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XR 콘텐츠 UI/UX 평가를 위한 VR 스마트 팩토리 교육훈련 콘텐츠 제작
이영우(YoungWoo Lee),임익수(EekSu Leem),이수민(Su Min LEE),김현식(Hyun Sik Kim),강민구(Mingoo Kang),이창교(Chang-kyo Lee),서정욱(Jeongwook Seo) 한국정보통신학회 2021 한국정보통신학회 종합학술대회 논문집 Vol.25 No.2
이 논문에서는 제조 분야에 디지털 트윈 기반 XR 콘텐츠의 UX/UI 디자인 및 사용성 평가를 위하여 범용적인 콘텐츠 소프트웨어와 달리, HDM의 의존성이 큰 XR 콘텐츠의 특성을 반영하기 위해, 공정수행작업 시나리오에 맞춘 XR 콘텐츠를 제작하였다. XR 콘텐츠의 공정수행 작업 시나리오를 수행하기 위해 Qculus Quest2라는 HMD장비를 사용하였으며, 콘텐츠 제작은 Unity 엔진[1]과 SteamVR Plugin을 통해 제작되었다. In this paper, VR smart factory XR content tailored to process execution scenarios was produced to reflect the characteristics of XR content, which is highly dependent on HDM, unlike general-purpose content software for UX/UI design and usability evaluation of digital twin-based XR content in manufacturing. HMD equipment called Qculus Quest2 was used to perform the process execution task scenario for XR content, and content production was made through Unity Engine and Steam VR Plugin.
Joonghak Lee(Joonghak Lee),Youngwoo Kim(Youngwoo Kim),Jisang Kang(Jisang Kang) The International Academy of Global Business and T 2023 The International Academy of Global Business and T Vol.19 No.1
Purpose - Digital transformation is the key to success for recent multinational corporates. Ample studies have paid attention to the effectiveness of digital transformation and usage of advanced technology, but there is a lack of research related to how to prepare for digital transformation. The main purpose of this study is to organize specific case of preparation for digital transformation from a management perspective. In addition, the empirical results are presented to examine the impact of the preparation of the digital transformation. Design/Methodology/Approach - The study first reviews previous literature about digital transformation to organize antecedents, theory, contingency, and outcomes. Second, based on the resource-based view, a case is explained the company’s context, processes, and methodology. Lastly, empirical analysis is conducted to investigate how effective the digital transformation is prepared, and results are presented with data from 50 affiliations and 1,059 employees. Findings - This study finds the key to successful digital transformation is well-prepared talent, and suggests how multinational corporates can be ready for talent selection and development. Furthermore, readiness in digital transformation in talent varies by industry, company, and employee characteristics. Then, the study implies successful digital transformation should consider a contingency. Research Implications - The current study expands the knowledge on digital transformation by suggesting an actual case of South Korean multinational corporations, which allows researchers and practitioners to understand the process and methodology. Second, this research extended the discussion of digital transformation to talent selection preparation since previous literature has focused only on recent technology. Lastly, the study introduces the empirical results of preparation for digital transformation and helps practitioners initiate digital transformation in their organizations.
Younghwa Lee,Sukki Yoon,Youngwoo Lee,Marla B. Royne 글로벌지식마케팅경영학회 2016 Global Marketing Conference Vol.2016 No.7
We study liberals and conservatives in the United States and Korea to see how they respond to charity advertising that appeals to either equality or proportionality. The findings robustly demonstrate that in both countries, liberals respond more favorably to equality appeals, but conservatives respond more favorably to proportionality appeals. Study 1, conducted in the United States, finds that liberals find equality appeals more effective, but conservatives find proportionality appeals more effective. Study 2, conducted in Korea, shows that liberals (conservatives) estimate that they are more (less) likely to receive rewards for donating when charity advertising uses equality rather than proportionality appeals.
Lee, Seunghyup,Lee, Junghan,Park, Jinjoo,Choi, Youngwoo,Yong, Kijung WILEY‐VCH Verlag 2012 ADVANCED MATERIALS Vol.24 No.18
<P><B>The resistive switching (RS) characteristics of a tungsten oxide (WO<SUB>x</SUB>)‐Au core‐shell nanowire device array</B> is demonstrated for the first time. In addition to the stable bipolar RS characteristics, the nanowire structure of our RS devices provides superhydrophobic properties. The superhydrophobic RS nanowires repelled water that was poured over, such that the device was protected from failure by water contact‐driven leakage currents. Moreover, surprisingly, the devices still work even with when the device is submerged underwater.</P>
<tex> $W$</tex>-Band Multichannel FMCW Radar Sensor With Switching-TX Antennas
Lee, Seokchul,Joo, Joungmyoung,Choi, Junhyeok,Kim, Wansik,Kwon, Hosang,Lee, Sangho,Kwon, Youngwoo,Jeong, Jinho IEEE 2016 IEEE SENSORS JOURNAL Vol.16 No.14
<P>In this paper, a multichannel frequency-modulated continuous wave (FMCW) radar sensor with switching-transmit (TX) antennas is developed at W-band. To achieve a high angular resolution, a uniform linear array consisting of 5 switching-TX and 12 receive (RX) antennas is employed with the digital beamforming technique. The overall radar front-end module comprises a W-band transceiver and TX/RX antennas. A multichannel transceiver module consists of 5 up-conversion and 12 down-conversion channels, where one of the TX channels is sequentially switched ON. The developed radar sensor generates multiple digital beams with high gain, low side lobe level, and narrow beamwidth. The design of each component in the radar module is described with the measurement results. The assembled FMCW radar sensor exhibits a measured angular resolution of less than 2 degrees, and a field of view of approximately 60 degrees.</P>
Simple Field Weakening Control for Permanent Magnet Stepper Motors without DQ Transformation
Youngwoo Lee,Wonhee Kim,Donghoon Shin,Chung Choo Chung 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
In this paper, a simple field weakening control (FWC) without direct quadrature (DQ) transformation is proposed for position tracking of permanent magnet stepper motors (PMSMs). The proposed method consists of the PID controller for a torque modulation and a commutation scheme to achieve FWC without DQ transformation. In proposed commutation scheme, the desired negative direct current is designed to cancel the back-emf so that the required inputs can decreased. The commutation scheme is equivalent to microstepping where currents have time-varying amplitude over 0.5π electrical phase advance. For simple implementation, proportional integral (PI) current feedback was used to guarantee the desired current. Simulation results validate the performance of the proposed method.