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Using the wooden church of Södra Råda as a case study, this article concerns new applications of technology to contextualise and activate archive material in situ at places of cultural significance. Using a combination of augmented reality and virtual reality, we describe a process of turning historical photographs and two-dimensional reconstruction drawings into three-dimensional virtual models that can be lined up to a physical space. The leading questions for our investigation concern how archive material can be contextualised, and how the result may be made accessible in situ and contribute to place development. The result of this research suggests possibilities for using historical photographs to faithfully reconstruct lost historical spaces as three-dimensional surfaces that contextualise documentation and offer spatial information.

Purpose: Augmented reality overlay systems can be used to project a CT image directly onto a patient during procedures. They have been actively trialed for computer-guided procedures, however they have not become commonplace in practice due to restrictions of previous systems. Previous systems have not been handheld, and have had complicated calibration procedures. We put forward a handheld tablet-based system for assisting with needle interventions. Methods: The system consists of a tablet display and a 3-D printed reusable and customizable frame. A simple and accurate calibration method was designed to align the patient to the projected image. The entire system is tracked via camera, with respect to the patient, and the projected image is updated in real time as the system is moved around the region of interest. Results: The resulting system allowed for 0.99mm mean position error in the plane of the image, and a mean position error of 0.61mm out of the plane of the image. This accuracy was thought to be clinically acceptable for tool using computer-guidance in several procedures that involve musculoskeletal needle placements. Conclusion: Our calibration method was developed and tested using the designed handheld system. Our results illustrate the potential for the use of augmented reality handheld systems in computer-guided needle procedures.

This article deals with mobile technologies as tools for learning within museums. Using the presentation of EGO-TRAP – an exhibition which uses mo- bile technologies as the technical platform for creating an Augmented Reality – as my point of departure, I will discuss the advantages of using mobiles as tools for learning in museums. EGO-TRAP may be seen as a first modest step into a new museum paradigm. On the basis of a brief outline of the change of paradigms within museums I propose a new paradigm based on interactivity, narration and virtuality embedded in an Augmented Reality with an educational aim. This kind of Augmented Reality, I argue, seems to satisfy the demands of hands-on experiences, narrative structure and individual experiences, which I point out as being crucial for a beneficial learning experience at museums.