Petr Aksenov | Universiteit Hasselt (original) (raw)

Papers by Petr Aksenov

Research paper thumbnail of O brother, where art thou located?: Raising awareness of variability in location tracking for users of location-based pervasive applications

Abstract There is a diversity of ways to determine a user's location in a pervasive environment t... more Abstract There is a diversity of ways to determine a user's location in a pervasive environment today. On a large scale, this diversity often results in variability of location tracking conditions throughout the environment. For an important class of pervasive applications, which often rely on the ubiquitous availability of location tracking–location-based pervasive applications, the consistency of their behaviour under this variability cannot be guaranteed.

Research paper thumbnail of A Unified Approach to Uncertainty-Aware Ubiquitous Localisation of Mobile Users

Abstract Localisation is a standard feature in many mobile applications today, and there are nume... more Abstract Localisation is a standard feature in many mobile applications today, and there are numerous techniques for determining a user's location both indoors and outdoors. The provided location information is often organised in a format tailored to a particular localisation system's needs and restrictions, making the use of several systems in one application cumbersome.

Research paper thumbnail of The Variability of Location Context in Pervasive Environments: Modelling, Representation and Visualisation

Context and context-awareness are crucial concepts in pervasive computing. Among the many and div... more Context and context-awareness are crucial concepts in pervasive computing. Among the many and diverse types of contextual information, information about location is generally seen as one of the most important. There is a great deal of situations the users happen to be in throughout a pervasive environment. This fact imposes restrictions on the use of the available resources and the surroundings as well as requires taking into account the users‟ personal preferences and requested customisations.

Research paper thumbnail of A unified scalable model of user localisation with uncertainty awareness for large-scale pervasive environments

Localisation has become a standard feature in many mobile applications. Numerous techniques for b... more Localisation has become a standard feature in many mobile applications. Numerous techniques for both indoor and outdoor location tracking are available today, providing a diversity of ways positioning information can be delivered to a mobile application (e.g., a location-based service). Such factors as the variation of precision over time and covered areas or the difference in quality and reliability make the adoption of several techniques for one application cumbersome. This work presents an approach that models the capabilities of localisation systems and then uses this model to build a unified view on localisation, with special attention paid to uncertainty coming from different localisation conditions and its presentation to the user. We discuss technical considerations, challenges and issues of the approach and report about a user study on users' acceptance of the suggested behaviour of an application based on the approach. The results of the study showed the feasibility of the approach and revealed users' preference towards automatic but yet informed changes they experienced while using the application.

Research paper thumbnail of Genetic algorithms for optimising chess position scoring

Master's Thesis, University of Joensuu, …, Jan 1, 2004

Research paper thumbnail of Coping with variability of location sensing in large-scale ubicomp environments

Ultra Modern Telecommunications & …

The work addresses the problem of coping with a diversity of location tracking techniques availab... more The work addresses the problem of coping with a diversity of location tracking techniques available in ubiquitous computing environments. We investigate how this diversity can be embedded in the environment in a way that typical difficulties coming from using location-awareness are hidden. We present an approach to improve location-awareness of these environments by means of integrating the knowledge about different location systems into an existing framework for designing pervasive environments in the form of an ontology. Emerging challenges are also discussed in the context of continuous and smooth communication.

Research paper thumbnail of Geo-social interaction: context-aware help in large scale public spaces

Ambient …, Jan 1, 2010

We present an approach to exploit social and spatio-temporal context in order to improve informat... more We present an approach to exploit social and spatio-temporal context in order to improve information dissemination in dynamic largescale public spaces. We illustrate it by applying a proposed measure of geo-social relevance of each individual in a simulated vehicular network and by comparing the performance of different network message passing techniques in an inter-vehicle 'help-me-best-and-do-it-fast' communication scenario. We conclude that the use of social networking capabilities of an individual combined with knowledge about their spatiotemporal context information significantly improves purposeful interaction between individuals in terms of both the efficiency of the network data dissemination and the quality of the delivered information.

