% Year: 2007
% Encoding: utf-8
@InProceedings{VanDeursen2007,
  author = {Deursen, Davy Van and Bruyne, Sarah De and Lancker, Wim Van and Neve, Wesley De and Schrijver, Davy De and Hellwagner, Hermann and Walle, Rik Van de},
  booktitle = {IEEE International Symposium on Multimedia 2007 (ISM2007)},
  title = {MuMiVA: A Multimedia Delivery Platform using Format-agnostic, XML-driven Content Adaptation},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Bulterman, Dick and Mori, Kinji and Tsai, Jeffrey J P},
  month = dec,
  pages = {131-138},
  publisher = {IEEE},
  abstract = {Due to the increasing heterogeneity in the current multimedia landscape, the delivery of multimedia content has become an important issue today. This heterogeneity is not only reflected by a plethora of different usage environments, but also by the presence of multiple (scalable) coding formats. Therefore, format-independent adaptation engines have to be used within a multimedia delivery platform, which are able to adapt the multimedia content according to a certain usage environment, independent of the underlying coding format of the content. By relying on automatically created textual descriptions of the highlevel syntax of binary media resources, a format-independent adaptation engine can be build. MPEG-21 generic Bitstream Syntax Schema (gBS Schema) is a tool that is part of the MPEG-21 Multimedia Framework. It enables the use of generic Bitstream Syntax Descriptions (gBSDs), i.e., textual descriptions in XML, to steer the adaptation of a binary media resource, using format-independent adaptation logic. In this paper, we address the design and performance evaluation of a multimedia delivery platform that relies on gBS Schema-driven adaptation engines. This platform is called MuMiVA; it is a fully integrated, extensible platform for multimedia delivery in heterogeneous usage environments, using streaming technologies. To demonstrate the flexibility of our multimedia delivery platform, we discuss the functioning of two different applications (i.e., exploitation of temporal scalability and shot selection) applied to two different coding formats (i.e., MPEG-4 Visual and H.264/AVC). Keywords— Content adaptation, Content delivery, MPEG-21 gBS Schema, XML transformations.},
  isbn10 = {0769530583},
  isbn13 = {978-0769530581},
  keywords = {0769530583},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/MuMiVA.pdf},
  talktype = {none},
  url = {http://www.ism2007.ncu.edu.tw/}
}
@InProceedings{Szkaliczki2007,
  author = {Szkaliczki, Tibor and Karpati, Peter and Goldschmidt, Balazs},
  booktitle = {Proceedings of the 5th Hungarian-Japanese Symposium on Discrete Mathematics and Its Applications},
  title = {Two combinatorial optimisation problems in multimedia systems},
  year = {2007},
  address = {NA},
  editor = {Tokuyama, T and Nishizeki, T and Recski, A and Shioura, A},
  month = apr,
  pages = {211-218},
  publisher = {NA},
  language = {EN},
  talktype = {none}
}
@InProceedings{Strohmaier2007,
  author = {Strohmaier, Markus and Lux, Mathias and Granitzer, Michael and Scheir, P and Liaskos, S and Yu, E},
  booktitle = {WISE'07 Proceedings of the 2007 international conference on Web information systems engineering},
  title = {How Do Users Express Goals on the Web? - An Exploration of Intentional Structures in Web Search},
  year = {2007},
  address = {Berlin, Heidelberg, New York},
  editor = {Weske, M and Hacid, MS and Godart, C},
  month = nov,
  pages = {67-78},
  publisher = {Springer},
  series = {LNCS 4832},
  abstract = {Many activities on the web are driven by high-level goals of users, such as “plan a trip” or “buy some product”. In this paper, we are interested in exploring the role and structure of users’ goals in web search. We want to gain insights into how users express goals, and how their goals can be represented in a semi-formal way. This paper presents results from an exploratory study that focused on analyzing selected search sessions from a search engine log. In a detailed example, we demonstrate how goal-oriented search can be represented and understood as a traversal of goal graphs. Finally, we provide some ideas on how to construct large-scale goal graphs in a semi-algorithmic, collaborative way. We conclude with a description of a series of challenges that we consider to be important for future research.},
  issn = {0302-974},
  language = {EN},
  talktype = {none},
  url = {http://www.springerlink.com/content/w4067u12nu7375r4/?p=61bfd2d5edf24a6bbccfd9434ff4224f&pi=7}
}
@InProceedings{Spielvogel2007b,
  author = {Spielvogel, Christian and Böszörmenyi, Laszlo},
  booktitle = {Second Interantional Workshop on Semantic Media Adaptation and Personalization},
  title = {Quality-of-Service Based Video Replication},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Mylonas, P and Wallace, M and Angelides, M},
  month = dec,
  pages = {21-26},
  publisher = {IEEE},
  abstract = {An approach for quality-of-service based replica management in a proxy-to-proxy network is presented. Management decisions are based on a metrics called replication affinity. Replication affinity combines two other affinity metrics we call (1) placement affinity and (2) reallocation affinity. Placement affinity is used to find the best location to enable QoS based media delivery to future clients. Reallocation affinity is used to make media stream replacement decisions in case of insufficient storage space. Using our approach content replacements can be varied in the granularity. Granularity variations are possible for compressed videos by using multiple description coding (MDC). The effect of using replication affinity is evaluated by emulation experiments. For the experiments the network simulator NS-2 has been used.},
  doi = {10.1109/SMAP.2007.17},
  issn = {0-7695-3040-0},
  language = {EN},
  location = {Luxemburg},
  talkdate = {2007.12.18},
  talktype = {registered},
  url = {http://ieeexplore.ieee.org/xpl/tocresult.jsp?sortType%3Dasc_p_Sequence%26filter%3DAND%28p_IS_Number%3A4414370%29&refinements=4293320131&pageNumber=1&resultAction=REFINE}
