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.

IP 분석을 통한 수안보 온천제의 활성화 방안에 관한 실증연구

이용기(Yong Ki Lee),정남호(Nam Ho Chung),이충기(Choong Ki Lee) 한국호텔외식관광경영학회 2006 호텔경영학연구 Vol.15 No.1

호텔기업 식음료종사원의 LMX의 질이 신뢰와 직무성과 및 협력 행동에 미치는 영향

이용기(Yong Ki Lee),손문현(Mun Hyeon Son),이두진(Doo Jin Lee),김민성(Min Seong Kim) 한국호텔외식관광경영학회 2010 호텔경영학연구 Vol.19 No.6

This study was to examine the structural relationships among an Quality of LMX, trust, job performance, and helping behavior of hotel F/B service employees. For these purposes, the authors developed several hypotheses and collected data from 276 employees of hotel restaurant site. In this model, quality of LMX was proposed to affect cognitive and affective trust. Cognitive and affective trust have effects on job performance and helping behavior. Helping behavior is influenced by job performance. The data were analyzed with structural equation modeling with AMOS 16.0 and SPSS Win/PC 18/0. The result of the overall model analysis appeared as follows: χ2=277.452, d.f=143(χ2/d.f=1.940), p=0.000, GFI=0.909, AGFI=0.879, RMSEA=0.058, NFI=0.936, CFI=0.968. Since the result of the overall model analysis demonstrated a good fit, the authors could further analyze our data. The findings can be summarized as follows: First, quality of LMX has directly positive effects on cognitive trust and affective trust. Also quality of LMX has indirectly effects on job performance and helping behavior. Second, cognitive trust has positive effects on job performance and helping behavior. Third, affective trust has a positive effect on job performance and does not have any effect on helping behavior. Fourth, job performance has a directly positive effect on helping behavior.

식민지기 민중의 셈법과`자율적` 생활세계 ―생활문서의 화폐기록을 통하여

이용기 ( Lee Yong Ki ) 역사문제연구소 2010 역사문제연구 Vol.14 No.1

Examined in this article are some interesting characteristics which could be spotted in certain documents that concerned the everyday life of the people during the Japanese occupation period. They are carefully examined in oder to explore the people`s lives and thinking, which would have been built and formed upon a basis that should have been clearly different from the state`s `official order.` Inside all the account books created for the Gye/契 credit unions of the time, which were essentially, documented records that retained substantial closeness and relevance to the lives of ordinary people, the traditional `Yang/兩-Jeon錢-Bun/分` system that had been used to count for Joseon Yeobjeon coins in earlier periods was still being used. It should be noted that such old system was being used in the place of a modern currency system(`Weon/圓-Jeon/錢`) which was recently established (by the Japanese-affiliated authorities). It was indeed peculiar that such old system was still being used, even when it had been quite a while since the beginning of the Japanese occupation. In 1905, the authorities` policy of reforming the currency system had already adopted the Weon-Jeon system as the only legitimate currency system, and all the Yeobjeon coins were removed from the market. Yet not only in the 1920s and 1930s but also even in the 1940s, the old system was still in use in managing account books. What would have been the reason? First, examination of materials produced by the Governor-general office, or other resources such as newspapers and even personal journals, reveals that at least in the mid-1920s the new currency system managed to dominate the market even inside the rural areas as well, and the Yeobjeon coins were only serving as an assisting currency in local communities, carrying small denominations. Second, we can see that, notwithstanding the situation mentioned above, the currency system that accounted value with the Yang unit prevailed in the late 1920s and even in the early 1940s. Such prevailing was made possible with the urge to veto a colonized modernization process, and to withhold the traditions and also keep their own `senses.` In other words, the most primary driving force that existed behind maintaining the usage of the old currency system, was a deliberate effort to put a distance between the colonial authorities and the people themselves, and also to maintain the people`s own unique value system and living styles, which they refused to change according to the colonized modernization process. Third, we can see that maintaining the traditional currency system was not a mere matter of philosophy. Such efforts were able to continue partly because the new official currency system was not yet capable of fully covering the entire market of Joseon, in which exchanging items and credits [instead of money] was also a normal practice. Added to that, such maintaining of efforts was also made possible thanks to the existence of regional/local (dong-)Gye credit unions, which were composed of elements such as `created traditions` and the `publicness of the people.` From all these records, we can see that although the people`s autonomous world of life was not entirely free or independent from the imperial and colonial authorities and not to mention its official new currency system, the authorities ultimately failed to establish a central, unified nature for the new currency system, which was essential for establishing a modern nation. And that was where disruptive changes were made possible, on the most basic and primary levels of living. The fact that the old traditional currency system remained and existed for quite some time, even during the Japanese occupation period, shows us that all those modern changes forced upon the Korean people by the colonial authorities were in fact not able to be implemented in Korea that unilaterally and in full capacity. There were indeed many cracks, violations and loopholes. And that was exactly how a modernization process unfolded in the colonized Joseon.

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.

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

Relational Approaches to Control Systems

이용기(Yong Ki Lee),권용주(Yong Ju Kwon),이경아(Kyung Ah Lee) 한국호텔외식관광경영학회 2007 호텔경영학연구 Vol.16 No.4

This study is designed to examine the relationships among control systems, relationship quality between managers and employees (satisfaction with and trust in managers), and organizational commitment in hotel context. The findings of this study suggest that (1) output rewards, activity rewards, capacity information, and capacity rewards are powerful predictors of satisfaction with a manager; (2) satisfaction with a manager significantly influences trust in a manager; and (3) relationship quality between managers and employees has a significant effect on organizational commitment of employees.

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

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.