The Raychaudhuri equation is derived by assuming geometric flow in space–time M of n+1 dimensions. turns into a harmonic oscillator form under suitable transformations. Thereby, relation between geometrical entropy and mean geodesic deviation established. This has connection to chaos theory where the trajectories diverge exponentially. We discuss its application cosmology black holes. Thus, we ...

Depth-sensing indentation equipment is widely used for evaluation of the hardness and Young’s modulus of materials. The depth resolution of this technique allows the use of ultra-low loads. However, aspects related to the determination of the contact area under indentation should be cautiously considered when using this equipment. These are related to the geometrical imperfections of the tip, t...

in this study, geometrical, gravimetrical and frictional properties of four common varieties of iranian canola seeds (namely: slm, hyola, okapi, orient), containing the mean moisture value of 6.5% (w.b.) were investigated. geometrical and gravimetrical properties included length, diameter, geometric mean diameter, sphericity, thousand seed mass, volume, true density, bulk density and porosity. ...

The buckling of rate dependent structures is not a topic often discussed in the literature. Methods to predict such exist, but only few experimental works have been published, and even less when considering thick shell structures. In this work we are interested elasto-visco-plastic hemi-egg shells. We follow modelling/experimental approach analyse problem. Buckling experiments at room temperatu...

Abstract Introduction According to previous studies, pore size and geometry are crucial factors assure good clinical results for surgical meshes [refs]. Although commercial commonly knitted, 3D printing has recently been used provide additional properties them In general, the mechanical of printed worse, but geometrical control is better than in knitted ones. this study, a comparison effective ...

First-line chemotherapy for metastatic breast cancer has been the focus of ongoing controversy, a condition that partially reflects the imperfections of available therapy. It also partially reflects not only the imperfections in our ability to monitor response, but also the disagreements among clinicians over the goals of therapy. Each physician maintains a hierarchy of goals for the treatment ...