Philip Constantinou

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The need for participation in an emerging <i>Information Society</i> has led to several research efforts for designing accessibility solutions for disabled people. In this paper we present a method for developing Human-Computer Interfaces (HCIs) for quadriplegic people in modern programming environments. The presented method accommodates the design of(More)
In this paper, a methodology is described in order to investigate the performance of empirical mode decomposition (EMD) in biomedical signals, and especially in the case of electrocardiogram (ECG). Synthetic ECG signals corrupted with white Gaussian noise are employed and time series of various lengths are processed with EMD in order to extract the(More)
In a heterogeneous wireless network environment services are ubiquitously delivered over multiple wireless access technologies. Ranking of the alternatives and selection of the most efficient and suitable access network to meet the QoS requirements of a specific service, as these are defined by the user, constitutes thus an important issue. Decisions on(More)
This work presents the results of a study on a set of small antennas for wireless microsensor devices. We consider antennas that are small compared to the wavelength, and can be fitted on a small PCB. The key point regarding small antennas is that their performance is heavily dependent on their electrical size. The product of the bandwidth and the gain is a(More)
The present paper studies the prospective and the performance of a forthcoming high-speed third generation (3.5G) networking technology, called enhanced uplink, for delivering mobile health (m-health) applications. The performance of 3.5G networks is a critical factor for successful development of m-health services perceived by end users. In this paper, we(More)
The design and implementation of sensor nodes equipped with low-complexity multi-element antennas (MEApsilas) is considered in this work. The design restrictions imposed by the size limits of the sensors, as well as the requirements for the antenna elements employed have been investigated. In the process of implementing such a system, there are a number of(More)
This paper reports narrowband and wideband results derived by propagation modeling at 60 GHz for indoor WLAN applications. A multi-ray model is proposed and verified through a simulation process. The propagation in the site-specific environment can be described using 4-5 rays without reducing the accuracy of the results. RMS delay spread varies with(More)