Refine
Year of publication
Institute
- Fachbereich Medizintechnik und Technomathematik (1936)
- Fachbereich Elektrotechnik und Informationstechnik (1150)
- Fachbereich Wirtschaftswissenschaften (1121)
- Fachbereich Energietechnik (1067)
- Fachbereich Chemie und Biotechnologie (898)
- Fachbereich Maschinenbau und Mechatronik (813)
- Fachbereich Luft- und Raumfahrttechnik (769)
- Fachbereich Bauingenieurwesen (664)
- IfB - Institut für Bioengineering (629)
- INB - Institut für Nano- und Biotechnologien (586)
Has Fulltext
- no (9335) (remove)
Language
Document Type
- Article (5534)
- Conference Proceeding (1422)
- Book (1062)
- Part of a Book (567)
- Patent (177)
- Bachelor Thesis (169)
- Report (83)
- Doctoral Thesis (82)
- Conference: Meeting Abstract (76)
- Other (67)
- Contribution to a Periodical (20)
- Master's Thesis (18)
- Review (18)
- Working Paper (13)
- Conference Poster (5)
- Habilitation (5)
- Preprint (5)
- Talk (5)
- Diploma Thesis (3)
- Part of a Periodical (2)
- Examination Thesis (1)
- Video (1)
Keywords
- Illustration (10)
- Nachhaltigkeit (10)
- Corporate Design (9)
- Erscheinungsbild (8)
- Gamification (8)
- Redesign (7)
- Animation (6)
- Datenschutz (6)
- Deutschland (6)
- Digitalisierung (6)
Dual frequency magnetic excitation of magnetic nanoparticles (MNP) enables enhanced biosensing applications. This was studied from an experimental and theoretical perspective: nonlinear sum-frequency components of MNP exposed to dual-frequency magnetic excitation were measured as a function of static magnetic offset field. The Langevin model in thermodynamic equilibrium was fitted to the experimental data to derive parameters of the lognormal core size distribution. These parameters were subsequently used as inputs for micromagnetic Monte-Carlo (MC)-simulations. From the hysteresis loops obtained from MC-simulations, sum-frequency components were numerically demodulated and compared with both experiment and Langevin model predictions. From the latter, we derived that approximately 90% of the frequency mixing magnetic response signal is generated by the largest 10% of MNP. We therefore suggest that small particles do not contribute to the frequency mixing signal, which is supported by MC-simulation results. Both theoretical approaches describe the experimental signal shapes well, but with notable differences between experiment and micromagnetic simulations. These deviations could result from Brownian relaxations which are, albeit experimentally inhibited, included in MC-simulation, or (yet unconsidered) cluster-effects of MNP, or inaccurately derived input for MC-simulations, because the largest particles dominate the experimental signal but concurrently do not fulfill the precondition of thermodynamic equilibrium required by Langevin theory.
Der vorliegende Beitrag stellt den seismischen Nachweis von Mauerwerksbauten in Deutschland auf Grundlage der DIN EN 1998‐1/NA vor, wobei auch die wesentlichen Änderungen zu der Norm DIN 4149 vergleichend erläutert werden. Vorgestellt werden die Definition der Erdbebeneinwirkung, das seismische Verhalten von Mauerwerksbauten und die Erläuterung der Rechenverfahren. Darauf aufbauend wird die Anwendung an drei Praxisbeispielen demonstriert.