A shaped charge is an explosive device used to penetrate thick targets using a high velocity jet. A typical shaped charge contains explosive material behind a conical hollow. The hollow is lined with a compliant material, such as copper. Extremely high stresses caused by the detonation of the explosive have a focusing effect on the liner, turning it into a long, slender, stretching jet with a t...

Geometric and material nonlinear behavior of slender webs in I-column girders having stocky flanges under the action of combined lateral and axial loads is investigated. Interaction curves corresponding to the application of compressive and shear loads at buckling and ultimate stages for both web plates and column sections are plotted. In addition, the effects of flange and web slenderness rati...

Flow induced vibrations are an important concern in the design of nuclear reactors. One of the possible designs of the 4th generation nuclear reactors is a lead-cooled fast reactor of which MYYRHA is a prototype. The combination of high liquid density, flow velocity, low pitch-todiameter ratio and the absence of grid spacers makes this design prone to flow induced vibrations. Although most vibr...

A non-linear second order ODE has some applications in engineering problems. In physics, it arises the modeling of flux a heated compressible fluid through long slender tube. this paper, we consider differential equation whose analytic solution cannot be obtained directly. Therefore, first find canonical transformations to rewrite terms variables by using Lie symmetry approach. We then reduce e...

Peniocereus striatus (Cactaceae) and Euphorbia cryptospinosa (Euphorbiaceae) both produce slender pencil-like stems with stomata restricted to series of furrows separated by bark-covered ribs. In each species, as the stems dehydrate, the ribs come together to close off the furrows. The unusual structure of these stems in two unrelated succulent genera is a remarkable example of evolutionary con...

Abstract: We consider the solvability of a hybrid model for the vibration of a vertical slender structure mounted on an elastic seating. The slender structure is modeled as a Rayleigh beam and gravity is taken into account. The seating and foundation block are modeled as rigid bodies connected by elastic springs with damping mechanisms. We show how an existence result for a general linear vibra...

Increased weight and, more recently, body mass index (BMI), have been suggested as risk factors for carpal tunnel syndrome (CTS). In an effort to determine the relative risk (RR) of obesity in the development of CTS, 949 patients who had an evaluation of the right upper extremity that included motor and sensory conduction studies of the median and ulnar nerves were reviewed. Of these patients, ...

Early in an infection the bloodstream forms of the African trypanosome Trypanosoma brucei brucei are long, slender and rapidly dividing. Later, non-dividing, short, stumpy forms may be found. In this report we described biochemical differences between the two parasite populations in the phosphorylation of their proteins in vitro. Compared with the slender populations, the non-dividing stumpy fo...