درخت حوزه‌های تخصصی

In last decades, the skillful planning of land resources has become a major issue for rural development. The development of cultivated areas becomes gradually impossible due to ever increasing population growth and urban development. Fuzzy logic is preferred to Boolean logic for land evaluation, because fuzzy techniques lead to estimate for land use suitability on a continuous scale and can therefore, be more informative than the Boolean technique. The objective of this study is to apply fuzzy set methodology in the context of a decision making process known as the Analytic Hierarchy Process (AHP) to land evaluation for irrigated wheat. The results revealed that the results obtained with fuzzy AHP method are in better agreement (R2=0.911) with the observed yield as compared to those obtained with parametric method (R2=0.804). Although, the fuzzy AHP provided more efficient and accurate results than parametric method, the choice of membership functions, width of the transition zones and weight values are determinant to achieve its realistic results in land suitability assessment.

One of the increasingly important organizational considerations involves occupational health and staff safety. Hence, it is crucial for the managers to identify the key organizational factors contributing to reduce work-related accidents. This study was conducted on 340 workers, employees, experts, supervisors, directors, and managers. The data evaluation involved a questionnaire while the analysis involved SPSS. Additionally, the Kolmogorov-Smirnov test, Pearson correlation, and Kruskal-Wallis test were employed. With regard to the main criteria, the HR training procedure had the highest effect while the HR hiring procedure had the lowest effect on work-related accidents. Considering that HR training procedure has the greatest effect on reducing work-related accidents, it is critical to continuously optimize the training courses; There by to curb the major work-related accidents.

University students are exposed to stress because of their age and their particular situation. Stress can cause serious problems to the health and academic performance of students. One of the factors affecting stress is the environment. Therefore, finding ways to reduce stress in universities is important and needs to be investigated. Unfortunately, one of the fundamental problems of universities is the lack of features and qualities of a space that reduces the stress of students. This means that university spaces are not designed and constructed for reducing the stress of students and enough attention was not paid to this issue. The relative lack of research in this field makes necessary to pay attention to this issue and carry out studies in this regard. The purpose of this study is to provide effective spatial features to reduce the stress of university students and to determine the effectiveness of each of these features. The research is conducted by survey method and Delphi technique was carried out in three rounds. For this purpose, firstly open-ended questionnaires were distributed among the experts. Then the answers were investigated and the lists of features were extracted. In the next step, based on the information obtained, close-ended questionnaires were made and the importance levels of features were put into question among the experts and then data were analyzed using SPSS software. In the final stage, experts expressed their final opinions considering the statistical results of the previous stage. The results of this study showed that effective spatial features on stress reduction of students are classified by influencing level into four categories of environmental conditions, natural factors, environmental comfort and physical aspects. And among the details of these features, adequate and proper light for spaces”, connecting with outdoor and semi-outdoor spaces and desirable sound in spaces, are of utmost importance.

The present study has been done to provide a model to promote organizational health in University of Applied Science and Technology. It is a descriptive survey. Statistical population were 5639 people and 700 people were chosen as a sample by random stratified sampling and they were examined by the researcher-developed questionnaire. To determine content validity of the questionnaire, the review of literature and experts opinion were excerpted; experimental implementation has been applied to determine face validity; and factor analysis was used to estimate construct validity, on the other hand, Cronbachα was 0.795 which show reliability of the instrument. However, the status quo is lower than the average in all the mentioned components at Applied Science and Technology University. The conceptual model of study that include 19 components and 32 mechanisms has been developed, also the degree of model fitness has been judged by experts.

Light and lighting encompass different dimensions of urban life, thus the harmony and coordination of this process with environment and urban space is of great importance. Due to the importance of mental patterns in urban planning, present article analyzes the relation between mental dimensions of lighting and the spatial improvement of Tehran metropolis. The present article is developmental and applied in objectives and uses a descriptive-analytic method. At the same time, it takes advantage of statistical techniques such as factor analysis, correlation, t test and regression. The investigations indicate that lighting influences 3 different parameters, tourism, safety, attractiveness of the environment. Undoubtedly, the quality of urban lighting is considered to be especially important in attracting citizens to these textures. Therefore, it is necessary to improve lighting quality in the process of designing our urban textures. Findings show that the residents of the case study area have a low level of satisfaction regarding the quality of lighting.