introduction: endoscopic sinus surgery is a common procedure performed by otolaryngologists. this study evaluated the efficacy of intravenous (iv) tranexamic acid (ta) on hemorrhage  in patients undergoing elective endoscopic sinus surgery (ess).   materials and methods: the present study was performed in 170 patients scheduled for ess surgery under general anesthesia in order to examine the ef...

0 ∇ · e−(t−s)AP (u⊗ u)(s) ds, for prescribed initial velocity a(x) = (a1(x), . . . , an(x)), x = (x1, . . . , xn) ∈ n , and unknown velocity u(x, t) = (u1(x, t), . . . , un(x, t)). Here, A = −∆ is the Laplacian on n ; {e−tA}t 0 is the heat semigroup; P = (Pjk) is the bounded projection onto divergence-free vector fields; u ⊗ v is the matrix with entries (u ⊗ v)jk = ujvk; ∇ = (∂1, . . . , ∂n) wi...

Let X be a complex Banach space and let J : X → X∗ be a duality section on X (i.e. 〈x, J(x)〉 = ‖J(x)‖‖x‖ = ‖J(x)‖2 = ‖x‖2). For any unit vector x and any (C0) contraction semigroup T = {e tA : t ≥ 0}, Goldstein proved that if X is a Hilbert space and if |〈T (t)x, J(x)〉| → 1 as t → ∞, then x is an eigenvector of A corresponding to a purely imaginary eigenvalue. In this article, we prove the simi...

Thermal asperity (TA) causes a major problem in data detection process. Without the TA detection and correction algorithm, the system performance (even with perfect synchronization) can be unacceptable, depending on how severe the TA effect is. This paper proposes a new method to suppress the TA effects in perpendicular magnetic recording channels. The TA detection is a threshold-based approach...