For many years the concept of using hexagonal pixels for image capture has been investigated, and several advantages of such an approach have been highlighted. Recently there has been a renewed interest in the use of hexagonal images: biologically inspired approaches, representation of architectures for such images and general hexagonal image processing. We present multiscale hexagonal gradient...

We describe a bijection between hexagonal lattice animals and a special type of square lattice animals. Using this bijection we adopt Maple packages that automatically generates generating functions (and series expansions) for fixed square lattice lattice animals to that of fixed hexagonal animals on the two-dimensional hexagonal lattice confined to a strip 0 ≤ y ≤ k, for arbitrary k. In [Z1], ...

The first geometric-arithmetic index was introduced in the chemical theory as the summation of 2 du dv /(du  dv ) overall edges of the graph, where du stand for the degree of the vertex u. In this paper we give the expressions for computing the first geometric-arithmetic index of hexagonal systems and phenylenes and present new method for describing hexagonal system by corresponding a simple g...

Key British scientists were invited to a 'power' breakfast last month to discuss with no less than five ministers their views on how science policy can be developed. And in the chancellor's later annual budget statement, the government underlined its wish to see investment in science as a key to future prosperity. But future money will not all be coming from the government: there are growing ef...

Lean Production is one of the current issues in logistics (Womack, 2004). Clocked production and transport effect an adjustment of the individual process steps. Today only large companies are able to raise enough transport volume for an individual transport solution and so assure the resulting advantages of decreasing storage costs and capital lockup. An individually clocked transport in small ...

Gas separation using porous solids have attracted great attention due to their energetic applications. There is an enormous economic and environmental interest in the development of improved technologies for relevant processes, such as H2 production, CO2 separation or O2 and N2 purification from air. New materials are needed for achieving major improvements. Crystalline materials, displaying un...

We have developed a novel method for fabricating an embryonic stem cell divider (ESCD) constructed from a poly(dimethylsiloxane) (PDMS) replica with a square or hexagonal pattern, and have proposed a new dissociation method for human embryonic stem cells (ESCs). An aspect ratio of the device as high as 2 was perfectly replicated in the cutting line. Using the ESCD, human ESC colonies can be eas...

The recently discovered mesoporous aluminosilicate MCM-41 consists of hexagonal arrays of nanometer-sized cylindrical pores. It is shown that this material can be synthesized by cooperative condensation of silicate and cylindrical cationic micelles. Careful control of the surfactant-water content and the rate of condensation of silica at high alkalinity resulted in hollow tubules 0.3 to 3 micro...

Plasmonics and photonic crystals are two complementary approaches to tailor single-emitter fluorescence, using strong local field enhancements near metals on one hand and spatially extended photonic band structure effects on the other hand. Here, we explore the emergence of spontaneous emission control by finite-sized hexagonal arrays of nanoapertures milled in gold film. We demonstrate that al...