raied jamal | University of Baghdad (original) (raw)

Papers by raied jamal

Research paper thumbnail of Studying the Effect of Initial Conditions and System Parameters on the Behavior of a Chaotic Duffing System

Iraqi Journal of Physics

This work presents a five-period chaotic system called the Duffing system, in which the effect of... more This work presents a five-period chaotic system called the Duffing system, in which the effect of changing the initial conditions and system parameters d, g and w, on the behavior of the chaotic system, is studied. This work provides a complete analysis of system properties such as time series, attractors, and Fast Fourier Transformation Spectrum (FFT). The system shows periodic behavior when the initial conditions xi and yi equal 0.8 and 0, respectively, then the system becomes quasi-chaotic when the initial conditions xi and yi equal 0 and 0, and when the system parameters d, g and w equal 0.02, 8 and 0.09. Finally, the system exhibits hyperchaotic behavior at the first two conditions, 0 and 0, and the bandwidth of the chaotic signal becomes wider (2 a.u.) than in the first case. So, this system can be used in many physical applications, such as encrypting confidential information.

Research paper thumbnail of A novel technique for encoding images using Chen model and computer-generated holograms

In this work, computer-generated hologram technology was used to encode information and link it t... more In this work, computer-generated hologram technology was used to encode information and link it to one of the chaotic system models (Chen), using the Matlab program. The results showed that the information (images) can be easily identified using computer-generated holograms through the process of computer holographic reconstruction of the images to be encrypted, and this process is undesirable in secure communications, But when linking with the chaotic Chen system through several mathematical operations including addition, multiplication and division, the resulting holograms of the image to be encrypted and the hologram of the Chen system, where the results showed complete encryption of the images to be encrypted and the disappearance of their features using the division process.

Research paper thumbnail of A novel technique in encryption information based on Chaos–hologram

Research paper thumbnail of Bolometric properties of uncooled semiconductor carbon nanotubes

Research paper thumbnail of A Comprehensive Study and Analysis of the Chaotic Chua Circuit

Iraqi journal of science, Feb 26, 2022

was studied by taking several different values for the constant α and fixing the other three vari... more was studied by taking several different values for the constant α and fixing the other three variables β, c and d with the values 25.58,-0.7142857, and-1.142, respectively. The purpose of this paper is to know the values by which the system transforms from a steady state to a chaotic state under the initial conditions x, y, and z that equal-1.6, 0 and 1.6 respectively. It was found that when the value of α is equal to 0, the Chua system is in a steady state, and when the value of α is equal to 9.5 and the wave is sinusoidal, the system is in oscillation, and when α is equal 13.4 the system is in a Quasi-chaotic state, and finally the system turns to the chaotic state when the value of α equals 15.05.

Research paper thumbnail of Chaos–hologram: a novel technique in encryption information

In this work, hologram-chaos technique was used to encrypt information as one of the hologram app... more In this work, hologram-chaos technique was used to encrypt information as one of the hologram applications using MATLAB program. The results showed that the information to be transmitted in complete secrecy can be easily identified using computer generated holograms through the process of computer hologram reconstruction, so this technique is not able to guarantee the confidentiality of information transmission. When coupling the hologram technology with the chaotic Lorenz system by performing several arithmetic operations of addition, multiplication and division for the matrices of Fourier transforms of the information to be sent (the Mona Lisa image) and the hologram of the Lorenz system, the results showed a complete encryption of the images to be sent and the disappearance of their features using the division process.

Research paper thumbnail of Generating a novel chaotic system by coupling (Rossler-Chen) systems

In this work, a novel chaotic system with a new chaotic behavior is proposed when two chaotic sys... more In this work, a novel chaotic system with a new chaotic behavior is proposed when two chaotic systems (Rossler and Chen) with two different behaviors are combined. The x1, y1 and z1 dynamics of the Rӧssler system was coupled with x2,y2 and z2 dynamics of the Chen system respectively. The Berkeley Madonna program was used to implement and analyze the behavior of the novel chaotic system. The novel chaotic system presented a fundamental difference in the time series of the three dynamics and also a difference in the attractors compared to the time series and the attractors of the two original systems, where the output behavior of a novel chaotic system was almost double scrolling and hyper chaotic behavior. When examining the fast Fourier transformation spectra, it was found that the behavior of the novel chaotic system has a wider bandwidth than the initial state, which means that the Chen system affected the Rossler system significantly and increased the efficiency of the work of th...

