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@INCOLLECTION{BaSS10,
  author = {Baumann, Stephan and Schirru, Rafael and Streit, Bernhard},
  title = {Towards a Storytelling Approach for Novel Artist Recommendations},
  booktitle = {Adaptive Multimedia Retrieval. Context, Exploration, and Fusion},
  publisher = {Springer Berlin / Heidelberg},
  year = {2011},
  editor = {Detyniecki, Marcin and Knees, Peter and Nürnberger, Andreas and Schedl,
	Markus and Stober, Sebastian},
  volume = {6817},
  series = {Lecture Notes in Computer Science},
  pages = {1-15},
  note = {10.1007/978-3-642-27169-4_1},
  affiliation = {German Research Center for Artificial Intelligence, Alt-Moabit 91c,
	10559 Berlin, Germany},
  isbn = {978-3-642-27168-7},
  keyword = {Computer Science},
  url = {http://dx.doi.org/10.1007/978-3-642-27169-4_1}
}

@INPROCEEDINGS{MeKS08,
  author = {Martin Memmel and Michael Kockler and Rafael Schirru},
  title = {Providing Multi Source Tag Recommendations in a Social Resource Sharing
	Platform},
  booktitle = {Proceedings of I-MEDIA '08},
  year = {2008},
  editor = {Hermann Maurer and Frank Kappe and Werner Haas and Klaus Tochtermann},
  pages = {226--233},
  month = {September},
  organization = {Know-Center, Graz},
  publisher = {Journal of Universal Computer Science},
  note = {ISSN 0948-695x},
  abstract = {In today's information environments, tagging is widely used to provide
	information about arbitrary types of digital resources.This information
	is created by end users with different motivations and for different
	kinds of purposes. When aiming to support users in the tagging process,
	these differences play an important role. This paper discusses several
	approaches to generate tag recommendations, and a prototypical recommender
	system for the social resource sharing platform ALOE will be presented.
	This interactive system allows users to control the generation of
	the recommendations by selecting the sources to be used as well as
	their impact. The component was introduced at DFKI, and a first evaluation
	showed that the recommender component was considered as helpful by
	a majority of users.},
  owner = {memmel}
}

@ARTICLE{MeKS09,
  author = {Martin Memmel and Michael Kockler and Rafael Schirru},
  title = {Providing Multi Source Tag Recommendations in a Social Resource Sharing
	Platform},
  journal = {Journal of Universal Computer Science},
  year = {2009},
  volume = {15},
  pages = {678--691},
  number = {3},
  note = {\url{http://www.jucs.org/jucs_15_3/providing_multi_source_tag}},
  abstract = {In today's information environments, tagging is widely used to provide
	information about arbitrary types of digital resources. This information
	is usually created by end users with different motivations and for
	different kinds of purposes. When aiming to support users in the
	tagging process, these differences play an important role. In this
	paper several approaches to generate tag recommendations are discussed,
	and a prototypical recommender system for the social resource sharing
	platform ALOE is presented. This interactive system allows users
	to control the generation of the recommendations by selecting the
	sources to be used as well as their impact. The component was introduced
	at DFKI, and a first evaluation showed that the recommender component
	was considered as helpful by a majority of users.},
  owner = {memmel},
  timestamp = {2009.05.19},
  url = {\url{http://www.jucs.org/jucs_15_3/providing_multi_source_tag}}
}

@INPROCEEDINGS{MemmelSchirru07,
  author = {Martin Memmel and Rafael Schirru},
  title = {Sharing Digital Resources and Metadata for Open and Flexible Knowledge
	Management Systems},
  booktitle = {Proceedings of the 7th International Conference on Knowledge Management
	(I-KNOW)},
  year = {2007},
  editor = {Klaus Tochtermann and Herrmann Maurer},
  pages = {41--48},
  month = {September},
  organization = {Know-Center, Graz},
  publisher = {Journal of Universal Computer Science},
  note = {ISSN 0948-695x},
  owner = {memmel},
  timestamp = {2007.09.12}
}

@INPROCEEDINGS{MemmelSchirru07b,
  author = {Martin Memmel and Rafael Schirru},
  title = {ALOE - A Socially Aware Learning Resource and Metadata Hub},
  booktitle = {Proceedings of the EC-TEL 2007 Poster Session},
  year = {2007},
  editor = {Martin Wolpers and Ralf Klamma and Erik Duval},
  publisher = {CEUR workshop proceedings},
  note = {ISSN 1613-0073},
  owner = {memmel},
  url = {http://ceur-ws.org/Vol-280}
}

