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Sulfur Diffusion Studies Imitating Recycled Ground-Rubber-Containing Compounds
No full textn-rubber properties of vulcanizates deteriorate in the presence of incorporated recycled ground rubber (GR). This behavior is partly explained by a possible diffusion of sulfur from the rubber matrix into the GR. Therefore, the sulfur concentration and, thus, the crosslink density in the matrix are reduced. This phenomenon was further investigated in this research work using two spatially resolved methods that supplement each other: the diffusion of soluble sulfur in GR-containing compounds was locally investigated via Micro X-Ray Fluorescence analysis. Viscoelastic properties were also determined spatially by the Micro Dynamic-Mechanical Indentation method. Combining the results of both methods, local concentrations of sulfur were related to local viscoelastic properties, revealing great differences in crosslink density at the interface between the GR and matrix material. In this way, it is shown that sulfur is capable of diffusing several mm, which locally doubles its concentration with respect to the sulfur content of the compound formulation. This, in turn, negatively impacts the homogeneity of crosslink density in both the matrix and GR, revealing a local increase in the elastic stiffness of 100 %. In addition, it was found that the vulcanization characteristics of the used polymers determine the amount of sulfur diffusion and, thus, the change in viscoelastic properties
„Wirtschaftshandeln braucht christliche Werte“, im Gespräch mit Ulrike Pilz-Dertwinkel, Heinrichsblatt Nr. 29 vom 14.7.2024, S. 29 [Interview]
No full text“Spiritual Intelligence in the Marketplace – Exploring Spirituality to foster Organizational Advantage”
No full text“Spiritual Intelligence in the Marketplace – Exploring Spirituality to foster Organizational Advantage”, Research Paper Presentation & Discussion together with Rainer Wehner, Jörg Meyer, Sindhu Shantha Nair, Emmanuel O. Nwosu and Bello Muhammad Abdullahi at the 12th INTERNATIONAL CONFERENCE ON CONTEMPORARY ISSUES IN MANAGEMENT (CIM24) of the International School of Management Excellence in Bangalore, India.
Abstract in CIM24 Book of Abstracts, Tamil Nadu 2024, p. 11 f
A 3D bioreactor model to study osteocyte differentiation and mechanobiology under perfusion and compressive mechanical loading
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Gesundheitliche Vorausplanung für die letzte Lebensphase: Wie sind Einrichtungen für erwachsene Menschen mit Behinderungen in Bayern hierauf vorbereitet?
No full textA constructive approach for investigating the stability of incommensurate fractional differential systems
Get PDFThis paper is devoted to studying the asymptotic behaviour of solutions to generalized noncommensurate fractional systems. To this end, we first consider fractional systems with rational orders and introduce a criterion that is necessary and sufficient to ensure the stability of such systems. Next, from the fractional-order pseudospectrum definition proposed by Sanca et al., we formulate the concept of a rational approximation for the fractional spectrum of a noncommensurate fractional systems with general, not necessarily rational, orders. Our first important new contribution is to
show the equivalence between the fractional spectrum of a noncommensurate linear system and its rational approximation. With this result in hand, we use ideas developed in our earlier work to demonstrate the stability of an equilibrium point to nonlinear systems in arbitrary finite-dimensional spaces. A second novel aspect of our work is the fact that the approach is constructive. Finally, we give numerical simulations to illustrate the merit of the proposed theoretical results
Quarterly on Rufugee Problems (3, 2)
Get PDFIssue 2/2024 of the Quarterly on Refugee Problems - AWR Bulletin (QRP) covers a wide range of topics. While Roßkopf introduces to the cornerstones of the newly adopted EU Pact on Migration and Asylum in the News & Notes, his editorial highlights an unfolding shift of the European reform discourse from management to prevention and further extraterritorialisation. Europe is also the scope for a review of the case-law of the CJEU and ECtHR on COVID-19 related emergency measures and their compliance or non-compliance with fundamental human rights by Friedery and Kecskés. Huth-Hildebrandt, Al'Ali and Al-Madi shed light on often neglected 'random camps' analysing educational needs and deprivation of minor Syrian refugee inhabitants in Jordan. Another situation of protracted displacement is covered by Bibi critically investigating repatriation measures taken by Pakistan against Afghan refugees to put a forceful end to it. Finally, Barbo and Jeeroburkhan review studies on programs with an aim to navigate diet and nutrition of newcomer populations from a Canadian perspective