Sustainable technology is a rather new subject in sustainability which is paying academics' attention recently. This article provides a bibliometric review of sustainable technology studies in the sustainability area. Data from the Web of Science (WoS), database relating to 1122 publications available between 1970 and 2019 is used. Numerous bibliometric methods are used to do this indication. The VOSviewer software is used to graph the bibliographic documents. The findings revealed that publications around this area have been enhanced considerably in the last decade and the USA is the most dominant country. Furthermore, the co-citation network of references revealed five clusters; the competitive advantage of environmental innovation, the development of sustainable technologies, environmental policy tools, undesirable output solutions, and innovative environmental activities.

No abstract

An alliance is an effective strategy for knowledge-intensive businesses in competition. Yet, little is known about how strategic alliances work within small firms in the telecommunications industry, which plays an essential part in the COVID-19 pandemic infrastructure. The purpose of this article is to examine the impact of strategic alliance on firm performance among small entrepreneurial firms (SEFs) in the telecommunications industry. The study uses structural equation modeling to analyze primary data obtained from a sample of 74 small entrepreneurial firms in the telecommunications sector. We find that strategic alliances significantly and positively impact partners' performance in terms of financial, operational, and organizational effectiveness among small entrepreneurial firms in the telecommunication sector. Drawing on the findings, we recommend small entrepreneurial firms pay particular attention to pre-alliance and post-alliance issues, including partner similarity, alliance experience, partner' reputation, complementary skills, industry scope, commitment to improving trust and skill, and collaboration to boost performance. In addition, based on the results of this study, we discuss research implications for challenges of telecommunications SEFs in the time of the COVID-19 pandemic crisis.

Purpose This paper aims to identify factors that influence the outcomes of academic entrepreneurship at the University of Tehran. Design/methodology/approach The research questionnaires were randomly distributed, and 95 individuals, including professors and experts in the field of academic entrepreneurship at the University, answered the questions. The population was estimated to include 150 subjects; 100 questionnaires were distributed totally; and 95 questionnaires were finally collected. Findings The results obtained from the data analysis indicate that institutions (formal and informal) and organizational factors (resources and capabilities) have a significant impact on the success of academic entrepreneurship. In addition, the results from an effect size analysis revealed that capabilities and informal resources have the strongest impact on the academic entrepreneurship outcomes. Limitations and directions for future research are provided at the end of the study. Originality/value It is a pioneering work that identifies the factors that influence academic entrepreneurship outcomes at the University of Tehran in a specific context such as Iran. Guerrero and Urbano’s (2012) entrepreneurial university model, which is built on the theory of institutional economy (North, 1990) and the resource-based view (Barney, 1991), has been adapted as the theoretical framework.

Wind turbines are of the most promising devices to cut down carbon emissions. However, some phenomena that adversely affect their performance are inevitable. The aim of the present paper is to investigate flow separation prevention exploiting leading edge (LE) single dielectric barrier discharge plasma actuator (SDBD-PA) on an airfoil belonging to a section of a locally developed wind turbine. The numerical results of the surface pressure distribution over the airfoil were compared with the experimental measurements carried out by the authors on the same blade section, and good agreement was found between numerical and experimental data for both plasma-OFF and plasma-ON cases. An in-depth parametric numerical investigation was then carried out to provide a better understanding of the flow behavior affected by the activation of PA over the same airfoil at post stall angle of attacks (AOAs). According to the results, the frequency and voltage of actuation, AOA, and free stream velocity are shown to have strong impacts on separation delay and actuation effectiveness. In Reynolds number of 2.85 × 105, the maximum PA effectiveness takes place at 21° which is approximately 312%, 307%, and 256% corresponding to the PA location of LE, 0.02 chord, and 0.15 chord, respectively. Also, maximum velocity of the domain is increased three times of the free stream velocity on average for three investigated Reynolds numbers at the frequency and voltage of 12 kHz and 12 kV, respectively. Furthermore, the size of the wake area noticeably contracts due to the presence of the SDBD-PA. The results clearly indicate that the lift and drag coefficients as well as the lift-to-drag ratio fit a linear variation pattern with the frequency of actuation. The variation rate of the aforementioned parameters becomes steeper as the peak voltage of actuation increases. Highly nonlinear aerodynamic responses and significant interactions were demonstrated between the investigated parameters.