The conditional entity is one of the major jurisprudential issues that is very important for its accurate understanding of the judgments it handles. One of the most successful ways to understand the concept of words is to examine the types of references that necessitate research on the nature of the condition. In this paper, with a comprehensive overview and comprehensive review of jurisprudential sources, all the effective directions in the division of the criteria (divisibility criteria) have been established and attempts have been made to determine the extent of these categories by addressing the terminology and the expression of the equipment, the history and effects of their acceptance. Accurately explained. Based on the findings of this research, the following are the most important and over-fulfilling conditions: the condition of the consent of the contract, the condition against the nature of the contract, the condition of the opposition to the source, the condition against the customary work of the contract, the condition against the use of the contract, the conditional, the customary (ordinary), religious and Rational condition of the verb, description and purpose of the verb, implicit, elemental, collusion and explicit, in each case based on the subject, the type of ruler of credit, the necessity of respect, and the mentioning and not mentioning in the text of the contract, the split is conditioned.

One of the important issues in the production of concrete is environmental variability that affects the concrete and elements constructed from this material. Due to the importance of different characteristics of concrete in short- and long-term conditions, this article aims to investigate the influence of initial temperature conditions of self-compacting concrete on its long-term characteristics and determine the initial optimal temperature of concrete. For these purposes, several experiments under three temperature conditions of 5, 20, and 40 degree-of-Celsius were conducted to evaluate the rheology and mechanical properties of fresh concrete in the range of 7 and 28 days. In these experiments, alternative mineral admixtures of cement such as micro-silica, fly ash, and zeolite were used to build the concrete specimens. Results demonstrate that the mechanical properties of the specimens increase with increasing initial temperature in the short term, while such properties significantly decrease in the long term compared to the specimens constructed under lower initial temperature. Moreover, the fluidity of self-compacting concrete increases with increasing initial temperature.

Bank contracts are concluded either absolutely or conditionally. Most contracts are concluded conditionally. Therefore, in most contracts, observance of rules of sharia in banking affairs, which is today subject of much attention, depends on knowledge of fiqh and legal nature of conditions and their function. Conditions are divided into many categories based on different criteria, and accurate knowledge of each of such categories is very important, and also, it is necessary to study effect of each separately. Such study would range from the study of how to accurately conclude a contract containing each of categories of conditions to consideration of the effect of violation of conditions. Such study must be done carefully and with diligence without ignoring complexities of certain matters. Indulgence and lack of diligence in sharia rules-based banking operation not only undermines Islamic bases of economy but also cause many to doubt the Islamic bases of economy and lead them to falsely believe that observance of rules of fiqh only apparently changes bank operations without making any substantial changes, thus making people confused and surprised with the never answered question why so much must be spent on such superficial and ultimately ineffective changes.

The purpose of this research is to evaluate a ground test bed of an orbital transmission engine with pre-evacuation of the engine's internal space. In the usual tests on the ground, the initial pressure of the engine is atmospheric pressure. While during the orbital mission, the internal space of the engine may be in the vacuum pressure. Therefore, to ensure the proper performance of internal ballistics, it is necessary to test the performance by pre-evacuating its internal space. In this research, first, the suitability of an exhaust diffuser for this type of test is investigated numerically. Then, the unsteady numerical simulations have been done by applying the pressure-time profiles of the engine as the boundary condition of the inlet pressure. Investigations show that the two phenomena of flow being supersonic in the diffuser at very low engine pressures and the discharge of the return flow to the vacuum chamber prevent the significant influence of environmental conditions on the flow inside the nozzle. So, from the initial moment to the stable working of the diffuser, the flow in the first half of the nozzle is in the supersonic state. Therefore, the internal ballistics of the engine is evaluated independently of the conditions of the outside environment.

In this study, the effect of initial principal stress rotation on anisotropic behavior of medium dense Firoozkuh sand in the drained condition was studied. Hollow Cylindrical Apparatus (HCA) was used to conduct the tests in the drained condition on the medium dense specimens of Firoozkuh sand. All specimens were prepared with a height of 200 mm and outer and inner diameters of 100 and 60 mm, respectively, using dry air pluviation method. The specimens were consolidated subjected to the anisotropic initial stresses with different directions (\alphac). During consolidation, stress ratio (Rc=\sigma′ 1c/sigma′ 3c=2) was maintained equal to 2. Specimens were consolidated under an anisotropic condition in which the rotation of initial principal stresses was set to a constant value varying from zero to 450. The specimens were sheared under different inclinations of principal stress increments (\alpha\delta\sigma) varying from zero to 450. In these tests, the direction of principal stress increments (\alpha\delta\sigma) may be not equal to the direction of the principal stress due to anisotropic stresses, applied in the consolidation phase. Generally, the results showed a decrease in the shear strength of sand by increasing (\alpha\delta\sigma). The results showed that the stress-strain behavior and shear strength of medium dense sand were influenced by the inclination of initial principal stresses. Initial anisotropic principal stresses caused initial shear strains which softened the stress-strain behavior of sand. Therefore, the shear modulus and shear strength for anisotropic consolidated specimens were less than that of the isotropic consolidated specimens. The anisotropic response of medium dense sands was observed to be governed by (\alphac). It was found that the shear modulus and shear strength of sand relatively decreased and anisotropy coefficient significantly increased when anisotropic initial stress and increments of principal stresses were in the same direction. The effect of initial stress state on the shear modulus was more noticeable than that on the shear strength of sand.

In this work, the effects of injection initial conditions on displacement and rotation of flammable region in a twophase fuel–air cloud in open atmosphere have been studied numerically. Investigating the internal conditions of the cloud, we recognize the flammable region and study the effects of injection velocity, droplet initial size, and temperature on the behavior of this region. This study can designate the proper position for successful ignition. Validation was made by comparing the numerical and experimental results. Results show increasing injection velocity and initial size of droplet decreasing droplet initial temperature, increase the rotation of flammable region.