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Open Access Article
1 - The assessment of Omega-3 fish oil pollution with mercury derived from shark and tuna fish in post-market surveillance in Tehran by cyclic voltammetry
بهروز اکبری آدرگانی لطیفه نویدپور مریم شکرچیFish oil is one of the best sources of fatty acids dietary supply. Recently, use of fish oil isenhanced based on its useful effects on human health. Unfortunately, due to industrial pollution,many fish and fish oils have high levels of mercury. Mercury is one of the mos MoreFish oil is one of the best sources of fatty acids dietary supply. Recently, use of fish oil isenhanced based on its useful effects on human health. Unfortunately, due to industrial pollution,many fish and fish oils have high levels of mercury. Mercury is one of the most poisonousmicroelement for the ecosystem. mercury is toxic and can damage the brain and the nervoussystem. The main object of this research was the assessment of Omega-3 fish oil pollution withmercury derived from shark and tuna fish in post-market surveillance in Tehran by cyclicvoltammetry. For this pupose fourteen fish oil brands was collected from market retail andtransferred to the laboratory. In this research, closed vessel microwave extraction and cyclicvoltammetric method was employed. The digestion process was perfomed via four steps in aconstant 50 bar pressure and a gradiant temperature from 145 to 200 ˚C. The mercury content offish oils was in the range of 11.03–107.11 ng/ml. Validation of parameters reveal that theprecision of developed method was 2.3 percent in mean standard deviation. In conclusion, fishsuch as swordfish and shark and tuna fish are also a source of exposure to the heavy metaltoxin, mercury. So the potential toxicity of omega 3 fish oil capsules with mercury must beconsidered and it is necessary to measure the mercury content of these capsules with a simple,precise, accurate and economic method. Manuscript profile -
Open Access Article
2 - Investigation of effective factors on the ammonia removal efficiency in the wastewater treatment plants using the air stripping process
Arezoo Zangeneh Sima Sabzalipour Afshin Takdastan Reza Jalilzadeh Yengejeh Morteza Abullatif KhafaieBackground and Objective: Removal of ammonia from wastewater in the treatment plants due to its dangerous and toxic effects on human health and biotic resources is essential. This study was aimed to investigate the effective operational parameters on the efficiency of t MoreBackground and Objective: Removal of ammonia from wastewater in the treatment plants due to its dangerous and toxic effects on human health and biotic resources is essential. This study was aimed to investigate the effective operational parameters on the efficiency of the air stripping process, determine their priority and degree of effect on ammonia removal and compare the ammonia removal efficiency during the air stripping process in the municipal wastetewater treatment plants using synthetic and real wastewater. Material and Methodology: In this study, the effect of each operating parameter on the ammonia removal efficiency including initial ammonia concentration, pH and temperature during the air stripping process for synthetic and real wastewater, respectively, based on standard methods (the Nesslerization method, preparation of standard solutions) using a spectrophotometer, pH meter and temperature module were evaluated. Findings: The results of this study showed that the maximum of ARE for synthetic wastewater with Air to water ratio 80 and an initial ammonia concentration of 59. 6 mg /l, pH 12.05 and temperature 46.3°C was %91. Also, the results of the study on the ARE during the air stripping process showed that the maximum of ARE (%91) for real wastewater (primary sedimentation tank effluent (PST)) with Air to water ratio 80 and an initial ammonia concentration of 61.04 mg/l, pH 12.53 and temperature 45.9 ° C was obtained. Discussion and Conclusion: Based on the results of univariate regression model, initial ammonia concentration˃ temperature˃ pH have the greatest effect on the ammonia removal efficiency in synthetic wastewater and real wastewater, respectively. In the multivariate regression model, the effect of temperature and pH on the ammonia removal efficiency in synthetic and real wastewater is increasing and decreasing, respectively. Based on the findings of this study, the air stripping process can be successfully used to remove ammonia from wastewater in the municipal treatment plants, especially in the tropics. Manuscript profile -
Open Access Article
3 - Simultaneous Adsorptive Stripping Differential Pulse Voltammetric Measurements of Trace Lead, Cadmium and Nickel in the Presence of 2-aminobenzoic Acid
Ebrahim Zarei Amir Izadyar Alireza Asghari Maryam Rajabi -
Open Access Article
4 - Design of a Planar Multiband Antenna Using Metamaterials
