Highlights
[Prof. Hyun-Sik Kim, PhD candidate Gyuwan Lim, PhD candidate Gyeong-Gu Kang, from left]
EE professor Hyun-Sik Kim’s team of Ph.D. students received the Prime Minister’s Award at the 23rd Korea Semiconductor Design Challenge.
The 23rd Korea Semiconductor Design Challenge is held to cultivate design skills and discover creative ideas of students within the field of semiconductor design, jointly organized by the Korean Ministry of Trade, Industry and Energy, and the Korea Semiconductor Industry Association (KSIA).
The winners, Gyuwan Lim and Gyeong-Gu Kang, have been selected for the achievement of high resolution and high uniformity with their mobile device Display Driver IC (DDI) design while maintaining an ultra-small chip area.
The DDI chip is a key component of a display system, that converts digital display data into analog signals (digital-to-analog conversion, DAC) and writes them to the display panel. The KAIST team solved the problem of uniformity and increasing chip surface that comes with higher resolution DDI chips.
The award-winning DDI chip design consists of a low-voltage MOSFET with a voltage amplifier instead of the conventional high-voltage MOSFET. This technology dramatically reduces the channel area, further reduced through a novel LSU technology that generates a 10-bit output voltage from an 8-bit input voltage.
The team was able to achieve high uniformity through designing a robust amplifier and chip operation against variations of the CMOS fabrication process. The novel DDI chip design is expected to significantly reduce cost while increasing the quality of mobile device displays through the reduced chip area, while achieving high resolution and high uniformity at the same time.
The results of this study were also presented at ISSCC 2022, a highly reputable international conference in the field of integrated circuits.
[Prof. Myoungsoo Jung, Miryeong Kwon, Seungjun Lee, and Hyunkyu Cho from left]
Our department’s Professor Myoungsoo Jung’s research team has developed the world’s first Predictable Latency Mode (PLM) SSD based hardware and software co-designed framework for Log-Structured Merge Key-Value Stores (LSM KV store).
The research team has developed the ‘hardware and software co-designed framework for LSM KV store, Vigil-KV’ that eliminates long-tail latency by utilizing the Predictable Latency Mode (PLM) interface, which provides constant read latency, to the actual datacenter-scale SSD. Vigil-KV outpoerforms 3.19x faster tail latency and 34% faster average latency compared to the existing LSM KV store.
LSM KV store, a kind of database, is used to manage various application data, and it must process the user requests within the requirement time in order not to degrade the user experience. To this end, Vigil-KV enables a predictable latency mode (PLM) interface on an actual datacenter-scale NVMe SSD (PLM SSD), which guarantees constant read latency in deterministic mode related to read service without performing SSD’s internal tasks.
Specifically, Vigil-KV hardware makes the deterministic mode SSDs exist in the system to remove SSD’s internal tasks by configuring PLM SSD RAID. In addition, Vigil-KV software prevents the deterministic mode from being released by LSM KV store’s internal tasks, scheduling LSM KV store operations (e.x., compaction/flush operations) and client requests.
Among the proposed research results, especially noteworthy is that Vigil-KV is the first work that implements the PLM interface in a real SSD and makes the read latency of LSM KV store deterministic in a hardware-software co-design manner. They prototype Vigil-KV hardware on a 1.92TB datacenter-scale NVMe SSD while implementing Vigil-KV software using Linux 4.19.91 and RocksDB 6.23.0.
The KAIST Ph.D. Candidates (Miryeong Kwon, Seungjun Lee, and Hyunkyu Choi) participate in this research, and the paper (Vigil-KV: Hardware-Software Co-Design to Integrate Strong Latency Determinism into Log-Structured Merge Key-Value Stores) was reported in July, 11th at ‘USENIX Annual Technical Conference, ATC, 2022’. In addition, they has won the Best Paper Award from Samsung for this paper (Vigil-KV) with Professor Jae-Hyeok Choi’s research team.
The Best Paper Award from Samsung recognizes master’s and doctorate students that participated in research grant projects and published papers related to the project among papers adopted by foreign journals/conferences since September 21st. This year’s awards consisted of grand award (2 people), excellence award (1 person), and encouragement award (2 people).
The research was supported by Samsung. More information on this paper can be found at http://camelab.org.
[Prof. Kayoung Lee]
KAIST EE Professor Kayoung Lee is selected for the Young Scholar Award at the 9th Korean Symposium on Graphene and 2D Materials, hold by the Korean Graphene Society.
The Young Scholar Award is awarded to those who have made a great contribution to the Korean graphene and 2D materials field, among academics under the age of 40.
Professor Kayoung Lee, as this year’s awardee, received the award with a prize of 1 million wons.
[Award ceremony picture, Society Chair, Prof. Jong-Hyun Anh, Prof. Kayoung Lee, from left ]
[Prof. Jae-Woong Jeong, Simok Lee, From Left ]
Ph.D. student Simok Lee (Advised by Jae-Woong Jeong) won the Best Paper Award at the 2022 Korean Sensors Society Autumn Conference.
The Korean Sensors Society Conference is a conference held every spring and fall, and this year, and this autumn conference was held in Yeosu from August 24th to 26th.
Ph.D. student Simok Lee has published a paper titled “Adaptive Electronic Skin with High Sensitivity and Large Bandwidth Based on Gallium Microdrop-Elastomer Composite”.
Details are follows. Congratulations once again to Ph.D. student Simok Lee and Professor Jae-Woong Jeong!
Conference: 2022 Korean Sensors Society Autumn Conference
Date: August 24-26, 2022
Award: Best Presentation Paper Award
Authors: Simok Lee, Sang-Hyuk Byun, Jae-Woong Jeong (Advisory Professor)
Paper Title: Adaptive Electronic Skin with High Sensitivity and Large Bandwidth based on Gallium Microdroplet-Elastomer Composite
In the 2022 Fall Semester, KAIST EE Colloquium Lecture Series will be opened.
Classes will be offered online until further notice.
We look forward to seeing many of you at the talk.
-Date: Thursday, 4PM (9.15 ~ 12.08)
-Location: Zoom (scan the QR code on the flyer )
* <Colloquium> requires students to attend at least 6 seminars out of total 12 seminars.
NOTICE
- 2022-05-19
- 2021-11-17
- 2021-11-17
- 2021-09-24
- 2021-04-23
- 2020-12-21
