Julius Koettgen banner
Julius Koettgen migration-energy-model

Curriculum Vitae

I started my career as a scientist at the turn of the millennium with presentations on fuel cells in three classes in the seventh and eighth grades, entered the biggest youth science and technology competition in Europe “Jugend forscht” in 2005, and received an award from the German Physical Society a year later. I received six awards and scholarships in total, including from the German Academic Exchange Service (DAAD), the German Physical Society (DPG), the German Chemical Society (GDCh) and the German Bunsen Society for Physical Chemistry (DBG). For more information see my work experience, education and my language and computer skills.

In Prof. Gerbrand Ceder’s work group, I closely cooperated with groups in the USA and Canada in the Joint Center for Energy Storage Research, one of the US Department of Energy's Energy Innovation Hubs. At RWTH Aachen University, I have been working closely in cooperation with several experimental and computational research groups in Germany, in Bratislava and at CERN and supported international guests from industry and science from the USA, the UK, South Korea, Japan, Denmark, Slovakia and Austria. In Prof. Manfred Martin’s work group, I successfully maintained laboratory equipment (XRD, impedance spectroscopy and van der Pauw measurements) and IT infrastructure and ensured that safety standards were met at all times. Additionally, I attended professional development seminars as well as Summer Schools in Oldenburg and Valencia. I am trained in project management and licensed as an SAP Certified Application Associate and Certified LabVIEW Associate Developer. On a personal level, I always do my best to support and assist my colleagues, for instance by writing a LabVIEW program or volunteering for several night shifts at the German Electron Synchrotron (DESY), and take pleasure in organizing social activities and team-building exercises for work groups, such as a scavenger hunt at the beach, surprising everybody with gifts and a Secret Santa – including singing Christmas songs – at the Christmas party or inviting the entire institute to a self-made brunch.

Work Experience

since Nov 2018

Postdoctoral Scholar

University of California, Berkeley, Department of Materials Science and Engineering,
Prof. Gerbrand Ceder, Berkeley, USA

Oct 2018 – Oct 2019

Postdoctoral Scholar

Lawrence Berkeley National Laboratory, Materials Sciences Division,
Prof. Gerbrand Ceder, Berkeley, USA

Mar 2017 – Sep 2018

Postdoctoral Researcher

RWTH Aachen University, Institute of Physical Chemistry,
Prof. Dr. Manfred Martin, Aachen, Germany

Feb 2012 – Feb 2017

PhD Student

RWTH Aachen University, Institute of Physical Chemistry,
Prof. Dr. Manfred Martin, Aachen, Germany

Jun 2011 – Nov 2011, Dec 2009 – Sep 2010

Research Assistant

RWTH Aachen University, Institute of Physical Chemistry,
Prof. Dr. Manfred Martin, Dr. Michael Schroeder, Aachen, Germany

Education

Feb 2012 – Feb 2017

RWTH Aachen University

PhD (Dr. rer. nat.) - Physical Chemistry (with distinction)
Aachen, Germany

Jul 2015 – Jul 2015

Justus-Liebig-Universität Gießen

Workshop on CeO2-based materials in catalysis and electrochemistry
Gießen, Germany

May 2015 – May 2015

Technical University Darmstadt

Computational Chemistry: Ab initio molecular dynamics (MD) using metadynamics for free-energy calculations
Darmstadt, Germany

Nov 2014 – Mar 2015

University of Duisburg-Essen

Integrated Business Processes with SAP ERP
Essen, Germany

Aug 2012

Carl von Ossietzky Universität Oldenburg

Summer School: Modern Computational Science
Oldenburg, Germany

Sep 2010

Universitat Politècnica de València

Summer School: Ceramic Membranes for Green Chemical Production and Clean Power Generation
Valencia, Spain

Oct 2009 – Feb 2012

RWTH Aachen University

Master of Science - Chemistry, MSc (with distinction)
Aachen, Germany

Oct 2006 – Jul 2009

RWTH Aachen University

Bachelor of Science - Chemistry, BSc
Aachen, Germany

Awards and Fellowships

September 2017

Borchers Badge (Borchers-Plakette), Rector of RWTH Aachen University

March 2015

20th International Conference on Solid State Ionics (SSI-20), Keystone, Colorado, USA, Student Travel Award

