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Publikationen von Professorinnen und Professoren der HAW Hamburg

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Said El-Busaidy, Bernd Baumann, Marcus Wolff, Lars Duggen und Henry Bruhns
Experimental and Numerical Investigation of a Photoacoustic Resonator for Solid Samples: Towards a Non-Invasive Glucose Sensor
Sensors, 19(13)
29 Juni 2019

Marker: TI-MP

Zusammenfassung: T-cell resonators have been used lately for non-invasive blood glucose measurements for photoacoustic spectroscopy on skin samples. A resonator has a significant role in determining the strength of the measured signal and the overall sensitivity of the sensor. Here we present results of the measurement of the photoacoustic signal of such a T-cell resonator. The signal is also modelled using the amplitude mode expansion method, which is based on eigenmode expansion and the introduction of losses in the form of loss factors. The measurement reproduced almost all the calculated resonances from the numerical models with fairly good agreement. The cause of the differences between the measured and the simulated resonances are explained. In addition, the amplitude mode expansion simulation model is established as a faster and computationally less demanding photoacoustic simulation alternative to the viscothermal model. The resonance frequencies from the two models differ by less than 1.8%. It is noted that the relative height of the amplitudes from the two models depends on the location of the antinodes within the different parts of the resonator. The amplitude mode expansion model provides a quick simulation tool for the optimization and design of macro resonators.

P. Buczek, S. Thomas, A. Marmodoro, N. Buczek, X. Zubizarreta, M. Hoffmann, T. Balashov, W. Wulfhekel, K. Zakeri und A. Ernst
Spin waves in disordered materials
Journal of Physics: Condensed Matter, (30):423001-

Marker: TI-IE


Edmund Weitz
Elementare Differentialgeometrie (nicht nur) für Informatiker
Verlag: Springer Spektrum, Wiesbaden
15 November 2019
ISBN: 978-3-662-60462-5

Marker: DMI-MT

Linus Wittmann, Petra Hampel und Gunter Groen
Gesund bleiben im Beruf: Psychotherapeutische Interventionen bei Arbeitsbelastungen.
Verlag: dgvt-verlag, Tübingen
ISBN: ISBN 978-3-87159-372-7

Marker: W&S


Michel Rottleuthner, Thomas C. Schmidt und Matthias Wählisch
An Energy-aware IoT Node for Sustainable Urban Sensing
Proc. of International Conference on Networked Systems (NetSys 2019), Demo Session
Verlag: IEEE Press, Piscataway, NJ, USA

Marker: TI-I

Zusammenfassung: This demo presents an energy-aware system designed for long-term deployments in urban sensing. It consists of a hardware-software co-design that allows for measuring and harvesting energy on class-1 IoT nodes. We focus on the self-management of energy and its integration with the RIOT operating system. The measurement module is composed of commodity components and designed for easy, flexible integration with various hardware platforms.

Julius Weyl, Daniel Glake, Ulfia A. Lenfers, Fabian Panse, Norbert Ritter und Thomas Clemen
Large-scale Traffic Simulation for Smart City Planning with MARS
Proc. of the Summer Simulation Conference, Berlin , Seite 12.
Langfeldt Felix und Gleine Wolfgang
Improved sound transmission loss of glass wool with acoustic metamaterials
26th International Congress on Sound and Vibration
7.-11. Juli 2019
ICSV26 Local Committee (Hrsg.) Proceedings of the 26th International Congress on Sound and Vibration
Verlag: Canadian Acoustical Association,

Marker: TI-FF

Technische Berichte:

Marcin Nawrocki, Thomas C. Schmidt und Matthias Wählisch
Uncovering Vulnerable Industrial Control Systems from the Internet Core
Technical Report
Dokument Nummer: arXiv:1901.04411
Open Archive:,
Januar 2019

Marker: TI-I

Zusammenfassung: Industrial control systems (ICS) are managed remotely with the help of dedicated protocols that were originally designed to work in walled gardens. Many of these protocols have been adapted to Internet transport and support wide-area communication. ICS now exchange insecure traffic on an inter-domain level, putting at risk not only common critical infrastructure, but also the Internet ecosystem (e.g., DRDoS attacks). In this paper, we uncover unprotected inter-domain ICS traffic at two central Internet vantage points, an IXP and an ISP. This traffic analysis is correlated with data from honeypots and Internet-wide scans to separate industrial from non-industrial ICS traffic. We provide an in-depth view on Internet-wide ICS communication. Our results can be used (1) to create precise filters for potentially harmful non-industrial ICS traffic, and (2) to detect ICS sending unprotected inter-domain ICS traffic, being vulnerable to eavesdropping and traffic manipulation attacks.


Said El-Busaidy, Bernd Baumann, Marcus Wolff und Lars Duggen
Modelling of an open photoacoustic resonator for blood glucose measurements
11 Juli 2019
ICPPP 2019

Marker: TI-MP

Konferenz-/Workshop-/Podiumsdiskussionsbeiträge, Ausstellungs-/Modenschaubeteiligungen:

Said El-Busaidy, Bernd Baumann, Marcus Wolff und Lars Duggen
Modeling the photoacoustic signal of an open resonator
Comsol User Day

Marker: TI-MP

Zusammenfassung: Photoacoustic sensors are well established for the detection of substances of small concentrations. Ordinarily these sensors make use of closed acoustic resonators for signal enhancement. Due to special requirements for certain applications we we need to consider an acoustic resonator with an opening. In the presentation we give an account of the challenges this bears for the simulation of the photoacoustic signal.

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Letzte Änderung: 23.01.15

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