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Volume 5, Issue 3 (2015 2015)
Abstract

Tourism industry is one the most successful industries of the world in in perspective of gaining income. Gaining of plenteous currency incomes, extension of cultural scientific relations, creating occupations directly and indirectly and representation of country›s security and stability are considered among consequences and achievements of its extension in every country. In today competitive world, various countries, with introducing their touristic graces try to improve their economic status. One of various kinds of tourism which is recently introduced is Geotourism. This word is an intercourse term composed from two words geo with the meaning of earth and tourism. Geotourism is a particular form of tourism industry in which geological tourism is the focus of attention. Experts collectively agree on this matter that Geotourism creates a great potential for many regions which don’t have touristic prosperity. Geotourism industry was formally born in the world in 1955. About 150 to 200 years ago in England, Adam Sedvic for the first time provided geology tours for those who were interested. Lifetime of Woodvardin University museum returns to 1728, this is the first public museum dedicated to applied geology in geology organization which is outfitted with tools of geology interpretation since that date. In midst 1990s Geotourism was increasingly discussed and studied among tourism industry, politicians, advocates of environment protection, geographers, geologists and similar scientific assemblies. Leaders of Geotourism in the world were those who had intercourse studies and activities. For example, Dr. Thomas E. House well known with English name House was the first one in the world who after Adam Sedvic provided an academic definition for Geotourism in 1995 and in this definition has introduced Geotourism something above aesthetical attitude to geological phenomena. Another world leader is professor Russ Kingston Dowling who has many books in various grounds of tourism, ecotourism and finally Geotourism and this is while purely geological attitude to Geotourism in most cases is confined to geo diversity studies and takes the scholar away from contents of geological interpretations and intercourse and multicourse studies of tourism. In 2006, Russ Kingston Dowling and David Newsum in (universal) Geotourism book by extensive drafting of attention to geological tourism, provided a logical answer to Jonathan Tortolut 3 from national geography magazine of America (2012) who simply believes that visiting of all historical –cultural – natural heritages (so that helps stable development and local societies) is Geotourism. In Iran, many students and scholars have worked for introducing Geotourism. One year after Mohammadhasan Nabavi suggestion in 1378 in eighteenth seminar of geology regarding identification of beauties of country›s earth, the work of identifying beauties and geology diversity of the country began. After that in 2006, Alireza Amri Kazemi and Abbas Mehrpouya entered a list of Iran geological diversity to fifth chapter of Geotourism book written by Ross Dowling and David Newsum. Many specialized studies have been performed about surveying of mineral and thermal springs in Iran but lees work is done on touristic aspects of theses springs. Therefore, providing a method for evaluation of touristic value of thermal springs as an important Geotourism in our country is a task which is not surveyed. In this study, a method for evaluation of Geotourism value is offered based on modified Pralong method. For reaching to the score of spring tourism beauty, scientific, cultural, efficiency and economical scales have been investigated in the format of Pralong model. Since Pralong model only notes scales and subscales of tourism score, it has been modified using experts› views. This method addresses evaluation of tourism scaleand place efficiency scale. Its tourism scale can be analyzed and assessed from four aspects: outward beauty, scientific, cultural – historical and social – economical. Tourism scale of a place is obtained from average of these four scale and weight of any of aspects of tourism scale is not more or less than others. Place outward beauty scale addresses its visual and spectacular aspects. Scientific scale is assessed based on criterions like scarcity and didactic position. In evaluation of cultural scale artistic aspects and cultural conventions of the place are emphasized and finally, economic value of each place depends on its exploitable characteristics and Entrepreneurship in the ground of tourism and recreation. In Pralong method, scales and subscales have equal weight in relation to each other, while in multi scale decision making methods usually weight of scales and subscales are different. Especially in the debate of Iran Geotourism equating of these scales won›t entail correct results. Since weight determination was a difficult task, people were asked to categorize scales in precedence order and then regarding to precedence, scales and subscales were weighed. For weighing the following formula was used. In this formula, Wi is i th scale weight and Ri precedence of scale i and n is the number of scales. With several rounds of field study and attendance in the region and obtained raw data, scores of scales were calculated according to tables 4 to 9 with two methods of Pralong and modified Pralong. These numbers show the tourism scale of region as 0.379 in Pralong method and 0.441 in modified Pralong. These numbers are indicative of a favorable status in understudy region in respect of creating touristic recreational facilities for developing a geotouristic system. Of course, %16 growth of modified Pralong score shows more attention to this region regarding to Iranian reporters point of view toward Mr. Pralong view, so that even in its neighborhood another system for creating a geo park is notable (figure 6). But despite the regions potential capabilities, the level and quality of efficiency was evaluated low. Of course regarding to weights of modified Pralong method, this level with %37 growth is in high intermediate category which shows lower efficiency expectancy level of Iranian society than Mr. Pralong method. Then, still some tasks should be done for increasing efficiency quality of this spring and despite implementation of the design of country›s water therapy development and provision of universal design of Joshan hot water by Oghaf organization, effective measurements have not yet been performed for right exploitation of the region. Joshan hot water spring due to closeness to center of province, possessing therapeutic attribute, existence of novel geomorphological and geological perspectives and appropriate weather condition in case of observation of stable tourism principle, decentralization and budget assignment, development of infrastructural, sanitarian, residential and recreational facilities and exertion of service and facility standards can turn to one of the greatest hydrotherapy centers in southeast of the country. One of advantages of the method offered in this study is the calculation of development effect of each of mentioned facilities in increasing the level of tourism score of this Geotourism. Even with evaluation of this method, we can have a comparison between various places in relation with each other for other Geotourism regions of the province.

