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The purpose of the semiotics of discourse approach is to communicate between semantic layers and differentiating units of the linguistic, social and intertdiscursive conext at the macro level in order to achieve meaning with the help of cognitive tools of text and discourse. This research interprets and explains how to produce, understand and receive meaning in the context of discourse systems in "Wuthering Heights" within the framework of the semiotics of discourse approach. Discourse systems include two categories, either they are based on Speech-Action and Movement-Action (Behavior) which create cognitive discourse systems or they are based on Sense-Action­ which are the generators of emotional discourse systems. In this research, the representation of Speech-Action, Movement-Action (Behavior) and Sense-Action­ and their feedback in the participants within the text and discourse of the novel has been discussed. Discourse analysis in the text and situational context of the novel based on the semiotics of discourse approach of Greimas is rooted in cognitive perspectives, because Speech-Action and Movement-Action build the infrastructure and a platform for the motivation of Sense-Action­ in the audience of the discursive context. Heathcliff and Catherine are two main characters of the novel who depict the Sense-Action­ of love along with the behavior and Speech-Action of revenge in the textual and intertextual semantic layers. Heathcliff gains the necessary mental, physical and financial competences and performs the action by going through the first stage of Sense-Action­

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The purpose of this study is Understanding status and relationship between empowerment and contextual performance with job satisfaction of employees of Islamic Azad University Dezful Branch. Empowerment based on Bowen and Lawler of model (1992), contextual performance based on Van Scotter and Motowidlow of model (1994) and job satisfication based on universal model of single question measured. Proportion with purpose of study, two main hypothesizes and ten secondary hypothesizes codified. Statistical social of this study was 355 personals of this university branch. Tools used in this study to collect data was questionnaire. This questionnaire has three sections that one section is job satisfication based on universal model of single question, second section is empowerment based on Bowen and Lawler of model (1992) in four dimensions which includes information sharing, trust, training and reward and third section is contextual performance based on Van Scotter and Motowidlow of model (1994), which includes two dimensions of facilitation of interpersonal relationships and dedication work. The Cronbach's alpha reliability coefficient was approved by them. Meaningful relationship and coefficient correlation between empowerment and performance and each dimensions of their with job satisfication were investigated. Then structural equation model was used to test the theoretical model and the direct and indirect effects of these factors on job satisfaction of employees were found. Results of tests impress that each of components empowerment and contextual performance with job satisfication have meaningful relationship and had seen among of dimensions of their only training with job satisfication has not meaningful relationship.

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Issue: The Covied-19 Pandemic showed the vulnerability of cities in their current state and revealed one of the strongest stimuli for the need for radical rethinking in Urban Planning. One of the theoretical approaches that has been considered by many cities in developed countries is the 15-Minute City Approach. density, proximity to complementary and consistent functions are its basic principles.
Aims: The purpose of this article is to study the concept of a 15-Minute City, identify the components of achieving it and feasibility study of the adaptation this approach in Iranian cities as a post-pandemic urban planning approach. As a case study, Mehrshahr, Karaj has been studied.
Methodology: It is applied research that is applied descriptive-analytical method. In the analysis of access to index uses, the analysis of the pedestrian network in GIS software was used and using SWOT and QSPM techniques to determine and prioritize strategies for future development. The study area in the direction of the city was 15 Minutes.
Findings: The lack of functional diversity (vacuum in educational, religious and medical uses) and the lack of path continuity and very poor flooring for pedestrians are important issues in this area to adapt to the 15-Minute City approach.
Conclusion: Ensuring the safety and security of pedestrians and cyclists, providing infrastructure and services required for pedestrians and cyclists, applying the principles of mixed and multiple land use and balanced distribution of services are the most important strategies proposed.

