Mannheim University of Applied Sciences

About: Mannheim University of Applied Sciences is a education organization based out in Mannheim, Germany. It is known for research contribution in the topics: Gene & Mass spectrometry imaging. The organization has 593 authors who have published 779 publications receiving 19248 citations. The organization is also known as: FH Mannheim & Mannheim College.

Transfer, Assembly, and Embedding of Small CMOS-Die Arrays for the Build-Up of Flexible Smart Implants

Abstract: The integration of small wafer-based devices into flexible polymeric systems allows the fabrication of smart systems. Such systems are of high interest and are being developed in different fields. Active implants for biomedical applications promise new insights and therapy possibilities including the novel field of electroceuticals, which focuses on the treatment of systemic diseases by neuromodulation. For the fabrication of a new active flexible microelectrode array, we developed a process that allows the embedding of an array of small CMOS dies into a polymer foil. The process includes a transfer printing process based on adhesion, transferring the desired of the separated dies from UV-curable dicing tape to a substrate coated with sugar solution. The transfer printing process has shown to be highly reliable and selective, yielding a transfer success rate of 100% in most cases. The relative position of the transferred dies is conserved to less than $15~\mu \text{m}$ lateral displacement. To evaluate the process, the pull-off strength of the employed silicone stamps was measured. For stamps made of soft silicone, a pulling strength up to 83 kPa was obtained. In addition to this, a process for the embedding of the dies into a flexible foil system is presented. Using polydimethylsiloxane, the topography due to the dies’ height is reduced from more than $200~\mu \text{m}$ to approximately $10~\mu \text{m}$ , enabling the use of standard microelectromechanical fabrication processes on top.

Einsatz von Videos im Studiengangmarketing: eine empirische Untersuchung

Abstract: Beim Studiengangmarketing geht es um die Gewinnung geeigneter Studierender durch die Hochschule. Das in den letzten Jahren vielfaltiger gewordene Angebot an Studiengangen und hohe Abbruchquoten, insbesondere im MINT-Bereich, erhohen die Bedeutung des Studiengangmarketings mit dem Ziel, nicht nur die Bewerberanzahl hoch zu halten oder zu erhohen, sondern auch die geeigneten Studierenden zu finden. Das Konsumverhalten der Zielgruppe junger Studieninteressierter zeigt die hohe Bedeutung von multimedialen Elementen im Internet, insbesondere von Videos. Daher sollten Hochschulen (auch) verstarkt Videos nutzen, um die relevanten Informationen zu ihren Studiengangen zu vermitteln. Die vorliegende empirische Untersuchung dokumentiert und analysiert erstmalig den tatsachlichen Einsatz von Videos beim Studiengangmarketing. Universitaten und Hochschulen fur Angewandte Wissenschaften (HAW) setzen Videos bereits in vielfaltigen Formen ein, wobei Statementvideos und Erklarvideos verbreitet sind. Die Videos werden meist langerfristig eingesetzt. Die Analysen zeigen aber auch, dass beim Einsatz von Videos und im Studiengangmarketing weiterhin Verbesserungsbedarf besteht, was zu Handlungsempfehlungen fuhrt.

Rigid ℵ 1 -Free Abelian Groups with Prescribed Factors and Their Role in the Theory of Cellular Covers

Abstract: In Rodriguez and Strungmann (J. Algebra Appl. 14, 2016) Rodriguez and the second author gave a new method to construct cellular exact sequences of abelian groups with prescribed torsion-free kernels and co-kernels. In particular, the method was applied to the class of \(\aleph _{1}\)-free abelian groups in order to complement results from Rodriguez–Strungmann (Mediterr. J. Math. 6:139–150, 2010) and Gobel–Rodriguez–Strungmann (Fundam. Math. 217:211–231, 2012). However, \(\aleph _{1}\)-free abelian groups G with trivial dual but \(\mathop{\mathrm{Hom}} olimits (G,R) eq \{0\}\) for all rational groups \(R \subseteq \mathbb{Q}\) not isomorphic to \(\mathbb{Z}\) had to be excluded. Here we give two constructions of such groups, e.g., using Shelah’s Black Box prediction principle.

Problems with Tribological Testings of Marketable Oils Using Laboratory Model Test Rigs

Abstract: Abstract An important point in Tribology is mechanical-dynamic testing of lubricants and materials under stress and the interpretation of the results obtained therefrom. Widely-used test methods are often applied to test the performance of lubricants e.g. test results determined by tribometers should be treated carefully when using marketable oils. A closer evaluation of these results is part of this research paper. Within this study, several marketable oils were used and experimentally investigated. These were a gear oil, two engine oils, one hydraulic oil, one metal working fluid and one forming oil. There were several distinct differences. On the one hand, the used oils differ significantly in terms of their performance in the individual test methods. This is not surprising but has a clear reason in the different compositions of the lubricants resulting from their respective application. By subjecting these oils to diverse test methods with different test equipment, the results can vary widely and result in completely dissimilar results from the tests. Thus, a metalworking oil appears excellently when determining the welding force in the four-ball apparatus. In the high frequency liear oscillation tester, on the other hand, barely usable results are generated. Thus, there are two contradictory statements that should be the same.