Wissenschaftliches Kolloquium

Prof. Dr. Alexander Schlaefer gives a presentation on

Machine Learning for High Resolution Image Guidance

on May 10th, 2017 at 15.30 PM in room N.0010.

 

Abstract:

Precise localization of target structures inside a patient is a key requirement for many clinical applications, including minimally invasive surgery. Typical trade-offs include spatial resolution, temporal resolution, and field of view. We consider optical coherence tomography (OCT), which combines an imaging depth of 1-2 mm in soft tissue with high spatial and temporal resolution at approximately 10 μm and 1.5 MHz, respectively. Challenges include the need for online processing at high data rates and speckle noise complicating image processing. The talk will illustrate how OCT can be used for real time tracking of motion and deformation. Particularly, we will show how machine learning based approaches can be used to identify pose, interaction force, and tissue type from OCT image data.

Short Bio of the speaker:

  • 2001 Dipl.-Inf. degree, Artificial Intelligence Workgroup, Humboldt Universität zu Berlin
  • 2003 - 2007 Research Assistant, Institute for Robotics and Cognitive Systems, Universität zu Lübeck
  • 2007 Dr.-Ing. degree, Universität zu Lübeck
  • 2007 - 2008 Postdoctoral Research Scholar, Department of Radiation Oncology, Stanford University, CA/USA
  • 2008 - 2013 Assistant Professor, Medical Robotics, Universität zu Lübeck
  • 2013 - now Professor, Institute of Medical Technology, Hamburg University of Technology

All interested people are kindly invited. (Foto: TUTECH/Marco Grundt)


Prof. Dr. Arne Jacob gives a presentation on

Packaging Approaches for Broadband Communication Systems

on April 12th, 2017 at 15.30 PM in room N.0010.

 

Abstract:

One remedy to satisfy the ever increasing need for bandwidth is to move communication systems to higher operating frequencies. Besides the challenges imposed by the decreasing wavelength and the associated miniaturization, various other design constraints may apply depending on the application. This has a strong impact on component and subsystem packaging. In this presentation, three examples are considered which illustrate possible approaches. The first one deals with a 2.5D circuit integration in LTCC (Low-Temperature Co-fired Ceramics) for satellite applications and with the on-orbit verification of the concept. The second example reports a package design for solid-state power amplifiers to be used in active multi-beam satellite antennas. At last, a low-cost packaging approach for 100 Gbps communication systems is sketched.

Short Bio of the speaker:

  • 1979 Dipl.-Ing. degree in Electrical Engineering, High-Frequency Technology, TU Braunschweig
  • 1986 Dr.-Ing. degree, TU Braunschweig
  • 1986 - 1988 "Fellow", RF Group, Super Proton Synchrotron, CERN, Geneva, Switzerland
  • 1988 - 1990 Staff Scientist, Accelerator and Fusion Research Division, Lawrence Berkeley Laboratory, Berkeley, CA/USA
  • 1990 - 2004 Professor of Microwave Engineering, TU Braunschweig
  • 2004 - now Professor of High-Frequency Technology, Hamburg University of Technology

All interested people are kindly invited.


Prof. Dr. Volker Turau gives a presentation on

Data Stream Processing in Wireless Networks

on March 8th, 2017 at 15.30 PM in room N.0010.

 

Abstract:

A data stream is a sequence of digitally encoded signals that represent continuously recorded information from a particular location. Embedded into the physical world, wireless sensor networks can aggregate such data streams from different locations into a single stream. Monitoring and analyzing large and rapidly changing streams of data that arrive online in an environment with with bounded resources (bandwidth, memory, etc.) is a challenging task. The unbounded length of a data stream makes it impossible to store the entire contents of the stream, yet many applications demand to retain some ability to execute queries referencing past data. The talk considers the problem of maintaining statistics over streams with regard to all or the last n data elements seen so far.

Short Bio of the speaker:

  • Academic studies at University of Mainz
  • Diploma degree in mathematics in 1984
  • PhD degree in mathematics in 1987 (subject: algebraic groups)
  • Postdoc positions in Manchester, Karlsruhe and Berkeley
  • Member of TUHH since September 2002

All interested people are kindly invited.