}
@TechReport{Spielvogel2007a,
  author = {Spielvogel, Christian and Böszörmenyi, Laszlo},
  institution = {Institute of Information Technology ({ITEC}), Klagenfurt University},
  title = {Proxy Affinity},
  year = {2007},
  address = {Klagenfurt, Austria},
  month = jul,
  number = {TR/ITEC/07/2.06},
  language = {EN},
  pages = {13},
  url = {http://www.isys.uni-klu.ac.at/PDF/ChSp_LB_proxyAffinity.pdf}
}
@InProceedings{Spielvogel2007,
  author = {Spielvogel, Christian and Böszörmenyi, Laszlo},
  booktitle = {Parallel and Distributed Computing and Networks (PDCN 2007)},
  title = {Active and Passive Replication of Multimedia Content in a ProXy-to-ProXy Network (X2X)},
  year = {2007},
  address = {Calgary, Canada},
  editor = {Burkhart, H},
  month = feb,
  pages = {303-308},
  publisher = {ACTA Press},
  abstract = {Active and passive replication are powerful techniques to improve the quality of multimedia streaming. Most systems follow either the active or the passive approach. A well known example for active replication are Content Distribution Networks [8] that replicate data to predefined static locations. In contrast to that, P2P file sharing networks [2, 1] use passive replication where identical content is usually provided by different peers. We suggest a system that combines both techniques using Proxy Affinity, Request Affinity and Replication Affinity considering user preferences, user behaviour, hardware resources and networks capabilities.},
  issn = {978-0-88986-6},
  language = {EN},
  talktype = {none}
}
@InProceedings{Spaniol2007,
  author = {Spaniol, Marc and Klamma, Ralf and Lux, Mathias},
  booktitle = {Proceedings of I-Media ´07 and I-Semantics ´07},
  title = {Imagesemantics: User-Generated Metadata, Content Based Retrieval \& Beyond},
  year = {2007},
  address = {Graz, Austria},
  editor = {Tochtermann, Klaus and Haas, Werner and Kappe, F and Scharl, A},
  month = sep,
  pages = {41-48},
  publisher = {TU Graz \& Know Center},
  abstract = {With the advent of Web 2.0 technologies a new attitude towards processing contents in the Internet has emerged. Nowadays it is a lot easier to create, share and retrieve multimedia contents on the Web. However, with the increasing amount in contents retrieval becomes more challenging and often leads to inadequate search results. One main reason is that image clustering and retrieval approaches usually stick either solely to the images' low-level features or their user-generated tags (high-level features). However, this is frequently inappropriate since the "real" semantics of an image can only be derived from the combination of low-level and high-level features. Consequently, we investigated a more holistic view on image semantics based on a system called Imagesemantics. This system combines MPEG-7 descriptions for low-level content-based retrieval features and MPEG-7 keywords by a machine learning approach producing joined OWL rules. The rule base is used in Imagesemantics to improve retrieval results.},
  doi = {10.3217/jucs-014-10-1792},
  edition = {Volume 14, Issue 10},
  issn = {0948-695x},
  keywords = {MPEG-7, Web 2.0, social media platform, user-generated content},
  language = {EN},
  talktype = {none},
  url = {http://www.jucs.org/jucs_14_10}
}
@InProceedings{Schoeffmann2007b,
  author = {Schoeffmann, Klaus},
  booktitle = {Second Interantional Workshop on Semantic Media Adaptation and Personalization},
  title = {Towards Interactive Video Browsing},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Mylonas, Phivos and Wallace, Manolis and Angelides,Marios},
  month = dec,
  pages = {237-240},
  publisher = {IEEE},
  issn = {0-7695-3040-0},
  language = {EN},
  talktype = {none},
  url = {http://www.smap2007.org}
}
@InProceedings{Schoeffmann2007a,
  author = {Schoeffmann, Klaus and Fauster, Markus and Lampl, Oliver and Böszörmenyi, Laszlo},
  booktitle = {Euro-Par 2007 Parallel Processing},
  title = {An Evaluation of Parallelization Concepts for Baseline-Profile Compliant H.264/AVC Decoders},
  year = {2007},
  address = {Berlin, Heidelberg, New York},
  editor = {Kermarrec, Anne-Marie and Bougé, Luc and Priol, Thierry},
  month = aug,
  pages = {782-791},
  publisher = {Springer},
  series = {LNCS 4641},
  abstract = {Due to the increasing performance requirements of decoding H.264/AVC in HDTV or larger resolutions, new approaches are necessary to enable real-time processing. According to the current trend to parallel computation in all performance classes, decoding of AVC must be mapped to these architectures even though this is complicated by the increased complexity and many data dependencies in the codec. We propose and evaluate different ways of using multithreading to speed-up our .NET implemented decoder. While slice based approaches scale best, this is not a flexible approach because of the reliance on specially encoded streams. Functional partitioning and macroblock pipelining prove to be a good alternative for almost all evaluated videos.},
  issn = {0302-9743},
  language = {EN},
  location = {Rennes, France},
  talkdate = {2007.08.30},
  talktype = {registered},
  url = {http://www.springerlink.com/content/q14w6788rp777r63/}
}
@TechReport{Schoeffmann2007,
  author = {Schoeffmann, Klaus and Böszörmenyi, Laszlo},
  institution = {Institute of Information Technology ({ITEC}), Klagenfurt University},
  title = {Early Stage Shot Detection for H.264/AVC Bitstreams},
  year = {2007},
  address = {Klagenfurt, Austria},
  month = jul,
  number = {TR/ITEC/07/2.04},
  language = {EN},
  pages = {26},
  url = {https://www.itec.aau.at/~klschoef/papers/shotdetection.pdf}
}
@Article{Rollett2007,
  author = {Rollett, Herwig and Lux, Mathias and Strohmaier, Markus and Dösinger, Gisela and Tochtermann, Klaus},
  journal = {International Journal of Learning Technology (IJLT)},
  title = {The Web 2.0 way of learning with technologies},
  year = {2007},
  issn = {1477-8386},
  month = jan,
  pages = {87–107},
  volume = {Vol. 3, No. 1},