Sepideh Rezaee Yashar ZehforooshIn this paper, a four-band microstrip antenna using metamaterial structure is presented. The antenna proposed in this article, has an asymmetric structure and it is made up of two identical radiation elements and ground plane at the back. In this design, each radiation MoreIn this paper, a four-band microstrip antenna using metamaterial structure is presented. The antenna proposed in this article, has an asymmetric structure and it is made up of two identical radiation elements and ground plane at the back. In this design, each radiation element consists of a reciprocating capacitor, which is attached to a slotted triangular acetate at the end. The proposed antenna has a miniature dimension of 10×15 mm2. Also the proposed antenna has four resonances in frequencies of 3.19 GHz (1.25%), 6.22 GHz (10.74%), 7.18 GHz (5.19%) and 9.12 GHz (4.52%). Pattern and gain of the antenna are acceptable at resonant frequencies and the good consistency between the test result and the simulation confirm the accuracy of the antenna design. The proposed antenna is made and tested in the antenna laboratory. The results of the measurements are presented in the paper. Good consistency between test and simulation results confirms the accuracy and efficiency of the proposed multirole microstrip antenna design. Manuscript profile -
Open Access Article
5 - Predicting Strip Tearing in Cold Rolling Tandem Mill using Neural Network
A. Haghani A. R. Khoogar F. Kumarci -
Open Access Article
6 - Design, Simulation and Fabrication of Microstrip Hairpin and Interdigital BPF for 2.25 GHz Unlicensed Band
Omid Sharifi-Tehrani -
Open Access Article
7 - A New Analysis, Design and Fabrication of DVB-T/T2 LDMOS UHF Broadband Amplifier
Farbod Setoudeh Mohsen Pooya -
Open Access Article
8 - Performance Improvement of Fractal Microstrip Antenna with Metamaterial
Gohar Varamini Mehdi Khatir Mohammad Naser-Moghadasi -
Open Access Article
9 - Design and Fabrication of a Lowpass Filter Using a New Butterfly-Shaped Defected Ground Structure
Majeed Zaidan Vahid Rezaeian Saber Izadpanah Toos -
Open Access Article
10 - An Approximate Solution for the Scattering of High-Frequency Plane Electromagnetic Waves from a Perfectly Conducting Strip
Turgut İKİZ Emine AVŞAR AYDIN -
Open Access Article
11 - Plane Wave Diffraction Problem Analysis Using Microwave Technology and with Application for Breast Scanning
Emine Avşar Aydin -
Open Access Article
12 - Vertical strip metal-insulator-metal waveguide based on a silicon-on-insulator platform
Vahid Sadeghzadeh Maraghi Mahmoud Nikoufard Mahdi Eslami Seyyed Hossein Pishgar KomlehThis paper proposes a new ultra-compact strip metal-insulator-metal (MIM) plasmonic waveguide on a silicon-on-insulator (SOI) platform. The waveguide structure can efficiently propagate surface plasmon polaritons (SPPs) within a thin low-index SiO2 layer at an optical w MoreThis paper proposes a new ultra-compact strip metal-insulator-metal (MIM) plasmonic waveguide on a silicon-on-insulator (SOI) platform. The waveguide structure can efficiently propagate surface plasmon polaritons (SPPs) within a thin low-index SiO2 layer at an optical wavelength window of 1550 nm. The main parameters of effective refractive index, propagation length, confinement factor, and effective mode area were determined for the proposed waveguide with different waveguide widths. The simulation results were comparable with the in-plane MIM plasmonic waveguide. The proposed layer stack could be monolithically integrated with conventional and hybrid plasmonic SOI-based devices and has the potential of focusing light to nanoscale dimensions. Manuscript profile -
Open Access Article
13 - Free Vibration Analysis of Variable Stiffness Composite Laminates with Flat and Folded Shapes
B Daraei S Hatami -
Open Access Article
14 - Evaluation of promising rice genotypes for resistance to rice striped stem borer, Chilo suppressalis (Lepidoptera: Crambidae) in paddy field conditions
Farzad Majidi-Shilsar Meherzad AllagholipourThe objective of this study was to identify rice lines (genotypes) resistant to striped stem borer and to determine plant characteristics associated with resistance. In this research, a total of 63 rice lines were evaluated in the field under natural infestation conditi MoreThe objective of this study was to identify rice lines (genotypes) resistant to striped stem borer and to determine plant characteristics associated with resistance. In this research, a total of 63 rice lines were evaluated in the field under natural infestation conditions during 2016- 2017. The lines exhibited considerable variation for plant height (84.30-149 cm), stem diameter (3.7-6.3 mm), panicle length (21.1-32.9 cm), number of larvae (3.83-69.50), growth period (108-138 days), white heads infestation (1.11-11.72 %) and grain yield (3.7-8.2t.ha-1)in relation to the mentioned pest. The results showed that the white heads infestation percent had significantly correlated with plant height stem diameter and panicle length. And also, there was a significantly correlated the decrease of grain yield by increasing the stem diameter, more infestation and white heads. The cluster analysis based on the studied morphological characteristics showed that all genotypes were classified into three groups. So that, 8, 26 and 29 genotypes was located in A, B and C classes, respectively. Among all the genotypes, the lines of the third group (Class C) can be used as a source for breeding programs to achieve the new rice cultivars which is to be tolerant to rice striped stem borer pest. Manuscript profile -
