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Just In Time Carbon Footprint. Manu Gupta, Stephen Intille and Kent Larson MIT Media Lab, House_n. [email protected] [email protected] [email protected] Carbon Footprint. Measurement & calculation of CO 2 emitted as part of daily life activities Why measure Conserve energy

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Just in time carbon footprint

Just In TimeCarbon Footprint

Manu Gupta, Stephen Intille and Kent Larson

MIT Media Lab, House_n

[email protected]

[email protected]

[email protected]

Carbon footprint
Carbon Footprint

  • Measurement & calculation of CO2 emitted as part of daily life activities

  • Why measure

    • Conserve energy

    • Allow people to be aware of their emission

    • Help people change usage patterns

    • Its our responsibility

Our focus
Our Focus

  • Behavior change

    Measuring and motivating energy conservation behavior at the personal level

Placelab a live in laboratory
PlaceLab- A Live-In Laboratory

  • Data Collection

    • Only electric current information

    • 37 different electrical circuits fitted with current sensors

    • Circuits are divided into residential spaces and residential appliances

Placelab a live in laboratory1
PlaceLab- A Live-In Laboratory

  • Data Analysis

    • A Couple lived in the PlaceLab for 10 weeks

    • One day analysis

    • Annotation

      • Video analysis of usage, movement and behavior patterns

    • Current analysis

      • Of each individual appliance/device’s energy consumption

Analysis tool
Analysis Tool

  • Handlense sensor visualization tool

    • Developed at House_n

Vampire power sources

Unused lights & Devices

Projected usage
Projected Usage

Space in use

Devices in use


  • Total electricity consumed in 1 day = 13.45 KWh

  • With an “optimal” change in behavior (but without impacting quality of life)

    • They would have saved ~ 38% (5KWh) of the total

      electricity consumed

Behavior change strategies
Behavior Change Strategies

  • To motivate energy conservation behavior two strategies can be used

  • Responsive Automation*

  • Just in Time Intervention*

  • *Current research is on designing these strategies and testing how

  • much energy can be saved using them.

Behavioral change interfaces
Behavioral Change Interfaces

  • Exploring the use of phones for just-in-time positive reinforcement.

  • Key idea: positive reinforcement tied to small behavior changes (Detected by sensing)

  • May lead to gradual behavior change.

System components
System Components

  • Sensor Network

  • Control and Actuation system

  • Mobile Devices

  • Intervention strategies

System characteristics
System Characteristics

  • Low power

  • Wireless

  • Affordable

  • Real Time interaction with mobile devices

  • Non intrusive

  • Right mix of automation and intervention