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A faunal study of leafhoppers (Hemiptera: Auchenorrhyncha: Cicadellidae) was conducted in some parts of Khuzestan Province (southwest of Iran) in 2014 and 2015. Totally, 90 species belonging to 49 genera and seven subfamilies were collected and identified. Most of samples were collected by using sweeping net and Malaise trap and a few by aspirator and sticky yellow trap. As a result of this study 47 species are recorded from Khuzestan Province for the first time and eight species are new records for the fauna of Iran including Euscelidius schenckii (Kirschbaum, 1868); Hardya (Hardya) melanopsis (Hardy, 1850); Paradorydium (Paradorydium) lanceolatum (Burmeister, 1839); Hecalus prasinus (Matsumura, 1905); Psammotettix emarginatus Singh, 1969; Grammacephalus pallidus (Linnavuori, 1978); Helionidia punctulata (Ramakrishnan and Menon, 1974) and Eupteryx (Eupteryx) kaghanensis Ahmed, 1969. For each species geographical distribution in Iran are completely mentioned. In addition morphological data and illustration of adults and their male genitalia are given for the eight newly recorded species.

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Spotted Amber Ladybird, Hippodamia variegata (Goeze, 1777) (Coleoptera: Coccinellidae) is an important predator of aphids and some other insect pests. Since shape and size variation may affect biological characteristics of an insect, multivariate analysis of shape variations in four geographically isolated populations of H. variegata (Isfahan, Shahrekord, Shiraz, Yasuj) was performed based on eight landmarks of hind wing. According to the analysis, significant difference in weight matrices (as shape variable) was detected. The cluster analysis separated Isfahan population from other populations. According to ANOVA, we found significant difference in centroid size (as size variable), so that the two populations, Isfahan and Shahrekord, had larger wings than the two other populations. Distribution of 80 individuals based on partial warps on the relative warp axis placed Isfahan population in a separate group while the others had overlap and irregular distribution.  

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The fauna of the superfamily Bombylioidea was studied in Alborz province, Iran during 2012. Two families (Bombyliidae and Mythicomyiidae), eight genera and ten species were identified, of which two species, Exoprospora dispar Loew, 1869; Parageron lutescens (Bezzi, 1925), are new records for the Iranian fauna. An identification key for the species of the family Mythicomyiidae known from Iran is given.

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A faunistic survey was conducted to identify the leafhoppers in the southwest of Iran (Khouzestan Province) in 2014. Among the collected materials, Aconurella nuristana Dlabola, 1957 is recorded for the first time for Iranian leafhoppers fauna. Diagnostic characters and geographical distribution of the newly recorded species is presented briefly.

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Bark beetles are one of the most important pests in forests. Because of their small size and highly similar morphological characters, molecular approaches may be quite useful for a valid species determination. In this context molecular identification represents an accurate and modern method for species identification. The purity and high quantity of extracted DNA have important role in successful amplification of the target fragment of the genome. The aim of this study was comparing different DNA extraction methods in order to choose the highest quality and quantity of DNA extract for the identification of bark beetles. During the study bark beetles were collected from different parts of the North forests of Iran. Five different DNA extraction methods were performed and evaluated on individual specimen including Chelex, Phenol chloroform, CTAB, salting out and Lysis buffer in the laboratory. The quantity and quality of extracted DNA were measured by spectrophotometer and gel electrophoresis. The result of DNA quantity mean ranged between (23.6-579.7 ng/µl) and the mean quality which was measured by 260/280 ratio (0.9-1.8). The statistical analysis was done by SPSS software, revealing significant differences between extraction methods. The results suggested that Chelex and salting out showed the highest quantity of all used methods.

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The family Meloidae Gyllenhaal‎, 1810 (Coleoptera), commonly known as blister beetles, exist in warm, dry, and vast habitats. This family was studied in Kerman province of Iran during 2018–2019. The specimens were collected using sweeping net and via hand-catch. They were identified by the morphological characters, genitalia, and acceptable identification keys. To improve the knowledge of the Meloidae species of southeastern Iran, faunistic investigations on blister beetles of this region were carried out. Totally, 30 species belonging to 10 genera from two subfamilies (Meloinae and Nemognathinae) were identified. Among the identified specimens, 22 species were new for fauna of Kerman province.

