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OpenSignal @jamescrr
Mobile: the Measure of All Things
24 hours of data received from OpenSignal
OpenSignal @jamescrr
Coming to a lecture theatre near you
1. Mobile sensors beat Human sensors
2. Mobile sensors are getting better.*
3. Mobile measures more than you think.
*humans aren’t.
OpenSignal & WeatherSignal sensor networks on 7m phones
OpenSignal @jamescrr
Man made Data
“Man is the measure of all things” - Protagoras
“In those days Caesar Augustus issued a decree
that a census should be taken of the entire
Roman world.” - NIV Bible
The Cheugugi rain gauge, Korea.
“that which no canvas sails could withstand” -
Force 12, the Beaufort Scale.
Chronicles. Annals. Diaries. Newspapers. Civil
records. Facebook. Twitter.
Da Vinci’s Schema delle Proporzioni
OpenSignal @jamescrr
Mobile Sensors & Repurposing
Fingerprint scanner
Heartrate
RGB Ambient Light
Relative humidity
Env. temperature
Barometer
NFC
Gyroscope
Accelerometer
Bluetooth radio
WiFi radio
FM radio
Cell radio
Front camera
Rear camera
GPS
Magnetic field
Light flux
Battery temp.
Microphone
Touch
S I S II S III S4 S5
Images from iFixit and forthcoming OpenSignal Sensor iIbrary
OpenSignal @jamescrr
Man vs Mobile
No artwork is enhanced by the addition of clipart.
It’s quite
warm.
It’s 26.2°C
Man is:
• Imprecise
• Low accuracy
• Limited range
• Magnetism?
• Not good at logging
OpenSignal @jamescrr
Mobile Sensors are getting better
New, Smarter, More Efficient
• New raw sensors (gas, sweat, heartrate)
• New virtual sensors offer context
awareness & more (pedometer, activity
recognition, significant motion)
• Efficiency of mobile sensing increasing
(co-processors/sensor batching)
OpenSignal @jamescrr
Outdoor temperature from phone batteries
All phones have
battery temperature
sensors
Lots of things influence
the battery
temperature
Including outdoor air
temp.
OpenSignal @jamescrr
Outdoor temperature from phone batteries
Linear
transformation.
Details in GRL &
at
OpenSignal.com/r
eports
OpenSignal @jamescrr
Do People Like Obama?
• WiFi routers are
occasionally named
to express political
opinions
• We found 1140
WiFis referencing
Obama in May
2012
• Net +ve sentiment
• Other WiFi tricks:
net discovery.
OpenSignal @jamescrr
When do we get up?
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
0.0
0.2
0.4
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
●
−0.25
0.00
0.25
0.50
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Hour
Weekdays – 8 am Weekends – 10 am
We modeled US LTE speeds with linear regression, variables included signal
quality and factors for hour of day.
OpenSignal @jamescrr
How much do I use my phone?
Feb Mar AprJanDec
0
5
10
15
20
• Number of times
I turn on my
Galaxy S4
screen per hour.
• Darkest blue is
50.
• GS4 is not my
only phone.
OpenSignal @jamescrr
The World is now your Lab
Mobiles sensors:
• pre-existing
• maintenance free
• continually upgraded
piece of scientific apparatus, capturing
unparalleled detail on the environment &
human activities.
Challenges
• Capabilities of mobile exceed the
ambition of app developers
• No Higgs boson sensor yet
Your device can be a nut in a scientific apparatus larger than the LHC
OpenSignal @jamescrr
We are Hiring
OpenSignal.com/jobs

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Mobile: The Measure of all Things

  • 1. OpenSignal @jamescrr Mobile: the Measure of All Things 24 hours of data received from OpenSignal
  • 2. OpenSignal @jamescrr Coming to a lecture theatre near you 1. Mobile sensors beat Human sensors 2. Mobile sensors are getting better.* 3. Mobile measures more than you think. *humans aren’t. OpenSignal & WeatherSignal sensor networks on 7m phones
  • 3. OpenSignal @jamescrr Man made Data “Man is the measure of all things” - Protagoras “In those days Caesar Augustus issued a decree that a census should be taken of the entire Roman world.” - NIV Bible The Cheugugi rain gauge, Korea. “that which no canvas sails could withstand” - Force 12, the Beaufort Scale. Chronicles. Annals. Diaries. Newspapers. Civil records. Facebook. Twitter. Da Vinci’s Schema delle Proporzioni
  • 4. OpenSignal @jamescrr Mobile Sensors & Repurposing Fingerprint scanner Heartrate RGB Ambient Light Relative humidity Env. temperature Barometer NFC Gyroscope Accelerometer Bluetooth radio WiFi radio FM radio Cell radio Front camera Rear camera GPS Magnetic field Light flux Battery temp. Microphone Touch S I S II S III S4 S5 Images from iFixit and forthcoming OpenSignal Sensor iIbrary
  • 5. OpenSignal @jamescrr Man vs Mobile No artwork is enhanced by the addition of clipart. It’s quite warm. It’s 26.2°C Man is: • Imprecise • Low accuracy • Limited range • Magnetism? • Not good at logging
  • 6. OpenSignal @jamescrr Mobile Sensors are getting better New, Smarter, More Efficient • New raw sensors (gas, sweat, heartrate) • New virtual sensors offer context awareness & more (pedometer, activity recognition, significant motion) • Efficiency of mobile sensing increasing (co-processors/sensor batching)
  • 7. OpenSignal @jamescrr Outdoor temperature from phone batteries All phones have battery temperature sensors Lots of things influence the battery temperature Including outdoor air temp.
  • 8. OpenSignal @jamescrr Outdoor temperature from phone batteries Linear transformation. Details in GRL & at OpenSignal.com/r eports
  • 9. OpenSignal @jamescrr Do People Like Obama? • WiFi routers are occasionally named to express political opinions • We found 1140 WiFis referencing Obama in May 2012 • Net +ve sentiment • Other WiFi tricks: net discovery.
  • 10. OpenSignal @jamescrr When do we get up? ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● 0.0 0.2 0.4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Hour ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● −0.25 0.00 0.25 0.50 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 Hour Weekdays – 8 am Weekends – 10 am We modeled US LTE speeds with linear regression, variables included signal quality and factors for hour of day.
  • 11. OpenSignal @jamescrr How much do I use my phone? Feb Mar AprJanDec 0 5 10 15 20 • Number of times I turn on my Galaxy S4 screen per hour. • Darkest blue is 50. • GS4 is not my only phone.
  • 12. OpenSignal @jamescrr The World is now your Lab Mobiles sensors: • pre-existing • maintenance free • continually upgraded piece of scientific apparatus, capturing unparalleled detail on the environment & human activities. Challenges • Capabilities of mobile exceed the ambition of app developers • No Higgs boson sensor yet Your device can be a nut in a scientific apparatus larger than the LHC
  • 13. OpenSignal @jamescrr We are Hiring OpenSignal.com/jobs

Editor's Notes

  1. Gets smarter as more people use the app
  2. Gets smarter as more people use the app
  3. Gets smarter as more people use the app