a.saei

This study explained why the national identity became important in the first Pahlavi state, why ancient elements of Iranian identity were highlighted, and why Islamic elements of their identity were marginalized. The results show that due to Iran's integration into the world system, the necessity of modern nation-building, and the importance of national identity in the modern state, made Iranians focus on their national identity. Since the powerful social forces challenged the state power at this period of time, the state tried to eliminate these social forces by enacting specific identity policies. Therefore, the state’s identity policies were mainly based on the state interests and not on the state ideology. In addition, these policies were formulated to weaken the rival social forces, especially the clergy and tribal leaders.

In this paper a novel four-leg interleaved DC-DC boost converter is proposed which is well suitable for fuel cell vehicles (FCV) application. The voltage stress of two switches of this converter is half of the conventional interleaved converters. Therefore, smaller and cheaper switches can be utilized. Also "on" state duration of the two of four switches are reduced in comparison with conventional converter. Furthermore, comparing the losses of the proposed converter to conventional one – which is used in ¡Toyota Mirai 2015 – shows a significant loss reduction in full power range. The proposed converter is simulated within an FCV in urban and highway driving cycles using ADVISOR software. The results show that the average power loss of the converter is improved about 32% in urban cycle and about 17% in highway cycle comparing to conventional one.

In conventional methods of spraying in orchards, the amount of pesticide sprayed, is not targeted. The pesticide consumption data indicates that the application rate of pesticide in greenhouses and orchards is more than required. Less than 30% of pesticide sprayed actually reaches nursery canopies while the rest are lost and wasted. Nowadays, variable rate spray applicators using intelligent control systems can greatly reduce pesticide use and off-target contamination of environment in nurseries and orchards. In this research a prototype orchard sprayer based on machine vision technology was developed and evaluated. This sprayer performs real-time spraying based on the tree canopy structure and its greenness extent which improves the efficiency of spraying operation in orchards.
The equipment used in this study comprised of three main parts generally: 1- Mechanical Equipment 2- Data collection and image processing system 3- Electronic control system
Two booms were designed to support the spray nozzles and to provide flexibility in directing the spray nozzles to the target. The boom comprised two parts, the vertical part and inclined part. The vertical part of the boom was used to spray one side of the trees during forward movement of the tractor and inclined part of the boom was designed to spray the upper half of the tree canopy.
Three nozzles were considered on each boom. On the vertical part of the boom, two nozzles were placed, whereas one other nozzle was mounted on the inclined part of the boom. To achieve different tree heights, the vertical part of the boom was able to slide up and down. Labview (version 2011) was used for real time image processing. Images were captured through RGB cameras mounted on a horizontal bar attached on top of the tractor to take images separately for each side of the sprayer. Images were captured from the top of the canopies looking downward.
The triggering signal for actuating the solenoid valves was initially sent to the electronic control unit as the result of image processing. Electronic control unit was used to adjust the right time of spraying based on the signals received from the encoder to precisely spray the targeted tree. The distance between the camera and spraying nozzles was considered in the microcontroller program. The solenoid would be turned off and stop the spraying when the vision system realized that there was a gap between the trees.
Water sensitive papers (WSP) were used to evaluate the sprayer performance in prompt spraying of the trees and cutting off at hollow spaces between the trees.
Water sensitive papers were attached to three ropes extended along the movement direction of the tractor at top, middle, and bottom of the trees so that each tree comprised 9 WSPs whereas other 9 WSPs were placed at each gap between two successive trees. Three levels of forward speed of 2 km h-1, 3.5 km h-1and 5 km h-1 was tried in these experiments to evaluate the effect of forward speed on spraying performance. Experiments were conducted in three replications. Liquid consumption of the sprayer designed in this research was compared with the conventional overall spraying.
Analysis of variances of data gained from water sensitive paper corresponding to the sprayed areas showed a significant effect of forward speed on prompt spraying.
Comparison of means of spraying coverage on WSPs at different forward speeds with four replications showed that the maximum amount of targeted sprayed pesticide has been achieved at the lowest speed (2 km h-1) while the lowest amount of sprayed was seen at the maximum speed. Although higher forward speed is preferred because it increases the operation capacity of the sprayer, increasing the forward speed of the sprayer reduces the coverage density of the liquids on WSPs because the output rates of the nozzles are constant. Therefore, in cases that higher forward speed is demanded, more nozzles should be added to the sprayer booms
Comparison between the liquid consumptions of the proposed system and conventional overall spraying showed that in this study, up to 54% less material has been used for the experiment in olive orchard.
The sprayer designed in this study was able to detect the gap between the trees in orchards using a machine vision system to stop the spraying on places where no tree exists. Results showed that employing the new sprayer decreased a significant amount of spray liquids which can be important both economically and environmentally. Considering to lack of pesticide spraying in the hollow spaces between the trees, certainly, more significant reduction is expected to achieve in young orchards where trees are small and there are larger gaps between the trees

diseases and emphasis on using nondrug treatments, this study was performed to assess the effect of wheat germ on lipid profile reduction among hyperlipidemia and normolipidomia students. 108 volunteer students in the age range of 21.33±2.15 years old (74 normolipidemics, 34 hyperlipidemics) were entered to the study. In addition to their typical diet, these students were asked to take a 30- gram wheat germ in their daily diet for 4 weeks. Hyperlipidemia and normolipidomia participants were determined based on National Cholesterol Education Program Adult Treatment Panel 3 (NCEPATP3) guidelines. Anthropometric and metabolic measurements, calorie and mineral intakes, before and after the intervention were taken and analyzed using paired t-test (SPSS version 19). In the wheat germ group, total cholesterol, triglycerides and VLDL (p=0.001) significantly reduced to 10.5, 19 and 20%, respectively. Also parameters of HDL-C/TC (p=0.004) and systolic blood pressure (p=0.046) significantly increased (in both groups) and decreased (in hyper lipidemic group), respectively. In addition, total cholesterol level decreased significantly (p=0.003) in normolipidemic students. There was no statistically significant change in other parameters. Due to significant decrease in triglycerides in hyperlipidemic group and total cholesterol levels in both groups, consumption of wheat germ, as a nondrug treatment, for prevention of cardiovascular diseases and dyslipidemia is suggested.