Publikationsserver der Fachhochschule Potsdam
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2719 research outputs found
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Wissenschaftskommunikation und Gender
No full textWie prägt Geschlecht die mediale Darstellung von Wissenschaftler*innen in klassischen und digitalen Medien? Mit etablierten und innovativen Methoden analysieren die Beiträger*innen strukturelle Barrieren sowie stereotype Narrative und decken neue Chancen der Sichtbarkeit auf. Dabei rücken sie Prozesse der Wissenschaftskommunikation im gesellschaftlichen Dialog in den Fokus und verbinden theoretische Analysen mit Praxisbeispielen und Handlungsempfehlungen für die strategische Gestaltung von Sichtbarkeit – ein interdisziplinärer Überblick für alle, die sich mit neuen Methoden für eine gerechtere Wissenschaftskommunikation auseinandersetzen
Micromechanical analysis of the cyclic mechanical response of granular materials through DEM simulations
No full textIn this study, we investigate with the Discrete Element Method (DEM) the mechanical behavior of a cohesionless granular material under undrained true triaxial conditions, considering both monotonic and cyclic loading. We link the microstructure evolution within the granular assembly to its macroscopic cyclic response. To capture the mechanical response of our reference material (Karlsruhe fine sand), a rolling resistance linear contact model along with spherical particles is calibrated through a trial-and-error process, adjusting the model parameters to capture the experimentally observed behavior as close as possible. A series of cyclic undrained triaxial tests were simulated to investigate the micromechanical processes underlying liquefaction of sand under cyclic shearing. We analyzed the evolution of various fabric indices, including the redundancy index, contact normal orientations, and fabric anisotropy in relation to the pre- and post-liquefaction responses. The results reveal that a redundancy index below unity provides a unified criterion for the loss of the isostatic condition within the granular assembly, which triggers the onset of liquefaction. Throughout the cyclic loading process, sliding-dominant contact-yielding mechanisms remain prevalent. Additionally, significant changes in contact normal orientation and increasing fabric anisotropy dependent on the induced axial strain occur as the sample undergoes post-liquefaction deformation
Composite dowels: Steel part of the shear connection. New design guidelines CEN/TS 1994-1-102, experience in the field of manufacturing technology and new structures
No full textIntroduced to construction about 20 years ago, the composite dowels shear connection is now used more and more widely in engineering, mostly in bridge construction. During this time, production and construction technologies were refined, design guidelines were developed, and finally a new Technical Specification CEN/TS 1994-1-102 was established. This paper summarizes the experience and design principles related to the steel part of the connection, focusing on the latest achievements in recent years: technology of production, solutions and design approach
Governing phygital spaces: Human rights by design meets speculative design
No full textSmart glasses and AI-powered “phygital spaces” are transforming how people perceive, navigate, and interact with the world. Yet existing regulatory frameworks - Privacy by design and Human Rights by design - focus narrowly on data protection and overlook the relational and collective dynamics these technologies disrupt. This article introduces the ‘ethics of interactions’ as a complementary framework that situates regulation within the lived realities of AI-mediated environments. Our interdisciplinary team, combining law, speculative design, and human–computer interaction, developed a year-long methodology spanning speculative storytelling, legal mapping, field diaries, and role-play based workshops in Germany and Israel. These exercises revealed how smart glasses might reshape trust, consent and perception, through five recurring modes of interaction: person-to-person, person-to-space, person-to-reality, person-to-machine, and person-to-platform. Workshop role-play surfaced vulnerabilities that conventional legal analysis misses, from peer-to-peer surveillance and emotional inference to corporate, platform and government control of augmented realities. Building on these findings, we propose regulatory recommendations that combine dual governance models, interaction-sensitive safeguards, and investment in digital literacy for policymakers. By embedding speculative inquiry into policy design, this study closes the loop between abstract principles and lived dilemmas, offering both conceptual and practical pathways for governing phygital spaces
Real-Time 3D Heatmap Visualization and Collaborative Gaze Analysis in XR Environments
No full textThis paper introduces FocusMetrics XR, a system designed to enhance collaborative analysis in XR environments using three-dimensional gaze visualization. By aggregating users’ fixation data into real-time 3D heatmaps on virtual objects, the system highlights shared areas of attention, improving coordination and mutual understanding during collaborative tasks. FocusMetrics XR integrates the Mixed Reality Toolkit (MRTK) with Photon Unity Networking (PUN) to enable real-time synchronization, ensuring efficient performance in resource-constrained XR settings. A lightweight rendering algorithm is used to visualize fixation-based heatmaps on complex 3D geometries, while an interactive cube tool allows users to focus on specific areas, optimizing computational efficiency and reducing unnecessary tracking. The system is demonstrated through a medical use case involving a 3D heart model. Initial evaluations suggest that 3D heatmaps improve data interpretation and collaboration, leading to faster and more accurate task completion compared to traditional methods. Users particularly appreciated the gaze-sharing feature, which helped align focus during group activities. Applications extend beyond medical diagnostics to education, collaborative design, and environmental monitoring. Future work will explore scalability in larger teams and dynamic environments, supporting more complex multi-user interactions
Life Cycle Assessment for Urban Planning
No full textLife cycle assessments (LCAs) in the construction sector often analyse buildings or their individual components. Applying LCA to determine the environmental impact of entire settlements is less established and the structural infrastructure is often not taken into account. The research project ‘Q-LCA - Analysis of the ecological impacts of different settlement types in new urban development projects over their life cycle’ follows the objective of determining and comparing the material flows, energy consumption including grey energy and the associated emissions of urban settlement components with a focus on global warming potential (GWP). Based on a modular approach, the GWP for 972 different settlement scenarios was determined through an LCA-based model in which six key parameters - building type, settlement density, road layout, building construction method, energy efficiency level and heating system - were systematically combined. The study demonstrates how modularity enables the assessment of large-scale systems such as urban settlements, contributing to an enhanced reflection of their inherent heterogeneity. Besides quantifying the infrastructure share of settlements’ GWP, further results indicate a high influence of operational energy consumption as well as choice of construction method on the area-based GWP. Underground garages are moreover responsible for high GWPs in densified settlements with large building types. This research fills a critical gap in existing literature by emphasising the potential of modular LCA approaches to assess urban development and additionally provides valuable insights for urban planners as well as policy makers seeking to lower environmental impact, identify circularity potentials and mitigate climate change effects in settlements
