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Horizontally curved bridges have been observed to suffer severe structural damage during past earthquakes so determining the seismic performance of curved bridges is crucial due to the complex dynamic behavior of these structures because of their irregular geometry and non uniform mass and stiffness distributions. Analyzing and plotting the capacity curve of these structures can be costly and time-consuming. As a result, many efforts have been made to simplify the structural models of these bridges and reduce the computational workload required for their analysis. This article presents a straightforward method to convert the multi-degree-of-freedom system of these structures into an equivalent single-degree-of-freedom system, ensuring that the capacity curve of the equivalent structure closely matches that of the original structure with minimal error. In this study, the OpenSees program was used to extract the stiffness and mass matrices of a curved bridge structure. These matrices were then condensed into one-by-one matrices for mass and stiffness using dynamic condensation equations. The characteristics of these matrices were applied to a single-degree-of-freedom stick model. In this model, the obtained mass is placed at the top of a stiff rod (stick), which is connected to the ground by a spring (zero-length element) with the equivalent stiffness obtained. A nonlinear static pushover analysis of the bridge structure was performed to obtain the capacity curve. An equivalent bilinear curve was then drawn, and the yield shear force and yield displacement were determined. The nonlinear behavior of the single-degree-of-freedom structure was modeled using the Steel02 material available in the OpenSees library by zero length element utilizing the yield shear force and yield displacement magnitudes of the curved bridge. The capacity curve of the stick model, which has a single degree of freedom, showed an error percentage of 7% compared to the bridge's capacity curve. This indicates acceptable compliance with the capacity curve of the main structure, making the stick model a viable alternative for repeated analysis of the curved bridge structure. This study also included a sensitivity analysis to investigate the effects of increasing the curvature radius and decreasing the curvature angle of the bridge on its capacity and effective mass. Due to the dynamic condensation of the curved bridge structure, the influence of all degrees of freedom was considered in the stiffness and mass matrices, unlike methods that rely solely on the first vibration mode for dynamic condensation. Comparing the capacity curve of each structure with that of an equivalent single-degree-of-freedom system revealed that the structure's capacity increases with a larger curvature radius. In contrast, the lowest capacity was observed in the straight bridge scenario. Additionally, modal analysis of the studied models showed that increasing the bridge's curvature radius leads to a longer structural period, while a decreasing curvature angle has a similar effect. However, the period of the straight bridge was longer than all the other models. Furthermore, as the curvature radius increased, the mass contribution percentage of the first mode in the translational x-direction decreased, whereas the translational mass contribution percentage in the y-direction and the rotational mass contribution around the z-axis increased.

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Using of language skills has long been among the most conspicuous weak points of learners of Arabic language as a foreign language. By interviewing some professors and experts of Arabic language teaching, a number of topics were recognized as worthy to be investigated further as sources of weakness. These topics include “sources of boredom and tiredness of students in learning Arabic language”, “the appropriateness of existing instructional materials”, the appropriateness of the teaching methods”, “the sources of students motivation”, “ the effect of teaching methods on motivating students” in general and “ the appropriateness of methods for teaching listening” in particular. A researcher made questionnaire was used to elicit the viewpoints of students and professors regarding each of the above-mentioned topics. The results indicated that learners of Arabic language are not de-motivated but bored and tired due to the overall teaching context, in which they are learning this foreign language. Among the major sources of this boredom are “inappropriate teaching methods”, inappropriate instructional materials” and “inappropriate techniques in teaching listening comprehension”.

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Background: Low back pain is the most common cause of disability and absence from work among young and middle-aged people. As there is limited knowledge regarding this problem among Iranian students, this study aimed to determine the prevalence of low back pain and its ‘related socio demographic factors among students of Islamic Azad University, Tehran, Iran. Material and Methods: This is a cross-sectional study in which 200 students of Islamic Azad University were selected purposively. Demographic questionnaire and Ronald-Morris Disability Scale were used to collect data regarding characteristics and disability caused by back pain. Data were entered SPSS₁₆ and analyzed through descriptive and analytic statistics. Results: In total, 190 students including 78 (41%) men and 112 (59%) women were assessed. Of all studied students 113 individuals 65.9% were suffering from low back pain and 91 students
(47.8%) were suffering from pain related disability. Body mass index (BMI) was normal in most participants. There was significant negative relationship between low back pain and physical activity (P = 0.006). Conclusion: To sum up, the results of this study verified a significant relationship among low back pain and disability. Moreover, the students who were more active and were living in good socio-economic status were less probably to suffer from low back pain and disability.

