Publications

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2008
2009
Samir, P., K. Ashour, D. El-Sayed, A. E. 1 2 lsherpieny, 3Yassmen, and Y. Abdelall, "Parameter Estimation for Three-Parameter Kappa Distribution Under Type II Censored Samples", Journal of Applied Sciences Research, vol. 5, issue 10, pp. 1762-1766, 2009. CU-PDF.pdf
2010
A.sharaf, S.sedky, M.Serry, A.Elshurafa, M.Ashour, and S.E>Habib, "A Fully Symmetric and Completely Decoupled MEMS-SOI Gyroscope", A Fully Symmetric and Completely Decoupled MEMS-SOI Gyroscope, 2010. CU-PDF.pdf
Grace, S. R., M. Bohner, and S. Sun, "OSCILLATION OF FOURTH-ORDER DYNAMIC EQUATIONS", Hacettepe Journal of Mathematics and Statistics , vol. 39, issue 4, pp. 545 – 553, 2010. CU-PDF.pdf
Ibrahim, H. H., M. Tawfik, and H. M. Negm, "Thermal buckling and nonlinear flutter behavior of shape memory alloy hybrid composite plates", Journal of Vibration and Control, vol. 46, issue 3, 2010. Abstractcu_pdf.pdf

A new nonlinear finite element model is provided for the nonlinear flutter response of shape memory alloy (SMA) hybrid
composite plates under the combined effect of thermal and aerodynamic loads. The nonlinear governing equations for
moderately thick rectangular plates are obtained using first-order shear-deformable plate theory, von Karman straindisplacement
relations and the principle of virtual work. To account for the temperature dependence of material properties,
the thermal strain is stated as an integral quantity of thermal expansion coefficient with respect to temperature.
The aerodynamic pressure is modeled using the quasi-steady first-order piston theory. Newton-Raphson iteration
method is employed to obtain the thermal post-buckling deflection, while the linearized updated mode method is implemented
in predicting the limit-cycle oscillation at elevated temperatures. Numerical results are presented to show the
thermal buckling and flutter characteristics of SMA hybrid composite plates, illustrating the effect of the SMA volume fraction
and pre-strain value on the aero-thermo-mechanical response of such plates.

2011
Mahmoud, A. H. A., "an Analysis of Bioclimatic Zones and Implications for Design of Outdoor Environments in Egypt", Build Environ, 2011. Abstract

Climate considerations are essential dimensions in the assessment of quality of outdoor built environments. This paper provides an analysis of bioclimatic classification of Egypt to help the environmental design of wide range of purposes, including: climate responsive design; energy conservation and thermal comfort in the outdoor built environments. The analysis of this classification uses a bioclimatic approach in which the comfort zone and monthly climatic lines were determined and plotted on the psychrometric chart. Since the mean radiant temperature (Tmrt) is the most important input parameter for the energy balance in outdoor environments, the charts apply the ASHRAE 55-2004 standard considering the operative temperature as a function of Tmrt. Analysis for each bioclimatic zone determines the potential of passive design strategies to maintain thermal comfort in outdoor spaces and to contribute to energy efficient built environment. Finally, this study suggests a design guideline matrix for landscape architectural design for the different bioclimatic zones.

Kamel, T. S., M. M. A. Hassan, and A. El-Morshedy, "An Anfis Based Distance Relay Protection for Transmission Lines in Eps", International Journal of Innovations in Electrical Power systems, 2011. Abstract

The sophisticated Application of Soft computing Techniques and Artificial Intelligent Approaches were introduced recently in Protection of Transmission line in electric power systems. In this article, the application of one of the artificial intelligence techniques; which is Adaptive Neuro-Fuzzy Inference System (ANFIS); for Distance Relay Protection for Transmission line in Electrical Power systems (EPS) will be presented. The applied technique is concentrating on fault detection, classification, as well as fault location. These issues will be addressed in this article. The ANFIS can be viewed as a fuzzy system, a neural network or fuzzy neural network. This paper aims; firstly, to detect the fault occurrence in very short time using ANFIS, and isolate the faulty section of the transmission lines. Secondly to classify the fault type using ANFIS also, then decide which of the three phases are exposed to the fault. Finally, locating the fault will be achieved easily via ANFIS. The input data of the ANFIS are derived from the fundamental values of the voltage and current measurements using digital signal processing via Discrete Fourier Transform. However, the loading conditions over the protected transmission line are assumed to be nearly constant in this research.

