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Showing 30 results for Abasi


Volume 3, Issue 1 (No.1 (Tome 5)- 2015)
Abstract

The present article is an attempt for a comparative reading of Marsiaee Baraye Zhale va Ghatelash By "Abutorab Khosravi", an Iranian contemporary author, and Daroonmaye Khaen va Ghahraman by Jorge Luis Borges, Argentinean author, poet and contemporary scholar, based on the revolutionary theories of Post-modernism, which is one of the most significant theories of the contemporary era. This research, by using comparative method based on the theories of Post-modernism and analyzing the evidence, attempts to prove the hypothesis that the commonality between Daroonmaye Khaen va Ghahraman and Marsiaee Baraye Zhale va Ghatelash that in some cases have got imitating nature is not accidental. This reflects the influence of Daroonmaye Khaen va Ghahraman in creating Marsiaee Baraye Zhale va Ghatelash. Using Post-modern approach, similar plot, same narrative style, and common symbols are some of the features that Marsiaee Baraye Zhale va Ghatelash shares in common with Daroonmaye Khaen va Ghahraman. The main purpose of this essay is investigation and analysis of these common features in order to demonstrate the similarities of these two texts.  

Volume 4, Issue 3 (9-2015)
Abstract

Stem rust caused by Puccinia graminis f. sp. tritici (Pgt) is one of the destructive diseases of wheat in the world. The fungal pathogen can infect 365 different grass and more than 70 Berberis species. DNA sequences for the ribosomal RNA internal transcribed spacer (ITS) have proven suitable to explore relationships at the species and subspecies levels. An isolate of Pgt which was collected from Iran and designated as TTSSK was used in this study. Three samples of the isolate were used. ITS region of the samples was amplified and sequenced. Consensus tree based on Maximum Parsimony clustering method was produced by Mega 6.0. Iranian isolate of TTSSK was placed in a clade with P. graminis which was isolated from Berberis sp. and Pgt isolate from Tajikistan. The results showed that more than one conserved genomic regions would be informative to identify phylogenetic relationship of Iranian Pgt isolates and samples from different parts of the world. Complementary studies with more sequence data from other genome loci are in progress.

Volume 4, Issue 4 (Fall 2024)
Abstract

Kitab al-Alal explains the principles and first causes of things and discusses God. The issue of this article is the ontological position of intelligence in Kitab al-Alal. The question is, what is the ontological position of intelligence in Kitab al-Alal, and how can it be explained? Is it possible to assign the position of teleology to the perfection and happiness of man in the Book of Causes? In terms of existence, intelligence is the first creature and the closest being to the first cause, and it is in the second place after the first cause. The ontological effectiveness of intelligence is measured in two ways: planning, ruling, and creating. The act of intellection is the act of creation. In this article, to explain this issue and answer the questions descriptively and analytically, we will explain and analyze the chapters related to intelligence.
 

Volume 4, Issue 9 (7-2016)
Abstract

The representation of kinship relationships in Persian proverbs has been studied in this research. Method of the research is descriptive-analytic and during that some proverbs were extracted from the Great Dictionary of Persian Proverbs and those proverbs which were from non-Persian languages and dialects were deleted. Finally, 3332 Persian proverbs relevant to kinship relationships have been received. The proverbs were firstly classified based on kinship mentioned on them and abundance of the proverbs of each kinship received. Then based on Murdock Theory, kinfolks were classified and compared according to the kind of kinship, marriage kinship, blood or half-blood kinship, the degree of kinship, first, second and third degree and far kinship. Gender, generation and decent of kinfolk, gender of self and kind of family were also considered and were set as the basis for comparison of the mentioned kinship in the proverbs. Those proverbs related to the woman (as the wife) are more than the other kinfolks, while those proverbs related to marriage kinship are more than blood and half-blood kinship. After the woman, father has the second place and the child has the third one. Female kinfolks were mentioned more than male kinfolks in the proverbs, but at the same time, the abundance of those proverbs relevant to men kinfolks are more than women kinfolks.

