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: 2014 volume:10 issue:2

Article
Iraqi Journal of Applied Physics

Authors: Editorial Board
Pages: 1-2
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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.

Keywords

Applied Physics


Article
Probabilistic Roadmap, A*, and GA for Proposed Decoupled Multi-Robot Path Planning

Authors: Safaa H. Shwail --- Alia Karim
Pages: 3-9
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Abstract

In this paper, two main steps algorithm used to determine the optimal path planning for the multi-robot problem. Firstly, a probabilistic roadmap is developed in the free configuration space of the robots work space which avoids the static obstacles. Then by using the A* algorithm and the probabilistic roadmap created, the near-optimal path for each robot is determined which represents the shortest path between the starting point and the end point. Secondly, we used an improved genetic algorithm to make these paths more optimal to guarantee the shortest paths, which represents an intermediate process lie between roadmap creation and path following. Also, we used a new population production method in this algorithm, and new operators in addition to the selection and crossover in the genetic algorithm also used to ensure the feasibility of the results. The results of the simulation gained from the proposed method show that it is optimal by finding the shortest path for each robot with optimization rate average 18.25% from the original path, and it is fast enough to find the optimal paths in few generations.


Article
ICAP 2015: XII International Conference on Applied Physics

Pages: 10-10
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Abstract

The ICAP 2015: XII International Conference on Applied Physics aims to bring together leading academic scientists, researchers and research scholars to exchange and share their experiences and research results about all aspects of Applied Physics. It also provides the premier interdisciplinary and multidisciplinary forum for researchers, practitioners and educators to present and discuss the most recent innovations, trends, and concerns, practical challenges encountered and the solutions adopted in the field of Applied Physics.

Keywords


Article
Design and Implementation of Adaptive Antenna System in a New LTE 3GPP Transceivers Based Multiwavelet Signals

Authors: Mohammed A. Kadhim
Pages: 11-16
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Abstract

The new Long Term Evolution (LTE) transceivers based multiwavelet signals design and implementation are discussed in this paper. LTE is the evolution of the Universal Mobile Telecommunications System (UMTS) is a third generation mobile cellular system for networks based on the Global System for Mobile Communications (GSM) standard in response to ever‐increasing demands for high quality multimedia services according to users’ expectations; to increase the efficiency of such transceiver successive Adaptive Antenna System (AAS) has been used at receiver to provide an effective reduction of multiuser access interference at an affordable complexity. An AAS has been deployed at the receiver module to reduce the fading effects signal caused by proposed Stanford University Interim (SUI) Channel Models. 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 demonstrated through MATLAB simulations that the performance of the system is significantly improved by AAS, where beam forming is implemented in the direction of desired user. The results give SNR gain of 1.8dB gained to achieve an error of 10-3 in SUI channels. The performance of the system can be more improved by increasing the number of antennas at receiver.


Article
Optimization of Silicon Solar Cells Efficiency by Chemical Texturing

Authors: Walid K. Hamoudi --- Dayah N. Raouf --- Muna S. Murad
Pages: 17-22
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Abstract

The effect of texturing on the characteristics of laboratory made single crystal silicon solar cell is presented. I-V and C-V characteristics, spectral responsivity and conversion efficiency were measured after etching the samples with KOH for 25 minutes. 29% efficiency increase of the textured cell was obtained and the spectral responsivity measurements demonstrated a blue-shift in the peak response. The large increase in photocurrent indicated the influence of trapping effect in which effective absorption coefficient is significantly increased at higher levels of illumination.


Article
Preparation and Characterization of PAni Films by Electrochemical Polymerization

Authors: Raid A.W. Ismail
Pages: 23-26
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Abstract

In this paper, a thin film of H2SO4 doped polyaniline (PAni) has been electrochemically polymerized on conducting indium tin oxide (ITO) substrate. Electrochemical synthesis was carried out by potentiostatic method at 0.7V. The structural and chemical characteristics of the prepared film were investigated by using x-ray photoelectron spectroscopy (XPS), scanning electron microscopy SEM, energy dispersive spectroscopy EDS, and Fourier transformation infrared spectroscopy FT-IR. The direct optical band gap of PAni was estimated from the optical properties and found to be 2.6 eV. The optical properties confirmed that the synthesized film has two broad absorption bands. The surface conductivity measurement was conducted with a four point probe.


Article
Effect of Acidic Environment on the Spectral Properties of Hibiscus sabdariffa Organic Dye used in Dye-Sensitized Solar Cells

Authors: Oday A. Hammadi --- Noor I. Naji
Pages: 27-31
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Abstract

In this work, the spectral properties of the Hibiscus sabdariffa organic dye solved in different solvents were studied by introducing the effect of dye concentration on its absorbance and transmission spectra within the range 400-800nm. As well, the effect of adding acid to the dye solution on these properties was introduced. Results showed that the spectral properties of the dye depend substantially on the type of the solvent, which has to be chosen carefully to achieve the optimum properties of this dye to be used as a sunlight sensing organic medium in dye-sensitized solar cells. Also, the results showed that the spectral properties of this dye are noticeably affected by the presence of acid in the solution. Variation of acidic content in the dye solution was studied and its effect on both absorbance and transmittance was studied. As the acidic content in the solution was increased, the absorbance increased while transmittance decreased that may be attributed to dissociation of dye molecules, formation of new different compounds and/or quenching the spectral activity of the Hibiscus sabdariffa dye molecules.


Article
ICOAP 2015: XII International Conference on Optoelectronics and Applied Physics

Authors: Editorial Board
Pages: 32-33
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Abstract

The ICOAP 2015 : XII International Conference on Optoelectronics and Applied Physics is the premier interdisciplinary forum for the presentation of new advances and research results in the fields of Optoelectronics and Applied Physics. The conference will bring together leading academic scientists, researchers and scholars in the domain of interest from around the world.

Keywords

Applied Physics


Article
Rutherford, Ernest, 1st Baron Rutherford of Nelson and Cambridge

Authors: Editorial Board
Pages: 34-37
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Abstract

Rutherford, Ernest, 1st Baron Rutherford of Nelson and Cambridge (1871-1937), British physicist, who became a Nobel laureate for his pioneering work in nuclear physics and for his theory of the structure of the atom.

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Article
Technology's Future: A Look at the Dark Side

Authors: BARNABY J. FEDER
Pages: 38-38
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Abstract

AS far as anyone knows, the plight of civilization is nowhere near as dire as in the opening pages of Douglas Adams's "The Hitchhiker's Guide to the Galaxy," where alien spaceships are poised to destroy Earth to make way for an interstellar highway. Still, with resource consumption and environmental destruction rising at unsustainable rates, plenty of people view the future with alarm. That spotlights technologies like nuclear power, genetic engineering and nanotechnology, which are often cited as crucial to heading off economic and environmental disaster.


Article
IJAP Copyright Form 2014

Authors: Editorial Board
Pages: 39-39
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Abstract

The authors will keep the following rights: 1. Possession of the article such as patent rights. 2. Free of charge use of the article or part of it in any future work by the authors such as books and lecture notes after informing IJAP editorial board. 3. Republishing the article for any personal purposes of the authors after taking journal permission.

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