Aim The aim of the present work was to compare the elastic properties and internal structure of 4 different CAD/CAM chairside materials, by the method of Scanning Impulse Acoustic Microscopy (SIAM). Methods Four chairside CAD/CAM materials with different structures from hybrid ceramic (VITA Enamic, VITA Zahnfabrik), feldspatic ceramic (VITABlocs Mark II, VITA Zahnfabrik), leucite glass-cerami...

The need for energy conservation has become increasingly important over the last several decades. Several innovations have driven the growth of energy efficient glazing use in residential, commercial and automotive applications. A number of government-private joint efforts are focused on achieving even greater use of energy efficient windows [1]. Even with the high penetration of energy efficie...

In this work, the potential of magnetron sputtered magnesium uoride (MgF2) and MgF2 containing composite coatings for coloured solar collector glazing is investigated. Coloured thinlm interference coatings on the reverse side of the collector cover glass give solar collectors an aesthetic appearance, which facilitates their integration into the building’s envelope. Hereby, integration means tha...

PURPOSE This study was conducted to evaluate clinical validity of a zirconia full-coverage crown by comparing zirconia's wear capacity over antagonistic teeth with that of feldspathic dental porcelain. MATERIALS AND METHODS THE SUBJECT GROUPS WERE DIVIDED INTO THREE GROUPS: the polished feldspathic dental porcelain group (Group 1), the polished zirconia group (Group 2), and the polished zirco...

This paper discusses an improved approach to the Trombe wall: insulated panel is installed on inner side, and vents are at top bottom connect outer air layer with interior. Direct current (DC) fans in upper for stable control of circulation. The study first analyzed thermal performance this composite wall, which heat load was 27.3% less compared classic wall 32.1% case without wall. However, it...

A thorough examination has been performed of the thermally induced stresses on a window in an enclosure-fire environment. Analytical and numerical methods establish the importance of bridling stress (due to axial elongation) and flexing stress (due to normal deformation). Most previous studies omitted the consideration of flexing stresses. Maximum stresses, being the sum of bridling and flexing...