skip to main content
research-article

A survey on smartphone-based systems for opportunistic user context recognition

Published:03 July 2013Publication History
Skip Abstract Section

Abstract

The ever-growing computation and storage capability of mobile phones have given rise to mobile-centric context recognition systems, which are able to sense and analyze the context of the carrier so as to provide an appropriate level of service. As nonintrusive autonomous sensing and context recognition are desirable characteristics of a personal sensing system; efforts have been made to develop opportunistic sensing techniques on mobile phones. The resulting combination of these approaches has ushered in a new realm of applications, namely opportunistic user context recognition with mobile phones.

This article surveys the existing research and approaches towards realization of such systems. In doing so, the typical architecture of a mobile-centric user context recognition system as a sequential process of sensing, preprocessing, and context recognition phases is introduced. The main techniques used for the realization of the respective processes during these phases are described, and their strengths and limitations are highlighted. In addition, lessons learned from previous approaches are presented as motivation for future research. Finally, several open challenges are discussed as possible ways to extend the capabilities of current systems and improve their real-world experience.

References

  1. Allen, F. R., Ambikairajah, E., Lovell, N. H., and Celler, B. G. 2006. An adapted Gaussian mixture model approach to accelerometry-based movement classification using time-domain features. In Proceedings of the 28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. (EMBS'06), 3600--3603.Google ScholarGoogle Scholar
  2. Aminian, K., Robert, P., Jéquier, E., and Schutz, Y. 1995. Incline, speed, and distance assessment during unconstrained walking. Med. Sci. Sports Exercise 27, 2, 226--34.Google ScholarGoogle ScholarCross RefCross Ref
  3. Anderson, I. and Muller, H. 2006a. Practical context awareness for GSM cell phones. In Proceedings of the 10th IEEE International Symposium on Wearable Computers. 127--128.Google ScholarGoogle Scholar
  4. Anderson, I. and Muller, H. 2006b. Practical activity recognition using GSM data. Tech. rep. CSTR-06-016 Department of Computer Science, University of Bristol.Google ScholarGoogle Scholar
  5. Anderson, I., Maitland, J., Sherwood, S., Barkhuus, L., Chalmers, M., Hall, M., Brown, B., and Muller, H. 2007. Shakra: Tracking and sharing daily activity levels with unaugmented mobile phones. Mob. Netw. Appl. 12, 185--199. Google ScholarGoogle ScholarDigital LibraryDigital Library
  6. Antonsson, E. K. and Mann, R. W. 1985. The frequency content of gait. J. Biomech. 18, 39--47.Google ScholarGoogle ScholarCross RefCross Ref
  7. Aoki, P. M., Grinter, R. E., Hurst, A., Szymanski, M. H., Thornton, J. D., and Woodruff, A. 2002. Sotto voce: Exploring the interplay of conversation and mobile audio spaces. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems: Changing our world, changing ourselves. 431--438. Google ScholarGoogle ScholarDigital LibraryDigital Library
  8. Arikawa, M., Konomi, S., and Ohnishi, K. 2007. Navitime: Supporting pedestrian navigation in the real world. IEEE Perv. Comput. 6, 21--29. Google ScholarGoogle ScholarDigital LibraryDigital Library
  9. Asahi Kasci. 2006. 6 Axis Electronic Compass Chip - AK8976A - Asahi Kasei. 2006. http://embedded-system.net/6-axis-electronic-compass-chip-ak8976a-asahi-kasei.html. (Last accessed 7/07).Google ScholarGoogle Scholar
  10. Atallah, L., Lo, B., Ali, R., King, R., and Yang, G., 2009. Real-time activity classification using ambient and wearable sensors. IEEE Tran. Inform. Technol. Biomed. 13, 6, 1031--1039. Google ScholarGoogle ScholarDigital LibraryDigital Library
  11. Atallah, L. and Yang, G. 2009. The use of pervasive sensing for behavior profiling -- a survey. Perv. Mobile Comput. 5, 5, 447--464. Google ScholarGoogle ScholarDigital LibraryDigital Library
  12. Azizyan, M., Constandache, I., and Roy Choudhury, R. 2009. SurroundSense: Mobile phone localization via ambience fingerprinting. In Proceedings of the 15th Annual International Conference on Mobile Computing and Networking. 261--272. Google ScholarGoogle ScholarDigital LibraryDigital Library
  13. Bahl, P. and Padmanabhan, V. N. 2000. RADAR: An in-building RF-based user location and tracking system. In Proceedings of the 19th Annual Joint Conference of the IEEE Computer and Communications Societies. Vol. 2, 775--784.Google ScholarGoogle Scholar
  14. Bao, L. and Intille, S. 2004. Activity recognition from user-annotated acceleration data. In Pervasive Computing, A. Ferscha and F. Mattern, Eds., Lecture Notes in Computer Science, vol. 3001, Springer, Springer Berlin/Heidelberg, 1--17.Google ScholarGoogle Scholar
  15. Barbeau, S. J., Winters, P. L., Georggi, N. L., Labrador, M. A., and Perez, R. 2010. Travel assistance device: Utilising global positioning system-enabled mobile phones to aid transit riders with special needs. Intell. Transport Syst. IET 4, 12--23.Google ScholarGoogle ScholarCross RefCross Ref
  16. Bar-Noy, A. and Kessler, I. 1993. Tracking mobile users in wireless communications networks. In Proceedings of the 12<sup>th</sup> Annual Joint Conference of the IEEE Computer and Communications Societies. Networking: Foundation for the Future. Vol. 3, 1232--1239.Google ScholarGoogle Scholar
  17. Basu, S. 2003. A linked-HMM model for robust voicing and speech detection. In Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP'03). I-816--I-819.Google ScholarGoogle ScholarCross RefCross Ref
  18. Berchtold, M., Budde, M., Gordon, D., Schmidtke, H. R., and Beigl, M. 2010. ActiServ: Activity recognition service for mobile phones. In Proceedings of the International Symposium on Wearable Computers (ISWC). 1--8.Google ScholarGoogle Scholar
  19. Bhattacharya, A., Mccutcheon, E. P., Shvartz, E., and Greenleaf, J. E. 1980. Body acceleration distribution and O2 uptake in humans during running and jumping. J. Appl. Physiol. 49, 881--887.Google ScholarGoogle ScholarCross RefCross Ref
  20. Bhattacharya, A. and Das, S. K. 1999. LeZi-update: An information-theoretic approach to track mobile users in PCS networks. In Proceedings of the 5th Annual ACM/IEEE International Conference on Mobile Computing and Networking. 1--12. Google ScholarGoogle ScholarDigital LibraryDigital Library
  21. Bieber, G., Voskamp, J., and Urban, B. 2009. Activity recognition for everyday life on mobile phones. In Proceedings of the Universal Access in Human-Computer Interaction. Intelligent and Ubiquitous Interaction Environments, C. Slephanidis, Ed., Lecture Notes in Computer Science, vol. 5615, Springer, Springer Berlin/Heidelberg, 289--296. Google ScholarGoogle ScholarDigital LibraryDigital Library
