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Katalog der UB Siegen

Forscher-Alumni-Galerie

Prof. George Chagelishvilli

Georgian National Academy of Sciences, Georgia

Host at the University of Siegen: Prof. Holger Foysi
Chair of Fluid Mechanics

Current professional background:

Academic of the Georgian National Academy of Sciences, Principal Research Scientist at the Institute of Geophysics, Tbilisi State University, and a Principal Research Scientist at the Abastumani Astrophysical Observatory, Ilia State University.

Field of research:
  • Natural and engineering plasma and fluid dynamics;
  • Linear phenomena induced by shear flow non-normality;
  • Self-organization (including formation of spatiotemporal patterns) and turbulence in hydrodynamic and magnetohydrodynamic shear flow systems;
  • Aeroacoustics of turbulent shear flows.
Purpose of your last research visit:

The purpose of my research visits is the investigation of aerodynamic sound generation (aeroacoustics) which is a major subject of fluid dynamics, with applications in wide areas of engineering problems, such as aircraft jet engines, naval and automotive applications. The emission of noise from mixing processes and turbulence of engineering flows is to be reduced owing to modern regulations, which require a substantial reduction of the perceived sound levels. Working on this problem, we based our study on the rethinking of non-uniform/shear flow dynamics by the hydrodynamic stability community in 1990s. This approach, formed as a result of this rethinking, led to a breakthrough in the understanding and description of turbulence in different natural and engineering shear flows. Specifically, we adapted this trend of research to the aerodynamic sound generation in time-developing shear layers.

Relation to the University of Siegen and/or to the local host:

I have joint research and publications with Prof. Holger Foysi and Dr. George Khujadze where a new scheme of turbulence control is elaborated on the example of plane Couette flow. Our scientific interests also coincide in the field of aeroacoustics of shear flow systems. In my opinion the collaboration is quite productive and our perspective is to get closer to engineering flows.

Future projects / Activities:

Our future plans naturally follow from our efforts in the past and present. At first, we are planning to work on the control of the aerodynamic sound generation in time-developing shear layers. We also wish to apply the elaborated scheme of turbulence control to flows of practical interests, for instance, - to boundary layer flows

Impressions of Siegen:

Siegen is a pleasant city, very convenient for people who are visiting with a goal similar to mine: to live quietly and concentrate on science. However, it would be better if there were more guest house apartments at the University.

Dr. Ozgül Öztürk

Host at the University of Siegen: Prof. Dr. Ullrich Pietsch
Chair of the Department of Solid State Physics

Current professional background:

Research scientist at the University of Siegen physics department.

Field of research:

I currently work in the field of solid state physics, specifically my project is about nanowires.

Purpose of your last research visit:

I actually did my post-doctoral degree here in Siegen. That was when I began work on my nanowires project. Nanomaterials could be inserted onto the graphene, and then by combining this with polymers we are able to produce new kinds of optoelectronic sensors.

Relation to the University of Siegen and/or to the local host:

After finishing my PHD in Istanbul I came to Siegen originally for my post doctoral degree and worked with Prof. Dr. Ullrich Pietsch. After working in Istanbul for 8 years as an assistant professor, I have been offered a permanent position here in Siegen.

Future projects / Activities:

The University of Siegen is great for my research, so therefore I want to continue working on these projects here. We are currently performing experiments to optimise the graphene and nanowire samples further. As Richard Feynman, one of the first scientists to study nanomaterials, said, “there is plenty of room at the bottom.” So the possibilities with nanoscience are endless, with possible uses in the fields of biophysics, material science and pharmaceuticals.
I am also involved with a joint project in Jordan which uses a synchrotron, one of the most wonderful things about this project is that it highlights the power of science to bring people from different nations together. Even if their governments are currently not getting along with one another.

Impressions of Siegen:

Compared to Istanbul, Siegen is like a different planet! But I find it to be a nice change from living in a different city. I found everyone here, including Professor Pietsch to be very warm and welcoming to me. Siegen also feels like a nice place to raise my child.

Dr. Daria Berdnikova

Host at the University of Siegen: Prof. Dr. Heiko Ihmels
Department of Chemistry–Biology,
Chair of Organic Chemistry II

Current professional background:

I am a Marie Sklodowska-Curie fellow currently working on an independent European project here at the university.

Field of research:

Light-controlled interactions of organic molecules with nucleic acids.

Purpose of your last research visit:

On my last research visit, I performed investigations of organic molecules, which can be applied for light-controlled interactions with DNA. I design a molecule, synthesize it, check its photochemical properties, and then see if it can targetedly attack the nucleic acid upon irradiation. This approach can be used for killing undesirable cells, such as cancer cells. My current project is dealing with RNA instead of DNA, because this is more perspective for medical and biological purposes.

Relation to the University of Siegen and/or to the local host:

My former supervisor in Russia already had an established collaboration with Prof Ihmels here in Siegen, and they both encouraged me to apply for a short-term DAAD scholarship. After successfully receiving this scholarship in 2011, I came to Siegen to work with Prof Ihmels for the first time. Later on, I returned to Siegen several times to perform small joint projects. In 2017, I finally moved here for my current 2-years long project with Prof Ihmels.

Future projects / Activities:

We are currently 3 months into a 2-year research project. After we have some promising results, we can arrange some collaboration with biologists and biochemists to test our newly developed methods on fighting with cancer and bacterial cells and viruses.

