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Showing 11 results for Vatankhah


Volume 0, Issue 0 (Articles accepted at the time of publication 2024)
Abstract

In this study, 30 mental states were suggested to 50 theatre actors. They designed a specific physical form for each mental state. In this process, 2000 images from actors’ gestures were collected. Images was surveyed by 321 accidental audiences; and among all images, images achieving the highest rate were selected. Reliability and validity of selected images were evaluated by a software designing for mind-reading's test though body. This study achieved its results mentioned below through preparation, design, implementation, analysis, record of results of a mind-reading’s test.
According to statistical results, the body has an ability to convey the mental state. We can figure out individuals’ mental states through body forms. Based on Baron-Cohen’s study, 30 body forms were determined. The relation between mind-reading through body and eyes was analyzed. Selected images for designing a mind-reading’s test through body were identified, and its reliability and validity were confirmed.
In this study, the first archive of images representing mental states through actors’ bodies has been designed and prepared. In comparison to men, women have a better function in understanding of mental states. Furthermore, bodies can represent mental states better than eyes.

Volume 8, Issue 3 (6-2019)
Abstract

Five fungicides, with active ingredients azoxystrobin, imazalil, thiabendazole, azoxystrobin + difenoconazole and fludioxonil + difenoconazole, were tested against two isolates of Fusarium solani and two isolates of F. oxysporum, causing potato dry rot in Mashhad region. PDA media amended with the fungicides significantly inhibited the mycelia growth of all Fusarium isolates incubated at 25 °C for 7 days; however only Imazalil and Thiabendazole completely stopped the mycelia growth of all fungal isolates even at their lower concentration (40 and 5ppm respectively). The mean penetration of F. solani FPO-67 and F. oxysporum FPO-39, the more virulent of the four isolates, after 21 days of incubation at 25-27 °C indicated that imazalil and thiabendazole at concentrations of 1.5 and 2/1000, completely inhibited the penetration of F. oxysporum FPO-39 into potato tubers, but in the case of F. solani FPO-67 all treatments (1, 1.5 and 2/1000) significantly reduced the development of dry rot compared to untreated control. In natural condition, tuber treatment with Imazalil and Thiabendazole (2/1000), prior storage, reduced F. solani FPO-67 development by 68 and 71.69% respectively. According to the results, these fungicides could play a role in integrated pest management against tuber-borne fungal pathogens.
 
 

Volume 11, Issue 1 (1-2022)
Abstract

The current study evaluated Pseudomonas fluorescens VUPf5 and three isolates of Bacillus subtilis (GB32, GB12, and VRU1) for induction of resistance against Cucumber mosaic virus (CMV) in cucumber Cucumis sativus L. (cultivar Sultan) plants. Seed treatment with plant growth-promoting rhizobacteria (PGPR) strains significantly reduced the number of symptomatic plants when CMV was mechanically inoculated. Serological analysis using double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) also showed a significant reduction in the CMV accumulation in plants treated with PGPR strains. In every treatment, growth indices, leaf chlorophyll content, leaf carotenoid content, leaf, and root Iron, Zinc, Copper, and Manganese concentration of virus-infected plants were significantly increased. The highest reduction in CMV concentration was observed in plants treated with VRU1. The maximum chlorophyll concentration, leaf Iron, copper, and manganese were observed in plants treated with GB32.
Nevertheless, the highest carotenoid content was measured in the VUPf5 treatment. In the case of growth indices, the best results were obtained by VUPf5 compared to untreated control. In addition, the production of lipase, siderophore, protease, cellulase, HCN, auxin, and phosphate carbonate was determined under in vitro conditions. All four strains were positive for siderophore and auxin production. These results suggest that P. fluorescens and B. subtilis should be further evaluated for their potential to contribute to CMV management under in vivo and in situ conditions.
 