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Protein hydrolysate (PH) from viscera of cultured Siberian sturgeon (Acipenser baerii) was produced. To optimize the production conditions, Response Surface Method (RSM) was employed to examine the effects of three different operating conditions, including time, pH, and enzymatic concentration (Alcalase) on the degree of hydrolysis.The mathematical model showed acceptable fitness of the experimental data as R2 equaled 0.97, which indicated  that   major part of  the  variability  within  the  range  of  values could  be explained  by  the  model. The results showed that the highest degree of hydrolysis (58.21%) was related to the treatment which happened at the enzymatic concentration of 2%, 60 minutes time, and pH=8. Treatment under hydrolysis condition (i.e., E/S = 2%, Time = 45 min, and pH = 8.5) had the highest protein content (42.37g/l), which was used as an alternative to commercial peptone medium (Triptic soy broth) to assess the growth of Salmonella typhi bacteria from 0 to 48 hours. Although there was an upward trend in growth rate of S. typhi both in control and No. 15 (Alcalase) treatments, the log growth of control treatment was found to be better than that of Alcalase treatment. However, there existed no significant difference between the two treatments.

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Abstract
Conflict is defined as a situation in which one human group is at involvement with another owing to aims that are incompatible. Due to their features and capacities, the Islamic Republic of Iran and Saudi Arabia are two decisive and significant countries in the area. The Islamic Revolution of Iran has created a field of rivalry and conflict between two countries, which has impacted other surrounding areas. Yemen is one of the most important areas in the sector, owing to variables such as closeness to Saudi Arabia, the Arab Spring, a large Shiite population, the emergence of Shiite organizations and movements, geostrategic location, and so on. The two regional powers' geopolitical interests are located. The purpose of this descriptive-analytical research is to learn more about the nature of the war in Yemen between Iran and Saudi Arabia. What reasons have contributed to the emergence of conflict and rivalry between Iran and Saudi Arabia in Yemen? That is the major subject of the study. The study's results suggest that the war in Yemen is rooted in geopolitical and ideological cases.
 
 
 
 
 
Key Words: Iran, Saudi Arabia, Conflict, Geopolitic, Yemen.

