P. Hreha, A. Radvanská, J. Cárach, D. Lehocká, K. Monková, S. Hloch Faculty of Manufacturing Technologies, with a seat in Prešov, Prešov, Slovak Republic; S. Hloch Intitute of Geonics Academy of Science v.v.i. Ostrava – Poruba, Czech Republic; G. Krolczyk Faculty of Production Engineering and Logistics, Opole University of Technology, Poland; A. Ruggiero Department of Industrial Engineering, Un...

Recent developments in grinding have opened up new avenues for finishingof hard and brittle materials with Nano-surface finish, high tolerance and accuracy.Grinding with super abrasive diamond wheels is an excellent way to produce ultraprecision surface finish. However, super abrasive diamond grits need higher bondingstrength while grinding, which metal-bonded grinding wheels ca...

The drying of grapes is a more complex process compared to the dehydration of other agricultural materials due to the necessity of a pretreatment operation prior to drying. Grape drying to produce raisins is a very slow process, due to the peculiar structure of grape peel, that is covered by a waxy layer. Its removal has been so far carried out by using several chemical pre-treatments. However,...

Particle reinforced metal matrix composites (PRMMCs) are the materials that are extremely difficult to machine using conventional manufacturing method due to high tool wear caused by presence of the hard ceramic reinforcement. This paper presents details of an investigation into the machinability of TriAlumane zirconium (Al3Zr), Zirconia (ZrO2) and Silicon carbide (SiC)particulate reinforcedalu...

In this study, firstly, the YL12 aluminum alloy is used as experimental materials, then in the following experiments it is cut in JJ-I-type water jet machines, and 1,000 group data are gotten by measurement. In each group data, pressure, material thickness, surface roughness, abrasive flow and traversing speed are included. Next, BP artificial neural network is established. In this network, the...

BACKGROUND The aim of the study was to test the efficacy of a novel low-abrasive air polishing powder in subgingival plaque removal at interdental sites during periodontal maintenance therapy (PMT). METHODS Using a split mouth design, subgingival plaque was removed in 23 PMT patients using a low abrasive powder using a standard air polishing unit (test) or curets (positive control). Before an...

Prevention of intraventricular haemorrhage in preterm infants in Britain and Ireland EDITOR,-Intraventricular or periventricular haemorrhage is a potential cause of morbidity and mortality in preterm infants. Many potential treatments have been studied but three in particular have influenced practice in the British Isles: vitamin El; ethamsylate2; and fresh frozen plasma.3 Meta-analysis has sho...

This paper develops analytically a statistical model for predicting the material removal in mechanical polishing of material surfaces (MS). The model was based on the statistical theory and the abrasive–MS contact mechanisms. The pad-MS and pad-abrasive-MS interactions in polishing were characterised by contact mechanics. Two types of active abrasive particles in the polishing system were consi...