  22. Blanke, U. and Schiele, B. 2008. Sensing location in the pocket. In Proceedings of the 10th International Conference on Ubiquitous Computing (UbiComp, adjunct proceedings). 1--2.Google ScholarGoogle Scholar
  23. Blum, M., Pentland, A., and Troster, G. 2006. InSense: Interest-based life logging. IEEE Multimedia 13, 40--48. Google ScholarGoogle ScholarDigital LibraryDigital Library
  24. Bouten, C. V. C., Koekkoek, K. T. M., Verduin, M., Kodde, R., and Janssen, J. D. 1997. A triaxial accelerometer and portable data processing unit for the assessment of daily physical activity. IEEE Trans. Biomed. Eng. 44, 136--147.Google ScholarGoogle ScholarCross RefCross Ref
  25. Brezmes, T., Gorricho, J., and Cotrina, J. 2009. Activity recognition from accelerometer data on a mobile phone. In Proceedings of the 10th International Work-Conference on Artificial Neural Networks: Part II: Distributed Computing, Artificial Intelligence, Bioinformatics, Soft Computing, and Ambient Assisted Living. 796--799. Google ScholarGoogle ScholarDigital LibraryDigital Library
  26. Bruns, E., Brombach, B., Zeidler, T., and Bimber, O. 2007. Enabling mobile phones to support large-scale museum guidance. IEEE Multimedia 14, 2, 16--25. Google ScholarGoogle ScholarDigital LibraryDigital Library
  27. Cakmaci, O. and Coutaz, J. 2002. Context awareness in systems with limited resources. In Proceedings of the 3rd Workshop on Artificial Intelligence in Mobile Systems (AIMS).Google ScholarGoogle Scholar
  28. Candia, J., González, M. C., Wang, P., Schoenharl, T., Madey, G., and Barabási, A.-L. 2008. Uncovering individual and collective human dynamics. J. Physics A, 41, 22, 4015--26.Google ScholarGoogle ScholarCross RefCross Ref
  29. Cappé, O., Moulines, E., and Rydén, T. 2005. Inference in Hidden Markov Models. Springer, Berlin. Google ScholarGoogle ScholarDigital LibraryDigital Library
  30. Cappozzo, A. 1989. Low frequency self-generated vibration during ambulation in normal men. J. Biomech. 15, 599--609.Google ScholarGoogle ScholarCross RefCross Ref
  31. Caruana, R. and Niculescu-Mizil, A. 2006. An empirical comparison of supervised learning algorithms. In Proceedings of the 23rd International Conference on Machine Learning. 161--168. Google ScholarGoogle ScholarDigital LibraryDigital Library
  32. Chen, D. M., Tsai, S. S., Vedantham, R., Grzeszczuk, R., and Girod, B. 2009. Streaming mobile augmented reality on mobile phones. In Proceedings of the 8th IEEE International Symposium on Mixed and Augmented Reality. 181--182. Google ScholarGoogle ScholarDigital LibraryDigital Library
  33. Cheng, Y., Chawathe, Y., Lamarca, A., and Krumm, J. 2005. Accuracy characterization for metropolitan-scale Wi-Fi localization. In Proceedings of the 3rd International Conference on Mobile Systems, Applications, and Services. 233--245. Google ScholarGoogle ScholarDigital LibraryDigital Library
  34. Cho, S. B., Kim, K. J., Hwang, K. S., and Song, I. J. 2007. AniDiary: Daily cartoon-style diary exploits Bayesian networks. J. Perv. Comput. 6, 3, 67--74. Google ScholarGoogle ScholarDigital LibraryDigital Library
  35. Cho, S. J., Oh, J. K., and Bang, W. C. 2004. Magic wand: A hand-drawn gesture input device in 3-D space with inertial sensors. In Proceedings of the 9th International Workshop on Frontiers in Handwriting Recognition (IWFHR'9). 106--11. Google ScholarGoogle ScholarDigital LibraryDigital Library
  36. Choudhury, T., Consolvo, S., Harrison, B., Hightower, J., Lamarca, A., Legrand, L., Rahimi, A., Rea, A., Bordello, G., Hemingway, B., Klasnja, P., Koscher, K., Landay, J. A., Lester, J., Wyatt, D., and Haehnel, D. 2008. The mobile sensing platform: An embedded activity recognition system. IEEE Perv. Comput. 7, 32--41. Google ScholarGoogle ScholarDigital LibraryDigital Library
  37. Crk, I., Albinali, F., Gniady, C., and Hartman, J. 2009. Understanding energy consumption of sensor enabled applications on mobile phones. In Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society. (EMBC'09). 6885--6888.Google ScholarGoogle Scholar
  38. Cross, R., Borgatti, S., and Parker, A. 2002. Making invisible work visible: Using social network analysis to support strategic collaboration. Calif. Manage. Rev. 44, 2, 25--46.Google ScholarGoogle ScholarCross RefCross Ref
  39. Dartmouth College. 2010. Mobile sensing group. http://sensorlab.cs.dartmouth.edu./. (Last accessed 10/10).Google ScholarGoogle Scholar
  40. Das, T., Mohan, P., Padmanabhan, V. N., Ramjee, R., and Sharma, A. 2010. PRISM: Platform for remote sensing using smartphones. In Proceedings of the 8th International Conference on Mobile Systems, Applications, and services. 63--76. Google ScholarGoogle ScholarDigital LibraryDigital Library
  41. Davis, M., Smith, M., Stentiford, F. W. M., Bamidele, A., Canny, J., Good, N., King, S., and Janakiraman, R. 2006. Using context and similarity for face and location identification. In Proceedings of the IS & T/SPIE Electronic Imaging Conference. 1--9.Google ScholarGoogle Scholar
  42. Deligne, S., Dharanipragada, S., Gopinath, R., Maison, B., Olsen, P., and Printz, H. 2002. A robust high accuracy speech recognition system for mobile applications. IEEE Trans. Speech Audio Process. 10, 8, 551--561.Google ScholarGoogle ScholarCross RefCross Ref
  43. Deselaers, T., Heigold, G., and Ney, H. 2008. SVMs, Gaussian mixtures, and their generative/discriminative fusion. In Proceedings of the 19th International Conference on Pattern Recognition (ICPR'08). 1--4.Google ScholarGoogle Scholar
  44. Dixon, S. 2006. Onset detection revisited. In Proceedings of the 9th International Conference on Digital Audio Effects (DAFx06). 18--20.Google ScholarGoogle Scholar
  45. Duda, R. O., Hart, P. E., and Stork, D. G. 2000. Pattern Classification 2nd Ed. John Wiley and Sons Hoboken, NJ. Google ScholarGoogle ScholarDigital LibraryDigital Library
  46. Eagle, N. and Pentland, A. 2005. Social serendipity: Mobilizing social software. IEEE Perv. Compu. 4, 28--34. Google ScholarGoogle ScholarDigital LibraryDigital Library
  47. Eagle, N. and Pentland, A. 2006. Reality mining: Sensing complex social systems. Pers. Ubiq. Comput. 10, 4, 255--268.Google ScholarGoogle ScholarDigital LibraryDigital Library
  48. Eagle, N., Quinn, J. A., and Clauset, A. 2009. Methodologies for continuous cellular tower data analysis. In Proceedings of the 7th International Conference on Pervasive Computing. Lecture Notes in Computer Science, vol. 5538, Springer-Verlag, Berlin, Heidelberg, 342--353. Google ScholarGoogle ScholarDigital LibraryDigital Library
  49. Ermes, M., Parkka, J., and Cluitmans, L. 2008. Advancing from offline to online activity recognition with wearable sensors. In Proceedings of the 30th Annual International Conference of the IEEE, Engineering in Medicine and Biology Society. 4451--4454.Google ScholarGoogle Scholar
  50. Erol, B., Graham, J., Antúnez, E., and Hull, J. J. 2008. HOTPAPER: Multimedia interaction with paper using mobile phones. In Proceeding of the 16th ACM International Conference on Multimedia. 399--408. Google ScholarGoogle ScholarDigital LibraryDigital Library