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Indo-european worldview has been reflected considerably in the formation of the Persian poem and prose, because of its literary and contextual grandeur. It has affected many works in various aspects, so that its mythology has been used in the prominent works such as Firdausi's Shahnameh and the Kyrgyz epic of Manas. However, the way of possessing such a worldview by Shahnameh and Manas is the subject of current research. In this regard, we have described and considered the behavior of heroes in the two works based on the George Dumezil's Three Functions Theory. Our study reveals that the tree functions of the theory have been applied all over the stories of these two epics. This theory is based on the two vises: coordination and contrast; meanwhile Shahnameh and Manas are based on goodness and evil, which are symbolized in heroes such as Siavash/Bakai as well as Rostam/Manas. The first section consists of the wisdom, intellect and calmness symbols, and the second section is related to the symbols of violence, stringency warmness, militancy, and self discipline; while ordering the Quadruplet elements system, provides the people with peace and self-coordination by its force. Moreover, there are invulnerable Demons and Personages in both epics such as Esfandiar (in Shahnameh) and Malgun and Mady Khan (in Manas). However, their only vulnerable spots are their eyes through which they must be killed and their dominance must be ended. This is the motif of “Killing the Demon by blinding him”, which forms one of the worldview's elements mentioned in Indo-european mythology.

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The methods and techniques of performance evaluation are the key issues in organizational and academic researches.  One of the problems of performance evaluation in working groups is dealing with group performance evaluation and individual performance evaluation. A comprehensive performance evaluation system not only assesses performance at different levels (individual and group) but also considers the dependence and relations between them. Existing systems cannot consider the effect of different levels on each other. In this paper, we use Data Envelopment Analysis method for studying performance as a multi level phenomenon. For this purpose we use a multi-level Data Envelopment Analysis Model for evaluating performance of working groups in a governmental organization in Iran. The model views the groups at the highest level in the hierarchy as the decision-making units whose performance are optimized. Part of the output from the optimization is a set of performance measures for the components of those top level decision-making units. The result shows that the multi-level DEA model is an appropriate model for measuring groups and their members’ performance at simultaneity.

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The objectives for this study were first to understand and estimate energy consumption in each stage of production and processing of milk using regional data and second, suggesting improvement opportunities. A cradle to gate assessment of market milk was performed by separating the system into three stages: agronomy, animal farm and processing plant. Data were collected from multiple sources e.g. questionnaire, published papers, national and international databases, and the processing plant database. Throughout the study, ISO framework and International Dairy Federation guideline on life cycle assessment were used. The functional unit (FU) was one liter of pasteurized milk packaged in plastic pouch at the processing plant gate. The average energy demand for producing 1 kg of fat-protein corrected milk at farm-gate was 10.8 MJ, although for the final packaged milk, it was 12.5MJ. Main stages in overall energy use of FU were agronomy 68 %, animal farm 19 % and processing plant 13%. The average energy use for raw milk production was 2-5 times higher than previous European reports. To enhance efficiency in this sector, we need to assess other regions’ potentials for feed and milk production and then to focus on agronomy stage for lower energy use by optimization of irrigation, or even importing energy intensive feed such as barley and alfalfa from other countries.

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Ph.D. Student of Persian Language and Literature , Tehran University & Researcher of the Academy of Persian Language and Literature Romanticists have been the center of global attention for two decades by providing a new viewpoint in the fields of literal, cultural, social and political global studies. Romanticism as a live school of thought is a fundamental Part of modern culture more than being a real phenomenon of 19th century. Actually it is a new approach in global studies more than a mere literal school. The most important principle of this school is individualism, individual perfection and individual unlimitation,with emphasizing the role of imagination. From the literary aspect it is a new and ontological evaluation through poetry. Imagination has an important place in the aesthetics of Romanticism, actually the special approach of this school to Imagination, should have specified and distinguished it from the others. Modern art and literature in Iran comes from our familiarity with western thought which lead us to understand western culture and Philosophy. Definitely it is very important to understand different origins of this thought for a better understanding of it. In this article, we survey one of the Romanticism aesthetic features, i.e. "imagination" and its emergence in Persian poetry during the "constitutional time", as the earliest time of this style evolution.

