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안태기(Tae-Ki Ahn),이수길(Su-Gil Lee),한성호(Seong-Ho Han),이관섭(Kwan-Sub Lee) 한국철도학회 2000 철도저널 Vol.3 No.3
The automatic/driverless operation which are great important techniques in metro railway are required to increase higher safety, greater reliability, and transport capacity. To satisfy such demands, we must have the system design and testing technique for the railway system operation. These techniques are related to the onboard train control and communication systems which include TCMS(Train Control and Monitoring System), ATO(Automatic Train Operation), ATC(Automatic Train Control), and TWC(Train to Wayside Communication). These sub-systems must be interfacing with not only each others but also the signal system on the ground. We tested the train control system on Test line that has been developed on the basis of the standardized type EMU for korea railway systems. This test line which is located in Sangju, have been constructed for testing 7 & 8 line of Seoul Metro railway.
EC 기준 순환식 파프리카 수경재배에서 시간 경과 및 배액율에 따른 이온농도 변화 분석
안태인(Tae In Ahn),신종화(Jong Wha Shin),손정익(Jung Eek Son) (사)한국생물환경조절학회 2010 시설원예‧식물공장 Vol.19 No.4
EC 기준 순환식 양액재배에서 식물의 양분 흡수와 배액율은 재사용 양액 내의 이온 비율과 농도에 영향을 미친다. 본 연구는 파프리카(Capsicum annum L. ‘Boogie’)의 EC 기준 순환식 양액재배에서 시간과 배액율에 따른 이온 농도의 변화를 분석하기 위해 수행하였다. 첫 번째 실험에서 수집된 배액을 EC 2.2dSㆍm?¹로 조정하고 새로 조성한 양액과 혼합하여 재사용 하고 주기적으로 샘플링 하여 이온의 농도를 분석하였다. 두 번째 실험은 7%, 16%, 39%, 51%의 배액율을 적용하고 배액과 배액을 원수로 희석하고 새로 조성한 양액과 혼합하였을 때의 EC 변화와 이온 농도를 분석하고 비교하였다. 재사용 양액에서의 K? : Ca²?와 SO₄²? : NO₃?와 같은 이온 간의 비율 변화를 조사하였다. 첫 번째 실험에서의 이온 농도의 변화 범위는 각각 K? 1.13, Ca²? 5.35, Mg²? 0.92, NO₃? 0.9 SO₄²? 1.10, PO₄³? 0.19meqㆍL?¹이었다. 이온 간의 비율 변화는 양 이온에서는 주로 K? : Ca²?을 중심으로 음이온에서는 NO₃? : SO₄²?을 중심으로 나타났다. 두 번째 실험에서 배액율에 따른 배액의 배액율이 증가함에 따라 점차 감소하는 경향을 나타냈다. 배액 내 각 이온의 농도도 배액율의 증가에 따른 감소 경향을 보였다. 배액율에 따른 배액 내 이온 간의 비율 변화에는 차이가 없었다. 그러나 배액을 희석하고 새로 조성한 양액과 혼합함에 따라 교정 효과에 차이가 나타났다. 7%의 배액율이 새 양액의 이온 비율에 가장 근접하였으며, 16%, 51% 39% 순으로 교정되었다. 교정에 따른 이온 비율 변화는 K? : Ca²?와 NO³?와 PO₄³?를 중심으로 나타났다. Nutrient uptake by plants and drainage ratio in culture beds can affect ion balance and concentrations of nutrient solutions in electrical conductivity (EC)-based closed-loop soilless culture. This study was conducted to analyze ion concentration changes with time and drainage ratio under EC-based nutrient control in closed-loop soilless culture for sweet pepper plants (Capsicum annum L. 'Boogie'). At first experiment, ion concentrations of the nutrient solution were periodically analysed while collected drainage was being reused by mixing with fresh nutrient solution at a dilution rate of EC 2.2 dSm?¹. Changes in ion concentrations of K?, Ca²?, Mg²?, NO₃?, SO₄²?, and PO₄³? were 1.13, 5.35, 0.92, 0.9, 1.10, 0.19 meqㆍL?¹, respectively. Ion balance such as K?: Ca²? and SO₄²?: NO₃? were mainly affected during the recirculation of nutrient solution. At second experiment, ion concentrations and EC of drainage were compared before and after replenishment under different four drainage ratios of 7%, 16%, 39%, and 51%. Ion ratios of the recirculated nutrient solutions such as K? : Ca²? for cation and SO₄²? : NO₃? for anion were investigated. ECs of drainage decreased with increase of drainage ratio and each ion concentration showed the same trends as EC did. Ion balances in drainage with drainage ratio were a little different from each other, but each ratio could be corrected by replenishment process. The ion balance at 7% drainage ratio was closest to initial ratio and followed by 16%, 51%, and 39% in the order. Ion balance such as K? : Ca²? and NO₃? : PO₄³? were mainly affected the correction process.
ALBA: 탈식민성과 선물주기 방식의 라틴아메리카 통합운동
안태한 ( Tae Hwan Ahn ) 한국스페인어문학회 2011 스페인어문학 Vol.0 No.59
Durante la segunda mitad del siglo XIX, los blancos criollos establecieron los regimenes de estado-nacion moderna con la colonialidad(exclusion) interna de los indigenas y negros. Despues de los anos 90, han aparecido los movimientos sociales de emancipacion social de los otros asi como indigenas, negros, mujeres, agricultores sin tierra, pobres buscando la globalizacion alternativa. Para guardar esta vision de que otro mundo sea posible, los movimientos sociales latinoamericanos se dieron cuenta de la importancia de los movimientos de integracion latinoamericana y con el liderazgo de Chavez la materializaron poco a poco incluso con la participacion activa de Brasil y la Argentina. Estos paises se acercaron dentro del ambito de Mercosur con la conciencia de importancia politico-estrategica de integracion latinoamericana promovida por Venezuela en el area energetica y de infraestructura. Y aparecio ALBA. ALBA es un acuerdo singular de integracion latinoamericana no al nivel de capital sino al del pueblo. Porque ya no se trata de la lucha de clases sino de elite/pueblo. Con el protagonismo del pueblo en los movimientos sociales y de integracion, se ha regresado lo pu?blico o politico en la America Latina. Las activas politicas de integracion latinoamericana hacia los derechos basicos asi como la educacion y la salud de ALBA no se pueden realizar sin el surgimiento de la emacipacion de los indigenas y negros. Por tanto, las utopias sumergidas en los cuerpos del pueblo latinoamericano indican el sistema de integracion de ``igualdad de las diferencias`` sin la jerarquizacion vertical racial con la superacion del desarrollismo moderno de la epistemologia eurocentrica.
안태기(Ahn Tae Ki),신정렬(Shin Jeong Ryol),박기준(Park Kee Jun),정종덕(Chung Jong Deok) 한국철도학회 2006 한국철도학회 학술발표대회논문집 Vol.- No.-
Since the most part of maintenance work for EMU depends on the worker"s know-how, the quality of maintenance is different according to the worker"s skill and experience. Especially EMU is composed of the various parts such as electrics, electronics, communication, signal, and machinery, etc., and performs its function by their organic work. Therefore it is very difficult to improve the quality of maintenance for EMU. In this paper we purpose how to change the know-how-based maintenance method to knowledge-based maintenance method. Consequently we can ensure the quality of maintenance for EMU, and improve the quality by continuous maintaining the knowledge.