Mahdy, A. M., "Assessment of Breakdown Voltage of Sf6/N2 Gas Mixture Under Non Uniform Field", IEEE T. on Dielectrics and Electrical Insulation, 2011. Abstract

The dielectric breakdown of SF6/N2 gas mixture insulating system is believed to be sensitive to local irregularity of the electric field which may result from the presence of defects such as contaminants adhering to the electrode surface and surface roughness. Normally the surface roughness is produced from machine finishing and due to the aging of the system. This paper models the insulation breakdown mechanism of SF6 gas mixture in the presence of surface roughness for non- uniform field gaps. The electric field inside the gap is computed by using the charge simulation method taking into consideration the perturbations of the field in the presence surface roughness. The breakdown voltage is assessed by applying the criterion of slightly and highly divergent field and using the experimental results of figure-of-merit which is a measure of quantifying of the sensitivity of the gas to the effects of the electrode surface roughness.

Mahmoud, A. H. A., and M. A. El-Sayed, "Development of Sustainable Urban Green Areas in Egyptian New Cities: the Case of El-Sadat City", Landscape Urban Plan, 2011. Abstract

Sustainable urban development is essential to enhance the quality of life of the citizens and to decrease the impact of cities upon resources outside the urban context. Redeveloping and planning green spaces and urban structure become the fundamentals of the sustainable urban planning of a city. An effective urban planning using recent technology is required to contribute to the physical and social development of the cities through promoting the land value and the local economy. This paper aims to develop a method to maintain ecological balance and organization of the urban green areas, using Geographic Information Systems (GIS) techniques that assist in effective planning of green areas. Land suitability analysis and ecological threshold methods based on GIS techniques are applied on one of the Egyptian new cities in a desert environment (i.e., El-Sadat City). Results revealed that the green ways could be developed to play a more significant role in bringing nature into the city. This paper suggests a method of green network planning that would help in enhancing the connectivity and reduce fragmentation though integrated greenway system. Finally, an ecological base for building an eco-city of El-Sadat City in the future is proposed.

M., S. H., Bayoumi, E. H. E., Kharnashawy, H., Al-Harthi, and M. M., "Disturbance-Rejection-Pid Controller for Flexible Arm Robot using Iterative Linear Matrix Inequality", Electromotion Scientific Journal, 2011. Abstract

In many practical robotic systems, large disturbances in the load are unavoidable. In this paper, a PID controller for a flexible arm robot is designed to satisfy the objectives :( 1) stability and H? performance specifications (disturbance rejection). Iterative linear matrix inequality technique is utilized to build an algorithm to calculate the parameters of the PID feedback controller. The proposed design is applied to practical industrial robot manipulator with load disturbances at the motor and the tool. The results show that the controller attenuates the effect of the disturbances in the output and provides a precise performance regarding the tool tracking.

Aboeleela, M., A. Fetoh, and A. B. Gamal, "Fuzzy Speed Controllers of Combined Cycle Power Plants", International Journal of Innovations in Electrical Power Systems, 2011. Abstract

This paper is focused on the implementation of fuzzy logic controllers and a combination between fuzzy logic control and proportional control to control the speed of a combined cycle electric power plant (CCPP). The system is simulated using Matlab/ Simulink and the fuzzy controller is implemented as a box in the simulation. Different types of the fuzzy controller have been tried in order to obtain the required speed response which achieves certain transient and steady state behavior.