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Geometry is considered one of the fundamental structures of Iranian traditional art and architecture, and some of its displays can be seen in most of fine ancient works. Studying geometry, as one of the main fields of Iranian art and architecture, is of more importance when it comes to the word of architecture, as it seems impossible to define it without relying on geometry. Architecture has been founded on "construction" as it is necessary to utilize accurate geometry and order; and in architecture, Order and planning are manifested as geometry. In other words, the basic factor that makes different parts of architecture united is nothing but geometry, and through this uniting and coordination between parts of architecture culture the survival and endurance of that culture becomes possible. In general, order and geometric plan assists the designer to predict the course of the plan and design. Not only the Iranian traditional architecture works from the ancient times to the Islamic era have been relied upon the geometric principles, but also the contemporary architecture is based on such principles. This study is concentrated on the exact recognition of geometric principles, intellectual roots and theoretical basics of Iranian traditional architecture in addition to the analysis of the advent of such items in the contemporary architecture. The main aim of this research is to recognize the geometric principles of the traditional architecture and its application in the contemporary architecture. In other words, we aim to answer to the question, what are the geometric principles of the traditional architecture and how is the manifestation of such principles in the contemporary architecture? The results show that the use of geometric order in the plan, along with the application of hidden geometry and creation of geometric understanding through the static sense have been more applied in the contemporary architecture compared to other characteristics of Iranian traditional architecture and the traditional architecture archetypes and motives have always attracted contemporary architects.

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Among the most important lessons, as the most striking aspect of literature in any language and by which the main objectives of this field are met, are the courses related to the poetic texts. A great deal of Arabic language and literature is devoted to literary texts, among which much is devoted to the poetic texts. But for many years, the poetic texts are taught with traditional methods in this field and many of the teachers do not use new strategies in teaching of these texts. This has led the poetic texts not to be successful in reaching their main goals, meaning the improvement of literary talents of students and strengthening their desire and motivation to their field. This study tries to deal with the appropriate strategy performances in teaching Arabic poetic texts in Arabic language and literature useing survey and questionnaire methods. The population of this study includes the fourth and higher semester undergraduate students and Arabic language and literature field professors in the Universities of Tehran, Allame Tabatabaei, Beheshti and Tarbiat Moallem. The findings demonstrated that in many students’ and professors’ point of view, new strategies of teaching of poetic texts (i.e. semantic perception of poetry, aesthetic expression of verses and stylistic analysis) are performed less than the traditional strategies pertaining to correct reading of texts and expression of grammatical points.

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Aims:One of the most important issues and challenges facing developing societies is the physical identity of buildings and urban facades. Cities, under the influence of modernity, have an identity problem, and the concept of urban identity in the process of cognition and perception presents a multi-dimensional and complex phenomenon. The physical identity of cities has become an influential category in city lifeThis article is based on the question that - How can a solution or a guideline be formulated to improve the formal identity and exterior appearance of architecture in the capital and a metropolis like Tehran, which is in line with today's tastes and intellectual level? Methods: The research method in this research is qualitative survey and research of applied type, and to answer the research question, first from the library method to examine the effective factors in the formation of physical identity, then through the questionnaire asked from the experts and professors of architecture. is placed

Findings: The statistical population consisted of 273 architecture professors, and finally, among the effective factors with the highest priority among the effective factors in the physical identity of the buildings, the combination of traditional and modern facades, the use of details and decorations in the facades, the use of sustainable materials, the spirit Nowadays, using the past model and paying attention to diversity and avoiding uniformity and homogeneity has had the greatest impact.

