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A General Overview of Space Robotics

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Intelligente Systeme: Abteilungen


Intelligente Systeme: Wahrnehmen - Lernen - Handeln

Paul-Peter Ewald Kolloquium

298 1310040000

Paul-Peter Ewald Kolloquium 2011

Der Preisträger Markus Rauscher hat zur Theorie der Nanofluidik und der Benetzbarkeit sowie zur Rheologie im Nanobereich hervorragende wissenschaftliche Arbeiten geleistet, die ihm, und damit auch dem MPI-IS, vormals MF, internationales Ansehen gebracht haben. [mehr]

297 1342785600

Paul-Peter Ewald Kolloquium 2012

Der Preisträger Stefan Harmeling hat neue Algorithmen entwickelt zur Dekonvolution (Entfaltung) von Bildern. Damit hat er herausragende Ergebnisse bei verschiedenen wissenschaftlichen Fragestellungen erzielt und diese bei international renommierten Konferenzen veröffentlicht. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

536 1373295600

Neue Effekte bei Varistoren aus Zinkoxid: Lokalisierung des Stromtransportes, Asymmetrie des Verhaltens der Korngrenzen und Druckabhängigkeit der elektrischen Eigenschaften

Varistoren sind polykristalline Halbleiterbauelemente mit einer stark nicht-linearen Strom- Spannungs- Kennlinie, die als Überspannungsschutz von elektrischen und elektronischen Systemen Verwendung finden. Sie werden aus geeignet dotiertem (Bi, Al, Co, Mn, ...) ZnO-Pulvern durch Sintern hergestellt. Dabei werden Ionen in der Korngrenzen eingebaut und längs der Korngrenzen bilden sich Raumladungszonen (Doppel- Schottky Barrieren; DSBs), welche die Ladungen in den Korngrenzen kompensieren und eine elektrostatische Barriere für den Elektronentransport bilden. Unterhalb einer charakteristischen Spannung, der Schaltspannung VB, sind die Varistoren gute elektrische Widerstände. Bei höheren Spannungen (V > VB ) werden heiße Elektronen und durch Stoßionisation auch Elektronen-Loch Paare erzeugt. Die Löcher wandern zur Korngrenze, wo sie mit den dort gebunden Elektronen rekombinieren und so die Potentialbarre abbauen. Dadurch steigt der Strom I überproportional mit der Spannung V an (I ~ V α) an. Der Exponent kann Werte über 100 (α>100) erreichen. Experimentelle Untersuchungen an Varistoren zeigen eine Reihe überraschender Effekte. So kann es z.B. bei Erreichen der Schaltspannung zu einer Lokalisierung des Stromtransportes kommen. Das "stromtragende" Volumen kann dabei auf Bruchteile von Prozenten des Bauteilvolumens schrumpfen. Dies führt dann zu einer starken lokalen Erwärmung. Es kann auch zum lokalen Aufschmelzen und zur Zerstörung des Bauteiles kommen. Sehr kleine Bauteile, so wie sie in der modernen Mikroelektronik als Überspannungsschutz verwendet werden, zeigen häufig eine starke Streuung der elektrischen Eigenschaften und je nach Vorzeichen des angelegten Feldes unterschiedliche elektrische Eigenschaften. Dies konnte durch komplementäre experimentelle Techniken (lock-in Thermographie, keramographische Präparation relevanter Korngrenzen, scanning surface potential microscopy, EBSD, …) auf das Verhalten einzelner Korn- Kornübergänge zurückgeführt werden. Durch Messen der Strom-Spannungs-Kennlinie der relevanten Korngrenzen (4-Punkt Technik) konnte gezeigt werden, daß deren Verhalten vom Vorzeichen des elektrischen Feldes abhängt und daß die Orientierungsbeziehungen zwischen den Körnern dabei eine Rolle spielen. Weiters konnte gezeigt werden, daß der elektrische Widerstand von Bauteilen sich unter mechanischem Druck um nahezu das 1000-fache verändern kann. Die Höhe der Potentialbarrieren hängt von der Zahl der Ladungsträger in den Korngrenzen ab. Wegen der Piezoelektrizität der ZnO-Kristalle werden diese von den Eigenspannungen in der Keramik und den Orientierungsbeziehungen zwischen den Körnern beeinflußt. Auch die Druckabhängigkeit des Widerstandes ist auf die Piezoelektrizität zurückzuführen. Diese Zusammenhänge können durch ein 3-dimensionales Netzwerkmodell mit einem realistischen Gefüge beschrieben werden, in dem die Mikroeigenspannungen aufgrund der anisotropen thermischen Ausdehnung der Körner nach dem Sintern und die dadurch bewirkten Ladungsverschiebungen in den Korngrenzen berechnet werden. [mehr]

