Algorithm of Remote Monitoring ECG Using Mobile Phone: Conception and Implementation

Researches in the medical remote monitoring at home have taken a great consideration and care in wireless communication these last years. The set of these researches is linked to the aging population and lack of infrastructures of reception for persons exposed to accident’s risks in their daily life or degradation of their health in short time. The principal objective is to permit a taking off for medical and social dependant people as aged ones, handicapped, in order to the adaptation with their environment domestically and make up their incapacities. In this case, it is indispensable to make a diagnostic in a real time and managed really the given data of patients between medical actors with the permanent security insurance of highly risky patients. Furthermore, the need to make a speed diagnostic of patients and to detect their health state with efficacy permits the gain of time in their taking off. The stakes of setting up such systems are numerous, so much for patients, medical staff and the society generally. So, it is useful to detect and prevent the occurrence of critical situations of a person at home, implying the transmission of message and alarms to actors concerned and ready to intervene in case of necessity. Our attention has been focused on the choice of a relevant work. It concerns an application on a mobile terminal (MIDlet) for monitoring patient in a non-hospital setting. This paper recalls a complete architecture of an economic wireless transmission system with the implementation of an effective algorithm, adapted to the mobile terminal, allowing to the doctor to have the results of analysis of ECG data wirelessly

Design and Optimization of Rectangular Waveguide Filter based on Direct Coupled Resonators

The waveguide  filter structure is treated by two softwares (HFSS (High Frequency Structure Simulator) and CST (Computer Simulation Technology)). Numerical example is given in this article to demonstrate, step by step, the application of the approach to the design of resonator, direct coupled waveguide and microstrip filters based on electromagnetic (EM) simulations. For this design procedure, the filter structure is simulated by successively adding one resonator at a time. To continue the work illustrates how to design a fourth order coupled resonator based rectangular waveguide circuit in the traditional way. With a large number of variables, such tuning work consumes a lot of time and the convergence of the final result is not guaranteed. A fourth order X-band bandpass filter with a center frequency of 11 GHz and a fractional bandwidth FBW = 0,0273 is designed using this procedure and presented here as an example. The simulated results by CST are presented and compared withthe results simulated by a high-frequency structure simulator. Good agreement between the simulated HFSSand simulated results by CST is observed

A Hybrid Cluster and Chain-based Routing Protocol for Lifetime Improvement

International audienceThe main challenge in the field of Wireless Sensor Networks (WSNs) is the energy conservation as long as possible. Clustering paradigm has proven its ability to prolong the network lifetime. The present paper proposes two algorithms using an approach that combines fuzzy c-means and ant colony optimization to form the clusters and manage the transmission of data in the network. First, fuzzy c-means is used to construct a predefined number of clusters. Second, we apply Ant Colony Optimization (ACO) algorithm to form a local shortest chain in each cluster. A leader node is randomly chosen at the beginning since all cluster nodes have the same amount of energy. In the next transmission, a remaining energy parameter is employed to select leader node. In the first algorithm, leader nodes transmit data in single hop to the distant base station (BS) while in the second the ACO algorithm is applied again to form a global chain between leader nodes and the BS. Simulation results show that the second proposed algorithm consumes less energy and effectively prolongs the network lifetime compared respectively with the first proposed and the LEACH algorithms

Predicting the Probability of Spectrum Sensing with LMS Process in Heterogeneous LTE Networks

Mobile communication systems present an actuality subject in academic and industrial research activities due to several phenomena such as interferences, multipath, fading, and shadowing. All this lead to a severe perturbation on handover mechanism which depends on specific reports, essentially, reference signal received power (RSRP) and signal-to-interference and noise ratio(SINR). In this paper, we design a new technique in handover domain; it consists of combining energy detection method used in cognitive radio with least mean square (LMS) process in order to prognosticate the handover impact in a realistic scenario of heterogeneous LTE network. More exactly, technique sense of the word "triggering" will be changed to a probability of detection Pd. The proposed algorithm cycle follows two main steps; Firstly, predict at what time the absence of spectrum (primary user) will occur, using a predicted sensing probability Pˆd (t+p) . Secondly, search others spectrums in this time by calculating Pd(t) for each sensed signal and hand-off secondary user in the best spectrum. The results achieved of the simulation are evaluating, it shows that the proposed method predict the original Pd correctly with minimal errors and select the best spectrum successfully

WIRELESS SENSOR NETWORKS LOCALIZATION ALGORITHMS: A COMPREHENSIVE SURVEY

ABSTRAC

Experiences and expertise in building Arabic electronic dictionaries: an example from the lingual electronic dictionary

It is crucial to develop electronic Arabic dictionaries and transfer them from mere rigid dictionaries to interactive electronic dictionaries rich in everything that technological development has done through well-thought-out and effective approaches. This would not only enrich the Arabic language learner with countless linguistic information on the vocabulary words but help them to understand what they read and apply these words in context. This study focuses on three main objectives; firstly, the challenges facing the computerized Arabic language processing, secondly, the linguistic features to be incorporated in developing the lingual electronic dictionary, and thirdly, the development of this software using instructional development model ADDIE which includes procedures carried out through the design and development of the program such as, choosing the database, selecting the lexical, linguistic, and morphological content, outlining the selected software developmental tools used, ensuring its effectiveness through the actual testing, presenting the results, and selecting the method used in analysing them statistically. The methods used in the study are in three folds; using inductive approach for reviewing the literature, applying computer linguistic analysis approach during analysing the language data for the software, and development approach through the implementation of ADDIE model. The study output is resulting from the successful development of the lingual electronic dictionary program incorporated with the designated linguistic features. In conclusion, the authors summarized some important points in the field of developing the Arabic electronic dictionary with the hope that this study shades some lights in the design and development of the similar software and for the similar purposes in future