Kolloquium SS 2018

Fakultätskolloquium der Technischen Fakultät im SS 2018

  • Die Kolloquien an den Instituten für Elektrotechnik und Informationstechnik sowie Materialwissenschaften:

Jeweils montags eine halbe Stunde vor Beginn der Vorträge, also um 16.45 Uhr, werden die Gastredner den Besuchern des Kolloquiums in einer zwanglosen Runde bei einer Tasse Kaffee in der "Eisdiele" (Eingangshalle Geb. D, neben dem "Aquarium") vorgestellt.

Ansprechpartner:  Daniel Johannsen (Tel. 0431-880-6068) dekanat@tf.uni-kiel.de

  • Die Kolloquien am Institut für Informatik:

Alle Vorträge finden - soweit nicht anders angegeben - im Raum Ü2/K des Instituts für Informatik (Ludewig-Meyn-Str. 2, Vorbau des Mathematischen Seminars) freitags um 14 Uhr c.t. statt. 45 Minuten vor Vortragsbeginn stehen Tee und Kaffee bereit.

Ansprechpartner/innen: Geschäftszimmer des Instituts für Informatik (Tel. 0431 880-7270)aktuell@informatik.uni-kiel.de

  • Wenn Sie die Einladungen per E-Mail erhalten möchten tragen Sie sich bitte in die Mailingliste ein.

Bitte achten Sie bei Sonderkolloquien auf die Zeit- und Raumangaben!

 

Nachfolgend alle Vortragstermine in chronologischer Abfolge

Kolloquiumsvortrag (ETI/IT), Prof. Claus Hilgetag, UK Eppendorf, / am 09.04.2018

09.04.2018 von 17:15 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel:  A simple excitable model reveals how brain network topology shapes neural activity patterns

Abstract: Brain networks are characterized by a number of distinctive topological features, such as a
heterogenous degree distribution with hubs, hierarchically organized modules, as well as a
characteristic spectrum of motifs and cycles. These features have consequences for various aspects
of brain dynamics, such as self‐sustained network activity, the wave‐like propagation of activations as
well as correlations and anti‐correlations of activity patterns. In a series of recent studies we have
demonstrated that the relation between neural network topology and dynamics can be
systematically investigated with the help of a simple, but powerful excitable (cellular automaton)
model which facilitates a mechanistic understanding of the contributions of different topological
features of brain networks to brain dynamics.

Prof. Kohlstedt

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Sonderkolloquiumsvortrag (ET&IT) Prof. Frank Vollmer, University of Exeter / am 12.04.2018

12.04.2018 von 14:00 bis 14:45

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: Sensing the Nanoscale with Optoplasmonics

Abstract: Nanophotonic device building blocks, such as optical nano/microcavities and plasmonic nanostructures, lie at the forefront of sensing and spectrometry of trace biological and chemical substances. My laboratory is developing a new class of nanophotonic architectures by combining optically resonant dielectric nano/microcavities with plasmonically resonant metal nanostructures to enable detection at the nanoscale with extraordinary sensitivity. Initial demonstrations include single-molecule detection and even single-ion sensing. The coupled photonic-plasmonic resonator system promises a leap forward in the nanoscale analysis of physical, chemical, and biological entities. I will review our work in this burgeoning field of optoplasmonic biosensors. I will also talk about our most recent advances in localising light at the nanoscale in disordered 2D photonic crystals.

1Department of Physics and Astronomy, Living Systems Institute, University of Exeter, EX44QD, Exeter, UK

E-mail: f.vollmer@exeter.ac.uk

CV: Frank Vollmer is a Professor of Biophysics at the Living Systems Institute at the University of Exeter. Prof Vollmer pioneers optical technology to study processes at the nanoscale. He held several appointments at leading US institutions including Instructor in Medicine at Harvard Medical School. Before moving to the LSI in 2016, he held the position of Research Group Leader at the Max Planck Institute for the Science of Light (DE). In 2017 Prof Vollmer was awarded the Royal Society Wolfson Research Merit Award.

