Gold Route Open Access Journals in Engineering and Technology: Analysis of Research Impact and Implications for Scholarly Communication Title Abstract Introduction Literature Review Methods Results Discussion Conclusion References Appendix 1 Appendix 2 Gold Route Open Access Journals in Engineering and Technology: Analysis of Research Impact and Implications for Scholarly Communication Ifeanyi J. Ezema, Ph.D Research Fellow Department of Information Science University of South Africa Nnamdi Azikiwe Library University of Nigeria Nsukka ifeanyi.ezema@unn.edu.ng Abstract This study examines the research impact of gold open access (OA) journals in engineering and technology. A total of 37 gold route journals that request article processing charges (APC) and 66 other OA journals without APC (i.e., platinum OA) in the field were found in the Directory of Open Access Journals and used for the study. The publishers, APC charges, and the year each journal was added to DOAJ were identified and included in this study. An informetric approach was used to extract research impact indicators (citations, paper productivity, cite/paper, cite/journal, and h-index) of journals. Findings revealed that the publishers of the APC journals were dominated by commercial publishing companies, producing over 60% of the journals. Article processing charges ranged from $7.60 to $3,471.50, with an average of $727.00. Gold route open access (APC) journals performed better than open access non-APC OA journals, since they produced 51.2% of the papers, 71.8% of the total citations, and 65.1% of the total h-index. There was a weak positive correlation between the APC amount of the gold route journals and their research impact. Introduction The past one and a half decades has witnessed a revolution in scholarly communication with the emergence of open access publishing. Librarians had earlier drawn the attention of the global scientific community to dwindling library budgets and the skyrocketing cost of research literature, leading to what was generally regarded as the serials crisis (Guédon 2004; Beall 2013). Journal publishers appeared to be more interested in the economics of scholarly publishing with regard to high profit margin than providing wider access to research literature. With internet powered publishing opportunities, there was an increasing interest in resolving the challenges of the serials crisis. This led to the meeting of the Open Society Institute in 2001, which gave birth to the Budapest Open Access Initiative (BOAI) (see http://www.budapestopenaccessinitiative.org/read). This was described as the “first internationally focused formal statement to articulate a comment to open access” (Peekkhaus & Proferes 2015). BOAI provided different open access models, namely, gold route, which often requires payment of article processing charges, and green route, which involves self-archiving in research or institutional/research repositories (Sanchez-Tarrago & Fernandez-Molina 2009; Peekkhaus & Proferes 2015). The global estimate of open access journals is about 28,000 in all fields, publishing about 2.5 million articles annually with about 20% of the journals using the gold route model (Harnad 2015). Open access publication models, namely, gold, green, and hybrid (publication of gold open access and subscribed articles within the same journal), provide different publication options for scholars (Antelman 2004; Craig et al. 2007; Turk 2008; Tenopir et al. 2017). While the gold and hybrid routes allow the authors to pay article processing charges (APC) as a way of bearing the cost of access to the general public, the green route allows the authors to self-archive their publications in research or institutional repositories or use social media outlets, such as researchgate.net and academic.edu, to share content to the wider scientific community. But, Tenopir et al. (2017) raised concern about the cost of maintaining the institutional repositories and other related challenges in green route open access publishing. There is also a set of established society journals with stable subscription funds, which provide free access to their publications directly or after a period of six months to one year (Laakso et al. 2011). Many other toll-access journals, including top journals in different fields, allow self-archiving of their publications using the green OA. Naturally, open access is believed to enhance wider access and reading of research papers (Laakso et al. 2016) and by extension increase citations and impact of the papers. Harnad et al. (2004) have described citation impact as the “degree to which its findings (research publications) are read, used, applied, built upon, and cited by users to further research and applications.” That is why many publishers are increasingly adopting OA. Similarly, many journals that were originally subscription based have begun to adopt hybrid publication model as a result of pressure from stakeholders, monetary subsidies, and other related issues (Laakso et al. 2016). About 2,400 subscription based journals moved to OA in 2011, and this represents over one third of the journals found in the Directory of Open Access Journals (DOAJ) (Laakso & Bjork 2012). Recent developments indicate that many publishers are increasingly flipping their journals by adding OA options to their publications. For instance Laakso et al. (2016) posited that Hindawi flipped all its journals to open access to avoid competition arising from major publishers. Often APC is paid by funding bodies who have commissioned the research. Otherwise, authors must pay, if they desire free access and wider visibility of their papers. Usually, the possible considerations for authors’ choice of gold route open access include but are not limited to cost to the authors, mandate from the employer or funding body, visibility of the article, and the open access policy of the journal (Bjork 2012). The campaign for open access publishing resulted in many existing journals transitioning to gold route OA (Guédon 2004; Laakso et al. 2016), while others opted for hybrid publication outlets, so as to join the new publication platform that BioMedical Central and Public Library of Science (PLoS) pioneered in 2002. Other journals adopted hybrid publication as a form of gradual transition to the mainline gold-route publishing. Studies indicate that over the years the number of hybrid open access journals have increased tremendously (Laakso et al. 2011; Shamash 2016), but it has not translated to a significant number of articles published using the gold route platform (Bird 2010; Bjork 2012). Many have, however, accused the gold-route model as being costly, risky, and inefficient, and, therefore, authors must be cautious of publishing through the gold route (Guédon 2004; Bjork 2012; Beall 2013). Although there have been author page charges that helped fund some society journals’ publishing over the years, the major concern with APC is its extremely high cost, which many authors find difficult to pay. According to Bjork (2012), the cost of publishing in some of the