Table of content

Iraqi Journal of Applied Physics

المجلة العراقية للفيزياء التطبيقية

ISSN: 18132065 23091673
Publisher: iraqi society for alternative and renewable energy sources and techniques
Faculty:
Language: English

This journal is Open Access

About

The Iraqi Journal of Applied Physics (IJAP) is a peer reviewed journal of high quality devoted to the publication of original research papers from applied physics and their broad range of applications. IJAP publishes quality original research papers, comprehensive review articles, survey articles, book reviews, dissertation abstracts in physics and its applications in the broadest sense. It is intended that the journal may act as an interdisciplinary forum for Physics and its applications. Innovative applications and material that brings together diverse areas of Physics are particularly welcome. Review articles in selected areas are published from time to time. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts, policy makers and executives in industry, commerce and investment institutions. IJAP is a quarterly specialized periodical dedicated to publishing original papers, letters and reviews in: Applied & Nonlinear Optics, Applied Mechanics & Thermodynamics, Digital & Optical Communications, Electronic Materials & Devices, Laser Physics & Applications, Plasma Physics & Applications, Quantum Physics & Spectroscopy, Semiconductors & Optoelectronics, Solid State Physics & Applications, Alternative and Renewable Energy, Computers Networks and Applications.

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Contact info

P. O. Box 55259,
Baghdad 12001,
Iraq
Website: www.iraqiphysicsjournal.com
Email: admin@iraqiphysicsjournal.com
Email: editor_ijap@yahoo.co.uk

Table of content: 2015 volume:11 issue:1

Article
Iraqi Journal of Applied Physics
المجلة العراقية للفيزياء التطبيقية

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Abstract

The Iraqi Journal of Applied Physics (IJAP) is a peer reviewed journal of high quality devoted to the publication of original research papers from applied physics and their broad range of applications. IJAP publishes quality original research papers, comprehensive review articles, survey articles, book reviews, dissertation abstracts in physics and its applications in the broadest sense. It is intended that the journal may act as an interdisciplinary forum for Physics and its applications. Innovative applications and material that brings together diverse areas of Physics are particularly welcome. Review articles in selected areas are published from time to time. It aims to disseminate knowledge; provide a learned reference in the field; and establish channels of communication between academic and research experts, policy makers and executives in industry, commerce and investment institutions. IJAP is a quarterly specialized periodical dedicated to publishing original papers, letters and reviews in: Applied & Nonlinear Optics, Applied Mechanics & Thermodynamics, Digital & Optical Communications, Electronic Materials & Devices, Laser Physics & Applications, Plasma Physics & Applications, Quantum Physics & Spectroscopy, Semiconductors & Optoelectronics, Solid State Physics & Applications, and Computers and Networks.


Article
Design and Implementation of Adaptive Antenna System in Physical Layer CDMA Transceivers Based Multiwavelet Signals

Authors: Mohammed A. Kadhim
Pages: 3-8
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Abstract

In this paper, we optimization of the Code division multiple access (CDMA) transceiver by using Adaptive Antenna System (AAS) at the receiver it has been shown that receivers based on successive AAS provide an effective reduction of multiuser access interference at an affordable complexity. The aim of this work is to minimize the bit error rate. An AAS has been deployed at the receiver module to reduce the fading effects signal caused by proposed SUI channels model. AAS uses beamforming technique to focus the wireless beam between the base station and the subscriber station. The Least Mean Square (LMS) algorithm is used at the receiver to direct the main beam towards the desired LOS signal and nulls to the multipath signals. It has been proved through this idea by MATLAB simulations that the performance of the system significantly improves by AAS, where beamforming is implemented in the direction of desired user. The performance of the system can more improve by increasing the number of antennas at receiver.

Keywords

OFDM --- DMWT --- CDMA --- LMS --- Beamforming


Article
Structural, Electronic and Thermal Properties of TiC Compound in Sodium Chloride Structure

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Abstract

The aim of this work is to investigate some different properties of TiC in the sodium chloride structure. First-principles calculations were performed to study the structural, electronic and thermodynamic properties using the full potential-linearized augmented plane wave plus local orbitals method within the density functional theory.We use both the Wu–Cohen and Engel–Vosko generalized gradient approximations of the exchange-correlation energy that is based on the optimization of total energy and corresponding potential, respectively. Besides, a regular-solution model is used to investigate the thermodynamic stability. In addition, the quasi-harmonic Debye model is used to determine the thermal properties up to 1500 K.


