where (Pt)t>0 is an approximation of the identity defined by the dilates of a ‘nice’ kernel (for example (Pt) may be the Poisson or the heat semigroup). Their significance in harmonic analysis, and many important variants and generalizations have been discussed in Stein’s monographs [38], [39], [44], in the survey [45] by Stein and Wainger, and in the historical article [43]. Here we focus on L...

Using atomistic computer simulations we determine the roughness and topographical features of melt-formed (MS) fracture surfaces (FS) oxide glasses. We find that topography MS is described well by frozen capillary wave theory. The FS are significant rougher than depend strongly on glass composition. height-height correlation function for shows an unexpected logarithmic dependence distance, in c...

This study evaluated the effectiveness of different sealants applied to a nanofiller composite resin. Forty specimens of Filtek Z-350 were obtained after inserting the material in a 6x3 mm stainless steel mold followed by light activation for 20 s. The groups were divided (n=10) according to the surface treatment applied: Control group (no surface treatment), Fortify, Fortify Plus and Biscover ...

Deposition of small adhesive particles, called microstickies, onto pulp processing equipment and paper machines causes quality operational problems for recycling mills. The factors that control deposition microstickies surfaces metal parts remain unclear. In this work, aluminum with a range surface roughness were exposed to slurries containing micros-tickies. results showed flat promote the agg...

BACKGROUND Biomechanical phenomenon called "needle grasp" through the winding of connective tissue has been proposed as an action mechanism of acupuncture manipulation. The aim of the present study is to verify whether the needle grasp force affects the pain-relieving activity of acupuncture in the tail-flick latency (TFL) and the rat paw formalin tests. METHODS In order to make different rou...

The historic Penouta mine in northwest Spain is the focus of efforts to extract tantalum from tin mining waste. This paper describes the characterisation of the tantalum mineralogy of waste material from the deposit. Characterisation was realised using quantitative mineralogy and geochemistry. This paper further identifies other phases of interest and investigates the potential for extraction u...

The use of dental implants to treat tooth loss has increased rapidly over recent years. 'Smooth' implants showing high long-term success rates have successively been replaced by implants with rougher surfaces, designed to stimulate rapid osseointegration and promote tissue healing. If exposed in the oral cavity, rougher surfaces may promote bacterial adhesion leading to formation of microbial b...

Flotation is the most important process for concentrating mineral ores. This process may occur in any vessel such as column flotation, which has been used widely during the last decade and the conventional flotation cells. The effect of superficial feed velocity on the copper recovery was investigated using pilot-scale column flotation of "Sarcheshmeh Capper Complex". The results were compa...

Friction originates at the area of real contact which depends on (changing) surface topography. Observing and measuring multi-asperity interfaces is difficult, making it challenging to quantitatively study interplay between frictional force In this paper, we systematically manipulate topography use a fluorescence microscopy-based visualization technique reveal interplay. We demonstrate good agr...

The Cerattepe (Artvin) mine contains volcanogenic massive sulfide (VMS) deposits in northeastern Turkey. This is a kuroko type deposit located Late Cretaceous volcanic, intrusive and sedimentary rocks, has structure with dense alteration stages. In this study, batch flotation tests were carried out to determine the behavior of new sample (mix ore), that was combination two different ores behavi...