A finite or infinite matrix A with rational entries is called partition regular if whenever the natural numbers are finitely coloured there is a monochromatic vector x with Ax = 0. Many of the classical theorems of Ramsey Theory may naturally be interpreted as assertions that particular matrices are partition regular. In the finite case, Rado proved that a matrix is partition regular if and onl...

The vacuum hot pressing (VHP) of silicon carbide monofilaments coated with nanocrystalline Ti–6Al–4V has been studied. During consolidation, very high densification rates were observed, even at temperatures and pressures well below those normally used for processing conventional Ti–6Al–4V. From the cross-sections of partially consolidated specimens, the evolution of coated fiber–fiber contacts ...

This study investigates the lateral impact responses of reinforced concrete (RC) and composite columns through dynamic nonlinear analysis using LS-DYNA. The simulation results were first validated against experimental performed earlier on four different cross sections. finite element show that LS-DYNA can predict well be used for further parametric analysis. overall resistance new is significan...

In recent years, ground columns, such as vibro-concrete columns and geosynthetic-reinforced stone columns, have been increasingly used to support superstructures and embankments when they are constructed on soft foundations. Several new column technologies have emerged, including different shapes of concrete columns and composite columns. The column technologies have also been combined with oth...

BACKGROUND The ligamentum longitudinale anterius is a broad and strong band of fibrous tissue that runs along the anterior surfaces of the bodies of the vertebrae. AIM The study was undertaken to evaluate the incidence of ossified ligamentum longitudinale anterius in adult dry human vertebra. MATERIALS AND METHODS This study was carried out on 95 sets of dry human vertebral columns irrespec...

Soft clay deposits cause many problems due to low bearing capacity and high deformation. This paper presents the results of laboratory model tests for studying improvement soft clay-bearing using two kinds soil columns, first is slag-cement dust columns second bentonite column. Three from SCC (slag-cement columns) encased by Woven Geotextile are installed beneath a steel plate representing foot...

In this study, FRP jackets were investigated for their confinement effectiveness on rectangular RC columns. Thirteen reduced-scale short columns were tested to failure in axial compression. Variables investigated include: the type of fibers (AFRP, CFRP or GFRP), the thickness of the jacket, the aspect ratio of the rectangular cross section and the radii of the corners. For square columns, GFRP ...