NA Digest Monday, June 10, 2013 Volume 13 : Issue 24

Today's Editor:
Daniel M. Dunlavy
Sandia National Labs

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From: "Chetan Jhurani" <>
Date: Sat, 1 Jun 2013 11:25:13 -0700
Subject: TxSSA: A matrix sparsification algorithm and library, v1.0

Correction: The following announcement is a correction of one from
last week. The complete, correct announcement is listed below.

We announce the release of TxSSA library, version 1.0. TxSSA is an
acronym for Tech-X Corporation Sparse Spectral Approximation. The
library has interfaces in C++, C, and MATLAB, and is an implementation
of a newly designed matrix sparsification algorithm. It takes a
general real or complex matrix as input and produces a sparse output
matrix of the same size. The non-zero entries are chosen to minimize
changes to the singular values and singular vectors corresponding to
the near null-space. The output matrix is constrained to preserve
left and right null-spaces exactly. The sparsity pattern of the
output matrix is automatically determined or can be given as input.
The library is intended for sparsifying dense matrices of size up to a
few thousands.

If the input matrix belongs to a common matrix subspace, the generated
sparse matrix belongs to the same subspace automatically. This holds
for matrices that are Hermitian, complex-symmetric, skew-Hermitian,
and for a some other less common ones.

The source code and a few precompiled binaries are available at
Two relevant preprints and a publication are kept here

The development was partially supported by US Department of Energy
SBIR Grant DE-FG02-08ER85154. Comments and contributions are welcome.

Chetan Jhurani and Travis Austin
Tech-X Corporation, Boulder.


From: NUMTA2013 <>
Date: Fri, 7 Jun 2013 19:01:17 +0200
Subject: NUMTA2013, Italy, Jun 2013

Numerical Computations: Theory and Algorithms
Mathematics SIAM)
June 17 - 23, 2013
Eurolido Hotel, Falerna (CZ), Tyrrhenian Sea, Italy

The NUMTA2013 Conference is organized jointly by the University of
Calabria, Department of Computer Engineering, Modelling, Electronics
and Systems Science, Italy, and by the N.I. Lobachevsky State
University of Nizhni Novgorod, Russia, in cooperation with the Society
for Industrial and Applied Mathematics (SIAM), USA.

The goal of the Conference is to create a multidisciplinary round
table for an open discussion on numerical modeling nature by using
traditional and emerging computational paradigms. The Conference will
discuss all aspects of numerical computations and modeling from
foundations and philosophy to advanced numerical techniques. New
technological challenges and fundamental ideas from theoretical
computer science, linguistic, logic, set theory, and philosophy will
meet requirements and new fresh applications from physics, chemistry,
biology, and economy.

Researchers from both theoretical and applied sciences are very
welcome to follow the plenary/tutorial/regular talks and to use this
excellent possibility to exchange ideas with leading scientists from
different research fields. Summer school / Conference participants
(without presentation) registration fee is Euro 200.


From: Wolf-Juergen Beyn <>
Date: Sun, 9 Jun 2013 10:37:49 +0200 (CEST)
Subject: Nonlinear Waves, Germany, Jun 2013

The Department of Mathematics and the Collaborative Research Center 701
at Bielefeld University organize a Workshop

'Nonlinear Waves' June 19, 2013
Bielefeld University, V2-210-216

Speakers: Richard Kollar (Bratislava), Yuri Latushkin (Columbia MO),
Stefan Steinerberger (Bonn) and others

For more details see
or contact one of the organizers
Wolf-Juergen Beyn beyn(at)math(dot)uni-bielefeld(dot)de
Sebastian Herr herr(at)math(dot)uni-bielefeld(dot)de


From: Jiguang Sun <>
Date: Tue, 4 Jun 2013 07:11:29 -0400
Subject: Extended Deadline: NA and Inverse Problems, USA, Aug 2013

