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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: International Journal of School Health
- نوع مقاله: Journal Article
- کلمات کلیدی: Factor analysis,Executive function,Preschool
- چکیده:
- چکیده انگلیسی: Background: Executive functions are among abilities which school children require for learning in the future and deficit in executive functions in preschool children can continue into the older age and leads to serious problems in children in relation to doing their homework and other personal affairs. Objectives: The objective of the present study is to determine the validity, reliability and factor structure of the per-school version of behavioral rating inventory of executive functions (parent’s form) in Iranian children. Patients and Methods: The present study comprised 592 children aged from 2 - 5 years selected from pre-school centers of the city of Isfahan in 2013 - 2014 using cluster random sampling method, with their parents answering the questions asked in this inventory. The correlation coefficient among items with a total score of factors, Cronbach’s alpha coefficient, confirmatory factor analysis, and the correlation coefficient among the subscales were used to measure the reliability and internal consistency of the inventory. Results: Confirmatory factor analysis confirmed embedding items and the five-factor structure of the inventory including inhibition, shift, and emotional control, working memory and planning. In addition, Cronbach’s alpha coefficient was at satisfactory level for each of the factors and the total score of the scale (≥ 0.60). Conclusions: In general, it can be concluded that the behavior rating inventory of executive function (BRIEF) for preschool-aged children is a reliable and valid instrument for measuring executive functions of Iranian children, and can be used as a suitable means for psychological research and clinical situations.
- انتشار مقاله: 11-10-1348
- نویسندگان: Ali Akbar Ebrahimi,Aziz Kassani,Rostam Menati,Ahmad Abedi,Ahmad Yarmohammadian,Salar Faramarzi
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Horticultural Science and Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Phosphorous,Regression model,Fertilizer recommendation,Washington Navel orange
- چکیده:
- چکیده انگلیسی: Several methods have been proposed for recommendation of phosphorus fertilizers. Each of them only examines the concentration of phosphorus in the soil or plant, while none of them investigates the correlation between phosphorus concentrations in the soil and plant. In this study, a method called "integrated plant and soil system" (IPSS) is proposed to describe phosphorus fertilizer. In this system, for recommendation of phosphorus, the correlation between this element in soil and plant was used. For this purpose, 39 Washington Navel Orange orchards were selected in Jahrom region and from each orchard three trees were chosen. Samples were taken from soil and plants during two consecutive years and their phosphorus was measured. Orchards were divided into two categories, first group high-yield orchards and another includes all orchards. The correlation was run between soil properties and phosphorus of plant organs with the phosphorus of soil saturation extract samples. Factors were selected that shown significant correlation with the phosphorus of soil saturated extract, and multivariate regression was established between them. The results showed a significant correlation between phosphorus of plant organs and soil samples, and the highest correlation was observed between fruit phosphorus and phosphorus of soil saturation extract. Moreover, there was a significant correlation between phosphorus of plant organs, and the highest correlation was observed between fruit phosphorus with other plant organs. A equation was also obtained for each of the two orchard groups, these two equations can calculate the amount of phosphorus required for orange orchards.
- انتشار مقاله: 20-12-1396
- نویسندگان: Abdolkarim Ejraei,Ahmad Mohammadi Ghehsareh,Mehran Hodaji,Ali Asghar Besalatpor
- مشاهده
- جایگاه : پژوهشی
- مجله: Annals of Optimization Theory and Practice
- نوع مقاله: Journal Article
- کلمات کلیدی: TOPSIS,Multi-criteria decision making,Country risk ranking,International investors
- چکیده:
- چکیده انگلیسی: The Middle East and North Africa (MENA) have been attracting many international investors for decades, but the current geopolitical situation has not shown a welcoming face towards foreign investors. Consequences of war, terror and political changes in the region have forced many international companies to reconsider their plans or withdraw their investments. On the other hand, there are companies that have faith in investing in the emerging market of the MENA with fewer competitors. It must be mentioned that narrowing down the best possible decision needs research on the current situation as well as analyzing and forecasting of the upcoming situations in terms of many factors within the country concerned and the region. The Multi-Criteria Decision Making (MCDM) analysis helps investors to choose the best alternative from a set of relevant criteria. In this paper, one of the well-known MCDM methods, TOPSIS, was used to rank twenty-three countries based on twenty key indicators within the years 2000-2015. The outcome of these findings provides a set of country rankings for an interested group of decision makers, policy makers, stakeholders, and other involved parties based on their interest in the MENA region in the so-called Arab Spring and post-Arab Spring environment.
- انتشار مقاله: 16-01-1397
- نویسندگان: Ahmad Mohammadi Dehcheshmeh,Nima Mirzaei
- مشاهده
- جایگاه : پژوهشی
- مجله: Advances in Environmental Technology
- نوع مقاله: Journal Article
- کلمات کلیدی: Napropamide sensor,carbon nanotube sensor,microwave sensor,Polypyrrole-Chitosan
- چکیده:
- چکیده انگلیسی: This paper presents the design and fabrication of proximity coupled feed disk resonator coated with Multi Walled Carbon Nanotubes (MWCNTs) and Polypyrrole-Chitosan (PPy-CHI) layers as a napropamide sensor. Computer Simulation Technology (CST) microwave studio was used to obtain the best design of disk resonator and feed line position in 5 GHz resonant frequency. Also, MWCNTs - PPy-CHI layers were coated on the disk resonator using electric field deposition and chemical interaction between sensing layer and napropamide was investigated by Fourier Transform Infrared Spectroscopy (FT-IR). The evaluation of the system was performed using different concentrations of commercial napropamide and pure napropamide at room temperature (25 0C). Experimental results prove that proximity coupled feed disk resonator coated with MWCNTs-PPy-CHI layers is a simple, fast (Measurement- time=5 seconds), accurate (as low as 0.1 ppm), low cost and it has the potential of fabrication as a portable instrumentation system for detecting pesticides in water and soil.
- انتشار مقاله: 10-08-1395
- نویسندگان: Ahmad Mohammadi,Amir Reza Sadrolhosseini,Hamid Shoja Nazeri Shoja Nazeri
- مشاهده