journals is as much as $3,000, and, therefore, only 1 to 2% of eligible authors can publish articles using this model. This is a source of concern to authors and research funders, as observation from DOAJ shows that many journals hosted in it request article processing charges. DOAJ (see https://doaj.org/) was launched in 2002 during the First Nordic Conference on Scholarly Communication (Stenson 2011). Since then, DOAJ hosts a number of open access journals from many countries all over the world under the Creative Commons Attribution license (https://creativecommons.org/licenses/by/2.0/), which permits sharing and adapting content for any purpose, even for commercial uses. The last two decades witnessed an increase in publication of open-access journals funded through article processing charges from authors (Fox & Hanlon 2015) or through funding from agencies and organizations. This has provided free access to research literature and created wider visibility and readership to authors. As of November 10, 2016, when the data for this research was extracted, there were 9,250 journals and 6,450 searchable journals at article levels with 2,333,303 articles from 128 countries in DOAJ. This showed a remarkable increase from 1,825 journals as reported by Solomon and Bjork (2012a). There are 1,767 journals with APC and 3,685 non-APC journals in DOAJ at the time of this study. The focus of this study is on engineering and technology, and these fields were considered because of the critical role they play in the overall technological development of any nation and even globally. History has also shown the application of science and technology drives sustainable development (Mashi et al. 2014). Hence, countries that have attained a high level of technological development have better human development indicators (UNDP 2018). In recognition of this the G7 Academies Statement (2017) urged the G7 countries to invest more in science and technology because of their capacity to drive sustainable socio-economic development. They are also fields that require current information, such as that found in the journal literature. Consequently, it is very important to investigate issues related to scholarly communication in the discipline. Since there are several open access publication routes for researchers in the discipline, it should be of interest to interrogate economics of these routes in relation to their scholarly impact. The concern is how the demand of APC affects researchers who may not have enough funds to pay as a result of low income and very slim opportunities to attract research grants. Harnad (2015) has also expressed the challenges of institutions that pay for APC and at the same time subscribe to toll access journals to meet the needs of the users. Authors such as Wray (2016) and Beall (2013) are, therefore, concerned about the value they get from APC journals compared to non-APC open access journals. What other additional advantages accrue to the author to justify such payment? Purpose of the study The purpose of this study is to examine the research impact of gold route APC OA journals in relation to the article processing charges the journals request. Specifically, the study intends to Identify APC engineering and technology journals and their charges Identify publishers of APC journals in engineering and technology Determine and compare the productivity and impact of APC and non-APC journals Determine the relationship between APCs and research impact Examine the trends in the growth of APC journals in Engineering and Technology Literature Review Though adoption of open access publishing has increasingly grown over time, earlier concern has been that OA often focused on articles rather than journals, since the papers are published independent of the journals (Guédon 2004). With self-archiving, the article becomes pre-eminent, while the journal only serves as a brand that provides information on papers that were peer-reviewed and those that were not. Though, there are variations in the two publication routes, Guédon (2004) remarked that they are complementary to each other rather than being in competition. However, the gold route model publishing presents to the publishers an attractive offer capable of increasing profit margin in academic publishing. Guédon (2008) has alluded to the economics of scholarly publishing when he remarked that some of the established publishers have created a form of elite club which dominates scholarly publishing, making it extremely difficult to admit neophytes. It is even becoming more monopolistic when university ranking bodies drive their ranking indicators from Web of Science and Scopus, which are dominated by journal portfolios from established publishers, such as Emerald, Elsevier, Springer, and Taylor & Francis, among others (Guédon 2008; Solomon & Bjork 2012b). With this development, it is imperative to understand that very few scientists can or desire to publish in some of these journals using the gold-route option. This is evident from the study of Tenopir et al. (2017), which reported that respondents surveyed were willing to pay APCs not exceeding $100, which is far lower than what many of the gold route journals charge. Shamash (2016) reported that, for the past two years, the average APC has increased by 6%, which is far above the cost of inflation in many countries. The concern here is the fear of established publishers hijacking the gold route publication model for the purpose of maximizing profit. Consequently, some studies have attempted to investigate adoption of APC by journals and their publishers. A study by Walters and Linvill (2011) examined 663 journals hosted in DOAJ in six fields of biology, computer science, economics, history, medicine, and psychology, and found that 29% of journals that charged APC produced 50% of the articles produced. The average APC was $1,109 with a median of $1,300. McVeigh and Pringle (2005) reported that 27% of the 174 medical journals in the Web of Science were open access and another 14% were hybrid journals. A comprehensive Study of Open Access Publishing (SOAP) conducted by Dallmeier et al. (2010) collected data on 2,823 active English-language journals hosted in DOAJ and identified 14 large publishers with 80% of journals requesting APC. Another study by Solomon and Bjork (2012b) found that the major sources of funding for APC publications above $1,000 were through research grants and institutional affiliations. There are also variations in the response of authors across disciplines and geographical areas, as authors from high-income countries with research funding respond more positively to APC than those from low-income countries. Given the high publication charges of some journals, authors are often careful in their choice of journals when submitting their papers. Swan and Brown (1999 and 2004) found that factors that authors consider while choosing journals for their paper submission were readership (wider reach to researchers within and outside the discipline) and quality of journals, while Coupé (2004) remarked that