Background and aims: <span style="color: #221e1f; font-family: Optima ...

The contribution deals with the Matlab application used for television colorimetry and color spaces analysis. The mathematical description of known color spaces (RGB, XYZ, YUV, YIQ, YCbCr, HSV, CMY, CMYK) is introduced including their reciprocal transformation. The application allows selection of input color image, direct and backward transformation into the selected space including MKO, CIE an...

nano-srtio3 and tio2 powders were synthesized using sol-gel method. the srtio3 and tio2 powders were characterized using xrd, sem, and spectrophotometry. xrd analysis indicated that the tio2 powder was uniform anatase crystals of 9.9 nm and the srtio3 powders was cubic nano-crystal of 16.2nm. photocatalytic experiments revealed that methyl orange in water can be decomposed on the two powders un...

there is lack of consensus among endodontic specialists about the necessity of tug back. in this regard, we designed a study in which 44 single rooted teeth with closed apex were selected and filed up to file #50. the teeth were obturated with lateral condensation method while in half of them there was not any tug back and in the other half tug back was achieved. apical leakage was assessed by ...

Digital media are rapidly replacing their analog counterparts. This development is accompanied by (i) the increasing amount of images present on the Internet, (ii) the availability of the Internet for an increasing number of people, (iii) a decline in digital storage costs, and (iv) the developments in personal digital video/photo cam-era's [1, 2, 3]. In anticipation of these developments, the ...