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Search Results: 1 - 10 of 164 matches for " Payam Mahasti "
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An Inquiry into Cultural Continuity and Change in Housing: An Iranian Perspective  [PDF]
Rafooneh Mokhtarshahi Sani, Payam Mahasti
Sociology Mind (SM) , 2013, DOI: 10.4236/sm.2013.33031
Abstract:

The arrival of modernization has had an adverse effect on current Iranian housing architecture; as such, that it is now finds itself in a difficult predicament. Therefore, various national architectural conferences, in addition to individual investigations, have been focused on the renewal of Iranian housing architecture over recent decades. Whilst these examples have not culminated or resulted in defining a clear Iranian trend and style in housing with recognizable characteristics, it would be useful to explore some of the more successful examples in order to obtain an overview of what has been done in Iran in this respect during recent years. Accordingly, the study has focused on identifying the architectural characteristics of Iranian houses, which have been modified and used in the present designs. In this study, through a comparative typological analysis of the different traditional Iranian housing types, their main characteristics have been categorized. The categorization later applied for the analysis of the contemporary houses designs. The results of this investigation have shown that, in contemporary samples, although the idea of Iranian traditional houses has remained; the concept of traditional houses has been altered and changed.

Health Related Life Style Among the Iranian Medical Students
Mahasti Alizadeh,Kamyar Ghabili
Research Journal of Biological Sciences , 2012,
Abstract: According to the definition of World Health Organization (WHO), life style is the method of life built on specific behavioral patterns. We performed a survey among a group of Iranian medical students to identify their health related life style. A cross sectional study was performed by using the questionnaire. In this process, three-hundred out of all 800 medical students who have entered the medical faculty of Tabriz Medical University, Iran during 1998 and 2004 participated in the survey. The questions were designed based on the health behaviors among the medical students. Approximately 14% of all respondents reported that they used tobacco. Fifty eight percent of smokers resided in the students dormitory. Half of the smokers declared that they smoke less than 5 cigarettes a day while 16.7% smoked more than fifteen cigarettes per day. Thirteen percent of the students drink alcoholic beverages. Furthermore, 50% of the students declared the ages of 19-22 as the age of first alcohol intake. Approximately 59% said that they eat food regularly at all the three main meals. Also 45.5% of females and 54.5% of males eat junk foods more than 5 times a week. Nearly 67% of the women and 33% of men eat fruit and vegetables more than 4 servings a week. Exercise was more frequent in the lower year medical students. This study demonstrated that unhealthy behaviors are increasing among the medical students; however Iranian medical students unhealthy habits are lesser than those of university students assessed in America and European countries.
Health Related Life Style Among the Iranian Medical Students
Mahasti Alizadeh,Kamyar Ghabili
Research Journal of Biological Sciences , 2008,
Abstract: According to the definition of World Health Organization (WHO), life style is the method of life built on specific behavioral patterns. We performed a survey among a group of Iranian medical students to identify their health related life style. A cross sectional study was performed by using the questionnaire. In this process, three-hundred out of all 800 medical students who have entered the medical faculty of Tabriz Medical University, Iran during 1998 and 2004 participated in the survey. The questions were designed based on the health behaviors among the medical students. Approximately 14% of all respondents reported that they used tobacco. Fifty eight percent of smokers resided in the students dormitory. Half of the smokers declared that they smoke less than 5 cigarettes a day while 16.7% smoked more than fifteen cigarettes per day. Thirteen percent of the students drink alcoholic beverages. Furthermore, 50% of the students declared the ages of 19-22 as the age of first alcohol intake. Approximately 59% said that they eat food regularly at all the three main meals. Also 45.5% of females and 54.5% of males eat junk foods more than 5 times a week. Nearly 67% of the women and 33% of men eat fruit and vegetables more than 4 servings a week. Exercise was more frequent in the lower year medical students. This study demonstrated that unhealthy behaviors are increasing among the medical students; however Iranian medical students` unhealthy habits are lesser than those of university students assessed in America and European countries.