Conclusion: There are statistically significant differences between different respondents in their attitude towards facade parameters (mass and joint, openings, architectural details and materials). These results show the multiplicity and variety of trends in the practice of architecture for different jobs. It is also clear that the main reason for the significant difference between the averages is related to the fact that the respondents believe that these parameters had a significant impact on the continuity of the architectural identity.

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In all languages, grammar instruction is one of the most important concerns of language teaching connoisseurs. In Arabian language, due to its specific structural and instructional properties, grammar and its teaching procedure have been investigated by teachers and connoisseurs for decades. Similarly in Iran, Arabic grammar instruction has been one of the most important components of teaching this language forever; so many of famous connoisseurs and book authors in Arabic grammar are Iranian. However, nowadays, one of the most challenging fields in teaching Arabic in Iran is grammar instruction. Despite of instructing 20 units in B.A. Arabic language and literature, it seems that students are facing with paramount deficiencies in applying Arabic grammar since it is for long years that grammar is instructed with old methods and many professors are not using modern and proper. strategies. The present study attempts to study instructional methods and the rate of implementing proper strategies by a survey and questionnaires. The research findings showed that traditional deductive method is more frequently used in grammar instruction, and new strategies, namely technology and contributive application and strategy, are implemented less than traditional methods in providing feedback information.

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Historical texture of Islamic city, with its latent physical and cultural value, has high degree of identity; hence, maintaining historical texture is considered as an essential identity for survival of cities. In fact, identity is the response to what is and who is, that identifies individual characteristic results from mental emotions of daily presence and expanded social communication. In other words, identity is a phenomenon which takes place in historical context of community. Over the time, the sense of identity is internalized within individuals, leads their behavior and finally integrates the community. Behavioral unity created at society level seeks for a framework to satisfy the behavioral and mental needs of individual and society. With its specific ideology, Islamic city demands special behavior performable in its specific framework. Modern cities are suffering from identity crises, because of basic changes of the cities without any link to the past. One of the reasons of identity crises in modern cities is inefficacity of historical textures. Inevitably, the changes will happen over the time, hence, continuity along with changes that allows relationship between past and present will balance these changes. This is a qualitative, descriptive-analytical study, reviewing constituent components of historical texture identity of Islamic-Iranian cities in order to deal with identity loss of these textures. The data collection method was based on library and historical documents. Evaluation and study of historical texture structure of Iranian cities indicate that historical textures of cities are treasures of history and culture of the ancients in their identity are influenced by Islamic urbanization identity. However, these textures are considered as documents of history, culture and identity of a nation, therefore, identification of this valuable heritage enables recognition of identity and movement of human. In other words, it can be stated that “old urban textures are creative and dynamic place to find out position of human in the world and his connection with the past, a place for environmental changes and a different view to the life of future and now.” Generally, the main characteristic of physical structure of old Iranian- Islamic city can be summarized in spatial coherence principal: physical organizations of old Iranian cities are based on spatial connection between elements of: 1) downtown, 2) neighborhood center through spaces and connecting elements, 3) main paths, and 4) square. Referring to historical texture of Iranian cities, it is obvious that formation and maintenance of them were based on special principles of Iranian climate and culture, and their framework has been consistent through historical, cultural, social and environmental continuity. Therefore, it has special identity and characteristic. Studies show that the main formation elements of historical texture of Iranian-Islamic city’s identity include citadel, great mosque, market, residential areas and road network. Citadel was a collection of buildings and governmental organization of city and headquarters of the ruler with spatial relation to the market and great mosque. Great mosque was built in a proper place as a politic religious center, the center of city’s sacred person and under his influence. The shape and dimensions of mosque land was dependent to the facilities of texture around it and the needs of internal development, its external form had its special pattern and form. Every city had at least one linear market that begun from the gate and continued to the center of city and ended around the great mosque. The local places of Iranian-Islamic city had special geographical unity. Deadend allies, allies, paths and neighborhood centers gave entity to neighborhood. The neighborhood consists of residential houses, allies, public facilities of neighborhood center such as mosques, local markets and bathrooms, reservoir and cafes. Connection network is formed organically around the old texture of Iranian city according to formation of past functions and taking into account the human scale. The main characteristics of connection network structure of old neighborhoods include short access and in pedestrian scale with significant social role, complexity of paths according to climatic condition and urban security. In general, it can be stated that citadel, great mosque and market were the three main principles of an Iranian-Islamic city. Great mosque was the main physical element of an Islamic city and market was the symbol of traditional architecture and urbanization of Iran which had the main role in city. In Iranian-Islamic cities’ places such as great mosque, market and center of government, houses etc. not only maintained their own places and special characters in urban space hierarchy and played their own roles, but also formed a united collection together that spatially shows the city as a coherenceentity. Coherence and correlation between spatial elements and their activities in historical texture of Iran cause these textures to seem a coherent entity and as a manifestation of identity. On the other hand, spatial values of these cities are formed by continuity and physical and observational quality of urban spaces. For confronting identity loss in historical textures, a nostalgic view to the history should be put aside and accept the changes during the time. Change is an inseparable matter that can lead to sustainable identity along with continuity. Identity revival of historical textures of Iranian-Islamic city is maintaining cultural continuity at present, past and future of the city. This cultural continuity which is accessible through recognition of concepts and organizational principles of urban spaces in historical cities of Iran and implementation of them in new urban space design, gives identity and authenticity to society. The present study is seeking to evaluate the constituent elements of mentioned textures through recognition of identity nature. Reviewing constituent elements of traditional Islamic cities, we want to find a way to help environment respond the needs of the time, as well as be in consistency with historical form and space.

