Eldorado - Repositorium der TU Dortmund
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Aktuellste Veröffentlichungen
Item type:Item, How does corporate culture affect IPO price formation?(2024-03-25) Cumming, Douglas; Köchling, Gerrit; Neukirchen, Daniel; Posch, Peter N.We examine the relationship between corporate culture and initial public offering (IPO) price formation. Using a sample of 935 US IPOs and data on corporate culture from Li et al. (2021b), we find that IPOs of strong culture firms are associated with more positive price revisions and higher initial returns, i.e., more underpricing. These findings hold using an alternative measure of corporate culture, matched samples, and a large set of control variables. Consistent with key theories, the effects appear to be driven by underwriters deliberately compensating investors for revealing information about their perceptions of the firm's culture during bookbuilding.Item type:Item, Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 7/2026(Technische Universität Dortmund, 2026-03-17)Item type:Item, Reshaping anisotropic behavior in metallic sheets under complex stress states: symmetric and asymmetric polynomial models with advanced convexity analysis approach(2025-07-16) Ren, Yanqiang; Du, Kai; Hou, Yong; Song, Liying; Sun, Liang; Yang, Yanfeng; Zheng, Wentao; Yuan, XiaoguangFourth-order polynomial-related analytical symmetric and asymmetric anisotropic yield criteria under the non-associated flow rule, are proposed to cover a wider range of stress states. The new model can be directly calibrated using selected experimental data. Additionally, a modified geometry-inspired numerical convexity proof method is developed to demonstrate that the proposed model satisfies the convexity condition. Compared the newly proposed and existing advanced convexity proof methods and yield criteria, and evaluated the applicability and effectiveness of the new framework. The results indicate that the new convexity proof method provides highly accurate convexity identification, consistent with the Hessian matrix method, while maintaining the user-friendliness of the GINCA method. The new symmetric model exhibits the highest accuracy in characterizing the plastic anisotropy of DP490 and AA6016-T4 compared to other investigated yield criteria. Furthermore, the new asymmetric model effectively predicts the strength differential effect under complex stress states. Precise modeling of near-plane strain and pure shear stress states significantly enhances the characterization of stress states in tensile-tensile and tension–compression regions. Applying the anisotropic hardening concept enables continuous capture of the subsequent yielding behavior of metallic sheets.Item type:Item, Pathways to adjust partial safety factors for the design of steel-reinforced concrete structures(2026-01-27) Feiri, Tânia; Lux, Til; Wiens, Udo; Ricker, MarcusAnnex A of EN 1992-1-1:2023—recently revised and amended in the context of the Second Generation of Eurocodes—introduces a method to adjust partial safety factors for the resistance side alongside a set of factors for different conditions and design situations, both for new and existing structures. The method proposed in Annex A is complemented by a set of stochastic models for relevant basic variables and forms a rather simple and objective format to adjust the partial safety factors from the default values offered in EN 1990:2023. Yet, over the last few years, advanced reliability-based methods aligned with modern computational tools have proved to enable rather robust and efficient structural reliability assessments. A thorough comparative analysis is imperative to understand how distinct reliability-based methods can be applied to adjust partial safety factors in the design of new structural components composed of steel-reinforced concrete. This analysis sheds light on the use of different methods to derive partial safety factors for the resolution of common engineering problems and offers inferences regarding possible implications in terms of safety and economic efficiency of design solutions.Item type:Item, Jahrbuch 2024(2025-07)