Showing 13 results for Ghandi
Volume 6, Issue 3 (11-2016)
Abstract
Availability is an important characteristics of the repairable machines system performance and improvement of production planning and loading operation is an important part of the mine production cycle. In this paper an approach to calculate availability of open pit mine loading system based on Markov chain theory has proposed. Markov method is based on different modes of the system and the transition from a state to another. Therefor data analysis and failure and repair rate determination are significant. To illustrate the application of model, the Mishdowan iron mine data was used. Calculation of failure and repair rate indexes and availability of loading system has been determined using Markov chain model. Related statistical tests was used detecting the failure and repair behavior of system for higher degree of accuracy.
Based on the results obtained, failure and repair rate for Newholland hydraulic excavator are 0.019 and 0.064 and for Komatsu hydraulic excavator are 0.017 and 0.047, respectively. Additionally, availability of hydraulic excavators of mine loading system is evaluated to be 93.3 percent.
Volume 10, Issue 3 (Summer 2022)
Abstract
Aims: This study aimed to explore changes in sexual life in women with genital warts.
Participants & Methods: A qualitative study was conducted in Tehran, Iran, from January 2019 to February 2020 on a purposeful sample of 14 women and 2 couples with genital warts. Data were collected through unstructured interviews and analyzed using a conventional content analysis approach.
Findings: After conducting 23 interviews with 18 participants about understanding and experiencing sexual function following genital warts, a total of 224 initial codes were extracted. The central theme obtained was: “instability in sexual function” which includes 4 main categories: "Changes in the patient and spouse desire”, “Changes in the patient and spouse arousal”, “Changes in the patient and spouse orgasm “and” dyspareunia”.
Conclusion: This study revealed the perceptions and experiences of women with genital warts about changes in their sexual life, which are often not expressed in quantitative studies. The results showed that genital warts have significant negative effects on various aspects of female sexual function. It seems that recognizing women's sexual dysfunction after getting genital warts may help health workers and women take effective and practical measures to improve their sexual function and health.
Volume 12, Issue 4 (winter 2025)
Abstract
The postmodern novels "Divorced Diaries" by Haifa Bitar and "Vanhadeh" by Simon de Beauvoir are the first-person narrators of the daily lives of two divorced women as the protagonists of the mentioned novels. The importance of this research is because the neurotic character of both novels makes it possible to look at the hero of the two novels with a psychotic perspective and to investigate Jeffrey Young's initial inconsistent schemas in their characters with a comparative method. This research is based on descriptive-analytical method. This research aims to have a concrete view of the society of Syria and France and reveal the effective factors in the formation of these schemas in the hero of two novels and scrutinize them with the example of the witness. The research results indicate that the heroines of these two novels are both abandoned by their husbands and suffer from the same primary incompatible schemas. Both protagonists of the novel suffer from various primary maladaptive schemas of dependence/incompetence, defect/shame, and abandonment/instability (abandonment), which, in the order of their origin, depend on/incompetence in them. Relying on the father in doing all the daily tasks, even doing the homework, especially at the teenage age, which is the stage of reaching independence and self-sufficiency. In addition, there is a schema of defect/shame arising from their being rejected by their spouses and their divorce by them, as well as a schema of rejection/instability caused by their shaky relationships.
Volume 14, Issue 1 (1-2011)
Abstract
Objective: Shigellosis is one of the most common causes of morbidity and mortality in children with diarrhea in developing countries. It is essential to assess the antibiotic resistance patterns of these bacteria. ipaH gene is one of the virulence factors which can be used for detection of Shigella spp.
Materials and Methods: Total of 100 isolates of Shigella were collected from different provinces of Iran. This isolates were characterized by biochemical tests and serological tests using polyclonal antisera for 4 species of S. dysenteriae, S. sonnei, S. boydii and S. flexneri. Antibiotic susceptibility assay for 14 different antibiotics was carried out using agar disc diffusion method. Presence of ipaH gene was investigated by PCR using specific primers.