March 2015

German Chemical Society (GDCh), Scholarship

December 2014

German Academic Exchange Service (DAAD), Conference Grant

May 2011

German Bunsen Society for Physical Chemistry (DBG), Student Travel Grant

June 2006

Award of the German Physical Society, Deutsche Physikalische Gesellschaft (DPG)

Publications

2020

J. Koettgen, C.J. Bartel, G. Ceder, Computational investigation of chalcogenide spinel conductors for all-solid-state Mg batteries, Chem. Commun. 56 (2020) 1952-1955.
PDFSupplementDOI: 10.1039/C9CC09510A

2020

J. Koettgen, S. Grieshammer, G. Dück, G. Ulbrich, M. Lerch, M. Martin, Ab initio and experimental oxygen ion conductivities in Sm-Zr and Gd-Zr co-doped ceria, Solid State Ionics, 355 (2020) 115422.
PDFSupplementDOI: 10.1016/j.ssi.2020.115422

2020

P. Hein, B.O.H. Grope, J. Koettgen, S. Grieshammer, M. Martin, Kinetic Monte Carlo simulations of ionic conductivity in oxygen ion conductors, Materials Chemistry and Physics, 257 (2021) 123767.
PDFSupplementDOI: 10.1016/j.matchemphys.2020.123767

2020

J. Koettgen, M. Martin, Infinite dilution in doped ceria and high activation energies, Solid State Communications, 314-315 (2020) 113939.
PDFDOI: 10.1016/j.ssc.2020.113939

2020

J. Koettgen, G. Dück, M. Martin, The oxygen ion conductivity of Lu doped ceria, Journal of Physics: Condensed Matter 32 (2020) 265402.
PDFDOI: 10.1088/1361-648X/ab7d64

2020

J. Koettgen, M. Martin, The ionic conductivity of Sm-doped ceria, Journal of the American Ceramic Society, 103 (2020) 3776-3787.
PDFDOI: 10.1111/jace.17066

2019

J. Koettgen, M. Martin, The Effect of Jump Attempt Frequencies on the Ionic Conductivity of Doped Ceria, The Journal of Physical Chemistry C 123 (2019) 19437-19446.
PDF

2019

J. Koettgen, M. Martin, Coordination Numbers in Sm-Doped Ceria Using X-ray Absorption Spectroscopy, The Journal of Physical Chemistry C 123 (2019) 6333-6339.
PDFDOI: 10.1021/acs.jpcc.8b10494

2018

J. Koettgen, S. Grieshammer, P. Hein, B.O.H. Grope, M. Nakayama, and M. Martin, Understanding the ionic conductivity maximum in doped ceria: trapping and blocking, Physical Chemistry Chemical Physics 20 (2018) 14291-14321.
PDFSupplementDOI: 10.1039/C7CP08535D

2018

S. Grieshammer, S. Eisele, J. Koettgen, Modeling Oxygen Ion Migration in the CeO2-ZrO2-Y2O3 Solid Solution, The Journal of Physical Chemistry C 122 (2018) 18809-18817.
DOI: 10.1021/acs.jpcc.8b04361

2018

J. Koettgen, P.C. Schmidt, T. Bučko, and M. Martin, Ab initio calculation of the migration free energy of oxygen diffusion in pure and samarium-doped ceria, Physical Review B 97 (2018) 024305.
PDFSupplementDOI: 10.1103/PhysRevB.97.024305

2017

J. Koettgen, T. Zacherle, S. Grieshammer, and M. Martin, Ab initio calculation of the attempt frequency of oxygen diffusion in pure and samarium doped ceria, Physical Chemistry Chemical Physics 19 (2017) 9957-9973.
PDFDOI: 10.1039/C6CP04802A

2017

J.R. Köttgen, The relation between defect interactions, local structure and oxygen ion conductivity in the bulk of doped ceria, Dissertation, RWTH Aachen University, 2017.
PDFDOI: 10.18154/RWTH-2017-01919

2017

M. Martin, R.A. De Souza, J. Köttgen, F. Draber, and P. Hein, Defects and diffusion in solids: Application of new theoretical concepts, Bunsen-Magazin 19.3 (2017) 138-139.

