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수동운전방식에서의 PSD 출입문 신호반응 시간 개선 방안 연구
이무호(Lee moo ho),김찬겸(Kim chan cum),이석종(Lee suk jong),이수영(Lee soo young) 한국철도학회 2008 한국철도학회 학술발표대회논문집 Vol.- No.-
Platform Screen Door(PSD) has been installed and operated at seoul subway line 1~4 in the manual train operation mode(ATS/ATC) by SeoulMetro since 2005. SeoulMetro uses the wireless (RF) communication system and the train door detection system for the link between the train and PSD doors opening/closing motion in the manual train operation mode. For the convenience and safety of passengers, the train doors and the PSD doors opening/closing shall be synchronized as much as possible. In ATO(Automatic Train Operation) mode which provides the interface between train control system and PSD system, ATO signaling system makes the train doors and PSD doors open/close command signals systematically, so PSD doors can be opened/closed almost simultaneously with the train doors. But, in the manual train control(ATS/ATC) mode, PSD system needs to detect the train doors open/close operation and make PSD open/close command signals to actuate PSD doors. These PSD open/close commanding process cause time delay of PSD doors opening/closing motion in response to the train doors opening/closing motion. Sometimes the response delay time can be over 1 second, which is not proper to operate PSD, and need to be reduced This paper presents the reduction method of the PSD response delay time to improve the convenience and safety of passengers.
바이패스용 3-Way 밸브를 장착한 온수 난방시스템의 압력 및 유량 특성 평가
허전(Jurn Hur),이석종(Suk-Jong Lee),성재용(Jae-Yong Sung),이명호(Myeong Ho Lee),윤재동(Jai Dong Yoon) 대한설비공학회 2007 설비공학 논문집 Vol.19 No.3
A 3-way valve has been applied to a distributor in a hot-water heating system and the performance of the system was evaluated in view of the variations of pressure drop and flow rate. The 3-way valve has been designed to bypass overplus hot-water when a control valve is closed. Note that the flow goes through heating pipeline in normal operation. In the present study, the measured pressure drops in each part of the flow paths show that the contribution to the total pressure drop is in the order of the supply header with control valves, piping system of each room and return header of the distributor, even though the amount of it is different according to the flow paths. As a result of performance test by sequential closing of the control valves, the variations of pressure drop and flow rate in the distributor with 3-way valves is much lower than those with previous 2-way valves, which prevent noises induced by pressure fluctuations.
Fuzzy Linearity of the Seminormed Fuzzy Integrals of Interval-valued Functions
김미혜(Mi-Hye Kim),김미숙(Mi-Suk Kim),이석종(Seok Jong Lee) 한국지능시스템학회 2004 한국지능시스템학회논문지 Vol.14 No.3
일반적으로 Lebesgue 적분에서 성립하지만 퍼지적분에서 성립되지 않는 성질이 몇 가지 있다. 그 중 하나가 선형성이다. 본 논문에서는 선형성 표현식에서 덧셈을 supremum 으로 곱셈을 infimum으로 대신한 퍼지선형성의 정의를 소개하고 구간값을 갖는 함수의 준노름 퍼지적분이 퍼지가법성을 갖는 퍼지 측도와 연속인 준 노름이 saturated 조건을 만족할 때, [Max] 조건을 만족하는 가측함수에 대해 퍼지선형성이 성립함을 보였다. In general, the fuzzy integral lacks some important properties that Lebesgue integral possesses. One of them is linearity. In this paper, we introduce fuzzy linearity in which we use the supremum and the infimum instead of additon and scalar multiplication in the expression of linearity and show that the fuzzy linearity of the seminormed fuzzy integrals of interval-valued functions when the fuzzy measure g is fuzzy additive, the continuous t-seminorm is saturated and measurable functions satisfy the condition[Max].
피지선모반에서 Tubular Apocrine Adenoma와 Syringocystadenoma Papilliferum이 병발한 3예
임현정 ( Hyun Jung Lim ),김호연 ( Ho Youn Kim ),이석종 ( Seok Jong Lee ),김병수 ( Byung Soo Kim ),이원주 ( Weon Ju Lee ),김도원 ( Do Won Kim ),김정식 ( Jeong Shik Kim ),윤길숙 ( Ghil Suk Yoon ) 대한피부과학회 2008 대한피부과학회지 Vol.46 No.5
Both syringocystadenoma papilliferum and tubular apocrine adenoma are benign skin appendage tumors of apocrine differentiation. They may be isolated and easily discernible, but in some cases, it is difficult to differentiate them into separate entities or diseases with overlapping features. We herein report three cases showing features of both syringocystadenoma papilliferum and tubular apocrine adenoma simultaneously. They presented as a 20-year-old woman with linear verrucous erythematous plaque with grouped papules on the left sideburn area, a 64-year-old man with verrucous plaque on the right temporal scalp, a 48-year-old man with verrucous erythematous patch on the occipital scalp and commonly showed syringocystadenoma and tubular apocrine adenoma. All cases had been present since birth and also showed similar histopathologic features as follows; occasional fetal hair germ-like immature pilosebaceous structures or somewhat hypertrophied sebaceous glands directly connecting to surface epidermis, suggesting the association with nevus sebaceus in a variable degree. (Korean J Dermatol 2008;46(5):665∼669)
사마귀양혈관종과 혈관각화종: 임상병리조직학적 유사점과 차이점
정홍대 ( Hong Dae Jung ),박경덕 ( Kyung Duck Park ),지성근 ( Seong Geun Chi ),이석종 ( Seok Jong Lee ),최윤석 ( Yoon Seok Choe ),김병수 ( Byung Soo Kim ),김도원 ( Do Won Kim ),정호윤 ( Ho Yun Chung ),윤길숙 ( Ghil Suk Yoon ) 대한피부과학회 2009 大韓皮膚科學會誌 Vol.47 No.4
Background: Verrucous hemangioma (VH) and angiokeratoma (AK) are vascular birthmarks of an unclear nosology and these birthmarks commonly show a superficial hyperkeratotic vascular component. There are both similarilities and differences between VH and AK with some confusion concerning their overlapping features. Objective: This study was undertaken to review the clinicopathological features of VHs and AKs and to determine the similarilities and differences between them. Methods: We retrospectively reviewed 11 VHs and 7 AKs at the Vascular Anomaly Clinic of our hospital over the past 10 years. They were evaluated from the clinicopathologic point of view for factors such as the age of onset, location, size, symptoms, the histopathological epithelial change and involvement of deeper tissue. Results: These birthmarks share common clinical features with the exception of gender and lesion size. Histopathologically, hyperkeratosis, acanthosis and capillary dilatation in the upper dermis were commonly seen. Yet lobular proliferation and dilatation of blood vessels in the deep dermis, or more importantly, the subcutis were detected in VH only. Furthermore there was a case of VH that showed diffusely scattered increased blood vessels in the subcutis, suggesting an evolving stage of VH and there was another case of VH that was erroneously diagnosed as AK via the initial biopsy, and the final diagnosis was changed according to the excised lesion. Conclusion: The two diseases share most of their clinicopathological features, but small parts of features like gender, the clinical size and the histological deep dermis/subcutis involvement were differences. Making the correct differential diagnosis between VH and AK through a deep biopsy with appropriate timing and long term follow up and/or radiological examination is helpful to avoid erroneous management. (Korean J Dermatol 2009;47(4):419~424)