References

 

 

 

Prof. Gerken

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Kolloquiumsvortrag (INF), Prof. Dr. Vijay Ganesh, University of Waterloo, Canada, am 13.04.2018

13.04.2018 von 14:15 bis 15:45

Institut für Informatik, Ludewig-Meyn-Straße 2, 24118 Kiel, Raum: Übungsraum 2/K

Thema: Modern SAT Solving in Practice

Abstract:

 

 

Dr. Vijay Ganesh is an assistant professor at the University of Waterloo since 2012. Prior to that he was a research scientist at MIT, and completed his PhD in computer science from Stanford University in 2007. Vijay's primary area of research is the theory and practice of automated reasoning aimed at software engineering, formal methods, security, and mathematics. In this context he has led the development of many SAT/SMT solvers, most notably, STP, The Z3 string solver, MapleSAT, andMathCheck. He has also proved several decidability and complexity results relating to the SATisfiability problem for various mathematical theories. For his research, he has won over 20 awards including an ACM Test of Time Award at CCS 2016, two Google Faculty Research Awards in 2011 and 2013, and a Ten-Year Most Influential Paper Award at DATE 2008.

Prof. Dr. Dirk Nowotka

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Kolloquiumsvortrag, (ET/IT), Dr. Jan Abshagen, Wehrtechnische Dienststelle für Schiffe und Marinewaffen, Maritime Technologie und Forschung - WTD 71. / am 16.04.2018

16.04.2018 von 17:15 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: Flow-induced Noise in Hydroacoustic Sensor Systems

Abstract: Sound can propagate over a large distance in the sea without significant attenuation and is therefore of unique importance in underwater communication, navigation, and detection. Underwater sound is received in these applications with hydroacoustic sensor systems that are often attached to or towed behind a vessel. The turbulent flow that forms around the hull of the moving sensor system induces hydroacoustic noise in the interior that dominates the noise level (and therefore limits the performance) at larger speeds due to the strong speed dependence of flow acoustic sources (e.g. Lighthill’s v8-law). In a series of research cruises in recent years the statistical properties and underlying physical mechanisms of interior hydroacoustic noise induced from outer turbulent flows have been investigated under sea conditions with towed measurement systems. The talk will focus on the spatio-temporal correlation of the turbulent noise sources as well as the filter properties of the mechanical hull structure and the embedded hydrophones. The analysis is predominantly performed in wavenumber-frequency space. New developments in piezoelectric thin-film sensor technology allow in principle the design of specific wavenumber filters for flow noise reduction. The potential of such sensors for future underwater applications is discussed.

Prof. Schdmidt

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Kolloquiumsvortrag, Dr. Sander-Thömmes, Physikalisch-Technische Bundesanstalt (PTB) in Berlin / am 23.04.2018

23.04.2018 von 17:15 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: Biomagnetic Sensing and Processing – Progress Using a Modular Approach

Abstract: In the field of biomagnetism the application of mathematical algorithms has been as important as the hardware itself. Traditionally, the hardware (the sensor Array) was based on superconducting quantum interference devices (SQUIDs) and operated for decades without large modifications. In contrast to that the range of relevant mathematical algorithms increased at a steady pace. This was driven by factors such as an ever increasing PC based computing power, new physiological insights motivating the application of existing algorithms, and the development of new algorithms to test biophysical models among others.

After around three decades of SQUID based Hardware, now new magnetic field sensors with the potential to replace or complement SQUIDs are available or under development. The opportunity for new sensors is the consequence of clinical challenges unsolved by state-of-the art SQUID based systems and due to new technology allowing alternative quantum physics based sensors in a small sized housing. These new sensors often have extra capabilities compared with SQUIDs and naturally some disadvantages. I will illustrate the modular approach using the example of optically pumped magnetometers and the signal processing toolbox FieldTrip.