2014

S. Grieshammer, B.O.H. Grope, J. Koettgen, and M. Martin, A combined DFT+U and Monte Carlo study on rare-earth doped ceria, Physical Chemistry Chemical Physics 16 (2014) 9974-9986.
PDFSupplementDOI: 10.1039/C3CP54811B

2014

T. Leichtweiss, R.A. Henning, J. Koettgen, R.M. Schmidt, B. Holländer, M. Martin, M. Wuttig, and J. Janek, Amorphous and highly nonstoichiometric titania (TiOx) thin films close to metal-like conductivity, Journal of Materials Chemistry A 2 (2014) 6631-6640.
PDFDOI: 10.1039/C3TA14816E

2012

M. Lumeij, J. Koettgen, M. Gilleßen, T. Itoh, and R. Dronskowski, Detailed insights into the structural properties and oxygen-pathways in orthorhombic Ba0.5Sr0.5Co0.8Fe0.2O3–δ by electronic-structure theory, Solid State Ionics Vol. 222-223 (2012) 53-58.
PDFDOI: 10.1016/j.ssi.2012.07.004

According to the publishers' licenses, be aware that the PDFs may not be further made available or distributed.

Talks

July 10, 2020

Computational Materials Design for Solid State Batteries and Fuel Cells, Institut of Physical und Theoretical Chemistry, Technical University of Braunschweig, Braunschweig, Germany

May 27, 2020

Mg batteries and solid-state electrolytes, Research group of Jürgen Janek, Institute of Physical Chemistry, Justus-Liebig-University Giessen, Giessen, Germany

May 5, 2020

Electromobility in 2020 – Obstacles and opportunities, German Aerospace Center, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Bonn, Germany

April 24, 2020

Solid-state electrolytes in batteries and fuel cells, Seminar of the Markus Winterer Group, Nanoparticle Process Technology, Faculty of Engineering, University of Duisburg-Essen, Duisburg, Germany

April 1, 2020

Battery cell technologies, VDI/VDE Innovation + Technik, Berlin, Germany

February 10, 2020

Electrochemical energy storage - Materials design for high ion mobility, BASF SE, Ludwigshafen am Rhein, Germany

October 09, 2019

Scientific Webinar, Joint Center for Energy Storage Research, Page, Arizona, USA

September 02, 2019

Volkswagen Meeting on Multivalent Solid State Battery Discovery and Design, Volkswagen Group Innovation, Volkswagen AG, Wolfsburg, Germany

July 03, 2019

Diffusion in multivalent solid-state electrolytes, Seminar of the Gerbrand Ceder Group, Lawrence Berkeley National Laboratory, Berkeley, California, USA

February 08, 2019

Diffusion in multivalent cathodes and conductors, Science of Materials Complexity Group Meeting, Joint Center for Energy Storage Research, Berkeley, California, USA

July 09, 2018

Tutorial Metadynamics and Molecular Dynamics, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

April 18, 2018

The ionic conductivity maximum in doped ceria, Seminar of the Gerbrand Ceder Group, Department of Materials Science and Engineering, University of California, Berkeley, California, USA

March 29, 2018

Defect formation, association and migration, Bilge Yildiz Group, Departments of Nuclear Science and Engineering and Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA

November 07, 2017

First-principles calculation of the migration free energy: Static and dynamic methods, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

June 06, 2017

Migration Entropy: Models and Concepts, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

November 08, 2016

Once in a Blue Moon, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

July 28, 2015

A first-principles approach to the attempt frequency for oxygen diffusion in pure and doped ceria, Workshop on CeO2-based materials in catalysis and electrochemistry, Justus Liebig University Giessen, Rauischholzhausen, Germany

June 16, 2015

A First-Principles Approach to the Attempt Frequency of Oxygen Ion Jumps in Doped Ceria, 20th International Conference on Solid State Ionics (SSI-20), Keystone, Colorado, USA

