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440 results on '"Park, Hyeyoung"'

8. LAG-3xPD-L1 bispecific antibody potentiates antitumor responses of T cells through dendritic cell activation

Author

Sung, Eunsil, Ko, Minkyung, Won, Ju-young, Jo, Yunju, Park, Eunyoung, Kim, Hyunjoo, Choi, Eunji, Jung, Ui-jung, Jeon, Jaehyoung, Kim, Youngkwang, Ahn, Hyejin, Choi, Da-som, Choi, Seunghyun, Hong, Youngeun, Park, Hyeyoung, Lee, Hanbyul, Son, Yong-Gyu, Park, Kyeongsu, Won, Jonghwa, Oh, Soo Jin, Lee, Seonmin, Kim, Kyu-pyo, Yoo, Changhoon, Song, Hyun Kyu, Jin, Hyung-seung, Jung, Jaeho, and Park, Yoon

Published
2022
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11. STSPhys: Enhanced Remote Heart Rate Measurement With Spatial-Temporal SwiftFormer

Author

Kim, Hyunduk, Lee, Sang-Heon, Sohn, Myoung-Kyu, Kim, Jungkwang, and Park, Hyeyoung

Abstract

Estimating heart activities and physiological signals from facial video without any contact, known as remote photoplethysmography and remote heart rate estimation, holds significant potential for numerous applications. In this letter, we present a novel approach for remote heart rate measurement leveraging a Spatial-Temporal SwiftFormer architecture (STSPhys). Our model addresses the limitations of existing methods that rely heavily on 3D CNNs or 3D visual transformers, which often suffer from increased parameters and potential instability during training. By integrating both spatial and temporal information from facial video data, STSPhys achieves robust and accurate heart rate estimation. Additionally, we introduce a hybrid loss function that integrates constraints from both the time and frequency domains, further enhancing the model's accuracy. Experimental results demonstrate that STSPhys significantly outperforms existing state-of-the-art methods on intra-dataset and cross-dataset tests, achieving superior performance with fewer parameters and lower computational complexity.

Published
2025
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24. On-Line Learning Theory of Soft Committee Machines with Correlated Hidden Units - Steepest Gradient Descent and Natural Gradient Descent -

Author

Inoue, Masato, Park, Hyeyoung, and Okada, Masato

Subjects
Condensed Matter - Disordered Systems and Neural Networks, Condensed Matter - Statistical Mechanics
Abstract

The permutation symmetry of the hidden units in multilayer perceptrons causes the saddle structure and plateaus of the learning dynamics in gradient learning methods. The correlation of the weight vectors of hidden units in a teacher network is thought to affect this saddle structure, resulting in a prolonged learning time, but this mechanism is still unclear. In this paper, we discuss it with regard to soft committee machines and on-line learning using statistical mechanics. Conventional gradient descent needs more time to break the symmetry as the correlation of the teacher weight vectors rises. On the other hand, no plateaus occur with natural gradient descent regardless of the correlation for the limit of a low learning rate. Analytical results support these dynamics around the saddle point., Comment: 7 pages, 6 figures

Published
2002
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40. Facial Image Analysis Using Subspace Segregation Based on Class Information

Author

Cho, Minkook, Park, Hyeyoung, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Lu, Bao-Liang, editor, Zhang, Liqing, editor, and Kwok, James, editor

Published
2011
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41. A Robust Face Recognition through Statistical Learning of Local Features

Author

Seo, Jeongin, Park, Hyeyoung, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Nierstrasz, Oscar, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Sudan, Madhu, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Vardi, Moshe Y., Series editor, Weikum, Gerhard, Series editor, Lu, Bao-Liang, editor, Zhang, Liqing, editor, and Kwok, James, editor

Published
2011
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45. The Use of Metaverse in Nursing Education

Author

De Gagne, Jennie C., primary, Randall, Paige S., additional, Rushton, Sharron, additional, Park, Hyeyoung K., additional, Cho, Eunji, additional, Yamane, Sandra S., additional, and Jung, Dukyoo, additional

Published
2022
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47. An Efficient Face Recognition through Combining Local Features and Statistical Feature Extraction

Author

Kim, Donghyun, Park, Hyeyoung, Hutchison, David, Kanade, Takeo, Kittler, Josef, Kleinberg, Jon M., Mattern, Friedemann, Mitchell, John C., Naor, Moni, Nierstrasz, Oscar, Pandu Rangan, C., Steffen, Bernhard, Sudan, Madhu, Terzopoulos, Demetri, Tygar, Doug, Vardi, Moshe Y., Weikum, Gerhard, Goebel, Randy, Siekmann, Jörg, Wahlster, Wolfgang, Zhang, Byoung-Tak, editor, and Orgun, Mehmet A., editor

Published
2010
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49. A Robust Keypoints Matching Strategy for SIFT: An Application to Face Recognition

Author

Cho, Minkook, Park, Hyeyoung, 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, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Leung, Chi Sing, editor, Lee, Minho, editor, and Chan, Jonathan H., editor

Published
2009
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