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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.
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.
<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>
Lee, Youngwoo,Shin, Donghoon,Kim, Wonhee,Chung, Chung Choo IEEE 2017 IEEE/ASME transactions on mechatronics Vol.22 No.3
<P>We have designed a nonlinear H-2 controller for permanent magnet stepper motors. The proposed method consists of a new torque modulation scheme, a passive nonlinear observer, and a nonlinear H-2 controller. The nonlinear torque modulation is incorporated to generate desired torque. The H-2 controller and a passive nonlinear observer are independently designed. The use of the passive nonlinear observer allows operation based on only angular position without requiring an additional sensor. The nonlinear H-2 controller is developed to improve transient response in the position control. Tracking performance is evaluated in the view point of a linear system. The control gains are linearly scheduled by using interpolation parameters based on a linear matrix inequality approach. A stability of the passive nonlinear observer is proven by using a passivity theorem. The proposed method improves transient response in position tracking and allows evaluation of performance criteria. The performance of the proposed method was validated by means of experimental comparison with a previous method.</P>
Youngwoo Nam,Jung-Su Lee,Sang-Hyun Koh,Tae Su Kim,Sang-Gil Lee,Dae-Sung Won,Jong-Kuk Kim,Won Il Choi 한국응용곤충학회 2011 한국응용곤충학회 학술대회논문집 Vol.2011 No.05
Spatio-temporal distribution pattern of an ambrosia beetle, Platypus koryoensis (Murayama) which is vector of Raffaeleaquerci-mongolicae K.H. Kim et al, a causative agent for Korean oak wilt (KOW) was examined in the stand level. Spatial distribution of P. koryoensiswas influenced by their density. Relationship between degree of aggregation and density was positively correlated when the density was extremely low or high whereas the relationship was reverse when the density was intermediate. Patch of P. koryoensis formed around or near dead trees or partial dead trees, suggesting these trees indicated epicenter of P. koryoensis. Fraction of trees attacked by less than 100 individual of P. koryoensis in the stand per year increased abruptly whereas fraction of trees attacked over 1,000 individuals of P. koryoensis increased gradually. Our results showed that the dead trees would be an epicenter of P. koryoensis and the number of trees killed by the ambrosia beetle would be reduced by lowering total population of the ambrosia beetle around the epicenter.
Youngwoo Bryan Yoon,Minah Kim,Junhee Lee,Kang Ik K,Cho,Seoyeon Kwak,Tae Young Lee,Jun Soo Kwon 대한신경정신의학회 2019 PSYCHIATRY INVESTIGATION Vol.16 No.3
We aim to investigate the effect of fronto-temporal transcranial direct current stimulation (tDCS) on the interactions among functional networks and its association with psychotic symptoms. In this pilot study, we will determine possible candidate functional networks and an adequate sample size for future research. Seven schizophrenia patients with treatment-refractory auditory hallucinations underwent tDCS twice daily for 5 days. Resting-state fMRI data and measures of the severity of psychotic symptoms were acquired at baseline and after completion of the tDCS sessions. At baseline, decreased functional network interaction was negatively correlated with increased hallucinatory behavior. After tDCS, the previously reduced functional network connectivity significantly increased. Our results showed that fronto-temporal tDCS could possibly remediate aberrant hallucination-related functional network interactions in patients with schizophrenia.