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Workshops, Conferences & Events

The Interdisciplinary Center for Scientific Computing (IWR) and its affiliated institutions organize a large number of events for discussing latest scientific results as well as identifing upcoming challenges in the field of Scientific Computing. In addition the IWR regularly hosts events which emphasis on broadening and improving the interdisciplinary dialogue.

Archive: 2016, 2015, 2014, 2013, 2012, 2011, 2010-2000


Talk / Special Interest Group “Mathematics of Life”

"Modelling glioma growth with fully anisotropic diffusion"

Prof. Thomas Hillen • University of Alberta, Canada
June 6, 2017 • 11:00

The human brain has a complex geometric structure consisting of white and gray matter, blood vessels, ventricles, skull etc. It forms a highly anisotropic medium. Glioma in the brain are known to invade along white matter tracks and along other brain structures. Using diffusion tensor imaging (DTI) it is now possible to obtain directional information of the brain geometry. In my talk I will show how this DTI information can be used to parametrize a fully anisotropic diffusion equation for glioma spread. We validate the model on clinical data of glioma patients and discuss the future use in treatment design. (joint work with A. Swan, K.J. Painter, C. Surulescu, C. Engwer, M. Knappitsch, A. Murtha).

Followed by: “Meet the speaker” in the common room (with drinks and canapes)

“Mathematics of Life” is a special interest group organized by doctoral students of the HGS MathComp.

Location: Mathematikon • Conference Room / 5th Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg

IWR-Colloquium Summer Term 2017

"Deep Learning with Dense Connectivity"

Prof. Kilian Weinberger • Cornell University, USA
May 31, 2017 • 16:15

Although half a decade has passed since Frank Rosenblatt’s original work on multi-layer perceptrons, modern artificial neural networks are still surprisingly similar to his original ideas. In this talk I will give a brief introduction on deep neural networks and will question one of their most fundamental design aspects. As networks have become much deeper than had been possible or had even been imagined in the 1950s, it is no longer clear that the layer by layer connectivity pattern is a well-suited architectural choice.
In the first part of the talk I will show that randomly removing layers during training can speed up the training process, make it more robust, and ultimately lead to better generalization. We refer to this process as learning with stochastic depth -- as the effective depth of the networks varies for each minibatch.
In the second part of the talk I will propose an alternative connectivity pattern, Dense Connectivity, which is inspired by the insights obtained from stochastic depth. Dense connectivity leads to substantial reductions in parameter sizes, faster convergence, and further improvement in generalization. Finally, I will show examples of problems that were considered challenging but have become surprisingly easy in the light of deep learning.

Location: Mathematikon • Conference Room / 5th Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg


"Massively parallel radiation transport simulations - Current status and challenges ahead"

Prof. Jean Ragusa • Texas A&M University, USA
May 18, 2017 • 16:15

In this talk, I will provide an overview of solution techniques and iterative techniques employed to solve the first-order form of the radiation transport equation on massively parallel machines. A review of scaling efficiency for transport sweeps (up to order 1-million processes) will be provided for logically Cartesian grids. Challenges posed by the need to move to unstructured (load-unbalanced) grids and ongoing research will be discussed. Diffusion-based synthetic accelerators for the one-speed (within-group) and multigroup transport equations will be presented and issues related to massively parallel diffusion-accelerated transport sweeps be analyzed.

Location: Mathematikon • Seminar Room 11 • Im Neuenheimer Feld 205 • 69120 Heidelberg

IWR-Colloquium Summer Term 2017

"Digital Humanities - Shaping New Avenues of Scholarly Research"

Prof. Heather Richards-Rissetto • University of Nebraska-Lincoln, USA
May 10, 2017 • 16:15

The Center for Digital Research in the Humanities (CDRH) at the University of Nebraska-Lincoln (UNL) - founded in 2005 - was one of the earliest Digital Humanities (DH) centers in the world, and is supported by the University as a Center of Excellence as well as by private funds and grants. The Center is a founding member of centerNet, an international network of digital humanities centers, and is an institutional member of the TEI Consortium, the National Humanities Alliance, and the National Humanities Alliance. While the Center’s roots are in Library Science and English, the mission of CDRH is to promote collaborative and transdisciplinary digital humanities research. The Center houses over fifty scholarly projects ranging in scale, topic, and purpose. In the first part of the talk, I will present an overview of these diverse projects, some of their challenges, and their wide-spread impact in the humanities and beyond.