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This study was carried out in the province of Kurdistan (Iran) during April to August 2015 in order to document the click beetle fauna (Coleoptera: Elateridae) of this region. The specimens were collected using sticky traps, window traps and pan traps. Fifteen species from six genera were identified, of which three species are new for the fauna of Iran: Melanotus kravchenkoi Platia, 2010, Melanotus orbachorum Platia, 2010 and Melanotus chikatunovi Platia, 2010. In addition, nine species are recorded from the province of Kurdistan for the first time. Brief diagnoses for the new record species from Iran and zoogeographical information for all species are provided.

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Seed-eater eurytomids of the genus Bruchophagus Ashmead, 1988 were collected from Ardabil and Qazvin provinces in northwest Iran. Various host plants were collected and their seeds were kept in laboratory conditions from 2007 to 2012. Scope of this paper focused on the Bruchophagus species reared from seeds of Astragalus brachydontus Boiss (Fabaceae). We obtained six species of Bruchophagus including B. astragali Fedoseeva. They were B. saxatilis Zerova; B. mutabilis Nikolaskaya; B. nikolskayae (Zerova); B. turkestanicus Zerova, and B. robiniae Zerova. Of which, Bruchophagus saxatilis Zerova, is a new record for the Iranian fauna. New host associations were found for all collected species and it seems a complex biological association that was recorded for the first time. Currently, 11 species of Bruchophagus are occurred inassociated with seeds of A. brachydontus. All previously known species of the genus Bruchophagus in Iran are also tabulated.

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The purpose of this study is identify the effect of economic and social capital of bazaars in the Qajar period on their role in the process of the Iranian Constitutional Revolution, until the issuance of the constitutional decree by Mozaffar al-Din Shah.This Research Method is historical and for collect information have been used Travelogues, memoirs, documents and historical documentd.

The results showed that the social capital of the bazaars in the Qajar period along with their economic capital played a major role in the revolutionary role-playing of the bazaars and the victory of the constitutional revolution.

The bazaars of the Qajar period, by using their accumulated social capital in the urban society and using money and labor under their cover, were able to play a revolutionary role in the first constitution and gain power in the field of politics.

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This paper deals with the collision-free path planning of planar parallel robot by avoiding mechanical interferences and obstacle within the workspace. For this purpose, an Artificial Potential Field approach is developed. As the main contribution of this paper, In order to circumvent the local minima problem of the potential fields, a novel approach is proposed which is a combination of Potential Field approach, Fuzzy Logic and also a novel algorithm consisting of Following Obstacle as well as Virtual Obstacle methods, as a hybrid method. Moreover, the inverse kinematic problem of the 3-RRR planar parallel robot is analyzed and then the aforementioned hybrid method is applied to this mechanism in singular-free case. It is worth mentioning that, in this paper, all the probable collisions, i.e., the collision between the mechanism and the obstacles and also among the links, are taken into accounts. Two general cases have been considered in collision-free path planning simulation; the first case considered a mobile robot in several workspaces and the second one was assigned to the 3-RRR planar parallel robot path planning. Results of the simulations, which are implemented in C programming language for the sake of real-time purposes. reveal that for the both cases, the newly proposed hybrid path planning method is efficient enough for the mobile robot, or the end-effector of the planar parallel robot to reach the goal without colliding with the obstacles.

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In this paper, the axisymmetric actuator disk method (2D) with acceptable accuracy and low computational cost based on computational fluid dynamics have been adopted to study the flow behavior around the horizontal wind turbine rotor and the wake. For this sake, a C code is developed as a self-developed user-defined function (UDF) in commercial software package ANSYS FLUENT. The rotor is modeled as a virtual disc and its effect is added to the Navier-Stokes equations as a sink term. The results obtained for the 5 MW NREL wind turbine in this study show the appropriate accuracy and speed-up. The interaction of two wind turbines in the wind farm has been investigated. The results depict that the output power and thrust of the downstream rotor due to the presence of an upstream turbine drop up to 88% and 57%, respectively. Also, radial distribution of the downstream rotor power shows that at a closer distance, the middle part of the blade has a larger contribution to power generation. Further, the effect of downstream rotor on the upstream rotor performance is up to 1.5% and 0.7% reduction in power and thrust respectively.

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Lake Urmia is one of the water bodies that face severe drought conditions nowadays. Therefore, the present study aimed to study monthly time series of the lake water level. Modeling the series was accomplished in two ways. First, all data were used to analyze the water level time series of the lake. Although the results of generating were quite well, the results of validity test were not satisfying. Second, only water level data after the year 1995 were used, which showed a continuously decreasing trend. These data start from the year when dam constructions and operations in Urmia Watershed were increased one by one. The values of R² and RMSE were 0.99, 0.001 m, respectively, for generating the data at this stage. These values were 0.93 and 0.03 m for the validity test of the model (from 2005 to 2009). The results of our study show that the lake water level behavior changed after 1995 due to constructing many dams in Urmia Lake Watershed.
 