authors equally consider the possibility of rejection of the papers. A related study by Schroter et al. (2006) identified research impact, reputation, readership, speed of publication, and quality of peer review as major considerations of authors in the choice of journals in submitting their papers. All these fall under the framework of Bjork and Holmström’s (2006) 29 factors aggregated into four groups: infrastructure, readership, prestige, and performance. Because of the article processing charges, there appears to be slow growth in the gold route OA publishing as reported in the study of Dallmeier et al. (2010), which revealed that Springer’s gold route option had grown from 0% in 2004 to 1% in 2009; while the study of Bjork (2012) revealed that OA articles from journal portfolios from American Physical Society from 2007 to 2010 constituted only 0.3%, and Elsevier recorded less than 1% of sponsored articles in their gold route model, and this accounted for less than 0.1% of its total revenue in 2012. Bjork therefore concludes that the hybrid experiment has failed to add a significant number of OA articles through the gold route. It is, therefore, contentious whether gold route OA has any relative value in scholarly communication. Wray (2016) has argued that there was no benefit in gold route OA considering the huge charges from publishers. Although several studies found citation advantage to open-access publishing (Antelman 2004; Metcalfe 2006; Craig et al. 2007; Turk 2008; Wagner 2010; Davis 2011), only a few of them have shown evidence of citation advantage through gold route OA publications (Shin 2003; Eysenbach 2006). According to Wray (2016), the supposed citation benefit reported by Sotudeh et al. (2015) was an artifact of the method used in measuring impact, as such citation advantage was absent in humanities and social sciences. Apart from this, Beall (2013) contended that the entrance of predatory journal publishers cast serious doubt on the success of gold route open access model. Other recent studies alluded to the danger of predatory open access journals in remarking that the major interest of such journals was mainly article processing charges rather than the scholarly peer review mechanism of reputable journals (Shen & Bjork 2015; Webster & Butler 2014; Christopher & Young 2015). Others studies have equally questioned the quality control mechanism in OA publishing. Harnad (1998) underscored the need for peer review process in science and insisted that works must undergo peer review so that other researchers would rely on the paper for further research. Beall (2013) argued that the ability to pay APC is now a major determinant in accepting papers rather than the quality of the paper, usually determined through peer review mechanism, resulting in many referring to OA publishing as “pay to say.” Beall (2013) remarks that misconduct, such as piracy and plagiarism (including self-plagiarism), have been confirmed by searching plagiarized passages on the Internet, and these peer review related issues have begun to cast doubt on whether some research results are procedurally scientific. Given these problems associated with gold route open access, researchers are worried about the fate of the open access movement in achieving free access to research literature. Harnad (2015) had argued that the best way to optimize a 100% open access is a self-archiving mandate to populate various institutional and research repositories all over the world. Ezema (2011) had earlier highlighted the need for development of institutional repositories, particularly in developing countries, for wider visibility of research outputs. A related work (Ezema & Ugwu 2013) also underscored the relevance of creating electronic theses and dissertations to provide wide access to primary research findings of African origin. Methods This study adopted a descriptive informetric approach and extracted data from DOAJ with several indictors related to this study. DOAJ has a built-in search mechanism capable of filtering journals by title, subject, type of OA route, publishers, country of publication, and year added to the database, among other metadata. At the time of this study there were 104 engineering and technology journals listed in DOAJ, out of which 37 request article processing charges, while 67 do not. Hybrid journals were excluded from the journals used for the analysis, because article-level deference is beyond the scope of the methodology employed in the study. The details about the journals used for the study and their status in the major international indexing bodies are provided in Appendix 1. The journal titles were entered into Harzing’s Publish or Perish (PoP) software (Harzing 2007) to extract relevant data for measurement of research impact. Google Scholar was used to extract informetric data of the journals, namely the total number of papers, total number of citations, number of citations per paper, number of citations per year, and h-index for a five-year period. The extracted data was manually cleaned to remove duplicate citation data and incorrect citations. One of the non-APC journals (EAI Endorsed Transactions on Wireless Spectrum) was not recognized by the Publish or Perish software, so, it was dropped from the list and only 66 non-APC journals and 37 APC journals were used for this analysis. Data on citation indicators of the journals were exported to Microsoft Excel to determine their research impact. These journals were searched in two other major indexing bodies, namely, Web of Science (WoS) and Scopus, for comparison of their research impact. Unfortunately, the search yielded very low results, as only three of the journals were indexed in WoS and 11 in Scopus. The article publication charges paid for each of the journals was obtained from the DOAJ web site and converted to US dollars using the exchange rate available online at the time of the study. The correlation of the research impact of the journals was based only on the data from Google Scholar, because of the very low presence of the journals in WoS and Scopus. The SPSS statistical package was used to determine the correlation between APC (in US dollars) and the research impact measured by h-index, citation counts, and number of papers published by the top twenty gold route OA (APC) journals. The same statistical software was used to investigate the correlation of h-index between APC and non-APC titles. Results Of the 37 APC journals studied, Microsystems & Nanoengineering has the highest APC of $3,471.50 and Journal Keteknikan Pertanian has the lowest ($7.60), with an average APC of $727.00. Appendix 1 provides a list of the APC charges of each journal. It is important to observe that the journal with highest APC is not among the top twenty ranked gold route journals, and the high ranked APC journals have relatively lower charges than other low ranked journals. Table 1. Publishers of gold route (APC) journals Publishers Number of Journals % Hindawi 10 27.0 Elsevier 5 13.5 Springer 3 8.1 MDPI 2 5.4 Taylor & Francis 2 5.4 BioMed Central 1 2.7 Other