Open Access Article
15 - Water types and carbonate saturation model of groundwater in middle Governorate (Gaza strip, Palestine)
Khalid Fathi Ubeid Mohammad Ramadan Al-Agha -
Open Access Article
16 - The effect of volume fraction and size of Al2O3 nanoparticle on heat transfer and flow characteristics in the heat exchanger with louvered strip inserts
Meysam Pouyanian Ashkan GhafouriIn this study, the effect of using louvered strip inserts in heat exchangers on flow and transfer characteristics is numerically investigated. The continuity, momentum, and energy equations have been solved using a finite volume method. The wall of the tube is heated wi MoreIn this study, the effect of using louvered strip inserts in heat exchangers on flow and transfer characteristics is numerically investigated. The continuity, momentum, and energy equations have been solved using a finite volume method. The wall of the tube is heated with a uniform heat flux boundary condition. This paper uses a louvered strip insert arrangement (forward) with a Reynolds number of 10,000. The effects of louvered strip slant angle of and pitch of 50 mm were used for Al2O3 nanoparticles with different volume fractions in the range of 1% to 4% and different nanoparticle diameters in the range of 20 nm to 50 nm, mixed in a base fluid (water) is used. The comparison of numerical analysis results with existing equations has shown a good convergence. The numerical results reveal that the Nusselt number has increased with decreasing the nanoparticle diameter. The results indicate a slight change in the skin friction coefficient when nanoparticle diameters of Al2O3 nanofluid are varied. The Nusselt number increases with increasing nanoparticle volume fraction of Al2O3 /water nanofluid, while it is found that pure water has the lowest Nusselt number value. Also, the nanofluid has reduced the wall's temperature more than the base fluids (water), which indicates the advantage of using nanofluids in improving the system's thermal performance. Manuscript profile -
Open Access Article
17 - Uruk Pottery, Based on Strip Survey of South Abu Fandowah Site, Khuzestan, Southwestern Iran
Aytakin Habibi Mohammad KaramiUruk period (3200-3000 BC), the era of civilization in southern Mesopotamia and Iran, is recognizable by material culture production changes that one of them was large quantity of plain pottery instead of before painted tradition. During the late Uruk period, in southwe MoreUruk period (3200-3000 BC), the era of civilization in southern Mesopotamia and Iran, is recognizable by material culture production changes that one of them was large quantity of plain pottery instead of before painted tradition. During the late Uruk period, in southwestern Iran, some settled sites flourished and became large centers especially in Susiana plain. Choghamish, Susa and Abu Fandowah were most important among them with more than 15 Ha. We would like to focus on Uruk potteries of one of the mentioned sites, which is Abu Fandowah, next to the Susa city in the Northern Khuzestan- southwestern Iran. It is surveyed and excavated in year 2006 but we will discuss about southern complex of above site that is surveyed by Strip method. We separated Uruk pottery into three main categories and tried to introduce most of Uruk wares rim forms, Beveled Rim Bowls and other decorations which are observable on the body sherds. Manuscript profile -
Open Access Article
18 - Design and Miniaturization of a Novel Fractal Microstrip Antenna for UWB Applications
Zeynab Zohrabi yashar zehforoosh -
Open Access Article
19 - Fractal Multi Input Multi Output Antenna for WLAN Applications
Saeed Mojarrad yashar zehforoosh -
Open Access Article
20 - Effect of number of planting rows in strip intercropping of maize, pintobean and soybean and their sole cropping on seed yield
F. Farahvash, A. Rahmati F. Jafari H. Amir HallajiTo evaluate the effects of rows of maize-pintobean, maize-soybean planted in strip intercropping and their sole croppings, an experiment using randomized complete block design with three replication, was conducted for two consecutive years at the Agricultural Research C MoreTo evaluate the effects of rows of maize-pintobean, maize-soybean planted in strip intercropping and their sole croppings, an experiment using randomized complete block design with three replication, was conducted for two consecutive years at the Agricultural Research Center of Islamic Azad University, Tabriz branch. Treatments were: A (intercropping of maize-pintobean, one row of each, B (intercropping of maize-pintobean, two rows of each), C (intercropping of maize-pintobean, three rows of each), D (intercropping of maize-soybean, two rows of each), E (intercropping of maize-soybean, two rows of each), F (intercropping of maize-soybean, three rows of each), G(sole cropping of maize), H (sole cropping of pintobean) and I (sole cropping of soybean). Experimental results showed that maize produced, in both years, highest (17818 kg/ha) using treatment D and lowest (15509 kg/ha) yields in treatment G. This indicates that maize produced higher yield in intercropping than sole cropping. Maize, also, produced highest yield in treatment D and lowest in treatment F. Pintobean had highest yield (2498 kg/ha) in treatment H and lowest (2073 kg/ha) in treatment A. Soybean, on the other hand, produced highest yield (4794 kg/ha) in treatment I and also lowest (3257 kg/ha) in treatment D. A a whole, it may be concluded that pintobean and soybean produce higher yield in sole cropping as compared to intercroppings. Manuscript profile -
