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6.6 kV 케이블의 절연저항 측정을 위한 부하전류 및 온도 측정
박용규,조영식,이관우,엄기홍,박대희,Park, Yong-Kyu,Cho, Young-Seek,Lee, Kwan-Woo,Um, Kee-Hong,Park, Dae-Hee 한국전기전자재료학회 2015 전기전자재료학회논문지 Vol.28 No.1
The cable degradation process is largely divided into three steps; Step 1 : Thermal degradation, Step 2 : Weibull degradation, Step 3 : Partial discharge. it is progress in step order. This article aims to explain the process of cable degradation using the method of insulation resistance and accordingly to compose and manufacture a system of measuring the life of electrical cable. Before measuring the insulation resistance, a system of measuring the temperature and current of cables was made, and the established system was installed for test on the site of a power plant to collect the measured data. The current sensor was used TFC30P80A-CL420, and temperature sensor was used the DK-1270 PT100 sensor as RTD sensor. When measured the temperature and the load current at the same position, was confirmed that in case of the load current value was high, also temperature value high. Therefore, the correlation between load currents and temperature was verified, and the analysis of diagnostic data was evaluated, which could be utilized in identifying the fault condition of cable systems.
전력케이블의 열화측정을 위한 부하전류 및 온도측정 시스템
박용규(Yong-Kyu Park),조영식(Young-Seek Cho),이관우(Kwan-Woo Lee),엄기홍(Kee-Hong Um),박대희(Dae-Hee Park) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.2
Recently, there has been a surge in interest in equipment diagnosis and monitoring technology from the perspective of providing quality electricity in terms of reliability and safety. In order to meet the electrical demands of consumers, reliability of power supply needs to be maintained. For this purpose, a monitoring system for power cable is very important. Since real?time measuring equipment has many advantages, it is highly applicable. By measuring the load current and the surface temperature of power cables, we have monitored and identified the deterioration phenomena of power cables in operation. Since direct measurement of the cable conductor temperature is not easy, we have measured the surface temperature instead, and converted that temperature to obtain the conductor temperature of the cables. In addition, we have designed a system to detect the deterioration processes of the power cables in operation.
ST분절 상승 심근경색증 환자에서 시간 지연이 사망률에 미치는 영향
박용규 ( Yong Kyu Park ),정진옥 ( Jin Ok Jeong ),박재호 ( Jae Ho Park ),이현석 ( Hyeon Seok Lee ),이영달 ( Young Dal Lee ),최웅림 ( Ung Lim Choi ),진선아 ( Sun Ah Jin ),신성균 ( Sung Kyun Sin ),김준형 ( Jun Hyung Kim ),박재형 ( Ja 대한내과학회 2011 대한내과학회지 Vol.81 No.2
Background/Aims: The delay between the onset of myocardial infarction symptoms and primary percutaneous coronary intervention (PCI) is an important prognostic factor in patients with ST-segment elevation acute myocardial infarction (STEMI).We reviewed this delay in patients with STEMI and analyzed clinical outcomes. Methods: The study enrolled 3,399 patients (age, 61.4±12.8 years; 25.6% women) with STEMI who underwent primary PCIwithin 12 hours of symptom onset between October 2005 and February 2008 from the Korea Acute Myocardial Infarction Registry.The patients were divided into two groups according to the symptom-to-balloon time: group I (≤ 3 hours, n=955) and group II (>3 hours, n=2444). The in-hospital mortality rates and 1-year mortality and major adverse cardiac event (MACE) rates werecompared between the two groups. Results: The mean time interval from the onset of symptoms to arrival at the emergency room (ER) was 188.0±133.6 minutes(median, 152 minutes). The mean time interval from the ER to reperfusion (door-to-balloon time) was 97.8±67.9 minutes (median,80 minutes). The mean time interval from the onset of symptoms to reperfusion (symptom-to-balloon time) was 285.8±146.2minutes (median 250 minutes). The in-hospital mortality rate was significantly lower in group I as compared with group II (3.6%versus 5.2%, p=0.044). The 1-year mortality rate was also significantly lower in group I (4.7% versus 7.2%, p=0.012), while the1-year MACE rate was not significantly different between groups (17.9% versus 20.4%, p=0.179). Conclusions: This study demonstrates that there is a significant pre-hospital time delay in patients with STEMI in Korea and this time delay is associated with increased 1-year mortality. (Korean J Med 2011;81:199-207)
박용규(Young-Kyu Park),박제강(Je-Kang Park),온한익(Han-Ik On),강동중(Dong-Joong Kang) 제어로봇시스템학회 2015 제어·로봇·시스템학회 논문지 Vol.21 No.11
This paper proposes a method for detecting the front side of vehicles. The method can find the car side with a license plate even with complicated and cluttered backgrounds. A convolutional neural network (CNN) is used to solve the detection problem as a unified framework combining feature detection, classification, searching, and localization estimation and improve the reliability of the system with simplicity of usage. The proposed CNN structure avoids sliding window search to find the locations of vehicles and reduces the computing time to achieve real-time processing. Multiple responses of the network for vehicle position are further processed by a weighted clustering and probabilistic threshold decision method. Experiments using real images in parking lots show the reliability of the method.
