The experimental investigations of the tool wear in turning of EN 31 alloy steel at different cutting parameters are reported in this paper. Mathematical model has been developed for flank wear using response surface methodology. This mathematical model correlates independent cutting parameters viz. cutting speed, feed rate and depth of cut with dependent parameters of flank wear. This model is...

in this paper, experimentally derived correlations of heat transfer and pressure drop are used in a pareto based multi-objective optimization (moo) approach to find the best possible combinations of heat transfer and pressure drop of tio2-water nanofluid flow in tubes fitted with multiple twisted tape inserts in different arrangement. in this study there are four independent design variables: t...

PURPOSE The purpose of this study is to evaluate the retention of two-piece computer-aided design (CAD)/computer aided manufacturing (CAM) zirconia abutments after artificial aging under simulated oral conditions using three different types of resin-based luting agents. MATERIAL AND METHODS Twenty-one CAD/CAM-generated zirconia copings (CERCON Compartis, Degudent, Hanau, Germany) were bonded ...

OBJECTIVE To investigate the adequacy of the content and format of the patient information section in package inserts of commonly prescribed drugs at the internal medicine service of a school hospital. METHODS Forty eight package inserts were collected from six pharmacies of the city of Porto Alegre in June 1998. The presence of mandatory notification and other information required by Brazili...

A classificação do sítio Pedra Alexandre como cemitério, insere-o no cerne das discussões sobre as práticas funerárias de grupos caçadores-coletores sul-americanos. Considerado lugar persistente (persistente place) e marco paisagístico (landmark), neste artigo, apresentou-se uma síntese pesquisas arqueológicas desenvolvidas. Como resultados obtidos, elenca-se: novas cronologias definidas, relaç...

Piezoelectric bone surgery, known simply as piezosurgery, is a new technique of osteotomy and osteoplasty, which requires the use of microvibrations of ultrasonic frequency scalpels. The principle of piezosurgery is ultrasonic transduction, obtained by piezoelectric ceramic contraction and expansion. The vibrations thus obtained are amplified and transferred onto the insert of a drill which, wh...

PURPOSE Microgaps at the implant-abutment interface allow for microbial colonization, which can lead to peri-implant tissue inflammation. This study sought to determine the marginal accuracy of three different implant-zirconium oxide (zirconia) abutment configurations and one implant?titanium abutment configuration. MATERIALS AND METHODS Three combinations of implants with custom-made zirconi...