Results: From the results of this study the Shigella isolates were classified as follows: 36 (%73) Shigella sonnei, 9(%18) Shigella flexneri, 3(%5) Shigella boydii, 2(%4) Shigella dysenteriae. Approximately %50 of the Shigella isolates were resistant to Tetracycline and Cotrimoxazole. Shigella sonnei showed more resistance than other serotypes against the studied antibiotics. PCR assays showed that all isolates harbored ipaH gene.
Conclusion: The results showed that prevalence of Shigella sonnei is higher than other serotypes. The isolates showed high sensitivity to third generation cephalosporines and aminoglycosides. PCR detection of ipaH gene as a reliable marker for identification of Shigella species could be recommended.
Volume 14, Issue 2 (5-2014)
Abstract
In this research, the effects of cutting parameters on material removal rate and surface roughness, are investigated. Therefore, after that the comprehensive model of low-immersion milling is developed, the optimum cutting conditions has to be found for optimizing all of them. The stability criterion is considered as the optimization constraint which is calculated by TFEA. On the other hand, instead of using explicit equation for calculating surface roughness, such as previous works, surface roughness is calculated by TFEA for all of the cases that are needed. Finally, the ability of Genetic algorithm, Particle Swarm Optimization and Imperialist Competitive Algorithm for searching optimum cutting parameters are compared and the results are reported. By comparing the results of the three algorithms it is shown that the ICA is more powerful to deal with nonlinearity aspects of the problem and to tackle sticking in local minimums. Also it is demonstrated that the convergence rate of the ICA is faster than the other two methods. Finally, experiments to confirm the changes of the objective function toward optimal point are done and error percentage of objective function at obtained optimal point compared with experimental result is determined.
Volume 15, Issue 6 (January & February 2024)
Abstract
All languages in the world use different mechanisms to create new words. compounding is a morphological process whose main function is the formation of new word-forms. In Persian, compounding is the most productive morphological process. One of the compound words is numeral ones; a numeral in the broadest sense is a word or phrase that describes a numerical quantity. The main purpose of this research is to study the compound numeral construction [Num X] in Persian within the framework of Construction Morphology (CM) to investigate its semantic variations, the most general schema and subschemas. The data analyzed in this study has been gathered from six sources: Reverse Dictionary (Zansu) (Keshani, 1993), Persian Linguistic Database (PLDB), FarsNet, Farhang-e Bozorg-e Sokhan (Anvari, 2002), Google and Persian Wikipedia. The findings of the research show that [Num X] has different meanings (functions) and thus we can consider it as a polysemous construct. Its polysemy is not explainable at the level of words, but at the level of abstract schemas; hence, it is called ‘constructional/ logical polysemy’. The results of this study indicate that ‘distinctive property of an entity related to SEM Number and X” is the prototypical meaning of [Num X] which is the most abstract correlation among meaning and form in Persian language.
1. Introduction
Traditionally, word formation consists of two processes: derivation and compounding (Booij, 2007, p.24). Greenberg (1963, p.92) says: "it is probable that no language exists without compounding, derivation, or both. A significant number of languages exist without inflection, but without compounding or derivation, probably not." Given this level of productivity, this process holds a special place in the morphology of every language and has garnered considerable attention from grammarians and linguists.
Numerous studies have addressed compounding in the Persian language, but numeral compounds have not received much attention. In this study, by examining these compounds and providing schemas and sub-schemas for Persian numeral compounds, and analyzing them within the framework of Construction Morphology, we will map the hierarchical relationship of schemas and sub-schemas of numeral compound constructions [Num X]. This will help us to derive a potential model for classifying these constructions within the mental lexicon of Persian speakers.
Research Question(s)
The main question of the present study is how, based on the theory of Construction Morphology (Booij, 2010), can we consider the numeral compounds as constructions and analyze the semantic variations in the constructions?
2. Literature Review
The theoretical framework of this study follows Construction Morphology (CM) (Booij 2010).
The aim of the theory is a better understanding of the grammar of words, as well as the relation between syntax, morphology, and the lexicon. In the framework the notion ‘construction’, a pairing of form and meaning, as developed in the theory of Construction Grammar, is essential for an insightful account of the properties of complex words. Morphological patterns can be represented as constructional schemas that express generalizations about sets of existing complex words and word forms, and provide the recipes for coining new (forms of) words.
