Showing 6 results for Balali
Volume 6, Issue 3 (Summer 2018)
Abstract
Aims: Considering the evolution of schools and the growth of smart schools, the aim of the present study was to compare the self-efficacy and academic performance of students in conventional and smart schools.
Instruments and Methods: This cross-sectional descriptive-analytic study was conducted in Kerman, Iran, in 2015. 300 students of 8th grade studying in Kerman (145 smart school student and 155 conventional school students) were selected by multi-stage sampling method. Data were collected by a standardized academic self-efficacy questionnaire of Jinks-Morgan and analyzed using independent t-test, linear regression, Pearson correlation test and SPSS 20 software.
Findings: Academic achievement in conventional and smart schools was statistically different. So that students of smart schools had better academic achievement than ordinary schools (p=0.0001). While the self-efficacy of the two groups did not differ significantly. There was a significant direct correlation between students' academic achievement and their self-efficacy score (r=0.159, p=0.006). Also, there was a significant statistical difference, according to the type of school, occupation, and education level of parents (p<0.0001).
Conclusion: The academic self-efficacy of students in the two groups do not differ, students of smart schools have the higher academic achievement. School smartness and high self-efficacy will improve students' academic achievement.
Volume 7, Issue 1 (Winter 2025)
Abstract
achiving optimal soil governance taking into account Iranian contex needs theoretical and practical framework. Regarding this, the Islamic Iranian model of progress as well as issues raised in the 17th and 18th Iranian Soil Sciences Congresses in 2022 and 2024 were examined. Stewardship environmental governance in the Islamic Iranian model of progress, is crystallized in the four relations between human and Allah, himself, others, and nature. This indigenous theory in relation to the country’s public governance has provided the context for extension of discourse and paradigm shift. In the implementation of soil governance, the establishment of soil bureau in the Ministry of Jihad Agriculture and its branches in the provinces since 2016, and also, the approval of the Soil Protection Law in 2018 has taken an important step in the direction of increasing the effectiveness of the government and other authorities. Moreover, review of the approved law showed that indicators such as the rule of law, transparency and justice are better and more coherent than indicators such as accountability and participation. To institutionalize stewardship soil governance and improve effective and constructive interaction of government with other civil and private sectors, it was proposed to create country's comprehensive soil database and legal access to it, to define indigenous soil governance indicators and to encourage participation of local communities in the soil resources management. This theoretical and practical set should be elaborate under country’s general governance through stakeholders’ participation at all levele.
Volume 10, Issue 4 (11-2021)
Abstract
Pesticides improve crop yields, but misuse imposes environmental problems and diseases or abnormalities in humans. Based on food security definition, balanced attention to healthy and sufficient products, there is a growing need to pay attention to product health. The present study was aimed to measure the residual levels of chlorpyrifos (CPF) and diazinon (DZN) in potato Solanum tuberosum L. cv. Agria and their chips by accurate, rapid, and reliable extraction method (QuEChERS) using gas chromatography equipped with NPD detector (GC-NPD). The samples were analyzed in pre-harvest stages, harvest, and storage. The recovery of DZN was 95.76–99.87% and 82.38–98.05%, and the CPF 90.85–99.07% and 79.4–89.76% in potatoes and chips, respectively. According to the specifications of the European Commission, the relative standard deviation (RSD) of <11% detected in this study confirms the accuracy of the extraction method. Moreover, the CPF residual level was detected only in the pre-harvest stage; however, the DZN residual levels in the pre-harvest, harvest, and storage stages, and chips were 0.074 ± 0.007, 0.039 ± 0.014, 0.029 ± 0.009, and 0.13 ± 0.042 μg.g-1, respectively. The residual level in chips and harvest and storage stages was higher than that in the maximum residue level (MRL).
Korosh Khorshidi, Mohammad Balali, Ali Asghar Ghadimi,
Volume 15, Issue 9 (11-2015)
Abstract
In this study out of plane active vibration control of a laminated composite rectangular plate with intermediate line support coupled with piezoelectric patches on both sides, upper and lower surface of the plate, is presented based on First order shear deformation plate theory (FSDT). Is this study, the piezoelectric patch is used as a sensor. In the relation of piezoelectric, electrical potential in the transverse direction earned by satisfaction of electric boundary conditions (open circuit) and Maxwell's electricity equation. The Rayleigh-Ritz approach is used to obtain natural frequencies and vibration mode shapes of the plate. Forced vibration response is obtained by using by the modal expansion method.In this paper, the Linear Quadratic Regulator (LQR), Linear Quadratic Gaussian (LQG) and Fuzzy Logic Controller (FLC) are used to control and reduce the amplitude of the transversely deformation of a laminated composite rectangular plate which is excited by external forced. In the numerical results, the effect of various inputs, e.g. positions of the external forced, on the responses of the system are examined and discussed in detail. The proposed analytical method is validated with available data in the literature.
Volume 19, Issue 2 (3-2017)
Abstract
This study was aimed to assess the effects of excess boron on 59 genetically divergent wheat accessions and to identify those with high and stable yields under a range of soil boron concentrations. The second aim was to test the applicability of a laboratory technique performed at juvenile stages of development in estimating field boron tolerance. The study comprised a control and three boron treatments, applied as 50, 100 and 150 mg boric acid L-1 in laboratory, and 33.0, 67.0 and 133.0 kg boric acid ha-1 in field trial. Yield performance and stability were evaluated using biplots from sites regression model, while interrelationships among analyzed parameters were assessed using path coefficient analysis. Parameters were mostly decreased by excess boron when compared to the control (seedling root length, seedling dry weight, grain number per spike, grain yield, flag leaf area, leaf area duration and grain weight). Significant increase was noted for seedling boron concentration and content, percentage of sterile spikelets per spike and number of spikes per m2. Spike length, number of spikelets per spike, and anthesis date remained unaffected. The majority of accessions with high and stable yields were of local origin, so, we conclude that adaptation to environmental factors other than elevated soil boron plays an important role in overall field boron tolerance. The effects of excessive external boron on boron accumulation noted at the seedling stage in laboratory studies corresponded to its effects on yield in field.
Volume 26, Issue 6 (11-2024)
Abstract
By studying the physical properties of oilseed rape, the obtained data have a practical application when constructing machines for sowing, harvesting, transporting, warehouse design, and seed processing. During oilseed rape harvest, seed moisture can be different, and it is imperative to understand the physical properties of the seeds to correctly adjust the equipment. Depending on the climate conditions, oilseed rape can have different seed moisture content. This investigation included three winter varieties of oilseed rape widely grown in European countries. The effect of different degrees of seed moisture (6, 11, 16, and 21%) on the physical properties of oilseed rape, seeds were investigated by using standard methods in three growing seasons (2015/17). When moisture content in the kernels increased, 1000-grain weight, seed volume and porosity, static and dynamic angles of repose also increased in the tested varieties. Increased seed moisture reduced the true density and bulk density of the three tested varieties. The highest coefficient of friction was found on plywood and the lowest on stainless steel sheet. Oil and protein contents of the tested varieties ranged between 39.38 and 43.90%, and 17.65 and 23.12%, respectively. Oleic, linoleic, α-linolenic, and palmitic acids were the most representative fatty acids. Knowing the physical and chemical properties of oilseed rape seeds, it would be possible to significantly contribute to the breeding process in order to identify high-quality genotypes.
