introduction: compulsive internet use scale (cius) is a newest and prestigious questionnaire in the diagnosis of internet addiction .the goals of this study was to investigate the reliability and validity (psychometric properties) of persian version of cius in internet users of isfahan's universities. methods: in this descriptive and cross- sectional research  400 isfahan university students we...

We present an optimal single-winner preferential voting system, called the “GT method” because of its interesting use of symmetric two-person zero-sum game theory to determine the winner. Game theory is not used to describe voting as a multi-player game between voters, but rather to define when one voting system is better than another one. The cast ballots determine the payoff matrix, and optim...

background: edinburgh postnatal depression scale (epds) has been used as a reliable screening tool for postpartum depression in many countries. this study aimed to assess the psychometric properties and diagnostic accuracy of the epds in a sample of iranian women. methods: using stratified sampling 262 postpartum women (2 weeks-3 months after delivery) were selected from urban and rural health ...

Let Pn be a pentagonal chain with 2n pentagons in which two edges common can regarded as adding one vertex and to hexagon. Thus, the linear derivation chains QPn represent graph obtained by attaching four-membered rings every of Pn. In this article, Laplacian spectrum consisting eigenvalues symmetric matrices is determined. Next, formulas for invariants that represented spectrum, namely, Kirchh...

The theory of congruences for the partition function p(n) depends heavily on the properties of half-integral weight Hecke operators. The subject has been complicated by the absence of closed formulas for the Hecke images P (z) | T (`), where P (z) is the relevant modular generating function. We obtain such formulas using Euler’s Pentagonal Number Theorem and the denominator formula for the Mons...

ABSTRACT Several works on nonclassical fullerenes with heptagons have mainly considered the case with just one heptagon. In this context the isolated pentagon rule is not satisfied. The study of nonclassical fullerenes is important because some of them are more stable than the corresponding classical isomers with the same number of pentagonal bonds. We present several nonclassical fullerenes wi...