Research paper thumbnail of Location-driven adaptation of user interfaces in pervasive environments

research.edm.uhasselt.be

This work aims at improving location-awareness of pervasive applications in the environments wher... more This work aims at improving location-awareness of pervasive applications in the environments where many diverse localisation systems are available. Details of localisation systems are modelled and considered with respect to reasoning about the most appropriate visualisation of an application's user interface in the given localisation conditions. The expected contribution is to make location-based pervasive applications functional throughout the entire, possibly large-scale, environment.

Research paper thumbnail of Ambient Compass: One approach to model spatial relations

Digital Human Modeling, Jan 1, 2009

The knowledge of spatial arrangements of objects is an important component for the design of migr... more The knowledge of spatial arrangements of objects is an important component for the design of migratable user interfaces that target pervasive environments. Objects in these environments are often moving around individually, which leads to a highly dynamic and unpredictable environment. Due to its nature, spatial information cannot be described exhaustively, and uncertainty and imprecision need to be taken into account during both the design phase and at runtime. We present an approach to model dynamic spatial information, providing it with the ability to interpret to some extent uncertain and imprecise knowledge. We then integrate this type of spatial-awareness into ReWiRe, a framework for designing interactive pervasive environments, in order to improve its user-interface distribution techniques.

Research paper thumbnail of Reasoning over spatial relations for context-aware distributed user interfaces

Considering the amount of devices a user owns nowadays, a distributed user interface can become i... more Considering the amount of devices a user owns nowadays, a distributed user interface can become increasingly important. This requires reasoning techniques that allow making predictions of future values in the spatial model because these devices can be expected to change their location during usage. Our primary attention will be devoted to the problem of re-distribution of user interfaces in a constantly changing environment. So that a change in spatial topology, i.e. in the way the devices are located relative to one another, will be detected on time and interpreted in a proper way, resulting in redistribution of a user interface the devices are sharing.

Research paper thumbnail of O brother, where art thou located?: Raising awareness of variability in location tracking for users of location-based pervasive applications

Abstract There is a diversity of ways to determine a user's location in a pervasive environment t... more Abstract There is a diversity of ways to determine a user's location in a pervasive environment today. On a large scale, this diversity often results in variability of location tracking conditions throughout the environment. For an important class of pervasive applications, which often rely on the ubiquitous availability of location tracking–location-based pervasive applications, the consistency of their behaviour under this variability cannot be guaranteed.

Research paper thumbnail of A Unified Approach to Uncertainty-Aware Ubiquitous Localisation of Mobile Users

Abstract Localisation is a standard feature in many mobile applications today, and there are nume... more Abstract Localisation is a standard feature in many mobile applications today, and there are numerous techniques for determining a user's location both indoors and outdoors. The provided location information is often organised in a format tailored to a particular localisation system's needs and restrictions, making the use of several systems in one application cumbersome.

Research paper thumbnail of The Variability of Location Context in Pervasive Environments: Modelling, Representation and Visualisation

Context and context-awareness are crucial concepts in pervasive computing. Among the many and div... more Context and context-awareness are crucial concepts in pervasive computing. Among the many and diverse types of contextual information, information about location is generally seen as one of the most important. There is a great deal of situations the users happen to be in throughout a pervasive environment. This fact imposes restrictions on the use of the available resources and the surroundings as well as requires taking into account the users‟ personal preferences and requested customisations.

