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.
Localization using sensor network has attracted much attention for its comparable low-cost and potential use with monitoring and targeting purposes in real and hostile application scenarios. Currently, there are many available approaches to locate persons/things based of GPS and RFID technologies. However, in some application scenario, e.g., disaster rescue application, such localization devices may...
This paper proposes an in-network, decentralized algorithm for determining the qualitative spatial structure of complex a real objects, which may have multiple disconnected components. The algorithm determines both the containment relations between region components and the adjacency relations between Voronoi regions of those components. Combining this information yields finer-grained qualitative...
Complex event processing (CEP) has been an area of intensive research in recent years. Similarly, mobile devices such as smartphones, tablets and laptops are widespread nowadays. Consequently, the integration of CEP into mobile computing is a natural idea. In this paper, we present MetaXA, an event-driven architecture (EDA) with CEP specifically designed for mobile devices, along with its application...
With the elderly population growing around the world, falls increase the risk progressively with age. Those falls can origin injuries that may cause a great dependence and debilitation to the elderly, and even death in extreme cases. This paper reviews the related literature about this topic and introduces a mobile solution for falls prevention, detection, and biofeedback monitoring. The falls prevention...
A mobile health application solution with biofeedback based on body sensors is very useful to perform a data collection for patients remote monitoring. This system allows comfort, mobility, and efficiency in all the process of data collection providing more confidence and operability. Falls represent a high risk for debilitated elderly people. Falls can be detected by the accelerometer presented in...
The new ADL Experience API is an attempt for better interoperability between different types of educational systems and devices. This new specification is designed to link sensor networks for collecting and analyzing learning experiences in different contexts. This paper analyses how the concepts of the Experiences API were integrated in a mobile learning application and how the app uses learning...
Location-based services (LBS) deliver location-dependent content to mobile users. Mobile users are equipped with devices, e.g., smartphones, which regularly report the position to a back-end system (BES). Users, with similar moving patterns, might also have requests for similar content delivery (e.g., museum/city-tour guidance, traffic conditions). Moreover, users can be formed into (temporal) groups,...
Reducing operational costs and increasing energy efficiency are critical for mobile operators. One accepted way to tackle these issues is to make use of virtualization to share the same physical infrastructure among several virtual networks. However, sharing physical infrastructure presents a number of challenges, such as security issues, conflicting hardware control, and fair resource sharing. In...
ICT technologies provides non-invasive and low cost solutions to improve safety and security in public transport vehicles for persons and freights. In this paper we consider an intelligent heterogeneous sensor network installed on the vehicle to monitor its status. The network can be remotely interrogated by operators in the command and control centre (C&C) that, in turn, can be automatically...
Provision of instantaneous, mobile and dependable media communications in military and disaster scenarios must overcome certain wireless network issues: lack of reliable existing infrastructure, immutability of safety-certified protocols and layer-2 dynamics with contributing factors including hidden transmitters and fading channels. This extended abstract investigates a cross-layer methodology to...
Railway transportation uses specific technologies such as GSM-R for traffic signaling purposes, but commercial networks could also provide added value services to passengers and transport companies such as CCTV or telemetry. Furthermore mobile users increasingly want to be always connected even when they are traveling. Although current deployed technologies such as 3G provide wide coverage in general,...
The perceived end-to-end performance of the mobile Internet can be impacted by multiple factors including websites, devices, and network components. Constant changes in these factors and network complexity make identifying root causes of high latency difficult. In this paper, we propose a multidimensional diagnosis technique using passive IP flow data collected at ISPs for investigating factors that...
In this paper, we employ the ideas of obfuscation, i.e., concealment, and power variability to propose a new location privacy scheme, the fake point, which can be used to ensure users' privacy in NEMO-based VANETs. The proposed scheme thwarts location privacy attacker who exploits positioning systems to localize users. To the best of our knowledge, our scheme is the first to apply obfuscation techniques...
We describe a system for performing SLA-driven management and orchestration of distributed infrastructures composed of services supporting mobile computing use cases. In particular, we focus on a Follow-Me Cloud scenario in which we consider mobile users accessing cloud-enable services. We combine a SLA-driven approach to infrastructure optimization, with forecast-based performance degradation preventive...
In the ubiquitous computing environment, a ubiquitous vehicle will be a communication node in the vehicular network as well as the means of ground transportation. It will make humans and vehicles seamlessly and remotely connected. Especially, one of the prominent services in the ubiquitous vehicle is the vehicle teleoperation. However, mutual-collaboration with the in-vehicle communication network,...
We study the performance improvement of Location Based Services through the identification and subsequent use of groups of mobile nodes. In our scheme we exploit the formation of nodes into groups in order to reduce the computation load incurred in back--end systems (e.g., Location Servers) and the associated network overhead. The back--end systems track the position and communicate with the Group...
The main reason of wasting time in search of free parking spaces is the lack of information, in particular for open/roadside parking availability. Various ICT-based solutions have been proposed to solve this issue, but still suffering from limited integration among each other and with external online services, such as touristic information services. In this paper we illustrate a modular, service-oriented...
Timed-Up-and-Go (TUG) is a simple, easy to administer, and frequently used test for assessing balance and mobility in elderly and people with Parkinson's disease. An instrumented version of the test (iTUG) has been recently introduced to better quantify subject's movements during the test. The subject is typically instrumented by a dedicated device designed to capture signals from inertial sensors...
Individuals with limited ambulatory skills are at high risk for all physical inactivity-related diseases, such as coronary disease and diabetes. Increased physical activity can significantly lower risks of these diseases. However, quantifying recommendations for increased physical activity remain challenging for individuals who use wheelchairs for mobility. In this paper we introduce a smart wheelchair...
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.