requirements. Solutions based on global optimization, on the other hand, can handle global constraints, but their poor performance renders them inappropriate for applications with dynamic and realtime requirements. In this article we address this problem and propose a hybrid solution that combines global optimization with local selection techniques to benefit from the advantages of both worlds. The proposed solution consists of two steps: first, we use mixed integer programming (MIP) to find the optimal decomposition of global QoS constraints into local constraints. Second, we use distributed local selection to find the best Web services that satisfy these local constraints. The results of experimental evaluation indicate that our approach significantly outperforms existing solutions in terms of computation time while achieving close-to-optimal results.
BibTeX:
@article{Alrifai:2012:HAE:2180861.2180864,
  author = {Alrifai, Mohammad and Risse, Thomas and Nejdl, Wolfgang},
  title = {A hybrid approach for efficient Web service composition with end-to-end QoS constraints},
  journal = {ACM Trans. Web},
  publisher = {ACM},
  year = {2012},
  volume = {6},
  number = {2},
  pages = {7:1--7:31},
  url = {http://doi.acm.org/10.1145/2180861.2180864},
  doi = {10.1145/2180861.2180864}
}
Dietze, S.; Maynard, D.; Demidova, E.; Risse, T.; Peters, W.; Doka, K. & Stavrakas, Y.
Mitschick, A.; Loizides, F.; Predoiu, L.; Nürnberger, A. & Ross, S. (Eds.)
Entity Extraction and Consolidation for Social Web Content Preservation.
2nd International Workshop on Semantic Digital Archives, CEUR-WS.org , Vol. 912, 18-29, 2012
Abstract: With the rapidly increasing pace at which Web content is evolving, particularly social media, preserving the Web and its evolution over time becomes an important challenge. Meaningful analysis of Web content lends itself to an entity-centric view to organise Web resources according to the information objects related to them. Therefore, the crucial challenge is to extract, detect and correlate entities from a vast number of heterogeneous Web resources where the nature and quality of the content may vary heavily. While a wealth of information extraction tools aid this process, we believe that, the consolidation of automatically extracted data has to be treated as an equally important step in order to ensure high quality and non-ambiguity of generated data. In this paper we present an approach which is based on an iterative cycle exploiting Web data for (1) targeted archiving/crawling of Web objects, (2) entity extraction, and detection, and (3) entity correlation. The long-term goal is to preserve Web con-tent over time and allow its navigation and analysis based on well-formed struc-tured RDF data about entities.
BibTeX:
@inproceedings{conf/ercimdl/DietzeMDRPDS12,
  author = {Dietze, Stefan and Maynard, Diana and Demidova, Elena and Risse, Thomas and Peters, Wim and Doka, Katerina and Stavrakas, Yannis},
  editor = {Mitschick, Annett and Loizides, Fernando and Predoiu, Livia and Nürnberger, Andreas and Ross, Seamus},
  title = {Entity Extraction and Consolidation for Social Web Content Preservation.},
  booktitle = {2nd International Workshop on Semantic Digital Archives},
  publisher = {CEUR-WS.org},
  year = {2012},
  volume = {912},
  pages = {18-29},
  url = {http://ceur-ws.org/Vol-912/paper1.pdf}
}

Kay, M. & Boitet, C. (Eds.)
COLING 2012, 24th International Conference on Computational
Linguistics, Proceedings of the Conference: Technical Papers,
8-15 December 2012, Mumbai, India

COLING, Indian Institute of Technology Bombay , 2012
BibTeX:
@proceedings{DBLP:conf/coling/2012,,
  editor = {Kay, Martin and Boitet, Christian},
  title = {COLING 2012, 24th International Conference on Computational
Linguistics, Proceedings of the Conference: Technical Papers,
8-15 December 2012, Mumbai, India}, booktitle = {COLING}, publisher = {Indian Institute of Technology Bombay}, year = {2012} }
Lugmayr, A.; Stockleben, B.; Risse, T.; Kaario, J. & Pogorelc, B.
New business, design and models to create semantic ambient media experiences
Multimedia Tools and Applications, Springer US , Vol. 66, 1-5, 2012
BibTeX:
@article{lugmayr2012business,
  author = {Lugmayr, Artur and Stockleben, Bjoern and Risse, Thomas and Kaario, Juha and Pogorelc, Bogdan},
  title = {New business, design and models to create semantic ambient media experiences},
  journal = {Multimedia Tools and Applications},
  publisher = {Springer US},
  year = {2012},
  volume = {66},
  number = {1},
  pages = {1-5},
  url = {http://dx.doi.org/10.1007/s11042-012-1239-1},
  doi = {10.1007/s11042-012-1239-1}
}
Pogorelc, B.; Lugmayr, A.; Stockleben, B.; Vatavu, R.-D.; Tahmasebi, N.; Serral, E.; Stojmenova, E.; Imperl, B.; Risse, T.; Zenz, G. & Gams, M.
Ambient bloom: new business, content, design and models to increase the semantic ambient media experience
Multimedia Tools and Applications, Springer US , Vol. 66, 7-32, 2012
Abstract: Semantic ambient media are the novel trend in the world of media reaching from the pioneering subareas such as ambient advertising to the new and emerging subareas such as ambient assisted living. They will likely shape the upcoming years in terms of modeling smart environments and also media consumption and interaction. This work analyzes semantic ambient media by considering business models, content and media, interaction design and consumer experience, and methods and techniques that are important to create this new form of media. Discussion is led using the state-of-the-art event of the semantic ambient media, which is the annual international workshop on Semantic Ambient Media Experience (SAME). The study also creates a vision for how ambient media will evolve and how they will look like in the future decade.
BibTeX:
@article{pogorelc2012ambient,
  author = {Pogorelc, Bogdan and Lugmayr, Artur and Stockleben, Björn and Vatavu, Radu-Daniel and Tahmasebi, Nina and Serral, Estefanía and Stojmenova, Emilija and Imperl, Bojan and Risse, Thomas and Zenz, Gideon and Gams, Matjaž},
  title = {Ambient bloom: new business, content, design and models to increase the semantic ambient media experience},
  journal = {Multimedia Tools and Applications},
  publisher = {Springer US},
  year = {2012},
  volume = {66},
  number = {1},
  pages = {7-32},
  doi = {10.1007/s11042-012-1228-4}
}
Risse, T. & Peters, W.
ARCOMEM: from collect-all ARchives to COmmunity MEMories
Proceedings of the 21st international conference companion on World Wide Web, ACM , 275-278, 2012
Abstract: The ARCOMEM project is about memory institutions like archives, museums and libraries in the age of the Social Web. Social media are becoming more and more pervasive in all areas of life. ARCOMEM's aim is to help to transform archives into collective memories that are more tightly integrated with their community of users and to exploit Web 2.0 and the wisdom of crowds to make Web archiving a more selective and meaning-based process. ARCOMEM (FP7-IST-270239) is an Integrating Project in the FP7 program of the European Commission, which involves twelve partners from academia, industry and public sector. The project will run from January 1, 2011 to December 31, 2013.
BibTeX:
@inproceedings{Risse:2012:ACA:2187980.2188027,
  author = {Risse, Thomas and Peters, Wim},
  title = {ARCOMEM: from collect-all ARchives to COmmunity MEMories},
  booktitle = {Proceedings of the 21st international conference companion on World Wide Web},
  publisher = {ACM},
  year = {2012},
  pages = {275--278},
  url = {http://doi.acm.org/10.1145/2187980.2188027},
  doi = {10.1145/2187980.2188027}
}
Tahmasebi, N.; Gossen, G. & Risse, T.
Zaphiris, P.; Buchanan, G.; Rasmussen, E. & Loizides, F. (Eds.)
Which Words Do You Remember? Temporal Properties of Language Use in Digital Archives
Theory and Practice of Digital Libraries, Springer , Vol. 7489, 32-37, 2012
Abstract: Knowing the behavior of terms in written texts can help us tailor fit models, algorithms and resources to improve access to digital libraries and help us answer information needs in longer spanning archives. In this paper we investigate the behavior of English written text in blogs in comparison to traditional texts from the New York Times, The Times Archive, and the British National Corpus. We show that user generated content, similar to spoken content, differs in characteristics from ‘professionally’ written text and experiences a more dynamic behavior.
BibTeX:
@incollection{springerlink:10.1007/978-3-642-33290-6_4,
  author = {Tahmasebi, Nina and Gossen, Gerhard and Risse, Thomas},
  editor = {Zaphiris, Panayiotis and Buchanan, George and Rasmussen, Edie and Loizides, Fernando},
  title = {Which Words Do You Remember? Temporal Properties of Language Use in Digital Archives},
  booktitle = {Theory and Practice of Digital Libraries},
  publisher = {Springer},
  year = {2012},
  volume = {7489},
  pages = {32-37},
  url = {http://dx.doi.org/10.1007/978-3-642-33290-6_4},
  doi = {10.1007/978-3-642-33290-6_4}
}
Risse, T.; Dietze, S.; Peters, W.; Doka, K.; Stavrakas, Y. & Senellart, P.
Zaphiris, P.; Buchanan, G.; Rasmussen, E. & Loizides, F. (Eds.)
Exploiting the Social and Semantic Web for Guided Web Archiving
Theory and Practice of Digital Libraries, Springer , Vol. 7489, 426-432, 2012
Abstract: The constantly growing amount of Web content and the success of the Social Web lead to increasing needs for Web archiving. These needs go beyond the pure preservation of Web pages. Web archives are turning into “community memories” that aim at building a better understanding of the public view on, e.g., celebrities, court decisions, and other events. In this paper we present the ARCOMEM architecture that uses semantic information such as entities, topics, and events complemented with information from the social Web to guide a novel Web crawler. The resulting archives are automatically enriched with semantic meta-information to ease the access and allow retrieval based on conditions that involve high-level concepts.
BibTeX:
@incollection{springerlink:10.1007/978-3-642-33290-6_47,
  author = {Risse, Thomas and Dietze, Stefan and Peters, Wim and Doka, Katerina and Stavrakas, Yannis and Senellart, Pierre},
  editor = {Zaphiris, Panayiotis and Buchanan, George and Rasmussen, Edie and Loizides, Fernando},
  title = {Exploiting the Social and Semantic Web for Guided Web Archiving},
  booktitle = {Theory and Practice of Digital Libraries},
  publisher = {Springer},
  year = {2012},
  volume = {7489},
  pages = {426-432},
  url = {http://dx.doi.org/10.1007/978-3-642-33290-6_47},
  doi = {10.1007/978-3-642-33290-6_47}
}
Pogorelc, B.; Vatavu, R.-D.; Lugmayr, A.; Stockleben, B.; Risse, T.; Kaario, J.; Lomonaco, E. & Gams, M.
Semantic ambient media: From ambient advertising to ambient-assisted living
Multimedia Tools and Applications, Springer Netherlands , 1-27, 2012
Abstract: The term ambient media was in its beginning used only for ambient advertising. Nowadays it denotes the media environment and the communication of information in ubiquitous and pervasive environments. With the addition of intelligence, the new field of semantic ambient media was established. In recent years, the field of semantic ambient media has spread its span from only a few sub-areas, such as ambient advertising, to new ones, such as ambient-assisted living (AAL) and health-monitoring media , significantly supported by intelligence. The study presented in this paper provides an advanced introduction to the field of semantic ambient media including the solutions for threat issues and illustration of success stories of the field. It conducts a survey of the related work and presents a thorough discussion of it. The related work is grouped according to the coverage of the principles of semantic ambient media. Based on the state-of-the-art research, the future possibilities of the field are demonstrated, especially for the ambient-assisted living, audio-visual rendering of media objects, user design principles and the society impact of the field. The paper provides ideas for impacting ambient media and directions and questions for further research. It also discusses the potential of the combination of several research studies.
BibTeX:
@article{springerlink:10.1007/s11042-011-0917-8,
  author = {Pogorelc, Bogdan and Vatavu, Radu-Daniel and Lugmayr, Artur and Stockleben, Björn and Risse, Thomas and Kaario, Juha and Lomonaco, Estefania and Gams, Matjaž},
  title = {Semantic ambient media: From ambient advertising to ambient-assisted living},
  journal = {Multimedia Tools and Applications},
  publisher = {Springer Netherlands},
  year = {2012},
  pages = {1-27},
  url = {http://dx.doi.org/10.1007/s11042-011-0917-8},
  doi = {10.1007/s11042-011-0917-8}
}
Zenz, G.; Tahmasebi, N. & Risse, T.
Towards mobile language evolution exploitation
Multimedia Tools and Applications, Springer Netherlands , 1-13, 2012
Abstract: Knowing about the evolution of a term can significantly help when searching for relevant information, especially in case of sudden evolutions (e.g. as of dramatical changes in political situations). Here, some terms get a completely new meaning or are used in new or different ways. In mobile situations it is important to be able to effectively retrieve information, since this is usually done in a hurry and interaction possibilities with mobile devices are limited. In this paper we describe a methodology using word sense discrimination to discover term evolution. We present two mobile interfaces for easy access and exploration of this evolution, as well as a user-study to show its usefulness. We conclude the paper with an outlook of further research possibilities in this new topic.
BibTeX:
@article{springerlink:10.1007/s11042-011-0973-0,
  author = {Zenz, Gideon and Tahmasebi, Nina and Risse, Thomas},
  title = {Towards mobile language evolution exploitation},
  journal = {Multimedia Tools and Applications},
  publisher = {Springer Netherlands},
  year = {2012},
  pages = {1-13},
  url = {http://dx.doi.org/10.1007/s11042-011-0973-0},
  doi = {10.1007/s11042-011-0973-0}
}
Tahmasebi, N.; Gossen, G.; Kanhabua, N.; Holzmann, H. & Risse, T.
Kay, M. & Boitet, C. (Eds.)
NEER: An Unsupervised Method for Named Entity Evolution
Recognition

