Islamic Azad University at Sarab

www.iausa.ac.ir/
Sarab, Iran

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Ghehsareh H.R.,Islamic Azad University | Abbasbandy S.,Imam Khomeini International University | Soltanalizadeh B.,Islamic Azad University at Sarab
Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences | Year: 2012

In this research, the Laplace-Adomian decomposition method (LADM) is applied for the analytical and numerical treatment of the nonlinear differential equation that describes a magnetohydrodynamic (MHD) flow under slip condition over a permeable stretching surface. The technique is well applied to approximate the similarity solutions of the problem for some typical values of model parameters. The obtained series solutions by the LADM are combined with the Padé approximation to improve the accuracy and enlarge the convergence domain of the obtained results. Through tables and figures, the efficiency of the presented method is illustrated. © 2012 Verlag der Zeitschrift für Naturforschung, Tübingen.


Soltanalizadeh B.,Islamic Azad University at Sarab | Yildirim A.,Ege University | Yildirim A.,University of South Florida
Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences | Year: 2012

In this article, the differential transformation method (DTM) is utilized for finding the solution of the regularized long wave (RLW) equation. Not only the exact solutions have been achieved by the known forms of the series solutions, but also for the finite terms of series, and the corresponding numerical approximations have been computed. © 2012 Verlag der Zeitschrift für Naturforschung, Tübingen.


Babayar-Razlighi B.,Islamic Azad University at Sarab | Soltanalizadeh B.,Islamic Azad University at Ardabil
Mathematical and Computer Modelling | Year: 2013

In this paper, we consider a nonlinear system of Volterra integral equations, and apply Newton's method to linearize it. We solve each step of Newton's system by the product integration technique. Also, we provide the sufficient conditions for convergence of the numerical method. Finally, we give a test problem to illustrate the applicability and accuracy of the presented method. © 2013.


Ghehsareh H.R.,Imam Khomeini International University | Soltanalizadeh B.,Payamenoor University | Soltanalizadeh B.,Islamic Azad University at Sarab | Abbasbandy S.,Imam Khomeini International University
International Journal of Computer Mathematics | Year: 2011

Recently, various sequential numerical schemes have been proposed for the solution of non-classical hyperbolic initial value problems which involve non-local integral terms over the spatial domain. In this paper, we focus on the wave equation with the non-local boundary condition. Two matrix formulation techniques based on the shifted standard and shifted Chebyshev bases are proposed for the numerical solution. Several numerical examples and also some comparisons with another methods will be investigated to confirm the efficiency of this procedure. © 2011 Taylor & Francis.


Naderi S.B.,Islamic Azad University at Sarab | Jafari M.,Islamic Azad University at Sarab | Tarafdar Hagh M.,University of Tabriz
IEEE Transactions on Industrial Electronics | Year: 2013

This paper proposes a new parallel-LC-resonance-type fault current limiter (FCL) that uses a resistor in series with a capacitor. The proposed FCL is capable of limiting the fault current magnitude near to the prefault magnitude of distribution feeder current by placing the mentioned resistor in the structure of the FCL. In this way, the voltage of the point of common coupling does not experience considerable sag during the fault. In addition, the proposed FCL does not use a superconducting inductor which has high construction cost. Analytical analysis for this structure is presented in detail, and simulation results using power system computer-aided design/electromagnetic transients, including dc software are obtained to validate the effectiveness of this structure. Also, an experimental setup is provided to show the accuracy of the analytic analyses and simulation results. © 1982-2012 IEEE.


Akbarmehr J.,Islamic Azad University at Sarab
African Journal of Microbiology Research | Year: 2010

Salmonella serovars are one of the primary food-borne pathogens that cause infections in both animals and humans. The hyperinvasive locus A (hilA) gene has an important role in Salmonella pathogenicity. This gene encodes an ompR/ToxR transcriptional regulator that activates the expression of invasion gene and facilitates the entry of the bacteria into intestinal epithelial cells. Our goal of this research was to isolate Salmonella from poultry and detect their hilA gene by Polymerase Chain Reaction (PCR) technique. For this purpose 520 samples were obtained from ostrich, pigeon and chicken in poultry farms of East Azarbayjan province which is located in northwest of Iran. Samples were tested by bacteriological and serological tests. PCR was applied with one pair of primers targeting the Salmonella hilA gene. According to the results of bacteriological tests 45 Salmonella strains were found among 520 of total samples. The prevalence of Salmonella in ostrich, pigeon and chicken were determined as 6.66, 15.55, and 7.25%, respectively. Salmonella isolates represented four different serogroups (D1.B.C1, and C2) which Salmonella serogroup D1 was the most dominant serogroup. The PCR of the hilA gene produced a band of 854 bp with all the Salmonella isolates. This research indicated the relatively high prevalence of Salmonella spp in pigeon compare with ostrich and chicken and suggested that the hilA gene could be present in different Salmonella strains from different hosts in poultry. ©2010 Academic Journals.