Open Access Article
21 - Evaluation of Yield and Yield Components of Oilseed Rape in the Wheat-Oilseed Rape Strip Intercropping Influenced by Chemical and Biological Fertilizers
راشین Amirmardfar A. Dabbagh Mohammadi Nassab Y. Raei S. Khaghaninia R. Amini S.H. Tabataba VakiliTo evaluate the effects of wheat (Triticum aestivum) and oilseed rape (Brassica napus) strip intercropping on yield components, seed and biological yields of oilseed rape, field experiments were carried out as factorial based on randomized complete block design with thr MoreTo evaluate the effects of wheat (Triticum aestivum) and oilseed rape (Brassica napus) strip intercropping on yield components, seed and biological yields of oilseed rape, field experiments were carried out as factorial based on randomized complete block design with three replications at Research Farm of Tabriz University, Tabriz, Iran during 2010-2012 cropping seasons. The first factor consisted of four types of wheat and oilseed rape cropping system, sole crop of oilseed rape (A1),: strip intercropping with 8:3 (A2), 12:4 (A3) and 16:5 (A4) of wheat and oilseed rape rows, respectively and the other factor consisted of two fertilizer levels, B1: 100% chemical fertilizers (urea and triple superphosphate) and B2: 50% chemical fertilizers + biofertilizers (Nitrazhin and Barvar2). The results showed that strip intercropping of wheat- oilseed rape resulted in significant increase in yield components, seed yield per occupied unit area and biological yield per occupied unit area of oilseed rape as compared with mono-cropping. The number of silique per plant in intercropping systems was significantly higher than that of mono-cropping. The highest seed yield was obtained in the 16:5 rows of wheat-oilseed rape with 343.76 g.m-2 and the lowest mean was observed in mono-cropping of oilseed rape with 260.21 g.m-2. Biological yield per occupied unit area and seed yield per intercropped unit area in B1 were significantly greater than that of B2, but this treatment had no significant effect on the other traits. Because, B1 and B2 had no significant difference in seed yield per occupied unit area and due to the importance of reduction in chemical fertilizers consumption and food and environmental health care, strip intercropping of wheat-oilseed rape under 50% chemical fertilizers + biofertilizers can be recommended as a suitable cultural method. Manuscript profile -
Open Access Article
22 - Optimization of ECMAP parameters in production of ultra-fine grained Al1050 strips using Grey relational analysis
Peyman Keshtiban Mohammad Zadshakouyan Ghader Faraji -
Open Access Article
23 - Analysis of dust problem from the perspective of geopolitical crisis in the Persian Gulf region: In order to provide a functional model for western areas
Majid Abolfathi heidar lotfiThe main purpose of this thesis is to analyze and investigate the dangers of the microstrip from the perspective of the geopolitical crises of the Persian Gulf region: to provide an applied model for the western regions of the country. The main question of this treatise MoreThe main purpose of this thesis is to analyze and investigate the dangers of the microstrip from the perspective of the geopolitical crises of the Persian Gulf region: to provide an applied model for the western regions of the country. The main question of this treatise is how can one, by analyzing the dilemma of the microspheres from the point of view of the geopolitical crises of the Persian Gulf region, provide an applied model for the western regions of the country? In addition, the main question of the other questions of this research is that what are the current geopolitical crises in the Middle East? What are the effects of the microscope on the western regions? This paper uses the Swat model to categorize the important internal and external factors affecting the microstrip problem and identify the capabilities, shortcomings, opportunities and threats of the micro stats for the western regions of Iran in order to provide a strategic model for the regions of Iran. The hierarchical analysis process (AHP) has been used to measure the weight of the measures. The statistical population of the study consisted of 50 undergraduate students in political geography of universities of Tehran. The results of this treatise indicate that a significant part of the dangers of the rings has an outer root and that the insecurity caused by the geopolitical crises of the Persian Gulf region has made it harder to deal with the crisis of the microspheres. Manuscript profile -
Open Access Article
24 - Study the Percentage of Carbon and Ferrite in Layers of Steel (SA-516) by Strip Cladding with E316L
Ahmad Afsari Dara Fazel Jafar Karimisharifabadi Vahid Mehrabi -
Open Access Article
25 - Analytical Modified Model of Cold Rolling Process and Investigation of the Effect of Work Roll Flattening on the Rolling Force
