The current state of human performance technology: A citation network analysis of Performance Improvement Quarterly , 1988-2010

Abstract

A bisphenol‐A epoxy resin cured with triethylenetetramine was modified with the addition of a polyamide oligomer and a small amount of montmorillonite. Compositions with different amounts of modifiers were obtained and tested for their impact strength, flexural strength, and resistance to crack propagation. The latter was assessed by measuring the critical stress intensity factor in a three‐point bending mode. Scanning electron microscopy was used to examine the sample fracture surfaces. It was found that the addition of 2% montmorillonite or 5% polyamide resulted in the best improvement of the impact strength and the critical stress intensity factor relative to the unmodified epoxy resin. However, the flexural strength and toughness measured under three‐point bending mode was found to increase to a lesser extent. Hybrid compositions containing specific combinations of both modifier and nanofiller not only exhibited a higher impact strength and resistance to crack propagation but also displayed a synergistic effect in relation to the fracture energy. The results indicate that the improvement in mechanical properties of the epoxy resin was due to the formation of a heterogeneous morphology resulting from phase separation of the polymeric modifier. From the scanning electron microscopy and thermal analysis, it appears that the toughening may arise from chemical reactions that have taken place between the epoxy resin and the polymeric modifier, which was partially solubilized in the resin matrix. © 2008 Wiley Periodicals, Inc. Adv Polym Techn 26:223–231, 2007; Published online in Wiley InterScience (http://www.interscience.wiley.com). DOI 10.1002/adv.20103

Content analysis of the 20 most influential articles inPIQ

“…What are the implications of a content analysis of the 20 most infl uential articles for HPT research practices? Originally, Cho et al (2011) performed a citation network analysis of 647 articles published in PIQ from 1988 to 2010. On the basis of those fi ndings, we selected the 18 most infl uential articles that combined the 10 most frequently cited articles and the 10 articles with the highest centrality, as shown in Table 2.…”

“…Research methods used in the previous reviews include content analysis (Klein, 2002), Dephi (Huglin, Johnsen, & Marker, 2007), web-based survey (Pershing, Lee, & Cheng, 2008), citation analysis (Huglin, 2009), and citation network analysis (Cho et al, 2011). Table 1 summarizes previous reviews in HPT.…”

“…The purpose of this study is to examine key research themes in human performance technology (HPT) through content analysis of the 20 most in uential articles identi ed in Cho, Jo, Park, Kang, and Chen (2011). Three questions guiding this inquiry are: (1) What are the key themes of the 20 most in uential articles in PIQ, (2) What information do the 20 most in uential articles add to an understanding of HPT,and (3) What are the implications of the content analysis for HPT research practices?…”

“…Although Cho et al (2011) informed the landscape of HPT through a citation network analysis of PIQ and identifi ed the 20 most infl uential articles, they did not explicate the qualitative details of the 20 most infl uential articles. e purpose of this article, therefore, was to examine key themes through a content analysis of the 20 most infl uential articles.…”

“…While traditional methods (content analysis, Delphi, and survey) demonstrated researchers' intuitive assessment and refl ections, citation analysis, through analysis of citations of HPT journals, has revealed the most cited articles. Recently, citation frequency and networks based on social network analysis (Borgatti, Mehra, Brass, & Labianca, 2009) have revealed the scholarly infl uence among academic publications (Cho, Jo, Park, Kang, & Chen, 2011).…”