Pub Date : 2016-11-20DOI: 10.5220/0002500000870092
T. Romão, Luís Rato, Pedro Fernandes, Nuno Alexandre, Antão Almada, Nuno Capeta
CITI/FCT/UNL - Quinta da Torre, 2829-516 Caparica, PortugalAbstract. This paper presents Mobile Traffic (M-Traffic), a multiplat-form online traffic information system, which provides real time trafficinformation based on image processing, sensor’s data and traveller be-haviour models. In order to estimate route delay and feed the optimalrouting algorithm a traffic microscopic simulation model is developed andsimulation results are presented. This mobile information service ubiqui-tously provides users with traffic information regarding their needs andpreferences, according to an alert system, which allows a personalisedpre-definition of warning messages.
CITI/FCT/UNL - Quinta da Torre, 2829-516 Caparica，葡萄牙本文提出了一种基于图像处理、传感器数据和行人行为模型的多平台在线交通信息系统——移动交通(M-Traffic)。为了估计路由延迟并提供最优路由算法，建立了交通微观仿真模型，并给出了仿真结果。根据警报系统，这种移动信息服务无处不在地为用户提供有关其需求和偏好的交通信息，该系统允许个性化预定义警告信息。
{"title":"M-Traffic - A Traffic Information and Monitoring System for Mobile Devices","authors":"T. Romão, Luís Rato, Pedro Fernandes, Nuno Alexandre, Antão Almada, Nuno Capeta","doi":"10.5220/0002500000870092","DOIUrl":"https://doi.org/10.5220/0002500000870092","url":null,"abstract":"CITI/FCT/UNL - Quinta da Torre, 2829-516 Caparica, PortugalAbstract. This paper presents Mobile Traffic (M-Traffic), a multiplat-form online traffic information system, which provides real time trafficinformation based on image processing, sensor’s data and traveller be-haviour models. In order to estimate route delay and feed the optimalrouting algorithm a traffic microscopic simulation model is developed andsimulation results are presented. This mobile information service ubiqui-tously provides users with traffic information regarding their needs andpreferences, according to an alert system, which allows a personalisedpre-definition of warning messages.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128059108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2007-08-04DOI: 10.5220/0002672701950203
Christian Hutter, Matthias R. Brust, S. Rothkugel
Ubiquitous computing based on small mobile devices using wireless communication links is becoming very attractive. The computational power and storage capacities provided allow the execution of sophisticated applications. Due to the fact that sharing of information is a central problem for distributed applications, the development of self organizing middleware services providing high level interfaces for information managing is essential. ADS is a directory service for mobile ad-hoc networks dealing with local and nearby information as well as providing access to distant information. The approach discussed throughout this paper is based upon the concept of information markets.
{"title":"ADS-Directory Services for Mobile Ad-Hoc Networks Based on an Information Market Model","authors":"Christian Hutter, Matthias R. Brust, S. Rothkugel","doi":"10.5220/0002672701950203","DOIUrl":"https://doi.org/10.5220/0002672701950203","url":null,"abstract":"Ubiquitous computing based on small mobile devices using wireless communication links is becoming very attractive. The computational power and storage capacities provided allow the execution of sophisticated applications. Due to the fact that sharing of information is a central problem for distributed applications, the development of self organizing middleware services providing high level interfaces for information managing is essential. ADS is a directory service for mobile ad-hoc networks dealing with local and nearby information as well as providing access to distant information. The approach discussed throughout this paper is based upon the concept of information markets.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133093269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2005-04-01DOI: 10.5220/0002573800030018
P. D. Costa, L. F. Pires, M. V. Sinderen
Architectural patterns have been proposed in many domains as means of capturing recurring design problems that arise in specific design situations. In this paper, we present three architectural patterns that can be applied beneficially in the development of context-aware services platforms. These patterns present solutions for recurring problems associated with managing context information and proactively reacting upon context changes. We demonstrate the benefits of applying these patterns by discussing the AWARENESS architecture.