May 15, 2015

Ab initio calculation of the attempt frequency for oxygen diffusion in pure and samarium doped ceria, 114th General Assembly of the German Bunsen Society for Physical Chemistry (Bunsentagung 2015), Bochum, Germany

May 12, 2015

Ab initio calculation of the attempt frequency for oxygen diffusion in pure and samarium doped ceria, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

February 12, 2015

Local Structure and Oxygen Ion Conductivity in Doped Ceria, Colloquium of the Institute of Physical Chemistry, RWTH Aachen University, Aachen, Germany

January 29, 2015

Long-term Degradation Due to Cation Ordering in Rare Earth Doped Ceria, 39th International Conference and Expo on Advanced Ceramics and Composites, Daytona Beach, Florida, USA

January 28, 2015

A First-Principles Approach to the Attempt Frequency of Oxygen Ion Jumps in Doped Ceria, 39th International Conference and Expo on Advanced Ceramics and Composites, Daytona Beach, Florida, USA

July 16, 2014

How to calculate the reaction rate in doped ceria, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

April 02, 2014

A combined DFT+U and Monte Carlo study on rare earth doped ceria, PhD Course, Department of Materials Science and Engineering, Seoul National University, Seoul, South Korea

November 12, 2013

The Attempt Frequency in Ceria, Part 2, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

December 20, 2012

The Attempt Frequency in Ceria, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

June 26, 2012

The Local Structure in Doped Ceria, Seminar of the Chair of Physical Chemistry I, RWTH Aachen University, Aachen, Germany

Participation in National and International Conferences

June 25, 2020

Data analysis, modeling and data mining, ADDITIVE, Friedrichsdorf, Germany

May 08, 2020

TNG Big Techday, Artificial intelligence in chemistry & Creating a Data-Driven, Cloud-Native Ecosystem at the BMW Group, TNG Technology Consulting GmbH, Unterföhring, Germany

October 23, 2018 – October 24, 2018

Joint Center for Energy Storage Research Full Program Meeting, Argonne National Laboratory, Lemont, Illinois, USA

November 10, 2016 – November 11, 2016

Defects and diffusion in solids: Application of new theoretical concepts, Bunsen Colloquium, RWTH Aachen University (main organizer)

July 20, 2016 – July 21, 2016

5th Seoul National University-RWTH Workshop on Advances in the Science and Engineering of Functional Materials, RWTH Aachen University

July 27, 2015 – July 30, 2015

Workshop on CeO2-based materials in catalysis and electrochemistry, Justus Liebig University Giessen, Rauischholzhausen, Germany (including talk)

June 14, 2015 – June 19, 2015

20th International Conference on Solid State Ionics (SSI-20), Keystone, Colorado, USA (including talk)

May 14, 2015 – May 16, 2015

114th General Assembly of the German Bunsen Society for Physical Chemistry (Bunsentagung 2015), Bochum, Germany (including talk)

January 25, 2015 – January 30, 2015

39th International Conference and Expo on Advanced Ceramics and Composites, Daytona Beach, Florida, USA (including two talks)

October 30, 2014 – October 31, 2014

3rd Seoul National University-RWTH Workshop on Advances in the Science and Engineering of Functional Materials, RWTH Aachen University

July 02, 2012 – July 03, 2012

1st Seoul National University-RWTH Workshop on Challenges in Materials Science and Engineering, RWTH Aachen University

June 17, 2012 – June 20, 2012

Nature Conference Frontiers in Electronic Materials, Aachen, Germany (including poster)

February 07, 2012 – February 08, 2012

NIC Symposium 2012, Jülich Supercomputing Centre & Institute for Advanced Simulation, Forschungszentrum Jülich, Jülich, Germany

June 02, 2011 – June 04, 2011

110th Annual German Conference on Physical Chemistry (Bunsentagung 2011), Berlin, Germany

September 21, 2010 – September 23, 2010

ProcessNet-Annual Meeting 2010 and 28th DECHEMA-Annual Meeting of Biotechnologists, Aachen, Germany

Organizations

since 2014

VAA – Chemistry Managers
VAA – Führungskräfte Chemie

since 2014

German Chemical Society (GDCh)
Gesellschaft Deutscher Chemiker (GDCh)

since 2014

German Bunsen Society for Physical Chemistry (DBG)
Deutsche Bunsen-Gesellschaft für Physikalische Chemie (DBG)

