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Author(s): 

GOLNABI H. | RAZANI M.

Issue Info: 
  • Year: 

    2005
  • Volume: 

    1
  • Issue: 

    1
  • Pages: 

    21-30
Measures: 
  • Citations: 

    0
  • Views: 

    325
  • Downloads: 

    132
Abstract: 

In this article, a model is used for the operation of a typical carbon nanotube actuator. Moreover, the related electromechanical coupling relations as well as the equations governing the actuation process are described. By solving such a system of equations numerically, important parameters such as the induced strain curve are investigated for different geometries. The deformation parameters for a zigzag (10, 0) CNT material are investigated. As a result, the transverse dimensional charge is increasing with the electron charge injection level while the longitudinal dimensional charge is negative that shows a shrink in the axial direction of the CNT material. The value of the torsional deformation is constant of zero for this Type of structure. The longitudinal, transverse, and torsional deformations for a chiral CNT fiber (of 10,2) are presented. As shown, both of the longitudinal and transverse dimensional charges are increasing with the doping percentage level while there is an expansion in the radial direction and a shrink in the axial direction of the CNT. The expansion in the radial direction for this Type of CNT is about 0.35% while for the axial direction the shrink is about 0.25% for the same level of electron charging. The torsional deformation for such a CNT material is about 0.45%. The effect of the bound length on the electro-mechanical factors is also studied. At the end, possible applications of such carbon nanotube materials for the actuator and sensing devices are discussed.    

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    6
  • Issue: 

    3
  • Pages: 

    73-81
Measures: 
  • Citations: 

    0
  • Views: 

    351
  • Downloads: 

    201
Abstract: 

American playwright, Eugene Gladstone O’Neill (1888-1953) is presenter of truth without comprising his beliefs. His works are dramatized by passion elements such as memories, dreams, and by awareness of forces. During mid-1920s he became interested in dramatizing complicated pattern of his family’s life. Mourning Becomes Electra, which opened on Oct.26, 1931, and had fourteen acts, was O' Neill's greatest masterpiece. In fact it is one of the most psychological works ever written in which all the characters resemble complexes introduced by great psychologist, Sigmund Freud. The power of irrational that is driven by the existence of subconscious and the role of instinct, repression, suppression, influence of parents and above of all, inhibition is the formation of personality and in adults are the causes of suffering according to the importance of sensual relationship which is based on their instinct. “Instinct is a continual internal stimulus, which produces specific satisfaction if it obtains sufficient response. (Freud 129).

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Issue Info: 
  • Year: 

    2016
  • Volume: 

    29
  • Issue: 

    1 (110)
  • Pages: 

    89-95
Measures: 
  • Citations: 

    0
  • Views: 

    961
  • Downloads: 

    0
Abstract: 

Paratuberculosis caused byMycobacterium avium subsp. paratuberculosis (Map) is a progressive, chronic and noncurable granulomatous enteritis. Paratuberculosis affects ruminants worldwide. The earliest reports on paratuberculosis in Iran date back to 1960’s when the disease was diagnosed in imported animals of the Abadan Oil Company’s farm. In the work presented here 13 field MAP isolates including 4 ovine and 3 caprine isolates from Isfahan, 6 bovine isolates from Zanjan and Alborz provinces plus 2 vaccinal strains of 316F and III & V were subjected to PCR-IS900, PCR-F57 for identification and also PCR-Collins for typing. In consequence, while an identical PCR protocol was successfully developed to simultaneously perform all the three experiments, the 15 tested bacteria were all shown to be MAP Type II (cattle Type). In epidemiological sense, when the size of national goat, sheep and cattle herds of Iran is taken into account, circulation of MAP Type II is intriguing.

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Journal: 

Research on Addiction

Issue Info: 
  • Year: 

    2019
  • Volume: 

    13
  • Issue: 

    53
  • Pages: 

    9-28
Measures: 
  • Citations: 

    0
  • Views: 

    978
  • Downloads: 

    0
Abstract: 

Objective Drug use has imposed enormous economic and social costs through its destructive effects on people's health and increasing crime in society. This can be detrimental to social welfare by affecting one's health. The purpose of this research is to model the impact of addiction on social welfare with an emphasis on health in Iran. Method The present study was a descriptive-analytical one and was a survey in terms of data collection. A researcher-made questionnaire was used. Statistical population included experts in crime and addiction economics (sample 10) and drug addicts supervised by Tehran addiction centers (sample 384). Results The results showed that economic, personal, cultural, social, political and psychological factors have a positive and significant effect on addiction, respectively. With each unit change in economic factors, welfare decreases by 0. 59 and welfare increases by 0. 73 by each unit change of health index. Conclusion The results of this study can be an important step in determining the priority factors and their effect on the prevalence of addiction and consequently preventing the negative effects of addiction on health and social welfare.