In the second half, I will focus specifically on Digital Cultural Heritage (DCH). Recent DH cluster hires in Anthropology, Classics & Religious Studies, History, and Art & Art History at UNL are facilitating innovative research in DCH. In particular, CDRH scholars are applying and developing Geographic Information Systems (GIS), 3D Modeling, and Virtual Reality (VR) methods and tools to foster new avenues of scholarly research. Underlying much of this research is the need to unite quantitative and qualitative data—requiring new computational methods and 3DGIS tools. I will present some of my experiences, outcomes, and ongoing challenges for three DCH projects — MayaArch3D (2009-2015), MayaCityBuilder (2016-present), and Keeping Data Alive (2017-present) - situating them within the larger framework of Digital Humanities.

Location: Mathematikon • Conference Room / 5th Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg

IWR-Colloquium Summer Term 2017

"Swarming, Interaction Energies and PDEs"

Prof. José A. Carrillo de la Plata • Imperial College London, UK
May 5, 2017 • 14:15

I will present a survey of the main results about first and second order models of swarming where repulsion and attraction are modeled through pairwise potentials. We will mainly focus on the stability of the fascinating patterns that you get by random particle simulations, flocks and mills, and their qualitative behavior. Qualitative properties of local minimizers of the interaction energies are crucial in order to understand these complex behaviors. Compactly supported global minimizers determine the flock patterns whose existence is related to the classical H-stability in statistical mechanics and the classical obstacle problem for differential operators.

Location: Mathematikon • Conference Room / 5th Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg


"Nuclear Shape, ELCS and Epichromatin"

Prof. Donald E. Olins & Prof. Ada Levy Olins • University of New England, USA
April 24, 2017 • 16:15

Cell nuclei are not always spherical; some are highly irregular. The structural basis for this multiplicity of shapes appears to derive from the components of the nuclear envelope and their interactions with cytoskeletal elements. Describing these shapes mathematically is a challenge; explaining their biochemical origin remains a mystery. The goal of this seminar is to discuss aspects of these problems and to provoke comments and ideas from the audience.

Website Prof. Donald E. Olins

Website Prof. Ada Levy Olins

Location: Mathematikon • Conference Room / 5th Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg


"Bangkok Summer School on Applied Mathematics & Computational Science"

March 20-24, 2017

The Bangkok Summer School on Applied Mathematics & Computational Science, jointly organized by Chulalongkorn University and Interdisciplinary Center for Scientific Computing (IWR) of Heidelberg University, will take place from 20th-24th March 2017 at the heart of Bangkok in Thailand’s most prestigous university- Chulalongkorn. The summer school will be conducted by leading experts from the two most renowned universities of Asia and Europe.

The summer school is designed for postgraduate students, young researchers and scientists in the field of applied mathematics and numerical methods. All lectures start at the postgraduate level and give short introductions to the general theory in the field, specializing in more specific topics during the lecture.

The Bangkok Summer School on Applied Mathematics & Computational Science provides a perfect opportunity for you to meet with all the leading experts in the field of Scientific Computing.

For more information please visit the website of the summer school.


"Analytical approximations for spatial stochastic gene expression in single cells and tissue"

Dr. Ramon Grima • University of Edinburgh, UK
March 8, 2017 • 11:00

Gene expression occurs in an environment in which both stochastic and diffusive effects are significant. Spatial stochastic simulations are computationally expensive compared to their deterministic counterparts and hence little is currently known of the significance of intrinsic noise in a spatial setting. I will show how starting from the reaction-diffusion master equation (RDME) describing stochastic reaction-diffusion processes, we can derive closed-form expressions for the approximate steady-state mean concentrations which are explicit functions of the dimensionality of space, rate constants and diffusion coefficients. These are generally different from those given by the deterministic theory of reaction-diffusion processes, thus highlighting the importance of intrinsic noise. Our theory is confirmed by comparison with stochastic simulations, using the RDME and Brownian dynamics, of two models of stochastic and spatial gene expression in single cells and tissues. Lastly, time permitting, I will discuss how one can extend these results to stochastic spatial simulations of intracellular processes which take into account macromolecular crowding, namely the volume exclusion due to the finite size of molecules.

