The Covid-19 pandemic triggered governments and designers to revalue and redesign public spaces. This paper focuses on the various design responses to Covid-19 proposed and implemented in public spaces. In particular, we identify the kinds of challenges that such design responses address and the strategies that they use. We selected 56 design examples, largely collected from internet sources. By analyzing the design examples we identified five Covid-related challenges that were addressed in public space: sustaining amenities, keeping a distance, feeling connected, staying mentally healthy, and expanding health infrastructures. For each challenge, we articulated 2 to 6 design strategies. The challenges highlight the potential of public space to contribute to more resilient cities during times of pandemic, also in the future. The design strategies show the possible ways in which this potential can be fulfilled. In our next steps, we will use our findings to develop a program of possibilities; this program will contain a wide range of design strategies for responding to future pandemics and will be made publically accessible in an online database. The program contributes to more resilient post-Covid cities, by offering a variety of possibilities for coping with, and adapting to, pandemic-related shocks and stressors.
MULTIFILE
This study explores the shape-morphing behavior of 4D-printed structures made from Polylactic Acid (PLA), a prominent bio-sourced shape-memory polymer. Focusing on the response of these structures to thermal stimuli, this research investigates how various printing parameters influence their morphing capabilities. The experimental approach integrates design and slicing, printing using fused deposition modeling (FDM), and a post-printing activation phase in a controlled laboratory environment. This process aims to replicate the external stimuli that induce shape morphing, highlighting the dynamic potential of 4D printing. Utilizing Taguchi’s Design of Experiments (DoE), this study examines the effects of printing speed, layer height, layer width, nozzle temperature, bed temperature, and activation temperature on the morphing behavior. The analysis includes precise measurements of deformation parameters, providing a comprehensive understanding of the morphing process. Regression models demonstrate strong correlations with observed data, suggesting their effectiveness in predicting responses based on control parameters. Additionally, finite element analysis (FEA) modeling successfully predicts the performance of these structures, validating its application as a design tool in 4D printing. This research contributes to the understanding of 4D printing dynamics and offers insights for optimizing printing processes to harness the full potential of shape-morphing materials. It sets a foundation for future research, particularly in exploring the relationship between printing parameters and the functional capabilities of 4D-printed structures.
Description of a new hand/palm-held computerized 3D force measuring system. The system is built for interface (direct) measurement of 3D manual contact force with real-time data presentation. Static calibration was performed of the 3D force sensor with variable preloads to study their effect as well of the prototype system adapted for clinical manual examination and treatment. The new system enables, for the first time, recording and presenting of 3D manual contact forces at the patient-practitioner interface. 3D direct manual contact force measures have the potential to give a more complete and differentiated characterization of patient and practitioner forces than 1D forces. Clinical validity of the prototype system will have to be investigated, and for studying specific clinical manual handling techniques, obvious limitations require further development.
