The active badge location system
ACM Transactions on Information Systems (TOIS)
The Cricket location-support system
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Smart-Its Friends: A Technique for Users to Easily Establish Connections between Smart Artefacts
UbiComp '01 Proceedings of the 3rd international conference on Ubiquitous Computing
Implementation and Evaluation of a Low-Power Sound-Based User Activity Recognition System
ISWC '04 Proceedings of the Eighth International Symposium on Wearable Computers
On location models for ubiquitous computing
Personal and Ubiquitous Computing
A relative positioning system for co-located mobile devices
Proceedings of the 3rd international conference on Mobile systems, applications, and services
OPF: a distributed context-sensing framework for ubiquitous computing environments
UCS'06 Proceedings of the Third international conference on Ubiquitous Computing Systems
Audio location: accurate low-cost location sensing
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Place lab: device positioning using radio beacons in the wild
PERVASIVE'05 Proceedings of the Third international conference on Pervasive Computing
Where am i: recognizing on-body positions of wearable sensors
LoCA'05 Proceedings of the First international conference on Location- and Context-Awareness
EURASIP Journal on Wireless Communications and Networking - Special issue on towards the connected body: advances in body communications
Context-based security: state of the art, open research topics and a case study
CASEMANS '11 Proceedings of the 5th ACM International Workshop on Context-Awareness for Self-Managing Systems
VibroTactor: low-cost placement-aware technique using vibration echoes on mobile devices
Proceedings of the companion publication of the 2013 international conference on Intelligent user interfaces companion
RoomSense: an indoor positioning system for smartphones using active sound probing
Proceedings of the 4th Augmented Human International Conference
Using RFID tags as reference for phone location and orientation in daily life
Proceedings of the 4th Augmented Human International Conference
Phoneprioception: enabling mobile phones to infer where they are kept
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
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We describe a novel method for symbolic location discovery of simple objects. The method requires no infrastructure and relies on simple sensors routinely used in sensor nodes and smart objects (acceleration, sound). It uses vibration and short, narrow frequency 'beeps' to sample the response of the environment to mechanical stimuli. The method works for specific locations such as 'on the couch', 'in the desk drawer' as well as for location classes such as 'closed wood compartment' or 'open iron surface'. In the latter case, it is capable of generalizing the classification to locations the object has not seen during training. We present the results of an experimental study with a total of over 1200 measurements from 35 specific locations (taken from 3 different rooms) and 12 abstract location classes. It includes such similar locations as the inner and outer pocket of a jacket and a table and shelf made of the same wood. Nonetheless on locations from a single room (16 in the largest one) we achieve a recognition rate of up to 96 %. It goes down to 81 % if all 35 locations are taken together, however the correct location is in the 3 top picks of the system 94 % of the times.