3D microcontact printing for combined chemical and topographical patterning on porous cell culture membrane. - In: ACS applied materials & interfaces, ISSN 1944-8252, Bd. 10 (2018), 26, S. 22857-22865
https://doi.org/10.1021/acsami.8b06585
Optical tweezers for trapping in a microfluidic environment. - In: Applied optics, ISSN 2155-3165, Bd. 57 (2018), 20, S. 5733-5742
https://doi.org/10.1364/AO.57.005733
In-service characterization of a polymer wick-based quasi-dry electrode for rapid pasteless electroencephalography. - In: Biomedical engineering, ISSN 1862-278X, Bd. 63 (2018), 4, S. 349-359
https://doi.org/10.1515/bmt-2016-0193
Bewertung nach der Leitmerkmalmethode mittels tiefenkamerabasierter kinematischer Analyse. - In: Wirtschaftspsychologie, ISSN 1615-7729, Bd. 20 (2018), 1, S. 50-57
Zur Gefährdungsanalyse von manuellen Lastenhandhabungen empfiehlt die Bundesanstalt für Arbeitsschutz und Arbeitsmedizin (BAuA) unter anderem die Leitmerkmalmethode "Heben, Halten, Tragen". Ansatz dieses Beitrags ist die subjektive Beurteilung des "Leitmerkmals" Körperhaltung durch die Verwendung einer Tiefenkamera zur Bewegungsanalyse mit integrierter (markerloser) stick figure-Generierung reproduzierbar zu gestalten. Über eine Probandenstudie mit 30 Studenten wurden für die Analyse relevante Parameter ermittelt. Ziel ist es anhand eines parametrisierten Entscheidungsbaumes eine teilautomatisierte Kategorisierung der Körperhaltung durchzuführen. Diese hilft dem Beobachter als Unterstützungssystem bei der Entscheidungsfindung. Eine Farbcodierung (entsprechend einem Ampelsystem) ermöglicht es, eine direkte Rückkopplung an den Beobachter zu geben und somit Hinweise zur Optimierung des Arbeitsprozesses abzuleiten.
Fundus autofluorescence beyond lipofuscin: lesson learned from ex vivo fluorescence lifetime imaging in porcine eyes. - In: Biomedical optics express, ISSN 2156-7085, Bd. 9 (2018), 7, S. 3078-3091
https://doi.org/10.1364/BOE.9.003078
Experimental characterization and correlation of Mayer waves in retinal vessel diameter and arterial blood pressure. - In: Frontiers in physiology, ISSN 1664-042X, Bd. 9 (2018), Article 892, insges. 12 S.
https://doi.org/10.3389/fphys.2018.00892
On the influence of gas-liquid two-phase flow on Lorentz force velocimetry. - In: Measurement science and technology, ISSN 1361-6501, Bd. 29 (2018), 8, S. 085301, insges. 11 S.
Lorentz force velocimetry (LFV) is a contactless and non-invasive flow measurement technique for electrical conducting fluids. When the fluid passes a magnetic field, a Lorentz force will be generated. The force is proportional to the electrical conductivity, to the velocity of the fluid, and to the square of the magnetic flux density. It is possible to apply this technique over a range of conductivities varying from high values as for liquid metals to lower values as typically for electrolytes (e.g. salt water). The main challenge is measuring the force, which is six orders of magnitude smaller for electrolytes in comparison to liquid metals. It was shown that LFV is insensitive to the shape of different velocity profiles and especially to strongly asymmetric profiles as long as the volume flow is constant. However, the influence of a second gaseous phase on the force signal remains an open question. This is of fundamental interest especially for chemical and food processing industries. To examine this influence in detail, electrolyte flow with different volume flow fractions was investigated for the current study. By using frits, it is possible to generate a homogeneous distribution of the second (gaseous) phase in the electrolyte. Small electrolyte velocities or flow rates (v < 1.5 m s^-1, V1 = 225 l min^-1) enable the formation of slug flow and stratified wavy flow, and higher velocities (v > 1.8 m s^-1, V1 = 270 l min^-1) the formation of bubbly two-phase flow in the used test section. By this means, it is possible to study a wide range of flow patterns in a horizontal duct. The experimental results are in good agreement with the analytical estimations for fully dispersed flow. However, for a nonhomogeneous distribution of air the force signal deviates much stronger. An explanation can be the superposition of Lorentz forces and magnetic forces, caused by differences of the magnetic susceptibilities of water and air, which will be discussed in greater detail.
https://doi.org/10.1088/1361-6501/aaca8a
Sparsity order estimation from a single compressed observation vector. - In: IEEE transactions on signal processing, ISSN 1941-0476, Bd. 66 (2018), 15, S. 3958-3971
https://doi.org/10.1109/TSP.2018.2841867
Process characterization of powder based laser metal deposition on thin substrates. - In: Journal of laser applications, ISSN 1938-1387, Bd. 30 (2018), 3, S. 032506, insges. 6 S.
https://doi.org/10.2351/1.5040630
An analytical temperature-dependent design model for contour-mode MEMS resonators and oscillators verified by measurements. - In: Sensors, ISSN 1424-8220, Bd. 18 (2018), 7, 2159, insges. 21 S.
https://doi.org/10.3390/s18072159