Copper Country Workshop on Numerical Analysis and Inverse Problems

Michigan Technological University, Houghton, Michigan
Aug. 12-14, 2013

The workshop intends to bring leading researchers to discuss the
recent developments on numerical analysis, scientific computing, and
inverse problems. It also seeks to build collaboration among the

Contributed presentations are invited in areas consistent with the
conference themes, which include but are not limited to inverse
scattering problem, finite element method, discontinuous Galerkin
method, imaging, regularization schemes, etc. Those interested in
giving a contributed talk must submit a title and a brief abstract not
to exceed one page by email to

Title and abstract submission deadline: June 30, 2013

Michigan Technological University is located in Houghton, Michigan.
Houghton's summer climate tends to be especially pleasant, as hot
temperatures are often moderated by the cool waters of the nearby Lake
Superior. It is definitely one of the best places to stay in August.


From: Thomas Dickopf <>
Date: Fri, 7 Jun 2013 08:02:58 -0400
Subject: Domain Decomposition Methods, DD22, Switzerland, Sep 2013

Registration is now open for the

22nd International Conference on Domain Decomposition Methods (DD22),
Lugano, Switzerland, September 16-20, 2013, hosted by the Institute of
Computational Science (ICS) of the Università della Svizzera italiana
(USI - University of Lugano)


15.06.2013 - applications for student support
21.06.2013 - individual contributions (posters, contributed and MS talks)
30.06.2013 - early registration discount


From: "L.G.Casado" <>
Date: Wed, 05 Jun 2013 13:55:37 +0200
Subject: Deadline June 30, HPCO-2013, France, Oct 2013

Workshop on High-Performance Computing and Optimization

High-performance computing is very important for optimization. Large
practical optimization problems unsolvable with a single computer due to
the limited time always exist. Therefore, high-performance computers and
distributed computing systems are very helpful. On the other hand
optimization is helpful to high-performance computing in a broader scope
allowing efficient exploitation of resources. This workshop aims to
bring together researchers interested in both high-performance computing
and optimization to discuss recent trend in the area.

Topics: Parallel and distributed optimization algorithms; Parallel
global optimization; Parallel branch and bound; Parallel
metaheuristics; Parallel multicriteria optimization; Hierarchical
optimization algorithms; Efficient exploitation of parallel and
distributed systems; Optimization for cloud resource management;
Applications of parallel and distributed optimization

Important Dates
June 30: full paper (not more than 8 pages) submission deadline
July 15: notification of acceptance
July 19: registration for the conference
July 31: final manuscript submission at IEEE CPS system
October 28-30: 3PGCIC conference

Authors whose papers have been accepted and presented at 3PGCIC
conference will be invited to submit their extended and revised papers
to international journals, including Informatica (IF 1.627).


From: Pamela Bye <>
Date: Fri, 7 Jun 2013 04:54:36 -0400
Subject: IMA Early Career Mathematicians, UK, Nov 2013

Early Career Mathematicians' Conference Autumn 2013
Saturday 16th November 2013, University of Strathclyde, Glasgow

The IMA Early Career Mathematicians' 2013 Autumn Conference will take
place on Saturday 16th November 2013 at the University of Strathclyde,
Glasgow. The conference aims to bring together Mathematics students
and Mathematicians in the early stages of their careers, from both
academia and industry, for a day of entertaining activities and talks
from a range of people with a variety of backgrounds and interests.

This ever popular event is open to anybody with an interest in maths
and is a great opportunity to meet Mathematicians from around the
country at similar stages in their careers to you, and maybe even
discover a career option that you had never considered before!

Jacqueline Bishop AMIMA, Conference Leader, IMA Early Career
Mathematicians' Autumn Conference 2013

Details of activities and speakers will be made available shortly via
the conference webpage:

To register your interest or for further information on this
conference, please contact the Conference Office at or +44 (0) 1702 354020


From: Kirsten Wilden <>
Date: Tue, 4 Jun 2013 14:52:41 +0000
Subject: Deadline Extended: SIAM GD/SPM13, USA, Nov 2013

SIAM Conference on Geometric and Physical Modeling (GD/SPM13)
The Curtis, A DoubleTree by Hilton Hotel, Denver, Colorado, USA
November 11-14, 2013

The Call for Presentations for this conference is available at:

Twitter hashtag: #GDSPM13


Due date for minisymposium proposals: July 1, 2013 DEADLINE EXTENDED!

