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Support Vector Machines (SVMs) are considered to be one of the most powerful classification tools, widely used in many applications. However, in numerous scenarios the classes are not equally represented and the predictive performance of SVMs on such data can drop dramatically. Different methods have been proposed to address moderate class imbalance issues, but there are few methods that can be successful...
Human behavior modeling enables many applications for smart cities, smart homes, mobile phones and other domains. We present a hierarchical hidden Markov model for human activity recognition that uses semi-supervised learning to automatically learn the model parameters using only labeled data of the top-layer of the hierarchy. This significantly reduces the annotation requirements for such a model...
Autonomic networking and cooperative communications paradigms have emerged as promising technologies that can pave the way for next generation networks. CONSERN project is focusing on cooperation and collaboration enablers, cooperative decision and control algorithms that will maximise the expected gains by utilising cooperative problem solving for improving energy efficiency in wireless networks...
Wireless Sensor Network (WSN) applications often need to be deployed in harsh environments, where the possibility of faults due to environmental hazards is significantly increased, while silicon aging and wearout effects are also exacerbated. For such applications, periodic on-line testing of the WSN nodes is an important step towards correctness of operation. However, on-line testing of processors...
Software-Based Self-Test (SBST) has emerged as an effective method for on-line testing of processors integrated in non safety-critical systems. However, especially for multi-core processors, the notion of dependability encompasses not only high quality on-line tests with minimum performance overhead but also methods for preventing the generation of excessive power and heat that exacerbate silicon...
In next generation systems and networks, the incorporation of mechanisms achieving robust, predictable and self-adaptive behavior with minimum cost will be a key requirement. Towards this goal we introduce the notion of the "self-growing network". The latter, in its initial deployment stage, is limited to a single dedicated purpose (energy-efficient networking, spectrum efficient communications,...
Software-based self-test (SBST) has emerged as an effective strategy for on-line testing of processors integrated in non-safety critical applications. Among the various systems that fall in the previous category, wireless sensor networks (WSN) are often deployed in harsh environments where the possibility of permanent and especially intermittent faults due to environmental hazards is significantly...
The vast proliferation in the continuously changing telecommunications environment of Next-Generation-Networks (NGNs) poses strict requirements for the dynamic adaptation of mobile devices according to the user needs, system resources and Radio Access Technology (RAT) availability. The reconfiguration concept emerges as a paradigm that offers an effective solution to this problem. On the other hand,...
Software-based self-test (SBST) has emerged as an effective strategy for non-concurrent on-line testing of processors integrated in embedded system applications. It offers the potential for on-line testing without any hardware overhead. However, test generation is usually based in a semi-automated approach and gate-level information is required for effective test program generation.In this paper we...
In this article, we introduce a hybrid-SBST methodology for efficient testing of commercial processor cores that effectively uses the advantages of various SBST methodologies. Self-test programs based on deterministic structural SBST methodologies combined with verification-based self-test code development and directed RTPG constitute a very effective H-SBST test strategy. The proposed methodology...
Software-based self-test (SBST) has emerged as an effective strategy for on-line testing of processors integrated in non-safety critical embedded system applications. Among the most popular applications falling in this category are the various mobile devices. However, in-field testing of processors integrated in mobile devices has the extra requirement of minimum energy consumption, since these devices...
The continuous proliferation in modern communication technologies towards a pervasive composite environment prescribes a profound shift in telecommunication management and poses new challenges, in terms of proposing key solutions for the management and support of legacy as well as emerging systems. Driven by these advances, a direct requirement lies in providing an advanced configuration system that...
Today's nanometer technology trends have a very negative impact on the reliability of semiconductor products. Intermittent faults constitute the largest part of reliability failures that are manifested in the field during the semiconductor product operation. Since software-based self-test (SBST) has been proposed as an effective strategy for on-line testing of processors integrated in non-safety critical...
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