institutional publishers 14 37.9 Total 37 100 Publishers of gold route open access journals are presented in Table 1, showing that commercial publishers (Hindawi, Taylor & Francis, Elsevier, Springer, and MDPI) account for over 60% of all the titles (see Appendix 2 for a list of APC journals and their publishers). Fourteen institutional publishers have one journal each. Table 2. Research impact of gold route (APC) and Non-APC journals (N = 103) Type of OA Journal Number of Journals Total Papers Paper/journal Total Citations Cite/Journal Cite/Paper Total H-Index Mean H-Index Gold route (APC) 37 12403 335.2 51454 1390.7 4.2 351 9.5 Non-APC Journals 66 11812 178.0 20199 306.1 1.7 338 5.1 Total 103 24215   71653     689   A comparison of the research impact of APC and non-APC open access journals is presented in Table 2. Evidently, APC journals have greater research impact despite there being fewer than non-APC journals. Similarly, the APC journals published more articles than non-APC journals. More surprisingly, APC journals received 71.8% of the total citations. Therefore, in terms of citations, cite per paper, and cite per journal, APC journals are performing better, and the mean h-index is higher, than non-APC journals. The growth of open access journals in engineering and technology has been very slow, but the growth rate is higher with non-APC than APC OA, as can be seen in Table 3. DOAJ began hosting two journals in 2002. In 2009, it recorded a growth rate of 4.4% until 2013, when there was a growth rate of 13% for APC journals, with the highest growth rate of 27% in 2015. The non-APC journals, however, have their highest growth rate of 46% in 2015. Table 3. Trends in adoption of open access journals as reflected in DOAJ Years APC % APC titles Non-APC % of non-APC titles Total APC and non-APC titles % of all OA titles 2016 9 24.3 20 29.9 29 25.4 2015 10 27.0 31 46.3 41 44.7 2014 2 5.4 3 4.5 5 4.4 2013 5 13.5 2 3.0 7 6.1 2012 1 2.7 4 6.0 5 4.4 2011 1 2.7 2 3.0 3 2.6 2010 0 0 1 1.5 1 0.9 2009 3 8.1 2 3.0 5 4.4 2008 0 0 0 0 0 0 2007 2 5.4 0 0 2 1.8 2006 1 2.7 1 1.5 2 1.8 2005 0 0 1 0 1 0.9 2004 1 2.7 0 0 1 0.9 2003 0 0 0 0 0 0 2002 2 5.4 0 0 2 1.8 Total 37   67   104   The result of the correlation of the amount paid for article processing charges (APC), valued in US dollars, and research impact of the journals measured by number of papers published, citation counts, and h-index is shown in the correlation matrix (see Table 4). Interpretation of correlation coefficient (r) was determined using Rumsey (2010), which provides that r value close to 0.30 is weak, 0.50 is moderate, 0.70 is strong, and 1 is perfect correlation. The correlation between APC and number of papers published is weak and not significant (r = 0.275, p ˃ 0.05), but APC has a significant positive, but weak, correlation with citations (r = 0.366, p < 0.05). In the same way, APC has a significant positive but weak correlation with the h-index of the journals (r = 0.392, p < 0.05.) The implication of this finding is that the amount of the article processing charge has very little relationship with the research impact of the journals. Table 4. Spearman's rho correlation matrix of APC and journal research impact     APC (in US$) Papers Cites H-index APC Correlation Coefficient 1.000 .275 .366* .392*   Significance (2-tailed) - .099 .026 .016 Papers Correlation Coefficient .275 1.000 .800** .753**   Significance (2-tailed) .099 - .000 .000 Cites Correlation Coefficient .366* .800** 1.000 .951**   Significance (2-tailed) .026 .000 - .000 H-index Correlation Coefficient .392* .753** .951** 1.000   Significance (2-tailed) .016 .000 .000 - N   37 37 37 37 *Correlation is significant at the 0.05 level (2-tailed). **Correlation is significant at the 0.01 level (2-tailed). Discussion Findings of this study provide greater understanding of the scholarly implications of the gold route open access publication model. With more non-APC open access model journals in engineering and technology, one would have expected minimal article processing charges from gold OA journals, but many of the journals collect more than $1,000, with an average APC of $727. These charges are extremely high and do not reflect the income of many scholars, particularly in the developing countries, where the average monthly salary is usually less than $1,000. This is why many studies have leveled criticisms against high APC for many gold route OA journals (see Cozzarelli et al. 2004; Dallmeier et al. 2010). These charges may also account for the reluctance of institutions and authors to pay, as has been reported by Harnad (2015). With this development, the philosophy behind the open access movement is jeopardized, because a large majority of authors are excluded from the opportunity of publishing in journals of their choice once they cannot afford APC. It is not surprising that commercial publishers dominate gold route open access publishing, given the economics of academic publishing. Previous studies (Walters & Linvill 2011; Solomon & Bjork 2012a) have often associated gold route (APC) open access publishing with commercial publishers who are interested in increasing profit margin. Already, a lot of the journals are hybrid journals, where authors have option of paying APC for open access or publish without open access. This development relates to the concern of Guédon (2008), when he accused commercial publishers of creating an elite club that takes advantage of authors’ interest in publishing in higher impact open access journals, where their papers are freely shared among colleagues across the globe for wider readership and greater research impact. As can be observed, almost half of the journals in this study are published by Hindawi, Elsevier, and Springer. (Guédon 2008; Bjork 2012; Solomon & Bjork 2012b) have earlier identified these established companies as pioneers of APC gold route open access publishing, and they have continued to popularize it ever since. In the field of engineering and technology, APC journals have greater research impact than their non-APC counterparts in all the research indicators, such as number of papers published, citations, h-index, and citations per paper. Findings revealed that even though the gold route APC had fewer journals, they published over 50% of all papers and generated over 70% of the total citations. This is in line with earlier studies (Shin 2003; Eysenbach 2006). Though, open access publishing implies that all the journals are freely available on the Internet, providing equal opportunity for visibility and access, many readers would be more interested in accessing journals from established publishing companies and indexed in major international databases such as Web of Science and Scopus. A close observation of the performance of the journals revealed that the top twenty journals are published by established commercial publishing companies, where many authors usually submit their papers. A content analysis of papers published in these journals may provide a better insight in the quality of papers published in both OA types. This study