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Seungwan Woo, Geunhwan Ryu, Taesoo Kim, Namgi Hong, Jae-Hoon Han, Rafael Jumar Chu, Jinho Bae, Jihyun Kim, In-Hwan Lee, Deahwan Jung and Won Jun Choi
We demonstrate, for the first time, GaAs thin film solar cells epitaxially grown on a Si substrate using a metal wafer bonding and epitaxial lift-off process. A relatively thin 2.1 µm GaAs buffer layer was first grown on Si as a virtual substrate, and a ...
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Ji Hoon Seo, Ji Soo Kim, Jinho Yang, Hyunjun Yun, Minwoo Roh, Jung Woon Kim, Songhun Yu, Na Na Jeong, Hyun Woo Jeon, Joung Sook Choi and Jong Ryeul Sohn
The COVID-19 pandemic was caused by a highly contagious coronavirus that has triggered worldwide control actions such as social distancing and lockdowns. COVID-19 control actions have resulted in improved air quality locally and around the world in the s...
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Sang Hun Lee, Wonbin Lee, Jin Hee Hyun, Byeong Gwan Bhang, Jinho Choi and Hyung Keun Ahn
In this paper, a design technique for constructing a renewable-energy-based power system based on a customer?s power load is proposed. The proposed design technique adopts a second renewable energy power source in charge of the base load and is an improv...
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Jinho Kang, Jung Hoon Lee and Wan Choi
A two-stage precoder is widely considered in frequency division duplex massive multiple-input and multiple-output (MIMO) systems to resolve the channel feedback overhead problem. In massive MIMO systems, users on a network can be divided into several use...
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Jinho Choi, Eduardo Pereyra, Cem Sarica, Changhyup Park and Joe M. Kang
The reliable predictions of liquid holdup and pressure drop are essential for pipeline design in oil and gas industry. In this study, the drift-flux approach is utilized to calculate liquid holdups. This approach has been widely used in formulation of th...
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