Showing 13 results for Ayatollahi
Volume 2, Issue 2 (Summer 2014)
Abstract
Haft-Owrang is one of the poems of the Ninth-Century poet, Abdol-Rahman Jami. An important illustrated version of Haft Owrang is called Sultan Ibrahim Mirza`s Version that is a master piece of Miniature, which has been illustrated by the artists of Mashhad school. The story of “Saint Josef's Survival from the Well” is one of the Haft-Owrang`s subjects illustrated by artists at the time.
This paper is going to compare Jami's poems with the paintings of "Saint Josef`s survival from the well", attributed to Mozafar–Ali by descriptive-comparative method. It studies whether the literary style and figures of speech of Jami have affected the illustration of this painting, and measures the percentage of this influence through quantitative scales. It concludes that 22% of paintings are in line with the poems, while 78% of them are not. This shows the freedom of illustrators in their act of illustrating, their independency towards the poems, and their use of imagination, environment, and visage in creation of these works.
Volume 3, Issue 1 (1-2017)
Abstract
Background: Brucellosis is one of the most prevalent infectious diseases in Iran, which is shared between humans and animals. Brucellosis is caused by Brucella species and transmitted via unpasteurized milk or dairy products, which has been reported at least in 80 countries.The present study aimed to evaluate the prevalence rate of seropositive cases of brucellosis in Yazd, Iran.
Materials and Methods: In this retrospective cross sectional study, seropositivity rate of brucellosis was examined for 12258 patients. The Wright test (1.80 or higher) was used for diagnosing brucellosis. The obtained results were statistically evaluated by chi-square which is a trend analysis method.
Results: The seropositivity rate of Wright test was reported to be 178 (1.5%), which was significantly higher in the summer (43.3%) and spring (29.7%) than other seasons (P = .000). It was also significantly higher in men (53.9%) (P = .000) than in women, and in people over 40 years (41%) (P = .000) than in other age groups.
Conclusion: Brucellosis seropositive studies provide very good information in order to help us in investigating the impact of brucellosis.
Volume 4, Issue 1 (spring 2023)
Abstract
Aims: The studies on measuring the quality of public space in Iran and the world literature show a kind of standardization in the use of quality measurement criteria.While the concept of the quality of public space could be perceived differently,concerning space type and the political-economic-social background of the formation and evolution of public space can provide a different understanding.It seems that in assessing the quality of public space,the focus is mostly on quantitative and statistical methods,and understanding the nature of space has not played a significant role in measuring quality.This research provides a new path to measuring the quality of public space based on a combination of qualitative and quantitative methods.
Methods: Haft-Hoz square has been selected as the research study to validate the proposed process. The combination of content analysis, historical-interpretative method, in-depth interviews and compilation of oral memories, behavioral analysis, and correlation analysis have been used in this research.
Findings: This research presents a new methodology based on seven steps, including:identifying quality criteria based on international literature,identifying quality criteria tested Iranian literature on public spaces,combining the criteria of the first and second steps, and validating the possibility of evaluating the selected criteria based on field study,a historical-interpretative study of the transformation of the form of public space in different historical periods,conducting behavioral studies based on Jan Gol's method,conducting in-depth interviews with users who have a long history of using the space to extract oral memories and identify the most critical space quality measures over time and quantitative analysis reveals the correlations of quality measures.
Conclusion: Providing a comprehensive methodology in evaluating the quality of urban public spaces is the most important result of this research.
H. Sahraei , F. Ayatollahi , A. Golpour Hassanalideh , A. Pirali Zefrehei , F. Zohieri, A. Hedayati ,
Volume 8, Issue 1 (Winter 2019)
Abstract
Aims: The aim of the present study was to investigate the immunoval prebiotic performance on growth indices, hematological parameters, and rainbow trout carcass composition.