Günter Petzow Kolloquium

296 1374231600

Günter Petzow Kolloquium 2013

Der Preiträger Zumin Wang wird für seine Forschungsarbeit über die Rolle der Thermodynamik und Kinetik von Grenzflächen bei der metallinduzierten Kristallisation von Silizium geehrt. Diese neuen Erkenntnisse können dazu beitragen, Solarzellen bei niedrigen Temperaturen auf billigen, leichten und flexiblen Materialien wie Kunststoff, Glas oder gar Papier herzustellen. [mehr]

Max Planck Lecture

277 1381395600

Some small steps toward Artificial Life

No one has successfully defined life but the properties we often associate with living things are motility, metabolism and self-replication. According to the Nobel Laureate Richard Feynman: “What I can’t create, I don’t understand”. We thought we’d give it a shot - understanding life - and in the process we’ve made two different systems, one that exhibits both autonomous motility and metabolism and another which is the first artificial system which can replicate arbitrarily designed motifs. The first system, artificial swimmers, provides insight into many natural phenomena such as a flocking of birds and schooling of fish. The second system uses diurnal cycles of temperature and light and at present is doubling each cycle, growing exponentially. It provides a new way of producing many, many copies of nanoscale devices and may give insights into the origin of conventional life on earth. [mehr]

Girls' Day

Günter Petzow Kolloquium

294 1406286000

Günter Petzow Kolloquium 2014

Der Preisträger Ilia Platzmann wird geehrt für seine Arbeiten im Bereich der synthetischen Biologie, insbesondere über den Einsatz der Materialwissenschaften und Mikrofluidik zur Synthese intelligenter Materialien mit extern steuerbaren Eigenschaften. Diese neuen Erkenntnisse können dazu beitragen, biologische Systeme wie künstliche Zellen zu schaffen oder die Zellumgebung, welche maßgeblich Einfluss auf die Zellentwicklung und -steuerung hat, nachzuahmen. [mehr]

Colloquium Materials Science

2884 1445938204

Structure and Function of Materials Interfaces

Though interfaces represent only a small fraction of the overall volume of biological and man-made materials, their influence on the functional properties like fracture toughness, hardness and overall mechanical integrity is decisive. In this presentation, the relationship between microstructure and mechanical properties of interface-based materials like wood, multilayered thin films and ceramic nanocomposites will be discussed on the bases of experimental data obtained using synchrotron XRD and transmission electron microscopy techniques. The results demonstrate that through clever microstructural and interface design, it is possible to enhance mechanical properties of materials significantly. [mehr]

Physikalisches Kolloquium

5260 1460364752

Strongly interacting electrons: from Kondo effect to quantum criticality

About 50 years ago, Jun Kondo explained a phenomenon in solid-state physics that at that time had been around already for three decades and had defied an explanation: the low-temperature resistance minimum in metals containing dilute magnetic impurities. His calculation showed that the minimum arises from a temperature dependent interaction of conduction electrons with those impurities, leading to an increase of the electron scattering rate towards low temperature. Today, the term Kondo effect entails many phenomena associated with this interaction.Around each impurity, a "local" Fermi liquid is formed. Starting in the 70's, intermetallic compounds with a stoichiometric array of rare-earth “impurities” were investigated. In many cases, these compounds exhibit features of the Kondo effect in the dilute case. The lattice-coherent superposition of the Kondo “impurities” leads to a Fermi liquid with electronic quasiparticles of very large effective masses (up to several hundreds of the free-electron mass). These heavy-fermion systems can exhibit most unusual properties such as superconductivity arising from the heavy quasiparticles, or unusual types of magnetic order. Subsequently, it was found that the transition between a magnetic and nonmagnetic ground state can be easily achieved by a non-thermal parameter such as pressure, magnetic field, or composition. These phase transitions, if of second order, reveal unusual critical properties nicknamed “non-Fermi-liquid behavior” due to the fact that the quantum energy of fluctuations becomes a relevant energy scale as the temperature is lowered toward absolute zero. Several different types of quantum phase transitions have been identified, as will be discussed in this talk. Examples of these quantum phase transitions will be introduced and different routes to quantum criticality will be discussed. [mehr]

