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48 results on '"Jeong, Jae-Yun"'

8. Adaptive GOP Bit Allocation to Provide Seamless Video Streaming in Vertical Handoff

Author

Duong, Dinh Trieu, Kim, Hye-Soo, Ha, Le Thanh, Jeong, Jae-Yun, Ko, Sung-Jea, 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, Chang, Long-Wen, editor, and Lie, Wen-Nung, editor

Published
2006
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9. Power-Aware Rate Control for Mobile Multimedia Communications

Author

Kim, Hye-Soo, Duong, Dinh Trieu, Jeong, Jae-Yun, Dan, Byoung-Kyu, Ko, Sung-Jea, 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, Kunz, Thomas, editor, and Ravi, S. S., editor

Published
2006
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10. Hill-Sachs Deformity

Author

Jeong, Jae Yun, primary, Stead, Thor, additional, Kwon, Jenna, additional, Carman, Matthew, additional, and Ganti, Latha, additional

Published
2022
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12. D Projects in South Korea

Author

Lee, Ji Yeon, Kumari, Richa, Jeong, Jae Yun, Kim, Tae-Hyun, and Lee, Byeong-Hee

Subjects
association rules, project management, topic modeling, green new deal policy, National Science and Technology Information Service
Abstract

This paper reviews the development of South Korea&rsquo, s national research and development (R&amp, D) in graphene technology, focusing on projects that have been classified as &ldquo, green&rdquo, technology. A total of 826 projects (USD 210 billion) from 2010 to 2019 were collected from the National Science and Technology Information Service (NTIS), which is full-cycle national R&amp, D project management system in South Korea. Then we analyzed its R&amp, D trend by conducting diverse text mining methods including frequency analysis, association rule mining, and topic modeling. The analysis suggests that the number of graphene green technology (GT) R&amp, D projects and the research expenses will show a rising curve again in the incumbent government along with the implementation of the Korean New Deal policy, which integrates the Green New Deal and the Digital New Deal.

Published
2020
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26. Measurement based channel-adaptive video streaming for mobile devices over mobile WiMAX

Author

Kim, Hye-Soo, Nam, Hyeong-Min, Jeong, Jae-Yun, Kim, Soo-Hyung, and Ko, Sung-Jea

Subjects
Streaming media -- Analysis, Wi-Max -- Usage, Wi-Max -- Analysis, Streaming media technology, Business, Electronics and electrical industries, Engineering and manufacturing industries
Abstract

The channel bandwidth variation and the disconnection during handoff are the most critical problems which degrade the video quality in wireless video streaming. To cope with these problems, we propose an efficient video streaming method in this paper, which does not only dynamically adjust the video transmission rate based on the channel bandwidth, but also minimize the error propagation during handoff. Firstly, the channel bandwidth of the mobile worldwide interoperability for microwave access, called WiMAX, is estimated by analyzing channel parameters including the carrier to interference and noise ratio (CINR) and the handoff is detected by using the handoff occurrence message (HOM). Secondly, the streaming server adjusts the next transmission rate according to the estimated channel bandwidth to avoid the network congestion and performs the intra refresh method that inserts an intra frame (1-frame) right after handoff by using the HOM to reduce the error propagation effectively. Experimental results indicate that the proposed method can improve the performance of the video streaming over mobile WiMAX. Index Terms--Wireless video streaming, channel-adaptive, handoff, mobile WiMAX.

Published
2008

27. Topic modelling and social network analysis of publications and patents in humanoid robot technology.

Author

Kumari, Richa, Jeong, Jae Yun, Lee, Byeong-Hee, Choi, Kwang-Nam, and Choi, Kiseok

Subjects
*SOCIAL network analysis, *HUMANOID robots, *KEYWORDS, *PATENTS, *SOCIAL networks, *DATA analysis
Abstract

This article presents analysis of data from scientific articles and patents to identify the evolving trends and underlying topics in research on humanoid robots. We used topic modelling based on latent Dirichlet allocation analysis to identify underlying topics in sub-areas in the field. We also used social network analysis to measure the centrality indices of publication keywords to detect important and influential sub-areas and used co-occurrence analysis of keywords to visualise relationships among subfields. The research result is useful to identify evolving topics and areas of current focus in the field of humanoid technology. The results contribute to identify valuable research patterns from publications and to increase understanding of the hidden knowledge themes that are revealed by patents. [ABSTRACT FROM AUTHOR]