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Introduction
Urban studies thinkers consider citizens' participation as one of the infrastructures for increasing in the capabilities of urban management. In order to citizens' participation to be meaningful and express the main concept of participation, it must be on a local scale and then reach the transnational arena. Neighborhoods, as the most fundamental elements of cities, have a special place in shaping and organizing the affairs of Tehran. With the establishment of the Pahlavi government and the effort to modernize Iran and the growth and increase in the population of cities, the traditional structures of urban life, including neighborhoods, underwent a transformation. The Law of City Associations was approved before the revolution, but it took many years to pay attention to neighborhood life again with the formation and implementation of the city's Islamic councils in 1998. In recent years, the neighborhood has been defined as the center of concentration and connection of urban services - people and municipality - in the smallest structural area of Tehran municipality. This center was chosen in such a way that all the possible capacities of the municipality can be delegated to it, and at the same time, concrete and objective participation of the citizens was directed to it in all areas that can be participated in, and new and up-to-date functions were defined for it. New social theories consider women's participation in sustainable development processes to be essential, and since the field of women's activity is traditionally wider in the fields of family and neighborhood, the local administration has envisioned a special role for women in city affairs and implemented special programs to improve their quality of life. In an environmental approach, women have the ability to play a greater role as leaders or active participants in smaller communities such as urban neighborhoods. It can be said that women play an essential role in local social cohesion. This type of connection is especially necessary to achieve social planning and successful management in multicultural societies. Because experience has shown that women pay attention to the dimensions of the needs of all groups in society and are not limited to the views and desires of powerful and effective members of society and often seek to create bridges over social, cultural and racial divisions as well as incompatibilities in society. That society will lead to a better life.
Research findings
Based on this, the current research tries to investigate the effect of local women's participation in the programs of active organizations (Serai Mahlah) on improving their quality of life. Angeh, Homayun Shahr and Aqdasiye neighborhoods were introduced and selected as examples by the neighborhood management strategic headquarters because of their active role in this matter. In the current research, a survey method was used with the two goals of description and explanation. At the level of description, the goal is to provide information on the level of participation of women in the administration of neighborhood affairs, and at the level of explanation and analysis, the goal is to find the existence or non-existence of a relationship between independent and dependent variables. At the same time, it has been used to compile the theoretical foundations and review previous researches in a documentary (library) way. The statistical population of the research is made up of the women of Tehran's active neighborhoods in the field of participation in the administration of city affairs, and on this basis, two groups of active and inactive women were selected from among the women of these neighborhoods and investigated. In this research, the sample size is 240 tons, which was determined based on Cochran's formula, which is divided into two parts (124 active tons and 116 inactive tons). In the sampling method, there are two important reasons for choosing the neighborhood center, one is that the manager of the neighborhood is a woman, and the other is the introduction by the neighborhood management strategic headquarters as the most active centers in the neighborhoods of Tehran, which are Angeh, Homayoun Shahr, and Aqdasiyeh neighborhoods. Available sampling method was used to select local activists and random sampling method was used for inactive people. A questionnaire was used to collect information. After verifying its validity and reliability in the preliminary stages of the research, the questionnaire was used to collect the required data in the final stage. The results obtained from this research show that the existence of the neighborhood management institution shows that the participation of citizens is recognized as a necessity and need for collective life, and women are not excluded from this as citizens of the society. Sarai Mahalat is active as one of the sub-institutions of neighborhood management, and the use of the services provided in it can have a significant impact on improving the quality of life of women in various dimensions, and the officials are required to provide the necessary conditions to create the necessary infrastructure and facilities in this regard. On the other hand, they should create the necessary motivation in women in different ways so that they also become eager to participate in local affairs (various aspects), because compared to men, women devote more time to work inside and around the house (local area), so they have deeper experiences, knowledge and insight to build the environment around them. According to Arnstein and Hannah Arendt, if women can have an active participation in the administration of local affairs and not just a theatrical participation, they can actualize and realize their potential talents in various fields. It seems that if the participation of women at the local level has positive results (as the results of this research confirm this), it will lead to this fact that women are encouraged to participate at higher levels of society, which will facilitate the development of the country.
Conclusions
In the present study, the impact of the use of services provided in Sarai Mahalat on the quality of life of service users was investigated in different dimensions. At first, the presence or absence of a relationship was measured using Pearson's correlation coefficient, which confirmed the existence of a relationship between women's local participation and the improvement of their quality of life in different dimensions. In the following, the difference between the average scores of the group that used the services and the group that did not use the services was investigated using the T-test, and according to the obtained scores, the hypotheses of the research were confirmed. After that, two-dimensional tables were used to clarify the relationship between dependent and independent variables. The results of these tables show that the intensity of the relationship between local participation with the quality of life and physical health is greater than the intensity of its relationship with economic empowerment.

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Abstract
Research subject: Low biodegradation rate of plastics, especially different grades of the polyethylene leads to many environmental problems. To reduce these effects, pro-oxidant added to the polyethylene to increase the photo-degradation and subsequently the bio-degradation rate of the polymer matrix. Besides the pro-oxidant, it seems that the photocatalysts can affect on the photo-degradation of the polyethylene and the subject of this study is to examine this idea.
Research approach: Photodegradable films of LDPE were prepared by melt blending of the polymer with cadmium selenide (CdSe) and trisilver phosphate (Ag₃PO₄) as photo-catalysts and manganese stearate as pro-oxidant. The samples were irradiated with visible and ultra-violet light. Scanning electron microscopy (SEM), dynamic mechanical thermal analysis (DMTA), differential scanning calorimetry (DSC) and viscometry measurements were used to investigate the microstructure of the films.
Main results: FTIR spectra indicated to increment of the carbonyl index (CI) and vinyl index (VI) of the samples with photo-catalysts. In addition, SEM imaged confirmed higher and more homogeneous photo-degradation for these samples in comparison with other ones. Also, the dynamic-mechanical-thermal analysis showed that the polyethylene samples without the additives had higher modulus compared to other samples. However, the crystallinity of the samples with photo-catalysts increased due to nucleating agent effects of their particles. The viscosity of the samples containing the photo-catalysts and  pro-oxidants decreased significantly and the modeling results showed that this decrement  was due to the polymer chain degradation and reduction of their molecular weights. In general, the results showed that the combination of the photo-catalysts and the pro-oxidants had synergistic effect on the photo-degradation of the LDPE and accelerates its degradation process a lot more in comparison when only the pro-oxidant was used.

