• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.05a
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• pp.239-243
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• 2001

최근 각종 질병과 사고로 평형감각에 이상이 있는 환자가 증가하고 있다. 이들의 빠른 사회로의 환원을 위해서는 평형감각을 회복시킬 수 있는 효율적인 재활훈련이 필요하다. 하지만 기존 장비들은 근력을 길러주거나 특정감각기관만을 훈련시켜주는 정도의 재활만이 가능하다. 따라서 본 연구에서는 가상현실기술과 자전거를 이용하여 평형감각 실조환자의 진단 및 시각, 전정감각, 체성감각 등을 효율적으로 진단하고 자극, 훈련시킬 수 있는 bike simulator system을 개발하였다. 그리고 본 시스템이 재활훈련에 유용한지 실험 검토하였다. 실험결과 본 시스템을 통한 반복실험결과 COP의 값을 통하여 평형감각의 정량적 측정, 분석이 가능하였고, 훈련시 COP를 실시간으로 visual feedback함으로서 평형감각의 조절과 balance의 유지기능이 향상함을 확인하였고 본 시스템이 통합평형감각 측정 및 훈련용 재활장비로 유용함을 알 수 있었다.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.148-150
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• 2002

침입자. 화재. 폭발이나 기계 이상과 같은 인적, 물적 재산에 피해를 입힐 수 있는 대부분의 응급 상황은 시각적으로 인식 가능하다. 따라서 사고가 발생하기 이전에 사고의 발생 가능성을 관계자에게 신속히 전달하여 인적, 물적 피해를 입지 않게 또는 최소화할 수 있게 대처하는 것이 필요하다. 이미지 기반의 지능형 경보/모니터링 시스템을 개발하여 자동적으로 비정상 상태를 인식하고 이를 관계된 사람들에게 인터넷과 전화, PCS, PDA로 신속하게 전달하는 유무선 통신 네트워크에서의 오브젝트 이미지 기반의 지능형 경보/모니터링 시스템을 구현하였다. 이 논문에서는 이미지 기반의 지능형 경보/모니터링 시스템의 구성에 대하여 설명하고 각 구성 요소의 기능에 대해서 설명한다

• Proceedings of the Korea Information Processing Society Conference
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• 2020.05a
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• pp.464-467
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• 2020

조현병(정신분열증)은 사고, 감정, 지각, 행동 등 인격의 여러 측면에 걸쳐 광범위한 임상적 이상 증상을 일으키는 정신 질환이다. 심각한 정신 질환임에도 불구하고 여전히 과학적 진단 체계가 갖춰져 있지 않아 진단의 많은 부분을 환자의 진술에 의존하고 있으며, 이로 인해 조현병이라는 진단을 받고 치료방법을 찾는데 까지 오랜 시간이 걸린다. 이에 본 연구는 EEG, MRI 데이터와 조현병의 상관관계를 이용한 조현병 진단 시스템을 제안하고자 한다. 본 시스템은 MRI 데이터와 머신러닝 알고리즘을 통한 조현병의 확률적 진단과 함께, EEG 데이터의 시각화 기능을 제공하는 소프트웨어를 개발함으로써 조현병 진단의 과학적 근거를 의사에게 제공하여 정확한 병의 진단을 목표로 한다. 진단 후에는 환자 데이터의 체계적 관리를 통해 머신러닝 알고리즘의 학습 데이터 확보 및 환자의 상태를 지속적으로 관리·관찰 할 수 있도록 하여 의료 소프트웨어로서 조현병의 체계적 진단 및 관리 시스템을 구축한다.

• Journal of Korea Entertainment Industry Association
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• v.13 no.2
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• pp.101-110
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• 2019

Filmic spaces are not only a core expressive factors that can embody both internal and external meanings of films, but also play an important role for initiating dramatic context in terms of narratives. They establish visible environment in which provocative incidents occur and characters' behaviors are induced, include characters' psychology or emotional meanings of narratives and provoke tensions through symbolic meanings and the implicit function of surface background. This paper, therefore, analyzes the film, , by focusing on the dramatic function of narrative space. This film provides insights and thoughts through deep philosophical reflection, by escaping from the convention of such a genre, through deep philosophical reflection, by escaping from the convention of such a genre, though it belongs seemingly to the crime thriller genre using Mexico's drug cartel as it main material. In the film, narrative spaces are responsible for emotions invoking dramatic tensions beyond provocative incidents and the elaborately planned and controlled mise-en-scene absorbed audiences' attention by organizing ultimate suspense. In conclusion, flow and dramatic lingering imagery of this film might be achieved by power of scenes rather than plot factors. This study thus explained the correlation between narrative spaces and dramatic immersion, by analyzing spaces appearing in and visualized construction. It is hoped that this will further extends the pattern of researches on dramatic immersion, which have been primarily focused on plots and characters.

