objectives: the aim of this study was to evaluate the effect of six herbal teas on the color stability of two types of nanohybrid and one microhybrid resin composite.  materials and methods: 70 disc-shaped specimens, 210 in total (7*2mm), were fabricated from each of the following materials in metal mould : tetric n ceram, grandio, gradia direct anterior. specimens were stored in distilled wate...

We recently demonstrated Solvent Immersion Imprint Lithography (SIIL), a rapid benchtop microsystem prototyping technique, including polymer functionalization, imprinting and bonding. Here, we focus on the realization of planar polymer sensors using SIIL through simple solvent immersion without imprinting. We describe SIIL's impregnation characteristics, including an inherent mechanism that not...

For an oriented isometric immersion f : M → S the spherical Gauss map is the Legendrian immersion of its unit normal bundle UM⊥ into the unit sphere subbundle of TS, and the geodesic Gauss map γ projects this into the manifold of oriented geodesics in S (the Grassmannian of oriented 2-planes in R), giving a Lagrangian immersion of UM⊥ into a Kähler-Einstein manifold. We give expressions for the...

The surface morphology and crystal structure change of dental zirconia after hydrofluoric acid (HF) etching were evaluated. Four groups of sintered zirconia specimens were 1) control group, 2) immersion in 9.5%HF at 25°C for 1, 2, 3, or 24 h, 3) immersion in 9.5%HF at 80°C for 1, 3, 5, or 30 min and 4) immersion in 48%HF at 25°C for 30 or 60 min. The specimens were evaluated under SEM and XRD. ...

A commonly encountered argument for using sound in games is that sound increases the sense of immersion of a game. Immersion refers to an experience of being drawn into the game world, a process is centrally dependent on the players’ simultaneous removal from everyday life also called disassociation. The immersive power of sound has been linked to its capacity to disassociate: to transport the ...

Aquatic immersion has been reported to produce a significant number of physiological changes in blood pressure, heart rate variability (HRV), autonomic nervous system (ANS), and core temperature in young healthy subjects. The purpose of this study was to examine the impact of water immersion in younger and older populations, determining whether there are age related differences for ANS regulati...

People who play videogames often report the sense of immersion in the game with a particular feature of immersion being a loss of the sense of time passing. In this paper, we investigate if altering the degree of immersion in a videogame really does influence people’s psychological perception of time passing. We use music to make a maze game more immersive and we measure time perception using t...