Article
Growth of Nanostructured CdO:In Films by Pulsed Laser Deposition

Authors: Ali A. Yousif --- Mazin H. Hasan
Pages: 15-19
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Abstract

In this work, indium-doped cadmium oxide (CdO:In) films were prepared by Pulsed Laser Deposition (PLD) on sapphire α- Al2O3 (006) substrate with thickness of about 100nm for all CdO:In films at different deposition conditions and the number of laser pulses was 100 pulses, by Nd-YAG Q-Switching second harmonic generation (SHG) pulsed laser with a wavelength of 532nm, repetition rate 10Hz and pulsed width 10ns. The effect of doping on the structure and morphology properties of the CdO:In films have been investigated by X-Ray diffraction (XRD), and Atomic Force Microscopy (AFM). The result showed that nano-crystalline and (111)-oriented CdO films were obtained at substrate temperature of 400°C, laser fluence 400mJ. The smallest grain size was obtained at 7wt.% In are 16.52nm, this indicates the superior nanocrystallinity of the films which also has observed from the SEM and AFM images. The surface morphology of the films reveals that presence of indium content in the structure did affect the surface morphology of the films significantly.


Article
Colloidal Nanoparticles for Heterogeneous Catalysis

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Abstract

Pulsed laser ablation of metals prepares ligand-free nanoparticles for colloidal deposition on a variety of surfaces.


Article
Effect of Bio-Fiber Waste Addition on Specifications of Epoxy Composite

Authors: Bushra H. Musa
Pages: 21-24
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Abstract

This study investigated the fabrication of composite from epoxy resin (EP) and waste short chicken feather fiber (CFF) at 5% volume fraction of fibers using hand lay-up method at room temperature. Some mechanical properties of the composite were determined including bending, shore D hardness and compressive strength. The process involved the treatment of the CFF with alkali solution, such as NaOH with 0.5 normality and then the effect of treatment on epoxy composite properties was studied. The results revealed that the addition of CFF to the epoxy resin has only a slight effect on the mechanical properties. It has shown that the values of Young modulus, compressive strength and hardness of EP/CFF composite were increased by the treatment of CFF with NaOH solution compared to pure epoxy and EP/CFF composite without treatment.


Article
Preparation and Characterization of Eggshell Powder (ESP) and Study its Effect on Unsaturated Polyester Composites Material

Authors: Rafah A. Nasif
Pages: 25-28
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Abstract

Microcomposites of unsaturated polyester (UP) with different loading of eggshell powder of grain size (36µ) ranging from 0 to 25wt% were prepared by hand – layup method. The mechanical properties of the composites such as: tensile strength, young's modulus and impact strength were studied as a function of filler loading. All of these mechanical properties values were decreased with increasing the filler concentration. To improve adhesion between the filler and matrix some coupling agents have been used like: NaOH, silane and stearic acid. The results showed that tensile strength and young modulus for stearic acid treated filler increase with increasing of filler loading followed by a decrease beyond 15wt%. Silane treated filler showed similar results o fimpact strength compared to untreated system. Impact strength of all coupling agent systems were increased with increasing the filler concentration, while decrease for untreated system. Finally, stearic acid treated filler have higher values of impact strength as compared to the other composites.


Article
Characterization of Laser-Ablated Nanostructured Al2O3/p-Si Solar Cells

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Abstract

This work was devoted for production of alumina (Al2O3) nanoparticles via pulsed-laser ablation technique from a solid alumina target immersed in distilled water with laser wavelength of 1064 nm. The produced NPs were characterized by UV-visible spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM) and Fourier-transform infrared (FTIR) measurements. FTIR spectra exhibit that bulk Al2O3 vibrational modes appear at <1000 cm-1, which indicates the formation of aluminum oxide nanoparticles. The SEM images showed that most of the obtained nanoparticles have spherical shape with a particle size of less than 1 micron. The absorption spectra of Al2O3 nanoparticles suspended in deionized water were recorded at room temperature using UV-visible spectroscopy. The absorption spectra show a strong peak at 240 nm arising from the presence of Al2O3 nanoparticles in combination with energy gap 4 eV. The n-Al2O3/p-Si solar cells were fabricated by depositing the aluminum oxide nanoparticles on p-type silicon wafers and glass substrates and then dried in an oven at 40°C for one hour to prepare and characterize heterojunction solar cells.


Article
IJAP Copyright Transfer Form
استمارة نقل حقوق النشر والتوزيع

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Abstract


Article
IRAQI JOURNAL OF APPLIED PHYSICS
صفحة محتويات العدد

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Abstract

Keywords

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