Imam Hossein University
Tehran, Iran

The Imam Hossein Comprehensive University is a public university located in Tehran, Iran.The university was opened in 1986, and is located in Babayi Expressway near Tehranpars and Hakimiyeh in northeastern Tehran. The university is affiliated with IRGC, Ministry of Science, Research and Technology , and Ministry of Defense and Armed Forces Logistics . It is sometimes referred to as "IHU". The university's official title is the Imam Hossein Comprehensive University . It is named after Imam Hossein, a grandson of the Islamic prophet, who was martyred in 680.IHU provides undergraduate and postgraduate programs in 15 departments. The student body consists of 6000 students and cadets. The procedure for accepting and processing requests at IHU is different from other universities. Regular students can get admission by passing Iranian University Entrance Exam which is done yearly by Ministry of Science, Research and Technology . Those students are without scholarship and will not be employed by IRGC. They should also pay tuition fees. However, students with scholarship are accepted by IRGC after passing ideological interviews and medical tests, and being a member of Basij will be an advantage for getting scholarship. Those students are not permitted to go abroad or work for private companies. For many years, IRGC Cadet College and IHU academic division were in the same place. But, the Imam Hossein Cadet College was separated from the academic division in 2005. Then, the academic division was relocated to another recently built infrastructure, and was renamed to the "Imam Hossein Comprehensive University". Wikipedia.

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Nanofluids are advanced liquids with a relatively high production cost. Experiments that are performed to detect nanofluid characteristics in various thermal systems could be replaced by modeling tools to reduce the expenses. The present paper deals with the post-processing of experimental data on the flow and heat transfer in a nanofluid-based double tube heat exchanger using an artificial neural network. Relative values of Nusselt number and pressure drop in the heat exchanger are modeled where Ag/water nanofluids with volume fractions up to 1% have been exploited as the working fluid. The results of present work unveil the ability of neural network to predict the data with excessive noise. The data regression coefficients for the relative Nusselt number and relative pressure drop are 99.76% and 99.54%, respectively, which show the high accuracy of the applied method. © 2017 Elsevier Ltd

Aghaei A.,Iran University of Science and Technology | Milani Hosseini M.R.,Iran University of Science and Technology | Najafi M.,Imam Hossein University
Electrochimica Acta | Year: 2010

A novel cholesterol biosensor based on capacitive detection has been developed using molecularly imprinted polymers. The sensitive layer was prepared by electropolymerization of 2-mercaptobenzimidazole (2-MBI) on a gold electrode in the presence of cholesterol as a template. Cyclic voltammetry and capacitive measurements were used to monitor the process of electropolymerization. Surface uncovered areas were plugged with 1-dodecanethiol to make the layer dense, and the insulating properties of the layer were studied in the presence of K 3Fe(CN) 6/K 4Fe(CN) 6 redox couples and also by the use of AC impedance measurements. The template molecules and the non-bound thiol were removed from the modified electrode surface by washing with an alkaline solution of ethanol. The sensor's linear response range was between 5 and 30 μM, with a detection limit of 0.42 μM. The proposed molecularly imprinted polymer capacitive (MIPC) sensor exhibited good selectivity for cholesterol. The reproducibility and repeatability of the MIPC senor were all found to be satisfactory. The results from sample analysis confirmed the applicability of the MIPC sensor to quantitative analysis. © 2009.

Maddah B.,Imam Hossein University | Shamsi J.,Imam Hossein University
Journal of Chromatography A | Year: 2012

In this study, a method for extraction and preconcentration trace amounts of organophosphorus pesticides (OPPs) in environmental water was developed using magnetic solid phase extraction (magnetic-SPE) followed by high performance liquid chromatography (HPLC) with UV detection. Magnetite octadecylsilane nanoparticles were synthesized and characterized by X-ray diffraction, FTIR spectroscopy, vibrating sample magnetometry and scanning electron microscopy. These nanoparticles were applied for extraction and preconcentration of OPPs (residues of diazinon and fenitrothion, which are the most-widely used for pest control in Iran) in environmental water samples at low ngmL-1 concentration as magnetic-SPE adsorbent. The extraction conditions and efficiency of the nanoparticles for OPPs were investigated. The method was evaluated according to the reproducibility, enrichment factor, linearity range and limits of detection. Under optimized conditions, method showed good linearity between 0.03-0.06 and 30ngmL-1 with regression coefficients (R2) of 0.997 and 0.998. Limits of detection were 0.019 and 0.014ngmL-1. The enrichment factors of this method were 172 and 184 and the analysis yielded good reproducibility with the RSD values 7.2% and 5.4% at the 10ngmL-1 level (n=5) for diazinon and fenitrothion, respectively. Determination of OPPs can be easily carried out with this fast, accurate, sensitive and simple method procedure. © 2012 Elsevier B.V.

Khodakarami N.,Imam Hossein University
Archives of gynecology and obstetrics | Year: 2011

To compare the sensitivity, specificity, positive and negative predictive values (PPV and NPV), and accuracy of Pap smear, visual inspection with acetic acid (VIA) and digital cervicography (DC). This is a cross-sectional study on 100 women in the age group of 20-60 years, sequentially using the Pap test, the VIA, and the DC for screening. All women underwent colposcopic biopsy as the gold standard in comparing the methods. Of the total of 100 women with the mean age 36.0 years, 17 cases were recognized positive for abnormal cervical cell by gold standard. The sensitivity, specificity, PPV, NPV, and accuracy of the Pap test, the VIA, and the DC were 23.5, 100, 100, 86.5, and 87%; 62.5, 98.8, 90.9, 93.2, and 92.9%; and 46.7, 97.6, 77.8, 91, and 89.8%, respectively, for cervical neoplasia. The Pap test had low sensitivity but high specificity, whereas VIA had a high sensitivity in addition to being easy and low-cost. Adjuvant methods of screening such as VIA can be a valuable alternative to the Pap test for cervical cancer screening in low-resource settings.