  abstract = {While there is a lot of hype around various concepts associated with the term Web 2.0 in industry, little academic research has so far been conducted on the implications of this new approach for the domain of education. Much of what goes by the name of Web 2.0 can, in fact, be regarded as new kinds of learning technologies, and can be utilised as such. This paper explains the background of Web 2.0, investigates the implications for knowledge transfer in general, and then discusses its particular use in eLearning contexts with the help of short scenarios. The main challenge in the future will be to maintain essential Web 2.0 attributes, such as trust, openness, voluntariness and self-organisation, when applying Web 2.0 tools in institutional contexts.},
  address = {Geneva, Switzerland},
  language = {EN},
  publisher = {Inderscience Publishers},
  url = {http://www.inderscience.com/browse/index.php?journalID=87}
}
@InProceedings{Ransburg2007a,
  author = {Ransburg, Michael and Timmerer, Christian and Hellwagner, Hermann and Devillers, Sylvain},
  booktitle = {WIAMIS 2007},
  title = {Design and Evaluation of a Metadata-Driven Adaptation Node},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Kompatsiaris, Yiannis and Avrithis, Yannis},
  month = jun,
  pages = {4},
  publisher = {IEEE},
  abstract = {MPEG-21 Digital Item Adaptation (DIA) allows for a media codec agnostic multimedia adaptation approach which enables the implementation of generic adaptation engines. However, DIA is optimized for static, server-based adaptation. In this paper we introduce novel mechanisms to extend the DIA approach towards dynamic and distributed scenarios. This facilitates the placement of generic adaptation nodes which perform media codec agnostic and dynamic adaptation anywhere along the content delivery path. To validate our work we implemented such an adaptation node and evaluate its performance.},
  issn = {0-7695-2818-X},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Design and Evaluation of a Metadata-Driven Adaptation Node.pdf},
  talktype = {none},
  url = {http://www.computer.org/proceedings/}
}
@InProceedings{Ransburg2007,
  author = {Ransburg, Michael and Devillers, Sylvain and Timmerer, Christian and Hellwagner, Hermann},
  booktitle = {Datenbanksysteme in Business, Technologie und Web (BTW 2007)},
  title = {Processing and Delivery of Multimedia Metadata for Multimedia Content Streaming},
  year = {2007},
  address = {Aachen},
  editor = {Jarke, Matthias and Seidl, Thomas and Quix, Christoph and Kensche, David and Conrad, St and Rahm, E and Klamma, Ralf and Kosch, Harald and Granitzer, Michael and Apel, S and Rosenmüller, M and Saake, Gunter and Spinczyk, Olaf},
  month = mar,
  pages = {117-138},
  publisher = {Verlag Mainz},
  abstract = {Today’s increasing variety of media data results in a great diversity of XMLbased metadata, which describes the media data on semantic or syntactic levels, in order to make it more accessible to the user. This metadata can be of considerable size, which leads to problems in streaming scenarios. Other than media data, XML metadata has no concept of “samples”, thus inhibiting streamed (and timed) processing, which is natural for media data. In order to address the challenges and requirements resulting from this situation, the concept of streaming instructions is introduced. In particular, streaming instructions address the problem of fragmenting metadata, associating media segments and metadata fragments, and streaming and processing them in a synchronized manner. This is achieved by enriching the metadata with additional attributes to describe media and XML properties. Alternatively, a style sheet approach provides the opportunity to dynamically set such streaming properties without actually modifying the XML description.},
  issn = {3861309297},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Processing and Delivery of Multimedia Metadata for Multimedia Content Streaming.pdf},
  talktype = {none}
}
@InProceedings{Prangl2007b,
  author = {Prangl, Martin and Bachlechner, Roland and Hellwagner, Hermann},
  booktitle = {2007 IEEE International Conference on Multimedia and Expo (ICME 2007)},
  title = {A hybrid recommender strategy for personalized utility-based cross-modal multimedia adaptation},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Zhuang, Xinhua and Gao, Wen},
  month = jul,
  pages = {1707-1710},
  publisher = {IEEE},
  abstract = {Enabling transparent and augmented use of multimedia content across a wide range of networks and devices is still a challenging task within the multimedia research community. Within multimedia frameworks, content adaptation is the core concept to overcome this issue. Most media adaptation engines targeting Universal Multimedia Access (UMA) scale the content w.r.t. terminal capabilities and network resource constraints and do not sufficiently consider user preferences. This paper focuses on a hybrid recommender technique for configuring a cross-modal utility model that guides adaptation of multimedia content. This approach additionally considers the user environment as well as demographic user data which leads to a personalized and increased multimedia experience. Based on a related adaptation decision technique we show how it is possible to offer a personalized adaptation for the individual user. We present a detailed evaluation of the approach based on results earned by subjective tests.},
  issn = {1-4244-1017-7},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/A hybrid recommender strategy for personalized utility-based cross-modal multimedia adaptation.pdf},
  talktype = {none}
}
@Article{Prangl2007a,
  author = {Prangl, Martin and Szkaliczki, Tibor and Hellwagner, Hermann},
  journal = {IEEE Transactions on Circuits and Systems for Video Technology},
  title = {A Framework for Utility-Based Multimedia Adaptation},
  year = {2007},
  issn = {1051-8215},
  month = jun,
  number = {6},
  pages = {719-728},
  volume = {17/2007},
