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2,392 results on '"Choi, Seung Ho"'

152. The Korea Cohort Consortium: The Future of Pooling Cohort Studies

Author

Lee, Sangjun, primary, Ko, Kwang-Pil, additional, Lee, Jung Eun, additional, Kim, Inah, additional, Jee, Sun Ha, additional, Shin, Aesun, additional, Kweon, Sun-Seog, additional, Shin, Min-Ho, additional, Park, Sangmin, additional, Ryu, Seungho, additional, Yang, Sun Young, additional, Choi, Seung Ho, additional, Kim, Jeongseon, additional, Yi, Sang-Wook, additional, Kang, Daehee, additional, Yoo, Keun-Young, additional, and Park, Sue K., additional

Published
2022
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163. Skin-Color Based Human Tracking Using a Probabilistic Noise Model Combined with Neural Network

Author

Kim, Jin Young, Song, Min-Gyu, Na, Seung You, Baek, Seong-Joon, Choi, Seung Ho, Lee, Joohun, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Wang, Jun, editor, Yi, Zhang, editor, Zurada, Jacek M., editor, Lu, Bao-Liang, editor, and Yin, Hujun, editor

Published
2006
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167. Commercial Fixed-Wing Drone Redirection System Using GNSS Deception

Author

Chae, Myoung-Ho, Park, Seong-Ook, Choi, Seung-Ho, and Choi, Chae-Taek

Abstract

As drones become more common today, the threat of reconnaissance or attack drones to core facilities has increased, and countermeasures against them have become essential. In this study, a drone redirection system was proposed to counter the illegal intrusion of commercial fixed-wing drones. The drone redirection system was designed as a closed-loop system that automatically redirects the drone to a target position. The main novelty of this study is a proposed system that can automatically redirect a commercial fixed-wing drone, which has not been previously explored. We proposed two strategies for redirecting drones. Additionally, simple drone modeling with a path-following algorithm was used to easily model various drones. The drone model was then tuned using flight test data, and the results were compared. Simulations were performed on the designed drone redirection system model to verify the performance of the two proposed strategies for redirecting drones in conjunction with drone fail detection and innovation check. The performance of the drone redirection system was assessed through flight tests of Remo-M and simulations of MicroPilot's Hardware-in-the-Loop Simulator (HWILS). Through simple drone modeling, drone flight tests, and the test results from HWILS, it was proved that the drone redirection system can be applied to various fixed-wing drones.

Published
2023
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175. A Forward-Backward Voice Packet Loss Concealment Algorithm for Multimedia over IP Network Services

Author

Lee, Mi Suk, Kim, Hong Kook, Choi, Seung Ho, Lee, Eung Don, Kim, Do Young, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Aizawa, Kiyoharu, editor, Nakamura, Yuichi, editor, and Satoh, Shin’ichi, editor

Published
2005
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179. Preoperative cephalhematoma size measured with computed tomography predicts intraoperative bleeding in pediatric patients undergoing cranioplasty

Author

Kim, Seung Hyun, Min, Kyeong Tae, Park, Eun Kyung, Rhee, Hyungjin, Yang, Hyukjin, and Choi, Seung Ho

Subjects
medicine.medical_specialty, medicine.medical_treatment, Neurosurgery, Hemorrhage, Blood volume, Computed tomography, 03 medical and health sciences, Blood component transfusion, 0302 clinical medicine, Clinical Research, 030202 anesthesiology, medicine, Risk factor, medicine.diagnostic_test, Receiver operating characteristic, business.industry, Area under the curve, General Medicine, Neuroanesthesia, medicine.disease, Cranioplasty, Birth injury, 030220 oncology & carcinogenesis, Radiology, business
Abstract

Background: Cranioplasty for the treatment of cephalhematomas in small infants with limited blood volume is challenging because of massive bleeding. This study aimed to elucidate the correlation between cephalhematoma size and intraoperative blood loss and identify criteria that can predict large intraoperative blood loss.Methods: We reviewed the medical records of 120 pediatric patients aged less than 24 months who underwent cranioplasty for treatment of a cephalhematoma. The cephalhematoma sizes in preoperative brain computed tomography (CT) were measured using ImageJ. Results: Pearson correlation showed that the cephalhematoma size in the pre-operative brain CT was weakly correlated with intraoperative blood loss (Pearson coefficient = 0.192, P = 0.037). In a multivariable logistic regression analysis, a cephalhematoma size greater than 113.5 cm3 was found to be a risk factor for large blood loss. The area under the curve in the receiver operating characteristic plot of the multivariable model was 0.714 (0.619–0.809).Conclusions: A cephalhematoma size cutoff value of 113.5 cm3, as measured in the preoperative CT imaging, can predict intraoperative blood loss exceeding 30% of the total body blood volume. The establishment of a transfusion strategy prior to surgery based on cephalhematoma size could be useful in pediatric cranioplasty.

Published
2021

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