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Journal: 

GEOGRAPHICAL DATA

Issue Info: 
  • Year: 

    2024
  • Volume: 

    33
  • Issue: 

    129
  • Pages: 

    121-138
Measures: 
  • Citations: 

    0
  • Views: 

    25
  • Downloads: 

    0
Abstract: 

Extended AbstractIntroductionIn recent decades, cities have provided the prelude to widespread urban growth and development as the most important human settlements, due to the increasing degree of urbanization and the increase in urban population, which is one of the most important aspects of global transformation. In recent decades, following the growing expansion of urbanization and urbanization, as well as the continuous increase in population, many cities in the country have faced significant physical development, which has left planners and city managers with the problem of determining the right axes. And the boundaries of future physical growth of cities have faced. Maku is one of the cities that experienced an annual growth of 3.7 percent between 1996 and 2016, with a population of 46,581. Given the forecast of the increase in the population of the city in the coming years, the identification of suitable land for its physical development is an inevitable necessity. Several factors, including geomorphological features, climatic conditions, geological features, are effective in choosing the location of cities. The study evaluated the role of geomorphology as one of the factors influencing the location and physical development of the city of Maku.Materials and MethodsThe research method is of a descriptive-analytical Type with a functional purpose. In this study, raw data was collected through documented and field studies. This study examines the geomorphological factors influencing the physical-physical development of the city of Maku. To evaluate the optimal development of urban land, the components of lithology, soil, slope, distance from the river, direction of slope, height, land use, distance from fault and Road in the area of the surrounding city of Maku were used. To analyze data and select the optimal location, a combination of two phase - electro and Shannon entropy models has been used. To prepare the ground fit layer, the layers in question are standardized and phased in the ArcGis environment using the Phase model and by the calculator instrument and in the form of a raster in the form of a value of zero to one. Finally, the coating of layers using phase logic (gamma) to optimize the development of the city of Maku was determined, and then the development path of the city of Maku was classified into five groups: completely appropriate, relatively appropriate, appropriate, inappropriate and very inappropriate.DiscussionAfter determining the effective criteria in locating and detecting the weight of the criteria, the information layers should be combined with the appropriate method. The composition of the map is obtained by overlapping weighted maps. Merging and combining different spatial layers from different sources together is the main goal of GIS projects and its unique feature, so that the interactions are described and analyzed with the help of predictive models to support decision-makers. The final map of the development potential of the city of Maku was prepared by combining different layers of information and classified according to the Likert scale. In this classification, land was considered suitable for urban development in 5 groups of lands with very low, low, medium, high and very high development potential. According to the above map, most of the city's immediate land is located in the eastern and western parts of the city for Urban Development. The southern and northern lands of the kalbdi District of Maku are also small or very small for the future development of the city. The proximity to the epicenter of earthquakes, the short distance from the river and the location of the flood path are the main reasons for the inadequacy of the above land for the physical development of the city of Maku. The lands located east and West at the entrance of the city from the shout and merchant side are the only immediate areas of the city that are very suitable for the future development of the city.ConclusionAmong the seven geomorphological factors studied, the two factors "altitude" and "lithology" are the highest coefficients of importance, and the factors "slope direction" and "distance from the river" are also the least important. The results of comparative analysis of the eight geographical directions in terms of geomorphological factors also show that in terms of the litholysis factor, the east, west and northwest directions are more desirable compared to other options. In terms of the elevation factor, the Northeast and East Directions are more suitable, and in terms of the distance factor, the West and northwest directions are more preferred. Comparing options in terms of soil factor also indicates a greater favorability of the Northeast and northwest directions. Distance from the river was another component that, based on the analyses, the East and Southeast directions, identified more favorable areas for urban development in terms of this component; and finally, in terms of the slope direction criterion, the lands located in the southeast of the City face greater desirability. After determining the coefficient of importance of the criteria and the relative score of the options in terms of each of the factors studied the coefficients of importance of the criteria and the relative weight of the options were calculated within the framework of the method of the process of hierarchical analysis of the integration and score of each of the eight geographical directions as follows the East was calculated with a gradient of 5 West 5 southwest 1 northeast 2 North 0 south 0 Southeast 4 Northwest 0 thus in terms of geomorphological factors the study word in the ین research orientations east west and the southeast is proposed as a priority for the future development of the city of Maku.

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Author(s): 

Journal: 

Journal of Heart

Issue Info: 
  • Year: 

    0
  • Volume: 

    95
  • Issue: 

    -
  • Pages: 

    1343-1349
Measures: 
  • Citations: 

    1
  • Views: 

    212
  • Downloads: 

    0
Keywords: 
Abstract: 

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Issue Info: 
  • Year: 

    2021
  • Volume: 

    12
  • Issue: 

    4
  • Pages: 

    90-93
Measures: 
  • Citations: 

    0
  • Views: 

    168
  • Downloads: 

    0
Abstract: 

Introduction: Tyrosinemia is a congenital metabolic disease in which the breakdown of the amino acid tyrosine is reduced and its amount is increased in the body. Tyrosine metabolites can involve specific organs that according to the clinical manifestations there are three Types of this disease. Case: This article reports Type 1 tyrosinemia in a 2-year-old child who complained of urinary problem and restlessness. Despite the absence of pathological findings in fetal ultrasound screening, imaging findings indicate involvement of both kidneys. Conclusions: It is a rare, inherited and metabolic disease that despite the challenges of diagnosis has simple cure.

