TY  - CHAP
A1  - Simsek, Beril
A1  - Krause, Hans-Joachim
A1  - Engelmann, Ulrich M.
ED  - Digel, Ilya
ED  - Staat, Manfred
ED  - Trzewik, Jürgen
ED  - Sielemann, Stefanie
ED  - Erni, Daniel
ED  - Zylka, Waldemar
T1  - Magnetic biosensing with magnetic nanoparticles: Simulative approach to predict signal intensity in frequency mixing magnetic detection
T2  - YRA MedTech Symposium (2024)
N2  - Magnetic nanoparticles (MNP) are investigated with great interest for biomedical applications in diagnostics (e.g. imaging: magnetic particle imaging (MPI)), therapeutics (e.g. hyperthermia: magnetic fluid hyperthermia (MFH)) and multi-purpose biosensing (e.g. magnetic immunoassays (MIA)). What all of these applications have in common is that they are based on the unique magnetic relaxation mechanisms of MNP in an alternating magnetic field (AMF). While MFH and MPI are currently the most prominent examples of biomedical applications, here we present results on the relatively new biosensing application of frequency mixing magnetic detection (FMMD) from a simulation perspective. In general, we ask how the key parameters of MNP (core size and magnetic anisotropy) affect the FMMD signal: by varying the core size, we investigate the effect of the magnetic volume per MNP; and by changing the effective magnetic anisotropy, we study the MNPs’ flexibility to leave its preferred magnetization direction. From this, we predict the most effective combination of MNP core size and magnetic anisotropy for maximum signal generation.
Y1  - 2024
SN  - 978-3-940402-65-3
U6  - https://doi.org/10.17185/duepublico/81475
N1  - 4th YRA MedTech Symposium, February 1, 2024. FH Aachen, Campus Jülich
SP  - 27
EP  - 28
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Schmitz, Annika
A1  - Apandi, Shah Eiman Amzar Shah
A1  - Spillner, Jan
A1  - Hima, Flutura
A1  - Behbahani, Mehdi
ED  - Digel, Ilya
ED  - Staat, Manfred
ED  - Trzewik, Jürgen
ED  - Sielemann, Stefanie
ED  - Erni, Daniel
ED  - Zylka, Waldemar
T1  - Effect of different cannula positions in the pulmonary artery on blood flow and gas exchange using computational fluid dynamics analysis
T2  - YRA MedTech Symposium (2024)
N2  - Pulmonary arterial cannulation is a common and effective method for percutaneous mechanical circulatory support for concurrent right heart and respiratory failure [1]. However, limited data exists to what effect the positioning of the cannula has on the oxygen perfusion throughout the pulmonary artery (PA). This study aims to evaluate, using computational fluid dynamics (CFD), the effect of different cannula positions in the PA with respect to the oxygenation of the different branching vessels in order for an optimal cannula position to be determined. The four chosen different positions (see Fig. 1) of the cannulas are, in the lower part of the main pulmonary artery (MPA), in the MPA at the junction between the right pulmonary artery (RPA) and the left pulmonary artery (LPA), in the RPA at the first branch of the RPA and in the LPA at the first branch of the LPA.
Y1  - 2024
SN  - 978-3-940402-65-3
U6  - https://doi.org/10.17185/duepublico/81475
N1  - 4th YRA MedTech Symposium, February 1, 2024. FH Aachen, Campus Jülich
SP  - 29
EP  - 30
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Kahra, Marvin
A1  - Breuß, Michael
A1  - Kleefeld, Andreas
A1  - Welk, Martin
ED  - Brunetti, Sara
ED  - Frosini, Andrea
ED  - Rinaldi, Simone
T1  - An Approach to Colour Morphological Supremum Formation Using the LogSumExp Approximation
T2  - Discrete Geometry and Mathematical Morphology
N2  - Mathematical morphology is a part of image processing that has proven to be fruitful for numerous applications. Two main operations in mathematical morphology are dilation and erosion. These are based on the construction of a supremum or infimum with respect to an order over the tonal range in a certain section of the image. The tonal ordering can easily be realised in grey-scale morphology, and some morphological methods have been proposed for colour morphology. However, all of these have certain limitations.
In this paper we present a novel approach to colour morphology extending upon previous work in the field based on the Loewner order. We propose to consider an approximation of the supremum by means of a log-sum exponentiation introduced by Maslov. We apply this to the embedding of an RGB image in a field of symmetric 2x2 matrices. In this way we obtain nearly isotropic matrices representing colours and the structural advantage of transitivity. In numerical experiments we highlight some remarkable properties of the proposed approach.
Y1  - 2024
SN  - 978-3-031-57793-2
U6  - https://doi.org/10.1007/978-3-031-57793-2_25
N1  - Third International Joint Conference, DGMM 2024, Florence, Italy, April 15–18, 2024
SP  - 325
EP  - 337
PB  - Springer
CY  - Cham
ER  -