  51. European Social Survey. 2009. http://www.europeansocialsurvey.org./. (Last accessed 10/11).Google ScholarGoogle Scholar
  52. Evans, A., Duncan, G., and Gilchrist, W. 1991. Recording accelerations in body movements. Med. Bio. Eng. Comput. 29, 1, 102--104.Google ScholarGoogle ScholarCross RefCross Ref
  53. Fang, L., Antsaklis, P. J., Montestruque, L. A., Mcmickell, M. B., Lemmon, M., Sun Y., Fang, H., Koutroulis, I., Haenggi, M., Xie, M., and Xie, X. 2005. Design of a wireless assisted pedestrian dead reckoning system - the NavMote experience. IEEE Trans. Instrument. Measure. 54, 6, 2342--2358.Google ScholarGoogle ScholarCross RefCross Ref
  54. Fawcett, T., and Provost, F. 1996. Combining data mining and machine learning for effective user profiling. In Proceedings of the ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD96). 8--13.Google ScholarGoogle Scholar
  55. Ferro, E. and Potorti, F. 2005. Bluetooth and Wi-Fi wireless protocols: A survey and a comparison. IEEE Wireless Communi. 12, 12--26. Google ScholarGoogle ScholarDigital LibraryDigital Library
  56. Fleury, A., Vacher, M. and Noury, N. 2010. SVM-based multimodal classification of activities of daily living in health smart homes: Sensors, algorithms, and first experimental results. IEEE Trans. Inform. Techno. Biomed. 14, 2, 274--283. Google ScholarGoogle ScholarDigital LibraryDigital Library
  57. Friedman, J. H. 1997. On bias, variance, 0/1—loss, and the curse-of-dimensionality. Data Mining Knowl. Discovery 1, 55--77. Google ScholarGoogle ScholarDigital LibraryDigital Library
  58. Frigo, M. 1999. A fast Fourier transform compiler. In Proceedings of the ACM SIGPLAN Conference on Programming Language Design and Implementation. 169--180. Google ScholarGoogle ScholarDigital LibraryDigital Library
  59. Froehlich, J., Chen, M. Y., Consolvo, S., Harrison, B., and Landay, J. A. 2007. My Experience: A system for in situ tracing and capturing of user feedback on mobile phones. In Proceedings of the 5th International Conference on Mobile Systems, Applications and Services. 57--70. Google ScholarGoogle ScholarDigital LibraryDigital Library
  60. Gaonkar, S., Li, J., Choudhury, R. R., Cox, L., and Schmidt, A. 2008. Micro-Blog: Sharing and querying content through mobile phones and social participation. In Proceeding of the 6th International Conference on Mobile Systems, Applications, and Services. 174--186. Google ScholarGoogle ScholarDigital LibraryDigital Library
  61. Gesis. 2009. Leibniz Institute for the Social Sciences. http://www.gesis.org/en/services/data/survey-data/issp/modules-study-overview/social-networks/2001/. (Last accessed 10/11).Google ScholarGoogle Scholar
  62. Ghiani, G. and Paternò, F. 2010. Supporting mobile users in selecting target devices. J. Univ. Compu. Sci. 16, 15, 2019--2037.Google ScholarGoogle Scholar
  63. Golding, A. and Lesh, N. 1999. Indoor navigation using a diverse set of cheap, wearable sensors. In Proccedings of the International Symposium on Wearable Computers (ISWC'99). 29--36. Google ScholarGoogle ScholarDigital LibraryDigital Library
  64. Gonzalez, M. C., Hidalgo, C. A., and Barabasi, A. 2008. Understanding individual human mobility patterns. Nature 453, 779--782.Google ScholarGoogle ScholarCross RefCross Ref
  65. Grisworld, W. G., Boyer, R., Brown, S. W., Truong, T. M., Bhasker, E., Jay, G. R., and Shapiro, R. B. 2002. Using mobile technology to create opportunitistic interactions on university campus. In Proceedings of the Ubicomp Workshop on Supporting Spontaneous Interaction in Ubiquitous Computing Settings.Google ScholarGoogle Scholar
  66. Gu, J., Mukundan, R., and Billinghurst, M. 2008. Developing mobile phone AR applications using J2ME. In Proceedings of the 23rd International Conference Image and Vision Computing. 1--6.Google ScholarGoogle Scholar
  67. Gyorbíró, N., Fábián, A., and Hományi, G. 2009. An activity recognition system for mobile phones. Mobile Netw. Appl. 14, 82--91. Google ScholarGoogle ScholarDigital LibraryDigital Library
  68. Hailes, S., Sicari, S., and Roussos, G., Eds. 2009. Sensor Systems and Softwear 1st Ed. Springer, New York, NY.Google ScholarGoogle Scholar
  69. Häkkilä, J., and Chatfield, C. 2005. ‘It's like if you opened someone else's letter’: user perceived privacy and social practices with SMS communication. In Proceedings of the 7th International Conference on Human Computer Interaction with Mobile Devices & Services. 219--222. Google ScholarGoogle ScholarDigital LibraryDigital Library
  70. Haro, A., Mori, K., Setlur, V., and Capin, T. 2005. Mobile camera-based adaptive viewing. In Proceedings of the 4th International Conference on Mobile and Ubiquitous Multimedia. 78--83. Google ScholarGoogle ScholarDigital LibraryDigital Library
  71. Havasi, C., Speer, R., Pustejovsky, J., and Lieberman, H. 2009. Digital intuition: Applying common sense using dimensionality reduction. IEEE Intell. Syst. 24, 24--35. Google ScholarGoogle ScholarDigital LibraryDigital Library
  72. Haykin, S. S. 2009. Neural Networks and Learning Machines. Prentice Hall, Upper Saddle River, NJ.Google ScholarGoogle Scholar
  73. He, J., Li, H., and Tan, J. 2007. Real-time daily activity classification with wireless sensor networks using hidden markov model. In Proceedings of the 29th Annual International Conference on Engineering in Medicine and Biology Society (EMBS'07). 3192--95.Google ScholarGoogle Scholar
  74. Herrera, J. C., Work, D. B., Herring, R., Ban, X. J., and Bayen, A. M. 2010. Evaluation of traffic data obtained via GPS-enabled mobile phones: The mobile century field experiment. Transport. Res. Part C: 18, 4, 568--83.Google ScholarGoogle ScholarCross RefCross Ref
  75. Hightower, J. and Borriello, G. 2001. Location systems for ubiquitous computing. IEEE Comput. Maga. 4, 8, 57--66. Google ScholarGoogle ScholarDigital LibraryDigital Library
  76. Himberg, J., Korpiaho, K., Mannila, H., Tikanmaki, J., and Toivonen, H. T. T. 2001. Time series segmentation for context recognition in mobile devices. In Proceedings of the IEEE International Conference on Data Mining, (ICDM'01). 203--210. Google ScholarGoogle ScholarDigital LibraryDigital Library
  77. Hoseinitabatabaei, S. A., Gluhak, A., and Tafazolli, R. 2011. uDirect: A novel approach for pervasive observation of user direction with mobile phones. In Proceedings of the IEEE International Conference on Pervasive Computing and Communications (PerCom). 74--83. Google ScholarGoogle ScholarDigital LibraryDigital Library
  78. Huynh, T., Fritz, M., and Schiele, B. 2008. Discovery of activity patterns using topic models. In Proceedings of the 10th International Conference on Ubiquitous Computing. 10--19. Google ScholarGoogle ScholarDigital LibraryDigital Library