Research paper thumbnail of Fabrication of a novel solar cell using copper phthalocyanine tetrasulfonic acid tetrasodium salt / graphene oxide

Research paper thumbnail of A novel secure communication system using Chen's chaotic model

Optical and Quantum Electronics

Research paper thumbnail of Space phase inversions and initial conditions of Chen Model

In this work, an eight-term chaos system is presented. The effect of changing the initial conditi... more In this work, an eight-term chaos system is presented. The effect of changing the initial conditions values on behavior Chen system was studied. The research provided a complete analysis of the system properties such as time series, attractor, FFT spectrum and bifurcation. Where the system appears steady state behavior at initial conditions x i, y i , z i that equal (0, 0, 0) respectively and it convert to quasi-chaotic at x i , y i , z i equal (-0.1, 0.5,-0.6). Finally, the system become hyper chaotic at x i , y i , z i equal (-1, 0.5,-0.6) that can used it in many applications like secure communication.

Research paper thumbnail of A novel synchronization between two different chaotic systems (Convert Lorenz chaotic system to Chua chaotic system)

In this work, a new synchronization was achieved between two different chaotic systems in behavio... more In this work, a new synchronization was achieved between two different chaotic systems in behavior (Chua-Lorenz) by coupling them together with a coupling factor (k) and it was noted that Lorenz's behavior completely transformed Chua's behavior by changing the value of this factor. It is observed that when the values of the coupling factor are zero, the two systems are asynchronous, and when its value is 100, there is partial synchronization, while its value is 100000, so we get perfect synchronization. Where it is possible to use this synchronization in the field of secure communications.

Research paper thumbnail of Nano-Scale core effects on electronic structure properties of gallium arsenide

Key words Ab – initio density function theory (DFT) calculations coupled with Large Unit Cell (LU... more Key words Ab – initio density function theory (DFT) calculations coupled with Large Unit Cell (LUC) method were carried out to evaluate the electronic structure properties of III-V zinc blend (GaAs). The nano – scale that have dimension (1.56-2.04)nm. The Gaussian 03 computational packages has been employed through out this study to compute the electronic properties include lattice constant, energy gap, valence and conduction band width, total energy, cohesive energy and density of state etc. Results show that the total energy and energy gap are decreasing with increase the size of nano crystal . Results revealed that electronic properties converge to some limit as the size of LUC increase . Ab-initio density Function theory , Nano – scale , Electronic structure

Research paper thumbnail of Enhanced of the Two photon Absorption in Nanostructure Wide Band gap Semiconductor CdS using femtosecond Laser

We observed strong nonlinear absorption in the CdS nanoparticles of dimension in the range 50-100... more We observed strong nonlinear absorption in the CdS nanoparticles of dimension in the range 50-100 nm when irradiant with femtosecond pulsed laser at 800 nm and 120 GW/cm 2 irradiance intensity. The repetition rate and average power were 250 kHz and 30 mW. The CdS nanoparticles sizes were controlled by reaction time of S-olylamine and Cdalylamine components interacting at 300 o C. The structures of the prepared CdS nanoparticles was tested and its optical properties were investigated. The nonlinear absorption coefficient was measured using a fully computerized z-scan unit. The results show the value of ß is in order of 116 cm/GW. This value is in a good agreement with values mentioned by other studies. Keyword: Nonlinear optics, Nanostructure semiconductor. ـمل ةعساولا ةقاطلا ةوجف تاذ تلاصوملا هابشلال ويونانلا بيكا رتلا يف يئانثلا ينوتوفلا صاصتملاا ةيممع نيسحت CdS ةيناث وتمفلا تاضبنلا تاذ يضبن رزيل مادختساب لامج لماك دئا ر دحاولا دبع مظاك ديمح للها دبع دمحم دادغب ةعماج مومعلا ةيمك ءا...

