Mobile sensors and context-aware computing / Manish J. Gajjar.

Includes index.

Online resource; title from PDF title page (ScienceDirect, viewed March 3, 2017).

Front Cover; Mobile Sensors and Context-Aware Computing; Copyright Page; Dedication; Contents; Preface; Acknowledgments; 1 Introduction; Definition of Mobile Computing; Constraints and the Challenges Faced by Mobile Computing Systems; Resource Poor; Less Secured/Reliable; Intermittent Connectivity; Energy Constrained; Historical Perspectives and the Influences of Market; Enhanced User Experience; Improved Technology; New Form Factors; Increased Connectivity/Computing Options; Market Trends and Growth Areas; New Sensor Technology and Products; Sensor Fusion; New Application Areas; References.

2 Context-aware computingContext-Aware Computing; Levels of Interactions for Context-Aware Infrastructure; Ubiquitous Computing; Challenges of Ubiquitous Computing; Limitations of wireless discovery; User interface adaptation; Location-aware computing; Context; Computing Context; Passive Versus Active Context; Context-Aware Applications; Location Awareness; Location Sources in Mobile Phones; GNSS (Global Navigation Satellite System); Wireless Geo; Sensors; Localization Algorithms; Angle of Arrival; Time of Arrival; Time Difference of Arrival; Received Signal Strength; References.

3 Sensors and actuatorsTerminology Overview; Sensor Ecosystem Overview; Location-Based Sensors; Accelerometer; g-Force, axes, coordinate system; Unit of measurement; Gravity contribution, device behavior resting on a surface and free fall; Case 1: Stationary car on a flat road; Case 2: Object in free fall; Case 3: Body moving downward; Tilt sensitivity and accelerometer orientation; The effect of tilt on accelerometer measurements; One-axis tilt sensing; Two-axis tilt sensing; Case 1: Sensor position: Vertical; Case 2: Sensor position: Horizontal; Three-axis tilt sensing; Gyroscopes.

Mechanical gyroscopesComponents of a gyroscope and axis of freedom; Gyroscopes precession; Proximity Sensor; Workings of a inductive proximity sensor; Workings of a capacitive proximity sensor; Workings of a photoelectric proximity sensor; Workings of a magnetic proximity sensor; Pressure Sensor; Workings of a pressure sensor; Touch Sensors; Touch sensors based on working principles; Ultrasound/surface acoustic wave touch sensors; Capacitive touch sensors; Resistive touch sensors; Biosensors; ECG working principles; Example heart rate estimation algorithm; References; 4 Sensor hubs.

Introduction to Sensor HubsDedicated Microcontroller Unit; Application Processor-Based Sensor Hub; Sensor-Based Hub With Micro Controller Unit; FPGA-Based Sensor Hub; Atmel SAM D20 Sensor Hub With Micro Controller Unit; Cortex-M0+ Processor and Its Peripherals; Device Service Unit; Power Management Unit; System Controller; Watchdog Timer; Real-Time Counter; External Interrupt Controller; Serial Communication Interface; Intel Moorefield Platform (Application Processor-Based Sensor Hub); Integrated Sensor Hub; Integrated sensor hub hardware architecture; Integrated sensor hub power management.

Includes bibliographical references and index.