Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein:
PD Dr. Douglas William Cunningham, Brandendurgische Tehnische Universität
Cottbus:
Perceptual Research Methodology and its relevance for Computer Graphics
Beginn: 24.06.2010, 14:00 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
Galeriegeschoss, Raum G30
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2010-06-24-cunningham.html
Kontakt: Prof. Dr.-Ing. Marcus A. Magnor
Perceptual psychology and computer graphics ask many questions that are
formally similar. These questions relate to how one can -- with rather
limited resources -- extract, represent, and manipulate targeted portions
of the vast amount of information present in the physical world. Over
the last 150 years, perceptual psychologists have developed and refined
a wide variety of experimental methods, and have gathered a wealth of
detailed information about the algorithms that underlie human perceptual
processes. Since many of the tasks and challenges explored in computer
graphics are similar to those faced in human perception, and since
humans are often the end-user of computer generated imagery, computer
scientists are increasingly adapting knowledge about human perception
to develop perceptually-inspired computer graphics algorithms. Moreover,
computer graphics researchers are increasingly being asked to prove that
newly developed techniques meet specific claims, such as "Are the images
generated by the new method really indistinguishable from a photograph?";
"If not, why not?"; "Do the new visualizations really improve the
performance of experts on specific tasks?" A firm understanding of
perceptual research methodology will now only make it easier to comprehend
and utilize existing knowledge about human perceptual capabilities,
but will also enable you to ask and answer similar questions for your
algorithms. In this talk, I will provide a brief overview of perceptual
methodology and some of the fundamental assumptions that lie behind it.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein:
Goetz Graefe:
Adaptive Indexing
Beginn: 17.06.2010, 17:30 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
1. OG, Hörsaal M 160
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2010-06-17-graefe.html
Kontakt: Prof. Dr. Wolf-Tilo Balke
In a relational data warehouse with many tables, the number of possible
and promising indexes exceeds human comprehension and requires automatic
index tuning. While monitoring and reactive index tuning have been
proposed, adaptive indexing focuses on adapting the physical data-base
layout for and by actual queries.
"Database cracking" is one such technique. Only if and when a column
is used in query predicates, an index for the column is created;
and only if and when a key range is queried, the index is optimized
for this key range. The effect is akin to a sort that is adaptive and
incremental. This sort is, however, very inefficient, particularly when
applied on block-access devices. In contrast, traditional index creation
sorts data with an efficient merge sort optimized for block-access
devices, but it is neither adaptive nor incremental.
We propose adaptive merging, an adaptive, incremental, and efficient
technique for index creation. Index optimization focuses on key ranges
used in actual queries. The resulting index adapts more quickly to new
data and to new query patterns than database cracking. Sort efficiency
is comparable to that of traditional B-tree creation. Nonetheless, the
new technique promises better query performance than database cracking,
both in memory and on block-access storage.
Bio
Goetz Graefe is a member of the Intelligent Information Management Lab
within Hewlett-Packard Laboratories. His experience and expertise are
focused on relational database management systems, gained in academic
research, industrial consulting, and industrial product development.
His current research efforts focus on new hardware technologies
in database management as well as robustness in database request
processing in order to reduce total cost of ownership. Prior to joining
Hewlett-Packard Laboratories in 2006, Goetz spent 12 years as software
architect in product development at Microsoft, mostly in database
management. Both query optimization and query execution of Microsoft's
re-implementation of SQL Server are based on his designs.
Goetz's areas of expertise within database management systems include
compile-time query optimization including extensible query optimization,
run-time query execution including parallel query execution, indexing,
and transactions. He has also worked on transactional memory, specifically
techniques for software implementations of transactional memory.
Goetz studied Computer Science at TU Braunschweig from 1980 to 1983.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein:
Prof. Jan F. Broenink, University of Twente:
A model-driven approach to robot-software design
Beginn: 12.07.2010, 17:00 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
Galeriegeschoss, Raum G04
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2010-07-12-broenink.html
Kontakt: Prof. Dr.-Ing. F. M. Wahl
The work presented here is on a methodology for design of hard real-time
embedded control software for mechatronic products. The behavior of
the total mechatronic system (machine, control, software and I/O) is
relevant, because the dynamics of the machine influences the robot
software. Therefore, we use appropriate Models of Computation and
tools. The design work can be done as a stepwise refinement process,
yielding shorter design time, and a better quality product. The tools
use templates and pass model-specific information between each other via
parameterized tokens in the generated, high-level code, to get a better
separation of design steps. This allows for better quality of the models
and more reuse, thus enhancing the efficiency of model-driven design
for the (industrial) end user. This is illustrated by the realization
of the embedded software of a real system. The method is illustrated
with a case using the tools being prototyped.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein:
Prof. Dr. Andreas Schwill, Didaktik der Informatik, Universität Potsdam:
Hochleister bei der Lösung informatischer Probleme - Was können
Niedrigleister lernen?
Beginn: 07.07.2010, 17:00 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
1. OG, Hörsaal M 161
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2010-07-07-schwill.html
Kontakt: Dr. Werner Struckmann
In den vergangenen Jahren haben wir jugendliche Hoch- und Niedrigleister
in Informatik mithilfe der Methode des Lauten Denkens bei der Lösung von
informatischen Problemen beobachtet, um etwas über die Vorgehensweisen,
Problemlösestrategien, Denkprozesse und Verwendung von fundamentalen
Ideen der Informatik zu erfahren.
