SABLIER : a Tangible Interactor to Navigate through Space and Time

Title of the Paper

SABLIER: A Tangible Interactor to Navigate through Space and Time

Paper Information

• Subject Area: Cultural Heritage Presentation and Spatio-Temporal Interaction Interface Design
• Keywords: Tangible User Interface, Spatio-Temporal Navigation, Virtual Reality, Cultural Heritage, Interaction Design, Time Management, Digital Navigation, User Experience, Co-Design, Immersive Systems

Research Background and Issues

• Problems and Challenges:

  • Historians need to navigate through space and time to analyze historical events and environments, but these models are not easily applicable for public cultural experiences.
  • In cultural venues like museums, spatio-temporal navigation is often overly complex, making it difficult for visitors to interact effectively across multiple temporal and spatial scales simultaneously.
  • Interaction interface design must balance attractiveness, natural interaction methods, and technical feasibility.

• Significance of the Research:

  • Digital technology provides new ways to present historical and cultural content, enabling audiences to experience and understand history immersively.
  • Tangible User Interfaces (TUIs) are considered to enhance engagement and knowledge dissemination through intuitive physical interactions.

• Motivation and Related Work:

  • Related studies mainly focus on single temporal scales or spatial navigation, failing to balance exploration across multiple temporal scales.
  • Some cultural heritage applications already incorporate TUI designs, such as ChronoViz and TimeMachine Oulu, but they face limitations in interaction complexity, applicability across scenarios, and ease of use.
  • This study aims to design a universal and efficient interactive device—SABLIER—using the metaphor of an hourglass to improve users' spatio-temporal navigation experience and explore its acceptability.

Solution

• Proposed Solution:

  • The design of a Tangible User Interface named SABLIER, shaped like an hourglass, integrates screen interfaces and physical manipulation to assist users in navigating multiple scales of time and space in virtual environments.

• Innovative Features:

  1. Enhances intuitiveness through the natural associative metaphor of an hourglass.
  2. Employs true multi-scale temporal division: short-term (process-related) and long-term (time landscape-related).
  3. Extends the operational methods of a physical hourglass (e.g., tilting, flipping) to include more interactions (e.g., moving, rotating, tapping).
  4. Combines desktop interaction devices with immersive systems like CAVE for sensory enhancement.

• Implementation Steps:

  1. Design Goals and Interaction Requirements:
     • Defined 11 basic navigation functions (e.g., landscape switching, speed adjustment) through workshops with 16 cultural heritage experts.
  2. Prototype Development and Evaluation:
     • Created low-fidelity hourglass-shaped prototypes and evaluated functionality usability with experts.
  3. Final Version Development:
     • Integrated electronic sensors (e.g., inertial units, LED visual feedback) to implement physical interaction methods corresponding to functions.
  4. User Experience Evaluation:
     • Designed scenario-based tasks in virtual environments, conducted usability tests with 25 users, and analyzed satisfaction, functional effectiveness, and learning curves.

Research Outcomes

• Specific Results:

  • Successfully developed an efficient interactive device, SABLIER, enabling intuitive multi-scale temporal and spatial navigation.
  • Among the 11 basic interaction functions, 7 major functions were included, such as fixed-time spatial navigation (F3), program execution (F5), and time flow rate adjustment (F1).

• Comparative Advantages over Existing Solutions:

  • SABLIER supports both temporal and spatial navigation across multiple temporal scales.
  • Combines physical and visual hourglass metaphors to enhance user intuitiveness and comprehension.
  • Highly extensible, adaptable to various cultural presentation scenarios.

• Experimental or Evaluation Results:

  • Perceived Usefulness (PU) scored an average of 76.78 out of 100, indicating that most users found the device useful for navigation in cultural heritage contexts.
  • Perceived Ease-of-Use (PEU) scored 83.00, with users generally finding the interface easy to learn and interactions clear.
  • Users widely appreciated the multi-scale temporal navigation design, though spatial navigation feedback mechanisms were slightly lacking.

• Limitations and Future Directions:

  • Spatial navigation feedback visualization needs optimization, such as adding magnifiers or dynamic location indicators.
  • The current physical design is constrained by the size and weight of electronic components, which could be improved through custom motherboard and battery designs.
  • Extensive testing in real cultural heritage institutions is still lacking, requiring further studies on the usability for different user groups (e.g., children, historians).

Conclusion

This study developed an innovative Tangible User Interface named SABLIER through a rigorous participatory design process. Its superior interactivity and high user satisfaction demonstrate its practical application potential in the field of cultural heritage presentation. Future improvements will focus on engineering design optimization and testing in real-world scenarios.