@inproceedings {INPROC-2006-13,
author = {Tobias Drosdol and Dominique Dudkowski and Christian Becker and Kurt Rothermel},
title = {{Efficient Indexing of Symbolic Location Information}},
booktitle = {Proceedings of the Second Workshop on Context Awareness for Proactive Systems (CAPS 2006)},
address = {Kassel, Germany},
publisher = {---},
institution = {Universit{\"a}t Stuttgart : Sonderforschungsbereich SFB 627 (Nexus: Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme), Germany},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2006},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
E.2 Data Storage Representations,
H.3 Information Storage and Retrieval},
contact = {Tobias.Drosdol@ipvs.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Verteilte Systeme},
abstract = {Providing context-awareness in future applications demands for accurate
information about the positions of a potentially large number of mobile
objects. This requires location management systems that are capable of coping
with a huge amount of such highly dynamic data. To efficiently retrieve
relevant information, e.g., all objects located inside a given area, these
systems must utilize adequate index structures. In the past, suitable indexes
have been explored for geometric representations of location information only.
The contribution of this paper is a generic index structure for the efficient
management of symbolic location information. Based on different index variants
an adaptive approach is derived that can be adjusted to accommodate different
ratios of update and retrieval load. Our experimental results show how this can
significantly increase the overall performance of a location management system.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2006-13&engl=0}
}
@inproceedings {INPROC-2005-58,
author = {Daniela Nicklas and Susanne B{\"u}rklen and Tobias Drosdol and Nicola H{\"o}nle},
title = {{Benefits of Context Models in Smart Environments}},
booktitle = {2. GI/ITG KuVS Fachgespr{\"a}ch Ortsbezogene Anwendungen und Dienste},
editor = {J{\"o}rg Roth},
address = {Hagen},
publisher = {Fernuniversit{\"a}t Hagen},
institution = {Universit{\"a}t Stuttgart : Sonderforschungsbereich SFB 627 (Nexus: Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme), Germany},
series = {Informatik Bericht},
volume = {324},
pages = {12--15},
type = {Konferenz-Beitrag},
month = {Juni},
year = {2005},
keywords = {context models; smart environment; smart room; Nexus},
language = {Englisch},
cr-category = {H.4 Information Systems Applications},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2005-58/INPROC-2005-58.pdf,
http://dreamteam.fernuni-hagen.de/fg_lbs/meeting_2/meeting_2.html,
http://www.nexus.uni-stuttgart.de},
contact = {daniela.nicklas@informatik.uni-stuttgart.de susanne.buerklen@informatik.uni-stuttgart.de tobias.drosdol@informatik.uni-stuttgart.de nicola.hoenle@informatik.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware;
Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Verteilte Systeme},
abstract = {Ongoing technologic advances drive the emergence of smart items, everyday
objects with embedded microcomputers and communication capabilities. In a smart
envi-ronment a multitude of such smart items exist to assist its users. In this
paper, we will show how smart environments can benefit from the concepts of the
Nexus platform, an open pervasive computing system that supports various kinds
of context-aware applica-tions by providing a federated, potentially global
context model.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-58&engl=0}
}
@inproceedings {INPROC-2005-14,
author = {Dominique Dudkowski and Tobias Drosdol and Pedro Jos{\'e} Marr{\'o}n},
title = {{Towards Scalable and Efficient Processing of Probabilistic Spatial Queries in Mobile Ad Hoc and Sensor Networks}},
booktitle = {Mobile Datenbanken: heute, morgen und in 20 Jahren. 8. Workshop des GI-Arbeitskreises ``Mobile Datenbanken und Informationssysteme''},
editor = {Birgitta K{\"o}nig-Ries and Michael Klein},
address = {Karlsruhe},
publisher = {-},
institution = {Universit{\"a}t Stuttgart : Sonderforschungsbereich SFB 627 (Nexus: Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme), Germany},
pages = {75--84},
type = {Konferenz-Beitrag},
month = {Februar},
year = {2005},
keywords = {Mobile Ad Hoc Networks; MANETs; MANET; Sensor Networks; WSNs; WSN; Wireless Sensor Networks; Mobile Networks; Queries; Probabilistic Queries; Spatial Queries},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems},
ee = {ftp://ftp.informatik.uni-stuttgart.de/pub/library/ncstrl.ustuttgart_fi/INPROC-2005-14/INPROC-2005-14.pdf},
contact = {Senden Sie eine E-Mail an dudkowski@informatik.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Verteilte Systeme},
abstract = {With the proliferation of sensor technology and advances in wireless
communication, gathering, processing, and querying context information in
mobile ad hoc and sensor networks becomes attractive and feasible. To support
context-aware applications in such networks, efficient processing techniques
for frequently used functionality, such as query and event management, are
highly beneficial. In this paper, we discuss the challenges in efficient
processing of spatial queries in mobile ad hoc and sensor networks. These
comprise advanced query semantics based on inaccurate position information,
efficient protocols and algorithms for data storage and query resolution,
scalability with respect to network size, and support for mobile network nodes.