  79. Ichikawa, F., Chipchase, J., and Grignani, R. 2005. Where's the phone&quest; A study of mobile phone location in public spaces. In Proceedings of the 2nd International Conference on Mobile Technology, Applications and Systems. 1--8.Google ScholarGoogle Scholar
  80. Iso, T. and Yamazaki, K. 2006. Gait analyzer based on a cell phone with a single three-axis accelerometer. In Proceedings of the 8th Conference on Human-Computer Interaction with Mobile Devices and Services. 141--144. Google ScholarGoogle ScholarDigital LibraryDigital Library
  81. Jain, A. K., Murty, M. N. and Flynn, P. J. 1999. Data clustering: A review. ACM Comput. Sur. 31, 264--323. Google ScholarGoogle ScholarDigital LibraryDigital Library
  82. Kanjo, E., Bacon, J., Roberts, D., and Landshoff, P. 2009. MobSens: Making smart phones smarter. IEEE Perv. Comput. 8, 50--57. Google ScholarGoogle ScholarDigital LibraryDigital Library
  83. Kanjo, E. 2010. NoiseSPY: A real-time mobile phone platform for urban noise monitoring and mapping. Mob. Netw. Appl. 15, 562--574. Google ScholarGoogle ScholarDigital LibraryDigital Library
  84. Kansal, A., and Zhao, F. 2007. Location and mobility in a sensor network of mobile phones. In Proceedings of the 17th International Workshop on Network and Operating Systems Support for Digital Audio & Video (NOSSDAV).Google ScholarGoogle Scholar
  85. Kapadia, A., Kotz, D., and Triandopoulos, N. 2009. Opportunistic sensing: Security challenges for the new paradigm. In Proccedings of the International Communication Systems and Networks and Workshops. (COMSNETS'09), 1--10. Google ScholarGoogle ScholarDigital LibraryDigital Library
  86. Katzakis, N. and Hori, M. 2009. Mobile phones as 3-DOF controllers: A comparative study. In Proceedings of the 8th IEEE International Conference on Dependable, Autonomic and Secure Computing (DASC'09). 345--349. Google ScholarGoogle ScholarDigital LibraryDigital Library
  87. Kawahara, Y., Kurasawa, H., and Morikawa, H. 2007. Recognizing user context using mobile handsets with acceleration sensors. In Proceedings of the IEEE International Conference on Portable Information Devices (PORTABLE'07). 1--5.Google ScholarGoogle Scholar
  88. Kim, S. J. and Lee, C. Y. 1996. Modeling and analysis of the dynamic location registration and paging in microcellular systems. IEEE Trans. Vehicular Technol. 45, 82--90.Google ScholarGoogle ScholarCross RefCross Ref
  89. Kim, T., Chang, A., Holland, L., and Pentland, A. 2008. Meeting mediator: Enhancing group collaboration with sociometric feedback. In Proceedings of the ACM Conference on Computer Supported Cooperative Work (CSCW'08). 457--466. Google ScholarGoogle ScholarDigital LibraryDigital Library
  90. Könönen, V., Mäntyjärvi, J., Similä, H., Pärkkä, J., and Ermes, M. 2010. Automatic feature selection for context recognition in mobile devices. Perv. Mobile Compu. 6, 181--197. Google ScholarGoogle ScholarDigital LibraryDigital Library
  91. Kourogi, M. and Kurata, T. 2003a. Personal positioning based on walking locomotion analysis with self-contained sensors and a wearable camera. In Proceedings of the 2nd IEEE and ACM International Symposium on Mixed and Augmented Reality. 103--112. Google ScholarGoogle ScholarDigital LibraryDigital Library
  92. Kourogi, M. and Kurata, T. 2003b. A wearable augmented reality system with personal positioning based on walking locomotion analysis. In Proceedings of the 2nd IEEE and ACM International Symposium on Mixed and Augmented Reality. 342--343. Google ScholarGoogle ScholarDigital LibraryDigital Library
  93. Krumm, J. and Horvitz, E. 2004. LOCADIO: Inferring motion and location from Wi-Fi signal strengths. In Proceedings of the Ist Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services (MobiQuitous'04). 4--13.Google ScholarGoogle Scholar
  94. Kunze, K. and Lukowicz, P. 2007. Using acceleration signatures from everyday activities for on-body device location. In Proceedings of the 11th IEEE International Symposium on Wearable Computers. 115--116. Google ScholarGoogle ScholarDigital LibraryDigital Library
  95. Kunze, K., Lukowicz, P., Partridge, K., and Begole, B. 2009. Which way am I facing: Inferring horizontal device orientation from an accelerometer signal. In Proceedings of the International Symposium on Wearable Computers (ISWC'09). 149--150. Google ScholarGoogle ScholarDigital LibraryDigital Library
  96. Kunze, K., Lukowicz, P., Junker, H., and Tröster, G. 2005. Where am I: Recognizing on-body positions of wearable sensors. In Proceedings of the Ist International Conference on Location- and Context-Awareness, T. Strung and C. Linnhoyp-Popien, Eds., 257--268. Google ScholarGoogle ScholarDigital LibraryDigital Library
  97. Kwapisz, J. R., Weiss, G. M., and Moore, S. A. 2011. Activity recognition using cell phone accelerometers. SIGKDD Explor. Newsl. 12, 74--82. Google ScholarGoogle ScholarDigital LibraryDigital Library
  98. Kyriazakos, S. and Karetsos, G. 2000. Architectures for the provision of position location services in cellular networking environments. In Proceedings of the Telecommunications and IT Convergence Towards Service E-volution, J. Delgado, G. Stamoulis, A. Mulleey, D. Prevedourou, and K. Start, Eds., Lecture Notes in Computer Science, vol. 1774, Springer, Berlin/Heidelberg, 269--282. Google ScholarGoogle ScholarDigital LibraryDigital Library
  99. Laasonen, K., Raento, M., and Toivonen, H. 2004. Adaptive on-device location recognition. In Proceedings of the 2nd International Conference on Pervasive Computing. 287--304.Google ScholarGoogle Scholar
  100. Lafortune, M. A. 1991. Three dimensional acceleration of tibia during walking and running. J. Biomech. 24, 877--86.Google ScholarGoogle ScholarCross RefCross Ref
  101. Lane, N. D., Miluzzo, E., Hong Lu, Peebles, D., Choudhury, T., and Campbell, A. T. 2010. A survey of mobile phone sensing. IEEE Commun. Mag. 48, 140--150. Google ScholarGoogle ScholarDigital LibraryDigital Library
  102. Larsen, J. E., and Luniewski, M. 2009. Using mobile phone contextual information to facilitate managing image collections. In Proceedings of the Personal Information Management Workshop(PIM'09). 73--75.Google ScholarGoogle Scholar
  103. Lee, S. W. and Mase, K. 2001. Incremental motion-based location recognition. In Proceedings of the 5th IEEE International Symposium on Wearable Computers. 123--130 Google ScholarGoogle ScholarDigital LibraryDigital Library
  104. Lee, S. W. and Mase, K. 2002. Activity and location recognition using wearable sensors. Proceedings of the IEEE Perv. Comput. 1, 24--32. Google ScholarGoogle ScholarDigital LibraryDigital Library
  105. Lerch, A. 2009. Software-based extraction of objective parameters from music performances. Ph.D. Dissertation. Berlin Technical University.Google ScholarGoogle Scholar
  106. Lester, J., Choudhury, T., and Borriello, G. 2006. A practical approach to recognizing physical activities. In Proceedings of the 4th International Conference on Pervasive Computing, K. Fishan, B. Schiele, P. Nixon, and A. Quigley, Eds., Springer Berlin/Heidelberg, 1--16. Google ScholarGoogle ScholarDigital LibraryDigital Library