Short biography

Tilmann Sander-Thömmes studied Physics at University of Freiburg and ETH Zürich and graduated there in 1992. He continued to obtain a PhD in solid-state physics at Imperial College in London. Following two post-docs in Berlin he has been working at Physikalisch-Technische Bundesanstalt since 2000 in the laboratory for Biosignals. Since 1998 he is involved with measuring and analysing magnetic brain signals. He is an expert in magnetoencephalography using both SQUIDs and more recently optically pumped magnetometers.

gus@tf.uni-kiel.de

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Sonderkolloquium (ET/IT), Antrittsvorleseung, Prof. Dr. Andreas Bahr, Technische Fakultät der CAU am 26.04.2018

26.04.2018 von 17:00 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: Brain Signal Acquisition with Miniaturized Electronic Systems for the Investigation of Local Neural Networks

Abstract:  In this talk, I will exemplify how advancements in the design of integrated sensor electronics enable new kinds of biomedical signal analysis:

In neuroscience research the development of the brain and the treatment of diseases like certain forms of epilepsy are analyzed with genetic mouse disease models. For the special case of the recording from neonatal mice (2-3 cm, 3-5 g) an implantable system has been developed, that enables chronic recordings. To achieve this, an application specific integrated circuit (ASIC) has been developed in an advanced 130 nm CMOS technology. Moreover, an implant and a recording system for live view of neural data have been presented. The functionality of the integrated circuit and the suitability of the implant system have been confirmed with in-vivo experiments with adult and 12 days old mice.

Andreas Bahr, Institute of Electrical Engineering and Information Technology, University of Kiel, Kiel, Germany, andreas.bahr@tf.uni-kiel.de

Prof. Bahr

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Kolloquiumsvortrag (MAWI), Prof. Xian (Sherry) Chen, Hong Kong University of Science and Technology, / am 14.05.2018

14.05.2018 von 17:15 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel:  Enhanced fatigue properties of phase-transforming materials by satisfying the cofactor conditions
 

Abstract:

Materials undergoing reversible solid-solid phase transformations provide emerging applications such as biomedical implants and stents, microelectronic actuators and sensors. The essential functionality of these materials is the ability to recover large deformation (i.e. 5~8%) before and after the structural transformation driven by temperature/stress/electromagnetic fields. The change of the lattice parameters and the breaking of symmetries, in turn, will cause the formation of microstructures, which lead to the accumulation of intrinsic defects at the stressed transition layer between phases.  It has been theorized that the macroscopic behaviors strongly depend on the kinematic properties of the transition layer between phases. If the lattice parameters satisfy some special mathematical conditions (the cofactor conditions), we observe that the functional fatigue properties of the phase-transforming materials have been tremendously improved. In this talk, we will briefly review the mathematical framework of the cofactor conditions and introduce an algorithmic way to evaluate these conditions directly from the X-ray measurements. We will also show some experimental results how the functional fatigue properties are enhanced at various length scales. 

 

Brief Biography of Prof. Xian(Sherry) Chen (HKUST)

Education:

Ph.D. and M.S., Aerospace Engineering and Mechanics, University of Minnesota, US

B.S., Materials Science and Engineering, Huazhong University of Science and Technology, China

 

Academic positions:

2015 – present, Assistant Professor, Mechanical and Aerospace Engineering, Hong Kong Univ. of Science and Technology, HK

2015 – 2016, Visiting Professor, Mechanical and Civil Engineering, California Institute of Technology, US

2014 – 2015, Postdoctoral Fellowship, Lawrence Berkeley National Lab, US

 

Research interests:

The research of our group integrates the theories of mechanics of crystalline solids with advanced structural characterization methods and algorithms to develop new phase-transforming materials. These materials have emerging applications in medical devices, microelectronics and energy conversion devices.

 

GRF grant (2016 – 2019): Investigation of microstructure-reversibility relationship for phase-transforming materials (Early Career Award)

GRF grant (2017 - 2020): Algorithmic approaches for high-throughput screen and discovery of new shape memory alloys

UGC grant (2017-2019): Measure 3D strain of phase transforming materials by Differential Interference Contrast optical system

Prof. Quandt

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Kolloquiumsvortrag (INF), Dr. Hermann Lindhorst, Fachanwalt für IT-Recht / am 25.05.2018

25.05.2018 von 14:15 bis 15:45

Christian-Albrechts-Platz 2, 24118 Kiel, Raum: Hörsaal A

Titel:  „Datenschutz: Anbruch eines neuen Zeitalters? – Zur Geltung der EU-Datenschutzgrundverordnung ab dem 25. Mai"