Research paper thumbnail of Space phase inversions and initial conditions of the Chen

Optical and Quantum Electronics

Research paper thumbnail of Increasing the conversion efficiency of KTP crystal using the pump-power technique

Iraqi Journal of Physics, 2020

In this study, the effect of pumping power on the conversion efficiency of nonlinear crystal (KTP... more In this study, the effect of pumping power on the conversion efficiency of nonlinear crystal (KTP) was investigated using laser pump-power technique. The results showed that the higher the pumping power values, the greater the conversion efficiency (η) and, as the crystal thickness increases within limitations, the energy conversion efficiency increases at delay time of (0.333 ns) and at room temperature. Efficiency of 80% at length of KTP crystal (L = 1.75 X 10-3 m) and Pin = 28MW, and also, compare the experimental results with numerical results by using MATLAB program.

Research paper thumbnail of Studying the Effect of Laser Pump Pulse Energy and Delay Time on Conversion Efficiency of KTP

Iraqi Journal of Science, 2020

In this study, the effect of increasing pump pulse energy and delay time on the energy conve... more In this study, the effect of increasing pump pulse energy and delay time on the energy conversion efficiency of the Potassium Titanyl Phosphate (KTP) crystal at room temperature was investigated. It was found that the higher the pump pulse the greater the efficiency at a certain value of the delay time. Moreover, at the delay time 3.524ns, we found that the efficiency of the conversion of energy increases from 0.0112 to 0.0159. We also observed that the lower delay time between the pump and the probe pulses leads to increase the rate of energy conversion efficiency of the KTP crystal, where the reaches up to 3, which is higher than the value recorded in the absence of a pump pulse. The highest value of the rate of energy conversion efficiency recorded in this study was 0.0159. This work was achieved at room temperature.

Research paper thumbnail of Secure Communication Coupled semiconductor Laser Based on Rössler Chaotic Circuits

IOP Conference Series: Materials Science and Engineering, 2019

Research paper thumbnail of Hydrogen gas sensors based on electrostatically spray deposited nickel oxide thin film structures

Research paper thumbnail of Ab-initio density function theory used to studying the electronic properties of Indium Arsenide nanocrystal

ABSTRACT The electronic properties such as energy gap, total energy, lattice constant, cohesive e... more ABSTRACT The electronic properties such as energy gap, total energy, lattice constant, cohesive energy, and density of states have been studied for InAs nanocrystal, with dimension (1.17-2.32)nm. Ab-initio density functional theory (DFT) at the generalized – gradient approximation (GGA) level coupled with large unit cell (LUC) method were carried out to determine these properties. The Gaussian 03 package of restricted Hartree-Fock method is used throughout this study. The results show that the energy gap and cohesive energy decreases with the increasing of the size of nanocrystal. Also, we found the density of states to increase with increasing of number of core atoms.

Research paper thumbnail of Electrical properties of pure NiO and NiO:Au thin films prepared by using pulsed laser deposition ‫المحضرة‬ ‫بالذھب‬ ‫والمشوب‬ ‫النقي‬ ‫النيكل‬ ‫الوكسيد‬ ‫الرقيقة‬ ‫لالغشية‬ ‫الكھربائية‬ ‫الخواص‬ ‫النبضي‬ ‫الليزر‬ ‫ترسيب‬ ‫باستخدام‬

Key words The electrical properties of pure NiO and NiO:Au Films which are deposited on glass sub... more Key words The electrical properties of pure NiO and NiO:Au Films which are deposited on glass substrate with various dopant concentrations (1wt.%, 2wt%, 3wt.% and 4wt.%) at room temperature 450 C o annealing temperature will be presented. The results of the hall effect showed that all the films were p-type. The Hall mobility decreases while both carrier concentration and conductivity increases with the increasing of annealing temperatures and doping percentage, Thus, indicating the behavior of semiconductor, and also the D.C conductivity from which the activation energy decrease with the doping concentration increase and transport mechanism of the charge carriers can be estimated. NiO:Au, thin films, Pulsed laser deposition. Article info. ‫رائد‬ ‫ناجي‬ ‫ايمان‬ ،‫جمال‬ ‫كامل‬ ‫العراق‬ ،‫بغداد‬ ،‫بغداد‬ ‫جامعة‬ ،‫العلوم‬ ‫كلية‬ ،‫الفيزياء‬ ‫قسم‬ ‫الخالصة‬ ‫بتراكيز‬ ‫الزجاج‬ ‫على‬ ‫المرسبة‬ ‫بالذھب‬ ‫والمشوب‬ ‫النقي‬ ‫النيكل‬ ‫الوكسيد‬ ‫الرقيقة‬ ‫لالغشية‬ ‫الكھربائية‬ ‫الخواص‬ ‫مختلفه‬...