also shows that engineering and technology journals have a slow growth rate in open access publishing with only two journals in 2002 and increasing slowly until 2015 and 2016. This is contrary to the reported rapid growth of OA publishing in a study by Laakso et al. (2011), but supports the findings of Dallmeier et al. (2010), which attributed the slow growth to high APC; and it could also be that the growth of APC journals varies according to disciplines. Although findings reveal a correlation between article processing charges and research impact of the journals, the effect size is relatively small. This is contrary to the belief of many authors who pay APC to increase their research impact. This assumption has been reflected in several studies that identify research impact and reputation of the journals as major considerations in selection of publication outlets of their papers (see Bjork & Holmström 2006; Schroter et al. 2006). This finding increases the contentious nature of research impact of APC journals, which Wray (2016) has questioned. Although Shin (2003) and Eysenbach (2006) found citation advantage of APC over non-APC journals, the studies failed to show whether this advantage correlates with the article processing charges of the journals and how significant is the correlation. The concern here is whether the introduction of APC by publishers has any scholarly benefits. Beall's (2013) argument that the major concern of gold route publishing is the ability to pay rather than the scholarly quality of the papers should be taken very seriously. Researchers should also worry about the level of peer review mechanism of gold route OA journals, which Harnad (1998) and Beall (2013) have questioned. Implications for Scholarly Communication and Open Access Movement The enthusiasm to embrace the open access movement by the global scientific community as a solution for the serials crisis in libraries has been underscored by a number of scholars (Dallmeier et al. 2010; Ezema 2011, Ezema & Onyancha 2016; Walters & Linvill 2011). However, the introduction of APC by some publishing companies excludes a large majority of authors from contributing to the scholarly communication process. The major interest of authors is to widely disseminate their research findings to colleagues using reputable and widely circulated journals. Though it is yet to be established whether interest in APC is mainly for higher profit margin, publishers could be swayed by the high charges to the detriment of quality assurance. Such could also increase the possibility of ignoring some quality research papers. Many are interested in the open access movement, because it tries to bridge the knowledge gap and digital divide between the advanced countries and the developing countries (Peekkhaus & Proferes 2015; Fox & Hanlon 2015). Studies have shown that research and knowledge production in developing countries, particularly in Africa, is comparatively low (Ezema 2010; Gaillard 2010; Nwagwu 2013), but the gold route OA publishers are increasingly reducing research productivity of low-income countries through high APC. Though some publishers may grant a waiver of the charge, when authors apply, these waivers may not be forthcoming. It has been shown that gold route OA is usually funded by grants from organizations and institutions (Solomon & Bjork 2012b), but research funding in low-income countries is rare or completely absent. Considering the income of such researchers, few authors can afford the high charges of many gold route journals. The obvious implication is that quality research papers from these disadvantaged authors may never be published in gold route OA, where they are likely to receive higher research impact, and this perpetuates low knowledge production in low-income countries and robs the global research community of quality papers that would have contributed to the advancement of scientific knowledge. For years, libraries have borne the burden of providing research literature to their teeming users, and that is why librarians were concerned about the serials crisis in late 1990's and early 2000's. The expectation is that with the open access initiative, this financial burden on libraries will be reduced, but the introduction of APC journals appears to have compounded the problem. The so-called hybrid journals accept APC from authors and institutions, and, this notwithstanding, libraries still pay subscription fees for users to access articles in the same journals. This double payment denies many institutions and libraries funds that could have been channeled to other areas to satisfy the demands of the users for their research. The philosophy behind the Budapest Open Access Initiative is to provide free availability of information, which by extension implies the publication of such information for wider visibility and access. The concern here is that APC appears to be a constraint to the free flow of information and erodes the philosophy of open access. Scholars have already observed that it is an attempt to create an opportunity for established publishers to monopolize academic publishing (see Beall 2013; Bjork 2012; Harnad 1998; Harnad 2015) racking up millions of dollars at the expense of authors and funding agencies. This negates all that the open access movement represents, and there is a need to create awareness on the dangers of APC on scholarly communication and the open access movement. This is why authors, libraries, institutions, and professional associations should give serious consideration to self-archiving articles in repositories, as has been recommended by a number of studies (Ezema 2011; Harnad 1998; Harnad 2015). This green route option provides a good alternative for authors; and since some of the toll access journals allow for archiving of articles, Harnad (2015) posits that with self-archiving mandates from institutions and organizations, there would be 100% open access to research literature, if authors would ignore the antics of gold route open access publishers. Conclusion Open access publishing is an attempt to promote free access to information to the global scientific community. This paper has attempted to contribute to the debate on open access publishing with a focus on the research impact of gold route open access journals in relation to article processing charges, which the journals request from author and funding bodies. In engineering and technology, a greater proportion of OA journals that request APC are published by established publishing companies who can charge more than $2,000. Though APC journals have greater research impact as seen in the findings, the research impacts of the journals do not seem to justify the high APC charges from the publishers, since there are only weak correlations between the charges and the research impact metrics, such as citations and h-index, and no significant correlation in terms of number of papers published. The increasing number of APC journals over the years should, therefore, be a source of concern, given the high charges as it appears to be antithetical with the philosophy of open access movement and scholarly communication. This therefore, justifies the need for increased awareness of the danger of gold route open access publishing for the global scientific community. If free flow of information in line with the open access movement must be guaranteed, the gold route open access model should be discouraged and researchers should be encouraged to freely disseminate their research outputs through self-archiving in repositories and other available channels. References Antelman, K. 2004. Do open-access articles have a greater research impact? College & Research Libraries 65(5):372-382. DOI: 10.5860/crl.65.5.372. Beall, J. 2013. Predatory publishing is just one of the consequences of gold open access. Learned Publishing 26:79–84. DOI: 10.1087/20130203 Bird, C. 2010. Continued adventures in open access: 2009 perspective. Learned Publishing 23(2):107–116. DOI: 10.1087/20100205 Bjork, B.