Materials & Methods: Immunoval prebiotic was added to the diet in 4 levels of 0.05%, 0.1%, 0.15% and 0.2% and a diet without prebiotic was used to feed the control group. Each diet was randomly used for fish with an initial weight of 13.66±0.54g in three replicates.
Findings: After 8 weeks of feeding, the final weight of fish fed with 0.1%, 0.15%, and 0.2% prebiotics was significantly higher than the fish of the control group (p<0.05). The food conversion ratio in all treatments fed with prebiotic was significantly lower than the control group (p<0.05) and the lowest amount was in 0.15% treatment. The specific growth rate in fish fed with prebiotic was higher than the control group (p<0.05). Also, there were significant differences in the parameters of red blood cells, white blood cells, lymphocyte and neutrophil in fish fed with prebiotic diet and the control group (p<0.05). In the carcass analysis, protein content was significantly higher than the control group and the highest amount was seen in 0.1% treatment. The amount of fat and carcass ash decreased significantly in the control group and the lowest amount was observed in 0.15% treatment.
Conclusion: Addition of immunoval prebiotic with 0.2-0.15% rate to rainbow trout diet had positive effects on growth indices, blood parameters, and carcass composition
Volume 8, Issue 3 (Summer 2022)
Abstract
Backgrounds: Staphylococcus aureus is one of the major causes of nosocomial infections. Biofilm formation is an important virulence factor of S. aureus, leading to its high resistance to antibiotics and evasion from host defenses. This study aimed to assess the prevalence and antimicrobial resistance profile of biofilm-producing S. aureus strains and characterize genes involved in biofilm formation.
Materials & Methods: A total of 79 S. aureus strains were isolated from 1000 clinical samples and characterized using phenotypic, biochemical, and molecular tests. The biofilm production ability of isolates was examined using the microtiter assay. Moreover, the expression of genes involved in biofilm production (psm A and psm B) was screened using real-time PCR. Finally, antibiotic susceptibility testing was done using the Kirby-Bauer method and interpreted according to the CLSI M100 standard.
Findings: Out of 79 S. aureus isolates, 43 (54.4%) isolates were strong biofilm producers, 21 (26.6%) isolates were weak biofilm producers, and 15 (19%) isolates were non-adhesive. The results of real-time PCR showed that 55 (86%), 60 (93.7%), and 46 (58.2%) isolates were positive for psm A, psm B, and both genes, respectively. The results of antibiotic susceptibility testing showed that all the isolates were resistant to two or more antibiotics.
Conclusion: The high prevalence of biofilm-forming S. aureus strains in hospital environments could be a major health challenge with serious outcomes for hospitalized patients. Thus, it is necessary to disinfect hospital environments to reduce the risk of infection and spread of these microorganisms.
Volume 9, Issue 4 (winter 2020)
Abstract
Aims: Lighting cultural-historical areas is one of the factors enhancing nightlife identity and sense of place in cities. However, it should be noted that in any lighting scheme, the use of optimum light sources and the use of appropriate optical techniques can lead to higher quality, energy efficiency, tourist attraction and economic savings for the city. The purpose of the present study is to investigate the impact of modern technologies on the quality of lighting in historical and cultural areas. To achieve this goal, it is very helpful to achieve an optimal pattern of lighting using modern equipment.
Instruments & Methods: Firstly, using descriptive-analytical methods and library studies, lighting documents and successful internal and external experiences, important criteria for lighting cultural-historical areas have been extracted. These criteria are then prioritized and scored by experts. In addition, Dialux 4.13 software has been used to model the street lighting of Si-e Tir Street in Tehran, in order to measure the variables of light intensity and color temperature in different states. Finally, each of these modes was evaluated by Delphi method and in-depth interviews with experts.
Findings: The mode of use of LED lights with a color temperature of 4000K was chosen, so that the optimum brightness was higher than the background.
