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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: 2011 volume:7 issue:1

Article
Performance Optimizing of Fourth Order Delta- Sigma Fractional-N Frequency Synthesizer using a Dither Technique for Third Generation (3G)

Authors: M.N. Raheema --- H.A. Nassir --- A.K. Naher
Pages: 3-9
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Abstract

This paper proposes a frequency synthesizer for WCDMA applications. Different techniques for phase noise reduction are discussed. Sigma-delta fractional-N technique is chosen for WCDMA system, since low settling time, spurious level and phase noise can be obtained by using this technique. Also it is proposed to add dither before the quantizer of modulator in order to eliminate any distortions introduced by the quantization stage. Design parameters for the proposed order (1-1-1-1) MASH fractional-N synthesizer for 3G are selected from the results of analysis for each unit of the proposed system and according to WCDMA standards. Simulation results prove that the proposed dithered frequency synthesizer for the WCDMA application is very efficient in reducing noise. The in-band phase noise obtained with this synthesizer is -96dBc/Hz. MATLAB (R2010a) are used for simulation of MASH (1-1-1-1) fractional-N frequency synthesizer.


Article
Effect of Thickness on Optical and Electrical Properties of ZnO Prepared by CBD

Authors: S.M.H. Aljawad --- A.F.S. Alshareefi --- A.K. Judran
Pages: 11-16
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Abstract

ZnO Thin films were deposited by chemical bath deposition. Structure, optical, and electrical properties of these films were analyzed in order to investigate their dependence on thickness of films. High quality ZnO films with a low resistivity of 1.3 cm and transparency above 80% were able to be formed for thickness 95.8nm. X-ray diffraction and spectrophotometer are used to investigate the properties of ZnO films.


Article
Effects of Temperature on the Properties of Amorphous-to-Crystalline Transition in AgSbSe2 Thin Films

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Abstract

Nearly stoichometric thin films of the ternary AgSbSe2 compound have been deposited at room temperature by conventional thermal evaporation of the presynthesized material onto glass substrate. The X-ray and electron diffraction studies revealed that the as-deposited films are amorphous in nature, while an amorphous-to-crystalline phase transition could be obtained by thermal sannealing at 373K.


Article
Calculation of the Buildup Factors for Ceramic Materials

Authors: S.I. Jubair
Pages: 23-26
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Abstract

Iraqi Siliceous rocks were chosen to be used as raw materials in this study which concern with bending strength and their related parameters. They are porcelinite from Safra area (western desert) and Kaolin Duakla, their powders were mixed in certain percentage, to shape compacts and sintered. The study followed with thermal and chemical treatments, which are calcination and acid washing. The effects on final compact properties such as bending strength were studied. Bending strength was calculated for sintered compacts to study the effects of calcination processes, chemical washing, weight percentage, sintering processes, loading moment were studied on this property. Where the compacts for groups are insulating materials and have good thermal conductivity by previous studies. The results indicate that some of these groups satisfy ability the required bending strength property for electrical insulator, thermal conductivity property is required to complete final stage to be used in industry.


Article
Luminescence Characterization of the Bio-Conjugated Quantum Dots with CA125 Antigen Using Linkage Molecules

Authors: L. Zhukov
Pages: 27-30
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Abstract

Ovarian cancer is the most lethal gynecologic malignancy. This largely reflects the fact that approximately 75% of cases are detected at an advanced stages of disease, when cure is unlikely. It is accepted that detecting a greater number of patients with early stage disease by improving screening modalities could significantly improve overall survival

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