{"title":"Architectural Patterns for Context-Aware Services Platforms","authors":"P. D. Costa, L. F. Pires, M. V. Sinderen","doi":"10.5220/0002573800030018","DOIUrl":"https://doi.org/10.5220/0002573800030018","url":null,"abstract":"Architectural patterns have been proposed in many domains as means of capturing recurring design problems that arise in specific design situations. In this paper, we present three architectural patterns that can be applied beneficially in the development of context-aware services platforms. These patterns present solutions for recurring problems associated with managing context information and proactively reacting upon context changes. We demonstrate the benefits of applying these patterns by discussing the AWARENESS architecture.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125886179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-04-13DOI: 10.5220/0002679601190128
Helder Pinto, R. Jose
Users moving between different ubiquitous computing environments should be able to take a full profit of the resources existent there, if their home environment (e.g. a mobile portal) could seamlessly integrate with local infrastructure. Pursuing such goal, this paper focuses on the aspects of integrating local applications and services into an external user home environment, with particular emphasis on the interoperability and performance issues. Based on the concept of Value ADded Environment (VADE), as an administrative and physical domain, where the locally available facilities can be combined with external user home environments, the paper presents a middleware solution supporting the integration of local services and applications available in VADE environments into an external portal.
{"title":"Integrating local services and applications into external user home environments","authors":"Helder Pinto, R. Jose","doi":"10.5220/0002679601190128","DOIUrl":"https://doi.org/10.5220/0002679601190128","url":null,"abstract":"Users moving between different ubiquitous computing environments should be able to take a full profit of the resources existent there, if their home environment (e.g. a mobile portal) could seamlessly integrate with local infrastructure. Pursuing such goal, this paper focuses on the aspects of integrating local applications and services into an external user home environment, with particular emphasis on the interoperability and performance issues. Based on the concept of Value ADded Environment (VADE), as an administrative and physical domain, where the locally available facilities can be combined with external user home environments, the paper presents a middleware solution supporting the integration of local services and applications available in VADE environments into an external portal.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"69 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113961098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5220/0002674600730082
P. Mihailescu, Habin Lee, J. Shepherdson
With the advent of the Java 2 Micro Edition platform, developers have the ability to develop Java based mobile applications that benefit from features such as device independence, and memory abstraction. However, applications also inherit many limitations such as slow execution, and excessive memory usage that impact on overall application performance and usability. The aim of this paper is to present and evaluate six known optimisation techniques for improving the performance and usability of Java based mobile applications. Some of these techniques are dependent on features provided within the IBM WebSphere Studio Device Developer IDE. A real life multi-agent based mobile application is presented to demonstrate the performance and usability improvements that have been gained through applying these optimisation techniques.
随着Java 2 Micro Edition平台的出现，开发人员有能力开发基于Java的移动应用程序，这些应用程序受益于设备独立性和内存抽象等特性。但是，应用程序也继承了许多限制，例如执行缓慢和内存使用过多，这会影响应用程序的整体性能和可用性。本文的目的是介绍和评估六种已知的优化技术，以提高基于Java的移动应用程序的性能和可用性。其中一些技术依赖于IBM WebSphere Studio Device Developer IDE中提供的功能。本文给出了一个真实的基于多智能体的移动应用程序，以演示通过应用这些优化技术获得的性能和可用性改进。
{"title":"Hold the Sources: A Gander At J2ME Optimisation Techniques","authors":"P. Mihailescu, Habin Lee, J. Shepherdson","doi":"10.5220/0002674600730082","DOIUrl":"https://doi.org/10.5220/0002674600730082","url":null,"abstract":"With the advent of the Java 2 Micro Edition platform, developers have the ability to develop Java based mobile applications that benefit from features such as device independence, and memory abstraction. However, applications also inherit many limitations such as slow execution, and excessive memory usage that impact on overall application performance and usability. The aim of this paper is to present and evaluate six known optimisation techniques for improving the performance and usability of Java based mobile applications. Some of these techniques are dependent on features provided within the IBM WebSphere Studio Device Developer IDE. A real life multi-agent based mobile application is presented to demonstrate the performance and usability improvements that have been gained through applying these optimisation techniques.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"11 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114111513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5220/0002478000210028
N. Petrellis, Nikos Konofaos, G. Alexiou
The location of the position of a moving target on a grid plane is studied in this paper. The estimation method is based on encountering the number of infrared patterns that arrive to the target as expected, unexpected or out of order. Since the position of the target is not determined by an analog signal intensity, no high precision sensors and measurements are required and the coordinate estimation can be carried out by a pair of transmitters and a pair of sensors on the moving target. The speed of the estimation is adjustable according to the desired accuracy. An error of less than 5% can be reached in most of the covered area. The presented system can be used in a number of automation, robotics, virtual reality and ubiquitous applications.