Research paper thumbnail of A unified scalable model of user localisation with uncertainty awareness for large-scale pervasive environments

Localisation has become a standard feature in many mobile applications. Numerous techniques for b... more Localisation has become a standard feature in many mobile applications. Numerous techniques for both indoor and outdoor location tracking are available today, providing a diversity of ways positioning information can be delivered to a mobile application (e.g., a location-based service). Such factors as the variation of precision over time and covered areas or the difference in quality and reliability make the adoption of several techniques for one application cumbersome. This work presents an approach that models the capabilities of localisation systems and then uses this model to build a unified view on localisation, with special attention paid to uncertainty coming from different localisation conditions and its presentation to the user. We discuss technical considerations, challenges and issues of the approach and report about a user study on users' acceptance of the suggested behaviour of an application based on the approach. The results of the study showed the feasibility of the approach and revealed users' preference towards automatic but yet informed changes they experienced while using the application.

Research paper thumbnail of Genetic algorithms for optimising chess position scoring

Master's Thesis, University of Joensuu, …, Jan 1, 2004

Research paper thumbnail of Coping with variability of location sensing in large-scale ubicomp environments

Ultra Modern Telecommunications & …

The work addresses the problem of coping with a diversity of location tracking techniques availab... more The work addresses the problem of coping with a diversity of location tracking techniques available in ubiquitous computing environments. We investigate how this diversity can be embedded in the environment in a way that typical difficulties coming from using location-awareness are hidden. We present an approach to improve location-awareness of these environments by means of integrating the knowledge about different location systems into an existing framework for designing pervasive environments in the form of an ontology. Emerging challenges are also discussed in the context of continuous and smooth communication.

Research paper thumbnail of Geo-social interaction: context-aware help in large scale public spaces

Ambient …, Jan 1, 2010

We present an approach to exploit social and spatio-temporal context in order to improve informat... more We present an approach to exploit social and spatio-temporal context in order to improve information dissemination in dynamic largescale public spaces. We illustrate it by applying a proposed measure of geo-social relevance of each individual in a simulated vehicular network and by comparing the performance of different network message passing techniques in an inter-vehicle 'help-me-best-and-do-it-fast' communication scenario. We conclude that the use of social networking capabilities of an individual combined with knowledge about their spatiotemporal context information significantly improves purposeful interaction between individuals in terms of both the efficiency of the network data dissemination and the quality of the delivered information.

Research paper thumbnail of Location-driven adaptation of user interfaces in pervasive environments

research.edm.uhasselt.be

This work aims at improving location-awareness of pervasive applications in the environments wher... more This work aims at improving location-awareness of pervasive applications in the environments where many diverse localisation systems are available. Details of localisation systems are modelled and considered with respect to reasoning about the most appropriate visualisation of an application's user interface in the given localisation conditions. The expected contribution is to make location-based pervasive applications functional throughout the entire, possibly large-scale, environment.

Research paper thumbnail of Ambient Compass: One approach to model spatial relations

Digital Human Modeling, Jan 1, 2009

The knowledge of spatial arrangements of objects is an important component for the design of migr... more The knowledge of spatial arrangements of objects is an important component for the design of migratable user interfaces that target pervasive environments. Objects in these environments are often moving around individually, which leads to a highly dynamic and unpredictable environment. Due to its nature, spatial information cannot be described exhaustively, and uncertainty and imprecision need to be taken into account during both the design phase and at runtime. We present an approach to model dynamic spatial information, providing it with the ability to interpret to some extent uncertain and imprecise knowledge. We then integrate this type of spatial-awareness into ReWiRe, a framework for designing interactive pervasive environments, in order to improve its user-interface distribution techniques.

Research paper thumbnail of Reasoning over spatial relations for context-aware distributed user interfaces

Considering the amount of devices a user owns nowadays, a distributed user interface can become i... more Considering the amount of devices a user owns nowadays, a distributed user interface can become increasingly important. This requires reasoning techniques that allow making predictions of future values in the spatial model because these devices can be expected to change their location during usage. Our primary attention will be devoted to the problem of re-distribution of user interfaces in a constantly changing environment. So that a change in spatial topology, i.e. in the way the devices are located relative to one another, will be detected on time and interpreted in a proper way, resulting in redistribution of a user interface the devices are sharing.