# Inverse Problems and Data Assimilation Wiki and International Community

news_2013_6

## News Archive 2013/6 (Oct-Dec 2013)

A chronological list of workshops and conferences can be found at events! New Positions are announced under Researchers and Groups.

### GPS/GNSS Tomography for Atmospheric Sciences Special Session at EGU

Dec 16, 2013. Dear Colleague, The next General Assembly of the European Geosciences Union will be held in Vienna, Austria, 27 April – 02 May 2014. We draw your attention to session G5.2 titled “Atmospheric Remote Sensing with Space Geodetic Techniques” chaired by us. The corresponding session abstract is included at the end of this mail and it can also be found at http://meetingorganizer.copernicus.org/EGU2014/session/14165 We invite you to contribute actively to the session by submitting abstracts. Notice that the DEADLINE FOR ABSTRACT SUBMISSION IS JANUARY 16, 2014. Here is a link about how to submit an abstract: abstract submission. With kind regards and best wishes for you and your family during the seasonal holidays. We are looking forward to welcoming you in Vienna! Rosa Pacione and Henrik Vedel.

Session Abstract.

The ability to do atmospheric sensing of the neutral atmosphere (troposphere
and stratosphere) by space geodetic techniques has improved considerably over
the last decade as a result of technological advances, larger regional and
global ground-based networks, satellite-based   missions and developments of
appropriate models and algorithms. Water vapour is under sampled in current
operational meteorological and climate observing systems. Advancements in
Numerical Weather Prediction (NWP) Models (higher resolution and hourly
cycling update), to improve forecasting of extreme precipitation, requires
GNSS observations with better timeliness as well as spatial and temporal
resolution, than currently available. The existence of more than 15 years of
homogeneously reprocessed observations from permanent GNSS stations worldwide
has high potential for monitoring trends and variability in atmospheric water
vapour which will enable evaluation of systematic biases from a range of
instrumentation, improve the knowledge of climatic trends of atmospheric
water vapour and also be of benefit to global and regional NWP reanalyses
and climate model simulations. NWP data has recently been used for deriving
improved mapping functions. In Real-Time GNSS processing there is currently
an interest in using atmospheric NWP data to initialise Precise Point
Positioning (PPP) processing algorithms which can provide shorter convergence
time and improve positioning. We welcome contributions on the subjects below,
but notice that also other subjects are welcome: Physical modelling of the
neutral atmosphere using ground-based and radio-occultation data. Multi-GNSS,
Real-Time and reprocessed tropospheric products. Studies on how to mitigate
atmospheric effects for improving GNSS positioning and navigation, as well
as observations at radio wavelengths. Technique validation, inter-technique
comparisons and inter-system calibration. Usage of GNSS measurements in
weather forecasting (e.g., NWP and now-casting) and in climate
monitoring. Usage of NWP data in PPP processing algorithms.

### 10th AIMS conference on Dynamical Systems, Differential Equations and Applications

Dec 5, 2013. Altogether, over 100 symposia have been organized and a “Student Paper Competition” is set up for the 10th AIMS conference on Dynamical Systems, Differential Equations and Applications, to be held at Madrid, Spain, July 7-11, 2014. In particular, there are four special sessions on inverse problems, compare Special Sessions. Invited main speakers: Nalini Anantharaman, Diego Cordoba, Ingrid Daubechies, Weinan E, Charles L. Fefferman, Bernold Fiedler, Zhiming Ma, Philip Maini, Sylvia Serfaty, Carles Simo, Cedric Villani, Amie Wilkinson. The 9th conference (Orlando, 2012) proceedings was published at Conference Publications.

You are cordially invited to participate in the Madrid meeting and submit an article to AIMS journals. We will do our best to ensure a swift editorial process. Over the years all leading researchers in the fields have published with AIMS journals, including 7 Fields medalists. For your convenience and research needs, we are making the recent volumes of all AIMS journals access free, for two weeks, at http://aimsciences.org/.

