hossein malek mohammadi

In this study, the effects of Cloisite 20A modified nanoclay and graphene oxide on the compression behavior of polycarbonate nanocomposite were examined by experiment. Samples were prepared based on injection and the masterbatch method was used for a better dispersion of nano particles in the matrix phase. The masterbatch of nanoclay was prepared through the direct method using an extruder, and the masterbatch of graphene oxide was prepared using the solvent method. The clay reinforced nanocomposite were prepared for three weight percentages of 0.5%, 1%, 3%, and samples of graphene oxide nanocomposites were produced for 0.3%, 0.6%, 0.9%. The compression test was performed at three strain rates of ε ̇=〖10〗^(-3),〖10〗^(-2),〖10〗^(-1) s^(-1) at ambient temperature using a universal testing machine, Santam. The results showed that, by increasing the strain rate, the yield stress is increased. Moreover, the best weight percentage of clay and graphene oxide was 1% and 0.6%, respectively, which made improvement of 7.6% and 6.2% in the compression yield stress, respectively. Additionally, a model was proposed for predicting the compressive stress-strain curve at various strain rates based on a modified G’sell-Jonas model. The proposed model could reasonably predict the stress-strain curves at the applied strain rates. Finally, based on the combination of Eyring model and the micromechanical model of Turcsanyi, a model was proposed for describing the yield stress of the nanocomposite based on volume percentage of filler and strain rate.

The present study introduces a bi-objective optimization model for emergency medical service location to make balance between accessibility and coverage target functions. The recommended model considers location strategic decisions and allocation tactical decisions. Moreover, in contrary to most models which consider fixed capacity for potential points of facilities that cause some limitations in using such models; this article introduces a modular planning problem that is capable of considering several possible capacities for facilities. The new model considers the allocation of demands out of coverage zone for optimal location of ambulances. Applying of this model to the case study that its data obtained from emergency center of Kerman City was studied. Finally, the numerical results obtained from model deployment and sensitivity analysis tests were presented in addition to managerial points.

The present research introduces a multi-objective robust optimization model to design emergency medical services network for uncertain costs and demands. The proposed model determines the location and the optimum capacity of relief medical service centers. In addition, the model determines the number and the type of ambulances that should be placed in each of the centers and allocated to demand zones. The multi-objective model attempts to maximize the coverage of demand zones, the availability of ambulances and minimizing the total costs simultaneously. A robust model is applied to our real word case study in an urban district.

The wisdom is dependent on the unique integration of personality structure which enables people to transcend their personal perspectives and accept collective and public concerns. Fundamental ties between wisdom and growth of youth personality have been recently discussed by personality theories including Erikson, Jung and Kohut. These theories suggest that there is a lot of relation between the growth of personality and wisdom. The aim of this study is to predict based on personality traits. The research design is correlation. The research sample was consisted of 150 available subjects (convenience sampling). Their average age was 20 (16-24) who 70% (105 people) of them were female and 30 % (45) were male. NEO Five-Factor test (NEO-PI-R) was used to collect data from three-dimensional scale of wisdom (3D-WS). Pearson correlation and backward regression analysis were used to analyze the data. The results showed that there is a significant relationship between personality traits and wisdom. Given the importance of internal and external factors associated with wisdom, understanding these factors will contribute to a better understanding of wisdom structures. Big five factors of personality (neuroticism, conscientiousness, agreeableness, openness and extroversion) are correlated with wisdom. Also neuroticism, agreeableness, openness and extroversion among big 5 factors of personality can significantly predict wisdom variance. Although the personality factors are predictive of Wisdom, but based on research, a complete unification between the factors of prediction is more precise.

One of the theoretical perspectives for the study of wisdom is related to intelligence. Equilibrium theory of wisdom begins with tacit knowledge structure which is a major component of practical intelligence. Hypotheses also show that there is a relationship between creativity and wisdom. Therefore, this research has been conducted in the field of Wisdom with an analytical approach and is a correlation study. The aim of this study was to investigate the relationship between creativity and intelligence with wisdom in youths. The research design is correlation. Sample consisted of 120 volunteer. Their mean age was 20(in the range of 16-24) who 50 percent (n = 60) were girl and 50 percent (n = 60) were boy. Wechsler Youth Intelligence Scale (WAIS-R), Torrance Test creativity, Abedi creativity test was used to collect information from three-dimensional scale of wisdom (3D-WS). Pearson correlation test was used to analyze the data. The results showed that there is a significant relationship between creativity and intelligence with wisdom and creativity, if a person gets higher score in creativity and intelligence with wisdom index will get higher score in wisdom. Given the importance of internal and external factors associated with wisdom, understanding these factors will contribute to a better understanding of wisdom structure. The findings indicate that there is a relationship between intelligence and creativity with wisdom. Therefore, further research in this field and the emphasis on the subject of creativity and intelligence in the educational system can enrich the concept of wisdom in the future.

Wisdom is not a new concept that nowadays can be regarded as being technically advanced in the information age, but wisdom is also associated with an implicit concept of “antiquity” which is apparently beyond its own time, knowledge and culture. The presented study aimed to examine the concept of wisdom in adults using personality traits. The study consisted of 1016 individuals using available sampling method with age range of 18 -71 (519 women and 497 men). A researcher- made questionnaire including 206 personality traits was used for data collection and exploratory factor analysis was used for data analysis. Factor analysis indicated three effective factors: self-centeredness, intellectuality, philanthropy. The results obtained from the present study indicated that the mean value of 2.49 for the first factor is less than the mean values of 5.62 and 5.46 for intellectuality and philanthropy, respectively. The results of the present study revealed that wisdom is a multidimensional concept. In other words, wise people are also intellectual and philanthropic. In contrast, unwise people are those who are self-centered indicating traits associated with implacability.