  107. Lim, J. H., Li, Y., You, Y., and Chevallet, J.-P. 2007. Scene recognition with camera phones for tourist information access. In Proceedings of the IEEE International Conference on Multimedia and Expo. 100--103.Google ScholarGoogle Scholar
  108. Liu, Q., Mcevoy, P., and Lai, C. 2006. Mobile camera supported document redirection. In Proceedings of the 14th Annual ACM International Conference on Multimedia. 791--792. Google ScholarGoogle ScholarDigital LibraryDigital Library
  109. Lotte, F., Congedo, M., Lécuyer, A., Lamarche, F., and Arnaldi, B. 2007. A review of classification algorithms for EEG-based brain-computer interfaces. J. Neural Eng, 4, 2, 1--13.Google ScholarGoogle ScholarCross RefCross Ref
  110. Lu, H., Pan, W., Lane, N. D., Choudhury, T., and Campbell, A. T. 2009. SoundSense: Scalable sound sensing for people-centric applications on mobile phones. In Proceedings of the 7th International Conference on Mobile Systems, Applications, and Services. 165--178. Google ScholarGoogle ScholarDigital LibraryDigital Library
  111. Lu, H., Yang, J., Liu, Z., Lane, N. D., Choudhury, T. and Campbell, A. T. 2010. The Jigsaw continuous sensing engine for mobile phone applications. In Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems. 71--84. Google ScholarGoogle ScholarDigital LibraryDigital Library
  112. Luinge, H. J., Veltink, P. H., and Baten, C. T. M. 1999. Estimation of orientation with gyroscopes and accelerometers. In Proceedings of the 1st Joint BMES/EMBS Conference Saving Humanity, Advancing Technology, vol. 2, 844.Google ScholarGoogle Scholar
  113. Martens, H. and Naes, T. 2002. Multivariate Calibration. John Wiley & Sons, Hoboken, NJ.Google ScholarGoogle Scholar
  114. Martin, G. N., Carlson, N. R., and Buskist, W. 2007. Psychology. Pearson Education, Harlow, Essex.Google ScholarGoogle Scholar
  115. Mathie, M. J., Coster, A. C., Lovell, N. H., and Celler, B. G. 2004. Accelerometery: Providing an integrated, practical method for long-term, ambulatory monitoring of human movement. Physiol. Measure. 25, 2, 1--20.Google ScholarGoogle ScholarCross RefCross Ref
  116. Maurer, U., Rowe, A., Smailagic, A., and Siewiorek, D. 2006. Location and activity recognition using eWatch: A wearable sensor platform. In Proceedings of the Ambient Intelligence in Everyday Life, Y. Cay and J. Abascal, Eds., Lecture Notes in Computer Science, vol. 3864, Springer Berlin/Heidelberg, 86--102. Google ScholarGoogle ScholarDigital LibraryDigital Library
  117. Mayagoitia, R. E., Lötters, J. C., Veltink, P. H., and Hermens, H. 2002. Standing balance evaluation using a triaxial accelerometer. Gait & Posture 16, 55--59.Google ScholarGoogle ScholarCross RefCross Ref
  118. Mcneill, P. and Chapman, S. 2005. Research Methods. Routledge, New York, NY.Google ScholarGoogle Scholar
  119. Meeuwissen, E., Reinold, P., and Liem, C. 2007. Inferring and predicting context of mobile users. Bell Labs Tech. J. 12, 79--86. Google ScholarGoogle ScholarDigital LibraryDigital Library
  120. Miluzzo, E., Lane, N. D., Fodor, K., Peterson, R., Lu, H., Musolesi, M., Eisenman, S. B., Zheng, X., and Campbell, A. T. 2008. Sensing meets mobile social networks: The design, implementation and evaluation of the CenceMe application. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems. 337--350. Google ScholarGoogle ScholarDigital LibraryDigital Library
  121. Mirkin, B. 2005. Clustering for Data Mining, a Data Recovery Approach. Chapman & Hall/CRC, Boca Raton, FL. Google ScholarGoogle ScholarDigital LibraryDigital Library
  122. Mishra, A. R. 2004. Fundamentals of Cellular Network Planning and Optimization. John Wiley & Sons, Chichester, West Sussex. Google ScholarGoogle ScholarDigital LibraryDigital Library
  123. Mizell, D. 2003. Using gravity to estimate accelerometer orientation. In Proceedings of the 7th IEEE International Symposium on Wearable Computers. 252--253. Google ScholarGoogle ScholarDigital LibraryDigital Library
  124. Mohan, P., Padmanabhan, V. N., and Ramjee, R. 2008. Nericell: Using mobile smartphones for rich monitoring of road and traffic conditions. In Proceedings of the 6th ACM Conference on Embedded Network Sensor Systems. 357--358. Google ScholarGoogle ScholarDigital LibraryDigital Library
  125. Morris, S. J. and Paradiso, J. A. 2002. Shoe-integrated sensor system for wireless gait analysis and real-time feedback. In Proceedings of the 2nd Joint IEEE EMBS and BMES Conferences, vol. 3, 2468--2469.Google ScholarGoogle Scholar
  126. Mostefaoui, G. K., Pasquier-Rocha, J., and Brezillon, P. 2004. Context-aware computing: A guide for the pervasive computing community. In Proceedings of the IEEE/ACS International Conference on Pervasive Services (ICPS'04). 39--48. Google ScholarGoogle ScholarDigital LibraryDigital Library
  127. Motani, M., Srinivasan, V., and Nuggehalli, P. S. 2005. PeopleNet: Engineering a wireless virtual social network. In Proceedings of the 11th Annual International Conference on Mobile Computing and Networking. 243--257. Google ScholarGoogle ScholarDigital LibraryDigital Library
  128. Mun, M., Reddy, S., Shilton, K., Yau, N., Burke, J., Estrin, D., Hansen, M., Howard, E., West, R., and Boda, P. 2009. PEIR, the personal environmental impact report, as a platform for participatory sensing systems research. In Proceedings of the 7th International Conference on Mobile Systems, Applications, and Services. 55--68. Google ScholarGoogle ScholarDigital LibraryDigital Library
  129. Murray, M. 1967. “Gait as a total pattern of movement”. Am. J. Phys. Med. 46, 1, 290--333.Google ScholarGoogle Scholar
  130. Nokia 2005. Proceedings of the Workshop on Large-Scale Sensor Networks and Their Applications. 3--6.Google ScholarGoogle Scholar
  131. Ofstad, A., Nicholas, E., Szcodronski, R., and Choudhury, R. R. 2008. AAMPL: Accelerometer augmented mobile phone localization. In Proceedings of the Ist ACM International Workshop on Mobile Entity Localization and Tracking in GPS-Less Environments. 13--18. Google ScholarGoogle ScholarDigital LibraryDigital Library
  132. Olmedilla, D., Frías-martínez, E., and Lara, R. 2010. Mobile web profiling: A study of off-portal surfing habits of mobile users. In User Modeling, Adeptation, and Personalization, P. D. Bra, A. Kobra, and D. N. Chen, Eds., Lecture Notes in Computer Science, vol. 6075, Springer, 339--350. Google ScholarGoogle ScholarDigital LibraryDigital Library
  133. Ohmori, N., Nakazato, M., and Harata, N. 2005. GPS mobile phone-based activity diary survey. In Proceedings of the Eastern Asia Society for Transportation Studies. 1104--1115.Google ScholarGoogle Scholar
  134. Olguin, D. O. and Pentland, A. 2006. Human activity recognition: Accuracy across common locations for wearable sensors. In Proceedings of the IEEE 10th Symposium on Wearable Computers.Google ScholarGoogle Scholar
