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The fast expansion of Internet-based multimedia services like Netflix, Skype or YouTube -- the so-called Over-The-Top Services (OTT) -- have increased the quality requirements of these services from the point of view of the user. In this sense, it is important not only to ensure a good Quality of Service (QoS) level -- technical metrics -- but also a high level of Quality of Experience (QoE) -- subjective,...
An ever-growing number of network connected devices per user and changing usage preferences in current networks require novel monitoring techniques be put in place by operators to identify and, if possible, predict user requirements and behaviour. This study utilises NetFlow and cluster analysis to derive six unique traffic profiles namely, 'communicators', 'concealers', 'downloaders', 'all-rounders'...
The paper presents an analytical model to study the performance and availability of queueing systems with finite queue and two service phases. The first phase has the exponential distribution of service time, while the second one has the hyperexponential distribution. The analytical results obtained are verified using discrete-event simulation. A few numerical examples for varying the service rates...
The increased computation and storage capabilities of smartphones have attracted more and more cybercriminals to write mobile malware for different purposes. Due to the popularity of smartphones in both personal life and business, it is empowering an emerging mobile security threat issue. In this paper, we present an intrusion detection system that incorporates not only network features but also host-based...
This paper studies the performance of a wireless sensor network (WSN) with cognitive radio (CR) capabilities to gather information about structural health monitoring (SHM) of buildings in case of seismic activity. The system performance is evaluated in terms of average packet delay and average energy consumption. In order to efficiently use the resources of the network and considering that the WSN...
Micro-grids allow rural and remote communitiesthat are either not connected to the national power grid, or sufferfrom load shedding, to operate power networks autonomously. Like conventional power networks, micro-grids require management and billing mechanisms. Tamper-resistant meters are noteconomically viable so we use a resource-constrained networkformed of devices with limited memory, processing...
In the last years, the Cloud services market experienced an extremely rapid growth, which may lead to severe scalability problems. Therefore, in order to cope with the resource capacity limits of a single Cloud provider, as well as to address the vendor lock-in problem associated to the choice of a single proprietary Cloud solution, the concept of federating multiple heterogeneous organizations is...
Lacking better methodology is one main factor that prevents remote healthcare application development using wearable sensors. Sensor devices and data heterogeneity are two additional factors. Integrating devices is a challenge due to lack of interoperability between APIs, protocols and their data formats, despite they relate to same device type. ANT+, a proprietary protocol, strengthens the goals...
Traditional database information and IoT real time data are now evolving to unified paradigms in whose accessing diverse data endpoints can be challenging due to interoperability problems that emerge when instant data are monitored and collected in typical database scenarios. In this paper, a new model is proposed to link persistent data with instantaneous information using publish-subscribe networks...
Smart Cities and outdoor advertising open newopportunities and important markets. For that purpose, theunderstanding of the citizens mobility may be highly helpful. Indeed, their mobility and the monitoring of their personalinterests can be a way of recommending specific advertising. We herein propose a new billboard system based on monitoringtechniques and realistic mobility patterns. Our objective...
Despite the wireless communication for rotating electrical machines is beneficial for both real time monitoring and diagnosis purposes, this technology application may cause some inconveniences. The difficulties are introduced from many factors like: cramped space, the geometry of the devices, the flux of rotating electrical machine and especially the presence of rotating electromagnetic fields of...
The discussion of data communications in Internet of Things (IoT) often concentrates on technical issues: physical signals, protocols, database architectures, stream processing, cloud storage. On the higher level data interoperability and common semantics are major problems. In this paper we want to discuss the issues related to data interchange between independent, collaborating parties. We will...
The Cloudifier project deals with the design and development of an ecosystem of toolsfor the assisted migration to a cloud or multi-cloud environment of scientificand business-oriented distributed applications. Recent surveys show that many of theorganizations that are not yet running their applications in the cloud are experimentingwith infrastructure-as-a-service mode. The Cloudifier tools will...
Information about us is increasingly interesting to those who wish to understand our persona, our interests, and the context within which we lives our lives. Regulation follows with the aim to maintain our privacy in modern times. However, such regulation doesn't prescribe the detail of the processes needed to support the intended objectives of regulation. Nor, do we understand the requirement of...
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