• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제20권2호
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• pp.79-86
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• 2017

Purpose: Congenital esophageal atresia (CES) is a rare congenital disease. The severity of symptoms is variable; thus, diagnosis is difficult and tends to be delayed. CES is frequently accompanied by esophageal atresia (EA) with/without tracheoesophageal fistula (TEF). We investigated the characteristics of CES by reviewing our experience with CES patients and researched the differences between CES with EA-TEF and isolated CES. Methods: A total of 31 patients underwent operations for CES were reviewed retrospectively. The patients were divided into two groups according to the association with EA-TEF, and compared the differences. Results: Sixteen boys and 15 girls were included. The mean age at symptom onset was 8 months old, and the mean age at diagnosis was 21 months old. Nine patients with EA-TEF were included group A, whereas the other 22 patients were assigned to group B. There were no differences in sex, gestational age, associated anomalies and pathologic results between the groups. In group A, the age at diagnosis and age at surgery were younger than in group B despite the age at symptom occurrence being similar. Postoperative complications occurred only in group A. Conclusion: In this study, symptoms occurred during the weaning period, and vomiting was the most frequent symptom. CES patients with EA-TEF tended to be diagnosed and treated earlier despite the age at symptom occurrence being similar. CES patients with EA-TEF had more postoperative complications; therefore, greater attention should be paid during the postoperative period.

• 한국멀티미디어학회논문지
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• 제23권9호
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• pp.1171-1180
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• 2020

The number of the PV systems installed in south korea has been gradually increasing. Interest of operation & management of PV System is rising up as PV System installation trends to increase. The vital function of operation & management is the monitoring system. Most monitoring systems are only available for equipment of suppliers and manufacturers. In this study, a monitoring system was implemented to support multi-domain equipment (inverter, junction box, water distribution board, environmental sensors) that are not limited to specific manufacturers. Monitoring system includes a visualization function, which makes it easy for users to check the power generation and the operation status of the equipment of PV System. In the future, this monitoring system will be utilized as an operation & maintenance foundation element in the PV system industry.

• 한국균학회지
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• 제46권2호
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• pp.186-192
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• 2018

PCR 기술을 이용하여 고추와 토마토의 탄저병을 일으키는 Colletotrichum coccodes 균을 빠르고 정확하게 검출하는 방법을 개발하였다. Colletotrichum 13종 22개 균주로 부터 translation elongation factor 1 alpha 유전자를 분석하여 C. coccodes에 특이적인 coccoTef-F/cocco Tef-R primer set를 제작하였다. 제작된 primer를 사용한 결과 일반 PCR 방법으로 10 ng, real-time PCR 방법으로는 10 pg 수준에서 C. coccodes가 특이적으로 검출이 가능하였다. 인공적으로 C. coccodes에 감염시킨 고추와 토마토 종자에서도 일반 PCR 방법과 real-time PCR 방법 모두 C. coccodes검출이 가능하였다. 본 연구에서 개발한 PCR 방법은 수출입되는 종자에서 신속하고 정확하게 탄저병균 C. coccodes를 특이적으로 검출하는데 활용될 수 있을 것이다.

• Current Research on Agriculture and Life Sciences
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• 제31권4호
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• pp.245-249
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• 2013

In 2008, leaf blight symptoms were observed on several Chinese chive farms in Sangju. The Pathogenicity of the isolate was confirmed by artificial inoculation, where the pathogen exhibited a strong pathogenicity toward healthy plants. Morphological classification identified the isolate as from the Fusarium genus. For further analysis, PCR and phylogenetic classification were performed with ITS region and 28S rRNA gene which are commonly used for fungal identification. However, the results provided a poor resolution. To solve this problem, we analyzed translation elongation factor 1-alpha (TEF-$1{\alpha}$) gene. The analyzed results using TEF-$1{\alpha}$ gene indicated that the isolate was F. proliferatum. Therefore, it is assumed that TEF-$1{\alpha}$ gene is important when Fusarium sp. was identified using molecular classification method.