Desoki, A., H. Morimura, and I. Hagiwara, "General Design of the Forming Collar of the Vertical Form, Fill and Seal Packaging Machine using the Finite Element Method", Packaging Technology and Science, 2011. Abstract

The basic part of the vertical form, fill and seal packaging machine is the forming collar. The forming collar provides the shape over which packaging film is smoothly formed at high speed into a cylindrical shape. Describing the forming collar geometry and hence its design is, however, remarkably difficult. This paper presents, for the first time, a flexible methodology for calculating the complete geometry of the film rather than the usually non-complete collar over which the film is formed. That is, a methodology to calculate the film geometry over the collar including the seam along which the film is longitudinally sealed. The film geometry is calculated such that it has minimum deformation energy. Advantages of the proposed methodology include its great flexibility to generate collars with different configurations for different needs. Among the collar generation methods reviewed, the proposed methodology is the first that can systematically consider all collar configuration parameters such as the seam configuration, general package cross-section, flat or straight part of the collar, collar back angle, etc. A means for obtaining the exact collar geometry is also demonstrated. This enables right-first-time and repeatable collar production and reduces the time and cost for producing next generation packaging machines.

Ahmed, M. R., M. M. Abdelrahman, and E. - G. M. Bayoumi, "Optimal Wing Twist Distribution for Roll Control of Mavs", Aeronaut J., 2011.
Elkaranshway, H. A., E. H. E. Bayoumi, and H. M. Soliman, "PSO-based Robust PID Control for Flexible Manipulator Systems", Int. J. Modelling, 2011. Abstract

In this paper, a new control law is designed for flexible manipulator systems. Kharitonov theorem is used as a design tool to derive the robust control in robotic systems. Stability is guaranteed not only at one operating condition but also for a wide range of system uncertainty. Both the non-linear behaviour of the gearbox stiffness and the end load variations are tackled as interval uncertainties in the model. Particle swarm optimisation (PSO) is used to tune controller parameters, such that, the greatest real parts of closed loop eigenvalues among Kharitonov-extreme polynomials is minimised to assure the highest possible relative stability.

Fouad, H. W. F., Moustafa, T. M., and S. A., "Steady State Simulation of A Novel Process for the Co-Production of Vinyl Acetate and Acetic Acid", Journal of Chemistry and Chemical Engineering, 2011. Abstract

A new process for the co-production of vinyl acetate monomer and acetic acid from ethane feedstock was studied. Various configurations were proposed and simulation results were given for each case to optimize process variables. This new process offers an overall yield values above 70% with minimum separation steps involved and the possibility of utilities integration. The process does not involve any CO production, thus becoming environmentally more favorable. The initial capital investment of the proposed process is much lower compared to the conventional route.

Gabr, S. A. E. M., M. M. A. Hassan, and O. Y. Abul-Haggag, "Stochastic Modeling Compared with Artificial Intelligence Based Approach for Electrical Load Forecasting", Journal of American Science, 2011. Abstract

Accurate load forecasting is very important for electric utilities in planning for new plants. Also it is very significant for the routine of maintaining, scheduling daily, electrical generation, and loads. In this study, emphasis was considered on short-term load forecasting which is important for real time operation and control of power systems. Artificial intelligence and stochastic forecasting models were examined. The performance of these models is dependent on the characteristics of electric loads and is based on the assumption that electric load patterns are basically invariant with time. Two different models were considered and a new stochastic model (called REGARIMA) was introduced and compared with ANFIS model. Both models were tested and shown to be the best one that represents the available data. The results obtained using the two approaches are very accurate and mutually competitive. Furthermore, they are very promising in short term forecasting techniques, which could be applied as well on wind speed forecasting.

El-Gawad, A. E. M., M. M. A. Hassan, M. A. M. Hallouda, and O. Y. Abul-Haggag, "Stochastic Modeling Compared with Artificial Intelligence Based Approach for Short Term Wind Speed Forecasting", Journal of American Science, 2011. Abstract

The sophisticated Application of Artificial Intelligent Approaches was introduced recently in renewable energy in electric power systems. However, these approaches started with introducing Fuzzy Logic (FL) in the last decades of the last century. Furthermore, Artificial Neural Network (ANN) was introduced to solve many problems in electric power systems. Among these problems is forecasting of wind speed.