Assessment of CropWat Model Accuracy for Estimating Potential Evapotranspiration in Arid and Semi-arid Region of Iran
Payam Najafi
Pakistan Journal of Biological Sciences , 2007,
Abstract: The aim of this research was estimating the accuracy of CropWat software to calculating potential evapotranspiration (ET0) in arid and semi-arid region of Iran. For this purpose, 9 locations of arid and semi-arid regions of Iran selected and the grass lysimeter data collected too. The lysimeter data are collected duration of May through November during 1988-1997. For the comparisons of the ET0 lysimeter data and ET0 resulted CropWat software in different point, three statistical parameters were used include Mean Absolute Relative Error (MARE), Root Mean Square Difference (RMSD) and correlation coefficient (R2). The results of this research show that the average of MARE, RMSD and R2 computed about 31%, 2.3 and 0.7, respectively in the study areas. In addition, the results of this research show that when the average of wind speed was less than 1 m sec-1 or wind speed was more than 1 m sec-1 with low ET0 lysimeter (ET0 less than 6 mm per day), CropWat has a low sensitive for estimating ET0 and it's necessary to improve the results for these areas. In concluded, the results of this research were showed that in these area because of intensive temperature and solar radiation, CropWat can not be estimated ET0 exactly.
The Realm of Management in Radiology: What Are the Borders?
Payam Tarighi
Iranian Journal of Radiology , 2010,
Abstract: If we carefully think about "management", there is little space in our life far from its influence. We feel the presence of management in every decision, from the most personalized matters to world-wide issues. In an interesting general model, there are four categories for management levels: managing yourself, managing people, managing the organization and finally, managing the society. So we need management as a scientific key for dealing with challenges in every category Challenges facing the medical imaging industry are numerous, such as handling daily changing technologies, managing resources (human and financial) for providing high competitive cost-effective consumer-satisfying services, quality improvement and many other obstacles. How can we be sure about the best practice, medical safety, correct investments, cost-saving and other similar topics in our settings? Questions like these can not be answered truly unless we believe management as an inseparable part of our practice which needs to be handled by professionals whether as consultants or as leaders. This presentation focuses on defining the realm of management in radiology from the health administration specialist point of view.
Abnormal Spinal Curvature as a Risk Factor for Pelvic Organ Prolapse
Manizheh Sayyah Melli,Alizadeh Mahasti
Pakistan Journal of Biological Sciences , 2007,
Abstract: To determine the relationship between pelvic organ prolapse and spinal curvature changes, a cross-sectional study was done in Gynecologic and Obstetrics educational hospitals and clinics in North West of Iran. One hundred patients were classified as cases based on the presence of abnormality at the spinal curvature and 100 patients classified as controls with no abnormality. The POP-Q (pelvic organ prolapse quantitation) staging system was used for assessment of prolapse stage and a flexi-curve malleable rod for measurement of thoracic and lumbar length and width, respectively. Main outcome was the stage of prolapses. The stage of prolapse was higher in cases compared to controls. There was a significant statistical difference between prolapse stage in two groups (p-value = 0.035). Among cases, grade II prolapse was the most prevalent abnormally (56%) and the grade III, I and IV were observed in 32, 5 and 7%, respectively. These observations underline the importance of taking into account the abnormal changes in spine curvature of patients when investigating risk factors for development of pelvic organs prolapse.
Experimental Validation and Simulation of Fourier and Non-Fourier Heat Transfer Equation during Laser Nano-Phototherapy of Lung Cancer Cells: An in Vitro Assay  [PDF]
Mohammad E. Khosroshahi, Lida Ghazanfari, Payam Khoshkenar
Journal of Modern Physics (JMP) , 2014, DOI: 10.4236/jmp.2014.518208
Abstract: This paper investigated the numerical scheme extended to solve the hyperbolic non-Fourier form of bioheat transfer equation and the experimental trials were conducted to validate the numerical simulation. MNPs were prepared via co-precipitation and modified with a silica layer. The amino modified Fe3O4/SiO2 nanoshells were covered with gold colloids producing nanoshells of Fe3O4/SiO2/Au (MNSs). In vitro assays were performed to determine the effect of apoptosis of QU-DB lung cancer cells based on the cells morphology changes. Cell damage was reduced by decreasing the power density of laser. Also, a larger area of damage on cell culture plates was observed at longer intervals of laser irradiation. The effect of nanoshell concentration and irradiation rate has been evaluated. A maximum temperature rise of 6°C was achieved at 184 W/cm2 and concentration of 0.01 mg/ml. The experiment confirmed a hyperbolic behaviour of thermal propagation. The results revealed that the three-dimensional implementation of bioheat equation is likely to be more accurate than the two-dimensional study.
