this study proposed a new discharge estimation method using a mean velocity formula derived from chiu’s 2d velocity formula of probabilistic entropy concept and the river bed shear stress of channel. in particular, we could calculate the mean velocity, which is hardly measurable in flooding natural rivers, in consideration of several factors reflecting basic hydraulic characteristics such as r...

Consider the following decision problem: for a given monotone Boolean function f decide, whether f is read-once. For this problem, it is essential how the input function f is represented. On a negative side we have the following results. Elbassioni, Makino and Rauf ([1]) proved that this problem is coNP-complete when f is given by a depth-4 read-2 monotone Boolean formula. Gurvich ([2]) proved ...

following the failure of economic development and growth policies and dissatisfactions resulting from applying these policies, related discussions to life satisfaction was proposed among various experts. in their opinion, different factors can be effectual on life satisfaction. one of the most important factors is social welfare. this study is a social survey and it has used questionnaire for c...

introduction: the parikh’s formula is a calculation method that considers menstrual cycle duration in women who have an unusual interval of menstruation cycle. since the accurate estimation of gestational age affects pregnancy outcomes, the present study aimed to compare the first trimester ultrasound and parikh’s formula in determining the expected date of delivery (edd). materials and methods...

this study aimed to modify the current purchase formula of sugar beet into a formula with different coefficients with respect to sugar percentage of autumn sugar beet. ahvaz sugar factory was selected as an autumn sowing factory in iran and 163 samples were randomly taken at different delivery times in 2007 (28th april to 27th june).  from each truck, one sample was taken and sugar content, wat...

Cytoplasmic incompatibility (CI)-inducing endosymbiotic bacteria, such as Wolbachia and Cardinium, have been well studied through field data and validations on the basis of numerical simulations. However, the analytically derived equilibrium frequency of multiple infections has not yet been determined, although the equilibrium for cases of single infection has been reported. In this study, we c...

female heads of households are responsible for the material and spiritual needs of the families because of a deceased, missing, separated, divorced, addicted, disabled (permanent or temporary), imprisonment, ill or military deployed male head of households. survey research was employed in the study. the target population includes rural women heads of households razan city. following cochran’s f...

We prove an addition formula for Jacobi functions r ~' ~) (~17_~-~ ) analogous to the known addition formula for Jacobi polynomials. We exploit the positivity of the coefficients in the addition formula by giving the following application. We prove that the product of two Jacobi functions of the same argument has a nonnegative Fourier-Jacobi transform. This implies that the convolution structur...

This paper reinforces numerical iterated integration developed by Muhammad–Mori in the following two points: 1) the approximation formula is modified so that it can achieve a better convergence rate in more general cases, and 2) explicit error bound is given in a computable form for the modified formula. The formula works quite efficiently, especially if the integrand is of a product type. Nume...