Conclusion: The software output also uses 250-watt mercury vapor lamps to illuminate the sidewalks and sidewalks of the street, mounted on 7-meter bases at a distance of 26 meters from each other and illuminated at a 5-degree angle to the street surface.
Volume 11, Issue 1 (10-2019)
Abstract
Abstract
The concept of life is one of the main concepts of many ancient civilizations arts, especially in Persian art and civilization. In the present article an attempt has been made to study "the concepts of symbolic and pictorial scenes of pouring win on the ground, presenting gulp and flowers in ancient Persian art, and its continuation in the paintings of Islamic period. The aim of this study is a consideration the content and the origins of one of the most popular scenes in the Islamic arts. The scenes that presented a gift such as flowers or wine to make a beautiful picture. At first glance these motifs can be thought of normal everyday life scenes. But with reviews of its Visual and mythic- religious concept changes in ancient Persian art and culture, can be provide the continuation of a symbolic and Visual archetype on the ancient and Islamic art of Persia. In the present article an attempt has been made to study with an emphasis the mythical and cultural information, Explain the concepts of pouring win on the ground, presenting gulp and flowers in ancient Persian art, Show related images, then analysis them on Islamic art, On the basis of the transmission of symbols and archetype of a culture. Based on comparative mythology, this theory can be said that pouring win on the ground, presenting gulp and flowers are common ritual archetype among the Hindu European groups. This is an issue many of the Scientists have confirmed but the interesting thing that is the key result of this article, is the continuity of meaning and symbolic picture of this pattern in the Islamic art and culture.
Volume 13, Issue 3 (5-2006)
Abstract
Persian carpet weaving is one of Iran’s most famous industries that has attracted the world’s attention to Persian arts through the centuries. What above all, have given prominence to Persian carpet as a beautiful work of art are the pattern and its composition in a two-dimensional space. The diversity of patterns, use of deep and beautiful colors, good composition, harmony of colors, delicate and poetic composition are among the most outstanding features of Persian carpet. Industrial advancement and development of transportation in the 19th century led the western explorers to travel eastward making them acquainted with the cultural heritage of these civilizations. William Morris, the leading thinker and artist of the British Arts and Crafts Movement is among the first to conduct a research on Persian carpet’s patterns and designs. In this paper, we are proposing a semiotic approach to the transaction between Persian artists who made beautiful and ever-lasting carpet designs and William Morris as a pioneer of Pre-Modern Movements in Europe, who studied and recognized the underlying principles of Persian art (mostly carpet), and applied them in a creative way to his own remarkable hand-made designs.
Volume 13, Issue 3 (July & August 2022 (Articles in English & French) 2022)
Abstract
There is dearth of research on disclosing the ethos of Appreciative Inquiry (AI)-based pedagogy application in language education settings (Johnson, 2014), especially amid the Covid-19 pandemic era. To disclose the ethos in AI-based pedagogy as an appropriate pandemic pedagogy, the present study attempts to uncover the Iranian EFL learners' narratives on their lived experiences of a pedagogical shift in an English language school in northern Iran when dealing with an online class during the pandemic. Embedded in 4-D ethos of AI-based pedagogy, namely Discovery, Dream, Design, and Destiny, this study utilizes data from observational field notes and interviews in shaping narratives. It was shown that the online language lesson agenda is a dynamic resource that emerges from content development and can be planned to confirm the learner's knowledge. More creative ways of learners' assessment are also yearned for to neutralize cheating possibilities. In addition, new modes of meaning in language education are envisaged to be designed. Learners position themselves as enriched multimodal text repertoires in a dynamic not static language community of practice. The current study has some implications for online language practice, especially in periods of crisis such as a pandemic.
