DSB Seminars 2015

Seminars are usually on Thursdays from 12.15 to 13.00 (maximum) in the DSB-lab (room 4270, 4. floor North) unless otherwise noted.

3. Dec 2015	Fabrice Gabriel Prieur	DSB	Title: Ultrasound mediated drug delivery. Abstract: The action of cavitation is well known in the shipping industry. Cavitating bubbles can severely damage ship propellers. But cavitation can also be beneficial when it is generated in a controlled manner in presence of living tissue. Using ultrasound one can create gas bubbles and generate cavitation activity to influence the local intake of therapeutic molecules. Cavitation bubbles have a permabilization effect on both the blood vessels and the cell membranes. This effect can be used to locally enhance the intake of chemotherapeutic drugs or to inject DNA fragments into living cells opening the path to in vivo gene therapy.
26. Nov 2015	Sverre Holm	DSB	Title: Best of Ultrasonics Symposium Taipei Abstract: I'll go through my notes, i.e. annotated pdfs, from the symposium in Taipei last week: http://ewh.ieee.org/conf/ius/ius_2015/. They cover these topics, one per file: Elasticity Sparse & compressive Image Reconstruction & Beamforming Low Intensity Ultrasound & Acoustic Palpation See also blog post Ultralydsymposium i Taipei.
19. Nov 2015	Ann Elisabeth Albright Blomberg	DSB	Title: Array signal processing for marine gas seep detection. Abstract: There is a significant and increasing need for reliable, cost-effective, and preferably automatic methods for detecting and monitoring marine gas seeps. Naturally occuring seepage of methane and CO2 is common in many areas where geological structures allow these greenhouse gases to penetrate the seafloor and enter the water column and potentially also the atmosphere. In addition, gas seeps may occur in relation to offshore oil and gas production, as well as subsea CO2 storage. Characteristic acoustic properties of free gas makes sonar a highly suitable method for marine gas seep detection. Existing sonar methods can detect gas seeps, but typically rely heavily on an operator's ability to scrutinize the data and identify seeps. Limited effort has been directed towards optimizing sonar methods for reliable and potentially automatic seep detection. The main objective of my postdoc project is to develop new and improve existing methods by incorporating characteristic acoustic and spatial properties of gas seeps into array signal processing algorithms. I will present preliminary results and work in progress, including examples from an interferometric sidescan sonar, a synthetic aperture sonar (SAS), and maybe a sneak preview of data from a calibrated broadband split-beam sonar (EK80).
12. Nov 2015	Trond Bergh	Squarehead / DSB	Audio-visual speaker diarization (Camera-Aided Microphone Arrays)
5. Nov 2015	Vikash Pandey	DSB	A revised version of : A fractional calculus approach to the propagation of waves in an unconsolidated granular medium
5. Nov 2015	Ole Marius Hoel Rindal	DSB	Compounded Plane Wave Imaging And The Coherence Factor
22. October 2015	Vikash Pandey	DSB	A fractional calculus approach to the propagation of waves in an unconsolidated granular medium, upcoming presentation at Acoustical Society of America meeting 3 Nov 2015.
15. October 2015	Ørjan Grøttem Martinsen	Department of Physics	Bioimpedance - a versatile tool in medicine. The Oslo Bioimpedance Group has used impedance measurements for characterizing biological tissue since 1980. This talk will include a variety of phenomena and applications, such as memristors, diabetes, sweating, impedance cardiography, constant phase elements and resuscitation.
8. October 2015 11.30-12.00	Sverre Holm	DSB	Four ways to justify temporal memory operators in the lossy wave equation It is easy to set up nice fractional partial differential equations for e.g. waves in viscous media, heat diffusion, fractional capacitors, and even a fractional Schrödinger equation. But is it a mathematical exercise or is it grounded in a physical phenomenon? I will therefore analyze the fractional wave equation in viscous media with the aim of finding out whether it is based on inductive or deductive reasoning. Presentation to be held at IEEE Ultrasonics Symposium, 21-24 Oct 2015, Taipei and with some variations at the Acoustical Society of America meeting 2-6 Nov 2015.
17. September 2015	Fabrice Gabriel Prieur	DSB	Therapeutic ultrasound, Applications and Research paths. Abstract: The therapeutic use of ultrasound is very appealing as it is non-invasive, cheap most of the time, and versatile. By sweeping through frequency and intensity ranges, one encounters therapeutic applications from mild hyperthermia all the way to mechanical tissue ablation. In this presentation, I will first give an overview of how ultrasound can be used as a therapy in a clinical setting. In willthen presented in more details the projects I have been working on. Their goal is the enhancement of local drug delivery in cancer therapyusing acoustic cavitation.
10th September 2015	Knut Landmark	FFI (Defence Research Institute)	Reducing scalloping in synthetic aperture radar images overusing a composite image transform
3. September 2015	Tor Inge Birkenes Lønmo	DSB / Kongsberg Maritime	Interference Rejection for sonar via Low Complexity Adaptive Beamforming
18 June 2015	Ole Marius Hoel Rindal	DSB	FOCUS, Fast Object-Oriented C ++ Ultra Sound Simulator
12 June 2015 Friday!	Sten Roar Snare	DSB / GE Vingmed Ultrasound	An introduction to structure tensors
4 June 2015 from 13.15 to 14.00	Tor Inge Birkenes	DSB / Kongsberg Maritime	Low Complexity Adaptive Beamforming Applied to Sonar Imaging

Organizers: Ole Marius Hoel Rindal and Sverre Holm

Published Mar. 2, 2016 12:06 PM - Last modified Nov. 1, 2021 3:37 PM