  abstract = {Content adaptation is an important issue of multimedia frameworks in order to achieve universal multimedia access (UMA), i.e., to enable consumption of multimedia content independently of the given resource limitations, terminal capabilities, and user preferences. The digital item adaptation (DIA) standard, one of the core specifications of the MPEG-21 framework, supports content adaptation considering a wide range of networks, devices, and user preferences. Most adaptive multimedia frameworks targeting the UMA vision do not consider utility aspects in their adaptation decisions. This paper focuses on a generic semantic-based audio–visual utility model for DIA that aims to enhance the multimedia experience for the user. Our proposed model is able to take the semantics and the perceptual features of the content as well as the users' specific utility aspects into account. Based on a detailed analysis of these constraints, we will show how the model reacts on individual input data. For choosing the best adaptation decision considering resource limitations on client and server sides as well as network characteristics, we evaluate four algorithms for performing this adaptation decision taking task. We will discuss results according to some use case scenarios.},
  address = {Los Alamitos, CA, USA},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/A Framework for Utility-Based Multimedia Adaptation.pdf},
  publisher = {IEEE}
}
@InProceedings{Prangl2007,
  author = {Prangl, Martin and Hellwagner, Hermann},
  booktitle = {World of Wireless, Mobile and Multimedia Networks, 2007. WoWMoM 2007},
  title = {A framework for personalized utility-aware IP-based multimedia consumption},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Fleury, Eric and Karl, Holger},
  month = {jan},
  pages = {1-3},
  publisher = {IEEE},
  abstract = {Providing transparent and augmented use of multimedia content across a wide range of networks and devices is still a challenging task within the multimedia research community. Multimedia adaptation was figured out as a core concept to overcome this issue. Most multimedia adaptation engines for providing Universal Multimedia Access (UMA) scale the content under consideration of terminal capabilities and resource constraints but do not really consider individual user preferences. This paper introduces an adaptive multimedia framework which offers the user a personalized content variation for satisfying his/her individual utility preferences.},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/A framework for personalized utility-aware ip-based multimedia consumption.pdf},
  talktype = {none},
  url = {http://www.tml.tkk.fi/IEEE-wowmom/index.html}
}
@InProceedings{Oberbichler2007b,
  author = {Oberbichler, Alexander and Böszörmenyi, Laszlo},
  booktitle = {Proceedings of I-Know ´07 - 7th International Conference on Knowledge Management},
  title = {Printf in 4D User Interfaces},
  year = {2007},
  address = {Graz, Austria},
  editor = {Tochtermann, Klaus and Maurer, Hermann},
  month = sep,
  pages = {377-383},
  publisher = {TU Graz \& Know Center},
  language = {EN},
  talktype = {none}
}
@TechReport{Oberbichler2007a,
  author = {Oberbichler, Alexander and Böszörmenyi, Laszlo},
  institution = {Institute of Information Technology ({ITEC}), Klagenfurt University},
  title = {Framework for 4d user interfaces},
  year = {2007},
  address = {Klagenfurt, Austria},
  month = apr,
  number = {TR/ITEC/07/2.01},
  abstract = {Time- or history-management systems are implemented in a lot of existing applications. The visited web pages in browsers, the undoing list in nearly every editor or the recorded differences in version control systems are only some examples where time-based information plays an important role. Every kind of information (no matter if we talk about the last headlines in the newspaper or the last user inputs on the workstation) without an explicit date description is nearly useless. Due this fact we are wondering why no global time axis for recording general time-based information is integrated in today’s operating systems. We will introduce a time model to record all kinds of user actions and general time-based events as well. As a second part we will analyze how the visual output system can profit from such a global time axis as well. Up to now it takes a great effort to implement animated user interfaces and so they are rarely found on today’s software market. With the global conjunction of time it is possible to generate animations automatically for every kind of information. We explore the ways of using the time dimension for information presentation (for timely and not timely information as well). We will evaluate these so-called 4D user interfaces1 and introduce a programming model to take advantage of the time-dimension in multiple ways.},
  language = {EN},
  pages = {18}
}
@TechReport{Oberbichler2007,
  author = {Oberbichler, Alexander and Böszörmenyi, Laszlo},
  institution = {Institute of Information Technology ({ITEC}), Klagenfurt University},
  title = {Animated visualization in 4D UI},
  year = {2007},
  address = {Klagenfurt, Austria},
  month = apr,
  number = {TR/ITEC/07/2.02.},
  abstract = {The visualization of temporal information should not be seen as a special case. A lot of applications take already advantage of the time factor (e.g. capturing user events) but nearly all of them implement this feature completely proprietary. So why do we not embed the time as a ”first class citizen” in today’s operating systems that every application can use time based operations in an unified way. Such an invention would not only improve and standardize the capturing of temporal events but it would be of benefit for a temporal visualization system too. Within a 3D visualization space and a global time axis we introduce a printf4D() 1 method. With this method it is possible to display images, videos, text strings or any other kinds of information in an automatically animated way. As a first proposal we demonstrate this function in a ”flow of information” metaphor where information-objects are not displayed all at once but in a flowing manner over a certain period of time. Additionally we will show that printf4D() is not limited to temporal data. It can be extended automatically to any kind of static information.},
