Showing 6 results for Shadan
Volume 0, Issue 0 (ARTICLES IN PRESS 2024)
Abstract
Zeolites are recommended to utilize in agricultural sector due to their water holding and cation exchange capacity. Effect of zeolite on the hydraulic parameters of sandy loam soil was investigated and HYDRUS-2D was used to simulate the movement of water in the soil. Data needed were collected by conducting laboratory experiments. The studied treatments included four levels (zero, 5, 10, and 15 gr kg-1 of soil) to determine the effect of zeolite on hydraulic parameters including saturation moisture (θs) residual moisture (θr), shape parameter (n), point Check air permeability (α) and saturated hydraulic conductivity (Ks) of the soil. Four rounds of irrigation were done based on readily soil moisture and the soil moisture values before and after irrigation were measured using the Wet sensor in the depth and radial directions and recorded for 45 days. The initial value of hydraulic parameters including θs, θr, α, n and Ks were determined using Rosetta. Results showed that with increasing in the amount of zeolite, the parameters θs, θr and n increased and the value of α decreased, which indicated a decrease in the rate of water discharge from the soil. While the values of Ks tended to decrease. In fact, the mixing zeolite with soil causes to hold more water because of micro-pore structure of zeolites. The HYDRUS-2D model with the efficiency coefficient (EF), which shows the quality and how to fit the observed and estimated data, varied between 0.82 and 0.97, which shows the high efficiency of model in simulating humidity.
Volume 5, Issue 3 (Summer 2019)
Abstract
Aims: Despite the vast global vaccination programs against the HBV infection, millions of people are chronic HBV carriers worldwide. The present study aimed to evaluate the distribution of different clinical forms of Hepatitis B infection among HBV infected patients to find the frequency of people at risk of developed liver diseases in Isfahan province.
Materials & Methods: This cross-sectional study was performed on 600 HBV infected patients admitted to Al-Zahra hospital in Isfahan from March 2017 to March 2018. Based on the virological markers, HBV infection in participants was categorized into four clinical forms including post-infection immunity, acute hepatitis, asymptomatic carrier state, and chronic active hepatitis. Enzyme-linked immunosorbent assay (ELISA) and polymerase chain reaction (PCR) were used for screening HBsAg, anti-HBs, anti-HBc, HBeAg, anti-HBe, and viral DNA in serum samples.
Findings: In this study, 308 (51.3%) females and 292 (47.7%) males with HBV infection and the mean age of 39 years were participated, of whom 189 (31.5%), 172 (28.7%), 138 (23%), and 101 (16.8%) participants were found to be in the post-infection immunity, acute hepatitis, asymptomatic carrier state (inactive carrier), and chronic active hepatitis forms of HBV infection, respectively.
Conclusion: The results of this study highlighted the high prevalence of asymptomatic carrier and chronic active hepatitis forms of HBV infection in 20-40 year old patients. Extensive measurements are needed to determine the prevalence of these two mentioned forms of HBV infection in all provinces of Iran in order to control the economic and life burden of disease in people not covered by the infant vaccination programs in Iran.
Volume 9, Issue 2 (Summer 2019)
Abstract
Aims: Optimizing energy consumption in buildings, which includes a large part of the total energy consumed in the country, is very important. The window is also part of the interface inside and outside the building. The purpose of this research is to optimize the opening in the office in Tehran in terms of obtaining enough daylight and reducing energy consumption.
Methods: Simulation and optimization of the window performed parametrically in the Grasshopper and analysis of the objectives using the Honeybee and Ladybug plugins. The spatial Daylight Autonomy (sDA) and the Energy Use Intensity (EUI) calculated for proportions and varied window positions in eight variable directions.
Findings: The windows on the eastern north rotation and later in the east rotation had the best results. The window to wall ratio was 20% to 28%, with an average length of 6.53 and 0.9 meters, respectively, for the research model, the most ideal response. The distance between the windows to wal and the sillheight were respectively 0.65 and 2.22 meters.
Conclusion: Using modern simulation techniques enables building designers to have more intelligent choices in design with scientific approaches. The repeatable framework presented in this study can be used for buildings with different user positions or proportions, and ultimately enable designers to play an effective role in sustainable development by increasing their design productivity.
Volume 12, Issue 3 (Summer 2024)
Abstract
Aims: This study aimed to investigate the effect of yoga on the sexual function and sexual quality of life of women after vaginal delivery.
Materials & Methods: This randomized controlled trial included 36 women who were 8-10 weeks postpartum, recruited from a health center in Isfahan, Iran, from January 2020 to March 2021. The women were randomly assigned to two groups with a block size of four, including the intervention group that practiced sexual yoga techniques and the control group that received information on postpartum recovery and lactation. Both groups completed the Sexual Quality of Life-Female Questionnaire and the Female Sexual Function Index before the intervention, as well as one month, two months, and three months after the intervention. Data were analyzed by R software using the independent sample t-test, analysis of variance, Friedman’s test, and the Chi-square test.
Findings: The mean total score for sexual function three months after the intervention in the intervention group showed a significant improvement compared to before the intervention (20.52±7.86 vs. 29.56±3.53, t(34, 0.975), p<0.001). Additionally, the sexual quality of life in the intervention group significantly improved after three months of intervention compared to the control group (99.94±10.62 vs. 76.83±20.23, t(34, 0.975), p<0.001).
Conclusion: Yoga practices enhance the sexual function and sexual quality of life of women following vaginal delivery.
Volume 15, Issue 2 (In Press Summer 2025)
Abstract
Aims: In many classrooms, due to the lack of daylight uniformity and preventing glare, curtains are drawn and artificial light is used, which increases energy consumption and reduces students' learning. One of the effective solutions is using a lightshelf. Many studies have been conducted, but they often ignored the effect of work surface height on the optimal height of the lightshelf and did not make a difference between education levels. In this research, in addition to investigating the effect of the lightshelf on daylight quality, the proper height of the light shelf in educational levels and in 4 latitudes in Iran (40, 35, 30 and 25 ̊ N) has been investigated.
Methods: The simulations were done in a classroom using Rhino and Honeybee, Ladybug plugins. In order to evaluate the accuracy of the simulations, a scale model was made and the measurement were compared to the simulation results.
Findings: By combining the light shelf and horizontal louvres, an optimal system was achieved in order to increase the daylight quality. The effect of different latitudes as well as different heights of desks were investigated.
Conclusion: The results showed that the use of lightshelves in all cities of Iran has increased the daylight quality, while with the increase in latitude and the work surface height, the optimal height of the lightshelf should be increased.
Volume 20, Issue 5 (7-2018)
Abstract
Selection based on the traits affecting grain yield is used for its indirect improvement. The objective of the present study was to determine the quantity and mechanism of effects of agro-morphological and physiological traits on grain yield of bread wheat under terminal drought conditions. Thirty six advanced lines of wheat were evaluated in a Randomized Complete Block Design with three replications during three sequential growing seasons 2010-2013 under rainfed conditions. Stepwise regression, path analysis, and canonical correlation analysis were conducted. All three components of yield had a significant positive effect on grain yield. The first canonical variable of predictive traits (U1) and yield components (V1) were studied. In general, selection for shorter vegetative stage and longer grain filling period is recommended to improve wheat grain yield per plant under rainfed conditions. Also, the desirable lines were those that had high amounts of biomass, average plant height and spike length, and low amount of canopy temperature. These types of lines are expected to produce higher numbers of grain per plant (not per spike) and 1000-grain weight, simultaneously, and thus higher grain yield per plant.