### The 6th EnKF Workshop, 19-22 May 2014

Dec 3, 2013. On behave of the organizing committee, Peter Houtekamer and I are pleased to announce that the 6th EnKF Data Assimilation Workshop will be held at the Beaver Hollow Conference Center (http://www.beaverhollow.com/) just outside of Buffalo, New York. The dates of the workshop will be May 18-22, 2014 arriving on the 18th for dinner and departing the afternoon of 22nd. This will be the sixth in a series of relaxed workshops on the EnKF with emphasis on the atmospheric applications from convective to global scales, including hybrid, coupling and comparison to traditional variational methods. We hope that many of you will be able to attend. We are extending this from the past 2.5 days to 3.5 days to allow more talks given the increased participation and growing ranges of subject areas of interests.

Some rationale for the change in workshop location: Given the Albany/Rensselaerville conference facility is maximized last time, and with expected demands for more seats/rooms for the workshop, I have done some extensive search for similar venues but with more space and rooms. For the past couple of weeks, I have been investigating and negotiating with this conference resort in NY state but near Buffalo and Niagara Falls. Some of the information from this resort is attached below. I went for an exploratory trip last weekend and spent in the resort for the night. The resort can hold more than 150 guests and the facility, food, hotel, meeting, and dinning rooms and recreations are very impressive. The price in the forwarded contract is reasonable though tentative. You can check out their website at: www.beaverhollow.com It is about half an hour drive from the Buffalo, NY airport or 2 hours from Toronto airport.

At this point, we are looking to get an initial head count since I will need to work with the resort to finalize a contract for how many rooms they can to guarantee for us, and how many we can need. The primary announcement of the workshop goes to the past attendees. You may get multiple copies of email if you are on both lists. For those whose name appeared on the list for the first time, you were added either based on your request or recommendation from one of the veterans in the past. Feel free to suggest other colleagues you think would be interested in the workshop but, since space in the meeting room is limited, please do not forward this message directly to others.

Please reply to my new colleague Prof. Steven Greybush (who is cc'd and will be handling the workshop logistics and abstracts) and me if you, your students or postdocs will be attending. Please be specific on how many people will be attending from your group, their names and email addresses so we can inform them in subsequent announcement. Please do not call the conference center to make reservations just yet.

The agendas and talks from the previous four workshops of 2006, 2008, 2010 and 2012 can be accessed at

Besides Peter and me, our organizing committee includes

Jeffrey Anderson jla@ucar.edu
Craig Bishop Craig.Bishop@nrlmry.navy.mil
Neill Bowler neill.bowler@metoffice.gov.uk
Steven Greybush sjg213@psu.edu
Kayo Ide ide@umd.edu
Takemasa Miyoshi takemasa.miyoshi@riken.jp
Ryan Torn rtorn@albany.edu
Jeff Whitaker Jeffrey.S.Whitaker@noaa.gov
Ming Xue mxue@ou.edu
Jiang Zhu jzhu@mail.iap.ac.cn

Steve will be handling the workshop logistics including maintaining email list, tracking head counts, and handling abstract submissions. Please let Steve and me know if you have questions and concerns. Please also send your suggestions about the workshop based on your past experiences.

Fuqing Zhang“ fzhang@psu.edu

### International Symposium on Data Assimilation 2014

Nov 27, 2013. Dear colleagues, it is our pleasure to invite you to the International Symposium on Data Assimilation 2014 that will take place 24-28 February 2014 at Ludwig-Maximilians-University in Munich, Germany. As in previous years, the symposium will include invited oral presentations by selected international experts, two extended poster sessions and extended periods for discussion. The symposium will be combined with

• a workshop on Cost Action ES1206 (GNSS Network) and
• a mini-workshop on KENDA/EPS.

For a detailed program please see the attached flyer FlyerPDF. For poster registration and detailed information about travel and venue, please visit the conference website at:

The deadline for registration and abstract submission is 15 January 2014. Please forward this announcement to people who may be interested. Apologies in case you receive it multiple times.

Looking forward to seeing you in Munich!

Dr. Martin Weissmann
Dr. Tijana Janjic-Pfander
Prof. Roland Potthast
Dr. Andreas Rhodin
Prof. George C. Craig

### Call for Papers: Special Issue Recent Theory and Applications on Inverse Problems 2014

Nov 27, 2013. The aim of this special issue is to present recent developments both in theoretical and practical areas for the solution of inverse problems which appear in physical and engineering applications. The scope of the issue not only covers a broad range of new studies but also includes attractive review articles on recent investigations.

