Identifying and prioritizing the main strategies of the Army in order to realize the vision of the strategic statement of the second step of the Islamic Revolution

The aim of this study was to "identify and prioritize NEZAJA’s strategies in order to achieve the vision of the statement of the second step of the Revolution". The type of research is applied and descriptive-survey method. NEZAJA’s scientific-military experts are the present study population and statistical samples including 53 of them were selected by purposive sampling. First, by holding expert meetings regarding the analysis of the second step statement of the Revolution, 10 new strategies of NEZAJA were identified. Then, using the data collection tool (prioritization questionnaire), the identified strategies were prioritized. The validity of the questionnaire was confirmed based on the opinion of experts and its reliability was obtained based on Cronbach's alpha of %90.2. LISREL was used to fit the model and descriptive and inferential statistical indices were used to analyze the data using SPSS. The results show that the degree of prioritization of NEZAJA's ten strategies in order to achieve the vision of the declaration of the second step of the revolution is generally in a "priority". The prioritization of the identified ten strategies also showed that the strategies of "developing motivational subsystems" (with a mean and standard deviation: 3.92±1.412), "Improving combat readiness by developing technologies Modern UAVs, ground combat and war game systems "(3.75±1.440) and also" Establishment of a system for talent identification and elite defense of human resources" (3.72±1.350) have the highest priority for achieving the vision of the declaration of the second step of the revolution

Axisymmetric planar cracks in finite hollow cylinders of transversely isotropic material: Part II—cutting method for finite cylinders

This paper is the outcome of a companion part I paper allocated to finite hollow cylinders of transversely isotropic material. The paper provides the solution for the crack tip stress intensity factors of a system of coaxial axisymmetric planar cracks in a transversely isotropic finite hollow cylinder. The lateral surfaces of the hollow cylinder are under two inner and outer self-equilibrating distributed shear loadings. First, the stress fields due to these loadings are given for both infinite and finite cylinders. In the next step, the state of stress in an infinite hollow cylinder with transversely isotropic material containing axisymmetric prismatic and radial dislocations is extracted from part I paper. Next, using the distributed dislocation technique, the mixed mode crack problem in finite cylinder is reduced to Cauchy-type singular integral equations for dislocation densities on the surfaces of the cracks. The problem of a cracked finite hollow cylinder is treated by cutting method; i.e., the infinite cylinder is cut to a finite one by slicing it using two annular axisymmetric cracks at its ends. The cutting method is validated by comparing the state of stress of a sliced intact infinite cylinder with that of an intact finite cylinder. The paper is furnished to several examples to study the effect of crack type and location in finite cylinders on the ensuing stress intensity factors of the cracks and the interaction between the cracks

Axisymmetric planar cracks in finite hollow cylinders of transversely isotropic material: part I—dislocation solution for infinite cylinders

This paper presents the solution for the crack tip stress intensity factors of a system of coaxial axisymmetric planar cracks in a transversely isotropic infinite hollow cylinder. The cylinder is under uniform axial tensile loading at infinity. First, the state of stress in an infinite hollow cylinder with transversely isotropic material containing axisymmetric prismatic and radial dislocations is studied. To this end, the solutions are represented in terms of biharmonic stress functions. Next, using the distributed dislocation technique, the mixed mode crack problem is reduced to Cauchy-type singular integral equations for dislocation densities on the surfaces of the cracks. The dislocation densities are employed to determine stress intensity factors for axisymmetric interacting cracks. For validation, the problems including one single crack in an infinite hollow cylinder with a circumferential edge crack or an annular crack are reexamined