Mohammad Heydari Vini Pedram Farhadipour -
Open Access Article
26 - A New Temper Rolling Force Model for Dry Thick Strip Considering Fully Elastic Contact
Pedram Farhadipour Mohammad Heydari Vini Sayed Mohammad Reza Loghmanian -
Open Access Article
27 - Using Artificial Neural Networks to Predict Rolling Force and Real Exit Thickness of Steel Strips
Mohammad Heydari Vini1 -
Open Access Article
28 - A Triangular Patch Antenna with a Trapezoidal Fractal with Two Sublayers with Complementary Layers
Mohammadreza Sepehri Mohammad Amin HonarvarIn this paper, the improvement of the radiation pattern and the properties of multi-band trapezoidal fractal antenna with self-complementary layers have been investigated. The antenna is excited by a microstrip feed-line with two sub-layers to increase bandwidth and imp MoreIn this paper, the improvement of the radiation pattern and the properties of multi-band trapezoidal fractal antenna with self-complementary layers have been investigated. The antenna is excited by a microstrip feed-line with two sub-layers to increase bandwidth and improve the radiation pattern. The dual-layered complementary arrangement has had positive effects on the resonance frequencies and improved the properties of the radiation patterns. This antenna offers a good efficiency, suitable bandwidth, and radiated pattern in a designed resonance frequency. Six bands (S11<-15 dB), with center frequencies of f1=0.9 GHz, f2=1.57 GHz, f3=1.85 GHz, f4=2.15 GHz, f5=2.5 GHz and f6=3.5 GHz are obtained within the band of (0.5-4) GHz. This antenna offers good efficiency which changes from 70% to 95%. The measurement results clearly confirm the simulation results Manuscript profile -
Open Access Article
29 - Improvement and Optimization of Homogeneous Composite in Array Antennas using Convolution Neural Network
Gohar Varamini Behnam Dorostkar YaghoutiAntenna structure and performance, bandwidth, gain and guidance are the most important performance indicators. For this purpose, RL homogeneous transmission line is very important due to low loss, phase changes, frequency bandwidth, zero and negative order resonance, mi MoreAntenna structure and performance, bandwidth, gain and guidance are the most important performance indicators. For this purpose, RL homogeneous transmission line is very important due to low loss, phase changes, frequency bandwidth, zero and negative order resonance, miniaturization and easy construction, and is very suitable in the design of broadband and array antennas. The right-left hand structure in the antennas due to the difference in the phase of the right part in the repetition of arrays and the thickness of the layer has phase delay and finally deviation of the radiation pattern. On the other hand, the blockage of the transmission line on the left causes bandwidth restriction and increasing the number of casualties in the system. In this paper, with the help of deep learning (DL), composite defects are solved and optimized arrayed antenna. The proposed antenna transmission line design in the range of 2-7 GHz, optimum resonance frequency of 4.5 GHz and convolution, dual resonance and spiral inductor neural algorithm are loaded onto the patch in four arrays. The use of convolutional neural network (CNN) in the left transmission line compensates for the right phase delay and finally enables optimal phase changes, correction of radiation pattern and continuous scanning of phase arrays. Also, by creating gaps in the microstrip patch, bandwidth limit is removed and the system losses are reduced. Secondary dimensions compared to the primary dimension are reduced to about 60% in size and miniature according to the smart modified model. The results of this improved composite showed an increase in bandwidth of 20.3 and the efficiency of the radiation pattern by more than 96%. On the other hand, small dimensions, appropriate frequency bandwidth and simple network design have been provided. Manuscript profile -
Open Access Article
30 - Design of an Active Integrated Antenna with Compact Image Rejection Mixer and Spurious Passbands Suppression of Antenna
Ali Reza Hazeri Ali Reza KashaniniaAn active integrated antenna (AIA) with compact image rejection mixer (IRM) is proposed and designed. The proposed IRM is composed of 2-element microstrip rectangular patch antenna, three compact branch-line hybrid coupler (BLC), two balanced mixers, a Wilkinson power d MoreAn active integrated antenna (AIA) with compact image rejection mixer (IRM) is proposed and designed. The proposed IRM is composed of 2-element microstrip rectangular patch antenna, three compact branch-line hybrid coupler (BLC), two balanced mixers, a Wilkinson power divider, and a lumped element hybrid coupler. The proposed IRM translates radio frequency (RF) (2.4 or 2.5 GHz) to two intermediate frequency (IF) and provides isolation to two possible IF. The IF and local oscillator (LO) power are chosen 50 MHz and 5 dBm, respectively. The proposed IRM is able to achieve image suppression with an isolation of approximately 20 dB. The conversion loss is lower 10 dB. The VSWR at two output ports are 1 and the VSWR at the RF port is greater than 1.8.The balanced mixer is composed of a compact BLC, two schottky diodes, two short-end stubs, and an open-end stub. By replacing the quartet-wavelength conventional transmission lines with equivalent t-type transmission line, the compact BLC is designed, which they can suppress upper order harmonics and spurious passbands of the antenna. Miniaturize, low cost, simple circuitry, and high performance, are the main advantages to simulation this AIA with IRM. The AIA with IRM is simulated by ADS software. Manuscript profile -