• 대한기관식도과학회지
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• 제19권1호
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• pp.25-27
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• 2013

A 47-year-old man was referred for TEF. He underwent tracheostomy three months ago to maintain prolonged ventilator care. Computed tomography (CT) scan and fiberoptic examination showed bilateral vocal cord palsy with median fixation and about 2 inch sized long segmental tracheoesophageal fistula (TEF) tract along the necrotic cricoid and tracheal cartilages. Narrow field total laryngectomy was performed to remove devitalized cartilages and mucosa, and repair TEF. He discharged without complication except mild stenotic change of tracheal fenestration 19 days later.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.449-450
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• 2007

본 논문에서는 과도안정도 문제 발생 시, 외란이 계통에 미치는 영향을 최소화할 수 있는 효과적인 제어 방법을 다룬다. 전력계통의 과도안정도는 외란에 의해 야기되는데, 이 외란의 영향을 받아 동기성을 잃고 가속하는 발전기들이 과도에너지를 계통에 유입시킨다. 따라서 가속하는 발전기들 중 일부를 제거하여 계통으로 유입되는 과도에너지를 줄이고 계통을 새로운 정상상태로 만들고자하는 것이 본 논문의 주된 내용이다. TEF 프로그램을 통하여 발전기 제거 시간과 계통의 안정성과의 관계를 다루고, 이를 PSS/E를 이용하여 검증한다. 실제 계통에서의 선로제거나 발전기 또는 부하 탈락은 0.1초로 가정하여 사례연구를 실행하였으며, 계통사고는 삼상 단락 사고로 하였다.

• Environmental Analysis Health and Toxicology
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• 제14권3호
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• pp.103-111
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• 1999

To effectively predict the lipophilicity, the aryl hydrocarbon receptor (AhR) affinity, and TEF (Toxic equivalency factor) of dioxins by geometrical descriptors, the multiple linear regression methods with the forward selection and backward elimination were employed with statistical validity. The lipophilicity, the Ah receptor binding affinity, and the toxic equivalency factor of dioxins could be predicted using some geometrical descriptors.

• Journal of Chest Surgery
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• 제52권3호
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• pp.170-173
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• 2019

A rare case of esophageal atresia/tracheo-esophageal fistula (EA-TEF) with an associated tracheobronchial remnant (TBR) is reported and discussed herein. A 13-month-old patient was seen with a complaint of vomiting of solid food 1 year after EA-TEF repair. An esophagogram showed a tapered narrowing in the lower segment of the esophagus. A re-operation was carried out and a pathologic examination of the resected stenotic segment revealed the presence of a TBR.

• 한국멀티미디어학회논문지
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• 제23권10호
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• pp.1307-1317
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• 2020

In recent years, the PV plant is gradually increasing in korea and has begun to focus on PV system O&M(Operation and Management). The legacy PV system can hardly be gathering realtime information. That is why it is difficult for the facility to respond immediately to situations in which problems arise. This leads to economic losses due to reduced power generation. In this study, we implemented an RMC(Remote Maintenance Control) gateway that supports multi-area equipment(inverters, junction boxes, switchboards, environmental sensors) that are not limited to specific manufacturers. It provides a function to visualize the collected data. Users can easily check the power generation and operation status of PV system equipment. In the future, we will develop an algorithm capable of analyzing beta factors that cause equipment performance degradation, parts aging, and deterioration using data collected from facilities. We intend to use this algorithm as a fundamental technology for O&M by transplanting it to the RMC gateway.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1992년도 하계학술대회 논문집 A
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• pp.153-156
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• 1992

Transient stability analysis of Korea Electric power Corporation(KEPCO) system is conducted by time simulation method, and the method is robust and reliable. But, time simulation consumes enormous computing resources and engineering time, and it does not provide a measure of the degree of stability of the system. Therefore, this method does not apply to every changed condition appropriately and quickly in planning and operating. And Transient Energy Function (TEF) method whis can assess quickly and quantatively the degree of stability of the system and which judges the stability and the instability to analyse transient dynamic charater of the system by mutual changing kinetic energy and potential energy, is developed. TEF method analyses the first Swing transient stability of the system by using the thought that if after disturbance happening, the increase of all the rotator kinetic energy changes into the potential energy after diturbance clearing, the system is stable, otherwise the system is unstable. This paper represents the availabiIity of the TEF method by comparing with time simulation method on the two cases.