COLING, Indian Institute of Technology Bombay , 2553-2568, 2012
Abstract: High impact events, political changes and new technologies are reflected in our language and lead to constant evolution of terms, expressions and names. Not knowing about names used in the past for referring to a named entity can severely decrease the performance of many computational linguistic algorithms. We propose NEER, an unsupervised method for named entity evolution recognition independent of external knowledge sources. We find time periods with high likelihood of evolution. By analyzing only these time periods using a sliding window co-occurrence method we capture evolving terms in the same context. We thus avoid comparing terms from widely different periods in time and overcome a severe limitation of existing methods for named entity evolution, as shown by the high recall of 90% on the New York Times corpus. We compare several relatedness measures for filtering to improve precision. Furthermore, using machine learning with minimal supervision improves precision to 94%.
BibTeX:
@inproceedings{tahmasebi2012unsupervised,
  author = {Tahmasebi, Nina and Gossen, Gerhard and Kanhabua, Nattiya and Holzmann, Helge and Risse, Thomas},
  editor = {Kay, Martin and Boitet, Christian},
  title = {NEER: An Unsupervised Method for Named Entity Evolution
Recognition}, booktitle = {COLING}, publisher = {Indian Institute of Technology Bombay}, year = {2012}, pages = {2553-2568}, url = {https://aclweb.org/anthology/C/C12/C12-1156.pdf} }