Volume 13, Issue 5 (8-2013)
Abstract
Three-point bend (TPB) specimen is an important test sample in fracture study of notched components made from brittle materials like rocks and ceramics. On the other hand, the notch stress intensity factors (NSIFs) are vital parameters in brittle fracture assessment of V-notched structures. Therefore, computation of NSIFs in TPB specimens is of practical interest to engineers and researchers. Since the available methods for calculating NSIFs are often cumbersome and need complicated calculations, it is preferred to show them as a set of dimensionless parameters. In this research, by using a finite element approach called FEOD method, the stress intensity factors are determined numerically for notched TPB specimens having different geometry and loading conditions. The obtained values of NSIF are then converted to dimensionless parameters called notch shape factors YIV and are illustrated in a number of discrete figures. It is shown that each of the three parameters of: the notch opening angle, the notch length and the distance between the two supports has direct relation with YIV. The results presented in this paper can be used by designers and engineers for performing the necessary fracture experiments through the TPB specimen without needing complicated and time-consuming calculations.
Volume 14, Issue 9 (12-2014)
Abstract
The use of stop drill holes is one of the most convenient methods for reducing the stress intensity factors and crack growth rate. The efficiency of stop drill holes on the crack growth retardation depends on the amount of reduction in stress intensity factors. The curved plates are frequently used in engineering structures. Therefore, in this paper, by using the finite element method, the effects of configurations and diameters of crack flank holes on the variations of stress intensity factor are studied for a curved plate. The numerical results indicate that the location and the size of stop drill holes affect the stress intensity factors which is mainly due to their interaction with the crack tip stresses. Closer distances to the crack tip and larger diameters of the flank holes provide more reduction in the stress intensity factors. Also, the finite element results show that the use of stop drill hole method for the curved plates has the same efficiency as that of the flat plates.
Volume 16, Issue 1 (3-2016)
Abstract
Adding particles and fibers to the adhesive layer is a method suggested to improve the stress distribution and to increase the strength and toughness of adhesive joints. In this paper, the effects of adding the metal fibers and also the reduction of fiber horizontal distance on distribution of peel stress and shear stress toward longitudinal and transverse directions were studied using finite element analysis. The obtained results showed that the reduction of the horizontal distance between the metal fibers in the longitudinal direction improves the distribution of the peel stress and shear stress and leads to a significant reduction in their maximum values in the joint length with respect to the non-reinforced adhesive. Meanwhile, reduction of the horizontal distance between the metal fibers in the transverse direction first degrades the peel stress and then improves it. Despite the trend observed for the peel stress with the transverse direction, the distribution of the shear stress with reduction of the horizontal distance between the metal fibers becomes more uniform and the maximum values of shear stress regularly decreases in the joint length due to considerable load sharing of the metal fibers in the adhesive layer. In addition to the analyses carried out on the distribution of stress in the joints length, the distribution of peel stress and shear stress were also investigated in joint width, which was indicative of a significant effect of the metal fibers in the transverse configuration.
Volume 16, Issue 10 (1-2017)
Abstract
In this research, the influence of multi-walled carbon nanotubes (MWCNTs) on the fracture resistance of epoxy-based nanocomposites under out-of-plane shear (mode III) has been investigated experimentally and compared with their effect in the case of tensile (mode I) loading. Due to its wide industrial applications and low viscosity, epoxy LY-5052 has been used to manufacture the nanocomposite specimens. The MWCNT contents considered for nanocomposite samples are 0.1, 0.5 and 1.0 wt.%. Ultrasonic homogenization technique has been utilized for dispersing nano-fillers in the matrix resin. In order to measure the fracture resistance of pure epoxy and nanocomposite specimens under mode I and mode III loading conditions, a loading fixture recently developed for mixed mode I/III fracture tests has been employed. The obtained results show that in both loading conditions, increasing MWCNTs content up to 1.0 wt.% enhances the fracture resistance. However, the maximum values of mode I and mode III fracture toughness have been attained in nanocomposites containing 0.5 wt.% and 1 wt.% of MWCNT, respectively. Eventually, the observed trends in the experimental results have been discussed using the effective micro mechanisms of CNTs inside the polymer matrix.
