Deutsche Telekom

About: Deutsche Telekom is a company organization based out in Welwyn Garden City, United Kingdom. It is known for research contribution in the topics: Telecommunications network & Terminal (electronics). The organization has 3473 authors who have published 5208 publications receiving 65429 citations. The organization is also known as: DTAG & German Telecom.

MagiWrite: towards touchless digit entry using 3D space around mobile devices

Abstract: In this work, we present a new approach for text (mainly digit) entry based on digit shaped gestures created in 3D space around a mobile device. Some new mobile devices such as Apple iPhone 3GS and Google Android are equipped with magnetic (compass) sensor. The main idea is to influence the magnetic sensor using a magnet taken in hand. The user draws (writes) digits in the 3D space around the device using the magnet taken in hand. Movement of the magnet changes temporal pattern of magnetic field around the device which is sensed and registered by the magnetic (compass) sensor. The registered pattern is then compared against already recorded templates for different digits. Such a text (digit) entry approach can be especially useful for small mobile devices in which it is hard to operate small buttons or touch screen. Using our technique, the text entry space extends beyond physical boundaries of the device. A demonstrator for this approach is implemented on Apple iPhone 3GS platform. It demonstrates registering a few templates for different digits, and recognizing digits written in the space around the device

CaMus: live music performance using camera phones and visual grid tracking

Abstract: We demonstrate that mobile phones can be used as an actively oriented handheld musical performance device. To achieve this we use a visual tracking system of a camera phone. Motion in the plane, relative to movable targets, rotation and distance to the plane can be used to drive MIDI enabled sound generation software or hardware. Mobile camera phones are widely available technology and we hope to find ways to make them into viable and widely used performance devices.

AGGREGATION ERROR EFFECTS ON THE DISCRETE-SPACE p-MEDIAN MODEL: THE CASE OF EDMONTON, CANADA

Abstract: The spatial analysis literature recognizes three sources of aggregation error, termed Source A, Source B, and Source C, which affect models relying on distance measurements between populations and facilities. We consider these effects with respect to aggregating from census enumeration areas to census tracts, on a popular location model. We identify a further source of aggregation error, which we dub Source D error, arising from the representation of facility sites by discrete points. Source D effects are of the same magnitude as Source A and B combined, much greater than Source C effects. Source D error is further significant, because, unlike Source A and B error, it can be eliminated only by disaggregating. La litterature sur Vanalyse spatiale reconnait trois sources d'erreur d'agregation appelees erreurs de source A, B, et C. Ces erreurs influencent les modeles qui reposent sur des mesures de distance entre des populations et des installations. On considere les effets d'agregation des secteurs de denombrement en secteurs de recensement sur un modele de localisation courant. On identifie une quatrieme source d'erreur d'agregation appelee erreur de source D. Cette erreur decoule de la representation des sites des installations par des points discrets. Ses effets sont du meme ordre de grandeur que ceux des sources A et B combinees et beaucoup plus grands que les effets de source G. L'erreur de source D est d'autant plus significative a cause du fait que, contrairement aux erreurs de source A et B, elle ne peut etre eliminee que par la desagregation.

CARMEN: Delivering carrier grade services over wireless mesh networks

Abstract: Current Internet use is evolving, users are becoming mobile and are expecting data services on the go. This fact presents big challenges and opportunities to operators, which see the increase in data services as a big market still to be exploited. However, current cellular technologies cannot accommodate the demand that will arise when the true mobile Internet evolves. Addressing these challenges, we present the CARMEN project, the vision of which is to extend operatorspsila infrastructure by providing carrier grade services through a heterogeneous wireless mesh. The CARMEN architecture will provide enough bandwidth to cope with userspsila expectations at a reduced cost, thereby generating major benefits to operators and users.