2015 – 2016

The American Ceramic Society (ACerS)

Skills

In addition to being a native German speaker, I have repeatedly demonstrated my fluent and expressive English language skills across peer-reviewed articles and my 280‑page doctoral thesis. I scored in the TOEFL iBT test in the top 1% (117/120 points). I always strive to communicate complex topics clearly and engagingly, for example while supervising three graduate students from Japan and South Korea and in my oral presentations. My presentations include talks at international conferences, including ICACC in Daytona Beach, Florida and SSI‑20 in Keystone, Colorado and a lecture in the Department of Materials Science and Engineering at Seoul National University, South Korea.

I have a strong background in solid-state physics with an excellent practical knowledge of density functional theory. In my articles, I discuss thermodynamics, statistical mechanics and the kinetics of materials. I possess strong analytical and computer programming skills with an ability to analyze, interpret and see patterns in complex data, and extensive experience in data mining. I have experience in scientific programming including Fortran, C++, Python, Visual Basic for Applications (VBA), R, MATLAB and Linux shell scripts. I am a Certified LabVIEW Associate Developer (CLAD) licensed by National Instruments and SAP Certified Application Associate. Furthermore, I am familiar with the use of content management systems (e.g. TYPO3) and learning management systems (e.g. ILIAS) and in creating and maintaining websites using HTML and CSS. Additionally, I am conversant in in 3D modeling and animation applications (Cinema 4D, SketchUp and POV‑Ray), image editing and compositing (Adobe Photoshop, GIMP), vector graphics and illustration (Adobe Illustrator, Inkscape), video production and editing (Adobe Premiere Pro), interactive animations (Adobe Animate), Office and LaTeX. I also have provided application support for the IT infrastructure as First‑Level Support.

Personal Interests

My travels around the world have provided me with ample opportunities to gain new perspectives on life. I believe that seeing issues from multiple points of view is a key skill for productive and empathetic communication. I love experiencing new customs, cultures and ways of living, and immersed myself in my backpacking trip through India, three journeys across China, and a summer school in Valencia. I became familiar with international research during the evaluation of student exercises in Auckland, oral presentations at conferences in Florida and Colorado, and my talk at Seoul National University. I benefited from my wide-ranging and fruitful discussions on results with colleagues while visiting universities in Daegu, South Korea and New Zealand. During my seven visits to the United States, I gained an insight into the country’s rich history in Plymouth at the Mayflower II, in the Stockyards District of Fort Worth, and the Washington Monument. Experiencing the wonders of the natural world is also an essential part of my travels, for example at the Gibbon Falls in Yellowstone National Park and my camping road trip from San Francisco to Nevada, Utah, and Arizona. Finally, for me, outdoor activities are, both mentally and physically, an essential part of any vacation, including skiing from Switzerland to France, kayaking at Milford Sound, black water rafting in the Waitomo Caves in New Zealand and, my personal favorite, hiking, for example to the top of the Pinnacles, along the Tongariro Alpine Crossing, or in Korea.

Over my 13 years of piano lessons and 15 years in a choir, which I actually conducted for a short time, I have learned the importance of dedication, open communication and having a clearly defined task while, from my love of beach volleyball, I learned the importance of team spirit and working with others to achieve mutual goals. While managing projects, I draw inspiration from my years of experience as class president in high school, where I organized a charity event for children's aid organizations and the graduation ceremony. I am trained as church musician in ear training, composition, liturgics, theology, and especially playing the organ. Finally, I love to bring people and their skills together, recently, for example, through acting as a tri-lingual co-host at a wedding.

