Hallervorden-Spatz 병 환자의 전신마취 하 치과치료 -증례보고-

이용기,서광석,김현정,염광원,안병덕,Lee, Yong-Ki,Seo, Kwang-Suk,Kim, Hyun-Jeong,Yum, Kwang-Won,Ahn, Byung-Deok 대한치과마취과학회 2007 Journal of Dental Anesthesia and Pain Medicine Vol.7 No.2

Hallervorden-Spatz disease (HSD) is a rare autosomal recessive disorder associated with excessive iron deposition in the basal ganglia. In general, HSD is characterized by onset in first two decade of life and by the presence of extra-pyramidal dysfunction including dystonia, rigidity, choreoathetosis. Other associated features include gait and posture disturbance, intellectual decline, seizure, tremor, dysarthria. These signs and symptoms are progressive. MRI is often demonstrated hypodensity in the basal ganglia which is probably suggestive of accumulation of iron. There is no specific treatment for HSD and 45% of patients die before reaching the age of 20 years. The managements directed at specific symptoms are often helpful. Especially, some surgical procedures like pallidotomy and gastrostomy are performed under general anesthesia. There is special need for careful management because of numerous anesthetic challenges like difficulty in cooperation, life-threatening airway obstruction and possibility of aspiration. We report a successful anesthetic management in a patient with HSD for dental procedures.

산림휴양지 유형에 따른 피톤치드(모노테르펜) 농도 비교

이용기,우정식,최시림,신은상,Lee, Yong-Ki,Woo, Jung-Sik,Choi, Si-Rim,Shin, Eun-Sang 한국환경보건학회 2015 한국환경보건학회지 Vol.41 No.4

Objectives: This study was conducted to provide scientific and effective information on phytoncides, which are associated with forest healing, and to activate recreational forests. Methods: The target sites were natural recreation forests, a forest park and an arboretum, and the control sites were three urban parks. The samples were collected at a volume of 6.0 L and a flow rate of 0.1 L/min for one hour using a low volume pump and the solid adsorbent sampling method. The phytoncide compounds adsorbed in the Tenax TA tube were analyzed by a automatic heat desorption unit and GC-MS. Results: By type of recreational forest, the annual concentrations of phytoncide (monoterpene) for the forest park showed the highest concentration with $1.450{\mu}g/m^3$, while those for the arboretum showed the lowest concentration at $0.892{\mu}g/m^3$, and thus the concentration of the forest park was approximately 1.6 times higher than the arboretum. The season showing the highest concentration of phytoncides was summer (June) and the forest park was the highest among the recreational forests. The concentrations of major components for phytoncide showed in descending order: ${\alpha}-pinene$, ${\beta}-pinene$, camphene, 3-carene and limonene. The seasonal concentration of ${\alpha}-pinene$, camphene and ${\beta}-pinene$ by type of recreational forest increased in April, which is characterized by low temperature and humidity, and the seasonal concentration of camphene decreased with higher humidity. The meteorological factors which had the high correlation with the concentration of total terpene were temperature and humidity. $CO_2$ and $O_2$ showed an inverse correlation. Conclusion: The major components of phytoncide were ${\alpha}-pinene$, ${\beta}-pinene$, camphene, 3-carene and limonene in descending order of concentration. Further and systematic study on the chemical nature of individual phytoncides, and on the effect of phytoncides on humans needs to be performed.

경기도 환경대기 중 휘발성 유기화합물의 농도특성에 관한 연구

이용기(Yong Ki Lee),정주용(Joo Yong Jung),임흥빈(Heyng Bin Lim),김주열(Joo Yul Kim) 한국환경분석학회 1999 환경분석과 독성보건 Vol.2 No.4

N/A

소화성 궤양의 임상적 고찰

이용기(Yong Ki Lee),김재만(Jae Man Kim) 대한외과학회 1997 Annals of Surgical Treatment and Research(ASRT) Vol.53 No.2

골프연습장의 환경특성이 서비스품질, 고객만족 및 구매행동의도에 미치는 영향

이용기(Lee Yong-ki),신두철(Shin Doo-chul),류철(Lryu Cheol) 한국스포츠산업경영학회 2000 한국스포츠산업경영학회지 Vol.5 No.1