@INPROCEEDINGS{MemmelSchirruTomadakiWolpers+08,
  author = {Martin Memmel and Rafael Schirru and Martin Wolpers and Elia Tomadaki},
  title = {Towards the Combined Use of Metadata to Improve the Learning Experience},
  booktitle = {Proceedings of the The 8th IEEE International Conference on Advanced
	Learning Technologies},
  year = {2008},
  editor = {Paloma Díaz and Kinshuk and Ignacio Aedo and Eduardo Mora},
  pages = {930--932},
  month = {July},
  organization = {IEEE},
  publisher = {IEEE Conference Publishing Services},
  note = {ISBN 978-0-7695-3167-0},
  abstract = {Today, users do not only access learning resources stored in traditional
	repositories. They use any kind of digital resource, often generated
	in the context of social media platforms. When trying to improve
	the learning experience, it is crucial that all resources that are
	potentially useful are accessible; and that the resources are described
	in a way that allows to identify what is relevant. We suggest enriching
	learning resource descriptions by combining metadata generated by
	experts, user interactions, observation components and machine-generated
	metadata. We give a brief example of the compilation of rich metadata
	sets by integrating the social media platform ALOE with resources
	and metadata from the Ariadne knowledge pool and public FlashMeeting
	replays.},
  owner = {memmel}
}

@INPROCEEDINGS{POS+10,
  author = {Fernanda Pimenta and Darko Obradovic and Rafael Schirru and Stephan
	Baumann and Andreas Dengel},
  title = {Automatic Sentiment Monitoring of Specific Topics in the Blogosphere},
  booktitle = {Workshop on Dynamic Networks and Knowledge Discovery (DyNaK 2010)},
  year = {2010},
  month = {September},
  url = {http://kdd.di.unito.it/DyNaK2010/}
}

@INPROCEEDINGS{Rostanin2006,
  author = {Oleg Rostanin and Rafael Schirru},
  title = {Identification of User's Learning Goals in Workflows},
  booktitle = {Proceedings of the Joint International Workshop on Professional Learning,
	Competence Development and Knowledge Management - LOKMOL and L3NCD
	held in conjunction with the 1st European Conference on Technology
	Enhanced Learning},
  year = {2006},
  pages = {53-58},
  month = {October},
  owner = {schirru},
  timestamp = {2007.09.14},
  url = {http://cnm.open.ac.uk/projects/ectel06/pdfs/ECTEL06WS68d.pdf}
}

@INPROCEEDINGS{Schi10,
  author = {Schirru, Rafael},
  title = {Topic-based recommendations in enterprise social media sharing platforms},
  booktitle = {RecSys '10: Proceedings of the fourth ACM conference on Recommender
	systems},
  year = {2010},
  pages = {369--372},
  address = {New York, NY, USA},
  publisher = {ACM},
  comment = {checked, from ACM},
  doi = {http://doi.acm.org/10.1145/1864708.1864793},
  isbn = {978-1-60558-906-0},
  location = {Barcelona, Spain},
  owner = {schirru},
  timestamp = {2010.10.01}
}

@MASTERSTHESIS{Schirru2007,
  author = {Rafael Schirru},
  title = {Conception and Implementation of an Open and Adaptable Environment
	for Multidimensional Learning Objects},
  school = {University of Kaiserslautern},
  year = {2007},
  abstract = {Nowadays, knowledge is constantly changing and it is becoming faster
	and more overwhelmingly available. As a consequence lifelong learning
	is a requirement which people have to meet in their working as well
	as their private life. \elearning systems are likely to support lifelong
	learning. 
	
	The target of the ALOE project which is currently conducted at the
	German Research Center for Artificial Intelligence is the implementation
	of a brokerage service for all sorts of digital learning content
	and its associated metadata. Its aim is to offer efficient information
	retrieval as well as personalized content provision. Further functionalities
	of social software are intended to connect users and that way enable
	interaction and collaboration.
	
