Between the Tag and the Screen - Arkitektur- og designhøgskolen i ...

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Between the Tag and the Screen - Arkitektur- og designhøgskolen i ...

B E T W E E N T H E T A G A N D T H E S C R E E Nthe actual prototypes produced but on the knowledge gained from producingthem.We developed four approaches to prototypes in which each was orientedtoward different aspects of designing with SR-RFID. The four prototypeapproaches were NFC hyper linking, interactive table interface, java-drivenNFC phone prototypes and platform development. Each of these prototypingapproaches may be considered a method aimed toward investigating differentaspects of SR-RFID in designing. The following offers brief descriptions ofseveral of the prototypes produced in the Touch project.NFC hyper linkingOur first set of prototypes was used to map the present attributes andlimitations of the NFC-enabled phones as they were presented to end-users.By engaging with the phones and software directly, we sought to gain awider understanding of what NFC offered at the time. Our initialexperimentation used the Nokia 6131 NFC phone, which, at the time of theexperiments, was the most current NFC-enabled model available in Europe.We used the software included on the phone to create simple examples ofNFC functionality (Figure 3.2). These examples included embeddinghyperlinks and other small data sets on the tags.The experimentation revealed that user feedback in relation to theintersection of the radio fields in NFC was only indirectly conveyed. Usersonly had an indication of being inside a field when a tag was fully read, notwhile it was being read. This was not a problem using the standard tagsprovided by Nokia, but when using tags with more storage space, whichresulted in much longer reading time, there seemed to be a great deal ofambiguity in understanding when the fields overlapped.This finding directed our attention toward the phenomenon in relation to fieldintersections and how they could be used in designing better feedback. Atthis point, it is important to note that our interest did not directly concernpotential usability problems. Rather, the problems related to understandingwhen the fields intersected helped us to uncover an area of NFC we hadpreviously overlooked.Interactive table interfaceThe second demonstrator type concerned a multi-user tabletop interface. Thedevelopment of this prototype was used to investigate two aspects of SR-RFID design. First, it allowed us to investigate SR-RFID technology outsidethe limitations imposed on us by the inbuilt software in phones. In doing so,we could explore the feel of near-field-driven interaction in optimalconditions. Second, it allowed us to investigate and design for the use ofmultiple simultaneous RFID readers and tags.54

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