Zweitveröffentlichungen (grüner Weg)
Dauerhafte URI für die Sammlung
Suchen
Auflistung Zweitveröffentlichungen (grüner Weg) nach Auflistung nach Typ "article"
Gerade angezeigt 1 - 20 von 656
Treffer pro Seite
Sortieroptionen
Item 3D Impedance Modelling of Metal Anodes in Solid-State Batteries − Incompatibility of Pore Formation and Constriction Effect in Physical-Based 1D Circuit Models(2022-09-08) Eckhardt, Janis K.; Fuchs, Till; Burkhardt, Simon; Klar, Peter J.; Janek, Jürgen; Heiliger, ChristianA non-ideal contact at the electrode/solid electrolyte interface of a solid-state battery arising due to pores (voids) or inclusions results in a constriction effect that severely deteriorates the electric transport properties of the battery cell. The lack of understanding of this phenomenon hinders the optimization process of novel components, such as reversible and high-rate metal anodes. Deeper insight into the constriction phenomenon is necessary to correctly monitor interface degradation and to accelerate the successful use of metal anodes in solid-state batteries. Here, we use a 3D electric network model to study the fundamentals of the constriction effect. Our findings suggest that dynamic constriction as a non-local effect cannot be captured by conventional 1D equivalent circuit models and that its electric behavior is not ad hoc predictable. It strongly depends on the interplay of the geometry of the interface causing the constriction and the microscopic transport processes in the adjacent phases. In the presence of constriction, the contribution from the non-ideal (porous) electrode/solid electrolyte interface to the impedance spectrum may exhibit two signals that cannot be explained when the porous interface is described by a physical-based (effective medium theory) 1D equivalent circuit model. In consequence, the widespread assumption of a single interface contribution to the experimental impedance spectrum may be entirely misleading and can cause serious misinterpretation.Item Item A differential delay equation with a planar attractor(1991) Walther, Hans-OttoItem A theorem on the amplitudes of periodic solutions of delay equations, with an application to bifurcation(1978) Walther, Hans-OttoItem A uniqueness problem for a nonlinear differential delay equation(1985) Walther, Hans-OttoItem A wood-concrete nest box to study burrow-nesting petrels(2016) Bedolla-Guzmán, Yuliana; Masello, Juan F.; Aguirre-Muñoz, Alfonso; Quillfeldt, PetraItem Ableitung von Technologien(1973) Schmidt, PeterItem Item Acute stress hyporesponsive period in nestling Thin-billed prions Pachyptila belcheri(2009) Quillfeldt, Petra; Poisbleau, Maud; Chastel, Olivier; Masello, Juan F.When confronted with acute stressors, vertebrates show a highly conserved evolved sequence of physiological, hormonal and behavioural responses, including the activation of the hypothalamic-pituitary-adrenal axis. Many young vertebrates show a stress hyporesponsive period, where they exhibit a reduced glucocorticoid response. Here, we analyzed the stress response of nestling Thin-billed prions Pachyptila belcheri and compared chicks with different previous experience with capture and handling. We found that chicks had a stress response, but baseline and peak levels were below those measured in adults. The stress response of the chicks was rapid and followed by fast recovery, such that the total amount of corticosterone released in response to handling was very much lower in chicks than adults. These results indicate that nestling Thin-billed prions exhibit a stress hyporesponsive period. This was not due to habituation, as CORT measurements at baseline and elevated levels were similar in chicks handled daily and naïve chicks. The comparison with other published studies showed that the stress response of chicks usually peaks earlier and lower than in adults, and researchers should take care to measure stress-induced levels at an appropriate sampling time.Item Additive Traits Lead to Feeding Advantage and Reproductive Isolation, Promoting Homoploid Hybrid Speciation(2019-04-26) Masello, Juan F; Quillfeldt, Petra; Sandoval-Castellanos, Edson; Alderman, Rachael; Calderón, Luciano; Cherel, Yves; Cole, Theresa L; Cuthbert, Richard J; Marin, Manuel; Massaro, Melanie; Navarro, Joan; Phillips, Richard A; Ryan, Peter G; Shepherd, Lara D; Suazo, Cristián G; Weimerskirch, Henri; Moodley, YoshanSpeciation through homoploid hybridization (HHS) is considered extremely rare in animals. This is mainly because the establishment of reproductive isolation as a product of hybridization is uncommon. Additionally, many traits are underpinned by polygeny and/or incomplete dominance, where the hybrid phenotype is an additive blend of parental characteristics. Phenotypically intermediate hybrids are usually at a fitness disadvantage compared with parental species and tend to vanish through backcrossing with parental population(s). It is therefore unknown whether the additive nature of hybrid traits in itself could lead successfully to HHS. Using a multi-marker genetic data set and a meta-analysis of diet and morphology, we investigated a potential case of HHS in the prions (Pachyptila spp.), seabirds distinguished by their bills, prey choice, and timing of breeding. Using approximate Bayesian computation, we show that the medium-billed Salvin's prion (Pachyptila salvini) could be a hybrid between the narrow-billed Antarctic prion (Pachyptila desolata) and broad-billed prion (Pachyptila vittata). Remarkably, P. salvini's intermediate bill width has given it a feeding advantage with respect to the other Pachyptila species, allowing it to consume a broader range of prey, potentially increasing its fitness. Available metadata showed that P. salvini is also intermediate in breeding phenology and, with no overlap in breeding times, it is effectively reproductively isolated from either parental species through allochrony. These results provide evidence for a case of HHS in nature, and show for the first time that additivity of divergent parental traits alone can lead directly to increased hybrid fitness and reproductive isolation.Item Agenda, Vademecum oder Dekalog? : Markus Nussbaumers Text über (Schüler-)Texte(1993) Feilke, HelmuthItem Algebraic-delay differential systems, state-dependent delay, and temporal order of reactions(2008) Walther, Hans-OttoInitial value problems for differential equations with delay.Item Das Allgemeine der Allgemeinbildung(1994) Sander, WolfgangItem Alternativschulbewegung und politische Bildung(1984) Sander, WolfgangItem Amerika als Modell : Die neue Weltordnung in historischer Perspektive(1992) Schröder, Hans-Jürgen