Volume 12, Issue 2 (June & July 2021 (Articles in Persian) 2021)
Abstract

The antiquity of stylistic studies in Iran is seriously owed as an independent field due to the persistent and research efforts of the Malek osh-Sho'arā Bahar. By studying the research literature, we find that Bahar's Stylistics has not been properly studied and his theoretical stylistic approach has not been discovered and extracted yet. Therefore, the aim of the authors was to acquire the theory or theoretical approach of Bahar, and discover and recognize the variables and components of the stylistic theory of him, categorization, hypothesized, and presenting a model based on it by the method and technique of qualitative-deep content analysis. According to the purpose, the works of the Malek osh-Sho'arā Bahar in the field of stylistics were studied based on purposeful sampling and theoretical saturation criteria. From the content of these works by deleting , adding,  modifying, and summarizing, 409 basic codes were obtained. Finally, during the three coding steps, a model of code was extracted that represents the two blocks "texture and context", and "stylistics"; It also shows the main hypothesis of how “texture and context" affect "style". The findings of this study showed that according to Bahar's view, "texture and context" has a significant impact on "style" and "stylistics", that this connection and influence has been neglected. Finally, the variables and concepts of his approach, as well as the relationships of these variables with each other are discovered and eventually lead to modeling, and reinforcing the assumption that he was a connoisseur in this field.
 
  1.  Introduction
Contemporary Iranian literature and research should be a logical and rational continuation of our literary, cultural, and philosophical traditions. Therefore, it is necessary to recognize and study the theories, theoretical approaches, and insights into the great and pioneers of literary research in various fields. Therefore, the aim of the authors about style was to acquire the theory or theoretical approach of Malek osh-Sho'arā Bahar, the prominent feature of modern Iranian stylistics. The antiquity of stylistic studies in Iran is seriously owed as an independent field due to the persistent and research efforts of the Malek osh-Sho'arā Bahar. Of course, in the biographies, texts of the past, and the poetry of the poets, we encounter synonymous and parallel words of "style", but this literature does not fully present the features and concepts hidden in the word "style". By studying the research literature, we find that Malek osh-Sho'arā Bahar's Stylistics has not been properly studied and his theoretical stylistic approach has not been discovered and extracted yet.
Objective
 The aim of this study is to discover and recognize the variables and components of the stylistic theory of the Malek osh-Sho'arā Bahar in order to categorize, hypothesize, and present a model based on it. This study also proposes the method of qualitative content analysis in literary studies, especially stylistic studies, in order to better understand the views, background of thought, as well as the methodology of Persian language and literature.
Research Question(s)
  • Is it possible to achieve his theoretical approach to style by analyzing the qualitative content of his works?
  • Is it possible to find a model that supports theories of style in Persian to compensates for the theoretical deficit and poverty of the research in this field?
  • Can the result of this research and related researches lead to a new method by scientific and research solution in literature?
 
  1.  Literature Review
Research in the field of stylistics of Malek osh-Sho'arā Bahar is either mixed with other literary techniques such as literary criticism, rhetoric and the history of literature or they do not match the standards of today's research. These studies have not yet introduced, defined and analyzed Bahar's theoretical approach to stylistics, and they have only referred to the whole book of Stylistics or without using a qualitative or even quantitative method, they have talked about only a few stylistic components. In this respect , it should refer to the article entitled "Style Theory in Iran" (2011) that only a limited part of it, is partially related to the subject of the present study. In this article, the author has tried to explain and critique the concept of style from the point of view of Iranian stylists. This brief analysis shows that the author has not made a qualitative or even quantitative analysis of Bahar's works on stylistics. Therefore, it cannot be expected that this article will fully express Bahar's theoretical approach to style. Other studies have not been written exactly in this field with the method of qualitative content analysis, and what has been written has not been done by the method of qualitative content analysis; articles such as “Stylistic of Maghamat-e Hamedani & Hariri Based on Buziman's Statistical Stylistics”(2015) and “Statistical Stylistics Mechanisms in Evaluation of Style”(2018) have used quantitative, descriptive and statistical methods for stylistics of texts, which is not the subject of discussion and opinion of this paper.
  1.  Methodology
After studying and reflecting on the methodological issues of language and literature, the authors came to the conclusion that description and counting frequency do not lead to accurate results, rather, one should seek help from the text itself to obtain categories and components of macro-concepts, including "style" and "stylistic approach". For this reason, the method and technique of qualitative-deep content analysis were chosen, which has not been used in text analysis, especially literary research. For this purpose, MAXQDA and SPSS content analysis software were used.
 