Open Access Article
31 - Design, Simulation and Fabrication of a Wideband Filter Using Multi-Mode Resonators in Three Layer Stripline Structure
Mehdi Karimiyan Pedram Seyed eftetahi Amir Mohammad KhezriIn this paper, in order to overcome the coupling and fabrication constraints of microstrip structures, 3 layer stripline structure be introduced and based on impedance steps and microwave coupled lines as impedance inverters and multi mode resonators, new and miniaturiz MoreIn this paper, in order to overcome the coupling and fabrication constraints of microstrip structures, 3 layer stripline structure be introduced and based on impedance steps and microwave coupled lines as impedance inverters and multi mode resonators, new and miniaturized structures are proposed. Using this structure, several 2-6 GHz wideband filters has been designed and simulated, and some effective techniques to reducing virtual resonances and improving slope of filter introduced. Finally, a wideband filter is fabricated and using simulation and measurement, efficiency of method is shown. Manuscript profile -
Open Access Article
32 - Design and Simulation of a Novel Broadband Circularly Polarized Microstrip Slot Antenna
Elaheh Shirazi Mohammad Amin HonarvarIn this paper, a novel broadband printed circularly polarized microstrip slot antenna fed by a co planar wave guide (CPW) is designed, analyzed and simulated. The structure of the proposed antenna is made of a modified stair-shaped patch in conjunction with a square gro MoreIn this paper, a novel broadband printed circularly polarized microstrip slot antenna fed by a co planar wave guide (CPW) is designed, analyzed and simulated. The structure of the proposed antenna is made of a modified stair-shaped patch in conjunction with a square ground plane with a stair-shaped slot inside it. By using a modified stair-shaped patch and square ground plane, additional resonances are excited and, hence, much wider impedance bandwidth can be produced, especially at the higher band. Moreover, by using this structure, especially by adding two rectangular strip to the ground plane, very broadband axial-ratio bandwidth is obtained. the proposed antenna has dimensions of 45×45×0.8 mm3, which is compatible with the requirements imposed by portable wireless systems. Simulation results exhibits a 81.7% (2.78-6.62 GHz) -10 dB impedance bandwidth and a 57.6% (3.5-6.33 GHz) 3 dB axial-ratio bandwidth. the antenna performance confirms its viability for commercial portable wireless systems. Manuscript profile -
Open Access Article
33 - Offering a New Computational Relationship to Evaluate the Bearing Capacity of the Strip Footing on the Two Frictional -Cohesive Layered Ground
Loghman Rahimi navid ganjian Mikaiel Youssefzadehfard Mehdi DerakhshandiIn this study, in order to provide a new analytical relationship for evaluating the bearing capacity of a two layered cohesive- frictional soil mass, 12 sets loading tests of physical model for three types of upper layers with different thicknesses and compactions. In c MoreIn this study, in order to provide a new analytical relationship for evaluating the bearing capacity of a two layered cohesive- frictional soil mass, 12 sets loading tests of physical model for three types of upper layers with different thicknesses and compactions. In continuation, a series of parametric studies were performed to evaluate the accuracy of the proposed relationship using PLAXIS 2D finite element software. In order to study the results of numerical modeling and control of the accuracy of the modeling, results of these analyzes were compared with the experimental results of corresponding physical models by considering the effect of different parameters)relative thickness, compaction ratio and different shear strength parameters of soil layers) on the failure mechanism and the ultimate bearing capacity of the soil. Considering the appropriate fit of the load-displacement curves, the failure pattern and the average difference of the bearing capacity about 3.3% between the physical and numerical models, show that finite element models have good accuracy in predicting the actual behavior of laboratory samples and the results of numerical simulations can be trusted. After the verifying of the numerical analysis results, the values of the bearing capacity obtained from both numerical and analytical methods for 88 different modes of the strip foundation with dimensions B = 1 and 2 meter and soil mass with different layering, depth and shear strength parameters were compared and a difference of about 7 and 12.5% were observed for foundations with dimensions of 1 and 2 meters, respectively. The results showed that there is a relatively good agreement between all three experimental, numerical and analytical methods in the evaluation of the ultimate bearing capacity and the analytical relationship can predict the process of limit pressure changes in terms of the relative thickness of the layers and the evaluation of the ultimate bearing capacity for various states of the strip footing resting on two layeres ground with relatively good accuracy. Manuscript profile -