본 연구는 골프연습장의 환경특성 중 어떠한 요인들이 소비자들의 전반적 서비스품질 평가에 영향을 미치며, 그 결과 고객만족 및 구전, 재이용의도 등의 구매행동의도에 어떠한 영향을 미치는 가를 실증분석 하였다. 서울, 부산, 대전, 충북, 경기의 5개 지역에 소재하고 있는 18개 골프연습장의 126명 이용고객으로부터 자료를 수집하였으며, 경로분석을 이용하여 연구가설을 분석하였다. 실증분석 결과, 본 연구의 요약은 다음과 같다. 첫째, 골프연습장의 환경특성 중 고객서비스, 시설/장비, 편리성 등의 요인이 전반적 서비스품질 평가에 유의적인 정(+)의 영향을 미치는 것으로 나타났다. 둘째, 전반적 서비스품질의 지각 정도가 높을수록 고객만족이 높아지며, 그 결과 구전커뮤니케이션과 재이용의도에 유의적인 영향을 미치는 것으로 나타났다. The purpose of this study was to investigate the effects of golf training facilities' environments on evaluation of service quality and purchase behavior intentions. To analyze the data collected from 126 respondents, path analysis was employed. The results can be summarized as follows. First, customer service, facilities/equipment, and convenience factors had a significant positive effect on the perception of overall service quality. Second, the higher perceived overall service quality, the higher customer satisfaction, in turn, the higher word-of-mouth communications and repurchase intentions.

논문 : 일제의 동계(洞契) 조사와 식민주의적 시선

이용기 ( Yong Ki Lee ) 수선사학회 2008 史林 Vol.0 No.31

주의력결핍 과잉행동성장애(ADHD) 아동의 작업기억 과제 수행 시 fMRI 분석

이용기(Yong-Ki Lee),안성민(Sung-Min Ahn) 한국콘텐츠학회 2014 한국콘텐츠학회논문지 Vol.14 No.12

주의력결핍 과잉행동장애(ADHD) 학생의 지적결함, 학습 문제 및 저조한 학업 성취는 이들이 정상 학생에 비해 현저하게 낮은 지능을 가졌기 보다는 주의를 집중하지 못하는 특성 때문이다. 따라서 본 연구에서는 ADHD 학생들과 정상군 학생들의 뇌기능영상을 비교 분석함으로써 ADHD 학생들의 뇌기능 차이와 작업기억 과제 시 나타나는 뇌의 활성영역의 차이를 보고자 하였다. 인천지역 초등학교 학생 26명을 대상으로 뇌기능영상과 임상설문검사를 실시하였으며, 뇌기능영상의 자극은 작업기억으로 하였다. 분석에는 통계적 파라미터 지도작성법과 사회과학통계패키지를 이용하여 단일표본 t 검정, 두 표본 t 검정, 다중 회기 분석 등으로 분석 하였으며, 통계적 유의수준은 p<0.05에서 나타내었다. 그 결과 ADHD 학생들의 전두 피질, 두정엽 피질, 시상, 미상핵 등 많은 부분에서 불균형적인 발달을 볼 수 있었다. 또한, 작업기억 과제 수행의 어려움을 느낄수록 일부 안와 전두 피질, 해마가 활성화되었다. 보다 많은 ADHD 학생들의 대상자가 확보되어 ADHD 유형별 연구가 필요하며, 뇌기능영상에서 보다 많은 자극으로 실험한다면 ADHD 학생들의 전반적인 뇌기능평가에 유용할 것으로 판단된다. Attention deficit hyperactivity disorder (ADHD) students’ intellctual defects, learning problems, and poor academic achievements seem to be due to significantly lower intelligence compared to the normal students, but rather the characteristic of inability to pay attention at a given time can be seen as the more attributing reason. In this study, a comparison between the ADHD students and the normal students will be performed using a fMRI analysis in order to differentiate the brain function between the two groups during a working memory task performance and to assess the difference in the activated regions of the brain. Clinical survey examinations and fMRI measurements were performed for a group of 26 elementary students from the Incheon area. The stimulus of fMRI was a working memory. Cartography statistically analyzed parameters and the Statistical Package of Social Sciences using single-sample t-test, two-sample t-test, were analyzed by multiple regression analysis, the statistical significance level was p <0.05 in, respectively. The disproportionate developments could be seen in the ADHD students group such as the frontal cortex, parietal cortex, thalamus, and caudate nucleus, among others. In addition, as some students felt the increase in the difficulty of working memory task performance, the orbitofrontal cortex and the hippocampus were activated, which seems to be the result of an effort for looking for an answer. More types of ADHD students needs to be secured as research subjects, and more stimulations for fMRI experiments should be considered as it would be useful in the overall evaluation of brain function.

