We present high-resolution soft-X-ray spectra of the prototypical Seyfert 2 galaxy, NGC 1068, taken with the XMM-Newton Reflection Grating Spectrometer (RGS) and the Chandra Low Energy Transmission Grating Spectrometer (LETGS). Its rich emission-line spectrum is dominated by recombination in a warm plasma (bright, narrow radiative recombination continua provide the " smoking gun "), which is ph...

This is an expository article whose main aim is to introduce nor~nal affine semigroups and its links with other areas such as graph tlleory, linear programming and polyhedral geometry. As an application we derive the classical and generalized ~narriage theorems. 1 Introduction Let A = (a i j) be an integral matrix of order n x q with nonzero distinct columns and let A = {vl,. .. ,v,) be the set...

Metal spinning as a kind of manufacturing process has capability to shape hollow components. In present work shear spinning process is used to formplates into conical shapes. Moreover, the aim of this research is to demonstrate the impact of the process parameters (i.e. feeding rate and spindle speed) on wall thickness. This approachwas done by experimental and finite elements method. The resul...

To determine the presence of cone or rod cyclic GMP phosphodiesterase (EC 3.1.4.17) in the mammalian pineal, extracts from adult rat and bovine pineals were injected onto a Mono Q anion-exchange HPLC column and eluted with an NaCl linear gradient. Fractions were immunoadsorbed with monoclonal antibodies specific to rod and cone phosphodiesterases (ROS-1) and to calmodulin-phosphodiesterase comp...

In order to study the possibility of aerodynamic optimization base cavity for slender body, influence with non-cylindrical shape, which is different from traditional column one, investegated by numerical method in paper. The supersonic flow field same body two sorts unconventional cavity, half truncated-cone and column, simulated axisymmetric Navier-Stokes equations. Distribution Mach Number (M...

The structure of the cibarial armature of mosquitoes has been found to be useful for taxonomic identification. We used a scanning electron micrograph to examine the cibarial armature of 4 of 5 species in the Anopheles dirus complex existing in Thailand: Anopheles dirus Peyton & Harrison, and An. cracens Sallum & Peyton, An. scanloni Sallum & Peyton, and An. baimaii Sallum & Peyton. In all speci...

The conical-cylindrical shell is prone to stress concentration in the convex cone position under action of deep-sea pressures. This results unidirectional or bidirectional positive tensile stresses on surfaces shell. a large, welded structure. Welding residual was generated at cone-column joint position, resulting high-stress this location. Under both welding and seawater pressure, cracks easil...