{"title":"Position Estimation on a Grid, Based on Infrared Pattern Reception Features","authors":"N. Petrellis, Nikos Konofaos, G. Alexiou","doi":"10.5220/0002478000210028","DOIUrl":"https://doi.org/10.5220/0002478000210028","url":null,"abstract":"The location of the position of a moving target on a grid plane is studied in this paper. The estimation method is based on encountering the number of infrared patterns that arrive to the target as expected, unexpected or out of order. Since the position of the target is not determined by an analog signal intensity, no high precision sensors and measurements are required and the coordinate estimation can be carried out by a pair of transmitters and a pair of sensors on the moving target. The speed of the estimation is adjustable according to the desired accuracy. An error of less than 5% can be reached in most of the covered area. The presented system can be used in a number of automation, robotics, virtual reality and ubiquitous applications.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117206187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5220/0002675901290138
A. Padovitz, A. Zaslavsky, S. Loke, B. Burg
This paper proposes a conceptual framework for context-awaresystems, inspired by the state-space modeling approach and proposes the concept of Stability as a means to characterize pervasive systems. We provide a collection of concepts concerning context, including Stability of contextaware pervasive systems and show how these concepts can be used in modeling context and actively maintaining stability and adaptation in a pervasive system. We experimentally evaluate these concepts using a genetic algorithm in a Smart Presentation Theatre scenario.
{"title":"Stability in Context-Aware Pervasive Systems: A State-Space Modeling Approach","authors":"A. Padovitz, A. Zaslavsky, S. Loke, B. Burg","doi":"10.5220/0002675901290138","DOIUrl":"https://doi.org/10.5220/0002675901290138","url":null,"abstract":"This paper proposes a conceptual framework for context-awaresystems, inspired by the state-space modeling approach and proposes the concept of Stability as a means to characterize pervasive systems. We provide a collection of concepts concerning context, including Stability of contextaware pervasive systems and show how these concepts can be used in modeling context and actively maintaining stability and adaptation in a pervasive system. We experimentally evaluate these concepts using a genetic algorithm in a Smart Presentation Theatre scenario.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128553666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5220/0002503700620070
Panos E. Kourouthanassis, G. Giaglis
Pervasive Information Systems (PIS) constitute an emerging class of Information Systems where Information Technology is gradually embedded in the physical environment, capable of accommodating user needs and wants when desired. PIS differ from Desktop Information Systems (DIS) in that they encompass a complex, dynamic environment composed of multiple artefacts instead of Personal Computers only, capable of perceiving contextual information instead of simple user input, and supporting mobility instead of stationary services. This paper aims at proposing a design theory for PIS. In particular, we have employed Walls et al. (1992) framework of Information Systems Design Theories (ISDT) to develop a set of prescriptions that guide the design of PIS instances. The design theory addresses both the design product and the design process by specifying four metarequirements, nine meta-design considerations, and five design method considerations. The design theory has been validated through the implementation of an Information System in the retail context following the theory’s prescriptions. A field experiment revealed that the design theory is capable of leading to valuable and acceptable PIS instances.