• Journal of Digital Contents Society
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• v.4 no.1
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• pp.67-79
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• 2003

With the advent of digital age, we've come to have an affinity with multimedia, in our daily lives, which has the most visual images. Everyday, more than 90 percent of people watch television, and most of them spend their time watching television and use internet for their leisure time activity. Multimedia change and diversify rapidly and have powerful potential. However, it is true that there is a considerable limit in the use of and application for their function. In this study, I've aimed at supporting the potential of therapeutic function which visual images have as the most powerful brain-stimulating-media. In order to accomplish the purpose of this study, I've placed chroma therapy in the element of video production. Thus, I've produced functional videos which shall be the backbone of video therapy. For EEG and psychology test, 1 chose 25 employees as sample group, and testified the potential of it.

• Journal of Navigation and Port Research
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• v.34 no.8
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• pp.603-607
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• 2010

The LORAN system had been used widely and it was an essential navigation aid for ships in the ocean until the GPS is adopted actively. In particular, it was essential functionality for the ships to sail the oceans. According to the advancement of industry, however, the current accuracy of traditional Loran is insufficient for the utilization of harbour approach, land navigation, and the field of survey and timing. Therefore it is necessary that the study on the improvement of the positioning accuracy of Loran. The one of the improving methods is to measure and compensate the propagation time delay between the transmitter and user's receiver, which is called as additional secondary factor (ASF). In this study, we measured the ASF between the Pohang master transmitting station (9930M) and four points where locate within 33 km apart from the transmitting station, using the measuring technique of the absolute time delay without a time of coincidence (TOC) table. As the result of measurement, the ranging error caused by the propagation delay was about 210 m at 33 km, however it can be reduced up to 40 m with ASF compensation.

• The Journal of the Korea Contents Association
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• v.13 no.7
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• pp.417-431
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• 2013

During the development process of mega-project, individual buildings including skyscrapers are built following the master plan. It is not a difficult thing to see the gap of standpoint between the urban planners and architects on the project. This study aims to analyze the difference between architect and urban planner's point of view in evaluating international design competition works which the internationally distinguished honorable design companies(SOM, Jerde Partnership, Studio Daniel Libeskind, Foster+Partners and Asymptote Architecture) submitted as the ideas of Yongsan International Business District Design. Furthermore, we made an attempt to quantify the weight of each factors of urban design by each group. Architect and urban planner's viewpoint were revealed with seven architects and seven urban planners evaluating the international design competition works through AHP(Analytical Hierarchy Process). AHP structure was made of two step hierarchy in terms of Master Plan and Landmark Tower. Eight evaluation criteria were set up such as the concept, land use, transportation, feasibility of Master Plan and the concept, location, functional efficiency and aesthetic beauty of Landmark Tower. Results show that Architect have different point of view from that of urban planner. While the architect's weight of evaluation criteria is on the Landmark Tower(0.505), urban planner's weight is on Master Plan(0.642). Feasibility, the location of Landmark Tower and land-use are very important evaluation criteria to architect and urban planner in common. Functional efficiency of Landmark Tower is in architect's favour and transportation is in urban planner.

