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173 results on '"Jung, Sang-Min"'

24. Liver Donation After Brain Death Following Intentional Ingestion of 99% E-Cigarette Liquid Nicotine 10 mL

Author

Lee, Jinwoong, primary, You, Yeonho, additional, Park, Jung Soo, additional, Min, Jin Hong, additional, Yoo, Insool, additional, Jeong, Wonjoon, additional, Cho, Yongchul, additional, Ryu, Seung, additional, Kim, Seungwhan, additional, Cho, Sung Uk, additional, Oh, Se Kwang, additional, Lee, Junwan, additional, Ahn, Hong Joon, additional, and Jung, Sang Min, additional

Published
2020
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36. Prediction of Menu selection on Touch-screen Using A Cognitive Architecture: ACT-R

Author

Seongsik Jo, Jung-Sang Min, and Rohae Myung

Subjects
Cognitive model, Cognitive walkthrough, Human–computer interaction, Computer science, Heuristic evaluation, Usability engineering, Cognitive architecture, LIDA, Cognitive robotics, Cognitive ergonomics
Abstract

Cognitive model, that is cognitive architecture, is the model expressed with computer program to show the process how human solve a certain problem and it is continuously under investigation through various fields of study such as cognitive engineering, computer engineering, and cognitive psychology. In addition, the much extensive applicability of cognitive model usually helps it to be used for quantitative prediction of human Behavior or Natural programming of human performance in many HCI areas including User Interface Usability, artificial intelligence, natural programming language and also Robot engineering. Meanwhile, when a system designed, an usability test about conceptual design of interface is needed and in this case, analysis evaluation using cognitive model like GOMS or ACT-R is much more effective than empirical evaluation which naturally needs products and subjects. In particular, if we consider the recent trend of very short-end term between a previous technology development and the next new one, it would take time and much efforts to choose subjects and train them in order to conduct usability test which is repeatedly followed in the process of a system development and this finally would bring delays of development of a new system. In this study, we predicted quantitatively the human behavior processes which contains cognitive processes for menu selection in touch screen interface through ACT-R, one of the common method of usability test. Throughout the study, it was shown that the result using cognitive model was equal with the result using existing empirical evaluation. And it is expected that cognitive model has a possibility not only to be used as an effective methodology for evaluation of HCI products or system but also to contribute the activation of HCI cognitive modeling in Korea.

Published
2010

37. Menu Design for Touchscreen Interfaces

Author

Rohae Myung, Byung Don Kong, and Jung Sang Min

Subjects
Medical Terminology, InformationSystems_MODELSANDPRINCIPLES, Touchscreen, InformationSystems_INFORMATIONINTERFACESANDPRESENTATION(e.g.,HCI), Human–computer interaction, Computer science, law, Interface (computing), Menu design, Medical Assisting and Transcription, law.invention
Abstract

Touchscreens utilize a menu-based interface. Menu-based interfaces are an easy and efficient practice that considers the users' physical and cognitive characteristics. However, the users' behavioral characteristics using touchscreens is quite different from that required in a typical desktop environment. Hence, in this study, an efficient menu-based interface for touchscreens was investigated. It considered different users' physical and cognitive characteristics in a touchscreen environment. A dynamic menu layout was found to be more efficient in both physical and cognitive aspects compared to static menu layouts. Additionally, the columnar structure in menus did not influence users' task-performance in touchscreen interfaces.

Published
2009

43. Enhanced production of 2'‐fucosyllactose from fucose by elimination of rhamnose isomerase and arabinose isomerase in engineered Escherichia coli.

Author

Jung, Sang‐Min, Chin, Young‐Wook, Lee, Ye‐Gi, and Seo, Jin‐Ho

Abstract

2′‐Fucosyllactose (2‐FL), one of the most abundant oligosaccharides in human milk, has been spotlighted for its neutraceutical and pharmaceutical potentials. Microbial production of 2‐FL is promising since it is efficient as compared to other production methods. In 2‐FL microbial production via the salvage pathway for biosynthesis of guanosine 5′‐diphosphate (GDP)‐l‐fucose from fucose, the conversion yield from fucose is important because of the high price of fucose. In this study, deletion of the genes (araA and rhaA) coding for arabinose isomerase (AraA) and rhamnose isomerase (RhaA) was attempted in engineered Escherichia coli for improving 2‐FL production by using fucose, lactose, and glycerol. The engineered E. coli constructed previously is able to express fucokinase/GDP‐l‐fucose pyrophosphorylase (Fkp) from Bacteroides fragilis and the α‐1,2‐fucosyltransferase (FucT2) from Helicobacter pylori and deficient in β‐galactosidase (LacZ), fucose isomerase (FucI), and fuculose kinase (FucK). The additional double‐deletion of the araA and rhaA genes in the engineered E. coli enhanced the product yield of 2‐FL to 0.52 mole 2‐FL/mole fucose, and hence the concentration of 2‐FL reached to 47.0 g/L, which are 44% and two‐fold higher than those (23.1 g/L and 0.36 mole 2‐FL/mole fucose) of the control strain in fed‐batch fermentation. Elimination of sugar isomerases exhibiting promiscuous activities with fucose might be critical in the microbial production of 2‐FL through the salvage pathway of GDP‐l‐fucose. [ABSTRACT FROM AUTHOR]

Published
2019
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44. L‐Fucose production by engineered Escherichia coli.

Author

Liu, Jing‐Jing, Lee, Jae Won, Yun, Eun Ju, Jung, Sang‐Min, Seo, Jin‐Ho, and Jin, Yong‐Su

Abstract

L‐Fucose (6‐deoxy‐L‐galactose) is a major constituent of glycans and glycolipids in mammals. Fucosylation of glycans can confer unique functional properties and may be an economical way to manufacture L‐fucose. Research can extract L‐fucose directly from brown algae, or by enzymatic hydrolysis of L‐fucose‐rich microbial exopolysaccharides. However, these L‐fucose production methods are not economical or scalable for various applications. We engineered an Escherichia coli strain to produce L‐fucose. Specifically, we modified the strain genome to eliminate endogenous L‐fucose and lactose metabolism, produce 2′‐fucosyllactose (2′‐FL), and to liberate L‐fucose from 2′‐FL. This E. coli strain produced 16.7 g/L of L‐fucose with productivity of 0.1 g·L−1·h−1 in a fed‐batch fermentation. This study presents an efficient one‐pot biosynthesis strategy to produce a monomeric form of L‐fucose by microbial fermentation, making large‐scale industrial production of L‐fucose feasible. This study presents an efficient one‐pot biosynthesis strategy to produce L‐fucose by microbial fermentation using engineered Escherichia coli. Specifically, the authors modified the strain genome to eliminate endogenous L‐fucose and lactose metabolism, produce 2‐fucosyllactose (2‐FL), and to liberate L‐fucose from 2‐FL. Finally, this engineered E. coli strain produced 16.7 g/L of L‐fucose with a productivity of 0.1 g·L-1·h-1 in a fed‐batch fermentation. [ABSTRACT FROM AUTHOR]

Published
2019
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