  1.  Conclusion
According to the purpose and method of research, the works of the Malek osh-Sho'arā Bahar in the field of stylistics were studied based on purposeful sampling and theoretical saturation criteria. 409 basic codes were obtained from the content of these works, by deletion, addition, modification, and summarization. Finally, during the three coding steps, a model of code was extracted that represents the two blocks "texture and context", and "stylistics"; It also shows the main hypothesis of how “texture and context" affect "style". The findings of this study showed that according to Bahar's view, "texture and context" has a significant impact on "style" and "stylistics" in Iran, that this connection and influence has been neglected or not explained logically and accurately in stylistic research so far. Finally, the variables and concepts of the theoretical stylistic approach of the Malek osh-Sho'arā Bahar, as well as the relationships of these variables with each other are discovered and eventually lead to modeling, and reinforcing the assumption that he was an expert in this field.

Volume 15, Issue 6 (11-2013)
Abstract

The data set employed in this study was comprised of a number of 6,800 records of lamb’s longevity and their survival rate, collected from 1989 through 2009, from the Lori-Bakhtiari experimental flock at the Shooli Station in Shahrekord, Iran. The data were analyzed using linear models and proportional hazard models with Weibull function. These models included fixed factors and direct additive genetic, maternal additive genetic, maternal common environmental and residual random effects. Genetic parameters were estimated using Restricted Maximum Likelihood (REML) procedure fitting a sire model as well as animal models including different combinations of direct and maternal effects. Estimates of direct heritabilities of longevity and survival rate from different linear models were low (0.01 to 0.09). The maternal heritability ranged from 0.00 to 0.04, and decreaced with increase in the age of lambs. The estimates of heritability in logarithmic scale, original scale and effective heritability obtained from the sire and animal models with Weibull function were medium to high (0.08 to 0.55) and were higher than those estimated through different linear models. The maternal heritability estimated through Weibull models decreased with the age of lambs (0.25 to 0.01). These results indicated that the accuracy of the Estimated Breeding Values (EBV) of lambs’ survival rate from birth up to yearling age, using linear animal models vs. proportional hazard models, would be low vs. medium to high, respectively. Both animal and maternal genetic effects should be considered in the models for improving the survival rate up to 4 months of ages.

Volume 16, Issue 1 (3-2016)
Abstract

High blood glucose levels in the body named diabetes can increase damage in kidneys, eyes, heart and etc. In this investigation, a novel TS fuzzy static output feedback control structure is proposed to regulate the blood glucose level in the pre-defined desired values for type 1 diabetes using exogenous intra-venous insulin delivery rate. To this end, a nonlinear delay differential equation framework is considered to model the blood glucose/insulin endocrine metabolic regulatory system. The governing equations of the blood glucose/insulin model are approximated by a TS fuzzy model and then the proposed static output feedback controller is designed for this TS model.
Behzad Saeedi, Ramin Vatankhah,
Volume 17, Issue 12 (2-2018)
Abstract

In this study, nonlinear behavior of an atomic force microscopes (AFM) immersed in acetone, water, carbon tetrachloride (CCl4), and 1-butanol is investigated using non-classical strain gradient theory. In this theory, the size effect of system is taking into account by means of material length scale parameter. The nonlinear behavior of the AFM is due to the nonlinearity of the AFM tip–sample interaction caused by the Van der Waals attraction/repulsion force. Behavior of micro beam immersed in liquid is completely different with its behavior in air and vacuum due to the existence of hydrodynamic force. The Resonant frequencies, mode shapes, governing nonlinear partial and ordinary differential equations (PDE and ODE) of motion, stability analysis, boundary conditions, potential function and phase-plane of the system are obtained analytically in the present study. Furthermore, the results are compared with the one obtained by the modified couple stress theory. For this purpose, the AFM and the probe at the free end of micro beam are modeled as a lumped mass. The fixed end of micro beam is excited by piezoelectric element. The nonlinear PDE of motion is derived based on Euler-Bernoulli theory by employing the Hamilton principle. The Galerkin method is utilized to gain the governing nonlinear ODE of motion and the obtained ODE is analytically solved by means of perturbation techniques.