일제시기 을종 농업학교의 특성과 학생 구성 : 상주공립 농잠학교의 사례

이용기 ( Lee Yong-ki ) 국민대학교 한국학연구소 2021 한국학논총 Vol.55 No.-

이 논문은 일제시기 농업학교에 관한 연구를 사회사적 맥락으로 확장하려는 문제의식에서 출발한다. 이를 위해 3년제 을종 농업학교였던 상주공립농잠학교의 특성과 학생들의 인적 구성을 살펴보았다. 상주농잠학교는 1921년 경상북도에 두 번째로 세워진 농업학교인데, 지역사회의 적극적 참여보다는 관 주도로 설립되었다. 잠업을 특화한 학교로서 전문성을 가졌지만, 을종 학교로서의 한계가 컸기 때문에 갑종 학교로 승격되려는 시도를 계속 전개하였다. 상주농잠학교는 5년제 갑종 학교에 비하면 입학 경쟁률이 낮았으며, 반면에 졸업률은 높은 편이었다. 이는 을종 농업학교가 상대적으로 경쟁력을 갖지 못하면서도 기존 질서에 안주하는 분위기가 있었음을 의미한다. 상주농잠학교는 고연령 구조가 크게 완화되지 못한 채 지속되었고, 1920년대 중반까지도 정규 교육을 받지 못한 자들이 입학생 중에 적잖은 비중을 차지하였다. 또한 학생들의 사회경제적 배경은 극단적일 정도로 농업 편중이 심했고, 출신지 또한 경북 출신에 한정되다시피 하였다. 상주농잠학교는 대체로 학교 소재지 인근 지역의 농가에 그 영향력이 제한되었다고 볼 수 있겠다. 이처럼 3년제 을종 농업학교가 5년제 갑종 농업학교에 비해 위상과 영향력이 낮았던 사실은 일제시기 조선사회에서 학력의 위계 구조가 강하게 작동하고 있었음을 말해준다. This study starts with the purpose of expanding research on agricultural schools during the Japanese colonial period into the context of social history. To this end, the characteristics of Sangju Public Agricultural & Sericultural School(SPASS), which was a three-year term second-grade(Euljong, 乙種) agricultural school, and the personal composition of students were examined. SPASS was established in Gyeongsangbuk-do in 1921, and was founded by the government rather than active participation of the local community. As a school specializing in sericulture, it had a professionalism, but because of its limitations as an Euljong school, it continued to try to be promoted to a first-grade(Gabjong, 甲種) school. SPASS had a lower entrance competition rate compared to the five-year term Gabjong school, while the graduation rate was higher. This means that Euljong agricultural school was relatively incompetent, but had an atmosphere of conformity to the existing order. SPASS continued without much easing of the old age structure, and even in the mid-1920s, those who did not receive formal education accounted for a significant proportion of the enrolled students. In addition, the socioeconomic background of the students was extremely concentrated in agriculture, and the place of origin was limited to those from Gyeongsangbuk-do. It can be seen that SPASS has limited influence on farmhouses in the area near the school location. The fact that the three-year Euljong Agricultural School had a lower status and influence than the five-year Gabjong Agricultural School showed that the hierarchical structure of education was working strongly in Koean society during the Japanese colonial period.

비평면 조사창에서의 암반절리 크기분포 추정을 위한 Joint Center Volume (JCV) 산정 기법 제안

이용기(Yong-Ki Lee),송재준(Jae-Joon Song) 한국암반공학회 2019 터널과지하공간 Vol.29 No.2

암반구조물의 역학적 안정성과 수리적 특성을 분석하는데 있어 암반절리는 매우 중요한 역할을 한다. 방향, 크기, 체적빈도, 위치 등 대부분의 암반절리 파라미터들은 일반적으로 통계적인 기법에 의해 분포로 나타낸다. 본 연구에서는 이러한 암반절리 파라미터들 중 가장 불확실성이 큰 크기분포를 추정하는데 요구되는 Joint Center Volume(JCV) 산정 기법에 대해 분석하고, 조사창의 형상과 관계없이 적용할 수 있는 새로운 기법을 제안하였다. 기존 JCV의 이론적 산정법은 평면 조사창에만 적용이 가능하고, 전수조사 기법은 절리선 종류의 제약 및 해석시간 문제 등의 한계를 보였다. 본 연구에서는 몬테카를로 시뮬레이션을 이용하여 JCV를 산정하여, 조사창 형상 및 절리선 종류의 제약이라는 한계를 극복하고자 하였다. 제안된 기법은 곡면형, 터널형과 같은 비평면 조사창에서의 추정결과를 통해 적용성을 검증하였다. Rock joints have an extremely important role in analyzing the mechanical stability and hydraulic characteristics of rock mass structures. Most rock joint parameters are generally indicated as a distribution by statistical techniques. In this research, calculation technique of Joint Center Volume (JCV) is analyzed, which is required for estimating the size distribution having the largest uncertainty among the joint parameters, then a new technique is proposed which is applicable regardless of the shape of survey window. The existing theoretical JCV calculation technique can be applied only to the plane window, and the complete enumeration techniques show the limitations in joint trace type and analysis time. This research aims to overcome the limitations in survey window shape and joint trace type through calculating JCV by using Monte Carlo simulation. The applicability of proposed technique is validated through the estimation results at non-planar survey windows such as curved surface and tunnel surface.

인터넷과 모바일 뱅킹의 채널신호에 대한 비교 분석

이용기(Yong-Ki Lee),이필수(Phil-Soo Lee),정남호(Nam-Ho Chung),박종현(Jong-Hyun Park) 국제e-비즈니스학회 2008 e-비즈니스 연구 Vol.9 No.2