Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein.
Prof. Dr. Joachim M. Buhmann, ETH Zürich, Lehrstuhl für Information
Science & Engineering:
Big Data: where is the information
Beginn: 13.08.2013, 10:00 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
Galeriegeschoss, Raum G04
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-08-13-buhmann.html
Kontakt: Prof. Dr.-Ing. F. M. Wahl
The digital revolution has created unprecedented opportunities in
computing and communication but it also has generated the data deluge with
an urgent demand for new pattern recognition technology. Learning patterns
in data requires to extract interesting, statistically significant
regularities in (large) data sets, e.g. the identification of connection
patterns in the brain (connectomics) or the detection of cancer cells
in tissue microarrays and estimating their staining as a cancer severity
score. Admissible solutions or hypotheses specify the context of pattern
analysis problems which have to cope with model mismatch and noise in
data. An information theoretic approach is developed which estimates
the precision of inferred solution sets and regularizes solutions
in a noise adapted way. The tradeoff between "informativeness" and
"robustness" is mirrored by the balance between high information content
and identifiability of solution sets, thereby giving rise to a new notion
of context sensitive information. Cost function to rank solutions and,
more abstractly, algorithms are considered as noisy channels with an
approximation capacity. The effectiveness of this concept is demonstrated
by model validation for spectral clustering based on different variants
of graph cuts. The concept also enables us to measure how many bit are
extracted by sorting algorithms when the input and thereby the pairwise
comparisons are subject to fluctuations.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein.
Prof. Dr. Klara Nahrstedt, University of Illinois at Urbana-Champaign,
Department of Computer Science:
Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth
Sensing
Beginn: 15.07.2013, 13:30 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
1. OG, Hörsaal M 161
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html
Kontakt: Prof. Dr. Wolf-Tilo Balke
Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag
zu gemeinsamem Kaffee und Kuchen einzufinden.
Collecting real human movements has drawn significant attention from
research community. The reasons are multiple, including new insights in
network protocol design, network management within urban planning, and
environmental impact. However, obtaining comprehensive trace of people
movement with integrated context information about location, contacts
and stay duration has been missing and it proves to be a hard task.
In this talk we present a novel framework, which includes two major
components: the UIM (University of Illinois Movement) sensing component
and the Joytish context-analysis component. This framework includes (a)
scanning process of joint location information (via WiFi scanner) and ad
hoc contacts (via Bluetooth scanner) of human movement at the University
of Illinois campus using Google Android phones, and (b) trace analysis
algorithm of joint Bluetooth/WiFi information with its context inference
towards characterization of people mobility patterns. This framework
then enables us to deploy an efficient data dissemination protocol which
uses both WiFi access point and ad hoc Bluetooth contact information to
expedite the data forwarding. Our results show that we can characterize
the detailed regularity of people movement, the visit duration of people
at certain locations, and the popularity of locations. The evaluation of
our dissemination protocol shows strong improvement of data forwarding
delays when compared with other state-of-the-art protocols.
We will conclude the talk with a short discussion of challenges when
it comes to mobility patterns of different user groups and of needs for
characterizing and understanding people movement patterns in different
scenarios if we aim to deploy effective protocols and services on future
mobile hand-held devices.
Klara Nahrstedt is a full professor at the University of Illinois at
Urbana-Champaign, Computer Science Department. Her research interests
are directed toward multimedia mobile systems, quality of service
(QoS) management in mobile networks, QoS-aware resource management,
3D tele-immersive systems and networks, and real-time security in
mission-critical systems. She is the co-author of widely used multimedia
books `Multimedia: Computing, Communications and Applications' published
by Prentice Hall, and Multimedia Systems published by Springer Verlag. She
is the recipient of the IEEE Communication Society Leonard Abraham Award
for Research Achievements, Ralph and Catherine Fisher Professor chair,
University Scholar, Humboldt Award, and the former chair of ACM SIG
Multimedia. She was the general chair of ACM Multimedia 2006, general
chair of ACM NOSSDAV 2007 and the general chair of IEEE Percom 2009.