2011

Maniu, S.; Cautis, B. & Abdessalem, T.
Barbosa, D.; Miklau, G. & Yu, C. (Eds.)
Building a signed network from interactions in Wikipedia.
DBSocial, ACM , 19-24, 2011
BibTeX:
@inproceedings{conf/dbsocial/ManiuCA11,
  author = {Maniu, Silviu and Cautis, Bogdan and Abdessalem, Talel},
  editor = {Barbosa, Denilson and Miklau, Gerome and Yu, Cong},
  title = {Building a signed network from interactions in Wikipedia.},
  booktitle = {DBSocial},
  publisher = {ACM},
  year = {2011},
  pages = {19-24},
  url = {http://dblp.uni-trier.de/db/conf/dbsocial/dbsocial2011.html#ManiuCA11}
}
Kunz, C.; Tahmasebi, N.; Risse, T. & Smith, M.
Jha, S.; gentschen Felde, N.; Buyya, R. & Fedak, G. (Eds.)
Detecting Credential Abuse in the Grid Using Bayesian Networks.
12th IEEE/ACM International Conference on Grid Computing (GRID), IEEE , 114-120, 2011
BibTeX:
@inproceedings{conf/grid/KunzTRS11,
  author = {Kunz, Christopher and Tahmasebi, Nina and Risse, Thomas and Smith, Matthew},
  editor = {Jha, Shantenu and gentschen Felde, Nils and Buyya, Rajkumar and Fedak, Gilles},
  title = {Detecting Credential Abuse in the Grid Using Bayesian Networks.},
  booktitle = {12th IEEE/ACM International Conference on Grid Computing (GRID)},
  publisher = {IEEE},
  year = {2011},
  pages = {114-120},
  url = {http://dblp.uni-trier.de/db/conf/grid/grid2011.html#KunzTRS11}
}
Hare, J. S.; Samangooei, S. & Dupplaw, D.
Candan, K. S.; Panchanathan, S.; Prabhakaran, B.; Sundaram, H.; chi Feng, W. & Sebe, N. (Eds.)
OpenIMAJ and ImageTerrier: Java libraries and tools for scalable multimedia analysis and indexing of images.
ACM Multimedia, ACM , 691-694, 2011
BibTeX:
@inproceedings{conf/mm/HareSD11,
  author = {Hare, Jonathon S. and Samangooei, Sina and Dupplaw, David},
  editor = {Candan, K. Selçuk and Panchanathan, Sethuraman and Prabhakaran, Balakrishnan and Sundaram, Hari and chi Feng, Wu and Sebe, Nicu},
  title = {OpenIMAJ and ImageTerrier: Java libraries and tools for scalable multimedia analysis and indexing of images.},
  booktitle = {ACM Multimedia},
  publisher = {ACM},
  year = {2011},
  pages = {691-694},
  url = {http://dblp.uni-trier.de/db/conf/mm/mm2011.html#HareSD11}
}
Papadakis, G.; Ioannou, E.; Niederée, C. & Fankhauser, P.
King, I.; Nejdl, W. & Li, H. (Eds.)
Efficient entity resolution for large heterogeneous information spaces.
WSDM, ACM , 535-544, 2011
BibTeX:
@inproceedings{conf/wsdm/PapadakisINF11,
  author = {Papadakis, George and Ioannou, Ekaterini and Niederée, Claudia and Fankhauser, Peter},
  editor = {King, Irwin and Nejdl, Wolfgang and Li, Hang},
  title = {Efficient entity resolution for large heterogeneous information spaces.},
  booktitle = {WSDM},
  publisher = {ACM},
  year = {2011},
  pages = {535-544},
  url = {http://dblp.uni-trier.de/db/conf/wsdm/wsdm2011.html#PapadakisINF11}
}
Maniu, S.; Abdessalem, T. & Cautis, B.
Srinivasan, S.; Ramamritham, K.; Kumar, A.; Ravindra, M. P.; Bertino, E. & Kumar, R. (Eds.)
Casting a web of trust over Wikipedia: an interaction-based approach.
WWW (Companion Volume), ACM , 87-88, 2011
BibTeX:
@inproceedings{conf/www/ManiuAC11,
  author = {Maniu, Silviu and Abdessalem, Talel and Cautis, Bogdan},
  editor = {Srinivasan, Sadagopan and Ramamritham, Krithi and Kumar, Arun and Ravindra, M. P. and Bertino, Elisa and Kumar, Ravi},
  title = {Casting a web of trust over Wikipedia: an interaction-based approach.},
  booktitle = {WWW (Companion Volume)},
  publisher = {ACM},
  year = {2011},
  pages = {87-88},
  url = {http://dblp.uni-trier.de/db/conf/www/www2011c.html#ManiuAC11}
}
Tahmasebi, N.; Risse, T. & Dietze, S.
Towards automatic language evolution tracking, A study on word sense tracking
Proc. of the Joint Workshop on Knowledge Evolution and Ontology Dynamics (EvoDyn 2011), in conjunction with ISWC 2011, ceur-ws.org Vol. 784, , 2011
Abstract: Knowing about language evolution can significantly help to reveal lost information and help access documents containing language that has long since been forgotten. In this position paper we will report on our methods for finding word senses and show how these can be used to reveal important information about their evolution over time. We discuss the weaknesses of current approaches and outline future work to overcome these weaknesses.
BibTeX:
@inproceedings{L3S_2bea4aa5a8726bcc53517c8b846a754e721efa11,
  author = {Tahmasebi, Nina and Risse, Thomas and Dietze, Stefan},
  title = {Towards automatic language evolution tracking, A study on word sense tracking},
  booktitle = {Proc. of the Joint Workshop on Knowledge Evolution and Ontology Dynamics (EvoDyn 2011), in conjunction with ISWC 2011, ceur-ws.org Vol. 784},
  year = {2011},
  url = {http://www.l3s.de/~risse/pub/evodyn2011.pdf}
}
Edelstein, O.; Factor, M.; King, R.; Risse, T.; Salant, E. & Taylor, P.
Evolving Domains, Problems and Solutions for Long Term Digital Preservation
Proc. of 8th International Conference on Preservation of Digital Objects (iPRES 2011), Singapore, November 1-4, 2011., , 2011
Abstract: We present, compare and contrast new directions in long term digital preservation as covered by the four large European Community funded research projects that started in 2011. The new projects widen the domain of digital preservation from the traditional purview of memory institutions preserving documents to include scenarios such as health-care, data with direct commercial value, and web-based data. Some of these projects consider not only how to preserve the programs needed to interpret the data but also how to manage and preserve the related workflows. Considerations such as risk analysis and cost estimation are built into some of them, and more than one of these efforts is examining the use of cloud-based technologies. All projects look into programmatic solutions, while emphasizing different aspects such as data collection, scalability, reconfigurability, and full lifecycle management. These new directions will make digital preservation applicable to a wider domain of users and will give better tools to assist in the process.
BibTeX:
@inproceedings{L3S_85d76aa20d99f692ee0fcd15253ca6fd13da4376,
  author = {Edelstein, Orit and Factor, Michael and King, Ross and Risse, Thomas and Salant, Eliot and Taylor, Philip},
  title = {Evolving Domains, Problems and Solutions for Long Term Digital Preservation},
  booktitle = {Proc. of 8th International Conference on Preservation of Digital Objects (iPRES 2011), Singapore, November 1-4, 2011.},
  year = {2011},
  url = {http://www.l3s.de/~risse/pub/ipres2011.pdf}
}
Risse, T.; Dietze, S.; Maynard, D.; Tahmasebi, N. & Peters, W.
Using Events for Content Appraisal and Selection in Web Archives
Proc. of the Workhop on Detection, Representation, and Exploitation of Events in the Semantic Web DeRiVE 2011, in conjunction with ISWC 2011, CEUR Workshop Proceedings Vol. 779, , 2011
BibTeX:
@inproceedings{L3S_c97953ba53a48eeecaf304caaf3d4a9764f448e4,
  author = {Risse, Thomas and Dietze, Stefan and Maynard, Diana and Tahmasebi, Nina and Peters, Wim},
  title = {Using Events for Content Appraisal and Selection in Web Archives},
  booktitle = {Proc. of the Workhop on Detection, Representation, and Exploitation of Events in the Semantic Web DeRiVE 2011, in conjunction with ISWC 2011, CEUR Workshop Proceedings Vol. 779},
  year = {2011},
  url = {http://www.l3s.de/~risse/pub/derive2011.pdf}
}