IBRAHIM, M. K., S. Matsumoto, K. Mori, and Y. Nakamura, "Visualization of Pressure Field Over Rotating Blades Using Pressure Sensitive Foil Technique", T. Jpn Soc Aeronaut S, 2011. Abstract

This paper describes a new pressure measurement technique for measuring the pressure over rotating blades of an industrial axial flow fan. The new technique is called the pressure sensitive foil (PS-Foil) technique. In this technique, a very thin aluminum foil is coated with pressure sensitive paint using anodization. The resulting PS-Foil can be stuck on any blade using a very thin layer of silicon. The PS-Foil technique shows a very fast time response like conventional porous anodized aluminum and can be applied to any rotor blade without fabricating the blade from aluminum. The total thickness of the aluminum foil and silicon layer is as small as 200 mm. An intensity based method and prior calibration procedures are used to obtain the calibrated PSP image. The unsteady experimental setup presented here shows that the PS-Foil time response is on the order 30 ms which is close to the conventional porous anodized aluminum method. Two applications are considered here to assess the applicability of this technique. Subsonic jet-plate impingement, and rotating blade of industrial fan. The pressure distribution over the impingement plate at different plate angles, and over the rotating blade at various speeds could be obtained with sufficient spatial resolution.

Said, L. A., A. Soliman, and A. Madian, "Active Circuits: Active Realization of Doubly Terminated LC Ladder Filters Using Active Building Blocks [Paperback]", LAP Lambert Academic Publishing GmbH & Co. KG, 2011. Abstractcu_pdf1.pdf

Analog designs have been viewed as a voltage dominated form of signal processing for a long time. However current-mode signal processing circuits have been preferred over the voltage-mode signal processing circuits due to their advantages such as higher signal bandwidth, larger dynamic range, greater linearity, lower power consumption, and simpler circuitry. Designs for active realizations of passive elements using high performance active devices are a rich area of research; many active elements have been used to simulate the inductor part in doubly terminated ladder filters. The researcher here try to contribute in this filed.

Soliman, A. M., "Analog Circuits: Applications, Design and Performance Chapter 4 Tran conductance Amplifiers: Nam Realizations and Applications", Nova Science Publisher, 2011. Abstractcu_pdf.pdf

A systematic generation method of the single input single output transconductance amplifier (TA) based on using nodal admittance matrix (NAM) expansion is given. The four pathological elements used are the nullator, norator, voltage mirror (VM) and current mirror (CM). The single input single output TA also known as the voltage controlled current source (VCCS) includes two types depending on the direction of the output current. Two pathological realizations for each type using grounded resistor are given and eight pathological realizations for each type using floating resistor are also derived. Applications of TA in realizing grounded and floating resistors, grounded and floating inductors, first order voltage mode and current mode all pass filters, Tow Thomas second order filter, universal second order voltage mode and mixed mode filter using five single input differential output TA and one single input single output TA and oscillators using a single input single output TA are included.

Hassan, A. - K. S. O., M. A. El-Gamal, and A. A. I. Ibrahim, "APPLICATION OF CONIC OPTIMIZATION AND SEMIDEFINITE PROGRAMMING IN CLASSIFICATION", IJRRAS, vol. 6, issue 3, pp. 277-283, 2011. CU-PDF
Emarah, D. A., M. M. Hussein, H. M. Mousa, and A. Y. Akl, "The Application of Fuzzy Modeling to Hazard Assessment for Reinforced Concrete Building Structures Due to Pipeline Failure", Life Science Journal, vol. 8, issue 4, 2011. CU-PDF.pdf
Mohsen, A., R. Piscoya, and M. Ochmann, "The Application of the Dual Surface Method to Treat the Nonuniqueness in Solving Acoustic Exterior Problems", Acta Acustica united with Acustica,, vol. 97, issue 4, pp. 699-707, 2011. CU-PDF.pdf
Rady, E. - H. A. B., A. A. El-Sheikh, and M. A. ould Oumar, AWealth Index of Households Living Conditions in Mauritania, , 2011. CU-PDF.pdf
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