The rapid growth in urban population is seen to create a need for the development of more urban infrastructures. In order to meet this need, natural surfaces such as vegetation are been replaced with non-vegetated surfaces such as asphalt and bricks which has the ability to absorb heat and release it later. This change in land cover is seen to increase the land surface temperature. Previous stu...

AIM The aim of the present study was to assess the change in physical properties (surface roughness, surface hardness and phase transformation) after surface grinding of zirconia by using three commercially available abrasives. MATERIALS AND METHODS Thirty sintered zirconia specimens were prepared and divided into three groups namely Group M (grinded using Mani Dia diamond bur standard grit),...

This study concerned the effect of heat treatment during setting on the physical properties of four resin-based provisional restorative materials: Duralay (polymethyl methacrylate), Trim II (polyethyl methacrylate), Luxatemp (bis-acrylic composite), and Protemp 4 (bis-acrylic composite). Specimens were prepared at 23, 37, or 60 °C for evaluation of flexural strength, surface roughness, color ch...

The Divergence Theorem as usually stated cannot be applied across a change of signature unless it is re-expressed to allow for a finite source term on the signature change surface. Consequently all conservation laws must also be ‘modified’, and therefore insistence on conservation of matter across such a surface cannot be physically justified. The Darmois junction conditions normally ensure con...

introduction: benefits of regular physical activity are well documented in all age groups; nevertheless, a sedentary lifestyle among adolescents, adults and elderly people in prevalent in nearly all parts of the world. a decline step in activity levels occurs in adolescence. the present study is designed to test: 1) determining the distribution of adolescents on every single one of the stages o...

The properties of thermal radiation exchange between hot and cold objects can be strongly modified if they interact in the near field where electromagnetic coupling occurs across gaps narrower than the dominant wavelength of thermal radiation. Using a rigorous fluctuational electrodynamics approach, we predict that ultra-thin films of plasmonic materials can be used to dramatically enhance near...

the purpose of this research was to study participative management and resistance to change dimensions as well as to survey their relationship in physical education organization and physical education department of ministry of education. for this purpose, 126 experts of physical education organization and 38 experts of physical education department of ministry of education were selected. data w...