Effect of Air-Abrasion on Micro shear Bond Strength of Two Resin Cements to Cercon Porcelain
Sahabi Mahasti,Fayaz Ali,Yaghmaie Kaveh
Research Journal of Medical Sciences , 2012, DOI: 10.3923/rjmsci.2010.142.145
Abstract: In preparation of All-Ceram restorations with Zirconia Bases choosing appropriate cement with maximum strength and a proper method for decontamination of restoration surface in case of contamination to saliva is of great importance for the prognosis of the restoration. According to previous studies, Panavia F2 is the preferred cement for restoration of All-Ceram Zirconia based cements. Regarding the limited number of studies related to comparison of bond strength new cements with Panavia F2 and absence of data in respect to the effect of Air-abrasion on the bond strength, the aim of this study was to evaluate the bond strength of Panavia F2 and Rely XU100 to Cercon porcelain with and without Air-abrasion. About 12 porcelain blocks of 17.5x7x1.5 mm3 were prepared using CAD/CAM method. Specimens were divided into 2 groups of 6 blocks each (Air-abraded and non-Air-abraded) then 36 cylinders (0.6 mm2 x1 mm) of each resin cements were prepared according to the manufactures instructions. In each group, 18 specimens were bonded to the three Air-abraded and three non-air-abraded porcelain blocks. Cercon blocks bonded to resin cylinders were placed in the Micro shear bond strength tester and the data were recorded. The results were then analyzed with two-way Anova analysis using SPSS (version 11.5). The mean value of micro shear bond strength for Panavia F2 group bonded to Air-abraded and non Air-abraded Cercon blocks were 72.2 N (120 Mp) and 48.44 N (48 Mp) for Panavia F2 and 46.22 N (77.03 Mp) and 40.16 N (66.93 Mpa) for Rely XU100, respectively. Micro shear bond strength values for Panavia F2 cement were significantly higher than those for Rely XU100. Air abrasion has increased micro shear bond strength in both groups and the amount of increase was significant in Panavia F2 group (p<0.001). Air-abrasion before cementation increases bond strength to Cercon porcelain.
Analysis of V Transmission Lines Response to External Electromagnetic Fields
Ahmad Cheldavi;Payam Nayeri
PIER , 2007, DOI: 10.2528/PIER06093003
Abstract: In the present paper the response of V transmission line to electromagnetic illumination has been obtained. Also in order to determine the VTL frequency operation band for both TE and TM modes a Gaussian pulse source has been applied to the structure. The VTL structure has received considerable attention in high frequency and microwave IC packaging. The purpose of this study is to determine high frequency design considerations in order to reduce the effects of electromagnetic interference (EMI) on the VTL structure and maintain the desired performance. It was observed that the effect of incident EM waves on the V lines performance is considerably lower than conventional microstrips, however the V lines are more sensitive to sources at close proximity. In addition, although the V lines show lower dispersion at higher frequencies, their frequency operation band is limited by a resonance like behavior which is directly related to the V groove dimensions. The full wave analysis is carried out using the Yee-cell based 2 Dimensional Finite Difference Time Domain method (2D-FDTD), while enforcing a very stable and efficient mesh truncation technique.
Guide Vanes Effort of Wells Turbine on OWC wave Power Plant Operation
Ahmad Darabi,Payam Poriavali
Lecture Notes in Engineering and Computer Science , 2007,
Abstract:
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