added activity to related work

tex_review/egbib.bib

@@ -3527,4 +3527,140 @@ number={},
 pages={1-8},
 IGNOREmonth={Oct},}
 
+@article{xia2015using,
+  title={{Using Multiple Barometers to Detect the Floor Location of Smart Phones with built-in Barometric Sensors for Indoor Positioning}},
+  author={Xia, Hao and Wang, Xiaogang and Qiao, Yanyou and Jian, Jun and Chang, Yuanfei},
+  journal={Sensors},
+  volume={15},
+  number={4},
+  pages={7857--7877},
+  year={2015},
+  publisher={Multidisciplinary Digital Publishing Institute}
+}
+
+@inproceedings{li2013using,
+  title={{Using Barometers to Determine the Height for Indoor Positioning}},
+  author={Li, Binghao and Harvey, Bruce and Gallagher, Thomas},
+  booktitle={Indoor Positioning and Indoor Navigation (IPIN), 2013 International Conference on},
+  pages={1--7},
+  year={2013},
+  organization={IEEE}
+}
+
+@article{zheng20163d,
+  title={{A 3D Indoor Positioning System based on Low-Cost MEMS Sensors}},
+  author={Zheng, Lingxiang and Zhou, Wencheng and Tang, Weiwei and Zheng, Xianchao and Peng, Ao and Zheng, Huiru},
+  journal={Simulation Modelling Practice and Theory},
+  volume={65},
+  pages={45--56},
+  year={2016},
+  publisher={Elsevier}
+}
+
+
+@inproceedings{moder20143d,
+  title={{3D Indoor Positioning with Pedestrian Dead Reckoning and Activity Recognition based on Bayes Filtering}},
+  author={Moder, Thomas and Hafner, Petra and Wisiol, Karin and Wieser, Manfred},
+  booktitle={Indoor positioning and indoor navigation (IPIN), 2014 international conference on},
+  pages={717--720},
+  year={2014},
+  organization={IEEE}
+}
+
+@article{tian2015smartphone,
+  title={{Smartphone-Based Indoor Integrated WiFi/MEMS Positioning Algorithm in a Multi-Floor Environment}},
+  author={Tian, Zengshan and Fang, Xin and Zhou, Mu and Li, Lingxia},
+  journal={Micromachines},
+  volume={6},
+  number={3},
+  pages={347--363},
+  year={2015},
+  publisher={Multidisciplinary Digital Publishing Institute}
+}
+
+@INPROCEEDINGS{moder15,
+author={T. Moder and K. Wisiol and P. Hafner and M. Wieser},
+booktitle={2015 International Conference on Indoor Positioning and Indoor Navigation (IPIN)},
+title={Smartphone-Based Indoor Positioning Utilizing Motion Recognition},
+year={2015},
+volume={},
+number={},
+pages={1-8},
+ISSN={},
+IGNOREmonth={Oct},}
+
+@article{shoaib2015survey,
+  title={{A Survey of Online Activity Recognition using Mobile Phones}},
+  author={Shoaib, Muhammad and Bosch, Stephan and Incel, Ozlem and Scholten, Hans and Havinga, Paul},
+  journal={Sensors},
+  volume={15},
+  number={1},
+  pages={2059--2085},
+  year={2015},
+  publisher={Multidisciplinary Digital Publishing Institute}
+}
+
+@article{lee2002activity,
+  title={{Activity and Location Recognition using Wearable Sensors}},
+  author={Lee, Seon-Woo and Mase, Kenji},
+  journal={IEEE pervasive computing},
+  volume={1},
+  number={3},
+  pages={24--32},
+  year={2002},
+  publisher={IEEE}
+}
+
+@inproceedings{lee2001recognition,
+  title={{Recognition of Walking Behaviors for Pedestrian Navigation}},
+  author={Lee, Seon-Woo and Mase, Kenji},
+  booktitle={Control Applications, 2001.(CCA'01). Proceedings of the 2001 IEEE International Conference on},
+  pages={1152--1155},
+  year={2001},
+  organization={IEEE}
+}
+
+@article{sekine2000classification,
+  title={{Classification of Waist-Acceleration Signals in a Continuous Walking Record}},
+  author={Sekine, Masaki and Tamura, Toshiyo and Togawa, Tatsuo and Fukui, Yasuhiro},
+  journal={Medical engineering \& physics},
+  volume={22},
+  number={4},
+  pages={285--291},
+  year={2000},
+  publisher={Elsevier}
+}
+
+@article{veltink1996detection,
+  title={{Detection of Static and Dynamic Activities using Uniaxial Accelerometers}},
+  author={Veltink, Peter H and Bussmann, HansB J and De Vries, Wiebe and Martens, WimL J and Van Lummel, Rob C},
+  journal={IEEE Transactions on Rehabilitation Engineering},
+  volume={4},
+  number={4},
+  pages={375--385},
+  year={1996},
+  publisher={IEEE}
+}
+
+@inproceedings{kallmann2010navigation,
+  title={{Navigation Queries from Triangular Meshes}},
+  author={Kallmann, Marcelo},
+  booktitle={International Conference on Motion in Games},
+  pages={230--241},
+  year={2010},
+  organization={Springer}
+}
+
+@article{vatti1992generic,
+  title={{A Generic Solution to Polygon Clipping}},
+  author={Vatti, Bala R},
+  journal={Communications of the ACM},
+  volume={35},
+  number={7},
+  pages={56--63},
+  year={1992},
+  publisher={ACM}
+}
+
+