Abstract: Ab dem 25.5.2018 haben alle Bürger, Behörden und Unternehmen neue Vorschriften zum Datenschutz zu beachten, denn dann gelten europaweit die Regelungen der „EU-Datenschutzgrundverordnung“ sowie in Deutschland ein Bundesdatenschutzgesetz, bei dem nicht ein einziger Paragraph so wie vorher geblieben ist. Darauf weisen seit Monaten nicht nur Datenschützer, sondern auch viele andere hin, wie z.B. Unternehmensberater, Rechtsanwälte und Zertifizierungsunternehmen wie der TÜV. Doch was wird sich ab Ende Mail tatsächlich ändern? Hat vor dem Hintergrund z.B. der drastisch erhöhten Sanktionen ein echtes Umdenken stattgefunden oder bleibt der Datenschutz eine ungeliebte bürokratische Bürde?

 

wha@informatik.uni-kiel.de

Prof. Hasselbring

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Kolloquiumsvortrag (MaWi), Prof. Richard Fu, Faculty of Engineering and Environment, Northumbria University, Newcastle / am 28.05.2018

28.05.2018 von 17:15 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: Acoustic wave lab-on-chip is now flexible, bendable and potentially wearable!

Abstract: Thin film acoustic wave devices especially surface acoustic waves (SAW) have been used for sample preparation (sorting, separating, mixing, nebulization and dispensing) as well as bio-sensing. This talk will focus on our recent work of flexible and wearable thin film acoustic wave lab-on-chip (mainly using ZnO and AlN films on flexible substrates) for acoustic wave based microfluidic applications. We report theoretical and experimental studies of the evolution, hybridization and decoupling of wave modes in the flexible acoustic wave devices, as well as their vibration patterns. thus providing a guide for different microfluidic applications. Thin film based flexible SAW devices have the potential to be integrated with other microfluidic and sensing technology on flexible substrates including CMOS integrated circuits to make novel lab-on-chip for bio-detection for wearable and flexible applications. SAW devices on commercial polymer and aluminum foils have been fabricated and various microfluidic functions, such as mixing, pumping, jetting have been demonstrated with bent and deformed acoustic wave devices.

About Prof. Richard Fu. He has extensive experience in smart thin film/materials, biomedical microdevices, lab-on-chip, micromechanics, MEMS, nanotechnology, sensors and microfluidics. He has established a good reputation from his pioneer research work on shape memory films, piezoelectric thin films, nanostructured composite/films for applications in MEMS, sensing and energy applications. He published over 330 science citation index (SCI) journal papers (including Progress in Materials Science and Nature Communications), 2 books, 20 book chapters, and over 120 conference papers. His current SCI H-index is 39 with over 6500 citations. He is associate editor/editorial board members for seven international journals including Scientific Report. He is regular journal paper reviewers for more than 30 journals, and has co-organized 12 international conferences worldwide, and co-edited six special issues for journals.

Prof. Quandt

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Kolloquiumsvortrag (INF), Dr. Matthias Mnich, Uni Bonn / am 01.06.2018

01.06.2018 von 14:15 bis 15:45

Institut für Informatik, Ludewig-Meyn-Straße 2, 24118 Kiel, Raum: Übungsraum 2/K

Titel: Multivariate Algorithms for Machine Scheduling Problems

Abstract: Machine scheduling problems are a long-time key domain of algorithms and complexity research.  In those problems, we are generally given a finite set J of jobs with certain characteristics, and we must find a schedule for processing the jobs on one or more machines, which also may have their individual specifications. Typical characteristics of a job are its processing time, its release date, its due date, or its importance reflected by an integer weight. A significant amount of research has been devoted in the past 60 years towards designing polynomial-time algorithms which approximate the value of optimal schedules (for various objective functions). A novel approach to machine scheduling problems are multivariate algorithms, which aim to find a provably optimal schedule at the expense of an increased run time, which is permitted to depend moderately exponentially on the job characteristics or other structural parameters. We survey some recent algorithms in this paradigm, present some novel results, and discuss several challenging open problems in this exciting research area.

