m. kohandel

An accurate forecast of wheat yield prior to harvest is of great importance to ensure the sustainability of food production in Iran. The primary objective of this study is to determine the best remote sensing features and regression model for wheat yield prediction in Hamedan, Iran. In addition, the effects of various time windows on different regression models are verified. For this purpose, several vegetation indices (VIs) and reflectance values obtained from Sentinel-2, as input to regression models, are used in different time windows. As a result, Gaussian process regression (GPR) and random forest (RF) represented the top two best methods, and the best results were achieved for the GPR model with the SAVI, NDVI, EVI2, WDRVI, SR, GNDVI and GCVI indices corresponding to the image captured at the end of May. The best model yielded a root mean square error (RMSE) of 0.228 t/ha and coefficient of determination R^2 = 0.73. Moreover, different regression methods regarding the number of training data are compared. The neural network and linear regression were the most and stepwise regression was the model affected the least by the number of training samples. Experimental results provide a technical reference for estimating large scale wheat yield.

Based on the grounds giving form to teachers' professional identity in Iran's educational system, the present study aims to provide a framework to portray, with a power-based approach, the various kinds of professional identity which can be perceived for Iranian teachers. For this purpose, narratives were collected and the discourses were analyzed, which led to different kinds of issues regarding teachers' professional identity, all of which pointed out the influence of power in the creation of identity. Then, in order to organize the findings in accordance with an established theory, Michel Foucault's views and his approach to critical discourse analysis were used. Using documentary analysis, an episteme-like two-dimensional matrix was devised as a framework to display the various possible identities for teachers in the context of Iranian education. One dimension represents the elements constituting the powers residing over teachers' professional performance, while the other dimension depicts the different reactions teachers showed to these elements of power. When these dimensions meet, possibilities arise, each of which can symbolize teachers' identity. Therefore, the different kinds of identity systematically placed in the matrix-like framework of "power like protection" can be regarded as the main findings of this study, which can prove useful when it comes to explaining the range of changes in teachers' identity based on changes in power relations.

The aim of the present study was to determine the casual relationship of neuromarketing with consumer behavior of sport services with relationship marketing mediation as well as the application of neuromarketing research and evaluation of its potential contribution to improving marketing performance especially Iran northwest team clubs. The present study comprised a theoretical section that was consistent with underlying roots and principles of neuromarketing. This topic is one of the less well known and attractive areas in marketing research. This study was applied in terms of aims and the methodology was descriptive-correlational and field in terms of data collection. This topic has been enhanced along with a general overview of consumer behavior and relationship marketing and also has focused on consumers of sport services of team clubs. The sampling method was cluster, random and relative. The statistical population consisted of consumers of sport services of sport clubs in centers of West Azerbaijan, East Azerbaijan, Ardabil and Kurdistan provinces. After quantitative steps, the data were distributed and collected from 429 team club athletes and then were analyzed. The results of factor analysis and path analysis through LISREL 9.3 software showed that both neuromarketing variable (0.78) and mediating variable of relationship marketing (0.56) played a role in explaining sport consumer behavior. Fit indexes of the overall model had a relative good fit with the research data; NFI was 0.93 and the root square index of approximation variance was equal to 0.065.