• 한국철도학회논문집
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• 제17권2호
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• pp.94-99
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• 2014

최근의 신 교통시스템 개발 동향은 주로 지속가능하고 친환경적인 교통수단을 제공하는데 초점이 맞춰져 있다. 그 중에서도, 수요응답형 순환교통(PRT: Personal Rapid Transit) 시스템은 그 가능성 때문에 주목을 받고 있으며, 첨단 전기 자동차(EV) 개발 기술과의 융합을 통해서 경쟁력은 보다 향상되고 있다. 하지만 전기 배터리에 의해 구동되는 차량의 경우 안정적이고 효율적인 운영의 측면에서 기술적인 어려움에 직면하고 있다. 본 논문에서는, 기술적인 난제를 극복하고 전기에너지를 기반으로 한 교통수단의 보급을 증대하기 위하여 태양전지에 의한 보조 전력 공급을 위한 설계적 접근방법에 대해서 모형실험을 통해서 논한다. 그 결과, 실제 차량에 적용했을 시 보조 전원 공급장치로서 일부 서비스 기기에 소요되는 전력량의 대략 11% 정도를 감당할 수 있을 것으로 예측되었다. 특히, 유연소재 태양전지의 장점은 저렴하고 가벼우며 디자인 의도를 최대한 살릴 수 있다는 데 있다. 무엇보다도 유연함과 용이한 부착성은 다양한 분야에서의 확대 적용 가능성을 보여준다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2011년도 제42회 하계학술대회
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• pp.2200-2201
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• 2011

DC railway systems have been adopted in the urban rail train. When EMU decelerates using electric breaking, regenerative power occurs. extra power is forcibly wasted by resisterIf DC transit system has inverter for reusing regenerative power, energy efficiency in DC transit system will be increased. in this paper present developed regenerative power inverter and its field test result.

• 한국철도학회논문집
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• 제16권2호
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• pp.129-137
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• 2013

본 연구는 최근 도시개발에 있어 관심사로 대두되고 있는 대중교통지향형 개발(TOD)에 대한 바람직한 개발방향을 모색하고, 서울시 역세권을 환승특성 유형별로 구분하여 실증분석을 통해 이에 대한 분석결과를 제시하는데 목적을 두고 수행하였다. 대중교통 이용자 특성에 미치는 영향력은 환승특성 유형별로 차이가 있는 것으로 규명 되었다. 향후 수도권의 대중교통전략 수집 시 차별화된 영향요소를 기반으로 개선(안)을 도출하는 것이 필요하며, 향후 지속적인 대중교통 이용수요 증진을 위한 기초를 마련해야 한다고 판단된다. 또한 지하철역과 직접적인 연계를 하기 보다는 보조적인 수단으로 버스전용차로(BRT)를 적절하게 연계하여 현재 단일역세권을 거점화하는 것이 필요하다고 판단된다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1181-1182
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• 2007

Light Rail Transit (LRT) System is an urban transit system which has approximately an intermediate transportation capacity between conventional subway and bus ($5,000{\sim}25,000$ persons per hour and per direction). It is a high-tech system which operational capacity, punctuality and mobility are remarkably improved. There are some types of LRT systems such as monorail, tramway, AGT(Automated Guideway Transit), and so on. The LRT systems have been applied and being operated in about a hundred lines around the world and many projects that apply the LRT systems in Korea are being proceeded and scheduled. For the efficient management, economical construction, and safe operation of various LRT systems, the establishment of national standard is necessary such as vehicle standardized specification, vehicle performance test standard, vehicle safety standard, construction guide, operation regulation, etc. of LRT systems. This paper presents the standard specification of electrical equipment of linear induction motor type light rail vehicle, that is LIM AGT(AGT system propelled with linear induction motor) vehicle. The LIM AGT system has been applied in Japan subway and ART(Advanced Rapid Transit) system of Canada and Yongin LRT is currently under construction.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1183-1184
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• 2007

Light Rail Transit (LRT) is optimized vehicle system for complex urban circumstance. LRT systems have many merits such as improved accuracy and safety. There are many LRT systems such as monorail, tram, automated guideway transit, linear induction motor propulsion and so on. These systems have been operated in Japan and other advanced countries. In Korea, local government has many projects to apply the advanced LRT system. But there are no standards regulation, performance test regulation and construction regulation for monorail system, linear induction motor system and tram in Korea. We expect that standardization brings economical construction and safety. The linear induction motor system has been usually applied to subway in Japan and ART(Advanced Rapid Transit) in Canada. In Korea, the linear induction motor system has been adopted for Yong-In LRT and currently under construction. This paper presents signalling system and TCMS(train control and monitoring system) of linear induction motor system.

• 대한핵의학회지
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• 제29권1호
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• pp.61-72
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• 1995

The author performed radionuclide esophageal transit studies(RETS) with liquid and solid boluses using the same day protocol in 90 normal controls and 164 patients with various primary esophageal motility disorders who were diagnosed by manometric criteria and clinical courses. The authors calculated mean esophageal transit time(MTT) and mean residual retention(MRR) in each of the liquid and solid studies, and classified time-activity curve(TAC) patterns. The normal criteria of RETS with liquid bolus were MTT<24 sec, MRR<9%, and the TAC pattern that showed rapid declining slope and flat low residual(Type 1). The normal criteria of RETS with solid bolus were MTT<35 sec, MRR<9% and TAC of type 1. With these normal criteria, the sensitivity and the specificity of the liquid study were 62.2 % and 97.8%, respectively. The sensitivity increased to 75.4% with the solid study. The author also found that the RETS was highly reproducible. The achalasia typically showed no effective emptying of both liquid and solid boluses during the whole study period, and was well differentiated by its extremely long transit time and high retention from the other motility disorders. The diffuse esophageal spasm (DES) and nonspecific esophageal motility disorder(NEMD) showed intermediate delay in transit time and increased retention. In the groups of hypertensive lower esophageal sphincter(LES), hypotensive LES and nutcracker, there noted no significant difference with the normal control group in terms of MTT and MRR. The DES and NEMD could be more easily identified by solid studies that showed more marked delay in MTT and increased MRR as compared with the liquid study. In conclusion, esophageal scintigraphy is a safe, noninvasive and physiologic method for the evaluation of esophageal emptying.

• 한국구조물진단유지관리공학회지
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• 제17권1호
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• pp.20-29
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• 2013

• 한국도로학회:학술대회논문집
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• 한국도로학회 2011년 춘계학술대회 논문집
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• pp.243-251
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• 2011

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.244-246
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• 2007

본 논문에서는 완전 자동화된 개인고속이동 시스템의 원활한 차량운행 제어를 위한 운행속도 패턴과 차량간의 충돌을 방지하기 위한 알고리즘의 설계 및 설계된 알고리즘의 검증을 위한 하드웨어 구성에 대해서 다룬다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1990년도 PROCEEDINGS OF THE FIRST KOREA-JAPAN JOINT GEOTECHNICAL SEMINAR ON EXCAVATION and TUNNELING IN URBAN AREAS
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• pp.69-86
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• 1990

This paper discusses how to protect the principal structures adjacent to subway tunnels being constructed by the shield or cut-and-cover methods by referring to some actual examples.