  language = {EN},
  pages = {12}
}
@Book{Mylonas2007,
  author = {Mylonas, Phivos and Wallace, Manolis and Angelides, Marios C and Hellwagner, Hermann and Agius, Harry},
  publisher = {IEEE},
  title = {Second International Workshop on Semantic Media Adaptation and Personalization (SMAP 2007)},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  month = dec,
  isbn10 = {0769530400},
  isbn13 = {978-0769530406},
  language = {EN},
  pages = {269},
  url = {http://www.smap2007.org/}
}
@Article{Lux2007c,
  author = {Lux, Mathias and Dösinger, Gisela},
  journal = {International Journal of Knowledge and Learning},
  title = {From folksonomies to ontologies: employing wisdom of the crowds to serve learning purposes},
  year = {2007},
  month = oct,
  number = {No. 4/5},
  pages = {515-528},
  volume = {Vol 3},
  abstract = {Is Web 2.0 just hype or just a buzzword, which might disappear in the near future One way to find answers to these questions is to investigate the actual benefit of the Web 2.0 for real use cases. Within this contribution we study a very special aspect of the Web 2.0 the folksonomy and its use within self-directed learning. Guided by conceptual principles of emergent computing we point out methods, which might be able to let semantics emerge from folksonomies and discuss the effect of the results in self-directed learning.},
  address = {NA},
  doi = {10.1504/IJKL.2007.016709},
  language = {EN},
  publisher = {Inderscience Publishers},
  url = {http://www.ingentaconnect.com/content/ind/ijkl/2008/00000003/F0020004/art00009}
}
@InProceedings{Lux2007b,
  author = {Lux, Mathias and Granitzer, Michael and Kern, Roman},
  booktitle = {18th International Workshop on Database and Expert Systems Applications (DEXA 2007)},
  title = {Aspects of Broad Folksonomies},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Tjoa, A-Min and Wagner, R R},
  month = sep,
  pages = {283-287},
  publisher = {IEEE},
  abstract = {Folksonomies, collaboratively created sets of metadata, are becoming more and more important for organising information and knowledge of communites in the Web. While for a single user the difference to keyword assignment is marginal, the power of folksonomies emerges from the collaborative aspects. Folksonomies are already issue of research.Within this publication we analyse underlying statistical properties of broad folksonomies aiming to identify laws and characteristics, which allow inferring properties for folksonomy based retrieval. The actual benefit of folksonomies for retrieval and the derived methods are concluded from experiments with aggregated data from del.icio.us1.},
  doi = {10.1109/DEXA.2007.40},
  isbn10 = {0-7695-2932-1},
  issn = {1529-4188},
  language = {EN},
  talktype = {none}
}
@Article{Lux2007a,
  author = {Lux, Mathias},
  journal = {ÖGAI Journal},
  title = {Web 2.0: Die soziale Komponente im World Wide Web},
  year = {2007},
  issn = {0254-4326},
  month = mar,
  pages = {14-18},
  address = {Wien},
  language = {DE},
  publisher = {Österreichische Gesellschaft für Artificial Intelligence}
}
@InProceedings{Lux2007,
  author = {Lux, Mathias and Dösinger, Gisela and Beham, Günter},
  booktitle = {Datenbanksysteme in Business, Technologie und Web (BTW 2007)},
  title = {Empirical Studies in Multimedia Retrieval Evaluation},
  year = {2007},
  address = {NA},
  editor = {Jarke, Matthias and Seidl, Thomas and Quix, Christoph and Kensche,David and Conrad, Stefan and Rahm, Erhard and Klamma, Ralf and Kosch, Harald and Granitzer, Michael and Apel, Sven and Rosenm, Marko and Saake, Gunter and Spinczyk, Olaf},
  month = mar,
  pages = {199-217},
  publisher = {NA},
  abstract = {The evaluation of retrieval mechanisms for inter-method comparison is necessary in academic as well as in applied research. A major issue in every evaluation is in which way and to what extent the actual perception of the user from the target user group is integrated. Within multimedia retrieval systems the impressions and perceptions of users vary much more than in text retrieval. Empirical studies are a common tool in social science and offer a way to research the correlation between the user perception and the computed similarity between pairs of multimedia documents or a query and the set of results. This approach can be used to complement and extend current evaluation approaches. Within this contribution we summarize general methods from social science and psychology for the interested reader in the area of computer science with some knowledge about statistics. Furthermore we give two examples of undertaken empirical experiments and their outcomes. Within the first one the perception of users is investigated and compared to factors like background and gender, while in the second study metrics are tested upon their ability to reflect the notion of similarity of users. Both experiments aim to give examples and insight on how empirical studies can be used in multimedia research in general and multimedia retrieval evaluation in special.},
  issn = {3-86130-929-7},
  language = {EN},
  talktype = {none},
  url = {http://pdf.aminer.org/000/069/740/empirical_studies_in_multimedia_retrieval_evaluation.pdf}
}
@InProceedings{Lang2007,
  author = {Lang, Margit and Kosch, Harald and Stars, S and Kettner, Cartsten and Lachner, Janine and Oborny, Doris},
  booktitle = {Proceedings of the 8th International Workshop on Image Analysis for Multimedia Interactive Services (WIAMIS 2007)},
  title = {Recognition of Botanical Bloom Characteristics from Visual Features.},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Kompatsiaris, Y and Avrithis, Y},
  month = jun,
  pages = {27-27},
  publisher = {IEEE},
