The GOMOS Steering Front Assembly (SFA) is essentially a two axis pointing system. It comprises of a mirror (SMU), a Mechanism Drive Electronics unit (MDE) and a Steering Front Mechanism (SFM). Unlike many other pointing systems the SFA must maintain a line of sight stability of better than 3 microrads, while subjected to considerable microvibration disturbances from the host spacecraft. This p...

Abstract In order to improve the efficiency of PCB (Printed Circuit Board) capacitor plug-in, reduce labor input and accuracy a plug-in assembly manipulator was designed. The mainly composed X-axis module, Y-axis module Z-axis module. mechanical gripper could adjust distance between two grippers meet needs different capacitance sizes. By adopting double z-axis design, work rectangular coordinat...

Some X-shaped radio galaxies show a Z-symmetric morphology in the less luminous secondary lobes. Within the scenario of a merger between two galaxies, each hosting a supermassive black hole in its center, this structure has been explained before: As the smaller galaxy spirals towards the common center, it releases gas to the ISM of the larger active galaxy. The ram pressure of this streaming ga...

BACKGROUND AND PURPOSE Radiation dose in temporal bone CT imaging can be high due to the requirement of high spatial resolution. In this study, we assessed whether CT imaging of the temporal bone by using an ultra-high-resolution scan mode combined with iterative reconstruction provides higher spatial resolution and lower image noise than a z-axis ultra-high-resolution mode. MATERIALS AND MET...

sgn(z) = ( 1 if Re(z) > 0, −1 if Re(z) < 0 for z ∈ C lying off the imaginary axis. Next, the matrix sign function is given by sgn(M) = U sgn(Λ)U−1 where M ∈ C n×n is a Hermitian matrix with no eigenvalues on the imaginary axis. The unitary n×n matrix U has column vectors equal to the orthonormal eigenvector basis of C n determined byM , and the diagonal n×n matrix Λ has components equal to the ...

Background: This study evaluates dosimetric and spatial variations in inter&ndash;fraction applicator positioning in high dose rate (HDR) brachytherapy. Materials and Methods: This study includes 25 retrospective patients of carcinoma of the cervix. Each patient received 5 fractions of HDR intracavitary brachytherapy. High Risk-Clinical Target Volume (HR-CTV) were drawn on CT images. First impl...

In our paper referred to above we claim to enumerate all …nite primitive linear groups of prime degree r over C with a nonabelian socle. However, the case where the socle is imprimitive was overlooked. In the present paper we deal with this case to complete the classi…cation. 2000 Mathematics Subject Classi…cation: 20H20 20C15 20C33 In the paper referred to above, we state a theorem (Theorem 1....

We have considered the scattering of a plane wave by a penetrable acoustic circular cylinder. The boundary conditions are continuity of the total pressure and the total velocity. The wave speed and density of the target are different from that of the surrounding medium.We investigated the performance of higher-order SRCs up to L4 operator in two dimensions. We assume that in the rectangular Car...