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호텔기업의 특성과 경영성과간의 관계에 관한 연구: 특급호텔의 재무(영업)적 특성을 중심으로
이계원,최동열 한국관광학회 2004 관광학연구 Vol.28 No.2
This study was conducted to examine the of sales environments, such as the scale of hotels, percentage of foreign guests and their connections with tourism companies, strategic factors, and financial characteristics, on managerial performance. This was done to aid in the reasonable decision-making processes of super-deluxe hotels in Korea. study used a multi-regression analysis, which revealed that the sales characteristics of hotels and the percentage of foreign guests and their with tourism companies were more significant variables. In terms of financial characteristic variables, the fixed asset turnovers and liquidity ratios valuablein the ROE in all the samples. In second-grade super-deluxe hotels, on the other hand, cash flow was determined to be the most variable.
이계원,김명재,이태원,김희진,김명임,고용호,임천규,나학열 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.6
In order to assess the difference of autonomic dysfunction according to the absence or presence of nephropathy in patients with NIDDM, tests for cardiovascular autonomic function were performed in 23 NIDDM patients without nephropathy(M:F 14:9, mean age 50±8) and in 21 patients with nephropathy (M:F 13:8, mean age 57±12). Tests for cardiovascular autonomic function included the R-R interval changes in response to respiration, Valsalva maneuver, and lying-standing, the blood pressure changes in response to lying-standing and sustained handgrip exercise. The prevalence of autonomic dysfunction was different between the patients without and with nephropathy(69.6% vs 85.7%). For patients without symptoms suggesting autonomic neuropathy, the significant differences were found in the change of R-R interval in response to respiration(22.16±21.30 vs 11.73±10.83; p=0.0390$gt;, in the change of lying-standing blood pressure(10.63±9.70 vs 22.00±13.67; p=0.0044) and in the change of blood pressure during handgrip exer6.89±10.28 vs 84O±7.24; p=0.0065). These results suggested that autonomic neuropathy may occur more frequently in patients with diabetic nephropathy than diabetes mellitus without neuropathy.
HPLC에 의한 목초액 중의 유기산, 페놀 및 벤조피렌의 분석법 개발
이계원,김아람,조재수,Lee, Gye-Won,Kim, A-Ram,Cho, Jae-Soo 대한약학회 2008 약학회지 Vol.52 No.1
The organic acids (formic acid, acetic acid and propionic acid), phenol and benzopyrene in wood vinegar were determine by HPLC. An $Atlantis^{TM}dC_{18}$ column with a acetonitrile: 0.1% phosphoric acid (5: 95, organic acids), acetonitrile: water (10 : 90, phenol), 100% acetonitrile (benzopyrene) as a mobile phase was used. Retention time of acetic acid, formic acid, propionic acid, phenol and benzopyrene was 4.77, 3.73, 9.08, 30.97 and 6.10 min, respectively. The calibration curves of organic acids, phenol, benzopyrene were linear over the concentration range of $30{\sim}500,\;60{\sim}1000$, and $3{\sim}50\;{\mu}g/ml$ with correlation coefficient of above 0.999. The limit of detection (LOD) and limit of quantitation (LOQ) of acetic acid, formic acid, propionic acid, phenol, and benzopyrene was 1.71 and 5.19, 1.11 and 3.35, 4.87 and 14.74, 6.45 and 19.55, 0.08 and $0.24\;{\mu}g/ml$, respectively. The coefficients of variation for intra- and inter-day assay were $0.21{\sim}4.14$ and $0.07{\sim}1.19%$, respectively and the precision was $95{\sim}115%$. From this study, we suggest that HPLC is suitable method for the determination of organics in wood vinegar and could be applied to quality control of wood vinegar.
이계원 한국정보사회진흥원 2008 정보화정책 Vol.15 No.4
도시통합운영센터는 u-City내 통신망, 교통망, 시설물 등으로부터 도시정보를 수신하고 이를 통합적으로 분석하여 도시를 효과적으로 운영, 관리하고, 시민이나 관련 기관에 분석된 도시정보를 실시간으로 제공해주는 u-City의 메인 센터이다. u-City의 핵심이 되는 도시통합운영센터의 개념은 아직 초기 단계이고, 구현 사례가 많지 않아 아직 이론과 현실의 차이가 큰 편이다. 본 논문에서는 도시통합운영센터 관련 국내외 선행연구들을 조사하고, 실제사례 분석을 통하여 도시통합운영센터의 운영과정에서 발생하는 현안과제로 새로운 운영조직 마련, 운영예산 확보, 통합 서비스 제공, 통합플랫폼 구현, 법제도 미비 등을 도출하였다. 이에 대한 개선방안으로는 1. SPC라는 새로운 운영조직 형태 제시, 2. 시설물, 인력, 에너지 등의 통합관리를 통한 비용절감, 3. 공공서비스와 민간서비스의 경계를 넘어서는 새로운 통합서비스 모델 제시, 4. u-Eco City 연구과제와 연계한 통합플랫폼 개발방안 제시, 5. u-City 운영법과 같은 새로운 법제도 마련 등 5가지 개선방안을 제시하였다. u-City operation center receives data from communication network transport network and facilities in the u-City and analyzes them to more efficiently run and manage the city and to provide analyzed city information to citizens and relevant organizations real-time. The concept of the u-City operation center, which is the hub of u-City, is in its initial phase. There are still big discrepancies between theory and reality. This paper analyzes previous research and actual cases of the u-city operation center, delineating five major issues that still need to be actualized: organizing a new operating organization, securing a budget providing the integrated service, implementing the integrated platform, and legislating law. This study proposes the following five methods of improvement to resolve these problems: 1. utilize SPC (Special Purpose Company) as the new operating organization, 2. implementing a more integrated, cost-efficient management of the facility human resources, and energy, 3. apply the new integrated service models beyond the boundaries of the public services and private services, 4. develop the integrated platform with u-Eco City research project and 5. refine the legislation for u-City operation.
이계원,채현석,박용범,이연정,이보인,조영석,김성수,한석원,이창돈,최규용,정인식,송선화,안창혁 대한소화기내시경학회 2003 Clinical Endoscopy Vol.26 No.1
Esophagogastric varices are considered to be the most common complication in patients with portal hypertension. Among ectopic varices, rectal varices are infrequent but potentially serious complication. The etiology and pathogenesis of rectal varices remains controversial. Several kinds of treatment have been performed but standard treatment for rectal varices has not been established. Herein we report a case of rectal varix bleeding treated with endoscopic variceal ligation (EVL) and then evaluated by transrectal color doppler ultrasonography. (Korean J Gastrointest Endosc 2003;26:52-55) 식도와 위 정맥류는 문맥압 항진증의 주요한 합병증 중의 하나이다. 그러나 식도와 위 이외 부위의 이소성 정맥류 중 직장 정맥류는 흔치 않지만 혈변의 중요한 원인이다. 직장 정맥류의 원인과 기전에 대해서는 아직 논란이 있으며 적절한 치료법도 확립되어 있지 않다. 이에 저자들은 혈변을 주소로 내원한 간암을 동반한 간경변증 환자에서 직장 정맥류 출혈로 의심하여 내시경적 밴드 결찰술을 시행한 후, 경직장 컬러 도플러 초음파로 직장 정맥류임을 확인한 1예를 경험하였기에 문헌고찰과 함께 보고하는 바이다.