Showing 4 results for Fahimi Far
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.
Maryam Narimi, Asghar Fahimi Far, Ebrahim Khodayar,
Volume 12, Issue 47 (Fall 2019)
Abstract
Any discourse constitutes of several propositions and discursive formations that are created by focusing on the political, cultural and social conditions of each era. During the rule of Fath- Ali Shah Qajar (1772- 1834), the dominate literary review discourse; which is considered the very traditional discourse, was formed based o the perception system that was governing an era in which, the royal court was recognized as the producing institute of the mentioned discourse. The main purpose of this study is to investigate the role of the literary discourse of return in images specific to Fath Ali Shah Qajar with regard to the political, social, epistemic contexts and the system of knowledge or spirit of the time.
If we admit that until then, Iranian painting and Persian literature have been more or less intertwined; it must be said that as the literary discourse of this period was formed, visual norms in FathAli Shah’s portraits also changed and new features emerged that were not unprecedented in past centuries. In the present study, the authors have attempted to examine how literary discourse led to the formation and influence of king's icons in court, based on Michel Foucault's theory of discourse as a methodological model and an interdisciplinary approach.Studies show that during this period poetry and poetic descriptions continued to be a source of inspiration for painters.Therefore the images of the King became more unrealistic and his aura of holiness grew larger. The king's body also became more intangible and metaphorical.
Volume 20, Issue 4 (11-2020)
Abstract
Given that terrorist operations have increased in recent decades, it is therefore necessary to confront the dangers of this phenomenon. The explosions can cause severe damage to buildings and cause the progressive and complete destruction of these structures. Blast stresses are one of the most destructive loads which a structure may experience. Many of the existing structures are vulnerable to loads caused by the blast wave, so their resistance to such loads should be investigated to identify critical points of structures. In the meantime, bridges are considered as the vital available structures for terrorist operations, but with respect to their importance, solutions must be provided to reduce the vulnerability of bridges subjected to explosive loads. This paper investigates the behavior of bridge under blast loads in different weights and distances. Several experiments samples have been modeled and analyzed under blast loads for validating the results at finite element ABAQUS software, and the analyses showed that this software is able to predict the behavior of studied systems under blast loads. In this case, a bridge that has been located in Tehran, Shahid Sanie' Khani bridge, was chosen and investigated by utilizing ABAQUS. This bridge was subjected to blast loading substance, TNT, in different weights of 45.4, 100, and 150 kg and in different distances of 0.5, 1.2, 1.83, 2.54, and 3.83 meters from the center area of the bridge’s slab. Additionally, a new system U-boot named was added to the initial model for investigating its influences under blast loading. To conclude, firstly, increasing the amount of exploding substance (in a fixed distance from the center of the slab) cause an increase in the slab displacement and subsequently the damage in the slab is being increased. Secondly, increasing the exploding substance from the center of the slab and assuming a fixed weight for it in both first and second cases showed that increase in the amount of distance could lead to decreasing the displacement in slab and subsequently the damages decreases. Finally, adding the U-boot system leads to incredible improvement in the whole model in comparison with the initial one.
Volume 23, Issue 5 (11-2023)
Abstract
One of the active areas of research in concrete structure health monitoring is the detection of cracking in structural elements. Image classification and diagnosis have attracted the attention of many researchers nowadays. Due to the advancement of artificial neural networks and their fast processing, a convolution neural network has been established to detect these cracks. In this study, crack detection in concrete structures has been studied using a convolutional neural network, which can be generalized to all concrete structures for example dams, canals, bridges, shells, road infrastructure, foundations and concrete frames. Convolution neural network training was performed by the SGDM method with the ReLU activator function. Also, 250 iterations were employed for convolution neural network training, which gradually reduced the error rate and increased the accuracy of detecting cracked and uneaten concrete. The convolutional neural network is trained and validated with these 250 iterations. First, images with 32-pixel window dimensions are converted and separated. Then, the 32-pixel window, the 16-pixel, and the 8-pixel windows filter the images. A total of 3 stages of 32, 16, and 8-pixel filter images are analyzed and interpreted. During the training process, validation is performed every 20 iterations, and a diagram related to the accuracy of convolution network estimation and data classification error is drawn and completed. In convolutional neural networks, where the output is in pairs, the cracked and uncracked images of the network architecture are almost identical, differing only in minor specifications. The database of this research includes 20,000 images of cracked concrete and 20,000 uncracked concrete with dimensions of 3×227×227 pixels, 80% of it is used for training and the remaining 20% is used for validation of the convolution neural network. The accuracy of distinguishing cracked concrete from uncracked ones is about 98.16%, which is acceptable for operation and is considered practical. To evaluate the accuracy and performance of the proposed algorithm, each classification was performed against the overall accuracy, the confusion matrix was used for the validation data. According to the clutter matrix, 3861 images, in other words, 48.3% have been predicted to be correctly cracked, and 3992 images, equivalent to 49.9%, have been predicted to be correctly uncracked, and a total of 147 incorrect images have been predicted, which is equivalent to 1.8 percent. Images that are cracked and not accidentally cracked are predicted. They had crack lines in the corner of the image or cracks with a very small width, which the proposed convolutional neural network was mistaken for due to a very small crack width or crack position. Also, the results of the present study showed that the accuracy of this research has the best accuracy in less analysis time compared to previous studies. It should be noted that this method and its associated database can be used to produce a crack detection application on a smartphone, to be able to make a good initial estimate of the structure in question, such as a bridge or building after an unusual loading event, such as an earthquake or explosion.