References

Prof. Dr. Gerbrand Ceder

Prof. Dr. Manfred Martin

Prof. Dr. Roger A. De Souza

Prof. Dr. Peter C. Schmidt

Teaching Activities

since November 2011

Supervision of ten undergraduate and graduate students including two students during their master's thesis

February 2012 – March 2018

Supervision and evaluation of examinations

July 2020

The Transition State Theory, Institut of Physical und Theoretical Chemistry, Technical University of Braunschweig, Braunschweig, Germany

November 2015 – December 2015

Seminar for Basic Physical Chemistry: Presentation and discussion of exercises on thermodynamics, e.g. adiabatic process, thermodynamic cycle, reaction enthalpy

October 2013 – March 2018

Physical Chemistry Lab II (bachelor, 3rd year): experiments: impedance spectroscopy & electrochemical relaxation, Assessment of students, supervision of experiments and evaluation of reports

October 2012 – September 2013

Advanced Lab for Chemistry (teacher training): experiment: velocity distribution, Assessment of students, supervision of experiments and evaluation of reports

October 2012 – September 2015

Basic Lab for Chemistry (teacher training): Conducting colloquia on the topics of evaporation enthalpy, potentiometry, photometric titration, neutralization enthalpy, conductivity, freezing-point depression, saponification of esters, atomic absorption and atomic emission spectroscopy

June 2012

Seminar Modern Methods, Physical Chemistry: Supervision of a seminar covering the topics X-ray radiation, X-ray diffraction, Bragg equation, atomic form factor, XRD setup, indexing, lattice constants, quantitative phase analysis, particle size determination, Rietveld structure refinement

May 2012

Workshop LabVIEW for beginners: Preparing and conducting a workshop for PhD candidates and Postdocs with the topics: VIs, Front Panel vs. Block Diagram, Dataflow, Debugging, Loop/Sequence/Case Structures, Arrays, Functions/SubVIs, Graphs, Local Variables

Applications and Research Reports

2012 – 2020

Applications for high-performance computing resources:

2013 – 2019

16 Progress reports and 6 annual reports for high-performance computing resources

Other Activities

November 2018 – September 2019

Supported group development in the management committee, projects initiated including the improvement of the standard operating procedures (SOPs)

2013 & 2018 – 2019

Head of team development

April 2016 – April 2017

Organization of a conference for 90 participants, Defects and diffusion in solids: Application of new theoretical concepts, Bunsen Colloquium, RWTH Aachen University: Conference and participant management and PR work (poster, website, social media, article in the Bunsen magazine, film)

August 2015 – October 2015

Member of the appointment committee for the W2 professorship computer-based solid-state theory

2014 – 2016

Support for the peer review of applications

2012 – 2017

Application support for the IT infrastructure, Management of software licenses

2011 – 2017

Supervision of laboratory equipment (XRD, impedance spectroscopy and van der Pauw measurements): Creating a user manual, preparation of health and safety documents, instructions for safety and operation, maintenance and calibration, writing LabVIEW programs

2012 – 2016

Supervision and recycling of precious metals

2012 – 2016

Support for international guests from across industry and science (e.g. from the USA, the UK, South Korea, Japan, Denmark, Slovakia, Austria)

April 2014

Visit abroad, Department of Materials Science and Engineering, Seoul National University, Seoul, South Korea

March 27, 2012 – April 02, 2012, September 20, 2012 – September 24, 2012, October 03, 2012 – October 08, 2012

Three research stays at the German Electron Synchrotron (DESY), Helmholtz Association, Hamburg, Germany

2012 – 2016

Synthesis and processing of samples for CERN, XRD and EDX measurements, literature research and digitization of literature data

July 2011

Visit to the On‑Line Isotope Mass Separator (ISOLDE), CERN, Geneva, Switzerland

since 2011

Development of partnerships, strategic planning, coordination and implementation of research projects

Subject-related Qualification

August 19, 2020

Exploring Battery Materials Electrodes, Electrolytes, and Interfaces Thereof, Materials Design

June 23, 2020

Diffusion and You: Batteries, Catalysis, Alloys, Corrosion, and the Stock Market, Materials Design

March 31, 2020 – June 22, 2020

Analyzing Data with Python, IBM:
Importing Data Sets, Data Wrangling (Pre-processing Data, Dealing with Missing Values, Data Formatting, Data Normalization, Turning Categorical Variables into Quantitative Variables in Python), Exploratory Data Analysis (Descriptive Statistics, GroupBy, Correlation - Statistics, Analysis of Variance ANOVA), Model Development (Linear Regression and Multiple Linear Regression, Model Evaluation using Visualization, Polynomial Regression and Pipelines, Measures for In-Sample Evaluation, Prediction and Decision Making), Model Evaluation and Refinement (Overfitting, Underfitting and Model Selection, Ridge Regression, Grid Search)

