1. The Future of Data Collection Using Smart Devices George Yu, PhD CEO / Variable, Inc

2. Why do we measure? Town XTown Y So that we can all talk about the same thing

3. What is measurement accuracy and precision?

4. The Digital Revolution Temperature Sensor Analog ~100C Accuracy: +/- 5C Analog to Digital Converter 100.12567C

5. The World of Sensors is Changing Sensors Digitizers + Digital Sensors Computers Embedded Systems w/ Wifi

6. Modern Data Acquisition Sensors Digitizers Micro-controller Computer Internet

7. Internet of Things (IoT) Connected collecting Infinite data points Centralized data in the cloud

8. IoT for the masses First came the government and enterprise based IoT Nest thermostat Netatmo Weather Station NODE IoT devices are now widely available for consumers

9. Limitations of IoT High power consumption (Wifi, Cellular) Low power consumption (proprietary RF) Mostly fixed location devices

10. Mobile Centric Sensing Sensor s + 1.5 Billion smartphones in the world by end of 2013

11. Smartphone Sensors Trend of putting sensors in smartphones Accelerometer Gyroscope Magnetometer Barometer Temperature Humidity Proximity Light sensor GPS Cameras Microphone Samsung Galaxy S4

12. Smartphone as a sensor hub Mobility Low power consumption Low cost Allow user interface with data and device Activity tracker Soil moisture Body weight Blood pressure NODE 9 DOF motion Temperature Humidity Pressure Ambient Light Surface Color Chemical Gases Radiation Barcode RFID

13. Sensors are everywhere Cheap sensor system Data Cloud 100.25687C Accuracy of +/- 5C sensor We assume data is accurate at 100.25687C DateTimeTemp 05/09/201309:48:20.19100.25687 05/09/201309:49:21:8799.881234 05/09/2013 /10/2013 09:50:21.5598.77421 05/09/201309:51:29.28103.91876

14. Improper use of sensors Metal Oxide Carbon Monoxide sensor Inaccurate sensor prone to bias from temperature, humidity, and other gases On/Off Logic High resolution digitizer

15. Many poor sensors good data Garbage in garbage out A lot of garbage in is still just a lot of garbage out A lot of poor sensors means it is harder to extract information

16. How to get good sensor data? Many sensors are not independentGet sensor data in multiple dimensions in context of sensor attributes Metal Oxide Carbon Monoxide sensor Temperature Humidity Pressure H2

17. Know your sensor - know your data Your data are just as good as the sensor that measured themBig Data - Small Data - care about good data!

18. Future of Data Collection Rise of mobile sensing data Multi-dimensional sensor data Sensor accuracy matters