User Interfaces for Wearable Computers (eBook)

Dr. Hendrik Witt is a senior research scientist at the Centre for Computing Technologies (TZI) at the University of Bremen (Germany). His research interests are in Human-Computer Interaction (HCI) and context recognition.

Foreword 6
Preface 8
Abstract 10
Contents 11
List of Figures 17
List of Tables 21
Chapter 1 Introduction 22
1.1 Motivation 22
1.2 Wearable User Interfaces 23
1.3 Research Question and Methodology 24
1.4 Scope and Limitation of the Thesis 26
1.5 Thesis Organization 27
Part I Theoretical Framework and Related Work 30
Chapter 2 Interdisciplinary Foundations 31
2.1 What is a Wearable Computer? 31
2.2 Research Topics of Wearable Computers 34
2.3 Contributing Research Areas 39
Chapter 3 Fundamentals of Perception and Cognition 41
3.1 Introduction 41
3.2 The Visual Stimulus 42
3.3 The Auditory Stimulus 50
3.4 Attention and Performance Limitations 53
Chapter 4 Human- Computer Interaction 56
4.1 HCI and Wearable Computers 56
4.2 Output Hardware for Wearable Computers 58
4.3 Input Hardware for Wearable Computers 67
4.4 Interruption Handling 73
4.5 User Interface Evaluation 76
Chapter 5 Context- Awareness and Adaptive User Interfaces 82
5.1 Definitions 82
5.2 Design and Architecture Principles 83
5.3 Enabling Tool Support Systems 89
5.4 Summary 91
Part II Design and Development of Wearable User Interfaces 92
Chapter 6 An Approach for Developing Wearable User Interfaces 93
6.1 User Interface Design and Development 93
6.2 Wearable User Interface Development Process 96
6.3 Conclusion 104
Part III Evaluation of Wearable User Interfaces 106
Chapter 7 The HotWire Apparatus 107
7.1 Introduction 107
7.2 The HotWire Primary Task Simulator 108
7.3 Modeling Primary Tasks with the HotWire 113
7.4 Apparatus Enhancements 118
7.5 Conclusion 120
Chapter 8 Interruption Methods for Gesture Interaction 121
8.1 Introduction 121
8.2 Hypotheses 122
8.3 Experiment 122
8.4 User Study 126
8.5 Results 129
8.6 Evaluation of the HotWire Apparatus 136
8.7 Conclusion 138
Chapter 9 Interruption Methods for Speech Interaction 141
9.1 Introduction 141
9.2 Hypotheses 142
9.3 Experiment 142
9.4 User Study 145
9.5 Results 148
9.6 Qualitative Results 157
9.7 Conclusion 160
Chapter 10 Visual Feedback and Frames of Reference for Gesture Interaction 163
10.1 Introduction 163
10.2 Hypotheses 164
10.3 User Feedback 164
10.4 Different Frames of Reference and Gestures 166
10.5 Experiment 167
10.6 User Study 173
10.7 Results 174
10.8 Discussion 182
10.9 Conclusion 185
Part IV Development of Wearable User Interface 187
Chapter 11 The Wearable User Interface Toolkit 188
11.1 Basic Requirements 188
11.2 Intended Use of the Toolkit 189
11.3 Overview of the Software Architecture 191
11.4 Core Framework 193
11.5 Abstract User Interface Description Layer 200
11.6 Interface Rendering 208
11.7 Interface Adaptation System 216
11.8 Conclusion 220
Chapter 12 Applications 222
12.1 KATO Aircraft Maintenance Assistant 222
12.2 Assembly Line Trainer for Car Production 225
12.3 Aircraft Disassembly Assistant 228
12.4 Conclusion 231
Part V Conclusion 233
Chapter 13 Conclusions and Final Remarks 234
13.1 Contributions 235
13.2 Future Work 236
Bibliography 240
Appendix 268
Appendix A User Studies 269
A.1 Questionnaires 269
Appendix B WUI- Toolkit 277
B.1 User Interface Screenshots 277
B.2 Abstract User Interface Description Layer 280
B.3 WUI-Toolkit Con.guration 280