Special Talk, Stuttgart

790 1430816454

Probe light inside the rat brain for single-vessel fMRI

In this talk, we will see through the large voxel acquired from conventional fMRI method to decipher the contribution from distinct vascular components to fMRI signal. The individual arterioles and venules penetrating cortices were directly mapped based on the blood in-flow effect and fast T2* decay of the de-oxygenated blood. Distinct blood-oxygen level dependent (BOLD) and cerebral blood volume (CBV) fMRI signal was detected on individual venules and arterioles with 100ms temporal resolution. This fast sampling rate allows us to identify the activity-evoked hemodynamic signal propagation through cerebrovasculature in the deep cortical layer of the somatosensory cortex. In addition, I will show you our recent progress on light-driven fMRI with optogenetics and fiber-optic mediated calcium recording methods through GCaMP6. We are aiming to implement fiber-optic mediated optical methods to makes fMRI more suitable for mechanistic studies on neurovascular coupling. At last, I will present our recently developed MRI-guided robotic arms to target deep brain nuclei in rats. If you are interested in a meeting with Dr. Xin Yu, please contact Janina Sieber at: officesitti@is.mpg.de [mehr]

Max Planck Lecture

831 1430995035

Ultracold atoms as quantum simulators for new materials – synthetic magnetic fields and topological phases

When atoms are cooled to nanokelvin temperatures, they can easily be confined and manipulated with laser beams. Their interactions can be tuned with the help of magnetic fields, making them strongly or weakly interacting, repulsive or attractive. Crystalline materials are simulated by placing the atoms into an optical lattice, a periodic interference pattern of laser beams. Recently, synthetic magnetic fields have been realized. With the help of laser beams, neutral atoms move around in the same way as charged particles subject to the magnetic Lorentz force. These developments should allow the realization of quantum Hall systems and topological insulators with ultracold atoms. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

2883 1445937905

Macroionic complex coacervation: concentration without perturbation of soft colloids

Complex coacervation is a liquid-liquid phase separation from solutions of oppositely charged polymers and colloids (e.g. polyelectrolytes, proteins, surfactant micelles). Brought to light more than 50 years ago, this field of science is experiencing a vigorous revival due to applications that include encapsulation, enzyme immobilization and separations, in biomedicine, food science and pharmaceutics. Modern methods of scattering, microscopy and rheology reveal to dynamic, equilibrium mesophases within optically clear coacervates, and help us understand why and how these structures self-assemble; while the earlier systems studied, comprising gelatin and other food proteins and polysaccharides, are superseded by more diverse macromolecules such as growth factors, hormones, disordered proteins, chitosan and hyaluronic acid. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

2882 1445937644

Self-Powered Catalytic Nanomotors and Pumps

Self‐powered nano and microscale moving systems are currently the subject of intense interest. We have discovered that catalyst particles (both colloidal and molecular scale) generate sufficient mechanical force through substrate turnover to cause their own movement. Furthermore, the movement becomes directional through the imposition of a gradient in substrate concentration. The same catalyst particles, when anchored on a surface, pump ambient fluid directionally in the presence of the substrate. Possible applications involve sorting of catalysts based on activity, enhanced substrate channeling in tandem catalysis, enhanced mixing, and precisely controlled microfluidics. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

2881 1445937137

Interplay between Merlin, Rac1 and Yap governs organ size and tumorigenesis

Neurofibromatosis type 2 (NF2) is caused by mutations of the tumor suppressor MERLIN/NF2. NF2 inactivation has been shown to lead to the activation of both YAP and RAC1. However, the relationship between RAC1 and the NF2-HIPPO-YAP pathway and how RAC1 contributes to NF2 tumorigenesis have not been elucidated. Using the mouse liver as a model system, we interrogated the genetic hierarchy of Nf2, Rac1 and Yap. Our findings showed that Yap and Rac1 function downstream of Merlin/Nf2 as two central signaling switches of a complex signaling network, which controls cell cycle progression, inflammation, DNA damage response, and senescence during NF2 tumorigenesis. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