  135. Olguin, D. O. and Pentland, A. 2008. Social sensors for automatic data collection. In Proceedings of the 14th Americas Conference on Information Systems. 1--10.Google ScholarGoogle Scholar
  136. Onnela, J. P., Saramäki, J., Hyvönen, J., Szabo, G., Lazer, D., Kaski, K., Kertesz, J., and Barabasi, A. L. 2007. Structure and tie strengths in mobile communication networks. In Proceedings of the National Academy of Science of the United States of America (PNAS). 7332--36.Google ScholarGoogle Scholar
  137. Paulos, E. and Goodman, E. 2004. The familiar stranger: Anxiety, comfort, and play in public places. In Proceedings of the SIGCHI Conference on Human Factors in Computing Systems. 223--230. Google ScholarGoogle ScholarDigital LibraryDigital Library
  138. Peebles, D., Lu, H., Lane, N. D., Choudhury, T., and Campbell, A. T. 2010. Community-guided learning: Exploiting mobile sensor users to model human behavior. In Proceedings of the 24th AAAI Conference on Artificial Intelligence.Google ScholarGoogle Scholar
  139. Pentland, A. 2009. Honest Signals: How They Shape Our World. MIT Press, Cambridge, MA. Google ScholarGoogle ScholarDigital LibraryDigital Library
  140. Picard, R. W. and Healey, J. 1997. Affective wearables. In Proceedings of the 1st International Symposium on Wearable Computers. 90--97. Google ScholarGoogle ScholarDigital LibraryDigital Library
  141. Pietquin, O. 2004. A framework for unsupervised learning of dialogue strategies. P.D. dissertation. Universitaires de Louvain. ISBN: 2-930344-63-6.Google ScholarGoogle Scholar
  142. Preece, S. J., Goulermas, J. Y., Kenney, L. P. J., Howard, D., Meijer, K., and Crompton, R. 2009. Activity identification using body-mounted sensors - a review of classification techniques. Physiol. Measure. 30, 4, 1--33.Google ScholarGoogle ScholarCross RefCross Ref
  143. Levi, R. and Judd, T. 1996. Dead reckoning navigational system using accelerometer to measure foot impacts. U.S. patent 5583776, filed March 16, 1995, and issued December 10, 1996.Google ScholarGoogle Scholar
  144. Ravi, N., Shankar, P., Frankel, A., Elgammal, A., and Iftode, L. 2006. Indoor localization using camera phones. In Proceedings of the 7th IEEE Workshop on Mobile Computing Systems and Applications (WMCSA'06). 1--7. Google ScholarGoogle ScholarDigital LibraryDigital Library
  145. Ravi, N., Dandekar, N., Mysore, P., and Littman, M. L. 2005. Activity recognition from accelerometer data. In Proceedings of the 17th Conference on Innovative Applications of Artificial Intelligence. vol. 3, 1541--1546. Google ScholarGoogle ScholarDigital LibraryDigital Library
  146. Redmond, D. and Hegge, F. 1985. Observations on the design and specification of a wrist-worn human activity monitoring system. Behav. Res. Methods 17, 659--669.Google ScholarGoogle ScholarCross RefCross Ref
  147. Ross, T. 2004. Fuzzy Logic with Engineering Applications 2nd Ed. John Wiley & Sons, Chichester, West Sussex.Google ScholarGoogle Scholar
  148. Ruf, B. and Detyniecki, M. 2009. Identifying paintings in museum galleries using camera mobile phones. In Proceedings of the Singaporean-French IPAL Symposium. 125--34.Google ScholarGoogle Scholar
  149. Santini, S., Ostermaier, B., and Adelmann, R. 2009. On the use of sensor nodes and mobile phones for the assessment of noise pollution levels in urban environments. In Proceedings of the 6th International Conference on Networked Sensing Systems. 31--38. Google ScholarGoogle ScholarDigital LibraryDigital Library
  150. Santos, A. C., Cardoso, J. M. P., Ferreira, D. R., Diniz, P. C., and Cháinho, P. 2010. Providing user context for mobile and social networking applications. Perv. Mobile Comput. 6, 324--341. Google ScholarGoogle ScholarDigital LibraryDigital Library
  151. Santos, A. C., Tarrataca, L., Cardoso, J. M. P., Ferreira, D. R., Diniz, P. C., and Chainho, P. 2009. Context inference for mobile applications in the UPCASE project. In Proceedings of the MobileWireless Middleware, Operating Systems, and Applications, J. Bonnin, C. Giannelliand, and T. Magedanz, Eds., Lecture Notes of the Institute for Computer Sciences, Social Information and Telecommunications Engineering, vol. 7, Springer Berlin Heidelberg, 352--365.Google ScholarGoogle Scholar
  152. Sashima, A., Inoue, Y., Ikeda, T., Yamashita, T., and Kurumatani, K. 2008. CONSORTS-S: A mobile sensing platform for context-aware services. In Proceedings of the International Conference on Intelligent Sensors, Sensor Networks and Information Processing (ISSNIP'08). 417--422.Google ScholarGoogle Scholar
  153. Saunders, J. 1996. Real-time discrimination of broadcast speech/music. In Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing, (CASSP'96), vol. 2, 993--996. Google ScholarGoogle ScholarDigital LibraryDigital Library
  154. Scheirer, E. and Slaney, M. 1997. Construction and evaluation of a robust multifeature speech/music discriminator. In Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing. (ICASSP'97). vol. 2, 1331--1334. Google ScholarGoogle ScholarDigital LibraryDigital Library
  155. Schiller, J. 2003. Mobile Communications. Pearson, Harlow, Essex.Google ScholarGoogle Scholar
  156. Sekine, M., Tamura, T., Akay, M., Fujimoto, T., Togawa, T., and Fukui, Y. 2002. Discrimination of walking patterns using wavelet-based fractal analysis. IEEE Trans. Neural Syst. Rehab. Eng. 10, 188--196.Google ScholarGoogle ScholarCross RefCross Ref
  157. Sekine, M., Tamura, T., Fujimoto, T., and Fukui, Y. 2000. Classification of walking pattern using acceleration waveform in elderly people. In Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society. vol. 2, 1356--1359.Google ScholarGoogle Scholar
  158. Siewiorek, D., Smailagic, A., Furukawa, J., Krause, A., Moraveji, N., Reiger, K., Shaffer, J., and Wong, F. L. 2003. SenSay: A context-awaremobile phone. In Proceedings of the 7th IEEE International Symposium on Wearable Computers. 248--249. Google ScholarGoogle ScholarDigital LibraryDigital Library
  159. Sohn, T., Li, K. A., Lee, G., Smith, I., Scott, J., and Griswold, W. G. 2005. Place-its: A study of location-based reminders on mobile phones. In Proceedings of the 5th International Conference on Ubiquitous Computing (Ubicomp'05). 232--50. Google ScholarGoogle ScholarDigital LibraryDigital Library
  160. Sohn, T., Varshavsky, A., Lamarca, A., Chen, M., Choudhury, T., Smith, I., Consolvo, S., Hightower, J., Griswold, W. G., and De Lara, E. 2006. Mobility detection using everyday GSM traces. In Proceedings of the 8th International Conference on Ubiquitous Computing (UbiComp). 212--24. Google ScholarGoogle ScholarDigital LibraryDigital Library
  161. STMicroelectronics. http://www.st.com/stonline/products/literature/ds/12726/lis302dl.htm. (Last accessed 6/10).Google ScholarGoogle Scholar
  162. Stiefmeier, T., Roggen, D., Troster, G., Ogris, G., and Lukowicz, P. 2008. Wearable activity tracking in car manufacturing. IEEE Perv. Comput. 7, 42--50. Google ScholarGoogle ScholarDigital LibraryDigital Library