Prof. Jansen

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Kolloquiumsvortrag (MAWI), Prof. Dr. Ulrich Schwarz,Heidelberg University, Institute for Theoretical Physics am 04.06.2018

04.06.2018 von 16:00 bis 16:45

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: Cells and tissue as active materials

Abstract:

Biological systems such as cells and tissue use non-equilibrium processes to actively generate mechanical stress, movement and growth. Some of these processes can actually be reconstituted in biomimetic experiments with active soft matter. In this talk, we first discuss why and how contractile forces are generated by biological systems and how they can be measured, for example on soft elastic substrates. We then discuss how these contractile systems can be mathematically described by classical continuum mechanics extended by active elements. We finally explain how the local contractility of cells and tissue can be controled with optogenetics, and how the resulting forces and flows can be used to estimate their material properties.

Prof. Selhuber

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Kolloquiumsvortrag (MAWI), Nian. X Sun W.M. Keck Laboratory for Integrated Ferroics, & ECE Department, Northeastern University, Boston, / am 18.06.2018

18.06.2018 von 17:15 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: RF NEMS Magnetoelectric Sensors

Abstract: The coexistence of electric polarization and magnetization in multiferroic materials provides great opportunities for realizing magnetoelectric coupling, including electric field control of magnetism, or vice versa, through a strain mediated magnetoelectric coupling in layered magnetic/ferroelectric multiferroic heterostructures [1-9]. Strong magnetoelectric coupling has been the enabling factor for different multiferroic devices, which however has been elusive, particularly at RF/microwave frequencies. In this presentation, I will cover the most recent progress on new integrated magnetoelectric materials, magnetoelectric NEMS (nanoelectromechanical system) based sensors and antennas. Specifically, we will introduce magnetoelectric multiferroic materials, and their applications in different devices, including: (1) novel ultra-compact RF NEMS acoustic magnetoelectric antennas immune from ground plane effect with < l0/100 in size, self-biased operation and potentially 1~2% voltage tunable operation frequency; and (2) ultra-sensitive RF NEMS magnetoelectric magnetometers with ultra-low noise of ~1pT/Hz1/2 at 10 Hz for DC and AC magnetic fields sensing. These novel magnetoelectric devices show great promise for applications in compact, lightweight and power efficient sensors and sensing systems, ultra-compact antennas and for radars, communication systems, biomedical devices, IoT, etc.

Reference: 1. N.X. Sun and G. Srinivasan, SPIN, 02, 1240004 (2012); 2. J. Lou, et al., Advanced Materials, 21, 4711 (2009); 3. J. Lou, et al. Appl. Phys. Lett. 94, 112508 (2009); 4. M. Liu, et al. Advanced Functional Materials, 21, 2593 (2011); 5. T. Nan, et al. Scientific Reports, 3, 1985 (2013); 6. M. Liu, et al. Advanced Materials, 25, 1435 (2013); 7. M. Liu, et al. Advanced Functional Materials, 19, 1826 (2009); 8. Ziyao Zhou, et al. Nature Communications, 6, 6082 (2015). 9. T. Nan, et al. Nature Comm. 8, 296 (2017).

Short Bio: Nian Sun is professor at the Electrical and Computer Engineering Department, Director of the W.M. Keck Laboratory for Integrated Ferroics, Northeastern University, and Thrust Leader of 2-D Multiferroics in the NSF ERC Transitional Applications of Nanoscale Multiferroic Systems (TANMS). He received his Ph.D. degree from Stanford University. Prior to joining Northeastern University, he was a Scientist at IBM and Hitachi Global Storage Technologies. Dr. Sun was the recipient of the NSF CAREER Award, ONR Young Investigator Award, the Søren Buus Outstanding Research Award, etc. His research interests include novel magnetic, ferroelectric and multiferroic materials, devices and subsystems. He has over 240 publications and over 20 patents and patent applications. One of his papers was selected as the “ten most outstanding full papers in the past decade (2001~2010) in Advanced Functional Materials”. Dr. Sun has given over 100 plenary or invited presentations and seminars in national and international conferences and universities. He is an editor of Sensors, and IEEE Transactions on Magnetics, and a fellow of the Institute of Physics, and of the Institution of Engineering and Technology.

Prof. Quandt

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Kolloquiumsvortrag (ET/IT), Prof. Sawodny, Institut für Systemdynamik, Universität Stuttgart / am 16.07.2018

16.07.2018 von 17:15 bis 18:00

Institute Ostufer, Geb. D, "Aquarium", Kaiserstr. 2, 24143 Kiel

Titel: folgt

Abstract: folgt

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