Zangeneh N.,Islamic Azad University at Yasuj
IIOAB Journal | Year: 2016
One of the challenges of the today’s residential architecture is the optimized use of the renewable energies. In line with this and to achieve appropriate designing patterns the survey of the traditional architecture which is designed consistent with the climate can be helpful to the designers in reaching to this objective. Since, a great part of Iran is located in the dry and warm climate one of the most important climatic accomplishments obtained by the Iranian traditional architecture is the use of some elements for the purpose of exerting a chilling effect on the temperature welfare and comfort. Among such climatic elements are the pleasant and favorable spaces called springhouses. The survey of the way such spaces work and the effect they have on the comfort of the residents determines the way these spaces are taken into practical use for the purpose of creating a chilling effect in the today’s designs. In the present study we have made use of interpretive-historical methodology and the analyzed sample in the current study is the springhouse situated in Shiraz’s Foroogh Al-Malek House. And the data has been collected based on a documentary method accompanied with the field studies and observations. And the researcher also measured the temperature and humidity for two consecutive days in various points in the springhouse in three different occasions of morning, noon and evening and finally the researcher came to this conclusion that the existence of a springhouse assists in cooling the space. The current study is seeking to figure out that how helpful to the temperature comfort of the residents can be the establishment of a springhouse in the warm and dry climates and that can finally result in the emerging-saving effect in the warm and dry climates. © 2016, Institute of Integrative Omics and Applied Biotechnology. All rights reserved.
Behnammoghadam M.,Islamic Azad University at Yasuj
International Journal of Rehabilitation Research | Year: 2017
The aim of this study was to evaluate the efficacy of eye movement desensitization and reprocessing (EMDR) on the phantom limb pain (PLP) of patients with amputations within a 24-month follow-up. This study was a randomized-controlled trial. A total of 60 patients with amputations were selected by a purposive sampling and patients were divided randomly into two experimental and control groups. Samples were assigned through randomized allocation. EMDR therapy was administered individually to the experimental group participants in 12 one-hour sessions over a 1-month period, In each session, the patient completed the Subjective Units of Distress Scale and a pain-rating scale before and after the intervention. Follow-up measures were obtained 24 months later for the experimental group. The participants in the control group were measured on the two scales at an initial session and again after 1- and 24-month follow-up. The mean PLP decreased in the experimental group between the first and last sessions and remained so at a 24-month follow-up. No decrease occurred for the control group over the 1- and 24-month period. The differences were statistically significant (P<0.001) according to a repeated-measures analysis of variance. EMDR therapy proved to be a successful treatment for PLP. Because of its efficacy and the fact that the positive effects were maintained at the 24-month follow-up, this therapy is recommended for the treatment of PLP. Copyright © 2017 Wolters Kluwer Health, Inc. All rights reserved.
Chehri K.,Razi University |
Hasani S.M.,Islamic Azad University at Yasuj
Journal of Crop Protection | Year: 2017
Wild grasses are the most important primary feedstuffs which are susceptible to contamination with toxigenic fungi belonging to Aspergillus spp. In order to explore diversity of Aspergillus species associated with the inflorescences of gramineous weeds, infected inflorescences were collected from wild grasses in western parts of Iran. Fifty-six Aspergillus isolates were obtained from all diseased spikes and based on morphological features identified as 4 species i.e. Aspergillus niger (26) followed by Aspergillus flavus (24), Aspergillus fumigatus (4), and Aspergillus japonicus (2). The identification of A. flavus was confirmed using species specific primers of AFLA-F/AFLA-R by producing amplicons about 413 bp. In this study, aflatoxins (AFs) contamination of wild grasses was evaluated by enzyme linked immunosorbent assay (ELISA). Natural occurrence of AFs could be detected in 24 samples ranging from 0.63- 134.86 μg/kg. The highest AFT levels were detected in samples from Ravansar, Bisetoon, Mahidasht, and Sarpol Zehab (up to 50 μg/kg), which is more than the recommended limits by European Union standard and National Standard of Iran (20 μg/kg for animal feed). © 2017, Tarbiat Modares University. All rights reserved.