  abstract = {There is a number of image retrieval systems which allow a fast similarity search in large image databases. But to our knowledge there are no image retrieval systems which bring together information extraction from the image as well as object recognition and classification of the object analyzed. This paper introduces techniques to enable the extraction of botanical characteristics from visual features to support semi-automatic plant recognition. The identification of plants requires recognition and determination of plant species specific features such as bloom colour, inflorescences, shape of blooms, number of petals and shape of leaves. Our approach is to improve an existing medicinal plant database, called MedPhyt, by this basic requirement. We demonstrate the first steps towards a semiautomatic system for the identification of a plant species or at least plant families by the combination of both bloom colour and contour information under consideration of a specific content and knowledge domain using the features of MPEG-7.},
  issn = {076952818X},
  language = {EN},
  talktype = {none}
}
@InProceedings{Lachner2007,
  author = {Lachner, Janine and Lorenz, Andreas and Reiterer, Bernhard and Zimmermann, Andreas and Hellwagner, Hermann},
  booktitle = {Second International Workshop on Semantic Media Adaptation and Personalization (SMAP 2007)},
  title = {Challenges toward User-centric Multimedia},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Mylonas, Phivos and Wallace, Manolis and Angelides, Marios C},
  month = sep,
  pages = {159-164},
  publisher = {IEEE},
  abstract = {Currently, much research aims at coping with the shortcomings in multimedia consumption that may exist in a user's current context, e.g., due to the absence of appropriate devices at many locations, a lack of capabilities of mobile devices, restricted access to content, or non-personalized user interfaces. Recently, solutions to specific problems have been emerging, e.g., wireless access to multimedia repositories over standardized interfaces; however, due to usability restrictions the user has to spend much effort to or is even incapable of fulfilling his/her demands. The vision of user-centric multimedia places the user in the center of multimedia services to support his/her multimedia consumption intelligently, dealing with the aforementioned issues while minimizing required work. Essential features of such a vision are comprehensive context awareness, personalized user interfaces, and multimedia content adaptation. These aspects are addressed in this paper as major challenges toward a user-centric multimedia framework.},
  isbn10 = {0769430400},
  isbn13 = {9780769530406},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Challenges toward User-centric Multimedia.pdf},
  talktype = {none},
  url = {http://www.smap2007.org/}
}
@InProceedings{Kropfberger2007,
  author = {Kropfberger, Michael and Tusch, Roland and Jakab, Michael and Köpke, Julius and Ofner, Michael and Hellwagner, Hermann and Böszörmenyi, Laszlo},
  booktitle = {Proceedings of the 3rd International Conference on Web Information Systems and Technologies (WEBIST '07)},
  title = {A Multimedia-Based Guidance System for various Consumer Devices},
  year = {2007},
  address = {Setubal, Portugal},
  editor = {Filipe, Joaquim and Cordeiro, José},
  month = mar,
  pages = {83-90},
  publisher = {INSTICC Press},
  abstract = {This paper introduces aWeb-based guidance system which supports optimized presentations of sights or exhibited objects on different types of available stationary and mobile consumer devices, possibly running different operating systems. This is accomplished by adapting both the objects’ content, as well as their presentation to the current usage context. Content thereby may be encoded in different presentation formats like video, audio, image, and marked-up text. The usage context embraces a set of properties describing the current usage environment of the guide. This includes, for example, the consumer device’s capabilities, its current location, and the user’s preferences. Both, the content adaptation and presentation services are based on standardWeb technologies for increased interoperability. Finally, the guidance system is augmented with a Web-based content management and a statistics module, which enable for remote content administration and usage evaluations, respectively.},
  isbn13 = {978-3-540-68257-8},
  keywords = {Multimedia-based guide for stationary and mobile devices, context-awareness, content adaptation, presentation adaptation, content management.},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/A multimedia-based guidance system for various consumer devices.pdf},
  talktype = {none},
  url = {http://www.webist.org/}
}
@InProceedings{Kofler2007a,
  author = {Kofler, Ingo and Timmerer, Christian and Ahmed, Toufik and Hellwagner, Hermann},
  booktitle = {Proceedings of the Second International Workshop on Semantic Media Adaptation and Personalization (SMAP)},
  title = {Towards MPEG-21-based Cross-layer Multimedia Content Adaptation},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Mylonas, Phivos and Wallace, Manolis and Angelides, Marios C},
  month = dec,
  pages = {3-8},
  publisher = {IEEE},
  series = {SMAP},
  abstract = {The adaptation of multimedia resources is a common method to enable the transport and consumption of audio-visual content in constrained environments. An important aspect in this field is adaptation decision-taking, which aims to find adaptation parameters that maximize the quality for the consumer while considering the constraints of the networks and terminals involved. In this paper we focus on improving the adaptation of audio-visual content by maximizing the perceived quality. This can be realized by using a multimedia quality model and content-related metadata. We present an approach to derive this content-related metadata from subjective tests and use it for adaptation decision-taking within the MPEG-21 multimedia framework.},
  doi = {10.1109/SMAP.2007.34},
  isbn10 = {0769530400},
  isbn13 = {978-0769530406},
  language = {EN},
  location = {London, United Kingdom},
  pdf = {https://www.itec.aau.at/bib/files/MPEG-21XL_SMAP2007.pdf},
  talkdate = {2009.05.29},
  talktype = {registered}
}
@InProceedings{Kofler2007,
  author = {Kofler, Ingo and Timmerer, Christian and Hutter, Andreas and Sanahuja, Francesc},