• Sleep Medicine and Psychophysiology
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• v.21 no.1
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• pp.5-13
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• 2014

Objectives: Depression, sleep complaints and cognitive impairments are commonly observed in the elderly. Elderly subjects with depressive symptoms have been found to show both poor cognitive performances and sleep disturbances. However, the relationship between sleep complaints and cognitive dysfunction in elderly depression is not clear. The aim of this study is to identify the association between sleep disturbances and cognitive decline in late-life depression. Methods: A total of 282 elderly people who underwent nocturnal polysomnography in a sleep laboratory were enrolled in the study. The Korean version of the Neuropsychological Assessment Battery developed by the Consortium to Establish a Registry for Alzheimer's Disease (CERAD-K) was applied to evaluate cognitive function. Depressive symptoms were assessed with the geriatric depression scale (GDS) and subjective sleep quality was measured using the Pittsburg sleep quality index (PSQI). Results: The control group ($GDS{\leq}9$) when compared with mild ($10{\leq}GDS{\leq}16$) and severe ($17{\leq}GDS$) depression groups, had significantly different scores in the Trail making test part B (TMT-B), Benton visual retention test part A (BVRT-A), and Stroop color and word test (SCWT)(all tests p<0.05). The PSQI score, REM sleep duration, apnea-hypopnea index and oxygen desaturation index were significantly different across the three groups (all indices, p<0.05). A stepwise multiple regression model showed that educational level, age and GDS score were predictive for both TMT-B time (adjusted $R^2$=35.6%, p<0.001) and BVRT-A score (adjusted $R^2$=28.3%, p<0.001). SCWT score was predicted by educational level, age, apnea-hypopnea index (AHI) and GDS score (adjusted $R^2$=20.6%, p<0.001). Poor sleep quality and sleep structure alterations observed in depression did not have any significant effects on cognitive deterioration. Conclusion: Older adults with depressive symptoms showed mild sleep alterations and poor cognitive performances. However, we found no association between sleep disturbances (except sleep apnea) and cognitive difficulties in elderly subjects with depressive symptoms. It is possible that the impact of sleep disruptions on cognitive abilities was hindered by the confounding effect of age, education and depressive symptoms.

• Korean Journal of Occupational Therapy
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• v.26 no.4
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• pp.57-72
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• 2018

Objective : This study aims to identify the self-reported driving abilities of elderly drivers and their correlations to the demographic factors that influence them, and to verify the adequacy of the hypothetical model, constructed based on vision, auditory, cognition, motor, and psychological factors, in order to present a path model on the self-reported driving abilities of elderly drivers. Methods : The participants in this study were 122 elderly drivers aged 65 years or older residing in the community. This study evaluated the following factors of the participants: Vision and hearing, motor ability, cognitive ability, depression, self-reported driving abilities. Results : The results of this study are as follows. In the case of men, the self-reported driving ability score was higher than for women, and those driving 6-7 days per week had higher scores than those driving 3 days or less. The period of holding a driver's license and driving experience positively correlated with self-reported driving abilities. The final model of factors influencing the self-reported driving abilities of elderly drivers had a p value (.911) exceeding .05; TLI (1.202), NFI (.949), and CFI (1.000) of over .90; and RMSEA (.000) of lower than 0.1, indicating that the hypothesis model fit the data well. First, the directly influential factors on the self-reported driving abilities of elderly drivers were depression, decreased hearing, and grip strength. Second, age was found to have a direct influence on depression and grip strength; moreover, depression and grip strength as a mediator indirectly influenced their self-reported driving abilities. Third, depression was found to have a direct influence on their delayed cognitive processing and grip strength. Conclusion : The significance of this study is in the identification of direct and indirect factors influencing the self-reported driving abilities of elderly drivers in regional communities, and in the verification of multi-dimensional effects of diverse factors influencing such abilities.

• Sleep Medicine and Psychophysiology
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• v.5 no.2
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• pp.194-201
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• 1998

Objectives : This study was aimed to investigate the differences in intelligence and neuropsychological test findings between patients with obsessive-compulsive disorder(OCD) and normal controls, and to find out brain functions. Methods : To examine the brain functions, Halsted Reitan neuropsychological test, computerized neuropsychological test, Wechsler Memory scale and K-WAIS were applied. Subjects of this study consisted of 12 patients with OCD and 17 normal controls who were matched for age, handedness and education year. Results : The verbal intelligence of OCD was significantly higher than that of normal controls. But there was no significant difference in total and performance intelligence between groups. The total time of tactual performance test in OCD was significantly delayed than that in normal controls. Also the visual recall of Wechsler memory scale in OCD was more impaired than that in normal controls. Conclusion : These findings support that visual-spatial memory, which is related to basal ganglia, is impaired in OCD.