Volume 5, Issue 2 (6-2015)
Abstract

Architectural Survey in recent decades shows that the modern architecture has not been considered compatible with climatic conditions and it not only causes Environmental pollution but also increases cooling and heating costs. Nowadays architects are looking for appropriate solutions to design buildings that can be in harmony with their environment and climate. As there are different seasons and days in each climate, so designing building system that can vary with ambient conditions seems necessary. Since the sunlight is one of the most important and effective climate factors in indoor conditions, in order to control of heat and light in the window, author got the basic idea from the shadow of a cup of tea. If the colored liquid is injected between double glazed windows, light passing through the window will reduce a lot. Variable Building Layers System (V.B.L.S) is an innovative design that has been patented by the author and can control heat transfer in buildings and improve thermal comfort. The system has been designed based on the basic idea after some trial and error and includes three main components: transparent layers, color tanks, pump and control valve. Its transparent layers can be made of tempered glass or Plexiglas that both of them are separated by a spacer. The way it works is that colored liquid is injected into layers through the pump. The system has the ability to change transparency in less than an hour and make one way vision glass, if necessary. Laboratory samples of this design were built during the 8 stages of the process which includes: -1 Controlling light passing through the window by colored liquid, -2 Controlling light passing through the window by various colors, -3 Controlling window visibility and transparency, -4 Creating various colors by mixing primary colors, -5 The ability to use the idea for walls: Using window idea in designing internal walls and Using window idea in designing external walls, -6 The ability to paint a wall with various colors, -7 The ability to move the location of thermal insulation, 8. The ability to control the system by a computer. In this paper, Variable Building Layers System is explained and discussed in detail as it is used for windows and walls. Three transparent layers that is injected colored liquid between them will create variable properties in windows and walls. The main objective was to achieve maximum variability in building walls and it was assumed that changing colors will decrease or increase the light passing through layers, so in order to prove this hypothesis, experiments were performed. Due to different absorption and passing light from various colors their shadow had a different temperature. The main advantage is that these layers vary based on outside conditions by controlling sunlight and heat daily. The external walls was also added a tank of argon gas (as a thermal insulation) to reduce temperature swing inside the building. These layers can achieve benefits such as varying color and transparency, and control the amount of light passing through them, decreasing or increasing the heat capacity, and also moving the location of thermal insulation manually or automatically by computer. Using various colors in windows and walls will provide different thermal and psychological effects on occupants. Opacity or transparency of these layers can provide appropriate view and sunlight because it is possible to make part of the layer opaque and also to allow daylight to pass through from transparent part. It also creates less design limitations for architects. As bright colors reflect sunlight much more than dark colors, so changing color of façade can increase or decrease absorption of solar energy and reduce heating and cooling energy consumption. Based on Johannes Itten’s Color theory, it can make you feel 3 to 4 degrees centigrade warmer or cooler by selecting warm color for winter and cool color for summer without using energy. Each climate requires walls with different heat capacity but in this system it is possible to adjust the heat capacity with indoor temperature. Heat capacity of water is more than air so if the middle layer of the wall fills with water, temperature swing will decrease and also with reducing water level and replacing air, heat capacity will become less. In these walls, thermal insulation can be inside or outside of the walleither manually or automatically by a computer daily. In temporary-use buildings heat is removed after passing through the thermal insulation but it is possible to change location of the insulation towards outside after passing heat and it is not allowed to remove. To sum up, Heat capacity and thermal insulation can vary in every climate based on different seasons that leads to reduce indoor temperature swing. Noting that the heat transfer occurs in the building by three methods, changing layers can make different thermal resistance. As thermal conductivity of water and air and argon is respectively less than the other, heat transfer by conduction and convection depends on what matter and what height layers is filled. Glass walls are able to allow sunlight to enter rooms in the winter (if heating is needed) that absorb and store sun’s warmth and so radiation heat transfer causes a reduction in heating. Another advantage of this system is that external and internal walls are respectively up to 10 centimeters and 3 to 5 centimeters in thickness and so reduced thickness of walls leads to increase surface area and volume of the building. Wall thickness reduction compared to the same walls is noticeable because of reducing weights of building materials. Therefore it will decrease building subsidence and increase earthquake resistance of the building. As previously mentioned glass layers will provide natural light and suitable perspective and even if walls need to clean, these layers will allow washing. According to descriptions, Variable Building Layers System can be use in many buildings such as houses, offices, greenhouse, museums, galleries, libraries and etc., because of varying color of walls, controlling heat and light and moving thermal insulation and generally compatible with each climate.