Finding causes from the knowledge of their effects which actually constitutes the idea of solving inverse problems is necessary for the identifications of important practical applications such as mine detection, medical imaging, nondestructive testing, and geophysical explorations. Therefore, related new results are always of interest in industry and scientific communities. In this issue, we provide an opportunity to the investigators to meet all their readers in a short time with an advantage of open access journal.

The main focus of this issue will be on theoretical and numerical approaches which were introduced especially in recent decades related to the stable and rigorous solutions of inverse and ill-posed problems. Moreover, the special issue welcomes experimental contributions supported with theoretical and/or simulation results. According to fast progress of related areas, potential topics include, but are not limited to:

•	Inversions in fundamental and applied sciences
•	Regularization theory
•	Computational methods for inverse problems
•	Imaging techniques
•	Data analysis
•	Data assimilation
•	Biomedical applications
•	Nondestructive testing
•	Inverse problems in seismology
•	Inverse problems in underwater acoustics
•	Remote sensing
•	Parameter estimation problem
•	Inverse design
•	Integrated theoretical and experimental studies

Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/mpe/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/ according to the following timetable: Manuscript Due March 14, 2014 First Round of Reviews June 6, 2014 Publication Date August 1, 2014

Guest Editors
Valery G. Yakhno, Department of Electrical and Electronics Engineering, Dokuz Eylul University, 35160 Izmir, Turkey; valery.yakhno@deu.edu.tr; Caner Özdemir, Department of Electrical and Electronics Engineering, Mersin University, 33343, Mersin, Turkey; cozdemir@mersin.edu.tr; Tzu-Yang Yu, Department of Civil and Environmental Engineering, University of Massachusetts Lowell, MA 01854-2827, United States; tzuyang_yu@uml.edu; Roland Potthast, Department of Mathematics, University of Reading, Whiteknights, P.O. Box 220, Reading RG6 6AX, UK; r.w.e.potthast@reading.ac.uk

### Math of the Planet Earth: New Doctoral Training Centre with 76 PhD Studentships 2014-19

Nov 22, 2013. Climate change represents an urgent challenge for humanity. Quantifying uncertainty in long‐term climate prediction and estimating the potential strength of extreme meteorological events in the face of global warming are very difficult research questions, with large economic and societal impacts that will only grow in the future.

In response to this challenge, Imperial College London and the University of Reading have joined forces to create the EPSRC Centre for Doctoral Training (CDT) Mathematics of Planet Earth (MPE). Students in the MPE CDT will receive cohort-based PhD training in the mathematical and computational techniques needed to understand, predict and quantify risk and uncertainty for extreme weather and climate change. In particular, our PhD students will receive training which ranges from the data-driven domain represented by statistics, to the model-driven domain represented by analysis and mechanics.

This is the challenge that the CDT as a whole will address, and each student will be able to choose the particular areas of research that suit their individual taste and talents. The MPE CDT students will graduate with substantial, interdisciplinary experience in applying cutting-edge mathematics to challenging and urgent problems, and will have developed the teamwork, communication, management and leadership skills needed for a successful career.

The MPE CDT brings together Two world class academic centres, Imperial College London and University of Reading linked together via Grantham Institute for Climate Change External partners including world-leading weather and climate services based in the UK (including the Met Office and ECMWF) and leading national and international centres of research and doctoral training in weather and climate science Representatives of key commercial sectors, including energy, water, marine, and insurance, where there is large demand for our graduates.

For more details see http://mpecdt.org/. The full list of new Doctoral Training Centres in the UK can be found at EPSRC DTC List

### EGU: Inverse Problems and Data Assimilation in Geosciences

Nov 18, 2013. We would like to draw your attention to the session 'Inverse Problems and Data Assimilation in Geosciences' (session NP5.1, Programme Group 'Nonlinear Processes in Geosciences') to be held during the upcoming General Assembly of the European Geosciences Union (Vienna, Austria, 27 April – 02 May 2014).

This session will be devoted to all aspects of inverse problems and data assimilation in geophysics. A detailed description is given below.

The deadline for receipt of abstracts is 16 January 2014, 13:00 CET. An Abstract Processing Charge (APC) of €40 must be paid for each abstract submission.

Possibilities of financial support are available for young scientists, as well as for established scientists from low and lower middle income countries. Requests for financial support must be submitted, together with an abstract, by 29 November 2013.

