Qais H. Alsafasfeh

Image Encryption Based on the General Approach for Multiple Chaotic Systems

In the recent years, researchers developed image encryption methods based on chaotic systems. This paper proposed new image encryption technique based on new chaotic system by adding two chaotic systems: the Lorenz chaotic system and the Rossler chaotic system. The main advantage of this technique is stronger security, as is shown in the encryption tests.

A New Chaotic Behavior from Lorenz and Rossler Systems and Its Electronic Circuit Implementation

This paper presents a new three-dimensional continuous autonomous chaotic system with ten terms and three quadratic nonlinearities. The new system contains five variational parameters and exhibits Lorenz and Rossler like attractors in numerical simulations. The basic dynamical properties of the new system are analyzed by means of equilibrium points, eigenvalue structures. Some of the basic dynamic behavior of the system is explored further investigation in the Lyapunov Exponent. The new system examined in Matlab-Simulink and Orcad-PSpice. An electronic circuit realization of the proposed system is presented using analog electronic elements such as capacitors, resistors, operational amplifiers and multipliers.

Economical evaluation for various renewable energy products in Jordan

This paper addresses the current status and the future potentials of renewable energy applications in Jordan, the data analysis shows that Solar is by far the renewable source with largest theoretical potential, with 1,642 GW, followed by wind, which potential is in the range of 182-319 GW potential of other renewable energies is comparative small like Biomass/Biogas potential is estimated at 30-50 MW. According to the analysis carried out, the maximum renewable energies grid can handle in 2020 is 1650 MW wind and 800 MW solar, within a confidence interval of 95%. Following economic criteria wind capacity is allocated first as is the most economic advantageous, followed by Photovoltaic and concentrated Solar Panel. Biomass will enter as plants are constructed. The Jordanian Government strategy targets the implementation of 1,800 MW of Renewable generation capacities by 2020. These will be split in 1,200 MW wind power plants, and 600 MW solar plants. The indicative prices of different renewable energy sources are presented. The Economic profitability indicators: Economic Net present Value (ENPV) and Economic Internal Rate of Return was presented in this paper.

Effect of dust on the 1-MW photovoltaic power plant at Tafila Technical University

In this work, the dust effect on the 1-MW photovoltaic power plant at Tafila Technical University has been evaluated. The evaluation of the dust effect was conducted to one zone (zone number two) out of twelve zones of the plant. Zone two has 606 photovoltaic modules and seven inverters with 22° tilt angle distributed on 986 m2. PVSyst Solar Simulator has been used to model and simulate the given zone of the plant. Using this software, the effect of dust and losses cost have been evaluated and estimated. Both the energy produced and the energy lost due to soiling and dust have been illustrated in graphical form. A recommendation has been given to decrease this loss of energy.

Risk-Constrained Optimal Energy Management for Virtual Power Plants Considering Correlated Demand Response

In this paper, we propose a new framework for the optimal virtual power plant (VPP) energy management problem considering correlated demand response (CDR). Our objective is to minimize the VPP operating cost while maintaining the power quality of the system. We formulate a risk-constrained two-stage stochastic program to address uncertainties in day-ahead and real-time electricity prices, renewable energy source’s generation processes, and the CDR relationship. The VPP can also maintain cooling and heating balances by coordinating combined cooling, heating, and power production and CDR units. Extensive simulation results show that the VPP can minimize the operating cost and ensure the energy balance and power quality by coordinating components in the framework we propose.

Study on the appropriate dimensions and position of slots and notches in the ground plane of planar monopole handset antenna for bandwidth enhancement

A slotted ground plane structure combined with a multiband planar monopole handset antenna for bandwidth enhancement and resonant modes tuning is presented. By simply inserting intelligent modifications using slots and notches to the system ground plane of an internal multiband handset antenna, a significant improvement in the bandwidths of lower bands LTE 700/GSM 850/GSM 900 and upper bands GSM 1800/1900, UMTS, LTE 2300/2500, WiMAX 3500, WLAN 2400/5200/5800 is achieved. The influences of the proposed slots and notches with different positions and dimensions on antenna performance are analyzed by means of simulations and parametric studies. Results show that the proposed ground plane modifications have improved the handset antenna performance to cover 12-band standard operations successfully.

Spatial Load Forecast and estimation of the peak electricity demand location for Tafila region

The aim of this paper is to provide a forecast of the peak demand for the next 15 years for electrical distribution companies in Tafila region of Jordan. The proposed methodology provides both the peak demand and its location for the next 15 years. This paper describes the Spatial Load Forecasting model used, the information provided by electrical distribution company in Jordan, the workflow followed, the parameters used and the assumptions made to run the model.