Research paper thumbnail of Studying the Effect of Initial Conditions and System Parameters on the Behavior of a Chaotic Duffing System

Iraqi Journal of Physics

This work presents a five-period chaotic system called the Duffing system, in which the effect of... more This work presents a five-period chaotic system called the Duffing system, in which the effect of changing the initial conditions and system parameters d, g and w, on the behavior of the chaotic system, is studied. This work provides a complete analysis of system properties such as time series, attractors, and Fast Fourier Transformation Spectrum (FFT). The system shows periodic behavior when the initial conditions xi and yi equal 0.8 and 0, respectively, then the system becomes quasi-chaotic when the initial conditions xi and yi equal 0 and 0, and when the system parameters d, g and w equal 0.02, 8 and 0.09. Finally, the system exhibits hyperchaotic behavior at the first two conditions, 0 and 0, and the bandwidth of the chaotic signal becomes wider (2 a.u.) than in the first case. So, this system can be used in many physical applications, such as encrypting confidential information.

Research paper thumbnail of A novel technique for encoding images using Chen model and computer-generated holograms

In this work, computer-generated hologram technology was used to encode information and link it t... more In this work, computer-generated hologram technology was used to encode information and link it to one of the chaotic system models (Chen), using the Matlab program. The results showed that the information (images) can be easily identified using computer-generated holograms through the process of computer holographic reconstruction of the images to be encrypted, and this process is undesirable in secure communications, But when linking with the chaotic Chen system through several mathematical operations including addition, multiplication and division, the resulting holograms of the image to be encrypted and the hologram of the Chen system, where the results showed complete encryption of the images to be encrypted and the disappearance of their features using the division process.

Research paper thumbnail of A novel technique in encryption information based on Chaos–hologram

Research paper thumbnail of Bolometric properties of uncooled semiconductor carbon nanotubes

Research paper thumbnail of A Comprehensive Study and Analysis of the Chaotic Chua Circuit

Iraqi journal of science, Feb 26, 2022

was studied by taking several different values for the constant α and fixing the other three vari... more was studied by taking several different values for the constant α and fixing the other three variables β, c and d with the values 25.58,-0.7142857, and-1.142, respectively. The purpose of this paper is to know the values by which the system transforms from a steady state to a chaotic state under the initial conditions x, y, and z that equal-1.6, 0 and 1.6 respectively. It was found that when the value of α is equal to 0, the Chua system is in a steady state, and when the value of α is equal to 9.5 and the wave is sinusoidal, the system is in oscillation, and when α is equal 13.4 the system is in a Quasi-chaotic state, and finally the system turns to the chaotic state when the value of α equals 15.05.

Research paper thumbnail of Chaos–hologram: a novel technique in encryption information

In this work, hologram-chaos technique was used to encrypt information as one of the hologram app... more In this work, hologram-chaos technique was used to encrypt information as one of the hologram applications using MATLAB program. The results showed that the information to be transmitted in complete secrecy can be easily identified using computer generated holograms through the process of computer hologram reconstruction, so this technique is not able to guarantee the confidentiality of information transmission. When coupling the hologram technology with the chaotic Lorenz system by performing several arithmetic operations of addition, multiplication and division for the matrices of Fourier transforms of the information to be sent (the Mona Lisa image) and the hologram of the Lorenz system, the results showed a complete encryption of the images to be sent and the disappearance of their features using the division process.

Research paper thumbnail of Generating a novel chaotic system by coupling (Rossler-Chen) systems

In this work, a novel chaotic system with a new chaotic behavior is proposed when two chaotic sys... more In this work, a novel chaotic system with a new chaotic behavior is proposed when two chaotic systems (Rossler and Chen) with two different behaviors are combined. The x1, y1 and z1 dynamics of the Rӧssler system was coupled with x2,y2 and z2 dynamics of the Chen system respectively. The Berkeley Madonna program was used to implement and analyze the behavior of the novel chaotic system. The novel chaotic system presented a fundamental difference in the time series of the three dynamics and also a difference in the attractors compared to the time series and the attractors of the two original systems, where the output behavior of a novel chaotic system was almost double scrolling and hyper chaotic behavior. When examining the fast Fourier transformation spectra, it was found that the behavior of the novel chaotic system has a wider bandwidth than the initial state, which means that the Chen system affected the Rossler system significantly and increased the efficiency of the work of th...