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The purpose of this study is to examine the effects of folk culture in Joseph Arthur Gobino's travel book entitled “Three Years in Asia” , based on the content analysis method in which he tries to divide these effect in six categories of hospitality, compliments, customs and types, Iranian art, architectural and urban features and the story of his trip to Iran. Superstitious thoughts were also studied and analyzed. The result of this study shows that although in his account of his trip to Iran Gobino was able to provide a detailed account of Iran's morality and behavior patterns, it would be impossible not to ignore the contrast between the European “I " and the oriental “other” that underlies his thoughts and descriptions of different aspects of Iranian life and customs. Conflicts that have a direct impact on the spectator's mind with the other and with what belongs to his territory, followed by his reports and descriptions.
 

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    Iranians struggled to change their destiny in the hard times of their history through resistance and sometimes peace and reconciliation. In the meantime, besides the continued efforts of the elite class, public efforts must also be made to bring about a favorable situation for coexistence with the ruling class. The less educated people whose idealistic minds were embracing historical reality to view events more easily, grasped the imagination and the legend, and continued to live their lives by building new ideas. The legend of the Mongolian Girl which comes from the days of the Mongols' domination of Iran, is an example of a compensatory imagination through the themes of love and marriage. It is full of faith and stability, the reconciliation and oneness between the two sides, going beyond the lost sovereignty and authority of Iran in the Mongols over a wide geographical range from east to west. The research method is descriptive-analytical.

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There is a great accordance between Campbell’s mono myth and the archetype of hero’s journey in the epopee of “Mehro-mah”. Mah, Bedakhshan’s prince, has been invited to a journey by seeing a dream about Mehr who is the princess of Rome. King of Bedakhshan attempts to present that dream as an imagination and not real and avoid his son of going to that far land. However, the mendicant of Bedakhshan cave encourages Mahr to start his journey with mercury. In his journey, Mah encounters so many dangers and was able to overcome the examinations and finally marries Mehr. After getting together with his beloved, he feels reluctant to return to his home town. However, in one Spring celebration he suddenly remembers of his father and land. At the same time Khezr appears in front of him and informs him of his father’s death. The shocking news turns Mah in such a distressed condition that leads to his death. Later Mehr and other close friends of them also passed away and they were all buried in a garden which was later called “Rozatol-ahbab”.This essays tries to match the steps of hero’s journey to Campbell’s theory. The archetype of journey to which most of the hero’s journey can be matched has been founded by Josef Campbell based on Jung’s opinion. According to this theory the hero’s journey is constructed in three levels : 1.transformation 2.atonement 3.return. the main core of this theory is called mono myth.

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NIR Laser application in bacteria is often focused on mortality and antibiotic efficacy. The literature records on this point are absolutely diverse from mortality in different degrees to immortality and even viability enhancement. The aim of this study is to investigate 808 nm laser effects on E.coli-DH5α viability and Growth with CFU, MTT and FCM assays. To obtain the purpose, bacteria in LB media put on with 808nm laser on 100 and 200 J/cm² dosages and were investigated and compared by CFU, MTT and FCM assay. CFU assay results after 24 hours incubation were not significantly different between laser treatments and control. (P=0.06). In contrast, MTT assay results after 1 hours from laser treatment indicated significant deleterious effects in 200 J/cm² laser treatment compared with control(P=0.006). On the other hand, FCM assay results of laser treatments with using of PI and Triton X100 not only approved MTT assay results but also revealed some dose dependent changes on bacteria ranging from increase membrane permeability to lethal damages. As a conclusion of the results in these method assays, we can state that these different laser doses produce diverse effects on viability and growth in E.coli-DH5α. Consequently the laser treatments could be planned for antibiotic purposes or enhancing gene transformation process.