Klara Nahrstedt received her Diploma in Mathematics from Humboldt
University, Berlin, Germany in numerical analysis in 1985. In 1995 she
received her PhD from the University of Pennsylvania in the Department of
Computer and Information Science. She is the ACM Fellow and IEEE Fellow.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein.
Prof. Dr. Klara Nahrstedt, University of Illinois at Urbana-Champaign,
Department of Computer Science:
Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth
Sensing
Beginn: 15.07.2013, 13:30 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
1. OG, Hörsaal M 161
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html
Kontakt: Prof. Dr. Wolf-Tilo Balke
Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag
zu gemeinsamem Kaffee und Kuchen einzufinden.
Collecting real human movements has drawn significant attention from
research community. The reasons are multiple, including new insights in
network protocol design, network management within urban planning, and
environmental impact. However, obtaining comprehensive trace of people
movement with integrated context information about location, contacts
and stay duration has been missing and it proves to be a hard task.
In this talk we present a novel framework, which includes two major
components: the UIM (University of Illinois Movement) sensing component
and the Joytish context-analysis component. This framework includes (a)
scanning process of joint location information (via WiFi scanner) and ad
hoc contacts (via Bluetooth scanner) of human movement at the University
of Illinois campus using Google Android phones, and (b) trace analysis
algorithm of joint Bluetooth/WiFi information with its context inference
towards characterization of people mobility patterns. This framework
then enables us to deploy an efficient data dissemination protocol which
uses both WiFi access point and ad hoc Bluetooth contact information to
expedite the data forwarding. Our results show that we can characterize
the detailed regularity of people movement, the visit duration of people
at certain locations, and the popularity of locations. The evaluation of
our dissemination protocol shows strong improvement of data forwarding
delays when compared with other state-of-the-art protocols.
We will conclude the talk with a short discussion of challenges when
it comes to mobility patterns of different user groups and of needs for
characterizing and understanding people movement patterns in different
scenarios if we aim to deploy effective protocols and services on future
mobile hand-held devices.
Klara Nahrstedt is a full professor at the University of Illinois at
Urbana-Champaign, Computer Science Department. Her research interests
are directed toward multimedia mobile systems, quality of service
(QoS) management in mobile networks, QoS-aware resource management,
3D tele-immersive systems and networks, and real-time security in
mission-critical systems. She is the co-author of widely used multimedia
books `Multimedia: Computing, Communications and Applications' published
by Prentice Hall, and Multimedia Systems published by Springer Verlag. She
is the recipient of the IEEE Communication Society Leonard Abraham Award
for Research Achievements, Ralph and Catherine Fisher Professor chair,
University Scholar, Humboldt Award, and the former chair of ACM SIG
Multimedia. She was the general chair of ACM Multimedia 2006, general
chair of ACM NOSSDAV 2007 and the general chair of IEEE Percom 2009.
Klara Nahrstedt received her Diploma in Mathematics from Humboldt
University, Berlin, Germany in numerical analysis in 1985. In 1995 she
received her PhD from the University of Pennsylvania in the Department of
Computer and Information Science. She is the ACM Fellow and IEEE Fellow.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein.
Klara Nahrstedt, University of Illinois at Urbana-Champaign, Department
of Computer Science:
Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth
Sensing
Beginn: 15.07.2013, 15:00 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
Raum 161
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html
Kontakt: Prof. Dr. Wolf-Tilo Balke
Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag
zu gemeinsamem Kaffee und Kuchen einzufinden.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein.
Klara Nahrstedt, University of Illinois at Urbana-Champaign, Department
of Computer Science:
Characterizing and Leveraging People Movement via Joint WiFi/Bluetooth
Sensing
Beginn: 15.07.2013, 15:00 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
Raum 161
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2013-07-15-nahrstedt.html
Kontakt: Prof. Dr. Wolf-Tilo Balke
Alle Zuhörer sind eingeladen, sich bereits 20 Minuten vor dem Vortrag
zu gemeinsamem Kaffee und Kuchen einzufinden.
