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Microwave Orbital Angular Momentum Mode Generation and Multiplexing Using a Waveguide Butler Matrix
이왕주,홍주연,강민수,김봉수,김광선,변우진,송명선,조용희 한국전자통신연구원 2017 ETRI Journal Vol.39 No.3
In this paper, we propose a convenient microwave orbital angular momentum (OAM) mode generation and multiplexing method operating in the 18 GHz frequency band, based on a 2 ´ 2 uniform circular array and a 4 ´ 4 Butler matrix. The three OAM modes –1, 0, and +1 were generated and verified using spatial S parameter measurements; the measured back-to-back mode isolation was greater than 17 dB in the full 17 GHz to 19 GHz range. However, the radiated OAM beam centers were slightly dislocated and varied with both frequency and the mode index, because of the non-ideal characteristics of the Butler matrix. This resulted in mode isolation degradation and transmission distance limitations.
이왕주 대한철학회 2010 哲學硏究 Vol.114 No.-
In essential context, the modern reason of the western culture is nothing but the reason of visual subject. The main properties of this visual subject are the transparency, one-sidedness, and surveillance. Gaze is it's way of being in the horizon of life- world. It arrests the partners or objects in the perspective regime and binds them in the network of surveillance. The logo-centric communications are nohing but sharp crossings of diverse gaze in the conflicts of interest. The model of Habermas' communication thoery is not exception in this view. In order to communicate each other well, above all, we should escape from this circuit of cartesian Cogito. Our alternative we want to suggest is to caress. We could identify the bright example of caress in Sancho's look on the face of Don Quixote. I tried to recontextualize Merleau-Ponty's creative concept, the flesh in the context of Levinas' caress. My conclusion is that to communicate each other well, we should regain the capacities of the caress by way of remembering the deep trauma gotten in our lives. 근세적 이성은 그 본질에 있어서 시각주체의 이성이다. 이 시각주체는 투명성, 일방성, 감시를 특징으로 한다. 생활세계의 지평에서 드러나는 이 주체의 존재양식은 응시다. 이것은 상대를 시각장 안에서 포획하고 감시의 권력망 안에 묶어두고 마침내 그것을 (몸으로) 발가벗겨놓는다. 이성중심주의 소통양식은 본질적으로 이해득실이라는 기준에 따라 응시하는 시선들의 첨예한 교차에 지나지 않는다. 이것의 가장 정교한 모델 중 하나인 하버마스의 의사소통행위이론도 이 점에서 예외가 아니다. 먼저 데카르트적 코기토에 의해 구성된 소통 회로로부터 탈주해야 한다. 우리가 제안하는 대안적 소통양식은 애무다. 애무란 이를테면 편력의 어느 국면에서, 상처 받은 돈키호테의 슬픈 얼굴을 바라보는 산초의 시선 같은 것이다. 이 소론에서 우리는 레비나스가 숙고했던 이 타자와의 소통 조건을 퐁티의 살 개념으로 확장시켜 재맥락화 해보았다. 결론은 진정한 소통을 위해 먼저 응시적 이성의 규율권력으로부터 몸을 되찾고, 상처를 통해 우리의 치명적인 살의 얽힘을 재발견함으로써 애무하는 소통 양식을 복권시켜놓아야 한다는 것이다.
이왕주 부산대학교 인문학연구소 1999 人文論叢 Vol.54 No.-
We are now confronted with some serious ecological dangers of global scale. There have been so many suggestion that we could not determine which is good to get tide over the dangers. But, it my opinion, many of such suggestions focus on phenomenal prescriptions. We should think out some radical means in order to solve those serious problems we are confronting now. It this paper, I suggested a strategy of narrative. The strategy of narrative implies a revolutionary change in ecological discourse. First, we should change the vocabularies. So many index, matrix and numbers of arithmetic statistics only make us sick of the ecological matters. Some beautiful vocabularies and poetic words could give us certain understandings or insights. Second, we should make out some story to describe the situations we confront. In order to do this, we should be an active speaker rather than a passive spectator. Through this way, we could shake off the fantasies of the Green too. I cited two kinds of beautiful narration. The one is that of a leader of a native America Indian, and the other is that of the famous French writer, Albert Camus. The narration of the former persuades us that the earth is beyond marketing price, the narration of latter reminds us of the sea's way of being. Those beautiful narratives make us understand the sincere meaning of the nature and the ecological environment in which we live. In this context, for the purpose of solving the ecological problems, it could be the useful for us to produce such a fine narrative.
이왕주 釜山大學校 師範大學 1993 교사교육연구 Vol.27 No.-
The foundational realism is stem from above all the metaphysics of Plato and Kant. But platonic realism could be related by the way of reapplying the allegory of 'cave'. Namely the out side world of cave and real things could be nothing but a believed fantasies. So it proves itself to be not the problem of truth, but the problem of Ideoloy. In the other hand, Kant's metaphysics is a little more sophiscated theories of foundational Realism. But it falls in another fallacy of ontological logic. Namely Kant couldn't get over the fallacy of tautology. Tautology is a kind of analytic judgment. It could be true, but add nothing new to the systems of conclude that no foundational realist could hold himself without committing tautolgy, and the position of every foundational realism never fails to fall in problematic situations.