  booktitle = {Proceedings of {SPIE-IS\&T} Electronic Imaging Multimedia Computing and Networking Conference ({MMCN})},
  title = {Efficient MPEG-21-based Adaptation Decision-Taking for Scalable Multimedia Content},
  year = {2007},
  address = {Bellingham, Washington, USA},
  editor = {Zimmermann, Roger and Griwodz, Carsten},
  month = jan,
  pages = {65040J-1-65040J-8},
  publisher = {SPIE},
  series = {MMCN},
  abstract = {The MPEG-21 standard defines a framework for the interoperable delivery and consumption of multimedia content. Within this framework the adaptation of content plays a vital role in order to support a variety of terminals and to overcome the limitations of the heterogeneous access networks. In most cases the multimedia content can be adapted by applying different adaptation operations that result in certain characteristics of the content. Therefore, an instance within the framework has to decide which adaptation operations have to be performed to achieve a satisfactory result. This process is known as adaptation decision-taking and makes extensive use of metadata describing the possible adaptation operations, the usage environment of the consumer, and constraints concerning the adaptation. Based on this metadata a mathematical optimization problem can be formulated and its solution yields the optimal parameters for the adaptation operations. However, the metadata is represented in XML resulting in a verbose and inefficient encoding. In this paper, an architecture for an Adaptation Decision-Taking Engine (ADTE) is introduced. The ADTE operates both on XML metadata and on metadata encoded with MPEG's Binary Format for Metadata (BiM) enabling an efficient metadata processing by separating the problem extraction from the actual optimization step. Furthermore, several optimization algorithms which are suitable for scalable multimedia formats are reviewed and extended where it was appropriate},
  edition = {Volume 6504},
  isbn13 = {9780819466174},
  keywords = {Adaptation Decision-Taking, MPEG-21, Digital Item Adaptation, Binary Format for Metadata (BiM)},
  language = {EN},
  location = {San Jose, CA, USA},
  pdf = {https://www.itec.aau.at/bib/files/MMCN2007EfficientMPEG21basedAdaptationDecisionTaking.pdf},
  talkdate = {2007.02.01},
  talktype = {registered}
}
@Article{Jannach2007,
  author = {Jannach, Dietmar and Leopold, Klaus},
  journal = {Journal of Network and Computer Applications},
  title = {Knowledge-based Multimedia Adaptation for Ubiquitous Multimedia Consumption},
  year = {2007},
  month = aug,
  number = {Special issue on "Intelligence-based adaptation for ubiquitous multimedia communications"},
  pages = {958-982},
  volume = {Vol. 30 (3)},
  abstract = {Intelligent, server-side adaptation of multimedia resources is becoming increasingly important and challenging for two reasons. First, the market continuously brings up new mobile end-user devices to which the content has to be adapted as these devices support different display formats and operate on various types of networks. On the other hand, with the help of metadata annotations which are now available in the MPEG-7 and MPEG-21 standard, advanced forms of resource adaptations on the content level become possible. As none of the existing multimedia transformation tools and libraries can support all these different forms of basic and advanced adaptation operations, an intelligent multimedia adaptation server has to integrate such external tools and algorithms and perform an adequate sequence of adaptation operations on the original resource before sending it to the client. In this paper we present the results of the ISO/IEC MPEG core experiment on using Semantic Web Services technology as a tool for declaratively describing the semantics of adaptation services and constructing multi-step adaptation sequences in an open and extensible multimedia adaptation framework. We show how the semantics of adaptation operations can be captured in the form of input, output, precondition, and effects, how the problem of finding adequate adaptation sequences can be viewed as an Artificial Intelligence planning problem, and finally, how the existing MPEG standards are technically integrated into the service descriptions and how they serve as the shared ontology of the domain. Our approach both introduces declarative, knowledge-based technology into the involved multimedia communities and on the other hand broadens the application scope of Semantic Web Service technology in the area of general semantic service descriptions and automated program construction.},
  address = {NA},
  language = {EN},
  publisher = {NA},
  url = {http://www.elsevier.com/wps/find/journaldescription.cws_home/622893/description#description}
}
@InProceedings{Jakab2007,
  author = {Jakab, Michael and Kropfberger, Michael and Ofner, Michael and Tusch, Roland and Hellwagner, Hermann and Böszörmenyi, Laszlo},
  booktitle = {Proceedings of the 15th Euromicro Conference on Parallel, Distributed and Network-based Processing},
  title = {Metadata Integration and Media Transcoding in Universal-Plug-and-Play (UPnP) Enabled Networks},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {D'Ambra, Pasqua and Guarracino, Mario R},
  month = jan,
  pages = {363 - 369},
  publisher = {IEEE},