2010

Lugmayr, A.; Stockleben, B.; Kaario, J.; Pogorelc, B. & Risse, T.
de Ruyter, B. E. R.; Wichert, R.; Keyson, D. V.; Markopoulos, P.; Streitz, N.; Divitini, M.; Georgantas, N. & Gomez, A. M. (Eds.)
3rd Workshop on Semantic Ambient Media Experience (SAME) - In Conjunction with AmI-2010.
AmI, Springer , Vol. 6439, 342-345, 2010
BibTeX:
@inproceedings{conf/ami/LugmayrSKPR10,
  author = {Lugmayr, Artur and Stockleben, Björn and Kaario, Juha and Pogorelc, Bogdan and Risse, Thomas},
  editor = {de Ruyter, Boris E. R. and Wichert, Reiner and Keyson, David V. and Markopoulos, Panos and Streitz, Norbert and Divitini, Monica and Georgantas, Nikolaos and Gomez, Antonio Mana},
  title = {3rd Workshop on Semantic Ambient Media Experience (SAME) - In Conjunction with AmI-2010.},
  booktitle = {AmI},
  publisher = {Springer},
  year = {2010},
  volume = {6439},
  pages = {342-345},
  url = {http://dblp.uni-trier.de/db/conf/ami/ami2010.html#LugmayrSKPR10}
}
Tahmasebi, N.; Niklas, K.; Theuerkauf, T. & Risse, T.
Hunter, J.; Lagoze, C.; Giles, C. L. & Li, Y.-F. (Eds.)
Using word sense discrimination on historic document collections.
JCDL, ACM , 89-98, 2010
BibTeX:
@inproceedings{conf/jcdl/TahmasebiNTR10,
  author = {Tahmasebi, Nina and Niklas, Kai and Theuerkauf, Thomas and Risse, Thomas},
  editor = {Hunter, Jane and Lagoze, Carl and Giles, C. Lee and Li, Yuan-Fang},
  title = {Using word sense discrimination on historic document collections.},
  booktitle = {JCDL},
  publisher = {ACM},
  year = {2010},
  pages = {89-98},
  url = {http://dblp.uni-trier.de/db/conf/jcdl/jcdl2010.html#TahmasebiNTR10}
}
Alrifai, M.; Skoutas, D. & Risse, T.
Rappa, M.; Jones, P.; Freire, J. & Chakrabarti, S. (Eds.)
Selecting skyline services for QoS-based web service composition.
WWW, ACM , 11-20, 2010
BibTeX:
@inproceedings{conf/www/AlrifaiSR10,
  author = {Alrifai, Mohammad and Skoutas, Dimitrios and Risse, Thomas},
  editor = {Rappa, Michael and Jones, Paul and Freire, Juliana and Chakrabarti, Soumen},
  title = {Selecting skyline services for QoS-based web service composition.},
  booktitle = {WWW},
  publisher = {ACM},
  year = {2010},
  pages = {11-20},
  url = {http://dblp.uni-trier.de/db/conf/www/www2010.html#AlrifaiSR10}
}
Zenz, G.; Tahmasebi, N. & Risse, T.
Language Evolution On The Go
Proc. of SAME 2010 - 3rd International Workshop on Semantic Ambient Media Experience (NAMU Series), November, 10th-12th November 2010, Malaga, Spain, , 2010
Abstract: Knowing about the evolution of a term can significantly decrease time needed for searching for information. It can also aid in quickly getting a broader overview, which is essential when one is on the move. In this paper we present a solution for providing language evolution knowledge ``on the go". We present a mobile interface for easy access and visualization as well as an overview of how this evolution was found.
BibTeX:
@inproceedings{L3S_161e36bf423dca27dc04593f70d9dfdf4cb9379b,
  author = {Zenz, Gideon and Tahmasebi, Nina and Risse, Thomas},
  title = {Language Evolution On The Go},
  booktitle = {Proc. of SAME 2010 - 3rd International Workshop on Semantic Ambient Media Experience (NAMU Series), November, 10th-12th November 2010, Malaga, Spain},
  year = {2010},
  url = {http://www.l3s.de/~risse/pub/same2010.pdf}
}
Tahmasebi, N.; Zenz, G.; Iofciu, T. & Risse, T.
Terminology Evolution Module for Web Archives in the LiWA Context
Proc. of 10th International Web Archiving Workshop in conjunction with iPRES in Vienna, Austria, 2010, , 2010
Abstract: More and more national libraries and institutes are archiving the web as a part of the cultural heritage. As with all long term archives, these archives contain text and language that evolves over time. This is particularly true for web archives as content published online is highly dynamic and changing at a fast rate. The language evolution causes gaps between the terminology used for querying and the one stored in long term archives. To ensure access and interpretability of these archives, language evolution must be found and handled in an automatic manner. In this paper we present the LiWA Terminology evolution module, TeVo which takes us one step closer to fully automatic detection of terminology evolution. TeVo consists of a pipeline for finding evolution from web archives based on the UIMA framework. The LiWA TeVo module consists of two main processing chains, the first for Warc file extraction and text processing and the second for finding terminology evolution. We also present the terminology evolution browser, the TeVo browser, which aids in exploring evolution of terms present in archives.
BibTeX:
@inproceedings{L3S_2aaf8c67a65197717cd4f40e01d9c29987f5277d,
  author = {Tahmasebi, Nina and Zenz, Gideon and Iofciu, Tereza and Risse, Thomas},
  title = {Terminology Evolution Module for Web Archives in the LiWA Context},
  booktitle = {Proc. of 10th International Web Archiving Workshop in conjunction with iPRES in Vienna, Austria, 2010},
  year = {2010},
  url = {http://www.l3s.de/~risse/pub/iwaw2010.pdf}
}

2009

Alrifai, M.; Risse, T.; Dolog, P. & Nejdl, W.
Feuerlicht, G. & Lamersdorf, W. (Eds.)
A Scalable Approach for QoS-Based Web Service Selection
Service-Oriented Computing – ICSOC 2008 Workshops, Springer Berlin Heidelberg , Vol. 5472, 190-199, 2009
Abstract: QoS-based service selection aims at finding the best component services that satisfy the end-to-end quality requirements. The problem can be modeled as a multi-dimension multi-choice 0-1 knapsack problem, which is known as NP-hard. Recently published solutions propose using linear programming techniques to solve the problem. However, the poor scalability of linear program solving methods restricts their applicability to small-size problems and renders them inappropriate for dynamic applications with run-time requirements. In this paper, we address this problem and propose a scalable QoS computation approach based on a heuristic algorithm, which decomposes the optimization problem into small sub-problems that can be solved more efficiently than the original problem. Experimental evaluations show that near-to-optimal solutions can be found using our algorithm much faster than using linear programming methods.
BibTeX:
@incollection{alrifai2009scalable,
  author = {Alrifai, Mohammad and Risse, Thomas and Dolog, Peter and Nejdl, Wolfgang},
  editor = {Feuerlicht, George and Lamersdorf, Winfried},
  title = {A Scalable Approach for QoS-Based Web Service Selection},
  booktitle = {Service-Oriented Computing – ICSOC 2008 Workshops},
  publisher = {Springer Berlin Heidelberg},
  year = {2009},
  volume = {5472},
  pages = {190-199},
  url = {http://www.l3s.de/~risse/pub/QoSCSOA.pdf},
  doi = {10.1007/978-3-642-01247-1_20}
}
Denecke, K.; Risse, T. & Baehr, T.
Grosky, B.; Andrès, F. & Pichappan, P. (Eds.)
Text classification based on limited bibliographic metadata.
ICDIM, IEEE , 27-32, 2009
BibTeX:
@inproceedings{conf/icdim/DeneckeRB09,
  author = {Denecke, Kerstin and Risse, Thomas and Baehr, Thomas},
  editor = {Grosky, Bill and Andrès, Frédéric and Pichappan, Pit},
  title = {Text classification based on limited bibliographic metadata.},
  booktitle = {ICDIM},
  publisher = {IEEE},
  year = {2009},
  pages = {27-32},
  url = {http://dblp.uni-trier.de/db/conf/icdim/icdim2009.html#DeneckeRB09}
}
Alrifai, M. & Risse, T.
Quemada, J.; León, G.; Maarek, Y. S. & Nejdl, W. (Eds.)
Combining global optimization with local selection for efficient QoS-aware service composition.
WWW, ACM , 881-890, 2009
BibTeX:
@inproceedings{conf/www/AlrifaiR09,
  author = {Alrifai, Mohammad and Risse, Thomas},
  editor = {Quemada, Juan and León, Gonzalo and Maarek, Yoëlle S. and Nejdl, Wolfgang},
  title = {Combining global optimization with local selection for efficient QoS-aware service composition.},
  booktitle = {WWW},
  publisher = {ACM},
  year = {2009},
  pages = {881-890},
  url = {http://dblp.uni-trier.de/db/conf/www/www2009.html#AlrifaiR09}
}
Lugmayr, A.; Risse, T.; Stockleben, B.; Kaario, J. & Laurila, K.
Special issue on semantic ambient media experience.
Multimedia Tools Appl., , Vol. 44, 331-335, 2009
BibTeX:
@article{journals/mta/LugmayrRSKL09,
  author = {Lugmayr, Artur and Risse, Thomas and Stockleben, Björn and Kaario, Juha and Laurila, Kari},
  title = {Special issue on semantic ambient media experience.},
  journal = {Multimedia Tools Appl.},
  year = {2009},
  volume = {44},
  number = {3},
  pages = {331-335},
  url = {http://dblp.uni-trier.de/db/journals/mta/mta44.html#LugmayrRSKL09}
}
Knežević, P.; Wombacher, A. & Risse, T.
Damiani, E.; Yetongnon, K.; Chbeir, R. & Dipanda, A. (Eds.)
DHT-Based Self-adapting Replication Protocol for Achieving High Data Availability
Advanced Internet Based Systems and Applications, Springer-Verlag , 201-210, 2009
Abstract: An essential issue in peer-to-peer data management is to keep data highly available all the time. The paper presents a replication protocol that adjusts autonomously the number of replicas to deliver a configured data availability guarantee. The protocol is based on a Distributed Hash Table (DHT), measurement of peer online probability in the system, and adjustment of the number of replicas accordingly. The evaluation shows that we are able to maintain the requested data availability achieving near to optimal storage costs, independent of the number of replicas used during the initialization of the system.
BibTeX:
@inproceedings{Knezevic:2009:DSR:1537834.1537856,
  author = {Knežević, Predrag and Wombacher, Andreas and Risse, Thomas},
  editor = {Damiani, Ernesto and Yetongnon, Kokou and Chbeir, Richard and Dipanda, Albert},
  title = {DHT-Based Self-adapting Replication Protocol for Achieving High Data Availability},
  booktitle = {Advanced Internet Based Systems and Applications},
  publisher = {Springer-Verlag},
  year = {2009},
  pages = {201--210},
  url = {http://dx.doi.org/10.1007/978-3-642-01350-8_19},
  doi = {10.1007/978-3-642-01350-8_19}
}
Lugmayr, A.; Risse, T.; Stockleben, B.; Laurila, K. & Kaario, J.
Semantic Ambient Media---An Introduction
Multimedia Tools and Applications, , Vol. 44, 337-359, 2009
Abstract: The medium is the message! And the message was literacy, media democracy and music charts. Mostly one single distinguishable medium such as TV, the Web, the radio, or books transmitted the message. Now in the age of ubiquitous and pervasive computing, where information flows through a plethora of distributed interlinked media---what is the message ambient media will tell us? What does semantic mean in this context? Which experiences will it open to us? What is content in the age of ambient media? Ambient media are embedded throughout the natural environment of the consumer---in his home, in his car, in restaurants, and on his mobile device. Predominant sample services are smart wallpapers in homes, location based services, RFID based entertainment services for children, or intelligent homes. The goal of this article is to define semantic ambient media and discuss the contributions to the Semantic Ambient Media Experience (SAME) workshop, which was held in conjunction with the ACM Multimedia conference in Vancouver in 2008.
BibTeX:
@article{LugmayrRisseEtAl09mtaa,
  author = {Lugmayr, Artur and Risse, Thomas and Stockleben, Bjoern and Laurila, Kari and Kaario, Juha},
  title = {Semantic Ambient Media---An Introduction},
  journal = {Multimedia Tools and Applications},
  year = {2009},
  volume = {44},
  number = {3},
  pages = {337-359},
  doi = {10.1007/s11042-009-0282-z}
}
Tahmasebi, N.; Ramesh, S. & Risse, T.
First Results on Detecting Term Evolutions
9th International Web Archiving Workshop (IWAW 2009) in conjunction with ECDL 2009, Corfu, Greece, , 2009
BibTeX:
@inproceedings{tahmasebi2009first,
  author = {Tahmasebi, Nina and Ramesh, Sukriti and Risse, Thomas},
  title = {First Results on Detecting Term Evolutions},
  booktitle = {9th International Web Archiving Workshop (IWAW 2009) in conjunction with ECDL 2009, Corfu, Greece},
  year = {2009},
  url = {http://www.l3s.de/~risse/pub/iwaw2009.pdf}
}

