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Mobile Applications are rapidly emerging as a convenient medium for using a variety of services. In ubiquitous environment, the challenge relies on developing applications that sense and react to environmental changes to provide a value-added user experience. This context awareness property improves application usability. Context information can be related to the environment, user but also to the...
In this work we approach the study of team situation awareness based upon a holistic perspective that integrates the shared and distributed nature of the construct. We studied team situation awareness in the context of critical incidents response management, as it constitutes a valuable asset and yet is continuously challenged by the very nature of the context. We applied a micro world approach as...
To provide effective mobile services in spite of network disruption, context aware middleware services on mobile devices and application servers can provide services for continuation of applications, by managing mobile services, network connection, limited resources, and context information. In this paper, we propose context aware middleware services for disconnection tolerant mobile application services...
We present a visualization framework integrated in a context-aware system that uses a common underlying stream processing middleware for tight integration of data accessing, processing, and visualization. Context-aware systems are often realized on mobile devices that do not have the computational power to perform complex tasks. Therefore, a dedicated hardware infrastructure might be required for...
With the abundance and ubiquity of mobile devices, a new class of applications is emerging, called participatory sensing (PS), where people can contribute data (e.g., images, video) collected by their mobile devices to central data servers. However, privacy concerns are becoming a major impediment in the success of many participatory sensing systems. While several privacy preserving techniques exist...
The “Web of Things” vision promotes the integration of smart devices into web, using web technologies and protocols as underlying interaction mechanisms with smart devices. Technically many phones include various sensors and provide a large-scale sensing platform. To make this functionality available to a large number of (web) developers our research aims at easing the creation of applications that...
Mobile learning is considered the next step of online learning by incorporating mobility as a key requirement. Indeed, the current wide spread of mobile devices and wireless technologies brings an enormous potential to e-learning, in terms of ubiquity, pervasiveness, personalization, flexibility, and so on. For this reason, Mobile Learning is attracting significant research efforts covering a fairly...
Mobile handsets (phones) are expected to increase from the current 4.5B (billion) subscriptions to over 6B in 2013 and thus dwarf the numbers of PCs (e.g. desktop, laptop, netbook, etc.) that are expected to rise from the current 1.1B to 2B in 2015. But more importantly, data transmission from and to mobile handsets is becoming and increasingly available and affordable. The dramatic improvements in...
This paper describes the design and implementation of location and situation based adventure games. The prototype uses different types of sensor data - including 3D acceleration data and XPS - to determine the current positions and activities of the players. Depending on the continuous classification, data and quests are retrieved accordingly from a central information system and visualised for the...
In this paper, we propose a context-aware Input Method Editor (IME) as a ubiquitous service for improving the input of text on mobile devices. In our proposed IME, it estimates the context of users according to position information from GPS (Global Positioning System) sensor or a presence information from the Internet. Simultaneously, it generates a personal context-aware dictionary dynamically from...
This paper describes concepts, design, implementation, and performance evaluation of a 3D-based user interface for accessing Ambient Intelligence Environments (AmIE). The generic interaction model of the described work addresses some major challenges of Human-Environment-Interaction such as cognitive overload and manual device selection, loss of user control, missing system image or over-automation...
This paper develops a client-side context-aware search application which is built on the context-aware infrastructure. A context-aware architecture is designed to collect the mobile user's context information, derive mobile user's current context, distribute user context among context-aware applications, and support the context-aware applications. The context acquisition is centralized at the context...
With the rapid advancing in electronics, VLSI, and nanotechnology, ubiquitous devices (u-objects) like mobile devices, sensing devices, RFID devices, IC cards, wireless devices, wireless wearable devices, etc. are getting more and more in number, smaller and smaller in size, and even invisible in form. In order to make them work without human involved and interaction, there is necessity of enabling...
The popularity of mobile devices and their increased computing power has given rise to surge in mobile computing technologies. Users are increasingly turning to mobile devices for information relating to their activities and location while on the move. Independent of this, the world has seen a huge uptake in the social web, which has fueled the production of applications where users are the sole providers...
During the last few years, mobile devices such as cellular phones and PDAs have become sophisticated tools for creating digital content. Moreover, their built-in or attachable sensor capabilities make it possible to derive metadata that denote the context of the user. The challenge of annotating digital content with contextual metadata is a central part of our current research efforts and the main...
Mobile search is becoming increasingly important for mobile users as mobile devices are more widely used. Mobile search differs from standard PC-based Web search in a number of ways: (1) the user interfaces and I/O are limited by screen real estate and tiny key pads are tiny, (2) limited bandwidth and costly connection time, (3) increased local search due to mobility. These limitations result in more...
In this paper we introduce a novel scenario for environmental sensing based on the combination of simple and cheap RFID-based sensors and mobile devices like mobile phones with integrated RFID readers. We envision a system that exploits the availability of these devices to cooperatively read sensors installed in the environment, and transmit the data to a server infrastructure. To achieve quality...
With appearance of mobile devices such as cell phones, PDAs and smart phones, context-aware applications are becoming increasingly popular. Therefore, developers are always seeking for new and powerful developing tools for context-aware programming. Developers prefer to use fast and convenient development tools that can support all required possibilities for implementing a complete and user-friendly...
Although the landscape of mobile devices is continuously evolving towards more powerful terminals, the limitations regarding processing power, memory capacity and speed, network connection and battery, are still present and at certain loads fail to satisfy the requirements of complex applications. Being always connected to the network offers a solution to this problem as the server infrastructure...
BeTelGeuse is an extensible data collection platform for mobile devices, which also automatically infers higher level context from sensor data. In this article, the authors introduce BeTelGeuse's architecture and current features, and evaluate its impact on mobile phone performance.
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