General information on the General Assembly, in particular instructions for submitting abstracts and requests for financial support, is available at the address

http://www.egu2014.eu/ The direct link to session NP5.1 is http://meetingorganizer.copernicus.org/EGU2014/session/14420

### New Book: Large Scale Inverse Problems in the Earth Sciences

7. Nov. 2013. Large Scale Inverse Problems - Computational Methods and Applications in the Earth Sciences (2013) Edited by M. Cullen, M.A. Freitag, S. Kindermann and R. Scheichl Radon Series on Computational and Applied Mathematics 13 http://www.degruyter.com/view/product/182025

This book is the second in a three volume series recording the Radon Special Semester on “Multiscale Simulation & Analysis in Energy and the Environment” that took place in Linz, Austria, October-December 2011. This volume tries to highlight and address commonalities in the mathematical and computational procedures typically used in large-scale inverse problems and in data assimilation within different forefront applications.

The solution of inverse problems is fundamental to a wide variety of applications such as weather forecasting, medical tomography, and oil exploration. Regularisation techniques are needed to ensure solutions of sufficient quality to be useful, and soundly theoretically based. This book addresses the common techniques required for all the applications, and is thus truly interdisciplinary.

It records the achievements of Workshop 2 “Large Scale Inverse Problems and Applications in the Earth Sciences” that brought together theoretical experts in inverse problems and data assimilation with practitioners working on practical as well as theoretical aspects of large scale inverse problems that arise in the earth sciences.

### New Book: Direct and Inverse Problems in Wave Propagation and Applications

7. Nov. 2013. Direct and Inverse Problems in Wave Propagation and Applications Edited by I.G. Graham, U. Langer, J.M. Melenk, M. Sini (2013) Radon Series on Computational and Applied Mathematics 14 http://www.degruyter.com/view/product/182029

This book is the third volume of a three volume series recording the Radon Special Semester on “Multiscale Simulation & Analysis in Energy and the Environment” that took place in Linz, Austria, October-December 2011. This volume surveys recent developments in the analysis of wave propagation problems. The topics covered include aspects of the forward problem and problems in inverse problems, as well as applications in the earth sciences.

Wave propagation problems are ubiquitous in environmental applications such as seismic analysis, acoustic and electromagnetic scattering. The design of efficient numerical methods for the forward problem, in which the scattered field is computed from known geometric configurations is very challenging due to the multiscale nature of the problems. Even more challenging are inverse problems where material parameters and configurations have to be determined from measurements in conjunction with the forward problem. This book contains review articles covering several state-of-the-art numerical methods for both forward and inverse problems.

It records the achievements of Workshop 3 “Wave Propagation and Scattering, Inverse Problems and Applications in Energy and the Environment” that brought together key numerical mathematicians with an interest in analysis and computation of wave propagation problems with practitioners from engineering and industry.

### Mathematical Competitive Game 2013-2014

Nov 5, 2013. The Mathematical Competitive Game 2013-2014, organized jointly by the French Federation of Mathematical Games and Societe de Calcul Mathematique SA, is now open. It is endowed with 2,000 Euros of prizes. The topic for this year is: Checking an Industrial Process.

Please see: http://www.scmsa.eu/archives/SCM_FFJM_Competitive_Game_2013_2014.pdf for a complete description of the game. Answers should be sent no later than April 30th, 2014. Please inform your students and colleagues. Thank you for your interest

Prof. Bernard Beauzamy Chairman and CEO, Societe de Calcul Mathematique SA 111 Faubourg St Honoré 75008 Paris - France +33 1.42.89.08.91 assistante@scmsa.eu

### LMS meeting on "Sparse Regularisation for Inverse Problems"

Nov 2, 2013. Inverse problems appear in many situations in physics, engineering, biology and medicine. The main mathematical problem is the well (ill) – posedness of the inversion process. Indeed, in practice most inverse problems are ill-posed in terms of non-uniqueness or lack of stability of the inversion. This one-day meeting on 7 February 2014 is the first LMS meeting on inverse problems (in a series of four in 2014) that brings together UK researchers who work on advancing the field of inverse problems, both from a theoretical and from an applied point of view.

