Publications

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Journal Article
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.

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.

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
Kamel, A. E. - H. M., D. M. A. H. Mohamed, D. H. M. Ismail, and D. A. K. Kassem, Applications of LIBS and LIF Techniques in the Diagnosis of Breast and Colorectal Human Cancer (In Vitro Study), , 2012. cu-pdf.pdf
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.

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
Marzouk, M. M., and R. M. Ahmed, "A case-based reasoning approach for estimating the costs of pump station projects", Journal of Advanced Research, vol. 2, issue 4, pp. 289–295, 2011. CU-PDF.pdf
Ossama, O., H. M. O. Mokhtar, and M. E. El-Sharkawi, "Clustering Moving Objects Using Segments Slopes", International Journal of Database Management Systems, vol. 3, issue 1, 2011. AbstractCu_pdf.pdf

Given a set of moving object trajectories, we show how to cluster them using k-means
clustering approach. Our proposed clustering algorithm is competitive with the k-means clustering
because it specifies the value of “k” based on the segment’s slope of the moving object trajectories. The
advantage of this approach is that it overcomes the known drawbacks of the k-means algorithm, namely,
the dependence on the number of clusters (k), and the dependence on the initial choice of the clusters’
centroids, and it uses segment’s slope as a heuristic to determine the different number of clusters for the
k-means algorithm. In addition, we use the standard quality measure (silhouette coefficient) in order to
measure the efficiency of our proposed approach. Finally, we present experimental results on both real
and synthetic data that show the performance and accuracy of our proposed technique.

Osman, H., and K. Bainbridge, "Comparison of Statistical Deterioration Models for Water Distribution Networks", Journal of Performance of Constructed Facilities, vol. 25, issue 3, pp. 259-266, 2011. Abstract

The use of water main break history as a proxy for condition has become common practice because of the high costs associated with direct assessments. Statistical deterioration models predict future water main breaks on the basis of historical patterns. Many municipalities are beginning to understand the value of utilizing water pipe break histories to manage their noncritical distribution networks via deterioration models. This paper presents a generic IDEF0 process model for developing water main deterioration models. Two common statistical deterioration models for water pipes are compared: rate-of-failure models (ROF) and transition-state (TS) models. ROF models extrapolate the breakage rate for a particular cohort of pipes and do not differentiate between the times between successive failures. On the other hand, transition-state models attempt to model the time between successive failures for pipes. This paper presents a comparison and analysis of ROF models and transition-state models by using a single data set for cast- and ductile-iron pipes in the City of Hamilton, Ontario, Canada. The paper compares the models’ ability to support breakage forecasting, long-term strategic planning, and short-term tactical planning. Best practices for pipe segmentation in support of water main deterioration models are presented.

Abuelfadl, T. M., "Composite right/left-handed circular meta-waveguide ", Appl Phys , vol. 103, pp. 759–763, 2011. CU-PDF.pdf
Yao, C. - W., B. - D. Hsu, and B. - S. Chen, "Constructing gene regulatory networks for long term photosynthetic light acclimation in Arabidopsis thaliana", BMC Bioinformatics 2011, vol. 12:335, 2011. CU-PDF.pdf
Bayoumi, E. H. E., M. Awadallah, and H. Soliman, "Deadbeat Performance of Vector-Controlled Induction Motor Drives Using Particle Swarm Optimization and Adaptive Neuro-Fuzzy Inference Systems", Electromotion Scientific Journal, vol. 18, issue 4, pp. 231 - 242, 2011. Abstractcu_pdf.pdf

The paper presents a design technique for adaptive PI current and speed controllers maintaining deadbeat response in vector-controlled induction motor drives. The proposed design is based on particle swarm optimization (PSO) and adaptive neuro-fuzzy inference systems (ANFIS).

El-Maghrabi, H. M., A. M. Attiya, and E. A. Hashish, "Design of A Perfect Electromagnetic Conductor (PEMC) Boundary by using Periodic Patches", Progress In Electromagnetic Research M, vol. 16, pp. 159-169, 2011. AbstractCU-PDF

Perfect electromagnetic conductor (PEMC) is a novel concept in electromagnetic fields of interesting properties and many potential applications. This paper introduces a new technique to design an artificial surface that has equivalent PEMC properties. The proposed PEMC boundary is based on a periodic structure composed of two conducting patches on a grounded dielectric slab. One of them is embedded inside the substrate and the other lies on the surface of the substrate.

EL-NAGGAR, S. A. H. A. R. A., N. A. D. I. A. H. RAFAT, and S. A. M. I. A. I. MOSTAFA, "Design of photonic band gap in one-dimensional SiO2/a-Si photonic crystals", JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, vol. 13, issue 7, pp. 781 - 785, 2011. CU-PDF.pdf
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.

MT, H., S. AM, S. NP, and A. WA, "Discrete fractional Fourier transform as a fast algorithm for evaluating the diffraction pattern of pulsed radiation", J Opt Soc Am A Opt Image Sci Vis, vol. 1;28(8), pp. 1610-9, 2011. CU-PDF.pdf
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.

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