2008

Alrifai, M. & Risse, T.
Efficient QoS-aware Web Service Composition
3rd Workshop on Emerging Web Services Technology (WEWST 2008) in conjunction with ECOWS 2008, November 12, 2008, Dublin, Ireland, , 2008
BibTeX:
@inproceedings{alrifai2008efficient,
  author = {Alrifai, Mohammad and Risse, Thomas},
  title = {Efficient QoS-aware Web Service Composition},
  booktitle = {3rd Workshop on Emerging Web Services Technology (WEWST 2008) in conjunction with ECOWS 2008, November 12, 2008, Dublin, Ireland},
  year = {2008},
  url = {http://www.l3s.de/~risse/pub/wewst2008.pdf}
}
Lugmayr, A.; Risse, T.; Stockleben, B.; Kaario, J. & Laurila, K.
Lugmayr, A.; Risse, T.; Stockleben, B.; Kaario, J. & Laurila, K. (Eds.)
Semantic ambient media experiences SAME 2008 pre-workshop review (NAMU series).
SAME, ACM , 1-8, 2008
BibTeX:
@inproceedings{conf/mm/LugmayrRSKL08,
  author = {Lugmayr, Artur and Risse, Thomas and Stockleben, Björn and Kaario, Juha and Laurila, Kari},
  editor = {Lugmayr, Artur and Risse, Thomas and Stockleben, Björn and Kaario, Juha and Laurila, Kari},
  title = {Semantic ambient media experiences SAME 2008 pre-workshop review (NAMU series).},
  booktitle = {SAME},
  publisher = {ACM},
  year = {2008},
  pages = {1-8},
  url = {http://dblp.uni-trier.de/db/conf/mm/same2008.html#LugmayrRSKL08}
}
Lugmayr, A.; Stockleben, B.; Risse, T.; Kaario, J. & Laurila, K.
El-Saddik, A.; Vuong, S.; Griwodz, C.; Bimbo, A. D.; Candan, K. S. & Jaimes, A. (Eds.)
ACM multimedia 2008: 1st workshop on semantic ambient media experiences (SAME2008) namu series.
ACM Multimedia, ACM , 1143-1144, 2008
BibTeX:
@inproceedings{conf/mm/LugmayrSRKL08,
  author = {Lugmayr, Artur and Stockleben, Björn and Risse, Thomas and Kaario, Juha and Laurila, Kari},
  editor = {El-Saddik, Abdulmotaleb and Vuong, Son and Griwodz, Carsten and Bimbo, Alberto Del and Candan, K. Selçuk and Jaimes, Alejandro},
  title = {ACM multimedia 2008: 1st workshop on semantic ambient media experiences (SAME2008) namu series.},
  booktitle = {ACM Multimedia},
  publisher = {ACM},
  year = {2008},
  pages = {1143-1144},
  url = {http://dblp.uni-trier.de/db/conf/mm/mm2008.html#LugmayrSRKL08}
}
Schmidt, P.; Risse, T.; Denecke, K.; Firan, C.; Biesterfeld, J. & Bähr, T.
LINSearch - Aufbereitung von Fachwissen für die Informationsversorgung
KnowTech, 10. Kongress zum Wissensmanagement, , 2008
BibTeX:
@inproceedings{schmidt2008linsearch,
  author = {Schmidt, Paul and Risse, Thomas and Denecke, Kerstin and Firan, Claudiu and Biesterfeld, Jens and Bähr, Thomas},
  title = {LINSearch - Aufbereitung von Fachwissen für die Informationsversorgung},
  booktitle = {KnowTech, 10. Kongress zum Wissensmanagement},
  year = {2008}
}
Tahmasebi, N.; Iofciu, T.; Risse, T.; Niederee, C. & Siberski, W.
Terminology Evolution in Web Archiving: Open Issues
8th International Web Archiving Workshop in conjunction with ECDL 2008, Aarhus, Denmark, , 2008
BibTeX:
@inproceedings{tahmasebi2008terminology,
  author = {Tahmasebi, Nina and Iofciu, Tereza and Risse, Thomas and Niederee, Claudia and Siberski, Wolf},
  title = {Terminology Evolution in Web Archiving: Open Issues},
  booktitle = {8th International Web Archiving Workshop in conjunction with ECDL 2008, Aarhus, Denmark},
  year = {2008},
  url = {http://www.l3s.de/~risse/pub/iwaw2008.pdf}
}

2007

Niederee, C.; Risse, T.; Paukert, M. & Stein, A.
An Architecture Blueprint for Knowlege-based e-Science
1st German e-Science Conference (GES 2007), , 2007
BibTeX:
@inproceedings{niederee2007architecture,
  author = {Niederee, Claudia and Risse, Thomas and Paukert, Marco and Stein, Adelheit},
  title = {An Architecture Blueprint for Knowlege-based e-Science},
  booktitle = {1st German e-Science Conference (GES 2007)},
  year = {2007},
  url = {http://edoc.mpg.de/316509}
}

