Undergraduate Students from the Department of Computer Science and Engineering Publish a Research Paper in an SCI...
- 작성처
- Date2022.03.30
- 11706
Undergraduate Students from the Department of Computer Science and Engineering Publish a Research Paper in an SCI-grade Journal
Su-ji Yoon and Hee-jin Park
Su-ji Yoon and Hee-jin Park, undergraduate students of the ELTEC College of Engineering majoring in Computer Science and Engineering in the incoming class of 2019, conducted research on drastically reducing DRAM memory consumption in IoT (Internet-of-Things) systems, and published the paper as co-first authors in IEEE Access, a major open access journal of the Institute of Electrical and Electronics Engineers (IEEE) Computer Society.
As the size of data in IoT environments has rapidly increased in recent years, DRAM usage is also increasing alongside a subsequent leap in battery consumption. Real-time systems such as IoT systems are “mission-critical” systems in which it is essential to complete tasks within a fixed time without fail. Since all tasks in such systems reside on the memory, such systems face the problem of high memory consumption because they are unable to use the swapping method to temporarily retain tasks in storage as with general-purpose computer systems.
The undergraduate research team optimized the swap ratio for each task and reduced DRAM usage by 34 percent by employing evolutionary computation, a kind of artificial intelligence (AI) technology. In addition, the team succeeded in saving battery consumption by 31 percent through the combination of memory-swapping technology and CPU voltage scaling technology. While these power-saving technologies generally have the side effect of slowing down task execution, the research team achieved an optimal outcome that met the deadline for all tasks and maximize the power-saving effect through the accurate modeling of the worst-case execution time.
The pertinent research paper, titled “Supporting Swap in Real-Time Task Scheduling for Unified Power-Saving in CPU and Memory,” is the outcome of joint research by the two undergraduates with Research Professor Kyungwoon Cho (third author) and Professor Hyokyung Bahn (corresponding author) during their research internship period for undergraduate students at the Embedded Software Research Center, which marks a meaningful demonstration of the outstanding capabilities of Ewha undergraduates in the Computer Science and Engineering major. The Department of Computer Science and Engineering helps undergraduates to foster their research capabilities by participating in wide-ranging academic research activities through a research internship program and achieve academic accomplishments. Su-ji Yoon and Hee-jin Park, the co-first authors, expressed their feelings about participating in the program, commenting, “We believe we were able to produce positive results in a short period of time by building upon open-source code at the research center, rather than writing the source code required for our experiments from scratch.”
Professor Hyokyung Bahn, who supervised the research as a corresponding author, remarked, “As recent studies in computer science have been conducted using open-source software, the source code for such studies are being made available to the public, rather than only publishing their outcomes in academic papers. This is increasingly cutting down on the time required for creative undergraduate students to produce new results based on existing studies,” and added, “The research outcome of these students was also published in open source, which I hope will challenge other students to achieve even better research outcomes.”