introduction: aphasia is a common manifestation of stroke and evaluation of relationships of aphasia and brain topography could lead to better understanding of cognitive neurophysiology. methods: 100 stroke patients with aphasia admitted in valie-asr hospital, khorasan since april 2003 were enrolled in this prospective cross-sectional study. diagnosis of stroke and aphasia was made by a neurolo...

Through the release of groundwater, most mountain rivers run year-round despite their small catchments and sporadic precipitation. This makes ranges important sources reliable freshwater for downstream populations in many parts world. However, due to a lack ground instrumentation, little is known about groundwater dynamics mountainous landscapes. Recent research has shown that amount moisture t...

Analytical estimates of the rate at which energy is extracted from the barotropic tide at topography and converted into internal gravity waves are given. The ocean is idealized as an inviscid, vertically unbounded fluid on the f plane. The gravity waves are treated by linear theory and freely escape to z 5 `. Several topographies are investigated: a sinusoidal ripple, a set of Gaussian bumps, a...

Bone resorption by osteoclasts depends on the assembly of a specialized, actin-rich adhesive 'sealing zone' that delimits the area designed for degradation. In this study, we show that the level of roughness of the underlying adhesive surface has a profound effect on the formation and stability of the sealing zone and the associated F-actin. As our primary model substrate, we use 'smooth' and '...

Calculations are presented of the rate of energy conversion of the barotropic tide into internal gravity waves above topography on the ocean floor. The ocean is treated as infinitely deep, and the topography consists of periodic obstructions; a Green function method is used to construct the scattered wavefield. The calculations extend the previous results of Balmforth et al. for subcritical top...