From the perspective of sustainable development and based on literature review, this paper introduces modified Delphi and Decision Making and Trial Evaluation Laboratory (DEMATEL) to explore the critical factors of sustainable development in rural areas and their correlation. Through literature review and modified Delphi analysis, nine key factors of rural sustainable development are first identified, namely industrial activation, working environment, living conditions, infrastructure, public involvement, rural culture, government-related departments, educational resources, and health and welfare. DEMATEL is then adopted to determine the classification of the aforementioned factors, in which four (government-related departments, public involvement, infrastructure, and educational resources) are classified in the cause group and five (health and welfare, living conditions, rural culture, working environment, and industrial activation) are classified in the effect group. According to the centrality and relation of these factors, the causal network diagram is finally drawn before making practical suggestions based on the overall results, with a view to providing a reference for decision-makers in their follow-up rural sustainable development planning.
This research was the first research integrating decision making trial and evaluation laboratory (DEMATEL) and structural equation modeling (SEM) to analysis factors, including interest in science, value in science and confidence in science, affecting female students’ science achievements from the Trends in International Mathematics and Science Study (TIMSS) 2011. The research constructed two causal models base on mutual effect of value in science and confidence in science by DEMATEL analysis. The causality of two factors in model 1 was value in science affected confidence in science and model 2 vice versa. According to the results of SEM analysis, fit indices of CFI, GFI and AGFI in model 1 were 0.851, 0.796 and 0.745; in model 2 were 0.818, 0.772, and 0.873. And results showed that female students had better fitness in model 1; in other words, the causality of value in science to confidence in science might have an important effect on the science achievement of female students. Lastly, these findings could provide not only a different perspective for future researches but also a useful insight as a reference for policy making and improvement by relevant decision makers.
In this study, we analyzed the CO2 emissions of online music and video streaming services, as one of the digital contents, in Japan using life cycle assessment. As a system boundary of online music and video streaming, processes such as data center construction and server manufacturing, usage of communication networks and internet communication technology devices (personal computers (PCs) and smartphones), and disposal of data centers and servers were considered. Data were collected using statistical and online surveys, and CO2 emissions per 1 MB of communication volume were calculated. One of the results revealed that the lifecycle CO2 emissions of listening to online music using PCs and smartphones were 5.88 × 10−4 and 1.43 × 10−4 kg-CO2/MB, respectively. The overall CO2 emissions for domestic music and video streaming services in 2019 was 921 thousand t-CO2. Online video streaming accounted for 87.7% of the total emissions, which corresponded to approximately 0.23% of domestic CO2 emissions derived from electric power generation.
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