The demand for rare earths (RE) has been intensified by their large use, especially in high technology sectors. Supply difficulties have forced RE users to seek alternative sources and invest in the development of recycling technologies and options of reuse for these elements. This article seeks to reveal the trends and ongoing changes in national and global prospects of RE. Additionally, it aims to analyze scientific collaboration networks in the area of industrial solid waste (ISW) and waste electrical and electronic equipment (WEEE) exploitation in Brazil, examining both researchers and institutions with greater representation in the field. For this purpose, social network analysis methods were used to build and analyze co-authorship networks based on scientific publications retrieved from the Web of Science (WoS) database. The results showed that the Brazilian collaboration network of ISW research was extremely fragmented and contained 105 different groups, which were not connected to each other. The institutional network of ISW research was composed of 125 institutions, 75.2% of them from Brazil. The Brazilian collaboration network of research in WEEE was small (37 researchers), but fragmented: researchers were divided into eight different groups that do not connect to each other. The institutional network of research in WEEE was composed by 12 institutions, nine of them from Brazil. Therefore, this article presents a network collaboration model to bring together actors involved in the management of waste electrical and electronic equipment (WEEE), emphasizing the potential for recovery of RE from these wastes, with the purpose of developing products and services.

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http://www.ccsenet.org/journal/index.php/enrr/article/viewFile/64760/34921

Author(s): Tereza Raquel Taulois Campos, Marcus Vinícius de Araújo Fonseca, Bruna de Paula Fonseca e Fonseca, Edison de Oliveira Martins
Organization(s): Nuclear Engineering Institute, Federal University of Rio de Janeiro, Oswaldo Cruz Foundation
Source: Environment and Natural Resources Research
Year: 2016

Coupons are a sales promotion tool frequently used by marketers. While considerable research has been conducted on coupons such as its profitability, design, and redemption rate for increased sales, few attempts have been made to summarize the published literature in the form of a review. This paper presents a comprehensive evaluation of research on coupons over the last four decades by examining the evident patterns via keywords, research themes, coupon types, and countries where the studies are based, authors, journals, and product categories utilizing coupon schemes. This mapping of the literature clarifies the evolution of research on coupons and identifies potential developments related to aspects such as coupon design and framing. More importantly, it contributes to the future research agenda by identifying gaps in extant knowledge and evidence.

http://link.springer.com/article/10.1057/s41272-016-0076-7

Author(s): Neeraj Pandey, Vaibhav Maheshwari
Organization(s): National Institute of Industrial Engineering (NITIE)
Source: Journal of Revenue and Pricing Management
Year: 2016

The purpose of this study is to reveal the extent to which different leadership models in education are studied, including the change in the trends of research on each model over time, the most prominent scholars working on each model, and the countries in which the articles are based. The analysis of the related literature was conducted by first employing a bibliometric analysis of the research and review papers indexed in the Web of Science database between 1980 and 2014. Then, a more in-depth analysis of selected papers was done using the content analysis method. The results showed that there has been increasing interest in leadership models in educational research over time. Distributed leadership, instructional leadership, teacher leadership, and transformational leadership are the most studied leadership models in educational research. It was also found that related research increasingly focuses on the effects of leaders on organizational behaviors/conditions and on student achievement. Accordingly, usage of quantitative methodology has significantly increased during the last decade. Possible reasons for these changes, implications, and recommendations for future research are also discussed.

http://ema.sagepub.com/content/early/2016/09/22/1741143216659296.abstract

Author(s): Sedat Gumus, Mehmet Sukru Bellibas, Murat Esen, Emine Gumus
Organization(s): Necmettin Erbakan Universitesi
Source: Educational Management Administration & Leadership
Year: 2016

An increasing number of papers on statistical process control (SPC) has emerged in the last fifty years, especially in the last fifteen years. This may be attributed to the increased global competitiveness generated by innovation and the continuous improvement of products and processes. In this sense, SPC has a fundamentally important role in quality and production systems. The research in this paper considers the context of technological improvement and innovation of products and processes to increase corporate competitiveness. There are several other statistical technics and tools for assisting continuous improvement and innovation of products and processes but, despite the limitations in their use in the improvement projects, there is growing concern about the use of SPC. A gap between the SPC technics taught in engineering courses and their practical applications to industrial problems is observed in empirical research; thus, it is important to understand what has been done and identify the trends in SPC research. The bibliometric study in this paper is proposed in this direction and uses the Web of Science (WoS) database. Data analysis indicates that there was a growth rate of more than 90% in the number of publications on SPC after 1990. Our results reveal the countries where these publications have come from, the authors with the highest number of papers and their networks. Main sources of publications are also identified; it is observed that the publications of SPC papers are concentrated in some of the international research journals, not necessarily those with the major high-impact factors. Furthermore, the papers are focused on industrial engineering, operations research and management science fields. The most common term found in the papers was cumulative sum control charts, but new topics have emerged and have been researched in the past ten years, such as multivariate methods for process monitoring and nonparametric methods.

http://www.scielo.br/scielo.php?pid=S0104-530X2016005013101&script=sci_arttext&tlng=en

Author(s): Fabiane Letícia Lizarelli, Nayara Cristini Bessi, Pedro Carlos Oprime , Roniberto Morato do Amaral, Subhabrata Chakraborti
Organization(s): Universidade Federal de São Carlos – UFSCar
Source: Gestão & Produção
Year: 2016