As internet technology develops, we transfer more and more physical activities into cyberspace. On the other hand, mobile technology frees the location of cyberspace participants, and therefore, the situation and context of an avatar come back to the physical space which not only plays a role of computing interface but also provides physical social interaction and contextual experience. The emerging of locative media in urban space focuses on placing media at a location and in advance, it is often designed, planned, discussed, experienced, and modified forward and backward. Due to the complicated and time-consuming procedure of locative media planning, this paper proposes a collaborative workspace to support tangible, participative, and collaborative design by linking physical location and workspace simultaneously.

2. Introduction Cooperative discussion Field work Locative media experiencing

3. Locative Media Design Procedure Locative media design procedure

4. System Architecture HP iPAQ H6300 LOLUX GPSlim 236 MXR Toolkit Web server

5. 3D Collaborative Workspace Special Makers(media) in Relative Locations Physical Model proportioned to real scale

6. Control Block > Locative Maker choose delete play location

7. Operation Method

8. Selecting Different Media

9. Scenarios PDA interface Collect authentic data

10. Physical Space Interface Playing interface Choose the music

11. Bidirectional Connection Notify immediately Changing locative music

12. Bidirectional Connection Status Changed notice at once Changing locative music

13. Research Evaluation (Questionnaire Survey afterward) Graduate students in Ming Chuan Not Ming Chuan students 1 2 Between-subject experiment

14. Arrange 8 Location Media Campus Map Our System Mission 1 Mission 2

15. Statistic Analysis 1 (familiar with location) 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

16. Statistic Analysis 2 (strangers) 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

17. Our system helps (familiar with location) Q1: The setup helps the task. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

18. Our system helps. (strangers) Q1: The setup helps the task. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

19. Our system encourages lab discussion. (familiar with location) Q3: During the task, we discuss locative music in lab. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

20. Our system encourages lab discussion. (strangers) Q3: During the task, we discuss locative music in lab. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

21. Our system reduces discussion time at location. (very significant with familiar ones) Q4: During tdiscuss he task, we go to the location and its locative music together. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

22. Our system reduces discussion time at location. (not so significant as familiar ones) Q4: During tdiscuss he task, we go to the location and its locative music together. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

23. Familiar ones are confident and need no more tools. Q5: In addition to the setup, we need more tools to finish the task. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

24. With our system, strangers feel that they need more help. (with map, strangers are much confident) Q5: In addition to the setup, we need more tools to finish the task. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

25. Familiar ones feel less time pressure with our system. Q6: The task time is very tight. 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

26. Strangers also feel less time pressure with our system. Q6: The task time is very tight 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

27. Familiar ones feel no difference about the locative music satisfaction Q6: I am satisfied with the planned music listened at the authentic location 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

28. Strangers feel more satisfied about locative music with our system. Q6: I am satisfied with the planned music listened at the authentic location 1 2 3 4 5 6 7 Question 6 5 4 3 2 1 0 Satisfaction

29. Conclusion We integrating two research paradigms, a collaborative workspace connected with mobile users in physical space successfully. 1 Our work provides global and in situ viewpoint on a collaborative platform such that designers and participants can cooperate in virtual space and physical space. 2 In our preliminary observation, scale model (lab method) and mobile devices (field work) can facilitate designing locative media. 3

30. Conclusion Strangers love and need our system to plan and experience locative media. 4 Average task time is shorter. Experience of locative music is better. 5 Designing tools for locative media planning, needs to regard the user whether s/he is familiar with the site. 6

32. Questionnaire