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우울 수준에 따른 가상멀미 경험이 가상현실 기반 신경인지과제 수행에 미치는 영향 : 고령집단을 중심으로
김인하(Kim, Inha)박정훈(Park, Junghun),이서정(Lee, Seojung),민성(Min, Sung),전주영(Jeon, Juyoung),조건우(Cho, Geonwoo),박혜연(Park, Haeyean),박다솔(Park, Dasol)박수현(Park, Soohyun) 한국재활심리학회 2021 재활심리연구 Vol.28 No.1
본 연구는 고령 집단에서 가상현실기반 평가 및 치료를 활용하는데 있어, 주요 장애물이 될 수 있는 가상멀미의 영향을 탐색하기 위해 진행되었다. 이 가운데서도 신경인지과제 수행 시, 우울감의 수준에따라 가상멀미가 과제수행에 미치는 영향을 탐색하고자 하였으며, 이를 확인하기 위하여 만 50세 이상성인 73명이 (1) 가상현실 기반 신경인지과제, (2) 가상멀미 수준과 우울을 측정하는 자기보고식 설문을 완료하였다. 연구 결과, 우울감이 클수록 가상현실 프로그램 시행에 따른 가상멀미 변화량이 커지는 경향을 보이며, 준임상 수준 이상에 해당하는 고우울 집단에서는 가상멀미가 가상현실기반 신경인지과제 수행에 유의한 영향을 미치는 것으로 나타났다. 저우울 집단에서는 이러한 영향이 유의하지 않았다. 이를 통해 준임상수준 이상의 고우울 집단에서는 지각된 가상멀미 수준이 가상현실기반 신경인지과제 수행에 부정적 영향을 미칠 수 있음이 시사되었다. 이러한 결과는 향후 고령의 우울집단에서 가상현실 치료를 활성화하기 위해, 주요 부작용인 가상멀미의 영향을 확인했다는 점에서 의의가 있으며, 이를 비롯한 본 연구의 의의와 한계점 및 후속 연구에 대해 논의하였다. This study was conducted to explore the effects of simulator sickness, which can be a major obstacle in the use of virtual reality-based evaluation and treatment in the elderly group. Also, the effect of depression level on simulator sickness and a virtual reality (VR)-based neurocognitive task performance was investigated. Seventy-three participants over the age of 50 years completed the (1) VR-based neurocognitive task and (2) self-report questionnaires measuring simulator sickness, and depressive symptoms. The results indicated that depression predicts the severity of perceived simulator sickness, and simulator sickness had a significant effect on the performance of the virtual reality-based neurocognitive task in a group with sub-clinical or clinical levels of depression. Based on the results, the implications, limitations and suggestions for future studies were discussed.
Hydrogen Plasma-Assisted Atomic Layer Deposition of Ru with Low Oxygen Content
Park Geonwoo,Kim Keunhoi,Shin Jeong Woo,한건구,고도현,안지환 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.4
Ru is extensively used in electrical and energy applications because of its high electrical conductivity and catalytic activity. This study reports the H 2 plasma-enhanced atomic layer deposition (PEALD) of Ru thin fi lms using a novel carbonyl cyclohexadiene ruthenium precursor. The optimized process conditions for depositing Ru thin fi lms by PEALD were established based on the growth per cycle (GPC), chemical formation, crystallinity, conformality, and resistivity, according to process parameters such as precursor pulse time, H 2 plasma pulse time, purge time, and deposition temperature. Pure Ru thin fi lms (low carbon and oxygen) were deposited with low resistivity (30.8 μΩ cm) and showed high conformality (> 95%) on the Si trenches. The oxidant-free PEALD Ru process reported in this study may have implications on the fabrication of high-quality interfaces between Ru and easily-oxidized substrates.
An Empirical Study on the Firefighting Industries’ Global Expansion Policies
Geonwoo Park 위기관리 이론과 실천 2020 Journal of Safety and Crisis Management Vol.10 No.6
This study aims to empirically investigate the determinants of overseas expansion of firefighting industry in South Korea. For the government, it is important to make this industry and its companies developed by supporting a various strategies. Among them, supporting overseas expansion is one of the major policies for firefighting industry. However, there have been few studies about this issue. Considering the increasing importance of firefighting industry around the globe, it is necessary to find implications on how to support business in this field. In other words, it is significant to find proper policy support for these people. For the empirical investigation, this study uses logit model and the result shows that the size of the business, R&D, industrial property rights, government support, and the production of firefighting goods were found to be statistically significant for overseas advancement. These results indicate that this study can be used as a useful example to formulate and implement government policy.