all analytical methods are generally based on the measurement of a parameter or parameters which are somehow related to the concentration of the species.an ideal analytical method is one in which the concentration of a species can be measured to a high degree precision and accuracy and with a high sensitivity. unfortunately finding such a method is very difficult or sometimes even impossible.in...

insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...

the extent to which written corrective feedback on linguistic errors can play a role in helping l2 writers improve the accuracy of their writing continues to be an issue of interest to researchers and teachers since truscott (1996) mounted a case for its abolition. while there is growing empirical evidence that written corrective feedback can successfully target some types of linguistic error (...

in chapter 1, charactrizations of fragmentability, which are obtained by namioka (37), ribarska (45) and kenderov-moors (32), are given. also the connection between fragmentability and its variants and other topics in banach spaces such as analytic space, the radone-nikodym property, differentiability of convex functions, kadec renorming are discussed. in chapter 2, we use game characterization...

nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...

Introduction: Nowadays, readiness for self-directedness and self-efficacy is considered as a motivating factor in student learning. The aim of this study was to evaluate the effectiveness of reverse-class teaching on self-efficacy and self-directed learning of students at Payam-e-Noor Delfan University in English. Methods: The semi-experimental method, in which 30 students of Punjab-e-Noor Delf...

Introduction: The need for self-learning and self-motivation in medical students is a necessity in today’s knowledge-based world. This study aimed to investigate the relationship between Self-directed learning and school motivation in medical students of Isfahan University of Medical Sciences. Methods: In this descriptive-correlational study 300 Medical students were selected through the simpl...