The interaction of a high-intensity ultrashort laser pulse with few microns-thick hydrocarbon target is known to accelerate protons/ions multi-MeV, on the rear side target, via mechanism normal sheath acceleration. Micro-structuring front one promising approaches enhance cut-off energy as well reduce divergence accelerated protons/ions. In this paper, normally incident intense targets having si...

To improve the aerodynamic performance and reduce noise of multi-blade centrifugal fans used in air conditioners, a bionic groove structure was introduced into blade tip design, inspired by drag reduction characteristics mantis shrimp. In this paper, numerical method to investigate effects on fan. Firstly, basic design parameters, such as width, depth, center distance, number, were selected def...

We present a GPU-accelerated algorithm to render surface detail features like scratches and grooves in real time. Our method efficiently models these features using a continuous representation that is stored in two textures. The first texture plays the role of a hash and provides pointers to the second texture containing the scratches paths, profiles and material information. This data is evalu...

This paper presents a hydrodynamic lubrication model to investigate the static and dynamic characteristics of micro-grooved bearings considering journal misalignment. An averaged Reynolds equation with mass conservation is derived numerical procedure solved by finite difference method. The influences eccentricity ratio, misalignment micro-groove parameters on performances aligned/misaligned are...

The paper investigates how the surface relief of an implant affects cell behavior. Currently, most manufacturers claim key impact biocompatibility factor to be micro-roughness. We suppose that interaction between cells and implants also depends on such peculiarities as continuous or discontinuous topography, subcellular distance peaks presence porous oxide layer. have developed laser processing...

The reflectance of corrugated surfaces with a fractal distribution of grooves is investigated. Triadic and polyadic Cantor fractal distributions are considered, and the reflected intensity is compared with that of the corresponding periodic structure. The self-similarity property of the response is analyzed when varying the depth of the grooves and the lacunarity parameter. The results confirm ...

We demonstrate propagation of terahertz waves confined to a semiconductor surface that is periodically corrugated with V-shaped grooves. A one-dimensional array of V-grooves is fabricated on a highly-doped silicon surface, using anisotropic wet-etching of crystalline silicon, thereby forming a plasmonic waveguide. Terahertz time domain spectroscopy is used to characterize the propagation of wav...

A musical groove is most typically created by a small group of musicians working together, each contributing parts to the whole. Characterizing the knowledge behind such interactive ventures has proved to be challenging. This article attempts to characterize the knowledge basic to grooves first by concentrating on ‘the groove’ as it is practised in soul, rhythm and blues, jazz fusion and variou...