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Bipolar magnetic regions (BMRs) are the corner-stone of solar variability. They are tracers of the large-scale magnetic processes that give rise to the solar cycle, shapers of the solar corona, building blocks of the large-scale solar magnetic field, and significant contributors to the free-energetic budget that gives rise to flares and coronal mass ejections. Surprisingly, no homogeneous catalog...
The characterization of optimization problems over continuous parameter spaces plays an important role in optimization. A form of “fitness landscape” analysis is often carried out to describe the problem space in terms of modality, smoothness and variable separability. The outcomes of this analysis can then be used as a measure of problem difficulty and to predict the behaviour of a given algorithm...
The new paradigm of e-Health demands open sensors and middleware components that permit transparent integration and end-to-end interoperability of new personal health devices. The use of standards seems to be the internationally adopted way to solve these problems. This paper presents the implementation of an end-to-end standards-based e-Health solution. This includes ISO/IEEE11073 standard for the...
The key problem in a parallel system is how to distribute the work load to the components of the system in order to get optimal resource utilization, maximize throughput, and minimize response time. The sliding-window (SW) switch is a highly parallel architecture that uses an array of memory-modules to store and process data packets in high speed-networks and Internets. In this paper, we study two...
Mobile agents are processes that can migrate autonomously from new hosts. Despite of the huge number of fields of application of this technology, a lack in the security exists. The main approach of this work is based on the provision of a secure execution environment for mobile agents. Our approach is based on the idea of the trusted migration. This trusted migration is reached by means of the use...
Current approaches for software development fail in the integration of security aspects. Usually, this is because of the software complexity and the specific expertise needed for the integration of modern security solutions. In this paper we present the SERENITY Project which proposes a framework addressing this issue. SERENITY is based on the separation of the development of security solutions from...
The aim of this paper is to introduce a novel 12 GHz radiating design based on the idea of active transmitarray. This structure is a kind of intelligent antenna which consists of two radio interfaces connected through microwave circuitry. A feeding horn is placed in front of the RX radio interface, which is illuminated by an incident wave. The intermediate circuits act on the received electromagnetic...
The design and implementation of a robot team consisting of three homogeneous mobile robots and an external server is presented. The main goal of the robot team is the updating of a map or representation of an indoor environment. A scheme for collective exploration was defined. This scheme enables robots to navigate and self-locate within an indoor environment, communicate to each other, create local...
Evolutionary computation is generic name given to the resolution of computational problems with base in models of an evolutionary process. Most of the evolutionary algorithms propose biological paradigms, and concepts of natural selection, mutation and reproduction. Nevertheless other paradigms exist which can be adopted in the creation of evolutionary algorithms. Many problems involve not structured...
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