May 13, 2020

Battery development and production, Custom Cells Itzehoe GmbH, Itzehoe, Germany

May 04, 2020

Lithium-ion cells, Zentrum für Sonnenenergie- und Wasserstoff-Forschung Baden-Württemberg (ZSW), Ulm, Germany

February 27, 2020

How to determine parameters for digital battery models, Comsol Multiphysics GmbH

February 27, 2020

Teaching Heat Transfer and Phase Change Modeling Using COMSOL, Comsol Multiphysics GmbH

June 23, 2018

TOEFL iBT Test, Educational Testing Service (ETS), 117/120 points (top 1%)

September 21, 2016

Certified LabVIEW Associate Developer (CLAD), National Instruments, Ruhr University Bochum, Bochum, Germany

May 18, 2015 – May 22, 2015

Computational Chemistry: Ab initio molecular dynamics (MD) using metadynamics for free-energy calculations, Technical University Darmstadt, Darmstadt, Germany

December 04, 2014

Materials and Compounds: Surface Analysis, Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC), RWTH Aachen University

January 30, 2013

Ab-initio investigation of ground states and ionic motion in particular in zirconia-based solid-oxide electrolytes, PGI-1, Forschungszentrum Jülich, Jülich, Germany

August 20, 2012 – August 31, 2012

Summer School: Modern Computational Science, University of Oldenburg, Oldenburg, Germany

April 23, 2012 – April 24, 2012

Workshop on Electron Crystallography, Central Facility for Electron Microscopy and Institute of Crystallography, RWTH Aachen University

April 12, 2012 – July 05, 2012

Meeting Point MATLAB, Center for Doctoral Studies, RWTH Aachen University

March 07, 2012

COMSOL Multiphysics Workshop, COMSOL Multiphysics GmbH, Düsseldorf, Germany

September 26, 2011 – September 30, 2011

The Rietveld Method: Powder Data from X-ray and Neutron Diffraction, XN-Ray Central Office and Forum Materials Science and Engineering, RWTH Aachen University

September 08, 2010 – September 10, 2010

Summer School: Ceramic Membranes for Green Chemical Production and Clean Power Generation, Universitat Politècnica de València, Valencia, Spain

2010 – 2017

Colloquium of the German Chemical Society (GDCh), colloquium of the Institute of Physical Chemistry and seminar of the Chair of Physical Chemistry I, RWTH Aachen University

Professional Skills Seminars

March 06, 2015

The successful project application, Center for Doctoral Studies, RWTH Aachen University

February 19, 2015 – February 20, 2015

Leaders don't fall out of the sky. A review of your leadership competence, Center for Doctoral Studies, RWTH Aachen University

November 12, 2014 – April 24, 2015

Integrated Business Processes with SAP ERP, SAP Certified Application Associate - Business Foundation & Integration with SAP ERP 6.0 EHP5, University of Duisburg-Essen & SAP SE, Essen, Germany

October 14, 2014

Small talk and Networking, Career Center, RWTH Aachen University

September 17, 2014 – September 18, 2014, March 04, 2015 – March 05, 2015

Project Management for Executives, Module 1: Methods and Instruments of Project Management, Module 2: Processes of Project Management, Center for Doctoral Studies, RWTH Aachen University

July 19, 2014

Higher Education Jobs, Language Center, RWTH Aachen University

June 05, 2014

Careers in Science. Funding opportunities and career paths for postdocs, Center for Doctoral Studies, RWTH Aachen University

September 09, 2013

Cybercrime: How safe is my research data?, Center for Doctoral Studies, RWTH Aachen University

November 19, 2012

Smartopia, Ministry of Knowledge Economy in Korea, RWTH Aachen University

October 24, 2012

E-learning and Copyright, University and City Library of Cologne, Aachen

Julius Koettgen samples

legal notice / Impressum