Open Access Article
34 - The effectiveness of teaching philosophy through comic strip media on the quality of mindfulness of fifth grade elementary students
fatemeh poursajadi Soroush SozangarThe aim of the authors research is to present an educational plan usingFacebook and comic strip media to improve the quality level of children's mental awareness.Method: The present research is of applied type and its statistical populationwas all fifth grade students o MoreThe aim of the authors research is to present an educational plan usingFacebook and comic strip media to improve the quality level of children's mental awareness.Method: The present research is of applied type and its statistical populationwas all fifth grade students of Dezful city, among whom 60 people were selected by two-stage cluster sampling method and replaced in two groups of 30 people, experimental and control. The tools used in this research wereresearcher-made comic strip and Grieco (2010) Mindfulness Questionnaire inChildren and Adolescents (CAMM), which was completed in two phases: pre-test and post-test. In order to implement the independent variable, in 8 sessions and during 4 weeks, 8 stories from classical Persian texts were selected for the experimental group and the same topics were performed for the control groupthrough the lecture method.The findings showed that the educational program had a significant impact on the growth of students' mindfulness, so that the effect size on mindfulness was 62.32% (P<0.05.(Conclusion: Fabak's approach using the comic strip media as a visual andattractive media for teaching content can lead to strengthening the level of children's mindfulness in real situations and deepening the learning experiences. Manuscript profile -
Open Access Article
35 - Three-dimensional Finite Elements Numerical Modeling for Strip Foundations on Granular Soils Reinforced with Micro-piles
Leyla Hamedi Ali Sanaeirad -
Open Access Article
36 - Effect of Geogrid on Increasing the Bearing Capacity of Strip Foundations in Sandy Soils
Farhad Pirmohammadi Alishah Mehdi Kanani Mehdi Mohammadrezaei Sattar Shafiei -
Open Access Article
37 - Geotechnical analysis and zoning in order to evaluate the allowed load capacity of Iranshahr city - East of Iran
Abdolsattar Naroui Mohsen Pourkermani Soheila Bouzari Mahmoud Almasian Afshin Ardalan -
Open Access Article
38 - Numerical modeling and seismic behavior analysis of strip foundation on sandy soils
Morteza Alemyparvin Mehdi Kouhdaragh -
Open Access Article
39 - A new metaheuristic genetic-based placement algorithm for 2D strip packing
Jaya Thomas Narendra S. Chaudhari -
Open Access Article
40 - Performance Evaluation and Comparison of Schools with Masonry System Treated by Braces, FRP Strips and Friction Dampers Using Fragility Curves (Case Study: Khorram Abad)
Saeed BahariPour Mahdi Nani Mojtaba Hosseini Abdolreza sarvghad Moghadam Mehran Mehran S. RazzaghiDue to the importance of seismicity in the region of Iran, the improvement and retrofitting of structures has always been the focus of competent employers and engineers. In order to achieve the goals of this research, a three-story concrete school structure in need of i MoreDue to the importance of seismicity in the region of Iran, the improvement and retrofitting of structures has always been the focus of competent employers and engineers. In order to achieve the goals of this research, a three-story concrete school structure in need of improvement has been selected. Then, the investigation of possible improvement options (three improvement options: 1 with braces, 2 with friction damper, 3 using FRP in the columns) has been done in Opensees software. In the following, incremental nonlinear dynamic modeling and analysis under selected earthquake records using the recommended FEMA P695 accelerometers for co-based seismic records (5 acceleration maps for the far field and 5 acceleration maps for the near field) has been performed. Then a comparison between the fragility curves for different states has been made. In this research, the behavior of the building against different earthquake intensities is shown According to the results obtained from other non-linear analyses, it can be seen that the maximum capacity obtained is in good agreement with the results of these analyzes and this method is very suitable for evaluating the behavior of buildings and ultimate capacities against earthquakes. Also, it can be a good alternative method for approximate methods such as pushover analysis to determine the performance level of the building and to determine the behavior of the building. Manuscript profile -
Open Access Article
41 - One Sixth Wavelength Printed Monopole Blade Antenna
امیرمجمد چیت ساز نسرین امیری -
Open Access Article
42 - Design of Dual-band Impedance Matching Circuit Using T-shape Shunt Stub
Hadi Andalib Ali-Abadi Fatemeh Geran Gharakhili -