Volume 5, Issue 4 (5-2016)
Abstract

If the organizational excellence models employ correctly, they would be effective tools for institutionalizing organizational concepts & values, employing self-assessment methods, organizational learning and continuous improvement in the organizations. And also it will provide recognition of the best processes. Islamic Republic of Iran Police tries to design and operationalize its excellence models, but the proportionate excellence patterns that can be applicable for Islamic Republic of Iran Police, hasn’t designed and executed yet. So the subject of this research is to design an organizational excellence model in Islamic Republic of Iran Police. To develop this model weights of criteria has obtained using analytical hierarchy process (AHP) and relationships between criteria has determined using DEMATEL method. results show that leadership criteria has the highest score between enablers and the most effectiveness on others. Additionally, client results have the highest score between results and is the main receiver between other criteria. Finally a hierarchy method to prioritize improvement projects has suggested.

Volume 6, Issue 1 (winter 2018)
Abstract

Aims: Since the occurrence of hazards in the steel industry has often been multiple and complex, the aim of this study was to identify the risk assessment in this industry in order to study the roots and realities of the risks and the causes of their occurrence, as well as to find solutions to reduce these risks.
Instruments & Methods: This descriptive-analytical research was conducted in the cement industry in Khorasan Razavi in 2017. FMEA and AHP methods were used to determine the most important safety hazards. The Risk Priority Number (RPN) was obtained from the multiplication of 3 factors including severity, probability of occurrence, and probability of discovery. Risk tolerance was used for the acceptable and unacceptable risks in the FMEA method.
Findings: The fluctuation of the flange and its breakage due to excessive water pressure in the furnace and lack of lighting for installation of the equipment in the furnace had a high risk. In the AHP method, the risk of breaking the flange was due to excessive water pressure in the furnace and lack of lighting to install the equipment in the furnace, which had a higher weight than the other hazards.
Conclusion: Although in the developing countries, the use of risk analysis methods with a preventive approach is not common, these problems have been resolved by communicating with the industry by recent studies.
It also emphasizes the use of decision-making methods to minimize the impact of judgments on risk assessment.

Volume 6, Issue 3 (Summer 2018)
Abstract

Aims: Osteoporosis is a major public health problem in the world, which can be prevented or its onset can be delayed through some lifestyle changes. The aim of this study was to assess the application of the precede-proceed model in promoting physical activity for prevention of osteoporosis among women.
Materials and Methods: The present quasi-experimental study examined the application of precede-proceed model on the physical activity of 120 women with the age range of 15 to 49 years old, who were selected by multistage random sampling in Kerman in 2014. The participants were divided to the control (n=60) and intervention (n=60) groups. Among the preventive behaviors of osteoporosis, physical activity was selected for the educational intervention. The educational intervention lasted for 2 months. An international standard questionnaire was used to measure physical activity, and a researcher-made questionnaire, according to the constructs of precede model was used to collect data before and after the intervention. The data were analyzed by SPSS 20, using Mann-Whitney, Wilcoxon, and Chi-square tests as well as descriptive statistics.
Findings: After educational interventions, the mean scores of predisposing, reinforcing and empowering factors, as well as osteoporosis preventive behaviors (physical activity) significantly increased only in the intervention group (p<0.001).
Conclusion: Health education and health promotion interventions based on precede-proceed model can lead to increased physical activity and eventually prevent osteoporosis in women.