Impressions of Siegen:

I’m originally from Moscow, which is very large, noisy and overcrowded city. Being in such a large city also made me feel separated from nature. So I adore Siegen because it has everything I need and I feel much closer to nature.

Dr. Gouri Shankar Giri

Host at the University of Siegen: Prof. Dr. Christof Wunderlich
Department of Physics,
Chair of Experimental Quantum Optics

Current professional background:

Postdoctoral Research Fellow at the Physics Department, University of Siegen

Field of research:

Quantum computing with trapped ions

Purpose of your last research visit:

I was a recipient of the Marie Curie Fellowship in order to work with Prof. Christof Wunderlich. Together we are developing essential elements for an ion trap based large-scale quantum computer.


Relation to the University of Siegen and/or to the local host:

I originally met Prof. Christof Wunderlich at the University of Sussex in the U.K, whilst we were working on a large-scale EU project. Conventionally, logic gate operations in ion trap quantum computers are realized with optical radiation (such as lasers). Prof. Wunderlich proposed and demonstrated a new scheme that ensures realization of logic gates using long wavelength radiation (such as microwaves). I was interested in working with him and I asked to join his research team in Germany. After successfully applying for the Marie Curie Fellowship in 2014, I took up my position as a Postdoctoral Research Fellow here in Siegen.

Future projects / Activities:

I will continue to work toward the development of ion trap quantum computer in collaboration with the research department here. I expect quantum computing to hugely advance in the coming decades, with the potential to change how we use computers in many different fields.

Impressions of Siegen:

It is certainly a good place to study, the living costs are low, and the campus, especially the physics campus is beautiful.

Dr. phil. Hyeongjoo Kim

Chung-Ang University Department of Philosophy, Republic of Korea

Host at the University of Siegen: Prof. Dr. Dieter Schönecker
Department of Philosophy,
Chair of Practical Philosophy

Current professional background / Field of research:

Philosophy of I. Kant. Metaphysic, Didactics of Philosophy

Purpose of your last research visit / Relation to the University of Siegen and/or to the local host:

Cooperation of project "Sachunterricht vernetzen", Writing the paper "was heißt empirischer Satz"/ past supervisor

Future projects / Activities:

"Time Lecturer Support Project" of NRF(National Research Foundation of Korea): A Dialectic of Thought and Being: Kant-Fichte Comparison on their respective Attitudes toward descartes' Cogito-Thesis

Prof. Dr. Bo Song

Professor at Soochow University, China

Host at the University of Siegen: Prof. Dr. Holger Schönherr
Department of Chemistry,
Chair of Physical Chemistry

Current professional background:

Professor at Soochow University

Field of research:
  • Supramolecular assembly
  • Colloidal and interfaces
  • Fluorescence probes for bio-imaging
Purpose of your last research visit / Relation to the University of Siegen and/or to the local host:

The main target of my visit is to establish the collaboration with Prof. Holger Schoenherr in form of research study, exchange student, and bilateral joint fund. Actually, these items are connected, and will become each other’s support.

Future projects / Activities:

(1) Currently, we nailed down the specific research collaboration starting with fluorescence measurement and interpretation. Besides Prof. Holger Schoenherr and I, Sergy, an expert on fluorescence, will be involved. Intensified discussion can be conducted via email or network meeting (for example Skype). (2) Around the end of 2017, we will try to encourage student join the collaboration. From my side, I try to find financial sources to support master student to register as a PhD student in Siegen University. The student will be co-guided by Holger and me. By doing this, for one thing we can have more close collaboration, and for the other thing we can expand to larger scale collaboration (involve more project, student, and even professors). (3) The above-mentioned two aspects will make the bases for bilateral joint fund application. We hope that the health feedback of our lab-level collaboration can be expanded to depart-level, and even more.

Dr. Alexey Yushkov

Czech Academy of Sciences the Institute of Physics, Prague

Host at the University of Siegen: Prof. Dr. Markus Risse
Department of Physics,
Experimental Particle Physics

Current professional background:

Senior researcher at the Institute of Physics, Czech Academy of Sciences, Prague Coordinator of the physics task "Composition" of the Pierre Auger Collaboration

Field of research:

Experimental physics of ultra-high-energy cosmic rays

Purpose of your last research visit:

Discussion of details of the common work on analysis of the mass composition of ultra-high energy cosmic rays and of the photon searches using data of the Pierre Auger Observatory. Coordination of various activities within the Auger collaboration for publications and discussion with the students of the Siegen group of their master and PhD projects.

Relation to the University of Siegen and/or to the local host:

Postdoctoral position in the group of Prof. Markus Risse, 07/2013-03/2016

Future projects / Activities:

Research topics described above will continue also after the two planned research visits and surely reach into the next 1-2 years. There are more analysis topics, not yet mentioned, that may later come in addition; also in terms of hardware expertise (electronics of Auger detectors) and of the ongoing upgrade of the Auger Observatory, communications may prove useful.

To this end, the present visits would also be used to check options for further third-party funding of research visits (like DAAD). This includes mutual visits of various group members (Siegen-Prague), with the aim to strengthen the links between the two working groups.

Unsere Forscher-Alumni-Galerie befindet sich im Aufbau. Die Vorstellung weiterer Forscher-Alumni-Porträts folgt in Kürze.

Currently we are working on the Research Alumni Gallery. More profiles will be published soon.