Research paper thumbnail of Fabrication of a novel solar cell using copper phthalocyanine tetrasulfonic acid tetrasodium salt / graphene oxide

Research paper thumbnail of A novel secure communication system using Chen's chaotic model

Optical and Quantum Electronics

Research paper thumbnail of Space phase inversions and initial conditions of Chen Model

In this work, an eight-term chaos system is presented. The effect of changing the initial conditi... more In this work, an eight-term chaos system is presented. The effect of changing the initial conditions values on behavior Chen system was studied. The research provided a complete analysis of the system properties such as time series, attractor, FFT spectrum and bifurcation. Where the system appears steady state behavior at initial conditions x i, y i , z i that equal (0, 0, 0) respectively and it convert to quasi-chaotic at x i , y i , z i equal (-0.1, 0.5,-0.6). Finally, the system become hyper chaotic at x i , y i , z i equal (-1, 0.5,-0.6) that can used it in many applications like secure communication.

Research paper thumbnail of A novel synchronization between two different chaotic systems (Convert Lorenz chaotic system to Chua chaotic system)

In this work, a new synchronization was achieved between two different chaotic systems in behavio... more In this work, a new synchronization was achieved between two different chaotic systems in behavior (Chua-Lorenz) by coupling them together with a coupling factor (k) and it was noted that Lorenz's behavior completely transformed Chua's behavior by changing the value of this factor. It is observed that when the values of the coupling factor are zero, the two systems are asynchronous, and when its value is 100, there is partial synchronization, while its value is 100000, so we get perfect synchronization. Where it is possible to use this synchronization in the field of secure communications.

Research paper thumbnail of Nano-Scale core effects on electronic structure properties of gallium arsenide

Key words Ab – initio density function theory (DFT) calculations coupled with Large Unit Cell (LU... more Key words Ab – initio density function theory (DFT) calculations coupled with Large Unit Cell (LUC) method were carried out to evaluate the electronic structure properties of III-V zinc blend (GaAs). The nano – scale that have dimension (1.56-2.04)nm. The Gaussian 03 computational packages has been employed through out this study to compute the electronic properties include lattice constant, energy gap, valence and conduction band width, total energy, cohesive energy and density of state etc. Results show that the total energy and energy gap are decreasing with increase the size of nano crystal . Results revealed that electronic properties converge to some limit as the size of LUC increase . Ab-initio density Function theory , Nano – scale , Electronic structure

Research paper thumbnail of Enhanced of the Two photon Absorption in Nanostructure Wide Band gap Semiconductor CdS using femtosecond Laser

We observed strong nonlinear absorption in the CdS nanoparticles of dimension in the range 50-100... more We observed strong nonlinear absorption in the CdS nanoparticles of dimension in the range 50-100 nm when irradiant with femtosecond pulsed laser at 800 nm and 120 GW/cm 2 irradiance intensity. The repetition rate and average power were 250 kHz and 30 mW. The CdS nanoparticles sizes were controlled by reaction time of S-olylamine and Cdalylamine components interacting at 300 o C. The structures of the prepared CdS nanoparticles was tested and its optical properties were investigated. The nonlinear absorption coefficient was measured using a fully computerized z-scan unit. The results show the value of ß is in order of 116 cm/GW. This value is in a good agreement with values mentioned by other studies. Keyword: Nonlinear optics, Nanostructure semiconductor. ـمل ةعساولا ةقاطلا ةوجف تاذ تلاصوملا هابشلال ويونانلا بيكا رتلا يف يئانثلا ينوتوفلا صاصتملاا ةيممع نيسحت CdS ةيناث وتمفلا تاضبنلا تاذ يضبن رزيل مادختساب لامج لماك دئا ر دحاولا دبع مظاك ديمح للها دبع دمحم دادغب ةعماج مومعلا ةيمك ءا...

Research paper thumbnail of Space phase inversions and initial conditions of the Chen

Optical and Quantum Electronics

Research paper thumbnail of Increasing the conversion efficiency of KTP crystal using the pump-power technique

Iraqi Journal of Physics, 2020

In this study, the effect of pumping power on the conversion efficiency of nonlinear crystal (KTP... more In this study, the effect of pumping power on the conversion efficiency of nonlinear crystal (KTP) was investigated using laser pump-power technique. The results showed that the higher the pumping power values, the greater the conversion efficiency (η) and, as the crystal thickness increases within limitations, the energy conversion efficiency increases at delay time of (0.333 ns) and at room temperature. Efficiency of 80% at length of KTP crystal (L = 1.75 X 10-3 m) and Pin = 28MW, and also, compare the experimental results with numerical results by using MATLAB program.