2006

Knezevic, P.; Wombacher, A. & Risse, T.
Damiani, E.; Yétongnon, K.; Chbeir, R. & Dipanda, A. (Eds.)
DHT-Based Self-adapting Replication Protocol for Achieving High Data Availability.
SITIS, Springer , Vol. 4879, 201-210, 2006
BibTeX:
@inproceedings{conf/sitis/KnezevicWR06,
  author = {Knezevic, Predrag and Wombacher, Andreas and Risse, Thomas},
  editor = {Damiani, Ernesto and Yétongnon, Kokou and Chbeir, Richard and Dipanda, Albert},
  title = {DHT-Based Self-adapting Replication Protocol for Achieving High Data Availability.},
  booktitle = {SITIS},
  publisher = {Springer},
  year = {2006},
  volume = {4879},
  pages = {201-210},
  url = {http://dblp.uni-trier.de/db/conf/sitis/sitis2006.html#KnezevicWR06}
}
Risse, T.
Design and configuration of distributed job processing systems
Darmstadt University of Technology, , 2006
Abstract: A key criterion in the design, procurement and use of computer systems is performance. Performance typically means the throughput and response time of a system. The effects of poorly performing systems range from dissatisfied users to high penalties for companies due to missed processing deadlines. As a result of continuously increasing hardware performance, companies often solve performance problems by replacing existing hardware with faster machines. One consequence can be that they achieve a performance increase, but the overall performance increase is less than expected. The reason for this is that the combination of hardware and software does not match. For system designers it would be helpful to have a systematic method which supports them in the design of new systems and in the extension of existing systems. The need for a systematic configuration method is motivated by a typical B2B application from the financial industry. Banks have to deal with several payment messages standards like EDIFACT or S.W.I.F.T. which have to be converted into the banks' internal representation for further processing. Such converters have to handle message size ranging from some 100 bytes to about 60 MB and have to fulfil certain performance requirements. To achieve the performance goals, identification of the hardware and software configuration is an important step in the implementation of a distributed message converter system. This thesis presents a systematic approach for the cost performance analysis of distributed job processing systems based on given requirements on throughput and system response time. Our method allows us to search for suitable configurations while minimizing the use of expensive methods for performance evaluation to the largest degree. The method is organized into a hardware and a software configuration step. For each of these configuration steps algorithms were developed. For the hardware configuration step we first approximate single host performance by a coarse model that requires few, inexpensive to obtain, key parameters. Based on it we perform the hardware selection and determine the workload distribution for the selected host configuration. The workload distribution and the hardware configuration are used to build a Layered Queueing Network model (LQN) of the complete system. It is used to determine a software configuration that actually achieves the performance that has been predicted given the hardware configuration. Since evaluations of the complete model are rather expensive, we use a greedy heuristic, which tries to minimize the number of model evaluations required. We have used our method to configure a large distributed system in order to demonstrate the scalability of the method. For a smaller system configuration we compared the predicted results with real system measurements. The verification on the real system shows that the method could be applied successfully to configure a distributed system to reach maximum performance. As we are using queueing networks for system performance modeling, our system configuration method is based on average system performance values. Hence runtime deviations are not covered during the system design phase and have to be handled during runtime by a scheduler to distribute incoming jobs in an optimal way among the hosts. In our case of the EDI message converter it turned out that the standard online scheduling method doesn't fulfil all requirements. Hence we adapted the Bin Stretching scheduling approach to fulfil the functional requirements of deadline processing and priority processing as well as the system performance requirements of low system response times and high system throughput. The algorithm behavior has been analyzed by simulation in different scenarios corresponding to different message distributions. The simulation results shows that the modified Bin-Stretching strategy generally gives better results than the well known list scheduling in the FCFS variety. We were also able to verify on our real message converter system the general good behavior of our algorithm.
BibTeX:
@phdthesis{DBLP:phd/de/Risse2006,
  author = {Risse, Thomas},
  title = {Design and configuration of distributed job processing systems},
  school = {Darmstadt University of Technology},
  year = {2006},
  url = {http://elib.tu-darmstadt.de/diss/000665}
}
Kirchner, H. & Risse, T.
Challenges in Information Systems for Disaster Recovery and Response
Proc. of 3rd GI/ITG KuVS Fachgespräch "Ortsbezogene Anwendungen und Dienste", Freie Universität Berlin , 16-19, 2006
BibTeX:
@inproceedings{kirchner2006challenges,
  author = {Kirchner, Holger and Risse, Thomas},
  title = {Challenges in Information Systems for Disaster Recovery and Response},
  booktitle = {Proc. of 3rd GI/ITG KuVS Fachgespräch "Ortsbezogene Anwendungen und Dienste"},
  publisher = {Freie Universität Berlin},
  year = {2006},
  pages = {16-19},
  url = {http://www.l3s.de/~risse/pub/disaster-recovery.pdf}
}
Risse, T.
Cubera, F.; Krämer, B. J. & Papazoglou, M. P. (Eds.)
Decentralized Service Discovery in BRICKS
05462 Abstracts Collection -- Service Oriented Computing (SOC), Internationales Begegnungs- und Forschungszentrum für Informatik (IBFI), Schloss Dagstuhl, Germany , 2006
BibTeX:
@inproceedings{krmer_et_al:DSP:2006:579,
  author = {Risse, Thomas},
  editor = {Cubera, Francisco and Krämer, Bernd J. and Papazoglou, Michael P.},
  title = {Decentralized Service Discovery in BRICKS},
  booktitle = {05462 Abstracts Collection -- Service Oriented Computing (SOC)},
  publisher = {Internationales Begegnungs- und Forschungszentrum für Informatik (IBFI), Schloss Dagstuhl, Germany},
  year = {2006},
  number = {05462},
  url = {http://drops.dagstuhl.de/opus/volltexte/2006/579}
}
Knezevic, P.; Wombacher, A. & Risse, T.
Managing and Recovering High Data Availability in a DHT under Churn
International Conference on Collaborative Computing : Networking, Applications and Worksharing, 2006. CollaborateCom 2006., IEEE , 1-10, 2006
Abstract: An essential issue in peer-to-peer data management is to keep data highly available all the time. A common idea is to replicate data hoping that at least one replica is available when needed. However, due to churns, the number of created replicas could be not sufficient for guaranteeing the intended data availability. If the number of replicas is computed according to the lowest expected peer availability (a classical case), but the expectation were too high, then the peer availability after a churn could be too low, and the system could not be able to recover the requested data availability. The paper is a continuation of previous work (Knezevic et al., 2006) and presents a replication protocol that delivers a configured data availability guarantee, and is resistant to, or recovers fast from churns. The protocol is based on a distributed hash table (DHT), measurement of peer online probability in the system, and adjustment of the number of replicas accordingly. The evaluation shows that we are able to maintain or recover the requested data availability during or shortly after stronger or weaker churns, and at the same time the storage overhead is close to the theoretical minimum
BibTeX:
@inproceedings{ofelectrical2006collaborative,
  author = {Knezevic, Predrag and Wombacher, Andreas and Risse, Thomas},
  title = {Managing and Recovering High Data Availability in a DHT under Churn},
  booktitle = {International Conference on Collaborative Computing : Networking, Applications and Worksharing, 2006. CollaborateCom 2006.},
  publisher = {IEEE},
  year = {2006},
  pages = {1-10}
}

2005

Knezevic, P.; Wombacher, A. & Risse, T.
Despotovic, Z.; Joseph, S. & Sartori, C. (Eds.)
Highly Available DHTs: Keeping Data Consistency After Updates.
AP2PC, Springer , Vol. 4118, 70-80, 2005
BibTeX:
@inproceedings{conf/ap2pc/KnezevicWR05,
  author = {Knezevic, Predrag and Wombacher, Andreas and Risse, Thomas},
  editor = {Despotovic, Zoran and Joseph, Sam and Sartori, Claudio},
  title = {Highly Available DHTs: Keeping Data Consistency After Updates.},
  booktitle = {AP2PC},
  publisher = {Springer},
  year = {2005},
  volume = {4118},
  pages = {70-80},
  url = {http://dblp.uni-trier.de/db/conf/ap2pc/ap2pc2005.html#KnezevicWR05}
}
Niederée, C.; Stewart, A.; Muscogiuri, C.; Hemmje, M. & Risse, T.
Hemmje, M.; Niederée, C. & Risse, T. (Eds.)
Understanding and Tailoring Your Scientific Information Environment: A Context-Oriented View on E-Science Support.
From Integrated Publication and Information Systems to Virtual Information and Knowledge Environments, Springer , Vol. 3379, 289-298, 2005
BibTeX:
@inproceedings{conf/birthday/NiedereeSMHR05,
  author = {Niederée, Claudia and Stewart, Avare and Muscogiuri, Claudio and Hemmje, Matthias and Risse, Thomas},
  editor = {Hemmje, Matthias and Niederée, Claudia and Risse, Thomas},
  title = {Understanding and Tailoring Your Scientific Information Environment: A Context-Oriented View on E-Science Support.},
  booktitle = {From Integrated Publication and Information Systems to Virtual Information and Knowledge Environments},
  publisher = {Springer},
  year = {2005},
  volume = {3379},
  pages = {289-298},
  url = {http://dblp.uni-trier.de/db/conf/birthday/neuhold2005.html#NiedereeSMHR05}
}
Risse, T.
Hemmje, M.; Niederée, C. & Risse, T. (Eds.)
An Overview on Automatic Capacity Planning.
From Integrated Publication and Information Systems to Virtual Information and Knowledge Environments, Springer , Vol. 3379, 1-10, 2005
BibTeX:
@inproceedings{conf/birthday/Risse05,
  author = {Risse, Thomas},
  editor = {Hemmje, Matthias and Niederée, Claudia and Risse, Thomas},
  title = {An Overview on Automatic Capacity Planning.},
  booktitle = {From Integrated Publication and Information Systems to Virtual Information and Knowledge Environments},
  publisher = {Springer},
  year = {2005},
  volume = {3379},
  pages = {1-10},
  url = {http://dblp.uni-trier.de/db/conf/birthday/neuhold2005.html#Risse05}
}
Knezevic, P.; Wombacher, A. & Risse, T.
Enabling High Data Availability in a DHT.
DEXA Workshops, IEEE Computer Society , 363-367, 2005
BibTeX:
@inproceedings{conf/dexaw/KnezevicWR05,
  author = {Knezevic, Predrag and Wombacher, Andreas and Risse, Thomas},
  title = {Enabling High Data Availability in a DHT.},
  booktitle = {DEXA Workshops},
  publisher = {IEEE Computer Society},
  year = {2005},
  pages = {363-367},
  url = {http://dblp.uni-trier.de/db/conf/dexaw/dexaw2005.html#KnezevicWR05}
}
Risse, T. & Knezevic, P.
A Self-organizing Data Store for Large Scale Distributed Infrastructures.
ICDE Workshops, , 1211, 2005
BibTeX:
@inproceedings{conf/icde/RisseK05,
  author = {Risse, Thomas and Knezevic, Predrag},
  title = {A Self-organizing Data Store for Large Scale Distributed Infrastructures.},
  booktitle = {ICDE Workshops},
  year = {2005},
  pages = {1211},
  url = {http://www.l3s.de/~risse/pub/Risse_SMDB2005_final.pdf}
}
Neuhold, E. J.; Risse, T.; Wombacher, A.; Niederée, C. & Mahleko, B.
Meersman, R.; Tari, Z.; Hacid, M.-S.; Mylopoulos, J.; Pernici, B.; Babaoglu, Ö.; Jacobsen, H.-A.; Loyall, J. P.; Kifer, M. & Spaccapietra, S. (Eds.)
Intelligent Web Service - From Web Services to .Plug&Play. Service Integration.
OTM Conferences (1), Springer , Vol. 3760, 18-19, 2005
BibTeX:
@inproceedings{conf/otm/NeuholdRWNM05,
  author = {Neuhold, Erich J. and Risse, Thomas and Wombacher, Andreas and Niederée, Claudia and Mahleko, Bendick},
  editor = {Meersman, Robert and Tari, Zahir and Hacid, Mohand-Said and Mylopoulos, John and Pernici, Barbara and Babaoglu, Özalp and Jacobsen, Hans-Arno and Loyall, Joseph P. and Kifer, Michael and Spaccapietra, Stefano},
  title = {Intelligent Web Service - From Web Services to .Plug&Play. Service Integration.},
  booktitle = {OTM Conferences (1)},
  publisher = {Springer},
  year = {2005},
  volume = {3760},
  pages = {18-19},
  url = {http://dblp.uni-trier.de/db/conf/otm/otm2005-1c.html#NeuholdRWNM05}
}
Hemmje, M.; Niederee, C. & Risse, T.
From Integrated Publication and Information Systems to Information and Knowledge Environments : Essays Dedicated to Erich J. Neuhold on the Occasion of His 65th Birthday
Springer-Verlag. , 2005
BibTeX:
@book{hemmje2005integrated,
  author = {Hemmje, Matthias and Niederee, Claudia and Risse, Thomas},
  title = {From Integrated Publication and Information Systems to Information and Knowledge Environments : Essays Dedicated to Erich J. Neuhold on the Occasion of His 65th Birthday},
  publisher = {Springer-Verlag.},
  year = {2005},
  url = {http://link.springer.com/book/10.1007/b105978}
}
Risse, T.; Knezevic, P.; Meghini, C.; Hecht, R. & Basile, F.
The BRICKS Infrastructure - An Overview
75th Conference on Electronic Imaging, the Visual Arts & Beyond (EVA 2005), Moscow, , 2005
BibTeX:
@inproceedings{risse2005bricks,
  author = {Risse, Thomas and Knezevic, Predrag and Meghini, Carlo and Hecht, Robert and Basile, Fiore},
  title = {The BRICKS Infrastructure - An Overview },
  booktitle = {75th Conference on Electronic Imaging, the Visual Arts & Beyond (EVA 2005), Moscow},
  year = {2005},
  number = {December}
}