Open Access Article
43 - Designing a Two-Band Micro-Strip Filtering Antenna for Use in Wi-Max Telecommunication Systems and the Fifth Generation Mobile Cellular Communication Networks
Elnaz Ghanadian Mohammad Amin Honarvar -
Open Access Article
44 - Anodic stripping voltammetry determination of Pb, Cd, Zn, and Cu in blood samples of children in some areas of Ibb governorate
Nabil A.F. Alhemiary Mohamad A.H. Al-Duais Ali A. Mutair Anwar A. Wassel Bassam M. Alshrabi Bilal A. Albadany -
Open Access Article
45 - Determination of ultra trace of thiosemicarbazide by adsorptive stripping voltammetric method
Laleh Hosseinzadeh Hossein Khani Shahryar Abbasi -
Open Access Article
46 - Determination of trace amounts of lead by adsorptive cathodic stripping voltammetry in the presence of xylenol orange
Ali Niazi Roya Tajik Samira Kamel Foladi -
Open Access Article
47 - Determination of Trace Amounts of Gold in Environmental Samples by Adsorptive Stripping Voltammetry of Its Complex with Rhodamine Using Osc-Pls
A. Akrami A. Niazi F. Bagheban-Shahri -
Open Access Article
48 - Assessment of barley seeds chemical treatments with some conventional fungicides on barley strip controlling
Soleiman Jamshidi Ahmad Ghaffari Mohammad Sadeghzadeh Mehdi MianajiIn order to evaluation of conventional fungicides effect on barley strip disease controlling, infected barley seeds of PropStar variety were collected from Achachy region barley fields located in Miyaneh, Iran and their infection percentage has been determined about 72% MoreIn order to evaluation of conventional fungicides effect on barley strip disease controlling, infected barley seeds of PropStar variety were collected from Achachy region barley fields located in Miyaneh, Iran and their infection percentage has been determined about 72% by culture plate test method. An experiment was conducted in greenhouse conditions for evaluation of 0.5, 1 and 2 % of Carboxin 75WP, Carboxin-tiram 75WP, Tilt 250EC, Carbendazim 60WP, Rovral-TS 52.5WP, Benomyl 50WP, Diniconazole 2WP, Difenoconazol 3DS, Maneb 80WP and Mancozeb 80WP on seed viability, as completely randomized design with 4 replications. The results revealed that all treatments didn’t have significant difference with control rather than Tilt and 2% of Carboxin-tiram. Another experiment was conducted as randomized complete block design with 3 replications in field condition. After seed treatments with recommended doses of above fungicides, 100 seeds was sown in a 10 m rows with 1 cm intervals in each plot. Plant infection percentages were calculated and analysis of variance and mean comporisons with Duncan’s multiple range test in 5% probability showed that Benomyl and Carbendazim had no effect on disease controlling. Also, other fungicides had significant difference with control and all of them can be recommended for field applications. However the most effective fungicides were Rovral-TS and Mancozeb and Maneb and Difeniconazole had the least effect on the disease, statistically. Manuscript profile -
Open Access Article
49 - The effect of thermal and chemical treatment on seed-born inoculum of Pyrenophora graminea, the causal agent of barley strip disease in greenhouse
Soleiman Jamshidi Mehrdad Abdi Ali FaramarziBarley strip disease caused by Pyrenophora gramineae is found in most of barley growing areas in the world and most part of Iran. This foliar disease in barley causes emptiness and extreme weakness of seeds and considerable yield losses. The disease is MoreBarley strip disease caused by Pyrenophora gramineae is found in most of barley growing areas in the world and most part of Iran. This foliar disease in barley causes emptiness and extreme weakness of seeds and considerable yield losses. The disease is monocycle and seed-born and the fungus survives as mycelium in the hull, pericarp and seed coat. Therefore, the best way for disease controlling is the eradication of seed born inoculum by different methods. In order to evaluate the effect of various thermal and chemical treatments on disease control, infected seeds were collected from diseased barley fields with Prop star cultivar and the infection percent was defined approximately 89.5% with "Culture plate test" method. Thermal treatments consisting of tennothcrapy during 5 and I 0 minutes in 52 oC warm water and chemical treatments with Carboxin-Tiram, lrnazalil, Mancozeb, Tilt and Maneb were applied. Infected seeds treated with lap water were considered as control and the project ran in completely randomized design. For each treatment, 20 treated seeds were sawed in three replications in pots. 60 days after planting, the effects of various treatments on fungus seed-born inoculum and seed viability were studied by evaluation of infected plant percentage. The thermal treatments were recognized to be unsuitable for seed disinfection because of extraordinary and over than 50% effects on seed viability and low effect of disease control. Among chemical treatments, lmazalil was the best for disease control and other treatments had significant difference with it. But there were no significant differences between the other fungicides. But application of Tilt is not advisable because its significant effect on seed viability. Manuscript profile