-C. 2012. The hybrid model for open access publication of scholarly article: A failed experiment? Journal of the American Society for Information Science and Technology 63(8):1496–1504. DOI: 101002/asi.22709. Björk, B.-C., & Holmström, J. 2006. Benchmarking scientific journals from the submitting author’s viewpoint. Learned Publishing 19(2):147–155. DOI: 10.1087/095315106776387002 Christopher, M.M. & Young K.M. 2015. Awareness of “predatory” open-access journals among prospective veterinary and medical authors attending scientific writing workshops. Frontiers in Veterinary Science 2:1–11. DOI: 10.3389/fvets.2015.00022. Coupé, T. 2004. What do we know about ourselves? On the economics of economics. KYKLOS 57(2):197–216. DOI: 10.1111/j.0023-5962.2004.00250.x Cozzarelli, N., Fulton, K. & Sullenberger, D. 2004. Results of a PNAS author survey on an open access option for publication. Proceedings of the National Academy of the Sciences 101(5):1111. DOI: 10.1073/pnas.0307315101. Craig, I.D., Plume, A.M., McVeigh, M.E., Pringle, J. & Amin, M. 2007. Do open access journals have greater citation impact? A critical review of the literature. Journal of Informetrics 1:239–248. DOI: 10.1016/j.joi.2007.04.001 Dallmeier-Thiessen, S., Goerner, B., Darby, R., Hyppoelae, J., Igo-Kemenes, P., Kahn, D., Lambert, S., Lengenfelder, A., Leonard, C., Mele, S., et al. 2010. Open access publishing—models and attributes, SOAP project report, Max Planck Society Digital Library. Retrieved from: http://edoc.mpg.de/478647. Davis, P.M. 2011. Open access, readership, citations: A randomized control trial of scientific journal publishing. FASEB Journal 25:2129–2134. DOI: 10.1096/fj.11-183988. Eysenbach, G. 2006. Citation advantage of open access articles. PLoS Biology 4(5):e157. DOI: 10.1371/journal.pbio.0040157. Ezema, I.J. 2010. Trends in electronic journal publishing in Africa: An analysis of African Journal Online (AJOL). Webology 7(1). Available at https://webology.org/data-cms/articles/20200515040154pma74.pdf. Ezema, I.J. 2011. Building open access institutional repositories for global visibility of Nigerian scholarly publication. Library Review 60(6):473–485. DOI: 10.1108/00242531111147198. Ezema, I.J. & Onyancha, O.B. 2016. Status of Africa in the global open access directories: Implications for global visibility of African scholarly research. Fourth CODESRIA Conference On Electronic Publishing: Open Access Movement and the Future of African Knowledge Economy, Dakar, Senegal March 30 – April 1, 2016. Available at https://www.codesria.org/IMG/pdf/ezema_onyancha.pdf. Ezema, I.J. & Ugwu, C.I. 2013. Electronic theses and dissertations in Nigeria university libraries: Status, challenges and strategies. Electronic Library 31(4):493–507. DOI: 10.1108/EL-08-2011-0118. Fox, M. & Hanlon, S.M. 2015. Barriers to open access uptake for researchers in Africa. Online Information Review 39(5):698–716. DOI: 10.1108/OIR-05-2015-0147. G7 Academies 2017. New economic growth: The role of science, technology, innovation and infrastructure. Retrieved from http://www.scj.go.jp/ja/info/kohyo/pdf/kohyo-23-gs2017-5.pdf. Gaillard, J. 2010. The characteristics of R&D in developing countries. Science, Technology and Society 15:77–111. DOI: 10.1177/097172180901500104. Guédon, J.-C. 2004. The “green” and “gold” roads to open access: The case of mixing and matching. Serials Review 30(4):315–328. DOI: 10.1080/00987913.2004.10764931. Guédon, J.-C. 2008. Mixing and matching the green and gold roads to open access – Take 2. Serials Review 34(1):41–51. DOI: 10.1080/00987913.2008.10765151. Harnad, S. 1998.The invisible hand of peer review. Nature. DOI: 10.1038/nature28029. Harnad, S. 2015. Optimizing open access policy. Serials Librarian 69(2):133–141. DOI: 10.1080/0361526X.2015.1076368. Harnad S., Brody T., Valliáres F., Carr L., Hitchcock S., Gingras Y., Oppenheim C., Stamerjohanns H. & Hilf E.R. 2004. The access/impact problem and the green and gold roads to open access. Serials Review 30(4):310-314. DOI: 10.1080/00987913.2004.10764930. Harzing, A. W. 2007. Publish or perish. Available at https://harzing.com/resources/publish-or-perish. Laakso, M., & Bjork, B.-C. 2012. Anatomy of open access publishing: A study of longitudinal development and internal structure. BMC Medicine 10:124. DOI: 10.1186/1741-7015-10-124. Laakso, M., Solomon, D. & Bjork, B.-C. 2016. How subscription-based scholarly journals can convert to open access: A review of approach. Learned Publishing 29:259-269. DOI: 10.1002/leap.1056. Laakso, M., Welling, P., Bukvova, H., Nyman, L., Björk, B.-C., & Hedlund, T. 2011. The development of open access journal publishing from 1993 to 2009. PLoS ONE 6(6):e20961. DOI: 10.1371/journal.pone.0020961. Mashi, S.A., Inkani, I.I. & Yaro, A. 2014. An appraisal of the role of science and technology in promoting national development efforts in Nigeria. International Journal of Engineering and Science 3(2):56-67. Available at http://www.theijes.com/papers/v3-i2/Version-3/G032030056067.pdf. McVeigh, M.E. & Pringle, J.K. 2005. Open access to the medical literature: How much content is available in published journals? Serials 18(1):45–50. DOI: 10.1629/1845. Metcalfe, T.S. 2006. The citation impact of digital preprint archives for solar physics papers. Solar Physics 239:549–553. DOI: 10.1007/s11207-006-0262-7. Nwagwu, W.E. (2013). Open access initiatives in Africa – Structures, incentives and disincentives. The Journal of Academic Librarianship 19(1):3–10. DOI: 10.1016/j.acalib.2012.11.024. Peekkhaus, W. & Proferes, N. 2015. How library and information science faculty perceive and engage with open access. Journal of Information Science 41(5):640-661. DOI: 10.1177/0165551515587855. Rumsey, D.J. 2010. Statistical Essentials For Dummies. New York, John Wiley. Sánchez-Tarragó N. & Fernández-Molina J.C. 2009. The open access movement and Cuban health research work: An author survey. Health Information and Libraries Journal 27:66-74. DOI: 10.1111/j.1471-1842.2009.00852.x. Schroter, S., Tite, L., Hutchings, A. & Black, N. 2006. Differences in review quality and recommendations for publication between peer reviewers suggested by authors or by editors. Journal of the American Medical Association 295(3):314–317. DOI: 10.1001/jama.295.3.314. Shamash, K. 2016. Article Processing Charges (APCs) and Subscriptions: Monitoring Open Access Costs. Bristol: JISC. Shen, C. & Björk, B.