The possibility of extending the tunability Free-Electron Lasers towards short wavelengths has been explored through design devices conceived to enhance mechanisms nonlinear harmonic generation. In this respect, different schemes operation have suggested in past, such as seeding, bi-harmonic undulators, and two-beam self-seeding devices. paper, we discuss how these methods can be merged into a ...

In this paper, an anomaly detection method in cluster-based mobile ad hoc networks with ad hoc on demand distance vector (AODV) routing protocol is proposed. In the method, the required features for describing the normal behavior of AODV are defined via step by step analysis of AODV and independent of any attack. In order to learn the normal behavior of AODV, a fuzzy averaging method is used fo...

abstract background: the aim of this study was to compare the effects of the second- and third-generation oral contraceptives on women’s reproductive sexual function. materials and methods: this randomized, double-blind, placebo-controlled clinical trial was conducted on 82 married women of reproductive age in tehran. samples were randomized into the groups receiving second- and third-generatio...

Introduction: Socioeconomic status (SES) indicators are among the main social determinants of health and illness. Less, however, is known about the role of SES in the epidemiology of polypharmacy in immigrant Latino Americans living in the United States. This research studied the association between three SES indicators, education, income, and employment, and polypharmacy in ol...

this study focuses on the effect of social and cultural determinants on generation gap in tehranian families in 2011. the purpose of this study is to determine effective factors on generation gap in tehranian families, analytical and empirical patterns and be surveyed by related theories and effective factors. the research was prepared by questions including whether there is a relationship betw...

the aim of the present study was to investigate coaches and young athletes' self-efficacy andyoung athletes' enjoyment from physical activity. the study examined the effect of self-efficacy on enjoyment from physical activity in young athletes using structural equation model (sem) and lisrel software. results showed thatcoaches' self-efficacyhad no significant effects onstudents&...

the people’s republic of china is an ever rising world power and islamic republic of iran is one of the most powerful countries in the persian gulf region. the ever increasing world needs for oil and the role of iran and persian gulf in satisfying this need has made these relations more significant. the foreign policy of the fifth generation of leadership in people’s republic of china towards t...