Volume 6, Issue 4 (2-2017)
Abstract

The aim of this study is to provide a model for improving the quality of statistical services based on the areas of Statistical system, organizational environment, and statistical processes and statistical outputs national framework statistical quality assurance. Research has functional purpose, and descriptive and analytical method. The population consisted of two community Statistical Center of Iran experts and users that simple random sampling method was determined. Data collected by two different questionnaires and conceptual research model based on relations of factors affecting the quality of statistical services was defined. After drawing model the two communities convergent and divergent validity of tests and questions and Hypothesis of two models was conducted. Results showed that both models have good quality and visible variables affect factor loadings on Structures with different intensity. Finally, the researcher using the results, decided to present model as "analytical model quality statistical service (Adel azar, Abbasi 1394) based on severe impact on the gap between the quality of service provided by the manufacturer and the quality of service received by the data user and proposals to improve the performance of statistics manufacturer and data users according to the type and severity of factors affecting the quality of statistics were presented.  

Volume 6, Issue 4 (2-2017)
Abstract

Human sciences composed of specialized subsidiaries, as well as various areas of Engineering and Applied Sciences. Knowledge of human evolution suggests that humans increased their specialized knowledge the fields in psychology, philosophy, art, sociology, etc. In applying this Science applied approach should be taken. Managers are facing different tools and techniques to select which are in form of algorithmic methods, discursive practices, operating methods and their combination and application in decision-making. This results in confusion in adopting and applying these techniques needing Necessary expertise due to the extent. Existing concern is seeing how these techniques can be used efficiently. This research, according to the theory of systems, will discuss the introduction of axiomatic design techniques for dealing with mentioned challenges. A comprehensive framework including criteria and factors affecting quality of textbooks were presented and 3 organizational behavior management Books were assessed by Faculty members of Faculty of Industrial Engineering and Management in Shahrood University using this framework.