Published
2021
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30. The Korean War in European Social Studies Textbooks

Author

Jeong Jae Yun

Subjects
Cultural Studies, media_common.quotation_subject, General Social Sciences, Face (sociological concept), Social studies, Politics, Arts and Humanities (miscellaneous), State (polity), Western europe, Political science, Law, Cold war, Economic history, Mainstream, Ideology, media_common
Abstract

This paper examines how European social studies textbooks deal with the Korean War. The Korean War is not only a major Korean topic covered in foreign textbooks, but it is also an important historical event for European countries as tensions rose in the face of the entrenchment of the Cold War. This paper divides Europe into three regions: Western Europe, Eastern Europe, and other European countries. The analysis shows that instead of three different views on the Korean War based upon region, each country has a different emphasis and way of narrating. Textbooks are an important medium in which official ideology and politics are reflected. Even if various perspectives on the Korean War exist, the mainstream view of each country, which is expressed in the textbooks, reflects the knowledge approved by the state.

Published
2009

46. Power-Aware Rate Control for Mobile Multimedia Communications.

Author

Kunz, Thomas, Ravi, S. S., Kim, Hye-Soo, Duong, Dinh Trieu, Jeong, Jae-Yun, Dan, Byoung-Kyu, and Ko, Sung-Jea

Abstract

Consumers increasingly demand high quality of service (QoS) for multimedia applications. Rate control scheme is one of the major methods that provide high video quality for mobile multimedia devices over wireless networks. This paper presents an efficient rate-control scheme which estimates the transmission power level of mobile devices, then adaptively adjusts the encoding bit rate according to the estimated power level to minimize overall distortion over sequences of video frames. Experimental results show that the proposed method can efficiently enhance the video quality and provide better peak signal to noise ratio (PSNR) performance than existing TMN8 rate control method. [ABSTRACT FROM AUTHOR]

Published
2006
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47. Sharpness Enhancement of Stereo Images Using Binocular Just-Noticeable Difference.

Author

Jung, Seung-Won, Jeong, Jae-Yun, and Ko, Sung-Jea

Subjects
*BINOCULAR vision, *ALGORITHMS, *LUMINANCE (Video), *MATHEMATICAL optimization, *IMAGE registration, *NOISE
Abstract

In this paper, we propose a new sharpness enhancement algorithm for stereo images. Although the stereo image and its applications are becoming increasingly prevalent, there has been very limited research on specialized image enhancement solutions for stereo images. Recently, a binocular just-noticeable-difference (BJND) model that describes the sensitivity of the human visual system to luminance changes in stereo images has been presented. We introduce a novel application of the BJND model for the sharpness enhancement of stereo images. To this end, an overenhancement problem in the sharpness enhancement of stereo images is newly addressed, and an efficient solution for reducing the overenhancement is proposed. The solution is found within an optimization framework with additional constraint terms to suppress the unnecessary increase in luminance values. In addition, the reliability of the BJND model is taken into account by estimating the accuracy of stereo matching. Experimental results demonstrate that the proposed algorithm can provide sharpness-enhanced stereo images without producing excessive distortion. [ABSTRACT FROM AUTHOR]

Published
2012
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48. Network Analysis on Green Technology in National Research and Development Projects in Korea.

Author

Jeong, Jae Yun, Kang, Inje, Choi, Ki Seok, and Lee, Byeong-Hee

Abstract

This study examined how green technology (GT) has evolved recently in the domain of national research and development (R&D) in Korea. The analysis considered social network analysis by using keywords of national R&D projects in environmentally benign (‘green’ in this paper) technologies. Data for analysis were collected from the R&D database of the National Science and Technology Information Service (NTIS). By selecting the official GT category in the NTIS’s database, we gathered 53,896 GT R&D projects from 2011 to 2016 inclusive. By constructing a co-occurrence matrix with keywords, we conducted a centrality analysis (including degree, closeness, betweenness centrality) and visualized the network matrix to display a cluster map. This study presents the following findings: (1) the chronical trends of GT R&D, (2) focused fields of GT R&D, (3) the relations between keywords and GTs, and (4) the characteristics and problems in GT R&D. The paper ends with suggested policy implications to boost national GT R&D and to develop GTs in the future. [ABSTRACT FROM AUTHOR]

Published
2018
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