Salami N.,Islamic Azad University at Yasuj |
Shokri A.,Payame Noor University
Superlattices and Microstructures | Year: 2017
In this work, we present a detailed investigation of the influences of intrinsic spin-orbit coupling (ISOC) as well as Rashba spin-orbit coupling (RSOC) on the spin-resolved transport properties and net spin polarization of molybdenum disulfide (MoS2) nanoribbons including different configurations. For this reason, we generalize the tight-binding model by including the effects of the ISOC on all the atoms and a RSOC induced by a vertical electric field. The results predict a noticeable spin polarization in along to the field for the armchair MoS2 nanoribbon close to the Fermi level, which is originated mostly from edge states. Where as, the induced spin polarization in the zigzag MoS2 ribbons is much smaller than that of the considered armchair ones. Contrary to the RSOC, which it can not introduce significant spin polarization in the ZMoS2 the ribbon with width about 1-2 nm, the combination effect of an exchange field and Rashba spin-orbit interaction induces a spin-selective current especially close to the Fermi level. The numerical results may be useful to engineer and design magnetic-field-free spintronic devices based on the MoS2 nanoribbons. © 2017 Elsevier Ltd.
Ghaedi M.,Yasouj University |
Shokrollahi A.,Yasouj University |
Hossainian H.,Yasouj University |
Kokhdan S.N.,Islamic Azad University at Yasuj
Journal of Chemical and Engineering Data | Year: 2011
The objective of this study was to assess the suitability and efficiency of activated carbon (AC) and multiwalled carbon nanotube (MWCNT) for the removal of Eriochrome Cyanine R (ECR) molecules from aqueous solutions. The effect of different variables in the batch method as a function of solution pH, contact time, initial dye concentration, AC and MWCNT amount, temperature, electrolyte, and so forth by the optimization method has been investigated. ECR contents were determined using a UV-vis spectrophotometer before and after ECR adsorption on the AC and MWCNT, and the removal percentage was calculated using the difference in absorbance. The sorption processes followed the pseudosecond order in addition to intraparticle diffusion kinetics models with a good correlation coefficient with the overall entire adsorption of ECR on both adsorbents. Equilibrium data fit well with the Langmuir and Tempkin models with a maximum adsorption capacity based on the Langmuir equation of (40.6 and 95.2) mg·g-1 for AC and MWCNT, respectively. Thermodynamic parameters such as change in enthalpy (δH°) and entropy (δS°), activation energy (Ea), sticking probability (S*), and Gibbs free energy changes (δG°) were also calculated. Judgment based on the obtained results of thermodynamic values shows the spontaneous and endothermic nature adsorption processes on both adsorbents. © 2011 American Chemical Society.
Azizi S.,Islamic Azad University at Yasuj |
Ahmadloo E.,Islamic Azad University at Darab
Applied Thermal Engineering | Year: 2016
An artificial neural network model was developed to predict convective heat transfer coefficient (HTC) during condensation of R134a in an inclined smooth tube for the entire range of inclination angles at different saturation temperatures and regardless of flow pattern. The network was designed and trained using a total of 440 experimental data points collected from the literature. Inclination angle, mass flux, saturation temperature and mean vapor quality were used as input variables of multiple layer perceptron (MLP) neural network, while the corresponding HTC was selected as its output variable. By trial-and-error method, MLP network with 18 neurons in the hidden layer was achieved as optimal structure of the ANN which made it possible to predict the HTC with a high accuracy. Mean absolute percent error (MAPE) of 1.48% and correlation coefficient (R) of 0.997 for training data and MAPE of 1.94% and R value of 0.995 for testing data were obtained. Also, 95% and 99% all data were within ±5% and ±7% error band, respectively. MAPE of 1.61% and R value of 0.9963 were calculated for all data. These results confirm the high ability of the ANNs for predicting the HTC values for the entire range of inclination angles and independent of the flow pattern. © 2016 Elsevier Ltd
Ghaedi M.,Yasouj University |
Kokhdan S.N.,Islamic Azad University at Yasuj
Desalination and Water Treatment | Year: 2012
Oxidized multiwalled carbon nanotubes (MWCNT) were used for the removal of methyl red (MR) from aqueous solutions. The effects of variables, such as initial solution pH, initial dye concentration, temperature, and sorption time, on MR removal were studied and optimized. Fitting the experimental equilibrium data to various investigated isotherm models, such as Langmuir, Freundlich, Tempkin, and Dubinin-Radushkevich (D-R) models, showed the suitability of the Langmuir model with the highest correlation coefficients. The calculated thermodynamic parameters indicated that the removal of MR by MWCNT is an entropy-driven and endothermic process. The experimental data were analyzed by different kinetic models, such as pseudo-first order, pseudo-second order, and Elovich and intraparticle diffusion models. It was found that the second-order equation and intraparticle diffusion models are the rate-limiting factor and control the kinetic of the adsorption process. © 2012 Desalination Publications. All rights reserved.