2612 1444131015

Towards Interactive Materials and Devices

The development of materials and devices with active and adaptive properties is one of the most profound challenges of today’s materials research. For exceeding the passive functionalities of existing materials, we more focus on programmable material properties, integration of active characteristics into interacting material systems, and related application in sustainable materials engineering and biotechnology. In this talk, I will present two example to show our latest progress in developing interactive materials and devices based on soft matter nanotechnology. The examples will include: (1) how natural biomaterials like proteins can be used for the fabrication of solid-state memory nanodevices, and (2) how to build soft electronic devices with advanced functions based on inorganic materials. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

2722 1444130996

Surface Tension Effects in Microsystems

I will present my research on capillary forces and surface tension effects in microsystems (how to calculate capillary forces), including the Drobot (droplet robot) and ongoing research on thermocapillary micromanipulation (how to control surface tension effects). Pierre Lambert is Associate Professor at Université libre de Bruxelles. He obtained his MD in electromechanical engineering at ULB in 1998, his PhD in engineering sciences in the same university in 2004 and his habilitation in Université de Franche-Comté in 2010. [mehr]

MPI IS “Grassroots” initiative

2786 1446559833

"Thesis in Three" Award 2015

Presenting your research in a clear, concise and coherent way is an important skill for a successful academic career. Show that you are able to summarise your Bachelor’s, Master’s or PhD thesis or Postdoc project in three minutes and a maximum of three slides and win this year’s MPI IS “Thesis in Three” Award. The goal is to present your project, its context and significance in a general and understandable way, so any person regardless of their academic background can understand it. [mehr]

Physikalisches Kolloquium

5240 1460364165

Dynamical solitons in individual and mutually synchronized spin-torque and spin-hall effect driven nano-oscillators

Nano-contact spin-torque nano-oscillators (STNOs) and spin Hall effect nano-oscillators (SHNOs) provide excellent playgrounds for the study of highly non-linear and nanoscopic spin wave modes and phenomena. While originally studied for their potential as highly broadband microwave signal generators, these devices now attract a rapidly growing interest as spin wave generators in magnonic devices and as skyrmion injectors in magnetic nanowire based memories. In my talk I will give an overview of how magnetodynamical solitons, such as spin wave bullets, magnetic droplets, and dynamical skyrmions, can be nucleated and controlled in both STNOs and SHNOs and how these, as well as propagating spin waves, can be utilized to mutually synchronize a very large number of STNOs and SHNOs. [mehr]

Arbeitskreis Gesundheit / Board of Corporate Health

4338 1454421427

Die Biologie der Begeisterung - und wie sich Stress vermeiden lässt / Invitation Lecture Dr. Spörer - Biology of enthusiasm - and how stress can be avoided

[mehr]

Special Public PhD Thesis Defense Talk

Special Talk, Stuttgart

Schulung

5263 1461144785

COMSOL User Meeting

[mehr]

Girls' Day

5028 1457684367

Girls' Day 2016

Weitere Informationen zum Girls´ Day finden Sie auf http://www.girls-day.de/ [mehr]

Max Planck Lecture

5027 1465285679

On the Nonlinear Dynamics of Collective Decision-Making in Nature and Design

The successful deployment of complex, multi-agent systems requires well-designed, agent-level control strategies that accommodate sensing, communication, and computational limitations on individual agents. Indeed, many applications demand system-level dynamics to be robust to disturbance and adaptive in the face of changes in the environment. Remarkably, animal groups, from bird flocks to fish schools, exhibit just such robust and adaptive behaviors, even as individual animals have their own limitations. To better understand and leverage the parallels between networks in nature and design, a principled examination of collective dynamics is warranted. I will describe an analytical framework based on nonlinear dynamical systems theory for the realization of collective decision-making that allows for the rigorous study of the mechanisms of observed collective animal behavior together with the design of distributed strategies for collective dynamics with provable performance. [mehr]

Arbeitskreis Gesundheit / Board of Corporate Health

5710 1465218453

Gesundheitstag Stuttgart

[mehr]

Townhall Meeting

Tag der offenen Tür

5688 1465214148

Tag der offenen Tür, Standort Tübingen

Einblicke in die Labore, Experimente zum Mitmachen und ein Science Slam: Im Juni gibt es Forschung zum Anfassen [mehr]

