TY - JOUR A1 - Vogel, Sven A1 - Wölfer, Christian A1 - Ramirez-Diaz, Diego A1 - Flassig, Robert A1 - Sundmacher, Kai A1 - Schwille, Petra T1 - Symmetry Breaking and Emergence of Directional Flows in Minimal Actomyosin Cortices JF - Cells N2 - Cortical actomyosin flows, among other mechanisms, scale up spontaneous symmetry breaking and thus play pivotal roles in cell differentiation, division, and motility. According to many model systems, myosin motor-induced local contractions of initially isotropic actomyosin cortices are nucleation points for generating cortical flows. However, the positive feedback mechanisms by which spontaneous contractions can be amplified towards large-scale directed flows remain mostly speculative. To investigate such a process on spherical surfaces, we reconstituted and confined initially isotropic minimal actomyosin cortices to the interfaces of emulsion droplets. The presence of ATP leads to myosin-induced local contractions that self-organize and amplify into directed large-scale actomyosin flows. By combining our experiments with theory, we found that the feedback mechanism leading to a coordinated directional motion of actomyosin clusters can be described as asymmetric cluster vibrations, caused by intrinsic non-isotropic ATP consumption with spatial confinement. We identified fingerprints of vibrational states as the basis of directed motions by tracking individual actomyosin clusters. These vibrations may represent a generic key driver of directed actomyosin flows under spatial confinement in vitro and in living systems. Y1 - 2020 UR - https://www.mdpi.com/2073-4409/9/6/1432 U6 - https://doi.org/10.3390/cells9061432 SP - 1 EP - 10 PB - MDPI ER - TY - JOUR A1 - Kant, Daniel A1 - Creutzburg, Reiner A1 - Johannsen, Andreas T1 - Investigation of risks for Critical Infrastructures due to the exposure of SCADA systems and industrial controls on the Internet based on the search engine Shodan JF - IS and T International Symposium on Electronic Imaging Science and Technology KW - Industrial Control System KW - ICS KW - critical infrastructure KW - energy supply KW - Shodan KW - human machine interface KW - industrial protocols KW - remote control protocols KW - remote maintenance protocols Y1 - 2020 U6 - https://doi.org/10.2352/ISSN.2470-1173.2020.3.MOBMU-253 SN - 2470-1173 SP - 253-1 EP - 253-16 PB - Society for Imaging Science and Technology (IS&T) CY - Springfield, VA ER - TY - JOUR A1 - Johannsen, Andreas A1 - Kant, Daniel A1 - Creutzburg, Reiner T1 - Measuring IT security, compliance and data governance within small and medium-sized IT enterprises JF - IS and T International Symposium on Electronic Imaging Science and Technology KW - IT security KW - compliance KW - data sovereignty KW - data governance KW - security awareness KW - IT security readiness KW - data protection KW - mobile security KW - small and medium-sized IT enterprises Y1 - 2020 U6 - https://doi.org/10.2352/ISSN.2470-1173.2020.3.MOBMU-252 SN - 2470-1173 SP - 252-1 EP - 252-11 PB - Society for Imaging Science and Technology (IS&T) CY - Springfield, VA ER - TY - JOUR A1 - Mukhin, Nikolay A1 - Sokolova, Irina A1 - Chigirev, Dmitry A1 - Rudaja, Lyudmila A1 - Lebedeva, Galina A1 - Kastro, Rene A1 - Bol’shakov, Maxim A1 - Schmidt, Marc-Peter A1 - Hirsch, Sören T1 - Composite Ferroelectric Coatings Based on a Heat-Resistant Polybenzoxazole Polymer Matrix JF - Coatings KW - lead zirconate titanate KW - poly(o-hydroxy amide) KW - 4,4-(hexafluoroisopropylidene) dianiline KW - 5,5-methylene bis(2-aminophenol) KW - poly(o-hydroxyamide) KW - composite ferroelectric coatings KW - thermal stability of dielectric properties Y1 - 2020 U6 - https://doi.org/10.3390/coatings10030286 VL - 10 IS - 3 SP - 286 PB - MDPI ER - TY - JOUR A1 - Johannsen, Andreas A1 - Kant, Daniel T1 - IT-Governance, Risiko- und Compliance-Management (IT‑GRC) – Ein Kompetenz-orientierter Ansatz für KMU JF - HMD Praxis der Wirtschaftsinformatik KW - IT-Governance KW - IT-Risikomanagement KW - IT-Compliance KW - Security Awareness KW - IT-GRC Reifegrad KW - KMU Y1 - 2020 U6 - https://doi.org/10.1365/s40702-020-00625-8 PB - Springer CY - Wiesbaden ER -