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Fusarium proliferatum, as a toxigenic fungus, is one of the important agents of onion basal rot (FBR). Among the control methods of the disease, biological control is considered as one of the best options. In this study, Trichoderma harzianum strain T100 at the rate of 1 × 10⁶ cfu/g was mixed with pot soil artificially infested with F. proliferatum. Also Glomus mosseae was applied to each pot at the rate of three grams of soil containing 80 chlamydospores/ml. Combination of T100 and G. mosseae was used as well. Onion seeds were disinfected & planted in pots, arranged in completely randomized design in 4 replicates under greenhouse condition and finally, the individual or combined effects of these bioagents were assessed on FBR control and also root colonization by Glomus 23, 30 and 36 days after sowing. Inoculation of Arbuscular mycorrhizae improved onion growth effectively, but its biocontrol effect was not considerable. Trichoderma amended soil decreased disease incidence by 25% but its usefulness as biocontrol agent was reduced in the course of time. AM root colonization was decreased in plants in presence of Trichoderma. Nevertheless, the disease control in combination of Trichoderma and Glomus treatment was better than the treatments by each one of the agents singly. The disease control achieved by fungicide seed treatment was inferior to that of Trichoderma and Glomus in combination.  

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Abstract The element free Galerkin (EFG) method, which is based on the moving least square (MLS) approximation, requires only nodal data and no element connectivity. These features make the method more flexible than the conventional FEM. Nevertheless, direct imposition of the essential boundary conditions in the EFG method is always difficult because the shape functions obtained from the MLS approximation do not have the Kronocker-delta property. A new method named "the complementary integral method" is proposed here to overcome this difficulty. The presented method is more consistent with the variational basis of the EFG method. Several numerical examples are used to illustrate the implementation and performance of the method. The numerical examples including the Poisson's equation and 2D static and dynamic elasticity problems show that the method converges fast with reasonably accurate result for both the unknown variables and its derivatives.

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The purpose of this paper is to examine the role of semantic and syntactic rā morpheme in Sorani Kudish based on Van Valin’s (1996, 1997, 2007) Role and Reference Grammar.  In this paper, it is shown that attaching –rā to the verb causes to absent all specific roles related to actor, e.g. agent, force, instrument and other specific roles such as experiencer, performer, consumer, etc. in the syntax level. These specific roles directly affect the undergoer. Since in all of the mentioned cases, the manifestation of -rā causes to the absence of actor in the syntax level, the crucial role of this morpheme is an anti-actor. In terms of semantic properties of NP, the more agency of NP, the more attaching –rā to the verb. Although the manifestation of -rā often occurs in the sentences containing two-argument verbs. It also occurs in intransitive sentences containing actor, and causes to the absence of the actor. Moreover, based on the presence of –rā morpheme in a structure, it further plays the role of a non-active morpheme, and it is shown that all non-active structures have semantically actor.

