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369 results on '"Han, Youn-Hee"'

2. Strangeness-driven Exploration in Multi-Agent Reinforcement Learning

Author

Kim, Ju-Bong, Choi, Ho-Bin, and Han, Youn-Hee

Subjects
Computer Science - Machine Learning, Computer Science - Artificial Intelligence, Computer Science - Multiagent Systems
Abstract

Efficient exploration strategy is one of essential issues in cooperative multi-agent reinforcement learning (MARL) algorithms requiring complex coordination. In this study, we introduce a new exploration method with the strangeness that can be easily incorporated into any centralized training and decentralized execution (CTDE)-based MARL algorithms. The strangeness refers to the degree of unfamiliarity of the observations that an agent visits. In order to give the observation strangeness a global perspective, it is also augmented with the the degree of unfamiliarity of the visited entire state. The exploration bonus is obtained from the strangeness and the proposed exploration method is not much affected by stochastic transitions commonly observed in MARL tasks. To prevent a high exploration bonus from making the MARL training insensitive to extrinsic rewards, we also propose a separate action-value function trained by both extrinsic reward and exploration bonus, on which a behavioral policy to generate transitions is designed based. It makes the CTDE-based MARL algorithms more stable when they are used with an exploration method. Through a comparative evaluation in didactic examples and the StarCraft Multi-Agent Challenge, we show that the proposed exploration method achieves significant performance improvement in the CTDE-based MARL algorithms., Comment: 9 pages, 7 figures

Published
2022

12. A Network-Based Seamless Handover Scheme with an L2 Extension Mechanism in VANET

Author

Choi, Ju-Ho, Cha, Jung-Hwan, Min, Sung-Gi, Han, Youn-Hee, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Coulson, Geoffrey, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin Sherman, Series editor, Stan, Mircea, Series editor, Xiaohua, Jia, Series editor, Zomaya, Albert Y., Series editor, Lee, Jong-Hyouk, editor, and Pack, Sangheon, editor

Published
2017
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30. Persistent Storage System for Efficient Management of OWL Web Ontology

Author

Jeong, Dongwon, Choi, Myounghoi, Jeon, Yang-Seung, Han, Youn-Hee, Yang, Laurence T., Jeong, Young-Sik, Han, Sung-Kook, 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, Indulska, Jadwiga, editor, Ma, Jianhua, editor, Yang, Laurence T., editor, Ungerer, Theo, editor, and Cao, Jiannong, editor

Published
2007
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31. Performance Comparison of Sleep Mode Operations in IEEE 802.16e Terminals

Author

Han, Youn-Hee, Min, Sung-Gi, Jeong, Dongwon, 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, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Shi, Yong, editor, van Albada, Geert Dick, editor, Dongarra, Jack, editor, and Sloot, Peter M. A., editor

Published
2007
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32. An Approach to Reliable and Efficient Routing Scheme for TCP Performance Enhancement in Mobile IPv6 Networks

Author

Park, Byungjoo, Han, Youn-Hee, Latchman, Haniph, 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, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Stajano, Frank, editor, Kim, Hyoung Joong, editor, Chae, Jong-Suk, editor, and Kim, Seong-Dong, editor

Published
2007
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33. A Study on Optimal Fast Handover Scheme in Fast Handover for Mobile IPv6 (FMIPv6) Networks

Author

Park, Byungjoo, Han, Youn-Hee, Latchman, Haniph, 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, Rangan, C. Pandu, editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Stajano, Frank, editor, Kim, Hyoung Joong, editor, Chae, Jong-Suk, editor, and Kim, Seong-Dong, editor

Published
2007
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34. A Novel Memory-Oriented OWL Storage System

Author

Jeong, Dongwon, Choi, Myounghoi, Jeon, Yang-Seung, Han, Youn-Hee, Jeong, Young-Sik, Han, Sung-Kook, 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, Min, Geyong, editor, Di Martino, Beniamino, editor, Yang, Laurence T., editor, Guo, Minyi, editor, and Rünger, Gudula, editor

Published
2006
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35. A Comprehensive Study on Handover Performance of Hierarchical Mobile IPv6

Author

Han, Youn-Hee, Jeong, Dongwon, 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, Sha, Edwin, editor, Han, Sung-Kook, editor, Xu, Cheng-Zhong, editor, Kim, Moon-Hae, editor, Yang, Laurence T., editor, and Xiao, Bin, editor

Published
2006
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36. Semi-soft FMIPv6 for 802.11 Network

Author

Choi, Hyon-Young, Min, Sung-Gi, Han, Youn-Hee, Jang, Hee-Jin, 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, Sha, Edwin, editor, Han, Sung-Kook, editor, Xu, Cheng-Zhong, editor, Kim, Moon-Hae, editor, Yang, Laurence T., editor, and Xiao, Bin, editor

Published
2006
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38. Fast Handover Method for mSCTP Using FMIPv6

Author

Kim, Kwang-Ryoul, Min, Sung-Gi, Han, Youn-Hee, 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, Jia, Xiaohua, editor, Wu, Jie, editor, and He, Yanxiang, editor

Published
2005
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39. Analysis of Movement Detection Process for IPv6 Mobile Nodes

Author

Han, Youn-Hee, Hwang, Seung-Hee, 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, Magedanz, Thomas, editor, Karmouch, Ahmed, editor, Pierre, Samuel, editor, and Venieris, Iakovos, editor

Published
2005
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40. The Impacts of Signaling Time on the Performance of Fast Handovers for MIPv6

Author

Hwang, Seung-Hee, Han, Youn-Hee, Han, Jung-Hoon, Hwang, Chong-Sun, 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, Niemegeers, Ignas, editor, and de Groot, Sonia Heemstra, editor

Published
2004
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