1. Studying Relationships between Human Posture and Health Risk Factors during Sedentary Activities
Tejas Srinivasan
Mentors: Vladimir Pavlovic
Saehoon Yi

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Problem
With suboptimal posture, sedentary activities for long hours can create major health risks
Can we discover causes for these health risks through analysis of posture and health of a subject throughout time?

3. Shimmer Sensors Wireless sensor platform Kinematic Sensing3
Shimmer Sensors
Wireless sensor platform
Kinematic Sensing
3-axis accelerometer
3-axis gyro
Biophysical Sensing
Electrocardiography
Electromyography
Skin conductance / Galvanic skin response

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Short-term Goals
Figure out how to collect and interpret kinematic and biophysical data from Shimmer sensors
Develop a system to classify posture from kinematic data
Develop a system to classify health risks from biophysical data

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Long-term Goals
Design and execute experiments which can be used to infer information about postural characteristics and health throughout time
Analyze data to discover relationships between postural characteristics and health risk factors in order to develop a model

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Current State
Testing and calibrating kinematic and biophysical sensors
Collecting and interpreting kinematic data
Configured a sensor to record gyroscope and accelerometer data
Accelerometers measure the g-force (acceleration relative to an object in free-fall) in the frame of reference of the sensor, whose orientation can change
Using gyroscope data, I want to obtain accurate acceleration data in the Earth frame
I want to accurately separate the linear acceleration and gravitational acceleration components.

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Possible uses
Knowledge of the precise relationships between posture and health can yield superior ergonomic designs for work- spaces