The paper deals with the well–posedness of the problem 8 >< >: utt −∆u = 0 in R× Ω, utt = kuν on R× Γ, u(0, x) = u0(x), ut(0, x) = v0(x) in Ω, where u = u(t, x), t ∈ R, x ∈ Ω, ∆ = ∆x denotes the Laplacian operator respect to the space variable, Ω is a bounded regular (C∞) open domain of RN (N ≥ 1), Γ = ∂Ω, ν is the outward normal to Ω, k is a constant. We prove that it is ill–posed if N ≥ 2, wh...

Let M either be a closed real analytic Riemannian manifold or a closed C∞-Riemannian surface. We estimate from below the volume of a nodal domain component in an arbitrary ball, provided that this component enters the ball deeply enough.

The article presents the steps required to reconstruct a 3D trajectory of a golf ball flight, bounces and roll in short game. Two video cameras were used to capture the last parts of the trajectories including the bounces and roll. Each video sequence is processed and the ball is detected and tracked until is stops. Detected positions from both video sequences are then matched and 3D trajectory...

Recently there has been great deal of interest in making system that enables an audience to view sports event from any arbitrary viewpoint. The rapid development of networks and computers will soon make it possible to provide a form of real-time video that allows the viewer to select any desired view of the action. This paper introduces a novel method for generating an arbitrary view of a scene...

Several methodologies have been implemented with the intent of preventing or reducing formation biofilms on indwelling urinary devices. The use carbon nanotubes (CNTs) in biomedical field has increasing, particularly production antimicrobial and antifouling coatings. Despite their proven properties, as coating materials for tract devices (UTDs) is still poorly documented. In present work, CNT/p...

A method of fabrication AAO film in 0.3 mol/L H2C2O4 by adding 1,2-propanediol(PROH) and at sub-zero temperature has been proposed. The electrochemical characteristics the barrier porous layers films before after pore-filling are examined using impedance spectroscopy (EIS). It is shown that high medium frequency range corresponds to layer properties low ranges reflect sealed properties. calcula...

this paper concerns the design and analysis, of a ball type continuously variable transmission, (b-cvt). this b-cvt has a simple kinematic structure, and same as a toroidal cvt, transmits power by friction on the contact points between input and output discs, that are connected to each other by balls. after, a brief introduction of our b-cvt structure, the performance and traction efficiency of...

a method of table tennis performance analysis is proposed. The key features of the proposed method is (1) the data collecting operation does not require a lot of time nor heavy workload, (2) providing performance indicators for the scoring possibility depends on the shot number. In the analysis, shot number of scoring is collected and used to automate collecting other kinds of data based on the...

the influence of different lateral compaction methods for the obturation quality, as well as the time spent for the procedure. Thirty root canals of freshly extracted single-rooted human teeth were prepared with the ProTaper system up to F5 instrument and filled with gutta-percha and AH Plus sealer by the lateral compaction technique. The teeth were divided into 3 groups (n=10) in accordance wi...