{"title":"A Design Theory for Pervasive Information Systems","authors":"Panos E. Kourouthanassis, G. Giaglis","doi":"10.5220/0002503700620070","DOIUrl":"https://doi.org/10.5220/0002503700620070","url":null,"abstract":"Pervasive Information Systems (PIS) constitute an emerging class of Information Systems where Information Technology is gradually embedded in the physical environment, capable of accommodating user needs and wants when desired. PIS differ from Desktop Information Systems (DIS) in that they encompass a complex, dynamic environment composed of multiple artefacts instead of Personal Computers only, capable of perceiving contextual information instead of simple user input, and supporting mobility instead of stationary services. This paper aims at proposing a design theory for PIS. In particular, we have employed Walls et al. (1992) framework of Information Systems Design Theories (ISDT) to develop a set of prescriptions that guide the design of PIS instances. The design theory addresses both the design product and the design process by specifying four metarequirements, nine meta-design considerations, and five design method considerations. The design theory has been validated through the implementation of an Information System in the retail context following the theory’s prescriptions. A field experiment revealed that the design theory is capable of leading to valuable and acceptable PIS instances.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123288500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5220/0002664600620072
A. Padovitz, S. Loke, A. Zaslavsky
There is an inherent chasm between the real-world and the world that can be perceived by computer systems, yielding uncertainty and ambiguity in system perceived context, with consequent effect on the performance of con- text-aware systems. While the problem is complex in depth and breadth, we explore an approach where context is characterized at different levels of ab- straction, and where contextual information at high-levels of abstraction and sensed context at low-levels of abstraction can be used to validate and correct low-level sensed context such as location. We describe a randomly generated simulation of locations that might be sensed by a positioning technology, and how our approach can be used to validate and correct the sensed locations.
{"title":"On Uncertainty in Context-Aware Computing: Appealing to High-Level and Same-Level Context for Low-Level Context Verification","authors":"A. Padovitz, S. Loke, A. Zaslavsky","doi":"10.5220/0002664600620072","DOIUrl":"https://doi.org/10.5220/0002664600620072","url":null,"abstract":"There is an inherent chasm between the real-world and the world that can be perceived by computer systems, yielding uncertainty and ambiguity in system perceived context, with consequent effect on the performance of con- text-aware systems. While the problem is complex in depth and breadth, we explore an approach where context is characterized at different levels of ab- straction, and where contextual information at high-levels of abstraction and sensed context at low-levels of abstraction can be used to validate and correct low-level sensed context such as location. We describe a randomly generated simulation of locations that might be sensed by a positioning technology, and how our approach can be used to validate and correct the sensed locations.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134263968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1900-01-01DOI: 10.5220/0002669401040112
A. Rakotonirainy, N. Lehman
We present a context awareness framework to assist a Museum visitor’s learning process by providing an enriched tour experience. We adapt the information a visitor receives about an artwork based on their interests and knowledge. We show how this is achievable by implementing a system that passively and unobtrusively gathers information using physical and virtual context. We also allow the visitor to visit virtually museums in different places while still benefiting from information adapted to their interests and knowledge.
{"title":"Augmenting a Museum Visitor's Tour with a Context Aware Framework","authors":"A. Rakotonirainy, N. Lehman","doi":"10.5220/0002669401040112","DOIUrl":"https://doi.org/10.5220/0002669401040112","url":null,"abstract":"We present a context awareness framework to assist a Museum visitor’s learning process by providing an enriched tour experience. We adapt the information a visitor receives about an artwork based on their interests and knowledge. We show how this is achievable by implementing a system that passively and unobtrusively gathers information using physical and virtual context. We also allow the visitor to visit virtually museums in different places while still benefiting from information adapted to their interests and knowledge.","PeriodicalId":104268,"journal":{"name":"International Workshop on Ubiquitous Computing","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121962221","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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