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189 results on '"Kim, Byung Jun"'

2. A Machine Learning-Based Blood Volume Classification Model for Cardiopulmonary Resuscitation Robot Feedback System

Author

Kim, Byung Jun, Shin, Dong Ah, Sim, Jaehoon, Cho, Woo Sang, Kwon, So Yoon, Suh, Gil Joon, Kim, Kyung Su, Kim, Taegyun, Lee, Jung Chan, Kacprzyk, Janusz, Series Editor, Gomide, Fernando, Advisory Editor, Kaynak, Okyay, Advisory Editor, Liu, Derong, Advisory Editor, Pedrycz, Witold, Advisory Editor, Polycarpou, Marios M., Advisory Editor, Rudas, Imre J., Advisory Editor, Wang, Jun, Advisory Editor, Lee, Soon-Geul, editor, An, Jinung, editor, Chong, Nak Young, editor, Strand, Marcus, editor, and Kim, Joo H., editor

Published
2024
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5. On the Byzantine-Fault-Tolerant Consensus for Blockchain among Connected Vehicles

Author

Kim, Seungmo and Kim, Byung-Jun

Subjects
Computer Science - Distributed, Parallel, and Cluster Computing
Abstract

It is a critical matter for a blockchain system whether a Byzantine fault tolerance (BFT) can be guaranteed during a consensus process. Can connected vehicles (CVs) achieve the BFT consensus when the vehicles keep mobile? This paper seeks an answer to this fundamental question. It focuses on characterizing the impact of mobility on the performance of a BFT consensus among CVs.

Published
2021

21. Beta-blockers after percutaneous coronary intervention for acute myocardial infarction and non-reduced left ventricular ejection fraction.

Author

Jeong, Jun-Chang, Park, Jong-Il, Kim, Byung-Jun, Kim, Hong-Ju, Choi, Kang-Un, Nam, Jong-Ho, Lee, Chan-Hee, Son, Jang-Won, Park, Jong-Seon, Her, Sung-Ho, Chang, Ki-Yuk, Ahn, Tae-Hoon, Jeong, Myung-Ho, Rha, Seung-Woon, Kim, Hyo-Soo, Gwon, Hyeon-Cheol, Seong, In-Whan, Hwang, Kyung-Kuk, Hur, Seung-Ho, and Cha, Kwang-Soo

Published
2024
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28. Paraffinoma of the hands: a case report.

Author

Choi, Jinil, Hwang, HuiBeom, Kwon, Sung Tack, and Kim, Byung Jun

Subjects
SKIN grafting, PERFORATOR flaps (Surgery), FOREIGN bodies, METACARPOPHALANGEAL joint, SURGICAL wound dehiscence
Abstract

Paraffin injection has been widely used to improve body contouring or to augment various body parts, although it has now been abandoned owing to serious complications. Paraffin injection may lead to complications after a long latency period, ranging from several years to several decades. Here, we present the rare case of a 77-year-old woman who suffered from recurrent wound problems after a bilateral paraffin injection into her hands 40 years ago. Initially, conservative debridement was carried out due to the patient's reluctance to undergo extensive surgery and cost concerns. However, this resulted in recurrent wound dehiscence and infection. After serial debridement procedures, a skin graft was performed on her right hand. The patient complained of a depressed contour and numbness at the skin graft site, and tightness and discomfort of her right hand during flexion of the metacarpophalangeal joint. Three years later, the patient presented with a highly similar wound on her left hand. Thorough excision of the soft tissue infiltrated by paraffin was performed, followed by reconstruction using a sensate free anterolateral thigh flap. The patient responded well postoperatively without complications, displaying a fair range of motion without discomfort, sensory restoration of the flap, and satisfaction with the contour of the dorsum. This case report highlights the importance of complete excision of soft tissues infiltrated by paraffin for definitive treatment. Among the various reconstruction options, a sensate free flap is a good choice for achieving favorable functional and esthetic outcomes in hand reconstruction after radical excision of a paraffinoma. [ABSTRACT FROM AUTHOR]

Published
2024
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29. Temperature Effect on Deformation Mechanisms and Mechanical Properties of Welded High-Mn Steels for Cryogenic Applications.

Author

Park, Minha, Lee, Gang Ho, Park, Geon-Woo, Jang, Gwangjoo, Kim, Hyoung-Chan, Noh, Sanghoon, Jeon, Jong Bae, Kim, Byoungkoo, and Kim, Byung Jun

Subjects
SUBMERGED arc welding, HEAT treatment, MARTENSITIC transformations, DEFORMATIONS (Mechanics), TEMPERATURE effect
Abstract

High-manganese steel (high-Mn) is valuable for its excellent mechanical properties in cryogenic environments, making it essential to understand its deformation behavior at extremely low temperatures. The deformation behavior of high-Mn steels at extremely low temperatures depends on the stacking fault energy (SFE) that can lead to the formation of deformation twins or transform to ε-martensite or α′-martensite as the temperature decreases. In this study, submerged arc welding (SAW) was applied to fabricate thick pipes for cryogenic industry applications, but it may cause problems such as an uneven distribution of manganese (Mn) and a large weldment. To address these issues, post-weld heat treatment (PWHT) is performed to achieve a homogeneous microstructure, enhance mechanical properties, and reduce residual stress. It was found that the difference in Mn content between the dendrite and interdendritic regions was reduced after PWHT, and the SFE was calculated. At cryogenic temperatures, the SFE decreased below 20 mJ/m2, indicating the martensitic transformation region. Furthermore, an examination of the deformation behavior of welded high-Mn steels was conducted. This study revealed that the tensile deformed, as-welded specimens exhibited ε and α′-martensite transformations at cryogenic temperatures. However, the heat-treated specimens did not undergo α′-martensite transformations. Moreover, regardless of whether the specimens were subjected to Charpy impact deformation before or after heat treatment, ε and α′-martensite transformations did not occur. [ABSTRACT FROM AUTHOR]

Published
2024
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34. A remote-controlled automatic chest compression device capable of moving compression position during CPR: A pilot study in a mannequin and a swine model of cardiac arrest

Author

Suh, Gil Joon, primary, Kim, Taegyun, additional, Kim, Kyung Su, additional, Kwon, Woon Yong, additional, Kim, Hayoung, additional, Park, Heesu, additional, Wang, Gaonsorae, additional, Park, Jaeheung, additional, Hur, Sungmoon, additional, Sim, Jaehoon, additional, Kim, Kyunghwan, additional, Lee, Jung Chan, additional, Shin, Dong Ah, additional, Cho, Woo Sang, additional, Kim, Byung Jun, additional, Kwon, Soyoon, additional, and Lee, Ye Ji, additional

Published
2024
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