introduction:  the  advent  of  dual-modality  pet/ct  scanners  has  revolutionized  clinical  oncology  by  improving lesion localization and facilitating treatment planning for radiotherapy. in addition, the use of  ct images for ct-based attenuation correction (ctac) decreases the overall scanning time and creates  a noise-free  attenuation  map  (6map).  ctac  methods  include  scaling,  s...

We present a spectral analysis of continuous scaling algorithm for matrix and operator scaling. The main result is that if the input or has gap, then natural gradient flow linear convergence. This implies simple descent also convergence under same assumption. gap condition closely related to notion quantum expander studied in information theory. provides bounds on some important quantities prob...

Background and objectives: The association of oral micro-organisms with infectious diseases such as bacterial endocarditis is a concern in dentistry. Bacterial endocarditis is a serious disease with a mortality rate of 40%. The present study was conducted to investigate the effect of using chlorhexidine mouthwash on concentrations of some groups of bacteria in gingival sulcus, which is the main...

∝ 〈n|A〉2α with 1/2 ≥ α ≥ 1 when a parameter A (usually the system size) is varied. A can be the strength of the node, the capitalization of the firm or the area of the habitat. On the other hand, quantities often obey gap scaling meaning that their density function depends on, say, the system size A as P (n|A) = nF (n/A). This note describes that these two notions cannot coexist except when α =...

breeding programs strategies depends on genetical mechanism of selection traits. in the present research, generation mean analysis with joint scaling test was performed to determine the gene action. f1, f2 and f3 generations, derived from roushan and kavir cross along with their parents were sown in a partial lattice design with two replications under stress condition at the research field of s...