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Auteur Joachim Baldegger
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Verbale Selektion von räumlichen Objekten - ein benutzerorientierter Ansatz für mobile Systeme auf Basis von Ontologien / Joachim Baldegger (2005)
Titre : Verbale Selektion von räumlichen Objekten - ein benutzerorientierter Ansatz für mobile Systeme auf Basis von Ontologien Titre original : [Une sélection verbale des objets géographiques : une conception orientée vers l'utilisateur pour un système mobile sur la base d'une ontologie] Type de document : Thèse/HDR Auteurs : Joachim Baldegger, Auteur Editeur : Zurich : Institut für Geodäsie und Photogrammetrie IGP - ETH Année de publication : 2005 Collection : IGP Mitteilungen, ISSN 0252-9335 num. 84 Importance : 160 p. Format : 21 x 30 cm ISBN/ISSN/EAN : 978-3-906467-49-8 Note générale : Bibliographie Langues : Allemand (ger) Descripteur : [Vedettes matières IGN] Bases de données localisées
[Termes descripteurs IGN] modèle conceptuel de données localisées
[Termes descripteurs IGN] navigation pédestre
[Termes descripteurs IGN] objet géographique
[Termes descripteurs IGN] ontologie
[Termes descripteurs IGN] représentation mentale spatiale
Résumé : (Auteur) The use of speech recognition for the design of user interfaces is an important issue due to the trend in computer sciences towards mobile applications and devices. New technologies like Ubiquitous Computing and Augmented Reality enable totally new applications. This trend is also taking part in Geographic Information Science and Technologies (GIST) since many of human acts - that could be supported by these technologies - have a strong relation to space.
In this thesis, the focus is on the development of speech-based user interface methods. An important functionality is the possibility to select spatial objects or an object space through verbal description (e.g. 'The red house near the church'). This functionality has to be supported for the use with such new applications. But there is no speech recognition software that does support such functionality, yet. With that, in the sense of the 'replacement of keyboard and mouse', today only the keyboard can be replaced totally by speech recognition. The goal of this dissertation is therefore the development of a method that enables the selection of a spatial object in a database through verbal description of the situation.
The separated analysis of the two aspects system and user is an important basis for the elaborated concept. In the case of the system, the focus is laid on the database. Here, questions about form and content of the data and the creation of a usable data basis are studied. As an example, we have chosen pedestrian navigation because it is a basic functionality for mobile information systems. In the case of the user part, the main interest is laid on the user and his verbal selection statement. It is tried to structure the effect of spatial cognition and with that, to make a first step towards a formalization of it.
Based on these considerations, the 3-step model is developed. This model enables the system to extract the target objects in the database. Basic idea is the reduction of the set with the possible target objects in three steps. Each of these steps is based on different criteria.
In the first reduction step, the objects that can be seen by the user are detected by using sensors for positioning and view direction detection. Based on the assumption that the user is only selecting objects he can sec and therefore describe, ail objects out of his visual field drop out as solutions.
The second reduction step contains the problem of the different abstractions of reality by the user and the system. Each user has his own mental model of the visible situation in his mind. This model is influenced by the visualization and the application. The data that is visualized and from which an object should be selected, is stored in a spatial database according to a certain data model. For solving the problem, we have to find a way in which these two models can be mapped onto each other. As soon as this mapping is possible, we can draw a conclusion between the mental model and the data model. Since the selection statement is nothing else than a verbalization of the user's mental model, we can also draw a conclusion between this statement and the objects in the database. With that, a connection between user statement and database has been created.
The third reduction step deals with the analysis of the spatial arrangement. For this, a concept for the verification of the applicability of 22 English relational prepositions is elaborated. We strive for simple algorithms, because the performance of mobile devices is reduced. Based on the idea that the spatial information is also contained on the level of abstraction of the screen objects, several algorithms are developed. These algorithms mainly calculate coordinate comparisons and are therefore quickly processible. During these calculations, the algorithms checks whether a possible target lays within the space of applicability for the respect relational preposition. The defined spaces of applicability indicate a region on the screen for which the detected preposition is applicable.
The elaborated rules and methods are implemented for the 2-dimensional case in prototype software. This prototype is tested with a multi-level test concept. In the operation tests, the focus is laid on indirect selection statements. Beneath this type of tests, we also conduct performance tests and verify several aspects with a questionnaire. The test stage shows that the concept for the verbal selection of spatial objects is successfully applicable and good results in selection efficiency can be achieved.
The developed selection functionality on basis of verbal description of the situation is expanding today's speech-based navigation and commanding possibilities by a spatial component. With that, a further step towards user-friendly mobile services is made.
Numéro de notice : 13288 Affiliation des auteurs : non IGN Thématique : GEOMATIQUE/INFORMATIQUE Nature : Thèse étrangère DOI : 10.3929/ethz-a-004906576 En ligne : http://dx.doi.org/10.3929/ethz-a-004906576 Format de la ressource électronique : URL Permalink :
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Code-barres Cote Support Localisation Section Disponibilité 13288-01 37.10 Livre Centre de documentation Géomatique DisponibleWearable GIS / Joachim Baldegger (24/04/2003)
contenu dans AGILE 2003, 6th Agile Conference on Geographic Information Science, Lyon, 24 - 26 April, 2003 / Michael Gould (2003)
Titre : Wearable GIS : a smart assistant in disaster management Type de document : Article/Communication Auteurs : Joachim Baldegger, Auteur ; C. Giger, Auteur Congrès : AGILE 2003, 6th International Conference on Geographic Information Science (24 - 26 avril 2003; Lyon, France), Auteur Année de publication : 24/04/2003 Importance : pp 19 - 26 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Systèmes d'information géographique
[Termes descripteurs IGN] appareil portable
[Termes descripteurs IGN] catastrophe naturelle
[Termes descripteurs IGN] positionnement par GPS
[Termes descripteurs IGN] reconnaissance de la parole
[Termes descripteurs IGN] requête spatiale
[Termes descripteurs IGN] SIG nomade
Résumé : (Auteur) The use of GIS in a broad palette of applications has been practical and successful for several years. The enormous possibilities of these systems are appreciated and have been established as decision supporting tools in many processes. Today's GIS are usually static and often used in longterm planning and administering processes. The technological development in the IT and telecommunication sector shows a clear trend towards mobile applications. Such a mobile use would also be desirable in the GIST sector and would broaden the possible fields of application for those, who are in a need for quick decisions on the spot. Numéro de notice : C2003-008 Thématique : GEOMATIQUE/INFORMATIQUE Nature : Communication Permalink :