Naderi M.,Khorramshahr Marine Science and Technology University |
Wong M.Y.L.,University of Wollongong |
Gholami F.,Islamic Azad University at Yasuj
Aquatic Toxicology | Year: 2014
In the recent years, there has been a growing concern about the production and use of bisphenol-A substitute, namely bisphenol-S (BPS). Due to its novel nature, there have been few studies addressing the ability of BPS to disrupt the endocrine system of animals. In the present study, zebrafish (Danio rerio) embryos were exposed to and reared in various concentrations of BPS (0, 0.1, 1, 10 and 100. μg/l) for 75 days. Then adult males and females were paired in spawning tanks for 7 days in clean water and the consequent effects on fish development, reproduction, plasma vitellogenin (VTG), sex steroids and thyroid hormone levels were investigated as endpoints. After 75 days of exposure, there was a skewed sex ratio in favor of females. The results also showed that body length and weight significantly decreased in males exposed to 100. μg/l of BPS. Gonadosomatic index was significantly reduced in fish at ≥10. μg/l. Hepatosomatic index exhibited a significant increase in both male and female fish. At ≥1. μg/l of BPS, plasma 17β-estradiol levels were significantly increased in both males and females. However, plasma testosterone showed a significant reduction in males exposed to 10 and 100. μg/l of BPS. A significant induction in plasma VTG level was observed in both males and females at ≥10. μg/l of BPS. Plasma thyroxine and triiodothyronine levels were significantly decreased at 10 and 100. μg/l of BPS in males, and at 100. μg/l in females. Egg production and sperm count were also significantly decreased in groups received 10 and 100. μg/l of BPS. Moreover, once time to hatching and hatching rates were calculated for fertilized eggs the postponed and decreased rates of hatching were observed. Taken together, these results suggest that developmental exposure to low concentrations of BPS has adverse effects on different parts of the endocrine system in zebrafish. © 2014.
Rezaei G.,Yasouj University |
Vaseghi B.,Yasouj University |
Doostimotlagh N.A.,Islamic Azad University at Yasuj
Communications in Theoretical Physics | Year: 2012
Simultaneous effects of an on-center hydrogenic impurity and band edge non-parabolicity on intersubband optical absorption coefficients and refractive index changes of a typical GaAs/Al xGa 1-x As spherical quantum dot are theoretically investigated, using the Luttinger - Kohn effective mass equation. So, electronic structure and optical properties of the system are studied by means of the matrix diagonalization technique and compact density matrix approach, respectively. Finally, effects of an impurity, band edge non-parabolicity, incident light intensity and the dot size on the linear, the third-order nonlinear and the total optical absorption coefficients and refractive index changes are investigated. Our results indicate that, the magnitudes of these optical quantities increase and their peaks shift to higher energies as the influences of the impurity and the band edge non-parabolicity are considered. Moreover, incident light intensity and the dot size have considerable effects on the optical absorption coefficients and refractive index changes. © 2012 Chinese Physical Society and IOP Publishing Ltd.
Namazian Z.,Islamic Azad University at Yasuj
International Journal of Mechanical and Mechatronics Engineering | Year: 2016
This study examines a new device aimed at reducing drag on commercial vehicles. The computational fluid dynamics (CFD) technique is utilized to the analysis of air flow around this device and also to optimize the geometry of device that has important effect on drag reduction. At first, simplified dimensions of a commercial vehicle are modeled as demonstrated in literature and the coefficient of the drag is measured through the analysis of the fluid flow. After choosing various different geometries with the addition of the new device and picking out the best geometry, the coefficient of the drag in the new position is measured and a comparison is made with the base model. The results indicate that there is about 22% drag reduction in the new state in comparison to the base model. © February 2016 IJENS.