Due date for abstracts of all contributed and minisymposium
presentations: July 1, 2013

Please visit for
detailed submission information.

For additional information, contact the SIAM Conference Department


From: Ronald Cools <>
Date: Thu, 6 Jun 2013 04:22:47 -0400
Subject: Monte Carlo and Quasi-Monte Carlo, Belgium, Apr 2014

The 11th International Conference on Monte Carlo and Quasi-Monte Carlo
Methods in Scientific Computing (MCQMC 2014) will be held in Leuven,
Belgium, April 6-11, 2014.

The web site http:// is now live. To
receive further announcements please go the web site, click on the
"Subscribe to the mailing list" button, and sign up.

MCQMC is a biennial conference devoted to Monte Carlo and quasi-Monte
Carlo methods and their interactions and applications. (In brief,
quasi-Monte Carlo methods replace the random choices that characterize
the Monte Carlo method by well chosen deterministic choices.) For
more information, click on the "About" tab on the web site.

The confirmed plenary speakers are
Timo Aila (Finland)
Steffen Dereich (Germany)
Peter Glynn (USA)
Makoto Matsumoto (Japan)
Harald Niederreiter (Austria)
Erich Novak (Germany)
Christian Robert (France)
See the web site for more information.

The web site includes a call for special sessions.
Later there will be a call for contributed talks.


From: Michael Ng <>
Date: Mon, 3 Jun 2013 20:54:30 -0400
Subject: SIAM Conference on Imaging Science, Hong Kong, May 2014

SIAM Conference on Imaging Science (SIAM-IS14)
12-14 May 2014
Hong Kong Baptist University

Invited Speakers:
Antonin Chambolle (Ecole Polytechnique, France)
Michael Elad (Technion, Israel)
Leo Grady (HeartFlow, USA)
Yi Ma (Microsoft Research Asia)
Carola-Bibiane Schnlieb (University of Cambridge, United Kingdom)
Rebecca Willett (Duke University, USA)

Call for Minisymposia, Minitutorials, Presentations and Posters:

Student/Post-doc Travel Awards Application
Deadline: 30 October 2013

Barbara Kaltenbacher (University of Klagenfurt, Austria)
Michael Ng (Hong Kong Baptist University, China)
Fadil Santosa (University of Minnesota, USA)


From: Jichao Zhao <>
Date: Wed, 5 Jun 2013 05:47:18 -0400
Subject: Postdoc Position, Bioengineering Inst, New Zealand

Postdoctoral Research Fellow, Auckland Bioengineering Institute

We have funding for a


From: Julian Shillcock <>
Date: Mon, 10 Jun 2013 09:01:04 -0400
Subject: Postdoc Position, Mesoscale Neuron Synthesis, EPFL

The Blue Brain Project (BBP), led by Prof. Henry Markram, is looking
for a Post-Doctoral Fellow to extend the synthesis of in silico
cortical tissue from the microscale to the macroscale.

BBP has modeling infrastructure for constructing neocortical columns
containing about 30,000 morphologically-detailed neurons. Several such
columns have already been assembled into a planar hexagonal mosaic
containing up to 1,000,000 neurons. The next stage of development is
to populate three-dimensional mesh models of brain regions from
existing atlases with appropriately-shaped mesocircuits, adjusting
their dimensions and shape to match rodent brain anatomy, and
connecting the circuits via axonal tracts according to known
large-scale connectomics data, yielding a complete rat brain model
containing on the order of tens of millions of neurons.