We outline our concepts for solving these issues and show how they can be
implemented in a suitable software architecture. Using current evaluation
results, we show that our prototype implementation fulfills the stated
challenges.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2005-14&engl=0}
}
@inproceedings {INPROC-2004-24,
author = {Tobias Drosdol and Thomas Schwarz and Martin Bauer and Matthias Gro{\ss}mann and Nicola H{\"o}nle and Daniela Nicklas},
title = {{Keeping Track of ``Flying Elephants'': Challenges in Large-Scale Management of Complex Mobile Objects}},
booktitle = {Proceedings of INFORMATIK 2004 - the Thirty-Fourth Annual Conference of the Gesellschaft f{\"u}r Informatik e.V.(GI); Ulm, Germany, September 20-24, 2004. Vol. 1},
editor = {Peter Dadam and Manfred Reichert},
address = {Bonn},
publisher = {K{\"o}llen Druck+Verlag GmbH},
institution = {Universit{\"a}t Stuttgart : Sonderforschungsbereich SFB 627 (Nexus: Umgebungsmodelle f{\"u}r mobile kontextbezogene Systeme), Germany},
series = {Lecture Notes in Informatics},
volume = {P-50},
pages = {288--292},
type = {Konferenz-Beitrag},
month = {September},
year = {2004},
isbn = {3-88579-379-2},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
H.2.4 Database Management Systems,
H.2.8 Database Applications,
H.3.4 Information Storage and Retrieval Systems and Software},
contact = {Tobias Drosdol Tobias.Drosdol@informatik.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Anwendersoftware;
Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Verteilte Systeme},
abstract = {The management of mobile objects like cars, persons, or workpieces in a factory
is an important task in many context-aware environments. So far, most solutions
can either cope with many small objects (few properties) or with a limited
number of complex objects in a centralized way. In this paper, we face the
challenge of managing a large number of bulky mobile objects (flying
elephants). We state requirements, propose basic components, and discuss
alternative architectures based on the main influencing factors like mobility
and update rate.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=INPROC-2004-24&engl=0}
}
@article {ART-2001-14,
author = {Tobias Drosdol and Christoph Ruffner},
title = {{Infobox: Virtual Information Towers}},
journal = {GIS Geo-Informations-Systeme},
address = {Heidelberg},
publisher = {Herbert Wichmann Verlag},
volume = {6},
pages = {18--19},
type = {Artikel in Zeitschrift},
month = {September},
year = {2001},
keywords = {Nexus, VIT, ViLiS},
language = {Englisch},
cr-category = {C.2.4 Distributed Systems,
H.3.3 Information Search and Retrieval},
contact = {Tobias Drosdol Tobias.Drosdol@informatik.uni-stuttgart.de},
department = {Universit{\"a}t Stuttgart, Institut f{\"u}r Parallele und Verteilte Systeme, Verteilte Systeme},
abstract = {The VIT System is an early prototype developed within the context of the NEXUS
project for demonstrating location-based information access. One important
issue when designing an application is to find a suitable concept for user
interaction. Information has to be shown in an intuitive way so that everyone
can handle the system and understands what is going on. Therefore an easily
understandable metaphor for visualizing the information is needed.},
url = {http://www2.informatik.uni-stuttgart.de/cgi-bin/NCSTRL/NCSTRL_view.pl?id=ART-2001-14&engl=0}
}