Volume 18, Issue 1 (1-2016)
Abstract

Semi-rigid aluminum containers are being used widely in food industries. They have wrinkle shaped walls for strengthening their physical structure. The objective of this study was to assess the effect of wrinkled parts on the heat transfer and temperature distribution of the containers by Computational Fluid Dynamics (CFD) analysis. Therefore, a precise designed geometry of the wrinkled walls container was compared to a straight one. The analysis was carried out based on the physical properties of a carrot-orange soup. The velocity vectors showed a strong circulation towards the core. The Slowest Heating Zone (SHZ) locations were the same for wrinkled and simplified containers. Average temperature of the symmetric plane and the coldest point of SHZ showed less than 1% difference. The lethality imposed to the SHZ in the wrinkled wall container was about 0.4% more than the straight one. The simulation results revealed that wrinkled walls do not play an important role in increasing heat transfer and as a result, such geometries could be simplified while modeling.
B. Saeedi, R. Vatankhah,
Volume 19, Issue 6 (June 2019)
Abstract

In this article, the sensitivity and resonant frequency of the atomic force microscope made of functionally graded materials is investigated by couple stress theory (MCST). In MCST, the size effect of the system is taking into account by means of the material length scale parameter. is made of a mixture of metal and ceramic with properties varying through the thickness following a simple In this work, due to the kinematic energy and potential energy of , the governing equations of motion and corresponding boundary conditions are derived on the basis of Hamilton principle by considering Euler-Bernoulli beam theory. Based on the results, it is clear that when the contact stiffness increases, the sensitivity of the system decreases, and resonant frequency increases. Moreover, when the thickness comes approximately close to material length scale parameter, the difference between MCST and classical continuum mechanic becomes significant. Furthermore, in low contact stiffness, increasing the power reduces the sensitivity of , while in high contact stiffness, increasing the power  increases the sensitivity of the system. Results also show that at each value of contact stiffness, as ceramic volume fraction increases the resonant frequency will be increased, too.
 

P. Khalili, S. Zolatash, R. Vatankhah,
Volume 19, Issue 6 (June 2019)
Abstract

Different strategies are studied to control chemotherapy delivery in cancerous tumors. The main aim of control is to reduce cancer cells immediately and, at the same time, it is the least harm to the healthy tissue of the body. Besides, at the end of treatment, the amount of drug remaining in the patient's body should be as low as possible. Various control algorithms are applied dynamic models with different orders. In this paper, a model for cancer with five ordinary differential equations by considering normal, endothelial and cancer cells, and the amount of two chemotherapy drugs and anti-angiogenic residues in the body as state space variables and the rate of injection of as a control After discussing the mathematical model of the system, the system is controlled by defining the rules along with and by one of the control signals (rate of chemotherapy drug). This means that the rate of normal and cancerous counts as the input of the fuzzy controller and the amount of chemotherapy drug signal is the output. The simulation results show that in the last days of treatment, cancer cells have a downward trend, and normal and endothelial cells also tend to the healthy state. The solutions of the fuzzy controller are compared with the uncontrolled mode as well as the available experimental data. The results indicate that the system has met the permissible limits, which indicates the validity of the answer from the fuzzy controller.


Volume 21, Issue 5 (9-2019)
Abstract

In this study, the antagonistic activity of 1,000 bacterial isolates from different areas of Iran and two isolates of Pseudomonas fluorescens: CHA0 and UTPf5 were individually assayed against two isolates of Fusarium solani and two isolates of F. oxysporum that cause potato dry rot in Mashhad, Iran. Using in vitro dual culture plate technique, most of the tested isolates significantly reduced mycelia growth of Fusarium spp. on PDA after 7 days of incubation at 25oC, compared to the untreated control. Thirty bacteria isolates with the most inhibition and P. fluorescens CHA0 were selected for experiments on potato tubers. All isolates were tested on tuber of potato cultivar Agria under in vivo conditions. There was no significant difference between rot diameter by P. fluorescens CHA0 and the infected control, but other isolates reduced dry rot development after 21 days of incubation at 25-27oC, as compared to the untreated control. However, three isolates, namely, VUPf40, VUPf44, and VUPf506 that belong to the P. fluorescens species were the most effective. Talc-based formulation of these three effective bacteria and P. fluorescens CHA0 were assessed for their in situ efficacy against potato dry rot development, caused by F. solani FPO67, on treated tubers compared to the control. The formulation of these bacteria significantly decreased dry rot development, but only P. fluorescens VUPf506, with 79.8% reduction of fungi development, and 18.57% prevalence, was the most effective in reduction of potato dry rot in natural conditions. Based on these results, P. fluorescens VUPf506 can be considered as a promising alternative to chemical fungicides.
 

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