The meeting will concentrate on sparse regularisation of inverse problems. Regularisation is one major technique for the solution of ill-posed inverse problems. It imposes sufficient constraints on the solution to allow for a stable inversion. In recent years ideas from compressed sensing and sparse reconstruction have entered inverse problems research with the development of inversion models that feature a regularisation which imposes certain sparsity constraints on the solution. In particular, this meeting will concentrate around the major themes:

• Modelling of sparsity
• Non-smooth regularisation and geometric priors
• Sparse sampling
• Sparse regularisation in practice

This event is funded by the London Mathematical Society.

Speakers: Invited speakers will include:

Robert Aykroyd (University of Leeds), UK
Martin Benning (University of Cambridge), UK
Marta Betcke (UCL), UK
Martin Burger (University of Münster), Germany
Ke Chen (University of Liverpool), UK
Paul Childs (Gould Research Center, Schlumberger, Cambridge), UK
Anders Hansen (University of Cambridge), UK

### ESA Cloud CCI – Final Meeting Phase 1

Oct 28, 2013. The ultimate objective of Cloud CCI is to provide long-term coherent cloud property data sets exploiting the synergic capabilities of different Earth observation missions allowing for improved accuracies and enhanced temporal and spatial sampling better than those provided by the single sources.

This project seeks to utilize the increasing potential of the synergic capabilities of past, existing and upcoming European and US missions in order to meet the increasing needs for coherent long-term cloud property datasets required by the scientific community.

The website can be found at http://www.esa-cloud-cci.org/

The Final Meeting of Phase 1 of ESA Cloud CCI is Nov 11-13, 2013 in Offenbach, Germany. For an agenda see: Agenda. Among others there are talks on “optimal estimation theory for cloud retrieval”. The techniques are very close to regularization techniques for integral equations of the first kind.

### Understanding Uncertainty in Environmental Modelling

Oct 22, 2013. Dear Colleagues, we would like to draw your attention to the workshop “Understanding Uncertainty in Environmental Modelling” which is planned for 8-10 January at the London School of Economics.

This workshop for early-career researchers (PhD students, post-docs) in environmental modelling disciplines will present an overview of model evaluation methods, statistical inference for model output, and the use of models in risk management and decision-making, with the aim of exposing participants to a variety of methods and insights available in environmental modelling and encouraging critical evaluation of the approaches and methodologies used in their own research. The workshop will be structured around several themes, with facilitated discussion time and interactive problem-solving exercises, allowing participants to explore and understand the concepts presented by the expert lecturers. Please see the course website for further details.

Closing date for applications: November 15th

### Workshop on Parameter Estimation and Inverse Modelling for Atmospheric Composition

Oct 14, 2013. From 22 to 24 October 2013 ECMWF is organizing a workshop on Parameter Estimation and Inverse Modelling for Atmospheric Composition.

The modelling and data assimilation of atmospheric composition differs in several ways from the modelling and data assimilation for numerical weather prediction, such as the atmospheric chemistry, available observations, and the greater importance of mass conservation for long-lived tracers. However, another important aspect is the significance of the boundary conditions. Anthropogenic emissions, greenhouse gas surface fluxes, wild fire emissions, and volcanic eruptions form a significant part of the assimilation and forecasting problem, which can therefore not really be treated as an initial condition problem with a (almost) perfect model. The aim of the workshop is to explore the options to optimally define the boundary conditions in a near-real-time 4D-var data assimilation system for atmospheric composition. There is significant experience in the research community with flux inversions, estimating volcanic emissions, and optimizing emission estimates. An important question for the workshop is therefore how to combine existing forward models with inverse modelling techniques, e.g., through parameter estimation, in an operational environment.

The workshop is approaching fast, but we still have some room for additional participants. Full information (including programme) can be found at Webpage. If you would be interested to participate in this exciting workshop, please register through the web site before the end of this week.