  abstract = {Universal Plug and Play (UPnP) is a widely accepted standard for automatically detecting devices and services in a local area network as well as for describing and controlling them. In order to deal with multimedia devices and especially content, in 2002 the UPnP-AV standard definition was released. It defines device and service descriptions for Media Servers and Renderers. Thereby, the Media Server’s Content Directory Service allows an easy management and the exchange of metadata about the provided media data. Media content became browsable by semantic meta information about it. There are still two major drawbacks of UPnP-AV, which make its usage in real world multimedia communication scenarios very difficult. First, searching for similar content on distributed Media Servers with a huge number of media files is not economically possible. Second, the media content must be consumed by Renderers as provided by the Servers, independently of their terminal capabilities and network connections. In order to deal with these two drawbacks, this work proposes a novel approach of metadata integration and media transcoding in UPnP networks. First, the Media Server is extended by a Control Point which offers discovery of other Media Servers and fetches metadata from their Content Directories. Furthermore, it integrates the gathered information in its own Content Directory. Control Points are then able to query this Integrating Media Server for a desired content, and get a network-complete search result. Second, terminal and network capabilities of the Render-ers are taken into account in order to transcode and transmit the content in a suitable way for the consuming device. These two approaches of metadata integration and media data adaptation enable searchable logical views on tailored multimedia content in UPnP-AV networks.},
  issn = {1066-6192},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Universal-Plug-and-Play.pdf},
  talktype = {none}
}
@InProceedings{Cobarzan2007,
  author = {Cobarzan, Claudiu and Böszörmenyi, Laszlo},
  booktitle = {Proceedings of the 15th Euromicro Conference on Parallel, Distributed and Network-based Processing},
  title = {Further Developments of a Dynamic Distributed Video Proxy-Cache System},
  year = {2007},
  address = {Los Alamitos, CA, USA},
  editor = {Ambra, P D and Guarracino, M R},
  month = jan,
  pages = {349-357},
  publisher = {IEEE},
  issn = {1066-6192},
  language = {EN},
  talktype = {none}
}
@InProceedings{Boeszoermenyi2007b,
  author = {Böszörmenyi, Laszlo},
  booktitle = {Information und Gesellschaft - Technologien einer sozialen Beziehung},
  title = {Die Henne, modernes Bewusstsein, das Ei moderne Technik?},
  year = {2007},
  address = {Wiesbaden, Germany},
  editor = {Greif, Hajo and Mitrea, Oana and Werner, Matthias},
  month = sep,
  pages = {41-46},
  publisher = {Deutscher Universitäts-Verlag und der VS Verlag für Sozialwissenchaften},
  issn = {9783835070073},
  language = {DE},
  talktype = {none},
  url = {https://www.itec.aau.at/~laszlo/publications/Proceedings/LB_2008_Beitrag_Information_und_Gesellschaft_Kurzfassung.pdf}
}
@Article{Boeszoermenyi2007a,
  author = {Böszörmenyi, Laszlo and Hellwagner, Hermann and Schojer, Peter},
  journal = {Multimedia Systems},
  title = {Metadata-driven optimal transcoding in a multimedia proxy},
  year = {2007},
  month = jul,
  number = {Issue 1},
  pages = {51-68},
  volume = {Vol. 13},
  abstract = {An adaptive multimedia proxy is presented which provides (1) caching, (2) filtering, and (3) media gateway functionalities. The proxy can perform media adaptation on its own, either relying on layered coding or using transcoding mainly in the decompressed domain. A cost model is presented which incorporates user requirements, terminal capabilities, and video variations in one formula. Based on this model, the proxy acts as a general broker of different user requirements and of different video variations. This is a first step towards What You Need is What YouGet (WYNIWYG) video services, which deliver videos to users in exactly the quality they need and are willing to pay for. The MPEG-7 and MPEG-21 standards enable this in an interoperable way. A detailed evaluation based on a series of simulation runs is provided.},
  address = {Berlin, Heidelberg, New York},
  doi = {9780769530406},
  keywords = {Video proxy · Video caching · Media gateway · Media adaptation · Metadata · MPEG-7 · MPEG-21 · Cache replacement},
  language = {EN},
  pdf = {https://www.itec.aau.at/bib/files/Metadata-driven optimal transcoding in a multimedia proxy.pdf},
  publisher = {Springer}
}
@Book{Boeszoermenyi2007,
  author = {Böszörmenyi, Laszlo},
  publisher = {OCG},
  title = {MEDICHI 2007 - Methodic and Didactic Challenges of the History of Informatics},
  year = {2007},
  address = {Wien},
  month = {jan},
  series = {OCG Schriftenreihe},
  abstract = {The focus of the workshop has been laid on the issues of the methodology and didactics of the history of informatics. A special interest has been devoted to contributions which document some aspect of Austria’s role in the field of informatics, or provide insight into the impact of informatics on the Austrian society. Informatics (computer science) is a thriving science yet its brief history is barely credited as an academic discipline. The existing body of historical literature, while small, includes some brilliant contributions, especially biographical and technological chronicles, as well as some excellent anecdotal treatments. Nevertheless, the methods and didactical approaches for examining the history of informatics are poorly developed; the number of conferences and journals dealing with these issues is few, as is the number of young scientists doing scientific research on the history of informatics. This is not because these topics are uninteresting or irrelevant; rather, the conditions for methodically well-founded research are lacking. The motivation of MEDICHI 2007 has been to contribute towards making the ‘history of informatics’ an accepted science and a valued component of Informatics education and research. Each submitted paper has been reviewed by 3 members of the program committee. From 12 submitted papers, 8 have been accepted as a full and 2 as a short paper to be presented. Additionally, 5 invited position papers, written by members of the program committee and 4 invited keynote talks have been presented in altogether 8 sessions. Each presentation is published in the proceedings at hand. The MEDIHCI 2007 workshop was also the venue for awarding the prizes of the 2007 Wolfgang von Kempelen Prize for Computing Science History. The organizers thank to all participants for their contributions and wish the reader an exiting tour through the proceedings},
  issn = {9783854032205},
  language = {EN},
  pages = {178},
  url = {https://www.itec.aau.at/medichi2007}
}