Heyelanlar doğal afet sayılarının türlerine göre dağılımı dikkate alındığında %45 ile en sık karşılaşılan doğa olaylarıdır. Heyelan çözüm projelerinin yapılabilmesi için heyelan sırasında kayma düzleminde oluşan rezidüel dayanımı parametrelerinin gerçeğe yakın şekilde tahmin edilmesi gerekir. Söz konusu parametreler, tekrarlı direkt kesme ve halka deneyleri yapılarak tayin edilebildiği gibi, ge...

We study the effect of particle cohesion on the steady state shear strength of a granular material. For cohesive powders, the steady state shear loci (termination loci) from DEM simulations are nonlinear with a peculiar pressure dependence due to the non-linear increase of contact adhesion with pressure in the contact model. Physical experiments are carried out on fine limestone powder in the d...

The nature of dynamo action in shear flows prone to magnetohydrodynamc instabilities is investigated using the magnetorotational dynamo in Keplerian shear flow as a prototype problem. Using direct numerical simulations and Newton's method, we compute an exact time-periodic magnetorotational dynamo solution to three-dimensional dissipative incompressible magnetohydrodynamic equations with rotati...

In soft materials, self-assembled nanoscale structures can allow new functionalities but a general problem is to align such local structures aiming at monodomain overall order. In order to achieve shear alignment in a controlled manner, a novel type of rheo-optical apparatus has here been developed that allows small sample volumes and in situ monitoring of the alignment process during the shear...

visceral leishmaniasis (vl) is one of the most important parasitic diseases which is endemic in different parts of iran. serological studies were conducted by direct agglutination test (dat) on 12144 human serum samples, collected from four geographical zones of iran. sero prevalence, geographical distribution, clinical signs and symptoms for human visceral leishmaniasis based on dat for the pe...

BACKGROUND While the importance of fluid dynamical conditions is well recognized in the growth of biofilms, their role during bacteremia is unknown. We examined the impact of physiological fluid shear forces on the development of multicellular aggregates of Klebsiella pneumoniae. METHODS Wild-type and O-antigen or capsular mutants of K. pneumoniae were grown as broth culture in a Taylor-Couet...