One of the issues discussed in this theory is compounding. According to Booij's definition (2007, p.75) compound word is as a combination of two or more words. He divided compounds in to five kinds and argued that some compounds what have been called exocentric compounds or bahuvrihi compounds are a specific semantic category of endocentric compounds based on metonymic language use. One category of compounds is numerical compounds, which are combinations of a number and a noun. These compounds are also metonymical endocentric compounds and refer to someone or something characterized by a specific and prominent feature. The present study follows the numeral compound construction; that is [Num X], in the framework of Construction Morphology to investigate its semantic variations, the most general schema and subschemas.
3. Methodology
In this study, we analyzed the nonverbal adjectival compound constructions, following the construction [Num X] in Persian and illustrated the schemas and sub-schemas of the constructions. In all the data of this research, numbers function as adjectives and are used for an entity description. The data for this research were extracted from the following sources: Reverse Dictionary (Zansu) (Keshani, 1993), Persian Linguistic Database (PLDB), FarsNet, Farhang-e Bozorg-e Sokhan (Anvari, 2002), Google and Persian Wikipedia. Since numbers are infinite, constructions formed with numbers are also potentially infinite. For example, the word "seven hundred" in the compound ‘seven hundred-legged’, although it may not exist in the real world, can be constructed based on the infinite nature of numbers and a schematic perspective.
4. Result
The present study aimed to examine the semantic variations of the nonverbal adjectival compound constructions to determine the general constructional schema and sub-schemas governing the [[Num] [X]] construction within the framework of construction morphology. The issue observed after the semantic classification of the compounds was the semantic variations, particularly in numerals constructed with the numbers "one" and "two." Analyses showed that the numbers "one" and "two" in some numeral compounds do not appear with their literal meaning (mathematical number), but rather acquire a metonymical meaning. These two numbers, appearing with a metonymic meaning in combinations with the meaning of the constituent X (which in some cases is conceptualized metaphorically) and the construction, resulting in a new meaning formed by the [[Num] [X]] construction.
It was also noted that this semantic variation and metaphorical and metonymic mechanisms are not present in numbers larger than "two." However, all compounds constructed with numbers share two concepts: "attribute" and "possession." Given that all countable nouns can be enumerated with the number one and other counted numbers and distinguished from each other, the [[number] [X]] construction is productive and potentially infinite.
Furthermore, it was determined that semantic variations and the formation of numeral compounds constructed with the numbers "one" and "two" can be attributed to a polysemic approach at the level of abstract schemas. Additionally, it was revealed that there is a general constructional schema and five sub-schemas for adjectival compounds with the number "one" and a general constructional schema and two sub-schemas for the number "two," corresponding to the construction [[one] [X]] and [[two] [X]]. Moreover, the primary concept of " distinctive property of an entity related to SEM Number and X” is the prototypical meaning derivable from the [[Num [X]] constructions. Finally, the findings of this study indicated that the main function of this construction is to distinguish one entity from another related to the meaning of the number and X.
Volume 15, Issue 8 (10-2015)
Abstract
In this paper, by expanding Muskhelishvili’s stress functions and with use of Schwarz’s alternating method, the stress distribution in a plate with two quasi-rectangular cut outs has been studied. Muskhelishvili represented the mentioned stress functions for studying the stress distribution in an isotropic plate with a circular or an elliptical cut out. In order to expand the Muskhelishvili’s analytical solution for deriving the stress functions related to quasi-rectangular cut outs, a conformal mapping function has been used. This conformal mapping transformed the area external of the quasi-rectangular cut out into the area outside the unit circle. Considering Schwarz’s alternating method, for calculating the stress distribution around two cut outs, complex series with unknown coefficients have been used. In this study, the effect of different parameters such as the location of the cut outs relative to each other, bluntness and aspect ratio of cut out sides on stress concentration factor can be investigated. The finite element method has been used to verify the accuracy of semi-analytical results. Comparison of two methods demonstrates the precision of obtained semi-analytical solution and indicates that it can be used for computing stress distribution in plates with two rectangular cut outs. Analysis of the proposed solution shows that the mentioned parameters have a significant effect on stress distribution and stress concentration factor decreases noticeably with selection of appropriate values of these parameters.
