This work is designed to study the energy management of a Proton Exchange Membrane Fuel Cell (PEMFC), which is based on the activity and management of water and its effect on the electrolyte membrane (FC) as a function of the influx of hydrogen and oxygen, by taking into account the influence of humidification on the implementation of this electrical system to avoid drying and flooding that can cause deterioration of the FC. The cell voltage and system efficiency are also influenced by current density and operating temperature, and simulation results on MATLAB/Simulink are discussed.

In this study, a mathematical model is developed based on algebraic equations which is capable of generating artificially normal events of electrocardiogram (ECG) signals such as P-wave, QRS complex, and T-wave. This model can also be implemented for the simulation of abnormal phenomena of electrocardiographic signals such as STsegment episodes (i.e. depression, elevation, and sloped ascending or descending) and repolarization abnormalities such as T-Wave Alternans (TWA). Event parameters such as amplitude, duration, and incidence time in the conventional ECG leads can be a good reflective of heart electrical activity in specific directions. The presented model can also be used for the simulation of ECG signals on torso plane or limb leads. To meet this end, the amplitude of events in each of the 15-lead ECG waveforms of 80 normal subjects at MITBIH Database (www.physionet.org) are derived and recorded. Various statistical analyses such as amplitude mean value, variance and confidence intervals calculations, Anderson- Darling normality test, and Bayesian estimation of events amplitude are then conducted. Heart Rate Variability (HRV) model has also been incorporated to this model with HF/LF and VLF/LF waves power ratios. Eventually, in order to demonstrate the suitable flexibility of the presented model in simulation of ECG signals, fascicular ventricular tachycardia (left septal ventricular tachycardia), rate dependent conduction block (Aberration), and acute Qwave infarctions of inferior and anterior-lateral walls are finally simulated. The opensource simulation code of above abnormalities will be freely available.

While substantial efforts on an understanding of ventricular fibrillation (VF) pathophysiology have reduced deaths from ventricular fibrillation and ventricular tachycardia (1), pulseless electrical activity (PEA) during years have been associated with poor outcome. The focus of treatment in ventricular fibrillation is delivering shock; treatment of underlying etiology comes in the next stage, whereas in PEA, primary and timely diagnosis of the underlying cause is acknowledged...

Electrocution is an important Issue in forensic and occupational medicine. In Addition to clectrical injuries, determining the manner of death and reasons of accident are very important. So during a 18 months period, all of such cases that referred to LMO for determining cause of death were studied. The results showed that the most common age range is 10-30 years old and the most common cause of Accident is occupational one.Ventricular fibrillation was the most prevalent cause of death the most dangerous situation was passing electrical current from right hand to legs.