Topic
Context awareness
About: Context awareness is a research topic. Over the lifetime, 5790 publications have been published within this topic receiving 119944 citations.
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21 Apr 2018
TL;DR: Scenariot is presented, a method that enables instant discovery and localization of the surrounding smart things while also spatially registering them with a SLAM based mobile AR system and fosters in-situ interactions with connected devices.
Abstract: The emerging simultaneous localizing and mapping (SLAM) based tracking technique allows the mobile AR device spatial awareness of the physical world. Still, smart things are not fully supported with the spatial awareness in AR. Therefore, we present Scenariot, a method that enables instant discovery and localization of the surrounding smart things while also spatially registering them with a SLAM based mobile AR system. By exploiting the spatial relationships between mobile AR systems and smart things, Scenariot fosters in-situ interactions with connected devices. We embed Ultra-Wide Band (UWB) RF units into the AR device and the controllers of the smart things, which allows for measuring the distances between them. With a one-time initial calibration, users localize multiple IoT devices and map them within the AR scenes. Through a series of experiments and evaluations, we validate the localization accuracy as well as the performance of the enabled spatial aware interactions. Further, we demonstrate various use cases through Scenariot.
35 citations
TL;DR: The issue of context-aware sensing in BSNs is addressed, and different techniques for deducing context awareness are surveyed.
Abstract: Context awareness in Body Sensor Networks (BSNs) has the significance of associating physiological user activity and the environment to the sensed signals of the user. The context information derived from a BSN can be used in pervasive healthcare monitoring for relating importance to events and specifically for accurate episode detection. In this paper, we address the issue of context-aware sensing in BSNs, and survey different techniques for deducing context awareness.
35 citations
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TL;DR: In this paper, the authors introduce the vision of smart doorplates within an office building, which can display current situational information about the office owner, act instead of the office owners in case of absence, and direct visitors to the current location based on a location-tracking system.
Abstract: This paper introduces the vision of smart doorplates within an office building. The doorplates are able to display current situational information about the office owner, to act instead of the office owner in case of absence, and to direct visitors to the current location of the office owner based on a location-tracking system. Different scenarios are proposed and a prototype implementation is presented.
35 citations
26 Aug 2002
TL;DR: It is argued that the field would largely benefit from addressing issues of difficult to describe and to analyze impacts of pervasive computing applications explicitly, and there is a need for an analysis framework providing a specific terminology.
Abstract: Information appliances, user interfaces, and context-aware devices are necessarily based on approximations of potential users and usage situations. However, it is not an unusual experience for developers that in some areas, appropriate approximations are extremely difficult to realize. Often, these difficulties are not apparent from the beginning. Nevertheless, difficulties are rarely addressed in the pervasive computing literature as they appear to be peripheral compared to the technical challenges. In this paper, we argue that the field would largely benefit from addressing these issues explicitly. First, focussed discussions would help identify areas that have already shown to be difficult or even intractable in related disciplines, such as AI or CSCW. Second, it would help developers become aware of the difficulties and would allow them to deliberately circumvent such areas. We use example scenarios from the pervasive computing literature to illustrate these points. Difficulties to describe and to analyze impacts of pervasive computing applications indicate a need for an analysis framework providing a specific terminology.
35 citations
19 Jul 2010
TL;DR: The development of a semantic reasoner to be installed onto the resource-limited mobile user devices to accommodate context-aware ubiquitous computing services, a data-log and rule-based inference engine which performs semantic reasoning operations over the application semantics represented in OWL-DL.
Abstract: Mobile user devices, such as smart phones have become the most popular high-end mobile devices far beyond just cellular communication devices. They will continue evolving toward being palm-top computers with the rapid development of wireless communications and platform technologies. This paper introduces our development of a semantic reasoner called MiRE4OWL to be installed onto the resource-limited mobile user devices to accommodate context-aware ubiquitous computing services. It is a data-log and rule-based inference engine which performs semantic reasoning operations over the application semantics represented in OWL-DL. The mobile rule engine that underlies MiRE4OWL achieves light-weight design to meet the resource constraints of the mobile devices and yet achieves better expressiveness than existing engines. The performance evaluation showed that the intended functionality and resource efficiency have been fulfilled.
35 citations