Discussion with the speaker after the talk (at around 12:00), coffee will be provided.

Location: Mathematikon • Lecture Hall (Room 00.005) / Ground Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg

ZUK 5.4 Workshop

"CAA17 - Computeranwendungen und Quantitative Methoden in der Archäologie"

10. - 11. Februar 2017


  • Technologien von 3D-Laserscan-Verfahren bis hin zu Archäoinformationssystemen
  • Interdisziplinäre Verbindung von Archäologie und wissenschaftlichem Rechnen
  • Methoden zur computergestützten Analyse archäologischer Befunde
  • Einfluss von Open Access und Verbindungen mit Open Data
  • Perspektiven der Lehre und Nachwuchsförderung 


  • Prof. Reinhard Förtsch, Deutsches Archäologisches Institut (DAI)

Gemeinsame Veranstaltung der AG Computer-Anwendungen und Quantitative Methoden in der Archäologie (CAA) und des Zukunftskonzepts der Universität Heidelberg – Massnahme 5.4 „Wissenschaftliches Rechnen“.

Veranstaltungsort: Mathematikon • Seminarräume A+B & Hörsaal • Im Neuenheimer Feld 205 · 69120 Heidelberg

IWR-Colloquium Winter Term 2016 / 2017

"Music Information Retrieval - When Music meets Computer Science"

Prof. Meinard Müller • International Audio Laboratories Erlangen (AudioLabs), Fraunhofer IIS & Friedrich-Alexander-Universität Erlangen-Nürnberg
February 1, 2017 • 16:15

Significant digitization efforts have resulted in large music collections, which comprise music-related documents of various types and formats including text, symbolic data, audio, image, and video. In the field of music information retrieval (MIR) great efforts are directed towards the development of technologies that allow users to access and explore music in all its different facets. For example, during playback of some CD recording, a digital music player may present the corresponding musical score while highlighting the current playback position within the score. On demand, additional information about melodic and harmonic progression or rhythm and tempo is automatically presented to the listener. A suitable user interface displays the musical structure of the current piece of music and allows the user to directly jump to any key part within the recording without tedious fast-forwarding and rewinding. In this talk, I discuss a number of current research problems in the field of music information retrieval and indicate possible solutions. One fundamental problem is to decompose a given music signal into semantically meaningful components. To guide the decomposition, one may exploit additional information, either in the form of specific acoustic properties of the components or in the form of additional score information. As an example, I show how to compute a notewise decomposition of a music signal by applying a score-informed variant of non-negative matrix factorization (NMF). Finally, I discuss various audio editing and manipulating applications to highlight the potential of these decomposition techniques.

Location: Mathematikon • Conference Room / 5th Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg

IWR-Colloquium Winter Term 2016 / 2017

"Finite dimensional state representation of linear and nonlinear delay systems"

Prof. Mats Gyllenberg • University of Helsinki, Finland
January 11, 2017 • 16:15

We consider the question of when delay systems, which are intrinsically infinite dimensional, can be represented by finite dimensional systems. Specifically, we give conditions for when all the information about the solutions of the delay system can be obtained from the solutions of a finite system of ordinary differential equations. For linear autonomous systems and linear systems with time-dependent input we give necessary and sufficient conditions and in the nonlinear case we give sufficient conditions. The ideas and results are illustrated by models for infectious diseases and physiologically structured populations.

Location: Mathematikon • Conference Room / 5th Floor • Im Neuenheimer Feld 205 • 69120 Heidelberg
Last Update: 23.05.2017 - 11:47

Upcoming Events

All Events (IWR-Calendar)

2017 / 2018

4. Juli 2017
65. Heidelberger Bildverarbeitungsforum
Thema: Embedded Vision Systeme - Leistungsfähigkeit und Programmierung

10. Oktober 2017
66. Heidelberger Bildverarbeitungsforum
Thema: Mensch-Maschine Interaktion mit Vision

12. Januar 2018
Heidelberger Bildverarbeitungsforum
Thema: "Festveranstaltung – 10 Jahre HCI"

6. März 2018
Heidelberger Bildverarbeitungsforum
Thema: "3D+ Bildanalyse und -visualisierung"