Al Amarah, Iraq
Al Amarah, Iraq

The University of Misan is an Iraqi university located in Amarah, Maysan, Iraq. It was established in 2007. Originally, the university consisted of the College of Basic Education and the College of Education, which were part of University of Basrah. Wikipedia.

SEARCH FILTERS
Time filter
Source Type

Alasadi A.H.H.,University of Technology, Iraq | Al-Saedi A.K.H.,University of Misan
Journal of Medical Systems | Year: 2017

Breast cancer is the most cause of death for women above age 40 around the world. In this paper, we propose a method to detect microcalcifications in digital mammography images using two-dimensional Discrete Wavelets Transform and image enhancement techniques for removing noise as well as to get a better contrast. The initial step is applying a preprocessing techniques to improve the edge of the breast and then segmentation process (Region of interest) for eliminating some regions in the image, which are not useful for the mammography interpretation. Then unsharp masking and histogram modification technique has used to enhance the contrast of the image and to clarify some details like microcalcifications. Lastly, Discrete Wavelets Transform applied for detecting the abnormality. The proposed method has evaluated using the Mammographic Image Analysis Society (AS) mammography databases. The proposed method has achieved acceptable results. © 2017, Springer Science+Business Media New York.


Al-Zahy Y.M.A.,University of Misan
Optical Engineering | Year: 2014

An analytical solution of the generalized nonlinear Schrodinger equation which is implemented with fiber laser applications has been presented. The solution based on the exp-function method which is depending on time, space and small perturbations has been found. This solution was used to test the behavior and study the propagation characteristics of laser pulses and compared with some of the researches in the same field and the nonlinear effects as gain dispersion, second anomalous group velocity dispersion, self phase modulation, and frequency are investigated. The net results are that the parabolic pulse growth after z = 4 m, and generate a periodic pulse train, the power of pulse is increased with increasing the length of fiber laser with reduce its width, the nonlinear effects have a small role on the pulse power, but they effect on the modulation stability of the laser and lead to generate sideband, the behavior of the pulse converted to chaotic when increasing the frequency. © 2014 Society of Photo-Optical Instrumentation Engineers (SPIE).


We investigate the generation of a chirped pulse in a single-mode, ring-cavity, erbium-doped fiber laser employing carbon nanotubes (CNTs) as a saturable absorber (SA). The pulse propagation is simulated using analytical methods to understand and quantify the role of multiple SA properties, particularly in the propagation dynamics of the laser pulse. The soliton solution is obtained on the basis of nonlinear effects, such as gain dispersion, second anomalous group-velocity dispersion, self-phase modulation, and two-photon absorption for a generalized nonlinear Schrodinger equation. The influences of the SA parameter in the range from 0.1 to 0.4 on the chirp, power, and width of the soliton are calculated. A stable, passively mode-locked fiber laser using CNTs as an SA is modeled. In addition, the power, width, chirp, and phase of the soliton pulses can be tuned by choosing suitable SA parameters. © The Authors.


Alsaedi M.A.,University of Misan
Journal of Vibroengineering | Year: 2014

The partial discharge (PD) phenomenon is very harmful for electrical appliances and its early detection could be a cost effective approach for the industry. Although many techniques are used for PD detection yet no technique has presented widely acceptable solution. Still the subject needs parallel study of the detection techniques. In this experimental, multimode fiber (MMF) was placed in oil tank. The PD induced acoustic emission (AE) inside the insulation oil. PD signal has been captured by using step-index multimode of fiber optic sensor (FOS). The results shows FOS has good sensitivity in the range of applied high voltage 10 kV. © JVE INTERNATIONAL LTD. JOURNAL OF VIBROENGINEERING.


Al-Lami A.K.A.,University of Misan
Journal of Polymer Research | Year: 2014

Two new series of supramolecular liquid crystalline block copolymers have been synthesized. The first, is based on a backbone that contains carboxylic acid groups. The second is a side chain block copolymer exhibiting hydrogen bonding between the carboxylic acid and the pyridine moiety of a simple low molar mass molecule. These copolymers contain two different flexible spacer lengths, the first fixed at two methylene groups, while the other spacer varies from two to seven groups. The phase behavior and transitional properties of these series have been analyzed by optical polarized microscopy and differential scanning calorimetry, while the structures and properties of the prepared compounds were determined by spectroscopic techniques, elemental analysis, thermogravimetric analysis, and powdered X-ray diffraction. © 2014, Springer Science+Business Media Dordrecht.