For the organizing committee, Richard Engelen

Oct 14, 2013. On behalf of the WCCM-ECCM-ECFD2014 Organizing Committee, we are pleased to invite you to submit an abstract to any of the scheduled Minisymposia through the Congress website. The list of accepted Minisymposia and information about registration and abstract submission can be found at: http://www.wccm-eccm-ecfd2014.org/

Abstracts should outline the main features, results and conclusions as well as their general significance, and contain relevant references. The Abstract can be submitted directly in its final format, following the template available on the website. Authors will have the possibility of replacing the file by an updated version after the acceptance notification. Deadline for submission of abstracts is: November 29, 2013

### Advances in Neural Population Models and Their Networks

Oct 13, 2013. May we draw your attention to an Open Thematic Series (“special issue”) in the Springer open access journal EPJ Nonlinear Biomedical Physics: Advances in Neural Population Models and Their Networks. This special issue arises from two CNS*13 workshops (“Advances in Neural Mass Modelling” and “Full Brain Network Dynamics - Modelling, Analyses, Experiments”, respectively), but welcomes topical submissions from all areas of EEG-fMRI and biomedical imaging.

Deadline for submissions is 15 November 2013, and will not be moved. The full announcement can be found here as PDF, but is also reproduced below. If you have any questions please feel free to contact us via i.bojak@reading.ac.uk. As (guest) editors, we look forward to receiving your contributions to what promises to be an exciting special issue.

Best wishes, Ingo Bojak, Stephan van Gils and Sid Visser

Full announcement

Neural population models (NPMs) describe the overall behaviour of large ensembles of neurons. Various names have been used for this general approach according to mathematical and conceptual detail: neural mass models, mean field models, neural field models, cortical field theory, etc. Since not all neurons are modelled individually, a distinct advantage of these lumped models is the reduction in dimensionality of both the parameter and variable space, which reduces computation time and makes possible sophisticated mathematical analyses of the model?s behaviour as well as their application to experimental data. Nevertheless, NPMs retain their biological interpretability, allowing researchers to investigate a wide range of brain function in health and disease, as well as the effects of drugs and other extraneous influences.

Current non-invasive neuroimaging methods such as EEG, fMRI and MEG measure in various ways the activity of sizable groups of neurons, making their data a natural target for NPMs. Furthermore, thanks to the speed with which NPMs can be evaluated one can computationally match the ability of these modalities to record the activity of entire brains. In combination with rapid experimental progress in determining the large scale connectivity (the connectome), this is leading to novel NPM-based methods for the modelling of partial or even full brain networks. Typically such models are characterized by time delays via signal propagation along connecting fibres with NPMs as network nodes. They promise to make NPMs the tool of choice for neuroimaging analysis in the future.

Topics of interest for this thematic series include but are not limited to the following advances in neural population modelling:

1. the inclusion of neural mechanisms such as spike rate adaptation or bursting
2. the effects of higher order statistics on the dynamics
3. the formal and/or computational correspondence between microscopic and macroscopic models
4. adapting models for different regions of the brain
5. describing pathologies and drug effects
6. the development of new analytic tools for these systems
7. determining the effects of connectivity on dynamics
8. building partial and full brain networks
9. studying large scale brain dynamics in health and disease
10. addressing cognition through associated brain processes

Authors are cordially invited to submit original research papers on novel techniques, theoretical analyses and simulations, as well as applications to experiment and data analysis, of recent developments in neural population models and their networks.

### 7th INTERNATIONAL CONFERENCE PICOF’14,Inverse Problems, Control and Shape Optimization

Oct 13, 2013. On behalf of the Organizing Committee, you are cordially welcome to take part in the “7th INTERNATIONAL CONFERENCE PICOF’14,Inverse Problems, Control and Shape Optimization” which will be held on MAY 7-8-9, 2014 in Hammamet, TUNISIA.

PICOF’14 is a bi-annual international scientific conference which assembles senior researchers and scientists as well as a number of young researchers dealing with mathematical and numerical problems in the fields of inverse problems, control and shape optimization. It aims to gather the community of researchers in academia and industry working in these three fields. Particular attention will be devoted to the following topics:

1. Inverse Problems
2. Control and Shape Optimization

Invited Speakers

  Didier Auroux (Université de Nice Sophia-Antipolis, France)
Laurent Bourgeois (Ensta-Paris Tech, France)
Assia Benabdallah (Université Aix-Marseille, France)
Jean Michel Coron (Université de Paris VI, France)
Antoine Henrot (Université de Lorraine, France)
Barbara Kaltenbacher (University of Klagenfurt, Austria)
Armin Lechleiter (Bremen University, Germany)
Aline Lefevre (Ecole Polytechnique Palaiseau, France)
Edouard Oudet (Université Joseph Fourier, Grenoble, France)
Olivier Pantz (Ecole Polytechnique, Palaiseau, France)
Laleg Taous (Kaust University, Saudi Arabia)
Michael Vogelius (Rutgers University, United States)

To obtain details and updates on conference program, conference, venue, fees etc, save this URL http://www.lamsin.tn/picof14/index.html. We look forward to seeing you in Tunisia.

