Catamaran added V-like center bow (INCAT) is investigated as a wave-piercing vessel to decrease vertical acceleration and diminish slam events during sea-keeping operation. The catamaran and the vessel bow were modeled and the vertical acceleration of model was validated with experimenal test. The geometry of V-like center-bow such as slope of center bow and elevation from demi-hulls was optimi...

A general theoretical study of the dynamics of ions interacting with multiple elec-trostatic waves, propagating perpendicularly to a uniform magnetic field, is performed. For appropriately chosen frequencies and wavenumbers we discover a new nonlinear phenomenon of coherent acceleration (or deceleration) which energizes (or extracts energy from) ions. Ions whose initial energies are below the l...

The plasma wake-field mechanism can be used to couple energy at a high rate from a bunched electron beam into a plasma wave. We will present results from the Fermilab A0 facility where a beam with an initial energy of 14 MeV passes through the plasma to emerge with a much broader energy spread, spanning from a low of 3 MeV to a high of over 20 MeV. Over the 8 cm lenth of the 1014 cm 3 plasma, t...

Doppler waveforms of the human fetal ductus arteriosus and the branch pulmonary artery are distinct in their shape and might reflect fetal cardiovascular hemodynamics and vessel wall characteristics. The waveform of ductus arteriosus had two peaks, a higher one in systole and a lower one in diastole. Both peaks had slow acceleration and deceleration and looked like two narrow base isosceles tri...

The electron acceleration, in a laser wakefield accelerator, controlled through plasma density inhomogeneity is studied on basis of 2.5-dimensional particle-in-cell simulation. acceleration requires concordance the scale length and shift accelerated bunch relative to wake bubble during acceleration. This paper considers excitation with equal free electrons metals, solid-state (the original idea...

The theory of shock acceleration predicts the maximum particle energy to be limited only by the acceleration time and the size (geometry) of the shock. This led to optimistic estimates for the galactic cosmic ray energy achievable in the SNR shocks. The estimates imply that the accelerated particles, while making no strong impact on the shock structure (test particle approach) are nevertheless ...