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“Create” is the Lord’s act and “creator” and “creativity” are among his characteristics. Since he has created the man from his effigy and has blown through his soil, as the Lord’s Caliph on earth, the man requires to be a symbol of the God’s characteristics. “Create” and “creation” are virtually ascribed to the man, as well, indicating the creation of artistic works and creativity in acts and deeds. They are meant to signify inventiveness, capability of dominating the creatures, tackling the problems, providing, preparing and constructing the most appropriate living conditions. This seems to be quite plausible in the present era since the man has gained power in dominating the creatures. The present study investigates a path to the creation of artistic works, in particular, architecture by comparing it to the procedure of creation in nature and generally to the universe regarding Islam and the Holy Quran. Also, it discusses the interaction between an architect and the whole universe and envisages a general perspective based upon his own creation. In this regard, this study seeks answers to the following questions: ● Is the man_ himself as a creature _capable of creating? ● What are the principles and features taken into account regarding the creation of the universe? ● What are the commonalities between the creation of the universe and the creation of an architectural work? In so doing, a library research and a field study is applied considering interpretational analysis. It, then, follows that as the Lord endows the spirit of creation into the man’s corpse, the man his Caliph on earth_ also gives life to raw materials by blowing his spirit of creation and there comes the birth of Art from mankind. In a sense, creation is always performable and within the procedures of creation opposite elements are juxtaposed to supplement each other; a kind of variation from the same origin to perfection. In other words it can be pointed out that in creation the Lord has manifested integrity by similarity and has endowed identity to every element by purification.

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Aims: In the past decade, drug resistance in Gram negative bacilli has become a serious problem. The production of extended spectrum beta-lactamase (ESBL), AmpC beta-lactamase, and metallo beta-lactamase (MBL) enzymes in Klebsiella pneumoniae strains is the mechanism of drug resistance among these commonly isolated Gram negative bacteria from clinical specimens. The aim of this study was to assess the frequency of β-lactamase enzymes, including extended spectrum β-lactamases (ESBLs), metallo-β-lactamases (MBLs), and AmpC beta-lactamases, in K. pneumonia strains isolated from urine samples referred to medical laboratories in Aliabad.
Materials & Methods: A total of 780 urine samples were collected from patients suspected of having UTI from March to June 2017. In positive urine samples, K. pneumonia isolates were identified by biochemical tests. Antibiotic resistance pattern was determined by disk diffusion method, and phenotypic confirmatory test was performed for detecting ESBLs, MBLs, and AmpC BLs producers.
Findings: Out of 378 positive samples for UTI, 97 K. pneumonia strains were isolated. Most of the isolates (more than 90%) were resistant to ampicillin and amoxicillin; however, imipenem and amikacin were effective antibiotics against the isolates. The frequency of ESBLs, MBLs, and AmpC BLs producers was determined as 33.3, 21.3, and 5.1%, respectively.
Conclusions: In this study, 14 isolates were simultaneously positive for ESBL and AmpC BL production, and 2 isolates were co-producer of ESBL and MBL. This finding could have a great impact on the management and treatment of UTI cases. Therefore, detection of beta‑lactamases is of great importance for controlling and reducing the spread of ESBL, AmpC BL, and MBL producing strains.

 

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Need analysis (NA) is one the important elements of the curriculum that tries to detect lacks, wants, necessities and the gap between the existing curriculum and developed curriculum. NA is a powerful tool that helps clarify and validate true needs. It enables educators and practitioners to shape the curriculum development that bases the content of language courses on the communication needs. This work analyzes the language lacks of the Arabic language and literature students of Iranian universities. The method of study is survey, and the research tool is questionnaire. The study sample is consisted of two groups of students and teachers. The method of data analysis is quantitative. The main question of this study is: “To what extend do students have problems in language skills” and “To what competence does problems belong?” The results showed that the students' language skills are above the average difficulty, and they have linguistic problems arising from the lack of communicative competence.