Al-Lami A.K.,University of Misan
Polycyclic Aromatic Compounds | Year: 2015

Two new series of hydrogen bonding liquid crystal dimers were prepared and their self-assemble behavior and structure–property relationships were studied through intermolecular hydrogen bond formation. The first series of symmetric liquid crystal dimers have two terminal alkoxy chains and the second have four terminal alkoxy chains. Their structures were elucidated using spectroscopic techniques, elemental analysis, and powdered X-ray diffraction. The mesophases and their corresponding transition temperatures were identified by differential scanning calorimetric measurements and polarized optical microscope. 2015 Copyright © Taylor & Francis Group, LLC


Al-Shaheen A.,University of Misan
Journal of Engineering and Applied Sciences | Year: 2011

In this paper we enhance the beam width for Global Positioning System (GPS) application rectangular patch microstrip antenna for two designs at L1 centered at 1.75742 GHz and L5 centered at 1.17642 GHz. Two antennas are mounted on the hexa-pyramidal ground plane to utilize for broadening the beam width for wide coverage area with circularly polarized radiation pattern, the antenna substrate is FR4 of ε r = 4.4 with thickness of 3.2 mm. The parametric study has been done to choose the optimum parameters for the top ground plane, base of ground plane, and drooped angle, the yielding results of this study shows that the beam width is up to 160° and 170° for E-plane and H-plane, respectively with a gain of -1.2 dB for RHCP radiation pattern at resonance frequency of 1.575 GHz antenna at top ground plane 40 mm and base ground plane 125 mm and 50° for drooped angle. While, for the beam width is up to 150° and 160° for E-plane and H-plane respectively, with a gain of -1.67 dB for RHCP radiation pattern at resonance frequency of 1.176 GHz antenna at top ground plane 60 mm and base ground plane 150 mm and 60° for drooped angle. The results are compared with the traditional rectangular patch microstrip antenna for the GPS application. The band width is 43 MHz and 54.7 MHz for to 1.57542 GHz and 1.17642, respectively. © 2006-2011 Asian Research Publishing Network (ARPN).


Al-Zahy Y.M.A.,University of Misan
Journal of Nanophotonics | Year: 2015

We derive an equation for the differential cross-section dγ/ω of reflected electrons by using Electron Mirror method. The mathematical derivation of differential cross-section equation is based on the Rutherford scattering model as well as the equation of electric potential difference. We describe the interaction of focused electron beams with a polyethylene terephthalate sample using focused ion beam-scanning electron microscope electron mirror image. The electron differential cross-section dγ/ω for different working distances h . 33, 20, and 10 mm, with a scattering angle θ ranged from 10 deg to 55 deg, incident electrons energies n=500, 750, and 1000 eV, and scanning potential δφ ranged from 1 to 2 kV has been calculated. According to our findings, the differential cross-section dγ/ω of reflected electrons decreases with increasing scattering angle θ and the working distance h and is directly proportional to the difference potential δθ and the energy of incident electrons n. Distort the electron mirror images with increased δφ. © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE).


Al-Shaheen A.,University of Misan
Journal of Engineering and Applied Sciences | Year: 2011

In this paper we present a planar left-handed material pattern on the rectangular patch antenna mounted on the substrate is designed to enhance its horizontal radiation as well as to broaden its working bandwidth. The parametric study is done to study the effect of the ground plane slots width of 0.3, 0.4 and 0.5 mm respectively on the return loss and bandwidth enhancement, the best value of g is 0.4 mm. Enhancement in the bandwidth is achieved by introducing the metamaterial phenomena instead of the single patch antenna is about 19.2 times with g = 0.4 mm. © 2006-2011 Asian Research Publishing Network (ARPN).


Al-Shaheen A.,University of Misan
ARPN Journal of Engineering and Applied Sciences | Year: 2012

In this paper we present a new patch antenna as a hexagonal patch operating in the Industrial Scientific Medical (ISM) frequency band at 2.45 GHz, the proposed antenna is verifying using to different numerical techniques which are Finite Element Method FEM and Method of Moment MoM, the compression results give us good agreement. When human body is presented near the antenna the antenna performance such as S 11 and bandwidth are affected, the result demonstrates that the new antenna has negligible effect compared with that of the rectangular patch antenna. © 2006-2012 Asian Research Publishing Network (ARPN).

Loading University of Misan collaborators
Loading University of Misan collaborators