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The purpose of this research is to investigate the relative importance of Avicennia marina organic matter in the feeding of Ilisha melastoma fish in the Mangrove Biosphere Reserve; It was stable isotope approach. Three primary food sources including mangrove tree leaves, microphytobenthos and suspended organic particles were analyzed isotopically. The samples of primary food sources and fish are converted into pure and simple gases such as CO, CO2 and N2 after minimizing the size and turning into powder. Then the identified isotope ratios are compared with a measured standard and the exact amount of isotope formed in the sample is obtained. In this research, sampling was done seasonally in August in the summer season and February in the winter season of 2019 in the mangrove ecosystems of Bandar Khmer, Hormozgan province.In the summer season, the average stable carbon isotope of primary food sources fluctuated from -28.07 units per thousand for mangrove leaves to -13.58 units per thousand for microphytobenthos.This average in the winter season was obtained from -28.05 units per thousand for mangrove leaves to -13.54 units per thousand for microphytobenthos.The average stable nitrogen isotope of primary food sources in the summer season fluctuated from 1.44 units per thousand for microphytobenthos to 10.72 units per thousand for suspended organic particles.The results of this research showed that in the summer season, suspended organic particles with 63% and in the winter season, microphytobenthos with 45% play the most important role in providing the food needed by the small shemsk fish.
 

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In this paper, a novel four-variable refined theory of plate, called RPT, has been proposed for free vibration of composite laminated plates, using a hyperbolic sine function, for calculating out-of-plane shear strains. It is one of the properties of this theory that the boundary condition of zero shear stress is satisfied over upper layer and under lower layer of plate, with no reference to Timoshenko shape factor. In contrast to other higher-order shear deformation theories, in RPT theory, equations of motion are coupled dynamically only in inertial terms, while elastic energy terms are not coupled for the variables used. From this viewpoint, RPT theory is similar to classical plate theory (CLPT). Some of the objectives of this paper are the investigation of effect of influential parameters on fundamental frequency, such as modulus ratio, angle of plies, and plate length-to-thickness ratio. The results of this proposed version of RPT are compared and validated with those of first-order shear deformation theory (FSDT), higher-order shear deformation theory (HSDT), and the original version of RPT.

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In the present study, the motion and deformation of a red blood cell in the incompressible viscous flow is simulated using the lattice Boltzmann method combined with the immersed boundary method. The lattice Boltzmann method is used to solve the flow field, whereas the immersed boundary method is used to simulate the dynamics of the red blood cell. The red blood cell is considered as an elastic boundary immersed in the fluid domain. The main advantage of the lattice Boltzmann method is that it solves only an algebraic equation. In the immersed boundary method the fluid domain is descretized using a regular Eulerian grid, while the immersed boundary is represented in the Lagrangian coordinates. The Eulerian grid points would not necessarily coincide with the Lagrangian points. The fluid- immersed boundary interaction is modeled using an appropriate form of delta function. The effects of the no-slip condition are taken into account via a forcing term added to the Navier-Stokes Equations (here the lattice Boltzmann equation). In the present study, the tank-treading motion of a red blood cell in the viscous shear flow is simulated. The results are found to be in good agreement with the available experimental and numerical ones.

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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.