Volume 8, Issue 35 (11-2020)
Abstract

Abstract
Folk poems are one of the most pleasing types of oral literature among the Iranian ethnic groups, which represent the spirits, thoughts, and ideas of the masses, and arise from their natural and daily needs. Songs and poems are forms of popular literature and are diverse in the cultural geography of this land. Folk poems in Kerman province are titled differently and are mostly composed in the form of couplets having a particular prosody. The common couplets of this region in different ceremonies have titles such as Sharma, Ajaghboos, Birghi, Kheloon, Mordekhani, Abado, Sar-Asyabi, Aino, Biabani, Kurdish reading, Hujlashshoon, Gharibi Khani, Hanabandi, in the bathroom, etc. These poems fall into the realms of server, mourning, work, sleep and caressing poems, lullabies, game songs, entertainment, and prayer. This study employed the descriptive-analytical and library methods in order to introduce the folk and local songs of Kerman province, and analyze and classify the poems based on their themes so that the cultural prospects and local elements can be obtained.
Kerman; folk poems; oral literature; theme; popular culture.
 Research background
The first person who has done a study in the field of popular culture of people in Kerman is Lerimer. Ali Tavakoli (2015) has studied the literature and popular culture of Amjaz in another research. Moayed Mohseni (2007) in her book on popular culture of Sirjan has introduced the popular culture of people of that region, and since her work is based on the method of observation and participation, she has been precise and delicate.
Koohi Kermani (1966) is another pioneering work in collecting rural legends and songs of Kermanians. In 1931, he published a book of national songs, which attracted the attention of literary circles. Also, on the music and couplets of Kerman, case studies and only a few articles have been done so far, which are as follows: "Music of the regions of Kerman province" by Towhidi (2011), "Themes of local songs, a case study of Sirjan songs" by Moayed Mohseni (2013), "Analysis of rhyme and line structure in Kermani native poems of Shahrbabak city" by Riahi and Radmanesh (2019). In the latter study, a real view of the folk songs of Kerman province is provided.
What distinguishes the present study from the others is that so far no research has been done in relation to Kerman folk poems. Therefore, this study aims to fill this gap.
Aims, questions, and assumptions
The aim of this research is to study and classify the popular and local poems of Kerman province, which are performed in different ways and sometimes with music. It is also aimed to examine any poem that refers to their indigenous elements and religious beliefs in order to be able to show the manifestations of Kerman culture.
Considering the variety of melody types, songs, and chants in this vast region, it can be said that Kerman is a treasure trove of oral culture the richness of which can be seen in less places, because it has never been invaded by foreign and non-Iranian tribes, and because of this, its songs, chants, and music are kept intact to a large extent.
This article seeks to answer the following questions:
1. What is the content of the popular and local poems in Kerman province?
2. How many categories are there for the popular poems and songs considering their content?
Results and Discussion
One form of folk literature is folk poetry, which are sung on various occasions during work, celebrations and rituals, mourning, play and fun, putting children to sleep, and entertainment. They are mostly in the form of local songs, accompanied by traditional music. They are the source of human manifestations and thoughts, and represent the history of culture, life, and expressive thoughts of people who express their feelings in a completely obvious and untouched way. In the meantime, popular and local songs and chants have a prominent role that have been passed down from a distant past, and have circulated around Iran, particularly in the geographical area of ​​Kerman.
Popular art and literature in Kerman province reflect an important part of the rich and diverse culture, a culture that is rooted in the turbulent history of thought and customs of different tribes, ethnicities, and races (Persians, Arabs, Kurds, Lors, Turks and Baluchis) and the ancient natives of this region.
Considering the variety of melody types, songs, and chants along with the vastness of this region, it can be said that Kerman is a treasure trove of oral culture, the richness of which can be seen in few places. This has made the songs, chants, and music in this area remain pristine.
Folk music and local songs in Kerman province have various names such as Shink Bilal, Holoo Halo Holoo, Seriao Gonal, Ey Dalak Sar Tarash, Ji Saro Ji Saro, Dokhtare Dekandar, and Hey Ya Lalal. The most important types of Kerman musical instruments are Nay, Anban reed, drum, and harp (Nazari, 2011, p. 146). The classification and arrangement of these poems, based on the theme and content of the songs or local hymns, are as follows: 1. Sur hymns, 2. mourning, 3. work, 4. romantic, 5. epic, 6. childish, 7. entertaining, and 8. religious.
Conclusion
Considering the variety of melody types, songs, and chants, it can be concluded that Kerman music and folk songs are unique in terms of quality and quantity, and have a special place in Iran. Further examination of the songs reveals that their composers were tasteful, but anonymous, and in only a few cases, titles such as "Hosseina, Mehdi and Baqir" appeared in some of the songs. Also, the content of some songs shows that their composers were women.
Kerman folk songs and literature are still prevalent in many cities and among generations to come. Some songs are a combination of common songs in other parts of the country that have reached Kerman from elsewhere and after brief changes, have been combined with the dialect and living environment of the people in Kerman for many years. In some cases, it can be said that Kerman's special couplet is written in that line. The folk poems and songs in Kerman could be divided into seven groups based on the theme and content of the songs.
References
Koohi Kermani, H. (1966). Seven hundred songs from rural Iran (in Farsi). Ibn Sina Library.
Moayed Mohseni, M. (2007). Sirjan folk culture (in Farsi). Kerman Studies Center.
Moayed Mohseni, M. (2013). Themes of local songs; A case study of Sirjan songs. Culture of the Iranian people, 32, 183-200.
Nazari, G. (2011). A study of climatic elements in the poetry of local poets in the south of Kerman. MA Thesis of Hormozgan University, Hormozgan, Iran.
Riahi, F., & Radmanesh, A. M. (2019). Analysis of rhyme and line structure in Kermani native poems of Shahrbabak city. Local Languages, 1, 53-70.
Towhidi, F. (2011). Music of Kerman province. Culture of the Iranian People, 27, 85-111.


