the aim of this article is study of tool plunge depth (tpd) effects on mechanical properties of friction stir welding of aa1100 aluminium alloy to a441 aisi steel. for this purpose the 0.1, 0.2, 0.4, and 0.6 mm tpd selected and other welding parameters kept constant. the results shows that the frictional heat increases and stir zone grain size decreases with increasing tpd at both base metals. ...

Modern organizations face the challenge of communicating their marketing strategies through the Web, besides the traditional means of communication, i.e., newspapers and television. In this context, evaluation of the communicative efficacy of websites becomes a ‘must’ for exploiting the power of such communication channels. In this paper, we propose a systematic method and a tool that supports ...

This research evaluated the efficacy of a psycho-educational Internet self-help tool to educate and support recently (1-6 months) bereaved individuals. The goal of the website was to help users normalize their grief to enhance their adaptive adjustment. A randomized controlled trial evaluated the gains in social cognitive theory constructs and state anxiety. Compared to the control group (N = 3...

Background: Recent studies indicate an increased incidence of pertussis disease in recent years. The aim of this study was to evaluate the efficacy of the acellular vaccine for children (as a replacement of current whole cell vaccine in the Expanded Program on Immunization) and for high-risk adults in Iran through updating current best available evidence.   Methods: We performed a syste...

In this study, we investigated the use of a web-based tool designed to influence levels of student self-efficacy by engaging participants in a time management strategy. On a daily basis for 16 days, a total of 64 undergraduate and graduate students engaged in the web-based time management tool in which students set goals regarding how they planned to spend their time the next day and recorded h...

The efficacy of animated data visualizations in comparison with static data visualizations is still inconclusive. Some researches resulted that the failure to find out the benefits of animations may relate to the way how they are constructed and perceived. In this paper, we present visual analytics (VA) tool which makes use of enhanced animated data visualization methods. The time is an importa...

  Background: Chronic low back pain (CLBP) is an important occupational injury. Musculoskeletal injuries, especially CLBP, are prevalent in the nurses, and can lead to reduced productivity, work absenteeism, and work disability.   The purpose of this study was to determine nurses' knowledge of the risk factors of low back pain (LBP) and their self-efficacy in coping with the risk f...

introduction: enhancing the nutritional condition of teenaged girls can be the most effective and fundamental preventive measure against chronic disease in years ahead. knowing the predictive factors of behaviors is one the most efficient way of preventive programs in societies, especially in the developing countries. this study was conducted to determine the role of self– efficacy in predictin...