### Journal on Uncertainty Quantification

Oct 9, 2013. Researchers on inverse problems and data assimilation might not be aware of the SIAM activities on uncertainty quantification. Please note the following new journal:

The SIAM/ASA Journal on Uncertainty Quantification publishes research
articles presenting significant mathematical, statistical,
algorithmic, and application advances in uncertainty quantification,
defined as the interface of complex modeling of processes and data,
especially characterizations of the uncertainties inherent in the use
of such models. The journal also focuses on related fields such as
sensitivity analysis, model validation, model calibration,
data assimilation, and code verification.

The journal also solicits papers describing new ideas that could lead
to significant progress in methodology for uncertainty quantification
as well as review articles on particular aspects. The journal is
dedicated to nurturing synergistic interactions between the mathematical,
statistical, computational, and applications communities involved in
uncertainty quantification and related areas.

### ESA Workshop on Correlated Observation Errors

Oct 9, 2013. Please note the following upcoming workshop on “Correlated Observation Errors in Data Assimilation”. Aims: enable discussion and exchange of expertise between stakeholders on

1. Methods for finding and approximating observation error correlation matrices
2. Methods for efficiently implementing correlated observation errors in data assimilation systems

Outcome: better value from available observations

The workshop takes place 23 – 25 April 2014 University of Reading Contact: n.k.nichols@reading.ac.uk

### ICIPE 2014: Abstract Deadline Extended!

Oct 8, 2013. Due to technical issues with the abstract submission site on the original deadline, the FINAL deadline for abstract submission has been revised. The new, and final, deadline is October 20, 2013. We have a great number of abstracts in hand but look forward to receiving your contribution. 8th International Conference on Inverse Problems in Engineering (ICIPE2014).

Conference Website: http://www.icipe2014.org The conference will be held on May 12-15, 2014, Cracow, Poland. ICIPE2014 is the continuation of the conference series which began in Palm Coast, FL, USA, in 1993.

### International Symposium on Data Assimilation 2014

Oct 7, 2013. The preparation for the “International Symposium on Data Assimilation” Feb 24-28, 2014 at LMU Munich, Germany is progressing well. The official conference website is now open at: http://www.isda2014.physik.uni-muenchen.de/index.html

The symposium continues a series of well received events, including the German Symposium on Data Assimilation 2011 and the International Symposium on Data Assimilation 2012 at DWD in Offenbach. As in previous years, the symposium will include invited oral presentations by selected international experts, two extended poster sessions and extended periods for discussion.

Please submit your poster abstracts and register for the symposium before 15 December 2013!

### Recent Progress in Mathematical and Numerical Analysis of Inverse Problems

Oct 7, 2013. The analysis of inverse problems belongs to one of the fastest growing areas in applied mathematics. Inverse problems are encountered in several areas of applied sciences such as biomedical engineering and imaging, geosciences, remote sensing, financial modelling and non-destructive material evaluation.They arise in many practical situations when difficulties are experienced in measuring causal features of a given phenomenon. Solving the associated inverse problem is thus an attempt to construct from its actual observation, the equations which give rise to it.

There is a large number of mathematical and computational difficulties associated to the analysis of inverse problems. One of the great challenges of solving inverse problems lies in the fact that they might be ill-posed or non linear.

The aim of this conference is to stimulate discussions on mathematical and computational challenges of inverse problems, and namely on problems arising in the analysis of

inverse problems with internal measurements, which play an important role in detection problems encountered in tomography, imaging and photoacoustics. control methods in inverse problems allowing to retrieve singular sources in the wave equation. inverse conductivity problems which may now be treated with partial and local Dirichlet-to-Neumann maps; application of Carleman inequalities to the study of inverse problems. The steering committee planned to dedicate a significant part of the financial support assigned to this conference for inviting young researchers working in the field of the inverse problems in order to allow them to interact with numerous recognized actors in this domain.