Fusion of Horizons between Dialogue and Phronesis

본 논문은 가다머 철학의 기본정신인 이론적 과제와 실천적 과제로서의 해석학이 그리스 철학의 기반 위에서 형성되었다는 사실을 이끌어내는 데 그 목적이 있다. 무엇보다도 해석에서 실천으로 이어지는 가다머 철학의 특징을 플라톤-아리스토텔레스적 영향의 통일성 주제를 통해, 더욱 구체적으로는 대화와 프로네시스의 지평융합 논의를 통해 밝히고자 한다. 가다머는 좋음[善]에 대한 소크라테스의 질문을 분석하면서 플라톤 변증법과 아리스토텔레스 윤리학의 공통적 차원을 확보한다. 이른바 변증법적 윤리는 가다머가 자신의 철학을 동기화하는 근본적인 용어다. 그는 플라톤 변증법에 대한 연구방향을 인간 현존재에 대한 현상학적 해명에 그치지 않고 그 실천가능성으로까지 확대해나간다. 인간 현존재가 추구해야 하는 지속적 물음의 과정을 대화에서, 그 수행과정의 원동력을 프로네시스에서 찾음으로써, 결국 철학의 정신을 소유적 관점이 아니라 추구해나가는 도정의 관점에서 환기시킨다. 아리스토텔레스 윤리학, 특히 프로네시스에 대한 재해석의 내용을 담고 있는 논문 후반부는 가다머가 궁극적으로 지향하는 철학의 방향을 확인하는 자리다. 아리스토텔레스의 윤리학을 해석학의 과제 속에 놓인 문제모델의 종류로 간주한 그는 이해를 프로네시스와 연관시킴으로써 실천적 과제로서의 해석학을 정립한다. The purpose of this article is to argue that Hermeneutics, as theoretical and practical task representing Gadamers Philosophy, was built upon the basis of Greek Philosophy. More specifically, this article aims to clarifying the essential feature of Gadamers Philosophy on the basis of Platonic-Aristotelian unity of effect. H.-G. Gadamer confirmed through his analysis of the Socratic Question of the Good that Platonic dialectic and Aristotelian ethics had much in common. The results of this analysis gave birth to the new term Dialectical Ethics as a reflection of the commonality of the philosophies. Gadamer investigated Platonic dialectic in a practical and ethical context. Both the open-ended and ethical character of Platonic philosophy are reflected, he observed, in its dialectical form. He proposed that dialogue was essential to promote continuous questioning and that in the process of debate, Phronesis provided the driving force. In the last analysis, I claim that Gadamers Dialectical Hermeneutics gropes for the infinite questionary route when considering the essential finitude of human existence

지터가 작고 harmonic locking을 막는 이중 루프의 DLL 설계

학위논문(석사)--서울대학교 대학원 :전기공학부,1999.Maste

Open-type과 Closed-type 스월 인젝터의 형상변화에 따른 동특성 연구

학위논문 (박사)-- 서울대학교 대학원 : 기계항공공학부, 2017. 2. 윤영빈.Injector is one of the key component in liquid rocket engines especially when suppressing the combustion instability. Since the injector is located between the feed line and the combustor, injector plays a role as the bridge between the two components. The stable combustion can be achieved if the injector is desgined to be dynamically robust to suppress the feedback interactions among the three components. Therefore, dynamic characteristics of the injector should be investigated in order to establish criteria for injector modification. Open-type and closed-type swirl injectors have been widely used in liquid rocket engines. The type of the swirl injector should be selected based on its pros and cons. However, comparisons between the dynamic characteristics of the open and closed type swirl injectors are not thoroughly studied and further research should be done. In this study, dynamic characteristics of the each open and closed type swirl injectors with varying geometries were investigated through experiments. Influences of diameter of the manifold, diameter of the swirl chamber, length of the swirl chamber, converging angle between the swirl chamber and orifice, and length of the orifice were analyzed. Sinusoidal pressure fluctuations were generated by the hydrodynamic mechanical pulsator to simulate the external disturbances in the actual operation of liquid rocket engine. The feed line pressure measured with static and dynamic pressure sensors were selected as the input parameter and the liquid filim thickness at the injector exit measured with the titanium electrodes were selected as the output parameter since it is closely related with the mass flow rate of the swirl injector. Transfer function between the input and output parameters were obtained throughout the pulsation frequencies of 100 – 1000 Hz. The dominant geometry parameter for each open and closed type swirl injectors were verified. With the obtained experimental data of each geometry parameters sensitivity and tendency, directions for injector design modifications can be given when the combustion instability occurs during the development of a liquid rocket engine.CHAPTER 1 INTRODUCTION 1 CHAPTER 2 EXPERIMENT AND MEASUREMENT SYSTEMS 5 2.1 Types of swirl injector 5 2.2 Hydrodynamic mechanical pulsator 7 2.3 Electric conductance method 16 2.4 Experimental apparatus and conditions 20 CHAPTER 3 DYNAMIC CHARACTERISTICS OF OPEN-TYPE SWIRL INJECTOR 22 3.1 Geometry of open-type swirl injector 22 3.2 Pressure at the swirl chamber exit 25 3.3 Effects of swirl chamber length and diameter variation 27 3.4 Dynamic characteristics in low frequency region 33 3.5 Spray cone angle 46 3.6 Effects of tangential entry number and manifold diameter 49 3.7 Peak amplitude ratio change for each geometry parameter 53 CHAPTER 4 DYNAMIC CHARACTERISTICS OF CLOSED-TYPE SWIRL INJECTOR 55 4.1 Closed-type swirl injector geometry 55 4.2 Swirl chamber diameter variation 58 4.3 Swirl chamber length variation 60 4.4 Converging angle variation 62 4.5 Orifice length variation 64 4.6 Spray structures 66 4.7 Influence of swirl chamber length on the second peak frequency 68 CHAPTER 5 CONCLUSION 73 REFERENCES 76 ABSTRACT IN KOREAN 79Docto

Design of a dual-mode direct-conversion CMOS transceiver for bluetooth and IEEE 802.11b

학위논문(박사)--서울대학교 대학원 :전기공학부,2003.학위논문(박사)-

Streptozotocin으로 당뇨를 유도한 백서에서 비타민 C의 보강이 Cytochrome P450와 지질과산화에 미치는 영향

학위논문(석사)--서울대학교 대학원 :식품영양학과,1997.Maste