BALANCING has been an important element of Saudi Arabia's foreign policy towards Iran following the Islamic Revolution in this country. This approach of the Kingdom of Saudi Arabia has been mainly influenced by the threat that its leaders perceive the Islamic Republic of Iran poses to them, a perception that has been reproduced almost continuously for four decades for various reasons. The type of BALANCING strategy, though, has been subject to change over time between internal and external BALANCING in different periods. This descriptive-analytical study was conducted to answer the question: "Why has the type of Saudi Arabia's BALANCING strategy against the Islamic Republic of Iran changed over the past four decades?" Drawing on the DYNAMIC BALANCING theory, and given the persistent threat that the leaders of Saudi Arabia perceive the Islamic Republic of Iran poses to them, the findings of this research  suggest that the change in Saudi Arabia's BALANCING strategy against the Islamic Republic of Iran is  caused  by the change in the  polarity in  the international system. Moreover, the tendency toward internal BALANCING has grown as multipolarity has arrived in this system.

Three-cylinder linear engines are designed to minimize, reduce fuel consumption and pollution. The disadvantages of this type of engine, heavy vibration inherent in them. This study aims to balance Threecylinder linear engines with a BALANCING shaft. First, the DYNAMIC analysis of these types of engines identifies unbalanced sources. The results of the DYNAMIC analysis showed that the inertial torque due to the reciprocating and rotational masses of three-cylinder linear motors is unbalanced. Therefore, DYNAMIC analysis of these types of engines identifies unbalanced sources. The results of the DYNAMIC analysis showed that the inertial torque due to the reciprocating and rotational masses of three-cylinder linear engines is unbalanced. Then, the analytical BALANCING of this type of engines with a BALANCING shaft was performed. The results of analytical BALANCING led to the extraction of an equation for the calculation of geometric and mass characteristics as well as the position of the BALANCING shaft in this type of engines. To test the performance of the BALANCING act performed analytically, the three-cylinder base motor with its BALANCING rod was simulated in GTPower software. The acceleration results of the engines mount were compared between the simulated model and the experimental test and there was a good agreement between them. Then, the results of the vibration level of the base engine with the BALANCING shaft designed analytically were compared with the results of the validated model. The results of the comparison showed that the performed analytical BALANCING has a good performance. Then, the crankshaft correction solution was presented using the balance factor and the possibility of eliminating the BALANCING shaft to balance the three-cylinder linear engines. To accept BALANCING in this way, the results of the acceleration level of the driver's seat rail are considered as acceptance criteria. The results showed that BALANCING of three-cylinder linear engines is possible by increasing the balance factor of the crankshaft and removing the BALANCING shaft.

A systematic and comprehensive analytical study, addressing a range of issues on the DYNAMIC performance of robot manipulators, was conducted in this paper. The robot chosen for this investigation is a PUMA 560 robot manipulator. Closed-form DYNAMIC models as well as the kinematic model of the PUMA 560 were developed and employed to facilitate the analysis of a robot's DYNAMIC performance. Then investigation was conducted on the effect of link counter BALANCING on the DYNAMIC performance of an articulated robot The investigation was conducted by comparing the robot's DYNAMIC performance with and without counter-BALANCING masses in order to visualize the extent of the effect of counter-BALANCING. Finally to evaluate the performance of the proposed method simulation test is carried out.

Objective: Reduced proprioception, Pain, changes in muscle activity patterns are sawn in PFPS. Balance is dependent on proprioception, visual, somatosensory and vestibular systems. So it is possible that balance be weaker in PFPS. The objectives of this study was the evaluation of the effect of patellofemoral pain on balance status of patients and comparing the balance between two groups.Anterior-Posterior, Medio-lateral and overall indexes were evaluated. Materials & Methods: The research design was nonexperimental (case-control) study and the sampling was nonpropability (Sample of Convenience). We measured balance on a Biodex Stability System. DYNAMIC stability test was used for evaluation in two groups. Results: Findings showed that balance indexes had difference between two groups.So that, overal index in close and open eye conditions had meaningful difference, but anterior-posterior and medial-lateral indexs did not show this difference. Conclusion: DYNAMIC balance is weaker in patients with patello – femoral pain than others. Its main causes are Reduce of proprioception & changes in muscle activity patterns.