Volume 19, Issue 1 (5-2019)
Abstract

In the present study, discrete element method is used to simulate undrained two-dimensional behavior of soil samples containing polygonal particles. Two methods of constant volume and cylinder were used for numerical simulation of undrained behavior and the results from these two methods were compared. In the cylinder method, it is assumed that there are channels among adjacent pores and the possibility of water exchange among the centers of the pores is provided. In this method, the diameter of the cylinder represents the permeability of the soil. In the constant volume method, it is assumed that the sample volume stays constant during loading. The simulations were done by using both methods. The samples were initially subjected to confining pressure of 200 kPa and after consolidation, they were loaded under deviatoric stress. The results showed that the output obtained by the cylinder method are in good agreement with the constant volume method, and by increasing the stiffness of the water, the results of both methods are closer to each other. Then, the undrained behavior was investigated by using cylinder method in terms of shear strength and pore water pressure in a sand sample at the confining pressures of 200, 400, 800 and 1600 kPa. The trend obtained from the simulation results is in good agreement with laboratory results such that with bigger confining pressure, the shear strength and the positive pore pressure are bigger too, but by increasing confining pressure, the amount of pore pressure decreases in the specimen. The pore pressure distribution contour at the strains of 10% and 30% was presented by means of cylinder method and the effect of cylinder diameter changes on the pore pressure distribution contour was investigated. By investigating the pore pressure distribution contour at the strains of 10% and 30%, it was shown that pore pressure in the sample center has the lowest value. In addition, it was seen that by increasing the cylinder diameter, the variation of pore pressure among the voids becomes smaller, which indicates the uniformity of the pore pressure in permeable soils. By reducing the diameter of the cylinder, the variation of pore pressure becomes more through the sample.
 

Volume 23, Issue 5 (May 2023)
Abstract

Fused deposition modeling (FDM) is one of the most common 3D printings technologies. Low cost and the ability to produce models using wide range of thermoplastic polymers, makes this process suitable for rapid prototyping and manufacturing some commercial parts. The manufacturing complicated parts and increasing their qualities are possible, using more than three degrees of freedom printers. In this paper, a 5-DOF 3D printer is introduced. The mechanism of this printer is 4-DOF parallel mechanism with one additional degree of freedom resulting from rotation of printer bed about Z-axis. In order to generate tool path for 5-DOF printer, a CAM software was developed with python. For controlling the printer, control software was designed based on open-source Repetier framework. Since original framework only supports 3-axis printers, source code needed to be changed such as extending source code to support 5-axis and adding mechanism inverse kinematics. By using this 5-Dof mechanism, the prints of complicated parts without using the support are possible.
 

Volume 24, Issue 1 (Spring 2020)
Abstract

Introduction
 Population growth and migration of (from or to) cities has led to the construction of unstructured and large changes in the spatial structure and expansion of cities. This causes changes in the surface of the earth and the conversion of natural effects of the earth such as soil and vegetation to the urban texture. So, the first consequence of the expansion of cities is land use change. Today, land use change and land cover have become a major challenge in many countries. Hence, the study of these changes plays a major role in the world's environmental studies. In order to better manage natural and human ecosystems and develop long-term planning, it is necessary to model land use changes and predict future changes.
Methodology
The research method is applied in terms of purpose and  the nature and method of descriptive-analytic research, and the method of data collection in this study is also a library research. In this study, for land use changes during the 29-year period, images were first provided  from the website of the Geological Survey of the United States. Then, using ENVI software, the pre-processing operation was performed to apply atmospheric and radiometric corrections. Also, the specimens of educational and supervised classification of images for land use in four levels (lands, rice field, forests, gardens and Water zone) were studied. Then, in the IDRISI SELVA software, simulation was used to predict future changes using the perceptron neural network.
Results and Discussion
Before the main analysis of the data and the extraction of the information, it is necessary to perform the pre-processing operation. Then several time satellite images used in the research after atmospheric and radiometric corrections were used to prepare the land use map and Maximum likelihood algorithm was used to classify the desired classes. The selection of effective variables in predicting urban growth is an important and useful information for the user to understand the desirability of land use change. Therefore, in the present study, distance variables from the road are considered as independent static variables, and distance from the landfill, distance from the land, and the distance from the forest and gardens are considered as independent variables were used. Among the models that are used in the simulation of land use change, neural networks are multilayered perceptron. Therefore, this model was used to simulate land use changes in this study. Finally, according to the Kramer coefficient, the distance from the road has the least effect and the distance variable of the land has the greatest impact on land use change and transmission potential modeling. Then, user-potential mapping maps were generated through multi-layer perceptron neural networks for an 8-year time span. Also, in the maps produced, regions with a warm color spectrum have the greatest potential for change, and are more vulnerable to areas with a cool color spectrum.
Conclusion
Today, land use change and land cover have become a major challenge in many countries. These changes have a direct impact on environmental components such as soil, water and atmosphere. Which This causes changes in the surface of the earth and the conversion of natural effects of the earth such as soil and vegetation to the urban texture. Due to the fact that the city of Lahijan, like many other cities in Iran, has faced expansion of construction in recent years, so, today, the city has undergone significant changes in land use. The purpose of this study is to model and predict land use changes using the Multilayer Perceptron, . In this regard, in order to implement this model, Landsat classified satellite images for the four periods of 1989, 2000, 2010 and 2018, as well as four independent variables including distance from the road, distance from Shalizar, distance from the forest and gardens, And and distance from the land, were built to simulate land use changes. The study resulted in the generation of transmission potential mapping with the 84.58 accuracy index, which shows that the distance from the land constructed  the greatest impact and the distance from the road has the least effect on land use change variations.

 


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