2004

Knezevic, P.; Mehta, B.; Niederée, C.; Risse, T.; Thiel, U. & Frommholz, I.
Türker, C.; Agosti, M. & Schek, H.-J. (Eds.)
Supporting Information Access in Next Generation Digital Library Architectures.
DELOS Workshop: Digital Library Architectures - LNCS Volume, Springer , Vol. 3664, 207-222, 2004
BibTeX:
@inproceedings{conf/delos/KnezevicMNRTF04,
  author = {Knezevic, Predrag and Mehta, Bhaskar and Niederée, Claudia and Risse, Thomas and Thiel, Ulrich and Frommholz, Ingo},
  editor = {Türker, Can and Agosti, Maristella and Schek, Hans-Jörg},
  title = {Supporting Information Access in Next Generation Digital Library Architectures.},
  booktitle = {DELOS Workshop: Digital Library Architectures - LNCS Volume},
  publisher = {Springer},
  year = {2004},
  volume = {3664},
  pages = {207-222},
  url = {http://dblp.uni-trier.de/db/conf/delos/delos2004lncs.html#KnezevicMNRTF04}
}
Risse, T.; Knezevic, P. & Wombacher, A.
P2P Evolution: From File-sharing to Decentralized Workflows.
it - Information Technology, , Vol. 46, 193-199, 2004
BibTeX:
@article{journals/it/RisseKW04,
  author = {Risse, Thomas and Knezevic, Predrag and Wombacher, Andreas},
  title = {P2P Evolution: From File-sharing to Decentralized Workflows.},
  journal = {it - Information Technology},
  year = {2004},
  volume = {46},
  number = {4},
  pages = {193-199},
  url = {http://dblp.uni-trier.de/db/journals/it/it46.html#RisseKW04}
}
Risse, T.; Aberer, K.; Wombacher, A.; Surridge, M. & Taylor, S.
Configuration of distributed message converter systems.
Performance Evaluation, Elsevier , Vol. 58, 43-80, 2004
Abstract: Finding a configuration of a distributed system satisfying performance goals is a complex search problem that involves many design parameters, like hardware selection, job distribution and process configuration. Performance models are a powerful tool to analyse potential system configurations, however, their evaluation is expensive, such that only a limited number of possible configurations can be evaluated. In this paper we present a systematic method to find a satisfactory configuration with feasible effort, based on a two-step approach. First, performing a queuing network analysis a hardware configuration is determined and then a software configuration is incrementally optimized by simulating Layered Queuing Network models. We applied this method to the design of performant EDI converter systems in the financial domain, where increasing message volumes need to be handled due to the growing importance of B2B interaction.
BibTeX:
@article{journals/pe/RisseAWST04,
  author = {Risse, Thomas and Aberer, Karl and Wombacher, Andreas and Surridge, Mike and Taylor, Stephen},
  title = {Configuration of distributed message converter systems.},
  journal = {Performance Evaluation},
  publisher = {Elsevier},
  year = {2004},
  volume = {58},
  number = {1},
  pages = {43-80},
  url = {http://www.l3s.de/~risse/pub/peva04.pdf},
  doi = {10.1016/j.peva.2004.05.004}
}
Kirchner, H.; Krummenacher, R.; Edwards may, D. & Risse, T.
Abstract A Location-aware Prefetching Mechanism
4th International Network Conference (INC 2004), University of Plymouth, Plymouth, ISBN 1-84102-125-3, , 453-460, 2004
BibTeX:
@inproceedings{Kirchner_abstracta,
  author = {Kirchner, Holger and Krummenacher, Reto and Edwards may, David and Risse, Thomas},
  title = {Abstract A Location-aware Prefetching Mechanism},
  booktitle = {4th International Network Conference (INC 2004), University of Plymouth, Plymouth, ISBN 1-84102-125-3},
  year = {2004},
  pages = {453-460}
}
Aberer, K.; Cudré-Mauroux, P.; Ouksel, A.; Catarci, T.; Hacid, M.-S.; Illarramendi, A.; Kashyap, V.; Mecella, M.; Mena, E.; Neuhold, E.; De Troyer, O.; Risse, T.; Scannapieco, M.; Saltor, F.; de Santis, L.; Spaccapietra, S.; Staab, S. & Studer, R.
Lee, Y.; Li, J.; Whang, K.-Y. & Lee, D. (Eds.)
Emergent Semantics Principles and Issues
Database Systems for Advanced Applications, Springer , Vol. 2973, 25-38, 2004
Abstract: Information and communication infrastructures underwent a rapid and extreme decentralization process over the past decade: From a world of statically and partially connected central servers rose an intricate web of millions of information sources loosely connecting one to another. Today, we expect to witness the extension of this revolution with the wide adoption of meta-data standards like RDF or OWL underpinning the creation of a semantic web. Again, we hope for global properties to emerge from a multiplicity of pair-wise, local interactions, resulting eventually in a self-stabilizing semantic infrastructure. This paper represents an effort to summarize the conditions under which this revolution would take place as well as an attempt to underline its main properties, limitations and possible applications.
BibTeX:
@incollection{springerlink:10.1007/978-3-540-24571-1_2,
  author = {Aberer, Karl and Cudré-Mauroux, Philippe and Ouksel, Aris and Catarci, Tiziana and Hacid, Mohand-Said and Illarramendi, Arantza and Kashyap, Vipul and Mecella, Massimo and Mena, Eduardo and Neuhold, Erich and De Troyer, Olga and Risse, Thomas and Scannapieco, Monica and Saltor, Fèlix and de Santis, Luca and Spaccapietra, Stefano and Staab, Steffen and Studer, Rudi},
  editor = {Lee, YoonJoon and Li, Jianzhong and Whang, Kyu-Young and Lee, Doheon},
  title = {Emergent Semantics Principles and Issues},
  booktitle = {Database Systems for Advanced Applications},
  publisher = {Springer},
  year = {2004},
  volume = {2973},
  pages = {25-38},
  url = {http://dx.doi.org/10.1007/978-3-540-24571-1_2},
  doi = {10.1007/978-3-540-24571-1_2}
}
Aberer, K.; Catarci, T.; Cudré-Mauroux, P.; Dillon, T.; Grimm, S.; Hacid, M.-S.; Illarramendi, A.; Jarrar, M.; Kashyap, V.; Mecella, M.; Mena, E.; Neuhold, E. J.; Ouksel, A. M.; Risse, T.; Scannapieco, M.; Saltor, F.; Santis, L. d.; Spaccapietra, S.; Staab, S.; Studer, R. & De Troyer, O.
Bouzeghoub, M.; Goble, C.; Kashyap, V. & Spaccapietra, S. (Eds.)
Emergent Semantics Systems
Semantics of a Networked World, Springer , Vol. 3226, 14-43, 2004
Abstract: With new standards like RDF or OWL paving the way for the much anticipated Semantic Web, a new breed of very large scale semantic systems is about to appear. Traditional semantic reconciliation techniques, dependent upon shared vocabularies or global ontologies, cannot be used in such open and dynamic environments. Instead, new heuristics based on emerging properties and local consensuses have to be exploited in order to foster semantic interoperability in the large. In this paper, we outline the main differences between traditional semantic reconciliation methods and these new heuristics. Also, we characterize the resulting emergent semantics systems and provide a couple of hints vis-à-vis their potential applications.
BibTeX:
@incollection{springerlink:10.1007/978-3-540-30145-5_2,
  author = {Aberer, Karl and Catarci, Tiziana and Cudré-Mauroux, Philippe and Dillon, Tharam and Grimm, Stephan and Hacid, Mohand-Said and Illarramendi, Arantza and Jarrar, Mustafa and Kashyap, Vipul and Mecella, Massimo and Mena, Eduardo and Neuhold, Erich J. and Ouksel, Aris M. and Risse, Thomas and Scannapieco, Monica and Saltor, Fèlix and Santis, Luca de and Spaccapietra, Stefano and Staab, Steffen and Studer, Rudi and De Troyer, Olga},
  editor = {Bouzeghoub, Mokrane and Goble, Carole and Kashyap, Vipul and Spaccapietra, Stefano},
  title = {Emergent Semantics Systems},
  booktitle = {Semantics of a Networked World},
  publisher = {Springer},
  year = {2004},
  volume = {3226},
  pages = {14-43},
  doi = {10.1007/978-3-540-30145-5_2}
}