Volume 18, Issue 120 (February 2021)
Abstract
Oxidation of fats and oils leads to the production of harmful substances that endanger the health of the consumer. In the present study, the antioxidant activity of mountain watermelon fruit extract was investigated. Extraction was performed by ultrasonic extraction with the help of solvent (ethanol). In this study, the extraction process was performed by ultrasound technology with 3 levels of 20 tests, by the response level method. The results of statistical analysis were reported in optimal conditions, time of 18.62 minutes, sound intensity of 84.56 khz and temperature of 49.52 ° C and extraction efficiency of 34.456 8456%. Under these optimal conditions, the amount of phenolic compounds and free radical scavenging power of the extracts at concentrations (100, 200, 200, 400, 800 ppm) were measured by Folin and DPPH tests, and then the extract was concentrated at concentrations (100, 200, 400, 800, 800 ppm). Samples of soybean oil without added antioxidants and parameters of peroxide index, thiobarbiotic acid index (TBA) were compared with samples of soybean oil containing 200 ppm synthetic antioxidants (BHT) and control sample. The results showed that with increasing the concentration of mountain watermelon extract in soybean oil from 800 to 100 ppm, the index of peroxide, thiobarbiotic acid index (TBA) decreases and the concentration of 800 ppm of the extract due to higher levels of antioxidant compounds is more effective in inhibiting free radicals.
Volume 18, Issue 121 (March 2022)
Abstract
The tasty yogurt is dairy formulation for which fruits and vegetables and various extracts are used in preparation process. In the present study, Ginger extract (Zingiber Officinale) was used in yogurt formulation in different quantities (2, 4, 6 and 8%) and inhibitory function of free radicals, phenol compounds as well as qualitative tests of product (pH, acidity, watering amount and viscosity) were evaluated after storing yogurt for 1, 10 and 20 days. The results illustrated that ginger extract caused water-soluble phenol compounds and their antioxidant function to become more than in simple yogurt during 10 days storage so that after 10 days the highest antioxidant activity belonged to yogurt including 6 and 8% of ginger extract. The lowest watering amount (water formation) was observed in yogurt including 8% ginger extract and it significantly differed from other samples (P>0.05). The pH loss increased further in yogurt with rising percentage of extract and also increasing storage period. Moreover, adding ginger extract to yogurt reduced viscosity, but there was no significant impact on acidity level of product during storage time (P<0.05).
Volume 19, Issue 78 (12-2022)
Abstract
Identity is an essential concept in the field of cultural and human science studies; especially the group identity with its branches such as national identity, social identity and cultural identity reflects in all art texts. Cinema is an expression mean and appears the identity conceptions in its codes consciously or unconsciously. As a part of a major research on Bahram Beizaei's movies and screenplays, this research analyzes the movie "Bashu, The Little Stranger" with narratology approach by this presupposition that it represents the identity elements in its narrative discourse. The research method is descriptive, and its theoretical framework is Roland Barthes' findings in the field of structure of narration. He defines three levels of function, action and narration for structure of narration as the first level is critical. Analysis of functions will be possible only by understanding the reason of five heremeneutic, proairetic, semantic, symbolic and cultural codes. In narratology representation of movie "Bashu, The Little Stranger" in order to understand the meaning of Identity, it was concluded that the semantic and symbolic codes have the highest reasoning, and iterative and focal reasoning of movie is the unity of social identities under the shadow of national identity.
