This paper focuses on hydrodynamic modeling and control of spheroidal underwater vehicle. The vehicle considered in this is appendage free unstable. Water jet propulsion system used dynamics the highly unstable due to munk moment. shape robot nuclear reactor inspection, port security defence ocean surveillance where external appendages are not required. A new innovative technique, Sliding mode ...

Torpedoes play an irreplaceable role in naval warfare; therefore, it is significant to study the dynamic response of direct navigation torpedoes. In order torpedoes under different Munk moment coefficients, equation established based on momentum theorem and theorem. The linear motion mathematical model obtained. relationship between torpedo coefficient derived. straight-line moments established...

The optical properties of a grown gallium nitride (GaN) thin film on porous silicon (P-Si) substrate was investigated. A Photo-electrochemical etching method used to synthesize the Psi substrate, and physical deposition (pulsed laser deposition) 1064 nm Q-switch Nd: YAG with vacuum 10−2 mbar grow layer GaN prepared P-Si substrate. X-Ray diffraction displayed that has high crystalline nature at ...

The powders of Ca1–2xBi2xMo1–xGexO4 solid solutions weresynthesized by the conventional state method and investigated X–ray powder diffraction Raman spectroscopy. compositions crystallize in scheelite structure (sp. gr. I41/a) at 0 x 0.4, but traces bismuth germanates are detected scanning electron microscopy. = 0.5 composition contains several phases with BiVO4- type structures. spectroscopy d...

Indonesia is a country that has an area of sea three times larger than the land area. In line with rapid development, need for electricity also increasing. So great potential to produce alternative and environmentally friendly energy, namely Sea Wave Energy. Its continuous nature available all time. Many coastal areas in Indonesia, however, have not been utilized optimally.
 The purpose th...

Este artículo analiza la vertiente conceptual y plástica de los retratos post mortem efectuados por Gustav Klimt. Una labor que ejerce excepcionalmente, como otros pintores historia del arte, aunque el caso este artista es destacado abordarla desde campo profesional al personal. En aspecto, presente texto pone relieve significativos trabajos realizados Klimt, entre 1883 1912, tanto encargos pri...