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Author(s): 

YAJAM S. | GHALAMGHASH J.

Journal: 

GEOSCIENCES

Issue Info: 
  • Year: 

    2020
  • Volume: 

    29
  • Issue: 

    114
  • Pages: 

    221-230
Measures: 
  • Citations: 

    0
  • Views: 

    697
  • Downloads: 

    0
Abstract: 

he east Sanadaj-Galali plutons of the northern Sanandaj-Sirjan Zone, Zagros Orogeny, are composite, polyphase bodies that generated during subduction ofNeotethys beneath the Eurasian plate. A-Type magmatism in this area presents by Alkaline, high K, ferroan leucogranites. Despite having mineralogical and isotopic similarities, these leucogranites show a clear division, based on the geochemical and SHRIMP zircon crystal dating results. Qalaylan leucogranite with the crystallization age of 159 ± 3Ma is Al-Type. Other leucogranites are A2-Type and crystalized about 20 million years later (140-149 Ma). In fact, mantle derived mafic magma, as heat source, caused partial melting of heterogeneous pre­ fertilized Sanadaj-Sirjan basement and creates Qalaylan leucogranites. Younger leucogranites are A2-Type and present different evolution path. These rocks generate in a post collisional setting as a result of partial melting of heterogeneous pre-fertilized Sanadaj-Sirjan basement, about 20 Ma later. In post collisional setting, asthenosphere upwelling do to the slab roll back or slab steepening could be a heat source of crust melting and generates the younger leucogranites.

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Author(s): 

SABOURI A. | ASLANKHANY A.

Issue Info: 
  • Year: 

    2003
  • Volume: 

    14
  • Issue: 

    4 (43)
  • Pages: 

    109-121
Measures: 
  • Citations: 

    0
  • Views: 

    865
  • Downloads: 

    0
Abstract: 

Improved dental stone has been widely used for producing dies for the fabrication of restorations with the lost-wax technique. Improved dental stone is used for several reasons, most often because of its reasonable cost, ease of the use, and ability to produce consistent results. The purpose this study was to compare the dimensional accuracy of dies made three Type IV die stones. A metal master model, containing 2 complete crown fixed partial denture (FPD) abutment preparations, was fabricated. Three die stones were compared Ultra rock, SH074 and Begostone. Ten master casts were fabricated for each die material from a master metal model using conventional prosthodontics laboratory techniques. A mean measurement and percent relative change for each dimension was calculated. One-way ANOVA revealed that significant differences existed among the materials. Tukey's multiple comparisons testing ranked the dies as follows: from largest to smallest; SH074, Ultrarock, Begostone, Maste model. Begostone die material had the least mean dimensional change from the master model.

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Journal: 

BINA

Issue Info: 
  • Year: 

    2018
  • Volume: 

    23
  • Issue: 

    4
  • Pages: 

    242-247
Measures: 
  • Citations: 

    0
  • Views: 

    1094
  • Downloads: 

    0
Abstract: 

Purpose: To evaluate the efficacy of intravitreal bevacizumab for the treatment of Type 1 retinopathy of prematurity (ROP) in zone I. Methods: Preterm infants with Type 1 ROP in zone I (zone I ROP, any stage with plus disease or zone I ROP, stage 3 without plus disease) were enrolled in this prospective study. Intravitreal bevacizumab (0. 625 mg/0. 025 ml) was injected under topical anesthesia. The patients were followed-up weekly for 4 weeks and, then, biweekly till 90 weeks gestational age. Results: Seventy eyes of 35 patients with Type 1 ROP in zone I were enrolled. At a gestational age of 90 weeks, ROP regressed with complete or near􀀀 complete peripheral retinal vascularization, in 82. 9% of eyes after a single injection and in 92. 9% of eyes after up to two injections. In 5 eyes (7. 1%), ROP progressed to stage 4B or 5, so that surgical management was required. There were no major complications such as endophthalmitis, cataract, or vitreous hemorrhage after injection. Conclusion: Intravitreal bevacizumab injection is an effective method for the management of patients with Zone I ROP requiring treatment; however, some cases may progress to more advanced stages and require surgical management. Close monitoring for recurrence or progression is necessary. Eyes with persistent zone I ROP may progress to advanced stages when treated with intravitreal bevacizumab injection and re􀀀 treatment may be needed.

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