Volume 9, Issue 2 (summer 2021)
Abstract

 Comparative literature uses the method of comparison to study the literature of different languages ​​and their complex relationship at different times and in various areas of subjects, schools of thought, literary theories, literary types, etc. Payment. In the Kurdish language, there are some poetic lyrical stories influenced by Khosrow and Shirin, but so far no significant research has been done in the field of their application. The Kurdish poem Shirin and Farhad, narrated by Mirza Shafi Pavehi, is one of the poems written following Khosrow and Shirin Nezami. In simple and fluent language, this work tells a different story about the story of Shirin and Farhad with a mythical structure. In the Kurdish system, apart from the names of the characters, the main course of events and the general framework of the story differ from the military narrative. In this research, which has been done in a descriptive-analytical and library method, the author intends to analyze the building blocks of the story in two poems "Khosrow and Shirin" and "Shirin and Farhad" by Mirza Shafi, strengths and Identify their weaknesses and gain more knowledge about them. In this study, the differences between these two stories in the field of story design (conflict, knotting, untying, accident), characterization and staging were examined. Studies in this field show that Mirza Shafichr('39')i did not do well in imitating the military system and the elements of the story in his work are poorly represented, which makes the plot of Shafichr('39')s story weaker than the military.

Volume 9, Issue 3 (fall 2021)
Abstract

Attar has shown everyone the experience of love, self-discovery, self-knowledge and divine knowledge in his books. He knows the path to perfection by passing through asking stage, love, knowledge, independence, monotheism, astonishment, poverty, and mortality. He guarantees perfection and reaching the source of love for human beings by self-knowledge and showing the different dimensions of human. Maslow is trying to introduce self-actual human by defining levels for human needs. Attar tries to fill the cup of existence with pure wine and doesn't neglect his own society. According to the expression of human's demands for the language of birds in Manteq ul-tayr and princes in Elahinameh, the comparative-analytical investigation of Maslow's the need theory and two books of Elahinameh and Manteq ul-tayr will tell us more about Attar's science and personality. Attar, after his experiences and Achieving perfection, lead his community to grow in all dimensions, consciously. By studying successful people, Maslow is also looking for a quantitative concept for the perfect human. Attar's poems are his practical and theoretical diagram of growing needs.

Volume 9, Issue 17 (Spring & Summer 2022)
Abstract

The words that have close meanings, which are known as synonyms, are a challenge for the interpretation and translation of Holy Qur'an. Importance and sensitivity of interpreting and translating the Qur'an becomes more apparent when we accept the principle of non-synonyms in Holy Qur'an because sometimes only one word can be expressed in the target language for several words from the Holy Qur'an. Careful selection of translation words in such cases brings the audience closer to signification, main purpose and wisdom of choosing these words from God Almighty, as well as complying with the standards hidden in the truth of the words, which reveals the rhetorical miracles of the Qur'an more than ever. The present research has attempted to use a descriptive-analytical method through selecting a sample of these synonymous words, namely the words covenant and oath mentioned in verse 27 of Surah Al-Baqarah as well as examining the word violation, which is a common verb used for these two words in the Holy Quran. First, the semantic aspects of the words are explained, and according to these features, differences and the described semantics, the approach of translators and commentators is assessed, and at the end a suitable lexical equivalent in Persian language is presented. The results of research show that the word "violation" implies an auditory and resonant concept, which does not have an exact equivalent in Persian language. The two words "covenant" and "oath" are not synonymous and have a subtle difference in meaning that should be reflected in translations.
 

Volume 13, Issue 56 (10-2015)
Abstract

In this research drying kinetics, moisture diffusivity and determination of most appropriate mathematical modeling and activation energy of Mazafati dates species were studied under a cabinet solar dryer.Drying experiments were carried out at three air temperatures of 50, 65, and 80ºC and three air velocities of 1.0, 1.5, and 2.0 m/s. Effect of temperature and air velocity evaluated on drying time and shrinkage by using a completely randomized statistical design. Results showed that the effects of temperature and air velocity are significant on drying time. The average increase of temperature from 50ºC to 80ºC caused the drying time to decrease by 70.77%. For determination of most appropriate model, the highest value of R2 and the lowest values of c2 and RMSE were used. For mathematical modeling, eight empirical models were fitted on experimental data and the best model was selected. The result of regression analysis showed that Page model has the best fitting with data. Moreover, the lowest and highest value of moisture diffusivity were obtained as 4.309×10-10 and 0.0188×10-9  m2/s at temperatures of 80°C and 50°C, respectively. Also the values of activation energy in the drying of Mazafati dates species were found between 31.22 to 42.27 kJ/mol.  

