seyedhamidreza hosseini

In the latest history of the past century, with a title that tells of the antiquities of Zianbar, which is located on the roof of Ab Zarzamini, a place of research and recitation of the mosques of Bushra Boudah, there is a question in the context of tightening everything else. There are no regional changes, Niyazmand has found a solution. This is scientific and consecutive, and writing down different scenarios for the sake of confrontation with possible conditions, such as those with two weak meters, and economic and social conditions. Dasht Shahryar, this is forbidden and it is forbidden. This is a time of year, technology and technology, various aspects of the dismantling of the COMSOL system, and the introduction of technology and technology to 22 points in the selected area of my reading area over the years 1382-98, accounting, and so on. If you are healthy, you will have a good balance 1410 Guess more. There was a lot of effort to find a hotel outside the city, between the front lines of Tehran-Shahriyar, around the 1410s, and outside the Rosh Sunaryonisi building, next to the city of Tehran. His faith and good faith), from a political perspective and direction This is the first step in the area of the sources and drains of the father of his opinions. The result of the whole thing is: changes in blood pressure and sex, among other factors, affecting the sexual intercourse and the sex of the body and body.

The phenomenon of subsidence is one of the geological hazards, which is mostly created and aggravated by human and natural activities such as long-term extraction of underground sources of water, oil and gas or the extraction of minerals from mines and the dissolution of subsurface formations and the collapse of karst. turns Shahryar plain is one of the forbidden and critical plains of the country, which is also active in terms of industry and agriculture, this plain has been affected by land subsidence for the past several years. In this research, in order to analyze, investigate and predict the subsidence rate, the poroelasticity flow module was used in COMSOL software, which can determine the changes in the thickness of the soil sedimentary layer due to groundwater loss and also in the coming years. He nosed.

In this research, by coupling Darcy's law and changing the soil skeleton by COMSOL software, it was tried to calculate the subsidence in 22 selected points of the study area during the years 2003-2019 and after verifying and obtaining a high agreement with real data and images. Radar interferometry estimated the amount of subsidence until 2031.

The general result of finite element numerical modeling showed that the subsidence rate of the area during the year 2031 was estimated at 12.8 cm and at critical points 20.98 cm. Therefore, the maximum settlement caused by the drop in the underground water level in the early years appeared at a higher rate in the upper layer of the aquifer, which over time after filling the voids between the soil particles and due to the hydraulic connection between the layers It is observed at a slower rate than in the past in the upper layers of the aquifer surface and the ground surface. Therefore, changes in the groundwater level, soil type and distance from the fault have also been among the factors affecting the subsidence pattern and rate.

Indiscriminate extraction of underground water sources causes a drop in the water level and an increase in the stress on the soil particles, which leads to the subsidence of the earth's surface. Shahryar's critical plain has been affected by the phenomenon of subsidence for the past few years. The existence of vital arteries, economic, pilgrimage and military areas has turned it into a strategic area, which doubles the cost of the harmful consequences of subsidence. In this research, a new method is used to predict and analyze subsidence, under the title of Poroelasticity module of COMSOL software, which uses the simultaneous solution of equations related to fluid movement in porous media and mechanical deformation. The output of the numerical model was validated and compared between 2003 and 2019 at 24 points with the alignment observations, the Sentinel 1 radar interferometric images. The correlation coefficient of 0.97 indicates an acceptable correlation between the data values, the good matching of the interferometric images with the maps of the subsidence zones obtained from the software data and the approach of the squared values of the mean squared error and the efficiency coefficient towards zero and one was obtained. The general result of the finite element numerical modeling showed that the average rate of subsidence during the year 2031 due to the successive compression of the upper layers of the aquifer, with a lower rate, about 13.19 cm and in the places where the thickness of the fine-grained layers increased, He finds that it will reach 18.38 cm. Also, the range of changes in the underground water level in the period of time, the type of land and the number of geological units are among the factors affecting the subsidence pattern and rate.

According to previous researches, worker's participation in issues affecting their working condition is the key to success in ergonomics interventions in working environments. Therefore, the present study was performed to increase active particapitation of supervisors in production line and also to identify and assess ergonomics risks and presenting modification actions (Kaizen) by themselves in Pars Khodro automobile manufacturing company. A manual regarding lifting objects and body postures, according to the Finish evaluation method, was provided for supervisors in production line and related trainings were presented to them. Then, they were asked to insert the results of their assessments and suggestions in special forms during one year. The presented assessments and suggestions were examined by ergonomics experts. According to the assessments conducted by supervisors, 26 work stations had high ergonomics risks, 51 had ergonomics risks with an average level, and 45 had low ergonomics risks. Moreover, the number of required Kaizens presented by supervisors was increased from 18 cases in the first year to 42 cases in the second year, after implementation of ergonomics training and identifying and assessing ergonomic risks by supervisors. Empowering and training supervisors increased worker's participation. In case of adequate training, supervisors can present practical solutions to reduce ergonomics risks in their workstations.