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Occlusion of cerebrospinal fluid path increases the pressure exerted by the liquid on the walls of the ventricles and ultimately leads to hydrocephalus. This research investigated a numerical index to diagnosis the non-communicating hydrocephalus disease. At first, the diagram of velocity in Sylvius aqueduct of a healthy subject, which was obtained through a 3D FSI analysis, was compared to the similar velocity diagram extracted from CINE-PC-MRI of the same subject. Then after ensuring that the two diagrams coincide with each other, was to make sure that the problem assumptions and solution are correct. The Reynolds number in Sylvius aqueduct of a healthy subject was less than 275.7 and the maximum pressure of CSF was 616.3 Pa. Further, the conditions of ventricular system in a patient suffering from non-communicating hydrocephalus were modeled. The maximum pressure has increased to 2958.5 Pa. Regarding the cause of hydrocephalus, the maximum pressure of CSF on the brain tissue in Sylvius aqueduct was introduced as an index to assess non-communicating hydrocephalus. Finally calculated CSF pressure data of this study were compared to the data obtained through the lumber puncture (LP) test and it was found that these values are proportional to each other. Based on this finding, the CSF pressure obtained by LP test was introduced as a practical numerical index for diagnosis of non-communicating hydrocephalus.

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In the recent years, wind energy had a faster growth compared with the other renewable energies. The interaction between fluid and structure becomes more important as the wind turbine size and its power production capacity increases. In the present research, the effect of wind speed and blade materials on static deformation of a small size horizontal axis wind turbine blade has investigated. The shaft torque and root flap bending moment values obtained from simulation are in a good agreement with experimental data. Results demonstrated that the deformation of the blade increases as the wind speed grows although the increase rate has declined in the mean wind speed range because of the occurrence of separation phenomenon on the blade surface. The effect of blade components materials on blade deformation was investigated and the least deformed configurations were introduced. The thickness of the designated blade components has been investigated by means of the maximum strain theory. The final thickness of the skin, spur and root was estimated by 2.1 mm, 2.8 mm and 10 mm respectively which are 30% less than the primary one.

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Stress urinary incontinence (SUI) is characterized by the involuntary transurethral leakage of urine caused by an increase in abdominal pressure in the lack of an adequate bladder‎ ‎contraction that raises the vesical pressure to a level that exceeds urethral pressure‎. ‎Adult women are most commonly affected by SUI which is believed to be caused in part by‎ ‎injuries to the pelvic floor sustained during childbirth‎. ‎Despite the large number of women affected by SUI‎, ‎little is known about the mechanisms associated with the maintenance of urinary continence in women‎. ‎The work in this ‎research ‎focuses on studying the behavior of the bladder and the dynamics of the urine during an increase in abdominal pressure like a cough‎. ‎The computational model is developed by using the Finite Elements Method (FEM) and Fluid-structure interaction (FSI) techniques. ‎The results show a good accordance between the clinical data and predicted values of the computational models. ‎Simulated pressure is more accurate in the model in which non-linear material properties are utilized. The results of the computational methods indicate that by using numerical techniques and simplification of the physics of biological systems, clinical results can be reached in virtual environments in order to understand pathological mechanisms.

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How to provide sustainable and clean sources of energy is probably the most vital question of our world today. The population growth and technology development are leading to an increase in the world energy demand and fast depletion of fuel resources. Our environment is facing critical challenges and there are serious uncertainties with the future availability of fossil fuel. The only possible remedy is to increase the share of clean and renewable energies in total energy use and to make our technology more energy efficient. Marine and offshore renewable energies are from the cleanest types that are available from the boundless energy of fluid flow in the oceans, seas, rivers and channels. In the present study, the wave energy absorption in a channel has been studied. A plate with infinite length and finite width and thickness that is placed at the bottom of a channel has been investigated to absorb the energy of gravity waves. The plate is on a viscoelastic foundation which displays linear behavior. The coupled equations of fluid and plate have been investigated to calculate the vibration characteristics of fluid surface and plate. Subsequently, a proper analysis has been done for the plate's ability to absorb wave energy.