1. LOGO Presented: Deng-Sing Yang Adviser: Chih-Kuo Liang Date:2012.03.14 Potential Overwork Exposure System

2. LOGO OUTLINE Future works 4 References 5 Introduction 1 Materials & Methods 2 Results 3

3. LOGO INTRODUCTION Fatigue is usually a scenario seen during continuous work or driving Reduces a person’s attention and concentration Loss of ability to sustain a required performance

4. LOGO INTRODUCTION  Another aspect that needs to be noticed is that children and teenagers alike spend quite a number of hours playing video games  Children may keep on going over their limit that could eventually post significant health issues.  Symptoms include mood shifts, sleep dysregulation, inability to concentrate, appetite lost and among others www.themegallery.com

5. LOGO  In recent years, computer games has been a part of a college student’s life. In fact many consider it equally important with their textbooks and exams.  Males love to play PC games more than female INTRODUCTION

6. LOGO Cases of Sudden Deaths in Gaming 05/22/2008 Male, 43 after 20 hrs 12/10/2008 Male, 39 internet café 07/31/2010 Male, 50 internet café 07/28/2011 Boy after 3 hours 09/28/2011 Female, after 6 hours 02/03/2012 Male, 23 after 23 hours Suddenly died playing an online game while maintaining playing posture

7. LOGO New trends in fatigue monitoring  SmartCap monitors workers' fatigue levels by reading their brain waves  It measures employee fatigue in real time by monitoring its wearer's brain waves. From: 《 gizmag 》 January 30, 2012  3G video driver fatigue detection  Video supervision: Driver reminder via face location, eye location and tracking of fatigue judgment. From: 《 Electronic Science and Technology 》 November,2011

8. LOGO How did we choose this game?  NBA2k12 is a competitive sports game that makes a perfect combination with the NBA culture.  The game requires a lot of attention and cognitive analysis something in comparison to a person working New trends in fatigue monitoring

9. LOGO Why use a single channel wireless EEG? Three main reasons for using wireless EEG:  Most promising technology  Convenience  Easy integration to software  Ease of integration for future commercial purposes  Single channel EEG on the forehead with data transmitted wirelessly via Bluetooth while keeping track of the fatigue condition of the player.

10. LOGO MATERIALS AND METHODOLOGY www.themegallery.com

11. LOGO SUBJECTS  2 Male, Average age 27.5 years old  Recording:  5 minutes baseline  1 game of 12 minutes for each period  Approximately 1 hour or more of data collection www.themegallery.com

12. LOGO Research on fatigue detection  Physiological signals used to detect fatigue  EEG, EOG, ECG and sEMG  EOG being the most mature while EEG the most promising method of detecting fatigue.

13. LOGO Feature extraction methods  Software used:  LabVIEW VISA for Bluetooth interconnection Pt. by pt. 5 th order Butterworth filter Harmonic frequencies: Delta, Theta, Alpha1, Alpha2, Beta1 & Beta2 Auto power spectrum of the frequency bands

14. LOGO Analysis methods  (Alpha + Theta) / Beta ratio as a figure to measure fatigue.  Three kinds of EEG energy ratios (index ratio) ：  (α+θ)/β: (fatigue and drowsiness level)  θ/α: Relaxation level (relaxation level)  β/α: Awakening of standards (alertness level) www.themegallery.com

15. LOGO How did we determine the fatigue levels?  Fatigue assessment test platform in accordance with the EEG signal captured by the EEG amplifier, frequency-domain operations, according to the analysis rules of  Possible outcomes:  Normal  Mild  Moderate  Severe

16. LOGO System architecture  Therefore, the aim of this system is to study how determine the state of fatigue during gaming through measurement, recording and analyzing the players’ EEG.  The algorithm to measure and determine fatigue has gone through several tests and evaluation thus providing an improved method of measuring fatigue.  Results are then displayed through a user friendly and informative GUI.

17. LOGO Results and Discussion GUI

18. LOGO RESULTS  Player 1(Baseline: 2.77) www.themegallery.com

19. LOGO RESULTS  Player 2 (Baseline: 3.45 ) www.themegallery.com

20. LOGO FUTURE WORKS  The current system relies on a computer and in the future we are looking into using Android- based mobile phone to make it more practical. www.themegallery.com

21. LOGO REFERENCES [1] Y. Shigihara and M. Tanaka, “Relationship between fatigue and photosensitivity,” Behavioral Medicine, vol. 36, pp. 109-112, 2010. [2] S. Otmani, T. Pebayle, J. Roge, and A. Muzet, “Effect of driving duration and partial sleep deprivation on subsequent alertness and performance of cars drivers,” Physiology and Behavior, vol. 84, pp. 715-724, 2005. [3] J. Solodar, “Seizures triggered by video games: underestimated and undiagnosed,” taken from http://www.epilepsy.com/pdfs/journal/EIS-Issue3-2.pdf, accessed on December 18, 2011. [4] Y. Dong, Z. Hu, K. Uchimura, and N. Murayama, “Driver inattention monitoring system for intelligent vehicles: a review,” IEEE Trans on Intelligent Transportations Systems, vol. 12, no. 2, pp. 596-614, 2011. [5] B. T. Jap, S. Lal, P. Fischer, and E. Bekiaris, “Using EEG spectral components to assess algorithms for detecting fatigue,” Expert Systems with Applications, vol. 36, pp. 2352-2359, 2009. [6] H. J. Eoh, M. K. Chung, and S.-H. Kim, “Electroencephalographic study of drowsiness in simulated driving with sleep deprivation,” Industrial Ergonomics, vol. 35, pp. 307-320, 2005. [7] S. K. L. Lal, and A. Craig, “A critical review of the psychophysiology of driver fatigue,” Biological Psychology, vol. 55, pp. 173-194, 2001. www.themegallery.com

22. LOGO