<Memorias del Subdesarrollo> y Narrar Traumas

Este artículo toma como su punto de partida y análisis el modo de narrar las traumas en Memorias del subdesarrollo que despertó a los cubanos para poder enterarse de la situacón socio-política de Cuba y de sí mismos desde la perspectiva existencialista. Las obras tanto como la de Edmundo Desnoes como la de la colaboración entre el novelista mismo y el director Gutiérrez Alea son obras brillantes como modelo ejemplar con su valor socioideológico- artístico. El mérito más esencial que tienen la novela y la película se halla en el espíritu de buscar modos de narrar traumas para superarlos. Según los psicoanalistas los traumas históricos no se superan nunca, por que las víctimas no se atreven a enfrentarse con ellos, sino prefieren olvidarlos para no recordar lo negativo de las traumas. El protagonista Sergio confiesa que no quiere tener momorias incurables. Aunque decide quedarse en la Habana, no se atreve a enfrentarse con la realidad fde Cuba. Pero, recordando su pasado y observando su alrededor, él empieza a adquirir la mirada de ver las cosas y narrarlas, así introduciendo a los lectores y espectadores el modo de ver y observar los traumas y las huellas de heridas con momorias temibles. El modo de narrar las traumas se adquiere la posibiliadad de superarlos según las miradas del protagonista Sergio, quien nos narra la vida cotidiana de la gente de su alrededor para invitarnos a contemplar lo real entre lo metafísico y lo físico.이 논문은 2008년 정부(교육과학기술부)의 재원으로 한국학술진흥재단의 지원을 받 아 수행된 연구임(KRF-2008-362-A00003)

레이저 빔 및 전기화학 복합 가공을 이용한 텅스텐 표면의 마이크로 스트럭쳐링 기술

학위논문 (박사)-- 서울대학교 대학원 : 기계항공공학부, 2016. 8. 주종남.In this dissertation, surface structuring to implement various functions was carried out by using hybrid process composed to laser beam machining and electrochemical etching. The suggested method fabricated tungsten easily which had varied applications, and achieved high productivity with fast machining speed, improved surface quality and low cost process, and thus it resolved problems of previous researches to texture tungsten. As using laser beam machining in first step, various shapes of tungsten micro patterning were pre-textured in short time. Generated recast layer and burr were formed on the original core shape that was pre-determined by laser scanning path, and thus degree of precision was low. For this reason, electrochemical etching to improve surface quality was carried out to dissolute recast layer into NaOH electrolyte, and thus pre-defined original micro pattern was revealed. In this research, guide lines to texture tungsten surface for micro channel and pin were suggested by using new micro structuring method. As combining varied laser scanning path array, fabricated shapes of structures were analyzed, and the resulted tendencies with different laser parameter were studied. Moreover, the solutions to texture vertical micro channel with over 90 °angles of slope and anisotropic angles were introduced by changing laser scanning direction and tilting procedure. The surface analysis of textured structure was achieved as control electrochemical etching time, and the etching conditions were chosen to eliminate recast layer efficiently. EDS analysis was also implemented finally, and thus the principle of the suggested micro hybrid structuring process was verified. The textured tungsten micro channel was applied to lock each other mechanically, and directional locking force was also measured. The textured tungsten micro pin was used as micro needle for delivering drug, and thus various application areas using newly introduced hybrid structuring process were suggested.1. Introduction 1 1.1 Research background 1 1.2 Research purpose 8 1.3 Dissertation overview 10 2. Principle of surface structuring 13 2.1 Laser beam machining 13 2.2 Electrochemical etching 21 2.3 Hybrid process for surface structuring 30 3. Experimental set up 34 3.1 Laser beam machining system 34 3.2 Electrochemical etching system 37 4. Surface structuring of various micro structure 40 4.1 Parameter test 41 4.2 Micro channel 64 4.3 Micro pin 106 5. Application 131 5.1 Locking 131 5.2 Needle 146 6. Conclusion 152 Reference 155 국문초록 159Docto

Microleakage of class II posterior composite resin filling using various light curing methods 구치부 광중합 복합레진 수복시 여러 광조사 방법에 따른 미세변연누출에 관한 연구

Thesis (master`s)--서울대학교 대학원 :치의학과 치과보존학전공,2001.Maste

헤드 철근의 인발강도 산정을 위한 3차원 메커니즘에 관한 연구

학위논문(석사)--서울대학교 대학원 :건축학과,2004.Maste

NITROGEN OXIDE GAS SENSOR AND METHOD FOR MEASURING NITROGEN OXIDE GAS USING THE SAME

본 발명은 일산화질소와 이산화질소의 총량을 측정하면서도, 매번 측정할 때마다 배경전압이 변동하지 않도록 하여 장기안정성을 확보할 수 있는 질소산화물 가스센서를 제공하기 위한 것으로, 산소이온 전도성 고체전해질과, 상기 고체전해질과 제1영역에서 접촉하며 금속산화물을 구비하는 제1막과, 상기 제1영역과 분리된 제2영역에서 상기 고체전해질과 접촉하며 금속산화물을 구비하는 제2막과, 상기 제1막과 제1노드를 통하여 연결되고, 상기 제2막과 제2노드를 통하여 연결되며, 상기 제1노드 및 상기 제2노드에 양의 전류와 음의 전류를 교대로 인가하는 교류전원과, 상기 제1노드와 상기 제2노드 사이의 전위차의 절대값을 측정하는 측정부를 포함하여 구성될 수 있다