We contribute MIDAS as a novel sensing solution for characterizing everyday objects using thermal dissipation. MIDAS takes advantage of the fact that anytime a person touches an object, it results in heat transfer. By capturing and modeling the dissipation of the transferred heat, e.g., through the decrease in the captured thermal radiation, MIDAS can characterize the object and determine its material. We validate MIDAS through extensive empirical benchmarks and demonstrate that MIDAS offers an innovative sensing modality that can recognize a wide range of materials -with up to 83% accuracy -and generalize to variations in the people interacting with objects.

The active involvement of teenagers in the design of interactive technologies for museums is lacking further development. Adopting a userdriven innovation framework along with cooperative inquiry, we report and discuss a case study that has been designed to involve users in the ideation of interpretive experiences for a local museum. Working in collaboration with the Natural History Museum of Funchal, this contribution will present and discuss co-design sessions that were aimed at participants with ages 15 to 17 and where they were asked to ideate an interactive museum experience. As a result of the co-design sessions, we have found several design patterns. We have grouped these patterns into four categories that express the interests of a teenage audience; these categories are: "interactions", "gaming", "localization" and "social media". Our findings suggest that teenagers value interactive technologies when visiting museums and that user-driven innovation plays an important role when involving this specific audience in the design of user experiences for museums.

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