Online education is an inevitable trend in the era of digital transformation, but effective implementation is not easy. This research was conducted to understand the relationship between interaction and the perceived progress of online learning, under the mediated effect of satisfaction. Data was gathered from 223 full-time learners at nine universities in Vietnam, using Google Forms. Since the study had a mediating variable, the partial least squares structural equation modeling (PLS-SEM) method was used. The results show that learner–lecturer interaction, learner–learner interaction, and learning content have positive impacts on online learning satisfaction. The findings of this study reveal that satisfaction has a positive influence on overall progress, which means that, as satisfaction increases, perceived progress in online learning interaction increases as well. Based on the findings, the authors suggest using the flipped classroom model to increase the interactivity and effectiveness of online teaching. This study sheds new light on the relationship between interactions and perception of progress in online education at private universities in Vietnam's southern region.
Water stored by reservoirs is critical for irrigation, electricity generation, drinking water supply, recreation, fisheries, and flood control. Therefore, the reservoir's water storage volume (SW) must be measured and monitored frequently for better watershed management. Since SW data is often not publicly available, finding a method to quantify SW objectively and accurately but to facilitate local water management is necessary. This study proposes a method for monitoring water surface area and storage volume using multi-sensor satellite remote sensing data through the Tuyen Quang Reservoir case study in Northern Vietnam. Accordingly, the water surface area was first delineated from multi-temporal optical satellite images, such as Landsat series and Sentinel-2 images, using the Modified Normalized Difference Water Index and resampled into 30-m pixel resolution data. Using the Shuttle Radar Topography Mission Digital Elevation Model data, the water depth at each pixel was then calculated by the difference between its elevation and the reservoir shoreline's mean elevation. The results showed that the reservoir's water surface area increased rapidly during 2003-2007 (from 579 ha to 5,516 ha), fluctuated insignificantly in 2008-2020, and reached 7,196 ha in 2021. Consequently, SW was raised from 11.8 million m3 in 2003 to 1.68 billion m3 in 2021. Our estimations agree with the depth and SW of Tuyen Quang Reservoir published in 2019. Our proposed method could be an effective water resource management tool in developing countries where the number of impounding reservoirs increases dramatically yearly without the financial afford to build gauging stations.
The paper examines how Vietnam’s defense diplomacy following a multidirectional and diversified approach works in order to maintain and increase national security and strategic interests since the beginning of the 21st century. In doing so, it aims to clarify conceptual and practical aspects of military diplomacy. In the area of national defense policy, Vietnam strives to ensure stability not only of bilateral relations but also of the strategic environment of the region for the national security and territorial integrity. Furthermore, Vietnam’s defense diplomacy aims to deal with the traditional security issue of sovereignty over the East Sea, thereby maintaining economic development and regime legitimacy. This paper concludes that Vietnam seeks to use defense diplomacy in order to preserve its strategic autonomy in facing security challenges caused by major international powers.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.