Interleukin-1$\beta$ 및 Interleukin-1 Receptor Antagonist의 유전적 다형성과 한국인 위암과의 연관 관계
박직영,조용구,김창재,박용규,김영실,박조현,이석형,유남진,이정용,박원상,Park Jik Young,Cho Young Gu,Kim Chang Jae,Park Yong Kyu,Kim Young Sil,Park Cho Hyun,Lee Sug Hyung,Yoo Nam Jin,Lee Jung Young,Park Won Sang 대한위암학회 2002 대한위암학회지 Vol.2 No.3
Purpose: Interleukin 1$\beta$ (IL-1$\beta$) polymorphisms are associated with hypochlorhydria, atrophic gastritis, and increased risk of gastric cancer in Caucasians. We tried to determine whether the IL-1.. and IL-1 receptor antagonist (IL-1 RN) genetic polymorphisms contribute to the development of gastric cancer and the specific type of gastritis in Korean. Materials and Methods: The study population was comprised of 128 gastric cancer patients with histologically proven carcinoma and 63 normal healthy individuals. Sixty-eight carcinomas were of intestinal-type and sixty tumors were of diffuse-type. No patient had a familial gastric cancer history. The 511 bp and 31 bp polymorphisms in the IL-1.. were genotyped by polymerase chain reaction (PCR)-restriction fragment length polymorphism. The polymorphism of the IL-1 RN was analyzed with variable number tandem repeat after PCR. Results: The genotype of 511C/-31T of IL-1$\beta$ and allele 1 of IL-1 RN was dominant in the present subjects. The allelic frequencies of the C allele IL-1$\beta$, which is a high risk genotype for gastric cancer, were 0.551 and 0.429 in gastric cancer and normal controls, respectively. Statistically, significant difference in allelic frequencies of three polymorphic sites between gastric cancer patients and normal controls, and between intestinal-type and diffuse-type was not observed. Conclusions: These results suggest that the polymorphisms of IL-1$\beta$ and IL-1 RN may not contribute to the development of Korean gastric caner and that other endogenous or exogenous factors will be important for gastric carcinogenesis.
해안인접지역 기초 구조물콘크리트의 내염해 성능 평가 -건축구조기준과의 성능비교-
박용규 ( Park Yong-kyu ),윤기원 ( Yoon Gi-won ),김현우 ( Kim Hyun-woo ),김용로 ( Kim Yong-ro ),송영찬 ( Song Young-chan ) 한국건축시공학회 2016 한국건축시공학회 학술발표대회 논문집 Vol.16 No.2
In this paper, the increase in chloride resistance of footing concrete at coastal area was evaluated by replacement of Mineral Admixture. In KBC 2009, the footing concrete`s minimum specific concrete strength at coastal area is determined to 35MPa. However, this is criteria only based on the strength aspect. Thus, it is not considered to increase the chloride resistance by replacement of Mineral Admixture. According to the test results of chloride ions penetration resistance, 35MPa class concrete with OPC 100% shown inaccessible state. Low-strength (24~30MPa class) concretes with Mineral Admixture, however, presented better performances. In addition, chloride diffusion coefficient tests showed identical appearance. Therefore, the current KBC`s chloride resistance criteria based on only concrete strength has to review for the reason it can cause many problems (ex. cost increases by growing concrete strength and the environmental issues by a lot of cement use).