in design of defense structures, concrete are often used to provide protection against incidental dynamic loadings such as the impact of a steel projectile. in the present study, a new analytical model is proposed to predict penetration depth into concrete targets by ogive nose projectile. hence, to ­ develop the model and simulate penetration of high velocity ogive-shape nose steel projectiles...

This is a 3-month-old infant with a diagnosis of acute cholecystitis presenting with projectile vomiting and no fever and no abdominal pain.

In this paper, our main objective is to present the use of Microsoft Software Excel 2007/2003 for teaching college and university level curriculum in science and engineering. In particular, we discuss two interesting and fascinating examples of interactive applications of Microsoft Excel targeted for undergraduate students in (1) computational physics and physics education, and in (2) computer ...

The analysis of the projectile effective charges and the stopping power with high intensity ion beams is of great fundamental interest. In contrast to the projectile charge state analysis outside the interaction volume (e.g., by means of particle detectors), the information about the projectile mean charge inside matter has to be obtained in an indirect manner, namely from the projectile radiat...

A study of the kinematics of the α-d coincidences in the Li + Co system at a bombarding energy of Elab = 29.6 MeV is presented. With exclusive measurements performed over different angular intervals it is possible to identify the respective contributions of the sequential projectile breakup and direct projectile breakup components. A careful analysis using a semiclassical approach of these proc...

This work performs the analysis and simulation investigations of penetration behaviors of chisel-shape projectile. In analysis, the projectile is assumed to be a rigid body and the target plate is elastic-plastic material. By introducing the velocity potential function, the velocity field in target is first obtained. Then, the momentum equation is solved for determining the pressure and stress ...

This paper describes a new multidisciplinary computational study undertaken to model the flight trajectories and the free-flight aerodynamics of both a finned projectile at supersonic velocities and a spinning projectile at subsonic speeds with and without aerodynamic flow-control. Actual flight trajectories are computed using an advanced coupled computational fluid dynamics (CFD)/rigid body dy...

The conversion of kinetic energy into target-like fragment excitation and orbital angular momentum into fragment spin has been studied in the reaction 333 MeV Si with ' 'Ta. The light charged particles were detected in a small, highly segmented, 4m phoswich detector system placed in the spin spectrometer, a 4m NaI array which served as a neutron and gamma detector. Multiplicities of light charg...

Calculations of the breakup of B and Be are performed with the aim of analyzing their sensitivity to the projectile description. Several potentials adjusted on the same experimental data are used for each projectile. The results vary significantly with the potential choice, and this sensitivity differs from one projectile to the other. In the B case, the breakup cross section is approximately s...

Direct or Eley-Rideal reactions between energetic N^{+} and O^{+} projectiles and O atoms, adsorbed onto Pt and Pd surfaces, are studied experimentally at incidence energies between 20 and 200 eV. The exit energies of the diatomic molecular products NO and O_{2} depend linearly on the incidence energy of the corresponding projectiles. A reaction mechanism is proposed, where the incident project...