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Combustion chamber has a crucial role in gas turbines and has a significant effect on the pollution and efficiency of them. Due to the complicated flow in combustion chambers because of high turbulence intensity, flow mixing, and flame behavior, prediction of the performance of such chambers is very complicated. There is a vital need for experimental investigations to study and understand the flame behavior in combustors. This experimental study was performed using a can type combustion chamber and LPG fuel at atmospheric conditions. First, stability curve, temperature distribution in the combustion chamber, and its exit plane in 6 flow conditions and then flow behavior were evaluated. The pollution at the outlet was obtained in different conditions and equivalence ratios. The results show that the flame tends to go downstream of the combustion chamber when the fuel mass flow rate increases (or in other words, by increasing the equivalence ratio) in constant air mass flow rate and finally exits from the chamber. By increasing the air mass flow rate in constant fuel mass flow rate, CO pollution is increased, and NOx pollution is decreased.

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Due to the increasing population and lack of construction space, the use of high-rise buildings around the world is inevitable, so the use of sections with high strength to weight ratio that take up less space has been considered by researchers. One of the sections that has been considered by researchers and engineers to achieve this goal is composite columns, especially steel filled with concrete (CFT). These columns use the advantages of steel and concrete both and also have advantages such as eliminating column formwork in construction, providing complete enclosure conditions for concrete, preventing concrete parts from collapsing and tearing from the steel profile of the column and delay. The buckling of steel sheaths due to the presence of concrete is more common than other composite columns. CFTs also have higher strength, lateral stiffness and ductility than reinforced concrete columns of the same dimensions. The use of external stiffeners for replacement with continuity plates has been considered by researchers and design engineers and various forms have been proposed so far. The results of previous research have shown that external stiffeners are a good alternative to continuity plates.
In the present study, the behavior of steel frames with Hollow Steel Sections(HSS) and Concrete Filled Tube(CFT) Columns has been investigated. After launching the test setup and locating the displacement meters and dynamometers, the structure is subjected to cyclic loads according to the defined loading protocol. Three samples of two-opening and two-story frames with hollow box columns (HSS), concrete filled box (CFT) and concrete filled box with horizontal reinforcement nets have been evaluated experimentally and different parameters Their strength, ductility, hardness, energy absorption and cyclic behavior have been studied. In addition, the impact of the presence of concrete and horizontal reinforcement nets has been evaluated. On the other hand, in order to investigate the effect of using external stiffeners and horizontal bar mats in the frame, all connections of the two-story frame of the present study selected of this type. The results show that the use of concrete has improved the strength of connection due to the reduction of the buckling of the column plates, but the ductility has decreased. External stiffeners are used in all specimens, and as expected, the plastic hinge is moved into the beam, providing the idea of strong column-weak beam. In another part of the research, the behavior of the CFT frame and The presence of horizontal bar networks of the panel zone, which shows its effect of it in improving the behavior of the frame. The use of concrete in steel sections increases the strength of the frame, but since it is used in frames with CFT columns, beams with weaker sections show little reduction or little increase due to the use of concrete properties in pressure and Steel is in tension. On the other hand, the presence of concrete reduces the buckling of the column plate. In addition, the box-shaped sections around the concrete cause the concrete to be enclosed and ultimately increase the strength and energy absorption of the structure.

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Careful and focused decision-making in the food sector reduces the challenges threatening food systems' stability. Besides, it can optimally control any changes that result in food shortages. The present study aimed to identify identifiable factors' effects on food insecurity using a dynamic system with an emphasis on consumption behaviors. A dynamic model was developed to understand the long-term interaction between individual characteristics, average cost, average income, and hygiene status, and a dynamic model was then validated and operationalized among 1,000 Alborz Province’s households randomly using a questionnaire. The base scenario for predicting food insecurity changes revealed that food insecurity had increased over ten years, resulting in changes in social and economic status and vulnerability of urban society. Four additional scenarios indicated that the average cost and income could directly affect the food insecurity status in Iran by indirectly influencing policies to increase food security, health, and hygiene. Individual characteristics and food security also influence food insecurity and reinforce the relationship between these variables. The study revealed that dynamic systems modeling could be a valuable tool for assessing food insecurity policies and their factors in developing countries.