Volume 14, Issue 16 (Forth Special Issue 2015)
Abstract

Shape optimization of free form shell structures with different objective and constraint functions including the stress constraint is the subject of this article. To construct the geometry B-Splines are employed that allow generating smooth free form geometries with a small number of parameters which are considered as the design variables of the optimization problem. For analysis, the finite element method by using the Wilson’s quad shell element is employed. For shape optimization, in each step of the optimization process the mesh generation, finite element analysis, sensitivity analysis and geometry update steps are repeated until convergence. Maximization of the stiffness of structure with volume constraint and the minimization of the weight of structure with the von Misses stress constraint are the addressed problems of this article. In both kinds of problems, the applicates of the control points are considered as the design variables of the shape optimization problem and the sequential quadratic programming (SQP) is employed to solve the optimization problem. Since in this approach, the derivatives of the objective and constraint functions are needed, the sensitivity analysis is carried out in each step by the finite difference method. The quality and smoothness of the obtained results together with the convergence graphs of the presented examples are indicative of the usefulness and efficiency of the proposed approach for shape optimization of shell structures.

Volume 15, Issue 1 (3-2015)
Abstract

Using Muskhelishvili and Kolosov complex potential functions, an elastic solution is presented in this study in order to investigate stress components around circular tunnels reinforced by concrete lining with constant thickness. It was assumed that rock mass and concrete behave as isotropic linearly elastic materials. The rock mass undergoes an in situ stress field. It was also supposed that rock and concrete interface is in no-slip condition so that they have common displacement. Due to complexity of the problem for concrete reinforced layer, conformal mapping functions were utilized in order to find a solution. Supposing plane strain condition, the problem was solved, and a closed-form solution was obtained. The solution was compared to Kirsch solution, in which the lining thickness was reduced to zero, and also ABAQUS finite element software results, which showed a good agreement, except for ABAQUS software predictions around crown of tunnel lining periphery where some discrepancies were found; also it was demonstrated that this solution predicts stress components at inner lining periphery much more accurately than ABAQUS software. Finally, a sensitivity analysis based on rigidity and thickness of liner was conducted and some propositions were made on design of concrete liner. The advantage of this solution lays in the fact that it has quicker and more accurate calculation process compared to numerical methods.

Volume 15, Issue 1 (12-2023)
Abstract

Rapid and sensitive diagnosis of breast cancer, especially in the early stages of its formation, is very important. One of the methods of detecting cancer cells is the use of electrochemical sensors. Here, a new nanocomposite including an organic metal framework and silver nanoclusters are used. The resulting nanocomposite can be used as a scaffold to attach antibodies for the detection of HER2-positive cells. In the final nanocomposite structure, silver nanoclusters are placed in the internal cavities of the metal-organic framework, leading to strong electron transport, good biocompatibility, and high electrochemical activity. Our results showed that the designed electrochemical sensor has a high sensitivity in identifying HER2 positive cells, with a detection limit of 3 cells and a linear range of 100 to 5000 cells/ml. Also, the investigations showed that the introduced sensor has stability, good selectivity and acceptable application. The proposed strategy for the development of sensors based on metal-organic frameworks provides a promising approach for early detection of cancer markers and living cancer cells.
 

Volume 15, Issue 3 (6-2024)
Abstract

Magnetic nanoparticles (MNPs) have emerged as contrast agents in magnetic resonance imaging (MRI) and metal-organic frameworks (MOFs) due to their high porosity and adjustable structure, serving as drug carriers and new contrast agents in biomedicine. Designing efficient nanoplatforms that leverage the combined properties of both MNPs and MOFs is of great importance.
In this study, we introduce a simple in-situ synthesis method for a mesopore core-shell nanocomposite structure of MOF@Cu-ferrite. Initially, Cu-ferrite nanoparticles were synthesized using a hydrothermal method. Subsequently, the addition of fumaric acid to the Cu-ferrite nanoparticles activated the F0 component, inducing MOF nucleation. As a result, the Cu-ferrite core was gradually covered with a crystalline MOF shell, forming the MOF@Cu-ferrite structure. The MOF@Cu-ferrite nanocomposite is characterized by high porosity, numerous accessible surface functional sites, good crystalline stability, low toxicity of copper, excellent water dispersion, high magnetic properties, and cost-effectiveness. This study investigates the effect of the MOF@Cu-ferrite nanocomposite on the MRI signal intensity. T2-weighted images were obtained using MRI scanner at various iron concentrations of the magnetic nanocomposite, showing a significant change in signal intensity with increasing iron concentration. The transverse relaxivity rate (r2) for different iron concentrations was found to be 504.7 mM-1s-1. The results showed that Cu-ferrite magnetic nanoparticles coated with MOF have significant potential as negative contrast agents in MRI, reducing T2 relaxation time and improve contrast intensity in MR images.


