Showing papers by "Hans Gellersen published in 2006"

Long term activity monitoring with a wearable sensor node

Abstract: This paper introduces an encapsulated sensor node that is devised to monitor and record motion patterns over long, quotidian periods of time with potential application in psychological studies. Its design fuses different sensing modalities to allow efficient capturing of tilt and acceleration stimuli, as well as embedded algorithms that abstract from the raw sensory data to indicative features. By combining tilt switches and accelerometers with customized processing techniques, it is argued that a power-efficient yet information-rich approach is reached for the observation and logging of human motion-based activity.

An Authentication Protocol using Ultrasonic Ranging

Abstract: Lancaster University, Infolab21, South Drive, Lancaster, LA1 4WA, UK{rene,hazas,hwg}@comp.lancs.ac.uk,WWW home page: http://ubicomp.lancs.ac.uk/Abstract. This report presents a method for establishing and secur-ing spontaneous interactions on the basis of spatial references which areobtained by accurate sensing of relative device positions. Utilising theRelate ultrasonic sensing system, we construct an interlocked protocolusing radio frequency messages and ultrasonic pulses for verifying thattwo devices share a secret. This verification is necessary to prevent man-in-the-middle attacks on standard Diffie-Hellman key agreement.

The VoodooIO gaming kit: a real-time adaptable gaming controller

Abstract: Existing gaming controllers are limited in their end-user configurability. As a complement to current game control technology, we present the VoodooIO Gaming Kit, a real-time adaptable gaming controller. We introduce the concept of appropriable gaming devices, which allow players to define and actively reconfigure their gaming space, making it appropriate to their personal preference and gaming needs. The technology and its conceived usage are illustrated through its application to two commercially available computer games, as well as through the results of a formal user study.

A Position DetectionMechanism for Location-aware Pin&Play

Abstract: We propose a position detection mechanism for locationaware Pin&Play. Though the positions of inserted pins are important for most applications, they could not be detected in previous systems. The proposed method detects the positions of pins by processing images taken with a camera placed in front of the board. The proposed method has a dynamic adjustment mechanism for image processing parameters to achieve higher accuracy even when the surrounding lighting condition changes. Moreover, it also has an error estimation mechanism to avoid the accumulation of position error. We also clarify the effectiveness of our proposed method through performance evaluations.

Fair Dice: A Tilt and Motion-Aware Cube with a Conscience

Abstract: As an example of sensory augmentation of a tiny object, a small cube-sized die is presented that perceives rolls and records what face it lands on. It is thus able to detect bias for unfair behaviour due to its physical imperfections. On a deeper level, this case study demonstrates the integration of energy-efficient sensor fusion, combination of classifiers, and a wireless interface to adaptive classification heuristics.

Cooperatively Augmenting Smart Objects with Projector-Camera Systems

Abstract: In this paper we propose an object-centric method of augmenting mobile smart objects using projection onto the surface of the objects. We assume that the objects are both real world objects with an inherent use, and autonomous computational nodes that can communicate with the environment in real time. We investigate how an object’s capability for self description and sensing can be used in cooperation with a projector-camera system’s vision capability to help locate, track and display information onto object surfaces in an unconstrained environment without using markers.

The Friday Afternoon Project: A Two-Hour VoodooIO Prototyping Exercise.

Abstract: VoodooIO is a new architecture for physical user interfaces, providing interface devices that can be flexibly arranged on an interactive substrate. The architecture supports rapid assembly of physical interfaces and dynamic rearrangement of devices. In this paper we provide an account of a case study in which VoodooIO was used to rapidly build and explore a physical interface to an existing application, Google Earth. The case study gives insight into VoodooIO’s support for rapid prototyping of physical user interface applications.

Distributed and Adaptable Home Control Interface with VoodooIO

Abstract: We propose to demonstrate a novel type of physical interface for home control based on the VoodooIO architecture. The system is targeted at home environments that are rich in networked appliances and devices that can be remotely operated. The aim is to allow users to define and maintain a single coherent interface, which provides effective control of the collective functionality of their home.