-C. 2015. Predatory open access: A longitudinal study of article volumes and market characteristics. BMC Medicine 13(230):1-15. DOI: 10.1186/s12916-015-0469-2. Shin, E.-J. 2003. Do impact factors change with change of medium? A comparison of impact factor when publication is by paper and through parallel publishing. Journal of Information Science 29(6):527–533. DOI: 10.1177/0165551503296009. Solomon, D.J. & Bjork, B.-C. 2012a. A study of open access journals using article processing charges. Journal of the American Society for Information Science and Technology 63(8):1485–1495. DOI: 10.1002/asi.22673. Solomon, D.J. & Björk, B.-C. 2012b. Publication fees in open access publishing: Sources of funding and factors influencing choice of journal. Journal of the American Society for Information Science and Technology 63(1):98-107. DOI: 10.1002/asi.21660. Sotudeh, H., Ghasempour, Z., & Yaghtin, M. 2015. The citation advantage of author-pays model: The case of Springer and Elsevier OA journals. Scientometrics 104:581–608. DOI: 10.1007/s11192-015-1607-5. Stenson, L. 2011. The development of Directory of Open Access Journals. Sciecominfo: Nordic-Baltic Forum for Scientific Communication 7(1):1-4. Available from http://journals.lub.lu.se/index.php/sciecominfo/article/view/4912. Swan, A., & Brown, S. 1999. 'WHAT AUTHORS WANT:' The ALPSP research study on the motivations and concerns of contributors to learned journals. Learned Publishing. 12(3):170-172. DOI: 10.1087/09531519950145742. Swan, A., & Brown, S. 2004. Authors and open access publishing. Learned Publishing 17:219–224. DOI: 10.1087/095315104323159649. Tenopir, C., Dalton, E., Christian, L., Jones, M.K., McCabe, M., Smith,M. & Fish, A. 2017. Imagining a gold open access future: Attitudes, behaviors, and funding scenarios among authors of academic scholarship. College & Research Libraries 78(6):824–843. DOI: 10.5860/crl.78.6.824. Turk, N. 2008. Citation impact of open access journals. New Library World 109(1/2):65–74. DOI: 10.1108/03074800810846010. United Nations Development Programme. 2018. Human Development Indices and Indicators 2018 Statistical Update. New York: UNDP. Available from http://hdr.undp.org/sites/default/files/2018_human_development_statistical_update.pdf. Wagner, A.B. 2010. Open access citation advantage: An annotated bibliography. Issues in Science and Technology Librarianship 60. DOI: 10.5062/F4Q81B0W. Walters, W.H. & Linvill, A.C. 2011. Characteristics of open access journals in six subject areas. College & Research Libraries 72(4):372-392. DOI: 10.5860/crl-132. Webster, J. & Butler, B. 2014. The good, the muddle and the predatory: Open access journals in marine & aquatic sciences. Presented at the 40th IAMSLIC Conference, Noumea, New Caledonia September 2014. World Bank. 2017. World Development Indicators 2017. Washington, DC: International Bank for Reconstruction and Development. Available from http://hdl.handle.net/10986/26447. Wray, K.B. 2016. No evidence for citation benefit for Author-Pay Open Access Publications in social sciences and humanities. Scientometrics 106:1031–1035. DOI: 10.1007/s11192-016-1833-5. Appendix 1 Open Access Journals in Engineering and Technology with APC Charges and Research Impact   Journals ISSN Date added to DOAJ APC papers Cites Cites/paper Cites/year h-index 1 Mathematical Problems in Engineering 1024-123X 2002 $2,000 4,057 14,304 3.5 2,860.8 49 2 Materials 1996-1944 2009 1400CHF ($1428) 2715 25,113 9.2 5,022.6 47 3 Beilstein Journal of Nanotechnology 2190-4286 2012 Non-APC 827 5,965 7.21 1,193 36 4 Landtechnik 0023-8082 2015 Non-APC 1,403 2,131 1.5 426.2 20 5 Advances in Natural Sciences: Nanoscience and Nanotechnology 2043-6262 2011 Non-APC 420 2,222 5.3 444.4 20 6 Applied Sciences 2076-3417 2012 500CHF ($510) 310 1,388 4.5 277.6 19 7 The International Archives of the Photogrammetry, Remote Sensing and Spatial Information 1682-1750 2015 Non-APC 1,865 2,910 1.6 582 18 8 Engineering Applications of Computational Fluid Mechanics 1994-2060 2015 $1,500 259 1,272 4.9 254.4 17 9 Journal of Environmental Health and Engineering 1735-1979 2006 €600 ($666) 80 659 8.2 131.8 15 10 International Journal of Rotating Machinery 1023-621X 2002 $600 180 803 4.5 160.6 14 11 Latin American Journal of Solids and Structures 1679-7817 2005 Non-APC 135 836 6.2 167.2 13 12 Bioresources and Bioprocessing 2197-4365 2015 Non-APC 76 223 2.9 111.5 12 13 Theoretical and Applied Mechanics Letters 2095-0349 2016 $1,000 415 883 2.1 176.6 12 14 Case Study in Thermal Engineering 2214-157X 2015 $500 102 566 5.6 188.7 12 15 Engineering, Technology & Applied Science Research 2241-4487 €140 ($155.4) 153 390 2.6 78.0 11 16 Advances in Civil Engineering 1687-8086 2009 $600 460 874 2.0 174.8 11 17 Australian Educational Computing 0816-9020 2015 Non-APC 80 243 3.0 48.6 10 18 Paladyn: Journal of Behavioral Robotics 2081-4836 2015 Non-APC 68 363 5.3 72.6 10 19 ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences 2194-9042 2015 Non-APC 356 524 1.5 131 10 20 Journal of Modern Transportation 2095-087X 2007 €1,000 ($1,110) 174 472 2.7 94.4 10 21 Journal of Control Science and Engineering 1687-5249 2015 $600 243 517 2.1 103.4 10 22 Journal of Engineering 2314-4904 2013 $600 182 515 2.8 128.8 10 23 Drinking Water Engineering and Science (DWES) 1996-9457 2009 Non-APC 54 154 2.9 30.8 9 24 Advances in OptoElectronics 1687-563X 2007 $600 103 362 3.5 72.4 9 25 International Journal of Science and Engineering 2086-5023 2012 Non-APC 656 616 0.9 123.2 8 26 Journal of Engineering Research and Technology 2312-2307 2014 Non-APC 21 545 26.0 109 8 27 Case Studies in Engineering Failure Analysis 2213-2902 2015 $500 96 250 2.6 83.3 8 28 Journal of Industrial Engineering 2314-4882 2013 $600 54 177 3.3 35.4 8 29 Nano Convergence 2196-5404 2015 Non-APC 52 163 3.1 54.3 7 30 Advances in Radio Science ARS 1684-9965 2004 €150 ($166.5) 235 334 1.4 66.8 7 31 Mehran University Research Journal of Engineering and Technology 0254-7821 2016 3,000PKR ($28.5) 378 295 0.8 59 7 32 Chinese Journal of Engineering 2314-8063 2013 $600 897 626 0.7 125.2 7 33 Atmospheric Measurement Techniques Discussion 1867-8610 2009 €1,000 ($1,110) 308 337 1.1 67.4 7 34 Turkish Journal of Computer and Mathematical Education 1309-4653 2015 Non-APC 127 192 1.5 38.4 6 35 Tecnura 0123-921X 2012 Non-APC 606 252 0.4 50.4 6 36 Jurnal Teknik ITS 23019271 2015 Non-APC 714 355 0.5 88.8 6 37 Metrology and Measurement Systems 2300-1941 2015 Non-APC 81 160 1.0 32 6 38 Revista Producao Online 1676-1901 2006 Non-APC 262 269 1.0 53.8 6 39 Sensing and Bio-Sensing Research 2214-1804 2016 $750 87 160 1.8 80 6 40 The Journal of Engineering 2051-3305 2013 $1,150 183 116 0.6 38.7 6 41 Ciencia y Tecnologia 1390-4051 2016 Non-APC 58 82 1.4 16.4 5 42 Journal of Daylighting 2383-8701 2015 Non-APC 13 19 1.5 9.5 5 43 Telematika 1829-667X 2016 Non-APC 442 113 0.3 22.6 5 44 Texto Livre: Linguagem e Tecnologia 