	This diploma thesis starts with an introduction to \elearning and
	Web 2.0 as this is the context in which the ALOE system has been
	developed. Next licensing models are introduced which are likely
	to safeguard intellectual property rights of content contributors.
	After having had a closer look at the project itself as well as related
	work, the use cases that had to be implemented are presented. The
	realization of the system will be described consecutively. For this
	purpose the management of metadata, the way of enabling adaptability
	and the means of implementation will be illustrated.},
  owner = {schirru},
  timestamp = {2007.09.14}
}

@INPROCEEDINGS{SBFD11,
  author = {Rafael Schirru and Stephan Baumann and Christian Freye and Andreas
	Dengel},
  title = {Towards Context-Sensitive Music Recommendations Using Multifaceted
	User Profiles},
  booktitle = {The Proceedings of the AES 42nd International Conference},
  year = {2011},
  pages = {54--59},
  month = {July},
  owner = {schirru},
  timestamp = {2011.07.28}
}

@INPROCEEDINGS{SBMD11,
  author = {Rafael Schirru and Stephan Baumann and Martin Memmel and Andreas
	Dengel},
  title = {Topic-Based Recommendations for Enterprise 2.0 Resource Sharing Platforms},
  booktitle = {Knowledge-Based and Intelligent Information and Engineering Systems},
  year = {2011},
  editor = {Andreas K\"{o}nig and Andreas Dengel and Knut Hinkelmann and Koichi
	Kise and Robert J. Howlett and Lakhmi C. Jain},
  volume = {6881},
  series = {Lecture Notes in Computer Science},
  pages = {495--504},
  publisher = {Springer},
  isbn = {978-3-642-23850-5},
  location = {Heidelberg},
  owner = {rafaelschirru},
  timestamp = {2011.09.28}
}

@ARTICLE{SBMD10,
  author = {R. Schirru and S. Baumann and M. Memmel and A. Dengel},
  title = {Extraction of Contextualized User Interest Profiles in Social Sharing
	Platforms},
  journal = {Journal of Universal Computer Science},
  year = {2010},
  volume = {16},
  pages = {2196--2213},
  number = {16},
  owner = {schirru},
  timestamp = {2010.11.25}
}

@INPROCEEDINGS{SOBW10,
  author = {Rafael Schirru and Darko Obradovic and Stephan Baumann and Peter
	Wortmann},
  title = {Domain-Specific Identification of Topics and Trends in the Blogosphere},
  booktitle = {Advances in Data Mining. Applications and Theoretical Aspects, 10th
	Industrial Conference, ICDM 2010, Berlin, Germany, July 12-14, 2010.
	Proceedings},
  year = {2010},
  editor = {Petra Perner},
  volume = {6171},
  series = {LNAI},
  pages = {490-504},
  address = {Berlin, Germany},
  month = {July},
  publisher = {Springer}
}

@ARTICLE{WMK+09,
  author = {Martin Wolpers and Martin Memmel and Joris Klerkx and Gonzalo Parra
	and Bram Vandeputte and Erik Duval and Rafael Schirru and Katja Niemann},
  title = {Bridging Repositories to form the MACE Experience},
  journal = {New Review of Information Networking},
  year = {2009},
  volume = {14},
  pages = {102--116},
  number = {2},
  month = {November},
  abstract = {This paper reports on our experiences in bridging learning repositories
	on architecture within the MACE system. In order to make access to
	architectural learning resources simple and easy for students and
	teachers, we rely heavily on standards. We discuss the concepts behind
	the MACE system, describe related problems, and how we solve them
	by employing and modifying standards from the computer science and
	architecture. By bringing together numerous heterogeneous repositories,
	combining and relating metadata of their learning resources and incorporating
	social community support, we enable open access while still respecting
	organizational and legislative issues of all participating repositories.},
  doi = {10.1080/13614570903359423},
  url = {http://www.informaworld.com/smpp/content~db=jour~content=a917249819}
}

@INPROCEEDINGS{WMS+09,
  author = {Martin Wolpers and Martin Memmel and Hans-Christian Schmitz and Martin
	Friedrich and Marco Jahn and Rafael Schirru},
  title = {Usage metadata based support for learning activity reflection},
  booktitle = {Proceedings of I-KNOW '09},
  year = {2009},
  editor = {Klaus Tochtermann and Hermann Maurer},
  pages = {354--359},
  month = {September},
  organization = {Know-Center, Graz},
  publisher = {Journal of Universal Computer Science},
  note = {ISBN 978-3-85125060-2},
  abstract = {An important activity for the learner while learning is the reflection
	on the learning path and strategy. So far, not many tools provide
	an automatic support for the reflection on the learning activities.
	Here, we describe our approach to enable reflection with the help
	of usage and contextual metadata. We describe how we capture usage
	information and provide algorithms like the identification of similar
	users, contents and tools for reflection like a learner Zeitgeist
	application or the elicitation of learning paths.}
}

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