2003

Wombacher, A.; Mahleko, B. & Risse, T.
Classification of Ad hoc Multi-lateral Collaborations Based on Local Workflow Models.
SAC, ACM , 1185-1190, 2003
BibTeX:
@inproceedings{conf/sac/WombacherMR03,
  author = {Wombacher, Andreas and Mahleko, Bendick and Risse, Thomas},
  title = {Classification of Ad hoc Multi-lateral Collaborations Based on Local Workflow Models.},
  booktitle = {SAC},
  publisher = {ACM},
  year = {2003},
  pages = {1185-1190},
  url = {http://www.l3s.de/~risse/pub/P2003-03.pdf}
}
Risse, T. & Knezevic, P.
Data Storage Requirements for the Service Oriented Computing.
SAINT Workshops, IEEE Computer Society , 67-72, 2003
BibTeX:
@inproceedings{conf/saint/RisseK03,
  author = {Risse, Thomas and Knezevic, Predrag},
  title = {Data Storage Requirements for the Service Oriented Computing.},
  booktitle = {SAINT Workshops},
  publisher = {IEEE Computer Society},
  year = {2003},
  pages = {67-72},
  url = {http://www.l3s.de/~risse/pub/P2003-02.pdf}
}

2002

Meissner, A.; Luckenbach, T.; Risse, T.; Kirste, T. & Kirchner, H.
Design Challenges for an Integrated Disaster Management Communication and Information System
DIREN 2002 - 1st IEEE Workshop on Disaster Recovery Networks; New York, 2002, , 2002
BibTeX:
@inproceedings{meissner2002design,
  author = {Meissner, Andreas and Luckenbach, Thomas and Risse, Thomas and Kirste, Thomas and Kirchner, Holger},
  title = {Design Challenges for an Integrated Disaster Management Communication and Information System },
  booktitle = {DIREN 2002 - 1st IEEE Workshop on Disaster Recovery Networks; New York, 2002},
  year = {2002},
  url = {http://www.l3s.de/~risse/pub/P2002-01.pdf}
}

2001

Aberer, K.; Risse, T. & Wombacher, A.
Configuration of Distributed Message Converter Systems using Performance Modeling
Conference proceedings of the 2001 IEEE International Performance, Computing, and Communications Conference : Phoenix, Arizona, U.S.A., April 4 - 6, 2001, IEEE Service Center , 2001
BibTeX:
@inproceedings{noauthororeditor2001conference,
  author = {Aberer, Karl and Risse, Thomas and Wombacher, Andreas},
  title = {Configuration of Distributed Message Converter Systems using Performance Modeling },
  booktitle = {Conference proceedings of the 2001 IEEE International Performance, Computing, and Communications Conference : Phoenix, Arizona, U.S.A., April 4 - 6, 2001},
  publisher = {IEEE Service Center},
  year = {2001},
  url = {http://www.l3s.de/~risse/pub/P2001-02.pdf}
}
Risse, T.; Wombacher, A.; Surridge, M.; Taylor, S. & Aberer, K.
Online Scheduling in Distributed Message Converter Systems
Proc. of PDCS 2001 - Parallel and Distributed Computing and Systems; IASTED, Anaheim, , 177-184, 2001
BibTeX:
@inproceedings{risse2001online,
  author = {Risse, Thomas and Wombacher, Andreas and Surridge, Mike and Taylor, Steve and Aberer, Karl},
  title = {Online Scheduling in Distributed Message Converter Systems},
  booktitle = {Proc. of PDCS 2001 - Parallel and Distributed Computing and Systems; IASTED, Anaheim},
  year = {2001},
  pages = {177-184},
  url = {http://www.l3s.de/~risse/pub/pdcs2001.pdf}
}

2000

Risse, T.; Wombacher, A. & Aberer, K.
Hansen, H. R.; Bichler, M. & Mahrer, H. (Eds.)
Efficient Processing of Voluminous EDI Documents.
ECIS, , 343-350, 2000
BibTeX:
@inproceedings{conf/ecis/RisseWA00,
  author = {Risse, Thomas and Wombacher, Andreas and Aberer, Karl},
  editor = {Hansen, Hans Robert and Bichler, Martin and Mahrer, Harald},
  title = {Efficient Processing of Voluminous EDI Documents.},
  booktitle = {ECIS},
  year = {2000},
  pages = {343-350},
  url = {http://www.l3s.de/~risse/pub/P2000-05.pdf}
}

1998

Risse, T.; Leissler, M.; Hemmje, M.; Aberer, K. & Klement, T.
Supporting dynamic information visualization with VRML and databases.
Workshop on New Paradigms in Information Visualization and Manipulation, ACM , 69-72, 1998
BibTeX:
@inproceedings{conf/npiv/RisseLHAK98,
  author = {Risse, Thomas and Leissler, Martin and Hemmje, Matthias and Aberer, Karl and Klement, Thomas},
  title = {Supporting dynamic information visualization with VRML and databases.},
  booktitle = {Workshop on New Paradigms in Information Visualization and Manipulation},
  publisher = {ACM},
  year = {1998},
  pages = {69-72},
  url = {http://dblp.uni-trier.de/db/conf/npiv/npiv1998.html#RisseLHAK98}
}
Klement, T.; Risse, T.; Hemmje, M.; Leissler, M. & Malsy, M.
Online Information Services for Trade Fairs and Congresses based on Multimedia Databases
ERCMI News, , Vol. 35, 21-23, 1998
BibTeX:
@inproceedings{Klementetal:98b,
  author = {Klement, T. and Risse, T. and Hemmje, M. and Leissler, M. and Malsy, M.},
  title = {Online Information Services for Trade Fairs and Congresses based on Multimedia Databases},
  booktitle = {ERCMI News},
  year = {1998},
  volume = {35},
  pages = {21-23}
}

1997

Risse, T. & Hemmje, M.
Entwurf und Implementierung einer VRML Bibliothek fuer ein objektrelationales Datenbanksystem auf der Basis des VRML 2.0 Standards
GMD-Studien, , 1997
BibTeX:
@article{risse1997entwurf,
  author = {Risse, Thomas and Hemmje, Matthias},
  title = {Entwurf und Implementierung einer VRML Bibliothek fuer ein objektrelationales Datenbanksystem auf der Basis des VRML 2.0 Standards },
  journal = {GMD-Studien},
  year = {1997},
  number = {324}
}