Sofern die Untersuchungen ergeben, daß Hochleister mit größerem
Erfolg charakteristische Problemlösestrategien und Informatikmethoden
verwenden, so kann in einem weiteren Schritt geprüft werden,
inwieweit diese Strategien und Methoden an Niedrigleister vermittelt
werden können. Prototypisch entwickeln wir dazu ein Lehrvideo, das als
kommentierter Zusammenschnitt nachempfundener typischer Vorgehensweisen
von Hochleistern beim Lösen einer Testaufgabe dazu beitragen soll,
Denkprozesse zu veranschaulichen und Problemlösekompetenz zu erwerben.
Im Vortrag berichten wir über Hintergründe, Methoden und Ergebnisse
dieser Studie und stellen nach Möglichkeit eine erste Fassung des
Lehrvideos vor.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein:
PD Dr. Douglas William Cunningham, Brandendurgische Tehnische Universität
Cottbus:
Perceptual Research Methodology and its relevance for Computer Graphics
Beginn: 24.06.2010, 14:00 Uhr
Ort: TU Braunschweig, Informatikzentrum, Mühlenpfordtstraße 23,
Galeriegeschoss, Raum G30
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2010-06-24-cunningham.html
Kontakt: Prof. Dr.-Ing. Marcus A. Magnor
Perceptual psychology and computer graphics ask many questions that are
formally similar. These questions relate to how one can -- with rather
limited resources -- extract, represent, and manipulate targeted portions
of the vast amount of information present in the physical world. Over
the last 150 years, perceptual psychologists have developed and refined
a wide variety of experimental methods, and have gathered a wealth of
detailed information about the algorithms that underlie human perceptual
processes. Since many of the tasks and challenges explored in computer
graphics are similar to those faced in human perception, and since
humans are often the end-user of computer generated imagery, computer
scientists are increasingly adapting knowledge about human perception
to develop perceptually-inspired computer graphics algorithms. Moreover,
computer graphics researchers are increasingly being asked to prove that
newly developed techniques meet specific claims, such as "Are the images
generated by the new method really indistinguishable from a photograph?";
"If not, why not?"; "Do the new visualizations really improve the
performance of experts on specific tasks?" A firm understanding of
perceptual research methodology will now only make it easier to comprehend
and utilize existing knowledge about human perceptual capabilities,
but will also enable you to ask and answer similar questions for your
algorithms. In this talk, I will provide a brief overview of perceptual
methodology and some of the fundamental assumptions that lie behind it.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig laden im Rahmen des Informatik-Kolloquiums zu folgendem
Vortrag ein:
Anna Kučerová, Czech Technical University in Prague:
Uncertainty Updating in the Description of Nonlinear Heat Transfer
Beginn: 03.06.2010, 10:30 Uhr
Ort: TU Braunschweig, Gauß-IT-Zentrum, Hans-Sommer-Str. 65,
Seminarraum 012
Webseite: http://www.ibr.cs.tu-bs.de/cal/kolloq/2010-06-03-kucerova.html
Kontakt: Prof. Hermann G. Matthies, PhD
There are many important factors limiting the service life of
buildings. An appropriate reliability analysis needs to take into account
uncertainties in the environmental conditions as well as in structural
properties. Thanks to the growth of powerful computing resources and
technology, recently developed procedures in the field of stochastic
mechanics have become applicable to realistic engineering systems. The
presented contribution is focused on the mod- elling of uncertainties in
material properties and investigates the influence of such uncertainties
on structural response. Particularly, the material property is described
by random field which enables description of material heterogeneity. The
uncertainty in material is then propagated through the numerical model
within the framework of spectral stochastic finite element method and
as a result we obtain the probabilistic description of the structural
response. Moreover, once the structure is built new experiments should
be performed to update the knowledge about the actual state of the
structure. These experiments are often expensive, but the obtained data
can be used to decide about an appropriate reconstruction which can
significantly extend the lifetime of building and consequently save
money. Therefore, we apply Bayesian inference to update our knowledge
about the material property of interest. In this contribution, we examine
the application of the described methodology to the case of non-linear
heat transfer.
Die Dozenten der Informatik-Institute der Technischen Universität
Braunschweig machen auf folgenden Vortrag der GI Regionalgruppe
Braunschweig aufmerksam:
GI-Vortrag: Martin Neitzel, Gärtner Datensysteme GmbH & Co. KG, ISP:
Internet-Trends – ein Rückblick
Beginn: 02.06.2010, 18:30 Uhr
Ort: Haus der Wissenschaft, Raum Veolia, Pockelsstrasse 11
Webseite: http://www.lineas.de/gi-bs/
Kontakt: Anja Schaar-Goldapp, Sprecherin der GI Regionalgruppe BS
Seit mittlerweile gut 15 Jahren gibt es das “Internet für Jedermann”
in Deutschland. Da lohnt es sich, den aktuellen Hype des Tages einmal
zu ignorieren und stattdessen einen längeren Blick zurück in die
Vergangenheit zu werfen. Präsentiert werden verschiedene Trends, die
über diese Spanne hinweg bislang durchlaufen wurden oder auch nur im
Sande verlaufen sind. Die Themen-Auswahl ist dabei rein subjektiv aus
der Perspektive eines Internet-Service-Providers und tendenziell eher
unterhaltsam als technisch. Auch der “normale Internet-Benutzer”
wird folgen können, wenn ein Blick hinter die Kulissen des Internets
geworfen wird.