Razavi R.,Imam Hossein University
Physical Review C - Nuclear Physics | Year: 2013

The nuclear level densities, spin cut off parameters, and entropies have been extracted in 116-119Sn and 162,163Dy nuclei using superconducting theory, which includes nuclear pairing interaction. The results agree well with the recent data obtained from experimental level densities by the Oslo group for these nuclei. Also, the entropy excess ratio proposed by Razavi for a proton and neutron as a function of nuclear temperature have been evaluated and are compared with the spin cut off excess ratio. The role of the neutron (proton) system is well determined by the entropy excess ratio as well as the spin cut off excess ratio. The moment of inertia for even-odd and even-even nuclei are also compared. The moment of inertia carried by a single hole is smaller than the single particle moment of inertia. © 2013 American Physical Society.

Najafi M.,Imam Hossein University | Darabi S.,Imam Hossein University
Electrochimica Acta | Year: 2014

A graphene modified glassy carbon electrode (GMGCE) was developed to investigate the electroreduction of ammonium dinitramide (ADN) using cyclic voltammetry and differential pulse voltammetry techniques. ADN was reduced with higher rates at low potentials on GMGCE compared to GCE. The GMGCE exhibited fast response towards ADN with a detection limit of 2.0 × 10-6 M and a linear range of 2.5 × 10-6 to 8.5 × 10 -4 M. The possible interference from several common ions was tested. The proposed method was successfully applied in the determination of ADN in water samples. © 2014 Elsevier Ltd.

Shakur H.R.,Imam Hossein University
Physica E: Low-Dimensional Systems and Nanostructures | Year: 2011

In this article, zinc sulfide nanocrystal quantum dots were synthesized by reverse micelle method using polyvinyl pyrrolidone as surfactant. The various crystallite properties of these nanocrystals such as, size, d-spacing, lattice parameter, microstrain, intrinsic stress, X-ray density, specific surface area, dislocation density, porosity, and agglomeration number have been analyzed using X-ray diffraction spectrum. The transmission electron microscopy was used to calculate the size and monitoring morphology of the nanocrystals, while the scanning electron microscopy was utilized to investigate the surface morphology of nanoclusters. The various optical properties of zinc sulfide quantum dots such as absorption coefficient, extinction coefficient, optical band gap energy, Urbach energy, and threshold wavelength have been analyzed using UV-visible data. The photoluminescence was used to study the emission spectra of produced ZnS quantum dots. Moreover, Furrier Transform-Infrared studies revealed that ZnS quantum dots are pure. © 2011 Elsevier B.V.

Afghahi S.S.S.,Imam Hossein University | Shokuhfar A.,K. N. Toosi University of Technology
Journal of Magnetism and Magnetic Materials | Year: 2014

In this research synthesis of FeCo@C core-shell nanoparticles was done using a novel two step process including the microemulsion technique and alcohol catalytic chemical vapor deposition. X-ray diffraction, transmission electron microscopy, electron beam diffraction and energy dispersive spectroscopy confirm the formation of FeCo@graphite core-shell nanostructure. Compared with FeCo nanoparticles with an oxide shell, the graphite shell restricts the growth of the FeCo nanoparticles, leading to lower saturation magnetization and higher natural-resonance frequency. The electromagnetic characteristics including permittivity, permeability and loss tangents of FeCo nanoparticles/ nanoencapsulates were determined in the frequency range of 2-18 GHz. Results show that the graphite coating dramatically improves electromagnetic wave absorption of FeCo nanoparticles due to several dielectric/magnetic loss mechanisms. The main mechanism enhancing the dielectric loss tangent is Deby's dual relaxation phenomenon and for magnetic loss is the ferromagnetic resonance. The maximum reflection loss of -40 dB at 2.5 mm thickness and the maximum effective absorption bandwidth (RL<-20 dB) of 5.6 GHz at 3 mm thickness were obtained for FeCo nanoencapsulates. © 2014 Elsevier B.V.

Eshghi M.,Imam Hossein University
Canadian Journal of Physics | Year: 2013

Exact solutions and corresponding normalized eigenfunctions of the Dirac equation are studied for the Makarov potential by using the Laplace transform approach under the pseudospin symmetry. By using the ideas of SUSY and shape invariance, we obtain the energy eigenvalues equation. The wave functions of the angle part are obtained by using the Nikiforov-Uvarov method, too. Finally, we also discuss the special cases of this potential and the valence energy states can be produced from our solution for the hole state by taking appropriate transformation of parameters. © Published by NRC Research Press.

Eshghi M.,Imam Hossein University
Chinese Physics Letters | Year: 2012

Exact solutions of the Dirac equation are studied for the pseudo-harmonic oscillatory ring-shaped potential by using the Laplace transform approach and the Nikiforov - Uvarov (NU) method. The normalized eigenfunctions are expressed in terms of hyper-geometric series and use the NU and Laplace methods to obtain the eigenvalues equations. The obtained result of the eigenvalue equation is compared. At the end, one can find with a simple transformation the lower spinor component of the Dirac equation. © 2012 Chinese Physical Society and IOP Publishing Ltd.

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