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Abstract
This study aims at extracting, classifying and analyzing the functions of describing the buildings in the novel “The Year of Turmoil” by Abbas Maroufi. Then it explores these functions in the formation of structure, as a result of its subsequent effects on the text and its relation with the reader. The findings of the study indicate that the architecture and the presence of buildings play the role as active elements in various dimensions of this novel. These functions can be categorized as follows: the realistic function of buildings in the story; the effect of buildings on the plot of the story; the role of buildings in space and scenery; the sympathetic and nostalgic effect of describing the buildings; the effect on developing characters and characterization; architecture; the regulative element of events and event; the identity-creator element of architecture. This case study not only examines the narrative style of such famous authors like Maroufi and the role of architecture in his works, but also it can unfold the relation between architecture and literature which is extensively represented in a Persian fiction.

Extended Abstract
This study aims at extracting, classifying and analyzing the functions of describing the buildings in the novel “The Year of Turmoil” by Abbas Maroufi. Then it explores these functions in the formation of structure, as a result of its subsequent effects on the text and its relation with the reader.
One of the materials utilized by storytellers is the architectural elements in the complex structure of the story. This usage has been manifested in various forms in narrative texts, including the creation of atmosphere, as an effective element in identifying or developing characters, and sometimes even as a component of the narrative plot and as an element of verification.
Architecture is widely used in Abbas Maroufi's novel “The Year of Turmoil”; therefore, it was chosen as a case to probe into the capacities and functions of describing buildings in Persian fiction. As exposing the codes and the elements of the intertwined structure of this novel with architecture is being discussed, the aim is to achieve a model to conduct a comprehensive research on the relationship between architecture and literature, a relationship which is overlooked by the researchers despite its significance.
This article is an interdisciplinary comparative study that analyzes atmosphere and architectural elements and their effect on the elements of the story using a qualitative and inductive method. To understand the function of describing the buildings in this work and consequently in fiction, first the types of buildings in various sorts of stories based on the relationship between the text and the real world were discussed: 1. using a real building in a real story; 2. using a real building in a fictional story; 3. using an imaginary building in a real story; and 4. using an imaginary building in a fictional story. According to this classification, the events, characters, and the buildings in “The Year of Turmoil” are all imaginary. Therefore, “Maroufi” is the omnipotent creator of the world of his narration, and thus, the architect of the buildings in this novel.
Based on the analysis, the functions of the description of the building and interior spaces in the novel “The Year of Turmoil” are as follows:
1. Using the building for verification by describing the exterior and interior spaces of the building to reflect the historical and cultural background of the assumed society and to imagine the events of the story as real by relying on the reader’s experience of the elements of the traditional atmosphere;
2. The effect of buildings on the plot of the story due to the effect of place and buildings on the causal relationship with other elements;
3. The role of buildings in creating atmosphere and crafting scenes; as the author in this novel, relying on his own spatial experience and also his reader’s, has made the sequence of the events understandable and accessible by depending on atmosphere creating and scene crafting and using buildings and architectural space;
4. Studying the influence on character development and characterization as in the relationship between the individual and the atmosphere in which they live or to which they react;
5. Influencing the reader by creating a sympathetic and nostalgic sense for a better understanding of the atmosphere and empathy with the characters of the novel;
6. Using descriptions, the author creates a relationship between events and atmosphere through a pattern of repetition of events, which is used to embed the critical points of the story, and using atmosphere as a place at which various and sometimes unusual events occur can be justified. Identifying the real place by using the building and imaginary events are also other functions of describing the building in this story.

