The threshold pressure is critical to characterizing multi-phase nonlinear flow through tight porous media under effective stress. Due the complex and heterogeneous pore structures, essential controls on of are not determined. In this study, based fractal theory, a theoretical model for gas–water two-phase proposed. derived considers stress, capillary pressure, boundary layer. predicted from de...

background:   many of the patients with tethered cord syndrome (tcs) are admitted because of neurological symptoms, while some are admitted because of their orthopedic, urologic, anorectal, and dermatologic manifestations.consequently, this study aimed to evaluate the importance of early diagnosis and treatment of tethered cord syndrome on patient outcome. methods: fourty-three patients who und...

in this paper energy bands and berry curvature of graphene was studied. desired hamiltonian regarding the next-nearest neighbors obtained by tight binding model. by using the second quantization approach, the transformation matrix is calculated and the hamiltonian of system is diagonalized. with this hamiltonian, the band structure and wave function can be calculated. by using calculated wave f...

In this paper we will generalize  some of known results on the tight closure of an ideal to the tight closure of an ideal relative to a module .

purpose: to evaluate the effect of stenosis nature on success of silicone intubation for nasosolacrimal duct stenosis (nlds) in adults (patent nasolacrimal duct with resistance to positive-pressure irrigation) methods: an interventional case series of consecutive monocanalicular and bicanalicular silicone intubation for nasolacrimal duct stenosis in adults were reviewed. the severity of the ste...