The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Context-aware self-adaptive applications monitor and exploit knowledge about external operating conditions and adapt to changes in the execution context. Modern smartphones are equipped with several sensors, like GPS sensor or accelerometer. Additionally, context reasoners and external context providers exist. Thus, it is possible that several context providers offer information of the same type (e...
Maritime surveillance involves gathering and integrating a large amount of heterogeneous information of variable quality to provide diverse decision makers with reliable knowledge about situations and threats. This requires information processing at all fusion levels while taking into account contextual information. Context is especially important for harbor surveillance, one of the most challenging...
In present-day military security operations threats are more difficult to reveal than in conventional warfare theatres, since they take place during the course of normal life. These maritime missions often take place in littoral environments, where acts of piracy, drug trafficking and other threatening events become obscured in the crowd of everyday fisheries, cargo traders, ferries and pleasure cruises,...
This paper presents a light inference system for context management, ready to perform reasoning tasks in resource-constrained devices. The inference system is part of a service-oriented mobile software framework which runs on Javaenabled handheld devices. This framework serves to facilitate the creation of context-aware applications, as it decouples sensor's data acquisition and context processing...
This paper addresses issues of safety in pervasive spaces. We show how pervasive systems are different from traditional computer systems, and how their cyber-physical nature ties intimately with the users. Errors and conflicts in such space could have detrimental, dangerous or undesired effects on the user, the space, or the devices. There are no support systems or programming models conscious of...
Context awareness is just beginning to revolutionize the ways we interact with networked devices. In order for context awareness to flourish, especially in a pervasive environment, users must be certain that their privacy is respected. Privacy in pervasive online community depends on the level of granularity of the provided information, user's relation to possible recipients, and the possible usage...
Ubiquitous Life Care (u-Life care) is one of the most focus area of research. To provide robust healthcare services, recognition of patient daily life activities is required. Context information with real-time daily life activities can help in better services, service suggestions, and change in system behaviour for better healthcare. Human health, profile, as well as activities are monitored and processed...
Assessing the quality of sensor-originated information is key for the effective and predictable operation sensor-enabled computerized applications. However, with increasing uncertainties due to alternative deployment scenarios, operational realities, and sensing resource use, it becomes very challenging in designing replicable software solutions that can be easily reused in a number of occasions with...
Currently, although logistics systems are based mostly on the barcode system and partly on radio frequency identification (RFID) systems, they still depend on humans checking or validating products. Situation-awareness technologies can operate similarly to humans. We suggest a middleware system based on an ontology using situation-awareness technologies for logistics. The middleware is aware of the...
The main knowledge management challenges are to capture, store and reuse contextual knowledge generated during interactions that occur daily in an organization. In this paper, we propose an activity context-aware architecture to support knowledge management in working processes. The required features for this architecture are processing, reasoning and sharing contextual knowledge involving information...
Serious virtual worlds provide more than just entertainment, they are used perform various tasks. With this in mind, we should revisit the user interactions and related devices and techniques in order to achieve the best performance possible. Therefore, we should offer some affordances to take advantages of these new developments. We consider context and context awareness to help modify applications...
The area of context-aware computing has received much attention in the last decade. However, many systems to determine a user's context are focused on integrating a confined set of sensors into their decision-making algorithms, and lack extensibility for new and novel sources of context information. This limitation however has often resulted in monolithic software systems, reasoning on the user's...
Ubiquitous computing environment pursues context-aware in order words personalized service by collecting contexts through sensors located over wide area and presenting the service automatically depending not on the user's request but on the situations that are needed. But in order to provide the personalized service, contexts collected through various sensors are needed and they include private information...
Emerging technologies like mobile and wireless communication are offering promising opportunities to enable mobile healthcare delivery to citizens. But, enhancing the quality of service of such systems demands systematic improvement of existing service infrastructure. In this paper, we describe a context information refinement architecture proposed to address the shortcomings of existing works in...
Designing fusion systems for decision support in complex dynamic situations calls for an integrated human-machine information environment, in which some processes are best executed automatically while for others the judgment and guidance of human experts and end-users are critical. Thus decision making in such environment requires constant information exchange between human and automated agents that...
Location is a core concept in most pervasive systems-and one that's surprisingly hard to deal with flexibly. Using a location model supporting a range of expressive representations for spaces, spatial relationships, and positioning systems, the authors constructed LOC8, a programming framework for exploring location data's multifaceted representations and uses. With LOC8, developers can construct...
One of the hot topics in ubiquitous computing is context-aware services, which automaticlly adapt user based on user's context information, e.g., location, time, favorite etc. Situation-aware services are advanced context-aware services, such that more complex context information and relations among users, objects, and environment are taken into consideration. In order to provide the situation-aware...
The pervasiveness of mobile devices and short-range wireless networks deployed in urban areas have brought Weiser's vision of ubiquitous or pervasive computing into reality. The mobile devices weave themselves into urban dwellers' lives as an undetachable part. In urban places, there are not only people but also their devices' presence. Interestingly, devices can communicate wirelessly with each other...
In the context of the EU funded R&D project ATRACO we are developing a conceptual framework and a system architecture that will support the realization of adaptive and trusted ambient intelligent systems. Our approach is based on a number of well established engineering principles, such as the distribution of control and the separation of service interfaces from the service implementation, adopting...
Every modern portal ships with some form of internal document library portlet tools that can be used to enable groups to share files. Unfortunately, certain limitations - that the portlet can only view data managed directly by the portal and that document and data files are the only resource that can be browsed - make these tools less valuable in many real-world collaborations. This paper describes...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.