Please see this link for more details:


From: Aydin Buluc <>
Date: Mon, 3 Jun 2013 13:18:25 -0700
Subject: Postdoc Position, Berkeley Lab

The Future Technologies Group of the Berkeley Lab's Computational
Research Division has an immediate opening for a postdoctoral
researcher to work on research in energy efficient graph analysis and
data mining.

This project will explore methods to increase the energy efficiency of
parallel graph algorithms and data mining tasks. A new family of
algorithms will be developed to drastically reduce the energy
footprint and running time of the graph and sparse matrix computations
that form the basis of various data mining techniques. This appointee
will be part of an experienced research team and will be supported
through a long-term DOE research grant. Deliverables will include
prototype software implementations and publications targeted at
top-tier research conferences and journals.

More information can be found in this flyer:

Applications are accepted until the position is filled, and can be
done here:


From: "Di Napoli, Edoardo" <>
Date: Mon, 10 Jun 2013 07:10:17 +0000
Subject: Postdoc Position, Juelich Aachen Research Alliance (JARA), Germany

One Research Associate position is available within the Simulation
Laboratory Ab-Initio Methods in Chemistry and Physics of the
Jülich-Aachen Research Alliance (JARA,<>)

Requirements: the applicant is expected to have a Ph.D. in chemistry
or physics with a quantum-theoretical background. He/she should have a
deep knowledge in ab initio electronic-structure theory and an
in-depth understanding of computer-based methods, especially in the
context of high-performance computing. The candidate should be
familiar with the development and enhancement of existing simulation
software, have a thorough knowledge of programming languages such as
Fortran90, C / C + +, and in the parallelization of computer
codes. Adequate language skills in German and English are required.

Conditions: the candidate will work in an interdisciplinary team with
close contacts to scientists from other Simulation Labs at RWTH Aachen
and Forschungszentrum Jülich. Places of work will be both RWTH Aachen
University and Forschungszentrum Jülich. The position will be occupied
as soon as possible for a period of 2 years. It is a full-time
position with a salary according to TV-L.

Applications and contacts: please submit your application in both
paper and electronic format including a cover letter that indicates
your main area of interest, your CV, information on previous research,
university diplomas, and comprehensive score records before July 15,
2013 to

Michaela Bleuel
JARA-HPC, RWTH Aachen University Schinkelstraße 2 D-52062 Aachen

For more information please see the full announcements at
(English Language)
(German Language)


From: Simone Goettlich <>
Date: Fri, 7 Jun 2013 04:05:12 -0400
Subject: Postdoc Position, RWTH Aachen Univ and Mannheim Univ

The Department of Mathematics at the RWTH Aachen University and the
School of Business Informatics and Mathematics at the University of
Mannheim offer 2 PostDoc Positions (100%, TVL 13) within a third-party
funded project. The positions will start at the earliest possible date
(preferably July 1, 2013) and run for two years each with a possible
extension for another year. A limited amount of money for traveling as
well as equipment is available.

The postdocs will work in a joint research project on “Kinetic
Equations in Production Processes and Optimization Issues”. The
project contains a modeling and analysis part (Prof. Dr. Michael
Herty, RWTH Aachen, Germany) as well as numerical analysis and
optimization part (Prof. Dr. Simone Göttlich, University of Mannheim,
Germany). An industrial partner can provide some data for the
project. It is planned to derive new kinetic equations, to analyze
arising moment systems, to formulate optimization problems and discuss
them analytically and numerically. In the optimization part a
combination of continuous and discrete methods will be employed in
order to treat the arising problems.

Applicants should have a background in hyperbolic equations and
preferable also optimization as well as programming skills. German
language skills are helpful, but not necessary.

Applicants who feel they possess the above qualifications and
qualities are strongly encouraged to apply. Please send your
electronic application (curriculum vitae, list of publications, copies
of certificates) as a pdf file to:

• Prof. Dr. Michael Herty (
• Prof. Dr. Simone Göttlich (

Please contact us for further information about the position.

End of NA Digest