Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Hong Soo Park"'
Publikováno v:
IEEE Access, Vol 12, Pp 86631-86638 (2024)
There has been growing interest in the field of wireless power transfer (WPT), especially for a high-power (Watt-level) application. Rectifiers are essential components for WPT, as they convert incoming RF into DC power. However, conventional Schottk
Externí odkaz:
https://doaj.org/article/06b823ba47ba48169ede1e094730a5bf
Autor:
Hong Soo Park, Sun K. Hong
Publikováno v:
IEEE Access, Vol 11, Pp 102917-102925 (2023)
We introduce an encryption device based on a compact wave-chaotic cavity to enhance the physical security of wireless communication. The proposed encryption device is composed of a compact quasi-2D disordered cavity, where transmit signals pass throu
Externí odkaz:
https://doaj.org/article/31015609b9794f9a80baa8a943446b28
Publikováno v:
The Astrophysical Journal, Vol 964, Iss 2, p 186 (2024)
We present the discovery of a peculiar dwarf nova KSP-OT-201712a using high-cadence, multicolor observations made with the Korea Microlensing Telescope Network. KSP-OT-201712a exhibits a rare presence of outbursts during standstills, as well as stron
Externí odkaz:
https://doaj.org/article/f73fa3a318c044d2abf5fe4e26b0d3e4
Autor:
Kanghyeok Lee, Ha Young Hong, Wonwoo Lee, Semin Jo, Hong Soo Park, Junhyuk Yang, Changkun Park, Hojin Lee, Sun K. Hong
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-8 (2022)
Abstract A broadband metasurface flat lens is proposed as a polarization-independent wideband superstrate for wave focusing and gain enhancement at Ka-band. The proposed metasurface structure consists of four metal layers and is designed with diagona
Externí odkaz:
https://doaj.org/article/7311751556ba49bda6846358463dad21
Publikováno v:
Journal of Electromagnetic Engineering and Science, Vol 22, Iss 3, Pp 361-366 (2022)
This paper presents a novel wideband directive self-complementary bowtie antenna (SCBA) designed for Ka-band. The proposed antenna is well suited for wireless power transfer and energy harvesting of compact devices using 5G frequencies. The proposed
Externí odkaz:
https://doaj.org/article/78c45cb9f7da4cae93c15795074f3459
Autor:
Hong Soo Park, Sun K. Hong
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
Abstract For far-field wireless power transfer (WPT) in a complex propagation environment, a time-reversal (TR) based WPT that can overcome the drawbacks of conventional beamforming (BF) by taking advantage of multipath has been recently proposed. Ho
Externí odkaz:
https://doaj.org/article/294f9408b60345a4997d2c2946f0f831
Autor:
Wonwoo Lee, Semin Jo, Kanghyeok Lee, Hong Soo Park, Junhyuk Yang, Ha Young Hong, Changkun Park, Sun K. Hong, Hojin Lee
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
Abstract Metasurfaces allow the rapid development of compact and flat electromagnetic devices owing to their capability in manipulating the wavefront of electromagnetic waves. Particularly, with respect to the metasurface lenses, wide operational ban
Externí odkaz:
https://doaj.org/article/67f7a476efe9450c8ee7d675af41a490
Autor:
Hong Soo Park, Sun K. Hong
Publikováno v:
IEEE Access, Vol 8, Pp 66517-66528 (2020)
The performance of time-reversal (TR) based far-field wireless power transfer (WPT) from an antenna array in a complex propagation environment is investigated in comparison with conventional array-based beamforming (BF). A two-step experiment is perf
Externí odkaz:
https://doaj.org/article/ec0c62496a6f4cd1ae3314f0642e3cd9
Autor:
Yuan Qi Ni, Dae-Sik Moon, Maria R. Drout, Christopher D. Matzner, Kelvin C. C. Leong, Sang Chul Kim, Hong Soo Park, Youngdae Lee
Publikováno v:
The Astrophysical Journal, Vol 959, Iss 2, p 132 (2023)
SN 2021aefx is a normal Type Ia supernova (SN) showing excess emission and redward color evolution over the first ∼ 2 days. We present analyses of this SN using our high-cadence KMTNet multiband photometry, spectroscopy, and publicly available data
Externí odkaz:
https://doaj.org/article/c4cc8e5c4a614664b7454233ddee6caa
Autor:
Yuan Qi Ni, Dae-Sik Moon, Maria R. Drout, Abigail Polin, David J. Sand, Santiago González-Gaitán, Sang Chul Kim, Youngdae Lee, Hong Soo Park, D. Andrew Howell, Peter E. Nugent, Anthony L. Piro, Peter J. Brown, Lluís Galbany, Jamison Burke, Daichi Hiramatsu, Griffin Hosseinzadeh, Stefano Valenti, Niloufar Afsariardchi, Jennifer E. Andrews, John Antoniadis, Rachael L. Beaton, K. Azalee Bostroem, Raymond G. Carlberg, S. Bradley Cenko, Sang-Mok Cha, Yize Dong, Avishay Gal-Yam, Joshua Haislip, Thomas W.-S. Holoien, Sean D. Johnson, Vladimir Kouprianov, Yongseok Lee, Christopher D. Matzner, Nidia Morrell, Curtis McCully, Giuliano Pignata, Daniel E. Reichart, Jeffrey Rich, Stuart D. Ryder, Nathan Smith, Samuel Wyatt, Sheng Yang
Publikováno v:
The Astrophysical Journal, Vol 946, Iss 1, p 7 (2023)
SN 2018aoz is a Type Ia SN with a B -band plateau and excess emission in infant-phase light curves ≲1 day after the first light, evidencing an over-density of surface iron-peak elements as shown in our previous study. Here, we advance the constrain
Externí odkaz:
https://doaj.org/article/f312e0528ffd405e8ccd5e88468cd366