Volume 21, Issue 150 (August 2024)
Abstract
Escherichia coli and Staphylococcus aureus are pathogens that have the ability to form biofilms and cause disease in food products. Due to the fact that the enterotoxins produced by these two pathogens remain in a wide range of temperature, pH and saline conditions, they cause severe infections in humans. Melittin is a natural peptide derived from bee venom that can show its antimicrobial and anti-biofilm potential through disrupting the membrane of bacterial cells. For this purpose, in this study, the antimicrobial effect of this peptide on Gram positive and negative bacteria was investigated and its minimum inhibitory concentration (MIC) was determined as 100 µg/mL and 300 µg/mL, respectively. Also, the scanning electron microscope images confirmed the antimicrobial effect of the peptide on these two bacteria. Peptide melittin caused wrinkling, deformation and creation of holes in the cell membrane of treated bacteria, compared to the control sample. On the other hand, the results of the biofilm inhibition test showed that the addition of the peptide at a concentration of 2MIC completely prevented the biofilm formation of S. aureus prevented, while this value was equal to 91.00 ± 2.82 in E. coli bacteria. Also, the increase in peptide concentration caused an increase in the destruction of adult biofilms of both bacteria. On the other hand, this peptide decreased the invasion and adhesion of these two bacteria to HT-29 and Caco-2 cells by reducing the mobility of pathogens. Therefore, according to the obtained results, melittin peptide can be a suitable alternative to chemical disinfectants that are harmful to the environment.
Volume 21, Issue 153 (November 2024)
Abstract
Oxidation of fats in food greatly reduces their shelf life and causes food of unacceptable quality to be presented to the customer. In this regard, this research was conducted with the aim of increasing the oxidative stability of sesame oil with nanoliposomes containing the antioxidant extract of yarrow plant. In this study, 6 concentrations of nanoliposomes containing yarrow plant extract (0, 50, 100, 200, 500 and 1000 ppm) were used in sesame oil, and tests such as acidity, peroxide, thiobarbituric acid index, conjugate diene were performed on those oils. And after finding the best concentration of nanoliposome containing yarrow extract, this sample was compared with the sample containing the same amount of free yarrow extract and also the sample with 200 ppm BHT after 7 days of storage at 63 degrees Celsius. The results showed that with increasing storage time, acidity level, thiobarbituric acid index and conjugate diene increased, but with the increase of nanoliposome containing 500 ppm of yarrow extract, these characteristics decreased and then increased. Unlike other characteristics, the peroxide content of the samples decreased from the 5th day onwards. On the other hand, it was found that the sample containing 500 ppm of free yarrow extract had the highest level of acidity, peroxide, thiobarbituric acid index and conjugate diene. The highest oxidative stability (14.21 hours) belonged to the oil with nanoliposome containing 500 ppm of yarrow extract. The dominant fatty acid in sesame oil containing nanoliposome as well as control was linoleic acid, and the use of antioxidants did not significantly change the fatty acid profile of sesame oil. Finally, it can be stated that the use of nanoliposome containing yarrow plant extract is a suitable alternative for synthetic antioxidants available in the market.
Volume 25, Issue 4 (Winter 2021)
Abstract
The existence of a diverse range of hazards and crisis centers around the border cities represents the use of different planning approaches to resilience and reduce the damage caused by crises (both natural and abnormal) in these cities. Border cities are one of the most sensitive areas that can be vulnerable to the dangers if they are not prepared to deal with and are not properly equipped. In border cities, due to the special strategic and border position, special socio-cultural topography, special economic-political conditions, vulnerabilities and threats, special conditions in terms of risk prevail; Considering the strategic position of these areas and considering the conceptual territory, content in this research, the most important issues in the study of the border cities of Abadan and Khorramshahr in geo-strategic, geo-economics, geo-culture, physical and institutional dimensions are: border geostrategic position, heterogeneous socio-cultural structure, specific geographical and environmental conditions, environmental pollutants (dust and natural resources pollution), history of endangerment and political, ethnic and religious tensions in border cities and special economic, physical and social conditions resulting from the occurrence of the imposed war. According to the proposed cases, the scope of the present study, specifically the border cities of Abadan and Khorramshahr as the largest border cities of Khuzestan province, with an active economic field on a regional and national scale, studies the specific social and cultural context, the border-water location and the experience of the imposed war. What is needed is a revision of traditional planning approaches to urban hazards management and the use of new tools in planning (compilation of resilience scenarios). In this study, foresight and hazards management based on urban resilience scenarios are considered.