  163. Sun, M. and Hill, J. O. 1993. A method for measuring mechanical work and work efficiency during human activities. J. Biomech. 26, 229--241.Google ScholarGoogle ScholarCross RefCross Ref
  164. Suh, Y., Shin, C., and Woo, W. 2009. A mobile phone guide: spatial, personal, and social experience for cultural heritage. IEEE Trans. on Consumer Electron. 55, 2356--2364. Google ScholarGoogle ScholarDigital LibraryDigital Library
  165. Takacs, G., Chandrasekhar, V., Gelfand, N., Xiong, Y., Chen, W., Bismpigiannis, T., Grzeszczuk, R., Pulli, K., and Girod, B. 2008. Outdoors augmented reality on mobile phone using loxel-based visual feature organization. In Proceeding of the 1st ACM International Conference on Multimedia Information Retrieval. 427--434. Google ScholarGoogle ScholarDigital LibraryDigital Library
  166. Titterton, D. H. and Weston, J. L. 2002. Strapdown Inertial Navigation Technology 2nd Ed. Institution of Electrical Engineers, NewYork, NY.Google ScholarGoogle Scholar
  167. Vahdatpour, A., Amini, N., and Sarrafzadeh, M. 2011. On-body device localization for health and medical monitoring applications. In Proceeding of the IEEE International Conference on Pervasive Computing and Communications (PerCom). 37--44. Google ScholarGoogle ScholarDigital LibraryDigital Library
  168. Vahdatpour, A., Amini, N., and Sarrafzadeh, M. 2009. Toward unsupervised activity discovery using multi-dimensional motif detection in time series. In Proceedings of the 21st International Conference on Artificial Intelligence. 1261--1266. Google ScholarGoogle ScholarDigital LibraryDigital Library
  169. Vieira, M. R., Frías-Martínez, E., Bakalov, P., Frías-Martínez, V., and Tsotras, V. J. 2010. Querying spatio-temporal patterns in mobile phone-call databases. In Proceeding of the 11th International Conference on Mobile Data Management (MDM). 239--248. Google ScholarGoogle ScholarDigital LibraryDigital Library
  170. Vinciarelli, A., Pantic, M., and Bourland, H. 2009. Social signal processing: Survey of an emerging domain. Image Vision Comput. 27, 12, 1743--59. Google ScholarGoogle ScholarDigital LibraryDigital Library
  171. Wagner, D., Reitmayr, G., Mulloni, A., Drummond, T., and Schmalstieg, D. 2010. Real-time detection and tracking for augmented reality on mobile phones. IEEE Trans. Visual. Comput. Graphics 16, 355--368. Google ScholarGoogle ScholarDigital LibraryDigital Library
  172. Wang, J., Zhai, S., and Canny, J. 2006. Camera phone based motion sensing: Interaction techniques, applications and performance study. In Proceedings of the 19th Annual ACM Symposium on User Interface Software and Technology. 101--110. Google ScholarGoogle ScholarDigital LibraryDigital Library
  173. Wang, Y., Lin, J., Annavaram, M., Jacobson, Q. A., Hong, J., Krishnamachari, B., and Sadeh, N. 2009. A framework of energy efficient mobile sensing for automatic user state recognition. In Proceedings of the 7th International Conference on Mobile Systems, Applications, and Services. 179--192. Google ScholarGoogle ScholarDigital LibraryDigital Library
  174. Webb, A. 1999. Statistical Pattern Recognition. John Wiley & Sons, Chichester, West Sussex.Google ScholarGoogle Scholar
  175. Wittke, M., Jänen, U., Duraslan, A., Cakar, E., Steinberg, M., and Brehm, J. 2009. Activity recognition using optical sensors on mobile phones. In Proceeding of the GI-Tagung Informatik, S. Fischer, E. Maehle, and R. Reischuk, Eds. 2181--2194.Google ScholarGoogle Scholar
  176. Woodman, O. J. 2007. An introduction to inertial navigation. Tech. report. University of Cambridge. ISSN: 1476-2986.Google ScholarGoogle Scholar
  177. Wu, J. K., Dong, L., and Xiao, W. 2007. Real-time physical activity classification and tracking using wearble sensors. In Proceeding of the 6th International Conference on Information, Communications & Signal Processing. 1--6.Google ScholarGoogle Scholar
  178. Xsens. 2011. Xsens MTi: Miniature AHRS - Attitude and Heading Sensor - Xsens. http://www.xsens.com/en/general/mti. (Last accessed 10/11).Google ScholarGoogle Scholar
  179. Yang, J. 2009. Toward physical activity diary: Motion recognition using simple acceleration features with mobile phones. In Proceedings of the 1st International Workshop on Interactive Multimedia for Consumer Electronics. 1--10. Google ScholarGoogle ScholarDigital LibraryDigital Library
  180. Ye, N. 2004. The Hand Book of Data Mining. Lawrence Erlbaurm Associates, Mahwah, NJ.Google ScholarGoogle Scholar
  181. Yi, J. S., Choi, Y. S., Jacko, J. A., and Sears, A. 2005. Context awareness via a single device-attached accelerometer during mobile computing. In Proceedings of the 7th International Conference on Human Computer Interaction with Mobile Devices & Services. 303--306. Google ScholarGoogle ScholarDigital LibraryDigital Library
  182. Yim, Y. 2003. The state of cellular probs. Berkeley. California Partners for Advanced Transit and Highways (PATH), Institute of Transportation Studies, ISSN:1055-1425.Google ScholarGoogle Scholar
  183. Yim, Y. and Cayford, R. 2001. Investigation of vehicles as probes using global positioning system and cellular phone tracking. California Partners for Advanced Transit and Highways (PATH), Institute of Transportation Studies, Berkeley. ISSN: 1055--1417.Google ScholarGoogle Scholar
  184. Zhang, Y.-Y., Zhang, W.-G., Zhao, X.-X., and Yman, H.-M. 2009. Study on electronic image stabilization system based on MEMS gyro. In Proceeding of the International Conference on Electronic Computer Technology. 641--643. Google ScholarGoogle ScholarDigital LibraryDigital Library
  185. Zhao, Y. 2000. Mobile phone location determination and its impact on intelligent transportation systems. IEEE Trans. Intell. Transport. Syst. 1, 55--64. Google ScholarGoogle ScholarDigital LibraryDigital Library
  186. Zhang, S., Yuan, C., and Zhang, Y. 2008. Handwritten character recognition using orientation quantization based on 3D accelerometer. In Proceedings of the 5th Annual International Conference on Mobile and Ubiquitous Systems: Computing, Networking, and Services. 54:1--54:6. Google ScholarGoogle ScholarDigital LibraryDigital Library
  187. Zinnen, A., Blanke, U., and Schiele, B. 2009a. An analysis of sensor-oriented vs. model-based activity recognition. In Proceeding of the International Symposium on Wearable Computers (ISWC'09). 93--100. Google ScholarGoogle ScholarDigital LibraryDigital Library
  188. Zinnen, A., Wojek, C., and Schiele, B. 2009b. Multi activity recognition based on bodymodel-derived primitives. In Proceedings of the 4th International Symposium on Location and Context Awareness. 1--18. Google ScholarGoogle ScholarDigital LibraryDigital Library
  189. Zulkefly, S. N. and Baharudin, R. 2009. Mobile phone use amongst students in a university in malaysia: Its correlates and relationship to psychological health. Euro. J. Sci. Res. 37, 2, 206--18.Google ScholarGoogle Scholar

