• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• 제27권5호
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• pp.457-463
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• 2001

In the unconscious patient with general muscle rigidity, the natural teeth can be luxated and then bite wounds may be occurred around lip, owing to the pathologic involuntary self-biting habit. If the forceful biting is generated continuously, the teeth may be avulsed and aspirated into the aerodigestive tract with the infection of biting wound. For the prevention of pulmonary aspiration of the teeth and wound infection, the biting teeth should be cared before the fact. The authors treated the teeth as endodontic drainage with removal of the crown or iodoform gauze drainage into the socket with extraction of the teeth. The prognosis was more favorable without biting wounds.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 B
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• pp.1145-1146
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• 2006

분산 형 전원 및 석탄 가스화와 연계한 복합 발전이 가능한 용융탄산염 연료전지(MCFC : Molten Carbonate Fuel Cell)는 천연가스, 석탄가스 등 다양한 연료를 사용할 수 있고, 공해요인이 적고, 높은 에너지 변환효율을 가지고 있어 전력사업 분야에 적용 가능성이 가장 큰 새로운 발전방식이다. 국내에서도 1993년부터 선도기술개발 사업의 하나로 시작하여 현재 250 kW급 발전시스템 개발 연구가 진행되고 있다. 250 kW개발 전 수행한 100 kW급 MCFC 발전 시스템 개발 연구에서는 6,000cm2 급 단위전지 90장으로 구성된 50 kW급 MCFC 스택 2기 로 구성된 100 kW MCFC 스택과 이를 운전 평가를 위한 시스템을 완성하였다. 2005년부터 스택운전에 필요한 시스템 내 단위기기들에 대한 시운전을 진행 한 후 장착된 100 kW MCFC 스택 운전에서는 시스템 단위 기기의 고장으로 전 부하운전을 실시하지 못했지만 상압 상태에서 AC 50 kW 전력을 계통과 연계 운전 시험을 진행하였다. 향후 100 kW MCFC 시스템 보완후 재 운전 시험을 진행할 예정이다. 한편 병행하여 진행되는 250 kW 열병합 발전 시스템 개발에서는 시스템 상세설계 및 신형 분리판을 이용한 새로운 형태의 스택을 개발 운전시험을 진행하고 있다. 여기에서는 MCFC 발전 시스템의 개요와 시스템의 운전을 위한 운전 모드 그리고 스택 운전 내용을 요약하여 소개하고자 한다.

• 한국태양에너지학회 논문집
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• 제31권1호
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• pp.8-14
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• 2011

Recently, a number of large-scale photovoltaic(PV) power generation system has been installed all over the world. Thus, in order to improve the system efficiency, the optimal design of the large-scale PV systems has become an important issue. DC cable loss of PV array is one of the design factors related to the system efficiency. This paper introduces the array design method of a 500kW Photovoltaic power plant. Three types of the PV array are suggested. Also, string cables, sub-array cables and array cables are designed within 1% of voltage drop in the line, and the DC cable losses are analyzed. The results of this paper show that the DC cable loss of large-scale PV array can be reduced by adopting a proper sub-array design method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 A
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• pp.100-103
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• 1997

Korea Electric Power Corporation (KEPCO) started a fuel cell project to develop alternative sources of electric power because of the rapid increase in power demand and global environmental problems. For the development of a molten carbonate fuel cell (MCFC), KEPCO started the project in 1993 to develop a 2 kW MCFC system and finished it at the end of 1996. In this project, $ASPEN^+$ was utilized to design the 2 kW MCFC generation system. Based on this simulation, a power generation system was designed and installed for operation and a long term test of internally manifolded 2 kW class MCFC stack. This stack has 20 cells with an effective electrode area of $1000\;cm^2$. It was run at 0.84 V and $150\;mA/cm^2$ and was operated for more than 3,250 hours continuously. This paper describes the system configuration and its control and measurement units. An analysis of the stack performance, the effect of gas utilization ratio, and the stack performance requirements are also discussed.

• 대한산업공학회지
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• 제40권2호
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• pp.163-171
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• 2014

Epidemic models are used to analyze the spreading of epidemic diseases, estimate public health needs, and assess the effectiveness of mitigation strategies. Modeling scope of an epidemic model ranges from the regional scale to national and global scale. Most of the epidemic models developed in Korea are at the national scale using the equation-based model. While these models are useful for designing and evaluating national public health policies, they do not provide sufficient details. As an alternative, individual-based models at the regional scale are often used to describe disease spreading, so that various mitigation strategies can be designed and tested. This paper presents an individual-based epidemic spreading model at regional scale. This model incorporates 2005 census data to build the synthetic population in the model representing Daejeon in 2005. The model's capability is demonstrated by an example where we assess the effectiveness of several mitigation strategies using the model.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 제36회 하계학술대회 논문집 B
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• pp.1681-1683
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• 2005

