One of the disadvantages of conventional milling tools is to produce a large amount of heat in cutting zone and so making the tool warmer. As a result, the tool would be worn and its life time would be reduced. Therefore, in long time machining, it is essential to change inserts and tools, continiously. A milling tool with self rotary cutting inserts was designed and manufactured that enables i...

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...

Tool wear has great impacts on tool life and cutting parameter selection in the machining process. As ceramic inserts are widely employed efficient machining, it is of significance to predict accurately tools. Crater one most significant modes when turning difficult-to-cut materials at high speeds. The purpose this research demonstrate forming influence mechanisms crater Ti6Al4V with while cons...

objective: microleakage in the gingival floor of class ii composite restorations can compromise the marginal adaptation of the filling material to the cavity edges. the aim of this study was to evaluate the effect of light conducting cylindrical inserts in decreasing the microleakage of the gingival floor in cavities 1mm below the cej. materials and methods: eighty maxillary first molars were r...

This study presented the effect of pressure on density, porosity and flexural strength when cold isostatic press (CIP) was applied to compact ceramic powders in form insert cutting tools. Specific composition alumina (Al2O3) wt.90%, yittria stabilized zirconia (YSZ) wt.10%, chromium oxide(Cr2O3) wt.0.6% polyethylene glycol (PEG) were ball milled hand pressed green body inserts. These undergone ...

the objective of this investigation was the development of chitosan/xanthan polyelectrolyte complex based mucoadhesive nasal insert of promethazine hydrochloride a drug used in the treatment of motion sickness. a 32 factorial design was applied for preparing chitosan/xanthan polyelectrolyte complex and to study the effect of independent variables i.e. concentration of xanthan [x1] and concentra...

Intranasal route, ensuring suitable bioavailability of medicines under circumvention of the gastrointestinal degradation and hepatic first-pass elimination, has been a popular choice for drug delivery. Among nasal dosage forms, mucoadhesive solid inserts have been shown to resist mucociliary clearance and provide a prolonged nasal residence time. Hence, the purpose of this study was the prepara...

background : in anterior endodontically treated teeth a better esthetic can be achieved by using all-ceramic post -core restorations instead of metal post systems. maximum retention and fracture resistance of the post are the criteria upon which selection of a post system is based. the aim of this study was to evaluate the fracture resistance and retention of two all-ceramic post and core syste...

INTRODUCTION Tobacco companies have a long tradition of including promotional material within cigarette packs, such as cigarette cards and coupons. Only in Canada are they required, by the government, to include educational material within cigarette packs, in the form of inserts highlighting the benefits of quitting or providing tips on how to do so. METHODS Twenty focus groups were conducted...

SiAlON is one of the problematic and least previously studied but prospective cutting ceramics suitable for most responsible machining tasks, such as sophisticated shapes aircraft gas turbine engine parts made chrome–nickel alloys (Inconel 718 type) with increased mechanical thermal loads (semi-finishing). Industrially produced inserts are replete numerous defects (stress concentrators). When e...