Young-Woo Choi

Korea Institute of Energy Research

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Tie Liu

Shanghai Astronomical Observatory

James Di Francesco

Herzberg Institute of Astrophysics

Sarah Graves

University of Hawaii at Hilo

F D Priestley

Cardiff University

Chuan-Peng Zhang

National Astronomical Observatories

A. P. Whitworth

Cardiff University

Miju Kang

Korea Astronomy and Space Science Institute

Sheng‐Yuan Liu

Institute of Astronomy and Astrophysics, Academia Sinica

Hongchi Wang

Purple Mountain Observatory

Pierre Bastien

Université de Montréal

Cooperative Institutions

Korea Astronomy and Space Science Institute

National Astronomical Observatory of Japan

Chinese Academy of Sciences

Seoul National University

Max Planck Society

Korea University of Science and Technology

Institute of Astronomy and Astrophysics, Academia Sinica

Yonsei University

Korea Advanced Institute of Science and Technology

Center for Astrophysics Harvard & Smithsonian

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Cellulose Nanocrystals Incorporated Poly(arylene piperidinium) Anion Exchange Mixed Matrix Membranes

Membrane Journal (2024)

Da Hye Sim Young Park Young-Woo Choi Jung Tae Park Jae Hun Lee

Arylene

Matrix (chemical analysis)

10.14579/membrane_journal.2024.34.2.154

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MAC Layer Hurdles in BSNs

arXiv (Cornell University) (2009)

Sana Ullah Pervez Khan Young-Woo Choi Hyung-Soo Lee Kyung Sup Kwak

The last few decades have seen considerable research progress in microelectronics and integrated circuits, system-on-chip design, wireless communication, and sensor technology. This progress has enabled the seamless integration of autonomous wireless sensor nodes around a human body to create a Body Sensor Network (BSN). The development of a proactive and ambulatory BSN induces a number of enormous issues and challenges. This paper presents the technical hurdles during the design and implementation of a low-power Medium Access Control (MAC) protocol for in-body and on-body sensor networks. We analyze the performance of IEEE 802.15.4 protocol for the on-body sensor network. We also provide a comprehensive insight into the heterogeneous characteristics of the in-body sensor network. A low-power technique called Pattern-Based Wake-up Table is proposed to handle the normal traffic in a BSN. The proposed technique provides a reliable solution towards low-power communication in the in-body sensor network.

10.48550/arxiv.0911.1507

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Autocrine function of eosinophil extracellular dna traps in asthma

Young-Woo Choi

10.26226/morressier.5acdc65fd462b8029238dc6a

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The JCMT BISTRO Survey: A Spiral Magnetic Field in a Hub-filament Structure, Monoceros R2

The Astrophysical Journal (2022)

Jihye Hwang Jongsoo Kim Kate Pattle Chang Won Lee Patrick M. Koch

We present and analyze observations of polarized dust emission at 850 $\mu$m towards the central 1 pc $\times$ 1 pc hub-filament structure of Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on the James Clerk Maxwell Telescope (JCMT) as part of the BISTRO (B-fields in Star-forming Region Observations) survey. The orientations of the magnetic field follow the spiral structure of Mon R2, which are well-described by an axisymmetric magnetic field model. We estimate the turbulent component of the magnetic field using the angle difference between our observations and the best-fit model of the underlying large-scale mean magnetic field. This estimate is used to calculate the magnetic field strength using the Davis-Chandrasekhar-Fermi method, for which we also obtain the distribution of volume density and velocity dispersion using a column density map derived from $Herschel$ data and the C$^{18}$O ($J$ = 3-2) data taken with HARP on the JCMT, respectively. We make maps of magnetic field strengths and mass-to-flux ratios, finding that magnetic field strengths vary from 0.02 to 3.64 mG with a mean value of 1.0 $\pm$ 0.06 mG, and the mean critical mass-to-flux ratio is 0.47 $\pm$ 0.02. Additionally, the mean Alfv\'en Mach number is 0.35 $\pm$ 0.01. This suggests that in Mon R2, magnetic fields provide resistance against large-scale gravitational collapse, and magnetic pressure exceeds turbulent pressure. We also investigate the properties of each filament in Mon R2. Most of the filaments are aligned along the magnetic field direction and are magnetically sub-critical.

10.3847/1538-4357/ac99e0

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Large‐Area Uniform 1‐nm‐Level Amorphous Carbon Layers from 3D Conformal Polymer Brushes. A “Next‐Generation” Cu Diffusion Barrier? (Adv. Mater. 15/2022)

Advanced Materials (2022)

Yun‐Ho Kang Sang‐Bong Lee Young-Woo Choi Won Kyung Seong Kyu Hyo Han

Conformal Amorphous Carbon Ultrathin Cu diffusion barriers with high conformality have gained great attention for next-generation ultrahigh-density semiconductor device miniaturization. In article number 2110454, Sun Hwa Lee, Rodney S. Ruoff, Ki-Bum Kim, Sang Ouk Kim, and co-workers introduce a handy and reliable method for the preparation of conformal amorphous carbon (a-C) barrier layers with nanometer-level thickness. A polystyrene brush layer is grafted onto a 3D copper structure with self-limiting chemistry, and subsequent carbonization yields large-area uniform 1 nm-level a-C layers with excellent Cu blocking performance.

Polystyrene

Carbon fibers

Diffusion barrier

Conformal coating

Nanometre

10.1002/adma.202270113

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Travel Behavior Analysis using Origin-Destination Data for the Subway Line No.7

KIBIM Magazine (2019)

sangcheonhan Kyoung Cheul Lee KIm Hwanyong Young-Woo Choi

Line (geometry)

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Resource Management in SS/TDMA systems for Heterogeneous Traffic Classes

Young-Woo Choi Se Hoon Kim

Resource Management

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게임에서의 협력과 호혜성 메커니즘 연구 – ‘월드 오브 워크래프트: 클래식’을 중심으로

Young-Woo Choi SeoungHo Ryu

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Key words research of players’ experience and presence in FPS genrefocusing on game play time and Steam reviews

Journal of Korea Game Society (2021)

Young-Woo Choi SeoungHo Ryu

본 논문은 스팀(Steam)의 리뷰 데이터를 활용하여 게임이용시간에 따른 FPS에서의 사용자 현존감 경험과 플레이어 경험을 분석했다. Python을 활용하여 크롤링을 통해 데이터를 얻었다. 분석 결과 게임 이용 시간이 적은 집단에서는 통제 가능한 물리적 현존감과 통제 불가능한 사회적 현존감에 관한 이슈가 나왔고 게임이용시간이 많은 집단에서는 이전 집단에 있던 물리적 현존감 요인이 통제 가능한 사회적 현존감으로 변화한 것을 알 수 있었다. 더 나아가 플레이어 경험 분석을 통해 게임 플레이 요인인 “반동(recoil)”이란 키워드가 중요하다는 것을 알 수 있었다.

Python

10.7583/jkgs.2021.21.6.13

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MAC Layer Hurdles in BSNs

arXiv (Cornell University) (2009)

Sana Ullah Pervez Khan Young-Woo Choi Hyung-Soo Lee Kyung Sup Kwak

Media access control

Microelectronics

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