The molten carbonate fuel tell(MCFC) is endowed with the high potential especially in future electric power generation industry by its own outstanding characteristics. KEPCO(KEPRI) started a 100 kW MCFC system development program in 1993 and has been executed 100kW system develpilot plant successfully completed first phaseopment by 2005 on the basis of successful results of 25kW system development. In this program, the components and mechanical structure for 100 kW stack and system construction were completed on last year and now system pre-commissioning was being executed. A 100 kW MCFC power plant was constructed at the site of Boryeong Thermal Power Plant. A 100 kW MCFC system has characterized as a high pressure operation mode, $CO_2$ recycle, and externally reforming power generation system. The 100 kW MCFC system consisted with stacks which was made by two 50 kW sub-stacks, 90 cells with 6,000 cm2 active area and BOP including a reformer, a recycle blower, a catalytic burner, an inverter, and etc. The system will be operated under 3 atm pressure condition and expected to last over 5,000 hours by the end of this year.

• 한국임상수의학회지
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• 제24권3호
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• pp.449-452
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• 2007

A 2 year-old intact male Shih-tzu dog was presented with a history of snakebite on the left upper lip. He was depressed and had swelling, erythema and pain around the left muzzle. Both mandibular lymph nodes were swollen. Fang marks were not clear, but there were scratch wounds and prolonged bleeding. Hemogram revealed neither thrombocytopenia nor echinocytosis. Increased CK value in serum chemistry and myoglobinuria in urine analysis meant muscle injury. With careful monitoring, fluid, corticosteroid, antihistamine and antibiotics were administered. After the application of ice pack and suction, local symptoms changed for the worse. However, any other systemic disorders were not identified. After 5 days, the facial swelling had resolved completely.

• 대한임상독성학회지
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• 제15권1호
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• pp.1-10
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• 2017

Purpose: This study was conducted to identify predictors of serious poisoning in patients with snake bite based on initial findings. Methods: We conducted a retrospective study of patients with snake bite who were treated at the emergency department between January 2010 and December 2016. The patients were divided into two groups according to the severity of symptoms based on the traditional snakebite severity grading scale. The mild poisoning group (MP) was classified as those who had a grade I snakebite severity during the hospital stay, and the severe poisoning group (SP) was classified as patients who had grade I at the time of admission, but progressed to grade II-IV during hospitalization. Initial clinical manifestations and laboratory findings of the two groups were compared. Results: Bite to hospital time intervals of SP were longer than those of MP (p=0.034), and the local effect score (LES) was higher in SP (p<0.001). Laboratory analyses revealed that creatine phosphokinase (p=0.044), creatine phosphokinase MB isoenzyme (CK-MB, p=0.011) and serum amylase (p=0.008) were significantly higher in SP. LES, CK-MB and serum amylase were significant prognostic predictors as indicated by univariate logistic regression analysis. Multivariate analysis revealed the following two significant predictors: LES (odds ratio=3.983, p<0.001) and serum amylase (odds ratio=1.020, p=0.017). Conclusion: In managing cases of snake bites, clinical manifestations and laboratory findings must be carefully evaluated. LES and serum amylase are predictive factors for severe poisoning, which is especially important to rapid determination of the intensive care of the patient.

• 한국임상수의학회지
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• 제26권4호
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• pp.391-394
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• 2009

왼쪽 앞다리에 교상을 입은 아시아 물왕도마뱀은 세균감염에 의해 피부 출혈, 농포, 수포, 복부팽만, 패혈증의 증상을 보인 후 폐사하였다. 신장에서 균을 분리, 생화학적 검사와 PCR 방법을 이용 모가넬라 모가니로 동정하였다. 25종의 항생제 감수성 검사를 실시하였고 분리된 균을 1.6 ${\times}$ $10^{11}$CFU/mouse 농도로 마우스 복강에 접종, 포유류에 대한 병원성을 검사하였다. 실험결과 마우스는 모두 폐사하였다.

• 콘크리트학회논문집
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• 제17권5호
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• pp.775-784
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• 2005

본 연구에서는 합리적인 내진설계기준의 정립을 위하여 철근콘크리트 교각의 내진성능에 영향을 미치는 주요 인자에 대하여 분석하였다. 기존 연구 결과에 따르면 한반도와 같은 중약진 지역에서의 철근콘크리트 교각의 심부구속철근비가 과다하게 사용되어 왔다는 결론을 내렸다. 따라서, 본 연구에서는 기존의 실험 결과들을 분석하여 합리적인 심부구속철근비를 제안하였다. 본 연구에서 제안된 심부구속철근비는 축하중비와 주철근비를 고려하였으며 낮은 축하중비에서 주철근 좌굴 방지를 위한 최소 규정을 도입하였다. 제안된 식은 일반적인 도로교상의 축하중비를 고려하면 기존 내진규정에 비해 매우 완화된 심부구속철근비를 갖게 된다. 따라서 문제로 나타나고 있는 시공성과 경제성이 상당히 향상될 수 있으리라 판단된다.