In this article, a new stabilizing mechanism for a two wheel robot is proposed. Such systems, due to inherent instability, require DYNAMIC stabilization. The conventional method for stabilizing these robots is moving the base back and forth, to use its inertia effects. Therefore, such strategies drastically depend on the ground surface, besides the robot is not able to reconfigure its manipulator to do any desired task. These limitations reduce the capability of the robot to manipulate objects, and to perform accurate tasks. In order to omit these restrictions, in the developed mechanism, a reaction wheel is used. The proposed mechanism exploits the inertia moment of reaction wheel to stabilize motion of the robot. Therefore, since there is no interaction between the reaction wheel and the ground surface, by using this mechanism there would be no concern about the surface that the robot moves on that. Also, manipulator of the robot can track the given trajectories, without considering stability limitations. In order to show the performance of proposed mechanism, a verified DYNAMICs model of the robot is used and the control algorithm with various initial conditions is simulated.

The purpose of this paper is to present a new type of DYNAMIC BALANCING system, having a driving solution of the rotating part based on magnetic interactions. The magnetic system also plays the role of an elastic bearing. The structure has some important advantages: an easy to design and build mechanical system; no influence of the environmental factors on the measuring accuracy; low production costs; no direct transmission from the driving motor to the rotor that has to be balanced. In the first part of the article it is presented the technical solution which allows the DYNAMIC BALANCING evaluation depending on the radial displacement be-tween two disks with permanent magnets, creating a magnetic coupling. It is presented the results obtained on the experimental way, that validated both the numerical simulation as well as the analytic calculation. Using a 2D model, the resultant magnetic force was analytically calculated, whose value depends on the misalignment of the balanced part, against the equilibrium position. Due to the specific geometry, to validate the 2D analytical calculation model, it was necessary to create a FEM model of the magnetic system. A simulation was performed to evaluate the dependence between the radial displacements and the magnetic forces. It was used a 3D simulation software, specific for these kind of problems - the IN-FOLYTICA software. The final results show that there is a similarity between 2D analytical calculation model, 3D simulation and practical measurements. In the second part of the article it is presented a practical application for this type of BALANCING system, used to build a two plane DYNAMIC BALANCING machine for card an shafts. It is also shown how it can be eliminated the disturbing unbalance introduced by the clamping system of the balanced part using a software method.

Software-Defined Networking (SDN) has been recognized as an efficient approach in the field of communication technology, aiming to improve the performance and efficiency of computer networks, thus reducing costs. One of the key challenges in SDN is load BALANCING among nodes. Solving this challenge leads to improved response time and network performance. Nowadays, various methods have been proposed for load BALANCING in SDN, but they have not yet reached the ideal state. In this article, a new method is presented to enhance load BALANCING and reduce response time. This method utilizes multi-objective evolutionary algorithms and fuzzy weighting. In the proposed method, factors such as bandwidth, traffic status, link buffer, and desired router are taken into account, and the best path and router with desired load BALANCING for information flows are selected with the minimum time. One prominent advantage of this method is the possibility of performing load BALANCING automatically without the need for human intervention. Experimental results demonstrate that the proposed method shows a significant improvement of approximately 14.8% in response time compared to other methods, while maintaining load BALANCING in SDNs. By using the proposed method, in addition to improving service quality and user satisfaction, response time will also be enhanced. In summary, the proposed method is introduced as a viable approach in SDNs and exhibits superiority over existing methods.

Designing the self-BALANCING two-wheeled mobile robots and reducing undesired vibrations are of great importance. For this purpose, the majority of researches are focused on application of relatively complex control approaches without improving the robot structure. Therefore, in this paper we introduce a new two-wheeled mobile robot which, despite its relative simple structure, fulfills the required level of self-BALANCING without applying any certain complex controller. To reach this goal, the robot structure is designed in a way that its center of gravity is located below the wheels' axle level. The attention is more paid to obtaining a self-BALANCING model in which the robot’s arms and other equipment follow relatively low oscillations when the robot is subjected to a sudden change. After assembling the robot using the Sim-Mechanics toolbox of Matlab, several simulations are arranged to investigate the robot ability in fulfilling the required tasks. Further verifications are carried out by performing various experiments on the real model. Based on the obtained results, an acceptable level of BALANCING, oscillation reduction, and power supply is observed. To promote the self-BALANCING two-wheeled mobile manipulator, its platform is modified to climb high obstacles. In order to obtain this aim, some transformations are done in mechanical aspects like wheels, arms and main body without any increase in DOFs. The robot is supposed to follow proposed motion calculated according to stability criteria. The kinematic equations are utilized to find a possible motion. In a DYNAMIC simulation, the robot ability in passing over an obstacle is verified.