1983-3652 2015 Non-APC 133 71 0.5 14.2 5 45 Journal of Hebei University of Science and Technology 1008-1542 2015 Non-APC 355 344 1.0 68.8 5 46 Revista Venezolana de Ciencia y Tecnologia de Alimentos (RVCTA) 2218-4384 2015 Non-APC 106 90 0.9 18 5 47 Technologies (Basel) 2227-7080 2014 Non-APC 35 99 2.8 33 5 48 Advances in Science and Technology Research Journal 2080-4075 2015 Non-APC 216 156 0.7 39 5 49 Vestnik Volgogradskogo Gosudarstvenngo Universiteta. Seria 10. Innovacionnaa Deatel’nost’ 2305-7815 2015 Non-APC 225 93 0.4 18.6 5 50 Ingenieria y Ciencia 1794-9165 2012 Non-APC 240 106 0.4 21.2 5 51 Journal of Technology and Science Education 2013-6374 2011 Non-APC 104 106 1.0 21.2 5 52 Bioengineering (Basel) 2306-5354 2014 Non-APC 33 61 1.9 20.3 5 53 Journal of Quality and Reliability Engineering 2314-8055 2013 $600 35 80 2.3 26.7 5 54 Journal of Engineering and Technological Sciences 2337-5779 2015 $100 136 126 0.9 25.2 5 55 Journal of Solid State Lighting 2196-1107 2015 €1,000 ($1,110) 36 115 3.2 23 5 56 Journal of Agricultural Machinery 2228-6829 2016 1,000,000IRR ($32) 75 89 1.2 17.8 5 57 Bibechana 2091-0762 2016 Non-APC 135 65 0.5 13 4 58 Journal of Mechatronics, Electrical Power, and Vehicular Technology 2087-3379 2013 Non-APC 138 86 0.6 17.2 4 59 Journal of Applied Biotechnology Reports 2322-1186 2015 Non-APC 52 12 0.2 6 4 60 Quantum Measurements and Quantum Metrology 2299-114X 2015 Non-APC 10 37 3.7 12.3 4 61 Evropejskij Zurnal Tehniki I Dizajna 2308-6505 2016 Non-APC 39 123 3.2 41 4 62 ComTech 2087-1244 2016 Non-APC 442 41 0.1 8.2 4 63 Cogent Engineering 2331-1916 2014 $1,250 105 86 0.8 43 4 64 Frontiers in Built Environment 2297-3362 2015 $1,900 23 53 2.3 53 4 65 International Journal of Manufacturing Engineering 2356-7023 2014 $600 33 46 1.4 15.3 4 66 Journal Energi Dan Manufaktur 2302-5255 2016 Non-APC 101 27 0.3 5.4 3 67 Scietia cum Industria 2318-5279 2015 Non-APC 37 9 0.2 3 3 68 Tecnologia em Metalurgia Materiais e Mineracao (TMM) 2176-1515 2016 Non-APC 192 38 0.2 7.6 3 69 Tecno Logicas 0123-7799 2013 Non-APC 211 82 0.4 16.4 3 70 Al-Qadisiyah Journal for Engineering Science 1998-4456 2016 $50 19 299 15.7 59.8 3 71 Civil and Environmental Engineering 1336-5835 2016 €60 ($66.6) 69 28 0.4 5.6 3 72 Microsystems & Nanoengineering 2055-7434 2016 £2,650 ($3,471.5) 20 34 1.7 34 3 73 Journal of Rehabilitation in Civil Engineering 2345-4423 2016 Non-APC 34 16 0.5 5.3 2 74 Drinking Water Engineering and Science Discussions 1996-9473 2009 Non-APC 13 12 0.9 2.4 2 75 International Journal of Electronics, Mechanical and Mechatronics Engineering 2146-0604 2015 Non-APC 6 8 1.3 1.6 2 76 Jurnal Tribologi 2289-7232 2016 Non-APC 12 15 1.25 7.5 2 77 Cadernos de Prospeccao 1983-1358 2010 Non-APC 257 33 0.1 16.5 2 78 Multidisciplinary Journal for Education, Social and Technological Sciences 2341-2593 2015 Non-APC 42 10 0.2 5 2 79 REEC: Revista Electronica de Engenharia Civil 2179-0612 2016 Non-APC 76 24 0.3 4.8 2 80 Epistemus 2007-4530 2016 Non-APC 6 14 2.3 2.8 2 81 Bionatura 1390-9347 2016 Non-APC 29 19 0.7 3.8 2 82 Nauka I Tehnika (Science Technique) 2227-1031 2016 Non-APC 9 17 1.9 3.4 2 83 Revista Chilena de Derecho y Tecnologia 0719-2584 2015 Non-APC 41 16 0.4 4 2 84 Case Studies in Fire Safety 2214-398X 2015 $500 22 24 1.9 10.3 2 85 Journal of Applied Engineering Sciences 2247-3769 2015 €40 ($44.4) 97 20 0.2 5 2 86 Jurnal Spektran 2302-2590 2015 $50 54 26 0.5 5.2 2 87 International Journal of Engineering and Technology Innovation 2223-5329 2015 Non-APC 7 1 0.1 0.2 1 88 EAI Endorsed Transactions on Security and Safety 2032-9393 2016 Non-APC 2 6 3.0 6 1 89 International Journal of Advances in Intelligent Informatics 2442-6571 2015 Non-APC 2 6 3 6 1 90 IF-Sophia 2358-7482 2016 Non-APC 4 1 0.3 1 1 91 Journal of Dental Biomaterial 2383-3971 2015 Non-APC 5 2 0.4 0.5 1 92 Engaging Science, Technology, and Society (ESTS) 2413-8053 2016 Non-APC 12 8 0.6 2.7 1 93 Inge@UAN 2145-0935 2015 Non-APC 77 5 0.1 1 1 94 Jurnal Teknosain: Jurnal Ilmiah Sains dan Teknologi 2089-6131 2016 Non-APC 14 2 0.1 0.4 1 95 EAI Endorsed Transactions on Collaborative Computing 2312-8623 2016 Non-APC 3 1 0.3 0.5 1 96 Journal Keteknikan Pertanian 2407-0475 2016 100,000 IDR ($7.6) 3 12 4 12 1 97 Mechanics of Advanced Materials and Modern Processes 2198-7874 2015 €300 ($333) 7 3 0.9 0.4 1 98 RCT Revista de Ciencia e Tecnologia 2447-7028 2016 Non-APC 7 0 0 0 0 99 Acta Tecnologia 2453-675X 2016 Non-APC 3 0 0 0 0 100 EAI Endorsed Transactions on Creative Technology 2409-9708 2015 Non-APC 4 0 0 0 0 101 Mexican Journal of Materials Science and Engineering 2395-9630 2016 Non-APC 15 0 0 0 0 102 International Journal of Research and Innovations in Science and Technology 2394-3858 2015 Non-APC 10 0 0 0 0 103 EAI Endorsed Transactions on e-Learning 2032-9253 2015 Non-APC 2 0 0 0 0 *104 EAI Endorsed Transactions on Wireless Spectrum 2312-6620 2015 Non-APC           * Not Indexed Appendix 2 APC Engineering and Technology Journals and Their Publishers   Journals Publisher 1 Mathematical Problems in Engineering Hindawi 2 Materials MDPI 3 Applied Sciences MDPI 4 Engineering Applications of Computational Fluid Mechanics Taylor & Francis 5 Journal of Environmental Health and Engineering BioMed Central 6 International Journal of Rotating Machinery Hindawi 7 Theoretical and Applied Mechanics Letters Elsevier 8 Case Study in Thermal Engineering Elsevier 9 Engineering, Technology & Applied Science Research ETASR 10 Advances in Civil Engineering Hindawi 11 Journal of Modern Transportation Springer 12 Journal of Control Science and Engineering Hindawi 13 Journal of Engineering Hindawi 14 Advances in OptoElectronics Hindawi 15 Case Studies in Engineering Failure Analysis Elsevier 16 Journal of Industrial Engineering Hindawi 17 Advances in Radio Science ARS URSI 18 Mehran University Research Journal of Engineering and Technology Mehran University 19 Chinese Journal of Engineering Hindawi 20 Atmospheric Measurement Techniques Discussion European Geoscience Union 21 Sensing and Bio-Sensing Research Elsevier 22 The Journal of Engineering Institute of Engineering Tech 23 Journal of Quality and Reliability Engineering Hindawi 24 Journal of Engineering and Technological Sciences Institut Teknologi Bandung 25 Journal of Solid State Lighting Springer 26 Journal of Agricultural Machinery Ferdowsi University of Mashhad 27 Cogent Engineering Taylor & Francis 28 Frontiers in Built Environment Swiss Federal Institute of Technology 29 International Journal of Manufacturing Engineering Hindawi 30 Al-Qadisiyah Journal for Engineering Science Al-Qadisiyah University 31 Civil and Environmental Engineering De Gruyter 32 Microsystems & Nanoengineering IECAS 33 Case Studies in Fire Safety Elsevier 34 Journal of Applied Engineering Sciences University of Oradea 35 Jurnal Spektran Universitas Udayana 36 Journal Keteknikan Pertanian Institut Pertanian Bogor 37 Mechanics of Advanced Materials and Modern Processes Springer This work is licensed under a Creative Commons Attribution 4.0 International License. Issues in Science and Technology Librarianship No. 96, Fall 2020. DOI: 10.29173/istl43.