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University
              of Helsinki

HIIT

Niels Brock Logo

DTUlogo

WITMSE 2011

The Eighth Workshop on
Information Theoretic Methods
in Science and Engineering

24-26 June 2015, Copenhagen, Denmark
www.helsinki.fi/witmse2015Trekroner Fort

Program


All events will take place in Room t-014, unless otherwise stated. 

Wednesday, June 24
  • 13.30-14.00: Registration and opening of the workshop
  • 14.00-15.00: Teemu Roos: A tutorial type introduction to MDL
  • 15.00: Coffee break
  • 15:30-16.00: Flemming Topsøe: Generalization of proper scoring rules
  • 16.00-16.30: Łukasz Dębowski: Hilberg Processes and Nonexistence of Universal Redundancy Ratios
  • 17.30-19.00: Welcoming reception
    Location: Rundetårn
Thursday, June 25
  • 8.30-9.30am: Plenary talk: Steffen Lauritzen: Proper local scoring rules
  • 9.30: Coffee break
  • 10.00-10.30: Joseph O'Sullivan: Fundamental Information Geometry Problems. Theory and Applications.
    10.30-11.00: Peter Harremoës:  Applications of proper score and sufficiency
  • 11.00-11.30: Mikhail Malyutov, P. Grosu and T. Zhang: SCOT modeling, training and Homogeneity testing
  • 11.30-12.00: Boris Ryabko and Nadezhda Savina: The one-time pad is robust to small deviations from randomness.
  • 12:00: Lunch in the main building
  • 13.30-14.00:  Peter Beelen: Fast decoding of algebraic codes
  • 14.00-14.30:  Søren Forchhammer and Huynh van Luong: Distributed source coding of video
  • 14.30-15.00: Ioan Tabus: Context coding of 3D images
  • 15.00: Coffee break
  • 15.00-16.30: Recent results: We divide in a communication group and a statistics group and make short blackboard presentations of exciting new results.
  • 17.20-22.00: Banquet dinner
    Location: Trekroner
Friday, June 26
  • 8.30-9.30: Plenary talk: Gerhard Kramer: Upper Bounds on the Capacity of Fiber Channels
  • 9.30: Coffee break
  • 10.00-10.30: Darko Zibar: Opportunities for machine learning techniques in photonics communication
  • 10.30-11.00: Erik Agrell and Magnus Karlsson: Single-user capacity of optical multiuser channels
  • 11.00-11.30: Metodi Yankov og Søren Forchhammer: Achievable information rates on linear interference channels with discrete input
  • 11.30-12.00: Jørn Justesen: Decoding of product codes
  • 12.00: Lunch in the main building
  • 13:00-13.30: Mokshay Madiman: and Ioannis Kontoyiannis: The Ruzsa divergence on Groups
  • 13.30-14.00: Ioannis Kontoyiannis and Maria Skoularidou: Causality and Directed Information Estimation as a Hypothesis test
  • 14.00-14.30:  Bo Markussen: Relevance sampling
  • 14.30: Coffee break
  • 14.30-15.00: Kazuho Watanabe: Rate-distortion analysis for kernel-based distortion measures
  • 15:00-15.30: Closing of the workshop
  • 15:30-17:30: Optional excursion to the optical communication lab at DTU organized by Søren Forchhammer and Michael Galili.
Saturday, June 27
There will be an optional excursion organized by Peter Harremoës. This excursion is not included in the registration fee. We will go to Roskilde where we will first visit the Viking Ship Museum. After that we will visit Roskilde Domkirke that has the burial site for Danish kings and queens since Harald Bluetooth (died around 987 AD, the bluetooth protocol is named after him).

Plenary speakers

Steffen Lauritzen (Univ. Copenhagen): Proper local scoring rules
  • Abstract: A scoring rule is a loss function measuring the quality of a quoted probability distribution Q for a random variable X, in the light of the realized outcome x of X; it is proper if the expected score, under any distribution P for X, is minimized by quoting Q = P. Using the fact that any differentiable proper scoring rule on a finite sample space X is the gradient of a concave homogeneous function, we consider when such a rule can be local in the sense of depending only on the probabilities quoted for points in a nominated neighborhood of x. Under mild conditions, we characterize such a proper local scoring rule in terms of a collection of homogeneous functions on the cliques of an undirected graph on the space X. We also mention proper scoring rules for continuous distributions on the real line. Here we allow further dependence on a finite number m of derivatives of the density at the outcome, and describe a large class of such m-local proper scoring rules.
  • Time: 8:30am - 9:30am, Thursday June 25

Gerhard Kramer (Tech. Univ. München): Upper Bounds on the Capacity of Fiber Channels
  • Abstract: The capacity of optical fiber channels seems difficult to compute or even bound. The best capacity lower bounds are based on numerical simulations using the split-step Fourier method. We review a recent capacity upper bound that applies two basic tools to this method: maximum entropy under a correlation constraint and Shannon’s entropy power inequality (EPI). The main insight is that the non-linearity that is commonly used to model optical fiber propagation does not change the differential entropy of a signal. As a result, the spectral efficiency of fiber is at most log(1+SNR), where SNR is the receiver signal-to-noise ratio. The results extend to other channels, including multi-mode fiber.

  • Time: 8.30am - 9.30pm, Friday June 26



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