Soltanalizadeh B.,Islamic Azad University at Sarab
Optics Communications | Year: 2011

In this research a numerical technique is developed for the one-dimensional heat equation that combines classical and integral boundary conditions. New matrix formulation techniques with arbitrary polynomial bases are proposed for the numerical/analytical solution of this kind of partial differential equation. We give a simple and efficient algorithm based on an iterative process for numerical solution of the method. © 2010 Elsevier B.V. All rights reserved.


Aali S.,Islamic Azad University at Sarab
Journal of Electrical Engineering | Year: 2014

The unified power quality conditioner (UPQC) can be utilized to alleviate the fluctuations and improve the stability of the wind turbine. The fuzzy controller is able to handle non-linear and time varying systems. This paper presents application of the fuzzy controller in control system of the UPQC for stability enhancement of wind farm. A frequency-domain method based on a linearized system model using root locus, eigenvalue technique and a time-domain analysis based on nonlinear system model are both employed to verify the effectiveness of the proposed controller. It is validates the UPQC with proposed controller can enhance the stability margin in tested power system significantly and it has fast response. The proposed controller is robust and powerful for recovery of the bus voltage rather than UPQC with classic controller.


Akbarmehr J.,Islamic Azad University at Sarab | Ghiyamirad M.,Islamic Azad University at Sarab
African Journal of Microbiology Research | Year: 2011

Brucellosis is an infectious and zoonotic disease of worldwide distribution. Despite its control program, the disease is endemic in Iran and remains one of the most important public health problems. The aim of this survey was to determine the seroprovalence of brucellosis in livestock animals in Sarab City, Iran. A total of 1500 animals (600 cattle, 740 sheep and 160 goats) were examined for brucellosis from February 2007 to September 2008. The examined animals were divided into two sex groups (male and female). Moreover cattle were divided into four breed groups (Holstein, Brown Swiss, Native and Mixed). Serological examinations including Rose Bengal plate test (RBPT), serum agglutination test (SAT) and 2-mercaptoethanol test (2ME) were performed on serum samples obtained from examined animals. In overall, out of 1500 blood samples 61 (4.06%) were positive for brucellosis. The prevalence of brucellosis in cattle, sheep and goats were found 3.66, 4.18 and 5%, respectively. The prevalence rates of brucellosis in different breeds of cattle, Holstein, Brown Swiss, native and mixed breeds were determined as: 4.72, 2.22, 2.50 and 3.75%, respectively. The prevalence rates of the disease in male and female animals were determined as follows: Male cattle, 1.53%, female cattle, 3.92%, male sheep, 2.8%, female sheep, 4.89%, male goats, 2.22%, and female goats, 6.08%. There were differences in the prevalences of brucellosis in different breeds and sexes of examined animals however statistically were not significant (P>0.05, X 2<3.84). The results of the present study indicated that the prevalence of brucellosis in livestock animals in Sarab City is relatively high and effective control program of the disease should be recommended. © 2011 Academic Journals.


Akbarmehr J.,Islamic Azad University at Sarab
African Journal of Microbiology Research | Year: 2011

Ringworm is a fungal and zoonotic infectious disease, caused by different species of dermatophytes. Lesions of ringworm are usually found on the head, muzzle, ears, neck, and particularly, around the eyes of the infected animals. This study was conducted to determine the prevalence of cattle ringworm in native farms of Sarab city in Iran. A total number of 1150 cattle in native dairy farms of Sarab city were examined in this study from July 2007 till June 2008. The animals were classified into two age groups of less than 2 years and more than 2 years. Each animal was thoroughly examined for skin ringworm lesions, then, microscopic and culture examinations were carried out on samples obtained from ringworm lesions of infected animals. According to the results of this study among 1150 cattle, 188 of them (16.34%) were clinically positive for skin ringworm lesions. After microscopic and culture examinations, 150 animals (13.04%) were confirmed for dermatophyte infections. Trichophyton verrucosum was isolated in 100% of positive samples. The prevalence of ringworm among cattle less than 2 years and more than 2 years were 15 and 9% respectively, which showed significant difference between them. This study is the first research on the prevalence of cattle ringworm in Sarab city which indicated the relatively high prevalence of the disease and revealed the dominant role of T. verrucosom in cattle ringworm. © 2011 Academic Journals.

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