Research paper thumbnail of Studying the Effect of Laser Pump Pulse Energy and Delay Time on Conversion Efficiency of KTP

Iraqi Journal of Science, 2020

In this study, the effect of increasing pump pulse energy and delay time on the energy conve... more In this study, the effect of increasing pump pulse energy and delay time on the energy conversion efficiency of the Potassium Titanyl Phosphate (KTP) crystal at room temperature was investigated. It was found that the higher the pump pulse the greater the efficiency at a certain value of the delay time. Moreover, at the delay time 3.524ns, we found that the efficiency of the conversion of energy increases from 0.0112 to 0.0159. We also observed that the lower delay time between the pump and the probe pulses leads to increase the rate of energy conversion efficiency of the KTP crystal, where the reaches up to 3, which is higher than the value recorded in the absence of a pump pulse. The highest value of the rate of energy conversion efficiency recorded in this study was 0.0159. This work was achieved at room temperature.

Research paper thumbnail of Secure Communication Coupled semiconductor Laser Based on Rössler Chaotic Circuits

IOP Conference Series: Materials Science and Engineering, 2019

Research paper thumbnail of Hydrogen gas sensors based on electrostatically spray deposited nickel oxide thin film structures

Research paper thumbnail of Ab-initio density function theory used to studying the electronic properties of Indium Arsenide nanocrystal

ABSTRACT The electronic properties such as energy gap, total energy, lattice constant, cohesive e... more ABSTRACT The electronic properties such as energy gap, total energy, lattice constant, cohesive energy, and density of states have been studied for InAs nanocrystal, with dimension (1.17-2.32)nm. Ab-initio density functional theory (DFT) at the generalized – gradient approximation (GGA) level coupled with large unit cell (LUC) method were carried out to determine these properties. The Gaussian 03 package of restricted Hartree-Fock method is used throughout this study. The results show that the energy gap and cohesive energy decreases with the increasing of the size of nanocrystal. Also, we found the density of states to increase with increasing of number of core atoms.

Research paper thumbnail of Electrical properties of pure NiO and NiO:Au thin films prepared by using pulsed laser deposition ‫المحضرة‬ ‫بالذھب‬ ‫والمشوب‬ ‫النقي‬ ‫النيكل‬ ‫الوكسيد‬ ‫الرقيقة‬ ‫لالغشية‬ ‫الكھربائية‬ ‫الخواص‬ ‫النبضي‬ ‫الليزر‬ ‫ترسيب‬ ‫باستخدام‬

Key words The electrical properties of pure NiO and NiO:Au Films which are deposited on glass sub... more Key words The electrical properties of pure NiO and NiO:Au Films which are deposited on glass substrate with various dopant concentrations (1wt.%, 2wt%, 3wt.% and 4wt.%) at room temperature 450 C o annealing temperature will be presented. The results of the hall effect showed that all the films were p-type. The Hall mobility decreases while both carrier concentration and conductivity increases with the increasing of annealing temperatures and doping percentage, Thus, indicating the behavior of semiconductor, and also the D.C conductivity from which the activation energy decrease with the doping concentration increase and transport mechanism of the charge carriers can be estimated. NiO:Au, thin films, Pulsed laser deposition. Article info. ‫رائد‬ ‫ناجي‬ ‫ايمان‬ ،‫جمال‬ ‫كامل‬ ‫العراق‬ ،‫بغداد‬ ،‫بغداد‬ ‫جامعة‬ ،‫العلوم‬ ‫كلية‬ ،‫الفيزياء‬ ‫قسم‬ ‫الخالصة‬ ‫بتراكيز‬ ‫الزجاج‬ ‫على‬ ‫المرسبة‬ ‫بالذھب‬ ‫والمشوب‬ ‫النقي‬ ‫النيكل‬ ‫الوكسيد‬ ‫الرقيقة‬ ‫لالغشية‬ ‫الكھربائية‬ ‫الخواص‬ ‫مختلفه‬...