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Odour emission has been an obstacle for the development of composting facilities. Composting is an environment friendly process which produces secondary pollutants. Ammonia is the most existing compound in these facilities; therefore Odour dispersion studies depended on geographic and metrological conditions of these kinds of places toward residential cities are required. Ammonia is a Tang, toxic, reactive and corrosive compound. Determination the place of landfills and composting facilities must concord with environmental laws; otherwise the blowing wind could transmit pollutants toward residential cities. Industrial source complex is the most common method for modeling of odour emission from volume and area sources. Kahrizak landfill is located in the south of Tehran with latitude and longitude of 51°20'39" E and 35°28'05" N. The amount of waste discharged to this landfill is about 7000 ton per day. A mathematical model for odour and ammonia emissions from Kahrizak landfill based on Gaussian fluctuating plume theory has been developed in this paper. Using the two-dimensional theory of dispersion, the odour emission from that landfill has been calculated. Since the Gaussian dispersion equation is used for point sources, this equation should be changed to determine the ammonia concentration emitted from volume sources. Virtual point method is used to consider this problem. The mathematical dispersion model is based on Pasquill Gifford and Gauss theory. By using meteorological data cumulated from Emam airport meteorological station, In Pasquill Gifford equations, dispersion parameters and emission equation were calculated. WRPLOT software was used to determine the wind direction and Land gem software was used to calculate the ammonia emission rate. The data needed for this software cumulated from Kahrizak waste management Organization of Tehran. Monin obokhov length and net radiation used for stability class specification. Radiation angle and topographic parameters effects were considered in these calculations The wind velocity and temperature were respectively about 3.6 m/s and 8.4°C.. Bowen ratio, albedo ratio and surface roughness of the site were respectively 1.5, 0.35 and 1. The stability class in the mentioned condition was calculated C. Results show that ammonia emission rate from this landfill and composting facility are respectively about 60 g/s and 103g/s. According to EPA reports these values are reasonable. Finally ammonia dispersion equation was solved by Matlab computing program. Maximum ammonia concentration is about 180mg/m3 when x, the distance, is 80 meters and He, effective height, is1.5 m. Emitted ammonia from Kahrizak landfill could transport toward 2kms from this landfill. Since the nearest residential city is about 8.1 km far away from this landfill, therefore there is not a serious problem threatening people who live there. In order to protect environment and people, It’s recommended not to build any residential, commercial or industrial organization about 2 km from here.

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Abstract In this paper, flow and scour pattern around submerged and attracting T head spur dike in a straight bend has been studied. For measuring 3D velocities and bed topography, Vectrino+ and Point gauge machines were utilized. 3D velocities were measured in rigid bed state. Flow pattern experiments were conducted in a way in which after installation of spur dike in their place the sediments of the bed were flattened and then the sediments around the spur dike were covered with a thin layer of cement grout using anairbrush. After 6 hours, once the cement grout dried, the experiments are initiated. During velocity record times no scour was observed. In this research, electrical current was plotted in lateral and horizontal plans and flow pattern was studied. The findings of this research showed that the maximum scour in attracting spur dike is stronger than that of repelling spur dike and in both states it occurs in the edge of upstream wing of spur dike. Besides, flow pattern results suggest presence of a separation plane in upstream spur dike where a part of flow acts as up flow and another part acts as down flow. Moreover, flow and scour pattern in lateral, vertical, and different other plans were presented in this research. Furthermore, the finding of this study revealed that dimensions of downstream scour hole for attracting spur dike are larger. The length of this hole for attracting and repelling spur dike is 3.8 and 3.1 times to the effective length of spur dike. This suggests stronger effect of attracting spur dike on downstream flow. Besides, the width of scour hole in repelling spur dike (4.2 times to the effective length of spur dike) was larger than that of attracting spur dike (5 times to the effective length of spur dike). The length of sediment ridge in the attracting spur dike, due to its stronger effect on its downstream area, was larger (20 times to the effective length of spur dike) than that of repelling spur dike (16.4 times to the effective length of spur dike). Moreover, through this research it was found that the down flow area in upstream spur dike in repelling spur dike is larger than that of the attracting spur dike - 0.77 and 1.4 times to the effective length of spur dike for attracting and repelling spur dike, respectively. This length corresponds with the vastness of down flow. Also, the length of circulation zone in downstream of attracting and repelling spur dikes were 3.8 and 3.1 times to the effective length of spur dike, respectively and this length is in consistent with length of scour hole in downstream spur dike in vicinity of the spur dike. Finally, through this research, it was found that the center of clockwise vortex developed in downstream of repelling spur dike, compared to the attracting spur dike, is closer to the spur dike and due to initiation of deposition in a distance closer to the spur dike in repelling spur dike.