Special Talk, Stuttgart

6201 1469001525

Spirulina-templated Magnetic Helical Microswimmers for Biomedicine

In recent years, micro- and nanorobots have drawn lots of attention because of their promising potential in minimally invasive biomedical applications. Among them, magnetic helical swimming microrobots, inspired by E. coli bacteria, show interesting properties, such as precise remote actuation and 3-D navigation in a variety of fluidic environments using an external low-strength rotating magnetic field in vitro and in vivo. In this talk, Spirulina-templated helical swimming microrobots will be introduced, and their potential applications in biomedicine will be discussion. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

6605 1473934199

Biologically inspired model-free robotic design optimization: any hope?

There are many physical phenomena in the real world that cannot be mathematically modeled. If we consider machine design problems that cope with such physical dynamics, we need heuristic search of design in physical systems, which we call the model-free (robotic) design optimization. We are exploring how such a new paradigm of design optimization processes can be realized, though there are a number of known challenges such as the dimensionality problem, the scalability problem, and the reality gap. In this talk, I would like to introduce some of the attempts in our laboratory and discuss challenges and perspectives. [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

6644 1474538394

Soft, Stretchable, and Reconfigurable Materials for Electronics and Actuators?

This talk will describe efforts in our research group to control the shape and function of soft materials (liquid metals, polymers and hydrogels) for applications that include stretchable electronics, soft robots, and self-folding polymer sheets.  The research harnesses interfacial phenomena, micro fabrication, patterning, and thin films.  [mehr]

Max Planck Intelligent Systems Colloquium, Stuttgart

6575 1473836938

Novel Alliance between Advanced Materials and Volatile Biomarkers for Non-Invasive Medical Evaluation

Medical evaluation for early detection of a disease is required to reveal groups of individuals from the general population in whom the likelihood of the disease is increased and who could benefit from further medical evaluation. The ideal medical evaluation is high-accuracy, low-cost, non-invasive, easily repeatable, effortlessly operated by a lay-person and has minimal impact on the person’s daily activities. In our research, we tackle these requirements by the development of novel solid-state and self-healable flexible1 devices/sensors that are based on advanced functional materials as well as electronic sensory nanoarrays for profiling volatile biomarkers that are emitted from cells in the affected area and that can be detected either via the exhaled breath or from the skin, without going invasively into the human body. [mehr]

5030 1485956544

Gedenkkolloquium für Alfred Seeger

Am 18. Oktober 2016 fand ein Gedenkkolloquium für Alfred Seeger statt, der genau ein Jahr zuvor verstorben war. Beim Gedenkkolloquium würdigten mehrere Sprecher die Person und die herausragenden wissenschaftlichen Leistungen von Herrn Seeger. Herrn Seegers Tochter Ulrike fand berührende Schlussworte. Prof. Trebin berichtete über seine persönlichen Erfahrungen bei der Zusammenarbeit mit Herrn Seeger. Alle diese Vorträge finden sich in der vorliegenden Gedenkseite. Die Anregung, ein Gedenkkolloquium zu veranstalten, kam von Prof. Urban. Es wurde dann i.W. von Prof. Trebin in Zusammenarbeit mit Prof. Kronmüller und Frau Stumpf vom MPI für Intelligente Systeme organisiert. [mehr]

Sondervortrag

7369 1476781395

"Darüber reden kann helfen..."

[mehr]

Arbeitskreis Gesundheit / Board of Corporate Health

9394 1489578655

Job- & Brainfood - essen im Arbeitsalltag

Fit im Job Leistungsfähigkeit bis ins hohe Alter ist ein Bestreben von allen Menschen. Dazu bedarf es der richtigen Lebensmittelgrundlage. Warum sind süße Heißhungerattacken bei Stress und körperlicher Anstrengung keine Seltenheit? Tipps für das ideale Brainfood. Rezeptvorschläge für die Vesperbox. [mehr]

Girls' Day

9226 1489664233

Girls' Day 2017

Weitere Informationen zum Girls´ Day finden Sie auf http://www.girls-day.de/ [mehr]

Max Planck Intelligent Systems Colloquium

Max Planck Lecture

10411 1498820826

The Three Pillars of Fully Autonomous Driving

[mehr]

 
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