Methodology
The present study is "applied-theoretical" in terms of purpose, and based on the nature and method, it is "descriptive-analytical". Research Methods according to the purpose of the research, is a combination of quantitative-survey and qualitative methods. Data collection tools and information in this research have been done by studying library-documentary sources, field surveys (survey, obtaining expert opinions) and referring to relevant organizations. The statistical population of the present study is academic experts, experts and institutional-organizational managers who have sufficient knowledge and experience in the field of urban resilience and the field of study. These experts were selected and questioned based on the method of "purposive sampling (expert samples) and chain-referral ". For structural analysis of urban resilience drives based on the ability of experts to respond and the complexity of methods, steps and conditions of Delphi technique, a total of (45) academic experts, managers and institutional-organizational experts were selected as the sample. The indicators and drivers of this research are the selected dimensions of urban resilience, including social, economic, physical-infrastructural, ecological and hazards dimensions. In this regard, urban resilience drivers were identified according to the opinion of experts and expert opinions (Delphi technique) and then, these factors were prioritized based on the degree of importance and uncertainty, and the most key factors were identified using the cross-impact balance analysis method and "micmac" software. For scenario writing and questionnaire analysis, cross-impact balance method and "ScenarioWizard" software were used that finally with the opinion of experts, favorable and compatible scenarios of resilience of the studied border cities were developed.
Discussion of Results
In line with the main purpose of the present study, to extract the key drivers of resilience, the cross-impact analysis method was used to identify the impact of these drivers. According to analysis performed, among the 46 factors examined (by analyzing the direct and indirect effects and calculating the displacement coefficient of each of the variables in different conditions), (18) agents were extracted and selected as key drivers of resilience in the border cities of Abadan and Khorramshahr. For the sake of scenario compilation, based on (18) selected key drivers and effective on urban resilience, possible situations of urban resilience were formulated. In order to formulate possible situations through surveys and interviews with experts, a scenario basket was prepared for (18) key factors; based on the analysis and possible situations facing the resilience of the studied cities, a total of (54) different situations were plotted for (18) key drivers influencing resilience. Considering the size of the matrix and its dimensions with size (54 × 54), with the help of scenario software and based on the questionnaire data, combined scenarios that included all possible situations were analyzed, the output of which was "521 possible scenarios", "14 high compatibility scenarios" and "3 strong scenarios". Accordingly, three scenarios with very high scores were identified as strong (probable) scenarios in the resilience of the studied cities that among them, one scenario shows favorable conditions and the other two scenarios show critical conditions. It was also detected for believable scenarios (with high compatibility) (14 scenarios). Also (521) weak (possible) scenarios were identified that due to the large number of them, addressing this number of scenarios is not the purpose of this study.
Conclusion
Findings related to the analysis of urban resilience scenarios showed that most of the scenarios are in static situations (continuation of the existing trend in resilience of Abadan and Khorramshahr border cities) and critical. Out of the total number of possible scenarios, three scenarios were identified as "strong resilience scenarios" based on the total value of the adjustment value and the total impact score index. Among the strong scenarios, one scenario has favorable situations and the other two scenarios represent critical situations. In this regard, considering the prevailing situation of Abadan and Khorramshahr urban resilience drives, the best scenario is to select the first scenario drives, otherwise, the conditions governing the second and third scenarios and the continuation of the status quo will be the scenarios governing urban resilience drives. In general, it can be said that urban resilience based on scenario writing is a systematic and future-oriented approach to managing the existing and upcoming risks and challenge by creating integration and effective interaction between the dimensions of resilience, key drivers, considering resilience priorities and taking steps based on the presentation of strategies for turning unfavorable situations into favorable, on a local scale, regional and cross-border in the border cities of Abadan and Khorramshahr can be presented.
Keywords: Cross-impact balance analysis, Urban Resilience, Scenario Compilation, boundary cities, Hazards, Abadan and Khorramshahr.