Introdouction: An exact knowledge of the anatomical variations of the paranasal sinuses (PNS) is critical for surgeons performing endoscopic sinus surgery and for radiologists involved in making preoperative evaluations. An important aspect is the determination of correlation between the anatomical variations of PNS and the presence of chronic rhinosinusitis (CR). Cone-beam computed tomograph...

It is a fundamental problem to construct accurate dense correspondences between two images. Despite the efforts and promising methods handling relatively small motion, one remaining challenge is induced by large and complex nonrigid motion. Aiming at this challenge, the new method proposed exploits the mutual boosting between the variational flow and the nearest-neighbor field (NNF). The propos...

results out of the 129 elderly participants, aged between 60-87 years (mean: 66.71 ± 6.21), males constituted 58.1% (n = 75) of patients and female were 41.9% (n = 54). normal variations of oral mucosa were observed in 62% (n = 80) of patients, while 44.2% (n = 57) had oral mucosal lesions. normal variations were significantly associated with smoking (or = 1.2), while denture wearers were at hi...

We study the following quasilinear problem with nonlinear boundary condition −Δpu − λa x u|u|p−2 b x u|u|γ−2, in Ω and 1 − α |∇u|p−2 ∂u/∂n αu|u|p−2 0, on ∂Ω, where Ω ⊆ R is a connected bounded domain with smooth boundary ∂Ω, the outward unit normal to which is denoted by n.Δp is the p-Laplcian operator defined byΔpu div |∇u|p−2∇u , the functions a and b are sign changing continuous functions in...

Estimating the shape and appearance of a three dimensional object from flat images is a challenging research topic that is still actively pursued. Among the various techniques available, Photometric Stereo (PS) is known to provide very accurate local shape recovery, in terms of surface normals. In this work, we propose to minimise non-convex variational models for PS that recover the depth info...

A model for qualitative reasoning about intervals on a cyclic time has been recently proposed by Balbiani and Osmani (Balbiani & Osmani 2000). In this formalism, the basic entities are intervals on a circle, and using considerations similar to Allen’s calculus, sixteen basic relations are obtained, which form a jointly disjunctive and pairwise distinct (JEPD) set of relations. The purpose of th...