Volume 16, Issue 5 (ویژه نامه- 2016)
Abstract

The lack of accessibility of high quality materials and the increased costs associated with the use of these materials will finally demand engineers to use local soils. In such cases, ground improvement performed reasonably in many conditions. Ground improvement can be defined as the procedure of increasing shear strength parameters and decreasing the permeability and compressibility of the soil. Different methods can be used to improve the geotechnical properties of the problematic soils such as loose sand that one of them is using additives. The stabilization of soils with cement is an attractive technique due to economic and environmental issues and avoiding the use of borrow materials from elsewhere. Cementation of sand results in increased brittle behavior as peak compression strength increases. The compressive strength of artificially cemented soils has been studied in the past by several investigators.A number of studies have also reported on the influence fiber, glass, fly ash, silica fume and nono particle on the mechanical behavior of cemented sands .However, to the author’s knowledge, there has been a little effort devoted to the research on the use of pozzolans such as natural zeolite as an addictive material to the cemented sands. Natural zeolite, an extender, has been investigated for use as cement and concrete improver by some researchers.
It is widely known and well emphasized that the cemented sand is one of economic and environmental topics in soil stabilization. In some instances, a blend of sand, cement and other materials such as fiber, glass, nano particle and zeolite can commercially available and effectively used in soil stabilization in road construction. In this investigation, zeolite and its effect on unconfined compression studied as one of addictive material to cement. Therefore, cilinopiolite kind of zeolite, Neka cement type II and Babolsar sand are used. A total number of 144 unconfined compression tests were carried out on 24 combination type of cement and zeolite include different cement percentages 2, 4, 6 and 8 percent of total dry weight of samples and replacement percent’s of 0, 10, 30, 50, 70 and 90 zeolite with cement based on 50,70 and 85% relative densities in7 and 28 days curing times. Results show that in 28 day curing time, by replacement percentage of 30 zeolite material by cement, the unconfined strength increased 20 to80% in comparison with cemented samples by increasing shear strain. For higher cement content and less compacted blends, these improvement rates are more. At the end, a power function fits presented to relate unconfined compressive strength (UCS) and zeolite-cement-soil parameters (porosity (n) and voids/ polynomial model of cement and zeolite voids).It is widely known and well emphasized that the cemented sand is one of economic and environmental topics in soil stabilization. In some instances, a blend of sand, cement and other materials such as fiber, glass, nano particle and zeolite can commercially available and effectively used in soil stabilization in road construction. In this investigation, zeolite and its effect on unconfined compression studied as one of addictive material to cement. Therefore, cilinopiolite kind of zeolite, Neka cement type II and Babolsar sand are used. A total number of 144 unconfined compression tests were carried out on 24 combination type of cement and zeolite include different cement percentages 2, 4, 6 and 8 percent of total dry weight of samples and replacement percent’s of 0, 10, 30, 50, 70 and 90 zeolite with cement based on 50,70 and 85% relative densities in7 and 28 days curing times. Results show that in 28 day curing time, by replacement percentage of 30 zeolite material by cement, the unconfined strength increased 20 to80% in comparison with cemented samples by increasing shear strain. For higher cement content and less compacted blends, these improvement rates are more. At the end, a power function fits presented to relate unconfined compressive strength (UCS) and zeolite-cement-soil parameters (porosity (n) and voids/ polynomial model of cement and zeolite voids).

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