约翰·开普勒林茨大学

An orthoset is a non-empty set X together with a symmetric binary relation 1 and a constant 0 such that x 1/ x for any x =/ 0, and 01 x for any x. Maps f : X-* Y and g: Y-* X between orthosets are said to form an adjoint pair if, for any x E X and y E Y, f (x) 1 y is equivalent to x 1 g(y). Hilbert spaces, equipped with the usual orthogonality relation and the zero vector, provide the motivating examples of orthosets. The usual adjoints of bounded linear maps between Hilbert spaces are adjoints also in our sense. We investigate dagger categories of orthosets and maps between them, requiring that any morphism and its dagger form an adjoint pair. We indicate conditions under which such a category is unitarily dagger equivalent to a dagger category of complex Hilbert spaces and bounded linear maps. (c) 2026 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

Quality of life, well-being and virtuousness have emerged as critical paradigms in retailing. While current research highlights how negative behaviours threats customers' well-being and shopping experiences, it largely ignores virtuous customer behaviours, specifically altruistic, positive customer deviance (PCD). Consequently, little is known about PCDs within customer-to-customer interactions and how they are associated with bystander-customers’ perceptions and affective responses. This is concerning, as retailing as a social ecosystem and its customers' behaviours shape commitment and trust. Considering that customers' bonding to retailers represent competitive advantages and indirect financial success parameters across all sectors, it is important to understand how positive behaviours among customers unfold and how they relate to their commitment and trust to retailers. To close these gaps, we draw on Lewin's life field theory to explain the interplay of external and internal forces that are associated with commitment and trust in consideration of PCD perceptions. To reveal the boundary conditions of PCDs' effects we consider differential susceptibility theory and social production function theory which account for customers' variances in perceiving PCDs on the basis for their attitudes and their effectiveness. Using structural equation modelling with a sample of 1008 bystander-customers, the findings indicate that perceived PCD is positively associated with focal customer outcomes and that these associations vary according to shopping-experience-related conditions and perceived shopping effectiveness. We contribute to current research as we unravel PCD dimensions and its impact. We complement theory and practice by revealing the potential of PCD perceptions for customer well-being and enjoyment, suggesting it as a relevant social stimulus for building trust and commitment in increasingly competitive markets.

We develop a new implementation of the Continuum Particle Method (CPM) introduced by Verma and Padding (2020), a novel approach to multiphase particle-in-cell (MP-PIC) simulations, based on a face interpolation method that aims to improve robustness and accuracy. We present a comprehensive comparison of CPM, MP-PIC, and computational fluid dynamics coupled with the discrete element method (CFD-DEM) against experimental data from the literature for fluidized and spout-fluidized systems. We evaluate the methods using two drag models and show that CPM agrees better with both experiments and CFD-DEM. We demonstrate that the unsatisfactory performance of MP-PIC does not primarily arise from the selected drag model. Instead, it results from the simplified particle stress model, which depends only on the local particle volume fraction. This model accounts only for isotropic particle pressure and neglects viscous and frictional particle stresses, thereby missing key resistance mechanisms associated with shear and elongational deformation in dense particle regions. We also examine the role of smoothing in CPM by varying the characteristic smoothing length applied to particle fields. We show that smoothing strongly affects the predicted flow behavior and that the optimal level of smoothing depends on the operating flow regime. Finally, we assess particle mixing and find that CPM predicts faster mixing than CFD-DEM under the investigated conditions. Overall, we show that CPM offers a promising and computationally efficient alternative for simulating dense gas-solid flows while retaining improved agreement with benchmark numerical and results.

This article introduces the SETER framework, a conceptual tool for analyzing the interplay between socio-ecological transformation (SET) and economic reasoning (ER). In the context of global crises and the contested nature of sustainability discourses, the framework identifies nine key categories (economic goals, decisive economic institutions, role of the state, spatial scope, role of technology, economy-nature-nexus, socioeconomic cohesion, transformative dynamic, and transformative agency) to systematically compare diverse SET narratives and their basic underlying economic imaginaries. Drawing on insights from social studies of economics (SSE) and different strands of SET literature, the framework highlights how ER shapes SET discourses and potential pathways, influencing both diagnoses of socioecological crises and proposed solutions. The SETER framework also enables typifying antagonistic narratives opposing SET, such as techno-libertarianism or fossil modernization. While the framework offers a useful tool for categorizing and comparing SET narratives, integrating it with power-focused analytical tools is necessary to assess the performative influence of these narratives. By offering a flexible, cross-sectoral, and longitudinal approach, the SETER framework provides a robust methodology for navigating the complexities of SET-related discourses, current counter-developments, and the critical role of economic imaginaries.

This paper explores how municipal utilities (MUs) in Austria and Germany adopt and integrate the United Nations’ Sustainable Development Goals (SDGs) into their strategies, strategic projects and management controls (MCs). MUs have a long tradition of delivering public infrastructure services, such as energy, water, and public transport, in the two focus countries. As important municipal enterprises, MUs must position themselves on a continuum between their public mission and their business orientation, and therefore act in a financially sustainable manner. Taking SDG adoption seriously is in line with the public mission orientation. Drawing on legitimacy theory, the study investigates whether MUs engage with the SDGs symbolically or substantively. The research is based on nineteen semi-structured interviews conducted with representatives from sixteen MUs, allowing for an in-depth qualitative analysis of strategic alignment, project implementation, and related MCs. The findings reveal considerable variation in SDG integration, showing that most MUs are still in an early, emerging stage of adoption, which is still at a symbolic level. By providing empirical insights from two countries with long-standing traditions of municipal service provision by local government-owned public utilities, the study contributes to the limited literature on SDG adoption in municipal enterprises and enhances understanding of the legitimacy dynamics shaping SDG practices in local state-owned entities.