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오동훈,남궁문,박희순 한국ITS학회 2015 한국ITS학회논문지 Vol.14 No.5
본 연구는 차량운전의 주체인 인간이 실제 차량을 운전하면서 나타나게 되는 수많은 반응 중 생체정보인 뇌파를 측정 장비를 이용하여 도로주행 중 발생하는 뇌파를 수집하고 수집된 자료를 바탕으로 하여 실험횟수, 주행시간에 따른 변화, 도로 기하구조에 따른 변화 등 요인을 추출하고 분석을 실시하였다. 주행실험 중 발생한 뇌파 변화를 분석에 필요한 알파(α)파, 베타(β)파, 감마(γ)파의 형태로 1차 추출을 한 후, 실험 전 구간에서의 뇌파 발생 빈도와 변화율을 추출하고 실험 횟수에 증가에 따른 학습효과를 관찰하고자 회귀모형을 적용하여 뇌파 특성에 따른 빈도변화를 계산하였다. 그 결과, 실험 횟수에 따라 뇌파는 개인차에 의한 변화를 보였으며 이는 같은 구간을 반복적으로 주행함에 따라 운전자가 도로 기하구조와 신호, 안전시설 등을 기억함에 따라 익숙하고 편안하게 주행하고 있음을 확인할 수 있었다. In this study, human is the subject of driving a car, the actual EEG is a biological information in a number of reactions that are displayed while driving the vehicle by using a measuring device, occurs during travel of the road EEG to be collected, number of experiments the collected material on the basis of changes associated with running time, extracts the factors such as changes due to road geometry, and analysis was performed. The required changes in the EEG occurring during traveling experiment analysis alpha (α) waves, beta (β) wave, after the primary extraction in the form of gamma (γ) faction, the brain wave frequency of the entire period of the experiment change rate extracts, to calculate the change in frequency in response to EEG characteristics by applying the regression model to observe a learning effect in response to an increase in the number of experiments, as a result, depending on the number of experiments, EEG changes due to individual differences. The show, by repeatedly driving a section like this, it was possible to verify that comfortably travels driver accustomed in accordance with the stored road geometry and signal, safety facilities.
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한강변 아파트단지 내 조망 유무에 따른 동별 층별효용비율 비교분석
오동훈 한국부동산분석학회 2003 不動産學硏究 Vol.9 No.2
The purpose of this study is firstly to verify that the view and story which are environmental and/or amenity factors, have an effect on the price of Han-riverside apartments through the sales comparison approach, secondly to provide raw data in measuring real selling price of those apartments and thirdly to propose the necessity of adaptation of utility ratio per story considering view factor when estimating standard price for taxation. Among apartment complex located in adjacent north riverside highway, which inhabitants can overlook the Hanriver in their living room, the real sale prices of 204 apartment units sold out during the3/4 of 2002 were used. We found that there were the big difference between the calculated table figures of utility ratio per story with without considering view factor like the good view of Hanriver. The standard price as a taxing standard has been used when assessing tax on real estate, especially here on apartment, in Korea, however it is inevitably needed that this taxing standard should converge to real market price. Now is the time to change calculating method of the standard price into the substantial and real calculating method considering both story and view factors.
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감마선 조사에 의한 반도체 패킹용 플라스틱의 분출가스 특성
오동훈,차덕준 한국물리학회 2017 새물리 Vol.67 No.11
We measured the type and the amount of gas emitted by the plastic packing material for semiconductor packing when it was irradiated. In order to measure the gas emitted from the plastic material, we produced the plastic material in the form of a round bar. The plastic material was sealed with a glass tube and then irradiated with gamma rays from Co-60 (Cobalt-60) source. The irradiated gamma doses were 1 Gy, 1$\times$10$^2$ Gy, 1$\times$10$^4$ Gy, 1$\times$10$^6$ and 1$\times$10$^7$ Gy, and the tubes were classified according to the dose. Gamma-irradiated glass tubes were placed in a facility equipped with a GC analyzer to determine the amount and the type of gas in the glass tube according to the gamma dose. An analysis of the emitted gas confirmed that carbon monoxide, methane, carbon dioxide, and hydrogen carbon were generated. No emitted gas was observed at low doses; gas emission was confirmed as starting at 1$\times$10$^4$ Gy and increasing rapidly with increasing dose up to 1$\times$10$^6$ Gy. 본 연구에서는 반도체 패킹용 플라스틱 재료에 감마선을 조사하여 분출되는 가스의 종류 및 그 양을 측정하였다. 분출 가스를 측정하기 위하여 반도체 패킹용 플라스틱 재료를 환봉의 형태로 제작하였다. 제작된 플라스틱 시료는 유리관 넣고 밀봉한 후 Co-60 (Cobalt-60) 선원으로 감마선을 조사하였다. 조사된 선량은 1 Gy, 1$\times$10$^2$ Gy, 1$\times$10$^4$ Gy, 1$\times$10$^6$ Gy, 1$\times$10$^7$ Gy 단계를 나누어 조사하고 그 후 각 조사량에 따른 시편을 구분하였다. 감마선에 조사된 유리관을 유기 화합물 혼합체 분석법 (gas chromatography, GC) 분석기가 장착된 설비에 넣고 유리관 내부에 분출된 기체의 양과 종류를 분석하였다. 분출된 가스를 분석한 결과 일산화탄소, 메탄, 이산화탄소 및 탄화수소가 발생 되었음을 확인하였다. 가스 분출은 낮은 선량에서는 관측되지 않았으나 1$\times$10$^4$ Gy부터 가스 분출을 시작하여 1$\times$10$^6$ Gy에서 급격하게 증가하였다.
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안구운동 민감 소실 및 재처리 요법(Eye Movement Desensitization and Reprocessing) 치료 후 국소 뇌 혈류 변화:두 증례의 SPECT 연구
오동훈,최준호,Oh, Dong-Hoon,Choi, Joonho 대한생물정신의학회 2004 생물정신의학 Vol.11 No.2
Over the last decade, EMDR(Eye Movement Desensitization and Reprocessing) has emerged as a promising new treatment for trauma and other anxiety-based disorders. However, neurobiological mechanism of EMDR has not been well understood. Authors report SPECT findings of two patients of PTSD before and after EMDR. Brain 99mTc-ECD-SPECT was performed before and after EMDR treatment. To evaluate the significance of changes in the regional cerebral perfusion, t-test was conducted on the resulting images using SPM99. In addition, clinical scales(CAPS, CGI, STAI) were employed to asses the changes in the clinical symptoms of the patients. After EMDR treatment, each showed significant improvement in clinical symptoms. The cerebral perfusion increased in bilateral dorsolateral prefrontal cortex, and decreased in the temporal association cortex. The differences in the cerebral perfusion between patients after treatment and normal controls decreased. These changes appeared mainly in the limbic area the and the prefrontal cortex. These results suggest that EMDR may show the therapeutic effect through 1) improvement in the emotional control by increased activity in the prefrontal cortex, 2) inhibited hyperstimuli on amygdala by deactivation of the association cortex, 3) inhibition on past trauma related memory, and 4) keeping the functional balance between the limbic area and the prefrontal cortex. This case report needs further replication from studies with larger sample.
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