Index Terms

  1. A survey on smartphone-based systems for opportunistic user context recognition

            Recommendations

            Reviews

            Angelica de Antonio

            This comprehensive and detailed review of existing approaches and techniques for opportunistic user context recognition concentrates on methods that operate autonomously. The approach proposed in this paper focuses on mobile phone-centric methodologies. The analysis follows three main process stages: sensing, preprocessing, and context recognition. For the sensing stage, the authors explore three main types of sensors-inertial, positioning, and ambient-and describe how they work, the types of information they can provide, their strengths and weaknesses, and how they have been applied in context recognition systems for mobile phones. The section devoted to preprocessing presents different approaches for filtering and converting raw sensor data into a finite set of features for further analysis. After a discussion of calibration methods to address the effects of variable device position and orientation on the measurements provided by sensors, the authors describe the types of features that can be generated from raw data (time domain, frequency domain, and heuristic features), organized around the types of contexts that can be inferred from them (user physical activity, social interactions, and environment). Finally, the classification algorithms that have been employed to infer the user context from the input features on mobile devices are analyzed. Five discriminative models and three generative models are described; their advantages, drawbacks, and challenges are highlighted. The paper closes with a reflective comparison of different approaches and the identification of future research challenges and recommendations. Extensive references to relevant literature appear throughout the survey, making this paper an excellent overview of the field and a perfect starting point for readers interested in exploring it in depth. Online Computing Reviews Service

            Access critical reviews of Computing literature here

            Become a reviewer for Computing Reviews.

            Comments

            Login options

            Check if you have access through your login credentials or your institution to get full access on this article.

            Sign in

            Full Access

            • Published in

              cover image ACM Computing Surveys
              ACM Computing Surveys  Volume 45, Issue 3
              June 2013
              575 pages
              ISSN:0360-0300
              EISSN:1557-7341
              DOI:10.1145/2480741
              Issue’s Table of Contents

              Copyright © 2013 ACM

              Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

              Publisher

              Association for Computing Machinery

              New York, NY, United States

              Publication History

              • Published: 3 July 2013
              • Accepted: 1 November 2011
              • Revised: 1 July 2011
              • Received: 1 January 2011
              Published in csur Volume 45, Issue 3

              Permissions

              Request permissions about this article.

              Request Permissions

              Check for updates

              Qualifiers

              • research-article
              • Research
              • Refereed

            PDF Format

            View or Download as a PDF file.

            PDF

            eReader

            View online with eReader.

            eReader